JPH07330297A - Attachment for forklift - Google Patents

Abstract

PURPOSE:To provide an attachment with which fixing and releasing of a holding device for holding a load of a fork or the like can be performed easily. CONSTITUTION:A rotary fork attachment for a forklift comprises an upper fork bar and a lower fork bar disposed to be rotatable right and left, and a fork 4 disposed to be movable along the upper fork bar and the lower fork bar 6. An engagement pin 12 is movably disposed on the fork 4, and an engagement groove 10 to be engaged with the engagement pin 12 by motion of the engagement pin 12 is provided in the lower fork bar 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a forklift.

[0002]

2. Description of the Related Art Conventionally, in a forklift truck, a box pallet is used to carry loose objects, powdered materials, or liquids, and rotate the forks at a desired location to discharge the forks. There is a rotatable attachment.

A conventional rotary fork attachment of a conventional forklift will be described below with reference to FIGS.
As shown in FIG. 6, in the forklift 30, an attachment 33 is arranged on a mast 32 which is erected on the front part of the machine base 31. The attachment 33 includes a lift bracket 34 that moves up and down along the mast 32, and a rotating body 35 that is rotatably provided on the front surface of the lift bracket 34.
And a pair of forks 36 as a holding device for holding a load. Fork 36 of rotating body 35
An upper fork bar 37 and a lower fork bar 38 are juxtaposed on the mounting surface. On the other hand, an upper hook 39 and a lower hook 40 are provided above and below the rear surface of the fork 36. The fork 36 is attached to the rotating body 35 with the upper hook 39 hooked on the upper fork bar 37 from above and the lower hook 40 hooked on the lower fork bar 38 from below. Further, as shown in FIG. 7, a plurality of lock holes 41 are provided in a row on the left and right sides on the front surface of the lower fork bar 38. On the other hand, fork 36
A lock plate 42 is provided on a side surface of the lock plate 42 at a position in contact with the lower fork bar 38.
The lock bolt 43 is tightened. As shown in FIG. 8, the tip of the lock bolt 43 has a lower fork bar 3
It is fitted in the lock hole 41 provided in the No. 8.

As described above, the upper hook 39 is hooked on the upper fork bar 37 from above, and the lower hook 40 is hooked on the lower fork bar 38 from below, whereby the fork 36 attached to the rotating body 35 is
The vertical direction and the front-back direction are fixed, and the lock bolt 43 is fitted into the lock hole 41, whereby the left-right direction is fixed. Therefore, even if the load is held by the fork 36 and the cargo handling work is performed or the fork 36 is rotated, the fork 36 does not rotate.
It will be fixed to.

Further, the lower fork bar 38 is provided with a plurality of lock holes 41 in a row on the left and right. Therefore, the lock bolt 43 is removed from the lock plate 42, and the fork 36 is moved along the upper fork bar 37 and the lower fork bar 38. Then, by tightening the lock bolts 43 on the lock plates 42 and fitting them in different lock holes 41, the interval between the forks 36 can be changed according to the size of the load and the like.

[0006]

However, the lock bolt 4 is used to fix a holding device for holding a load such as a fork.
Since 3 is used, the lock bolt 43
There is a risk that the lock bolt 43 may be lost when the lock bolt 43 is removed when the lock bolt 43 is loosened and dropped, or when the holding device is changed in interval or removed.

Further, the lock bolt 43 is removed, or
A tool such as a spanner is required for tightening, and
It took a long time to fix or release the holding device.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to easily change a space between holding devices for holding loads such as forks or to remove them easily. An object of the present invention is to provide an attachment capable of fixing and releasing the holding device for holding the load.

[0009]

In order to solve the above problems, the invention of claim 1 is such that a holding device for holding a load is movably arranged along a mounting seat, and the holding device is always provided. In an attachment of a forklift in which the device is fixed to a mounting seat, an engaging pin can be fitted to the holding device and a fitting seat can be fitted to the engaging pin at a position close to the holding device and the mounting seat. The gist of the invention is that the groove is formed and the fitting thereof can be engaged and disengaged.

According to a second aspect of the present invention, in the attachment according to the first aspect, the engagement pin is formed in a fan shape, and the engagement pin is rotatably arranged around the center of the fan shape, and the engagement groove is engaged. The gist is that it is formed in a fan shape that fits with the pin.

According to a third aspect of the present invention, in the attachment according to the second aspect, a worm wheel having engagement pins coaxially connected to each other, a worm for rotating the worm wheel, and an operating lever for rotating the worm are provided. It is the gist to have established.

[0012]

Therefore, according to the inventions of claims 1 and 2,
When the holding device for holding a load such as a fork is fixed or released, the engagement pin provided in the holding device and the engagement groove formed in the mounting seat are engaged and disengaged.

According to the third aspect of the present invention, the engagement pin is rotated by operating the actuating lever to fix and release the holding device.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the forklift attachment according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a rotary fork attachment 1 includes a lift bracket 2 that moves up and down along a mast (not shown), a rotary body 3 rotatably provided on the front surface of the lift bracket 2, and a rotary body. It is composed of a pair of forks 4 as a holding device attached to the front surface of the body 3 for holding a load. An upper fork bar 5 and a lower fork bar 6 as mounting seats for the forks 4 are fixed in parallel to the front surface of the rotating body 3. Meanwhile, fork 4
An upper hook 7 and a lower hook 8 are provided above and below the back surface. Then, the upper hook 7 is on the upper fork bar 5, and the lower hook 8 is on the lower fork bar 6.
The fork 4 is attached to the rotating body 3 by being hooked from below. As shown in FIG. 2, an engaging piece 9 is provided on the upper part of the lower fork bar 6, and a plurality of engaging grooves 10 are provided at equal intervals on the upper surface of the engaging piece 9. The engagement groove 10 is formed of a flat surface 10a and a curved surface 10b, and has a fan-shaped (quarter-circle) cross section as shown in FIG.

On the other hand, a lock box 11 is provided on the side surface of the fork 4 at a position in contact with the engagement piece 9, and an engagement pin 12 is rotatably arranged on the back surface of the lock box 11. The engagement pin 12 is formed of a flat surface 12a and a curved surface 12b around the rotation axis, and has a semicircular shape that fits into the engagement groove 10 of the engagement piece 9. Further, as shown in FIG. 3, an operating lever 13 for rotating the engagement pin 12 is provided on the side surface of the lock box 11. As shown in FIG. 4, inside the lock box 11, a worm wheel 14 to which the engaging pin 12 is coaxially connected and a worm 15 to be connected to the operating lever 13 are provided in a meshed state. ing. When the operating lever 13 is rotated, the worm 15 connected to the operating lever 13 is rotated, the worm wheel 14 is rotated, and the engagement pin 12 is rotated.

Next, the operation of the rotary fork attachment 1 configured as described above will be described. When performing a normal cargo handling work, as shown in FIG. 1, the upper fork bar 5 and the lower fork bar 6 are attached to the rotating body 3 by being vertically hung on the upper hook 7 and the lower hook 8, respectively. The fork 4 is fixed in the up-down direction and the front-back direction, and at the same time, as shown in FIG.
Is engaged with the engaging groove 10, the flat surface 10a of the engaging groove 10
The flat surface 12a of the engaging pin 12 or the curved surface 10b of the engaging groove 10 and the curved surface 12b of the engaging pin 12 are engaged with each other, and the fork 4 is fixed in the left-right direction. Therefore, even if the load is held by the fork 4 and the cargo handling work is performed, the fork 4 is still fixed to the rotating body 3.

When the spacing between the forks 4 is changed or the forks 4 are removed according to the size of the load, the actuating lever 13 is rotated and, as shown in FIG.
The engagement pin 12 is rotated from the A position to the B position, that is, to a position where the flat surface 12a of the engagement pin 12 is horizontal downward. Then, the engagement pin 12 is disengaged from the engagement groove 10, and the fork 4 can move in the left-right direction. Therefore, the fork 4 is moved or removed. When fixing the fork 4, the operating lever 13 is rotated at a position where the engaging pin 12 is above the arbitrary engaging groove 10 to rotate the engaging pin 12 from the B position to the A position. Then,
The engagement pin 12 fits in the engagement groove 10, and the fork 4 is fixed in the left-right direction.

Therefore, in the attachment of this embodiment, when fixing and releasing the fixing of the fork 4, only the operating lever 13 is operated, no tool is required, and the fixing and releasing of the fork 4 is released with a small force. It can be performed. Further, since the engaging pin 12 is integrated with the fork 4 and the parts are not removed, the parts are not lost and the operation does not take time. Therefore, the fork 4 can be easily fixed and released. Moreover, the worm wheel 14 and the worm 15
Since the worm wheel 14 cannot rotate the worm 15 by using the and, the engagement between the engagement groove 10 and the engagement pin 12 does not loosen when the fork 4 is fixed, and the worm wheel 14 does not deteriorate with time. The fork 4 can be fixed completely.

The present invention is not limited to the above embodiment, but may be configured as follows, for example, within the scope of the invention. (1) In the above embodiment, in order to fix the fork 4 in the left-right direction, the engaging piece 9 is provided on the upper part of the lower fork bar 6, and the lock box 11 is provided on the side surface of the fork 4 at a position in contact with the engaging piece 9. The engaging groove 10 and the engaging pin 12 are fitted together, but the engaging piece 9 is provided on the upper fork bar 5, and the lock box 11 is provided on the upper end side surface of the fork 4 to provide the engaging groove 10 You may make it engage with and the engagement pin 12. Then, when fixing and releasing the fixing of the fork 4, the operating position of the operating lever 13 becomes high, and the working posture becomes easy.

(2) In the above embodiment, the engaging groove 10 is formed in a fan shape, and the engaging pin 12 is formed in a semicircular shape. Even if it is formed in a fan shape similar to the groove 10 and is arranged so as to be fitted into the engagement groove 10, the same effect as that of the above-described embodiment is obtained.

(3) In the above embodiment, the operating lever 1 is connected to the worm 15 to rotate the engaging pin 12.
Although 3 is provided, a groove on which a coin can be hooked may be provided at the end of the worm 15. In this case, the fork 4 can be fixed and released by rotating the engagement pin 12 using a coin.

(4) In the above embodiment, the fork 4 is attached to the rotary fork attachment 1, but even if a device such as a clamp arm is attached, the same effect as that of the above embodiment can be obtained.

(5) In the above embodiment, the present invention is embodied in the rotating fork attachment 1, but it may be embodied in a normal non-rotating fork attachment.
That is, the upper fork bar 5 and the lower fork bar 6 as the mounting seats may be embodied as a fork attachment directly fixed to the front surface of the lift bracket 2.

[0025]

As described in detail above, according to the first and second aspects of the present invention, parts are removed when changing the interval of the holding device for holding a load such as a fork or when removing the holding device. Instead, a holding device such as a fork that holds a load can be fixed or unfixed.

According to the third aspect of the present invention, the holding device can be fixed and released by operating the actuating lever with a small force without using a tool. Therefore, the holding device can be easily fixed and released.

[Brief description of drawings]

FIG. 1 is a perspective view showing a rotary fork attachment in an embodiment embodying the present invention.

FIG. 2 is a perspective view showing a fork fixing portion in one embodiment.

FIG. 3 is a perspective view showing a lock box according to an embodiment.

FIG. 4 is a configuration diagram showing the inside of a lock box according to an embodiment.

FIG. 5 is an explanatory view showing the fitting of the engagement pin and the engagement groove in the embodiment.

FIG. 6 is an overall side view of a conventional forklift truck.

FIG. 7 is a perspective view showing a fork fixing portion in a conventional technique.

FIG. 8 is a side sectional view showing a fork fixing portion in the conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating fork attachment, 3 ... Rotating body, 4 ... Fork as a holding device, 5, 6 ... Upper fork bar and lower fork bar as a mounting seat, 10 ... Engagement groove, 1
2 ... Engaging pin, 13 ... Actuating lever, 14 ... Worm wheel, 15 ... Worm

Claims (3)

[Claims] 1. A forklift attachment in which a holding device for holding a load is movably arranged along a mounting seat, and the holding device is always fixed to the mounting seat. The engaging pins are formed on the holding device and the engaging groove that can be fitted to the engaging pins on the mounting seat, respectively, at positions close to each other, and the fitting can be engaged and disengaged. Attachment to be. 2. The attachment according to claim 1, wherein the engaging pin is formed in a fan shape, and is rotatably disposed around the center of the fan shape, and the engaging groove is engaged with the engaging pin. An attachment characterized by being formed in a fan shape. 3. The attachment according to claim 2, further comprising: a worm wheel having engagement pins coaxially connected to each other, a worm for rotating the worm wheel, and an operating lever for rotating the worm. A characteristic attachment.