JPS6330280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a fork mounting method for a forklift with a sinking fork device, which is mainly used for transporting motor boats and the like on a quay.

Prior Art In a conventional forklift with a sinking fork device, as shown in FIG. 7, a lift bracket 42 is fixed to the upper end of a sinking mast 41, and guides are rotatably supported on both left and right sides of the lift bracket 42. The roller 43 is housed in an inner guide groove 44a of an inner mast 44 mounted on the forklift side, so that the sinking mast 41 can be moved up and down along the inner mast 44. However, the mounting structure of this sinking mast is
Since the sinking mast 41 and the lift bracket 42 are fixed to each other, equipment such as a crane is not only required when attaching and detaching the sinking mast 41 to the inner mast 44, but also the work of attaching and detaching the mast must be done at a high place. It was very dangerous because it had to be done. Furthermore, because the height of the mast of a forklift with a submerged fork device is higher than that of a general forklift used on flat ground, a storage building with a special high roof is required, and it is generally left outdoors. In this case, the defect was that the machine was damaged more quickly.

Purpose of the Invention The present invention was made in order to eliminate the deficiencies existing in the above-mentioned prior art, and its purpose is to eliminate the need to use equipment such as a crane for the installation work of sinking forks, and to eliminate the need for the installation work of sinking forks. To provide a method for attaching a fork to a forklift with a sinking fork device, which allows work to be carried out safely and further reduces restrictions on the storage location of the forklift.

Composition of the Invention In order to achieve the above object, the present invention provides a locking mechanism provided at the upper end of the lift bracket, which is attached to a mast on the side of the vehicle body frame so as to be movable up and down, when the lift bracket is moved to the lower side of the mast. A sinking mast equipped with a fork is rotatably and removably connected to a first locking portion such as a hole, and then the lift bracket is raised to center around the first locking portion. By rotating, the sinking mast is erected, and the forklift is moved to a stepped area, where the lift bracket is moved to the lower side of the mast on the vehicle body frame side, and the locking hole provided at the lower end of the lift bracket is moved. A method is adopted in which the mast is removably connected to the second locking portion at a position below the upper end of the sinking mast.

Embodiment Hereinafter, an embodiment embodying the present invention is shown in FIGS.
Referring to FIG. 5, a front wheel 2 is attached to the front end of the vehicle body frame 1, and a rear wheel 3 is attached to the rear end. A pair of left and right outer masts 4 are attached to the front end of the vehicle body frame 1 via a front axle (not shown) so as to be tiltable in the front and rear direction by a tail cylinder 5, and both outer masts 4 have upper and lower parts (not shown). They are connected to each other by tie beams. Further, the outer mast 4
A pair of left and right inner masts 6 are mounted inside the outer mast 4 so as to be movable in the vertical direction, and are connected to each other by upper and lower tie beams (not shown). Further, a lift bracket 7 is attached to the pair of left and right inner masts 6 so as to be movable up and down along the inner masts,
A pair of upper and lower guide rollers 8 are rotatably supported on both left and right sides of the lift bracket 7, and are accommodated in the guide groove 6a of the inner mast 6. Further, a guide roller 9 is rotatably supported on the side surface of the lift bracket 7 so as to be in rolling contact with the guide groove bottom surface 6b of the inner mast. In order to move the inner mast 6 up and down, the lift bracket 7 includes a lift cylinder (not shown) in which the upper end of the piston rod is connected to the inner mast, and a sprocket rotatably supported on one side of the inner mast 6. one end is fixed to the cylinder body of the lift cylinder and the other end is fixed to the lift bracket 7.
The inner mast 6 is fixed to the sprocket wheel, and the inner mast 6 is raised and lowered at a speed twice that of the raising and lowering speed of the inner mast 6 by a lifting mechanism constituted by a chain (not shown) whose intermediate portion is hung on the sprocket wheel. .

Next, the sinking fork device which is removably attached to the lift bracket 7 will be explained. Mast 1
Connecting plates 13 are welded and fixed to the upper rear surface of the 0 in parallel to each other in the vertical direction, and the lift bracket 7 is fitted between both connecting plates 13. In this fitted state, the lift bracket 7
A locking hole 7 as a first locking portion is provided at both upper and lower ends of the
A and a locking hole 7b as a second locking part are transparently provided, and the locking hole 7a,
A locking hole 13a and a locking hole 13b are transparently provided corresponding to the hole 7b. When the lift bracket 7 is fitted between the connecting plates 13, the connecting pin 14A passes through the locking holes 7a and 13a, and the connecting pin 1 passes through the locking holes 7b and 13b.
4B, the sinking mast 10 is communicated with the lift bracket 7.
Further, the connecting pins 14A and 14B are fixed to the connecting plate 13 by bolts 15.

A lift bracket 1 is attached to the sinking mast 10.
6 is mounted so as to be movable in the vertical direction along the mast 10, and a guide groove 10a formed inside the sinking mast 10 is formed on the side surface of the lift bracket 16.
A pair of upper and lower guide rollers 17 that move inside are rotatably supported. The lower tie beam 12 is equipped with a lift cylinder 18 for raising and lowering the fork.
A support shaft 20 is horizontally fixed to the upper end of the rod 19, and sprocket wheels 21 are rotatably supported at both left and right ends of the support shaft 20, and the fork lifting lift A pair of chains 22 each having one end fixed to the upper end of the cylinder body of the cylinder 18 and the other end fixed to the lift bracket 16 are hung on the pair of sprocket wheels 21, respectively. When the rod 19 of the fork elevating lift cylinder 18 moves up and down, the lift bracket 16 is moved up and down. Said lift bracket 1
Two finger bars 23, upper and lower, are fixed to the front surface of the finger bar 6, and a fork 24 is attached to the finger bars.

On the other hand, mounting plates 25 (only one is shown) are welded and fixed toward the front on the outer surface of the outer mast 4, and support plates 27 that are tightened and fixed to these mounting plates 25 with bolts 26 are attached to the mounting plates 25. , a guide groove 10 formed on the outside of the sinking mast 10;
Guide rollers 28 that relatively move within b are rotatably supported. The guide roller 28 receives a part of the force acting on the sinking mast 10 in the longitudinal direction, so that the sinking mast 10 can be stably moved up and down.

As shown in FIG. 3, a conduit 29 for supplying oil or electric current is provided on the side surface of the lift bracket 7, and a conduit 29 for supplying oil or electric current is also provided on the back side of the sinking mast 10. 30 is arranged, and a flexible tube 31 is connected to the distal end portions of both conduits 29 and 30.

Next, a method for attaching a fork to a forklift with a sinking fork device configured as described above will be described.

First, as shown in FIG. 4, with the inner mast 6 and the lift bracket 7 moved to the lowest position and stopped, the sinking mast 10 supported on the trolley 32 in an almost horizontal position is placed in front of the lift bracket 7. the locking hole 13a of the connecting plate 13.
The cart 32 and the sinking mast 10 are moved until the locking hole 7a of the lift bracket 7 and the bottom line are aligned with each other. Then, the connecting pin 14A is inserted into the locking holes 7a, 1.
3a and is tightened and fixed to the connecting plate 13 with bolts 15, the flexible tube 31 is connected to the tips of the conduits 29 and 30. Next, when the inner mast 6 and lift bracket 7 are raised, the sinking mast 10 is raised while being rotated counterclockwise in FIG. When moved to the moving position (see Figure 1), the sinking mast 10 is held in a hanging position and the lift bracket 7
The locking hole 7b and the locking hole 13b of the connecting plate 13 match. Here, the connecting pin 14B is not yet inserted into the locking holes 7b and 13b, and the support plate 2 is inserted into the mounting plate 25.
7 is fixed, and the guide roller 28 is fitted into the guide groove 10b of the sinking mast 10 to hold the sinking mast 10 so as not to rotate back and forth about the connecting pin 14A.

Furthermore, in this state, the forklift is operated to stop moving to the stepped ground as shown in FIG. With the lift bracket 7 and the connecting plate 13 in the lowest moving position, insert the connecting pin 14B into the locking holes 7b and 13b, and use the bolt 15 to move the connecting pin 14B to the connecting plate 13. Fixed to.

As described above, the attachment of the sinking fork device to the lift bracket 7 is completed, but in this embodiment, the lift bracket 7 is held in the lowest position and the sinking mast 10 is tilted sideways. Locking hole 7 of connecting plate 13
a, 13a, and then lift the lift bracket 7 to lower the sinking mast 10.
After setting the lift bracket 7 to the vertical position, move the lift bracket 7 to the lowest position again on the stepped ground, and then insert the connecting pin 14B into the locking hole 7b of the lift bracket 7 and the locking hole 13b of the connecting plate 13. Since the fork 24 is inserted, the fork 24 can be installed very easily and safely in a low place without requiring any equipment such as a crane. or,
When storing the forklift indoors, the sinking fork device can be removed from the lift bracket 7 by performing the operation completely opposite to the above-mentioned installation method, thereby easing restrictions on the installation location of the forklift. The invention can also be embodied in the following embodiments.

(1) As shown in FIG. 6, a connecting plate 13' having the same function as the connecting plate 13 described above is welded and fixed to the pair of upper and lower finger bars 23, and when the sinking fork device is not used, the finger bar 23 and to attach the fork 24 to the lift bracket 7 so that it can be used as a normal forklift. In this case, there is an advantage that the forklift machine base can be versatile.

(2) In the above embodiment, the lift bracket 7 and the connecting plate 13 are connected by locking holes 7a, 13a, 7 at two places, upper and lower.
b, 13b and connecting pins 14A, 14B, respectively, but this locking means should be a hook type or other locking mechanism.

Effects of the Invention As detailed above, the present invention allows forks to be easily installed without requiring any special equipment such as a crane, and this installation work can be performed safely on the ground. Furthermore, it has the effect of easing restrictions on storage locations for forklifts.

[Brief explanation of the drawing]

Fig. 1 is a side view of a forklift showing an embodiment embodying the present invention, Fig. 2 is an enlarged exploded perspective view of the main parts, and Fig. 3 is an enlarged side view of a portion near the lift bracket attached to the inner mast. 4 and 5 are side views for explaining the installation method of the sinking fork device, FIG. 6 is a perspective view of the fork with the sinking mast omitted, and FIG. 7 is a partial perspective view showing a conventional example. It is. Lift bracket...7, Locking hole...7a, 7
b, Mast for sinking...10, Connecting plate...13, Locking hole...13a, 13b, Connecting pin...14A,
14B.

Claims (1)

[Claims] 1. With the lift bracket mounted on the mast on the vehicle body frame side capable of being raised and lowered moved to the lower side of the mast, insert the fork into the first locking portion such as a locking hole provided at the upper end of the lift bracket. rotatably and removably connects a sinking mast equipped with a sinking mast, and then erects the sinking mast by raising the lift bracket and rotating it about the first locking part; Furthermore, the forklift is moved to a stepped area, and there, the lift bracket is moved to the lower side of the mast on the side of the vehicle body frame, and the fork lift bracket is moved to a second locking part such as a locking hole provided at the lower end of the lift bracket, and A method for attaching a fork to a forklift with a sinking fork device, characterized in that the fork is removably connected at a position below the upper end of a mast.