JP2550427Y2 - Insulator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator for supporting a trolley wire of a railway.

[0002]

2. Description of the Related Art A trolley wire of a railway is supported through insulators between a column and the trolley wire. For example, as shown in FIG. 3, two support mechanisms connecting a porcelain insulator 6 and a steel pipe 7 are attached to the column 5, and a trolley wire 8 is hung at the tip of the steel pipe 7. The two support mechanisms are structured so that the force for suspending the trolley wire 8 is increased. The ground wire 9 is attached to the body of the porcelain insulator 6 in a ring shape while leaving one or two shades of the porcelain insulator 6 on the side of the pole 5. Attention has been paid to prevent short-circuit currents from flowing to passengers at stations and the like. Recently, there has been a tendency to use a composite insulator 1 as shown in FIG. 4 for reasons such as light weight, low cost, and difficulty in breaking. The composite insulator 1 has a tension member 12 made of FRP at the center. A cap 13 made of a polymer material is attached to the tension member 12 by molding, bonding, or the like, and the terminal fitting 2 is fixed to both ends thereof by compression, bonding, or another method.

[0003]

[Problem to be Solved by the Invention] However, if a ground wire is attached to the composite insulator by the conventional method, the cap material of the composite insulator is a soft polymer material, and the cap material is worn by friction with the ground wire. And the composite insulator deteriorates electrically and mechanically.

[0004]

SUMMARY OF THE INVENTION The present invention provides an insulator which solves the above-mentioned problems, and comprises a tension member.
At both ends of the insulator, a cap made of a polymer material is connected to the tension member .
Extensible intermediate fitting of the conductive attaching the ground wire
The first member is provided so as to penetrate therethrough . As described above, the tension between
At the tension member site , a conductive intermediate attachment for attaching the ground wire is provided so that the tension member penetrates ,
When the ground wire is attached thereto, the ground wire does not come into contact with the cap made of a polymer material, so that deterioration of the insulator due to wear of the cap material can be prevented.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a side view of one embodiment of the composite insulator according to the present invention. In the composite insulator 3 of the present embodiment,
Metal terminals at both ends of FRP tension member 12
Attachment 2 is attached and ground wire is attached.
The metal intermediate fitting 4 to be installed is the tension member 12
Tensioning between the terminal fittings 2 so that the
It is provided in the 12 members. In addition, polymer materials
So that the cap 13 is covered with the tension member 12.
Molded and mounted. In this example, the intermediate attachment 4 is installed at an interval of about one sheet from the terminal attachment 2 to the shade 13. FIG. 2 is a diagram showing a state in which a trolley wire 8 is laid using the composite insulator 3 of the above embodiment. The intermediate fixture 4 is provided with a hole for bolting the terminal 10 of the ground wire 9 with a bolt so that the ground wire 9 can be easily attached. 5 is a support | pillar, 7 is a steel pipe. In addition, the material of the intermediate attachment is not limited to metal,
Any conductive material may be used.

[0006]

As described above, according to the present invention, in an insulator in which terminal fittings are attached to both ends and a cap made of a polymer material is connected, a conductive wire for attaching a ground wire between both terminal fittings is provided. Since the intermediate attachment is provided, there is an excellent effect that wear of the shade by the ground wire is prevented, and a reliable, lightweight and inexpensive insulator can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of a composite insulator according to the present invention.

FIG. 2 is a diagram showing a state in which a trolley wire is laid using the insulator of the embodiment.

FIG. 3 is a diagram showing a state where a trolley wire is laid using a conventional insulator.

FIG. 4 is a side view of a conventional composite insulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 3 Composite insulator 2 Terminal mounting tool 4 Intermediate mounting tool 5 Prop 6 Porcelain insulator 7 Steel pipe 8 Trolley wire 9 Earth wire 10 Terminal terminal 12 Tension member 13 Shade

Claims (1)

(57) [Scope of request for utility model registration] 1. A tension member ends terminal fitting is attached to the bevel said intensifier comprises a polymer material
In the insulator connected to the tension member , the tension member penetrates a conductive intermediate attachment for attaching a ground wire to a tension member portion between the two terminal attachments.
An insulator characterized by being provided as follows.