JPS6239984Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an improvement of the rear post of a three-sided loading box.

(Prior art) Some cargo boxes, such as dump trucks, have a rear sliding door that rotates around the lower part to open and also opens by rotating around the upper part.
Publication No.). In this case, so-called rear posts are provided on both sides of the rear end of the floor of the cargo box to support the upper fulcrum. Since this is fixedly installed, when the fan door is folded down and used as a so-called flat body, the rear post will protrude above the floor, which may obstruct work on the floor or cause trouble for workers. There were inconveniences such as players hitting the rear post and getting injured, or tripping over the rear post and falling.

(Purpose of the invention) This invention was made to eliminate these conventional drawbacks.The rear post can be moved up and down, and when it is not needed, it can be stored so that the rear post does not protrude above the floor. The structure is as follows.

(Structure of the invention) This invention is a rear post that supports the side sliding door and the rear sliding door of a three-sided loading box used as a loading platform for a vehicle, and the upper position supporting the sliding door and the upper end of the rear post are The rear post is slid up and down between the lower position where it is stored so as to be approximately at the same height as the loading platform, and the lower end of the rear post protrudes downward when the rear post is in the lower position. A post guide is provided on the loading platform, and a stopper member is provided inside the lower part of the rear post to engage with an engaging portion provided on the post guide to hold the rear post in the upper position. The upper end is in contact with the upper edge of the post guide,
A flange for holding the rear post in a lower position is provided, and an operating means connected to the stopper member to release the engagement is provided at the lower end of the rear post.

(Example) In Figures 1 to 4, 1 is the floor of the loading platform;
13 is a side fan door, and 14 is a rear fan door. The side fan door 13 and the rear fan door 14 are each connected to the side edge of the floor (loading platform) 1 by a hinge, and rotate around the hinge. It can then be opened as shown in FIG. A cylindrical post guide 12 is provided on both sides of the rear end of the floor 1, and a rear post 3 is fitted into the post guide so as to be movable up and down. Inside the rear post 3 is a pair of stoppers 5.
is arranged rotatably around a shaft 8, and the pair of stoppers (stopper members) 5 are connected to each other at a connecting portion 5a. That is, the pair of stopper members 5 have elongated holes 50 formed at their inner ends, and are connected to each other by the shaft 4 passing through the elongated holes 50.

The outer end of the stopper 5 projects outward from openings formed in the side wall of the rear post 3 and the side wall of the post guide 2, and the rear post 3 is held by the lower surface of the stopper 5 coming into contact with the post guide 2. That's what I do. That is, a support reaction force acts on the stopper 5 from the post guide 2, but the stopper 5 is only allowed to rotate around the shaft 8 attached to the rear post, and the inner ends of the stopper 5 are mutually connected to the shaft 4. Since they are connected together, their mutual rotation is restricted, and therefore the support reaction force is transmitted to the rear post 3. Further, a coil spring 80 is attached between the upper ends of the stopper 5, thereby applying a force in a direction that causes the stopper 5 to protrude outward. A hole 31 is formed in the bottom plate 30 of the rear post 3, and the push lever 6 attached to the shaft 4 passes through this hole 31 and projects downward. This push lever 6 is an operating means for the stopper 5 to release the rear post 3 from being held by the stopper 5.

A holder 7 is attached to the flange 34 at the upper end of the rear post 3, and an annular member 71 having an opening on one side is rotatably fitted into the holder 7.
An operating rod 70 extending outward from the opening of the holder 7 is attached to the annular member 71 . A groove 72 through which the base of the operating rod 70 passes is formed in the holder 7, and when the operating rod is rotated as shown by the arrow in FIG. 2, the opening of the annular member 71 matches the opening of the holder 7. After the stopper 9 of the rear fan door 14 is inserted through this opening, the operating rod 70 is returned to its original position, so that the rear fan door 14 can be held in an upright position.

In the above configuration, when the side fan door 13 and the rear fan door 14 are kept in the upright position, the rear post 3 is held in the upper position by the stopper 5 as shown by the solid line in the figure. In addition, when using it as a flat body, as shown in FIG. 1, after folding down the side fan door 13 and rear fan door 14, push up the push lever 6. As a result, the shaft 4 at the upper end of the push lever 6 is pushed up, and as the shaft 4 moves through the elongated hole 50, the stopper 5 rotates as shown by the imaginary line in FIG. I am drawn into it. When the stopper 5 is drawn into the rear post 3, the rear post 3 descends under its own weight, and is locked by the flange 34 coming into contact with the upper surface of the post guide 2, and is moved to the lower position as shown in FIG. Stored. In this state, the upper surface of the rear post 3 is approximately at the same height as the floor 1, and does not interfere with work on the floor 1. Also, when the push lever 6 is released, the upper ends of the stoppers 5 are drawn together by the coil spring 80, and the stoppers 5
again protrudes laterally.

In addition, in order to return the rear post 3 to the upper position again, it is sufficient to lift the rear post 3 to the upper position. As a result, the upper surface of the protruding portion of the stopper 5 is pushed by the lower surface of the post guide 2, and after retracting into the rear post 3, it protrudes again and returns to the state shown by the solid line in the figure, and is held in the upper position.

(Effects of the invention) As explained above, this invention allows the rear post to be stored by holding it with a post guide.Since the rear post can be stored with a simple operation, it is easier to work with a flat body. The rear post does not get in the way when doing so, which is very convenient.

Furthermore, since the operating lever is provided at the lower end of the rear post, the operating lever does not protrude above the loading platform when the rear post is stowed, making it easy to connect the operating lever to the stopper member. It is excellent.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a rear post showing an embodiment of this invention, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a cross sectional view thereof, and FIG. 4 is a side view of the rear post in a retracted state. 1...Floor, 2...Post guide, 3...Rear post, 5...Stopper, 6...Push lever, 13...Side fan door, 14...Rear fan door.

Claims (1)

[Scope of utility model registration request] A rear post that supports the side sliding door and rear sliding door of a three-sided loading box, the upper position supporting the sliding door and the lower position storing the rear post so that the upper end of the rear post is approximately at the same height as the loading platform. A post guide for sliding the rear post up and down between the rear post and the post guide is provided on the loading platform, and one of the rear post and the post guide engages with an engaging portion provided on the other to move the rear post upward. A plurality of stopper members are rotatably attached to hold the stopper members in position, and the stopper members are formed with connecting portions for connecting the respective stopper members to each other. An operating means for releasing the engagement is provided, further comprising a biasing member for biasing the stopper member into the engaged state, and a flange that abuts the upper edge of the post guide and holds the rear post in the lower position. A retractable rear post for a three-sided loading box.