JPS6331337Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an insulated connector for connecting insulated wires having an insulation coating, and in particular,
The present invention relates to an insulated connector of a type in which a wire receiving portion of the connector is provided with a contact member having a tooth-like protrusion that penetrates the insulation coating and presses against the core wire.

When connecting or branching insulated wires used for overhead power transmission and distribution lines, etc., to avoid the trouble of stripping off the insulation coating, use a contact member with tooth-shaped protrusions on top of the coating while leaving the coating intact. It is known to conduct electricity by breaking through the coating and pressing the tip against the core wire. While many connectors of this type have been proposed, one of them is a contact member made of a conductive material (mainly metal) having tooth-like protrusions that is tightened with a tightening bolt together with the insulating body to sandwich the insulated wire. A connector that retains is proposed.

Generally, plastics such as vinyl and polyethylene, and organic materials such as rubber are used for the covering of covered wires, that is, insulated wires. The elasticity and hardness of these organic materials change depending on temperature, creep over time, etc., and the outer diameter changes, albeit slightly. This physical change in the sheath changes the tightening state of the connector when connecting or branching with the connector, so when the tooth-like projections of the contact member break through the sheath of the sheathed wire and press against the core wire. , making the contact state unstable. Therefore, poor contact may cause accidents such as overheating due to resistance heat of the contact portion or damage to the core wire due to biting.

This invention was made in order to eliminate the above-mentioned drawbacks of conventional connectors, and it is extremely simple and easy to tighten the connector in such a way that the teeth of the contact member are always in stable contact with the core wire. The purpose is to provide an insulated connector with a structure that can be used for various tasks.

For the above purpose, this invention is aimed at controlling the tightening, especially the tightening dimension, by easily compressing and deforming the connector, which is equipped with a contact member having tooth-like protrusions, when the two-split body is bolted together with the contact member. We provide insulated connectors with stoppers made of non-contact materials, such as steel. Conventionally, the tightening force, that is, the tightening torque, was controlled using a torque wrench, etc., to regulate tightening. The instability of the contact between the contact member and the core wire as described cannot be resolved. If the point tightening dimension is always regulated to be constant, steady pressure contact can be performed without insufficient contact or biting of the tooth-like protrusions.

In the following, the invention will be explained with reference to the illustrated embodiments. As shown in the figure, the contact members 1, 1, which are divided into two on a plane containing the central axes O ₁ , O ₂ of the two insulated wires W ₁ , W ₂ to be connected, are the insulation coatings of the wires W ₁ , W ₂ . The contact member is made of a conductive material such as metal, and has tooth-like protrusions 2, 2 _' that penetrate through C _{1 and} C ₂ and press against the core wires I 1 and I 2 of the wire, and the contact member is made of a conductive material such as metal, and the core wires I ₁ , I ₂ connection. These contact members 1, 1 are covered on the outside with insulating main body parts 3, 3' which also have a two-part structure, and the insulating bodies 3, 3' are covered with two-part slip-preventing piece parts 3a. , 3b. As shown in the figure, the insulating body halves 3, 3' and the contact members 1, 1 are tightened with a tightening bolt 4 and a nut 5, with electric wires W ₁ and W ₂ sandwiched between them. In the illustrated embodiment of this invention, a steel stopper collar 6 is provided as a stopper, which is fitted on the outside of the tightening bolt. It has a length dimension that extends between it and the flat washer 7 used on the top surface. The axial length dimension of this stopper collar 6 is such that the tooth-like protrusions 2, 2' of the contact members 1, 1 are connected to the electric wires.
The dimensions are such that the tips of the tooth-like protrusions break through the insulating coating of W ₁ and W ₂ and come into pressure contact with the surface of the core wire (conductive part) of the electric wire at a predetermined pressure.

Therefore, when tightening the bolt 4 gradually, the square nut 5 contacts one surface (lower surface) of the insulating body via the square washer 8, and the flat washer 7 on the other surface (top surface) of the insulating body. At the position where both ends of the stopper collar 6 are in contact with each other, since the stopper collar 6 is made of a material that is not easily compressed and deformed, such as steel, it becomes impossible to screw in the bolt 4, and the distance is maintained by the stopper collar 6. Although further compression of the upper and lower insulating bodies made of soft materials such as synthetic resin is possible between the flat washer 7 and the square nut 5, the length of the stopper collar 6, that is, the proper tightening. maintained in condition. Therefore, for example, if a breakaway bolt is used as the tightening bolt 4 as in the illustrated embodiment, if the bolt is further tightened, the space between the upper head 4a and lower head 4b of the bolt will be broken, so it is difficult to tighten the bolt. It can be seen that this was done properly. That is,
In this state, the tooth-like projections are automatically pressed against the core wire at a predetermined pressure. In Figure 2, 9 is a spring washer, 10 is an insulating bolt cover, 11 is an insulating nut cover, 12
indicate coil springs.

According to this invention, during tightening work as described above,
Since the tightening is regulated by the stopper, there is no need for special tools such as a torque wrench, and proper tightening is performed with extremely simple and easy tightening work, and there is no human difference in tightening, and furthermore, Covered wires can be connected and branched using an insulated connector without being affected by differences in physical properties due to surrounding conditions of the insulated coating. Furthermore, since the stopper is provided on the outside of the tightening bolt and between the flat washer and the square nut, the stopper can be taken out simply by removing the square nut. Adjusting the height is also extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the insulated connector of this invention, and FIG. 2 is a cross-sectional view taken along the line - in FIG. 1. 1...Contact member, 2, 2'...Tooth-like projection, 3,
3'...Two parts of the insulating body, 3a, 3b...
Anti-slip piece, 4... Tightening bolt, 4a, 4b...
Upper and lower heads of breakaway bolt, 5...
...Square nut, 6...Stopper collar, 7...Flat washer, 8...Square washer, 9...Spring washer, 10...
...Insulating bolt cover, 11...Insulating nut cover, 12...Coil spring, W ₁ , W ₂ ... Insulated wire, C ₁ , C ₂ ... Insulation coating, I ₁ , I ₂ ... Core wire, O ₁ ,
O ₂ ...Electric wire center axis.

Claims (1)

[Scope of utility model registration request] 2 including the central axes of multiple insulated wires to be connected
The contact member is divided by a split surface and has a large number of tooth-like protrusions, each of which penetrates the insulation coating of the insulated wire and presses the tip to the core wire, and a piece part that covers the outside of these contact members to prevent mutual slippage. A two-split insulating body, a tightening bolt that clamps an electric wire between the contact members and tightens together with the insulating body, a square nut that engages with the tightening bolt and presses one side of the two-split insulating body, and a tightening bolt. and a flat washer that presses the other half of the two-split insulating body, the stopper being made of a material that is not easily compressed and deformed to restrict tightening when the tightening bolt is tightened. An insulating connector characterized in that it is provided outside the tightening bolt and between a flat washer and a square nut.