JP3965350B2 - Telescopic prop - Google Patents

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JP3965350B2
JP3965350B2 JP2002290668A JP2002290668A JP3965350B2 JP 3965350 B2 JP3965350 B2 JP 3965350B2 JP 2002290668 A JP2002290668 A JP 2002290668A JP 2002290668 A JP2002290668 A JP 2002290668A JP 3965350 B2 JP3965350 B2 JP 3965350B2
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cylinder
pulley
support
wire
cylindrical body
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JP2003201774A (en
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弘一 平田
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Nippon Steel Metal Products Co Ltd
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Nipponn Steel and Sumikin Metal Products Co Ltd
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Description

【０００１】
【発明の属する技術分野】
この発明は、茶園の防霜ファン用支柱、道路や飛行場などの照明用支柱、道路の防風、防雪柵用の支柱、或いは球技場の防球フェンス用支柱など、大規模施設用で背の高い大型支柱であって、内外に嵌め合わせて伸縮自在に組み合わされた複数の支柱筒体から成り、伸縮ストロークが大きく、ワイヤーと滑車方式により伸縮される伸縮式支柱の技術分野に属する。
【０００２】
【従来の技術】
従来、大規模施設用で背の高い大型支柱をワイヤーと滑車方式により伸縮式として構成した支柱に関しては、下記するような先行技術が公知に属する。
【０００３】
（１）特許第２６３４７７６号公報（発行日：平成９年７月３０日）の図１１に記載された伸縮支柱は、基管柱上端の内側に滑車を設け、同基管柱の外側へ設置したウインチから引き出し前記滑車へ巻き掛けたワイヤーの他端を、基管柱の内側へ嵌め込んだ中管柱の下端部へ止着し、同中管柱の上端内側にも滑車を設け、一端を基管柱へ止着して中管柱の外側を立ち上がらせたワイヤーを中管柱上端の滑車へ巻き掛けたあと、中管柱の内側へ嵌め込んだ内管柱の下端へ止着して成り、前記ワイヤーをウインチで巻き取り又は巻き出すことにより、基管柱に対して中管柱及び内管柱が一斉に出入りして伸縮される構成である。しかし、この伸縮支柱は、基管柱の内側へ嵌め込む中管柱の外径、及び、中管柱の内側へ嵌め込む内管柱の外径をそれぞれ滑車の直径分だけ小さくしなければならず、多段管の構成とし難い。また、管と管の隙間が前記のように大きい分だけガタつき易く、安定性に乏しい欠点が認められる（特許文献１参照）。
【０００４】
（２）上記欠点の解決を目的とした、同公報の図２と図３に記載された伸縮式支柱は、ワイヤーと滑車方式による伸縮機構を、ガスダンパーによりダブルストロークの伸縮動作をさせる構成である。即ち、基管柱の中心部にガスダンパーを垂直上向きに配置し、その上端に設けた滑車には一端を基管柱に止着したワイヤーを巻き掛け、同ワイヤーの他端はガスダンパーの外周に配置した補助管柱の下端へ止着している。補助管柱の管内上部にも滑車を設け、一端を基管柱に止着して補助管柱内を立ち上がらせたワイヤーを前記補助管柱上端の滑車へ巻き掛け、他端は第３の管柱の下端へ止着した構成とされている。したがって、ガスダンパーを伸縮させると、基管柱に対して補助管柱と第３の管柱とが一斉に出入りして伸縮される。よって、基管柱に対する補助管柱及び第３の管柱の直径を滑車の直径分だけ小さくする問題点は解決されたことになる（特許文献１参照）。
【０００５】
（３）次に、特公平６−６３３８３号公報に記載された伸縮支柱は、最も外側の基管柱の下部外周面に設置したウインチから引き出したワイヤーを、同基管柱の上部外周面に設けた吊り滑車へ巻き掛けた上で、基管柱の内側へ嵌め込んだ中管柱の下部内周面に設けた支持滑車へ巻き掛けて上方へＵターンさせ、同中管柱の上部内周面に設けた吊り滑車へ巻き掛ける。以下同様に、前記ワイヤーは更に同中管柱の内側へ嵌め込まれた第２の中管柱の下部内周面に設けた支持滑車へ巻き掛けて上方へＵターンさせる構成を繰り返して内管柱へ到達させ、その下部内周面へ止着している。この伸縮支柱の場合、基管柱の上部外周面に設けた吊り滑車から中管柱の下部内周面に設けた支持滑車へ巻き掛けるワイヤーを通すために、基管柱には中管柱の伸縮ストロークに相当する長さのスリットを上下方向に設けなければならない。同様に、中管柱の吊り滑車から更にその内側の第２の中管柱の支持滑車へ巻き掛けるワイヤーを、更に第２の中管柱の吊り滑車から内管柱へ導入するワイヤーを通すスリットが夫々必要である。のみならず、滑車の直径による内外の管柱の径差を解消する手段として、前記のスリットは内向きの滑車を通す幅で形成されている（特許文献２参照）。実用新案登録第３０２１７８９号公報に記載された伸縮支柱も同様な構成である（特許文献３参照）。
【０００６】
（４）実開平５−６０４７号公報に記載された伸縮支柱は、上記（３）のスリットを無用にする工夫として、各管柱の上端に取り付けた吊り滑車及び下端に取り付けた支持滑車をそれぞれ、管壁の厚さを跨いで内外の管柱の隙間へワイヤーを配置できるように傾斜させて設置している（特許文献４参照）。
【０００７】
（５）特開平１１−６２８８４号公報に記載された伸縮支柱は、外側の固定管と、その内側へ嵌め込んだ移動管との組み合わせからなり、移動管の上端部に伸縮用の駆動部（モータ或いはウインチなど）を設置し、移動管の管内に固定管との間で相対移動を発生するように設置した送りネジ軸機構、或いはラック・ピニオン機構、又は一端を固定管の上部に止着したチエンとスプロケットによる滑車式機構などを、前記駆動部により駆動して伸縮させる構成である（特許文献５参照）。
【０００８】

【特許文献１】
特許第２６３４７７６号公報 （第２頁 第１１図）

【特許文献２】
特公平６−６３３８３号公報 （第３−４頁 第２，３図）

【特許文献３】
実用新案登録第３０２１７８９号公報 （第２頁 第２図）

【特許文献４】
実開平５−６０４７号公報 （第４−５頁 第２，４図）

【特許文献５】
特開平１１−６２８８４号公報 （第２−５頁 第２図）
【０００９】
【発明が解決しようとする課題】
（ｉ）上述した（１）の伸縮支柱に認められる欠点は云うに及ばず、その欠点を解決した上記（２）の伸縮式支柱の場合でも、ガスダンパーを伸縮動作させると、基管柱に対して補助管柱と第３の管柱とが一斉に出入りして伸縮されるから、補助管柱または第３の管柱のいずれか一方だけを伸縮動作させたいと希望しても、無理な構成である。また、補助管柱と第３の管柱とがダブルストロークの伸縮動作を行う構成ではあるが、伸縮ストロークの基本は、あくまでもガスダンパーのストロークの大きさに支配されている。同公報の３頁左欄の段落番号［００１０］の１６行〜１７行目には、流通品であるガスダンパーの最大ストロークは３５０mm程度と紹介されているとおり、３ｍないし６ｍ程度の伸縮を望む大型支柱の伸縮柱としては、甚だ実用性に乏しいものである。
【００１０】
（ii）上記（３）の伸縮支柱は、ウインチを用いたワイヤーと滑車方式による構成であるから、上記ストロークの問題点は小さい。しかし、外側の管柱から内側の管柱へとワイヤーを通し、或いは内向きの滑車さえも通すために、各移動管柱の管壁の上下方向に長くスリットを形成しなければならない。したがって、スリット形成の加工に多大な手間と費用がかかる上に、スリットの存在が支柱としての外観意匠を悪くする。更に、管柱にスリットを形成した断面欠損の分だけ強度や剛性が低下し、耐荷重性能が悪い。或いは前記の耐荷重性能を補完するためには、必要以上に大型の支柱を構成しなければならず、コストの面、及びハンドリングの点で不利を免れない。
【００１１】
（iii） 上記（４）に記載した伸縮支柱は、管壁のスリットを無用とした構成の点を評価できるが、各管柱の上下に傾斜させて設けた吊り滑車及び支持滑車の間に巻き掛けるワイヤーは１本の管柱につき同管内で１周回させる必要がある。このように長いワイヤーの移動を順調に行わせるため、内外に嵌め合わせた各管柱はワイヤーの位置とは反対側へ片寄せして滑り移動させる構成（同公報の図２、図４参照）を採用しているが、伸縮動作時の滑り抵抗が大で、駆動手段の負担が大きく、格上のモータ等が必要で高価なものとなる。一方、ワイヤー側には内外の管柱の間にかなり大きな隙間が形成されるのでガタつきの原因となり易い。また、各管柱の上下に傾斜させて設ける吊り滑車及び支持滑車の取り付けのための工作、加工と取り付け作業が面倒であり、ひいては伸縮支柱としての組立作業にも手間がかかるし、メンテナンスも面倒な欠点が認められる。
【００１２】
（iv）上記（５）の伸縮支柱は、一見合理的な構成に思われるし、また、移動管の下端部にガイド用コロを設置した構成を評価できる。しかし、例えば送りネジ軸機構又はラック・ピニオン機構の場合には、移動管の伸縮ストロークと等しい有効長さの送りネジ軸又はラックを必要とし、それが非常に高価である。また、チエンとスプロケットによる機構の場合も含めて、この伸縮支柱は、１段のみの伸縮機構に限定される構成であるから、多段の伸縮機構によって大きな伸縮ストロークを実現することには限界がある。
【００１３】
（ｖ）上記（１）〜（５）の伸縮式支柱は、支柱の最大全高をより高くすると、その分風荷重が増大し、支柱を構成する筒体が大型化且つ大重量化するという問題がある。
【００１４】
（ vi ）本発明の目的は、上記した従来技術の欠点、問題点をことごとく解決したワイヤーと滑車方式の伸縮式支柱を提供することである。更に具体的に説明すると、滑車の存在によって内外の支柱筒体の間に格別の直径差を要求されず、内外の筒体間に滑車及びワイヤーを通すスリットを筒体の壁面に形成する必要がなく、ワイヤーが支柱の外面に露出するのは吊り滑車へ巻き掛けるほんの一部分であって外観意匠に優れること、そして、支柱を最大限度伸張した状態をストッパピンで固定してウインチの負荷を除外したり、移動する複数の支柱筒体の中の１本或いは複数本を任意に選択して一体化した伸縮動作をさせることも可能であり、伸縮の段数やストロークの大きさの設定の自由度が大きく、比較的に安価であり、軽量且つメンテナンスも容易な構成の伸縮式支柱を提供することである。
【００１５】
（ｖ ii ）本発明の次の目的は、より滑らかに垂直方向へ伸縮動作させることができる伸縮式支柱を提供することである。
【００１９】
上述の課題を解決するための手段として、請求項１に記載した発明に係る伸縮式支柱は、
内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱において、
支柱筒体は１本の外側筒体と１本又は複数本の中間筒体及び１本の内側筒体の少なくとも３本から成り、ワイヤーは外側筒体の上端部に設けた吊り滑車を経由させ、中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせ、同中間筒体の内壁面に沿って上方へ立ち上がらせ、同中間筒体の上端に設けた吊り滑車へ巻き掛けて下向きにＵターンさせて内側筒体の下端に設けた支持滑車へ巻き掛け、更に同内側筒体の反対側の下端に設けた支持滑車へ巻き掛けて上向きにターンさせ、前記中間筒体の上端に設けた吊り滑車へ巻き掛けて下向きにＵターンさせ、同中間筒体の内壁面に沿って下方へ降ろし、同中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせたワイヤーの先端部が前記外側筒体の上端部近傍に止着されていること、
外側筒体の上端に設けた前記吊り滑車を経由して外方へ延びるワイヤーを巻き上げ又は巻き下ろす駆動手段が併設されていること、
少なくとも中間筒体及び内側筒体の下端部に、外側の筒体内周面に当たって転がり走るガイドローラが複数設置されていること、
をそれぞれ特徴とする。
【００２０】
請求項２記載の発明は、請求項１に記載した伸縮式支柱において、
内側筒体は、筒体内部に吊り滑車を備えており、
中間筒体の上端に設けた吊り滑車を経て内側筒体の下端に設けた支持滑車へ巻き掛けたワイヤーは、内側筒体の内壁面に沿って立ち上がらさせ、前記内側筒体の吊り滑車へ巻き掛けて下向きに反対側へＵターンさせ、同内側筒体の内側面に沿って下方へ降ろし、同内側筒体の下端に設けた支持滑車へ巻き掛けていることを特徴とする。
【００２２】
請求項３記載の発明は、請求項１又は２に記載した発明に係る伸縮式支柱において、
少なくとも外側筒体及び中間筒体の上端部に、吊り滑車及び誘導滑車を備えた環状の固定バンドが取り付けられていること、
固定バンドは、内側の筒体外周面に外接する直径の筒体を二分したに等しい半割筒状の可動部材と固定部材から成り、可動部材と固定部材はそれぞれの一端側をヒンジ機構により開閉自在に連結され、他端側はボルト、ナットで連結し締め付け可能であること、
固定部材の外周面の上下方向に配置された２本の軸受けプレートの間の上下の位置に吊り滑車と誘導滑車が取り付けられていること、
固定バンドは、その下側フランジが、外側筒体又は中間筒体の上端部に設けたフランジと重ね合わされボルト接合で取り付けられていること、
をそれぞれ特徴とする。
【００２３】
請求項４記載の発明は、請求項１又は２に記載した発明に係る伸縮式支柱において、
少なくとも外側筒体及び中間筒体の上端部に、吊り滑車及び誘導滑車を備えた環状の固定バンドが取り付けられていること、
固定バンドは、内側の筒体の外径と略同径の直径を有する筒体から成り、スプリング付ロックボルトにより締め付け可能とされていること、
固定部材の外周面の上下方向に配置された２本の軸受けプレートの間の上下の位置に吊り滑車と誘導滑車が取り付けられていること、
固定バンドは、その下側フランジが、外側筒体又は中間筒体の上端部に設けたフランジと重ね合わされボルト接合で取り付けられていること、
をそれぞれ特徴とする。
【００２７】
請求項５記載の発明は、請求項１に記載した伸縮式支柱において、
中間筒体又は内側筒体の下端部の一つのガイドローラが、同下端部に設ける支持滑車と共通の支持体で上下の位置に設置されていることを特徴とする。
【００２８】
請求項６記載の発明は、請求項１に記載した伸縮式支柱において、
中間筒体又は内側筒体の下端部の二つのガイドローラが、同下端部に設ける支持滑車と共通の支持体で上下の位置に設置されていることを特徴とする。
【００３０】
【発明の実施形態】
以下に、図面を参照して、請求項１〜６に記載した発明に係る伸縮式支柱の実施形態を説明する。
【００３１】
本発明の基本的な考え方として、伸縮式支柱は、内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱である。支柱筒体は、１本の外側筒体と、１本又は複数本の中間筒体、及び１本の内側筒体の少なくとも３本から成る。前記ワイヤーは、外側筒体の上端部に設けた吊り滑車を経由させ、中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせ、同中間筒体の内壁面に沿って上方へ立ち上がらせ、同中間筒体の上端に設けた吊り滑車へ巻き掛けて下向きにＵターンさせ、同中間筒体の内壁面に沿って下方へ降ろし、同中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせたワイヤーの先端部が前記外側筒体の上端部近傍に止着されている。
【００３２】
この伸縮式支柱には、外側筒体の上端に設けた前記吊り滑車を経由して外方へ延びるワイヤーを巻き上げ又は巻き下ろす駆動手段が併設される。そして、少なくとも前記中間筒体及び内側筒体の下端部に、外側の筒体内周面に当たって転がり走るガイドローラが複数設置されていることを特徴とする（請求項１記載の発明）。
以下、本発明の理解を容易にする参考例と共に本発明の実施形態について逐次説明する。
【００３４】
図１と図２は、本発明の理解に供する参考例であって、内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱の一例を示す。支柱筒体は、具体的には地中に埋設された最も大径の外側筒体１と、その内側の中間筒体２、及び更に内側の第２の中間筒体３、並びに最も内側で最小径の内側筒体４の合計４本の筒体から成る伸縮式支柱を示している。図１は、前記伸縮式支柱を最低位置にまで収縮させた状態を示し、図２は、最高位置まで伸長させた状態をそれぞれ概念的に簡略化して示している。つまり、本発明の伸縮式支柱は、外側筒体１とその内側の中間筒体２、並びに最も内側の内側筒体４の３本を最少の基本構成とし、必要に応じて中間筒体２、３を複数（必要数）用いて多段に構成されるのである。
【００３５】
前記地中に埋設された外側筒体１の上端部に相当する地面上に、ワイヤー６を外側筒体１の吊り滑車の外方で巻き上げ又は巻き下ろす駆動手段としてのウインチ５が設置されている。
【００３６】
前記ウインチ５から引き出された１本のワイヤー６は、外側筒体１の上端部に設けた吊り滑車７を経由させ、中間筒体２の下端に設けた支持滑車８へ巻き掛けて上向きにＵターンさせ、同中間筒体２の内壁面に沿って上方へ立ち上がらせ、同中間筒体２の上端に設けた吊り滑車９へ巻き掛けて下向きにＵターンさせている。そして、第２の中間筒体３の下端に設けた支持滑車１０へ巻き掛けて上向きにＵターンさせ、同第２の中間筒体３の内壁面に沿って上方へ立ち上がらせて、同第２の中間筒体３の上端に設けた吊り滑車１１へ巻き掛けて下向きにＵターンさせている。更に、内側筒体４の下端に設けた支持滑車１２へ巻き掛けて上向きにＵターンさせ、同内側筒体４の内壁面に沿って立ち上がらせたワイヤー６の先端部が同内側筒体４のワイヤー止着具１３へ止着されている。なお、図示例の場合、前記ワイヤー止着具１３は前記内側筒体４内の最上部に設置されているが、この位置に限らない。ワイヤー６を止着できる位置であれば、前記内側筒体４の上下いずれの位置に設けても良い。
【００３７】
図３と図４に、図２中に符号ＩＩＩで指示した部分の構造詳細を示している。即ち、中間筒体２の上端部に、前記吊り滑車９及びこれに付随する誘導滑車１５を備えた環状の固定バンド１４が取り付けられている。要するに、中間筒体２の内壁面に沿って上方へ立ち上がらせたワイヤー６は、前記誘導滑車１５を経由することによって一旦中間筒体２の上端外方へ導き出される。そして、その直上位置に設けた吊り滑車９へ外側から内側へと巻き掛けて中間筒体２の内側へと下向きにＵタ−ンされ、もって第２の中間筒体３の下端に設けた支持滑車１０へはワイヤー６を外側から内側へと巻き掛けて上向きにＵターンさせ、同第２の中間筒体３の内壁面に沿って上方へ立ち上がらせることを可能ならしめている。従って、従来技術の如く外側筒体から内側筒体へワイヤー６を通すためのスリットを筒体壁面に形成することは一切無用である。また、滑車９、１０、１５の直径の分だけ内外の筒体２と３に直径差を設ける必要も無い訳である。
【００３８】
上記の固定バンド１４は、図５と図６に例示し、図７に使用状態を示したように、内側に位置する第２の中間筒体３の外周面に外接する直径の短筒体１４’を直径線方向に二分したに等しい半割筒状の可動部材１４ａと固定部材１４ｂから成る。そして、前記可動部材１４ａと固定部材１４ｂは、それぞれの一端側をヒンジ機構１６により開閉自在に連結され、他端側はボルト１７とナット１８とで連結して強く又は弱く締め付けることが可能に構成されている。
【００３９】
前記固定部材１４ｂを構成する短筒体１４’の外周面の上下方向に平行に配置された２本の軸受けプレート１９、１９の間の上下の位置に、前記吊り滑車９と誘導滑車１５が取り付けられている。
【００４０】
固定バンド１４には、短筒体１４’の上下にフランジ２０と２１を有し、下側フランジ２１が、中間筒体２の上端部に予め溶接等によって設けられたフランジ２２の上に重ね合わされボルト２３による接合で取り付けられている（請求項３記載の発明）。
【００４１】
なお、前記固定バンドは、図５〜７に例示した形態及び構造に限定されない。例えば、図８及び図９に例示したように、各筒体のガタつき防止用のスプリング付ロックボルト４５を備え、且つ内側の中間筒体３の外径と略同径の直径を有する短筒体３４’から成る固定バンド３４を使用して実施することもできる。
【００４２】
この固定バンド３４は、図５に例示した前記固定バンド１４と同様に、短筒体３４’の外周面の上下方向に配置された２本の軸受けプレート３９，３９の間の上下の位置に吊り滑車９と誘導滑車１５とを有する。更に、該固定バンド３４は、短筒体３４’の上下にやはり図５に例示した前記固定バンド１４と同様にフランジ４０，４１を有し、該フランジ４０，４１に設けられた孔４６を介して中間筒体２とボルト接合される（請求項４記載の発明）。
【００４３】
一方、第２の中間筒体３の下端部には、前記支持滑車１０のほか、外側の中間筒体２の内周面に当たって転がり走るガイドローラ２４が、図４に示す例では円周を３等分した１２０度ずつの間隔で３個設置されている。このガイドローラ２４によって中間筒体２と第２の中間筒体３との間のガタつきを解消し、且つ、第２の中間筒体３の伸縮移動を可及的に小さい転がり摩擦の状態で軽く安定して円滑に行わしめるのである。
【００４４】
前記支持滑車１０及びガイドローラ２４の取り付け手段として、図３の場合は、第２の中間筒体３の下端外周面に、中間筒体２の内径よりも少し小径の取り付け用フランジ２５が予め溶接等の手段で固定されている。前記取り付け用フランジ２５の下面に、同取り付け用フランジ２５の外径とほぼ同径でドーナツ形状の取り付け板２６が当てがわれ、下向きのボルト２７で締め付け固定されている。取り付け板２６の下面に、前記ガイドローラ２４が、Ｌ形状をなす２個のブラケット２８、２８をボルト２９により固定して設置されている。
【００４５】
なお、図３及び図４中右側のガイドローラ２４のみは、ブラケット２８を、支持滑車１０と上下の位置に共用する構成で設置されている。そして、前記支持滑車１０の取付け位置においては、上記した取り付け用フランジ２５及びその下面側の取り付け板２６が共に、２個のブラケット２８、２８の間隔と同等な隙間３０を有する不連続円板として構成され、もって前記の隙間３０を通じてワイヤー６が上下方向に貫通する構成とされている。
【００４６】
図３と図４は、図２のIII 部を代表的に示していると説明したが、図２に示す伸縮式支柱において、下方の外側筒体１と中間筒体２の関係、及び上方の第２の中間筒体３と内側筒体４との関係についても、同様に構成されていることを理解されたい。もっとも、内側筒体４の上端に固定バンドを取り付ける必要はない。
【００４７】
上記の構成であるが故に、本発明の伸縮式支柱の現地組立に際しては、図３の例で云えば、予め第２の中間筒体３の下端へ取り付け板２６と共にガイドローラ２４及び支持滑車１０を取り付けておいて、同第２の中間筒体３を中間筒体２の内側へ嵌め込んでゆく。その後に、中間筒体２の上端へ固定バンド１４，３４を取り付ける順序を実施することにより、比較的簡単に組立を行うことができて至便である。勿論、支持滑車１０に対するワイヤー６の巻き掛けは予め先行して行うものとする。なお、図５等に例示した固定バンド１４は、上述したようにヒンジ機構１６によって可動部材１４ａと固定部材１４ｂとを開閉自在に連結しているので、両部材を二つ割り状態に大きく開いて第２の中間筒体３へ抱き付かせる手法により、固定バンド１４の取り付けを容易に行うことが出来る。
【００４８】
本発明に係る伸縮式支柱は、１本のワイヤー６と吊り滑車９及び支持滑車１０とによる一種の倍力機構が構成されているので、図１のように最低位置へ収縮させた状態から、ウインチ５でワイヤー６を巻き取ると、比較的小さい負荷で伸長動作を行わせることができる。支柱の伸長動作は、先ず最小径であるが故に最も軽量な内側筒体４が引き出されて上昇してゆく。そして、図３のように取り付け用フランジ２５上のボルト２７の頭が直上位置の固定バンド１４，３４における下側フランジ２１，４１へ突き当たって上昇限界に到達した段階で、次に軽量な第２の中間筒体３が上昇を始める。第２の中間筒３が前記同様に上昇限界に到達した段階で、最後に最も重い中間筒体２が上昇を開始する順序で伸長動作が行われる。かくして中間筒体２が上昇限界に到達すると、当該支柱は最高位まで伸長されたことになる。図２の実施形態では、１本の筒体の長さを１．６ｍ程度とし、３本の合計で地上４．５ｍ程度の高さまで伸長される構成である。
【００４９】
上記のように最高位まで伸長した支柱は、通常、ウインチ５を停止させてワイヤー６の緊張状態を保持させることにより前記状態が維持される。しかし、この手法では１本の支柱につき１台のウインチ５が必要となり、ウインチ駆動用のモータも含めたコストが支柱の販売価格を圧迫することになる。
【００５０】
その対策として、本発明では次の工夫を行っている。即ち、外側筒体１から引き上げられた中間筒体２、又は中間筒体２から引き上げられた第２の中間筒体３、若しくは第２の中間筒体３から引き上げられた内側筒体４の下端部をそれぞれ、図６又は図７に示したように外側筒体１の上端に設けた固定バンド１４，３４、又は中間筒体２の上端に設けた固定バンド１４，３４を直径線方向に串刺しにしたストッパピン３１により伸縮動作が不能に固定して止めるのである。そのために固定バンド１４，３４の短筒体１４’，３４’には予めピン孔３２，４２が用意されており（図５及び図８を参照）、各筒体の下部にも、前記ピン孔３２，４２と一致する配置でピン孔３３（図３を参照）が用意されている。前記したようにストッパピン３１を串刺し状態に通すと、ウインチ５でワイヤー６を緊張状態に保持する必要がないので、少なくともウインチ駆動用のモータなどは分離可能な持ち回り形式に構成してコストダウンを図ることが可能である。
【００５１】
本発明の上記構成による伸縮式支柱は、次のような使用も可能である。
例えば図５に示した固定バンド１４は、上記したように、図３において内側に位置する第２の中間筒体３の外周面に外接する直径の短筒体１４’を直径線方向に二分したに等しい半割筒状の可動部材１４ａと固定部材１４ｂから成り、前記可動部材１４ａと固定部材１４ｂは一端側をヒンジ機構１６により開閉自在に連結し、他端側はボルト１７とナット１８とで連結して強く又は弱く締め付けることが可能に構成されている。
【００５２】
よって図３の場合では、固定バンド１４の設置法として、固定部材１４ｂの下側フランジ２１のみを中間筒体２のフランジ２２へボルト接合し、可動部材１４ａの下側フランジ２１はボルト接合せず自由な状態としている。そこで、図１の収縮状態において、前記可動部材１４ａを内側の第２の中間筒体３の外周面へボルト１７とナット１８とで予め強く締め付けて固定する。すると摩擦力によって両筒体２と３の間の伸縮動作が止められるから、ウインチ５を駆動して伸長動作を開始した場合、第２の中間筒体３が引き出される場合に、第２の中間筒体３が単独では上昇せず、中間筒体２と共に２本が一体となって上昇動作を行う。よって、この場合の伸縮式支柱の最高位置は２本の筒体による高さに縮小されるのであり、使い勝手に優れる。
【００５３】
上記の作用効果は、図８に示した固定バンド３４においても、同固定バンド３４のスプリング付ロックボルト４５を強く締め付けて前記両筒体２と３の間に摩擦力を生じさせ且つガタつきを防止することにより、同様に奏される（請求項４記載の発明）。
【００５４】
また、上記の作用効果を応用すると、上記した伸長動作において、各筒体が上昇限界に到達した段階で次々に直下の固定バンド１４におけるボルト１７とナット１８、又は固定バンド３４におけるスプリング付ロックボルト４５を強固に締め付けて該固定バンド１４，３４を固定することにより、その伸長状態を維持、固定することも出来るのである。
【００５６】
図１０と図１１は、本発明の理解に供する参考例であって、内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱の一例を収縮又は伸長状態について各々示している。支柱筒体は、上記した図１、図２の参考例と同様に、最大径の外側筒体１と、その内側の中間筒体２，３、並びに最も内側で最小径の内側筒体５４の合計４本の筒体から成る伸縮式支柱を示している。つまり、本発明の伸縮式支柱は、外側筒体１とその内側の中間筒体２、並びに最も内側の内側筒体５４の３本を最少の基本構成とし、必要に応じて中間筒体２，３を複数（必要数）用いて多段に構成されるのである。
【００５７】
前記地中に埋設された外側筒体１の上端部に相当する地面上には、上記した図１、図２参考例と同様にワイヤー６を巻き上げ又は巻き下ろす駆動手段としてのウインチ５が設置されている
【００５８】
前記ウインチ５から引き出された１本のワイヤー６は、先ず上記した図１、図２の参考例と同様に、外側筒体１の上端部から該上端部に設けた吊り滑車７、第１の中間筒体２と第２の中間体３の上端又は下端に設けた吊り滑車９，６１又は支持滑車８，１０を経由させ、更に内側筒体５４の下端に設けた支持滑車６２に巻き掛ける。
【００５９】
続いて、前記内側筒体５４の下端に設けた支持滑車６２に巻き掛けたワイヤー６を前記支持滑車６２とほぼ対峙して設けた別の支持滑車６２へ巻き掛けて上向きにＵターンさせ、該ワイヤー６の先端部が前記内側筒体５４の上端部に設けられたワイヤー止着具５０に止着されている。なお、図示例の場合、前記ワイヤー止着具５０として後述する固定バンド６４の吊り滑車６１が使用されているが、これに限定されない。前記中間筒体３の上端部近傍にワイヤー６の先端が止着可能に種々の態様及び構造で実施される。例えば、図示例においてワイヤー止着具５０として使用した吊り滑車６１にワイヤー６を巻き掛けて下向きにＵターンさせ、該ワイヤー６の先端を前記吊り滑車６１の下方に設置された誘導滑車６５へ止着しても好適に実施できる。更に、前記別の支持滑車６２へワイヤー６の先端を止着しても良い。
【００６０】
また、この伸縮式支柱の支柱筒体は、前記内側筒体５４に代えて、図１２に示すような筒体内部に吊り滑車６３を備えた内側筒体４４を用いても好適に実施できる。この場合、中間筒体３の上端に設けた吊り滑車６１を経て前記内側筒体４４の前記支持滑車６２へ巻き掛けたワイヤー６は、前記内側筒体４４の内壁面に沿って立ち上がらさせ、前記吊り滑車６３へ巻き掛けて下向きに反対側へＵターンさせ、同内側筒体４４の内側面に沿って下方へ降ろし、前記支持滑車６２とほぼ対峙して設けた別の支持滑車６２へ巻き掛けて上向きにＵターンさせ、該ワイヤー６の先端部が同様にワイヤー止着具５０に止着されているのである（請求項２記載の発明）。
【００６１】
因みに、図示例の場合、前記吊り滑車６３は前記内側筒体４４内の最上部に設置されているが、この位置に限らない。該内側筒体４４内の上下いずれの位置に設けても良い。また、前記吊り滑車６３の吊り軸が水平回転できるように構成し実施することも好都合である。
上記のとおり吊り滑車６３を備えた内側筒体４４を使用することにより、内側筒体の伸縮動作はより滑らかに行うことができる。
【００６２】
図１３と図１４は、図１１中に符号IVで指示した部分の構造詳細を示している。即ち、中間筒体３の上端部に、前記吊り滑車６１及びこれに付随する誘導滑車６５を備えた環状の固定バンド６４が取り付けられている。要するに、上記した図３、図４の参考例と同様の手法により、中間筒体３の内壁面に沿って上方へ立ち上がらせたワイヤー６を前記誘導滑車６５及び吊り滑車６１並びに内側筒体５４の支持滑車６２を経由させるのである。勿論、前記内側筒体に４４においても同様に実施される。斯くして、従来技術の如く外側筒体から内側筒体へワイヤー６を通すためのスリットを筒体壁面に形成することは一切無用となり、更に滑車６１，６２，６５の直径の分だけ内外の筒体３と５４（又は４４）に直径差を設ける必要も無い訳である。
【００６３】
上記の固定バンド６４は、図１５と図１６に例示したように、内側に位置する内側筒体５４の外周面に外接する直径の短筒体６４’を直径線方向に二分したに等しい半割筒状の可動部材６４ａと固定部材６４ｂから成る。そして、前記可動部材６４ａと固定部材６４ｂは、それぞれの一端側をヒンジ機構６６により開閉自在に連結され、他端側はボルト１７とナット１８とで連結して強く又は弱く締め付けることが可能に構成されている。
【００６４】
前記固定部材６４ｂを構成する短筒体６４’の外周面の上下方向に平行に配置された２本の軸受けプレート６９、６９の間の上下の位置に、前記吊り滑車６１と誘導滑車６５がそれぞれ対で取り付けられている。
固定バンド６４には、短筒体６４’の上下にフランジ７０と７１を有し、下側フランジ７１が、中間筒体３の上端部に予め溶接等によって設けられたフランジ７２の上に重ね合わされボルト２３による接合で取り付けられている（請求項３記載の発明）。
【００６５】
なお、前記固定バンドは、図１５及び図１６に例示した形態及び構造に限定されない。例えば、上記した第１の実施形態と同様、図１７及び図１８に例示したように各筒体のガタつき防止用のスプリング付ロックボルト４５を備え、且つ内側筒体５４の外径と略同径の直径を有する短筒体７４’から成る固定バンド７４を使用して実施することもできる。
【００６６】
この固定バンド７４は、前記固定バンド６４と同様に短筒体７４’の外周面の上下方向に配置された２本の軸受けプレート７９，７９の間の上下の位置に吊り滑車６１と誘導滑車６５とを有する。更に、該固定バンド７４は、短筒体７４’の上下にやはり前記固定バンド６４と同様にフランジ８０，８１を有し、該フランジ８０，８１に設けられた孔９６を介して中間筒体３とボルト接合される（以上請求項４記載の発明）。
【００６７】
一方、内側筒体５４（又は４４）の下端部には、前記支持滑車６２のほか、外側の中間筒体３の内周面に当たって転がり走るガイドローラ２４が、図１３に示す例では円周を４等分した９０度ずつの間隔で４個設置されている。このガイドローラ２４によって中間筒体３と内側筒体５４（又は４４）との間のガタつきを解消し、且つ、内側筒体５４（又は４４）の伸縮移動を可及的に小さい転がり摩擦の状態で軽く安定して円滑に行わしめるのである。
【００６８】
前記支持滑車６２及びガイドローラ２４の取り付け手段は、上記した図１〜図４の参考例とほぼ同様の手法により行われる。
なお、図１３及び図１４における左右のガイドローラ２４は、ブラケット２８を、支持滑車６２と上下の位置に共用する構成で設置されている。そして、前記支持滑車６２の取付け位置においては、上記した取り付け用フランジ２５及びその下面側の取り付け板２６が共に、２個のブラケット２８、２８の間隔と同等な隙間９０を有する不連続円板として構成され、もって前記の隙間９０を通じてワイヤー６が上下方向に貫通する構成とされている。
【００６９】
勿論、上記参考例として例示した図４と同様、円周を３等分した１２０度ずつの間隔でガイドローラ２４を３個設置した構成でも好適に実施される。但し、この場合には図３及び図４における左側の２つのガイドローラ２４のいずれかは、ブラケット２８を、支持滑車６２と上下の位置に共用する構成で設置されている。更に、前記支持滑車６２の取付け位置において、上記した取り付け用フランジ２５及びその下面側の取り付け板２６が共に上記の参考例と同様に隙間３０を有する不連続円板として構成されている。
【００７０】
なお、図１３と図１４は、図１１のIV部を代表的に示していると説明したが、図１１に示す伸縮式支柱において、下方の外側筒体５１と中間筒体５２の関係、及び上方の第２の中間筒体５３と内側筒体５４との関係については、上記図３、図４の参考例と同様に構成される。無論、下方の外側筒体５１と中間筒体５２の関係、及び上方の第２の中間筒体５３と内側筒体５４との関係における構成に使用する固定バンドとして、上記の参考例で使用された固定バンド１４のみならず、前記固定バンド６４，７４も好適に使用できる。
【００７１】
また、上記の構成であるが故に、本発明の伸縮式支柱の現地組立は上記の参考例と同様に比較的簡単且つ容易に組立を行うことができ至便である。
本実施形態の伸縮式支柱は、やはり上記の参考例と同様にワイヤ−６と吊り滑車及び支持滑車とによる倍力機構により比較的小さい負荷で伸長動作を行うことができる。なお、該伸縮支柱の伸長動作は、基本的に上記の参考例と同様に行われる。
【００７２】
因みに、最高位まで伸長した支柱は、やはり上記の参考例と同様、固定バンド６４，７４に設けたピン孔８２，９２（図１５及び図１７を参照）及び各筒体の下部に設けたピン孔８３（図１３を参照）をストッパピン３１により串刺しにして支柱の伸縮動作が不能に固定し止めることができる。従って、上記の参考例と同様、ウインチ駆動用のモータなどは分離可能な持ち回り形式に構成してコストダウンを図ることが可能である。
【００７３】
更に、本発明の上記構成による伸縮式支柱は、次のような使用態様も可能である。
例えば図１５等に例示した固定バンド６４の前記可動部材６４ａを、上記した図３、図４の参考例における固定バンド１４の可動部材１４ａと同様、内側の第２の中間筒体３の外周面へボルト１７とナット１８とで予め強く締め付けて固定する。すると摩擦力によって両筒体２と３の間の伸縮動作が止められるから、ウインチ５を駆動して伸長動作を開始した場合、内側筒体５４（又は４４）が引き出される場合に、内側筒体５４（又は４４）が単独では上昇せず、中間筒体３と共に２本が一体となって上昇動作を行う。よって、この場合の伸縮式支柱の最高位置は２本の筒体による高さに縮小されるのであり、使い勝手に優れる。
【００７４】
上記の作用効果は、図１７等に示した前記固定バンド７４においても、同固定バンド７４のスプリング付ロックボルト４５を強く締め付けて前記両筒体５４（又は４４）と３の間に摩擦力を生じさせ且つガタつきを防止することにより、同様に奏される（請求項４記載の発明）。
【００７５】
また、上記の作用効果を応用すると、上記した伸長動作において、各筒体が上昇限界に到達した段階で次々に直下の固定バンド１４，６４におけるボルト１７とナット１８、又は固定バンド３４，７４におけるスプリング付ロックボルト４５を強固に締め付けて該固定バンド１４，３４，６４，７４を固定することにより、その伸長状態を維持、固定することも出来る。
【００７６】
以下に、請求項１に記載した発明に係る伸縮式支柱の実施例を説明する。
【００７７】
図１９と図２０は、内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱の一例を収縮又は伸長状態について各々示している。支柱筒体は、上記した第１及び第２の実施形態と同様に、最大径の外側筒体１と、その内側の中間筒体２，３、並びに最も内側で最小径の内側筒体５４の合計４本の筒体から成る伸縮式支柱を示している。つまり、本発明の伸縮式支柱は、外側筒体１とその内側の中間筒体２、並びに最も内側の内側筒体５４の３本を最少の基本構成とし、必要に応じて中間筒体２，３を複数（必要数）用いて多段に構成される。
【００７８】
前記地中に埋設された外側筒体５１の上端部に相当する地面上には、上記した第１又は第２の実施形態と同様に、ワイヤー６を巻き上げ又は巻き下ろす駆動手段としてのウインチ５が設置されている。
【００７９】
前記ウインチ５から引き出された１本のワイヤー６は、上記した図１２、図１３の 参考例と同様に、先ず、外側筒体１の上端部から該上端部に設けた吊り滑車５７と、第１の中間筒体２と第２の中間体３の上端又は下端に設けた吊り滑車５９，６１又は支持滑車５８，６０と、内側筒体５４の下端に設けた支持滑車６２に巻き掛け、更に前記支持滑車６２に巻き掛けたワイヤー６を前記支持滑車６２とほぼ対峙して設けた別の支持滑車６２へ巻き掛けて上向きにＵターンさせる。
【００８０】
続いて、上向きにＵターンさせたワイヤー６を前記第２の中間筒体３の前記吊り滑車６１とほぼ対峙して設けた吊り滑車６１へ巻き掛けて下向きにＵターンさせ、同第２の中間筒体３の内壁面に沿って下方へ降ろし、同第２の中間筒体３の前記支持滑車６０とほぼ対峙して設けた支持滑車６０に巻き掛けて上向きにＵターンさせている。更に、前記中間筒体２の前記吊り滑車５９とほぼ対峙して設け た吊り滑車５９へ巻き掛けて下向きにＵターンさせ、同中間筒体２の内壁面に沿って降ろし、同第中間筒体２の前記支持滑車５８とほぼ対峙して設けた支持滑車５８に巻き掛けて上向きにＵターンさせ、該ワイヤー６の先端部が前記外側筒体１の上端部に設けられたワイヤー止着具５０に止着されている。なお、図示例の場合、前記ワイヤー止着具５０として固定バンド６４の吊り滑車５７が使用されているが、これに限定されない。前記外側筒体１の上端部近傍にワイヤー６の先端が止着可能に種々の態様及び構造で実施される。例えば、図示例において、前記別の支持滑車５８へワイヤー６の先端を止着しても良い。
【００８１】
また、この伸縮式支柱の支柱筒体は、上記した参考例と同様に、前記内側筒体５４に代えて、図２１に示すような筒体内部に吊り滑車６３を備えた内側筒体４４を用いても好適に実施できる。この場合、やはり上記した参考例と同様に、ワイヤー６は、前記内側筒体４４の支持滑車６２から前記吊り滑車６３を経て、更に前記支持滑車６２とほぼ対峙して設けられた別の吊り滑車６２を介して前記内側筒体４４の内壁面に沿って立ち上げられる（請求項２記載の発明）。
【００８２】
なお、上記した参考例と同様、前記吊り滑車６３を設置する部位は該内側筒体４４の最上部に限定されず、上下いずれの位置に設けても良い。また、前記吊り滑車６３は、やはり第２の実施形態と同様の手法で前記内側筒体４４へ固定される。
【００８３】
上記のとおり支柱の軸線に対して略対称にワイヤー６を張り、伸縮時に各筒体２，３，５４（又は４４）に掛かるワイヤー６の張力を前記軸線に対し略対称に掛けることにより、各筒体がガタつかずにより滑らかに垂直方向へ伸縮動作させることができる。
【００８４】
図２２は、図１１中に符号Ｖで指示した部分の構造詳細を示している。即ち、中間筒体２の上端部に、上記固定バンド６４又は固定バンド７４が取り付けられ、上記した参考例と同様の手法で、ワイヤー６が中間筒体２から前記誘導滑車６５及び吊り滑車５９並びに第２の中間体３の支持滑車６０を経由して前記第２の中間体３へと張られている。従って、従来技術の如く外側筒体から内側筒体へワイヤー６を通すためのスリットを筒体壁面に形成したり、滑車５９、６０、６５の直径の分だけ内外の筒体２と３に直径差を設ける必要は無い。
【００８５】
前記第２の中間筒体３の下端部には、上記した参考例と同様の構成により、外側の第１の中間筒体２の内周面に当たって転がり走るガイドローラ２４が設置されている。従って、中間筒体３の伸縮動作を軽く安定して円滑に行える。
また、支持滑車６２及びガイドローラ２４の取り付け手段は、上記した参考例とほぼ同様の手法により行われる。
【００８６】
図２２は、図１１のＶ部を代表的に示していると説明したが、図１１に示す伸縮式支柱において、下方の外側筒体１と中間筒体２の関係、及び上方の第２の中間筒体３と内側筒体５４（又は４４）との関係についても、同様に構成されていることを理解されたい。
また、上記の構成であるが故に、本発明の伸縮式支柱の現地組立は上記した参考例と同様に比較的簡単且つ容易に組立を行うことができ至便である。
【００８７】
本実施形態の伸縮式支柱は、垂直方向へ伸長する中間筒体２，３及び内側筒体５４（又は４４）に対してワイヤー６と吊り滑車及び支持滑車とによる倍力機構を各々２つずつ有している。従って、上記した参考例よりも更に数分の一小さい負荷で支柱の伸長動作をウインチ５により行わせることができる。なお、本実施形態における伸縮支柱の伸長動作は、基本的に上記した図１、図２の参考例と同様に行われる。
【００８８】
因みに、最高位まで伸長した支柱は、やはり上記した参考例等と同様、固定バンド６４，７４に設けたピン孔８２，９２（図１５及び図１７を参照）及び各筒体の下部に設けたピン孔８４（図２２を参照）をストッパピン３１により串刺しにして支柱の伸縮動作が不能に固定し止めることができる。従って、上記した参考例等と同様、ウインチ駆動用のモータなどは分離可能な持ち回り形式に構成してコストダウンを図ることが可能である。
【００８９】
更に、本発明の上記構成による伸縮式支柱は、次のような使用態様も可能である。
例えば前記固定バンド６４の前記可動部材６４ａを、上記した参考例における固定バンド１４の可動部材１４ａと同様、内側の第２の中間筒体３の外周面へボルト１７とナット１８とで予め強く締め付けて固定する。すると摩擦力によって両筒体２と３の間の伸縮動作が止められるから、ウインチ５を駆動して伸長動作を開始した場合、内側筒体５４（又は４４）が引き出される場合に、内側筒体５４（又は４４）が単独では上昇せず、中間筒体３と共に２本が一体となって上昇動作を行う。よって、この場合の伸縮式支柱の最高位置は２本の筒体による高さに縮小されるのであり、使い勝手に優れる。
【００９０】
上記の作用効果は、前記固定バンド７４においても、同固定バンド７４のスプリング付ロックボルト４５を強く締め付けて前記両筒体５４（又は４４）と３の間に摩擦力を生じさせ且つガタつきを防止することにより、同様に奏される。
【００９１】
また、上記の作用効果を応用すると、上記した伸長動作において、各筒体が上昇限界に到達した段階で次々に直下の固定バンド６４におけるボルト１７とナット１８、又は固定バンド７４におけるスプリング付ロックボルト４５を強固に締め付けて該固定バンド６４，７４を固定することにより、その伸長状態を維持、固定することも出来るのである。
【００９２】
上記した参考例及び実施形態は、各筒体１〜４，４４，５４の横断面形状が円形であるが、この限りではない。四角形或いは六角形等の多角形の筒体で実施することも可能である。その場合には、上述した「直径線方向」の用語は、管の中心を通る直線と読み替えて理解されたい。
【００９３】
また、各筒体１〜４，４４，５４は、無数の小孔を規則的配置に設けたパンチングメタルで製作した筒体、或いは円周に沿って配置された複数の鉛直荷重支持用の縦鋼棒と、その外周に巻いて拘束し曲げ荷重を負担する巻き鋼線とで篭状に構成された網構造の筒体を用いても好適に実施される。各筒体１〜４，４４，５４を前記構造とすることによって大幅な軽量化を図ることができ、運搬や設置工事における施工性を著しく向上させることができる。通例、支柱には風荷重が作用するので、風荷重を考慮した設計が必須で有り、その分支柱の全幅が大型化し、大重量化する問題がある。しかし、支柱の各筒体１〜４，４４，５４を前記網構造とすることにより、風荷重を大幅に減少させることができ、その結果、伸縮式支柱における最大全高のより大型化を図ることもできるのである。
【００９４】
以上には本発明の好適な実施形態を説明したが、本発明の実施形態以外にも、本発明の要旨を逸脱することなく、当業者が通常行う種々の応用、変更による実施も可能であることを付言する。例えば、図１１に示した伸縮式支柱において、第２の中間筒体の下端に前記支持滑車１０とほぼ対峙して別の支持滑車を設けると共に、第１の中間筒体２の上端に固定バンド６４を設置する。そして、ワイヤー６の先端部を吊り滑車６１へ止着せずに単に巻き掛けて下向きにＵターンさせ、前記誘導滑車６５に巻き掛けて該第２の中間筒体３の内壁面に沿って下方へ降ろし、更に同中間筒体３の前記別の支持滑車へ巻き掛けて上向きにＵターンさせ、前記第１の中間筒体２の上端に設置した固定バンド６４の吊り滑車へ止着しても本発明は好適に実施できる。更に、前記第１の中間筒体２の上端に設置した固定バンド６４の吊り滑車へ止着せずに単に巻き掛けて下向きにＵターンさせ、前記前記第１の中間筒体２の上端に設置した固定バンド６４の誘導滑車に止着して も本発明は好適に実施できる。
【００９５】
【発明の効果】
請求項１〜６に記載した発明に係る伸縮式支柱は、上記した従来技術の欠点、問題点をことごとく解決した構成になっている。
即ち、複数の滑車の存在が内外の支柱筒体の間に格別の直径差を要求されることは決してなく、内外に嵌め合わせる筒体の直径差を可及的に小さくしてスマートで極めて軽量な構成にできる。
【００９６】
勿論、内外の支柱筒体間に滑車及びワイヤーを通すスリットを筒体壁面に形成する必要がなく、スリット加工の手間を省いて安価に製作できるほか、ワイヤーが支柱の外面に露出するのは吊り滑車へ巻き掛けるほんの一部分であるから外観意匠に優れた伸縮式支柱を提供出来る。
【００９７】
しかも、支柱を最大限度まで伸張した状態をストッパピンで固定してウインチの負荷を除外したり、移動する複数の支柱筒体の中から任意に選択した１本或いは複数本を固定バンドで一体化して伸縮動作をさせることも可能であるから、使い勝手が良く、伸縮の段数やストロークの大きさの設定の自由度が大きい。その上、比較的に安価であり、メンテナンスも容易で施工性の優れた伸縮式支柱を提供できるのである。
【００９８】
更に、本発明の伸縮式支柱によれば、支柱の軸線に対して略対称にワイヤーが張られ、該ワイヤーの張力が前記軸線に対して略対称に掛けることができるので、各筒体がガタつかずにより安定し滑らかに垂直方向へ伸縮動作させることができる。
【図面の簡単な説明】
【図１】 本発明の理解に供する参考例に係る伸縮式支柱を最低位置まで収縮させた状態を概念的に示した断面図である。
【図２】 前記伸縮式支柱を最高位置まで伸長させた状態を概念的に示した断面図である。
【図３】 図２中に符号IIIで指示した部分の構造詳細を示す断面図である。
【図４】 図３のVI−VI線矢視の断面図である。
【図５】 固定バンドの斜視図である。
【図６】 固定バンドとストッパピンの組み合わせを示した水平断面図である。
【図７】 図２のVII矢視部分の斜視図である。
【図８】 異なる固定バンドの斜視図である。
【図９】 異なる固定バンドとストッパピンの組み合わせを示した水平断面図である。
【図１０】 本発明の理解に供する参考例に係る伸縮式支柱を最低位置まで収縮させた状態を概念的に示した断面図である。
【図１１】 前記伸縮式支柱を最高位置まで伸長させた状態を概念的に示した断面図である。
【図１２】 吊り滑車を内部に有する内側筒体の使用状態を説明する断面図である。
【図１３】 図１１中に符号IVで指示した部分の構造詳細を示す断面図である。
【図１４】 図１３の-VIII−VIII線矢視の断面図である。
【図１５】 固定バンドの斜視図である。
【図１６】 固定バンドとストッパピンの組み合わせを示した水平断面図である。
【図１７】 異なる固定バンドの斜視図である。
【図１８】 異なる固定バンドとストッパピンの組み合わせを示した水平断面図である。
【図１９】 本発明の実施形態に係る伸縮式支柱を最低位置まで収縮させた状態を概念的に示した断面図である。
【図２０】 前記伸縮式支柱を最高位置まで伸長させた状態を概念的に示した断面図である。
【図２１】 吊り滑車を内部に有する内側筒体の使用状態を説明する断面図である。
【図２２】 図２０中に符号Ｖで指示した部分の構造詳細を示す断面図である。
【符号の説明】
１ 外側筒体
２、３ 中間筒体
４、４４、５４ 内側筒体
６ ワイヤー
７、９、１１、５７、５９、６１、６３ 吊り滑車
８、１０、１２、５８，６０，６２ 支持滑車
５ ウインチ
２４ ガイドローラ
１５、６５ 誘導滑車
１４、３４、６４、７４ 固定バンド
１４’、３４’、６４’、７４’ 筒体
１４ａ、６４ａ 可動部材
１４ｂ、６４ｂ 固定部材
１６、６６ ヒンジ機構
１７ ボルト
１８ ナット
１９、３９、６９、７９ 軸受けプレート
２０、４０、７０、８０ 上側フランジ
２１、４１、７１、８１ 下側フランジ
２２、７２ フランジ
２３ ボルト
３１ ストッパピン[0001]
BACKGROUND OF THE INVENTION
This invention is tall for large-scale facilities such as a frost-proof fan support in a tea garden, a lighting support for roads and airfields, a wind-proof road, a snow fence support, or a ball-proof fence support for a ball field. It is a large-sized support, which is composed of a plurality of support cylinders that are fitted inside and outside to be freely stretched, and has a large extension / contraction stroke, and belongs to the technical field of a telescopic support that can be extended and contracted by a wire and pulley system.
[0002]
[Prior art]
Conventionally, the following prior arts are well-known as to a strut that is a large-scale facility and is configured as a tall large strut by a wire and pulley system.
[0003]
(1) The telescopic column described in FIG. 11 of Japanese Patent No. 2634776 (issue date: July 30, 1997) is provided with a pulley inside the upper end of the base tube column and installed outside the same tube column. The other end of the wire pulled out from the winch and wound around the pulley is fixed to the lower end portion of the middle tube column fitted inside the base tube column, and a pulley is also provided inside the upper end of the middle tube column. After fixing the wire to the base tube column and winding the wire that rose outside the middle tube column around the pulley at the upper end of the intermediate tube column, it was fixed to the lower end of the inner tube column fitted inside the middle tube column Thus, by winding or unwinding the wire with a winch, the middle tube column and the inner tube column are moved in and out of the base tube column all at once. However, in this telescopic column, the outer diameter of the inner tube column fitted inside the base tube column and the outer diameter of the inner tube column fitted inside the intermediate tube column must be reduced by the diameter of the pulley. However, it is difficult to have a multi-stage pipe configuration. Moreover, the gap between the pipes is easily rattled by the large gap as described above, and there is a defect of poor stability.(See Patent Document 1).
[0004]
(2) The telescopic support column described in FIGS. 2 and 3 of the publication for the purpose of solving the above-mentioned drawbacks has a configuration in which a telescopic mechanism using a wire and a pulley system is expanded and contracted by a double stroke by a gas damper. is there. That is, a gas damper is arranged vertically upward at the center of the base tube column, and a wire with one end fixed to the tube column is wound around the pulley provided at the upper end, and the other end of the wire is the outer periphery of the gas damper. Fixed to the lower end of the auxiliary pipe column. A pulley is also provided in the upper part of the auxiliary pipe column, and a wire that is fastened to the base pipe column with one end fastened inside the auxiliary pipe column is wound around the pulley at the upper end of the auxiliary pipe column, and the other end is a third pipe. The structure is fixed to the lower end of the pillar. Therefore, when the gas damper is expanded and contracted, the auxiliary tube column and the third tube column are moved in and out simultaneously with respect to the base tube column. Therefore, the problem of reducing the diameter of the auxiliary tube column and the third tube column relative to the base tube column by the diameter of the pulley has been solved.(See Patent Document 1).
[0005]
(3) Next, the telescopic strut described in Japanese Patent Publication No. 6-63383 has a wire drawn from a winch installed on the lower outer peripheral surface of the outermost base tube column on the upper outer peripheral surface of the base tube column. Wrap it around the provided suspension pulley, then wrap it around the support pulley provided on the lower inner peripheral surface of the middle tube column fitted inside the base tube column, and make an U-turn upward, inside the upper tube column Wrap around a suspension pulley provided on the circumference. In the same manner, the above-mentioned wire is repeatedly wound around a support pulley provided on the lower inner peripheral surface of the second intermediate tube pillar fitted inside the same intermediate tube column, and is U-turned upward to repeat the inner tube column. To the bottom inner peripheral surface. In the case of this telescopic column, in order to pass the wire that wraps from the suspension pulley provided on the upper outer peripheral surface of the base tube column to the support pulley provided on the lower inner peripheral surface of the intermediate tube column, A slit having a length corresponding to the expansion / contraction stroke must be provided in the vertical direction. Similarly, a slit through which a wire that wraps from the suspension pulley of the middle tube column to the support pulley of the second intermediate tube column on the inside is further passed through the wire that is introduced from the suspension pulley of the second intermediate tube column to the inner tube column. Is necessary for each. In addition, as a means for eliminating the difference in diameter between the inner and outer tube columns due to the diameter of the pulley, the slit is formed with a width that allows the inward pulley to pass through.(See Patent Document 2). The telescopic support described in Utility Model Registration No. 3021789 also has the same configuration.(See Patent Document 3).
[0006]
(4) The telescopic support described in Japanese Utility Model Laid-Open No. 5-6047 has a suspension pulley attached to the upper end of each pipe column and a support pulley attached to the lower end, as a device that makes the slit of (3) unnecessary. It is installed with an inclination so that the wire can be placed in the gap between the inner and outer tube columns across the thickness of the tube wall(See Patent Document 4).
[0007]
(5) The telescopic column described in Japanese Patent Laid-Open No. 11-62884 is a combination of an outer fixed tube and a moving tube fitted inside thereof, and a telescopic drive unit ( A motor or winch, etc.) is installed, and a feed screw shaft mechanism, rack / pinion mechanism, or one end fixed to the upper part of the fixed tube is installed in the tube of the moving tube to generate relative movement with the fixed tube. It is configured to extend and contract a pulley-type mechanism using a chain and sprocket driven by the drive unit.(See Patent Document 5).
[0008]

[Patent Document 1]
Japanese Patent No. 2634776 (Page 2, Fig. 11)

[Patent Document 2]
Japanese Examined Patent Publication No. 6-63383 (page 3-4, Figs. 2 and 3)

[Patent Document 3]
Utility Model Registration No. 3021789 (Page 2, Fig. 2)

[Patent Document 4]
Japanese Utility Model Publication No. 5-6047 (Page 4-5, Figs. 2 and 4)

[Patent Document 5]
Japanese Patent Laid-Open No. 11-62884 (page 2-5, FIG. 2)
[0009]
[Problems to be solved by the invention]
(I) Needless to say, the above-mentioned drawbacks of the telescopic strut of (1), but even in the case of the telescopic strut of the above (2) that solved the disadvantage, On the other hand, since the auxiliary tube column and the third tube column are moved in and out at the same time, it is impossible to extend or retract only one of the auxiliary tube column or the third tube column. It is a configuration. In addition, although the auxiliary pipe column and the third pipe column are configured to perform a double-stroke expansion / contraction operation, the basic expansion / contraction stroke is governed solely by the size of the gas damper stroke. The 16th to 17th lines of paragraph number [0010] in the left column of page 3 of the same publication are desired to expand and contract by about 3 to 6 m, as the maximum stroke of the gas damper as a circulation product is introduced to be about 350 mm. As a telescopic column of a large support, it is extremely impractical.
[0010]
(Ii) The telescopic support of (3) has a configuration with a wire using a winch and a pulley system, so the problem of the stroke is small. However, in order to pass a wire from the outer tube column to the inner tube column, or even an inward pulley, a slit must be formed long in the vertical direction of the tube wall of each moving tube column. Therefore, it takes a lot of labor and cost to process the slit formation, and the presence of the slit deteriorates the appearance design as a support. Further, the strength and rigidity are reduced by the amount of the cross-sectional defect in which the slit is formed in the tube column, and the load bearing performance is poor. Alternatively, in order to supplement the load bearing performance described above, it is necessary to form a support column that is larger than necessary, and there is an inconvenience in terms of cost and handling.
[0011]
(Iii) The telescopic strut described in (4) above can be evaluated for its configuration in which the slits in the tube wall are not used, but it is wound between the suspension pulley and the support pulley provided to be inclined above and below each tube pillar. The wire to be hung needs to make one turn in the same pipe per one column. In order to smoothly move the long wire in this way, the tube columns fitted inside and outside are slid and moved to the opposite side of the wire position (see FIGS. 2 and 4 of the publication). However, the sliding resistance at the time of expansion / contraction operation is large, the burden on the driving means is large, and a high-grade motor is necessary and expensive. On the other hand, since a considerably large gap is formed between the inner and outer tube pillars on the wire side, it tends to cause backlash. In addition, the work, processing and installation work for attaching the suspension pulley and the support pulley provided by inclining up and down each tube pillar are troublesome, and as a result, the assembly work as an expansion / contraction support is troublesome and maintenance is also troublesome. Have some disadvantages.
[0012]
(Iv) The telescopic strut of (5) seems to have a rational structure at first glance, and the configuration in which a guide roller is installed at the lower end of the moving tube can be evaluated. However, in the case of a feed screw shaft mechanism or a rack and pinion mechanism, for example, a feed screw shaft or rack having an effective length equal to the expansion / contraction stroke of the moving tube is required, which is very expensive. In addition, since the telescopic strut is limited to a one-stage telescopic mechanism, including a mechanism using a chain and a sprocket, there is a limit to realizing a large telescopic stroke by a multi-stage telescopic mechanism. .
[0013]
(V)The telescopic struts of the above (1) to (5) have a problem that when the maximum overall height of the strut is increased, the wind load increases accordingly, and the cylindrical body constituting the strut becomes large and heavy.
[0014]
( vi )An object of the present invention is to provide a wire and pulley-type telescopic support column that has solved all the above-mentioned drawbacks and problems of the prior art. More specifically, the presence of the pulley does not require a particular difference in diameter between the inner and outer column cylinders, and a slit for passing the pulley and the wire between the inner and outer cylinders needs to be formed on the wall surface of the cylinder. The wire is exposed to the outer surface of the support column only for a small portion of the suspension pulley, and the appearance design is excellent, and the support is fixed to the maximum stretched state with a stopper pin to eliminate the load on the winch. It is also possible to select one or more of the moving column cylinders to be integrated and to perform an expansion / contraction operation, and the degree of freedom for setting the number of expansion / contraction steps and stroke size is also possible. Large and relatively inexpensive,Lightweight andAn object of the present invention is to provide a telescopic column having a structure that is easy to maintain.
[0015]
(V ii The next object of the present invention is to provide a telescopic support column that can be expanded and contracted more smoothly in the vertical direction.
[0019]
  As means for solving the above problems,Claim1The telescopic strut according to the invention described in
  In the telescopic strut that consists of a plurality of strut cylinders that are telescopically fitted inside and outside, and that allows each strut cylinder to enter and exit by wire and pulley system,
  The column cylinder consists of at least three of one outer cylinder, one or more intermediate cylinders, and one inner cylinder, and the wire passes through a suspension pulley provided at the upper end of the outer cylinder. , Wrap around a support pulley provided at the lower end of the intermediate cylinder and make an upward U-turn, rise upward along the inner wall surface of the intermediate cylinder, and wrap around a suspension pulley provided at the upper end of the intermediate cylinder U-turns downward and wraps around a support pulley provided at the lower end of the inner cylinder, and further wraps around a support pulley provided at the lower end on the opposite side of the inner cylinder and turns upward, Wrap it around a suspension pulley provided at the upper end and make a U-turn downward, lower it down along the inner wall surface of the intermediate cylinder, wrap it around a support pulley provided at the lower end of the intermediate cylinder and make an U-turn upward The tip of the wire is fastened near the upper end of the outer cylinder. To have it,
  A driving means for winding or unwinding a wire extending outwardly via the suspension pulley provided at the upper end of the outer cylindrical body;
  A plurality of guide rollers that roll and run against the outer circumferential surface of the outer cylindrical body at least at the lower end of the intermediate cylindrical body and the inner cylindrical body;
Are each characterized.
[0020]
  Claim2The described invention is claimed.1In the telescopic support described,
  The inner cylinder has a suspension pulley inside the cylinder,
  The wire wound around the support pulley provided at the lower end of the inner cylinder through the suspension pulley provided at the upper end of the intermediate cylinder rises along the inner wall surface of the inner cylinder, and is wound around the suspension pulley of the inner cylinder. It is hung and made a U-turn downward to the opposite side, lowered downward along the inner side surface of the inner cylinder, and wound around a support pulley provided at the lower end of the inner cylinder.
[0022]
  Claim3The invention described in claim 1Or 2In the telescopic support according to the invention described in
  An annular fixed band having a suspension pulley and a guide pulley is attached to at least the upper ends of the outer cylinder and the intermediate cylinder,
  The fixed band is composed of a halved cylindrical movable member and a fixed member that are equal to a cylinder with a diameter circumscribing the outer peripheral surface of the inner cylindrical member, and the movable member and the fixed member are each opened and closed by a hinge mechanism. It can be connected freely and the other end can be connected with bolts and nuts and tightened.
  A suspension pulley and a guide pulley are attached to the upper and lower positions between two bearing plates arranged in the vertical direction of the outer peripheral surface of the fixing member;
  The fixing band has its lower flange overlapped with the flange provided at the upper end of the outer cylinder or the intermediate cylinder, and is attached by bolt joining.
Are each characterized.
[0023]
  Claim4The invention described in claim 1Or 2In the telescopic support according to the invention described in
  An annular fixed band having a suspension pulley and a guide pulley is attached to at least the upper ends of the outer cylinder and the intermediate cylinder,
  The fixing band is composed of a cylinder having a diameter substantially the same as the outer diameter of the inner cylinder, and can be tightened by a lock bolt with a spring.
  A suspension pulley and a guide pulley are attached to the upper and lower positions between two bearing plates arranged in the vertical direction of the outer peripheral surface of the fixing member;
  The fixing band has its lower flange overlapped with the flange provided at the upper end of the outer cylinder or the intermediate cylinder, and is attached by bolt joining.
Are each characterized.
[0027]
  Claim5The described invention is claimed.1In the telescopic support described,
  One guide roller at the lower end of the intermediate cylinder or the inner cylinder is installed at a vertical position by a support common to the support pulley provided at the lower end.
[0028]
  Claim6The described invention is claimed.1In the telescopic support described,
  The two guide rollers at the lower end of the intermediate cylinder or the inner cylinder are installed at upper and lower positions by a support common to the support pulley provided at the lower end.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
  In the following, with reference to the drawings,6Embodiment of the telescopic support | pillar which concerns on invention described in 1 is demonstrated.
[0031]
  As a basic idea of the present invention, the telescopic support column is a telescopic support column that is composed of a plurality of support column bodies that are telescopically fitted inside and outside, and allows each column cylinder to enter and exit by a wire and pulley system. The support cylinder includes at least three of an outer cylinder, one or a plurality of intermediate cylinders, and an inner cylinder. The wire passes through a suspension pulley provided at the upper end of the outer cylindrical body, wraps around a support pulley provided at the lower end of the intermediate cylindrical body, makes an upward U-turn, and moves upward along the inner wall surface of the intermediate cylindrical body , Wrap around a suspension pulley provided at the upper end of the intermediate cylinder and make a U-turn downward.The tip of the wire that is lowered downward along the inner wall surface of the intermediate cylinder and wound around a support pulley provided at the lower end of the intermediate cylinder and made an U-turn upward is near the upper end of the outer cylinder.It is fastened.
[0032]
  In this telescopic column,A wire that extends outward through the suspension pulley provided at the upper end of the outer cylinder.A driving means for winding or unwinding is provided. A plurality of guide rollers that roll and run against the outer peripheral surface of the outer cylinder are provided at least at the lower ends of the intermediate cylinder and the inner cylinder (the invention according to claim 1).
  Less than,Together with reference examples to facilitate understanding of the present invention,Embodiments will be described sequentially.
[0034]
  FIG. 1 and FIG.A reference example for understanding the present invention,An example of the telescopic column which consists of a plurality of column cylinders fitted inside and outside in a stretchable manner and allows the column cylinders to enter and exit by a wire and pulley system is shown. Specifically, the columnar cylinder includes the outermost cylinder 1 with the largest diameter embedded in the ground, the intermediate cylinder 2 inside thereof, the second intermediate cylinder 3 inside, and the innermost innermost cylinder. The telescopic support | pillar which consists of a total of four cylinders of the inner cylinder 4 of a small diameter is shown. FIG. 1 shows a state in which the telescopic support column is contracted to the lowest position, and FIG. 2 conceptually shows a state in which the telescopic support column is extended to the highest position. That is, the telescopic support column of the present invention has a minimum basic configuration of the outer cylindrical body 1, the intermediate cylindrical body 2 inside thereof, and the innermost inner cylindrical body 4, and if necessary, the intermediate cylindrical body 2, It is configured in multiple stages using multiple (required number) 3The
[0035]
On the ground corresponding to the upper end portion of the outer cylindrical body 1 embedded in the ground, a wire6A winch 5 is installed as a driving means for rolling up or down the outer cylinder 1 outside the suspension pulley.
[0036]
One wire 6 drawn out from the winch 5 passes through a suspension pulley 7 provided at the upper end portion of the outer cylindrical body 1 and is wound around a support pulley 8 provided at the lower end of the intermediate cylindrical body 2 so as to move upward U The intermediate cylinder 2 is turned up, rises upward along the inner wall surface of the intermediate cylinder 2, is wound around a suspension pulley 9 provided at the upper end of the intermediate cylinder 2, and is U-turned downward. The second intermediate cylinder 3 is wound around a support pulley 10 provided at the lower end of the second intermediate cylinder 3 to make an upward U-turn, and rises upward along the inner wall surface of the second intermediate cylinder 3. The intermediate cylinder 3 is wound around a suspension pulley 11 provided at the upper end of the intermediate cylinder 3 so as to make a U-turn downward. Furthermore, the tip of the wire 6 that is wound around the support pulley 12 provided at the lower end of the inner cylinder 4 and made an upward U-turn so as to rise along the inner wall surface of the inner cylinder 4 is the inner cylinder 4.Wire fastenersIt is fixed to 13.In addition, in the example of illustration, although the said wire fastener 13 is installed in the uppermost part in the said inner side cylinder 4, it does not restrict to this position. As long as the wire 6 can be fastened, it may be provided at any position above and below the inner cylinder 4.
[0037]
  3 and 4 show details of the structure indicated by the reference numeral III in FIG. That is, an annular fixed band 14 provided with the suspension pulley 9 and a guide pulley 15 associated therewith is attached to the upper end portion of the intermediate cylinder 2. In short, the wire 6 raised upward along the inner wall surface of the intermediate cylinder 2 is once led out of the upper end of the intermediate cylinder 2 by way of the guide pulley 15. Then, the suspension pulley 9 provided at the position directly above is wound from the outside to the inside and U-turned downward to the inside of the intermediate cylinder 2 so that the support provided at the lower end of the second intermediate cylinder 3 is provided. A wire 6 is wound around the pulley 10 from the outside to the inside so that the U-turn can be turned upward, and it is possible to rise upward along the inner wall surface of the second intermediate cylinder 3.TheTherefore, it is absolutely unnecessary to form a slit on the cylindrical wall surface for passing the wire 6 from the outer cylindrical body to the inner cylindrical body as in the prior art. Further, it is not necessary to provide a difference in diameter between the inner and outer cylinders 2 and 3 by the diameter of the pulleys 9, 10, and 15.
[0038]
The fixed band 14 is illustrated in FIGS. 5 and 6, and as shown in FIG. 7, the short cylindrical body 14 having a diameter that circumscribes the outer peripheral surface of the second intermediate cylindrical body 3 positioned inside. It consists of a half-cylindrical movable member 14a and a fixed member 14b, which are equal to bis-divided in the diameter line direction. The movable member 14a and the fixed member 14b are configured such that one end side of each of the movable member 14a and the fixed member 14b is openably and closably connected by a hinge mechanism 16 and the other end side is connected by a bolt 17 and a nut 18 to be tightened strongly or weakly. Has been.
[0039]
The suspension pulley 9 and the guide pulley 15 are attached to the upper and lower positions between the two bearing plates 19, 19 arranged parallel to the vertical direction of the outer peripheral surface of the short cylindrical body 14 ′ constituting the fixing member 14 b. It has been.
[0040]
  The fixed band 14 has flanges 20 and 21 above and below the short cylinder 14 ′, and the lower flange 21 is superimposed on a flange 22 that is provided in advance on the upper end of the intermediate cylinder 2 by welding or the like. It is attached by joining with bolts 23(ContractClaim3Described invention).
[0041]
In addition, the said fixed band is not limited to the form and structure illustrated to FIGS. For example, as illustrated in FIG. 8 and FIG. 9, a short cylinder having a lock bolt 45 with a spring for preventing rattling of each cylinder and having a diameter substantially the same as the outer diameter of the inner intermediate cylinder 3. It can also be implemented using a fixed band 34 consisting of a body 34 '.
[0042]
Similar to the fixed band 14 illustrated in FIG. 5, the fixed band 34 is suspended at an upper and lower position between two bearing plates 39, 39 arranged in the vertical direction on the outer peripheral surface of the short cylindrical body 34 ′. It has a pulley 9 and a guide pulley 15. Further, the fixing band 34 has flanges 40 and 41 similarly to the fixing band 14 illustrated in FIG. 5 above and below the short cylinder 34 ′, and through holes 46 provided in the flanges 40 and 41. And bolted to the intermediate cylinder 2(ContractClaim4Described invention).
[0043]
  On the other hand, at the lower end of the second intermediate cylinder 3, in addition to the support pulley 10, a guide roller 24 that rolls against the inner peripheral surface of the outer intermediate cylinder 2 runs around the circumference in the example shown in FIG. Three are installed at equally spaced 120 degree intervals.TheThe guide roller 24 eliminates rattling between the intermediate cylinder 2 and the second intermediate cylinder 3, and allows the second intermediate cylinder 3 to expand and contract in a state of rolling friction as small as possible. It is light, stable and smooth.
[0044]
As a means for attaching the support pulley 10 and the guide roller 24, in the case of FIG. 3, a mounting flange 25 having a slightly smaller diameter than the inner diameter of the intermediate cylinder 2 is welded to the outer peripheral surface of the lower end of the second intermediate cylinder 3 in advance. It is fixed by means such as. A donut-shaped mounting plate 26 having the same diameter as the outer diameter of the mounting flange 25 is applied to the lower surface of the mounting flange 25, and is fastened and fixed with a downward bolt 27. On the lower surface of the mounting plate 26, the guide roller 24 is installed with two brackets 28, 28 having an L shape fixed by bolts 29.
[0045]
  Only the guide roller 24 on the right side in FIGS. 3 and 4 is installed in a configuration in which the bracket 28 is shared with the support pulley 10 at the upper and lower positions.TheAt the mounting position of the support pulley 10, both the mounting flange 25 and the mounting plate 26 on the lower surface side thereof are discontinuous disks having a gap 30 equivalent to the interval between the two brackets 28, 28. Thus, the wire 6 penetrates in the vertical direction through the gap 30.
[0046]
3 and 4 have been described as representatively showing part III of FIG. 2, but in the telescopic support shown in FIG. 2, the relationship between the lower outer cylindrical body 1 and the intermediate cylindrical body 2 and the upper It should be understood that the relationship between the second intermediate cylinder 3 and the inner cylinder 4 is similarly configured. However, it is not necessary to attach a fixing band to the upper end of the inner cylinder 4.
[0047]
Because of the above configuration, when the telescopic support column according to the present invention is assembled in the field, the guide roller 24 and the support pulley 10 are attached to the lower end of the second intermediate cylinder 3 together with the mounting plate 26 in the example of FIG. The second intermediate cylinder 3 is fitted inside the intermediate cylinder 2. Thereafter, the fixing band 14 is connected to the upper end of the intermediate cylinder 2., 34By carrying out the order of attaching the components, it is convenient to assemble relatively easily. Of course, the wire 6 is wound around the support pulley 10 in advance.In addition, illustrated in FIG.Since the fixed band 14 connects the movable member 14a and the fixed member 14b so as to be openable and closable by the hinge mechanism 16 as described above, the both members are greatly opened in a split state and hung on the second intermediate cylinder 3. The fixing band 14 can be easily attached by the method of applying it.
[0048]
Since the telescopic support column according to the present invention is configured with a kind of booster mechanism by one wire 6, the suspension pulley 9, and the support pulley 10, from the state of being contracted to the lowest position as shown in FIG. When the wire 6 is wound up by the winch 5, the extension operation can be performed with a relatively small load. Since the extension operation of the support column is first of the smallest diameter, the lightest inner cylindrical body 4 is pulled out and raised. Then, as shown in FIG. 3, the fixing band 14 in which the head of the bolt 27 on the mounting flange 25 is located directly above., 34Lower flange 21 in, 41Then, at the stage where the upper limit is reached, the lightweight second intermediate cylinder 3 starts to rise. When the second intermediate cylinder 3 reaches the rising limit in the same manner as described above, the extension operation is performed in the order in which the heaviest intermediate cylinder 2 finally starts to rise. Thus, when the intermediate cylinder 2 reaches the ascent limit, the column is extended to the highest position. In the embodiment of FIG. 2, the length of one cylinder is about 1.6 m, and the total of the three cylinders is extended to a height of about 4.5 m above the ground.
[0049]
As described above, the strut extended to the highest position is normally maintained by stopping the winch 5 and maintaining the tension state of the wire 6. However, in this method, one winch 5 is required for each column, and the cost including the winch driving motor presses the selling price of the column.
[0050]
  As a countermeasure, the present invention makes the following efforts. That is, the lower end of the intermediate cylinder 2 pulled up from the outer cylinder 1, the second intermediate cylinder 3 pulled up from the intermediate cylinder 2, or the inner cylinder 4 pulled up from the second intermediate cylinder 3 As shown in FIG. 6 or FIG. 7, the fixed bands 14 and 34 provided at the upper end of the outer cylinder 1 or the fixed bands 14 and 34 provided at the upper end of the intermediate cylinder 2 are skewed in the diameter line direction. The stopper pin 31 is fixed to stop the expansion and contraction operation.TheFor this purpose, pin holes 32 and 42 are prepared in advance in the short cylinders 14 'and 34' of the fixing bands 14 and 34 (see FIGS. 5 and 8), and the pin holes are also provided at the bottom of each cylinder. Pin holes 33 (see FIG. 3) are prepared in an arrangement that coincides with 32 and 42. As described above, when the stopper pin 31 is inserted into the skewered state, there is no need to hold the wire 6 in a tensioned state with the winch 5, so that at least the winch driving motor and the like are configured in a separable carrying type to reduce the cost. It is possible to plan.
[0051]
The telescopic support column according to the above configuration of the present invention can be used as follows.
For example, as shown in FIG.As described above, the fixed band 14 has a half-cylindrical shape that is equivalent to a bisect of the short cylindrical body 14 ′ having a diameter circumscribing the outer peripheral surface of the second intermediate cylindrical body 3 positioned inside in FIG. 3. The movable member 14a and the fixed member 14b are connected to each other by a hinge mechanism 16 so that the movable member 14a and the fixed member 14b can be opened and closed, and the other end is connected by a bolt 17 and a nut 18 to be strong or weak. It can be tightened.
[0052]
  Therefore, in the case of FIG. 3, as a method of installing the fixed band 14, only the lower flange 21 of the fixed member 14b is bolted to the flange 22 of the intermediate cylinder 2, and the lower flange 21 of the movable member 14a is not bolted. It is in a free state. Therefore, in the contracted state of FIG. 1, the movable member 14 a is firmly fixed to the outer peripheral surface of the inner second intermediate cylinder 3 with bolts 17 and nuts 18 in advance. Then, the expansion and contraction movement between both cylinders 2 and 3 is stopped by the friction force.RukaThen, when the winch 5 is driven and the extension operation is started, when the second intermediate cylinder 3 is pulled out, the second intermediate cylinder 3 does not rise alone, and the two together with the intermediate cylinder 2 are Ascend as a unit. Therefore, the maximum position of the telescopic support in this case is reduced to the height by the two cylinders, and the usability is excellent.
[0053]
  The above-described effect is also achieved in the fixing band 34 shown in FIG. 8 by strongly tightening the spring-loaded lock bolt 45 of the fixing band 34 to generate a frictional force between the cylinders 2 and 3 and rattling. Played similarly by preventing(ContractClaim4Described invention).
[0054]
In addition, when the above-described effects are applied, in the above-described extension operation, the fixed bands 14 immediately below are successively formed when each cylinder reaches the rising limit.Bolts 17 and nuts 18 or lock bands 45 with springs in the fixing band 34Tighten firmlyThe fixing bands 14, 34By fixing, the stretched state can be maintained and fixed.
[0056]
  FIG. 10 and FIG.A reference example for understanding the present invention,An example of a telescopic strut that is composed of a plurality of strut cylinders that are fitted inside and outside in a stretchable manner and that allows the strut cylinders to enter and exit by a wire and pulley system is shown in a contracted or expanded state. The column of the columnReference example of Fig. 1 and Fig. 2Similarly, the telescopic support column is composed of a total of four cylinders, that is, the outer cylinder 1 with the maximum diameter, the intermediate cylinders 2 and 3 inside thereof, and the inner cylinder 54 with the innermost minimum diameter. . In other words, the telescopic support column of the present invention has a minimum basic configuration of the outer cylindrical body 1, the intermediate cylindrical body 2 inside thereof, and the innermost inner cylindrical body 54, and the intermediate cylindrical body 2, as required. It is configured in multiple stages using multiple (required number) 3The
[0057]
  On the ground corresponding to the upper end of the outer cylinder 1 embedded in the ground,1 and 2 reference exampleA winch 5 is installed as a driving means for winding or unwinding the wire 6 in the same manner as in FIG.
[0058]
  The one wire 6 drawn out from the winch 5 is first described above.Reference example of Fig. 1 and Fig. 2Similarly, the suspension pulley 7 provided on the upper end portion from the upper end portion of the outer cylindrical body 1, the suspension pulleys 9 and 61 provided on the upper end or lower end of the first intermediate cylinder body 2 and the second intermediate body 3, or the support The pulley is passed through the pulleys 8 and 10 and is further wound around a support pulley 62 provided at the lower end of the inner cylinder 54.
[0059]
Subsequently, the wire 6 wound around the support pulley 62 provided at the lower end of the inner cylindrical body 54 is wound around another support pulley 62 provided substantially opposite to the support pulley 62, and the U-turn is turned upward. The distal end portion of the wire 6 is fixed to a wire fixing tool 50 provided at the upper end portion of the inner cylindrical body 54. In the case of the illustrated example, a suspension pulley 61 of a fixed band 64, which will be described later, is used as the wire fastener 50, but is not limited thereto. It is implemented in various modes and structures so that the tip of the wire 6 can be fastened near the upper end of the intermediate cylinder 3. For example, the wire 6 is wound around a suspension pulley 61 used as the wire fastening device 50 in the illustrated example, and a U-turn is turned downward, and the tip of the wire 6 is fixed to a guide pulley 65 installed below the suspension pulley 61. Even if it wears, it can carry out suitably. Further, the tip end of the wire 6 may be fixed to the other support pulley 62.
[0060]
  Further, the column cylinder of the telescopic column can be suitably implemented by using an inner cylinder 44 provided with a suspension pulley 63 inside the cylinder as shown in FIG. 12 instead of the inner cylinder 54. In this case, the wire 6 wound around the support pulley 62 of the inner cylinder 44 through the suspension pulley 61 provided at the upper end of the intermediate cylinder 3 is raised along the inner wall surface of the inner cylinder 44, and It winds around the suspension pulley 63 and makes a U-turn downward to the opposite side, descends downward along the inner surface of the inner cylindrical body 44, and wraps around another support pulley 62 provided substantially opposite to the support pulley 62. The tip of the wire 6 is fixed to the wire fixing device 50 in the same manner.2Described invention).
[0061]
Incidentally, in the illustrated example, the suspension pulley 63 is installed at the uppermost part in the inner cylindrical body 44, but is not limited to this position. The inner cylinder 44 may be provided at any position above and below. It is also convenient to configure and implement the suspension shaft of the suspension pulley 63 so that it can rotate horizontally.
By using the inner cylinder 44 provided with the suspension pulley 63 as described above, the expansion and contraction of the inner cylinder can be performed more smoothly.
[0062]
  13 and 14 show the detailed structure of the portion indicated by the reference numeral IV in FIG. That is, an annular fixed band 64 provided with the suspension pulley 61 and a guide pulley 65 associated therewith is attached to the upper end portion of the intermediate cylinder 3. In short, the aboveReference example of FIGS. 3 and 4In the same manner as above, the wire 6 raised upward along the inner wall surface of the intermediate cylinder 3 is passed through the guide pulley 65, the suspension pulley 61, and the support pulley 62 of the inner cylinder 54.TheOf course, the same applies to the inner cylinder 44. Thus, it is not necessary to form a slit on the wall surface of the cylindrical body for passing the wire 6 from the outer cylindrical body to the inner cylindrical body as in the prior art, and the inner and outer diameters of the pulleys 61, 62, 65 are further increased. It is not necessary to provide a diameter difference between the cylinders 3 and 54 (or 44).
[0063]
As illustrated in FIGS. 15 and 16, the fixing band 64 has a half split that is equal to a bisect of the short cylindrical body 64 ′ having a diameter circumscribing the outer peripheral surface of the inner cylindrical body 54 positioned inside. It consists of a cylindrical movable member 64a and a fixed member 64b. The movable member 64a and the fixed member 64b are configured such that one end sides of the movable member 64a and the fixed member 64b are connected to each other by a hinge mechanism 66 so that the movable member 64a and the fixed member 64b can be opened and closed. Has been.
[0064]
  The suspension pulley 61 and the guide pulley 65 are respectively positioned at the upper and lower positions between the two bearing plates 69 and 69 arranged in parallel with the vertical direction of the outer peripheral surface of the short cylindrical body 64 ′ constituting the fixing member 64b. Attached in pairs.
  The fixed band 64 has flanges 70 and 71 above and below the short cylindrical body 64 ′, and the lower flange 71 is superimposed on a flange 72 previously provided by welding or the like on the upper end portion of the intermediate cylindrical body 3. It is attached by joining with bolts 23(ContractClaim3Described invention).
[0065]
The fixed band is not limited to the form and structure illustrated in FIGS. 15 and 16. For example, as in the first embodiment described above, as shown in FIGS. 17 and 18, each cylinder is provided with a lock bolt 45 with a spring for preventing rattling, and is substantially the same as the outer diameter of the inner cylinder 54. It can also be implemented using a fixed band 74 consisting of a short cylinder 74 ′ having a diameter.
[0066]
  Like the fixed band 64, the fixed band 74 is suspended at a vertical position between two bearing plates 79 and 79 arranged in the vertical direction on the outer peripheral surface of the short cylindrical body 74 ′. And have. Further, the fixed band 74 has flanges 80 and 81 on the upper and lower sides of the short cylindrical body 74 ′ in the same manner as the fixed band 64, and the intermediate cylinder 3 is inserted through a hole 96 provided in the flanges 80 and 81. And bolted together (claims above)4Described invention).
[0067]
  On the other hand, at the lower end of the inner cylinder 54 (or 44), in addition to the support pulley 62, a guide roller 24 that rolls against the inner peripheral surface of the outer intermediate cylinder 3 runs around the circumference in the example shown in FIG. Four are installed at intervals of 90 degrees divided into four equal parts.TheThe guide roller 24 eliminates rattling between the intermediate cylinder 3 and the inner cylinder 54 (or 44), and the inner cylinder 54 (or 44) can be expanded and contracted with as little rolling friction as possible. It is light, stable and smooth in the state.
[0068]
  The means for attaching the support pulley 62 and the guide roller 24 is as described above.Reference examples of Figs.The method is almost the same.
  The left and right guide rollers 24 in FIGS. 13 and 14 are installed in a configuration in which the bracket 28 is shared with the support pulley 62 at the upper and lower positions.TheAt the mounting position of the support pulley 62, the mounting flange 25 and the mounting plate 26 on the lower surface side are both discontinuous disks having a gap 90 equivalent to the interval between the two brackets 28, 28. Thus, the wire 6 penetrates in the vertical direction through the gap 90.
[0069]
  Of course, the aboveAs a reference exampleSimilarly to FIG. 4 illustrated as an example, a configuration in which three guide rollers 24 are installed at intervals of 120 degrees obtained by dividing the circumference into three equal parts is also preferable. However, in this case, one of the two left-side guide rollers 24 in FIGS. 3 and 4 is installed in a configuration in which the bracket 28 is shared with the support pulley 62 at the upper and lower positions. Further, at the mounting position of the support pulley 62, the mounting flange 25 and the mounting plate 26 on the lower surface thereof are both described above.Reference exampleIt is comprised as a discontinuous disk which has the clearance gap 30 similarly to.
[0070]
  13 and 14 have been described as representatively showing the IV part of FIG. 11, but in the telescopic support shown in FIG. 11, the relationship between the lower outer cylindrical body 51 and the intermediate cylindrical body 52, and Regarding the relationship between the upper second intermediate cylinder 53 and the inner cylinder 54,Reference example of FIGS. 3 and 4It is configured in the same way. Of course, as a fixed band used for the configuration in the relationship between the lower outer cylindrical body 51 and the intermediate cylindrical body 52 and the relationship between the upper second intermediate cylindrical body 53 and the inner cylindrical body 54,the aboveofReference exampleIn addition to the fixed band 14 used in the above, the fixed bands 64 and 74 can be preferably used.
[0071]
In addition, because of the above configuration, the field assembly of the telescopic support of the present invention is the aboveReference exampleAs is the case with the above, it is relatively easy and easy to assemble.
  The telescopic support of this embodiment is still the aboveReference exampleIn the same manner as described above, the extension operation can be performed with a relatively small load by the boosting mechanism of the wire-6 and the suspension pulley and the support pulley. The extension operation of the telescopic strut is basically the same as the above.Reference exampleDone in the same way.
[0072]
  By the way, the strut extended to the highest position isReference exampleSimilarly, pin holes 82 and 92 (see FIGS. 15 and 17) provided in the fixing bands 64 and 74 and a pin hole 83 (see FIG. 13) provided in the lower part of each cylinder are skewered by the stopper pin 31. Can be fixed and stopped.TheTherefore, the aboveReference exampleSimilarly to the above, the winch driving motor and the like can be configured as a separable and portable type to reduce the cost.
[0073]
  Furthermore, the telescopic support column according to the above configuration of the present invention can be used in the following manner.
  For example, the movable member 64a of the fixed band 64 illustrated in FIG.Reference example of FIGS. 3 and 4In the same manner as the movable member 14 a of the fixed band 14, the bolt 17 and the nut 18 are firmly tightened and fixed to the outer peripheral surface of the inner second intermediate cylinder 3 beforehand. Then, since the expansion / contraction operation between the cylinders 2 and 3 is stopped by the frictional force, when the winch 5 is driven and the extension operation is started, the inner cylinder 54 (or 44) is pulled out. 54 (or 44) alone does not rise, and the two together with the intermediate cylinder 3 perform the raising operation. Therefore, the maximum position of the telescopic support in this case is reduced to the height by the two cylinders, and the usability is excellent.
[0074]
  The above-described effect is also achieved in the fixing band 74 shown in FIG. 17 and the like by strongly tightening the spring-loaded lock bolt 45 of the fixing band 74 so that a frictional force is generated between the cylinders 54 (or 44) and 3. It is produced in the same way by generating and preventing rattling(ContractClaim4Described invention).
[0075]
In addition, when the above-described effects are applied, in the above-described extending operation, the bolts 17 and the nuts 18 in the fixing bands 14 and 64 immediately below and the fixing bands 34 and 74 in the stages immediately below when the cylinders reach the rising limit. By firmly tightening the lock bolt 45 with a spring and fixing the fixing bands 14, 34, 64, 74, the extended state can be maintained and fixed.
[0076]
  less than,Claim1Telescopic strut according to the invention described inExamples ofTheexplain.
[0077]
  FIGS. 19 and 20 each show an example of a telescopic strut that is composed of a plurality of strut cylinders that are telescopically fitted inside and outside, and that allows each strut cylinder to enter and exit by a wire and pulley system in a contracted or expanded state. . As in the first and second embodiments described above, the columnar cylinder includes the outermost cylindrical body 1 having the maximum diameter, the intermediate cylindrical bodies 2 and 3 inside thereof, and the innermost cylindrical cylinder 54 having the smallest diameter. The telescopic support | pillar which consists of a total of four cylinders is shown. In other words, the telescopic support column of the present invention has the minimum basic configuration of the outer cylindrical body 1, the intermediate cylindrical body 2 inside thereof, and the innermost inner cylindrical body 54, and if necessary, the intermediate cylindrical body 2, It is configured in multiple stages using multiple (required number) 3The
[0078]
On the ground corresponding to the upper end of the outer cylindrical body 51 embedded in the ground, a winch 5 as a driving means for winding or unwinding the wire 6 is provided as in the first or second embodiment. is set up.
[0079]
  One wire 6 pulled out from the winch 5 is as described above.12 and 13 Reference exampleSimilarly, first, a suspension pulley 57 provided on the upper end portion from the upper end portion of the outer cylindrical body 1, and a suspension pulley 59 provided on the upper end or lower end of the first intermediate cylinder 2 and the second intermediate body 3, 61 or support pulleys 58 and 60 and another support pulley 62 provided around the support pulley 62 provided at the lower end of the inner cylinder 54 and further provided with the wire 6 wound around the support pulley 62 substantially opposite to the support pulley 62. Wrap around the support pulley 62 and make a U-turn upward.
[0080]
Subsequently, the wire 6 which is U-turned upward is wound around the suspension pulley 61 provided substantially opposite to the suspension pulley 61 of the second intermediate cylindrical body 3 to be U-turned downward, and the second intermediate It is lowered along the inner wall surface of the cylindrical body 3 and is wound around a supporting pulley 60 provided substantially opposite to the supporting pulley 60 of the second intermediate cylindrical body 3 so as to make a U-turn upward. Furthermore, the intermediate cylinder 2 is provided substantially opposite to the suspension pulley 59. Wrapped around the suspended pulley 59 and made a U-turn downward, lowered along the inner wall surface of the intermediate cylinder 2 and wound around the support pulley 58 provided substantially opposite to the support pulley 58 of the intermediate cylinder 2 It is hung and U-turned upward, and the tip end portion of the wire 6 is fastened to a wire fastening device 50 provided at the upper end portion of the outer cylindrical body 1. In the case of the illustrated example, the suspension pulley 57 of the fixed band 64 is used as the wire fastening device 50, but is not limited thereto. The front end of the wire 6 can be fixed in the vicinity of the upper end portion of the outer cylinder 1 in various modes and structures. For example, in the illustrated example, the tip of the wire 6 may be fixed to the other support pulley 58.
[0081]
  In addition, the column body of the telescopic column is as described above.Reference exampleSimilarly to the above, it can be suitably implemented by using an inner cylinder 44 provided with a suspension pulley 63 inside the cylinder as shown in FIG. 21 instead of the inner cylinder 54. In this case, againReference exampleSimilarly, the wire 6 passes through the suspension pulley 63 from the support pulley 62 of the inner cylinder 44 and further passes through the suspension pulley 62 provided substantially opposite to the support pulley 62, and then the inner cylinder. 44 is launched along the inner wall surface of claim 44.2Described invention).
[0082]
  In addition, the aboveReference exampleSimilarly to the above, the part where the suspension pulley 63 is installed is not limited to the uppermost part of the inner cylindrical body 44 and may be provided at any position above and below. The suspension pulley 63 is also fixed to the inner cylindrical body 44 in the same manner as in the second embodiment.
[0083]
As described above, the wire 6 is stretched approximately symmetrically with respect to the axis of the support column, and the tension of the wire 6 applied to each cylindrical body 2, 3, 54 (or 44) during expansion and contraction is applied approximately symmetrically with respect to the axis. The cylindrical body can be expanded and contracted smoothly in the vertical direction without rattling.
[0084]
  FIG. 22 shows the details of the structure of the part indicated by the symbol V in FIG. That is, the fixed band 64 or the fixed band 74 is attached to the upper end portion of the intermediate cylinder 2, and the above describedReference exampleThe wire 6 is stretched from the intermediate cylinder 2 to the second intermediate body 3 via the guide pulley 65, the suspension pulley 59, and the support pulley 60 of the second intermediate body 3 in the same manner.TheTherefore, a slit for passing the wire 6 from the outer cylinder to the inner cylinder is formed in the cylinder wall surface as in the prior art, or the inner and outer cylinders 2 and 3 have a diameter corresponding to the diameter of the pulleys 59, 60, 65. There is no need to make a difference.
[0085]
  The lower end portion of the second intermediate cylinder 3 is as described above.Reference exampleThe guide roller 24 which rolls and hits the inner peripheral surface of the outer first intermediate cylindrical body 2 is installed by the same configuration as in FIG.TheTherefore, the expansion and contraction operation of the intermediate cylinder 3 can be performed lightly and stably.
  The means for attaching the support pulley 62 and the guide roller 24 is as described above.Reference exampleThe method is almost the same.
[0086]
  FIG. 22 has been described as representatively showing the V portion of FIG. 11, but in the telescopic support shown in FIG. 11, the relationship between the lower outer cylindrical body 1 and the intermediate cylindrical body 2, and the upper second It should be understood that the relationship between the intermediate cylinder 3 and the inner cylinder 54 (or 44) is similarly configured.
  In addition, because of the above-described configuration, the on-site assembly of the telescopic column of the present invention has been described above.Reference exampleAs is the case with the above, it is relatively easy and easy to assemble.
[0087]
  The telescopic column of the present embodiment has two boost mechanisms each composed of a wire 6 and a suspension pulley and a support pulley for the intermediate cylinders 2 and 3 and the inner cylinder 54 (or 44) extending in the vertical direction. Have. Therefore, the aboveReference exampleThe winch 5 can be made to extend the column with a load that is a fraction of a smaller than that of the winch 5. In addition, the extension operation | movement of the expansion-contraction support | pillar in this embodiment was basically mentioned above.1 and 2ofReference exampleDone in the same way.
[0088]
  By the way, the column that extended to the highest positionReference exampleLike the above, pin holes 82 and 92 (see FIGS. 15 and 17) provided in the fixing bands 64 and 74 and a pin hole 84 (see FIG. 22) provided in the lower part of each cylinder are skewered by the stopper pin 31. Can be fixed to stop the expansion and contraction of the supportTheTherefore, the aboveReference exampleSimilarly to the above, it is possible to reduce the cost by configuring a winch drive motor or the like in a separable carrying type.
[0089]
  Furthermore, the telescopic support column according to the above configuration of the present invention can be used in the following manner.
  For example, the movable member 64a of the fixed band 64 is described above.Reference exampleIn the same manner as the movable member 14 a of the fixed band 14, the bolt 17 and the nut 18 are firmly tightened and fixed to the outer peripheral surface of the inner second intermediate cylinder 3 beforehand. Then, since the expansion / contraction operation between the cylinders 2 and 3 is stopped by the frictional force, when the winch 5 is driven and the extension operation is started, the inner cylinder 54 (or 44) is pulled out. 54 (or 44) alone does not rise, and the two together with the intermediate cylinder 3 perform the raising operation. Therefore, the maximum position of the telescopic support in this case is reduced to the height by the two cylinders, and the usability is excellent.
[0090]
  The above-described effect is also achieved in the fixed band 74 by strongly tightening the spring-loaded lock bolt 45 of the fixed band 74 to generate a frictional force between the cylinders 54 (or 44) and 3, and rattling. By preventing, played as wellThe
[0091]
In addition, when the above-described operation and effect are applied, in the above-described extension operation, the bolts 17 and nuts 18 in the fixing band 64 immediately below and the lock bolts with springs in the fixing band 74 are successively provided when each cylinder reaches the rising limit. By firmly tightening 45 and fixing the fixing bands 64 and 74, the extended state can be maintained and fixed.
[0092]
  AboveReference exampleIn the embodiment, the cross-sectional shape of each of the cylinders 1 to 4, 44, and 54 is circular, but this is not a limitation. It is also possible to implement with a polygonal cylinder such as a square or a hexagon. In that case, the term “diameter line direction” described above should be understood as a straight line passing through the center of the tube.
[0093]
  Further, each of the cylinders 1 to 4, 44, 54 is a cylinder made of punching metal in which an infinite number of small holes are regularly arranged, or a plurality of vertical load supporting vertical axes arranged along the circumference. It is also suitably implemented using a net-structured tubular body composed of a steel bar and a wound steel wire wound around the outer periphery and restrained to bear a bending load.TheBy making each cylindrical body 1-4, 44, 54 into the said structure, a significant weight reduction can be achieved, and the workability | operativity in conveyance and installation construction can be improved remarkably. In general, since wind loads act on the support columns, it is essential to design the wind loads in consideration of them, and there is a problem that the entire width of the support columns becomes large and weight increases accordingly. However, by making each cylindrical body 1-4, 44, 54 of the struts into the net structure, the wind load can be greatly reduced, and as a result, the maximum overall height of the telescopic strut can be increased. You can also.
[0094]
The preferred embodiments of the present invention have been described above. However, other than the embodiments of the present invention, various applications and modifications usually performed by those skilled in the art are possible without departing from the spirit of the present invention. I will add that. For example, in the telescopic support column shown in FIG. 11, another support pulley is provided at the lower end of the second intermediate cylinder so as to face the support pulley 10, and a fixed band is provided at the upper end of the first intermediate cylinder 2. 64 is installed. Then, the end of the wire 6 is simply wound around the suspension pulley 61 without being fixed, and is turned downward U-turn, and is wound around the guide pulley 65 and downward along the inner wall surface of the second intermediate cylinder 3. Even when the intermediate cylinder 3 is wound around another supporting pulley of the same intermediate cylinder 3 to make an upward U-turn and is fixed to the suspension pulley of the fixed band 64 installed at the upper end of the first intermediate cylinder 2. The invention can be suitably implemented. Furthermore, without being fixed to the suspension pulley of the fixed band 64 installed at the upper end of the first intermediate cylinder 2, it is simply wrapped and U-turned downward, and installed at the upper end of the first intermediate cylinder 2. Fixed to the guide pulley of the fixed band 64 In addition, the present invention can be suitably implemented.
[0095]
【The invention's effect】
  Claims 1 to6The telescopic support column according to the invention described in 1 is configured to solve all of the above-mentioned drawbacks and problems of the prior art.
  In other words, the existence of multiple pulleys never requires a special diameter difference between the inner and outer column cylinders, and it is smart and extremely lightweight by minimizing the diameter difference between the inner and outer cylinders. Can be configured.
[0096]
Of course, it is not necessary to form a slit through the pulley and wire between the inner and outer support column bodies on the cylinder wall surface. Because it is only a small part that winds around the pulley, it is possible to provide a telescopic support column with excellent appearance design.
[0097]
In addition, the state where the column is extended to the maximum extent is fixed with a stopper pin to eliminate the load on the winch, or one or more arbitrarily selected from a plurality of moving column cylinders are integrated with a fixed band. It is also possible to extend and contract, so it is easy to use and has a high degree of freedom in setting the number of expansion / contraction steps and stroke size. In addition, it is relatively inexpensive and easy to maintain.With excellent workabilityA telescopic support can be provided.
[0098]
  Furthermore,Of the present inventionAccording to the telescopic strut, the wire is stretched substantially symmetrically with respect to the axis of the strut, and the tension of the wire can be applied substantially symmetrically with respect to the axis, so that each cylinder is more stable without rattling. It can be smoothly expanded and contracted in the vertical direction.
[Brief description of the drawings]
FIG. 1 shows the present invention.Examples for understandingIt is sectional drawing which showed notionally the state which contracted the telescopic support | pillar which concerns on to the lowest position.
[Figure 2]SaidIt is sectional drawing which showed notionally the state which extended the expansion-contraction type support | pillar to the highest position.
FIG. 3 is a cross-sectional view showing the detailed structure of a portion indicated by reference numeral III in FIG.
4 is a sectional view taken along line VI-VI in FIG. 3;
[Figure 5]SolidIt is a perspective view of a constant band.
[Fig. 6]SolidIt is the horizontal sectional view which showed the combination of the constant band and the stopper pin.
7 is a perspective view of a portion taken along arrow VII in FIG. 2. FIG.
[Fig. 8]DifferentIt is a perspective view of a fixed band.
FIG. 9DifferentIt is the horizontal sectional view which showed the combination of the fixed band and stopper pin which become.
FIG. 10 shows the present invention.Reference examples for understandingIt is sectional drawing which showed notionally the state which contracted the telescopic support | pillar which concerns on to the lowest position.
FIG. 11SaidIt is sectional drawing which showed notionally the state which extended the expansion-contraction type support | pillar to the highest position.
FIG. 12 is a cross-sectional view illustrating a use state of an inner cylinder having a suspension pulley inside.
13 is a cross-sectional view showing details of the structure of a portion indicated by reference numeral IV in FIG.
14 is a cross-sectional view taken along line -VIII-VIII in FIG.
FIG. 15SolidIt is a perspective view of a constant band.
FIG. 16SolidIt is the horizontal sectional view which showed the combination of the constant band and the stopper pin.
FIG. 17DifferentIt is a perspective view of a fixed band.
FIG. 18DifferentIt is the horizontal sectional view which showed the combination of the fixed band and stopper pin which become.
FIG. 19 shows the present invention.The fruitIt is sectional drawing which showed notionally the state which contracted the telescopic support | pillar which concerns on embodiment to the lowest position.
FIG. 20SaidIt is sectional drawing which showed notionally the state which extended the expansion-contraction type support | pillar to the highest position.
FIG. 21 is a cross-sectional view illustrating a use state of an inner cylinder having a suspension pulley inside.
22 is a cross-sectional view showing details of the structure of a portion indicated by a symbol V in FIG. 20;
[Explanation of symbols]
  1 Outer cylinder
  2, 3 Intermediate cylinder
  4, 44, 54 Inner cylinder
  6 wires
  7, 9, 11, 57, 59, 61, 63 Hanging pulley
  8, 10, 12, 58, 60, 62 Support pulley
  5 winches
  24 Guide roller
  15, 65 induction pulley
  14, 34, 64, 74 Fixed band
  14 ', 34', 64 ', 74' cylinder
  14a, 64a Movable member
  14b, 64b fixing member
  16, 66 Hinge mechanism
  17 volts
  18 nuts
  19, 39, 69, 79 Bearing plate
  20, 40, 70, 80 Upper flange
  21, 41, 71, 81 Lower flange
  22, 72 flange
  23 volts
  31 Stopper pin

Claims (6)

内外に伸縮自在に嵌め合わされた複数の支柱筒体から成り、ワイヤーと滑車方式により各支柱筒体を出入りさせる伸縮式支柱において、
支柱筒体は１本の外側筒体と１本又は複数本の中間筒体及び１本の内側筒体の少なくとも３本から成り、ワイヤーは外側筒体の上端部に設けた吊り滑車を経由させ、中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせ、同中間筒体の内壁面に沿って上方へ立ち上がらせ、同中間筒体の上端に設けた吊り滑車へ巻き掛けて下向きにＵターンさせて内側筒体の下端に設けた支持滑車へ巻き掛け、更に同内側筒体の反対側の下端に設けた支持滑車へ巻き掛けて上向きにターンさせ、前記中間筒体の上端に設けた吊り滑車へ巻き掛けて下向きにＵターンさせ、同中間筒体の内壁面に沿って下方へ降ろし、同中間筒体の下端に設けた支持滑車へ巻き掛けて上向きにＵターンさせたワイヤーの先端部が前記外側筒体の上端部近傍に止着されていること、
外側筒体の上端に設けた前記吊り滑車を経由して外方へ延びるワイヤーを巻き上げ又は巻き下ろす駆動手段が併設されていること、
少なくとも中間筒体及び内側筒体の下端部に、外側の筒体内周面に当たって転がり走るガイドローラが複数設置されていること、
をそれぞれ特徴とする、伸縮式支柱。In the telescopic strut that consists of a plurality of strut cylinders that are telescopically fitted inside and outside, and that allows each strut cylinder to enter and exit by wire and pulley system,
The column cylinder consists of at least three of one outer cylinder, one or more intermediate cylinders, and one inner cylinder, and the wire passes through a suspension pulley provided at the upper end of the outer cylinder. , Wrap around a support pulley provided at the lower end of the intermediate cylinder and make an U-turn upward, rise upward along the inner wall surface of the intermediate cylinder, and wrap around a suspension pulley provided at the upper end of the intermediate cylinder U-turns downward and wraps around a support pulley provided at the lower end of the inner cylinder, and further wraps around a support pulley provided at the lower end on the opposite side of the inner cylinder and turns upward, Wrap around a suspension pulley provided at the upper end and make a U-turn downward, lower down along the inner wall surface of the intermediate cylinder, and wrap around a support pulley provided at the lower end of the intermediate cylinder to make an U-turn upward The tip of the wire is fastened near the upper end of the outer cylinder. To have it,
A driving means for winding or unwinding a wire extending outwardly via the suspension pulley provided at the upper end of the outer cylindrical body;
A plurality of guide rollers that roll and run against the outer circumferential surface of the outer cylindrical body at least at the lower end of the intermediate cylindrical body and the inner cylindrical body;
Retractable struts characterized by each. 内側筒体は、筒体内部に吊り滑車を備えており、
中間筒体の上端に設けた吊り滑車を経て内側筒体の下端に設けた支持滑車へ巻き掛けたワイヤーは、内側筒体の内壁面に沿って立ち上がらさせ、前記内側筒体の吊り滑車へ巻き掛けて下向きに反対側へＵターンさせ、同内側筒体の内側面に沿って下方へ降ろし、同内側筒体の下端に設けた支持滑車へ巻き掛けていることを特徴とする、請求項１に記載した伸縮式支柱。The inner cylinder has a suspension pulley inside the cylinder,
The wire wound around the support pulley provided at the lower end of the inner cylinder through the suspension pulley provided at the upper end of the intermediate cylinder rises along the inner wall surface of the inner cylinder and winds around the suspension pulley of the inner cylinder. is U-turn to the other side downwards over, down downward along the inner surface of the inner tubular body, characterized in that it wound around the support pulleys provided at the lower end of the inner cylinder, according to claim 1 The telescopic support described in 1. 少なくとも外側筒体及び中間筒体の上端部に、吊り滑車及び誘導滑車を備えた環状の固定バンドが取り付けられていること、
固定バンドは、内側の筒体外周面に外接する直径の筒体を二分したに等しい半割筒状の可動部材と固定部材から成り、可動部材と固定部材はそれぞれの一端側をヒンジ機構により開閉自在に連結され、他端側はボルト、ナットで連結し締め付け可能であること、
固定部材の外周面の上下方向に配置された２本の軸受けプレートの間の上下の位置に吊り滑車と誘導滑車が取り付けられていること、
固定バンドは、その下側フランジが、外側筒体又は中間筒体の上端部に設けたフランジと重ね合わされボルト接合で取り付けられていること、
をそれぞれ特徴とする、請求項１又は２に記載した伸縮式支柱。An annular fixed band having a suspension pulley and a guide pulley is attached to at least the upper ends of the outer cylinder and the intermediate cylinder,
The fixed band is composed of a halved cylindrical movable member and a fixed member that are equal to a cylinder with a diameter circumscribing the outer peripheral surface of the inner cylindrical member, and the movable member and the fixed member are each opened and closed by a hinge mechanism. It can be connected freely and the other end can be connected with bolts and nuts and tightened.
A suspension pulley and a guide pulley are attached to the upper and lower positions between two bearing plates arranged in the vertical direction of the outer peripheral surface of the fixing member;
The fixing band has its lower flange overlapped with the flange provided at the upper end of the outer cylinder or the intermediate cylinder, and is attached by bolt joining.
The telescopic strut according to claim 1 or 2 , characterized by each of the above. 少なくとも外側筒体及び中間筒体の上端部に、吊り滑車及び誘導滑車を備えた環状の固定バンドが取り付けられていること、
固定バンドは、内側の筒体の外径と略同径の直径を有する筒体から成り、スプリング付ロックボルトにより締め付け可能とされていること、
固定部材の外周面の上下方向に配置された２本の軸受けプレートの間の上下の位置に吊り滑車と誘導滑車が取り付けられていること、
固定バンドは、その下側フランジが、外側筒体又は中間筒体の上端部に設けたフランジと重ね合わされボルト接合で取り付けられていること、
をそれぞれ特徴とする、請求項１又は２に記載した伸縮式支柱。An annular fixed band having a suspension pulley and a guide pulley is attached to at least the upper ends of the outer cylinder and the intermediate cylinder,
The fixing band is composed of a cylinder having a diameter substantially the same as the outer diameter of the inner cylinder, and can be tightened by a lock bolt with a spring.
A suspension pulley and a guide pulley are attached to the upper and lower positions between two bearing plates arranged in the vertical direction of the outer peripheral surface of the fixing member;
The fixing band has its lower flange overlapped with the flange provided at the upper end of the outer cylinder or the intermediate cylinder, and is attached by bolt joining.
The telescopic strut according to claim 1 or 2 , characterized by each of the above. 中間筒体又は内側筒体の下端部の一つのガイドローラが、同下端部に設ける支持滑車と共通の支持体で上下の位置に設置されていることを特徴とする、請求項１に記載した伸縮式支柱。One guide roller of the lower portion of the intermediate cylinder or inner cylinder, characterized in that it is installed in position in the vertical in a common support and the support pulley provided in the lower part, according to claim 1 Telescopic support. 中間筒体又は内側筒体の下端部の二つのガイドローラが、同下端部に設ける支持滑車と共通の支持体で上下の位置に設置されていることを特徴とする、請求項１に記載した伸縮式支柱。2. The guide roller according to claim 1 , wherein the two guide rollers at the lower end of the intermediate cylinder or the inner cylinder are installed at upper and lower positions on a support common to the support pulley provided at the lower end. Telescopic support.
JP2002290668A 2001-10-17 2002-10-03 Telescopic prop Expired - Fee Related JP3965350B2 (en)

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