JP2552979Y2 - Automatic dumper for dump trucks - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically erecting a body of a dump truck at a predetermined discharge place to discharge the body.

[0002]

2. Description of the Related Art A dump truck has a driver's cab mounted at the front of a vehicle body, and a body mounted at a rear portion of the vehicle body with a hoist cylinder so as to be able to stand up and down. It is known that a bar is operated to switch a control valve to supply pump discharge pressure oil to a hoist cylinder to raise and lower the body.

[0003]

In order to discharge soil and the like in the body to a predetermined discharging place such as a hopper of a fine stone plant or an aggregate plant by such a dump truck, the vehicle is driven backward and stopped at a predetermined position. Then, the control lever is operated to raise the body. Therefore, the operator needs to visually check the rear of the vehicle to determine the stop position and to operate the control lever, which is very troublesome. You may not be able to excavate.

Accordingly, an object of the present invention is to provide an automatic dump truck unloading apparatus capable of solving the above-mentioned problems.

[0005]

A dump truck position detecting means provided over a traveling path 10 and a dump truck 1 which are continuous with a predetermined discharging site 9 and a detection signal from the dump truck position detecting means are inputted. And a means for outputting a signal when the vehicle has traveled a predetermined distance and stopping the dump truck by a signal from the controller 22 and for raising the control valve 21 for supplying pressure oil to the hoist cylinder 6. Automatic truck unloading device.

[0006]

[Operation] When the dump truck 1 travels on the traveling path 10 and discharges the soil to the predetermined discharging position 9, the dump truck 1 is automatically stopped at the predetermined discharging position B and the body 4 is automatically stopped. Since the soil can be raised and discharged, it can be accurately discharged to the predetermined discharge place 9.

[0007]

[Embodiment] As shown in FIG. 1, a dump truck 1 is provided with a driver's cab 3 at a front portion of a vehicle body 2, and a body 4 is mounted on a rear portion thereof with a pin 5 so as to be able to stand upright and fall down. A hoist cylinder 6 is connected to the vehicle body 1, and a front steering wheel 7 and a rear driving wheel 8 are mounted on the vehicle body 1. On one side of a predetermined discharging site 9 such as a hopper, there is a traveling path 10, and on this traveling path 10, a support 12 having a reflector 11 is erected as shown in FIG. The photoelectric sensor 13 is mounted near the front of the vehicle body 2 as shown in FIGS. The photoelectric sensor 1
3 and the reflection plate 11, the dump truck 1 when both are reverse travel from the position A which matches the predetermined distance L ₁ is Yes and positioned so as to have a predetermined dumping position B to earth removal to a predetermined earth unloading location 9, The reflection plate 11 and the photoelectric sensor 13 serve as dump truck position detecting means. The photoelectric sensor 13
Alternatively, a laser emitting / receiving device or an ultrasonic emitting / receiving device may be used. As shown in FIG. 4, the pressure oil discharged from the pump 20 is supplied to the hoist cylinder 6 by a control valve 21. The control valve 21 receives a signal from a controller 22 and a control lever 23 to move the lower position C, the neutral position D, and the floating position. The position is switched to the position E and the raising position F. As shown in FIG. 4, the output of the engine 24 is
5. The transmission is transmitted to the driving rear wheel 8 via a transmission 26 and the like, and the transmission 26 is operated to advance, reverse, and shift by a shift signal from the controller 22 and the shift lever 27, and the shift signal and an output rotation sensor 28 Is output to the controller 22, and the brake 29 is braked by the brake pedal 30 and the brake valve 31 operated by a braking signal from the controller 22.

Next, the discharging operation will be described. As shown by the solid line in FIG. 2, the dump truck 1 is caused to travel backward toward a predetermined discharge place 9. When the photoelectric sensor 13 receives the light transmitted in accordance with the reflection plate 11, the controller 22 inputs that the dump truck 1 has reached the matching position A. Thus the controller 22 calculates the backward travel distance by the output shaft speed and the transmission signal, the neutral signal controller 22 to the transmission 26 when the reverse running distance reaches a predetermined distance L ₁ is set to the controller 22 At the same time, a dump signal is output to the brake valve 31 to brake the brake 29 to stop the dump truck 1 at the above-mentioned predetermined discharging position B. At the same time, the controller 22 outputs a signal to the control valve 21 to set it to the raising position E, and discharges the body 4 with the body 4 in a standing posture. When the body 4 has been in the standing posture for a predetermined time, the controller 22 outputs a buzzer or the like to be known to the operator, and the operator performs a normal traveling operation. The control valve 21
Can be switched by a signal from the controller 22 by controlling the amount of electricity supplied to the controller 22 using an electromagnetic proportional solenoid, or by using a plurality of double piston air cylinders and a plurality of solenoid valves. The electromagnetic valve may be switched by the controller 22 and switched by the air cylinder. The traveling of the dump truck 1 may be a manned traveling type or an unmanned traveling type.

[0009]

When the dump truck 1 travels on the traveling path 10 and discharges the soil to the predetermined discharging place 9, the dump truck 1 is automatically stopped at the predetermined discharging position B and the body 4 is automatically stopped. The soil can be discharged upright at the predetermined discharge place 9 because the soil can be discharged upright.

[Brief description of the drawings]

FIG. 1 is a front view of a dump truck.

FIG. 2 is a plan view of the dump truck.

FIG. 3 is a front view of the dump truck.

FIG. 4 is a control circuit diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Dump truck, 2 ... Body, 4 ... Body, 6 ... Hoist cylinder, 9 ... Predetermined earth removal place, 10 ... Running path, 11
... reflecting plate, 13 ... photoelectric sensor, 20 ... pump, 21 ... control valve, 22 ... controller.

Claims (1)

(57) [Scope of request for utility model registration] 1. A dump truck position detecting means provided over a traveling path 10 and a dump truck 1 continuous with a predetermined discharging site 9, and a predetermined distance after a detection signal is input from the dump truck position detecting means. A controller 22 that outputs a signal when the vehicle travels, and a means for stopping the dump truck in response to a signal from the controller 22 and a means for setting a control valve 21 for supplying pressurized oil to the hoist cylinder 6 to a raised position. Soil equipment.