JPS6239957Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a loading platform position adjustment device for a freight vehicle having a removable loading platform that can be freely reloaded.

Conventionally, the loading platform position of a freight vehicle with a removable loading platform that can be freely reloaded has been corrected by lifting the loading platform using a hydraulic cylinder installed perpendicularly to the chassis frame of the vehicle body, and attaching the loading platform onto the chassis frame. Then, either correct the position of the entire loading platform using a guide member etc. protruding from the chassis frame, or install a lift arm across the upper ends of the left and right hydraulic cylinders and protrude the guide member onto the lift arm. hand,
When the loading platform is lifted, the position is corrected in the left-right direction, and when the loading platform is mounted on the chassis frame, the position is adjusted in the longitudinal direction.

However, in order to make the minimum ground clearance of the chassis frame as low as possible for small freight vehicles, etc., when the device for raising and lowering the loading platform is a link mechanism,
Because the lift part, which is attached to the tip of the link and acts as a buffer for the loading platform, rotates or draws an arc, the lifting section is wedge-shaped, so the lift part and the lift receiving part of the loading platform are Therefore, there was a problem in that it had to be mounted on the chassis frame in an unstable state.

Therefore, the present invention was developed in view of the above-mentioned conventional problems, and it is possible to use a link mechanism as the lifting device for the loading platform, and when the loading platform is supported by the link mechanism, the front and rear, left and right positions of the loading platform cannot be corrected. It is an object of the present invention to provide a loading platform position correction device that can be reliably mounted on a chassis frame in a stable state.

Therefore, in the present invention, the loading platform position correction device is attached to the tip of a link mechanism, and is moved vertically up and down on the chassis frame by a fluid pressure device such as a hydraulic cylinder through the link mechanism and connector. , a shaft rotatably fitted to the tip of the link mechanism; a cylindrical center beam rotatably fitted to the middle portion of the shaft; and a cylindrical center beam rotatably fitted to both ends of the shaft. It consists of a side beam formed in a conical shape so that the outer end is tapered, and the front and rear surfaces and both left and right sides of the lift receiving part formed on the lower surface of the loading platform and to which the lift engages are appropriately sloped. The structure was designed to achieve the intended purpose.

The present invention will be described below with reference to illustrative embodiments.

A is a freight vehicle, a is a chassis frame, and a subframe 11 is fixed to the upper surface of the chassis frame a. Reference numeral 12 denotes a cross member disposed between the sub-frames 11, of which the cross member 1 is located at the center.
On the front and rear sides of 2, hydraulic cylinders 13 serving as fluid pressure devices that can be operated separately are arranged in parallel with the subframe so as to face each other, and the base ends of the cylinder bodies 14 are connected to the cross. The member 12 is rotatably pivotally connected to the front and rear edges of the member 12 via a bracket 15 and a pin 16, respectively.
Further, the tip of the piston rod 17 slidably inserted into the cylinder body 14 is connected to the subframe 1.
The connectors 19 are connected to the center portions of connectors 19 whose left and right ends are slidably fitted to guide rails 18 provided inside the subframes 11 at the front and rear portions of the connectors 1 .

20 is a link mechanism consisting of two long arms 21 and two short arms 22 having half the length of the long arms 21;
1 is connected to the piston rod 1 of the connector 19.
Brackets 23 are attached to both ends of the opposite side where 7 is connected.
The elongated arm 21 is rotatably connected to the long arm 21 by a pin 24, and a lift 25 for raising and lowering the loading platform b is pivotally connected to the other end of the long arm 21. Moreover, the short arm 22
One end is connected to a pin 27 via a bracket 26 to the cross member 12 located below the lift 25.
The other end of the short arm 22 is rotatably connected to the center of the long arm 21 by a pin 28.

The lift 25 includes a shaft 2 that is rotatably fitted into the other end of the long arm 21 of the link mechanism.
9, and a bearing 30 in the middle of the shaft 29.
and a cylindrical center beam 32 rotatably fitted through a bearing cage 31, and side beams 34 rotatably fitted to both ends of the shaft 29.
The outer end is tapered into a conical shape. The side beam 34 is secured to the shaft 29 by a taper pin 33 that is fitted into and secured to the shaft 29 so as not to fall off. 29a is a pin hole formed in the shaft 29, and 34a is a taper pin insertion hole formed in the side beam 34.

b is a loading platform, and a lift receiving part 35 with which the lift 25 engages is recessed at a position corresponding to the lift 25 on the lower surface of the loading platform b, and the front and rear surfaces 35a, 35b and left and right sides of the lift receiving part 35 are recessed. Both side surfaces 35c are sloped at appropriate angles.

With the above configuration, when the lift 25 is raised to lift the loading platform b, if the opposing positions of the loading platform b and the lift 25 are shifted in the left-right direction, the third
As shown in the figure, the sloped surface 34b of the conically formed outer end of the side beam 34 and the sloped portion of the side surface 35c of the lift receiving part 35 join, and the position of the loading platform b in the left-right direction is corrected. In addition, if the relative positions of the loading platform b and the lift 25 are shifted in the front-rear direction, the center beam 32 is shifted as shown in FIG.
is joined to either of the inclined parts of the front and rear surfaces 35a and 35b of the lift receiving part 35, and the position in the front and back direction is corrected.

As described above, according to the present invention, the lift, which is attached to the tip of the link mechanism and is configured to vertically move up and down on the chassis frame by means of the fluid pressure device via the link mechanism and the connector, is connected to the cargo platform. Since a position correction function is provided, the position of the cargo platform can be corrected when the cargo platform is lifted by the lift. Therefore, since the position of the cargo platform is adjusted while floating above the road surface, the position can be easily adjusted in an unloaded state.

In addition, according to the present invention, the center beam of the lift is made into a rotatable cylindrical shape, so that the lift and the lift receiving part are securely connected without being affected by the rotational movement or arcing movement of the arm caused by the link mechanism. Can be joined with Therefore, it is possible to mount the loading platform on the chassis frame in a stable manner.

[Brief explanation of the drawing]

Figure 1 is a side view of a freight vehicle equipped with a lift equipped with a loading platform position correction device according to the present invention, Figure 2 is a perspective view of the same lift, and Figure 3 shows the relationship between the lift and the lift receiver of the loading platform. FIG. 4 is a partially cutaway front view, and FIG. 4 is a sectional view taken along the line -- in FIG. 3. A is a freight vehicle, a is a chassis frame, 13 is a hydraulic cylinder, 19 is a connector, 20 is a link mechanism,
25 is a lift, 29 is a shaft, 32 is a center beam, 34 is a side beam, b is a loading platform, and 35 is a lift receiver.

Claims (1)

[Scope of utility model registration request] A lift, which is attached to the tip of the link mechanism and is configured to move vertically up and down on the chassis frame by a fluid pressure device via the link mechanism and the connector, is rotatably fitted into the tip of the link mechanism. a shaft; a cylindrical center beam rotatably fitted to an intermediate portion of the shaft; and a cylindrical center beam rotatably fitted to both ends of the shaft, the outer end being formed into a conical shape so as to be tapered. A cargo vehicle having a removable loading platform, characterized in that the front and rear surfaces and both left and right sides of a lift receiving part formed on the lower surface of the loading platform and to which the lift engages are appropriately sloped. Loading platform position correction device.