WO1994005981A1

WO1994005981A1 - Vehicle-loaded weight displaying device for dump truck

Info

Publication number: WO1994005981A1
Application number: PCT/JP1993/001252
Authority: WO
Inventors: Takao Nagai; Naotaka Ikura
Original assignee: Kabushiki Kaisha Komatsu Seisakusho
Priority date: 1992-09-04
Filing date: 1993-09-03
Publication date: 1994-03-17
Also published as: AU4982593A; JPH0682295A; AU675079B2

Abstract

A vehicle-loaded weight displaying device for a dump truck (A) comprising a controller (9) for calculating a vehicle-loaded weight from an internal pressure of a suspension cylinder (18), a transmitter (10) for transmitting a vehicle-loaded weight signal on receiving a signal from said controller, a receiver (16) for receiving said vehicle-loaded weight signal and a displaying portion (17) for displaying a vehicle-loaded weight on receiving a signal from said receiver, said controller and said transmitter being provided on a dump truck (A), while said receiver and said displaying portion on an excavating and loading machine (B). A vehicle-loaded weight displaying device for a dump truck (A) comprising a controller (9) for calculating a vehicle-loaded weight from an internal pressure of a suspension cylinder (18) and an arm-type displaying portion (40) adapted to protrude side-ways from the side of the vehicle body when a signal from said controller indicates that a vehicle-loaded weight exceeds a predetermined value, said controller and said arm-type display portion being provided on a dump truck (A).

Description

Specification

Dump truck body weight display

Technical field

TECHNICAL FIELD The present invention relates to a display apparatus for displaying the weight loaded in a body of a dump truck.

Background art

The dump truck has a driver's cab mounted at the front of the vehicle body and a body mounted on the rear of the vehicle body so that it can be raised and lowered, and is installed inside the body by a digging loader such as a power shovel or wheel loader at a civil engineering work site. It is loaded with earth and sand, travels to a predetermined location, and is discharged. In such a dump truck, an in-body loading weight display device has been proposed which informs an excavating loader operator of the in-body loading weight when the excavator loads the earth and sand.

For example, as shown in Japanese Patent Application Publication No. 2005-538, 1990, the weight loaded in the body is calculated from the internal pressure of the suspension cylinder supporting the wheels, and the calculated weight loaded in the body is a predetermined value. When the above conditions are met, the indicator lamp mounted on the side of the vehicle body is made to blink, so that the operator of the excavator can know that the weight loaded in the body has exceeded the specified value by looking at the indicator lamp. The following equipment has been proposed.

However, in such a body loading weight display device, a display lamp is attached to the side of the vehicle body, so that when loading earth and sand from the side of the dump truck, the operator of the excavator can visually see the display lamp. When loading earth and sand from behind the dump truck, the operator cannot see the display lamp.

The present invention provides a dump truck body load weight display that enables an operator of a digging loader behind a dump truck to know the load weight in the body or that the weight has exceeded a predetermined value. It is intended to provide a device. Disclosure of the invention

In order to achieve the above and other objects, as one embodiment of the present invention,

The dump truck is provided with a controller that calculates the weight loaded in the body from the internal pressure of the suspension cylinder, and a transmitter that transmits a weight signal loaded in the body based on a signal from the controller.

A body loading weight display for a dump truck, comprising: an excavator, a receiver for receiving the body weight signal, and a display unit for displaying the body weight by a signal from the receiver. Equipment provided

According to this configuration, the operator of the excavator can know the weight loaded in the body by directly looking at the display unit. You can know the loading weight. .

Preferably, when the calculated weight in the body is equal to or greater than a first predetermined value, data is transferred to the transmitter.

Also, preferably, the first predetermined value is equal to or less than a rated loading amount. Also, preferably, the display unit has a second predetermined weight in the body. There will be a warning light that will light when it exceeds the value.

Further, preferably, the second predetermined value is not less than a rated loading amount.

In another aspect of the present invention,

A controller that calculates the load weight in the body of the dump truck from the internal pressure of the suspension cylinder, and a side from the side of the body when the load weight in the body exceeds the first predetermined value by a signal from the controller. Provided is a body weight display device for a dump truck, which is provided with an arm-type display portion protruding toward the body.

According to this configuration, when the weight loaded in the body is equal to or more than the first predetermined value, the arm-type display portion protrudes laterally from the side surface of the body. The operator can know that the weight loaded in the body has exceeded the first predetermined value. Preferably, the first predetermined value is equal to or less than a rated loading amount.

Preferably, a lamp is provided on the arm-type display unit, the lamp being turned on when the display unit projects to the side of the vehicle body.

Further, preferably, the arm-type display unit is rotatably mounted on a side surface of a cab between a vertical position and a horizontal position, and protrudes laterally from the side surface of the body when the horizontal position is set. . BRIEF DESCRIPTION OF THE FIGURES

The present invention will be better understood from the following detailed description and the accompanying drawings, which illustrate embodiments of the invention. The embodiments shown in the accompanying drawings are not intended to specify the present invention, but merely to facilitate explanation and understanding. In the figure,

FIG. 1 is a side view of a dump truck equipped with a first embodiment of a body weight display device for a dump truck according to the present invention and a digging loader.

FIG. 2 is a perspective view around the controller of the first embodiment. FIG. 3 is a front view of the display unit of the embodiment.

FIG. 4 is a flowchart from the calculation of the load weight in the body to the transmission of the load weight signal in the body in the above embodiment.

FIG. 5 is a flowchart from the reception of the weight signal in the body to the display in the above embodiment.

FIG. 6 is a side view of a dump truck equipped with the second embodiment of the present invention.

FIG. 7 is a rear view of the dump truck of FIG.

FIG. 8 is a rear view of the mounting portion of the arm type display unit of the above embodiment. FIG. 9 is a plan view of a mounting portion of the arm type display unit in FIG.

It is operation | movement explanatory drawing. BEST MODE FOR CARRYING OUT THE INVENTION

First, a first embodiment will be described.

As shown in FIG. 1, the front wheel 2 and the rear wheel 3 are mounted on the body 1 of the dump truck A via a suspension (not shown), and a driver's cab 4 is mounted on the front of the body 1. A body 5 is mounted on the rear part of the body so as to be vertically rotatable, and the body 5 can be vertically rotated by a hoist cylinder 6 between a standing posture and a falling posture.

In the cab 4, there is a controller 9 for calculating the weight loaded in the body. And a transmitter 10 for transmitting, based on a signal from the controller 9, a weight signal in the body calculated by the controller 9. A display lamp 8 for selectively emitting one of a plurality of lamps in response to a signal from the controller 9 is attached to a front side surface of the vehicle body 1, for example, a boarding board 7 for boarding. Have been.

As shown in FIG. 2, the input side of the controller 9 includes four pressure sensors 19 for detecting the internal pressure of the front, rear, left and right suspension cylinders 18, a transmission transmission shift lever 22, A body float detection switch 23 and an inclinometer 24 are connected respectively, and a transmitter 10 and two left and right display lamps 8 are connected to the output side via a lamp drive relay 20. ing. The battery 21 is connected as a power source.

When the controller 9 receives the internal pressures of the front, rear, left, and right suspension cylinders 18 detected by the pressure sensor 19, the controller calculates the weight loaded in the body from the values, and calculates the weight loaded in the body. The display lamp 8 is turned on via the lamp drive relay 20 according to the amount, and a signal is sent to the transmitter 10 to generate a body load signal.

The excavator / loader B is, for example, a power shovel composed of a lower traveling unit 11, an upper revolving unit 12, an operator's cab 13, a work machine 15 including a bucket 14, and the like. The receiver 13 is provided with a receiver 16 for receiving the weight signal in the body, and a display unit 17 for displaying the weight signal in the body according to the signal from the receiver 16.

For example, as shown in FIG. 3, the display unit 17 includes a digital display unit 30, a calibration button 31, a night light dimming switch 32, and a clock setup unit. Just switch 33, Clock adjust shift switch 34, Clock adjust display increase switch 35, Stored data clear switch 36, Print feed switch 37, Print switch Switch 38 and recording paper exit 39.

Next, the calculation and transmission operation of the weight loaded in the body of the dump truck A will be described with reference to the flowchart of FIG. As a condition for starting the calculation of the weight loaded in the body, the body float detection switch 23 is ON (the body 5 is in the lying state) and the output of the inclinometer 24 is equal to or less than the predetermined value ( (The body 1 is almost horizontal.)

In step 100, the controller 9 executes the logic for calculating the weight loaded in the body based on the internal pressure of the suspension cylinder 18.

In step 101, it is determined whether or not a neutral signal is input from the transmission shift lever 22.If the neutral signal is not input in step 101, the process proceeds to step 104. Judge whether the transmitter line is open or not.If it is not open, return to step 100.If open, request the transmitter line disconnection in step 105 and disconnect the line. 0 Return to 0.

When a neutral signal is input from the transmission shift lever 22 in step 100, the process proceeds to step 102 and the difference between the loaded weight and the empty weight, that is, the loaded weight in the body is, for example, 5 tons. It is determined whether or not the weight is larger than the first predetermined value. If the difference between the loaded weight and the empty weight is less than 5 tons, the process returns to step 100. The first predetermined value may be an appropriate value within the rated loading capacity. If the difference between the weight of the loaded car and the weight of the empty car is larger than 5 tons, the data is transferred to the transmitter 10 in step 103. Further, proceeding from step 103 to step 106 to determine whether or not the line is open, and if not, connect the line at step 107 and connect to the weight loaded in the body at step 108. The signal is started, and if it is open, the load weight signal in the body is transmitted directly in step 108.

Next, the receiving of the weight signal in the body and the display of the weight in the body in the excavator B will be described with reference to the flowchart of FIG. 5. If the line is open in step 200, step 201 In step 202, the display operation is performed on the digital display unit 30 of the display unit 17, and then in step 203, the weight loaded in the body is, for example, 1 2 of the rated loading weight. It is checked whether it is 0% (second predetermined value) or more. If YES, proceed to step 204 to turn on the warning lamp. If Ν0, return to step 200. The second predetermined value may be an appropriate value that is equal to or larger than the rated loading amount.

If the line is not open in step 200, proceed to step 205 to display the clock on the digital display section 30 of the display section 17, and proceed to step 206 to turn off the warning light. And return to step 200.

Therefore, according to the present embodiment, since the operator of the excavator 直接 can directly know the weight loaded in the body by directly looking at the display portion 17, even if the excavator is loaded from the back of the dump truck Α, The operator of the loader Β can know the load weight in the body.

Next, a second embodiment will be described. Calculate the weight loaded in the body The configuration of the controller 9 is the same as described above.

As shown in FIGS. 6 and 7, the left and right side surfaces 4 a and 4 b of the cab 4 are located inside the left and right side surfaces 5 a and 5 b of the body 5 and are viewed from behind and the left and right side surfaces 4 a of the cab 4. , 4b are blocked by the body 5 and cannot be seen.

Therefore, in the present embodiment, left and right arm-type display portions 40 are supported on the left and right side surfaces 4 a and 4 b of the cab 4 so as to be rotatable up and down between a horizontal posture and a vertical posture. When the arm-type display unit 40 is in the horizontal position, the indicator lamp 41 provided on the arm-type display unit 40 projects laterally from the left and right side surfaces 5a and 5b of the body 5, and from behind the dump truck A. It is made visible.

As shown in FIG. 8 and FIG. 9, an upper bracket 42 and a lower bracket 43 are provided on the side surface 4a of the cab 4, and a pair of arm-type display units are provided on the front and rear surfaces of the upper bracket 42. 40 is rotatably supported by pins 44, and a servo cylinder 45 is connected between each arm type display section 40 and the lower bracket 43.

The servo cylinder 45 normally extends to set the arm type display section 40 in a vertical position, and the signal from the controller 9, that is, the signal indicating that the weight loaded in the body has become equal to or more than the first predetermined value, is the same as the conventional servo cylinder 45. Similar display lamp Reduces by the lighting current and rotates the arm type display unit 40 to the horizontal posture. Then, the lamp 41 is turned on when the arm-type display section 40 rotates in a horizontal posture.

Therefore, according to the present embodiment, since the arm-type display section 40 protrudes laterally from the side surface 5a of the vessel 5, the operator of the excavator B when loading from the rear of the dump truck A is inevitable. Load weight in ssel Is greater than or equal to the first predetermined value.

Although the present invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various modifications, omissions, and additions can be made to the disclosed embodiments without departing from the spirit and scope of the present invention. It is obvious in. Therefore, the present invention is not limited to the above-described embodiments, but should be understood to include the scope defined by the elements described in the claims and the equivalents thereof. Industrial applicability

INDUSTRIAL APPLICABILITY As described above, the device for displaying the weight loaded in the body of a dump truck according to the present invention is extremely useful as a device attached to a dump truck for construction work or ore transportation and a digging loader.

Claims

The scope of the claims

1. The dump truck is provided with a controller that calculates the weight loaded in the body from the internal pressure of the suspension cylinder, and a transmitter that transmits a weight signal loaded in the body by a signal from the controller. A body loading weight display for a dump truck, comprising: an excavator, a receiver for receiving the body weight signal, and a display unit for displaying the body weight by a signal from the receiver. apparatus.

2. The display of the weight loaded in the body of the dump truck according to claim 1, wherein the data is transferred to the transmitter when the calculated weight loaded in the body is equal to or more than the first predetermined value. apparatus.

3. The device according to claim 2, wherein the first predetermined value is equal to or less than a rated loading amount.

4. The display of the weight loaded in the body of the dump truck according to claim 1, wherein a warning light is provided on the display unit when the weight loaded in the body is equal to or more than a second predetermined value. apparatus.

5. The display device according to claim 4, wherein the second predetermined value is equal to or greater than a rated loading amount.

6. A controller that calculates the weight loaded in the body from the internal pressure of the suspension cylinder on the dump truck, and a side surface of the body when the weight loaded in the body exceeds the first predetermined value by a signal from the controller. A device for displaying the weight loaded in the body of a dump truck, which is provided with an arm-type display portion that protrudes more laterally.

7. The weight loaded in the body of the dump truck according to claim 6, wherein the first predetermined value is equal to or less than a rated loading amount.

Clothing iff.

8. The dumping weight display in the body of the dump truck according to claim 6, wherein a lamp is provided on the arm type display section so as to be turned on when the display section protrudes to the side of the vehicle body. apparatus.

9. The arm-type display unit is mounted on the side of the cab so as to be rotatable between a vertical posture and a horizontal posture, and protrudes laterally from the side surface of the body when it is in the horizontal posture. The load weight display device in a body of a dump truck described in claim 6.