JP2013086628A - Section insulator for electric train line and waterproof cover for insulating member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a section insulator for an electric train line capable of preventing raindrops from being attached upon raining and reducing degradation of electric insulating performance.SOLUTION: In the section insulator 1, the insulating member 2 configured with a rod-like square timber made of FRP holds adjacent ends of two adjacent trolley wires T1 and T2 while electrically insulating them. A pair of flat fall-inducing slopes 7c, 7c inclining downward from a top of a widthwise center to both sides 7b, 7b are formed on an upper part of the insulating member 2. Raindrops falling on the fall-inducing slopes 7c, 7c of the insulating member 2 fall down along the fall-inducing slopes 7c and hardly stay on the insulating member 2 as a mass of water drops. Therefore, leakage current caused by water drops on the insulating member 2 is reduced, and the insulating performance is prevented from degrading.

Description

  The present invention relates to a section insulator that connects and connects two different electric sections adjacent to each other in a trolley wire for a train track while being electrically insulated from each other.

  Conventionally, as a section insulator for a train track, for example, one described in Patent Document 1 is known. This is to connect two trolley wires with different electrical systems while being electrically insulated and connected to each other, and a bar-like shape passed between the trolley wires in order to slide the pantograph of the train continuously. And the trolley wire fittings fixed to both ends of the insulating member.

Japanese Laid-Open Patent Publication No. 2004-299450

In the conventional section insulator, since the insulating member is a rod-shaped body made of FRP and having a rectangular cross section, raindrops are likely to settle on the top surface, leakage current increases during rain, and the insulation performance deteriorates, preventing safe work. There is a fear. It would be advantageous if, after solving this problem, it would be possible to continue using the existing section insulator by attaching the necessary members.
Accordingly, an object of the present invention is to provide a section insulator and an insulating cover that suppress the adhesion of raindrops during rainfall and reduce the deterioration of electrical insulation performance.

In order to solve the above-mentioned problem, in the present invention, an insulating member 2 that holds the opposite ends of two trolley wires T1 and T2 installed adjacent to each other in the extending direction of the train line while electrically insulating them, In the section insulator 1 for a train line, which is provided between the adjacent ends of the trolley line, the sliders 4 and 5 are provided in the direction of extension for continuously sliding the pantograph instead of the trolley line. On the upper part, a drop-off guide slope 7c that descends to the side and promotes the fall of raindrops is provided.
A drop-inducing slope 10c that descends toward the side and promotes the fall of raindrops was provided on the insulating cover 10 that is mounted so as to cover the upper surface of the insulating member 9 in the section insulator.
The drop-inducing slopes 7c and 10c are provided with an arcuate curved surface that extends gently without any corners.

  In the present invention, even if raindrops fall on the upper surface of the insulating member, the inclined surface is slid down, so that the stagnation of waterdrops can be reduced, and the deterioration of the electrical insulation of the insulating member can be suppressed. In addition, if an insulating cover is attached to the insulating member, the above-mentioned effect can be imparted to the existing section insulator and the use can be continued as it is.

It is a perspective view of a section insulator concerning the present invention. It is a front view of the section insulator of FIG. It is a top view of the section insulator of FIG. It is a bottom view of the section insulator of FIG. It is a side view of the section insulator of FIG. (A) is a front view of an insulating member, (B) is a bottom view of the insulating member, (C) is a central longitudinal sectional view of the insulating member, and (D) is a central longitudinal sectional view of the insulating member according to another embodiment. is there. It is a fragmentary perspective view of the insulating cover which concerns on this invention. It is a longitudinal cross-sectional view of the insulating cover of FIG.

Embodiments of the present invention will be described with reference to the drawings.
1 to 5, a section insulator 1 is insulated while electrically insulating between adjacent end portions of two trolley wires T1 and T2 installed adjacent to each other in the extending direction of a train track. The pantograph is slid without being interrupted by the sliders 4 and 5 along the trolley wires T1 and T2, and is fastened by the connection fitting 3 fixed to both ends of the member 2.

The insulating member 2 is composed of a rod-shaped square member made of FRP. In the insulating member 2, as shown in FIGS. 6A to 6C, the attachment portions 6 at both ends for attaching the connection fitting 3 have a rectangular cross section, and the intermediate portion 7 has a substantially mountain shape in cross section. The intermediate portion 7 of the insulating member 2 includes a flat bottom surface 7a that is recessed from the bottom surface of the mounting portion 6, a side surface 7b that rises vertically from both sides of the bottom surface 7a, and a top portion at the center in the width direction toward both side surfaces 7b and 7b. It consists of a pair of flat drop-inducing slopes 7c, 7c that incline downward. The raindrops that fall on the drop-inducing slopes 7c and 7c of the insulating member 2 are transmitted downward along the slope 7c and do not easily remain on the insulating member 2 as water droplets. The insulating member 2 is subjected to a surface treatment with a silicon varnish having weather resistance, electrical insulation and water repellency.
Note that the drop-inducing slope 7c of the insulating member 2 may be formed so as to be curved in a circular arc shape from the side surface 7b as shown in FIG. 6D, and in this case also, the drop of raindrops is promoted. Perform the action.

  The connection fitting 3 receives the both ends of the insulating member 2 between the holding portions 3a for holding the ends of the trolley wires T1 and T2 and bolts them, and also supports the long slider 4 and the short slider 5 by bolting them. And a bifurcated coupling part 3b. The trolley wires T <b> 1 and T <b> 2 are coupled to the retaining portion 3 a of the connection fitting 3 by the push bolt 8. The retaining portion 3a of the connection fitting 3 is inserted through the ends curved upward of the trolley wires T1 and T2, and the push bolt 8 is screwed in the substantially orthogonal direction from the outside so that the trolley wire T1 (T2) is laterally moved. Press.

  A long slider 4 that slides in contact with the pantograph in place of the trolley wire T1 (T2) is provided on one side of the connection fitting 3, and a short slider 5 that is also in sliding contact with the pantograph on the other side along the insulating member 2. The connection fittings 3 and 3 are fixed alternately on the left and right. The long slider 4 fixed to one connection fitting 3 extends while bending so as to avoid the short slider 5 fixed to the other connection fitting 3, and becomes substantially flush with the lower surface of the trolley wire T1 (T2). It has a lower end surface, and the tip is bent upward while curving sideways in order to alleviate the collision with the pantograph. The short slider 5 is linear, has a lower end surface that is substantially flush with the lower surface of the trolley wire T1 (T2), and is tapered so that the tip end converges upward to alleviate the collision with the pantograph. Is formed.

  An insulating member 9 of an insulator according to another embodiment is shown in FIGS. The insulating member 9 has a rectangular bar shape as in the prior art. An insulating cover 10 having a mountain-shaped cross section is mounted on an intermediate portion of the insulating member 9 except for both ends of the insulating member 9 to which the connection fitting 3 is attached. The insulating cover 10 includes a concave portion 10a opened downward so as to be fitted from above over the entire length of the intermediate portion of the insulating member 9, side surfaces 10b rising vertically from both sides of the peripheral edge of the opening of the concave portion 10a, and a top portion in the center in the width direction. It is composed of a pair of flat drop-off guide slopes 10c, 10c that incline downward toward both side faces 7b, 7b. The insulating cover 10 is attached to the existing insulating member 9, and raindrops travel along the drop-inducing slope 14 c and do not easily stay on the insulating member 2 as a water droplet lump.

DESCRIPTION OF SYMBOLS 1 Section insulator 2 Insulation member 3 Connection metal fitting 3a Retaining part 3b Coupling part 4 Long slider 5 Short slider 7c Drop-off guide slope 9 Insulation member 10 Insulation cover 10a Recess 10c Drop-off guide slope T1 Trolley wire T2 Trolley wire

Claims (3)

An insulating member that is electrically insulated from the opposite ends of two trolley wires installed adjacent to each other in the direction of extension of the train line, and a direction of extension that continuously slides the pantograph in place of the trolley wire In a section insulator for a train track that is provided between adjacent ends of a trolley wire,
A section insulator for a railway track, characterized in that a drop-off guide slope is provided on an upper portion of the insulating member and descends laterally to allow raindrops to be transmitted. An insulating member that is electrically insulated from the opposite ends of two trolley wires installed adjacent to each other in the direction of extension of the train line, and a direction of extension that continuously slides the pantograph in place of the trolley wire And is mounted so as to cover the upper surface of the insulating member in the section insulator for the train line interposed between the adjacent ends of the trolley wire,
An insulating cover for a section insulator, characterized in that it comprises a drop-inducing slope that descends to the side and promotes the fall of raindrops.   3. A section insulator for a railroad track or an insulating cover, characterized in that an arcuate curved surface extending gently on a side surface extends on the drop-inducing slope according to claim 1 or 2.

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