JPH0627525Y2 - Tie release device for binding machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a string grasper releasing device applied to a binding machine for binding fruit tree branches in a horticultural work of fruit trees such as grapes and apples. .

[Prior Art and its Problems] Conventionally, as a binding machine of this type, for example, Japanese Patent Publication No. 52-4
The binding machines described in the specifications such as No. 2689 and Jitsuko Sho 53-15673 are known.

This binding machine uses a relatively thin tape as a binding material, forms a loop surrounding an object to be bound at the end of this tape, staples the overlapping portion of this loop, and at the same time continuously loops this loop portion. To disconnect from.

In this binding machine, the tape grip release device is provided on the binding arm side and holds and holds the tape end by the shallow contact of the first stage with the machine side equipped with the stapling mechanism, and the second deeper than this. It is configured to clinch the tape ends by step contact and then cut and release.

By the way, in this type of binding machine, the overlapping portion of the thin tape is bound by stapling with staples formed of relatively thin wire. For this reason, the binding force is weak and cannot be used for binding work that requires a strong binding force.

As a device that can obtain a strong binding force, there has already been proposed a binding machine in which a string is used as a binding material and a staple having a large wire diameter is used to wrap and clinch the circumference of the string.

However, in this binding machine, since the clinch operation of the staples is manually performed by the handle operation, a large operation force is required and there is a problem that it is not suitable for continuous work for a long time.

Therefore, in order to obtain a relatively strong binding force, a string is used as a binding material, and the labor of a worker is reduced in a binding machine configured to bind the overlapping portion formed by looping the loop with the staple. Therefore, it is considered that the stapling mechanism is driven by a motor.

In such a motor-driven binding machine, an operation of grabbing the binding cord on the binding arm side, a trigger operation of operating the stapling mechanism, and further releasing the grip portion of the cord after the binding is completed to end the cord after binding. It is necessary to release the lever and wait for the next holding operation at the releasing position.

However, in such a mechanism, the gripping force of the cord is larger than that using a thin tape, and accordingly, the operating force for releasing it is also larger. For this reason, there is a problem in that it is not suitable for long-time work to do this by manual handle operation as in the conventional case.

The present invention has been made in view of the above circumstances, and an object thereof is to be able to automatically perform a gripping and releasing operation of a string together with a stapling mechanism by a motor drive, and prevent an erroneous operation with a simple operation. You can reduce your power,
It is an object of the present invention to provide a strapping release device for a binding machine that is suitable for long-term work.

[Means for Solving the Problems] A cord catching / releasing device of a binding machine according to the present invention for solving the above-mentioned conventional problems winds an overlapping portion of a binding cord which forms a loop by surrounding a bound object. A machine body having a stapling mechanism for tightening and clinching, a binding arm provided so as to be relatively movable toward and away from the machine body, an operation handle for operating the binding arm, and a gripping and releasing of the binding cord. A binding machine comprising a grip release device for performing an operation and a drive mechanism for driving the stapling mechanism, wherein the grip release device is provided on the binding arm and is always elastically biased in a string grip direction. A gripping member for gripping, an embodiment member that engages with the gripping member to hold the gripping member in the string releasing position, and a member provided at a position facing the holding member on the machine body side. An operating member which is engaged with the holding member to release the engaged state between the holding member and the gripping member and which is operated from the engaged position to the non-engaged position by the drive mechanism; and the grip of the machine body. The gist of the present invention is that the member is provided at a position corresponding to the front side of the gripping direction of the member, and is constituted by a gripping releasing member that moves the gripping member in the string releasing direction by the drive mechanism to release the binding string.

[Operation] In the string grasping release device of the binding machine having the above configuration, when the binding arm is closed, the tip end of the holding member on the binding arm side engages with the actuating member on the machine side, whereby the holding member and the holding member are held. When the engagement state with the member is released, the gripping member moves toward the gripping release member, and automatically grasps the tip end of the binding cord led out above the actuating member. Then, after the binding arm is opened and the binding string is stretched, the binding object is inserted between the machine body and the binding arm in a manner of being pushed inward, and then the binding arm is closed again and the clinch process by the stapling mechanism is performed. When is finished, the grip release member engages with the grip member and moves the grip member in the string release direction against the biasing force. As a result, the tip portion of the binding cord is released, and the binding cord is released together with the object to be bound. Further, at the same time when the string of the gripping member is released, the actuating member is actuated from the engaging position with the holding member to the non-engaging position by the drive mechanism, so that the engaged state between the actuating member and the holding member is released. At the same time, the holding member engages with the grip member and holds the grip member in the original string releasing position.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an overall configuration of a binding machine according to an embodiment of the present invention. In the figure, the binding machine 1 includes a machine body 2, a binding arm 3, an operation handle 4 and a drive mechanism 5.

The machine body 2 is provided with a stapling mechanism 7 as shown in a broken manner in FIG. 2, and by this stapling mechanism 7, an object to be bound, for example, a superposed portion of a binding string 6 that forms a loop around a branch of a grape is formed. Clinch is done by tightening.

The binding arm 3 has its machine end rotatable with respect to the machine body 2 via a support shaft 8, and its head 3a is provided so as to be relatively movable toward and away from the machine body 2. The bundling arm 3 is biased by a return spring (not shown) in the direction of separating from the machine body 2 side, and is held at the open position shown in FIGS. 1 and 2 in the unused state.

The operation handle 4 is for operating the binding arm 3 with respect to the machine body 2 so that the binding arm 3 can be moved toward and away from the machine body 2. The operation handle 4 is formed in a substantially V shape, one end of which is an operation end, and the other end of which is engaged with the guide shaft 10 of the machine body 2, and the central bent portion 4 a is connected via the pivot shaft 11. It is pivotally attached to the middle of the binding arm 3. That is, the gripping operation of the operation handle 4 causes the binding arm 3 to rotate in the direction from the open position toward the machine body 2, and the head 3a of the contact binding arm 3 is brought into contact with the machine body 2 side. The position (closed position) of the binding arm 3 is shown by a chain double-dashed line in FIG.

The drive mechanism 5 is provided on the rear portion of the machine body 2 and drives the stapling mechanism 7 based on the operation of a trigger mechanism described later to bind the binding cord 6.

The string grip releasing device that grips the end of the binding string 6 is configured by a grip member 12 and a holding member 13 provided on the binding arm 3 side, and an actuating member 16 and a grip release member 17 provided on the machine body 3 side. .

The gripping member 12 is for gripping a string, and the holding member 13 is slidable up and down to hold the gripping member 12 in the string releasing position. As shown in FIG. 3, the gripping member 12 has a distal end portion as an engaging portion 12a, and a proximal end side is rotatably provided via a pivot shaft 9 provided on the binding arm 3 and one end thereof is attached to the binding arm 3. The other end of the fixed compression coil spring 14 is rotationally biased clockwise around the pivot shaft 9. That is, the engaging portion 12a is always biased in the string gripping direction.

Further, a grip portion 12b is provided in the vicinity of the engaging portion 12a of the grip member 12, and the grip portion 12b comes into contact with an engaging portion 13a provided on the distal end side of the holding member 13 so that the grip member 12 is held. Is held in the string release position.

The machine end of the holding member 13 is attached to the other end of the compression coil spring 15 whose one end is fixed to the bundling arm 3, and the engaging portion 13a is normally located at the lowered position facing the grip portion 12b of the grip member 12. The holding member 12 is held in the release position shown in FIG. 3 against the elastic force of the compression coil spring 14. Note that 13b is a stopper that regulates the lowered position of the holding member 13.

As shown in FIG. 2, the operation member 16 on the machine body 2 side is provided at a position facing the holding member 13 on the binding arm 3 side.

The lower end of the actuating member 16 is pivotally attached to the tip of the machine body 2 via a pivot shaft 16a, and the upper end of the actuating member 16 is normally held by the cooperation of the winding spring 16b and the stopper 16c engaging with the machine body 2. The cutter slider 20 is held at a position (contact position) shown in FIG.
As a result, the coil spring 16b is moved to rotate counterclockwise from the contact position against the elastic force of the coil spring 16b so as to be positioned at the non-contact position.

Further, the grip release member 17 is rotatably provided via a pivot shaft 18 fixed to the machine body 2 as shown in FIG. The grip release member 17 is provided with a guide groove 19 forming a positive cam groove, and an engaging shaft 21 forming a cam follower provided on the cutter slider 20 side is slidably fitted into the guide groove 19. Has been done.

The cutter slider 20 is also actuated by the drive mechanism 5 in the string grasping direction in synchronization with the timing of releasing the string after the stapling mechanism 7 has finished the clinch process by the drive mechanism 5. As the cutter slider 20 moves, the engagement shaft 21 moves from one end to the other end in the guide groove 19, whereby the grip release member 17 rotates clockwise about the pivot shaft 18 in FIG. To do.

A release portion 17a is bent and formed at the tip of the grip release member 17. The releasing portion 17a is arranged in front of the holding member 3 on the side of the binding arm 3 in the holding direction, and when the binding string 6 is released, the holding release member 17a is released.
Is moved to the gripping member 12 side in accordance with the rotation of the gripping member 12 and is engaged with the gripping portion 12a to rotate the gripping member 12 in the releasing direction as shown by the one-dot chain battle in FIG.

A cord guide mechanism 22 for feeding the binding cord 6 to the grip release device is provided on the lower side of the machine body 2. As shown in FIG. 2, the cord guide mechanism 22 is composed of a cord guide unit 24 having a supply guide path 23 extending along the longitudinal direction and inclined with respect to the machine body 2, and a feed plate 25. Thus, the binding cord 6 inserted from the rear end portion protruding from the machine body 2 is fed to the supply guide path 23.

The string guide unit 24 has a rear end portion pivotally attached to the machine body 2 via a pivot shaft 24a and a front end portion arranged so as to face the gripping mechanism 9. In addition, supply guideway 2
A check spring 26, which is a leaf spring for preventing the binding string 6 from returning, is provided in the inside 3.

The feed plate 25 enters the supply guide path 23 through an opening 27 that communicates with the supply guide path 23 in the horizontal direction, and moves forward, that is, moves leftward in FIG. Occasionally, the binding string 6 slides with respect to the binding string 6, and the binding string 6 is held by the non-return spring 26 at the feeding position. The feed plate 25 is integrally provided at the tip of the feed plate operating lever 28. The feed plate actuating lever 28 is moved back and forth by a feed lever 38, which will be described later, in response to the contacting / separating movement of the binding arm 3. When the operation handle 4 is opened, that is, the binding arm 3 moves toward the opening. It operates to move the feed plate 25 forward. The feed plate operating lever 28 includes the lever 2
A spring 28a for urging 8 in the feed direction is stretched between the machine body 2 and the spring 28a.

The stapling mechanism 7 is composed of a magazine unit 29 in which a large number of staples 29a are arranged as shown in FIG. 2 and a clinch mechanism 30 taken out and shown in FIG.

The clincher mechanism 30 includes a pair of left and right clincher units 31 for deforming the staples 29a sequentially fed to the clinching portion at the front end of the magazine unit 29 into a ring shape.
And a pair of links 33 for opening and closing the clincher unit 31 around the shaft 32, and a clincher slider 34 for operating the links 33. The clincher slider 34 is connected to the drive mechanism 5 at its base end and is driven by the drive mechanism 5.
In the figure, the clincher unit 3 moves to the left.
1 is closed with each other to perform clinching.

As shown in FIG. 4, the machine body 2 is further provided with a cutter member operation selecting mechanism 35. The cutter member operation selection mechanism 35 includes a cutter holder 36 and the cutter slider 20 described above.
And a cut lever 37.

The cutter holder 36 is provided with a cutter 36 a between the clinch portion of the stapling mechanism 7 and the supply guide path 23 of the string guide unit 24, so that the binding string 6 stretched between the clinch portion and the supply guide path 23 can be secured. It is designed to disconnect after the clinch operation is completed. The cutter holder 36 is arranged to face the lower surface of the cutter slider 20. The cutter slider 20 is adapted to be operated in cooperation with the stapling mechanism 7 by the drive mechanism 5 that drives the stapling mechanism 7. A cut lever 37 is provided between the cutter slider 20 and the cutter holder 36 to select either the interlock or the interlock. The cut lever 37 is bent into an L-shape, and the central bent forming portion is pivotally attached to the cutter holder 36 via a pivot shaft 38, and one lever piece serves as an operating end 37a of the outside of the machine body 2. It is projected toward. At the tip of the other lever piece of the cut lever 37, an engaging projection 37b is provided at a right angle to the plate surface of the cut lever 37, that is, toward the cutter slider 20. On the other hand, the cutter slider 20 facing the engaging projection 37b is provided with an engaging small hole 20a, and an elongated hole 20b communicating with the engaging small hole 20a and extending in the longitudinal direction. ing. That is, the engaging projection 37 of the cut lever 37
When b is engaged with the engagement small hole 20a as shown in FIG. 4, the cutter slider 20 and the cutter holder 36 are interlocked with each other via the cut lever 37, that is, the cutter 36.
It becomes the operating state of a. Further, when the cut lever 37 is rotated clockwise to displace the engagement protrusion 37b from the engagement small hole 20a into the elongated hole 20b, the engagement protrusion 37b can freely move relatively in the elongated hole 20b. The engagement state between the cut lever 37 and the cutter slider 20 is released, the driving force of the cutter slider 20 is not transmitted to the cutter holder 36, and the cutter 36a remains in the inoperative state in spite of the movement of the cutter slider 20. It has become. In this way, the structure for selectively operating the cutter 36a does not always cut the clinched binding cord 6 at the end of the binding process as will be described later. The binding string 6 is stretched between the binding object and the object to be bound and can be suitably used for work such as attracting branches.

A coil spring (not shown) is attached to the other end of the cutter slider 20 between the cutter slider 20 and the machine body 2 to urge the cutter slider 20 in the direction opposite to the cutter holder 36, that is, in the backward direction. The cut lever 37 is designed so as not to be easily rotationally displaced from the illustrated interlocking position.

Further, the binding machine is provided with a trigger mechanism for operating the stapling mechanism 7. That is, as shown in FIG. 6, a feed lever 38 interlocking with the binding arm 3 is attached to the machine body 2 so as to be rotatable around the support shaft 8. A central portion of a one-cycle on lever 39 is pivotally attached to one lever end portion of the feed lever 38 via a pivot shaft 40, whereby the one-cycle on lever 39 is interlocked with the opening / closing movement of the binding arm 3. Then, it can reciprocate in the machine body 2 in its longitudinal direction.

The one-cycle on-lever 39 moves forward as shown by the chain line when the binding arm 3 is set to the open position with respect to the machine body 2 in response to the operation of the operation handle 4.
Position, and when the bundling arm 3 is set to the closed position where it abuts against the machine body 2, it is moved backward from the first position in the horizontal direction to the second position as shown by the solid line. To be done.

A trigger switch 41 is provided just below the one-cycle ON lever 39 in the second position. The trigger switch 41 is turned on by the clockwise rotation of the one-cycle on-lever 39 around the pivot shaft 40 to activate the drive mechanism 5.

The turning operation of the one-cycle on-lever 39 is manually performed by the trigger lever mechanism 42. The trigger lever mechanism 42 is composed of a trigger 43 and a trigger lever 44.

The trigger 43 forms a manually operated end and is rotatably held on the machine body 2 via a pivot shaft 45 at the base end portion thereof, and a return spring 45 a stretched between the trigger 43 and the machine body 2 causes the shaft 45 to rotate. The return spring 45 is urged in the clockwise direction to the inoperative position shown in the figure in which the airframe 2 and the stopper 43a are engaged.
It is held against a. The trigger lever 44 is rotatably held in a guide recess 43b formed in the trigger 43 via a pivot shaft 46. The trigger lever 44 has an engaging portion 44a extending inward of the machine body 2 and is constantly urged clockwise around a shaft 46 by a compression coil spring 47 arranged between the trigger lever 44 and the trigger 43, and has a guide recess. Place 4
It is held against the compression coil spring 47 in the illustrated original position where the bottom surface of 3b and the stopper 44b are engaged.

An operating end 44c is integrally provided on the side surface (rear surface in the drawing) of the trigger lever 44 at right angles to the plate surface of the trigger lever 44. The operating end 44 of this trigger lever 44
An engaging portion 48 is provided at the tip of the one-cycle on lever 390 so as to face c. That is, when the one-cycle on-lever 39 is in the second position and the trigger 43 is gripped and rotated counterclockwise, the operating end 44 a of the trigger lever 44 causes the engaging portion 4 of the one-cycle on-lever 39 to move.
8 is engaged from below to rotate the one-cycle on lever 39 clockwise. As a result, the rear end of the one-cycle on-lever 39 comes into contact with the trigger switch 41 to be turned on. Reference numeral 49 is a stopper for setting the one-cycle on lever 39 to the horizontal position. On the other hand, when the one-cycle on-lever 39 is in the first position, that is, when the binding arm 3 is in the release position and the trigger lever mechanism 42 should not be operated, the trigger 43 is erroneously operated. 44
On the other hand, since the engaging portion 48 of the lever 39 is placed at a position not corresponding to the lever 39, the lever 39 is not rotated at all. Therefore, in this case, the trigger switch 41 is not turned on.

With this configuration, the binding handle of the binding machine is
Is operated to bring the binding arm 3 into contact with the machine body 2 in the closed position, that is, the one-cycle on-lever 39
If the trigger 43 is not operated after the is set to the second position, the trigger switch 41 will not be turned on.
This prevents erroneous operation.

Next, a one-cycle operation mechanism for surely stopping the drive mechanism 5 for each binding operation will be described. First, the drive mechanism 5 includes a drive motor 50 installed in the rear portion of the machine body 2 as shown in FIG. 7, and a crank plate 53 connected to a motor shaft 50a of the drive motor 50 via a reduction gear mechanism 51. It is configured.

As shown in FIGS. 7 and 8, on one side surface of the crank plate 53, an engagement protrusion 54 forming a cam follower is provided at an eccentric position with respect to the rotation shaft 52 of the crank plate 53. The engaging protrusion 54 is fitted into a cam hole 55 which is a positive cam groove provided at the rear end of the clincher slider 34, and constitutes an operating crank which converts rotational motion into reciprocating linear motion. The cam hole 55 is formed at a right angle to the horizontal movement direction of the clincher slider 34. Each time the crank plate 53 makes one clockwise rotation from the initial position shown, the clincher slider 34 reciprocates back and forth once.

Further, on the other surface side of the crank plate 53, 1 along the diametrical direction with respect to the central shaft 52 and the engaging projection 54 and the shaft 52.
Engagement protrusions 56 are provided at positions different by 80 degrees. After the clincher slider 34 moves forward with the rotation of the crank plate 53 and the clinching by the stapling mechanism 7 is completed, the clincher slider 34 retracts as the crank plate 53 rotates further from the counter rotation position. At this time, the cutter slider 20 is moved forward by contacting the operating end member 20c provided at the rear end of the cutter slider 20 positioned corresponding to the engaging projection 56. As a result, the cutter 36a is selectively operated as described above.

At the rear of the crank plate 53, a one-cycle off lever 58 is provided which is rotatable via a pivot shaft 57 while being constantly engaged with the rear end of the clincher slider 20. The operating end 5 provided at one end of the one-cycle off lever 58
A gear switch 59 is arranged at a position facing 8a. Further, a tension coil spring 60 is attached to the other end side of the one-cycle off lever 58 for urging the operating end 58a in a direction in which the clincher slider 20 is constantly engaged.

The gear switch 59 turns on the trigger switch 41, and the drive motor 50 drives the one-cycle off lever 58 to rotate in the counterclockwise direction as the clincher sillada 34 starts moving in the forward direction. Is immediately turned on in the clincher slider 3
At the end of the bundling stroke accompanying the return of No. 4, the one-cycle off lever 58 is turned off by rotating and returning in the clockwise direction against the biasing force of the tension coil spring 60.

On the other hand, when the trigger lever mechanism 42 is actuated and the trigger 43 is pushed, the trigger lever 44 also moves integrally as described above, and the actuating end 44c pushes up the engaging portion 48 of the corresponding one-cycle on lever 39, A case will be described in which the trigger switch 41 is turned on, but the trigger 43 is held in a state of being pushed in by the operator thereafter. In such a trigger operating state, the trigger lever 44
The engaging portion 44a of FIG. 6 is located in the engaging recess 34a formed in the clincher slider 34, as shown by the chain double-dashed line in FIG. Therefore, as described above, when the clincher slider 34 starts to advance the binding stroke, the engagement recess 34a resists the compression coil spring 47 in the counterclockwise direction in FIG. Is rotated independently of.
Therefore, the operating end 44c is forcibly disengaged from the engaging portion 48, and the trigger switch 41 is automatically turned off. That is, even if the operator holds the trigger 43, the operation of the binding machine is surely stopped after the end of one cycle. As described above, the timing for automatically turning off the trigger switch 41 is set so as to be set after the gear switch 59 is turned on.

FIG. 9 shows a circuit configuration of the drive mechanism 5.
In the figure, a main switch 62, a relay contact 63, and a drive motor 50 are connected in series between the positive side terminal and the negative side terminal of the DC power supply 61, and the main switch 6
A parallel circuit of the trigger switch 41 and the gear switch 59 and the relay coil 64 are connected in series between the 2 and the negative terminal. The relay coil 64 has a diode 65
Are connected in parallel.

Next, the operation of the binding machine having the above configuration will be described. First
FIG. 0 shows a time chart of this operation. First, in the state before the start of bundling, the bundling arm 3 is at the open position, and the clincher slider 34 and the cutter slider 20 are at the retracted original position or the inoperative position, respectively. Further, the gripping member 12 of the gripping mechanism 9 has the gripping portion 12b in contact with the engaging portion 13a of the holding member 13 biased by the compression coil spring 15, and is in the string-released state.

First, staples 29a are loaded into the magazine unit 30 from an insertion opening (not shown), the staples 29a are sent between the clincher units 31 opened by the pushers 30a, and the feed guide path 2 of the cord guide unit 24 is also fed.
The binding cord 6 is inserted through the rear insertion port of the cable 3, and the binding cord 6 is led out above the actuating member 16 in front of the supply guide path 23 to complete the binding preparation.

In this state, the main switch 62 is first turned on to bring the one-cycle operating mechanism into a ready state for operation. Then, when the operation handle 4 is operated so as to be closed, the operation handle 4 rotates clockwise about the pivot shaft 11 of the bent portion 4a, and the circular arc portion 4b at the other end pivots. Slide along. Then, in conjunction with this, the binding arm 3 rotates counterclockwise about the pivot shaft 8 to reach the closed position.

When the binding arm 3 is closed, the tip of the holding member 13 on the binding arm 3 side abuts on the upper end of the actuating member 16 on the fuselage 2 side as shown in FIG. 11, so that the holding member 13 is compressed. It is pushed upward against the elastic force of the coil spring 15. As a result, the engagement state between the grip portion 12b of the grip member 12 and the engagement portion 13a of the holding member 13 is released, and as a result, the grip member 12 is released by the elastic force of the coil spring 14 about the pivot shaft 9. It rotates in the direction of the member 17 and automatically grips the tip of the binding cord 6.

Then, when the operation handle 4 is released, the binding arm 3 is opened by the restoring force of the return spring (not shown), and the open state of FIG. 1 is restored.

In the process of opening the binding arm 3, the feed plate operating lever 28 is actuated, the feed plate 25 attached to the tip of the feed plate operating lever 28 advances in the supply guide path 23, and the binding string 6
Send forward. At the same time when the binding cord 6 is sent out, the gripping member 12 rises while holding the binding cord 6 so that the binding cord 6 is stretched between the cord guide unit 24 and the open binding arm 3.

After the binding cord 6 is stretched by closing and opening the operation handle 4 in this manner, the binding cord 6 stretched with the object 66 to be bound is pushed inward as shown by the alternate long and short dash line in FIG. In a state where the binding arm 6 is inserted between the machine body 2 and the binding arm 3 and the binding string 6 is partially wound around the binding object 66, the operation handle 4 is operated again to close the binding arm 3 in the closed position. To activate.

As a result, the binding cord 6 is wrapped around the object 66 to be bound in a loop shape, and the overlapping portion of the binding cord 6 is pushed into the staple 29a fed between the pair of open clincher units 31.

Next, when the trigger 43 is operated, the trigger 43 rotates about the pivot shaft 45, and at the same time, the trigger lever 44 rises, and its operating end 44a engages with the engaging portion 48 of the one-cycle on lever 39. The one-cycle on lever 39 rotates about the pivot shaft 40. As a result, the rear end of the one-cycle on lever 39 contacts the trigger switch 41, and the trigger switch 41 is turned on.

When the trigger switch 41 is turned on, the relay 64 shown in FIG. 9 is driven and the relay switch 63 is turned on, so that the power supply 61 is supplied to the drive motor 50.

As a result, the drive motor 50 rotates and the drive motor 5
The rotational force of 0 is transmitted to the crank plate 53 via the reduction gear mechanism 51.
Be transmitted to.

Then, due to the engagement between the engagement protrusion 54 and the cam hole 55 of the clincher slider 34, the rotational movement of the crank plate 53 is transmitted to the clincher slider 34 as a linear movement, and the slider 34 advances. The clincher slider 34 moves the forward stroke from the rear end portion to the front end portion by rotating the crank 53 by 180 degrees, and moves the return stroke from the front end portion to the rear end portion by further rotating by 180 degrees. In the process of the clincher slider 34 moving forward, the clincher unit 31 is moved through the link 33.
Is closed, and the overlapping portion of the binding cord 6 is bound by the staples 29a. Further, as the clincher slider 31 moves forward, the elastic force of the tension coil spring 60 causes the one-cycle off lever 58 to rotate counterclockwise about the pivot shaft 57, and the tip portion 58 of the one-cycle off lever 58.
a contacts the gear switch 59. This turns on the gear switch 59. Next, clincher slider 3
Simultaneously with the retreat of 4, the engaging projection 56 provided on the lower surface of the crank 53 comes into contact with the operating end member 20c provided at the rear end of the cutter slider 20, whereby the cutter slider 20 starts to move forward.

Here, when the portion of the binding string 6 where the objects 66 to be bound are bound is cut off, the cutter lever 37 is brought into the state shown in FIG. 4 and the cutter slider 20 and the cutter holder 36 are brought into an interlocking state. As a result, the cutter holder 36 moves forward as the cutter slider 20 moves forward, and the cutter 36a cuts a single portion between the overlapped portion of the binding string 6 and the front end of the string guide unit 24. .

On the other hand, as the cutter slider 20 advances, the engagement shaft 21
Moves from the rear end of the guide groove 19 of the grip release member 17 to the front end. With the movement of the engagement shaft 21, the grip release member 17 rotates clockwise around the pivot shaft 18 in FIG. 4, and the release portion 17 a engages with the engagement portion 12 a of the grip member 12. , The gripping member 12 is moved in the string releasing direction against the biasing force of the compression coil spring 14. As a result, the tip end portion of the binding cord 6 is released, and the cut portion of the binding cord 6 is released together with the binding object 66. Further, at the same time when the cord of the gripping member 12 is released, the cutter slider 2 is advanced.
0 tip engages the actuating member 16 so that actuating member 1
6 rotates counterclockwise in FIG. 2 about the pivot shaft 16a. As a result, the engagement state between the actuating member 16 and the holding member 13 is released, and the holding member 13 is pushed down by the urging force of the compression coil spring 15 as shown in FIG. The grip portion 12b of the member 12 is engaged to hold the grip member 12 in the original string releasing position.

When the crank 53 rotates 360 degrees, the cutter slider 20
Is returned to its original position by the restoring force of a return spring (not shown), and as the clincher slider 34 retracts, the one-cycle off lever 58 rotates clockwise against the tension force of the tension coil spring 60, resulting in a gear switch. 59 turns off.

When the gear switch 59 is turned off, the relay switch 63 is turned off and the drive motor 50 is stopped, whereby the one-cycle operation ends.

Then, by releasing the operation handle 4, the bundling arm 3 returns to the closed position, the feed plate 25 advances, and the tip end of the bundling cord 6 after cutting is fed out to prepare for the next bundling.

Further, when it is desired to form a binding loop at both ends of the long binding cord 6, when the binding is performed at one end, the operation end 37a is operated to rotate the cut lever 37 in the clockwise direction. , The engaging projection 37b is displaced into the elongated hole 20b of the cutter slider 20. As a result, the cutter slider 20 and the cutter holder 36 become non-interlocked,
The cutter 36a does not operate. In this state, after the one end is bound without cutting the binding cord 6, the same operation as described above is performed on the other end side, that is, the cut lever 37 is rotated counterclockwise to engage the engagement protrusion 37b. Small hole 20a
The cutter slider 20 and the cutter holder 36 are displaced inward.
Is brought into an interlocking state, and is then bound, and thereafter, a part which is one between the overlapping portion of the binding string 6 and the front end of the string guide unit 24 is cut. As a result, binding loops can be formed at both ends of the long binding cord 6.

[Advantages of the Invention] As described above, in the cord grip releasing device in the binding machine of the present invention, the grip releasing device is provided in the binding arm and is always elastically biased in the cord gripping direction. A holding member that engages with the holding member to hold the holding member in the string releasing position, and a holding member that is provided at a position facing the holding member on the machine body side and engages with the holding member and the holding member. An actuating member that releases the engaged state and is actuated from the engaged position to the disengaged position by the drive mechanism,
The clinch is provided at a position corresponding to the front of the gripping member of the machine body in the gripping direction, and the driving mechanism moves the gripping member in the string releasing direction to release the binding string. Since it is possible to automatically perform the operation of gripping and releasing the string together with the operation, the operation is facilitated and the operation force is reduced, which is suitable for a long-time work such as fruit gardening work.

[Brief description of drawings]

The drawings show a binding machine according to an embodiment of the present invention. FIG. 1 is a side view showing the entire structure, FIG. 2 is a side view showing a grip release device section and a stapling mechanism section in a broken manner, FIG. 3 is a side view showing the binding arm side of the grip release device section,
FIG. 4 is a plan view showing the cutter actuating mechanism portion taken out, and FIG.
FIG. 6 is a plan view showing the clinch mechanism unit taken out, FIG. 6 is a side view showing the trigger mechanism unit broken away, FIG. 7 is a bottom view showing the one-cycle actuating mechanism unit taken out, and FIG. 8 is FIG. 9 is a side view showing the crank plate portion of FIG. 9, FIG. 9 is a configuration diagram of a drive circuit, FIG. 10 is a time chart showing the operation of the binding machine,
11 and 12 are cross-sectional views for explaining the operation of the grip release device. 1: Bundling machine, 2: Machine body 3: Bundling arm, 4: Operating handle 5: Drive mechanism, 6: Bundling string 7: Stapling mechanism, 12: Gripping member, 12b: Gripping portion 13: Holding member, 13a: Engagement Parts 14 and 15: compression coil spring, 16: operating member, 17: grip release member

Claims (1)

[Scope of utility model registration request] 1. A machine equipped with a stapling mechanism for clinching by winding a superposed part of a tying string which forms a loop by surrounding the object to be bound, and can be relatively contacted to and separated from the machine. A binding machine provided with a binding arm, an operation handle for operating the binding arm, a grip release device for gripping and releasing the binding string, and a drive mechanism for driving the stapling mechanism, The grip release device is provided on the binding arm and is always elastically biased in the string grip direction. The grip member is for gripping the string, and the grip member is engaged with the grip member to hold the grip member at the string release position. The holding member is provided at a position facing the holding member on the machine body side, engages with the holding member to release the engagement state between the holding member and the gripping member, and The operating member is operated from the engaged position to the non-engaged position by a mechanism, and is provided at a position corresponding to the front of the gripping member of the machine body in the gripping direction, and the driving mechanism moves the gripping member in the string releasing direction. A string grip release device for a binding machine, comprising a grip release member for moving the strap to release the strap.