JPH09165856A - Radio wave transmissive wall surface structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the reflection of a radio wave as much as possible by forming at least the whole or almost all of a horizontal directional material of an opening part formed of a holding frame formed of vertical and horizontal directional materials out of a radio wave transmissive material. SOLUTION: A cross-sectional L-shaped bracket 10 is fixed to a mullion arranged lengthwise in the vertical direction, and a transom 2A composed of laminated lumber is horizontally installed and fixed between the bracket 10. Next, strip grooves 12 communicated in the lengthwise direction of a member are respectively formed on upper and lower surfaces on the outdoor side of the transom 2A. Next, hip parts 13a of zipper gaskets 13 are fitted to and installed in the strip grooves 12. Panel fitting grooves 13b are formed in the gaskets 13, and the peripheral edge of a panel P is fitted. Then, zipper materials 38 are fitted, and are fixed so that the panel P does not fall off. A drain hole 2a communicated from the strip grooves 12 is provided, and rainwater is discharged outdoors. An outdoor side surface of the transom 2A is covered with a silicon cover material. Therefore, almost all of incident radio waves enter indoors, and radio wave reflection jamming can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall surface structure configured to eliminate radio wave reflection from a wall surface as much as possible in order to prevent radio wave reflection interference due to buildings such as high-rise houses and buildings.

[0002]

2. Description of the Related Art In recent years, television radio interference such as ghost caused by radio wave reflection from high-rise houses and skyscrapers has become a social problem especially in urban areas. As a method for preventing the TV radio wave interference, there are a method of improving the directivity of the antenna, erasing in the TV receiver, and a method of attaching a radio wave absorber to the wall surface of the building. Further, in recent years, a concrete panel itself which has an electromagnetic wave absorption type has been developed.

The electromagnetic wave absorber is composed of a mixture of ferrite powder, carbon powder and rubber or various resins, and has a very excellent electromagnetic wave absorbing effect particularly in a high frequency band of 300 MHz or more. However, it does not always function effectively in the band of 90 to 220 MHz which is a normal television wave. Therefore, as a radio wave absorption panel for the VHF frequency band that has been proposed in the past, a ferrite tile, which has a high function as a radio wave absorber, is attached to the surface of a concrete slab as a radio wave absorber, and aesthetics are taken into consideration. Further, it is known that a granite, a ceramic plate, a tile, or the like is further attached as a decorative material on it.

[0004]

As described above, various types of radio wave absorption panels that have been proposed hitherto include the above-mentioned radio wave absorber integrally attached to a wall panel such as concrete or a steel plate, or a concrete plate. Most of them are mixed with ferrite powder or carbon powder, and most of the various proposals have been devised in how to attach them to the panel body such as concrete and its structure.

Heretofore, there has been no suggestion as to measures against radio interference when a wall surface is constituted by a glass panel surrounded by a metal frame or the like. this is,
This is because in the case of a building with many glass surfaces, radio waves generally pass through the glass surface and enter the room, and are diffusely reflected inside the room so that uniform reflected waves do not occur. This is because it is said that the influence of radio interference is less than that of a panel that is mostly reflected by the rebar net.

However, even if most of the wall surfaces are glass surfaces, the radio waves are actually reflected by the metal frame surrounding the glass, and the radio wave interference similarly occurs. Therefore, even in such a case, the radio wave interference is also eliminated. A method is required. In this case, the simplest method is to fix a ferrite plate, etc. on the found surface and the prospective surface of the glass frame, but use a radio wave absorber to prevent long-term peeling of frame materials with small dimensions. It is difficult to attach it, and even if the electromagnetic wave absorber is attached, it is a laborious work because it is a precise work.

Therefore, a main object of the present invention is to provide a radio wave transmission type wall surface structure in which a radio wave reflection is eliminated as much as possible in a curtain wall wall surface structure in which a panel such as glass is supported by a frame material. .

[0008]

In order to solve the above-mentioned problems, the present invention provides a wall structure in which a radio wave transmitting panel is fitted in each opening formed by a holding frame made of a vertical material and a horizontal material. In the above, at least all or most of the horizontal members are made of a radio wave transmitting material.

In this case, a laminated material or cement molding material can be used as the radio wave transmitting material. Also,
As will be described later, since the longitudinal material has almost no radio wave reflection, it is possible to prioritize the overall strength and use a metal material such as an aluminum alloy. The horizontal material and the panel material (such as glass) made of a radio wave permeable material can be housed in a resin gasket, an inner / outer sealing material, a fixed sealing material, or the like.

Further, a weakness of using the laminated wood outdoors by providing a weather-resistant coating on the surface of the holding frame portion made of a radio wave transmitting material including at least the horizontal material,
That is, it is possible to improve long-term durability and appearance.

On the other hand, for the purpose of the present invention, it is desirable not to use a conductor such as a metal material that reflects radio waves, but in a horizontal material using a radio wave transmitting material, the metal is within the allowable limit. Materials can be used. As an example of such a case, while using a laminated material or cement molding material as the horizontal material, the metal gasket support material substantially continuous in the member direction is provided on the outdoor side surface of this laminated material or cement molding material, A supporting structure for supporting the radio wave permeable panel via a radio wave permeable gasket attached to a metal gasket support material can be mentioned.

Here, in order to understand the present invention, a radio wave propagation mechanism will be described in detail. Radio waves are a type of electromagnetic waves and belong to the type with a longer wavelength, and are mainly used for television radio waves and ship radar. As shown in FIG. 11, the radio wave has an electric field E and a magnetic field H perpendicular to the direction of propagation, and these electric field E and magnetic field H are always perpendicular to each other. The case where the direction of the electric field E is parallel to the ground or the sea surface is called horizontal polarization, and the case where the electric field E is perpendicular to the ground is called vertical polarization. Normally, horizontal polarized waves with a long reach are used for television radio waves in large cities and radio waves for ship radar.

Regarding the reflection of such radio waves, the electric field E
The direction wave of is closely related. That is, when the radio wave is reflected on the boundary surface, the reflection of the electric field wave is dominant. This can be easily understood from the description of the antenna structure installed on the roof of a general household. As shown in FIG. 12, a main antenna 71 called a folded loop dipole antenna having a length of about ½ wavelength is arranged in the middle of the antenna, and the main antenna 71 is sandwiched in the direction of the radio wave. A director 72 is provided on the front side, and a conductive reflector 73 arranged in the electric field E direction for reflecting radio waves is provided on the rear side. The radio wave is directly received by the main antenna 71, and is also received by the main antenna 71 in a state where an electromagnetic field is strengthened by the radio wave being reflected by the rear conductive reflector 73. As for the antenna arrangement for the vertically polarized wave, the director 71, the main antenna 71, and the conductive reflector 73 are arranged in the vertical direction in accordance with the electric field E direction. From these matters, it can be seen that the electric conductor in the electric field E direction effectively reflects the radio wave.

Therefore, in the case of replacing with the wall panel from the above description, when compared with the point of radio wave reflection between the metal frame which is the conductive material arranged in the horizontal direction and the metal frame arranged in the vertical direction, the horizontal Since the directionally arranged metal frame coincides with the direction of the electric field E, it reflects incident radio waves well, while
Since the vertically arranged metal frame is perpendicular to the electric field direction, it hardly reflects radio waves. According to the knowledge of the present inventors, it has been found that the horizontally arranged metal material has a converted reflection area of about 4 to 5 times the actual width.

Therefore, in the present invention, as described above, at least the horizontal member of the holding frame composed of the vertical member and the horizontal member is mainly made of a radio wave transmitting material.
Specifically, the horizontal material in the wall panel is made of laminated wood or extruded cement molding. On the other hand, the longitudinal material can be an aluminum metal material in view of its small influence on radio wave reflection and in terms of overall strength.

As described above, in particular, when the horizontal material is a radio wave transmitting material, the radio wave reflectance of the wall panel can be effectively improved.

In such a case, the laminated wood is basically made of wood and has a problem of long-term durability, but the problem of coating the outdoor surface with a weather resistant resin such as silicone resin can be addressed. .

With respect to the horizontal material, a metal material such as aluminum can be used as long as it is within the allowable limit as described above. To determine the width of the aluminum material to be used, it is preferable to use an aluminum mold material that is actually used with a predetermined pitch and perform a radio wave reflectance test, and use a width whose reflectance is within the design reflectance. .

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a front view of a wall surface of a curtain wall according to the present invention, FIG. 2 is a view taken along line II-II of FIG. 1, and FIG. 3 is a view taken along line III-III of FIG.

As shown in FIG. 2, each floor slab 9, 9
, Which are vertically arranged, are supported by the anchor metal pieces 6, 6 provided at the outdoor end of the above, and the blind 2A passed between the uprights 3A, 3A.
Square openings are formed by 2A ... And the panels P, P ... Are fitted into these respective openings. In addition,
In the construction of the wall panel, a plurality of panels are grounded on the ground and erected as one erection unit.

First, as a first example, the seamless parts 2A, 2
A laminated material is used as the material of A ... so as not to reflect radio waves. Such a laminated material is obtained by laminating a sawing plate having a thickness of 30 to 35 mm with a synthetic adhesive to form one material.
It is generally used as a core material for structural materials, construction materials, and furniture because of its uniform quality and little deviation. In particular, since the structural laminated wood obtained by laminating and adhering the pulling boards so as to be parallel to each other in the fiber direction has a high structural resistance, the wall panel 1 according to the present invention can be used as the seamless 2A, 2A ... It can be used preferably.

In the following, a seamless 2 using the laminated wood
The panel support structure by A, 2A ... And the panel support structure by the upright 3A will be described in detail. Note that FIG. 4 is the same as that of FIG.
FIG. 5 is a view taken along the line IV-IV, FIG. 5 is a view taken along the line VV of FIG. 1, and FIG. 6 is a receiving view when the panel P is supported by a sealing material. As shown in FIG. 4, the attachment of the blind 2A to the uprights 3A and 3A is performed by a cross section L with respect to the uprights 3A and 3A arranged longitudinally in the vertical direction.
The bracket member 10 in the shape of a letter is fixed with screws 11a, 11a, respectively, and a seamless 2A made of laminated wood is laid across the bracket members 10 and 10 to form a wood screw 11.
b, 11b ... to fix it firmly.

As shown in FIG.
As shown in FIG. 3, there are formed continuous grooves 12 in the longitudinal direction of the member, and the bottoms 13a of the zipper gasket 13 made of silicon or neoprene are fitted into the grooves 12, 12, respectively. To be done. The zipper gasket 13 is formed with a panel fitting groove 13b facing the center of the opening, and the peripheral edge of the panel P is fitted into the panel fitting groove 13b.
The zipper members 38, 38 are fitted into the zipper fitting grooves 13c, 13c formed by pressing the zipper members 38, 38, respectively, and the panel P is fixed so as not to fall off. Further, a drainage hole 2a communicating with the upper groove 12 is formed in the seamless 2A so that rainwater or the like that has entered can be discharged to the outside of the room.

The outdoor side surface of the seamless 2A is made of a silicon cover material 1 in order to ensure weather resistance and to be beautiful.
It is covered by 4. For the attachment, the protrusions 14a and 14b are formed inside the opposing flange pieces of the cover material 14 formed in a substantially U-shaped cross section, and the engaging portions 15 are formed at corresponding positions on the seamless 2A side. The back surface side of the cover material 14 and the outdoor side surface of the seamless 2A are joined with an adhesive so as not to peel off, and the projections 14a and 14b of the cover material 14 are connected to the engaging portions 15 of the seamless 2A. By engaging it, it is firmly attached so that it will not fall out for a long period of time.

On the other hand, for supporting the panel P by the upright 3A, as shown in FIG. 5, the recesses 36, 36 are formed on the left and right sides of the upright 3A by the web 35 and the flanges 37, 37, respectively. The ridge 20 fitted in each of the recesses 36 forms a zipper gasket fitting groove 34 with the flange 37. Then, the bottom portion 13a of the zipper gasket 13 made of silicon or neoprene is fitted into the fitting grooves 34, 34 for the zipper gasket, and the panel fitting groove 13b facing the opening center side of the zipper gasket 13 is fitted. In contrast, panel P
Then, the zippers 38 and 38 are fitted into the zipper fitting grooves 13c and 13c formed in the zipper gasket 13 by pushing them, respectively, and the panel P is fixed so as not to fall off. In addition, the panel P
6 is supported by the backup material 23 and the sealing material 24 on both sides of the panel P with respect to the groove 12 formed in the seamless 2A, without using the zipper gasket 13, for example. Can also be constructed and supported. Reference numeral 22 is a setting block for holding the panel P at a predetermined height position.

Next, a second embodiment according to the present invention is shown in FIGS. The seamless 2B in the second example is common in that laminated wood is used as in the case of the first example,
A metal gasket support member 28 is used to support the panel P via the gasket. It is not preferable to use the metal material arranged in the horizontal direction from the point of the present invention, but it is also possible to arrange the metal material having a small width in the horizontal direction within the range of the allowable radio wave reflectance. As described in detail below, the seamless 2B includes a seamless main body 16 and a seamless separation piece 17 as shown in FIG. 7, and supports the gasket with respect to the bottom surface of the notched step 16a of the seamless main body 16. Member 28
After fixing the screw bolt 19 with the screw bolt 19,
An unseparated piece 17 is applied to 6a, and the gasket support member 28 is sandwiched and fixed by a screw bolt 18. The gasket support member 28 has a substantially horizontal position H on the outdoor side.
It has a gasket attachment portion 28a having a character shape and a width B, and the silicon gasket 29 is attached to the gasket attachment portion 28a.
After that, the panel P is fitted into the panel fitting grooves 29b, 29b formed in the upper and lower portions of the silicon gasket 29, respectively. And the silicon gasket 2
9, a substantially heart-shaped zipper fitting groove 29a,
The zipper members 40, 40 are fitted into the 29a by being pushed in, respectively, and are fixed so that the panel P does not fall off.

On the other hand, when the panel support structure by the upright 3B is schematically shown, as shown in FIG. 8, the silicon gasket 29 is attached to the gasket support piece 25 integrally formed at the outdoor end of the upright 3B. The side edge of the panel P is supported by this recon gasket 29.

Further, a third embodiment according to the present invention is shown in FIGS. 9 and 10. In the third example, a cement molding material is used as the material for the seamless 2C. Since the seamless 2C usually has a uniform cross section in the longitudinal direction and a long length, one produced by an extrusion molding method is preferably used. The seamless 2C includes a seamless body 50 and a ridge 51 as shown in FIG.
And the seamless body 50 has a lower panel fitting groove 50
a is formed in advance. An upper panel fitting groove 53 is formed by the ridge 51 fixed to the seamless body 50 by the tap pin screw 52 and the seamless body 50, and the panel P is sandwiched between the panel fitting grooves 50a and 53. The panel P is supported by the beads 54 and 55 attached so as to be attached.

The panel support structure based on the cubic 3C is shown in FIG.
As shown in FIG. 3, the ridge 20 attached to the upright 3C forms the panel fitting groove 56, and the side edges of the panel P are supported by the beads 54 and 55 attached to the panel fitting groove 56. It

As described above in detail, in the present invention, a radio-transparent laminated material or cement molding material is used as the horizontal material, which is a horizontal material. At the same time, a horizontal steel beam 5 such as a horizontal steel beam 5 supporting the floor slab 9 is used. Radio wave absorption processing is also performed on the material. Specifically, as shown in FIG. 2, as in the horizontal steel beam 5A portion shown on the upper side of the drawing, a radio wave absorption panel in which ferrite is attached to the outdoor side surface of a refractory material sprayed around the horizontal steel beam 5A. 8 can be fitted to prevent radio wave reflection, and like the horizontal steel aggregate 5B shown in the lower part of the drawing, the waist panel portion can be attached to the outer surface of the metal panel or concrete panel (including the PC plate) 7B. It is also possible to prevent radio wave reflection by inserting the radio wave absorption panel 7 to which the ferrite 7A is attached.

Next, the test results of the radio wave reflection loss test conducted on the laminated wood, the laminated wood + gasket support member, and the cement molding material which were used blindly in the present invention are shown.

[Experimental Example 1] In Experimental Example 1, a test was conducted on the electromagnetic wave reflection loss of the laminated wood used in the first embodiment without any treatment. Laminated wood with a width of 70 mm and a thickness of 100 mm is arranged horizontally at an interval of 1100 mm in the vertical direction, and 1
Radio waves of 00 MHz and 200 MHz were transmitted, and the reflection loss characteristics in that case were measured. As a result, a reflection loss of 30 dB or more (reflection 0.1% or less) is obtained for a radio wave of 100 MHz, and 25 dB for a radio wave of 200 MHz.
The above (reflection 0.3% or less) reflection loss was obtained. Similar results were also obtained when the laminated material had a thickness of 130 mm. From this, as expected, of course,
It can be seen that there is almost no radio wave reflection in the case of laminated wood.

[Experimental Example 2] In Experimental Example 2, the metal gasket support member 28 used in the second embodiment was tested for radio wave reflection loss. In the first experimental example, it was confirmed that there was almost no radio wave reflection loss of the laminated material, so only the gasket support member 28 was arranged. In the test, the gasket support member 28 having a width B of the gasket mounting portion 28a at the tip of 20 mm is 1100 in the vertical direction.
Horizontally arranged at mm intervals, 100 MHz and 200 MHz
The radio wave was transmitted and the return loss characteristics in that case were measured.
As a result, the reflection loss was about 7 dB (reflection about 20%) in the case of 100 MHz radio wave, and about 12 dB (reflection about 6%) in the case of 200 MHz radio wave. From this, it was confirmed that even a film having a width of 20 mm had some reflection. Therefore, it was verified that the width B needs to be carefully determined when the metal material of the bracket support member is used at all.

[Experimental Example 3] In Experimental Example 3, a test was performed on the radio wave reflection loss of the extrusion-molded cement material used as the blind in the third embodiment. Width 100 mm,
Laminated materials with a thickness of 100 mm were arranged horizontally in the vertical direction at intervals of 1100 mm, and radio waves of 100 MHz and 200 MHz were transmitted, and the reflection loss characteristics in that case were measured. as a result,
In the case of a radio wave of 100 MHz, 30 dB or more (reflection: 0.
A reflection loss of 1% or less) was obtained, and in the case of a radio wave of 200 MHz, a reflection loss of 25 dB or more (reflection 0.3% or less) was obtained. The thickness of the extruded cement material should be 13
Similar results were obtained when the distance was set to 0 mm.

[0035]

As described above in detail, according to the present invention, in a curtain wall wall structure in which a panel such as glass is supported by a frame material, the radio wave reflection loss in the wall panel is small, and most of the incident radio waves are indoors. Since it enters the radio wave, a radio wave reflection obstacle such as a ghost is prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a wall surface of a curtain wall according to the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a view taken along line IV-IV of FIG. 1;

5 is a view taken along the line VV of FIG.

FIG. 6 is a view corresponding to the arrow view in FIG. 1 VI-VI when the panel is supported by the sealing material.

FIG. 7 is a view corresponding to the arrow along line IV-IV in FIG. 1 according to the second embodiment of the present invention.

FIG. 8 is a view corresponding to a line VI-VI line in FIG. 1 according to a second embodiment of the present invention.

FIG. 9 is a view corresponding to a line IV-IV line in FIG. 1 according to a third embodiment of the present invention.

10 is a view corresponding to a line VI-VI line in FIG. 1 according to a third embodiment of the present invention.

FIG. 11 is a propagation state diagram of radio waves.

FIG. 12 is a structural perspective view of a VHF antenna.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wall panel, 2A-2C ... No eye, 3A-3C ... Vertical, 5 ... Horizontal steel beam, 6 ... Anchor metal fitting, 7.8 ... Radio wave absorption panel, 10 ... Bracket, 13 ... Zipper gasket, 14 ... Silicon Cover material

Claims (5)

[Claims] 1. A wall structure in which a radio wave transmissive panel is fitted in each opening formed by a holding frame made of a vertical material and a horizontal material, and at least all or most of the horizontal material is a radio wave transmissive material. A radio wave transmission type wall structure characterized in that 2. The radio wave transmission type wall structure according to claim 1, wherein a laminated material or cement molding material is used as the radio wave transmission material. 3. The radio wave transmission type wall structure according to claim 1, wherein the longitudinal member is made of a metal material. 4. The radio wave transmission type wall structure according to claim 1, wherein the surface of the holding frame made of the radio wave transmission material is coated with weather resistance. 5. A laminated member is used as the horizontal member, and a metal gasket support member that is substantially continuous in the member direction is provided on the outdoor side surface of the laminated member, and a radio wave attached to this metal gasket support member. 4. The radio wave transmission type wall structure according to claim 1, wherein the radio wave transmission panel is supported through a transmission gasket.