JPH0452341A - Wave absorbing wall and tile unit - Google Patents

Abstract

PURPOSE:To easily construct a wall by arraying tiles on the surface of a body and stuffing joints formed of ferrite blocks in gaps between tiles to form the wall. CONSTITUTION:Tiles 14 are arrayed at equal spaces on connecting members 12 formed of conductive plates. Joints 16 formed of ferrite blocks are stuffed in gaps between the tiles 14, 14 and integrated with the tiles 14 via connecting members 12. In a wave absorving wall 18, units 10 formed in this way, are used to fix the tiles 14 on the surface of a concrete body 20 in a preset arranged state and to stuff the joints 16 formed of the ferrite blocks in gaps between the tiles 14. On the back side of the tiles 14 and the joints 16, the conductive connecting members 12 are placed to reflect electric waves coming from the outside there.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a radio wave absorbing wall and a tile unit.

(Background of the Invention) In recent years, the problem of interference with the reflection of television waves by high-rise buildings, that is, the problem in which television waves are reflected by the outer walls of high-rise buildings and overlap with the television broadcast waves, causing ghosts on the screen, has been attracting attention. As a countermeasure, the outer walls of high-rise buildings are configured as radio wave absorbing walls.

As this radio wave absorbing wall, a structure has been proposed in which a ferrite block as a magnetic material is buried inside a concrete frame, and a decorative material such as a tile is attached to the surface of the ferrite block.

In the case of a radio wave absorbing wall with this structure, normally, the tiles are arranged in a predetermined arrangement and the ferrite blocks are held at a predetermined position, and a fluid concrete material is poured into the formwork while applying vibration, and then hardened. This is manufactured by:

(Problem to be solved by the invention) However, in the case of a radio wave absorbing wall body having the above structure in which tiles as a decorative material and Zener/Itro as a radio wave absorber are arranged in two layers in the cross-sectional direction, construction is troublesome. and
There was also a problem in that the manufacturing cost of the wall body increased.

In addition, when pouring concrete materials or applying vibration, ferrite blocks tend to be chipped, damaged, or displaced from their placement positions, which significantly deteriorates the radio wave absorption properties of the wall. There were also problems with this.

(Means for Solving the Problems) The invention of the present application has been made for the purpose of solving such problems.

The first invention of the present application relates to a radio wave absorbing wall body, in which the tiles are arranged on the surface of the building frame so that the gaps between the tiles are continuous in at least one direction, and the gaps between the tiles are filled with ferrite blocks. Claim (1) characterized in that the wall surface is constructed by filling the joint bodies consisting of:
).

The second invention of the present application is to arrange the tiles on the surface of the flat connecting member so that the gaps between the tiles are continuous in at least one direction, and to fill the gaps between the tiles with a joint body made of ferrite blocks. Claim (2) characterized in that the tiles and the joint body are integrated with a connecting member.
)).

A third invention of the present application is characterized in that a joint body made of two ferrite blows having a length corresponding to the size of the tile is fixed along at least one side.
).

(Operations and Effects of the Invention) As described above, in the invention of claim (1), the tiles and the ferrite blocks are not arranged in two directions in the cross-sectional direction of the radio wave absorbing wall, and the tiles and the ferrite blocks are placed in the wall. Since they are arranged side by side on the surface, construction of the wall is easy and the wall surface has a beautiful surface similar to a normal tile wall surface. In addition, unlike the case where tiles and ferrite blocks are arranged in two layers in the cross-sectional direction, it is possible to avoid unnecessary thickening of the wall.

In addition to this, the radio wave absorbing wall of the present invention has an excellent feature of being able to absorb radio waves over a wide frequency band.

When constructing a radio wave absorbing wall using ferrite, it is common to lay the wall all over the wall without any gaps.

On the other hand, ferrite blocks are arranged in a continuous manner in at least one direction (the direction of the magnetic field component of the radio wave) with a predetermined gap between them, and an insulating material with a low dielectric constant is placed between the ferrite blocks. It has been confirmed that when interposed, the properties of the incoming radio waves are changed and then absorbed, making it possible to absorb radio waves over a wide frequency band.

In this respect, the radio wave absorbing wall of the present invention has the feature of absorbing radio waves over a wide band because the ferrite blocks are arranged at predetermined intervals and continuous in at least one direction.

Note that the effect of widening the band of radio wave absorption naturally changes depending on the gap between the ferrite blocks, that is, the size of the tile, the material of the tile, etc. Therefore, the size and material of the tile may be appropriately selected depending on the required radio wave absorption performance and the aesthetic appearance of the wall surface.

In the wall of the present invention, there is no obstacle to radio wave absorption on the front surface of the ferrite block, so
It also has the advantage of being able to absorb radio waves well over a wide band.

In the present invention, it is sufficient that the ferrite joints are continuous in at least one direction.If the ferrite joints are continuous in one direction in this way, radio wave absorption can be performed satisfactorily. However, it is of course possible to configure such ferrite joints to be continuous in two orthogonal directions.

Next, the invention of claim (2) connects joint bodies made of tiles and ferrite blocks arranged in a predetermined state by a connecting member to form a unit, and by using such a unit, the above-mentioned It becomes possible to manufacture radio wave absorbing walls more easily.

In addition, since such a unit can be manufactured at the factory stage, quality control is facilitated, and the tiles and ferrite blocks can be neatly arranged in advance.

In addition, when manufacturing a radio wave absorbing wall using such a unit, when pouring concrete material into the formwork and applying vibration, ferrite blow 2
This can effectively prevent damage such as cracks or misalignment. This is because the ferrite block is embedded in the gap between the tiles, which prevents pressure and impact from directly acting on the ferrite block when pouring concrete material.

Since the unit of the present invention can absorb radio waves over a wide band, it can be used not only for the above-mentioned wall for absorbing radio waves, but also for use in an anechoic chamber. Here, the anechoic chamber is used as a room to measure the amount of radio waves generated by various devices that serve as radio wave sources, and the frequency of the radio waves generated ranges over a very wide range. Since it can absorb radio waves, it can be suitably used for such radio anechoic chambers.

The invention of claim (3) relates to a tile, and by using the tile of the present invention, there is an advantage that the tile unit or the radio wave absorbing wall can be easily manufactured.

(Example) Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 10 denotes a tile unit, in which tiles 14 are arranged at predetermined intervals on a connecting member 12 made of a conductive flat plate. The gap between the tiles 14 is filled with a joint body 16 made of ferrite blocks.
These are integrated with tiles 14 by connecting members 12. Here, the joint body 16 extends continuously in two directions orthogonal to each other.

Figure 2 shows an example of a radio wave absorbing wall constructed using this unit) 10. As shown in the figure, this radio wave absorbing wall 1
8, tiles 14 are fixed to the surface of a concrete body 20 in a predetermined arrangement, and the gaps between the tiles 14 are filled with joint bodies 16 made of ferrite blocks. A conductive connecting member 12 is placed on the back side of the tile 14 and the joint body 16, so that radio waves arriving from the outside are reflected here.

Reference numeral 22 denotes reinforcement embedded inside the concrete frame 20.

In the case of this radio wave absorbing wall 18, the appearance is completely the same as that of a normal tile wall surface, and has a good aesthetic appearance. In addition, the cross-sectional structure is similar to that of conventional tile walls, and construction is easy. When constructing a radio wave absorbing wall with a similar structure, it is also possible to separately fix the tiles 14 and the joint material 16 made of ferrite blocks to the surface of the building structure, but it is possible to use the UNIF 10 as described above. By carrying out the construction, such a radio wave absorbing wall body 18 can be easily manufactured.

In addition, when such a unit 10 is used, such units 10 can be uniformly manufactured at the factory stage, so quality control is easy, and the arrangement of the tiles 14 and joint bodies 16 made of ferrite blocks can be arranged with high precision. They can be neatly positioned and arranged in advance. Therefore, when the radio wave absorbing wall 18 is manufactured using such a unit 10, the appearance of the wall surface can be finished well.

In the unit IO of this example, the ferrite materials are not completely continuous in the vertical and horizontal directions, and the tiles 14 are interposed between the ferrite materials.

Therefore, the unit 10 or a wall using the same has the advantage of being able to absorb incoming radio waves over a wide frequency band. Therefore, the unit 10 of this example can be used not only as an outer wall of a high-rise building for absorbing television radio waves, but also as a wall for an anechoic chamber.

Note that the connecting member on the upper side does not necessarily have to be a conductive material, but may be made of a resin or rubber material with or without flexibility, as long as it can connect at least the tiles and the ferrite blocks. case,
The radio wave reflecting layer will be provided inside the concrete body separately from the tiles and ferrite blocks.

In addition, when the connecting member is formed of non-conductive resin, rubber material, etc. in this way, it is also possible to arrange the connecting member on the front side of the tile and ferrite block.

In addition, when the connecting member is placed on the front side like this (there may be a separate connecting member on the rear side), the front side connecting member can be peeled off and removed from the wall during or after manufacturing the wall. You may also let them do so.

FIG. 3 shows an example of a tile suitable for manufacturing the unit 10 or the radio wave absorbing wall 18. Ii? (A
) has a ferrite block 16 corresponding to the size of one tile fixed together by sintering along one side of the tile 14, and the one shown in FIG. Ferrite pro along two orthogonal sides... Ri 1
6 are fixed together by sintering.

In the case of FIG. CA), a ferrite joint extending continuously in one direction can be formed between the tiles 14 by simply arranging the tiles 14 without gaps. In the case of CB), if the tiles 14 are arranged without gaps, ferrite joints can be formed that extend continuously in both the vertical and horizontal directions.

Although the embodiments of the present invention have been described in detail above, in the present invention, for example, an appropriate material can be selected and used as the tiles 14, and foam tiles can also be used depending on the case. In this case, the dielectric constant of the tile becomes smaller, which not only has the effect of widening the radio wave absorption characteristic but also improves the heat insulation properties of the wall surface.

This Ikemizu invention can be modified in various ways based on the knowledge of those skilled in the art without departing from the spirit of the invention, such as the possibility of providing joints made of ferrite blocks extending in the diagonal direction of the tiles. It is possible.

[Brief explanation of drawings]

Fig. 1 is a diagram of a tile unit which is an embodiment of the present invention, Fig. 2 is a cross-sectional view of a radio wave absorbing wall using the tile unit, and Fig. 3 is a perspective view of a single tile. . 1O: Tile uniform return 14: Tile 16: Joint body 20: Concrete frame Figure 1

Claims (3)

[Claims] (1) The tiles are arranged on the surface of the building frame so that the gaps between the tiles are continuous in at least one direction, and the gaps between the tiles are filled with joints made of ferrite blocks to form the wall surface. A radio wave absorbing wall body featuring (2) Arrange the tiles on the surface of the flat connecting member so that the gaps between the tiles are continuous in at least one direction, and fill the gaps between the tiles with a joint body made of ferrite blocks to connect the tiles. A tile unit characterized by integrating a joint body with a connecting member. (3) A tile characterized in that a joint body made of a ferrite block having a length corresponding to the size of the tile is fixed along at least one side.