JP3331496B2 - forklift - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift, and more particularly to a pusher for pushing a load placed on a fork forward with a pusher provided on a vehicle body to transfer the load from the fork to a pallet. Related to forklifts.

[0002]

2. Description of the Related Art A forklift with a pusher is
Generally, as shown in FIG. Forklift body 1
A mast 2 is erected in front of the mast 2, and an L-shaped lifter 3 in side view is provided on the mast 2 so as to be able to move up and down. The lifter 3
Is provided with a fork 4 for placing a load W thereon and a pusher 5 for transferring the load W on the fork 4 onto a pallet P.

The pusher 5 is a plate 6 for pressing the load W.
And a hydraulic mechanism (not shown) and a link mechanism 7 for driving the plate 6 forward and backward in the front-rear direction, and are driven by operating an appropriate switch provided on an operation panel 8 of the vehicle body 1.

When the load W is transferred from the fork 4 to the pallet P, the vehicle body 1 is first stopped at the position shown in the figure, and then the switch is operated to drive the pusher 5 to advance the plate 6 forward. Then, the load W is pressed on the fork 4 and moved,
The load W is transferred onto the pallet P. Or fork 4
After the vehicle body 1 is stopped so that the vehicle body 1 is located on the pallet P, the load W is transferred from the fork 4 onto the pallet P by driving the pusher 5 and slowly moving the vehicle body 1 backward.

[0005]

In the former method, when the load W is transferred, the load W slides on the pallet P and is placed on the pallet. There is a problem that problems such as collapse of the load are likely to occur. Further, according to the latter method, the advance speed of the plate 6 and the retreat speed of the vehicle body 1 need to be the same speed, which is a work requiring considerable skill.

[0006] In any of the above-mentioned methods, it is difficult to reliably transfer the load, and there is a problem that the load is damaged and a worker is tired. Therefore, an object of the present invention is to provide an apparatus which can transfer a load more easily and reliably.

[0007]

According to a first aspect of the present invention, there is provided a lifter capable of moving up and down along a mast erected on a vehicle body. The lifter has a fork for placing a load thereon and a fork on the fork. A pusher for pushing forward a load placed on the forklift, wherein the pusher is provided with a vertically movable leg, and the leg is lowered to bring the lower end of the leg into contact with the ground. By operating the pusher,
Provided is a forklift, wherein a load on a fork is transferred onto a pallet while the vehicle body is moved backward.

According to a second aspect of the present invention, there is provided a forklift according to the first aspect, wherein the legs are provided at left and right ends of the pusher, respectively, and each leg is disposed outside the fork. provide.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the invention, the leg comprises a hydraulic cylinder provided on the pusher, and a locking member fixed to a piston rod of the cylinder and pressed against the ground to provide a forklift.

According to a fourth aspect of the present invention, there is provided the first to third aspects.
In the invention, a forklift is provided, which is provided with a brake control device for turning on or off a brake of the vehicle body in accordance with the vertical movement of the leg.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to examples. In the following description, the same portions as those of the above-described conventional device will be described using the same reference numerals.

[0012]

1 to 4 show an embodiment of the present invention. Hydraulic cylinders 10 and 10 are fixed vertically on both outer sides of the plate 6 of the pusher 5 so that the cylinder rod 11 moves forward and backward. A lock 12 having a friction member such as rubber is fixed to a lower end of the rod 11, and when the rod 11 is extended by a maximum length, the lock 12 is pressed against the ground G to act as a leg. Do. Each hydraulic cylinder 10, 10 is arranged outside the fork 4 so that the rod or the locking tool 12 does not interfere with the fork 4 when the rod 11 is extended. Reference numeral 13 denotes a hose that supplies pressure oil from the vehicle body 1 to the cylinder 10.

Drive wheels 14 are front wheels of the forklift, are individually rotated by electric motors 15, and are braked by brake devices 16, 16, respectively. Reference numeral 17 denotes a brake pedal provided on the bottom of the driver's seat.
6 is activated.

Reference numeral 18 denotes an operation lever for driving a hydraulic cylinder 19 for operating the pusher 5, and reference numeral 20 denotes an operation lever for operating the hydraulic cylinders 10 on both sides of the pusher. 21 is the brake pedal 17
Is a brake control device that drives the brake devices 16 and 16 by detecting the operation of the hydraulic cylinders 10 and detects the tilt angle of the operation lever 20 for driving the hydraulic cylinders 10 and 10 so that the locking member 12 is at the lowered position. At this time, the operation of the brake devices 16, 16 is released, and the operation is restored when the brake device is at the raised position.

The operation of this embodiment will be described.
When performing an operation of transferring the load W from the forklift to the pallet P, first, the operator moves the vehicle body 1 as shown in FIG.
That is, the load W is stopped such that the load W is located substantially at the center of the pallet P.

Next, the hydraulic cylinders 10, 10 are driven by tilting the operation lever 20, and the rods 11, 11 are extended to firmly press the locking member 12 against the ground G. At this time, the brake control device 21 detects the operation of the lever 20, and releases the operation of each of the brake devices 16, 16.
As a result, the vehicle body 1 is released from the brake,
Since the vehicle body 2 is firmly pressed against the ground, the vehicle body 1 does not unexpectedly move forward or backward, and the stopped state is maintained.

Next, the hydraulic cylinder 19 is driven by tilting the operation lever 18, the link mechanism 7 is extended, and the load W is pushed forward from above the fork 4 by the plate 6. The plate 7 is pressed forward together with the load W simultaneously with the extension of the link mechanism 7.
2 is firmly fixed to the ground G, and at this time, since the brake of the vehicle body 1 is released, the plate 6 does not change its position and the vehicle body 1 slowly moves at the same speed as the extension speed of the link mechanism. And retreat. With this, the load W
Is moved from the top of the fork 4 to the top of the pallet P, and the state shown in FIG. 2 is obtained.

When the transfer of the load W is completed, first, the operator operates the operation lever 20 to shorten the piston rod 11 of the hydraulic cylinder 10 and releases the fixing of the plate 6 by the locking member 12. Accordingly, the return operation of the lever 20 is detected by the brake control device 21, and the brake control device 21 returns the brake devices 16, 16 to the operating state again, thereby bringing the vehicle body 1 into the stopped state.

After that, when the operating lever 18 is returned to the original non-operating state, the pusher 5 returns to the state shown in FIG. 3 while the vehicle body 1 is stopped at the position shown in FIG.
, Or can be transported by another forklift or the like.

In the transfer of the load W, the load W does not slide on the pallet P, so that there is no problem such as collapse of the load. In addition, the retreating operation of the vehicle body 1 is an extremely simple operation because the operator does not have to perform the accelerator operation but only has to push the pusher 5 forward with the operation lever 20.

In the above-described embodiment, the means for raising and lowering the locking member 12 is not limited to the hydraulic cylinder 20, but may be an electric motor or a device which moves up and down manually.
When the operation of the fork 4 and the pusher 5 is performed by a hydraulic cylinder, it is preferable to use a hydraulic cylinder because a common hydraulic pump can be used and the device configuration can be simplified. It is preferable that the locking members 12 are disposed at both outer positions of the fork 4 in that interference with the fork 4 does not occur and the position of the plate 6 can be securely fixed. A configuration in which the brake control device 21 turns on / off the operation of the brake of the vehicle body in accordance with the state of the operation lever 20 is preferable from the viewpoint of improving work efficiency and safety. However, it is not always necessary to provide the brake control device 21. It is also possible to perform the operation in accordance with the tilt of the lever 18. .

[0022]

As described above, according to the first invention of the present application, it is possible to transfer a load easily every other day without causing damage to the load and fatigue of the operator. Further, according to the second aspect, the interference between the leg and the fork does not occur, and the distance between the two legs can be ensured widely, so that the position of the pusher plate can be reliably fixed. According to the third aspect, the up and down operation of the legs can be reliably realized with a simple configuration.
Further, according to the fourth aspect, there is an advantage that the efficiency of the load transfer operation can be improved, and unexpected movement of the vehicle body in the transfer operation can be prevented, and the operation safety can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a forklift according to the present invention.

FIG. 2 is a side view of the forklift according to the present invention.

FIG. 3 is a side view of the forklift according to the present invention.

FIG. 4 is a schematic diagram showing an upper surface of a forklift according to the present invention.

FIG. 5 is a side view showing a conventional forklift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Mast 3 Lifter 4 Fork 5 Pusher 6 Plate 10 Hydraulic cylinder 11 Cylinder rod 12 Locking device 16 Brake device 18 Operation lever 21 Brake control device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuyuki Yamaguchi 2-1-1 Higashikami-shi, Nagaokakyo-shi, Kyoto Inside Japan Transport Aircraft Co., Ltd. (72) Inventor Haruhiko Towaka 2-1-1 Higashikami-shi, Nagaokakyo-shi, Kyoto Japan Inside Transport Machine Co., Ltd. (72) Inventor Hiroshi Minami 2-1-1, Higashikamishi, Nagaokakyo City, Kyoto Prefecture Examiner, Minoru Torii, Japan Transport Machine Co., Ltd. 58) Field surveyed (Int. Cl. ⁷ , DB name) B66F 9/19

Claims (4)

(57) [Claims] 1. A lifter which can move up and down along a mast erected on a vehicle body, a fork for loading a load, and a pusher for pushing forward the load placed on the fork. A forklift equipped with a pusher, the pusher is provided with a vertically movable leg, the leg is lowered, and the pusher is operated in a state where the lower end of the leg is in contact with the ground, thereby retreating the vehicle body. A forklift characterized in that a load on a fork is transferred onto a pallet while being moved. 2. The forklift according to claim 1, wherein said legs are provided at left and right ends of said pusher, respectively, and each leg is arranged outside said fork. 3. The leg according to claim 1, wherein the leg comprises a hydraulic cylinder provided on the pusher, and a locking member fixed to a piston rod of the cylinder and pressed against the ground. Forklift described in Crab. 4. The forklift according to claim 1, further comprising a brake control device for turning on or off a brake of the vehicle body in accordance with the vertical movement of the leg.