JPH0243359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an electromagnetic shielding structure.

[Prior art]

Conventionally, electromagnetic wave absorbers (ferrite tiles) have been pasted on building walls to prevent electromagnetic wave interference caused by high-rise buildings, such as ghost effects on television screens due to reflection of electromagnetic waves.

[Problems to be solved by this invention]

In recent years, office automation has progressed and various electronic devices have been introduced, but these devices are easily affected by external electromagnetic noise, and when performing wireless data communication between these devices in the office, it is necessary to It is necessary to prevent electromagnetic wave leakage to. However, so far, no structure has been realized that has a shielding function that actively prevents electromagnetic wave leakage from inside the building and inflow of electromagnetic waves from the outside, which poses new problems in advancing office automation. It was becoming.

SUMMARY OF THE INVENTION Therefore, the present invention solves the problems of the prior art as described above and provides an electromagnetic shielding structure having a shielding function that actively prevents leakage of electromagnetic waves from inside a building and inflow of electromagnetic waves from outside. With the goal.

[Structure of the invention]

This invention relates to fixing and connecting adjacent edges of a plate body made of metal or synthetic resin with excellent conductivity, or a mesh-like body at predetermined intervals, surrounding at least a room, and connecting the ends thereof. This is an electromagnetic shielding structure in which concrete is poured using the plate or mesh-shaped body as a core material, and is grounded with a ground wire.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to illustrated embodiments.

Figures 1a and 1b show a structure in which plate bodies 1a or mesh-like bodies 1c having excellent conductivity are electrically connected and concrete is poured.

In order to proactively prevent the leakage of electromagnetic waves from inside the building and the inflow from the outside, the entire building (a) is surrounded by highly conductive plates 1a or mesh-like bodies 1c and is poured with concrete. Figure b shows a partially formed shield chamber.

An embodiment using the plate 1a is shown in FIGS. 2a and 2b. Here, studs (anchor bars) 10 are provided at predetermined intervals on the plate 1a as shown in FIG.
It is shown that the edges of adjacent plates are joined with bolts 9 to make them continuous. Here, as shown in Figure b, a required number of studs (anchor bars) 10 were arranged in order to improve the compatibility with the concrete.

In addition, as shown in FIGS. 3a and 3b, one end of the plate 1b is bent left and right while punching holes are formed in the plate 1b using a press or the like in order to improve its fusion with the concrete.

In this case as well, the edges of adjacent plates are connected by bolts.

Other embodiments are shown in FIGS. 4 to 8.

Figures 4a, b, and c show wire rods 1c of a predetermined diameter arranged in a lattice shape at predetermined intervals, and the intersections of the wire rods 1c are processed by welding or the like to obtain sufficient electrical conductivity, and a desired structure is constructed. Arrange to build.
Here, as shown in Figure b, reinforcing bars 3 are attached to the required locations of the wire rod 1c and concrete is poured in order to improve the compatibility with the concrete.

Further, as illustrated in FIG. 3c, two layers of lattices made of wire rods 1c can be arranged in the thickness direction of the wall to enhance the shielding effect.

It is also possible to use the expanded metal 4 shown in FIG. 5a by pouring concrete 2 as shown in FIG.

In the embodiments shown in FIGS. 6a and 6b and 7a and 7b, the concrete 2 is placed by assembling flat bars 5 in a grid pattern.

Among these, in FIGS. 6a and 6b, the flat bars 5 are aligned in the width direction in the longitudinal direction of the wall body and are arranged in a lattice pattern.
In Figures a and b, the width direction of the flat bar 5 is aligned with the thickness direction of the wall body, and a lattice structure is formed so that the wall thickness corresponds to the frequency band to be shielded.

Further, the shielding effect can be enhanced by overlapping the expanded metal 4 illustrated in FIG. 8a as shown in FIG. 8b.

Considering the workability on site, it is desirable that the mesh-shaped plate 2 with excellent conductivity buried in the concrete be made into panels in advance at a factory and assembled on site.

Furthermore, it is desirable that the edges of these adjacent plates be joined by bolts or welding in order to electrically connect them.

In addition to the wire rods, expanded metals, and flat bars described above, perforated plates, conductive resins, cloth bodies, etc. can also be used, and it is particularly desirable to apply galvanization when using iron materials.

〔Effect of the invention〕

The embodiments of the electromagnetic shielding structure according to the present invention are as described above, and the following effects can be achieved.

A plate or mesh-like body placed in concrete becomes a part of the strength member of the structure, and can also serve as a shielding material for shielding electromagnetic waves. Furthermore, even when it is constructed, it can be carried out as efficiently as conventional techniques.

[Brief explanation of the drawing]

Figures 1a and b are cross-sectional views of a structure in which the first invention is implemented, Figures 2a and b are illustrations of an embodiment using the plate body of the first invention, and Figures 3a and b are similar to the holes in the structure. Figures 4a, b, and c are examples using wire rods. Figures 5a, b, and c are examples using expanded metal, and Figure 6 is an example using expanded metal. Figures a and b and Figures 7a and b are examples using flat bars, Figures 8a and b are examples of expanded metal stacking, and Figure 9 is experimental data. 1a...Plate body, 1b...Perforated plate body, 1c...
Wire rod, 2... Concrete, 3... Rebar, 4...
Expanded metal, 5...Flat bar, 6...
...Shield structure, 7...Shield panel, 8...
...End plate, 9...Bolt, 10...Stud (anchor bar).

Claims (1)

[Scope of Claims] 1. Adjacent edges of a plate body made of a highly conductive metal or synthetic resin, or a mesh-shaped body surrounding at least a room are fixed and connected at predetermined intervals, and An electromagnetic shielding structure, characterized in that the terminal end thereof is grounded by a ground wire, and concrete is cast using the plate or mesh-like body as a core material.