JPS6234219B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dump truck, and particularly to a canopy opening/closing device for a dump truck that allows a cargo box to be tilted laterally.

The conventional canopy opening/closing device has no loading box as shown in Figure 1.
One end of a bendable support frame 03 that supports the seat 02 is pivotally supported on one side of the support frame 0.
The other end of 3 is pivotally supported on the free end of an arm 04 that is pivotally supported on the side of the cargo box 01, and by rotating the arm 04, the sheet 02 is folded in half and stored on the side, and the sheet 02 is folded in half and stored laterally above the cargo box 01. It is becoming more and more open to the public.

By the way, if the canopy opening/closing device of the above structure is used in a dump truck that can tilt the cargo box sideways, there is a drawback that the side sliding door cannot be opened because the support frame bent when the seat is stored becomes a rigid body. It was hot.

In order to eliminate the above-mentioned drawbacks, the present invention is designed to allow the support frame to swing even when the seat is stored, so that the support frame does not get in the way when the side sliding door is opened.

An example will be described below with reference to the drawings. Reference numeral 1 denotes a dump truck loading box, and the loading box 1 has a pair of left and right front fixing columns 3, 3 and rear fixing columns 4, 4 erected on a floor plate 2. , a front wall 5 is fixed between the front fixed columns 3, 3, a rear fan door 6 is provided between the rear fixed columns 4, 4, and a front wall 5 is fixed between the front fixed columns 3, 3 and the rear fixed columns 4, 4. Side sliding doors 7, 7 are provided between them, and the upper ends of each of the sliding doors 6, 7, 7 are pivotally supported, and the lower ends are secured by a lashing device 8 that releases the lashing when the cargo box 1 is tilted. tied up.

Next, to explain the canopy opening/closing device 9 that opens and closes the upper part of the cargo box 1, a front guide plate 10 and a rear guide plate 11 are installed in parallel between the front fixing columns 3 and 3 and between the rear fixing columns 4 and 4. There is.

The guide plates 10 and 11 have the same structure, so to explain one of them, the cross section is formed into a U-shape by an upper horizontal surface 12 and a lower horizontal surface 13, as shown in FIG. 14,
14 is interposed.

15 is a sheet that covers the upper part of the packing box 1;
5 is somewhat longer than the space between the guide plates 10 and 11, and the loading box 1
It has a shape with a width equivalent to that of the

One end of the sheet 15 is connected to a flat plate 1 as shown in FIG.
6 and 16, and is fixed to the upper end of the side sliding door 7.

Further, on the back surface of the other side of the sheet 15, a pair of vertical shafts 17, 17 having substantially the same length as the sheet 15 are provided.
and a plurality of horizontal shafts 18 somewhat shorter than half the width of the sheet 15 are provided, and a support frame 19 is provided in which the sheet 15 is connected to the support frame 1.
9 is integrated with a string 20, and the vertical axis 1
Among the guide plates 11, 17, the vertical axis 17 on one side, that is, the upper side in FIG.
2, 12 so as to be able to slide along the top.

21, 21 are brackets 22 erected at the center of the lower horizontal surfaces 13, 13 of the guide plates 11, 11;
The arm is pivotably supported laterally at 22,
The arms 21, 21 have a length approximately half the width of the packing box 1, and their free ends are connected to both ends of the vertical shaft 17 on the other side, that is, on the lower side in FIG.

Reference numeral 23 denotes an electric motor for rotating the arm 21. The electric motor 23 is fixed to the front surface of the front wall 5 via a bracket 24, and a reducer 25 for decelerating the rotation of the electric motor 23 is mounted next to the bracket. The gear reducer 25 is fixed to the front wall 5 via a shaft 26, and a shaft 27 that passes through the front wall 5 and supports the arm 21 on the bracket 22 is connected to the reducer 25.
As a result, the rotation of the electric motor 23 is transmitted to the arm 21, and the arm 21 can be rotated.

In the example, one sheet is used to cover the entire packing box, but a pair of sheets is provided on the left and right sides to cover only the side half of the packing box, and a sheet is placed on both sides to cover the entire packing box. Even if it is stored, similar effects can be obtained.

The present invention has the above-mentioned structure, and its operation will be explained next. First, when traveling with earth and sand, pulverized coal, etc. loaded in the cargo box 1, the electric motor 23 is started from the state shown by the two-dot chain line in Fig. 4. The arms 21, 21 are rotated counterclockwise via the reducer 25 and shaft 27.

When arms 21, 21 are rotated, arm 2
The end of the support frame 19 connected to the free ends of the support frames 1 and 21 makes an arcuate movement, and the other end, the vertical shaft 17, rises from the side of the cargo box 1, and the guide plate 1
After contacting the upper horizontal surfaces 12, 12 of 1, 11,
It slides on the upper horizontal surfaces 12, 12, and moves in the order of the dashed line and the solid line in FIG.

When the support frame 19 reaches the solid line position in FIG. 4, the sheet 15 covers the entire upper part of the cargo box 1, as shown in FIGS. 2 and 3, to prevent the loaded items from scattering.

Next, when discharging the loaded object, the electric motor 23 is started from the state shown by the solid line in FIG. 4, and the arm 21 is rotated clockwise.

When the arm 21 is rotated, the end of the support frame 19 connected to the free end of the arm 21 makes an arcuate movement, and the other end, the vertical axis 17, moves along the upper horizontal surface 12 of the guide plates 11, 11. 12, and finally the support frame 19 is suspended from the arm 21 on the side of the cargo box 1 as shown by the two-dot chain line, and the sheet 15 is folded in half and stored, and the load is Open the top of box 1. after that,
When discharging the loaded object rearward, when the cargo box 1 is tilted backward, the lashing device 8 at the bottom of the rear sliding door 6 is released with the tilting, the rear sliding door 6 opens under its own weight, and the loaded object is released. It is discharged. In addition, when discharging to the side, when the cargo box 1 is tilted to the side as shown in FIG. It opens under its own weight and the loaded object is discharged. At this time, the support frame 19 located on the outside of the side sliding door 7 is suspended from the arm 21 and can swing, and as the side sliding door 7 rotates. Support frame 1
9 can also swing as shown in FIG. 5, so it does not cause any trouble when the side sliding door 7 is opened.

As described above, according to the present invention, the seat can be reliably opened and closed simply by providing a support frame on a part of the seat, so the structure is simple and the seat can be manufactured at low cost.

In addition, even when the load is to be discharged to the side, the support frame stored on the side of the cargo box is rotatably suspended, so there is no need to open or close the side door. It does not cause any hindrance and can be discharged reliably.

[Brief explanation of the drawing]

Figure 1 is a conventional example, Figure 2 is an overall view of the present invention, Figure 3 is a side view of Figure 2, Figures 4 and 5 are operating state diagrams, Figure 6 is a front view, and Figure 7. Figure 2 A-A
The sectional view, FIG. 8, is a BB sectional view. 1 is a packing box, 9 is a canopy opening/closing device, 10 and 11 are guide plates, 15 is a seat, 19 is a support frame, 2
1 is an arm.

Claims (1)

[Claims] 1. In a dump truck with a side sliding door that allows a cargo box to be tilted laterally, a front guide plate and a rear guide plate are respectively constructed on top of each pair of front and rear fixed pillars that support the side sliding door, and the above-mentioned A sheet is provided between the guide plates to cover the upper part of the cargo box, one side end of the sheet is fixed to a side fan door, and a support frame having a width of about half or less of the sheet is provided on the other side. , a free end of an arm pivotally supported on a guide plate is pivotally supported at the end of the support frame on the other side of the seat, and an end of the support frame on the side of the seat on the upper surface of the guide plate is supported. 1. A canopy opening/closing device for a dump truck, characterized in that the canopy opening/closing device for a dump truck is provided so as to be slidable, and the upper part of the cargo box can be opened and closed by rotating the arm with a drive means as appropriate.