CA1292419C - Band feeding and tightening apparatus for strapping machine - Google Patents
Band feeding and tightening apparatus for strapping machineInfo
- Publication number
- CA1292419C CA1292419C CA000563825A CA563825A CA1292419C CA 1292419 C CA1292419 C CA 1292419C CA 000563825 A CA000563825 A CA 000563825A CA 563825 A CA563825 A CA 563825A CA 1292419 C CA1292419 C CA 1292419C
- Authority
- CA
- Canada
- Prior art keywords
- band
- roller
- tightening
- rollers
- elastic body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B13/00—Bundling articles
- B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
- B65B13/22—Means for controlling tension of binding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B13/00—Bundling articles
- B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
Abstract
ABSTRACT
The present invention comprises a touch roller for bringing a band into face contact with the outer peripheries of a reverse roller or a tension roller for tightening the band around an article to be strapped, especially in an apparatus for feeding and tightening the band of a strapping machine; and an annularness like member which is harder and has a resistance smaller than an elastic body and which is projected from the outer periphery of the elastic body having a large friction resistance on the outer peripheries and/or the reverse roller and/or the tension roller.
Because the band fed by the feed roller travels around the annularness like member having a small friction resistance projected on the outer periphery of the reverse roller or the tension roller with the surface of the band being brought into contact with the annularness like member, the band is smoothly fed regardless of the direction of rotation of the reverse roller or the tension roller and whether the state of the roller is free or stationary. In tightening the band, accordingly, the annularness like member which is harder than the elastic body on the outer periphery of the reverse roller or the tension roller is embedded in the elastic body, such that the elastic body having a large friction resistance and the touch roller are brought into compressive contact with the band and caused to rotate thereby performing firm tightening.
The present invention comprises a touch roller for bringing a band into face contact with the outer peripheries of a reverse roller or a tension roller for tightening the band around an article to be strapped, especially in an apparatus for feeding and tightening the band of a strapping machine; and an annularness like member which is harder and has a resistance smaller than an elastic body and which is projected from the outer periphery of the elastic body having a large friction resistance on the outer peripheries and/or the reverse roller and/or the tension roller.
Because the band fed by the feed roller travels around the annularness like member having a small friction resistance projected on the outer periphery of the reverse roller or the tension roller with the surface of the band being brought into contact with the annularness like member, the band is smoothly fed regardless of the direction of rotation of the reverse roller or the tension roller and whether the state of the roller is free or stationary. In tightening the band, accordingly, the annularness like member which is harder than the elastic body on the outer periphery of the reverse roller or the tension roller is embedded in the elastic body, such that the elastic body having a large friction resistance and the touch roller are brought into compressive contact with the band and caused to rotate thereby performing firm tightening.
Description
2~ 1~9 ~ 1 --BAND FEEDING AND TIG~ITENING
APPARATUS FOR STRAPPING_MAC~INE
FIELD OF T~E INVENTION AND RE~ATED ART
The present invention relates to a band-feeding and tightening apparatus composed of at least a pair of rollers respectively which are brought in-to compressively contact each other through the intermediary of a band for restoring the strapping band so as to be wound around an article to be strapped after the band has been fed into the outside of the main body of the strapping machine and the front end of the band has been grasped and fixed and, subsequent to the restoration of the band, tightening the band on the article to be strapped. The present invention relates in particular to a roller structure for tightening on the article to be strapped.
sand-feeding and tightening apparatuses composed of two or more pairs of rollers include many prior arts such as U.S.P. No. 4,383,881, and Japanese Patent No. 1123052 (Japanese Patent Publication No. 55-34050).
As an example, means disclosed in Japanese Patent Publication No. 55-34059 and the main point of which is illustrated in FIG. 4 is so constructed that a feed shaft 32 to which a feed roller 31 is fixed and a return shaft 34 to ~z~
which a return roller 33 is fixed are caused to rotate at high speed in opposite directions with each other through the intermediary oE a difEerential speed reducer, the band is fed into the outside oE the strapping machine by bringing touch rollers 35a and 35b into compressively contact with the outer periphery of the feed roller 31, the primary tightening of the band (a reverse roller in the present invention) is perEormed by bringing another touch roller 36 into compressively contact with the outer periphery of the return roller 33, and powerful secondary tightening (a ten-sion roller in the present invention) is performed by means of the low-speed high-torque oE the differential speed reducer by virtue of a crank disposed in the return shaEt 34 of the return roller 33j the crank which s-tarts to slide when the strength of tightening reaches a predetermined value thereby rapidly reducing the rotation oE the return shaft 34.
In the above apparatus, a touch roller 36 which is freely approachable and separable is provided on the lower surEace oE the return roller 33 to wind the band around the outer periphery of the return roller 33 whereby the contact area of the band with the return roller 33 is increased to prevent the band from slipping against the return roller 33 in the case oE band tightening for performing firm tightening. When the band is fed by a high-speed feed ~Z~2~
roller 31 and when the band is Eed by a return roller 31, the return roller 31 is also caused to reverse rotat.ion at a high speed, such that the band is inevitably brought into contact with the return roller 33 which is reversely rotating in spite of the band which is fed out at a high speed. For th.is reason, there were accidents of the return roller 33 which wears for a short period of time and which fuses because of heat of friction between the return roller 33 and the band. There is a known disadvantage in that the band is filled and jammed in a portion between the outer periphery of the return roller 33 and the guide body 37 by the contact of the band with the guide body 37 thereby making the band feeding impossible. When the touch roller 35a is brought into weak, compressive contact with the feed roller 31 and the touch roller 35b is brought into strong compressive with the feed roller 31 thereby preventing the contact of the band with return roller 33.
The above-described disadvantages may be regarded as being common to conventional, all means provided with one or more pairs of roller for restoring and tightening the band in addition to paired feed rollers for feeding the band.
It is mainly attributed to the outer periphery oE the return roller 33 using a material or a shape of high fric-tion resistance for ensuring h.igh torque, such as a metal on which a knurl is notched, around the return roller which the - 4 - ~9~
band is wound to bring the band into face contact with the return roller for obtaining sufficient tightening force as described above. In addition, the concomitant causes lie in the feed rollers and the return roller which are at any time caused to forward and reversely rotate for enhancing strapping efficiency, a slip of the band Erom the respective rollers in the travel of the band between the rollers in feeding and tightening the band, and the guide body 37 pro-vided through the intermediary of the gap for allowing the band to pass for preventing the band from being caught in another roller. It is obvious that the band which is brought into contact with these rollers is subjected to a friction resistance to reduce the feeding speed of the band when the roller around which the band is wound is stationary or free.
OBJECT AND SUMMA~Y OF THE INVENTION
It is an object of the present invention to solve the above described drawbacks, to smoothly perform band feeding at a very high speed without interrupting the feeding and tightening operations of the strapping band due to one or more pairs of rollers by means of a portion of a roller which is not responsible for -the feeding and tightening operations and which is furnished with a concomitant func-tion alone, and to accurately perform the tightening opera-~ 5 ~ 2 ~
tion. In an apparatus Eor Eeeding and tightening the bandin a strapping machine composed of a feed rollers for ;feeding a band, and the return roller and a reverse roller or a tension roller for tightening the band by means of at least one pair of rollers, the rollers for tightening the band is disposed at the rear of the band feeding direction with regard to the feed roller, the outer periphery of the above band-tightening roller is formed of an elastic body of a large friction resistance, and an annularness like member which is harder and has a friction resistance less than the elastic body and which is projected therefrom is provided on the outer periphery thereof.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1 and 2 illustrate one embodiment of the present invention, in which FIG. l(A) is a main portion sectional view (given by an arrow mark in FIG. 2), FIG. 1(B) is a fragmentary sectional view, and FIG. 2 is a main portion frontal view. FIG. 3 is a sectional view of a forward rotating roller, and FIG. 4 is a schematic diagram showing conventional art.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The mechanism is provided with a feed roller 10 which lZ~Z~
faces the band chuter 1 and feeds a band toward the outside of the main body at a regular interval and with a reverse roller 20 for returning the band which is wound around an article to be strapped. A reduction apparatus equipped motor 15 is directly connected to the drive shaft 11 of the feed roller 10, and a gear 19 attached to the drive shaft 11 is meshed with a gear 26 of greater diameter than that of the gear 19 connected to the shaft 21 o~ the reverse roller 20. Accordingly, the feed roller 10 and the reverse roller 20 always rotate in directions opposite to each o-ther.
Numerals 13 and 23 denote feed and reverse touch rollers which are locker rollers and have a similar struc-ture. The structure related to both touch rollers is described with reference to Fig. 3 showing the acting mecha-nism of the feed touch roller 13. Both of the touch rollers are supported by eccentric shafts 86 and 85, to the ends of which the upper ends of acting levers 90 and 9S are pivotally attached. The lower ends of these levers 90, 9S
are loosely inserted into a hole 92 bored through the bent pieces of L-shaped interlocking levers 91 and 96 and con-nected to the acting lever 90 through the intermediary of a spring 93. The lower end of the acting lever 90 is attached to the tips of arm levers 98 and 99 having rolls 94 and 97.
One end of the arm levers 98 and 99 are pivotally supported by a shaft 100 projected on the base plate, and a spring 101 3L29Z4~1 is locked at another end thereof to energize the spring in the direction of the band chuter 1.
Cams 102 and 103 are mounted on a shaft which is the extension of a cam shaft 40 for actuating a band fusion mechanism 70 composed of a known band gripper~ a heater and a center press, etc. and brought into contact with the rolls 94 and 97 of the arm levers 98 and 99, respectively, to per-form an interlocking action with the interlocking levers 91 and 96, or the acting levers 90 and 95.
In the embodiment illustrated herein, the feed touch roller 13 and the reverse touch roller 23 which are the locker rollers were used as follower rollers which rotate in slidable contact with the feed roller 10 and the reverse roller 20, the feed roller 10 and the feed touch roller 13 may be meshed with the reverse roller 20 and the reverse touch roller 23, respectively, by means of gears with the same diameters at high and low posit.ions to effect forward and reverse rotations with each other.
A portion oE the circumference of a tension roller 51 corresponding to the above-described return roller is disposed at the rear end of a band chuter 1 and the drive shaft 22 of the tension roller 51 is directly connected to a tightening motor 52 composed of a brake-equipped geared motor attached to the reverse side of a base plate 5. As given in FIG. 1, the tension roller 51 is a large-diameter ~ ~24-1~
roller and an elastic body of a large friction resistance, formed of such as urethane, is adhered to the outer periphery of the metallic roller. The center in the width direction of the outer peripheral surface composed o~ the elastic body 53 is provided with a notch, in which an annu-lar member 60 appropriated by a thrust washer ~ormed by coating a metal material which is harder and has a smaller friction resistance than the elastic body, such as stainless steel is embedded. The annular member 60 is projected from the outer periphery of the elastic body 53 by a slight distance such as 0.2 to 0.3 mm. Although the annular member 60 (not shown) is projected in series on the outer periphery of the elastic body 53, it may be projectedly embedded in the outer periphery of the elastic body 53 intermittently with slight intervals interposed therebetween. The annular member 60 may, as illustrated in FIG. 1(B), be in the form of a wire with a circu1ar cross-section and can be provided in the form of a column.
A tension touch roller 54 is shaft-supported by an eccentric shaft 58 and the other end of a crank 57 one end of which is connected to the rod 56 of a solenoid 55 is con-nected to the head Oe the eccentric shaft 58. The outer periphery of the tension touch roller 54 is so constructed as to be capable of freely compressive contact and separa-tion toward the downward of the outer periphery of the ten-9Z~
g sion roller 51 by means of expansion and contraction of therod 56.
A guide chuter 59 covers a portion of the outer periphery of the tension roller 51 through the intermediary of a ga~ for allowing the band to pass. One end thereof faces the rear end of the band chuter 1 and the other end thereof faces a portion of the outer periphery of the ten-sion touch roller 54.
The band is wound around an article to be strapped through a band guiding arch (not shown) on the main body of a strapping machine or manually and the front end of the band has reached a band fusion mechanism 50. Because the convex portion oE the cam 102 is not placed at position which pushes down the roll 94, a gap of thickness exceeding at least a sheet of the band is allowed between the feed roller 10 and the feed touch roller 13, such that there is no efEect on the band in the band chuter 1. The relation between the reverse roller 20 and the reverse touch roller 23 i5 also the same as the above. In this case, a cam shaft 4 is pivotally rotated by a starting switch and the front end i9 grasped by the mechanism for grasping the band front end in the band Eusion mechanism 50. Because of the cam which i9 simultaneously rotating, the acting lever 95 is pushed down through the intermediary of the roll 97, the arm lever 99, and the interlocking lever 96. The eccentric :~2~
shaft pivotably rotates in the form of an arc to push down the reverse touch roller 75 shaft-supported by the eccentric shaft thereby being brought into compressive contact with the reverse roller 74. Accordingly, the band-feeding end in the band chuter 1 is restored by a pair of rotably driving rollers at high speed (the primary tightening).
The tension roller 51 has already started rotation by means of the tightening motor 52 at the same time of band restoration by means of the reverse roller 20 and the reverse touch roller 23. The restored band travels while smoothly sliding around the annular member 60 with a low friction coefficient projected into the outer periphery of the elastic body 53 of the tension roller 51 in the guide chuter 59.
When the band is removed from the arch and wound around the article to be strapped, a signal for detecting the fact ~by means of a timer or other arbitrary means) excites the solenoid 55 whereby the tension touch roller 54 on the eccentric shaft 58 is brought into compre.ssive contact with the tension roller 51 through the intermediary of the crank 57. In this case, the annular member 61 on the elastic body 53 is pressed into the elastic body 53 through the inter-mediary of the band at a position at which the tension touch roller 54 is brought into contact with the elastic body 53 because of the compressive contact of the tension touch roller 54 and`on the peripheral surface on which the band is wound around the elas-tic body 53 whereby the band is tightened by the peripheral surface o the elastic body of a large friction resistance.
When the band lS firmly wound around to article to be strapped means for detecting completion of band tightening (not shown) detects the fact to produce a tightening comple-tion signal, which causes the tightening motor 52 to stop.
The cam shaft 4 rotates again to grasp the band feeding end and to relieve the excitement of the solenoid 55. The rota-tion of the cam shaft 4 swings the arm lever 99 whereby the compressive contact of the reverse touch roller 23 with the reverse roller 20 is relieved to form a gap in a degree free of contact with the band between the respective rollers in the band chuter 1. The cam shaft 4 which continues rotation perEorms fusion of the band-joining portion and cutting of the band-feeding end by means of the band fusion mechanism 50. Rotation of the cam shaft 4 relieves the compressive contact of the reverse roller 10 and the reverse touch roller 13 with the band. Rotation of the cam shaft 4 ren-der3 the feed roller 10 and the feed touch roller 13 in a state as given in FIG. 3 for rotating the cam to compressi-vely contact the band between both rollers and to feed a predetermined amount of the band to the upper surface of the main body.
~2~
The band in a predetermined length is fed by the timer and re-rotatlon of the cam 102 completes the band feeding.
Subsequent to it, a limit cam (not shown) which interlocks with the cam shaft 4 is actuated to turn a clutch which interlocks the rotation of the motor OFF with the cam shaEt 4 through the intermediary of a speed reducer 9 whereby rotation of the cam shaft 4 is caused to stop thereby returning the respective mechanism to the original position.
The band which is compressively contacted between the feed touch roller 13 and the feed roller 10 passes through the band chuter 1 via the outer peripheral surface of the tension roller 51 and is then fed into the outside of the main body as described above. In this case the band smoothly passes through the band chuter because the band travels along the projected margin of the annular member 60 of a small friction resistance projected into the outer periphery of the elastic body 53 in the guide chuter 59, so that the band is subjected to no friction with the tension roller 51 and to no resistance.
The cam shaft 4 rotates again because of a timer or another contro]. means to pivotally rotate the eccentric shaft B6 through the intermediary oE the acting lever 90 whereby the compressive contact of the feed touch roller 13 with the feed roller 10 thereby Einishing one process oE
strapping.
APPARATUS FOR STRAPPING_MAC~INE
FIELD OF T~E INVENTION AND RE~ATED ART
The present invention relates to a band-feeding and tightening apparatus composed of at least a pair of rollers respectively which are brought in-to compressively contact each other through the intermediary of a band for restoring the strapping band so as to be wound around an article to be strapped after the band has been fed into the outside of the main body of the strapping machine and the front end of the band has been grasped and fixed and, subsequent to the restoration of the band, tightening the band on the article to be strapped. The present invention relates in particular to a roller structure for tightening on the article to be strapped.
sand-feeding and tightening apparatuses composed of two or more pairs of rollers include many prior arts such as U.S.P. No. 4,383,881, and Japanese Patent No. 1123052 (Japanese Patent Publication No. 55-34050).
As an example, means disclosed in Japanese Patent Publication No. 55-34059 and the main point of which is illustrated in FIG. 4 is so constructed that a feed shaft 32 to which a feed roller 31 is fixed and a return shaft 34 to ~z~
which a return roller 33 is fixed are caused to rotate at high speed in opposite directions with each other through the intermediary oE a difEerential speed reducer, the band is fed into the outside oE the strapping machine by bringing touch rollers 35a and 35b into compressively contact with the outer periphery of the feed roller 31, the primary tightening of the band (a reverse roller in the present invention) is perEormed by bringing another touch roller 36 into compressively contact with the outer periphery of the return roller 33, and powerful secondary tightening (a ten-sion roller in the present invention) is performed by means of the low-speed high-torque oE the differential speed reducer by virtue of a crank disposed in the return shaEt 34 of the return roller 33j the crank which s-tarts to slide when the strength of tightening reaches a predetermined value thereby rapidly reducing the rotation oE the return shaft 34.
In the above apparatus, a touch roller 36 which is freely approachable and separable is provided on the lower surEace oE the return roller 33 to wind the band around the outer periphery of the return roller 33 whereby the contact area of the band with the return roller 33 is increased to prevent the band from slipping against the return roller 33 in the case oE band tightening for performing firm tightening. When the band is fed by a high-speed feed ~Z~2~
roller 31 and when the band is Eed by a return roller 31, the return roller 31 is also caused to reverse rotat.ion at a high speed, such that the band is inevitably brought into contact with the return roller 33 which is reversely rotating in spite of the band which is fed out at a high speed. For th.is reason, there were accidents of the return roller 33 which wears for a short period of time and which fuses because of heat of friction between the return roller 33 and the band. There is a known disadvantage in that the band is filled and jammed in a portion between the outer periphery of the return roller 33 and the guide body 37 by the contact of the band with the guide body 37 thereby making the band feeding impossible. When the touch roller 35a is brought into weak, compressive contact with the feed roller 31 and the touch roller 35b is brought into strong compressive with the feed roller 31 thereby preventing the contact of the band with return roller 33.
The above-described disadvantages may be regarded as being common to conventional, all means provided with one or more pairs of roller for restoring and tightening the band in addition to paired feed rollers for feeding the band.
It is mainly attributed to the outer periphery oE the return roller 33 using a material or a shape of high fric-tion resistance for ensuring h.igh torque, such as a metal on which a knurl is notched, around the return roller which the - 4 - ~9~
band is wound to bring the band into face contact with the return roller for obtaining sufficient tightening force as described above. In addition, the concomitant causes lie in the feed rollers and the return roller which are at any time caused to forward and reversely rotate for enhancing strapping efficiency, a slip of the band Erom the respective rollers in the travel of the band between the rollers in feeding and tightening the band, and the guide body 37 pro-vided through the intermediary of the gap for allowing the band to pass for preventing the band from being caught in another roller. It is obvious that the band which is brought into contact with these rollers is subjected to a friction resistance to reduce the feeding speed of the band when the roller around which the band is wound is stationary or free.
OBJECT AND SUMMA~Y OF THE INVENTION
It is an object of the present invention to solve the above described drawbacks, to smoothly perform band feeding at a very high speed without interrupting the feeding and tightening operations of the strapping band due to one or more pairs of rollers by means of a portion of a roller which is not responsible for -the feeding and tightening operations and which is furnished with a concomitant func-tion alone, and to accurately perform the tightening opera-~ 5 ~ 2 ~
tion. In an apparatus Eor Eeeding and tightening the bandin a strapping machine composed of a feed rollers for ;feeding a band, and the return roller and a reverse roller or a tension roller for tightening the band by means of at least one pair of rollers, the rollers for tightening the band is disposed at the rear of the band feeding direction with regard to the feed roller, the outer periphery of the above band-tightening roller is formed of an elastic body of a large friction resistance, and an annularness like member which is harder and has a friction resistance less than the elastic body and which is projected therefrom is provided on the outer periphery thereof.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1 and 2 illustrate one embodiment of the present invention, in which FIG. l(A) is a main portion sectional view (given by an arrow mark in FIG. 2), FIG. 1(B) is a fragmentary sectional view, and FIG. 2 is a main portion frontal view. FIG. 3 is a sectional view of a forward rotating roller, and FIG. 4 is a schematic diagram showing conventional art.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The mechanism is provided with a feed roller 10 which lZ~Z~
faces the band chuter 1 and feeds a band toward the outside of the main body at a regular interval and with a reverse roller 20 for returning the band which is wound around an article to be strapped. A reduction apparatus equipped motor 15 is directly connected to the drive shaft 11 of the feed roller 10, and a gear 19 attached to the drive shaft 11 is meshed with a gear 26 of greater diameter than that of the gear 19 connected to the shaft 21 o~ the reverse roller 20. Accordingly, the feed roller 10 and the reverse roller 20 always rotate in directions opposite to each o-ther.
Numerals 13 and 23 denote feed and reverse touch rollers which are locker rollers and have a similar struc-ture. The structure related to both touch rollers is described with reference to Fig. 3 showing the acting mecha-nism of the feed touch roller 13. Both of the touch rollers are supported by eccentric shafts 86 and 85, to the ends of which the upper ends of acting levers 90 and 9S are pivotally attached. The lower ends of these levers 90, 9S
are loosely inserted into a hole 92 bored through the bent pieces of L-shaped interlocking levers 91 and 96 and con-nected to the acting lever 90 through the intermediary of a spring 93. The lower end of the acting lever 90 is attached to the tips of arm levers 98 and 99 having rolls 94 and 97.
One end of the arm levers 98 and 99 are pivotally supported by a shaft 100 projected on the base plate, and a spring 101 3L29Z4~1 is locked at another end thereof to energize the spring in the direction of the band chuter 1.
Cams 102 and 103 are mounted on a shaft which is the extension of a cam shaft 40 for actuating a band fusion mechanism 70 composed of a known band gripper~ a heater and a center press, etc. and brought into contact with the rolls 94 and 97 of the arm levers 98 and 99, respectively, to per-form an interlocking action with the interlocking levers 91 and 96, or the acting levers 90 and 95.
In the embodiment illustrated herein, the feed touch roller 13 and the reverse touch roller 23 which are the locker rollers were used as follower rollers which rotate in slidable contact with the feed roller 10 and the reverse roller 20, the feed roller 10 and the feed touch roller 13 may be meshed with the reverse roller 20 and the reverse touch roller 23, respectively, by means of gears with the same diameters at high and low posit.ions to effect forward and reverse rotations with each other.
A portion oE the circumference of a tension roller 51 corresponding to the above-described return roller is disposed at the rear end of a band chuter 1 and the drive shaft 22 of the tension roller 51 is directly connected to a tightening motor 52 composed of a brake-equipped geared motor attached to the reverse side of a base plate 5. As given in FIG. 1, the tension roller 51 is a large-diameter ~ ~24-1~
roller and an elastic body of a large friction resistance, formed of such as urethane, is adhered to the outer periphery of the metallic roller. The center in the width direction of the outer peripheral surface composed o~ the elastic body 53 is provided with a notch, in which an annu-lar member 60 appropriated by a thrust washer ~ormed by coating a metal material which is harder and has a smaller friction resistance than the elastic body, such as stainless steel is embedded. The annular member 60 is projected from the outer periphery of the elastic body 53 by a slight distance such as 0.2 to 0.3 mm. Although the annular member 60 (not shown) is projected in series on the outer periphery of the elastic body 53, it may be projectedly embedded in the outer periphery of the elastic body 53 intermittently with slight intervals interposed therebetween. The annular member 60 may, as illustrated in FIG. 1(B), be in the form of a wire with a circu1ar cross-section and can be provided in the form of a column.
A tension touch roller 54 is shaft-supported by an eccentric shaft 58 and the other end of a crank 57 one end of which is connected to the rod 56 of a solenoid 55 is con-nected to the head Oe the eccentric shaft 58. The outer periphery of the tension touch roller 54 is so constructed as to be capable of freely compressive contact and separa-tion toward the downward of the outer periphery of the ten-9Z~
g sion roller 51 by means of expansion and contraction of therod 56.
A guide chuter 59 covers a portion of the outer periphery of the tension roller 51 through the intermediary of a ga~ for allowing the band to pass. One end thereof faces the rear end of the band chuter 1 and the other end thereof faces a portion of the outer periphery of the ten-sion touch roller 54.
The band is wound around an article to be strapped through a band guiding arch (not shown) on the main body of a strapping machine or manually and the front end of the band has reached a band fusion mechanism 50. Because the convex portion oE the cam 102 is not placed at position which pushes down the roll 94, a gap of thickness exceeding at least a sheet of the band is allowed between the feed roller 10 and the feed touch roller 13, such that there is no efEect on the band in the band chuter 1. The relation between the reverse roller 20 and the reverse touch roller 23 i5 also the same as the above. In this case, a cam shaft 4 is pivotally rotated by a starting switch and the front end i9 grasped by the mechanism for grasping the band front end in the band Eusion mechanism 50. Because of the cam which i9 simultaneously rotating, the acting lever 95 is pushed down through the intermediary of the roll 97, the arm lever 99, and the interlocking lever 96. The eccentric :~2~
shaft pivotably rotates in the form of an arc to push down the reverse touch roller 75 shaft-supported by the eccentric shaft thereby being brought into compressive contact with the reverse roller 74. Accordingly, the band-feeding end in the band chuter 1 is restored by a pair of rotably driving rollers at high speed (the primary tightening).
The tension roller 51 has already started rotation by means of the tightening motor 52 at the same time of band restoration by means of the reverse roller 20 and the reverse touch roller 23. The restored band travels while smoothly sliding around the annular member 60 with a low friction coefficient projected into the outer periphery of the elastic body 53 of the tension roller 51 in the guide chuter 59.
When the band is removed from the arch and wound around the article to be strapped, a signal for detecting the fact ~by means of a timer or other arbitrary means) excites the solenoid 55 whereby the tension touch roller 54 on the eccentric shaft 58 is brought into compre.ssive contact with the tension roller 51 through the intermediary of the crank 57. In this case, the annular member 61 on the elastic body 53 is pressed into the elastic body 53 through the inter-mediary of the band at a position at which the tension touch roller 54 is brought into contact with the elastic body 53 because of the compressive contact of the tension touch roller 54 and`on the peripheral surface on which the band is wound around the elas-tic body 53 whereby the band is tightened by the peripheral surface o the elastic body of a large friction resistance.
When the band lS firmly wound around to article to be strapped means for detecting completion of band tightening (not shown) detects the fact to produce a tightening comple-tion signal, which causes the tightening motor 52 to stop.
The cam shaft 4 rotates again to grasp the band feeding end and to relieve the excitement of the solenoid 55. The rota-tion of the cam shaft 4 swings the arm lever 99 whereby the compressive contact of the reverse touch roller 23 with the reverse roller 20 is relieved to form a gap in a degree free of contact with the band between the respective rollers in the band chuter 1. The cam shaft 4 which continues rotation perEorms fusion of the band-joining portion and cutting of the band-feeding end by means of the band fusion mechanism 50. Rotation of the cam shaft 4 relieves the compressive contact of the reverse roller 10 and the reverse touch roller 13 with the band. Rotation of the cam shaft 4 ren-der3 the feed roller 10 and the feed touch roller 13 in a state as given in FIG. 3 for rotating the cam to compressi-vely contact the band between both rollers and to feed a predetermined amount of the band to the upper surface of the main body.
~2~
The band in a predetermined length is fed by the timer and re-rotatlon of the cam 102 completes the band feeding.
Subsequent to it, a limit cam (not shown) which interlocks with the cam shaft 4 is actuated to turn a clutch which interlocks the rotation of the motor OFF with the cam shaEt 4 through the intermediary of a speed reducer 9 whereby rotation of the cam shaft 4 is caused to stop thereby returning the respective mechanism to the original position.
The band which is compressively contacted between the feed touch roller 13 and the feed roller 10 passes through the band chuter 1 via the outer peripheral surface of the tension roller 51 and is then fed into the outside of the main body as described above. In this case the band smoothly passes through the band chuter because the band travels along the projected margin of the annular member 60 of a small friction resistance projected into the outer periphery of the elastic body 53 in the guide chuter 59, so that the band is subjected to no friction with the tension roller 51 and to no resistance.
The cam shaft 4 rotates again because of a timer or another contro]. means to pivotally rotate the eccentric shaft B6 through the intermediary oE the acting lever 90 whereby the compressive contact of the feed touch roller 13 with the feed roller 10 thereby Einishing one process oE
strapping.
Claims
WHAT IS CLAIMED IS:
(1) An apparatus for feeding and tightening a band in a strapping machine, said apparatus comprising: a pair of feed rollers; a touch roller, which is freely contactable with and separable from the outer peripheries of the feed roller, for feeding a band into the outside of the main body of a strapping machine, a touch roller being also contac-table with and separable from the outer peripheries to reverse roller and/or tension roller at a position which brings the band into face contact with a pair of the reverse rollers and/or the tension rollers and/or the outer peripheries of the reverse rollers and/or the tension rollers; and annular members around which said reverse roller and/or said tension roller are disposed rearward in the band feeding direction with respect to said feed rollers, the outer peripheries of said reverse rollers and/or said tension rollers being formed of an elastic body of a large friction resistance, and an annularness like member which is harder and has a friction resistance smaller than the elastic body being projected from said elastic body.
(2) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said reverse rollers are provided between said feed rollers and said tension rollers.
(3) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is provided in series on the outer periphery of said elastic body.
(4) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is a thrust washer formed of teflon-coated stainless steel.
(5) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is composed of two annular mem-bers which disposed in parallel at a regular interval in the width direction of the outer periphery of said elastic body.
(1) An apparatus for feeding and tightening a band in a strapping machine, said apparatus comprising: a pair of feed rollers; a touch roller, which is freely contactable with and separable from the outer peripheries of the feed roller, for feeding a band into the outside of the main body of a strapping machine, a touch roller being also contac-table with and separable from the outer peripheries to reverse roller and/or tension roller at a position which brings the band into face contact with a pair of the reverse rollers and/or the tension rollers and/or the outer peripheries of the reverse rollers and/or the tension rollers; and annular members around which said reverse roller and/or said tension roller are disposed rearward in the band feeding direction with respect to said feed rollers, the outer peripheries of said reverse rollers and/or said tension rollers being formed of an elastic body of a large friction resistance, and an annularness like member which is harder and has a friction resistance smaller than the elastic body being projected from said elastic body.
(2) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said reverse rollers are provided between said feed rollers and said tension rollers.
(3) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is provided in series on the outer periphery of said elastic body.
(4) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is a thrust washer formed of teflon-coated stainless steel.
(5) An apparatus for feeding and tightening a band into a strapping machine in accordance with Claim 1 wherein said annularness like member is composed of two annular mem-bers which disposed in parallel at a regular interval in the width direction of the outer periphery of said elastic body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62093109A JPS63258713A (en) | 1987-04-17 | 1987-04-17 | Band supply and stretching device in packaging machine |
| JP62-93109 | 1987-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1292419C true CA1292419C (en) | 1991-11-26 |
Family
ID=14073356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000563825A Expired - Lifetime CA1292419C (en) | 1987-04-17 | 1988-04-11 | Band feeding and tightening apparatus for strapping machine |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4910945A (en) |
| JP (1) | JPS63258713A (en) |
| KR (1) | KR910008311B1 (en) |
| CA (1) | CA1292419C (en) |
| DE (1) | DE3812626A1 (en) |
| ES (1) | ES2007464A6 (en) |
| FR (1) | FR2614006B1 (en) |
| GB (1) | GB2203403B (en) |
| IT (1) | IT1219535B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2740804B2 (en) * | 1990-02-09 | 1998-04-15 | ストラパック株式会社 | Method of removing empty packing band in packing machine |
| IT1256240B (en) * | 1992-12-23 | 1995-11-29 | Sestese Off Mec | CONTROL DEVICE FOR DRAGING THE STRAP IN A STRAPPING MACHINE |
| US5459977A (en) * | 1993-12-09 | 1995-10-24 | Illinois Tool Works Inc. | Method and apparatus for an improved power strapping machine |
| US5377477A (en) * | 1993-12-09 | 1995-01-03 | Signode Corporation | Method and apparatus for a power strapping machine |
| DE19523274A1 (en) * | 1995-06-27 | 1997-01-09 | Mosca G Maschf | Machine for tying up packages with especially weldable plastic band - has guide frame with band-conveyor, with drive wheel and two pressure wheels |
| DE19828244A1 (en) * | 1997-07-22 | 1999-01-28 | Smb Schwede Maschinenbau Gmbh | Drive mechanism for banding machine |
| DE102008004118B4 (en) * | 2008-01-11 | 2011-04-14 | Maschinenfabrik Gerd Mosca Ag | Strapping machine with a tape guide channel and a supply unit |
| CN109650179B (en) * | 2018-12-12 | 2020-04-07 | 中铁建电气化局集团南方工程有限公司 | Electric power through wire cable arrangement, drawing in and ligature device |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2326670A (en) * | 1941-08-21 | 1943-08-10 | Jr Joseph C Patterson | Sheave and pressure rider |
| US2786672A (en) * | 1954-07-15 | 1957-03-26 | Mid States Gummed Paper Co | Tape-feeding mechanism |
| US3023963A (en) * | 1954-12-28 | 1962-03-06 | Rca Corp | Digital computing systems |
| US3077293A (en) * | 1960-05-16 | 1963-02-12 | Midwestern Instr Inc | Pressure roller assembly for recording media |
| US3132785A (en) * | 1962-03-05 | 1964-05-12 | Eastman Kodak Co | Roller drive system |
| GB1026304A (en) * | 1963-07-18 | 1966-04-14 | Revertex Ltd | Improvements in or relating to apparatus for and a method of impregnating non-woven fabrics |
| US3269300A (en) * | 1964-12-29 | 1966-08-30 | Fmc Corp | Strapping machine |
| US3752058A (en) * | 1971-06-11 | 1973-08-14 | Signode Corp | Feed mechanism |
| JPS5841821B2 (en) * | 1978-08-31 | 1983-09-14 | 花王株式会社 | Powdered antifoaming agent for tofu |
| DE3118712A1 (en) * | 1981-05-12 | 1982-12-02 | Cyklop International Emil Hoffmann KG, 5000 Köln | DEVICE FOR PUTING AND STRAPPING A STRAP around a PACKAGE |
| US4383881A (en) * | 1981-09-17 | 1983-05-17 | Strapack Shimojima Co., Ltd. | Strapping machine |
| DE3249559A1 (en) * | 1982-05-29 | 1985-08-14 | Hoesch Ag, 4600 Dortmund | Feed and clamping apparatus for a hoop to be tensioned about a packing unit |
| JPS61164918A (en) * | 1984-12-29 | 1986-07-25 | ニチロ工業株式会社 | Method and device for feeding and stretching band in packaging machine |
| US4683017A (en) * | 1985-11-25 | 1987-07-28 | Signode Corporation | Method and apparatus for forming a loop with end-gripped strap |
| JP2796966B2 (en) * | 1987-11-06 | 1998-09-10 | 財団法人電気磁気材料研究所 | Ultra-low thermal expansion alloy and manufacturing method |
| JPH05211918A (en) * | 1991-02-25 | 1993-08-24 | Han Kojima | Hairbrush |
-
1987
- 1987-04-17 JP JP62093109A patent/JPS63258713A/en active Granted
-
1988
- 1988-04-08 US US07/179,568 patent/US4910945A/en not_active Expired - Fee Related
- 1988-04-11 CA CA000563825A patent/CA1292419C/en not_active Expired - Lifetime
- 1988-04-13 GB GB8808708A patent/GB2203403B/en not_active Expired - Lifetime
- 1988-04-14 KR KR1019880004257A patent/KR910008311B1/en not_active IP Right Cessation
- 1988-04-15 DE DE3812626A patent/DE3812626A1/en active Granted
- 1988-04-15 ES ES8801181A patent/ES2007464A6/en not_active Expired
- 1988-04-15 IT IT47856/88A patent/IT1219535B/en active
- 1988-04-15 FR FR888804992A patent/FR2614006B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2614006A1 (en) | 1988-10-21 |
| FR2614006B1 (en) | 1991-06-21 |
| US4910945A (en) | 1990-03-27 |
| JPS63258713A (en) | 1988-10-26 |
| DE3812626C2 (en) | 1993-02-18 |
| IT1219535B (en) | 1990-05-18 |
| JPH0314690B2 (en) | 1991-02-27 |
| DE3812626A1 (en) | 1988-10-27 |
| GB2203403A (en) | 1988-10-19 |
| IT8847856A0 (en) | 1988-04-15 |
| ES2007464A6 (en) | 1989-06-16 |
| GB8808708D0 (en) | 1988-05-18 |
| KR880012444A (en) | 1988-11-26 |
| KR910008311B1 (en) | 1991-10-12 |
| GB2203403B (en) | 1991-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1320427C (en) | Method and apparatus for feeding and tightening a band in strapping machine | |
| KR102302086B1 (en) | strapping device | |
| US4885901A (en) | Band loading apparatus in a packaging machine | |
| CA1292419C (en) | Band feeding and tightening apparatus for strapping machine | |
| JP2740804B2 (en) | Method of removing empty packing band in packing machine | |
| JPH05338615A (en) | Method and device for feeding and tightening band in packing machine | |
| CA1310256C (en) | Control apparatus in strapping machine | |
| CA1081109A (en) | Tying machine | |
| US4383881A (en) | Strapping machine | |
| US4523449A (en) | Grip-feed machines used with stamping and bending machines | |
| GB2072128A (en) | Strapping apparatus feed and tension mechanism | |
| DE19547282A1 (en) | Packaging machine with web feed, roller unit and sealing station | |
| CA1292418C (en) | Band tightening apparatus in a strapping machine | |
| GB2144092A (en) | Strapping apparatus | |
| US4063442A (en) | Method and apparatus for forming tubes | |
| JPS59360B2 (en) | web breaking device | |
| EP3294633B1 (en) | Tension head with tension wheel cam biasing element for modular steel strapping machine | |
| US5605267A (en) | Apparatus for automatically feeding the end of a web of material | |
| JPS584803Y2 (en) | Band tightening force adjustment device for band-type packing machine | |
| DE3118007C2 (en) | Packaging machine for wrapping objects in film | |
| DE19523274A1 (en) | Machine for tying up packages with especially weldable plastic band - has guide frame with band-conveyor, with drive wheel and two pressure wheels | |
| JPS5917012B2 (en) | Printing paper reversing mechanism in printing press | |
| KR910007627Y1 (en) | Band loading apparatus in a packing machine | |
| EP0711704B1 (en) | Twist tie Machine | |
| KR830002597Y1 (en) | Band Tightening Force Adjuster of Band Packing Machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |