JP2000001876A - Clash prevention device of muck loader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clash prevention device capable of notifying an operator of a dump truck of the approach to a conveyor in advance by a simple device to call the operator's attention with a simple device in the case the dump truck approaches the conveyor turned backward for loading excavated muck to the dump truck from the conveyor, reducing time required for approaching a specific position to promote loading work efficiency and being provided in a muck loader for preventing the dump truck from clashing against the conveyor. SOLUTION: A conveyor is loaded to a base 2 on a self-propelled crawler 1 in a tiltable manner, the base 2 is equipped with a boom bearing frame 19 capable of being revolved in the horizontal direction, two-throw booms 5 and 9 equipped with an excavating bucket 11 capable of being vertically revolved on the front end are arranged to the boom bearing frame 19, the rear boom 5 of two-throw booms 5 and 9 is separately provided in the horizontal direction in a revolvable manner, and the rear boom 5 is vertically provided in a revolvable manner. In that case, the conveyor is equipped with a dump truck sense microwave sensor 25 and a contact curtain switch 28, and warning buzzers are provided respectively to them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing collision of a shear loader used for excavation and loading of a shear, and in particular, a dump truck facing backward to load excavated waste from the conveyor to the dump truck. The present invention relates to an anti-collision device provided in a shear loader for preventing a dump truck from colliding with a conveyor device when approaching a vehicle.

[0002]

2. Description of the Related Art A conventional shear loader described in Japanese Patent Application Laid-Open No. 6-158682 has a base 2 provided on a self-propelled crawler as shown in FIG. The conveyer 3 is pivotally attached to the base 3 so as to be tiltable, and the boom support frame 19 can be horizontally turned on a boom open turning pin 18 which is vertically erected on the base 2 on one side of the front half of the conveyor 3. A boom open cylinder 21 rotatably mounted on the base 2 is rotatably mounted on the base projection 20 of the boom support frame 19. further,
A base boom 20 of the boom support frame 19 and a support bracket 22 that supports the boom 5 thereafter are connected by a boom left / right swing cylinder 24.

On the other hand, a support bracket 22 for supporting the rear boom 5 is attached to the end of the boom support frame 19 so as to be pivotable in the horizontal direction by a bucket pivot pin 23.
The rear boom 5 is swingable in the vertical direction by a cylinder with respect to the support bracket 22, and the front boom 9 is pivotally attached to the tip of the rear boom 5 by the cylinder 10 in the vertical direction. A bucket 11 is pivotally attached to the front end of the front boom 9, and the bucket 11 can be vertically swung by a cylinder 13 via a link 12. Therefore, in the above-mentioned shear loader, the excavation and scraping operation is performed by raising and lowering the excavation bucket 11 by a plurality of drive cylinders mounted on the booms 5 and 9.
The earth and sand excavated by the excavation bucket 11 is moved to the left and right, is scraped by the tip of the inclined conveyor 3, is transported rearward by the conveyor 3, and is conveyed by the conveyor 3.
It is placed behind and loaded on a dump truck for transporting earth and sand.

[0004]

However, the loader described in Japanese Patent Application Laid-Open No. 6-158682 does not allow the dump truck to move backward when the dump truck approaches the conveyor device in order to load the excavated waste. There was no safety device to prevent collision with the conveyor device, and it was time-consuming to approach the predetermined position due to the visual and sensation of the driver of the dump truck. Accidents.

Therefore, when a dump truck for loading excavated waste approaches the conveyor device backward, the driver of the dump truck is warned in advance with a simple device,
There has been a strong demand for a device capable of shortening the time required to approach a predetermined loading position to improve the loading work efficiency and preventing collision.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a simple device is used for loading the excavated waste from the conveyor device to the dump truck when the dump truck approaches the conveyor device backward. To inform the driver of the dump truck in advance that the vehicle has approached the vehicle and warn the driver to shorten the time required to approach the predetermined position to improve the loading work efficiency and to prevent the dump truck from colliding with the conveyor device. An object of the present invention is to provide a collision prevention device provided in a shear loader.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a boom which is mounted on a base on a self-propelled crawler so as to be tiltable, and which can be turned horizontally in the base. Equipped with a support frame, the boom support frame is provided with a boom provided with an excavating bucket capable of turning up and down at the tip thereof in a collision preventing device of a shear loader, wherein the conveyor device has an ultrasonic sensor for dump truck sensing. The alarm buzzer is provided.

In addition, a conveyor device is mounted on the base on the self-propelled crawler so as to be tiltable, and the base is equipped with a boom support frame that can be turned horizontally, and the boom support frame is turned up and down at the tip. Two booms with possible excavation buckets are arranged, and of the two booms, the rear boom is horizontally and independently rotatably disposed, and the rear boom is vertically rotatable. In the collision preventing device for a shear loader provided in the above, the conveyor device is provided with an ultrasonic sensor for dump truck detection and an alarm buzzer thereof.

Further, in each of the above-described collision preventing devices for a shear loader, the conveyor device is provided with a contact goodwill switch and an alarm buzzer, and an ultrasonic sensor for detecting a dump truck, a contact goodwill switch, and an alarm are provided. It is characterized in that a power supply such as a buzzer is turned on when the driving device of the shear loader is activated.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. A self-propelled crawler moves a shear loader to an excavation site and tilts a conveyor device on a base at a predetermined angle. Thereafter, the boom support frame, which is horizontally rotatable on one side of the base, is horizontally rotated by a boom open cylinder via a boom open rotation pin, and is positioned above the conveyor device on the base, and A double boom provided with a digging bucket at the tip is moved to a predetermined digging position by a boom left / right swing cylinder via a bucket pivot pin at the tip of the boom support frame.

In this way, the excavating bucket of the shear loader is moved to the excavating position, and then the excavating and scraping operation is started. This excavation and scraping operation is performed by moving the excavation bucket up and down, left and right by a plurality of drive cylinders mounted on a double boom. The excavated earth and sand is scraped by the excavating bucket to the tip of the inclined conveyor device, and is loaded by the conveyor device on the earth and sand transport truck arranged behind the conveyor device.

At this time, the dump truck for loading the excavated waste approaches the conveyor device backward, but the ultrasonic sensor for dump truck sensing provided in the conveyor device always outputs an ultrasonic beam from the head portion. When a dump truck or the like enters the set distance range, the ultrasonic beam bounces back, and the ultrasonic sensor detects it, activates an internal relay, outputs an output signal, and sounds an alarm buzzer with the output signal.

Accordingly, the driver of the dump truck is informed in advance that the vehicle has approached the conveyor device by the ultrasonic sensor for detecting the dump truck and the alarm buzzer, and the driver is alerted.
Improving the loading work efficiency by shortening the time required to approach the loading predetermined position, and if the dump truck is too close to the conveyor device, it contacts the contact goodwill switch and the stop alarm buzzer sounds to prevent collision. . In addition, the power supply such as the ultrasonic sensor for detecting the dump truck, the contact goodwill switch, and the alarm buzzer is turned on when the driving device of the loader is started. Switch.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a collision preventing device mounted on a shear loader according to the present invention. FIG. 1 is a side view of this embodiment, and FIG. 2 is a circuit diagram for an alarm device of this embodiment. In the drawing, the same or equivalent parts as those of the conventional shear loader described above are denoted by the same reference numerals, and detailed description thereof will be omitted. In the figure, a base 2 is provided on a self-propelled crawler 1 and a conveyor 3 is pivotally attached to the center of the base 2 so as to be tiltable. A boom support frame 19 is attached to a boom open pivot pin 18 erected on the boom so as to be pivotable in the horizontal direction.
A boom open cylinder 21 rotatably mounted on the base 2 is rotatably mounted on the base projecting piece 20 of FIG. On the other hand, a support bracket 22 for supporting the rear boom 5 is attached to the front end of the boom support frame 19 so as to be pivotable in the horizontal direction by a bucket pivot pin 23, and supports the base projecting piece 20 of the boom support frame 19 and the rear boom 5. Boom left and right swing cylinder 24
Are linked by

The rear boom 5 can swing vertically with respect to the support bracket 22 by the cylinder 8, and the front boom 9 can swing vertically with the cylinder 10 at the tip of the rear boom 5. Being pivoted. A bucket 11 is pivotally attached to the front end of the front boom 9,
Further, the bucket 11 can swing up and down by a cylinder 13 via a link 12.
Further, a cab 14, an engine drive hydraulic unit 15, a motor drive hydraulic unit 16, etc. are provided on the opposite base where the boom open pivot pin 18 is provided on the conveyor 3 pivotally attached to the base 2 so as to be tiltable. Is arranged.

The operation of the present embodiment will be described. The self-propelled crawler 1 moves the shear loader of the present embodiment to the excavation site, and then moves the conveyor device 3 on the base 2 to a predetermined angle by a cylinder (not shown). Tilt and arrange. Thereafter, a boom support frame 19, which is pivotally mounted on a boom open pivot pin 18 erected in the vertical direction on the base 2 on the side of the first half of the conveyor 3, is driven by a boom open cylinder 21 so that the boom support frame 19 is moved. The front end portion is turned horizontally to the center of the conveyor 3, and the boom left / right swing cylinder 24 is driven to rotate the support bracket 22 of the rear boom 5 via the bucket turning pin 23, and the booms 5 and 9 are rotated. The excavation bucket 11 at the tip is moved and arranged at a predetermined excavation position.

In this manner, the excavation bucket 11 of this embodiment is moved to the excavation position, and then the excavation scraping operation is started. This excavation and scraping operation is performed by moving the excavation bucket 11 up and down, left and right by a plurality of drive cylinders 8, 10, 13 and 24 mounted on the booms 5 and 9. Then, the earth and sand excavated by the excavation bucket 11 is scraped by the tip of the inclined conveyor 3, disposed behind and loaded on the earth and sand transport dump truck 17.

At this time, the dump truck 17 for loading the excavated waste approaches the conveyor device 3 backward, but the ultrasonic sensor 25 for dump truck sensing provided in the conveyor device 3 always receives ultrasonic waves from the head portion. When the dump truck 17 or the like enters the set distance range, the ultrasonic beam bounces back and is detected by the ultrasonic sensor 25, the internal relay operates, and the ultrasonic switch 26 is closed and output. A signal is issued, and the alarm buzzer 27 sounds with the output signal.

Therefore, the driver of the dump truck 17 is informed in advance of the approach to the conveyor device 3 by the dump truck detecting ultrasonic sensor 25 and the alarm buzzer 27 to warn the driver, and the time required to approach the predetermined loading position is shortened. If the dump truck 17 is too close to the conveyor 3 and the contact goodwill switch 2
When it comes into contact with 8, the goodwill switch limit switch 28A closes and the stop alarm buzzer 29 sounds to prevent collision.

In the circuit diagram for the alarm device shown in FIG.
The above-mentioned dump truck sensing ultrasonic sensor 25, ultrasonic switch 26, limit switch 28 for goodwill switch 28
A, a power source E such as the alarm buzzers 27 and 29 is turned on when the engine of the shear loader is started. On the other hand, when the power source E is turned on from a battery, the alarm switch 30 in the cab is used.

According to this embodiment, the excavated earth and sand is raked by the excavating bucket to the tip of the inclined conveyor device, and can be loaded on the dump truck for earth and sand transportation arranged behind the conveyor device by the conveyor device. When the dump truck for transporting earth and sand approaches the conveyor device backward for the loading, it is determined in advance that the dump truck has approached the conveyor device by an ultrasonic sensor for detecting a dump truck and an alarm buzzer provided in the conveyor device. Notifying the driver of the warning and prompting the driver to shorten the time to approach the predetermined loading position and improve the loading work efficiency, if the dump truck approaches the conveyor device too much, it will contact the contact goodwill switch and an alarm buzzer for stopping Sounds and collision can be prevented.

[0022]

According to the present invention described above, the excavated earth and sand is raked by the excavating bucket to the tip of the inclined conveyor device, and is loaded by the conveyor device on the earth and sand transport dump truck arranged behind the conveyor device. be able to. The dump truck for transporting earth and sand approaches the conveyor device backward for loading, but the operation of the dump truck is determined in advance by approaching the conveyor device by the dump truck sensing ultrasonic sensor and alarm buzzer provided on the conveyor device. Notifying the hand and prompting the attention to shorten the time to approach the predetermined loading position and improve the loading efficiency, and if the dump truck gets too close to the conveyor device, it will come in contact with the contact goodwill switch and the stop buzzer will sound. Ringing prevents collision.

[Brief description of the drawings]

FIG. 1 is a side view of the present embodiment.

FIG. 2 is an explanatory diagram of an alarm device circuit according to the present embodiment.

FIG. 3 is a plan view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-propelled crawler 2 Base 3 Conveyor 5 Rear boom 8 Cylinder 9 Front boom 10 Cylinder 11 Drilling bucket 12 Link 13 Cylinder 17 Gravel transport truck 18 Boom open swivel pin 19 Boom support frame 20 Base protrusion 21 Boom open cylinder 22 Support Bracket 23 Bucket pivot pin 24 Boom left / right swing cylinder 25 Ultrasonic sensor 26 Ultrasonic switch 27 Alarm buzzer 28 Contact goodwill switch 29 Stop alarm buzzer 30 Alarm switch

Continued on the front page (72) Inventor Osamu Togashi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside (72) Inventor Hidekazu Ito 2-28 Asahicho, Omuta-shi, Fukuoka Mitsui Miike Works, Ltd. Miike Office

Claims (4)

[Claims] 1. A conveyer device is mounted on a base on a self-propelled crawler so as to be tiltable, and a boom support frame capable of turning horizontally is provided on the base. An anti-collision device for a slip loader having a boom provided with a possible excavation bucket, wherein the conveyor device is provided with an ultrasonic sensor for dump truck detection and an alarm buzzer therefor. Anti-collision device. 2. A conveyer device is mounted on a base on a self-propelled crawler so as to be tiltable, and a boom support frame capable of turning in a horizontal direction is provided on the base. Two booms with possible excavation buckets are arranged, and of the two booms, the rear boom is horizontally and independently rotatably disposed, and the rear boom is vertically rotatable. A collision preventing device for a dump loader, wherein the conveyor device is provided with an ultrasonic sensor for dump truck detection and an alarm buzzer for the dump truck. 3. A collision preventing device for a shelving loader according to claim 1, wherein said conveyor device is provided with a contact goodwill switch and an alarm buzzer. . 4. The apparatus according to claim 1, wherein said driving means for driving the loader including a dump truck, an ultrasonic sensor for detecting a dump truck, a contact goodwill switch, and an alarm buzzer is turned on. The collision preventing device for a shear loader according to any one of the above.