JP3125514U - Large bumper rear bumper - Google Patents

Abstract

The present invention provides an inexpensive rear bumper for a large dump truck that can be operated without being removed from the large dump truck when the large dump truck is combined with an asphalt finisher.
SOLUTION: A rectangular outer cylinder 2 having both ends open, and rectangular inner cylinders 3 and 3 that are slidably provided at both ends of the rectangular outer cylinder 2, respectively. Provided is a rear bumper 1 of a large dump truck 21 to which joining members 4 and 4 for joining to brackets 23 and 23 extending from the vicinity of the rear end portion of the large dump truck main body 22 are fixed. The rectangular outer cylinder 2 is formed in a rectangular cylinder having an outer diameter of 106 to 136 mm and a width of 75 to 85 mm, and the rectangular inner cylinder 3 has an outer diameter of 100 to 130 mm and a width of 70 to 80 mm. It is formed in a rectangular cylinder.
[Selection] Figure 3

Description

  The present invention relates to a rear bumper of a large dump truck that can be operated without being removed from the large dump truck when the large dump truck and the asphalt finisher are combined.

For large dump trucks, the installation of a rear bumper is required by law to prevent entry in a rear-end collision, and its length and shape are also specified.
For example, if the length is 60% or more of the width of the vehicle, and the vehicle has a gross vehicle weight of 7 t or more, the height of the cross section is 100 mm or more and the outermost edge of the plane portion is the outermost wheel of the rear axle. It is determined that the distance is within 100 mm inside.
The rear bumper of a large dump truck has greatly contributed to reducing the damage caused by a rear-end collision.

  However, depending on the actual usage of the user, the rear bumper of the large dump truck comes into contact with the hopper of the asphalt finisher and surrounding equipment, such as when working with a combination of a large dump truck and asphalt finisher, such as road paving work, etc. There was inconvenience that the rear bumper had to be removed.

Therefore, for example, Patent Document 1 provides a work vehicle including a rear bumper that retracts a rear bumper erection device of the work vehicle toward the front side of the chassis such that the ground height increases.
Japanese Patent Laid-Open No. 10-24787

  As mentioned above, when combining large dump trucks and asphalt finishers, such as road pavement construction, the rear bumper of the large dump truck contacts the asphalt finisher hopper and surrounding equipment, so you must remove the rear bumper each time. An inconvenience occurred.

  Patent Document 1 solves the inconvenience described above, but requires a bending link mechanism, a moving device, and the like, and has a problem that the cost is relatively high.

  In view of the above situation, an object of the present invention is to provide an inexpensive rear bumper of a large dump truck that can be operated without being detached from the large dump truck when the large dump truck and the asphalt finisher are combined.

In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is composed of a rectangular outer cylinder with both ends open and a rectangular inner cylinder that is slidably provided at both ends of the rectangular outer cylinder. The present invention provides a rear bumper for a large dump truck, characterized in that a joining member for joining to a bracket extending from the vicinity of the rear end of the large dump truck body is fixed.

  According to a second aspect of the present invention, the rectangular outer cylinder is formed in a rectangular cylinder having outer dimensions of 106 to 136 mm and a width of 75 to 85 mm, and the rectangular inner cylinder has an outer dimension of 100 to 130 mm and a horizontal dimension. 2. The rear bumper of a large dump truck according to claim 1, wherein the rear bumper is formed in a rectangular cylinder of 70 to 80 mm.

  The invention according to claim 3 is provided with a holding member for holding sliding between the rectangular outer cylinder and the rectangular inner cylinder at a predetermined position. A rear bumper is provided.

  According to the invention described in claim 1 of the present invention, the rectangular outer cylinder is composed of a rectangular outer cylinder having both ends open and a rectangular inner cylinder slidably provided at both ends of the rectangular outer cylinder. A large bumper rear bumper is attached to the brackets extending from the vicinity of the rear end of the main body of the large dump truck. An inexpensive rear bumper for a large dump truck that can be operated without removing it from the large dump truck at the time of work can be provided.

  According to the invention described in claim 2, the rectangular outer cylinder is formed in a rectangular cylinder having outer dimensions of 106 to 136 mm in length and 75 to 85 mm in width, and the rectangular inner cylinder has an outer dimension of 100 to 130 mm in length. Since it is formed in a rectangular cylinder having a width of 70 to 80 mm, in addition to the effect of the invention of claim 1, it contributes to the reduction of damage at the time of rear-end collision and does not become an obstacle at the time of wearing, running, working, etc. Size and shape can be secured.

  According to the invention described in claim 3, since the holding member that holds the sliding between the square outer cylinder and the square inner cylinder at a predetermined position is provided, the effect of the invention according to claim 1 or 2 is achieved. In addition, the square inner cylinder is held at a predetermined position, and an unexpected expansion and contraction operation of the square inner cylinder can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
FIG. 1A is a front view of an extended state of a rear bumper of a large dump truck according to the present invention, FIG. 1B is a plan view of an extended state of a rear bumper of a large dump truck according to the present invention, and FIG. FIG. 1D is a side view of the rear bumper of the large dump truck according to the present invention, and FIG. FIG. 2 shows a large dump truck, and shows a state where the loading platform of the large dump truck is inclined and a part of the hopper of the asphalt finisher by a two-dot chain line.

  1A, 1B, and 1C, reference numeral 1 denotes a rear bumper of a large-sized dump truck according to the present invention. The rear bumper 1 includes a square outer cylinder 2 that is open at both ends, and a square outer cylinder. 2, which are slidably provided at both ends, respectively, near the outer periphery of both ends of the square outer cylinder 2, from the vicinity of the rear end of the large dump truck main body 22 shown in FIG. The joining members 4 and 4 for joining to the brackets 23 and 23 extending toward the upper side are extended upward and fixed.

  The rectangular outer cylinder 2 is formed in a rectangular cylinder having outer dimensions of 106 to 136 mm and width of 75 to 85 mm, preferably 131 mm and 80 mm, and the rectangular inner cylinder 3 has an outer dimension of 100 It is formed in a rectangular tube having a width of ˜130 mm and a width of 70 to 80 mm, preferably a length of 125 mm and a width of 75 mm. The length of the rear bumper 1 is such that when the rear bumper 1 is in the extended state, the outermost edge of the rear bumper 1 is up to 100 mm inside the outermost wheels 25 and 25 of the rear axles of the large dump truck 21 in accordance with laws and regulations. Set to be between. In addition, the thickness of the said square outer cylinder 2 and the square inner cylinder 3 is set to a dimension suitably.

The outer dimensions of the rectangular outer cylinder 2 and the rectangular inner cylinder 3 are dimensions that are suitable for securing the size and shape that contribute to the reduction of damage in the event of a rear-end collision. It is a suitable dimension.
In other words, the maximum dimensions ensure a size and shape that contributes to reducing damage in the case of a rear-end collision, and they do not interfere with other peripheral equipment and traveling of large dump trucks when installed, and are combined with work equipment. However, the minimum size is the minimum size that will ensure the size, shape, and strength that will contribute to the reduction of damage in rear-end collisions and that will also comply with laws and regulations. It is a size.

  In addition, bolts 5 and 5 as holding members for holding the sliding between the rectangular outer cylinder 2 and the rectangular inner cylinders 3 and 3 at predetermined positions are opened at the upper outer periphery in the vicinity of both ends of the rectangular outer cylinder 2. The screw 5 is screwed into a screw hole (not shown), and the bolt 5 is screwed to press the square inner cylinder 3 to restrict the movement of the square inner cylinder 3. The bolts 5 and 5 may be provided in the screw holes by opening screw holes in the lower part or the side of the outer periphery in the vicinity of both ends of the square outer cylinder 2. Further, the holding member is not limited to a bolt, and any other member may be used as long as it can hold the sliding between the rectangular outer cylinder 2 and the rectangular inner cylinder 3 at a predetermined position, such as a detachable pin. Alternatively, a holding locking portion may be formed on the square outer cylinder 2 and the square inner cylinder 3.

The joining member 4 is a flat plate fixed in the vicinity of both ends of the rectangular outer cylinder 2, and bolt insertion holes 6 and 6 are opened.
As shown in FIG. 2, the joining member 4 is screwed to a rear end portion of a bracket 23 that extends rearward and downward from a lower portion near the rear end of the large dump truck main body 22. The mounting height of the rear bumper 1 is set so that the lower surface of the rear bumper 1 is about 550 mm from the ground, for example.

  Thus, the rear bumper 1 is attached to the brackets 23, 23 of the large dump truck 21, and the rear bumper 1 is extended as shown in FIG. In this state, the large dump truck 21 can run or be inspected.

  When the large dump truck 21 to which the rear bumper 1 is attached works in combination with a work machine such as the asphalt finisher 31, the bolts 5, 5 of the rear bumper 1 are loosened, and the left and right square inner cylinders 3 3 is slid in the direction of the square outer cylinder 2, the rear bumper 1 is contracted as shown in FIG. 1 (d), the bolts 5 and 5 are tightened, and the square inner cylinders 3 and 3 are The mold outer cylinder 2 is held.

  FIG. 2 shows the large dump truck 21, and shows a work state in which the loading platform 24 of the large dump truck 21 is inclined by the two-dot chain line and the asphalt mixture in the loading platform 24 is transferred to the hopper 32 of the asphalt finisher 31.

  The rear bumper 1 of the large-sized dump truck according to the present invention is formed to have a predetermined size and is extendable so that the hopper 32 of the asphalt finisher 31 and other various instruments (not shown) can be used during such operations. To avoid damaging them.

  FIG. 3A shows a case where the rear bumper 1 of the large dump truck of the present invention is in the extended state. As described above, the length of the rear bumper 1 is set such that when the rear bumper 1 is in the extended state, the outermost edge of the rear bumper 1 is 100 mm inside the outermost side of the wheel 25 of the rear shaft of the large dump truck 1 in accordance with laws and regulations. It is set to be between.

  A two-dot chain line in FIG. 3A shows a cross section of the inner surface of the hopper 32 of the asphalt finisher 31. In this case, the inner surface of the hopper 32 interferes with or contacts both ends of the rear bumper 1. Yes.

  Therefore, when the large dump truck 1 performs the combination work with the asphalt finisher 31, the square inner cylinders 3, 3 of the rear bumper 1 are slid into the square outer cylinder 2 as shown in FIG. Then work with the rear bumper 1 contracted.

When the rear bumper 1 is in a contracted state and combined with the asphalt finisher 31, the rear bumper 1 does not interfere with or contact the hopper 32 of the asphalt finisher 31, and the hopper 32 is not damaged.
Further, by bringing the rear bumper 1 into the contracted state, the rear bumper 1 does not interfere with other equipment and members of the asphalt finisher 31 and does not damage them.

  That is, the rear bumper 1 can be operated without damaging the hopper 32 of the asphalt finisher 31 and other equipment and members of the asphalt finisher 31, so that it is not necessary to remove the rear bumper 1 before the operation as in the conventional example. In addition, since the work of sliding the rear bumper 1 to extend and contract the rear bumper 1 to a predetermined length and the work of holding the rear bumper 1 to a predetermined length are easy, work efficiency can be improved.

  The rear bumper 1 is not limited to the combination work with the asphalt finisher 31, and the work is performed without damaging the parts, equipment, etc. of other work machines even when working with other work machines. be able to.

  The rear bumper 1 has been described as being attached to the large dump truck 21. However, the rear bumper 1 may be provided in another work machine, and the same effect can be expected.

(A) It is a front view of the extended state of the rear bumper of the large-sized dump truck by this invention. (B) It is a top view of the expansion | extension state of the rear bumper of the large sized dump truck by this invention. (C) It is a side view of the rear bumper of the large-sized dump truck by this invention. (D) It is a front view of the contraction state of the rear bumper of the large-sized dump truck by this invention. It is a side view of the large-sized dump truck which attached the rear bumper by this invention. (A) It is a rear view of the large-sized dump truck which attached the rear bumper by this invention and extended the rear bumper. (B) It is a rear view of the large-sized dump truck which attached the rear bumper by this invention and contracted the rear bumper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear bumper 2 Square type outer cylinder 3 Square type inner cylinder 4 Joining member 22 Large dump truck main body 23 Bracket

Claims (3)

  It consists of a square outer cylinder that is open at both ends, and a square inner cylinder that is slidably provided at both ends of the square outer cylinder. A rear bumper for a large-sized dump truck, characterized in that joining members for joining to brackets extending from the vicinity are respectively fixed.   The rectangular outer cylinder is formed in a rectangular cylinder having an outer diameter of 106 to 136 mm and a width of 75 to 85 mm, and the rectangular inner cylinder is a rectangular cylinder having an outer diameter of 100 to 130 mm and a width of 70 to 80 mm. The rear bumper of a large-sized dump truck according to claim 1, wherein the rear bumper is formed as follows. The rear bumper of a large-sized dump truck according to claim 1 or 2, further comprising a holding member that holds sliding between the rectangular outer cylinder and the rectangular inner cylinder at a predetermined position.

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