JPH026717A - Loading position indicating device for dump truck - Google Patents

Abstract

PURPOSE:To load a loading object in a position which becomes equal in a vessel by providing a display part for detecting the pressure of suspension cylinders of the front part and the rear part and instructing to load the loading object in the front part or the rear part of the vessel. CONSTITUTION:On suspension cylinders 3, 5 of each front wheel 2 and rear wheel 4 of a car body 1, pressure sensors are provided, respectively. On the side face of a driver's cab 6, a display board 9 is provided, and on the board 9, display parts 10-13 are provided. Display parts 11 (12) are formed in an arrow shape going toward the front (rear) sides. In this state, pressure signals of four pieces of pressure sensors are inputted to a controller, and whenever a loading object is loaded in a vessel 7, the controller calculates the dislocation quantity of the center-of-gravity position of the car body 1 at that time and the center-of- gravity position at a normal time. Subsequently, when its actual center-of-gravity position is dislocated to the front (rear), it is instructed to an operator to load the loading object to the rear (front) parts of the vessel 7 by displaying the display parts 12 (11). In this regard, display parts 10 and 13 display a fact that the center-of-gravity position is within a set allowable range, and an actual loading weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for indicating the loading position when loading materials such as earth and sand into a vessel of a dump truck using a loading machine.

[Conventional technology]

A dump truck has a vessel on its body that can be raised or lowered, and a loading machine loads materials such as earth and sand into the vessel, and then drives to a predetermined position and raises the vessel to discharge the loaded material. ing.

[Invention or problem to be solved]

Such dump trucks are designed so that the weight of the cargo inside the vessel can be equally distributed between the front wheels and the rear wheels.

However, in order to load the cargo into the vessel using a loading machine, the cargo is loaded multiple times at the front, center, and rear of the vessel, so the cargo is evenly distributed in the front, center, and rear of the vessel. It is difficult to load the items so that they are equal to each other, resulting in uneven loading.

In this way, if the cargo is loaded unevenly in the vessel, a heavy load will be applied to some of the wheels, making them less resistant to wear, cuts, and heat than other wheels, resulting in a shortened lifespan. turn into.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a loading position indicating device that indicates the loading position of loaded items into a vessel so that the loaded items are evenly spaced.

[Means and effects for solving the problem] A second display section 11 that instructs loading to the front of the vessel 7 and a third display section 12 that instructs loading to the rear of the vessel 7 are provided on the side of the dump truck. At the same time, it is determined whether the loaded material in the vessel 7 is equal or uneven based on the pressure of the front and rear suspension cylinders 3 and 5 of the dump truck, and based on this, the second and third display sections 11 and 12 are displayed. This is a loading position indicating device for a dump truck, which is equipped with a controller 20 that displays and operates the display. By looking at parts 11 and 12, it is possible to know whether the cargo is even or uneven within the vessel 7, and to load the cargo at a position where the cargo is even.

〔Example〕

As shown in FIG. 1, a pair of left and right front wheels 2.2 are attached to the front part of the vehicle body 1 via left and right front suspension cylinders 33, and a pair of left and right rear wheels 4, 4 are attached to the rear part of the vehicle body 1 via left and right front suspension cylinders 33. It is attached via rear suspension cylinders 5, 5, and a driver's cab 6 is provided at the front of the vehicle body 1, and a vessel 7 or cylinder 8 is provided at the rear so that it can be raised or lowered.

A display board 9 is provided on the side surface of the driver's cab 6, and the display board 9 is provided with first, second, and third display sections 1011.12 and a loaded weight display section 13.

The first display section 10 has a rectangular shape as shown in FIG. 2, and a second display section 11 is provided on the front side of the first display section 10, and the second display section 11 has an arrow shape pointing toward the front side. In addition, the third display section 12 is arranged in the shape of an arrow pointing toward the rear side and is provided on the rear side of the first display section 10, and one of the display sections is turned on by a signal from the controller 20. In addition to the display operation, the loaded weight display section 13 displays the actual loaded weight from the controller 20 using lamps in three colors: green, orange, and red.

Pressure is inputted to the controller 20 from a pressure sensor 21 provided in each suspension cylinder, and the loaded weight is calculated based on the pressure of each pressure sensor 21, and it also determines whether the loaded items in the vessel are equal or uneven. I am determining whether there is.

In other words, the pressure sensor 21 detects the pressure inside the suspension cylinder, and since the pressure inside the suspension cylinder is proportional to the weight of the loaded object, each pressure sensor 2
The weight of the cargo in the vessel 7 can be calculated based on the pressure detected by the sensor 1, and whether the cargo in the vessel 7 is equal or uneven depending on the pressure in the front suspension cylinder 3 and the pressure in the rear suspension cylinder 5. Accordingly, the first, second, and third display sections 10
, 1.1, 1.2.

For example, the position of the center of gravity of the vehicle body when the cargo is loaded into the vessel 7 is calculated based on the pressure level of each pressure sensor 21, and the amount of deviation between the actual center of gravity position and the normal center of gravity position is calculated as shown in FIG. The vertical axis is taken as the vertical axis, and the weight of the loaded object is taken as the horizontal axis, and the deviation amount for each loading operation and the weight of the loaded object are calculated as shown by the black circles. At other times, the second or third display section 11, 12 is displayed, and at other times, the first display section 10 is displayed.

Specifically, when the center of gravity shifts forward, the third display section 1
2 is displayed to instruct the operator to load to the rear of the vessel 7, and when the center of gravity is moving backward, the second display 11 is displayed to instruct the operator to load to the front of the vessel 7. .

The display board 9 may be provided on the side of the vehicle body 1 or the vessel 7.

That is, since the cargo is loaded into the vessel 7 from the side, the display board 9 may be provided on the side of the dump truck.

[Effects of the Invention] When loading cargo into a vessel using a loading machine, the operator of the loading machine can check whether the cargo is evenly distributed in the vessel 7 by looking at the second or third display section 11.12. Being aware of the unevenness, you can load the cargo in an even position.

Therefore, the cargo can be easily and evenly loaded into the vessel 7, and since no large load is applied to any of the wheels, the life of the wheels can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall front view;
FIG. 2 is an explanatory diagram of the display operation section, and FIG. 3 is a chart showing an example of display operation control. 7 is a vessel, 11 is a second display section, and 12 is a third display section.

Claims (1)

[Claims] A second display section 11 for instructing loading to the front of the vessel 7 and a third display section 12 for instructing loading to the rear of the vessel 7 are provided on the side of the dump truck. Judging whether the cargo in the vessel 7 is uniform or uneven based on the pressures in steps 3 and 5,
A loading position indicating device for a dump truck, characterized in that a controller 20 is provided for displaying the second and third display sections 11 and 12 based on the controller 20.