JPS5839102B2 - Suspended monorail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspended mole rail with improved noise generation.

A conventional suspension type mole rail is schematically shown in FIGS. 1 and 2.

In Figures 1 and 2, reference numeral 1 denotes an iron track girder with a cylindrical cross-sectional shape, and the track girder 1 is constructed at a predetermined height above ground using a number of supports 10 erected above the ground. The bottom of the suspension link 4 is provided with openings 8 at appropriate intervals so as not to hinder the movement of the suspension link 4 that moves as the vehicle 2 travels.

Reference numeral 3 denotes a bogie having a pair of running wheels 5, a guide wheel 6, and a drive motor 7 on the front and rear sides on both the left and right sides. It runs driven by T.

As this truck travels, the vehicle 2 suspended from the truck 3 by a suspension link 4 also travels.

In such suspended mole rails, the main noise source is concentrated within the track girder.

As shown in Figure 1, the track girder has a rectangular cross-section with the suspension link 4 passage section open, and the inside of the track girder is made of iron plate, and no sound absorption treatment has been applied. This creates a diffuse sound field, increasing the sound source level, and at the same time, sound propagates from the opening to the outside of the track girder, becoming a major cause of noise pollution.

In addition, there are no shields such as fences in the longitudinal direction of the track girder, and the sound generated in the bogie propagates within the track girder and is emitted to the outside from the track girder openings at the front and rear of the vehicle, so the sound source length is within the vehicle. The polarization (2 to 4 polarization) is many times larger than the length of the polarization (2 to 4 polarization), resulting in an increase in the ambient noise level.

The present invention provides a soundproofing cover having a shape protruding in the front and rear directions, respectively, installed on the front side of the frontmost bogie and the rear side of the rearmost bogie of an L-biased vehicle or each vehicle thereof, and on the inner surface of the track girder of the soundproofing cover. It is characterized by lining the facing part with sound absorbing material, and its purpose is to eliminate the above-mentioned drawbacks of the conventional method and to confine the sound generated by the bogie inside the track girder, which corresponds to the uneven growth of the vehicle, thereby shortening the sound source length and reducing noise. The present invention provides a suspended mole rail that deals with pollution.

The present invention is constructed as described above, and most of the noise generated by the bogie is contained within the soundproof covers provided on the front and rear sides of the bogies at the front and rear of the vehicle or on the front and rear sides of the one-component bogie, respectively. In addition, some of the noise leaking from the gap between the soundproof cover and the inner surface of the track girder is absorbed by the sound absorbing material lining the outer surface of the soundproof cover, reducing the noise level and almost eliminating noise propagation into the track girder.

Since the present invention is constructed and operates as described above, the source length of the noise is always equal to the vehicle unevenness, and the propagation from the track girder to the outside is reduced accordingly, which is effective in eliminating noise pollution. .

Hereinafter, the present invention will be described in detail with reference to the most preferred embodiments shown in FIG. 3A and FIG. 4B.

In the figures, the same amounts as above indicate the same parts.

In the figure, reference numeral 11 denotes a soundproof cover that is attached to the truck 3 by a coupling member 12 and has a shape that projects forward (or backward), and is made of an iron plate, an aluminum plate, or the like.

13 is a sound absorbing material pasted on the inner surface of the soundproof cover 11.

Reference numeral 14 denotes a sound absorbing material pasted on the outer surface of the soundproof cover 11 facing the inner surface of the track girder 1.

The lengths Ll and L2 of the upper and lower parts of the soundproof cover 11 facing the inner surface of the track girder in the vehicle traveling direction are approximately 1 m, and the sound absorbing material 14
The distance between the surface of the track girder and the inner surface of the track girder is about 30 cIrL, and the soundproof cover 11 and the sound absorbing material 14 are installed so as not to contact the track girder 1 as well as the current collector wire 9.

Furthermore, the soundproof cover 11 can be installed on the front side of the frontmost bogie and the rear side of the rearmost bogie of a one-component vehicle as shown in Figure 4A, or it can be attached to the front and rear bogies of each vehicle as shown in Figure 4A. It can be installed on the front and rear sides.

16 is a roof cover of the vehicle 2, and 17 is a connector between vehicles.

This embodiment is configured as described above, and the noise generated in the truck 3 is contained between the opposing soundproof covers 11, and the sound absorbing material 13 attached to the inner surface of the soundproof cover 11 reduces the level of the diffused sound. reduced.

In addition, when the noise propagates through the gap between the soundproof cover 11 and the track girder 1, the sound absorbing material 14 on the outer surface of the soundproof cover 11 and the inner surface of the track girder 1 act as a sound absorption duct to absorb the sound and reduce the sound pressure level. decreases.

To increase this effect, use 111. l
It is effective to make 12 small and to make Ll and L2 large.

In this way, in this embodiment, the noise generated by the bogie is contained within the opposing soundproof covers, so the length of the sound source when it leaks from the track girder can be shortened to the equivalent of one vehicle or one uneven growth, which reduces noise pollution. becomes less.

In addition, by extending the roof cover and using a sound insulation structure that limits noise propagation from the opening at the bottom of the track girder, it becomes possible to confine the sound generated from the bogie to the top of the vehicle, which is extremely effective in preventing noise pollution. It is valid.

[Brief explanation of drawings]

Figures 1A and 2 show the schematic structure of a conventional suspension type mole rail. The figure opening is a sectional view taken along the line A-A in Figure 1A, FIG. Figure A is a schematic structural explanatory diagram of this embodiment, Figure 3 is a cross-sectional view taken along line B-B in Figure 3 A, and Figure 4 A is a soundproof cover of this embodiment installed at the front and rearmost parts of an l-component vehicle. FIG. 4 is an explanatory diagram showing the soundproof cover of FIG. 4A installed at the front and rear of each vehicle. 1...Track girder, 2...Vehicle, 3...
... Trolley, 11 ... Soundproof cover, 13, 14
...Sound absorbing material.

Claims (1)

[Claims] A soundproof cover with a shape protruding in the longitudinal direction is installed on the front side of the frontmost bogie and the rear side of the rearmost bogie of a vehicle with 11 configurations or each vehicle, and a soundproofing cover is installed on the part of the soundproofing cover facing the inner surface of the track girder. A suspended mole rail characterized by being lined with wood.