JP4052540B2 - Insulated arm for train tracks - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In an AC electrification section, the present invention relates to an insulating brace that supports a train line such as an AT feeder line on a structure.
[0002]
[Prior art]
The electric current of the train line flows from the substation to the trolley line through the feeder. The train collects electricity from the trolley wire and travels by the rotation of the drive motor. After that, electricity flows from the wheels to the rails and returns to the substation by return.
The circuit configuration in the AC electrification section of the so-called AT feeding system using an auto transformer is also based on the above flow. As typical train lines, there are AT wire (common name; AF) and AT protection line (common name: PW), both of which are attached along the trolley line and supported by a structure provided at an appropriate interval.
FIG. 4 shows a conventional example of such a train line support structure. The trolley line T is gripped by the tip end of the curved metal fitting 11 attached to the lower horizontal member of the movable bracket K, and the suspension line M for hanging the trolley line is supported on the upper horizontal member of the movable bracket K. . The AT feeder line (AF) and the AT protection line (PW) are supported by a support device provided above the movable bracket. In this support device, one end of a brace 12 is fixed to a utility pole P with a utility pole band 13, a plurality of suspension insulators 14 are connected to the tip and suspended, and an AT wire (AF) is clipped at its lowermost end. Support with. An electric pole band 15 for a reinforcing member is attached to the upper electric pole of the arm metal, and an AT protection line (PW) is suspended by a hanging metal fitting fixed to the outer surface thereof.
[0003]
[Problems to be solved by the invention]
Since the train line uses a high voltage (AC 20 to 25 KV), a sufficient insulation separation from the support structure is required. Also in the AT feeder, three to four hanging insulators 14 are suspended from the arm metal 12 and supported at the lower end thereof. Accordingly, the support structure needs to have a height for obtaining a sufficient insulation separation and a strength for supporting the weight of the insulating metal fitting, and is extremely large. This is not suitable for the surrounding environment and may damage the landscape. In addition, since the supporting members are heavy and the assembling work at a high place at night is dangerous, a lot of time is spent on the construction.
It is an object of the present invention to provide an insulating armrest for a train line that has a simple structure, can secure sufficient insulation separation and strength, is easy to mount, and can downsize a support structure such as a utility pole.
[0004]
[Means for Solving the Problems]
In the insulated armature for a railway track according to the present invention, a support fitting that can be locked to a support structure is connected to one end of an insulator, and an L-shaped suspension fitting is connected to the other end, and each of them is coaxially configured. A suspension clamp is provided in which the connection fitting and the wire gripping clip are rotatably connected, and the end of the connection fitting and the tip of the L-shaped suspension bracket are connected in a direction orthogonal to the rotation direction of the wire holding clip. It is pivotably connected and suspended, and the AT wire is supported by the wire gripping clip.
In the above-described insulating arm brace, for example, a support fitting is fixed to one arc piece of an electric pole band composed of a pair of opposed arc pieces, and a hanging fitting that can hang an AT protection wire is provided outside the other arc piece. Make it attachable to.
In addition, a lightweight and highly durable polymer insulator is used for the insulator.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention. The insulator 1 is provided with connection flanges 1a and 1b at both ends. The support metal fitting 2 has connection flanges 2a and 2b at both ends,
One is bolted integrally with the connection flange 1a, and is attached to the support structure S by the other connection flange 2b. The L-shaped hanging metal fitting 3 is provided with a connection flange 3a at one end, and is connected to the bolt by being coaxial with the other end flange 1b of the insulator and having the tip downward. The suspension clamp 6 is composed of a connecting metal fitting 6a having bolt holes drilled in an orthogonal direction at upper and lower ends and a lower wire gripping clip 6b, each of which is bolted so as to be rotatable around a bolt shaft. At 6a, the AT feeder is gripped, and one end bolt hole of the connecting metal fitting is pivotally connected to the tip bolt hole of the L-shaped hanging metal fitting 3 to be suspended. Even if the electric wire swings due to wind or the like, the movement is freely allowed by the connection of the suspension clamp, so that the electric wire is not damaged at the support point.
[0006]
FIG. 2 shows a case where an insulating arm metal is attached to a utility pole. The utility pole band 4 is composed of a pair of opposed arc pieces 4a and 4b. The end of the support fitting is fixed to one arc piece 4a, and a support rod 5 is projected in the horizontal direction outside the other arc piece 4b. The tip 5 is provided with a hanging ear 5a and is attached by holding the utility pole P of the support structure. A suspension clamp that is substantially the same type as that suspended from the L-shaped suspension fitting is suspended from the suspension ear so as to be rotatable, and the AT protection line is held by the lower end clip and suspended.
[0007]
FIG. 3 shows a case where the apparatus of the present invention is used by being erected on a horizontal support structure S. At both ends of the insulator 1, the support metal fitting 2 and the L-shaped hanging metal fitting are integrally connected with each flange, and the support metal fitting 2 is placed on the support structure S and fixed. A suspension clamp 6 is pivotably suspended from the tip end ear 3b of the L-shaped suspension fitting, and the AT wire (AF) is gripped and suspended by the wire gripping clip 6a at the lower end.
[0008]
The insulator is generally made of porcelain, but a polymer insulator (composite insulator) may be used for this. Since polymer insulators are resistant to fouling, insulation can be maintained. In addition, since it is lightweight and has high strength, it can be miniaturized and simplified. As a result, the support structure is low and has a simple structure, and the cost of the entire equipment is greatly reduced.
The armor device of the present invention is assembled at the factory, and only installation work to the support structure is required on site, so that workability and maintainability in high-altitude work are ensured.
The above has been described by taking an example in the case of the AC electrification section, but it is obvious that the present invention is not limited to this and can also be used in the DC electrification section.
[0009]
【The invention's effect】
A support bracket that can be locked to the support structure is coaxially coupled to one end of the insulator, and an L-shaped suspension bracket is coupled to the other end to integrally form an insulating arm bracket. Since the suspension clamp is suspended and the AT feeder is gripped, a simple structure can be obtained and sufficient insulation and high strength can be ensured. Since it is only necessary to attach bolts to the support structure on site, safety can be ensured and work efficiency can be ensured during high-altitude work and night work.
In addition, since conventional suspension insulators are not used, even if the support position of the train line is the same, the insulation arm brace can be installed at a low position, and it can be applied to slim support structures that do not require high strength and low height. it can. Therefore, the cost of the entire facility can be greatly reduced.
By using a lightweight, highly durable and insulating polymer insulator for the insulator, it is possible to reduce the weight and extend the life, and further develop the above-mentioned maintainability, workability and cost reduction of the support structure. be able to.
[Brief description of the drawings]
FIG. 1 is a front view of an insulating armrest for a train track according to the present invention.
FIG. 2 is a front view showing another embodiment of an insulating armrest for a train track.
FIG. 3 is a front view showing another embodiment of an insulating armrest for a train track.
FIG. 4 is a front view of a conventional insulating armrest.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Insulator 1a, 1b Flange 2 Support metal fitting 3 L-shaped suspension metal fitting 3a Flange 4 Electric pole band 4a, 4b Arc piece 5 Support rod 5a Suspension ear 6 Suspension clamp 6a Electric wire gripping clip 6b Connecting metal fitting 11 Curve drawing metal fitting 12 Bracket 13 Telephone pole band 14 Suspension insulator 15 Telephone pole band AF AT feeder PW AT protection line

Claims (3)

A suspension clamp in which one end of an insulator is fixed to a support structure that can be locked to a support structure, and an L-shaped suspension bracket is integrally connected to the other end in a coaxial manner so that the connection bracket and the electric wire gripping clip are rotatably connected. Is attached to the tip of the L-shaped suspension bracket so as to be pivotable in a direction perpendicular to the direction of rotation of the wire gripping clip so that the AT wire can be gripped by the wire gripping clip. Insulated arm for train tracks. The support bracket is fixed to a utility pole band for fixing around the utility pole, and a suspension bracket capable of suspending the AT protection wire is provided on the opposite side of the support bracket in the utility pole band so that it can be attached to the utility pole. The insulated armrest for a train line according to claim 1, wherein The said armature is comprised with a polymer insulator, The insulated armrest for train tracks of Claim 1 or Claim 2 characterized by the above-mentioned.

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