JP2003321188A - Protective cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cap with high durability for preventing damages by protecting a power lock part with a thimble at a rope end such as a rope for a slinging work. <P>SOLUTION: In this protective cap, a flexible cap member 4 is constituted into a shape for coating from a main rope part 2 near a rope joint part 2A to the middle of a power lock part A with a thimble. The cap member 4 at the end on the side for coating the main rope part 2 of the cap member 4 is indented inwards of the cap member 4 without installing a bend protection part projecting along a longitudinal direction of the coated main rope part 2 and bent and deformed together with a bending action of the main rope part 2, so that an indentation part 5 is formed as a main rope arrangement part 5. The indented inner face of the main rope arrangement part 5 is formed into such a shape that an outer side gets larger in diameter, so as to generate a gap 6 between the main rope arrangement part 5 and the entire periphery of the main rope part 2 arranged in the main rope arrangement part 5. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cap that protects a power lock portion with a thimble at a rope end portion such as a sling rope to prevent damage.

[0002]

2. Description of the Related Art As a protective cap of this kind, the applicant of the present invention has disclosed a patent No. 295851.
No. 7 is secured.

Briefly explaining this Japanese Patent No. 2985517, a protective cap is formed in such a shape that it can be protected by covering the main rope portion close to the rope mating portion so as to wrap around the power lock portion with thimble. According to this prior application, even if the rope is pulled at a slightly inclined angle during the lifting work of the suspended object, the metal ring and the upper part of the thimble are tilted substantially integrally by the protective cap, so that the lower end part of the metal ring and the thimble are tilted. The upper end of the main rope is prevented from hitting the strand of the main rope, preventing the risk of cracking or cutting the strand of the main rope, and protecting the exposed end of the rope that is joined through the thimble. Since it is covered with a cap, it is protected from the frustration of the rope end touching the hands and fingers directly and damaging the hands and fingers. In addition, it prevents rainwater from entering the rope ends and rope joints to prevent rusting of the rope strands, and there is no risk that the power lock part will directly contact the suspended object and damage it. It is effective and very practical.

By the way, in the embodiment of Japanese Patent No. 2985517, the main rope portion is provided so as to project along the length direction of the covered main rope portion at the end portion of the end portion of the protective cap which covers the main rope portion. The structure is provided with a bending protection portion that bends and deforms in accordance with the bending operation.

However, it has been found that the structure provided with such a bending protection portion may cause the bending protection portion, which is bent and deformed together with the main rope portion, to be exhausted during long use. Came.

[0006] Therefore, the inventor of the present invention has proposed this patent No. 2958.
By making a simple improvement to No. 517, an epoch-making protective cap capable of solving the above problems was completed.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

A protective cap for protecting the power lock portion A with thimble at the end of the rope in which the rope fitting portion 2A fitted through the thimble 1 is fixed by the metal ring 3.
The flexible cap body 4 is attached to the rope fitting portion 2
The main rope portion 2 in the vicinity of A to the middle of the power lock portion A with a thimble is configured to be covered, and the end portion of the cap body 4 on the side for covering the main rope portion 2 is covered with the main rope portion 2 The end portion of the cap body 4 is recessed inwardly of the cap body 4 without providing a bending protection portion that projects along the length direction of the main rope portion 2 and bends and deforms in accordance with the bending operation of the main rope portion 2. The concave portion 5 is used as the main rope arrangement portion 5, and the inner surface of the concave portion of the main rope arrangement portion 5 is formed so as to have a larger diameter toward the outside. The present invention relates to a protective cap, characterized in that a gap 6 is formed between the main rope portion 2 and the entire circumference of the main rope portion 2.

Further, the cap body 4 is formed in a cylindrical shape,
The inner shape of one end portion of the tubular cap body 4 is formed to cover the middle of the hooking portion A1 of the power lock portion A with thimble, and the inner shape of the intermediate portion of the tubular cap body 4 is formed. Is formed into a shape capable of covering the metal ring 3,
The inner shape of the other end portion of the tubular cap body 4 can cover the outer shape of the main rope portion 2 and becomes larger in diameter toward the outer side to form a gap 6 between the entire circumference of the main rope portion 2. The protective cap according to claim 1, wherein the protective cap is formed in a shape and configured in the main rope arrangement portion 5.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention (how to carry out the invention) will be briefly described with reference to the drawings and showing its function and effect.

At the end of the cap body 4 that covers the main rope portion 2, a projection is provided along the lengthwise direction of the covered main rope portion 2, and the main rope portion 2 is bent and deformed as the main rope portion 2 is bent. Since the protective portion is not provided, there is no inconvenience that the bending protective portion is broken due to aged use unlike the prior application (Japanese Patent No. 2958517) described in the section of the prior art.

Further, since the main rope portion 2 arranged in the main rope arrangement portion 5 having a larger diameter toward the outer side has a gap 6 with the rope arrangement portion 5 over the entire circumference, this gap 6 Therefore, the bending operation can be freely performed without imposing a load on the rope arrangement portion 5.

Therefore, in addition to the action and effect of the above-mentioned prior patent, the cap body 4 is less likely to be loaded by the rope bending operation, and the durability is improved accordingly, which is an epoch-making excellent in practical use. It becomes a protective cap.

Further, for example, the cap body 4 is formed in a tubular shape, and the inner shape of one end portion of the tubular cap body 4 is covered up to the middle of the hanging ring portion A1 of the power lock portion A with a thimble. And the inner shape of the middle portion of the tubular cap body 4 is formed to cover the metal ring 3, and the inner shape of the other end of the tubular cap body 4 is set to the main shape. If the outer shape of the rope portion 2 can be covered and the outer diameter becomes larger, a gap 6 is formed between the rope portion 2 and the entire circumference of the main rope portion 2 to form the main rope arrangement portion 5. It is possible to easily design and realize a protective cap that reliably exhibits the above-mentioned effects, and moreover, due to the internal shape of the cap body 4, the cap body 4 is less likely to be displaced from the power lock portion A with a thimble in a state of being covered and protected. Be practical.

[0015]

Embodiments of the present invention will be described with reference to the drawings.

The present embodiment is a protective cap that protects the power lock portion A with a thimble at the end of the rope in which the rope fitting portion 2A joined through the thimble 1 is fixed by the metal ring 3 and has flexibility. The cap body 4 is formed in such a shape as to cover the main rope portion 2 near the rope fitting portion 2A to the middle of the power lock portion A with a thimble.

More specifically, the cap body 4 is made of a thick elastic synthetic resin and has flexibility.

As shown in FIGS. 1 and 2, the cap body 4 has a barrel-like shape which is slightly barrel-like when viewed from the front and has an elliptical shape when viewed from above. The main rope portion 2 near the rope matching portion 2A to the middle of the power lock portion A with thimble can be covered.

Further, in this embodiment, the main rope portion 2 of the cap body 4 is provided at the end portion on the side covering the main rope portion 2 so as to project along the length direction of the covered main rope portion 2. The end portion of the cap body 4 is recessed inward of the cap body 4 without providing a bending protection portion that is bent and deformed in accordance with the bending operation, and the recessed portion 5 is used as a main rope disposition portion 5. The inner surface of the concave portion of the rope arranging portion 5 is formed to have a diameter larger toward the outer side, and the main rope arranging portion 5 and the main rope portion 2 arranged in the main rope arranging portion 5 are formed.
It is configured so that a gap 6 is formed between it and the entire circumference.

More specifically, the tubular cap body 4
The inner shape of the other side end portion (upper end portion in the drawing) can cover the outer shape of the main rope portion 2 and becomes larger in diameter toward the outer side to form a gap 6 with the entire circumference of the main rope portion 2. The main rope arrangement portion 5 is formed by forming the main rope.

The main rope portion 2 arranged inside the main rope arrangement portion 5 having a larger diameter toward the outer side has a gap 6 between the main rope arrangement portion 5 and the rope arrangement portion 5, so that FIG. As shown by the imaginary line inside, the rope arrangement part 5 is only for this gap 6 minutes.
It is configured so that it can be flexibly operated without applying a load on the.

Further, the inner shape of one end portion (lower end portion in the drawing) of the cylindrical cap body 4 is brought into close contact with the middle portion of the hooking portion A1 of the power lock portion A with thimble without any substantial gap. The cylindrical cap body 4 is formed in such a shape that it can be covered, and the inner shape of the intermediate portion of the cylindrical cap body 4 is formed in such a shape that the metal ring 3 can be brought into close contact with the metal ring 3 without any gaps and can be covered. When the power lock part A with thimble is covered with, the cap body 4 is attached to the power lock part A with thimble without being displaced.

The method of use of this embodiment will be described. For example, when manufacturing a sling rope or the like, first, both end portions of the main rope portion 2 having a predetermined length are connected to the upper end portion (one side end portion) of the cap body 4. ) Is inserted into the main rope arrangement portion 5, each end portion of each main rope portion 2 is wound around the thimble 1, and the tip end portion thereof is aligned with the main rope portion 2, and the rope alignment portion 2A is made of stainless alloy steel or the like. A metal ring 3 made of a special metal is fitted and fixed (compression is stopped) to form a power lock portion A with a thimble, and the cap body 4 is called back to the power lock portion A with a thimble to attach the power lock portion A with a thimble. Protect.

The present invention is not limited to this embodiment, and the specific constitution of each constituent element can be designed appropriately.

[0025]

As described above, according to the present invention, at the end portion of the cap body that covers the main rope portion, the main rope portion is provided so as to project along the lengthwise direction of the covered main rope portion so as to bend the main rope portion. Since no bending protection part that bends and deforms with it is provided,
As in the case of Japanese Patent No. 2985517 described in the section of the prior art, the inconvenience that the bending protection portion is cut off due to aged use never occurs, and the end of the cap body is recessed inward of the cap body. The recessed part is used as the main rope disposition part, and the recessed inner surface of this main rope disposition part is formed so that the diameter becomes larger toward the outside, and the main rope disposition part and this main rope disposition part are disposed. Since a gap is created between the main rope portion and the entire circumference of the main rope portion, the main rope portion arranged inside this main rope arrangement portion bears the load (load ) Can be freely flexed without applying a load, and the cap body is less likely to be loaded by the rope flexing operation, so the durability is improved by that amount. Becomes

According to the second aspect of the present invention, it is possible to easily design and realize a protective cap that reliably exhibits the above-mentioned effects, and the cap body is displaced with respect to the power lock portion with thimble in the covering protection state. Difficult,
It is a protective cap with a more practical structure.

[Brief description of drawings]

FIG. 1 is an explanatory front view showing a usage state of a present embodiment with a cap body cut out.

FIG. 2 is an exploded explanatory diagram of a use state of the present embodiment.

[Explanation of symbols]

1 thimble 2 Main rope section 2A rope matching section 3 metal ring 4 cap body 5 Main rope installation part (recessed part) Power lock with thimble A1 hanging part

Claims (2)

[Claims] 1. A protection cap for protecting a power lock portion with a thimble at a rope end portion in which a rope fitting portion fitted through a thimble is fixed by a metal ring, wherein a flexible cap body is used for the rope fitting portion. Part of the main rope part from the vicinity of the main rope part to the middle of the power lock part with thimble, the end of the side of the cap body that covers the main rope part, in the length direction of the covered main rope part. This end of the cap body is recessed inward of the cap body without providing a bending protection portion that projects along and bends and deforms as the main rope bends. The inner surface of the concave portion of the main rope installation portion is formed so that the diameter becomes larger toward the outside, and the main rope installation portion and the main rope portion installed inside the main rope installation portion are A protective cap characterized in that a gap is formed between the circumference and the circumference. 2. The cap body is formed in a tubular shape, and the inner shape of one end portion of the tubular cap body is formed in a shape that covers the middle of the hooking portion of the power lock portion with thimble, The inner shape of the intermediate portion of the tubular cap body is formed into a shape capable of covering the metal ring, and the inner shape of the other end portion of the tubular cap body can cover the outer shape of the main rope portion. 2. The protective cap according to claim 1, wherein the protective cap is formed in a shape in which the diameter increases toward the outside and a gap is formed between the main rope and the entire circumference of the main rope.