JP2005247373A - Binder using tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional binder has a complicated structure and is expensive in manufacturing cost since it has a pair of rollers for running a tape in a forward direction and a pair of rollers for running it in the reverse direction, and further they are driven by individual electric motors. <P>SOLUTION: When an electric motor 200 is normally rotating, the normal rotation is transmitted from a driven pulley 203 via a one-way clutch 205 to a transmission shaft 204 to cause a driving roller 21 to normally rotate and the tape T to travel in the forward direction. When the motor 200 is reversely rotating, the one-way pulley 205 is set free, and the reverse rotation is transmitted from the driven pulley 203 via a frictional member 214 to the transmission shaft 204, to cause the driving roller 21 to reversely rotate and the tape T to travel in the reverse direction. The driven pulley 203 and the frictional member 214 slide to function as a torque limiter 206 for preventing excessive tension from being applied to the tape T. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tape binding machine that forms a loop with a tape and binds an object to be bound by tightening the loop.

Conventionally, as the above-described binding machine, at least one side of which is a heat-adhesive binding tape is wound around an object to be bound, and the outer surface of the winding start portion and the inner surface of the winding end portion are polymerized. Further, there is provided a device that binds an object to be bound by pressing a heated pressing portion heated by a heater and thermally fusing the polymerized portion with a thermoplastic resin applied to a tape.
In this binding machine, a small loop is formed at the end of the tape fed out from a tape roll that is rotatably held in the apparatus, and then the loop is expanded by running the tape in order to follow the arched guide path. After forming into a large loop, the tape is run backwards to narrow down the large loop, thereby binding objects to be bound arranged in the loop (for example, Patent Document 1).
JP 2003-20006 A

In the above-described binding machine, a pair of rollers for causing the tape to travel in order and a pair of rollers for causing the tape to travel in reverse have been used on the traveling path of the tape.
That is, when the tape is moved forward, the pair of rollers for forward running causes the tape to run forward while the tape is held by the pair of rollers for backward running. On the other hand, when the tape is run backward, the pair of reverse running rollers sandwich the tape and the tape is run backward in a state where the holding of the tape by the pair of forward running rollers is released.

For this reason, two pairs of rollers are required for forward traveling and reverse traveling, and an electric motor is separately required, which complicates the structure and increases the manufacturing cost.
The present invention has been made in view of the above problems, and an object thereof is to provide a tape binding machine having a simple structure and low cost.

  In order to achieve the above object, the present invention forms a small loop formed at an end portion of a tape fed out from a tape roll into a large loop by causing the tape to run forward, and binds the objects to be bound. In a tape binding machine that retracts the tape to reverse the large loop, the drive roller and the driven roller that are arranged on both sides of the tape and can move the tape in the forward and reverse directions. And a transmission mechanism for transmitting a driving force from an electric motor capable of rotating in the forward and reverse directions to the driving roller, the transmission mechanism being capable of rotating integrally with the driving roller and a first transmission member driven by the electric motor A second transmission member, and a one-way clutch interposed between the first and second transmission members and capable of restraining relative rotation of the first and second transmission members during forward rotation of the electric motor It is characterized in that comprises a Restrictable torque limiter transmission torque below the limit torque between the first and second transmission member during reverse rotation of the electric motor.

  According to the present invention, when the electric motor rotates forward in order to enlarge the small loop, this forward rotation is transmitted to the drive roller via the first transmission member, the one-way clutch and the second transmission member, and the tape is It can be run in the forward direction. Conversely, when the electric motor rotates reversely to contract the large loop, the reverse rotation is transmitted to the drive roller via the first transmission member, the torque limiter, and the second transmission member, thereby reversing the tape. It is possible to run and squeeze the tape to tighten the object to be bound. During the tightening, it is possible to suppress an excessive tension from being applied to the tape by the action of the torque limiter. In this way, using only a single electric motor and a pair of rollers (driving roller and driven roller), the tape can be selectively moved in the forward and reverse directions, and the structure can be simplified. In addition, the manufacturing cost can be significantly reduced.

In the present invention, a limit torque adjusting means for adjusting the limit torque of the torque limiter may be provided. In this case, for example, the limit torque of the torque limiter can be adjusted according to the type of tape to be used, and versatility can be improved.
In the present invention, the first transmission member has an annular shape, the second transmission member includes a transmission shaft having first and second ends, and the torque limiter includes an annular friction member. One end of the transmission roller is coupled to the drive roller so as to be integrally rotatable, and the second end of the transmission shaft is inserted through the first transmission member and the annular friction member, and the friction member is integrated with the transmission shaft. The transmission shaft is provided with a restricting portion that is rotatable and axially movable and restricts the movement of the first transmission member to the side opposite to the friction member. The torque limiter transmits the friction member to the first transmission member. A spring member for pressing and urging the member may be further included. In this case, the second transmission member is formed by pressing and urging the friction member restrained in relative rotation with respect to the transmission shaft as the second transmission member to the first transmission member that can rotate relative to the transmission shaft. And the friction member can be frictionally connected. The first transmission member and the second transmission member (transmission shaft) can be coupled via this frictional coupling force to function as a friction torque limiter.

In the present invention, the torque limiter may include a pressing member for pressing the friction member by the urging force of the spring member, and a thrust bearing interposed between the pressing member and the friction member. In this case, the loss torque accompanying the relative rotation between the pressing member and the friction member can be minimized.
In the present invention, the limit torque adjusting means may include a screw portion and a nut capable of changing the screwing position in order to adjust the set length of the spring member. In this case, the torque limiter torque can be easily adjusted with a simple structure using screws.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a partially broken perspective view of a tape binding device according to an embodiment of the present invention. In FIG. 1, the upper surface of the apparatus body 1 is formed by a table 2. This table 2 is for placing a bundled object made of a stack of paper or the like, and is divided into a rear table 2a and a front table 2b, and a passage groove 3 is formed between them. ing. The passage groove 3 is used for passing a bundling tape during a winding operation.

  The front table 2 b is formed integrally with the front cover 4 of the apparatus main body 1. The front cover 4 is opened together with the front table 2b by tilting forward from an upright state as shown in FIG. 1 about an axis L1 along the left-right direction of the lower end of the apparatus body 1. ing. Thereby, the inside of the apparatus main body 1 can be easily inspected. For example, a click structure or the like is used between the front cover 4 and the apparatus main body 1 so that the front cover 4 is held in a closed state shown in FIG.

Guide frames 5 and 6 projecting upward from the apparatus main body 1 are formed at both ends of the passage groove 3, and the guide frames 5 and 6 have curved guide plates 7 and 8 that face each other. ing. These guide plates 7 and 8 are for guiding the tape running so that a tape loop is smoothly formed and the loop shape is maintained.
In FIG. 1, a receiving plate 9 for receiving the lower surface of an object to be bound placed on the table 2 is supported by a rocking mechanism described later, and is horizontal to the passage groove 3 to receive the object to be bound. Are advanced to and retracted from the advance position (see FIGS. 1 and 4) and retracted from the passage groove 3 (see FIG. 5).

The outer plate 1a of the apparatus main body 1 is provided with an open groove 10, through which a part of the roll 11 of the binding tape is exposed, and the remaining amount of the tape can be visually confirmed from the outside. ing. The roll 11 is held by a roll receiver 12 that can be rotated around an axis L2 along the front-rear direction of the apparatus main body 1 and can be opened and closed.
FIG. 2 is a schematic cross-sectional view showing the internal configuration of the apparatus main body 1 in a simplified manner. Referring to FIG. 2, the tape bundling device includes the receiving plate 9 for receiving the object A to be bound, and a clamp member for clamping and fixing the end of the tape T between the receiving plate 9 and the receiving plate 9. 13. It has a tape winding mechanism 14 for winding the tape T, a heating pressing part 15 and an auxiliary pressing part 16 as main parts.

The tape winding mechanism 14 includes the table 2, the tape traveling mechanism 17, the guide frames 5 and 6, the fixed side holding member 18 and the moving side holding member 19, and the moving holding tool 20.
Referring to FIG. 2, the tape running mechanism 17 is provided at the approximate center below the table 1 and feeds and retracts the tape T. The tape running mechanism 17 includes a driving roller 21 that is rotationally driven by an electric motor, and a driven roller 22 that is paired with the driving roller 21.

The drive roller 21 rotates forward (clockwise) to feed the tape T of the roll 11 from the guide plate 8 toward the guide plate 7 in order to enlarge the tape loop, while rotating backward (counterclockwise). Thus, the drive control is performed so that the tape T is pulled back to reduce the tape loop.
Immediately downstream of the pair of driving roller 21 and driven roller 22, the above-described fixed-side clamping member 18 and movable-side clamping that can hold the tape T immediately after being fed from these rollers 21 and 22 from above and below. A member 19 is provided.

The upper fixed-side clamping member 18 is attached to the front plate 1b so that the vertical position can be adjusted, and the lower moving-side clamping member 19 is moved up and down in conjunction with a moving mechanism (not shown). Yes.
The movable holding tool 20 is attached to the front plate 1 b between the pair of holding members 18 and 19 and the receiving plate 9. The movable holding tool 20 can move up and down, rotate and move back and forth while holding the tape T.

  The movable holding tool 20 can move up and down the distance from the height of the fixed-side holding member 18 to the height near the receiving plate 9, and moves forward and backward from the window portion 1 c provided on the front plate 1 b, so You can move back and forth. The movable holding tool 20 includes a pair of holding members 23 and 24. The pair of holding members 23 and 24 include a pair of steel leaf springs that are superposed on each other, and the passage groove 3 formed by the above-described longitudinal movement. The tape T is pinched by advancement to.

  The leaf springs constituting the holding members 23 and 24 have their respective distal ends spread outward, so that the tape T can be easily held during the longitudinal movement. Further, when the movable holding tool 20 moves the above-mentioned distance between the upper and lower sides, the movable holding tool 20 is rotated once while changing the positions of the holding members 23 and 24 up and down. Along with this one rotation, a loop is formed at the end of the tape T.

  The heating pressing portion 15 for heat-sealing the tapes T is disposed below the receiving plate 9 so as to be movable up and down. The heating pressing portion 15 elastically presses and heats the overlapping portion Ta of the tape T formed along the lower surface 9a of the receiving plate 9 to the lower surface 9a of the receiving plate 9 as shown in FIG. The polymerized portion Ta is thermally fused. The heating pressing unit 15 incorporates a heater described later. A cutter 25 is fixed to one surface of the heating and pressing unit 15, and the cutter 25 cuts the tape T when the pressing by the heating and pressing unit 15 is strengthened.

  The auxiliary pressing part 16 is arranged to be movable up and down on the right side of the heating pressing part 15 in FIG. The auxiliary pressing portion 16 contacts the overlapping portion before contacting the overlapping portion of the tape T, and after the heat fusion by the heating pressing portion 15 is completed and the heating pressing portion 15 leaves the overlapping portion, a predetermined time has passed. The polymerized portion is held down until the heat-fused portion is cooled and the adhesion is stabilized.

The tape T is configured by laminating a thermoplastic resin on at least one surface of a paper or other main material that is not fused, and the portion where the tape T is overlapped is heated and pressed by the heating pressing unit 15. This makes it possible to perform heat bonding.
The receiving plate 9, the fixed and moving side holding members 18, 19, the moving side holding tool 20, the heating pressing portion 15 and the auxiliary pressing portion 16 are operated in conjunction with each other via a link mechanism or a cam mechanism. It is configured.

Next, referring to FIG. 3 and FIG. 4, the apparatus main body 1 has a front side plate 1 b and a rear side plate 1 d. Referring to FIG. 3, an electric motor 200 capable of rotating in the forward and reverse directions is arranged between a front plate 1b and a rear plate 1d, and a motor housing 201 of the electric motor 200 is fixed to the rear plate 1d.
The tape running mechanism 17 includes the driving roller 21 and the driven roller 22 shown in FIG. 2, and a transmission mechanism 202 for transmitting a driving force from the electric motor 200 to the driving roller 21 shown in FIG. .

  Referring to FIG. 3, transmission mechanism 202 includes driven pulley 203 as a first transmission member driven by electric motor 200, and transmission shaft 204 as a second transmission member that can rotate integrally with drive roller 21. The one-way clutch 205 that is interposed between the driven pulley 203 and the transmission shaft 204 and can restrain the relative rotation of the driven pulley 203 and the transmission shaft 204 when the electric motor 200 rotates forward, and the driven pulley when the electric motor 200 rotates backward. And a torque limiter 206 capable of limiting the transmission torque between 203 and the transmission shaft 204 to a limit torque or less. Further, as shown in FIG. 4, a limit torque adjusting mechanism 230 that can adjust the limit torque by the torque limiter 206 is provided.

A drive pulley 208 is coupled to the output shaft 207 of the electric motor 200 so as to be integrally rotatable, and an endless belt 209 is stretched between the drive pulley 208 and the driven pulley 203.
The transmission shaft 204 as the second transmission member is inserted through the front plate 1b and the rear plate 1d, and is respectively held by bearing members 211 on holding members 210 fixed to opposing surfaces of the front plate 1b and the rear plate 1d. It is supported so as to be rotatable and immovable in the axial direction.

  The one-way clutch 205 is interposed between the inner peripheral surface of the driven pulley 203 and the outer peripheral surface of the transmission shaft 204. The one-way clutch 205 includes, for example, a holding member that is fitted to the inner peripheral surface of the driven pulley 203 so as to be integrally rotatable, and a plurality of sprags that are held by the holding member and arranged around the transmission shaft 204 in an annular shape. A known sprag type one-way clutch can be shown.

Via the sleeve 212, the drive roller 21 is connected to a first end portion 204a of the transmission shaft 204 protruding forward from the front side plate 1b so as to be integrally rotatable and not capable of relative movement in the axial direction.
A restricting portion 213 made of an annular member is connected to the second end portion 204b of the transmission shaft 204 protruding rearward from the rear side plate 1d so as to be capable of integrally rotating and not relatively displaceable in the axial direction. Further, a one-way clutch 205 is fitted to the second end portion 204b adjacent to the restricting portion 213, and a driven pulley 203 is fitted so as to be movable integrally in the axial direction.

The one-way clutch 205 is fitted so as to be movable in the axial direction of the transmission shaft 204, and the forward movement of the transmission shaft 204 is restricted by the restriction portion 213.
The torque limiter 206 is fitted to the second end portion 204b of the transmission shaft 204 so as to be relatively rotatable and relatively movable in the axial direction, and an annular friction member 214 slidably contacted with the driven pulley 203. From a pressing member 216 for pressing the friction member 214 via the thrust bearing 215 and, for example, a compression coil spring for pressing the friction member 214 toward the driven pulley 203 via the pressing member 216 and the thrust bearing 215 And a spring member 217 (see FIG. 4).

The thrust bearing 215 is fitted to the second end portion 204b of the transmission shaft 204 so as to be relatively rotatable and relatively movable in the axial direction. The thrust bearing 215 includes a pair of end members 215a and 215b and rolling elements such as a needle roller interposed between the end members 215a and 215b.
Referring to FIG. 4, a torque limiter mechanism 206 includes a swing arm 218 that supports the pressing member 216 on the distal end portion 218a and is swingable about a pivot shaft 228 of the base end portion 218b, and the swing arm. And an urging shaft 220 loosely fitted in the insertion holes 1e and 1f of the front plate 1b and the rear plate 1d.

  An annular spring seat 229, the spring member 217 and the sleeve 221 are inserted in this order into the first end 220a of the urging shaft 220 protruding forward from the front side plate 1b. In addition, a screw portion 222 is provided at the tip of the first end portion 220a, and a nut 223 and an operation knob 224 are screwed into the screw portion 222. The set length of the spring member 217 can be adjusted by adjusting the screwing position of the nut 223 with respect to the screw portion 222. The operation knob 224 locks the adjusted position of the nut 223 with respect to the screw portion 22.

The screw portion 222 and the nut 223 constitute the limit torque adjusting mechanism 230 described above. That is, by adjusting the screwing position of the nut 223 with respect to the screw portion 222, the distance between the front side plate 1b and the opposite end portion of the sleeve 221 is changed, and thereby the set length of the spring member 217 is changed. It is like that.
On the other hand, a double nut 226 that engages with a threaded portion 225 formed at the tip of the second end 220b of the biasing shaft 220 is engaged with the swing arm 217, whereby the biasing force of the spring member 217 is increased. Thus, the pressing member 216 can be urged toward the thrust bearing 215 via the urging shaft 220 and the swing arm 217.

The base end portion 218b of the swing arm 218 is swingably supported around a pivot shaft 228 provided on a support member 227 fixed to the rear plate 1d.
As the pressing member 216, a bolt that is screwed into the screw hole of the distal end portion 218 a of the swing arm 218 and inserted therethrough can be used. The lock nut 229 stops the screwing position of the bolt as the pressing member 216. The end of the bolt as the pressing member 216 is pressed by one end member 215a of the thrust bearing 215. On the other hand, the other end member 215 b of the thrust bearing 215 is pressed by the friction member 214.

Next, a mechanism for operating the receiving plate 9 and the clamp member 13 will be described with reference to FIGS. 5, 6, and 7.
The receiving plate 9 is a rectangular plate. The receiving plate 9 is fixed to an upper end 27 a of a tilt arm 27 that can swing around the first support shaft 26 by screws 28.
First, referring to FIG. 5, the first support shaft 26 is inserted into a support hole 31 of a support 30 fixed to the apparatus main body 1 with a screw 29 and supported by the support hole 31. The support shaft insertion hole 32 at the lower end 27 b is inserted and fastened to the nut 33.

  The tilt arm 27 is provided with a bent portion 27d at an intermediate portion 27c thereof, and generally has a "<" shape or a W shape. A support shaft 35 that rotatably supports the cam follower 34 is attached to the vicinity of the bent portion 27d. The cam follower 34 rolls on the peripheral surface of a cam 36 that is rotationally driven by an electric motor (not shown). The cam 36 and the cam follower 34 constitute a cam mechanism 37 for swinging the tilt arm 27 around the first support shaft 26.

  The clamp member 13 is swingably supported by a side portion near the upper end 27 a of the tilt arm 27 via a second support shaft 38. The clamp member 13 swings around the second support shaft 38, thereby closing the tape end between the lower surface 9a of the receiving plate 9 (see FIG. 7) and releasing the clamp at the tape end. It can be displaced between the open position (see FIG. 6).

  The clamp member 13 includes a clamp plate 40 having a support shaft insertion hole 39 along the side surface of the tilt arm 27, and an extension plate 41 that is integrally extended from the edge of the clamp plate 40 in an orthogonal manner. The second support shaft 38 is made of, for example, a bolt, and is connected to the nut 52 through the support shaft insertion hole 39 of the clamp plate 40 of the clamp member 13 and the support shaft insertion hole 51 of the tilt arm 27, and is supported by the tilt arm 27. The

Next, the interlocking mechanism 42 for interlocking the opening / closing operation of the clamp member 13 with the swing of the tilt arm 27 will be described.
The interlocking mechanism 42 urges the extending plate 41 of the clamp member 13, the connecting rod 43 that connects the extending plate 41 and the rear plate 1 d of the apparatus main body 1, and the receiving plate 9 to the retracted position and the clamp member. And an urging member 44 for urging 41 to the open position.

  The connecting rod 43 is composed of a long bolt, and the first end 43 a of the connecting rod 43 is loosely fitted into a loose fitting hole 45 as a support provided on the rear plate 1 d of the apparatus body 1. A pair of stoppers 46 are provided at the first end 43a of the connecting rod 43 before and after sandwiching the rear plate 1d. Specifically, a pair of stoppers 46 and 47 made of nuts are coupled to a threaded portion formed at the first end 43a of the connecting rod 43. As a result, the first end 43a of the connecting rod 43 is swingably supported by the loose fitting hole 45 of the rear plate 1d. The stopper 46 is made of a friction nut. Reference numeral 48 denotes a lot nut for the stopper 47.

On the other hand, the connecting rod 43 is inserted into a slide hole 49 provided in the extending plate 41 so as to substantially allow only axial sliding. A bolt head provided at the second end 43 b of the connecting rod 43 constitutes a stopper 50 for preventing the connecting rod 43 from coming off from the slide hole 49.
The upper edge of the clamp plate 40 is a clamp portion 40a for holding the end portion of the tape T between the lower surface 9a of the receiving plate 9 and the clamp portion 40a and the slide hole 49 of the extension plate 41 are They are formed so as to be parallel to each other. Therefore, the clamp part 40a of the clamp member 13 and the connecting rod 43 are kept in a parallel state.

As shown in FIG. 6, when the receiving plate 9 is tilted and is in the retracted position, the position of the second support shaft 38 is lowered and the connecting rod 43 is lowered forward, so that the clamp portion 40a of the clamp member 13 is also It becomes a front lowering and is in a state of being open to the front rising receiving plate 9.
On the other hand, as shown in FIG. 7, when the receiving plate 9 is in the horizontal advance position, the position of the second support shaft 38 is the highest and the connecting rod 43 is horizontal, so the clamp portion 40 a is also horizontal. It will be in the state which closes with respect to the horizontal receiving plate 9 similarly.

  Referring again to FIG. 5, the connecting member 53 includes a tube whose pair of end portions 53 a and 53 b are fixed to the front plate and the rear plate of the apparatus body 1 by screws 54 and 55, respectively. The connecting member 53 contributes to improving the strength of the frame of the apparatus main body 1. Further, when the tilt arm 27 swings, the tilt arm 27 functions to prevent the tilt arm 27 from falling down by slidingly contacting the side portion of the tilt arm 27 near the upper end 27a.

One end 44 a of the urging member 44 is hooked and engaged with an engagement hole 56 located slightly higher on the rear plate 1 d of the apparatus main body 1 and slightly next to the loose fitting hole 45. The other end 44 b of the urging member 44 is hooked and engaged with the engagement hole 57 of the extension plate 41 of the clamp member 13. The engagement hole 57 is at a position slightly lower than the slide hole 49.
Referring to FIG. 8, the movable side holding member 19, the heating pressing portion 15, and the auxiliary pressing portion 16 that move up and down at predetermined timings are driven by a single cam 58 via a swing lever 59. As the elevating base 60 is moved up and down, it is moved up and down.

  The moving side clamping member 19 is attached to an upper end portion of a shaft body 61 that is elastically supported by the elevating base 60. A holder 62 having a rectangular plate shape is fixed to a side portion of the upper end portion of the shaft body 61, and the moving side holding member 19 is fitted and held in the holding groove 63 of the holder 62. A curved tape guide 64 is attached to the opposite side of the holder 62 across the upper end portion of the shaft body 61.

  The shaft body 61 includes an upper half angular shaft portion 65 and a lower half round shaft portion 66, and a stepped portion 67 is provided between the shaft portions 65, 66. The round shaft portion 66 of the shaft body 61 is inserted through the washer 68, the compression coil spring 69 for elastic support, the collar 70, the insertion hole 71 and the washer 72 of the lifting base 60, and below the washer 72, the round shaft portion. A retaining ring 74 is engaged with the circumferential groove 73 at the tip of 66 to prevent it from coming off. Further, the compression coil spring 69 elastically biases the shaft body 66 and the moving-side holding member 19 upward via a stepped portion 67.

  A shaft body 75 for supporting the heating and pressing unit 15 is supported on the elevating base 60 so as to be able to move up and down integrally. A heater mounting base 76 fixed to the upper end of the shaft body 75 is attached to a block-shaped heat insulator. 77 is fixed. A planar heater or other heater 78 is disposed along the upper surface of the heat insulator 77. The heat pressing portion 15 is configured by the heat insulator 77 and the heater 78. The cutter 25 is fixed to a side portion of the heat insulator 77 using a fixing plate 79.

The upper half portion of the shaft body 75 is formed on the angular shaft portion 75 a, and the lower half portion is formed on the screw shaft 81. The screw 81 is fixed to the lift base 60 through the lock nut 82, the adjustment nut 83, the insertion hole 84 of the lift base 60 and the interlock nut 85.
Further, a shaft body 86 for supporting the auxiliary pressing portion 16 is elastically supported on the lifting base 60, and the auxiliary pressing portion 16 having a rectangular plate shape is fixed to a side portion of the upper end portion of the shaft body 86. ing.

  The shaft body 86 has an upper half angular shaft portion 88 and a lower half round shaft portion 89, and a stepped portion 88 is provided between the shaft portions 88, 89. A round shaft portion 89 of the shaft body 86 is inserted through the washer 90, the compression coil spring 91 for elastic support, the collar 92, the insertion hole 93 and the washer 94 of the elevating base 60, and the round shaft portion below the washer 94. A retaining ring 96 is engaged with a circumferential groove 95 at the tip of 66 to prevent it from coming off. The compression coil spring 91 elastically biases the shaft body 86 and the auxiliary pressing portion 16 upward via a stepped portion 89.

Further, a guide bar 97 is fixed to the lifting base 60 so as to be integrally lifted. Specifically, the guide rod 97 includes an upper half angular shaft portion 98 and a lower half screw shaft portion 99, and the screw shaft portion 99 is inserted through the insertion hole 100 of the elevating base 60, By being sandwiched and coupled to a pair of nuts 101, 102, it is fixed to the lifting base 60.
On the other hand, the comb-shaped member 103 and the plate member 104 are coupled by a screw 110 to form a guide frame 105 parallel to the elevating base 60, and the guide grooves 106 to 109 of the guide frame 105 are respectively corners of the shaft body 61. The axial movement of the shaft portion 65, the angle shaft portion 98 of the guide rod 97, the angle shaft portion 75a of the shaft body 75, and the angle shaft portion 87 of the shaft body 86 is guided.

Next, FIG. 9 to FIG. 13A and FIG. 13B are schematic views sequentially showing the tape bundling process of the bundling apparatus. With reference to FIGS. 9 to 13, the work process will be described in sequence.
First, as shown in FIG. 9, the tape T is sandwiched between the driving roller 21 and the driven roller 22 from the roll 11, and has passed between a pair of sandwiching members 18 and 19 separated from each other. The tip is clamped by the moving clamp 20 that is moving to the lower position. Then, from this state, the movable holding tool 20 moves to a position in the vicinity of the object A to be bound (hereinafter simply referred to as an upper position) while rotating substantially once (see FIG. 10A). As a result, a small loop L1 is formed.

  Next, the driving roller 21 rotates in the forward direction (clockwise in FIG. 10A), and a predetermined amount of tape T is fed from the guide plate 8 along the guide plate 7 so that the loop is expanded to form a large loop L2. [See FIG. 10 (b)]. When the loop is inflated in this way, referring to FIG. 3, electric motor 200 rotates forward, this forward rotation is transmitted to driven pulley 203 via drive pulley 208 and belt 209, and further, one-way clutch 205 and By being transmitted to the drive roller 21 via the transmission shaft 204, the tape T is caused to travel in the forward direction.

  Referring to FIG. 10B, after the large loop L <b> 2 is formed, the object to be bound A is placed on the table 1. Next, the clamp member 13 and the receiving plate 9 advance from the table 2 to the passage groove 3 side with the tape T inserted between them, and as shown in FIG. Reaches the vicinity of the bottom surface of the object A to be bound, the end portion of the tape T is sandwiched between the receiving plate 9 and the clamp member 13.

After that, the movable holding tool 20 moves backward from the passage groove 3 through the window portion 1c of the side plate 1b, and moves to the lower position while rotating substantially once, and enters a standby state for the next operation. During the above operation, the driving roller 21 rotates in the reverse direction, the loop is narrowed down, and a tightening operation is performed by a necessary amount according to the object A to be bound (see FIG. 11A).
When narrowing down the loop in this way, the electric motor 200 rotates in the reverse direction, and this reverse rotation is transmitted to the driven pulley 203 via the drive pulley 208 and the belt 209, and further, the driven pulley 203 and the friction member 214 of the torque limiter 206 The friction member 214 rotates reversely through the frictional coupling force, and the drive roller rotates reversely (counterclockwise in FIG. 11A) through the transmission shaft 204. As a result, the object T can be tightened by reversing the tape T and narrowing down the tape T. It is possible to suppress an excessive tension from being applied to the tape T by the action of the torque limiter 206 during the tightening. In other words, when a torque exceeding the frictional coupling force between the friction member 214 and the driven pulley 203 is loaded, slippage occurs between the two to prevent overload.

  When the tightening operation as described above is completed, the moving-side holding member 19 is elastically pushed up by the lifting base 60, and the tape T is held between the pushed-up moving-side holding member 19 and the fixed-side holding member 18. Then, the movable holding tool 20 advances forward to hold the tape T [see FIG. 11 (b)]. Further, as the lifting base 60 is raised, the auxiliary pressing portion 16 is pushed up, and the pushed-up auxiliary pressing portion 16 presses the overlapping portion Ta of the tape T toward the receiving plate 9 [see FIG. 12 (a)]. .

Next, as the elevating base 60 is further raised, the heating pressing portion 15 is pushed up, presses the overlapping portion Ta against the receiving plate 9, and heats and bonds the overlapping portion Ta by heating of the heater, and further heating pressing portion. The cutter 25 cuts the overlapped portion by pressing 15 (see FIG. 12B).
Next, the elevating base 60 turns downward, the heating pressing portion 15 descends and leaves the bonding portion of the binding tape T [see FIG. 13A], and then the auxiliary pressing portion 16 leaves the overlapping portion Ta. When the moving side clamping member 19 is separated from the fixed side clamping member 18 (see FIG. 13B), the bundling operation is completed and the next bundling operation is ready.

According to the present embodiment described above, when the electric motor 200 rotates forward to enlarge the small loop L1, this forward rotation is transmitted from the driven pulley 203 to the transmission shaft 204 via the one-way clutch 205. The drive roller 21 can be rotated forward so that the tape T can run in the forward direction.
Conversely, when the electric motor 200 rotates in reverse to contract the large loop L2, the one-way pulley 205 becomes free, while the reverse rotation is transmitted from the driven pulley 203 to the transmission shaft 204 via the friction member 214. Then, the drive roller 21 can be rotated in the reverse direction, and the tape T can be run in the reverse direction. Thereby, the tape T can be narrowed down and the object A to be bound can be tightened. During the tightening, it is possible to suppress an excessive tension from being applied to the tape by the action of the torque limiter. In this way, the tape T can be selectively run in the forward and reverse directions using only a single electric motor 200 and a pair of rollers (the driving roller 21 and the driven roller 22), and the structure is simple. And the manufacturing cost can be significantly reduced.

  Further, the set length of the spring member 217 is changed by changing the screwing position of the nut 223 with respect to the screw portion 225 of the urging shaft 220, whereby the friction coupling force between the friction member 214 and the driven pulley 203 is changed. Can be adjusted. As a result, for example, according to the type of tape to be used, the limiting torque of the frictional torque limiter 206 can be easily adjusted with a simple structure using the above-described screw, and versatility can be improved.

Further, since the thrust bearing 215 is interposed between the pressing member 216 and the friction member 214 of the torque limiter 206, the loss torque associated with the relative rotation between the pressing member 216 and the friction member 214 can be minimized. .
In addition, this invention is not limited to the said embodiment, The other well-known one-way clutch can be used as the one-way clutch 205. FIG. In addition, various modifications can be made within the scope of the claims of the present invention.

It is a schematic perspective view of the bundling device by the tape of one embodiment of the present invention. It is a schematic sectional drawing which shows the internal structure of the binding apparatus by a tape. It is a partially broken top view of the principal part of the mechanism for driving a drive roller. It is a partially broken side view of the principal part of the mechanism for driving a drive roller. It is a disassembled perspective view of a receiving plate and its operation mechanism. It is the schematic of the receiving plate in a retracted position, and its operation mechanism. It is the schematic of the receiving plate in an advance position, and its operation mechanism. It is a disassembled perspective view of the mechanism which operates a movement side clamping member, a heating press part, an auxiliary | assistant press part, and these. It is process drawing of binding work. (A) And (b) is process drawing of the bundling operation following FIG. (A) And (b) is process drawing of the bundling operation following FIG.10 (b). (A) And (b) is process drawing of the bundling operation following FIG.11 (b). (A) And (b) is process drawing of the bundling operation following FIG.12 (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body A Bundled thing T Tape Ta superposition | polymerization part 9 Receptacle 11 Tape roll 14 Tape winding mechanism 15 Heating press part 16 Auxiliary press part 17 Tape travel mechanism 18 Fixed side clamping member 19 Moving side clamping member 20 Moving clamping tool Drive roller 22 Driven roller 25 Cutter 200 Electric motor 202 Transmission mechanism 203 Driven pulley (first transmission member)
204 Transmission shaft (second transmission member)
205 One-way clutch 206 Torque limiter 207 Output shaft 208 Drive pulley 209 Belt 213 Restricting portion 214 Friction member 215 Thrust bearing 216 Pressing member 217 Spring member 218 Swing arm 220 Biasing shaft 221 Sleeve 222 Screw portion 223 Nut 224 Operation knob 227 Support Member 228 Pivot shaft 229 Spring seat 230 Limiting torque adjustment mechanism

Claims (5)

The small loop formed at the end of the tape fed out from the tape roll is expanded to form a large loop by moving the tape forward, and the large loop is contracted by moving the tape in reverse to bind the objects to be bound. In a tape binding machine,
A driving roller and a driven roller which are arranged on both sides of the tape and can move the tape in the forward direction and the reverse direction and which can rotate in the forward and reverse directions;
A transmission mechanism for transmitting a driving force from an electric motor capable of rotating in the forward and reverse directions to the driving roller;
The transmission mechanism includes a first transmission member driven by an electric motor,
A second transmission member that can rotate integrally with the drive roller;
A one-way clutch interposed between the first and second transmission members and capable of restraining relative rotation of the first and second transmission members at the time of forward rotation of the electric motor;
A tape binding machine, comprising: a torque limiter capable of limiting a transmission torque between the first and second transmission members to a limit torque or less during reverse rotation of the electric motor.   The tape binding machine according to claim 1, further comprising a limit torque adjusting means for adjusting a limit torque of the torque limiter. In claim 2, the first transmission member is annular, the second transmission member includes a transmission shaft having first and second ends, the torque limiter includes an annular friction member,
The first end of the transmission shaft connects the drive roller so as to be integrally rotatable, and the second end of the transmission shaft passes through the first transmission member and the annular friction member,
The friction member can rotate integrally with the transmission shaft and can move in the axial direction.
A restricting portion that restricts movement of the first transmission member to the opposite side of the friction member is provided on the transmission shaft,
The torque limiter further includes a spring binding member that presses and biases the friction member against the first transmission member.   4. The tape binding machine according to claim 3, wherein the torque limiter includes a pressing member for pressing the friction member by an urging force of the spring member, and a thrust bearing interposed between the pressing member and the friction member.   5. The tape binding device according to claim 4, wherein the limiting torque adjusting means includes a screw portion and a nut that can change a screwing position in order to adjust a set length of the spring member.

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