JPS6329658B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo handling vehicle capable of loading or unloading containers between the ground and the vehicle platform.

Conventionally, as an example of a cargo handling vehicle, the bases of arms are rotatably supported on both sides of the rear of the chassis, and the tips of both arms are connected via a horizontal shaft to form a gate shape. Each arm is connected to a cylinder that rotates the arm,
Two arm chains are provided at the tip of the arm, and the two chains are bifurcated and connected to the side of the container, and by rotating the arm in the front and back direction via a cylinder, the container can be moved from the ground to the vehicle platform. Vehicles that are loaded on top of the vehicle or unloaded onto the ground from the undercarriage are known.

In such cargo handling vehicles, because the arm does not have a sufficient rotation angle, there is a problem in that, for example, containers cannot be loaded or unloaded between the platform and a pit or other position lower than the running surface of the cargo handling vehicle. .

The present invention has been made in view of such problems, and provides a cargo handling vehicle that can obtain a larger rotation angle of the arms by connecting the arms via a link mechanism.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 is a cargo handling vehicle that transports a container 3 mounted on a chassis 2 so as to be freely loaded and unloaded. A member 4 is fixedly installed, and a roller jack 5 is supported by a cylinder 6 on the supporting member 4 so as to be rotatable up and down.

One ends of first links 7, 7 and second links 8, 8 are rotatably supported on both rear sides of the vehicle chassis 2, and these first links 7 and second links 8 intersect with each other. It is extended upwards.

The intermediate portions of the first links 7, 7 and the other ends of the second links 8, 8 are pivotally connected to the bases of arms 9 disposed on both sides of the vehicle chassis 2.

On the other hand, the bases of hydraulic cylinders 10, 10 are rotatably supported in the middle portions of both sides of the vehicle chassis 2.
At the tip of the piston rod are the first links 7, 7.
The other end is rotatably supported.

Incidentally, the tips of the two arms 9, 9 are connected via a horizontal shaft 11 to form a gate shape, and brackets 12,
12 is pivotally mounted.

Two arm chains 13, 13 are attached to the lower part of the brackets 12, 12, and the lower ends of the two arm chains 13, 13 can be connected to pins 14, 14, 14, 14 protruding from the side surface of the container 3. ing.

Note that 15 is an engagement pin provided at the rear lower part of the container 3, and 16 is a hook that is provided on the chassis 2 and is detachable from the engagement pin 15.

Next, the operation of the first link 7 and the second link 8 will be explained with reference to FIG. 3. In FIG. 3a, the first link 7 and the second link 8 are in a running state.

Now here, the chassis 2 of the first link 7 and the second link 8
The pivot parts to the side are set as 7a and 8a, and the pivot parts to the arm 9 side are set as 7b and 8b.

From this state, when the first link 7 is appropriately rotated clockwise about the pivot portion 7a, the rotation of the first link 7 causes the pivot connection 7b to be connected to the first link 7.
The arm 9 that has been moved is also pressed, and the arm 9 starts rotating together with the first link.

At this time, since the other end of the arm 9 is pivotally connected 8b to the second link 8, the arm 9 is restricted by the second link 8 whose one end is pivotally supported 8a on the vehicle chassis. Moreover, since the first link 7 and the second link 8 intersect in such a way that the pivot part 8a of the second link 8 is located forward of the chassis-side pivot part 7a of the first link 7, the first link The rotation of 7 causes the second link 8 to rotate the arm 9 clockwise about the pivot portion 7b.

In this way, the arm 9 follows the rotation of the first link 7 and is restricted by the second link 8 to rotate around the pivot portion 7b. As a result, the arm 9 follows the rotation of the first link 7. It is amplified and rotated.

As a result, as shown in FIG. 3c, according to the link mechanism consisting of the first link 7 and the second link 8, when the first link 7 rotates approximately 90 degrees, the arm 9 rotates approximately 180 degrees. It is something that can be moved.

The operation of the embodiment of the present invention will be explained below based on FIGS. 1 and 2. When discharging the loaded object in the container 3 from the running state shown in FIG. 1, the roller jack 5 is grounded on the ground. After the hook 16 is engaged with the engagement pin 15 provided at the rear lower part of the container 3 mounted on the chassis 2, the cylinders 10, 10 are extended and the arms 9, 9 are rotated rearward, and the container 3 is 3 is tilted to discharge the cargo inside the container 3.

Also, when loading the container 3 onto the chassis 2,
As shown in FIG. 2, the roller jack 5 is brought into contact with the ground, the cylinders 10 are extended while the chassis 2 is not rocked, and the arm 9 is extended through the first links 7, 7 and the second links 8, 8. , 9 to the rear, and pins 14, 14, 14, with the lower ends of the two arm chains 13, 13 protruding from the side of the container 3,
14, connect it to. Subsequently, when the arms 9, 9 are rotated forward, the container 3 is lifted up, moved forward, and mounted on the chassis 2.

On the other hand, when unloading the container 3, the above operation may be performed in reverse.

In addition, when loading or unloading the container 3, if the loading and unloading location is lower than the running surface of the cargo handling vehicle, for example, even if it is a pit, the cooperation between the first link 7 and the second link 8 will be delayed as described above. Since the arm 9 can be rotated more greatly by the action, loading and unloading of containers becomes possible.

As described above, according to the present invention, the first link and the second link are rotatably supported on the chassis and the arm so as to intersect, and the arm rotation cylinder is rotatably supported on the first link. This allows the arm to rotate at a larger angle than conventional models, making it possible, for example, to load or unload containers between the platform and the ground that is lower than the running surface, such as a pit. .

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and Fig. 1 is a side view of a cargo handling vehicle showing a state in which a container is loaded and the container load is discharged, and Fig. 2 is a side view of a cargo handling vehicle showing a state in which a container is loaded and unloaded on the ground and below the ground. FIGS. 3A to 3C are side views of the cargo handling vehicle shown with some parts omitted, and FIGS. 3A to 3C are explanatory views of the operation of the first link and the second link. 1... Cargo handling vehicle, 2... Chassis, 7... First link, 8... Second link, 9... Arm, 10...
Cylinder.

Claims (1)

[Claims] 1. The base of an arm that rotatably supports the bases of the first link and the second link on both sides of the rear of the vehicle chassis, and crosses these first and second links with their tips disposed on both sides of the vehicle chassis. A cargo handling vehicle characterized in that a piston rod tip of a cylinder whose base end is rotatably supported on the vehicle chassis is rotatably supported on the first link. .