JPH0133598Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hinged device for a forklift whose main work is the handling of long objects such as wood.

A hinged fork, which is one of the attachments in a forklift, is used to hold and transport wood, etc. However, because the load is long, the left and right balance is easily lost, and when sudden braking occurs, the hinge There is a risk of falling, and there are problems with stability during transportation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hinged device for a forklift that is improved so as to further press down a load held by a fork from above, in order to eliminate the above-mentioned conventional problems.

Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in the figure, a pair of left and right lift brackets 2 that are moved up and down along a mast 1 have protrusions 2 at the top, middle, and bottom so as to form an approximately E shape.
a, 2b, and 2c are provided, respectively, and the protrusion amount of these protrusions 2a, 2b, and 2c gradually increases from the upper part to the lower part. A finger bar 4 for supporting a fork 3 is pivotally attached to the lower protrusion 2c of the lift bracket 2 by a pin 5 so as to be tiltable back and forth, and an engaging portion 4a is provided on the rear side of the upper end of the finger bar 4. protrudes straight upwards. This engaging portion 4a
may be formed over the entire width of the finger bar 4, or may be formed in an appropriate number in the width direction, for example, on each side. Left and right lift brackets 2
A dump cylinder 6 for damping the fork 3 is arranged vertically on the front side of the middle part of the fork 3. It is pivotally connected to a bracket 8 protruding from the middle part of the rear surface of the Gerber 4 by means of a pin 9.

Further, a backrest 10 is pivotally attached to the intermediate protrusion 2b of the lift bracket 2 at a position slightly lower than the center portion by a pin 11 so as to be able to be raised and lowered.

The backrest 10 is formed into a substantially curved shape, and its upper end extends forward, and its lower end abuts or is capable of abutting against the back surface of the engaging portion 4a of the finger bar 4. ing. The backrest 10 is always urged in the upright direction by a tension spring 12 stretched between the upper side of the backrest 10 and the upper protrusion 2a of the lift bracket 2, and by a stopper 13 formed on the intermediate protrusion 2b. It is held in an upright position regulated by
The backrest 10 is constructed with a pair of left and right arms or a lattice-shaped frame, but in any case, consideration is given to its manufacture so as not to obstruct the forward field of view.

This embodiment is configured as described above,
Therefore, when the dump cylinder 6 is extended and the fork 3 is tilted upward via the finger bar 4 in order to pick up a load 14 such as wood by the fork 3, the engaging portion 4a of the finger bar 4 is brought into contact with the backrest. In order to push the lower end of 10 backwards,
The backrest 10 can be tilted forward against the tension spring 12 to press down the load 14 on the fork 3 from above. That is, back crest 10
is tilted in conjunction with the upward tilting movement of the finger bar 4, and can be pressed down depending on the amount of load on the fork 3 within the range of the maximum upward angle of the fork 3 (usually set to about 35 degrees). Yes, it is possible (see Figures 2 and 3).

In this case, in this embodiment, the point of contact between the finger bar 4 and the backrest 10 is set close to the pivot point of the backrest 10, so the backrest 1
0 is performed more quickly than the upward tilting movement of the finger bar 4 in the initial stage, and the corresponding contact point gradually moves away from the pivot point of the backrest 10 as the upward tilting movement of the finger bar 4 progresses. The tilting operation is gradually slowed down and the holding operation is performed at a slow speed that does not damage the load 14.

When the dump cylinder 6 is retracted to direct the fork 3 downward for unloading, the backrest 10 is pulled up by the tension spring 12 and held in the upright position defined by the stopper 13.

Note that the tension spring 12 in this embodiment may be changed to a torsion spring, and the back crest 1 may be replaced with a torsion spring.
0 can be any shape as long as it is similar to the shape of a square, and at least its upper end (tip) is bent forward.

As detailed above, the present invention is a hinged device for a forklift in which the backrest is tilted forward using the upward tilting action of the finger bar to press down the load on the fork from above. Therefore, according to the present invention, it is possible to prevent the load, such as wood, from being unbalanced from side to side or from wobbling due to sudden braking or sharp turns of the vehicle, and to hold the load in a stable state for transportation, thereby improving work safety. It is also effective in improving efficiency. In addition, the backrest is used as a holding member, and the backrest is tiltably attached to the front surface of the lift bracket with a pin, and the backrest is tilted via an engaging portion protruding from the upper end of the finger bar. This method can be implemented without particularly increasing the number of component parts of the entire device, and as a result, the lost load is reduced, which is extremely effective in increasing the allowable load.It is also advantageous in terms of cost. Gerbers are always in contact with each other in an overlapping manner through an engaging part that projects upward from the upper end of the finger bar, and there is no space between the two members in the vertical direction, so there is a problem of baggage getting caught. will not occur.

In addition, in the present invention, the contact surface between the engaging portion protruding from the finger bar and the lower end of the back crest is such that the back crest is tilted downward at a faster speed than the upward tilting speed of the finger bar immediately after the fork starts to tilt upward. By setting the downward tilting speed to slow down as the finger bar tilts upward, the backrest is quickly tilted forward after the fork begins to tilt upward, and the load is held down from above. This has the advantage of preventing falls due to collapse, and by slowing down the forward tilting motion of the back crest once the upward tilting motion of the forks has progressed to a certain extent, it is possible to prevent damage caused by forcibly holding down the load.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a side view of the hinged device, and FIGS. 2 and 3 being side views showing the operating mode. 1...Mast, 2...Lift bracket, 3...
... fork, 4... finger bar, 4a... engaging portion, 6... dump cylinder, 10... back crest, 12... tension spring.

Claims (1)

[Scope of utility model registration request] An engaging part is provided upwardly projecting on the upper end of a finger bar for fork support, which is attached to the lower front of a lift bracket that moves up and down along the mast so that it can be damped, and the upper end of the lift bracket is provided with an upper end that extends forward. The lower side of the bent backrest is attached with a pin so that it can be tilted forward, and the backrest is always held in an upright state by an elastic member, and the lower end of the backrest is attached to the engagement part of the finger bar. The back crest is always brought into contact with the back surface in an overlapping manner, and when the fork of the finger bar moves upward, the back crest is tilted upward through the engaging portion, and furthermore, the contact surface between the engaging portion and the lower end of the back crest is , a forklift configured such that the back crest tilts forward at a faster speed than the upward tilting speed of the finger bar immediately after the upward tilting movement of the fork starts, and the forward tilting speed slows down as the finger bar upwardly tilts. hinged device.