JPH0121494Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used to connect important points of the rail to a substation in order to eliminate impedance loss in the rail when the rail is a return line for current in an electric railway. The rail terminal includes a split tube that is inserted into the rail hole, a bolt and nut that are inserted into the split tube and are tightened to press the split tube into the rail hole, and a tube for inserting the coated cable. The present invention relates to a rail terminal having a section.

As shown in FIG. 1, a conventional rail terminal of this type includes a split tube section 22 inserted into a rail hole 21a, a pedestal section 23 protruding from the split tube section 22, and a tube section 25 for inserting a covered cable 24. Because it was composed of a single, integrated object, the following problems were resolved.

That is, the sheathed cable 24 has a large number of lead wires bundled together and is coated with insulation, and is quite hard due to its large diameter and because the sheathing material is a series of tubes. Furthermore, this coated cable 24 is connected to a current collection box (not shown).
Since it is fixed with mortar 27 at the insertion part into the pit 26 leading to
4, it acts strongly on the rail terminal C with almost no relief, and a crack is formed at the base of the split tube part 22, which is the weak point, and a part of the bare wire at the tip of the covered cable 24 is cut off. or In this case, the electrical resistance increases, and the cracks and cut portions generate heat and melt and damage, which further increases the electrical resistance, creating a vicious cycle.

The purpose of the present invention is to solve the problems seen in the above-mentioned conventional examples.

The rail terminal of the present invention devised to achieve this purpose has the split tube side which is crimped into the rail hole by the bolt/nut, and a large number of lead wires bundled together and insulated. The insertion tube side to which one thick coated cable is fixed is separated, and a connector is formed on each of the split tube side and the insertion tube side, and a large number of thin cables are connected independently of each other. The present invention is characterized in that both connectors are fixed to both ends of a group of flexible cables.

The operation of the above structure of the present invention is as follows.

Since a large number of flexible cables are used to secure a predetermined current-carrying cross-sectional area, each flexible cable only needs to have a sufficiently small cross-sectional area, and the flexibility of each cable is extremely small. It will be expensive. And since such highly flexible cables are independent of each other, even if many cables are installed in parallel,
The entire cable group is highly flexible.

Therefore, stress caused by rail vibration is reliably absorbed and alleviated by the highly flexible cable group.

According to the present invention having the above-described structure and operation, it is possible to solve the problems of the conventional technology, such as cracks occurring at the base of the split tube part, which is a weak point in terms of strength, and cutting the tip of the coated cable into a thin strip. The durability of the entire cable can be greatly improved. In addition, since it can be easily bent, it is easier to align the cable with the rail hole, compared to the conventional structure in which the cable is forcibly deformed and fixed to the rail, thereby improving work efficiency.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

A is the connector on the rail 1 side, and is connected to the rail hole 1a.
The main body 6, in which the split tube portion 2, the pedestal portion 3, and the connection portions 5 of multiple flexible cables 4 to be inserted into the rail hole 1a are integrated, and the split tube portion 2 is expanded in diameter to fit into the rail hole 1a. It has bolts and nuts 7 for crimping. 8 is a plurality of split grooves, 9 is a flat washer, and 10 is a spring washer.

Reference numeral B designates a connector on the side of the coated cable 11, in which a cylindrical portion 12 for insertion of the bare wire portion of the coated cable 11 and connection portions 13 of a large number of flexible cables 4 are integrated in series.

Connection portions 5 and 13 in both connectors A and B
Each has a large number of holes 14, 15 into which the ends of the flexible cables 4 are inserted, and with the flexible cables 4 inserted, they are tightened and crimped from the outside.

Figure 4 shows the connection part 5 of connector A on the rail 1 side.
However, the connecting portion 13 of the connector B on the covered cable 11 side also has a structure similar to that shown in FIG.

The flexible cables 4 are sheathed with wire braid over their entire length, but a portion of the wire braid is omitted in FIG. 2.

Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing the state in which a conventional rail terminal is installed. 2 to 4 relate to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a -
A cross-sectional view taken along the line, FIG. 4 shows − in FIG. 2.
It is a sectional view taken along the line. 1a...Rail hole, 2...Split tube part, 4...Flexible cable, 7...Bolt/nut, 11...
Covered cable, 12... Tube part for insertion, A, B...
connector.

Claims (1)

[Scope of utility model registration request] A split tube portion 2 inserted into the rail hole 1a, a bolt/nut 7 that is inserted through the split tube portion 2 and presses the split tube portion 2 into the rail hole 1a by tightening, and a tube for inserting the covered cable 11. A rail terminal comprising a portion 12, the split tube portion 2 side being crimped into the rail hole 1a by the bolt/nut 7, and a single rail terminal having a plurality of lead wires bundled together and insulated. The side of the insertion tube 12 to which the thick coated cable 11 is fixed is separated, and the connectors A and B are formed on the split tube 2 side and the insertion tube 12 side, respectively, so that they are independent from each other. A rail terminal constructed by fixing both connectors A and B to both ends of a group of many thin flexible cables 4.