JPH0328881B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soundproof pantograph that reduces trackside noise of high-speed electric railways.

[Problem that the invention seeks to solve]

Since conventional pantographs are mounted naked on the roof of a vehicle, trackside noise is generated by the pantograph hull S sliding on the overhead wire T and the pantograph frame W supporting the pantograph frame W, which is a noise source in high-speed electric railways.

[Purpose of the invention]

The present invention reduces lineside noise of high-speed electric railways by housing the vehicle's pantograph hull S and pantograph frame W, which are sources of noise, in a soundproof case U.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.
The soundproof pantograph of the present invention is a pantograph having a soundproof case U, an insulating support rod Y, and a power release switch Z. Fig. 1 is a side view when electricity is applied to the vehicle, and Fig. 2 is a side view when electricity is not applied to the vehicle. FIG. 3 is a side view of the present invention;

3 is a plan view of the soundproof case U portion, and FIG. 4 is a sectional view of the soundproof case U portion.

As shown in Figures 3 and 4, the soundproof case U is
A sound absorbing material P is applied to the inner wall, an opening M is provided above, and a pantograph frame W is housed inside. Further, as shown in FIGS. 1 and 2, only the pantograph hull S enters and exits from a portion M that opens depending on the top and bottom of the pantograph frame W.

As shown in Figs. 1 and 2, the insulating support rod Y is
It is attached to the vehicle body C and supports the soundproof case U at the upper end.

The power release switch Z is a switch that turns on and off between the pantograph and the bushing K that takes in electricity to the vehicle. When powering on the vehicle, as shown in Figure 1, raise the pantograph frame W and turn on the power release switch Z, and when not powering the vehicle, as shown in Figure 2, lower the pantograph frame W. Lower it and turn off the power release switch Z.

The main noise caused by the pantograph is generated by the arc caused by the sliding of the pantograph hull S with the overhead wire T and by the turbulence of high-speed airflow generated in the pantograph hull S and the pantograph frame W.

The noise-type pantograph is designed to reduce lineside noise by surrounding these noise sources from below with a soundproof case U and absorbing the noise with a sound-absorbing material P stretched on the inner wall of the case. For this purpose, it is desirable to bring the soundproof case U as close as possible to the overhead wire T and to surround the sliding part with the pantograph hull S.

When the power release switch Z shown in FIG. No arc will fly there from the overhead wire T.

Therefore, with the soundproof pantograph of the present invention, when the vehicle is running, the soundproof case U can be brought close to the overhead wire T without coming into contact with it, thereby enclosing the noise source to the maximum extent and enhancing the effect of reducing trackside noise.

Note that the soundproof case U, insulating support rod Y, bushing K, etc. are shaped to reduce wind noise.

In the embodiments described above, the soundproof case U is provided with ventilation holes X at the front and rear of the soundproof case U in the direction of movement. This is to prevent snow from accumulating inside the soundproof case U, and when used in an area with little snow, the effect of reducing trackside noise will be the same even if the ventilation hole X is not provided.

FIG. 5 is a side view of a conventional pantograph when electricity is applied to a vehicle, and FIG. 6 is a side view of a conventional pantograph when electricity is not applied to a vehicle.

As shown in Figure 6, the pantograph and the bushing K that takes in electricity to the vehicle are connected by a spanning bar L, so when the vehicle is not receiving electricity, the pantograph hull S must be moved at a large distance from the overhead wire T to prevent high-voltage arcs from flying. I had to separate it and lower it.

Therefore, it was difficult to attach a soundproof case to a conventional pantograph to enclose the noise source, and the pantograph hull S and pantograph frame W were mounted bare on the roof of the car body C. There was a noise.

〔Effect of the invention〕

The soundproof pantograph of the present invention has a soundproof case U that surrounds the vehicle's pantograph hull S and pantograph frame W, which are sources of noise, with a soundproof case U placed close to the overhead wire T.
It is possible to reduce noise along the lines of high-speed electric railways.

[Brief explanation of drawings]

Figure 1 shows the soundproof case U when powering up the vehicle.
A side view of the pantograph of the present invention having an insulating support rod Y and a power release switch Z, and FIG. 2 shows the soundproof case U and the insulating support rod Y when the vehicle is not powered.
3 is a plan view of the soundproof case U portion, FIG. 4 is a sectional view of the soundproof case U portion, and FIG. 5 is a side view of the pantograph of the present invention having a power release switch Z. FIG. 6 is a side view of the conventional pantograph when electricity is turned on, and FIG. 6 is a side view of the conventional pantograph when electricity is not applied to the vehicle. T... Catenary wire, S... Pantograph hull, W... Pantograph frame, U... Soundproof case, Y... Insulating support rod,
W...butching, C...car body, B...bogie, M...opening, P...sound absorbing material, I...pantograph support insulator, L
...Water bar, Z...power release switch, X...ventilation port.

Claims (1)

[Scope of Claims] 1. A soundproof pantograph comprising a soundproof case U, an insulating support rod Y, and a power release switch Z, wherein the soundproof case U has an inner wall covered with a sound absorbing material P and an opening M at the top. A pantograph frame W is housed inside, and only the pantograph hull S is moved in and out from the opening depending on the top and bottom of the pantograph frame, and the insulating support rod Y is attached to the vehicle body C and a soundproof case is attached at the upper end. The power release switch Z connects the pantograph and the bushing K that takes in electricity to the vehicle, and is turned off when the pantograph frame W is lowered. Soundproof pantograph.