JPH11187524A - Aluminum sleeve for wire anchoring clamp and wire protective member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum sleeve by which a wire is protected from crushing at the end of the aluminum sleeve when the wire and an anchoring clamp are made to pass through a hanging sheave together, and provide a wire protective member attached to the aluminum sleeve. SOLUTION: In an insertion hole 3 of non-compressed part of tip side of an aluminum sleeve 3, a large diameter part 3e, and a tapered part 3f which is continuous to the large diameter part 3e and whose diameter is widened toward the tip side, are formed. On the other hand, a wire protective member 5 is composed of a cylindrical unit with a cut for expansion for the insertion of a wire E and has a small cylinder part 5b fitted to the large diameter part 3e of the aluminum sleeve 3, a tapered part 5c which is fitted to the tapered part 3f and whose diameter is narrowed toward the tip side and an exposed part 5d which is exposed from the tip end of the aluminum sleeve 3. When the wire E and an anchoring clamp are made to pass through a hanging sheave, the bending angle of the wire E near the end of the aluminum sleeve 3 is relieved and an excessive burden is not applied to that part and the compression contact of the wire E with the opening edge of the sleeve 3 can be avoided and hence the wire E is protected from a damage. The small cylinder part 5b of the protective member 5 stays in the large diameter part 3e of the aluminum sleeve 3 and the fall-off from the aluminum sleeve 3 can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum sleeve for clamping a wire made of a steel core aluminum stranded wire to a steel tower while the wire is being extended, and a wire protection member used by being attached to the aluminum sleeve. The present invention relates to a structure in which a prefabricated electric wire drawing work smoothly passes through a wheel with electric wires to prevent the aluminum strand at the mouth from being damaged.

[0002]

2. Description of the Related Art A retaining clamp for retaining both ends of an electric wire to a steel tower is provided with a steel sleeve, an aluminum sleeve, and a jumper socket which is mounted after passing a wheel. The steel core wire exposed by cutting the aluminum stranded wire at the end of the electric wire is inserted and crimped into the steel sleeve, and the aluminum sleeve is put thereon and also crimped to integrate the electric wire and the two sleeves. A plurality of electric wires each having a steel sleeve and an aluminum sleeve attached to both ends are connected by wires, and the wire is extended between the plurality of towers through a pulley called a wheel suspended from the tower. Later, a jumper socket is attached to the outside of the aluminum sleeve, and a jumper wire is connected to this. Such a wire drawing method is called a prefabricated wire drawing method.

In the prefabricated wire drawing method, a cylindrical protector is used to prevent the electric wire from being forcibly bent at the mouth of the aluminum sleeve and damaging the aluminum wire when the retaining clamp passes through the wheel. It is performed to wrap the whole of the retention clamp. This protector needs to be removed after passing through the wheel, which is a difficult task.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent an aluminum wire from being forcibly bent at the mouth of an aluminum sleeve when an anchoring clamp passes through a wheel with the wire. It is an object of the present invention to provide a structure of an aluminum sleeve that can be used and an electric wire protection member attached to the structure.

[0005]

In order to solve the above-mentioned problem, an uncompressed portion 3c on the distal end side of the aluminum sleeve 3 is provided.
A large diameter hole 3e is formed in the insertion hole 3d, and a tapered hole 3f is formed on the distal end side of the large diameter hole 3e.

On the other hand, the electric wire protection member 5 is constituted by a cylindrical body provided with a notch 5a in the axial direction for expansion for inserting the electric wire E, and a large-diameter hole portion 3e of the aluminum sleeve 3 is formed from one end side.
, A tapered tapered portion 5c fitted into the tapered hole 3f, and an exposed portion 5d exposed from the aluminum sleeve 3 to the distal end side.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a retaining clamp, FIG. 2 is a front view of a steel sleeve, FIG. 3 is a front view of an aluminum sleeve, FIG.
Is a partially enlarged view of an aluminum sleeve to which an electric wire protection member is attached, and FIG. 5 is a perspective view of the electric wire protection member.

In FIG. 1, the retaining clamp 1 includes a steel sleeve 2, an aluminum sleeve 3, and a jumper socket 4 mounted after passing through a wheel. The steel core wire, which is obtained by cutting the aluminum stranded wire at the end of the electric wire E, is inserted into the steel sleeve 2 and crimped, and the aluminum sleeve 3 is put thereon and also crimped. Are integrated.

As shown in FIG. 2, the steel sleeve 2 has a tab 2a, a steel core wire compression part 2b, a stepped part 2c, and an extension part 2d. After inserting the steel core wire of the electric wire E into the steel sleeve 2,
The steel core wire compression part 2b is compressed and integrated.

As shown in FIG. 3, the aluminum sleeve 3
Jumper socket connection part 3a, compression part 3b, non-compression part 3
c. After the electric wire E and the steel sleeve 2 are inserted into the insertion hole 3d, the compression part 3b is compressed and integrated. In the insertion hole 3d, a portion corresponding to the non-compressed portion 3c on the distal end side is formed with a large-diameter hole portion 3e and a tapered hole portion 3f which is convergent and extends to the distal end side. The diameter of the large diameter hole 3e and the diameter of the tapered hole 3f are sufficiently larger than the diameter of the electric wire E to be inserted, and a gap is formed between the large diameter hole 3e and the outer periphery of the electric wire E. Since this portion is not compressed, a gap remains after the compression connection. At the time of wire drawing work, an electric wire protection member 5 made of an elastic synthetic resin is provided in this gap.
Is inserted (FIG. 5).

As shown in FIG. 4, the electric wire protection member 5 is a cylindrical body provided with a notch 5a in the axial direction for expansion for inserting the electric wire E, and has a large diameter of the aluminum sleeve 3 from one end side. A small cylindrical portion 5b fitted in the hole 3e, a tapered tapered portion 5c fitted in the tapered hole 3f, and an exposed portion 5d exposed from the aluminum sleeve 3 to the distal end side are sequentially provided.

In this embodiment, after the steel sleeve 2 and the aluminum sleeve 3 are crimped and integrated with the end of the electric wire, the notch 5a of the electric wire protection member 5 is elastically expanded and the electric wire is inserted. Press into the gap between the aluminum sleeve 3 and the electric wire E on the tip side. Then, the non-compressed portion 3c of the aluminum sleeve 3
A rubber tube (not shown) is wound around and fixed from the wire protection member 5 to the wire protection member 5.

[0013] In the wire drawing operation, the pulling clamp 1
When the wire passes through the wheel P together with the electric wire E, the electric wire portion located at the mouth of the aluminum sleeve 3 is bent as shown in FIG. 6, but the electric wire protection member 5 is interposed between the aluminum sleeve 3 and the electric wire E. Therefore, the electric wire E does not come into direct contact with the opening edge of the aluminum sleeve 3 and the bent portion becomes gentle. For this reason, an unreasonable load is not applied to the electric wire, and damage is avoided. When the electric wire E is bent, an action of pushing out the protection member 5 from the aluminum sleeve 3 occurs. However, the small cylindrical portion 5b of the protection member 5 is large-diameter hole portion 3e of the aluminum sleeve 3.
It stays inside and is sandwiched between the aluminum sleeve 3 and the electric wire E, so that escape is prevented.

[0014]

As described above, according to the present invention, the large-diameter hole portion 3e is formed in the insertion hole 3 of the uncompressed portion 3c on the distal end side of the aluminum sleeve 3, and the tapered portion is then expanded toward the distal end side. While forming the hole 3f, the wire protection member 5
It is constituted by a cylindrical body provided with a notch 5a for expansion for inserting the electric wire E, and is fitted in a small cylindrical portion 5b fitted in the large diameter hole 3e of the aluminum sleeve 3 and a tapered hole portion 3f. Since the tapered portion 5c is tapered and the exposed portion 5d is exposed from the aluminum sleeve 3 toward the distal end, the electric wire E near the mouth of the aluminum sleeve 3 when passing through the wheel P in the wire drawing work of the electric wire E. Since the bending angle is dulled, an unreasonable load is not applied to the electric wire E and the press-contact with the opening edge of the aluminum sleeve 3 is avoided, the electric wire E can be prevented from being damaged. Further, the protection member 5 can be easily attached to and detached from the electric wire E, and the small cylindrical portion 5b stays in the large-diameter hole 3e of the aluminum sleeve 3 to prevent the aluminum member 3 from slipping out. 1 has an effect that the wire drawing work can be smoothly performed.

[Brief description of the drawings]

FIG. 1 is a front view of a retaining clamp and an electric wire protection material according to the present invention.

FIG. 2 is a front view of a steel sleeve.

FIG. 3 is a front view of the aluminum sleeve.

FIG. 4 is a perspective view of an electric wire protection member.

FIG. 5 is a sectional view of an aluminum sleeve and an electric wire protection material.

FIG. 6 is a front view of the aluminum sleeve and the electric wire protection member when passing through the wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retention clamp 2 Steel sleeve 3 Aluminum sleeve 3c Uncompressed part 3f Tapered hole part 5 Wire protection member 5a Cut 5b Small cylindrical part 5c Tapered part 5d Exposed part E Electric wire

Claims (3)

[Claims] An electric wire is inserted into an insertion hole when an electric wire is inserted between a steel tower and an aluminum sleeve for an end clamp which is compression-connected to an outer periphery of an end of the electric wire. A wire protection member made of an elastic resin to be mounted on the distal end side of the aluminum sleeve by covering the aluminum sleeve, wherein a large-diameter hole portion and a distal end The wire protection member is a cylindrical body provided with an axial notch for expansion for inserting a wire, from one end side of the aluminum sleeve. An aluminum wire clamping clamp comprising a small cylindrical portion fitted into a large-diameter hole portion, a tapered taper portion fitted into a tapered hole portion, and an exposed portion exposed from the aluminum sleeve to the distal end side. Sleeve and wire protection Wood. 2. A wire protection member made of an elastic resin, which is attached to a distal end side of an aluminum sleeve when the wire with an aluminum sleeve is extended between steel towers through a wheel train, the wire protection member being made of an elastic resin. A cylindrical body provided with an axial notch for expansion for insertion. From one end side, a small cylindrical portion that fits into the large-diameter hole of the aluminum sleeve, and a tapered taper that fits into the tapered hole. An electric wire protection member comprising: a portion; and an exposed portion that is exposed from the aluminum sleeve toward the distal end. 3. An aluminum sleeve for an end clamp extending between a steel tower and a wire wheel together with the electric wire in a state where the electric wire is inserted through the insertion hole and compressed and connected to the outer periphery of the electric wire, wherein the compression at the distal end side is performed. A large-diameter hole portion for fitting the cylindrical portion on one end side of the cylindrical wire protection member made of an elastic resin into the insertion hole of the portion not to be formed, and a tapered portion with a tapered portion for fitting the taper portion of the wire protection member subsequently to this. An aluminum sleeve for an electric wire anchoring clamp having a hole.