JPH0620995B2 - Forklift shift fork device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift fork device that causes a fork of a forklift to approach and separate (shift fork operation).

2. Description of the Related Art A shift fork device for a forklift is, for example, as disclosed in Japanese Utility Model Publication No. 43-25234, in which forks are directly hooked on upper and lower finger bars of a carriage that moves up and down along a left and right mast unit. The shift cylinder is arranged so as to straddle between the fork and the carriage, and the carriage itself constitutes a shift fork device.

Problems to be Solved by the Invention Since the carriage itself is a shift fork device, the carriage must be attached to and detached from the mast unit to attach and detach the shift fork device, and workability is extremely poor. Specifically, when the forklift is divided into a general-purpose type and a shift fork type, the entire carriage has to be replaced each time, and the workability is extremely poor.

Therefore, the present invention provides a shift fork device for a forklift truck, which can be attached / detached without attaching / detaching a carriage and can greatly improve workability.

Means for Solving Problems A shift bracket is formed by connecting upper and lower beams with side ribs on at least both sides, and upper and lower guide shafts are provided between the side ribs on both sides. A pair of forks is slidably attached to the side ribs, and a shift cylinder is provided across the side ribs and the forks to move the forks toward and away from each other. And
A flange is formed downward on the trailing edge of the upper beam of the shift bracket, and the shift bracket is hooked on the upper finger bar of the carriage through the bracket.

Action By driving the shift cylinder, the pair of forks act as a shift fork in the approaching direction or the separating direction. The shift bracket is attached to and detached from the mast unit without attaching and detaching the carriage and the shift cylinder by attaching the flange of the upper beam to the upper finger bar of the carriage.

Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1-3, 1 indicates a shift bracket,
It is composed of upper and lower beams 2 and 3 and side ribs 4 and center ribs 5 on both sides connecting these upper and lower beams 2 and 3. An upper and a lower guide shaft 6 are laid across the center rib 5 between the side ribs 4, 4 on both sides, and a pair of forks 7 are provided on the upper and lower guide shafts 6.
Is attached so that it can slide freely. Also, these side ribs 4
A shift cylinder 8 is provided across the fork 7 and the fork 7 to operate the fork 7 in the approaching direction or the separating direction. A flange 9 is bent downward at the rear edge of the upper beam 2 of the shift bracket 1, and the shift bracket 1 is attached to the upper finger bar 17 of the carriage 16 via the flange 9. . The lower side of the shift bracket 1 is provided with a jaw 10 on the rear surface of the lower beam 3 with the lower beam 3 in contact with the front surface of the lower finger bar 18 of the carriage 16.
A bolt 11 is attached via a, and the jaw 10 is used to prevent steadying. In FIG. 1, 12 is a bolt on the side surface of the side rib 4.
13 is a backrest to be mounted, 14 is a liner inserted in the guide shaft 6 insertion portion of the fork 7, and 15 is a hydraulic oil pipe of the shift cylinder 8.

According to the apparatus of the above-described embodiment, by driving the shift cylinder 8, the pair of forks 7 operate along the upper and lower guide shafts 6 and 6 in the approaching direction or the separating direction.

Here, when attaching / removing the shift fork device to / from the mast unit (not shown), the fork 7 is attached to the shift bracket 1.
And the shift cylinder 8 is sub-assembled so that the shift fork device is constructed as a unit, and the shift bracket 1 is hooked on and off to the carriage 16 upper finger bar 17 via the flange 9 at the trailing edge of the upper beam 2. Since it is possible to do so, the workability can be remarkably improved without attaching and detaching the carriage to and from the mast unit and attaching and detaching the shift cylinder to and from the carriage.

Further, since the upper beam 2 of the shift bracket 1 is also used as a hook for hanging on the upper finger bar 17 of the carriage 16, the input from the fork 7 should be directly applied to the carriage 16 from the upper beam 2. You can In other words, since the load burden on the shift bracket 1 is relatively small, the shift bracket 1 can be thinned as a whole, and the cargo handling capability and the operator's front view can be improved.

As described above, according to the present invention, the fork and the shift cylinder are sub-assembled into the shift bracket to form the shift fork device as a unit, and the flange formed at the trailing edge of the upper beam of the shift bracket is also used. Since the shift bracket can be attached to the upper finger bar of the carriage through the, the attaching / detaching work does not involve attaching / detaching the carriage to / from the mast unit or attaching / detaching the shift cylinder to / from the carriage. , The workability can be greatly improved. Further, as described above, the upper beam of the shift bracket itself functions as a hook for hanging on the carriage, so that the input from the fork can be directly applied to the carriage, and the load burden on the shift bracket can be reduced. As a result, it is possible to reduce the thickness and weight of the shift bracket as a whole, and it is possible to improve the cargo handling capability and the forward visibility, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a front view of the same assembled state, and FIG. 3 is a side view of the same. 1 ... shift bracket, 2 ... upper beam, 3 ... lower beam, 4 ... side ribs, 6 ... guide shaft,
7 ... fork, 8 ... shift cylinder, 9 ... flange, 16 ... carriage, 17 ... upper finger bar.

Claims (1)

[Claims] 1. A shift bracket is formed by connecting upper and lower beams with side ribs on at least both sides, and upper and lower guide shafts are laid between the side ribs on both sides to form a pair of upper and lower guide shafts. The fork is mounted slidably, and a shift cylinder is arranged across the side rib and the fork to move the fork toward and away from the fork. On the other hand, a flange is formed downward at the trailing edge of the upper beam to provide a shift bracket. A shift fork device for a forklift, which is characterized in that it is attached to the upper finger bar of the carriage through this flange.