JPH03238299A - Device for clamping tire for forklift - Google Patents

Abstract

PURPOSE:To prevent tires from falling down when they are stacked by attaching a tire shift arm capable of moving in right and left directions at a position which is under a clamp holder and between clamp arms, and clamping a tire into a vertical attitude by laterally moving the projection of the shift arm. CONSTITUTION:A tire shift arm 26 is arranged at a position between clamp arms 18 and 20 and in the vicinity of a clamp holder 14. The shift arm 26 is of a planar shape extending in right and left directions normal to the holder 14, and to be guided and moved in right and left directions with a shaft 27 on the top surface. A plural number of small projections 32 are attached at intervals smaller than a tire width on the lower surface center line of the shift arm 26. When a plural number of tires 25 are placed side by side in a tilted attitude, a lift bracket 12 is lowered so that the small projections bite into the top portion of the tire 25, and the tires 25 are moved by shifting the shift arm 26, and the tires 25 made into vertical attitude and clamped in that attitude.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tire clamping device for a forklift used in tire cargo handling operations.

[Prior Art] FIG. 6 shows a conventional general tire clamp device mounted on a forklift. The illustrated tire clamp device 1 has a clamp holder 3 that is attached via a rotating device 2 to a lift bracket (not shown) that is raised and lowered along the mast of a forklift. A clamp arm 4 is attached to a clamp cylinder 5 so that the left and right spacing can be adjusted. Further, the clamp surface 6 of each clamp arm 4 is considerably larger than that of a roll clamp device or the like in order to clamp a large number of tires.

When using such a tire clamping device 1 to clamp vertically placed tires arranged in a horizontal direction, the rotating device f2 is driven to rotate the clamp holder 3 so that the clamping surface 6 is oriented horizontally, and then the clamp holder 3 is rotated. After inserting the lower clamp arm 4 under the tire, the interval between the clamp arms 4 is narrowed and the tire is clamped. After this,
When stacking tires vertically, the clamp holder 3 is rotated 90 degrees by the rotating device 2, the tire is placed in a predetermined position, and the clamp arm 4 is separated from the tire.

[Problem to be solved by the invention] Is the conventional tire clamp device as described above? In Ifl, when the tire 7 is in an inclined state as schematically shown in FIG. 7, the tire 7 can only be clamped in that state. Therefore, even if you try to stack the tires 7 vertically from this ramp state,
Rotate the clamp holder 3 90 degrees and attach the clamp arm 4.
When it is separated from the tire 7, there is a possibility that the load may collapse.

This problem can be avoided by performing the clamping operation after the tire 7 is vertically raised, but conventionally, human power or other equipment has been required for this tire straightening.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tire clamping device equipped with a mechanism for verticalizing an inclined tire.

[Means for Solving the Problem] In order to achieve the above object, a tire clamp device according to the present invention includes a clamp holder that is attached via a rotation device to the front surface of a lift bracket that is raised and lowered along a mast and extends forward. , a pair of front and rear clamp arms attached to the clamp holder so that the front and rear spacing can be adjusted;
a clamp cylinder for moving each of the clamp arms back and forth; a tire shift arm installed between the front and rear clamp arms and movable in the left and right directions below the clamp holder; and the tire shift arm. It is characterized by comprising a shift cylinder for moving the arm in the left and right lateral directions, and a holding means provided on the lower surface of the tire shift arm for holding the top of the peripheral surface of each tire.

[Function] In the above configuration, the tire can be clamped by the levers of the front and rear clamp arms. Also, if the tire to be clamped is tilted, the tire can be re-uprighted by use of a tire shift arm before clamping. That is, the lift bracket is lowered, the restraining means on the lower surface of the tire shift arm is engaged with the top of each tire, the tire shift arm and the top of the tire are integrally connected, and then the tire shift arm is moved from side to side. By doing so, the tire can be made vertical.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 show a tire clamping device according to the present invention. This tire clamping device 10 is connected to a lift bracket 12 of a forklift via a rotating device 11.
It has a clamp base 13 attached to the front surface of the clamp base 13, and a clamp holder 14 extends forward from the upper front surface of the clamp base 13. The clamp holder 14 consists of four rail holders 16 and 17 each having a U-shaped cross section and connected to each other by a connecting plate 15, two of which are arranged on the left and right and extend in the front-rear direction.

The front clamp arm 18 is attached to the outer rail holder 16.
A rail portion is attached via rollers 19 so as to be slidable in the front-back direction. Similarly, a rail portion of a rear clamp arm 20 is attached to the inner rail holder/I/der 17 so as to be slidable in the front and rear directions by rollers 21 .

Two clamp cylinders 22 are arranged between the inner rail holders 17 in the front-rear direction and in opposite directions to the mutual hair 1, and their piston ports 23 are connected to the front and rear clamp arms 18, respectively. .20 is connected.

Therefore, by hydraulically controlling these clamp cylinders 22, the clamp surfaces 23. of the clamp arms 18.20.
The front and back spacing between 24 can be adjusted.

A tire shift arm 26 for making the tire 25 vertical is provided at an intermediate portion of the front and rear clamp arms 18, 20, below the clamp holder 14, and at a position close to the clamp holder 14. The tire shift arm 26 has a flat plate shape and extends in the left and right directions, that is, perpendicular to the clamp holder 14. Further, two shafts 27 are attached to the upper surface of this tire shift arm 26 along the longitudinal direction of the tire shift arm 26, and these shafts 27
is the rail holder 16 outside the clamp holder 14.
The shaft holder 28 is slidably inserted into a hole in the shaft holder 28 fixed to the shaft holder 28 . One shift cylinder 29 is arranged parallel to the shaft 27 between the clamp holder 14 and the tire shift arm 26, and its cylinder tube 30
is fixed to one shaft holder 28, and the tip of the piston rod 31 passes through the other shaft holder 28 and is fixed to the upper surface of the tire shift arm 26 via a piece or the like. Therefore, by hydraulically controlling this shift cylinder 29, the tire shift arm 26 can be moved in the left and right lateral directions.

Furthermore, on the center line of the lower surface of the tire shift arm 26,
A plurality of small projections 32 are provided at appropriate intervals, preferably at intervals smaller than the width of the tire 25.

The length of the tire shift arm 26 is set so that the clamping surface 2 is such that all the tires 25 that can be clamped by the clamp arm 18.20 can be arranged in a vertical state.
Preferably, the length is substantially the same as 3.24.

Next, the tire clamp device 1 configured as described above will be described.
A plurality of tires 25 placed in an inclined state using 0
Regarding the case where two lamps are used, the fourth conceptual diagram of the present invention
The explanation will be made with reference to the figures and FIG. 5 as well.

As shown in FIG. 4, when a plurality of tires 25 are arranged side by side in a tilted state in the tire rack 33, first, the forklift main body and the lift bracket 12 are operated to place the tire clamp device 10 above the tires 25. The tire shift arms 26 are arranged, and the longitudinal direction of the tire shift arms 26 is aligned with the direction in which the tires 25 are juxtaposed. Next, the tire clamp device 10 is lowered by lowering the lift bracket 12, and the small protrusion 32 of the tire shift arm 26 bites into the top of the circumferential surface of each tire 25.

When the tire shift arm 26 is moved inward to the left in FIG. 4 by operating the shift cylinder 29 while holding the top of the tire in this way, the top of the tire 25 is moved to the small protrusion 32.
Since it is integrated with the tire shift arm 26, each tire Z5 moves as the tire shift arm 26 moves.
tilts inward to the left about its lower end, and assumes the vertical position shown in FIG. After this, the front and rear clamp arms 18.
The clamp cylinder 22 is controlled in the direction of closing the tire 25, and the tire 25 is clamped by the clamp surfaces 23 and 24 of the clamp arms 18 and 20.

If the clamping of the tire 25 is not completed, the tire clamping device 10 is raised and carried to a predetermined position, and the rotating device 11 is driven to rotate the clamp holder 14 by 90 degrees. After that, the tire clamping device 10 is lowered and the lowest tire 25 is brought into contact with the ground, and the interval between the clamp arms 18 and 20 is widened, so that the tires 25 can be vertically stacked without collapsing.

In the above embodiment, a small protrusion 32 is provided on the lower surface of the tire shift arm 26 and is used as a means for restraining the tire 25. Various means other than the small protrusion 32 can be considered. For example, in order to generate a large amount of friction between the tire shift arm 26 and the tire 25 when the tire shift arm 26 comes into contact with the tire 25, the entire lower surface of the tire shift arm 26 may be made into a friction surface, or the lower surface of the tire shift arm may be made into a corrugated surface. There are ways to do this.

Furthermore, the structure of the movable part of the tire shift arm 26 is not limited to the shaft sliding type using the shaft 27, and as in the relationship between the clamp arm 18.20 and the clamp holder 14, a roller moves inside the U-shaped rail holder. It may also be configured to roll.

[Effects of the Invention] As described above, according to the present invention, tires that are leaning diagonally can be clamped after being made vertical, so when the tire clamping device is rotated 90 degrees to stack tires. There is no need to worry about the load collapsing.

In addition, conventionally, tires were vertically re-erected using human power or other equipment, but since the tire-erecting and clamping operations can be performed using only the tire clamping device according to the present invention, work efficiency is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tire clamping device according to the present invention, FIG. 2 is a side view showing the tire clamping device of FIG. 1 attached to a forklift, and FIG. 3 is A-A in FIG. 2.
4 and 5 are schematic explanatory diagrams showing the procedure for verticalizing an inclined tire using the tire clamping device of the present invention, and FIG. 6 is a cross-sectional view taken along the line, and FIG. The perspective view and FIG. 7 are schematic illustrations showing a state in which a tilted tire is clamped using a conventional tire clamping device. In the figure, 10... Tire clamp device 11... Rotating device 12... Lift bracket 14... Clamp holder 1820... Clamp arm 22... Clamp cylinder 26... Tire shift arm 27...・Shaft 28...Shaft holder 29...Shift cylinder 32...Small protrusion

Claims (1)

[Claims] A clamp holder that is attached to the front surface of a lift bracket that is raised and lowered along the mast via a rotating device and extends forward; a pair of front and rear clamp arms that are attached to the clamp holder so that the front and back spacing can be adjusted; and each of the clamp arms. a clamp cylinder for moving the tire back and forth, a tire shift arm that is attached to the lower side of the clamp holder between the front and rear clamp arms so as to be movable in the left and right directions; A tire clamping device for a forklift, comprising a shift cylinder for moving the tire in the direction, and a holding means provided on the lower surface of the tire shift arm for holding the top of the circumferential surface of each tire.