JP3000215B1 - Electromagnetic wave shielding precast concrete plate and building outer wall structure using the precast concrete plate - Google Patents

Abstract

An object of the present invention is to solve a problem that a conductive layer as an electromagnetic wave shield is not damaged during transportation of a PC board, and the electromagnetic wave shielding performance is reduced. SOLUTION: This is a precast concrete plate 1 with a decorative panel in which a backing concrete 3 is applied to a juxtaposed body of decorative panels 2 arranged on the same plane in a longitudinal direction.
And a conductive layer 4 between the backing concrete 3 and the conductive layer 4 of the decorative panel 2 adjacent to the decorative panel 2 are connected by a first conductive connecting member 7. The edge fitting 8 connected by the conductive connecting member 9 was fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electromagnetic wave shield in a building.

[0002]

2. Description of the Related Art In recent years, with the spread of electronic devices, OA devices, mobile phones, and the like, there has been an increasing demand for preventing the harmful effects of electromagnetic waves emitted therefrom.

Conventionally, as one of the measures to meet this demand, it is known to attach a metal plate to the outside or inside of the concrete of the outer wall of a building (first prior art). However, this has the following problems.

It is necessary to check the performance of the applied electromagnetic wave shield. In the prior art construction, it is necessary to check the concrete of the outer wall of the building. This requires that one of the radio wave transmitter and the radio wave measuring device in the inspection apparatus be installed outside the building and the other is installed inside the building. Therefore, there is a problem that the required check is exaggerated.

[0005] Conventionally, a precast concrete board (hereinafter referred to as "PC board") in which a metal mesh, a reinforcing bar, and carbon fibers are embedded is also known (second prior art). This makes it possible to perform an electromagnetic wave measurement inspection at a PC board manufacturing plant, and the required inspection is easier than that according to the first conventional technique. However, the one with a buried metal mesh or a reinforcing bar has a performance of shielding electromagnetic waves. There are not enough problems,
In the case where carbon fibers are embedded, a sufficient amount of carbon fibers cannot be blended because it is necessary to ensure the strength of concrete, and electromagnetic wave shielding performance becomes insufficient.

Further, both of the first and second prior arts
When a PC board is applied to an outer wall of a building, it is necessary to connect an electromagnetic wave shielding member such as a metal mesh, a reinforcing bar, or carbon fiber between adjacent PC boards. In order to do this, it is necessary to attach connection terminals to the edge of the PC board, and to connect the connection terminals between adjacent PC boards.

In order to solve this problem, a metal foil or a metal plate is attached to the back surface and the periphery of the PC board, and when the PC board is installed on the outer wall of the building, a conductive connecting member is filled between the small openings of the adjacent PC boards. It is also known to make the required connections (third prior art).

However, in general, it is difficult to obtain a metal foil or a metal plate having sufficient strength as a practical problem due to various reasons, and the metal plate or the metal foil may be exposed. There is a problem that the electromagnetic wave shielding performance is deteriorated due to breakage during transportation of the PC board.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the first to third prior arts.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a precast concrete plate with a decorative panel in which a backing concrete is applied to a parallel body of decorative panels arranged on the same plane in a longitudinal direction. It has a conductive layer between concrete and connects the conductive layers of adjacent decorative panels with a first conductive connecting member, and is connected to the peripheral side of the backing concrete to the conductive layer by a second conductive connecting member. The present invention is achieved by an electromagnetic wave shielding precast concrete plate, in which an edge fitting provided is fixed.

Another object of the present invention is to provide a precast concrete in which a conductive layer is interposed between precast concrete, tiled precast concrete or concrete finish precast concrete applied to the back of a decorative panel, and postcast concrete. This is achieved by a precast concrete plate, wherein an edge fitting connected to the conductive layer by a second conductive member is fixed to a peripheral side surface of the pre-cast concrete and / or the post-cast concrete. You.

Preferably, a radio wave absorbing plate is buried in the precast concrete on the back of the decorative panel.

[0013] Further, an object of the present invention is an electromagnetic wave shielding building outer wall structure in which the above precast concrete plate is fixed to a building, wherein a conductive filler is inserted into joints of the adjacent precast concrete plates, and The present invention is also achieved by an electromagnetic wave shielding building outer wall structure in which adjacent precast concrete slab edge fittings are connected by a conductive filler.

The above-mentioned "edge metal fittings" literally mean not only metal fittings for the edge but also metal fittings surrounding the edge and the peripheral surface. This applies to the claims and the following description.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In all the figures, the same symbols are used.
Refers to the same part or substantially the same part.

In the PC board 1 with decorative panel shown in FIGS. 1 to 10, a backing concrete 3 is applied to a juxtaposed body of decorative panels 2 arranged on the same plane in a vertical direction. A conductive layer 4 as an electromagnetic wave shielding member is provided between them. Various exterior panels such as a ceramic plate and a natural stone plate can be used for the decorative panel 2. A known anchor (not shown) is used to join the decorative panel 2 and the backing concrete 3. The P
C board is a half PC board (PC board whose thickness is about half of normal thickness)
(FIG. 10).

The conductive layer 4 is formed by bonding a conductive fiber or a conductive mesh 4a to the entire back surface of the decorative panel 2 with an elastic adhesive 4b (FIG. 1), or by connecting the conductive fiber or the conductive mesh 4a.
By sticking a conductive pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer 4c on one or both surfaces thereof to the entire back surface of the decorative panel 2 (FIG. 2).

As the conductive fiber, a composite in which a conductor such as silver, copper or nickel is laminated on a fiber layer or nonwoven fabric of nylon, vinylon, acrylic resin, polyester or glass by plating or other method is used. Can be. Among them, the nonwoven fabric has good familiarity with the backing concrete, the backing concrete enters the gaps between the fibers, and is excellent in the adhesive strength between the nonwoven fabric and the backing concrete.

As the conductive mesh, a metal mesh such as stainless steel or aluminum, or a nonmetal mesh such as carbon fiber can be used.
An adhesive material having a rubber elasticity and having a buffering action, such as a liquid epoxy resin, a silicone resin, a modified silicone resin, a polysulfide resin, and a rubber resin, is suitable. The adhesive layer 4c can be formed of butyl rubber, acrylic rubber, rubber asphalt, silicone rubber, or the like. Such an adhesive layer 4c has good adhesion to the decorative panel 3 and the backing concrete 3. The elasticity of the adhesive and the adhesive layer contributes to follow the behavior of the backing concrete such as drying shrinkage, thermal expansion, heat shrinkage, and cracking.

The conductive layer 4 may be formed by applying an elastic conductive adhesive 4d to the entire back surface of the decorative panel 2 (FIG. 3). As such a conductive adhesive 4d, silicone or the like having conductivity can be used, and the conductive adhesive has a followability to the shearing of the conductive layer 4, and follows the behavior of concrete, Durability of the electrical connection can be ensured. Such a conductive adhesive also has an effect of preventing the fragments from being scattered when the decorative panel is broken.

A primary waterproofing material 5 and a secondary waterproofing material 6 are loaded on joints of the decorative panels 2 arranged in parallel, and a first conductive connecting member 7 is provided so as to cover and hide the secondary waterproofing material 6. First
The conductive layers 4 and 4 of the adjacent decorative panel 2 are connected by the conductive connection member 7.

The primary waterproof material 5 can be a gasket (FIG. 4) or a sealing material (FIG. 5). The gasket includes chlorosulfonated polyethylene rubber (C
SM), silicone rubber, chloroprene rubber, ethylene propylene rubber, and other waterproof and elastic materials can be used. Examples of the sealing material include epoxy resins, modified silicone resins, silicone resins, and polysulfide resins. What has waterproofness, adhesiveness, and elasticity can be used.

As the secondary waterproofing material 6, an elastic adhesive such as a modified silicone resin, a silicone resin, a polysulfide resin, or the like, or a resin such as a polyester resin, a nylon resin, a vinylon resin, or a glass is used. In some cases, a material having elasticity in which an adhesive layer formed of butyl rubber, acrylic rubber, rubber asphalt, silicone rubber, or the like is integrated is used.

As in the case of the conductive layer 4, the first conductive connection member 7 can be coated with the above-mentioned conductive adhesive tape or conductive elastic adhesive. Also, omit the secondary waterproof material,
The secondary waterproof layer can also be formed with the adhesive layer of the conductive adhesive tape. Incidentally, the adhesive layer in the case of a conductive adhesive tape,
Conductive ones can be used.

An edge fitting 8 is arranged on a peripheral side surface of the backing concrete 3. The edge fitting 8 is connected to the conductive layer 4 of the decorative panel 2 by the second conductive connecting member 9. As the second conductive connection member 9, a member similar to the first conductive connection member 7 is used.

The edge fitting 8 has an anchor portion 8a for embedding in the backing concrete 3 and an edge portion 8b surrounding the peripheral side surface of the backing concrete 3.
b has various shapes such as a sash bar type (FIG. 6), a rail type (FIG. 7), and a so-called deep joint type.

When the PC board thus obtained is applied to the outer wall of the building, the conductive filling member 10 is inserted into the joint of the PC board 1, whereby the edge fittings 8 of the adjacent PC boards are connected to the conductive filling member. They are electrically connected (FIGS. 7 and 8). The conductive filling member 10 includes a conductive gasket 10.
a, conductive backup 10b, conductive sealing can be used.

In the case where the PC plate is arranged below the glass window 11 provided with conductivity, the conductive filler member 10 is inserted between the metal window frame 12 and the PC plate forefoot to thereby make the PC plate smaller. Electrical connection between the plate and the glass window 11 can be ensured (FIG. 9).

The conductive gasket 10a can be made of conductive silicone, a conductive elastomer compound, Schlegel, a metal mesh, or the like. The conductive backup 10b can be made of carbon fiber felt or metal fiber. Silicone or the like having conductivity can be used for the conductive sealing.

P with decorative panel shown in FIGS. 11 and 12
C-board 1 is pre-cast concrete 1 applied to decorative panel 2
The conductive layer 4 is interposed between the concrete 3 and the post-cast concrete 14. In the PC board shown in FIGS. 11 and 12, the material of the conductive layer 4, the edge fittings and the second conductive connecting members (not shown) are the same as those described in the above embodiment, and thus the illustration and description are omitted. . After the solidification of the precast concrete 13, the conductive layer 4
3 and then post-cast concrete 14 is applied. According to this embodiment, since it is not necessary to provide a conductive layer on each back surface of the decorative panel 2, it is easy to apply a small tile or the like instead of a large ceramic plate or the like like the decorative panel 2. Concrete finishing without using decorative panels or the like can also be used.

The radio wave absorbing plate 1 is placed in the precast concrete 13.
5 may be added (FIG. 12). Thereby, a radio wave absorbing function can be provided. The electromagnetic wave absorbing plate 15 can be made of a known magnetic material such as MnZn ferrite or NiZn ferrite. In FIG. 12, reference numeral 16 denotes a reinforcing bar.

[0032]

As is apparent from the above description, according to the electromagnetic wave shielding PC board having the above-described structure and the building outer wall structure using the PC board, a conductive layer is previously applied in a PC board manufacturing plant. Therefore, the electromagnetic wave shielding performance can be checked in the factory, and the adjacent P on the building outer wall can be checked.
In addition to the advantage that the electrical connection between the C plates can be achieved by a simple operation of inserting the conductive filling member, the following effects are obtained.

That is, since the conductive layer is sandwiched between the decorative panel or the pre-cast concrete and the backing concrete, there is no fear that the conductive layer is damaged during transportation of the PC board.
Eliminates the problem of reduced electromagnetic wave shielding performance.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a PC board according to the present invention.

FIG. 2 is a cross-sectional view showing another form of the conductive layer of the PC board according to the present invention.

FIG. 3 is a cross-sectional view showing still another embodiment of the conductive layer of the PC board according to the present invention.

4 is a cross-sectional view of the PC panel of FIG. 3 at a decorative panel joint.

FIG. 5 is a cross-sectional view showing another form of the decorative panel joint of the PC board of FIG. 3;

FIG. 6 is a sectional view showing a peripheral side surface of the PC board of FIG. 3;

FIG. 7 is a sectional view showing another form of the peripheral side surface of the PC board of FIG. 3;

FIG. 8 is a sectional view showing still another embodiment of the peripheral side surface of the PC board of FIG. 3;

9 is a cross-sectional view showing an example in which the PC board of FIG. 8 is applied to the lower part of a glass window provided with conductivity on the outer wall of a building.

10 is a cross-sectional view showing an example in which the PC board of FIG. 3 is applied to an outer wall of a building as a half PC board.

FIG. 11 is a sectional view showing another embodiment of the PC board according to the present invention.

FIG. 12 is a sectional view showing still another embodiment of the PC board according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 precast concrete board 2 decorative panel 3 backing concrete 4 conductive layer 7 first conductive connecting member 8 edge fitting 9 second conductive connecting member 10 conductive filling member 13 pre-cast concrete 14 post-cast concrete 15 radio wave absorbing plate

Claims (6)

(57) [Claims] 1. A precast concrete plate with a decorative panel in which a backing concrete is applied to a parallel body of decorative panels arranged on the same plane in a process, comprising a conductive layer between each of the decorative panels and the backing concrete. The conductive layers of adjacent decorative panels are connected by a first conductive connecting member, and an edge fitting connected to the conductive layer by a second conductive connecting member is fixed to a peripheral side surface of the backing concrete. Precast concrete board with electromagnetic wave shielding. 2. The conductive layer and the first and second conductive connecting members are made of a conductive fiber or a conductive mesh attached to an object to be attached with an elastic adhesive, or a conductive member with an adhesive layer. By conductive fiber or conductive mesh,
2. The precast concrete plate according to claim 1, wherein the precast concrete plate is made of a conductive elastic adhesive. 3. A precast concrete plate in which a conductive layer is interposed between precast concrete, tiled precast concrete or concrete finish precast concrete applied to the back surface of a decorative panel, and post-cast concrete. A precast concrete plate, wherein an edge fitting connected to the conductive layer by a second conductive member is fixed to a peripheral side surface of the cast concrete and / or the post-cast concrete. 4. The conductive layer and the second conductive connecting member,
Conductive fiber or conductive mesh attached to the mounting object with an elastic adhesive, conductive fiber or conductive mesh with an adhesive layer, or conductive elastic adhesive The precast concrete plate according to claim 3, characterized in that: 5. The precast concrete plate according to claim 3, wherein a radio wave absorbing plate is buried in the precast concrete. 6. An electromagnetic wave shielding building outer wall structure in which the precast concrete plate according to claim 1 is fixed to a building, wherein a conductive filler is inserted into joints of the adjacent precast concrete plates. An outer wall structure of an electromagnetic wave shielding building, wherein edge fittings of adjacent precast concrete plates are connected by the conductive filler.