JPH0636658Y2 - Shutter mechanism of straw binding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a shutter mechanism of an straw binding machine for binding straw after threshing, which is provided in a straw discharging route such as a combine harvester.

(B) Conventional Technology Conventionally, a technology in which a shutter is installed upright at the end position of a binding deck of a straw binding machine has been known.

For example, Japanese Utility Model Publication No. 61-25623 and Japanese Utility Model Publication No. 54-172841.
It is as in the official gazette.

In addition, the technology of providing a nodule door clutch by protruding from the bundling deck at the position corresponding to the nodule position in the central part of the straw,
Techniques such as JP-B-57-14024 and JP-B-61-25624 are known.

(C) Problems to be solved by the invention The shutter disclosed in Japanese Utility Model Publication No. 61-25623 is projected from the side of the discharge rod and rotates together with the discharge rod to the open side. The release rod is opened only at the same time as the release action, causing a large resistance to the release rod, and the root part of the straw is projected from the gap formed between the shutter hanging from above and the upper surface of the binding deck. There was a problem.

In addition, the shutter mechanism disclosed in Japanese Utility Model Laid-Open No. Sho 54-172841 pushes down the shutter that is spring-biased and standing up by the discharge force when the discharge rod releases the bundle of straw after binding, and the shutter is discharged. It was designed to eject the bundle backwards.

However, when the shutter is biased by the spring in this way, the spring force of the biasing spring becomes a problem.

When the spring force is increased, the opening angle of the shutter becomes smaller at the time of release, so it becomes a resistance against the operation of the release rod,
This leads to deterioration of the stock separation performance.

Further, if the spring force is weakened, the shutter cannot sufficiently hold the straw, and the scratching force of the packer releases the shutter to cause the straw to stick out.

The present invention solves the above problems.

(D) Means for Solving the Problems The object of the present invention is as described above, and the configuration for achieving the object will be described below.

On the binding deck 3 of the straw binding machine, at the position corresponding to the expected knotting position in the central portion of the straw, the nodule door clutch 22 constituting the clutch mechanism for the knotting work is arranged and engaged with the central portion of the straw. A shutter 1 that engages with the root portion of straw is arranged projecting from the binding deck 3 on the stock root side of the knot door clutch 22 and on the terminal end side of the binding deck 3, and from the shutter 1 and the needle 18. The projecting needle arm 7 is connected by an operation link 11, and is configured to open and close in conjunction with the clutch device of the binding device.

(E) Embodiment The purpose and construction of the present invention are as described above. Next, the construction of the embodiment shown in the accompanying drawings will be described.

FIG. 1 is a side view of a straw binding machine attached to the rear of the combine, FIG. 2 is a side view of a shutter drive mechanism provided in the binding mission case M, and FIG. 3 is a view of the needle arm 7 and the shutter 1. A side view of the portion and FIG. 4 are similarly rear views.

The overall configuration will be described with reference to FIGS. 1 and 2.

The cutter device C is arranged under the straw chain of the threshing device D mounted on the combine. The cutter device C and the straw bundling machine are used alternatively, and a switching device is arranged inside.

Then, a bundle gathering chain 20 for bringing the straw bundle after binding by the straw binding machine to the already trimmed side in the traveling direction and transporting it is arranged at the rear part of the straw binding machine.

The binding device is divided into upper and lower parts of the binding deck 3, and the binding mission case M extends vertically to transmit power to each part.

A packer, a needle 18, a needle arm 7, and a subpacker 13 are arranged below the bundling deck 3 in this order from the tip side, and a knot door clutch 22 is projected above the bundling deck 3 so that the needle 18 A knot building and a string holder are arranged in a knot frame 17 provided at a rotating position.
Also, the discharge rod that engages the bundle of straws after binding and discharges it backward
16 are arranged.

The shutter 1, which is the main part of the present invention, is arranged near the end of the binding deck 3 so as to project from the binding deck 3. Particularly, the stocker side of the binding deck 3 is engaged so that the root part of straw is engaged. It is provided in. In FIG. 1, reference numeral 23 denotes a stock source aligning plate, which is arranged at an end of the binding deck 3 on the stock source side.

In addition, at the rear part of the straw chain of the threshing device D, an intake belt 21 that smoothly guides straw onto the binding deck 3 is provided.
Is arranged so that the straw is transported to the knot pocket without stagnation.

The shutter 1 of the present invention is on the rear surface of the end of the binding deck 3,
As shown in FIG. 2, the binding deck 3 is arranged at the stocker side.

At the center of the straw and the expected knot position, the knot door clutch 22 holds the straw and prevents it from coming out.

However, there is nothing to hold the straw bundle at the end of the stocker side, and only the stocker is pushed by the subpacker 13 first and falls from the binding deck 3, and the binding state is disturbed and unsightly. is there.

In the present invention, the shutter 1 is provided in this portion, the spring force of the shutter 1 is increased, and the shutter is prevented from opening due to the straw pushed by the subpacker 13.

Further, if the biasing spring 4 is made too strong, useless resistance will be received at the time of discharging. Therefore, in the present invention, the discharging rod is
When the discharge is performed by 16, the shutter 1 is forcibly opened to exit the straw bundle without resistance.

Further, at the time of focusing, the shutter 1 is closed to ensure the separation of the stock origin between the previously discharged straw bundle and the next straw bundle.

Next, FIGS. 3 and 4 will be described.

In the shutter 1 of the present invention, the operation link 11 is connected to the needle arm 7.

When the subpacker 13 pushes the straws one after another into the knot pocket formed by the knot door clutch 22, the knot frame 17, and the bundling deck 3, the knot door clutch 22 is gradually rotated to bring the clutch into an engaged state, and the needle is closed. The arm 7 is rotated.

Then, the needle 18 rotates to the portion of the knot frame 17 to perform the knot action.

After the knot, the string 18 is held and the needle 18 returns again.

The turning force of the needle arm 7 is taken out by the operation link 11 and used for turning the shutter 1.

The needle arm 7 is pivotally supported by the pivot shaft 7a,
The arm 14 is pulled by the rotation of the needle drive shaft 14a of the binding mission case M, and the link 14 is pulled by the arm 14, whereby the needle arm 7 is reciprocally rotated.

An operation link 11 is pivotally supported near a pivot shaft 7a of the needle arm 7 via a pin 12, and the other end of the operation link 11 is pivotally connected to an arm 9 integrally formed with the shutter base 2. is there.

The shutter base portion 2 is pivotally supported on the rear surface of the binding deck 3 by a pivot shaft 6 of a pivot bracket 10, and the shutter base portion 2 rotates together with the rotation of an arm 9 to release the shutter 1. It is something to do.

A conventional urging spring 4 is interposed between the shutter base 2 and the shutter 1, and the shutter 1 is pivotally supported on the shutter base 2 by a pivot shaft 5.

Therefore, when a large amount of straw is pressed against the shutter 1, the shutter 1 rotates against the biasing spring 4 to open the shutter 1.

In normal movement, the shutter 1 is automatically released in conjunction with the movement of the needle arm 7 when the discharge rod 16 is bundled and rotated.

(F) Effect of the Invention Since the present invention is configured as described above, it has the following effects.

First, in the technique disclosed in Japanese Utility Model Publication No. 61-25623, which is a conventional technique, the shutter is provided so as to project from the side of the emission rod. Therefore, a gap is inevitably formed between the shutter and the bundling deck, so that there is a problem that the straw is projected from the portion.

Also, in the case of a shutter linked with the release rod, the opening operation is performed together with the release rod, and since it cannot be opened before the movement of the release rod, the movement of the release rod during release is heavy. There was a problem that it became.

In the present invention, since the shutter is configured to be interlocked with the needle, the shutter is opened before the discharging operation of the discharging rod, so that the movement of the discharging rod is not restricted.

Secondly, in another prior art, Japanese Utility Model Laid-Open No. 54-172841, a shutter which is not interlocked with the operation of the binding device is disclosed. In this case, the shutter is biased by a biasing spring. Since it is erected, it is necessary to discharge the binding straw against this biasing spring, which is a resistance to the discharging rod.

On the other hand, the shutter of the present invention interlocks with the movement of the needle arm to forcibly open so that it does not become a resistance of the release rod, and after release it surely returns to the standing state again, so the previous release It was possible to improve the stock separation performance between the bundle and the next release bundle.

[Brief description of drawings]

FIG. 1 is a side view of a straw binding machine attached to the rear of the combine, FIG. 2 is a side view of a shutter drive mechanism provided in the binding mission case M, and FIG. 3 is a view of the needle arm 7 and the shutter 1. A side view of the portion and FIG. 4 are similarly rear views. 1 ... Shutter 2 ... Shutter base 3 ... Bundling deck 4 ... Energizing spring 7 ... Needle arm 16 ... Discharge rod 18 ... Needle 22 ... Knotted door clutch

Claims (1)

[Scope of utility model registration request] 1. A knotting door clutch 22 constituting a clutching mechanism for knotting work is arranged at a position corresponding to a knotting planned position in the center part of the straw on the binding deck 3 of the straw discharging and binding machine. The shutter 1 that engages with the root portion of straw is disposed so as to project from the binding deck 3 on the stock root side of the knot door clutch 22 and on the terminal end side of the binding deck 3. 1. A shutter mechanism for a straw binding machine, characterized in that an operation link 11 connects between 1 and a needle arm 7 protruding from a needle 18, and is configured to open and close in conjunction with a clutch device of the binding apparatus.