JPH0522048Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a grain culm conveying device that transports threshed grain culms discharged from a threshing device of a combine harvester. This invention relates to improvements in switching devices.

[Prior Art] A grain culm conveying device that transports the grain culm that has been threshed by the threshing device of a combine to a straw processing device such as a straw cutter mounted on the rear of the combine machine is used to transport the grain culm to be discharged. In order to release the waste straw to a position beyond the waste straw processing device when it is not desired to process waste straw as culms, the position where the waste straw is released can be changed back and forth in the transport direction. I have made it possible for you to do so.

As shown in FIG. 1, the discharge position switching device in this grain culm transport device is normally arranged to face the transport stroke side of the endlessly rotating transport chain 1, forming the grain culm transport device a. The transport rail 2 is divided into a proximal end 20 formed in a sheath shape and a distal end 21 that is slidably inserted into the proximal end 20, and the distal end 21 of the distal end 21 is provided near the operator's seat of the combine harvester. A wire 3 whose traction operation is performed by a lever is connected so that the distal side 21 is pulled into the proximal side 20 by pulling the wire 3, and the distal side 21 is pulled into the proximal side 20.
The extrusion spring 4 that extrudes the wire 3 is housed and
When the traction is released, the tip side 2 is biased by the extrusion spring 4.
1 is pushed out, and as a result, the distal end side 21 is moved in and out of the proximal end side 20, and the release formed between the distal end of the distal end side 21 and the conveyance stroke side of the conveyance chain 1 is caused. The position of the outlet w is made to vary in the transport direction.

[Problems to be solved by the invention] By the way, this conventional means has a sheath-like proximal end 20 and a rod-like distal end 21 in order to smoothly move the distal end 21 in and out of the proximal end 20. Since the fit is formed loosely, when the distal end 21 is pulled out from the proximal end 20 as shown in FIG. Due to the looseness that occurs at the fitting portion between the side 20 and the tip side 21, the gap between the tip of the tip side 21 and the conveyance stroke side of the conveyance chain 1 is greatly expanded due to the pressure of the grain culms being held and conveyed. This causes a problem in that the force for holding the grain culm by the spring 51 that pushes up the support leg 50 connected to the base end side 20 is insufficient, resulting in a malfunction in the conveyance operation.

Furthermore, as a countermeasure to the problem of insufficient clamping force, if the proximal end 20 and the distal end 21 are tightly fitted together, the pushing action by the pushing spring 4 will only become less smooth. However, since deformation inevitably occurs on the distal end side 21 due to sliding contact with the conveyance stroke side of the conveyance chain 1, when it is inserted into the proximal end side 20, it is necessary to make sure that the deformed portion that occurs is even slightly jammed. The proximal side 20 of the distal side 21 becomes
Another problem arises that makes the movement in and out of the valve malfunction.

In addition, from this, in order to prevent the tip side 21 of the conveyor rail 2 in the pulled out state from increasing the amount of vertical movement due to backlash and causing malfunction in the conveyance operation of grain culms, it is necessary to A means of providing a supporting leg for supporting the distal end side 21 of the rail 2 on the machine body side in advance and connecting the supporting leg in a detachable manner when the distal end side 21 of the transport rail 2 is pulled out is proposed in practice. This was proposed by Publication No. 180541/1983. However, in this method, each time the leading end side 21 of the conveyor rail 2 is moved in and out to change the discharge position of the straw in order to change the work between when cutting the straw is desired and when it is not desired, the straw is transported. It is necessary to engage the distal end side 21 of the rail 2 with a supporting leg provided separately, and to disengage the engagement in order to release the link, which makes it troublesome to switch operations. .

[Purpose] The present invention was developed to solve these problems that have arisen with conventional means, and it is suitable for the work of cutting the waste straw, which is carried out by moving the leading end of the conveyor rail in and out. The straw discharge position can be easily changed by simply moving the tip of the conveyor rail in and out to switch to work that does not require cutting. To provide a new means for configuring a discharge position switching device in a grain culm conveying device so that the clamping force is sufficient and the forward end side of the conveying rail is smoothly moved in and out of the base end side. The purpose is to

[Means for Solving the Problems] In the present invention, as a means to achieve this object, the distal end side is fitted into the conveyance stroke side of the endlessly rotating conveyance chain so that the distal end side can move in and out from the proximal side. In a grain culm conveying device in which two conveyor rails are opposed to each other, a support leg that is connected to the distal end of the proximal end via a connecting pin and pushed out by a spring in the direction toward the conveying stroke side of the conveying chain is connected to its connecting pin and base. A play in the above direction is provided between the connecting hole provided in the distal end of the end, and the upper peripheral surface is connected to the distal end of the proximal end. A slider that slides into contact with the lower peripheral surface of the distal end side that is fitted inside the side is provided so as to be movable in the direction, and the slider is supported by a connecting pin provided at the upper end of the support leg. The present invention proposes a discharge position switching device in a grain culm conveying device.

[Example] Next, an example will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.

FIG. 3 is a schematic side view of a grain culm conveying device that can carry out the present invention when assembled to a combine harvester. A grain culm conveying device according to the present invention conveys culms, c is a waste straw processing device for cutting and processing the grain culms (waste straw) carried out by the grain culm conveying device a, and d is a seat of the combine harvester A.

As shown in FIG. 4, the grain culm conveying device a is
Conveyance chain 1 stretched so that it rotates endlessly
By arranging the conveyance rail 2 to face the conveyance stroke side 1a of the conveyance chain 1, and urging the supporting leg 50 connected to the conveyance rail 2 by the spring 51 so as to push it out toward the conveyance stroke side 1a, the conveyance stroke of the conveyance chain 1 is controlled. side 1a
The fact that the grain culms are held between the conveyor rail 2 and the conveyor rail 2 and is conveyed along the conveyor rail 2 is the same as that of conventionally known systems.

The conveyance rail 2 is divided into a proximal end 20 formed in a sheath shape and a rod-shaped distal end 21 that is slidably inserted into the proximal end 20 and can freely go in and out.

The force for pushing the conveyance rail 2 toward the conveyance stroke side 1a of the conveyance chain 1 is applied to the proximal side 2.
Support legs 50, 50 are connected to the base end and tip end of the combine harvester A, and the lower end sides of the support legs 50, 50 are slidable up and down on support stands 52, 52 fixed to the body of the combine harvester A. This is done by fitting and pushing up with the springs 51, 51, and by the spring pressure of the springs 51, 51, among the supporting legs 50, 50,
The supporting leg 50 connected to the distal end of the proximal end 20 has a fifth
As shown in the figure, when the U-shaped connector 53 provided at the upper end of the support leg 50 is connected to the distal end of the proximal end 20 by the connecting pin 54, the connecting pin 53
The connecting hole 55 provided at the distal end of the proximal end 20 is arranged vertically relative to the outer diameter of the connecting pin 54 so that the connecting pin 54 can be inserted thereinto.
!?This connecting pin 54 should be formed slightly larger.
Due to the play formed between the support leg 50 and the connecting hole 55, the support leg 50 and the distal end of the proximal end 20 are connected with a certain distance of play in the vertical direction. Further, the distal end portion of the proximal end 20 has its inner cavity expanded in the vertical direction, and a slider 56 is inserted therein so as to freely slide in the vertical direction.
is supported by the above-mentioned connecting pin 54 so that there is no play in the vertical direction, and the slider 56 is fitted into the distal end of the proximal end 20.
As a result, the supporting leg 50 pushed up by the spring 51 pushes up the slider 56 from the U-shaped connector 53 via the connecting pin 54. and its slider 56
By pushing up the rod-shaped distal end side 21, the upper circumferential surface of the distal end side 21 comes into pressure contact with the inner circumferential surface of the proximal end side 20 and pushes it up.
and the proximal end 20 are in close contact with each other without play, and are pushed up by the spring 51.

In addition, the distal end 2 fitted into the proximal end 20 of the sheath-like
1 is connected to its distal end with the distal end of a retraction actuation wire 4a pulled out from inside a machine casing 60 provided near the seat d of the combine harvester A, and connected to its base end. The ends of wires 4b for extrusion operation are connected, and these wires 4a, 4b are movable and actuated by the operation of an operating lever 62 which is rotatably supported on the machine casing 60 to rotate about a support shaft 61. By operating the reel 63, the reel 63 is retracted and retracted, thereby moving in and out of the proximal end side 20 of the sheath.

Furthermore, the aforementioned slider 56 also serves as a guide member for the wires 4a, 4b that move in and out of the distal end side 21, and is formed into a guide ring that freely rotates around the connecting pin 54.

In the illustrated embodiment, reference numeral 64 supports a movable reel 63 and rotates about the support shaft 61 together with the operating lever 62, and 65 is an operating arm that guides the extrusion operation wire 4b midway. Machine case 6
66 is a return spring for the wire 4b for extrusion operation, and 67 is a return spring for the wire 4a for retraction operation.

[Function] The embodiment device configured as described above functions as follows.

The supporting leg 50 is connected to the distal end of the base end 20 of the conveyance rail 2 and pushed up by the spring 51, and the support leg 50 is connected to the distal end of the base end 20 of the transport rail 2 and pushed up by the spring 51. During the play formed in the mating portion, only the slider 56 that tightly fits the connecting pin 54 is pushed up without acting on the proximal end 20.

As a result, the upper peripheral surface of the slider 56 presses against the lower peripheral surface of the distal end 21 fitted into the proximal end 20 and pushes up the distal end 21. The play formed between the upper circumferential surface and the inner circumferential surface of the proximal end side 20 is crushed, and the upper circumferential surface of the distal end side 21 is in close contact with the inner circumferential surface of the proximal end side 20 as shown in FIG. shall be. In this state, the proximal end 20 is pushed up together with the distal end 21 by the bias of the spring 51.

Therefore, even if the fitting portion of the distal end side 21 with the inner circumferential surface of the proximal end side 20 is formed in a loosely fitted state to facilitate the movement of insertion and removal, as shown in FIG. In addition, the inner circumferential surface of the proximal end 20 is held in close contact with the inner circumferential surface of the proximal end 20 without play, and a sufficient clamping force is maintained.

[Effects of the invention] As explained above, the discharge position switching device in the grain culm conveying device according to the present invention has a distal side 21 on the conveying stroke side 1a of the endlessly rotating conveying chain 1 with respect to the proximal side 20. In the grain culm conveyance device in which the conveyance rails 2 facing each other are fitted in such a way that they can be freely moved in and out,
A supporting leg 50 is connected to the distal end of the base end 20 of the conveyance rail 2 via a connecting pin 54 and is pushed out by a spring 51 in the direction toward the conveying stroke side 1a of the conveying chain 1. A play in the above direction is provided between the connecting hole 55 provided at the distal end of the proximal end 20 of the transport rail 2, and the transport rail 2 is connected to the distal end of the proximal end 20 of the transport rail 2. A slider 56 whose upper circumferential surface slides in sliding contact with the lower circumferential surface of the distal end 21 fitted into the proximal end 20 of the transport rail 2 is inserted into the inner cavity of the distal end of the proximal end 20 of the transport rail 2 in the above direction. Since it is configured to be movable and the slider 56 is supported by the connecting pin 54 provided at the upper end of the support leg 50, it is possible to perform the work in which cutting of the waste straw to be discharged is desired and the work in which it is not desired. For switching, the straw discharge position can be changed by a simple operation of moving the distal end side 21 of the conveyor rail 2 in and out of the proximal end side 20, and the movement in and out is smooth. The distal end 21 of the transport rail 2 and the proximal end 20 are tightly fitted together so that the distal end 21 and the proximal end 20 of the transport rail 2 are
When the grain culm is pulled out, the clamping force of the grain culm between the tip side 21 of the grain culm and the conveying chain 1 can be made sufficient.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the main part of the conventional means, Fig. 2 is a longitudinal sectional front view of the same, and Fig. 3 is a general explanation of the grain culm conveying device in which the present invention can be implemented in a state assembled in a combine harvester. 4 is a partially cutaway side view of the main part of the grain culm conveying device, and FIG. 5 is a longitudinal sectional front view of the main part. Explanation of drawing symbols, A... Combine harvester, a... Grain culm conveyance device, b... Threshing device, c... Straw removal processing device, d... Seat, 1... Conveyance chain, 1a... Conveyance process side, 2...Transportation rail, 20...Proximal end side,
21... Tip side, 3... Wire, 4... Extrusion spring, 4a... Wire for retraction operation, 4b... Wire for extrusion operation, 50... Support leg, 51... Spring, 52... Abutment , 53... Connector, 54... Connecting pin, 55... Connecting hole, 56... Slider, 60
... Machine casing, 61 ... Support shaft, 62 ... Operation lever,
63...movable reel, 64...operating arm, 6
5... Reel, 66, 67... Return spring, w...
Ejection port.

Claims (1)

[Scope of utility model registration request] In a grain culm conveyance device in which a conveyance rail 2 is opposed to the conveyance stroke side 1a of a conveyance chain 1 that rotates endlessly, and a distal end side 21 is fitted in and out of the base end side 20, the base of the conveyance rail 2 is The spring 5 is connected to the tip of the end side 20 via a connecting pin 54.
1, the support leg 50 is pushed out in the direction toward the conveyance stroke side 1a of the conveyance chain 1 by its connecting pin 54.
and the connecting hole 55 provided at the distal end of the proximal end 20 of the transport rail 2, with a play in the above direction to connect to the distal end of the proximal end 20 of the transport rail 2, and to connect the transport rail 2 to the distal end of the proximal end 20 of the transport rail 2. The upper circumferential surface of the transport rail 2 is connected to the inner cavity of the distal end of the proximal end 20 of the transport rail 2.
A slider 56 that slides into contact with the lower circumferential surface of the distal end 21 that is fitted into the support leg 50 is provided so as to be movable in the above direction, and the slider 56 is supported by a connecting pin 54 provided at the upper end of the support leg 50. A discharge position switching device in a grain culm conveying device, characterized in that: