JPH0228290B2 - KONBAIN - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combine harvester that detects culm length and adjusts handling depth based on the detection result.

Conventionally, handling depth adjustment in combine harvesters has been carried out by installing culm length detection sensors at two locations a predetermined distance apart in the culm length direction, such as the one disclosed in Japanese Patent Application Laid-Open No. 55-114219, at a position corresponding to the tip of the culm. When detecting the presence or absence of contact between the tip of the grain culm and the ear, if both contact sensors are in a non-contact state, the handling depth is adjusted to the deeper handling side, and the handling depth is adjusted to the deeper handling side. If both contact sensors are in contact, the handling depth is adjusted to shallower, and of both contact sensors, the contact sensor located near the base of the grain culm is in contact, and the other contact sensor is in non-contact. I tried to adjust the depth of treatment to a state between deep treatment and shallow treatment. In particular, the above-mentioned Japanese Patent Application Publication No. 55-114219
What is disclosed in the publication is that a handling depth adjustment device is provided on the upper side of the grain culm conveyance than the culm length detection sensor,
By operating the handling depth adjusting device based on the detection by the culm length detection sensor, it was attempted to maintain a proper handling depth state in which the tip of the grain culm is located between the two contact sensors as much as possible.

However, in the conventional method described above, culm length is detected only by the presence or absence of contact between two fixedly installed contact sensors, which results in rough culm length detection, making it difficult to detect grain culm length in detail. At the same time, the handling depth cannot be controlled accurately according to the culm length, resulting in shallow handling, or
There was a great possibility that paddy with branches would occur.

Therefore, as a structure for accurately detecting culm length,
It is possible to construct a culm length detection sensor by arranging a large number of contact sensors in parallel in the culm length direction, but the disadvantage is that the structure of the culm length detection sensor itself becomes complicated, and the signal processing from the culm length detection sensor becomes complicated. There is.

The present invention has been made in view of the above-mentioned circumstances, and provides a culm length detection sensor for controlling the handling depth that has a simple structure, yet performs detailed culm length detection to perform accurate handling depth control. The purpose is to provide a combine harvester that can.

In order to achieve the above object, the combine harvester according to the present invention is provided with a device that reciprocates a culm length detection contact sensor in the direction of the culm at a substantially constant period, and correlates the contact time and non-contact time per set time of the sensor. The present invention is characterized in that it is provided with a calculation mechanism that calculates the average culm length based on the calculation mechanism, and a mechanism that automatically controls the handling depth control device based on the average culm length information calculated by the calculation mechanism.

The effects of this characteristic configuration are as follows.

In other words, by reciprocating the culm length detection sensor in the culm length direction, the contact time and non-contact time of the sensor with respect to the grain culm per set time change in an analog manner according to the culm length. When the handling depth control device is automatically controlled based on the average culm length calculated by correlation with the non-contact time, compared to the conventional digital method that detects the culm length based on the presence or absence of contact with the grain culm. The handling depth can be controlled in detail according to the culm length, the handling depth can be controlled more precisely, the occurrence of unhandled paddy or paddy with branches can be minimized, and only a small number of contact sensors can be used. This has the advantage that the sensor structure is simple.

Next, embodiments of the present invention will be described based on the drawings.

A pretreatment frame 3 that can be driven and oscillated around a horizontal axis is attached to the front of the crawler traveling device 2 on which the threshing machine 1 is mounted, and a pulling device 4,
A reaping device 5, a device 6 for merging and conveying the harvested grain culms, and a conveying device 8 for supplying the merged grain culms to the threshing feed chain 7 are provided, and the conveying device 8 is connected to the grain culms with the rear side thereof as the center. A cylinder 9 for swinging the inheritance start end in the direction of the culm is provided to constitute a handling depth control device 10, and an automatic control device 11 for the handling depth control device 10 is provided. A control section 12 is disposed on one side to constitute a combine harvester for reaping and threshing planted grain culms.

To configure the automatic handling depth control device 11, three contact-type sensors 13 for detecting the culm length of the lifted grain culm are spaced at equal intervals in the culm length direction on the back of the lifting device 4. The reciprocating device 14 allows the sensors 13 to be reciprocated in the direction of the culm at a substantially constant period over a distance corresponding to the interval, and the drive reciprocating range is controlled by manual remote control. is configured to be changeable in its reciprocating direction, and the time taken for the grain culm to reach the jamming end of the handling depth control device 10 from the sensor 13 is set as a set time, and the sensor 13 is set per the set time. A mechanism 15 is provided that calculates the average culm length of the transferred grain culms within the set time based on the correlation between the contact time and non-contact time with respect to the grain culms of... A mechanism 16 is provided to automatically control the positioning of the depth control device 10 to a position corresponding to the culm length.

That is, the average culm length of grain culms at each set time is digitally detected by the rocking sensor 13, and based on the detected information, the processing depth is determined in an analog manner while suppressing control time delays. It is designed to be controlled.

The automatic control mechanism 16 includes a potentiometer 1 that detects the swinging position of the conveyance device 8.
7, the position detection information by the potentiometer 17 and the average culm length detection information by the calculation mechanism 15 are input to the mechanism 18 that switches and controls the control valve v of the cylinder 9. The handling depth control device 10 is controlled in an analog manner until the difference disappears.

Incidentally, it is preferable that the number of sensors 13 is increased because the amount of reciprocating movement of the sensors 13 can be reduced at a substantially constant period, but control is possible even if only one sensor 13 is provided. In addition, by making it possible to change and set the reciprocating range of the sensor 13, if the tip of the grain culm seems to be drooping when detecting the culm length, the sensor 13 can be lowered by a corresponding distance. Then, the grain culm can be controlled to be regarded as being in a substantially upright state, but instead, the automatic control device 11 may be configured to have a length correction function, and the control device 11 may be configured to have a length correction function. The specific structure of can be changed in various ways.

Note that although numbers 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 a combine harvester according to the present invention, and FIG. 1 is a side view of the front part of the combine, and FIG. 2 is a configuration diagram of an automatic handling depth control device. 10... handling depth control device, 13... contact sensor for culm length detection, 14... reciprocating device, 15...
Calculation mechanism, 16... Automatic control mechanism.

Claims (1)

[Scope of Claims] 1. A device 14 for reciprocating a culm length detection contact sensor 13 in the culm direction at approximately constant intervals is provided, and the average culm length is determined based on the correlation between the contact time and non-contact time per set time of the sensor 13. A combine harvester characterized in that it is provided with a calculation mechanism 15 that calculates , and a mechanism 16 that automatically controls a handling depth control device 10 based on the average culm length information calculated by the calculation mechanism 15. 2. During the set time, the grain culm is almost reached by the sensor 1.
3. The combine harvester according to claim 1, wherein the combine harvester is set to the time from 3 to reach the handling depth control device 10. 3. The combine harvester according to claim 1 or 2, characterized in that a plurality of the sensors 13 are provided in the direction of the culm.