JPS627644B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The insulating support of the present invention is attached to the outer periphery of a center conductor of a gas-insulated high-voltage electric wire or other cable.

(Prior Art) Conventionally, there has been no suitable insulating support of this type. The only cables available are those shown in Figures 3 and 4 for communication cables. Among these, the one shown in FIG. 3 has an opening B formed in a dish-shaped base material A, and the one shown in FIG. 4 has an opening D formed in a disc-shaped base material C.

(Problems with the prior art) The conventional one shown in the figure simply has an opening formed in a disc-shaped or dish-shaped base material, so the thickness of the opening is only the thickness of the base material. When placed over the center conductor, there was a problem that it lacked stability and was prone to tilting or coming off the center conductor.

(Means for Solving the Problems) An object of the present invention is to provide an insulating support that is easy to cover a center conductor, is stable when covered, and does not come off easily from the center conductor.

As shown in FIG. 1, the insulating support 1 of the present invention has a fitting part 5 which is fitted over the outer periphery of the center conductor 4 and projects in the longitudinal direction of the center conductor 4 into the push-in recess 3 formed in the base material 2. The guide edges 6 on both sides of the push-in recess 3 are formed to protrude below the fitted portion 5, and the inner surface 7 of the guide edges 6 is formed to bulge inward.

(Function of the Invention) In order to cover the center conductor 4 with the insulating support 1 of the present invention during the manufacturing process, for example, as shown in FIG. 2, the manufactured center conductor 4 is washed with a washing machine 8,
After that, the insulating supports 1 are arranged from the insulating support mounting device 9 to the center conductor 4 at appropriate intervals, and the supports 1
The fitted portion 5 is placed over the outer periphery of the center conductor 4.

After that, a metal band-shaped sheath material 10 made of aluminum, copper, stainless steel, etc. is vertically attached to the outer periphery of the insulating support 1.
It is gradually bent into a tubular shape by a forming roller 11 to cover the outer periphery of the insulating support 1, and then the seams of the sheath material 10 are welded by a welding machine 12, and the welded parts are inspected by a welding inspection device 13. Then, it is straightened by a straightening device 14 consisting of several rollers,
Thereafter, a sheath 16 is formed by corrugating with a corrugator 15, and the sheath 16 is wound onto a winding drum 17.

(Example) The base material 2 of the insulating support of the present invention is preferably formed of plastic such as polyethylene or epoxy resin.

The fitted portion 5 may be molded from plastic, but
Metal is preferable in terms of insulation.

When the base material 2 and the fitting part 5 are made of plastic, they may be integrally molded, or they may be molded separately and combined.

In addition, 18 in C of FIG. 1 is a twisted wire conductor constituting the center conductor 4, 19 is a corrugated metal tube constituting the center conductor 4, and 20 is a corrugated sheath provided on the outer periphery of the insulating support 1.

(Effect of the invention) The insulating support of the present invention has the following effects.

(1) The fitted part 5 is formed in the push-in recess 3 of the base material 2, and is formed to protrude in the longitudinal direction of the center conductor 4, so it is very stable when placed over the center conductor 4. The insulating support 1 that has been carefully covered will not tilt, fall down, or come off.

(2) Since the guide edges 6 on both sides of the push-in recess 3 protrude below the fitted portion 5, it is easy to cover the center conductor 4.

(3) Since the inner surface 7 of the guide edge 6 of the base material 2 is formed to bulge inward, the insulating support 1 attached to the center conductor 4 will not come off inadvertently, making it even more stable.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the insulating support of the present invention, in which A is a front view, B is a sectional view taken along line A-A of A, and FIG.
C is a partially longitudinal front view of a state in which the outer periphery of the insulating support placed over the center conductor is covered with a sheath, FIG. 2 is an explanatory view of covering the center conductor with the insulating support of the present invention,
FIG. 4 is an explanatory diagram of a conventional example. 1 is an insulating support, 2 is a base material, 3 is a push-in recess, 5
6 is the fitted part, 6 is the guide edge, and 7 is the inner surface of the guide edge.

Claims (1)

[Claims] 1 A fitted part 5 that covers the outer periphery of the center conductor 4 is formed in the push-in recess 3 formed in the base material 2 so as to protrude in the longitudinal direction of the center conductor 4, and the guide edges 6 on both sides of the push-in recess 3 are covered. An insulating support for an electric wire, characterized in that it is formed to protrude downward from a fitting part 5, and an inner surface 7 of a guide edge 6 is formed to bulge inward.