JPH0647844B2 - Radio wave absorption precast plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radio wave absorption precast plate used for a radio wave absorption wall.

(Prior Art) In Japanese Patent Application Laid-Open No. 62-144398, the inventors of the present invention have a plurality of leg pieces projecting from the back surface of a decorative plate, and the vertical direction of the decorative plate is placed between adjacent leg pieces. We proposed an electromagnetic wave absorption precast plate in which a reflective mesh was placed on the back surface of a decorative block in which a plurality of ferrite moldings were fitted so as to be continuous with each other.

(Problems to be Solved by the Invention) It has been experimentally proved that, in a ferrite-based molded product, a closer contact in the longitudinal direction has a great effect on the electromagnetic wave absorption performance. For this reason, as shown in Fig. 5, each ferrite-based molded body (a) was connected by a joint-like joint to improve the magnetic field porosity, but it took time and effort for construction.
Since the molded body was a small piece, the effect could not be expected so much.

Also, the leg pieces of the decorative block are embedded in concrete,
Although it is fixed, the ferrite molding has poor adhesion to concrete and is only sandwiched between the decorative plate and the concrete. Not good.

(Means for Solving Problems) The present invention has been proposed in order to solve such problems, in which a plurality of ferrite-based compact small pieces are pressure-bonded in the longitudinal direction, and A concrete-based molded plate is adhered via an adhesive over the back surface of each ferrite-based molded body piece to form a ferrite-based molded body unit, the ferrite-based molded body unit, through the concrete-based molded board, The present invention relates to a radio wave absorption precast plate characterized by being fixed to a reinforced concrete placed on the back surface of a plurality of ferrite-based molded body units laminated on the back surface of a precast decorative block.

(Operation) In the radio wave absorption precast plate according to the present invention, the magnetic field void ratio is improved and the radio wave absorption performance is improved by press-bonding a plurality of ferrite-based compact pieces in the longitudinal direction.

Further, by adhering a concrete molding plate over the back surface of each ferrite-based molded body piece connected as described above, a ferrite-based molded body unit was formed, and the unit was layered on the back surface of the precast decorative block. Therefore, not only the concrete block on the back of the block but also the concrete molding plate of the ferrite molding unit is attached to the decorative block so that the decorative block is firmly fixed to the concrete on the back and Each ferrite molded body piece of the system molded body unit also adheres to the back concrete through the concrete molded board.

(Effect of the invention) As described above, according to the radio wave absorption precast plate of the present invention, the ferrite-based molded body unit layered on the back surface of the precast decorative block is pressure-bonded in the longitudinal direction to thereby provide a magnetic field gap. Over the back surface of a plurality of ferrite-based compacts with improved rate, a concrete molding plate is bonded and configured, and through the concrete molding plate, the small pieces of the ferrite-based molding body are used to cast concrete on the back surface of the decorative block. Since it is firmly fixed, a high-performance electromagnetic wave absorption precast plate having a simple structure can be constructed.

(Examples) The present invention will be described below with reference to illustrated examples.

2 and 3 show a manufacturing apparatus for a ferrite-based molded body unit, in which a plurality of ferrite-based molded body small pieces (3) are continuously arranged on a mold (1) in the longitudinal direction to apply pressure. Pressure is applied in the longitudinal direction by the tool (4) to bring the end faces of the adjacent small pieces (3) into close contact with each other.

At this time, if a gap occurs between the adjacent small pieces (3),
A filler (5) containing ferrite powder and having adhesiveness is filled in the gap.

Then, as described above, a flat bar-shaped concrete molding plate (6) is bonded via an adhesive (7) on the ferrite-based molded product small piece (3) continuous in the longitudinal direction of the mold (1), and then Laminate a rubber sheet (8) and a crimping plate (9) on it, and further pressurize it via a crimping tool (10), and a concrete molding plate (6) on the back surface of each of the ferrite-based compact small pieces (3). Are integrally bonded to manufacture a ferrite type molded body unit (A).

(B) is a precast decorative block composed of concrete, reinforced fiber concrete, porcelain or porcelain tiles, and a pair of legs from the back of the flat decorative plate (11).
(12) is projected.

Then, the ferrite molded body unit (A) is fitted between the adjacent leg pieces (12) (12), and the bottom surface is bonded to the decorative plate (11) via the adhesive (13). Reference numerals (14) and (15) in the figure denote cushioning materials interposed between the both leg pieces (12) and the ferrite molded body unit (A).

In this way, the ferrite molding unit (A) is arranged on the back surface of the makeup block (B) arranged in advance, and a reinforcing material is provided between the tip surfaces of the leg pieces (12) of each makeup block (B). A reinforcing bar mesh (C) that also functions as a reflector is arranged, concrete (D) is cast on the back surface of each block (B) to form a precast concrete plate, and the plate is an electromagnetic wave absorbing wall body. It is used as a wall board of.

In the figure, (16) is a joint between the decorative blocks (B), and (17) is a flexible board interposed between the ferrite type molded body unit (A) and the reinforcing bar mesh (C).

Since the illustrated embodiment is configured as described above, via the leg pieces (12) protruding from the back surface of the decorative block (B),
Ferrite molding in the ferrite molding unit (A) in which the decorative block (B) and the concrete (D) on the back surface are integrated and fitted between the adjacent leg pieces (12) (12). The small body piece (3) is fixed to the cast concrete (D) on the rear surface of the decorative block (B) through the concrete molding plate (6) adhered over the rear surface of each small piece (3), and the unit described above. The small pieces (3) of ferrite-based compacts in (A) are pressure-bonded in the longitudinal direction, and together with the improved magnetic field porosity, a high-performance electromagnetic wave absorption precast plate is constructed.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing a use state of a radio wave absorbing precast plate according to the present invention, and FIGS. 2 and 3 are plan views showing a molding device of a ferrite type molded body unit, respectively, and longitudinal side views, and FIG. The figure is a perspective view of the ferrite molding unit.
FIG. 5 is a side view showing a joint portion of a small piece of a ferrite type molded body in a conventional radio wave absorption precast plate. (A) …… Ferrite molding unit (B) …… Precast decorative block (3) …… Ferrite molding small piece (6) …… Concrete molding board

Claims (1)

[Claims] Claims: 1. A plurality of ferrite-based compact small pieces are pressure-bonded in the longitudinal direction, and a concrete-based molded plate is adhered to the back surface of each ferrite-based compact small piece with an adhesive to form a ferrite-based compact. Reinforced concrete that forms a molded body unit and is cast on the back surface of a plurality of ferrite molded body units formed by layering the ferrite molded body unit on the back surface of the precast decorative block via the concrete molding plate. An electromagnetic wave absorption precast plate characterized by being fixed to.