JPH0347398Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a collar for a gripping portion for holding, connecting, or clamping an electric wire having a non-circular cross section.

(Prior Art) Electric wires originally have a circular cross section. However, it has recently been discovered that the cause of wind noise and wind pressure vibration is that the cross-sectional shape of the electric wire is circular. In other words, it has been found that vibration is generated by the separation of air fluid flowing around the outer circumference of a circular wire, and is the source of wind noise and wire vibration.In order to reduce noise and vibration, the wire's outer shape should be I found out that it's better if it's not circular.

As a gripping structure for such a non-circular electric wire, (1)
(2) method using two-part collar (Japanese Patent Application Laid-Open No. 1982-82010), and
(3) Methods such as wrapping an elastic material such as rubber are known.

Method (1) has the disadvantage of poor workability and high cost. Since the method (2) is composed of two parts, it has the inconvenience that a two-part collar for one type of electric wire cannot be applied to other types of electric wires. There was also a risk that parts would fall during work. Method (3) was not preferred because it caused the problem of rubber deterioration when used for a long time.

(Problems to be solved by the invention) In view of the problems of the conventional technology, it is lightweight and easy to manufacture.
Furthermore, the present invention aims to provide a gripping collar that is excellent in terms of workability.

Another object of the present invention is to provide a gripping collar that is flexible, easily adapts to the outer shape of electric wires having protrusions, and can be applied to different types of electric wires.

(Solution by invention) U-shaped grooves with a constant pitch are arranged in parallel in the width direction of a gripping collar that has a single or multiple protrusions and is wrapped around a gripping portion of an electric wire that has a circular cross section except for the protrusions. Further, a protrusion groove into which the protrusion of the electric wire fits was obliquely provided on the side where the U-shaped groove was provided. After wrapping this gripping collar around the gripping portion, the gripping member is tightened.

(Example) Before explaining the present invention, a gripping structure for a non-circular electric wire, which was previously filed by the applicant (Utility Application No. 1983-90850), will be explained with reference to FIG.

This is an electric wire 1 having a single or multiple protrusions 2.
The protrusion 2 is placed on the outer peripheral surface of the part excluding the protrusion 2.
An armor rod 3 having a diameter d larger than a height h of the armor rod 3 is wound around the armor rod 3, and a gripping member 4 is attached onto the armor rod 3 to clamp it.

Now, the present invention can be said to be an improvement on the above-mentioned invention, and when the electric wire 1 having the protruding part 2 is gripped by the gripping member 4, a gripping rod that is wound around the gripping part is used instead of an armor rod which has problems in terms of workability. It is characterized by its color.

The explanation will be given below based on FIGS. 1 and 2. 5 is a rectangular, thin metal gripping collar (hereinafter referred to as collar). Reference numeral 6 denotes U-shaped grooves arranged in parallel at a constant pitch in the width direction of the collar 5. Reference numeral 7 denotes a protrusion groove provided diagonally in the center of the collar 5 on the side where the U-shaped groove 6 is provided, into which the electric wire protrusion 2 (see FIG. 3) is inserted. The depth d ₁ of the groove 7 is smaller than the depth d of the U-shaped groove 6 .

Note that when the protrusions 2 are provided in double rows in the above configuration, the protrusion grooves 7 are also provided in double rows correspondingly.

(Effect) With this configuration, when the collar 5 is wrapped around the gripping part of the electric wire having the protruding part 2, it is deformed at the U-shaped groove 6 as shown in FIG. 3, and the gripping collar 5 becomes circular. It is wrapped in a polygon shape close to . color 5
If the gripping member 4 is attached with the gripping member 4 wrapped around the gripping member 4, there will be no gap between the gripping member 4 and the gripping member 4, and the gripping member will be firmly gripped.

In addition, in the past, only a collar processed to match the diameter of the wire and the protrusion could be used, but according to the collar of the present invention, the size of the collar and the protrusion groove 7 can be used.
The same collar material can be used on different wires by simply changing the angle of the collar.

The collar is flexible and easily conforms to the outer shape of the wire, further improving ease of installation.

The collar can be produced in large quantities by extrusion molding with a U-shaped groove provided, which is advantageous in manufacturing.

Further, since the collar has a small thickness t and is provided with a U-shaped groove, it has the advantage of being lightweight and extremely easy to handle.

[Brief explanation of the drawing]

FIG. 1 is a front view of the gripping collar of the present invention. Second
The figure is also a side view. FIG. 3 shows the structure of the gripping part around which the gripping collar is wrapped. Figure 4 shows the structure of the gripping part of the existing application. In the figure: 1...Electric wire, 2...Protrusion, 3...
... Armor rod, 4... Gripping member, 5... Gripping collar, 6... U-shaped groove, 7... Groove for protrusion.

Claims (1)

[Scope of utility model registration request] A gripping collar that has a single or plural protrusions and is wrapped around a gripping portion of an electric wire having a circular cross section except for the protrusions, and the gripping collar has U-shaped grooves 6 with a constant pitch in the width direction. A collar for gripping a non-circular electric wire, characterized in that a protrusion groove 7 into which the protrusion of the electric wire fits is diagonally provided on the side where the U-shaped groove 6 is provided.