JP2015040102A - Safety device of garbage truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device of a garbage truck which minimizes erroneous movement by stopping a garbage loading device when a person approaches the truck, or a scream, etc. is sensed during such a state that the movement of the garbage loading device of the garbage truck exerts a danger to a human body.SOLUTION: A safety device of a garbage truck includes: a proximity switch 11 actuated when a rotation plate 53 comes to a position of the beginning of a dangerous movement range on which an entrainment accident may occur, in a movable range of the rotation plate 53 of the garbage loading device 5; a timer which starts after the proximity switch 11 is actuated and stops after a predetermined time; an electromagnetic wave sensor 12 which is disposed on a garbage truck rear part near a garbage projection port 4 and can sense a human body; a voice switch which is disposed near the garbage projection port 4 and is actuated when sensing a sound of a predetermined sound volume; and a control unit 20 which performs emergency stop of the garbage loading device 5 when the electromagnetic wave sensor 12 or the voice switch is actuated during actuation time of the timer.

Description

  The present invention relates to a safety device for preventing personal accidents when collecting household garbage or business-related garbage with a garbage truck.

Generally, household garbage and business-related garbage are put in designated garbage bags and collected by a garbage truck on a designated date.
The garbage truck includes a dust container, a dust container that communicates with the rear opening of the dust container, and a dust container that is provided on the rear surface of the dust container.
The garbage bag thrown from the dust throwing opening is pushed into the dust storage box by the dust loading device provided in the dust throwing box.
There are roughly two types of dust loading devices: a rotating plate that rotates continuously in the dust throwing box, a rotating plate type that has a pushing plate that pushes dust scraped up by the rotating plate into the dust containing box, and a dust throwing device. There is a compression type that has an arm that moves up and down in the box and a press plate that is rotatably provided at the tip of the arm, and compresses dust with the press plate.

  In either type, the garbage bag thrown into the dust box from the dust inlet is crushed by the rotating plate or press plate, but the workers or residents who put the garbage bag directly into the garbage truck When a hand or a part of the human body is put into the bag through the dust inlet, it may be accidentally pulled into the rotating plate or press plate in the dust box, resulting in death or damage to the human body. Has occurred.

  In order to prevent such personal injury, Patent Document 1 is provided with a photoelectric safety device comprising a plurality of light projectors arranged linearly on the left and right of the dust inlet and a plurality of light receivers facing each light projector. In a safety device that prevents a personal injury by stopping the dust loading device in an emergency when a part of the human body or dust is cut off between the projector and the receiver, the lower the projector and the receiver, It is described that the safety is improved by disposing it so as to be separated from the input port so that the lower part having a higher risk probability can detect the body and the like earlier than the upper part.

  Further, Patent Document 2 is provided with a current collecting sensor that detects by infrared rays that an operator has approached the dust input port, and is a safety device that urgently stops the dust loading device when the current collecting sensor detects a human body. An apparatus is described.

  In Patent Document 3, an antenna that emits weak radio waves is provided in the vicinity of the left and right side edges of a dust inlet, a recognition tag is attached to an operator's arm, and the ID number of the recognition tag received by the antenna is If it is a registered ID number, a safety device that stops the operation of the dust loading device is described.

  In Patent Document 4, a transmitter that can be mounted near the tip of an operator's hand or foot, a receiver that is installed on the outer side surface of the side wall of a dust box of a garbage truck, and receives a signal from the transmitter; A drive control device that stops the dust loading device when the receiver stops receiving a signal of a certain intensity or more, and when the transmitter enters the driving range of the dust loading device, the transmitter is caused by the side wall of the dust loading box. A safety device is described in which the drive control device detects that the signal from the motor is attenuated and stops the operation of the dust loading device.

  In Patent Document 5, a sensor that detects a relative distance between a dust inlet and an operator, a stop device that makes an emergency stop of the scraping member, and the scraping member crossing the dust inlet in the direction of scraping. And a control device that activates the stop device when the relative distance detected by the sensor is equal to or less than a predetermined distance and deactivates the stop device otherwise. ing.

  Patent Document 6 includes an electromagnetic wave communication tag attached to a worker side and having an antenna part, and an antenna device that communicates with the electromagnetic wave communication tag when the electromagnetic wave communication tag enters the dangerous work area. A safety management system is described in which when the antenna device receives a signal from the electromagnetic wave communication tag, a signal is transmitted from an emergency stop circuit to stop the operation of the machine.

  Patent Document 7 discloses an approach detection device that detects that a part of an operator's body has entered a hazardous area in a dust box, a scraping member position detection unit that detects the position of the scratching member, and an approach. The detection device detects that a part of the worker's body has entered the dangerous area in the dust box, and the scraping member position detection unit detects that the scratching member is at a predetermined dangerous position. Sometimes, there is described a control device for a scraping device including a scraping member stop control unit that stops the scraping member.

Japanese Utility Model Publication No. 1-152905 Japanese Utility Model Publication No. 4-29505 JP 2005-67746 A (Patent No. 4344557) JP-A-2005-314059 (Patent No. 43699795) JP 2006-36466 A JP 2006-316862 A JP 2007-204276 A (Patent No. 4767709)

  However, the safety device described in Patent Document 1 is devised so that the lower projector and the light receiver are arranged so as to be separated from the dust inlet so as to distinguish and detect the worker and the dust. However, the garbage is not always put in only from the high part of the dust inlet, and the dust loading device often stops operation due to the dust thrown from the lower part, which is not practical. There is.

  The safety device described in Patent Document 2 is configured to detect the human body and dust by detecting infrared rays, but the dust may also emit infrared rays depending on the temperature. I can not say.

  Since the safety devices described in Patent Documents 3 to 7 are intended to detect the approach of the worker by attaching a recognition tag or transmitter to the worker, There is a problem that even if residents approach by mistake, they cannot be detected.

  Therefore, the present invention is to stop the dust loading device when a person approaches or senses a scream while the operation of the dust loading device of the garbage truck becomes dangerous to the human body. An object of the present invention is to provide a safety device for a garbage truck with reduced malfunction.

In order to solve the above problems, a safety device for a garbage truck according to the present invention includes a dust container, a dust container box connected to the rear opening of the dust container box, and a dust container provided on the rear surface of the dust container box. A safety device for a garbage truck provided with a dust loading device that is provided in the dust input box and that pushes the dust charged in the dust input port into the dust container box,
Proximity switch that operates when the movable part comes to the start position of the dangerous operation range where the entrainment accident may occur among the movable range of the movable part of the dust loading device,
A timer that starts after this proximity switch is activated and stops after a certain period of time;
A human body sensor that is provided at the rear of the garbage truck in the vicinity of the dust inlet and can sense a human body,
A voice switch that is provided in the vicinity of the dust inlet and that operates when a sound of a certain level or higher is detected;
A control unit for urgently stopping the dust loading device when a human body sensor switch is activated by a signal of the human body sensor during the operation time of the timer or when the voice switch is activated. is there.

  In the present invention, the timer switches the predetermined time after the proximity switch comes to the start position of the dangerous operation range where the entrainment accident may occur in the movable range of the movable part of the dust loading device. In addition, when the human body sensor detects the human body or when the voice switch is activated, the dust loading device is stopped immediately, so that there is little risk of entrainment accidents. The emergency stop of the garbage loading device is eliminated.

  Thereby, an unnecessary emergency stop can be prevented, and the operation of the stable dust loading device can be ensured while ensuring safety.

  The human body sensor can accurately detect a dangerous state in which an operator or a resident approaches the vicinity of the dust inlet by setting the vicinity of the foot of the human body standing in the vicinity of the dust inlet as a detection range.

  By using an electromagnetic wave sensor as the human body sensor, human body can be preferably detected.

  Operation of the garbage truck by installing a pilot lamp in the driver's seat indicating that the human body sensor switch and voice switch can be activated and a buzzer that sounds when the control unit generates an emergency stop signal for the garbage loading device Can be grasped at the driver's seat and necessary actions can be taken.

  According to the present invention, the dust loading device is stopped when a person approaches or senses a scream while the operation of the dust loading device of the garbage truck becomes dangerous to the human body. Thus, it is possible to obtain a safety device for a garbage truck with reduced malfunctions.

It is a partially cutaway side view of a refuse truck according to an embodiment of the present invention. It is a principal part perspective view of the garbage truck which concerns on embodiment of this invention. It is a block diagram of the safety device of the garbage truck which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
A garbage truck 1 according to the embodiment of the present invention shown in FIG. 1 and FIG. 2 shows a rotary plate type, and a dust container box 2 and a dust input box 3 communicating with a rear opening of the dust container box 2. A dust input port 4 provided on the rear surface of the dust input box 3 and a dust loading device 5 provided in the dust input box 2 for pushing the dust input into the dust input port 4 into the dust storage box 2 are provided. Yes.

In this example, the dust loading device 5 includes a pushing plate 52 that is reciprocally rotated by a cylinder 51 and a rotating plate 53 that is rotationally driven, and is thrown into the bottom of the dust throwing box 3 from the dust throwing port 4. The garbage bag is rotated halfway by the rotating plate 53 and stopped at the horizontal position, and the dust bag on the rotating plate 53 is pushed into the refuse storage box 2 by the pushing plate 52.
In the figure, 6 is a driver's seat, 7 is a controller for controlling the dust loading device 5 and the like, and 8 is a loading operation panel.

  In the present embodiment, the proximity switch 11 that operates when the rotating plate 53 comes to the beginning of the range in which the rotating plate 53 is caught and may cause an accident is provided. For example, an electromagnetic wave sensor 12 as a human body sensor is provided at a position behind the bumper, for example, below the bumper, and a sound collecting microphone 13 is provided at a position inside the back of the dust box 3.

  The electromagnetic wave sensor 12 is a sensor that operates when a human body approaches in the electromagnetic wave radiation range A (see FIG. 1).

FIG. 3 is a block diagram of a safety device that operates using the proximity switch 11, the electromagnetic wave sensor 12, and the sound collecting microphone 13 as input signals.
When the proximity switch 11 detects that the rotating plate 53 is approaching, the timer 14 is activated and outputs an operation signal to the relay circuit unit 22 in the control unit 20 for a certain time, for example, 3 seconds.
The electromagnetic wave sensor 12 receives an electromagnetic wave from the electromagnetic wave generator 15, detects that a human body is approaching, operates the electromagnetic wave sensor switch 21 in the control unit 20, and outputs an operation signal to the relay circuit unit 22.
The sound collecting microphone 13 is provided with a voice switch 16 in the control unit 20 that emits a signal at a predetermined volume or more so as to react with loud voices or screams, and is output to the relay circuit unit 22.

The safety device having the above configuration performs the following operation.
The proximity switch 11 is activated when the rotary plate 53 comes to the beginning of a dangerous range where the rotary plate 53 of the dust loading device 5 is caught and may cause an accident. To emit. In response to this output signal, the timer 14 operates and outputs an operation signal to the relay circuit unit 22.
The timer 14 operates for a set time, for example, 3 seconds, and turns on the input signal reception operation of the relay circuit unit 22 during operation.

  A signal generated when the electromagnetic sensor 12 is activated by a signal generated when the electromagnetic wave sensor 12 senses a person's movement by the operation of the timer 14, or a signal generated when the sound collecting microphone 13 senses a loud voice of a person. When the voice switch 16 is actuated, the relay circuit unit 22 outputs an emergency stop signal to the controller 7 to stop the rotary plate 53 of the dust loading device 5 in an emergency manner.

  When the rotating plate 53 of the dust loading device 5 is not rotating or when the rotating plate 53 is rotating downward with respect to the rotating shaft, there is no concern about the occurrence of an entrainment accident. By preventing the emergency stop signal from being generated by the signal from the sound collecting microphone 13, unnecessary operation stop can be eliminated.

  The pilot lamp 17 installed in the driver's seat of the garbage truck 1 indicates an operable state of the electromagnetic wave sensor switch 21 and the voice switch 16, and an emergency stop state is displayed by the buzzer 18 to promote a dangerous state avoidance operation. .

  In the above-described embodiment, an example in which the electromagnetic wave sensor 12 is used as a human body detection sensor has been described. However, any sensor other than the electromagnetic wave sensor 12 can be used as long as it can detect a human body.

  The dust loading device 5 has been described by taking a rotating plate type as an example, but can also be applied to a compression type dust loading device that compresses dust with a press plate.

  The present invention is to stop the dust loading device when a person approaches or screams while the operation of the dust loading device of the garbage truck becomes dangerous to the human body, It can be suitably used as a safety device for a garbage truck with fewer malfunctions.

DESCRIPTION OF SYMBOLS 1 Dust truck 2 Dust storage box 3 Dust input box 4 Dust input port 5 Dust loading device 51 Cylinder 52 Pushing plate 53 Rotating plate 6 Driver's seat 7 Controller 8 Loading operation panel 11 Proximity switch 12 Electromagnetic sensor 13 Sound collecting microphone 14 Timer DESCRIPTION OF SYMBOLS 15 Electromagnetic wave generator 16 Voice switch 17 Pilot lamp 18 Buzzer 20 Control unit 21 Electromagnetic wave sensor switch 22 Relay circuit part

Claims (5)

A dust storage box, a dust input box communicating with the rear opening of the dust storage box, a dust input port provided on the rear surface of the dust input box, a dust input box provided in the dust input box, and connected to the dust input port A garbage truck safety device provided with a dust loading device for pushing charged dust into the dust container,
Proximity switch that operates when the movable part comes to the start position of the dangerous operation range where the entrainment accident may occur among the movable range of the movable part of the dust loading device,
A timer that starts after this proximity switch is activated and stops after a certain period of time;
A human body sensor that is provided at the rear of the garbage truck in the vicinity of the dust inlet and can sense a human body,
A voice switch that is provided in the vicinity of the dust inlet and that operates when a sound of a certain level or higher is detected;
A garbage truck comprising a control unit for urgently stopping the garbage loading device when a human body sensor switch is activated by a signal of the human body sensor during an operation time of the timer or when the voice switch is activated Safety equipment.   The dust vehicle safety device according to claim 1, wherein the human body detection sensor has a detection range near a foot of a human body standing in the vicinity of the dust inlet.   3. The garbage truck safety device according to claim 1, wherein the human body sensor is an electromagnetic wave sensor.   The safety device for a garbage truck according to any one of claims 1 to 3, wherein a pilot lamp indicating an operable state of the human body sensor switch and the voice switch is installed in a driver's seat.   The safety device for a garbage truck according to any one of claims 1 to 4, wherein a buzzer that rings when the control unit generates an emergency stop signal of the garbage loading device is installed in a driver's seat.

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