JPH0452240Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a fork extraction device for a forklift truck.

[Conventional technology]

In the currently commonly used forklift truck, a mast device is provided at the front of the vehicle body, as shown in FIG.

The mast device includes an outer mast 12 provided on the vehicle body and an inner mast 11 that can be raised and lowered along the outer mast 12. The inner mast 11 is raised and lowered by a lift cylinder 10.
A lift bracket 5 and a backrest 8 are provided at the lower end of the inner mast 11, and an L-shaped fork 1 is attached to a finger bar 9 attached to the backrest.

[Problem that the invention attempts to solve]

As mentioned above, in the conventional forklift, the fork 1 is fixedly installed on the lift bracket 5.

Therefore, in conventional forklift trucks,
When inserting the fork 1 under a loaded object or removing the fork 1 from a loaded object, it is necessary to move the entire forklift forward or backward.

Furthermore, when carrying out cargo handling work without using pallets, the load remains on the fork, so there is a problem in that it is difficult to remove the fork from below the load.

[Purpose of the invention] In view of the above-mentioned problems, an object of the present invention is to provide a device that can easily remove forks from a loaded object even when carrying out cargo handling operations without pallets.

[Means for solving problems]

In the present invention, the fork is provided so as to be movable horizontally with respect to the lift bracket between a position where the load is loaded and a position removed from the loading position, and the fork is movable between the position where the load is mounted and the position where the load is placed on the lift bracket. The above object is achieved by a fork extraction device in which a lifting hook is provided so as to be able to move up and down between a position higher than the fork in the mounting position and a position lower than the fork in the mounting position.

[Effect]

In the present invention, the hook is provided so as to be movable up and down between a position higher than the fork at the loading position and a position lower than the fork at the loading position. When loading a load onto a fork, place the hook under the load, hook it up, lift the hook above the top of the fork to float the load, and then load the fork in this state. A load can be loaded onto the fork by moving horizontally below the object and then lowering the hook below the top surface of the fork.

Usually, the top surface of the hook is lower than the top surface of the fork, so that cargo can be placed on top of the fork for transportation.

When unloading this load, raise the hook above the top of the fork, lift the load above the top of the fork, float the load above the fork, and in this state move the fork horizontally to unload the load. can be unloaded.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments of the present invention.

FIG. 1 is a perspective view of the main parts of a first embodiment of the present invention.

Two pairs of brackets 6 are provided on the front surface of the lift bracket 5, and a vertical portion of an L-shaped fork 1 is swingably supported on each pair of brackets 6.

Swing cylinders 3 are provided substantially horizontally at both left and right ends of the front surface of the lift bracket 6, and the tip of the piston rod of each swing cylinder 3 is pivotally connected to the fork 1.

Therefore, by moving the piston of the swing cylinder 3 forward and backward using fluid pressure such as oil pressure, the piston rod expands and contracts, and the fork 1 is rotated in the horizontal direction. Move between the loaded position and the unloaded position.

An elevating cylinder 4 is vertically provided at the center of the front surface of the lift bracket 5, and a hook 2 is fixed to the tip of a piston rod of the elevating cylinder 4.

Therefore, the lifting cylinder 4 is moved by fluid pressure such as oil pressure.
By moving the piston back and forth, the piston rod expands and contracts, and the hook 2 is raised and lowered.

The hook 2 is normally located below the top surface of the fork 1 as shown in FIG. 2, but by operating the lifting cylinder 4, the top surface of the hook 2 can be lifted above the top surface of the fork 1. .

In the apparatus of this embodiment configured as described above,
When loading a load 13 such as a steel plate on the fork 1, place the hook 2 under the load and hook it, then lift the hook 2 above the top surface of the fork 1 to levitate the load 13. In this state, move the fork 1 horizontally to below the load (see Figure 3), and then lower the hook 2 below the top surface of the fork 1 to move the load 13 without a pallet to the fork 1. It can be loaded on top.

Normally, the top surface of the hook 2 is lower than the top surface of the fork 1, so that the load 13 can be placed on the fork 1 and transported, etc., even without a pallet.

When unloading the loaded object 13, the hook 2 is raised above the top surface of the fork 1, and the loaded object 13 is lifted above the upper surface of the fork 1, so that the loaded object 13 floats above the fork 1 (the state shown in FIG. 3). By moving the fork 1 in the horizontal direction in this state, the load 13 can be unloaded without a pallet.

Another embodiment is shown in FIGS. 4 and 5. In this embodiment, the fork 1 has a T-shaped cross section as shown in FIG. 5, one shoulder of the T-shaped cross section is a rail portion 1b for moving the fork 1 back and forth, and the other A gear 1a is formed on the shoulder. A finger bar 9 attached to the lift bracket 5 is formed with a recess 9a corresponding to the cross-sectional shape of the fork 1.

A motor 3' is fixed to the rear of the finger bar 9, and a pinion 7 is attached to the drive shaft of the motor 3'. The pinion 7 meshes with the gear 1a of the fork 1.

By rotating the motor 3', the fork 1 is moved back and forth along the finger bar 9 via the pinion 7.

A hook is provided as in the previous embodiment.

In contrast to the forks that were rotated in the previous embodiment, in this embodiment, the forks are moved back and forth, so that it is possible to similarly load and unload cargo onto and from the forks. can.

Further, in both of the embodiments described above, a plurality of hooks 2 may be provided, and the mounting position is not limited to the central part of the front surface of the lift bracket 5, but may be mounted shifted to the side.

[Effect of idea]

In the present invention, the hook is provided so as to be movable up and down between a position higher than the fork at the loading position and a position lower than the fork at the loading position. For this reason, put the hook under the load, hook it, lift it above the top surface of the fork, and with the load floating, move the fork horizontally to the bottom of the load, and move the load onto the fork. It can be loaded on top. Further, the loaded object can be lowered by placing the hook under the loaded object and then raising it over the upper surface of the fork and moving the fork horizontally with the loaded object floating above the fork.

According to the present invention, it is possible to unload an item from a fork without using a pallet, and the item can be unloaded without reversing the forklift truck. Easy to raise and lower.

Further, in the present invention, both the fork and the hook are provided on the lift bracket, and the hook is of a lifting type, so that the apparatus can be made compact.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of the first embodiment of the present invention;
Fig. 2 is a side view of a part of Fig. 1, Fig. 3 is a side view showing how the embodiment of Fig. 1 is used, Fig. 4 is a plan view of another embodiment of the present invention, and Fig. 5. 4 is a front view, and FIG. 6 is a perspective view of the front of a conventional forklift truck. 1...Fork, 2...Hook, 3...Swing cylinder, 4...Lifting cylinder, 5...Lift bracket.

Claims (1)

[Claims for Utility Model Registration] 1. A fork is provided so as to be movable in a horizontal direction relative to a lift bracket between a position where a load is mounted and a position removed from the loading position, and the lift bracket A fork extraction device characterized in that a hook for lifting a loaded object is provided so as to be movable up and down between a position higher than the fork at the loading position and a position lower than the fork at the loading position. 2. The fork extraction device according to claim 1, wherein the fork is rotatably attached to a lift bracket. 3. The fork extraction device according to claim 1, wherein the fork is attached to a lift bracket so as to be movable forward and backward.