JPH0143307Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to the improvement of a rigid electric train track for supplying power to running vehicles such as subways and monorails.

As shown in Figure 1, this type of conventional rigid electric train line consists of an aluminum rigid body with a T-shaped cross section and a unit length of about 10 m.
A rigid body 10 having a unit length of 100 m to 200 m is formed by welding and connecting in the longitudinal direction at the installation site, and long copper contact wires 12, 12 are attached to the dovetail-shaped protrusion 11 formed on the lower end surface of the rigid body 10. Locking groove 1 formed on the upper end of
2a, and the claw portion 1 of a plurality of relatively short aluminum ears 13 is engaged with the other locking groove 12b.
3a, and tighten the ear 13 to the rigid body 10 via the bolt 14 and nut 15, and then tighten the contact wire 1.
2 and 12, and the rigid body 10 is attached as shown in FIG.
The electrical connection between the contact wires 12 and 12 is made by connecting fittings 16, 12 at both ends of the long rigid body 10 which is welded.
It was carried out by 16. In such a conventional rigid overhead contact line, in order to prevent electrolytic corrosion occurring between the aluminum rigid body 10 and the copper contact wire 12 and between dissimilar metals between the ears 13 and the copper contact wire 12, the aluminum rigid body 10 is
The contact surface between the contact wire 12 and the entire surface of the ear 13 or the contact surface with the contact wire 12 was coated with an insulating anti-corrosion paint made of epoxy resin or the like. Therefore, in the event that a train stops in the middle of the tramway and a large current is collected for some reason, the copper contact wire 12 and the aluminum rigid body 10 can be insulated with anti-corrosion paint. Therefore, the contact wire 12 alone bears this large current, and there is a risk that the contact wire 12 may be softened or deformed by the Joule heat. Further, there were other problems such as the need to increase the size of the contact wire 12 and the connecting fittings 16, 16 between the rigid body 10 and the contact wire in preparation for the above-mentioned accident.

The present invention was devised in view of the above points, and one embodiment illustrating the invention will be described below.
In Figures 1 to 5, reference numeral 1 denotes a rigid body made of aluminum with a T-shaped cross section of approximately 10 m in length and connected by welding in the longitudinal direction at the installation site to form a unit length of 100 to 200 m. A dovetail-shaped protrusion 2 is formed in the longitudinal direction, and the dovetail-shaped protrusion 2 that contacts the entire surface of the rigid body 1 or the contact wire is coated with an insulating anticorrosion paint made of epoxy resin or the like. Reference numerals 3 and 3 refer to two long copper contact wires having locking grooves 3a and 3b on both sides of the upper end, and reference numeral 4 refer to a plurality of relatively short contact wires each having a claw portion 4a that engages with the locking groove 3b of the contact wire 3. The ear 4 is made of aluminum, and the entire surface of the ear 4 or the portion of the claw portion 4a that engages with the locking groove 3b of the contact wire 3 is coated with an insulating anti-corrosion paint or anodized. 5 is the locking groove 3 of the contact wire 3
A relatively short aluminum bare ear having a claw portion 5a that engages with the contact wire 3, and conductive anticorrosive oil is applied to the entire surface thereof or the portion of the claw portion 5a that engages with the locking groove 3b of the contact wire 3, if necessary. You may. As the conductive anticorrosion oil, for example, grease mixed with metal powder is used. As shown in FIG. 5, this aluminum bare ear 5 is interposed at appropriate intervals between a plurality of ears 4 which have been subjected to surface treatment such as anti-corrosion coating, and a long rigid body 1 and a contact wire 3 are interposed at appropriate intervals. This is to provide electrical continuity. Numerals 6 and 7 are bolts and nuts for fastening the aluminum ear 4 with surface treatment such as anti-corrosion coating and the bare aluminum ear 5 to the rigid body 1, and 8 and 8 are bolts and nuts at both ends of the rigid body 1, as shown in FIG. This is a connection fitting that electrically connects the rigid body 1 and the contact wire 3. As shown in FIG. 3, the above-mentioned copper contact wire 3 has a locking groove 3a formed at its upper end engaged with a dovetail-shaped protrusion 2 of the rigid body 1, and the other locking groove 3b is subjected to surface treatment such as anti-corrosion coating. At the same time, as shown in FIG. each of which is tightened to the rigid body 1 with a bolt 6 and a nut 7 and attached to the lower end surface of the rigid body 1,
As shown in FIG. 5, the contact wires 3, 3 are electrically connected to the rigid body 1 at both ends thereof by connecting fittings 8, 8. In addition, although the illustrations and explanations have been made above regarding a rigid overhead contact line consisting of two contact wires, the present invention is not limited thereto, and can also be applied to a rigid overhead contact line having one contact wire. In addition, aluminum in this specification refers to aluminum,
It includes aluminum alloy, and copper includes copper alloy.

According to the present invention, an anticorrosive paint is applied to at least the lower end surface of the aluminum T-shaped rigid body 1 which is welded and connected to make it longer, and the lower end surface of the rigid body 1 is coated with a long copper contact wire. 3, the rigid body 1 and the contact wire 3 are connected at appropriate intervals between a plurality of aluminum ears 4 whose contact surfaces with the contact wire 3 are coated with anti-corrosive paint or alumite treated. Since the rigid body 1 and the contact wire 3 are electrically connected via the bare ears 5 at appropriate intervals by fixing the aluminum bare ears 5 to the rigid body 1 and the contact wire 3, the current flows between the rigid body 1 and the contact wire 3. Even if the train stops in the middle of the rigid trolley track and collects a large current, the large current will not flow only to the contact wire 3 as in the conventional case, and the contact wire 3
There is no possibility that the contact wire 3 will be softened or deformed by the Joule heat, and the rigid body 1 and the contact wire 3 will be connected at both ends of the rigid body 1.
The connecting fitting 8 that electrically connects the two can also be made smaller.
In addition, there is a risk that electrolytic corrosion may occur on the five bare aluminum ears, but this aluminum bare ear part is small when viewed from the whole, so the work required for maintenance is done by making all ears bare. It has excellent practical effects, such as being much more economical than conventional products.

[Brief explanation of the drawing]

1 and 2 are an exploded view showing a conventional rigid overhead contact line and a side view of the rigid overhead contact line, and FIGS. 3 to 5 are an exploded view showing an embodiment of the present invention and a side view of the rigid overhead contact line. FIG. 1: rigid body, 3: contact wire, 4: ear, 5: bare ear.

Claims (1)

[Scope of utility model registration request] An anticorrosive paint is applied to at least the lower end surface of a T-shaped aluminum rigid body made of elongated welded joints, and a long copper contact wire is placed along the lower end surface of the rigid body to connect the rigid body and the contact wire at least. It is characterized by a plurality of aluminum ears whose contact surfaces with the contact wire are coated with anticorrosive paint or subjected to alumite treatment, and aluminum bare ears are interposed and fixed at appropriate intervals between the ears. Rigid train track.