DE19714861C1 - Clamping device for connecting workpiece to workbench - Google Patents

Abstract

The clamping device is configured so that movement of the locking element (144) from the locked to the unlocked position takes place in a direction running transversely to the swivel plane (114) of the actuating lever (122). Or the movement may occur perpendicularly to the swivel plane. The movement is generally in a straight line although the movement may be a swivel motion in a plane orientated transversely to the swivel plane of the actuating lever.

Description

The present invention relates to a tensioning device, especially a quick release device that has a base, an articulated arm connected to the base, a ge articulated to the base and articulated to the tension arm NEN, in a pivoting plane pivoting lever and comprises a locking element which is in a locking position is locked with a locking member that a Relative movement between the locking element and the Locking member prevented and the operating lever in a Rie gel position is locked relative to the base, and that from the locking position in an unlocking position be is movable, in which the locking element is a movement of the operating lever relative to the base, the Actuating lever through the locking element in one Clamping position is lockable.

Such clamping devices are from the US patent 4,141,543 and from German patent 36 04 995 known. Clamps of this type are used to create a work piece for a machining process on a base, at for example, a workbench. To determine the Workpiece, the actuating lever is in a clamping position brought, which corresponds to a clamping position of the clamping arm, in which the clamping arm a clamping force on the between the Pad and clamped workpiece exerts. To the The actuator is inserted and the workpiece is removed brought into a relaxation position, which one Relax position of the tension arm corresponds in which the  Clamping arm releases the workpiece. To prevent accidental opening NEN to the clamping device during the machining process prevent, is according to US Pat. No. 4,141,543 see the operating lever in its tensioned position relatively to lock to the base by a  Locking element parallel to the swivel plane of the actuator tion lever is pivoted into a locking position. To lock the operating lever in its clamping To release position, the locking element is also parallel to the swivel plane of the operating lever from the Locked position moved to an unlocked position, in which there is a pivotal movement of the operating lever in its Allows relaxation position.

In the known tensioning device is disadvantageous in that Unlocking the locking element in the swivel Actuator located above the actuating lever supply element must be operated, which is an unfavorable handle position that forces the hand gripping the operating lever.

The present invention is therefore based on the object a clamping device of the type mentioned to ver improve that easier and safer handling of the Be actuation lever and the means for unlocking the lock Gelungselementes is possible.

This object is achieved with a tensioning device with the features of the preamble of claim 1 thereby ge triggers that the clamping device is designed so that the Movement of the locking element from the locking position in the unlocking position at least partially in one across the pivoting plane of the actuating lever direction.

The concept according to the invention has the advantage that both the operating lever and the means for unlocking the Locking element more easily accessible and light ter and safer can be operated because the means of unlocking  development of the locking element outside the pivoting plane of the Actuating lever can be arranged next to the same.

The fact that the operating lever ver in a clamping position lockable, it is ensured that there is a clamped Workpiece during machining not due to the processing of self-generated or environmental influences resulting vibrations, due to accidental Actuation of the actuation lever or due to an incorrect Stigen installation position of the clamping device, for example in Overhead position, moved from its clamped position.

The locking element is in the locked position locked the locking member. Thus, a form fit Relative movement between the locking element and the Locking element prevented in the locking position. Here can the locking member of the operating lever itself or a be the element of the clamping device.

It is known from US Pat. No. 3,734,481 a Drawbar by clamping by means of a cross to the rod to fix the movable shaft in its axial position. A The drawbar is not locked.

A span is from the German utility model 90 03 360 device known, which is provided with a lock, wel che the lever of the tensioner on its way from a relaxation position to a tensioned position opposed increased resistance to an automatic return position of the actuating lever in the clamping position prevent. The lock is in a transverse to the swivel plane of the Operating lever extending direction resettable if the operating lever be with a sufficiently large force  is done. This lock can therefore be a movement of the Actuating lever relative to the base of the jig not reliably prevent.

It is special in the tensioning device according to the invention favorable if the movement of the locking element from the Locked position in the unlocked position in essentially perpendicular to the pivoting plane of the actuation lever runs. Because when clamping the workpiece only forces are effective, which are parallel to the pivoting plane of the Actuate lever is due to the measure mentioned guaranteed even when the clamping device is overloaded, that on the locking element no forces along it Unlock direction act, which is an unwanted entry could effect. Rather, an unwanted occurs Unlock the locking element when overloaded then when the clamping device is destroyed.

The movement of the locking element from the locking position in the unlocked position can be essentially a straight movement.

Alternatively, it can also be provided that the movement of the locking element from the locking position in the unlocking position is essentially a swivel movement supply in a transverse to the swivel plane of the actuating lever aligned level.

In the latter case, an undesirable twisting of the lock gelungselements in a crosswise to its swivel plane prevent locking direction, the locking element advantageously on a bearing element with a  non-rotationally symmetrical cross section, preferably on a square, stored.  

The safety and ease of use of the Spannvor direction, it is used when the operating lever in several rows gel positions is lockable.

A simple construction with little manufacturing effort is achieved when the operating lever is in several Ren locking positions by the same locking element can be locked.

It when the actuating lever in a Clamping position is lockable in the on the clamping arm transferable clamping force is essentially maximum. By the possibility of locking the operating lever in this clamping position is the clamping position with the maximum transferable clamping force before other clamping positions draws and can easily when clamping the workpiece be found.

If the operating lever advantageously in a Ent voltage position can be locked, this guarantees Continues that a workpiece is inserted safely and freely can be removed without the jig  accidentally closes. Such protection against un Intended closing is particularly important if a heavy operating lever or a heavy one, for example exhibit with a pressure piece for transmitting the clamping force the workpiece provided clamping arm can be used.

It is also advantageous if the locking element also held in the unlocked position on the clamping device is. In this way, the locking element can not ver go out and always stands for locking the actuation lever available.

In particularly preferred embodiments of the Invention according clamping device the same is designed so that the Locking element automatically in the locking position is moved when the operating lever is in the locking position is pivoted. Such automatic locking of the Actuating lever offers optimal security. Furthermore, the Movement of the locking element in the locking position development on an actuating element for actuating an entrance Gelungsvorrichtung the locking element clearly recognize bar and tactile, so that the locking operation of the operator nungsperson of the clamping device reaching the latch position of the operating lever.

For the arrangement of the locking element in the Spannvor direction there are a variety of options.

So the locking element in the actuating lever ver slidably guided or pivotable on the operating lever be kept.  

Alternatively, it can also be provided that the locking tion element slidably guided in the base or on the Base is pivoted.

A particularly convenient handling of the unlocking Mechanism is achieved when the locking element is off the locking position in several unlocking positions is movable. Depending on the position of the clamping device and depending on the position of the elements of the clamping device relative to one another in this case, the unlocking can be different position for unlocking the operating lever be selected in which the locking element on the one the most professional way.

It when the locking element in is particularly favorable two substantially opposite directions in one unlocking position is movable. This is it is possible to use the unlocking device for locking tion element to be provided with two actuators arranged on different sides of the operating lever are, so that an equally easy release of the Locking element for left and right-handed users is.

Up to the type of tensioning mechanism used itself for a long time no further details have been given.

It can be provided that the actuating lever by means of at least one tendon attached to the operating lever and is articulated on the tension arm, articulated with the tension arm connected is. The actuating lever and the or form the tendons together a toggle lever whose lever arms in the clamping position essentially parallel to each other and  aligned transversely to each other in the relaxation position are.

The above-described configuration of the articulated Ver binding between the actuating lever and the tension arm is suitable himself to the clamping device as so-called perpendicular train tensioner, in which the actuating lever in the Tension position essentially perpendicular to a support area of the base with which the base rests on the base lies, is aligned.

Alternatively, it can also be provided that the actuator lever by means of at least one tendon attached to the Actuating lever is articulated, articulated with the base is bound. Here too, the actuating lever and the or the tendons together a toggle lever, the he arm in the tensioned position essentially parallel to each other different and in the relaxation position across from each other are directed.

The above-described configuration of the articulated Ver binding between the operating lever and the base himself to the tensioning device as a so-called horizontal train tensioner, in which the actuating lever in the Clamping position essentially parallel to a support surface the base with which the base rests on the base, if the base rests on a horizontal surface, horizontally, is aligned.

Both in the design of the Spannvor according to the invention direction as a vertical clamp as well as in the design as a horizontal tensioner it can be provided that the locking tion element in the locking position so with the instep  is locked that the operating lever in the bolt position is locked.

Alternatively, it can also be provided that the actuator lever is articulated on the tension arm and on the base. This configuration of the articulated connection between the Actuating lever and the tension arm on the one hand and between the Actuating lever and the base on the other hand is suitable for Training of the tensioning device according to the invention as a so-called named clamp tensioner, in which the tension arm a tension hook carries a locking element in the tensioned position engages behind.

In all the above-mentioned configurations of the inventions Invention clamping device can be provided that the Locking element in the locking position so with the Base is locked that the operating lever in the latch position is locked.

Alternatively or additionally, it can also be provided that the locking element in the locking position with the operating lever is locked that the operating lever is locked in the locking position.  

If the locking element advantageously a Rie Has gel area, which in the locked position with the Locking member is locked and in the locking position along the direction in which the locking element of the locking position in the unlocking position is movable, protrudes beyond the locking member, is guaranteed that even after edge wear due to frequent back and forth Moving the locking element out of the locking position in the unlocked position and back, on off sufficiently large latch area for locking with the lock link is available.

For easy and quick unlocking of the locking elements, it is an advantage if the Verrie gelungselement coupled to an unlocking device is through which the locking element from the locks is in the unlocked position.

A particularly simple embodiment of such entrances lungsvorrichtung comprises one along a transverse, preferably perpendicular to the swivel plane of the actuating lever direction push button.

Alternatively or in addition to this, the unlocking can direction one in one to the swivel plane of the actuation lever crosswise, preferably substantially vertically directed level include pivoting rocker.

The rocker can be held on the operating lever.

To achieve that the locking element at rest position of the unlocking device, in which the same is not is operated, held in the locked position,  the rocker can be pressed against the actuator by means of a compression spring be levered.

Alternatively or in addition to this, the rocker can be operated by means of a Leaf spring must be clamped against the operating lever.

A particularly good hold of the seesaw and a particularly precise Guiding the pivoting movement of the rocker is achieved when the Seesaw by means of the locking element and another Guide element is guided on the operating lever.

It is advantageous if the unlocking device is a loading Actuating element for manual actuation of the release device includes that in the access area of the operation lever is arranged. This makes it possible to activate the actuator tion element of the unlocking device with the same hand to actuate the actuating lever of the tensioning device grips without releasing the operating lever or a white need to take your hand.

It is particularly favorable if the actuating element is longitudinal one across the pivoting plane of the actuating lever fenden direction offset from the operating lever is arranged. In this case, it is a convenient one-handed operation operation of the operating lever and the unlocking device from the right or left, from the front or rear, at an angle position or overhead position possible.

In particular, the actuating element can be left or right be arranged next to the pivoting plane of the actuating lever.

The invention based on the drawing Dar position of embodiments explained.

The drawings show:

Fig. 1 is a side view of a first embodiment form of a tensioning device, which is designed as a lower right-hand clamp and a Entrie gelungsvorrichtung with a rocker, which is clamped by means of a compression spring against the actuating lever Be;

FIG. 2 is a front view of the first embodiment of a tensioning device from FIG. 1, the locking element being in the locking position; FIG.

Fig. 3 is a front view of the first embodiment of a tensioning device from Figure 1, wherein the locking element is in the unlocking position.

Figure 4 is a front view of a second embodiment form of a clamping device which is designed as a right-hand clamp and which includes an unlocking device with a rocker which is clamped against the actuating lever by means of a leaf spring.

Fig. 5 is a front view of a third embodiment form of a tensioning device which is designed as a lower right-hand clamp, which comprises an unlocking device with a rocker and in which a clamping device arranged on the side of the unlocking device acts as a locking member with the locking element, the Locking element is in the locking position;

FIG. 6 is a front view of the third embodiment of a tensioning device from FIG. 5, with the locking element in the entry position;

Fig. 7 is a front view of a fourth embodiment form of a tensioning device, which is designed as a lower right-hand clamp and a Entrie gelungsvorrichtung with a push button summarizes, wherein the locking element is in the locking position;

Fig. 8 is a front view of a fifth embodiment of a tensioning device which is designed as a right-hand lowering and in which a left and a right unlocking position are provided for the locking element, the locking element being in the locking position;

FIG. 9 is a front view of the fifth embodiment of a tensioning device from FIG. 8, the locking element being in the right unlocked position;

FIG. 10 is a front view of the fifth embodiment of a tensioning device from FIG. 8, the locking element being in the left unlocking position;

Fig. 11 is a front view of a sixth exporting approximate shape of a clamping device, which is designed as a Vertical clamp and wherein the locking element of the INTERLOCKS lung position to the unlocked position is pivotable, wherein the locking det selement befin in the locking position;

FIG. 12 is a front view of the sixth embodiment of a tensioning device from FIG. 11, where the locking element is in the unlocking position;

Fig. 13 is a front view of a seventh embodiment form of a clamping device which is designed as a right-hand clamp, which comprises an unlocking device with a rocker and in which the locking element is designed as a locking pin, the locking element being in the locking position;

Fig. 14 is a side view of an eighth embodiment form of a tensioning device, which is designed as a Waag right-hand tensioner and comprises an unlocking device with a rocker, the actuating lever being locked in the tensioning position;

.. A side view of the eighth embodiment of a clamping device of Figure 14, wherein the operating lever is locked in the detente position Fig 15;

Figure 16 is a plan view of the eighth embodiment of a tensioning device from Figure 14, wherein the actuating lever in the tensioning position and the locking element are in the locking position Ver.

Fig. 17 is a plan view of the eighth embodiment of a tensioning device from Fig. 14, wherein the actuating lever in the tensioning position and the locking element are in the unlocking position;

Fig. 18 is a plan view of a ninth embodiment form of a tensioning device, which is designed as a Waag right-hand tensioner and a Entrie gelungsvorrichtung with a push button summarizes, with the actuating lever in the clamping position and the locking element in the locking position;

Fig. 19 is a side view of a tenth embodiment form of a tensioning device, which is designed as a closure tensioner and comprises an unlocking device with a rocker;

Fig. 20 is a plan view of the tenth embodiment of a tensioning device of Figure 19, where the locking element is in the locking position Ver ..;

FIG. 21 is a plan view of the tenth embodiment of a tensioning device from FIG. 19, where the locking element is in the unlocking position;

Fig. 22 is a side view of an eleventh embodiment form of a tensioning device, which is designed as a circuit tensioner and in which the locking element is pivotally mounted on the base;

FIG. 23 is a front view of the eleventh embodiment of a tensioning device from FIG. 22, with the locking element in the locking position; FIG.

FIG. 24 is a front view of the eleventh embodiment of a tensioning device from FIG. 22, with the locking element in the unlocking position; FIG.

Fig. 25 is a front view of a twelfth embodiment of a tensioning device which is designed as a locking tensioner and in which the locking element is displaceably guided in the base ver, the locking element being in the locking position;

Fig. 26 is a front view of a thirteenth embodiment of a tensioning device, which is designed as a locking tensioner and in which the locking element is guided in the base ver, wherein the locking element is in the locking position;

FIG. 27 is a front view of a fourteenth exporting approximate shape of a clamping device, which is designed as a shutter release, and wherein the locking member is elastically fixed to the base and wherein the Verrie gelungselement is in the locking position;

FIG. 28 is a cross section through a fifteenth imple mentation form of a clamping device, which is designed as a shutter release, and wherein said locking element is formed as a spring pin made, wherein the locking element det befin in the locking position;

Fig. 29 shows a cross section through a sixteenth embodiment of a tensioning device which is designed as a locking tensioner and in which the locking element is formed as a spring pin, the locking element being in the locking position.

In all figures, the same or functionally equivalent Elements with the same reference numerals.

In the following, the front of the tensioning device applies the side on which the clamping arm is arranged.

A first embodiment shown in FIGS . 1 to 3 form of a clamping device is formed as a vertical clamp, that is, the operating lever is in the clamping position, which is shown in FIG. 1 in solid lines, substantially perpendicular to the support surface of the base aligned. The position of the elements of the tensioning device in the relaxed position of the actuating lever is shown in broken lines in FIG. 1.

The clamping device designated as a whole with 100 comprises a base 102 which comprises a left foot 104 a and a right th foot 104 b. Each of the feet 104 a, 104 b has the shape of an angle, one leg of the angle forming a base plate 106 and the other leg forming a support plate 108 .

The underside of each base plate 106 serves as a support surface 110 with which the clamping device 100 can be placed on a base, for example a workbench. Each of the base plates 106 is penetrated perpendicularly to the support surface 110 by through holes 112 which serve to receive fastening means, for example screws, for fixing the base 102 to a base.

The feet 104 a and 104 b of the base 102 are arranged in such a way from each other that their carrier plates 108 are parallel to each other and symmetrical with respect to a central plane 114 designated clamping device 100 are aligned.

In the following, those pages are the elements of the clamping device 100 of the chuck face 100 of the midplane 114, be as the inner sides of these elements is distinguished, while those sides of the elements of the clamping device 100, which are turned away 114 of the mid-plane than the outer sides thereof be designated.

A lever limb 118 is articulated on the base 102 on the outside of each carrier plate 108 by means of a first joint 116 . The free ends of the lever legs 118 are bent symmetrically to the central plane 114 of the clamping device 100 inwards so that they abut one another and surrounded by egg nem, for example made of plastic, actuating lever handle body 120 . Together with the actuating lever handle body 120, the two lever legs 118 form an actuating lever 122 of the tensioning device 100 .

On the inside of each of the lever legs 118 , a clamping member 126 is articulated to the actuating lever 122 by means of a second joint 124 arranged between the first joint 116 and the actuating lever handle body 120 , where the one arranged to the left of the central plane 114 (in the front views of FIG. 2 and 3, therefore, the right of the telephoto plane 114 drawn) clamping member in the following as a left clamping member 126 a and the attached right of the center plane 114 disposed (in the front views of Figs. 2 and 3, therefore, left drawn from the median plane 114) clamping member in the fol is referred to as the right tendon 126 b.

On the inner sides of the second joint 124 facing away from the free ends of the tensioning elements 126 is in each case articulated by means of a third articulation 128, a arm segment 130 to the respective tensioning member 126th

Further, each of the arm segments is the base 102 arranged on the inner side 130 each weils a support plate 108 by means of a above the first joint 116 and is hinged by the third hinge 128 spaced fourth articulation 132 to the base 102nd

The two arm legs 130 lie in the region of the third Ge joint 128 and the fourth joint 132 against each other and are bent toward their free end facing away from the fourth joint 132 towards the outside, so that the free ends of the arm legs 130 are spaced apart. The two arm legs 130 thus together form a fork-shaped tension arm 134 of the tensioning device 100 .

The hinge axes of the first to fourth joints 116 , 124 , 128 and 132 are aligned parallel to one another, so that the actuating lever 122 , the tensioning members 126 and the tensioning arm 134 are each pivotable in parallel to the center plane 114 aligned pivot planes.

The actuating lever 122 forms, together with the tension members 126, a toggle lever, the second joint 124 serving as the knee joint of the toggle lever. In the clamping position shown in solid lines in Fig. 1, this toggle lever is essentially closed, that is, the lever arms of the toggle lever, namely the region between the first joint 116 and the second joint 124 arranged area of the actuating lever 122 and the between the Areas of the tendons 126 arranged in the second joint 124 and the third joint 128 are oriented essentially parallel to one another. In the tension position shown in broken lines in FIG. 1, the toggle lever is angled, that is, the lever arms of the toggle lever are aligned transversely to one another.

In the relaxed position, the actuating lever 122 bears against a stop pin 135 held by the carrier plates 108 , which limits the pivoting movement of the actuating lever 122 downward.

The left tendon 126 a and the right tendon 126 b are not symmetrical to each other. Rather, the right tendon 126 b at its rounded end adjacent to the second joint 124 be a comb 136 along its circumference, which the left tendon 126 a is missing.

The comb 136 has a step 137 with a blocking surface 138 oriented radially to the second joint 124 . Furthermore, the comb 136 has at its edge an axially extending to the axis of the second joint 124 groove 140 with a wesent union radially aligned to the axis of the second joint 124 locking surface 142 . The step 137 and the groove 140 are arranged at an angular distance of approximately 90 ° with respect to the axis of the second joint 124 .

The step 137 and the groove 140 of the comb 136 act in a locking position shown in Fig. 2 with a locking element Ver in the form of a pawl 144 , which extends substantially perpendicular to the central plane 114 . The pawl 144 is slidably guided in the actuating lever 122 through a respective guide hole 146 provided in each lever arm 118 of the actuating lever 122 , the guide holes 146 being arranged in the lever legs 118 between the second joint 124 and the actuating lever handle body 120 .

The pawl 144 has on its right (in the front view of FIG. 3 to the left of the center plane 114 ) end a stop lug 148 , the inside of which faces the center plane 114 forms a stop surface 150 . Furthermore, the pawl 144 on its edge facing the second joint 124 has an unlocking recess 152 and on the same edge near its left end (shown on the right in the front view of FIGS. 2 and 3) has a further recess 154 through which in the Jack 144 forms a jack neck 156 ge.

The pawl 144 engages in the region of the pawl neck 156 a through opening 158 in a rocker 160 , which is arranged on the left ne ben of the actuating lever 122 and is mounted on the first joint 116 in such a way that the rocker 160 is relative in a plane substantially perpendicular to the central plane 114 is pivotable to the operating lever 122 . The mounting of the rocker 160 on the first joint 116 takes place in that the pivot pin 162 of the first joint 116 protrudes at its left end beyond the left lever arm 118 a of the actuating lever 122 , a through hole 164 extends through the rocker 160 and on its left End is provided with an annular collar 166 that prevents the rocker 160 from sliding off the pivot pin 162 .

The rocker 160 is seen at its free end with a rocker handle body 168 , which is made of plastic, for example. This rocker handle body 168 serves as an actuating element for manual actuation of the rocker 160 .

Furthermore, one end of a compression coil spring 170 is fixed to the rocker 160 , which surrounds the pawl 144 and whose spiral axis is oriented substantially perpendicular to the central plane 114 . With its other end the compression coil spring 170 on the lever 160 adjacent left leg 118a of the operating lever 122 fixed to the rocker, so that the compression coil spring 170, the rocker 160 clamped against the actuating lever 122nd

When acting on the rocker handle body 168 no counterforce 170 presses the compression coil spring, the rocker 160 of the Actuate the supply lever 122 away, thereby coupled to the rocker 160 pawl 144 in the in Fig. Latching Stel shown 2 is brought lung. The pivoting movement of the rocker 160 and the rectilinear motion of the coupled to the rocker 160 pawl 144 are thereby by the stop lug 148 of the latch 144 be limited, which abutment surface 150 b in the locking position on the outer side of the right lever leg 118 of Actuate the applied supply lever 122nd

If, as shown in Fig. 2, the actuating lever 122 is in the tensioned position, then in the locking position of the pawl 144, a recess between the unlocking 152 of the pawl 144 and the stop lug 148 of the pawl 144 arranged latch area 172 of the pawl 144 so with the step 137 of the comb 136 of the right tendon 126 b together that a relative movement between the right tendon 126 b and the pawl 144 is prevented. Since the pawl 144 is guided in the actuating lever 122 , it is prevented by a relative movement between the tensioning members 126 and the actuating lever 122 . Thus, the opening angle of the tension members 126 and the operating lever 122 toggle lever cannot be changed, so that the operating lever 122 , the tension arm 134 and the base 102 are fixed in position relative to each other. The actuation lever 122 is thus locked by the interaction of the pawl 144 with the right tendon 126 b in its position rela tively to the base 102 .

.. The transition of the clamping device 100 of the embodiment illustrated in Figure 1 in solid lines clamping position of the supply Actuate the lever 122 in the question asked in Figure 1 in broken lines represents relaxation position of the actuating lever 122 is accomplished as follows:
By manual actuation of the rocker handle body 168 , the rocker 160 is pivoted toward the actuating lever 122 against the compressive force of the compression coil spring 170 . The coupled with the rocker 160 pawl 144 is moved in a direction perpendicular to the central plane 114 from the locking position shown in FIG. 2 in the unlocking position shown in FIG. 3 moved.

In this unlocking position, the step 137 of the comb 136 of the right tendon 126 b faces the unlocking recess 152 in the pawl 144 , so that in the unlocking position of the pawl 144 the tendons 126 can be pivoted about the second joint 124 relative to the actuating lever 122 .

The actuating lever 122 can therefore (in the view of FIG. 1 clockwise) from the tensioned position in the Ent tensioned position pivoted.

As soon as the actuating lever 122 has left the clamping position, no more force has to act on the rocker handle body 168 , since in all intermediate positions between the clamping and the unclamping position of the actuating lever 122 the comb 136 of the right clamping member 126 b so that the right edge of the opening recess 152 the pawl 144 cooperates to prevent the pawl 144 from moving back into the locking position.

The pawl 144 is thus held by the comb 136 of the right clamping member 126 b during the pivoting movement of the actuating lever 122 in the unlocked position until the pivot 140 of the right clamping member 126 b about the second joint 124 relative to the pawl 144 is the groove 140 of the right Tendon 126 b faces the right edge of the unlocking recess 152 . In this position, the loading of the pawl 144 is perpendicular to the center plane 114 , so that the pawl 144 is moved from the unlocking position back to the locking position due to the action of the compression spring 170 . The choice of the angular distance between the step 137 and the groove 140 of the comb 136 of the right tendon 126 b ensures that the movement of the pawl 144 is released when the actuating lever 122 presented in Fig. 1 in broken lines Darge Relaxation position reached. This ensures that the actuating lever 122 is automatically locked in the relaxation position and an unintentional closing of the tensioning device 100 is excluded.

In order to ensure proper functioning of the locking of the actuating lever 122 even after repeated use of the clamping device 100 , the locking area 172 of the pawl 144 is designed such that it is in the locking position of the pawl 144 (see FIG. 2) on the inside of the right tendon 126 b protrudes toward the central plane 114 . This ensures that the pawl 144 can still cooperate over the entire width of the locking surface 138 with the step 137 or over the entire width of the locking surface 142 with the groove 140 of the comb 136 of the right-hand tendon 126 b when the unlocking recess 152 due to edge wear due to the back and forth movement of the pawl 144 from the locking position to the unlocking position and back at the expense of the locking area 172 .

The arrangement of the rocker handle body 168 adjacent to the loading tätigungshebel 122 in the immediate vicinity of Actuate the supply lever handle body 120, it is possible to release the lock of the operating lever 122 in the clamping position with the operating lever 122 hand gripping, without releasing the Be tätigungshebel 122 or another hand to help. Due to the convenient arrangement of the actuating lever handle body 120 and the rocker handle body 168 , the tensioning device 100 can be actuated by one-hand operation from the right or left, from the front or from the rear, in an inclined position or in an overhead position.

The secure latching of the pawl 144 in the locking position can be clearly recognized and felt by the pivoting movement of the rocker 160 associated therewith.

Since the movement of the pawl 144 acting as a locking element from the locking position into the unlocking position is substantially perpendicular to the loading direction, the locking of the actuating lever 122 is only released even when overloaded when the tensioning device 100 is destroyed.

A second embodiment shown in Fig. 4 of a clamping device is also ausgebil det as a vertical clamp and differs from the first embodiment described above only in terms of unlocking device for the locking element.

As can be seen from FIG. 4, the unlocking device of the second embodiment of the tensioning device 100 also includes a rocker 174 coupled to the pawl 144 . However, in contrast to the rocker 160 of the first embodiment, this rocker 174 of the second embodiment is not rigidly formed and pivotably mounted on the pivot pin 162 of the first joint 116 , but instead is formed as an elastic leaf spring and by means of the annular collar 166 of the pivot pin 162 set on the outside of the left lever arm 118 a of the operating lever 122 .

The rocker 174, which is designed as a leaf spring, is preloaded in such a way that the rocker 174 is pushed away from the actuating lever 122 in the absence of a counterforce acting on the rocker body 168 , so that the rocker 174 in the manner already described in connection with the first embodiment coupled pawl 144 is in the locking position.

The rocker 174 designed as an elastic leaf spring of the second embodiment thus takes over the functions of the rigid rocker 160 and the compression coil spring 170 of the first embodiment, so that in the second embodiment of the tensioning device 100 there is no need for a spring arranged between the rocker 174 and the actuating lever 122 .

The area of the rocker 174 , which it extends from the free end of the same to the area of the through opening 158 , is designed as a U-shaped profile that opens towards the actuating lever 122 .

Otherwise, the second embodiment of the clamping device is correct direction regarding structure and function with the above described first embodiment.

A third embodiment shown in FIGS. 5 and 6 form of a tensioning device is also designed as Senkrechtspan ner and differs from the above-described first embodiment only in terms of the design of the tendons and the pawl.

As can be seen from FIGS. 5 and 6, in the third embodiment of the clamping device 100 compared to the first embodiment, the two tendons have been interchanged, ie the left tendon 176 a (shown on the right in the front views of FIGS. 5 and 6) third embodiment corresponds in terms of its structure with chimney 136 , step 137 and groove 140 to the right tendon 126 b of the first embodiment, while the (in the Vorderan views of FIGS . 5 and 6 drawn on the left) right tendon 176 b of the third embodiment in terms of its Structure corresponds to the left tendon 126 a of the first embodiment.

The pawl 178 of the third embodiment differs from the pawl 144 of the first embodiment in that there is no unlocking recess 152 in the pawl 178 of the third embodiment and that the extension of the stop lug 148 perpendicular to the central plane 114 is enlarged in such a way that the stop surface 150 of the stop lug 148 in the locking position of the pawl 178 shown in FIG. 5 rests on the inside of the left lever arm 118 a of the actuating lever 122 . As a result, in the third embodiment of the tensioning device 100, the impact lug 148 of the pawl 178 and the left tensioning member 176 a cooperate to lock the actuating lever 122 in the tensioning or tensioning position.

If the pawl 178 is moved in the manner described in connection with the first embodiment by manual actuation of the rocker 160 from the locking position into the unlocking position shown in FIG. 6, the impact lug 148 of the pawl 178 is no longer the blocking surface 138 of step 137 or the locking surface 142 of the groove 140 of the left tendon 176 a opposite, so that a pivoting movement of the tendons 126 relative to the pawl 178 and thus relative to the actuating lever 122 is no longer blocked.

Otherwise, the third embodiment of the clamping device is correct direction regarding structure and function with the above described first embodiment.

A fourth embodiment of a tensioning device shown in FIG. 7 is also designed as a vertical tensioner and differs from the first embodiment described above with regard to the design of the unlocking device for the pawl.

As can be seen from FIG. 7, the fourth embodiment of the clamping device 100 has no rocker 160 . Instead, the pawl 144 of the fourth embodiment is provided with a push button 180 at its left end (shown on the right in the front view of FIG. 7). The pawl 144 surrounding pressure coil spring 170 is in the fourth embodiment on the one hand on the outside of the left lever arm 118 a of the operating lever 122 and on the other hand on the inside of the push button 180 set.

In the fourth embodiment, the push button 180 serves as an actuating element for the unlocking device of the pawl 144 . If no counterforce is exerted on the push button 180 , the pressure coil spring 170 presses the push button 180 and thus the pawl 144 rigidly connected to the push button 180 into the locking position of the pawl 144 shown in FIG. 7.

By manually actuating the push button 180 against the pressure force of the compression coil spring 170 , the pawl 144 rigidly connected to the push button 180 can be moved from the locking position into the unlocking position (not shown), in which the pawl 144 pivots the tendons 126 relative to the pawl 144 and thus relative to the actuating lever 122 .

The push button 180 is arranged a the Actuate the supply lever handle body 120 hand gripping in the access region so that the push button 180 with a finger, preferably the thumb, of that hand may be operated without the hand must be detached from the operating lever handle body 120th

Otherwise, the fourth embodiment of the clamping device is correct direction regarding structure and function with the above described first embodiment.

A fifth embodiment shown in FIGS. 8 to 10 form of the clamping device of a clamping device is also designed as a vertical clamp and differs from the fourth embodiment described above in that two unlocking positions for the locking element are provided.

The pawl 182 serving as the locking element of the fifth embodiment of the tensioning device 100 differs from the pawl 144 of the fourth embodiment in that it has no unlocking recess 152 and no stop lug 148 , but instead instead on its (in the front view of FIGS. 8 to 10 shown on the left) right end carries a substantially cylindrical locking body 184 , the axis of which is oriented perpendicular to the central plane 114 and on its circumference a locking ridge 186 projecting radially towards the second joint 124 and a guide projecting radially away from the second joint 124 comb 188 carries.

The cylindrical latch body 184 passes through a guide opening 190 in the right lever arm 118 b of the actuating lever 122 , the cross-section of which essentially corresponds to the cross section of the latch body 184 , and is provided at its right end arranged outside the actuating lever 122 with a second push button 192 .

A second compression coil spring 194 , the spiral axis of which is oriented perpendicular to the central plane 114 and which surrounds the pawl 182 , is fixed to the left end of the locking body 184 arranged between the lever legs 118 of the actuating lever 122 . The same as in the fourth embodiment, the first compression coil spring 170 is fixed in the fifth embodiment of the tensioning device 100 only on the inside of the first push button 180 , but not on the actuating lever 122 .

If both compression coil springs 170 and 194 are relieved, the pawl 182 is in the locking position shown in FIG. 8. In this locking position, the locking comb 186 interacts with the locking surface 138 of the step 137 or the locking surface 142 of the groove 140 of the comb 136 of the right clamping member 126 b in such a way that a pivoting movement of the clamping members 126 relative to the pawl 182 and thus relative to the actuating lever 122 is prevented. As a result, the actuating lever 122 is locked in the locking position relative to the base 102 .

By pressing the first push button 180 against the pressure force of the first compression coil spring 170 , the pawl 182 can be moved into a right-hand unlocking position shown in FIG. 9. In this right unlocking position, the locking comb 186 is no longer the locking surface 138 of the step 137 or the locking surface 142 of the groove 140 of the comb 136 of the right tendon 126 b, so that a pivoting movement of the tendons 126 relative to the pawl 182 and thus relative to the actuating lever 122 is possible.

By actuating the second push button 192 against the pressure of the second pressure coil spring 194 , the pawl 182 can be moved into a left unlocking position shown in FIG. 10. Also in this left unlocking position, the locking comb 186 of the locking body 184 does not face the locking surface 138 of the step 137 or the locking surface 142 of the groove 140 of the comb 136 of the right tendon 126 b, so that a pivoting movement of the tendons 126 relative to the pawl 182 and thus relative to the actuating lever 122 is possible.

The advantage of the fifth embodiment of the clamping device 100 lies in the fact that, depending on the grip position of a hand encompassing the actuating lever handle body 120 , the more easily accessible either of the two push buttons 180 or 192 can be actuated to move the pawl 182 from the locking position into one of the United states Unlocking positions to be.

Otherwise, the fifth embodiment of the clamping device is correct direction regarding structure and function with the above fourth embodiment described.

A in FIGS. 11 and 12 shown sixth exporting approximate shape of a clamping device is also formed as a countersunk right spanner and is different from the one described before standing fourth embodiment as to the nature of the locking element used and the lock-out device Ent.

As a locking element in the sixth embodiment form of the clamping device 100, a cylindrical locking pin 196 , the first guide hole 198 in the (in the Vorderan views of FIGS . 11 and 12 shown on the right He left leg 118 a of the operating lever 122 and a second guide hole 200 in the right lever leg 118 b of the actuating lever 122 (shown on the left in the front views of FIGS. 11 and 12). The locking pin 196 carries at its end projecting beyond the outside of the left lever arm 118 a an annular collar 202 and in the projecting area beyond the outside of the right lever arm 118 b an annular collar 204 , the two collars 202 and 204 preventing the Locking pin 196 falls out of one of the guide holes 198 or 200 .

On the arranged between the inner sides of the lever legs 118 of the actuating lever 122 area of the locking pin 196 , one end of a tension coil spring 206 is fixed, the spiral axis of which is oriented essentially parallel to the longitudinal direction of the lever legs 118 and which at another end on one of the pivot pins 208 of the second Joint 124 surrounding sleeve 210 is fixed.

The first guide hole 198 has a larger cross section than the locking pin 196 , and the second guide hole 200 is formed as an elongated hole which extends in a radial direction to the Ge articulation axis of the second joint 124 in the right lever arm 118 b, so that the locking pin 196 is pivotable in a pivot plane aligned perpendicular to the center plane 114 .

The left end region 212 of the locking pin 196 serves as an actuating element for unlocking the locking pin 196 .

Acts counterforce on the end portion 212 of the latch pin 196 no Ge, so 206 locking position shown 11 draws the tension coil spring the locking pin in its in Fig.. In this locking position, the locking pin 196 interacts with the locking surface 138 of the step 137 or locking surface 142 of the groove 140 of the comb 136 of the right clamping member 126 b in such a way that a pivoting movement of the clamping members 126 relative to the locking pin 196 and thus relative to the actuating lever 122 is prevented.

When the end 212 of the locking pin 196 is pulled towards the actuating lever handle body 120 , the locking pin 196 is pivoted against the pull of the tension coil spring 206 into the unlocking position shown in FIG. 12. In this unlocking position, the locking pin 196 does not interact with the locking surface 138 of the step 137 or locking surface 142 of the groove 140 of the comb 136 of the right clamping member 126 b, so that a pivoting movement of the clamping members 126 relative to the locking pin 196 and thus relative to the actuating lever 122 is possible.

Otherwise, the sixth embodiment of the tensioning is correct direction regarding structure and function with the above fourth embodiment described.

A seventh embodiment of a tensioning device shown in FIG. 13 is also designed as a vertical tensioner and differs from the third embodiment described above with regard to the type of locking element used and the unlocking device.

As a locking element is used in the seventh embodiment form a locking screw 214 , which passes through an elongated hole 216 in the left lever arm 118 a of the operating lever 122 and into a threaded hole 218 of a rocker 220 on the outside of the left lever arm 118 a of the operating lever 122 is screwed in. The rocker 220 is mounted on the left lever arm 118 a by means of a bearing pin 222 so that it can be pivoted in a plane perpendicular to the central plane 114 of the clamping device 100 .

The bearing pin 222 passes through a through hole 224 arranged in the rocker 220 between the threaded hole 218 and the rocker grip body 168 and a through hole 226 in the left lever arm 118 a and is in a guide hole 228 in the right lever arm 118 b of the actuating lever 122 perpendicular to the central plane 114 slidably mounted. The bearing pin 222 is provided at its left end (shown on the right in the front view in FIG. 13) which projects beyond the passage opening 224 in the rocker 220 with an annular collar 230 which prevents the bearing pin 222 from falling out of the passage opening 224 prevented. Furthermore, the bearing pin 222 is provided in its region between the two lever legs 118 of the actuating lever 122 with a further collar 232 on which one end of a Druckspi ralfeder 170 is fixed, the spiral axis of which extends perpendicularly to the central plane 114 and which extends at the other Ren end is supported on the inside of the left lever arm 118 a.

The rocker 220 is formed at an angle in the area of the through opening 224 .

If no counterforce acts on the rocker handle body 168, the compression coil spring 170 presses the bearing pin 222 towards the right lever arm 118 b. The rocker 220 is pressed by the annular collar 230 against the outside of the left lever arm 118 a that it lies flat against the same. In this position of the rocker 220 , the locking screw 214 is in the locking position shown in FIG. 13 Darge, in which the locking thread pin 214 with the locking surface 138 of the step 137 or locking surface 142 of the groove 140 of the comb 136 of the left Tension member 176 a cooperates so that a pivoting movement of the tension members 176 relative to the locking screw 214 and thus relative to the actuating lever 122 is prevented.

If the rocker switch body pulled toward the actuating lever handle body 120 through 168, it is the end of the rocker 220 which carries the latch-threaded pin 214, leg 118 a pivoted against the urging force of the compression coil spring 170 of the outside lever of the left, wherein the bolt-threaded pin 214 is moved through the elongated hole 216 in its unlocked position.

In this unlocked position, the locking screw 214 is no longer in contact with the locking surface 138 of the step 137 or the locking surface 142 of the groove 140 of the comb 136 of the left tendon 176 a, so that a pivoting movement of the tendons 176 relative to the locking threaded pin 214 and is therefore possible relative to the actuating lever 122 .

Otherwise, the seventh embodiment of the tensioning is correct direction regarding structure and function with the above described third embodiment.

An eighth embodiment of a tensioning device shown in FIGS . 14 to 17 is formed as a horizontal tensioner, ie the actuating lever is in the tensioned position, which is shown in FIG. 14 in solid lines, substantially parallel to the support surface of the base Alignment of the base on a horizontal surface is essentially horizontal. The position of the elements of the tensioning device in the relaxed position of the actuating lever is shown in broken lines in FIG. 14 and in FIG. 15.

The clamping device designated as a whole with 300 comprises a base 302 , which comprises a left foot 304 a and a right th foot 304 b. Each of the feet 304 a, 304 b has the shape of an angle, one leg of the angle forming a base plate 306 and the other leg forming a support plate 308 .

The underside of each base plate 306 serves as a support surface 310 with which the clamping device 300 can be placed on a base, for example a workbench. Each of the base plates 306 is penetrated perpendicularly to the support surface 310 by through holes 312 which serve to receive fastening means, for example screws, for fixing the base 302 to a base.

The feet 304 a and 304 b of the base 302 are arranged rela tively to one another in such a way that their carrier plates 308 abut one another and are aligned symmetrically with respect to a center plane of the clamping device 300, which is denoted by 314 .

In the following, those pages are the elements of the clamping device 300 of the chuck face 300 of the midplane 314, be as the inner sides of these elements is distinguished, while those sides of the elements of the clamping device 300, which are turned away 314 of the mid-plane than the outer sides thereof be designated.

On the outside of each support plate 308 , a tendon 326 is articulated to the base 302 by means of a first joint 316 , the tendon arranged to the left of the central plane 314 (shown in the plan views of FIGS. 16 and 17 below the central plane 314 ) fol lowing as the left tendon 326 a and the right of the center plane 314 arranged (in the plan views of FIGS. 16 and 17 therefore drawn above the middle plane 314 ) tendon is hereinafter referred to as the right tendon 326 b.

On the inner sides of the free ends of the tendons 326 facing away from the first joint 316 , a lever leg 318 is articulated on the respective tendon 326 by means of a second joint 324 .

The two lever legs 318 abut one another and are surrounded at their free ends by an actuating lever handle body 320 , for example made of plastic. The two lever legs 318 form together with the actuating lever handle body 320 an actuating lever 322 of the direction 300 Spannvor.

On the outside of each lever arm 318 , one arm arm 330 is deflected to the actuating lever 322 by means of a third joint 328 spaced apart from the second joint 324 .

Further, each of the arm segments is the base 302 disposed 330 on the outside of each weils a support plate 308 by means of a above the first joint 316 and is hinged by the third hinge 328 spaced fourth articulation 332 to the base 302nd

The two arm legs 330 are parallel to each other angeord net and bent to their free ends towards the outside, so that together they form a fork-shaped clamping arm 334 of the clamping device 300 .

On the clamping arm 300 , as shown in FIG. 14, a height-adjustable pressure piece 333 can be displaceably guided to transmit a clamping force to a clamped workpiece.

The hinge axes of the first to fourth joints 316 , 324 , 328 and 332 are aligned parallel to one another, so that the actuating lever 322 , the tensioning members 326 and the tensioning arm 334 are each pivotable in parallel to the center plane 314 aligned pivot planes.

The actuating lever 322 forms, together with the tension members 326, a toggle lever, the second joint 324 serving as the knee joint of the toggle lever. In the clamping position shown in solid lines in FIG. 14, this toggle lever is essentially stretched, ie, the lever arms of the toggle lever, namely the region of the actuating lever 322 arranged between the second joint 324 and the third joint 328 , and each between the second joint 324 and the first joint 316 arranged areas of the tendons 326 are aligned substantially parallel to each other.

In the relaxation position shown in FIG. 15, the toggle lever is angled, ie the lever arms of the toggle lever are aligned transversely to one another.

The left tendon 326 a and the right tendon 326 b are not symmetrical to each other. Rather, the left tendon 326 a on its rounded joint adjacent to the second joint 324 be a chimney 336 along its circumference, which the right tendon 326 b lacks.

The comb 336 has a rear step 337 with a blocking surface 338 oriented perpendicular to the central plane 314 . Furthermore, the chimney 336 has a front step 340 with a blocking surface 342 oriented perpendicular to the central plane 314 . The rear step 337 and the front step 340 of the comb 336 are arranged at an angular distance of slightly more than 90 ° with respect to the axis of the second joint 324 .

The rear step 337 and the front step 340 of the comb 336 interact in a locking position shown in FIG. 16 with a locking element in the form of a pawl 344 which extends substantially perpendicular to the central plane 314 . The pawl 344 is substantially in the form of a U and is guided in the actuating lever 322 ver slidably through a lever arm 318 of the actuating lever 322 penetrating first guide hole 346 and one between the first guide hole 346 and the actuating lever handle body 320 arranged, also both He lever leg 318 of the actuating lever 322 penetrating second guide hole 347 , wherein a short leg 349 of the U-shaped pawl 344 in the first guide hole 346 and a long leg 351 of the U-shaped pawl 344 are guided in the second guide hole 347 .

The inside of the short leg 349 and long leg 351 of the latch 344 interconnecting intermediate portion 353 of the U-shaped pawl 344 forms a stop surface 350 of the pawl 344th

In a region of the long leg 351 which projects beyond the outside of the actuating lever 322 , the pawl 344 is provided with a recess 354 through which a pawl neck 356 is formed in the pawl 344 . In the area of the clin kenhalses 356, the pawl 344 penetrates a Durchgangsöff opening 358 in a rocker 360 , which is arranged to the left of the actuating lever 322 and is mounted on the third joint 328 so that the rocker 360 in a to the central plane 314 essentially vertical plane is pivotable relative to the actuating lever 322 . The mounting of the rocker 360 on the third joint 328 takes place in that the articulated pin 362 of the third joint 328 projects at its left end beyond the arm leg 330 of the tensioning arm 334 , a through hole 364 engages in the rocker 360 and at its left end is provided with an annular collar 366 , which prevents the rocker 360 from sliding off the pivot pin 362 .

The rocker 360 is hen at its free end with a rocker handle body 368 , for example made of plastic, verses. This rocker handle body 368 serves as a control element for manual actuation of the rocker 360 .

Furthermore, one end of a compression coil spring 370 is fixed to the rocker 360 , which surrounds the pawl 344 and whose spiral axis is oriented essentially perpendicular to the central plane 314 . With its other end the compression coil spring 370 to the left lever 360 adjacent leg 318 a of the operation lever 322 set the rocker, so that the compression coil spring 370, the rocker 360 clamped against the actuating lever 322nd

If no counterforce acts on the rocker handle body 368 , the compression coil spring 370 pushes the rocker 360 away from the actuation lever 322 , as a result of which the pawl 344 coupled to the rocker 360 is brought into the locking position shown in FIG. 16. The pivoting movement of the rocker 360 and the rectilinear motion of the coupled to the rocker 360 pawl 344 are through the intermediate piece 353 of the pawl 344 be excluded, whose stop face 350 b in the locking position on the outer side of the right lever leg 318 of Actuate the applied supply lever 322nd

If, as in Fig. 14 Darge in solid lines, det befin in the clamped position 322 of the operating lever, the pawl 372 of the pawl 344 acts in the locking position 344 a 344 disposed Rie to the short leg 349 of the latch yellow rich so with the rear step 337 of the comb 336 of the left tendon 326 a together that a relative movement between the left tendon 326 a and the pawl 344 is prevented. Since the pawl 344 is guided in the actuation lever 322 , a relative movement between the tendons 326 and the actuating lever 322 is prevented. Thus, the opening angle of the clamping members 326 and the operating lever 322 existing knee lever can not be changed, so that the operating lever 322 , the clamping arm 334 and the base 302 are fixed relative to one another in their position. The actuating lever 322 is thus locked in its position relative to the base 302 by the interaction of the pawl 344 with the left clamping member 326 a.

.. The transition of the clamping device 300 of the embodiment shown in Figure 14 in solid lines clamping position of the supply Actuate the lever 322 into the position shown in Figure 15 relaxation position of the operating lever 322 is accomplished as follows:
By manually actuating the rocker handle body 368 , the rocker 360 is pivoted toward the actuating lever 322 against the pressure force of the compression coil spring 370 . The pawl 344 coupled to the rocker 360 is moved in a direction perpendicular to the central plane 314 from the locking position shown in FIG. 16 into the unlocking position shown in FIG. 17.

In this unlocked position, the short leg 349 of the pawl 344 is no longer the rear step 337 of the comb 336 of the left locking member 326 a, so that in the unlocking position of the pawl 344, the tendons 326 about the second joint 324 ge relative to the actuating lever 322 can be pivoted.

The actuating lever 322 can therefore be pivoted (counterclockwise in the side view of FIG. 14) from the tensioned position into the relaxed position.

As soon as the operating lever 322 has left the clamping position, no more force has to act on the rocker handle body 368 , since the chimney 336 of the left clamping member 326 a with the left end of the short leg 349 in all intermediate positions between the clamping and the unclamping position of the operating lever 322 the pawl 344 cooperates that a back movement of the pawl 344 is prevented in the locking position.

The pawl 344 is, during the pivoting movement of the actuator thus held by the comb 336 of the left clamping member 326 a lever 322 in the unlocking position until by the pivotal movement of the left clamping member 326 a to the second joint 324 to the pawl 344, the front stage relative 340 left tendon 326 a the left end of the short leg 349 of the pawl 344 is opposite. In this position, the movement of the pawl 344 perpendicular to the central plane 314 is released, so that the pawl 344 is moved from the unlocking position back to the locking position due to the action of the compression coil spring 370 . The choice of the angular distance between the rear step 337 and the step 340 in front of the step 336 of the comb 336 of the left tendon 326 a ensures that the movement of the pawl 344 will then release when the actuating lever 322 shows the relaxation position shown in FIG reached. As a result, it is sufficient that the actuating lever 322 is automatically locked in the relaxation setting and an unintentional closing of the tensioning device 300 is excluded.

In order to ensure proper functioning of the locking of the actuating lever 322 even after repeated use of the clamping device 300 , the short leg 349 of the pawl 344 is designed such that it is in the locking position of the pawl 344 (see FIG. 16) on the outside of the left tendon 326 a survives. This ensures that the pawl 344 can still work together over the entire width of the locking surface 338 with the rear step 337 or over the entire width of the locking surface 342 with the front step 340 of the comb 336 of the left tendon 326 if the short leg 349 of the pawl 344 is shortened due to edge wear due to the reciprocating movement of the pawl 344 from the locking position to the unlocking position and back.

The arrangement of the rocker handle body 368 adjacent to the loading tätigungshebel 322 in the immediate vicinity of betae operating lever handle body 320, it is possible to release the lock of the operating lever 322 in the clamping position with the operating lever 322 surrounds hand without the Be tätigungshebel release 322 or another hand to help. Due to the convenient arrangement of the actuating lever handle body 320 and the rocker handle body 368 , the tensioning device 300 can be actuated by one-hand operation from the right or left, from the front or rear, in an inclined position or in an overhead position.

The secure latching of the pawl 344 in the locking position can be clearly recognized and felt by the pivoting movement of the rocker 360 associated therewith.

Since the movement of the pawl 344 acting as a locking element from the locking position in the unlocking position is substantially perpendicular to the loading direction, the locking of the actuating lever 322 is released even when overloaded only when the tensioning device 300 is destroyed.

A ninth embodiment of a tensioning device shown in FIG. 18 is also designed as a horizontal tensioner and differs from the eighth embodiment described above only in terms of the design of the tensioning members, the pawl and the unlocking device for the pawl.

As can be seen from FIG. 18, in the ninth embodiment, the two tendons have been interchanged with one another in relation to the eighth embodiment, ie the right tendon 376 b (shown in the top view of FIG. 18 above) of the ninth embodiment corresponds to its own Structure with chimney 336 , rear step 337 and in front of which step 340 the left tendon 326 a of the eighth embodiment, while the left tendon (drawn in the plan view of FIG. 18 below) 376 a of the ninth embodiment form in terms of its construction the right tendon 326 b corresponds to the eighth embodiment.

The pawl 378 of the ninth embodiment differs from the pawl 344 of the eighth embodiment in that the pawl 378 of the ninth embodiment does not have the shape of a U but the shape of an L with a long leg 351 oriented perpendicular to the center plane 314 and one parallel to the Has center plane 314 aligned short leg 355 . The inside of the short leg 355 bi 35581 00070 552 001000280000000200012000285913547000040 0002019714861 00004 35462ldet a stop surface 350 of the pawl 378 b in the position shown in Fig. 18 the locking position of the pawl 378 on the outer side of the right lever arm 318 of the actuator abuts lever 322nd Characterized act in the ninth exporting the jig approximate shape, the short leg 355 of the latch 378 and the right clamp member 376 b together to the operating lever 322 to lock in the tension or relaxation position.

Furthermore, the ninth embodiment of the tensioning device has no rocker. Instead, the pawl 378 of the ninth embodiment is provided with a push button 380 at its left end (shown at the bottom in the plan view of FIG. 18). The compression spring 370 surrounding the pawl 378 is fixed in the ninth embodiment on the one hand on the outside of the left arm leg 318 a of the actuating lever 322 and on the other hand on the inside of the push button 380 .

In the ninth embodiment, the push button 380 serves as an actuating element for the unlocking device of the pawl 378 .

If no pushing force is exerted on the push button 380 , the pressure coil spring 370 presses the push button 380 and thus the pawl 378 rigidly connected to the push button 380 into the locking position of the pawl 378 shown in FIG. 18.

By manually pressing the push button 380 against the pressure force of the compression coil spring 370 , the pawl 378 rigidly connected to the push button 380 can be moved from the locking position into the unlocking position (not shown), in which the short leg 355 of the pawl 378 no longer has the blocking surface 338 the rear step 337 or the locking surface 342 of the front step 340 of the ridge 336 of the right tendon 376 b opposite, so that a pivoting movement of the tendons 376 relative to the pawl 378 and thus relative to the actuating lever 322 is no longer blocked.

The push button 380 is arranged in the access region of the Actuate the supply lever handle body 320 hand gripping, so that the push button 380 with a finger, preferably the thumb, of that hand may be operated without the hand must be detached from the operating lever handle body 320th

Otherwise, the ninth embodiment of the instep is correct direction regarding structure and function with the above described eighth embodiment.

The trained in connection with the vertical tensioner The first to seventh embodiments of the tensioning device device described embodiments of the locking element and the unlocking device can also be used as a scale right-hand tensioners trained who used the.

A in FIGS. 19 to 21 shown in ten exporting approximate shape of a clamping device is designed as a shutter release, that is, the tension arm carries at its free end a clamping hook, for example, for engaging behind a Ver closing bolt in the clamping position, shown in FIG. 19 in solid lines is shown. The position of the elements of the tensioning device designed as a locking tensioner in the relaxed position of the actuating lever is shown in broken lines in FIG. 19.

The clamping device designated as a whole with 500 comprises a base 502 which comprises a left foot 504 a and a right th foot 504 b. Each of the feet 504 a, 504 b has the shape of an angle, one leg of the angle forming a base plate 506 and the other leg forming a support plate 508 .

The underside of each base plate 506 serves as a support surface 510 with which the clamping device 500 can be placed on a base, for example a workbench. Each of the base plates 506 is penetrated perpendicularly to the support surface 510 by through-holes 512 which serve to receive fastening means, for example screws, for fixing the base 502 to a base.

The feet 504 a and 504 b of the base 502 are arranged in such a way from one another that their carrier plates 508 are aligned parallel to one another and parallel to a central plane of the clamping device 500 , designated 514 .

In the following, those pages are the elements of the clamping device 500 of the chuck face 500 of the midplane 514, be as the inner sides of these elements is distinguished, while those sides of the elements of the clamping device 500, which are turned away 514 of the mid-plane than the outer sides thereof be designated.

A lever arm 518 is articulated on the base 502 on the outside of each carrier plate 508 by means of a first joint 516 . The free ends of the lever legs 518 are bent symmetrically to the central plane 514 of the tensioning device 500 inwards so that they abut one another and surrounded by egg nem, for example made of plastic, actuating lever handle body 520 . The two lever legs 518 together with the operating lever handle body 520 form an operating lever 522 of the tensioning device 500 .

By means of a second joint 524 arranged between the first joint 516 and the actuating lever handle body 520 , a clamping arm 534 arranged between the lever legs 518 of the actuating lever 522 is articulated on the actuating lever 522 . The free end of the clamp arm 534 is formed as a clamping hook 535 that is mounted in the position shown in Fig. 19 in solid line clamping position of the actuating lever 522, for example, a (drawn in Fig. 19 in broken lines) in a bearing block 539 bearing pin can engage behind the 541st

The joint axes of the first joint 516 and the second Ge joint 524 are aligned parallel to one another, so that the actuating lever 522 and the clamping arm 534 are pivotable in the central plane 514 .

The left foot 504 a and the right foot 504 b of the base 502 are not symmetrical to each other. Rather, the right foot 504 b along the circumference of its support plate 508 egg nen comb 536 , which the left foot 504 a is missing.

The comb 536 has at its edge a rear groove 537 which runs axially to the axis of the first joint 516 and has a locking surface 538 which is directed essentially radially to the axis of the first joint 516 . Furthermore, the chimney 536 at its edge to an axially extending to the axis of the first articulation 516 proximal groove 540 having a surface oriented substantially radially to the axis of the first hinge 516 locking 542nd The rear groove 537 and the front groove 540 of the comb 536 are arranged at an angular distance of, for example, approximately 160 ° with respect to the axis of the first joint 516 .

The rear groove 537 and the front groove 540 of the comb 536 interact in a locking position shown in FIG. 20 with a locking element in the form of a pawl 544 which extends substantially perpendicular to the central plane 514 . The pawl 544 is slidably guided in the actuating lever 522 through a respective guide hole 546 provided in each of the lever leg 518 of the actuating lever 522 , the guide holes 546 in the lever limb 518 being arranged between the first joint 516 and the second joint 524 .

The pawl 544 has at its right end (shown in the plan view of FIGS. 20 and 21 above the central plane 514 ) a stop lug 548 , the inside of which faces the central plane 514 forms a stop surface 550 . In addition, the pawl 544 has an unlocking recess 552 on its edge facing the first joint 516 . On the same edge, near its left end (shown in the plan view of FIGS . 20 and 21 below the central plane 514 ), the pawl 544 has a further recess 554 , through which a pawl neck 556 is formed in the pawl 544 .

The pawl 544 engages in the region of the pawl neck 556, a through opening 558 in a rocker 560 , which is arranged on the left ne ben of the actuating lever 522 and is mounted on the first link 516 so that the rocker 560 in a plane 514 essentially perpendicular to the central plane is pivotable relative to the operating lever 522 . The mounting of the rocker 560 on the first joint 516 takes place in that the pivot pin 562 of the first joint 516 protrudes beyond the left lever arm 518 a of the actuating lever 522 at its left end, engages through hole 564 in the rocker 560 and on its left End is provided with an annular collar 566 , which prevents the rocker 560 from sliding off the pivot pin 562 .

The rocker 560 is hen at its free end with a rocker handle body 568 , which is made of plastic, for example. This rocker handle body 568 is used as an actuating element for manual actuation of the rocker 560 .

Between the through opening 558 and the rocker handle body 568 , the rocker 560 is penetrated by a guide opening 567 , which (over the outside of the left lever leg 518 a of the actuating lever 522 projecting) engages through the pivot pin 569 of the second joint 524 . The additional guidance of the rocker 560 on the pivot pin 569 gives the rocker 560 an improved hold and allows a more precise execution of the pivoting movement of the rocker 560 relative to the actuating lever 522 .

Further, one end of a compression coil spring 570 is fixed to the rocker 560, the operating lever surrounding the between the rocker 560 and the betae 522 disposed region of the pivot pin 569 and whose spiral axis is aligned substantially perpendicular to the center plane 514th With its other end, the compression coil spring 570 on the rocker arm 560 adjacent left lever arm 518 a of the actuating lever 522 festge sets, so that the compression coil spring 570 braces the rocker 560 against the actuating lever 522 .

Characterized in that the point of application of the compression coil spring 570 on the rocker 560 is further from the pivot axis of the rocker 560 ent than the coupling point of the pawl 544 on the rocker 560 , the compressive force of the compression coil spring 170 , which is required to the pawl 544 in the in Fig. 20 Darge presented locking position to move and hold there, reduced.

If no counterforce acts on the rocker handle body 568 , the compression coil spring 570 presses the rocker 560 away from the actuation lever 522 , as a result of which the pawl 544 coupled to the rocker 560 is brought into the locking position shown in FIG. 20. The pivoting movement of the rocker 560 and the straight line movement of the pawl 544 coupled to the rocker 560 are thereby limited by the stop lug 548 of the pawl 544 , the stop surface 550 in the locking position on the outside of the right lever arm 518 b of the actuating lever 522 .

If, as shown in Fig. 20, the operating lever is in the clamped position 522, is effective at the Verrie gelungsstellung of the pawl 544 between the Entriege lungsausnehmung 552 of the pawl 544 and the stop lug 548 of the latch 544 disposed locking region 572 of the pawl 544 so with the locking surface 538 of the rear groove 537 of the ridge 536 of the right foot 504 b together that a relative movement between the right foot 504 b and the pawl 544 is prevented. Since the pawl 544 is guided in the operating lever 522 , this prevents relative movement between the base 502 and the operating lever 522 . The actuating lever 522 is thus locked in its position relative to the base 502 by the interaction of the pawl 544 with the right foot 504 b.

.. The transition of the clamping device 500 from the supply of Actuate the lever 522 performs in Fig clamping position shown in solid lines 19 in the question asked at Figure 19 in broken lines represents relaxation position of the actuating lever 522 as follows:
By manual actuation of the rocker handle body 568 , the rocker 560 is pivoted toward the actuating lever 522 against the pressure force of the compression coil spring 570 . The pawl 544 coupled to the rocker 560 is moved in a direction perpendicular to the central plane 514 from the locking position shown in FIG. 20 into the unlocking position shown in FIG. 21.

In this unlocked position, the locking surface 538 of the rear groove 537 of the ridge 536 of the right foot 504 b faces the unlocking recess 552 in the pawl 544 , so that in the unlocked position of the pawl 544 the actuating lever 522 about the first joint 516 relative to the base 502 can be pivoted.

The actuating lever 522 can therefore be pivoted (counterclockwise in the side view of FIG. 19) from the tensioned position into the relaxed position.

As soon as the operating lever 522 has left the clamping position, no more force has to act on the rocker handle body 568 , since the chimney 536 of the right foot 504 b with the right edge of the unlocking recess 552 in all intermediate positions between the clamping and the unclamping position of the operating lever 522 the pawl 544 cooperates so that a back movement of the pawl 544 is prevented in the locking position.

The pawl 544 is thus held by the comb 536 of the right foot 504 b during the pivoting movement of the actuating lever 522 in the unlocked position until the front groove 540 of the comb 536 of the right foot 504 b the by the pivoting movement of the actuating lever 522 about the first joint 516 right edge of the unlocking recess 552 is opposite. In this position, the movement of the pawl 544 perpendicular to the central plane 514 is released, so that the pawl 544 is moved from the unlocking position back to the locking position due to the action of the compression coil spring 570 . The choice of the angular distance between the rear groove 537 and the front groove 540 of the comb 536 ensures that the movement of the pawl 544 will then release when the actuating lever 522 reaches the relaxation position shown in broken lines in FIG. 19. This ensures that the actuating lever 522 is automatically locked in the relaxation position and inadvertent closing of the tensioning device 500 is closed.

The locking area 572 of the pawl 544 is designed such that it projects in the locking position of the pawl 544 (see FIG. 20) over the inside of the right foot 504 b to the center plane 514 . This ensures that the pawl 544 over the entire width of the locking surface 538 with the rear groove 537 or over the entire width of the locking surface 542 with the front groove 540 of the ridge 536 of the right foot 504 b can interact when the unlocking recess 552 is enlarged due to edge wear due to the reciprocating movement of the pawl 544 from the locking position into the unlocking position and back at the expense of the locking region 572 .

The arrangement of the rocker handle body 568 adjacent to the loading tätigungshebel 522 in the immediate vicinity of betae operating lever handle body 520, it is possible to release the lock of the operating lever 522 in the clamping position with the operating lever 522 surrounds hand without the Be tätigungshebel release 522 or another hand to help. Due to the convenient arrangement of the actuating lever handle body 520 and the rocker handle body 568 , the tensioning device 500 can be actuated by one-hand operation from the right or left, from the front or rear, in an inclined position or in an overhead position.

The secure latching of the pawl 544 in the locking position can be clearly recognized and felt by the pivoting movement of the rocker 560 associated therewith.

Since the movement of the pawl 544 acting as a locking element from the locking position in the unlocking position is essentially perpendicular to the loading direction, the locking of the actuating lever 522 is only released even when overloaded when the tensioning device 500 is destroyed.

An eleventh embodiment shown in FIGS. 22 to 24 of a tensioning device is also designed as a locking mechanism and differs from the tenth embodiment described above with regard to the type of locking and the unlocking device for the locking element.

As can be seen from FIGS. 22 to 24, the eleventh embodiment of the tensioning device has neither a pawl acting as a locking element nor a unlocking device comprising a rocker.

Instead, a latch 581 arranged laterally ben the left foot 504 a is used as a locking element. The trap 581 is mounted on the left foot 504 a by means of a bearing pin 583 in such a way that it can be pivoted in a plane perpendicular to the central plane 514 of the tensioning device 500 . In the eleventh embodiment, the two feet 504 a, 504 b are formed symmetrically to one another and have no crest with grooves.

The bearing pin 583 passes through a through hole 624 arranged at a lower end of the trap 581 and a first guide hole 626 in the left foot 504 a and a second guide hole 628 in the right foot 504 b, the guide holes 626 and 628 below the first joint 516 are arranged.

The bearing journal 583 carries at its left end (in the front views of FIGS . 23 and 24 drawn on the right) an annular collar 630 , and the catch 581 has on its outside a through-opening 624 which surrounds the recess 632 which receives the annular Federal 630 of the journal 583 is provided.

At its (in the front views of FIGS . 23 and 24 left drawn) right end of the bearing pin 583 carries a push button 634 , which serves as an actuating element for the unlocking device of the eleventh embodiment of the tensioning device. On the inside of the push button 634 one end of a compression coil spring 570 is fixed, the spiral axis of which is oriented perpendicular to the central plane 514 of the clamping device 500 and the other end of which is supported on the outside of the right foot 504 b.

The trap 581 has at its upper end a locking lug 636 protruding toward the central plane 514 . If no counterforce is exerted on the push button 634 , the pressure coil spring 570 presses the push button 634 and thus the bearing journal 583 rigidly connected to the push button 634 to the left, so that the collar 630 engages in the recess 632 of the latch 581 and thereby the latch 581 Moved into the locking position shown in Fig. 23, in which the latch 581 in a region surrounding the through hole 624 rests on the inside of the left foot 504 a and the latch 636 of the latch 581 the left lever arm 518 a of the actuating lever 522 spreads.

In this locking position, the left lever leg 518 a of the actuating lever 522 and the latch 636 of the latch 581 act together so that the actuating lever 522 cannot be pivoted about the first joint 516 relative to the base 502 . The operating lever 522 is thereby locked in position relative to the base 502 .

By manually pressing the push button 634 against the pressing force of the compression coil spring 570 , the bearing pin 583 can be moved to the left so that the latch 581 is no longer pressed against the outside of the left foot 504 a and pivots into the unlocking position shown in FIG. 24. In this unlocked position, the locking lug 636 of the trap 581 no longer engages the left lever arm 518 a of the actuating lever 522 , so that the actuating lever 522 can be pivoted about the first joint 516 from the clamping position into the relaxation position.

Otherwise, the eleventh embodiment of the tensioning device is correct tion regarding structure and function with the above be described tenth embodiment.

In order to prevent an undesirable rotation of the trap 581 around the bearing pin 583 , it can be provided that the bearing pin 583 in the area penetrating the through opening 624 of the case 581 has a non-rotationally symmetrical cross section, for example the cross section of a square or double flat. The shape of the cross section of the through hole 624 is adjusted accordingly in this case the shape of the cross section of the journal 583rd

Furthermore, to prevent undesirable rotation of the latch 581 around the bearing pin 583, it can be provided that the latch 581 carries on its inside a guide pin which is guided in a guide hole in the left foot 504 a.

A twelfth embodiment of a tensioning device shown in FIG. 25 is also designed as a locking tensioner and differs from the eleventh embodiment described above only in terms of the type of locking element used.

As seen from Fig. 25, in the twelfth exporting the jig approximate shape as a locking element, instead of a pivotally coupled to the pivot pin 583 applies ver case a rigidly connected to the bearing pin 583 latch 638th The pawl 638 carries a locking lug 636 at its upper end.

If no counterforce is exerted on the push button 634 , the pressure coil spring 570 presses the push button 634 and thus the pawl 638 rigidly connected to the push button 634 into the locking position of the pawl 638 shown in FIG. 25, in which the detent 636 the left lever arm 518 a of Be tätigungshebels overlaps 522 and thereby locks the actuating lever 522 in the clamping position.

By manually pressing the push button 634 against the pressure force of the compression coil spring 570 , the pawl 638 rigidly connected to the push button 634 can be moved from the locking position into the unlocking position (not shown), in which the detent 636 is no longer the left lever arm 518 a of the actuating lever 522 engages and thus the actuating lever 522 can be pivoted from the tensioning into the relaxation position.

Otherwise, the twelfth embodiment of the Spannvor direction regarding structure and function with the above described eleventh embodiment.

A thirteenth embodiment of the tensioning device shown in FIG. 26 is also configured as a locking tensioner and differs from the twelfth embodiment described above with regard to the design of the pawl used as a locking element.

As can be seen from FIG. 26, the pawl 638 used in the thirteenth embodiment of the tensioning device does not carry a latching lug overlapping the actuating lever 522 , but instead a latching lug 636 which, in the locking position of the pawl 638 shown in FIG. 26, in one on the outside of the left lever arm 518 a of the actuation lever 522 provided engagement recess 640 engages so that the actuating lever 522 is locked in its tensioned position.

Otherwise, the thirteenth embodiment of the instep is correct device with regard to structure and function with the previous one described twelfth embodiment.

A fourteenth embodiment shown in Fig. 27 of the tensioning device is also ausgebil det as a closure clamp and differs from the thirteenth embodiment described above in terms of the type of locking element used.

As can be seen from FIG. 27, in the fourteenth embodiment, no locking element which can be displaced by means of a push button is used, but instead a leaf spring 642 arranged on the outside of the left foot 504 a and the left lever leg 518 a, which at its upper end carries an elastic tongue 644 protruding toward the center plane 514 of the tensioning device 500 and an outwardly angled grip area 646 .

The leaf spring 642 is by means of a through hole 650 in the leaf spring 642 and one of the through holes 512 in the base plate 506 of the left foot 504 a penetrating fastening element 648 , for example a screw, which also defines the left foot 504 a on a (not shown ) Pad serves, at the top of the base plate 506 of the left foot 504 a fixed.

The leaf spring 642 is tensioned against the actuating lever 522 before that in the locking position shown in FIG. 27, in which no opposing force acts on the grip region 646 , it bears against the outside of the left lever arm 518 a of the actuating lever 522 , the elastic Tongue 644 overlaps the left lever arm 518 a of the actuating lever 522 , so that the actuating lever 522 is locked in its tensioned position.

If the leaf spring 642 is pivoted away from the actuating lever 522 by exerting a force on the grip area 646 , the elastic tongue 644 engages over the left lever arm 518 a of the actuating lever 522 no longer, so that the actuating lever 522 is pivoted from the tensioning position into the relaxed position can.

If the operating lever 522 is pivoted from its relaxed position into the clamping position, the underside of the left lever leg 518 a of the operating lever 522 presses the elastic tongue 644 of the leaf spring 642 outwards, so that the operating lever 522 can get into the clamping position. When the operating lever 522 has reached the clamping position, the leaf spring 642 pivots back into the locking position shown in FIG. 27, so that the operating lever 522 is automatically locked in the clamping position.

Otherwise, the fourteenth embodiment of the instep is correct device with regard to structure and function with the previous one described thirteenth embodiment.

A five tenth embodiment of the tensioning device shown in FIG. 28 is also configured as a locking tensioner and differs from the fourteenth embodiment described above with regard to the type of locking element used.

As can be seen from FIG. 28, the actuating lever 522 in the fifteenth embodiment is not locked in the tensioned position by means of a leaf spring, but rather by means of a spring pin 652 .

The spring pin 652 has a straight long pin end 654 , which is shown in FIG. 28. Locking position perpendicular to the central plane 514 of the clamping device 500 extends through guide holes 655 provided in the lever legs 518 and the carrier plates 508 of the feet 504 . Furthermore, the spring pin 652 has a curved short pin end 656 which, in the locking position shown in FIG. 28, resiliently encompasses the upper side of the right lever arm 518 b of the actuating lever 522 . By the spring tension between the pin ends 654 and 656 , the spring pin 652 is secured against unintentional falling out of the guide holes 655 .

The long pin end 654 acts as a locking element that prevents a pivoting movement of the operating lever 522 relative to the feet 504 and thus locks the operating lever 522 in its tensioned position.

To unlock the actuating lever 522 , the spring pin 652 is pulled out of the guide holes 655 in a direction perpendicular to the central plane 514 of the tensioning device 500 .

Otherwise, the five tenth embodiment of the instep is correct device with regard to structure and function with the previous one described fourteenth embodiment.

A sixteenth embodiment of a tensioning device shown in FIG. 29 is also configured as a locking tensioner and differs from the fifteenth embodiment described above only in terms of the type of spring pin used.

As seen from Fig. 29, in the sixteenth exporting the jig approximate shape a spring pin 658 is used, the no short pin end 656, but only a gekrümm tes long pin end 654 having the holes through the guide 655 in the feet 504 and the lever arms 518 of the actuating lever 522 is guided and, by virtue of its curvature, secures the spring pin 658 against inadvertent falling out of the guide holes 655 .

Otherwise, the sixteenth embodiment of the instep is correct device with regard to structure and function with the previous one described fifteenth embodiment.

Claims (32)

1. A tensioning device, in particular a quick-action tensioning device, comprising a base ( 102 ; 302 ; 502 ), a tensioning arm ( 134 ; 334 ; 534 ) articulated to the base ( 102 ; 302 ; 502 ), an articulated to the base ( 102 ; 302 ; 502 ) and articulated with the tensioning arm ( 134 ; 334 ; 534 ) connected, in a pivoting plane ( 114 ; 314 ; 514 ) pivotable actuating lever ( 122 ; 322 ; 522 ) and a locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ), which locks in a locking position with a locking element ( 126 b; 176 a; 326 a; 376 b; 504 b; 518 a; 502 ; 522 ) is that a relative movement between the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ) and the locking member ( 126 b; 176 a; 326 a; 376 b ; 504 b; 518 a; 502 ; 522 ) prevented and the actuating lever ( 122 ; 322 ; 522 ) is locked in a locking position relative to the base ( 102 ; 302 ; 502 ), and that from the locking position can be moved into an unlocking position, in which the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ) permits movement of the actuation lever ( 122 ; 322 ; 522 ) relative to the base ( 102 ; 302 ; 502 ), the actuation lever ( 122 ; 322 ; 522 ) being actuated by the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ) can be locked in a clamping position, characterized in that the clamping device ( 100 ; 300 ; 500 ) is designed such that the movement of the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ) from the locking position into the unlocking position at least partially in a direction transverse to the pivoting plane ( 114 ; 314 ; 514 ) of the actuating lever ( 122 ; 322 ; 522 ) extending direction it follows. 2. Clamping device according to claim 1, characterized in that the movement of the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ; 652 ; 658 ) from the locking position to the unlocking position substantially perpendicular to the pivot plane ( 114 ; 314 ; 514 ) of the actuating lever ( 122 ; 322 ; 522 ). 3. Clamping device according to one of claims 1 or 2, characterized in that the movement of the locking element ( 144 ; 178 ; 184 ; 344 ; 378 ; 544 ; 638 ; 652 ; 658 ) from the locking position into the unlocking position is essentially a rectilinear movement is. 4. Clamping device according to one of claims 1 or 2, characterized in that the movement of the locking element ( 196 ; 214 ; 581 ; 642 ) from the locking position into the unlocking position essentially a pivoting movement in a transverse to the pivoting plane ( 114th ; 514 ) of the actuating lever ( 122 ; 522 ) aligned plane. 5. Clamping device according to claim 4, characterized in that the locking element ( 581 ) on a bearing element ( 583 ) with a non-rotationally symmetrical cross section, preferably on a square, is mounted. 6. Clamping device according to one of claims 1 to 5, characterized in that the actuating lever ( 122 ; 322 ; 522 ) can be locked in several locking positions. 7. Clamping device according to claim 6, characterized in that the actuating lever ( 122 ; 322 ; 522 ) in the several locking positions by the same locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ) can be locked. 8. Clamping device according to one of claims 1 to 7, characterized in that the actuating lever ( 122 ; 322 ; 522 ) can be locked in a clamping position in which the clamping force which can be transmitted to the clamping arm ( 134 ; 334 ; 534 ) is essentially maximum. 9. Clamping device according to one of claims 1 to 8, characterized in that the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ) in the unlocked position on the clamping device ( 100 ; 300 ; 500 ) is held. 10. Clamping device according to one of claims 1 to 9, characterized in that the clamping device ( 100 ; 300 ; 500 ) is designed such that the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ) is automatically moved into the locking position when the actuating lever ( 122 ; 322 ; 522 ) is pivoted into the locking position. 11. Clamping device according to one of claims 1 to 10, characterized in that the locking element ( 144 ; 178 ; 184 ; 344 ; 378 ; 544 ) is displaceably guided in the actuating lever ( 122 ; 322 ; 522 ). 12. Clamping device according to one of claims 1 to 10, characterized in that the locking element ( 196 ; 214 ) on the actuating lever ( 122 ) is pivotally held. 13. Clamping device according to one of claims 1 to 10, characterized in that the locking element ( 638 ; 652 ; 658 ) is displaceably guided in the base ( 502 ). 14. Clamping device according to one of claims 1 to 10, characterized in that the locking element ( 581 ; 642 ) on the base ( 502 ) is pivotally held. 15. Clamping device according to one of claims 1 to 14, characterized in that the locking element ( 184 ) is movable from the locking position into a plurality of unlocking positions. 16. Clamping device according to claim 15, characterized in that the locking element ( 184 ) is movable in two mutually substantially opposite directions in one unlocking position. 17. Clamping device according to one of claims 1 to 16, characterized in that the actuating lever ( 122 ) by means of at least one clamping member ( 126 ; 176 ) which is articulated on the actuating lever ( 122 ) and on the clamping arm ( 134 ) is connected to the tension arm ( 134 ). 18. Clamping device according to one of claims 1 to 16, as characterized by, that the actuating lever (322) by at least one clamping member (326; 376) which is articulated on the actuating lever (322) is hingedly connected to the base (302) . 19. Clamping device according to one of claims 17 or 18, characterized in that the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ) in the locking position so with the tendon ( 126 b; 176 a; 326 a; 376 b) is locked that the actuating lever ( 122 ; 322 ) is locked in the locking position. 20. Clamping device according to one of claims 1 to 16, characterized in that the actuating lever ( 522 ) on the clamping arm ( 534 ) and on the base ( 502 ) is articulated. 21. Clamping device according to one of claims 1 to 20, characterized in that the locking element ( 544 ) is locked in the locking position with the base ( 502 ) ver that the actuating lever ( 522 ) is locked in the gel position Rie. 22. Clamping device according to one of claims 1 to 20, characterized in that the locking element ( 581 ; 638 ; 642 ; 652 ; 658 ) is locked with the actuating lever ( 522 ) so that the actuating lever ( 522 ) is locked in the locking position . 23. Clamping device according to one of claims 1 to 22, characterized in that the locking element ( 144 ; 184 ; 344 ; 544 ; 581 ; 638 ; 652 ; 658 ) has a locking area ( 172 ; 372 ; 572 ) which in the locking position tion with a locking member ( 126 b; 326 a; 504 b; 518 a) is locked and in the locking position along the direction in which the locking element ( 144 ; 184 ; 344 ; 544 ; 581 ; 638 ; 652 ; 658 ) of the locking position is movable into the unlocking position, over the locking member ( 126 b; 326 a; 504 b; 518 a) survives. 24. Clamping device according to one of claims 1 to 23, characterized in that the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ) with an unlocking device ( 160 ; 174 ; 180 ; 192 ; 360 ; 380 ; 560 ; 583 , 634 ) is coupled, through which the locking element ( 144 ; 178 ; 184 ; 196 ; 214 ; 344 ; 378 ; 544 ; 581 ; 638 ; 642 ) from the locking position to the Ent locking position is movable. 25. Clamping device according to claim 24, characterized in that the unlocking device a along a transverse, preferably perpendicular to the pivoting plane ( 114 ; 314 ; 514 ) of the actuating lever ( 122 ; 322 ; 522 ) extending direction pushing button ( 180 ; 192 ; 380 ; 634 ). 26. Clamping device according to claim 24, characterized in that the unlocking device in a to the pivot plane ( 114 ; 314 ; 514 ) of the actuating lever ( 122 ; 322 ; 522 ) transversely, preferably substantially perpendicular right, aligned pivotable rocker ( 160 ; 174 ; 220 ; 360 ; 560 ). 27. Clamping device according to claim 26, characterized in that the rocker ( 160 ; 174 ; 220 ; 360 ; 560 ) on the actuating lever Be ( 122 ; 322 ; 522 ) is held. 28. Clamping device according to one of claims 26 or 27, characterized in that the rocker ( 160 ; 220 ; 360 ; 560 ) is braced against the actuating lever ( 122 ; 322 ; 522 ) by means of a compression spring ( 170 ; 370 ; 570 ). 29. Clamping device according to one of claims 26 or 27, characterized in that the rocker ( 174 ) is clamped ver by means of egg ner leaf spring against the actuating lever ( 122 ). 30. Clamping device according to one of claims 26 to 29, characterized in that the rocker ( 560 ) by means of the locking element ( 544 ) and a further guide element ( 569 ) on the actuating lever ( 522 ) leads GE. 31. Clamping device according to one of claims 24 to 30, characterized in that the unlocking device comprises an actuating element ( 168 ; 180 ; 192 ; 368 ; 380 ; 568 ) for manual actuation of the unlocking device, which in the access area of the actuating lever ( 122 ; 322 ; 522 ) is arranged. 32. Clamping device according to claim 31, characterized in that the actuating element ( 168 ; 180 ; 192 ; 368 ; 380 ; 568 ) along a transverse to the pivot plane ( 114 ; 314 ; 514 ) of the actuating lever ( 122 ; 322 ; 522 ) fenden direction is offset from the operating lever ( 122 ; 322 ; 522 ).