JPS6143621Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an automatic walking device for heavy goods transport vehicles.
More specifically, the present invention relates to a storage type walking device in which the walking board is stored on the underside of the deck.

In the conventional model, the footboard is free, and the worker has to pull it out from the bottom of the deck, carry it up to the hanging rod at the rear of the deck and hang it, and then do the reverse to store it. This not only placed a heavy burden on the workers, but also significantly degraded work efficiency, and there was even a risk of injury from dropping the footboards.

This invention solves the above problems all at once, and by simply pulling out the footboard stored on the bottom of the deck to the rear of the deck and then lifting it blindly, the upper surface of the front end of the footboard can be brought into contact with the deck surface. It is characterized by being set flush and being able to be easily stored without falling.

An example of implementation of the present invention will be described in detail below based on the drawings.

A is a general-purpose or dump loader or self-loader type heavy goods transport vehicle in which deck A ₁ tilts backward, and B is a walking device installed at the rear of the lower surface of deck A ₁ of the same transport vehicle A, and this walking device B The left and right rails _1, 1 extend in the front and back direction at the rear of the lower surface _A2 of the deck A1, and the left and right footboards extend freely and move parallel to the rails ₁ to the rear surface _A3 of the deck A1. 3, 3, the rear end of the arm part 20 is pivotally connected to the front end of the footboard 3, and the footboard 3 is moved along the rail 1 to the rear position where the footboard 3 is extended to the rear surface _A3 of the deck, and the footboard is extended. The movable body 2 is rotatable and can be moved upward by an arm 20 so that the front end upper surface 3a of the rotor 3 is flush with the deck surface a.

The left and right rails 1 are fixedly provided on the lower surface A ₂ of the deck A ₁ , and the left and right rail bodies 10, 10 of this rail 1 are parallel to each other at equal intervals, and their rear ends are connected to the storage opening on the rear surface A ₃ of the deck. It protrudes through A ₄ and guides the movable body 2 in the front-back direction, restricts the backward movement with a stopper 11 at the rear end of the rail body, and allows it to be guided so as to rotate freely in the same rear position.

In the movable body 2, the rollers 21, 21 at the left and right ends are connected to the outer rail surface 10 of the rail bodies 10, 10, respectively.
a, 10a, and the same outer rail surface 10
It can move forward and backward until it reaches a rear position where it is restricted by a stopper 11 at the rear end, and can freely rotate around the roller shaft 22 at the same rear position. In addition, the movable body 2 is provided with a support shaft 23 between the rear ends of the arm parts 20 and 20 extending rearward from both the left and right sides, and the front end of the footboard 3 can be freely adjusted and rotated left and right along the axis on this support shaft 23. A rail body 10 is provided at both ends of the shaft that penetrates to the outside of the arm part 20 in the area of the lower surface _A2 of the deck.
The movement is guided by the inner rail surface 10b at
At the A ₃ position on the rear surface of the deck, floating rollers 24, 24 are installed that come off the rear end of the open inner rail surface 10b and are supported by the guide plate 4.
Moves forward (when retracted) and backward (when extended) together with
In addition, in the rear position, the arm parts 20, 2 rotate around the roll shaft 22 (counterclockwise in the drawing).
0 crosses the vertical line of the axis of the roller shaft 22 from the rear and swings until it is stopped by the rear surface _A3 of the deck, and the front end upper surface 3a of the footboard 3 is raised to an upper position flush with the deck surface a. It has been made movable.

Therefore, the length of the arm portion 20, that is, the roller shaft 2
The distance between the two cores and the support shaft 23 is set so that the front end of the footboard 3 contacts the deck rear surface _A3 from above the guide plate 4, and the upper surface 3a of the front end is flush with the deck surface a. Further, the stopper 11 is positioned such that the center of the roller shaft 22 of the movable body 2 which rotates at the rear position is located behind the center of the support shaft 23 at the upper position of the footboard 3.

The front end of the footboard 3, which is reinforced with a metal plate 31, is connected to the support shaft 23 of the movable body 2, and the rear end is supported and guided by rollers 40 on the guide plate 4. Guided storage port A ₄
The rear end of the plate lands on the ground, and a subsequent lifting operation sets the front end of the plate flush with deck surface a, while lowering and pushing operations cause it to be retracted.

As described above, the present invention makes it possible to set the top surface of the front end of the board flush with the deck surface by simply lifting the step board blindly after pulling it out from the bottom surface of the deck, thereby significantly improving work efficiency. was completed.

When storing it, I was able to pull the footboard backwards to lower it and safely push it in without it falling on my feet.

Along with this, the footboards are stored on the underside of the deck while the vehicle is running, eliminating the fear of vehicles following behind, and allowing the footboards to be quickly set up to allow lifting and lowering of heavy objects such as bulldozers and power shovels. The work can be completed smoothly and safely by moving between the deck surface and the top surface of the step board without any steps.

[Brief explanation of the drawing]

FIG. 1 is a side view of a heavy goods carrier equipped with the walking device of the present invention. FIG. 2 is a partially enlarged perspective view with a portion cut away. FIG. 3 is an enlarged cross-sectional view, partially cut away, showing the footboard set flush with the deck surface. In the figure, A ₁ is the deck, a is the deck surface, A ₂ is the bottom surface of the deck, A ₃ is the rear surface of the deck, A ₄ is the storage port,
1,1 is the rail, 11,11 is the stopper, 2,
2 is a movable body, 20, 20 are arm parts, 3, 3 are footboards, and 3a, 3a are the upper surface of the front end.

Claims (1)

[Scope of utility model registration request] A pair of left and right rails are provided on both sides of the rear of the bottom of the deck in the front and back direction, and the rear ends of the rails are made to protrude rearward from the footboard storage opening on the rear of the deck, and movable bodies are attached to both rails from the bottom of the deck to the stoppers at the rear end of the rails. Each movable body is suspended so that it can be moved back and forth to the rear position where it is blocked, and the front end of the footboard is pivotally connected to the rear end of an upwardly swinging arm that extends behind each movable body. The upper surface of the front end is regulated by an arm section whose swing center is the movable body at the rear position, and is freely movable upward to an upper position where it aligns flush with the deck surface. Walking device for heavy goods vehicles.