JP5099513B2 - Dump truck rear bumper - Google Patents

Description

  The present invention relates to a rear bumper of a dump truck.

Dump trucks used for transporting conventional composites (road pavement asphalt composites) are transferred to asphalt finishers (equipment that spreads asphalt composites on the road), and the rear bumper hits the asphalt finisher, which prevents the bumper from getting in the way. Therefore, in large dump trucks, when transferring material, it is possible to secure a space where the bumper can move back and forth, so those with a device that moves the bumper can move without hitting it and keep it out of the way However, the equipment is complicated and the installation cost is high, and even with a medium-sized dump truck with a loading capacity of about 4 tons, there is no space to move even if you try to move it in the same way, and the bumper is in the way. It is the present situation that you can see that it is always removed. This is a poorly maintained vehicle that violates the Road Traffic Law. If the bumper is mounted on the upper side, people or objects may be stepped on the dump truck when the dump truck moves backward. Therefore, the height above the ground is regulated and it is prohibited to make it higher. However, the height of the asphalt finisher is around 50 cm, so the rear bumper hits the asphalt finisher and gets in the way. For this reason, many dump trucks carrying mixed materials often violate the Road Traffic Law by removing bumpers. Furthermore, the dump truck with a load capacity of about 4 tons is slightly higher than the height of the intake of the asphalt finisher, and the height of the chassis frame is lowered further. However, besides the asphalt finisher, when transferring the load to a hopper with a high ground, the bumper gets in the way and the current dump truck has many problems.
By the way, the literature to solve such a problem will be described. Actually, Japanese Utility Model Laid-Open No. 6-69021 and similar ones, especially in the middle-sized dump truck, the ground clearance of the vehicle body and the chassis frame is the transfer of the load of the asphalt finisher. Since the height of the replacement part is only slightly high, the stored bumper may be located under the chassis frame and hit the asphalt finisher or the hopper of the cargo receiver.
In JP-A-6-171444, the bumper moves forward and can move further upward, and a large dump truck can secure a sufficient height. However, when it is located under the body chassis frame, it is particularly about 4 tons. In medium-sized dump trucks, the bumper hits the asphalt finisher and cannot enter the asphalt finisher deeply. A bumper is sandwiched between the parts, and the loading platform does not tilt to the maximum.
In this way, some large dump trucks can somehow secure the bumper's ground clearance, but in the medium-sized 4-ton dump truck, the bumper cannot be moved under the chassis frame. If the overload prevention part and the loading platform are tilted, they are sandwiched between the loading frame and the chassis frame overfall prevention part and deformed, and cannot be moved there.

  The problem to be solved is to prevent the rear bumper from colliding with the asphalt finisher, so that the rear bumper does not collide with the asphalt finisher, and also when transferring the load to a hopper with a high ground, etc. To.

  For large and medium-sized dump trucks, when the bumper is moved upward, there is a slight gap between the rear part of the chassis frame and the overload prevention part and the carrier frame when the cargo bed is at the maximum tilt. Install and avoid bumps, or cut the chassis frame overfall prevention part so that it can be moved up and down by rotation, and if it is positioned above, the bumper is attached to the load frame so that it does not bump, When the bumper is positioned below and the material is transferred, the bumper can be positioned above.

  The rear bumper of the present invention meets the safety standards stipulated in the Road Traffic Law when driving on the road, and when driving on the road, the height from the ground is set to the prescribed height, and when transferring asphalt composites, etc. The rear bumper does not get in the way, it can be moved to a higher position, or it can be moved away from it by moving forward and backward, rotating, etc., enabling work and improving work efficiency. In a large dump truck, the apparatus is expensive, but the present invention is inexpensive and can solve the problems so far.

  The rear bumper of the present invention meets the safety standards stipulated in the Road Traffic Law when driving on the road, and when driving on the road, the height from the ground is set to the prescribed height, and when transferring asphalt composites, etc. The rear bumper does not get in the way, it can be moved to a higher position, or it can be moved by moving it back and forth or rotating, enabling work and improving work efficiency. Can solve the problems so far.

  An embodiment of the present invention will be described with reference to the drawings and reference numerals. FIG. 1 is a schematic diagram of the rear side of a normal dump truck, and 1 is the rear side of the dump truck. 6 is attached and the bumper 5 is attached there. The normal bumper cannot move the position, and the height from the road surface of the asphalt finisher shown in FIG. 2 is indicated by the arrow from the road surface 7 of the mixed material intake portion, but from the road surface 7 shown in FIG. The height of the bumper indicated by the arrow is not secured, and when the mixture is transferred to the asphalt finisher, the bumper 5 hits the asphalt finisher intake port, so the bumper is removed and operated, etc. There is a problem. Large dump trucks can secure a moving space, but medium-sized dump trucks with a size of about 4 tons have a serious problem because there is no place to move them.

  FIG. 3 shows a solution to this problem. Normally, the bumper is supported on the chassis frame 4A by the bumper rotating shaft 9 and the bumper stay 6 at the position indicated by the dotted line, as shown by the solid line. When the loading platform 2 is tilted to rotate upward and load is lowered, the maximum tilting of the loading platform frame C4 is shown by the dotted line in FIG. 3. However, in the chassis frame 4A, the overfall prevention portion, that is, the oblique portion of the chassis frame 4A. , There is a portion that prevents the loading platform frame 4C from coming into contact with the loading platform, and when the bumper is moved upward, the bumper is sandwiched and deformed between the chassis frame 4A and the loading platform frame 4C. Cannot move to. However, there is usually a gap between the chassis frame and the carrier frame as shown in the figure. 4A and 4B are diagrams in which the gap is utilized. FIG. 4A is a plan view of FIG. 4B, FIG. 4B is a cross-sectional view taken along the line AA of FIG. . First, the bumper is U-shaped, and a recess 10 is provided as shown in the figure. The chassis frames 4A and 4B are fitted into the recess 10 in the gap between the chassis frames 4A and 4B and the carrier frame 4C. If the bumper is connected at the hatched portion shown in FIG. Although the gap is narrow, an iron plate with a considerable thickness can be used, so that sufficient strength can be secured. However, if the material is further increased, the strength can be further increased. The thickness of the iron plate may be increased by scraping the chassis frame or the carrier frame to increase the gap.

FIG. 5A is a simplified view of the chassis frame, bumper, and the like as viewed from the rear. The bumper 5 located below is shown on the outer portion of the chassis frame 4 in FIG. In this way, since the recess 10 is between the bumper stay 6 and the bumper stay 6, the strength of the bumper is easily received even if the bending strength of the recess is small. Kept. FIG. 6 (b) shows the bumper stay 6 inside the chassis frame 4. In such a case, it is necessary to make the recess 10 strong, and as described in the above 008, the steel plate has sufficient strength. Secured.
In FIG. 6, the rotation shaft 9 and the bumper stay 6 may be fixed with pins 11, any number of pins may be used, and any number of pin holes may be used so that the bumper is positioned appropriately.

  FIG. 7 is a simplified view of the vicinity of the rotating shaft 9 when the bumper 5 is positioned below. The convex portion 12 shown by hatching is integrated with the chassis frame 4A, and on the side where the bumper stay 6 is attached. The bumper stay 6 is provided with an abutting portion 13 as shown in the figure, and the convex portion 12 and the abutting portion 13 are in contact as shown in the figure. The bumper 5 does not rotate any further, and if the pin 11 is inserted as shown in FIG. 6 in this state, the position of the bumper does not move. Of course, these may be rotated and moved by hydraulic or electric methods. By doing this, the frame and other parts of the dump trucks that have been built so far can be used without much modification. It is cheap because it can comply with the traffic law regulations, and it can provide an inexpensive movable bumper not only for medium-sized dump trucks such as 4 tons but also for large dump trucks. However, the present invention has been described with reference to the figure in which the bumper provided with the concave portion is rotated and moved. However, it is most important that the present invention has a recess in the bumper.

  Simplified rear view   Simplified diagram of asphalt finisher   Bumper simplified diagram   Rear surface measurement and plan view of bumper part   Illustration of bumper stay and convex contact   Illustration of pins that determine the position of Pampa   Stopper stop stopper

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Whole vehicle body 2 Loading platform 3 Loading platform rotating shaft 4 Frame 5 Bumper 6 Bumper stay 7 Subbase 8 Asphalt finisher 9 Rotating shaft 10 Recess 11 Pin 12 Protruding portion 13 Contact portion

Claims (2)

  The chassis has a chassis frame and can be tilted, has a loading platform with a frame, has a bumper with a recess at the rear, and uses the chassis frame and the loading platform frame to tilt the loading platform When the dump truck is configured to prevent overfall by bringing the load platform or the load frame into contact with the chassis frame, the bumper is placed on the chassis frame in the vicinity of the over fall prevention portion. A bumper for a dump truck, wherein the bumper recess is moved and fitted into the chassis frame.   In a dump truck having a chassis frame on the vehicle body, which can be inclined, and provided with a frame and having a bumper on the rear, the rear of the chassis frame is shaved, or the rear of the cargo bed frame is shaved, Alternatively, a bumper for a dump truck, wherein a rear part of the chassis frame and a rear part of the cargo bed frame are cut so that the bumper can be moved and fitted into the cut part.

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