JP3854432B2

JP3854432B2 - lighting equipment

Info

Publication number: JP3854432B2
Application number: JP22813899A
Authority: JP
Inventors: 和弘松井; 和伸有川; 智太田
Original assignee: 株式会社くろがね工作所
Priority date: 1999-08-12
Filing date: 1999-08-12
Publication date: 2006-12-06
Anticipated expiration: 2019-08-12
Also published as: JP2001052524A

Description

【０００１】
【発明の属する技術分野】
本発明は、照明器具に係り、例えば、デスク等の家具に装着することにより使用される照明器具に関する。
【０００２】
【従来の技術】
デスク用の照明器具としては、デスクに固定される支柱の上端から屈折して水平方向に延びるアームを設け、該アームの先端に照明体を取付けたものが公知である。通常、デスクの天板を照らす光の照射方向を変更自在とするため、照明体は、アーム軸線に交差する鉛直軸回りの旋回方向Ｘと、アーム軸線に交差する水平軸回りの首振り方向Ｙに姿勢変更自在となるように構成されている。
【０００３】
【発明が解決しようとする課題】
従来技術は、旋回方向Ｘを規定する鉛直軸と、首振り方向Ｙを規定する水平軸が、何れも軸部材により形成され、旋回方向Ｘと首振り方向Ｙの回動を独立して行わしめる構成であるため、照明体の姿勢を変更する際、選択できる姿勢に制約を受ける。
【０００４】
そこで、照明体の姿勢変更の多様化を図るためには、前記の鉛直軸と水平軸に加えて、アーム軸線の延長軸回りのねじり方向Ｚの姿勢変更を可能とする軸部材を追加すれば良いことが知見される。然しながら、この場合、アームと照明体の間に３本の軸部材を介装しなければならず、部品点数の増加と、装置の大型化を招来する問題がある。しかも、多様化された旋回方向Ｘと首振り方向Ｙとねじり方向Ｚの三方向の回動は、３本の軸部材により相互に独立した動きとされるため、スムース且つ柔軟な姿勢変更を行い難いという問題がある。
【０００５】
ところで、本発明者らは、アームから突出するボール手段と、照明体に設けた軸受手段と、前記ボール手段と前記軸受手段の間に介装した中間手段とを構成し、中間手段のソケット部によりボール手段のボール部を抱持することにより照明体の旋回方向Ｘとねじり方向Ｚの姿勢変更を可能ならしめ、中間手段のソケット部から側方に延びる支軸部を照明体の軸受手段に軸支することにより照明体の首振り方向Ｙの姿勢変更を可能ならしめることが有利であることを知見した。そして、その際、照明体が自重により首振り方向Ｙに首垂れすることを防止すると共に、ユーザが首振り方向Ｙに対して照明体を姿勢変更せしめるに際し、その動きの固さが最適となるように調節できるように、中間手段の支軸部の周面を調節自在に押圧する調圧手段を設けることが有利であることを知見した。
【０００６】
前記調圧手段は、照明体に設けた合成樹脂製の固定軸受部に形成した円弧状の切欠部と、金属板から成る可動軸受部に形成した円弧状の凹曲部との間に支軸部を抱持せしめ、該可動軸受部を支軸部の周面に対して調節自在に押圧せしめる締着手段を設けることにより構成することができる。然しながら、このような構成の場合、金属板により支軸部が合成樹脂製の固定軸受部に圧接されるため、照明体を首振り方向Ｙに頻繁に回動すると、固定軸受部の切欠部が摩耗したり、摩擦熱により切欠部の摺擦面を溶融せしめられる問題がある。特に、照明器具の商品を展示会や店頭販売に供し、デモンストレーションとして照明体の姿勢変更を頻繁に実行する際、前記問題を顕在化する。
【０００７】
【課題を解決するための手段】
本発明は、上記課題を解決した照明器具を提供するものであり、その手段として構成したところは、アームの先端に照明体を、アーム軸線に交差する縦軸回りの旋回方向Ｘと、アーム軸線に交差する横軸回りの首振り方向Ｙと、アーム軸線の延長軸回りのねじり方向Ｚに対して姿勢変更自在に取付けて成る照明器具であって、アームから突出するボール部を備えたボール手段と、照明体に設けられた軸受手段と、前記ボール手段と前記軸受手段の間に介装された中間手段と、該中間手段と照明体の間に設けられた調圧手段とを備え、前記中間手段は、ボール部を抱持することにより照明体を旋回方向Ｘとねじり方向Ｚに姿勢変更可能とするソケット部と、ソケット部から側方に延設されると共に照明体の軸受手段に軸支されることにより照明体を首振り方向Ｙに姿勢変更可能とする支軸部とを備えており、前記調圧手段は、照明体に固設されると共に前記支軸部の周面に沿う円弧状の切欠部を形成した合成樹脂製の固定軸受部と、該固定軸受部の切欠部に沿って設けられた断面円弧状の耐熱性のライニング材と、前記ライニング材に対向して配置された可動軸受部と、該可動軸受部とライニング材の間に前記支軸部を回動自在に抱持せしめた状態で可動軸部材を支軸部の周面に対して調節自在に押圧せしめる締着手段とから成る点にある。
【０００９】
本発明の好ましい実施形態において、照明体に固設された固定軸受部は、支軸部に交差して配設されたほぼ平行な合成樹脂製リブにより構成され、耐熱性のライニング材は、平行なリブのそれぞれに設けた円弧状の切欠部に跨設された断面円弧状の金属板により構成され、該金属板から延設した舌片を照明体の係止部に係止せしめられている。
【００１０】
更に、本発明の好ましい実施形態において、可動軸受部は、一対の翼部の間に凹曲部を形成した金属板により構成され、該凹曲部とライニング材の間に支軸部を回動自在に抱持した状態で、金属板の一方の翼部を照明体に固定すると共に、他方の翼部を進退自在な締着手段を介して照明体に連結している。
【００１１】
【発明の実施の形態】
以下図面に基づいて本発明の好ましい実施形態を詳述する。
【００１２】
図１は、本発明の照明器具１を装備したデスク２の１例を示している。デスク２の天板３には、下側書棚４と上側書棚５が着脱自在に積層設置され、図２に示すように、下側書棚４の背板４ａと上側書棚５の背板５ａを相互に前後に偏位せしめている。即ち、デスク２の前後方向に対して、前方位置に下側書棚４の背板４ａが位置し、後方位置に上側書棚５の背板５ａが位置せしめられ、背板４ａの後面と背板５ａの前面との間に図示のような距離ｄを有する。また、上側書棚５の棚板５ｂは、下側書棚４の背板４ａの上端よりも上方位置に配置され、図示のように充分な距離Ｄを有する。尚、上側書棚５は下側書棚４から取外し自在であり、下側書棚４は天板３から取外し自在である。
【００１３】
照明器具１は、支柱６と、該支柱の上端から屈折してほぼ水平方向に延びるアーム７と、該アーム７の先端に連結された照明体８を備えており、デスク２に対する装着のバリエーションを持たせるため、次のような装着形態を選択的に可能とする。
【００１４】
図２に示す第一の装着形態において、デスク２には下側書棚４と上側書棚５が積層設置されており、照明器具１の支柱６を下側書棚４の背板４ａの背面に固着せしめられる。前述のように上下に位置する背板５ａ、４ａは、前後方向に距離ｄを有しているので、支柱６の上部は、上側書棚５の背板５ａの前面側に突出する。そして、前述のように上側書棚５の棚板５ｂが充分な距離Ｄを有して上方に位置するので、アーム７は該棚板５ｂの下方空間に配置され、照明体８は天板３に光を照射可能な位置に配置される。後述する図５（Ａ）に示すように、支柱６には下端近傍部において上下方向に間隔をあけて２個所に取付孔９ａ、９ｂが貫設され、下側書棚４の背板４ａの背面には下端近傍部において上下方向に間隔をあけて２個所に埋込みナット１０ａ、１０ｂが設けられており、選択された取付孔９ａ又は９ｂと選択された埋込みナット１０ａ又は１０ｂを相互に合致せしめた状態で、取付孔に挿通した頭付きボルト１１を埋込みナットに螺着する構成とされ、このような選択により支柱６の上下取付位置を変更可能としている。そこで、図２に示す第一の装着形態では、下側の取付孔９ｂを下側の埋込みナット１０ｂに合致せしめた状態で頭付きボルト１１を締着しており、従って、支柱６は変更可能な上下取付位置のうち、最も下側の位置に取付けられている。
【００１５】
図３に示す第二の装着形態において、下側書棚４から上側書棚５が取外されている。従って、照明器具１は、支柱６の上部を下側書棚４の背板４ａから上方に延出せしめ、自由な空間にアーム７及び照明体８を配置している。そこで、前述のように取付孔９ａ、９ｂと埋込みナット１０ａ、１０ｂを選択することにより、背板４ａに対する支柱６の取付位置を変更することが可能である。即ち、前述の図２に示す最下位置の他、図３及び図５（Ａ）に示すように上側の取付孔９ａを上側の埋込みナット１０ａに合致せしめた状態で頭付きボルト１１を締着することにより支柱６を前記最下位置よりもやや上方に位置せしめた中間位置が可能であり、更に、図示省略しているが、下側の取付孔９ｂを上側の埋込みナット１０ａに合致せしめた状態で頭付きボルト１１を締着することにより支柱６を前記中間位置よりも更に上方に位置せしめた最上位置が可能である。
【００１６】
図４に示す第三の装着形態において、デスク２の天板３からは全ての書棚が取外されている。この場合、照明器具１の支柱６は、取付具１２を使用することにより天板３に装着される。図５（Ｂ）及び図７（Ｂ）に示すように、取付具１２は、締着ボルト１３を備えたコ字形のクランプ金具１４により天板３の縁部を挟持する構成とされ、クランプ金具１４から起立する横断面コ字形のブラケット１５に支柱６の下端近傍部を嵌合した状態で、前述の一対の取付孔９ａ、９ｂに挿入された一対の頭付きボルト１１、１１をブラケット１５に挿通せしめると共にナット１６、１６を締着する構成である。尚、前記ボルト及びナットを含んでブラケット１５を被うカバー部材１７が設けられている。
【００１７】
照明器具１の支柱６は、図６及び図７（Ａ）に示すように、アルミニウム等の軽金属その他の素材による押出し材又は引抜き材から成り、中空の柱材を構成することが好ましく、中央に形成された断面角形の角筒部１８を長手方向に延設すると共に、左右両側壁の内面に沿って長手方向に延びるほぼ筒状のリブ１９、１９を形成し、背壁には背面に開口する溝２０を長手方向に沿って形成している。そこで、図５（Ａ）に示すように、支柱６の下端開口を蓋材２１により閉鎖し、該蓋材２１を固定するビス２２、２２を前記リブ１９、１９にねじ込み固着している。
【００１８】
図２及び図３に示した第一及び第二の装着形態における支柱６の取付状態を安定ならしめるため、下側書棚４における背板４ａの背面には、支柱６を抱持する固定バンド２３が設けられており、該固定バンド２３の両端の取付孔に挿入された頭付きボルト２４、２４を、背板４ａの背面に設けられた埋込みナット２５、２５に螺着する構成とされている。従って、第一及び第二の装着形態において、固定バンド２３は頭付きボルト２４、２４により緊締され、支柱６を背板４ａと固定バンド２３の間に締着する。一方、頭付きボルト２４、２４を弛め又は取外すことにより、上述したような支柱６の上下取付位置の変更が可能であり、しかも、図４に示すような下側書棚４の取外しが可能である。
【００１９】
照明器具１のアーム７は、図８に示すように、それぞれ合成樹脂製の外アーム２６に内アーム２７をスライド自在に内嵌した伸縮アームを構成している。図９及び図１０に示すように、外アーム２６は、上下に分割された上体２６ａと下体２６ｂを重ね合わせた状態で、両側縁部を相互にビス等により結合することにより中空体を形成し、下体２６ｂの尾端部に顎部２８を一体に形成している。図１０に示すように、顎部２８は、底壁２８ａから横断面角形の角軸部２９を垂設しており、該角軸部２９に金属製の補強コアー３０を内挿している。そこで、支柱６の上端から角筒部１８に角軸部２９を挿入すると共に、支柱６の上端開口を顎部２８の底壁２８ａにより閉鎖し、該底壁２８ａを固定するビス３１、３１を支柱６のリブ１９、１９にねじ込み固着している。
【００２０】
図８及び図９に示すように、内アーム２７は、皿体２７ａの上部開口を蓋体２７ｂにより閉鎖しビス等により結合することにより中空体を形成し、皿体２７ａの尾端近傍部における両側壁の外側に断面コ字形のスライドガイド３２、３２を設けている。中空体を構成する外アーム２６の両側内面にはスライド溝３３、３３が形成されており、該スライド溝３３、３３は、外アーム２６の先端において閉鎖壁３３ａにより閉鎖されている。そこで、内アーム２７は、外アーム２６に入れ子状に挿入された状態で、前記スライドガイド３２、３２をスライド溝３３、３３に摺動自在に嵌合せしめる。図８に示すように内アーム２７を外アーム２６に押込んだ状態では、内アーム２７の後端部が外アーム２６の後端壁に接当する。この状態から内アーム２７を引出すと、内アーム２７と共にスライドガイド３２、３２がスライド溝３３、３３に沿って摺動し、スライドガイド３２、３２の前端が閉鎖壁３３ａ、３３ａに接当した状態で停止する。
【００２１】
図２ないし図４並びに図８及び図１２に示すように、照明体８は、横方向に長く延び下向きに開口する庇状のシェード３４を備え、該シェード３４に直管式その他の蛍光ランプから成る光源体３５並びに々点灯装置及び調光装置等（図示せず）を装備すると共に、光源体３５の上方に沿って延びる反射板３６を設けている。図１２に示すように、シェード３４の長手方向の中央個所には窓孔を介して透明又は半透明の表示板３７が嵌着されており、光源体３５の光を反射板３６の透孔を通過して表示板３７に透光せしめ、該表示板３７に表示された文字又は図柄等の標章を顕在的に表示する。シェード３４の庇縁３４ａの内側には、透光を緩和するために乳白色等の合成樹脂板等から成る曇板３８が設けられている。曇板３８は、庇縁の長手方向全長にわたって延びるスカート部３８ａの上部から内側に向けて一体に突設された取付リブ３８ｂを前記反射板３６の前縁にビス等の固定手段３９で固定しており、スカート部３８ａの長手方向両端から内側に折曲された取付片３８ｃをシェード３４の両側壁の内側に固定している。更に、曇板３８の長手方向中央部には、スカート部３８ａとシェード３４の内面との間を遮蔽する遮蔽部３８ｄがスカート部３８ａから一体に突設されている。そこで、光源体３５から照射される照明光のうち、庇縁３４ａの下方に向けて照射される光は、曇板３８のスカート部３８ａによって緩和され防眩されるので、デスク使用者の顔面への直接照射が防止される。一方、表示板３７に照射される光は、遮蔽部３８ｄにより外部への直接的な漏洩が防止されるので、表示板３７に表示された標章の顕在化に貢献する。しかも、シェード３４の庇縁３４ａを手指で把持することにより照明体８の姿勢を変更せしめる際、前記遮蔽部３８ｄが指当たりとして役立つ。
【００２２】
照明体８は、アーム７の先端（内アーム２７の先端）に対して、図１８に示すように、伸縮自在なアーム７の軸線Ａに交差する縦軸Ｖ回りの旋回方向Ｘと、前記軸線Ａに交差する横軸Ｈ回りの首振り方向Ｙと、前記軸線Ａの延長軸Ｅ回りのねじり方向Ｚに対して姿勢変更自在となるように取付けられている。旋回方向Ｘとねじり方向Ｚの姿勢変更は、後述するようなボールジョイントにより達成される。このため、旋回方向Ｘを規定する縦軸Ｖは、鉛直方向の一つの縦軸に限定されず、ボールの中心を通り且つ鉛直軸（図中のＶ）と横軸Ｈとの間において傾斜する無数の縦軸を含んでいることを諒解されたい。また、ねじり方向Ｚを規定する延長軸Ｅも、アーム軸Ａと同一線上で延びる同軸に限定されず、ボールの中心を通り且つ同軸（図中のＥ）と横軸Ｈとの間において傾斜する無数の縦軸を含んでいることを諒解されたい。
【００２３】
図１１及び図１２に示すように、アーム７と照明体８の間には、支軸４０にボール部４１を設けたボール手段４２と、中間手段４５が配設されており、中間手段４５は、前記ボール部４１を抱持するソケット部４３と、該ソケット部から両側方に延びる延長軸部４４、４４と、該延長軸部から更に延びる支軸部６１、６１を備えている。
【００２４】
ボール手段４２は、内アーム２７の先端に形成された筒部４６に支軸４０を挿入すると共にピン等により抜止め状に固定され、図例では回転不能に固定しており、ボール部４１を内アーム２７から突出せしめる。この際、支軸４０の首部には筒軸４７が外挿され、前記筒部４６の開口近傍において拡径された径大の環状壁部４８に筒軸４７を回動自在に内嵌せしめている。
【００２５】
中間手段４５は、可撓性を有する合成樹脂により成形した一対の半割り状の分割体４５ａ、４５ｂを合掌状態に結合することにより構成されている。即ち、分割体４５ａ、４５ｂをボルト及びナットから成る締着連結手段４９により結合し締着することにより、ボール部４１を挟んで抱持する球面状凹部を備えたソケット片部４３ａ、４３ｂの一対により前記ソケット部４３を構成すると共に、該ソケット片部４３ａ、４３ｂから延設された延長軸片部４４ａ、４４ｂの一対により前記延長軸部４４を構成し、更に、該延長軸片部４４ａ、４４ｂから延長された支軸片部６１ａ、６１ｂの一対により前記支軸部６１を構成する。
【００２６】
図１６及び図１７に示すように、半割り状の分割体４５ａ、４５ｂは、ソケット片部４３ａ、４３ｂの間にボール部４１を抱持して合掌せしめた状態で、一対の支軸片部６１ａ、６１ｂの対向面を相互に接当係止せしめる係止面６２を形成する一方、一対のソケット片部４３ａ、４３ｂの対向面と一対の延長軸片部４４ａ、４４ｂの対向面のそれぞれに相互にギャップｄを介して離間せしめられた非係止面６３、６４を形成しており、延長軸片部４４ａ、４４ｂに締着連結手段４９を挿通するための貫通孔６５を設けている。尚、貫通孔６５は、ボール手段４２の支軸４０側に配置される延長軸片部４４ｂにナットを回動不能に嵌入するナット受入開口６５ｂを備えると共に、ボール部４１の先端側に配置される延長軸片部４４ａにボルトの頭部を回動自在に嵌入するボルト頭部受入開口６５ａを備えている。
【００２７】
図１７に示すように、ボール手段４２のボール部４１の周面が真球状であるのに対して、ソケット片部４３ａ、４３ｂの球面状凹部は真球状でなく、前記非係止面６３に向けてソケット片部４３ａ、４３ｂの次第に肉厚を薄く形成することにより、非係止面６３に近傍する領域においてソケット片部４３ａ、４３ｂの内面とボール部４１の周面との間に隙間ｓが形成されるように構成されている。
【００２８】
尚、分割体４５ａ、４５ｂを合掌することにより構成される中間手段４５は、延長軸部４４よりも支軸部６１を径大に形成し、延長軸部４４よりも支軸部６１の間に異径段部６６を設けている。
【００２９】
そこで、ソケット片部４３ａ、４３ｂの間にボール部４１を抱持せしめた状態で一対の分割体４５ａ、４５ｂを合掌せしめると、支軸片部６１ａ、６１ａが相互に係止面６２を接当係止する反面、ソケット片部４３ａ、４３ｂ及び延長軸片部４４ａ、４４ｂがそれぞれ相互に非係止面６３、６４によりギャップｄを形成する。従って、この状態で、延長軸片部４４ａ、４４ｂの貫通孔６５にボルト及びナットから成る締着連結手段４９を挿入し締着することにより、中間手段４５が組立てられる。この際、締着連結手段４９の締着力を調節することにより、ソケット部４３とボール部４１の間の摩擦抵抗を調節することができ、前述の旋回方向Ｘ及びねじり方向Ｚに照明体８を姿勢変更せしめる際の動きの固さを最適となるように設定できる。
【００３０】
組立てられた中間手段４５の延長軸部４４及び／又は支軸部６１は、照明体８に設けられた軸受手段５０、５０に軸支される。図例の場合、図１１及び図１４（Ａ）に示すように、合成樹脂製のシェード３４の背部に延設された首部３４ｃと、該首部３４ｃを下側から被いビス等の固着手段３４ｄにより固着される合成樹脂製の下側カバー３４ｂのそれぞれに、相互に対向して衝合されるリブ壁３４ｅ、３４ｆ（図１２参照）を設けており、両リブ壁３４ｅ、３４ｆのそれぞれに形成したほぼ半円形の切欠部を対向せしめることにより軸受手段５０を構成しており、延長軸部４４のうち異径段部６６に近傍する部位を軸受手段５０に軸支せしめ、異径段部６６を軸受手段５０の側面に適合せしめている。尚、中間手段４５と軸受手段５０の関係は、図例のように延長軸部４４を軸受手段５０に軸支せしめる構成とする他、支軸部６１を軸受手段５０に軸支せしめる構成としても良く、更には延長軸部４４と支軸部６１の両者を軸受手段５０に軸支せしめるように構成しても良い。
【００３１】
図１１に示すように、一方の軸受手段５０の近傍には調圧手段５３が設けられており、該調圧手段５３は、図１３及び図１４に示すように、照明体８の首部３４ｃに固設された固定軸受部５１と、該固定軸受部５１に設けられた耐熱性のライニング材６８と、該ライニング材６８に対向して配置された可動軸受部５２を備え、前記ライニング材６８と可動軸受部５２の間に中間手段４５の支軸部６１を回動自在に抱持せしめる。
【００３２】
固定軸受部５１は、図１３に示すように、照明体８の首部３４ｃに一体成形された合成樹脂製リブ５１ａから成り、該リブ５１ａに支軸部６１の周面に沿う円弧状の切欠部５１ｂを形成している。尚、図１１に示すように、ほぼ平行な一対のリブ５１ａ、５１ａが支軸部６１に交差して配設されている。
【００３３】
耐熱性のライニング材６８は、亜鉛板その他の金属板６８ａを断面円弧状にプレス成形することにより構成され、前記固定軸受部５１の平行なリブ５１ａ、５１ａに跨設されると共に、各リブの円弧状の切欠部５１ｂに合致せしめられる。図１４に示すように、金属板６８ａの一端には舌片６８ｂが延設されており、該舌片６８ｂを照明体８の首部３４ｃに設けた係止部６９に係止せしめられる。図例の場合、係止部６９は、首部３４ｃから垂設したボス６９ａから小径突起６９ｂを突設しており、該小径突起６９ｂに前記舌片６８ｂの小孔６８ｃを係合せしめている。
【００３４】
図１３に示すように、可動軸受部５２は、両翼部５２ａ、５２ｂの間に支軸部６１を抱持せしめる円弧状の凹曲部５２ｃを屈曲形成した鉄板や鋼板等の金属板から成り、一方の翼部５２ａを照明体８の首部３４ｃに対してビス等の固定手段７０により固定される。図例の場合、固定手段７０を構成するビスは、固定軸受部５１を構成するリブ５１ａに一体成形したボスのボス孔５１ｃに螺着され、他方の翼部５２ｂに締着手段５５を設けている。図例の場合、締着手段５５は、照明体８の首部３４ｃに形成されたボス部３４ｇに下向きに挿着されると共に突出する先端を前記翼部５２ｂに貫通されたネジ軸５４と、該ネジ軸５４に螺合するナットを備えた締着部５５ａと、該締着部５５ａに付設された操作部５５ｂを構成しており、前記操作部５５ｂを照明体８の下側カバー３４ｂから下方に突出せしめている。従って、操作部５５ｂを摘んで回動することにより締着部５５ａをネジ軸５４に対して前進せしめると、翼部５２ｂが緊張され、凹曲部５２ｃにより支軸部６１の周面を緊締する。反対に、締着部５５ａをネジ軸５４上で後退せしめると、支軸部６１の周面上で凹曲部５２ｃの緊締力を緩める。従って、前記調圧手段５３により、照明体８が自重により前記首振り方向Ｙに垂れ下がることを防止できるだけでなく、ユーザが首振り方向Ｙに対して照明体８を姿勢変更せしめる際、その動きの固さが最適となるように設定できる。尚、可動軸受部５２を構成する金属板を板バネにより形成しておけば、前記締着部５５ａを後退せしめた際、板バネの復元力により自動的かつ積極的に支軸部６１を緩めることができる。
【００３５】
照明体８を首振り方向Ｙに回動せしめるに際し、調圧手段５３の可動軸受部５２を支軸部６１に強く緊締せしめていると、支軸部６１がライニング材６８に対して強く圧接されており、該支軸部６１とライニング材６８の摺接面に大きな摩擦抵抗を生じる。この点に関し、支軸部６１を固定軸受部５１の切欠部５１ｂに直接に軸支せしめた場合は、照明体８を首振り方向Ｙに頻繁に回動せしめる際に生じる摩擦熱により、合成樹脂製の固定軸受部５１を溶融せしめる危険があるのに対して、本発明の実施形態によれば、固定軸受部５１の切欠部５１ｂと支軸部６１の間に金属板６８ａから成る耐熱性のライニング材６８を設けているので、このような危険はない。
【００３６】
また、金属板６８ａから成る断面円弧状のライニング材６８が広面積の範囲で支軸部６１の周面を支持できるので、固定軸受部５１それ自体を分厚く形成する必要がなく、前述のような薄いリブ５１ａ、５１ａにより構成すれば足り、合成樹脂素材を節約できると共に、合成樹脂成形に際するヒケ等の問題もなく成形が容易となる。
【００３７】
ところで、照明器具１を長期使用し、照明体８を旋回方向Ｘ及びねじり方向Ｚに繰返し姿勢変更せしめると、ソケット部４３とボール部４１の間の摩擦抵抗が次第に減少し、照明体８の旋回方向Ｘ及びねじり方向Ｚに対する動きの固さが緩くなるが、その場合は、ユーザにおいて締着連結手段４９のボルトを締着し直すことによりソケット片部４３ａ、４３ｂを改めてボール部４１に対して強く締着せしめ、照明体８の動きの固さを最適となるように調節すれば良い。図例の場合、図１１に示すように、照明体８は、下側カバー３４ｂを含む首部３４ｃが軸受手段５０、５０を挟んで内方に凹曲された凹部６７を形成しており、図２の鎖線に示すように照明体８を下向き垂れ下がり状に姿勢変更すると、前記凹部６７が水平姿勢から垂直姿勢へと姿勢変更され、中間手段４５の前方空間を開放するので、該凹部６７による開放空間を介して、照明器具１の前方からドライバーその他の工具手段により締着連結手段４９のボルトを操作することができる。尚、凹部６７に代えて、例えば、照明体８の外部からドライバー等の工具をボルトに向けて挿入自在な孔等を設けても良い。また、ボルト頭部にはドライバー係合溝の他、コイン等の係合溝、その他の回転操作手段を設けておけば良い。
【００３８】
前記調節のために締着連結手段４９を締着すると、前述のように、非係止面６３、６４によるギャップｄが形成されているので、ソケット片部４３ａ、４３ｂ及び延長軸片部４４ａ、４４ｂは、好適に締着され、ソケット部４３とボール部４１の間の摩擦抵抗を増す。これに対して、支軸片部６１ａ、６１ａは、常時、係止面６２を接当係止しているので、締着連結手段４９の締着により支軸部６１の外径を縮径することはなく、締着の有無に関わらず常に軸受手段５０に好適に軸支されている。
【００３９】
図示実施例の場合、係止面６２が支軸片部６１ａ、６１ａの全長にわたり設けており、締着連結手段４９により延長軸片部４４ａ、４４ｂを締着した際、図１６に示すように、係止面６２のうち異径段部６６に近傍する部位が支点ｐを形成することにより、図示矢印ｋで示すように支軸片部６１ａ、６１ａの軸端を拡開せしめるように作用し、支軸部６１を調圧手段５３に対して圧接せしめる。尚、このような支点ｐの形成と、前述のような軸受手段５０に対する部位での縮径を防止する構成とするためには、係止面６２は、支軸片部６１ａ、６１ａの全長にわたり設けなくても良く、少なくとも延長軸片部４４ａ、４４ｂに近傍する個所（図例における異径段部６６に近傍する個所）に設けておけば良い。
【００４０】
上記から明らかなように、アーム７と照明体８の間には、中間手段４５のソケット部４３とボール手段４２のボール部４１によるボールジョイントが構成されている。従って、ボールジョイントの自在性により、照明体８は、前記旋回方向Ｘと首振り方向Ｙとねじり方向Ｚに関して、それぞれの方向並びにそれらを複合せしめた方向への姿勢変更が可能であり、本発明の実施形態をそのように構成しても良い。
【００４１】
然しながら、図示の実施形態においては、ボールジョイントにより旋回方向Ｘとねじり方向Ｚに関する姿勢変更だけを可能ならしめ、首振り方向Ｙに関する姿勢変更は前記延長軸部４４及び／又は支軸部６１と軸受手段５０とから成るピボット式の首振り回動手段により可能ならしめる構成としている。
【００４２】
図１１に示すように、中間手段４５の一方の分割体４５ｂのソケット片部４３ｂは、ボール手段４２の支軸４０の首部に外挿された筒軸４７を挿通せしめる制御孔５６を開設している。そこで、制御孔５６を横向きに延びる長孔に形成しており、これにより中間手段４５が旋回方向Ｘに向けて回動することを可能ならしめている。
【００４３】
然るに、図１２に示すように、制御孔５６は、中間手段４５の首振り方向Ｙの回動を阻止するように上下縁部を筒軸４７に係合せしめた係合手段５７を構成する。図例の場合、筒軸４７における上下部を切除された平坦軸部４７ａを制御孔５６に内嵌せしめている。従って、図示実施形態の構成によれば、ボールジョイントの部分において照明体８が自重により前記首振り方向Ｙに垂れ下がることをなく、首振り方向Ｙに対する照明体８の姿勢変更は、ボールジョイントの両側方に設けられた延長軸部４４と軸受手段５０とから成るピボット式の首振り回動手段により達成される。
【００４４】
照明体８の光源体３５に電流を供給するための導線は、照明体８からアーム７の中空部を経て、支柱６の溝２０に案内され、床面に導かれる。このため、ボールジョイントにより、照明体８がねじり方向Ｚに向けて自由に回動自在であると、照明体８とアーム７の間において導線がねじられ断線の虞れを生じることになる。そこで、ボール手段４２と中間手段４５の間には、中間手段４５のねじり方向Ｚの回動範囲を制限するストッパ手段５８が設けられている。図示実施形態の場合、図１２及び図１５に示すように、筒軸４７の外周面に突片５９が設けられ、該筒軸４７を回動自在に受入れる径大の環状壁部４８の内周面に周方向に間隔をあけて受片６０ａ、６０ｂが設けられている。図例の場合、中間手段４５をほぼ水平姿勢としたとき、図１５に示すように突片５９が上向き姿勢とされ、これに対して一対の受片６０ａ、６０ｂが突片５９の左右両側方に間隔をあけて配置されている。従って、この状態から中間手段４５を時計針方向に回動すると、係合手段５７により中間手段４５と一体的に回動する筒軸４７の突片５９が右側の受片６０ｂに接当し、これにより中間手段４５の時計針方向の回動を停止せしめる。反対に、中間手段４５を反時計針方向に回動すると、係合手段５７により中間手段４５と一体的に回動する筒軸４７の突片５９が左側の受片６０ａに接当し、これにより中間手段４５の反時計針方向の回動を停止せしめる。
【００４５】
【発明の効果】
本発明によれば、支軸部６１を照明体８の軸受手段５０に軸支せしめることにより、照明体８の姿勢変更を可能にした構成において、支軸部６１の周面を調節自在に押圧する調圧手段５３を設け、円弧状の切欠部５１ｂを形成した固定軸受部５１と、可動軸受部５２との間に支軸部６１を回動自在に抱持せしめ、締着手段５５により可動軸受部５２を支軸部６１の周面に対して調節自在に押圧せしめる構成であるから、ユーザが照明体８の姿勢を変更する際の動きの固さを最適状態に調節することが可能である。
【００４６】
この際、可動軸受部５２を板バネにより構成しておけば、翼片部５２ｂが締着部５５ａに弾支され、該締着部５５ａが自由に回動して弛むことを防止する弛み止めとして機能し、しかも、締着手段５５を前進せしめることにより支軸部６１を緊締する反面、締着手段５５を後退せしめれば板バネの復元力により自動的かつ積極的に支軸部６１を緩めることができる。
【００４７】
ところで、支軸部６１を固定軸受部５１の切欠部５１ｂに直接に軸支する場合は、照明体８を首振り方向Ｙに頻繁に回動せしめる際に生じる摩擦熱により、合成樹脂製の固定軸受部５１を溶融せしめる危険があるのに対して、本発明によれば、固定軸受部５１の切欠部５１ｂと支軸部６１の間に耐熱性のライニング材６８を設けているので、このような危険がなく、耐用性を満足できる。
【００４８】
しかも、ライニング材６８を断面円弧状の金属板６８ａにより形成し、広面積の範囲で支軸部６１の周面を支持する構成としておけば、固定軸受部５１それ自体を分厚く形成する必要がなく、図例のように固定軸受部５１を薄いリブ５１ａ、５１ａで形成することが可能になり、合成樹脂素材を節約できると共に、合成樹脂成形に際するヒケ等の問題もなく成形が容易となる。
【００４９】
更に、本発明によれば、アーム７から突出するボール部４１を備えたボール手段４２と、照明体８に設けられた軸受手段５０と、前記ボール手段４２と軸受手段５０の間に介装された中間手段４５とを備え、中間手段４５のソケット部４３と前記ボール部４１により少なくとも照明体８を旋回方向Ｘとねじり方向Ｚに姿勢変更可能とするボールジョイントを構成すると共に、中間手段４５の支軸部６１により照明体８を首振り方向Ｙに姿勢変更可能とする首振り回動手段を構成した点に特徴がある。従って、ボールジョイントにより、旋回方向Ｘを規定する縦軸Ｖが鉛直方向の一つの縦軸に限定されずボールの中心を通り且つ鉛直軸（図１８のＶ）と横軸Ｈとの間において傾斜する無数の縦軸を含み、しかも、ねじり方向Ｚを規定する延長軸Ｅもアーム軸Ａと同一線上で延びる同軸に限定されずボールの中心を通り且つ同軸（図１８のＥ）と横軸Ｈとの間において傾斜する無数の縦軸を含むので、照明体８の柔軟且つ自在な姿勢変更を可能にする。しかも、前記中間手段４５の支軸部６１と照明体８の軸受手段５０、５０により、上述のような首振り回動手段を構成するので、照明体８の首振り方向Ｙに対する姿勢変更をスムースに行うことができ、この際、照明体８は、軸部と軸受による構成であるから回動範囲を広範囲に形成することが可能であり、例えば、照明体８を図２に示す実線の位置から鎖線の位置まで回動せしめる他、更に鎖線の位置からアーム７の下側にほぼ重なるような位置まで回動可能に構成できるので、アーム７と照明体８をアセンブリした状態で梱包する際のコンパクト化が可能になる。
【図面の簡単な説明】
【図１】本発明の照明器具を装備したデスクの１例を示す斜視図である。
【図２】本発明の照明器具をデスクに装備せしめる際の第一の装着形態を示す縦断側面図である。
【図３】本発明の照明器具をデスクに装備せしめる際の第二の装着形態を示す縦断側面図である。
【図４】本発明の照明器具をデスクに装備せしめる際の第三の装着形態を示す縦断側面図である。
【図５】デスクに対する照明器具の装着部分を示しており、（Ａ）は図３におけるＡ部の拡大図、（Ｂ）は図４におけるＢ部の拡大図である。
【図６】デスクの書棚に対する照明器具の装着部分を示しており、書棚の背板を破断して示す照明器具の背面図である。
【図７】照明器具の支柱を示しており、（Ａ）は図６のＣ−Ｃ線拡大断面図、（Ｂ）は図５（Ａ）のＤ−Ｄ線拡大断面図である。
【図８】本発明の１実施形態の照明器具におけるアームと照明体の連結部分を示す横断面図である。
【図９】図８のＥ−Ｅ線拡大断面図である。
【図１０】図８のＦ−Ｆ線拡大断面図である。
【図１１】ボールジョイントと首振り回動手段の１実施形態を拡大して示す横断面図である。
【図１２】図１１のＪ−Ｊ線拡大断面図である。
【図１３】図１１のＧ−Ｇ線拡大断面であり、本発明の調圧手段の１実施形態を示す断面図である。
【図１４】本発明の調圧手段の１実施形態を示しており、（Ａ）は図１１のＬ−Ｌ線拡大断面図、（Ｂ）はライニング材の１例を拡大して示す斜視図である。
【図１５】図１１のＨ−Ｈ線拡大断面図である。
【図１６】中間手段の１実施形態を拡大して示す横断面図である。
【図１７】中間手段のソケット部を拡大して示す縦断面図である。
【図１８】照明器具における照明体の旋回方向Ｘと首振り方向Ｙとねじり方向Ｚを説明する斜視図である。
【符号の説明】
１照明器具
２デスク
４下側書棚
５上側書棚
６支柱
７アーム
８照明体
２６外アーム
２７内アーム
３４シェード
３４ｂ下側カバー
３４ｃ首部
３５光源体
４０支軸
４１ボール部
４２ボール手段
４３ソケット部
４４延長軸部
４５中間手段
４９締着連結手段
５０軸受手段
５１固定軸受部
５１ａリブ
５１ｂ切欠部
５２可動軸受部
５３調圧手段
６１支軸部
６８ライニング材
６８ａ金属板
６８ｂ舌片
６８ｃ小孔
６９係止部
６９ａボス部
６９ｂ突起[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture, for example, a lighting fixture used by being mounted on furniture such as a desk.
[0002]
[Prior art]
As a lighting device for a desk, there is known a lighting device provided with an arm that refracts from the upper end of a support fixed to the desk and extends in the horizontal direction, and a lighting body is attached to the tip of the arm. Usually, in order to change the irradiation direction of the light that illuminates the top of the desk, the illuminating body includes a turning direction X about the vertical axis that intersects the arm axis and a swing direction Y about the horizontal axis that intersects the arm axis. The posture can be freely changed.
[0003]
[Problems to be solved by the invention]
In the prior art, a vertical axis that defines the turning direction X and a horizontal axis that defines the swing direction Y are both formed by shaft members, and the rotation in the swing direction X and the swing direction Y is performed independently. Since it is a structure, when changing the attitude | position of a lighting body, it receives restrictions with the attitude | position which can be selected.
[0004]
Therefore, in order to diversify the posture change of the illuminating body, in addition to the vertical axis and the horizontal axis, a shaft member that can change the posture in the torsional direction Z around the extension axis of the arm axis is added. It is found to be good. However, in this case, three shaft members must be interposed between the arm and the illuminating body, resulting in an increase in the number of parts and an increase in the size of the apparatus. In addition, the diversified turning direction X, swinging direction Y, and torsional direction Z are rotated independently by the three shaft members, so that the posture can be changed smoothly and flexibly. There is a problem that it is difficult.
[0005]
By the way, the present inventors constituted ball means projecting from the arm, bearing means provided on the illuminating body, and intermediate means interposed between the ball means and the bearing means, and the socket portion of the intermediate means By holding the ball portion of the ball means, it is possible to change the posture of the illuminating body in the turning direction X and the twisting direction Z, and the support shaft portion extending laterally from the socket portion of the intermediate means is used as the bearing means of the illuminating body. It has been found that it is advantageous to make it possible to change the posture of the illuminating body in the swing direction Y by pivotally supporting it. At that time, the lighting body is prevented from drooping in the swinging direction Y due to its own weight, and when the user changes the posture of the lighting body with respect to the swinging direction Y, the rigidity of the movement is optimal. Thus, it has been found that it is advantageous to provide a pressure adjusting means for pressing the peripheral surface of the support shaft portion of the intermediate means in an adjustable manner.
[0006]
The pressure adjusting means includes a support shaft between an arcuate notch formed in a synthetic resin fixed bearing provided in the illuminator and an arcuate concave bent formed in a movable bearing made of a metal plate. It is possible to configure by providing a fastening means for holding the portion and pressing the movable bearing portion against the peripheral surface of the support shaft portion in an adjustable manner. However, in such a configuration, since the support shaft portion is pressed against the synthetic resin fixed bearing portion by the metal plate, when the illuminating body is frequently rotated in the swing direction Y, the notch portion of the fixed bearing portion is There is a problem that it is worn or the friction surface of the notch is melted by frictional heat. In particular, when the product of a lighting fixture is used for exhibitions or over-the-counter sales, and the attitude of the lighting body is frequently changed as a demonstration, the above problem becomes apparent.
[0007]
[Means for Solving the Problems]
The present invention provides a luminaire that solves the above-mentioned problems, and as a means thereof, the illuminating body is provided at the tip of the arm, the turning direction X about the vertical axis that intersects the arm axis, and the arm axis. The lighting device is mounted in such a manner that its posture can be freely changed with respect to the swinging direction Y about the horizontal axis intersecting the axis and the torsional direction Z about the extension axis of the arm axis. And bearing means provided in the illuminating body, intermediate means interposed between the ball means and the bearing means, and pressure adjusting means provided between the intermediate means and the illuminating body, The intermediate means includes a socket portion that can change the posture of the illuminating body in the turning direction X and the torsional direction Z by holding the ball portion, and extends laterally from the socket portion, and is supported by the bearing means of the illuminating body. Lighting by being supported The pressure adjusting means is fixed to the illuminating body and forms an arc-shaped cutout portion along the peripheral surface of the support shaft portion. A fixed bearing portion made of synthetic resin, a heat-resistant lining material having an arc-shaped cross section provided along a notch portion of the fixed bearing portion, a movable bearing portion disposed to face the lining material, A fastening means for pressing the movable shaft member against the peripheral surface of the support shaft portion in a state where the support shaft portion is rotatably held between the movable bearing portion and the lining material. is there.
[0009]
In a preferred embodiment of the present invention, the fixed bearing portion fixed to the illuminating body is constituted by substantially parallel synthetic resin ribs arranged to intersect the support shaft portion, and the heat-resistant lining material is parallel. Each of the ribs is formed by a metal plate having an arc-shaped cross section straddling the arc-shaped cutout portion provided on each of the ribs, and a tongue piece extending from the metal plate is locked to the locking portion of the illuminating body. .
[0010]
Furthermore, in a preferred embodiment of the present invention, the movable bearing portion is constituted by a metal plate in which a concave curved portion is formed between a pair of wing portions, and the support shaft portion is rotated between the concave curved portion and the lining material. While being held freely, one wing portion of the metal plate is fixed to the illuminating body, and the other wing portion is connected to the illuminating body through a fastening means that can be moved forward and backward.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 shows an example of a desk 2 equipped with a lighting fixture 1 of the present invention. On the top plate 3 of the desk 2, a lower book shelf 4 and an upper book shelf 5 are detachably stacked, and as shown in FIG. 2, the back plate 4a of the lower book shelf 4 and the back plate 5a of the upper book shelf 5 are connected to each other. It is biased back and forth. That is, the back plate 4a of the lower bookcase 4 is positioned at the front position with respect to the front-rear direction of the desk 2, and the back plate 5a of the upper bookcase 5 is positioned at the rear position, and the rear surface of the back plate 4a and the back plate 5a A distance d as shown in the figure. Further, the shelf board 5b of the upper bookcase 5 is disposed above the upper end of the back board 4a of the lower bookcase 4, and has a sufficient distance D as shown in the figure. The upper bookcase 5 is detachable from the lower bookcase 4, and the lower bookcase 4 is detachable from the top 3.
[0013]
The lighting fixture 1 includes a support column 6, an arm 7 that is refracted from the upper end of the support column and extends in a substantially horizontal direction, and an illuminating body 8 connected to the tip of the arm 7. In order to have it, the following mounting modes are selectively possible.
[0014]
In the first mounting form shown in FIG. 2, a lower bookcase 4 and an upper bookcase 5 are stacked on the desk 2, and the column 6 of the lighting device 1 is fixed to the back surface of the back plate 4 a of the lower bookcase 4. It is done. As described above, the back plates 5 a and 4 a positioned above and below have a distance d in the front-rear direction, so that the upper portion of the column 6 protrudes to the front side of the back plate 5 a of the upper bookcase 5. As described above, since the shelf 5b of the upper bookcase 5 is located above with a sufficient distance D, the arm 7 is disposed in the lower space of the shelf 5b, and the illuminating body 8 is attached to the top 3 It is arranged at a position where light can be irradiated. As shown in FIG. 5A, which will be described later, the support column 6 is provided with mounting holes 9a, 9b penetrating in two places at intervals in the vertical direction in the vicinity of the lower end, and the back surface of the back plate 4a of the lower bookcase 4 Are provided with embedded nuts 10a and 10b at two locations in the vicinity of the lower end in the vertical direction, and the selected mounting hole 9a or 9b and the selected embedded nut 10a or 10b are matched with each other. In this state, the headed bolt 11 inserted through the mounting hole is configured to be screwed into the embedded nut, and the vertical mounting position of the column 6 can be changed by such selection. Therefore, in the first mounting form shown in FIG. 2, the head bolt 11 is fastened with the lower mounting hole 9b aligned with the lower embedded nut 10b, and therefore the column 6 can be changed. It is attached to the lowest position among the vertical mounting positions.
[0015]
In the second mounting form shown in FIG. 3, the upper bookcase 5 is removed from the lower bookcase 4. Therefore, the lighting fixture 1 has the upper part of the column 6 extended upward from the back plate 4a of the lower bookcase 4, and the arm 7 and the illuminating body 8 are arranged in a free space. Therefore, the mounting position of the column 6 with respect to the back plate 4a can be changed by selecting the mounting holes 9a, 9b and the embedded nuts 10a, 10b as described above. That is, in addition to the lowest position shown in FIG. 2, the head bolt 11 is fastened with the upper mounting hole 9a aligned with the upper embedded nut 10a as shown in FIGS. 3 and 5A. By doing so, an intermediate position in which the support column 6 is positioned slightly above the lowermost position is possible, and although not shown, the lower mounting hole 9b is made to match the upper embedded nut 10a. By tightening the headed bolt 11 in this state, the uppermost position where the column 6 is positioned further above the intermediate position is possible.
[0016]
In the third mounting form shown in FIG. 4, all the bookshelves are removed from the top plate 3 of the desk 2. In this case, the column 6 of the lighting fixture 1 is attached to the top plate 3 by using the fixture 12. As shown in FIGS. 5B and 7B, the fixture 12 is configured such that the edge of the top plate 3 is clamped by a U-shaped clamp fitting 14 having a fastening bolt 13. 14, with the bracket 15 having a U-shaped cross section rising from 14, the pair of headed bolts 11, 11 inserted into the pair of mounting holes 9 a, 9 b are attached to the bracket 15. The nut 16 and 16 are fastened together with being inserted. A cover member 17 that covers the bracket 15 including the bolts and nuts is provided.
[0017]
As shown in FIG. 6 and FIG. 7 (A), the column 6 of the luminaire 1 is made of an extruded material or a drawing material made of a light metal or other material such as aluminum, and preferably constitutes a hollow column material. The formed rectangular tube portion 18 having a square cross section extends in the longitudinal direction, and substantially cylindrical ribs 19 and 19 extending in the longitudinal direction along the inner surfaces of the left and right side walls are formed. A groove 20 is formed along the longitudinal direction. Therefore, as shown in FIG. 5A, the lower end opening of the support column 6 is closed by the lid member 21, and screws 22 and 22 for fixing the lid member 21 are screwed and fixed to the ribs 19 and 19.
[0018]
In order to stabilize the mounting state of the column 6 in the first and second mounting forms shown in FIGS. 2 and 3, a fixing band 23 for holding the column 6 is provided on the back surface of the back plate 4 a in the lower bookcase 4. The headed bolts 24, 24 inserted into the mounting holes at both ends of the fixed band 23 are screwed into the embedded nuts 25, 25 provided on the back surface of the back plate 4a. . Therefore, in the first and second mounting forms, the fixing band 23 is tightened by the headed bolts 24, 24, and the column 6 is fastened between the back plate 4 a and the fixing band 23. On the other hand, by loosening or removing the head bolts 24, 24, it is possible to change the vertical mounting position of the support column 6 as described above, and it is possible to remove the lower bookcase 4 as shown in FIG. is there.
[0019]
As shown in FIG. 8, the arm 7 of the lighting fixture 1 constitutes an extendable arm in which an inner arm 27 is slidably fitted to an outer arm 26 made of synthetic resin. As shown in FIG. 9 and FIG. 10, the outer arm 26 forms a hollow body by connecting both side edges with screws or the like in a state where the upper body 26a and the lower body 26b divided in the vertical direction are overlapped. And the jaw part 28 is integrally formed in the tail end part of the lower body 26b. As shown in FIG. 10, the jaw portion 28 has an angular shaft portion 29 having a rectangular cross section extending from the bottom wall 28 a, and a metal reinforcing core 30 is inserted into the angular shaft portion 29. Therefore, the angular shaft portion 29 is inserted into the rectangular tube portion 18 from the upper end of the support column 6, the upper end opening of the support column 6 is closed by the bottom wall 28a of the jaw portion 28, and screws 31, 31 for fixing the bottom wall 28a are provided. The ribs 19 and 19 of the column 6 are screwed and fixed.
[0020]
As shown in FIGS. 8 and 9, the inner arm 27 forms a hollow body by closing the upper opening of the dish body 27a with a lid body 27b and connecting with a screw or the like, and in the vicinity of the tail end of the dish body 27a. Slide guides 32, 32 having a U-shaped cross section are provided on the outside of both side walls. Slide grooves 33, 33 are formed on the inner surfaces of both sides of the outer arm 26 constituting the hollow body, and the slide grooves 33, 33 are closed by a closing wall 33a at the tip of the outer arm 26. Therefore, the inner arm 27 slidably fits the slide guides 32 and 32 into the slide grooves 33 and 33 while being inserted into the outer arm 26 in a nested manner. As shown in FIG. 8, when the inner arm 27 is pushed into the outer arm 26, the rear end portion of the inner arm 27 contacts the rear end wall of the outer arm 26. When the inner arm 27 is pulled out from this state, the slide guides 32, 32 slide along the slide grooves 33, 33 together with the inner arm 27, and the front ends of the slide guides 32, 32 are in contact with the closing walls 33a, 33a. Stop at.
[0021]
As shown in FIG. 2 to FIG. 4 and FIG. 8 and FIG. 12, the illuminator 8 includes a bowl-shaped shade 34 that extends in the lateral direction and opens downward, and the shade 34 is formed of a straight tube type or other fluorescent lamp. A light source body 35 and a lighting device and a light control device (not shown) are provided, and a reflection plate 36 extending along the upper side of the light source body 35 is provided. As shown in FIG. 12, a transparent or translucent display plate 37 is fitted through a window hole at a central portion in the longitudinal direction of the shade 34, and the light from the light source body 35 is transmitted through the through hole of the reflection plate 36. It passes through and is made transparent on the display board 37, and marks such as characters or symbols displayed on the display board 37 are clearly displayed. A fogging plate 38 made of a synthetic resin plate such as milky white is provided on the inner side of the heel edge 34a of the shade 34 in order to reduce light transmission. The fogging plate 38 is fixed to a front edge of the reflection plate 36 by a fixing means 39 such as a screw, and a mounting rib 38b integrally projecting inward from the upper portion of the skirt portion 38a extending over the entire length in the longitudinal direction of the heel edge. The attachment pieces 38c bent inward from both longitudinal ends of the skirt portion 38a are fixed to the inner sides of both side walls of the shade 34. Further, a shielding portion 38 d that shields between the skirt portion 38 a and the inner surface of the shade 34 is integrally projected from the skirt portion 38 a at the central portion in the longitudinal direction of the cloud plate 38. Therefore, among the illumination light emitted from the light source body 35, the light emitted toward the lower side of the collar 34a is relaxed and anti-glare by the skirt portion 38a of the cloud plate 38, so that it is directed to the desk user's face. Is prevented from direct irradiation. On the other hand, since the light irradiated to the display board 37 is prevented from being directly leaked to the outside by the shielding part 38d, it contributes to the manifestation of the mark displayed on the display board 37. Moreover, when the posture of the illuminating body 8 is changed by gripping the collar 34a of the shade 34 with fingers, the shielding portion 38d is useful as a finger contact.
[0022]
As shown in FIG. 18, the illuminating body 8 has a turning direction X about the vertical axis V intersecting the axis A of the arm 7 that can be expanded and contracted with respect to the tip of the arm 7 (tip of the inner arm 27), and the axis. It is attached so that its posture can be freely changed with respect to a swinging direction Y around the horizontal axis H intersecting A and a twisting direction Z around the extension axis E of the axis A. The posture change between the turning direction X and the twisting direction Z is achieved by a ball joint as described later. For this reason, the vertical axis V that defines the turning direction X is not limited to one vertical axis, but is inclined between the vertical axis (V in the figure) and the horizontal axis H through the center of the ball. It should be appreciated that it includes innumerable vertical axes. Further, the extension axis E that defines the torsional direction Z is not limited to the same axis extending on the same line as the arm axis A, and is inclined between the center of the ball (E in the drawing) and the horizontal axis H. It should be appreciated that it includes innumerable vertical axes.
[0023]
As shown in FIGS. 11 and 12, between the arm 7 and the illuminating body 8, a ball means 42 provided with a ball portion 41 on the support shaft 40 and an intermediate means 45 are disposed. , A socket portion 43 for holding the ball portion 41, extension shaft portions 44, 44 extending from the socket portion to both sides, and support shaft portions 61, 61 further extending from the extension shaft portion.
[0024]
The ball means 42 inserts the support shaft 40 into a cylindrical portion 46 formed at the tip of the inner arm 27 and is fixed in a retaining shape by a pin or the like, and is fixed in a non-rotatable manner in the illustrated example. Project from the inner arm 27. At this time, the cylindrical shaft 47 is extrapolated to the neck portion of the support shaft 40, and the cylindrical shaft 47 is rotatably fitted in a large-diameter annular wall portion 48 whose diameter is increased in the vicinity of the opening of the cylindrical portion 46. Yes.
[0025]
The intermediate means 45 is configured by joining a pair of halved split bodies 45a and 45b formed of a flexible synthetic resin in a palmed state. That is, a pair of socket pieces 43a and 43b each having a spherical recess that is sandwiched and held between the ball portions 41 by coupling and fastening the divided bodies 45a and 45b by fastening connection means 49 including bolts and nuts. The socket portion 43 is configured by the above, and the extension shaft portion 44 is configured by a pair of extension shaft piece portions 44a and 44b extending from the socket piece portions 43a and 43b. Further, the extension shaft piece portion 44a, The support shaft portion 61 is constituted by a pair of support shaft piece portions 61a and 61b extended from 44b.
[0026]
As shown in FIGS. 16 and 17, the half-divided divided bodies 45a and 45b have a pair of support shaft pieces in a state where the ball part 41 is held between the socket pieces 43a and 43b and held together. On the other hand, a locking surface 62 is formed to contact and lock the opposing surfaces of 61a and 61b. On the opposing surfaces of the pair of socket pieces 43a and 43b and the opposing surfaces of the pair of extension shaft pieces 44a and 44b, respectively. Non-locking surfaces 63 and 64 that are spaced apart from each other through a gap d are formed, and through-holes 65 are provided in the extension shaft pieces 44a and 44b for inserting the fastening connection means 49. The through hole 65 includes a nut receiving opening 65b into which the nut is non-rotatably fitted in the extension shaft piece portion 44b disposed on the support shaft 40 side of the ball means 42, and is disposed on the distal end side of the ball portion 41. A bolt head receiving opening 65a for rotatably fitting the head of the bolt is provided in the extended shaft piece 44a.
[0027]
As shown in FIG. 17, the peripheral surface of the ball portion 41 of the ball means 42 is spherical, whereas the spherical concave portions of the socket pieces 43 a and 43 b are not true spherical and are not on the non-locking surface 63. The socket pieces 43a and 43b are gradually formed so that the gaps s are formed between the inner surfaces of the socket pieces 43a and 43b and the peripheral surface of the ball portion 41 in a region near the non-locking surface 63. Is formed.
[0028]
The intermediate means 45 configured by joining the split bodies 45 a and 45 b has a larger diameter of the support shaft portion 61 than the extension shaft portion 44, and the space between the support shaft portions 61 rather than the extension shaft portion 44. Different diameter step portions 66 are provided.
[0029]
Therefore, when the pair of divided bodies 45a and 45b are held together with the ball part 41 held between the socket piece parts 43a and 43b, the supporting shaft piece parts 61a and 61a contact the locking surface 62 with each other. On the other hand, the socket pieces 43a and 43b and the extension shaft pieces 44a and 44b form a gap d by the non-locking surfaces 63 and 64, respectively. Therefore, in this state, the intermediate means 45 is assembled by inserting and fastening the fastening connecting means 49 made of bolts and nuts into the through holes 65 of the extension shaft pieces 44a and 44b. At this time, the frictional resistance between the socket portion 43 and the ball portion 41 can be adjusted by adjusting the fastening force of the fastening connecting means 49, and the lighting body 8 is placed in the turning direction X and the twisting direction Z described above. It is possible to set the stiffness of movement when changing the posture to be optimum.
[0030]
The extension shaft portion 44 and / or the support shaft portion 61 of the assembled intermediate means 45 are pivotally supported by bearing means 50, 50 provided in the lighting body 8. In the case of the illustrated example, as shown in FIGS. 11 and 14A, a neck portion 34c extending from the back of a synthetic resin shade 34, and a fixing means 34d such as a screw covering the neck portion 34c from the lower side. Rib walls 34e and 34f (see FIG. 12) that are opposed to each other are provided on each of the lower covers 34b made of synthetic resin that are fixed by the above, and are formed on each of the rib walls 34e and 34f. The bearing means 50 is configured by making the substantially semicircular cutouts face each other, and a portion of the extension shaft portion 44 adjacent to the different diameter step portion 66 is axially supported by the bearing means 50 so that the different diameter step portion 66 is supported. Is adapted to the side surface of the bearing means 50. The relationship between the intermediate means 45 and the bearing means 50 is such that the extension shaft portion 44 is pivotally supported by the bearing means 50 as shown in the figure, and the support shaft portion 61 is pivotally supported by the bearing means 50. In addition, both the extension shaft portion 44 and the support shaft portion 61 may be configured to be axially supported by the bearing means 50.
[0031]
As shown in FIG. 11, pressure adjusting means 53 is provided in the vicinity of one bearing means 50, and the pressure adjusting means 53 is provided on the neck 34c of the illuminating body 8, as shown in FIGS. A fixed bearing portion 51 fixedly provided; a heat-resistant lining material 68 provided on the fixed bearing portion 51; and a movable bearing portion 52 disposed to face the lining material 68. Between the movable bearing portion 52, the support shaft portion 61 of the intermediate means 45 is rotatably held.
[0032]
As shown in FIG. 13, the fixed bearing portion 51 includes a synthetic resin rib 51 a integrally formed on the neck portion 34 c of the illuminating body 8, and an arc-shaped cutout portion along the peripheral surface of the support shaft portion 61 is formed on the rib 51 a. 51b is formed. As shown in FIG. 11, a pair of substantially parallel ribs 51 a, 51 a is disposed so as to intersect the support shaft portion 61.
[0033]
The heat-resistant lining material 68 is formed by press-molding a zinc plate or other metal plate 68a in a circular arc shape in cross section, straddling the parallel ribs 51a, 51a of the fixed bearing portion 51, and It is made to correspond to the circular arc-shaped notch 51b. As shown in FIG. 14, a tongue piece 68 b is extended at one end of the metal plate 68 a, and the tongue piece 68 b is locked to a locking portion 69 provided on the neck portion 34 c of the illuminating body 8. In the case of the illustrated example, the locking portion 69 has a small-diameter projection 69b protruding from a boss 69a suspended from the neck portion 34c, and a small hole 68c of the tongue piece 68b is engaged with the small-diameter projection 69b.
[0034]
As shown in FIG. 13, the movable bearing portion 52 is made of a metal plate such as an iron plate or a steel plate formed by bending an arcuate concave bent portion 52c that holds the support shaft portion 61 between the wing portions 52a and 52b. One wing 52a is fixed to the neck 34c of the illuminating body 8 by a fixing means 70 such as a screw. In the case of the illustrated example, the screw constituting the fixing means 70 is screwed into the boss hole 51c of the boss formed integrally with the rib 51a constituting the fixed bearing portion 51, and the fastening means 55 is provided on the other wing portion 52b. Yes. In the case of the illustrated example, the fastening means 55 includes a screw shaft 54 inserted downward into a boss portion 34g formed on the neck portion 34c of the illuminating body 8 and having a protruding tip penetrated through the wing portion 52b. A fastening portion 55a having a nut screwed to the screw shaft 54 and an operation portion 55b attached to the fastening portion 55a are configured, and the operation portion 55b is moved downward from the lower cover 34b of the illuminating body 8. Protruding. Therefore, when the fastening portion 55a is advanced with respect to the screw shaft 54 by picking and rotating the operation portion 55b, the wing portion 52b is tensioned and the peripheral surface of the support shaft portion 61 is tightened by the concave curved portion 52c. . On the other hand, when the fastening portion 55a is retracted on the screw shaft 54, the tightening force of the concavely curved portion 52c on the peripheral surface of the support shaft portion 61 is loosened. Therefore, the pressure adjusting means 53 not only prevents the lighting body 8 from hanging down in the swing direction Y due to its own weight, but also allows the movement of the lighting body 8 when the user changes the posture of the lighting body 8 with respect to the swing direction Y. Can be set for optimal stiffness. If the metal plate constituting the movable bearing portion 52 is formed by a leaf spring, the support shaft portion 61 is automatically and positively loosened by the restoring force of the leaf spring when the fastening portion 55a is retracted. be able to.
[0035]
When rotating the illuminating body 8 in the swing direction Y, if the movable bearing portion 52 of the pressure adjusting means 53 is firmly tightened to the support shaft portion 61, the support shaft portion 61 is strongly pressed against the lining material 68. Therefore, a large frictional resistance is generated on the sliding contact surface between the support shaft portion 61 and the lining material 68. In this regard, when the support shaft portion 61 is directly supported on the notch 51b of the fixed bearing portion 51, the synthetic resin is generated by frictional heat generated when the illuminating body 8 is frequently rotated in the swinging direction Y. According to the embodiment of the present invention, there is a risk of melting the fixed bearing portion 51 made of heat, and the heat-resistant metal plate 68a is formed between the notch portion 51b and the support shaft portion 61 of the fixed bearing portion 51. Since the lining material 68 is provided, there is no such danger.
[0036]
Further, since the lining material 68 made of the metal plate 68a and having a circular arc cross section can support the peripheral surface of the support shaft portion 61 in a wide area, it is not necessary to form the fixed bearing portion 51 itself thickly, as described above. It is sufficient if the ribs 51a and 51a are used, so that the synthetic resin material can be saved and the molding can be easily performed without problems such as sink marks in the synthetic resin molding.
[0037]
By the way, if the lighting fixture 1 is used for a long time and the posture of the lighting body 8 is repeatedly changed in the turning direction X and the twisting direction Z, the frictional resistance between the socket portion 43 and the ball portion 41 gradually decreases, and the lighting body 8 turns. In this case, the socket pieces 43a and 43b are re-fixed with respect to the ball portion 41 by re-tightening the bolts of the fastening connecting means 49 in the user. It is only necessary to tightly fasten and adjust the movement of the illuminating body 8 to be optimal. In the case of the illustrated example, as shown in FIG. 11, the illuminating body 8 has a neck portion 34 c including the lower cover 34 b formed with a concave portion 67 that is bent inward with the bearing means 50, 50 therebetween. When the posture of the illuminating body 8 is changed so as to hang downward as indicated by a chain line 2, the posture of the concave portion 67 is changed from a horizontal posture to a vertical posture, and the front space of the intermediate means 45 is opened. Through the space, the bolt of the fastening connecting means 49 can be operated from the front of the luminaire 1 by a screwdriver or other tool means. Instead of the recess 67, for example, a hole or the like through which a tool such as a screwdriver can be inserted from the outside of the illumination body 8 toward the bolt may be provided. In addition to the driver engaging groove, the bolt head may be provided with an engaging groove such as a coin and other rotation operation means.
[0038]
When the fastening connecting means 49 is fastened for the adjustment, as described above, the gap d is formed by the non-locking surfaces 63 and 64, so that the socket pieces 43a and 43b and the extension shaft piece 44a, 44b is suitably fastened to increase the frictional resistance between the socket part 43 and the ball part 41. On the other hand, since the supporting shaft piece portions 61a and 61a always contact and lock the locking surface 62, the outer diameter of the supporting shaft portion 61 is reduced by fastening the fastening connecting means 49. The bearing means 50 is always preferably pivotally supported regardless of the presence or absence of fastening.
[0039]
In the case of the illustrated embodiment, the locking surface 62 is provided over the entire length of the support shaft pieces 61a and 61a, and when the extension shaft pieces 44a and 44b are fastened by the fastening connecting means 49, as shown in FIG. The portion of the locking surface 62 near the different diameter step portion 66 forms the fulcrum p, so that the shaft ends of the support shaft piece portions 61a and 61a are expanded as shown by the arrow k in the figure. Then, the support shaft portion 61 is brought into pressure contact with the pressure adjusting means 53. Note that in order to prevent the formation of the fulcrum p and the above-described reduction in the diameter of the bearing means 50, the locking surface 62 extends over the entire length of the support shaft pieces 61a and 61a. It is not necessary to provide it, and it should be provided at least at a location near the extension shaft pieces 44a, 44b (location near the different diameter step portion 66 in the figure).
[0040]
As apparent from the above, a ball joint is formed between the arm 7 and the illuminating body 8 by the socket portion 43 of the intermediate means 45 and the ball portion 41 of the ball means 42. Therefore, due to the freedom of the ball joint, the illuminating body 8 can be changed in posture in the swiveling direction X, the swinging direction Y, and the twisting direction Z in the respective directions and in the direction in which they are combined. The embodiment may be configured as such.
[0041]
However, in the illustrated embodiment, only the posture change with respect to the turning direction X and the torsional direction Z can be performed by the ball joint, and the posture change with respect to the swing direction Y can be performed by the extension shaft portion 44 and / or the support shaft portion 61 and the bearing. It is configured to be made possible by a pivot type swinging rotation means comprising means 50.
[0042]
As shown in FIG. 11, the socket piece 43b of one divided body 45b of the intermediate means 45 has a control hole 56 through which the cylindrical shaft 47 inserted on the neck of the support shaft 40 of the ball means 42 is inserted. Yes. Therefore, the control hole 56 is formed as a long hole extending in the lateral direction, so that the intermediate means 45 can be rotated in the turning direction X.
[0043]
However, as shown in FIG. 12, the control hole 56 constitutes the engaging means 57 in which the upper and lower edges are engaged with the cylindrical shaft 47 so as to prevent the rotation of the intermediate means 45 in the swing direction Y. In the case of the illustrated example, a flat shaft portion 47 a obtained by cutting the upper and lower portions of the cylindrical shaft 47 is fitted into the control hole 56. Therefore, according to the configuration of the illustrated embodiment, the lighting body 8 does not hang down in the swinging direction Y due to its own weight at the ball joint portion, and the posture change of the lighting body 8 with respect to the swinging direction Y can be performed on both sides of the ball joint. This is achieved by a pivot type swinging and pivoting means comprising an extension shaft portion 44 and a bearing means 50 provided on the opposite side.
[0044]
A conducting wire for supplying a current to the light source body 35 of the illuminating body 8 is guided from the illuminating body 8 through the hollow portion of the arm 7 to the groove 20 of the column 6 and guided to the floor surface. For this reason, if the illuminating body 8 is freely rotatable in the torsional direction Z by the ball joint, the lead wire is twisted between the illuminating body 8 and the arm 7, and there is a risk of disconnection. Therefore, a stopper means 58 is provided between the ball means 42 and the intermediate means 45 to limit the rotation range of the intermediate means 45 in the twisting direction Z. In the case of the illustrated embodiment, as shown in FIGS. 12 and 15, a projecting piece 59 is provided on the outer peripheral surface of the cylindrical shaft 47, and the inner periphery of the large-diameter annular wall portion 48 that rotatably receives the cylindrical shaft 47. Receiving pieces 60a and 60b are provided on the surface at intervals in the circumferential direction. In the case of the illustrated example, when the intermediate means 45 is in a substantially horizontal posture, the protruding piece 59 is in an upward posture as shown in FIG. 15, and a pair of receiving pieces 60 a and 60 b are on the left and right sides of the protruding piece 59. Are arranged at intervals. Accordingly, when the intermediate means 45 is rotated in the clockwise direction from this state, the protruding piece 59 of the cylindrical shaft 47 that rotates integrally with the intermediate means 45 by the engaging means 57 contacts the right receiving piece 60b. As a result, the rotation of the intermediate means 45 in the clockwise direction is stopped. On the contrary, when the intermediate means 45 is rotated in the counterclockwise direction, the projecting piece 59 of the cylindrical shaft 47 that rotates integrally with the intermediate means 45 is brought into contact with the left receiving piece 60a by the engaging means 57. As a result, the rotation of the intermediate means 45 in the counterclockwise direction is stopped.
[0045]
【The invention's effect】
According to the present invention, in the configuration in which the posture of the illuminating body 8 can be changed by pivotally supporting the supporting shaft part 61 on the bearing means 50 of the illuminating body 8, the peripheral surface of the support shaft part 61 is pressed in an adjustable manner. Pressure adjusting means 53 is provided, and a support shaft part 61 is rotatably held between a fixed bearing part 51 having an arcuate cutout part 51 b and a movable bearing part 52, and is movable by a fastening means 55. Since the bearing portion 52 is configured to be pressed against the peripheral surface of the support shaft portion 61 in an adjustable manner, it is possible to adjust the hardness of movement when the user changes the posture of the illuminating body 8 to an optimum state. is there.
[0046]
At this time, if the movable bearing portion 52 is configured by a leaf spring, the blade piece portion 52b is elastically supported by the fastening portion 55a, and the fastening portion 55a prevents the fastening portion 55a from freely rotating and loosening. In addition, the support 61 is fastened by advancing the fastening means 55, while the support 61 is automatically and positively activated by the restoring force of the leaf spring if the fastening means 55 is retracted. Can be loosened.
[0047]
By the way, when the support shaft portion 61 is directly supported by the notch portion 51b of the fixed bearing portion 51, the synthetic resin is fixed by the frictional heat generated when the illumination body 8 is frequently rotated in the swinging direction Y. Although there is a risk of melting the bearing portion 51, according to the present invention, the heat-resistant lining material 68 is provided between the notch portion 51b and the support shaft portion 61 of the fixed bearing portion 51. There is no danger and the durability can be satisfied.
[0048]
Moreover, if the lining material 68 is formed of the metal plate 68a having an arc cross section and supports the peripheral surface of the support shaft portion 61 in a wide area range, the fixed bearing portion 51 itself does not need to be formed thick. As shown in the figure, it is possible to form the fixed bearing portion 51 with thin ribs 51a and 51a, and it is possible to save synthetic resin material, and it is easy to mold without problems such as sink marks in the synthetic resin molding. .
[0049]
Further, according to the present invention, the ball means 42 having the ball portion 41 protruding from the arm 7, the bearing means 50 provided in the illuminating body 8, and the ball means 42 and the bearing means 50 are interposed. Intermediate means 45, and the ball joint 41 and the ball part 41 of the intermediate means 45 constitute a ball joint that can change the posture of the lighting body 8 in the turning direction X and the twist direction Z. There is a feature in that a swinging rotation means that makes it possible to change the posture of the illuminating body 8 in the swing direction Y by the support shaft portion 61 is provided. Therefore, by the ball joint, the vertical axis V that defines the turning direction X is not limited to one vertical axis, but passes through the center of the ball and tilts between the vertical axis (V in FIG. 18) and the horizontal axis H. The extension axis E defining the torsional direction Z is not limited to the same axis extending on the same line as the arm axis A, and passes through the center of the ball and is coaxial (E in FIG. 18) and the horizontal axis H. Innumerable vertical axes that are inclined between the illuminating body 8 and the illuminating body 8 can be changed flexibly and freely. Moreover, since the pivoting means as described above is constituted by the support shaft portion 61 of the intermediate means 45 and the bearing means 50, 50 of the illuminating body 8, the posture change of the illuminating body 8 with respect to the swinging direction Y can be smoothly performed. In this case, since the illuminating body 8 is constituted by the shaft portion and the bearing, the rotation range can be formed in a wide range. For example, the illuminating body 8 is positioned at the solid line shown in FIG. In addition to being able to rotate from the position of the chain line to the position of the chain line, it can also be configured to be able to rotate from the position of the chain line to a position that substantially overlaps the lower side of the arm 7, so that when the arm 7 and the illuminating body 8 are assembled, Compactness is possible.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a desk equipped with a lighting apparatus of the present invention.
FIG. 2 is a longitudinal side view showing a first mounting form when the lighting fixture of the present invention is mounted on a desk.
FIG. 3 is a longitudinal side view showing a second mounting form when the lighting fixture of the present invention is mounted on a desk.
FIG. 4 is a longitudinal side view showing a third mounting configuration when the lighting fixture of the present invention is mounted on a desk.
5A and 5B show a mounting portion of a lighting fixture with respect to a desk, where FIG. 5A is an enlarged view of a portion A in FIG. 3, and FIG. 5B is an enlarged view of a portion B in FIG.
FIG. 6 is a rear view of the luminaire showing a mounting portion of the luminaire with respect to the bookshelf of the desk, with the back plate of the bookshelf cut away.
7A and 7B show a column of a lighting fixture, in which FIG. 7A is an enlarged sectional view taken along line CC in FIG. 6, and FIG. 7B is an enlarged sectional view taken along line DD in FIG.
FIG. 8 is a cross-sectional view showing a connecting portion between an arm and an illuminating body in the lighting fixture of one embodiment of the present invention.
9 is an enlarged cross-sectional view taken along line EE of FIG.
10 is an enlarged sectional view taken along line FF in FIG. 8. FIG.
FIG. 11 is an enlarged cross-sectional view showing one embodiment of the ball joint and the swinging rotation means.
12 is an enlarged sectional view taken along line JJ of FIG.
13 is an enlarged cross-sectional view taken along the line GG of FIG. 11, and is a cross-sectional view showing one embodiment of the pressure adjusting means of the present invention.
14 shows one embodiment of the pressure adjusting means of the present invention, (A) is an enlarged sectional view taken along line LL in FIG. 11, and (B) is an enlarged perspective view showing an example of a lining material. It is.
15 is an enlarged cross-sectional view taken along the line HH of FIG.
FIG. 16 is an enlarged cross-sectional view showing an embodiment of the intermediate means.
FIG. 17 is an enlarged longitudinal sectional view showing a socket portion of the intermediate means.
FIG. 18 is a perspective view illustrating a turning direction X, a swinging direction Y, and a twisting direction Z of the illuminating body in the lighting fixture.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Desk 4 Lower bookcase 5 Upper bookcase 6 Upper column 7 Arm 8 Illuminating body 26 Outer arm 27 Inner arm 34 Shade 34b Lower cover 34c Neck part 35 Light source body 40 Support shaft 41 Ball part 42 Ball means 43 Socket part 44 Extension Shaft portion 45 Intermediate means 49 Fastening connection means 50 Bearing means 51 Fixed bearing portion 51a Rib 51b Notch portion 52 Movable bearing portion 53 Pressure adjusting means 61 Support shaft portion 68 Lining material 68a Metal plate 68b Tongue piece 68c Small hole 69 Locking portion 69a Boss part 69b Protrusion

Claims

An illuminating body at the tip of the arm, with respect to the turning direction X about the vertical axis intersecting the arm axis, the swinging direction Y about the horizontal axis intersecting the arm axis, and the twisting direction Z about the extension axis of the arm axis A lighting fixture having a posture changeable freely, the ball means having a ball portion protruding from the arm, the bearing means provided on the lighting body, and interposed between the ball means and the bearing means An intermediate means and a pressure adjusting means provided between the intermediate means and the illuminating body are provided, and the intermediate means can change the posture of the illuminating body in the turning direction X and the twisting direction Z by holding the ball portion. And a support shaft portion that extends laterally from the socket portion and is pivotally supported by the bearing means of the illumination body so that the posture of the illumination body can be changed in the swing direction Y. The pressure adjusting means is fixed to the lighting body. And a synthetic resin fixed bearing portion formed with an arc-shaped cutout portion along the peripheral surface of the support shaft portion, and a heat-resistant lining material having an arc-shaped cross section provided along the cutout portion of the fixed bearing portion, The movable shaft member is disposed so as to face the lining material, and the movable shaft member is rotated around the support shaft portion in a state where the support shaft portion is rotatably held between the movable bearing portion and the lining material. A lighting device comprising fastening means for pressing the surface in an adjustable manner.

The fixed bearing part fixed to the illuminating body is constituted by substantially parallel synthetic resin ribs arranged so as to cross the support shaft part, and a heat-resistant lining material is provided on each of the parallel ribs. is constituted by an arcuate cutout arcuate cross-section of the metal plate which is straddled in part, to claim 1, characterized by comprising locking the tongue and extending from the metal plate to the locking portion of the illumination body The luminaire described.

The movable bearing portion is constituted by a leaf spring in which a concave curved portion is formed between a pair of wing portions, and the leaf spring is rotatably held between the concave curved portion and the lining material. The lighting apparatus according to claim 1 or 2 , wherein one of the wing parts is fixed to the illuminating body, and the other wing part is connected to the illuminating body via an advancing and retracting fastening means.