JPH0324019Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention enables the one-turn clutch of the drive system for culm binding and discharge to move when the door to the bundled culm discharge port is swung by a pressing force greater than the setting of the bundled culm. The present invention relates to an agricultural tying machine provided with a spring which is interlocked with an operating member of the clutch to maintain the door in the closed position and maintain the clutch in the disengaged position of the operating member.

In the above-mentioned agricultural binding machine, immediately after the door returns to the closed position, the door may rebound slightly to the open side against the spring for maintaining the closed position due to the reaction of the closing force. There have been cases where the clutch that was supposed to be operated is re-engaged and operated, resulting in a so-called empty binding.

Therefore, conventionally, in order to prevent the above-mentioned empty bundling, a friction mechanism was provided to apply a predetermined resistance to the opening and closing swing of the door, and the structure was such that the frictional resistance prevented the door from bouncing back. Not only is the structure complicated because it is equipped with a friction mechanism, but the friction mechanism is subject to extremely high wear and tear due to the door being opened and closed many times, resulting in a lack of durability. However, there was a problem in that readjustment operations to maintain the frictional resistance at the set value were troublesome.

In view of the above-mentioned circumstances, the purpose of the present invention is to provide a rational and extremely simple improvement to the clutch operating member, to reliably prevent empty binding caused by door rebound, and to improve durability and maintainability. It is on the verge of improvement.

A characteristic configuration of the present invention is that in the agricultural binding machine described above, the operating member is provided with a plurality of locking portions for maintaining the operated member operated by the clutch in the clutch disengagement position in the rotational direction of the operated member. The functions and effects are as follows.

In other words, the operating member has a plurality of locking portions for maintaining the clutch disengaged position, which was conventionally one, and these locking portions are simply arranged in parallel in the rotational direction of the operated member operated by the locking portions. With an extremely simple improvement, even if the uppermost locking part in the rotational direction does not lock the operated member due to the door rebounding, the spring for maintaining the closed position can prevent the door from returning. Accordingly, one of the locking portions on the lower side in the rotation direction can be instantly locked to the operated member, and the clutch can be reliably disconnected and operated before empty binding is performed.

Moreover, since this is an improvement to the locking part in the original structure, it is possible to avoid early damage due to wear and readjustment operations that would occur when a friction mechanism is provided in the conventional structure, and the binding operation is reliable as a whole. In addition, it has become possible to provide a highly practical agricultural binding machine that is durable, easy to maintain, and extremely advantageous in terms of production and economy.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

FIG. 1 shows a device for bundling and discharging threshed waste straw supplied by a clamping conveyance chain 2 installed in a threshing device 1, in which the waste straw from the conveyance chain 2 is transferred through a transfer path A to a convergence section B. Various devices such as a rotary packer 3 for raking and conveying the tied string, a needle 4 for winding the tied string around the collecting and discharging straw, a knot building 5 and a string holder 6 for connecting the wound string, and an arm 7 for releasing the tied stem culm are provided. , doors 8 which are disposed above and below the converging part B and which can swing open and close relative to the discharge port C of the converging part B are also used as operation sensors for the clutch 9 that connects and disconnects the drive of the various devices; As the pressing force of the condensing stem culm against the door 8 exceeds the set value and the door 8 opens and swings, the clutch 9 is engaged and operated to remove the needle 4, knot building 5, holder 6, and the release. The arms 7 are configured to be activated at predetermined timings.

As shown in FIG. 2, the clutch 9 is configured to swing between an operating position where it interferes with the rotation locus of a protrusion 11 attached to a gear 10 that is constantly driven and rotated, and a non-operating position where it is retracted. A clutch operated member 12 whose position can be changed is attached to a clutch cam 13 which is freely rotatable around the same axis as the gear 10 and is biased toward the operating position by a spring 14, and a pawl type formed on the operated member 12. By providing a clutch operating member 15 that holds the operated member 12 in a non-operating position against the spring 14 by engaging the locked portion 12a, the operating member 15 is moved to the unlocked position. The clutch cam 13 is rotated integrally with the gear 10 by the locking action between the protrusion 11 and the operated member 12 during switching, and various devices such as the needle 4 connected to the cam 13 are driven. At the end of one rotation of the cam 13, the operating member 15 is engaged with the locked portion 12a to return and hold the operated member 12 in the non-operating position, thereby stopping the rotation of the cam 13 and locking the needle 4 and other parts. It is configured to cut off power transmission to the device.

In addition, 21 in the figure shows the cam 13 due to the elastic retraction action.
This is a stopper that prevents reverse rotation of the cam 13 by a contacting action against the cam 13 when the rotation of the cam 13 is stopped while allowing forward rotation of the cam 13.

A clutch bracket 17 rotatable around a support shaft 16 constitutes a linked operation structure between the door 8 and the clutch 9 as the clutch operation sensor.
The operating member 15 is swingable between a locking position and a non-locking position with respect to the locked portion 12a, and is locked by a spring 18 installed between it and the clutch bracket 17. A roller 17a is attached to the clutch bracket 17, which is pivotally connected to the clutch cam 13 in a biased state, and is always pressed into contact with the outer peripheral surface of the clutch cam 13 by the reaction force of a spring 18.

Then, a door arm 20 interlockingly connected to the door 8 via a support shaft 19 and an elongated hole 15a formed in the operating member 15 are locked and connected by a pin 20a. The door 8 is held in the closed position by the biasing force of the biasing spring 18 against the biasing spring 15, and as the door 8 swings open by the pressing force of the collecting and discharging straw against the closing biasing force, the pin 20a and Long hole 15a
The operation member 15 is locked by the locking action with the locked portion 12.
Clutch 9 is engaged and operated by switching to a non-operating position relative to a. Then, due to the rotation of the cam 13, the roller 17a is rotated by the cam 13.
As the clutch bracket 17 swings as it enters the recess 13a formed in the recess 13a, the reaction force of the clutch bracket 17 against the spring 18 is released, and the door that had been biased toward the closing side by the spring 18 is released. The door 8 is configured to be opened to release the collected and discharged straw, and to close the door 8 as the roller 17a rides on the outer periphery of the cam 13 in a reverse operation.

To configure the locking structure of the operating member 15 to the operated member 12, two claw-shaped locking portions 15b on the operating member 15 side that lock the claw-shaped locked portion 12a of the operated member 12 are used. , is provided on the operating member 15 so as to be juxtaposed close to each other in the rotating direction of the cam 13, and the door 8 rebounds to the opening side immediately after closing due to the closing reaction of the door 8 due to the biasing force of the spring 18. , the locking part 15 on the upper side in the rotation direction of the cam 13
Even if the locking portion 12a is not locked with the locking portion 12a, the locking portion 15b on the lower side in the rotational direction will lock the locking portion 12a with the subsequent return movement of the door 8.
The clutch 9 is immediately locked and held to ensure that the clutch 9 is disengaged, thereby reliably preventing so-called empty binding caused by the rebound operation of the door 8.

Note that the specific number of the locking portions 15b on the operating member 15 side and the arrangement pitch in the close state can be variously changed.

The present invention is directed to agricultural tying machines for various uses such as threshing straw and harvesting stalks and culms.

[Brief explanation of drawings]

The drawings show an embodiment of the agricultural binding machine according to the present invention, and FIG. 1 is an overall side view, and FIG. 2 is a partially cutaway enlarged view showing the drive structure. 8... Door, 9... Clutch, 12... Operated member, 15... Operating member, 15b... Locking part,
18... Spring, C... Release port.

Claims (1)

[Scope of utility model registration request] The door 8 for the bundled culm discharge port C is operated so that the one-turn clutch 9 of the drive system for culm binding and discharge is engaged and operated as the door swings with a pressing force greater than the setting of the bundled culm. operating member 15 of
This agricultural binding machine is provided with a spring 18 for maintaining the closed position of the door 8 and the clutch disengagement position of the operating member 15 in conjunction with the operating member 15. An agricultural binding machine in which a plurality of locking parts 15b for maintaining the operating member 12 in the clutch cut position are arranged close to each other in the rotational direction of the operated member 12.