JPS586760Y2 - railway silencer - Google Patents

Description

[Detailed explanation of the invention] Noise pollution caused by the Shinkansen has become a major social problem, and it has become difficult to operate at high speed without solving this noise pollution.

Most of the noise generated by trains comes from between the wheels and the rails, and it is difficult to muffle this noise once it has been emitted outside.

Therefore, using tunnels and soundproof walls is not effective;
An effective method of muffling noise, which is not economical, is to contain it at the point where it is generated, and car mufflers and bugle silencers are good examples of this.

From this point of view, this invention has a structure in which sound deadening boards are attached to trains and sleepers, and the noise generated from the wheels and rails is effectively and economically muffled by repeating the echoes.

The structure of this invention will be explained with reference to the drawings.

From the lower ends of both sides of the high-speed vehicle 1 toward the wheels 2,
Alternatively, a sound deadening board 3 made of a lightweight board material such as an aluminum panel and having a sound deadening material such as Rotsukur attached to its inner surface is hung removably, and fin plates 4 made of the same material are protruded from the outside of the sound deadening board 3. A sound deadening board 6 made of sound deadening material such as Rotsukur is removably installed on the inner surface of FRP/aluminum panel slate material or asbet material facing in the direction in which the vehicle 1 passes from both sides of railroad sleeper roadbed 5. 6, fin plates 7, 7 made of the same material are provided diagonally downwardly protruding toward the vehicle 1 passing side,
Fin plates 4, 4 protruding diagonally downward from the sound deadening plate 3 of the vehicle 1
and fin plates 7, 7 which are provided obliquely downwardly and protrude from the sound deadening plate 6 of the sleeper 5, etc., are arranged so as to intertwine with each other.

Further, a stretchable sheet 8 or the like is used between the sound deadening plates 3, 3 at the connecting portion between the vehicles 1, 1.

Furthermore, as a countermeasure against snow damage, a heater or a water sprinkling device can be attached to the sound plates 3 and 6.

Since this device has the above-described structure, the noise generated between the wheels 2 and the rails 9 of the high-speed vehicle 1 is contained above by the floor of the vehicle 1 and the sound deadening plates 3 on both sides, and some of it is absorbed by the sound deadening plates 3. However, the remaining noise is caused by the fin plates 4, 4 and fin plates 7, 7.
Using almost the same principle as when the sound passes through a muffler, the sound is effectively repeated and muffled, and the sound is not emitted to the outside.

Therefore, in this system, (1) no special weight reinforcement is required for the vehicle 1 or the track equipment, and (2) the sound deadening plates 3, 6 and the fin plates 4, 4, 7, 7 can be mass-produced by molding, thereby reducing costs.

(3) Sound can be muted without increasing the running resistance of the train or having any effect on passengers.

(4) Since this device can be attached to and removed from vehicles and sleeper roadbeds, it can be used on existing vehicles and existing routes.

(5) Since the mechanism is simple, maintenance and inspection are easy.

(6) It has the effect of saving resources and energy compared to other noise reduction methods.

In addition, in high-speed railways, the tracks are well maintained and the vehicles have good anti-vibration properties, so there is little vertical and horizontal movement due to operation, so if an appropriate gap is provided, the fin plates 4, 4 and 7°7 will come into contact. There is no fear that this will happen.

This device is a device that effectively muffles the noise generated by trains by taking advantage of the fact that light and sound have the property of significantly losing their intensity due to curvature reverberation, and can be expected to have a certain effect. It is something.

[Brief explanation of the drawing]

Figure 1 is a partially sectional front view of a high-speed railway vehicle and track to which this invention is installed, Figure 2 is a side view of the connecting part of the vehicle, and Figure 3 is an enlarged cross-section of the structural attachment part of this invention in Figure 1. 4 are cross-sectional views of the muffler. 1... Vehicle, 2... Wheels, 3...
... Sound deadening board, 4... Sound deadening fin board, 5...
・Sleeper roadbed, etc., 6... Sound deadening board, 7...
Sound deadening fin board.

Claims (1)

[Claims for Utility Model Registration] A first sound deadening plate 3 is attached to the outer side of the wheel 2 from the lower ends of both sides of the vehicle 1, and a plurality of first sound deadening fin plates 4 are attached to the outside of the first sound deadening plate 3 diagonally downward. .
A plurality of second sound deadening fin plates are arranged diagonally downward inside the second sound deadening plate 6. 7 is provided protrudingly so that the first and second fin plates 4, 4, 7.7 of the first and second sound deadening plates 3, 6 face each other and intertwine.
, 2 sound deadening plates 3, 6 arranged opposite each other.