JPH05280117A - Wave absorber - Google Patents
Wave absorberInfo
- Publication number
- JPH05280117A JPH05280117A JP4092292A JP4092292A JPH05280117A JP H05280117 A JPH05280117 A JP H05280117A JP 4092292 A JP4092292 A JP 4092292A JP 4092292 A JP4092292 A JP 4092292A JP H05280117 A JPH05280117 A JP H05280117A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite plates
- wave absorber
- ferrite
- radio wave
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば建造物の外壁や
電波暗室内壁等に設けられ、複数のフェライ板の組み合
わせにより電波吸収壁を成す電波吸収体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave absorber which is provided on, for example, an outer wall of a building or an electromagnetic wave dark room wall, and which constitutes an electromagnetic wave absorbing wall by combining a plurality of ferrai plates.
【０００２】[0002]
【従来の技術】従来、この種の電波吸収体は、複数のフ
ェライト板を導電板に並べて固着して構成される。更
に、複数の電波吸収体が建物の外壁等に取り付けられ、
集合的に電波吸収壁を成す。このような電波吸収壁は、
汎用的に高層建築物による電波公害の対策として用いら
れる。2. Description of the Related Art Conventionally, this type of radio wave absorber is constructed by arranging and fixing a plurality of ferrite plates on a conductive plate. Furthermore, multiple electromagnetic wave absorbers are attached to the outer wall of the building,
Collectively forms an electromagnetic wave absorption wall. Such a radio wave absorption wall,
It is generally used as a countermeasure against radio wave pollution caused by high-rise buildings.
【０００３】又、電波暗室内に設けられる電波吸収壁に
は、シールド室の内壁に直接に複数のフェライト板を並
べて貼り付けたものや、更にこれらのフェライト板上に
ピラミッド形等のウレタン発泡体が固着されたものがあ
る。The electromagnetic wave absorbing wall provided in the anechoic chamber has a plurality of ferrite plates directly attached to the inner wall of the shield chamber, and a pyramid-shaped urethane foam on these ferrite plates. Some are stuck.
【０００４】この種のフェライト板は、寸法を縦１００
mm×横１００mm×厚さ６mm程度とするタイル状のもので
ある。電波吸収壁は、施工壁面に接着剤を広く塗布し、
手作業によりフェライト板を１枚ずつ順に並べて貼り付
け、固着させることで作成されるものである。This type of ferrite plate has a vertical dimension of 100.
It is a tile having a size of mm × width 100 mm × thickness 6 mm. For the electromagnetic wave absorption wall, a wide range of adhesive is applied to the construction wall surface,
It is made by manually laying out and sequentially adhering the ferrite plates one by one, and by fixing them.
【０００５】[0005]
【発明が解決しようとする課題】従来の電波吸収壁は、
多数のフェライト板を１枚ずつ手作業で貼り付けて作成
されるものである為、貼付作業に多くの工数を要して手
間がかかってしまう。それ故、貼付作業は能率の悪い多
大な時間を要するものになっている。The conventional electromagnetic wave absorbing wall is
Since a large number of ferrite plates are attached by hand one by one, the attaching work requires a lot of man-hours and is troublesome. Therefore, the pasting work is inefficient and requires a lot of time.
【０００６】又、フェライト板の貼付時に各フェライト
板間に大小の隙間が生じてフェライト板の配列に乱れを
起こすことが多く、こうした場合には外装壁や内装壁の
見映えが悪くなってしまう。加えて、フェライト板の向
きがばらついたり、段差を発生すると、ウレタン発泡体
を固着する作業時に場所毎に寸法や形状を変える必要が
あり、固着作業が煩雑になるという欠点がある。In addition, when the ferrite plates are attached, large and small gaps often occur between the ferrite plates to disturb the arrangement of the ferrite plates, and in such a case, the appearance of the exterior wall or the interior wall becomes poor. . In addition, if the orientation of the ferrite plate varies or a step is generated, it is necessary to change the size and shape for each place during the work of fixing the urethane foam, so that the work of fixing becomes complicated.
【０００７】本発明は、かかる事情を鑑みなされたもの
で、その技術的課題は、フェライト板単体の貼付作業を
不要とし、電波吸収壁を見映え良く簡易に構成し得る電
波吸収体を提供することにある。The present invention has been made in view of the above circumstances, and a technical problem thereof is to provide a radio wave absorber that does not require the work of sticking a ferrite plate alone, and that has a good appearance and can be simply constructed. Especially.
【０００８】[0008]
【課題を解決するための手段】本発明によれば、複数の
フェライト板を並べ、該複数のフェライト板のそれぞれ
の側縁間を結合材で結合して一体板とした電波吸収体が
得られる。According to the present invention, it is possible to obtain an electromagnetic wave absorber in which a plurality of ferrite plates are arranged and side edges of the plurality of ferrite plates are connected by a bonding material to form an integrated plate. ..
【０００９】又、本発明によれば、上記電波吸収体にお
いて、複数のフェライト板のそれぞれは、方形を成した
電波吸収体や、結合材は複数の空所を持つ格子状を成し
ており、複数のフェライト板は該複数の空所にそれぞれ
装着された電波吸収体が得られる。Further, according to the present invention, in the above-mentioned radio wave absorber, each of the plurality of ferrite plates has a square radio wave absorber, and the coupling material has a lattice shape having a plurality of voids. , A plurality of ferrite plates can be obtained as electromagnetic wave absorbers respectively mounted in the plurality of voids.
【００１０】更に、本発明によれば、上記電波吸収体に
おいて、側縁には溝が形成され、結合材は該溝に注入さ
れて固化した樹脂である電波吸収体が得られる。Further, according to the present invention, in the above-mentioned radio wave absorber, a groove is formed in the side edge, and the radio wave absorber is a resin which is a resin solidified by being injected into the groove.
【００１１】[0011]
【実施例】以下に実施例を挙げ、本発明の電波吸収体に
ついて図面を参照して詳細に説明する。図１に示す電波
吸収体は、例えば寸法が縦１００mm×横１００mm×厚さ
６mm程度の複数（合計２５枚）の正方形状のフェライト
板１を、それぞれ１〜５mm程度の僅かな隙間を保って縦
横に５枚ずつ格子状に並べ、これらのフェライト板の側
縁全周を結合材としての樹脂材２で互いに固着すること
により、一体成形板として（但し、図１ではフェライト
板１を１枚外して示す）構成されている。即ち、この電
波吸収体は、フェライト板１の複合体により成る一体成
形板のことである。The radio wave absorber of the present invention will be described in detail below with reference to the accompanying drawings. The electromagnetic wave absorber shown in FIG. 1 is, for example, a plurality of (25 in total) square ferrite plates 1 each having a size of 100 mm in length × 100 mm in width × 6 mm in thickness, each with a slight gap of about 1 to 5 mm. By arranging 5 sheets in a matrix in the vertical and horizontal directions and fixing the entire side edges of these ferrite plates to each other with a resin material 2 as a binding material, an integrally formed plate (however, in FIG. (Shown removed). That is, this radio wave absorber is an integrally molded plate made of a composite of the ferrite plate 1.
【００１２】このうち、樹脂材２は格子状の骨組形状を
成し、総てのフェライト板１の側縁を密着状態に取り巻
いて繋がっている。又、樹脂材２は、図示の如く、幅ｙ
の桟部３を有する一方、この幅ｙの半分の寸法幅ｇの框
部４を有している。各フェライト板１の側縁面は、焼成
したままの粗面になっているので、樹脂材２から脱落す
ることなく保持されている。ところで、側縁面を研削し
たフェライト板１を使用する場合には、例えば角部に切
り目５を形成し、この切り目５に粗面を形成しておくこ
とでフェライト板１の脱落を防止することができる。Of these, the resin material 2 has a lattice-like frame shape, and the side edges of all the ferrite plates 1 are closely wound and connected. The resin material 2 has a width y
While having the cross section 3 of the above, it also has the frame section 4 having a dimension width g which is half the width y. Since the side edge surface of each ferrite plate 1 is a rough surface as it is baked, it is held without falling off from the resin material 2. By the way, when the ferrite plate 1 whose side surface is ground is used, for example, a cut 5 is formed at a corner and a rough surface is formed on the cut 5 to prevent the ferrite plate 1 from falling off. You can
【００１３】このような電波吸収体は次のような工程を
経て製造される。先ず、フェライト板１の厚さと同じ深
さであって、所定個数のフェライト板１を収納できるよ
うな凹部が形成された成形下型を用意する。次に、この
成形下型の凹部に、各板間の側縁同士をほぼ間隙ｙに保
ち、且つ框部４を成すものの側縁をほぼ間隙ｇに保って
所定個数（図示例では縦横５枚ずつ）のフェライト板１
を並べて位置決めした後、更に成形下型の凹部の開放面
を覆うように成形上型を被せる。その後、通常の樹脂成
形手段により、各フェライト板間にポリエチレン等の熱
可塑性樹脂を注入して硬化させる。成形上り品にショッ
トブラスト処理を行い、バリとフェライト板表裏面に被
さった樹脂膜とを除去する。Such an electromagnetic wave absorber is manufactured through the following steps. First, a lower molding die having the same depth as the thickness of the ferrite plate 1 and having a recessed portion capable of accommodating a predetermined number of ferrite plates 1 is prepared. Next, in the concave portion of the lower mold for molding, a predetermined number (in the illustrated example, 5 sheets in the vertical and horizontal directions, the side edges between the plates are kept at a gap y and the side edges of the frame 4 are kept at a gap g). Each) Ferrite plate 1
After arranging and positioning, the upper molding die is further covered so as to cover the open surface of the concave portion of the lower molding die. After that, a thermoplastic resin such as polyethylene is injected between the ferrite plates and cured by an ordinary resin molding means. Shot blasting is performed on the molded product to remove burrs and the resin film covering the front and back surfaces of the ferrite plate.
【００１４】こうした電波吸収体は、框部４の寸法幅ｇ
が桟部３の幅ｙの半分になっているので、複数を組み合
わせることにより、框部４の側縁同士が当接されて幅ｙ
を有する一様な電波吸収壁を成すことができる。従っ
て、複数のフェライト板を配列よく、均一な間隙に並べ
られるようにしているので、電波吸収壁の見映えを極め
て優れたものにすることができる。Such a radio wave absorber has a dimension width g of the frame portion 4.
Is half the width y of the cross section 3, so that by combining a plurality of side sections, the side edges of the frame section 4 are brought into contact with each other so that the width y
It is possible to form a uniform electromagnetic wave absorption wall having. Therefore, since the plurality of ferrite plates are arranged well and arranged in a uniform gap, the appearance of the electromagnetic wave absorbing wall can be made extremely excellent.
【００１５】図２は、別の実施例である電波吸収体の外
観を斜視図により示したもので、ここでは、側縁面を研
削した正方形のフェライト板６の複数個（図で４個）を
互いに密接して並べ、樹脂材７でこれらのフェライト板
６の側縁全周間を固着して正方形の電波吸収体を形成し
たものである。この為、各フェライト板６の側縁全周に
は、その一枚を拡大して図示した如く、表裏面と平行に
延びた溝８が形成されている。FIG. 2 is a perspective view showing the outer appearance of a radio wave absorber according to another embodiment. Here, a plurality of square ferrite plates 6 whose side edge surfaces are ground (four in the figure) are shown. Are arranged closely to each other, and the side edges of the ferrite plate 6 are fixed to each other with a resin material 7 to form a square wave absorber. Therefore, a groove 8 extending in parallel with the front and back surfaces is formed on the entire circumference of the side edge of each ferrite plate 6, as shown in an enlarged view of one of the ferrite plates 6.
【００１６】図３は、図２のＡ−Ａ線縦断正面図を示し
たもので、樹脂材７が図１に示した樹脂材２と相似的に
溝８を埋めて繋がったものであることを説明している。
即ち、図２の電波吸収体は、並べたフェライト板６を平
らな成形上下型で挟み、成形上下型間に側方から可撓材
を圧入して溝８の開放面を覆った後、その溝８に溶解樹
脂を射出する等して作成されるものである。FIG. 3 is a vertical sectional front view taken along the line AA of FIG. 2, in which the resin material 7 is similar to the resin material 2 shown in FIG. Is explained.
That is, in the radio wave absorber shown in FIG. 2, the ferrite plates 6 arranged are sandwiched by flat molding upper and lower dies, and a flexible material is press-fitted between the molding upper and lower dies to cover the open surface of the groove 8. It is created by injecting a melted resin into the groove 8.
【００１７】この電波吸収体においては、フェライト板
６が隣接するもの同士で密接している為、溝８で硬化し
た樹脂がフェライト板６間に露出することはない。従っ
て、溝８の深さについては特別な考慮を必要としない。In this radio wave absorber, since the ferrite plates 6 are in close contact with each other, the resin cured in the groove 8 is not exposed between the ferrite plates 6. Therefore, no special consideration is required regarding the depth of the groove 8.
【００１８】尚、電波吸収体のフェライト板１，６の個
数は各実施例で図示した数に限定されるものではない。
即ち、電波吸収体を構成するフェライト板１，６の数
は、人手で取扱い得る重量であれば必要に応じて任意に
増減させることができる。又、フェライト板１，６の単
体の形状も基本的には正方形又は方形であるが、これら
に限定されるものではない。更に、上述した実施例で
は、フェライト板１，６の側縁全周を結合する場合につ
いて説明したが、フェライト板１，６の側縁の一部のみ
を結合させた場合でも同様な効果を奏する。The number of ferrite plates 1 and 6 of the radio wave absorber is not limited to the number shown in each embodiment.
That is, the number of the ferrite plates 1 and 6 forming the radio wave absorber can be arbitrarily increased or decreased as needed as long as the weight is manually handleable. Further, the single shape of the ferrite plates 1 and 6 is basically a square or a square, but is not limited to these. Further, in the above-described embodiment, the case where the entire side edges of the ferrite plates 1 and 6 are joined has been described, but the same effect can be obtained even when only a part of the side edges of the ferrite plates 1 and 6 are joined. .
【００１９】[0019]
【発明の効果】以上のように、本発明の電波吸収体によ
れば、所定数のフェライト板の側縁間を結合材により結
合して一体化しているので、電波吸収壁の作成を少ない
工数で簡易に行い得るようになる。しかも、電波吸収体
を成す所定数のフェライト板は、段差を極小にして平面
状に並べ得るので、各フェライト板上にウレタン発泡体
を固着する場合にも固着作業を容易に行うことができ
る。更に、所定数のフェライト板は、結合材により側縁
を固着されているので、フェライト板単体の剥落がな
く、耐衝撃性に優れた電波吸収壁を作成できるという長
所がある。従って、本発明の電波吸収体を用いれば、電
波暗室用の電波吸収壁であっても廉価に提供することが
できる。As described above, according to the electromagnetic wave absorber of the present invention, the side edges of a predetermined number of ferrite plates are connected by the bonding material to be integrated, so that the electromagnetic wave absorbing wall can be manufactured with less man-hours. You can do it easily. Moreover, since the predetermined number of ferrite plates forming the radio wave absorber can be arranged in a plane with the minimum step difference, the fixing work can be easily performed even when the urethane foam is fixed on each ferrite plate. Further, since the side edges of the predetermined number of ferrite plates are fixed by the bonding material, there is an advantage that the radio wave absorbing wall having excellent impact resistance can be created without the ferrite plate itself being peeled off. Therefore, if the radio wave absorber of the present invention is used, even a radio wave absorption wall for an anechoic chamber can be provided at low cost.
【図１】本発明の一実施例に係る電波吸収体の外観を一
部を分解して斜視図により示したものである。FIG. 1 is a partially exploded perspective view showing an appearance of a radio wave absorber according to an embodiment of the present invention.
【図２】本発明の他の実施例に係る電波吸収体及びその
一部の外観を斜視図により示したものである。FIG. 2 is a perspective view showing the appearance of a radio wave absorber and a part thereof according to another embodiment of the present invention.
【図３】図２のＡ−Ａ線における電波吸収体の縦断正面
図である。3 is a vertical sectional front view of the radio wave absorber taken along the line AA in FIG.
１，６ 正方形フェライト板 ２，７ 樹脂材 ３ 桟部 ４ 框部 ５ 切り目 ８ 溝 1,6 Square ferrite plate 2,7 Resin material 3 Cross section 4 Frame section 5 Cut 8 Groove
Claims (4)
ェライト板のそれぞれの側縁間を結合材で結合して一体
板としたことを特徴とする電波吸収体。1. A radio wave absorber comprising a plurality of ferrite plates arranged side by side, and the side edges of the plurality of ferrite plates are connected by a bonding material to form an integrated plate.
方形を成していることを特徴とする請求項１記載の電波
吸収体。2. Each of the plurality of ferrite plates comprises:
The electromagnetic wave absorber according to claim 1, wherein the electromagnetic wave absorber has a rectangular shape.
成しており、前記複数のフェライト板は該複数の空所に
それぞれ装着されている請求項１記載の電波吸収体。3. The radio wave absorber according to claim 1, wherein the binder has a lattice shape having a plurality of cavities, and the plurality of ferrite plates are attached to the plurality of cavities, respectively.
は該溝に注入されて固化した樹脂であることを特徴とす
る請求項１記載の電波吸収体。4. The radio wave absorber according to claim 1, wherein a groove is formed on the side edge, and the binder is a resin which is injected into the groove and solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4092292A JPH05280117A (en) | 1992-02-27 | 1992-02-27 | Wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4092292A JPH05280117A (en) | 1992-02-27 | 1992-02-27 | Wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05280117A true JPH05280117A (en) | 1993-10-26 |
Family
ID=12593994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4092292A Pending JPH05280117A (en) | 1992-02-27 | 1992-02-27 | Wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05280117A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003045731A (en) * | 2001-07-30 | 2003-02-14 | Nec Tokin Corp | Non-contact power transmission apparatus |
| WO2006129704A1 (en) * | 2005-06-03 | 2006-12-07 | Murata Manufacturing Co., Ltd. | Ferrite sheet and process for producing the same |
| JP2007184494A (en) * | 2006-01-10 | 2007-07-19 | Tdk Corp | Ferrite part |
| JP2011244015A (en) * | 2011-08-25 | 2011-12-01 | Panasonic Corp | Magnetic sheet |
| JP2011249850A (en) * | 2011-09-01 | 2011-12-08 | Panasonic Corp | Magnetic sheet |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
| CN103013440A (en) * | 2012-12-17 | 2013-04-03 | 清华大学 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
| JP2015076427A (en) * | 2013-10-07 | 2015-04-20 | 小島プレス工業株式会社 | Core used in power reception side coil unit of vehicle non-contact charging system and manufacturing method of the same |
-
1992
- 1992-02-27 JP JP4092292A patent/JPH05280117A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003045731A (en) * | 2001-07-30 | 2003-02-14 | Nec Tokin Corp | Non-contact power transmission apparatus |
| WO2006129704A1 (en) * | 2005-06-03 | 2006-12-07 | Murata Manufacturing Co., Ltd. | Ferrite sheet and process for producing the same |
| JP2007184494A (en) * | 2006-01-10 | 2007-07-19 | Tdk Corp | Ferrite part |
| JP4529906B2 (en) * | 2006-01-10 | 2010-08-25 | Ｔｄｋ株式会社 | Ferrite parts |
| JP2011244015A (en) * | 2011-08-25 | 2011-12-01 | Panasonic Corp | Magnetic sheet |
| JP2011249850A (en) * | 2011-09-01 | 2011-12-08 | Panasonic Corp | Magnetic sheet |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
| CN103013440A (en) * | 2012-12-17 | 2013-04-03 | 清华大学 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
| JP2015076427A (en) * | 2013-10-07 | 2015-04-20 | 小島プレス工業株式会社 | Core used in power reception side coil unit of vehicle non-contact charging system and manufacturing method of the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20000927 |