JPH10140703A - Electromagnetic shielding building with improved penetration shielding performance - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent deterioration of an electromagnetic shielding layer against vibration, impact, and the like in a penetrating part such as a beam, a wall, a floor, or a ceiling. SOLUTION: In an electromagnetic shielding building which forms an electromagnetic shielding space by forming an electromagnetic shielding layer on a beam, a wall, a floor, a ceiling or the like using an electromagnetic shielding material, a beam 5 or a wall 6 on which the electromagnetic shielding layer is formed. ,
For the penetration part where duct 1 and piping penetrate the floor, ceiling, etc.
The penetrating duct 1 and pipes are covered with an electromagnetic shielding honeycomb structure 2 and an electromagnetic shielding material made of a steel sleeve, and a flexible electromagnetic material such as a wire mesh or a nonwoven fabric is provided between the electromagnetic shielding material 2 and the electromagnetic shielding layer. Connected by a connection processing unit 4 made of a shielding material,
The connection processing unit 4 closes a gap between the opening of the penetrating portion and the penetrating duct 1 or pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic shielding material which forms an electromagnetic shielding space by forming an electromagnetic shielding layer on beams, walls, floors, ceilings and the like using an electromagnetic shielding material. Concerning shielding buildings.

[0002]

2. Description of the Related Art When a radio communication system using radio waves is adopted, regulations of the Radio Law regarding the used frequency band pose a problem. Therefore, in order to freely select and set the frequency band to use and adopt a unique wireless communication method without being restricted by the Radio Law, the space inside the building was electromagnetically shielded from the outside. Construction of an electromagnetic shielding building is indispensable. The applicant has already disclosed such an electromagnetic shielding building, for example, in Japanese Patent Publication No. 6-99972 and Japanese Patent Publication No.
Japanese Patent Publication No. 9973, Japanese Patent Publication No. 7-16118, and Japanese Patent Publication No. 6-76706 propose a shielding structure of a building frame and an outer wall. Japanese Patent Publication No. Hei 6-13822 discloses a structure for shielding the entrance and exit of a building.
407, Japanese Patent Publication No. 5-79790, Japanese Patent Publication No. 3
Japanese Patent Application Laid-Open No. 58557/1999 proposes a shielding structure for a window opening. Further, Japanese Patent Publication No. 3-62320, Japanese Patent Publication No. 3-45772, Japanese Patent Publication No. 3-62318, and Japanese Patent Publication No. 5-34159 propose a ceiling and a shielding structure for each layer.

FIG. 5 is a diagram showing an outline of the configuration of an electromagnetic shielding building.
FIG. 6 is a diagram for explaining electromagnetic shielding of a duct passing through a wall, FIG. 7 is a diagram for explaining electromagnetic shielding of a pipe passing through a wall, 30 is a window, 40 and 41 are walls, and 42 is a wall. A wall panel, 43 indicates an electromagnetic shielding layer, 44 indicates a duct, 46 indicates an electromagnetic shielding honeycomb structure, 50 indicates a ceiling, and 60 indicates a floor. In FIG. 5, a wall 40 is, for example, a metal mesh, a metal foil (film), a non-woven fabric, a sheet using conductive fibers, or the like, or a conductive paint applied to form an electromagnetic shielding layer on the inner wall of the body. Alternatively, a board having such an electromagnetic shielding layer formed on one side is used. Ceiling 50, floor 60
Also, the same construction as the wall 40 is performed, or a panel to which an electromagnetic shielding material is attached is used. The window 30 is formed by forming an electromagnetic shielding film on one or both sides of the window glass by using an electromagnetic shielding material in the same manner as described above, and connecting the electromagnetic shielding film to a sash frame to form an electromagnetic shielding layer on the wall 40 and the window 30. Are electrically connected integrally. When a duct penetrates a wall, even if the duct itself is made of metal and has electromagnetic shielding performance, radio waves leak through an air outlet or a suction port in a room. The electromagnetic shielding honeycomb structure 45 is disposed in the duct 44 penetrating the wall 41 as described above. Similarly, when air-conditioning pipes, water supply pipes, drain pipes, and power / communication cable pipes penetrate the electromagnetic shielding wall, radio wave leakage occurs through gaps in the through holes and the electromagnetic shielding performance does not deteriorate. It is necessary to do so. In such a case, conventionally, as shown in FIG. 7, a penetration sleep 47 having a predetermined length is disposed at a portion where the penetration pipe 46 penetrates the electromagnetic shielding wall including the wall 41, the wall panel 42, and the electromagnetic shielding layer 43, The space between the shielding layer 43 and the shielding layer 43 is closed by metal brazing at a brazing portion 48, and
The radio wave is attenuated in the length direction of 7.

As seen in the above proposals, electromagnetically shielded buildings use an electromagnetically shielding material for a frame or a wall structure, and also use an electromagnetically shielding material for windows, entrances, and other openings along the outer wall of the building. By covering the entire surface with an electromagnetic shielding material,
The space inside the building can be configured as one electromagnetic shielding space independent from the outside. In addition, the interior of the building is not limited to one electromagnetic shielding space, but each floor is separated by an electromagnetic shielding material on the upper and lower ceilings and floors, or by partitioning walls between rooms on each floor with an electromagnetic shielding material. Alternatively, a plurality of independent electromagnetic shielding spaces can be formed for each room.

[0005]

However, when the duct penetrates the wall, the electromagnetic shielding honeycomb structure 45 is arranged in the duct 44 as in the conventional example shown in FIG. However, when higher electromagnetic shielding performance is required, the desired electromagnetic shielding performance cannot be achieved because radio wave leakage occurs in the gap formed in the penetrating portion. Occurs. Further, when the pipe penetrates the electromagnetic shielding wall, as in the conventional example shown in FIG.
Although high electromagnetic shielding performance can be achieved by closing the gap between the electromagnetic shielding layer 43 and the electromagnetic shielding layer 43, when the electromagnetic shielding wall is vibrated due to an earthquake or the like, the brazing is performed due to metal brazing. There is a problem in that brazing or peeling, cracking, or damage of the electromagnetic shielding layer 43 occurs near the portion 48.
In particular, the electromagnetic shielding layer 43 for the penetration sleep 47 and the brazing portion 48 is made of a thin film or surface by a metal mesh, a metal foil (film), a non-woven fabric, or a sheet using conductive fibers as described above. Therefore, it is weak in strength against a vertical force on the layer against vibration and impact, and the electromagnetic shielding performance is significantly deteriorated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to prevent the electromagnetic shielding layer from being deteriorated against vibration, impact, and the like in a penetrating portion such as a beam, a wall, a floor, or a ceiling. It is to prevent.

[0007] Therefore, the present invention provides an electromagnetic shielding building that forms an electromagnetic shielding space by forming an electromagnetic shielding layer on beams, walls, floors, ceilings and the like using an electromagnetic shielding material. For a penetration part through which a duct or piping penetrates a beam, a wall, a floor, a ceiling, etc., the penetrating duct or piping is covered with an electromagnetic shielding material, and a flexible space is provided between the electromagnetic shielding material and the electromagnetic shielding layer. The connection is made by a connection processing section made of an electromagnetic shielding material, and the connection processing section closes a gap between the opening of the penetrating section and the duct or pipe penetrating therethrough.

[0008] The electromagnetic shielding material applied to the duct or pipe penetrating may be an electromagnetic shielding honeycomb structure covering the duct opening provided in the vicinity of the penetrating portion, or a steel plate sleeve covering the outer periphery of the duct or pipe penetrating. The connection processing unit has a shielding layer side wire mesh that has a hole for a duct or a pipe that penetrates and is attached to an electromagnetic shielding layer at an opening of the penetration part, and an electromagnetic wave of a duct or a pipe that has a flange at one end and penetrates. A winding-side wire mesh wound around the shielding material, and a cloth-like body wound around the other end of the winding-side wire mesh; and further, an L-shaped steel sheet is stuck along the through-hole opening, and It is characterized in that the shielding layer side wire mesh and the winding side wire mesh are overlapped and screwed together.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of the present invention of a duct penetration part combined with an electromagnetic shielding honeycomb structure, FIG. 2 is a view for explaining an embodiment of a duct penetration part combined with a steel plate sleeve, FIG. 3 is a view for explaining an embodiment of a pipe penetration portion combining a steel plate sleeve. In the figure, 1 and 11 are ducts, 2 is an electromagnetically shielded honeycomb structure, and 3 and 13 are heat insulators, 4 and 14,
24 is a shield connection processing unit, 5 and 15 are beams, 6 and 26 are walls, 7-1 to 7-4 are steel plates which are electromagnetic shielding materials, 7, 1
7 and 27 are shield layers, 18 and 28 are penetrating sleeves, 2
1 shows a penetration tube.

In FIG. 1, a duct 1 has a heat insulating material 3 wrapped around an outer periphery thereof and penetrates between a beam 5 and a wall 6, and passes through an electromagnetic shielding honeycomb structure 2 to shield an internal opening. Attached to the front of the In the penetrating portion, steel plates 7-1 to 7-4, which are L-shaped electromagnetic shielding members, are overlapped and adhered on the shield layer 7 along the openings of the beam 5 and the wall 6. The shield connection processing unit 4 includes an electromagnetic shielding honeycomb structure 2 attached to a duct in front of the penetration portion, and a steel plate 7-1 which is an L-shaped electromagnetic shielding material adhered along an opening of the beam 5 and the wall 6 of the penetration portion. To 7-4 to close the gap between the through-hole opening and the duct, and a flexible shielding material is used.

The flexible shield material is made of a cloth, a mesh, a wire mesh (lath), or a non-woven fabric made of, for example, an electromagnetic shielding member such as a copper wire, carbon fiber, or conductive fiber. Duct 1 by connection processing unit 4
A flexible shield material is wound in a predetermined length or more in the axial direction, that is, in the direction of the electromagnetic shielding honeycomb structure 2, and the flexible shield material is wound in a certain length or more along the surface of the beam 5 and the wall 6. L
It overlaps with the steel plates 7-1 to 7-4, which are shaped electromagnetic shielding members, and is stopped with screws or the like. In this way, the mounting portion of the electromagnetic shielding honeycomb structure 2 and the mounting portion of the opening surface of the beam 5 and the wall 6 are connected by the flexible shield material, and the heat insulation wound around the outer periphery of the duct 1 is provided. Since the gap between the member 3 and the opening of the beam 5 and the wall 6 can be sufficiently ensured, a fit that can follow the swing of the duct 1 can be realized, and deterioration of the electromagnetic shielding layer can be prevented.

When the duct penetrates the beam, the heat insulating material 1 wound around the outer periphery of the duct 11 as shown in FIG.
3 is further covered with a steel plate penetrating sleeve 18, the penetrating sleeve 18 is extended from the penetrating portion of the wall 26 by a certain length or more, and a shield connection process is performed between the shield layer 17 of the wall 26 and the penetrating sleeve 18. The connection is made by the unit 14. Similarly, in the case where the pipe penetrates a wall, a beam, or a floor, for example, as shown in FIG. 3, the outer periphery of the penetrating pipe 21 is covered with a penetrating sleeve 28 made of a steel plate. Then, the shield connection processing section 24 connects the shield layer 27 of the wall 26 and the penetrating sleeve 28.

As described above, the frame shield layer 1 for beams, walls, etc.
By connecting between 7, 27 and penetrating sleeves 18, 28 with flexibility by shield connection processing sections 14, 24 made of flexible shielding material, instead of being fixedly connected with something like a steel plate, It can be connected so that it does not break due to shaking during an earthquake or the like.

As the steel plate, for example, an electroplated zinc steel plate of 0.4 mm is used, and the overlap portion is secured to 100 mm or more. For example, a wire mesh (laser) having a size of 4 mm × 8 mm is used, and a double wire mesh is used as necessary. Next, a specific configuration example of the shield connection processing unit will be described. FIG. 4 is a diagram showing a specific configuration example of the shield connection processing unit, and FIG.
Shows an example of a duct penetration part, and (B) shows an example of a pipe penetration part. In the figure, 31, 32, and 38 are wire meshes (lases), 33 is a nonwoven fabric,
34 is a screw, 35 is a through duct, 36 is a through tube, and 37 is a through sleeve.

In FIG. 4, a wire mesh (lath) 31 has a hole through which a through duct 35 and a through tube 36 penetrate in the center, and is fixed to a surface (an electromagnetic shielding layer) of a through portion such as a beam or a wall with a screw or the like. It is a wire mesh on the shielding layer side. The wire mesh (lass) 32 has a flange at one end of a cylindrical shape, and is wound around a through duct 35 and a through pipe 36 at an exit of a through portion such as a beam or a wall.
This is a wrapping-side wire mesh that is fixed to the surface of the penetrating part such as a beam or wall from above with screws or the like. The nonwoven fabric 33 is wound around the other end of the cylindrical wire mesh 32 without the flange. Penetration tube 3
In the case of No. 6, as shown in FIG.
8 may be wound twice, and the wire mesh 32 and the nonwoven fabric 33 may be wound thereon.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, an example of the shield connection processing unit configured by a wire mesh and a nonwoven fabric has been described. However, the shield connection processing unit may be configured by using a cloth using conductive fibers or another flexible electromagnetic shielding material.

[0017]

As is clear from the above description, according to the present invention, a duct or a pipe penetrating a beam, a wall, a floor, a ceiling, etc., on which an electromagnetic shielding layer is formed, through a duct or a pipe penetrating therethrough. The outer periphery of the pipe is covered with an electromagnetic shielding material, and the electromagnetic shielding material and the electromagnetic shielding layer are connected by a connection processing unit made of a flexible electromagnetic shielding material, and the connection processing unit penetrates the opening of the penetration portion. Since the gap between the duct and the pipe is closed, the gap between the opening of the penetrating portion and the duct or the pipe penetrating is closed,
The electromagnetic shielding performance can be prevented from lowering, and the electromagnetic shielding layer can be prevented from deteriorating against vibration, impact, and the like. Further, an L-shaped steel plate is stuck along the opening of the penetration portion,
By superposing the shielding layer side wire netting and the winding side wire netting flange on the shaped steel plate and screwing them together, the electromagnetic shielding layer in the connection processing part can be protected and its deterioration can be prevented.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment of the present invention of a duct penetration portion in which an electromagnetic shielding honeycomb structure is combined.

FIG. 2 is a view for explaining an embodiment of a duct penetration portion in which a steel plate sleeve is combined.

FIG. 3 is a view for explaining an embodiment of a pipe penetration portion combining a steel plate sleeve.

FIG. 4 is a diagram illustrating a specific configuration example of a shield connection processing unit.

FIG. 5 is a diagram showing a configuration outline of an electromagnetic shielding building.

FIG. 6 is a diagram for explaining electromagnetic shielding of a duct penetrating a wall.

FIG. 7 is a diagram for explaining electromagnetic shielding of a pipe penetrating a wall.

[Explanation of symbols]

1, 11 ... duct, 2 ... electromagnetic shielding honeycomb structure, 3,
13 ... heat insulating material, 4, 14, 24 ... shield connection processing part,
5, 15: beam, 6, 26: wall, 7-1 to 7-4: steel plate which is an electromagnetic shielding material, 7, 17, 27: shield layer, 18,
28: penetration sleeve, 21: penetration tube

Continuing on the front page (72) Katsuhiro Kobayashi, 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Koji Nagata 2-3-2, Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Isao Morihiro 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Shigemasa Suematsu 2-3-2 Shibaura, Minato-ku Tokyo, Shimizu Construction Co., Ltd. (72) Invention Katsuhiro Inoue 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Susumu Haneda 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (5)

[Claims] 1. An electromagnetic shielding building in which an electromagnetic shielding layer is formed on a beam, a wall, a floor, a ceiling, or the like using an electromagnetic shielding material to form an electromagnetic shielding space.
For a penetration portion through which a duct or piping penetrates a floor or ceiling, the penetrating duct or piping is covered with an electromagnetic shielding material, and a gap between the electromagnetic shielding material and the electromagnetic shielding layer is made of a flexible electromagnetic shielding material. An electromagnetic shielding building improved in penetration part shielding performance, characterized in that connection is made by a connection processing part, and the connection processing part closes a gap between the opening of the penetration part and the duct or pipe penetrating therethrough. . 2. The penetrating part shielding according to claim 1, wherein the electromagnetic shielding material applied to the duct or pipe penetrating is an electromagnetic shielding honeycomb structure covering a duct opening provided in the vicinity of the penetrating part. An electromagnetic shielding building with improved performance. 3. The improvement of the penetration part shielding performance according to claim 1, wherein the electromagnetic shielding material applied to the penetrating duct or pipe is a steel sleeve covering the outer periphery of the penetrating duct or pipe. The electromagnetic shielding building which aimed at. 4. The connection processing unit includes: a shielding layer side wire mesh having a hole of a duct or a pipe that penetrates and attached to an electromagnetic shielding layer at an opening of the through section; and a duct that has a flange at one end and penetrates; Claims 1 and 2 are provided with a winding-side wire mesh wound around an electromagnetic shielding material of a pipe, and a cloth-like body wound around the other end of the winding-side wire mesh. Electromagnetic shielding building. 5. An L-shaped steel plate is stuck along the through-hole opening, and a shielding layer side wire mesh and a wrapping side wire mesh are overlapped on the L-shaped steel plate and screwed. Item 6. An electromagnetic shielding building in which the penetration part shielding performance according to item 4 is improved.