JPH0682944B2 - Electromagnetic wave shielding structure in the building frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic wave shielding structure in a reinforced concrete frame such as a wall of a building such as an RC structure or a slab.

[Prior art and its problems] Generally, in and out of buildings such as offices, hospitals, schools, shops, factories and warehouses, various kinds of information communication such as transceivers, telemeters, remote controllers, computers and communication terminals. The equipment is in use.

However, for example, noise radio waves propagating from an external power line or noise radio waves from a motor in a building may interfere with the above-mentioned information communication equipment in a building through a substation or indoor power wiring, or by an external communication line. Also interferes with the above information and communication equipment through indoor communication wiring.

In addition, external noise radio waves are introduced into the building through the air conditioning duct, and interfere with the information communication device.

Further, radio waves emitted from a mobile radio station or a fixed radio station, which is a strong radio wave source, also cause interference with information communication equipment.

Due to the above reasons, highly reliable information transmission using radio waves is currently impossible.

On the other hand, radio resources are limited, and the number of available radio channels is limited to about 10 to 100 channels. Therefore, if a large number of information communication devices are to be used, interference will occur between the information communication devices, and as a result, the number of information communication devices that can be used at the same time will be limited. There is a problem with radio waves, such as having to wait until the use of the radio waves ends, and the radio waves cannot be effectively used.

Regarding the effects on humans inside and outside the wireless transmission facility, only Japan has not been studied in developed countries, and no legal regulation or measures have been taken. Therefore, it is considered that the human body is affected by various physiological effects in the long term by the radio waves from the wireless transmission facility.

As described above, despite the fact that the building has obstacles due to internal and external electromagnetic waves, there is no large-scale building that shields the entire building, and a building that takes these measures is slightly anechoic. Although it is limited to a special purpose such as a so-called laboratory, the wall used for shielding is assembled separately from the construction structure and the construction cost is very high.

In addition, as a slab structure for electro-sulfur wave shielding, there is one in which rebars are electrically conductively connected by welding etc., but since it is necessary to weld all rebars arranged vertically and horizontally at intervals of 100 to 200 mm, many The time and high working accuracy were required.

Further, in the conventional electromagnetic wave shield, in order to maintain the conductivity in the connection portion, it is necessary to give sufficient consideration to rust prevention, and as a result, there are problems such as a very complicated structure in the connection portion. there were.

[Object of the Invention] The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to effectively shield electromagnetic waves with a very simple structure and to improve durability. Another object of the present invention is to provide an electromagnetic wave shielding structure in the frame of a building, which not only has but also can be constructed inexpensively and quickly.

[Structure of the Invention] In the electromagnetic wave shielding structure in the building frame of the present invention, the vertical members and the horizontal members are arranged in a grid pattern in the reinforced concrete structure body so as to be sufficiently attenuated with respect to the wavelength of the electromagnetic waves to be shielded. In the electromagnetic wave shielding structure in the body of the buried building, the wire nets are conductively connected so that their end portions overlap each other in the electromagnetic shielding structure in the structure of the buried building, and the vertical members at each end of the adjacent wire nets. It is characterized in that they are arranged and connected so that the distance between them or between the horizontal members is smaller than the pitch between the vertical members or the horizontal members of each wire mesh.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a wire mesh having an electromagnetic wave shielding function, which is usually factory manufactured to have a certain size, and the number of field connections can be reduced as much as possible.

The wire netting 1 is made conductive by arranging the vertical members 1a and the horizontal members 1b in a grid pattern and welding the respective contacts. The pitch p between the vertical members 1a and the pitch p between the horizontal members 1b are joined so as to maintain a sufficient attenuation distance according to the wavelength of the electromagnetic wave.

In order to connect the wire nets 1 to each other, the end portions of the longitudinal members 1a of one wire net 1 are overlapped with the cross members 1b located at the outermost part of the other wire mesh 1 so as to cross in a cross shape (enclosed portion A See), conductively connect. In this case, the adjacent horizontal members 1b of the wire netting 1 are connected so that the distance l is 1 <p (pitch).

The wire net 1 is attached to a reinforcing bar 2 of a frame such as a wall by a wire 3. It is recommended that the wire 3 be attached to one place per 1 m ² .

The wire mesh 1 attached to the rebar 2 is finally made of concrete 4
It has a rust prevention effect.

As shown by B in FIG. 2, the skeleton containing the wire mesh 1 is
By arranging it in a portion facing the outside of the building, it is possible to make the outside and inside of the building different radio fields.

Further, as shown by C in FIG. 2, by arranging the skeleton containing the wire mesh 1 on the inside of the building and on the boundary wall or floor, it is possible to provide a radio field that does not interfere with each other inside the building. In this way, radio waves can be shielded inside the building frame, and it has become possible to construct a highly durable electromagnetic-shielding building that is as large as the building scale.

[Effects of the Invention] An electromagnetic wave shielding structure in a structure of a building in which a wire mesh in which a vertical member and a horizontal member are arranged in a grid pattern so as to be sufficiently attenuated with respect to the wavelength of an electromagnetic wave to be shielded is embedded in a reinforced concrete structure. In the above, the wire meshes having a certain size are conductively connected so that the end portions thereof overlap each other, and the vertical members of the end portions of the adjacent wire meshes or the intervals between the horizontal members are vertical members of each wire mesh or Since it is arranged and connected so that it is smaller than the pitch of the horizontal members, it is not only easy to manufacture, transport and install the wire mesh, but also it is possible to secure a wire mesh with high quality and uniform electromagnetic wave shielding performance. It is possible to construct a reinforced concrete skeleton without fear of damage.

[Brief description of drawings]

FIG. 1 is a perspective view of an electromagnetic wave shielding structure of a building structure of the present invention,
FIG. 2 is an explanatory diagram showing an example of construction on a building. 1 ... Wire mesh, 1a ... Vertical material, 1b ... Horizontal material, 2 ... Reinforcing bar, 3
... wire, 4 concrete, p pitch, l
interval.

Claims (1)

[Claims] 1. An electromagnetic wave shielding structure in a structure of a building in which a wire mesh in which a vertical member and a horizontal member are arranged in a grid pattern so as to be sufficiently attenuated with respect to a wavelength of an electromagnetic wave to be shielded is embedded in a reinforced concrete structure. In the above, the wire meshes having a certain size are conductively connected so that the end portions thereof overlap each other, and the vertical members of the end portions of the adjacent wire meshes or the intervals between the horizontal members are vertical members of each wire mesh or An electromagnetic wave shielding structure in a building body, which is arranged and connected so as to be smaller than the pitch of the horizontal members.