JPS635459Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combine harvester equipped with an automatic control device such as direction control or cutting height control.

Conventionally, a combine harvester has been proposed that is equipped with a sensor that detects the presence or absence of grain culms to be harvested, and stops traveling if there are no grain culms to be harvested and an operator is not in the driver's seat. However, with this combine harvester, even if the direction sensor failed and the combine did not move in the specified direction, it would continue to run out of control if there were grain culms to be harvested.

Therefore, this invention has a timer that emits a signal when no signal is sent from the sensor of the automatic control device for a certain period of time, or when only one signal is sent continuously for a certain period of time, and a timer that emits a signal when there is no operator in the driver's seat. an operator detection switch that senses the movement of the combine harvester, a travel stop device that stops the combine harvester from traveling, and an alarm device, the alarm device is activated based on a signal from the timer, and when the timer sends a signal, the When the operator detection switch detects the absence of an operator, the travel stop device is configured to operate, and if the operator is in the driver's seat, the alarm device switches the operator to manual operation, and the operator also stops driving. The object of this invention is to provide an automatic control safety device that solves the above-mentioned problem by immediately stopping the vehicle when the vehicle is not in its seat.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

As shown in FIG. 1, the pre-processing section 2 of the combine harvester 1 has a divider 3, a cutting blade 4, and a conveyance chain 5. Furthermore, the divider 3 at the right end has a direction sensor 6, and the conveyance chain 5 has a direction sensor 6. are each provided with a grain culm detection sensor 7. As shown in detail in FIG. 3, the direction sensor 6 has a sensor arm 8 rotatably supported by the divider 3, and the arm 8 is always biased clockwise by a spring. Further, a cam 11 is fixed to the pivot shaft 10 of the sensor arm 8, and two limit switches 12 and 13 are arranged adjacent to the cam 11. Therefore, the direction sensor 6 operates the limit switch 12 when the arm 8 rotates to the position A in FIG. Turn right. Also, sensor arm 8
When it rotates to position C, the limit switch 13 is activated, and the left solenoid 14b of the solenoid valve 14 is activated to disengage the left operating clutch 15, causing the combine 1 to turn to the left. In addition, arm 8
is in the B position, both limit switches 12,
13 does not operate, and combine harvester 1 moves straight. The grain culm detection sensor 7 has a sensor arm 16, and when the grain culm being conveyed comes into contact with the arm 16, the limit switch 7a is turned on. On the other hand, the driver's seat 17 of the combine harvester 1, as shown in detail in FIG. There is. The seat bottom plate 18 and the seat sheet 19 are provided with springs 22,
23, and further below these are operator sensing switches 25, 25. Therefore, when the operator stands on the seat bottom plate 18 or sits on the seat 19, each operator sensing switch 25, 25 is switched to the closed state. Further, the automatic control circuit of the present invention is provided with a timer relay 27,
Timer relay 27 operates when no signal is sent from either limit switch 12 or 13 of direction sensor 6 for a certain period of time, and closes contact 27a. Further, a travel stop device 28 is provided,
When the timer relay 27 is activated and the operator sensing switches 25, 25 sense the absence of an operator, the travel stop device 28 activates the solenoid 28.
The travel of the combine 1 is stopped by activating the lever a and simultaneously disengaging both left and right steering clutches 15 or by disengaging the traveling clutch. Note that 30 is a main switch for automatic control, and 31 is a battery.

Next, the operation of the present invention will be explained based on the block diagram shown in FIG. When the combine 1 is run in the field with the automatic control main switch 30 turned on, the grain culm cut by the cutting blade 4 is sent to the conveyance chain 5, and the limit switch 7a of the grain culm detection sensor 7 is closed. As a result, the limit switches 12 and 13 of the direction sensor 6 are activated when the combine 1 moves out of the grain culm row, and the solenoids 14a and 14b of the solenoid valve 14 are actuated to operate the steering clutch 15 and the combine harvester is moved along the grain culm row. Run 1. Now, the direction sensor 6 has failed, and both limit switches 12 and 1
When the signal from 3 dies for a predetermined time, the timer relay 27 is activated to close the contact 27a. As a result, when the operator is in the driver's seat 17, the operator detection switch 25 is in an open state, and therefore only the alarm device 21 such as the buzzer 21a is energized to notify the operator of the failure of the direction sensor 6. Based on this alarm, the operator can take manual action. Further, when the operator is not in the driver's seat 17 due to replacing the paddy bag, etc., the operator detection switch 25 is switched to the closed state,
When the alarm device 21 is activated, the combine 1 is stopped by the traveling stop device 28.

In addition, Fig. 4 shows the timer relay 27 for simplicity.
is installed after the solenoids 14a and 14b, but in reality it is installed before the dead timer that prevents the automatic direction control from operating due to interplant or missing stock, and the limit switches 12 and 1 are always operated by the sensor arm 8.
3 is detected and the combine harvester 1 is normally moving straight, the timer relay 27 is not activated. Furthermore, in the above embodiment, the limit switches 12 and 13 of the direction sensor 6 are out of order and no signal is emitted. Of course, even when only one signal is sent continuously for a certain period of time, such as when contacting only the limit switch 13, the timer relay 27 may be activated to close the contact 27a. be.

As explained above, according to the present invention, if the signal from the direction sensor 6 does not flow for a certain period of time, or if only one signal continues to flow for a certain period of time, an alarm is issued. It is possible to promptly notify an operator of a malfunction of the combine harvester 6 and prevent the combine 1 from being largely removed from the row or the like. Also, if the operator is in the driver's seat 17
If the combine harvester 1 is not in the vehicle, a warning is issued and the combine harvester 1 stops running, thereby preventing the combine harvester 1 from running out of control.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the front part of the combine to which the present invention is applied, Figure 2 is a side view of the driver's seat, and Figure 3 is a side view of the driver's seat.
FIG. 4 is a plan view showing the direction sensor, FIG. 4 is a circuit diagram according to the present invention, and FIG. 5 is a block diagram for explaining the operation. 1... Combine harvester, 6... Direction sensor, 17
... Driver's seat, 21 ... Alarm device, 25 ... Operator sensing switch, 27 ... Timer relay, 2
8...Travel stop device.

Claims (1)

[Scope of utility model registration request] In a combine harvester equipped with an automatic control device that has a sensor that emits one or the other signal across the appropriate control position, if no signal is sent from the sensor of the automatic control device for a certain period of time, or if only one signal is continuously sent. A timer that emits a signal when a signal is sent for a certain period of time, and an operator detection switch that detects when there is no operator in the driver's seat.
a travel stop device that stops traveling of the combine harvester; and an alarm device, the alarm device is activated based on a signal from the timer, and when the signal from the timer is issued, the operator sensing switch is activated to detect the absence of an operator. An automatic control safety device configured to activate the travel stop device when a sensing condition is present.