JP3858322B2

JP3858322B2 - Recessed ceiling lighting fixture

Info

Publication number: JP3858322B2
Application number: JP34417696A
Authority: JP
Inventors: 裕之渡邉
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 1996-12-24
Filing date: 1996-12-24
Publication date: 2006-12-13
Anticipated expiration: 2016-12-24
Also published as: JPH10188651A

Description

【０００１】
【発明の属する技術分野】
本発明は、直管型の蛍光ランプを光源として用い、天井壁に設けた器具装着用開口に埋め込んで取付けられる天井埋め込み型照明器具に関する。
【０００２】
【従来の技術】
図６および図７は一般的に多用されている２灯用天井埋め込み型照明器具を示しており、これらの図中１は器具本体、２は複数の反射板取付け金具、３は板金製の反射板、４は複数の取付けねじである。
【０００３】
図示しない点灯装置やスイッチ等の電気部品が内蔵される器具本体１の下面は開放されており、また、この本体１の長手方向両端部には夫々ランプソケット５が２個ずつ取付けられている。反射板取付け金具２は器具本体１の長手方向両端側に夫々連結して設けられる。これら取付け金具２は略コの状をなしており、その両端の側方に張出した係合端２ａは、天井壁６に開けられた器具装着用開口６ａ（なお、その長手方向と直交する開口幅は通常 300mmと幅広である。）の縁部に下側から引っ掛けられるようになっている。
【０００４】
反射板３は、水平な天板部７の両側に斜板部８を夫々斜め下方に折曲げてなる反射板主部９を備え、この主部９の長手方向両端に夫々端板１０を取付けてなる。そして、天板部７の両端部には、その幅方向に並んで夫々二つのソケット通孔１１が開けられているとともに、二つのねじ通孔１２が開けられている。複数の取付けねじ４は、各ねじ通孔１２を個別に通って反射板取付け金具２に設けられた一対のねじ孔１３のいずれかに螺合され、その締付けによって反射板３を反射板取付け金具２にねじ止めする。
【０００５】
このねじ止めに伴って斜板部８および端板１０の下端から側方に張出して互いに連続された環状の縁部３ａが、器具装着用開口６ａの縁部に下方から押し当てられて、器具装着用開口６ａの縁部を覆い隠すようになっている。また、図６および図７中１５はランプソケット５に支持されて反射板３の内側に収容される直管型蛍光ランプである。これらのランプ１５の真上に取付けねじ４が配置されるようになっている。
【０００６】
また、図８および図９は、図６および図７に示された従来公知の照明器具に対する改良案として本発明者が提案したものであり、この提案に係る天井埋め込み型照明器具は、各反射板取付け金具２に対して夫々１本の取付けねじ４を螺合することによって、反射板３を取付けるようにしている。なお、この点以外の構成は前記図６および図７に示された従来の照明器具と同じであり、同一構成部分には同一符号を付してある。
【０００７】
【発明が解決しようとする課題】
図６および図７に示された従来の天井埋め込み型照明器具においては、反射板３を取付けるに当たり、合計４本の取付けねじ４を必要としているので、その取付けに手間が掛かるという問題がある。
【０００８】
そこで、取付けねじ４が２本で済むようにした図８および図９の天井埋め込み型照明器具が提案された。しかし、この提案においては反射板３の水平な天板部７の幅方向中央において取付けねじ４を締め付けてねじ止めをすることに伴い、器具装着用開口６ａと同様に幅が広い天板部７が、図８に示すように上方へ凸となるように反って湾曲し、その反作用として斜板部８から張出した縁部３ａが垂れ下がって、天井壁６との間に隙間Ｇを発生して取付け姿勢での外観を損ない易いという不具合を生じることが分かった。
【０００９】
こうした反射板３の縁部３ａの垂れ下がりは、反射板３の厚みを厚くすれば防止できる。しかし、そのようにした場合には、反射板３の材料コストが増すとともに、反射板３の重量が重くなって、その取扱いに不便を来すから、実際上の対策としては好ましくない。
【００１０】
また、以上は２灯用の例で説明したが、１灯用の天井埋め込み型照明器具において、その反射板の取付けを２本の取付けねじで済むようにして、反射板の材厚を薄くした場合には、前記と同様に反射板の下縁に垂れ下がりを生じるので、前記の改良案と同様な問題がある。
【００１１】
したがって、本発明が解決しようとする課題は、反射板の縁部の垂れ下がりを防止しつつ反射板取付け金具への反射板の取付け作業性を向上できる天井埋め込み型照明器具を得ることにある。
【００１２】
【課題を解決するための手段】
請求項１の発明は、長手方向両端に取付けられたランプソケットを有する器具本体と、この本体に取付けられる複数の反射板取付け金具と、前記器具本体を下方から覆い隠す天板部の両側に斜板部を斜め下方に折り曲げた反射板主部の長手方向両端に夫々端板を取付けてなるとともに、天井の器具装着開口の縁部に下面側から引掛かる開口縁を有し、かつ、前記天板部を前記反射板取付け金具に非接触にして配置される反射板と、前記天板部を通って前記反射板取付け金具に前記反射板を取付ける複数の取付けねじと、具備した天井埋め込み型照明器具を前提とする。
【００１３】
そして、前記課題を解決するために、前記反射板の天板部を、前記斜板部の上端から前記天板部の幅方向中央部が最低位部となるように前記中央部に向けて次第に下方に傾斜する断面略Ｖ状の折曲げ構造とし、前記最低位部により形成されて前記天板部の長手方向に延びる下向きの稜線部にねじ通孔を前記反射板取付け金具と同数設け、これらねじ通孔に前記取付けねじを通して前記反射板取付け金具に前記反射板をねじ止めし、ねじ止めされた状態で前記稜線部が、前記斜板部の上端より下方で、かつ、前記ランプソケットに支持されるランプよりも上方に配置されていることを特徴としている。
【００１４】
この請求項１の発明においては、反射板を反射板取付け金具にねじ止めする取付けねじの使用を、一個の反射板取付け金具一つにつき１本としたから、その使用数を最少とでき、取付けの手間を少なくできる。そして、反射板の天板部は折曲げ構造であるから上向きの変形に対して強く、この天板部に設けられた長手方向に延びる下向きの稜線部に取付けねじを通して反射板をねじ止めするようにしたから、取付けねじの締め付けに伴って天板部が上側に凸となるように反ることを防止できる。
【００１５】
【発明の実施の形態】
以下、図１〜図４を参照して本発明の第１の実施の形態に係る40ワット２灯用の天井埋め込み型照明器具を説明する。
【００１６】
図２中２１は天井壁であり、２１ａは器具装着用開口である。この開口２１ａは天井埋め込み型照明器具が一台の場合には、その大きさに合わせて天井壁２１に設けられ、また、複数台の照明器具がその長手方向に直線的に連続して設置される場合には、その並び台数に合わせて連続して天井壁２１に設けられる。
【００１７】
この器具装着用開口２１ａに挿入して天井に埋め込んで設置される天井埋め込み型照明器具（以下、単に照明器具と略称する。）は、図１および図４等に示されるように器具本体２２と、複数例えば二つの反射板取付け金具２３と、反射板２４と、前記金具２３と同数の取付けねじ２５と、二本の直管型蛍光ランプ２６とを備えている。
【００１８】
板金製の器具本体２２は下面が開放された細長い箱形状をなし、その内部には、図３に示されるように放電灯安定器３１および電源端子台３２等の電気部品が内蔵されている。この器具本体２２には図４等に示されるように長手方向両端に位置してランプソケット３３が夫々に二個ずつ図示しないソケット取付け金具を介して取付けられている。
【００１９】
器具本体２２の上板壁には図３に示されるように電源引込み孔３４と、これを間に置いて器具取付け孔３５が夫々複数開けられている。器具本体２２は、前記複数の器具取付け孔３５の中から選択された器具取付け孔３５に通される天井裏の吊りボルト（図示しない）の先端部に、器具本体２２の内側からナットを螺合して締め付けることにより、天井に取付けられるようになっている。
【００２０】
図２および図４等に示されるように反射板取付け金具２３は、器具本体２２の開放された下面を幅方向に横断する横断板部４１と、この両端から下方へ折り曲げられるとともに先端に側方に張出す係合端４２ａを有した係合部４２とを有している。横断板部４１は器具本体２２の幅よりも長い。しかも、この横断板部４１の長手方向中央部には一つのねじ孔４３が設けられている。この反射板取付け金具２３は器具本体２２の例えば長手方向両端側部分に連結されている。この連結は、図２に示されるように左右に対をなして横断板部４１に形成した連結爪４１ａを、器具本体２２の相対向する側壁に設けた図示しない連結孔に引掛けることによって実現されている。こうした取付けにより、前記ねじ孔４３が器具本体２２の幅方向中央に対応して配置されるようになっている。
【００２１】
反射板２４は板金製である。この反射板２４は、図２および図４等に示されるように反射板主部５１の長手方向両端に夫々端板５２を取付けて形成されている。反射板主部５１は、器具本体２２よりも幅が広く、この本体２２を下方から覆い隠す天板部５３の両側に、斜板部５４をハの字状をなして斜め下方に折り曲げてなる。
【００２２】
図２等に示されるように天板部５３は、その幅方向中央部が最低位部となるように前記中央部に向けて次第に下方に傾斜する断面略Ｖ状の折曲げ構造により形成されている。したがって、天板部５３は、その幅方向中央部に、前記最低位部からなる下向きの稜線部５３ａを有している。この一本の稜線部５３ａは天板部５３の長手方向に延びている。そして、稜線部５３ａには前記ねじ孔４３に対応して一つのねじ通孔５５が開けられている。
【００２３】
天板部５３の長手方向両端には、その幅方向に並んで前記ランプソケット３３が下方に挿通するソケット通孔５６が設けられている。前記斜板部５４の下端および端板５２の下端は、夫々外側に張り出すように折り曲げられるとともに互いに連結されて、反射板２４の環状をなす開口縁２４ａを形成している。この開口縁２４ａは前記係合端４２ａを覆い隠すとともに、器具装着用開口２１ａの縁部にその下面側から押し当てられるようになっている。
【００２４】
２本の取付けねじ２５には手回しが可能な化粧ねじが採用され、これはねじ通孔５５を通って前記ねじ孔４３に挿脱可能に螺合される。これらのねじ２５の締め付けにより反射板２４が取付けられるようになっている。
【００２５】
また、蛍光ランプ２６は、ソケット通孔５６を下方に挿通したランプソケット３３に両端を支持されて、図１に示されるように反射板２４の内側に収容される。
【００２６】
前記構成の照明器具は次の手順で天井に埋め込み固定される。
【００２７】
まず、一対の反射板取付け金具２３が予め連結された器具本体２２を器具装着用開口２１ａに挿入するとともに、選択された器具取付け孔３５に天井裏の図示しない吊りボルトを下方に挿通させた後、このボルトの下端部に図示しないナットを螺合して締め付ける。それにより、反射板取付け金具２３の係合端４２ａが器具装着用開口２１ａの縁部に下面側から引掛かって、器具本体２２が天井に埋め込まれる。次に、器具装着用開口２１ａにこれを覆い隠すように反射板２４を挿入して、その開口縁２４ａを器具装着用開口２１ａの縁部に下面側から引掛ける。この後、二本の取付けねじ２５を夫々ねじ通孔５５に通し、ねじ孔４３に螺合して締め上げる。それにより、反射板２４が天井に埋め込み状態に取付けられる。最後に、反射板２４のソケット通孔５６から突出したランプソケット３３に蛍光ランプ２６を支持させる。以上の手順により照明器具が天井に埋め込み固定されるものである。
【００２８】
こうした手順から分かるように、この照明器具は反射板２４を反射板取付け金具２３に取付けるに当たり、これら金具２３と同数、この実施の形態では二本の取付けねじ２５しか必要としないので、その使用数を最少にできる。それに応じて、反射板２４の取付けに要する手間が少なくなるので、その作業性がよく、この照明器具を天井に対して容易に埋め込み固定することができる。
【００２９】
そして、前記反射板２４のねじ止めにおいて、取付けねじ２５が挿通する天板部５３は、水平ではなく、その幅方向中央位置に長手方向に延びる下向きの稜線部５３ａを有しているから、上向きの変形に対して強度が高い。そのため、取付けねじ２５の前記締め上げに拘らず、天板部５３が上方に凸となるように反ることを防止できる。
【００３０】
このように反り変形がないことにより、反射板２４の斜板部５４の下端、言い換えれば、反射板２４の開口縁２４ａが垂れ下がることがない。したがって、開口縁２４ａを天井壁２１の下面に強く押し当て、これら相互間に隙間を設けることなく密接でき、この照明器具を天井に良好な取付け姿勢をもって設置できる。
【００３１】
しかも、こうした理由から反射板２４を板厚を薄くすることが可能であり、反射板２４ひいては照明器具の低コストに貢献できるとともに、反射板２４の軽量化により、その天井への埋め込み固定などにおける取扱いを容易にできる。
【００３２】
なお、本発明は前記第１の実施の形態に制約されず、図５に示される１灯用の天井埋め込み型照明器具にも適用できるとともに、図示しないが３灯以上の照明器具にも適用できる。
【００３３】
図５の照明器具においては、その器具本体２２の形状が細長い直方体でかつ下面が開放された構造であり、また、２本の取付けねじ２５が蛍光ランプ２６の真上に位置されて下方から視認しずらくなっている点以外は、前記第１の実施の形態に係る照明器具と同様の構成であり、図中第１の実施の形態の照明器具と同様な構成については同じ符号を付してある。そして、この第２の実施の形態においても、反射板２４の天板部５４に下向きの稜線部５３ａを設け、そこを通る２本の取付けねじ２５で反射板２４を反射板取付け金具２３に取付ける構成により、前記第１の実施の形態の照明器具と同様な作用を得ることができ、したがって、反射板２４を薄く軽量化できるとともに、それにも拘らず天板部５４の反り変形を防止して、天井壁２１との間に隙間を形成することなく容易に反射板２４を取付けることができる。
【００３４】
【発明の効果】
以上詳記したように本発明によれば、反射板を反射板取付け金具にねじ止めする取付けねじの使用数が少なく、反射板取付け金具への反射板の取付け作業性を向上できるとともに、取付けねじの締め付けに伴って天板部が上側に凸となるように反ることを防止して、反射板の縁部の垂れ下がりを防止できる。したがって、反射板の縁部を天井壁に密接させて天井に対して簡単な手間で埋め込み設置することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係る２灯用天井埋め込み型照明器具の構成を示す斜視図。
【図２】第１の実施の形態に係る照明器具の構成を図１中矢印Ｚ方向から見て一部断面して示す図。
【図３】第１の実施の形態に係る照明器具の構成を示す平面図。
【図４】第１の実施の形態に係る照明器具の構成を分解して示す斜視図。
【図５】本発明の第２の実施の形態に係る１灯用天井埋め込み型照明器具の構成を示す前記図２相当図。
【図６】従来例に係る２灯用天井埋め込み型照明器具の構成を示す前記図２相当図。
【図７】図６に示した従来の照明器具の構成を分解して示す斜視図。
【図８】改良案として提案された２灯用天井埋め込み型照明器具の構成を示す前記図２相当図。
【図９】図８に示した照明器具の構成を分解して示す斜視図。
【符号の説明】
２１…天井壁、２１ａ…器具装着用開口、２２…器具本体、２３…反射板取付け金具、２３ａ…反射板取付け金具の係合端、２４…反射板、２４ａ…開口縁、２５…取付けねじ、２６…蛍光ランプ、３３…ランプソケット、４３…ねじ孔、５１…反射板主部、５２…端板、５３…天板部、５３ａ…稜線部、５４…斜板部、５５…ねじ通孔。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceiling-embedded lighting fixture that uses a straight tube type fluorescent lamp as a light source and is embedded in a fixture mounting opening provided on a ceiling wall.
[0002]
[Prior art]
FIGS. 6 and 7 show commonly used ceiling-mounted lighting fixtures for two lamps. In these drawings, 1 is a fixture body, 2 is a plurality of reflector mounting brackets, and 3 is a reflection made of sheet metal. The plates 4 are a plurality of mounting screws.
[0003]
The lower surface of the appliance main body 1 in which electric parts such as a lighting device and a switch (not shown) are incorporated is opened, and two lamp sockets 5 are attached to both ends of the main body 1 in the longitudinal direction. The reflector plate fittings 2 are provided so as to be connected to both ends of the instrument body 1 in the longitudinal direction. These mounting brackets 2 are substantially U-shaped, and the engagement ends 2a projecting laterally at both ends thereof are appliance mounting openings 6a opened in the ceiling wall 6 (in addition, openings perpendicular to the longitudinal direction thereof). The width is usually 300mm, which is wide).
[0004]
The reflection plate 3 includes a reflection plate main portion 9 formed by bending a swash plate portion 8 obliquely downward on both sides of the horizontal top plate portion 7, and end plates 10 are attached to both ends of the main portion 9 in the longitudinal direction. It becomes. In addition, two socket through holes 11 and two screw through holes 12 are formed in both end portions of the top plate portion 7 so as to be aligned in the width direction. The plurality of mounting screws 4 are individually screwed into one of a pair of screw holes 13 provided in the reflector mounting bracket 2 through each screw through-hole 12, and the reflector 3 is attached to the reflector mounting bracket by tightening the screws. Screw to 2.
[0005]
Along with this screwing, an annular edge 3a extending laterally from the lower ends of the swash plate portion 8 and the end plate 10 and continuing to each other is pressed against the edge of the device mounting opening 6a from below, The edge of the mounting opening 6a is obscured. 6 and 7, reference numeral 15 denotes a straight tube fluorescent lamp supported by the lamp socket 5 and accommodated inside the reflector 3. A mounting screw 4 is arranged directly above these lamps 15 .
[0006]
FIGS. 8 and 9 are proposed by the present inventor as an improvement plan for the conventionally known lighting fixtures shown in FIGS. 6 and 7, and the ceiling-embedded lighting fixture according to this proposal has each reflection. The reflection plate 3 is attached by screwing one attachment screw 4 to the plate attachment fitting 2. The configuration other than this point is the same as that of the conventional lighting apparatus shown in FIGS. 6 and 7, and the same components are denoted by the same reference numerals.
[0007]
[Problems to be solved by the invention]
In the conventional ceiling-embedded lighting fixture shown in FIGS. 6 and 7, a total of four mounting screws 4 are required to attach the reflecting plate 3, so that there is a problem that the mounting takes time.
[0008]
Therefore, the ceiling-embedded lighting fixture of FIGS. 8 and 9 in which only two mounting screws 4 are required has been proposed. However, in this proposal, as the mounting screw 4 is tightened and screwed at the center in the width direction of the horizontal top plate portion 7 of the reflector 3, the top plate portion 7 having a wide width similar to the instrument mounting opening 6a. However, as shown in FIG. 8, it is curved so as to be convex upward, and as a reaction, the edge 3 a protruding from the swash plate portion 8 hangs down, and a gap G is generated between the ceiling wall 6. It turned out that the malfunction that the external appearance in an attachment attitude | position tends to be impaired is produced.
[0009]
Such sagging of the edge 3a of the reflecting plate 3 can be prevented by increasing the thickness of the reflecting plate 3. However, in such a case, the material cost of the reflecting plate 3 is increased, and the weight of the reflecting plate 3 is increased, resulting in inconvenience in handling.
[0010]
Further, the above has been described with reference to the case of two lamps. However, in the case of a single-ceiling embedded lighting fixture, when the thickness of the reflector is reduced by attaching the reflector with two mounting screws. Has a problem similar to the above-mentioned improvement because the bottom edge of the reflecting plate hangs down as described above.
[0011]
Therefore, the problem to be solved by the present invention is to obtain a ceiling-embedded lighting fixture that can improve the workability of attaching the reflector to the reflector fitting while preventing the edge of the reflector from sagging.
[0012]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an appliance main body having lamp sockets attached to both ends in the longitudinal direction, a plurality of reflector mounting brackets attached to the main body, and a top plate portion that covers the appliance main body from below. End plates are attached to both ends in the longitudinal direction of the reflector main part, which is bent diagonally downward , and has an opening edge that hooks from the lower surface side to the edge of the fixture mounting opening on the ceiling, and the ceiling A reflecting plate disposed without contacting the reflecting plate mounting bracket with the plate portion, a plurality of mounting screws for attaching the reflecting plate to the reflecting plate mounting bracket through the top plate portion, and an embedded ceiling illumination Assume equipment.
[0013]
In order to solve the problem, the top plate portion of the reflecting plate is gradually moved from the upper end of the swash plate portion toward the central portion so that the central portion in the width direction of the top plate portion becomes the lowest position portion. A bent structure having a substantially V-shaped cross section inclined downward, and the same number of screw-through holes as the reflector mounting brackets are provided in the downward ridge line portion formed by the lowest portion and extending in the longitudinal direction of the top plate portion. The reflection plate is screwed to the reflection plate mounting bracket through the attachment screw through the screw hole, and the ridge line portion is supported by the lamp socket below the upper end of the swash plate portion in the screwed state. It is characterized by being arranged above the lamp to be used .
[0014]
In the first aspect of the present invention, since the number of mounting screws for screwing the reflecting plate to the reflecting plate mounting bracket is set to one for each reflecting plate mounting bracket, the number of the mounting plates can be minimized. Can be reduced. And since the top plate portion of the reflector plate is a bent structure, it is strong against upward deformation, and the reflector plate is screwed through a mounting screw to a downward ridge line portion extending in the longitudinal direction provided on the top plate portion. Therefore, it is possible to prevent the top plate portion from warping so as to protrude upward as the mounting screw is tightened.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The ceiling-embedded lighting fixture for 40 watts and two lights according to the first embodiment of the present invention will be described below with reference to FIGS.
[0016]
In FIG. 2, 21 is a ceiling wall, and 21a is an opening for mounting an appliance. When there is one ceiling-embedded lighting fixture, the opening 21a is provided on the ceiling wall 21 according to its size, and a plurality of lighting fixtures are installed linearly and continuously in the longitudinal direction. Are provided continuously on the ceiling wall 21 in accordance with the number of units arranged.
[0017]
A ceiling-embedded lighting fixture (hereinafter simply referred to as a lighting fixture) that is inserted into the fixture mounting opening 21a and embedded in the ceiling is hereinafter referred to as a fixture main body 22 as shown in FIGS. A plurality of, for example, two reflector mounting brackets 23, a reflector 24, the same number of mounting screws 25 as the bracket 23, and two straight tube fluorescent lamps 26 are provided.
[0018]
The sheet metal fixture main body 22 has a long and narrow box shape with an open lower surface, in which electric components such as a discharge lamp ballast 31 and a power terminal block 32 are incorporated, as shown in FIG. As shown in FIG. 4 and the like, two lamp sockets 33 are attached to the appliance main body 22 at both ends in the longitudinal direction, respectively, via socket mounting brackets (not shown).
[0019]
As shown in FIG. 3, a plurality of power supply drawing holes 34 and a plurality of tool mounting holes 35 are formed in the upper plate wall of the tool main body 22 with the power supply hole 34 therebetween. The instrument body 22 is screwed with a nut from the inside of the instrument body 22 to the tip of a suspension bolt (not shown) on the back of the ceiling that is passed through the instrument attachment hole 35 selected from the plurality of instrument attachment holes 35. Then, it can be attached to the ceiling by tightening.
[0020]
As shown in FIG. 2 and FIG. 4 and the like, the reflector mounting bracket 23 includes a transverse plate portion 41 that crosses the open lower surface of the instrument body 22 in the width direction, and is bent downward from both ends and laterally at the tip. And an engaging portion 42 having an engaging end 42a projecting over. The transverse plate portion 41 is longer than the width of the instrument body 22. In addition, a single screw hole 43 is provided in the central portion of the transverse plate portion 41 in the longitudinal direction. The reflector mounting bracket 23 is connected to, for example, both ends of the instrument body 22 in the longitudinal direction. This connection is realized by hooking connection claws 41a formed on the transverse plate portion 41 in pairs on the left and right sides as shown in FIG. 2 to connection holes (not shown) provided on opposite side walls of the instrument body 22. Has been. With such attachment, the screw hole 43 is arranged corresponding to the center of the instrument body 22 in the width direction.
[0021]
The reflector 24 is made of sheet metal. The reflecting plate 24 is formed by attaching end plates 52 to both ends in the longitudinal direction of the reflecting plate main portion 51 as shown in FIGS. The reflector main portion 51 is wider than the instrument main body 22 and is formed by bending the swash plate portion 54 diagonally downwards on both sides of the top plate portion 53 that covers the main body 22 from below. .
[0022]
As shown in FIG. 2 and the like, the top plate portion 53 is formed by a bending structure having a substantially V-shaped cross section that is gradually inclined downward toward the central portion so that the central portion in the width direction becomes the lowest portion. Yes. Therefore, the top plate portion 53 has a downward ridge line portion 53a composed of the lowest portion at the center portion in the width direction. The single ridge line portion 53 a extends in the longitudinal direction of the top plate portion 53. The ridge line portion 53 a is formed with one screw through hole 55 corresponding to the screw hole 43.
[0023]
At both ends of the top plate portion 53 in the longitudinal direction, socket through holes 56 through which the lamp socket 33 is inserted downward are provided side by side in the width direction. The lower end of the swash plate portion 54 and the lower end of the end plate 52 are bent so as to project outward and are connected to each other to form an opening edge 24 a forming an annular shape of the reflection plate 24. The opening edge 24a covers the engagement end 42a and is pressed against the edge of the instrument mounting opening 21a from the lower surface side.
[0024]
The two mounting screws 25 employ decorative screws that can be turned by hand, and are screwed into the screw holes 43 through the screw holes 55 so as to be detachable. The reflector 24 is attached by tightening these screws 25.
[0025]
Further, both ends of the fluorescent lamp 26 are supported by a lamp socket 33 inserted downward through the socket through hole 56, and are accommodated inside the reflector 24 as shown in FIG.
[0026]
The lighting fixture having the above configuration is embedded and fixed in the ceiling by the following procedure.
[0027]
First, after the instrument body 22 to which the pair of reflector mounting brackets 23 are connected in advance is inserted into the instrument mounting opening 21a, a suspension bolt (not shown) on the back of the ceiling is inserted downward into the selected instrument mounting hole 35. Then, a nut (not shown) is screwed to the lower end of the bolt and tightened. Thereby, the engagement end 42a of the reflector mounting bracket 23 is hooked from the lower surface side to the edge of the instrument mounting opening 21a , and the instrument body 22 is embedded in the ceiling. Next, the reflecting plate 24 is inserted so as to cover the instrument mounting opening 21a, and the opening edge 24a is hooked on the edge of the instrument mounting opening 21a from the lower surface side. Thereafter, the two mounting screws 25 are respectively passed through the screw through holes 55 and screwed into the screw holes 43 to be tightened. Thereby, the reflecting plate 24 is attached to the ceiling in an embedded state. Finally, the fluorescent lamp 26 is supported by the lamp socket 33 protruding from the socket through hole 56 of the reflecting plate 24. The lighting fixture is embedded and fixed in the ceiling by the above procedure.
[0028]
As can be seen from these procedures, since this luminaire requires only the same number of the fixtures 23 and two mounting screws 25 in this embodiment when attaching the reflectors 24 to the reflector attachment fittings 23, the number of use thereof Can be minimized. Accordingly, the labor required for mounting the reflector 24 is reduced, so that the workability is good and the lighting apparatus can be easily embedded and fixed to the ceiling.
[0029]
In the screwing of the reflection plate 24, the top plate portion 53 through which the mounting screw 25 is inserted is not horizontal, and has a downward ridge line portion 53a extending in the longitudinal direction at the center position in the width direction. High strength against deformation. Therefore, regardless of the tightening of the mounting screw 25, the top plate portion 53 can be prevented from warping so as to protrude upward.
[0030]
Since there is no warping deformation in this way, the lower end of the swash plate portion 54 of the reflecting plate 24, in other words, the opening edge 24a of the reflecting plate 24 does not hang down. Therefore, the opening edge 24a can be strongly pressed against the lower surface of the ceiling wall 21 and can be in close contact with each other without providing a gap between them, and this lighting apparatus can be installed on the ceiling with a good mounting posture.
[0031]
In addition, for this reason, it is possible to reduce the thickness of the reflecting plate 24 and contribute to the low cost of the reflecting plate 24 and thus the lighting fixture. Easy handling.
[0032]
The present invention is not limited to the first embodiment, and can be applied to the single-ceiling embedded lighting fixture shown in FIG. 5 and can also be applied to three or more lighting fixtures (not shown). .
[0033]
The lighting fixture of FIG. 5 has a structure in which the shape of the fixture main body 22 is an elongated rectangular parallelepiped and the lower surface is opened, and two mounting screws 25 are positioned directly above the fluorescent lamp 26 and viewed from below. The configuration is the same as that of the lighting fixture according to the first embodiment except that the lighting fixture is difficult, and the same reference numerals are given to the same configuration as the lighting fixture of the first embodiment in the figure. It is. Also in this second embodiment, a downward ridge line portion 53a is provided on the top plate portion 54 of the reflecting plate 24, and the reflecting plate 24 is attached to the reflecting plate mounting bracket 23 with two mounting screws 25 passing therethrough. According to the configuration, it is possible to obtain the same operation as that of the lighting apparatus of the first embodiment. Therefore, the reflector 24 can be made thin and light, and nevertheless, the warp deformation of the top plate portion 54 can be prevented. The reflecting plate 24 can be easily attached without forming a gap between the ceiling wall 21 and the ceiling wall 21.
[0034]
【The invention's effect】
As described above in detail, according to the present invention, the number of mounting screws for screwing the reflecting plate to the reflecting plate mounting bracket is small, and the mounting workability of the reflecting plate to the reflecting plate mounting bracket can be improved. It is possible to prevent the top plate portion from warping so as to protrude upward with the tightening of the plate, and to prevent the edge of the reflecting plate from drooping. Therefore, it is possible to embed and install the reflector with a simple effort with respect to the ceiling by bringing the edge of the reflector into close contact with the ceiling wall.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a two-lamp ceiling-embedded lighting fixture according to a first embodiment of the present invention.
2 is a cross-sectional view showing a configuration of the lighting apparatus according to the first embodiment when viewed from the direction of arrow Z in FIG. 1. FIG.
FIG. 3 is a plan view showing a configuration of a lighting apparatus according to the first embodiment.
FIG. 4 is an exploded perspective view showing the configuration of the lighting apparatus according to the first embodiment.
FIG. 5 is a view corresponding to FIG. 2 showing a configuration of a single-ceiling embedded lighting fixture according to the second embodiment of the present invention.
FIG. 6 is a view corresponding to FIG. 2 showing a configuration of a two-lamp ceiling-embedded lighting fixture according to a conventional example.
7 is an exploded perspective view showing the configuration of the conventional lighting apparatus shown in FIG. 6. FIG.
FIG. 8 is a view corresponding to FIG. 2 showing the configuration of a two-ceiling embedded lighting fixture proposed as an improvement plan.
9 is an exploded perspective view showing the configuration of the lighting apparatus shown in FIG. 8. FIG.
[Explanation of symbols]
21: Ceiling wall, 21a: Instrument mounting opening, 22: Instrument body, 23: Reflector mounting bracket, 23a: Engaging end of reflector mounting bracket, 24: Reflector, 24a: Opening edge, 25: Mounting screw, 26 ... Fluorescent lamp, 33 ... Lamp socket, 43 ... Screw hole, 51 ... Reflector main part, 52 ... End plate, 53 ... Top plate part, 53a ... Ridge line part, 54 ... Swash plate part, 55 ... Screw hole.

Claims

An instrument body having lamp sockets attached to both longitudinal ends ;
A plurality of reflector mounting brackets attached to the main body;
End plates are attached to both ends in the longitudinal direction of the main part of the reflector plate, in which the swash plate portion is folded obliquely downward on both sides of the top plate portion that covers the fixture body from below, and at the edge of the fixture mounting opening on the ceiling. A reflecting plate having an opening edge hooked from the lower surface side, and the top plate portion being arranged in non-contact with the reflecting plate mounting bracket ;
A plurality of mounting screws for attaching the reflecting plate to the reflecting plate mounting bracket through the top plate portion;
In the ceiling-mounted lighting fixture comprising
The top plate portion of the reflecting plate is folded in a substantially V-shaped cross section that is gradually inclined downward from the upper end of the swash plate portion toward the center portion so that the center portion in the width direction of the top plate portion becomes the lowest position portion. A bent structure is provided, and the same number of screw holes are provided in the downward ridge line portion formed by the lowest portion and extending in the longitudinal direction of the top plate portion as the reflector mounting bracket, and the reflection is made through the attachment screws in these screw holes. The reflection plate is screwed to a plate mounting bracket, and the ridge line portion is disposed below the upper end of the swash plate portion and above the lamp supported by the lamp socket in the screwed state. ceiling luminaires, characterized in that there.