JPS596Y2 - Combine control automatic switching device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combine harvester, and more particularly to an automatic control switching device for a combine harvester that automatically switches control between vertical tree-line division and tree-line horizontal division.

A combine harvester uses a weed cutting device installed at the front end of the machine to plow through the culms in the field, and then uses a lifting device to raise up the fallen culms and harvest them.

Figures 1 and 2 are a side view and a front view of main parts of an example of a combine harvester, in which a fuselage 1 is installed on a traveling device 2 having crawlers, and a cockpit 3, operating rods 4, etc. Various devices are provided.

A weed cutting body 6 is provided at the front of the machine to determine the cutting width by cutting through the culms 5 in the field.

This weeding body 6 pushes and supports the base of the culm 5 inwardly by the outer weeding body 6 as the combine runs.

The lifting lug 7a of the lifting device 7 runs there, scoops up this culm 5, and pulls it up straight as the lifting lug 7a runs.

8 is a cutting blade for cutting this raised culm 5,
It is pivotally attached to the lower part of the fuselage 1 and is configured to swing by a hydraulic cylinder 9.

Therefore, the cutting edge moves up and down due to this swinging motion, changing the cutting height with respect to the culm 5.

10 is a stay extending from both ends of this cutting blade 8, and a side sensor 11 is fixed to the tip thereof.

An actuator 11 is mounted on the top of this side sensor 11.
The actuator 11a is rotatably provided, and this actuator 11a projects horizontally toward the outside of the fuselage 1, and rotates when it comes into contact with the shell culm 5.

Further, this side sensor 11 is connected to a travel drive section, and moves the combine harvester backward by rotation of an actuator 11a.

A cutting height sensor 12 is attached to the lower surface of the stay 10 continuously behind the side sensor 11.

The actuator 12a of this cutting height sensor 12 is rotatably protruded downward, and its tip always contacts the ground and moves up and down according to the height of the ground.

This cutting height sensor 12 is connected to the hydraulic cylinder 9.
As the actuator 12a rotates, this hydraulic cylinder 9 is actuated, and the cutting blade 8 and the stay 10 move up and down in unison.

In this case, in the combine harvester with the above configuration, the reaping direction for the culms planted in rows, that is, the distance between the culms is significantly different between vertically and horizontally planted trees, so the detection sensitivity of the direction control system is reduced. If you match it with the vertical division of the trees,
If the aircraft turns 90 degrees and splits horizontally in a row of trees, the distance between the shell culms becomes longer, and the direction sensor sends out pulse signals with longer intervals. It has the disadvantage that the direction is controlled.

For this reason, in the conventional combine harvester, work was carried out by manually switching the control circuit between vertically dividing trees and horizontally dividing trees.

However, when reaping while rotating, the reaping direction is different for each side of the field.
The switching operation is extremely complicated and has various drawbacks, such as the fact that the operation is often performed incorrectly.

Therefore, an object of the present invention is to provide an automatic control switching device for a combine harvester that automatically switches control between vertical tree-line splitting and horizontal tree-line splitting.

Hereinafter, it will be explained in detail using the drawings. FIG. 3 is a main circuit diagram showing an embodiment of an automatic switch control device for a combine harvester according to the present invention, in which 15 is an automatic switch;
6 is a discrimination control circuit connected to the power supply +■ via an automatic switch 15; DA converter 1 that converts to voltage
8, a comparator 20 that compares the output of this DA converter 18 with a reference voltage set by a variable resistor 19, and controls a relay 21 by performing an on/off operation based on the comparison result of the comparator 20. It is composed of a switching circuit 22.

Reference numeral 23 denotes a tree-lined vertical division control circuit that performs direction control based on the culm detection signal of the double-sided direction sensor 24, and is connected to the positive pole of the power source via the normally open contact 21a of the relay 21 and the automatic switch 15.

Reference numeral 25 denotes a tree-line horizontal splitting control circuit that performs direction control based on the culm detection signal of the side direction sensor 26, and is connected to the power source via the normal cross contact 21b of the relay 21 and the automatic switch 15.

In the combine harvester control automatic switching device configured in this way, when the automatic switch 15 is closed, the discrimination control circuit 16
is activated.

If a combine harvester performs horizontal cutting of a row of trees in this state,
The discrimination sensor 17 detects culms at relatively long intervals and sends out a low frequency pulse signal.

The detection signal of this discrimination sensor 17 is converted into a corresponding analog signal in a DA converter 18.

This analog signal is applied to a variable resistor 19 in a comparator 20.
compared with the reference value set by

In this case, the reference value is the DA converter 18 at the time of horizontal splitting.
It is set to a value larger than the output of the DA converter 18 and smaller than the output of the DA converter 18 at the time of vertical division of trees.

Therefore, in the above case, the comparison output is not sent out, and thereby the switching circuit 22 is also turned off.

As a result, the relay 21 becomes inoperable and its contact 21
b is closed, only the tree-lined horizontal division control circuit 25 operates in response to the output of the side sensor 26, and direction control is performed accordingly.

Next, when the trees are lined vertically, the interval between the culms becomes relatively short, and the output pulse frequency of the discrimination sensor 17 becomes high.

As a result, the output of the DA converter 18 becomes larger than the reference value, and a comparison output is sent from the DA converter 18.

When the comparison output is sent out from the comparator 20, the switching circuit 22 is turned on and the relay 21 is excited.

When the relay 21 is energized, the contact 21a closes and only the tree-lined vertical division control circuit 23 is operated, thereby ensuring the tree-lined vertical division control.

In the above-mentioned embodiment, only the case where a double-sided sensor is used as a sensor for vertically dividing a row of trees has been described, but it goes without saying that a side sensor may also be used.

As explained above, the combine harvester control automatic switching device according to the present invention extracts pulses with a frequency corresponding to the culm spacing by detecting the culms with a discrimination sensor, and divides the rows of trees vertically based on the magnitude of the pulse frequency adjustment. Since the control is switched by determining whether or not the row of trees is horizontally divided, it has an excellent effect of being able to perform reliable control despite its simple configuration.

[Brief Description of the Drawings] Fig. 1 and Fig. 2 are a side view and a front view of main parts showing an example of a combine, and Fig. 3 is a circuit showing an embodiment of an automatic control switching device for a combine harvester according to the present invention. It is a diagram. 15... automatic switch, 16... control circuit for discrimination, 17... sensor for discrimination, 18...
...DA converter, 19... Variable resistor, 2
0... Comparator, 21... Relay, 22
......Switching circuit, 23...Namiki vertical division control circuit, 24...Double-sided direction sensor, 25
...Namiki horizontal division control circuit, 26...Side direction sensor.

Claims (1)

[Scope of utility model registration request] In a combine harvester that raises the culms that have been raked by a tiller and reaps them with a cutting blade, there is a discrimination sensor that detects the interval between the culms and sends out a pulse signal, and a periodicity of the pulse signal sent from the discrimination sensor. An automatic control switching device for a combine harvester, characterized in that it is provided with a discrimination control circuit for discriminating between vertical tree-lined division and tree-lined horizontal division, and performs tree-lined vertical division control and tree-lined horizontal division control according to an output signal of the discrimination control circuit.