JP2002054248A - Shield device for electromagnetic shield room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield device for an electromagnetic shield room capable of developing an assured electromagnetic shield function by a simple construction at a low cost. SOLUTION: This electromagnetically shielded electromagnetic shield room is formed of a floor deck plate 6 and a partition wall 7 having a shield layer 10. An I-steel is placed on the floor deck plate 6, the partition wall 7 is disposed on the I-steel 4 so as to allow the bottom end part of the shield layer 10 to come into contact therewith. Thus, a contact between the floor deck plate 6 and the shield layer 10 can be assured. Reinforcements 12 for connection are disposed in the I-steel 4 and, when floor reinforcements 5 are disposed, and a metal foil tape 11 for shielding a space between the reinforcements for connection and the shield layer 10 is stuck to the floor reinforcements 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielding device for an electromagnetic shielding room having an electromagnetic shielding function for preventing the penetration and leakage of electromagnetic waves.

[0002]

2. Description of the Related Art In recent years, in offices and the like, unnecessary electromagnetic waves have penetrated from the outside to adversely affect OA equipment and the like in offices, such as malfunctions and crosstalk, and, conversely, OA in offices.
Leakage (intrusion) of information such as information being eavesdropped due to leakage of electromagnetic waves generated from devices or the like outside the office has occurred. In order to solve such a problem, in a reinforced concrete (RC) building or a steel reinforced concrete (SRC) building, an electromagnetic shield for preventing the invasion and leakage of the unnecessary electromagnetic wave by using an electromagnetic shielding function of steel. Chamber shields are commonly used.

[0003] This uses a floor deck plate having an electromagnetic shielding function, and furthermore, a partition wall provided on the floor deck plate is provided with an electromagnetic shielding function (for example, a shielding layer made of a conductive material is provided). This provides an electromagnetic shielding room having an electromagnetic shielding effect, thereby solving the above problem.

[0004] However, since floor concrete is cast between the floor deck plate and the partition wall, a non-electromagnetic shield portion is formed by the thickness of the floor concrete layer, thereby obtaining a reliable electromagnetic shield effect. Can not do. Therefore, in order to solve this problem, a technique of arranging a shield member (an electromagnetic wave shielding member) on a floor concrete layer is known.

As a first prior art of this kind, there is an electromagnetic shielding floor disclosed in Japanese Patent No. 2529614.
This is to shield the non-electromagnetic shield part caused by the thickness of the floor concrete layer with a mesh member.In this construction, first, a mesh member for the electromagnetic shield is attached to the member that serves as the spacer for floor reinforcement. The spacers are fixed by welding, and then the spacers are fixed at regular intervals on the floor deck plate by welding. Then, a reinforcing bar is stretched and fixed between the spacers, and the shielding mesh member is fixed to the spacer so as to be exposed from the floor concrete surface, and this exposed portion is connected to a runner member provided at a lower portion of the partition wall. This forms an electromagnetic shield layer (electromagnetic shielding surface). Therefore, in a structure in which floor reinforcing bars are doubled,
It will be done over time.

Next, as a second prior art, Japanese Patent Application Laid-Open
There is an electromagnetic shield method disclosed in JP-A-107426. This is to form a floor concrete layer that should be present immediately below the partition wall having the electromagnetic shielding function using mortar or concrete mixed with chops formed of conductive material, and to block leakage and penetration of electromagnetic waves. is there. That is, the so-called floor concrete material itself has an electromagnetic shielding function.

[0007]

However, in the first prior art, when arranging the mesh member, the above-mentioned welding work of the spacer member and the reinforcing bar is very complicated, requires a lot of man-hours, and requires no component parts. There is a problem that there are many, and therefore, a significant cost increase. In addition, since the height direction dimension of the spacer member is smaller than the thickness of the floor concrete layer, the mesh member can take a free shape from the spacer member to the upper surface of the floor concrete layer. Therefore, when the floor concrete is cast, the mesh member is deformed, and the mesh member to be projected from the upper surface of the floor concrete layer is shifted at the projecting position. As a result, on the upper surface of the floor concrete layer, the mesh member does not protrude from the position where the partition wall is to be erected, and the connection between the partition wall and the mesh member cannot be ensured, that is, a space where electromagnetic waves leak or enter is formed. May occur.

In addition, in order to reduce the number of parts, a construction method that does not use a spacer member and a reinforcing bar for arranging the mesh member, that is, when the floor concrete is cast, the mesh member is temporarily fixed and used. There is also a construction method in which floor concrete is cast after the arrangement, but in this construction method, the above-mentioned inconvenience may be further remarkable.

Further, when the electromagnetic shield surface is formed by using a mesh member, there is a problem in that an electromagnetic wave in a high frequency band is allowed to pass due to the roughness of the mesh.

Next, in the second prior art, the chop as a conductive material to be mixed into concrete or mortar is expensive, and when the chop is mixed, there is a problem in the shielding performance due to the non-uniform mixing distribution. May occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to obtain a shield device for an electromagnetic shield room that exhibits a reliable electromagnetic shield function by a simple construction method and at low cost.

[0012]

In order to solve the above-mentioned problems, a shield device for an electromagnetic shield room according to claim 1 of the present application has a floor deck plate having an electromagnetic shield function and is cast on the floor deck plate. Floor concrete layer,
A partition wall having an electromagnetic shielding function erected on the floor concrete layer, wherein the non-electromagnetic shield part generated by the thickness of the floor concrete layer is a continuous surface. Characterized by being shielded by a shield member as a rigid body having an electromagnetic shield surface made of

According to the first aspect of the present invention, the non-electromagnetic shield part caused by the thickness of the floor concrete layer provided on the floor deck plate is formed by a rigid shield member having a continuous electromagnetic shield surface. The shielding has the following effects. First,
Since the electromagnetic shield surface for blocking the electromagnetic waves is provided on the shield member as a rigid body, the mesh member is deformed at the time of placing the floor concrete, as in the case of using the mesh member described above, whereby the partition wall is formed on the floor concrete. The problem that the electromagnetic shield surface is not located at the position where the antenna should be erected does not occur. In other words, since the shield member is rigid, it is not easily deformed, and even if floor concrete is cast, the electromagnetic shield surface is securely located at the intended position, and the state of contact with the partition wall is ensured. Becomes possible.

Further, when the floor concrete is cast, since it is rigid, even if the shield member is merely mounted on the floor deck plate without using any special fixing means, the mounting position is hardly shifted. Therefore, the construction becomes extremely simple, and the number of construction steps can be significantly reduced.

Next, since the electromagnetic shield surface is a continuous surface, it is possible to exhibit an extremely reliable electromagnetic shield function as compared with the electromagnetic shield surface using the mesh member described above. That is, when a mesh member is used, there is a possibility that an electromagnetic wave may pass in a high frequency band due to the coarseness of the mesh member. However, in the invention described in claim 1 of the present application, since the electromagnetic shield surface is a continuous surface, such leakage is prevented. There is no possibility. This is the same as compared with the case where an electromagnetic shielding function is obtained by mixing a chop made of a conductive material into concrete or mortar described above. In addition, materials that demonstrate the “electromagnetic shielding function”
It refers to any material that has the property of blocking electromagnetic waves, and the electromagnetic shield surface is formed of a material that exhibits the electromagnetic shield function (hereinafter, all have the same meaning in the present invention).

According to a second aspect of the present invention, there is provided a shield device for an electromagnetic shield room according to the first aspect, wherein the shield member is made of a shaped steel. According to the invention described in claim 2 of the present application, since the shield member is made of a shaped steel, it is possible to configure the shield member at extremely low cost. That is,
Since the section steel is made of steel, which is a conductive material that blocks electromagnetic waves, and is rigid, it can be used as a shield member according to claim 1 of the present application without any special processing. Here, the section steel refers to all structural steel materials such as I-section steel and angle iron. In addition, the section steel has higher strength than the floor concrete, and the use of the section steel as the shield member not only exerts the electromagnetic shielding function but also has the effect of improving the rigidity of the floor concrete.

According to a third aspect of the present invention, there is provided a shield device for an electromagnetic shield room according to the first or second aspect, wherein the shield member is fixed to the floor deck plate by fixing means. According to the third aspect of the present invention, since the shield member is fixed to the floor deck plate by the fixing means, the position of the shield member to be mounted on the floor deck plate at the time of floor concrete casting is set. Deviation can be more reliably prevented.

According to a fourth aspect of the present invention, there is provided a shield device for an electromagnetically shielded room according to any one of the first to third aspects.
A contact state between the shield member and the partition wall is secured by a tape member having an electromagnetic shielding function. When forming the electromagnetic shield chamber, a shield member is provided on the floor concrete layer, and a partition wall is erected on the shield member. However, at this time, in some cases, a gap is generated between the partition wall and the shield member,
This gap serves as a non-electromagnetic shield part, and there is a possibility that electromagnetic waves may leak or enter, but according to the invention of claim 4 of the present application,
Since the state of contact between the shield member and the partition wall is ensured by the tape member having the electromagnetic shielding function, there is no possibility that such a problem occurs.

According to a fifth aspect of the present invention, there is provided a shielding device for an electromagnetically shielded room according to any one of the first to fourth aspects.
The shield member is characterized in that an insertion hole through which a floor reinforcing bar constituting the floor concrete layer is inserted is formed in advance. According to the invention as set forth in claim 5 of the present application, an insertion hole through which the floor reinforcing bar is inserted in advance is formed in the shield member. Therefore, when floor reinforcement is performed, the floor reinforcing bar is inserted into the shield member at the construction site. There is no need to drill holes, and it is possible to shorten the man-hours for arranging floor reinforcement.

According to a sixth aspect of the present invention, there is provided a shield device for an electromagnetic shield room according to any one of the first to fifth aspects.
The shield member is provided with a connecting reinforcing bar which is connected to a floor reinforcing bar constituting the floor concrete layer in advance. When arranging floors in a state where the shield member is placed on the floor deck plate, it may be difficult to use long floor reinforcements due to the handling of the floor reinforcements at the construction site. According to the invention as set forth in claim 6 of the present application, since the connecting reinforcing bar for connecting to the floor reinforcing bar is provided in advance on the shield member, after the shield member is placed on the floor deck plate, the shield member has a desired length. The floor reinforcement can be provided by welding the cut floor reinforcement to the connection reinforcement disposed on the shield member. That is, even if the arrangement of the shield member on the floor deck plate makes it difficult to arrange the floor reinforcement, this problem can be solved.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of the electromagnetic shield room 1. The electromagnetic shield room 1 is made of a steel frame (S) building or a steel frame reinforced concrete (SR
C) The building is formed by a floor deck plate 6 mounted on the steel beam 2, a partition wall 7 erected on the floor concrete 9, and a ceiling 8.

The floor deck plate 6 is formed by plating a steel plate and has conductivity, thereby blocking electromagnetic waves from below. The partition wall 7 has a conductive shield layer 10 (see FIG. 2), thereby blocking electromagnetic waves from the lateral direction. The ceiling 8 is the electromagnetic shield room 1
Is provided on the middle floor of a building having a plurality of floors as an S building or an SRC building, for example, by using the floor deck plate 6 of the electromagnetic shield room 1 located on the first floor. It is also possible to obtain a shielding effect, or to provide the electromagnetic shielding function by providing a shielding layer 10 having conductivity similarly to the partition wall 7.

Next, the function of blocking electromagnetic waves between the floor deck plate 6 and the partition wall 7 will be described with reference to FIG. FIG. 2 shows a partition wall 7 indicated by a broken line b in FIG.
FIG. 3 is a cross-sectional view of the floor deck plate 6 cut from the direction a, but here, for convenience of explanation, the main part of the shield device of the electromagnetic shield room according to the present invention is omitted.
Reference numeral 13 indicates a part of the floor deck plate 6 in the shape of a folded plate.

In FIG. 2, a floor reinforcing plate 5 is arranged on a floor deck plate 6 and a floor concrete 9 is cast. The partition wall 7 is placed on the floor concrete 9 as described above.
The electromagnetic wave Wcut from the lateral direction is cut off by the shield layer 10 located inside the electromagnetic shield chamber 1 in the partition wall 7. The floor deck plate 6 also blocks electromagnetic waves Wcut from below. However, in the state of FIG. 2, the floor deck plate 6 and the shield layer 10 are in a non-contact state, that is, because the thickness h of the floor concrete 9 exists, the part becomes a non-electromagnetic shield part, and as shown in the drawing. The electromagnetic wave Win enters. Therefore, a shield device for the electromagnetic shield chamber 1 that shields the electromagnetic wave Win by disposing a shield member in the non-electromagnetic shield part is required.

FIG. 3 is a cross-sectional view of the above-described shield device cross-sectional view of FIG. 2 illustrating a main part of the shield device according to the present invention. In the figure, reference numeral 4 is made of steel as a “shield member”. 1 shows an I-beam. The I-shaped steel 4 is placed on the floor deck plate 6. At this time, when the partition wall 7 is erected, the I-section steel 4 is positioned and placed at the position where the lower end of the shield layer 10 is located, and the floor deck plate 6
The shield layer 10 is kept in contact with the electromagnetic wave Win in FIG.

Here, it goes without saying that the sectional shape of the I-section steel 4 is not limited to the I-section, but may be any other shape (angle steel, channel steel, etc.). That is, as long as it shields the non-electromagnetic shield part generated by the thickness h of the floor deck plate 6 (if it has an electromagnetic shield surface that blocks electromagnetic waves Win), its shape, structure, etc. are not limited. It does not matter. Therefore, for example, a shield member that performs plating or the like on the surface of a rectangular object made of a non-conductive material may be used.

When a section steel is used as in this embodiment, the shield member can be formed at low cost.
That is, by using the I-shaped steel 4 as a standard product that is widely and generally used, it is possible to use the I-shaped steel 4 itself as a shielding member without any special processing.

The shape steel has a higher strength than the floor concrete 9, and the use of the shape steel as a shield member not only exerts the electromagnetic shielding function but also improves the rigidity of the floor concrete 9. It also has an effect.

Further, in the present embodiment, the electromagnetic shield surface for blocking the electromagnetic wave Win is a side surface of the I-shaped steel 4, and the side surface is a continuous surface. This makes it possible to exhibit an extremely reliable electromagnetic shielding function as compared with the electromagnetic shielding surface using the mesh member described above, and is particularly effective in a high frequency band (for example, 1 GHz or more).

Next, a metal foil tape 11 as a tape member having an electromagnetic shielding function is attached to the upper surface of the I-section steel 4 and the lower part of the shield layer 10 in the longitudinal direction.
By using the metal foil tape 11 as a tape member having an electromagnetic shielding function in this way, even if a gap is generated between the upper surface of the I-shaped steel 4 and the lower end of the shield layer 10, a contact state is ensured. Thus, the electromagnetic wave Win can be surely cut off.

By the way, it is also possible to arrange the connecting reinforcing bar 12 in advance on the I-shaped steel 4 as indicated by reference numeral 12. That is, the I-section steel 4 according to the present invention is
In the case where floor reinforcement is carried out in a state where it is placed on the top, it may be difficult to use a long floor reinforcement 5 due to the layout depending on the construction site. By arranging the reinforcing bars 12, it is possible to perform floor reinforcing by welding the short reinforcing bar 5 to the connecting reinforcing bar 12 by a certain length L at the construction site.

In the present embodiment, the strength is obtained by securing the fixed length L to 40 times the diameter of the floor reinforcing bar 5 and the connecting reinforcing bar 12. When the long floor reinforcing bar 5 can be used, the connecting reinforcing bar 12 is not provided and
It is also possible to provide an insertion hole through which the floor reinforcing bar 5 is inserted into the section steel 4. As a result, I-beam 4
It is no longer necessary to drill through holes, and it is possible to shorten the construction period.

Next, the procedure for constructing the electromagnetic shield room 1 will be outlined with reference to FIGS. 4 to 8
Is a schematic diagram showing a construction procedure of the electromagnetic shield room 1,
For simplification of the drawing, each component is shown in a simplified diagram.

First, as shown in FIG. 4, the steel beam 2 is assembled to the steel column 3 and the floor deck plate 6 is mounted. next,
As shown in FIG. 5, the I-section steel 4 is placed in a state where the partition wall 7 is positioned at the position where the partition wall 7 should be erected. At this time, the I-shaped steel 4 is fixed to the floor deck plate 6 by fixing means (for example, welding or other mechanical means) in order to ensure that the I-shaped steel 4 does not shift when the floor concrete 9 is cast later. Fixing means) is also effective.

The I-shaped steel 4 has a reinforcing bar insertion hole 4a for floor reinforcement.
Are perforated in advance. As described above, this is for directly arranging the floor reinforcing bar without arranging the connecting reinforcing bar 12 shown in FIG. 3, and therefore, when arranging the floor reinforcing bar 5 shown in FIG. It is not necessary to pierce the insertion hole 4a in
The construction period can be shortened.

After the floor reinforcement is performed as shown in FIG. 6, the floor concrete 9 is poured as shown in FIG. At this time, the shield layer 1 of the partition wall 7 erected on the floor concrete 9
In order to ensure the contact with zero, the floor concrete 9 is cast while taking care not to cover the upper surface of the I-shaped steel 4 with concrete. In this state, as shown in FIG. 8, the partition wall 7 is erected, and the lower end of the shield layer 10 and the I-shaped steel 4
The metal foil tape 11 is stuck between the upper surface. As described above, it is possible to reliably prevent the electromagnetic wave Win from entering due to the thickness of the floor concrete layer 9.

[0037]

As described above, according to the present invention,
The non-electromagnetic shield part generated by the thickness of the floor concrete layer provided on the floor deck plate is shielded by a shield member as a rigid body having an electromagnetic shield surface consisting of a continuous surface. The electromagnetic shield surface can be reliably disposed at the position, and the electromagnetic waves in the high frequency band can be reliably blocked.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electromagnetic shield room.

FIG. 2 is a sectional perspective view of a broken line b in FIG.
It is.

FIG. 3 is a sectional perspective view showing an electromagnetic shield device according to the present invention.

FIG. 4 is a perspective view (schematic view) showing a procedure for installing an electromagnetic shield room according to the present invention.

FIG. 5 is a perspective view (schematic view) showing a procedure for installing an electromagnetic shield room according to the present invention.

FIG. 6 is a perspective view (schematic view) showing a procedure for installing an electromagnetic shield room according to the present invention.

FIG. 7 is a perspective view (schematic view) showing a procedure for constructing an electromagnetic shield room according to the present invention.

FIG. 8 is a perspective view (schematic view) showing a procedure for installing an electromagnetic shield room according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic shield room 2 Steel beam 3 Steel column 4 I-shaped steel 5 Floor reinforcing bar 6 Floor deck plate 7 Partition wall 8 Ceiling 9 Floor concrete 10 Shield layer 11 Metal foil tape 12 Connection reinforcing bar

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Morimoto 31st Ichibancho Chiyoda-ku, Tokyo Tokyo, Japan Inside (72) Inventor Hiroyuki Numata 31st Ichibancho Chiyoda-ku, Tokyo 31 Takanori Zenigami, Inc. (72) Inventor Toshiya Kurosawa 31st, Ichibancho, Chiyoda-ku, Tokyo 31-inner Takagumi Co., Ltd. (72) Inventor Yoshinobu Suzuki 31st, Ichibancho, Chiyoda-ku, Tokyo-inner, Kentakagumi Inc. Hiroshi Miyasaka 1-11-11 Shiba, Minato-ku, Tokyo Japan Glass Environment Amenity Co., Ltd. (72) Inventor Motoyasu Togashi 1-11-11 Shiba, Minato-ku, Tokyo Japan Glass Environment Amenity Co., Ltd. (72) Inventor Yasushi Hoshino 1-11-11 Shiba, Minato-ku, Tokyo Nippon Sheet Glass Environment Amenity Co., Ltd. F-term (reference) 2E001 DH01 EA04 EA05 FA07 FA11 GA12 GA17 GA42 GA52 GA62 HA04 HB02 5E321 AA42 AA44 BB44 CC16 GG05

Claims (6)

[Claims] 1. A floor deck plate having an electromagnetic shielding function, a floor concrete layer cast on the floor deck plate, a partition wall having an electromagnetic shielding function and erected on the floor concrete layer, A non-electromagnetic shield part generated by the thickness of the floor concrete layer is shielded by a shield member as a rigid body having an electromagnetic shield surface formed of a continuous surface. The shield device of the electromagnetic shield room. 2. The shield device according to claim 1, wherein the shield member is made of a shaped steel. 3. The shield device according to claim 1, wherein the shield member is fixed to the floor deck plate by fixing means. 4. The shield according to claim 1, wherein a contact state between the shield member and the partition wall is secured by a tape member having an electromagnetic shield function. apparatus. 5. The electromagnetic shield chamber according to claim 1, wherein an insertion hole for inserting a floor reinforcing bar constituting the floor concrete layer is formed in the shield member in advance. Shield device. 6. The electromagnetic member according to claim 1, wherein a connection reinforcing bar connected to a floor reinforcing bar forming the floor concrete layer is provided in advance on the shield member. Shield device for shield room.