JP4300319B2

JP4300319B2 - Junction structure

Info

Publication number: JP4300319B2
Application number: JP34260099A
Authority: JP
Inventors: 清一松下; 徹谷口; 誠請川; 康彦浅井; 智晶佐藤; 孝田中; 修小林; 正義石田; 匡剛安本; 幸司多田; 洋樹染谷; 裕輔浅野; 樹谷崎
Original assignee: Toda Corp
Current assignee: Toda Corp
Priority date: 1999-12-01
Filing date: 1999-12-01
Publication date: 2009-07-22
Anticipated expiration: 2019-12-01
Also published as: JP2001159298A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば、多数接合されて筒状のトンネルの覆工体を構成するセグメント等の構造体同士を接合する場合に用いて好適な接合構造に関するものである。
【０００２】
【従来の技術】
例えば、筒状のトンネル壁体を構築する場合、一般に、セグメント同士をボルトによって接合していた。このボルトでセグメント同士を接合する構造としては、セグメントの接合端面の近傍に、セグメントの接合面同士を当接させた際に、互いに連通する孔部を有する継手板を埋め込んでおき、これら継手板の孔部同士が連通するように、セグメントの接合端面を当接させた状態にて、孔部へボルトを挿通し、このように孔部へ挿入したボルトへナットを締結させて接合させる構造が一般的である。
【０００３】
ところで、この接合構造では、構築現場にて継手板の接合面に形成された孔部へボルトを挿通させ、このボルトへナットを締結させるという極めて煩雑な作業を要していた。
【０００４】
このため、本発明者らは、セグメント同士を極めて容易に接合させることが可能な接合構造を開発した。
この接合構造を図によって説明する。
図８に示すように、セグメント１には、それぞれその接合端面１ａに露出する接合筒２が設けられており、これら接合筒２には、両端部に軸方向へ沿うスリット３ａが周方向へ間隔をあけて複数形成された筒状の接合棒３の両端部が挿入されるようになっている。
【０００５】
そして、この接合棒３を一方のセグメント１の接合筒２へ挿入した状態にて、他方のセグメント１を近接させてその接合筒２へ接合棒３を挿入させ、それぞれのセグメント１の接合端面１ａ同士を近接させると、図９に示すように、接合棒３の両端部に、円錐台形状の駒部材４が入り込むこととなり、これにより、接合棒３の両端部が外周側へ押し広げられて、その外周面が接合筒２の内面に押し付けられて互いに係合し、それぞれのセグメント１同士が接合されるようになっている。
【０００６】
このように、上記の接合構造によれば、一方のセグメント１の接合筒２に接合棒３をセットした状態にて、他方のセグメント１の接合筒２へ接合棒３を挿入させながらセグメント１同士を近接させて接合端面１ａを突き合わせることにより、極めて容易に、これらセグメント１同士を接合させることができる。
【０００７】
【発明が解決しようとする課題】
ところで、上記接合構造において、一方のセグメント１の接合筒２の開口側が下方へ向くように傾いているような場合、この接合筒２へ挿入した接合棒３が接合筒２から抜け出して脱落してしまうことがあった。
【０００８】
また、この種の接合構造は、それぞれの接合筒２の軸線を一致させながらセグメント１同士を近接させて、一方のセグメント１の接合筒２に挿入した接合棒３を、他方のセグメント１の接合筒２内に挿入させるものであるが、一方のセグメント１の接合筒２へ接合棒３を挿入しただけでは、接合棒３が傾いてしまうため、他方のセグメント１の接合筒２に接合棒３が挿入されない恐れがあった。
このため、セグメント１同士をさらに容易に接合させることが可能な接合構造が要求されているのが現状であった。
【０００９】
また、上記接合構造において、駒部材４は、円錐台形状に形成されたものであるので、予め、この駒部材４を接合棒３の両端部へ嵌合させて保持させておくことが難しく、このため、駒部材４を、接合筒２の底部に取り付けておかなければならず、接合筒２の構造の複雑化を招いてしまうという問題があった。
【００１０】
しかも、接合棒３に駒部材４を嵌合させることができたとしても、これら接合棒３と駒部材４とは、軸線を一致させた状態には嵌合させることが困難であり、これにより、接合時に駒部材４が接合棒３の穴部へ傾いた状態で嵌合されて良好な接合状態が得られなくなる恐れもあった。
【００１１】
この発明は、上記事情に鑑みてなされたもので、セグメント等の構造体同士を、極めて容易かつ確実に接合させて接合作業にかかる労力を低減させることが可能な接合構造を提供することを目的としている。
【００１２】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の接合構造は、互いに接合される構造体の接合端面にそれぞれ設けられ、前記接合端面に開口する係合穴を有する接合筒と、前記係合穴に挿入される駒部材を両端部に形成された穴部へそれぞれ嵌合して取り付けた接合棒と、を備え、前記構造体の前記接合端面同士を当接させた際に前記駒部材によって押し広げられた前記接合棒の両端部が、前記係合穴の内周面に押し付けられ係合してなる接合構造であって、前記駒部材は円錐台形状をなし、その先端部には、軸方向へ所定長さだけ形成されて前記接合棒の穴部に嵌合するストレート部が設けられ、前記接合筒には、前記係合穴の底部に支持孔が形成され、前記支持孔は、その内周面が軸方向に沿って凹凸形状とされ、前記駒部材の内の少なくとも一方には、前記支持孔に嵌合するとともに、前記接合筒に挿入された前記接合棒を保持可能な嵌合突起が設けられ、前記嵌合突起には、前記支持孔へ嵌合させた際に、前記支持孔の内周面の凹凸に係合するＯリングが設けられ、前記接合筒、前記駒部材及び前記接合棒が同軸とされていることを特徴としている。
【００１３】
本発明に係る接合構造によれば、予め、駒部材の先端部に形成されたストレート部を、接合棒の穴部へ嵌合させることにより、極めて容易に、駒部材を接合棒の両端部に保持させることができるとともに、その軸線を一致させて取り付けることができる。これにより、構造体同士を接合する際には、接合棒の両端部に駒部材を嵌合させて取り付けた状態にて、構造体の接合筒へ挿入させれば良く、接合作業の容易化を図ることができる。また、従来のように、駒部材を接合筒の底部に予め取り付けておく必要がないので、接合筒の構造の簡略化を図ることができる。しかも、駒部材が接合棒に軸線が一致した状態に保持されて取り付けられるので、接合した際に、駒部材によって接合棒が外周方向へ均一に押し広げられ、確実にかつ良好に接合させることができる。
また、一方の構造体に設けられた接合筒の係合穴に、接合棒の一端部を挿入し、駒部材に形成された嵌合突起を、接合筒の底部に形成された支持孔へ嵌合させることにより、接合棒が接合筒の係合穴に挿入された状態に保持されるので、接合棒を極めて容易に一方の構造体の接合筒に保持させた状態にセットし、他方の構造体を近接させた際に、その接合筒の係合穴へ確実に挿入させることができる。すなわち、接合棒に取り付けられた駒部材の嵌合突起を、接合筒の支持孔へ嵌合させると、駒部材に設けられたＯリングが凹凸形状に形成された支持孔の内周面に係合することにより、駒部材の嵌合突起と接合筒の支持孔との確実な嵌合状態を得ることができ、これにより、接合筒への接合棒の保持状態を確実に維持させることができる。また、接合棒が接合筒に保持されるものであるので、接合作業時における接合棒の接合筒の係合穴からの抜け落ちをなくすことができ、これにより、構造体同士の接合作業の容易化を図り作業効率の向上を図ることができる。
【００１５】
つまり、接合棒の駒部材の嵌合突起を接合筒の支持孔に嵌合させて保持させると、接合筒の係合穴に挿入した接合棒が、傾くことなく接合筒の軸線と一致した状態に位置決めされて保持されるので、一方の構造体へ他方の構造体を、互いの接合筒の軸線を一致させた状態にて近接させることにより、極めて容易にかつ確実に、一方の構造体の接合筒に保持させた接合棒を他方の構造体の接合筒の係合穴に挿入させて、これら構造体同士を確実に接合させることができる。
【００２０】
【発明の実施の形態】
以下、本発明の接合構造の実施の形態例を図によって説明する。
図１において、符号１１は、接合棒であり、符号１２は、接合筒である。接合筒１２は、接合端面１３ａにて露出するようにセグメント（構造体）１３に埋め込まれており、これらセグメント１３の接合筒１２へ接合棒１１を嵌合させることにより、それぞれのセグメント１３同士が、これら接合筒１２と接合棒１１との係合力によって接合されるようになっている。
【００２１】
接合棒１１は、軟鋼等を筒状に形成したもので、図２及び図３に示すように、その両端部には、軸方向へ沿って複数のスリット１４が周方向へ間隔をあけて形成されている。なお、この接合棒１１は、その中間部が中実とされた中実部１５とされている。
【００２２】
また、この接合棒１１の両端部には、円錐台形状に形成された駒部材１６が装着されている。これら駒部材１６は、先端部近傍に形成されたストレート部１７の後端側の周面が、次第に拡径するテーパ部１８とされたもので、先端部のストレート部１７は、軸方向へ同一径とされ、後端方向へ所定長さだけ形成されている。
【００２３】
そして、この駒部材１６のそれぞれの先端部のストレート部１７を、接合棒１１の両端部からその穴部１１ａに嵌め込むことにより、これら駒部材１６が接合棒１１の両端部に軸線が一致した状態で保持されるようになっている。
なお、駒部材１６の先端部にも、テーパ形状に形成されたテーパ部１９が形成されている。
【００２４】
これら駒部材１６の内の一方の駒部材１６Ａには、その後端面１６ａに、後方へ向かって突出した嵌合突起２１が形成されている。この嵌合突起２１には、その後端近傍に、周方向へわたって溝部２２が形成されており、この溝部２２には、Ｏリング２３が装着されている。
【００２５】
また、接合棒１１には、その両端側における周面にノコ刃部２４が形成されている。このノコ刃部２４は、図４に示すように、周方向へわたって形成された複数の山部２５及び谷部２６からなるもので、それぞれの山部２５は、先端から中間側へ向かって傾いた形状とされている。
なお、接合棒１１の穴部１１ａの縁部は、面取りされてテーパ部１１ｂとされている。
【００２６】
接合筒１２は、前記接合棒１１の駒部材１６が取り付けられた両端部がそれぞれ挿入される係合穴３１を有するもので、その先端面がセグメント１３の接合端面１３ａに露出されている。
この接合筒１２に形成された係合穴３１の内周面は、その入り口側が、軸方向へ沿って同径に形成された保持面３２とされており、この保持面３２よりも奥側が、奥へ向かって次第に拡径するテーパ面とされた係合面３３とされている。この係合穴３１を構成する保持面３２は、接合棒１１の外径よりも僅かに大きい内径とされている。
【００２７】
この接合筒１２には、その後端側にねじ孔３５が形成されており、このねじ孔３５には、アンカー筋３６が、その端部に形成されたねじ部をねじ込むことにより固定されている。
なお、例えば、アンカー筋３６としてねじ節鉄筋を用い、このねじ節鉄筋からなるアンカー筋３６を接合筒１２のねじ孔３５にねじ込んで固定する構造としても良い。
【００２８】
また、この接合筒１２には、その中心に、図５に示すように、前記係合穴３１の底部３７に、内面がめねじ３８ａとされた支持孔３８が形成されている。なお、この支持孔３８は、後端側のねじ孔３５へ貫通しているが、貫通していなくても良い。
この接合筒１２に形成された支持孔３８には、接合棒１１の両端部に装着された駒部材１６の内の、嵌合突起２１が形成された駒部材１６Ａの嵌合突起２１が嵌合されるようになっている。
【００２９】
そして、この駒部材１６Ａの嵌合突起２１を支持孔３８へ嵌合させると、支持孔３８の内面に形成されためねじ３８ａに、嵌合突起２１に設けられたＯリング２３が食い込んで係合し、これにより、駒部材１６Ａがその後端面１６ａを係合穴３１の底部３７に当接させた状態にて接合筒１２の係合穴３１の底部３７に保持され、接合棒１１が接合筒１２に保持されるようになっている。
なお、接合筒１２の係合穴３１の入り口側の縁部は、テーパ形状に形成されたテーパ部３１ａとされている。
なお、それぞれの部材は、駒部材１６が最も硬度が高く、次いで接合棒１１の硬度が高く、軟鋼からなる接合筒１２の硬度が最も低くされている。
【００３０】
次に、上記接合構造が適応されたセグメント１３同士を接合させる場合について説明する。
まず、接合棒１１の両端部の穴部１１ａに、駒部材１６の先端側のストレート部１７を嵌合させて装着させる。このとき、穴部１１ａの入り口側の縁部にテーパ部１１ｂが形成されているとともに、駒部材１６の先端部にテーパ部１９が形成されているので、接合棒１１の穴部１１ａへの駒部材１６のストレート部１７の嵌合を極めて円滑に行うことができる。
【００３１】
ここで、駒部材１６の先端部のストレート部１７を、接合棒１１の穴部１１ａへ嵌合させることにより、駒部材１６が接合棒１１の両端部に、軸線を一致させた状態に保持される。
【００３２】
上記のようにして、両端部に駒部材１６がそれぞれ装着された接合棒１１を、互いに接合させるセグメント１３の内の一方のセグメント１３の接合筒１２の係合穴３１へ挿入する。
なお、このとき、嵌合突起２１が形成された駒部材１６Ａの装着側の端部を挿入する。
そして、この接合棒１１に装着された駒部材１６Ａの嵌合突起２１を、接合筒１２の支持孔３８へ嵌合させる。
【００３３】
このようにすると、駒部材１６Ａが接合筒１２の中心位置に保持され、これにより、図６に示すように、接合棒１１が、一方のセグメント１３の接合筒１２に挿入された状態に保持される。
また、このとき接合棒１１は、その外周面が接合筒１２の係合穴３１の保持面３２によって保持されるため、接合筒１２の軸線と一致した状態に保持されて支持される。
【００３４】
このように、一方のセグメント１３の接合筒１２に接合棒１１を支持させたら、他方のセグメント１３を、互いの接合筒１２の軸線を一致させながら近接させ、他方のセグメント１３の接合筒１２に一方のセグメント１３の接合筒１２に保持された接合棒１１を挿入させる。
【００３５】
なお、このとき、一方のセグメント１３の接合筒１２に支持された接合棒１１は、接合筒１２の軸線と一致した状態に支持されているので、この支持された接合棒１１は、他方のセグメント１３の接合筒１２へ確実に挿入される。
他方のセグメント１３を一方のセグメント１３へさらに近接させると、他方のセグメント１３の接合筒１２の係合穴３１の底部３７に駒部材１６の後端面１６ａが当接し、その後、各駒部材１６が、接合棒１１の穴部１１ａ内に入り込むことにより、接合棒１１のスリット１４が形成された両端部分が外周方向へ押し広げられる。
【００３６】
これにより、ノコ刃部２４を有する接合棒１１の外周面が、接合筒１２の係合面３３に押し付けられ、この接合棒１１の外周面のノコ刃部２４が、係合面３３に確実に食い込み、図７に示すように、接合棒１１が接合筒１２に確実に係合される。
【００３７】
このとき、ノコ刃部２４は、その山部２５が、接合棒１１の先端側から中間側へ向かって傾けられているので、接合棒１１の接合筒１２の係合穴３１への挿入時には、挿入抵抗を低減させることができ、挿入後は、接合棒１１の接合筒１２からの引き抜き抵抗を大きくすることができる。
【００３８】
そして、このように接合棒１１が各セグメント１３の接合筒１２に係合されると、この係合力によってそれぞれのセグメント１３同士が確実に接合された状態となる。
また、このようにセグメント１３同士を接合させると、これらセグメント１３の接合端面１３ａ同士の当接箇所に、接合棒１１の中実部１５が配置される。これにより、各セグメント１３の接合部分での耐せん断性が、接合棒１１の中実部１５によって確実に確保される。
【００３９】
このように、上記接合構造によれば、一方のセグメント１３に設けられた接合筒１２の係合穴３１に接合棒１１の一端部を挿入し、駒部材１６Ａに形成された嵌合突起２１を、接合筒１２の係合穴３１の底部３７に形成された支持孔３８へ嵌合させることにより、接合棒１１が接合筒１２の係合穴３１に挿入された状態に保持されるので、接合棒１１を極めて容易に一方のセグメント１３の接合筒１２に保持させた状態にセットし、他方のセグメント１３を近接させた際に、その接合筒１２へ挿入させることができる。
【００４０】
また、接合棒１１が接合筒１２に保持されるものであるので、接合作業時における接合棒１１の接合筒１２の係合穴３１からの抜け落ちをなくすことができ、これにより、セグメント１３同士の接合作業の容易化を図り作業効率の向上を図ることができる。
【００４１】
また、接合棒１１の駒部材１６Ａの嵌合突起２１を接合筒１２の支持孔３８に嵌合させて保持させると、接合筒１２の係合穴３１に挿入した接合棒１１が、傾くことなく接合筒１２の保持面３８によって接合筒１２の軸線と一致した状態に位置決めされて保持されるので、一方のセグメント１３へ他方のセグメント１３を、互いの接合筒１２の軸線を一致させた状態にて近接させることにより、極めて容易にかつ確実に、一方のセグメント１３の接合筒１２に保持させた接合棒１１を他方のセグメント１３の接合筒１２の係合穴３１に挿入させて、これらセグメント１３同士を確実に接合させることができる。
【００４２】
しかも、接合棒１１に取り付けられた駒部材１６Ａの嵌合突起２１を、接合筒１２の支持孔３８へ嵌合させると、駒部材１６Ａに設けられたＯリング２３がめね３８ａ等の凹凸形状に形成された支持孔３８の内周面に係合することにより、駒部材１６Ａの嵌合突起２１と接合筒１２の支持孔３８との確実な嵌合状態を得ることができ、これにより、接合筒１２への接合棒１１の保持状態を確実に維持させることができる。
【００４３】
また、上記接合構造によれば、駒部材１６の先端部に形成されたストレート部１７を、接合棒１１の穴部１１ａへ嵌合させることにより、極めて容易に、駒部材１６を接合棒１１の両端部に保持させることができるとともに、その軸線を一致させて取り付けることができる。
【００４４】
これにより、接合する際には、接合棒１１の両端部に駒部材１６を嵌合させて取り付けた状態にて、セグメント１３の接合筒１２の係合穴３１へ挿入させれば良く、接合作業の容易化を図ることができる。
【００４５】
また、従来のように、駒部材１６を接合筒１２の底部３７に予め取り付けておく必要がないので、接合筒１２の構造の簡略化を図ることができる。
しかも、駒部材１６が接合棒１１に軸線が一致した状態に保持されて取り付けられるので、接合した際に、駒部材１６によって接合棒１１が外周方向へ均一に押し広げられ、確実にかつ良好に接合させることができる。
【００４６】
また、それぞれの部材は、駒部材１６が最も硬度が高く、次いで接合棒１１の硬度が高く、接合筒１２の硬度が最も低くされているので、接合時に、駒部材１６によって接合棒１１の両端を確実に押し広げることができ、さらに、押し広げられる接合棒１１の外周に形成されたノコ刃部２４を接合筒１２の嵌合穴３１の係合面３３に確実に食い込ませることができる。
なお、上記の例では、接合筒１２が設けられたセグメント１３として、コンクリート製のセグメントを例にとって説明したが、このセグメント１３としては、コンクリート製に限らず、スチール製等であっても良い。
さらには、接合棒１１と接合筒１２とによって接合させる構造体として、セグメント１３を例にとって説明したが、これら接合棒１１と接合筒１２とによって接合させる構造体としては、セグメント１３に限ることはなく、あらゆる構造体同士の接合箇所に適応させることができるのは勿論である。
【００４７】
【発明の効果】
以上、説明したように、本発明の接合構造によれば、下記の効果を得ることができる。請求項１記載の接合構造によれば、予め、駒部材の先端部に形成されたストレート部を、接合棒の穴部へ嵌合させることにより、極めて容易に、駒部材を接合棒の両端部に保持させることができるとともに、その軸線を一致させて取り付けることができる。これにより、構造体同士を接合する際には、接合棒の両端部に駒部材を嵌合させて取り付けた状態にて、構造体の接合筒へ挿入させれば良く、接合作業の容易化を図ることができる。また、従来のように、駒部材を接合筒の底部に予め取り付けておく必要がないので、接合筒の構造の簡略化を図ることができる。しかも、駒部材が接合棒に軸線が一致した状態に保持されて取り付けられるので、接合した際に、駒部材によって接合棒が外周方向へ均一に押し広げられ、確実にかつ良好に接合させることができる。
また、一方の構造体に設けられた接合筒の係合穴に、接合棒の一端部を挿入し、駒部材に形成された嵌合突起を、接合筒の底部に形成された支持孔へ嵌合させることにより、接合棒が接合筒の係合穴に挿入された状態に保持されるので、接合棒を極めて容易に一方の構造体の接合筒に保持させた状態にセットし、他方の構造体を近接させた際に、その接合筒の係合穴へ挿入させることができる。すなわち、接合棒に取り付けられた駒部材の嵌合突起を、接合筒の支持孔へ嵌合させると、駒部材に設けられたＯリングが凹凸形状に形成された支持孔の内周面に係合することにより、駒部材の嵌合突起と接合筒の支持孔との確実な嵌合状態を得ることができ、これにより、接合筒への接合棒の保持状態を確実に維持させることができる。また、接合棒が接合筒に保持されるものであるので、接合作業時における接合棒の接合筒の係合穴からの抜け落ちをなくすことができ、これにより、構造体同士の接合作業の容易化を図り作業効率の向上を図ることができる。
【００４８】
すなわち、接合棒の駒部材の嵌合突起を接合筒の支持孔に嵌合させて保持させると、接合筒の係合穴に挿入した接合棒が、傾くことなく接合筒の軸線と一致した状態に位置決めされて保持されるので、一方の構造体へ他方の構造体を、互いの接合筒の軸線を一致させた状態にて近接させることにより、極めて容易にかつ確実に、一方の構造体の接合筒に保持させた接合棒を他方の構造体の接合筒の係合穴に挿入させて、これら構造体同士を確実に接合させることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の接合構造を説明するセグメント同士の接合箇所の断面図である。
【図２】本発明の実施の形態の接合構造に用いられる接合棒の構成及び構造を説明する接合棒の斜視図である。
【図３】本発明の実施の形態の接合構造に用いられる接合棒の構成及び構造を説明する接合棒の断面図である。
【図４】本発明の実施の形態の接合構造に用いられる接合棒の形状を説明する接合棒の一部の断面図である。
【図５】本発明の実施の形態の接合構造に用いられる接合棒に装着された駒部材と接合筒との嵌合状態を説明する断面図である。
【図６】本発明の実施の形態の接合構造によるセグメント同士の接合手順を説明するセグメントの接合部分における断面図である。
【図７】本発明の実施の形態の接合構造によるセグメント同士の接合状態を説明するセグメントの接合箇所における断面図である。
【図８】従来の接合構造を説明するセグメント同士の接合箇所における断面図である。
【図９】従来の接合構造を説明するセグメント同士の接合箇所における断面図である。
【符号の説明】
１１接合棒
１１ａ穴部
１２接合筒
１３セグメント（構造体）
１３ａ接合端面
１６、１６Ａ駒部材
２１嵌合突起
２３Ｏリング
３１係合穴
３２保持面
３７底部
３８支持孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joining structure suitable for use when joining structures such as segments that are joined together to form a tubular tunnel covering body, for example.
[0002]
[Prior art]
For example, when constructing a tubular tunnel wall, the segments are generally joined together by bolts. As a structure for joining the segments with this bolt, a joint plate having holes communicating with each other when the joint surfaces of the segments are brought into contact with each other in the vicinity of the joint end surfaces of the segments is embedded. The structure in which the bolts are inserted into the holes and the nuts are fastened and joined to the bolts inserted into the holes in such a manner that the joint end surfaces of the segments are in contact with each other so that the holes are communicated with each other. It is common.
[0003]
By the way, with this joining structure, a bolt is inserted into a hole formed in the joint surface of the joint plate at the construction site, and a very complicated operation of fastening a nut to the bolt is required.
[0004]
For this reason, the present inventors have developed a joint structure capable of joining the segments very easily.
This joining structure will be described with reference to the drawings.
As shown in FIG. 8, each segment 1 is provided with a joining tube 2 exposed on its joining end face 1a. In these joining tubes 2, slits 3a along the axial direction are provided at both ends in the circumferential direction. The both ends of the cylindrical joining rod 3 formed with a plurality of holes are inserted.
[0005]
And in the state which inserted this joining rod 3 in the joining cylinder 2 of one segment 1, the other segment 1 is made to adjoin and the joining rod 3 is inserted in the joining cylinder 2, and the joining end surface 1a of each segment 1 is inserted. When they are close to each other, as shown in FIG. 9, the truncated cone-shaped piece member 4 enters the both end portions of the joining rod 3, thereby pushing both end portions of the joining rod 3 to the outer peripheral side. The outer peripheral surface is pressed against the inner surface of the joining tube 2 to be engaged with each other, and the segments 1 are joined to each other.
[0006]
Thus, according to the above-described joining structure, the segments 1 are connected to each other while the joining rod 3 is inserted into the joining tube 2 of the other segment 1 with the joining rod 3 set in the joining tube 2 of one segment 1. These segments 1 can be joined very easily by bringing the joining end faces 1a into contact with each other.
[0007]
[Problems to be solved by the invention]
By the way, in the above-mentioned joining structure, when the opening side of the joining cylinder 2 of one segment 1 is inclined downward, the joining rod 3 inserted into the joining cylinder 2 comes out of the joining cylinder 2 and falls off. There was a case.
[0008]
In addition, this type of joining structure has the joining rod 3 inserted into the joining cylinder 2 of one segment 1 with the segments 1 being brought close to each other while the axes of the joining cylinders 2 are aligned with each other. Although the insertion rod 3 is inserted into the tube 2, the insertion rod 3 is inclined only by inserting the connection rod 3 into the connection tube 2 of one segment 1, so that the connection rod 3 is connected to the connection tube 2 of the other segment 1. Could not be inserted.
For this reason, the present condition is that the joining structure which can join the segments 1 more easily is requested | required.
[0009]
Moreover, in the said joining structure, since the piece member 4 is formed in a truncated cone shape, it is difficult to hold the piece member 4 in advance by fitting it to both ends of the joining rod 3, For this reason, the piece member 4 has to be attached to the bottom of the joining tube 2, which causes a problem that the structure of the joining tube 2 is complicated.
[0010]
Moreover, even if the piece member 4 can be fitted to the joining rod 3, it is difficult to fit the joining rod 3 and the piece member 4 in a state in which the axes coincide with each other. When joining, the piece member 4 is fitted into the hole of the joining rod 3 in a tilted state, and there is a possibility that a good joined state cannot be obtained.
[0011]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a joint structure capable of reducing labor required for joining work by joining structures such as segments to each other extremely easily and reliably. It is said.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the joining structure according to claim 1 is provided on a joining end face of each structure to be joined to each other, and a joining cylinder having an engaging hole opening in the joining end face, and the engaging hole And a joining rod fitted and attached to the holes formed at both ends, and pushed by the piece member when the joining end surfaces of the structure are brought into contact with each other. A joint structure in which both ends of the spread joint rod are pressed against and engaged with the inner peripheral surface of the engagement hole, the piece member has a truncated cone shape, and a shaft provided a straight portion to be fitted into the hole of the joint bar is formed by a predetermined length in the direction, the the junction tube, the support hole is formed on the bottom of the engaging hole, the support hole, the the inner peripheral surface is a concavo-convex shape along the axial direction, the less of said bridge member On the other hand, is configured to fit into the support hole, the retainable fitting projections the inserted said joining rod to the joint tube is provided, wherein the fitting protrusions, when fitted into the supporting hole Further, an O-ring that engages with the irregularities on the inner peripheral surface of the support hole is provided, and the joining cylinder, the piece member, and the joining rod are coaxial.
[0013]
According to the joining structure according to the present invention, the straight member formed in advance at the tip of the piece member is fitted into the hole of the joining rod in advance, so that the piece member can be attached to both ends of the joining rod very easily. While being able to hold | maintain, the axis line can correspond and it can attach. Thereby, when joining the structures, it is only necessary to insert them into the joining cylinder of the structure in a state where the piece members are fitted and attached to both ends of the joining rod, thereby facilitating the joining work. Can be planned. Moreover, since it is not necessary to attach a piece member to the bottom part of a joining cylinder previously, it is possible to simplify the structure of the joining cylinder. In addition, since the piece member is attached to the joining rod while being held in a state where the axes coincide with each other, the joining rod is uniformly spread in the outer circumferential direction by the piece member, so that the joining member can be reliably and satisfactorily joined. it can.
Also, one end of the joining rod is inserted into the engagement hole of the joining cylinder provided in one structure, and the fitting protrusion formed on the piece member is fitted into the support hole formed on the bottom of the joining cylinder. By joining, the joining rod is held in a state of being inserted into the engagement hole of the joining cylinder, so that the joining rod is very easily set to be held in the joining cylinder of one structure, and the other structure When the body is brought close to the body, it can be surely inserted into the engagement hole of the joining cylinder. That is, when the fitting protrusion of the piece member attached to the joining rod is fitted into the support hole of the joining cylinder, the O-ring provided on the piece member is engaged with the inner peripheral surface of the support hole formed in the uneven shape. By joining, a reliable fitting state between the fitting protrusion of the piece member and the support hole of the joining cylinder can be obtained, and thereby, the holding state of the joining rod to the joining cylinder can be reliably maintained. . In addition, since the joining rod is held by the joining cylinder, it is possible to eliminate the joining rod from coming off from the engagement hole of the joining cylinder during the joining operation, thereby facilitating the joining work between the structures. To improve work efficiency.
[0015]
That is, when the fitting protrusion of the piece member of the joining rod is fitted and held in the support hole of the joining tube, the joining rod inserted into the engagement hole of the joining tube is aligned with the axis of the joining tube without being inclined. Therefore, by bringing the other structure close to one structure in a state where the axes of the joining cylinders coincide with each other, it is extremely easy and sure to By inserting the joining rod held by the joining cylinder into the engagement hole of the joining cylinder of the other structure, these structures can be reliably joined together.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the joining structure of the present invention will be described with reference to the drawings.
In FIG. 1, the code | symbol 11 is a joining rod and the code | symbol 12 is a joining cylinder. The joining cylinder 12 is embedded in the segment (structure) 13 so as to be exposed at the joining end face 13a. By fitting the joining rod 11 to the joining cylinder 12 of these segments 13, the segments 13 are connected to each other. These are joined by the engagement force between the joining cylinder 12 and the joining rod 11.
[0021]
The joining rod 11 is formed of mild steel or the like in a cylindrical shape. As shown in FIGS. 2 and 3, a plurality of slits 14 are formed at both ends along the axial direction at intervals in the circumferential direction. Has been. The joining rod 11 is a solid part 15 whose middle part is solid.
[0022]
Moreover, the piece member 16 formed in the shape of a truncated cone is attached to both ends of the joining rod 11. These piece members 16 are configured such that the peripheral surface on the rear end side of the straight portion 17 formed in the vicinity of the front end portion is a tapered portion 18 that gradually increases in diameter, and the straight portion 17 at the front end portion is the same in the axial direction. It has a diameter and is formed by a predetermined length in the rear end direction.
[0023]
Then, by inserting the straight portions 17 at the respective distal end portions of the piece members 16 into the hole portions 11a from the both end portions of the joining rod 11, the axis lines of the piece members 16 coincide with the both end portions of the joining rod 11. Is held in a state.
In addition, the taper part 19 formed in the taper shape also in the front-end | tip part of the piece member 16 is formed.
[0024]
One piece member 16A of these piece members 16 is formed with a fitting protrusion 21 protruding rearward on the rear end face 16a. A groove 22 is formed in the fitting protrusion 21 in the vicinity of the rear end thereof in the circumferential direction, and an O-ring 23 is attached to the groove 22.
[0025]
In addition, a saw blade 24 is formed on the peripheral surface of both ends of the joining rod 11. As shown in FIG. 4, the saw blade 24 is composed of a plurality of crests 25 and troughs 26 formed in the circumferential direction, and each crest 25 extends from the tip toward the intermediate side. It has an inclined shape.
In addition, the edge part of the hole part 11a of the joining rod 11 is chamfered, and it is set as the taper part 11b.
[0026]
The joining cylinder 12 has engagement holes 31 into which both end portions to which the piece members 16 of the joining rod 11 are attached are respectively inserted, and the front end face thereof is exposed to the joining end face 13 a of the segment 13.
The inner peripheral surface of the engagement hole 31 formed in the joining cylinder 12 has an entrance side as a holding surface 32 formed to have the same diameter along the axial direction, and the back side of the holding surface 32 is The engagement surface 33 is a tapered surface that gradually increases in diameter toward the back. The holding surface 32 constituting the engaging hole 31 has an inner diameter slightly larger than the outer diameter of the joining rod 11.
[0027]
A screw hole 35 is formed at the rear end side of the joining cylinder 12, and an anchor bar 36 is fixed to the screw hole 35 by screwing a screw part formed at the end thereof.
Note that, for example, a threaded reinforcing bar may be used as the anchor bar 36, and the anchor bar 36 formed of the screwed bar may be screwed into the screw hole 35 of the joining cylinder 12 and fixed.
[0028]
Further, as shown in FIG. 5, a support hole 38 having an inner surface made of a female screw 38 a is formed in the bottom portion 37 of the engagement hole 31. The support hole 38 penetrates the screw hole 35 on the rear end side, but it does not have to penetrate.
The fitting projections 21 of the piece member 16A in which the fitting projections 21 of the piece members 16 mounted on both ends of the joining rod 11 are formed are fitted into the support holes 38 formed in the joining cylinder 12. It has come to be.
[0029]
When the fitting projection 21 of the piece member 16A is fitted into the support hole 38, the O-ring 23 provided on the fitting projection 21 bites into and engages with the screw 38a formed on the inner surface of the support hole 38. Thus, the piece member 16A is held on the bottom portion 37 of the engagement hole 31 of the joining tube 12 in a state where the rear end surface 16a is in contact with the bottom portion 37 of the engagement hole 31, and the joining rod 11 is connected to the joining tube 12. Is supposed to be retained.
In addition, the edge part by the side of the entrance of the engagement hole 31 of the joining cylinder 12 is made into the taper part 31a formed in the taper shape.
In each member, the piece member 16 has the highest hardness, the joining rod 11 has the highest hardness, and the joining cylinder 12 made of mild steel has the lowest hardness.
[0030]
Next, the case where the segments 13 to which the joining structure is applied is joined together will be described.
First, the straight portion 17 on the front end side of the piece member 16 is fitted and attached to the hole portions 11 a at both ends of the joining rod 11. At this time, since the tapered portion 11b is formed at the edge portion on the entrance side of the hole portion 11a and the tapered portion 19 is formed at the distal end portion of the piece member 16, the piece to the hole portion 11a of the joining rod 11 is formed. The straight part 17 of the member 16 can be fitted very smoothly.
[0031]
Here, by fitting the straight portion 17 at the tip of the piece member 16 into the hole 11 a of the joining rod 11, the piece member 16 is held in a state in which the axis line coincides with both ends of the joining rod 11. The
[0032]
As described above, the joining rods 11 each having the piece members 16 attached to both ends are inserted into the engagement holes 31 of the joining cylinder 12 of one of the segments 13 to be joined to each other.
At this time, the end portion on the mounting side of the piece member 16A on which the fitting protrusion 21 is formed is inserted.
Then, the fitting protrusion 21 of the piece member 16 </ b> A attached to the joining rod 11 is fitted into the support hole 38 of the joining cylinder 12.
[0033]
If it does in this way, 16A of piece members will be hold | maintained in the center position of the joining cylinder 12, and, thereby, the joining rod 11 will be hold | maintained in the state inserted in the joining cylinder 12 of one segment 13, as shown in FIG. The
At this time, since the outer peripheral surface of the joining rod 11 is held by the holding surface 32 of the engagement hole 31 of the joining tube 12, the joining rod 11 is held and supported in a state of being aligned with the axis of the joining tube 12.
[0034]
As described above, when the joining rod 11 is supported by the joining cylinder 12 of one segment 13, the other segment 13 is brought close to each other while matching the axes of the joining cylinders 12 to the joining cylinder 12 of the other segment 13. The joining rod 11 held by the joining cylinder 12 of one segment 13 is inserted.
[0035]
At this time, since the joining rod 11 supported by the joining cylinder 12 of one segment 13 is supported in a state that coincides with the axis of the joining cylinder 12, the supported joining rod 11 is supported by the other segment. It is surely inserted into the 13 joining cylinders 12.
When the other segment 13 is further brought closer to the one segment 13, the rear end surface 16 a of the piece member 16 comes into contact with the bottom 37 of the engagement hole 31 of the joining tube 12 of the other segment 13. By entering the hole 11a of the joining rod 11, both end portions where the slits 14 of the joining rod 11 are formed are pushed and expanded in the outer peripheral direction.
[0036]
Thereby, the outer peripheral surface of the joining rod 11 having the saw blade portion 24 is pressed against the engaging surface 33 of the joining tube 12, and the saw blade portion 24 on the outer peripheral surface of the joining rod 11 is reliably brought into contact with the engaging surface 33. As shown in FIG. 7, the joining rod 11 is securely engaged with the joining cylinder 12.
[0037]
At this time, since the peak portion 25 of the saw blade portion 24 is inclined from the distal end side to the intermediate side of the joining rod 11, when the joining rod 11 is inserted into the engagement hole 31 of the joining tube 12, The insertion resistance can be reduced, and after insertion, the pulling resistance of the joining rod 11 from the joining tube 12 can be increased.
[0038]
When the joining rod 11 is engaged with the joining cylinder 12 of each segment 13 in this way, the respective segments 13 are reliably joined by this engagement force.
Further, when the segments 13 are joined together in this manner, the solid portion 15 of the joining rod 11 is disposed at the contact position between the joining end faces 13 a of the segments 13. Thereby, the shear resistance at the joint portion of each segment 13 is reliably ensured by the solid portion 15 of the joint rod 11.
[0039]
Thus, according to the joining structure, one end of the joining rod 11 is inserted into the engaging hole 31 of the joining tube 12 provided in one segment 13, and the fitting protrusion 21 formed on the piece member 16A is inserted. Since the joining rod 11 is held in the state of being inserted into the engagement hole 31 of the joining cylinder 12 by fitting into the support hole 38 formed in the bottom portion 37 of the engagement hole 31 of the joining cylinder 12, the joining The rod 11 can be very easily set in a state of being held by the joining cylinder 12 of one segment 13 and inserted into the joining cylinder 12 when the other segment 13 is brought close to the other.
[0040]
In addition, since the joining rod 11 is held by the joining tube 12, it is possible to eliminate the drop of the joining rod 11 from the engagement hole 31 of the joining tube 12 during the joining operation. It is possible to facilitate the joining work and improve the working efficiency.
[0041]
Further, when the fitting protrusion 21 of the piece member 16A of the joining rod 11 is fitted and held in the support hole 38 of the joining cylinder 12, the joining rod 11 inserted into the engagement hole 31 of the joining cylinder 12 is not inclined. Since the holding surface 38 of the joining cylinder 12 is positioned and held in a state where it coincides with the axis of the joining cylinder 12, the other segment 13 is made to coincide with the axis of the joining cylinder 12. The joining rod 11 held in the joining tube 12 of one segment 13 is inserted into the engagement hole 31 of the joining tube 12 of the other segment 13 very easily and surely. The two can be reliably bonded to each other.
[0042]
In addition, when the fitting protrusion 21 of the piece member 16A attached to the joining rod 11 is fitted into the support hole 38 of the joining cylinder 12, the O-ring 23 provided on the piece member 16A has an irregular shape such as a screw 38a. By engaging the inner peripheral surface of the formed support hole 38, a reliable fitting state between the fitting protrusion 21 of the piece member 16 </ b> A and the support hole 38 of the joining cylinder 12 can be obtained. The holding state of the joining rod 11 to the cylinder 12 can be reliably maintained.
[0043]
Moreover, according to the said joining structure, by making the straight part 17 formed in the front-end | tip part of the piece member 16 fit into the hole 11a of the joining rod 11, the piece member 16 of the joining rod 11 can be very easily performed. While being able to hold | maintain at both ends, the axis line can be made to correspond.
[0044]
Thereby, when joining, the piece member 16 may be inserted into the engagement hole 31 of the joining cylinder 12 of the segment 13 in a state where the piece members 16 are fitted and attached to both ends of the joining rod 11. Can be facilitated.
[0045]
Moreover, since it is not necessary to attach the piece member 16 to the bottom portion 37 of the joining cylinder 12 in advance as in the prior art, the structure of the joining cylinder 12 can be simplified.
Moreover, since the piece member 16 is attached to the joining rod 11 while being held in a state where the axes thereof coincide with each other, the joining rod 11 is uniformly spread in the outer circumferential direction by the piece member 16 when joined, and reliably and satisfactorily. Can be joined.
[0046]
Further, each member has the piece member 16 having the highest hardness, the joining rod 11 having the highest hardness, and the joining cylinder 12 having the lowest hardness. Can be surely spread, and the saw blade portion 24 formed on the outer periphery of the joining rod 11 to be spread can be surely bitten into the engaging surface 33 of the fitting hole 31 of the joining cylinder 12.
In the above example, the segment 13 provided with the joining cylinder 12 has been described by taking a concrete segment as an example. However, the segment 13 is not limited to concrete but may be made of steel or the like.
Furthermore, although the segment 13 has been described as an example of the structure to be joined by the joining rod 11 and the joining cylinder 12, the structure to be joined by the joining rod 11 and the joining cylinder 12 is not limited to the segment 13. Needless to say, it can be applied to any joint portion between structures.
[0047]
【The invention's effect】
As described above, according to the joint structure of the present invention, the following effects can be obtained. According to the joining structure according to claim 1, the straight member formed in advance at the tip of the piece member is fitted into the hole of the joining rod in advance, so that the piece member can be extremely easily attached to both ends of the joining rod. And can be attached with their axes aligned. Thereby, when joining the structures, it is only necessary to insert them into the joining cylinder of the structure in a state where the piece members are fitted and attached to both ends of the joining rod, thereby facilitating the joining work. Can be planned. Moreover, since it is not necessary to attach a piece member to the bottom part of a joining cylinder previously, it is possible to simplify the structure of the joining cylinder. In addition, since the piece member is attached to the joining rod while being held in a state where the axes coincide with each other, the joining rod is uniformly spread in the outer circumferential direction by the piece member, so that the joining member can be reliably and satisfactorily joined. it can.
Also, one end of the joining rod is inserted into the engagement hole of the joining cylinder provided in one structure, and the fitting protrusion formed on the piece member is fitted into the support hole formed on the bottom of the joining cylinder. By joining, the joining rod is held in a state of being inserted into the engagement hole of the joining cylinder, so that the joining rod is very easily set to be held in the joining cylinder of one structure, and the other structure When the body is brought close to the body, it can be inserted into the engagement hole of the joining cylinder. That is, when the fitting protrusion of the piece member attached to the joining rod is fitted into the support hole of the joining cylinder, the O-ring provided on the piece member is engaged with the inner peripheral surface of the support hole formed in the uneven shape. By joining, a reliable fitting state between the fitting protrusion of the piece member and the support hole of the joining cylinder can be obtained, and thereby, the holding state of the joining rod to the joining cylinder can be reliably maintained. . In addition, since the joining rod is held by the joining cylinder, it is possible to eliminate the joining rod from coming off from the engagement hole of the joining cylinder during the joining operation, thereby facilitating the joining work between the structures. To improve work efficiency.
[0048]
That is, when the fitting protrusion of the piece member of the joining rod is fitted and held in the support hole of the joining tube, the joining rod inserted into the engagement hole of the joining tube is aligned with the axis of the joining tube without being inclined. Therefore, by bringing the other structure close to one structure in a state where the axes of the joining cylinders coincide with each other, it is extremely easy and sure to By inserting the joining rod held by the joining cylinder into the engagement hole of the joining cylinder of the other structure, these structures can be reliably joined together.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a joining portion between segments for explaining a joining structure according to an embodiment of the present invention.
FIG. 2 is a perspective view of a joining rod for explaining the configuration and structure of the joining rod used in the joining structure according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view of a joining rod for explaining the configuration and structure of a joining rod used in the joining structure according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view of a part of the joining rod for explaining the shape of the joining rod used in the joining structure according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating a fitting state between a piece member attached to a joining rod used in the joining structure of the embodiment of the present invention and a joining tube.
FIG. 6 is a cross-sectional view of the segment joining portion for explaining the joining procedure of the segments by the joining structure according to the embodiment of the present invention.
FIG. 7 is a cross-sectional view at a joining portion of segments for explaining a joining state of segments by the joining structure according to the embodiment of the present invention.
FIG. 8 is a cross-sectional view of a joining portion between segments for explaining a conventional joining structure.
FIG. 9 is a cross-sectional view of a joining portion between segments for explaining a conventional joining structure.
[Explanation of symbols]
11 Joining rod 11a Hole 12 Joining cylinder 13 Segment (structure)
13a Joint end face 16, 16A Piece member 21 Fitting protrusion 23 O-ring 31 Engagement hole 32 Holding surface 37 Bottom 38 Support hole

Claims

互いに接合される構造体の接合端面にそれぞれ設けられ、前記接合端面に開口する係合穴を有する接合筒と、
前記係合穴に挿入される駒部材を両端部に形成された穴部へそれぞれ嵌合して取り付けた接合棒と、を備え、
前記構造体の前記接合端面同士を当接させた際に前記駒部材によって押し広げられた前記接合棒の両端部が、前記係合穴の内周面に押し付けられ係合してなる接合構造であって、
前記駒部材は円錐台形状をなし、その先端部には、軸方向へ所定長さだけ形成されて前記接合棒の穴部に嵌合するストレート部が設けられ、
前記接合筒には、前記係合穴の底部に支持孔が形成され、
前記支持孔は、その内周面が軸方向に沿って凹凸形状とされ、
前記駒部材の内の少なくとも一方には、前記支持孔に嵌合するとともに、前記接合筒に挿入された前記接合棒を保持可能な嵌合突起が設けられ、
前記嵌合突起には、前記支持孔へ嵌合させた際に、前記支持孔の内周面の凹凸に係合するＯリングが設けられ、
前記接合筒、前記駒部材及び前記接合棒が同軸とされていることを特徴とする接合構造。A joining cylinder provided on each joining end face of the structures to be joined to each other and having an engagement hole opening in the joining end face;
A joining rod fitted and attached to the holes formed at both ends of the piece members inserted into the engagement holes,
A joining structure in which both end portions of the joining rod pushed and spread by the piece member when the joining end surfaces of the structure are brought into contact with each other are pressed against and engaged with the inner peripheral surface of the engagement hole. There,
The piece member has a frustoconical shape, and a straight portion that is formed in a predetermined length in the axial direction and fits into the hole portion of the joining rod is provided at the tip portion thereof,
A support hole is formed in the bottom of the engagement hole in the joining cylinder,
The support hole has an inner peripheral surface that is uneven along the axial direction,
At least one of the piece members is provided with a fitting projection that fits into the support hole and can hold the joining rod inserted into the joining tube,
The fitting protrusion is provided with an O-ring that engages with the irregularities on the inner peripheral surface of the support hole when fitted into the support hole,
The joining structure, wherein the joining cylinder, the piece member, and the joining rod are coaxial.