JP2018127286A - Collision prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forklift collision prevention device capable of eliminating the necessity of laying a new power supply cord by arranging a human detection sensor which includes determination means, and notification means near or inside a light source housing storing a light source.SOLUTION: A forklift collision prevention device A has, arranged in a blue light housing 10, an ultrasonic sensor 2 which stores a blue light 1 designed to emit light by blue invisible light and causes a control unit 20 to determine whether there is a human around on the basis of a signal from a sensor body, and a speaker 3 which notifies an operator when the control unit 20 of the ultrasonic sensor 2 determines that there is a human by means of an alarm sound. As a power supply line laid for a blue lamp lighting during retraction includes the blue light 1 and can be used as a power source for the collision prevention device A, laying a new power supply cord is unnecessary.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a collision prevention device that can be easily attached to an existing forklift.

A technology has been disclosed in which an infrared sensor is attached to the outside of a vehicle body and the output unit notifies the user by flashing light when the signal processing circuit detects the presence of a person (Patent Document 1).
A risk prevention device such as a heavy construction machine in which an infrared type human presence sensor is attached to a vehicle body has been filed (Patent Document 2).
Furthermore, there is a technique for detecting a person with an infrared sensor (Patent Document 3).

Japanese Patent Laid-Open No. 9-328054 Japanese Patent Laid-Open No. 3-205296 Japanese Patent Application Laid-Open No. 2000-211453

  In Patent Document 1, it is necessary to connect the power supply line of the sensor device to a small lamp or the like with a power supply line. In addition, since the infrared sensor and the output unit are installed outside the vehicle body due to the structure of the automobile, the windshield is in the way and it is difficult to see the output unit from the driver's seat.

  In Patent Document 2, it is necessary to electrically connect a human detection sensor attached to a vehicle body or a boom to a notification means such as a buzzer or a lamp placed in a driver's seat using a connection wire.

  In Patent Document 3, it is necessary to electrically connect an infrared sensor provided outside the vehicle and a person determination unit and an alarm generation unit provided inside the vehicle with a connection wire.

  An object of the present invention is for a forklift that does not require new wiring of a power cord for power supply by arranging a human detection sensor including a determination unit and a notification unit in the vicinity of or inside a light source housing that houses a light source. To provide a collision prevention device.

(About claim 1)
In the collision prevention device, a human detection sensor and a notification unit are arranged in the vicinity or inside of a light source housing that houses a light source that emits a visible light of a predetermined color when energized to alert.

The human detection sensor includes a sensor main body and determination means for determining whether a person is present around the sensor main body based on a signal from the sensor main body.
When the human detection sensor detects the presence of a person in the surroundings, the notification means notifies the operator with an alarm or the like.

When installing a collision prevention device on a normal forklift that contains only the lamp in the lamp housing (with no collision prevention device installed) Method 1: Remove the lamp housing, house the light source, and place the human detection sensor and notification means inside the housing Replace the light source housing.
Technique 2: The lamp detection housing (= light source housing) is not removed, and the human detection sensor and the notification means are arranged in the vicinity thereof.

  Since the power source for operating the collision prevention device (human detection sensor, notification means) can use the existing power line wired to turn on the lamp, a new wiring of the power cord for power supply is required. It is unnecessary.

When installing an anti-collision device on a forklift that is equipped with a power supply line for turning on the revolving light or reverse light, etc. The light source housing with human detection sensor and notification means located in or near the housing To the option setting location. Note that a light source (a rotating lamp or a reverse lamp) is accommodated in the light source housing.
By using the power supply line wired for the option, no new wiring of the power cord for power supply is required.

Since the light source housing is installed at a position suitable for alerting the surrounding people, the human detection sensor arranged near or inside the light source housing has few blind spots.
The cockpit seat of a forklift is not sealed with a window glass or body frame, and is exposed to the outside. Therefore, when the notification means gives notification, the operator can easily grasp the notification contents. it can.
Since the light source, the human detection sensor, and the notification means do not interfere with each other, the human detection sensor and the notification means can be disposed in the vicinity of or inside the light source housing that houses the light source.

(About claim 2)
The human detection sensor is either an active infrared sensor, a passive infrared sensor, or a reflective ultrasonic sensor.
The active infrared sensor emits infrared rays of light flux from a projector, and receives infrared rays reflected by a human body and returned by a light receiver. The discriminating means discriminates whether or not there is a person around by the change in the amount of received light.

Passive infrared sensors sense infrared energy in the human body and background.
The discriminating unit discriminates whether or not a person exists around the forklift from the difference (temperature difference) between the infrared energy radiated from the human body surface and the background infrared energy detected by the sensor.

The reflection type ultrasonic sensor transmits an ultrasonic wave from a transmitter, receives a reflected wave by the receiver, and outputs the electromotive force corresponding to the received intensity.
The discriminating unit discriminates whether or not there is a person around the forklift based on the intensity, displacement, and fluctuation of the electromotive force.

(Claim 3)
A light source housing, which is a collision prevention device, is attached to an upper portion of a front column that is erected from the left and right of the front of the vehicle body. The headlamps housed in the light source housing are turned on when energized during cargo handling operations when the forklift is operating. This headlamp serves to alert a person on the front side of the forklift as well as to illuminate a dark place.

  In the forklift employing the collision prevention device according to claim 3, when the determining means determines that there is a person on the front side of the forklift (which is difficult to see from the driver's seat) during the cargo handling operation, Since the notification means arranged inside notifies the operator by an alarm or the like, a collision can be prevented and safety can be maintained.

(About claim 4)
A rear column that stands upright from the left and right of the rear of the vehicle body, a front column that stands up from the left and right of the front of the vehicle, and a light source to the rear frame of the rectangular frame-shaped head guard that has four corners fixed to the upper ends of these four columns A housing is attached.

When the forklift is retracted, the backward light stored in the light source housing emits visible light of a predetermined color when energized, and urges a person on the rear side of the forklift to be alerted.
In the forklift employing the collision prevention device according to claim 4, when it is determined that there is a person behind the forklift (which is difficult to see from the driver's seat), a notification means arranged near or inside the light source housing is provided. Since the operator is notified by an alarm or the like, a collision can be prevented and safety can be maintained.

  A light source housing on the upper surface of a rear column that stands from the left and right of the rear of the vehicle body, a front column that stands from the left and right of the front of the vehicle, and a rectangular frame-shaped head guard whose four corners are fixed to the upper ends of these four columns Is attached.

The revolving lamp housed in the light source housing is energized and turned on during cargo handling work of the forklift, and urges people around the forklift to be alerted.
In the forklift employing the collision prevention device according to claim 4, when the determining means determines that there is a person around the forklift during the cargo handling operation, the notifying means arranged in the vicinity of or inside the light source housing is alarmed. Since the operator is notified by the above, a collision can be prevented and safety can be maintained.

It is a perspective view of the forklift which attached the collision prevention apparatus A of Example 1. FIG. It is the circuit diagram (a) of the collision prevention apparatus A of Example 1, and explanatory drawing (b). It is explanatory drawing which shows the human sensitive determination area | region of the forklift which attached the collision prevention apparatus A of Example 1. FIG. It is a perspective view of the forklift which attached the collision prevention apparatus B of Example 2. FIG. It is explanatory drawing (a) of the collision prevention apparatus B of Example 2, and a circuit diagram (b). It is a perspective view of the forklift which attached the collision prevention apparatus C of Example 3. FIG. It is explanatory drawing (a) of the collision prevention apparatus C of Example 3, and a circuit diagram (b). It is explanatory drawing (a) of the collision prevention apparatus D of Example 3, and a circuit diagram (b).

1 to 3 show a first embodiment (corresponding to claims 1, 2, and 4) of the present invention.
As shown in FIG. 2, the forklift collision prevention apparatus A according to the first embodiment includes a blue light 1 that emits blue visible light in a blue light housing 10 and a person around it based on a signal from a sensor body. An ultrasonic sensor 2 for determining whether or not the control unit 20 is present, and a speaker 3 for notifying the operator with an alarm sound when the control unit 20 of the ultrasonic sensor 2 determines that a person is present. It is arranged.

The blue light housing 10 is a hollow box, and is formed of a light-shielding plastic that transmits only the front surface. Note that 11 is a transmission window, 12 is a reception window, and 13 is a blue light transmitting plate.
The blue light 1 for alerting includes an incandescent light bulb 14 that emits light when + 48V is supplied when the forklift 40 moves backward, a reflector 15 for directing light, a base 16 for screwing the incandescent light bulb 14, and a base And an insulating plate 17 for fixing 16.

  The reflection-type ultrasonic sensor 2 includes an ultrasonic transmission unit that radiates ultrasonic waves that exceed the human audible range into the air, and an ultrasonic reception unit that receives ultrasonic waves that are reflected back from an object. It comprises a wave section and a control section 20 (corresponding to a discriminating means) that performs control of the transmission / reception section and human detection. As shown in FIG. 3, the region where the ultrasonic sensor 2 can determine the human feeling is within a parabola of 2 m (maximum) × 5 m behind.

  The ultrasonic transmission unit includes a CMOS gate oscillation circuit that oscillates at a predetermined frequency, a speaker drive circuit that amplifies a pulse train generated by the oscillation circuit, and a 40 kHz ultrasonic wave that is disposed behind the conical directional horn. And an ultrasonic speaker 21 that emits directional radiation.

  The ultrasonic wave receiving unit includes an ultrasonic microphone 22 (corresponding to the sensor main body) disposed behind the conical directional horn, an amplification / detection circuit for amplifying and detecting the received signal, and triggering detection output. And a Schmitt trigger circuit.

  The control unit 20 includes a timer that controls the timing of ultrasonic emission and measurement, an alarm signal output circuit that outputs an alarm signal when the CPU described below detects the presence of a person, and operates the timer to reflect and return. It has a CPU that detects the head of the received ultrasonic wave and measures reflection time to determine human feeling, and an interface that connects the transmission / reception unit and the CPU.

  When an alarm signal is input from the alarm signal output circuit, the speaker 3 sounds an alarm sound to notify that there is a person around and alerts the operator.

  The anti-collision device A for the forklift 40, in which the blue light 1, the ultrasonic sensor 2, and the speaker 3 are housed in the blue light housing 10, includes rear columns 41, 42 standing from the left and right of the rear part of the vehicle body, At the center of the rear frame 46 of the front frame 43 and 44 standing upright from the left and right of the unit and the rectangular frame-shaped head guard 45 whose four corners are fixed to the upper ends of these four columns, it is attached diagonally downward with a mounting bracket. It has been.

The forklift without the anti-collision device to which this anti-collision device A is attached has a lamp housing that houses a blue lamp in the center of the rear frame of the head guard, and is designed to turn on the blue lamp when it moves backward. is there.
And after removing the lamp housing which accommodated the blue lamp, the blue light 1 is accommodated in the blue light housing 10, and the collision preventing apparatus A in which the ultrasonic sensor 2 and the speaker 3 are arranged is attached at the same position.

The anti-collision device A for forklifts according to the first embodiment has the following advantages.
Since the power supply line wired for the blue lamp that is turned on during the backward movement can be used as the power supply for the collision prevention apparatus A including the blue light 1, no new wiring of the power cord is required.

  Since the blue light housing 10 of the collision prevention apparatus A is installed at a position suitable for alerting the surrounding people (the same position as the removed lamp housing), the ultrasonic wave disposed inside the blue light housing 10 Sensor 2 has few blind spots.

  The cockpit seat of the forklift 40 is not sealed with a window glass or a body frame, and is exposed to the outside. Therefore, when an alarm sound is generated from the speaker 3 when a person is detected, the driver can easily The alarm sound can be recognized.

  The incandescent bulb 14 of the blue light 1 emits visible light, the reflective ultrasonic sensor 2 handles ultrasonic waves, and the alarm sound of the speaker 3 is audible, so it is placed inside the same blue light housing 10. Since they do not interfere with each other, malfunctions do not occur.

Since the ultrasonic speaker 21 and the ultrasonic microphone 22 are arranged at the back of the conical directional horn, the inside of the parabola 31 (refer to FIG. 3) of 2 m (maximum) × 5 m behind can be detected. It is an area.
For this reason, it is difficult for the ultrasonic sensor 2 to react to the horizontal wooden pallet 33, the diagonally rear wooden pallet 32, and the load placed on them.

4 and 5 show a second embodiment (corresponding to claims 1, 2, and 3) of the present invention.
As shown in FIG. 5, the forklift collision prevention apparatus B according to the second embodiment houses a headlight 51 that emits visible light when energized and a left-direction indicator light 52 inside a headlight housing 50, and includes a sensor. When the control unit 60 determines whether or not there is a person around based on a signal from the main body, and when the control unit 60 of the ultrasonic sensor 6 determines the presence of a person, an alarm sound is sent to the operator. A speaker 3 for performing notification is arranged.

  The headlight housing 50 is a hollow box, and is made of light-shielding plastic that transmits only the front surface. In addition, 61 is a transmission window, 62 is a receiving window, and 53 and 54 are translucent plates.

  The headlight 51 fixes an incandescent bulb 511 that emits light when +48 V is supplied during a forklift handling operation, a reflecting mirror 512 for directing light, a base 513 for screwing the incandescent bulb 511, a base 513, and the like. And an insulating plate 514.

  The left direction indicator light 52 includes an incandescent light bulb 521 that emits light when + 48V is supplied when the left turn of the forklift, a reflecting mirror 522 for directing light, and a base 523 for screwing the incandescent light bulb 521, and the base 523. Is fixed to the insulating plate 514.

  The reflection-type ultrasonic sensor 6 includes an ultrasonic transmission unit that radiates ultrasonic waves exceeding the human audible range into the air, and an ultrasonic reception unit that receives ultrasonic waves reflected back from an object. It comprises a wave section and a control section 60 (corresponding to a determination means) that controls the wave transmission / reception section and performs human judgment.

The ultrasonic transmission unit includes a CMOS gate oscillation circuit that oscillates at a predetermined frequency, a speaker drive circuit that amplifies a pulse train generated by the oscillation circuit, and an ultrasonic speaker 63 that radiates 100 kHz ultrasonic waves.
The frequency of the emitted ultrasonic wave is increased (the detection distance is slightly shortened), and the directional horn is eliminated to widen the beam width.

  The ultrasonic wave receiving unit includes an ultrasonic microphone 64 (which corresponds to the sensor main body) without a directional horn, an amplification / detection circuit for amplifying and detecting the received signal, and a Schmitt trigger circuit for triggering the detection output. Have.

  The controller 60 controls the timing of ultrasonic emission and measurement, an alarm signal output circuit that outputs an alarm signal when a CPU (to be described later) detects the presence of a person, operates the timer, reflects and returns. It has a CPU that detects the head of the received ultrasonic wave and measures reflection time to determine human feeling, and an interface that connects the transmission / reception unit and the CPU.

  The forklift without the anti-collision device to which the anti-collision device B is attached has a specification in which the headlamp is accommodated in the lamp housing and the headlamp is lit during the handling operation. The lamp housing is attached to the upper part of the front support columns 43 and 44 that are erected from the left and right of the front part of the vehicle body.

And after removing the lamp housing which accommodated the headlamp, the collision prevention apparatus B is attached to the same position.
The anti-collision device B is configured by arranging the ultrasonic sensor 6 inside the headlight housing 50 in which the headlight 51 and the left direction indicating light 52 are housed.

The anti-collision device B for forklifts according to the second embodiment has the following advantages.
Since the power line wired for the headlamp that is turned on during the cargo handling operation can be used as the power source of the collision prevention apparatus B including the headlight 51, a new wiring of the power cord is not necessary.

  Since the headlight housing 50 of the anti-collision device B is installed at a position suitable for alerting the surrounding people (the same position as the removed lamp housing), the ultrasonic sensor disposed in the headlight housing 50 6 has few blind spots.

  The cockpit seat of a forklift is not sealed with window glass or a body frame, and is exposed to the outside. Therefore, if an alarm sounds from the speaker 3 when a person is detected, the driver can easily alarm. Sound can be recognized.

  The incandescent bulb 511 of the headlight 61 emits visible light, the reflective ultrasonic sensor 6 handles ultrasonic waves, and the alarm sound of the speaker 3 is audible, so even if it is installed inside the headlight housing 50. They do not interfere with each other and do not malfunction.

The frequency of the emitted ultrasonic wave is increased (the detection distance is slightly shortened), and the directional horn is eliminated to widen the beam width.
Since the frequency of the ultrasonic wave radiated from the ultrasonic speaker 63 is increased and the directional horn is not used, it is possible to determine human feeling at a wide detection angle with a short detection distance with respect to the forward direction.

For this reason, it is possible to perform human detection in a wide range in front of the forklift 40 only by attaching the collision preventing device B to the upper part of the front support column 43 standing from the left side of the front of the vehicle body.
In addition, the collision preventing apparatus B may be attached to the upper part of the front support column 44 erected from the right side of the front part of the vehicle body, and human detection can be performed in a wider area in front of the forklift 40.

  When the forklift 40 with the anti-collision device B attached is in front of the forklift 40 during cargo handling work (it is difficult to see from the driver's seat when a load is loaded on the fork), the control unit 60 When the determination is made, the operator is notified by the alarm sound of the speaker 3 disposed inside the headlight housing 50, so that a collision can be prevented and safety can be maintained.

6 to 8 show a third embodiment (corresponding to claims 1, 2, 3 and 5) of the present invention.
The anti-collision devices C and D for forklifts according to the third embodiment are those in which the headlight housing 70 is attached to the top of the front column 43 of the forklift 40 and the rotary lamp housing 90 is attached to the upper surface of the head guard 45. It is.

  Inside the headlight housing 70 are housed a headlight LED 71 that emits light when energized and a left direction LED 72, and the control unit 81 determines whether or not there is a person around based on a signal from the sensor body. An infrared sensor 8 and a speaker 3 for notifying the operator with an alarm sound when the control unit 80 of the infrared sensor 8 detects the presence of a person are arranged. The infrared sensor 8 is disposed in an extending portion 73 provided at the lower rear of the headlight housing 70 where the light of the headlight LED 71 and the left direction instruction LED 72 is not directly applied.

  A rotating lamp LED 91 that emits light when energized is housed inside the rotating lamp housing 90, and an ultrasonic sensor 93 that determines whether or not there is a person around based on a signal from the sensor body, A speaker 3 is provided to notify the operator with an alarm sound when the control unit 92 of the ultrasonic sensor 93 detects the presence of a person.

The headlight housing 70 is a hollow box, and is formed of a light-shielding plastic whose front surface is transparent.
The headlight LED 71 is composed of a group of LEDs 711 that emit light during a cargo handling operation of a forklift, a reflecting mirror 712 for directing light, and an insulating plate 713 for fixing the reflecting mirror 712.

  The left direction indicating LED 72 includes a group of LEDs 721 that emit light when the forklift 40 is turned to the left and a reflecting mirror 722 for directing light, and the reflecting mirror 722 is fixed to the insulating plate 713.

  The active infrared sensor 8 includes a projector that emits infrared rays 81 of a luminous flux, a receiver that receives infrared rays 82 reflected by the human body and the like, and whether there is a person around because of a change in the amount of received light. And a control unit 80 for determining whether or not.

  The projector includes an infrared LED 83 that emits infrared light having a wavelength λ = 950 nm, a drive circuit that drives the infrared LED with a pulse modulation signal, and a condenser lens that directs infrared light 81 emitted from the infrared LED 83.

  The light receiver includes a condensing lens that collects the reflected infrared light 82, a photodiode 84 that outputs an electric signal corresponding to the amount of received light, an amplifier circuit that amplifies the electric signal, a bandpass filter, and a demodulator. A circuit, an integration circuit, and a comparison circuit;

In the control unit 80, the output of the comparison circuit is analyzed by the micro computer, and it is determined whether or not there is a person around.
When the control unit 80 of the infrared sensor 8 determines the presence of a person, the speaker 3 notifies the operator with an alarm sound.

  The ultrasonic sensor 93 is a reflection type, and an ultrasonic transmission unit for radiating ultrasonic waves exceeding the human audible range into the air, and an ultrasonic wave for receiving the ultrasonic waves reflected back to the object. It comprises a sound wave receiving section and a control section 92 (corresponding to a determination means) that controls the transmission / reception section and performs human judgment.

The ultrasonic transmission unit includes a CMOS gate oscillation circuit that oscillates at a predetermined frequency, a speaker drive circuit that amplifies a pulse train generated by the oscillation circuit, and an ultrasonic speaker 94 that emits 100 kHz ultrasonic waves.
The frequency of the emitted ultrasonic wave is increased (the detection distance is slightly shortened), and the directional horn is eliminated to widen the beam width.

  The ultrasonic wave reception unit includes an ultrasonic microphone 95 (corresponding to the sensor main body) without a directional horn, an amplification / detection circuit for amplifying and detecting the received signal, and a Schmitt trigger circuit for triggering the detection output. Have.

  The control unit 92 includes a timer that controls the timing of emission and measurement of ultrasonic waves, an alarm signal output circuit that outputs an alarm signal when the CPU described below detects the presence of a person, and operates the timer and reflects and returns. It has a CPU that detects the head of the received ultrasonic wave and measures reflection time to determine human feeling, and an interface that connects the transmission / reception unit and the CPU.

  The forklift for attaching the collision prevention devices C and D has a lamp housing (containing a headlamp that is lit during cargo handling work) attached to the upper part of the front columns 43 and 44 that are erected from the left and right of the front of the vehicle body, and A rotating lamp can be optionally mounted on the upper surface of the head guard 45.

And after removing the lamp housing which accommodated the headlamp, the headlight LED 71 and the left direction LED 72 are accommodated in the headlight housing 70, and the collision prevention device C in which the infrared sensor 8 is disposed is located at the same position. Attach to.
A rotating lamp housing 90 is attached to the right rear side of the upper surface of the head guard 45.

The anti-collision devices C and D for forklifts of Example 3 have the following advantages.
A power line wired for a headlamp that is turned on during cargo handling work can be used as a power source for the collision prevention apparatus C including the headlight 71, and is also wired for an optional rotating lamp. Can be used as a power source for the collision prevention device D including the rotating lamp LED 91, so that no new wiring of the power cord is required.

  Since the anti-collision devices C and D are installed at positions suitable for alerting the surrounding people, the infrared sensor 8 and the ultrasonic sensor 93 disposed inside the headlight housing 70 and the rotating light housing 90 are provided. There are few blind spots.

  The cockpit seat of a forklift is not sealed with window glass or a body frame, and is exposed to the outside. Therefore, if an alarm sounds from the speaker 3 when a person is detected, the driver can easily alarm. Sound can be recognized.

  The light emitted from the headlight LED 71 and the left direction instruction LED 72 is monochromatic visible light, the infrared sensor 8 handles infrared light, and the alarm sound of the speaker 3 is audible sound. Further, the infrared sensor 8 is disposed inside an extending portion 73 provided at the lower rear of the headlight housing 70, and is configured such that the light from the headlight LED 71 and the left direction indicating LED 72 is not directly applied thereto.

  For this reason, even if the headlight LED 71 and the left direction indicating LED 72 are housed in the same headlight housing 70 and the infrared sensor 8 and the speaker 3 are disposed, they do not interfere with each other, so malfunctions are unlikely to occur.

  Further, the light emitted from the rotating lamp LED 91 is visible light of a single color, the reflection type ultrasonic sensor 93 handles the ultrasonic wave, and the alarm sound of the speaker 3 is an audible sound. Even if they do not interfere with each other, no malfunction occurs.

  When it is determined that a person is present on the front side of the forklift 40, the forklift 40 to which the anti-collision devices C and D are attached informs the driver by an alarm sound of the speaker 3 disposed inside the headlight housing 70. When a notification is given and it is determined that there is a person on the rear side, a warning is given to the operator with the alarm sound of the speaker 3 arranged inside the rotating lamp housing 90, so that a collision is prevented in advance. And safe.

The present invention includes the following embodiments in addition to the above embodiments.
a. Specification that the volume of the alarm increases as the distance to the detected person gets closer, specification that the interval between alarms becomes shorter as the distance to the detected person gets closer, Specification that the alarm frequency becomes higher as the distance to the detected person gets closer It may be.

b. The infrared sensor may be a current collecting passive type.
c. For the notification, in addition to the alarm, a warning character may be displayed on the display.
d. In the case of being arranged in the vicinity of the light source housing, a structure in which the device housing incorporating the human detection sensor and the notification means of the collision prevention device is fixed to the light source housing integrally with a fixing band or the like is preferable.

A, B, C Anti-collision device for forklift
1 Blue light (light source)
2,93 Ultrasonic sensor (human detection sensor)
3 Speaker (notification means)
6, 8 Infrared sensor (human detection sensor)
10 Blue light housing (light source housing)
14 Incandescent bulb (light source)
20, 60, 80, 92 Control unit (discriminating means)
22, 95 Ultrasonic microphone (sensor body)
41, 42 Rear strut
43, 44 Front strut
45 Headgar
46 Rear frame
50, 70 Headlight housing (light source housing)
51 Headlight (light source)
71 Headlight LED (light source)
90 Rotating lamp housing (light source housing)
91 Revolving light LED (light source)

Claims (5)

In the vicinity of or inside the light source housing that houses a light source that emits light with a predetermined color when energized to alert
A human detection sensor for determining whether or not there is a person around based on a signal from the sensor body,
An anti-collision device for a forklift comprising a notification means for notifying the operator with an alarm or the like when the human detection sensor detects the presence of a person.   The collision accident prevention apparatus according to claim 1, wherein the human detection sensor is one of an active infrared sensor, a passive infrared sensor, and a reflective ultrasonic sensor. The light source is a headlamp that is turned on during cargo handling work,
The collision accident prevention device according to claim 1 or 2, wherein the device attachment position to the forklift is an upper portion of a front support column erected from the left and right of the front portion of the vehicle body. The light source is a retreat light that is turned on when retreating,
The device mounting position on the forklift is
A rear column that stands upright from the left and right of the rear of the vehicle body, a front column that stands up from the left and right of the front of the vehicle, and a rear frame of a rectangular frame-shaped head guard whose four corners are fixed to the upper ends of these four columns The collision accident prevention apparatus according to claim 1 or 2, characterized by the above. The light source is a rotating lamp that is turned on during cargo handling work,
The device mounting position on the forklift is
It is a rear column that stands upright from the left and right of the rear of the vehicle body, a front column that stands up from the left and right of the front of the vehicle, and the upper surface of a rectangular frame-shaped head guard that has four corners fixed to the upper ends of these four columns The collision accident prevention apparatus according to claim 1 or 2, characterized in that.