JPS581300B2 - Yorisen wire rope tongue matsubu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for compressing and fixing end portions of stranded wires, wire ropes, etc.

Conventionally, there are the following methods for securing the terminals of stranded wires, wire ropes, etc., but they all have defects when subjected to repeated stress under high tension, and cannot be said to be sufficient for practical use. .

Structure using compression method - This is a structure in which the end sleeve and the stranded wire are fixed by compression and supported by the frictional force between the layers, but since it cannot withstand forces greater than the frictional force, it will deteriorate due to small frictional force or repeated loading. It is not suitable for such cases.

Structure using the wedge method: A triangular pyramid-shaped wedge is inserted into the strands at the end, and these are covered and compressed with a terminal sleeve. Fundamentally, this is also due to the friction between the sleeve, the stranded wire, and the wedge. It relies on force and has the same flaws as the compression method.

In particular, a force that tries to push the wedge out of the end face of the stranded wire acts, and there is a risk that the stranded wire may slip out of the sleeve.

In the structure of either method, especially in the case of thick stranded wires, the sleeve and the outermost layer of the stranded wires can be firmly fixed to some extent, but slippage occurs between the inner layers of the stranded wires, resulting in imbalanced stress sharing between the strands.

The present invention has been made in view of the above-mentioned current situation, and provides a new and effective terminal part that can eliminate the drawbacks of the conventional method described above by making the wedge inserted between the strands into a special shape. The purpose is to provide

Four embodiments of the present invention will be described with reference to FIGS. 1 to 4.

In the embodiment shown in FIG. 1, a wedge 2 having an enlarged portion is driven between the terminal strands of a stranded wire 1, and these are covered with a terminal sleeve 3 to give the strands a bend along the shape of the wedge. It is a structure.

In the embodiment shown in FIG. 2, a wedge 22 consisting of an enlarged portion 221 and a strut portion 222 is driven between the end strands of the stranded wire 21, the rear strut portion 222 is removed, and the wedge 22 is covered with a terminal sleeve 23. It has a structure in which the strands are compressed and bent to follow the shape of a wedge.

In the embodiment shown in FIG. 3, a wedge 32 having an enlarged portion is driven between the ends of the strands of the stranded wire 31, and the wedges 32 are covered with an end sleeve 33 having a shape that creates unevenness on the inner surface after compression. It has a structure in which the wire is curved uniformly along the unevenness from the outer layer to the inner layer.

In the embodiment shown in FIG. 4, a wedge 42 consisting of an enlarged portion 421 and a small diameter portion 422 is driven between the strands at the end of the stranded wire 41, and the wedge 42 is compressed into a terminal sleeve shaped so that unevenness is generated on the inner surface. 43 and compressed to form a wire from the outer layer to the inner layer.
It has a structure that is curved to follow the unevenness.

In this case, the small diameter portion 422 is formed by the enlarged portion 4 like a wedge in FIG.
As a structure that can be separated from 21, it may be a structure that is removed after being implanted between the strands.

In each of the above embodiments, only one wedge is used, but
The present invention is not limited to this, and a plurality of them may be used.

Further, as a specific example of the terminal sleeve used in FIGS. 3 and 4, which has a shape in which the inner surface is uneven after being compressed, there is, for example, one having an uneven shape on the inner or outer surface.

The terminal section of the present invention described above has the following effects.

(1) Since the wire is bent along the wedge shape, the effective frictional force is greatly increased.

(2) Due to the wedge effect in the center, even if the frictional force decreases, the wire will not come out of the sleeve.

(3) If the wedge shape is thick at the head and narrow at the rear, the wedge will not be pushed out.

(4) By appropriately selecting the shape of the wedge, it is possible to uniformly bend the stranded wire from the inner layer to the outer layer, so that the stress distribution from the inner layer to the outer layer can be made uniform.

In particular, in the embodiment structures shown in FIGS. 3 and 4, the inner surface of the sleeve also becomes non-smooth after being compressed, so this effect is further enhanced and the sleeve becomes perfect.

[Brief explanation of the drawing]

1 to 4 are longitudinal half-cut explanatory diagrams showing four embodiments of the terminal portion of the present invention. 1...Twisted wire, 2...Wedge, 3...Terminal sleeve.

Claims (1)

[Scope of Claims] 1. In a terminal portion formed by providing a wedge between the terminal wires of a stranded wire, wire rope, etc., and covering and compressing these with a terminal sleeve, the wedge has an enlarged portion at least in part. An end portion of a stranded wire, wire rope, etc., characterized by having a shape of . 2. An end portion of a stranded wire, wire rope, etc., as described in the specified invention in the preceding paragraph, wherein the end sleeve has a shape such that the inner surface thereof after compression is non-smooth.