JPH0544273A - Radio wave absorbing panel for glass curtain wall - Google Patents

Abstract

PURPOSE:To sufficiently display a radio wave absorption characteristic by screwing a ferrite plate having a through-hole on a fire panel, and placing an air layer in the front of the ferrite plate to provide a glass. CONSTITUTION:A through-hole 2 is formed in the center of a ferrite plate 1, and a screw 3 is inserted into the through-hole 2 to fix a fire panel and a metal plate 5 with a nut 6. In addition, and an air layer 7 is placed in the front of the ferrite plate 1 to fix a glass 8. Accordingly, the ferrite plate 1 is exposed to the air layer to place, so that a radio wave absorption characteristic can be sufficiently displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wave absorbing panel for a glass curtain wall which prevents unnecessary reflected electric waves in the VHF, UHF bands and the like.

[0002]

2. Description of the Related Art Recently, unnecessary reflected radio waves from high-rise buildings have become an obstacle to television broadcasting, and radio wave pollution such as ghosts on television screens has become a problem. As measures against this, various electromagnetic wave absorption walls in which a ferrite plate is embedded in the outer wall of a high-rise building have been proposed. A cross-sectional view of this conventional glass curtain wall is shown in FIG. In this conventional example, the ferrite plate 51 is fixed by sandwiching the ferrite plate 51 with a calcium silicate plate 52. This ferrite plate 51
The state of the arrangement of is shown in FIG. This ferrite plate 51 is
The spacers 53 are sandwiched and are arranged continuously in the vertical direction and discontinuously in the horizontal direction. A glass 55 is arranged and fixed on the front surface thereof via an air layer 54.

[0003]

In this conventional radio wave absorption panel for glass curtain walls, since the ferrite plate is sandwiched by the calcium silicate plates, the original radio wave absorption characteristics of the ferrite plate cannot be fully utilized. It was
In addition to the above-mentioned conventional example, a structure in which a metal-made holding plate is used to hold a ferrite plate has also been proposed. There was a problem that it got worse. The present invention has been made in view of the above circumstances, and an object thereof is to provide a radio wave absorption panel for a glass curtain wall having good characteristics.

[0004]

According to the present invention, a ferrite plate having a through hole is screwed to a refractory panel through the through hole, and a glass is arranged on the front surface of the ferrite plate with an air layer interposed therebetween. This is a radio wave absorption panel for a glass curtain wall. Further, the present invention, on the surface of the concrete in which the reinforcing material such as a reinforcing bar is embedded, a ferrite plate having a through hole is fixed by a fastener locked in the concrete through the through hole, It is a radio wave absorption panel for a glass curtain wall in which an air layer is arranged on the surface and glass is arranged.

[0005]

FIG. 1 is a sectional view of an embodiment according to the present invention. The arrangement of the ferrite plates in this example is shown in FIG. In this embodiment, a through hole 2 is formed in the center of a ferrite plate 1, and a screw 3 is passed through the through hole 2,
The screw 3 penetrates the fireproof panel 4 made of a calcium silicate plate and the metal plate 5 and is fixed with a nut 6, whereby the ferrite plate 1 is fixed to the fireproof panel 4.
In this embodiment, they are arranged continuously in the vertical direction and discontinuously in the horizontal direction. A glass 8 is arranged on the front surface of the ferrite plate 1 with an air layer 7 interposed therebetween. The glass 8 and the radio wave absorption panel may be fixed and attached by using ordinary glass curtain wall fixing and attaching means. As the screw 3 of this embodiment, a plastic screw is used so as not to reflect radio waves. This plastic screw has a conductivity of 1
Any material other than plastic may be used as long as the material is 000 (Ω-1 · cm-1) or less, and bolts may be used instead of screws. Further, the size is preferably M1.7 to M10. If it is less than M1.7, the strength is weak, and if it is M10 or more, the characteristics of the radio wave absorption panel are deteriorated. In addition, cut the tap groove on the calcium silicate plate,
A screw-in type that does not use a nut may be used.

A cross-sectional view of the second embodiment according to the present invention is shown in FIG. The glass portion is omitted. In this embodiment, a step portion is formed in the through hole of the ferrite plate 11, and the head portion of the screw is arranged in the ferrite plate 11 by the step portion.

FIG. 4 shows a plan view of a ferrite plate according to the third embodiment of the present invention, and FIG. 5 shows the arrangement thereof. In this embodiment, semicircular grooves 22 are formed on both sides of the ferrite plate 21.
Are formed. When the ferrite plates 21 are continuously arranged, the grooves 22 formed on the side surfaces are aligned and the through holes 23 are formed.
Will have the same structure as that formed. The ferrite plate 21 was fixed by passing a screw through the through hole 23.

FIG. 6 shows a sectional view of a fourth embodiment according to the present invention. In this embodiment, a through hole 33 is formed in the center of the ferrite plate 31, and the fastener 3 is attached to the through hole 33.
2 through which the ends of the fasteners 32 are opened, the ferrite plates 31 are arrayed continuously in the vertical direction and discontinuously in the horizontal direction, and concrete 35 is placed together with the reinforcing bar mesh 34 of the reinforcing material to form the panel Configured. A glass 37 was placed on the front surface of the ferrite plate 31 of this panel with an air layer 36 interposed therebetween. Fixing and mounting the glass 37 and the panel
A normal glass curtain wall fixing and attaching means may be used. Further, it is desirable to use a material that does not reflect the above radio waves for this fastener.

A sectional view of the fifth embodiment according to the present invention is shown in FIG. The glass portion is omitted. In this embodiment, the through hole 42 formed in the ferrite plate 41 has a shape in which the receiving port of the fastener 44 is tapered 43. A fastener 44 having a head that fits the receiving end of the tapered shape 43 is used. Further, in this embodiment, the cushion material 46 is arranged between the back surface of the ferrite plate 41 and the concrete 47. The cushion material 46 is arranged to absorb the difference in coefficient of thermal expansion between the ferrite plate 41 and the concrete 47. Further, in the concrete 47, a reinforcing bar mesh is integrally cast as a reinforcing material.

[0010]

According to the present invention, in the radio wave absorption panel for a glass curtain wall, the ferrite plate is arranged so as to be exposed in the air layer, so that the radio wave absorption characteristics of the ferrite plate can be sufficiently exhibited. .. Further, by using a screw for fixing the ferrite plate and a fastener made of a material that does not reflect radio waves, the reflection attenuation characteristic is not deteriorated by the screw and the fastener. Further, the ferrite plate can be securely fixed, and there is no risk of peeling due to the method of fixing with an adhesive.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a state of arrangement of ferrite plates according to an embodiment of the present invention.

FIG. 3 is a sectional view of a second embodiment according to the present invention.

FIG. 4 is a plan view of a ferrite plate according to a third embodiment of the present invention.

FIG. 5 is a diagram showing an arrangement state of ferrite plates according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a fourth embodiment according to the present invention.

FIG. 7 is a sectional view of a fifth embodiment according to the present invention.

FIG. 8 is a sectional view of a conventional example.

FIG. 9 is a diagram showing a state of arrangement of ferrite plates of a conventional example.

[Explanation of symbols]

 1, 11, 21, 31, 41 Ferrite plate 2, 23, 33, 42 Through hole 3 Screw 4 Fireproof board 5 Iron plate 6 Nut 7, 36 Air layer 8, 37 Glass 22 Semicircular groove 32, 44 Fastener 34 , 45 Reinforcing bar 35, 47 Concrete 46 Cushion material

Claims (2)

[Claims] 1. A glass curtain characterized in that a ferrite plate having a through hole is screwed to a refractory panel through the through hole, and a glass is arranged with an air layer interposed in front of the ferrite plate. Radio wave absorption panel for wall. 2. The surface of the ferrite plate, wherein a ferrite plate having a through hole is fixed to a surface of concrete in which a reinforcing material such as a reinforcing bar is embedded, by a fastener locked in the concrete through the through hole. An electric wave absorption panel for a glass curtain wall, characterized in that an air layer is placed between and glass is placed.