JPS6358451B2 - - Google Patents

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 when the container is laid down, the rear door automatically closes. It is used in the field of rear door opening/closing devices for container transport vehicles.

<Conventional technology> In conventional container transport vehicles, the rear door of the container opened downward, so when dumping and discharging large objects such as scrap iron or rocks, they could get stuck in the rear door and be discharged. There is a problem that the loaded object may collide with the rear door and damage the rear door or its upper hinge.

<Problems to be Solved by the Invention> The present invention has been made to solve the above-mentioned problems, and is capable of smoothly and quickly discharging loaded items without damaging the rear door and its hinges. ,
The purpose is to automatically open the rear door with the dump truck 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 above object, the configuration of the present invention includes 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. In a container transport vehicle for dumping the container, the bottom of the rear door of the container is supported by a hinge so that the rear door can be opened upward, and the bottom of the container is A first link mechanism connects the pivoted first swinging arm and the rear door, and when dumping the container, the first swinging arm is guided and rotated in a direction to open the rear door. A first guide member is provided on the chassis side, and further includes a locking arm that is pivotally supported at a lower part of the container and can be locked to the first swinging arm, and a second swinging arm that is pivotally supported at the lower part of the container. a second movable arm with a dead point mechanism in the middle;
While connected via a link mechanism, a support member is provided on the chassis side to release the engagement state of the dead point mechanism when the container is dumped, and when the container is laid down, the dead point mechanism is The present invention is characterized in that a second guide member for rotating the second swinging arm in the direction of engagement is provided on the seat side.

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

In FIGS. 1 and 2, reference numeral 1 denotes a container, and a rear door 2 is pivotally attached to the rear end of the container by a pivot shaft 3 so as to be able to open and close upward.

4 is a chassis, and this chassis 4 is composed of a chassis frame 5 and a subframe 6 fixed on the chassis frame 5, and a dump frame 11, which will be described later, is attached to the rear end of the subframe 6 as a shaft. A supporting hinge portion 7 is formed, and a guide roller 9 is pivotally attached to this hinge portion 7 by a support shaft 8, and the main beams 10, 10 of the container 1 ride on the pair of left and right guide rollers 9, 9. Thus, the container 1 is guided and supported when it is loaded onto the chassis 4 side and when it is removed from the chassis 4 side.

Reference numeral 11 designates a dump frame whose rear end is pivotally connected to the sub-frame 6 on a support shaft of a hinge portion 7, and an intermediate frame 12 is pivotally connected to the tip of this dump frame 11 through 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 at a shaft 15, and has a hook 1 at the upper end of the tip arm 14.
6 is formed and is hooked onto a hooking member 17 protruding from the front wall of the container 1.

18 is a first hydraulic cylinder, which is connected to the intermediate frame 12;
The arm 14 is rotated about the shaft 15 from the orthogonal state to the bent state as shown in FIG.

Reference numeral 19 denotes a second hydraulic cylinder, whose base end is pivotally connected to the front part of the subframe 6, and whose tip is pivotally connected to a part of the intermediate frame 12 through a shaft 20. When the second hydraulic cylinder 19 expands and contracts, The intermediate frame 12 rotates around the shaft 13, and the first hydraulic cylinder 1
8, the arm 14 is bent with respect to the intermediate frame 12, and the container 1 can be placed on the chassis 4 side, or conversely detached to the ground side and lowered.

In addition, 21 is the dump frame 11 and the container 1.
It is an engagement/disengagement mechanism interposed between the bottom surface of the second
As shown in the figure, when the locking and disengaging mechanism 21 is switched to the locked state and the second hydraulic cylinder 19 is extended, the dump frame 11, intermediate frame 12, and container 1 are tilted together, and the loaded material is discharged in the dump state. is possible.

Next, in FIGS. 3 to 7, one embodiment of the rear door opening/closing device of the container 1 of the container transport vehicle described above is specifically shown.

As shown in FIG. 3, the side wall rear end 22 of the container 1
The rear door 2 is tilted so that the lower part is forward and the upper part is rearward, while the rear door 2 is tilted so that the lower part of the door 2 is tilted to the pivot shaft 3.
It is rotatably supported by the support member 1 and can be brought into close contact with the rear end 22 of the side wall.

Further, the deck plate 23 is tilted rearward and upward so that the rear end edge 23a is at the vertical midpoint height of the rear end surface of the container 1, and the pivot shaft 3 is arranged at the vertical midway height near the rear end edge 23a. be done. Furthermore, a triangular protruding piece portion 24 is formed on the rear door 2.

Further, a support shaft 42 is fixed to the lower part of the container 1, and brackets 40 and 41 having a constant phase angle are fixed to this support shaft 42. A rotating shaft 25 is provided at the tip of one of the brackets 41, and the first swinging arm 34 and rotating arm 35 are integrally fixed to this rotating shaft 25 with a phase of 180 degrees. A first roller 36 is provided at the tip of the first swing arm 34.

The tip of the rotary arm 35 is connected to the protruding piece 24 of the rear door 2 via the first link mechanism A,
The operation of the rotating arm 35, that is, the first swinging arm 34, and the opening and closing of the rear door 2 are linked. The first link mechanism A includes a link 26, a swinging member 27,
It consists of links 28. The center of the swinging member 27 is rotatably supported by a shaft 31 at the lower part of the container 1, and one end of the swinging member 27 and one end of the link 26 are rotatably supported by a pin 30. At the same time, the other end of the link 26 is connected to the protruding piece 2.
4 by a pin 29 so as to be rotatable. Also,
One end of a link 28 is rotatably connected to the other end of the swinging member 27 with a pin 32. On the other hand, the other end of the link 28 is rotatably connected to the tip of a rotating arm 35.

On the other hand, the bracket 4 fixed to the support shaft 42
0 is provided with a rotation shaft 39, to which the base of the locking arm 38 and one end of the arm 43 are fixed. The tip of the locking arm 38 is connected to the first
The swing arm 34 can engage with the shaft 37 of the first roller 36 at its tip. Further, one corner of the substantially triangular second swinging arm 60 is rotatably supported by a shaft 63 on a bracket 64 fixed to the lower part of the container 1 in front and below the support shaft 42 . A second roller 62 is provided at the other corner of the second swinging arm 60, and the tip of the arm 43 that rotates together with the other corner of the second swinging arm 60 and the locking arm 38. are connected by a second link mechanism B having a dead point mechanism 47 in the middle, and the locking arm 38 is interlocked with the operation of the second swing arm 60.
The second link mechanism B includes a link 44, a swing member 45, a link 46, a dead point mechanism 47, and a link 48 extending from the arm 43 to the second swing arm 60. The swinging member 45 is swingably attached at its center to a bracket 52 fixed near the rear end of the lower part of the container 1 via a shaft 51. One end of the swinging member 45 is rotatably connected to one end of the link 44 by a pin 50, and the other end of the link 44 is rotatably connected to the tip of the arm 43 by a pin 49. One end of the link 46 is connected to the other end of the swinging member 45 using a pin 53.
The other end of the link 46 is fixed to a dead point mechanism 47. One end of the link 48 is rotatably connected to the dead point mechanism 47 with a pin 59, while the other end of the link 48 is rotatably connected to another corner of the second swing arm 60 with a pin 61. ing. The dead point mechanism 47 has a roughly doglegged base 5.
5, a connecting portion 54 and a swing plate 56. A link 46 is provided at one end of the base 55.
The connecting portion 54 to which is fixed is integrally fixed. The other end of the base 55 is rotatably connected to the tip of an intermediate protrusion 56b among the three protrusions 56a, 56b, and 56c provided on the swing plate 56 by a pin 57. Further, a roller 58 is provided at the tip of the lower protrusion 56c of the swing plate 56, and one end of the link 48 is rotatably connected to the tip of the upper protrusion 56a by a pin 59. When the corner 56d of the swing plate 56 rotates counterclockwise above the center line of the link 46 shown by the dashed line in FIG. It has a mechanism that maintains the engagement.

On the other hand, the chassis 4 is provided with a first guide member 65. This first guide member 65 has a horizontal side portion 6
Concave arc portion 65 continuously formed in front of 5a
b, and the first roller 36 of the first swinging arm 34 is guided by rolling against it, and is rotated in the direction of opening the rear door 2 via the first link mechanism A.
Further, the chassis 4 is provided with a second guide member 67 in front of the first guide member 65. The upper surface of the second guide member 67 includes an inclined surface 67a that slopes upward from the rear end toward the front, and a horizontal surface 67b that continues in front of the inclined surface 67a. Furthermore, a support member 66 is provided at the rear of the support shaft 8 of the chassis 4, and a flat upper surface 66 of the support member 66 is provided.
A roller 58 of the dead point mechanism 47 can come into contact with the roller 6a. And container 1
When the roller 58 of the dead point mechanism 47 dumps around the support shaft 8, the upper surface 66 of the contact member 66
a, the swing plate 56 rotates clockwise around the pin 57, and the dead point mechanism 4
The engaged state of 7 is released. Note that 68 is a spring that is stretched between the container 1 and the link 46 and biases the link 46 rearward.

In the rear door opening/closing device configured as described above, when the container 1 is dumped, the container 1 tilts around the support shaft 8 as shown in FIG. As a result, the upper surface 66a of the contact member 66 presses the roller 58 of the dead point mechanism 47 upward, causing the swinging plate 56 to rotate clockwise around the pin 57, so that the swinging plate 56
The center of the corner 56d is located upward, and the engagement state of the dead point mechanism 47 is released. At the same time, the base 55 of the dead point mechanism 47 is displaced rearward, so the link 46 of the second link mechanism B...
The shaft 3 of the first roller 36 of the first swing arm 34 of the locking arm 38 via the swing member 45 and the link 44
7 is released. Then, as the container 1 tilts, the rear door 2 automatically begins to open while being regulated by the concave arc portion 65b of the first guide member 65 due to its own weight, and as shown in FIG. 5, when the dump angle reaches 16 degrees. , the first roller 3 of the first swinging arm 34
6 is separated from the concave arc portion 65b of the first guide member 65, and the downward restraint of the first roller 36 is released. At the same time, the deck board 23 and the rear door 2
becomes the same surface as the inner surface of Furthermore, when the dumping angle is increased, the container 1 is dumped with the rear door 2 flush with the deck board 23, as shown in FIG.

Conversely, when the container 1 is in a prone state, the second swinging arm 60 moves toward the second roller 62, as shown in FIG.
is rotated clockwise in the figure by the horizontal surface 67b of the second guide member 67, and the link 48 of the second link mechanism B is pulled forward. Therefore, the swing plate 56 of the dead point mechanism 47
is biased counterclockwise around the pin 57, and the dead point mechanism 47 is activated to be in a locked state. Then, the locking arm 38 is rotated counterclockwise via the link 46, the swinging member 45, the link 44, and the arm 43 of the second link mechanism B, and the first roller 36 of the first swinging arm 34 is rotated counterclockwise. It engages with the shaft 37 of. Therefore, the first swing arm 34 is prevented from swinging, and the rear door 2 is closed via the first link mechanism A.

Furthermore, whether the container 1 is mounted on the chassis 4 or unloaded from the chassis 4, the dead point mechanism 47 is in the engaged state as shown in FIG. engage,
The rear door 2 is maintained in a closed state via the first link mechanism A.

It should be noted that the present invention can be modified in design other than the above-described embodiment, and as shown in FIG. A contact member 68 that the second roller 62 of the second swinging arm 60 comes into contact with
may be provided.

Furthermore, the link 26 of the link mechanism A is used as a compression member when the rear door 2 opens, but as shown in FIG. In this case, the link 26 of the link mechanism A may be used as a tension member.

Further, as shown in FIG. 10, the first guide member 6
5 may be provided on the dump frame 11, and the link 26 may be used as a tension member when the rear door 2 is opened.

Alternatively, the link 26 of the link mechanism A may be directly attached to the shaft 37 as shown in FIG.

Furthermore, although the present invention is configured to mount the container 1 using the front arm 14, hydraulic cylinders 18, 19, etc., it can also be used for a type of container transport vehicle that uses a winch to pull up the container along a dump frame.

<Effects of the Invention> As described in detail, the present invention is capable of disengaging the dead point mechanism and opening the rear door upward when the container is loaded onto the chassis from the ground and dumped. Therefore, when dumping and discharging a large loaded object such as iron waste or rocks, the loaded object can be smoothly and quickly discharged without damaging the rear door or hinge section.

In addition, when the container is in the prone state, when the dead point mechanism is activated to lower the container from the top of the chassis to the ground, or when the container is loaded from the ground to the top of the chassis, the first swing arm is restrained by the locking arm. Since the rear door is restricted from rotating in the direction of opening the rear door, there is no possibility that the rear door of the container will open and the cargo will spill out.

[Brief explanation of the drawing]

Figures 1 and 2 are simplified side views for explaining the operation of the container transport vehicle, Figure 3 is a state diagram of an embodiment of the present invention when the container is mounted on the chassis, and Figure 4 is Figure 5 is a diagram showing the opening of the rear door relative to the dump angle. Figure 6 is a diagram of the state when the container is tilted to the maximum tilt angle. Figure 7 8 is a side view of another embodiment, and FIGS. 9, 10, and 11 are side views of other embodiments. 1... Container, 2... Rear door, 4... Shade,
7...Hinge, 11...Dump frame, 34...
...first swinging arm, 38...locking arm, 47...dead point mechanism, 60...second swinging arm, 65...
...First guide member, 66...Abutting member, 67...
Second guide member, A...first link mechanism, B...
Second link mechanism.

Claims (1)

[Scope of Claims] 1. 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 are integrally connected, and the container is dumped. In the container transport vehicle, the bottom of the rear door of the container is supported by a hinge so that the rear door can be opened upward, and the rear door is connected to a first swinging arm pivotally supported at the bottom of the container. A first guide member is provided on the chassis side to guide the first swing arm and rotate the rear door in a direction to open the rear door when the container is dumped. A locking arm that is pivotally supported at a lower part and can be locked to the first swinging arm, a second swinging arm that is pivotally supported at the lower part of the container, and a second link mechanism having a dead point mechanism in the middle. while providing an abutment member on the chassis side for releasing the engagement state of the dead point mechanism when dumping the container;
A container transport vehicle characterized in that a second guide member is provided on the chassis side for rotating the second swinging arm in a direction in which the dead point mechanism is engaged when the container is laid down. Rear door opening/closing device.