US 3124223 A
Description (OCR text may contain errors)
March 10, 1964 A. KISOVEC 3,124,223
ADJUSTABLE FRAMEWORK MEMBERS Filed Nov. 23, 1960 5 Sheets-Sheet 1 A. KISOVEC ADJUSTABLE FRAMEWORK MEMBERS March 10, 1964 5 Sheets-Sheet 2' Filed Nov. 25. 1960 March 10, 1964 A. KISOVEC 3,124,223 ADJUSTABLE FRAMEWORK MEMBERS Filed NOV. 33, 1960 5 Sheets-Sheet 3 1/ I I W VII'I/II/IIIIIIIIIIIIIIJ 70v 71 76 ad 59 7 q wzs/vme Eiled Nov. 25, 1960 March 10, 1964 I A KISOVEC 3,124,223
ADJUSTABLE FRAMEWORK MEMBERS 5 Sheets-Sheet 4 da e March 10, 1964 sov c 3,124,223
ADJUSTABLE FRAMEWORK MEMBERS Filed NOV. 25, 1960 5 Sheets-Sheet 5 flit dress The invention concerns an adjustable framework member consisting of two or more telescopically displaceable parts.
in known telescopic framework members one or a plurality of inner support parts are arranged displaceably within bo -shaped or grid-shaped outer carriers. It is known for individual parts of the member to have the cross-section of an equilateral triangle with its base line horizontal and upwardly disposed wherein the two lateral parts of the member merge at their outer ends into a profile with trapezial shaped cross-section. The arrangement is such that the telescopic parts disposed within an external support part abut across their upper surface on the inner face of the upper surface of the outer support.
With supports of this kind provisions are also known for limiting the extent of withdrawal so that the supports on installation are not inadvertently withdrawn from one another or to such an extent that the rigidity suffers.
With telescopic framework members it is furthermore known to arrange tension locks in order to carry out a vertical adjustment of a support. Such tension locks have the disadvantage that they necessitate numerous connection points longitudinally on the casing support which in each case must be individually set. In this way the weight and the price of the support is increased.
The invention is based on the proposition of improving the known telescopic framework member and to pro vide a member which with easier more convenient construction is applicable for bridging over relatively large support widths with a wide range of adjustments as regards its length wherein in a simple manner it is possible to increase the range of adjustment in the particular condition without the necessity for additional arrangements being specially necessary for this purpose on the support.
This problem is solved in accordance with the invention by the feature that at least two parts displaceable within one another of a framework member are guided pivotally in one another and are capable of being fixed at an angular adjustment of the longitudinal axis relative to one another. By the pivotal guiding of the support parts displaceable within one another the angular setting may be undertaken simultaneously with the longitudinal setting whereby a construction is maintained which necessitates a particular angular condition preferably minimum angular position depending on the supporting width. Such a setting is possible with the framework members of the present invention especially also with the construction of the member from only two carrier parts although the invention is not limited to a framework member assembled in this way.
The invention will be described further, by Way of example, with reference to the accompanying drawings, in which:
FIG-1 is a schematic side elevation of a framework member comprising an outer carrier and an inner carrier part.
FIG. 2 is a schematic side elevation of a framework member comprising an outer carrier and an inner carrier part.
FIG. 3 is an enlarged detail view in section showing the engagement between an outer carrier and an inner carrier part.
3,124,223 Patented Mar. 10, 1964 FIG. 4 is a schematic view of a framework member consisting of an outer carrier and two inner carrier parts with a curved construction of the carrier parts.
FIG. 5 is a detail view in section along the line VV in FIG. 3 showing a particular embodiment of the setting screw in combination with a fixing screw.
FIGS. 6, 7 and 8 show particular embodiments of a I setting screw with a fixing screw in combination with an expansible head.
FIG. 9 is a side elevational view in section showing a fixing screw with a pivotal bearer.
FIG. 10 is an enlarged side elevational view in section of the interengagement of a side carrier with an inner carrier part.
FIG. 11 is a section along the line Xl-XI of the outer carrier of FiG. 10.
FIG. 12 is a section corresponding to the view shown in FIG. 11 for illustrating a particular construction of outer carrier and inner carrier part.
FIG. 13 is a perspective view of an element used in the arrangement of FIG. 12.
FIG. 14 is a side elevation partially in section showing the interrelationship in another embodiment of an outer carrier and an inner carrier part.
FIG. 15 is a partial view in section seen in the axial direction of the framework member showing a special guide arrangement of a lower flange.
FEG. 16 is a side partial view of the inner carrier part used in the arrangement according to FIG. 15.
FIG. 17 is an enlarged illustration in side view of a detail in FIG. 14 in section showing another embodiment.
FIG. 18 is an enlarged partial elevation of an inner carrier part corresponding to FIG. 15, but showing a modified embodiment.
FIG. 19 corresponds to FIG. 2 but shows an embodiment modified relative to the construction of FIG. 2 in schematic side elevation.
FIG. 20 is a corresponding view of a further embodiment of the framework member.
FIG. 21 is a side partial view of the interengagement between an outer carrier and a casing carrier to show an arrangement for measurement of the setting.
According 0t FIG. 1 a framework member is arranged between two supports 1, 2. This member comprises an outer carrier 3 having a guide aperture in which an inner carrier part i is displaceable. The outer carrier has, as shown in FIG. 3 (in which similar reference numerals are used to those in FIG. 1) at the end edge of its upper flange 5, an abutment projecting into the guide aperture. The upper edge 7 of the inner carrier part 4 rests on this abutment under load or under the action of the actual weight of the framework member. The inner carrier part 7 can be pivoted round this abutment or fulcrum 6. It has in a lower edge 8 a groove-like guide 9 in which the head lltl of an adjustment screw 11 slides. This setting screw is held in a lower flange 12 of the outer carrier. By means of the adjustment of the setting screw 11 on the one hand the angular condition of the inner carrier part 4 relative to the outer carrier is determined and, in an advantageous embodiment, also the position in the axial direction of the carrier is fixed.
The upper edge and the lower edge are connected together by webs. These webs consist in the indicated examples of the side wall parts of the box-like carrier profile.
It should be noted that the bearer brackets 13, 14 of the outer carrier and the inner carrier part rest on the supports ll, 2.
After freeing the setting screw 11 the inner carrier part can be displaced axially relative to the outer carrier wherein the head it) slides in the groove 9.
In accordance with FIG. 2 the so-called outer carrier 15 is arranged in the centre of a framework member. In the outer carrier 15 two inner carrier parts l6, 17 are guided which in each case have bearer brackets at their outer ends. For each inner carrier part a setting screw 13 is arranged in the lower fiange of the outer carrier 15.
The framework member shown in FIG. 4 corresponds in its conception to the construction of FIG. 2. In the outer carrier 18 are two telescopic inner carrier parts 19, 20 with bearer brackets, wherein for fastening in each case a setting screw 21, 22. is provided. In the construction of FIG. 4 the carrier sections 19 to it are curved. By this means a special abutment which is designated in FIG. 3 by the numeral 6 is superfluous since the end edge of the upper edge 23 of the outer carrier 13 acts as the bearer. Obviously there may be such a construction also corresponding to the combination according to FIG. 1 or any desired combination of outer carriers and inner carrier parts may be used wherein inner carrier parts and outer carriers alternate. The embodiment in accordance with FIG. 4 provides the possibility in certain cases of pressing the upper edges Z4, 25 to a flat installation on the upper edges 23 of the outer carrier wherein particularly favourable force transmissions are produced. It is repeated that the radii of curvature of the inner carrier parts 19, 26 on the one hand and of the outer carrier 18 on the other hand with reference to the different rigidity properties arising on the basis of the necessarily different spatial cross-sectional dimensions of these carrier parts advantageously need not be equal.
FIG. shows for example a lower part of the constructional group in section consisting of outer carrier 3 and inner carrier part 4, in order to illustrate more clearly the fixing screw. It is evident that the groove 9 is disposed in the lower edge of the inner carrier part which groove is undercut. The groove has in the embodiment rectangular cross section, although other cross sections may be used.
The setting screw 11 is guided in the lower edge of the outer carrier 3, for example, a threaded bore can be cut into this lower edge in which the setting screw 11 provided with external screw thread is screwed in.
If desired a threaded bushing may be incorporated into the lower edge. The setting screw II has at its inner end the head whose dimensions correspond to the cross section of the groove 9. At the outer end of the setting screw 11 there is attached a setting member, for example in the form of a single armed lever 26 with which this screw can be adjusted from outside. There is also the possibility of fitting further additional lock nuts or 1ock ing elements on the setting screw 11.
The setting screw 11 has an internal bore 27 with screw threads. Through this internal bore a fixing screw 28 is guided whose inner end projects through the head It and can be pressed on to the base of the groove 9. The actuating element of the fixing screw is constructed as a screw head 29.
After setting of the height condition of the inner car rier part 4 by pivoting around the abutment 6 by means of the setting screw 11 the fixing screw 23 is then tightened in order to fix the correct setting of the carrier parts.
FIGS. 6 and 7 show modified embodiments of the fastening and setting screws only in partial illustration. In accordance with FIG. 6 in an edge 30 of the outer carrier a nut 31 is guided so as to be non-displaceable axially but rotatable by means of the screw head 32 disposed on the outer side. The setting screw 33 extends into this nut, the inner end of the setting screw having a head 34. It can be seen from FIG. 7 that the bearer edges 38, 39 of the head are curved in order to make possible an adjustment fitting to the longitudinal inclination of the inner carrier part or the corresponding inclination of the bearer surface of the groove in the lower edge of the inner carrier part, without producing an inadmissible edge pressure.
In this construction the fixing screw 4 guided in the setting screw 33 is provided with a head portion 41 which likewise can bear flatly on the base of the guide groove. The support is advantageously effected by the formation of a trough 4-2. The correspondingly rounded end of the fixing screw 4t projects into this trough. The head part 41 is in this case held in a cross piece 43 of the head 34.
In accordance with FIG. 8 a head portion 45 is supported pivotally on a setting screw in that lateral hearing projections 46 are disposed at the inner ends of the setting screws 44 in the trough 47 of the head portion 4-5. The head portion -.-5 is placed with a central slot above the internally disposed ends of the setting screw 44 wherein a slot 48 is so dimensioned that pivoting is made possible.
In these embodiments the head part 4-5 likewise has a raised edge web 49 which guides the head part 50 on the fixing screw 51. This head part 54 is according to FIGS. 6 and 7 placed with a ball surface shaped recess on the correspondingly shaped end of the fixing screw 51. The edge web 49 is so dimensioned with reference to the depth 52 of the guide groove in the lower edge that the head part 5% cannot come out of the edge web surround on the head part 45. In this way a faultless adjustment to every longitudinal inclination is achieved. It should be noted in this connection that the embodiments in accordance with FIGS. 6 to 8 have an adjustable nut 31 in the lower edge, since the head parts 34, 35 guided non-rotatably on the fixing screws 33, 34 cannot revolve in the groove.
The embodiment of FIG. 9 shows a lower edge 53 of an outer carrier which is not further illustrated however and the ends of the lower carrier part 54 disposed above this lower edge in section. The already described groove 55 is situated in this lower edge which groove is accessible in a downward direction through a slot whose side face is designated by the numeral 56.
The head 57 of a setting screw 53 is guided in this groove. The setting screw is screwed into a threaded aperture 59 of the lower flange 53. Between the head 57 and the setting screw 58 there is disposed a universal coupling consisting of a ball 60 and a ball enclosure 61 which are held together in known manner by a securing ring 62. By this means rotation of the setting screw 58 is possible without the head 57 which is adjustable relative to the screw axis needing to be turned.
FIGS. 10 and 11 show in comparison with FIG. 3 another form of the abutment designated in FIG. 3 by the numeral 6. The only partially illustrated outer carrier 63 which in its lower flange 64 guides an already described setting screw 65 has below the end of the upper flange 66 an abutment 67 disposed pivotally on the side walls of the carrier. FIG. 11 shows the arrangement of the abutments in section along the line XIXI. It is evident that the abutment 67 has a U section and is fastened by means of bolts 68, 69 in the side wall 70, '71.
FIG. 12 shows another kind of guide of an inner carrier part 77 on the side walls 78 of an outer carrier 72. Referring to FIG. 13 it can be seen that a slide shoe 74 arranged on a bolt 73 is maintained pivotable at the inner side of the side walls 78. This slide shoe engages in a correspondingly dimensioned groove 75 in the outer face of the upper flange of the inner carrier part and in this case renders possible a longitudinal displacement and simultaneous pivoting. The final position can be fixed by means of the nuts 76 fitted on the bolt 73. It is to be understood that an arrangement of the parts '73, 74, 76 is provided at each side of the carrier arrangement. By means of the cam track guide provided by means of the groove or the grooves 75 there occurs on the one hand the possibility of saving the fixing screws or also the setting screws and only providing an auxiliary fixing element. With more rigid arrangement of the shoe 74 on the outer carrier a special shape can be imparted to the groove 75 so that an automatic setting of the curvature of the whole carrier can be obtained dependent on its span width.
Another solution with a corresponding effect is shown in FiG. 14. In this form the outer carrier 79 together with an end bearer 80 indicated here only schematically on the upper edge 81 has an abutment piece 82 to which the end of the inner carrier part 84 conveniently provided with a rounded off bearer surface 83 is guided. With such an arrangement it is sufiicient to arrange a fixing screw 85 constructed as a pressure screw in the lower edge 86 of the outer carrier 79 while for additional security in this case also a groove guiding in the lower edge of the inner carrier part 84 is possible.
The abutment piece 82 has a contour or a momentarily previously described pivotal position of the inner carrier part relative to the outer carrier depending on the length of the inner carrier part 84 which has moved out so that an automatic setting of the carrier excess height is achieved.
Conveniently the bearer surface of the abutment piece 82 extends in a parabolic curve.
In accordance with FIG. 17 in which corresponding parts are designated with the same reference numerals as in FIG. 14, the abutment piece 82 is arranged so as to be exchangeable by means of the fixing screws 86, 87 so that a carrier can be adjusted to different loading possibilities.
In accordance with FIGS. and 16 the lower edge of the outer carrier 88 is formed with a channel 89. A weblike lower edge 90 of the inner carrier part 91 extends into this channel. In this web-like lower edge 91) on both sides channel-like cam track guides 92, 93 are provided in which for example, guide elements constructed as bolts 94, 95 engage which are arranged in the side walls of the U-shaped lower edge 89 of the outer carrier. There is the possibility of arranging friction reducing means on the inner end of the bolts 94, 95. The bolts 94, 95 are conveniently fixed on the U-shaped lower flange.
It is evident from FIG. 16 that the channels 92, 93 do not extend rectilinearly but advantageously are curved, and in fact preferably according to the parabolic curve in order to bring about an automatic height setting.
For adjustment, for example to different loading conditions in accordance with FIG. 18, the part 96 with the cam track-like guide channels 97, 98 can be fastened interchangeably to the lower flange 99 of the inner carrier part 1199. For example screw bolts 101 serve for the attachment.
It is expressly emphasised that the interengaging parts can be exchanged in their disposition. For example there is the possibility of arranging the channels 92, 93 or 97, 98 on the lower flange of the outer carrier and the guide bolts or corresponding guide elements on the lower flange of the inner carrier part.
As is evident from FIG. 15 in this case also the embodiments of FIGS. 15, 16 and 18 do not require any special setting screws since a simple fixing screw 102 suffices which for example is guided by means of the lower web of the channel-like lower flange 89 of the outer carrier 88.
FIGS. 19 and show still further constructions of a framework member schematically. In accordance with FIG. 19 an inner carrier part 1113 is arranged as the central part which is guided with its end in outer carriers 1%, 1115' which have bearer brackets 106, 167. The reciprocal guiding takes place in one of the ways described. In these constructions are merely shown the setting screws 1%, 1129 provided in the guide arrangement.
The embodiment according to FIG. 20 shows the special combination of an outer carrier 110 formed in two parts, both parts of which are angularly adjustable, for example are connected by means of a tension lock 111. The connection of the upper and lower flanges is apart from this effected in a manner known in itself. At the ends of this angularly adjustable outer carrier 110 the inner carrier parts 112 and 113 are guided in accordance with one of the previously described embodiments, for example using setting screws 114, 115.
FIG. 21 shows a particular arrangement which makes possible the accurate setting of a definite angle between an outer carrier 116 and an inner carrier part 117 guided in one another in the manner described. The showing of the bearer 118 on the upper flange of the outer carrier and the setting screw 119 are only given by way of example. In the side wall of the outer carrier 116 there is arranged an aperture 129 which is, for example, circu- .lar and advantageously also an elongated construction, at
the edge of which a marking 121 is provided. The inner end of the inner carrier part 117 is provided with markings 122 lying above one another extending in its axial direction and preferably channel-like, which can be observed through the aperture 120. The condition of the markings in each case relative to the mark 121 indicates the angle which has been set.
It is emphasized that the explanations are only given by way of example. There is always the possibility of arranging setting screws also in the upper flange and for example the bearer 118 corresponding to bearers in the lower flange. Furthermore, the setting means and bearer parts could be arranged on the same flange. As the setting means, in particular when using pure fixing elements other means also, such as screws, are applicable insofar as they fulfill the same purpose of fastening within the scope of the present invention.
1. Adjustable framework member consisting of at least two longitudinally extended parts including an outer carrier having a lower edge, an upper edge and side walls which connect the lower edge and the upper edge, an inner carrier telescopically received in said outer carrier with vertical clearance between the two carriers, adjustable locking means disposed inwardly of the end of said outer carrier for displacing the inner end of the inner carrier upwardly with respect to the outer carrier, and inwardly projecting fulcrum means located below the lower surface of the upper edge of the outer carrier at a point which lies outwardly of said locking means.
2. A framework member according to claim 1 wherein the outer carrier and inner carrier are curved with different radii of curvature and the inner carrier parts are curved with smaller radii of curvature in order to take account of the smaller moment of inertia of the inner carrier parts.
3. A framework member according to claim 1 wherein guide means are arranged in the lower edge of the inner carrier part, said guide means extending in the axial direction, and wherein said adjustable locking means engage in said axially extending guide means.
4. A framework member according to claim 3 wherein said guide means are constructed as channels, and wherein said locking means have a head and a shaft provided with screw threads engaging the outer carrier, said head being arranged so as to be non-detachable in the channels.
5. A framework member according to claim 4 wherein said locking means comprises a threaded bushing which has outer and inner screw threads, said outer screw threads engaging a threaded aperture in the lower edge of the outer carrier, a first actuating means fixed to said bushing for rotating the bushing, the inner end of the bushing projecting into said channel, the head of this inner end being disposed in the channel, and a bolt screwed through the inner screw thread of the threaded bushing and whose inner end projects through the head and engages the base of the channel.
6. A framework member according to claim 5 wherein said head is constructed in two parts, a first part which is connected rigidly with the screwed bushing and on which the face turned away from the screwed bushing has a slot and is penetrated by the aperture, and a second part which is displaceable freely within the slot in the axial direction relative to the screwed bushing and is freely 7 displaceable relative to the screwed bushing and disposed between the inner end of the bolt and the base of the channel so that it can be pressed in setting of the bolt against the base of the channel.
7. A framework member according to claim 6 wherein the part of the head connected to the screwed bushing is of enlarged construction wherein furthermore a rotatable nut is provided which nut is not displaceable in the axial direction but is arranged so as to be rotatable in an edge of the outer carrier and which further includes means for rotating the nut, in order to adjust the bushing by rotation of the nut.
8. A framework member according to claim 6 wherein the part of the head connected to the screwed bushing is pivotally connected to the screwed bushing, and pegs are arranged on the screwed bushing which extend perpendicular to the axial direction of the framework member, wherein notches are provided in the lower part of 8 the head which notches extend from the recess of the head and receive the pegs and wherein a rotatable nut is provided which nut is not dispiaceable in the axial direction but is arranged so as to be rotatable in the lower flange of the outer carrier.
9. A framework member according to claim 1, which includes slide shoes which project inwardly from the side wall parts of the outer carrier and cam tracks which extend on the sides of the lower edge of the inner carrier and in which the slide shoes can slide along.
References Cited in the file of this patent UNITED STATES PATENTS 2,167,413 Bartlett July 25, 1939 2,386,161 Hawes Oct. 2, 1945 2,909,253 Hinze Oct. 20, 1959 2,974,762 Hunnebeck Mar. 14, 1961