JP2969576B2 - Precast concrete wall to prevent radio interference - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete wall for preventing radio wave interference such as a television screen generated by radio waves reflected irregularly from the outer wall of a building.

[0002]

2. Description of the Related Art In an area where high-rise buildings are densely packed, ghosts appearing on a television screen in a double-triple manner due to radio waves irregularly reflected from the outer walls of the buildings, and many complaints from TV viewers in the vicinity have occurred. Brought to the side. Therefore, in order to prevent irregular reflection of radio waves from the outer wall of the building and to prevent annoying TV viewers, radio wave prevention walls using radio wave absorbing materials have been used for the outer walls of the building. However, since the radio wave absorbing material is very expensive, ranging from 40,000 to 80,000 yen per square meter, there has been a problem that the cost of building the building has been increased and its spread has been hindered.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has been made to solve the above problems, and has been made to reduce the cost of a radio interference prevention wall without deteriorating radio wave absorption performance. It is an object of the present invention to provide a precast concrete wall capable of preventing radio wave interference.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for preventing radio interference by embedding a radio wave absorbing / reflecting material.
A precast concrete wall, wherein said radio wave absorbing reflection
The material is made up of a plurality of plates that are arranged side by side with gaps in the vertical direction.
The radio wave absorber and the radio wave absorber are disposed in close proximity to each gap.
And a vertical V-shaped radio wave reflecting member
It is characterized by:

[0005]

The radio waves hitting the plate-shaped radio wave absorbing material of the precast concrete wall of the present invention are absorbed by the radio wave absorbing material as it is, and the radio waves entering each gap of the radio wave absorbing material are close to each gap . The beam is reflected in the direction of the radio wave absorbing material on the arranged radio wave reflecting vertical member having a V-shaped cross section, and is absorbed by being hit on the vertical direction. Therefore, despite the fact that the radio wave absorbing material is arranged in parallel with a gap, the same radio wave absorbing performance as the radio wave absorbing material of the entire cover can be obtained, and the material can be reduced by the amount of the gap, and the material of the expensive radio wave absorbing material is used. Costs can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a cross-sectional plan view of a precast concrete wall for preventing radio interference according to the present invention. The precast concrete wall 1 for preventing radio interference according to the present invention is provided on the surface side of a precast concrete 2 with a ferrite plate, a tile or the like having a width a. The plate-shaped radio wave absorbing material 3 is arranged in the vertical direction, that is, in the magnetic field direction m, with a gap b arranged in the horizontal direction, that is, in the electric field direction e, and has a V-shaped cross section behind each gap b of the radio wave absorbing material 3. The radio wave absorbing / reflecting material 5 provided with the vertical radio wave reflecting material 4 is embedded in the precast concrete 2.
The V-shaped angle of the radio wave reflector 4 and the porosity of the radio wave absorber 3, that is, (b / a + b) × 100 (%), are optimal values in consideration of the incident angles of various radio waves to the building wall. Usually, the porosity can be 35% or more. 6 and 7 in the figure are precast concrete 2
The radio wave reflecting member 4 is attached to the horizontal streak 6 with a wire 8 before the precast concrete 2 is cast. Reference numeral 9 denotes a wall finishing material such as a stone material or a tile that is constructed when the precast concrete wall 1 for preventing radio wave interference is manufactured at a factory or installed on site. In the above configuration, the radio wave W directly hitting the radio wave absorber 3 is directly absorbed by the radio wave absorber 3, and the radio wave W ′ having entered each gap b of the radio wave absorber 3 hits the radio wave reflecting vertical member 4 and The light is reflected in the direction of the absorber 3 and is absorbed by the light.

FIG. 2 shows a V-shaped metallic radio wave reflecting vertical member 4.
Is shown in each of the gaps b of the radio wave absorbing member 3, and the reference numerals and operations of other components and components are exactly the same as those of the embodiment of FIG.

FIG. 3 shows an embodiment in which a natural stone material is used for the exterior. In this embodiment, a radio wave absorbing material 3 is put on the surface of a precast concrete 2 and a V-shaped metallic radio wave reflection vertical. The tip of the fixing metal 10 embedded in the precast concrete 2 is taken out from the hole made in the material 4, and the exterior stone material 11 is fixed to this. In the figure, reference numeral 12 denotes a metallic reflection net placed behind the radio wave reflective vertical member 4 as a backup material. The operation of this embodiment is exactly the same as that of the above embodiment.

[0009]

As described above, the precast concrete wall for preventing radio wave interference according to the present invention has a vertical gap.
And a plurality of plate-shaped radio wave absorbers
V-shaped radio wave counters arranged in close proximity to each gap
Since the radio wave absorbing material is provided with the projectile material , the radio wave absorbing material can obtain the same radio wave absorbing performance as the radio wave absorbing material of the whole cover, even though the gap is arranged in parallel, and the material is reduced by the gap. As a result, material costs for expensive radio wave absorbers can be reduced,
The cost of the radio interference prevention wall can be reduced. Interruption
The adoption of a vertical V-shaped radio wave reflecting member allows for a V-shaped section
Depending on the angle and arrangement position of the vertical wave reflecting vertical member , it passes through the gap
Radio waves can be effectively reflected by radio wave absorbers,
The amount of metal used to construct the radio wave reflection vertical material can be reduced,
Since a plurality of radio wave reflecting vertical members are arranged at intervals,
Has the advantage of good cleat adhesion
Things.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of one embodiment of the present invention.

FIG. 2 is a plan sectional view of another embodiment of the present invention.

FIG. 3 is a plan sectional view of still another embodiment of the present invention.

[Explanation of symbols]

 1 Precast concrete wall to prevent radio wave interference 2 Precast concrete 3 Radio wave absorbing material 4 Radio wave reflecting vertical material 5 Radio wave absorbing reflecting material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05K 9/00

Claims (1)

(57) [Claims] 1. An electromagnetic interference caused by burying a radio wave absorbing / reflecting material.
Precast concrete wall for preventing radio wave absorption
The reflective material is made up of multiple
Place a plate-shaped radio wave absorber in close proximity to each gap between the radio wave absorbers.
And a vertical V-shaped radio wave reflecting member
Precast conch for preventing radio interference
Riet wall.