JPS6120830Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electric wire gripping part used for attaching a spacer to an electric wire, for example.

The electric wire gripping section generally has a structure in which the electric wire is held between a pair of gripping bodies and the electric wire is gripped by tightening both gripping bodies with a bolt or the like. In the case of a spacer grip, a spacer or a connecting portion is attached to one end of the grip or is formed integrally with the grip to maintain the distance between the wires.

Spacers such as those described above are used not only for overhead transmission and distribution lines, but also for on-premises wiring at substations, etc., to maintain the spacing.
Especially when jumper wires are short and formed into a wide variety of shapes, the wires often do not extend linearly but are curved.

A conventional electric wire gripping part such as a spacer is equipped with a pair of gripping bodies as described above, but the wire receiving groove provided in the gripping body has a semi-cylindrical surface, and the electric wire is held between the gripping bodies. At this time, this semi-cylindrical part comes into contact with the outer peripheral surface of the electric wire. Therefore, the outer end of this semi-cylindrical groove has a small radius so as not to damage the wire.
However, most of the surfaces are linear in the direction of wire extension.

In this way, when a gripping part with a linear groove is used for a jumper wire with a curved shape such as in a substation, the receiving groove wall of the gripping part comes into local contact with the surface of the wire, causing damage to the wire. There was a flaw that hurt me.

This idea was made in view of the above points, and the purpose is to provide a wire gripping part that causes less damage to the wire, and is characterized by making the shape of the wire receiving groove wall of the gripping part a convex curved surface. It is said that

This invention will be specifically explained with reference to the embodiments illustrated below. As shown in the figure, the wire gripping part (generally referred to as a clamp) consists of a clamp body 1 and a wire holding body 2, and both the clamp body 1 and the wire holding body 2 have wire receiving grooves 3 and 4 at one end. ,
Receive electric wires (not shown in Figures 1 and 2) into the receiving grooves 3 and 4, tighten the wire restrainer 2 to the clamp body 1 with the bolt 5, and then attach the electric wires received in the receiving grooves to the clamp body. A common configuration is to hold it between a holding body and a holding body. Figures 1 and 2 show a spacer in which the wire gripping part and the connecting body described above are integrally formed, and the clamp body has a connecting part 1b as a spacer in the center, holding parts 1a at both ends, and a clamp body. The body 2 has wire receiving grooves 3 and 4, respectively. In the case shown in FIGS. 1 and 2, a nut 6 which is screwed onto a bolt 5 is embedded in the restraining body 2 and is integrated therewith. As mentioned above, in the conventional wire gripping section, the wire to be gripped extends almost linearly (not shown), so the wire receiving groove 3,
The wall of No. 4 had a semi-cylindrical surface as shown by dashed-dotted lines 8 and 9.

However, as mentioned earlier, wire gripping parts such as spacers used to maintain the distance between curved wires in narrow substation and distribution station premises have wire receiving grooves with semi-cylindrical surfaces (chamfered or rounded ends). Even if it is attached)
Since it was straight, there was a risk of damaging the electric wire.

This invention is characterized in that the walls of the wire receiving grooves 3 and 4 are formed into convex curved surfaces, for example, rotationally quadratic curved surfaces, as shown by solid lines in FIGS. 1 and 2. Therefore, the wire gripping part of this invention is the same as the conventional wire gripping part except for the shape of the wire receiving groove, and therefore, although not shown, it can adopt many different structures that have been proposed in the past. be.

In this way, the wire receiving groove wall has a smooth convex curved surface, so when it is used for a curved wire section such as a short and extremely curved jumper wire in a substation, it can be used as shown in Figure 3. As shown, the wire receiving groove follows the bending of the wire W in all directions well,
Since no unreasonable force is applied to the wire, it has the effect of preventing accidents such as damage to the wire.

[Brief explanation of the drawing]

FIG. 1 is a plan view with the wire receiving groove of the clamp body of a spacer having an embodiment of the wire gripping portion of this invention partially omitted, and FIG. 2 is a plan view of the spacer shown in FIG. The front view and FIG. 3 are cross-sectional views taken along a plane including the wire extension direction. 1...Clamp body, 1a...Wire gripping part, 1
b... Connection part, 2... Holder, 3, 4... Wire receiving groove, 5... Bolt, 6... Nut, 8, 9...
A dashed-dotted line showing the bottom of a conventional electric wire groove.

Claims (1)

[Scope of utility model registration request] In the wire gripping part that grips the wire by sandwiching it between a pair of gripping bodies having a wire receiving groove having a semicircular cross section perpendicular to the direction of extension of the wire, the wire receiving groove wall has a convex curved surface. Electric wire grip part.