JP4212367B2

JP4212367B2 - lighting equipment

Info

Publication number: JP4212367B2
Application number: JP2003011379A
Authority: JP
Inventors: 晋介中村; 勉 ▲はま▼田; 尚之山田
Original assignee: 小泉産業株式会社
Priority date: 2003-01-20
Filing date: 2003-01-20
Publication date: 2009-01-21
Anticipated expiration: 2023-01-20
Also published as: JP2004227812A

Description

【０００１】
【発明の属する技術分野】
本発明は、器具本体にカバー体を装着した照明器具に関し、特に、そのカバー体の落下防止機構を設けた照明器具に関する。
【０００２】
【従来の技術】
従来から、天井に取り付けられる器具本体に、取付部材によりカバー体が装着されており、該カバー体の落下を防止するための落下防止機構が備えられた照明器具が知られている。
例えば、特許文献１に記載される器具本体では、平面視にて方形に形成される器具本体の一辺部分に支持バネを取り付けるとともに、平面視にて方形に形成されるカバー体の支持バネ配置位置に相当する一辺部分に引掛金具を取り付けて、該支持バネと引掛金具とを係合可能に構成した落下防止機構を備えている。
この落下防止機構により、取付部材が外れてカバー体が落下しそうになると、該支持バネに引掛金具が係止して、カバー体が器具本体に吊り下げられた状態となリ、カバー体の落下が防止される。
【０００３】
【特許文献１】
特開平８−１０２２０６号公報
【０００４】
【発明が解決しようとする課題】
前述の如く構成された落下防止機構の引掛金具は、板金を折り曲げて形成されたものであり、カバー体に固着されている。即ち、引掛金具はカバー体と別体に形成して、該カバー体に固着したものである。
従って、落下防止機構を構成するためには照明器具に引掛金具を別途設ける必要があり、部品点数が増大してコストの上昇を招くことになる。
また、近年、カバー体は、アクリル系樹脂等の合成樹脂の一体成型品で構成されることが多いが、特に大型の照明器具の場合は、カバー体に反りが生じて器具本体とカバー体との間に隙間が生じ、見栄えが悪い外観となってしまう場合があった。さらに、本体とカバー体との間に隙間が生じると、そこから光が漏れたり、虫が照明器具内に侵入し易くなったり、という問題もある。
【０００５】
【課題を解決するための手段】
本発明の解決しようとする課題は以上の如くであり、次に該課題を解決するための手段を説明する。
即ち、請求項１に記載の如く、天井に取り付けられる器具本体に、取付部材によりカバー体が装着され、該カバー体の落下を防止するための落下防止機構を備える照明器具であって、該落下防止機構は、カバー体の取付枠部に形成され、水平方向内側へ突出する爪部材と、器具本体に設けられ該爪部材を係止可能な係止部材とで構成され、前記取付部材は器具本体の対向位置に少なくとも一対設けられ、前記係止部材は一対の取付部材を結ぶ方向と直交する方向に配置され、前記係止部材は、器具本体から垂下され爪部材の両側に配置されるサイドガイド部と、サイドガイド部よりも外側に配置されカバー体を係止可能な落下防止部とで構成され、前記器具本体における係止部材の配置位置と対向する位置に、カバー体をガイドするガイド部材を設けた。
【０００６】
また、請求項２に記載の如く、天井に取り付けられる器具本体に、取付部材によりカバー体が装着され、該カバー体の落下を防止するための落下防止機構を備える照明器具であって、該落下防止機構は、カバー体の取付枠部と、器具本体に設けられ該取付枠部を係止可能な係止部材とで構成され前記取付部材は器具本体の対向位置に少なくとも一対設けられ、前記係止部材は一対の取付部材を結ぶ方向と直交する方向に配置され、前記係止部材は、器具本体から垂下される一対のサイドガイド部と、一対のサイドガイド部よりも外側に配置されカバー体を係止可能な落下防止部とで構成され、前記器具本体における係止部材の配置位置と対向する位置に、カバー体をガイドするガイド部材を設けた。
【０００７】
また、請求項３に記載の如く、前記係止部材とガイド部材とは、同一部材で構成され、且つ同一姿勢で配置されている。
【００１６】
【発明の実施の形態】
次に、本発明の実施の形態を説明する。
図１は本発明の照明器具を示す斜視図、図２は同じく側面断面図、図３は同じく正面断面図、図４は同じく底面図、図５はカバー体が取付部材から外れたときのカバー体の様子を示す側面図、図６はカバー体の爪部材が器具本体の係止部材に係止している状態を示す斜視図、図７はガイド部材を設けた場合と設けない場合とのカバー体の装着状態の違いを示す図、図８はロール状の合成樹脂シートからカバー体が成型される様子を示す図、図９は係止部材とガイド部材との配置位置をずらした照明器具を示す底面図、図１０は器具本体にカバー体を装着した状態で、落下防止部がカバー体に当接するように構成した係止部材を示す側面断面図、図１１はサイドガイド部を直線状（略「Ｉ」字状）に形成した係止部材を示す側面断面図、図１２は係止部材及びガイド部材を幅広に構成した照明器具を示す底面図、図１３は器具本体及びカバー体を平面視にて略円形状に形成した照明器具を示す底面図、図１４は器具本体及びカバー体を平面視にて略円形状に形成した照明器具において、落下防止機構を構成するとともにガイド部材を設けた状態を示す底面図、図１５は器具本体及びカバー体を平面視にて略円形状に形成した照明器具において、落下防止機構を構成するとともにガイド部材を設けた場合に、落下防止機構及びガイド部材と取付部材とを、互いの位相を合わせて配置した状態を示す底面図である。
【００１７】
本発明の照明器具について説明する。図１〜図４に示す照明器具１は、天井面に取り付けられる器具本体１１に、カバー体２１を装着して構成されている。
器具本体１１は平面視にて略方形状に形成され、円環状の蛍光灯等のランプ３１が取り付けられている。
また、器具本体１１の周縁部には、カバー体２１を器具本体１１に装着するための取付部材１３・１３・・・が取り付けられている。
なお、以下の説明においては、便宜上、図２に表されている照明器具１の面を側面とし、図３に表されている照明器具１の面を正面（後面）とする。即ち、図２における左右方向を照明器具１の前後方向とし、図３における左右方向を照明器具１の左右方向とする。
【００１８】
取付部材１３においては、カバー受け部材１３ｂが本体１３ａから外方へ進退可能に突出しており、該カバー受け部材１３ｂがカバー体２１の上端部に形成される取付枠部２２の下面に係止することで、カバー体２１が器具本体１１に装着されている。
取付部材１３は、器具本体１１の対向する２辺の位置に、一対又は複数対設けられている。本実施例では、左右の辺の部分に配置されている。
【００１９】
また、照明装置１には、カバー体２１の落下を防止するための落下防止機構３５が構成されている。
落下防止機構３５は、器具本体１１の２辺に配置される一対又は複数対の取付部材１３を結ぶ方向と直交する方向に配置されている。本実施例では、前後の辺の部分に配置されている。
【００２０】
器具本体１１の前後方向の１辺には、落下防止機構３５を構成する係止部材１２が取り付けられている。
係止部材１２は、線状部材を屈曲して形成されており、器具本体１１から所定間隔を隔てて垂下される左右のサイドガイド部１２ａ・１２ａと、水平方向に横設される落下防止部１２ｂにて構成される。
【００２１】
サイドガイド部１２ａは、下端部が外側に向って屈曲しており、側面視にて略「Ｊ」字状又は略「Ｌ」字状に形成されている。
落下防止部１２ｂは、両サイドガイド部１２ａ・１２ａの先端部に接続されている。
【００２２】
一方、カバー体２１の取付枠部２２における、係止部材１２に対応する位置の１辺には、水平方向内側へ突出する爪部材２３ａが形成されている。
係止部材１２に対応する位置の辺に設けられる爪部材２３ａは、器具本体１１側の係止部材１２とともに、落下防止機構３５を構成している。
【００２３】
カバー体２１を取付部材１３・１３・・・により器具本体１１に装着した状態では、カバー体２１の爪部材２３ａは、両サイドガイド部１２ａ・１２ａの間に位置するとともに、該サイドガイド部１２ａよりも内側に突出している。また、カバー体２１が器具本体１１に装着された状態では、落下防止部１２ｂは爪部材２３ａに対して所定の間隔を隔てて下方に位置しており、該落下防止部１２ｂは爪部材２３ａ及び取付枠部２２の下面に係止していない。
【００２４】
落下防止機構３５が構成される側とは前後逆側における器具本体１１の１辺部分には、前記係止部材１２と同一形状に形成されるガイド部材１６が取り付けられている。
即ち、ガイド部材１６は、線状部材を屈曲して形成されており、器具本体１１から所定間隔を隔てて垂下される左右のサイドガイド部１６ａ・１６ａと、水平方向に横設される連結部１６ｂにて構成される。サイドガイド部１６ａは、下端部が内側に向って屈曲しており、側面視にて略「Ｊ」字状に形成されている。連結部１６ｂは、両サイドガイド部１６ａ・１６ａの先端部に接続されており、サイドガイド部１６ａよりも前後内側に配置されている。
【００２５】
図２に示すように、ガイド部材１６のサイドガイド部１６ａの下端部と、係止部材１２のサイドガイド部１２ａの下端部とは、同一方向に屈曲されており（図２では左側）、ガイド部材１６と係止部材１２とは、同一の部材にて構成されており、それぞれが同一の姿勢で器具本体１１の対向する前後両端部にそれぞれ取り付けられている。
【００２６】
一方、カバー体２１の取付枠部２２における、ガイド部材１６に対応する位置の１辺には、水平方向内側へ突出する爪部材２３ｂが形成されている。
カバー体２１は、合成樹脂シートを圧空成型などすることで構成されており、カバー体２１の本体を成型する際に、同時に爪部材２３ａ・２３ｂも一体的に成型される。
【００２７】
カバー体２１を取付部材１３・１３・・・により器具本体１１に装着した状態では、カバー体２１の爪部材２３ｂは、左右方向では両サイドガイド部１６ａ・１６ａの間に位置している。しかし、爪部材２３ｂは、連結部１６ｂよりも前後外側に位置しており、連結部１６ｂと爪部材２３ｂ及び取付枠部２２とは平面視にて重なっていない。
【００２８】
そして、図５・図６に示すように、取付部材１３・１３・・・により装着されていたカバー体２１が器具本体１１から外れて下方へ落下しようとすると、該カバー体２１の爪部材２３ａ又は取付枠部２２が係止部材１２に係止する。
また、爪部材２３ａと反対側に位置する爪部材２３ｂ又は取付枠部２２は、ガイド部材１６の連結部１６ｂには係止せず、そのまま下方へ落下する。
【００２９】
その結果、カバー体２１は、爪部材２３ｂが形成された側が下方へ回動した状態で、爪部材２３ａが形成された側が係止部材１２に係止して、該係止部材１２に吊着されることになる。
つまり、器具本体１１に装着されていたカバー体２１が外れた場合には、落下防止機構３５を構成する、カバー体２１の爪部材２３ａ又は取付枠部２２と、器具本体１１の係止部材１２とが係止して、カバー体２１が落下することを防止することができる。
【００３０】
このように、カバー体２１は、器具本体１１の係止部材１２に係止する爪部材２３ａを備えているが、該爪部材２３ａはカバー体２１と一体的に成型されているので、例えば、カバー体とは別体に形成された爪部材を該カバー体に取り付けた場合に比べて、部品点数を削減することができてコストダウンを図ることができる。
また、取付枠部２２から内側へ向って突出する爪部材２３ａは、カバー体２１の一辺のある程度の範囲にわたって形成されており（例えば、カバー体２１の一辺の長さをＬ１とすると、爪部材２３ａは長さＬ２だけ形成されている）、該取付枠部２２にリブを形成したかの如く、取付枠部２２を補強することが可能となって、カバー体２１の変形や反りを防止することができる。
カバー体２１に変形や反りが生じると、その変形や反りにより器具本体１１とカバー体２１との間に隙間ができて、外観上見栄えが悪くなったり、光漏れが発生したり、照明器具１内に虫が侵入したりする場合があるが、爪部材２３ａを形成することで、このような不具合の発生を防止することが可能となる。
【００３１】
また、爪部材２３ａと係止部材１２とで構成される落下防止機構３５は、器具本体１１の左右の２辺に設けられる取付部材１３・１３を結ぶ方向と直交する方向に配置されている。
これにより、図６に示すように、取付部材１３・１３を外せば、器具本体１１に装着されていたカバー体２１を、その一側が係止部材１２により吊り下げられた状態で大きく開くことができ、ランプ３１の交換作業を容易に行うことができる。
【００３２】
また、前記爪部材２３ａは、カバー体２１の取付枠部２２から水平方向内側へ突出する突起であり、係止部材１２は、側面視略「Ｊ」字状のサイドガイド部１２ａ・１２ａ及びこれらを連結する落下防止部１２ｂにて構成されており、爪部材２３ａの両側方及び下方をガイド可能となっている。
従って、係止部材１２は、カバー体２１を吊り下げるだけでなく、カバー体２１の左右位置決めを行うことも可能となっている。
即ち、カバー体２１を器具本体１１に装着する際に、該爪部材２３ａを係止部材１２に差し込むことで、サイドガイド部１２ａ・１２ａによりカバー体２１の左右方向の位置決めを行うことができ、カバー体２１の装着作業を容易にすることができる。
【００３３】
そして、係止部材１２は、線状部材を屈曲してサイドガイド部１２ａ・１２ａ及び落下防止部１２ｂを形成しているので、係止部材１２を簡単かつ安価に構成することができる。
さらに、サイドガイド部１２ａ・１２ａは外側に屈曲した側面視略「Ｊ」字形状に形成されて、落下防止部１２ｂはサイドガイド部１２ａ・１２ａよりも外側に配置されているので、カバー体２１を器具本体１１に装着した際に、落下防止部１２ｂが爪部材２３ａ又は取付枠部２２の下方に位置することとなって、カバー体２１の落下を確実に防止することができる。
【００３４】
前述のように、前記係止部材１２は器具本体１１の一辺に設けられており、その一辺と対向する他の一辺に、係止部材１２と同一部材で形成されるガイド部材１６が同じ姿勢で設けられている。
ここで、例えば、図７（ａ）に示すように、係止部材１２が器具本体１１の一辺に設けられているのみで、ガイド部材１６が設けられていないと、カバー体２１が器具本体１１に対して前後方向にずれた状態で取り付けられようとした場合、一部の取付部材１３がカバー体２１と係止した状態で、カバー体２１が器具本体１１に装着され得る（例えば図７（ａ）では、カバー体２１が係止部材１２側にずれており、図７（ａ）における右側の取付部材１３がカバー体２１と係止している。）。
このように、一部の取付部材１３が係止した状態でカバー体２１が器具本体１１に装着された状態になっていると、カバー体２１が器具本体１１から脱落しやすいため好ましくない。
【００３５】
これに対し、図７（ｂ）に示すように、本案照明器具１のように、ガイド部材１６を設けていると、カバー体２１が器具本体１１に対して前後方向にずれた状態で取り付けられようとした場合には、ガイド部材１６のサイドガイド部１６ａ・１６ａは取付枠部２２付近から内側へ屈曲しているので、ガイド部材１６がカバー体２１の取付枠部２２等に当接して、取付部材１３がカバー体２１と係止せず、該カバー体２１を器具本体に装着することができない。
従って、一部の取付部材１３が係止した脱落し易い状態でカバー体２１が器具本体１１に装着されることを防止することができる。
【００３６】
また、ガイド部材１６は、係止部材１２と同一部材にて構成され、サイドガイド部１６ａ・１６ａを備えているため、図４などに示すように、爪部材２３ｂの両側方をサイドガイド部１６ａ・１６ａによりガイドすることができる。
従って、カバー体２１を器具本体１１に装着する際には、該カバー体２１の一辺側を係止部材１２によりガイドするだけでなく、対向する他の一辺側をもガイド部材１６によりガイドすることができ、カバー体２１装着時の左右の位置決めを確実且つ正確に行うことができる。
また、係止部材１２とガイド部材１６とを共通の部材で構成することができるので、部品点数を削減して低コスト化を図ることができる。
【００３７】
また、合成樹脂にて構成されるカバー体２１は、前述の如くシート状の合成樹脂を成型することにより得られる。具体的には図８（ａ）に示すように、ロール状に巻き取られた合成樹脂シート５５を所定の長さに切断して、熱を加えて柔らかくした後、図８（ｂ）に示すように、型材５６・５６にて成型し冷却することで、図８（ｃ）のようにカバー体２１が形成される。
【００３８】
この、カバー体２１を成型するための合成樹脂素材である合成樹脂シート５５は、短手方向（図８（ａ）におけるＸ方向）にはあまり反りが発生しないが、長手方向（図８（ａ）におけるＹ方向）に反りが発生することがある。
この反りは、合成樹脂シート５５から成型されたカバー体２１にも残留し、例えば、合成樹脂シート５５のＹ方向がカバー体２１の爪部材２３ａ・２３ｂが形成される辺に相当する場合には、爪部材２３ａ・２３ｂが形成される辺に上下方向の反りが発生することとなる。
【００３９】
カバー体２１の各辺に反りが発生した場合、その反りが取付部材１３・１３・・・に係止される辺に発生していたときには、その反りにより器具本体１１とカバー体２１との間に隙間ができて、外観上見栄えが悪くなったり、光漏れが発生したり、照明器具１内に虫が侵入したりする場合がある。
また、反りによりカバー体２１と器具本体１１との間に隙間が生じて、取付部材１３のカバー受け部材１３ａがカバー体２１を係止することができずに、該カバー体２１を器具本体１１に装着することができなくなってしまう場合もある。
これに対し、反りが爪部材２３ａ・２３ｂが形成される辺に発生していたときは、特にカバー体２１を装着することに対して障害となることはない。
【００４０】
また、本照明器具１においては、反りが生じ易い合成樹脂シート５５のＹ方向が、カバー体２１の爪部材２３ａ・２３ｂが形成される辺に相当するように、成型時の合成樹脂シート５５の成型方向を定めている。
即ち、カバー体２１における、合成樹脂シート５５のＸ方向（短手方向）に相当する辺に取付部材１３・１３・・・を配置し、Ｙ方向（長手方向）に相当する辺に爪部材２３ａ・２３ｂを配置している。
このように構成することで、カバー体２１の器具本体１１への装着不良が低減し、カバー体２１が確実に装着されることとなる。
【００４１】
また、本実施例では、器具本体側の係止部材１２及びカバー体２１側の爪部材２３ａ、並びに器具本体側のガイド部材１６及びカバー体２１側の爪部材２３ｂ
は、それぞれ器具本体１１の左右中心位置に配置されているため、カバー体２１を、前後方向を逆にして取り付けることも可能である。
しかし、カバー体２１の一辺側とそれに対向する他辺側とで異なる特性を具備させた場合など、カバー体２１の一辺側と他辺側とが逆に取り付けられることが望ましくない場合は、図９に示すように、係止部材１２及び爪部材２３ａと、ガイド部材１６及び爪部材２３ｂとの照明器具１に左右位置を互いにずらして配置することができる。
【００４２】
つまり、互いに異なる左右位置にずらして配置するとは、係止部材１２及び爪部材２３ａと、ガイド部材１６及び爪部材２３ｂとを結ぶ線と直交する方向の配置位置を、互いに異ならせるということである。
このように左右位置をずらして配置することで、カバー体２１は一方向にしか装着することができず、取付方向を誤ることがない。
【００４３】
また、本実施例においては、取付枠部２２がカバー体２１の本体と一体的に形成されているため、取付枠部２２に一体的に形成される爪部材２３ａ・２３ｂも、カバー体２１の本体と一体的に形成されているが、次のような場合でも、本例の場合と同様の効果を奏することができる。
例えば、合成樹脂にて構成される本体に、装飾用の木枠を取付枠部として取り付けたカバー体の場合は、木枠に内側へ突出する爪部材を一体的に形成して、この木製の爪部材にて落下防止機構を構成することができる。
このように、木枠に一体的に爪部材を形成することで、器具本体１１の係止部材１２に係止する爪部材を、金具などで別途形成する必要がなく、部品点数を減少してコストダウンを図ることができる。
【００４４】
また、図１０に示すように、前述の係止部材１２は上下方向の寸法を短く構成して、器具本体１１にカバー体２１を装着した状態で、落下防止部１２ｂがカバー体２１の取付枠部２２又は爪部材２３ａの下面に当接するように構成することもできる。
この場合は、器具本体１１にカバー体２１を装着した状態で、係止部材１２とカバー体２１との間には上下に隙間がなく、係止部材１２によりカバー体２１を支持していることとなる。
従って、カバー体２１の爪部材２３ａが形成されている辺に反りが発生していたとしても、その反りを係止部材１２により抑え込むことができ、器具本体１１とカバー体２１との間に隙間が生じることを防止できる。
【００４５】
また、図１１に示すように、係止部材１２とカバー体２１との間に上下隙間を無くして、器具本体１１にカバー体２１を装着した状態で、係止部材１２によりカバー体２１を支持する場合は、係止部材１２のサイドガイド部１２ａを直線状（略「Ｉ」字状）に形成してもよい。
このような形状にすることで、係止部材１２の形成を容易にすることができ、コスト低減を図ることもできる。
【００４６】
また、図１２に示すように、前述の係止部材１２及びガイド部材１６を幅広に構成することもできる。
即ち、係止部材１２及びガイド部材１６の左右幅を、カバー体２１の一辺の長さ程度まで拡張して構成し、該係止部材１２及びガイド部材１６のサイドガイド部１２ｂ・１６ｂにて、カバー体２１の取付枠部２２における係止部材１２及びガイド部材１６が配置される辺（図１２では水平方向の辺）と直交する辺（図１２では垂直方向の辺）をガイドすることができるようにしている。
この場合は、係止部材１２の落下防止部１２ｂはカバー体２１の取付枠部２２の下面を係止可能であり、サイドガイド部１２ｂ・１６ｂは取付枠部２２の左右の辺をガイド可能であるので、前述のカバー体２１のように、爪部材２３ａ・２３ｂを形成する必要がなく、従来のカバー体と同じカバー体を用いることが可能である。
なお、本実施例の係止部材１２及びガイド部材１６は、線状部材を屈曲して構成されているが、合成樹脂等で構成される板状部材や棒状部材等といった他の部材にて構成することもできる。
【００４７】
また、図１３に示すように、器具本体１１及びカバー体２１が、平面視にて略円形状に形成されている場合でも、略方形に形成した場合と同様に、係止部材１２と爪部材２３ａとで構成される落下防止機構３５を設けることができる。さらに、落下防止機構３５の対向位置にガイド部材１６及び爪部材２３ｂを設けることもできる。
図１３に示す照明器具１の場合、２つ設けられる取付部材１３・１３は互いに対向する位置に配置されており、落下防止機構３５（係止部材１２及び爪部材２３ａ）とガイド部材１６及び爪部材２３ｂとは、取付部材１３・１３を結ぶ線と直交する方向に配置されている。そして、落下防止機構３５は、２つの取付部材１３・１３の間に配置されていることとなっている。
このように、器具本体１１及びカバー体２１が略円形状の場合でも、本案の落下防止機構３５は設けることが可能であり、広汎な仕様の照明器具１に該落下防止機構３５を適用することが可能となっている。
【００４８】
また、図１４に示すように、器具本体１１及びカバー体２１が、平面視にて略円形状に形成されている場合においても、係止部材１２の落下防止部１２ｂはカバー体２１の取付枠部２２の下面を係止可能に構成するとともに、ガイド部材１６にてカバー体２１の取付枠部２２の内周面をガイドするように構成することもできる。
これにより、カバー体２１に爪部材２３ａ・２３ｂを形成することなく、従来のカバー体と同じカバー体を用いつつ、落下防止機構３５を構成するとともに、器具本体１１に対するカバー体２１の位置決めをすることが可能となる。
なお、図１４では、係止部材１２と対向する位置にガイド部材１６が配置され、取付部材１３・１３は、係止部材１２とガイド部材１６とを結ぶ方向と、直交する方向に配置されている。
【００４９】
また、カバー体２１に爪部材２３ａ・２３ｂを形成しないように構成した場合は、図１５に示すように、係止部材１２及びガイド部材１６と、取付部材１３・１３とを、互いに位相を合わせた位置に配置することも可能である。
【００５０】
【発明の効果】
本発明は以上の如く構成したので、次のような効果を奏するのである。即ち、請求項１記載の如く、天井に取り付けられる器具本体に、取付部材によりカバー体が装着され、該カバー体の落下を防止するための落下防止機構を備える照明器具であって、該落下防止機構は、カバー体の取付枠部に形成され、水平方向内側へ突出する爪部材と、器具本体に設けられ該爪部材を係止可能な係止部材とで構成され、前記取付部材は器具本体の対向位置に少なくとも一対設けられ、前記係止部材は一対の取付部材を結ぶ方向と直交する方向に配置され、前記係止部材は、器具本体から垂下され爪部材の両側に配置されるサイドガイド部と、サイドガイド部よりも外側に配置されカバー体を係止可能な落下防止部とで構成され、前記器具本体における係止部材の配置位置と対向する位置に、カバー体をガイドするガイド部材を設けたので、
カバー体とは別体に形成された金具などで構成される爪部材を、該カバー体に取り付けた場合に比べて、部品点数を削減することができてコストダウンを図ることができる。
また、内側へ向って突出する爪部材は、カバー体にリブを形成したかの如く、該カバー体を補強することが可能となって、カバー体の変形を防止することができる。
カバー体に変形や反りが生じると、その変形や反りにより器具本体とカバー体との間に隙間ができて、外観上見栄えが悪くなったり、光漏れが発生したり、照明器具内に虫が侵入したりする場合があるが、爪部材を形成することで、このような不具合の発生を防止することが可能となる。
また、取付部材を外せば、器具本体に装着されていたカバー体を、その一側が係止部材により吊り下げられた状態で大きく開くことができ、ランプの交換作業を容易に行うことができる。
また、係止部材を簡単かつ安価に構成することができ、カバー体を器具本体に装着した際に、落下防止部がカバー体の爪部材又は取付枠部の下方に位置することとなって、カバー体の落下を確実に防止することができる。
また、カバー体が器具本体にずれた状態で取り付けられようとした場合には、ガイド部材がカバー体に当接して、該カバー体を器具本体に装着することができなくなり、一部の取付部材が係止した脱落し易い状態でカバー体が器具本体に装着されることを防止できる。さらに、カバー体を器具本体に装着する際には、該カバー体の一辺側を係止部材によりガイドするだけでなく、対向する他の一辺側をもガイド部材によりガイドすることができ、カバー体装着時の左右の位置決めを確実且つ正確に行うことができる。
【００５１】
さらに、請求項２記載の如く、天井に取り付けられる器具本体に、取付部材によりカバー体が装着され、該カバー体の落下を防止するための落下防止機構を備える照明器具であって、該落下防止機構は、カバー体の取付枠部と、器具本体に設けられ該取付枠部を係止可能な係止部材とで構成され、前記取付部材は器具本体の対向位置に少なくとも一対設けられ、前記係止部材は一対の取付部材を結ぶ方向と直交する方向に配置され、前記係止部材は、器具本体から垂下される一対のサイドガイド部と、一対のサイドガイド部よりも外側に配置されカバー体を係止可能な落下防止部とで構成され、前記器具本体における係止部材の配置位置と対向する位置に、カバー体をガイドするガイド部材を設けたので、
カバー体とは別体に形成された金具などで構成される爪部材を、該カバー体に取り付けた場合に比べて、部品点数を削減することができてコストダウンを図ることができる。
また、内側へ向って突出する爪部材は、カバー体にリブを形成したかの如く、該カバー体を補強することが可能となって、カバー体の変形を防止することができる。
カバー体に変形や反りが生じると、その変形や反りにより器具本体とカバー体との間に隙間ができて、外観上見栄えが悪くなったり、光漏れが発生したり、照明器具内に虫が侵入したりする場合があるが、爪部材を形成することで、このような不具合の発生を防止することが可能となる。
また、取付部材を外せば、器具本体に装着されていたカバー体を、その一側が係止部材により吊り下げられた状態で大きく開くことができ、ランプの交換作業を容易に行うことができる。
また、係止部材を簡単かつ安価に構成することができ、カバー体を器具本体に装着した際に、落下防止部がカバー体の爪部材又は取付枠部の下方に位置することとなって、カバー体の落下を確実に防止することができる。
また、カバー体が器具本体にずれた状態で取り付けられようとした場合には、ガイド部材がカバー体に当接して、該カバー体を器具本体に装着することができなくなり、一部の取付部材が係止した脱落し易い状態でカバー体が器具本体に装着されることを防止できる。さらに、カバー体を器具本体に装着する際には、該カバー体の一辺側を係止部材によりガイドするだけでなく、対向する他の一辺側をもガイド部材によりガイドすることができ、カバー体装着時の左右の位置決めを確実且つ正確に行うことができる。
【００５２】
さらに、請求項３記載の如く、前記係止部材とガイド部材とは、同一部材で構成され、且つ同一姿勢で配置されているので、
係止部材とガイド部材とを共通の部材で構成することができるので、部品点数を削減して低コスト化を図ることができる。
【図面の簡単な説明】
【図１】本発明の照明器具を示す斜視図である。
【図２】同じく側面断面図である。
【図３】同じく正面断面図である。
【図４】同じく底面図である。
【図５】カバー体が取付部材から外れたときのカバー体の様子を示す側面図である。
【図６】カバー体の爪部材が器具本体の係止部材に係止している状態を示す斜視図である。
【図７】ガイド部材を設けた場合と設けない場合とのカバー体の装着状態の違いを示す図である。
【図８】ロール状の合成樹脂シートからカバー体が成型される様子を示す図である。
【図９】係止部材とガイド部材との配置位置をずらした照明器具を示す底面図である。
【図１０】器具本体にカバー体を装着した状態で、落下防止部がカバー体に当接するように構成した係止部材を示す側面断面図である。
【図１１】サイドガイド部を直線状（略「Ｉ」字状）に形成した係止部材を示す側面断面図である。
【図１２】係止部材及びガイド部材を幅広に構成した照明器具を示す底面図である。
【図１３】器具本体及びカバー体を平面視にて略円形状に形成した照明器具を示す底面図である。
【図１４】器具本体及びカバー体を平面視にて略円形状に形成した照明器具において、落下防止機構を構成するとともにガイド部材を設けた状態を示す底面図である。
【図１５】器具本体及びカバー体を平面視にて略円形状に形成した照明器具において、落下防止機構を構成するとともにガイド部材を設けた場合に、落下防止機構及びガイド部材と取付部材とを、互いの位相を合わせて配置した状態を示す底面図である。
【符号の説明】
１照明器具
１１器具本体
１２係止部材
１２ａサイドガイド部
１２ｂ落下防止部
１３取付部材
１３ｂカバー受け部材
１６ガイド部材
１６ａサイドガイド部
１６ｂ連結部
２１カバー体
２２取付枠部
２３ａ・２３ｂ爪部材
３５落下防止機構
５５合成樹脂シート[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a lighting fixture in which a cover body is mounted on a fixture body, and more particularly to a lighting fixture provided with a fall prevention mechanism for the cover body.
[0002]
[Prior art]
  2. Description of the Related Art Conventionally, there has been known a lighting fixture in which a cover body is attached to a fixture main body attached to a ceiling with an attachment member, and a fall prevention mechanism for preventing the fall of the cover body is provided.
  For example, in the instrument body described in Patent Document 1, a support spring is attached to one side portion of the instrument body that is formed in a square shape in plan view, and the support spring arrangement position of the cover body that is formed in a square shape in plan view A drop-preventing mechanism is provided in which a hook metal fitting is attached to one side portion corresponding to and the support spring and the hook metal metal are engageable.
  With this fall prevention mechanism, when the mounting member is detached and the cover body is about to fall, the hook metal is locked to the support spring, and the cover body is suspended from the instrument body. Is prevented.
[0003]
[Patent Document 1]
  JP-A-8-102206
[0004]
[Problems to be solved by the invention]
  The hook of the fall prevention mechanism configured as described above is formed by bending a sheet metal, and is fixed to the cover body. That is, the hook metal fitting is formed separately from the cover body and is fixed to the cover body.
  Therefore, in order to configure the fall prevention mechanism, it is necessary to separately provide a hook fitting on the lighting fixture, which increases the number of parts and causes an increase in cost.
  In recent years, the cover body is often composed of an integrally molded product of a synthetic resin such as an acrylic resin. However, particularly in the case of a large luminaire, the cover body is warped, and the instrument body and the cover body In some cases, there was a gap between the two, resulting in an unpleasant appearance. Further, when a gap is generated between the main body and the cover body, there is a problem that light leaks from the gap and insects easily enter the lighting apparatus.
[0005]
[Means for Solving the Problems]
  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
  That is,As claimed in claim 1A lighting fixture having a cover body attached to a fixture body attached to a ceiling by a mounting member and having a fall prevention mechanism for preventing the fall of the cover body, the fall prevention mechanism comprising a cover bodyIt is formed on the mounting frame part and protrudes inward in the horizontal directionIt is composed of a claw member and a locking member provided on the instrument body and capable of locking the claw member.The mounting members are provided at least in a pair at opposite positions of the instrument body, the locking members are arranged in a direction orthogonal to the direction connecting the pair of mounting members, and the locking members are suspended from the instrument body and It is composed of a side guide portion arranged on both sides, and a fall prevention portion arranged outside the side guide portion and capable of locking the cover body, and at a position facing the arrangement position of the locking member in the instrument body, A guide member for guiding the cover body is provided..
[0006]
  Further, as described in claim 2,A lighting device having a cover body attached to a fixture body attached to a ceiling by a mounting member and having a fall prevention mechanism for preventing the cover body from falling, wherein the fall prevention mechanism includes an attachment frame portion of the cover body And a locking member that is provided on the instrument main body and that can lock the mounting frame portion, and at least a pair of the mounting members are provided at opposite positions of the instrument main body, and the locking members connect the pair of mounting members. The locking member includes a pair of side guide portions depending from the instrument body, and a fall prevention portion that is disposed outside the pair of side guide portions and can lock the cover body. A guide member configured to guide the cover body is provided at a position opposite to the arrangement position of the locking member in the instrument body..
[0007]
  Further, as described in claim 3,The locking member and the guide member are composed of the same member and are arranged in the same posture..
[0016]
DETAILED DESCRIPTION OF THE INVENTION
  Next, an embodiment of the present invention will be described.
  1 is a perspective view showing a lighting fixture of the present invention, FIG. 2 is a side sectional view, FIG. 3 is a front sectional view, FIG. 4 is a bottom view, and FIG. 5 is a cover when the cover body is detached from the mounting member. 6 is a perspective view showing a state in which the claw member of the cover body is locked to the locking member of the instrument body, and FIG. 7 is a case where the guide member is provided and a case where the guide member is not provided. The figure which shows the difference in the mounting state of a cover body, FIG. 8 is a figure which shows a mode that a cover body is shape | molded from a roll-shaped synthetic resin sheet, FIG. 9 is the lighting fixture which shifted the arrangement position of a locking member and a guide member FIG. 10 is a side cross-sectional view showing a locking member configured such that the fall prevention part comes into contact with the cover body in a state where the cover body is mounted on the instrument body, and FIG. FIG. 12 is a side sectional view showing a locking member formed in a (substantially “I” shape). FIG. 13 is a bottom view showing a lighting fixture having a fixture body and a cover member formed in a substantially circular shape in plan view, and FIG. FIG. 15 is a bottom view showing a state in which a guide member is provided as well as a fall prevention mechanism in a lighting fixture in which a cover body is formed in a substantially circular shape in plan view. FIG. 15 is a schematic view of the fixture body and cover body in a plan view. In the lighting fixture formed in the shape, when the fall prevention mechanism is configured and the guide member is provided, the fall prevention mechanism, the guide member, and the mounting member are arranged in phase with each other. .
[0017]
  The lighting fixture of this invention is demonstrated. The lighting fixture 1 shown in FIGS. 1-4 is comprised by mounting | wearing with the cover body 21 to the fixture main body 11 attached to a ceiling surface.
  The instrument main body 11 is formed in a substantially rectangular shape in plan view, and a lamp 31 such as an annular fluorescent lamp is attached.
  Further, attachment members 13, 13... For attaching the cover body 21 to the instrument body 11 are attached to the peripheral edge of the instrument body 11.
  In the following description, for the sake of convenience, the surface of the luminaire 1 shown in FIG. 2 is defined as a side surface, and the surface of the luminaire 1 illustrated in FIG. 3 is defined as a front surface (rear surface). That is, let the left-right direction in FIG. 2 be the front-back direction of the lighting fixture 1, and let the left-right direction in FIG.
[0018]
  In the attachment member 13, a cover receiving member 13 b protrudes from the main body 13 a so as to be able to advance and retreat outward, and the cover receiving member 13 b is engaged with the lower surface of the attachment frame portion 22 formed at the upper end portion of the cover body 21. Thus, the cover body 21 is attached to the instrument body 11.
  A pair or a plurality of attachment members 13 are provided at the positions of two opposing sides of the instrument body 11. In this embodiment, they are arranged on the left and right sides.
[0019]
  In addition, the lighting device 1 includes a fall prevention mechanism 35 for preventing the cover body 21 from falling.
  The fall prevention mechanism 35 is disposed in a direction orthogonal to the direction connecting the pair or plural pairs of attachment members 13 disposed on the two sides of the instrument body 11. In this embodiment, they are arranged on the front and rear sides.
[0020]
A locking member 12 that constitutes a fall prevention mechanism 35 is attached to one side of the instrument body 11 in the front-rear direction.
  The locking member 12 is formed by bending a linear member, and left and right side guide portions 12a and 12a that are suspended from the instrument body 11 at a predetermined interval, and a fall prevention portion that is horizontally provided in the horizontal direction. 12b.
[0021]
  The side guide portion 12a has a lower end bent outward and is formed in a substantially “J” shape or a substantially “L” shape in a side view.
  The fall prevention part 12b is connected to the tip part of both side guide parts 12a and 12a.
[0022]
  On the other hand, a claw member 23 a that protrudes inward in the horizontal direction is formed on one side of the attachment frame portion 22 of the cover body 21 at a position corresponding to the locking member 12.
  The claw member 23 a provided on the side corresponding to the locking member 12 constitutes a fall prevention mechanism 35 together with the locking member 12 on the instrument body 11 side.
[0023]
  In a state in which the cover body 21 is attached to the instrument main body 11 by the attachment members 13, 13,..., The claw member 23a of the cover body 21 is located between the side guide portions 12a, 12a, and the side guide portion 12a. Protrudes inward than. Further, in a state where the cover body 21 is attached to the instrument main body 11, the fall prevention unit 12b is positioned below the nail member 23a with a predetermined interval, and the fall prevention unit 12b includes the nail member 23a and the nail member 23a. It is not locked to the lower surface of the mounting frame portion 22.
[0024]
  A guide member 16 formed in the same shape as the locking member 12 is attached to one side portion of the instrument body 11 on the opposite side to the side on which the fall prevention mechanism 35 is configured.
  That is, the guide member 16 is formed by bending a linear member, and the left and right side guide portions 16a and 16a suspended from the instrument main body 11 at a predetermined interval, and the connecting portion horizontally provided in the horizontal direction. 16b. The side guide portion 16a has a lower end bent toward the inside, and is formed in a substantially “J” shape in a side view. The connecting portion 16b is connected to the tip end portions of the side guide portions 16a and 16a, and is disposed on the front and rear inner sides of the side guide portions 16a.
[0025]
  As shown in FIG. 2, the lower end portion of the side guide portion 16a of the guide member 16 and the lower end portion of the side guide portion 12a of the locking member 12 are bent in the same direction (left side in FIG. 2), and the guide The member 16 and the locking member 12 are constituted by the same member, and are respectively attached to the front and rear opposite ends of the instrument body 11 in the same posture.
[0026]
  On the other hand, a claw member 23b that protrudes inward in the horizontal direction is formed on one side of the attachment frame portion 22 of the cover body 21 at a position corresponding to the guide member 16.
  The cover body 21 is configured by pressure forming or the like of a synthetic resin sheet. When the body of the cover body 21 is molded, the claw members 23a and 23b are also integrally molded at the same time.
[0027]
  In a state in which the cover body 21 is attached to the instrument main body 11 by the attachment members 13, 13..., The claw member 23 b of the cover body 21 is located between the side guide portions 16 a and 16 a in the left-right direction. However, the claw member 23b is located on the front and rear outside of the connecting portion 16b, and the connecting portion 16b, the claw member 23b, and the mounting frame portion 22 do not overlap in plan view.
[0028]
  As shown in FIGS. 5 and 6, when the cover body 21 mounted by the attachment members 13, 13... Is detached from the instrument body 11 and falls downward, the claw member 23a of the cover body 21 is provided. Alternatively, the attachment frame portion 22 is locked to the locking member 12.
  Further, the claw member 23b or the attachment frame portion 22 located on the opposite side to the claw member 23a does not engage with the connecting portion 16b of the guide member 16 and falls as it is.
[0029]
  As a result, the cover body 21 is hung on the locking member 12 while the side on which the claw member 23b is formed is rotated downward and the side on which the claw member 23a is formed is locked to the locking member 12. Will be.
  That is, when the cover body 21 attached to the instrument main body 11 is removed, the claw member 23a or the attachment frame portion 22 of the cover body 21 and the locking member 12 of the instrument main body 11 constituting the fall prevention mechanism 35. And the cover body 21 can be prevented from falling.
[0030]
  As described above, the cover body 21 includes the claw member 23a that is locked to the locking member 12 of the instrument main body 11, and the claw member 23a is formed integrally with the cover body 21. Compared with the case where the claw member formed separately from the cover body is attached to the cover body, the number of parts can be reduced and the cost can be reduced.
  Further, the claw member 23a protruding inward from the attachment frame portion 22 is formed over a certain range of one side of the cover body 21 (for example, when the length of one side of the cover body 21 is L1, the claw member 23a is formed by a length L2), and it is possible to reinforce the mounting frame portion 22 as if the mounting frame portion 22 were formed with ribs, thereby preventing the cover body 21 from being deformed or warped. be able to.
  When the cover body 21 is deformed or warped, a gap is formed between the instrument body 11 and the cover body 21 due to the deformation or warpage, and the appearance looks worse, light leakage occurs, or the lighting apparatus 1 Insects may invade inside, but the formation of the claw member 23a makes it possible to prevent such problems from occurring.
[0031]
  Moreover, the fall prevention mechanism 35 comprised by the nail | claw member 23a and the latching member 12 is arrange | positioned in the direction orthogonal to the direction which connects the attachment members 13 * 13 provided in two right and left sides of the instrument main body 11. FIG.
  As a result, as shown in FIG. 6, if the attachment members 13, 13 are removed, the cover body 21 attached to the instrument body 11 can be greatly opened with one side suspended by the locking member 12. Thus, the replacement work of the lamp 31 can be easily performed.
[0032]
  The claw member 23a is a protrusion that protrudes inward in the horizontal direction from the mounting frame portion 22 of the cover body 21, and the locking member 12 includes side guide portions 12a and 12a that are substantially "J" -shaped in side view and these. Is configured by a fall prevention portion 12b that connects the two, and can guide both sides and the lower side of the claw member 23a.
  Therefore, the locking member 12 can not only suspend the cover body 21 but also position the cover body 21 left and right.
  That is, when the cover body 21 is attached to the instrument body 11, the claw member 23a is inserted into the locking member 12, so that the cover body 21 can be positioned in the left-right direction by the side guide portions 12a and 12a. The mounting operation of the cover body 21 can be facilitated.
[0033]
  Since the locking member 12 is formed by bending the linear member to form the side guide portions 12a and 12a and the fall prevention portion 12b, the locking member 12 can be configured easily and inexpensively.
  Further, the side guide portions 12a and 12a are formed in a substantially “J” shape bent outward and the fall prevention portion 12b is disposed outside the side guide portions 12a and 12a. When the instrument body 11 is mounted, the fall prevention portion 12b is positioned below the claw member 23a or the attachment frame portion 22, and the fall of the cover body 21 can be reliably prevented.
[0034]
  As described above, the locking member 12 is provided on one side of the instrument body 11, and the guide member 16 formed of the same member as the locking member 12 has the same posture on the other side facing the one side. Is provided.
  Here, for example, as shown in FIG. 7A, the locking member 12 is provided only on one side of the instrument body 11, and the guide member 16 is provided.ButOtherwise, when the cover body 21 is to be attached to the instrument body 11 in a state of being displaced in the front-rear direction, the cover body 21 is in a state where a part of the attachment members 13 are engaged with the cover body 21. Can be attached to the instrument body 11 (for example, in FIG. 7A, the cover body 21 is shifted to the locking member 12 side, and the right mounting member 13 in FIG. ing.).
  As described above, it is not preferable that the cover body 21 is attached to the instrument main body 11 with some of the attachment members 13 being locked, because the cover body 21 easily falls off the instrument main body 11.
[0035]
  On the other hand, as shown in FIG. 7B, when the guide member 16 is provided as in the case of the present lighting fixture 1, the cover body 21 is attached in a state of being displaced in the front-rear direction with respect to the fixture body 11. In such a case, since the side guide portions 16a and 16a of the guide member 16 are bent inward from the vicinity of the attachment frame portion 22, the guide member 16 comes into contact with the attachment frame portion 22 and the like of the cover body 21, The attachment member 13 does not engage with the cover body 21, and the cover body 21 cannot be attached to the instrument body.
  Therefore, it is possible to prevent the cover body 21 from being attached to the instrument main body 11 in a state in which some of the attachment members 13 are locked and easily fall off.
[0036]
  Further, since the guide member 16 is composed of the same member as the locking member 12 and includes the side guide portions 16a and 16a, the side guide portions 16a are provided on both sides of the claw member 23b as shown in FIG. -It can be guided by 16a.
  Therefore, when the cover body 21 is mounted on the instrument body 11, not only one side of the cover body 21 is guided by the locking member 12, but also the other side of the cover body 21 is guided by the guide member 16. Therefore, the left and right positioning when the cover body 21 is mounted can be reliably and accurately performed.
  Moreover, since the latching member 12 and the guide member 16 can be comprised by a common member, the number of parts can be reduced and cost reduction can be achieved.
[0037]
  Moreover, the cover body 21 comprised with a synthetic resin is obtained by shape | molding a sheet-like synthetic resin as mentioned above. Specifically, as shown in FIG. 8A, the synthetic resin sheet 55 wound up in a roll shape is cut into a predetermined length and softened by applying heat, and then shown in FIG. 8B. As described above, the cover body 21 is formed as shown in FIG.
[0038]
  The synthetic resin sheet 55 that is a synthetic resin material for molding the cover body 21 does not warp very much in the short direction (X direction in FIG. 8A), but in the longitudinal direction (FIG. 8A Warpage may occur in the Y direction).
  This warp also remains in the cover body 21 molded from the synthetic resin sheet 55. For example, when the Y direction of the synthetic resin sheet 55 corresponds to the side where the claw members 23a and 23b of the cover body 21 are formed. Further, warpage in the vertical direction occurs on the side where the claw members 23a and 23b are formed.
[0039]
  When the warp occurs on each side of the cover body 21, the warp occurs between the instrument body 11 and the cover body 21 due to the warp. In some cases, a gap may be formed in the light fixture 1 and the appearance may be deteriorated, light leakage may occur, or insects may enter the lighting apparatus 1.
  In addition, a gap is generated between the cover body 21 and the instrument main body 11 due to the warpage, and the cover receiving member 13a of the attachment member 13 cannot lock the cover body 21. In some cases, it may become impossible to attach to the camera.
  On the other hand, when the warp is generated on the side where the claw members 23a and 23b are formed, there is no obstacle to wearing the cover body 21 in particular.
[0040]
  Moreover, in this lighting fixture 1, the Y direction of the synthetic resin sheet 55 in which warpage is likely to occur corresponds to the side where the claw members 23a and 23b of the cover body 21 are formed. Determines the molding direction.
  That is, the attachment members 13, 13... Are arranged on the side of the cover body 21 corresponding to the X direction (short direction) of the synthetic resin sheet 55, and the claw member 23 a is arranged on the side corresponding to the Y direction (longitudinal direction). -23b is arranged.
  By comprising in this way, the mounting defect to the instrument main body 11 of the cover body 21 reduces, and the cover body 21 will be mounted | worn reliably.
[0041]
  In this embodiment, the locking member 12 on the instrument body side and the claw member 23a on the cover body 21 side, and the guide member 16 on the instrument body side and the claw member 23b on the cover body 21 side are provided.
Are respectively arranged at the left and right center positions of the instrument body 11, and therefore the cover body 21 can be attached with the front-rear direction reversed.
  However, when it is not desirable that the one side of the cover body 21 and the other side are attached in reverse, such as when different characteristics are provided on one side of the cover body 21 and the other side opposite thereto, As shown in FIG. 9, the left and right positions can be shifted from each other on the lighting device 1 including the locking member 12 and the claw member 23 a and the guide member 16 and the claw member 23 b.
[0042]
  In other words, shifting to the left and right positions different from each other means that the arrangement positions in the direction orthogonal to the line connecting the locking member 12 and the claw member 23a and the guide member 16 and the claw member 23b are different from each other. .
  By disposing the left and right positions in this way, the cover body 21 can be mounted only in one direction, and the mounting direction is not mistaken.
[0043]
  In this embodiment, since the attachment frame portion 22 is formed integrally with the main body of the cover body 21, the claw members 23 a and 23 b formed integrally with the attachment frame portion 22 are also formed on the cover body 21. Although it is formed integrally with the main body, the same effects as in this example can be achieved even in the following cases.
  For example, in the case of a cover body in which a decorative wooden frame is attached as a mounting frame portion to a main body made of synthetic resin, a claw member that protrudes inward is integrally formed on the wooden frame, and this wooden The claw member can constitute a fall prevention mechanism.
  In this way, by forming the claw member integrally with the wooden frame, it is not necessary to separately form the claw member to be locked to the locking member 12 of the instrument body 11 with a metal fitting or the like, and the number of parts can be reduced. Cost can be reduced.
[0044]
  Further, as shown in FIG. 10, the above-described locking member 12 is configured to have a short vertical dimension, and the fall prevention portion 12 b is attached to the cover frame 21 with the cover body 21 attached to the instrument body 11. It can also comprise so that it may contact | abut to the lower surface of the part 22 or the nail | claw member 23a.
  In this case, there is no gap between the locking member 12 and the cover body 21 in the state in which the cover body 21 is attached to the instrument main body 11, and the cover body 21 is supported by the locking member 12. It becomes.
  Therefore, even if the side of the cover body 21 where the claw member 23 a is formed is warped, the warpage can be suppressed by the locking member 12, and there is a gap between the instrument body 11 and the cover body 21. Can be prevented.
[0045]
  Further, as shown in FIG. 11, the cover member 21 is supported by the locking member 12 in a state where the cover member 21 is attached to the instrument body 11 with no vertical gap between the locking member 12 and the cover member 21. In this case, the side guide portion 12a of the locking member 12 may be formed in a straight line (substantially “I” shape).
  By adopting such a shape, the locking member 12 can be easily formed, and cost can be reduced.
[0046]
  Moreover, as shown in FIG. 12, the locking member 12 and the guide member 16 described above can be configured to be wide.
  That is, the left and right widths of the locking member 12 and the guide member 16 are extended to the length of one side of the cover body 21, and the side guide portions 12b and 16b of the locking member 12 and the guide member 16 are A side (vertical side in FIG. 12) orthogonal to a side (horizontal side in FIG. 12) where the locking member 12 and the guide member 16 are arranged in the mounting frame portion 22 of the cover body 21 can be guided. I am doing so.
  In this case, the fall prevention portion 12b of the locking member 12 can lock the lower surface of the mounting frame portion 22 of the cover body 21, and the side guide portions 12b and 16b can guide the left and right sides of the mounting frame portion 22. Therefore, unlike the cover body 21 described above, it is not necessary to form the claw members 23a and 23b, and the same cover body as the conventional cover body can be used.
  The locking member 12 and the guide member 16 of the present embodiment are configured by bending a linear member, but are configured by other members such as a plate-like member or a rod-like member made of synthetic resin or the like. You can also
[0047]
  Moreover, as shown in FIG. 13, even when the instrument main body 11 and the cover body 21 are formed in a substantially circular shape in plan view, the locking member 12 and the claw member are formed in the same manner as when formed in a substantially square shape. The fall prevention mechanism 35 comprised by 23a can be provided. Further, the guide member 16 and the claw member 23b may be provided at a position opposite to the fall prevention mechanism 35.
  In the case of the luminaire 1 shown in FIG. 13, the two mounting members 13, 13 are arranged at positions facing each other, and the fall prevention mechanism 35 (the locking member 12 and the claw member 23 a), the guide member 16, and the claw The member 23b is arranged in a direction orthogonal to the line connecting the attachment members 13 and 13. The fall prevention mechanism 35 is arranged between the two attachment members 13.
  Thus, even when the fixture main body 11 and the cover body 21 are substantially circular, the fall prevention mechanism 35 of the present proposal can be provided, and the fall prevention mechanism 35 is applied to the lighting fixture 1 having a wide range of specifications. Is possible.
[0048]
  As shown in FIG. 14, even when the instrument main body 11 and the cover body 21 are formed in a substantially circular shape in plan view, the fall prevention portion 12 b of the locking member 12 is provided with the mounting frame of the cover body 21. The lower surface of the portion 22 can be configured to be locked, and the guide member 16 can be configured to guide the inner peripheral surface of the mounting frame portion 22 of the cover body 21.
  Thus, the fall prevention mechanism 35 is configured and the cover body 21 is positioned with respect to the instrument body 11 while using the same cover body as the conventional cover body without forming the claw members 23a and 23b on the cover body 21. It becomes possible.
  In FIG. 14, the guide member 16 is disposed at a position facing the locking member 12, and the attachment members 13 and 13 are disposed in a direction orthogonal to the direction connecting the locking member 12 and the guide member 16. Yes.
[0049]
  When the cover member 21 is not formed with the claw members 23a and 23b, as shown in FIG. 15, the locking member 12, the guide member 16, and the mounting members 13 and 13 are in phase with each other. It is also possible to arrange them at different positions.
[0050]
【The invention's effect】
  Since the present invention is configured as described above, the following effects can be obtained. In other words, the lighting device is provided with a fall prevention mechanism for preventing a fall of the cover body in which a cover body is attached to the fixture body attached to the ceiling by an attachment member. Mechanism cover bodyIt is formed on the mounting frame part and protrudes inward in the horizontal directionIt is composed of a claw member and a locking member provided on the instrument body and capable of locking the claw member.The mounting members are provided at least in a pair at opposite positions of the instrument body, the locking members are arranged in a direction orthogonal to the direction connecting the pair of mounting members, and the locking members are suspended from the instrument body and It is composed of a side guide portion arranged on both sides, and a fall prevention portion arranged outside the side guide portion and capable of locking the cover body, and at a position facing the arrangement position of the locking member in the instrument body, A guide member for guiding the cover body is provided.So
  The number of parts can be reduced and the cost can be reduced as compared with a case where a claw member formed of a metal fitting or the like formed separately from the cover body is attached to the cover body.
  Further, the claw member protruding inward can reinforce the cover body as if a rib was formed on the cover body, and can prevent deformation of the cover body.
  When the cover body is deformed or warped, a gap is created between the body of the instrument and the cover body due to the deformation or warpage, and the appearance looks worse, light leaks, or insects appear in the lighting equipment. Intrusion may occur, but by forming the claw member, it is possible to prevent such a problem from occurring.
  Further, if the mounting member is removed, the cover body mounted on the instrument body can be greatly opened with one side suspended by the locking member, and the lamp can be easily replaced.
  In addition, the locking member can be configured easily and inexpensively, and when the cover body is attached to the instrument body, the fall prevention part is located below the claw member or the mounting frame part of the cover body, Hippopotamus -The body can be reliably prevented from falling.
  In addition, when the cover body is about to be attached to the instrument body, the guide member comes into contact with the cover body, and the cover body cannot be attached to the instrument body. It is possible to prevent the cover body from being attached to the instrument body in a state in which the cover is easily removed. Further, when the cover body is mounted on the instrument body, not only can one side of the cover body be guided by the locking member, but also the other side of the cover body can be guided by the guide member. Positioning of the left and right at the time of mounting can be performed reliably and accurately.
[0051]
  Furthermore, as described in claim 2,A lighting device having a cover body attached to a fixture body attached to a ceiling by a mounting member and having a fall prevention mechanism for preventing the cover body from falling, wherein the fall prevention mechanism includes an attachment frame portion of the cover body And a locking member that is provided in the instrument main body and can lock the mounting frame portion, and at least a pair of the mounting members are provided at opposing positions of the instrument main body, and the locking members connect the pair of mounting members. The locking member is disposed in a direction perpendicular to the direction, and the locking member includes a pair of side guide portions that are suspended from the instrument body, and a fall prevention portion that is disposed outside the pair of side guide portions and can lock the cover body. And a guide member for guiding the cover body is provided at a position opposite to the arrangement position of the locking member in the instrument body.So
  The number of parts can be reduced and the cost can be reduced as compared with a case where a claw member formed of a metal fitting or the like formed separately from the cover body is attached to the cover body.
  Further, the claw member protruding inward can reinforce the cover body as if a rib was formed on the cover body, and can prevent deformation of the cover body.
  When the cover body is deformed or warped, a gap is created between the body of the instrument and the cover body due to the deformation or warpage, and the appearance looks worse, light leaks, or insects appear in the lighting equipment. Intrusion may occur, but by forming the claw member, it is possible to prevent such a problem from occurring.
  Further, if the mounting member is removed, the cover body mounted on the instrument body can be greatly opened with one side suspended by the locking member, and the lamp can be easily replaced.
  In addition, the locking member can be configured easily and inexpensively, and when the cover body is attached to the instrument body, the fall prevention part is located below the claw member or the mounting frame part of the cover body, The fall of the cover body can be reliably prevented.
  In addition, when the cover body is about to be attached to the instrument body, the guide member comes into contact with the cover body, and the cover body cannot be attached to the instrument body. It is possible to prevent the cover body from being attached to the instrument body in a state in which the cover is easily removed. Further, when the cover body is mounted on the instrument body, not only can one side of the cover body be guided by the locking member, but also the other side of the cover body can be guided by the guide member. Positioning of the left and right at the time of mounting can be performed reliably and accurately.
[0052]
  Furthermore, as described in claim 3,Since the locking member and the guide member are composed of the same member and are arranged in the same posture,
  Since the locking member and the guide member can be formed of a common member, the number of parts can be reduced and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a lighting fixture of the present invention.
FIG. 2 is a side sectional view of the same.
FIG. 3 is a front sectional view of the same.
FIG. 4 is a bottom view of the same.
FIG. 5 is a side view showing a state of the cover body when the cover body is detached from the attachment member.
FIG. 6 is a perspective view showing a state in which the claw member of the cover body is locked to the locking member of the instrument body.
FIG. 7 is a diagram illustrating a difference in the mounting state of the cover body when the guide member is provided and when the guide member is not provided.
FIG. 8 is a diagram showing a state where a cover body is molded from a roll-shaped synthetic resin sheet.
FIG. 9 is a bottom view showing the lighting apparatus in which the arrangement positions of the locking member and the guide member are shifted.
FIG. 10 is a side cross-sectional view showing a locking member configured such that the fall prevention part comes into contact with the cover body in a state where the cover body is attached to the instrument body.
FIG. 11 is a side cross-sectional view showing a locking member in which a side guide portion is formed in a straight line shape (substantially “I” shape).
FIG. 12 is a bottom view showing a lighting fixture in which a locking member and a guide member are configured to be wide.
FIG. 13 is a bottom view showing a lighting fixture in which a fixture body and a cover body are formed in a substantially circular shape in plan view.
FIG. 14 is a bottom view showing a state in which a fall prevention mechanism is configured and a guide member is provided in a lighting fixture in which a fixture body and a cover body are formed in a substantially circular shape in plan view.
FIG. 15 shows a lighting fixture in which the fixture main body and the cover body are formed in a substantially circular shape in plan view. When the fall prevention mechanism is configured and the guide member is provided, the fall prevention mechanism, the guide member, and the mounting member are arranged. It is a bottom view which shows the state arrange | positioned according to a mutual phase.
[Explanation of symbols]
  1 lighting equipment
  11 Instrument body
  12 Locking member
  12a Side guide part
  12b Fall prevention part
  13 Mounting member
  13b Cover receiving member
  16 Guide member
  16a Side guide part
  16b connecting part
  21 Cover body
  22 Mounting frame
  23a / 23b Claw member
  35 Fall prevention mechanism
  55 Synthetic resin sheet

Claims

A lighting fixture having a fall prevention mechanism for preventing a fall of the cover body, the cover body being attached to the fixture body attached to the ceiling by an attachment member,
The fall prevention mechanism is formed of a claw member that is formed on the attachment frame portion of the cover body and protrudes inward in the horizontal direction, and a locking member that is provided on the instrument body and can lock the claw member .
At least a pair of the attachment members are provided at opposing positions of the instrument body,
The locking member is disposed in a direction orthogonal to the direction connecting the pair of attachment members,
The locking member is composed of a side guide portion that is suspended from the instrument body and disposed on both sides of the claw member, and a fall prevention portion that is disposed outside the side guide portion and can lock the cover body.
A guide member for guiding the cover body is provided at a position opposite to the arrangement position of the locking member in the instrument body.
A lighting apparatus characterized by that.

A lighting fixture having a fall prevention mechanism for preventing a fall of the cover body, the cover body being attached to the fixture body attached to the ceiling by an attachment member,
The fall prevention mechanism is composed of an attachment frame portion of the cover body and a locking member that is provided in the instrument body and can lock the attachment frame portion,
At least a pair of the attachment members are provided at opposing positions of the instrument body,
The locking member is disposed in a direction orthogonal to the direction connecting the pair of attachment members,
The locking member is composed of a pair of side guide portions depending from the instrument body, and a fall prevention portion that is disposed outside the pair of side guide portions and can lock the cover body.
A guide member for guiding the cover body is provided at a position opposite to the arrangement position of the locking member in the instrument body.
A lighting apparatus characterized by that.

The locking member and the guide member are composed of the same member and are arranged in the same posture.
The lighting fixture according to claim 1 or claim 2 , wherein