JPS61250983A - Cable connection - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Branch Line Field of the Invention] The present invention relates to a cable connection part, and particularly to a cable connection part that has a small outer diameter and weight and has good water-shielding properties.

[Technical Aspects of the Invention 1] Conventionally, cable connections such as large-sized Cv cables have been configured as shown in FIG. 6 in order to maintain good characteristics.

That is, in the same figure, an internal semiconducting layer 3 is provided on the conductor connection part 2 of the water-shielded Cv cable 1.1 which has been stripped in stages and conductor connections are made, and an insulating tube is wound or By press-fitting the insulating rubber/plastic composition into the entire mold,
Spindle-shaped molded insulator 4 and outer semiconducting layer (not shown)
A shielding layer 5 and a water shielding layer 6 made of lead foil are sequentially formed on top of the shielding layer 5 and a water shielding layer 6 made of lead foil, a metal junction box 7 is fitted from the outside and a waterproof compound 8 is filled inside, and the connection Cable sheath 9. of each cable 1.1 over box 7.
The end portion of 9 is covered with an anticorrosion tape layer 10 made of adhesive vinyl tape or the like, so that the entire body is formed into a spindle shape.

[Problems in the Background Art] However, such conventional cable connections have problems such as the outer diameter and weight of the connection part are large, the space factor is poor, the handling is inconvenient, and the economical efficiency is also poor. there were.

[Object of the invention] The present invention has been made in response to these circumstances, and
It is an object of the present invention to provide a cable connection part that has a small outer diameter and overlap, has good electrical properties and mechanical properties, and is also economically efficient.

[Summary of the Invention] That is, the present invention forms a launching layer that covers the outer periphery of the molded connection part from the protective covering end of the cable at the molded connection part of a rubber/plastic insulated cable, and further includes glass fiber on the outer periphery. This cable connection part is constructed by forming a protective layer made of reinforced resin, has a small outer diameter and weight, has good electrical properties and mechanical properties, and is also economical.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a longitudinal sectional view schematically showing an embodiment in which the present invention is applied to a normal connection part. In the following drawings of the embodiment, parts common to those in FIG. 6 are denoted by the same reference numerals, and redundant explanation will be omitted.

In FIG. 1, 4 indicates a molded insulator of a water-shielding C■ cable 1.1 having an external semiconductive layer (not shown) on the outer periphery, which is formed by a known method such as injection molding or tape wrapping molding. ing.

11 is a first water-shielding layer formed on the molded insulator 4 and connected to the ends of each water-shielding layer of the water-shielding Cv cable 1.1;
12 is waterproof C ■ Cable sheath of cable 1.1 9.9
This is a second water-blocking layer formed from the cylindrical portion of the mold insulator 4 to the cylindrical portion of the mold insulator 4.

As shown in FIG. 2, these first and second water-blocking layers 11 and 12 are formed by wrapping lead foil coated with epoxy resin over the molded insulator 4 with the epoxy resin side inside. Wrap the part and solder the edge a,
As shown in Figure 3, lead foil coated with epoxy resin is
It is formed by wrapping it around the molded insulator 4 with the epoxy resin side inside, overlapping its edges, and soldering the edges.

13 is a protective layer made of glass fiber reinforced resin, for example, glass fiber impregnated with epoxy resin is coated with water-shielding C
It is formed by winding and curing the water-blocking layer 11.12 spanning the cable sheath 9.9 of the cable 1.1. 1
4 is an anti-corrosion protective layer made of adhesive vinyl tape wrapped around the outermost layer.

FIG. 4 is a partial vertical sectional view schematically showing another embodiment in which the present invention is applied to an insulated connection part.

In FIG. 4, 4a indicates the main mold insulator of the water-shielding Cv cable 1.1 formed by a known method such as injection molding or tape wrapping mold, and 4b indicates the edge-cut mold insulator. There are water-shielding CVs on top of 4a and in the edge-cut mold insulator 4b, respectively.
An electrically connected edge-cut shielding layer 5a, 5b is embedded in the 11th layer of the cable 1.1.

However, in this embodiment, a first
A water passage JIi 11a is formed, and a second water shielding layer 11a is formed on the first water shielding layer 11a from the end of the cable sheath 9 on the same side. 12a is formed, and an edge cutting mold insulator 4 is formed thereon.
A protective layer 13a made of glass fiber reinforced epoxy resin is formed up to the same height as a.

Further, a first water shielding layer 11b is formed from the other water supply Cv cable 1 to the edge cut mold insulator 4a and the protective layer 13a on the extension thereof, and a first water shielding layer 11b is formed from the end of the cable sheath 9 on the same side. A second water-blocking layer 12b is formed over the rising portion of the water layer 11b toward the edge-cutting mold insulator 4a.

In addition, although 15 is a valley filling part formed, for example with a self-fusion tape, this can also be omitted as shown by the dotted line.

13b is the first water-blocking layer 11b and the second water-permeable layer 12b
A protective layer of glass fiber reinforced epoxy resin that covers the

FIG. 5 is a partial sectional view showing essential parts of still another embodiment of the present invention.

In this embodiment, a reinforcing insulating layer 16 is formed by molding on the first water-shielding layer 11 over the cable sheath 9.9 of the water-shielding CV cable 1.1, and on this reinforcing insulating layer 16, a second
A water-blocking layer 12 is formed. In this embodiment, water penetrating along the cable sheath 9 and the protective layer 13 is blocked by this mold reinforcing insulation layer 16.

[Effects of the Invention] As explained above, the cable connection part of the present invention has a cylindrical shape with approximately the same diameter as the cable outer diameter, and uses a metal connection box, so it is small, lightweight, and has good electrical properties and mechanical properties. It has characteristics and is economical.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are longitudinal sectional views showing the formation process, and FIGS. 4 and 5 are respectively other embodiments of the present invention. A cross-sectional view showing an example,
FIG. 6 is a partial vertical sectional view showing a conventional cable connection section. 1...Waterproof CV cable 4...
・・・・・・・・・Mold insulator 5・・・・・・・・・
... Shielding layer 11 ...... First water permeable layer 12 ...
......Second impermeable layer 13...
...Protective layer 5th prisoner

Claims (2)

[Claims] (1) A water-blocking layer is formed on the molded insulator of the rubber/plastic insulated cable, covering the outer periphery of the molded connection part from the protective covering end of the cable, and further a protective layer made of glass fiber reinforced resin is formed on the outer periphery. A cable connection part characterized by forming a. (2) The cable connection portion according to claim 1, wherein the water-blocking layer is formed of lead foil.