JP4085849B2

JP4085849B2 - Cover mounting device and cable rack cover mounting structure

Info

Publication number: JP4085849B2
Application number: JP2003068844A
Authority: JP
Inventors: 将司中山; 馨津田; 敏泰中積
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-03-13
Filing date: 2003-03-13
Publication date: 2008-05-14
Anticipated expiration: 2023-03-13
Also published as: JP2004282853A

Description

【０００１】
【発明の属する技術分野】
本発明は、ケーブルラックにカバーを取り付けるためのカバー取付装置、及びケーブルラックへのカバーの取付構造に関する発明である。
【０００２】
【従来の技術】
電気コードなどのケーブルＫを配線するケーブルラック１は、一般的に、一対の長尺の親桁４の間に複数の子桁５を間隔を隔てて架設して梯子状に形成され、親桁４と子桁５とで囲まれた配線空間ＳにケーブルＫを配設して使用される。なお、ケーブルラック１の表面には、その敷設場所の環境に耐え得るように、合成樹脂塗装やメラニン焼付塗装処理などの表面処理が施され、耐候性、防錆性、耐塩性、耐湿性、耐薬品性などを備えるようにされている。また、ケーブルラック１は、ケーブルラック１に配線したケーブルＫに漏電が発生した場合にも漏電電流を逃し得るように、ケーブルラック１全体を電気的に接続した状態にすることが必要な要件とされている。
【０００３】
ケーブルラック１は、上述したように内部にケーブルＫを配線したそのままの状態で使用されることもあるが、ケーブルラック１の敷設場所や配設するケーブルＫの種類などのケーブルラック１の使用条件によっては、配設するケーブルＫの保護などを目的として、図３３に示すようにケーブルラック１に適宜カバー２を取り付けて使用することもある（たとえば、特許文献１参照）。
【０００４】
ここで、図３３のものでは、カバー２のケーブルラック１への取り付けは、一端にフック部４０を設けると共に他端に雄ネジ部４１を設けたフックボルト４２と、カバー２の幅寸法よりも長いバー材４３とを用い、カバー２の幅方向の両端部を一対の親桁４の上に載置させるかたちでカバー２を一対の親桁４に架け渡して配置し、カバー２の幅方向に渡すようにバー材４３をカバー２上に載置し、バー材４３の長手方向の両端部をカバー２の幅方向端部から突出し、フック部４０を親桁４に引っ掛けた状態のフックボルト４２の雄ネジ部４１をバー材４３の長手方向の両端部に設けた貫通孔４４に挿通し、雄ネジ部４１にナット４５を螺合させ、バー材４３とフックボルト４２のフック部４０とでケーブルラック１及びカバー２を挟持させることで行われている。
【０００５】
ところで、ケーブルラック１にカバー２を取り付けした際には、ケーブルラック１のみならずカバー２も含めて電気的に接続した状態にさせることが必要とされる。ここで、カバー２の表面には、ケーブルラック１同様に耐候性などを備えさせる表面処理が施されており、この表面処理被膜に導電性は備えるものではないことから、上述したように単にカバー２をケーブルラック１に取り付けただけでは、ケーブルラック１とカバー２との電気的接続を図れるものではない。しかして、同文献では、カバー２とケーブルラック１との電気的接続を図るのに、図３４、３５のように、積層するカバー２と親桁４との間に、カバー２及び親桁４の各表面処理被膜を突き破って地金部分に食い込ませる導電部材４６を介在させることが提案されている。
【０００６】
【特許文献１】
特開平９−１６８２１７号公報
【０００７】
【発明が解決しようとする課題】
しかしながら、上記文献の提案を採用してカバー２をケーブルラック１に取り付けようとすると、カバー２のケーブルラック１への機械的接続及びカバー２のケーブルラック１への電気的接続のためにそれぞれ、別部材（バー材４３、導電部材４６など）を用いて行わせることになるので、カバー２のケーブルラック１への取り付けにかかる施工が煩雑になるといった問題がある。
【０００８】
本発明は上記の点に鑑みてなされたものであり、ケーブルラックとカバーとの機械的接続と電気的接続とを同一部材で行わせることで、取り付け施工の容易化を図ることのできるカバー取付装置、及びケーブルラックのカバー取付構造を提供することを課題とするものである。
【０００９】
【課題を解決するための手段】
上記課題を解決するために本発明の請求項１に係るカバー取付装置は、一対の長尺の親桁４の間に複数の子桁５を間隔を隔てて架設した梯子状のケーブルラック１に対し、その一対の親桁４間に被せるようにカバー２を取り付けるカバー取付装置３であって、親桁４及び子桁５の長手方向に直交する方向である親桁４の幅方向の一端に係止する係止部８と、係止部８の対向位置に位置してカバー２を取り付ける取着部９と、係止部８と取着部９とを連結して親桁４の幅方向に亙って添わせる連結部１０とを備え、取着部９にカバー２に対向するカバー対向部１２を設け、連結部１０に親桁４に対向するラック対向部１１を設け、ケーブルラック１に向けて締め付けることでケーブルラック１とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をラック対向部１１に設け、カバー２に向けて締め付けることでカバー２とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をカバー対向部１２に設けたことを特徴とする。
【００１０】
これによると、各ねじ貫通孔１７に通した各雄ねじ部材１８によって、ケーブルラック１とカバー取付装置３とが、またカバー２とカバー取付装置３とが、それぞれ電気的及び機械的に接続されることとなり、結果、カバー取付装置３を介してケーブルラック１とカバー２との機械的及び電気的接続を行わせることができるのであり、つまり、ケーブルラック１とカバー２との間の機械的接続及び電気的接続が一のカバー取付装置３にて行われ、簡単な構造で、電気的接続を伴なったカバー２のケーブルラック１への取り付けが可能となる。また、このカバー取付装置３は、特に、略水平に配設したケーブルラック１の一対の親桁４の上からカバー２を取り付ける際に有効に用いることができる。
【００１１】
上記課題を解決するために本発明の請求項２に係るカバー取付装置は、一対の長尺の親桁４の間に複数の子桁５を間隔を隔てて架設した梯子状のケーブルラック１に対し、その一対の親桁４間に被せるようにカバー２を取り付けるカバー取付装置３であって、一対の親桁４間に亙って配設して親桁４との間にカバー２を挟むバー材２１と、バー材２１の長手方向の端部と係合する係合部２４と、係合部２４から連設されて親桁４に係止する係止部８とを備え、係合部２４にカバー２に対向するカバー対向部１２を設け、係止部８に親桁４に対向するラック対向部１１を設け、ケーブルラック１に向けて締め付けることでケーブルラック１とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をラック対向部１１に設け、カバー２に向けて締め付けることでカバー２とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をカバー対向部１２に設けたことを特徴とする。
これによると、各ねじ貫通孔１７に通した各雄ねじ部材１８によって、ケーブルラック１とカバー取付装置３とが、またカバー２とカバー取付装置３とが、それぞれ電気的及び機械的に接続されることとなり、結果、カバー取付装置３を介してケーブルラック１とカバー２との機械的及び電気的接続を行わせることができるのであり、つまり、ケーブルラック１とカバー２との間の機械的接続及び電気的接続が一のカバー取付装置３にて行われ、簡単な構造で、電気的接続を伴なったカバー２のケーブルラック１への取り付けが可能となる。また、このカバー取付装置３は、特に、略水平に配設したケーブルラック１の一対の親桁４の下からカバー２を取り付ける際に有効に用いることができる。
【００１２】
また、請求項１または２において、少なくともラック対向部１１に補強用のフランジ縁１３を設けるのも好ましい。これによると、ねじ貫通孔１７への雄ねじ部材１８のねじ込み圧に対するラック対向部１１の剛性強度を向上させることができる。
【００１３】
また、請求項１乃至３のいずれか一項において、ラック対向部１１にカバー２やケーブルラック１の外形に対応する段部１６を形成するのも好ましい。これによると、この段部１６によってラック対向部１１をケーブルラック１に近接させることができ、ラック対向部１１のねじ貫通孔１７に挿通させてケーブルラック１に向けて締め付ける雄ねじ部材１８に長さが短いものを採用できる。
【００１４】
上記課題を解決するために本発明の請求項５に係るカバー取付装置は、一対の長尺の親桁４の間に複数の子桁５を間隔を隔てて架設した梯子状のケーブルラック１に対し、その一対の親桁４間に被せるようにカバー２を取り付けるカバー取付装置３であって、子桁５に係止する係止部８と、係止部８の対向位置に位置してカバー２を取り付ける取着部９と、係止部８と取着部９とを連結する連結部１０とを備え、係止部８に子桁５に対向するラック対向部１１を設け、取着部９にカバー２に対向するカバー対向部１２を設け、ケーブルラック１に向けて締め付けることでケーブルラック１とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をラック対向部１１に設け、カバー２に向けて締め付けることでカバー２とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をカバー対向部１２に設け、このカバー対向部１２に設けたねじ貫通孔１７をカバー２に設けた透孔２９に対応する位置に配置可能にしたことを特徴とする。
これによると、各ねじ貫通孔１７に通した各雄ねじ部材１８によって、ケーブルラック１とカバー取付装置３とが、またカバー２とカバー取付装置３とが、それぞれ電気的及び機械的に接続されることとなり、結果、カバー取付装置３を介してケーブルラック１とカバー２との機械的及び電気的接続を行わせることができるのであり、つまり、ケーブルラック１とカバー２との間の機械的接続及び電気的接続が一のカバー取付装置３にて行われ、簡単な構造で、電気的接続を伴なったカバー２のケーブルラック１への取り付けが可能となる。また、このカバー取付装置３は、特に、並設した親桁４における幅方向の一端部の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１をたとえば略垂直に配設し、子桁５が架設されない側である親桁４の幅方向の他端部の間にカバー２を架け渡すように取り付ける際に、有効に用いることができる。
【００１５】
上記課題を解決するために本発明の請求項６に係るカバー取付装置は、一対の長尺の親桁４の間に複数の子桁５を間隔を隔てて架設した梯子状のケーブルラック１に対し、その一対の親桁４間に被せるようにカバー２を取り付けるカバー取付装置３であって、子桁５に係止する係止部８と、係止部８と略同平面上に位置してカバー２を取り付ける取着部９と、係止部８と取着部９とを連結する連結部１０とを備え、係止部８に子桁５に対向するラック対向部１２を設け、取着部９にカバー２に対向するカバー対向部１１を設け、ケーブルラック１に向けて締め付けることでケーブルラック１とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をラック対向部１１に設け、カバー２に向けて締め付けることでカバー２とカバー取付装置３との電気的接続を行わせる雄ねじ部材１８がねじ込まれるねじ貫通孔１７をカバー対向部１２に設け、このカバー対向部１２に設けたねじ貫通孔１７をカバー２に設けた透孔２９に対応する位置に配置可能にしたことを特徴とする。
これによると、各ねじ貫通孔１７に通した各雄ねじ部材１８によって、ケーブルラック１とカバー取付装置３とが、またカバー２とカバー取付装置３とが、それぞれ電気的及び機械的に接続されることとなり、結果、カバー取付装置３を介してケーブルラック１とカバー２との機械的及び電気的接続を行わせることができるのであり、つまり、ケーブルラック１とカバー２との間の機械的接続及び電気的接続が一のカバー取付装置３にて行われ、簡単な構造で、電気的接続を伴なったカバー２のケーブルラック１への取り付けが可能となる。また、このカバー取付装置３は、特に、並設した親桁４における幅方向の一端部の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１をたとえば略垂直に配設し、子桁５が架設される上記親桁４の幅方向の一端部に間にカバー２を架け渡すように取り付ける際に、有効に用いることができる。
【００１６】
また、請求項１乃至６のいずれか一項において、上記ねじ貫通孔１７の孔内面にはそれぞれ雌ねじを刻設したことも好ましい。これによると、雄ねじ部材１８にセルフタッピングボルトではなく通常のボルトを用いることができ、雄ねじ部材１８のねじ貫通孔１７へのねじ込み作業を容易に行わせることができる。
【００１７】
また、請求項１乃至７のいずれか一項において、少なくとも一の雄ねじ部材１８の締め付けによってカバー２のケーブルラック１への本固定が行われるようにすることも好ましい。これによると、一の雄ねじ部材の締め付けによって機械的接続と電気的接続とを同時に行わせることができる。
【００１９】
また、ケーブルラックのカバー取付構造であって、親桁４と子桁５からなるケーブルラック１に、請求項１乃至８のいずれか一項に記載のカバー取付装置３を介してカバー２を取り付けたことを特徴とする。
【００２０】
【発明の実施の形態】
本発明は、親桁４と子桁５とからなるケーブルラック１にカバー２を取り付けるカバー取付装置３、及びこのカバー取付装置３を用いてカバー２をケーブルラック１に取り付けたケーブルラック１のカバー取付構造であり、ケーブルラック１とカバー２との機械的接続と電気的接続とを同一部材（カバー取付装置３）で行わせて取り付け施工の容易化を図ったことに発明の主旨がある。以下、本発明を添付図面に示す実施形態に基づいて説明するが、まず、本発明の前提となるケーブルラック１、カバー２について説明する。
【００２１】
ケーブルラック１は、一対の長尺の親桁４を平行に並べて配置し、この一対の親桁４の間に親桁４の長手方向に間隔を隔てて複数の子桁５を架設することで構成された梯子状の骨組体である。詳しくは、親桁４は、主体壁４ａの幅方向の両端部から内方に折り曲げた折曲壁４ｂを延設した断面略コ字状の長尺部材である。なお、主体壁４ａの幅方向の中央部分には内方に薄く凹没した凹条部６がその長手方向に亙って形成されている。また、子桁５は、底壁５ａの幅方向両端から側壁５ｂをそれぞれ立ち上げ、側壁５ｂの上端から対向する側壁５ｂに向けてリップ片５ｃを延設した断面リップ付きコ字状の長尺部材である。なお、各リップ片５ｃの突出端には底壁５ａに向けて突条片７が突設されている。そして、親桁４の一方の折曲壁４ｂの内面に子桁５の底壁５ａを載せると共に親桁４の長手方向及び幅方向と子桁５の長手方向とが略直交した位置関係を有するかたちで、一対の親桁４間に子桁５を架設することでケーブルラック１が形成されている。上記構成のケーブルラック１は、一対の対向する親桁４と複数の子桁５とで囲まれた配線空間Ｓに、電源ケーブルなどのケーブルＫを配線して使用される。なお、ケーブルラック１にはその表面に耐候性等を備えさせる被膜が表面処理によって施されている。この被膜は、ケーブルラック１の地金と異なり導電性は有さないものである。
【００２２】
カバー２は、ケーブルラック１の一対の親桁４の主体壁４ａ間の寸法にその幅寸法を略合わせた板面部２ａで主体が構成され、親桁４の折曲壁４ｂの外面に板面部２ａを積層配置したときに親桁４の主体壁４ａの外面に沿うような折曲部２ｂが、板面部２ａの幅方向の端部から延設されている。このカバー２は、ケーブルラック１の敷設場所などの使用状態によりケーブルラック１に適宜取り付けられるもので、ケーブルラック１同様、その表面には耐候性等を備えさせる被膜が表面処理によって施されている。この被膜は、カバー２の地金と異なり導電性は有さないものである。
【００２３】
なお、下記に挙げる本発明の実施の形態の諸例のカバー取付装置３は、その共通事項として、ケーブルラック１に係止させる係止部８と、カバー２を取り付ける取着部９と、係止部８と取着部９とを連結する一体物である連結部１０と、ケーブルラック１の一部に対向するラック対向部１１と、カバー２の一部に対向するカバー対向部１２とを有して構成したものである。
【００２４】
図１乃至図９に本発明の実施の形態の例を示す。本例のカバー取付装置３は、図２乃至図４に示すように、対向して位置する係止部８と取着部９とを連結部１０で連結した側面視コ字板状の金属部材である。ここでは、係止部８、取着部９及び連結部１０で囲まれる方向を内方と称して説明をする。具体的に本例のカバー取付装置３は、材料である板材１４の長手方向の一端と他端とをそれぞれ折り曲げて取着部９及び係止部８を形成すると共に、この折り曲げた一端と他端との間の板材１４の部位を連結部１０として構成されている。このように本例のカバー取付装置３は、一の板材１４で一体的に形成されたので、、構成部材点数が抑えられて構成が簡略化し、また簡単に形成可能なものであり、更には剛体化されて高い剛性強度が備えられている。また、本例のカバー取付装置３は、板材１４の長手方向に亙る板材１４の幅方向の端部を内方に折り曲げてフランジ縁１３を形成している。しかしてカバー取付装置３は、外面を構成せる板材１４の板面部１４ａの幅方向両端からフランジ縁１３をそれぞれ内方に延設したコ字状断面を全体に有している。この全体に亙るフランジ縁１３によってカバー取付装置３の剛性強度は向上している。また、本例の係止部８は、ケーブルラック１の親桁４に係止する部位であり、係止部８に位置したフランジ縁１３から内方に突出すると共にその突出先端で連結部１０側に折り曲げられたかぎ爪形状の爪部１５が設けられている。また、連結部１０には、連結部１０の係止部８に連続する部位に比べて連結部１０の取着部９に連続する部位を外方に位置させる段部１６が形成されている。この段部１６には、連結部１０の剛性強度を向上させる、カバー取付装置３をケーブルラック１に取り付けたときに連結部１０をケーブルラック１の親桁４の主体壁４ａの外面に近接させる（図８）といった効果がある。そして、連結部１０が親桁４の主体壁４ａの外面に近接されると、カバー取付装置の親桁４からの外方突出部分を低減でき、美観向上や安全性の向上に資することができる。なお、この段部１６は連結部１０と親桁４との形状に関係して適宜設けるものであり、この段部１６を設けないでもカバー取付装置の基本性能に支障をきたすものでないことは言うまでもない。
【００２５】
また、本例のカバー取付装置３の表面には、ケーブルラック１やカバー２と同様に、耐候性等を備えさせる被膜が表面処理によって施されている。この被膜もカバー取付装置３の地金と異なり導電性は有さないものである。また、このカバー取付装置３をケーブルラック１に取り付けた状態では、連結部１０における板面部１４ａの内面が親桁４の外面と対向すると共に、取着部９における板面部１４ａの内面がカバー２の外面と対向するのであり、上記連結部１０における板面部１４ａがラック対向部１１を構成し、取着部９における板面部１４ａがカバー対向部１２を構成している。このラック対向部１１及びカバー対向部１２には、内外に貫通して孔内面に雌ねじが刻設されたねじ貫通孔１７がそれぞれ穿孔され、ボルト等の雄ねじ部材１８をねじ込み可能にしている。なお、ラック対向部１１のねじ貫通孔１７は第１雄ねじ部材１８ａが螺入される第１ねじ貫通孔１７ａを構成し、カバー対向部１２のねじ貫通孔１７は第２雄ねじ部材１８ｂが螺入される第２ねじ貫通孔１７ｂを構成する。
【００２６】
以下には、このカバー取付装置３を用いて、カバー２をケーブルラック１に取り付ける施工例を示す。なお、ここでは、並設した親桁４における幅方向の一端部（以下、一方の折曲壁４ｂ）の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１を子桁５が下方に位置するように略水平に配設し、子桁５が架設されない側である親桁４の幅方向の他端部（以下、他方の折曲壁４ｂ）の間に上方からカバー２を架け渡すように取り付ける場合について説明する。
【００２７】
まず、図５のように、一対の親桁４における他方の折曲壁４ｂの外面間にカバー２を載置して架け渡すように配置し、親桁４における一方の折曲壁４ｂの内面にカバー取付装置３の爪部１５を引っ掛け、爪部１５を中心にカバー取付装置３全体を親桁４の主体壁４ａにその外側から近接させるよう回動させる（矢印Ａ）。そして、図６のように、回動させたカバー取付装置３の取着部９を他方の折曲壁４ｂに外側から被せるように近接させてカバー２の外面に沿わせるように位置させ、係止部８と取着部９とで親桁４の一対の折曲壁４ｂを把持するかたちで、カバー取付装置３をケーブルラック１に添わせて配置する。そして、図７のように、第１雄ねじ部材１８ａを第１ねじ貫通孔１７ａに挿入し、親桁４に向けて螺進させ、第１雄ねじ部材１８ａの先端を親桁４における主体壁４ａの外面に押し付けるように締め付ける。以上のようにして、カバー取付装置３がカバー２を挟んだ状態でケーブルラック１に機械的に取り付けられる。なお、本例ではその後、図８のように、第２雄ねじ部材１８ｂを第２ねじ貫通孔１７ｂに挿入し、カバー２に向けて螺進させ、第２雄ねじ部材１８ｂの先端をカバー２の外面に押し付けるように締め付けている。この第２雄ねじ部材１８ｂの締め付けによると、後述するカバー２とカバー取付装置３との電気的接続のほかに、カバー２をケーブルラック１に強く当接させ、カバー２のケーブルラック１にへの機械的接続の強化を行わせているものである。なお、図１，９には、カバー取付装置３を介してカバー２をケーブルラック１に機械的に取り付けた状態を示している。
【００２８】
詳しくは、上記各雄ねじ部材１８の締め付けによると、カバー取付装置３は、第１雄ねじ部材１８ａの先端と爪部１５との間に親桁４の一方の折曲壁４ｂを挟んで締め付けると共に、第２雄ねじ部材１８ｂの先端と係止部８との間にカバー２及び親桁４の主体壁４ａを挟んで締め付けるようになり、このようにカバー取付装置３はカバー２を挟んだ状態でケーブルラック１に強固に固定され、カバー２がケーブルラック１に強固に固定されるようになる。
【００２９】
更に言うと、第１雄ねじ部材１８ａを第１ねじ貫通孔１７ａに通してケーブルラック１の親桁４に向けて締め付けた際には、第１雄ねじ部材１８ａの先端がケーブルラック１の被膜を破ってケーブルラック１の地金に接触する。第１雄ねじ部材１８ａは第１ねじ貫通孔１７ａの孔内面でカバー取付装置３の地金と接触しているので、第１雄ねじ部材１８ａによってケーブルラック１とカバー取付装置３とが電気的に接続される。また、第２雄ねじ部材１８ｂを第２ねじ貫通孔１７ｂに通してカバー２に向けて締め付けた際にも、同様に、第２雄ねじ部材１８ｂの先端がカバー２の被膜を破ってカバー２の地金に接触する。この第２雄ねじ部材１８ｂも第２ねじ貫通孔１７ｂの孔内面でカバー取付装置３の地金と接触しているので、第２雄ねじ部材１８ｂによってカバー２とカバー取付装置３とが電気的に接続される。すなわち、カバー取付装置３を介してカバー２とケーブルラック１とが電気的に接続されるようになる。なお、各ねじ貫通孔１７の穿孔加工と表面処理とのタイミングによって各ねじ貫通孔１７の孔内面にも被膜が施されていても、各雄ねじ部材１８が各ねじ貫通孔１７の孔内面に刻設された雌ねじに螺入する際の擦れによって、孔内面の被膜は剥がれてカバー取付装置３の地金と各雄ねじ部材１８とが接触し、各雄ねじ部材１８とカバー取付装置３との電気的接続が確保されるのは言うまでもない。
【００３０】
上述したように、本例のカバー取付装置３を用いてケーブルラック１にカバー２を取り付けるようにすると、カバー取付装置３を介したケーブルラック１へのカバー２の機械的接続と同時にカバー２とケーブルラック１との電気的接続が行われるようになっている。つまり、カバー２とケーブルラック１との機械的接続及び電気的接続が、一の部材であるカバー取付装置３を用いるだけで行われるようにされ、簡単な構造で、電気的接続を伴なったカバー２のケーブルラック１への取り付けが行われるようにされているのである。
【００３１】
なお、本例のカバー取付装置３は、上記説明のように略水平に敷設したケーブルラック１にカバー２を上方から被せるかたちで取り付ける場合に用いるのに特に適しているが、略水平に敷設したケーブルラック１にカバー２を下方から被せるかたちで取り付ける場合（図１４参照）にも用いることが可能なのは言うまでもない。また、本例の場合、第１雄ねじ部材１８ａと第２雄ねじ部材１８ｂとを比較すると、第２雄ねじ部材１８ｂのねじ込みの役割はカバー２のケーブルラック１への押圧を伴なうことから機械的接続の色合いが強く、第１雄ねじ部材１８ａのねじ込みの役割はカバー取付装置３とケーブルラック１との電気的接続の色合いが強い。しかして、カバー取付装置３とケーブルラック１との電気的接続を別途アースボンド等にて行わせる場合等、状況に応じて第１雄ねじ部材１８ａのねじ込み作業は省略することができる。このように、カバー取付装置３は、状況によってはカバー２をケーブルラック１に機械的に取り付ける為だけに用いることも可能であり、状況に応じた施工に対応できるといった利点も有している。
【００３２】
上述したように本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付構造では、カバー２のケーブルラック１への電気的接続と機械的接続とを同一の部材（カバー取付装置３）で行わせており、状況に応じてカバー２のケーブルラック１への機械的接続だけを行わせるといった利便性も有している。また、それらの接続を、簡略な構成、簡略な作業で行うことができる。
【００３３】
以下、本発明の実施の形態の他例を列挙するが、先の実施の形態の例と同様部位には、同符合を付して説明を省き、異なる部位につき説明をしていく。
【００３４】
図１０乃至図１４に本発明の実施の形態の他例を示す。本例のカバー取付装置３は、一対のＬ字金具２０とバー材２１とを一体化して構成される（図１４）。Ｌ字金具２０は、図１０〜１２のように、材料である板材１４の長手方向の適所を略直交するように折り曲げて、垂設した垂直部２０ａの一端から略水平に水平部２０ｂを突設してなる側面視Ｌ字形状に形成された金属部材である。このＬ字金具２０は、垂直部２０ａと水平部２０ｂとで囲まれる方向を内方とすると、Ｌ字金具２０の材料である板材１４の板面部１４ａが外面を構成し、この板面部１４ａの幅方向両端からフランジ縁１３をそれぞれ内方に延設したコ字状断面を全体に有している。このフランジ縁１３はＬ字金具２０の剛性強度を向上させている。一方、バー材２１は、図１３のように、一対の親桁４間寸法と略同様の長さ寸法を有した長尺材である。このバー材２１は、断面リップ付きコ字状の断面を全体に有しており、具体的には、底壁部２１ａの幅方向の両端から側壁部２１ｂを立設すると共に側壁部２１ｂの先端から内方にリップ片部２１ｃを突設させて構成されている。このバー材２１では、その側壁部２１ｂが剛性強度を向上させる働きをしている。
【００３５】
Ｌ字金具２０の水平部２０ｂには、フランジ縁１３から内方に突出してその突出先端が垂直部２０ａ側に折り曲げられたかぎ爪形状の爪部２２が形成されている。この爪部２２は、バー材２１の長手方向の端部における底壁部２１ａに穿孔した係合孔２３に挿入係合するものである。この爪部２２と係合孔２３とでなる係合部２４を介して一対のＬ字金具２０の間にバー材２１を吊時するかたちで各部材２０，２１を一体化することで、本例のカバー取付装置３が形成される（図１４）。なお、一体化したＬ字金具２０とバー材２１とは、Ｌ字金具２０の水平部２０ｂにおける板面部１４ａとバー材２１の底壁部２１ａとが対向して位置し、Ｌ字金具２０の水平部２０ｂにおける板面部１４ａに穿設した第２ねじ貫通孔１７ｂとバー材２１の底壁部２１ａに穿孔したバー材貫通孔２５とが連通するようになっている。また、Ｌ字金具２０の垂直部２０ａの板面部１４ａには第１ねじ貫通孔１７ａが穿設されている。
【００３６】
以下には、このカバー取付装置３を用いて、カバー２をケーブルラック１に取り付ける施工例を示す。なお、ここでは、並設した親桁４における幅方向の一端部（以下、一方の折曲壁４ｂ）の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１を子桁５が下方に位置するように略水平に配設し、子桁５が架設される側である親桁４の幅方向の一端部（一方の折曲壁４ｂ）の間に下方からカバー２を架け渡すように取り付ける場合について説明する。
【００３７】
まず、係合部２４を介してバー材２１の長手方向の端部にそれぞれＬ字金具２０を取り付けて一体化させ、カバー取付装置３を形成させる。そして、ケーブルラック１の一対の親桁４の一方の折曲壁４ｂの間に下方から被せるようにカバー２を配置し、このカバー２をバー材２１のリップ片部２１ｃの外面上に載置させ、この状態でＬ字金具２０の垂直部２０ａを親桁４の主体壁４ａの外面に添わせて配置する。そして、図１３，１４のように、第１ねじ貫通孔１７ａに第１雄ねじ部材１８ａを親桁４の主体壁４ａの外面に向けて螺進させ、第１雄ねじ部材１８ａの先端を親桁４の主体壁４ａにおける凹条部６に引っ掛けた状態で締め付けることで、バー材２１と親桁４の折曲壁４ｂとの間にカバー２を挟んだ状態でカバー取付装置３がケーブルラック１に機械的に取り付けられる。つまり、カバー２はカバー取付装置３を介してケーブルラック１に強固に取り付けられる。なお、本例では後述するカバー取付装置３とカバー２との電気的接続のために、第２ねじ貫通孔１７ｂに第２雄ねじ部材１８ｂをカバー２に向けて螺進させ、第２雄ねじ部材１８ｂの先端をカバー２の外面に押し付けるように締め付けている。無論、第２雄ねじ部材１８ｂのカバー２に向けた締め付けにあっては、カバー２をケーブルラック１に向けて強く当接させることができるから、カバー２のケーブルラック１への機械的接続を強化させることができる。また、上述した作業手順は一例であり、この手順は適宜変更可能であるのは言うまでもない。
【００３８】
ここで、本例のカバー取付装置３にあって、親桁４の主体壁４ａの外面に対向されるＬ字金具２０の垂直部２０ａはラック対向部１１を構成しており、カバー２の外面に対向されるＬ字金具２０の水平部２０ｂはカバー対向部１２を構成している。また、第１ねじ貫通孔１７ａに螺入されてその先端が親桁４の凹条部６に係止する第１雄ねじ部材１８ａはケーブルラック１の親桁４に係止させる係止部８を構成し、バー材２１を介してカバー２を取着するＬ字金具２０の水平部２０ｂは取着部９を構成している。また、係止部８と取着部９とを連結する連結部１０はＬ字金具２０の全体の躯体（垂直部２０ａ、水平部２０ｂ）が構成している。
【００３９】
上述したように本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付作業でも、先の実施の形態の例同様、第１雄ねじ部材１８ａ及び第２雄ねじ部材１８ｂの締め付けの際に、第１雄ねじ部材１８ａ及び第２雄ねじ部材１８ｂの先端が当接するケーブルラック１やカバー２の被膜を剥がして各部材１，２の地金に接触され、カバー取付装置３を介したカバー２とケーブルラック１との機械的接続と同時に、カバー２とケーブルラック１とにカバー取付装置３を介した電気的接続が行われるようになっており、したがって、カバー２とケーブルラック１との機械的接続及び電気的接続が、一の部材であるカバー取付装置３を用いるだけで行われるから、簡単な構造で電気的接続を伴なったカバー２のケーブルラック１への機械的接続が可能にされている。
【００４０】
更に言うと、第１雄ねじ部材１８ａと第２雄ねじ部材１８ｂとを比較すると、第１雄ねじ部材１８ａのねじ込みの役割はケーブルラック１を両幅から挟みこんでカバー取付装置３をケーブルラック１に強固に固定する機械的接続の色合いが強く、一方、第２雄ねじ部材１８ｂのねじ込みの役割はカバー２とカバー取付装置３との電気的接続の色合いが強い。しかして、カバー取付装置３とカバー２との電気的接続を別途アースボンド等にて行わせる場合等、状況に応じて第２雄ねじ部材１８ｂのねじ込み作業は省略することができる。このように、カバー取付装置３は、状況によってはカバー２を介してカバー取付装置３をケーブルラック１に機械的に取り付ける為だけに用いることも可能であり、状況に応じた施工に対応できるといった利点も有している。
【００４１】
なお、本例のカバー取付装置３は、上記説明のように略水平に敷設したケーブルラック１にカバー２を下方から被せるかたちで取り付ける場合に用いるのに特に適しているが、略水平に敷設したケーブルラック１に上方から被せるかたちで取り付ける場合（図１参照）にも用いることが可能なのは言うまでもない。
【００４２】
上述したように本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付構造では、カバー２のケーブルラック１への電気的接続と機械的接続とを同一の部材（カバー取付装置３）で行わせており、状況に応じてカバー２のケーブルラック１への機械的接続だけを行わせるといった利便性も有している。また、それらの接続を、簡略な構成、簡略な作業で行うことができる。
【００４３】
図１５乃至図２３に本発明の実施の形態の更に他例を示す。本例のカバー取付装置３は、図１５に示すように、対向して位置する係止部８と取着部９とを連結部１０で連結した側面視コ字板状の金属部材である。具体的に、本例のカバー取付装置３は、材料である板材１４の長手方向の一端と他端とをそれぞれ折り曲げて取着部９及び係止部８を形成すると共に、該折り曲げた一端と他端との間の板材１４の部位を連結部１０とするように形成したものである。このように本例のカバー取付装置３は、一の板材１４にて形成されたことで、構成部材点数が抑えられて構成が簡略化し、また簡単に形成可能なものであり、更には剛体化されて高い剛性強度が備えられている。ここで、係止部８は平面視で略矩形状の外形形状を有し、その短辺長さａは子桁５の１対のリップ片５ｃ間の開口幅Ｈより短く形成されると共に、その長辺長さｂは該１対のリップ片５ｃ間の開口幅Ｈより長く形成されている。また、板状の連結部１０は係止部８の長辺である端縁に沿って立設されて取着部９に至るものであり、後述するように取着部９にカバー２を取着した際にはカバー２の自重を支持するようになる。この連結部１０には、カバー２の自重に対する剛性強度を高めるために、長さ方向に延伸して連結部１０に凹凸断面を形成する補強リブ２６が複数条並べて設けられている。なお、この連結部１０における係止部８から取着部９に至る長さ寸法は、略親桁４の幅方向寸法と略同等長さに設定されている。
【００４４】
ここで、本例のカバー取付装置３にあっては、子桁５内に係止される係止部８がラック対向部１１を構成しており、カバー２に対向する取着部９がカバー対向部１２を構成している。そして、ラック対向部１１である係止部８には第１ねじ貫通孔１７ａが、カバー対向部１２である取着部９には第２ねじ貫通孔１７ｂが穿孔されている。なお、本例の第２ねじ貫通孔１７ｂに挿入する第２雄ねじ部材１８ｂには、図１６に示す頭部２７の座面にカバー２の被膜を破って地金に接触する刃部２８が形成されたものを用いている。
【００４５】
以下には、このカバー取付装置３を用いて、カバー２をケーブルラック１に取り付ける施工例を示す。なお、ここでは、並設した親桁４における幅方向の一端部（以下、一方の折曲壁４ｂ）の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１を略垂直に配設し、子桁５が架設されず且つ子桁５のリップ片５ｃ間の開口方向に位置する親桁４の幅方向の他端部（以下、他方の折曲壁４ｂ）の間に側方からカバー２を架け渡すように取り付ける場合について説明する。
【００４６】
まず、図１７のように、ケーブルラック１の子桁５のリップ片５ｃ間の開口から子桁５の内方にカバー取付装置３の係止部８を挿入する。このときには、子桁５のリップ片５ｃ間の開口幅方向にカバー取付装置３の係止部８の短辺方向を合わせるようにして行う。そして、図１８のように、子桁５内に挿入した係止部８をその場で水平回転させ（矢印Ｂ）、係止部８の長辺の両端部を１対のリップ片５ｃの内方にもぐり込ませる。この状態は、係止部８の長辺の両端部が、子桁５の底壁５ａ内面とリップ片５ｃの突条片７との間で保持されるといった仮係止状態となっている。このように係止部８を子桁５内に係止させる作業は、上述したように子桁５内に挿入した係止部８をその場で水平回転させるといったものであり、簡略な構成で簡略且つスムーズに行わせることができて作業性の向上が図られている。そして、図１９のように、第１ねじ貫通孔１７ａに第１雄ねじ部材１８ａを挿入し、子桁５に向けて螺進させ、第１雄ねじ部材１８ａの先端を子桁５の底壁５ａの内面に押し付け締め付ける。この第１雄ねじ部材１８ａの締め付けによると、図２０のように、子桁５に仮係止された状態の係止部８が浮き上がって、係止部８の長辺の両端部がリップ片５ｃの突条片７の内面に押圧され、係止部８が子桁５に強固に係止・固定される。そして、図２１乃至２３のように、カバー２の板面部２ａに穿孔した透孔２９を第２ねじ貫通孔１７ｂに連通させるようにして、カバー２を一対の親桁４の他方の折曲壁４ｂに沿わせるように配置し、第２雄ねじ部材１８ｂをカバー２の外方から透孔２９に通して第２ねじ貫通孔１７ｂに螺入、締め付けることで、カバー２をカバー取付装置３の取着部９に固定させる。これにより、カバー取付装置３を介してカバー２はケーブルラック１に取り付けられる。ここで、カバー２がケーブルラック１に取付られた状態では、カバー取付装置３の板状の連結部１０は、カバー２の自重方向である親桁４の長手方向に連結部１０の幅方向が向いており、連結部１０にて有効にカバー２の自重を受けるようになっている。すなわち、連結部１０は、カバー２の自重の向き（垂直方向）に対して板面を向けない方向に設定され、カバー２の自重によるモーメントによる連結部１０の変形防止が図られ、カバー２の支持強度の向上が図られている。
【００４７】
また、第１雄ねじ部材１８ａを第１ねじ貫通孔１７ａに締め付けた際には、第１雄ねじ部材１８ａの先端がケーブルラック１の被膜を破ってケーブルラック１の地金に接触し、第１雄ねじ部材１８ａを介してケーブルラック１とカバー取付装置３とが電気的に接続される。一方、第２雄ねじ部材１８ｂを第２ねじ貫通孔１７ｂに締め付けた際には、第２雄ねじ部材１８ｂの頭部２７に設けた刃部２８がカバー２の被膜を破ってカバー２の地金に接触し、第２雄ねじ部材１８ｂを介してカバー２とカバー取付装置３とが電気的に接続される。しかして、カバー取付装置３を介してカバー２とケーブルラック１とが電気的に接続される。
【００４８】
上述したように本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付作業も、先の実施の形態の例同様、カバー取付装置３を介したカバー２とケーブルラック１との機械的接続と同時に、カバー２とケーブルラック１とにカバー取付装置３を介した電気的接続が行われるようになっている。したがって、カバー２とケーブルラック１との機械的接続及び電気的接続が、一のカバー取付装置３を用いるだけで行われ、簡単な構造で電気的接続を伴なったカバー２のケーブルラック１への機械的接続が可能にされているのである。更に言うと、本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付構造では、カバー２のケーブルラック１への電気的接続と機械的接続とを同一の部材（カバー取付装置３）で行わせており、具体的に電気的接続及び機械的接続を行わせる作業は雄ねじ部材１８ａ，１８ｂの締結作業であり、簡略な構成、簡略な作業で行うことができるようにされている利点も有している。
【００４９】
また、本例は、係止部８を子桁５内に係止させてカバー取付装置３をケーブルラック１に固定させた状態で、一体物である連結部１０を介して係止部８と連結した取着部９にカバー２を取着させてカバー２をケーブルラック１に取り付けるといったように、カバー２のケーブルラック１への取付作業が段階的に行えるようにされており、重量のあるカバー２やカバー取付装置３を同時に支持するといった一人の施工者で行うには困難な作業を無くするといった、施工の容易化が図られたものである。そして、この施工の容易化は、特に、略垂直に配設されたケーブルラック１に対してカバー２を取り付ける場合や、傾斜状態に敷設したケーブルラック１にカバー２を沿わせるかたちで取り付ける場合など、ケーブルラック１に沿わせて配置したカバー２が自身の重量でケーブルラック１に対して摺動してしまう可能性のある場合において、その効果は大きい。しかして、本例のカバー取付装置３は、上記説明のように略垂直、傾斜状態に敷設したケーブルラック１にカバー２を沿わせるかたちで取り付ける場合などの、ケーブルラック１に沿わせて配置したカバー２が自身の重量でケーブルラック１に対して摺動してしまう可能性のある場合に、用いるのに適している。しかしながら、略水平に敷設したケーブルラック１にカバー２を沿わせるかたちで取り付ける場合（図１参照）にも用いることが可能なのは言うまでもない。
【００５０】
図２４乃至図３２に本発明の実施の形態の更に他例を示す。本例のカバー取付装置３は、図２４に示す親金具３０と図２５に示す子金具３１とを一体化して構成される（図２６）。具体的に、親金具３０は、親金具３０の材料である板材１４の長手方向の中央域に幅方向に亙って凹没した凹没部１４ｂを形成し、凹没部１４ｂを間に挟んで位置する板材１４の長手方向の両端部を略同平面上に位置させた側面視フランジ付きＵ字形状の金属部材であり、この板材１４の長手方向の一端部で取着部９を、他端部で挿入部３２を、上記凹没部１４ｂで連結部１０をそれぞれ構成している。ここで、上記取着部９はカバー対向部１２を構成すると共に第２ねじ貫通孔１７ｂが穿孔されている。また、挿入部３２は子金具３１と一体化される部位であって、一体化した子金具３１と共にケーブルラック１に係止する係止部８を構成すると共に、子桁５の底壁５ａ内面に対向するラック対向部１１を構成し、第１ねじ貫通孔１７ａが穿孔されている。また、挿入部３２には親金具３０の幅方向の外方に突出したストッパ３３が形成されている。また、連結部１０における挿入部３２への連設部位には凹没部１４ｂの凹没空間ｓ内に突出する係止片３４が形成されている。
【００５１】
一方、子金具３１は、親金具３０の挿入部３２と一体化されて係止部８を構成する部材であり、親金具３０の挿入部３２を摺動可能に挿入する摺動部３５を有している。具体的に、子金具３１は、子金具３１の材料である板材１４の板面部１４ａの幅方向両端を下方に折り曲げて、側面視Ｌ字状の支持片３７を形成した正面視略逆Ｕ字状の金属部材である。上記摺動部３５は板面部１４ａと一対の支持片３７とで囲まれた空間が構成している。また、この板面部１４ａの中央部には板材１４の長さ方向の一端部からスリット３６が切り込まれており、スリット３６が切り込まれない板材１４の長さ方向の他端部は、子桁５のリップ片５ｃ内に係止する引掛部３８を構成している。
【００５２】
親金具３０と子金具３１との一体化は、図２６のように、親金具３０の挿入部３２を子金具３１の摺動部３５にスライド挿入し、親金具３０のストッパ３３を子金具３１の支持片３７上に載置させて、子金具３１の板面部１４ａと支持片３７とで挿入部３２を挟持させるように行われる。なお、このときには、スリット３６と第１ねじ貫通孔１７ａとは連通状態になると共に、衝突位置にあるストッパ３３と支持片３７とが摺動部３５からの挿入部３２の抜け止めを施している。ここで、一体化した親金具３０と子金具３１とからなるカバー取付装置３は、後述するように係止部８を子桁５内に係止させてケーブルラック１に固定される。
【００５３】
以下には、このカバー取付装置３を用いて、カバー２をケーブルラック１に取り付ける施工例を示す。なお、ここでは、並設した親桁４における幅方向の一端部（以下、一方の折曲壁４ｂ）の間に子桁５を架設してケーブルラック１を形成し、このケーブルラック１を略垂直に配設し、親桁４の一方の折曲壁４ｂの間に側方からカバー２を架け渡すように取り付ける場合について説明する。
【００５４】
まず、図２７のように、ケーブルラック１の親桁４の一方の折曲壁４ｂの間にカバー２を配置しておく。なお、カバー２には板面部２ａの適所に透孔２９が穿孔されている。そして、図２８のように、親金具３０の取着部９の第２ねじ貫通孔１７ｂをカバー２の透孔２９と連通状態にするように、親金具３０の係止片３４を子桁５のリップ片５ｃの突条片７に引っ掛け、親金具３０の挿入部３２を子桁５の内方に配置する。このときには、親金具３０の取着部９は挿入部３２に対して親桁４の長手方向の側に位置しており、挿入部３２と取着部９とを連結する連結部１０は子桁５の側壁５ｂを跨ぐように配置される。そして、親金具３０の挿入部３２を子金具３１の摺動部３５内に挿入して親金具３０と子金具３１とを一体化し、カバー取付装置３を形成する。そして、挿入部３２に被せて配置された子金具３１の上から連通状態のスリット３６及び第１ねじ貫通孔１７ａに第１雄ねじ部材１８ａを子桁５の底壁５ａに向けて軽く螺入させる。このときには、第１雄ねじ部材１８ａの先端が子桁５の底壁５ａ内面を押圧してカバー取付装置３を浮き上げ、親金具３０の係止片３４を子桁５のリップ片５ｃ内面に押圧して係止部８を子桁５の内方に軽く係止させ、カバー取付装置３をケーブルラック１に仮固定させる。そして、図２９に示すように、透孔２９及び第２ねじ貫通孔１７ｂに第２雄ねじ部材１８ｂを螺入してカバー２とカバー取付装置３とを固定する。なお、第２雄ねじ部材１８ｂには、先の実施の形態の例同様、頭部２７の座面にカバー２の被膜を破って地金に接触する刃部２８が形成されたものを用いる（図１６参照）。この第２ねじ貫通孔１７ｂに第２雄ねじ部材１８ｂを螺合させたときには、第２雄ねじ部材１８ｂの頭部２７の刃部２８がカバー２の被膜を削ってカバー２の地金に接触し、第２雄ねじ部材１８ｂを介してカバー２とカバー取付装置３との機械的・電気的接続がなされる。そして、図３０のように、挿入部３２を摺動部３５内にスライドさせるべく子金具３１をスライドし（矢印Ｃ）、親金具３０の係止片３４が係止されない側のリップ片５ｃ内に子金具３１の引掛部３８をもぐり込ませる。そして、スリット３６及び第１ねじ貫通孔１７ａに螺合されている第１雄ねじ部材１８ａを子桁５の底壁５ａの内面に向ってきつく締めつけることで、係止部８を子桁５の内方に強く係止させ、カバー取付装置３をケーブルラック１に固定させる。この状態では、図３１，３２のように、第１雄ねじ部材１８ａの締め付けにしたがって、カバー取付装置３が子桁５の底壁５ａの内面から離れるように浮き上がり、親金具３０の係止片３４及び子金具３１の引掛部３８が子桁５の両リップ片５ｃの内面に強く押圧されることから、係止部８が子桁５の内方に強く係止されてカバー取付装置３のケーブルラック１への強固な固定が確保されている。以上のように、カバー取付装置３を介してカバー２がケーブルラック１に取り付けられる。なお、上述した施工手順は一例であって適宜変更可能であり、たとえば挿入部３２を摺動部３５に挿入してカバー取付装置３を形成した後に、このカバー取付装置３の係止部８を子桁５内に配設、固定する手順をふんでもよい。
【００５５】
ここで、第１雄ねじ部材１８ａを第１ねじ貫通孔１７ａに締め付けた際には、第１雄ねじ部材１８ａの先端がケーブルラック１の被膜を破ってケーブルラック１の地金に接触し、第１雄ねじ部材１８ａを介してケーブルラック１とカバー取付装置３とが電気的に接続される。一方、第２雄ねじ部材１８ｂを第２ねじ貫通孔１７ｂに締め付けた際には、第２雄ねじ部材１８ｂの頭部２７に設けた刃部２８がカバー２の被膜を破ってカバー２の地金に接触し、第２雄ねじ部材１８ｂを介してカバー２とカバー取付装置３とが電気的に接続される。しかして、カバー取付装置３を介してカバー２とケーブルラック１とが電気的に接続される。
【００５６】
上述したように、本例のカバー取付装置３を用いてケーブルラック１にカバー２を取り付けるようにすると、先の実施の形態の例同様、カバー取付装置３を介したカバー２とケーブルラック１との機械的接続と同時に、カバー２とケーブルラック１とにカバー取付装置３を介した電気的接続が行われるようになっている。したがって、カバー２とケーブルラック１との機械的接続及び電気的接続が、一のカバー取付装置３を用いるだけで行われ、簡単な構造で電気的接続を伴なったカバー２のケーブルラック１への機械的接続が可能にされている。更に言うと、本例のカバー取付装置３を用いたカバー２のケーブルラック１への取付構造では、カバー２のケーブルラック１への電気的接続と機械的接続とを同一の部材（カバー取付装置３）で行わせており、具体的に電気的接続及び機械的接続を行わせる作業は雄ねじ部材１８ａ，１８ｂの締結作業であり、簡略な構成、簡略な作業で行うことができるようにされている利点も有している。
【００５７】
また、図１５乃至２３の例同様、係止部８を子桁５内に係止させたカバー取付装置３の取着部９にカバー２を取着させて、カバー２をケーブルラック１に取り付けるといったように、カバー２のケーブルラック１への取付作業が段階的に行えるようにされているので、ケーブルラック１に対してカバー２及びカバー取付装置３を同時に所定位置に維持させた状態で各部材の連結作業を行わせる、といった一人の施工者では対応困難な作業を無くするようにされ、施工の容易化が図られている。しかして、上記説明のように略垂直に敷設したケーブルラック１にカバー２を沿わせるかたちで取り付ける場合や、傾斜状態に敷設したケーブルラック１にカバー２を沿わせるかたちで取り付ける場合など、つまりケーブルラック１に沿わせて配置したカバー２が自身の重量でケーブルラック１に対して摺動してしまう可能性のある場合に用いるのに適しているが、略水平に敷設したケーブルラック１にカバー２を沿わせるかたちでケーブルラック１にカバー２を取り付ける場合（図１４参照）にも用いることが可能なのは言うまでもない。
【００５８】
また、図示はしないが、本例におけるカバー取付装置３を、子金具３１を廃し、連結部１０から折り曲げて突出される挿入部３２の突出先端に引掛部３８を設けてなる親金具３０のみで構成するといった一体形成物のカバー取付装置３にしても、子桁５の両リップ片５ｃに引掛部３８及び係止片３４を係止させることで子桁５内に親金具３０を係止可能にすれば、代替して用いることができる。
【００５９】
また、本例に限らず図１０乃至１４の例にも言えることであるが、子桁５に添わせるようにカバー２をケーブルラック１に取り付ける場合であって、図示はしないが、子桁５の底壁５ａの外面が親桁４の折曲壁４ｂの内面に載置固定された際には、子桁５の底壁５ａの外面と親桁４の折曲壁４ｂの外面との高さレベルには厳密には親桁４の折曲壁４ｂの厚み分の段差が形成されるのであるが、扁平板状の板面部２ａのみで構成したカバー２を上記段差内に収めるように配置してもよく、また、積層する子桁５の底壁５ａの外面と親桁４の折曲壁４ｂの内面との間に隙間が形成されて子桁５が親桁４間に架設された際には、扁平板状の板面部２ａのみで構成したカバー２の幅方向の端部を上記隙間に挟み込ませたかたちで、カバー２を配置してもよいのは言うまでもない。
【００６０】
【発明の効果】
上記のように本発明の請求項１の発明にあっては、ケーブルラックとカバーとの間の機械的接続及び電気的接続が一のカバー取付装置にて行わせることができるから、簡単な構造で、電気的接続を伴なったカバーのケーブルラックへの取り付けが可能となる。また、略水平に配設したケーブルラックの一対の親桁の上からカバーを取り付ける際に用いることが適切なカバー取付装置とすることができる。
【００６１】
また、請求項２の発明にあっては、ケーブルラックとカバーとの間の機械的接続及び電気的接続が一のカバー取付装置にて行わせることができるから、簡単な構造で、電気的接続を伴なったカバーのケーブルラックへの取り付けが可能となる。また、略水平に配設したケーブルラックの一対の親桁の下からカバーを取り付ける際に用いることが適切なカバー取付装置とすることができる。
【００６２】
また、請求項３の発明にあっては、上記請求項１または２の効果に加え、ねじ貫通孔への雄ねじ部材のねじ込み圧に対するラック対向部の剛性強度を向上させ、ひいてはカバー取付装置の強度、カバーのケーブルラックへの取付構造の強度の向上を図ることができる。
【００６３】
また、請求項４の発明にあっては、上記請求項１乃至３のいずれか一項の効果に加え、ラック対向部をケーブルラックに近接させることができ、ラック対向部のねじ貫通孔に挿通させてケーブルラックに向けて締め付ける雄ねじ部材に、長さが短いものを採用でき、部品コストの低減を図ることができる。
【００６４】
また、請求項５の発明にあっては、ケーブルラックとカバーとの間の機械的接続及び電気的接続が一のカバー取付装置にて行わせることができるから、簡単な構造で、電気的接続を伴なったカバーのケーブルラックへの取り付けが可能となる。また、並設した親桁における幅方向の一端部の間に子桁を架設してケーブルラックを形成し、このケーブルラックをたとえば略垂直に配設し、子桁が架設されない側である親桁の幅方向の他端部の間に架け渡すようにカバーを取り付ける際に用いることが適切なカバー取付装置とすることができる。
【００６５】
また、請求項６の発明にあっては、ケーブルラックとカバーとの間の機械的接続及び電気的接続が一のカバー取付装置にて行わせることができるから、簡単な構造で、電気的接続を伴なったカバーのケーブルラックへの取り付けが可能となる。また、並設した親桁における幅方向の一端部の間に子桁を架設してケーブルラックを形成し、このケーブルラックをたとえば略垂直に配設し、子桁が架設される上記親桁の幅方向の一端部に間に架け渡すようにカバーを取り付ける際に用いることが適切なカバー取付装置とすることができる。
【００６６】
また、請求項７の発明にあっては、上記請求項１乃至６のいずれか一項の効果に加え、雄ねじ部材には、セルフタッピングボルトではなく通常のボルトを用いることができ、雄ねじ部材の低廉化や、雄ねじ部材のねじ貫通孔へのねじ込み作業の容易化を図ることができる。
【００６７】
また、請求項８の発明にあっては、上記請求項１乃至７のいずれか一項の効果に加え、一の雄ねじ部材の締め付けによって機械的接続と電気的接続とを同時に行わせることができ、作業の効率化を図ることができる。
【００６９】
また、請求項９の発明は、ケーブルラックのカバー取付構造であるが、請求項１乃至８のいずれか一項に記載のカバー取付装置を介してカバーを取り付けたので、カバー取付装置を介在させるだけの簡単な構造で、電気的接続を伴なったカバーのケーブルラックへの取り付け（機械的接続）が可能となっているのである。
【図面の簡単な説明】
【図１】本発明の実施の形態の例のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の全体斜視図である。
【図２】同上のカバー取付装置の斜視図である。
【図３】同上のカバー取付装置を示し、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は右側面図であり、（ｄ）は上面図であり、（ｅ）は下面図である。
【図４】同上のカバー取付装置を示し、（ａ）は図３（ａ）の背面図であり、（ｂ）は図３（ｄ）のＤ−Ｄ線断面図である。
【図５】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図６】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図７】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図８】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図９】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図１０】本発明の実施の形態の他例のカバー取付装置のＬ字金具の斜視図である。
【図１１】同上のＬ字金具を示し、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は右側面図であり、（ｄ）は上面図であり、（ｅ）は下面図である。
【図１２】同上のＬ字金具を示し、（ａ）は図１１（ａ）の背面図であり、（ｂ）は図１１（ｄ）のＥ−Ｅ線断面図である。
【図１３】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の要部の斜視図である。
【図１４】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の全体斜視図である。
【図１５】本発明の実施の形態の更に他例のカバー取付装置を示し、（ａ）は正面図であり、（ｂ）は側面図であり、（ｃ）は上面図であり、（ｄ）は（ａ）のＦ−Ｆ線断面図である。
【図１６】同上の第２雄ねじ部材の側面図である。
【図１７】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図１８】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図１９】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図２０】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図２１】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図２２】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の全体斜視図である。
【図２３】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態を示し、（ａ）は子桁の長さ方向から見た側面断面図であり、（ｂ）はカバーを透視した上面図であり、（ｃ）は親桁の長手方向から見た側面断面図である。
【図２４】本発明の実施の形態の更に他例のカバー取付装置の親金具を示し、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は下面図である。
【図２５】同上のカバー取付装置の子金具を示し、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は下面図である。
【図２６】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態を示し、（ａ）は子桁の長手方向から見た側面断面図であり、（ｂ）は上面図であり、（ｃ）は親桁の長手方向から見た側面断面図である。
【図２７】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図２８】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図２９】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図３０】同上のカバー取付装置を用いたカバーのケーブルラックへの取付作業を説明する説明図である。
【図３１】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の要部の斜視図である。
【図３２】同上のカバー取付装置を用いてカバーをケーブルラックに取り付けた状態の全体斜視図である。
【図３３】従来技術の例を示す分解斜視図である。
【図３４】同上のカバーとケーブルラックとの電気的接続を説明する分解斜視図である。
【図３５】同上のカバーとケーブルラックとの電気的接続を説明する要部の側面断面図である。
【符号の説明】
１ケーブルラック
２カバー
３カバー取付装置
４親桁
５子桁
１１ラック対向部
１２カバー対向部
１７ねじ貫通孔
１７ａ第１ねじ貫通孔
１７ｂ第２ねじ貫通孔
１８雄ねじ部材
１８ａ第１雄ねじ部材
１８ｂ第２雄ねじ部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover attachment device for attaching a cover to a cable rack and a structure for attaching the cover to the cable rack.
[0002]
[Prior art]
A cable rack 1 for routing a cable K such as an electric cord is generally formed in a ladder shape by laying a plurality of child beams 5 with a space between a pair of long parent beams 4. A cable K is provided in the wiring space S surrounded by 4 and the child beam 5 and used. In addition, the surface of the cable rack 1 is subjected to a surface treatment such as a synthetic resin coating or a melanin baking coating so as to withstand the environment of the laying place, and weather resistance, rust resistance, salt resistance, moisture resistance, It is designed to have chemical resistance. Further, the cable rack 1 is required to be in a state where the entire cable rack 1 is electrically connected so that the leakage current can be released even when the cable K wired to the cable rack 1 is leaked. Has been.
[0003]
Although the cable rack 1 may be used as it is with the cable K routed inside as described above, the usage conditions of the cable rack 1 such as the laying location of the cable rack 1 and the type of the cable K to be arranged are used. In some cases, for the purpose of protecting the cable K to be disposed, the cover 2 is appropriately attached to the cable rack 1 as shown in FIG. 33 (see, for example, Patent Document 1).
[0004]
In FIG. 33, the cover 2 is attached to the cable rack 1 with a hook bolt 40 provided with a hook 40 at one end and a male screw 41 at the other end, and a width dimension of the cover 2. A long bar member 43 is used, and the cover 2 is placed across the pair of parent beams 4 in such a manner that both ends in the width direction of the cover 2 are placed on the pair of parent beams 4. The bar bolt 43 is placed on the cover 2 so as to pass to the cover 2, both end portions in the longitudinal direction of the bar member 43 protrude from the end portions in the width direction of the cover 2, and the hook portion 40 is hooked on the parent beam 4. The male screw part 41 of 42 is inserted into the through holes 44 provided at both ends in the longitudinal direction of the bar member 43, the nut 45 is screwed into the male screw part 41, and the bar member 43 and the hook part 40 of the hook bolt 42 are connected. Hold the cable rack 1 and the cover 2 with It has been carried out in the.
[0005]
By the way, when the cover 2 is attached to the cable rack 1, it is necessary that the cable rack 1 and the cover 2 are electrically connected together. Here, since the surface of the cover 2 is subjected to a surface treatment that provides weather resistance and the like, similar to the cable rack 1, and the surface treatment film does not have conductivity, the cover is simply covered as described above. Simply attaching 2 to the cable rack 1 does not enable electrical connection between the cable rack 1 and the cover 2. Therefore, in this document, in order to achieve electrical connection between the cover 2 and the cable rack 1, as shown in FIGS. 34 and 35, the cover 2 and the parent beam 4 are disposed between the cover 2 and the parent beam 4 to be stacked. It has been proposed to interpose a conductive member 46 that breaks through each of the surface-treated coatings and bites into the bare metal portion.
[0006]
[Patent Document 1]
JP-A-9-168217
[0007]
[Problems to be solved by the invention]
However, when the cover 2 is attached to the cable rack 1 by adopting the proposal of the above document, the cover 2 is mechanically connected to the cable rack 1 and the cover 2 is electrically connected to the cable rack 1, respectively. Since another member (the bar member 43, the conductive member 46, etc.) is used, there is a problem that the construction for attaching the cover 2 to the cable rack 1 becomes complicated.
[0008]
The present invention has been made in view of the above points, and by making the mechanical connection and the electrical connection between the cable rack and the cover by the same member, it is possible to facilitate the installation work. It is an object of the present invention to provide a device and a cable rack cover mounting structure.
[0009]
[Means for Solving the Problems]
  To solve the above problems, the present inventionClaim 1The cover mounting device according toA cover mounting device for attaching a cover 2 to a ladder-shaped cable rack 1 in which a plurality of child beams 5 are installed between a pair of long main beams 4 at intervals. 3 and a locking portion 8 that is locked to one end in the width direction of the main beam 4, which is a direction orthogonal to the longitudinal direction of the parent beam 4 and the child beam 5, An attachment portion 9 to which the cover 2 is attached, and a connecting portion 10 that connects the locking portion 8 and the attachment portion 9 and attaches them along the width direction of the main beam 4 are provided. A cover facing portion 12 is provided to face the rack, and a rack facing portion 11 is provided to the connecting portion 10 to face the main beam 4.Then, a screw through hole 17 into which a male screw member 18 that makes electrical connection between the cable rack 1 and the cover mounting device 3 is tightened toward the cable rack 1 is provided in the rack facing portion 11 and tightened toward the cover 2. Thus, a screw through hole 17 into which the male screw member 18 for electrical connection between the cover 2 and the cover mounting device 3 is screwed is provided in the cover facing portion 12.
[0010]
  According to this, the cable rack 1 and the cover mounting device 3, and the cover 2 and the cover mounting device 3 are electrically and mechanically connected to each other by the male screw members 18 passed through the screw through holes 17. As a result, the mechanical and electrical connection between the cable rack 1 and the cover 2 can be performed via the cover mounting device 3, that is, the mechanical connection between the cable rack 1 and the cover 2. In addition, the electrical connection is performed by the single cover attachment device 3, and the cover 2 with electrical connection can be attached to the cable rack 1 with a simple structure.The cover mounting device 3 can be effectively used particularly when the cover 2 is mounted from above the pair of parent beams 4 of the cable rack 1 disposed substantially horizontally.
[0011]
  In order to solve the above-mentioned problem, a cover mounting device according to claim 2 of the present invention is provided with a ladder-like cable rack 1 in which a plurality of child girders 5 are installed between a pair of long main girders 4 at intervals. On the other hand, it is a cover mounting device 3 for attaching the cover 2 so as to be covered between the pair of parent girders 4, which is arranged between the pair of parent girders 4 and sandwiches the cover 2 between the parent girders 4. A bar member 21; an engaging portion 24 that engages with an end portion in the longitudinal direction of the bar member 21; and an engaging portion 8 that is provided continuously from the engaging portion 24 and engages with the main beam 4; The cover facing portion 12 facing the cover 2 is provided in the portion 24, the rack facing portion 11 facing the main beam 4 is provided in the locking portion 8, and the cable rack 1 and the cover mounting device 3 are tightened toward the cable rack 1. A screw through hole 17 into which a male screw member 18 for electrical connection to the rack is paired with a rack pair. A screw through hole 17 into which a male screw member 18 that is provided in the portion 11 and is tightened toward the cover 2 to electrically connect the cover 2 and the cover mounting device 3 is screwed is provided in the cover facing portion 12. To do.
According to this, the cable rack 1 and the cover mounting device 3, and the cover 2 and the cover mounting device 3 are electrically and mechanically connected to each other by the male screw members 18 passed through the screw through holes 17. As a result, the mechanical and electrical connection between the cable rack 1 and the cover 2 can be performed via the cover mounting device 3, that is, the mechanical connection between the cable rack 1 and the cover 2. In addition, the electrical connection is performed by the single cover attachment device 3, and the cover 2 with electrical connection can be attached to the cable rack 1 with a simple structure. Further, the cover mounting device 3 can be effectively used particularly when the cover 2 is mounted from below the pair of parent beams 4 of the cable rack 1 disposed substantially horizontally.
[0012]
  Also,In Claim 1 or 2, it is also preferable to provide a flange edge 13 for reinforcement at least on the rack facing portion 11. According to this, the rigidity strength of the rack facing portion 11 with respect to the screwing pressure of the male screw member 18 into the screw through hole 17 can be improved.
[0013]
  Also,In any one of Claims 1 thru | or 3, it is also preferable to form the step part 16 corresponding to the external shape of the cover 2 or the cable rack 1 in the rack opposing part 11. FIG. According to this, the rack facing portion 11 can be brought close to the cable rack 1 by the stepped portion 16, and the male screw member 18 inserted into the screw through hole 17 of the rack facing portion 11 and tightened toward the cable rack 1 has a length. A short one can be adopted.
[0014]
  In order to solve the above problems, a cover mounting device according to claim 5 of the present invention isA cover mounting device for attaching a cover 2 to a ladder-shaped cable rack 1 in which a plurality of child beams 5 are installed between a pair of long main beams 4 at intervals. 3 andAn engaging portion 8 that engages with the child beam 5, an attachment portion 9 that is located at a position opposite to the engaging portion 8 and attaches the cover 2, and a connecting portion 10 that connects the engaging portion 8 and the attaching portion 9. A rack facing portion 11 that faces the child beam 5 is provided in the locking portion 8, a cover facing portion 12 that faces the cover 2 is provided in the attachment portion 9, and the cable rack 1 is tightened toward the cable rack 1. A screw through hole 17 into which a male screw member 18 for electrical connection between the cover 1 and the cover mounting device 3 is screwed is provided in the rack facing portion 11 and is tightened toward the cover 2, whereby the electrical connection between the cover 2 and the cover mounting device 3 is performed. A screw through-hole 17 into which the male screw member 18 to be connected is screwed is provided in the cover facing portion 12, and the screw through-hole 17 provided in the cover facing portion 12 is disposed at a position corresponding to the through hole 29 provided in the cover 2. Features that made it possible That.
According to this, the cable rack 1 and the cover mounting device 3, and the cover 2 and the cover mounting device 3 are electrically and mechanically connected to each other by the male screw members 18 passed through the screw through holes 17. As a result, the mechanical and electrical connection between the cable rack 1 and the cover 2 can be performed via the cover mounting device 3, that is, the mechanical connection between the cable rack 1 and the cover 2. In addition, the electrical connection is performed by the single cover attachment device 3, and the cover 2 with electrical connection can be attached to the cable rack 1 with a simple structure. In addition, the cover mounting device 3 particularly forms a cable rack 1 by laying a child girder 5 between one end portion in the width direction of the parent girder 4 arranged side by side, and the cable rack 1 is arranged substantially vertically, for example. When the cover 2 is mounted so as to be bridged between the other ends in the width direction of the main beam 4 on the side where the child beam 5 is not installed, it can be used effectively.
[0015]
  In order to solve the above problem, a cover mounting apparatus according to a sixth aspect of the present invention is a ladder-shaped cable rack 1 in which a plurality of child beams 5 are installed between a pair of long parent beams 4 with a space therebetween. On the other hand, it is a cover mounting device 3 for attaching the cover 2 so as to be covered between the pair of parent girders 4, and is located on substantially the same plane as the latching portion 8 that latches to the child girder 5. Mounting portion 9 for attaching the cover 2 and a connecting portion 10 for connecting the locking portion 8 and the mounting portion 9 to each other. A screw through-hole into which a male screw member 18 is provided for making an electrical connection between the cable rack 1 and the cover mounting device 3 by providing a cover facing portion 11 facing the cover 2 in the attachment portion 9 and tightening it toward the cable rack 1. 17 is provided in the rack facing part 11 and tightened toward the cover 2 The screw through hole 17 into which the male screw member 18 for electrical connection between the cover 2 and the cover mounting device 3 is screwed is provided in the cover facing portion 12, and the screw through hole 17 provided in the cover facing portion 12 is provided in the cover 2. It is possible to dispose at a position corresponding to the through hole 29 provided in.
According to this, the cable rack 1 and the cover mounting device 3, and the cover 2 and the cover mounting device 3 are electrically and mechanically connected to each other by the male screw members 18 passed through the screw through holes 17. As a result, the mechanical and electrical connection between the cable rack 1 and the cover 2 can be performed via the cover mounting device 3, that is, the mechanical connection between the cable rack 1 and the cover 2. In addition, the electrical connection is performed by the single cover attachment device 3, and the cover 2 with electrical connection can be attached to the cable rack 1 with a simple structure. In addition, the cover mounting device 3 particularly forms a cable rack 1 by laying a child girder 5 between one end portion in the width direction of the parent girder 4 arranged side by side, and the cable rack 1 is arranged substantially vertically, for example. It can be used effectively when the cover 2 is mounted so as to be bridged to one end portion in the width direction of the parent beam 4 on which the child beam 5 is installed.
[0016]
  Also,In any one of Claims 1 thru | or 6, it is also preferable that the internal thread was engraved in the hole inner surface of the said screw through-hole 17, respectively. According to this, a normal bolt can be used for the male screw member 18 instead of a self-tapping bolt, and the screwing operation of the male screw member 18 into the screw through hole 17 can be easily performed.
[0017]
  Also,In any one of Claims 1 to 7, it is also preferable that the fixing of the cover 2 to the cable rack 1 is performed by tightening at least one male screw member 18. According to this, mechanical connection and electrical connection can be performed simultaneously by tightening one male screw member.
[0019]
  The cable rack has a cover mounting structure, in which the cable rack 1 including the main beam 4 and the child beam 5 is attached to the cable rack 1.Claims 1 to 8eitherOne paragraphThe cover 2 is attached via the cover attaching device 3 described in the above item.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a cover mounting device 3 for attaching a cover 2 to a cable rack 1 composed of a main beam 4 and a child beam 5, and a cover of the cable rack 1 in which the cover 2 is mounted to the cable rack 1 using the cover mounting device 3. The gist of the present invention is that the mounting structure is such that the mechanical connection and the electrical connection between the cable rack 1 and the cover 2 are made by the same member (cover mounting device 3) to facilitate the mounting work. Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. First, a cable rack 1 and a cover 2 which are the premise of the present invention will be described.
[0021]
In the cable rack 1, a pair of long main beams 4 are arranged side by side in parallel, and a plurality of child beams 5 are installed between the pair of main beams 4 at intervals in the longitudinal direction of the main beam 4. It is a ladder-shaped frame structure. Specifically, the main girder 4 is a long member having a substantially U-shaped cross section in which bent walls 4b that are bent inward from both ends in the width direction of the main wall 4a are extended. In addition, in the central portion of the main wall 4a in the width direction, a concave strip 6 that is recessed inwardly is formed over the longitudinal direction. The child girder 5 has a U-shaped long section with a cross-sectional lip in which side walls 5b are respectively raised from both ends in the width direction of the bottom wall 5a, and a lip piece 5c is extended from the upper end of the side wall 5b toward the opposite side wall 5b. It is a member. In addition, the protruding piece 7 protrudes toward the bottom wall 5a at the protruding end of each lip piece 5c. Then, the bottom wall 5a of the child beam 5 is placed on the inner surface of one bent wall 4b of the parent beam 4, and the longitudinal direction and the width direction of the parent beam 4 and the longitudinal direction of the child beam 5 have a substantially perpendicular relationship. In this way, a cable rack 1 is formed by installing a child beam 5 between a pair of parent beams 4. The cable rack 1 having the above-described configuration is used by wiring a cable K such as a power cable in a wiring space S surrounded by a pair of opposed parent beams 4 and a plurality of child beams 5. Note that the cable rack 1 is provided with a coating that provides weather resistance and the like on the surface thereof. Unlike the base metal of the cable rack 1, this coating does not have conductivity.
[0022]
The cover 2 is mainly composed of a plate surface portion 2a in which the width dimension is substantially matched to the size between the main walls 4a of the pair of main beams 4 of the cable rack 1, and the plate surface portion is formed on the outer surface of the bent wall 4b of the main beam 4. A bent portion 2b that extends along the outer surface of the main wall 4a of the main girder 4 when the layers 2a are stacked is extended from the end portion in the width direction of the plate surface portion 2a. The cover 2 is appropriately attached to the cable rack 1 depending on the use state of the cable rack 1 laying place and the like. Like the cable rack 1, the cover 2 is provided with a coating for weather resistance and the like on its surface. . Unlike the base metal of the cover 2, this coating does not have conductivity.
[0023]
Note that the cover mounting device 3 of the embodiments of the present invention described below includes, as common matters, a locking portion 8 that is locked to the cable rack 1, a mounting portion 9 that mounts the cover 2, A connecting portion 10, which is an integrated member that connects the stop portion 8 and the attachment portion 9, a rack facing portion 11 that faces a part of the cable rack 1, and a cover facing portion 12 that faces a part of the cover 2. It has and is configured.
[0024]
1 to 9 show examples of embodiments of the present invention. As shown in FIGS. 2 to 4, the cover mounting device 3 of the present example is a metal member having a U-shaped plate shape in a side view in which a locking portion 8 and an attachment portion 9 that are located opposite to each other are connected by a connecting portion 10. It is. Here, the direction surrounded by the locking portion 8, the attachment portion 9, and the connecting portion 10 will be referred to as “inward”. Specifically, the cover mounting device 3 of the present example is configured such that one end and the other end in the longitudinal direction of the plate material 14 that is the material are bent to form the attachment portion 9 and the locking portion 8. A portion of the plate member 14 between the ends is configured as a connecting portion 10. Thus, since the cover mounting apparatus 3 of this example was integrally formed with the one board | plate material 14, the number of structural members is suppressed, a structure can be simplified and can be formed easily. It is rigid and has high rigidity and strength. Further, the cover mounting device 3 of the present example forms the flange edge 13 by bending the end portion in the width direction of the plate member 14 extending in the longitudinal direction of the plate member 14 inward. Thus, the cover mounting device 3 has a U-shaped cross section in which the flange edges 13 are respectively extended inward from both ends in the width direction of the plate surface portion 14a of the plate material 14 constituting the outer surface. The rigidity of the cover mounting device 3 is improved by the flange edge 13 over the entirety. Further, the locking portion 8 of this example is a portion that is locked to the main beam 4 of the cable rack 1, and protrudes inward from the flange edge 13 positioned at the locking portion 8, and at the protruding tip, the connecting portion 10. A claw-shaped claw portion 15 that is bent to the side is provided. Further, the connecting portion 10 is formed with a step portion 16 for positioning a portion continuous to the attachment portion 9 of the connecting portion 10 to the outside as compared to a portion continuing to the locking portion 8 of the connecting portion 10. In this step portion 16, the rigidity of the connecting portion 10 is improved. When the cover mounting device 3 is attached to the cable rack 1, the connecting portion 10 is brought close to the outer surface of the main wall 4 a of the main beam 4 of the cable rack 1. (FIG. 8) has the effect. And if the connection part 10 adjoins to the outer surface of the main wall 4a of the main girder 4, the outward protrusion part from the main girder 4 of a cover attachment apparatus can be reduced, and it can contribute to the improvement of aesthetics and safety | security. . It should be noted that the step portion 16 is appropriately provided in relation to the shapes of the connecting portion 10 and the main beam 4 and it goes without saying that the provision of the step portion 16 does not hinder the basic performance of the cover mounting device. Yes.
[0025]
Further, the surface of the cover mounting device 3 of the present example is coated with a coating that provides weather resistance and the like, similar to the cable rack 1 and the cover 2. Unlike the base metal of the cover mounting device 3, this coating also has no electrical conductivity. When the cover mounting device 3 is attached to the cable rack 1, the inner surface of the plate surface portion 14 a in the connecting portion 10 faces the outer surface of the main beam 4, and the inner surface of the plate surface portion 14 a in the attachment portion 9 is covered with the cover 2. The plate surface portion 14 a in the connecting portion 10 constitutes the rack facing portion 11, and the plate surface portion 14 a in the attachment portion 9 constitutes the cover facing portion 12. The rack facing portion 11 and the cover facing portion 12 are respectively bored with screw through holes 17 penetrating inward and outward and having internal threads engraved on the inner surface of the hole, so that a male screw member 18 such as a bolt can be screwed. The screw through-hole 17 of the rack facing portion 11 constitutes a first screw through-hole 17a into which the first male screw member 18a is screwed, and the screw male through-hole 17 of the cover facing portion 12 is screwed into the second male screw member 18b. The second screw through-hole 17b is configured.
[0026]
Below, the construction example which attaches the cover 2 to the cable rack 1 using this cover attachment apparatus 3 is shown. Here, a cable rack 1 is formed by laying a child girder 5 between one end portion in the width direction of the parent girder 4 arranged side by side (hereinafter, one bent wall 4b). Between the other ends (hereinafter referred to as the other bent wall 4b) in the width direction of the main girder 4 which is disposed substantially horizontally so that the girder 5 is positioned below and is not installed on the child girder 5 from above. A case where the cover 2 is mounted so as to be bridged will be described.
[0027]
First, as shown in FIG. 5, the cover 2 is placed between the outer surfaces of the other bent walls 4 b of the pair of parent girders 4 so as to be bridged, and the inner surface of the one bent wall 4 b of the parent girders 4. The cover attaching device 3 is hooked on the claw portion 15 and rotated so that the entire cover attaching device 3 is brought close to the main wall 4a of the main girder 4 from the outside thereof (arrow A). Then, as shown in FIG. 6, the attachment portion 9 of the rotated cover attachment device 3 is positioned so as to be close to the other bent wall 4 b so as to cover the outer surface of the cover 2 from the outside. The cover attaching device 3 is disposed along the cable rack 1 in such a manner that the pair of bent walls 4b of the parent beam 4 are gripped by the stop portion 8 and the attachment portion 9. Then, as shown in FIG. 7, the first male screw member 18 a is inserted into the first screw through-hole 17 a and screwed toward the main beam 4, and the leading end of the first male screw member 18 a is formed on the main wall 4 a of the main beam 4. Tighten it so that it is pressed against the outer surface. As described above, the cover attaching device 3 is mechanically attached to the cable rack 1 with the cover 2 interposed therebetween. In this example, thereafter, as shown in FIG. 8, the second male screw member 18 b is inserted into the second screw through-hole 17 b and screwed toward the cover 2, and the tip of the second male screw member 18 b is moved to the outer surface of the cover 2. It is tightened so that it is pressed against. According to the tightening of the second male screw member 18b, in addition to the electrical connection between the cover 2 and the cover mounting device 3, which will be described later, the cover 2 is brought into strong contact with the cable rack 1, and the cover 2 is attached to the cable rack 1. The mechanical connection is strengthened. 1 and 9 show a state in which the cover 2 is mechanically attached to the cable rack 1 via the cover attaching device 3.
[0028]
Specifically, according to the tightening of each male screw member 18, the cover mounting device 3 is tightened by sandwiching one bent wall 4 b of the main beam 4 between the tip of the first male screw member 18 a and the claw portion 15. The cover 2 and the main wall 4a of the main girder 4 are sandwiched and tightened between the tip of the second male screw member 18b and the locking portion 8, and the cover mounting device 3 thus holds the cable with the cover 2 in between. The cover 1 is firmly fixed to the rack 1 and the cover 2 is firmly fixed to the cable rack 1.
[0029]
More specifically, when the first male screw member 18a is passed through the first screw through hole 17a and is tightened toward the main beam 4 of the cable rack 1, the tip of the first male screw member 18a breaks the coating of the cable rack 1. To contact the bare metal of the cable rack 1. Since the first male screw member 18a is in contact with the bare metal of the cover mounting device 3 on the inner surface of the first screw through hole 17a, the cable rack 1 and the cover mounting device 3 are electrically connected by the first male screw member 18a. Is done. Similarly, when the second male screw member 18b is tightened toward the cover 2 through the second screw through-hole 17b, the tip of the second male screw member 18b breaks the cover 2 and the cover 2 is grounded. Contact gold. Since the second male screw member 18b is also in contact with the bare metal of the cover mounting device 3 on the inner surface of the second screw through hole 17b, the cover 2 and the cover mounting device 3 are electrically connected by the second male screw member 18b. Is done. That is, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3. Even if the inner surface of each screw through-hole 17 is coated with the timing of drilling and surface treatment of each screw through-hole 17, each male screw member 18 is engraved on the inner surface of each screw through-hole 17. Due to rubbing when screwed into the provided female screw, the coating on the inner surface of the hole is peeled off, and the bare metal of the cover mounting device 3 and each male screw member 18 come into contact with each other, and the electrical connection between each male screw member 18 and the cover mounting device 3 Needless to say, the connection is secured.
[0030]
As described above, when the cover 2 is attached to the cable rack 1 using the cover attaching device 3 of this example, the cover 2 and the cover 2 are simultaneously connected to the cable rack 1 via the cover attaching device 3. Electrical connection with the cable rack 1 is performed. That is, the mechanical connection and the electrical connection between the cover 2 and the cable rack 1 are performed only by using the cover mounting device 3 as one member, and the electrical connection is made with a simple structure. The cover 2 is attached to the cable rack 1.
[0031]
Note that the cover mounting device 3 of this example is particularly suitable for use when the cover 2 is mounted on the cable rack 1 laid substantially horizontally as described above, but is laid substantially horizontally. Needless to say, it can also be used when the cover 2 is attached to the cable rack 1 from below (see FIG. 14). Further, in the case of this example, when the first male screw member 18a and the second male screw member 18b are compared, the role of screwing the second male screw member 18b is accompanied by the pressing of the cover 2 to the cable rack 1, so that it is mechanical. The color of the connection is strong, and the role of screwing the first male screw member 18a is the color of the electrical connection between the cover mounting device 3 and the cable rack 1. Therefore, the screwing operation of the first male screw member 18a can be omitted depending on the situation, for example, when the electrical connection between the cover mounting device 3 and the cable rack 1 is separately performed by an earth bond or the like. Thus, the cover attaching device 3 can be used only for mechanically attaching the cover 2 to the cable rack 1 depending on the situation, and has an advantage that it can cope with the construction according to the situation.
[0032]
As described above, in the mounting structure of the cover 2 to the cable rack 1 using the cover mounting device 3 of this example, the electrical connection and mechanical connection of the cover 2 to the cable rack 1 are the same member (cover mounting device). 3) and has the convenience of allowing only the mechanical connection of the cover 2 to the cable rack 1 according to the situation. Moreover, those connections can be made with a simple configuration and a simple operation.
[0033]
Hereinafter, other examples of the embodiment of the present invention will be enumerated, but the same parts as those in the previous embodiment will be given the same reference numerals and the description thereof will be omitted, and different parts will be described.
[0034]
10 to 14 show other examples of the embodiment of the present invention. The cover mounting device 3 of this example is configured by integrating a pair of L-shaped metal fittings 20 and a bar material 21 (FIG. 14). As shown in FIGS. 10 to 12, the L-shaped metal fitting 20 is bent so that an appropriate position in the longitudinal direction of the plate 14 that is a material is substantially orthogonal, and projects a horizontal portion 20 b substantially horizontally from one end of a vertically arranged vertical portion 20 a. It is the metal member formed in the side view L-shape formed. When the direction surrounded by the vertical portion 20a and the horizontal portion 20b is inward, the L-shaped metal fitting 20 forms the outer surface of the plate surface portion 14a of the plate material 14 which is the material of the L-shaped metal fitting 20, and the plate surface portion 14a It has a U-shaped cross section with flange edges 13 extending inward from both ends in the width direction. The flange edge 13 improves the rigidity and strength of the L-shaped metal fitting 20. On the other hand, the bar material 21 is a long material having substantially the same length as the pair of parent beams 4 as shown in FIG. This bar material 21 has a U-shaped cross section with a lip in its entirety, and specifically, the side wall 21b is erected from both ends in the width direction of the bottom wall 21a and the tip of the side wall 21b. The lip piece 21c is projected inward from the inside. In the bar material 21, the side wall portion 21b functions to improve the rigidity strength.
[0035]
The horizontal portion 20b of the L-shaped metal fitting 20 is formed with a claw-shaped claw portion 22 that protrudes inward from the flange edge 13 and whose protruding tip is bent toward the vertical portion 20a. The claw portion 22 is inserted into and engaged with an engagement hole 23 formed in the bottom wall portion 21a at the end portion of the bar member 21 in the longitudinal direction. By integrating the members 20 and 21 in such a manner that the bar material 21 is suspended between the pair of L-shaped metal fittings 20 via the engaging portion 24 formed by the claw portion 22 and the engaging hole 23, An example cover mounting device 3 is formed (FIG. 14). The integrated L-shaped metal fitting 20 and the bar material 21 are positioned so that the plate surface portion 14a of the horizontal portion 20b of the L-shaped metal fitting 20 and the bottom wall portion 21a of the bar material 21 face each other. The second screw through hole 17b drilled in the plate surface portion 14a in the horizontal portion 20b and the bar material through hole 25 drilled in the bottom wall portion 21a of the bar material 21 communicate with each other. A first screw through hole 17a is formed in the plate surface portion 14a of the vertical portion 20a of the L-shaped metal fitting 20.
[0036]
Below, the construction example which attaches the cover 2 to the cable rack 1 using this cover attachment apparatus 3 is shown. Here, a cable rack 1 is formed by laying a child girder 5 between one end portion in the width direction of the parent girder 4 arranged side by side (hereinafter, one bent wall 4b). The cover 2 is arranged substantially horizontally so that the girder 5 is positioned below, and covers from the lower side between one end portion (one bent wall 4b) in the width direction of the main girder 4 on which the child girder 5 is installed. The case where it is attached so as to be bridged will be described.
[0037]
First, the L-shaped metal fittings 20 are attached to and integrated with the end portions of the bar member 21 in the longitudinal direction via the engaging portions 24 to form the cover attaching device 3. Then, the cover 2 is arranged so as to be covered from below between one bent wall 4 b of the pair of parent beams 4 of the cable rack 1, and this cover 2 is placed on the outer surface of the lip piece 21 c of the bar member 21. In this state, the vertical portion 20a of the L-shaped metal fitting 20 is arranged along the outer surface of the main wall 4a of the main beam 4. 13 and 14, the first male screw member 18 a is screwed into the first screw through hole 17 a toward the outer surface of the main wall 4 a of the main beam 4, and the tip of the first male screw member 18 a is moved to the main beam 4. The cover mounting device 3 is attached to the cable rack 1 while the cover 2 is sandwiched between the bar material 21 and the bent wall 4b of the parent beam 4 by being tightened in a state where it is hooked on the recess 6 in the main wall 4a. Mounted mechanically. That is, the cover 2 is firmly attached to the cable rack 1 via the cover attaching device 3. In this example, for electrical connection between the cover mounting device 3 and the cover 2 described later, the second male screw member 18b is screwed into the second screw through-hole 17b toward the cover 2, and the second male screw member 18b. It is tightened so that the tip of is pressed against the outer surface of the cover 2. Of course, when the second male screw member 18b is tightened toward the cover 2, the cover 2 can be strongly abutted toward the cable rack 1, so that the mechanical connection of the cover 2 to the cable rack 1 is enhanced. Can be made. Further, the above-described work procedure is an example, and it goes without saying that this procedure can be appropriately changed.
[0038]
Here, in the cover mounting device 3 of the present example, the vertical portion 20a of the L-shaped metal fitting 20 facing the outer surface of the main wall 4a of the main beam 4 constitutes the rack facing portion 11, and the outer surface of the cover 2 The horizontal portion 20b of the L-shaped metal fitting 20 facing the cover constitutes the cover facing portion 12. Further, the first male screw member 18 a that is screwed into the first screw through hole 17 a and whose front end is locked to the concave portion 6 of the main beam 4 has a locking portion 8 that is locked to the main beam 4 of the cable rack 1. The horizontal portion 20 b of the L-shaped metal fitting 20 that is configured and attaches the cover 2 via the bar material 21 constitutes the attachment portion 9. In addition, the connecting portion 10 that connects the locking portion 8 and the attachment portion 9 is constituted by the entire casing (vertical portion 20a, horizontal portion 20b) of the L-shaped metal fitting 20.
[0039]
As described above, when the cover 2 is attached to the cable rack 1 using the cover attaching device 3 of the present example, the first male screw member 18a and the second male screw member 18b are tightened as in the previous embodiment. In addition, the cover of the cable rack 1 and the cover 2 with which the tips of the first male screw member 18 a and the second male screw member 18 b abut are peeled off and brought into contact with the bare metal of the members 1, 2, and the cover 2 through the cover mounting device 3. At the same time as the mechanical connection between the cover 2 and the cable rack 1, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3. Since the mechanical connection and the electrical connection are performed only by using the cover mounting device 3 which is one member, the machine of the cover 2 to the cable rack 1 with the electrical connection with a simple structure. Connection is possible.
[0040]
More specifically, when comparing the first male screw member 18a and the second male screw member 18b, the role of the first male screw member 18a is to insert the cable rack 1 from both widths so that the cover mounting device 3 is firmly attached to the cable rack 1. On the other hand, the second male screw member 18b has a strong tint of electrical connection between the cover 2 and the cover mounting device 3. Therefore, the screwing operation of the second male screw member 18b can be omitted depending on the situation, for example, in the case where the electrical connection between the cover mounting device 3 and the cover 2 is separately performed by an earth bond or the like. As described above, the cover mounting device 3 can be used only for mechanically mounting the cover mounting device 3 to the cable rack 1 via the cover 2 depending on the situation, and can correspond to the construction according to the situation. There are also advantages.
[0041]
The cover mounting device 3 of this example is particularly suitable for use when mounting the cover 2 from the lower side to the cable rack 1 laid substantially horizontally as described above, but is laid substantially horizontally. Needless to say, it can also be used when the cable rack 1 is attached from above (see FIG. 1).
[0042]
As described above, in the mounting structure of the cover 2 to the cable rack 1 using the cover mounting device 3 of this example, the electrical connection and mechanical connection of the cover 2 to the cable rack 1 are the same member (cover mounting device). 3) and has the convenience of allowing only the mechanical connection of the cover 2 to the cable rack 1 according to the situation. Moreover, those connections can be made with a simple configuration and a simple operation.
[0043]
15 to 23 show still another example of the embodiment of the present invention. As shown in FIG. 15, the cover mounting device 3 according to the present example is a metal member having a U-shaped plate in a side view in which a locking portion 8 and an attachment portion 9 that are positioned to face each other are connected by a connecting portion 10. Specifically, the cover mounting device 3 of the present example is formed by bending one end and the other end in the longitudinal direction of the plate material 14 as a material to form the attachment portion 9 and the locking portion 8, A portion of the plate member 14 between the other end is formed to be the connecting portion 10. As described above, the cover mounting device 3 of the present example is formed of the single plate member 14, so that the number of constituent members can be suppressed, the configuration can be simplified, and the configuration can be easily formed. It has a high rigidity and strength. Here, the locking portion 8 has a substantially rectangular outer shape in plan view, and its short side length a is formed shorter than the opening width H between the pair of lip pieces 5c of the child beam 5, The long side length b is longer than the opening width H between the pair of lip pieces 5c. The plate-like connecting portion 10 is erected along the long edge of the locking portion 8 to reach the attachment portion 9, and the cover 2 is attached to the attachment portion 9 as will be described later. When worn, the weight of the cover 2 is supported. In the connecting portion 10, a plurality of reinforcing ribs 26 are provided side by side that extend in the length direction to form a concavo-convex cross section in the connecting portion 10 in order to increase the rigidity strength against the dead weight of the cover 2. In addition, the length dimension from the latching | locking part 8 to the attachment part 9 in this connection part 10 is set to the substantially equivalent length with the width direction dimension of the substantially parent girder 4. FIG.
[0044]
Here, in the cover mounting device 3 of this example, the locking portion 8 locked in the child beam 5 constitutes the rack facing portion 11, and the attachment portion 9 facing the cover 2 is the cover. The facing portion 12 is configured. A first screw through hole 17a is formed in the locking portion 8 that is the rack facing portion 11, and a second screw through hole 17b is formed in the attachment portion 9 that is the cover facing portion 12. The second male screw member 18b to be inserted into the second screw through hole 17b of this example has a blade portion 28 that breaks the coating of the cover 2 and contacts the bare metal on the seating surface of the head 27 shown in FIG. Is used.
[0045]
Below, the construction example which attaches the cover 2 to the cable rack 1 using this cover attachment apparatus 3 is shown. Here, a cable rack 1 is formed by laying a child girder 5 between one end portion in the width direction (hereinafter referred to as one bent wall 4b) of the parent girder 4 arranged side by side, and the cable rack 1 is substantially omitted. Between the other ends in the width direction of the main beam 4 (hereinafter referred to as the other bent wall 4b), which is arranged vertically, in which the child beam 5 is not installed and is positioned in the opening direction between the lip pieces 5c of the child beam 5. A case where the cover 2 is mounted so as to be bridged from the side will be described.
[0046]
First, as shown in FIG. 17, the locking portion 8 of the cover mounting device 3 is inserted into the child beam 5 from the opening between the lip pieces 5 c of the child beam 5 of the cable rack 1. At this time, the short side direction of the locking portion 8 of the cover mounting device 3 is aligned with the opening width direction between the lip pieces 5c of the child beam 5. Then, as shown in FIG. 18, the locking portion 8 inserted into the child girder 5 is horizontally rotated on the spot (arrow B), and both end portions of the long side of the locking portion 8 are within the pair of lip pieces 5c. I'm going to get it. This state is a temporary locking state in which both ends of the long side of the locking portion 8 are held between the inner surface of the bottom wall 5a of the child beam 5 and the protruding strip 7 of the lip piece 5c. The operation of locking the locking portion 8 in the child beam 5 in this way is to rotate the locking portion 8 inserted into the child beam 5 on the spot horizontally as described above, with a simple configuration. It can be performed simply and smoothly, and workability is improved. Then, as shown in FIG. 19, the first male screw member 18 a is inserted into the first screw through hole 17 a and is screwed toward the child girder 5, and the tip of the first male screw member 18 a is moved to the bottom wall 5 a of the child girder 5. Press against the inner surface and tighten. When the first male screw member 18a is tightened, as shown in FIG. 20, the locking portion 8 temporarily locked to the child girder 5 is lifted, and both end portions of the long side of the locking portion 8 are lip pieces 5c. The locking portion 8 is firmly locked and fixed to the sub beam 5 by being pressed against the inner surface of the protruding strip piece 7. Then, as shown in FIGS. 21 to 23, the cover 2 is connected to the second screw through hole 17b so that the through hole 29 drilled in the plate surface portion 2a of the cover 2 communicates with the other bent wall of the pair of main girders 4. 4b, the second male screw member 18b is passed from the outside of the cover 2 through the through hole 29, screwed into the second screw through hole 17b, and tightened, whereby the cover 2 is attached to the cover mounting device 3. Fix to the landing 9. Thereby, the cover 2 is attached to the cable rack 1 via the cover attaching device 3. Here, in a state in which the cover 2 is attached to the cable rack 1, the plate-like connecting portion 10 of the cover attaching device 3 has the width direction of the connecting portion 10 in the longitudinal direction of the main beam 4 that is the weight direction of the cover 2. The connecting portion 10 effectively receives the weight of the cover 2. That is, the connecting portion 10 is set in a direction in which the plate surface does not face the direction of the weight of the cover 2 (vertical direction), and the deformation of the connecting portion 10 due to the moment due to the weight of the cover 2 is prevented. The support strength is improved.
[0047]
Further, when the first male screw member 18a is fastened to the first screw through hole 17a, the tip of the first male screw member 18a breaks the coating of the cable rack 1 and contacts the bare metal of the cable rack 1, and the first male screw The cable rack 1 and the cover mounting device 3 are electrically connected via the member 18a. On the other hand, when the second male screw member 18b is fastened to the second screw through-hole 17b, the blade portion 28 provided on the head portion 27 of the second male screw member 18b breaks the coating of the cover 2 and turns into the metal of the cover 2. The cover 2 and the cover mounting device 3 are electrically connected via the second male screw member 18b. Thus, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3.
[0048]
As described above, the work of attaching the cover 2 to the cable rack 1 using the cover attaching device 3 of this example is also performed between the cover 2 and the cable rack 1 via the cover attaching device 3 as in the example of the previous embodiment. Simultaneously with the mechanical connection, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3. Therefore, the mechanical connection and electrical connection between the cover 2 and the cable rack 1 are performed only by using the one cover mounting device 3, and the cover 2 is connected to the cable rack 1 with the electrical connection with a simple structure. It is possible to make a mechanical connection. Furthermore, in the structure for mounting the cover 2 to the cable rack 1 using the cover mounting device 3 of this example, the electrical connection and mechanical connection of the cover 2 to the cable rack 1 are the same member (cover mounting device). 3), and the work for making the electrical connection and the mechanical connection is a fastening work of the male screw members 18a and 18b, and can be performed with a simple configuration and a simple work. There are also advantages.
[0049]
Further, in this example, the locking portion 8 is locked in the child beam 5 and the cover mounting device 3 is fixed to the cable rack 1, and the locking portion 8 is connected to the locking portion 8 via the connecting portion 10 that is an integral object. Attaching the cover 2 to the cable rack 1 by attaching the cover 2 to the connected attachment portion 9 and attaching the cover 2 to the cable rack 1 can be performed in stages, and is heavy. Construction that simplifies construction, such as eliminating work that is difficult to be performed by a single contractor, such as supporting the cover 2 and the cover mounting device 3 at the same time, is achieved. This simplification of construction is particularly the case where the cover 2 is attached to the cable rack 1 arranged substantially vertically, or the cover 2 is attached along the cable rack 1 laid in an inclined state. In the case where there is a possibility that the cover 2 arranged along the cable rack 1 slides on the cable rack 1 with its own weight, the effect is great. Thus, the cover mounting device 3 of the present example is arranged along the cable rack 1 when the cover 2 is mounted along the cable rack 1 laid in a substantially vertical and inclined state as described above. It is suitable for use when the cover 2 may slide with respect to the cable rack 1 with its own weight. However, it goes without saying that it can also be used when the cover 2 is attached to the cable rack 1 laid substantially horizontally (see FIG. 1).
[0050]
24 to 32 show still another example of the embodiment of the present invention. The cover mounting apparatus 3 of this example is configured by integrating a parent metal 30 shown in FIG. 24 and a child metal 31 shown in FIG. 25 (FIG. 26). Specifically, the parent metal 30 is formed with a recessed portion 14b that is recessed in the width direction in the center region in the longitudinal direction of the plate member 14 that is the material of the parent metal 30, and sandwiches the recessed portion 14b therebetween. Is a U-shaped metal member with a flange in a side view in which both end portions in the longitudinal direction of the plate material 14 located on the substantially same plane are disposed. The insertion part 32 is comprised by the edge part, and the connection part 10 is comprised by the said recessed part 14b, respectively. Here, the attachment part 9 constitutes a cover facing part 12 and a second screw through hole 17b is perforated. Further, the insertion portion 32 is a portion integrated with the metal shell 31, and constitutes a locking portion 8 that locks with the cable rack 1 together with the integrated metal fitting 31, and the inner surface of the bottom wall 5 a of the child girder 5. The rack facing portion 11 is opposed to the first screw through hole 17a. Further, the insertion portion 32 is formed with a stopper 33 protruding outward in the width direction of the parent metal 30. In addition, a locking piece 34 that protrudes into the recessed space s of the recessed portion 14 b is formed at the connection portion of the connecting portion 10 to the insertion portion 32.
[0051]
On the other hand, the slave metal 31 is a member that is integrated with the insertion part 32 of the parent metal 30 to constitute the locking part 8, and has a sliding part 35 that slidably inserts the insertion part 32 of the parent metal 30. is doing. Specifically, the child metal fitting 31 is substantially inverted U-shaped when viewed from the front side, in which both ends in the width direction of the plate surface portion 14a of the plate member 14 that is the material of the metal fitting 31 are bent downward to form a support piece 37 that is L-shaped in side view. Metal member. The sliding portion 35 is configured by a space surrounded by the plate surface portion 14 a and the pair of support pieces 37. In addition, a slit 36 is cut from one end portion of the plate member 14 in the length direction at the center of the plate surface portion 14a, and the other end portion of the plate member 14 in the length direction where the slit 36 is not cut is a child. A hooking portion 38 that locks in the lip piece 5c of the beam 5 is formed.
[0052]
As shown in FIG. 26, the base metal 30 and the base metal 31 are integrated by slidingly inserting the insertion portion 32 of the base metal 30 into the sliding portion 35 of the base metal 31 and inserting the stopper 33 of the base metal 30 into the base metal 31. The insertion portion 32 is sandwiched between the plate surface portion 14 a of the metal shell 31 and the support piece 37. At this time, the slit 36 and the first screw through hole 17a are in communication with each other, and the stopper 33 and the support piece 37 at the collision position prevent the insertion portion 32 from coming off from the sliding portion 35. . Here, the cover mounting device 3 comprising the integrated parent metal 30 and child metal 31 is fixed to the cable rack 1 by engaging the engaging part 8 in the child beam 5 as will be described later.
[0053]
Below, the construction example which attaches the cover 2 to the cable rack 1 using this cover attachment apparatus 3 is shown. Here, a cable rack 1 is formed by laying a child girder 5 between one end portion in the width direction (hereinafter referred to as one bent wall 4b) of the parent girder 4 arranged side by side, and the cable rack 1 is substantially omitted. A case in which the cover 2 is installed so as to be bridged from the side between the bent walls 4b of the main beam 4 will be described.
[0054]
First, as shown in FIG. 27, the cover 2 is disposed between one bent wall 4 b of the parent beam 4 of the cable rack 1. The cover 2 has through holes 29 at appropriate positions on the plate surface portion 2a. Then, as shown in FIG. 28, the locking piece 34 of the parent metal 30 is connected to the child girder 5 so that the second screw through hole 17 b of the attachment portion 9 of the parent metal 30 is in communication with the through hole 29 of the cover 2. The lip piece 5 c is hooked on the protrusion piece 7, and the insertion portion 32 of the parent metal fitting 30 is arranged inside the child beam 5. At this time, the attachment portion 9 of the parent metal 30 is positioned on the longitudinal direction side of the parent beam 4 with respect to the insertion portion 32, and the connecting portion 10 that connects the insertion portion 32 and the attachment portion 9 is the child beam. 5 is disposed so as to straddle the side wall 5b. Then, the insertion portion 32 of the parent metal 30 is inserted into the sliding portion 35 of the child metal 31 to integrate the parent metal 30 and the child metal 31 to form the cover mounting device 3. Then, the first male screw member 18a is lightly screwed into the slit 36 and the first screw through hole 17a in communication with each other from the top of the metal fitting 31 disposed on the insertion portion 32 toward the bottom wall 5a of the child girder 5. . At this time, the tip of the first male screw member 18a presses the inner surface of the bottom wall 5a of the child girder 5 to lift the cover mounting device 3, and the locking piece 34 of the parent metal 30 is pressed against the inner surface of the lip piece 5c of the child girder 5. Then, the locking portion 8 is lightly locked inward of the child beam 5 and the cover mounting device 3 is temporarily fixed to the cable rack 1. Then, as shown in FIG. 29, the cover 2 and the cover mounting device 3 are fixed by screwing the second male screw member 18b into the through hole 29 and the second screw through hole 17b. As in the example of the previous embodiment, the second male screw member 18b is used in which the blade portion 28 is formed on the seating surface of the head 27 to break the coating of the cover 2 and contact the bare metal (see FIG. 16). When the second male screw member 18b is screwed into the second screw through hole 17b, the blade portion 28 of the head portion 27 of the second male screw member 18b scrapes the coating of the cover 2 and comes into contact with the bare metal of the cover 2. The cover 2 and the cover mounting device 3 are mechanically and electrically connected via the second male screw member 18b. Then, as shown in FIG. 30, in order to slide the insertion part 32 into the sliding part 35, the child metal 31 is slid (arrow C), and the inside of the lip piece 5c on the side where the engaging piece 34 of the parent metal 30 is not engaged The hooking portion 38 of the child metal fitting 31 is inserted into. Then, by tightening the first male screw member 18 a screwed into the slit 36 and the first screw through hole 17 a toward the inner surface of the bottom wall 5 a of the child girder 5, the locking portion 8 is fixed to the inner girder 5. Then, the cover mounting device 3 is fixed to the cable rack 1. In this state, as shown in FIGS. 31 and 32, the cover mounting device 3 is lifted away from the inner surface of the bottom wall 5 a of the child girder 5 in accordance with the tightening of the first male screw member 18 a, and the locking piece 34 of the parent metal member 30. Since the hooking portion 38 of the child metal fitting 31 is strongly pressed against the inner surfaces of the lip pieces 5c of the child beam 5, the locking portion 8 is strongly locked inward of the child beam 5 and the cable of the cover mounting device 3 is used. Strong fixation to the rack 1 is ensured. As described above, the cover 2 is attached to the cable rack 1 via the cover attachment device 3. The construction procedure described above is an example and can be changed as appropriate. For example, after the insertion portion 32 is inserted into the sliding portion 35 to form the cover attachment device 3, the locking portion 8 of the cover attachment device 3 is changed. The procedure of arranging and fixing in the child beam 5 may be included.
[0055]
Here, when the first male screw member 18a is fastened to the first screw through hole 17a, the tip of the first male screw member 18a breaks the coating of the cable rack 1 and comes into contact with the bare metal of the cable rack 1, so that the first The cable rack 1 and the cover mounting device 3 are electrically connected via the male screw member 18a. On the other hand, when the second male screw member 18b is fastened to the second screw through-hole 17b, the blade portion 28 provided on the head portion 27 of the second male screw member 18b breaks the coating of the cover 2 and turns into the metal of the cover 2. The cover 2 and the cover mounting device 3 are electrically connected via the second male screw member 18b. Thus, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3.
[0056]
As described above, when the cover 2 is attached to the cable rack 1 using the cover attaching device 3 of this example, the cover 2 and the cable rack 1 via the cover attaching device 3 are connected to the cable rack 1 as in the example of the previous embodiment. At the same time as the mechanical connection, the cover 2 and the cable rack 1 are electrically connected via the cover mounting device 3. Therefore, the mechanical connection and electrical connection between the cover 2 and the cable rack 1 are performed only by using the single cover mounting device 3, and the cover 2 is connected to the cable rack 1 with the electrical connection with a simple structure. The mechanical connection is possible. Furthermore, in the structure for mounting the cover 2 to the cable rack 1 using the cover mounting device 3 of this example, the electrical connection and mechanical connection of the cover 2 to the cable rack 1 are the same member (cover mounting device). 3), and the work for making the electrical connection and the mechanical connection is a fastening work of the male screw members 18a and 18b, and can be performed with a simple configuration and a simple work. There are also advantages.
[0057]
15 to 23, the cover 2 is attached to the attaching portion 9 of the cover attaching device 3 in which the engaging portion 8 is engaged in the child beam 5, and the cover 2 is attached to the cable rack 1. As described above, the attachment work of the cover 2 to the cable rack 1 can be performed in stages, so that the cover 2 and the cover attachment device 3 are simultaneously maintained at predetermined positions with respect to the cable rack 1. Work that is difficult for a single builder, such as connecting members, is eliminated, thereby facilitating the construction. Thus, as described above, when the cover 2 is attached along the cable rack 1 laid substantially vertically, or when the cover 2 is attached along the cable rack 1 laid in an inclined state, that is, the cable. Suitable for use when the cover 2 arranged along the rack 1 may slide with respect to the cable rack 1 by its own weight, but covers the cable rack 1 laid substantially horizontally. Needless to say, the cover 2 can also be used when the cover 2 is attached to the cable rack 1 (see FIG. 14).
[0058]
Further, although not shown, the cover mounting device 3 in this example is configured by using only the parent metal 30 in which the metal fitting 31 is eliminated and the hooking portion 38 is provided at the protruding tip of the insertion portion 32 that is bent and protruded from the connecting portion 10. Even in the case of the integrally formed cover attaching device 3, the parent metal fitting 30 can be locked in the child spar 5 by engaging the hook portion 38 and the locking piece 34 with both the lip pieces 5 c of the child spar 5. If so, it can be used instead.
[0059]
Further, the present invention is not limited to this example but can be applied to the examples of FIGS. 10 to 14. In this case, the cover 2 is attached to the cable rack 1 so as to follow the child girder 5. When the outer surface of the bottom wall 5a is placed and fixed on the inner surface of the bent wall 4b of the main beam 4, the height between the outer surface of the bottom wall 5a of the child beam 5 and the outer surface of the bent wall 4b of the parent beam 4 is increased. Strictly speaking, a level difference corresponding to the thickness of the bent wall 4b of the main girder 4 is formed at the height level, but the cover 2 constituted only by the flat plate-like plate surface portion 2a is arranged so as to fit within the level difference. In addition, a gap is formed between the outer surface of the bottom wall 5 a of the laminated girder 5 and the inner surface of the bent wall 4 b of the parent girder 4 so that the child girder 5 is installed between the parent girder 4. In this case, the cover 2 is arranged in such a manner that the end in the width direction of the cover 2 constituted only by the flat plate-like plate surface portion 2a is sandwiched between the gaps. Good of course.
[0060]
【The invention's effect】
  As described above, in the first aspect of the present invention,TheSince the mechanical and electrical connection between the cable rack and the cover can be performed by a single cover mounting device, the cover can be attached to the cable rack with an electrical connection with a simple structure. AndThe Moreover, it can be set as the suitable cover attachment apparatus used when attaching a cover from the top of a pair of main beam of the cable rack arrange | positioned substantially horizontally.
[0061]
  In the invention of claim 2,Since the mechanical connection and electrical connection between the cable rack and the cover can be performed by a single cover mounting device, the cover can be attached to the cable rack with an electrical connection with a simple structure. It becomes possible. Moreover, it can be set as the suitable cover attachment apparatus used when attaching a cover from the bottom of a pair of main beam of the cable rack arrange | positioned substantially horizontally.
[0062]
  In the invention of claim 3, in addition to the effect of claim 1 or 2,The rigidity strength of the rack facing portion with respect to the screwing pressure of the male screw member into the screw through hole can be improved, and consequently the strength of the cover attaching device and the strength of the structure for attaching the cover to the cable rack can be improved.
[0063]
  Moreover, in invention of Claim 4, in any one of the said Claim 1 thru | or 3One paragraphIn addition to the effect ofThe rack facing part can be brought close to the cable rack, and the male screw member that is inserted into the screw through hole of the rack facing part and tightened toward the cable rack can be used with a short length, thereby reducing the component cost. Can do.
[0064]
  In the invention of claim 5,Since the mechanical connection and electrical connection between the cable rack and the cover can be performed by a single cover mounting device, the cover can be attached to the cable rack with an electrical connection with a simple structure. It becomes possible. Further, a child girder is installed between one end in the width direction of the parent girder arranged side by side to form a cable rack, and this cable rack is disposed substantially vertically, for example, on the side where the child girder is not installed. It is possible to provide a cover attaching device that is suitable for use when attaching the cover so as to span between the other end portions in the width direction.
[0065]
  In the invention of claim 6,Since the mechanical connection and electrical connection between the cable rack and the cover can be performed by a single cover mounting device, the cover can be attached to the cable rack with an electrical connection with a simple structure. It becomes possible. A cable rack is formed by laying a child girder between one end in the width direction of the parent girder arranged side by side, and this cable rack is disposed substantially vertically, for example, so that the child girder is erected. It is possible to provide a cover attaching device that is suitable for use when attaching a cover so as to span between one end portions in the width direction.
[0066]
  In the invention of claim 7, the aboveClaim 1Any one of 6One paragraphIn addition to the effect ofAs the male screw member, a normal bolt can be used instead of a self-tapping bolt, and the male screw member can be made inexpensive and the screwing operation of the male screw member into the screw through hole can be facilitated.
[0067]
  In the invention of claim 8, the aboveClaim 1Any one of 7One paragraphIn addition to the effect ofBy tightening one male screw member, mechanical connection and electrical connection can be performed simultaneously, and work efficiency can be improved.
[0069]
  Also,Claim 9The present invention is a cover mounting structure for a cable rack.8One ofOne paragraphSince the cover is attached via the cover attachment device described in 1., it is possible to attach the cover to the cable rack with electrical connection (mechanical connection) with a simple structure by simply interposing the cover attachment device. It has become.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a state in which a cover is attached to a cable rack using a cover attaching device according to an example of an embodiment of the present invention.
FIG. 2 is a perspective view of the same cover mounting device.
FIGS. 3A and 3B show the same cover mounting apparatus, wherein FIG. 3A is a front view, FIG. 3B is a left side view, FIG. 3C is a right side view, and FIG. (E) is a bottom view.
4A is a rear view of FIG. 3A, and FIG. 4B is a cross-sectional view taken along the line DD of FIG. 3D.
FIG. 5 is an explanatory view for explaining a work for attaching a cover to a cable rack using the cover attaching device same as above.
FIG. 6 is an explanatory view for explaining a work for attaching a cover to a cable rack using the cover attaching device same as above.
FIG. 7 is an explanatory diagram for explaining a work of attaching a cover to a cable rack using the cover attaching device same as above.
FIG. 8 is an explanatory view for explaining a work of attaching a cover to a cable rack using the cover attaching device same as above.
FIG. 9 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 10 is a perspective view of an L-shaped bracket of a cover mounting device according to another example of the embodiment of the present invention.
FIG. 11 shows the same L-shaped metal fitting, wherein (a) is a front view, (b) is a left side view, (c) is a right side view, and (d) is a top view; (E) is a bottom view.
12A and 12B show the L-shaped metal fitting, wherein FIG. 11A is a rear view of FIG. 11A, and FIG. 12B is a cross-sectional view taken along line EE of FIG.
FIG. 13 is a perspective view of a main part in a state where the cover is attached to the cable rack using the cover attaching device same as above.
FIG. 14 is an overall perspective view of a state where a cover is attached to a cable rack using the cover attaching device same as above.
15A and 15B show still another example of the cover mounting device according to the embodiment of the present invention, in which FIG. 15A is a front view, FIG. 15B is a side view, and FIG. 15C is a top view; ) Is a sectional view taken along line FF in FIG.
FIG. 16 is a side view of the second male screw member of the above.
FIG. 17 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 18 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 19 is an explanatory diagram for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 20 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 21 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 22 is an overall perspective view of a state where the cover is attached to the cable rack using the cover attaching device same as above.
FIG. 23 shows a state in which the cover is attached to the cable rack using the cover attaching device same as above, (a) is a side sectional view seen from the length direction of the child girder, and (b) is a perspective view of the cover. It is a top view, (c) is a side sectional view seen from the longitudinal direction of the main beam.
24A and 24B show a parent metal fitting of still another example of the cover mounting device according to the embodiment of the present invention, in which FIG. 24A is a front view, FIG. 24B is a left side view, and FIG. is there.
FIGS. 25A and 25B show a child metal fitting of the cover mounting device, wherein FIG. 25A is a front view, FIG. 25B is a left side view, and FIG. 25C is a bottom view;
FIG. 26 shows a state in which the cover is attached to the cable rack using the cover attaching device same as above, (a) is a side sectional view seen from the longitudinal direction of the child beam, (b) is a top view, (C) is side surface sectional drawing seen from the longitudinal direction of the main beam.
FIG. 27 is an explanatory diagram for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 28 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 29 is an explanatory diagram for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 30 is an explanatory view for explaining the work of attaching the cover to the cable rack using the cover attaching device same as above.
FIG. 31 is a perspective view of an essential part in a state where a cover is attached to a cable rack using the cover attaching device same as above.
FIG. 32 is an overall perspective view of a state in which the cover is attached to the cable rack using the cover attaching device same as above.
FIG. 33 is an exploded perspective view showing an example of the prior art.
FIG. 34 is an exploded perspective view for explaining the electrical connection between the cover and the cable rack.
FIG. 35 is a side sectional view of a main part for explaining the electrical connection between the cover and the cable rack;
[Explanation of symbols]
1 Cable rack
2 Cover
3 Cover mounting device
4 Parent digit
5 child digits
11 Rack facing part
12 Cover facing part
17 Screw through hole
17a First screw through hole
17b Second screw through hole
18 Male thread member
18a First male screw member
18b Second male screw member

Claims

A cover mounting device for attaching a cover to a ladder-shaped cable rack in which a plurality of child beams are installed between a pair of long parent beams with a space between them, A locking portion that is locked to one end in the width direction of the main beam, which is a direction orthogonal to the longitudinal direction of the beam and the child beam, a mounting portion that is positioned opposite to the locking portion and attaches a cover, and a locking portion And a connecting portion that connects the attachment portion to the width direction of the main girder, a cover facing portion that faces the cover is provided in the attaching portion, and the rack is opposed to the parent girder in the connecting portion. A screw through-hole into which a male screw member that makes electrical connection between the cable rack and the cover mounting device is provided by tightening toward the cable rack is provided in the rack facing portion, and tightening toward the cover Make electrical connection with the cover mounting device Cover mounting apparatus characterized by the external thread member is provided on the cover facing portion screw holes to be screwed that.

To ladder cable racks bridged at intervals multiple children digits between parent digit of a pair of elongated, a cover attachment device for attaching the cover so as to cover between the pair of parent digit one A bar member disposed between the pair of parent beams and sandwiching the cover between the parent beams, an engaging portion that engages with a longitudinal end portion of the bar member, and a continuous connection from the engaging portion A locking portion that locks to the main girder, a cover facing portion that faces the cover is provided in the engaging portion, a rack facing portion that faces the parent girder is provided in the locking portion, and is tightened toward the cable rack. The screw through hole into which the male screw member that makes electrical connection between the cable rack and the cover mounting device is screwed is provided in the rack facing portion, and tightened toward the cover to make electrical connection between the cover and the cover mounting device. The screw through hole into which the male screw member is screwed is opposed to the cover. Cover attachment device, characterized in that provided in the.

3. The cover mounting device according to claim 1 , wherein a reinforcing flange edge is provided at least on the rack facing portion .

The cover mounting device according to any one of claims 1 to 3, wherein a step portion corresponding to the outer shape of the cover or the cable rack is formed in the rack facing portion .

To ladder cable racks bridged at intervals multiple children digits between parent digit of a pair of elongated, a cover attachment device for attaching the cover so as to cover between the pair of parent digits, child The locking portion includes a locking portion that locks the girder, a mounting portion that is located at a position opposite to the locking portion and attaches a cover, and a connecting portion that connects the locking portion and the mounting portion. A rack facing part that opposes the girder is provided, a cover facing part that faces the cover is provided on the attachment part, and the male screw member that makes electrical connection between the cable rack and the cover mounting device is tightened by tightening toward the cable rack. A screw through hole is provided in the counter part of the rack, and a screw through hole into which the male screw member that makes electrical connection between the cover and the cover mounting device is tightened toward the cover is provided in the counter part of the cover. Provided in Flip cover mounting device being characterized in that the positionable at a position corresponding to the through hole having a through-hole in the cover.

A cover mounting device that attaches a cover to a ladder-shaped cable rack in which a plurality of child beams are installed between a pair of long main beams with a space between them, A locking portion that locks the girder, a mounting portion that is positioned substantially on the same plane as the locking portion and attaches the cover, and a connecting portion that connects the locking portion and the mounting portion. A male threaded member that provides a rack facing portion facing the child girder, a cover facing portion facing the cover at the attachment portion, and tightening toward the cable rack to electrically connect the cable rack and the cover mounting device A screw through-hole into which the screw is screwed is provided in the rack facing portion, and a screw through-hole into which the male screw member that makes electrical connection between the cover and the cover mounting device is tightened toward the cover is provided in the cover facing portion. Provided in the opposite part Cover attachment device being characterized in that to enable disposed at a position corresponding to the through hole having a screw through-hole in the cover.

The cover mounting device according to any one of claims 1 to 6, wherein a female screw is formed on each inner surface of the screw through hole .

The cover mounting apparatus according to any one of claims 1 to 7, wherein the cover is permanently fixed to the cable rack by tightening at least one male screw member .

A cover mounting structure for a cable rack, wherein a cover is attached to a cable rack composed of a parent beam and a child beam via the cover mounting device according to any one of claims 1 to 8.