JP2003112666A - Dump truck with synthetic resin plate laid on bottom surface of load carrying platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bottom surface of a load carrying platform of a dump truck having the aluminum-made load carrying platform from being damaged by earth and sand, and to prevent earth and sand, etc., from being left on the load carrying platform when unloading earth and sand, etc. SOLUTION: A synthetic resin plate is laid on the substantially whole surface of the bottom surface of the load carrying platform of the dump truck having the aluminum-made load carrying platform.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dump truck having an aluminum cargo bed, and a dump truck having a synthetic resin plate laid on the cargo bed.

[0002]

2. Description of the Related Art Conventionally, dump trucks are made of steel and have an empty weight of about 10500 kg. Exhaust gas pollution caused by running of such a heavy vehicle, pollution caused by tire wear, and road damage. Etc. became a social problem.

Therefore, in order to prevent air pollution by reducing the weight of the vehicle body and increasing the loading capacity of one time, the number of times of traveling is reduced, and by improving the fuel consumption by reducing the weight of the vehicle when it is empty, A dump truck with an aluminum carrier has been developed.

The body weight of such an aluminum dump truck is about 8500 kg, which is about 2000 kg lighter than that of a conventional steel dump truck, so that the fuel consumption during empty running is about 20%.
It is reported to have improved.

[0005]

However, if the loading platform is made of aluminum, it will be lighter, but since the metal is softer than steel, the surface of the loading platform will be damaged when loading sand and the like, and dirt will enter the scratches. As a result, there is a drawback that the friction between the earth and sand when unloading the earth and sand and the bottom surface of the bed becomes large, and a part of the earth and sand remains on the bed.

The present invention has been made under the circumstances as described above, and an object of the present invention is to prevent the bottom surface of the loading platform of a dump truck having an aluminum loading platform from being damaged by soil or the like, and to prevent the loading of soil or the like. The purpose is to provide a dump truck that does not leave sediment on the loading platform when it is unloaded.

[0007]

The above object of the present invention is achieved by a dump truck having an aluminum luggage carrier, in which a synthetic resin plate is laid on substantially the entire bottom surface of the luggage carrier.

The above object of the present invention can be achieved more effectively by using a polyethylene resin plate or a polypropylene resin plate as the synthetic resin plate.

Further, the above object of the present invention can be achieved more effectively by dividing the synthetic resin plate into a plurality of sheets, arranging them with a predetermined gap, and fixing them to the luggage carrier. In particular, the synthetic resin plate is divided into two in the direction of the shorter side, and the two divided synthetic resin plates are respectively arranged with a predetermined gap and fixed to the luggage carrier. To be done.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a dump truck having an aluminum cargo bed, and a dump truck having a synthetic resin plate laid on the cargo bed.

A detailed description will be given below with reference to the drawings.

FIG. 1 is an external view of a general dump truck.

FIG. 1A shows a state where the loading platform 1 is horizontal and is loaded or loaded, and FIG. 1B shows a state when unloaded. As the front of the loading platform rises as shown in (B), the sand and the like loaded on the loading platform slides down from the rear.

When the loading platform is made of aluminum, it is softer than steel, and therefore when the soil and the like are loaded on the loading platform 1, the bottom surface 2 of the loading platform 1 is dented by the impact of the falling of the soil and the like, or the loading and unloading of the soil and the like occurs. Sliding down damages the bottom surface 2 of the loading platform, and further, when dirt or sand enters the scratches or depressions, the frictional force when sliding down the sand or sand increases, and as a result, the sand or sand remains on the loading platform due to the friction. There is a problem that it ends up.

Therefore, in the dump truck according to the present invention, the synthetic resin plate 3 is provided on the bottom surface 2 of the loading platform 1 as shown in FIG.
Was laid on the entire surface, and the front side was fixed by the fixing member 4. The reason why the synthetic resin plate 3 is made slightly smaller than the bottom surface 2 of the luggage carrier is to provide "escape" when the synthetic resin plate 3 expands due to an increase in ambient temperature. Further, the front side is fixed in order to prevent the synthetic resin plate 3 from slipping down together with earth and sand when unloading (FIG. 1 (B)).

Here, a polyethylene resin plate or a polypropylene resin plate can be used as the synthetic resin plate 3. In particular, polyethylene resin is light and has excellent wear resistance, impact resistance, and corrosion resistance.
It is a stable material that can withstand temperature changes in the range of 0 degree, and is used for coating electric wires.

Accordingly, there is an advantage that it can withstand a drop impact of earth and sand and that the surface is slippery, so that the earth and sand can be smoothly unloaded.

Polypropylene resin also has similar properties and is a material suitable for use.

FIG. 3 is a view showing a case where a synthetic resin plate is divided into two and laid.

Here, the reason why it is necessary to divide and lay it will be explained.

The size of the bottom surface 2 of the loading platform is about 2 on the side (short side).
When the polyethylene resin having a thickness of 300 mm and a length of about 5000 mm and a thickness of about 13 mm is used in this embodiment in order to obtain sufficient strength, the weight is about 135 Kg, and a single piece has problems in manufacturing and transportation. This is because it was found that there was.

Therefore, it is necessary to manufacture and convey the two-divided or four-divided products so that they can be easily laid on the loading platform of the dump truck.

FIG. 4 and FIG. 5 are views showing a case where four-divided products are laid.

In the case of four divisions, manufacturing and transportation are easier than in the case of two divisions, but when laid, there are more "escape" points, and the earth and sand get in there and remain. There are drawbacks.

Therefore, as shown in FIG. 6 and FIG.
When manufacturing and transporting in divided state and laying on the loading platform 2,
Two pieces may be joined together to form one piece, and the pieces may be laid in a state similar to that of dividing into two pieces. As a joining method, there are a method of adhering with an adhesive and a method of heat-sealing. However, since an adhesive for polyethylene resin which is currently on the market is quick-drying, it is not suitable for adhering a long object like this example. Not suitable. The heat fusion can be performed with a 100V power source using commercially available nichrome wire and transformer.

[0026]

As described above, by laying a synthetic resin plate having high wear resistance and impact resistance on the bottom surface of the dump truck having an aluminum cargo bed, the cargo platform caused by the impact when loading earth and sand etc. While preventing damage to the bottom,
Since the surface of the synthetic resin plate is slippery, it is possible to prevent soil and the like from remaining during unloading and to expect 100% unloading.

[Brief description of drawings]

FIG. 1 is an external view of a dump truck.

FIG. 2 is a diagram showing a platform of a dump truck having a synthetic resin plate laid on the entire bottom surface.

FIG. 3 shows an example in which a synthetic resin plate is divided into two and laid.

FIG. 4 is a first embodiment in which a synthetic resin plate is divided into four and laid.

FIG. 5 is a second embodiment when a synthetic resin plate is divided into four and laid.

FIG. 6 is a first embodiment in which four divided synthetic resin plates are connected and laid.

FIG. 7 is a second embodiment in which four divided synthetic resin plates are connected and laid.

[Explanation of symbols]

1 platform 2 Bottom of loading platform 3 synthetic resin plate 4 fixing members

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Suichiro Tsuchihashi             5-21-5 Honkomagome, Bunkyo-ku, Tokyo Eagle             Da Kasei Co., Ltd.

Claims (5)

[Claims] 1. A dump truck having an aluminum carrier, wherein a synthetic resin plate is laid on substantially the entire bottom surface of the carrier. 2. The dump truck according to claim 1, wherein the synthetic resin plate is a polyethylene resin plate. 3. The dump truck according to claim 1, wherein the synthetic resin plate is a polypropylene resin plate. 4. The dump truck according to claim 1, wherein the synthetic resin plate is divided into a plurality of sheets, each of which is arranged with a predetermined gap and is fixed to a luggage carrier. 5. The synthetic resin plate is divided into two in the short side direction,
The dump truck according to any one of claims 1 to 3, wherein the two divided synthetic resin plates are arranged with a predetermined gap therebetween and are fixed to a luggage carrier.