JP2002154371A - Sheet covering device for dump truck cargo loading platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dropping and scattering of sediment by efficiently applying a sheet over an overall upper surface of the sediment loaded on a cargo loading platform of a dump truck. SOLUTION: The sheet covering device for the dump truck cargo loading platform is devised to cover the overall upper surface of the cargo loading platform A by revolving a sheet frame 2 on which the sheet 1 is extended and provided by constituting it so as to hang down and pull a heavy bob 15 through pulleys 10, 11, 13, 14 by supporting a round rod shaft 2c of one end part of the sheet frames 2, 2A on which the sheet constituted free to fold is extended and provided by a support shaft 4 free to rotate on an upper end part of a side frame plate 5 of the dump truck cargo loading platform A and tying a rope 8 on a round rod shaft 2d of the other end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet covering device for a dump truck loading platform which efficiently covers the entire upper surface of earth and sand loaded on the loading platform of a dump truck to prevent the falling and scattering of the soil. Things.

[0002]

2. Description of the Related Art The loading platform of a dump truck for loading and transporting earth and sand, etc., uses a motor or the like to rotate a sheet frame with a sheet stretched over the upper end portions of the left and right side frame plates. It is moved so as to cover the upper surface of the loading platform. Generally, the middle portion of the loading platform is generally wider (about half of the area of the loading platform) and is vacant. Sediment loaded from the part spills or scatters, which hinders the running of following vehicles and deteriorates the road environment.

[0003] For this purpose, measures are taken to prevent falling or scattering of the loaded earth and sand by covering the sheet with a widely vacant middle portion of the loading platform. It is troublesome to put on, and requires a lot of labor and effort.

Means for solving the problem can be considered by increasing the width of the sheet frame on which the sheets are stretched so as to cover the widely vacant intermediate portion of the loading platform. However, the turning radius is increased by increasing the width of the sheet frame. When the seat frame is rotated, it may hit the adjacent object when it is rotated, making it difficult to cover the space in a narrow space, which is dangerous, and when it is not covered, it is mounted in a compact state on the side frame plate side of the loading platform Can not.

[0005]

Means for Solving the Problems In view of the above-mentioned conventional problems, the present inventor has conducted intensive studies and trial production tests, and as a result, has accomplished the development of a sheet covering device for a dump truck loading platform which can be solved by the following means. Reached. (1) One end of a foldable sheet is rotatably supported and attached to the upper end of the side frame plate of the dump truck loading platform, and a rope is tied to another end and pulled from above. And a sheet covering device for the dump truck loading platform, wherein the sheet is rotated to cover the entire upper surface of the loading platform. (2) One end of the foldable sheet is rotatably supported and attached to the upper end of the left and right frame plates of the dump truck loading platform, and the left and right sheets are rotated and covered to cover the loading platform. (1) wherein the other end of the sheet covering device is close to the sheet covering device for a dump truck loading platform. (3) The sheet covering device for a dump truck loading platform according to the above (1) or (2), wherein the sheet is stretched on a sheet frame framed with a round bar, and the sheet frame is freely foldable. . (4) A pulley is arranged at substantially the center of the head portion in front of the dump truck loading platform and a horizontal upper portion thereof. Any one of (1) to (3) above, wherein the weight is suspended and the rope is pulled by the weight of the weight.
It is a sheet covering device for dump truck loading platforms described in Item. (5) The sheet covering apparatus for a dump truck loading platform according to the above (4), wherein a pulley disposed substantially at the center of a head portion in front of the dump truck loading platform can be relocated in a lateral direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1 showing an embodiment. A sheet 1 is wound around a sheet frame 2, 2A framed by a round bar with a string 3, and stretched.
Round rod shafts 2b projecting from both ends of the seat frame 2A are fitted into sockets 2a provided at both ends of the seat frame 2, and are joined so as to be foldable in two. In the examples,
The sheet 1 is wound around the sheet frames 2 and 2A, which are framed by round bars, with a cord 3 and stretched to be freely foldable. However, in order to reduce the weight, the round bar may be formed into a round pipe, or the edge of a rigid thin sheet may be formed. The reinforced part may be joined with a hinge or the like to make it freely foldable.

The round bar shaft 2c at one end of the sheet frame 2, 2A on which the sheet 1 is stretched as described above is supported at a plurality of locations by the support bearing 4, and the side frame plate 5 of the dump truck A is supported.
One end of the round bar shaft 2c is connected to a motor 6 with a speed reducer at a low rotational speed by a joint 7 to rotate the seat frame 2 on which the seat 1 is stretched. It is like that.

On the other hand, sheet frames 2 and 2
A rope 8 is tied to the round bar shaft 2d at the other end of A to pull it. In this embodiment, a pulley 10 is disposed on a substantially central wall surface of a head portion 9 in front of a dump truck loading platform. The rope 8 is hung and guided to the upper part of the head portion 9 via a pulley 11 disposed laterally above the pulley 10, and a weight 15 is provided via pulleys 13 and 14 disposed on a support bracket 12.
Is suspended and pulled by the weight of the weight 15. The weight 15 is protected in the rectangular tube body 16 and guided to the back side of the wall surface of the head portion 9 and is guided so as not to swing.

FIG. 2 is a plan view showing an embodiment in which the above-mentioned structure is mounted on the upper end portions of the left and right side frame plates 5 of the dump truck A so as to cover the entire upper surface of the cargo truck A. In the figure, left and right seats 1 and 1 are seat frames 2 and 2A
The seat frame is joined to the socket 2a and the round bar shaft 2b shown in FIG. 1 so as to be foldable by fitting, and one end portion of the foldably joined sheet frames 2, 2A. Are supported at a plurality of locations by support bearings 4 and 4 so that the round bars 2c and 2c can rotate, and are mounted on the upper surfaces of both left and right side frame plates 5 and 5 of the loading platform A.

On the other hand, ropes 8, 8 are connected to round rod shafts 2d, 2d at the other ends of the seat frames 2, 2A, and pulleys are disposed on a substantially central wall surface of a head portion 9 of the loading platform A. 1
The ropes 8 and 8 are guided over the head 9 by hanging on the pulleys 11 and 11 disposed on the left and right sides of the pulleys 10 and 10 and the support bracket 12 above the head 9. Weights 15 and 15 are provided via the pulleys 13 and 14 provided.
Is suspended. The weights 15, 15 are protected by the rectangular cylinders 16, 16 and are guided to the back side of the wall surface of the head, and are guided so as not to swing.

The pulleys 10 and 10 disposed close to the substantially central wall surface of the head 9 move the hook arms 17 and 17 to which the pulleys are mounted from the position where the substantially central wall of the head 9 is mounted. Left and right mounting parts 9a, 9a, 9b, 9
b, when the amount of earth and sand loaded on the loading platform A is large, the sheet frames 2, 2A on which the sheets 1, 1 are stretched according to the loading height can be inclined and covered. It is.

Next, the operation and action of covering the loading table A constructed as shown in FIG. 2 will be described with reference to FIGS. Sheets 1, 1 stretched over sheet frames 2, 2A
Is normally (when earth and sand are not loaded), the sheet frames 2 and 2 are folded outside the left and right side frame plates 5 and 5 of the loading platform A.
The round rods 2c, 2c at one end of A are attached and mounted while supported by support bearings 4, 4, and the round rods 2d, 2d at the other end are connected to ropes 8, 8 via pulleys 10, 10 and pulleys 11, 11, respectively. The weight of the weight 15 is pulled obliquely upward and the motor 6
(FIG. 1) is activated and the round bar shaft 2 of the sheet frame shown in FIG.
By rotating c and 2c, the seat frames 2 and 2 are respectively rotated outward (in the directions of arrows A and B).

As the seat frames 2 and 2 shown in FIG. 4 rotate obliquely upward and outward of the side frame plates 5 and 5 from the state shown in FIG.
2A gradually opens, and as shown in FIG. 5, the sheet frames 2 and 2 further open as they rotate obliquely upward inside the side frame plates 5 and 5, and as shown in FIG. When the seats become almost horizontal, the folded sheet frames 2 and 2A open completely (almost 180 degrees), and the entire upper surface of the loading platform A is opened by the left and right sheets 1 and 1 stretched on the sheet frames 2 and 2A. The motor 6 is stopped in the state of being covered. Alternatively, the sheet frame 2 on which the sheet 1 is stretched in the covered state is stopped, and the motor 6
May be idle.

In order for the folded sheet frames 2 and 2A to be completely opened and to maintain a substantially horizontal state, the weight of the sheet frame 2A to which the sheet 1 is attached and the rope 8 are pulled. With respect to the weight of the weight 15, good results could be obtained by slightly increasing the weight of the sheet frame 2 </ b> A.

In the case where the amount of earth and sand loaded on the loading platform is large and the top surface is slightly piled up, the pulleys 10 and 10 disposed close to the substantially central wall surface of the head portion 9 are provided.
2 as shown in FIG. 2 (the mounting portions 9a and 9b).
Hook arms 17, 1 having the pulleys 10, 10 attached thereto.
By transferring the sheet 7, as shown in FIG. 7, good results could be obtained for covering the sheets 1, 1 stretched on the sheet frames 2, 2A with a gentle inclination.

[0016]

As described above, according to the present invention, the sheet or the sheet frame on which the sheet is stretched is made freely foldable, and the sheet or the sheet frame on which the sheet is stretched is rotated to cover the sheet. Therefore, it is possible to efficiently cover the entire upper surface of the loading platform loaded with earth and sand, thereby speeding up the covering operation, and at the same time the soil loaded on the loading platform is spilled or scattered, and the following vehicle This is effective in preventing hindrance of driving and deterioration of the road environment.

Further, since the sheet or the sheet frame on which the sheet is stretched is folded and mounted on the side surface of the side frame plate of the loading platform, it can be mounted in a compact state, and the sheet or the sheet frame on which the sheet is stretched is rotated. Since this can be performed in a small space, the covering operation in a narrow place becomes easy without hitting an adjacent object.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention in which the entire upper surface of the loading platform is covered.

FIG. 3 is an explanatory view showing an operation process of covering the entire upper surface of the loading platform.

FIG. 4 is an explanatory view showing an operation process of covering the entire upper surface of the loading platform.

FIG. 5 is an explanatory view showing an operation process of covering the entire upper surface of the loading platform.

FIG. 6 is an explanatory diagram of a state where the entire upper surface of the loading platform is covered.

FIG. 7 is an explanatory view illustrating a state where the entire upper surface of the loading platform is covered by being inclined;

[Explanation of symbols]

 A Carrying platform 1 Seat 2, 2A Seat frame 2a Socket 2b, 2c, 2d Round bar shaft 3 String 4 Support bearing 5 Side frame plate 6 Motor 7 Joint 8 Rope 9 Head part 9a, 9b Attachment part 10, 11, 13, 14 Pulley 12 Support bracket 15 Weight 16 Square cylinder 17 Hook arm

Claims (5)

[Claims] 1. A structure in which one end of a foldable sheet is rotatably supported and attached to the upper end of a side frame plate of a dump truck, and a rope is tied to another end and pulled from above. And a sheet covering device for the dump truck loading platform, wherein the sheet is rotated to cover the entire upper surface of the loading platform. 2. A state in which one end of a foldable sheet is rotatably supported and attached to upper ends of left and right side frame plates of a dump truck loading platform, and the sheet is rotated to cover the loading platform. 2. The sheet covering device for a dump truck loading platform according to claim 1, wherein the other ends of the left and right sheets are close to each other. 3. The sheet covering device for a dump truck loading platform according to claim 1, wherein the sheet is stretched on a sheet frame formed by a round bar, and the sheet frame is freely foldable. 4. A pulley is disposed at substantially the center of the head portion in front of the dump truck loading platform, and a pulley is disposed above and beside the head portion. A rope tied to another end of the seat is hung and guided to above the head portion. 4. The sheet covering device for a dump truck loading platform according to claim 1, wherein the weight is suspended downward and the rope is pulled by the weight of the weight. 5. 5. The sheet covering device for a dump truck loading platform according to claim 4, wherein a pulley disposed substantially at the center of a head portion in front of the dump truck loading platform can be relocated in a lateral direction.