JPH0735232U - Sound insulation structure for magnetically levitated railway vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a sound insulation structure for a magnetically levitated railway vehicle capable of enhancing the sound insulation effect while preventing an increase in the weight of the vehicle body. A sound insulation structure for a magnetically levitated railway vehicle includes a structure outer plate 11, a stringer 12, a vibration insulating material 20 fixed to the stringer 12, a magnetic shield plate 19 fixed to the vibration insulating material 20, and an interior. It is composed of a material 17.
A heat insulating and sound insulating material 18 is filled in the gap 10 defined by the stringer 12. Since the magnetic shield plate 19 is installed on the stringer 12 via the vibration insulating material 20, the vibration transmission of the magnetic shield plate 19 is prevented by the vibration insulating material 20.
Can be suppressed and the acoustic emission of solid-borne sound can be reduced. The weight of the magnetic shield plate 19 effectively acts as a sound insulation material against the transmitted sound from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sound insulation structure for a magnetically levitated railway vehicle.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, the sound insulation structure of a magnetically levitated railway vehicle has a sound insulation and sound insulation material 58 such as glass wool in a gap 50 between a structure outer plate 51 and an interior material 57 partitioned by a stringer 52 to provide a sound insulation effect. A structure was known in which only the weight necessary to obtain it was filled.

By the way, in a magnetically levitated railway vehicle, it is necessary to install magnetic shield plates 59 and 69 on the sides and floor of the vehicle body in order to magnetically shield the inside of the vehicle. The magnetic shield plate 59 on the side of the vehicle body is fixed to the stringer 52 via a metal piece 60, and the magnetic shield plate 69 on the floor is directly installed on the cross beam 55 as a vehicle body strength member, on which the floor plate 56 is mounted. Was placed. Therefore, the magnetic shield plates 59 and 69 only have a function of magnetically shielding the inside of the vehicle body, and do not function as a sound insulating material.

[0004]

[Problems to be solved by the device]

 However, due to the demand for higher speed of the magnetically levitated railway vehicle, further weight reduction of the vehicle body is required, and there is a possibility that the weight of the heat insulating and sound insulating material 58 to be filled cannot be sufficiently secured. On the other hand, with the increase in speed of magnetically levitated railway vehicles, noise due to boundary layer pressure fluctuations generated on the outer surface of the vehicle body increases, so the development of a sound insulation structure with high sound insulation effect has been desired.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sound insulation structure for a magnetic levitation railway vehicle that can enhance the sound insulation effect while preventing an increase in the weight of the vehicle body.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the sound insulation structure of a magnetic levitation railway vehicle according to the present invention comprises a vehicle body strength member provided on a magnetic levitation railway vehicle, and a vehicle body strength member inside the vehicle body of the magnetic levitation railway vehicle. And a magnetic shield material attached to the member via a vibration insulating material.

[0007]

[Action]

 In the sound insulation structure of the magnetically levitated railway vehicle of the present invention having the above configuration, the magnetic shield material essential for the configuration of the magnetically levitated railway vehicle is the vehicle body strength member provided in the vehicle and the low-vibration insulating material. It is attached through. For this reason, the vibration transmission of the magnetic shield material is suppressed, and the acoustic radiation of solid-borne sound is reduced. In addition, it is known that the surface density is the only factor that contributes to sound insulation from outside the vehicle, especially aerodynamic noise, regardless of the material. The weight of the shield material effectively acts as a sound insulation material.

As described above, since the magnetic shield plate functions as a sound insulating material, the sound volume is increased, and the weight increase of the heat insulating sound insulating material can be suppressed to a minimum.

[0009]

【Example】

 A preferred embodiment of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a partially enlarged view of FIG. The sound insulation structure on the side of the car body 1 of the magnetically levitated railway vehicle comprises a structure outer plate 11 of the car body 1, a stringer 12 rigidly connected to the structure outer plate 11, and a vibration insulating material 20 fixed to the stringer 12. It is composed of a magnetic shield plate 19 fixed to the vibration insulating material 20 and an interior material 17 forming the inner side surface of the vehicle body.

The structure outer plate 11 forms the outer surface of the vehicle body 1, and forms the gap 10 together with the interior material 17 that forms the inner surface of the vehicle body 1. In the gap 10, a plurality of stringers 12 extending in the front and rear directions of the vehicle are provided in the structure outer plate 11 in the structure outer plate 11. The stringer 12 divides the gap 10 into a plurality of spaces. A heat insulating and sound insulating material 18 is filled in the divided gap 10. As the heat insulating and sound insulating material 18, for example, glass wool packaged with an aluminum thin film can be used. The stringer 12 corresponds to the vehicle body strength member of the present invention.

The magnetic shield plate 19 is fixed to the stringer 12 via the vibration insulating material 20 along the shape of the interior material 17 in the gap 10. The magnetic shield plate 19 is an indispensable member for magnetically shielding the inside 1a of the vehicle body 1. For example, it is represented by industrial pure iron having a low carbon content, an electromagnetic steel plate containing silicon, and the like. It is preferable to use a material having a high magnetic permeability and a high saturation magnetic flux density. Here, the high magnetic permeability refers to an index that represents the property of allowing a large magnetic flux density to flow with a small magnetizing force. As the vibration insulating material 20, any member that has low rigidity and absorbs vibration can be used. For example, rubber material such as synthetic rubber or natural rubber typified by urethane rubber, or oil inside may be used. Examples include hydro suspensions, dampers, air cushions, and cushioning materials such as springs.

On the other hand, the sound insulation structure of the floor portion of the vehicle body 1 includes a support beam 14 which is erected vertically on the bottom surface of the vehicle body 1, a cross beam 15 bridged by the support beam 14, and vibration isolation fixed to the cross beam 15. The material 30, a magnetic shield plate 29 fixed on the vibration insulating material 30, and a floor plate 16 fixed on the magnetic shield plate 29. The floor plate 16 has sufficient strength to support the load of passengers and chairs.

The vibration insulating material 30 may be provided on the entire surface of the horizontal beam 15, but may be provided only at a portion facing the support beam 14. The same material as the vibration insulating material 20 described above can be used for the vibration insulating material 30. The magnetic shield plate 29 can also be made of the same material as the magnetic shield plate 19 described above. The cross beam 15 corresponds to the vehicle body strength member of the present invention.

Next, the function and effect of the sound insulation structure of the magnetically levitated railway vehicle according to this embodiment will be described below. The magnetic shield plate 19 in the sound insulation structure on the side of the vehicle body 1 is not rigidly connected to the stringer 12 but is installed via the vibration insulating material 20. For this reason, the vibration insulating material 20 suppresses the vibration transmission from the vehicle body 1 to the magnetic shield plate 19, and the acoustic radiation of the solid propagation sound can be reduced. In addition, it has been found that only the areal density contributes to sound insulation from noise from outside the vehicle, especially aerodynamic noise, regardless of the material. The weight of the shield plate 19 effectively works as a sound insulating material.

The magnetic shield plate 29 in the sound insulation structure on the floor of the vehicle body 1 also operates in the same manner as the magnetic shield plate 19 and has the same effect. However, in addition to the magnetic shield plate 29, the weight of the floor plate 16 acts as a sound insulating material against the transmitted sound from the outside, so that the sound insulating effect is further enhanced.

As described above, since the sound insulation effect can be enhanced by utilizing the magnetic shield plates 19 and 29 and the floor plate 16 which are indispensable to the magnetic levitation railway vehicle, the weight of the heat insulating and sound insulating material 18 is increased. Without this, it is possible to reduce the noise level inside the vehicle. Further, as a measure for noise in the vehicle, when the weight of the magnetic shield plates 19 and 29 is sufficiently large, it is possible to reduce the surface density of other members to reduce the weight.

Needless to say, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the scope of the invention. For example, instead of the stringer 12 in the gap 10, a structure frame as a vehicle body strength member may be provided along the peripheral surface of the vehicle, and the magnetic shield plate 19 may be fixed to the structure frame via the vibration insulating material 20. . Alternatively, the structure outer plate 11 may be used as a vehicle body strength member, and the magnetic shield plate 19 may be fixed to the structure outer plate 11 via the vibration insulating material 20.

[0018]

[Effect of device]

 As described in detail above, according to the sound insulation structure of the magnetic levitation railway vehicle of the present invention, the sound insulation effect can be enhanced while preventing the weight increase of the vehicle body.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional magnetic levitation railway vehicle.

[Explanation of symbols]

1 ... Vehicle body, 10 ... Gap, 11 ... Structure outer plate, 12 ...
・ Stringers, 14 ... Support beams,
15 ... Horizontal beam, 16 ... Floor board,
17 ... Interior material, 18 ... Insulation and sound insulation material,
19, 29 ... Magnetic shield plate, 20,
30 ... Vibration insulation,

Claims (1)

[Scope of utility model registration request] 1. A vehicle body strength member provided in a magnetic levitation railway vehicle, and a magnetic shield material attached to the vehicle body strength member inside the vehicle body of the magnetic levitation railway vehicle via a vibration insulating material. A sound insulation structure for a magnetically levitated railway vehicle, characterized by being equipped with.