JPH0530407B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a contact-type device that swings backward in the direction of conveying the harvested grain culm, at the tip side of the conveyance path of the conveyance device that supplies the harvested grain culm to the threshing device. The present invention relates to a sensor structure for a combine harvester, in which a pair of sensors for detecting the presence or absence of a tip using a sensing portion are arranged along the culm direction, and each sensor is configured to be able to swing and change its position in the culm direction.

[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 achieved by installing a sensor that detects the position of the ear tip as described above in the conveying device that sends the harvested grain culm to the threshing device, and based on the signal from this sensor, the tip of the ear tip is always aligned with both sensors. An example of a structure using a limit switch type sensor is disclosed in JP-A-53-122526.

In recent years, both of the sensors have been pivoted so that their positions can be changed freely in the direction of the culm, allowing the handling depth control to be adjusted to the deep handling side or the shallow handling side depending on the situation of the grain culm. There is a configured model.

[Problem that the invention seeks to solve]

In the above-mentioned conventional structure in which the sensor is arranged in a swing position adjustable type, when swinging the sensor, it is necessary to swing both sensors separately.
This is a cumbersome configuration for the operator, and it is also necessary to provide a stopper for each sensor to determine the retraction limit of the sensing portion of the sensor, which undeniably leads to a complicated structure.

Here, the present invention focuses on the above-mentioned problem, and aims to improve the operability of the swinging operation of both sensors, and to simplify the structure around both sensors.

[Means for solving problems]

A feature of the present invention is that, in the sensor structure of the combine harvester described above, a link is provided across both sensors so that they can swing together, and the link is passed through the back of the sensing part of the sensor on the side of the tip stock. , the sensor is configured to restrict backward swinging that exceeds the set range of the sensing section by contact with the linkage link, and its functions and effects are as follows.

[Effect]

With the configuration as described above, if one sensor is oscillated by the interlocking structure using the interlocking link, the other sensor can also be oscillated in conjunction with this; Since it can also be used as a stopper for determining the retraction limit of the sensing section, at least one set of stopper structures can be omitted.

〔Effect of the invention〕

As described above, it is now possible to easily change the swinging position of both sensors, and by omitting the stopper structure of the sensing part of the sensor by using a dual-purpose member, the structure can be simplified and costs can be reduced. I was able to figure it out.

〔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 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. 3, 4, and 5, the conveying device 5 includes a clamping and conveying device 6 that clamps and guides the stock 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 constituted of a conveyance arm 7a and a fixed guide rail 7b. has been done.

The clamping and conveying 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 conveyor device 7 extends just before the feed chain 8 with a path approximately at right angles. 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. 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 two sensors 10, 11 and the locking and conveying device 7.
2 is placed. And this guide member 1
As shown in FIGS. 3 and 4, a portion 12a corresponding to the position where the reaped grain culm switches to a 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 and 2, the sensors 10 and 11 have sensing portions 10a and 11a that are swingable around vertical axes P ₂ and P ₃ and are located within the conveyance path of the harvested grain culm. The entire sensor 10, 11 is a support part 1
The sensors 10 and 11 are connected to the support rod 9 through the links 10 and 14 so as to be able to swing and change their positions around the horizontal axes P ₄ and P ₅ . , 11 is configured so that the positions of both sensors 10 and 11 can be changed in the vertical direction of the conveyance path without disturbing the positional relationship between the sensors 10 and 11.

As shown in FIG. 1 and FIG.
The sensing portion 11a is installed across both the sensors 10 and 11 through the rear of the sensing portion 11a, and the backward stroke limit of the sensing portion 11a is determined by its contact with the link 15. On the other hand, the backward stroke limit of the sensing portion 10a of the sensor 10 on the tip side of the tip is as shown in the figure.
It is determined by the contact with the curved part of the support rod 9 that supports the tip, and its backward stroke is set to be larger than the backward stroke of the sensing section 11a on the side of the tip stock base.

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 drawings]

The drawings show an embodiment of the sensor structure of a combine harvester according to the present invention, and FIG. 1 is a plan view of the vicinity of the sensor, FIG. 2 is a front view of the vicinity of the sensor, FIG. 3 is a plan view of the conveying device, and FIG. FIG. 5 is a longitudinal sectional front view of the conveying device in the vicinity where the grain culms are switched to the sideways posture, and FIG. 5 is a side view of the front half of the combine harvester. 2... Threshing device, 5... Conveying device, 10, 11
...Sensor, 10a, 11a...Sensing section, 15
...Links.

Claims (1)

[Claims] 1 Conveying device 5 that supplies the harvested grain culm to the threshing device 2
Contact-type sensing units 10a and 11 that swing backward in the direction of conveying the harvested grain culm are located on the tip side of the conveyance path.
A pair of sensors 1 detecting the presence or absence of the tip by a.
0 and 11 are arranged along the culm direction, and each of the two sensors 10 and 11 is configured to be able to swing and change its position in the culm direction. The connecting link 15 is constructed so as to be able to swing in conjunction with each other, and the connecting link 15 is passed behind the sensing section 11a of the sensor 11 on the side of the tip stock to prevent backward swinging beyond the setting range of the sensing section 11a. A sensor structure of a combine harvester configured to restrict movement by contacting with an interlocking link 15.