JPH0636071Y2 - Push-pull device for cargo handling vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a push-pull device for a cargo handling vehicle that pulls in and pushes out a load along a fork claw that raises and lowers a load together with a sheet pallet to load and load.

[Conventional technology]

The following are known as push-pull devices for cargo handling vehicles.

That is, a fork claw is provided so as to be able to move up and down along a mast provided in the front part of the vehicle body, and a face provided with a seat gripper is provided along the fork claw so as to be movable in the front-rear direction.
Move the face forward to the front position and grip the sheet pallet laid under the load with the sheet gripper, while moving the face backward to the front position closest to the vehicle body, travel forward on the vehicle body and fork the load with the sheet pallet. With the seat pallet pulled by the nails, the seat pallet is held by the seat gripper and the face pallet is moved forward to the farthest position away from the car body while the grip is released. A push-pull device that pushes a load forward and puts the load on it.

The sheet gripper of such a push-pull device is, for example, the fifth gripper.
As shown in the figure, a hook-shaped sheet receiver 2 is provided at the bottom of a face 1 that is movable in the front-rear direction on a frame (not shown), and a sheet pallet 3 is pressed against a horizontal piece 2a of the sheet receiver 2 with a holding piece 4. The sheet pallet 3 is gripped and the pressing piece 4 is lifted to release the sheet pallet 3,
In the state where the sheet pallet 3 is pulled along with the load along the fork claws 5 and the presser piece 4 is lifted to release the sheet pallet 3, the sheet pallet 3 is placed on the horizontal piece 2a of the sheet receiver 2, When 1 is moved forward, the sheet pallet 3 is pushed by the sheet receiver 2 and pushed out from the fork claws 5, and the sheet pallet 3 is moved to the fork claws 5.
You can't just push out the load leaving it on top. For this purpose, the frame is made movable up and down by a hydraulic cylinder, a seat retainer is provided at the lower part of the frame so as to face the fork pawl, and the sheet pallet is pressed against the fork pawl by the sheet retainer to leave the sheet pallet on the fork pawl. Only the load can be pushed out.

[Problems to be solved by the device]

In such a device, since the frame equipped with the seat retainer is moved up and down by the hydraulic cylinder, the thick oil pipe to the hydraulic cylinder deteriorates the forward visibility and oil may leak from the hydraulic cylinder. Not only does it soil the load and sheet pallet, but it takes a long time to operate the hydraulic cylinder after operating the operating valve, resulting in poor responsiveness.

Therefore, an object of the present invention is to provide a push-pull device for a cargo handling vehicle that can solve the above-mentioned problems.

[Means and Actions for Solving the Problems]

A frame equipped with a seat retainer was provided so that it could be lifted up and down by a lifting device equipped with an electric motor, and a face was provided on this frame so that it could be moved back and forth along the fork claws, and a seat gripper was provided below the face. With this, one end of the sheet pallet comes up on the fork claws by holding the one end of the sheet pallet with the sheet gripper and pulling it up onto the fork claws to raise the frame. One end of the fork can be pressed and gripped, and in that state the face pallet can be moved forward to push only the load while leaving the sheet pallet on the fork claw, and since an electric motor is used, fine electrical wiring is sufficient. Not only does not impair the forward visibility, but oil leakage does not occur and the responsiveness can be improved.

〔Example〕

As shown in FIG. 1, a pair of left and right fork claws 11 and 11 are provided on a lifting body 10 that moves up and down along a mast of a vehicle body (not shown), and the lifting body 10 has a U-shaped lateral cross section. A pair of left and right frames provided with a pair of guide rails 12 and having a U-shaped cross section along each frame 12.
13 and 13 are provided so as to be able to move up and down, and an elevating mechanism 14 is provided across the frame 13 and the guide rail 12, and a pair of left and right seat retainers 15 and 15 are provided below the pair of left and right frames 13 and 13. The face 17 is provided so as to face the fork pawl 11, and a face 17 is provided on the pair of left and right frames 13, 13 so as to be movable back and forth along the fork pawl 11 by a moving mechanism 16.

The moving mechanism 16 is provided with a pair of left and right first and second telescopic links 18, 18, 19, 19 which are telescopically operated by a cylinder (not shown) or the like. It is pivotally attached to the member 20 and the lower horizontal member 17a of the face 17, and both ends of the second expansion link 19 are slidably supported along the frame 13 and the vertical member 17b of the face 17.

A sheet gripper 23 having a sheet receiver 21 and a pressing piece 22 is provided below the face 17, and the pressing piece 22 is lifted and lowered by a cylinder or the like (not shown) to move the sheet pallet A to the horizontal piece 21a of the sheet receiver 21. It is designed to be pressed, grasped, and released.

As shown in FIG. 2, the elevating mechanism 14 is provided with a horizontal plate 24 on the upper portion of the frame 13, and a nut 25 is provided on the horizontal plate 24.
An electric motor 26 is provided on the guide rail 12, and a screw 28 is connected to the output side of the electric motor 26 via a speed reducer 27.
28 is screwed to the nut 25 and protrudes upward from the horizontal plate 24, so that the frame 13 moves up and down along the guide rail 12 by driving the electric motor 26 forward and backward to rotate the screw 28 forward and backward. I am doing it.

The horizontal plate 24 is laid horizontally between the left and right frames 13, 13 so that the left and right frames 13, 13 ascend and descend in synchronization.

Next, the operation will be described.

As shown in FIG. 3 (a), the sheet gripper 23 grips one end A ′ of the sheet pallet A with the face 17 at the front position, and the face 17 is moved backward to move the sheet as shown in FIG. 3 (b). The load B is pulled together with the pallet A onto the fork claws 11 to carry out the load operation.

At this time, the frame 13 descends, the seat retainer 15 contacts the fork claw 11, and the lateral piece 21a of the sheet receiver 21 is located on the lateral piece 15a of the sheet gripper 15.

As shown in FIG. 3 (c), the pressing piece 22 is raised to release the sheet pallet A, the electric motor 26 is normally rotated to raise the frame 13, and the sheet retainer 15 and the sheet retainer 15 are moved as shown in FIG. 3 (d). By raising the sheet gripper 23, one end portion A'of the sheet pallet A is disengaged from the sheet receiver 21 and the sheet retainer 15 to be on the fork claw 11 as shown in FIG. 3 (e), and the electric motor 26 is operated in this state. By reversing and lowering the frame 13, as shown in FIG. 3 (f), the one end A'of the sheet pallet A is pressed by the sheet retainer 15 onto the fork claws 11 and grasped.

Thereafter, the face 17 is moved forward to leave the sheet pallet A on the fork claw 11 as shown in FIG.
You can extrude only.

Although the screw 28 is rotated in the above embodiment, the nut 25 may be rotated by the electric motor 26 via the speed reducer 27 to fix the screw 28 to the horizontal plate 24 as shown in FIG. The pinion may be rotated at 26 so that the pinion meshes with the rack provided on the horizontal plate.

[Effect of device]

By pulling the sheet pallet A together with the load B onto the fork claws 11 and raising the frame 13 while the sheet gripper 23 is released, the sheet gripper 23 and the sheet retainer 15
Of the sheet pallet A held by the sheet gripper 23 is disengaged from the sheet gripper 23 and placed on the fork claw 11. If the frame 13 is lowered in this state, the sheet retainer 15 moves the sheet pallet A of the sheet pallet A. The one end A'can be pressed against the fork claw 11 to be gripped.

Therefore, by moving the face 17 forward, only the load can be pushed out while leaving the sheet pallet A on the fork claw 11.

Moreover, since the frame 13 is moved up and down by the electric motor 26,
It is only necessary to electrically wire the electric motor 26 from the vehicle body side, the electric wiring does not hinder the forward field of view, and the load is not polluted by oil leakage, and the responsiveness can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is an overall perspective view, FIG. 2 is a front view of a lifting mechanism, and FIG.
(G) is an operation explanatory view, FIG. 4 is a front view showing a modified example of the lifting mechanism, and FIG. 5 is a front view of a conventional example. 10 is a lifting body, 11 is a fork claw, 13 is a frame, 14 is a lifting mechanism, 15 is a seat retainer, 16 is a moving mechanism, 17 is a face, 23 is a seat gripper, and 26 is an electric motor.

Claims (1)

[Scope of utility model registration request] 1. A fork claw 11 is provided on an elevator body 10 that is vertically movable on a vehicle body side, and a frame 13 is provided on the elevator body 10 so as to be vertically movable by an elevator mechanism 14 equipped with an electric motor 26. A seat retainer 15 is provided at a lower portion so as to face the fork claw 11, and a frame 17 is attached to the frame 13 by a moving mechanism 16.
A push-pull device for a cargo-handling vehicle in which a seat gripper 23 is provided below the face 17 so as to be movable back and forth.