JPH09195410A - Magnetic shielding external wall material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic shielding external wall material which is excellent in anticorrosive performance, magnetic shielding performance and strength by sealing plural multilayer electromagnetic steel plate panels at intervals inside two enclosing materials arranged at intervals in parallel to each other. SOLUTION: Two enclosing materials 2 and 2 composed of a steel plate are arranged at prescribed intervals in parallel to each other, and plural multilayer electromagnetic steel plate panels 3... are sealed at intervals in parallel to the enclosing materials 2 inside of them. Core materials 7 and 7 such as asbestos and polyurethane are filled in a cavity between the enclosing materials 2. These multilayer electromagnetic steel plate panels 3 are constituted by layering nondirectional electromagnetic steel plates 4 and 4 and plural directional electromagnetic steel plates 5, 5, 6 and 6 which are easily magnetized and whose shaft directions are different from each other. Therefore, desired thickness and mechanical strength can be easily given to a magnetic shielding external wall material 1, and anticorrosive performance and magnetic shielding performance can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall material for a magnetic shield in a structure requiring shielding of a magnetic field such as an outdoor substation.

[0002]

2. Description of the Related Art Recently, with the progress of OA, the magnetic fields used by these devices have become large, while the operating room, test room, human body, etc. have been protected from the magnetic fields, and the magnetic interference between electronic devices has prevented them. To prevent this, a magnetic shield material is used for the wall material of the construction.

Conventionally, magnetic steel sheets, amorphous steel sheets, pure iron thick sheets, permalloys, etc. have been used as magnetic shield materials. However, among them, there is a problem that the magnetic shield material is heavy, expensive, and difficult to construct except the magnetic steel sheet.

On the other hand, in the case of using an electromagnetic steel sheet, there is known an example in which a plurality of non-oriented electrical steel sheets and grain-oriented electrical steel sheets are laminated and used as a panel structure in order to increase the effective magnetic permeability (special feature: However, since this known magnetic shield panel has a problem of corrosion resistance, there is a problem that it cannot be used outdoors, for example, as a wall material.

In addition, as a wall material, structural strength cannot be obtained by using only one panel formed by laminating the above electromagnetic steel sheets, and of course sufficient shield performance cannot be obtained. was there.

[0006]

When the conventional magnetic shield material is used as an outer wall material of a structure, the conventional magnetic shield material has problems in corrosion resistance, magnetic shield performance, structural strength, etc., as described above. There was a problem that the effect could not be achieved.

The present invention solves the above-mentioned problems, and E generated from electric equipment and electronic equipment installed in the room of the building
From LF band (30Hz to 3kHz) to VLF band (3kHz to 30kHz)
It is an object of the present invention to provide an outer wall material for a magnetic shield that efficiently shields leakage magnetism in a frequency band from low frequency to high frequency range of z).

[0008]

In order to solve the above-mentioned problems, the outer wall material for a magnetic shield according to the present invention has two exterior materials made of steel plates arranged in parallel at a predetermined interval. A plurality of laminated electromagnetic steel sheet panels formed by laminating a plurality of electromagnetic steel sheets are enclosed inside the outer casing material in parallel with the outer casing material at intervals, and between the two outer casing materials, rock wool, polyurethane, etc. It is configured by filling a core material. The laminated electromagnetic steel sheet panel may be formed by laminating a non-oriented electrical steel sheet and a grain-oriented electrical steel sheet. Further, the laminated electromagnetic steel sheet panel may be configured by laminating a non-oriented electrical steel sheet and a plurality of grain-oriented electrical steel sheets having different directions of the easy magnetic field axis.

[0009]

According to the present invention, the magnetic shield outer wall material has a predetermined thickness and mechanical strength, and can reliably shield the magnetic field by the plurality of laminated electromagnetic steel sheet panels.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cutaway perspective view of an outer wall material 1 for a magnetic shield according to the present invention, and FIG. 2 is a vertical sectional view. As shown in each drawing, in this magnetic shield outer wall material 1, two exterior materials 2 are arranged in parallel with each other with a required wall thickness L. This exterior material has a thickness of 0.5 mm, for example.
It is composed of a steel plate having excellent corrosion resistance and mechanical strength such as a color steel plate.

A plurality of laminated electromagnetic steel sheet panels 3 are inserted between the two exterior materials 2 in parallel with the exterior material 2 at a predetermined interval. This laminated electromagnetic steel sheet panel 3 may be formed by laminating a plurality of grain-oriented electrical steel sheets and non-oriented electrical steel sheets, or a plurality of sheets may be formed by making the rolling directions having the easy magnetization axis <100> orthogonal to each other. It may be configured by laminating a plurality of grain-oriented electrical steel sheets, and the combination pattern of these and the number of laminated layers are arbitrary.

In the case of the laminated electromagnetic steel sheet panel 3 of the illustrated example, 1
Two non-oriented electrical steel sheets 4 and two grain-oriented electrical steel sheets 5 and 6 laminated so that the rolling directions having easy magnetization axes intersect.
3 are laminated in total, and the laminated electromagnetic steel sheet panel 3 is inserted in parallel between the pair of exterior materials 2 with a gap.

Further, a core material 7 made of rock wool, polyurethane or the like is filled in the space between the pair of exterior materials 2. By filling the voids with the core material 7, the heat insulating properties and sound insulation properties of the magnetic shield outer wall material 1 are improved, and the mechanical strength is improved. Furthermore, the laminated electromagnetic steel sheet panel 3 has core materials 7 on both sides thereof. The predetermined arrangement is maintained between the exterior materials 2 by being supported by.
It is advisable that the joint surface of the core material 7, each exterior material 2, and the laminated electromagnetic steel sheet panel 3 be fixed by an adhesive.

In the laminated electromagnetic steel sheet panel 3 having the above-mentioned structure, the grain-oriented electrical steel sheets 5 and 6 having a large magnetic domain structure show effective shielding properties against a magnetic field having a frequency of 1 kHz or less, and the magnetic domain structure has a fine structure. Since the grain-oriented electrical steel sheet effectively shields against a magnetic field having a frequency of 1 kHz or more, the laminated electrical steel sheet of the illustrated example which is a combination of these grain-oriented electrical steel sheets 5 and 6 and the non-oriented electrical steel sheet 4. Panel 3 shows that from ELF band (30Hz to 3kHz) to VLF band (3
Good shielding characteristics can be obtained in a low to high frequency range of (kHz to 30 kHz). Furthermore, by inserting a plurality of laminated electromagnetic steel sheet panels 3 between the exterior materials 2, the shielding performance is further improved.

[0015]

As described above, according to the present invention, two exterior materials made of steel sheets are arranged in parallel at a predetermined interval, and a plurality of electromagnetic steel sheets are laminated inside the two exterior materials. Since a plurality of laminated electromagnetic steel sheet panels made up of the above are enclosed in parallel with the exterior material at intervals, and the void between the two exterior materials is filled with a core material such as rock wool or polyurethane, the magnetic shield is formed. It is easy to give a desired thickness and mechanical strength to the outer wall material for a magnetic field, and moreover, this outer wall material for a magnetic shield is
It has an effect of being excellent in magnetic shield performance in a low frequency region to a high frequency region, and is useful as an outer wall material of a structure requiring a magnetic shield.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an outer wall material for a magnetic shield according to an embodiment of the present invention.

FIG. 2 is a partially enlarged vertical sectional view of the magnetic shield outer wall material of FIG.

[Explanation of symbols]

 1 Outer wall material for magnetic shield 2 Exterior material 3 Laminated electromagnetic steel sheet panel 4 Non-oriented electrical steel sheet 5 Directional electrical steel sheet 6 Directional electrical steel sheet 7 Core material

Claims (3)

[Claims] 1. A laminated electromagnetic steel sheet panel formed by stacking a plurality of electromagnetic steel sheets inside the two exterior materials, wherein two exterior materials made of steel plates are arranged in parallel at a predetermined interval. An outer wall material for a magnetic shield, characterized in that a plurality of outer wall materials are opened and enclosed in parallel with each other, and a void between two outer materials is filled with a core material such as rock wool or polyurethane. 2. The outer wall material for a magnetic shield according to claim 1, wherein the laminated electromagnetic steel sheet panel is formed by laminating a non-oriented electrical steel sheet and a grain-oriented electrical steel sheet. 3. The laminated electromagnetic steel sheet panel is formed by laminating a non-oriented electrical steel sheet and a plurality of grain-oriented electrical steel sheets having different directions of easy axes of magnetization. The outer wall material for magnetic shield according to 1.