JPH024520B2 - - Google Patents

Description

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

(Prior Art) Generally, tires are transported by a forklift with the lower part of the stacked tires T being clamped from both sides by left and right clamp arms 4, as shown in FIG. At that time, the upper part of the tire simply remains on the vehicle as shown in the figure.

(Problem to be solved by the invention) Therefore, if there is a limit to the height of the ceiling, such as at a factory entrance or a container entrance, the stacking height of tires is naturally restricted. Therefore, the actual loading capacity cannot be demonstrated. In particular, when loading a container, since the entrance 26 of the container C is lower than the ceiling inside the container C as shown in the figure, the container C
The reality is that the cars are loaded with a space about the size of one tire left at the top. Therefore, the loading efficiency of tires is poor, and moreover, the tires dance inside the container due to vibration during transportation, causing the stacked position to collapse and making it difficult to unload the tires at the destination. Ta. Furthermore, even during normal transportation using a forklift, there was a problem in that the upper part, which was not clamped by the clamp arm, caused the load to collapse due to vibration.

(Means for Solving the Problems) In order to eliminate the above-mentioned conventional drawbacks, the present invention provides a tire clamping device for a forklift that clamps the upper left and right edges of stacked upper tires from both sides. a pair of left and right stabilizers disposed above the clamp arm for elastically compressing the overall height of the tire by pressing the tire downward; and means for opening/closing and raising/lowering the left and right stabilizers. It is structured as follows.

(Function) The stabilizer for holding down the tire is activated prior to the clamping action of the tire by the clamp arm. That is, with the forklift positioned so that the left and right stabilizers are on both sides above the stacked tires, the opening/closing and elevating means for the stabilizers is operated to move the left and right stabilizers in the direction of closing (approaching direction) to each other. By moving it upward and lowering it, it engages with the upper peripheral edge of the topmost tire from both sides and presses the tire downward. Then, the stacking height of the tires is lowered by the pressing action of the stabilizer, and the lower part of the tire is clamped by the clamp arm to transport the tire.

Example 1 Example 1 of the present invention will be specifically described below with reference to FIGS. 1 to 4.

In the figure, 1 is a lift bracket that is raised and lowered along a mast 2 in a forklift, and a clamp base 1 is attached to the lift bracket 1.
Two rail holders 3 each having a groove-shaped cross section are fixed horizontally to the upper and lower parts of the front surface of the rail 7. A pair of left and right clamp arms 4 disposed in front of the lift bracket 1 have a tire clamp part 5 on the front end side which is large in length and has an appropriately curved inner surface, and has tire clamp parts 5 on the upper and lower parts of the base side. each has a laterally extending rail portion 6, and the rail portion 6 is connected to the rail holder 3.
is supported so as to be slidable in the left-right direction via rollers (not shown). Two clamp cylinders 7 that open and close the clamp arm 4 are disposed laterally in the space between the upper and lower rail holders 3, and one end is connected to the lift bracket 1.
The other end is connected to the clamp arm 4.

A pair of left and right stabilizers 8 are disposed above the left and right clamp arms 4 to hold down the upper peripheral edge of the top tire of the stacked tires T. Stabilizer 8 is the left and right clamp arm 4
The tire consists of a support 9 that is vertically movably supported by a guide 11 having a T-groove cross section formed on the back surface of the tire clamp section, and a tire pressing section 10 formed at the upper end of the support 9. The pressing part 10 is curved inward in a substantially dogleg shape so that it can engage with the upper peripheral edge of the tire T without protruding from the upper surface of the tire, and its curved inner end is curved. There is. Note that 8a is a rib formed on the back surface of the support column 9 and the tire pressing section 10, and is intended to improve the strength. The two left and right lifting cylinders 12 that move the left and right stabilizers 8 up and down have lower ends that are closer to the clamp arm 4 than the pin 13.
The upper end is connected to the bracket 14 of the stabilizer 8 by a pin 15.

This embodiment is configured as described above,
The effect will be explained below.

When clamping tires T stacked on the floor, the stacked tires T should be clamped using the left and right clamp arms 4.
With the forklift positioned at the center between the forklifts, first operate the left and right clamp cylinders 7 to move the left and right clamp arms 4 along the rail holder 3 towards the tire T side. Since the left and right stabilizers 8 are also moved in the same way, when the tire pressing portion 10 of the stabilizer 8 moves to just above the upper circumferential edge of the tire T, it is temporarily stopped. Next, by operating the left and right lifting cylinders 12, the stabilizer 8 is lowered, and the tire pressing part 10 is engaged with the upper peripheral edge of the uppermost tire T.
When this is pressed down, the stacked tires T subjected to the compressive force will have their stacked height reduced. In this case, if the above compression force is 800Kg/ ^cm2 , it is possible to reduce the number of stacked tires T by about one when there are nine, so it is possible to stack 10 tires, which is one more than before. This is effective when passing through places with low ceilings such as factories and containers.

In this way, after the pressing action by the stabilizer 8, the left and right clamp cylinders 7 are operated again to clamp the lower part of the tire T by the tire clamp part 5 of the clamp arm 4, but at this time, the lower end of the tire clamp part 5 is The formed receiving piece 5a receives the lower peripheral edge of the lowest tire. Then, in this state, move the entire clamping device to the lift bracket 1.
It is then transported after raising it to an appropriate height.
In this case, since the tires T are clamped not only from the left and right directions but also from the top and bottom, the cargo is transported in a stable position without collapsing (see FIG. 4).

In addition, after transporting the tire T, the clamp cylinder 7
By moving both the clamp arm 4 and the stabilizer 8 in the opening direction, the clamp on the tire T can be released.

Example 2 Next, Example 2 of the present invention will be described based on FIGS. 5 and 6. In this embodiment, two left and right lifting guides 16 each having a groove-shaped cross section are installed on the front surface of the lift bracket 1, and the left and right clamp arms 4 are attached to a clamp base 17 fixed to the lower front side of the lifting guides 16. It has the same configuration as the first embodiment and is installed so as to be openable and closable, while on the upper side, left and right stabilizers 8 having a substantially doglegged shape are installed via a stabilizer holder 18 so that they can be opened and closed and raised and lowered. The stabilizer holder 18 consists of a base plate 19 that is attached to the lift guide 16 via rollers (not shown) so as to be able to move up and down, and rail guides 20 that are fixed laterally to the top and bottom of the front surface of the base plate.
Upper and lower rails 21 fixed to the base of the stabilizer 8 are fitted so as to be slidable in the left-right direction. The two left and right opening/closing cylinders 22 for opening and closing the stabilizer 8 are arranged between the upper and lower rail guides 20, and one end is connected to the base plate 1.
9, and the other end is connected to the stabilizer 8. Further, an elevating cylinder 23 for vertically moving the stabilizer 8 is disposed between the left and right elevating guides 16, and has a lower end connected to a clamp base 17 and an upper end connected to a base plate 19.

As described above, in the second embodiment, the opening/closing operation of the stabilizer 8 can be performed independently of the opening/closing operation of the clamp arm 4, and therefore, the opening/closing cylinder 22 and the lifting cylinder 23 can be operated respectively. Therefore, by operating the clamp cylinder 7 while the stabilizer 8 is holding down the uppermost tire periphery of the stacked tires T, the tire T can be clamped and transported by the clamp arm 4. .

Example 3 Next, Example 3 of the present invention will be explained based on FIG. 7. As shown in the figure, in this embodiment, a bar 24 for interlocking is provided vertically on the stabilizer 8 in the second embodiment, and the bar 24 is formed in a groove shape with a T-shaped cross section on the back surface of the clamp arm 4. By fitting the stabilizer 8 into the vertically movable guide 25, the stabilizer 8 opens and closes together with the clamp arm 4, and the opening/closing cylinder is omitted. Therefore, in this embodiment, the stacked tires T can be clamped by functioning in the same manner as in the first embodiment, and in particular, the number of cylinders is reduced compared to the first and second embodiments.

(Effects of the Invention) As described above, the present invention provides a tire clamping device for a forklift, in which a pair of stabilizers are provided above the clamp arm to hold down the upper peripheral edge of the topmost stacked tire. By clamping the stacked tires, the posture of the stacked tires can be maintained stably during transportation to prevent the load from collapsing, and the stacked tires can also be compressed to lower their height. Because it can be transported, it is effective when passing through places with ceiling height restrictions, such as factories and container entrances. In other words, in the case of a clamping device that does not have a stabilizer, the stacking height of tires must be adjusted to a low-ceilinged area such as the entrance of a factory or container, but according to the device of the present invention, the compression by the stabilizer is Since the height can be made lower than the actual height, it is possible to increase the number of stacked tires and improve transportation efficiency.Especially when stacking into containers, stacking that exceeds the height of the entrance/exit is possible. This makes it possible to load tires of different heights, improving loading efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a tire clamping device according to a first embodiment of the present invention, Fig. 2 is a side view, Fig. 3 is a partially cutaway plan view, and Fig. 4 is a front view showing a mode of clamping stacked tires. , FIG. 5 is a perspective view showing the tire clamping device of the second embodiment, FIG. 6 is a partially cutaway side view, FIG. 7 is a perspective view showing the tire clamping device of the third embodiment, and FIG. 8 is a conventional example. FIG. 1... Lift bracket, 2... Mast, 4...
...Clamp arm, 7...Clamp cylinder, 8
... Stabilizer, 9 ... Support section, 10 ... Tire pressing section, 11 ... Guide, 12 ... Elevating cylinder, 16 ... Elevating guide, 17 ... Stabilizer holder, 23 ... Opening/closing cylinder, 24 ... Elevating Cylinder.

Claims (1)

[Scope of Claims] 1. A tire clamping device comprising a pair of left and right clamp arms that are attached to the front surface of a lift bracket that can be opened and closed to be moved up and down along a mast, the device being equipped with a pair of left and right clamp arms that are attached to the left and right edges of stacked upper tires. A pair of left and right stabilizers are disposed above the clamp arm to compress and retract the entire height of the tire by engaging the upper part from both sides and pressing the tire downward; A tire clamping device for a forklift equipped with means for raising and lowering. 2. The means for opening/closing and raising/lowering the stabilizer includes a guide provided on the back surface of the left and right clamp arms for vertically movably supporting the left and right stabilizers, and a stabilizer mounted on the left and right clamp arms, respectively. 2. The lift bracket according to claim 1, further comprising: a lift cylinder for vertically moving the lift bracket; and a clamp cylinder attached to the lift bracket for opening and closing the clamp arm and the stabilizer. Tire clamp device on forklift. 3. The means for opening/closing and raising/lowering the stabilizer includes a stabilizer holder that supports the left and right stabilizers so that they can slide horizontally, an opening/closing cylinder that is attached to the stabilizer holder and opens and closes the stabilizer, and a means that supports the stabilizer holder so that it can move up and down. A tire clamping device for a forklift according to claim 1, characterized in that the device comprises a lifting guide provided upright in front of a lift bracket and an lifting cylinder for vertically moving a stabilizer holder. 4. The means for opening/closing and raising/lowering the stabilizer includes a stabilizer holder that supports the left and right stabilizers so as to be able to slide left and right, a bar that connects the stabilizer and the clamp arm so that they open and close in conjunction with each other, and a stabilizer. Consists of a clamp cylinder that also opens and closes the clamp arm, a lift guide installed in front of the lift bracket to support the stabilizer holder in a vertically movable manner, and a lift cylinder that moves the stabilizer up and down. A tire clamping device for a forklift according to claim 1, characterized in that: