JPS6119612Y2 - - Google Patents

Description

[Detailed description of the invention] This invention maintains the cutting height within a set range based on the detection results of the cutting height detection sensor attached to the cutting section, which is attached to the machine so that it can be raised and lowered. The present invention relates to a reaping machine equipped with an automatic cutting height control device, which is equipped with a mechanism for automatically driving up and down.

In such a reaper equipped with an automatic cutting height control device,
In order to carry out reaping runs along the planted stem culm,
This machine is steered manually or automatically, but as the machine is steered, the cutting height detection sensor rides on the stump, and as a result, the cutting section is driven up and the cutting height is increased. This could easily lead to problems such as unreasonably high prices.

In view of these circumstances, the present invention has an object to maintain the cutting height within a set range regardless of the steering of the machine during reaping travel.

The automatic cutting height control device according to the present invention is characterized in that, in the above-mentioned harvester, a mechanism is provided that stops the operation of the drive lifting mechanism based on the detection result of the cutting height detection sensor when the machine is steered.

In other words, when driving straight ahead, the mowing height is maintained within the set range by operating the drive lifting mechanism based on the sensor detection results, but when the machine is steered, the drive lifting mechanism is automatically operated. Even if the cutting height detection sensor comes into contact with a stump, etc., which is a disturbance element for cutting height control, the cutting section will
Because it can be held at the height position before steering,
There is no cutting height control that results in unreasonably high cutting conditions caused by the sensor running over the stump, and regardless of the machine's steering, the cutting height is maintained within the set range and always performs appropriate cutting height control. I was able to do this.

Hereinafter, an embodiment of the present invention will be described based on the drawings. The front part of the machine 3, which is equipped with a crawler traveling device 1 and a threshing device 2, includes a weeding tool 4, a pulling device 5, a reaping device 6, and a reaped grain. A reaping section 8 equipped with a device 7 for conveying and supplying culms to the threshing device 2 is installed in series so that it can be raised and lowered, and the reaping section 8 is equipped with a cutting height detection sensor 9
and a mechanism 10 for automatically driving up and down so that the cutting height is maintained within a set range based on the detection result of the cutting height detection sensor 9. (an example of a reaper), the sensor 9 and drive lifting mechanism 10 are constructed as follows.

The sensor 9 includes a pair of left and right grounding bodies 9a, 9 that swing up and down separately as the reaping section 8 moves up and down.
a′ are provided at appropriate intervals in the lateral direction,
When the cutting height exceeds the set range, the grounding body 9
When the normally open lowering switches S ₁ and S ₁ ′, which are closed by being pressed by the lower switches S 1 and 9 a′, are connected in series, and when the cutting height falls below the set range, the grounding bodies 9 a and 9 a′ are connected in series.
Normally open type lowering switches S ₁ and S 1 ' that are closed when pressed by 9a' are connected in series, and when both lowering switches S ₁ and S _{1 '} are closed, a lowering signal is generated. In addition to outputting the
It is configured to output a rising signal when both S ₁ and S ₁ ' are closed, and to output a rising/lowering stop signal when the S 1 and S 1 ' are both closed.

The drive elevating mechanism 10 includes an electromagnetic valve 10 for a hydraulic cylinder 10A that drives the reaping section 8 to move up and down when the output signal of the sensor 9 is a descending signal.
B to the lower position, and when the output signal is a rise signal, the solenoid valve 10B is operated to the raise position, and when the output signal is a lift stop signal, the solenoid valve 10B is operated to the neutral position where the lift is stopped. It is configured by providing a controller 10C.

Thus, a mechanism 11 is provided for stopping the operation of the drive elevating mechanism 10 based on the detection result of the sensor 9 when the main machine 3 is steered.

The stop mechanism 11 includes operation levers 13 and 1 for a pair of left and right steering clutches 12 and 12', respectively, which are interposed in the transmission system for the crawler traveling device 1.
3' is steered to the clutch disengaged position, that is, when the operating levers 13, 13' are pressed to close the controller 10C, the controller 10C is activated in priority over the output signal of the sensor 9. 10B
It is constructed by providing switches S ₃ and S ₃ ' which output a signal for switching the actuating state to the neutral position.

FIG. 6 shows another embodiment, in which the entire sensor 9 is pivoted so as to be able to swing left and right around the vertical axis, so that the sensor 9 can be rotated in accordance with the steering operation of the machine 3. The stop mechanism 11 is configured to swing left and right.
, switches S ₄ and S ₄ ' are provided which output a switching signal in the same way as the switches S ₃ and S ₃ ' of the above embodiment by closing when the sensor 9 swings left and right by a certain amount or more. It is composed of

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping machine with an automatic cutting height control device according to the present invention, in which Fig. 1 is a side view of the main part, Fig. 2 is a schematic plan view of the main part, and Fig. 3 is a part of the main part. FIG. 4 is a perspective view of the main parts, FIG. 5 is a control circuit diagram, and FIG. 6 is an enlarged plan view of the main parts showing another embodiment. 3... This machine, 8... Reaping section, 9... Cutting height detection sensor, 10... Drive lifting mechanism, 11... Stopping mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] The cutting height of the cutting unit 8, which is connected to the machine 3 so as to be able to rise and fall freely, is maintained within the set range based on the detection result of the cutting height detection sensor 9 attached to the cutting unit 8. In the reaping machine equipped with an automatic cutting height control device which is equipped with a mechanism 10 for automatically driving up and down, when the main machine 3 is steered, the driving up and down mechanism 10 is installed based on the detection result of the cutting height detection sensor 9. A reaper with an automatic cutting height control device, characterized in that it is provided with a mechanism 11 for stopping the operating circle. A reaper with an automatic cutting height control device according to claim 1, wherein the stop mechanism 11 is operated in conjunction with a steering operation. The scope of the utility model registration claim is that the above-mentioned stop mechanism 11 operates in conjunction with the swinging of the cutting height detection sensor 9 above a certain level around the vertical axis in conjunction with the steering operation of the machine 3. A reaper with an automatic cutting height control device according to item 1.