JP3573700B2

JP3573700B2 - Electromagnetic wave shield structure

Info

Publication number: JP3573700B2
Application number: JP2000260778A
Authority: JP
Inventors: 好明高橋; 孝志小岩
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2000-08-30
Filing date: 2000-08-30
Publication date: 2004-10-06
Anticipated expiration: 2020-08-30
Also published as: JP2002070440A

Description

【０００１】
【発明の属する技術分野】
本発明は、電磁波シールド扉枠体の導電部と電磁波シールド扉本体の電磁波シールド層とを電気的に導電接続させる電磁波シールド扉本体の下端面部の電磁波シールド構造に関し、より詳しくは、電磁波シールド扉本体を閉めたときに、その下端面部を、電磁波シールド扉枠体の導電部と電気的に導電接続させて、下端面部付近における不要な電磁波の侵入や漏洩を防止するように構成してある電磁波シールド構造に関する。
【０００２】
【従来の技術】
従来、この種の電磁波シールド構造としては、電磁波シールド扉本体の下端面部に、導電性と弾性を有する導電接触部材（例えば、ベリリュームフィンガーやガスケット等）を、その下端面に対して略直交する方向からの取付け操作（例えば、かかる方向からのビス止めによる螺合固定等）により、取り付けて、電磁波シールド扉本体の開閉に伴って、その下端面に取り付けた導電接触部材が、電磁波シールド扉枠体の導電部と摺接し導電接続するように構成されている。
ところが、かかる導電接触部材は、電磁波シールド扉本体の開閉操作を繰り返すにつれて摩耗等により破損したり、埃が付着したりして、導電部との電気的な導電接続の効率が低下するため、定期的に交換する必要があり、上述のように、従来の電磁波シールド構造は、電磁波シールド扉本体の下端面に対してビス等を介して略直交する方向からの取付け操作により、導電接触部材を電磁波シールド扉本体の下端面部に装着するように構成されているがゆえに、次のような欠点がある。
【０００３】
【発明が解決しようとする課題】
つまり、かかる電磁波シールド構造の場合、導電接触部材を適宜交換して、精度の高い電磁波シールドを維持することができるようにメンテナンスするにあたっては、電磁波シールド扉本体の下端面に略直交する方向からの交換操作が必要となるが、電磁波シールド扉本体自体が電磁波シールド扉枠体に取り付けてある状態では、その電磁波シールド扉本体の下端面に略直交する方向の空間、すなわちその下端面の下方空間には、かかる交換操作を行えるような作業空間がほとんど存在しない。よって、交換作業を行い難く、わざわざ電磁波シールド扉本体自体を取り外さなければ、メンテナンスすることができないという欠点がある。
【０００４】
本発明は、上記欠点を解消し、簡便なメンテナンスで電磁波シールドを確実にすることができる電磁波シールド扉本体の下端面部の電磁波シールド構造を提供するところにある。
【０００５】
【課題を解決するための手段】
請求項１記載の発明の特徴構成は図１〜５に例示するごとく、電磁波シールド扉枠体２の導電部９と電磁波シールド扉本体１の電磁波シールド層５とを導電接触させる前記電磁波シールド扉本体１の下端面部１０の電磁波シールド構造であって、前記下端面部１０に、前記電磁波シールド扉本体１の横端面１１に嵌入口１２を有するあり溝１３を備えた長尺の金属部材１７を、前記電磁波シールド扉本体１の下端辺に沿って固定接続し、前記あり溝１３に嵌入自在な拡大頭部１４を上側部に有する長尺部材１５を、前記あり溝１３に前記嵌入口１２から挿脱自在に装着すると共に、前記長尺部材１５の下側部には、前記電磁波シールド扉本体１の開閉に伴って、前記導電部９と摺接する導電接触部材１６を設け、前記あり溝１３に前記長尺部材１５を装着したときに、前記あり溝１３と前記拡大頭部１４との間に、前記長尺部材１５を前記導電部９に近接する方向に付勢する付勢部材２０を介装し、前記導電接触部材１６が前記導電部９と摺接した状態で、その導電部９と前記電磁波シールド層５が、前記金属部材１７、前記長尺部材１５、前記導電接触部材１６を介して電気的に導電接続するところにある。
【０００６】
請求項１の発明の特徴構成によれば、電磁波シールド扉本体の下端面部に、電磁波シールド扉本体の下端辺に沿って形成されたあり溝へ、電磁波シールド扉枠体の導電部と接触させる導電接触部材がその下側部に備えられた長尺部材を、電磁波シールド扉本体の横端面に設けられた嵌入口から、あり溝の長手方向に沿って、挿入し装着することにより、電磁波シールド扉本体の開閉に伴って、下端面部と導電部とを電気的に導電接続して、下端面部付近を電磁波シールドすることができる。
【０００７】
よって、導電部と摺接させる導電接触部材に交換の必要が生じたときには、その導電接触部材を備えた長尺部材を、あり溝から抜き出し操作し、取り出せばよく、そのあり溝への嵌入口は電磁波シールド扉本体の横端面に設けてあるので、かかる抜き出し操作は、電磁波シールド扉本体の横端面方向から行うこととなる。そして、電磁波シールド扉本体の一方の横端面方向には、電磁波シールド扉本体を閉じた状態から、開けた状態にするにしたがって、開放空間が形成され、十分な作業空間が生まれる。従って、わざわざ電磁波シールド扉本体を電磁波シールド扉枠体から取り外すこともなく、電磁波シールド扉本体が開いた状態にするだけで、長尺部材をあり溝から抜き出して取り出せるから、簡便に、導電接触部材を交換するメンテナンス作業を行い、電磁波シールドの確実性を維持することができるようになる。
【０００８】
また、導電部と摺接により電気的に導電接続させる導電接触部材は、単に導電性を有するだけでなく、形状を弾性変形できる特殊な形状特性も備えたものでなければならず、単なる導電性材料（金属やプラスチック等）に比べコストは割高になるが、上述のように、長尺部材の下側部に導電接触部材を設けるから、長尺部材は単なる導電性材料とし、特殊な形状特性が必要とされる導電接触部材を必要最小限にし、コストを低減させることもできる。また、長尺部材は単に導電性を有していればよいから、あり溝から円滑に挿脱操作しやすいものとすることもでき、さらにメンテナンス作業を簡便に行うことができるようにすることもできる。
【００１０】
さらに、上記の作用効果を叶えることができるのに加えて、あり溝に長尺部材を装着したときに、あり溝と拡大頭部との間に、長尺部材を導電部に近接する方向に付勢する付勢部材（例えば板バネ等の弾性材）を介装してあるので、あり溝と長尺部材と導電部との電気的な導電接続がより確実なものとなる。
【００１１】
つまり、長尺部材を導電部に近接させる作用力が働くから、長尺部材の上側部に備えられた拡大頭部は、かかる作用力により下方に押圧され、あり溝への嵌入部分において、よりあり溝に密接しようとし、そして、長尺部材の下側部に備えられた導電接触部材は、同じく、かかる作用力により下方に押圧され、その下方にある導電部により密接して接触するようになる。よって、あり溝と長尺部材と導電部との電気的な導電接続がより確実なものとなり、電磁波シールド扉本体の下端面部と電磁波シールド扉枠体の導電部との電気的な導電接続を確実にするとともに、あり溝と長尺部材と導電部との間の夫々の接続箇所において隙間が生じ難くなり、その下端面部付近における電磁波シールド特性を、より向上させることができる。
【００１２】
尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。
【００１３】
【発明の実施の形態】
以下に本発明の実施の形態を図面を参照しながら説明する。一例として、電磁波シールド室の出入口に取り付けられた、本発明に係る電磁波シールド構造を備える電磁波シールド扉の斜視図を図１に、その電磁波シールド扉の縦断面図を図２に示し、そして、電磁波シールド扉の下端付近の縦断面図を図３に、その斜視図を図４に示す。
【００１４】
図１に示すように、電磁波シールド扉本体１は、電磁波シールド室の出入口壁面に連設された電磁波シールド扉枠体２に、その電磁波シールド扉本体１を縦軸周りに揺動操作して開閉自在となるよう、取り付けてある。
【００１５】
前記電磁波シールド扉本体１は、図２に示すように、ロックボード等からなる芯材３の表面に、木製の表面化粧部材４Ａ，４Ｂを取り付けて構成してあり、電磁波シールド室外に面する面側の表面化粧部材４Ａの背面には、電磁波シールド層５として、上下端がおり曲がったコの字状の縦断面形状をした金属製鋼板（例えば亜鉛板、アルミ板等、導電性材料の一例）を取り付け、電磁波シールド扉本体１に入射してくる不要な電磁波の侵入や漏洩を防止することができるように構成してある。
【００１６】
そして、電磁波シールド扉本体１の上端面部や下端面部は、略横Ｌ字状の縦断面形状に切り欠き、夫々において、次のように電磁波シールド層５の上下端と電気的に導電接続する電磁波シールド構造を設け、電磁波シールド扉本体１の上端面部や下端面部と、電磁波シールド扉枠体２との隙間からの不要な電磁波の侵入や漏洩を防止できるように構成してある。
【００１７】
電磁波シールド扉本体１の上端面部には、アルミ製（導電性材料の一例）の電磁波シールド材６を電磁波シールド層５の上端にビス止めにより取り付けてある。そして、電磁波シールド扉枠体２における、電磁波シールド材６との戸当たり箇所には、ブラシ（モヘヤ）形状の接触部材（導電性を有する材料の一例）７を、その電磁波シールド扉枠体２内に設けられた金属製鋼板等の導電性材料からなる電磁波シールド層８に設けてある。よって、電磁波シールド扉本体１の開閉に伴って、その電磁波シールド材６の先端が、接触部材７を介して電磁波シールド層８と電気的に導電接続するように構成してある。
これにより、電磁波シールド扉本体１を閉じた状態では、電磁波シールド層５，８が電磁波シールド材６と接触部材７とを介して電気的に導電接続するので、電磁波シールド扉本体１の上端面部付近からの不要な電磁波の侵入や漏洩を防止する電磁波シールドを行うことができる。
【００１８】
次に、図３，４を参照しながら、電磁波シールド扉本体１の下端面部１０付近からの電磁波の侵入や漏洩を防止する本発明に係る電磁波シールド構造について詳述する。
【００１９】
図３，４に示すように、前記電磁波シールド扉枠体２の敷居部（導電部の一例）９と電気的に導電接触させる電磁波シールド扉本体１の下端面部１０の電磁波シールド構造は、下端面部１０に、電磁波シールド扉本体１の横端面１１に嵌入口１２を有するあり溝１３を、電磁波シールド扉本体１の下端辺に沿って形成し、あり溝１３に嵌入自在な拡大頭部１４を上側部に有する長尺部材１５を、あり溝１３に嵌入口１２から挿脱自在に装着すると共に、長尺部材１５の下側部には、電磁波シールド扉本体１の開閉に伴って、敷居部９と摺接する導電接触部材１６を設けて構成してある。
【００２０】
前記敷居部９は、亜鉛板からなる中空体に発泡ウレタンを充填して形成してあり、この亜鉛板は、電磁波シールド室内の床Ｆに設けてある電磁波シールド層（図示せず）と電気的に導電接続するように構成してある。
【００２１】
そして、前記あり溝１３は、長尺のアルミ製金属部材１７の一方の表面に下向き略凸状の縦断面形状の溝１３を長手方向に設けて形成し、その金属部材１７の他方の表面、すなわちあり溝１３がない方の底面側を、電磁波シールド扉本体１の下端面部１０、すなわち電磁波シールド層５の下端に、ビス止めにより固定接続して、あり溝１３が、電磁波シールド扉本体１の横端面１１に嵌入口１２を有し、電磁波シールド扉本体１の下端辺に沿うように構成してある。
【００２２】
前記長尺部材１５は、その上側部に、あり溝１３に嵌入自在な拡大頭部１４を備えるとともに、下側部には、電磁波シールド扉本体１の開閉に伴って、敷居部９と摺接するように導電接触部材１６を設けてある。導電接触部材１６は、長尺部材１５の下端面を敷居部９の上端面に沿った形状にするとともに、その下端面に長手方向に沿って凹部１８を形成し、その凹部１８に、ブラシ（モヘア）状の導電性を有する材料を、埋め込んで構成してある。
【００２３】
よって、電磁波シールド層５の下端と、金属部材１７と、長尺部材１５と、導電接触部材１６と、敷居部９とを電気的に導電接続することができ、電磁波シールド扉本体１の下端面部付近からの不要な電磁波の侵入や漏洩を防止する電磁波シールドを行うことができる。
また、図４に示すように、長尺部材１５は、電磁波シールド扉本体１の横端面１１の嵌入口１２から、挿脱自在（抜差自在）なので、簡便に導電接触部材１６や長尺部材１５の交換を行い、それら導電性部材のメンテナンスを行うことができる。
【００２４】
なお、図３，４に示すように、拡大頭部１４の上端面形状を、長手方向に沿って凹部１９を有する形状とし、あり溝１３に長尺部材１５を装着したときに、あり溝１３と拡大頭部１４との間、すなわち凹部１９に、長尺部材１５を敷居部９に近接する方向に付勢する板バネ材（付勢部材の一例）２０を介装するようにしてあれば、各導電性部材間の接続がより確実になり、より電気的な導電接続の効率を高めて、電磁波シールドをより確実なものにすることができる。
【００２５】
以上のように、本発明に係る電磁波シールド構造によれば、電磁波シールド扉の、上端付近から、本体表面、そして下端付近に至るまで、電気的に導電接続する各種導電性部材により電磁波シールドを形成し、不要な電磁波の侵入や漏洩を防止することができるとともに、各種導電性部材のメンテナンスを簡便に行い、その電磁波シールドの確実性を維持することができる。
【００２６】
〔別実施形態〕
以下に他の実施形態を説明する。
〈１〉本発明においてあり溝１３の形状は、先の実施形態で示した下向き略凸状の縦断面形状のものに限らず、例えば、図５に示すような形状のものでもよい。図５では、あり溝１３は、長尺のアルミ製金属部材２２の一方の表面から略十字状の縦断面形状で奥拡がりな部分を備える溝を長手方向に設けて形成してあり、長尺部材１５が、その上側部に備える拡大頭部１４でその溝の奥拡がりな部分に嵌入自在となるように構成してある。そして、あり溝１３と拡大頭部１４上端面との間に形成される隙間空間に、付勢部材２０を介装し、長尺部材１５を下方、すなわち導電部９に近接する方向に付勢することもできる。
【００２７】
尚、本発明においてあり溝１３とは、▲１▼電磁波シール扉本体１の下端辺に沿って形成される溝であり、長尺部材１５を電磁波シールド扉本体１の横端面１１方向から挿脱操作を行えるとともに、▲２▼その溝が奥拡がりな部分を備えており、長尺部材１５を装着したときに、長尺部材１５が、その上側部に備える拡大頭部１４でその溝の奥拡がりな部分に係止して、あり溝１３から下方に抜け落ちないように構成してあればよく、本実施形態で例示したものに限らず、その他の如何なる形状のものでもよい。
【００２８】
また、先の実施形態では、金属部材１７，２２を、電磁波シールド扉本体１に取り付けて、その下端面部にあり溝１３が形成される例を示したが、電磁波シールド扉本体１自体にあり溝１３を一体形成してあっても勿論よい。
【００２９】
〈２〉本発明に係る電磁波シールド構造は、先の実施形態で説明した電磁波シールド室に限るものではなく、電磁波の遮蔽を行う必要があるその他の出入口等に設けても勿論よい。
【００３０】
〈３〉電磁波シールド扉本体は、先の実施形態で説明した芯材３の表面に木製の表面化粧部材４Ａ，４Ｂを設け、芯材と表面化粧部材４Ａとの間に電磁波シールド層５を備えるものに限るものではなく、例えば、複数の木製板部材間に電磁波シールド層が設けられたものや、金属製鋼板の枠体からなるものでもよく、その他の公知のものでもよい。また、電磁波シールド扉本体１を縦軸周りに揺動操作して開閉自在となる形式の電磁波シールド扉に限らず、電磁波シールド扉本体１の横端面方向に、その開閉に伴って開放空間が形成されればよく、引き戸形式、観音扉形式、回転扉形式等のものでもよい。
【００３１】
〈４〉導電接触部材１６は、ブラシ（モヘア）状の形状のものに限らず、電磁波シールド扉本体１の開閉に伴って、導電部９と摺接して、電気的に導電接続するものであればよく、例えば、導電性ガスケットやベリリュームフィンガー等でもよく、また、長尺部材１５，２２と同じ導電性材料により一体形成してあっても勿論よい。
【００３２】
〈５〉また、付勢部材２０は、先の実施形態で示したような板バネ材に限らず、例えば、ベリリュームフィンガー等、付勢作用を有し、あり溝１３と拡大頭部１４との間に装着容易な弾性材であればよい。
【図面の簡単な説明】
【図１】本発明に係る電磁波シールド構造を備える電磁波シールド扉の斜視図
【図２】本発明に係る電磁波シールド構造を備える電磁波シールド扉の縦断面図
【図３】図２に示した電磁波シールド扉の要部の縦断面図
【図４】図２に示した電磁波シールド扉の要部の斜視図
【図５】別実施形態を示す要部の縦断面図
【符号の説明】
１電磁波シールド扉本体
２電磁波シールド扉枠体
５電磁波シールド層
９導電部
１０電磁波シールド扉本体の下面部
１１電磁波シールド扉本体の横端面
１２嵌入口
１３あり溝
１４拡大頭部
１５長尺部材
１６導電接触部材
１７長尺の金属部材
２０付勢部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic wave shielding structure at a lower end portion of an electromagnetic wave shielding door body for electrically conductively connecting a conductive portion of an electromagnetic wave shielding door frame and an electromagnetic wave shielding layer of an electromagnetic wave shielding door body, and more particularly, to an electromagnetic wave shielding door body When closed, the lower end surface is electrically conductively connected to the conductive portion of the electromagnetic wave shielding door frame to prevent unnecessary electromagnetic waves from entering and leaking near the lower end surface. Regarding the structure.
[0002]
[Prior art]
Conventionally, as this type of electromagnetic wave shielding structure, a conductive contact member having conductivity and elasticity (for example, beryllium finger or gasket) is provided on the lower end surface of the electromagnetic wave shield door body in a direction substantially orthogonal to the lower end surface. When the electromagnetic wave shielding door body is opened and closed, the conductive contact member attached to the lower end surface of the electromagnetic wave shielding door frame is attached to the electromagnetic wave shielding door frame by an attaching operation (for example, screwing fixation by screwing from such a direction). Is configured so as to be in sliding contact with the conductive portion.
However, such conductive contact members are damaged due to abrasion or the like as dust is attached or dust adheres as the opening / closing operation of the electromagnetic wave shielding door body is repeated, so that the efficiency of electrical conductive connection with the conductive part is reduced. As described above, in the conventional electromagnetic wave shielding structure, the conductive contact member is electromagnetically shielded by a mounting operation from a direction substantially perpendicular to the lower end surface of the electromagnetic wave shielding door body via a screw or the like. Since it is configured to be mounted on the lower end surface of the shield door body, there are the following disadvantages.
[0003]
[Problems to be solved by the invention]
In other words, in the case of such an electromagnetic wave shield structure, when performing maintenance so that the highly accurate electromagnetic wave shield can be maintained by appropriately replacing the conductive contact member, the conductive contact member should be viewed from a direction substantially perpendicular to the lower end surface of the electromagnetic wave shield door body. Although the replacement operation is required, in a state where the electromagnetic wave shielding door body itself is attached to the electromagnetic wave shielding door frame, a space in a direction substantially orthogonal to a lower end surface of the electromagnetic wave shielding door body, that is, a space below the lower end surface. Has almost no work space in which such an exchange operation can be performed. Therefore, there is a disadvantage that the replacement work is difficult to perform, and maintenance cannot be performed unless the electromagnetic wave shield door body itself is removed.
[0004]
An object of the present invention is to provide an electromagnetic wave shielding structure at the lower end surface of an electromagnetic wave shielding door body capable of solving the above-mentioned disadvantages and ensuring the electromagnetic wave shielding with simple maintenance.
[0005]
[Means for Solving the Problems]
Characterizing feature of the first aspect of the present invention as illustrated in Figures 1-5, the electromagnetic wave shielding door body and the electromagnetic wave shielding layer 5 of the electromagnetic wave shielding door frame 2 of the conductive portion 9 and the electromagnetic wave shielding door body 1 into contact conductive 1. The electromagnetic wave shielding structure of the lower end face portion 10 of claim 1, wherein the lower end face portion 10 includes a long metal member 17 having a dovetail groove 13 having a fitting inlet 12 on a lateral end face 11 of the electromagnetic wave shield door body 1, A long member 15 fixedly connected along the lower end side of the electromagnetic wave shield door main body 1 and having an enlarged head 14 at an upper portion which can be fitted into the dovetail groove 13 is inserted into and removed from the dovetail groove 13 through the fitting entrance 12. as well as in which, in the lower portion of the elongated member 15, with the opening and closing of the electromagnetic wave shielding door body 1, the conductive portion 9 and the sliding contact conductive contact member 16 is provided, the said dovetail groove 13 Long section When the mounting member 15 is attached, an urging member 20 for urging the long member 15 in a direction approaching the conductive portion 9 is interposed between the dovetail groove 13 and the enlarged head 14, When the conductive contact member 16 is in sliding contact with the conductive portion 9, the conductive portion 9 and the electromagnetic wave shielding layer 5 are electrically connected via the metal member 17, the long member 15, and the conductive contact member 16. It is where the conductive connection is made.
[0006]
According to the characteristic configuration of the first aspect of the present invention, the conductive member is brought into contact with the conductive portion of the electromagnetic wave shielding door frame into the dovetail formed along the lower end side of the electromagnetic wave shielding door body on the lower end surface of the electromagnetic wave shielding door body. By inserting and installing a long member provided with a contact member on its lower side from a fitting entrance provided on the lateral end surface of the electromagnetic wave shield door main body along the longitudinal direction of the dovetail groove, the electromagnetic wave shield door With the opening and closing of the main body, the lower end surface and the conductive portion can be electrically conductively connected to each other to shield an electromagnetic wave near the lower end surface.
[0007]
Therefore, when it is necessary to replace the conductive contact member to be brought into sliding contact with the conductive portion, the long member provided with the conductive contact member may be extracted from the dovetail groove and taken out. Is provided on the lateral end face of the electromagnetic wave shield door main body, so the extraction operation is performed from the side of the lateral end face of the electromagnetic wave shield door main body. An open space is formed in the direction of the one side end face of the electromagnetic wave shield door main body as the electromagnetic wave shield door main body is changed from a closed state to an open state, and a sufficient working space is created. Therefore, it is not necessary to remove the electromagnetic wave shielding door main body from the electromagnetic wave shielding door frame, and only by keeping the electromagnetic wave shielding door main body open, the long member can be pulled out from the groove and taken out. The maintenance work for replacing the electromagnetic wave can be performed, and the reliability of the electromagnetic wave shield can be maintained.
[0008]
In addition, a conductive contact member that is electrically conductively connected to a conductive portion by sliding contact must have not only conductivity but also special shape characteristics capable of elastically deforming the shape. Although the cost is higher than the material (metal, plastic, etc.), as described above, since the conductive contact member is provided on the lower side of the long member, the long member is simply a conductive material and has special shape characteristics. It is also possible to minimize the number of conductive contact members required and reduce costs. In addition, since the long member only needs to have conductivity, it can be easily inserted and removed from the dovetail groove, and the maintenance work can be performed easily. it can.
[0010]
Furthermore, in addition to being able to achieve the above-described effects, when the elongated member is attached to the dovetail groove, the elongated member is moved between the dovetail groove and the enlarged head in a direction approaching the conductive portion. Since the urging member (for example, an elastic material such as a leaf spring) is interposed, the electric conductive connection between the dovetail groove, the long member, and the conductive part is more reliable.
[0011]
In other words, since the action force for bringing the long member close to the conductive part acts, the enlarged head provided on the upper part of the long member is pressed downward by the action force, and the portion inserted into the dovetail groove is more pressed. The conductive contact member provided on the lower side of the elongated member is also pressed downward by the acting force, so that the conductive contact member provided on the lower side of the elongated member is brought into close contact with the conductive portion below. Become. Therefore, the electrically conductive connection between the dovetail groove, the long member and the conductive portion becomes more reliable, and the electrical conductive connection between the lower end surface portion of the electromagnetic wave shield door body and the conductive portion of the electromagnetic wave shield door frame is ensured. In addition, gaps are less likely to be formed at the respective connection points between the dovetail groove, the long member, and the conductive portion, and the electromagnetic wave shielding characteristics near the lower end surface can be further improved.
[0012]
Note that, as described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As an example, FIG. 1 shows a perspective view of an electromagnetic wave shielding door provided with an electromagnetic wave shielding structure according to the present invention, which is attached to an entrance of an electromagnetic wave shielding room, and FIG. 2 shows a longitudinal sectional view of the electromagnetic wave shielding door. FIG. 3 is a longitudinal sectional view showing the vicinity of the lower end of the shield door, and FIG. 4 is a perspective view thereof.
[0014]
As shown in FIG. 1, the electromagnetic wave shielding door main body 1 is opened and closed by swinging the electromagnetic wave shielding door main body 1 around a vertical axis on an electromagnetic wave shielding door frame 2 connected to an entrance wall of the electromagnetic wave shielding room. It is attached so that it can be freely.
[0015]
As shown in FIG. 2, the electromagnetic wave shield door main body 1 is configured by attaching wooden surface decorative members 4A and 4B to the surface of a core material 3 made of a lock board or the like, and the surface facing the outside of the electromagnetic wave shield room. On the back surface of the side surface decorative member 4A, as an electromagnetic wave shielding layer 5, an example of conductive material such as a zinc plate, an aluminum plate, etc. ) Is attached so that unnecessary electromagnetic waves entering the electromagnetic wave shielding door main body 1 can be prevented from entering or leaking.
[0016]
The upper end face and the lower end face of the electromagnetic wave shield door body 1 are cut out in a substantially horizontal L-shaped vertical cross-sectional shape, and each of the electromagnetic waves is electrically conductively connected to the upper and lower ends of the electromagnetic wave shield layer 5 as follows. A shield structure is provided so that unnecessary electromagnetic waves can be prevented from entering or leaking from a gap between the upper end surface or lower end surface of the electromagnetic wave shield door main body 1 and the electromagnetic wave shield door frame 2.
[0017]
An electromagnetic wave shielding material 6 made of aluminum (an example of a conductive material) is attached to the upper end surface of the electromagnetic wave shielding door body 1 at the upper end of the electromagnetic wave shielding layer 5 by screwing. A brush (mohair) -shaped contact member (an example of a conductive material) 7 is provided at the door stop portion of the electromagnetic wave shield door frame 2 with the electromagnetic wave shield material 6 inside the electromagnetic wave shield door frame 2. Provided on the electromagnetic wave shielding layer 8 made of a conductive material such as a metal steel plate. Therefore, with the opening and closing of the electromagnetic wave shield door body 1, the tip of the electromagnetic wave shield material 6 is configured to be electrically conductively connected to the electromagnetic wave shield layer 8 via the contact member 7.
Thereby, when the electromagnetic wave shield door main body 1 is closed, the electromagnetic wave shield layers 5 and 8 are electrically conductively connected via the electromagnetic wave shield material 6 and the contact member 7, so that the vicinity of the upper end surface of the electromagnetic wave shield door main body 1 An electromagnetic wave shield that prevents intrusion and leakage of unnecessary electromagnetic waves from the vehicle can be performed.
[0018]
Next, an electromagnetic wave shielding structure according to the present invention for preventing electromagnetic waves from entering or leaking from near the lower end surface portion 10 of the electromagnetic wave shielding door body 1 will be described in detail with reference to FIGS.
[0019]
As shown in FIGS. 3 and 4, the electromagnetic wave shielding structure of the lower end surface portion 10 of the electromagnetic wave shield door main body 1 which is brought into electrically conductive contact with a sill portion (an example of a conductive portion) 9 of the electromagnetic wave shield door frame 2 has a lower end surface portion. 10, a dovetail groove 13 having a fitting entrance 12 in a lateral end face 11 of the electromagnetic wave shielding door main body 1 is formed along the lower end side of the electromagnetic wave shielding door body 1, and an enlarged head 14 that can be fitted into the dovetail groove 13 is positioned on the upper side. A long member 15 provided in the portion is inserted into the dovetail groove 13 so as to be able to be inserted and removed from the fitting entrance 12, and a lower portion of the long member 15 is provided with a threshold 9 in accordance with opening and closing of the electromagnetic wave shielding door body 1. And a conductive contact member 16 which is in sliding contact therewith.
[0020]
The sill 9 is formed by filling a hollow body made of a zinc plate with urethane foam. The zinc plate electrically connects with an electromagnetic wave shielding layer (not shown) provided on a floor F in an electromagnetic wave shielding room. It is configured to be conductively connected to.
[0021]
The above-mentioned dovetail groove 13 is formed by forming a groove 13 having a longitudinal cross section having a downwardly convex shape in the longitudinal direction on one surface of a long aluminum metal member 17, and forming the other surface of the metal member 17. That is, the bottom surface side without the dovetail 13 is fixedly connected to the lower end surface portion 10 of the electromagnetic wave shield door body 1, that is, the lower end of the electromagnetic wave shield layer 5 by screwing, so that the dovetail groove 13 is formed in the electromagnetic wave shield door body 1. The lateral end face 11 has a fitting entrance 12 and is configured to extend along the lower end side of the electromagnetic wave shielding door main body 1.
[0022]
The elongate member 15 has an enlarged head 14 that can be fitted into the dovetail groove 13 on the upper part thereof, and the lower part is in sliding contact with the threshold part 9 with the opening and closing of the electromagnetic wave shielding door body 1. Thus, the conductive contact member 16 is provided. The conductive contact member 16 has a shape in which the lower end surface of the long member 15 is shaped along the upper end surface of the sill portion 9 and forms a concave portion 18 in the lower end surface along the longitudinal direction. A mohair-like conductive material is embedded therein.
[0023]
Therefore, the lower end of the electromagnetic wave shield layer 5, the metal member 17, the long member 15, the conductive contact member 16, and the sill 9 can be electrically conductively connected. An electromagnetic wave shield that prevents intrusion and leakage of unnecessary electromagnetic waves from the vicinity can be performed.
As shown in FIG. 4, the long member 15 can be easily inserted into and removed from the insertion port 12 of the lateral end face 11 of the electromagnetic wave shielding door body 1 (ie, can be freely removed), so that the conductive contact member 16 and the long member can be easily formed. 15 can be replaced, and maintenance of those conductive members can be performed.
[0024]
As shown in FIGS. 3 and 4, the shape of the upper end surface of the enlarged head 14 is formed to have a concave portion 19 along the longitudinal direction. If a leaf spring material (an example of an urging member) 20 that urges the long member 15 in the direction approaching the sill portion 9 is interposed between the and the enlarged head 14, that is, in the concave portion 19, In addition, the connection between the conductive members becomes more reliable, the efficiency of the electrical conductive connection is increased, and the electromagnetic wave shield can be made more reliable.
[0025]
As described above, according to the electromagnetic wave shielding structure of the present invention, an electromagnetic wave shield is formed by various conductive members that are electrically conductively connected from near the upper end to the surface of the main body and near the lower end of the electromagnetic wave shield door. In addition, unnecessary intrusion and leakage of electromagnetic waves can be prevented, and various conductive members can be easily maintained, and the reliability of the electromagnetic wave shield can be maintained.
[0026]
[Another embodiment]
Hereinafter, other embodiments will be described.
<1> In the present invention, the shape of the dovetail groove 13 is not limited to the vertically downwardly-convex vertical cross-sectional shape shown in the previous embodiment, but may be, for example, a shape as shown in FIG. In FIG. 5, the dovetail groove 13 is formed by providing a groove having a portion that extends in a substantially cross-shaped vertical cross-sectional shape and has a deep portion from one surface of a long aluminum metal member 22 in the longitudinal direction. The member 15 is configured so as to be able to be fitted into a deep part of the groove by the enlarged head 14 provided on the upper part thereof. Then, an urging member 20 is interposed in a gap space formed between the dovetail groove 13 and the upper end surface of the enlarged head 14 to urge the long member 15 downward, that is, in a direction approaching the conductive portion 9. You can also.
[0027]
In the present invention, the groove 13 is a groove formed along the lower end of the electromagnetic wave sealing door body 1 for inserting and removing the long member 15 from the side of the lateral end face 11 of the electromagnetic wave shielding door body 1. Operation can be performed, and (2) the groove is provided with a deepened portion, and when the long member 15 is mounted, the long member 15 is moved by the enlarged head 14 provided on the upper portion thereof. What is necessary is just to be configured so as to be locked to the expanding portion so as not to fall down from the dovetail groove 13, and is not limited to the example illustrated in the present embodiment, and may have any other shape.
[0028]
In the above embodiment, the metal members 17 and 22 are attached to the electromagnetic wave shielding door main body 1 and the groove 13 is formed on the lower end surface thereof. However, the groove is formed on the electromagnetic wave shielding door main body 1 itself. 13 may be formed integrally.
[0029]
<2> The electromagnetic wave shielding structure according to the present invention is not limited to the electromagnetic wave shielding chamber described in the above embodiment, but may be provided at other entrances or the like where electromagnetic waves need to be shielded.
[0030]
<3> The electromagnetic wave shielding door body has wooden surface decorative members 4A and 4B provided on the surface of the core material 3 described in the above embodiment, and has the electromagnetic wave shielding layer 5 between the core material and the surface decorative member 4A. The present invention is not limited to this, and may be, for example, one in which an electromagnetic wave shielding layer is provided between a plurality of wooden plate members, a frame made of a metal steel plate, or another known member. In addition, the electromagnetic shield door body 1 is not limited to an electromagnetic shield door that can be freely opened and closed by swinging operation around a vertical axis, and an open space is formed in the lateral end surface direction of the electromagnetic shield door body 1 with the opening and closing thereof. What is necessary is just to perform, and a thing of a sliding door type, a double door type, a revolving door type, etc. may be used.
[0031]
<4> The conductive contact member 16 is not limited to a brush (mohair) -shaped member, and may be a member that is in sliding contact with the conductive portion 9 and electrically conductively connected with opening and closing of the electromagnetic wave shield door body 1. For example, a conductive gasket or a beryllium finger may be used, or the long members 15 and 22 may be integrally formed of the same conductive material.
[0032]
<5> The biasing member 20 is not limited to the leaf spring material as described in the above embodiment, and has a biasing action such as a beryllium finger. Any elastic material that can be easily mounted between them is acceptable.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electromagnetic wave shield door having an electromagnetic wave shield structure according to the present invention. FIG. 2 is a longitudinal sectional view of an electromagnetic wave shield door having an electromagnetic wave shield structure according to the present invention. FIG. 3 is an electromagnetic wave shield shown in FIG. FIG. 4 is a perspective view of a main part of the electromagnetic wave shielding door shown in FIG. 2; FIG. 5 is a vertical cross-sectional view of a main part showing another embodiment;
1 Electromagnetic wave shield door body 2 Electromagnetic wave shield door frame
5 Electromagnetic wave shield layer 9 Conductive part 10 Lower surface part 11 of electromagnetic wave shield door main body Side end face 12 of electromagnetic wave shield door body 12 Entrance 13 Groove 14 Enlarged head 15 Long member 16 Conductive contact member
17 long metal member 20 urging member

Claims

A electromagnetic shielding structure of the lower end face portion of the electromagnetic wave shielding door body and a conductive portion of the electromagnetic wave shielding door frame and the electromagnetic wave shielding door body of the electromagnetic wave shielding layer contacting the conductive,
On the lower end surface portion, a long metal member having a dovetail groove having a fitting entrance on a lateral end surface of the electromagnetic wave shield door main body is fixedly connected along a lower end side of the electromagnetic wave shield door main body,
A long member having an enlarged head that can be fitted into the dovetail groove is mounted on the dovetail groove so that it can be freely inserted and removed from the fitting inlet, and a lower part of the long member is provided with the electromagnetic wave shield. Along with opening and closing of the door body, a conductive contact member is provided for sliding contact with the conductive portion, and when the elongated member is mounted in the dovetail, the elongated member is located between the dovetail and the enlarged head. An urging member that urges the member in a direction approaching the conductive portion is interposed, and the conductive portion and the electromagnetic wave shielding layer are in a state where the conductive contact member is in sliding contact with the conductive portion. An electromagnetic wave shielding structure characterized by being electrically conductively connected through the long member and the conductive contact member .