JPH0912293A - Bail clamp attachment - Google Patents

Abstract

PURPOSE: To provide a bail clamp attachment capable of clamping a load to be handled with clamp force suitable for the load, and capable of widening the weight range of the load capable of being handled. CONSTITUTION: A bail clamp attachment is composed of a clamp holder 93 and a pair of clamp arms 2 supported by the clamp holder 93 and to be opened and closed in the lateral direction. In a pair of clamp arms 2, attaching parts 5 on which flexure preventing plates 4 are to be mounted are provided on respective outer surfaces along the longitudinal directions of the clamp arms 2, and the flexure preventing plates 4 are mounted on the attaching parts 5 so as to be attached and detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bail clamp attachment mounted on a forklift for clamping and handling loads from the side.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a bail clamp attachment 90 mounted on a forklift has been known as a device for clamping and handling loads from the side. The above bale clamp attachment 90
As shown in FIG. 6, it comprises a clamp holder 93 and a clamp arm 92 supported by the clamp holder 93 and opened and closed in the left-right direction.

As shown in FIG. 6, the clamp holder 93 has four guide grooves 934 into which the slide bar 924 of the clamp arm 92 is inserted and which is slidably guided. On the other hand, the left and right clamp arms 92 have two upper and lower parts which are respectively inserted into the guide grooves 934 at their rear portions.
It has a slide bar 924 of a book.

The slide bar 924 of each clamp arm 92 is inserted into the guide groove 934, and the engaging portion 927 of the clamp arm 92 and the engaging portion 937 of the clamp holder 93 are inserted through a hydraulic cylinder (not shown). The bail clamp attachment 90 is configured by connecting the bail clamp attachment 90. By operating the hydraulic cylinder, the clamp arm 92 can be opened and closed.

[0005]

However, the conventional bail clamp attachment described above has the following problems. That is, the conventional bail clamp attachment 9 described above.
When handling a load using 0, it may not be possible to clamp with a clamping force suitable for the load to be handled.

Specifically, as shown in FIG. 7, when the load 8 is clamped by the clamp arm 92, the clamp surface 920 of the clamp arm 92 is brought into contact with the load 8 in as wide a range as possible so that a high frictional force is exerted. Need to get. On the other hand, when the load 8 is clamped, the clamp arm 92 is bent outward by the clamping force.

Therefore, the left and right clamp arms 92 are
It is necessary to have appropriate rigidity and to make the interval between the tip portions 925 slightly narrower than the root portion in advance. This gives
At the time of clamping, each clamp arm 92 bends outward and becomes substantially parallel, so that the contact area with the luggage 8 can be increased.

However, as shown in FIG. 7, when a relatively heavy load 8 is clamped, a larger clamping force is required. At this time, if an attempt is made to obtain the necessary clamping force, the clamp arm 92 will bend too much and the tip 925 will open outward. Therefore, the tip portion 925 of the clamp arm 92 is separated from the luggage 8 and the contact area is rather reduced. Therefore, even if the clamping force is increased, the necessary frictional force cannot be obtained, and the load cannot be clamped with the optimum clamping force. Therefore, in the conventional bail clamp attachment 90, the weight range of the load that can be handled is limited to a narrow range.

The present invention has been made in view of the above conventional problems, and can be clamped with a clamping force suitable for a load to be handled, and the weight range of the load that can be handled can be widened. It is an attempt to provide an attachment.

[0010]

The present invention comprises a clamp holder and a pair of clamp arms that are supported by the clamp holder and open and close in the left-right direction. The pair of clamp arms are respectively provided on the outer side surface of the clamp arm. A bail clamp attachment characterized in that it has a mounting portion for mounting a bending prevention plate along the longitudinal direction, and the bending prevention plate is removably mounted on the mounting portion.

What is most noticeable in the present invention is that the pair of clamp arms each have the mounting portion for mounting the anti-bending plate, and the anti-bending plate is detachably mounted on the mounting part. Is to become.

As the bending prevention plate, for example, a material such as steel having a certain degree of rigidity can be used. Further, the clamp holder and the clamp arm are connected through an actuator such as a hydraulic cylinder as shown in the conventional example, and the pair of clamp arms can be opened and closed by operating the actuator. There is.

Further, it is preferable that a plurality of the mounting portions are provided on each clamp arm. This allows the rigidity of the clamp arm to be adjusted in multiple stages. Further, it is preferable that the mounting portion is a groove and the deflection preventing plate is inserted into the groove. Accordingly, the bending prevention plate can be easily attached and detached according to the type of luggage to be handled, and an appropriate clamping force can be obtained. still,
It is also possible to adopt a method of fixing the anti-deflection plate with a fixture such as a bolt.

Further, it is preferable that the groove is T-shaped, and that the anti-deflection plate has a T-shaped cross section including an insertion table to be inserted into the groove and a protrusion protruding from the insertion table. As a result, not only is the attachment / detachment easy, but it is possible to prevent the deflection preventing plate from falling off. Further, in the T-shaped bending prevention plate, the rigidity of the bending prevention plate can be easily changed by changing the height of the protruding portion.

Further, the groove may be L-shaped, and the deflection preventing plate may be L-shaped in cross section, which is composed of an insertion table to be inserted into the groove and a protrusion protruding from the insertion table. As a result, it is possible to easily process the groove and the deflection preventing plate. Also, the same effect as in the case of the T-shape can be obtained.

[0016]

In the bail clamp attachment of the present invention, the pair of clamp arms are provided with the mounting portion for mounting the anti-bending plate, and the anti-bending plate is removably mounted on the mounting part. I am doing it. Therefore, the rigidity of the clamp arm, that is, the amount of bending with respect to a constant clamping force, can be easily adjusted by attaching and detaching the bending preventing plate.

That is, when the anti-bending plate is not attached to the clamp arm, the original rigidity of the clamp arm can be maintained. The overall rigidity can be increased. Further, when a plurality of bending prevention plates are attached, the rigidity can be further increased by the number of attached attachments.

Therefore, when a relatively light load is clamped, the clamp arm is clamped without mounting the anti-bending plate. As a result, the clamp arm flexes moderately even when clamped with a relatively weak optimum clamping force, and a sufficient contact area with luggage can be obtained. On the other hand, when a relatively heavy load is to be clamped, a bending prevention plate is attached to the clamp arm for clamping. As a result, the clamp arm does not bend too much even if it is clamped with a relatively strong optimum force, and a sufficient contact area with the load can be obtained.

Therefore, the load can be clamped with the optimum clamping force for the weight of the load to be handled. Therefore,
According to the present invention, it is possible to provide a bail clamp attachment that can be clamped with a clamping force suitable for a load to be handled and can broaden the weight range of the load that can be handled.

[0020]

【Example】

Example 1 A bail clamp attachment according to an example of the present invention will be described with reference to FIGS. As shown in FIG. 1, the bail clamp attachment 10 of this example includes a clamp holder 93 (see FIG. 6) and a pair of clamp arms 2 supported by the clamp holder 93 and opened and closed in the left-right direction.

The pair of clamp arms 2 are provided with three mounting portions 5 on their outer side surfaces along the longitudinal direction of the clamp arms 2 for mounting the deflection preventing plates 4. Further, three bending prevention plates 4 are detachably attached to the mounting portion 5.

The mounting portion 5 is a T-shaped groove as shown in FIG. Further, as shown in FIG. 3, the anti-bending plate 4 has a T-shaped cross section composed of an insertion base 41 to be inserted into the groove and a protruding portion 42 protruding therefrom, and a tip end portion 43 of the protruding portion 42. Is tapered to prevent it from getting caught.

The pair of clamp arms 2 is made of a steel material having rigidity. Then, the interval between the tip portions is incorporated in the clamp holder 93 so as to be slightly narrower than the interval between the root portions. The deflection preventing plate 4 is made of a steel material having rigidity.

The clamp arm 2 is slidably supported by the clamp holder 93 by inserting the slide bar 24 into the guide groove of the clamp holder, as in the conventional example, and at the same time, a hydraulic cylinder (not shown). It is connected to the clamp holder 93 via. The clamp arm 2 is opened and closed by operating the hydraulic cylinder.

Next, the function and effect of this example will be described. In the bail clamp attachment 10 of this example, the mounting portions 5 are provided on the pair of clamp arms 2. The bending prevention plate 4 is detachably attached to the mounting portion 5. Therefore, the rigidity of the clamp arm 2 can be easily adjusted by attaching and detaching the bending prevention plate 4.

That is, when the anti-bending plate 4 is not attached to the clamp arm 2, the original rigidity of the clamping arm 2 can be maintained, while when one anti-bending plate 4 is attached, The rigidity enables the rigidity of the entire clamp arm 2 to be increased. 1 more or 2 more
When the sheet bending prevention plate 4 is attached, the rigidity can be further increased by the number of attached sheets.

Therefore, when a relatively light load is clamped, the clamp arm 2 is clamped without mounting the deflection preventing plate 4. As a result, the clamp arm 2 flexes moderately even when clamped with a relatively weak optimum clamping force,
A sufficient contact area with luggage can be obtained.

On the other hand, when a slightly heavy load is to be clamped, one bending prevention plate 4 is attached to the clamp arm 2 and clamped. As a result, even if the clamp arm 2 is clamped with the optimum force, the clamp arm 2 does not bend excessively, and a sufficient contact area with the luggage can be obtained. Furthermore, when heavier loads are clamped, the bending amount of the clamp arm 2 can be adjusted to an optimum amount by mounting one or two bending prevention plates 4.

Therefore, the load can be clamped with the optimum clamping force for the weight of the load to be handled. Therefore,
According to this example, it is possible to obtain a bale clamp attachment that can be clamped with a clamping force suitable for a load to be handled and can widen the weight range of the load that can be handled.

Embodiment 2 In this embodiment, as shown in FIGS. 4 and 5, instead of the clamp arm 2 and the T-shaped bending prevention plate 4 in Embodiment 1, a clamp having an attachment portion 52 formed of an L-shaped groove is used. The arm 6 and the L-shaped bending prevention plate 7 are used. As shown in FIG. 5, the flexure prevention plate 7 has a cross section L including an insertion base 71 to be inserted into the groove and a protrusion 72 protruding from the insertion base 71.
It has a letter shape, and the tip portion 73 of the protruding portion 72 is tapered to prevent catching. Others are the same as the first embodiment.

In this example, the cross-sectional shapes of the mounting portion 52 and the deflection preventing plate 7 are L-shaped. Therefore, these can be easily manufactured. In addition, the same effects as in the first embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a bail clamp attachment according to a first embodiment.

FIG. 2 is a cross-sectional perspective view taken along the line AA of FIG.

FIG. 3 is a perspective view of a bending prevention plate according to the first embodiment.

FIG. 4 is a sectional perspective view of a clamp arm according to the second embodiment.

FIG. 5 is a perspective view of a bending prevention plate according to the second embodiment.

FIG. 6 is an exploded perspective view of a conventional bail clamp attachment.

FIG. 7 is an explanatory view showing a problem of the conventional bail clamp attachment.

[Explanation of symbols]

 10. . . Bale clamp attachment, 2,6. . . Clamp arm, 4, 7. . . Bending prevention plate, 5, 52. . . Attachment part, 93. . . Clamp holder,

Claims (4)

[Claims] 1. A clamp holder and a pair of clamp arms that are supported by the clamp holder and open and close in the left-right direction. The pair of clamp arms are respectively provided on their outer side surfaces along the longitudinal direction of the clamp arm. A bail clamp attachment characterized in that it has a mounting portion for mounting the anti-bending plate, and the anti-bending plate is removably mounted on the mounting part. 2. The bail clamp attachment according to claim 1, wherein the mounting portion is a groove, and the deflection preventing plate is inserted into the groove. 3. The groove according to claim 2, wherein the groove is T-shaped, and the anti-bending plate has a T-shaped cross section including an insertion base inserted into the groove and a protrusion protruding from the insertion base. Bale clamp attachment. 4. The groove according to claim 2, wherein the groove is L-shaped, and the anti-bending plate has an L-shaped cross section including an insertion table to be inserted into the groove and a protrusion protruding from the insertion table. Bale clamp attachment.