JP2001302194A - Cushioning attachment of forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the cushioning attachment of a forklift durable over a long period. SOLUTION: The cushioning attachment 15 of the forklift is formed by assembling a cushioning material 16 into an L-shaped fork 10 on the loading side of an upright arm part 11. A movable member 17 having the cushioning material 16 fixed thereon is installed on the upright arm part 11 of the fork 10 movably relative to each other in vertical direction. When the horizontal arm part 12 of the fork 10 is moved vertically in the fork pocket 14 of a load 13 in an abutting state of the load on the cushioning material 16, the upright arm part 11 allows the movable member 17 to move relative to each other in vertical direction, and leaves the movable member 17 in the abutting state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffer attachment for a forklift, and more particularly to a buffer attachment attached to an upright arm of each L-shaped fork.

[0002]

2. Description of the Related Art Generally, cargo such as containers is loaded on a truck or the like by a forklift or unloaded from a truck or the like. In this case, a buffer attachment is attached to the lower part of the upright arm of each L-shaped fork of the forklift in order to prevent damage to the cargo of the container or the like and collapse of the tare. Conventionally, as this kind of buffer attachment, for example, FIG.
There is one shown in (C).

[0003] The cushioning attachment (15) has an L
At the lower part of the upright arm (11) of the character-shaped fork (10), the cushioning material (16) is fixed to the cargo side by bolts (28) via front and rear contact plates (27) and (27). You. Here, FIGS. 5 (A) to 5 (C) are main part extraction views showing the positional relationship between the load (13) and the L-shaped fork (10) during loading and unloading. That is, in FIG. 5A, the horizontal arm portion (12) of the fork (10) is inserted into the fork pocket (14) of the load (13), and the cushioning material ( FIG. 5 (B) shows a state in which the horizontal arm (12) is slightly raised and the cargo (13) is lifted off the ground (E). (C) shows a state where the horizontal arm (12) is lowered at the time of unloading and the cargo (13) is brought into contact with the ground (E).

[0004]

The above-mentioned buffer attachment (15) is fixed to the upright arm (11) of the L-shaped fork (10). The state shown in FIG. 5A is shifted from the state shown in FIG. 5A to the state shown in FIG. 5B, and the state shown in FIG. At this time, since a strong contact friction force due to rubbing acts between the rear surface of the load (13) and the cushioning material (16), the cushioning material (16) is repetitively loaded and unloaded. Worn early.

The present invention has been made in view of the above circumstances, and an object of the present invention is to eliminate abrasion of a cushioning material against repeated loading and unloading, and to provide a forklift that can be used for a long period of time. To provide a buffer attachment.

[0006]

In order to solve the above-mentioned problems, the present invention is configured as follows. That is, claim 1
As shown in FIGS. 1 to 4, for example, as shown in FIGS. 1 to 4, a cushioning material (16) is attached to the loading side of an upright arm (11) of an L-shaped fork (10), and a cushioning attachment ( 15) is constituted. Further, a movable member (17) on which the cushioning material (16) is fixed is mounted so as to be vertically movable relative to the upright arm (11) of the fork (10). Then, with the load (13) in contact with the cushioning material (16), the horizontal arm (12) of the fork (10) is moved up and down in the fork pocket (14) of the load (13). When the upright arm (11) moves vertically relative to the movable member (17), the movable member (17) is left in the contact state. The configuration is as follows.

According to a second aspect of the present invention, in the forklift cushion attachment according to the first aspect,
For example, as shown in FIGS. 1, 3 and 4, an elastic member (1) is provided between the movable member (17) and the fork (10).
8), the relative deformation between the movable member (17) and the upright arm (11) is absorbed by the elastic deformation thereof, and the elastic member (18) after the release of the contact.
The movable member (17) is configured to return to the restored height position (H) by the restoring force.

When the contact between the cushioning material (16) and the cargo (13) is released, the movable member (17) is moved by the restoring force of the elastic member (18).
It returns to the height position (H) in the contact release state, and the “restored height position (H)” means the height position of the movable member (17) in the contact release state. . Further, when the horizontal arm portion (12) of the fork (10) moves up and down in the fork pocket (14), the elastic deformation of the elastic member (18) is determined at the "restored height position (H)". It is also at a height position (H) sufficient to absorb the relative movement between the movable member (17) and the upright arm (11).

According to a third aspect of the present invention, in the forklift cushion attachment according to the second aspect,
An elastic member (16b) is integrally extended downward from the lower end of the cushioning member (16), and the elastic member (18) is constituted by the elastic member (16b).

According to a fourth aspect of the present invention, in the buffer attachment for a forklift according to any one of the first to third aspects, the movable member (17) is substantially U-shaped in plan view. The movable block (17A) is constituted by a movable block (17A).
0) is mounted on the upright arm portion (11) from the front side, and the rolling roller (21) is provided between the both side portions (17b) and (17b) of the movable block (17A) on the back side of the upright arm portion (11). ) Is assembled.

[0011]

According to the present invention, the following functions and effects are obtained. (A) According to the first aspect of the present invention, the movable member (17) to which the cushioning material (16) is fixed is attached to the upright arm (11) of the fork (10) so as to be relatively movable in the vertical direction. When loading and unloading are repeated, the horizontal arm (12) of the fork (10) is loaded (1).
When the movable member (17) is moved up and down in the fork pocket (14) of (3), the movable member (17) is left in contact with the load (13) via the cushioning material (16). As a result, rubbing between the cushioning material and the cargo is eliminated, the abrasion of the cushioning material is eliminated, and the attachment can be used for a long time.

(B) According to the second aspect of the present invention, in the buffer attachment for a forklift according to the first aspect, an elastic member (18) is provided between the movable member (17) and the fork (10). It is interposed and absorbs the relative movement between the movable member (17) and the upright arm (11) by its elastic deformation, and the above-mentioned restoring force of the elastic member (18) after the contact is released. Movable member (1
7) is returned to its restored height position (H), so that there is no rubbing between the cushioning material and the load during subsequent loading and unloading.

That is, the elastic member (18) interposed between the movable member (17) and the fork (10) serves to load and unload the movable member (17) and the upright arm (11). ) And elastically deform. In a state where the contact between the cushioning material (16) and the load (13) is released, the movable member is restored by the restoring force of the elastic member (18) in preparation for the next loading or unloading. The member (17) returns to its restored height position (H). That is, in the contact release state, when the horizontal arm (12) of the fork (10) moves up and down in the fork pocket (14), the movable member (17) and the upright arm (1) are moved.
Height position (H) sufficient to absorb relative movement with 1)
Becomes Thereby, at the time of subsequent loading and unloading, rubbing between the cushioning material and the load is eliminated, wear of the cushioning material is eliminated, and the attachment can be used for a long time.

(C) According to the third aspect of the invention, in the buffer attachment for a forklift according to the second aspect, the elastic portion (1) is provided at the lower end of the buffer material (16).
6b) is integrally extended downward, and the elastic portion (16)
Since the elastic member (18) is constituted by b),
By integrally extending the elastic portion, which is the elastic member, at the lower end of the cushioning material, the configuration is significantly simplified as compared with the case where the elastic members are individually provided.

(D) In the invention according to claim 4, in the buffer attachment for a forklift according to any one of claims 1 to 3, the movable member (17) is substantially U in plan view. -Shaped movable block (17A)
The movable block (17A) is mounted on the upright arm (11) from the front, and the upright arm (1) is attached to the movable block (17A).
Since the rolling roller (20) is assembled between the both sides (17b) and (17b) of the movable block (17A) on the back side of 1), when the attachment is mounted on the upright arm of the fork, It can be easily installed without requiring many bolts.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A buffer attachment for a forklift according to the present invention will be described below with reference to the accompanying drawings. 1 shows a buffer attachment according to an embodiment of the present invention, FIG. 1 (A) is a longitudinal sectional view of the buffer attachment, FIG. 1 (B) is an exploded perspective view of the buffer attachment, and FIG. It is a side view of a large forklift provided with a buffer attachment.

As shown in FIG. 2, the forklift (1) is of a counterbalance type so as to be compatible with container handling. A balance weight (3) is provided at the rear of the vehicle body (2) in the first half. A driver's cab (4) is provided in the section, and a mast (5) is provided in the forefront. Here, reference numeral (6) indicates a lift cylinder, and (7) indicates a tilt cylinder. The mast (5) is provided with a fork support frame (8) which can be moved up and down.
A pair of left and right L-shaped forks (10) (10) are supported so as to be able to approach and separate from each other.

As shown in FIG. 2, the buffer attachment (15) of the forklift according to the present invention has an upright arm (11) of each of the pair of L-shaped forks (10) (10).
It is detachably attached to the lower part of the vehicle, and is configured by assembling a cushioning material (16) on the side of the load (13). This cushioning material (1
As shown in FIGS. 1A and 1B, 6) is fixed to a movable member (17) that can move up and down along the upright arm (11) of each of the forks (10). When unloading,
With the load (13) in contact with the cushioning material (16), the horizontal arm (12) of the fork (10) was moved up and down in the fork pocket (14) of the load (13). Sometimes, the upright arm (11) is allowed to move in the vertical direction relative to the movable member (17), and the movable member (17) is left in the contact state. Is configured. This is because the cushioning material (1)
The purpose of the present invention is to eliminate rubbing between 6) and the cargo (13), thereby eliminating wear of the cushioning material (16), and allowing the attachment to be used for a long period of time.

The movable member (17) is constituted by a movable block (17A) having a substantially U-shape in plan view, and the cushioning material (1) is provided on the front surface (17a) of the movable block (17A).
6) is assembled via the collar (25) by the fixing bolt (24). Then, as shown in FIG. 1A, the head of the fixing bolt (24) is immersed in a stepped hole (26) formed in the cushioning material (16), and the cushioning material (1) is inserted.
It is configured such that the buffer function of 6) is not reduced.

The movable block (17A) is mounted on the upright arm (11) of each fork (10) from the front,
The movable block (1) is provided on the back side of the upright arm (11).
7A) a support shaft (20) between both side portions (17b) and (17b).
Roller roller (21) is assembled through the support shaft (2).
A retaining pin (23) is attached to one end of the (0) via a washer (22). Accordingly, when the movable block (17A) is mounted on the fork (10), the movable block (17A) can be easily mounted without requiring many bolts. Further, the movable block (17A) is vertically movable relative to the upright arm (11) of the fork (10).

At the lower end of the cushioning material (16), a part thereof (elastic body part 16b) is integrally extended downward. This elastic body portion (16b) is provided with an elastic member (18) described later.
When loading or unloading, the horizontal arm (12) of the fork (10) is loaded with the load (13) in contact with the cushioning material (16) during loading or unloading. When the upright arm (11) is moved up and down in the fork pocket (14) of (13), the upright arm (11) is allowed to move relative to the movable member (17) in the up and down direction. After the contact is released, the movable member (17) acts to return to the restored position (H) by the restoring force.

Hereinafter, the buffer attachment (15)
The operation at the time of loading and unloading will be described with reference to FIG. Here, FIGS. 3A to 3C are all main part extraction views showing an operation state of the attachment (15).

At the time of loading, as shown in FIG.
The horizontal arm (12) of the fork (10) is inserted into the fork pocket (14) of the load (13), and the cushioning material (16) is brought into contact with the rear surface of the load (13).
Next, as shown in FIG.
Is lifted in the fork pocket (14) to lift the load (13) off the ground (E).
At this time, the vertical arm (11) of the fork (10) also rises, but the movable member (17) is provided with a cushioning material (16).
The elastic member (16b) is left behind while maintaining the contact state between the movable member (17) and the upright arm (11) due to its elastic deformation. Absorbs the relative movement of and contracts.

At the time of unloading, the horizontal arm (12) of the fork (10) is lowered to bring the load (13) into contact with the ground (E). At this time, the vertical arm (11) of the fork (10) also descends, but the movable member (1)
7) is left while maintaining the contact state between the cushioning material (16) and the cargo (13), and the elastic body portion (16b) that has been elastically deformed is restored (FIG. 3C). reference〕.
Next, when the contact between the cushioning material (16) and the cargo (13) is released, the movable member (17) descends by its own weight, and the elastic body portion (16b) moves to the horizontal arm portion (1).
2) After sitting on the upper side, the movable member (17) returns to its restored height position (H) (see FIG. 3A).

That is, in the contact release state, the relative movement between the movable member (17) and the upright arm (11) is absorbed by restoring the elastically deformed elastic portion (16b). Height position (H) sufficient to perform the operation. Thereby, at the time of subsequent loading and unloading, rubbing between the cushioning material and the load is eliminated, and the problem of abrasion of the cushioning material (16) is solved. Therefore, this attachment can be used for a long time.

In this embodiment, the elastic portion (16b) is integrally extended downward from the lower end of the cushioning material (16). Instead, a separate elastic body portion (16b) is attached to the cushioning material (16). The lower end of (16) or the lower end of the movable member (17) may be provided so as to be detachable and replaceable. In the former case, the elastic portion (16b) is integrated with the cushioning material (16).
Is drastically extended, thereby greatly simplifying the configuration. Conversely, in the latter case, only the elastic portion (16b) needs to be replaced as a consumable part while the cushioning material (16) is left, so that the replacement is easy and the cost of parts is low. is there.

FIG. 4 is a diagram corresponding to FIG. 3 of a buffer attachment according to a modification of the present invention. In this embodiment, FIG.
As shown in (A), a tension spring (18), which is an elastic member, is interposed between the movable member (17) and the upright arm (11) of the fork (10) so that loading and loading can be performed. At the time of unloading, the load (13) is brought into contact with the cushioning material (16), and the horizontal arm (12) is unloaded.
Is moved up and down in the fork pocket (14), the upright arm (11) is moved by the movable member (1).
7), the movable member (17) is allowed to move relative to the up and down direction, and in the contact release state, the movable member (17) is moved to its restored position (H) by the restoring force of the tension spring (18).
It is configured to return to.

That is, when loading the fork (1)
When the horizontal arm (12) of the fork (10) is lifted from the ground (E) by raising the horizontal arm (12) of the fork (14) from the ground (E), the vertical arm (11) of the fork (10) rises. The movable member (17) is left behind while maintaining the contact state between the cushioning material (16) and the cargo (13), and the tension spring (18) is moved by the movable member (1).
7) and elongate by absorbing the relative movement between the upright arm portion (11) (see FIG. 4B).

At the time of unloading, the horizontal arm (12) of the fork (10) is lowered to bring the load (13) into contact with the ground (E). At this time, the fork (10)
The vertical arm (11) of the movable member (11) descends,
7) is left while maintaining the contact state between the cushioning material (16) and the cargo (13), and the tension spring (1) is left.
8) contracts (see FIG. 4C). Next, cushioning material (1
When the contact between 6) and the load (13) is released, the movable member (17) descends by its own weight and returns to its restored height position (H) (see FIG. 4A). Instead of the tension spring (18), the compression spring is replaced with the movable member (17) and the upright arm (1) of the fork (10).
1).

That is, when the loading and unloading is completed, the contact between the cushioning material (16) and the load (13) is released, and the elastic member (18) continues to load and unload. In order to prepare for lowering, the movable member (17) is returned to the restored height position (H). Therefore, also in this embodiment, during subsequent loading and unloading, rubbing does not occur between the cushioning material (16) and the load (13).

The present invention is not limited to the above embodiment, and various design changes can be made, for example, as described below. (A) In the above embodiment, the buffer attachment (1
5) has been described as an example in which a pair of left and right L-shaped forks (10) is attached to the lower part of the upright arm (11).
The fork (10) is not limited to a pair of left and right,
The buffer attachment (15) may be attached to an appropriate position of the upright arm (11) so as to be relatively movable.

(B) In the above embodiment, the movable member (1
7) and an elastic member (16b · 1) between the fork (10).
8), the elastic member (16b / 18) need not necessarily be interposed. For example, the movable member (17) is connected to a fork (1
When the movable member (17) is mounted so as to be relatively movable with respect to the vertical arm portion (11), a sliding resistance is applied so that the movable member (17) does not descend by its own weight, and the load ( When the horizontal arm (12) of the fork (10) is moved up and down in the fork pocket (14) in a state where the fork (13) is in contact with the fork (10), the upright arm (11) moves the movable member (17). Is allowed to move relative to
The movable member (17) may be configured to be left in the above-mentioned contact state.

(C) In the above embodiment, the movable member (1
7) is illustrated by a U-shaped movable block (17A) in plan view, but the movable member (1
7) may be any one that can be mounted so as to be relatively movable with respect to the upright arm portion (11) of the fork (10), and the specific form can be implemented with appropriate changes.

[Brief description of the drawings]

FIG. 1 shows a buffer attachment according to an embodiment of the present invention. FIG. 1A is a longitudinal sectional view of the buffer attachment, and FIG. 1B is an exploded perspective view of the buffer attachment.

FIG. 2 is a side view of a forklift provided with the buffer attachment.

FIGS. 3 (A) to 3 (C) are each a main part extraction view showing an operation state of the buffer attachment according to the embodiment of the present invention.

FIG. 4 is a diagram corresponding to FIG. 3 of a buffer attachment according to a modification of the present invention.

FIG. 5 is a diagram corresponding to FIG. 3 of a buffer attachment according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Forklift, 10 ... Fork, 11 ... Upright arm part of fork, 13 ... Cargo, 15 ... Buffer attachment, 16 ... Buffer material, 16b ... Elastic body part, 17 ... Movable member, 17A ... Movable block, 17b ... Movable Both side portions of the block, 18: elastic member, 21: rolling roller, H: restoring height position of movable member.

Claims (4)

[Claims] An upright arm (1) of an L-shaped fork (10).
In the cushioning attachment of a forklift constructed by assembling the cushioning material (16) on the loading side of 1), the movable member (17) having the cushioning material (16) fixed thereto is attached to the upright arm of the fork (10). The horizontal arm (12) of the fork (10) is attached to the cushion (16) while the load (13) is in contact with the cushion (16). When the load (13) is moved up and down in the fork pocket (14), the upright arm (11) is allowed to move relative to the movable member (17) in the up-down direction. A buffer attachment for a forklift, wherein the movable member (17) is configured to be left in the contact state. 2. The buffer attachment for a forklift according to claim 1, wherein an elastic member (18) is interposed between the movable member (17) and the fork (10), and the elastic member is deformed by the elastic member. In addition to absorbing the relative movement between the movable member (17) and the upright arm (11), the movable member (17) is restored to its rest height by the restoring force of the elastic member (18) after the contact is released. A buffer attachment for a forklift, wherein the attachment is configured to return to a position (H). 3. The buffer attachment for a forklift according to claim 2, wherein an elastic portion (16b) is integrally extended downward from a lower end of said cushioning material (16), and said elastic portion (16b) is used to extend said elastic portion (16b). An attachment for buffering a forklift, comprising an elastic member (18). 4. The forklift cushion attachment according to claim 1, wherein the movable member (17) is constituted by a substantially U-shaped movable block (17A) in plan view. Then, this movable block (17
A) is mounted on each of the upright arms (11) of the fork (10) from the front side, and on both sides of the movable block (17A) on the back side of the upright arms (11) (17b) (17b).
A buffer attachment for a forklift, comprising a rolling roller (21) interposed therebetween.