JPH026659B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a container loading/unloading vehicle used for transporting containers.

<Prior Art> Conventionally, as shown in FIG. 7, a container loading/unloading vehicle has a chassis frame 1, a subframe 6 fixed on the chassis frame 1, and a rear end portion of the subframe 6. A dump frame 2 is pivotally supported at the tip of the dump frame 2, an L-shaped cargo handling arm 4 is pivotally supported at the tip of the dump frame 2, and a hydraulic cylinder 5 for rotating the cargo handling arm 4 back and forth is attached to a subframe 6.
It is known that the dump frame 2 is further provided with an engagement arm 11 that engages and disengages from the hanging piece 9 of the container 8. Then, the container loading/unloading vehicle releases the engagement between the engaging arm 11 and the hook 9, extends the hydraulic cylinder 5, and performs the loading/unloading operation of the container 8.

However, in the container loading/unloading vehicle mentioned above,
As shown in FIG. 7, when unloading the container 8 on a slope where the front slopes downward, the point of contact between the hook 4a at the tip of the cargo handling arm 4 and the latching member 12 of the container 8 is at a point A in the front. When the container 8 is moved and the hydraulic cylinder 5 is extended to unload the container 8 and the cargo handling arm 4 is rotated rearward, a counterclockwise direction from the container 8 acts on the hook 4a at the tip of the cargo handling arm 4. Due to the moment, the joint point B is lifted, the dump frame 2 is rotated clockwise, and when the dump frame 2 floats a certain amount and the container 8 becomes approximately horizontal, the container 8 moves counterclockwise to the cargo handling arm 4. As the surrounding moment ceases to act, the dump frame 2 suddenly falls, the cargo handling arm 4 suddenly rotates backwards (counterclockwise), and the container 8 suddenly moves backwards, resulting in a very dangerous situation. There is a problem that occurs. Therefore, in order to avoid the above-mentioned dangerous situation, the inventor of the present invention has proposed that even if the container 8 is unloaded on a slope where the front side is lowered, the dump frame 2 will not float up and fall suddenly. A container loading/unloading vehicle capable of safely and smoothly unloading a container 8 without dropping it suddenly is proposed.

As shown in FIGS. 5 and 6, this container loading/unloading vehicle includes a dump frame 22 at the rear end of a subframe 20, an L-shaped cargo handling arm 24 pivotally supported on the dump frame 22, and a container 8. A hook 26 is rotatably supported on the dump frame 22, and a pin 28 is provided on the side of the chassis frame 21 corresponding to the hook 26. The hook 26 and the engaging arm 25 are connected by a connecting member 29.

When unloading the container 8, the engagement arm 25 of the dump frame 22 and the hanging piece 9 of the container 8 are connected.
At the same time as the engagement with the engagement arm 25 is released, the engagement arm 25
The hook 26 of the dump frame 22 is automatically engaged with the pin 28 on the chassis frame 21 side through the connecting member 29 connected to the dump frame 22, and the dump frame 22 is connected to the chassis frame 21 side via the hook 26. . Therefore, even if the container 8 is unloaded on a slope where the front side is lowered and a moment is applied from the container 8 to the L-shaped cargo handling arm 24 in the direction of levitating the dump frame 22, the dump frame 22 will not float. First, the cargo handling arm 24 is bent and stationary with respect to the dump frame 22 from the beginning.
does not fall suddenly during operation, and the container 8 is unloaded smoothly and safely.

However, in the above container loading/unloading vehicle, the hook 25 of the dump frame 22 and the chassis frame 2
Since the container 8 is lowered onto the road surface 31 in a state in which the pin 28 on the first side is engaged, if the road surface 31 is uneven, the rollers 8a of the container 8 will move against the road surface 31 when the container 8 retreats on the road surface 31. The container 8 is caught on the protrusion and receives an impact force. This impact force is large and is transmitted from the container 8 to the dump frame 22 via the cargo handling arm 24.
2 moves up and down, and the hook 26 is in the engaged state.
There is a problem that the pins 28 and 28 are damaged by the impact force.

<Object of the Invention> Therefore, the object of the present invention is to prevent the dump frame from floating and falling suddenly even when the container is unloaded on a slope where the front side is downwardly sloped, and therefore to prevent the container from falling suddenly. To provide a container loading/unloading vehicle capable of safely and smoothly unloading a container without causing damage to the container, and safely retreating the container backward without damaging a hook and an engaging part even on an uneven road surface. There is a particular thing.

<Configuration of the invention> In order to achieve the above object, the configuration of this invention is as follows:
A dump frame at the rear end of the chassis frame, an L-shaped cargo handling arm pivotally supported on the dump frame, an engagement arm and hook that engage with the hanging pieces of the container, and a hook on the chassis frame side that corresponds to the hook. In a container loading/unloading vehicle having an engaging portion, the hook is provided with a rotating piece, the cargo handling arm is provided with a guide member, and the guide member is provided with a rotating piece.
During the unloading operation of the container, when the cargo handling arm rotates, the rear of the container contacts the rotating piece near where it touches the ground and rotates, and also releases the engagement between the hook and the engaging portion. a release part that forms an arc concentric with the shaft support of the cargo handling arm, and a release part that maintains the release of the engagement between the hook and the engagement part when the cargo handling arm further rotates. The connecting member is provided with a play that allows the hook to rotate, and a resilient member is provided between the hook and the dump frame to rotate the hook in a counterclockwise direction. It is characterized by

<Examples> The present invention will be described in detail below with reference to illustrated examples.

In Figure 2, 41 is a container loading/unloading vehicle;
42 is a container mounted on the loading platform 44 of the container loading/unloading vehicle 41; 45 is a chassis frame; 55 is a subframe fixed on the chassis frame 45;
6 is a dump frame pivotally supported at the rear end of the subframe 55.

At the tip of the dump frame 46, a pin 4 serving as a pivot support is attached to the rear end of an L-shaped cargo handling arm 48.
9 is rotatably connected, while the cargo handling arm 48
A hook 51 at the tip of the container 42 is engaged with a hook 52 on the front surface of the container 42. Further, the tip of the cargo handling cylinder 54 is rotatably connected to the approximate center of the horizontal portion 48a of the cargo handling arm 48, and the rear end of the cargo handling cylinder 54 is connected to a sub-assembly provided on the chassis frame 45. It is rotatably connected to the tip of the frame 55.

Further, as shown in FIGS. 2 and 1, a fan-shaped guide member 56 is provided on the outer periphery of the pin 49 of the cargo handling arm 48. The rear side of the guide member 56 has a smooth flat release portion 5 as shown in the figure.
6a, and the outer peripheral surface of the guide member 56 forms an arcuate release holding portion 56b concentric with the pin 49. Also, fishing type hook 5
8 is rotatably connected to the dump frame 46 behind the guide member 56 by a pin 59. The guide member 5 is attached to the upper end of the hook 58.
A rotating piece 61 extending laterally toward 6 is provided. The tip of the rotating piece 61 is connected to the cargo handling arm 4.
8 rotates to form a cam surface 61a against which the release portion 56a of the guide member 56 comes into contact.

Further, approximately at the center of the dump frame 46, a substantially U-shaped engagement arm 62 is provided with rear ends 6 at both ends thereof.
2a and 62a are rotatably connected by a pin 64. One end of the engagement cylinder 65 is rotatably connected to the approximate center of the engagement arm 62 with a pin 66, while the other end of the engagement cylinder 65 is connected to the subframe 55.
It is connected with a pin 68. An L-shaped hook 69 is provided on the bottom surface 42a of the container 42, so that when the engagement cylinder 65 is extended and the engagement arm 62 is perpendicular to the dump frame 46,
The engaging arm 62 is adapted to engage with the hook 69. Then, the extension member 71 fixed to the substantially central portion of the hook 58 and the base end of the engagement arm 62 is connected to the pin 74 at each end of the substantially L-shaped connecting member 72, respectively.
They are rotatably connected by 75. The connecting member 72 has an elongated hole 72a as a play at the tip end on the hook 58 side so that the hook 58 can freely move around the pin 59 within the distance of the elongated hole 72a. A screw structure is provided at the rear end so that the length can be adjusted.

Further, when the hook 58 is in a state perpendicular to the dump frame 46, a pin 76 as an engaging portion is provided on the sub-frame 55 on the chassis frame 45 side corresponding to the tip of the hook 58, so that the hook 58 is engaged with the pin 76. Further, the elongated hole 72a of the connecting member 72 is connected to the hook 5.
8 engages with the pin 76, the pin 74 engages with the elongated hole 7.
2a, and when the hook 58 is sufficiently removed from the pin 76, the pin 74 is formed to come into contact with the tip of the elongated hole 72a.

Furthermore, a spring 78 is provided between the hook 58 and the dump frame 46 as a resilient member that biases the hook 58 counterclockwise around the pin 59 so that the hook 58 always engages with the pin 76. There is.

Furthermore, rollers 79 are provided at the rear end of the dump frame 46 to guide the loading and unloading of the container 42.

In the container loading/unloading vehicle configured as described above, it is assumed that the container 42 is unloaded onto the ground on a sloping ground in front. At this time, the engagement cylinder 65 contracts in the same way as when unloading the container 42 on flat ground. Then, the engaging arm 62 is attached to the hanging piece 69 of the container 42.
The connecting member 72 connected to the engaging arm 62 is moved rearward. However, hook 58
Since the pin 74 only moves forward relative to the connecting member 72 within the long hole 72a of the connecting member 72, it is not affected by the movement of the connecting member 72.
Hook 58 remains engaged to pin 76 by the force of spring 78. This state, in other words,
When the cargo handling cylinder 54 is extended with the dump frame 46 fixed to the subframe 55 on the chassis frame 45 side, only the cargo handling arm 48 is rotated rearward about the pin 49. At the same time, the guide member 56 rotates clockwise, and the release portion 56a of the guide member 56 is released from the rotating piece 61.
comes into contact with the cam surface 61a of. During this time, hook 58
remains engaged with the pin 76 by the force of the spring 78, and the dump frame 46 remains engaged with the chassis frame 4.
Since the dump frame 46 is fixed to the 5 side, the danger of the dump frame 46 floating up and suddenly falling and the container 42 moving backward, as in the conventional example, is avoided. Further, when the cargo handling arm 48 rotates rearward to unload the container 42 onto the road surface, the guide member 56 rotates and the release portion 56 of the guide member 56 rotates.
a and the cam surface 61a of the rotating piece 61 slide, and the rotating piece 61 rotates clockwise around the pin 59, so the hook 58 rotates clockwise against the force of the spring 78. Then, it completely separates from the pin 76. At this time, as the hook 58 rotates, the pin 74 only moves forward within the elongated hole 72a of the connecting member 72, and the rotation of the hook 58 is not inhibited by the connecting member 72. As shown in FIG. 3, the upper end C of the release portion 56a and the cam surface 61
When the lower end D of the container 42 contacts the road surface, the rollers 42a of the container 42 contact the road surface. Next, the cargo handling arm 48
When the container 42 is moved backward on the road surface, the guide member 56 is rotated clockwise and the release holding portion 56b and the bottom portion 61b of the rotating piece 61 are rotated.
slides, and the hook 58 remains released from the pin 76. In this way, the container 42
When the rollers 42a are moved backwards on the road surface, the hooks 58 are completely disengaged from the pins 76, so even if the road surface is uneven and the rollers 42a are caught on a protrusion on the road surface, the impact force received by the container 42 is reduced. is connected to the dump frame 46 via the cargo handling arm 48.
The hook 58 and pin 76 will not be damaged. In other words, when shipping containers,
The rotating piece 61 of the hook 58 is guided by the guide member 56 provided on the cargo handling arm 48, and the engagement between the hook 58 and the pin 76 is released. It is designed not to be damaged.

Next, as shown in FIG. 4, when dumping the container 42, the engagement cylinder 65 is extended. Then, the engagement arm 62 of the dump frame 46 is engaged with the hanging piece 69 of the container 42, and at the same time, the connecting member 72 moves forward to lock the hook 5.
The pin 74 of No. 8 comes into contact with the rear end of the elongated hole 72a, and the connecting member 72 moves further rearward, and the hook 58 is automatically separated from the pin 76 against the force of the spring 78, and is connected to the dump frame 46. The connection with the subframe 55 on the palm frame 45 side is released. Thereafter, when the cargo handling cylinder 54 is extended, the dump frame 46 and the container 42 are integrally connected by the engagement arm 62 as described above, so that the cargo handling arm 48 and the dump frame 42 are integrally connected.
6 is in a straight line along the bottom surface of the container 42, and includes a cargo handling arm 48 and a dump frame 46.
is rotated about the axis of roller 79, and container 42 is dumped.

In this way, the operation of the engagement cylinder 65 causes the engagement arm 62 and the hook 69 to be engaged, the hook 58 and the pin 76 to be disengaged, and the engagement arm 62 and the hook 69 to be disengaged from each other via the connecting member 72. Since the engagement between the hook 58 and the pin 76 is interlocked, loading and unloading the container 42 and dumping the container 42 to the rear can be easily performed.

<Effects of the Invention> As is clear from the above explanation, according to the container loading/unloading vehicle of the present invention, when unloading a container, the hook and the engaging portion are kept in contact with each other by the resilient member until the rollers of the container come into contact with the road. Since they are engaged, it is possible to avoid the dangerous situation described in the conventional example where the dump frame floats up and suddenly falls, causing the container to suddenly retreat backwards. Also,
According to this invention, when the container retreats on the road, the engagement between the hook of the dump frame and the engagement portion on the chassis frame side is released by the guide member and the rotating piece of the hook. Even if the road surface is uneven and the rollers of the container get caught on a protrusion on the road surface, the impact force is only transmitted to the dump frame via the container, avoiding damage to the hooks and engaging parts.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the main parts of an embodiment of the container loading/unloading vehicle of the present invention, FIG. 2 is an overall view of the container loading/unloading vehicle, FIG. 3 is an operation diagram for unloading a container, and FIG. 4 is a container loading/unloading vehicle. A diagram of the state when the is tilted backwards,
FIG. 5 is a diagram showing a conventional container loading/unloading vehicle, FIG. 6 is a diagram showing main parts of the conventional example, and FIG. 7 is a diagram showing a conventional container loading/unloading vehicle. 42... Container, 45... Palm frame,
46...Dump frame, 48...Cargo handling arm, 56...Guide member, 56a...Release part, 5
6b...Release holding part, 58...Hook, 61...
Rotating piece, 62... Engagement arm, 69... Hanging piece, 7
2... Connecting member, 72a... Play, 76... Engaging portion, 78... Resilient member.

Claims (1)

[Scope of Claims] 1. A dump frame that can be tilted backward is pivotally supported at the rear end of the chassis frame, and an L
A letter-shaped cargo handling arm is pivotally supported so that it can rotate forward and backward.
The dump frame is provided with an engagement arm and a hook that engage and disengage from the hanging piece of the container, an engagement portion is provided on the chassis frame side corresponding to the hook, and a connecting member connects the hook and the engagement arm. When the engaging arm and the hanging piece engage,
When the engagement between the hook and the engagement portion is released, the container can be tilted backward on the chassis frame, and when the engagement between the engagement arm and the hanging piece is released, In the container loading/unloading vehicle, wherein the hook and the engaging portion are in an engaged state, and the container can be loaded and unloaded by rotating the cargo handling arm, the hook is provided with a rotating piece; The cargo handling arm is provided with a guide member, and the guide member rotates while contacting a rotating piece near where the rear of the container touches the ground when the cargo handling arm rotates during unloading of the container. , and a release part that releases the engagement between the hook and the engaging part forms an arc concentric with the shaft support of the cargo handling arm, and when the cargo handling arm further rotates, The hook is configured with a release holding part that holds the engagement with the engaging part, the connecting member is provided with play that allows the hook to rotate, and the hook and the dump frame are provided with a play that allows the hook to rotate. A container loading/unloading vehicle characterized by being provided with an elastic member that rotates the hook counterclockwise.