JPH083535Y2 - Radio wave absorption wall - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a radio wave absorption wall for preventing unnecessary reflected radio waves in VHF, UHF bands, etc., and in particular, can cope with a wide range of outer wall thicknesses of buildings and the like, and has improved workability during construction. It relates to a radio wave absorption wall.

[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.

Japanese Examined Patent Publication No. 1-45238 discloses that concrete is placed on the back surface of a decorative block in which a plurality of leg pieces are projected on the back surface of a decorative plate and a ferrite molding is fitted between the adjacent leg pieces. An electric wave absorption wall mounted integrally is disclosed. Figure 6
FIG. 3 is a sectional view showing an example of the radio wave absorbing wall. In this radio wave absorption wall, a ferrite plate 62 is arranged on a decorative block 61 having two legs 63, and concrete 65 is placed so that the tips of the legs 63 come into contact with the rebar mesh 64. .

Further, in Japanese Examined Patent Publication No. 1-45239, an L-shaped surface material composed of a horizontal piece and a vertical piece is placed in the slab concrete, and the horizontal piece is flush with the outer surface of the slab concrete. As described above, the ferrite-based molded body is carried on each of the horizontal parts, and the horizontal parts are connected to the rebar mesh supported on each of the vertical parts via a connecting member. The following radio wave absorption wall is disclosed. FIG.
It is a sectional view showing an example of this electric wave absorption wall. This electromagnetic wave absorption wall has a ferrite plate on the surface material 66 having a leg 68 on one side.
67 is arranged, the tips of its legs 68 are arranged so as to abut against the reinforcing bar mesh 70, and on the other side, a thin cord strip 69 is connected to the reinforcing bar mesh 70 and concrete 71 is cast.

[0005]

In such a conventional radio wave absorbing wall, it is necessary to lengthen a leg part for anchor for fixing to a concrete layer to some extent.
Therefore, there is a problem that the weight of the exterior material increases and the radio wave absorption wall becomes thick. Further, as shown in FIG. 7, when the thin cord strips are connected to the reinforcing bar mesh and fixed, the thin cord strips are connected to the reinforcing bar mesh in accordance with the number of exterior blocks, resulting in too many man-hours. There is.

In view of the above circumstances, the present invention has a structure in which long anchor leg portions are unnecessary and it is not necessary to connect thin cord strips to the reinforcing bar mesh, and the complexity of the manufacturing process is improved. It is intended to provide a radio wave absorption wall.

[0007]

As a result of earnest research in view of the above object, the inventors of the present invention have found that a radio wave absorbing wall formed by integrally fixing a ferrite plate to the back surface of an exterior tile and concrete together with a reinforced mesh. When a through hole is formed in the ferrite plate (or the exterior tile and the ferrite plate), the fastener is penetrated from the outside of the through hole, and concrete is placed, the exterior tile and the ferrite plate become concrete through the fastener. The inventors have found that the manufacturing process is simple because they are firmly fixed and do not need to be connected to the rebar mesh with a thin strip or the like, and have conceived the present invention.

That is, the first electromagnetic wave absorption wall of the present invention is
A ferrite plate is fixed to the back side of the exterior tile, and is integrally molded with concrete together with the reinforced mesh.
A through hole is formed in the ferrite plate, a fastener is inserted into the through hole from the exterior tile side, and the fastener is fixed to concrete, whereby the exterior tile is fixed. To do.

The second electromagnetic wave absorbing wall of the present invention is formed by fixing a ferrite plate to the back surface of the exterior tile and integrally molding it with concrete with a reinforced mesh. A hole penetrating the tile and the ferrite plate is provided, and a fastener is inserted into the through hole from the exterior tile side, and the fastener is fixed to concrete so that the exterior tile is fixed. Is characterized by.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing a radio wave absorbing wall according to an embodiment of the present invention. The radio wave absorption wall of this embodiment has an exterior tile 1 having a flat back surface to which a ferrite plate 3 is fixed, a fastener 9 inserted into a through hole 4 provided in the ferrite plate 3, and a joint portion of the exterior tile 1. 6 has a fastener 5 inserted into a through-hole 2 formed so as to penetrate both the exterior tile 1 and the ferrite plate 3, and these are fixed concrete (not shown). Fixed). A reinforced mesh (not shown) is arranged in this concrete layer. In this embodiment, a plurality of grooves 81 are formed on the surface of the exterior tile 1 to which the ferrite plate 3 is fixed. This groove 81 facilitates adhesion when temporarily fixing the ferrite plate 3 with an adhesive, and relaxes stress and the like caused by the difference in thermal expansion coefficient between the exterior tile and the ferrite plate.

Each of the through holes 2 and 4 has an enlarged diameter portion on the outside. An example thereof is shown in FIG. Expanded portion 21 of this through hole 2
The head portion 51 of the fastener 5 is engaged with the step portion 22 of the. A plurality (two in this embodiment) of legs 52 extend from the head 51 of the fastener 5. The head portion 51 and the leg portion 52 of the fastener 5 are made of metal and are integrally formed, and the leg portions 52, 52 are flexible so that they can be expanded outward. The same applies to the fastener 9.

A plurality of through holes 2 and 4 can be provided for each exterior tile 1. In the case of the through hole 4 of the ferrite plate 3, the ferrite plate 3 is fixed to the exterior tile 1 with the fastener 9 inserted in the through hole 4.

FIG. 2 shows an electromagnetic wave absorbing wall according to another embodiment of the present invention. In this embodiment, three ferrite plates 12a, 12b, 12c are fixed to the back surface of one exterior tile 11. The ferrite plates 12a, 12c on both sides have through holes 4a,
4c is provided, and the central ferrite plate 12b is provided with a through hole 2 for carrying the exterior tile 11. The through hole 2 has a diameter-expanded portion that opens at the joint portion 6 of the exterior tile 11. Fasteners 13a and 13c are inserted into the through holes 4a and 4c of the ferrite plates 12a and 12c, and a fastener 13b is inserted into the central through hole 2. After inserting the fastener 13b, the joint portion 6 is provided with the joint 14.

Grooves 15 for glazing are formed on both sides of the exterior tile 11, and a glazing 16 is inserted in each groove 15. The braces 16 are rod-shaped bodies or plate-shaped bodies having a substantially L-shaped cross section, and have a function of fixing the exterior tiles 11 by being fixed to the concrete after the concrete is poured.

FIG. 3 shows an electromagnetic wave absorbing wall according to still another embodiment of the present invention. In this embodiment, one ferrite plate 32 is fixed to one exterior tile 31, and one through hole 36 is formed in the ferrite plate 32. The fastener 33 is inserted into the through hole 36. Further, similar to the embodiment of FIG. 2, grooves 35 are formed on both side surfaces of the exterior tile 31, and a glazing 34 is inserted in each groove 35.

FIG. 4 shows an electromagnetic wave absorbing wall according to still another embodiment of the present invention. In this example, one exterior tile
One ferrite plate 42 is fixed to 41. The hole 45 penetrating the both is opened in the joint portion 46 and the through hole 45 is formed.
A fastener 43 is inserted in the. After inserting the fastener 43, a joint 44 is provided at the opening of the through hole 45. Also exterior tile 41,
Similarly, joints 44 are provided between 41 as well.

In the present invention, the inner diameter of the through hole may be, for example, about 6 to 8 mm in the case of the exterior tile 1 (120 mm x 120 mm) to which the ferrite plate 3 of 100 mm x 100 mm x 9 mm is fixed, and the leg of the fastener. The length of the part may be about 40 to 60 mm.

The present invention has been described above with reference to the accompanying drawings. However, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.

[0019]

EFFECTS OF THE INVENTION According to the present invention, a fastener for fixing an exterior tile can be easily attached without requiring long anchor legs, and the degree of freedom in wall thickness is increased, and workability of construction is improved. Is improved. Further, by appropriately setting the number and size of fasteners, it is possible to adapt to exterior tiles of various sizes.

Furthermore, in the electromagnetic wave absorbing wall of the present invention, if a large exterior tile is used and a plurality of ferrite plates are installed in one exterior tile, the number of exterior tiles used can be reduced. By this, the construction can be simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing a radio wave absorption wall according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a radio wave absorption wall according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a radio wave absorbing wall according to another embodiment of the present invention.

FIG. 4 is a sectional view showing a radio wave absorption wall according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a through hole of an exterior tile used in the radio wave absorption wall of the present invention.

FIG. 6 is a sectional view showing an example of a conventional radio wave absorption wall.

FIG. 7 is a cross-sectional view showing another example of a conventional radio wave absorption wall.

[Explanation of symbols]

 1, 11, 31, 41 Exterior tiles 2, 4, 45 Through holes 3, 12a, 12b, 12c, 32, 42 Ferrite plate 5, 9, 13a, 13b, 13c, 33, 43 Fastener 6, 46 Joint part 14 , 44 joints 15, 35 grooves 16, 34

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Tadao Naito 4-51 Nakagome Otamachi, Yokohama City, Kanagawa Prefecture Yokohama Branch, Kashima Construction Co., Ltd. (72) Creator Tatsuo Naito 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A radio wave absorbing wall formed by fixing a ferrite plate to the back surface of an exterior tile and integrally molding it with a reinforced mesh in concrete, wherein a through hole is formed in the ferrite plate, and the exterior tile is in the through hole. A radio wave absorption wall characterized in that the exterior tile is fixed by inserting a fastener from the side and fixing the fastener to concrete. 2. A radio wave absorbing wall, wherein a ferrite plate is fixed to the back surface of the exterior tile, and is integrally molded with concrete together with a reinforced mesh, and the joint portion of the exterior tile penetrates the exterior tile and the ferrite plate. A radio wave absorbing wall characterized in that the exterior tile is fixed by inserting a fastener from the exterior tile side into the through hole and fixing the fastener to concrete. . 3. The radio wave absorption wall according to claim 1, wherein a groove is formed in a side surface portion of the exterior tile,
A radio wave absorbing wall, wherein a ditch is fitted in the groove.