JPH073872Y2 - String threading device for binding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to an improvement of a string threading device that is forcibly paid out by a flexible rod feeding part that locks a binding string and is inserted into a string hole at the tip of a needle. It is a thing.

(B) Conventional technology A string threading device configured to thread an elastic rod holding a binding string into a string feeding path with an elastic rod feeding part and thread the string into a string hole of a needle of a binding machine. It is known (see, for example, JP-A-61-104913).

(C) Problems to be solved by the invention In the conventional device, in addition to the power operation for moving the elastic rod back and forth when moving the elastic rod forward or backward in the stringing direction, Since the operation to switch the moving direction of the elastic rod was required, there was a problem that the operation was troublesome and it was easy to make a mistake in the operation.If there was an operation mistake, the elastic rod and the binding cord locked to it would be fed out normally. There was a problem that there was no such thing, or the tying string that had been threaded through was pulled out.

Then, this invention is implemented for the purpose of obtaining the stringing device of the binding machine which eliminates the said problem.

(D) Means for Solving the Problem That is, the string threading device according to the present invention is a recoil shaft that is normally rotated by a recoil rope (12a) wound around a drum (13) and is reversely operated by a recoil spring (14). A flexible rod feeding wheel body (16) is fitted in (15), and the flexible rod (18) for stringing is connected between the flexible rod feeding wheel body (16) and a guide roller (17) provided opposite thereto. ), A flexible rod feeding portion (K) configured to move back and forth, a winding string holding case (9).
The drum, which is installed in the string feeding path between the needle and the needle (5), and moves the binding string (M) up to the needle (5) by the advancing movement of the stringing flexible rod (18). The operating plate (36) arranged on the lateral side of (13) is pivotally supported by a fulcrum shaft (37) parallel to the recoil shaft (15), and a predetermined range is accompanied by rotation of the shaft (15). Is provided so as to swing and move, and an engaging claw body (40) which can be engaged with and disengaged from a reverse rotation preventing tooth (41) engraved on the outer periphery of the drum (13) at a predetermined portion of the operating plate (36). ) Is pivotally attached to the revolving spring (43) in a direction to separate it from the reverse rotation preventing tooth (41), and when the actuating plate (36) swings, the revolving spring (43) is compressed. This is configured as a string threading device in a binding machine in which the compounding claw (40) is engaged with the reverse rotation preventing tooth (41).

(E) Action In the device of the present invention, the flexible rod (18) can be drawn out and properly threaded only by operating the recoil device (11) without any other operation. Flexible rods (18)
Can be temporarily maintained in the extended state,
There is no trouble of operation and no operation mistakes are caused, and there is no problem that the elastic rod and the binding cord locked to the elastic rod are unjustly fed out, or the binding cord that has been threaded through is pulled out. Therefore, it is always possible to carry out good stringing.

(F) Embodiments Embodiments will be described below with reference to the drawings. First, the overall structure of a binder to which the present invention is applied will be described with reference to FIGS. 10 and 11.

The cutting and binding portion of the binder has a raising device (A) arranged at the front end, and a conveyance guide plate (B) is provided upright behind the cutting blade portion provided below the rear part of the raising device (A). It is configured to convey the grain culms cut by the cutting blade portion to one lateral side of the machine body.

Then, a binding machine is continuously provided at the end of the transportation path for laterally transporting the grain culms, and a knot consisting of a knot cover (1), a knot building (2), a string holder (3) and the like is provided on the front side of the binding path. And a bundle discharging arm (4), and a needle (5), a door / clutch actuating body (6), a packer (7), etc. are arranged at the rear side of the binding passage.

The harvesting binding part is mounted on the front surface of the traveling vehicle body, and the traveling vehicle body has a cord holding case (9) arranged above the traveling mission between the on-board engine (E) and the carrier plate (B). The binding string (M) is drawn out from the winding string (C) to be stored and supplied toward the string hole at the tip of the needle (5), and the flexible rod according to the present invention is provided in the middle of the string drawing path. A feeding section (K) is installed.

Next, the structure of the flexible rod feeding section (K) will be described. The case (10) is fixedly mounted on the handle section (8) of the traveling vehicle body, and the recoil device (11) is installed in the case (10). .

The recoil device (11) is configured by equipping a longitudinal recoil shaft (15) with a drum (13) around which a recoil rope (12a) is wound, and a recoil spring (14).

Then, when the recoil grip (12) continuously provided at the end of the recoil rope (12a) is pulled in a direction intersecting the handle (8), the drum (13) and the recoil shaft (15) rotate in the normal direction ( When the pulling force applied to the recoil grip (12) is released, the drum (13) and the recoil shaft (1) rotate by the rewinding force of the recoil spring (14).
5) is wound in the opposite direction (the direction opposite to the arrow a).

A flexible rod feeding wheel body (16) is fitted and fixed on the recoil shaft (15), and a guide roller (17) is provided opposite to the outer periphery of the flexible rod feeding wheel body (16). Being Both (16)
The flexible rod (18) for feeding the binding string is inserted between (17), and the screw projection formed on the outer circumference of the flexible rod is engaged with the tooth portion of the flexible rod feeding wheel body (16). The same wheel body (16) is configured to forcibly feed by the operation in the normal direction.

The flexible rod (18) is provided with a string locking projection (19) for hooking and holding the binding string (M) at its tip, and is provided with a storage pipe (when the string is not threaded) under normal conditions. 20) It is retracted and stored inside.

The storage pipe (20) includes a front storage pipe (20a) and a rear storage pipe (20b) arranged in front of and behind the portion where the flexible rod feeding wheel body (16) and the guide roller (17) face each other. ) And a front part of the storage pipe (20a) is provided with a string set groove (20c) for locking the binding string (M) with the string locking projection (19) of the flexible rod (18). It has been. When the binding string (M) is locked in the string setting groove (20c), the string locking protrusion (19) is retracted to the rear side of the setting groove (20c) of the front storage pipe (20a) so as to be stored. ing. (See Figures 1 and 2).

A string guide plate (21) is arranged in the front part of the case (10), the binding string (M) is inserted into the guide hole (21a), and the binding string (M) passing through the guide hole (21a) is Further, it extends through the guide pipe (22) toward the string hole at the tip of the needle (5), and a string brake device (23) and a slack eliminating rod (24) are installed in the string feeding path, The bundling string (M) is fed out through these as well.

The string brake device (23) is installed in a string feeding path between the guide hole (21a) and the rear end surface of the guide pipe (22) at a position adjacent to the exit side, and is elastically pressed toward the brake roller (23a). Changing the pressure of the braking spring (26) by the braking force adjusting handle (25) so that the braking force can be applied to the binding string (M) passing between the braking plate (23b) and the braking plate (23b). The braking force can be adjusted.

Further, the slack eliminating rod (24) is formed of a spring material, and the spring end of the winding spring at the base is locked by being attached to the support plate (28) fixed to the brake roller shaft (27), and the winding spring is attached. Ring part (24a) for inserting the other end extending from the part
The ring portion (24a), through which the binding cord (M) is inserted, is laterally displaced from the guide pipe (22), so that the binding cord (M) is loosened. There is.

In addition, when the above-mentioned cord brake device (23) is in a braking state when the flexible rod (18) is fed out by the flexible rod feeding portion (K), the flexible rod (18) moves the cord brake device portion. If the slack eliminating rod (24) is located laterally away from the guide pipe (22), the binding string (M) cannot be inserted into the ring portion (24a). , When the string is threaded by the flexible rod (18), the braking state of the string brake device (23) is released, and the slack eliminating rod (2)
A mechanism for moving the ring 4) to a position where its ring portion (24a) is concentrically aligned with the guide pipe (22) is provided with the following structure.

The support plate (28) is fixed to the brake roller shaft (27),
A brake release roller (29) is provided on the support plate (28), and an operating arm (30) is provided on the opposite side of the brake roller shaft (27) from the tip of the operating arm (30) downward. A pin (3 parallel to the brake roller axis (27)
1) is projected, and this pin (31) is interlocking arm (32).
Is engaged by the long hole engagement.

The interlocking arm (32) is formed by a plate-shaped member that is long in the front-rear direction, and has a rear end base pivotally attached to a pivot shaft (34) parallel to the recoil shaft (15), and the pin (31) is provided. A long hole (33) that is long in the front-rear direction and engages with the plate-shaped body is formed in a middle portion of the plate body in the front-rear direction.

The front part of the interlocking arm (32) is, as shown in FIG. 2, the recoil spring of the guide ring (35) integrally mounted on the outside of the drum (13) of the recoil device (11). A spring that is in contact with the outer end surface on the (14) side and is vertically movable with respect to the guide wheel body (35) is maintained by a spring interposed in the pivot shaft (34).

When the recoil shaft (15) is normally rotated, the interlocking arm (32) is guided to the guide portion (35a) formed in the guide wheel body (35) as shown in FIG. However, in the initial stage of rotation of the recoil shaft (15), the interlocking arm (32)
2 from the position shown in FIG. 2 to the spiral groove of the guide portion (35a) carved on the outer periphery by a locking step portion (not shown) provided on the outer end surface of the guide ring (35). And is moved toward the winding side of the recoil cord (12a) of the drum (13) and is moved to the outer circumference of the bottom of the spiral groove.

That is, the interlocking arm (32) is centered around the pivot shaft (34).
Is configured so as to bend and move in the axial direction of the recoil shaft (15) while moving upward (see FIGS. 2 and 4).

Then, when the interlocking arm (32) is swung as described above at the initial stage of rotation of the recoil shaft (15), the interlocking arm (32) is moved.
Of the brake shaft (2
7) is rotated so that the brake release roller (29) moves to the brake plate (23b).
Is released and the braking state of the brake device is released, and the ring portion (24a) of the slack eliminating rod (24) is moved to a position concentric with the guide pipe (22), and the recoil shaft (15). The flexible rod (18) fed out by the flexible rod feeding wheel body (16) by the normal rotation operation of (1) passes through the brake device (23) in the braking release state and passes through the ring portion (24a) of the slack eliminating rod (24). It passes and extends to a position where it passes through the cord hole at the tip of the needle.

By the way, after the flexible rod (18) has been extended to a position where it passes through the string hole at the tip of the needle, the binding string (M) held by the string locking protrusion of the flexible rod (18) is held. It is pulled out and set manually at the knotting part of the binding machine. At this time, if the recoil shaft (15) is recoiled, it will reach the folding needle (5).
Is pulled back by the retraction of the flexible rod (18), a reverse rotation prevention mechanism (S) having the following structure is installed in the flexible rod feeding part (K) in order to prevent such a situation. There is.

An actuation plate (36) located on the lateral side of the drum (13) is rotatably supported by a fulcrum shaft (37) installed in the case (10), and the fulcrum shaft (37) is attached to the actuation plate (36). ) Centered on the circular arc long hole (38) with a recoil shaft (15) with a proper play gap, and the working plate (36) has a brake roller shaft (27) on the free end side. And a position regulating surface (36a) and a swing position regulating surface (36b) are provided at the extending tip end.

The operating plate (36) is locked with one spring end of a torque spring (39) externally inserted outside the recoil shaft (15), and the other spring end of the torque spring (39) is Is in sliding contact with the lateral side surface of the drum (13).

The actuating plate (36) normally has a position regulating surface (36) provided on the free end side (when the string is not threaded).
a) contacts the brake roller shaft (27) side and is maintained in the standby posture (see FIGS. 1 and 5), and the drum (13) is normally rotated in the a direction shown in FIG. 5 in that posture. When,
It swings upward in the figure, and the swing restriction surface (36b) is
0) to the position where it abuts the inner wall (see FIGS. 6 and 7).

The drum (13) continues to rotate even after the operating plate (36) has moved to a position where it comes into contact with the inner wall of the case (10), but at this time, a torque spring that slides against the lateral surface of the drum (13). Since the other spring end of (39) is slippery and corresponds, the drum (13) rotates without hindrance.

An engaging claw body (40) is axially attached to a predetermined position of the operating plate (36), and the tip end of the engaging claw body (40) is engraved on the outer peripheral edge of the drum (13). It is adapted to be disengaged from the blocking tooth (41), and the engaging claw body (40) engages both spring ends thereof with the locking pin (42) provided on the case (10). The coil spring (43) that is stopped and inserted and that acts in the opening direction is configured to be maintained in the retracted position that is not normally engaged with the reverse rotation preventing tooth (41).

In a binding machine to which the stringing device according to the present invention is applied,
When carrying out string threading work, set the binding string (M) pulled out from the winding string (C) in the string setting groove (20c) of the storage pipe (20) as shown in FIGS. 1 and 2. Then, the recoil grip (12) of the recoil device (11) is pulled.

When the recoil handle (12) is pulled, the recoil shaft (15) is rotated in the forward direction by the recoil rope (12a) and the drum (13), and the flexible rod feeding wheel fitted to the recoil shaft (15). Since the (16) rotates, the flexible rod (18) is extended by the ring body (16) and the guide roller (17), and the binding cord (M) set in the cord setting groove (20c) is corded. Locking protrusion (1
9) is hooked and held, and is fed out from the storage pipe (20).

The flexible rod (18) that is fed out must pass through the ring portions of the string brake device (23) and the slack eliminating rod (24), but the string locking projection (19) at the tip of the flexible rod is the string. By the time it reaches the brake device (23), etc., the working arm (30) is moved by the interlocking arm (32) engaged with the guide part (35a) of the guide wheel (35) rotating with the drum (13). Is oscillated to operate the support plate (28), and the braking release roller (29) installed on the support plate (28) is moved to separate the braking plate (23b) from the brake roller (23a), and at the same time, the slack eliminating rod (24). Since the ring part (24a) is moved to a position where the ring part (24a) matches the guide pipe (22), the flexible rod (18) is released from the braking state by separating the brake plate (23b) from the brake roller (23a). The ring part of the slack eliminating rod (24) that passes through the broken brake device (23) without difficulty. 24a) through the fed to the guide pipe (22), the tip of the cord stop projection (19) is advanced to a position passing through the cord holes of the needle (5).

In this state, even if the pulling operation of the recoil grip (12) of the recoil device (11) is stopped and the operator releases his / her hand from the recoil grip (12), the reverse rotation prevention mechanism (S) is blocked and actuated. Since the operation of the drum (13) in the reverse direction is blocked, the flexible rod (18) that has passed through the cord hole at the tip of the needle is not pulled back immediately but is maintained in the needle passing state. The operation of the blocking mechanism (S) is shown in order from FIG. 5 to FIG.

That is, in the normal time when the recoil device (11) is not operated, the operating plate (36) contacts the position regulating surface (36a) provided on the free end side of the operating plate (36) with the brake roller shaft (27) side. Therefore, the engaging claw body (40) is kept in the standby position shown in FIG. 5, and the engagement claw body (40) is kept at the position separated from the reverse rotation preventing tooth (41) by the spiral spring (43) acting in the opening direction ( Fifth
See figure).

Therefore, the operation of the recoil device (11) is performed without any trouble.

When the recoil device (11) is normally rotated for threading the string, the drum (13) rotates in the direction a. Therefore, the operating plate (36) is rotated by the torque spring (39) slidingly contacting the lateral side of the drum. 6) swings around the fulcrum shaft (37) as shown in FIG. 6, and moves to a position where the swing position restricting surface (36b) contacts the inner wall of the case (10).

At the time of this transition, as shown in FIG. 7, the engaging claw body (40) is engaged with the tooth portion of the reverse rotation preventing tooth (41) by the coil spring (43).

Then, the normal operation of the recoil device (11) is performed by the flexible rod (1
8) is continued until it passes through the string hole at the tip of the needle (5), but the engagement between the engaging claw (40) and the reverse rotation preventing tooth (41) functions only in the reverse direction. Therefore, the normal operation of the recoil device (11) continues without any trouble.

Then, as shown in FIG. 8, the flexible rod (18) has the needle (5).
If the pulling operation of the recoil device (11) is stopped after passing through the string hole at the tip, the reverse rotation preventing tooth (40) will exert a reverse rotation preventing effect, and the operator will move the hand from the recoil handle (12). Even if it is released, the flexible rod (18) is maintained in the state of passing through the cord hole of the needle (5).

Therefore, the worker can start the work of the next process without worrying about the unexpected retraction of the flexible rod (18).

That is, the string locking projection (19) at the tip of the flexible rod (13) maintained in the needle passing state by the reverse rotation prevention mechanism (S).
Remove the bundling cord (M) from it and hook it on the cord locking piece (44) fixed to the right end of the knot cover (1) to position it.
The end of the string is hooked on the string locking piece (45) installed on the driving crank arm of the bundle discharging arm (4) in the stored state.

Then, when the door / clutch actuating body (6) is pulled and the binding clutch is inserted and the binding machine is idled, the binding string (M) is moved by the operation of the needle (5) to form the knot building (2) and the string holder (3).
The piece of the binding string cut by the string cutting blade is pulled up by the operation of the bundle discharging arm (4), so it is pulled out from the string locking piece (45) and the string passing set. The work is completed.

After this work is completed, the recoil handle (12)
When the pulling operation is slightly performed, the reverse rotation preventing tooth (41) engraved on the outer peripheral edge of the drum (13) rotated in the forward direction is positioned in the rotational direction with respect to the tip of the engaging claw body (40). As a result, the engaging claw body (40) has a relative positional relationship such that it can be disengaged from the tooth portion of the reverse rotation preventing tooth (41), and the engaging claw body (40) acts in the opening direction as shown in FIG. Spring (43)
It is moved back to the retracted position by the spring force of the drum (13).
Is in a free rotation state, is reversely operated by the rewinding force of the recoil spring (14), the reverse rotation preventing mechanism (S) returns to the normal state shown in FIG. 5, and the entire flexible rod feeding section (K) is also in a normal state. It returns to the state of FIG.

When the recoil device (11) is rotated in the forward direction by pulling the recoil handle (12) to feed the flexible rod (18), the engaging claw body (40) contacts the reverse rotation preventing tooth (41). Moving along the drum (13) while getting over the teeth,
As soon as the pulling force of the recoil grip (12) disappears, it will immediately engage with the tooth of that part, so that the flexible rod will not reach the string hole of the needle yet it will return to the recoil grip position in a halfway state. Flexible rod (18)
Is held in the midway feeding position.

Therefore, if the recoil device (11) is extended from the midway extended position and actuated, the flexible rod (18) continues to be extended from the midway extended position, so that the flexible rod (18) once returns to the original position and is then extended again. The entanglement of the string (M) does not occur, and the string can be threaded smoothly toward the needle.

(G) Effect of the device In the device of the present invention, a flexible rod feeding portion (K), which is operated to rotate forward and backward by the operation of the recoil device (11), is provided between the winding string holding case (9) and the needle (5). It is installed in the string feeding route of
A recoil device (a recoil device) in a string threading device for drawing out the stringing flexible bar (18) by the forward rotation of the flexible bar feeding part (K) and inserting the binding string (M) into the string hole of the needle (5). 11)
A reverse rotation preventing mechanism (S) is installed therein, which automatically changes the posture to prevent the reverse rotation of the recoil device (11) when the operation of rotating the recoil device (11) forward is stopped. Since the flexible rod (18) can be temporarily held in the extended state toward the needle (5) by the blocking operation of the mechanism (S), only by operating the recoil device (11), The flexible rod (18) can be extended and properly threaded without any other operation, and the flexible rod (18) can be temporarily maintained in the extended state. There is no hassle and no mistakes are made,
An advantage that the elastic rod and the binding cord (M) locked to the elastic rod can always be satisfactorily threaded without causing problems such as illicit feeding of the elastic rod and the binding string (M) that has been threaded There is.

[Brief description of drawings]

FIG. 1 is a plan view of the device of the present invention in a string set state,
2 is a partially cutaway side view thereof, FIG. 3 is a plan view of the device of the present invention in a state where the stringing is completed, FIG. 4 is a partially broken side view thereof, and FIGS. 5, 6, and 7 are shown. 8 and 9 are explanatory views showing the operation sequence of the device of the present invention, FIG. 10 is an overall plan view of the binder to which the device of the present invention is applied, and FIG. 11 is an enlarged plan view of the binding machine part. is there. (5) …… Needle, (9) …… Winding cord case, (11)…
… Recoil device, (18) …… Flexible rod, (K) …… Flexible rod feeding part, (M) …… Bundling cord, (S) …… Reverse rotation prevention mechanism

Claims (1)

[Scope of utility model registration request] 1. A recoil cord (12) wound around a drum (13).
a) The recoil shaft (15) that is normally rotated by the a) and is reversely operated by the recoil spring (14) is attached to the flexible rod feeding wheel body (16).
And a flexible rod feeding structure configured to move the stringable flexible rod (18) forward and backward by the flexible rod feeding wheel body (16) and a guide roller (17) provided opposite thereto. The part (K) is installed in the string feeding path between the winding string holding case (9) and the needle (5), and the binding string (M) is moved by the advancing movement of the flexible rod (18) for string threading. ), The operating plate (36) arranged on the lateral side of the drum (13) is pivotally supported on a fulcrum shaft (37) parallel to the recoil shaft (15). And a reverse rotation preventing tooth (41) engraved on the outer periphery of the drum (13) at a predetermined portion of the operating plate (36). ), The engaging claw body (40) that can be engaged and disengaged is axially attached, and the coil spring (43) elastically urges in the direction to separate from the reverse rotation prevention tooth (41), and the operating plate (36) swings. The coil spring (43) is passed through the cord in the binding machine that when compressed Kakarigotsumetai (40) is adapted to engage the reverse blocking teeth (41) device.