JPS6139760Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fork control device for a forklift truck, and its purpose is to automatically hold the fork at a set angle, for example horizontally, during cargo handling operations. The purpose is to provide a control device.

Hereinafter, the present invention will be explained with reference to the drawings. In the drawing, 13 is a mast, and 14 is an operation valve for tilting the mast 13 inside the dart board. A plate 6 is attached to the tilt operation lever 4 of this operation valve 14. 5 is a stopper. A bracket 15 is attached to the upper surface of the operating valve 14.
is fixedly installed, and a leading rod 3 is provided on this bracket 15 so as to be movable up and down. The lower end of the leading rod 3 is connected to one end of a lever 18 via a link 17, and the other end of the lever 18 is connected to a bracket 19 of the mast 13 via a length-adjustable rod 2. These components constitute the movement direction conversion mechanism 20. That is, if the rod 2 moves in the direction A, the leading rod 3 moves in the direction a (upward), and if the rod 2 moves in the direction B, the leading rod 3 moves in the direction b (downward).

At the upper end of the leading rod 3, as shown in FIG. 4, there is a notch mechanism having a forced forward tilting slide surface 9, a forced backward tilting slide surface 10, a forced forward tilting notch 11, and a forced backward tilting notch 12. 21 is provided.

Next, the operation will be explained.

To change the mast from the rearward tilted state to the mast vertical state, that is, the fork horizontal state, first move the tilt operation lever 4 shown in FIG. 3 in seven directions and perform the forward tilt operation. At this time, the plate 6 is in contact with the backward tilting slide surface 10. The mast 13 gradually leans forward, and as the mast 13 moves forward, the leading rod 3 descends in the direction b as shown in FIG. In other words, since the leading rod 3, which is at the upper limit in the direction a, moves down in the direction b, the plate 6 of the tilt operating lever 4 is pushed by the forcibly tilting notch 12 of the leading rod 3, and the tilt operating lever 4 is moved downward. returns to neutral.

Furthermore, when the mast 13 becomes vertical, if the leading rod 2 is adjusted so that it is in the neutral state, the tilt lever 4 is mechanically returned to the neutral position so that the fork becomes horizontal, and the tilt operation is performed. The fork will now stop horizontally.

Conversely, when changing the mast from the forward tilted state to the vertical state, the tilt operating lever 4 is moved in seven directions and is moved downward to operate the mast backward. At this time, the plate 6 comes into contact with the forced forward tilting slide surface 9.

The mast 13 gradually tilts back from the forward tilted state. Then, the leading rod 3 rises in the direction a in accordance with the backward tilting movement of the mast. In other words, since the leading rod 3, which is at the lower limit in the b direction, rises in the a direction, the tilt operating lever 4 tries to return to neutral because the plate 6 of the tilt operating lever 4 is pushed by the forced forward tilt notch 11 of the leading rod. It stops when the mast 13 becomes vertical.

When the fork is horizontal, tilt control lever 4
Of course, if you keep it tilted in 7 directions, you cannot tilt it forward or backward.

By returning the tilt operating lever 4 to the 8 directions, normal forward and backward tilting operations are possible. Also Rod 2
By adjusting the length of the fork, it is possible to stop the fork at any angle other than the horizontal position. If you lengthen the rod length, you can tilt it forward by the length you extended it, and if you shorten it, you can tilt it backwards and stop.

In the present invention, the leading rod 3 is provided on the dash board so as to be movable up and down via a support member, the rod 2 is provided on the dash board so as to be movable back and forth via the support member, and the forward movement of the rod 2 is guided by the leading rod 3. It is connected to the rod 2 via a movement direction conversion mechanism 20 that converts the downward movement of the rod 3 and the backward movement of the rod 2 into the upward movement of the leading rod 3, and the rod 2 is connected to the mast 13. At the top of door 3, mast 1
Since the notch mechanism 21 is provided to forcibly move the tilt insertion lever 4 of the operating valve 14 from the forward and backward tilted positions to the neutral position by the vertical movement of the leading rod 3, the mast 13 can be tilted forward and backward. If the mast 13 is set at a predetermined angle by operating the tilt control lever 4 when the mast 13 is tilted in either direction, the tilt control lever 4 is forced to the neutral position when the mast 13 reaches the predetermined angle by operating the control valve 14. Since it is held, the fork can be automatically held at a set angle, for example, horizontally, during cargo handling operations.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a view taken from the direction of Fig. 2, Fig. 4 is a perspective view of the notch mechanism, and Fig. 5 is a tilt view. FIG. 6 is a plan view of a state in which the operating lever and the notch mechanism are linked. 2 is a rod, 3 is a leading rod, 4 is a tilt operating lever, 13 is a mast, 14 is an operating lever, and 21 is a notch mechanism.

Claims (1)

[Scope of utility model registration request] A leading rod 3 is provided on the dash board so as to be movable up and down via a support member, and a rod 2 is provided on the dash board so as to be movable back and forth via a support member. Rod 2 again in the downward movement
The rod 2 is connected to the rod 2 via a movement direction conversion mechanism 20 that converts the backward movement into the upward movement of the leading rod 3, and the rod 2 is connected to the mast 13. A notch mechanism 2 for forcibly moving the tilt operating lever 4 of the operating valve 14 from the forward or backward tilted position to the neutral position by the vertical movement of the leading rod 3.
1. A fork control device characterized by comprising: 1.