JPH088578A - Simplified shield room - Google Patents

Abstract

PURPOSE:To provide a simplified shield room which can shield electromagnetic wave noise from the outside, can easily be assembled and disassembled, and is suitably used at the time of measuring weak signals in the open air on the non-permanent basis, etc. CONSTITUTION:A simplified shield room 1 is formed of a shield sheet obtained by putting a woven fabric for shielding electromagnetic waves (shield mesh) between transparent ethylene propylene rubber sheets and can be easily assembled or disassembled when plastic zippers 6 are zipped up or unzipped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple shielded room that shields external electromagnetic noise, and is particularly suitable for use in electric measurements of electric equipment installed outdoors, which is temporarily installed outdoors. Regarding the shield room.

[0002]

2. Description of the Related Art In recent years, with the increasing precision of electronic equipment, the influence of extraneous electromagnetic noise cannot be ignored, especially in devices that handle weak signals. For this reason, various countermeasures against electromagnetic noise are applied to measuring instruments and the like. In addition, when measuring weak signals, a measuring instrument is installed in a shielded room with electromagnetic shielding measures to avoid the influence of external electromagnetic noise.

[0003]

However, the conventional shielded room requires a large-scale construction work,
For example, there is a problem in that it is difficult to apply it when temporarily measuring a weak signal in the field or the like.

The present invention has been made in view of the above problems, and is capable of blocking external electromagnetic noise, easy to assemble and disassemble, and temporarily measuring weak signals in the field. It is an object of the present invention to provide a simple shielded room suitable for.

[0005]

A simple shield room according to the present invention is provided with a shield room base material formed by a shield sheet formed by sandwiching an electromagnetic wave shielding woven cloth between insulating sheets, and the shield room base material. A non-metal fastener capable of forming an electromagnetically closed space by assembling the shield room base material in a room shape by tightening.

[0006]

In the present invention, the shield room base material is formed of a shield sheet in which an electromagnetic wave shielding woven cloth (hereinafter referred to as a shield mesh) is sandwiched between insulating sheets, and the shield room base material is provided. A room-shaped electromagnetic closed space is formed by tightening the fastener. That is, the simple shield room according to the present invention can be extremely easily assembled and disassembled by opening and closing the fastener, and does not require large-scale construction for installing the shield room. Moreover, since the simple shielded room according to the present invention is composed of a relatively lightweight member, it has excellent portability.

In this case, if a metal fastener is used as the fastener, there is a risk of causing an internal accident when the high-voltage power-applying device or the like is measured in the shield room. Therefore, the fastener needs to be made of non-metal (insulator).

If a transparent EP (ethylene propylene) rubber sheet is used as the insulating sheet, electrical insulation can be obtained, and external light can pass through the shield sheet and enter the shield room. There is no need for lighting equipment inside.

Further, in order to reliably prevent external electromagnetic noise from entering from the fastener connecting portion, the fastener connecting portion is preferably provided with an overlapping portion of the shield sheet with a width of 100 mm or more.

[0010]

Embodiments of the present invention will now be described with reference to the accompanying drawings. 1 is a perspective view showing a simple shield room according to an embodiment of the present invention, FIG. 2 is a view showing a state in which the simple shield room 1 is similarly developed, and FIG. 3 is a perspective view showing a shield sheet. The shield sheet 5 is composed of a shield mesh 2 and an insulating sheet 3 sandwiching the shield mesh 2 from both sides thereof. The shield mesh 2 has, for example, a diameter of 0.1 to 0.
2mm annealed copper wire to non-metallic fiber woven cloth 1.5-2.0
It is arranged at a mesh pitch of mm. The insulating sheet 3 is a transparent EP rubber sheet having a thickness of 2 to 5 mm.

The shield room base material 10 is formed by the shield sheet 5 into the shape shown in FIG. That is, the shield room base material 10 has a rectangular ceiling portion 11,
Rectangular side wall portion 12 connected to each side of the ceiling portion 11
And a connecting portion between the ceiling portion 11 and each side wall portion 12 is bendable. Further, a fastener 6 made of plastic (for example, nylon) is attached to both edges of each side wall portion 12, and the adjacent side wall portions 12 can be connected by the fastener 6. When these fasteners 6 are tightened and the side wall portions 12 are connected to each other, the shield room base material 10 can be assembled into a rectangular parallelepiped room shape as shown in FIG. When assembling the simple shield room 1 according to the present embodiment, first, a frame body is assembled into a rectangular parallelepiped shape by, for example, an insulating pipe, and the ceiling of the shield room base material 10 shown in FIG. 2 is mounted on the frame body. Part 11
Is placed and the side wall portion 12 is hung down. Then, the adjacent side wall portions 12 are connected by the fastener 6.

In this case, as shown in FIG. 4, the fastener 6 is attached to the edge of one side wall 12, and the fastener 6 is separated from the edge of the other side wall 12 by a predetermined distance. It is attached to the fastener attachment portion 12a provided at a different position. Then, when the fastener 6 is tightened to connect the adjacent side wall portions, the overlapping portion of the shield sheet having the width W of 100 mm or more is provided at the connecting portion by the fastener 6. In this way, by connecting the side wall portions 12 with the fastener 6, the rectangular parallelepiped room-shaped electromagnetic closed space shown in FIG. 1 is obtained.

The simple shielded room according to this embodiment has, for example, a frontage of 1.5 m, a depth of 2.0 m and a height of 2.
The length is 0 m, and you can open and close the zipper to enter and exit the shield room. In the simple shielded room according to the present invention, the electromagnetically closed space surrounded by the shield mesh is obtained, so that the external electromagnetic wave noise can be blocked or significantly reduced. For example, as a shield mesh, a tin-plated annealed copper wire having a diameter of 0.14 mm and a synthetic fiber are 1.5 m.
1GH when using a plain weave cloth with a pitch of m
It is possible to reduce external electromagnetic noise up to z to -40 dB or less.

In this embodiment, since the shield room can be assembled and disassembled very easily by opening and closing the fastener, it is extremely suitable when the shield room is temporarily needed in the field. For example, when detecting a partial discharge at the connection portion of the power cable, only the power cable connection portion and the portion in the vicinity thereof are arranged in the shield room, and the measurement can be performed with the power cable being led out from the shield room. .

Further, in this embodiment, since the shield sheet is formed of the shield mesh and the transparent EP rubber sheet, external light enters the shield room,
There is also an advantage that there is no need to provide lighting equipment in the shield room.

Further, in this embodiment, the shielded room base material is lightweight and can be folded, so that there is an advantage that it is easy to carry.

Although the simple shielded room has a rectangular parallelepiped shape after being assembled in this embodiment, it may have a dome shape as shown in FIG. 5, and the shape of the shielded room is limited. Not something.
Further, as the shield mesh, in addition to the woven fabric in which the annealed copper wire is woven as described above, a woven fabric formed by using a thin metal wire as a woven thread and a fiber by coating a metal film on the surface as a woven thread are used. Woven cloth or the like can be used.

[0018]

As described above, the simple shielded room according to the present invention can be extremely easily assembled and disassembled by opening and closing the fastener, and is very suitable as a shielded room temporarily installed outdoors.

[Brief description of drawings]

FIG. 1 is a perspective view showing a simple shielded room according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the simple shielded room is also developed.

FIG. 3 is a perspective view showing a shield sheet.

FIG. 4 is a schematic view showing a connecting portion by a fastener.

FIG. 5 is a perspective view showing another shape of the simple shield room.

[Explanation of symbols]

 1; Simple Shield Room 2; Shield Mesh 3; Insulating Sheet 5; Shield Sheet 6; Fastener 10; Shield Room Base Material 11; Ceiling 12; Sidewall

Claims (3)

[Claims] 1. A shield room base material formed by a shield sheet in which an electromagnetic wave shielding woven cloth is sandwiched between insulating sheets, and the shield room base material is assembled in a room shape by tightening the shield room base material. And a non-metal fastener capable of forming an electromagnetically closed space. 2. The simple shielded room according to claim 1, wherein the insulating sheet is a transparent ethylene propylene rubber sheet. 3. The overlapping portion of the shield sheet having a width of 100 mm or more is provided at the fastener connecting portion when the shield base material is assembled in a room shape by the fastener. Simple shield room.