JPH09110394A - Roll clamper of fork lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll clamper of a fork lift equipped with a clamp pad whose rubber pad is hard to peel from a pad body. SOLUTION: In a roll clamper of a fork lift equipped with a clamp pad 8 consisting of a pad body 11 and a sheetlike rubber pad 12 to be stuck to this pad body 11, a section almost dovetail groove type pad bank 13 is formed at the rear end side of an adhesive surface of the pad body. When the rubber pad 12 is made to adhere to the pad body 1 by means of baking, fused rubber is made to flow into the pad bank 13, whereby two engaging parts 15 being engaged with each other to check the extent of peeling power P being added to the rubber pad 12 are set up there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll clamp device mounted on a forklift and used for loading and unloading roll-shaped articles such as newspaper and kraft paper, and more particularly to a clamp pad mounted on a clamp arm. Rubber pad peeling prevention technology.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional general forklift roll clamp device for handling a roll-shaped article W is mounted on the front surface of a lift bracket 2 that moves up and down along a mast 1 of the forklift truck, and at the front side. Equipped with a clamp base 3 whose vertical surface is the arm mounting surface,
A pair of long and short clamp arms 4 and 5 are mounted on the clamp base 3. While the short-sized (lower side in the drawing) clamp arm 4 generally called a short arm is a fixed type (there is also a movable type for length adjustment),
A long (upper side in the figure) clamp arm 5, which is called a swing arm, is rotatably attached to the clamp base 3 by a pin 6 and is rotated by a clamp cylinder 7.

A clamp pad 8 having an inwardly curved surface that gently curves in the front-rear direction is rotatably mounted on a tip of each of the clamp arms 4 and 5 by a pin 9 and rotated by a clamp stopper 10. The range is regulated. As shown in FIG. 7, the clamp pad 8 is composed of an iron plate pad body 11 and a rubber pad 12 bonded to the pad body 11, and the rubber pad 12 is baked or bonded to the pad body 11. It is adhered by the agent.

[0004]

As shown in FIG. 6, the clamp pad 8 of the roll clamp device is always held in an outwardly opened posture by a spring (not shown). Therefore, when trying to grip the roll-shaped article W, the rear end of the rubber pad 12 comes into contact with the outer periphery of the roll-shaped article W earliest, and then the rear end thereof is pressed to rotate inward to move the roll-shaped article W. Hold it. Therefore, when gripping the roll-shaped article W, an external force P in the horizontal direction (hereinafter referred to as peeling force) for peeling the rubber pad 12 from the pad body 11 is provided at the end of the rubber pad 12, as shown in FIG. As a result, the rear edge of the rubber pad 12 may be peeled off from the pad body 11, and the peeling phenomenon does not stop at the rear edge and gradually expands.

Particularly, in the case of a baked rubber pad, the thickness of the rubber pad can be made thinner than that of a rubber pad adhered by an adhesive, so that it is superior in ease of use during cargo handling work, but on the edge of the rubber pad 11. When peeling occurs, there is a difficulty in that the peeling phenomenon easily spreads over the entire surface. It is considered that this is because the thickness of the rubber pad is thin and the absorption performance of the peeling force due to elastic deformation is low.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a roll clamp device for a forklift including a clamp pad in which a rubber pad is hard to be separated from a pad body. .

[0007]

In order to solve the above problems, the present invention takes the following means. That is, claim 1
The invention of claim 1, in a roll clamp device provided with a pad body and a sheet-like rubber pad adhered to the pad body, in a rubber pad near the edge of the adhesive surface between the pad body and the rubber pad, It is characterized in that an engaging portion which engages with each other is set to suppress the applied peeling force.

According to the invention of claim 1 configured as described above, when a peeling force for peeling from the pad body is applied to the end portion of the rubber pad, the peeling force is applied to the pad body and the rubber pad. It is restrained by the engaging portion set between. Therefore, the rubber pad is less likely to come off.
Further, when the end of the adhesive surface is peeled off, the engaging portion suppresses the peeling phenomenon from spreading to the central side adhesive surface.

According to a second aspect of the present invention, in a roll clamp device including a clamp pad including a pad body and a sheet-shaped rubber pad adhered to the pad body, a gripping surface edge portion is provided at an edge portion of the rubber pad. It is characterized in that a step portion is set away from the edge of the bonding surface.

According to the invention of claim 2 configured as described above, in the case of gripping a roll-shaped article, when the clamp pad is held in the outward open posture, the clamp pad is located behind the grip surface of the rubber pad. The edge part comes into direct contact with the roll-shaped article, but in this case, since the edge of the gripping surface of the rubber pad is kept away from the edge of the adhesive surface due to the presence of the step, the adhesive is caused by elastic deformation between both edge parts. The peeling force applied to the surface edge is weakened. This makes it difficult for the rubber pad to peel off.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. First, a first embodiment will be described with reference to FIGS. Since the entire structure of the roll clamp device mounted on the forklift and the mounting structure of the clamp pad mounted on the clamp arm are not different from conventional ones, the description thereof will be omitted and the main part of the present invention will be described. A rubber pad peeling prevention technique for a certain clamp pad will be described.

The present embodiment is intended for the case where the rubber pad 12 is adhered to the pad body 11 by baking, and as shown in FIGS. 1 and 2, the pin 9 is attached to the tip of the clamp arms 4 and 5. The clamp pad 8, which is rotatably attached via the clamp pad 8, is composed of a pad main body 11 made of an iron plate and a rubber pad 12 adhered to the pad main body 11, as in the conventional case. The pad body 11 is formed in a substantially rectangular shape that is long in the vehicle width direction (left-right direction) and is formed in an inwardly curved shape that gently curves in the front-rear direction.
A plurality of concave portions 11a (three in the figure are shown) having a substantially rectangular shape for attaching the rubber pad 12 are arranged side by side in the longitudinal direction.

A pad pool 13 is formed at the rear end of each recess 11a formed in the pad body 11 and extends over the entire length in the width direction. As shown in FIG. 3, the pad reservoir 13 is formed in a generally dovetail-shaped cross section, and a plurality of small holes 14 for degassing are formed at appropriate places through the outer surface. And
The rubber pads 12 are fitted into the respective recesses 11a of the pad body 11 and are bonded by baking.

The rubber pad 12 is formed in a sheet shape corresponding to the shape of the recess 11a of the pad body 11, and is formed to be slightly thicker than the depth of the recess 11a. Therefore, when the rubber pad 12 is bonded to the recess 11a, the surface of the rubber pad 12 on the gripping surface side is slightly attached to the surface of the pad body 11.

During the baking process of the rubber pad 12, the contact surface of the rubber pad 12 with the recess 11a is melted and then solidified to be bonded, but a part of the rubber pad 12 flows into the pad pool 13 during the melting. Therefore, the pad main body 11 and the rubber pad 12 after the bonding are formed with the engaging portions 15 which are engaged with each other. The gas generated during the baking process is released from the small holes 14 of the pad reservoir 13 to the outer surface side. This is effective in avoiding adhesion failure due to residual gas.

Now, according to the clamp pad 8 according to the first embodiment configured as described above, the roll-shaped article W is
At the time of gripping, the rear end portion of the rubber pad 12 of the clamp pad 8 held in the outwardly open posture as shown in the drawing comes into contact with the outer peripheral surface of the roll-shaped article W earliest, and then the rear end thereof is pushed. The rolled article W is gripped by turning inward.

Therefore, in the initial stage of the gripping action, the peeling force P in the horizontal direction for peeling the rubber pad 12 from the pad body 11 is applied to the rear end portion of the rubber pad 12. Since the engaging portion 15 provided at the end of the bonding surface with the rubber pad 12 resists, the rear end of the rubber pad 12 becomes difficult to peel off. Further, since the engagement portion 15 suppresses the peeling force P applied to the rear end portion of the rubber pad 12 from reaching the central adhesive surface, even if the rear end portion of the rubber pad 12 is peeled off, the peeling off Effectively prevent the spread of the to reach the central side.

Further, in the present embodiment, since the engaging portions 15 are formed on the flat surface portion and the vertical surface portion at the corner of the pad bonding surface, respectively, they effectively resist the peeling force applied in the lateral direction. be able to. Also, pad pool 1
Since 3 is formed in a substantially dovetail shape, even if a peeling force for peeling the rubber pad 12 from the pad main body 11 in the gripping surface direction is applied, it can be counteracted, and the peeling suppression effect of the rubber pad 12 is further improved. Be improved.

By the way, in the case of the rubber pad 12 which is adhered by the above-mentioned baking, the rubber pad can be formed thinner than the rubber pad which is adhered by using an adhesive, but when a part of the rubber pad 12 is peeled off, it is elastic. The peeling phenomenon easily expands due to the low absorption performance of the peeling force P due to deformation. Therefore, it is more effective in the case of the clamp pad 8 having the rubber pad 12 of the type that is adhered by baking as in the present embodiment.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the pad body 11 is
In the clamp pad 8 composed of the rubber pad 12 adhered thereto, the gripping surface edge 12a is adhered by providing the step portion 16 at the rear edge of the rubber pad 12 that comes into earliest contact when gripping the roll-shaped article W. It is arranged so as to be separated from the surface edge portion 12b. This makes it possible to weaken the peeling force P applied to the adhesive surface edge portion 12b. The gripping surface edge 12a is preferably chamfered as shown.

When the step portion 16 is provided at the rear edge portion of the rubber pad 12 as in the present embodiment, the gap between the grip surface edge portion 11a and the adhesive surface edge portion 12b is different from the conventional case shown in FIG. The distance between can be increased. Therefore, both edges 11
The elastic deformation amount of the rubber between a and 11b can be made large, and the performance of absorbing the peeling force P due to the elastic deformation becomes high. As a result, the peeling force P exerted on the bonding surface edge portion 11b is reduced, and as a result, the rubber pad 12 becomes difficult to peel off.

The present invention is not limited to the above-described embodiment, and the following modifications can be made without departing from the scope of the invention. (1) In the first embodiment, when the rubber pad 12 is baked, the molten rubber flows into the pad pool 13 to form the engaging portion 15. However, instead of this, as shown in FIG. For example, a dovetail-shaped protrusion 11b may be set on the surface of the recess 11a of the main body 11, and the engaging portion 15 may be formed by surrounding it with molten rubber when the rubber pad 12 is baked.

(2) In the first and second embodiments, the rear end portion of the clamp pad 8 is provided corresponding to the peculiarities of the roll clamp device in which the clamp pad 8 is held in the outwardly opened posture by the spring. Although the engaging portion 15 is set, the engaging portion 15 may be set at the front end portion or the central portion in addition to the rear end portion. Further, in that case, it is also possible to form in a lattice shape crossing vertically and horizontally. (3) The cross-sectional shape of the engaging portion 15 may be a shape other than the dovetail shape. (4) Adhesion of the rubber pad 12 to the pad body 11 is not limited to seizure, and an adhesive may be used. In that case, the engagement portion 15 has unevenness formed on the adhesive surface between the pad body 11 and the rubber pad 12. It is to be configured by fitting. (5) A combination of the first embodiment and the second embodiment, that is, the engaging portion 15 is provided on the bonding surface between the pad body 11 and the rubber pad 12, while the step portion 16 is provided on the edge of the rubber pad 12. May be provided. In that case, the effect of suppressing the peeling of the rubber pad 12 can be further enhanced.

The embodiment of the present invention has been described above.
It should be additionally noted that this embodiment includes the following technical matters in addition to the technical matters described in the claims. (1) In the roll clamp device for a forklift according to claim 1, the engaging portion is baked and adhered to the pad main body formed in the pad main body and having a groove-shaped cross section extending in the vehicle width direction. A roll clamp device for a forklift, which is formed by the inflow of molten rubber from a rubber pad. According to this, it is possible to provide a technique for preventing the rubber pad from peeling off without complicating the work of attaching the rubber pad to the pad body. (2) The roll clamp device for a forklift according to claim 1, wherein a step portion is provided at an edge portion of the rubber pad to move a grip surface edge portion away from an adhesive surface edge portion. According to this, it is possible to obtain a higher effect of suppressing the peeling of the rubber pad.

[0025]

As described above in detail, according to the first and second aspects of the present invention, it is possible to provide the roll clamp device provided with the clamp pad in which the rubber pad is not easily peeled off from the pad body.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a clamp pad according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view of a portion B in FIG. 2;

FIG. 4 is a sectional view of a main part of a clamp pad according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a modified example regarding a locking portion.

FIG. 6 is an overall side view of a roll clamp device.

FIG. 7 is an enlarged view of a portion C in FIG. 6;

[Explanation of symbols]

 8 ... Clamp pad 11 ... Pad main body 12 ... Rubber pad 13 ... Pad pool 15 ... Engagement part 16 ... Step part

Claims (2)

[Claims] 1. A roll clamp device for a forklift including a clamp pad comprising a pad main body and a sheet-shaped rubber pad adhered to the pad main body, in the vicinity of an edge of an adhesive surface between the pad main body and the rubber pad. , A roll clamp device for a forklift in which engaging portions for engaging with each other for suppressing the peeling force applied to the rubber pad are set. 2. A roll clamping device for a forklift, comprising a clamp pad comprising a pad body and a sheet-shaped rubber pad adhered to the pad body, wherein a gripping surface edge portion is provided on the edge portion of the rubber pad. Roll clamp device for forklift trucks that has a stepped portion that moves away from the section.