JPH0568204B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a combine harvester to convey the harvested grain culm backwards while controlling the handling depth (the granulation part of the reaped grain culm is located at the optimal position of the threshing device). The position of the tip of the harvested grain culm is detected by a sensor, and then the stock side of the harvested grain culm is
This invention relates to a grain conveying device for a threshing device that delivers grain to a feed chain provided on one side of the machine body.

[Conventional technology]

Some grain culm conveying devices for combine harvesters as described above have the following configuration.

In other words, the stalk side of the harvested grain culm is held and transported backwards in a nearly standing position, the grain side is switched from the roughly standing position to a sideways position, and the grain is transferred to the feed chain provided on one side of the machine. A method that includes a conveying device that transfers the stock side of the harvested grain culm that has been switched to a sideways posture, and detects the tip position of the harvested grain culm on the outside of the tip side location at the starting end of the sideways conveyance path of the conveying device. It has a configuration equipped with a sensor for depth control.
122526, Utility Model Application Publication No. 54-22038).

In some cases, a guide member for guiding the harvested grain culm from the outside is disposed between the sensor and the conveyance device to stabilize the transportation of the harvested grain culm.

[Problem that the invention seeks to solve]

In the above-mentioned conveying device, when the harvested grain culm that is transported rearward in a substantially standing position is switched to a sideways posture, the tip side of the harvested grain culm is swung around when the posture is switched, and Centrifugal force forces the harvested grain culm to the outside (towards the feed chain).

Therefore, if a sensor for controlling the handling depth is placed outside of the point on the ear side as described above at the starting end of the sideways conveyance path where the harvested grain culm is switched to the sideways posture, centrifugal force will cause the harvested grain culm to The tip side is pressed against the sensor, and the sensor accurately detects the position of the tip of the harvested grain culm.

However, if a guide member is similarly arranged from the outside at the starting end of the sideways conveyance path, the tip side of the harvested grain culm will be pressed against the guide member by centrifugal force.
The tip side of the harvested grain culm was squeezed by this guide member, and there were cases where grain shedding occurred.

An object of the present invention is to suppress the shedding phenomenon caused by the guide member near the starting end of the sideways conveyance path, while retaining the advantage that the tip position is accurately detected by the sensor for controlling the handling depth. It is said that

[Means for solving problems]

The feature of the present invention is that the grain culm conveying device for the combine harvester as described above is configured as follows.

The harvested grain culm is conveyed in a nearly standing position by holding the stock side, and then switched from the almost standing position to a horizontally falling position with the ear end side, and then transferred to the feed chain provided on one side of the machine body in a horizontally falling position. a conveyance device for delivering the stock side of the reaped grain culm that has been switched to the above, and a sensor for detecting the position of the ear tip of the reaped grain culm on the outside of the ear tip side location at the starting end of the sideways conveyance path of the conveyance device; A guide member for guiding the harvested grain culm from the outside is provided between the sensor and the conveyance device, and a portion of the guide member corresponding to the sideways conveyance path is deviated in a direction substantially along the conveyance direction of the feed chain. be.

[Effect]

For example, as shown in FIG. 1, the reaped grain culm, which is transported rearward by the transport device 5 in a substantially standing position, is switched to a sideways position and bent outward (towards the feed chain 8) due to centrifugal force. Suppose you are in a situation like this.

In this case, if the portion 12a of the guide member 12 corresponding to the sideways conveyance path is deviated in a direction substantially along the conveyance direction of the feed chain 8 as in the present invention, the tip of the reaped grain culm that has curled outward A phenomenon in which the side is strongly pressed against the guide member 12 and squeezed does not occur.

For example, as shown in FIG. 1, sensors 10 and 11 for controlling the handling depth are placed outside the ear tip side at the starting end of the sideways conveyance path where the reaped grain culm is switched to the sideways position. Therefore, the tip side of the harvested grain culm is pressed against the sensors 10, 11 by the centrifugal force, and the sensors 10, 11 can accurately detect the position of the ear tip of the harvested grain culm.

〔Effect of the invention〕

As described above, when the harvested grain culm is switched from a nearly standing posture to a sideways posture, the phenomenon in which the tip side of the harvested grain culm is strongly pressed against the guide member and squeezed can be eliminated, and the phenomenon caused by straining can be eliminated. It was possible to prevent grain shedding and improve grain collection efficiency.

It also has the advantage that the tip side of the harvested grain culm is pressed against the sensor, allowing the sensor to accurately detect the position of the tip of the harvested grain culm.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 5, a threshing device 2 is mounted on a machine body equipped with a crawler traveling device 1, and a clipper-type reaping device 3, a pulling device 4, and a conveying device 5 are mounted on the front of the machine body.
The combine is equipped with a pre-reaping processing section consisting of the following:

As shown in FIGS. 1, 2, and 5, the conveying device 5 includes a clamping and conveying device 6 that clamps and guides the base of the harvested grain culm;
It is composed of a locking and conveying device 7 that locks and guides the middle of the harvested grain culm, and the whole is swung around the horizontal axis _P1 of the reaping pretreatment section. The clamping conveyance device 6 is composed of a conveyance chain 6a with projections and a guide rail 6b biased toward the conveyance chain 6a, and the locking conveyance device 7 is constituted of a conveyance arm 7a and a fixed guide rail 7b. has been done.

The clamping and conveying device 6 extends almost linearly from the reaping device 3 side to the starting end of the feed chain 8 arranged on one side of the machine body, whereas the locking and conveying device 7 Immediately before feed chain 8, the conveyance path changes direction to the inside of the machine at a nearly right angle.
At this point (corresponding to the starting end of the horizontal transport route), the harvested grain culms that have been transported in an approximately standing position are
The stock side is transferred to the feed chain 8 while being swung to a sideways posture. The support rod 9, which has an inverted U shape when viewed from the front, to which both guide rails 6b and 7b are attached, is extended upward from the inside of the clamping and locking conveyance devices 6 and 7, and is switched to the sideways posture described above. It extends downward through the area.

A pair of limit switch type sensors 10 and 11 that detect the position of the tip of the harvested grain culm are attached to the support rod 9 at a location where the harvested grain culm switches to a sideways posture. A guide member 12 is arranged between the device 7 and the device 7 to guide the harvested grain culm from the outside. Then, on the terminal end side of the guide member 12, a portion 12a corresponding to the location where the reaped grain culm switches to the sideways posture is attached as shown in FIGS. 1 and 2.
As shown in the figure, it is deviated in a direction substantially along the conveyance direction of the feed chain 8.

As shown in FIGS. 3 and 4, the sensors 10 and 11 have sensing parts 10a and 11a that are swingable around vertical axes _P2 and _P3 located within the conveyance path of the harvested grain culm. There is. The entire sensors 10 and 11 are attached to the support rod 9 via support parts 13 and 14 so as to be able to swing and change their positions around the horizontal axes P ₄ and P ₅ , and both sensors 10 and 11 are connected to each other by an interlocking link. It is linked by 15. As a result, both sensors 1
The sensing portions 10a and 11a of both sensors 10 and 11 are configured to be able to change their positions in the vertical direction of the conveyance path without disturbing the positional relationship between the sensors 10 and 11.

The handling depth control is based on the signals from the sensors 10 and 11, so that the tip of the harvested grain culm is located between the two sensors 10 and 11, and the conveying device 5 is moved to the horizontal axis P ₁ of the pre-harvesting processing section. This is done by swinging it around.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the grain culm conveying device for a combine harvester according to the present invention, and FIG. 1 is a plan view of the conveying device, and FIG. 2 is a longitudinal sectional front view of the conveying device in the vicinity where the reaped grain culm switches to a sideways posture. , FIG. 3 is a plan view of the vicinity of the sensor, FIG. 4 is a front view of the vicinity of the sensor, and FIG. 5 is a side view of the front half of the combine harvester. 2... Threshing device, 5... Conveying device, 8... Feed chain, 10, 11... Sensor, 12...
...Guide member, 12a...A portion of the guide member that corresponds to the sideways conveyance path.

Claims (1)

[Scope of Claims] 1. The harvested grain culm is conveyed in a substantially standing position by holding the stock side thereof, and the harvested grain culm is transferred from the substantially standing position to a sideways position with the grain tip side lying sideways, and a flap provided on one side of the machine body is moved. The eed chain 8 is equipped with a conveying device 5 that transfers the stock side of the harvested grain culm which has been switched to the sideways posture. It is equipped with sensors 10 and 11 that detect the position of the tip of the culm, and a guide member 12 that guides the harvested grain culm from the outside between the sensors 10 and 11 and the conveying device 5, and the guide member 12 is conveyed sideways. A grain culm conveying device for a combine harvester in which a portion 12a corresponding to the path is offset in a direction substantially along the conveying direction of the feed chain 8.