JPS6164547A - Device for opening and closing rear door of container transport vehicle - Google Patents

Abstract

PURPOSE:To prevent a rear door and its hinge section from being damaged by allowing the rear door to be opened upward when containers carried on a chassis are dumped. CONSTITUTION:When a container 1 is loaded from a rear side of a chassis, a roller 27 is moved from a receiving member 33 to a guide member 31 allowing the receiving member 33 to come in contact with the rear surface 31b of the guide member 31 After being guided to a long hole 32, the receiving member moves from the front section to the rear one of the long hole 32. As in the case of unloading the container 1 on the ground, the configuration of a link mechanism A stays unchanged preventing the rear door 2 from being opened. When the container 1 is dumped, the roller 27 comes apart from the guide surface 31A of the guide member 31. This causes the downward restriction of the roller 37 to be released allowing the rear door 2 to be opened by its own weight.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention automatically opens the rear door of a container transport vehicle when the container is dumped, and further automatically opens when the container returns from the dump position to the prone position. It is used in the field of rear door opening/closing devices for container transport vehicles whose rear doors are closed.

Conventional technology> In conventional container transportation, the rear door of the container was opened downward, so when dumping and discharging large loads such as waste materials and rocks, There are problems in that the rear door (-) makes it difficult to eject, or that the loaded object collides with the rear door and damages the rear door or a portion of its hinge.

<Problems to be Solved by the Invention> The present invention has been made in order to solve the problems mentioned in -1-1. The purpose is to automatically open the rear door when the cargo is discharged and dumped, and to automatically close the rear door when the container is removed from the chassis side. .

<Means for Solving the Problems> In order to achieve the object described in 1., the present invention is characterized by a dump frame that rotates around a hinge provided at the rear of the chassis, and a dump frame that is mounted on the chassis as appropriate. In the container transport vehicle, which is configured to dump the container by connecting the containers loaded thereon in a single line by a means, the bottom of the rear door of the container is supported by a hinge part, so that the container can be opened and closed freely, and The rear door and the lower part of the container are connected by a bendable link mechanism, a roller is provided in this link mechanism, and a long hole is provided in the lower part of the container that extends approximately in the front-rear direction, and the receiving member is inserted into this long hole in the front-rear direction. A guide member is provided on the chassis side, the guide member being fitted to the chassis so as to be movable and protruding in the lateral direction, the guide member having a guide surface for restraining downward displacement of the roller, and a rear surface against which the receiving member comes into contact; Furthermore, an abutting member is provided on the chassis side or the dump frame side so as to be positioned rearward from the guide member and for abutting against the rear surface of the receiving member to move the receiving member forward in the elongated hole, When mounting the roller onto the chassis from the rear of the chassis, the receiving member contacts the rear surface of the guide member and the roller moves from the receiving member to the guide member. When lowering the container from the top of the chassis onto the ground, when lowering the container from the top of the chassis onto the ground, The roller contacts the abutting member and moves from the guide member to the receiving member, and the receiving member and the guide member restrict the downward displacement of the roller. 11- The rotation of the rear door in the opening direction is restricted.

<Example> Embodiments of the present invention will be described based on the drawings.

In Figures 1 and 2, 1 is a container with a rear door 2 at the rear end.
is pivotally mounted on a pivot shaft 3 so that it can be opened and closed in two directions.

4 is a chassis, and this chassis 4 includes a chassis frame 5 and a subframe 6 fixed on this chassis frame 5.
The rear end of the sub-frame 6 (hereinafter referred to as a hinge part 7 which pivotally supports a dump frame 11 to be described later) is formed, and a guide roller 9 is pivotally attached to this hinge part 7 by a support shaft 8. , the main girders 10 and 10 of the container 1 are placed on the pair of left and right guide rollers 9, and the chassis 4 of the container 1 is
．． It is guided and supported when it is mounted on the ill and when it is removed from the chassis 4 side.

Reference numeral 11 designates a dump frame in which a rear door is pivotally connected to a subframe 6 on a pivot of a hinge portion 7, and an intermediate frame 12 is pivotally connected to the tip of this dump frame 11 on a shaft 13. There is.

Reference numeral 14 denotes an L-shaped front arm, which is pivotably connected near the tip of the intermediate frame 12 with a pongee 15, and a hook 16 is formed at the upper end of the tip arm 14, and a hook 16 is formed at the upper end of the tip arm 14. It is hooked onto a hooking member 17 protruding from the front wall.

Reference numeral 18 denotes a first hydraulic cylinder which rotates the arm 14 around the pongee 15 with respect to the intermediate frame 12 to operate from the orthogonal state to the bent state as shown in FIG.

Reference numeral 19 denotes a second hydraulic cylinder 19, whose base end is pivotally connected to the front part of the subframe 6, and whose tip is connected to the intermediate frame 12 with a pongee 20.
The intermediate frame 12 is pivotally connected to a part of the second hydraulic cylinder 1≦], and the intermediate frame 12 moves around the second hydraulic cylinder 1≦.
1) When the above-mentioned arm 14 is moved to the middle 116 feet 1), the container 1 is mounted on the chassis 1 side. It's a good thing.

By the way, reference numeral 21 is an L1 member 11jl interposed between the Danbufu t'ztll and the bottom of the container 1, and as shown in FIG.
If the i+IIIE cylinder 11j is extended, the dump frame 11 and the intermediate][/-mu 12 and the container 1 tilt towards the body]2, and the dump state and 1. It is possible to extract the loaded material.

Next, FIGS. 3 to 7 specifically show an example of the rear door opening/closing device of the container 1 of the container transport vehicle described above.

The top rear door 2 shown in FIG.
Thereafter, the door 2 can be opened and closed around a pivot shaft 3 that supports the lower part of the door 2.

In addition, the deck plate 23 is tilted so that the rear end edge 23a is -11 in 1 of the rear end surface of the container 1.
6 in height, and therefore the pivot shaft 3 is disposed near it at a lower intermediate height. Further, a triangular protruding piece portion 24 is formed on the rear JJy2.

The link mechanism l\ that connects the co-moving shaft 25 provided at the lower part of the container 1 and the protruding piece 24 indicated in -1- is composed of a rotating arm 41, a swinging arm 26, and a link 28, and the rotating arm 41 One end of the rotating arm 41 is attached to the rotating shaft 25, and the tip of the rotating arm 41 is rotatably connected to one end of the swinging arm 26 with a pin 21]. The other end of the swinging arm 26 is connected to a pin 4.
The link 28 is rotatably connected to the bow at 2, and the other end of the link 28 is connected to the protruding piece 24 of the rear door 2 with a pin 30. Furthermore, the pin 4 of the connecting portion between the swing arm 26 and the link 2)
2 is provided with a roller 27. In addition, a long hole 32 extending substantially in the front-rear direction is bored in the lower part of the container 1,
As shown in FIG. 1, a receiving member 33 is fitted into this elongated hole 32 so as to be movable in the front and back direction and protrude laterally. The upper surface of this receiving member 33 is in contact with the roller 27: (3B
is formed flat. On the other hand, on the subframe G on the side of the chassis 4, a guide member 31 is provided on the 111 side holding the 11U recording member R1t+ (33), and a contact member: (4) is provided on the rear side.This guide member:) On the -1- side of 1, a guide surface 31A on which the roller 27 contacts is formed flat, and a rear surface 31B on which the receiving member 3:) contacts is formed. −
The front surface 24A of the connecting member 34 is formed at a height that allows the receiving member 33 to come into contact with it.

In the rear door opening/closing device configured as described above, as shown in FIGS. 3 and 5, when the container 1 is lowered onto the ground from the chassis 4F, the container 1 separates from the chassis 4F. Accordingly, the rear surface 33A of the receiving member 33 is
4, the receiving member 33 is placed above the elongated hole 32,
It is guided by the lower wall and moves from the rear end of the long hole 32 to the front end. At this point, the roller 27 moves from the guide surface 31A of the guide member 31 to the second surface 33B of the receiving member 33. therefore,
At this time, in the link mechanism A, the roller 27 is connected to the guide member 31.
The upper surface 31A and the receiving member 33 are restrained from moving downward, and the relative relationship between the swinging arm 26 and the link 28 is maintained constant, so the shape shown by the solid line in FIG. The rear door 2 remains closed.

Conversely, when the container 1 is loaded from the rear of the chassis 1, the rollers 27 move from the receiving member 33 to the guide member 31, contrary to the above, and the receiving member 33 comes into contact with the rear surface 31B of the guide member 31. is guided through the elongated hole 32 and moves from the front end of the elongated hole 32 to the rear end (1.
opening is prevented.

Next, when dumping the container 1, the container 1 tilts as shown by the two-dot chain line in Fig. j), and the roller 27 moves away from the guide surface of the guide member 31; The downward restraint is released. As a result, the rear door 2 automatically opens due to its own weight. Then, as shown in FIG. are the same plane.

In addition to the embodiment described in -1-, the present invention also includes a design change in which one end of the swinging arm 26 in the outer link mechanism A is supported by a pin 29 and a shaft 25 via a rotating arm 11 at the lower part of the container 1. Alternatively, as shown in FIG. 8, the swing arm 36 may be rotatably supported at the lower part of the container 1 by a pin 37 at its center. In this case, the roller 38 is the swinging arm 3G.
The other end is provided at the free end of the
It is rotatably connected to the link 28.

In addition, although the abutment member 34 is attached to the subframe 6, shafts 1 and 1 of the shaft frame 11
You can also put it directly on the side.

Further, the present invention also provides a tip arm 1, a hydraulic cylinder 1) i,
It can also be used for a container transport vehicle of a dump truck, in which the container 1 is loaded by the 1!3 etc., or the container is pulled along the dump frame by the wiener.

<Effects of the Invention> As described in detail of the present invention, the container is placed on the ground-I-
When loading the container on the chassis L-, the container is dumped.
Since the rear door is hltfH', when dumping and discharging a large load such as iron scrap or rocks, the load can be discharged smoothly and quickly without damaging the rear door or pin part. .

In addition, especially when lowering a container from the chassis to the ground, the rollers of the link mechanism move from the guide surface of the guide member to the upper surface of the receiving member, maintaining a constant relative relationship between the swing arm and the link. Since the door can be securely closed, when the container is loaded from the ground to the chassis, the rear door of the container will not open and the cargo will not spill out.

[Brief explanation of drawings]

1 and 2 are simplified side views for explaining the operation of the container transport vehicle, FIG. 3 is a side view showing an embodiment of the present invention, FIG. 4 is a sectional view of FIG. 3, and FIG. The figure shows the outside state when the roller is on the support member, Figure 6 is a sectional view of Figure 5, Figure 7 is a diagram showing the opening degree of the rear door with respect to the dump angle, and Figure 8 is the other state. FIG. 9, which is an enlarged view of the main part of the embodiment, is a view taken along the arrow E in FIG. DESCRIPTION OF SYMBOLS 1... Container, 2... Rear door, 4... Chassis, 7... Hinge l, 11... Dump frame, 25... First swing arm, 27... Roller, 31 ... Guide member, 31 A ... Guide surface, 31B ... Rear surface, 32 ... Long hole, 33
...Receiving member, 33 A... Rear surface, 34... Contact member, A... Link mechanism.

Claims (1)

[Claims] (1) A container transport vehicle configured to dump the container by integrally connecting a dump frame that rotates around a hinge provided at the rear of the chassis and a container mounted on the chassis by appropriate means. The bottom part of the rear door of the container is supported by a hinge part so that it can be opened and closed upwardly, the rear door and the lower part of the container are connected by a flexible link mechanism, and a roller is provided in this link mechanism, and A long hole extending approximately in the front-back direction is provided in the lower part of the container, and the receiving member is fitted into the long hole so as to be movable in the front-back direction and protrude laterally, while restraining the downward displacement of the rollers. A guide member having a guide surface and a rear surface on which the receiving member abuts is provided on the chassis side, and further, the guide member is provided on the chassis side or the dump frame side and abuts on the rear surface of the receiving member so that the receiving member is inserted into the elongated hole. When the container is mounted onto the chassis from the rear of the chassis by providing an abutment member that moves forward so as to be located at the rear of the guide member, the receiving member abuts the rear surface of the guide member and the roller moves from the receiving member to the guide member, the receiving member and the guide member restrict the downward displacement of the roller, and the rotation of the rear door in the opening direction is restricted via the link mechanism. When the container is lowered from the chassis onto the ground, the rear surface of the receiving member contacts the abutting member and the roller moves from the guide member to the receiving member, and the receiving member and guide member move the rollers. A rear door opening/closing device for a container carrier, characterized in that downward displacement is restricted and rotation of the rear door in the opening direction is restricted via the link mechanism.