JP4351853B2

JP4351853B2 - Floodlight

Info

Publication number: JP4351853B2
Application number: JP2003085347A
Authority: JP
Inventors: 徳仁吉森; 雅之田口; 淳也森安
Original assignee: Light Boy Co Ltd
Current assignee: Light Boy Co Ltd
Priority date: 2003-03-26
Filing date: 2003-03-26
Publication date: 2009-10-28
Anticipated expiration: 2023-03-26
Also published as: JP2004127903A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば工事現場、競技用グランド、キャンプ場や各種イベント会場等の照明として使用される投光機に関し、詳しくは、伸縮支柱の上端に装備した照明装置の角度調整機構の改良に関する。
【０００２】
【従来の技術】
従来、例えば特許文献１に開示されるように、発電機を搭載する台車に立設した伸縮支柱の上端に、電球の光を反射器により前方へ向けて照射するスポット型の照明装置を所要数装備した投光機が知られている。
【０００３】
また本願出願人は、特許文献２に開示されるように、眩しさを感じさせることなく、且つ、光を広い範囲に照射することができるバルーン型の照明装置を備えた新規な投光機を先に提供した。
【０００４】
さらに本願出願人は、特許文献３に記載されるように、前記バルーン型の照明装置と、該照明装置に電力を供給する発電機と、前記照明装置が上端に装備された自立式の伸縮支柱からなる組み立て・分解可能な簡易型の投光機を先に提案した。
【０００５】
【特許文献１】
特開平８−１７５３９２号公報
【特許文献２】
特開２００３−３６７０９号公報
【特許文献３】
特許第３０９２４５３号（実願２００２−５４７６号）
【０００６】
これら特許文献に記載される投光機は、伸縮支柱を伸張させることで照明装置の高さを任意に設定する一方、伸縮支柱を収縮させたコンパクトな状態で搬送、保管をするようになっている。
【０００７】
【発明が解決しようとする課題】
ところで、この種投光機は、伸縮支柱の上端に照明装置を前後，左右方向へ回動自在に取り付けて、投光角度を任意に調整し得ると共に、搬送，保管の際には照明装置が伸縮支柱に対して前方へ略９０度折れ曲がる状態にして、よりコンパクトな状態で搬送，保管がなされるようになっている。
しかしながら、照明装置は相当の重量物であるため、前後方向へ回動操作した場合、その重みで急激に回動してしまう虞れがある。
【０００８】
本発明はこの様な従来事情に鑑みてなされたもので、その目的とする処は、伸縮支柱上端に装着した照明装置を前後方向へ回動させる際、該照明装置が自身の重みで急激に回動してしまうような虞れのない、安全性に優れた新規な投光機を提供することにある。
【０００９】
【課題を解決するための手段】
以上の目的を達成するために本発明は、発電機（１，１’）から供給される電力で発光する照明装置（４）を伸縮支柱（３，３’）に装備してなる投光機であって、前記伸縮支柱上端に取り付けた角度調整ユニット（ａ）により前記照明装置を少なくとも前後方向へ回動自在に支持してなり、
前記角度調整ユニット（ａ）は、伸縮支柱側に取り付けられて前後方向への回動中心となる第一の支軸（１０）と、該第一の支軸に回動自在に外装され前後方向へ回動自在に支持される筒部材（１１）と、該筒部材の前方への回動を付勢する前側付勢部材（１２）と、前記筒部材の後方への回動を付勢する後側付勢部材（１３）と、前記筒部材と前記照明装置を連結する連結部材（１４）を備え、
前記前側と後側の付勢部材（１２，１３）の付勢力をほぼ同等とし、これら付勢部材により前記照明装置（４）の前後方向への回動を緩衝するよう形成したことを特徴とする。
【００１０】
このように形成した場合、照明装置（４）が重量物であったとしても、前後の付勢部材（１２，１３）によって前後方向への回動に対する緩衝作用が働き、該照明装置がその重みで急激に回動してしまうことを防止することができる。
【００１１】
本発明において、前記伸縮支柱（１，１’）の上端に、左右方向への回動中心となる第二の支軸（１５）を設け、該第二の支軸により前記第一の支軸（１０）と筒部材（１１）を左右方向へ回動自在に支持して、前記照明装置（４）を左右方向へも回動自在に形成することが好ましい。
【００１２】
本発明に係る投光機の具体的態様として、前記伸縮支柱（３）が発電機（１）を搭載する台車（２）上に立設されている投光機をあげることができる。
【００１３】
本発明に係る投光機の具体的態様として、前記伸縮支柱（３’）が自立手段（５０）を有する自立式の伸縮支柱である投光機をあげることができる。
【００１４】
本発明に係る投光機の具体的態様として、前記照明装置（４）が、バルーン（５）内に、電球（６）と、該電球を保持する保持枠（７）と、前記バルーンを膨らませるためのバルーン膨張手段（８）を備えたバルーン型の照明装置である投光機をあげることができる。
【００１５】
また本発明に係る投光機の具体的態様として、前記照明装置が、電球の光を反射器により前方へ向けて照射するスポット型の照明装置である投光機をあげることができる。
【００１６】
【発明の実施の形態】
以下、本発明に係る投光機の実施形態の例を、図面を参照して説明する。
図１には、発電機１を搭載する台車２上に伸縮支柱３を立設すると共に、その伸縮支柱３に照明装置４を装備した投光機Ａを示し、照明装置４は、伸縮支柱３の上端に取り付けた角度調整ユニットａにより前後方向と左右方向へ回動自在に支持されている。
【００１７】
台車２は前後左右に車輪を備えたもので、車体ベースに搭載する発電機１を移動不能に保持する係止手段を備えることが好ましい。
【００１８】
台車２の後部に立設された伸縮支柱３は、基管柱３ａに対して遂次内径を小さくした少なくとも一つ（本例では二つ）の中管柱３ｂ，３ｃを順次上下摺動可能に遊嵌して伸張、収縮自在とすると共に、滑車，ワイヤ，ウインチを組み合わせた昇降手段、或いはガスダンパーなどの昇降手段を内蔵してなり、これら昇降手段の作動で各中管柱３ｂ，３ｃを順次上下摺動させることによってその長さを調節し、照明装置４の高さを適宜に設定し得るように形成されている。
【００１９】
最上位の中管柱３ｃの上端には角度調整ユニットａが取り付けられ、該角度調整ユニットａに、照明装置４が着脱可能に装着されている。
【００２０】
照明装置４は、バルーン５内に、電球６、該電球６を保持する保持枠７、バルーン５を膨らませるための空気吸込み装置（バルーン膨張手段）８などを備えたもので、通電ケーブル９を介して発電機１から供給される電力を電球６と空気吸込み装置８に供給し、バルーン５を膨らませた状態で電球６を点灯して、その照射光をバルーン５を通過させることで眩しさを低減し、且つ、光を広い範囲に照射するよう形成されている。
【００２１】
角度調整ユニットａは、図２〜図８に示すように、伸縮支柱３側に取り付けられて前後方向への回動中心となる第一の支軸１０と、該第一の支軸１０に回動自在に外装され前後方向へ回動自在に支持される筒部材１１と、該筒部材１１の前方への回動を付勢する前側ばね（前側付勢部材）１２と、筒部材１１の後方への回動を付勢する後側ばね（後側付勢部材）１３と、筒部材１１と照明装置４を連結する連結軸（連結部材）１４と、最上位の中管柱３ｃの上端に突設され第一の支軸１０と筒部材１１を左右方向へ回動自在に支持する第二の支軸１５から形成されている。
【００２２】
第一の支軸１０は、略円筒状に形成された軸体の長さ方向中央部分に第二の支軸１５が回動自在に挿入される軸孔１０ａを備え、第二の支軸１５により左右方向へ回動自在に支持されている。
また第一の支軸１０は、前記軸孔１０ａを挟むよう内設された左右の隔壁１０ｂ，１０ｂを有し、これら隔壁１０ｂと周壁１０ｃで区画される凹部１０ｄ，１０ｄを左右両側に備えており、これら凹部１０ｄ内に前側と後側の付勢部材１２，１３が装填されている。
【００２３】
筒部材１１は、第一の支軸１０に回動自在に外装する本体部１１ａの下面に第二の支軸１５が挿入される軸孔１１ｂを備え、第一の支軸１０により前後方向へ回動自在に支持されると共に、第一の支軸１０と一体に左右方向へ回動するようになっている。前記本体部１１ａの上面には、隆起部１１ｃで囲まれる装着孔１１ｄが、前記軸孔１０ａ，１１ｂと同心状に形成されており、該装着孔１１ｄに、筒部材１１と照明装置４を連結する連結軸１４の下端部が螺合等の連結手段で固定されている。
【００２４】
本体部１１ａの周壁には軸方向に沿うスリット２０を形成してその内径を縮小，拡開可能とし、該スリット２０の上縁と下縁に沿って上下の突出部２１ａ，２１ｂを設けると共に、それら突出部２１ａ，２１ｂにはネジ孔２２ａ，２２ｂが同心状に形成されている。
【００２５】
それらネジ孔２２ａ，２２ｂには、ハンドル２３の基端部に設けたネジ部２４が螺合しており、ハンドル２３の正方向への回動操作で突出部２１ａ，２１ｂが近接して本体部１１ａの内径が縮小し、逆方向の回動操作で突出部２１ａ，２１ｂが離間して本体部１１ａの内径が拡開するようになっている。
前記第一の支軸１０の周壁にも軸方向に沿うスリット２５を形成してその内径を縮小，拡開可能としてある。
【００２６】
そうして、前記ハンドル２３を正方向へ回動操作すると本体部１１ａの内径が縮小し、これにより第一の支軸１０と本体部１１ａの摩擦抵抗が高まって筒部材１１の前後方向への回動が規制されると共に、第一の支軸１０の内径も縮小して軸孔１０ａが変形するに伴い、第二の支軸１５と軸孔１０ａの摩擦抵抗が高まって、第一の支軸１０の（筒部材１１の）左右方向への回動が規制されるようになっている。
【００２７】
一方、ハンドル２３を逆方向へ回動操作すると本体部１１ａの内径が拡張し、これにより第一の支軸１０と本体部１１ａの摩擦抵抗が低くなって筒部材１１の前後方向への回動が自在となると共に、第一の支軸１０の内径も拡張して、第一の支軸１０の（筒部材１１の）左右方向への回動が自在となるよう形成されている。
【００２８】
前側と後側の付勢部材１２，１３は所定の弾発力を有するつるまきバネであり、これら付勢部材１２，１３は、凹部１０ｄを塞ぐよう筒部材１１にビス止め３０された蓋部材３１の裏面に突出する軸３２に巻装すると共に、一端１２ａ，１３ａを第一の支軸１０に係止し、他端１２ｂ，１３ｂを筒部材１１の係合壁１１ｅに係止して、第一の支軸１０の左右両側の凹部１０ｄ内に収容されている。
【００２９】
前側と後側の付勢部材１２，１３はその付勢力（弾発力）がほぼ同等であり、前側付勢部材１２により筒部材１１の前方への回動を付勢し、後側付勢部材１３により筒部材１１の後方への回動を付勢すると共に、それら付勢力をほぼ均等のものとして、筒部材１１の（照明装置４の）前後方向への回動を緩衝するようになっている。
【００３０】
第二の支軸１５には、第一の支軸１０にネジ止めしたボルト３３の先端が係合して第一の支軸１０の抜けを防止する係合溝３４が周設されると共に、その係合溝３４には回り止めビス３５をネジ止めし、係合溝３４内に突出するビス頭３６とボルト３３先端の係合により、第一の支軸１０と筒部材１１の（照明装置４の）水平方向への回動範囲を適宜に規制するようになっている。
【００３１】
さらに、筒部材１１の本体部１１ａの周壁には、第二の支軸１５に係合して、筒部材１１の（照明装置４の）前後方向への回動範囲を、連結軸１４がほぼ垂直に立ち上がる位置に規制する面４１と、第二の支軸１５の下端に嵌合したカラー４０に係合して、連結軸１４がほぼ水平に倒れた位置の範囲（約９０度の範囲）に規制する面４２との間にわたって溝４３が形成されている。
【００３２】
連結軸１４は、下端に設けたねじ部１４ａを装着孔１１ｄに螺合させて筒部材１１に取り付けられると共に、上端部に、照明装置４の保持枠７の下面板７ａに固定した筒部７ｂを外装しネジ止め４４して、筒部材１１と照明装置４を連結している。
【００３３】
以上のように構成した本例の投光機Ａは、伸縮支柱３を伸張させて照明装置４を適宜高さに設置し、且つ発電機１の作動でバルーン５を膨らませると共に電球６を点灯させ、その光をバルーン５を通して柔らかな光に変えて、バルーン５の外側全周方向に対し投光することができるので、眩しさを感じさせることなく、光を広い範囲に照射することができる（図１参照）。
【００３４】
また、バルーン５の外周に遮光シートを張るなどして投光範囲を限定した場合は、角度調整ユニットａによりその投光方向，投光角度を適宜に調整することができる。
すなわち、ハンドル２３の操作で筒部材１１の本体部１１ａと第一の支軸１０の内径を拡張させることで、筒部材１１の前後方向と左右方向への回動を自在として、照明装置４を適宜角度に位置させ、その後、ハンドル２３の操作で筒部材１１の本体部１１ａと第一の支軸１０の内径を縮小させることで、筒部材１１の前後方向と左右方向への回動を規制（ロック）して、照明装置４の投光方向，投光角度を任意に設定することができる（図６，図７参照）。
【００３５】
工事現場等において照明場所を変える際には、台車２により発電機１、伸縮柱３、照明装置４を一緒に移動することができるので、取扱いが容易であると共に任意の場所に設置できる。
【００３６】
投光作業終了後は、伸縮支柱３を収縮させ、且つ発電機１を停止してバルーン５を収縮させると共に電球６を消灯し、さらに、角度調整ユニットａにより連結軸１４を９０度倒して、照明装置４が台車２に搭載した発電機１の上方に位置するコンパクトな状態で、搬送，保管を行うことができる（図９参照）。
【００３７】
前記した角度調整作業の際、照明装置４がその重みで急激に前後方向へ回動しようとしても、前後の付勢部材１２，１３によって前後方向への回動に対する緩衝作用が働き、安全に作業を行うことができる。
【００３８】
図１０には、前記台車２を備えず、自立手段５０を備えた自立式の伸縮支柱３’により照明装置４を支持する投光機Ａ’を示す。それ以外の構成部分は前記投光機Ａと同様のため、重複する説明、図示や省略し、相違点のみ以下に述べる。
【００３９】
この例の伸縮支柱３’は、基管柱３ａ’に対して遂次内径を小さくした少なくとも一つ（この例では二つ）の中管柱３ｂ’，３ｃ’を順次上下摺動可能に遊嵌して伸張、収縮自在とすると共に、基管柱３ａ’の上端開口部、中管柱３ｂ’の上端開口部に、各開口部の径を縮径させるべくその開口部に螺合するカラー部材６０を装着し、各中管柱３ｂ’，３ｃ’の摺動を規制し得るようにして、その長さ（高さ）を任意に調整できるよう形成されている。
【００４０】
自立手段５０は、基管柱３ａ’の下部に所要数（この例では三つ）の接地板５１を等間隔ごとに装着したもので、夫々の接地板５１は、基管柱３ａ’に沿って立ち上がる折り畳み位置と、接地面に沿って横たわる使用位置との間を回動自在となるよう、支軸５２により基管柱３ａ’に枢着して折り畳み自在に取り付けられている。
５３は使用位置にある接地板５１の回動を規制するリンク杆で、その両端部を基管柱３ａ’の下部、接地板５１の中間部にそれぞれ枢着５４ａ，５４ｂされている。
【００４１】
このような構成になるこの例の投光機Ａ’は、各接地板５１を開いた状態で伸縮支柱３’を自立させ、伸縮支柱３’を伸張させてその長さを任意に調節することで照明装置４を適宜高さに位置させ、小型の発電機１’から供給される電力でバルーン５を膨らませると共に電球６を点灯して、眩しさを低減させた光を広い範囲に照射することができる。
また、前記した投光機Ａと同様にして、角度調整ユニットａによりその投光方向，投光角度を適宜に調整することができる。
【００４２】
使用後は、伸縮支柱３’を収縮させ、且つ発電機１’を停止してバルーン５を収縮させると共に電球６を消灯し、さらに、角度調整ユニットａにより連結軸１４を９０度倒して、照明装置４が折り畳まれたコンパクトな状態で、専用のケースに収容するなどして搬送，保管を行うことができる。
【００４３】
因みに、図１に示す投光機Ａは主に、幹線道路や高速道路での夜間工事等の比較的高出力の明かりが要求される現場で使用され、図１０に示す投光機Ａ’は主に、比較的低出力の明かりが要求される現場で使用される。
【００４４】
尚、本発明に係る投光機おいて、照明装置４は図示したバルーン型のものに限定されず、電球の光を反射器により前方へ向けて照射するスポット型の照明装置であってもよく、また電球の数も任意である。またバルーン型の照明装置において、バルーンの形状は図示例に限定されず、略横長太鼓形状、略円錐台形状、逆円錐台形状のものや、人形、動物、建築物、キャラクター等の各種形状のものとしても良い。
【００４５】
以上、本発明に係る投光機の実施形態の例を図面を参照して説明したが、本発明は図示例に限定されるものではなく、特許請求の範囲の各請求項に記載された技術的思想の範疇において各種の変更が可能であることは言うまでもない。
【００４６】
【発明の効果】
本発明は以上説明したように構成したので、以下に記載されるような効果を奏する。
（請求項１）
照明装置（４）が重量物であったとしても、前後の付勢部材（１２，１３）によって前後方向への回動に対する緩衝作用が働き、該照明装置がその重みで急激に回動してしまうことを防止して、安全に作業することができる。
【００４７】
（請求項２）
前記効果に加え、筒部材（１１）を左右方向へ回動自在に支持することで、照明装置（４）の左右方向への回動も自在とし、投光角度、投光範囲などをより幅広く調整することができる。
【００４８】
（請求項３）
前記効果に加え、台車（２）により発電機（１）、伸縮柱（３）、照明装置（４）を一緒に移動することができるので、取扱いが容易であると共に任意の場所に設置できるなどの効果がある。
【００４９】
（請求項４）
前記効果に加え、電球（６）を点灯させ、その光をバルーン（５）を通して柔らかな光に変えて、バルーン（５）の外側全周方向に対し投光することができるので、眩しさを感じさせることなく、光を広い範囲に照射することができるなどの効果がある。
【図面の簡単な説明】
【図１】本発明に係る投光機の実施形態の一例を示す斜視図で、使用状態を表す。
【図２】図１に示す投光機の角度調整ユニットの拡大斜視図。
【図３】（イ）同角度調整ユニットの正面図、（ロ）同角度調整ユニットの縦断正面図。
【図４】同角度調整ユニットの縦断側面図。
【図５】同角度調整ユニットの横断平面図。
【図６】同角度調整ユニットの前後方向への回動状態を示す一部切欠側面図で、（イ）はほぼ垂直に立ち上がる状態、（ロ）はほぼ水平に倒れた状態を表す。
【図７】同角度調整ユニットの前後方向への回動状態を示す斜視図。
【図８】同角度調整ユニットの分解斜視図。
【図９】図１に示す投光機の収容状態を示す側面図。
【図１０】本発明に係る投光機の実施形態の他例を示す斜視図。
【符号の説明】
Ａ，Ａ’：投光機
１，１’：発電機
２：台車
３，３’：伸縮支柱
４：照明装置
５：バルーン
６：電球
７：保持枠
８：バルーン膨張手段
ａ：角度調整ユニット
１０：第一の支軸
１１：筒部材
１２：前側ばね（前側付勢部材）
１３：後側ばね（後側付勢部材）
１４：連結軸（連結部材）
１５：第二の支軸[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a projector that is used as illumination for, for example, a construction site, a competition ground, a campsite, various event venues, and the like, and more particularly, to an improvement in an angle adjustment mechanism of an illumination device provided at the upper end of an extendable support column.
[0002]
[Prior art]
Conventionally, as disclosed in, for example, Patent Document 1, a required number of spot-type illumination devices that irradiate light from a light bulb forward by a reflector on the upper end of a telescopic column installed on a carriage on which a generator is mounted. Equipped floodlights are known.
[0003]
In addition, as disclosed in Patent Document 2, the applicant of the present application provides a novel projector equipped with a balloon-type illumination device that can irradiate light over a wide range without causing glare. Provided earlier.
[0004]
Further, as described in Patent Document 3, the applicant of the present application provides the balloon-type illumination device, a generator for supplying power to the illumination device, and a self-supporting telescopic support column equipped with the illumination device at the upper end. We first proposed a simple floodlight that can be assembled and disassembled.
[0005]
[Patent Document 1]
JP-A-8-175392 [Patent Document 2]
JP 2003-36709 A [Patent Document 3]
Patent No. 3092453 (No. 2002-5476)
[0006]
The projectors described in these patent documents set the height of the lighting device arbitrarily by extending the telescopic struts, while being transported and stored in a compact state in which the telescopic struts are contracted. Yes.
[0007]
[Problems to be solved by the invention]
By the way, this kind of projector can attach a lighting device to the upper end of the telescopic column so as to be rotatable in the front-rear and left-right directions, and can arbitrarily adjust the light projection angle. It is configured to be bent approximately 90 degrees forward with respect to the telescopic strut, and to be transported and stored in a more compact state.
However, since the illumination device is a heavy object, there is a possibility that when the lighting device is rotated in the front-rear direction, the lighting device may be suddenly rotated by the weight.
[0008]
The present invention has been made in view of such a conventional situation. The purpose of the present invention is that when the lighting device mounted on the upper end of the telescopic support column is rotated in the front-rear direction, the lighting device suddenly increases with its own weight. An object of the present invention is to provide a new projector that is excellent in safety and does not have a fear of rotating.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a projector in which an illuminating device (4) that emits light with electric power supplied from a generator (1, 1 ') is mounted on a telescopic column (3, 3'). The angle adjustment unit (a) attached to the upper end of the telescopic column supports the lighting device so as to be rotatable at least in the front-rear direction.
The angle adjustment unit (a) is attached to the telescopic support column side and serves as a center of rotation in the front-rear direction, and a first support shaft (10) that is rotatably mounted on the first support shaft. A cylindrical member (11) that is rotatably supported, a front biasing member (12) that biases forward rotation of the cylindrical member, and biasing backward rotation of the cylindrical member. A rear urging member (13), and a connecting member (14) for connecting the tubular member and the lighting device;
The urging forces of the front and rear urging members (12, 13) are substantially equal, and these urging members are formed so as to buffer the rotation of the illumination device (4) in the front-rear direction. To do.
[0010]
When formed in this way, even if the illuminating device (4) is a heavy object, the front and rear urging members (12, 13) act as a buffering action against rotation in the front-rear direction, and the illuminating device has its weight. It is possible to prevent a sudden rotation.
[0011]
In the present invention, a second support shaft (15) serving as a rotation center in the left-right direction is provided at the upper end of the telescopic support column (1, 1 '), and the first support shaft is provided by the second support shaft. Preferably, (10) and the cylindrical member (11) are supported so as to be rotatable in the left-right direction, and the illumination device (4) is formed so as to be rotatable in the left-right direction.
[0012]
As a specific aspect of the projector according to the present invention, a projector in which the telescopic column (3) is erected on a carriage (2) on which a generator (1) is mounted can be cited.
[0013]
As a specific aspect of the projector according to the present invention, a projector in which the telescopic column (3 ′) is a self-supporting telescopic column having a self-supporting means (50) can be given.
[0014]
As a specific aspect of the projector according to the present invention, the lighting device (4) inflates the bulb (6), a holding frame (7) for holding the bulb, and the balloon in the balloon (5). A projector that is a balloon-type illumination device including a balloon inflating means (8) can be used.
[0015]
Further, as a specific aspect of the projector according to the present invention, a projector in which the illumination device is a spot-type illumination device that irradiates light of a light bulb forward by a reflector can be given.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a projector according to the present invention will be described with reference to the drawings.
FIG. 1 shows a projector A in which a telescopic column 3 is erected on a carriage 2 on which a generator 1 is mounted and a lighting device 4 is mounted on the telescopic column 3. The lighting device 4 includes a telescopic column 3. Is supported by an angle adjustment unit a attached to the upper end of the lens so as to be rotatable in the front-rear direction and the left-right direction.
[0017]
The carriage 2 is provided with wheels on the front, rear, left, and right, and preferably includes locking means for holding the generator 1 mounted on the vehicle body base so as not to move.
[0018]
The telescopic column 3 erected at the rear part of the carriage 2 can slide up and down sequentially at least one (two in this example) middle tube columns 3b and 3c whose inner diameter is successively reduced with respect to the base tube column 3a. It is loosely fitted and can be expanded and contracted, and it includes lifting / lowering means combining a pulley, a wire and a winch, or a lifting / lowering means such as a gas damper. The middle pipe columns 3b and 3c are operated by the lifting / lowering means. The length of the lighting device 4 is adjusted by sliding it up and down sequentially, and the height of the lighting device 4 can be set appropriately.
[0019]
An angle adjustment unit a is attached to the upper end of the uppermost middle tube pillar 3c, and the illumination device 4 is detachably attached to the angle adjustment unit a.
[0020]
The illuminating device 4 includes a light bulb 6, a holding frame 7 for holding the light bulb 6, an air suction device (balloon inflating means) 8 for inflating the balloon 5, and the like. The electric power supplied from the generator 1 is supplied to the light bulb 6 and the air suction device 8, the light bulb 6 is turned on in a state where the balloon 5 is inflated, and the irradiation light is passed through the balloon 5 to reduce glare. It is formed to reduce and irradiate light over a wide range.
[0021]
As shown in FIGS. 2 to 8, the angle adjustment unit a is attached to the telescopic support column 3 side and serves as a center of rotation in the front-rear direction. A cylindrical member 11 that is externally movably supported and pivotably supported in the front-rear direction, a front spring (front biasing member) 12 that biases forward rotation of the cylindrical member 11, and a rear side of the cylindrical member 11 A rear spring (rear urging member) 13 for urging the rotation of the tube member, a connecting shaft (connecting member) 14 for connecting the tubular member 11 and the lighting device 4, and an upper end of the uppermost middle tube pillar 3c. It is formed from a second support shaft 15 that protrudes and supports the first support shaft 10 and the cylindrical member 11 so as to be rotatable in the left-right direction.
[0022]
The first support shaft 10 includes a shaft hole 10a into which a second support shaft 15 is rotatably inserted in a central portion in the length direction of a shaft body formed in a substantially cylindrical shape. Is supported so as to be rotatable in the left-right direction.
The first support shaft 10 has left and right partition walls 10b and 10b provided so as to sandwich the shaft hole 10a. The first support shaft 10 includes recesses 10d and 10d defined by the partition wall 10b and the peripheral wall 10c on the left and right sides. The urging members 12 and 13 on the front side and the rear side are loaded in these recesses 10d.
[0023]
The cylindrical member 11 includes a shaft hole 11b into which the second support shaft 15 is inserted in the lower surface of the main body portion 11a that is rotatably mounted on the first support shaft 10. While being supported so as to be rotatable, the first support shaft 10 and the first support shaft 10 are rotated in the left-right direction. A mounting hole 11d surrounded by a raised portion 11c is formed on the upper surface of the main body 11a concentrically with the shaft holes 10a and 11b, and the cylindrical member 11 and the lighting device 4 are connected to the mounting hole 11d. The lower end portion of the connecting shaft 14 is fixed by connecting means such as screwing.
[0024]
The slit 20 along the axial direction is formed on the peripheral wall of the main body 11a so that the inner diameter can be reduced and expanded, and upper and lower protrusions 21a and 21b are provided along the upper and lower edges of the slit 20, Screw holes 22a and 22b are formed concentrically in the protruding portions 21a and 21b.
[0025]
A screw portion 24 provided at a proximal end portion of the handle 23 is screwed into the screw holes 22a and 22b, and the projecting portions 21a and 21b are brought close to each other by a rotation operation of the handle 23 in the positive direction. The inner diameter of 11a is reduced, and the projecting portions 21a and 21b are separated by a rotation operation in the opposite direction, so that the inner diameter of the main body portion 11a is expanded.
A slit 25 along the axial direction is also formed on the peripheral wall of the first support shaft 10 so that the inner diameter thereof can be reduced and expanded.
[0026]
Then, when the handle 23 is rotated in the forward direction, the inner diameter of the main body portion 11a is reduced, thereby increasing the frictional resistance between the first support shaft 10 and the main body portion 11a and moving the cylindrical member 11 in the front-rear direction. As the rotation is restricted and the inner diameter of the first support shaft 10 is reduced and the shaft hole 10a is deformed, the frictional resistance between the second support shaft 15 and the shaft hole 10a is increased, and the first support shaft 10 is deformed. The rotation of the shaft 10 in the left-right direction (of the cylindrical member 11) is restricted.
[0027]
On the other hand, when the handle 23 is turned in the reverse direction, the inner diameter of the main body portion 11a is expanded, thereby reducing the frictional resistance between the first support shaft 10 and the main body portion 11a, and turning the cylindrical member 11 in the front-rear direction. And the inner diameter of the first support shaft 10 is expanded so that the first support shaft 10 can be rotated in the left-right direction (of the cylindrical member 11).
[0028]
The front and rear urging members 12, 13 are helical springs having a predetermined elastic force, and these urging members 12, 13 are lid members 30 screwed to the cylindrical member 11 so as to close the recess 10d. 31 is wound around a shaft 32 projecting from the back surface of 31 and one end 12a, 13a is locked to the first support shaft 10, and the other end 12b, 13b is locked to the engaging wall 11e of the cylindrical member 11, The first support shaft 10 is accommodated in the concave portions 10d on both the left and right sides.
[0029]
The urging members 12 and 13 on the front side and the rear side have substantially the same urging force (elastic force), and the front urging member 12 urges the cylinder member 11 to rotate forward, thereby urging the rear side. The member 13 urges the tubular member 11 to rotate backward, and the urging force is made substantially equal to buffer the tubular member 11 in the longitudinal direction (of the lighting device 4). ing.
[0030]
The second support shaft 15 is provided with an engagement groove 34 that is engaged with the tip of a bolt 33 screwed to the first support shaft 10 to prevent the first support shaft 10 from coming off. A locking screw 35 is screwed to the engagement groove 34, and the first spindle 10 and the cylindrical member 11 (illumination device) are engaged by engagement between a screw head 36 protruding into the engagement groove 34 and the tip of the bolt 33. 4) The range of rotation in the horizontal direction is appropriately regulated.
[0031]
Further, on the peripheral wall of the main body portion 11a of the tubular member 11, the connecting shaft 14 is substantially engaged with the second support shaft 15 so that the pivoting range of the tubular member 11 in the front-rear direction (of the lighting device 4) is approximately. A range (position of about 90 degrees) where the connecting shaft 14 is tilted almost horizontally by engaging with the collar 41 fitted to the lower end of the second support shaft 15 and the surface 41 that is restricted to a vertically rising position. A groove 43 is formed between the surface 42 and the surface 42 to be regulated.
[0032]
The connecting shaft 14 is attached to the cylindrical member 11 by screwing a screw portion 14a provided at the lower end into the mounting hole 11d, and a cylindrical portion 7b fixed to the lower surface plate 7a of the holding frame 7 of the lighting device 4 at the upper end portion. And the cylindrical member 11 and the lighting device 4 are connected.
[0033]
The floodlight A of the present example configured as described above extends the telescopic support column 3 to install the lighting device 4 at an appropriate height, and inflates the balloon 5 by the operation of the generator 1 and lights the light bulb 6. Then, the light can be changed to soft light through the balloon 5 and projected to the outer circumferential direction of the balloon 5, so that the light can be irradiated over a wide range without feeling dazzling. (See FIG. 1).
[0034]
Moreover, when the light projection range is limited by, for example, putting a light shielding sheet on the outer periphery of the balloon 5, the angle adjustment unit a can appropriately adjust the light projection direction and the light projection angle.
That is, by operating the handle 23, the inner diameter of the main body portion 11a of the cylindrical member 11 and the first support shaft 10 is expanded so that the cylindrical member 11 can be freely rotated in the front-rear direction and the left-right direction. By positioning the tube member 11 at an appropriate angle and then reducing the inner diameter of the main body 11a of the tube member 11 and the first support shaft 10 by operating the handle 23, the rotation of the tube member 11 in the front-rear direction and the left-right direction is restricted. (Lock), and the light projecting direction and light projecting angle of the illumination device 4 can be arbitrarily set (see FIGS. 6 and 7).
[0035]
When changing the illumination location at a construction site or the like, since the generator 1, the telescopic column 3, and the illumination device 4 can be moved together by the carriage 2, it is easy to handle and can be installed at an arbitrary location.
[0036]
After completion of the light projecting operation, the telescopic support column 3 is contracted, the generator 1 is stopped, the balloon 5 is contracted and the light bulb 6 is extinguished, and the connecting shaft 14 is tilted 90 degrees by the angle adjusting unit a. The lighting device 4 can be transported and stored in a compact state located above the generator 1 mounted on the carriage 2 (see FIG. 9).
[0037]
Even when the illumination device 4 suddenly rotates in the front-rear direction with the weight during the angle adjustment operation described above, the front and rear urging members 12, 13 provide a buffering action against the rotation in the front-rear direction, and work safely. It can be performed.
[0038]
FIG. 10 shows a projector A ′ that does not include the carriage 2 but supports the lighting device 4 by a self-supporting telescopic support column 3 ′ provided with a self-supporting means 50. Since the other components are the same as those of the projector A, overlapping explanations, illustrations and omissions will be omitted, and only the differences will be described below.
[0039]
In this example, the telescopic column 3 ′ has at least one (two in this example) middle tube columns 3b ′ and 3c ′ having a successively smaller inner diameter than the base tube column 3a ′ so that it can slide up and down sequentially. A collar that can be fitted and extended and contracted, and is screwed into the upper end opening of the base tube column 3a ′ and the upper end opening of the middle tube column 3b ′ to reduce the diameter of each opening. The member 60 is mounted, and the length (height) can be arbitrarily adjusted so that the sliding of the middle tube pillars 3b ′ and 3c ′ can be regulated.
[0040]
The self-supporting means 50 has a required number (three in this example) of ground plates 51 mounted at equal intervals on the lower part of the main tube column 3a ′, and each of the ground plates 51 extends along the main tube column 3a ′. Are pivotally attached to the base tube column 3a ′ by the support shaft 52 so as to be freely pivotable between a folding position that rises up and a use position lying along the grounding surface.
Reference numeral 53 denotes a link rod for restricting the rotation of the ground plate 51 in the use position. Both ends of the link rod are pivotally attached 54a and 54b to the lower portion of the base tube column 3a 'and the intermediate portion of the ground plate 51, respectively.
[0041]
The floodlight A ′ of this example having such a configuration allows the telescopic column 3 ′ to stand on its own with each ground plate 51 opened, and the telescopic column 3 ′ to extend to arbitrarily adjust its length. Then, the lighting device 4 is positioned at an appropriate height, the balloon 5 is inflated with the electric power supplied from the small generator 1 ′, and the light bulb 6 is turned on to irradiate light with reduced glare over a wide range. be able to.
Further, similarly to the projector A described above, the light projecting direction and the light projecting angle can be appropriately adjusted by the angle adjusting unit a.
[0042]
After use, the telescopic strut 3 'is contracted, the generator 1' is stopped, the balloon 5 is contracted and the light bulb 6 is extinguished, and the connecting shaft 14 is tilted 90 degrees by the angle adjusting unit a to illuminate. In a compact state in which the device 4 is folded, it can be transported and stored by being housed in a dedicated case.
[0043]
Incidentally, the projector A shown in FIG. 1 is mainly used in a field where a relatively high output light is required such as night construction on a main road or a highway, and the projector A ′ shown in FIG. Mainly used in the field where relatively low power light is required.
[0044]
In the projector according to the present invention, the illuminating device 4 is not limited to the illustrated balloon type, and may be a spot type illuminating device that irradiates the light from the light bulb forward with a reflector. The number of light bulbs is also arbitrary. Further, in the balloon-type lighting device, the shape of the balloon is not limited to the illustrated example, and the shape of the substantially horizontally long drum shape, the substantially truncated cone shape, the inverted truncated cone shape, and various shapes such as dolls, animals, buildings, characters, etc. It is good as a thing.
[0045]
As mentioned above, although the example of embodiment of the projector which concerns on this invention was demonstrated with reference to drawings, this invention is not limited to the example of illustration, The technique described in each claim of a claim It goes without saying that various changes can be made within the scope of the philosophy.
[0046]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
(Claim 1)
Even if the illuminating device (4) is heavy, the front and rear urging members (12, 13) act as a buffer against the rotation in the front-rear direction, and the illuminating device is suddenly rotated by its weight. It is possible to work safely.
[0047]
(Claim 2)
In addition to the above effects, by supporting the cylindrical member (11) so as to be rotatable in the left-right direction, the lighting device (4) can be freely rotated in the left-right direction, and the light projection angle, the light projection range, etc. can be broadened. Can be adjusted.
[0048]
(Claim 3)
In addition to the above effects, the generator (1), the telescopic column (3), and the lighting device (4) can be moved together by the carriage (2), so that it is easy to handle and can be installed at any place. There is an effect.
[0049]
(Claim 4)
In addition to the above effects, the light bulb (6) is turned on, and the light can be changed into soft light through the balloon (5), and can be projected toward the outer circumferential direction of the balloon (5). There is an effect that light can be irradiated over a wide range without making it feel.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an embodiment of a projector according to the present invention and shows a use state.
FIG. 2 is an enlarged perspective view of an angle adjustment unit of the projector shown in FIG.
3A is a front view of the same angle adjustment unit, and FIG. 3B is a longitudinal front view of the same angle adjustment unit.
FIG. 4 is a vertical side view of the same angle adjustment unit.
FIG. 5 is a cross-sectional plan view of the same angle adjustment unit.
FIGS. 6A and 6B are partially cutaway side views showing a rotation state of the same angle adjustment unit in the front-rear direction, where FIG. 6A shows a state in which the angle adjustment unit rises substantially vertically, and FIG.
FIG. 7 is a perspective view showing a rotation state of the same angle adjustment unit in the front-rear direction.
FIG. 8 is an exploded perspective view of the same angle adjustment unit.
9 is a side view showing a housing state of the projector shown in FIG. 1. FIG.
FIG. 10 is a perspective view showing another example of the embodiment of the projector according to the present invention.
[Explanation of symbols]
A, A ′: Projector 1, 1 ′: Generator 2: Cart 3, 3 ′: Telescopic support column 4: Lighting device 5: Balloon 6: Light bulb 7: Holding frame 8: Balloon inflation means a: Angle adjustment unit 10 : First support shaft 11: cylindrical member 12: front spring (front biasing member)
13: Rear spring (rear biasing member)
14: Connecting shaft (connecting member)
15: Second spindle

Claims

A projector that is equipped with an illuminating device (4) that emits light with electric power supplied from a generator (1, 1 ') on a telescopic column (3, 3'), and is an angle attached to the upper end of the telescopic column The adjustment unit (a) supports the lighting device so as to be rotatable at least in the front-rear direction,
The angle adjustment unit (a) is attached to the telescopic support column side and serves as a center of rotation in the front-rear direction, and a first support shaft (10) that is rotatably mounted on the first support shaft. A cylindrical member (11) that is rotatably supported, a front biasing member (12) that biases forward rotation of the cylindrical member, and biasing backward rotation of the cylindrical member. A rear urging member (13), and a connecting member (14) for connecting the tubular member and the lighting device;
A floodlight formed such that the urging forces of the front and rear urging members (12, 13) are substantially equal, and the urging member (4) is configured to cushion the rotation in the front-rear direction by the urging members.

A second support shaft (15) serving as a center of rotation in the left-right direction is provided at the upper end of the telescopic support column (3), and the first support shaft (10) and the cylindrical member ( 11) The projector according to claim 1, wherein the lighting device (4) is formed so as to be rotatable in the left-right direction, while being supported so as to be rotatable in the left-right direction.

The floodlight according to claim 1 or 2, wherein the telescopic strut (3) is erected on a carriage (2) on which a generator (1) is mounted.

The lighting device (4) includes a light bulb (6), a holding frame (7) for holding the light bulb, and a balloon inflating means (8) for inflating the balloon in the balloon (5). The projector according to any one of claims 1 to 3, wherein the projector is a type of illumination device.