JPS6011038Y2 - Lift truck push pull device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push-pull device for a lift truck, which aims to prevent cargo from collapsing during cargo handling operations, facilitate grip operation, and improve the efficiency of cargo handling operations.

Generally, a push-pull device for a lift truck moves a push plate forward and backward by opening and closing a pantograph link mechanism using a hydraulic cylinder.

All the links in the above pantograph link mechanism were constructed with equal lengths, so when the mast was tilted forward during cargo handling operations, the push plate moved in parallel while maintaining the same forward tilt angle of the mast. The upper part of the pallet came into contact with the upper part of the load, and when the operator tried to grasp the sheet pallet deeply and securely, the load was crushed.

In order to solve the above situation, there are the following methods.

A face is provided on the telescopic link mechanism so that it can be tilted forward and backward, and a slider is provided that moves upward as the telescopic link mechanism expands and contracts.
Either the link is connected across the slider and the face (for example, Utility Model Application No. 53-12627), or one of the proximal ends of the link is installed in a guide groove provided vertically in the mounting frame. One of the distal ends of the link is fixed to a nearly oval-shaped cam housed in a cam groove provided vertically in the face, and a part of the link is attached between a part of the link and the face. A structure is adopted in which a biased tension spring is stretched so that the cam comes into sliding contact with the front surface of the cam groove (for example, Utility Model Application No. 53-52577).

The former has the disadvantage that it has a complicated structure and requires a lot of time to assemble, while the latter has the disadvantage that it takes a lot of time to process the elliptical cam.

Push-pull device for a lift truck of the present invention (hereinafter referred to as the device of the present invention).

) is a frame body 3 that moves in the front and back direction by a hydraulic cylinder.
is attached to the front of the lift truck 1, and the frame 3 and the push plate 5 are attached to the front of the lift truck 1.
These are connected by a pin 6, and the push plate 5 is tilted about the pin 6 only when it comes into contact with the cargo 4, thereby eliminating the above-mentioned drawbacks.

An embodiment of the device of the present invention will be described with reference to the drawings. 1 is a lift truck, 2 is a fork, and is attached to the front of the lift truck 1.

3 is a frame body, which is attached to the front of the lift truck 1;
It moves back and forth by a hydraulic cylinder (not shown).

4 is a cargo, 5 is a push plate, and a pin 6 is fixed to the bottom of the frame 3.
It is supported so that it can tilt freely.

Reference numeral 7 is sandwiched between the frame body 3 and the push plate 5 by a spring, and is used to buffer the push plate 5 when it comes into contact with the cargo 4, to prevent the push plate 5 from tilting backward during traveling, and to prevent the push plate 5 from coming into contact with or separating from the cargo 4. It plays the role of self-recovery.

A stopper member 8 is fixed to the frame body 3 near the fixed position of the pin 6, and prevents the push plate 5 from tilting forward.

Reference numeral 9 denotes a horizontal member of the push plate 5, and when the horizontal member 9 is tilted by a certain angle or more, the horizontal member 9 comes into contact with the upper part of the frame 3, thereby preventing backward tilting when contacting with the cargo 4. There is.

To explain the operating state of the device of the present invention, the frame body 3 on which the push plate 5 is tiltably mounted moves in parallel while maintaining the same forward tilt angle as the mast forward tilt angle at the same time as the hydraulic silling is activated.
Even after the upper part of the push plate 5 comes into contact with the upper part of the cargo 4, when the sheet pallet is moved in parallel in an attempt to grasp the sheet pallet deeply and securely, the push plate 5 tilts backward about the pin 6, and the cargo This prevents a biased force from being applied to the upper part of the load 4, and prevents the load 4 from being crushed.

In the device of the present invention, all the links of the pantograph type link mechanism are formed of equal length links, and the push plate 5 is connected to the frame body 3.
It has an extremely simple structure in which a bin 6 fixed to the lower part of the machine is tiltably supported, and it is possible to prevent the load from collapsing when trying to grasp the sheet pallet deeply and securely. Can be done.

Moreover, it also has the practical effect of not requiring much time for assembly and processing.

[Brief explanation of the drawing]

Fig. 1 is a side view of a lift 1 truck equipped with the device of the present invention, and Fig. 2 is a side view illustrating the operating state of the device of the present invention.
FIG. 3 is a front view of the device of the present invention, and FIG. 4 is an enlarged view of the main parts of the frame and push plate of the device of the present invention. 1... Lift truck, 2... Fork, 3... Frame, 4... Load, 5...
... Push plate, 6 ... Bottle, 7 ... Spring, 8 ... Stopper member, 9 ... Horizontal beam member.

Claims (1)

[Scope of utility model registration request] A frame body 3 that moves forward and backward by a hydraulic cylinder is attached to the front of the lift truck 1, and the frame body 3 and a push plate 5 are connected with a pin 6, so that the push plate 5 is connected to the pin only when it comes into contact with the cargo 4. 6
A push-pull device for a lift truck that tilts around the center.