JPH0125522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a reaping machine such as a combine harvester.
The present invention relates to a device that automatically controls direction by following grain culm rows.

Generally, this type of automatic direction control device uses a grain stalk sensor located in the grain stalk conveyance path as an operating switch, and the automatic direction control device is activated or stopped by turning on or off the switch. For this reason,
Due to the time difference between the start and stop of operation based on the mounting position of the direction sensor and grain culm sensor, the start of control is delayed at the entrance of the row, which tends to cause the machine to rush into the row, and the control stops at the exit of the row. was delayed and the aircraft was turned around more than necessary. Furthermore,
Since a grain culm sensor with a pressing force comes into contact with the grain culm that is being harvested and transported, when the amount of grain culm being transported is small, etc., the tip of the grain is likely to be delayed by the pressing resistance force, causing disturbance in transport. It also required a grain culm sensor with a waterproof and dustproof structure, which led to an increase in costs.

Therefore, the present invention provides a self-holding circuit that maintains the automatic control device in an operating state when the direction sensor detects the grain culm, and a reset circuit that releases the self-holding of the self-holding circuit based on the operation of the side clutch lever. It is an object of the present invention to provide an automatic direction control device for a reaper that eliminates the above-mentioned drawbacks by providing a grain culm sensor and eliminating the need for a grain culm sensor.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a machine body 3 supported by crawlers 2, and on one side of the front part of the machine body 3 is a driver's seat 6 having left and right side clutch levers 5, 5. Further, in the front of the machine, a reaping section 10 consisting of a large number of dividers 7, a pulling device 9, a grain culm conveying device, a cutting blade, etc. is disposed. A direction sensor 11 for horizontal mowing, which is a side sensor, is provided on the right side, that is, on the already cut side divider 7a part, and a direction sensor 11 for horizontal cutting, which is also a side sensor, is installed on the left side, that is, on the uncut side divider 7b part. A direction sensor 12 is provided. direction sensor 1
2 has a sensor arm 14 that protrudes to the right and is biased by a spring 13 to the upright position as shown in the figure, and the arm 14 is fixed to the base end. Cam 15
When the rotation range R is reached, the limit switch 16r for right rotation command is turned on, and when the rotation range L is turned on, the limit switch 16l for left rotation command is turned on, and furthermore, when the rotation range is within the rotation range N. In this case, both switches 16r and 16l are set to be turned off. On the other hand, side clutch lever 5
As shown in FIG. 3, the lever 5 is rotatably supported by the operation panel 17 and biased in the direction opposite to the arrow.By manually operating the lever 5 in the direction of the arrow, the side clutch is disengaged and the brake is applied. , and then turn the lever switch 19 from off to on.

Then, as shown in FIG.
Left and right solenoids 2 of the solenoid valves that operate the switches 16r, 16l and the side clutches
0l, 20r and lever switches 19, 19 are connected. In the figure, 21 and 22 are AND elements into which the inverted input signals are input, respectively.
It is a NOR element, and 23 and 24 are OR elements into which each inverted input signal is input, so it is a NAND
This element constitutes the self-holding circuit 25.
Furthermore, 26 is an inverter for inverting the signal, and 27 is a power-on reset circuit having a capacitor C.

Since the present embodiment has the above-described configuration, when the combine harvester 1 is in a state where the side clutch lever 5 is disengaged before the reaping operation and the automatic main switch (not shown) is turned on, the self-holding circuit 25 is turned on.
The signal O is input to the NAND element 24 until the side clutch lever 5 is turned on and the capacitor C of the reset circuit 27 is charged.
Signal 1 is output from the NAND element 24. This signal 1 is input to one gate of the NAND element 23, and the signal of the inverter 26 is input to the other gate of the NAND element 23.
Before the reaping operation, the grain culm is not in contact with the sensor arm 14, and therefore the switch 16r is in the on state, so the signal O is input to the inverter 26, and therefore the other gate of the NAND element 23 receives the signal. 1 is input. As a result, the NAND element 23 emits the signal O, and this signal O is input to the NAND element 24, so the output signal a of the self-holding circuit 25 becomes 1. And each NOR
Signal 1 is input to elements 21 and 22, and these elements 21 and 22 will issue output signal O regardless of the signals from switches 16l and 16r.
Direction control by the direction sensor 12 is not performed.

From this state, the combine 1 enters the row, the grain culm comes into contact with the sensor arm 14 of the direction sensor 12, and once the switch 16r is turned off, the signal 1 is input to the inverter 26, and therefore the signal O of the NAND element 23 is input, and further from the element 23
Signal 1 is input to the NAND element 24. Then,
NAND element 24 inputs signal O to element 23,
The element 23 receives an input signal of 1 from the inverter 26.
The output signal 1 continues to be emitted even after the current is reached, so that the self-holding circuit 25 is self-holding, and
The output signal a of the circuit becomes O. In this state,
A signal O is input to each NOR element 21, 22,
The operation of the direction sensor 12 brings the combine 1 into a state where the direction is controlled. Therefore, the grain culm does not contact the sensor arm 14 or contacts the sensor arm 14 only shallowly.
When it is in the rotation range R, the switch 16r turns on and inputs the signal O to the NOR element 22.
2 emits output 1, so the output stage transistor Tr
causes the solenoid 20r to turn the excitation combine harvester 1 to the right. Further, when the sensor arm 14 comes into deep contact with the grain culm and reaches the rotation range L, the switch 16l is turned on and inputs the signal O to the NOR element 21, and the NOR element 21 similarly emits an output 1 and outputs the output stage. The solenoid 20l is excited via the transistor Tr to turn the combine harvester 1 to the left.

Then, when the combine harvester 1 has finished one stroke of reaping work and reaches the edge of the field, the side clutch lever 5
When operated, the lever switch 19 is turned on and the capacitor C of the reset circuit 27 is discharged.
A signal O is input to the NAND element 24. Then, the self-holding of the self-holding circuit 25 is released, and the output signal a of the circuit 25 becomes 1. Therefore, as before the reaping operation, each NOR element 21,
Signal 1 is input to 22, and the direction control of the combine is not performed.

In addition, although the above-mentioned Example demonstrated the direction sensor 12 for row mowing, it goes without saying that it can apply similarly to the direction sensor 11 for horizontal mowing.

As explained above, according to the present invention, when the sensor arm 14 of the direction sensor 12 senses a grain culm, the self-holding circuit 25 is provided which maintains the automatic direction control device in an operating state, which is not required in the past. A grain culm sensor is not required, and this can prevent the aircraft from plunging into the row due to the difference in activation time between the direction sensor and the grain culm sensor, and prevent the aircraft from turning more than necessary. It is possible to prevent the transportation of grain culms from being disturbed, and it is possible to further reduce costs. Furthermore, when a grain culm comes into contact with the sensor arm 14 of the direction sensor 12, the automatic direction control device based on the direction sensor 12 itself is maintained in the operating state, so all Applicable to automatic direction control devices. Further, as soon as the sensor arm 14 of the direction sensor 12 comes into contact with the grain culm, the automatic direction control device is activated, and the side clutch levers 5, 5 are operated to turn the machine after one stroke of reaping work is completed. Then, the automatic direction control device is immediately deactivated, eliminating the gap between the actual mowing operation and the activation of the automatic direction control device. It is possible to prevent problems such as unnatural aircraft turning in certain parts. Furthermore, if the strip comes off during the mowing operation and the side clutch lever 5 is operated, the automatic direction control device is released and manual operation of the lever 5 takes priority, and the strip comes off and the side clutch lever 5 is operated. When the operation is stopped, the sensor arm 14 comes into contact with the grain culm again and returns to the automatic direction control state, allowing proper control to be performed at all times.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a combine harvester to which the present invention is applied, Fig. 2 is a sectional view showing its direction sensor, Fig. 3 is a side view showing a side clutch lever, and Fig. 4 is an embodiment of the present invention. It is an electric circuit diagram according to. 1...Reaper (combiner), 5...Side clutch lever, 12...Direction sensor, 14...
...Sensor arm, 16l, 16r...Switch for left/right turning command, 19...Lever switch, 25
...Self-holding circuit, 27...Reset circuit.

Claims (1)

[Claims] 1. One sensor arm protruding to one side issues a turning command in one direction in an upright state in which it does not contact the grain culm or is in shallow contact with the grain culm, and the arm issues a turning command in one direction. a direction sensor that issues a turning command in the other direction when the arm is in deep contact with the arm and has rotated greatly; and a direction sensor that issues a command to go straight between the upright state and the state where the arm has rotated greatly; A reaper comprising: an automatic direction control device that operates left and right side clutches based on a signal from the direction sensor; and left and right side clutch levers that manually operate the left and right side clutches, respectively; A self-holding circuit is provided for holding the automatic direction control device in an operating state based on a signal for releasing the command, and a reset circuit is provided for releasing the self-holding of the self-holding circuit based on a signal from the operation of the side clutch lever. An automatic direction control device in a reaper.