JPH0733693B2 - Method of constructing electromagnetically shielded space - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for constructing an electromagnetically shielded space for performing communication using radio waves in a building.

[Prior Art] When transmitting information between a telephone or a computer in a building,
The wired communication method involves the work of laying cables, which makes it inflexible in changing and expanding the layout.
It has various other problems. In particular, if the amount of communication in a building increases with the progress of office automation in office buildings, the wired communication system will have a limit in securing communication lines.

Therefore, in recent years, there is an increasing tendency to adopt a wireless communication system using radio waves in a building in place of such a wired communication system. When using radio waves inside a building, it is necessary not to emit electromagnetic noise to the outside, and to prevent electromagnetic noise from entering the system from causing it to malfunction or to be subject to radio interference. .

Further, when a computer is used to process high-level information, confidentiality of the information also becomes a problem. In particular, with the improvement of radio wave reception technology, it has become possible to catch information leaking from a computer in a building from the outside with a highly sensitive receiving device. Therefore, there is a problem that confidential information is leaked.

As described above, in order to prevent the adoption of the wireless communication system in the building and the leakage of information from the data processing device to the outside of the building, attention has been paid to, for example, an intelligent building in which the building or a part of the building serves as an electromagnetic shielding zone. There is.

When constructing the electromagnetic shielding zone, generally, for example, a metal foil, a metal net, a conductive paint or other conductive material is used as an electromagnetic shielding material on a floor or a wall. The applicant has already made various proposals regarding the electromagnetic shielding structure of the frame, windows, and entrances regarding the electromagnetic shielding building used as an intelligent building in which a data processing device is installed in the building and a wireless communication system is adopted. .

[Problems to be Solved by the Invention]

However, when forming the electromagnetic shielding zone, there is a problem that if there is a small gap, radio waves leak from the gap and sneak in, and electromagnetic shielding performance is significantly reduced. Therefore, in order to improve the electromagnetic shielding performance, it is necessary to completely cover the surroundings with the electromagnetic shielding material, and the electromagnetic shielding material is used everywhere on floors, walls and other structural members. Therefore, it is inevitable that the cost will be considerably higher than that of an ordinary building.

In addition, even if an electromagnetic shielding material is used for a structural member of a building, in reality, a gap is likely to occur between the floor and columns, walls, etc.,
The electromagnetic shielding performance is degraded in the invisible place.

FIG. 7 is a diagram for explaining a problem in a joint portion between a partition wall and a floor, FIG. 8 is a diagram for explaining a problem in a joint portion between a partition wall and a ceiling, and FIG.
The figure is a figure for demonstrating the problem in the matching part of a floor and an outer wall part. In the figure, 61 and 73 are partition walls, and 62 and
71 is a concrete slab, 63, 76 and 83 are deck plates, 64 is an electromagnetic shielding material, 72 is a stud runner, 74 is a plaster board, 75 and 84 are lava for sprayed ground, 81 is an aluminum curtain wall, and 82 is a glass opening. Indicates a part.

Generally, the performance required for a partition wall is fireproof and sound insulation, and concrete, dry fireproof board, CB block, and ALC are used as materials. When these materials are used, as shown in FIG.
Penetrates the partition wall 61. Therefore, as shown in FIG. 7B, the electromagnetic shielding material 64 is attached to one surface of the partition wall 61 so as to have electromagnetic shielding performance. However, even in this case, the concrete slab 62 does not have the electromagnetic shielding performance even though the metal deck plate 63 has the electromagnetic shielding performance. Therefore, as shown in FIG. Electromagnetic waves penetrate through the floor 62 above 63, and electromagnetic shielding performance deteriorates.

In addition, similar problems exist in the upper part of the partition wall and the mating part with the deck plate of the floor slab. As shown in FIG. 8, generally, in this joint portion, a rock wool spraying foundation lath 75 is stretched at a depth H of the deck plate 76 above the stud runner 72 for sound insulation. However, there are many types of this joint depending on the shape of the deck plate 76, and the joint tends to be complicated. Therefore, the electromagnetic shielding of the mating portion becomes insufficient, and electromagnetic waves sneak from the mating portion at the partition wall between the electromagnetic shielding zone and the non-shielding zone, and the electromagnetic shielding performance deteriorates here as well. .

Such a problem of the joint portion also exists with the exterior material. Considering the general out-of-plane deformation of the fireproof section and the curtain wall, for example, the distortion due to wind pressure, the floor (deck plate 83) and the exterior material should be fitted with a cotton sprayed lath 84 regardless of solid concrete. It is filled with a flexible material such as. However, as shown in FIG. 9, the deck plate 83 and the exterior material also have the same problem of radio wave leakage, and when independent electromagnetic shielding zones are formed on the upper and lower floors, the problem of mutual interference of radio waves. Occurs. further,
Similarly, the gap formed between the pillar and the floor is where the electric wave leaks.

In this way, even if a structural member such as a wall, a floor, or a ceiling is provided with electromagnetic shielding performance, the electromagnetic shielding performance is deteriorated at its mating portion, and it is inefficient even if the electromagnetic shielding of the structural member is expensive. There is a problem that it becomes a thing.

The present invention solves the above problems, and an object of the present invention is to provide a method for configuring an electromagnetically shielded space that can improve the electromagnetically shielded performance at a mating portion and efficiently construct an electromagnetically shielded zone.

[Means for Solving the Problems]

Therefore, in the method of constructing an electromagnetically shielded space by partitioning the inside of a building with an electromagnetically shielded layer, a zone partitioned by a wall structure reaching a floor slab such as a fire wall is configured as a unit of the electromagnetically shielded space. In addition, a lath is grounded on the mating part between the floor slab and the wall and sprayed with rock wool, and the floor slab and the wall are electrically connected via the lath and integrated. In addition, it is characterized in that the gap between the pillar and the floor deck plate, each of which is made of a material having an electromagnetic shielding property, is covered with the shielding plate.

[Action]

In the method of constructing the electromagnetic shielded space of the present invention, since the zone electromagnetically shielded space defined by the wall structure reaching the floor slab is formed, additional wall rising is added as in the case of the partition formed below the double ceiling. No need for construction. Furthermore, in the floor slab, the metal deck plate is used as the electromagnetic shielding layer, so that the floor slab may be subjected to completely normal construction even when the electromagnetic shielding section is formed. In addition, since the connection between the floor slab and the wall and the gap between the pillar and the floor deck plate are electrically connected to each other for integration, high electromagnetic shielding performance can be maintained.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of a method of constructing an electromagnetically shielded space according to the present invention, and FIG. 2 is a diagram showing an embodiment of a method of constructing an electromagnetically shielded zone. In the figure, 1 and 14 are ceilings,
2 and 15 are outer walls, 3 and 11 are floors, 4 and 13 are partition walls, 5 is a core wall, 12 is a fire wall, 16 is a shielding zone, and 17 is a use shielding zone.

In FIG. 1, a ceiling 1 and a floor 3 are metal deck plates (F deck plates) used as structural materials and formwork.
Is used as it is as an electromagnetic shielding material, and the outer wall 2 and the opening window have an electromagnetic shielding performance such as an aluminum curtain wall, meshed / reflective laminated glass, etc., and the inner wall such as the partition wall 4 and the core wall 5 has a copper foil. A metal foil or a metal net (expansion metal, metal lath, etc.) is attached, and each electromagnetic shielding material is electrically connected and integrated to form an electromagnetic shielding space. In this way, we focused on the fact that the metal deck plate, aluminum curtain wall, etc., which have been conventionally used as structural materials, have electromagnetic shielding performance, and by utilizing them as they are, the number of additional elements when constructing an electromagnetic shielding space is reduced. .

In the method of constructing the electromagnetically shielded space described with reference to FIG. 1, the existing structural member is used as it is as an electromagnetically shielded material, but the example shown in FIG. 2 is not limited to the zone actually used as the electromagnetically shielded zone. The electromagnetic shield zone is constructed by expanding the zone to the fireproof area outside of it. That is, when there is a partition wall as a part of the electromagnetic shield zone that is normally used, the partition wall is not limited to only applying an electromagnetic shield material to form the electromagnetic shield zone, and the processing of the joint part does not leak electric waves. It is necessary to consider In that respect, constructing an electromagnetic shielding zone in the fireproof section facilitates electromagnetic shielding in the mating section.

Generally, in the case of electromagnetically shielding a wall, as described above, a method of attaching a metal foil or a metal net or applying a paint having an electromagnetic shielding performance is adopted. Therefore, the second
As shown in the figure, when the space enclosed by the floor 11, ceiling 14, outer wall 15 and partition wall 13 is used as the actual use shielding zone 17, let this space be the zone for ensuring the electromagnetic shielding performance as it is. In that case, for example, since there is no wall inside the double ceiling, it is often difficult to construct an electromagnetic shield, resulting in an increase in cost. In that respect, as shown in FIG. 2, when the structural electromagnetic shield zone 16 is formed by expanding the use shield zone 17 to the fire wall 12 outside the partition wall 13, the electromagnetic shield at the ceiling 14 and the partition wall 13 is formed. You don't have to think about it at all. Moreover, since the electromagnetic shield zone 16 can form a completely closed space by the floor 11, the fire wall 12, and the outer wall 15, care is taken to ensure the electromagnetic shield performance in each structural part and mating part. do it. Therefore, the partition wall 13 between the ceiling 14 and the floor 11 for electromagnetic shielding, such as the inside of the double ceiling when electromagnetic shielding is performed by the partition wall 13.
It is not necessary to add a special shielding wall on the extension line of or to make the ceiling an electromagnetic shielding structure, and it can be realized with the normal structure as it is.

When the closed space cannot be formed on the basic structural member like the fire wall shown in FIG. 2 and it is necessary to form the electromagnetic shielding zone including the partition wall, the ceiling and the floor are separated from each other. It is important to adopt a structure that eliminates radio wave leakage at the mating section. Examples of the structure are shown in FIGS. 3 to 6.

FIG. 3 is a diagram showing an embodiment of a method of constructing the upper end of the partition wall, where 21 is a floor, 22 is a deck plate, 23 is a stud runner, 24 is a partition wall, 25 is a rock wool sound absorbing material with lath,
26 and 27 are ceilings, and 28 is an electromagnetic shielding material. FIG. 3A is a sectional view of the partition wall between the shielding zone and the non-shielding zone, and FIG. 3B is a sectional view of the floor and deck plate when the partition wall is viewed from the front. The partition wall 24 is arranged between the office room that serves as the shielding zone and the corridor that serves as the non-shielding zone. An electromagnetic shielding material 28 such as a copper foil sheet is attached to the office room side, and the upper end of the partition wall 24 is provided. The rock wool sound absorbing material 25 containing lath is filled in the gap between the deck plate 22 and the deck plate 22. This is a piece of lath grounded and sprayed with rock wool. And
By electrically connecting and integrating the lath and the electromagnetic shielding material 28, the electromagnetic shielding performance between the corridor and the office is improved.

FIG. 4 is a diagram showing an embodiment of a method of constructing the lower end of the partition wall, 31 is a partition wall, 32 is a runner, 33 and 37 are electromagnetic shielding materials, 34 and 38 are anchor expanded metals, and 35 is floor concrete. , 36 are deck plates.

As shown in FIGS. 4A and 4B, at the lower end of the partition wall 31, the anchor expanded metal 34, 38 is buried in the floor concrete 35, and the upper portion thereof is attached to the partition wall 31, which is an electromagnetic shield 33. While electrically connected to 37 and integrated,
The lower ends of the anchor expanded metals 34 and 38 are electrically connected to the metal parts of the deck plate 36 to be electromagnetic shielding materials 33 and 3.
7, anchor expanded metal 34, 38 deck plate 3
Integrate 6 Anchor expanded metal 3
The sizes of the meshes of 4, 38 are set so as not to leak in consideration of the wavelength length of the electromagnetic wave. In addition, consideration will be given to reinforcing bar reinforcement in the slab and the surroundings of ready-mixed concrete when placing concrete.

FIG. 5 is a diagram showing an embodiment of a method of constructing a mating portion between a floor and an exterior material, 41 and 47 are electromagnetic shielding materials, 42 is sprayed rock wool, 43 is an interlayer mesh, and 44 is a metal formwork. , 45 is a concrete slab, 46 is a deck plate, and 48 is a fireproof panel.

The inter-layer mesh 43 has a shape as shown in FIG. 5 (c), and as shown in FIGS.
It is suspended and fixed by an L-shaped metal frame 44 in 42, and is electrically connected to the electromagnetic shields 41 and 47 on the wall side.
By doing so, the sprayed rock wool 42 is prevented from falling off and the electromagnetic shielding performance is secured.

The aluminum curtain wall has a mesh for spraying a dew condensation preventing material on the back surface of the panel, which can also serve as an electromagnetic shielding material.

Further, in the asbestos sandwich fireproof panel, as shown in FIG. 2B, an electromagnetic shielding paint is applied to the interior side as the electromagnetic shielding material 47, and the gap with the concrete slab 45 is the interlayer mesh 43.
Therefore, it may be electrically integrated.

FIG. 6 is a diagram showing one embodiment of a method of constructing a pillar,
51 is a pillar, 52 is a floor deck plate, 53 is a void, 54 is a shielding plate, and 55 is H steel.

Generally, as shown in FIG. 6, a gap 53 is formed between the pillar 51 and the floor deck plate 52, and if there is a leakage of electromagnetic waves between the upper and lower floors through this, the upper and lower floors are set as independent layers to form an electromagnetic shielding zone. When configured, mutual interference of electromagnetic waves occurs. Therefore, a shield plate 54 is used to fill such a gap 53, and the pillar 51 is inserted through the shield plate 54.
And the floor deck plate 52 are electrically connected and integrated.
Note that FIG. 7B is an example in which H steel is used as the structural member of the column, and in the case of H steel, unlike the case of the rectangular cross section shown in FIG. A combined shield plate 54 is used. As the shielding plate 54,
You may use the thing similar to another connection part. Rather, it is possible to reduce the number of types of electromagnetic shields by standardizing the electromagnetic shields by using similar electromagnetic shield reinforcements for each mating part, thus improving work efficiency and reducing costs. Can be planned.

The present invention is not limited to the above embodiment, and various modifications can be made.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, the electromagnetic shielding zone is configured by utilizing the structural members and the partition structure of the building which are normally used, and therefore the shielding efficiency can be comprehensively improved. Moreover, since the connecting portion is also electrically integrated by using expanded metal, mesh, or the like, the void can be efficiently filled, and the electromagnetic shielding performance can be improved.

[Brief description of drawings]

FIG. 1 is a diagram for explaining one embodiment of a method of constructing an electromagnetically shielded space according to the present invention, FIG. 2 is a diagram showing an embodiment of a method of constructing an electromagnetically shielded zone, and FIG. 3 is a diagram of a partition wall. FIG. 4 is a diagram showing an embodiment of a method of constructing the upper end, FIG. 4 is a diagram showing an embodiment of a method of constructing the lower end of the partition wall, and FIG. 5 is an embodiment of a method of constructing an associating portion between the floor and the exterior material. Figure showing an example, No. 6
FIG. 7 is a diagram showing an embodiment of a method of constructing a column, FIG. 7 is a diagram for explaining problems in a joint portion of a partition wall and a floor, and FIG. 8 is a joint portion of a partition wall and a ceiling. FIG. 9 is a diagram for explaining the problem, and FIG. 9 is a diagram for explaining the problem at the joint between the floor and the exterior. 1, 14 ... Ceiling, 2, 15 ... Outer wall, 3, 11 ... Floor, 4,
13 ... Partition wall, 5 ... Core wall, 12 ... Fire wall, 16
…… Shielding zone, 17 …… Use shielding zone.

Claims (6)

[Claims] 1. A method for constructing an electromagnetically shielded space by partitioning a building by an electromagnetically shielded layer, wherein a zone partitioned by a wall structure reaching a floor slab is constituted as a unit of the electromagnetically shielded space. How to construct a shielded space. 2. The method for constructing an electromagnetically shielded space according to claim 1, wherein the fireproof compartment is a zone partitioned by a wall structure reaching the floor slab. 3. The method for constructing an electromagnetically shielded space according to claim 1, wherein the metal deck plate of the floor slab is used as an electromagnetically shielded layer. 4. An electromagnetic shielding layer of a floor slab and an electromagnetic shielding layer of a wall are electrically connected through the lath by spraying rock wool on the underlayer. 5. A method for configuring an electromagnetically shielded space according to any one of 1. 5. The method for constructing an electromagnetically shielded space according to claim 1, wherein the electromagnetically shielded layer of the floor slab and the electromagnetically shielded layer of the wall are connected and integrated by an expanded metal. 6. A method for constructing an electromagnetically shielded space by partitioning a building with an electromagnetically shielded layer, wherein a space between a pillar and a floor deck plate, each of which is made of a material having an electromagnetically shielded performance, is covered with a shielded plate. A method for constructing an electromagnetically shielded space, characterized in that a pillar and a floor deck plate are electrically integrated via a plate.