JP4446557B2

JP4446557B2 - Tube desorption device

Info

Publication number: JP4446557B2
Application number: JP2000137027A
Authority: JP
Inventors: 幸司青山
Original assignee: CITY OF NAGOYA; Taisei Kiko Co Ltd
Current assignee: CITY OF NAGOYA; Taisei Kiko Co Ltd
Priority date: 2000-05-10
Filing date: 2000-05-10
Publication date: 2010-04-07
Anticipated expiration: 2020-05-10
Also published as: JP2001317659A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、嵌合接続された水道管やガス管等の流体輸送管同士を管軸芯方向に沿って引抜き分離（解体）したり、或いは、流体輸送管同士を管軸芯方向から嵌合接続する場合に用いられる管脱着装置に関する。
【０００２】
【従来の技術】
近年、流体輸送管の配管系に、地震や不同沈下等に起因する管軸芯方向の引抜き力（引張力）が作用したとき、その配管系中の受口管部とこれに挿入接続された挿入管部とが引抜き力で離脱することを阻止するための離脱防止機能を高めた耐震用の管継手構造が多く採用されている。
【０００３】
この耐震用の管継手構造としては、例えば、図８に示すように、受口管部１の内周面に形成された二つの環状溝１ａ，１ｂのうち、受口側に位置する第１環状溝１ａ内に、挿入管部２の外周面との間を密封可能な弾性シール材３を装着するとともに、奥側に位置する第２環状溝１ｂ内には、拡径側に弾性変形可能なロックリング４を装着し、更に、挿入管部２の外周面側の先端部には、両管部１，２が引抜き力によって相対離脱移動したとき、ロックリング４に対して管軸芯Ｘ方向から接当してそれ以上の離脱移動を阻止するための環状突起２ａを突出形成し、この環状突起２ａには、両管部１，２を嵌合接続するとき、弾性シール材３及びロックリング４を拡径側に弾性変形させる環状のカム面２ｂを形成したものが用いられている。
【０００４】
そのため、耐震用の管継手構造においては、受口管部１と挿入管部２とを接続する場合には、両管部１，２を管軸芯Ｘに沿って相対近接移動させればよいが、接続された受口管部１と挿入管部２とを解体する場合では、挿入管部２の外周面と弾性シール材３の内周面との間、及び、挿入管部２の外周面とロックリング４の内周面との間に、弾性シール材３及びロックリング４を挿入管部２の先端側の環状突起２ａよりも管径方向外方に弾性変形させる複数本の帯板状の解体矢を打ち込む必要があるため、解体時の方が困難を要することになる。
【０００５】
そこで、従来の管脱着装置では、図１２、図１３に示すように、受口管部１に管軸芯Ｘ方向から挿入接続される挿入管部２に対して、管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌装着される第１装着体Ａと、前記受口管部１に対して管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌装着される第２装着体Ｂとを設けるとともに、前記第１装着体Ａの管軸芯Ｘを挟んで管径方向で相対向する二個所に形成した受け部５２と、第２装着体Ｂの管軸芯Ｘを挟んで管径方向で相対向する二個所に形成した受け部５４とのうち、管軸芯Ｘ方向で相対向する受け部５２，５４に亘って、前記両装着体Ａ，Ｂに管引抜き方向又は管接続方向の移動力を付与する管強制移動機構Ｃを脱着自在に架設していた。
【０００６】
前記第１装着体Ａは、挿入管部２に対して管径方向から外套装着可能な半円環状に形成され、その半円環方向の両端部で、かつ、円周方向に約２２０度離れた部位の各々には、挿入管部２の外周面に対して管径方向から圧接される押圧片５０を相対回転自在に備えた押えボルト５１が螺合されているとともに、各押えボルト５１の螺合位置よりも半円環方向の中央側に少し偏位した部位の各々には、前記受け部５２を構成するＴの字状の第１係合突起が形成されている。
【０００７】
前記第２装着体Ｂは、受口管部１に対して管径方向から装着可能な半円環状に形成され、それの内側面における半円環方向の両端部側で、かつ、受口管部１の開口端部１Ａの軸芯方向幅よりも管軸芯Ｘ方向に大なる間隔を隔てた部位には、前記開口端部１Ａに対して管軸芯Ｘ方向から接当可能な同一形状の係止突起５３が一体形成されているとともに、第２装着体Ｂの外側面における半円環方向の両端部には、前記受け部５４を構成するＴの字状の第２係合突起がそれぞれ形成されている。
【０００８】
そして、前記第１装着体Ａは、二本の押えボルト５１による締付け固定側への螺合操作により、挿入管部２に対して管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌装着されているとともに、前記第２装着体Ｂは、受口管部１の開口端部１Ａに接当する係止突起５３により、受口管部１に対して管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌装着されている。
【０００９】
前記管移動操作機構Ｃは、多数の係合孔５５を管軸芯Ｘ方向に沿って所定ピッチで貫通形成してあるラック５６と、該ラック５６を往復移動自在に貫通保持し、かつ、ラック５６の係合孔５５に噛み合うピニオン（図示せず）を内装してあるギヤケース５８とを主要構成として備え、かつ、前記ラック５６の一端部には、第１装着体Ａの第１係合突起５２に対して上方から着脱自在に落とし込み状態で嵌合する第１係合溝５９ａを備えた連結部材５９を、管径方向の一定範囲内で移動自在に取付けるとともに、前記ギヤケース５８には、第２装着体Ｂの第２係合突起５４に対して上方から着脱自在に落とし込み状態で嵌合する第２係合溝６０ａを備えた連結部６０を一体形成して構成されている。
【００１０】
また、前記ピニオンに一体形成された操作軸６１のうち、ギヤケース５８から外方に突出する軸端部には、ラチェットレンチ等の工具（人為操作具）で操作可能な六角筒状の操作部６２が外嵌固定されている。
【００１１】
そして、接続されている受口管部１と挿入管部２とを引抜いて分離（解体）する場合には、挿入管部２に第１装着体Ａを外嵌固定するとともに、受口管部１の開口端部１Ａに第２装着体Ｂを外嵌装着したのち、前記ギヤケース５８に対するラック５６の管軸芯Ｘ方向での突出長さ、及び、ラック５６に対する連結部材５９の管径方向での突出長さをそれぞれ調整して、第１装着体Ａの第１係合突起５２及び第２装着体Ｂの第２係合突起５４に、管移動操作機構Ｃを構成する連結部材５９の第１係合溝５９ａ及びギヤケース５８側の第２係合溝６０ａを嵌合保持させる。この状態でギヤケース５８の操作部６２を回転操作して、第１装着体Ａと第２装着体Ｂとに管引抜き方向の移動力を付与し、受口管部１と挿入管部２とを相対離間移動させて接続を解除する。
【００１２】
【発明が解決しようとする課題】
従来の管脱着装置では、接続された両管部１，２の引抜き抵抗又は接続される両管部１，２の接続抵抗に抗して、挿入管部２に装着された第１装着体Ａを所定位置に確実に固定保持するためには、第１装着体Ａの両端部に螺合された各押えボルト５１を強力に締付け操作する必要があり、第１装着体Ａの外嵌固定に多大の労力を要していた。しかも、前記各押えボルト５１を各別に締付け操作するため、各押えボルト５１の締込み操作量のバラ付きによって、受口管部１の管軸芯に対して挿入管部２の管軸芯が傾斜し、その結果、図８に示すような耐震用の管継手構造での解体時においては、挿入管部２の先端側の環状突起２ａが、ロックリング４や弾性シール材３或いは受口管部１の内周面等に引っ掛かるなど、両管部１，２間でこじれが発生するため、両管部１，２の引抜き操作力が異常に増大するばかりでなく、ロックリング４等の破損を招来する不都合がある。
【００１３】
本発明は、上述の実状に鑑みて為されたものであって、その主たる課題は、前記管強制移動機構によって両装着体に付与される管引抜き方向又は管接続方向の移動力を利用して、挿入管部に装着された第１装着体を確実、強力に固定保持することができ、しかも、受口管部の管軸芯に対して挿入管部の管軸芯が傾斜している状態でも、それを同芯又はほぼ同芯状態に極力修正して、部品の変形破損を抑制しながら、両管部の分離又は接続に要する操作力の軽減化を図ることのできる管脱着装置を提供する点にある。
【００１４】
【課題を解決するための手段】
本発明の請求項１による管脱着装置の特徴構成は、受口管部に管軸芯方向から挿入接続される挿入管部に対して管軸芯方向での移動を規制した状態で脱着自在に外嵌装着される第１装着体と、前記受口管部の管軸芯方向における複数の部位に対して管軸芯方向での移動を規制した状態で脱着自在に外嵌装着される第２装着体とが備えられているとともに、前記第１装着体と第２装着体との間に亘って、両装着体に管引抜き方向又は管接続方向の移動力を付与する管強制移動機構が架設され、更に、前記第１装着体には、管強制移動機構の移動力付与作動に連動して挿入管部の外周面の周方向複数箇所を管径方向外方側から挾持する挾持機構が設けられ、前記第２装着体には、受口管部の端部とそれから管軸芯方向に離間した部位との二箇所に対して、該受口管部の管軸芯と同芯又はほぼ同芯状態で脱着自在に外装固定される第１ホルダーと第２ホルダーとが備えられている構成で、
前記第１ホルダーのうち、受口管部の管軸芯を挟んで管径方向で相対向する二個所には、管強制移動機構を脱着自在に両持ち保持するための一方の第１受け部が配設されているとともに、前記第２ホルダーのうち、受口管部の管軸芯を挟んで管径方向で相対向する二個所には、管強制移動機構を脱着自在に両持ち保持するための他方の第２受け部が配設されている点にある。
【００１５】
上記特徴構成によれば、挿入管部に外嵌装着される第１装着体と受口管部に外嵌装着される第２装着体とに亘って管強制移動機構を架設して、該管強制移動機構で両装着体に管引抜き方向又は管接続方向の移動力を付与する際、管強制移動機構の移動力付与作動に連動して、第１装着体に設けられた挾持機構が、挿入管部の外周面の周方向複数箇所を管径方向外方側から挾持することにより、例え、受口管部の管軸芯に対して挿入管部の管軸芯が傾斜している場合でも、挾持機構の挟持動作に連れて、受口管部の管軸芯から最も離れる挿入管部の管壁部分が押圧され、受口管部の管軸芯と挿入管部の管軸芯とが合致する方向に修正される。
【００１６】
しかも、前記第２装着体が、受口管部の管軸芯方向における複数の部位に対して管軸芯方向での移動を規制した状態で脱着自在に外嵌装着されるように構成されているから、接続された両管部の引抜き抵抗又は接続される両管部の接続抵抗に抗して、受口管部に外嵌装着された第２装着体を所定位置に外嵌保持することができるとともに、第２装着体を受口管部の管軸芯と同芯又はほぼ同芯状態で容易に取付けることができる。
【００１７】
更に、管強制移動機構の移動力付与作動を利用して挾持機構を挟持作動させるが故に、接続された両管部の引抜き抵抗又は接続される両管部の接続抵抗に抗して、挿入管部に外嵌装着された第１装着体を所定位置に確実、強力に固定保持することができるとともに、前記挟持機構を駆動するための特別な駆動源も不要となる。
【００１８】
従って、前記管強制移動機構によって両装着体に付与される管引抜き方向又は管接続方向の移動力を利用して、構造の簡素化、製造コストの低廉化とを図りながら、挿入管部に装着された第１装着体を確実、強力に固定保持することができ、しかも、例え、受口管部の管軸芯に対して挿入管部の管軸芯が傾斜している状態でも、それら両管部を同芯又はほぼ同芯状態に極力修正することができることと、受口管部に対する第２装着体の外嵌装着精度の向上によって、挟持機構による自動芯合わせ機能を高めることができることとの相乗作用により、部品の変形破損を抑制しながら、両管部の分離又は接続に要する操作力の軽減化を図ることができる。
【００２０】
また、上記特徴構成によれば、第２装着体を構成する第１ホルダーと第２ホルダーとを、受口管部の管軸芯方向に間隔を隔てた二箇所に外装固定することにより、接続された両管部の引抜き抵抗又は接続される両管部の接続抵抗に抗して、受口管部に外嵌装着された第２装着体を所定位置に外嵌保持することができるとともに、第２装着体を受口管部の管軸芯と同芯又はほぼ同芯状態で容易に取付けることができる。
【００２１】
従って、受口管部に装着された第２装着体を確実、強力に外嵌保持することができるばかりでなく、受口管部に対する第２装着体の外嵌装着精度の向上によって、挟持機構による自動芯合わせ機能を高めることができるから、部品の変形破損の抑制と、両管部の分離又は接続に要する操作力の軽減化を促進することができる。しかも、受口管部の端部を利用して第２装着体の管軸芯方向での相対移動を簡単な構造で確実に規制することができる。
【００２３】
さらに、上記特徴構成によれば、第１ホルダーの両第１受け部及び第２ホルダーの両第２受け部が共に、受口管部の管軸芯を挟んで管径方向で相対向する部位に配設されているから、第１ホルダーの両第１受け部と第２ホルダーの両第２受け部とに亘って管強制移動機構を両持ち保持させたとき、該管強制移動機構を受口管部の管軸芯と平行又はほぼ平行に取付けることができる。
【００２４】
従って、前記管強制移動機構によって両装着体に付与される移動力の付与方向が管軸芯方向となるから、両管部の引抜き時又は接続時におけるこじれが少なくなり、両管部の分離又は接続に要する操作力の軽減化を一層促進することができる。
【００２５】
本発明の請求項２による管脱着装置の特徴構成は、前記第１ホルダーと第２ホルダーとが、管軸芯方向での取付け間隔を複数に変更可能な状態で固定連結されている点にある。
【００２６】
上記特徴構成によれば、第２装着体を構成する第１ホルダーと第２ホルダーとを、受口管部の管軸芯方向に間隔を隔てた二箇所に外装固定して、受口管部に外嵌装着された第２装着体を所定位置に確実、強力に外嵌保持することができるようにしながらも、第１ホルダーと第２ホルダーとを一部品として取り扱うことができる。それでいて、第１ホルダーと第２ホルダーとの管軸芯方向での取付け間隔を、両管部の接合長さや受口管部の形状等に応じて適切な間隔に変更することができる。
【００２７】
従って、形状等の異なる複数種類の受口管部に対して第２装着体を確実、強力にかつ能率良く容易に装着することができる。
【００２８】
本発明の請求項３による管脱着装置の特徴構成は、前記第１装着体が、挿入管部の外周面に沿って周方向で複数に分割され、かつ、挿入管部に外套させた状態で締結具を介して脱着自在に締付け固定される複数の分割ホルダーから構成されているとともに、前記分割ホルダーの連結フランジ部間に、前記挾持機構を構成する挾持部材が揺動自在に保持されている点にある。
【００２９】
上記特徴構成によれば、挿入管部に対して外套状態で締付け固定される分割ホルダーの連結フランジ部を利用して、その連結フランジ部間に、前記挾持機構を構成する挾持部材を揺動自在に保持させることにより、挾持部材を揺動自在に保持するための取付け部材点数の削減を図ることができる。
【００３０】
本発明の請求項４による管脱着装置の特徴構成は、前記第１ホルダーに、受口管部の端部に対して同芯又はほぼ同芯状態で管軸芯方向から脱着自在に嵌合する嵌合部が形成されている点にある。
【００３１】
上記特徴構成によれば、第１ホルダーに形成された嵌合部を、受口管部の端部に対して同芯又はほぼ同芯状態で管軸芯方向から嵌合させることにより、第１ホルダーの管径方向での位置ずれを接当規制することができるとともに、解体時における大きな反力を確実に受止めることができる。
【００３２】
従って、受口管部に対する第２装着体の外嵌装着精度の向上によって、挟持機構による自動芯合わせ機能を高めることができるから、両管部の分離又は接続に要する操作力の軽減化を促進することができる。
【００３３】
本発明の請求項５による管脱着装置の特徴構成は、前記挾持機構を構成する複数の挾持部材の挾持作用部に、挿入管部の外周面に喰込み可能な複数の突起が形成されている点にある。
【００３４】
上記特徴構成によれば、挿入管部に外嵌装着される第１装着体と受口管部に外嵌装着される第２装着体とに亘って管強制移動機構を架設して、該管強制移動機構で両装着体に管引抜き方向又は管接続方向の移動力を付与する際、管強制移動機構の移動力付与作動に連動して、第１装着体に設けられた挾持機構の複数の挾持部材が、挿入管部の外周面の周方向複数箇所を管径方向外方側から挾持するとともに、各挾持部材の挾持作用部に形成された複数の突起が挿入管部の外周面に喰込む。
【００３５】
従って、前記管強制移動機構によって両装着体に付与される管引抜き方向又は管接続方向の移動力を利用して、挟持機構を挾持作動させることにより、構造の簡素化、製造コストの低廉化とを図りながら、挟持機構による挟持作用及び喰込み作用によって、挿入管部に装着された第１装着体をより確実、強力に固定保持することができる。
【００３６】
本発明の請求項６による管脱着装置の特徴構成は、前記管強制移動機構に、第１ホルダーの両受け部と第２ホルダーの両受け部とのうち、管軸芯方向で相対向する両受け部に亘ってそれぞれ脱着自在に架設される流体圧シリンダが備えられている点にある。
【００３７】
上記特徴構成によれば、第１ホルダーの両第１受け部と第２ホルダーの両第２受け部とに亘って、管強制移動機構を構成する流体圧シリンダを架設するだけでよいから、管強制移動機構の組付けの容易化を図ることができる。
【００３８】
【発明の実施の形態】
〔第１実施形態〕
図１〜図８は、鋳鉄管、鋼管又は塩化ビニル管等を用いて構成される水道管やガス管等の流体輸送管Ｐの受口管部１に対して、他の流体輸送管Ｐの挿入管部２を管軸芯Ｘ方向に沿って密封状態で挿入接続してある管継手構造に用いられる管脱着装置の一例で、接続されている受口管部１と挿入管部２とを管軸芯Ｘ方向に沿って引抜き分離（解体）する場合に用いられる継手解体器を示し、前記挿入管部２に対して管軸芯Ｘ方向での移動を規制した状態で管径方向外方から脱着自在に外嵌装着される第１装着体Ａと、前記受口管部１の管軸芯Ｘ方向における複数の部位に対して管軸芯Ｘ方向での移動を規制した状態で管径方向外方側から脱着自在に外嵌装着される第２装着体Ｂとが備えられているとともに、前記第１装着体Ａと第２装着体Ｂとの間に亘って、両装着体Ａ，Ｂに管引抜き方向の移動力を付与する管強制移動機構Ｃが架設され、更に、前記第１装着体Ａには、管強制移動機構Ｃの移動力付与作動に連動して挿入管部２の外周面の周方向複数箇所を管径方向外方側から挾持する挾持機構Ｄが設けられている。
【００３９】
前記受口管部１と挿入管部２との管継手構造としては、図８に示すような耐震性の屈曲許容型管継手構造と、図３に示すような耐震性の屈曲防止型管継手構造などが存在する。
耐震性の屈曲許容型管継手構造は、図８に示すように、受口管部１の内周面に形成された二つの環状溝１ａ，１ｂのうち、受口側に位置する第１環状溝１ａ内に、挿入管部２の外周面との間を密封可能な環状の弾性シール材３を装着するとともに、奥側に位置する第２環状溝１ｂ内には、拡径側に弾性変形可能なＣの字状に形成されたロックリング４と、該ロックリング４の中心が受口管部１の管軸芯Ｘと合致又はその近くに位置するように、該ロックリング４を管径方向内方に付勢保持する芯出し用の環状ゴム５とを装着し、更に、挿入管部２の外周面側の先端部には、地震等に起因して発生する引抜き方向の外力によって両管部１，２が相対離脱移動したとき、ロックリング４に対して管軸芯Ｘ方向から接当してそれ以上の離脱移動を阻止するための環状突起２ａを突出形成し、この環状突起２ａには、両管部１，２を嵌合接続するとき、弾性シール材３及びロックリング４を拡径側に弾性変形させる環状のカム面２ｂを形成してある。
【００４０】
この耐震性の屈曲許容型管継手構造を解体する場合には、挿入管部２の外周面と弾性シール材３の内周面との間、及び、挿入管部２の外周面とロックリング４の内周面との間に、弾性シール材３及びロックリング４を挿入管部２の先端側の環状突起２ａよりも管径方向外方に弾性変形させる複数本の帯板状の解体矢を予め打ち込む必要がある。
【００４１】
また、耐震性の屈曲防止型管継手構造では、図３に示すように、受口管部１の内周面のうち、第１環状溝１ａよりも受口側に第３環状溝１ｃが形成され、この第３環状溝１ｃ内には、縮径側に弾性変形可能な屈曲防止リング６が装着されているとともに、前記第３環状溝１ｃ内の屈曲防止リング６を挿入管部２の外周面に圧接する複数本のセットボルト７を、受口管部１に管径方向外方から螺合してある。
【００４２】
そのため、この耐震性の屈曲防止型管継手構造を解体する場合には、セットボルト７を弛み操作した後、上述の屈曲許容型管継手構の解体時と同様に、複数本の帯板状の解体矢を予め打ち込むことになる。
【００４３】
前記第１装着体Ａは、図１〜図３、図６に示すように、挿入管部２の外周面に沿って周方向で二分割され、かつ、挿入管部２に外套させた状態で締結具１０を介して脱着自在に締付け固定される二つの分割ホルダー１１から構成されているとともに、前記両分割ホルダー１１の連結フランジ部１１Ａ間に、前記挾持機構Ｄを構成する挾持部材１２が、挿入管部２の外周面に対して遠近方向に揺動自在に枢支されている。
【００４４】
前記各分割ホルダー１１は、挿入管部２に対して管径方向外方から装着可能な半円よりも少し小なる部分円環状に形成され、かつ、それの内周面１１ａが、挿入管部２の外周面のホルダー装着箇所における外径とほぼ同一又はそれよりも少し大なる内径に形成されているとともに、各分割ホルダー１１の環状方向両端部に一体形成された連結フランジ部１１Ａには、締結具１０のボルト１０Ａに対する取付け孔１１ｂが形成されている。
【００４５】
そして、挿入管部２に外套させた両分割ホルダー１１の連結フランジ部１１Ａのうち、周方向で相対向する二組の連結フランジ部１１Ａ同士をそれぞれ締結具１０を構成するボルト１０Ａ・ナット１０Ｂにて締付け連結することにより、前記第１装着体Ａが、挿入管部２に対して管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌固定される。
【００４６】
前記両分割ホルダー１１が挿入管部２に外嵌固定された状態では、図６に示すように、周方向で相対向する各組みの連結フランジ部１１Ａ間に、前記挾持機構Ｄを構成する挾持部材１２の板厚よりも大なる空隙が形成されていて、この空隙に臨む各ボルト１０Ａの中間部分に、挾持部材１２が揺動自在に枢支されることになる。
【００４７】
前記挾持部材１２のうち、ボルト１０Ａの軸芯周りでの揺動に連れて挿入管部２の外周面に圧接される挾持作用部には、図７に示すように、挿入管部２の外周面に喰込み可能な複数の喰込み突起１２ａが一体的に突出形成されているとともに、前記挾持部材１２の他端部には、該挾持部材１２に管軸芯Ｘ方向から係合させた管強制移動機構Ｃの係合体１８が外方に離脱移動することを阻止する脱落防止部１２ｂが形成されている。
【００４８】
前記管強制移動機構Ｃは、図１〜図３に示すように、手動式の油圧ポンプ１５とこれに油圧ホース１６を介して接続された左右一対の油圧シリンダ１７とから構成されているとともに、各油圧シリンダ１７のピストンロッド１７Ａの先端部に形成されたテーパーネジ部１７ａには、挾持機構Ｄの挾持部材１２に対して管軸芯方向から係脱自在な係合凹部１８ａを備えた係合体１８が、長さの異なる他のものと取替え自在に螺合されている。
【００４９】
前記第２装着体Ｂには、図１〜図５、図８に示すように、受口管部１の管軸芯Ｘ方向の二箇所、つまり、受口管部１の受口端部１Ａとそれから管軸芯Ｘ方向に離間した小径管部分に対して、該受口管部１の管軸芯Ｘと同芯又はほぼ同芯状態で脱着自在に外装固定される第１ホルダー２０と第２ホルダー２１、及び、これら両ホルダー２０，２１の管軸芯Ｘ方向で相対向する端部同士を固定連結する二本の連結フレーム２２とが備えられている。
【００５０】
また、前記第１ホルダー２０のうち、受口管部１の管軸芯Ｘを挟んで管径方向で相対向する二個所には、各油圧シリンダ１７の前端部を管軸芯Ｘ方向から脱着自在に嵌合保持する円筒状の第１受け部２３が配設されているとともに、前記第２ホルダー２１のうち、受口管部１の管軸芯Ｘを挟んで管径方向で相対向する二個所には、各油圧シリンダ１７の後端部を管軸芯Ｘ方向から脱着自在に嵌合保持する円筒状の第２受け部２４が配設されている。
【００５１】
前記第１ホルダー２０は、受口管部１の開口端部１Ａに対して約２２０度の範囲で、かつ、同芯又はほぼ同芯状態で管軸芯Ｘ方向から脱着自在に嵌合する嵌合部２０ａを備えたほぼＣの字状に形成されているとともに、第１ホルダー２０の外周面側の両端近くに一体形成された連結板部２０ｂには、連結フレーム２２の前端に形成された連結板部２２ａに対して二本のボルト２５で固定連結するためのネジ孔２０ｃが形成されている。
【００５２】
また、前記第１受け部２３は、連結フレーム２２の連結板部２２ａに溶接等で固着されているとともに、前記第２受け部２４は、連結フレーム２２の後部にボルト２６を介して脱着自在に取付けられていて、この第２受け部２４の脱着操作により、各油圧シリンダ１７が第１受け部２３及び第２受け部２４に対して脱着自在に構成されている。
【００５３】
前記第２ホルダー２１は、受口管部１の小径管部分に対して管径方向から装着可能なＵ字状に形成されているとともに、その両端部に形成した筒状のネジ部２１ａには、小径管部分の下側外周面に対してほぼ管径方向から圧接固定する押えボルト２７が螺合されている。
【００５４】
また、前記第２ホルダー２１の左右両側の中間部には、連結フレーム２２に二本のボルト２９を介して脱着自在に固定連結される連結アーム２８が、管軸芯Ｘ方向に沿って一体的に突出形成されているとともに、前記連結アーム２８には、屈曲許容型管継手構造のホルダー取付け間隔及び屈曲防止型管継手構造のホルダー取付け間隔に対応した４つのボルト孔２８ａが形成されていて、管継手構造の種類に応じて４つのボルト孔２８ａを使用選択することにより、第１ホルダー２０と第２ホルダー２１との管軸芯Ｘ方向での取付け間隔を二通りに変更できるように構成されている。
【００５５】
そして、接続されている受口管部１と挿入管部２とを管軸芯Ｘ方向に沿って引抜き分離（解体）する場合、第２装着体Ｂを構成する第１ホルダー２０と第２ホルダー２１とを、解体すべき管継手構造のホルダー取付け間隔に対応した間隔で固定連結したのち、第１ホルダー２０の嵌合部２０ａを、受口管部１の受口端部１Ａに管軸芯Ｘ方向から嵌合保持させるとともに、第２ホルダー２１を、受口管部１の小径管部分に対して管径方向外方から装着し、第２ホルダー２１の両端部に設けられた押えボルト２７をそれぞれ締付け側に螺合操作して、第２ホルダー２１を受口管部１の小径管部分に固定する。
【００５６】
次に、第１装着体Ａを構成する両分割ホルダー１１を挿入管部２に外套させるとともに、両分割ホルダー１１の連結フランジ部１１Ａ間に保持した挾持機構Ｄの挾持部材１２を、第２装着体Ｂの左右に取付けられた油圧シリンダ１７の各係合体１８の係合凹部１８ａに係合保持させたのち、両分割ホルダー１１の連結フランジ部１１Ａ同士をそれぞれ締結具１０を構成するボルト１０Ａ・ナット１０Ｂにて締付け連結し、第１装着体Ａを挿入管部２に固定する。
【００５７】
この状態で管強制移動機構Ｃの油圧ポンプ１５を手動操作して圧油を左右の油圧シリンダ１７に供給し、各油圧シリンダ１７のピストンロッド１７Ａを伸展作動させる。このピストンロッド１７Ａの伸展作動に連れて、各挾持部材１２がボルト１０Ａ周りで揺動し、挾持部材１２の挾持作用部が挿入管部２の外周面に圧接される同時に、該挾持作用部に突出形成された喰込み突起１２ａが挿入管部２の外周面に喰込み、第１装着体Ａが挿入管部２に強固に固定される。
【００５８】
更に、各油圧シリンダ１７のピストンロッド１７Ａが引き続いて伸展作動すると、第１装着体Ａの両分割ホルダー１１と挾持機構Ｄの両挾持部材１２及び第２装着体Ｂの第１ホルダー２０を介して、受口管部１と挿入管部２とに管引抜き方向の強制移動力が付与され、受口管部１と挿入管部２とが管軸芯Ｘ方向に沿って引抜き分離（解体）される。
【００５９】
それ故に、受口管部１の管軸芯Ｘに対して挿入管部２の管軸芯Ｘが傾斜している場合でも、挾持機構Ｄの両挾持部材１２による挟持動作に連れて、受口管部１の管軸芯Ｘから最も離れる挿入管部２の管壁部分が一方の両挾持部材１２で押圧され、受口管部１の管軸芯Ｘと挿入管部２の管軸芯Ｘとが合致する方向に自動修正される。
【００６０】
しかも、管強制移動機構Ｃを構成する両油圧シリンダ１７の移動力付与作動を利用して挾持機構Ｄの両挾持部材１２を挟持作動させるが故に、接続された両管部１，２の引抜き抵抗に抗して、挿入管部２に外嵌装着された第１装着体Ａを所定位置に確実、強力に固定保持することができる。
【００６１】
尚、図３に示すように、屈曲防止型管継手構造の場合では、管軸芯Ｘ方向での長さが短い係合体１８を、油圧シリンダ１７のテーパーネジ部１７ａに取付けるとともに、図８に示すように、屈曲許容型管継手構造の場合では、管軸芯Ｘ方向での長さが長い係合体１８を、油圧シリンダ１７のテーパーネジ部１７ａに取付ける。
【００６２】
〔第２実施形態〕
図９は、受口管部１の開口端部１Ａの口径が種類によって異なる場合の対応策で、前記第１ホルダー２０の嵌合部２０ａに対して管軸芯方向から脱着自在に嵌合する嵌合接合部３０ａを備えた一つ又は複数のアタプター３０Ａ，３０Ｂを製作するとともに、各アタプター３０Ａ，３０Ｂには、口径の異なる受口管部１の開口端部１Ａに対して管軸芯方向から脱着自在に嵌合する嵌合部３０ｂを形成し、受口管部１の開口端部１Ａの種類に応じてアタプター３０Ａ，３０Ｂを選択的に使い分けるように構成してもよい。
尚、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。
【００６３】
〔第３実施形態〕
図１０は、接続されている両管部１，２とを管軸芯Ｘ方向に沿って引抜き分離する解体機能と、両管部１，２とを管軸芯Ｘ方向から嵌合接続する接続機能とを備えた管脱着装置を示し、前記管強制移動機構Ｃの両油圧シリンダ１７として、両装着体Ａ，Ｂに管引抜き方向又は管接続方向の移動力を選択的に付与可能な復動式のものから構成するとともに、第１装着体Ａを構成する両分割ホルダー１１を、挿入管部２に対して反転装着自在に構成し、更に、前記挾持機構Ｄの各挾持部材１２に、油圧シリンダ１７の係合体１８に連結ピン３２を介して脱着自在に枢支連結するための連結孔３３を形成し、もって、挿入管部２に対する第１装着体Ａの反転装着操作と、両油圧シリンダ１７の伸展又は収縮作動制御とにより、両装着体Ａ，Ｂに管引抜き方向又は管接続方向の移動力を選択的に付与するように構成して実施してもよい。
尚、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。
【００６４】
〔第４実施形態〕
図１１の（イ）に示すように、前記挾持部材１２の挾持作用部を、その幅方向の一端側ほど突出量が大となる傾斜姿勢又は彎曲姿勢に構成するとともに、その挾持作用部の全域に喰込み突起１２ａを形成して実施してもよく、また、図１１の（ロ）に示すように、前記挾持部材１２の挾持作用部を、その幅方向の中央側ほど突出量が大となる傾斜姿勢又は彎曲姿勢に構成するとともに、その挾持作用部の全域に喰込み突起１２ａを形成して実施してもよい。
尚、その他の構成は、第３実施形態で説明した構成と同一であるから、それの説明は省略する。
【００６５】
〔その他の実施形態〕
（１）上述の各実施形態では、前記管強制移動機構Ｃとして、油圧シリンダ１７等の流体圧シリンダを用いて構成したが、油圧モータ等の他のアクチュエーターを用いて構成してもよい。
要するに、前記管強制移動機構Ｃとしては、両装着体Ａ，Ｂに管引抜き方向又は管接続方向若しくは両方向の移動力を付与することのできるものであれば、いかなる構造ものを用いてもよい。
【００６６】
（２）上述の各実施形態では、前記第１装着体Ａを、挿入管部２の外周面に沿って周方向で二分割され、かつ、挿入管部２に外套させた状態で締結具１０を介して脱着自在に締付け固定される二つの分割ホルダー１１から構成したが、挿入管部２の外周面に沿って周方向で三つ以上に分割された分割ホルダー１１から構成してもよい。
【００６７】
更に、前記第１装着体Ａを、第２装着体Ｂと同様に、挿入管部２の管軸芯Ｘ方向の二箇所に対して、該挿入管部２の管軸芯Ｘと同芯又はほぼ同芯状態で脱着自在に外装固定される第１ホルダーと第２ホルダーとから構成してもよい。
【００６８】
（３）上述の各実施形態では、前記第２装着体Ｂを、受口管部１の管軸芯Ｘ方向の二箇所に対して、受口管部１の管軸芯Ｘと同芯又はほぼ同芯状態で脱着自在に外装固定される第１ホルダー２０と第２ホルダー２１とから構成したが、この第２装着体Ｂを、受口管部１の管軸芯Ｘ方向における三箇所以上の部位に対して管軸芯Ｘ方向での移動を規制した状態で脱着自在に外嵌装着するように構成してもよい。
更に、前記第２装着体Ｂを、第１装着体Ａと同様に、受口管部１の外周面に沿って周方向で複数に分割され、かつ、受口管部１に外套させた状態で締結具を介して脱着自在に締付け固定される複数の分割ホルダーから構成してもよい。
【００６９】
（４）前記挟持機構Ｄとしては、管強制移動機構Ｃの移動力付与作動に連動して挿入管部２の外周面の周方向複数箇所を管径方向外方側から挾持することのできるものであれば、いかなる構造ものを用いてもよい。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す継手解体器の分解斜視図
【図２】両管部に装着したときの斜視図
【図３】屈曲防止型管継手構造に装着したときの要部の拡大半断面図
【図４】第１ホルダーの正面図
【図５】第２ホルダーの正面図
【図６】第１装着体の半断面正面図
【図７】（イ）は非挟持状態を示す要部の拡大断面図
（ロ）は挟持状態を示す要部の拡大断面図
【図８】屈曲許容型管継手構造に装着したときの要部の拡大半断面図
【図９】本発明の第２実施形態を示す要部の拡大断面図
【図１０】本発明の第３実施形態を示し、屈曲防止型管継手構造に装着したときの要部の拡大半断面図
【図１１】本発明の第４実施形態を示し、（イ）、（ロ）はそれぞれ挟持部材の拡大平面図
【図１２】従来の管脱着装置を示す分解斜視図
【図１３】セッティング後の全体の斜視図
【符号の説明】
Ａ第１装着体
Ｂ第２装着体
Ｃ管強制移動機構
Ｄ挟持機構
Ｘ管軸芯
１受口管部
２挿入管部
１０締結具
１１分割ホルダー
１１Ａ連結フランジ部
１２挟持部材
２０第１ホルダー
２０ａ嵌合部
２１第２ホルダー
２３第１受け部
２４第２受け部[0001]
BACKGROUND OF THE INVENTION
The present invention, for example, draws and separates (disassembles) fluid transport pipes such as water pipes and gas pipes that are fitted and connected along the pipe axis direction, or separates the fluid transport pipes from the pipe axis direction. The present invention relates to a pipe detaching apparatus used for fitting connection.
[0002]
[Prior art]
In recent years, when a pulling force (tensile force) in the axial direction of the pipe axis due to an earthquake or non-uniform subsidence is applied to the piping system of the fluid transport pipe, it is inserted and connected to the receiving pipe section in the piping system. Many seismic-resistant pipe joint structures having an enhanced separation preventing function for preventing the insertion tube portion from being separated by a pulling force are employed.
[0003]
As this earthquake-resistant pipe joint structure, for example, as shown in FIG. 8, the first annular groove 1 a, 1 b formed on the inner peripheral surface of the receiving pipe portion 1 is located on the receiving side. In the annular groove 1a, an elastic sealing material 3 capable of sealing between the outer peripheral surface of the insertion tube portion 2 is mounted, and in the second annular groove 1b located on the back side, it can be elastically deformed to the diameter-expanding side. A lock ring 4 is mounted, and further, at the distal end portion on the outer peripheral surface side of the insertion tube portion 2, when both the tube portions 1 and 2 are moved relative to each other by the pulling force, the tube axis X An annular projection 2a is formed in contact with the direction to prevent further disengagement movement. When the pipe portions 1 and 2 are fitted and connected to the annular projection 2a, the elastic sealing material 3 and the lock What formed the cyclic | annular cam surface 2b which elastically deforms the ring 4 to the diameter expansion side is used.
[0004]
Therefore, in the pipe joint structure for earthquake resistance, when the receiving pipe part 1 and the insertion pipe part 2 are connected, both the pipe parts 1 and 2 may be moved relatively close to each other along the pipe axis X. However, in the case of disassembling the connected receiving pipe part 1 and the insertion pipe part 2, the outer circumference of the insertion pipe part 2 and the inner peripheral surface of the elastic seal material 3 and the outer circumference of the insertion pipe part 2 A plurality of strips that elastically deform the elastic sealing material 3 and the lock ring 4 outwardly in the tube radial direction from the annular projection 2a on the distal end side of the insertion tube portion 2 between the surface and the inner peripheral surface of the lock ring 4 Since it is necessary to drive in the shape of a dismantling arrow, the disassembly is more difficult.
[0005]
Therefore, in the conventional tube desorbing device, as shown in FIGS. 12 and 13, the insertion tube portion 2 inserted and connected to the receiving tube portion 1 from the tube axis X direction is arranged in the tube axis X direction. A first mounting body A that is detachably fitted in a state where movement is restricted, and a detachable outer attachment that is attached to the receiving pipe portion 1 in a state where movement in the tube axis X direction is restricted. And a receiving portion 52 formed at two locations opposite to each other in the pipe radial direction across the tube axis X of the first mounting body A, and the tube shaft of the second mounting body B Between the receiving portions 54 formed opposite to each other in the tube radial direction across the core X, the receiving portions 52, 54 facing each other in the tube axis X direction are attached to both the mounting bodies A, B. A tube forced moving mechanism C that applies a moving force in the tube drawing direction or the tube connecting direction is detachably mounted.
[0006]
The first attachment body A is formed in a semi-annular shape that can be externally attached to the insertion tube portion 2 from the tube diameter direction, and is separated by about 220 degrees in the circumferential direction at both ends of the semi-annular direction. A presser bolt 51 provided with a pressing piece 50 that is press-contacted to the outer peripheral surface of the insertion tube portion 2 from the pipe radial direction is screwed into each of the parts. A T-shaped first engagement protrusion that constitutes the receiving portion 52 is formed in each portion that is slightly displaced to the center side in the semi-annular direction from the screwing position.
[0007]
The second mounting body B is formed in a semi-annular shape that can be mounted on the receiving tube portion 1 from the tube radial direction, on both end sides in the semi-annular direction on the inner surface thereof, and the receiving tube The same shape that can contact the opening end 1A from the direction of the tube axis X in a portion spaced in the tube axis X direction larger than the width in the axis direction of the opening end 1A of the portion 1 Are formed integrally with each other, and T-shaped second engaging projections constituting the receiving portion 54 are formed at both ends in the semi-annular direction on the outer surface of the second mounting body B. Each is formed.
[0008]
The first mounting body A is detachable in a state in which movement in the tube axis X direction is restricted with respect to the insertion tube portion 2 by a screwing operation to the fastening and fixing side by the two presser bolts 51. The second mounting body B is externally mounted, and the second mounting body B is in the tube axis X direction with respect to the receiving tube portion 1 by a locking projection 53 that contacts the opening end 1A of the receiving tube portion 1. It is externally fitted so as to be detachable in a state in which the movement is restricted.
[0009]
The tube moving operation mechanism C includes a rack 56 in which a large number of engagement holes 55 are formed at a predetermined pitch along the tube axis X direction, and the rack 56 is pierced and held so as to be reciprocally movable. A gear case 58 having a pinion (not shown) that meshes with the 56 engagement holes 55 is provided as a main component, and one end of the rack 56 has a first engagement protrusion of the first mounting body A. A connecting member 59 having a first engaging groove 59a that is detachably fitted with respect to 52 from above is movably attached within a certain range in the pipe radial direction. The connecting part 60 provided with the 2nd engagement groove | channel 60a fitted to the 2nd engagement protrusion 54 of 2 mounting body B so that attachment or detachment is possible from upper direction is integrally formed, and it is comprised.
[0010]
Of the operation shaft 61 integrally formed with the pinion, a shaft end portion protruding outward from the gear case 58 has a hexagonal cylindrical operation portion 62 that can be operated with a tool (artificial operation tool) such as a ratchet wrench. Is fixed by external fitting.
[0011]
When the connected receiving tube portion 1 and the insertion tube portion 2 are pulled out and separated (disassembled), the first mounting body A is fitted and fixed to the insertion tube portion 2, and the receiving tube portion After the second mounting body B is externally fitted to the opening end portion 1A of the one, the protruding length of the rack 56 with respect to the gear case 58 in the direction of the tube axis X and the radial direction of the connecting member 59 with respect to the rack 56 The first and second protrusions 52 of the first attachment body A and the second engagement protrusion 54 of the second attachment body B are adjusted to adjust the projection lengths of the connection members 59 constituting the tube moving operation mechanism C. The first engagement groove 59a and the second engagement groove 60a on the gear case 58 side are fitted and held. In this state, the operating portion 62 of the gear case 58 is rotated to apply a moving force in the tube pulling direction to the first mounting body A and the second mounting body B, and the receiving tube portion 1 and the insertion tube portion 2 are connected. Release the connection by moving relative distance.
[0012]
[Problems to be solved by the invention]
In the conventional pipe attaching / detaching device, the first attachment body A attached to the insertion pipe part 2 against the pulling resistance of the connected pipe parts 1 and 2 or the connection resistance of the connected pipe parts 1 and 2. In order to securely fix and hold the first mounting body A in place, it is necessary to strongly tighten the presser bolts 51 screwed into both ends of the first mounting body A. It took a lot of effort. In addition, since the presser bolts 51 are individually tightened, the tube shaft core of the insertion tube portion 2 is moved relative to the tube shaft core of the receiving tube portion 1 due to variations in the tightening operation amount of the presser bolts 51. As a result, when disassembling in the earthquake-resistant pipe joint structure as shown in FIG. 8, the annular protrusion 2a on the distal end side of the insertion tube portion 2 is formed by the lock ring 4, the elastic seal material 3 or the receiving tube. Since the two pipe parts 1 and 2 are twisted, such as being caught on the inner peripheral surface of the part 1, not only the pulling operation force of both the pipe parts 1 and 2 is abnormally increased, but also the lock ring 4 is damaged. Inconvenience to invite.
[0013]
The present invention has been made in view of the above-described actual situation, and its main problem is to utilize the moving force in the tube pulling direction or the tube connecting direction applied to both mounting bodies by the tube forced moving mechanism. The first mounting body mounted on the insertion tube portion can be securely and strongly fixed, and the tube axis of the insertion tube portion is inclined with respect to the tube axis of the receiving tube portion. However, a pipe detachment device that can reduce the operating force required to separate or connect both pipe parts while suppressing deformation and breakage of parts by correcting it to the same core or almost concentric state as much as possible. There is in point to do.
[0014]
[Means for Solving the Problems]
 According to a first aspect of the present invention, there is provided a tube detachment apparatus that is detachable in a state in which movement in the tube axis direction is restricted with respect to an insertion tube portion that is inserted and connected to the receiving tube portion from the tube axis direction. A first mounting body that is externally mounted and a second mounting body that is detachably mounted in a state in which movement in the tube axis direction is restricted with respect to a plurality of portions in the tube axis direction of the receiving tube portion. And a tube forced moving mechanism for providing a moving force in the tube pulling direction or the tube connecting direction to the both mounting bodies, between the first mounting body and the second mounting body. Further, the first mounting body is provided with a gripping mechanism for gripping a plurality of locations in the circumferential direction of the outer peripheral surface of the insertion tube portion from the outer side in the radial direction of the tube in conjunction with the movement force applying operation of the tube forced movement mechanism. IsThe second mounting body is concentric or substantially concentric with the tube axis of the receiving tube portion with respect to the two portions of the end portion of the receiving tube portion and the portion spaced from the end portion in the tube axis direction. In the configuration provided with a first holder and a second holder that are detachably fixed in a state,
 Among the first holders, one first receiving part for holding the pipe forced moving mechanism detachably at two positions opposite to each other in the pipe radial direction across the pipe axis of the receiving pipe part In the second holder of the second holder, the pipe forced moving mechanism is detachably held at two positions opposite to each other in the pipe radial direction across the pipe axis of the receiving pipe section. For the other second receiving portion forThere is in point.
[0015]
According to the above characteristic configuration, the tube forcibly moving mechanism is installed between the first mounting body that is externally fitted to the insertion tube portion and the second mounting body that is externally fitted to the receiving tube portion, and the tube When applying the moving force in the tube pull-out direction or the pipe connecting direction to both attachment bodies with the forced movement mechanism, the holding mechanism provided in the first attachment body is inserted in conjunction with the movement force application operation of the tube forced movement mechanism. For example, even when the tube shaft core of the insertion tube portion is inclined with respect to the tube shaft core of the receiving tube portion, by holding a plurality of circumferential positions on the outer peripheral surface of the tube portion from the outer side in the tube radial direction. With the clamping operation of the holding mechanism, the tube wall portion of the insertion tube portion that is farthest from the tube axis of the receiving tube portion is pressed, and the tube axis of the receiving tube portion and the tube axis of the insertion tube portion are It is corrected in the matching direction.
[0016]
In addition, the second mounting body is configured to be detachably fitted and attached to a plurality of portions in the tube axis direction of the receiving tube portion in a state where movement in the tube axis direction is restricted. Therefore, the second mounting body externally fitted to the receiving pipe part is externally held at a predetermined position against the pulling resistance of both connected pipe parts or the connection resistance of both connected pipe parts. In addition, the second mounting body can be easily attached in a concentric or almost concentric state with the tube axis of the receiving pipe portion.
[0017]
Further, since the holding mechanism is clamped using the moving force imparting operation of the tube forced moving mechanism, the insertion tube is resistant to the pulling resistance of both connected pipe portions or the connecting resistance of both connected pipe portions. The first mounting body that is externally mounted on the part can be securely fixed and held at a predetermined position, and a special drive source for driving the clamping mechanism is not required.
[0018]
Therefore, using the moving force in the tube pull-out direction or tube connection direction applied to both mounting bodies by the tube forced movement mechanism, the structure is simplified and the manufacturing cost is reduced, and the mounting tube is mounted. The attached first mounting body can be securely and firmly held, and both of them can be used even when the tube axis of the insertion tube portion is inclined with respect to the tube axis of the receiving tube portion. The tube part can be corrected to be concentric or substantially concentric as much as possible, and the automatic fitting function by the clamping mechanism can be enhanced by improving the accuracy of external fitting of the second mounting body to the receiving pipe part. Due to the synergistic action, it is possible to reduce the operating force required to separate or connect the two pipe portions while suppressing deformation and breakage of the parts.
[0020]
 Also,According to the above characteristic configuration, the first holder and the second holder constituting the second mounting body are connected by being externally fixed at two positions spaced apart in the tube axis direction of the receiving pipe portion. The second mounting body externally fitted to the receiving pipe part can be externally held at a predetermined position against the pulling resistance of both pipe parts or the connection resistance of both pipe parts to be connected. The mounting body can be easily attached in a concentric or almost concentric state with the tube axis of the receiving pipe portion.
[0021]
Accordingly, not only can the second mounting body mounted on the receiving pipe portion be securely and strongly fitted and held, but also the pinching mechanism can be improved by improving the external fitting mounting accuracy of the second mounting body with respect to the receiving pipe portion. Therefore, it is possible to enhance the automatic centering function by suppressing the deformation and breakage of parts and reducing the operating force required to separate or connect both pipe portions. In addition, the relative movement in the tube axis direction of the second mounting body can be reliably regulated with a simple structure using the end of the receiving tube portion.
[0023]
 further,According to the above characteristic configuration, both the first receiving portions of the first holder and both the second receiving portions of the second holder are arranged at portions facing each other in the tube radial direction with the tube axis of the receiving tube portion interposed therebetween. Since the tube forced movement mechanism is held at both ends across both the first receiving portions of the first holder and the second receiving portions of the second holder, the tube forced movement mechanism is It can be mounted in parallel or substantially parallel to the tube axis of the part.
[0024]
Therefore, since the direction in which the moving force applied to both attachments by the tube forced movement mechanism is the tube axis direction, the twisting at the time of pulling out or connecting the two pipe portions is reduced, and the two pipe portions are separated or Reduction of the operation force required for connection can be further promoted.
[0025]
 Claims of the invention2A characteristic configuration of the pipe detaching apparatus is that the first holder and the second holder are fixedly connected in a state in which the mounting interval in the pipe axis direction can be changed to a plurality.
[0026]
According to the above characteristic configuration, the first holder and the second holder constituting the second mounting body are externally fixed at two locations spaced apart in the tube axis direction of the receiving tube portion, and the receiving tube portion The first and second holders can be handled as one component while ensuring that the second mounting body externally fitted to the outer body can be securely fitted and held in place. Nevertheless, the mounting interval between the first holder and the second holder in the tube axis direction can be changed to an appropriate interval according to the joining length of both the tube portions, the shape of the receiving tube portion, and the like.
[0027]
Therefore, the second mounting body can be securely, powerfully, and efficiently mounted easily on a plurality of types of receiving pipe portions having different shapes and the like.
[0028]
 Claims of the invention3The tube desorption device according to the present invention is characterized in that the first attachment body is divided into a plurality of portions in the circumferential direction along the outer peripheral surface of the insertion tube portion, and is attached and detached via a fastener in a state where the insertion tube portion is put on the outer tube. It is composed of a plurality of split holders that are freely clamped and fixed, and a gripping member that constitutes the gripping mechanism is swingably held between the connecting flange portions of the split holders.
[0029]
According to the above-described characteristic configuration, the holding member constituting the holding mechanism can be swung freely between the connecting flange portions using the connecting flange portion of the split holder that is fastened and fixed to the insertion tube portion in a mantle state. By holding the holding member, it is possible to reduce the number of attachment members for holding the holding member in a swingable manner.
[0030]
 Claims of the invention4The tube desorption device according to the present invention is characterized in that the first holder is formed with a fitting portion that is detachably fitted from the tube axis direction in a concentric or substantially concentric state with respect to the end portion of the receiving tube portion. There is in point.
[0031]
 According to the above characteristic configuration,1By fitting the fitting portion formed in the holder from the tube axis direction in a concentric or substantially concentric state with the end portion of the receiving pipe portion,1The displacement of the holder in the tube diameter direction can be restricted, and a large reaction force at the time of disassembly can be reliably received.
[0032]
Therefore, since the automatic centering function by the clamping mechanism can be enhanced by improving the external fitting accuracy of the second mounting body with respect to the receiving tube portion, the reduction of the operation force required for the separation or connection of both tube portions is promoted. can do.
[0033]
 Claims of the invention5A characteristic configuration of the tube detaching apparatus is that a plurality of protrusions that can be eaten on the outer peripheral surface of the insertion tube portion are formed in the holding action portions of the plurality of holding members that constitute the holding mechanism.
[0034]
According to the above characteristic configuration, the tube forcibly moving mechanism is installed between the first mounting body that is externally fitted to the insertion tube portion and the second mounting body that is externally fitted to the receiving tube portion, and the tube When applying the moving force in the tube pulling direction or the pipe connecting direction to both attachment bodies by the forced movement mechanism, a plurality of holding mechanisms provided in the first attachment body are interlocked with the movement force applying operation of the tube forced movement mechanism. The gripping member grips a plurality of circumferential positions on the outer peripheral surface of the insertion tube portion from the outer side in the radial direction of the tube, and a plurality of protrusions formed on the gripping action portion of each gripping member bite the outer peripheral surface of the insertion tube portion. Include.
[0035]
Therefore, by using the moving force in the tube pulling direction or the tube connecting direction applied to both mounting bodies by the tube forced moving mechanism, the holding mechanism is operated to be simplified, thereby simplifying the structure and reducing the manufacturing cost. The first attachment body attached to the insertion tube portion can be more securely and strongly held by the sandwiching action and the biting action by the sandwiching mechanism.
[0036]
 Claims of the invention6The tube desorption device according to the present invention is characterized in that the tube forced movement mechanism includes both the receiving portions of the first holder and the receiving portions of the second holder over both receiving portions facing each other in the tube axis direction. A fluid pressure cylinder that is detachably mounted is provided.
[0037]
According to the above characteristic configuration, it is only necessary to install the fluid pressure cylinder constituting the tube forced movement mechanism between the first receiving portions of the first holder and the second receiving portions of the second holder. The assembly of the forced movement mechanism can be facilitated.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
1 to 8 show other fluid transport pipes P with respect to the receiving pipe portion 1 of the fluid transport pipe P such as a water pipe or a gas pipe constructed using cast iron pipes, steel pipes or vinyl chloride pipes. An example of a pipe detachment apparatus used in a pipe joint structure in which the insertion pipe part 2 is inserted and connected in a sealed state along the pipe axis X direction. The connected receiving pipe part 1 and the insertion pipe part 2 are connected to each other. The joint dismantling device used when pulling out and separating (disassembling) along the tube axis X direction is shown, and the outside of the tube radial direction is controlled in a state where movement in the tube axis X direction is restricted with respect to the insertion tube portion 2. Tube diameter in a state in which movement in the tube axis X direction is restricted with respect to a plurality of portions in the tube axis X direction of the first tube A that is detachably fitted from the first tube And a second mounting body B that is externally fitted and detachable from the outer side in the direction, and the first mounting body A and the second mounting body B, In the meantime, a tube forced moving mechanism C for applying a moving force in the tube pulling direction to both the mounting bodies A and B is installed. Further, the first mounting body A is provided with a moving force of the tube forced moving mechanism C. A gripping mechanism D is provided for gripping a plurality of circumferential locations on the outer peripheral surface of the insertion tube portion 2 from the outer side in the tube radial direction in conjunction with the operation.
[0039]
As the pipe joint structure of the receiving pipe part 1 and the insertion pipe part 2, an earthquake-resistant bendable pipe joint structure as shown in FIG. 8 and an earthquake-resistant bend-proof pipe joint as shown in FIG. There are structures.
As shown in FIG. 8, the earthquake-resistant bending-permissible pipe joint structure includes a first annular ring located on the receiving side of two annular grooves 1 a and 1 b formed on the inner peripheral surface of the receiving pipe portion 1. An annular elastic sealing material 3 capable of sealing between the outer peripheral surface of the insertion tube portion 2 is mounted in the groove 1a, and the second annular groove 1b located on the back side is elastically deformed toward the diameter expansion side. The lock ring 4 is formed in a C-shaped lock ring, and the lock ring 4 has a tube diameter such that the center of the lock ring 4 is located at or near the tube axis X of the receiving tube portion 1. An annular rubber 5 for centering that is biased inward in the direction is mounted, and both ends of the insertion tube portion 2 on the outer peripheral surface side are pulled by external forces in the pulling direction caused by an earthquake or the like. When the pipe parts 1 and 2 move relative to each other, they come into contact with the lock ring 4 from the direction of the tube axis X to prevent further movement. An annular projection 2a for projecting is formed, and the annular projection 2a is an annular cam that elastically deforms the elastic seal member 3 and the lock ring 4 to the diameter expansion side when both the pipe portions 1 and 2 are fitted and connected. Surface 2b is formed.
[0040]
When disassembling this earthquake-resistant bending-permissible pipe joint structure, between the outer peripheral surface of the insertion tube portion 2 and the inner peripheral surface of the elastic seal material 3 and between the outer peripheral surface of the insertion tube portion 2 and the lock ring 4. A plurality of strip-shaped disassembly arrows for elastically deforming the elastic seal material 3 and the lock ring 4 outwardly in the tube radial direction from the annular projection 2a on the distal end side of the insertion tube portion 2 It is necessary to drive in advance.
[0041]
In addition, in the earthquake-resistant anti-bending type pipe joint structure, as shown in FIG. 3, the third annular groove 1 c is formed on the inner peripheral surface of the receiving pipe portion 1 on the receiving side with respect to the first annular groove 1 a. In the third annular groove 1c, an anti-bending ring 6 that is elastically deformable on the reduced diameter side is mounted, and the anti-bending ring 6 in the third annular groove 1c is connected to the outer periphery of the insertion tube portion 2. A plurality of set bolts 7 that are in pressure contact with the surface are screwed into the receiving pipe portion 1 from the outside in the pipe radial direction.
[0042]
Therefore, when disassembling this earthquake-resistant anti-bending type pipe joint structure, after the set bolt 7 is loosened, a plurality of strip-plate-like structures are formed in the same manner as in the above-mentioned disassembly of the bending-permissible pipe joint structure. A demolition arrow will be driven in advance.
[0043]
As shown in FIGS. 1 to 3 and 6, the first mounting body A is divided into two in the circumferential direction along the outer peripheral surface of the insertion tube portion 2, and the insertion tube portion 2 is covered with the sheath. A holding member 12 that constitutes the holding mechanism D is formed between two split holders 11 that are detachably fastened and fixed via a fastener 10, and between the connecting flange portions 11 A of the split holders 11. The insertion tube portion 2 is pivotally supported so as to be swingable in the perspective direction with respect to the outer peripheral surface of the insertion tube portion 2.
[0044]
Each of the divided holders 11 is formed in a partial annular shape that is slightly smaller than a semicircle that can be attached to the insertion tube portion 2 from the outside in the radial direction of the tube, and an inner peripheral surface 11a thereof is formed in the insertion tube portion. In the connecting flange portion 11A that is formed to have an inner diameter that is substantially the same as or slightly larger than the outer diameter of the holder mounting portion on the outer peripheral surface of the two outer peripheral surfaces, A mounting hole 11b for the bolt 10A of the fastener 10 is formed.
[0045]
Then, among the connecting flange portions 11A of both split holders 11 covered by the insertion tube portion 2, the two sets of connecting flange portions 11A facing each other in the circumferential direction are respectively connected to the bolt 10A and the nut 10B constituting the fastener 10. By tightening and connecting, the first mounting body A is detachably fitted and fixed to the insertion tube portion 2 in a state where movement in the tube axis X direction is restricted.
[0046]
In a state where both the split holders 11 are externally fitted and fixed to the insertion tube portion 2, as shown in FIG. 6, the gripping mechanism D is configured between the coupling flange portions 11 A of each pair facing each other in the circumferential direction. A gap larger than the plate thickness of the member 12 is formed, and the holding member 12 is pivotally supported in an intermediate portion of each bolt 10A facing the gap.
[0047]
As shown in FIG. 7, the holding member 12 is pressed against the outer peripheral surface of the insertion tube portion 2 as the bolt 10 A swings around the axis of the bolt 10 A. A plurality of biting protrusions 12a that can bite into the surface are integrally formed to project, and the other end of the holding member 12 is engaged with the holding member 12 from the tube axis X direction. A drop-off preventing portion 12b that prevents the engaging body 18 of the forcible moving mechanism C from moving outward is formed.
[0048]
As shown in FIGS. 1 to 3, the pipe forced moving mechanism C is composed of a manual hydraulic pump 15 and a pair of left and right hydraulic cylinders 17 connected to the hydraulic pump 15 via a hydraulic hose 16. The taper screw portion 17a formed at the tip of the piston rod 17A of each hydraulic cylinder 17 is provided with an engagement recess 18a that can be engaged with and disengaged from the tube axis direction with respect to the holding member 12 of the holding mechanism D. 18 is screwed so as to be interchangeable with another having a different length.
[0049]
As shown in FIGS. 1 to 5 and 8, the second mounting body B has two locations in the tube axis X direction of the receiving tube portion 1, that is, the receiving end portion 1 A of the receiving tube portion 1. And a first holder 20 and a first holder 20 that are externally fixed to the tube axis X of the receiving tube portion 1 so as to be detachable with respect to the small-diameter tube portion that is spaced apart in the tube axis X direction. 2 holders 21 and two connection frames 22 for fixedly connecting the ends of the holders 20 and 21 facing each other in the tube axis X direction.
[0050]
In addition, the front end of each hydraulic cylinder 17 is attached to and detached from the tube axis X direction at two locations of the first holder 20 that face each other in the tube diameter direction across the tube axis X of the receiving tube portion 1. A cylindrical first receiving portion 23 that is freely fitted and held is disposed, and of the second holder 21, the pipe axial core X of the receiving tube portion 1 is sandwiched so as to face each other in the tube radial direction. Cylindrical second receiving portions 24 that are fitted and held so that the rear end portions of the respective hydraulic cylinders 17 are detachable from the tube axis X direction are disposed at two locations.
[0051]
The first holder 20 is fitted within a range of about 220 degrees with respect to the opening end portion 1A of the receiving tube portion 1 and is detachably fitted in the tube axis X direction in a concentric or substantially concentric state. The connecting plate portion 20b is formed at the front end of the connecting frame 22 and is formed in a substantially C shape with the joint portion 20a, and integrally formed near both ends on the outer peripheral surface side of the first holder 20. A screw hole 20c is formed to be fixedly connected to the connecting plate portion 22a with two bolts 25.
[0052]
The first receiving portion 23 is fixed to the connecting plate portion 22a of the connecting frame 22 by welding or the like, and the second receiving portion 24 is detachably attached to the rear portion of the connecting frame 22 via a bolt 26. The hydraulic cylinders 17 are configured to be detachable from the first receiving portion 23 and the second receiving portion 24 by attaching / detaching the second receiving portion 24.
[0053]
The second holder 21 is formed in a U-shape that can be attached to the small-diameter pipe portion of the receiving pipe part 1 from the pipe radial direction, and the cylindrical screw part 21a formed at both ends thereof has A presser bolt 27 is press-fitted to the lower outer peripheral surface of the small-diameter pipe portion so as to be pressed against and fixed from the pipe diameter direction.
[0054]
Further, a connecting arm 28 fixedly connected to the connecting frame 22 via two bolts 29 is integrally provided along the tube axis X direction at the intermediate portions on the left and right sides of the second holder 21. The connecting arm 28 is formed with four bolt holes 28a corresponding to the holder mounting interval of the bending-permissible type pipe joint structure and the holder mounting interval of the anti-bending type pipe joint structure, By selecting and using four bolt holes 28a according to the type of pipe joint structure, the mounting interval in the tube axis X direction between the first holder 20 and the second holder 21 can be changed in two ways. ing.
[0055]
When the connected receiving tube portion 1 and the insertion tube portion 2 are pulled out and separated (disassembled) along the tube axis X direction, the first holder 20 and the second holder constituting the second mounting body B 21 is fixedly connected at an interval corresponding to the holder mounting interval of the pipe joint structure to be disassembled, and the fitting portion 20a of the first holder 20 is connected to the receiving end 1A of the receiving tube portion 1 at the tube axis. While fitting and holding from the X direction, the second holder 21 is attached to the small-diameter pipe portion of the receiving pipe part 1 from the outside in the pipe radial direction, and presser bolts 27 provided at both ends of the second holder 21 are mounted. The second holder 21 is fixed to the small-diameter pipe portion of the receiving pipe section 1 by screwing each to the tightening side.
[0056]
Next, both the split holders 11 constituting the first mounting body A are put on the insertion tube portion 2 and the gripping member 12 of the gripping mechanism D held between the connecting flange portions 11A of the split holders 11 is second mounted. After engaging and holding the engaging recesses 18a of the engaging bodies 18 of the hydraulic cylinders 17 attached to the left and right of the body B, the connecting flange portions 11A of the two split holders 11 are connected to the bolts 10A. The first mounting body A is fixed to the insertion tube portion 2 by tightening and connecting with the nut 10B.
[0057]
In this state, the hydraulic pump 15 of the pipe forced moving mechanism C is manually operated to supply pressure oil to the left and right hydraulic cylinders 17 and the piston rods 17A of the respective hydraulic cylinders 17 are extended. As the piston rod 17A is extended, each holding member 12 swings around the bolt 10A, and the holding action portion of the holding member 12 is pressed against the outer peripheral surface of the insertion tube portion 2 at the same time. The protruding biting projections 12 a bite into the outer peripheral surface of the insertion tube portion 2, and the first mounting body A is firmly fixed to the insertion tube portion 2.
[0058]
Further, when the piston rod 17A of each hydraulic cylinder 17 continues to extend, the two mounting holders 11 of the first mounting body A, the both clamping members 12 of the clamping mechanism D, and the first holder 20 of the second mounting body B are used. The forcible moving force in the tube drawing direction is applied to the receiving tube portion 1 and the insertion tube portion 2, and the receiving tube portion 1 and the insertion tube portion 2 are drawn and separated (disassembled) along the tube axis X direction. The
[0059]
Therefore, even when the tube axis X of the insertion tube portion 2 is inclined with respect to the tube axis X of the receiving tube portion 1, the receiving port is moved along with the holding operation by the both holding members 12 of the holding mechanism D. The tube wall portion of the insertion tube portion 2 that is farthest from the tube axis X of the tube portion 1 is pressed by one of the holding members 12, and the tube axis X of the receiving tube portion 1 and the tube axis X of the insertion tube portion 2 are pressed. Is automatically corrected in the direction that matches.
[0060]
In addition, since both the clamping members 12 of the clamping mechanism D are clamped and operated by using the moving force imparting operation of both the hydraulic cylinders 17 constituting the tube forced moving mechanism C, the pulling resistance of the connected pipe sections 1 and 2 is pulled out. Against this, the first mounting body A that is externally fitted to the insertion tube portion 2 can be securely fixed and held in place.
[0061]
As shown in FIG. 3, in the case of the anti-bending type pipe joint structure, the engagement body 18 having a short length in the tube axis X direction is attached to the taper screw portion 17a of the hydraulic cylinder 17, and FIG. As shown, in the case of a bendable pipe joint structure, the engagement body 18 having a long length in the tube axis X direction is attached to the taper screw portion 17a of the hydraulic cylinder 17.
[0062]
[Second Embodiment]
FIG. 9 shows a countermeasure when the diameter of the opening end portion 1A of the receiving tube portion 1 varies depending on the type, and the fitting portion 20a of the first holder 20 is detachably fitted from the tube axis direction. One or a plurality of adapters 30A, 30B provided with fitting joints 30a are manufactured, and each of the adapters 30A, 30B is provided in the tube axis direction with respect to the opening end 1A of the receiving pipe part 1 having a different diameter. It is also possible to form a fitting portion 30b that is detachably fitted from the top, and selectively use the adapters 30A and 30B according to the type of the opening end portion 1A of the receiving pipe portion 1.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0063]
[Third Embodiment]
FIG. 10 shows a disassembling function for drawing and separating the connected pipe sections 1 and 2 along the tube axis X direction, and connection for fitting and connecting the pipe sections 1 and 2 from the tube axis X direction. A reversing mechanism capable of selectively applying a moving force in the pipe pulling direction or the pipe connecting direction to both mounting bodies A and B as both hydraulic cylinders 17 of the pipe forced moving mechanism C. The two split holders 11 constituting the first mounting body A are configured to be reversibly mounted on the insertion tube portion 2 and are further provided with hydraulic pressure on each clamping member 12 of the clamping mechanism D. A connecting hole 33 is formed in the engaging body 18 of the cylinder 17 so as to be detachably pivotally connected to the engaging body 18 via a connecting pin 32. With the 17 expansion or contraction operation control, the pipes are drawn on both the wearing bodies A and B. It may be carried out configured to the moving force of the feeder direction or tube connecting direction selectively applied.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0064]
[Fourth Embodiment]
As shown in FIG. 11 (a), the holding action portion of the holding member 12 is configured in an inclined posture or a bending posture in which the protruding amount increases toward one end side in the width direction, and the entire area of the holding action portion. It may be carried out by forming a biting protrusion 12a, and as shown in FIG. 11B, the holding action portion of the holding member 12 has a larger protruding amount toward the center side in the width direction. The tilting posture or the bending posture may be configured, and the biting protrusion 12a may be formed over the entire region of the holding action portion.
Since other configurations are the same as those described in the third embodiment, description thereof is omitted.
[0065]
[Other Embodiments]
(1) In each of the embodiments described above, the pipe forced movement mechanism C is configured using a fluid pressure cylinder such as the hydraulic cylinder 17, but may be configured using another actuator such as a hydraulic motor.
In short, as the tube forced moving mechanism C, any structure may be used as long as it can apply a moving force in the tube pulling direction or the tube connecting direction or both directions to both mounting bodies A and B.
[0066]
(2) In each of the above-described embodiments, the fastener 10 is in a state where the first mounting body A is divided into two in the circumferential direction along the outer peripheral surface of the insertion tube portion 2 and is put on the insertion tube portion 2. The two split holders 11 are detachably tightened and fixed via the two. However, the split holders 11 may be divided into three or more in the circumferential direction along the outer peripheral surface of the insertion tube portion 2.
[0067]
Further, like the second mounting body B, the first mounting body A is concentric with the tube axis X of the insertion tube portion 2 with respect to two locations in the tube axis X direction of the insertion tube portion 2 or You may comprise from the 1st holder and 2nd holder which are exteriorly fixed so that attachment or detachment is possible in a substantially concentric state.
[0068]
(3) In each of the above-described embodiments, the second mounting body B is concentric with the tube axis X of the receiving tube unit 1 with respect to two locations in the tube axis X direction of the receiving tube unit 1 or The first holder 20 and the second holder 21 that are detachably fixed in a substantially concentric state are configured. The second mounting body B is provided at three or more locations in the tube axis X direction of the receiving pipe portion 1. You may comprise so that the external fitting mounting | wearing is possible detachably in the state which controlled the movement in the tube axis X direction with respect to this part.
Further, like the first mounting body A, the second mounting body B is divided into a plurality of parts in the circumferential direction along the outer peripheral surface of the receiving pipe portion 1 and is sheathed on the receiving pipe section 1 It may be constituted by a plurality of split holders that are detachably fastened and fixed via fasteners.
[0069]
(4) As the clamping mechanism D, a plurality of circumferential positions on the outer peripheral surface of the insertion tube portion 2 can be clamped from the outer side in the radial direction in conjunction with the moving force imparting operation of the tube forced movement mechanism C. Any structure can be used.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a joint dismantling device showing a first embodiment of the present invention.
FIG. 2 is a perspective view when mounted on both pipe portions.
FIG. 3 is an enlarged half sectional view of the main part when mounted on a bend prevention type pipe joint structure.
FIG. 4 is a front view of the first holder.
FIG. 5 is a front view of the second holder.
FIG. 6 is a half sectional front view of the first mounting body.
FIG. 7A is an enlarged cross-sectional view of a main part showing a non-clamping state
(B) is an enlarged cross-sectional view of the main part showing the clamping state
FIG. 8 is an enlarged half sectional view of the main part when mounted on a bendable pipe joint structure.
FIG. 9 is an enlarged sectional view of a main part showing a second embodiment of the present invention.
FIG. 10 is an enlarged half cross-sectional view of the main part of the third embodiment of the present invention when mounted on a bend prevention type pipe joint structure;
FIGS. 11A and 11B show a fourth embodiment of the present invention, wherein FIGS. 11A and 11B are enlarged plan views of the clamping members, respectively. FIGS.
FIG. 12 is an exploded perspective view showing a conventional tube desorbing device.
FIG. 13 is an overall perspective view after setting.
[Explanation of symbols]
A 1st wearing body
B 2nd body
C tube forced movement mechanism
D clamping mechanism
X Tube core
1 Receptacle tube
2 Insertion tube
10 Fastener
11 Split holder
11A Connecting flange
12 Clamping member
20 First holder
20a Fitting part
21 Second holder
23 First receiving part
24 Second receiving part

Claims

A first mounting body that is detachably and externally mounted in a state in which movement in the tube axis direction is restricted with respect to an insertion tube portion that is inserted and connected to the receiving tube portion from the tube axis direction; and the receiving tube And a second mounting body that is detachably fitted and attached to a plurality of portions in the tube axis direction of the portion in a state in which movement in the tube axis direction is restricted, and the first mounting body A tube forced moving mechanism is provided between the first mounting body and the second mounting body to apply a moving force in the tube pulling direction or the pipe connecting direction to the both mounting bodies. A gripping mechanism for gripping a plurality of circumferential locations on the outer peripheral surface of the insertion tube portion from the radially outer side in conjunction with the movement force imparting operation of the mechanism is provided , and the second mounting body includes a receiving tube portion Concentric or almost concentric with the tube axis of the receiving tube portion with respect to the two ends of the end portion and the portion spaced from the end portion in the tube axis direction. In a configuration in which the first holder and the second holder is detachably exterior fixing is provided,
Among the first holders, one first receiving part for holding the pipe forced moving mechanism detachably at two positions opposite to each other in the pipe radial direction across the pipe axis of the receiving pipe part In the second holder of the second holder, the pipe forced moving mechanism is detachably held at two positions opposite to each other in the pipe radial direction across the pipe axis of the receiving pipe section. A pipe detaching device in which the other second receiving portion for the laying is provided .

The pipe attachment / detachment device according to claim 1 , wherein the first holder and the second holder are fixedly connected in a state where the attachment interval in the pipe axis direction can be changed to a plurality.

The first mounting body is divided into a plurality in the circumferential direction along the outer peripheral surface of the insertion tube portion, and the plurality of divisions are detachably tightened and fixed via a fastener in a state where the first attachment body is put on the insertion tube portion. The pipe detaching device according to claim 1 or 2 , wherein the pipe detaching device is configured by a holder, and a holding member constituting the holding mechanism is swingably held between the connecting flange portions of the divided holder.

Wherein the first holder, of claims 1 to 3 the fitting portion fitted detachably from the tube axis direction in a concentric or nearly concentric state with respect to the end portion of the receiving pipe section is formed The tube desorption apparatus of any one of Claims.

The tube according to any one of claims 1 to 4 , wherein a plurality of protrusions that can be eaten on an outer peripheral surface of the insertion tube portion are formed in a holding action portion of the plurality of holding members constituting the holding mechanism. Desorption device.

The tube forced movement mechanism includes fluid pressures detachably installed across both receiving portions of the first holder and the second holder that are opposed to each other in the tube axis direction. The pipe detachment device according to any one of claims 1 to 5, further comprising a cylinder.