JPS5839101B2 - Sound insulation structure of suspended monorail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound insulation structure for a vehicle connecting portion of a suspended mole rail.

A conventional suspended mole rail is schematically shown in FIG. 1a.

In the figure, the vehicles 1 usually take the form of a train in which one to four cars are connected, and each vehicle 1 is connected to a bogie 3 via two suspension devices 7.

The train runs as the bogie 3 runs inside the track girder 2 installed at about 8 m above the ground.

The lower part of the track girder opens into the longitudinal water of the track girder 2 for a suspension device 7, as shown in FIG.

The main noise source of the suspended mole rail with the opening 4 is the bogie 3 and its surroundings.

Specifically, the components of the truck 3 include a motor, a reduction gear, running tires, guide tires, a current collector, and the like.

The noise generated around the bogie 3 diffuses into the track girder 2,
It is propagated to the outside of the track girder 2 through the lower opening 4 of the track girder 2.

One possible method for reducing this noise is to block the sound propagation path, and for example, a method as shown in FIG. 2 has been proposed.

That is, by extending the roof cover 5 on the front, rear and both sides of the vehicle 1, reducing the gap between the lower surface of the track girder 2 and the tip of the roof cover 5, and pasting sound absorbing material on the upper surface and inner surface of the roof cover 5. , the noise propagated onto the vehicle from the opening 4 is contained on the roof of the vehicle, thereby preventing the noise from propagating to the outside.

However, when sound isolating using such a method, the most problematic issue is the treatment of the connecting portion 8 of the vehicle.

In other words, the mole rail has many curves with small curvatures, figure 8 curves, etc., which causes antiphase vibrations and large angle bends between each vehicle, so the connecting part 8 cannot constitute a sound insulating wall with the roof cover 5 alone. Even if the cover 5 constitutes a sound insulating wall, noise will propagate to the outside from the connecting portion 8.

In the present invention, a sound insulating body that covers the roof ends of both vehicles and whose width is approximately equal to the width of the vehicle is arranged in the upper part of the vehicle connection part so as to be rotatable around a support rod attached to the roof of one of the vehicles. The outer surface of the sound insulating body is lined with a sound absorbing material so as to reduce the gap between the surface of the sound absorbing material and the track girder and the roof cover, and its purpose is to eliminate the drawbacks of the conventional method. The present invention provides a sound insulation structure for a vehicle connection part of a suspended type mole rail that allows relative shaking between vehicles and large angle bending, and insulates the propagation of noise generated within a track girder to the outside.

As described above, according to the present invention, the sound insulating body provided at the vehicle connection part rotates around the support rod attached to the roof of one vehicle in response to the mutual movement of the vehicles, so that the relative shaking of the vehicles and the large Angular bending can be tolerated.

In addition, the gap between the surface of the sound absorbing material lined on the surface of the sound insulator and the lower surface of the track girder and the roof cover is small and this acts as a sound-dampening duct, so the noise generated in the track girder is transmitted to the lower part of the track girder at the connecting part of the vehicle. It is effective in eliminating noise pollution because it reduces the sound propagating from the opening and further reduces the noise propagating inside the roof cover from the connecting part.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 3 and 4.

In the figures, the same reference numerals as above indicate the same parts.

A support rod 10 is fixed perpendicularly to the roof of the vehicle 1a, and a sound insulator 9 is rotatably attached to the support rod 10.

The sound insulating body 9 is composed of a sound insulating plate 9', a side plate 9'', and a bottom plate 9'', and its planar shape is circular.

In addition, the sound insulation board 9' is made of a plate with a relatively high density, such as a steel plate with a diameter of about 3 to 9 mm, and the overall rigidity of the sound insulation body 9 is increased by the side plates 9'' and the bottom plate 9'', thereby increasing its strength. There is.

The position of the support rod 10 is a distance apart from the center 12 of the planar shape of the sound insulation body 9.

The distance should be slightly wider than 1/2 of the gap between vehicles.

Further, it is desirable that the distance 11 between the sound insulator 9 and the roof cover 5 is as small as possible, and is set to 100 wLIIL or less.

The outer surface of the sound insulator 9 is lined with a sound absorbing material 11.

The lining thickness of the sound absorbing material 11 is, for example, about 40 to 60 mm.

The gap between the outer surface of the sound absorbing material 11 and the lower surface of the track girder 2 is, for example, about 100 to 3001 m, and the gap to the vehicle roof is about 30 to 50 m.

Also, there is a gap l between the outer surface of the sound absorbing material 11 and the inner surface of the roof cover 5.

For example, the sound absorbing material 11 on this side surface is preferably 40 to 50 m or less, and the sound absorbing material 11 on this side is used as the roof cover 5 and the sound insulating material 9 due to the movement of the vehicle.
It is also effective in preventing direct contact between the two and avoiding damage and noise caused by collision between the two.

In this way, this embodiment is constructed as described above, and when the vehicles shake relative to each other or turn at a large angle, the sound insulating body collides with the roof cover through the sound absorbing material, and is rotated by the roof cover around the support rod. Therefore, the sound insulating body moves in response to the mutual movement of the vehicles, and cannot prevent the movement of the vehicles.

Furthermore, since the planar shape of the sound insulator is circular, the degree of freedom of movement between vehicles is further increased.

The gaps between the sound-absorbing material lined on the outer surface of the sound insulation body, the lower surface of the track girder, the vehicle roof, and the inner surface of the roof cover are small, and each acts as a kind of sound-deadening duct, reducing the noise generated around the bogie inside the track girder. This prevents the noise from propagating to the outside from the lower opening of the track girder in the vehicle connection part, and also prevents the noise propagating into the roof cover from the lower opening of the track girder and the noise generated inside the roof cover from the vehicle. It is effective in eliminating noise pollution because it prevents it from propagating to the outside through the joint gap.

In this embodiment, the planar shape of the sound insulator is circular, but it is not limited to this. For example, it may be oval as shown in FIG. 5, or it may be oval, and various shapes with smooth corners may be used. is possible.

Further, in this embodiment, the side plates and the bottom plate are used as reinforcement structures for the sound insulating plate, but these may be made into a frame structure to reduce the weight.

Furthermore, when lining the outer surface of the sound insulating body with a sound absorbing material, the surface of the sound absorbing material may be lined with vibration isolating rubber, or the sound absorbing material may be lined with vibration isolating rubber in a multi-layered manner.

[Brief explanation of drawings]

Fig. 1A is an explanatory diagram showing the general appearance of a conventional suspension type mole rail with a part cut away;
FIG. 2 is a schematic explanatory diagram of a suspended mole rail in consideration of noise prevention in FIG. 1, FIGS. 3 and 4 show an embodiment of the present invention, and FIG. Fourth
The figure is a BB parent diagram of FIG. 3, and FIG. 5 is an explanatory diagram showing the same part as FIG. 4 of another embodiment of the present invention. 1.1a, 1b... Vehicle, 2... Track girder, 5... Roof cover, 6... Connecting rod, 9... Sound insulation body, 10...Support rod,
11...Sound absorbing material.

Claims (1)

[Claims] 1. A sound insulation body whose width is approximately equal to the width of the vehicle is arranged in the upper part of the vehicle connection part so as to cover the roof ends of both vehicles, and the sound insulation body is rotatably arranged around a support rod attached to the roof of one of the vehicles. A sound insulating structure for a suspended mole rail, characterized in that the outer surface of the body is lined with a sound absorbing material so that the gap between the surface of the sound absorbing material and the track girder and roof cover is reduced.