JP2006069756A - Processed structure of eye splice end part in sling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processed structure of an eye splice end part of a sling, eliminating exposure of a cut end part to provide excellent safety and durability. <P>SOLUTION: At least one end side part of a wire rope comprising a plurality of strands twisted with each other is bent, and the end part is weaved with a wire rope part to form a circular eye splice in this processed structure of an eye splice end part. The end part of the eye splice to be woven with the wire rope is positioned at a center side part of the wire rope that is not exposed in the outer surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for processing an ice price end in a sling that is used when a heavy object is lifted by hooking on a hook such as a crane or a lift.

  In general, this type of sling has hook hook loops called ice prices formed at both ends of the wire rope. When this loop is formed, the end of the wire rope is bent and the ends are bent. There is one in which the wire rope is aligned in parallel with the wire rope, and the portion is fixed by crimping with a crimping sleeve.

However, in such a case, not only a relatively large crimping tool is required, but also because the end portions are aligned, it is easy to come off depending on the crimping strength of the sleeve, and lacks in strength and durability. There was a problem.
In addition, there is a problem in that the crimped sleeve portion is large and is easily caught or entangled with other objects, and it takes time and effort to insert and remove the sling and the sling operation.

Therefore, the end portion of the wire rope formed by twisting a plurality of strands is bent and the end portion is knitted into the twisted portion of the wire rope, and the end portion of the wire rope protruding from the twisted portion is plied, nippers, etc. The sling is formed by cutting with a cutting tool.
However, with such a device, although the strength and durability are improved, the cut end is exposed, and if the hand touches this end when selecting the operation of slinging and the grade of the sling to be used, it will be damaged. Therefore, thick leather gloves are used to prevent this.
When thick leather gloves are used in this way, not only fine work cannot be performed, but there is also a problem in terms of safety because it is slippery.

In order to cope with these problems, the heat shrink sleeve is shrunk and fixed to the braided part where the cut end is exposed, or the end is cut by winding a steel wire (protective wire). There is something that covers the braided part that exposes.
JP-A-5-132881 Mechanical Engineering Handbook, Revised 5th Edition, 16th edition

However, if the heat-shrink sleeve is shrunk on the braided part where the cut ends are exposed, the heat-shrink sleeve has low wear resistance, so it is worn out early or damaged. There was a problem that it was easily damaged and applied to durability.
Also, in the case of covering the braided part where the end part cut by winding the steel wire is exposed, it has the braided part with one hand and cut with the other hand to wind the steel wire around In order to wind the steel wire around the part where the end is exposed, there is a problem that labor and skill are required.
Furthermore, if a part of the steel wire wound around the braided portion is cut, the steel wire is broken, so there is a problem in durability.
The present invention has been proposed in view of the above problems, and is intended to provide a treatment structure for an ice price end portion in a sling that is excellent in safety and durability without exposing a cut end portion. It is the purpose.

  In order to solve the above problems, the processing structure of the ice price end portion in the sling according to the present invention is such that at least one end side portion of a wire rope formed by twisting a plurality of strands is bent, and the end portion is a wire rope. An ice-price end treatment structure for a sling that is knitted into a ring to form an annular ice price, and the end of the ice-price knitted into the wire rope is positioned at the center of the rope that is not exposed to the outside Is the most important feature.

  In addition, in the processing structure of the ice price end part in the sling, the positions of the ends of the plurality of strands knitted into the wire rope part to form the ice price are different, and the core material that forms the wire rope part is used. It is also characterized in that the end of the ice price to be knitted into the wire rope part is located in the part cut out for a predetermined length, and the core material of the wire rope part is impregnated with a rust preventive agent It is what.

In the present invention, at least one end of a wire rope formed by twisting a plurality of strands is bent to form an ice price loop, and the center of the rope is prevented from being exposed to the outer surface of the wire rope portion. Since it is located on the side portion, the end portion knitted into the rope by forming the ice price is not exposed to the outside, and the surface is kept in a smooth state.
Thereby, there is an advantage that the exposed wire does not hurt the hand as in the prior art, and it is not necessary to work with thick gloves, and fine work can be performed safely and accurately.

  Furthermore, since the cut end of the ice price knitted on the rope is not exposed to the outside, the steel wire is wrapped around the part where the conventional cut end is exposed to cover the knitted part Compared with, the steel wire winding process can be omitted and the productivity can be improved, and if part of the steel wire wound around the braided part is frayed or cut by abrasion, There is also an advantage that the durability can be greatly improved.

  In addition, the positions of the ends of the plurality of strands forming the ice price knitted into the wire rope portion are made different, or the core material forming the wire rope portion is cut to a predetermined length, and the wire is cut into the cut portion. In the case where the end of the ice price to be knitted on the rope is positioned, the rope part where the end of the ice price is knitted becomes a smooth tapered peripheral surface. In addition to the above safety, conventional crimping There is also an advantage that there is no entanglement like that fixed by crimping with a sleeve.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an ice price end processing structure in a sling according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a sling in which ice prices are formed at both end portions. In FIG. 1, reference numeral 1 denotes the sling as a whole.
The sling 1 is formed with loop-shaped ice prices 3 and 3 on which hooks (both not shown) such as cranes and lifts are hooked at both ends of the wire rope portion 2.
Although the detailed illustration of the wire rope portion 2 is omitted, the wire rope portion 2 is a wire rope having a known structure formed by twisting a plurality of steel wires to form a strand, and further twisting the plurality of strands.
As shown in FIG. 2, the ice price 3, 3 is formed by bending the tip end portion of the wire rope and knitting the end portion into the twist of the wire rope portion 2.

The procedure for manufacturing this ice price 3 and 3 will be described in detail below. The ice price 3 and 3 formed at both ends of the sling 1 have the same structure, so the ice price 3 on the left side in FIG. The procedure to do is demonstrated.
First, as shown in FIG. 2, the end portion of the rope is bent into a U shape to form a loop, and the tip portion is disassembled into six strands A to F. Prior to this, the core member 4 of the rope portion 2 is pulled out from the central portion and cut out by a predetermined length.
Incidentally, this core material is made by impregnating a string of straw with a rust preventive agent such as oil.

Next, the six strands A to F that have been disassembled are cut into lengths as shown in FIG.
This length is knitted in accordance with the twist of the rope portion 2, that is, a length corresponding to three twists of the rope portion 2 in the strand A, and five twists of the rope portion 2 in the strand B. The length corresponding to 3 turns of the twist of the rope part 2 in the strand C, the length equivalent to 7 turns of the twist of the rope part 2 in the strand D, and the rope part in the strand E The strand F is formed to have a length corresponding to four rotations of the twist of 2, and the strand F is formed to have a length corresponding to three rotations of the rope portion 2.

The reason why the lengths of the six strands A to F are made different is to prevent the end portions from being located at the same position when the end portions of the respective strands are knitted into the rope portion. Regardless, the reason why the strand A and the strand C have a length corresponding to three rotations of the same rope portion is that the positions of the strand A and the strand C are different.
That is, the strand A is knitted immediately because it is close to the rope portion, but the strand C does not coincide with the strand A because the strand C wraps around from the outermost contour.

Next, when the disassembled six strands A to F are knitted, each strand A to F is cut to a predetermined length as described above, so that the core of the rope portion 2 as shown in FIG. The material 4 is knitted into the central position where the material 4 is cut out in a state where the positions of the end portions are different.
Thus, when the six strands A to F are knitted, the ice price 3 is formed, and each strand A to F knitted on the rope portion 2 is cut to a predetermined length as described above. Therefore, as shown in FIG. 3, the outer periphery of the rope portion 2 has a smooth tapered surface that is thick at the ice price 3 side portion as shown in FIG.
Therefore, even if the tapered surface is touched with a bare hand, the hand is not damaged, and a fine work can be performed safely and accurately.

In the above embodiment, the rope is formed by the six strands A to F. However, the rope is not limited to this, and the rope may be formed by a plurality of strands A to F. The present invention can be implemented.
Moreover, in the said embodiment, although the core material 4 is cut | disconnected, when it is a flexible thing like what impregnated rust preventives, such as oil, in the string of a heel like the said Example Of course, the core material does not necessarily have to be cut.

It is a perspective view of the sling which formed the ice price in the both ends. It is a front view of the process of forming an ice price part. It is a vertical side view which shows the edge part of each sling which formed the ice price and was knitted in the rope part. It is an enlarged view of the part which formed the ice price and the edge part of each sling was knitted in the rope part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sling 2 ... Wire rope part 3 ... Ice price 4 ... Core material

Claims (4)

  A sling ice price end treatment structure in which at least one end side portion of a wire rope formed by twisting a plurality of strands is bent and the end portion is knitted into the wire rope portion to form an annular ice price. A structure for processing an ice price end in a sling, characterized in that the end of the ice price knitted into the wire rope is positioned at the center side portion of the rope not exposed to the outer surface.   The processing structure of the ice price end portion in the sling according to claim 1, wherein the positions of the ends of the plurality of strands knitted into the wire rope portion to form the ice price are made different.   The ice price in the sling according to claim 2, wherein the core material forming the wire rope portion is cut to a predetermined length, and an end portion of the ice price knitted into the wire rope portion is positioned in the cut portion. End processing structure.   The processing structure of the ice price end portion in the sling according to claim 3, wherein the core material of the wire rope portion is impregnated with a rust preventive agent.

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