JPH11103188A - Shielding structure and jointing in technique electromagnetic shielded building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To electromagnetically shield a joint in a structural material and a part, keeping it high in vibration resistance without deteriorating it in durability and to enable an electromagnetically shielded building to easily undergo shielding work for renewal. SOLUTION: Surrounding wall, ceiling, and floor of a building are electromagnetically shielded with electromagnetic shielding material to form an electromagnetically shielded space, wherein a joint between connecting parts 1 and 2 of a structural material and structural part is covered with a plate-like electromagnetic shielding material 5, and a spray coating film 6 of metallic powder is made to cover the electromagnetic shielding material 5 spreading over the structural material and structural part. The electromagnetic shielding material 5 is formed of metallic meshes, plates, tapes, foils or conductive nonwoven cloths and fastened to either the structural material or the structural part of the joint with machine screws.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielding structure and a construction method of a connecting portion in an electromagnetic shielding building which forms an electromagnetic shielding space by electromagnetically shielding surrounding walls, ceilings and floors using an electromagnetic shielding material.

[0002]

2. Description of the Related Art When a radio communication system using radio waves is adopted, regulations of the Radio Law regarding the frequency band to be used become 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,
Japanese Patent Publication No. 99972, Japanese Patent Publication No. 6-99973, 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. 6-33699 and Japanese Patent Publication No. 6-13822, and Japanese Patent Publication No. 6-63407, Japanese Patent Publication No. 5-79790, and Japanese Patent Publication No. 3-58557 disclose window shielding structures at entrances and exits of buildings. A shielding structure for the opening is proposed. Also,
Japanese Patent Publication No. 3-62320, Japanese Patent Publication No. 3-45772, Japanese Patent Publication No. 3-61818, Japanese Patent Publication No. 5-341
No. 59 proposes a shielding structure for each ceiling and each layer.

[0003] FIG. 3 is a diagram showing the outline of the configuration of an electromagnetic shielding building, where 30 is a ceiling, 40 is a wall, 50 is a window, and 60 is a floor. In FIG. 3, a wall 40 is, for example, a metal mesh, a metal foil (film), a nonwoven fabric, or a sheet using a conductive fiber 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 3
The floor 0 and the floor 60 are constructed in the same manner as the wall 40 or using a panel to which an electromagnetic shielding material is attached. Window 5
0 forms an electromagnetic shielding layer on one or both sides of the window glass using an electromagnetic shielding material in the same manner as described above, and connects the electromagnetic shielding layer to the sash frame, thereby forming the electromagnetic shielding layer of the wall 40 and the window 50. They are electrically connected integrally.

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 a single 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.

However, in recent years, with the spread of PHS (Personal Handy Phone System) and other wireless communications, the frequency band of radio waves used has increased to several GHz and the wavelength has become shorter. However, there arises a problem that a desired electromagnetic shielding level cannot be achieved due to a radio wave leaking from a slight gap of the connecting portion in the above. In addition, there is also a problem that the electromagnetic shielding performance is likely to be deteriorated due to shaking such as an earthquake even if a certain processing is performed to cover the gaps at the connection between the structural materials and the parts. Therefore, there is a demand for the construction of an electromagnetic shield that is resistant to shaking and hardly causes deterioration of the electromagnetic shielding performance with respect to the connection between the structural materials and the parts.

In the case of a new construction, it is possible to freely select and adopt any of the above-mentioned technologies. In the case of a renewal, of course, not only the frame is left as it is, but also
It is required that a wall, a ceiling, and a floor can be easily constructed while minimizing the renovation as much as possible, and that a desired electromagnetic shielding level is realized.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and realizes an electromagnetic shield which is resistant to shaking without deteriorating the durability of a connection between structural materials and parts. This allows the construction to be performed easily even in the case of renewal.

Accordingly, the present invention provides an electromagnetic shielding building which forms an electromagnetic shielding space by performing electromagnetic shielding on surrounding walls, ceilings and floors by using an electromagnetic shielding material. Is covered with a plate-shaped electromagnetic shielding material, and is covered with a thermal spray coating of a powdery metal body over the structural material and the portions from above the plate-shaped electromagnetic shielding material. It is.

Further, the plate-shaped electromagnetic shielding material is a metal mesh, plate, tape, foil or conductive non-woven fabric, and only one structural material or part of the connecting portion is fixed with screws. Further, on the floor, a construction for attaching a resin-based protective film is performed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of a shielding structure and a construction method of a connecting portion in an electromagnetic shielding building according to the present invention, wherein 1 is a floor, 2 is a partition wall, 3 and 4 are electromagnetic shielding materials, and 5 is a metal mesh. , 6 indicate a sprayed film.

In FIG. 1, a floor 1 is a floor slab or a floor material disposed thereon, and has an electromagnetic shielding layer made of an electromagnetic shielding material 3 on the upper surface. The partition wall 2 is a wall disposed on the floor 1 so as to partition a room in accordance with the layout design of the floor, and has an electromagnetic shielding layer made of an electromagnetic shielding material 4 on its surface to form an electromagnetic shielding space of the room. Is provided. The metal mesh 5 covers a gap between the electromagnetic shielding layers formed at the butt connection portion between the floor 1 and the partition wall 2 and is fixed with screws. At least one side of the metal mesh 5, for example, the floor 1, can cope with a large swing. It may be fixed with screws only on one side. The thermal spray film 6 is a film formed by spraying a powdery metal body from above the metal mesh 5.

In recent years, a technique of spraying a powdery metal body onto various materials at a low temperature has been adopted as a technique for preventing rust of piping or for other purposes. This metal spraying naturally has an electromagnetic shielding performance because the material is metal, and by adopting this spraying technique, it is used together with a metal mesh as described above for the connection between the structural material and the connection between the parts. Electromagnetic shielding can be reliably performed. In addition, it is suitable for performing electromagnetic shielding work together with other works when renovating an existing building. Since the color of the sprayed film changes depending on the thickness, if a color sample is prepared to manage the thickness of the sprayed film, the film thickness can be controlled by the degree of the color of the sprayed film. Therefore, even when the thickness of the sprayed film is to be controlled in accordance with the required electromagnetic shielding level, it can be easily controlled by the degree of color.

FIG. 2 is a view showing another embodiment of a shielding structure and a construction method of a connecting portion in an electromagnetic shielding building according to the present invention, wherein 11 to 13 are walls, 14 is a flat plate, and 15 is an L-shaped plate. , 16 indicate a sprayed film.

In FIG. 2, walls 11 to 13 are made of a wall material for partitioning (partitioning) a general room, and constitute a wall. Walls 11 and 12 are arranged in a straight line and connected.
2 and 13 are bent and connected in an L-shape. These may be wall parts of an existing building. Flat plate 14, L
The mold plate 15 is a metal plate having electromagnetic shielding performance, and has walls 11 to 1 for forming an electromagnetic shielding space.
3 is to close the gap between the connecting portions with the inner surface or the outer surface. The flat plate 14 is used to provide electromagnetic shielding for the connection of the walls 11 and 12 arranged in a plane, and the L-shaped plate 15 is used for providing electromagnetic shielding to the connection at the corner between the walls 12 and 13. To use. The thermal spray film 16 is formed by spraying a powdery metal body at a low temperature from above the flat plate 14 and the L-shaped plate 15 on the inner surface or the outer surface of the walls 11 to 13 to form an electromagnetic shielding space.

Note that the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above-described embodiment, the gap between the connection portions is closed with a metal mesh or plate, and a powdery metal body is further sprayed thereon at a low temperature and covered with a sprayed film. As a plate-shaped electromagnetic shielding material to cover, not only a metal mesh and a plate but also a metal foil, a metal tape, a nonwoven fabric, or the like may be used instead. In addition, the electromagnetic shielding for the connection between structural materials such as walls and floors and between parts may be covered with the sprayed film. In other words, after connecting the connecting parts between the structural materials and the parts with a plate-shaped electromagnetic shielding material, a powdery metal body is sprayed at low temperature on the wall, ceiling, and floor from above, and the whole is spray-coated. It may be covered. Further, unlike floors and ceilings, it is necessary to protect the sprayed film against people and trolleys. Is also good.

[0016]

As is apparent from the above description, according to the present invention, the gap between the connecting portions between the structural materials and between the parts is covered with the plate-like electromagnetic shielding material, and the plate-like electromagnetic shielding material is used. Since the structural material and the parts are covered with a thermal spray coating of a powdered metal body from the top of the material, metal spraying, which is adopted as a rust prevention technology for pipes, is adopted in the electromagnetic shielding method and the structural material and the parts are separated. Can be prevented from lowering the shielding level of the connecting portion. Also,
As a plate-shaped electromagnetic shielding material, a metal mesh, plate, tape, foil or conductive non-woven fabric is used, and only one structural material or part of the connection part is screwed and fixed, so that the electromagnetic shielding performance due to shaking is improved. Can prevent decline,
The quality of the shielding structure can be improved. Further, since the powdery metal body is sprayed at a low temperature, the construction is easy and the renewal can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a shielding structure and a construction method of a connecting portion in an electromagnetic shielding building according to the present invention.

FIG. 2 is a view showing another embodiment of a shielding structure and a construction method of a connection part in an electromagnetic shielding building according to the present invention.

FIG. 3 is a diagram showing a schematic configuration of an electromagnetic shielding building.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Floor, 2 ... Partition wall, 3, 4 ... Electromagnetic shielding material, 5 ... Metal mesh, 6 ... Thermal spray film

Claims (5)

[Claims] 1. An electromagnetic shielding building that forms an electromagnetic shielding space by performing electromagnetic shielding on surrounding walls, a ceiling, and a floor using an electromagnetic shielding material, wherein a gap between connection parts between structural materials and parts is formed in a plate shape. A connection in an electromagnetically shielded building, wherein the electromagnetically shielded material is covered with an electromagnetically shielded material, and is covered with a sprayed film of a powdery metal body over the plate-shaped electromagnetically shielded material and between the structural materials and portions. Part shielding structure. 2. The shielding structure of a connection part in an electromagnetic shielding building according to claim 1, wherein the plate-shaped electromagnetic shielding material is a metal mesh, plate, tape, foil, or conductive nonwoven fabric. . 3. The shielding structure of a connecting part in an electromagnetic shielding building, wherein the plate-shaped electromagnetic shielding material is fixed by screwing only one structural material or part of the connecting part. 4. In an electromagnetically shielded building that forms an electromagnetically shielded space by performing electromagnetically shielded surrounding walls, a ceiling, and a floor using an electromagnetically shielded material, a gap between connection parts between structural materials and between parts is formed in a plate shape. A method of shielding a connection part in an electromagnetically shielded building, comprising: covering the plate-like electromagnetic shield with an electromagnetic shielding material; 5. A method for constructing a connecting part in an electromagnetic shielding building, wherein after the powdery metal body is thermally sprayed, a construction for applying a resin-based protective film is further performed on a floor.