JP2004092840A

JP2004092840A - Expansion section wedge type fixing apparatus in expansion double pipe

Info

Publication number: JP2004092840A
Application number: JP2002257438A
Authority: JP
Inventors: Sadami Tsujibayashi; 辻林　定美; Natsuo Miyazaki; 宮崎　夏雄; Fumio Nishikawa; 西川　文夫
Original assignee: Mory Industries Inc
Current assignee: Mory Industries Inc
Priority date: 2002-09-03
Filing date: 2002-09-03
Publication date: 2004-03-25
Anticipated expiration: 2022-09-03
Also published as: JP3728431B2

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wedge and a large-diameter pipe from slipping in the direction of a pipe axis center between the contact surfaces for position deviation in the transition period of wedge-clamping operation. <P>SOLUTION: A wedge guide 4 is fixed to a small-diameter pipe 2 and is inserted into the large-diameter pipe 1. A wedge 5 is inserted into a wedge chamber 6 between the wedge guide 4 and the large-diameter pipe 1. A wedge-pushing tool 7 for pushing the wedge 5 to a wedge clamped side is provided at the small-diameter pipe 2 via a slidable rotation transmission means 8 so that it can be relatively slid and cannot be relatively rotated. A pivoting type cam surface 9 is formed on the outer periphery surface of the wedge pushing tool 7. A pivoting type wedge chamber 10 is formed between the pivoting type cam surface 9 and the large-diameter pipe 1. A pivoting operation type wedge 11 is inserted into the pivoting type wedge chamber 9. The pivoting operation type wedge 11 is composed so that it is pressed to the wedge clamped side on the turning type cam surface 9 for performing the wedge friction fixation of the wedge pushing tool 7 to the large-diameter pipe 1 based on the relative rotary operation of the large-diameter pipe 1 and the small-diameter pipe 2 to the wedge clamping side. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、伸縮二重管の伸縮部楔式固定装置に関する。
この伸縮部楔式固定装置を具えた伸縮二重管の用途としては、例えば、建物の左右両側壁間に突っ張らせて摩擦固定する吊持棒、または建物の床・天井間に突っ張らせて摩擦固定する物干し用支柱などがある。
【０００２】
【前提構成】
本発明の伸縮二重管の伸縮部楔式固定装置は、例えば図１・図２、図３（本発明）、または図４（従来技術）に示すように、次の前提構成を有するものを対象とする。
【０００３】
図１・図２は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態１を示す。図１（Ａ）は伸縮二重管製の突っ張り固定式吊持棒の使用状態の一部切除正面図。図１（Ｂ）は図１（Ａ）のＢ部の縦断正面図、図１（Ｃ）は図１（Ｂ）のＣ−Ｃ線断面図、図１（Ｄ）は図１（Ｂ）のＤ−Ｄ線断面図。　図２は図１（Ａ）のＩＩ部の縦断正面図である。
【０００４】
図３は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態２を示す。図２（Ａ）は図１（Ｂ）に相当する要部の縦断正面図。図２（Ｂ）は図２（Ａ）のＢ−Ｂ線断面図である。
【０００５】
図４は従来技術の伸縮二重管の伸縮部楔式固定装置を示し、図１（Ｂ）に相当する要部の縦断正面図である。
【０００６】
伸縮二重管の伸縮部楔式固定装置を構成する大径管（１）に小径管（２）を伸縮可能に挿入する。この大径管（１）と小径管（２）とに亙って楔式固定装置（３）を設ける。
【０００７】
この楔式固定装置（３）は小径管（２）と同心状となるテーパー状の楔ガイド（４）と楔（５）とを具える。大径管（１）と小径管（２）とを収縮操作することに基づき、楔（５）が小径管（２）の軸心方向に沿って楔ガイド（４）で楔締め付け側に案内されて、大径管（１）と小径管（２）とを楔摩擦固定するように構成したものである。
【０００８】
【従来の技術】
上記前提構成において、楔ガイド（４）および楔（５）を組付けるための具体的な構成として、従来技術では次のものがある。
○　従来技術．　図４参照．　（特開平９−２５７０１６号公報）
図４は従来技術の伸縮二重管の伸縮部楔式固定装置を示し、図１（Ｂ）に相当する要部の縦断正面図である。
【０００９】
前記楔ガイド（４）は大径管（１）の管端部に外嵌させてビス（５１）で固定する。楔（５）は楔ガイド（４）と小径管（２１）との間の楔室（５２）に挿入する。楔（５）は楔ケース（５３）と楔ケース蓋（５４）との間に挟持固定する。楔ケース（５３）は楔ガイド（４）および大径管（１）に摺動自在に外嵌させたものである。
【００１０】
【特許文献１】
特開平９−２５７０１６号公報
【００１１】
【発明が解決しようとする課題】
上記従来技術では、次の問題がある。
［　イ．　楔（５）の楔締付け作動の過渡期において、楔（５）と小径管（２）との接触面間で管軸心方向への辷り出しによる位置ずれが生じることから、次の問題点▲１▼・▲２▼および▲３▼が生じる。　すなわち、▲１▼楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）との伸縮調節・固定後の管長さの実長が、伸縮調節時の目標調節長さよりも可成り短くなってしまう事、　▲２▼楔（５）と小径管（２）との辷り出し寸法が特定しないため、上記▲１▼の伸縮調節固定後の短くなる管長誤差がランダムに現れるので、目標調節長さになるように正確に管理することができない事、　▲３▼そして、楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）とを収縮させるための楔締め付け用管収縮操作装置（図１（Ａ）の符号（１３）に相当するもの）の全長を余分に長くしなければならない事、　と云う問題点▲１▼・▲２▼・▲３▼が生じる。　］
【００１２】
大径管（１）と小径管（２）とを、伸縮させて所望の管長さに調節した後に、固定するための手順を次に述べる。　（特開平９−２５７０１６号公報の明細書の発明の詳細な説明の段落番号［００１３］に記載）．
図４において、まず、大径管（１）に対して楔ケース（５３）を右側へ移動させる。すると、楔（５）は右側へ押し込まれて、楔ガイド（４）に案内されて小径管（２）の外周面に少し接触する。
【００１３】
次に、大径管（１）に対して小径管（２）を右側へ収縮移動させる。すると、楔（５）は小径管（２）に対して、多少辷りながら右側へ引きずられて行って、大径管（１）と小径管（２）とを、楔ガイド（４）および楔（５）を介して、楔摩擦固定するのである。
【００１４】
以上のように、大径管（１）と小径管（２）とを、所望の長さに伸縮調節した後に、固定して行くときの動作において、楔（５）が楔ガイド（４）に案内されて小径管（２）へ圧し付けられて行く楔締付け作動の過渡期に、楔（５）が小径管（２）に対して多少辷って行く分だけ、楔（５）と小径管（２）との接触面間で管軸心方向への辷り出しによる位置ずれが生じる。
【００１５】
これにより、次の問題点▲１▼・▲２▼および▲３▼が生じる。すなわち、問題点：　▲１▼楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）との伸縮調節・固定後の管長さの実長が、伸縮調節時の目標調節長さよりも可成り短くなってしまう事。　▲２▼楔（５）と小径管（２）との辷り出し寸法が特定しないため、上記▲１▼の伸縮調節・固定後の短くなる管長誤差がランダムに現れるので、目標調節長さになるように正確に管理することができない事。　▲３▼そして、楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）とを収縮させるための楔締め付け用管収縮操作装置（図１（Ａ）の符号（１３）に相当するもの）の全長を余分に長くしなければならない事である。
【００１６】
［　ロ．　楔式固定装置（３）を構成する楔（５）および楔ケース（５３）は、大径管（１）および小径管（２）の外周空間に突出するため、他物が大径管（１）の外周空間を左側へ移動して楔ケース（５３）に衝突したときに、楔（５）を弛み側へ移動させて、両管（１）（２）の楔（５）での固定が脱落する事故が発生することがある。　］
【００１７】
楔式固定装置（３）を構成するテーパー状楔ガイド（４）・楔（５）・楔ケース（５３）および楔ケース蓋（５４）は、大径管（１）および小径管（２）の外周空間に突出する。これにより、他物が大径管（１）の外周空間を左側へ移動して楔ケース（５３）に衝突したときに、楔（５）を弛み側へ移動させて、両管（１）（２）の楔（５）での固定が脱落する事故が発生することがある。
【００１８】
本発明の課題は、次のようにすることにある。
［イ］．楔の楔締付け作動の過渡期において、楔と大径管との接触面間で管軸心方向への辷り出しによる位置ずれが生じないようにすることにより、従来技術の問題点：▲１▼楔と小径管とが管軸心方向へ辷り出した寸法分だけ、大径管と小径管との伸縮調節・固定後の管長さの実長が、伸縮調節時の目標調節長さよりも可成り短くなってしまう事、▲２▼楔と小径管との辷り出し寸法が特定しないため、上記▲１▼の伸縮調節固定後の短くなる管長誤差がランダムに現れるので、目標調節長さになるように正確に管理することができない事、▲３▼そして、楔と小径管とが管軸心方向へ辷り出した寸法分だけ、大径管と小径管とを収縮させるための楔締め付け用管収縮操作装置の全長を余分に長くしなければならない事、と云うこの問題点▲１▼・▲２▼・▲３▼の全てを解消する。
【００１９】
［ロ］．楔式固定装置を構成する全ての部品は大径管の外周に突出しないようにすることにより、他物が大径管の外周を移動するときに楔に衝突して、両管の楔での固定が脱落する事故を無くす。
［ハ］．円錐面螺旋ガイド形カム面はカム上り傾斜角度を緩やかにすることにより、大径管と小径管とを楔締め付け方向に相対回転させる操作力を小さくして、旋回作動形楔の楔締め付け方向への両管の相対回転操作を軽い力で楽に行えるようにする。
【００２０】
【課題を解決するための手段】
本発明の伸縮二重管の伸縮部楔式固定装置は、上記前提構成において、上記課題を解決するために、例えば図１・図２、または３図に示すように、次の特徴構成を追加したことを特徴とする。
【００２１】
図１・図２は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態１を示す。図１（Ａ）は伸縮二重管製の突っ張り固定式吊持棒の使用状態の一部切除正面図。図１（Ｂ）は図１（Ａ）のＢ部の縦断正面図、図１（Ｃ）は図１（Ｂ）のＣ−Ｃ線断面図、図１（Ｄ）は図１（Ｂ）のＤ−Ｄ線断面図。　図２は図１（Ａ）のＩＩ部の縦断正面図である。
【００２２】
図３は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態２を示す。図２（Ａ）は図１（Ｂ）に相当する要部の縦断正面図、図２（Ｂ）は図２（Ａ）のＢ−Ｂ線断面図である。
【００２３】
○　発明１．　請求項１．　図１・図２、または図３参照．
前記楔ガイド（４）は小径管（２）に固設して大径管（１）内に挿入する。楔（５）は楔ガイド（４）と大径管（１）との間の楔室（６）に挿入する。
大径管（１）の内部で、楔（５）を楔締め付け側へ押し込むための楔押込み具（７）は小径管（２）に対して、摺動可能回転伝動手段（８）を介して相対摺動可能で相対回転不能に設ける。
【００２４】
楔押込み具（７）の外周面に旋回形カム面（９）を形成する。この旋回形カム面（９）と大径管（１）との間に旋回形楔室（１０）を形成する。この旋回形楔室（９）に旋回作動形楔（１１）を挿入する。
この旋回作動形楔（１１）は、大径管（１）と小径管（２）とを楔締め付け側へ相対回転操作することに基づき、旋回形カム面（９）で楔締め付け側へ押し込まれて行って、大径管（１）に楔押込み具（７）を楔摩擦固定するように構成したものである。
【００２５】
○　発明２．　請求項２．　図１・図２参照．
この発明２は、上記発明１において、次の特徴構成を追加したことを特徴とする。
【００２６】
前記楔（５）を楔締め付け側へ作動させるために、大径管（１）と小径管（２）とを管収縮側に押圧する楔締め付け用管収縮操作装置（１３）を、大径管（１）と小径管（２）との少なくとも一方に設けた、ことを特徴とする。
【００２７】
○　発明３．　請求項３．　図１・図２参照．
この発明３は、上記発明１または２において、次の特徴構成を追加したことを特徴とする。
【００２８】
前記旋回形カム面（９）は、円錐面（１５）から螺旋ガイド突条（１６）を突設して形成した円錐面螺旋ガイド形カム面（１７）から成る、ことを特徴とする。
【００２９】
【発明の効果】
本発明の伸縮二重管の伸縮部楔式固定装置は、つぎの効果を奏する。
○　発明１．　請求項１．　図１・図２、または図３参照．
【００３０】
［　イ．　楔（５）の楔締付け作動の過渡期において、楔（５）と大径管（１）との接触面間で管軸心方向への辷り出しによる位置ずれが生じないことから、　図４に示す従来技術の問題点：　▲１▼楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）との伸縮調節・固定後の管長さの実長が、伸縮調節時の目標調節長さよりも可成り短くなってしまう事、　▲２▼楔（５）と小径管（２）との辷り出し寸法が特定しないため、上記▲１▼の伸縮調節固定後の短くなる管長誤差がランダムに現れるので、目標調節長さになるように正確に管理することができない事、　▲３▼そして、楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）とを収縮させるための楔締め付け用管収縮操作装置（図１（Ａ）の符号（１３）に相当するもの）の全長を余分に長くしなければならない事、　と云うこの問題点▲１▼・▲２▼・▲３▼の全てを解消する。　］
【００３１】
大径管（１）と小径管（２）とを、伸縮させて所望の管長さに調節した後に、固定するための手順を次に述べる。
まず、大径管（１）と小径管（２）とを両手で持って、旋回作動形楔（１１）の楔締め付け方向（図１（Ｂ）上では右回転方向）に相対回転させる。すると、旋回作動形楔（１１）が大径管（１）の内周面と旋回形カム面（９）とに摩擦接触しながら、旋回形楔室（１０）の楔締め付け方向（図１（Ｂ）上では左方向）へ圧入されて行って、楔押込み具（７）を旋回形カム面（９）および旋回作動形楔（１１）を介して大径管（１）に楔摩擦固定する。
【００３２】
次に、大径管（１）と小径管（２）とを収縮側へ押込み操作する。すると、楔押込み具（７）で楔（５）が受け止められた状態で、楔ガイド（４）が楔締め付け側（図１（Ｂ）上では右側）へ移動して、楔（５）を大径管（１）へ押し付けて行き、大径管（１）と小径管（２）とを楔（５）および楔ガイド（４）を介して楔摩擦固定するのである。
【００３３】
なお、大径管（１）と小径管（２）との固定を解除するための手順を、次に述べる。　まず、大径管（１）と小径管（２）とを伸長側へ引き出し操作すると、楔（５）が弛んで大径管（１）と小径管（２）との楔摩擦固定が解除される。　次に、大径管（１）と小径管（２）とを旋回作動形楔（１１）の楔弛め方向へ相対回転させると、旋回作動形楔（１１）が弛んで、大径管（１）と旋回形カム面（９）との楔摩擦固定が解除される。　これにより、大径管（１）と小径管（２）とは、楔（５）と旋回作動形楔（１１）との両方で固定解除されて、自由に伸縮させることができる。
【００３４】
以上のように、大径管（１）と小径管（２）とを、所望の長さに伸縮調節した後に、固定して行くときの動作において、大径管（１）に旋回作動形楔（１１）で摩擦固定された楔押込み具（７）で楔（５）が受け止められている状態で、楔（５）が楔ガイド（４）で大径管（１）へ圧し付けられて行く楔締付け作動の過渡期でも、楔（５）と大径管（１）との接触面間で管軸心方向への辷り出しによる位置ずれが生じない。
【００３５】
これにより、図４に示す前述の従来技術の問題点▲１▼・▲２▼および▲３▼の全てを解消することができる。すなわち、この従来技術の問題点：　▲１▼楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）との伸縮調節・固定後の管長さの実長が、伸縮調節時の目標調節長さよりも可成り短くなってしまう事、　▲２▼楔（５）と小径管（２）との辷り出し寸法が特定しないため、上記▲１▼の伸縮調節・固定後の短くなる管長誤差がランダムに現れるので、目標調節長さになるように正確に管理することができない事、　▲３▼そして、楔（５）と小径管（２）とが管軸心方向へ辷り出した寸法分だけ、大径管（１）と小径管（２）とを収縮させるための楔締め付け用管収縮操作装置（図１（Ａ）の符号（１３）に相当するもの）の全長を余分に長くしなければならない事、　と云うこの問題点▲１▼・▲２▼・▲３▼の全てを解消することができたのである。
【００３６】
［　ロ．　楔式固定装置（３）を構成する全ての部品は大径管（１）の外周に突出しないので、他物が大径管（１）の外周を移動するときに楔（５）に衝突して、両管（１）（２）の楔（５）での固定が脱落する事故を無くす事ができる。　］
【００３７】
楔式固定装置（３）を構成するテーパー状楔ガイド（４）・楔（５）・楔押込み具（７）・摺動可能回転伝動手段（８）・旋回形カム面（９）・および旋回作動形楔（１１）の全ての部品は、大径管（１）の管内部に収容されていて、大径管（１）の外周に突出しない。
【００３８】
これにより、他物が大径管（１）の外周を移動するときに楔（５）に直接的または間接的に衝突して、両管（１）（２）の楔（５）での固定が脱落する事故を無くす事ができるのである。
【００３９】
○　発明３．　請求項３．　図１・図２参照．
この発明３は、上記発明１の効果［イ］・［ロ］に加えて、つぎの効果を奏する。
【００４０】
［　ハ．　円錐面螺旋ガイド形カム面（１７）はカム上り傾斜角度が緩やかになっている分だけ、大径管（１）と小径管（２）とを楔締め付け方向に相対回転させる操作力が小さくて済むから、旋回作動形楔（１１）の楔締め付け方向への両管（１）（２）の相対回転操作を軽い力で楽に行える。　］
【００４１】
円錐面螺旋ガイド形カム面（１７）は、カム上り傾斜角度が緩やかになっている分だけ、旋回作動形楔（１１）が大径管（１）に楔押込み具（７）を摩擦固定するに必要な固定力に対して、大径管（１）と小径管（２）とを楔締め付け方向に相対回転させる操作力が小さくて済む。これにより、旋回作動形楔（１１）の楔締め付け方向への相対回転操作を軽い力で楽に行うことができる。
【００４２】
【発明の実施の形態】
以下、本発明の伸縮二重管の伸縮部楔式固定装置の実施の形態を、図面に基づき説明する。
【００４３】
○　実施形態１．　請求項１・２・３．　図１・図２参照．
図１・図２は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態１を示す。図１（Ａ）は伸縮二重管製の突っ張り固定式吊持棒の使用状態の一部切除正面図。図１（Ｂ）は図１（Ａ）のＢ部の縦断正面図、図１（Ｃ）は図１（Ｂ）のＣ−Ｃ線断面図、図１（Ｄ）は図１（Ｂ）のＤ−Ｄ線断面図。　図２は図１（Ａ）のＩＩ部の縦断正面図である。
【００４４】
図１において、符号（２１）は伸縮二重管製の突っ張り固定式吊持棒、符号（２２）（２２）は家屋の室内の左右の側壁である。符号（１）は大径管、（２）は小径管、（３）は楔式固定装置である。（４）はテーパー状の楔ガイド、（５）は楔、（６）は楔室。（７）は楔押込み具、（８）は摺動可能回転伝動手段、（９）は旋回形カム面、（１０）は旋回形楔室、（１１）は旋回作動形楔。（１３）は楔締め付け用管収縮操作装置、（１５）は円錐面、（１６）は螺旋ガイド突条、（１７）は円錐面螺旋ガイド形カム面である。
【００４５】
伸縮二重管の伸縮部楔式固定装置を構成する大径管（１）に小径管（２）を伸縮可能に挿入する。この大径管（１）と小径管（２）とに亙って楔式固定装置（３）を設ける。
この楔式固定装置（３）は小径管（２）と同心状となるテーパー状の楔ガイド（４）と楔（５）とを具える。大径管（１）と小径管（２）とを収縮操作することに基づき、楔（５）が小径管（２）の軸心方向に沿って楔ガイド（４）で楔締め付け側に案内されて、大径管（１）と小径管（２）とを楔摩擦固定するように構成する。
【００４６】
前記楔ガイド（４）の基端部（２３）は小径管（２）の右端部に内嵌固定される。この楔ガイド（４）は大径管（１）内に挿入する。楔（５）は楔ガイド（４）と大径管（１）との間の楔室（６）に挿入する。この楔（５）はテーパー孔円筒体を周方向に４分割したものからなる。
【００４７】
この楔（５）と大径管（１）との間には、ゴム製または合成樹脂製の体圧縮弾性変形可能な断面Ｃ形の筒状摩擦板（２４）を介在させる。この筒状摩擦板（２４）は楔（５）に外嵌させて支持させる。楔（５）は楔戻しバネ（２５）で楔弛め側へ弾圧付勢する。
【００４８】
大径管（１）の内部で、楔（５）を楔締め付け側へ押し込むための楔押込み具（７）は小径管（２）に対して、摺動可能回転伝動手段（８）を介して相対摺動可能で相対回転不能に設ける。この摺動可能回転伝動手段（８）は、楔ガイド（４）から右側へ一体に突出させた角軸（２６）に、楔押込み具（７）に貫通させた角孔（２７）を外嵌させて成る。
【００４９】
楔押込み具（７）の外周面に旋回形カム面（９）を形成する。この旋回形カム面（９）と大径管（１）との間に旋回形楔室（１０）を形成する。この旋回形楔室（９）に旋回作動形楔（１１）を挿入する。
【００５０】
この旋回作動形楔（１１）は、大径管（１）と小径管（２）とを楔締め付け側へ相対回転操作することに基づき、旋回形カム面（９）で楔締め付け側へ押し込まれて行って、大径管（１）に楔押込み具（７）を楔摩擦固定するように構成したものである。
【００５１】
この旋回形カム面（９）は、円錐面（１５）から螺旋ガイド突条（１６）を突設して形成した円錐面螺旋ガイド形カム面（１７）から成る。旋回作動形楔（１１）は、ゴムまたは合成樹脂などの弾性材料で側面Ｃ形に形成して成る。
【００５２】
前記楔（５）を楔締め付け側へ作動させるために、大径管（１）と小径管（２）とを管収縮側に押圧する楔締め付け用管収縮操作装置（１３）を、大径管（１）の右端部に設ける。
【００５３】
この楔締め付け用管収縮操作装置（１３）は、図１および図２に示すように、家屋の室内の右側壁（２２）への着座具（２８）と大径管（１）の右端部との間に介装され、ナット（２９）とボルト（３０）と突っ張り用バネ（３１）とを具える。
【００５４】
このナット（２９）は固定筒（３２）を介して大径管（１）の右端部に固定される。ボルト（３０）は回転操作筒（３３）に対して、ボルト（３０）の六角頭部（３４）と回転操作筒（３３）の六角穴（３５）との六角嵌合により、相対摺動自在で相対回転不能に支持される。
【００５５】
ボルト（３０）はナット（２９）に嵌合される。六角頭部（３４）は、回転操作筒（３３）に固定の六角穴蓋（３６）で六角穴（３５）からの左側への脱落を阻止されるとともに、六角穴（３５）に内装した突っ張り用バネ（３１）で左側へ弾性付勢されている。
【００５６】
これにより、回転操作筒（３３）を左回転させることにより、ボルト（３０）が右側へ駆動されて、突っ張り用バネ（３１）を圧縮しながら、ナット（２９）が左側へ駆動されて、固定筒（３２）・大径管（１）および旋回作動形楔（１１）を介して、楔押込み具（７）を左側へ移動させ、楔（５）を左側へ移動させて、この楔（５）で大径管（１）と楔ガイド（４）とを楔摩擦固定し、大径管（１）と小径管（２）とを楔（５）と楔ガイド（４）を介して固定するように構成したものである。
【００５７】
なお、回転操作筒（３３）を右回転させることにより、上記と逆方向の作動をして、楔（５）が楔戻しバネ（２５）で右側へ押されて緩められ、大径管（１）と小径管（２）との固定が解除される。
【００５８】
○　実施形態２．　請求項１．　図３参照．
この実施形態２は、上記実施形態１の構成において、その一部を次のように変更したものである。
【００５９】
図３は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態２を示す。図２（Ａ）は図１（Ｂ）に相当する要部の縦断正面図。図２（Ｂ）は図２（Ａ）のＢ−Ｂ線断面図である。
【００６０】
前記旋回形カム面（９）は、楔押込み具（７）の外周面の周方向にのみカムリフトが変化する形となる一対の板カム面（４１）（４１）からなる。一対の各旋回形楔室（１０）（１０）および一対の各旋回作動形楔（１１）（１１）は、この各板カム面（４１）（４１）の周方向に沿う形に形成されたものである。
【００６１】
○　実施形態３．　請求項１．　図は省略．
この実施形態３は、上記実施形態１の構成において、その一部を次のように変更したものである。
【００６２】
前記楔（５）は、テーパー孔円筒体を周方向に▲１▼２分割・▲２▼３分割・▲３▼６分割・または▲４▼その他の複数分割にしたものに、変更する。
【００６３】
○　実施形態４．　請求項１．　図は省略．
この実施形態は４、上記実施形態１の構成において、その一部を次のように変更したものである。
【００６４】
前記のゴム製または合成樹脂製の体圧縮弾性変形可能な筒状摩擦板（２４）は、▲１▼断面円筒形に形成したもの、▲２▼断面円筒形を周方向に複数分割したもの、または、▲３▼断面円筒形を周方向に複数分割した複数分割体をその長さ方向の一部同士で連結したもの、に変更する。
【図面の簡単な説明】
【図１】図１・図２は本発明の伸縮二重管の伸縮部楔式固定装置の実施形態１を示す。図１（Ａ）は伸縮二重管製の突っ張り固定式吊持棒の使用状態の一部切除正面図。図１（Ｂ）は図１（Ａ）のＢ部の縦断正面図、図１（Ｃ）は図１（Ｂ）のＣ−Ｃ線断面図、図１（Ｄ）は図１（Ｂ）のＤ−Ｄ線断面図。
【図２】図１（Ａ）のＩＩ部の縦断正面図。
【図３】本発明の伸縮二重管の伸縮部楔式固定装置の実施形態２を示す。　図２（Ａ）は図１（Ｂ）に相当する要部の縦断正面図。図２（Ｂ）は図２（Ａ）のＢ−Ｂ線断面図。
【図４】従来技術の伸縮二重管の伸縮部楔式固定装置を示し、図１（Ｂ）に相当する要部の縦断正面図。
【符号の説明】
１…大径管、　２…小径管、　３…楔式固定装置、　４…テーパー状の楔ガイド、　５…楔、　６…楔室、　７…楔押込み具、　８…摺動可能回転伝動手段、９…旋回形カム面、　１０…旋回形楔室、　１１…旋回作動形楔、　１３…楔締め付け用管収縮操作装置、　１５…円錐面、　１６…螺旋ガイド突条、　１７…円錐面螺旋ガイド形カム面。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a telescopic wedge-type fixing device for a telescopic double tube.
Examples of the use of the telescopic double pipe provided with this telescopic part wedge-type fixing device include, for example, a hanging rod which is stretched between left and right side walls of a building and frictionally fixed, or a frictional bar which is stretched between a floor and a ceiling of a building. There are clothespins to secure.
[0002]
[Premise configuration]
As shown in FIG. 1, FIG. 2, FIG. 3 (the present invention), or FIG. 4 (prior art), the telescopic double wedge-type fixing device of the telescopic double tube of the present invention has the following premise. set to target.
[0003]
1 and 2 show a first embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 1 (A) is a partially cutaway front view in use of a stretch-fixed suspension rod made of a telescopic double tube. 1 (B) is a vertical sectional front view of a portion B in FIG. 1 (A), FIG. 1 (C) is a cross-sectional view taken along line CC of FIG. 1 (B), and FIG. DD sectional drawing. FIG. 2 is a vertical sectional front view of a portion II in FIG.
[0004]
FIG. 3 shows a second embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 2A is a longitudinal sectional front view of a main part corresponding to FIG. FIG. 2B is a cross-sectional view taken along line BB of FIG.
[0005]
FIG. 4 is a vertical sectional front view of a main part corresponding to FIG. 1 (B), showing a conventional expansion / contraction wedge-type fixing device for a telescopic double tube.
[0006]
A small-diameter pipe (2) is inserted into a large-diameter pipe (1) constituting a telescopic part wedge-type fixing device of a telescopic double pipe so as to be able to expand and contract. A wedge-type fixing device (3) is provided over the large-diameter pipe (1) and the small-diameter pipe (2).
[0007]
The wedge-type fixing device (3) includes a tapered wedge guide (4) and a wedge (5) concentric with the small-diameter tube (2). Based on the contraction operation of the large-diameter pipe (1) and the small-diameter pipe (2), the wedge (5) is guided toward the wedge tightening side by the wedge guide (4) along the axial direction of the small-diameter pipe (2). Thus, the large-diameter pipe (1) and the small-diameter pipe (2) are configured to be fixed by wedge friction.
[0008]
[Prior art]
In the above-mentioned premise configuration, as a specific configuration for assembling the wedge guide (4) and the wedge (5), there is the following in the prior art.
○ Conventional technology. See FIG. (Japanese Patent Application Laid-Open No. 9-257016)
FIG. 4 is a vertical sectional front view of a main part corresponding to FIG. 1 (B), showing a conventional expansion / contraction wedge-type fixing device for a telescopic double tube.
[0009]
The wedge guide (4) is externally fitted to the end of the large-diameter pipe (1) and fixed with screws (51). The wedge (5) is inserted into a wedge chamber (52) between the wedge guide (4) and the small diameter pipe (21). The wedge (5) is clamped and fixed between the wedge case (53) and the wedge case lid (54). The wedge case (53) is slidably fitted to the wedge guide (4) and the large-diameter pipe (1).
[0010]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-257016
[Problems to be solved by the invention]
The above prior art has the following problems.
[ I. In the transitional period of the wedge tightening operation of the wedge (5), a displacement occurs between the contact surfaces of the wedge (5) and the small-diameter pipe (2) due to sliding in the axial direction of the pipe. 1), (2) and (3) occur. That is, (1) the length of the large-diameter pipe (1) and the small-diameter pipe (2) after the expansion and contraction adjustment and fixing of the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of the wedge (5) and the small-diameter pipe (2) sliding in the axial direction of the pipe. The actual length of the wedge is considerably shorter than the target adjustment length at the time of expansion and contraction adjustment. (2) Since the sliding dimension between the wedge (5) and the small diameter pipe (2) is not specified, the above (1) Since the length error of the shortened tube after fixation of the telescopic adjustment appears randomly, it cannot be accurately managed to reach the target adjustment length. {Circle around (3)} The wedge (5) and the small-diameter tube (2) A wedge tightening pipe contraction operation device (corresponding to the reference numeral (13) in FIG. 1A) for contracting the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of sliding out in the pipe axis direction. (1), (2), and (3). ]
[0012]
A procedure for fixing the large-diameter pipe (1) and the small-diameter pipe (2) after expanding and contracting them to a desired pipe length will be described below. (Described in paragraph [0013] of the detailed description of the invention in the specification of JP-A-9-257016).
In FIG. 4, first, the wedge case (53) is moved rightward with respect to the large-diameter pipe (1). Then, the wedge (5) is pushed rightward, guided by the wedge guide (4), and slightly contacts the outer peripheral surface of the small diameter pipe (2).
[0013]
Next, the small-diameter pipe (2) is contracted and moved rightward with respect to the large-diameter pipe (1). Then, the wedge (5) slides slightly to the right side with respect to the small-diameter pipe (2), and slides the large-diameter pipe (1) and the small-diameter pipe (2) to the wedge guide (4) and the wedge (4). Via 5), the wedge is frictionally fixed.
[0014]
As described above, when the large-diameter pipe (1) and the small-diameter pipe (2) are expanded and contracted to a desired length and then fixed, the wedge (5) is moved to the wedge guide (4). In the transitional period of the wedge tightening operation in which the wedge (5) is guided and pressed against the small-diameter pipe (2), the wedge (5) and the small-diameter pipe are slightly moved so as to slightly slide with respect to the small-diameter pipe (2). A displacement occurs between the contact surfaces with (2) due to sliding in the tube axis direction.
[0015]
This causes the following problems (1), (2) and (3). That is, the problems are as follows: (1) Adjustment and fixation of expansion and contraction between the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of the wedge (5) and the small-diameter pipe (2) sliding in the axial direction of the pipe. The actual length of the rear pipe length is considerably shorter than the target adjustment length for telescopic adjustment. (2) Since the protruding dimension between the wedge (5) and the small-diameter pipe (2) is not specified, the shortened pipe length error after the expansion and contraction adjustment and fixing of the above (1) appears at random, so that the target adjustment length is obtained. Can not be managed as accurately as possible. {Circle around (3)} Wedge tightening for shrinking the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of the wedge (5) and the small-diameter pipe (2) sliding in the axial direction of the pipe. That is, the overall length of the tube contraction operation device (corresponding to the reference numeral (13) in FIG. 1A) must be extra long.
[0016]
[B. Since the wedge (5) and the wedge case (53) constituting the wedge-type fixing device (3) protrude into the outer peripheral space of the large-diameter pipe (1) and the small-diameter pipe (2), other objects are placed in the large-diameter pipe (1). ) Is moved to the left and collides with the wedge case (53), the wedge (5) is moved to the slack side, and the two tubes (1) and (2) are fixed by the wedge (5). An accident of falling off may occur. ]
[0017]
The tapered wedge guide (4), wedge (5), wedge case (53) and wedge case lid (54) constituting the wedge-type fixing device (3) are provided for the large-diameter pipe (1) and the small-diameter pipe (2). Projects into the outer space. Thus, when another object moves to the left in the outer peripheral space of the large diameter pipe (1) and collides with the wedge case (53), the wedge (5) is moved to the slack side, and the two pipes (1) ( An accident that the fixing of the wedge (5) in 2) falls off may occur.
[0018]
An object of the present invention is to do the following.
[I]. In the transitional period of the wedge tightening operation of the wedge, the position of the contact surface between the wedge and the large-diameter pipe is prevented from being displaced due to sliding in the axial direction of the pipe, thereby causing the problems of the prior art: (1) The actual length of the length of the large and small diameter tubes after expansion and contraction and fixation of the large and small diameter tubes is greater than the target adjustment length at the time of expansion and contraction adjustment by the dimension of the wedge and small diameter tube sliding in the direction of the tube axis. The length of the pipe will be shortened. (2) The length of the protrusion between the wedge and the small-diameter pipe is not specified. (3) and wedge tightening tube shrinkage to shrink the large and small diameter tubes by the size of the wedge and small diameter tube sliding in the axial direction of the tube. This problem that the total length of the operating device must be extra longer {circle around (1)}. 2 ▼ · ▲ 3 ▼ to eliminate all.
[0019]
[B]. By preventing all parts of the wedge-type fixing device from projecting to the outer circumference of the large-diameter pipe, the other parts collide with the wedge when moving on the outer circumference of the large-diameter pipe. Eliminates accidents where fixings fall off.
[C]. The conical spiral guide type cam surface reduces the operating force for relatively rotating the large-diameter pipe and the small-diameter pipe in the wedge tightening direction by making the cam rising inclination angle gentle, and in the wedge tightening direction of the swivel operation type wedge. The relative rotation of the two tubes can be easily performed with a light force.
[0020]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the telescopic double-tube telescopic wedge-type fixing device of the present invention has the following characteristic configuration as shown in FIG. 1, FIG. 2 or FIG. It is characterized by having done.
[0021]
1 and 2 show a first embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 1 (A) is a partially cutaway front view in use of a stretch-fixed suspension rod made of a telescopic double tube. 1 (B) is a vertical sectional front view of a portion B in FIG. 1 (A), FIG. 1 (C) is a cross-sectional view taken along line CC of FIG. 1 (B), and FIG. DD sectional drawing. FIG. 2 is a vertical sectional front view of a portion II in FIG.
[0022]
FIG. 3 shows a second embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. 2A is a longitudinal sectional front view of a main part corresponding to FIG. 1B, and FIG. 2B is a cross-sectional view taken along line BB of FIG. 2A.
[0023]
○ Invention 1. Claim 1. See FIG. 1, FIG. 2, or FIG.
The wedge guide (4) is fixed to the small diameter pipe (2) and inserted into the large diameter pipe (1). The wedge (5) is inserted into a wedge chamber (6) between the wedge guide (4) and the large diameter pipe (1).
Inside the large diameter pipe (1), a wedge pusher (7) for pushing the wedge (5) to the wedge tightening side is slidable with respect to the small diameter pipe (2) via rotary transmission means (8). Provide relative sliding and non-rotatable.
[0024]
A revolving cam surface (9) is formed on the outer peripheral surface of the wedge pusher (7). A revolving wedge chamber (10) is formed between the revolving cam surface (9) and the large diameter pipe (1). The swiveling wedge (11) is inserted into the swiveling wedge chamber (9).
The swiveling wedge (11) is pushed into the wedge tightening side by the swivel cam surface (9) based on the relative rotation operation of the large diameter pipe (1) and the small diameter pipe (2) toward the wedge tightening side. The wedge pushing tool (7) is fixed to the large diameter pipe (1) by friction with the wedge.
[0025]
○ Invention 2. Claim 2. See FIG. 1 and FIG.
The invention 2 is characterized in that the following features are added to the invention 1 described above.
[0026]
In order to operate the wedge (5) to the wedge tightening side, a wedge tightening pipe contraction operating device (13) for pressing the large-diameter pipe (1) and the small-diameter pipe (2) to the pipe contraction side is provided by a large-diameter pipe. (1) and at least one of the small-diameter pipe (2).
[0027]
○ Invention 3. Claim 3. See FIG. 1 and FIG.
The invention 3 is characterized in that the following features are added to the invention 1 or 2.
[0028]
The revolving cam surface (9) comprises a conical spiral guide cam surface (17) formed by projecting a spiral guide ridge (16) from the conical surface (15).
[0029]
【The invention's effect】
The telescopic wedge-type fixing device of the telescopic double pipe according to the present invention has the following effects.
○ Invention 1. Claim 1. See FIG. 1, FIG. 2, or FIG.
[0030]
[ I. In the transitional period of the wedge tightening operation of the wedge (5), there is no displacement between the contact surfaces of the wedge (5) and the large-diameter pipe (1) due to sliding in the axial direction of the pipe. Problems of the prior art as shown below: (1) Adjustment of expansion and contraction between the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of the wedge (5) and the small-diameter pipe (2) sliding in the axial direction of the pipe.・ The actual length of the tube after fixing is considerably shorter than the target adjustment length at the time of expansion and contraction adjustment. (2) Since the sliding dimension between the wedge (5) and the small diameter tube (2) is not specified. Since the shortened pipe length error after the expansion / contraction adjustment in the above (1) appears randomly, it cannot be accurately managed to reach the target adjustment length. (3) And the wedge (5) and the small diameter pipe (2) for wedge tightening to shrink the large-diameter pipe (1) and the small-diameter pipe (2) by the dimension of sliding out in the axial direction of the pipe. All of the problems (1), (2), and (3) that the total length of the tube contraction operation device (corresponding to the reference numeral (13) in FIG. 1A) must be extra long. To eliminate. ]
[0031]
A procedure for fixing the large-diameter pipe (1) and the small-diameter pipe (2) after expanding and contracting them to a desired pipe length will be described below.
First, the large-diameter pipe (1) and the small-diameter pipe (2) are held by both hands and relatively rotated in the wedge tightening direction (the right-hand rotation direction in FIG. 1 (B)) of the swiveling wedge (11). Then, while the swiveling wedge (11) is in frictional contact with the inner peripheral surface of the large diameter pipe (1) and the swiveling cam surface (9), the wedge tightening direction of the swiveling wedge chamber (10) (FIG. B) On the left side), the wedge pushing tool (7) is frictionally fixed to the large-diameter pipe (1) via the revolving cam surface (9) and the revolving wedge (11). .
[0032]
Next, the large-diameter pipe (1) and the small-diameter pipe (2) are pushed toward the contraction side. Then, while the wedge (5) is received by the wedge pushing tool (7), the wedge guide (4) moves to the wedge tightening side (the right side in FIG. 1 (B)), and the wedge (5) is enlarged. The large-diameter pipe (1) and the small-diameter pipe (2) are pressed against the diameter pipe (1) and frictionally fixed with the wedge via the wedge (5) and the wedge guide (4).
[0033]
The procedure for releasing the fixation of the large-diameter pipe (1) and the small-diameter pipe (2) will be described below. First, when the large-diameter pipe (1) and the small-diameter pipe (2) are pulled out to the extension side, the wedge (5) is loosened, and the wedge friction fixing between the large-diameter pipe (1) and the small-diameter pipe (2) is released. You. Next, when the large-diameter pipe (1) and the small-diameter pipe (2) are relatively rotated in the wedge loosening direction of the pivoting wedge (11), the pivoting wedge (11) is loosened, and the large-diameter pipe ( The wedge friction fixing between 1) and the revolving cam surface (9) is released. Thus, the large-diameter pipe (1) and the small-diameter pipe (2) are unlocked by both the wedge (5) and the swiveling wedge (11), and can be freely expanded and contracted.
[0034]
As described above, in the operation when the large-diameter pipe (1) and the small-diameter pipe (2) are expanded and contracted to a desired length and then fixed, the swiveling wedge is attached to the large-diameter pipe (1). While the wedge (5) is received by the wedge pushing tool (7) frictionally fixed in (11), the wedge (5) is pressed against the large diameter pipe (1) by the wedge guide (4). Even in the transitional period of the wedge tightening operation, no displacement occurs due to sliding in the axial direction of the pipe between the contact surfaces of the wedge (5) and the large-diameter pipe (1).
[0035]
As a result, all of the above-mentioned problems (1), (2) and (3) of the prior art shown in FIG. 4 can be solved. That is, the problems of this prior art: (1) The large-diameter pipe (1) and the small-diameter pipe (2) are separated by the dimension of the wedge (5) and the small-diameter pipe (2) sliding in the axial direction of the pipe. The actual length of the tube length after expansion / contraction adjustment / fixation is considerably shorter than the target adjustment length during expansion / contraction adjustment. (2) The sliding dimension between the wedge (5) and the small diameter tube (2) is specified. Since the pipe length error after shortening after expansion / contraction adjustment / fixing in (1) appears randomly, it cannot be accurately managed to reach the target adjustment length. (3) and wedge (5) And a small-diameter pipe (2) sliding in the axial direction of the pipe by an amount corresponding to the dimension of the large-diameter pipe (1) and the small-diameter pipe (2) to contract the wedge-tightening pipe contraction operation device (FIG. 1A (1) and (2) that the total length of () (corresponding to the code (13)) must be extra long.・ I was able to eliminate all of the items in (3).
[0036]
[B. Since all parts constituting the wedge-type fixing device (3) do not protrude to the outer periphery of the large-diameter pipe (1), when other objects move on the outer periphery of the large-diameter pipe (1), they collide with the wedge (5). Thus, it is possible to eliminate an accident that the fixing of the two pipes (1) and (2) with the wedge (5) falls off. ]
[0037]
Tapered wedge guide (4), wedge (5), wedge pusher (7), slidable rotary transmission means (8), swivel cam surface (9), and swivel constituting wedge-type fixing device (3) All parts of the working wedge (11) are housed inside the large-diameter pipe (1) and do not protrude to the outer periphery of the large-diameter pipe (1).
[0038]
As a result, when another object moves on the outer periphery of the large-diameter pipe (1), it directly or indirectly collides with the wedge (5), and the two pipes (1) and (2) are fixed by the wedge (5). It is possible to eliminate the accident of falling off.
[0039]
○ Invention 3. Claim 3. See FIG. 1 and FIG.
The third aspect of the invention has the following effect in addition to the effects [1] and [2] of the first aspect.
[0040]
[C. The operation force for relatively rotating the large-diameter pipe (1) and the small-diameter pipe (2) in the wedge tightening direction is small because the conical spiral guide type cam surface (17) has a gentle cam rising inclination angle. As a result, the relative rotation of the two pipes (1) and (2) in the wedge tightening direction of the swiveling operation wedge (11) can be easily performed with a small force. ]
[0041]
In the conical surface spiral guide type cam surface (17), the turning operation type wedge (11) frictionally fixes the wedge pushing tool (7) to the large diameter pipe (1) as much as the cam rising inclination angle is gentle. Operating force for relatively rotating the large-diameter pipe (1) and the small-diameter pipe (2) in the wedge tightening direction with respect to the fixing force required for the above. This makes it possible to easily perform the relative rotation operation of the turning operation type wedge (11) in the wedge tightening direction with a small force.
[0042]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a wrinkle-type fixing device for a telescopic double tube according to the present invention will be described with reference to the drawings.
[0043]
○ Embodiment 1 Claims 1, 2, 3. See FIG. 1 and FIG.
1 and 2 show a first embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 1 (A) is a partially cutaway front view in use of a stretch-fixed suspension rod made of a telescopic double tube. 1 (B) is a vertical sectional front view of a portion B in FIG. 1 (A), FIG. 1 (C) is a cross-sectional view taken along line CC of FIG. 1 (B), and FIG. DD sectional drawing. FIG. 2 is a vertical sectional front view of a portion II in FIG.
[0044]
In FIG. 1, reference numeral (21) denotes a stretch-fixed suspension rod made of a telescopic double tube, and reference numerals (22) and (22) denote left and right side walls in a room of a house. Reference numeral (1) denotes a large-diameter pipe, (2) denotes a small-diameter pipe, and (3) denotes a wedge-type fixing device. (4) is a tapered wedge guide, (5) is a wedge, and (6) is a wedge chamber. (7) is a wedge pushing tool, (8) is a slidable rotary transmission means, (9) is a revolving cam surface, (10) is a revolving wedge chamber, and (11) is a revolving wedge. (13) is a wedge tightening tube contraction operating device, (15) is a conical surface, (16) is a spiral guide ridge, and (17) is a conical spiral guide cam surface.
[0045]
A small-diameter pipe (2) is inserted into a large-diameter pipe (1) constituting a telescopic part wedge-type fixing device of a telescopic double pipe so as to be able to expand and contract. A wedge-type fixing device (3) is provided over the large-diameter pipe (1) and the small-diameter pipe (2).
The wedge-type fixing device (3) includes a tapered wedge guide (4) and a wedge (5) concentric with the small-diameter tube (2). Based on the contraction operation of the large-diameter pipe (1) and the small-diameter pipe (2), the wedge (5) is guided toward the wedge tightening side by the wedge guide (4) along the axial direction of the small-diameter pipe (2). Thus, the large-diameter pipe (1) and the small-diameter pipe (2) are configured to be fixed by wedge friction.
[0046]
The base end (23) of the wedge guide (4) is internally fitted and fixed to the right end of the small diameter pipe (2). This wedge guide (4) is inserted into the large diameter pipe (1). The wedge (5) is inserted into a wedge chamber (6) between the wedge guide (4) and the large diameter pipe (1). The wedge (5) is formed by dividing a tapered cylindrical body into four parts in the circumferential direction.
[0047]
Between the wedge (5) and the large-diameter pipe (1), a cylindrical friction plate (24) made of rubber or synthetic resin and capable of compressing and elastically deforming the body is provided. The cylindrical friction plate (24) is externally fitted to and supported by the wedge (5). The wedge (5) is elastically urged toward the wedge loosening side by a wedge return spring (25).
[0048]
Inside the large diameter pipe (1), a wedge pusher (7) for pushing the wedge (5) to the wedge tightening side is slidable with respect to the small diameter pipe (2) via rotary transmission means (8). Provide relative sliding and non-rotatable. The slidable rotation transmission means (8) has a square shaft (26) projecting rightward from the wedge guide (4) integrally fitted with a square hole (27) penetrated by a wedge pusher (7). Let it be.
[0049]
A revolving cam surface (9) is formed on the outer peripheral surface of the wedge pusher (7). A revolving wedge chamber (10) is formed between the revolving cam surface (9) and the large diameter pipe (1). The swiveling wedge (11) is inserted into the swiveling wedge chamber (9).
[0050]
The swivel wedge (11) is pushed into the wedge tightening side by the swivel cam surface (9) based on the relative rotation of the large diameter pipe (1) and the small diameter pipe (2) to the wedge tightening side. The wedge pushing tool (7) is fixed to the large diameter pipe (1) by friction with the wedge.
[0051]
The revolving cam surface (9) comprises a conical spiral guide cam surface (17) formed by projecting a spiral guide ridge (16) from the conical surface (15). The pivoting wedge (11) is formed in a side surface C shape with an elastic material such as rubber or synthetic resin.
[0052]
In order to operate the wedge (5) to the wedge tightening side, the wedge tightening pipe contraction operating device (13) for pressing the large-diameter pipe (1) and the small-diameter pipe (2) toward the pipe contraction side is provided by a large-diameter pipe. Provided at the right end of (1).
[0053]
As shown in FIGS. 1 and 2, the wedge tightening pipe contraction operating device (13) includes a seating tool (28) for a right side wall (22) in a room of a house and a right end of a large diameter pipe (1). And a nut (29), a bolt (30), and a tension spring (31).
[0054]
The nut (29) is fixed to the right end of the large-diameter pipe (1) via a fixed cylinder (32). The bolt (30) is relatively slidable with respect to the rotary operation cylinder (33) by a hexagonal fit between a hexagonal head (34) of the bolt (30) and a hexagonal hole (35) of the rotary operation cylinder (33). And are supported so that they cannot rotate relative to each other.
[0055]
The bolt (30) is fitted to the nut (29). The hexagonal head (34) is prevented from falling off to the left from the hexagonal hole (35) by a hexagonal hole cover (36) fixed to the rotary operation cylinder (33), and a strut provided inside the hexagonal hole (35). The spring (31) is elastically urged to the left.
[0056]
Thus, by rotating the rotary operation cylinder (33) to the left, the bolt (30) is driven to the right, and the nut (29) is driven to the left while the compression spring (31) is compressed, and fixed. The wedge pusher (7) is moved to the left and the wedge (5) is moved to the left via the cylinder (32), the large-diameter pipe (1) and the swiveling wedge (11). ), The large-diameter pipe (1) and the wedge guide (4) are fixed by wedge friction, and the large-diameter pipe (1) and the small-diameter pipe (2) are fixed via the wedge (5) and the wedge guide (4). It is configured as follows.
[0057]
The wedge (5) is pushed in the right direction by the wedge return spring (25) to be loosened by rotating the rotary operation cylinder (33) clockwise to operate in the opposite direction. ) And the small diameter pipe (2) are released.
[0058]
○ Embodiment 2 Claim 1. See FIG.
In the second embodiment, a part of the configuration of the first embodiment is changed as follows.
[0059]
FIG. 3 shows a second embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 2A is a longitudinal sectional front view of a main part corresponding to FIG. FIG. 2B is a cross-sectional view taken along line BB of FIG.
[0060]
The revolving cam surface (9) comprises a pair of plate cam surfaces (41) (41) whose cam lift changes only in the circumferential direction of the outer peripheral surface of the wedge pusher (7). The pair of pivoting wedge chambers (10) and (10) and the pair of pivoting wedges (11) and (11) are formed along the circumferential direction of the plate cam surfaces (41) and (41). Things.
[0061]
○ Embodiment 3 Claim 1. Illustration is omitted.
In the third embodiment, a part of the configuration of the first embodiment is changed as follows.
[0062]
The wedge (5) is changed so that the tapered hole cylindrical body is divided into (1) two divisions, (2) three divisions, (3) six divisions, or (4) other plural divisions in the circumferential direction.
[0063]
○ Embodiment 4 Claim 1. Illustration is omitted.
In this embodiment, a part of the configuration of the fourth embodiment is changed as follows.
[0064]
The rubber or synthetic resin-made body frictionally deformable cylindrical friction plate (24) is (1) formed in a cylindrical shape in section, (2) is obtained by dividing the cylindrical shape in section into a plurality in the circumferential direction, Alternatively, (3) a plurality of divided bodies obtained by dividing a cylindrical shape into a plurality of pieces in the circumferential direction are connected to each other by a part thereof in the length direction.
[Brief description of the drawings]
FIGS. 1 and 2 show a first embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 1 (A) is a partially cutaway front view in use of a stretch-fixed suspension rod made of a telescopic double tube. 1 (B) is a vertical sectional front view of a portion B in FIG. 1 (A), FIG. 1 (C) is a cross-sectional view taken along line CC of FIG. 1 (B), and FIG. DD sectional drawing.
FIG. 2 is a vertical sectional front view of a portion II in FIG. 1 (A).
FIG. 3 shows a second embodiment of a wedge-type fixing device for a telescopic double tube according to the present invention. FIG. 2A is a longitudinal sectional front view of a main part corresponding to FIG. FIG. 2B is a cross-sectional view taken along the line BB of FIG.
FIG. 4 is a vertical sectional front view of a main part corresponding to FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Large diameter pipe, 2 ... Small diameter pipe, 3 ... Wedge type fixing device, 4 ... Tapered wedge guide, 5 ... Wedge, 6 ... Wedge chamber, 7 ... Wedge pushing tool, 8 ... Slidable rotation transmission means, 9: Revolving cam surface, 10: Revolving wedge chamber, 11: Revolving operation wedge, 13: Wedge tightening tube shrinkage operating device, 15: Conical surface, 16: Spiral guide ridge, 17: Conical surface spiral guide type Cam surface.

Claims

A small-diameter pipe (2) is inserted into a large-diameter pipe (1) that constitutes an expansion / contraction wedge-type fixing device of the telescopic double pipe so as to extend and contract, and extends over the large-diameter pipe (1) and the small-diameter pipe (2). To provide a wedge-type fixing device (3),
The wedge-type fixing device (3) includes a tapered wedge guide (4) and a wedge (5) concentric with the small-diameter pipe (2), and connects the large-diameter pipe (1) and the small-diameter pipe (2). Based on the contraction operation, the wedge (5) is guided to the wedge tightening side by the wedge guide (4) along the axial direction of the small diameter pipe (2), and the large diameter pipe (1) and the small diameter pipe (2). And wedge friction fixed,
In the telescopic wedge-type fixing device of the telescopic double pipe configured as described above,
The wedge guide (4) is fixed to the small diameter pipe (2) and inserted into the large diameter pipe (1), and the wedge (5) is a wedge between the wedge guide (4) and the large diameter pipe (1). Into room (6)
Inside the large diameter pipe (1), a wedge pusher (7) for pushing the wedge (5) to the wedge tightening side is slidable with respect to the small diameter pipe (2) via rotary transmission means (8). Provided to be relatively slidable and relatively unrotatable,
A revolving cam surface (9) is formed on the outer peripheral surface of the wedge pushing tool (7), and a revolving wedge chamber (10) is formed between the revolving cam surface (9) and the large diameter pipe (1). A swiveling wedge (11) is inserted into the swiveling wedge chamber (9),
The swiveling wedge (11) is pushed into the wedge tightening side by the swivel cam surface (9) based on the relative rotation operation of the large diameter pipe (1) and the small diameter pipe (2) toward the wedge tightening side. The wedge pushing tool (7) is fixed to the large-diameter pipe (1) by wedge friction.
A telescopic wedge-type fixing device for a telescopic double pipe.

The telescopic wedge-type fixing device of the telescopic double pipe according to claim 1,
In order to operate the wedge (5) to the wedge tightening side, a wedge tightening pipe contraction operating device (13) for pressing the large-diameter pipe (1) and the small-diameter pipe (2) to the pipe contraction side is provided by a large-diameter pipe. (1) provided on at least one of the small-diameter pipe (2).

The telescopic wedge-type fixing device for a telescopic double tube according to claim 1 or 2,
The revolving cam surface (9) comprises a conical spiral guide type cam surface (17) formed by projecting a spiral guide ridge (16) from the conical surface (15).