JPH0761348A - Magnetism shielding structure of magnetic levitation vehicle - Google Patents

Abstract

PURPOSE:To provide light and strong out-of-plane rigidity and suppress the lowering of magnetic permeability by making a panel wherein high magnetic permeable metal panel is used for at least one front member out of two front members and light alloy metal plate is used for the other front member and honeycombs made of light alloy metal is used for cores and these front member and core material are brazed. CONSTITUTION:A honeycomb structured core 3 made of light allay Al alloy, for example) is held between a front member 1 made of high magnetic permeable metal and a front member 2 made of light alloy Al alloy, for example), and these are connected to each other by brazing to constitute a magnetic shield material 10. In this case, a highly magnetic permeable plate on which light alloy 4 is plated beforehand is used for the front member 1. Thus, the highly magnetic permeable plate 1 is supported by the honeycomb panel 3, as a whole. Since this constitution provides the same effect as that in the case where fine mesh grid-like skeletons are arranged, high strength and out-of-plane rigidity can be given to the magnetism shield material itself without employing reinforcing skeletons.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic shield structure for a magnetically levitated vehicle, and more particularly to a magnetic shield structure for a magnetically levitated vehicle suitable when a magnetic shield material is used as a strength member for a vehicle body. It is a thing.

[0002]

2. Description of the Related Art In recent years, magnetic levitation vehicles have been developed in which a vehicle body is levitated by magnetism to travel. By the way, in the magnetically levitated vehicle, strong magnetic force is used for the levitating means, the traveling drive means, etc., so that there is a concern that the lines of magnetic force may affect the interior of the vehicle. Therefore, Japanese Patent Laid-Open No. 1-2786
As shown in Japanese Unexamined Patent Publication No. 02-242, there has been considered a method of installing a magnetic shield material on the inner wall of the vehicle body to suppress the influence of the magnetic force lines.

As a magnetic shield material up to now, a metal plate having a high magnetic permeability such as pure iron is used, and the metal plate is used in combination with a frame as a stiffening material.

[0004]

In the above-mentioned structure, some of the metal plates have a property of lowering the magnetic permeability when an external force is applied and strain occurs, and such a metal plate is a vehicle. It was difficult to use as a strength member that bears a part of the vehicle body strength. Further, in order to suppress the strain generation of the metal plate, when the structure combined with the stiffening material is used, it is necessary to make the lattice of the frame fine in order to obtain sufficient strength, which causes a problem that the weight is heavy. .

It is an object of the present invention to be lightweight, have sufficient strength and out-of-plane rigidity to be used as a strength member for a vehicle body,
Another object of the present invention is to provide a magnetic shield structure for a magnetically levitated vehicle in which the decrease in magnetic permeability due to strain is small.

[0006]

In order to achieve the above object, the present invention uses a honeycomb panel as a magnetic shield material, and at least one of the two surface materials of the honeycomb panel has a high magnetic permeability. It is characterized in that the other surface material made of a light alloy and the honeycomb core material are mutually joined by brazing using a metal plate.

Another feature is that, in order to facilitate the brazing of the high magnetic permeability metal plate and the light alloy material, the surface material is a plate prepared by plating the surface of the high magnetic permeability metal plate with the light alloy material in advance. I used it.

Another feature is that in order to facilitate brazing of the high magnetic permeability metal plate and the light alloy material, a clad material of the high magnetic permeability metal plate and the light alloy plate is used as the surface material. is there.

[0009]

The magnetic shield material is constituted by a panel in which a high-permeability metal plate, a pair of surface materials made of a light alloy material, and a core material having a honeycomb structure are respectively joined by brazing. As a result, the high-permeability metal plate is entirely supported by the honeycomb panel, and the same effect as in the case of arranging a lattice-like frame with a fine mesh is obtained, so that a magnetic frame is used without using a stiffening frame. -The rudder material itself can have high strength and out-of-plane rigidity, and can be made lightweight.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
Will be described. First, in FIG. 1, 1 is a surface material made of a high-permeability metal, 2 is a surface material made of a light alloy (for example, Al alloy), 3 is a core material of a honeycomb structure made of a light alloy (for example, Al alloy), These are joined to each other by brazing to form a panel, which constitutes the magnetic shield material 10.

Next, the structure of the joint between the surface materials 1 and 2 and the honeycomb core material 3 will be described with reference to FIG. As the surface material 1, a plate obtained by plating the surface of the high-permeability metal plate 1 with the light alloy material 4 in advance is used, and this plate and the core material 3 and the surface material 2 and the core material 3 are connected to each other by brazing. To form the magnetic shield material 10.

Alternatively, as shown in FIG. 3, a clad material composed of a high-permeability metal plate 1 and a light alloy plate 5 may be used as the surface material 1.

With this structure, the panel forming the magnetic shield material 10 has a honeycomb structure, and the high-permeability metal plate 1 is entirely supported by the honeycomb core material 3. As a result, the same effect as when arranging a lattice-like frame with a fine mesh as the reinforcing material is obtained, and the deflection due to the pressure load of the high-permeability metal plate can be suppressed to a small level, so that the magnetic performance is deteriorated due to the strain. can avoid.

Further, since the honeycomb structural material has higher bending rigidity and shearing rigidity than a flat plate having the same mass, the rigidity of the magnetic shield material itself can be increased, and the same rigidity can be obtained by combining the flat plate and the frame. The weight can be reduced compared to the case of holding it.

According to the conventional method, the adhesive is peeled off when the high-permeability metal plate and the core material are bonded by an adhesive, or the high-permeability metal plate 1 and the clad material 5 are fastened with bolts, rivets or the like. Problems such as stress concentration around the fastening members and leakage of magnetic flux from bolts and rivet holes have occurred when they are joined by members. According to the present invention, since the high-permeability metal plate 1 and the core material 3 are joined by brazing, such a problem can be avoided. When it is difficult to directly braze the high-permeability metal plate 1 and the core material 3 made of a light alloy, the surface of the high-permeability metal plate is preliminarily plated with a light alloy material, or the high magnetic permeability is high. Brazing can be easily performed by using a clad material of metal and light alloy. Here, the high-permeability metal means, for example, pure iron or a powder.
It is a metal material having a high magnetic permeability such as malloy and amorphous alloy.

FIG. 4 shows an example in which the magnetic shield structure according to the present invention is applied to a vehicle body. The magnetic shield material (10) according to the present invention is attached to the side panel 12 on the outer plate and floor of the vehicle body 11.
And it is incorporated as a floor panel 13 and used as a strength member. As a result, the efficiency is improved and the weight of the vehicle body can be reduced as compared with the case where a magnetic shield plate is separately attached to the inner wall of the vehicle body.

[0017]

As described above, according to the present invention,
It is possible to provide a magnetic shield structure for a magnetic levitation vehicle that is lightweight, has sufficient strength and out-of-plane rigidity for use as a strength member of a vehicle body, and has a small decrease in magnetic permeability due to strain.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic shield structure according to the present invention.

FIG. 2 is a diagram showing an example of a cross section of the magnetic shield structure shown in FIG.

FIG. 3 is a diagram showing another example of a cross section of the magnetic shield structure shown in FIG. 1.

4 is a perspective view of a magnetic levitation vehicle body showing an application example of the magnetic shield structure of FIG. 1. FIG.

[Explanation of symbols]

1 ... High-permeability metal plate, 2 ... Light alloy plate, 3 ... Honeycomb core material, 4 ... Light alloy material, 5 ... Light alloy plate, 6 ... Stiffening frame, 10
... Magnetic shield structure, 11 ... Magnetic levitation vehicle body, 12 ...
Side panel, 13 ... Floor panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kentaro Masai, Higashitoyoi, Higashitoyoi, Shimomatsu, Yamaguchi Prefecture, 794, inside the Kasado Plant, Hiritsu Manufacturing Co., Ltd. (72) Hitoshi Nagaoka, 794, Higashitoyoi, Higamatsu, Hitachi, Ltd. Co., Ltd. (72) Inventor Morinari 794, Higashitoyo, Higashitoyo, Shimomatsu, Yamaguchi Prefecture, inside Kasato Plant, Hiritsu Manufacturing Co., Ltd. 72) Inventor Kazuhiro Igarashi, 1-4-1, Mei Station, Nakamura-ku, Aichi Prefecture, Tokai Passenger Railway Co., Ltd. (72) Inoue Shiro Hosaka, 1-4, Mei Station, Nakamura-ku, Nagoya, Aichi Prefecture Tokai Passenger Railway Within the corporation

Claims (4)

[Claims] 1. A magnetic shield structure arranged between an interior space of a vehicle and a magnetism generating part, wherein at least one of the two surface materials is made of a high-permeability metal plate and the other is made of a light alloy material. A magnetic shield structure for a magnetic levitation vehicle, characterized in that a honeycomb structure of a light alloy material is used as a material, and the surface material and the core material are constituted by panels which are mutually joined by brazing. 2. The magnetic shield structure for a magnetically levitated vehicle according to claim 1, wherein at least one of the two surface materials is:
A magnetic shield structure for a magnetic levitation vehicle, characterized in that a high-permeability metal plate is preliminarily plated with a light alloy material. 3. The magnetic shield structure for a magnetically levitated vehicle according to claim 1, wherein at least one of the two surface members comprises:
A magnetic shield structure for a magnetic levitation vehicle, characterized by using a clad material of a high-permeability metal plate and a light alloy plate. 4. A magnetically levitated vehicle using the magnetic shield structure according to claim 1 as a side panel and a floor panel of a vehicle body.