JPH0530405B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of threshing by holding the stock side of the harvested grain culm and transporting it in a substantially standing position, and switching from the substantially standing position to the sideways position of the ear side. The present invention relates to a grain culm conveying structure for a combine harvester, which is equipped with a conveying device for feeding grain into the device, and a contact type sensor for detecting the position of the ear tip is arranged at a position on the ear tip side at the starting end of the sideways conveyance path so as to act from outside the conveyance path.

[Conventional technology]

In a combine harvester, in order to maintain threshing efficiency, so-called handling depth control is performed so that the grain-bearing part of the harvested grain culm is fed to the optimal position of the threshing device. This handling depth control is carried out based on the signal from a sensor that detects the position of the grain tip installed in the conveying device that sends the harvested grain stalks to the threshing device, as described above. An example of a structure using this is disclosed in Japanese Unexamined Patent Publication No. 53-122526 and Japanese Utility Model Application No. 54-22038.

[Problem that the invention seeks to solve]

At the starting end of the sideways conveyance path where the conveyance path changes from a standing posture to a sideways posture, the grain tip side is swung around when the posture is changed, and the grain culm is turned outward by centrifugal force. Therefore, if a limit switch type sensor is placed at this position, even if the amount of grain culm is relatively small, the grain culm will be pressed against the sensor by this centrifugal force, and the presence of the grain tip can be accurately detected. When the amount of culms is small, the centrifugal force caused by swinging is insufficient and the presence of the tips cannot be properly detected, which may impede handling depth control.

The present invention has focused on the above-mentioned problem, and aims to provide a structure in which the presence of grain tips can be accurately detected even if the amount of grain culms being conveyed is small.

[Means for solving problems]

A feature of the present invention is that in the grain culm conveying structure of the combine harvester described above, the reaped grain culm is slidably guided from the inside of the conveyance path, and a guide member that can be elastically retracted inward is provided in the conveyance path facing the sensor. The functions and effects are as follows.

[Effect]

By providing the guide member as described above, even if the amount of grain culm being conveyed is small, in addition to the centrifugal force of swinging at the starting end of the conveyance path, the guide member will cause the tips of the grain culms to move outward. will be guided to the sensor side. On the other hand, if a sufficient amount of grain culm is conveyed, the guide member elastically retreats inward, so that it does not interfere with the conveyance of the grain culm.

〔Effect of the invention〕

As described above, it has become possible to accurately detect the presence of the tip of grain culms being transported using at least a sensor, and it has become possible to accurately control the handling depth regardless of the amount of grain culms. .

〔Example〕

The embodiments of the present invention will be described above based on the drawings.

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

As shown in FIGS. 1, 2, and 4, the conveying device 5 includes a clamping and conveying device 6 that clamps and guides the base of the harvested grain culm.
and a locking and conveying device 7 that locks and guides the middle of the reaped grain culm, and the whole is driven to swing 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 composed of a conveyance arm 7a and a fixed guide rail 7b. It is configured.

The clamping conveyance device 6 extends in a substantially straight line from the reaping device 3 side to the starting end of the feed chain 8, whereas the locking conveyance device 7 extends in a substantially straight line just before the feed chain 8. The direction is changed to the inside of the body, and in this part, the harvested grain culm, which has been conveyed in a substantially standing position, is handed over to the feed chain 8 in a sideways position while being swung around. Then, the support rod 9, which has an inverted U-shape when viewed from the front, to which both the guide rails 6b and 7b are attached, is extended upward from the inside of both the transport devices 6 and 7, and the position is switched to the above-mentioned sideways posture. It extends downward through the.

A pair of limit switch type sensors 10 and 11 for detecting the position of the ear tip of the harvested grain culm are connected to the support rod 9.
A guide member 1 is installed at a location where the harvested grain culm switches to a sideways posture, and guides the harvested grain culm between the sensors 10, 11 and the locking and conveying device 7.
2 is placed. And this guide member 1
As shown in the figure, a portion 12a corresponding to the position where the harvested grain culm switches to the sideways posture on the terminal end side of the grain culm 2 is deviated outward. As a result, the reaped grain culm is moved outward, that is, toward the sensors 10 and 11 by the centrifugal force when the harvested grain culm changes to the sideways posture.

As shown in FIGS. 1, 2, and 3, on the guide plate 13 that forms the inner side surface of the conveyance path for the cut grain culm, the cut grain culm is placed on the outer side, that is, at a position facing the sensors 10 and 11. 10,11
A guide member 14 is installed to guide the user to the side. The guide member 14 is made of an elastic plate and has a cantilever shape facing backward, so that when a large amount of harvested grain culm is fed into the guide member 14, it elastically retreats inward so as not to impede the conveyance of the harvested grain culm. It is composed of

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 structure of a combine harvester according to the present invention, and FIG. 1 is a plan view of the conveying device, FIG. 2 is a side view of the conveying device, and FIG. 3 is a plan view of the vicinity of the guide member. Figure 4 is a side view of the front half of the combine. 2... Threshing device, 5... Conveying device, 10, 11
...Sensor, 14...Guide member.

Claims (1)

[Claims] 1. It is equipped with a conveying device 5 that grips and conveys the harvested grain culm in a substantially standing position, switches the head side from the approximately standing position to a horizontally fallen position, and sends it to the threshing device 2. a contact type sensor 10 for detecting the tip position on the tip side of the tip;
A grain culm conveying structure of a combine harvester in which a grain culm 11 is arranged to act from the outside of the conveyance path, and a guide member 14 that slides and guides the harvested grain culm from inside the conveyance path and is elastically retractable inward. The sensor 1
Grain culm conveyance structure of the combine installed at the inner side of the conveyance path opposite to 0 and 11.