JP2001336247A - Electromagnetic wave shield ceiling and renewal construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shield ceiling and a renewal construction method capable of reducing cost by forming an electromagnetic wave shield layer without using a deck plate for electromagnetic wave shielding in the construction work for a new building and constituting the electromagnetic wave shield layer easily by merely increasing a simple process even in the renewal construction work. SOLUTION: A facility opening part 5 is formed by constituting it by an electricity conducting woven fabric 4 spreaded on a lower face 6 of a substrate board 2 provided with a facility opening 7, conductive tape 8 bonded on the woven fabric 4 and extended on an upper face 9 of the substrate board 2 through the facility opening 7, and a conductive tape 11 bonded on a finish member 3 spreaded on a lower face of the woven fabric 4 and a lower face 10 of the finish member 3 and joined with the conductive tape 8 through the facility opening 7, and a metallic facility equipment is mounted in an electric joined condition by providing a conductive gasket between the conductive tape 11 bonded on the lower face 10 of the finish member in the facility opening part 5 and it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shield ceiling and a renewal method, and more particularly, to reducing the construction cost by omitting a shield layer by laying a deck plate, and performing renewal work only by adding a simple process. It relates to an electromagnetic shield ceiling and a renewal method that can be easily implemented.

[0002]

2. Description of the Related Art Recent office buildings are required to respond sufficiently to the introduction of advanced information equipment such as OA equipment and personal computers and information systems using the same in response to the information age. There is a tendency for the building itself to shield electromagnetic waves for reasons.

[0003] In other words, the required performance required of an office building in the information age is, firstly, "prevention of malfunction of information equipment" which protects equipment inside the office building from unnecessary radiation from outside.
The second is "securing information security" for blocking information leaked as low-level radio waves from a computer system in an office building or a wireless LAN to the outside.
Third, in order to eliminate shortage of channels due to mutual interference of communication carriers when a wireless LAN or the like is used between adjacent office buildings, “advanced use of radio frequency” has been achieved.

[0004] These electromagnetic wave shielding office buildings deal with the first problems mentioned above by applying an electromagnetic wave shield of about 30 dB at 25 MHz to 1 GHz, and address the second problem with important meetings. In a room such as a room, an electromagnetic wave shield having a high level of 40 dB may be required. When the use of multimedia systems and the use of wireless systems such as office PHS and wireless LAN become widespread in offices, the third problem of congestion in a specific frequency band is 25 MHz.
It is required to secure a communication cell of about 20 dB at up to 3 GHz.

As described above, in order to ensure the sound and reliable operation of OA equipment and wireless systems in an office building and prevent leakage of confidential information, the space to be shielded from electromagnetic waves in the office building must be made of a conductive material such as metal. With no gaps.

[0006] For this reason, in the electromagnetic wave shielding work of the S building, a deck plate is laid on the ceiling and floor as an existing building material, and the wall surface is made of a conductive material such as a steel plate, a conductive nonwoven fabric, or an expanded metal. An electrical conductor is formed by covering and electrically connecting the surfaces.

[0007] Also, in the case of an electromagnetic wave shielding work for a ceiling in a newly-constructed RC structure, the cost has to be increased because a deck plate which does not need to be laid is laid as an electromagnetic wave shielding layer.

Further, in the electromagnetic wave shielding work by renewal, etc., since fishing bolts and the like from the ceiling are in the way, the construction efficiency is reduced and the construction period is increased.
As a result, it has been a factor to increase the cost.

[0009]

SUMMARY OF THE INVENTION The present invention is a concrete improvement proposal in view of the above-mentioned problem in electromagnetic wave shielding work. In a new construction work, the electromagnetic wave shielding work is performed without using a deck plate for electromagnetic wave shielding work. An electromagnetic wave shield ceiling and a renewal method are provided in which a shield layer is formed to reduce costs, and an electromagnetic wave shield layer can be easily formed by simply increasing the number of simple steps in renewal work.

[0010]

According to the present invention, there is provided an electromagnetic wave shielding ceiling according to the present invention, comprising: a conductive woven fabric laid on the lower surface of a base board provided with a facility opening; A conductive tape extended on the upper surface of the board,
Equipment composed of a finishing material laid on the lower surface of the conductive woven fabric and a conductive tape attached to the conductive tape adhered to the conductive woven fabric through the equipment opening that is attached to the lower surface of the finishing material and passed through the equipment opening An opening is formed, and a conductive gasket is interposed between the conductive tape attached to the lower surface of the finishing material at the opening of the equipment and the metal equipment to be mounted, and electrically connected to the equipment. It facilitates the formation of a shielded electromagnetic wave shield.

In the renewal method of the electromagnetic wave shield ceiling according to the present invention, the installed equipment is removed to open the equipment opening, and thereafter, a conductive woven fabric is laid on the lower surface of the base board and attached to the conductive woven fabric. The installed conductive tape is extended to the upper surface of the base board via the facility opening, the finishing material is laid on the lower surface of the conductive woven fabric, and the conductive tape is attached to the lower surface of the finishing material, The tape is attached to the conductive tape attached to the conductive woven cloth via the equipment opening to form the equipment opening, and then between the conductive tape attached to the lower surface of the finishing material. It consists of reattaching metal equipment with a conductive gasket in between, and simply forming an electromagnetic wave shield on the ceiling equipped with the equipment by simply increasing the number of steps to sandwich the electromagnetic wave shielding material and the conductive gasket. Yuaru to facilitate the construction work.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An electromagnetic wave shielding ceiling according to the present invention comprises a conductive woven fabric laid on the lower surface of a base board provided with a facility opening, and a conductive woven cloth adhered to the conductive woven fabric and passed through the facility opening. Conductive tape stretched on the upper surface, a finishing material laid on the lower surface of the conductive woven fabric and affixed to the lower surface of the finishing material,
Basically, the equipment opening consists of a conductive tape that is joined to the conductive tape pasted on the conductive woven cloth via the equipment opening, and this equipment opening is attached to the lower surface of the finishing material. Metallic equipment is mounted with a conductive gasket interposed between the conductive tape and the conductive tape, so that they are electrically joined together. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view (a) of an electromagnetic wave shield ceiling according to the present invention and a construction step (b) of a facility opening.

As shown in the sectional view (a), the electromagnetic wave shield ceiling 1 is formed by attaching a conductive woven cloth 4 between a base board 2 and a finishing material 3 as a whole. Finishing material 3
The rock wool sound absorbing material or the like is appropriately selected to form a ceiling surface.

When the facility opening 5 is formed in the electromagnetic wave shielding ceiling 1, it is constructed according to the process shown in FIG.

On the lower surface 6 of the base board 2, the conductive woven cloth 4 is stuck to the periphery of the equipment opening 7. Next, a conductive tape 8 is stuck on the conductive woven cloth 4 stuck around the equipment opening 7, and the conductive tape 8 is passed through the equipment opening 7 to a position above the base board 2. After being extended, it is adhered and fixed to the upper surface 9.

After that, the finishing material 3 is attached to the conductive woven fabric 4 with the conductive woven fabric 4 and the conductive tape 8 interposed therebetween to form a ceiling surface. A conductive tape 11 is stuck between the lower surface 10 of the finishing material 3 and the conductive tape 8 via the facility opening 7, and the conductive woven cloth 4 and the Is formed integrally with the conductive portion 12.

Since the conductive portion 12 is arranged so as to correspond to a main body frame of the equipment described later, the bonding length from the equipment opening 7 is sufficient within a range covered by the main body frame of the equipment. . Further, the other end of the conductive tape 11 is
It is arranged to be electrically connected to, and may be extended to the upper surface 9 of the base board 2 and connected to the conductive tape 8 as shown in the drawing, so that the work can be reliably performed with strength.
If necessary, a configuration that is electrically integrated with the conductive tape 8 may be selected so as to satisfy the desired function.

Since the equipment opening 5 is formed as described above, the conductive part 12 electrically connected integrally with the conductive woven cloth 4 is exposed on the ceiling surface around the equipment opening. It is configured.

Next, the installation of the equipment will be described. It is essential that the equipment employed in the present invention is made of metal, and FIG. It is sectional drawing at the time of mounting.

As shown in the figure, the embedded lighting fixture 15 is mounted by interposing a conductive gasket 17 between the conductive portion 12 of the equipment opening 5 and the main body frame 16 of the embedded lighting fixture 15,
Thereby, the embedded lighting fixture 15 and the conductive woven fabric 4 form an electrically integrated conductive state.

Although metal equipment has small holes for heat release and installation, in the present embodiment, such holes are not particularly closed and existing equipment can be used as they are. It corresponds in the state of. The reason for this is that when the frequency of the object to be shielded is low, the wavelength is larger than the diameter of the hole, so there is no leakage of radio waves, and when the frequency is high, the ceiling concrete itself forms the electromagnetic wave shielding layer. This is to shield electromagnetic waves.

In order to confirm the above phenomenon, the state of the electromagnetic wave shield in each frequency band from 100 MHz to 3 GHz was measured in the above embodiment.
Is a measured value showing the electromagnetic wave shielding performance of the electromagnetic wave shielding ceiling according to the present invention.

As shown in the figure, the electromagnetic wave shielding performance of the electromagnetic wave shielding ceiling equipped with the embedded lighting fixture shows a measured value of 50 dB or more in each frequency band. Established electromagnetic shielding performance. In particular, the measurement results clearly show that the concrete ceiling itself improves its electromagnetic wave shielding performance as the frequency increases, thereby improving the overall electromagnetic wave shielding performance of the electromagnetic wave shielding ceiling. You can check the actual situation.

As the equipment to be arranged on the ceiling surface, in addition to the above-mentioned lighting equipment such as the embedded lighting equipment and the downlight, there are also air-conditioning suction / discharge ports such as speakers and air-conditioning anemos. This can be handled by forming a conductive state by interposing a conductive gasket between the main body frame and the conductive portion 12.

Next, referring to FIG. 4, the structure of the inspection port, which is different from the above-described equipment, but is arranged on the ceiling surface will be described. FIG. 4 (a) is a plan view of the inspection opening as viewed from behind the ceiling, and FIG. 4 (b) is a partial sectional view thereof.

The electromagnetic wave shield ceiling 1 on which the inspection port 20 is arranged includes the base board 2 and the finishing material 3 similarly to the above embodiment.
The conductive woven fabric 4 is sandwiched between
Reference numeral 1 denotes a conductive tape 22 attached to the conductive woven fabric 4 and extended and bonded to the upper surface 9 of the base board 2 via the facility opening 24.

The outside 23 of the inspection port 20 is electrically connected to the conductive tape 22 through the equipment opening 24 to form an integral conductive state. The opening / closing portion 26 formed on the inner side 25 of the inspection port 20 has a conductive woven fabric 29 sandwiched between a base board 27 and a finishing material 28, similarly to the ceiling configuration corresponding to the outer side 23. The conductive tape 30 is attached to the conductive woven fabric 29 and extends to the upper surface 32 of the base board 27 via the side surface 31 of the base board 27. The inside 25 of the inspection opening 20 is the side 3 of the base board 27.
1 and electrically connected to the conductive tape 30 via the side surfaces 31 and the like, thereby forming a conductive state integral with the opening / closing section 26.

FIG. 4 shows the outer and inner upper ends of the inspection port.
As shown in (a), a conductive material 33 such as an aluminum plate is disposed over the entire circumference, and on the side that descends when the opening / closing section 26 is opened, the rotation axis 34 of the opening / closing section 26 is centered. The conductive material 33 disposed on the outside 23 of the inspection opening is fixed by screws 35. On the side where the opening / closing part 26 rises, the conductive material 33 disposed on the inside 25 of the inspection port is fixed by screws 35 on the contrary.

The fixing of the conductive material 33 by the screw 35 is adjusted so that a desired pressing force is applied to the upper or lower end of the inspection port corresponding to the unfixed side to form an electromagnetic wave shielding state. ing.

Although the above description has been given of the embodiment in which the electromagnetic shielding ceiling is used when a new building is constructed, the electromagnetic shielding ceiling can be formed by the following steps when an existing building is renewed.

That is, in the renewal method of the electromagnetic wave shielding ceiling according to the present invention, the installed equipment is removed to open the equipment opening, and thereafter, the conductive woven fabric is laid on the lower surface of the base board, and the conductive woven fabric is laid. Extend the conductive tape attached to the upper surface of the base board through the equipment opening, lay the finishing material on the lower surface of the conductive woven fabric, paste the conductive tape on the lower surface of the finishing material, The conductive tape is pasted on the conductive tape pasted on the conductive woven fabric through the facility opening to form the facility opening.

Next, metal equipment is mounted again while a conductive gasket is interposed between the conductive tape and the conductive tape attached to the lower surface of the finishing material, thereby newly forming an electromagnetic wave shield ceiling.

As described above, the electromagnetic wave shield ceiling and the renewal method according to the present invention can reduce the cost by easily forming the electromagnetic wave shield layer without using the deck plate for the electromagnetic wave shield in the case of new construction. Even in the renewal work, it is possible to simply and easily form the electromagnetic wave shielding layer by increasing the number of simple steps, and in addition, a desired electromagnetic wave shielding performance is established.

Although the present invention has been described in detail based on the preferred embodiments, the electromagnetic shield ceiling and the renewal method according to the present invention are not limited to the above-described preferred embodiments. Naturally, various changes can be made without departing from the scope of the present invention.

[0036]

The electromagnetic wave shielding ceiling according to the present invention is a conductive woven fabric laid on the lower surface of a base board provided with a facility opening, and is attached to a conductive woven cloth and extended to the upper surface of the base board via the facility opening. Conductive tape, a finishing material laid on the lower surface of the conductive woven fabric, and a conductive material attached to the lower surface of the finishing material and joined to the conductive tape attached to the conductive woven fabric through the facility opening. Forming an equipment opening composed of conductive tape, electrically connecting and bonding a conductive gasket between the conductive tape attached to the lower surface of the finishing material of the equipment opening and the metal equipment to be mounted Therefore, the electromagnetic wave shield of the ceiling equipped with the equipment is easily formed, and the effect of reducing the construction cost of the electromagnetic wave shield ceiling is exhibited.

In the renewal method of the electromagnetic wave shield ceiling according to the present invention, the installed equipment is removed to open the equipment opening, and thereafter, a conductive woven cloth is laid on the lower surface of the base board, and the conductive woven cloth is attached to the conductive woven cloth. The installed conductive tape is extended to the upper surface of the base board via the facility opening, the finishing material is laid on the lower surface of the conductive woven fabric, and the conductive tape is attached to the lower surface of the finishing material, The tape is attached to the conductive tape attached to the conductive woven cloth via the equipment opening to form the equipment opening, and then between the conductive tape attached to the lower surface of the finishing material. Since it is formed by reattaching metal equipment with a conductive gasket interposed, the electromagnetic wave shield on the ceiling equipped with the equipment is increased simply by inserting the electromagnetic wave shielding material and increasing the process of interposing the conductive gasket. Form It is to demonstrate the low cost construction to effect to facilitate the renovation work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electromagnetic wave shielding ceiling according to the present invention (a) and a construction process diagram of an equipment opening (b).

FIG. 2 is a sectional view of an embodiment in which equipment is mounted on an electromagnetic wave shielding ceiling according to the present invention.

FIG. 3 is a measured value obtained by measuring the electromagnetic shielding performance of the electromagnetic shielding ceiling according to the present invention.

FIG. 4 is a plan view (a) and a partial cross-sectional view (b) of an inspection port in an electromagnetic wave shielding ceiling according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electromagnetic shield ceiling, 2 Base board, 3 Finishing material, 4 Conductive woven cloth, 5 Equipment opening, 6 Underside of base board, 7 Equipment opening, 8, 11 Conductive tape, 9 Upper surface of base board, 10 Finishing material The underside of
12 conductive part, 15 equipment, 16 body frame of equipment, 17 conductive gasket, 20 inspection port, 2
1 equipment opening, 22, 30 conductive tape, 23
Outside inspection port, 24 Equipment opening, 25 Inside inspection port, 26 Opening / closing part, 27 Base board for opening / closing part, 2
8 Finishing material of opening / closing part, 29 conductive woven fabric of opening / closing part, 3
1 Side of opening / closing part, 32 Upper surface of base board, 33
Conductive material, 34 rotating shaft, 35 screws,

(72) Inventor Yoshimasa Sugaya 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Makoto Kokubu 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Hirokazu Sato 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2E001 DH01 FA14 FA31 GA23 GA27 HB04 LA01 5E321 AA43 BB41 BB44 CC16 GG05

Claims (2)

[Claims] 1. A conductive woven cloth laid on a lower surface of a base board provided with a facility opening, a conductive tape attached to the conductive woven cloth and extended to an upper surface of the base board through the facility opening,
It is composed of a finishing material laid on the lower surface of the conductive woven fabric and a conductive tape attached to the lower surface of the finishing material and joined to the conductive tape attached to the conductive woven fabric through a facility opening. An electromagnetic wave shielding ceiling formed by electrically connecting a conductive gasket between an equipment opening, a conductive tape attached to a lower surface of a finishing material at the equipment opening, and a metal equipment to be mounted. 2. The installation of the installed equipment is removed to open the equipment opening. Thereafter, a conductive woven fabric is laid on the lower surface of the base board, and the conductive tape attached to the conductive woven fabric is
Extending to the upper surface of the base board through the facility opening, laying a finishing material on the lower surface of the conductive woven fabric, pasting a conductive tape on the lower surface of the finishing material, the conductive tape, the equipment A conductive gasket is placed between the conductive tape and the conductive tape pasted on the lower surface of the finishing material by pasting it on the conductive tape pasted on the conductive woven fabric through the opening. A renewal method of the electromagnetic shield ceiling that consists of reattaching metal equipment with intervention.