JPS5818259B2 - Work equipment alarm device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an alarm system for working machines such as cultivators or tractors, which spatially detects the presence or absence of a driver at a predetermined location, and detects the presence or absence of a driver at a predetermined location and detects if the unmanned operation continues for a certain period of time or more. The system is designed to raise safety by issuing abnormality warnings.

In recent years, automation has been further promoted in the field of agricultural machinery such as cultivators and tractors, that is, working machines, and the present inventors have proposed and developed machines equipped with automatic steering devices and the like.

This reduces the driver's degree of concentration on bundle operation and dramatically improves the degree of freedom, and as a result, the driver's tasks other than bundle operation are increasing.

For example, when operating a tractor pulling a rotary rotary for cultivation in a field, in addition to operating the nodule while sitting in the driver's seat, you also need to check the cultivation status at the rear of the machine or adjust the cultivation depth. In other words, when operating the levers to move the tillage rotary up and down, the work is often done in awkward positions, such as facing backwards or half-sitting. It is expected that they will leave easily.

However, it is extremely dangerous for this unmanned operation to continue for a long period of time, and there is a risk of unexpected accidents such as the aircraft falling over or the driver himself being injured due to weak or undulating fields. However, these dangers can be fully avoided if the driver himself remains stationary on the aircraft body.

This invention was made based on the above-mentioned background, and uses a sensor to spatially detect the presence or absence of a driver at a predetermined position of a working machine. This invention attempts to contribute to improving safety by emitting an alarm based on the detection signal of the sensor described above to call attention to the situation.One embodiment of this invention will be described below in detail with reference to the drawings.

The drawings show, as an example, the case where the device of the present invention is applied to a tractor. In FIGS. 1 and 2, the front panel 2 in front of the driver's seat of the aircraft body 1 is equipped with various operating devices for operation, as well as the following. On the side, a detection sensor of the device of the present invention, that is, a photoelectric sensor 3 which is an integrated light-emitting element and a light-receiving element for detecting the presence or absence of a driver on the driver's seat is mounted diagonally toward the driver's seat 4. This photoelectric sensor 3 can be used not only when the driver is sitting in the driver's seat (Figure 2a), but also when the driver is standing on the aircraft 1 (Figure 2b) or in a half-sitting position. The light emitted from the light emitting element of the photoelectric sensor 3 is reflected by a part of the driver's body. The reflected light is also detected by the photoelectric sensor 3.
The light is received by the light receiving element.

FIG. 3 shows the circuit configuration of the alarm device according to the present invention. This circuit is mainly composed of an alarm control circuit 5 including a CPU, and the input side of this control circuit 50 has the above-mentioned driver detection circuit. The output signal from the photoelectric sensor 3 is inputted thereto, and the output side thereof has an actuator drive circuit 6 and an alarm drive circuit 7, and is further provided with a timer circuit 8.

Based on the output signal of the photoelectric sensor 3, the control circuit 5 determines whether or not the driver is located relative to the fixed position of the aircraft 1, and depending on the result, the alarm drive circuit 6 and the actuator 1 drive circuit are activated. Give a command signal to 7,
It drives a buzzer 9 and a lamp display device 10 provided on the front panel 2 to issue a visual/audible warning to the driver, and also cuts off power transmission from the electric motor via an actuator 13 such as a motor 11 or an electromagnetic lunoid 12. This configuration is configured to stop the traveling of the aircraft 1.

That is, if the driver leaves the machine for some reason while the tractor is running and the driver does not return within a certain period of time set by the timer circuit 8, in other words, the photoelectric sensor 30 reflects the presence of the driver for more than a certain period of time. If no output is obtained, a command signal is output from the control circuit 5 to the actuator drive circuit 6 and the alarm 1 drive circuit 7.

Then, the buzzer 9 and lamp display device 10 are operated via the alarm drive circuit 7 to issue a visual/audible alarm to the driver or other workers to call attention to the alarm, and at the same time, the alarm drive circuit 6 This drives the motor 11 or an actuator 13 such as an electromagnetic solenoid 12, thereby applying the brake and stopping power transmission from the prime mover, or stopping the prime mover itself.

In addition, as a concrete means to stop the above-mentioned prime mover, in the case of a diesel engine, the fuel valve is closed by the operation of the actuator as described above, and then the decompression lever is activated to stop the engine, and in the case of a gasoline engine, the engine is stopped. Usually, the main switch 14 provided on the front panel 2 is turned off to cut off the battery power supply, or the ignition coil is short-circuited to stop the engine.

Furthermore, in the above embodiment, a case has been described in which the traveling of the aircraft is stopped at the same time as the warning is issued, but in another embodiment, a confirmation switch 15 is attached to the front panel 2, and if the driver leaves the aircraft for a certain period of time or more, If there is, issue a warning with a buzzer or lamp display as above,
It is also possible to adopt a two-stage control system in which the machine stops traveling only when the confirmation switch is not pressed by the driver or other worker even after a certain period of time has elapsed.

As is clear from the above explanation, in the work equipment alarm system of the present invention, a sensor is installed on the machine body to spatially detect whether or not the driver is located at a predetermined position while the machine is running. In addition, based on the detection output of this sensor, if the driver is not at the above-mentioned predetermined position for a preset period of time or more, a buzzer or lamp will be displayed to that effect. The system is designed to issue an alarm to alert the driver or other workers, and is therefore used to alert the operator or other workers to a junction where the operator has left the aircraft for some reason and the machine has been running unattended for a certain period of time. Since the fact can be confirmed by the above-mentioned warning means, the accompanying danger can be avoided, and this greatly contributes to improving safety.

It should be noted that the present invention is of course applicable not only to the above-mentioned riding tractor but also to other rice transplanters, combines, etc.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an outline of a tractor equipped with a warning device of the present invention, FIG. 2 is an explanatory diagram showing the position of the driver in the driver's seat, and FIG. 3 is a diagram showing the circuit configuration of the warning device of the present invention. FIG. 1... Airframe, 3... Photoelectric sensor, 5... Alarm control circuit, 8... Timer circuit, 9... Buzzer, 1o
...Lamp display device.

Claims (1)

[Claims] 1. A sensor that spatially detects whether the driver is located at a predetermined position of the machine while the machine is running in a working machine such as a tractor or cultivator, and an alarm is issued based on the detection output of this sensor. An alarm device is attached to each part of the aircraft body, and the alarm device is configured to issue an alarm when the driver is not located at the predetermined position for a certain period of time based on the detection output of the sensor. Alarm device for work equipment.