JPS6432Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for use in mobile agricultural machinery, particularly combine harvesters equipped with automatic control devices for direction, cutting height, etc.

Traditionally, operators of mobile agricultural machines did not have to leave the machine during work, but recently, with the advent of combine harvesters equipped with automatic control devices, it is now possible for operators to leave the machine even during harvesting without stopping the combine harvester. There is a risk that an unexpected accident such as an operator being run over by a combine harvester may occur.

Therefore, the present invention provides a mobile agricultural machine having a switch for detecting the working state, a warning horn, and a travel clutch pedal, in which a pyroelectric infrared sensor is installed in front and/or after the mobile agricultural machine, and the sensor detects when the switch is working. A holding means is provided which operates only while the condition is being detected and reacts when there is a person within a predetermined distance to stop the aircraft from moving and hold it in the stopped state. The present invention is characterized in that it is provided with a release means that is released by pressing the pedal, and aims to prevent the above-mentioned accidents and provide a simplified safety device for mobile agricultural machinery.

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

The combine harvester 1 equipped with an automatic control device is
As shown in the figure, it has a machine body 3 supported by crawlers 2, and a pre-processing section 5 is located in front of the machine body 3.
A driver's seat 6 is arranged on one side of the front part of the fuselage 3. A forward pyroelectric infrared sensor 7 is installed at the front of the preprocessing section 5, and a rear pyroelectric infrared sensor 9 is installed at the rear of the aircraft body 3. . The pyroelectric infrared sensors 7 and 9 utilize the pyroelectric effect, and as shown in Figure 2, when a human body enters the sensor range and infrared input I is input, there is a short period of time until a new equilibrium state is reached. The sensor outputs the surface charge generated in proportion to time and amount of incident infrared radiation.
It is extracted as follows.

Then, as shown in FIG. 3, the front sensor 7
and rear sensor 9 are connected to battery 11 via grain culm detection switch 10, and both sensors 7, 9 are connected to switches 12, 1 which are turned on in response.
3, and further includes amplifier circuits 15, 16 and sensitivity adjustment volumes 17, 19, respectively. Further, a relay 20, left and right solenoids 21 and 22 of the solenoid valves that control the steering clutch, a warning horn 23, and a timer 25 are connected in parallel to both sensors 7 and 9, and are turned on when the relay 20 is energized. A relay switch 20s is interposed in parallel with both sensors 7 and 9. Further, a travel clutch switch 26s is connected in series with the relay 20, and the switch 26s is turned off when a travel clutch pedal 26 disposed on the driver's seat 6 is depressed, as shown in FIG. Further, a timer contact 25s is connected in series with the horn 23, and is turned off by a timer 25 after a predetermined period of time has elapsed.

Since the present embodiment has the above-described configuration, during reaping work with the combine harvester 1, in an unmanned state where the operator is away from the machine, or in a manned state where the operator is in the driver's seat 6, the operator can move within a predetermined distance in front and behind the combine harvester 1. When a person such as an operator enters, the front or rear pyroelectric infrared sensors 7 and 9 react. At this time, the grain culm detection switch 10 is on because the harvesting work is in progress, and the sensor 7 or 9 outputs an output from the battery 11 via the switch 10, energizing the left and right solenoids 21 and 22 to Both clutches are released to stop the aircraft from moving, and the warning horn 23 is energized to sound the horn. At the same time, the relay 20 is also energized, turning on the relay switch 20s, and due to its characteristics, the pyroelectric infrared sensor 7 or 9 reaches a new equilibrium state in a relatively short time and no longer shows an output O. The circuit is kept energized via switch 20s. At the same time, the timer 25 is also energized and activated, and when a predetermined period of time has elapsed, the timer contact 2
5s is turned off and the warning horn 23 stops sounding. Then, when the operator returns to the stopped combine harvester 1 and depresses the traveling clutch pedal 26,
The switch 26s is turned off, the power supply to the relay 20 is cut off, the relay switch 20s is turned off, and the excitation of the left and right solenoids 21 and 22 is released. As a result, the combine harvester 1 runs again and resumes the reaping work.

As explained above, according to the present invention, if there is a person within a predetermined distance in front of or behind the aircraft, the pyroelectric infrared sensor 7 or 9 will react and automatically stop the aircraft from moving. Even when an operator is working on a mobile agricultural machine equipped with the device in an unmanned state away from the machine, accidents such as the operator being run over by the mobile agricultural machine can be prevented.
Moreover, since the above-mentioned running stop is canceled when the clutch pedal 26 is depressed, the mobile agricultural machine 1 can be run again in the same way as when starting normal running, and no troublesome operations are required. Furthermore, while it is possible to reliably prevent accidents such as the operator being run over by a mobile agricultural machine during work, when the mobile agricultural machine is driven on the road or in a crowded area, such as when driving along a ridge, The switch 10 that detects the working state is automatically turned off, thereby reliably preventing the mobile agricultural machine from stopping unexpectedly.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a combine harvester to which the present invention is applied, Fig. 2 is a diagram showing the characteristics of a pyroelectric infrared sensor, Fig. 3 is a circuit diagram according to the invention, and Fig. 4 is a traveling clutch pedal section. FIG. 1... Mobile agricultural machine (combine harvester), 3... Aircraft,
7, 9...Pyroelectric infrared sensor, 10...Switch for detecting working status (grain culm detection switch),
20, 20s... Stop holding means (relay, relay switch), 21, 22... Solenoid, 23...
...Horn, 26...Travel clutch pedal, 26s
...Cancellation means (switch).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a mobile agricultural machine having a switch for detecting working conditions, a warning horn, and a travel clutch pedal, a pyroelectric infrared sensor is installed in front and/or after the mobile agricultural machine, and the sensor operates only while the switch detects the working condition,
A mobile device that is equipped with a holding means that reacts when a person is within a predetermined distance, stops the movement of the aircraft, and holds it in the stopped state, and is further provided with a release means that releases the holding means by pressing a travel clutch pedal. Agricultural machinery safety equipment. (2) The safety device according to claim 1, in which the mobile agricultural machine is a combine harvester equipped with an automatic control device.