JP4326075B2

JP4326075B2 - Method of disassembling pipe joint and pipe joint disassembling jig used therefor

Info

Publication number: JP4326075B2
Application number: JP18842699A
Authority: JP
Inventors: 太一佐藤
Original assignee: Waterworks Technology Development Organization Co Ltd
Current assignee: Waterworks Technology Development Organization Co Ltd
Priority date: 1999-07-02
Filing date: 1999-07-02
Publication date: 2009-09-02
Anticipated expiration: 2019-07-02
Also published as: JP2001009752A

Description

【０００１】
【発明の属する技術分野】
本発明は、水道管やガス管等の流体輸送管同士の接続、或いは、流体輸送管と開閉弁の接続管部との接続などに用いられる管継手の解体方法、より詳しくは、不同沈下や地震等に起因する引張力が作用しても、接続された両管部の離脱を強力に阻止することができるように、受口管部の内周面とこれに挿入される挿入管部の外周面との間で圧縮される環状のシール材と、該シール材を通過する位置にまで挿入された挿入管部の外周面先端側の突部に対して管軸芯方向から接当する抜止め状態から前記突部の通過を許容する抜止め解除状態に弾性復元力に抗して拡径側に変位自在な抜止め部材とを介して、両管部を密封状態で抜止め接続してある管継手の解体方法及びそれに用いる解体治具の改良に関する。
【０００２】
【従来の技術】
この種の管継手では、図１〜図４に示すように、前記受口管部１の内周面１ａの管軸芯Ｘ方向二個所に形成された環状溝１ｂ，１ｃに、ゴム等の弾性材料製のシール材３と円周方向の一箇所が切断されたほぼリング状の抜止め部材４とを装着したのち、この受口管部１に対して挿入管部２を挿入することにより、その挿入に連れてシール材３が受口管部１の環状溝１ｂの内周面に押付けられながら拡径側に圧縮変形され、更に、前記抜止め部材４がそれ自体の弾性復元力及びそれの外周側に配置した芯合わせ用弾性リング５の弾性復元力に抗して抜止め解除状態にまで拡径側に変位され、挿入管部２の突部６が通過した時点で、抜止め解除状態にある抜止め部材４が弾性復元力で抜止め状態に縮径する。
それ故に、受口管部１に対して挿入管部２を挿入するだけで、両管部１，２を密封状態で抜止め接続することができるばかりでなく、不同沈下や地震等に起因する引張力が作用しても、図４に示すように、挿入管部２の突部６と受口管部１の環状溝１ｃに保持された抜止め部材４とが管軸芯Ｘ方向から接当して、受口管部１と挿入管部２との離脱を強力に阻止することができる利点を有するものの、前記シール材３及び抜止め部材４が、受口管部１の内周面１ａと挿入管部２の外周面２ａとの間で囲繞されているため、保守点検や部品取替え等のために分解する必要が生じたとき、或いは、管継手を組付け直す必要が生じたとき、両管部１，２の接続を外部から容易に解除できるようにすることが要望されている。
そこで、従来では、図１８、図１９に示すように、受口管部１の内周面１ａと挿入管部２の外周面２ａとの間に管軸芯Ｘ方向から差し込み可能で、かつ、挿入管部２の突部６の径方向での突出代と同一寸法の厚みに形成された解体筒５０を、円周方向で三つに分割された円弧状の分割解体板５０Ａから構成するとともに、各分割解体板５０Ａの基端部には、半径方向外方に突出する外力受け部５１を固着していた。
そして、挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けられた各分割解体板５０Ａを、それの外力受け部５１をハンマー等で打撃しながら、シール材３の内周面と挿入管部２の外周面２ａとの間、及び、抜止め部材４の内周面と挿入管部２の外周面２ａとの間に挿入移動させ、抜止め部材４を抜止め解除状態に拡径側に変位させた状態で両管部１，２を相対離脱移動させて接続を解除していた（例えば、特開平１１−１０４９７２号公報参照）。
【０００３】
【発明が解決しようとする課題】
従来の管継手解体方法では、挿入管部２の外周面２ａに沿った幅の広い円弧状の分割解体板５０Ａを用いるため、挿入管部２の外周面２ａに対して密着状態にあるシール材３の拡径側への圧縮変形、及び、挿入管部２の外周面２ａに対して密着状態にある抜止め部材４の拡径側への弾性変形に多くの労力を要し、特に、長期使用によってシール材３が挿入管部２の外周面２ａに融着している場合では、このシール材３の剥離自体に多大の労力を要する。
しかも、各分割解体板５０Ａの外力受け部５１をハンマー等で打撃するため、労力を要する割りに分割解体板５０Ａの打ち込み効率が悪く、特に、その打ち込み箇所が空間的に制約を受ける場合では、打撃ミスの発生が増加して、打ち込み効率の低下を招来し易い。
【０００４】
本発明は、上述の実状に鑑みて為されたものであって、その第１の課題は、保守点検や部品取替え等のために管継手を分解する必要が生じたとき、両管部の接続を外部から少ない労力で能率良く容易に解除することのできる管継手の解体方法を提供する点にあり、第２の主たる課題は、解体板の挿入作業をより少ない労力で効率良く行うことができる取扱いの容易な管継手用解体治具を提供する点にある。
【０００５】
【課題を解決するための手段】
本発明の請求項１による管継手の解体方法の特徴構成は、冒記した構成において、前記抜止め部材を抜止め解除状態に拡径変位させることが可能な厚みを備え、かつ、先端が先鋭状に形成され、更に、少なくとも前記受口管部の内周面に相対向する表面に滑剤を保持する滑剤保持溝が幅方向中央側ほど基端部側に偏位する状態に屈曲形成されて構成されている複数の細幅平板状の解体板を準備し、挿入管部の外周面に管軸芯方向に沿って当て付けられた各解体板を、加振装置で振動を付与しながらシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間に挿入移動させる点にある。
上記特徴構成によれば、先端が先鋭状に形成された複数の細幅平板状の解体板を用いるから、例え、長期使用によってシール材が挿入管部の外周面に密着している場合でも、このシール材の剥離に要する力が少なくて済み、しかも、解体板に対して加振装置で振動を付与しながら挿入移動させるから、この解体板を、シール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間にスムースに挿入移動させることができる。
従って、従来の解体方法に比して、解体板の挿入本数が増加するものの、一本当りの挿入移動時間及び挿入移動に要する労力が少なくなるから、保守点検や部品取替え等のための管継手の解体作業を少ない労力で能率良く容易に行うことができる。
また、少なくとも受口管部の内周面に相対向する解体板の表面の溝に保持された滑剤により、該解体板を、密着状態にあるシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間によりスムースに挿入移動させることができ、しかも、挿入された解体板によって抜止め部材を抜止め解除状態に保持したまま両管部を管軸芯方向に沿って相対離脱移動させる際にも、シール材の内周面と解体板の外側面との間に滑材が存在するから、両管部の離脱作業を少ない労力で容易に行うことができる。両管部間への解体板の挿入移動に連れて、該解体板の表面の滑剤保持溝に保持された滑剤が次第に幅方向中央側に寄せられるから、滑材が解体板の幅方向外方に流出することに起因する挿入抵抗の増大を抑制することができる。
【０００６】
本発明の請求項２による管継手用解体治具の特徴構成は、受口管部の内周面とこれに挿入される挿入管部の外周面との間で圧縮される環状のシール材と、該シール材を通過する位置にまで挿入された挿入管部の外周面先端側の突部に対して管軸芯方向から接当する抜止め状態から前記突部の通過を許容する抜止め解除状態に弾性復元力に抗して拡径側に変位自在な抜止め部材とを介して、両管部を密封状態で抜止め接続してある管継手の解体方法に用いられる管継手用解体治具であって、
前記抜止め部材を抜止め解除状態に拡径変位させることが可能な厚みを備え、かつ、先端が先鋭状に形成された複数の細幅平板状の解体板と、挿入管部の外周面に管軸芯方向に沿って当て付けられた各解体板に振動を付与しながら、前記解体板をシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間に挿入移動させる加振装置と、前記解体板の基端部側と加振装置の加振体との相対向する部位には、これら両者を解体板に振動を付与する状態で脱着自在に係合する係合手段とが設けられ、少なくとも前記受口管部の内周面に相対向する前記解体板の表面に、滑剤を保持する滑剤保持溝が前記解体板の幅方向中央側ほど基端部側に偏位する状態に屈曲形成されて構成されている点にある。
上記特徴構成によれば、先端が先鋭状に形成された複数の細幅平板状の解体板を用いるから、例え、長期使用によってシール材が挿入管部の外周面に密着している場合でも、このシール材の剥離に要する力が少なくて済み、しかも、解体板に対して加振装置で振動を付与しながら挿入移動させるから、この解体板を、シール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間にスムースに挿入移動させることができる。従って、解体板の挿入本数が増加するものの、一本当りの挿入移動時間及び挿入移動に要する労力が少なくなるから、保守点検や部品取替え等のための管継手の解体作業を少ない労力で能率良く容易に行うことができる。
また、前記解体板の基端部と加振装置の加振体とを係合手段を介して係合させることにより、加振装置をラフに取り扱いながらも解体板の挿入作業途中での加振体の外れを抑制することができる。
従って、解体板の挿入作業をより少ない労力で効率良く行うことができるとともに、解体板の挿入作業時における取り扱いの容易化を図ることができる。
さらに、少なくとも受口管部の内周面に相対向する解体板の表面の溝に保持された滑剤により、該解体板を、密着状態にあるシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間によりスムースに挿入移動させることができ、しかも、挿入された解体板によって抜止め部材を抜止め解除状態に保持したまま両管部を管軸芯方向に沿って相対離脱移動させる際にも、シール材の内周面と解体板の外側面との間に滑材が存在するから、両管部の離脱作業を少ない労力で容易に行うことができる。両管部間への解体板の挿入移動に連れて、該解体板の表面の滑剤保持溝に保持された滑剤が次第に幅方向中央側に寄せられるから、滑材が解体板の幅方向外方に流出することに起因する挿入抵抗の増大を抑制することができる。
本発明の請求項３による管継手用解体治具の特徴構成は、前記解体板の前記表面及び裏面の各々には、前記滑剤保持溝が前記解体板の幅方向中央側ほど基端部側に偏位する状態に屈曲形成されて構成されている点にある。
本特徴構成によれば、前記解体板の表裏の溝に保持された滑剤により、該解体板を、密着状態にあるシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間によりスムースに挿入移動させることができ、しかも、挿入された解体板によって抜止め部材を抜止め解除状態に保持したまま両管部を管軸芯方向に沿って相対離脱移動させる際にも、シール材の内周面と解体板の外側面との間に滑材が存在するから、両管部の離脱作業を少ない労力で容易に行うことができる。また、前記両管部間への解体板の挿入移動に連れて、該解体板の表裏の滑剤保持溝に保持された滑剤が次第に幅方向中央側に寄せられるから、滑材が解体板の幅方向外方に流出することに起因する挿入抵抗の増大を抑制することができる。
【０００７】
本発明の請求項４による管継手用解体治具の特徴構成は、前記解体板の基端部と加振装置の加振体との相対向する部位に、前記係合手段が係合状態にあるとき、解体板の幅方向での該解体板と加振体との相対揺動を規制する揺動規制手段が設けられている点にある。
上記特徴構成によれば、解体板の挿入作業時において、加振装置の加振体で解体板を加振しながら押し込み操作する際、解体板が加振体に対して幅方向に振ら付くことを前記揺動規制手段によって抑制することができる。
従って、解体板を管軸芯方向に沿って押し込む際の直進性を向上することができるから、解体板の挿入作業の能率化を促進することができる。
【０００８】
本発明の請求項５による管継手用解体治具の特徴構成は、前記解体板の先端部には、挿入管部の外周面と接触する板面に対して鋭角に交差する傾斜面が形成されている点にある。
上記特徴構成によれば、前記解体板の先端部に形成された鋭角な傾斜面により、密着状態にあるシール材の内周面と挿入管部の外周面との間、及び、抜止め部材の内周面と挿入管部の外周面との間にスムースに挿入移動させることができ、解体板の挿入作業能率の向上を図ることができる。
【０００９】
本発明の請求項６による管継手用解体治具の特徴構成は、前記解体板の基端部が、挿入管部の外周面から離間する側に折り曲げ形成され、更に、前記係合手段が前記解体板の基端部と加振装置の加振体との相対向する部位に形成された嵌合自在な係合凸部と係合凹部とから構成されている点にある。
上記特徴構成によれば、解体板の基端部が折曲げ形成されているから、解体板の挿入移動時における挿入管部の外周面の損傷を抑制することができる。加えて、解体板の挿入作業時に、解体板の基端部側と加振装置の加振体との相対向する部位に形成された係合凸部と係合凹部とを嵌合させるから、解体板の挿入作業途中での加振体の外れを抑制しながら、加振体から解体板へ確実に振動を付与することができ、しかも、解体板の基端部側と加振体との相対向する部位に係合凸部と係合凹部とを形成するだけで済むから、構造の簡素化と製造コストの低廉化を図りながら解体板の挿入作業を効率良く行うことができる。
【００１３】
【発明の実施の形態】
〔第１実施形態〕
図１〜図１０は、水道管やガス管等の複数本の流体輸送管Ｐのうち、接続対象となる一方の流体輸送管Ｐの一端部側に形成された受口管部１と、他方の流体輸送管Ｐの他端部側に形成された挿入管部２とを管軸芯Ｘ方向から密封状態で抜止め接続する管継手を示し、これは、前記受口管部１の内周面１ａで、かつ、それの管軸芯Ｘ方向に所定間隔を隔てた二個所に形成された環状溝１ｂ，１ｃのうち、前記受口管部１の開口側に位置する環状溝１ｂ内に、前記挿入管部２の外周面２ａとの間を密封するゴム等の弾性材料製の環状シール材３を、前記挿入管部２の外周面２ａとの間で圧縮される状態で装着するとともに、前記受口管部１の奥側に位置する環状溝１ｃ内には、円周方向の一箇所が切断されたほぼリング状の抜止め部材４と、該抜止め部材４をそれの軸芯が受口管部１の管軸芯Ｘと合致又はほぼ合致する位置に保持する機能及び抜止め部材４の抜止め解除状態への拡径側への弾性変形を許容する機能を備えた弾性材料製の芯合わせ用リング５とを装着してある。
【００１４】
また、前記挿入管部２の外周面２ａの先端部には、抜止め状態にある抜止め部材４に対して管軸芯Ｘ方向から接当可能な状態で半径方向外方に突出する環状の突部６を形成するとともに、前記環状突部６の挿入移動方向上手側には、図２に示すように、挿入管部２の挿入移動に連れて、抜止め状態にある抜止め部材４をそれの弾性復元力及びそれの外周側に配置した芯合わせ用リング５の弾性復元力に抗して抜止め解除状態にまで拡径側に変位（弾性変形）させるカム面６ａを形成してある。
【００１５】
そして、前記受口管部１に対して挿入管部２を管軸芯Ｘ方向から挿入することにより、その挿入移動に連れてシール材３が受口管部１の環状溝１ｂの内周面に押付けられながら拡径側に圧縮変形され、更に、前記抜止め部材４がそれ自体の弾性復元力及び芯合わせ用弾性リング５の弾性復元力に抗して抜止め解除状態にまで拡径側に変位され、挿入管部２の突部６が通過した時点で、抜止め解除状態にある抜止め部材４が弾性復元力で抜止め状態に縮径する。
【００１６】
それ故に、前記受口管部１に対して挿入管部２を挿入するだけで、両管部１，２を密封状態で抜止め接続することができるばかりでなく、不同沈下や地震等に起因する引張力が作用しても、図４に示すように、挿入管部２の環状突部６と受口管部１の環状溝１ｃに保持された抜止め部材４とが管軸芯Ｘ方向から接当して、受口管部１と挿入管部２との離脱を強力に阻止することができる。
【００１７】
次に、上述の如く構成された管継手の解体方法及びそれに用いられる解体治具について説明する。
まず、前記抜止め部材４を抜止め解除状態に拡径変位させることが可能な厚みを備え、かつ、先端が先鋭状に形成された複数の細幅平板状（細幅帯状）の解体板７を準備する。
この解体板７は、細幅の平板状（例えば、長さ３００ｍｍ、幅１０ｍｍ、厚み３ｍｍ）に形成されたステンレス鋼等の金属製で、その長手方向の一端側である先端部には、挿入管部２の外周面２ａと接触する板面（裏面でもある）７ｂに対して鋭角に交差する傾斜面７ｄが形成されているとともに、加振装置Ａの加振体の一例で、前記解体板７に対して軸線方向の周期的な衝撃力（振動）を付与する打撃軸１０と、前記解体板７の長手方向の他端側となる基端部側との相対向する部位には、これら両者１０，７を解体板７に振動を付与する状態で脱着自在に係合する係合手段Ｂが設けられている。
更に、前記解体板７の表裏両面７ａ，７ｂの各々には、滑剤を保持可能な多数の滑剤保持溝９が、解体板７の幅方向中央側ほど基端部側に偏位する状態に屈曲（当該実施形態ではＶの字状）させて形成されているとともに、前記解体板７の基端部７ｅが、挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けたとき、該挿入管部２の外周面２ａから離間する側に所定角度（当該実施形態では９０度の角度範囲）で弧状に折り曲げ形成されている。
【００１８】
前記係合手段Ｂは、解体板７の折曲げ基端部７ｅに、解体板７の長手方向に沿う丸孔状の係止孔（係合凹部の一例）８ｊを貫通形成するとともに、前記打撃軸１０の先端部に、前記解体板７の係止孔８ｊに対して係脱自在に嵌合する円柱状の係合部（係合凸部の一例）１０ｈを形成して構成されている。
また、前記折曲げ基端部７ｅの係止孔８ｊに打撃軸１０の係合部１０ｈを嵌合させた状態では、解体板７の幅方向での該解体板７と打撃軸１０との相対揺動を規制することができるから、前記係合手段Ｂの係止孔８ｊと係合部１０ｈとをもって、前記係合手段Ｂが係合状態にあるとき、その係合箇所をほぼ揺動支点とする解体板７の幅方向での該解体板７と打撃軸１０との相対揺動を規制する揺動規制手段Ｃが兼用構成されている。
そして、前記解体板７の折曲げ基端部７ｅに形成された係止孔８ｊに、前記打撃軸１０の先端部の係合部１０ｈを背面側から嵌合させることにより、解体板７に対してそれの先端側への振動（周期的な衝撃力）を付与し、前記折曲げ基端部７ｅの係止孔８ｊに、前記打撃軸１０の先端部の係合部１０ｈを前面側から嵌合させることにより、解体板７に対してそれの基端側への振動（周期的な衝撃力）を付与するように構成してある。
つまり、前記折曲げ基端部７ｅの背面が、解体板７の先端側への振動を受け止める振動受け部（衝撃受け部又は外力受け部）に構成されているとともに、前記折曲げ基端部７ｅの前面が、解体板７の基端側への振動を受け止める振動受け部（衝撃受け部又は外力受け部）に構成されている。
【００１９】
それ故に、解体板７の挿入作業途中での打撃軸１０の外れを抑制しながら、打撃軸１０から解体板７へ確実に振動を付与することができ、しかも、解体板７の折曲げ基端部７ｅと打撃軸１０との相対向する部位に係止孔８ｊと係合部１０ｈとを形成するだけで済むから、構造の簡素化と製造コストの低廉化を図りながら解体板７の挿入作業を効率良く行うことができるのである。
【００２０】
そして、上述の如く構成された複数本の解体板７を、挿入管部２の外周面２ａの周方向複数箇所に順次管軸芯Ｘ方向に沿って当て付け、この当て付けられた解体板７を、加振装置Ａで振動（周期的な衝撃力）を付与しながらシール材３の内周面と挿入管部２の外周面２ａとの間、及び、抜止め部材４の内周面と挿入管部２の外周面２ａとの間に挿入移動させる。この解体板７の挿入移動に連れて、該解体板７の先端部に形成された鋭角な傾斜面７ｄにより、挿入管部２の外周面２ａに密着又は融着状態にある環状シール材３が、受口管部１の環状溝１ｂ内周面側に押付けられながら拡径側に圧縮変形されて、挿入管部２の外周面２ａから遊離又は剥離されるとともに、前記抜止め部材４がそれ自体の弾性復元力及び芯合わせ用弾性リング５の弾性復元力に抗して抜止め解除状態にまで拡径側に変位され、その抜止め解除状態が維持される。この状態で受口管部１と挿入管部２とを管軸芯Ｘ方向に沿って相対離脱移動させ、両管部１，２の嵌合接続を解除する。
【００２１】
また、前記挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けられた解体板７を、加振装置Ａで振動（周期的な衝撃力）を付与しながらシール材３の内周面と挿入管部２の外周面２ａとの間、及び、抜止め部材４の内周面と挿入管部２の外周面２ａとの間に挿入移動させる際、解体板７の裏面７ｂが挿入管部２の外周面２ａに強く押付けられるが、このとき、前記解体板７の基端部７ｅが弧状に折り曲げ形成されているため、該解体板７による挿入管部２の外周面２ａの損傷を抑制することができる。
【００２２】
図９は、前記加振装置Ａの一例である携帯式の打撃具を示し、ハウジング１５内に、前記打撃軸１０を脱着並びに一定範囲内で軸線方向に摺動自在に保持する装着部１６備えたスピンドル１７と、電動モータ１８とを設けるととに、前記スピンドル１７内には、電動モータ１８の駆動軸１８ａに止着された偏芯回転体１９に連動して軸線方向に往復摺動する励起ピストン２０と、励起ピストン２０によって加速される飛翔ピストン２１と、該飛翔ピストン２１との衝突によって生じた衝撃力を打撃軸１０に加える打撃子２２とを設けて構成してある。
そして、前記抜止め部材４を抜止め解除状態に拡径変位させることが可能な厚みを備え、かつ、先端が先鋭状に形成された複数の細幅平板状の解体板７と、挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けられた解体板７に振動を付与しながら該解体板７をシール材３の内周面と挿入管部２の外周面２ａとの間、及び、抜止め部材４の内周面と挿入管部２の外周面２ａとの間に挿入移動させ加振装置Ａとをもって管継手用解体治具が構成されている。
【００２３】
〔第２実施形態〕
図１１は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂを設けるとともに、前記係合手段Ｂを、解体板７の先端側への振動（周期的な衝撃力）及び基端側への振動を受け止め得る状態で解体板７の基端部側の表面に固着されたピン状の係合受け部８ａと、前記解体板７の係合受け部８ａに対して係脱自在な状態で打撃軸１０の先端部に形成された半円状の係合部１０ａとから構成し、更に、前記解体板７の基端部７ｅを、挿入管部２の外周面２ａから離間する側に弧状に折り曲げ形成してある。
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、それの説明は省略する。
【００２４】
〔第３実施形態〕
図１２は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂを設けるとともに、前記係合手段Ｂを、解体板７の先端側への振動（周期的な衝撃力）及び基端側への振動を受け止め得る状態で解体板７の基端部を逆Ｕの字状に折り曲げ形成された湾曲突起部８ｂと、前記解体板７の湾曲突起部８ｂに対して外嵌自在な状態で打撃軸１０の先端部に形成されたコの字状の係合部１０ｂとから構成し、更に、前記解体板７の基端部７ｅを、挿入管部２の外周面２ａから離間する側に弧状に折り曲げ形成してある。
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、それの説明は省略する。
【００２５】
〔第４実施形態〕
図１３は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂと、前記係合手段Ｂが係合状態にあるとき、その係合箇所をほぼ揺動支点とする解体板７の幅方向での該解体板７と打撃軸１０との相対揺動を規制する揺動規制手段Ｃとを設けるとともに、前記解体板７の基端部７ｅを、挿入管部２の外周面２ａから離間する側に弧状に折り曲げ形成してある。
前記係合手段Ｂは、解体板７の基端部側の表面に、解体板７の先端側への振動（周期的な衝撃力）及び基端側への振動を受け止めるピン状の突起部８ｃを固着し、この突起部８ｃの両側脇の各々には、係止溝部８ｄを切り欠き形成するとともに、前記打撃軸１０の先端部には、前記解体板７のピン状突起部８ｃに対して係脱自在に嵌合する係合孔１０cと、解体板７の両係止溝部８ｄに板厚方向から嵌合する係合突起１０ｄとを形成して構成されている。
前記揺動規制手段Ｃは、係合手段Ｂを構成する解体板７側の一対の係止溝部８ｄと、打撃軸１０側の一対の係合突起１０ｄとをもって兼用構成されている。
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、それの説明は省略する。
【００２６】
〔第５実施形態〕
図１４は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂと、前記係合手段Ｂが係合状態にあるとき、その係合箇所をほぼ揺動支点とする解体板７の幅方向での該解体板７と打撃軸１０との相対揺動を規制する揺動規制手段Ｃとを設けるとともに、前記解体板７の基端部７ｅを、挿入管部２の外周面２ａから離間する側に９０度の角度で弧状に折り曲げ形成してある。
前記係合手段Ｂは、解体板７の基端部の表面に、解体板７の先端側への加振力（周期的な衝撃力）及び基端側への加振力を受け止め可能な突条部８ｅを、解体板７の長手方向に沿って打出し形成し、この突条部８ｅの両側脇の各々には、係止溝部８ｆを切欠き形成するとともに、前記打撃軸１０の先端部には、前記解体板７の突条部８ｅに対して外嵌状態で係脱自在に係合する係合溝１０ｅと、解体板７の両係止溝部８ｆに嵌合する係合突起１０ｆとを形成して構成してある。
前記揺動規制手段Ｃは、係合手段Ｂを構成する解体板７側の突条部８ｅ及び一対の係止溝部８ｆと、打撃軸１０側の係合溝１０ｅ及び一対の係合突起１０ｆとをもって兼用構成されている。
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、それの説明は省略する。
【００２７】
〔第６実施形態〕
図１５は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂを設けるとともに、前記解体板７の基端部７ｅを、挿入管部２の外周面２ａから離間する側に９０度の角度で弧状に折り曲げ形成してある。
前記係合手段Ｂは、解体板７の基端部に、解体板７の先端側への振動（周期的な衝撃力）及び基端側への振動を受け止める丸状の係止孔（係合凹部の一例）８ｇ又は角状の係止孔（係合凹部の一例）８ｈを貫通形成するとともに、前記打撃軸１０の先端部に、前記解体板７の丸状係止孔８ｇ又は角状係止孔８ｈに対して係脱自在に嵌合するピン状の係合部（係合凸部の一例）１０ｇを形成して構成されている。
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、それの説明は省略する。
【００２８】
〔第７実施形態〕
図１６は、管継手用解体治具の別実施形態を示し、これは、加振装置Ａの打撃軸１０と解体板７の基端部側との相対向する部位に、解体板７に振動を付与する状態で両者１０，７を脱着自在に係合する係合手段Ｂを設けてある。
また、前記解体板７の長手方向の基端部側に偏位した部位には、先端部側と基端部側とで９０度位相が異なるように捻り部７Ａが形成されていて、該解体板７を挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けた状態では、捻り部７Ａよりも先端部側の解体板部分７Ｂが、挿入管部２の接線方向にほぼ沿う横向き姿勢となり、かつ、捻り部７Ａよりも基端部側の解体板部分７Ｃが、挿入管部２の管軸芯Ｘを通る仮想平面（直径方向）に沿った縦向き姿勢となるように構成されている。
前記係合手段Ｂは、解体板７の基端部側解体板部分７Ｃの両側辺のうち、挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けたとき、半径方向外方に位置する一方の側辺に、凹状の係合受け部８を切欠き形成するとともに、前記打撃軸１０の先端部には、前記凹状の係合受け部８に係合自在な半円状の係合部１０ａを切欠き形成して構成されている。
そして、前記凹状の係合受け部８内の先端側角部に、前記打撃軸１０の先端部の係合部１０ａを押し当てることにより、解体板７に対してそれの先端側への振動（周期的な衝撃力）を付与し、前記係合受け部８内の基端側角部に、前記打撃軸１０の先端部の係合部１０ａを押し当てることにより、解体板７に対してそれの基端側への振動（周期的な衝撃力）を付与するように構成してある。
【００２９】
更に、前記解体板７に形成した捻り部７Ａにより、基端部側解体板部分７Ｃの両側辺が先端部側の解体板部分７Ｂの表裏両面７ａ，７ｂよりも突出するから、挿入管部２の外周面２ａに管軸芯Ｘ方向に沿って当て付けたとき、解体板７全体が傾斜姿勢になってそれの先鋭な先端が挿入管部２の外周面に接触することになる。
つまり、前記捻り部７Ａをもって、前記挿入管部２の外周面に管軸芯Ｘ方向に沿って当て付けたとき、解体板７の先鋭な先端を挿入管部２の外周面に強制的に接触させる強制接触手段が構成されている。
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、それの説明は省略する。
【００３０】
〔第８実施形態〕
図１７は、管継手用解体治具の別実施形態を示し、これは、前記解体板７の長手方向の一端側である先端部には、挿入管部２の外周面２ａと接触する板面（裏面でもある）７ｂに対して鋭角に交差する傾斜面７ｄを形成するとともに、該先端部を、先端側ほど細幅となるテーパー状に形成してある。
それ故に、解体板７の先端部が、先端側ほど薄肉で細幅となる先鋭状に構成されているため、長期使用に連れてシール材３が硬化している場合でも、シール材３の内周面と挿入管部２の外周面２ａとの間に少ない労力でスムースに挿入移動させることができる。
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、それの説明は省略する。
【００３１】
〔その他の実施形態〕
（１）上述の各実施形態では、前記加振装置Ａとして、電動モータ１８を駆動源とするものを例に挙げて説明したが、圧縮空気を駆動源とするものを用いて実施してもよい。
要するに、前記加振装置Ａとしては、振動（軸線方向の周期的な衝撃力）を加振体（打撃軸）に与えることのできるものであれば、如何なる構造のものを用いて実施してもよい。
（２）上述の各実施形態では、前記解体板７の表裏両面７ａ，７ｂの各々に、滑剤を保持する多数の滑剤保持溝９を形成したが、少なくとも受口管部１の内周面１ａに相対向する解体板７の表面７ａに滑剤保持溝９を形成してあればよい。
（３）上述の各実施形態では、前記解体板７の多数の滑剤保持溝９を、幅方向中央側ほど基端部側に偏位するＶの字状に形成したが、この滑剤保持溝９を、Ｗ字状等に形成してもよい。
（４）上述の各実施形態では、接続対象となる一方の流体輸送管Ｐの一端部側に形成された受口管部１と、他方の流体輸送管Ｐの他端部側に形成された挿入管部２とを管軸芯Ｘ方向から密封状態で抜止め接続する管継手を例に挙げて説明したが、流体輸送管Ｐと開閉弁の接続管部とを嵌合接続する管継手であってもよく、また、他の流体機器の管部同士を嵌合接続する管継手であってもよい。
（５）上述の各実施形態では、前記抜止め部材４の外周側に、該抜止め部材４をそれの軸芯が受口管部１の管軸芯Ｘと合致又はほぼ合致する位置に保持する機能及び抜止め部材４の抜止め解除状態への拡径側への弾性変形を許容する機能を備えた弾性材料製の芯合わせ用リング５を装着したが、この芯合わせ用リング５を省略して実施してもよい。
また、上述の各実施形態では、前記抜止め部材４、円周方向の一箇所が切断されたほぼリング状に構成したが、この抜止め部材４を、周方向で複数に分割するとともに、各分割抜止め部材４を、シール材３を通過する位置にまで挿入された挿入管部２の外周面先端側の突部６に対して管軸芯Ｘ方向から接当する抜止め状態から前記突部６の通過を許容する抜止め解除状態に弾性復元力に抗して拡径側に変位自在に構成して実施してもよい。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す両管部の接続直前の縦断面図
【図２】両管部の接続途中の縦断面図
【図３】両管部の接続完了時の縦断面図
【図４】両管部に引張力が作用したときの縦断面図
【図５】解体板の挿入途中の縦断面図
【図６】解体板の挿入終了時の縦断面図
【図７】両管部の離脱移動途中の縦断面図
【図８】両管部の離脱完了時の縦断面図
【図９】加振装置の概略一部切欠図
【図１０】解体板と打撃軸の一部の斜視図
【図１１】本発明の第２実施形態を示す解体治具の要部の斜視図
【図１２】本発明の第３実施形態を示す解体治具の要部の斜視図
【図１３】本発明の第４実施形態を示す解体治具の要部の斜視図
【図１４】本発明の第５実施形態を示す解体治具の要部の斜視図
【図１５】本発明の第６実施形態を示す解体治具の要部の斜視図
【図１６】本発明の第７実施形態を示す解体治具の要部の斜視図
【図１７】本発明の第８実施形態を示す解体板の要部の斜視図
【図１８】従来の管継手の解体方法を示す縦断面図
【図１９】従来の管継手の解体方法を示す横断面図
【符号の説明】
Ａ加振装置
Ｂ係合手段
Ｃ揺動規制手段
Ｘ管軸芯
１受口管部
１ａ内周面
１ｂ環状溝
１ｃ環状溝
２挿入管部
２ａ外周面
３シール材
４抜止め部材
６突部
７解体板
８係合受け部
９滑剤保持溝
１０加振体（打撃軸）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for disassembling a pipe joint used for connection between fluid transport pipes such as water pipes and gas pipes, or connection between a fluid transport pipe and a connection pipe portion of an on-off valve, and more specifically, Even if a tensile force due to an earthquake or the like is applied, the inner peripheral surface of the receiving pipe part and the insertion pipe part inserted into the receiving pipe part can be strongly prevented from detaching from both connected pipe parts. An annular sealing material that is compressed between the outer peripheral surface and a protrusion that comes into contact with the protrusion on the distal end side of the outer peripheral surface of the insertion tube portion that is inserted to a position that passes through the sealing material from the tube axis direction. Both pipes are secured and connected in a sealed state via a retaining member that is displaceable to the enlarged diameter side against the elastic restoring force from the retaining state to the retaining release state that allows the protrusion to pass. The present invention relates to a method of disassembling a pipe joint and improvement of a dismantling jig used therefor.
[0002]
[Prior art]
In this type of pipe joint, as shown in FIGS. 1 to 4, rubber or the like is formed in the annular grooves 1 b and 1 c formed at two locations in the pipe axis X direction on the inner peripheral surface 1 a of the receiving pipe portion 1. By attaching the sealing material 3 made of an elastic material and a substantially ring-shaped retaining member 4 cut at one circumferential direction, and then inserting the insertion tube portion 2 into the receiving tube portion 1 With the insertion, the sealing material 3 is compressed and deformed to the enlarged diameter side while being pressed against the inner peripheral surface of the annular groove 1b of the receiving pipe portion 1, and the retaining member 4 has its own elastic restoring force and At the time when the protrusion 6 of the insertion tube portion 2 has passed through the diameter expansion side until it is displaced to the unlocking release state against the elastic restoring force of the centering elastic ring 5 arranged on the outer peripheral side thereof The retaining member 4 in the released state is reduced in diameter to the retained state by an elastic restoring force.
Therefore, by simply inserting the insertion tube portion 2 into the receiving tube portion 1, not only can both the tube portions 1 and 2 be secured and connected in a sealed state, but also due to non-uniform subsidence or earthquakes. Even if a tensile force acts, as shown in FIG. 4, the protrusion 6 of the insertion tube portion 2 and the retaining member 4 held in the annular groove 1c of the receiving tube portion 1 are in contact with each other from the tube axis X direction. In this case, the sealing material 3 and the retaining member 4 are provided on the inner peripheral surface of the receiving pipe portion 1, although there is an advantage that the separation between the receiving pipe portion 1 and the insertion pipe portion 2 can be strongly prevented. 1a and the outer peripheral surface 2a of the insertion tube portion 2 are enclosed, so that when it becomes necessary to disassemble for maintenance inspection or parts replacement, or when it is necessary to reassemble the pipe joint Therefore, it is desired that the connection between the pipe portions 1 and 2 can be easily released from the outside.
Therefore, conventionally, as shown in FIGS. 18 and 19, it can be inserted from the tube axis X direction between the inner peripheral surface 1 a of the receiving tube portion 1 and the outer peripheral surface 2 a of the insertion tube portion 2, and A disassembly cylinder 50 formed to have the same thickness as the protrusion allowance in the radial direction of the protrusion 6 of the insertion tube portion 2 is composed of an arc-shaped divided dismantling plate 50A divided into three in the circumferential direction. The external force receiving portion 51 protruding outward in the radial direction is fixed to the base end portion of each divided dismantling plate 50A.
Then, each split dismantling plate 50A applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction is hit with the external force receiving portion 51 with a hammer or the like while the inner periphery of the sealing material 3 is Inserted and moved between the outer surface 2a of the insertion tube portion 2 and between the inner peripheral surface of the retaining member 4 and the outer peripheral surface 2a of the insertion tube portion 2 to release the retaining member 4 from the retaining state. In a state where the pipe portions 1 and 2 are displaced to the diameter-expanding side, the two pipe portions 1 and 2 are moved relative to each other to release the connection (see, for example, JP-A-11-104972).
[0003]
[Problems to be solved by the invention]
In the conventional pipe joint disassembling method, since the wide arc-shaped divided dismantling plate 50A along the outer peripheral surface 2a of the insertion pipe portion 2 is used, the sealing material in close contact with the outer peripheral surface 2a of the insertion pipe portion 2 is used. 3 requires a large amount of labor for compressive deformation to the expanded diameter side and elastic deformation to the expanded diameter side of the retaining member 4 that is in close contact with the outer peripheral surface 2a of the insertion tube portion 2. When the sealing material 3 is fused to the outer peripheral surface 2a of the insertion tube portion 2 by use, a great deal of labor is required for peeling the sealing material 3 itself.
Moreover, since the external force receiving portion 51 of each divided demolition plate 50A is struck with a hammer or the like, the efficiency of driving the divided demolition plate 50A is poor while requiring labor, and in particular, when the driving location is spatially restricted, The occurrence of hitting mistakes increases and the driving efficiency tends to decrease.
[0004]
The present invention has been made in view of the above circumstances, and the first problem is that when it is necessary to disassemble the pipe joint for maintenance inspection, parts replacement, etc., the connection of both pipe portions The second main problem is that the work of inserting the dismantling plate can be performed efficiently with less effort. It is in providing a disassembly jig for a pipe joint that is easy to handle.
[0005]
[Means for Solving the Problems]
  The characteristic structure of the pipe joint disassembling method according to claim 1 of the present invention is the structure described in the opening paragraph, wherein the retaining member has a thickness capable of expanding and displacing the retaining member in a retaining release state, and has a sharp tip. Formed into a shapeFurthermore, at least the lubricant holding groove for holding the lubricant on the surface opposite to the inner peripheral surface of the receiving pipe portion is bent and formed so as to be displaced toward the base end side toward the center in the width direction.Prepare a plurality of narrow flat plate disassembly plates, and apply each disassembly plate applied to the outer peripheral surface of the insertion tube section along the tube axis direction while applying vibration with a vibration device. This is in the point of insertion and movement between the surface and the outer peripheral surface of the insertion tube portion and between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion.
  According to the above-mentioned characteristic configuration, since a plurality of narrow flat plate-shaped dismantling plates formed with sharp tips are used, for example, even when the sealing material is in close contact with the outer peripheral surface of the insertion tube portion due to long-term use, The force required to peel off the seal material is small, and the disassembly plate is inserted and moved while applying vibration to the disassembly plate with a vibration device. Therefore, the disassembly plate is connected to the inner peripheral surface of the seal material and the insertion tube portion. It can be smoothly inserted and moved between the outer peripheral surface and between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion.
  Therefore, compared to the conventional disassembly method, although the number of disassembly plates increases, the time required for insertion movement and the labor required for insertion movement are reduced. Can be efficiently and easily performed with little effort.
  Further, at least the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion are in close contact with each other by the lubricant held in the groove on the surface of the dismantle plate facing the inner peripheral surface of the receiving pipe portion. And between the inner circumferential surface of the retaining member and the outer circumferential surface of the insertion tube portion, and the retaining member is brought into a retaining release state by the inserted dismantling plate. Even when the two pipe parts are moved relative to each other along the axis of the pipe axis while being held, there is a lubricant between the inner peripheral surface of the sealing material and the outer surface of the dismantling plate. Work can be easily performed with little effort. As the dismantling plate is inserted and moved between the two pipe parts, the lubricant retained in the lubricant retaining groove on the surface of the dismantling plate is gradually moved toward the center in the width direction. The increase in insertion resistance due to outflow can be suppressed.
[0006]
  The characteristic configuration of the disassembly jig for a pipe joint according to claim 2 of the present invention is as follows:An annular sealing material that is compressed between the inner peripheral surface of the receiving tube portion and the outer peripheral surface of the insertion tube portion that is inserted therein, and the outer periphery of the insertion tube portion that is inserted to a position that passes through the sealing material Detachable that can be displaced to the enlarged diameter side against the elastic restoring force from the detained state where it contacts the projecting part on the front end side of the surface in the tube axis direction to the unretained state that allows passage of the projecting part A disassembly jig for a pipe joint used in a disassembly method of a pipe joint in which both pipe parts are connected in a sealed state through a member,
  A plurality of narrow plate-shaped dismantling plates having a thickness capable of expanding and displacing the retaining member in a retaining release state and having a sharpened tip, and an outer peripheral surface of the insertion tube portion While applying vibration to each dismantling plate applied along the tube axis direction, the dismantling plate is placed between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion, and the inner periphery of the retaining member. A vibration exciter that is inserted and moved between the surface and the outer peripheral surface of the insertion tube part;Engagement means for detachably engaging both the base end side of the dismantling plate and the vibration exciter of the vibration exciter in a state where vibration is applied to the dismantling plate.WhenIs providedThe lubricant holding groove for holding the lubricant is bent at least on the surface in the width direction of the dismantling plate on the surface of the disassembling plate opposite to the inner peripheral surface of the receiving pipe portion. Formed and composedThere is in point.
  According to the above characteristic configuration,Since a plurality of narrow flat plate-shaped dismantling plates with sharpened tips are used, for example, even when the sealing material is in close contact with the outer peripheral surface of the insertion tube portion due to long-term use, it is necessary to peel off this sealing material. Since the force is small, and the disassembly plate is inserted and moved while applying vibration to the disassembly plate, the disassembly plate is placed between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion, and The insertion member can be smoothly inserted and moved between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion. Therefore, although the number of dismantling plates increases, the insertion movement time per one piece and the labor required for the insertion movement are reduced. It can be done easily.
  Also,By engaging the base end portion of the dismantling plate and the vibration exciter of the vibration exciter via the engaging means, the vibration exciter during the disassembly plate insertion operation while roughly handling the exciter Detachment can be suppressed.
  Therefore, it is possible to efficiently perform the work of inserting the dismantling plate with less labor and to facilitate handling during the operation of inserting the dismantling plate.
  Furthermore, at least the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion are in close contact with each other by the lubricant held in the groove on the surface of the dismantle plate facing the inner peripheral surface of the receiving pipe portion. And between the inner circumferential surface of the retaining member and the outer circumferential surface of the insertion tube portion, and the retaining member is brought into a retaining release state by the inserted dismantling plate. Even when the two pipe parts are moved relative to each other along the axis of the pipe axis while being held, there is a lubricant between the inner peripheral surface of the sealing material and the outer surface of the dismantling plate. Work can be easily performed with little effort. As the dismantling plate is inserted and moved between the two pipe parts, the lubricant retained in the lubricant retaining groove on the surface of the dismantling plate is gradually moved toward the center in the width direction. The increase in insertion resistance due to outflow can be suppressed.
  According to claim 3 of the present invention, the disassembling jig for a pipe joint is characterized in that the lubricant retaining groove is located closer to the base end side in the width direction center side of the dismantling plate on each of the front and back surfaces of the disassembling plate. It is in the point which is bent and formed in the state which deviates.
  According to this characteristic configuration, the dismantling plate is removed between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion in close contact with each other by the lubricant held in the grooves on the front and back of the dismantling plate. It can be smoothly inserted and moved between the inner peripheral surface of the stopper member and the outer peripheral surface of the insertion tube portion, and both the tube portions are held while the retaining member is held in the unlocked state by the inserted dismantling plate. Even when moving relatively away along the tube axis direction, there is a lubricant between the inner peripheral surface of the sealing material and the outer surface of the dismantling plate, making it easy to remove both pipe parts with little effort. It can be carried out. Further, as the dismantling plate is inserted and moved between the pipe sections, the lubricant held in the lubricant holding grooves on the front and back of the dismantling plate is gradually brought closer to the center in the width direction. It is possible to suppress an increase in insertion resistance due to outflow in the outward direction.
[0007]
  Claims of the invention4The characteristic structure of the dismantling jig for pipe joints is that when the engaging means is in an engaged state at a position where the base end of the disassembling plate and the vibration exciter of the vibration exciter are opposed to each other, A swing restricting means for restricting relative swing between the dismantling plate and the vibrating body in the width direction is provided.
  According to the above characteristic configuration, when the dismantling plate is inserted, the dismantling plate is swung in the width direction with respect to the vibrating member when the pushing operation is performed while vibrating the dismantling plate with the vibrating member of the vibrating device. Can be suppressed by the swing restricting means.
  Therefore, since the straightness at the time of pushing in the dismantling plate along the tube axis direction can be improved, the efficiency of inserting the dismantling plate can be promoted.
[0008]
  Claims of the invention5The characteristic configuration of the pipe joint disassembling jig is that an inclined surface intersecting at an acute angle with respect to the plate surface in contact with the outer peripheral surface of the insertion tube portion is formed at the distal end portion of the disassembling plate.
  According to the above characteristic configuration, the sharply inclined surface formed at the distal end portion of the dismantling plate is provided between the inner peripheral surface of the sealing material in a close contact state and the outer peripheral surface of the insertion tube portion, and of the retaining member. It is possible to smoothly insert and move between the inner peripheral surface and the outer peripheral surface of the insertion tube portion, and it is possible to improve the efficiency of inserting the dismantling plate.
[0009]
  Claims of the invention6The characteristic structure of the disassembly jig for pipe joints is that the base end portion of the disassembly plate is bent and formed on the side away from the outer peripheral surface of the insertion tube portion.Furthermore, the engaging means is composed of an engaging convex portion and an engaging concave portion, which are formed on opposite sides of the base end portion of the dismantling plate and the vibrating body of the vibrating device. HaveIn the point.
  According to the above characteristic configuration, since the base end portion of the dismantling plate is bent, damage to the outer peripheral surface of the insertion tube portion during insertion of the dismantling plate can be suppressed.In addition, at the time of inserting the dismantling plate, the engaging convex portion and the engaging concave portion formed at the opposing portions of the base end side of the disassembling plate and the vibration exciter of the vibration exciter are fitted, While suppressing detachment of the vibrating body during insertion of the demolition plate, it is possible to reliably apply vibration from the vibrating body to the demolition plate, and between the base end side of the demolition plate and the vibrating body Since it is only necessary to form the engaging convex portion and the engaging concave portion at the opposite portions, the disassembling plate can be inserted efficiently while simplifying the structure and reducing the manufacturing cost.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
FIGS. 1-10 is the receiving pipe part 1 formed in the one end part side of one fluid transport pipe P used as connection object among several fluid transport pipes P, such as a water pipe and a gas pipe, and the other 1 shows a pipe joint that connects and disconnects the insertion pipe part 2 formed on the other end side of the fluid transport pipe P in a sealed state from the direction of the pipe axis X, which is the inner circumference of the receiving pipe part 1 Of the annular grooves 1b and 1c formed on the surface 1a and at a predetermined interval in the tube axis X direction, the annular groove 1b located on the opening side of the receiving tube portion 1 An annular sealing material 3 made of an elastic material such as rubber that seals between the outer peripheral surface 2a of the insertion tube portion 2 is mounted in a compressed state with the outer peripheral surface 2a of the insertion tube portion 2. In the annular groove 1c located on the back side of the receiving pipe portion 1, a substantially ring-shaped retaining member 4 cut at one circumferential direction, and the removal The function of holding the female member 4 at a position where the shaft core thereof matches or substantially matches the tube shaft core X of the receiving pipe portion 1 and the elastic deformation of the retaining member 4 toward the diameter expansion side to the retaining release state. A centering ring 5 made of an elastic material having an allowable function is attached.
[0014]
In addition, the distal end portion of the outer peripheral surface 2a of the insertion tube portion 2 has an annular shape that protrudes outward in the radial direction while being able to contact the retaining member 4 in the retaining state from the tube axis X direction. As shown in FIG. 2, the retaining member 4 that is in the retaining state is formed on the upper side of the annular projecting portion 6 in the insertion movement direction, as the insertion tube portion 2 is inserted. A cam surface 6a is formed that is displaced (elastically deformed) to the diameter-expanded side to the unlocking release state against its elastic restoring force and the elastic restoring force of the centering ring 5 disposed on the outer peripheral side thereof. .
[0015]
Then, by inserting the insertion tube portion 2 into the receiving tube portion 1 from the direction of the tube axis X, the sealing material 3 moves along the insertion movement of the inner circumferential surface of the annular groove 1b of the receiving tube portion 1. Further, the retaining member 4 is compressed and deformed to the expanded diameter side while being pressed against the elastic member, and further, the retaining member 4 is expanded to the retaining release state against its own elastic restoring force and the elastic restoring force of the centering elastic ring 5. When the projection 6 of the insertion tube portion 2 is displaced, the retaining member 4 in the retaining release state is reduced in diameter to the retaining state by an elastic restoring force.
[0016]
Therefore, by simply inserting the insertion tube portion 2 into the receiving tube portion 1, not only can both the tube portions 1 and 2 be secured and connected in a sealed state, but also due to unsettled subsidence, earthquakes, etc. 4, the annular protrusion 6 of the insertion tube portion 2 and the retaining member 4 held in the annular groove 1c of the receiving tube portion 1 are in the direction of the tube axis X, as shown in FIG. It is possible to strongly prevent detachment of the receiving tube portion 1 and the insertion tube portion 2 by contact with each other.
[0017]
Next, a method of disassembling the pipe joint configured as described above and a disassembling jig used therefor will be described.
First, a plurality of narrow flat plate (narrow strip-shaped) dismantling plates 7 having a thickness capable of expanding and displacing the retaining member 4 in a retaining release state and having sharpened tips. Prepare.
The dismantling plate 7 is made of a metal such as stainless steel formed in a narrow flat plate shape (for example, a length of 300 mm, a width of 10 mm, and a thickness of 3 mm), and is inserted into a distal end portion that is one end side in the longitudinal direction. An inclined surface 7d that intersects an acute angle with respect to a plate surface (also the back surface) 7b that contacts the outer peripheral surface 2a of the tube portion 2 is formed, and is an example of a vibration body of the vibration device A. 7, the striking shaft 10 for applying a periodic impact force (vibration) in the axial direction to the shaft 7 and the base end side which is the other end side in the longitudinal direction of the dismantling plate 7, Engagement means B is provided for detachably engaging both 10 and 7 in a state in which vibration is applied to the disassembly plate 7.
Further, on each of the front and back surfaces 7a and 7b of the dismantling plate 7, a large number of lubricant retaining grooves 9 capable of retaining a lubricant are bent so that the center side in the width direction of the disassembling plate 7 is displaced toward the base end side. (In this embodiment, when the base end portion 7e of the disassembling plate 7 is applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction). The insertion tube portion 2 is formed to be bent in an arc shape at a predetermined angle (in the embodiment, an angle range of 90 degrees) on the side away from the outer peripheral surface 2a.
[0018]
The engaging means B penetrates and forms a round hole-like locking hole (an example of an engaging recess) 8j along the longitudinal direction of the dismantling plate 7 in the bent base end portion 7e of the disassembling plate 7 and A columnar engaging portion (an example of an engaging convex portion) 10 h that is detachably fitted to the locking hole 8 j of the dismantling plate 7 is formed at the tip of the shaft 10.
Further, in a state where the engaging portion 10h of the striking shaft 10 is fitted in the locking hole 8j of the bent base end portion 7e, the disassembling plate 7 and the striking shaft 10 in the width direction of the disassembling plate 7 are relative to each other. Since the swinging can be restricted, when the engaging means B is in the engaged state with the engaging hole 8j and the engaging portion 10h of the engaging means B, the engaging position is substantially the swinging fulcrum. The swing restricting means C for restricting the relative swing between the dismantling plate 7 and the striking shaft 10 in the width direction of the disassembling plate 7 is also configured.
Then, by engaging the engaging portion 10h of the tip end portion of the hitting shaft 10 from the back side into the locking hole 8j formed in the bent base end portion 7e of the disassembling plate 7, Applying vibration (periodic impact force) to the distal end side of the lever, the engagement portion 10h of the distal end portion of the hitting shaft 10 is fitted from the front side into the locking hole 8j of the bent base end portion 7e. By combining them, vibration (periodic impact force) is applied to the dismantling plate 7 toward the base end side thereof.
That is, the back surface of the bent base end portion 7e is configured as a vibration receiving portion (impact receiving portion or external force receiving portion) that receives vibration toward the front end side of the dismantling plate 7, and the bent base end portion 7e. Is configured as a vibration receiving portion (impact receiving portion or external force receiving portion) that receives vibration toward the base end side of the dismantling plate 7.
[0019]
Therefore, it is possible to reliably apply vibration from the striking shaft 10 to the dismantling plate 7 while suppressing the disengagement of the striking shaft 10 during the operation of inserting the disassembling plate 7. Since it is only necessary to form the locking hole 8j and the engaging portion 10h at the opposing portions of the portion 7e and the striking shaft 10, the disassembling plate 7 can be inserted while simplifying the structure and reducing the manufacturing cost. Can be performed efficiently.
[0020]
Then, a plurality of dismantling plates 7 configured as described above are sequentially applied to a plurality of locations in the circumferential direction of the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction. Between the inner peripheral surface of the sealing material 3 and the outer peripheral surface 2a of the insertion tube portion 2 and the inner peripheral surface of the retaining member 4 while applying vibration (periodic impact force) with the vibration device A. It is inserted and moved between the outer peripheral surface 2 a of the insertion tube portion 2. As the dismantling plate 7 is inserted, the annular sealing material 3 that is in close contact with or fused to the outer peripheral surface 2a of the insertion tube portion 2 is formed by an acute inclined surface 7d formed at the tip of the disassembling plate 7. While being pressed against the inner peripheral surface side of the annular groove 1b of the receiving pipe portion 1, it is compressed and deformed to the enlarged diameter side and is released or peeled from the outer peripheral surface 2a of the insertion pipe portion 2, and the retaining member 4 is It is displaced to the diameter expansion side to the unlocking release state against its own elastic restoring force and the elastic restoring force of the centering elastic ring 5, and the unlocking release state is maintained. In this state, the receiving tube portion 1 and the insertion tube portion 2 are moved relative to each other along the tube axis X direction to release the fitting connection between both the tube portions 1 and 2.
[0021]
Further, the dismantling plate 7 applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction is applied with vibration (periodic impact force) by the vibration device A while the sealing material 3 When inserting and moving between the inner peripheral surface and the outer peripheral surface 2a of the insertion tube portion 2 and between the inner peripheral surface of the retaining member 4 and the outer peripheral surface 2a of the insertion tube portion 2, the rear surface 7b of the dismantling plate 7 Is strongly pressed against the outer peripheral surface 2a of the insertion tube portion 2. At this time, since the base end portion 7e of the disassembly plate 7 is bent and formed in an arc shape, the outer peripheral surface 2a of the insertion tube portion 2 by the disassembly plate 7 is formed. Damage can be suppressed.
[0022]
FIG. 9 shows a portable hitting tool which is an example of the vibration exciter A. The hitting shaft 10 is attached to and detached from the housing 15 and slidably held in the axial direction within a certain range. When the spindle 17 and the electric motor 18 are provided, the spindle 17 reciprocates and slides in the axial direction in conjunction with the eccentric rotator 19 fixed to the drive shaft 18a of the electric motor 18. An excitation piston 20, a flying piston 21 accelerated by the excitation piston 20, and a striking element 22 that applies impact force generated by the collision with the flying piston 21 to the striking shaft 10 are provided.
A plurality of narrow flat plate-shaped dismantling plates 7 having a thickness capable of expanding and displacing the retaining member 4 in a retaining release state and having a sharpened tip, and an insertion tube portion 2 while applying vibration to the disassembly plate 7 applied to the outer peripheral surface 2a of the tube 2 along the tube axis X direction, the disassembly plate 7 is connected to the inner peripheral surface of the sealing material 3 and the outer peripheral surface 2a of the insertion tube portion 2. A disassembly jig for a pipe joint is configured with the vibration device A inserted and moved between the inner peripheral surface of the retaining member 4 and the outer peripheral surface 2a of the insertion tube portion 2.
[0023]
[Second Embodiment]
FIG. 11 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a position where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. The engagement means B is provided for detachably engaging the both 10 and 7 in a state of applying the vibration, and the engagement means B is provided with vibration (periodic impact force) toward the distal end side of the dismantling plate 7 and a proximal end. A pin-like engagement receiving portion 8a fixed to the surface on the base end side of the dismantling plate 7 in a state where the vibration to the side can be received, and the engagement receiving portion 8a of the disassembling plate 7 being detachable. And a semicircular engaging portion 10a formed at the distal end portion of the striking shaft 10 in a state where the base end portion 7e of the disassembling plate 7 is separated from the outer peripheral surface 2a of the insertion tube portion 2. Are bent in an arc shape.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0024]
[Third Embodiment]
FIG. 12 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a position where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. The engagement means B is provided for detachably engaging the both 10 and 7 in a state of applying the vibration, and the engagement means B is provided with vibration (periodic impact force) toward the distal end side of the dismantling plate 7 and a proximal end. A curved projection 8b formed by bending the base end portion of the dismantling plate 7 into an inverted U shape in a state in which vibration to the side can be received, and a state in which the disassembling plate 7 can be externally fitted to the curving projection 8b. And a U-shaped engaging portion 10b formed at the distal end portion of the striking shaft 10, and further, the base end portion 7e of the disassembling plate 7 is separated from the outer peripheral surface 2a of the insertion tube portion 2. Are bent in an arc shape.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0025]
[Fourth Embodiment]
FIG. 13 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a position where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. Of the disassembling plate 7 with the engaging part being substantially a swinging fulcrum when the engaging means B is in the engaged state. A swing restricting means C for restricting relative swing between the dismantling plate 7 and the striking shaft 10 in the width direction is provided, and the base end portion 7e of the disassembling plate 7 is connected to the outer peripheral surface 2a of the insertion tube portion 2. It is bent and formed in an arc shape on the side to be separated.
The engaging means B has a pin-like protrusion 8c on the surface of the disassembly plate 7 on the base end side to receive vibration (periodic impact force) toward the front end of the disassembly plate 7 and vibration toward the base end. The locking groove 8d is cut out on both sides of the protruding portion 8c, and the tip of the hitting shaft 10 is formed with respect to the pin-shaped protruding portion 8c of the dismantling plate 7. An engagement hole 10c that is detachably fitted and an engagement protrusion 10d that is fitted in both locking groove portions 8d of the dismantling plate 7 from the plate thickness direction are formed.
The swing restricting means C is configured to have a pair of engaging groove portions 8d on the side of the dismantling plate 7 constituting the engaging means B and a pair of engaging protrusions 10d on the striking shaft 10 side.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0026]
[Fifth Embodiment]
FIG. 14 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a position where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. Of the disassembling plate 7 with the engaging part being substantially a swinging fulcrum when the engaging means B is in the engaged state. A swing restricting means C for restricting relative swing between the dismantling plate 7 and the striking shaft 10 in the width direction is provided, and the base end portion 7e of the disassembling plate 7 is connected to the outer peripheral surface 2a of the insertion tube portion 2. It is bent and formed in an arc shape at an angle of 90 degrees on the side to be separated.
The engaging means B has a protrusion capable of receiving the excitation force (periodic impact force) to the distal end side of the disassembly plate 7 and the excitation force to the proximal end side on the surface of the proximal end portion of the disassembly plate 7. The strip portion 8e is formed by punching along the longitudinal direction of the dismantling plate 7, and a locking groove portion 8f is formed in each side of each side of the projection portion 8e, and the tip end portion of the hitting shaft 10 is formed. The engaging groove 10e is detachably engaged with the protrusion 8e of the dismantling plate 7 in an externally fitted state, and the engaging protrusion 10f is engaged with both locking groove portions 8f of the disassembling plate 7. Is formed.
The swing restricting means C includes a protrusion 8e and a pair of locking grooves 8f on the side of the dismantling plate 7 constituting the engaging means B, an engagement groove 10e and a pair of engaging protrusions 10f on the striking shaft 10 side. It has a dual-purpose configuration.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0027]
[Sixth Embodiment]
FIG. 15 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a portion where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. Engaging means B is provided for detachably engaging both 10 and 7 in a state in which the insertion tube portion 2 is applied, and the base end portion 7e of the disassembling plate 7 is 90 degrees away from the outer peripheral surface 2a of the insertion tube portion 2. It is bent and formed in an arc shape at an angle of.
The engagement means B has a round locking hole (engagement) for receiving vibration (periodic impact force) toward the distal end side of the dismantling plate 7 and vibration toward the proximal end side at the proximal end portion of the disassembling plate 7. An example of a recess) 8g or a square engagement hole (an example of an engagement recess) 8h is formed so as to penetrate, and a round engagement hole 8g or a square engagement of the dismantling plate 7 is formed at the tip of the hitting shaft 10. A pin-shaped engaging portion (an example of an engaging convex portion) 10g that is detachably fitted to the stop hole 8h is formed.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0028]
[Seventh Embodiment]
FIG. 16 shows another embodiment of the pipe joint disassembling jig, which vibrates the disassembling plate 7 at a position where the striking shaft 10 of the vibration device A and the base end side of the disassembling plate 7 face each other. Engaging means B is provided for detachably engaging the both 10 and 7 in a state of applying the above.
Further, a twisted portion 7A is formed at a position displaced toward the base end side in the longitudinal direction of the disassembling plate 7 so that the distal end side and the base end side are different in phase by 90 degrees. In a state where the plate 7 is applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction, the dismantling plate portion 7B on the distal end side with respect to the twisted portion 7A is substantially in the tangential direction of the insertion tube portion 2. The disassembling plate portion 7C on the proximal end side with respect to the twisted portion 7A is in a vertical posture along a virtual plane (diameter direction) passing through the tube axis X of the insertion tube portion 2. It is configured.
When the engaging means B is applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction, out of both sides of the disassembly plate portion 7C on the base end portion side, A concave engagement receiving portion 8 is cut out on one side located on the side, and a semicircular shape that is freely engageable with the concave engagement receiving portion 8 is formed at the tip of the batting shaft 10. The engaging portion 10a is notched and formed.
Then, by pressing the engagement portion 10a at the distal end portion of the hitting shaft 10 against the corner portion on the distal end in the concave engagement receiving portion 8, the vibration toward the distal end side of the demolition plate 7 ( (Periodic impact force) is applied to the disassembling plate 7 by pressing the engaging portion 10a at the distal end of the striking shaft 10 against the base side corner in the engaging receiving portion 8. It is comprised so that the vibration (periodic impact force) to the base end side may be provided.
[0029]
Furthermore, the twisted portion 7A formed on the dismantling plate 7 causes both side sides of the base end side disassembling plate portion 7C to protrude from the front and back surfaces 7a and 7b of the disassembling plate portion 7B on the distal end side. When it is applied to the outer peripheral surface 2a along the tube axis X direction, the entire dismantling plate 7 is inclined and its sharp tip comes into contact with the outer peripheral surface of the insertion tube portion 2.
That is, when the twisted portion 7A is applied to the outer peripheral surface of the insertion tube portion 2 along the tube axis X direction, the sharp tip of the disassembly plate 7 is forcibly brought into contact with the outer peripheral surface of the insertion tube portion 2. Forced contact means is configured.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0030]
[Eighth Embodiment]
FIG. 17 shows another embodiment of the disassembly jig for pipe joints, which is a plate surface that comes into contact with the outer peripheral surface 2 a of the insertion tube portion 2 at the distal end that is one end side in the longitudinal direction of the disassembly plate 7. An inclined surface 7d that intersects at an acute angle with respect to 7b (which is also the back surface) is formed, and the tip portion is formed in a tapered shape that becomes narrower toward the tip side.
Therefore, the distal end portion of the disassembling plate 7 is formed in a sharp shape that is thinner and narrower toward the distal end side, so even if the sealing material 3 is hardened with long-term use, It can be smoothly inserted and moved between the peripheral surface and the outer peripheral surface 2a of the insertion tube portion 2 with little effort.
Since other configurations are the same as those described in the first embodiment, description thereof will be omitted.
[0031]
  [Other Embodiments]
  (1) In each of the above-described embodiments, the vibration device A has been described using the example in which the electric motor 18 is used as a drive source. Good.
  In short, the vibration device A may be implemented using any structure as long as vibration (periodic impact force in the axial direction) can be applied to the vibration body (striking shaft). Good.
  (2) In each of the embodiments described above, a large number of lubricant holding grooves 9 for holding the lubricant are formed on each of the front and back surfaces 7a and 7b of the dismantling plate 7, but at least the inner peripheral surface 1a of the receiving pipe portion 1 The lubricant holding groove 9 may be formed on the surface 7a of the dismantling plate 7 facing each other.
  (3) In each of the above-described embodiments, the large number of lubricant retaining grooves 9 of the dismantling plate 7 are formed in a V-shape that is displaced toward the base end side toward the center in the width direction. The, WYou may form in a letter shape.
  (4) In each of the above-described embodiments, the inlet pipe portion 1 formed on one end side of one fluid transport pipe P to be connected and the other end side of the other fluid transport pipe P are formed. Although the pipe joint that connects and disconnects the insertion pipe portion 2 from the tube axis X direction in a sealed state has been described as an example, a pipe joint that fits and connects the fluid transport pipe P and the connection pipe portion of the on-off valve It may also be a pipe joint for fitting and connecting pipe parts of other fluid devices.
  (5) In each of the above-described embodiments, the retaining member 4 is held on the outer peripheral side of the retaining member 4 at a position where the axial center of the retaining member 4 matches or substantially matches the tube core X of the receiving pipe portion 1. The centering ring 5 made of an elastic material having the function of allowing the elastic member to be elastically deformed to the diameter-enlarged side to the unlocking state of the retaining member 4 is mounted, but the centering ring 5 is omitted. May be implemented.
  Further, in each of the above-described embodiments, the retaining member 4 is configured in a substantially ring shape in which one place in the circumferential direction is cut, but the retaining member 4 is divided into a plurality in the circumferential direction, The split retaining member 4 is protruded from the retaining state in which it contacts the projecting portion 6 on the distal end side of the outer peripheral surface of the insertion tube portion 2 inserted to a position passing through the sealing material 3 from the tube axis X direction. It is also possible to implement the structure in such a manner that the retaining release state allowing the passage of the part 6 can be displaced to the enlarged diameter side against the elastic restoring force.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view immediately before connection of both pipe portions showing a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view in the middle of connection of both pipe parts
FIG. 3 is a longitudinal sectional view when connection between both pipe portions is completed.
FIG. 4 is a longitudinal sectional view when a tensile force is applied to both pipe portions.
FIG. 5 is a longitudinal sectional view in the middle of inserting a dismantling plate
FIG. 6 is a longitudinal sectional view at the end of insertion of a dismantling plate
FIG. 7 is a vertical cross-sectional view of both pipes in the middle of detachment movement
FIG. 8 is a vertical cross-sectional view of when both pipe parts are detached.
FIG. 9 is a schematic partially cutaway view of the vibration device.
FIG. 10 is a perspective view of a part of a dismantling plate and a hitting shaft.
FIG. 11 is a perspective view of a main part of a disassembly jig showing a second embodiment of the present invention.
FIG. 12 is a perspective view of a main part of a disassembly jig showing a third embodiment of the present invention.
FIG. 13 is a perspective view of a main part of a disassembly jig showing a fourth embodiment of the present invention.
FIG. 14 is a perspective view of an essential part of a disassembly jig showing a fifth embodiment of the present invention.
FIG. 15 is a perspective view of a main part of a disassembly jig showing a sixth embodiment of the present invention.
FIG. 16 is a perspective view of a main part of a disassembly jig showing a seventh embodiment of the present invention.
FIG. 17 is a perspective view of a main part of a dismantling plate showing an eighth embodiment of the present invention.
FIG. 18 is a longitudinal sectional view showing a conventional method of disassembling a pipe joint
FIG. 19 is a cross-sectional view showing a conventional method of disassembling a pipe joint
[Explanation of symbols]
A Exciter
B engagement means
C Swing regulation means
X Tube core
1 Receptacle tube
1a Inner peripheral surface
1b Annular groove
1c annular groove
2 Insertion tube
2a Outer peripheral surface
3 Sealing material
4 retaining member
6 Projections
7 Demolition board
8 engagement receiver
9 Lubricant holding groove
10 Exciting body (striking shaft)

Claims

An annular sealing material that is compressed between the inner peripheral surface of the receiving tube portion and the outer peripheral surface of the insertion tube portion that is inserted therein, and the outer periphery of the insertion tube portion that is inserted to a position that passes through the sealing material Detachable that can be displaced to the enlarged diameter side against the elastic restoring force from the detained state where it contacts the projecting part on the front end side of the surface in the tube axis direction to the unretained state that allows passage of the projecting part A method of disassembling a pipe joint in which both pipe parts are secured and connected in a sealed state via a member,
The retaining member has a thickness capable of expanding and displacing to a retaining release state, has a sharp tip, and further has at least a surface facing the inner peripheral surface of the receiving tube portion. Prepare a plurality of narrow plate-shaped dismantling plates that are formed by bending a lubricant holding groove for holding a lubricant so that the center side in the width direction is displaced toward the base end side, and the outer peripheral surface of the insertion tube portion Each dismantling plate applied along the pipe axis direction is applied between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion while applying vibration with a vibration device, and within the retaining member. A method for disassembling a pipe joint that is inserted and moved between a peripheral surface and an outer peripheral surface of an insertion pipe portion.

An annular sealing material that is compressed between the inner peripheral surface of the receiving tube portion and the outer peripheral surface of the insertion tube portion that is inserted therein, and the outer periphery of the insertion tube portion that is inserted to a position that passes through the sealing material Detachable that can be displaced to the enlarged diameter side against the elastic restoring force from the detained state where it contacts the projecting part on the front end side of the surface in the tube axis direction to the unretained state that allows passage of the projecting part A dismantling jig for a pipe joint used in a disassembling method of a pipe joint in which both pipe parts are connected in a sealed state through a member ,
A plurality of narrow plate-shaped dismantling plates having a thickness capable of expanding and displacing the retaining member in a retaining release state and having a sharpened tip, and an outer peripheral surface of the insertion tube portion While applying vibration to each dismantling plate applied along the tube axis direction, the dismantling plate is placed between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion, and the inner periphery of the retaining member. A vibration device that is inserted and moved between the surface and the outer peripheral surface of the insertion tube portion; and a portion where the base end side of the disassembly plate and the vibration member of the vibration device are opposed to each other, the disassembly plate Engaging means that is detachably engaged in a state in which vibration is applied thereto , and a lubricant holding groove for holding the lubricant is provided at least on the surface of the dismantling plate facing the inner peripheral surface of the receiving pipe portion. A dismantling jig for a pipe joint that is bent and formed so as to be displaced toward the base end side toward the center side in the width direction of the disassembling plate .

3. The lubricant holding groove is formed on each of the front surface and the back surface of the dismantling plate so as to be bent toward the base end side toward the width direction center side of the dismantling plate. The disassembly jig for pipe joints described.

When the engaging means is in the engaged state, the dismantling plate and the vibrating body in the width direction of the disassembling plate are disposed at the opposing portions of the base end portion of the disassembling plate and the vibrating body of the vibrating device. pipe joint disassembling jig according to claim 2 or 3 swing restriction means is al provided for regulating the relative rocking of the.

The pipe joint according to any one of claims 2 to 4 , wherein an inclined surface that intersects at an acute angle with respect to a plate surface that is in contact with an outer peripheral surface of the insertion tube portion is formed at a distal end portion of the dismantling plate. Dismantling jig for.

The base end portion of the dismantling plate is formed to be bent away from the outer peripheral surface of the insertion tube portion, and the engaging means is opposed to the base end portion of the dismantling plate and the vibration exciter of the vibration exciter. The disassembly jig for a pipe joint according to any one of claims 2 to 5, wherein the disengagement jig is formed of an engaging convex portion and an engaging concave portion which are formed in a portion to be fitted .