JPH09266017A - Wire connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide good operability and to subject a conductive sleeve capable of plastic deformation to parallel compression at wider intervals than usual to provide the required strength for connecting a wire using a wire connector of the type in which the sleeve is used as a connecting element. SOLUTION: In a wire connector A, a conductive sleeve 1 is equipped with a cylindrical insulating cover 2 whose end is elongated from the end of the sleeve 1, and a bush 3 that fits into the end of the insulating cover 2 is attached to the wire connector A. The bush 3 has a tapered inner surface at its inlet, and a plurality of projections 3a whose ends abut to the inner surface of the open end of the insulating cover 2 are formed on the outer peripheral surface of the bush 3 as they are aligned in the longitudinal direction of the bush 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connector for connecting electric wires such as a transmission line and a distribution line, and more specifically, a plastically deformable conductive sleeve is used as a connecting element, and the electric wire is connected to the sleeve. Insert the end and press the sleeve from the outside to compress the wire to connect the wire connected end,
The present invention relates to an electric wire connector of a type in which pressurization and compression for the connection are performed in parallel in multiple stages in the sleeve length direction.

[0002]

2. Description of the Related Art Conventionally, this type of electric wire connector is
A sleeve as a connecting element is separate from the tubular insulation coating. Therefore, when connecting the electric wires, it is necessary to previously fit the insulating coating on one of the electric wires, and after the compression of the sleeve, move the insulating coating to the position of the sleeve, that is, fit it.

This conventional technique has the following problems.

When an electric wire such as a power transmission line or a distribution line is inserted into the sleeve, the winding of the electric wire wound on the reel before that causes the sleeve to warp in an arc shape, so that the insulating coating is fitted on the sleeve. Will be difficult. Further, since the sleeve is separate from the insulating coating, in order to obtain the required connection strength of the electric wire, it is necessary to make the parallel intervals of pressure compression for connecting the electric wire of the sleeve relatively small. Because of these, workability is poor.

[0005]

An object of the present invention is to provide an electric wire connector of the type shown above, as compared with the prior art described above.
The workability is good, and the parallel intervals of compression applied to the sleeve are coarser than in the past, so that the strength required for wire connection can be obtained.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a plastically deformable conductive sleeve as an electric wire connecting element is provided with a cylindrical insulating coating whose end extends longer than the end of the sleeve. The bushing is fitted on the end of the insulating coating. The bush has a tapered inner surface on the inlet side that widens on the mouth end side. It is preferable that the inner surface of the mouth end portion of the sleeve also has a wide tapered shape on the mouth end side. On the outer peripheral surface of the bush, projections whose tips contact the inner surface of the insulating coating when the bush is inserted into the end portion of the insulating coating are formed in parallel in the length direction of the bush.

Here, the inlet portion of the bush means a bush end portion on the insulating coating mouth end side in a state where the bush is fitted in the insulating coating end portion. This is the same for the description in the claims.

Preferably, the protrusion on the outer peripheral surface of the bush is
The bush has a wedge-shaped cross section in which a surface of the bush opposite to the entrance side, that is, the surface on the back side is inclined from the back side to the entrance side, and more preferably such a wedge shape and a ring extending along the circumference of the bush. It is a shape. The protrusion having such a configuration is
By inserting the bush into the mouth end of the insulation coating with the inlet side facing back, the insertion is made smooth and easy, and after insertion, the tip of the protrusion comes into contact with the inner surface of the insulation coating to help prevent the bush from coming off. To do.

The bush may have a flange at the inlet end. This flange serves to define the insertion depth of the bush.

In the present invention, since the sleeve as the electric wire connecting element is fitted with the insulating coating, in other words, with the insulating coating, it is not necessary to fit the insulating coating to one of the electric wires when connecting the electric wires, unlike the conventional case. Further, it is not necessary to cover the sleeve with an insulating coating after connecting the wires. Therefore, the sleeve is reinforced by the outer fitting of the insulating coating, the parallel interval of compression applied to the sleeve to obtain the necessary connection strength may be coarser than before, and the workability of wire connection is improved.

According to the present invention, the end of the insulating coating fitted on the sleeve extends longer than the end of the sleeve, and the bush is inserted into the mouth end of the insulating coating. The inner surface of the entrance of the bush is tapered. Therefore, by inserting the bush into the mouth end portion of the insulation coating with the entrance side being the back side, the bush is inserted into the combination of the insulation coating and the sleeve, that is, the electric wire connected end to the electric wire connector. Even serve as a guide to facilitate smoothing. Further, as a result, the bush contributes to enabling the leading insertion of the electric wire connected end into the sleeve mouth end located at the back of the insulating coating mouth end. When the inner surface of the mouth end of the sleeve in the insulating coating is also tapered, the wire itself can be easily and smoothly inserted into the sleeve, so that the workability of wire connection is further improved.

On the outer peripheral surface of the bush according to the present invention, there is formed a projection whose tip abuts against the inner surface of the end portion of the insulating coating when the bush is inserted into the end portion of the insulating coating opening. In this configuration, the bush is fitted into the end portion of the insulating coating by an abutting contact with the tip of the projection, and the interference fit is correlated with the inner diameter of the end portion of the insulating coating and the outer diameter of the bush protrusion. The dimensions can be shared over a range.
The interference fit ensures centering of the bush with respect to the sleeve and ensures a forward leading insertion action of the bush at the wire-connecting end. This interference fit is made elastic when the bushes, including the protrusions, are made of a suitable elastic material such as plastic, which extends the versatility range.

The electric wire connector according to the present invention is particularly suitable for high-voltage wires because it has the above-mentioned effects.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings.

The electric wire connector A has a conductive sleeve 1 made of aluminum or the like which can be plastically deformed, and a cylindrical insulating coating 2 which is fitted onto the sleeve 1 and which is integrated with the sleeve by appropriate means. The end of the insulating coating 2 extends longer than the end of the sleeve 1. The electric wire connector A also has an insulator bushing 3 inserted into the mouth end of the insulation coating 2.

The inner surface of the mouth end portion of the bush 3 is formed in a wide taper shape on the mouth end side. By applying the bush 3 having the tapered inner surface of the mouth end, as described above, the conductive sleeve 1 is formed.
It is possible to easily and smoothly insert the electric wire connected end into the electric wire connector A, including leading introduction of the electric wire (not shown) connected end to the electric wire, and to obtain good workability of electric wire connection.

Since the sleeve 1 as the connecting element is provided with the insulating coating, the workability can be improved as already described.

On the outer peripheral surface of the bush 3, the bush 3 is fitted so that the bush 3 is fitted into the insulating coating 2 by interference fitting.
When the insulating coating 2 is inserted into the mouth end portion of the insulating coating 2, a protrusion 3a whose tip abuts on the inner surface of the mouth end portion is formed in parallel in the longitudinal direction of the bush 3. For the reason described above, it is preferable that the projection 3 has a wedge-shaped cross section in which the surface on the rear end side of the bush is inclined from the rear end side toward the inlet side.

In the illustrated embodiment, the bush 3 has the structure having the flange 3b on the mouth end side.

In the figure, reference numeral 4 is a cap for covering the mouth end portion of the electric wire connector A, which has a thin bottom as in the conventional case, and when the electric wire is connected, the bottom is pierced by an appropriate means to connect the electric wire. Insert the end into the wire connector.

[0021]

As is apparent from the above, the present invention provides an electric wire connector of the type described at the beginning, which has better workability than the prior art, and moreover the parallel spacing of compression applied to the sleeve as the connecting element is higher than that of the prior art. The effect that the strength required for electric wire connection can be obtained at coarse intervals.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of an electric wire connector according to the present invention.

[Zu 2] FIG. 2 is a sectional view showing a conductive sleeve with an insulating coating, a bush and a cap of the electric wire connector shown in FIG. 1 separately.

FIG. 3 is an enlarged view of the bush shown in FIGS.

[Explanation of symbols]

 A Electric wire connector 1 Conductive sleeve 2 Insulation coating 3 Bushing 3a Bushing outer peripheral surface 3b Bushing flange 4 Cap

Claims (5)

[Claims] 1. A plastically deformable conductive sleeve, a tubular insulating coating fitted on the sleeve and having an end extending longer than the end of the sleeve, and a bush fitted on the end of the insulating coating. An electric wire connector characterized in that an inner surface of a mouth end portion of the bush is tapered, and a protrusion whose tip abuts the inner surface of the insulating coating is formed in parallel on the outer peripheral surface of the bush in the bush length direction. . 2. The electric wire connector according to claim 1, wherein the inner surface of the mouth end portion of the conductive sleeve is also tapered. 3. The electric wire connector according to claim 1, wherein the projection on the outer peripheral surface of the bush has a wedge-shaped cross section in which the surface on the rear end side of the bush is inclined. 4. The electric wire connector according to claim 1, wherein the bush has a flange on the mouth end side. 5. The electric wire connector according to claim 1, wherein the bush including the projection on the outer peripheral surface is made of plastic.