JPH0946083A - Simplified shield room and its extension method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simplified shield room which shields electromagnetic wave generated at the time of an electrostatic discharge inspection, is simply constructed in a desired place, can be extended in accordance with the size of an equipment to be inspected, and is easy to transport. SOLUTION: The simplified shield room has the structure wherein a construction pillar 10 is constructed by using a pipe made of light metal, and the outer part of the pillar 10 is covered with a mesh sheet 3 composed of conductive fiber cloth. The size of the pillar 10 can be changed by additionally connecting a pipe made of light metal via an intermediate connection joint 8. Extension of size is enabled also by additionally linking the mesh sheet 3 in accordance with the size of the pillar, with a conductive velcro tape or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple shield room for shielding electromagnetic waves generated by an electrostatic discharge test, and more particularly, a simple shield room capable of expanding a shield space so as to correspond to the size of a device under test and its expanding method. Regarding

[0002]

2. Description of the Related Art Conventionally, an electrostatic discharge test is performed away from an anechoic chamber and peripheral devices susceptible to interference in order to shield electromagnetic waves generated during this test and to prevent interference from electromagnetic waves from the outside. I was going to a place. Therefore, every time this test is performed, the equipment under test is moved in from the production line or evaluation room, and the test equipment is installed. After the test, they are moved to their original locations.

[0003]

SUMMARY OF THE INVENTION Like the conventional method,
In order to perform an electrostatic discharge test in a place independent of the production line and evaluation room, such as an anechoic chamber, the device under test must be carried in and out each time. Also, equipment such as an anechoic chamber is expensive and cannot be easily installed and installed, and it is difficult to own multiple equipment. Therefore, even when owned, it is often operated as shared equipment, which makes it difficult to perform an electrostatic discharge test according to the production schedule. In addition, it is necessary to perform wiring connection and function activation of the device under test every movement, which has many drawbacks.

Conventionally, as a shield room which can be easily installed, there is one disclosed in Japanese Utility Model Laid-Open No. 10598/1993 (referred to as Prior Art 1). In the shielded room shown in the prior art 1, four sides of a rectangular parallelepiped are formed by pipes, and a mesh-like sheet is connected thereto by metallized surface fastener tape.

However, since the size of the shield room of the prior art 1 is determined by the length of the pipe forming its side, it is impossible to add a shield space.

Accordingly, one technical object of the present invention is to eliminate such drawbacks and to provide a simple electromagnetic wave shielding shielded room which can be easily transported to a desired place and easily assembled.

Another technical object of the present invention is to provide a simple shield room capable of expanding the shield space of the simple shield room, and a method of expanding the same.

[0008]

According to the present invention, in a shielded room having an electromagnetically shielded space for performing an electrostatic discharge test, a plurality of connection joints and an assembled support column that connects a plurality of light metal rods are provided. , A mesh-like sheet made of a metal fiber woven fabric that can be connected by applying a conductive magic tape to the edge, and by additionally connecting the rod member to the assembly column and additionally connecting the mesh-like sheet A simple shielded room characterized in that the electromagnetically shielded space can be added is provided.

Further, according to the present invention, in the simple shield room, the bar is a linear pipe,
A simple shield room is obtained in which the connection joint includes an intermediate connection joint that connects the pipes to both ends and a corner connection joint that connects the pipes to each other in a vertical direction.

Further, according to the present invention, in the method for expanding the electromagnetically shielded space in the simple shield room, at least one of the sides of the assembly column is connected to the pipe and the intermediate portion connection joint. The method for expanding a simple shielded room is characterized in that the electromagnetically shielded space of the simple shielded room is expanded by additionally extending the meshed sheet to shield the surface increased by the expansion. can get.

That is, the present invention has a structure in which the columns are assembled with light metal pipes and the periphery thereof is covered with the conductive fiber woven mesh sheet. The post is a connection joint, and the size can be changed by additionally connecting a light metal pipe, and the mesh sheet covering the surroundings is also connected to the size of the post by additionally connecting with a conductive magic tape, The size can be increased.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a simple shield room according to an embodiment of the present invention. As shown in FIG. 2, the simple shield room 1 is formed by covering the assembled support column 10 with a mesh sheet 3 made of a metallic fiber woven fabric. The simple shield room 1 is provided with an entrance / exit 2 so that a part of the mesh sheet 3 can be opened for the entrance / exit of an operator. Also, the cable entry port 4 is
After the cable 5 is pulled in, it is fastened with a rubber-like packing so that electromagnetic waves do not leak. The mesh-like sheet 3 made of metallic fiber woven fabric has conductive velcro tapes applied to all the edges, so that each part of the mesh-like sheet 3 can be connected with its ends aligned.

FIG. 2 is a simplified shielded room 1 shown in FIG.
It is a perspective view which shows the structure of the assembly support | pillar 10 of FIG. With reference to FIG. 2, the assembly strut 10 connects the light metal pipes 6 as a plurality of rods, the corner connection joints 7 that form the corners of the assembly strut 10, and the light metal pipes 6 in cascade. And an intermediate connection joint 8. The assembly pillar 10 is
As shown in FIG. 3, screws 6a are provided on both sides of the light metal pipe 6 which is a conductive light metal, and the corner connection joint 7 is of a screw-in type. At the time of assembly, the pipe 6 is screwed and connected to the corner connecting joint 7, and the corner is assembled first as shown in FIG. Next, the intermediate parts are connected by the intermediate part connection joint 8. After the connection, tighten the nut 9 to firmly fix it. In addition, when expanding, intermediate connection joint 8 and light metal pipe 6
It is intended to be expanded by additionally connecting the same type as.

As described above, in this embodiment, the light metal pipe 2 and the end provided with the intermediate connection joint 8 are provided in the shield room which constitutes the electromagnetic shielded space required for electrostatic discharge. It is assembled with a mesh-like sheet 3 made of a connectable metallic fiber woven fabric by applying a conductive magic tape to the edge, and the pipe 2 is additionally connected through the intermediate connection joint, and the mesh-like sheet 3 is also connected. It has a structure that allows additional connections and can expand the electromagnetic shielding space.

[0016]

As described above, according to the present invention, since the shield room can be easily moved and assembled to a desired place, it is not necessary to move the device under test into an anechoic chamber, etc. It is possible to provide a simple shielded room in which problems due to startup are eliminated.

Further, according to the present invention, since the electrostatic discharge test can be easily carried out with inexpensive equipment investment, it is possible to provide a simple shielded room in which the quality and reliability of the device under test can be guaranteed at low cost.

Further, according to the present invention, it is possible to provide, at a low cost, a simple shield room which can add a shield space of the simple shield room having the above-mentioned advantages and a method of adding the same.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an assembly support post that is a framework of the simple shielded room of FIG.

FIG. 3 is a partially enlarged perspective view mainly showing the intermediate portion connection joint of FIG.

4 is a partially enlarged perspective view mainly showing the corner connecting joint of FIG. 2. FIG.

[Explanation of symbols]

 1 Shield room 2 Worker entrance / exit 3 Mesh sheet 4 Cable entry port 5 Cable 6 Light metal pipe 7 Corner connection joint 8 Middle connection joint 9 Nut 10 Assembly post

Claims (3)

[Claims] 1. In a shielded room having an electromagnetically shielded space for performing an electrostatic discharge test, a plurality of connection joints, an assembly support column that connects a plurality of light metal rods, and a conductive magic tape on the edge are applied. , A mesh-like sheet made of connectable metallic fiber woven fabric, and by additionally connecting the rod member to the assembly column and additionally connecting the mesh-like sheet, the electromagnetically shielded space can be expanded. A simple shielded room characterized by being 2. The simple shielded room according to claim 1, wherein the rod is a straight pipe, and the connecting joint is a pipe connecting the pipe to both ends thereof, and the pipe is perpendicular to each other. A simple shielded room characterized by comprising corner connection joints that connect to each other. 3. The method for expanding the electromagnetically shielded space in a simple shielded room according to claim 2, wherein at least one of the sides of the assembly support column is provided with the pipe and the intermediate connection joint. A method for expanding a simple shielded room, wherein the electromagnetically shielded space of the simple shielded room is expanded by additionally connecting the mesh-like sheet and shielding the surface increased by the expansion.