JP3210643B2 - Ground terminal block for railway vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground terminal block provided under a floor of a railway vehicle, which eliminates the need for curing the ground terminal block, simplifies its installation work, and reduces its maintenance cost. Can be done.

[0002]

2. Description of the Related Art An outline of a power supply path to each device of a railway vehicle is as shown in FIG. 1, and power is supplied from a wire 1 to a device 3 via a pantograph 2 and wiring in the vehicle. The device 3 is connected to a ground wire 25 via a ground terminal block 20 provided under the vehicle floor. The conventional ground terminal block 20 is configured such that a ground plate 21 made of a copper plate is adhered to a connection portion of the L-shaped ground terminal block body 20a made of a steel plate with a conductive wire, and the ground terminal block body 20a is mounted on a vehicle. It is fixed by welding under the floor.
The earth wire etc. is fixed to. By the way, the ground terminal block 2
0 is mounted under the floor of the railway vehicle in an exposed state, and is exposed to a severe environment under the floor. Surface maintenance is required. On the other hand, since the ground plate 21 is made of a copper plate and to which a conductive wire such as a ground wire is connected, it takes a lot of man-hours to attach the ground plate 21 and paint is not applied to the connection portion. (Because the conductivity of the connection surface with the conductive wire decreases when paint is applied)
It is necessary to paint the ground terminal block main body 20a. The above painting work is troublesome and time-consuming, and the maintenance of the painted surface is troublesome because it is a work under the floor of the vehicle.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to easily solve the above-mentioned problems in the conventional ground terminal block of a railway vehicle, by omitting a copper plate ground plate, and by grounding so that rust-proof coating can be omitted. It is an object to devise the structure of the terminal block.

[0004]

Means taken for solving the problem is that the ground terminal block body is made of a stainless steel plate, and the connection surface of the ground terminal block body made of the stainless steel plate with the conductive wire is made conductive. The conductive surface is formed by a solder plating layer, and the thickness of the solder plating layer is set to 0.03 mm or more, assuming the ground terminal block of the railway vehicle as the surface.

[0005]

[Function] The main body of the ground terminal block must be welded and fixed directly to the vehicle body. However, it is made of stainless steel plate and can be welded to the vehicle body without any problem. There is no need to paint. On the other hand, since there is a solder plating layer on the connection surface of the ground terminal block main body with the conductive wire, the solder plating layer ensures sufficient conductivity with the conductive wire such as the ground wire. Therefore, it is not necessary to attach a copper plate for securing conductivity to the connection surface with the conductive wire, and it is not necessary to perform rust-proof coating, and it is not necessary to periodically perform maintenance on the rust-proof coating surface. Also,
Since the solder plating layer of stainless steel plate does not peel off for a long time and its thickness is 0.03 mm or more, even though the ground terminal block of the railway vehicle is exposed to the severe use environment under the floor, Durability is sufficiently ensured. Therefore, there is no need to perform maintenance to ensure long-term conductivity.

[0006]

Next, an embodiment will be described with reference to FIG.
Although the shape and size of the ground terminal block 30 of this embodiment are not different from those of the prior art, the ground terminal block main body 30a is formed by bending a stainless steel plate into an L shape. A solder plating layer 31 is formed on the connection surface with a conductive wire such as a ground wire. However, in this embodiment, almost the entire surface of the hanging portion 30b of the ground terminal block main body 30a (portion to which the conductive wire is connected) for convenience of plating. Is solder plated. The thickness of this solder plating layer is at least 0.03 mm from the viewpoint of durability.
However, it is desirable to set the target value to about 0.05 mm in the solder plating operation in consideration of the variation in plating thickness due to the actual plating operation.

[0007]

[Effect] As described above, the grounding terminal block body is made of stainless steel plate which is relatively inexpensive, has excellent workability and corrosion resistance, and is excellent in weldability to a vehicle. Of the soldering layer applied to the stainless steel plate, the ground terminal block can be welded to the vehicle body without hindrance, and a copper plate for curing is attached to the ground terminal block body. There is no need, and there is no need for anti-rust coating. Furthermore, by setting the thickness of the solder plating layer to 0.03 mm or more, the durability is sufficiently secured even though the ground terminal block of the railway vehicle is exposed to a severe use environment under the floor. Therefore, there is no need to perform regular maintenance to prevent rust and ensure long-term conductivity. therefore,
The manufacturing cost of the ground terminal block can be reduced, and the maintenance cost during the service period can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view of a railway vehicle showing an arrangement of ground terminal blocks.

FIG. 2A is a front view of a conventional ground terminal block,
(B) is a side view of the ground terminal block.

FIG. 3A is a front view of a ground terminal block according to the embodiment;
(B) is a side view of the ground terminal block.

[Explanation of symbols]

 1: Overhead wire 2: Pantograph 3: Equipment 20, 30: Ground terminal block 20a: Ground terminal block main body 21: Copper plate 22: Hole 25: Ground wire 30a: Ground terminal block main body 30b: Hanging portion of ground terminal block 31: Solder plating layer

Claims (1)

(57) [Claims] 1. The grounding terminal block main body is made of a stainless steel plate.
Between the conductive wire of the stainless steel plate and the ground terminal block body.
In a ground terminal block of a railway vehicle having a connection surface as a conductive surface, the conductive surface is formed by a solder plating layer, and
The thickness of the plating layer is 0.03 mm or more.
Ground terminal block .