JP2004108519A

JP2004108519A - Joint

Info

Publication number: JP2004108519A
Application number: JP2002273354A
Authority: JP
Inventors: Munetaka Ozeki; 大関　宗孝; Hiroki Someya; 染谷　洋樹; Hirohide Hashimoto; 橋本　博英; Hirosuke Asano; 浅野　裕輔; Takashi Kunito; 國藤　崇
Original assignee: Ishikawajima Kenzai Kogyo Co Ltd; Ishikawajima Construction Materials Co Ltd
Current assignee: Ishikawajima Kenzai Kogyo Co Ltd; Ishikawajima Construction Materials Co Ltd
Priority date: 2002-09-19
Filing date: 2002-09-19
Publication date: 2004-04-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint which materializes securement of joining strength, improvement of working efficiency and reduction of a construction period when integrally joining together adjoining two members, for instance, a plurality of segments provided to an inside surface of an excavated part such as a tunnel. <P>SOLUTION: The joint 1 integrally joining adjoining two members is equipped with a male joint 2 provided to one member, and with a female joint 12 provided to the other member and mutually fitted with the male joint 2. The female joint 12 is enlarged to allow fitting with the male joint 2 when fitting with the male joint 2. After completion of the fitting, the female joint 12 is contracted to retain the fitting state with the male joint 2. In the male joint 2, a female screw 8 having a center axial line in the fitting direction is formed on the tip. The female screw 8 is provided with a male tightening screw 18 engaged with a fixing member 16 to be screwed thereto. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、継手に関し、特に隣接する二つの部材同士、例えば地下鉄のトンネル等の堀削した部分の内面に設けられる複数のセグメントの隣接するもの同士を一体に接合するのに有効な継手に関する。
【０００２】
【従来の技術】
一般に、シールド工法等により地下鉄のトンネル等を構築する場合には、堀削した部分の内面にスチール型セグメント、中詰コンクリート型セグメント、コンクリート型セグメント等のセグメントを設け、堀削した部分を被覆し、支持している。
【０００３】
この種のセグメントの一例が図１７に示されている。このセグメント１０１は、スチール型セグメントであって、セグメント本体１０２の長手方向の両端面に一体に設けられる長方形板状の金属製の長手方向接合板１０３ａ、１０３ｂと、セグメント本体１０２の幅方向の両端面に一体に設けられる円弧板状の金属製の幅方向接合板１０４ａ、１０４ｂとからなるものであって、各長手方向接合板１０３ａ、１０３ｂ及び各幅方向接合板１０４ａ、１０４ｂにはそれぞれネジ挿通用の孔１０５ａ、１０５ｂ及び１０６ａ、１０６ｂが貫通した状態で設けられている。
【０００４】
そして、上記のような構成のセグメント１０１を、トンネル等の堀削した部分の内面に周方向に連続して設け、長手方向接合板１０３ａ、１０３ｂのネジ挿通用の孔１０５ａ、１０５ｂ間に継手のボルト（図示せず）を挿通させ、ボルトのネジ部に継手のナット（図示せず）を螺合させて締め付け、周方向に隣接するセグメント１０１、１０１同士を一体に接合（セグメント間接合）し、同一周上にリング状のセグメントリング体（図示せず）を構成する。
【０００５】
そして、このようなセグメントリング体を掘削方向に連続して設け、堀削方向に隣接するセグメントリング体のセグメント１０１、１０１同士を同様の方法によって一体に接合（リング間接合）し、堀削した部分の内面の全体を複数のセグメント１０１、１０１…で被覆する。このようにして、堀削した部分の内面を複数のセグメント１０１、１０１…で支持することができるものである（例えば、特許文献１参照。）。
【０００６】
【特許文献１】
特開２００１−１４０５９６号公報
【０００７】
【発明が解決しようとする課題】
ところで、上記従来のセグメント１０１においては、スチール製のセグメント本体１０２の複数箇所に建築現場にて、例えば幅方向接合板１０４ａ、１０４ｂのネジ挿通用の孔１０６ａ、１０６ｂにボルトを挿通させ、これにナットを螺合して締め付けるという極めて煩雑な作業を要するので、作業効率が悪く、工期が長期化するという問題があった。
【０００８】
この発明は、このような事情を考慮してなされたもので、その目的は、隣接する二つの部材、例えばトンネル等の堀削した部分の内面に設けられる複数のセグメント同士の接合に用いた場合に、隣接するセグメント同士の接合が容易であって、接合強度を確保しつつ作業効率が良く、工期を短縮することを可能とする継手を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、この発明は以下の手段を提案している。
請求項１に係る発明は、隣接する二つの部材を一体に接合する継手であって、一方の部材に設けられる雄型継手と、他方の部材に設けられると共に前記雄型継手と相互に嵌合する雌型継手とを備え、前記雌型継手は、前記雄型継手との嵌合の際に拡径して前記雄型継手との嵌合を許容し、嵌合完了後に縮径して前記雄型継手との嵌合状態を保持するように構成され、前記雄型継手には、その先端部に前記嵌合方向を中心軸線とする雌ネジ部が形成され、該雌ネジ部には、固定部材に係合して前記雌ネジ部に螺合される雄型増締ネジが設けられることを特徴とする。
【００１０】
この発明に係る継手によれば、一方の部材の雄型継手と他方の部材の雌型継手とが相互に嵌合する際、雌型継手が拡径することにより雄型継手との嵌合が許容され、嵌合完了後に雌型継手が縮径することにより雄型継手との嵌合状態に保持され、隣接する二つの部材が一体に接合されると共に、さらに雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。したがって、隣接する二つのセグメント同士の接合が容易かつ確実となり、接合強度を確保しつつ工期を大幅に短縮させることができる。
【００１１】
請求項２に係る発明は、請求項１記載の継手において、前記雄型継手は、外周面に第１の凹凸が設けられると共にその先端部に前記嵌合方向を中心軸線とする雌ネジ部が形成される嵌合部材を有し、前記雌型継手は、内周面に前記第１の凹凸と相互に嵌合する第２の凹凸が設けられると共に、周方向に複数に分割されて拡径可能な被嵌合部材と、該被嵌合部材を縮径する方向に押圧する押圧部材とを有し、前記被嵌合部材は、前記嵌合部材との嵌合の際に前記押圧部材に抗して拡径して前記嵌合部材との嵌合を許容し、嵌合完了後に前記押圧部材により押圧されて縮径して前記嵌合部材との嵌合状態を保持するよう構成されることを特徴とする。
【００１２】
この発明に係る継手によれば、雄型継手の嵌合部材の第１の凹凸と雌型継手の被嵌合部材の第２の凹凸とが相互に嵌合する際に、雌型継手の被嵌合部材が押圧部材に抗して拡径することにより雄型継手の嵌合部材との嵌合が許容され、嵌合後に被嵌合部材が押圧部材により押圧されて縮径することにより嵌合部材との嵌合状態に保持され、さらに雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。
【００１３】
請求項３に係る発明は、請求項１記載の継手において、前記雄型継手は、外周面に第３の凹凸が設けられると共にその先端部に前記嵌合方向を中心軸線とする雌ネジ部が形成される嵌合部材を有し、前記雌型継手は、内周面に前記第３の凹凸の凹部に嵌合すると共に、周方向に切欠を有して拡径可能な被嵌合部材を有し、前記被嵌合部材は、前記嵌合部材との嵌合の際に拡径して前記嵌合部材との嵌合を許容し、嵌合完了後に弾性復帰により縮径して前記嵌合部材との嵌合状態を保持するよう構成されることを特徴とする。
【００１４】
この発明に係る継手によれば、雄型継手の嵌合部材の第３の凹凸の凹部に雌型継手の被嵌合部材が嵌合する際に、雌型継手の被嵌合部材が弾性変形によって拡径することにより雄型継手の嵌合部材との嵌合が許容され、嵌合後に被嵌合部材が弾性復帰して縮径し、被嵌合部材が嵌合部材の凹部に引っ掛かることにより嵌合部材との嵌合状態に保持され、さらに雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。
【００１５】
請求項４に係る発明は、請求項１記載の継手において、前記雄型継手は、外周面に凹部が設けられると共にその先端部に前記雌ネジ部が設けられる嵌合部材を有し、前記雌型継手は、前記凹部と相互に嵌合する凸部が設けられると共に、拡径可能な被嵌合部材を有し、前記被嵌合部材は、前記嵌合部材との嵌合の際に拡径して前記嵌合部材との嵌合を許容し、嵌合完了後に弾性復帰により縮径して前記嵌合部材との嵌合状態を保持するよう構成されることを特徴とする。
【００１６】
この発明に係る継手によれば、雄型継手の嵌合部材の凹部に雌型継手の被嵌合部材の凸部が嵌合する際に、雌型継手の被嵌合部材が弾性変形によって拡径することにより雄型継手の嵌合部材との嵌合が許容され、嵌合後に被嵌合部材が弾性復帰して縮径し、被嵌合部材の凸部が嵌合部材の凹部に引っ掛かることにより嵌合部材との嵌合状態に保持され、さらに雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。
【００１７】
請求項５に係る発明は、請求項１記載の継手において、前記雄型継手は、内周面に前記雌ネジ部が設けられる嵌合部材を有し、前記雌型継手は、前記嵌合部材と相互に嵌合する被嵌合部材を有し、前記被嵌合部材は、前記嵌合部材との嵌合の際に拡径して前記嵌合部材との嵌合を許容し、嵌合完了後に弾性復帰による縮径、又は塑性変形後に前記嵌合部材との摩擦により、前記嵌合部材との嵌合状態を保持するよう構成されることを特徴とする。
【００１８】
この発明に係る継手によれば、雄型継手の嵌合部材と雌型継手の被嵌合部材とが相互に嵌合する際に、雌型継手の被嵌合部材が弾性変形によって拡径することにより雄型継手の嵌合部材との嵌合が許容され、嵌合後に被嵌合部材が弾性復帰して縮径し、被嵌合部材が嵌合部材を押圧することにより嵌合部材との嵌合状態に保持され、さらに雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。又は、相互に嵌合する際に、雌型継手の被嵌合部材が塑性変形によって拡径することにより雄型継手の嵌合部材との嵌合が許容され、嵌合部材との摩擦により嵌合部材との嵌合状態に保持され、同様に雌ネジ部に雄型増締ネジを螺合して緊締することにより堅固に接合される。
【００１９】
【発明の実施の形態】
以下、図面を参照し、この発明の実施の形態について説明する。図１から図４はこの発明の第１の実施の形態を示す図である。
図１から図４において、継手１は、隣接する二つの部材を一体に接合するものであって、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。
【００２０】
雄型継手２は、先端部外周面に断面鋸歯状の凹凸（第１の凹凸）４が軸方向に沿って連続して設けられると共に一端に頭部５を有する金属製の棒状の嵌合部材３と、嵌合部材３を支持する金属製の雄型継手板７とから構成され、嵌合部材３と雄型継手板７とは、溶接等によって一体に連結されている。嵌合部材３の他端には、嵌合方向を中心軸線とする雌ネジ部８が形成されている。
【００２１】
雌型継手１２は、内周面に雄型継手２の嵌合部材３の凹凸４と相互に嵌合する断面鋸歯状の凹凸（第２の凹凸）１４が軸方向に沿って連続して設けられると共に、周方向に複数（この実施の形態においては５つ）に分割されて拡径可能な金属製の環状の被嵌合部材１３と、被嵌合部材１３の外周側に被嵌されると共に、被嵌合部材１３を縮径する方向に押圧して被嵌合部材１３を環状に保持するウレタンゴム等の弾性体からなる環状の押圧部材１５と、被嵌合部材１３及び押圧部材１５を保持する金属製のケース（固定部材）１６とから構成されている。ケース１６の内周面と押圧部材１５の外周面との間には所定の間隙が形成され、この間隙により被嵌合部材１３の拡径が許容されるようになっている。ケース１６は、溶接等によって雌型継手板１７と一体に連結されており、ケース１６には、被嵌合部材１３を拡径可能に案内すると共に、嵌合部材３の雌ネジ部８に雄型増締ネジ１８を螺合して緊締したときに反力を得ることができるよう、挿通孔の形成された端板１９が設けられている。なお、被嵌合部材１３の分割数は５つに限らず複数であれば良いものである。
【００２２】
上記のような構成の雄型継手２と雌型継手１２とからなる継手１を用いて、隣接する二つの部材、例えばトンネル等の堀削した部分の内面に設けられる複数のセグメントの隣接するもの同士を一体に接合するには、従来例として図１７に示したように、スチール型のセグメント１０１である場合には、セグメント１０１の接合部１０３ａ、１０３ｂ、１０４ａ、１０４ｂ（長手方向の両接合部１０３ａ、１０３ｂ及び幅方向の両接合部１０４ａ、１０４ｂ）に雄型継手２及び雌型継手１２を設ける。
【００２３】
具体的には、例えばリング間接合の場合には、セグメント１０１の幅方向の一方の接合部１０４ａに雄型継手２を設け、幅方向の他方の接合部１０４ｂに雌型継手１２を設ける。この場合、雄型継手板７が一方の幅方向接合板１０４ａを構成し、雌型継手版１２が他方の幅方向接合部１０４ｂを構成する。なお、幅方向の一方の接合部１０４ａに雌型継手１２を設け、幅方向の他方の接合部１０４ｂに雄型継手２を設けてもよい。
【００２４】
上記の構成からなるセグメントを互いに接合するには、セグメントをトンネル等の堀削した部分の内面に位置させ、図１に示すように、長手方向に隣接する二つのセグメントの周方向の端面同士を相対的に接近させ、図２に示すように、一方のセグメントの雄型継手２の嵌合部材３を他方のセグメントの雌型継手１２の被嵌合部材１３の内側に挿入し、両セグメントの対向する端面同士が互いに接触するまで挿入する。
【００２５】
この状態において、嵌合部材３により押圧されることで被嵌合部材１３が押圧部材１５に抗して拡径し、嵌合部材３の挿入が許容され、嵌合部材３の凹凸４と被嵌合部材１３の凹凸１４とが相互に嵌合される。嵌合が完了したときに、押圧部材１５により被嵌合部材１３が縮径する方向に押圧されることで被嵌合部材１３が環状に保持され、嵌合部材２との嵌合状態に保持され、嵌合部材３が被嵌合部材１３内から抜け出ることのない状態に保持される。つまり、被嵌合部材１３から嵌合部材３を引き抜くような力が加わったときには、押圧部材１５によって押圧されて嵌合部材３の凹凸４の凸部（凹部）が被嵌合部材１３の凹凸１４の凹部（凸部）に互いに食い込んで嵌合方向に対して引っ掛かった状態にあるので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部が端板１９を押圧し、頭部５と雄型増締ネジ１８との嵌合方向の距離が短縮される。この際、頭部５と雄型増締ネジ１８との間に配置されるケース１６から反力を得ることで、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。
【００２６】
これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。そして、このようにセグメントリング体を堀削方向に順次設けることで、堀削した部分の内面の全体を複数のセグメントで被覆し、支持することができるものである。
【００２７】
図５、図６は、この発明の第２の実施の形態を示す図である。
図５、図６において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２は、嵌合部材３に凹凸４が設けられていない点を除けば、第１の実施の形態と同様の構成とされている。
【００２８】
雌型継手１２は、金属製の環状のケース（固定部材）１６と、ケース１６の内周面に当接されて嵌合方向に直行する方向に弾性変形可能な薄肉の鋼からなる環状の薄肉鋼管（被嵌合部材）２３とから構成されている。ケース１６は、その内径が雌型継手板１７に形成された挿通孔の内径とほぼ同一となるように構成されており、溶接等によって雌型継手板１７と一体に連結されている。薄肉鋼管２３は、その軸線方向に直行する方向の両端が外方へ向かうに従い拡径するように構成されており、この両端は、それぞれ雌型継手板１７の挿通孔の内周面とケース１６の内周面とに当接されている。ケース１６の内周面には、突起部２２が設けられており、これにより薄肉鋼管２３の嵌合方向への移動が阻止されるようになっている。
【００２９】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を薄肉鋼管２３に挿入すると、嵌合部材３により押圧されることで薄肉鋼管２３の軸線方向中心部が拡径して嵌合部材３の挿入が許容され、嵌合部材３と薄肉鋼管２３とが相互に嵌合される。嵌合が完了したときに、薄肉鋼管２３の軸線方向中心部は縮径する方向に弾性復帰し、又は嵌合の際に塑性変形したときに、嵌合部材３との嵌合状態に保持され、摩擦力により嵌合部材３が薄肉鋼管２３内から抜け出ることのない状態に保持される。つまり、薄肉鋼管２３から嵌合部材３を引き抜くような力が加わったときには、弾性復帰によって薄肉鋼管２３の内周面が嵌合部材３の外周面を押圧していることにより、薄肉鋼管２３と嵌合部材３とが相対移動する嵌合方向に摩擦力が作用するので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部がケース１６を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００３０】
図７、図８は、この発明の第３の実施の形態を示す図である。
図７、図８において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２は、第２の実施の形態と同様の構成とされている。
【００３１】
雌型継手１２は、金属製の環状のケース（固定部材）１６と、ケース１６に固定されて嵌合方向に直行する方向に弾性変形可能な薄肉の鋼からなる断面略Ｌ字状の環状の薄肉鋼管（被嵌合部材）３３とから構成されている。ケース１６は、その内径が雌型継手板１７に形成された挿通孔の内径とほぼ同一となるように構成されており、溶接等によって薄肉鋼管３３を介在させて雌型継手板１７と一体に連結されている。薄肉鋼管３３は、その軸線方向に直行する方向の一端部３５が外方へ向かうに従い縮径するように構成されており、他端部３６が外方へ向かうに従い拡径すると共に嵌合方向に直行する面を有するように構成されている。この他端部３６を介してケース１６と雌型継手板１７とが連結されている。
【００３２】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を薄肉鋼管３３に挿入すると、嵌合部材３により押圧されることで薄肉鋼管３３の一端部３５が拡径し、嵌合部材３の挿入が許容され、嵌合部材３と薄肉鋼管３３とが相互に嵌合される。嵌合が完了したときに、薄肉鋼管３３の一端部３５は縮径する方向に弾性復帰し、又は嵌合の際に塑性変形したときに、嵌合部材３との嵌合状態に保持され、摩擦力により嵌合部材３が薄肉鋼管３３内から抜け出ることのない状態に保持される。つまり、薄肉鋼管３３から嵌合部材３を引き抜くような力が加わったときには、弾性復帰によって薄肉鋼管３３の一端部３５の内周面が嵌合部材３の外周面を押圧していることにより、薄肉鋼管３３と嵌合部材３とが相対移動する嵌合方向に摩擦力が作用するので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部がケース１６を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００３３】
図９、図１０は、この発明の第４の実施の形態を示す図である。
図９、図１０において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２は、第１の実施の形態における嵌合部材３の凹凸４が、より目の粗い凹凸（第３の凹凸）４４とされている（凹部が深くされている）点を除けば、第１の実施の形態と同様の構成とされている。
【００３４】
雌型継手１２は、内周面に雄型継手２の嵌合部材３の凹凸４４と相互に嵌合するものであって、周方向に切欠を有しＣ字状に形成されて拡径可能な金属製の環状のスナップリング（被嵌合部材）４３と、スナップリング４３を保持する金属製のケース（固定部材）１６とから構成されている。スナップリング４３は、嵌合方向を含む面の断面が鋸歯状とされることで嵌合部材３の挿入が許容されると共に、凹凸４４の凹部に嵌合するよう構成されており、嵌合方向に積層して複数設けられている。ケース１６の内周面とスナップリング４３の外周面との間には、スナップリング４３の拡径が許容されるように所定の間隙が形成されている。ケース１６は、溶接等によって雌型継手板１７と一体に連結されており、ケース１６には、スナップリング４３を拡径可能に案内すると共に、嵌合部材３の雌ネジ部８に雄型増締ネジ１８を螺合して緊締したときに反力を得ることができるよう、挿通孔の形成された端板１９が設けられている。
【００３５】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３をスナップリング４３に挿入すると、嵌合部材３により押圧されることでスナップリング４３が拡径し、嵌合部材３の挿入が許容され、嵌合部材３とスナップリング４３とが相互に嵌合される。嵌合が完了したときに、スナップリング４３は縮径する方向に弾性復帰し、嵌合部材３との嵌合状態に保持され、嵌合部材３がスナップリング４３内から抜け出ることのない状態に保持される。つまり、スナップリング４３から嵌合部材３を引き抜くような力が加わったときには、押圧部材１５によって押圧されて嵌合部材３の凹凸４４の凹部にスナップリング４３が食い込んで嵌合方向に対して引っ掛かった状態にあるので、嵌合方向への抜け出しが抑制される。このとき、凹凸４４の目が第１の実施の形態より粗い（凹部が深い）ことで、第１の実施の形態と比べてより引っ掛かった状態にある。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部が端板１９を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００３６】
図１１、図１２は、この発明の第５の実施の形態を示す図である。
図１１、図１２において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２の嵌合部材３には、頭部５と反対側の端部から僅かに頭部５側に位置する箇所に、周方向に沿って一周する凹部５４が形成されている。
【００３７】
雌型継手１２は、雄型継手２の嵌合部材３の凹部５４と相互に嵌合するよう、周方向に切欠を有すると共に周方向の一端にテーパー面５２を有する拡径可能な金属製の円筒状の切欠円筒（被嵌合部材、凸部）５３と、切欠円筒５３を保持する金属製の環状のケース（固定部材）１６とから構成されている。ケース１６の内周面と切欠円筒５３の外周面との間には所定の間隙が形成され、この間隙により切欠円筒５３の拡径が許容されるようになっている。ケース１６は、溶接等によって雌型継手板１７と一体に連結されており、ケース１６には、切欠円筒５３を拡径可能に案内すると共に、嵌合部材３の雌ネジ部８に雄型増締ネジ１８を螺合して緊締したときに反力を得ることができるよう、挿通孔の形成された端板１９が設けられている。
【００３８】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を切欠円筒５３に挿入すると、嵌合部材３により押圧されることで切欠円筒５３が拡径し、嵌合部材３の挿入が許容され、嵌合部材３と切欠円筒５３とが相互に嵌合される。嵌合が完了したときに、切欠円筒５３は縮径する方向に弾性復帰し、嵌合部材３との嵌合状態に保持され、切欠円筒５３が凹部５４に引っ掛かることで嵌合部材３が切欠円筒５３内から抜け出ることのない状態に保持される。つまり、切欠円筒５３から嵌合部材３を引き抜くような力が加わったときには、弾性復帰によって切欠円筒５３が嵌合部材３の凹部５４に食い込んで嵌合方向に対して引っ掛かった状態にあるので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部が端板１９を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００３９】
図１３、図１４は、この発明の第６の実施の形態を示す図である。
図１３、図１４において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２は、第５の実施の形態と同様の構成とされている。
【００４０】
雌型継手１２は、雄型継手２の嵌合部材３の凹部５４と相互に嵌合する断面Ｓ字状の拡径可能な金属製の環状の引掛部材（被嵌合部材）６３と、引掛部材６３を保持する金属製の環状のケース（固定部材）１６とから構成されている。引掛部材６３の一端部６５は、ケース１６の周方向の一端に固定されており、嵌合部材３の雌ネジ部８に雄型増締ネジ１８を螺合して緊締したときに反力を得ることができるようになっている。引掛部材６３の他端部６６とケース１６の内周面との間には所定の間隙が形成され、この間隙により引掻部材６３の拡径が許容されるようになっている。ケース１６は、溶接等によって雌型継手板１７と一体に連結されている。
【００４１】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を引掛部材６３に挿入すると、嵌合部材３により押圧されることで引掛部材６３の他端部６６が拡径し、嵌合部材３の挿入が許容され、嵌合部材３と引掛部材６３とが相互に嵌合される。嵌合が完了したときに、引掛部材６３は縮径する方向に弾性復帰して引掛部材６３の他端部６６が嵌合部材３の凹部５４に引っ掛かり、嵌合部材３との嵌合状態に保持され、嵌合部材３が引掛部材６３内から抜け出ることのない状態に保持される。つまり、引掛部材６３から嵌合部材３を引き抜くような力が加わったときには、弾性復帰によって引掛部材６３が嵌合部材３の凹部５４に食い込んで嵌合方向に対して引っ掛かった状態にあるので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部が引掛部材６３の一端部６５を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００４２】
図１５、図１６は、この発明の第７の実施の形態を示す図である。
図１５、図１６において、第１の実施の形態と同様の符号を付したものは、同一のものを表し、その説明を簡略化する。すなわち、継手１は、第１の実施の形態と同様に、雄型継手２と、この雄型継手２と嵌合可能な雌型継手１２とを備えている。雄型継手２は、第１の実施の形態と同様の構成とされている。
【００４３】
雌型継手１２は、内周面に雄型継手２の嵌合部材３の凹凸４と相互に嵌合する断面鋸歯状の凹凸（第２の凹凸）７４が軸方向に沿って連続して設けられると共に周方向の一端にテーパー面７２を有する金属製の断面楔形の環状の被嵌合部材７３と、被嵌合部材７３の外周側に被嵌されると共に被嵌合部材７３が拡径するときに被嵌合部材７３を嵌合方向に移動自在に案内する金属製の断面楔形の環状の円筒部材７１と、被嵌合部材７３を嵌合方向に押圧するウレタンゴム等の弾性体からなる環状の押圧部材７５と、被嵌合部材７３、円筒部材７１及び押圧部材７５を保持する金属製のケース（固定部材）１６とから構成されている。ケース１６の内周面と被嵌合部材７３及び押圧部材７５の外周面との間には所定の間隙が形成され、この間隙により被嵌合部材７３の拡径が許容されるようになっている。ケース１６は、溶接等によって雌型継手板１７と一体に連結されており、ケース１６には、押圧部材７５を保持して被嵌合部材７３が移動する際の反力を得ることができるようにすると共に、嵌合部材３の雌ネジ部８に雄型増締ネジ１８を螺合して緊締したときに反力を得ることができるよう、挿通孔の形成された端板１９が設けられている。なお、被嵌合部材７３は、周方向に複数に分割されてよいものである。
【００４４】
上記の構成からなる継手１を用いて、第１の実施の形態と同様にセグメントを構成し、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を被嵌合部材７３に挿入すると、嵌合部材３により押圧されることで被嵌合部材７３が拡径し、嵌合部材３の挿入が許容され、嵌合部材３と被嵌合部材７３とが相互に嵌合される。嵌合が完了したときに、押圧部材７５により被嵌合部材７３が雄型継手２側へ押圧されて被嵌合部材７３が縮径し、嵌合部材３との嵌合状態に保持され、嵌合部材３が被嵌合部材７３内から抜け出ることのない状態に保持される。つまり、被嵌合部材７３から嵌合部材３を引き抜くような力が加わったときには、押圧部材７５によって押圧されて嵌合部材３の凹凸４の凸部（凹部）が被嵌合部材１３の凹凸７４の凹部（凸部）に互いに食い込んで嵌合方向に対して引っ掛かった状態にあるので、嵌合方向への抜け出しが抑制される。この状態でさらに雌ネジ部８に雄型増締ネジ１８を螺合して締め付けると、雄型増締ネジ１８の頭部が端板１９を押圧し、第１の実施の形態と同様の作用により、雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となる。これによって、幅方向に隣接する二つのセグメントが一体に接合されることになる。
【００４５】
以上、第１の実施の形態から第７の実施の形態の構成によれば、対向するセグメントの端面同士が互いに接触するまで嵌合部材３を被嵌合部材１３、２３、３３、４３、５３、６３、７３内に挿入すると、嵌合部材３と被嵌合部材１３、２３、３３、４３、５３、６３、７３との嵌合状態が保持されると共に、さらに嵌合部材３と雄型増締ネジ１８との協働作用により雄型継手板７と雌型継手板１７とが堅固に接合された状態で一体となることで、隣接する二つのセグメントが一体に接合される。この際、対向するセグメントの接合板の雄型継手２にはすでに嵌合部材３が設けられており、雌型継手１２には嵌合部材３を受け入れて嵌合する被嵌合部材１３が設けられていると共に、嵌合部材３は雄型増締ネジ１８により緊締されるので、隣接する二つのセグメント同士の接合が容易となると共に確実となり、接合強度を確保しつつ工期を短縮させることができる。
【００４６】
なお、上記の実施の形態では、嵌合部材３に雌ネジ部８を形成し、雌ネジ部８に螺合される雄型増締ネジ１８を設ける構成としたが、この雌ネジ部８に代わって嵌合部材３の先端から突出する雄ネジ部を設け、雄型増締ネジ１８に代わって雌型増締ネジ（ナット）を設けてもよい。
【００４７】
上記の各実施の形態で示した継手は、リング間接合をする例として説明したが、セグメントの施工方法を適宜選択することによって、トンネルの周方向におけるセグメントの接合（セグメント間継手としての接合）、及びトンネルの軸方向におけるセグメントの接合（リング間継手としての接合）の双方に使用することができるものである。
なお、この発明による継手を設けるセグメントは、スチール型セグメント、中詰コンクリート型セグメント、コンクリート型セグメント等各種のセグメントであってよい。
【００４８】
【発明の効果】
以上説明したように、請求項１に係る発明によれば、隣接する二つの部材、例えばトンネル等の堀削した部分の内面に設けられる複数のセグメントの隣接するもの同士の接合に適用した場合には、隣接する一方のセグメントの雄型継手と他方のセグメントの雌型継手とを相互に嵌合させることで、両セグメントが一体に接合されることになる。つまり、雌型継手が拡径することにより雄型継手との嵌合が許容され、嵌合完了後に雌型継手が縮径することにより雄型継手との嵌合状態に保持され、隣接する二つの部材が一体に接合されると共に、さらに雄型増締ネジを雌ネジ部に螺合して締め付けることにより堅固に保持される。この際、対向するセグメントの接合板の雄型継手にはすでに嵌合部材が設けられており、雌型継手には嵌合部材を受け入れて嵌合する被嵌合部材が設けられていると共に、嵌合部材は雄型増締ネジにより緊締されるので、隣接する二つのセグメント同士の接合が容易となると共に確実となり、接合強度を確保しつつ工期を短縮させることができる。
【００４９】
また、請求項２に係る発明によれば、雄型継手と雌型継手とは、嵌合部材の第１の凹凸と被嵌合部材の第２の凹凸とによって相互に嵌合されるので、被嵌合部材から嵌合部材を引き抜くような力が加わった場合であっても、被嵌合部材が嵌合部材に引っ掛かった状態にあることで、雄型増締ネジで緊締する前に被嵌合部材から嵌合部材が抜け出すことを抑制することができる。
【００５０】
また、請求項３に係る発明によれば、雄型継手と雌型継手とは、嵌合部材の第３の凹凸の凹部に被嵌合部材が食い込むことで嵌合されるが、この凹部は第１の凹凸の凹部と比べて目が粗く（凹部が深く）形成されているので、被嵌合部材から嵌合部材を引き抜くような力が加わった場合の嵌合部材に対する被嵌合部材の引っ掛かりがより堅固となることで、雄型増締ネジで緊締する前に被嵌合部材から嵌合部材が抜け出すことをさらに抑制することができる。
【００５１】
また、請求項４に係る発明によれば、雄型継手と雌型継手とは、嵌合部材の凹部に被嵌合部材の凸部が嵌合されるので、被嵌合部材から嵌合部材を引き抜くような力が加わった場合であっても、被嵌合部材が嵌合部材に引っ掛かった状態にあることで、雄型増締ネジで緊締する前に被嵌合部材から嵌合部材が抜け出すことを抑制することができる。また、雄型継手の接合面と雌型継手の接合面とが互いに接触したときに初めて嵌合されるので、例えば雄型継手板と雌型継手板とにそれぞれ複数の嵌合部材と被嵌合部材とを設けて両者を接合する場合に、それぞれの嵌合部材と被嵌合部材との相対位置を調整しながら両者を接合することができる。
【００５２】
また、請求項５に係る発明によれば、雄型継手の嵌合部材を雌型継手の被嵌合部材が押圧するので、被嵌合部材から嵌合部材を引き抜くような力が加わった場合であっても、被嵌合部材と嵌合部材との間に摩擦力が作用することで、雄型増締ネジで緊締する前に被嵌合部材から嵌合部材が抜け出すことを抑制することができる。また、鋸歯状に形成された凹凸の引っ掛かりによる嵌合における凹凸の形状を現場で調整することに比べて、押圧による嵌合における押圧される接触面を現場で調整することの方が容易であるので、比較容易に嵌合力を調整することができる。
【図面の簡単な説明】
【図１】この発明の第１の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図２】この発明の第１の実施形態に係る継手を示す図であって、接合途中の断面図である。
【図３】この発明の第１の実施形態に係る継手を示す図であって、接合後の状態の断面図である。
【図４】この発明の第１の実施形態に係る継手における被嵌合部材を示す断面図である。
【図５】この発明の第２の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図６】この発明の第２の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図７】この発明の第３の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図８】この発明の第３の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図９】この発明の第４の実施形態に係る継手を示すで図あって、接合前の状態の断面図である。
【図１０】この発明の第４の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図１１】この発明の第５の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図１２】この発明の第５の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図１３】この発明の第６の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図１４】この発明の第６の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図１５】この発明の第７の実施形態に係る継手を示す図であって、接合前の状態の断面図である。
【図１６】この発明の第７の実施形態に係る継手を示す図であって、接合途中の状態の断面図である。
【図１７】従来の継手が適用されるセグメントを示す概略全体図である。
【符号の説明】
１　　　継手
２　　　雄型継手
３　　　嵌合部材
４　　　凹凸（第１の凹凸）
８　　　雌ネジ部
１２　　　雌型継手
１３、７３　　　被嵌合部材
１４、７４　　　凹凸（第２の凹凸）
１５、７５　　　押圧部材
１６　　　ケース（固定部材）
１８　　　雄型増締ネジ
２３、３３　　　薄肉鋼管（被嵌合部材）
４３　　　スナップリング（被嵌合部材）
４４　　　凹凸（第３の凹凸）
５３　　　切欠円筒（被嵌合部材、凸部）
５４　　　凹部
６３　　　引掛部材（被嵌合部材）
６６　　　他端部（凸部）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a joint, and more particularly to a joint effective for integrally joining two adjacent members together, for example, adjacent ones of a plurality of segments provided on an inner surface of a dug portion such as a subway tunnel.
[0002]
[Prior art]
Generally, when constructing a subway tunnel etc. by shield method, etc., segments such as steel type segments, filled concrete type segments, concrete type segments etc. are provided on the inner surface of the excavated portion, and the excavated portion is covered. , Support.
[0003]
An example of such a segment is shown in FIG. The segment 101 is a steel-type segment, and is a rectangular plate-shaped metal longitudinal joining plate 103a, 103b provided integrally on both longitudinal end surfaces of a segment main body 102, and both ends in the width direction of the segment main body 102. And metal-made widthwise joining plates 104a and 104b in the form of an arc plate provided integrally on the surface. Screws are inserted into each of the longitudinal joining plates 103a and 103b and each of the widthwise joining plates 104a and 104b. Passage holes 105a, 105b and 106a, 106b are provided in a penetrating state.
[0004]
Then, the segment 101 having the above configuration is continuously provided in the circumferential direction on the inner surface of the excavated portion such as a tunnel, and the joint between the screw insertion holes 105a and 105b of the longitudinal joining plates 103a and 103b is provided. A bolt (not shown) is inserted, a nut (not shown) of a joint is screwed into a screw portion of the bolt, and the segments 101, 101 adjacent in the circumferential direction are integrally joined (joining between segments). A ring-shaped segment ring body (not shown) is formed on the same circumference.
[0005]
Then, such segment ring bodies are provided continuously in the excavation direction, and the segments 101, 101 of the segment ring bodies adjacent in the excavation direction are integrally joined (joint between rings) by a similar method, and excavation is performed. The entire inner surface of the portion is covered with a plurality of segments 101, 101. Thus, the inner surface of the excavated portion can be supported by the plurality of segments 101, 101,... (For example, see Patent Document 1).
[0006]
[Patent Document 1]
JP 2001-140596 A
[0007]
[Problems to be solved by the invention]
By the way, in the conventional segment 101, for example, bolts are inserted into the holes 106a and 106b for screw insertion of the width direction joint plates 104a and 104b at a plurality of locations of the steel segment main body 102 at a building site. Since an extremely complicated operation of screwing and tightening the nut is required, there is a problem that the working efficiency is poor and the construction period is prolonged.
[0008]
The present invention has been made in view of such circumstances, and has as its object the case where it is used for joining two adjacent members, for example, a plurality of segments provided on the inner surface of an excavated portion such as a tunnel. Another object of the present invention is to provide a joint that enables easy joining of adjacent segments, secures joint strength, improves work efficiency, and shortens the construction period.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 is a joint for integrally joining two adjacent members, wherein the male joint provided on one member and the male joint provided on the other member and mutually engaged with the male joint. A female joint, wherein the female joint expands during fitting with the male joint to allow the fitting with the male joint, and reduces the diameter after the fitting is completed. The male joint is configured to hold a fitted state, and the male joint is formed with a female screw portion having a center axis in the fitting direction at a distal end thereof, and the female screw portion includes: A male tightening screw which is engaged with the fixing member and screwed into the female screw portion is provided.
[0010]
ADVANTAGE OF THE INVENTION According to the joint which concerns on this invention, when the male joint of one member and the female joint of the other member mutually fit, the fitting with a male joint is performed by expanding a female joint diameter. Allowed, the female joint is reduced in diameter after the fitting is completed, the fitting state with the male joint is maintained, the two adjacent members are joined together, and the male screw is further tightened to the female screw part By screwing and tightening the screws, they are firmly joined. Therefore, the joining between two adjacent segments becomes easy and reliable, and the construction period can be significantly reduced while securing the joining strength.
[0011]
The invention according to claim 2 is the joint according to claim 1, wherein the male joint has a first unevenness provided on an outer peripheral surface and a female screw portion having a center axis in the fitting direction at a distal end thereof. The female joint has a fitting member formed, and the female joint has an inner peripheral surface provided with second irregularities that are mutually fitted with the first irregularities, and is divided into a plurality in the circumferential direction to increase the diameter. A possible member to be fitted, and a pressing member that presses the member to be fitted in a direction to reduce the diameter of the member, wherein the member to be fitted is attached to the pressing member when the member is fitted with the fitting member. It is configured such that the diameter is increased to oppose the fitting with the fitting member, and after the fitting is completed, the diameter is reduced by being pressed by the pressing member and the fitting state with the fitting member is maintained. It is characterized by the following.
[0012]
According to the joint according to the present invention, when the first unevenness of the fitting member of the male joint and the second unevenness of the fitted member of the female joint mutually fit, When the fitting member expands in diameter against the pressing member, the fitting with the fitting member of the male joint is allowed. After the fitting, the fitted member is pressed by the pressing member to reduce the diameter. It is held in a fitted state with the mating member, and is further firmly joined by screwing and tightening a male tightening screw to the female screw portion.
[0013]
According to a third aspect of the present invention, in the joint according to the first aspect, the male joint is provided with a third unevenness on an outer peripheral surface, and a female screw portion having a center axis in the fitting direction is provided at a distal end thereof. The female joint has a fitting member formed, and the female joint fits into the concave portion of the third unevenness on the inner peripheral surface, and has a notch in the circumferential direction to expand the diameter of the fitted member. The fitted member has a diameter that is increased upon fitting with the fitting member to allow fitting with the fitting member, and after fitting is completed, the diameter of the fitted member is reduced by elastic return. It is characterized in that it is configured to hold the fitted state with the joining member.
[0014]
According to the joint according to the present invention, the fitted member of the female joint is elastically deformed when the fitted member of the female joint is fitted into the concave portion of the third unevenness of the fitting member of the male joint. The fitting with the fitting member of the male joint is allowed by expanding the diameter, and the fitted member returns elastically after the fitting, and the diameter of the fitted member is reduced, and the fitted member is caught in the concave portion of the fitting member. As a result, the male member is held in a state of being fitted to the fitting member, and furthermore, a male tightening screw is screwed into the female screw portion to be tightly joined.
[0015]
The invention according to claim 4 is the joint according to claim 1, wherein the male joint has a fitting member provided with a concave portion on an outer peripheral surface and the female screw portion provided at a tip end thereof. The mold joint is provided with a convex portion that is fitted to the concave portion and has a fitted member that can be expanded in diameter, and the fitted member expands when fitted with the fitting member. It is characterized in that it is configured to allow the fitting with the fitting member by diameter, and to reduce the diameter by elastic return after the completion of the fitting to maintain the fitted state with the fitting member.
[0016]
ADVANTAGE OF THE INVENTION According to the joint which concerns on this invention, when the convex part of the fitting member of a female joint fits into the recessed part of the fitting member of a male joint, the fitting member of a female joint expands by elastic deformation. Due to the diameter, the fitting of the male joint with the fitting member is allowed, and after the fitting, the fitted member is elastically restored and the diameter is reduced, and the convex portion of the fitted member is caught by the concave portion of the fitting member. As a result, the female member is held in a fitted state, and the female screw portion is firmly joined by screwing and tightening a male additional screw.
[0017]
The invention according to claim 5 is the joint according to claim 1, wherein the male joint has a fitting member provided with the female screw portion on an inner peripheral surface, and the female joint includes the fitting member. And the fitted member is fitted with the fitting member, the fitted member expands in diameter at the time of fitting with the fitting member, and allows fitting with the fitting member. It is characterized in that it is configured to maintain the fitted state with the fitting member by reducing the diameter by elastic return after completion or by friction with the fitting member after plastic deformation.
[0018]
ADVANTAGE OF THE INVENTION According to the joint which concerns on this invention, when the fitting member of a male joint and the fitting member of a female joint mutually fit, the fitting member of a female joint expands by elastic deformation. By this, the fitting of the male joint with the fitting member is allowed, and after the fitting, the fitted member is elastically restored and the diameter is reduced, and the fitted member presses the fitting member to form the fitting member. And the male screw is screwed into the female screw portion and tightened to firmly join. Alternatively, at the time of fitting with each other, the fitted member of the female joint expands in diameter by plastic deformation, so that fitting with the fitting member of the male joint is allowed, and fitting with the fitting member is allowed. It is held in the fitted state with the mating member, and is similarly firmly joined by screwing and tightening a male tightening screw to the female screw portion.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 to FIG. 4 are views showing a first embodiment of the present invention.
1 to 4, a joint 1 joins two adjacent members together and includes a male joint 2 and a female joint 12 that can be fitted to the male joint 2. I have.
[0020]
The male joint 2 has a metal rod-shaped fitting member having a concave-convex (first concave-convex) 4 having a saw-tooth cross-section on the outer peripheral surface of the distal end portion continuously provided along the axial direction and having a head 5 at one end. 3 and a metal male joint plate 7 that supports the fitting member 3, and the fitting member 3 and the male joint plate 7 are integrally connected by welding or the like. At the other end of the fitting member 3, a female screw portion 8 having a fitting direction as a central axis is formed.
[0021]
The female joint 12 has, on its inner peripheral surface, irregularities (second irregularities) 14 having a sawtooth cross-section that are mutually fitted with the irregularities 4 of the fitting member 3 of the male joint 2 and are continuously provided in the axial direction. And a metal ring-shaped fitted member 13 which is divided into a plurality of pieces (five in this embodiment) in the circumferential direction and whose diameter can be enlarged, and is fitted on the outer peripheral side of the fitted member 13. At the same time, an annular pressing member 15 made of an elastic body such as urethane rubber which presses the fitted member 13 in a direction to reduce the diameter to hold the fitted member 13 in an annular shape, and the fitted member 13 and the pressing member 15 And a metal case (fixing member) 16 for holding A predetermined gap is formed between the inner peripheral surface of the case 16 and the outer peripheral surface of the pressing member 15, and the gap allows the enlarged diameter of the member 13 to be fitted. The case 16 is integrally connected to the female joint plate 17 by welding or the like. An end plate 19 having an insertion hole is provided so that a reaction force can be obtained when the mold tightening screw 18 is screwed and tightened. Note that the number of divisions of the fitted member 13 is not limited to five and may be any number as long as it is plural.
[0022]
Using the joint 1 composed of the male joint 2 and the female joint 12 configured as described above, two adjacent members, for example, a plurality of adjacent segments provided on the inner surface of a dug portion such as a tunnel. As shown in FIG. 17 as a conventional example, in the case of a steel-type segment 101, the joints 103a, 103b, 104a, and 104b of the segment 101 (both longitudinal joints) can be joined together. The male joint 2 and the female joint 12 are provided at both the joints 103a, 103b and the widthwise joints 104a, 104b).
[0023]
Specifically, for example, in the case of inter-ring joining, the male joint 2 is provided at one joint 104a in the width direction of the segment 101, and the female joint 12 is provided at the other joint 104b in the width direction. In this case, the male joint plate 7 constitutes one width direction joining plate 104a, and the female joint plate 12 constitutes the other width direction joining portion 104b. The female joint 12 may be provided at one joint 104a in the width direction, and the male joint 2 may be provided at the other joint 104b in the width direction.
[0024]
In order to join the segments having the above configuration to each other, the segments are positioned on the inner surface of a dug portion such as a tunnel, and as shown in FIG. 1, the circumferential end surfaces of two longitudinally adjacent segments are joined to each other. As shown in FIG. 2, the fitting member 3 of the male joint 2 of one segment is inserted into the fitted member 13 of the female joint 12 of the other segment, as shown in FIG. Insert until the opposing end faces contact each other.
[0025]
In this state, by being pressed by the fitting member 3, the fitted member 13 expands in diameter against the pressing member 15, and the insertion of the fitting member 3 is allowed. The irregularities 14 of the fitting member 13 are fitted to each other. When the fitting is completed, the fitted member 13 is pressed in the direction in which the diameter of the fitted member 13 is reduced by the pressing member 15, whereby the fitted member 13 is held in a ring shape and held in the fitted state with the fitting member 2. Thus, the fitting member 3 is held in a state where it does not come out of the fitted member 13. That is, when a force is applied to pull out the fitting member 3 from the fitted member 13, the protrusion (recess) of the unevenness 4 of the fitting member 3 is pressed by the pressing member 15 and the unevenness of the fitted member 13 is reduced. Since it is in a state of being caught in the fitting direction by biting into the concave portions (convex portions) of the fourteenth, it is possible to suppress the escape in the fitting direction. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the end plate 19 and the head 5 and the male tightening screw 18 are pressed. And the distance in the fitting direction is shortened. At this time, a reaction force is obtained from the case 16 disposed between the head 5 and the male tightening screw 18 so that the male joint plate 7 and the female joint plate 17 are firmly joined. Become one.
[0026]
As a result, two segments adjacent in the width direction are integrally joined. By thus sequentially providing the segment ring bodies in the excavation direction, the entire inner surface of the excavated portion can be covered and supported by a plurality of segments.
[0027]
FIG. 5 and FIG. 6 are views showing a second embodiment of the present invention.
In FIGS. 5 and 6, the same reference numerals as in the first embodiment denote the same components, and the description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. The male joint 2 has the same configuration as that of the first embodiment except that the projections and depressions 4 are not provided on the fitting member 3.
[0028]
The female joint 12 has an annular case (fixing member) 16 made of metal and an annular thin wall made of thin steel which is brought into contact with the inner peripheral surface of the case 16 and elastically deformable in a direction perpendicular to the fitting direction. And a steel pipe (fitted member) 23. The case 16 is configured such that its inner diameter is substantially the same as the inner diameter of the insertion hole formed in the female joint plate 17, and is integrally connected to the female joint plate 17 by welding or the like. The thin-walled steel pipe 23 is configured such that both ends in a direction perpendicular to the axial direction increase in diameter as going outward, and both ends are respectively connected to the inner peripheral surface of the insertion hole of the female joint plate 17 and the case 16. Is in contact with the inner peripheral surface of the A projection 22 is provided on the inner peripheral surface of the case 16, so that movement of the thin steel pipe 23 in the fitting direction is prevented.
[0029]
When the joint 1 having the above-described configuration is used to form a segment in the same manner as in the first embodiment, and the fitting member 3 is inserted into the thin steel pipe 23 until the end faces of the opposing segments are in contact with each other, the fitting is completed. By being pressed by the member 3, the axial center portion of the thin steel pipe 23 expands in diameter and insertion of the fitting member 3 is allowed, and the fitting member 3 and the thin steel pipe 23 are fitted to each other. When the fitting is completed, the axial center portion of the thin steel pipe 23 is elastically returned in the direction in which the diameter is reduced, or is held in a fitted state with the fitting member 3 when it is plastically deformed at the time of fitting. Thus, the fitting member 3 is kept in a state where it does not come off from the thin steel pipe 23 due to frictional force. In other words, when a force that pulls out the fitting member 3 from the thin steel pipe 23 is applied, the inner peripheral surface of the thin steel pipe 23 presses the outer peripheral surface of the fitting member 3 by elastic recovery, so that the thin steel pipe 23 Since the frictional force acts in the fitting direction in which the fitting member 3 relatively moves, the escape in the fitting direction is suppressed. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the case 16 and the same operation as in the first embodiment is performed. The male joint plate 7 and the female joint plate 17 are integrally joined in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0030]
7 and 8 show a third embodiment of the present invention.
7 and 8, the same reference numerals as those in the first embodiment denote the same components, and a description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. The male joint 2 has the same configuration as that of the second embodiment.
[0031]
The female joint 12 has an annular case (fixing member) 16 made of metal and an annular shape having a substantially L-shaped cross section made of thin steel fixed to the case 16 and elastically deformable in a direction perpendicular to the fitting direction. And a thin steel pipe (fitted member) 33. The case 16 is configured such that its inner diameter is substantially the same as the inner diameter of the insertion hole formed in the female joint plate 17, and is integrally formed with the female joint plate 17 with a thin steel pipe 33 interposed by welding or the like. Are linked. The thin-walled steel pipe 33 is configured such that one end 35 in a direction perpendicular to the axial direction decreases in diameter as going outward, and the other end 36 increases in diameter as going outward and fits in the fitting direction. It is configured to have an orthogonal surface. The case 16 and the female joint plate 17 are connected via the other end 36.
[0032]
Using the joint 1 having the above configuration, a segment is formed in the same manner as in the first embodiment, and when the fitting member 3 is inserted into the thin steel pipe 33 until the end faces of the opposing segments come into contact with each other, the fitting is completed. One end 35 of thin steel pipe 33 is expanded by being pressed by member 3, insertion of fitting member 3 is allowed, and fitting member 3 and thin steel pipe 33 are fitted to each other. When the fitting is completed, the one end 35 of the thin-walled steel pipe 33 elastically returns in the direction in which the diameter is reduced, or is plastically deformed at the time of fitting, and is held in a fitted state with the fitting member 3, The fitting member 3 is held in a state where it does not come out of the thin steel pipe 33 due to the frictional force. That is, when a force that pulls out the fitting member 3 from the thin steel pipe 33 is applied, the inner peripheral surface of the one end 35 of the thin steel pipe 33 presses the outer peripheral surface of the fitting member 3 by elastic return. Since the frictional force acts in the fitting direction in which the thin steel pipe 33 and the fitting member 3 relatively move, the slip-out in the fitting direction is suppressed. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the case 16 and the same operation as in the first embodiment is performed. The male joint plate 7 and the female joint plate 17 are integrally joined in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0033]
FIGS. 9 and 10 show a fourth embodiment of the present invention.
In FIGS. 9 and 10, the same reference numerals as in the first embodiment denote the same components, and a description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. The male joint 2 is different from the first embodiment in that the unevenness 4 of the fitting member 3 in the first embodiment is a coarser unevenness (third unevenness) 44 (the concave portion is deepened). , The configuration is the same as that of the first embodiment.
[0034]
The female joint 12 has a notch in the circumferential direction and is formed in a C-shape, and the diameter of the female joint 12 can be increased by fitting the concave and convex 44 of the fitting member 3 of the male joint 2 on the inner peripheral surface. An annular metal snap ring (member to be fitted) 43 and a metal case (fixing member) 16 for holding the snap ring 43 are provided. The snap ring 43 has a saw-tooth cross-section on a surface including the fitting direction, so that the insertion of the fitting member 3 is allowed, and the snap ring 43 is configured to fit into the concave portion of the unevenness 44. And a plurality of such layers are provided. A predetermined gap is formed between the inner peripheral surface of the case 16 and the outer peripheral surface of the snap ring 43 so that the diameter of the snap ring 43 can be increased. The case 16 is integrally connected to the female joint plate 17 by welding or the like. The case 16 guides the snap ring 43 so as to be able to expand in diameter, and the male screw is added to the female screw portion 8 of the fitting member 3. An end plate 19 having an insertion hole is provided so that a reaction force can be obtained when the tightening screw 18 is screwed and tightened.
[0035]
A segment is formed using the joint 1 having the above-described configuration in the same manner as in the first embodiment, and when the fitting member 3 is inserted into the snap ring 43 until the end faces of the opposing segments contact each other, the fitting is completed. The snap ring 43 is expanded in diameter by being pressed by the member 3, the insertion of the fitting member 3 is allowed, and the fitting member 3 and the snap ring 43 are fitted to each other. When the fitting is completed, the snap ring 43 resiliently returns in the direction of reducing the diameter, and is held in a fitted state with the fitting member 3 so that the fitting member 3 does not come out of the snap ring 43. Will be retained. That is, when a force for pulling out the fitting member 3 from the snap ring 43 is applied, the snap ring 43 is pressed by the pressing member 15 and cuts into the concave portion of the unevenness 44 of the fitting member 3 and is hooked in the fitting direction. Since it is in the closed state, the escape in the fitting direction is suppressed. At this time, since the irregularities 44 are coarser (the concave portions are deeper) than in the first embodiment, they are more caught than in the first embodiment. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the end plate 19, and the same operation as in the first embodiment. Thereby, the male joint plate 7 and the female joint plate 17 are united in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0036]
FIG. 11 and FIG. 12 are views showing a fifth embodiment of the present invention.
11 and 12, the same reference numerals as those in the first embodiment denote the same components, and the description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. In the fitting member 3 of the male joint 2, a concave portion 54 is formed in a position which is slightly closer to the head 5 from the end opposite to the head 5 and extends around the circumference.
[0037]
The female joint 12 has a notch in the circumferential direction and has a tapered surface 52 at one end in the circumferential direction so as to be mutually fitted with the concave portion 54 of the fitting member 3 of the male joint 2. It is composed of a cylindrical cutout cylinder (fitted member, convex portion) 53 and an annular metal case (fixing member) 16 that holds the cutout cylinder 53. A predetermined gap is formed between the inner peripheral surface of the case 16 and the outer peripheral surface of the notched cylinder 53, and the diameter of the notched cylinder 53 can be increased by this gap. The case 16 is integrally connected to the female joint plate 17 by welding or the like. The case 16 guides the cutout cylinder 53 so that the diameter thereof can be expanded, and the male screw is added to the female screw portion 8 of the fitting member 3. An end plate 19 having an insertion hole is provided so that a reaction force can be obtained when the tightening screw 18 is screwed and tightened.
[0038]
Using the joint 1 having the above-described configuration, a segment is formed in the same manner as in the first embodiment, and the fitting member 3 is inserted into the notched cylinder 53 until the end faces of the opposing segments contact each other. By being pressed by the member 3, the notch cylinder 53 expands in diameter, the insertion of the fitting member 3 is allowed, and the fitting member 3 and the notch cylinder 53 are fitted to each other. When the fitting is completed, the notched cylinder 53 elastically returns in the direction of reducing the diameter, is held in the fitted state with the fitting member 3, and the notched cylinder 53 is caught by the concave portion 54 so that the fitting member 3 is notched. It is kept in a state where it does not fall out of the cylinder 53. That is, when a force that pulls out the fitting member 3 from the notched cylinder 53 is applied, the notched cylinder 53 bites into the concave portion 54 of the fitting member 3 and is caught in the fitting direction by elastic return. Withdrawal in the fitting direction is suppressed. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the end plate 19, and the same operation as in the first embodiment. Thereby, the male joint plate 7 and the female joint plate 17 are united in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0039]
FIG. 13 and FIG. 14 are views showing a sixth embodiment of the present invention.
13 and 14, the same reference numerals as in the first embodiment denote the same components, and a description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. The male joint 2 has the same configuration as that of the fifth embodiment.
[0040]
The female joint 12 has an S-shaped cross-sectionally expandable metal annular hooking member (member to be fitted) 63 that is mutually engaged with the concave portion 54 of the fitting member 3 of the male joint 2, and a hooking member. And a metal annular case (fixing member) 16 for holding the member 63. One end 65 of the hooking member 63 is fixed to one end in the circumferential direction of the case 16, and exerts a reaction force when the male tightening screw 18 is screwed into the female screw portion 8 of the fitting member 3 and tightened. You can get it. A predetermined gap is formed between the other end portion 66 of the hooking member 63 and the inner peripheral surface of the case 16, and the gap allows the diameter of the scratching member 63 to be increased. The case 16 is integrally connected to the female joint plate 17 by welding or the like.
[0041]
When the joint 1 having the above-described configuration is used to form a segment in the same manner as in the first embodiment, and the fitting member 3 is inserted into the hooking member 63 until the end faces of the opposing segments contact each other, the fitting By being pressed by the member 3, the other end portion 66 of the hooking member 63 expands in diameter, the insertion of the fitting member 3 is allowed, and the fitting member 3 and the hooking member 63 are mutually fitted. When the fitting is completed, the hooking member 63 returns elastically in the direction of reducing the diameter, and the other end 66 of the hooking member 63 is hooked on the concave portion 54 of the fitting member 3, so that the fitting state with the fitting member 3 is established. The fitting member 3 is held in a state where it does not come out of the hooking member 63. That is, when a force that pulls out the fitting member 3 from the hooking member 63 is applied, the hooking member 63 bites into the recess 54 of the fitting member 3 and is hooked in the fitting direction by elastic return. Withdrawal in the fitting direction is suppressed. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the one end 65 of the hooking member 63, and the first embodiment is performed. By the same operation as described above, the male joint plate 7 and the female joint plate 17 are united in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0042]
FIGS. 15 and 16 show a seventh embodiment of the present invention.
15 and 16, the same reference numerals as in the first embodiment denote the same components, and a description thereof will be simplified. That is, the joint 1 includes the male joint 2 and the female joint 12 that can be fitted to the male joint 2 as in the first embodiment. The male joint 2 has the same configuration as that of the first embodiment.
[0043]
The female joint 12 has, on its inner peripheral surface, irregularities (second irregularities) 74 having a sawtooth cross-section that are mutually fitted with the irregularities 4 of the fitting member 3 of the male joint 2 and are continuously provided in the axial direction. And a metal-made annular wedge-shaped fitted member 73 having a tapered surface 72 at one end in the circumferential direction. The fitted member 73 is fitted on the outer peripheral side of the fitted member 73, and the fitted member 73 expands in diameter. It is made of a metal-made annular cylindrical member 71 having a wedge-shaped cross section for guiding the fitted member 73 movably in the fitting direction, and an elastic body such as urethane rubber for pressing the fitted member 73 in the fitting direction. It is composed of an annular pressing member 75 and a metal case (fixing member) 16 that holds the fitted member 73, the cylindrical member 71 and the pressing member 75. A predetermined gap is formed between the inner peripheral surface of the case 16 and the outer peripheral surfaces of the fitted member 73 and the pressing member 75, and the gap allows the diameter of the fitted member 73 to be increased. I have. The case 16 is integrally connected to the female joint plate 17 by welding or the like, so that the case 16 can hold the pressing member 75 and obtain a reaction force when the fitted member 73 moves. In addition, an end plate 19 having an insertion hole is provided so that a reaction force can be obtained when the male tightening screw 18 is screwed into the female screw portion 8 of the fitting member 3 and tightened. ing. The fitted member 73 may be divided into a plurality in the circumferential direction.
[0044]
Using the joint 1 having the above configuration, a segment is formed in the same manner as in the first embodiment, and the fitting member 3 is inserted into the fitted member 73 until the end faces of the opposing segments contact each other. By being pressed by the fitting member 3, the fitted member 73 expands in diameter, the insertion of the fitting member 3 is allowed, and the fitting member 3 and the fitted member 73 are fitted to each other. When the fitting is completed, the fitted member 73 is pressed toward the male joint 2 by the pressing member 75, the diameter of the fitted member 73 is reduced, and the fitting state with the fitting member 3 is maintained. The fitting member 3 is held in a state where it does not come out of the fitted member 73. That is, when a force that pulls out the fitting member 3 from the fitted member 73 is applied, the protrusion (recess) of the unevenness 4 of the fitting member 3 is pressed by the pressing member 75 and Since it is in a state of being caught in the fitting direction by biting into the concave portions (convex portions) of 74, slipping out in the fitting direction is suppressed. In this state, when the male tightening screw 18 is further screwed into the female screw portion 8 and tightened, the head of the male tightening screw 18 presses the end plate 19, and the same operation as in the first embodiment. Thereby, the male joint plate 7 and the female joint plate 17 are united in a state where they are firmly joined. As a result, two segments adjacent in the width direction are integrally joined.
[0045]
As described above, according to the configurations of the first to seventh embodiments, the fitting member 3 is connected to the fitted members 13, 23, 33, 43, 53 until the end faces of the opposing segments contact each other. , 63, 73, the fitting state between the fitting member 3 and the fitted members 13, 23, 33, 43, 53, 63, 73 is maintained, and further, the fitting member 3 and the male By cooperating with the tightening screw 18, the male joint plate 7 and the female joint plate 17 are integrally joined in a firmly joined state, so that two adjacent segments are joined integrally. At this time, the fitting member 3 is already provided at the male joint 2 of the joining plate of the opposing segments, and the fitted member 13 which receives and fits the fitting member 3 is provided at the female joint 12. In addition, since the fitting member 3 is tightened by the male tightening screw 18, the joining between the two adjacent segments becomes easy and reliable, and the construction period can be shortened while securing the joining strength. it can.
[0046]
In the above-described embodiment, the female screw portion 8 is formed on the fitting member 3 and the male tightening screw 18 screwed to the female screw portion 8 is provided. Alternatively, a male screw portion protruding from the tip of the fitting member 3 may be provided, and a female tightening screw (nut) may be provided instead of the male tightening screw 18.
[0047]
The joints described in the above embodiments have been described as examples in which ring-to-ring joints are used. However, by appropriately selecting a segment construction method, joining of segments in the circumferential direction of the tunnel (joining as inter-segment joints). And joining of the segments in the axial direction of the tunnel (joining as a joint between rings).
The segment provided with the joint according to the present invention may be various segments such as a steel segment, a filled concrete segment, and a concrete segment.
[0048]
【The invention's effect】
As described above, according to the first aspect of the invention, when applied to the joining of two adjacent members, for example, a plurality of adjacent segments of a plurality of segments provided on the inner surface of a dug portion such as a tunnel. By fitting the male joint of one adjacent segment and the female joint of the other segment, the two segments are integrally joined. That is, the female joint is allowed to be fitted with the male joint by expanding in diameter, and the female joint is reduced in diameter after the fitting is completed, so that the female joint is held in the fitted state with the male joint, and the adjacent two The two members are joined together, and are firmly held by further screwing and tightening a male tightening screw into the female screw portion. At this time, a fitting member is already provided at the male joint of the joining plate of the opposing segments, and a female member is provided at the female joint to receive and fit the fitting member. Since the fitting member is tightened by the male tightening screw, the joining between two adjacent segments becomes easy and reliable, and the construction period can be shortened while securing the joining strength.
[0049]
According to the second aspect of the present invention, the male joint and the female joint are mutually fitted by the first unevenness of the fitting member and the second unevenness of the fitted member. Even when a force is applied to pull out the fitting member from the fitting member, the fitting member is hooked on the fitting member, so that the fitting member is tightened before tightening with the male tightening screw. It is possible to prevent the fitting member from coming off the fitting member.
[0050]
According to the third aspect of the present invention, the male joint and the female joint are fitted by the fitted member biting into the recess of the third unevenness of the fitting member. Since the first concave and convex portions are formed coarser than the concave portion (the concave portion is deep), the fitting member with respect to the fitting member when a force is applied to pull out the fitting member from the fitted member. By making the hook more firm, it is possible to further prevent the fitting member from coming off the fitted member before tightening with the male tightening screw.
[0051]
According to the fourth aspect of the present invention, since the male joint and the female joint are configured such that the convex portion of the fitted member is fitted into the concave portion of the fitting member, the fitting member is moved from the fitted member to the fitting member. Even when a force such as pulling out is applied, the fitting member is in a state of being caught by the fitting member, so that the fitting member is removed from the fitting member before being tightened by the male tightening screw. Getting out can be suppressed. Also, since the mating surface of the male joint and the mating surface of the female joint are fitted only when they come into contact with each other, for example, a plurality of mating members are fitted to the male joint plate and the female joint plate, respectively. When the joining member is provided and the two members are joined, the two members can be joined while adjusting the relative positions of the respective fitting members and the fitted members.
[0052]
According to the fifth aspect of the present invention, since the fitting member of the male joint presses the fitting member of the male joint, a force is applied to pull out the fitting member from the fitting member. Even when the frictional force acts between the fitted member and the fitting member, it is possible to prevent the fitting member from coming out of the fitted member before tightening with the male tightening screw. Can be. In addition, it is easier to adjust the contact surface to be pressed in the fitting by pressing on site than to adjust the shape of the unevenness in the fitting by hooking the unevenness formed in the sawtooth shape on site. Therefore, the fitting force can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is a view showing a joint according to a first embodiment of the present invention, and is a cross-sectional view in a state before joining.
FIG. 2 is a view showing the joint according to the first embodiment of the present invention, and is a cross-sectional view in the middle of joining.
FIG. 3 is a view showing the joint according to the first embodiment of the present invention, and is a cross-sectional view in a state after joining.
FIG. 4 is a cross-sectional view showing a member to be fitted in the joint according to the first embodiment of the present invention.
FIG. 5 is a view showing a joint according to a second embodiment of the present invention, and is a cross-sectional view in a state before joining.
FIG. 6 is a view showing a joint according to a second embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 7 is a sectional view showing a joint according to a third embodiment of the present invention, in a state before joining.
FIG. 8 is a view showing a joint according to a third embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 9 is a sectional view showing a joint according to a fourth embodiment of the present invention, in a state before joining.
FIG. 10 is a view showing a joint according to a fourth embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 11 is a view showing a joint according to a fifth embodiment of the present invention, and is a cross-sectional view in a state before joining.
FIG. 12 is a view showing a joint according to a fifth embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 13 is a sectional view showing a joint according to a sixth embodiment of the present invention, in a state before joining.
FIG. 14 is a view showing a joint according to a sixth embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 15 is a view showing a joint according to a seventh embodiment of the present invention, and is a cross-sectional view in a state before joining.
FIG. 16 is a view showing a joint according to a seventh embodiment of the present invention, and is a cross-sectional view showing a state during joining.
FIG. 17 is a schematic overall view showing a segment to which a conventional joint is applied.
[Explanation of symbols]
1 Fitting
2 Male joint
3 Fitting member
4 unevenness (first unevenness)
8 Female thread
12 Female joint
13, 73 mated member
14, 74 unevenness (second unevenness)
15,75 pressing member
16 case (fixing member)
18 Male tightening screw
23, 33 Thin-walled steel pipe (fitted member)
43 Snap ring (Mating member)
44 Unevenness (third unevenness)
53 Notched cylinder (fitted member, convex part)
54 recess
63 Hooking member (member to be fitted)
66 The other end (projection)

Claims

A joint for joining two adjacent members together,
A male joint provided on one member and a female joint provided on the other member and interfitting with the male joint are provided, and the female joint is provided for fitting with the male joint. At this time, the diameter is increased to allow the fitting with the male joint, and after the fitting is completed, the diameter is reduced to maintain the fitting state with the male joint, and the male joint is A female screw portion having a center axis in the fitting direction is formed at a tip portion thereof, and the female screw portion is provided with a male tightening screw which is engaged with a fixing member and screwed to the female screw portion. A joint characterized by being made.

The joint according to claim 1,
The male joint has a fitting member in which a first unevenness is provided on an outer peripheral surface and a female screw portion having a center axis in the fitting direction is formed at a distal end thereof, and the female joint is A second member is provided on an inner peripheral surface of the first member, the second member being mutually engaged with the first uneven member. And a pressed member for pressing in the direction in which the fitting member is fitted, and the fitted member expands in diameter against the pressing member when fitting with the fitting member, and fits with the fitting member. A joint which is configured to be allowed to be pressed by the pressing member after fitting is completed, to reduce its diameter, and to maintain a fitted state with the fitting member.

The joint according to claim 1,
The male joint has a fitting member in which a third unevenness is provided on an outer peripheral surface and a female screw portion having a center axis in the fitting direction is formed at a distal end thereof, and the female joint is An inner peripheral surface has a fitted member that fits into the concave portion of the third unevenness and has a notch in the circumferential direction and is capable of expanding in diameter. It is configured such that the diameter is increased at the time of fitting to allow fitting with the fitting member, and after fitting is completed, the diameter is reduced by elastic return to maintain the fitted state with the fitting member. Features joints.

The joint according to claim 1,
The male joint has a fitting member in which a concave portion is provided on an outer peripheral surface and the female screw portion is provided at a distal end thereof, and the female joint has a convex portion which is fitted with the concave portion. And a fitting member capable of expanding in diameter, wherein the fitting member expands in diameter when fitting with the fitting member and allows fitting with the fitting member. A joint characterized in that the joint is configured to be reduced in diameter by elastic return after completion of the joining and to maintain a fitted state with the fitting member.

The joint according to claim 1,
The male joint has a fitting member provided with the female screw portion on an inner peripheral surface, and the female joint has a member to be fitted which is fitted to the fitting member. The fitting member expands in diameter at the time of fitting with the fitting member to allow fitting with the fitting member, and reduces the diameter by elastic return after the fitting is completed, or the fitting member after plastic deformation. Characterized in that the joint with the fitting member is maintained by friction with the fitting member.