JPS5941412B2 - Packing box safety confirmation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety confirmation device for confirming the tilting direction of a cargo box in a side dump truck or a tricycle dump truck.

In general, side dump trucks or tri-turn dump trucks are equipped with removable hinges at four positions on both the front and rear sides of the cargo box between the chassis and the cargo box, and the hinges are operated to engage or disengage to load the cargo. The box can be tilted in two directions on both sides or in three directions, both sides and backward.

This hinge switching operation can be performed in the driver's cabin or outside the vehicle, but it is impossible to confirm whether the hinge is fully operating in either of the two states mentioned above, and it is especially impossible to do so inside the driver's cabin. Therefore, if the cargo box were to be tilted even though the engagement state was incomplete, there was a possibility that the cargo box would fall from the vehicle platform, which was extremely dangerous.

In addition, when restoring a cargo box from a tilted position to a horizontal position, it was not possible to confirm whether or not it was completely seated on the chassis, and there was a possibility that the hinges could be switched while the cargo box was slightly tilted. .

i The present invention has been made in view of the above problems, and by detecting the engagement and disengagement state of the hinge and displaying the detected state in the driver's cab, it is possible to confirm the engagement and disengagement state of the hinge in the driver's cab. This provides a safety confirmation device for cargo boxes.

1 Hereinafter, the configuration of the present invention will be explained with reference to the drawings in terms of embodiments.

As shown in FIG. 1, 1 is a three-turn dump truck, and a cargo box 3 is mounted on a chassis 2 so as to be tiltable to both sides and rearward.

As shown in FIG. 2, between the vehicle chassis 2 and the cargo box 3, there are hinges 4L at four positions on both the front and rear sides of the cargo box 3.

4R, 5L, and 5R are provided, and a dump cylinder 6 is connected to the center.

Hinge 4L. 4R, 5L, 5R are hinge receivers 7L, 7R
,8L.

5 8R and hinge pins 9L, 9R, 10L, 10R, etc. that engage and disengage from the hinge receivers 7L, 7R, 8L, and 8R, and each hinge pin 9L, 9R, and 10L.

By operating 10R into an engaged state or a disengaged state, the hinge position is switched so that the cargo box 3 can be tilted in any of three directions.

Also, each hinge pin 9L, 9R, 10L. 10R is linked to one operating lever 12 provided in the driver's cab 11 via link means (not shown).

The operating lever 12 is also connected to a hydraulic system (not shown) of the dump cylinder 6, and is rotated along a guide groove 13, as shown at 5 in FIG.

The guide groove 13 is formed into a substantially E-shape with three vertical grooves 13a and one horizontal groove 13b connecting each vertical groove 13a.

When the operating lever 12 is placed in the center of the horizontal groove 13b (X), the rear hinges 5L and 5R are engaged, when it is placed on the left end (Y), the left hinges 4L, 5L are engaged, and when it is placed on the right end (Z), the right hinges 4R, 5R are engaged. When this state is reached and the dump cylinder 6 is rotated downward along each vertical groove 13a, the dump cylinder 6 is extended and the cargo box 3 is tilted.

Further, the chassis 2 includes a first detection means 14 and a second detection means 1.
5 is provided, and a display means 16 is provided in the driver's cab 11.

The first detection means 14 is connected to each hinge 4L, 4R, 5L, 5.
The limit switches 17L, 17R, 18L, and 18R are provided near each hinge to detect the engagement/disengagement state of R.

Limit switches 17L and 17R. 18L and 18R are hinge pins 9L, 9R, and 10L.

When 10R is inserted from one end of the hinge receivers γL, 7R, 8L, and 8R, fully engaged, and protrudes from the other end, the protruding portions contact and operate.

The second detection means 15 detects the tilted state of the cargo box 3, and has a limit switch 1 installed at the center of the front part and the center of both sides of the cargo box 3.
The structure includes 9F, 19L, and 19R.

Each limit switch 19F, 19L. 19R is operated when the lower surface of the cargo box 3 comes into contact with the cargo box 3 when the cargo box 3 is completely seated on the vehicle chassis 2.

The display means 16 is connected to the first and second detection means 14.15, as shown in FIG. 3, and connected to each hinge 4L.

Four hinge display parts 20 showing the status of 4R, 5L, 5R
a, 20b, 20c, and 20d, and three cargo box display sections 21a and 21b that indicate the direction in which the cargo box 3 is tilted.

21c.

FIG. 4 shows the wiring system between the first detection means 14 and the display means 16, in which limit switches 17L and 17R are connected to the main circuit 23 equipped with a power supply 22.

A contacts 24a and 24b connected to 18L and 18R.

24c and 24d are connected in parallel, each a contact 24a2
4b, 24c, 24d and the main circuit 23, each hinge display section 20a, 20b, 20c, 20d is connected.

FIG. 5 shows the wiring system between the second detection means 15 and the display means 16, and shows the b contact 2 connected to the front limit switch 19F and both side limit switches 19L and 19R.
5a and C contact 25b.

25c is connected in series to a main circuit 27 having a power supply 26, and both C contacts 25b, 25c are connected to each cargo box display section 21a, 2.
1b and 21c are connected.

Next, in accordance with the tilting movement of the cargo box 3, both the detection means 14 and 15
And the operation of the display means 16 will be explained.

First, when the cargo box 3 is completely seated on the chassis 2,
When the operating lever 12 is operated to the central position
When fully inserted into R, both limit switches 18L and 18R at the rear operate and the two A contacts 24c and 24
d is closed, and the two central hinge display parts 20c and 20d
lights up to indicate that the hinges 5L and 5R are fully engaged.

On the other hand, the cargo box display sections 21a and 21b. 21c is each limit switch 19F, 19L.

19R is activated, and the B contact 25a and C contact 25b.

25c is in the state shown in FIG. 5, all lights are turned off to indicate that the cargo box 3 is completely seated.

From this state, when the operating lever 12 is rotated along the central longitudinal groove 13a, the dump cylinder 6 is extended and the cargo box 3 is tilted rearward.

At this time, each limit switch 19F of the second detection means 15
, 19L, and 19R are cut off, and the B contact 25a and the C contact 25b.

25c is switched, and the central cargo box display section 21b lights up to display that the cargo box 3 is tilted backward.

When the cargo box 3 is restored horizontally and is completely seated, the cargo box display section 21b turns off as described above.

When the operating lever 12 is operated to the left end position Y of the lateral groove 13b, both left hinges 4L and 5L are operated to the engaged state,
Hinge pin 9L, IOL hinge receiver? When fully inserted into L, 8L, both left limit switches 17L, 1
8L is activated, the two A contacts 24a and 24c are closed, the two left side hinge display parts 20a and 20c are lit, and when the operation lever 12 is operated to the right end position Z of the lateral groove 13b, the above-mentioned Similarly, hinge pin 9R on the right side.

When 10R is completely inserted into hinge receivers 7R and 8R,
The right limit switches 17R and 18R and their C contacts 24b and 24d operate, and the two right hinge display sections 2
0b and 20d light up to indicate that they are fully engaged.

Furthermore, when the cargo box 3 is tilted to the left, the second detection means 1
Limit switch 19F on the front and right side of 5, 1
9R is cut off, its B contact 25a and C contact 25c are switched, the leftmost cargo box display section 21a lights up, and the cargo box 3
When tilted to the right, the front and left limit switches 19F and 19L are cut off, and their b contacts 25a and C
The contact point 25b switches, and the rightmost cargo box display section 21c lights up to indicate that the cargo box 3 is tilted in each direction, and turns off when the cargo box 3 is restored horizontally and is completely seated. do.

In this case, the three-roll dump truck 1 has been described, but the present invention can be similarly applied to a side dump truck, and in this case, only two cargo box display sections are required.

Also, hinges 4L, 4R, and 5L in this actual case. 5R has hinge pins 9L and 9R on hinge receivers 7L, 7R, 8L, and 8R.
, 10L, and 10R are inserted by operating them, but it consists of a gutter-shaped hinge receiver, a hinge pin that engages with the hinge receiver, and a hook that releases the binding between the hinge receiver and the hinge pin, and the hook can be rotated. It may also be of an operated type, in which case a limit switch is activated when the hook is completely secured.

Furthermore, in this actual case, the first detection means 14 and the second detection means 1
5 has been described, but either one may be used, and only the engaged/disengaged state of the hinge or only the tilted state of the cargo box may be displayed in the driver's cab.

As described above, according to the present invention, a detection means for detecting the engagement/disengagement state of the hinge is provided, and since a display means linked to the detection means and displaying the detection state is provided in the driver's cab, a predetermined hinge is completely It is possible to check whether the container is operating in a properly engaged state and whether the cargo box is completely seated, which helps prevent erroneous operations and detect various abnormalities. Because you can, you can prevent accidents from happening.

[Brief explanation of drawings]

The drawings illustrate the actual embodiments of the present invention; FIG. 1 is a schematic plan view of a three-turn dump truck, FIG. 2 is a schematic diagram of the hinge and detection means, and FIG. 3 is a schematic diagram of the operating lever and display means. , FIG. 4 is a wiring system diagram between the first detection means and display means, and FIG. 5 is a wiring system diagram between the second detection means and display means. 1... Tri-turn dump truck, 2... Chassis,
3... Packing box, 4 pieces 7, 4R, 5L, 5R...
...Hinge, 11...~Driver's cab, 14...
First detection means, 15... Second detection means, 16.
...Display means, 17L, 17R1゜18L, 18
R...Limit switch, 19F. 19L, 19R, ... limit switch, 20
a. 20b, 20c, 20d-.'' Hinge display section, 21a. 21b, 21c... Packing box display section.

Claims (1)

[Scope of Claims] 1. In a side dump truck or tri-turn dump truck in which a cargo box is mounted on a chassis and a hinge that can be freely engaged and disengaged between the chassis and the lower part of the cargo box, the engagement and disengagement state of the hinge is detected. A safety confirmation device for a cargo box, comprising a detection means and a display means connected to the detection means and indicating a detection state in the driver's cab. 2. The cargo box safety confirmation device according to claim 1, wherein the detection means is a switch provided near the hinge, and detects the engagement/disengagement state of the hinge.