JPH056014U - Torsion torque adjusting device for binding machine - Google Patents

Abstract

(57) [Summary] [Purpose] The twisting torque of the binding machine can be adjusted by using a tool,
Allow easy adjustment without disassembling the housing case. [Structure] The front shaft of the twisting mechanism 70 is loosely fitted in the center hole of the male screw 121. The end portion of the male screw 121 is fixed to the main body frame, and the gear 123 having a female screw on the inner peripheral surface is attached to the male screw 12.
Screw to 1. An opposed gear 125 is provided in parallel with the gear 123, and its shaft 126 is projected to the outside of the binding machine 1. Axis 1
The adjusting knob 127 attached to the switch 26 is fixed by ratchet means such as a ratchet. When the adjustment knob 127 is released from the fixed state and manually rotated, the gear 123 moves on the front shaft. As a result, the thrust limit on the ball clutch 75 can be changed to adjust the torque limit set value.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a binding machine and, more particularly, to a twisting torque adjusting device for a binding machine used for reinforcing bar binding work of a reinforced concrete structure.

[0002]

[Prior Art]

 Conventionally, the worker uses a wire to manually bind the reinforcing bars when constructing a reinforced concrete structure, but the amount of work is enormous depending on the scale of the structure. Therefore, in response to requests such as reduction of labor and improvement of work efficiency, a binding machine that automatically performs a series of binding work from winding the wire around the reinforcing bar and twisting and tightening the wire is proposed. Has been done.

This type of binding machine is formed so as to be portable and has a guide tube for binding wire projected to the front of the main body. The front part of the guide tube is bent in a hook shape.If you bend this bent part on a reinforcing bar that binds it and turn on the manual switch, the long wire wound on the reel is fed by the feed mechanism. Sent from. The wire is bent by the bending portion and continuously sent out, and goes around the reinforcing bar a plurality of times.

Subsequently, a gripping part such as a chuck or a hook provided on a twisting mechanism protruding to the front of the binding machine body converges and grasps the wound wire, and the gripping part rotates to twist the wire. Tighten. In addition, a cutting machine installed at the front end of the guide tube cuts the wire at the exit of the guide tube to complete the bundling work, and sequentially controls the operation of each mechanism described above to automatically perform one cycle of work. To do.

The binding machine uses one motor as a power source, and sequentially switches power transmission to each mechanism section by a cam mechanism to turn off the power at the end of one cycle of the process, but in the twisting process, It is conceivable that the twisting torque reaches its limit and locks before the gripping portion twisting the wire reaches a predetermined twisting speed. In this state, the drive motor is forcibly stopped, so the rotation of the cam is also stopped and the one cycle process cannot be completed.Therefore, take measures such as cutting the tightened wire to remove the grip from the wire. You have to open it up. Further, in the locked state, there is a risk that an overcurrent will flow to the motor, causing a motor coil burnout accident and a battery heat generation.

Therefore, in order to prevent this kind of accident, the shaft of the twisting mechanism is divided into two, and the shaft on the driving side and the shaft on the gripping part side are connected via a clutch to allow the twisting mechanism to rotate a certain amount or more. When a load is applied, the shaft on the drive side slips and rotates, preventing the motor from stopping in the middle of one cycle.

[0007]

[Problems to be solved by the device]

 The clutch of the binding machine described above does not slip during normal twisting work, and the pressure must be set so that it will slip only when the load exceeds the set torque. Further, depending on the wire diameter of the wire used, it may be necessary to adjust the clutch pressure in order to prevent the wire from being cut. However, it is difficult to change the pressure with a structure in which the clutch plates are simply pressed by a spring.

[0008] Therefore, there arises a technical problem to be solved in order to improve the practicality of the binding machine by easily and quickly adjusting the pressure of the clutch, and the present invention aims to solve the problem. To aim.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention feeds a wire W into a guide tube 40 by a wire feeding mechanism, bends the front part of the guide tube 40 into an arc shape, and winds the wire W around a reinforcing bar or the like a plurality of times. A binding unit configured to cut the wire W into a predetermined length by a cutting mechanism, twist the wound wire W by a twisting mechanism 70, and sequentially control each of the above mechanical units to perform a series of binding work. In the binding machine 1 in which the shafts 71 and 72 of the twisting mechanism 70 are divided into two and the transmission torque limiting means such as the ball clutch 75 is interposed, the central hole 120 is opened in the male screw 121. And the male screw 121 is fixed to the bearing portion, the female screw 122 is formed in the center hole of the gear 123, and the gear 123 is screwed onto the male screw 121. , The transmission torque of the end surface of the gear 123 The counter gear 125, the counter gear 125 is disposed and meshed with the gear 123, and the shaft 126 of the counter gear 125 is penetrated to the outside of the housing 2 to form a manual adjustment mechanism. The binding machine is characterized in that the clutch pressure of the transmission torque limiting means can be adjusted and the manual adjusting mechanism is provided with a pawl means that can be engaged and disengaged so as to prevent the rotation of the gear 123. We propose a twist torque adjusting device.

[0010]

[Action]

 The twisting mechanism of the binding machine is provided with transmission torque limiting means such as a ball clutch and a friction clutch. A male screw having a central hole is loosely fitted to the shaft of the twisting mechanism, and the end of the male screw is fixed to the main body side. A gear with a female thread cut at the center is screwed into the male screw, and when this gear is rotated, it moves in the axial direction, pushing one clutch plate of the transmission torque limiting means and pressing force in the thrust direction of the clutch. Adjusted. The shaft of the opposed gear that meshes with the gear described above penetrates the housing and projects to the outside. By rotating the shaft, the gears work together to adjust the torsion torque from the outside of the binding machine. Further, the manual adjustment mechanism consisting of the opposed gear and its shaft is provided with a ratchet or other disengageable pawl to prevent the opposed gear from idling, and the torque setting does not change during use.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. For convenience of description, the configuration of the entire binding machine will be described first. 1 is a side view of a binding machine with a side cover removed, FIG. 2 is an enlarged side view of a housing portion, FIG. 3 is a cross-sectional plan view of the housing portion, and FIGS. 4 to 10 are lines AA of FIG. , BB line, CC line, DD line, EE line, FF line, and GG line arrow view.

In the binding machine 1 shown in FIG. 1, a grip 3 is provided on the lower surface of a housing 2 made of die casting, and a motor 4 is driven by a Ni-cd battery (not shown) housed in the side surface of the housing 2. The motor 4 is arranged at the rear lower part of the housing 2 at the back of the paper in the figure, drives the first intermediate shaft 7 via the gears 5 and 6 as shown in FIGS. 7, the power is transmitted from the first intermediate shaft 7 to the second intermediate shaft 10 by the gears 8 and 9, and further in front of it, the gears 12 and 13 are transmitted to the main shaft 11 as shown in FIG. Transmits decelerated power.

As shown in FIG. 2, a worm gear 14 is fitted to the rear portion of the main shaft 11, and as shown in FIG. 10, a worm wheel 16 of a cam shaft 15 disposed in the left-right direction above the worm gear 14. The worm gear 14 meshes and rotates the cam shaft 15. The cam shaft 15 is fitted with four cams 17, 18, 19, 20 which will be described in detail when explaining the operation. In FIG. 10, the cam at the right end is the motor control cam 17, and as shown in FIG. 2, the push button 22 of the normally open type micro switch 21 for turning the drive power on and off is brought into contact with the cam surface. The power is cut off when the push button 22 is fitted into the recess. A microswitch 21 and a non-locking type manual switch 23 provided on the grip 3 are connected in parallel to the power source by the battery described above to form a self-holding circuit. Therefore, if the motor 4 is started by pushing the manual switch 23 once, the motor control cam 17 rotates, the push button 22 of the micro switch 21 comes out of the recess of the cam 17 and turns on, and the manual switch 23 is pushed. The power is not turned off even if is released. Then, as the motor 4 rotates, the motor control cam 17 makes one rotation, the push button 22 is fitted into the recess of the cam 17, and the power is cut off. The bundling machine 1 is configured such that during one rotation of the motor control cam 17, the other three cams 18, 19, 20 are used to sequence-control a series of operations from wire feeding to bundling. There is.

A pawl clutch 24 having pawls on both front and rear surfaces is loosely fitted at an intermediate portion of the main shaft 11 by a feather key 25 so as to be movable on the main shaft 11, and a bevel gear 26 with a pawl capable of engaging with the pawl clutch 24. And a spur gear 27 with a claw are freely rotatably inserted in front of and behind the claw clutch 24. The claw bevel gear 26 meshes with a bevel gear 28 arranged above it, and as shown in FIG. 8, a spur gear 29 formed coaxially with the bevel gear 28 meshes with an opposing spur gear 30. The shaft of the spur gear 30 penetrates the upper partition wall 31 of the housing 2, and the driving roller 32 is fitted to the upper end portion thereof. The driving roller 32 is formed by engraving a V groove 33 in the circumferential direction at the center of the outer periphery of the spur gear, and meshes with a driven roller 34 of the same shape as shown in FIG. The wire is clamped and sent out.

The driven roller 34 is axially attached to one end of an opening lever 35 pivotally attached to the upper partition wall 31. As shown in FIG. 3, the opening lever 35 is provided with a coil spring 36, which is biased in the counterclockwise direction in the figure, and the driven roller 34 is brought into pressure contact with the main driving roller 32 to be meshed therewith. The other end of the opening lever 35 projects to the outside of the housing 2, and if the projecting portion is pressed toward the housing 2 and the opening lever 35 is rotated clockwise, the driven roller 34 moves from the driving roller 32. Separate. When using the binding machine 1, it is necessary to insert a wire between the two rollers 32 and 34, but if the opening lever 35 is operated to widen the distance between the two rollers 32 and 34, the wire is inserted. The tip of the can be easily inserted.

A guide tube 40 is arranged in front of the two rollers 32 and 34, and a rear end of the conduit is directed to a meshing portion of the two rollers 32 and 34. The guide tube 40 can slide back and forth within the housing 2 within a certain range, and as shown in FIG. 2, a coil spring 41 is interposed between the guide tube 40 and the housing 2, and the guide tube 40 is always urged forward. In the stopped state shown in (4), the stopper pin 42 provided on the housing 2 is engaged with the engaging portion 43 of the guide tube 40 and its forward movement is restricted.

One end of a cable wire 44 is fixed to the rear part of the guide tube 40, and the other end of the cable wire 44 is fixed to the front end of a guide tube return lever 45 pivotally attached to the rear part of the housing 2. There is. When the guide tube return lever 45 is rotated counterclockwise in the figure by the rotation of the guide tube return cam 20 of the cam shaft 15 described above, the guide tube 40 connected via the cable wire 44 is connected to the guide tube return lever 45. Pull back.

On the other hand, on the upper end plate 47 of the pulley 46 horizontally pivoted to the upper surface of the intermediate portion of the guide tube 40 shown in FIGS. An adjusting screw 49 is screwed onto the protrusion 48 in the rotation direction of the pulley 46. When the pulley 46 rotates clockwise in FIG. 3 by a cam mechanism described later, the head of the adjusting screw 49 pushes the stopper pin 42 to push it in, and the guide tube 40 is released from the movement restriction. At this time, the guide tube return lever 45 is not pressed by the guide tube return cam 20, and the guide tube 40 projects forward. Then, the protrusion 50 protruding laterally from the intermediate portion of the guide tube 40 shown in FIG. 2 collides with the stopper 51 provided in the housing 2 in front of the protrusion 50 and its movement is restricted.

Subsequently, at the end of the bundling operation, the guide tube return lever 45 is rotated by the guide tube return cam 20, the guide tube 40 is pulled back by the cable wire 44, and the stopper pin 42 engages with the engaging portion. By engaging 43, the guide tube 40 returns to the predetermined position shown in FIGS. 2 and 3. FIG. 11 is a vertical cross-sectional view of the main part of the guide tube 40, and shows two parallel guide paths 52, 53. The lower guideway is the wire guideway 52 and the upper side is the cable wire guideway 53 of the cutting mechanism. A flat cutter chamber 55 that crosses the guide paths 52 and 53 is provided near the tip of the curved portion 54 of the guide tube 40, and a guide pin 56 is provided upright in the wire path in the cutter chamber 55. The guide pin 56 is provided with a guide hole 57, which is a passage for the wire, and forms a relay path to an inclined guide hole 58 at the tip of the guide tube 40 described later.

A cutter plate 59 having a hole having substantially the same diameter as the guide pin 56 is loosely fitted in the guide pin 56, and one end of the cable wire 60 is locked to the end of the cutter plate 59. The other end is locked to the pulley 46. The cutter plate 59 is provided with an opening 61 at a portion corresponding to the vicinity of the inlet of the guide hole 57 of the guide pin 56, and a hole 62 for connecting the outlet of the guide hole 57 of the guide pin 56 and the inclined guide hole 58. It is provided. Therefore, in the state shown in the figure, the wire fed through the wire guide path 52 passes through the guide hole 57 of the guide pin 56, the hole 62 of the cutter plate 59, and the inclined guide hole 58, respectively, and is fed from the tip portion.

On the other hand, when the pulley 46 is rotated clockwise in FIG. 3, the cutter plate 59 is pulled by the cable wire 60 shown in FIG. 11 and the cutter plate 59 is rotated counterclockwise in FIG. Shear the wire by. As shown in FIG. 4, a pulley 63 is provided with a spring 63 to apply a rotational force in the counterclockwise direction in FIG. 3, and a lever 64 fixed to the lower portion of the pulley 46 by the operation of a cam 18 described later. When is not pressed, the cutter plate 59 is formed so as to return to the position shown in FIG.

As shown in FIGS. 12 and 13, the curved portion 54 of the guide tube 40 is provided with a guide groove 65 in parallel with the wire guide path 52. The guide groove 65 is a circular groove whose inner peripheral surface is open with a radius substantially the same as that of the wire guide path 52. The wire sent from the wire guide path 52 is circulated along the groove and wound around a target rebar. It is something to turn. Guide pieces 67, 67 which are widened to the left and right are provided at the introduction portion 66 of the guide groove 65, and the tip end of the wire fed from the wire guide path 52 is brought into contact with the guide pieces 67, 67 to guide the guide groove 65. I am trying to make sure that it can be introduced. Further, the tip end portion of the wire guide path 52 is displaced toward the introduction portion 66 of the guide groove 65 to form the inclined guide hole 58. As a result, the center of the left and right blurring of the delivered wire can be made to substantially coincide with the center of the introduction portion 66 in the width direction, and the wire collides with the guide pieces 67, 67 and rebounds to jump outward. It eliminates the failure in the winding stage of the binding work.

Next, a twisting mechanism for twisting and tightening the wound wire will be described. As shown in FIG. 2, the twisting mechanism 70 is arranged below the guide tube 40. The torsion mechanism 70 has a rear shaft 71 and a front shaft 72, which are divided into two parts, which are connected to each other by a coil spring 73, a ball clutch 75 formed by balls 74, 74. The spur gear 76 fitted to the above is meshed with the spur gear 27 with a claw that is loosely fitted to the main shaft 11 described above. An outer cylinder 77 is slidably fitted on the front shaft 72. As shown in FIG. 14, a hook 79 is inserted into a slit 78 provided on the outer cylinder 77, and an intermediate portion of the hook 79 is attached to a cotter pin 80. The fork 81 formed at the rear end of the hook 79 is inserted into the slot 82 at the tip of the front shaft 72 and is locked by the stop pin 83. Therefore, when the outer cylinder 77 is slid rearward with respect to the front shaft 72, the hook 79 is jumped up as shown in the figure. When the outer cylinder 77 is slid forward, the hook 79 rotates in the opposite direction and abuts on the tip of the outer cylinder 77. Only the abutting portion 84 is projected forward so that the wire can be sandwiched between the hook 79 and the tip of the outer cylinder 77.

Next, a cam mechanism that controls the operation of each of the above-mentioned mechanism parts will be described. FIG. 15 shows the three cams 17, 18 and 19 shown in FIG. 10. The clutch shift shaft 90 that engages with the clutch cam 19 has a roller 91 axially supported at the tip end thereof that abuts against the cam surface of the clutch cam 19. Touching. As shown in FIG. 2, the clutch shift shaft 90 extends below the cam shaft 15 and extends forward. As shown in FIG. 2 and FIG. 7, the clutch shift shaft 90 has a clutch shifter 92 fitted to the tip of the shaft. It is fitted in a groove portion 93 provided in the intermediate portion of the clutch 24. Further, the cutting / grasping cam 18 shown in FIG. 15 is in contact with a roller 101 pivotally supported on the tip of the shift shaft 100. The shift shaft 100 is provided with a pulley 46 of a wire cutting mechanism and a twisting mechanism 70. And the hook 79 of. As shown in FIGS. 3 and 4, the shifter 102 fixed to the tip of the shift shaft 100 is fitted into the groove 85 provided in the outer cylinder 77 of the twisting mechanism 70. Further, a pin 103 is provided so as to project upward from an intermediate portion of the shift shaft 100, and the pin 103 is made to face the rear surface of the lever 64 under the pulley 46 described above. The motor control cam 17 shown in FIG. 15 turns on / off the micro switch 21 as described above.

In the binding machine 1, the cam shaft 15 makes one rotation in the clockwise direction from the stopped state shown in FIG. 15 to perform one cycle process. Referring to the cam diagram of FIG. The operation of is explained. First, as shown in FIG. 1, a reel R on which a wire W is wound is mounted on a reel mounting portion 37 at the rear of the housing 2, and the tip of the wire W is inserted into an insertion tube 38 having an opening on the rear surface of the housing 2. .. Next, by pushing the release lever 35 shown in FIG. 3 to insert the wire W between the two rollers 32 and 34 and releasing the push of the release lever 35, the wire W is sandwiched between the two rollers 32 and 34. The work preparation is completed.

To perform the binding work, the curved portion 54 of the guide tube 40 shown in FIG. 1 is hung on the reinforcing bar (not shown) to be bound, and the manual switch 23 of the grip 3 is pushed (time A). As a result, the motor 4 is started, the spindle 11 is interlocked to rotate the motor control cam 17, the micro switch 21 is turned on, and one cycle operation is performed regardless of whether the manual switch 23 is on or off. . When the motor 4 is started, the clutch shift shaft 90 retracts from the neutral position (N in FIG. 16), the pawl clutch 24 meshes with the bevel gear 26 with pawls loosely fitted on the main shaft 11, and drives the roller 32. The wire W fed through the wire guide path 52 passes through the above-mentioned inclined guide hole 58 and is introduced into the guide groove 65, and is further wound around the reinforcing bar along the guide groove 65 for a predetermined number of turns.

Next, at time point B, the pawl clutch 24 returns to the neutral position, the rollers 32 and 34 stop, and the shift shaft 100 that engages with the cutting / grasping cam 18 advances and the wound wire W is wound. Is held by the hook 79. At the same time, the pin 64 provided at the intermediate portion presses the lever 64 at the lower portion of the pulley 46, and the wire W is sheared by the cutter plate 59 at the tip portion of the guide tube 40. Further, the adjusting screw 49 provided on the upper portion of the pulley 46 presses the stopper pin 42 to release the lock of the guide tube 40, and the guide tube 40 is projected forward by the bias of the coil spring 41. Since the guide tube 40 has moved forward of the wire wound around the reinforcing bar, when the binding machine 1 is pulled backward, the wire W wound around the reinforcing bar is tensioned by the hook 79. This makes it possible to make the tightening force of each turn uniform when the wire wound multiple times is twisted.

Next, at time point C, the claw clutch 24 meshes with the claw spur gear 27 to rotate the twisting mechanism 70, and the wire W held by the hook 79 is twisted to bind the reinforcing bars. Then, the pawl clutch 24 returns to the neutral position, the rotation of the twisting mechanism 70 is stopped, the shift shaft 100 is retracted, the hook 79 is raised, and the clamped wire W is disengaged. (Time point D).

Subsequently, the guide tube return cam 20 shown in FIG. 2 presses the guide tube return lever 45 and rotates, and the guide tube 40 retracts (time point E). When the guide tube 40 retracts to the position shown in FIG. 2, the stopper pin 42 provided on the housing 2 side projects and engages with the engaging portion 43 of the guide tube 40. After that, the guide tube return cam 20 releases the pressure of the guide tube return lever 45 to release the tension of the cable wire 44, and the motor control cam 17 turns off the micro switch 21 to turn off the power source and perform one cycle. The binding work is completed (time point F). In this way, the work of winding the wire around the reinforcing bar, twisting it, and binding it is done automatically.

Next, the details of the ball clutch 75 will be described. As shown in FIG. 17, the ball clutch 75 is arranged in front of the ball receiving plate 110 fixed to the rear shaft 71, the intermediate block 111 fixed to the rear end of the front shaft 72, and the intermediate block 111. The pressure adjusting plate 112 is slidable on the front shaft 72. In the intermediate block 111, holes 113, 113 ... Penetrating in the front-rear direction are arranged in the circumferential direction at a constant distance from the axis and at constant intervals, and the ball receiving plate 110 and the pressure adjusting plate 112 have the holes 113, 113, respectively. Receiving holes 114, 114, ..., 115, 115, ... Are provided at positions corresponding to. Coil springs 73, 73 ... Are respectively inserted into the holes 113, 113 ..., Push pins 116, 116 ... Are inserted in the front part, and balls 74, 74 ... Are inserted in the rear part, and the tip ends of the balls 74, 74. Are fitted into the receiving holes 114, 114 of the ball receiving plate 110 by the urging force of the coil springs 73, 73, and the push pins 116, 116 ... project forward to receive the receiving hole 115 of the pressure adjusting plate 112. , 115 ... Therefore, the ball receiving plate 110 and the intermediate block 111 are coupled via the balls 74, 74, ... And the rotation of the rear shaft 71 is transmitted to the front shaft 72. Here, when the front shaft 72 is forcibly prevented from rotating, the balls 74, 74 ... From the receiving holes 114, 114 ... into the holes 113, 113 ... of the intermediate block 111 due to the rotational torque of the rear shaft 71. When pushed in, the rear shaft 71 is not blocked from rotating.

To adjust the transmission torque limit value of the ball clutch 75 having such a torque limiting function, the compression amount of the coil springs 73, 73 ... It is performed by adjusting and adjusting the pressure contact force of the balls 74, 74, ... To the ball receiving plate 110. Subsequently, a torsion torque adjusting device for adjusting the pressure contact force will be described. As shown in FIG. 17, a male screw 121 having a center hole 120 is loosely fitted in the rear portion of the front shaft 72, and the front portion of the male screw 121 is fixed to a bearing portion of the housing 2. A gear 123 having a female hole 122 cut in the center hole is screwed into the male screw 121, and the pressure adjusting plate 112 of the ball clutch 75 is driven by the coil springs 73, 73 ... It is pressed against the rear end surface of 123. When the gear 123 is rotated, the gear 123 moves forward or backward on the male screw 121 depending on the rotation direction, and the transmission torque limit value is adjusted by interlocking with the pressure adjusting plate 112.

As shown in FIGS. 3 and 5, an opposed gear 125 is arranged adjacent to the adjustment gear 123, and the opposed gear 125 is meshed with the gear 123, and as shown in FIG. The shaft 126 to which 125 is fitted penetrates the step portion 2a provided on the left side surface of the housing 2 and projects forward, and the adjustment knob 127 is fixed to the tip. The shaft 126 is slidable in the axial direction. As shown in FIG. 18, a flange 128 is fixed to an intermediate portion, and a coil spring 129 mounted on the shaft 126 is provided with a rear bearing portion 130 as a fulcrum to move the flange 128 forward. When pressed, the manual adjustment mechanism including the opposed gear 125, the shaft 126, and the adjustment knob 127 is biased forward.

A recess 131 is formed in a portion of the side surface of the housing 2 corresponding to the adjusting knob 127, and the outer peripheral surface of the adjusting knob 127 is partially recessed in the recess 131. As shown in FIG. 19, notches 132, 132 ... Are provided at the front end of the outer peripheral surface of the adjusting knob 127, while engaging portions 133 corresponding to the notches 132, 132 ... Are provided at the front end of the recess 131. ing. Accordingly, the adjustment knob 127 biased forward by the coil spring 129 has the notches 132, 132 ... Fit into the engaging portion 133 of the recess 131, and the rotation of the opposed gear 125 is blocked.

When adjusting the torsional torque, the adjusting knob 127 is pushed backward to release the engagement between the cutout portion 132 and the engaging portion 133, and the adjusting knob 127 is rotated in this state. The adjustment gear 123 can be interlocked to perform torque adjustment. When the adjustment knob 127 is released after the adjustment is completed, the adjustment knob 127 is projected forward by the bias of the coil spring 129 and is pressed against the engaging portion 133. If the cutout portion 132 and the engagement portion 133 are not fitted to each other due to the relative rotation angle, the cutout portions 132, 132, ... Can be rotated by rotating the adjusting knob 127 in any direction. It is automatically fitted and locked in the lock, and it does not rotate accidentally during binding work, etc., and fluctuations in the torque setting are prevented.

Incidentally, the pawl means of the opposed gear 125 should not be limited to the above-described embodiment, and although not shown, for example, by embedding a ball and a ball in the front wall surface of the recess 131 as in the ball clutch. A detent mechanism in which the ball is urged outward and a ball receiving hole is provided in the front end surface of the adjusting knob 127 to press the ball into contact may be used, and various pawl means can be applied.

The present invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention covers those modifications.

[0037]

[Effect of the device]

 As described in detail in the above-mentioned one embodiment, this invention does not require a special adjusting tool or the like, and the torsion torque can be easily adjusted from the outside of the binding machine. In addition, since the manual adjustment mechanism is prevented from idling by ratchet means such as a ratchet, the torque setting does not change due to the adjustment knob rotating unintentionally during use, and operability, stability, and maintenance are maintained. This is a device with practical value that significantly improves workability.

[Brief description of drawings]

FIG. 1 is a side view of a binding machine with side plates removed.

FIG. 2 is an enlarged view of a housing portion of FIG.

FIG. 3 is a plan view in which a top plate of the housing is cut away.

FIG. 4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a sectional view taken along the line BB of FIG.

FIG. 6 is a sectional view taken along the line C-C of FIG.

FIG. 7 is a sectional view taken along the line D-D of FIG.

FIG. 8 is a cross-sectional view taken along the line EE of FIG.

FIG. 9 is a sectional view taken along the line FF of FIG.

FIG. 10 is a sectional view taken along the line GG in FIG.

FIG. 11 is a partially cutaway left side view of the guide tube.

FIG. 12 is a bottom view of a main part of the guide tube.

FIG. 13 is a right side view of the guide tube.

FIG. 14 is a partially cutaway plan view showing a main part of a twisting mechanism.

FIG. 15 is a side view of a motor control cam, a disconnection / grasping cam, and a clutch cam.

FIG. 16 is a cam diagram showing the operation timing of each cam.

FIG. 17 is a partially cutaway side view showing a ball clutch.

FIG. 18 is a partially cutaway side view showing a manual adjustment mechanism.

FIG. 19 is a perspective view of a main part showing the shapes of an adjusting knob and a recess.

[Explanation of symbols]

 1 Bundling machine 40 Guide tube 70 Twisting mechanism 71 Rear shaft 72 Front shaft 75 Ball clutch 112 Pressure adjusting plate 120 Center hole 121 Male screw 122 Female screw 123 Gear 125 Opposing gear 126 Shaft 127 Adjusting knob 132 Notch 133 Engaging part

Claims (1)

[Claims for utility model registration] 1. The wire W is fed into the guide tube 40 by a wire feeding mechanism, the front part of the guide tube 40 is curved in an arc shape, and the wire W is wound a plurality of times on a reinforcing bar or the like. The wire W is rotated and cut by the cutting mechanism to a predetermined length, the wound wire W is twisted by the twisting mechanism 70, and the above mechanical parts are sequentially controlled to perform a series of binding work. In the binding machine 1, in which the shafts 71 and 72 of the twisting mechanism 70 are divided into two, and a transmission torque limiting means such as a ball clutch 75 is interposed, a central hole 120 is opened in a male screw 121. Then, the male screw 12 is loosely fitted to one shaft 72 of the twisting mechanism 70.
1 is fixed to the bearing portion, and the female screw 1 is inserted in the center hole of the gear 123.
22 is engraved, the gear 123 is screwed into the male screw 121, the end surface of the gear 123 is brought into contact with the transmission torque limiting means, and the counter gear 125 is provided to dispose the gear 12
3 and the shaft 126 of the opposed gear 125 is penetrated to the outside of the housing 2 to form a manual adjustment mechanism so that the clutch pressure of the transmission torque limiting means can be adjusted. A twisting torque adjusting device for a binding machine, wherein a detachable pawl means is provided to prevent rotation of the gear 123.