JP4125020B2

JP4125020B2 - Segment coupling bracket

Info

Publication number: JP4125020B2
Application number: JP2002053056A
Authority: JP
Inventors: 正継米村; 二郎近藤; 克利植竹
Original assignee: Yamax Corp
Current assignee: Yamax Corp
Priority date: 2002-02-28
Filing date: 2002-02-28
Publication date: 2008-07-23
Anticipated expiration: 2022-02-28
Also published as: JP2003253996A

Description

【０００１】
【発明の属する技術分野】
本発明はセグメント結合金具に関し、特にコンクリート二次製品、例えばシールドトンネルの一次覆工に用いるコンクリート製のセグメント相互を結合するのに最適に使用するものである。
【０００２】
【従来の技術】
従来、例えばコンクリート二次製品としてシールドトンネルの一次覆工に用いるコンクリート製のセグメントを結合するのに用いる継手金具には、トンネル内に搬入可能な大きさに分割されたセグメントの対向する接合端相互に箱抜の継手金具本体を埋設し、この継手金具本体相互をボルト・ナットにて結合するものがあった。
またほかの従来例としてセグメントの対向する接合端相互に断面略Ｔ形の係合孔を有する受金具を埋設し、該受金具の係合孔内に断面略Ｈ形のコッタを係入することによりセグメント相互を結合するものがあった。
【０００３】
【発明が解決しようとする課題】
しかしながら、セグメントの対向する接合端相互に箱抜の継手金具本体を埋設し、ボルト・ナットを用いてセグメント相互を結合させる上記従来のセグメント継手金具およびセグメントの対向する接合端相互に断面略Ｔ形の係合孔を有する受金具を埋設し、該受金具の係合孔内に断面略Ｈ形のコッタを係入することによりセグメント相互を結合する上記従来の継手金具は、いずれも各継手金具におけるボルト・ナットの締結状態が不揃いで剛性が小さく、リング（セグメント相互を周方向に結合したもの）の変形が大きかった。また、いずれもトンネル内に搬入可能に幾つかに分割されたセグメントをエレクターによりシールド掘削機にて掘削した掘削穴の内周面の所定位置にセットされるものであるので、セグメント相互を結合するためには作業が狭い個所で行なわれ、ボルト・ナットを螺合して締結したり、またはコッタを係合孔内に係入しなければならない等の手間が多くかかるのと、しかも、セグメントに対して継手金具本体や受金具の設置数が多いことから、セグメント相互の結合作業に多くの時間と労力がかかり、作業効率が低かった。また、結合されるセグメント相互の内周面に継手金具本体や受金具が露呈するので、後工事としての二次覆工が省略しにくく、余計な工程数が必要になり、トンネルの施工には多くの時間と手間が必要になり、工事費も高価になっていた。
【０００４】
本発明は上記従来の不都合を解決し、弾性収束部材は、全体的に平均した伸縮力を発揮し、半径方向へ偏りなく平均して拡張し、連結シャフトの係止部がスリーブの係止孔内にワンタッチ操作にて迅速且つ確実に係止され、以て多くの時間と労力がかからずコンクリート二次製品としてセグメント相互を迅速かつ確実に結合して作業効率良く結合が行え、また結合金具部分での剛性が大きく、連結シャフトの係止部の抜け出し防止に優れ、さらには結合されるセグメントの内周面に結合金具が露呈しないで済み、後工事を省略して工事の大幅な削減がはかれるセグメント結合金具を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明は上記課題を鑑みてなされたものであり、請求項１に記載の発明は、
ａ．取付側と被取付側とのセグメント相互の対向する接合端の何れか一方に設置され、一側には挿入孔の奥にスリーブ収容孔を有するケースと、該ケースの内部に設ける前記スリーブ収容孔に、複数個の分割構成片を半径方向に拡張可能に略同心円的に配置し内部には鋸歯状の係止孔を設けたスリーブと、ゴムまたは合成樹脂よりなる弾性材により正面が略無端環状に形成され、前記スリーブの外周に伸縮可能に嵌装されることにより前記分割構成片を集束する弾性集束部材と、挿入孔を通じて前記係止孔内に係止可能に圧入される断面鋸歯状の係止部が少なくとも一端に形成される連結シャフトと、を備えたセグメント結合金具において、
ｂ．前記ケースは、スリーブ収容孔の挿入孔を臨む口端に短筒状の口環部材が外部操作により着脱可能に装着され、
ｃ．前記係止部が、前記連結シャフトの軸線に対して鋭角度に設けられた傾斜面部と、引抜方向には前記傾斜面部に連続して前記連結シャフトの軸線に向かって降ろした垂線に対して鋭角度に数度、傾倒して設けられる背面係止部とにより断面略鋸歯状であり、且つ同軸に形成され、
ｄ．前記弾性集束部材は、長手方向の一端側および他端側に全長さの略１／３程度の長さの切込みを、周方向の位相を異にして形成した。
【０００６】
また本発明の請求項２に記載の発明は、
ａ′．取付側と被取付側とのセグメント相互の対向する接合端に設置され、一側には挿入孔の奥にスリーブ収容孔を有するケースと、該ケースの内部に設ける前記スリーブ収容孔に、複数個の分割構成片を半径方向に拡張可能に略同心円的に配置し内部には鋸歯状の係止孔を設けたスリーブと、ゴムまたは合成樹脂よりなる弾性材により正面が略無端環状に形成され、前記スリーブの外周に伸縮可能に嵌装されることにより前記分割構成片を集束する弾性集束部材と、挿入孔を通じて前記係止孔内に係止可能に圧入される断面鋸歯状の係止部が両端に形成される連結シャフトと、を備えたセグメント結合金具において、
ｂ′．前記ケースは、スリーブ収容孔の挿入孔を臨む口端に短筒状の口環部材が外部操作により着脱可能に装着され、
ｃ′．前記係止部が、前記連結シャフトの軸線に対して鋭角度に設けられた傾斜面部と、引抜方向には前記傾斜面部に連続して前記連結シャフトの軸線に向かって降ろした垂線に対して鋭角度に数度、傾倒して設けられる背面係止部とにより断面鋸歯状であり、且つ同軸に形成され、
ｄ′．前記弾性集束部材は、長手方向の一端側および他端側に全長さの略１／３程度の長さの切込みを、周方向の位相を異にして形成した。
【０００７】
【発明の実施の形態】
以下本発明の実施の形態の具体例の詳細を図面を参照して説明する。
図１ないし図１１は本発明の第１実施形態を示し、Ａはコンクリートにより成形されるコンクリート二次製品としての取付側のセグメント、Ｂは被取付側のセグメントであり、これらの取付側のセグメントＡおよび被取付側のセグメントＢは例えばシールドトンネルの一次覆工に用いられる。
【０００８】
１はセグメントＡとセグメントＢとを結合するための本実施形態の結合金具であり、この結合金具１は取付側のセグメントＡと被取付側のセグメントＢとの略対向する接合端２ａ,２ｂの何れか一方、図示する実施形態ではセグメントＢの接合端２ｂに設置され、金属等の剛性材により形成されて一側には挿入孔４の奥に径大のスリーブ収容孔５を有するケース３と、該ケース３の内部に設ける前記複数個の分割構成片６を半径方向Ｒに拡張可能に略同心円的に配置し内部には鋸歯状の係止孔７を設けたスリーブ８と、ゴムまたは合成樹脂よりなる弾性材により図２では正面が略無端環状に形成され、前記スリーブ８の外周に伸縮可能に嵌装されることにより前記分割構成片６を集束する弾性集束部材９と、挿入孔４を通じて前記係止孔７内に係止可能に圧入される断面鋸歯状であり、且つ同軸の係止部１０が一端部に形成され、前記取付体としてのセグメントＡに他端１１ａが取付けられた連結シャフト１１とから成る。
【０００９】
１２はスリーブ収容孔５の口端に着脱可能に装着される短筒状の口環部材であり、この口環部材１２は現場においてスリーブ８をケース３のスリーブ収容孔５内に収容後にケース３の口端に装着される。このように、現場において口環部材１２をスリーブ８の口端に装着するようにしたのは、不用意にごみやコンクリートかすがスリーブ収容孔５内に入った場合に口環部材１２を開けてスリーブ収容孔５内のごみ等を除去し、掃除を行うためである。
【００１０】
前記弾性集束部材９は、本実施形態では弾性により伸縮性を充分に発揮し、耐水性、耐腐食性に優れたものにするために、例えばニトロブタジエンゴム（ＮＢＲ）、シリコンゴム等を使用して形成される。また、この弾性集束部材９は、図１,図３に示すように断面略円形に形成されるほか、図には示さないが断面略半円形に形成される。しかも、この弾性集束部材９は、スリーブ８の外周に設けた所望複数個、図１,図３ではスリーブ８の外周の前後に設けた２個の環状の溝１３，１３内に収容される。
【００１１】
前記係止部１０は連結シャフト１１の軸線Ｉに対して図１１に示すように鋭角度θ１をなして設けられる傾斜面部１０ａと、引抜方向には該傾斜面部１０ａに連続して前記連結シャフト１１の軸線Ｉに向かって降ろした垂線ｈに対して鋭角度に数度θ２傾倒して設けられる背面係止部１０ｂとにより形成される。前記傾斜面部１０ａは本実施形態では約４２．５度にて形成され、また背面係止部１０ｂは連結シャフト１１の軸線Ｉに向かって降ろした垂線ｈに対して約５度に形成される。このように、連結シャフト１１の前記係止部１０の傾斜面部１０ａを連結シャフト１１の軸線Ｉに対して例えば約４２．５度程度の鋭角度θ１に形成したのは、取付側のセグメントＡと被取付側のセグメントＢとの相互の結合時にスリーブ８の係止孔７内にワンタッチにて連結シャフト１１の係止部１０を圧入して係止させ易くするためである。また、傾斜面部１０ａに連続して連結シャフト１１の軸線Ｉに向かって降ろした垂線ｈに対して約５度程度の数度θ２の背面係止部１０ｂを係止部１０に形成したのは、スリーブ８内に設ける係止孔７内に連結シャフト１１の係止部１０が係止されることにより引張力Ｔが働く場合に、この引張力Ｔに対してＴ×ｔａｎθ２の合力ｆ１の分力ｆ２がスリーブ８に作用して半径方向Ｒのモーメントが働くのを防止することによりスリーブ８の複数個の分割構成片６，６，６が外周に嵌装された正面が略無端環状の弾性集束部材９,９のばね性に抗して半径方向Ｒに拡張して係止孔７から連結シャフト１１の係止部１０が不用意に抜け出すのを確実に防止し、係止を確実にするためである。
【００１２】
１４はスリーブ収容孔５の最深部に連結シャフト１１に対向して設けられた座掘部であり、この座掘部１４の深さＷは鋸歯状の係止部１０の歯部のピッチＰより小寸に形成される。この座掘部１４の深さＷは連結シャフト１１のピッチＰの約１／２程度の深さに形成される。このように、ケース３に設けるスリーブ収容孔５の最深部に連結シャフト１１の端部に設けた係止部１０の歯部のピッチＰより小寸の深さＷの座掘部１４を形成したのは、スリーブ８の係止孔７に対して連結シャフト１１の係止部１０の係止を完了した時に係止部１０が係止孔７内において不用意に移動するのを防止することにより係止孔７内に係止部１０を確実に係止させるためである。
【００１３】
このように第１実施形態は以上の構成からなり、コンクリートにより成形されるコンクリート二次製品としての例えばシールドトンネルの一次覆工に用いるコンクリート製のセグメントＢに取付側のセグメントＡを結合するには、先ずセグメントＡに端部１１ａが取付けられている連結シャフト１１をセグメントＢの端部２ｂに設けたケース３のスリーブ収容孔５に収納したスリーブ８内に圧入して行く。
【００１４】
ところで、スリーブ８が収納されるケース３は、金属等の剛性材により略筒形に形成され、該ケース３に対して略短筒状の口環部材１２が着脱可能に取付けられているので、ケース３内にごみやコンクリートかすが不用意に入り込んでいる場合には、ケース３、スリーブ８、連結シャフト１１等の結合金具の構成部品を取付側のセグメントＡまたは被取付側のセグメントＢの接合端２ａ,２ｂに対向して組付ける事前に口環状部材１２をケース３から取り外すことによりケース３からごみ等の掃除を行い、セグメントＡおよびセグメントＢ相互の結合作業の邪魔にならないようにすることができる。
【００１５】
そして、被取付側のセグメントＢに取付けられたケース３の径大のスリーブ収容孔５内に収容させた複数個、本実施形態では図に示すように３個に分割されて同心円的に配置された分割構成片６,６,６の外周の前後に設けた溝１３,１３内に、例えばニトロブタジエンゴム（ＮＢＲ）、シリコンゴムのほか合成樹脂のような伸縮性を発揮する弾性材にて形成される無端環状の弾性集束部材９を２個嵌装させることにより求心方向Ｏへの伸縮力を働かせて１つに集束されたスリーブ８内の鋸歯状の係止孔７内に取付側のセグメントＡから突出されている連結シャフト１１の端部に設けた鋸歯状の係止部１０を圧入させて行くと、このスリーブ８の３個に分割された分割構成片６,６,６が弾性集束部材９の伸縮力に抗して軸方向Ｙに交叉する半径方向Ｒへと拡張される。
【００１６】
この際、ケース３内のスリーブ収容孔５内に収容され、３個に分割された分割構成片６,６,６の外周の前後に設けた溝１３,１３内に嵌装することにより分割構成片６,６,６を１つに集束している無端環状の弾性集束部材９は、例えばニトロブタジエンゴム（ＮＢＲ）、シリコンゴムのほか合成樹脂のような伸縮性を発揮する弾性材により形成されるので、鋸歯状の係止孔７内に連結シャフト１１の端部に設けた鋸歯状の係止部１０が圧入されて行くと、弾性集束部材９は図２に示すように分割構成片６,６,６に接触することによって大きな摩擦力を受けて伸びが本来小さくなる部分Ｎ１と、分割構成片６,６,６が拡張されて分割構成片６,６,６相互間に形成される間隙Ｋに位置し、無接触になり摩擦力が０値になって伸びが大きくなる部分Ｎ２との伸びの偏在がなく全体的に平均した伸縮力が発揮される。このため、分割構成片６,６,６は弾性集束部材９の伸縮力に抗して軸方向Ｙに交叉する半径方向Ｒへと偏りなく平均して拡張されるので、連結シャフト１１の係止部１０はスリーブ８の係止孔７内にワンタッチ操作により迅速かつ確実に係止することができ、被取付側のセグメントＢに対して取付側のセグメントＡを結合する（図１参照）。
【００１７】
しかも、無端環状の弾性集束部材９は、例えばニトロブタジエンゴム（ＮＢＲ）、シリコンゴムのほか合成樹脂のような伸縮性を発揮する弾性材を使用して形成されるので、耐水性、耐腐食性に優れ、伸縮力（ばね値）は経時の使用により衰えない。
【００１８】
また、ケース３に設けるスリーブ収容孔５の最深部に連結シャフト１１の端部に設けた鋸歯状の係止部１０の歯部のピッチＰより小寸の深さＷの座掘部１４が形成されているので、スリーブ８内に設ける鋸歯状の係止孔７に対して連結シャフト１１の端部に設ける鋸歯状の係止部１０が圧入されて行くと、係止部１０の歯部のピッチＰより小寸の深さＷの座掘部１４に係止部１０の先端が衝突することにより係止孔７に対して未然にそれ以上の係止部１０の圧入が阻止されるので、係止が完了し、その後においても係止部１０が係止孔７内において不用意に移動するのが防止され、係止孔７から係止部１０が抜け出すのが確実に防止される。
【００１９】
また、上述のように取付側のセグメントＡと被取付側のセグメントＢとの結合後（図１，図１１参照）は、連結シャフト１１の端部に設けた係止部１０の傾斜面部１０ａに連続して連結シャフト１１の軸線Ｉに向かって降ろした垂線ｈに対して約５度程度の鋭角な数度θ２の背面係止部１１ｂが形成されているので、スリーブ８内に設けた鋸歯状の係止孔７に係止している鋸歯状の係止部１０を端部に形成した連結シャフト１１に図１に示すように引張力Ｔが働いた場合に、この引張力Ｔに対してＴ×ｔａｎθ２の合力ｆ１の分力ｆ２がスリーブ８に作用して半径方向Ｒのモーメントが働くのが防止される。従って、複数個に分割されたスリーブ８の分割構成片６，６，６は外周に嵌装された正面が無端環状の弾性集束部材９のばね性に抗して半径方向Ｒに不用意に拡張される虞がなくなり、強い引張力Ｔに対しても確実に係止が行え、係止孔７から連結シャフト１１の係止部１１ａが不用意に抜け出すのが防止される。従って、コンクリート二次製品としての取付側のセグメントＡと被取付側のセグメントＢとの相互の結合金具部分での剛結性は高くなる。しかも、高い止水性が必要になるセグメントＡとセグメントＢとの相互の結合を行う場合に最適である。
【００２０】
このように、被取付側のセグメントＢの接合端２ｂの内部のケース３内に半径方向Ｒに拡張可能に収容されたスリーブ８の係止孔７に連結シャフト１１の端部に設けた鋸歯状の係止部１０を係止するというワンタッチ操作により被取付側のセグメントＢに取付側のセグメントＡを簡単かつ確実に結合することができる。このため、二次コンクリート製品としての被取付側のセグメントＢと取付側のセグメントＡ相互の内周面に結合金具が露呈しないで済み、平滑性が保証される。従って、コンクリート二次製品の対向する接合端相互に箱抜の継手金具本体を埋設し、ボルト・ナットを用いてコンクリート二次製品相互を結合させるという従来の継手金具とは異なる。この結果、例えばシールドトンネルの一次覆工に用いるコンクリート製のセグメント相互を結合する場合のように、二次覆工工事を省略することができ、工事の工程数を削減して大幅に工事費を削減することができる。
【００２１】
図１２に示すものは本発明の第２実施形態である。
この実施形態では取付側と被取付側とのセグメントＡ,Ｂ相互の対向する接合端２ａ,２ｂに設置され、一側には挿入孔４を有するケース３と、該ケース３の内部に設けるスリーブ収容孔５に複数個の分割構成片６を半径方向Ｒに拡張可能に略同心円的に配置し内部には鋸歯状の係止孔７を挿入孔４の奥に設けたスリーブ８と、ゴムまたは合成樹脂よりなる弾性材により略無端環状に形成され、前記スリーブ８の外周に伸縮可能に嵌装されることにより前記分割構成片６を集束する弾性集束部材９と、挿入孔４を通じて前記係止孔７内に係止可能に圧入される鋸歯状の係止部１０,１０が両端に形成される連結シャフト１１とから成る。
Ｊは取付側のセグメントＡと被取付側のセグメントＢの対向する接合端２ａ,２ｂ内に埋設されるケース３の後端に先端側を螺入する等して固着されたアンカー筋であり、ケース３をセグメントＡ,Ｂ内に引張または圧縮に対して高強度に取り付けるためのものである。
【００２２】
そして、被取付側のセグメントＢの接合端２ｂと取付側のセグメントＡの接合端２ａとの内部のケース３,３内に半径方向Ｒに拡張可能に収容されたスリーブ８,８の係止孔７,７に連結シャフト１１の両端に設けた鋸歯状の係止部１０,１０を係止するというワンタッチ操作により被取付側のセグメントＢに取付側のセグメントＡを簡単かつ確実に結合するようにした点が異なり、そのほかは前記第１実施形態と同様の構成、作用である。
【００２３】
図１３、図１４、および図１５に示すものは本発明の第３実施形態である。
この第３実施形態では弾性集束部材９Ｂは、全体形状が円筒形に一体に形成され、スリーブ８の外周の長手方向の両端に設置するフランジ部８ａ , ８ａ間に設けた凹部２０内に嵌装されるようにしたものである。
【００２４】
すなわち、被取付体Ｂに取付けられたケース３の径大のスリーブ収容孔５内に収容させた複数個、本実施形態では図に示すように３個に分割されて同心円的に配置された分割構成片６ , ６ , ６の外周に設けた環状の凹部２０内に、例えばニトロブタジエンゴム（ＮＢＲ）、シリコンゴムのほか合成樹脂のような伸縮性を発揮する弾性材を使用して全体形状が略筒形に一体に形成される正面が無端環状の弾性集束部材９Ｂを嵌装させることにより求心方向Ｏへの伸縮力を働かせてスリーブ８を１つに集束させるようになっている。
【００２５】
そして、この実施形態では、弾性集束部材９Ｂは、長手方向の一端側および他端側に全長の略１／３程度の長さの切込み３０を周方向に位相を異にして形成したことによりスリーブ８の鋸歯状の係止孔７内に連結シャフト１１の端部に設けた係止部１０が圧入し係止されて行くと、弾性集束部材９Ｂはスリーブ８の分割構成片６ , ６ , ６に接触することによって大きな摩擦力を受けて伸びが本来小さくなる部分Ｎ１と、分割構成片６ , ６ , ６が拡張されて分割構成片６ , ６ , ６相互間に形成される間隙Ｋに位置し、無接触になり摩擦力が０値になって伸びが大きくなる部分Ｎ２との伸びの偏在が、一端側および他端側に長手方向の略１／３程度の長さの切込み３０を周方向に位相を異にして形成したことにより、全体的に平均した伸縮力を発揮して半径方向Ｒへと偏りなく平均して拡張し、連結シャフト１１の係止部１０がスリーブ８の係止孔７内にワンタッチ操作により迅速かつ確実に係止され、被取付側のセグメントＢに取付側のセグメントＡを結合するようになっている。なお、スリーブ８の外周に形成されるフランジ部８ａは必ずしも長手方向の両端に設ける必要がなく、一端に設けるものであってもよい。
【００２６】
【発明の効果】
本発明の請求項１に記載の発明は、取付側と被取付側とのセグメント相互の対向する接合端の何れか一方に設置され、一側には挿入孔の奥にスリーブ収容孔を有するケースと、該ケースの内部に設ける前記スリーブ収容孔に、複数個の分割構成片を半径方向に拡張可能に略同心円的に配置し内部には鋸歯状の係止孔を設けたスリーブと、ゴムまたは合成樹脂よりなる弾性材により正面が略無端環状に形成され、前記スリーブの外周に伸縮可能に嵌装されることにより前記分割構成片を集束する弾性集束部材と、挿入孔を通じて前記係止孔内に係止可能に圧入される断面鋸歯状の係止部が少なくとも一端に形成される連結シャフトと、を備えたセグメント結合金具において、前記ケースは、スリーブ収容孔の挿入孔を臨む口端に短筒状の口環部材が外部操作により着脱可能に装着され、前記係止部が、前記連結シャフトの軸線に対して鋭角度に設けられた傾斜面部と、引抜方向には前記傾斜面部に連続して前記連結シャフトの軸線に向かって降ろした垂線に対して鋭角度に数度、傾倒して設けられる背面係止部とにより断面略鋸歯状であり、且つ同軸に形成され、前記弾性集束部材は、長手方向の一端側および他端側に全長さの略１／３程度の長さの切込みを、周方向の位相を異にして形成している。
また、請求項２に記載の発明は、取付側と被取付側とのセグメント相互の対向する接合端に設置され、一側には挿入孔の奥にスリーブ収容孔を有するケースと、該ケースの内部に設ける前記スリーブ収容孔に、複数個の分割構成片を半径方向に拡張可能に略同心円的に配置し内部には鋸歯状の係止孔を設けたスリーブと、ゴムまたは合成樹脂よりなる弾性材により正面が略無端環状に形成され、前記スリーブの外周に伸縮可能に嵌装されることにより前記分割構成片を集束する弾性集束部材と、挿入孔を通じて前記係止孔内に係止可能に圧入される断面鋸歯状の係止部が両端に形成される連結シャフトと、を備えたセグメント結合金具において、前記ケースは、スリーブ収容孔の挿入孔を臨む口端に短筒状の口環部材が外部操作により着脱可能に装着され、前記係止部が、前記連結シャフトの軸線に対して鋭角度に設けられた傾斜面部と、引抜方向には前記傾斜面部に連続して前記連結シャフトの軸線に向かって降ろした垂線に対して鋭角度に数度、傾倒して設けられる背面係止部とにより断面鋸歯状であり、且つ同軸に形成され、前記弾性集束部材は、長手方向の一端側および他端側に全長さの略１／３程度の長さの切込みを、周方向の位相を異にして形成しているので、多くの時間と労力がかからずコンクリート二次製品としてセグメント相互を迅速かつ確実に結合して作業効率良く結合が行え、また結合金具部分での剛性が大きく、連結シャフトの係止部の抜け出し防止に優れ、さらには結合されるセグメント相互の内周面に結合金具が露呈しないで済み、後工事を省略して工事の大幅な削減がはかれる。
【００２７】
そして、請求項１の発明、および請求項２の発明では、前記係止部が、前記連結シャフトの軸線に対して鋭角度に設けられた傾斜面部と、引抜方向には前記傾斜面部に連続して前記連結シャフトの軸線に向かって降ろした垂線に対して鋭角度に数度、傾倒して設けられる背面係止部とにより形成されているので、連結シャフトの前記係止部の傾斜面部を連結シャフトの軸線に対して鋭角度に形成したことにより、取付側のセグメントと被取付側のセグメントとの相互の結合時にスリーブの係止孔内にワンタッチにて連結シャフトの係止部を圧入して係止させ易くなる。また、傾斜面部に連続して連結シャフトの軸線に向かって降ろした垂線に対して鋭角度の数度の背面係止部を係止部に形成したことにより、スリーブ内に設ける係止孔内に連結シャフトの係止部が係止されることにより引張力が働く場合に、この引張力に対してＴ×ｔａｎθ２の合力の分力がスリーブに作用して半径方向Ｒのモーメントが働くのが防止され、スリーブの複数個の分割構成片が外周に嵌装された無端状の弾性集束部材のばね性に抗して半径方向に拡張して係止孔から連結シャフトの係止部が不用意に抜け出すのを確実に防止し、係止が確実に行われる。
【００２８】
さらに、請求項１の発明、請求項２の発明では、前記ケースは、スリーブ収容孔の挿入孔を臨む口端に短筒状の口環部材が外部操作により着脱可能に装着されるので、口環部材は現場においてスリーブをケースのスリーブ収容孔内に収容後にケースの口端に装着することにより、不用意にごみやコンクリートかすがケースのスリーブ収容孔内に入った場合に、ケース、スリーブ、連結シャフト等の結合金具の構成部品を取付体または被取付体の接合端に対向して組付ける事前に口環部材を開けてスリーブ収容孔内のごみ等を除去し、掃除が行えるため、容易かつ確実に連結シャフトの係止部をスリーブの係止孔内に係止し、取付側のセグメントと被取付側のセグメントとの相互の結合作業を邪魔にならないようにして迅速かつ構造堅牢に行うことができる。
【００２９】
さらに、請求項１の発明、および請求項２に記載の発明は、弾性集束部材は、弾性集束部材は、全体形状が円筒形に形成され、スリーブの外周の長手方向の両端に設置するフランジ部間のスリーブの外周に設けた凹部内に嵌装されるので、弾性集束部材をスリーブの外周の所定位置に迅速かつ確実に取付けることができ、スリーブに求心方向Ｏへの伸縮力を偏ることなく平均して働かせて１つに集束することができる。
【００３０】
さらに、請求項１、および請求項２に記載の発明は、弾性集束部材は、長手方向の一端側および他端側に全長さの略１／３程度の長さの切込みを、周方向の位相を異にして形成したので、長手方向の一端側および他端側に長手方向の略１／３程度の長さの切込みを周方向に位相を異にして形成させ、全体的に平均した伸縮力を発揮して半径方向へと偏りなく平均して拡張し、連結シャフトの係止部がスリーブの係止孔内にワンタッチ操作により迅速かつ確実に係止され、被取付体に取付体を結合することができる。
【図面の簡単な説明】
【図１】本発明の取付物の結合金具の第１実施形態を示し、取付側と被取付側のセグメント相互の結合状態を示す拡大断面図である。
【図２】同じく本実施形態を構成するスリーブの外周に弾性集束部材を嵌装した拡大正面図である。
【図３】同じくスリーブの外周に弾性集束部材を嵌装した拡大断面図である。
【図４】同じく本実施形態を構成するケースの拡大側面図である。
【図５】同じく本実施形態を構成する口環部材状を示す拡大側面図である。
【図６】同じく拡大正面図である。
【図７】本実施形態を示すスリーブの側面図である。
【図８】同じく本実施形態を構成する連結シャフトの側面図である。
【図９】同じく連結シャフトの平面図である。
【図１０】同じく連結シャフトの係止部を示す拡大断面図である。
【図１１】同じく連結シャフトの鋸歯状の係止部を示す拡大断面図である。
【図１２】本発明のセグメント結合金具の第２実施形態を示し、取付側と被取付側とのセグメント相互の結合状態を示し、連結シャフトの両端に設けた係止部を両接合端にそれぞれ配したスリーブの係止孔内に係止させた拡大断面図である。
【図１３】本発明の取付物の結合金具の第３実施形態を示し、スリーブの外周に弾性集束部材を嵌装した状態の上半部のみを示す拡大半断面図である。
【図１４】同じく本実施形態の弾性集束部材を示す拡大側面図である。
【図１５】同じく拡大正面図である。
【符号の説明】
１結合金具
２ａ接合端
２ｂ接合端
３ケース
４挿入孔
５スリーブ収容孔
６分割構成片
７係止孔
８スリーブ
９弾性集束部材
９Ａ弾性集束部材
９Ｂ弾性集束部材
１０係止部
１１連結シャフト
Ｉ軸線
Ｒ半径方向
Ｙ軸方向[0001]
BACKGROUND OF THE INVENTION
  The present invention is a segment bondIngredientsIn particular, it is optimally used for joining concrete segments, especially concrete secondary products such as concrete segments used for primary lining of shield tunnels.
[0002]
[Prior art]
  Conventionally, for example, a joint fitting used to join a concrete segment used as a primary lining of a shield tunnel as a concrete secondary product, the opposing joint ends of the segments divided into sizes that can be loaded into the tunnel are used. In some cases, the fitting metal body with the box removed is embedded and the fitting metal parts are connected to each other with bolts and nuts.
Further, as another conventional example, a fitting having a substantially T-shaped engaging hole is embedded between the opposing joining ends of the segments, and a cotter having a substantially H-shaped cross section is inserted into the engaging hole of the receiving bracket. There are some that connect the segments together.
[0003]
[Problems to be solved by the invention]
  However, the above-mentioned conventional segment joint fitting in which a box fitting joint body is embedded between the opposing joint ends of the segments and the segments are joined together using bolts and nuts, and the joint ends facing each other have a substantially T-shaped cross section. Each of the above-described conventional fittings that ties the segments together by embedding a fitting having an engagement hole and coupling a cotter having a substantially H-shaped cross section into the engagement hole of the fitting. The bolts and nuts in the bolts and nuts were unevenly arranged and the rigidity was low, and the ring (the one in which the segments were joined in the circumferential direction) was greatly deformed. In addition, each segment is set at a predetermined position on the inner peripheral surface of an excavation hole excavated by a shield excavator with a segmented excavator, so that the segments can be carried into the tunnel. Therefore, the work is performed in a narrow place, and it takes a lot of work such as screwing and fastening bolts and nuts, or engaging the cotter into the engagement hole, On the other hand, since there are many installations of joint metal fittings and receiving metal fittings, it takes a lot of time and labor to join the segments, and the work efficiency is low. In addition, since the joint bracket body and the receiving bracket are exposed on the inner peripheral surfaces of the connected segments, secondary lining as post-construction is difficult to omit, requiring an extra number of processes. It took a lot of time and effort, and the construction cost was also expensive.
[0004]
  The present invention solves the above conventional disadvantages,The elastic converging member exerts an average expansion and contraction force overall, expands on average without unevenness in the radial direction, and the engagement portion of the connecting shaft is quickly and reliably engaged in the engagement hole of the sleeve by a one-touch operation. StoppedIt takes a lot of time and labor, and as a secondary concrete product, the segments can be quickly and reliably connected to each other for efficient work, and the connecting bracket has high rigidity to prevent the locking part of the connecting shaft from coming out. Segment coupling metal that eliminates post-installation work and significantly reduces construction work.IngredientsThe purpose is to provide.
[0005]
[Means for Solving the Problems]
  This invention is made | formed in view of the said subject, The invention of Claim 1 is
a. A case having a sleeve receiving hole at the back of the insertion hole on one side of the attachment end and the mounting side of the attachment side facing each other, and the sleeve receiving hole provided inside the case In addition, a plurality of divided component pieces are arranged substantially concentrically so as to be expandable in the radial direction, a sleeve provided with a serrated locking hole inside, and an elastic material made of rubber or synthetic resin, and the front face is substantially endless. An elastic converging member for converging the divided component pieces by being telescopically fitted to the outer periphery of the sleeve, and a sawtooth cross-section that is press-fitted into the engaging hole through an insertion hole. In a segment coupling fitting comprising a coupling shaft having a locking portion formed at least at one end,
b. In the case, a short cylindrical mouth ring member is detachably mounted by an external operation at the mouth end facing the insertion hole of the sleeve accommodation hole,
c. The locking portion has an inclined surface portion provided at an acute angle with respect to the axis line of the connecting shaft, and an acute angle with respect to a perpendicular line continuously extending from the inclined surface portion toward the axis line of the connecting shaft in the drawing direction. The cross-section is substantially serrated by a back locking portion provided tilted several times, and is formed coaxially,
d. The elastic converging member is formed with cuts having a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction with different phases in the circumferential direction.
[0006]
  The invention according to claim 2 of the present invention provides
a ′. A case having a sleeve receiving hole at the back of the insertion hole on one side and a sleeve receiving hole provided inside the case are installed at a joint end where the segments on the mounting side and the mounted side face each other. The split component piece is arranged substantially concentrically so as to be expandable in the radial direction, and a front surface is formed in a substantially endless ring by a sleeve provided with a serrated locking hole inside and an elastic material made of rubber or synthetic resin, An elastic converging member that condenses the divided component pieces by being telescopically fitted to the outer periphery of the sleeve, and a serrated locking section that is press-fitted into the engaging hole through an insertion hole. In the segment coupling metal fitting provided with connecting shafts formed at both ends,
b '. In the case, a short cylindrical mouth ring member is detachably mounted by an external operation at the mouth end facing the insertion hole of the sleeve accommodation hole,
c '. The locking portion has an inclined surface portion provided at an acute angle with respect to the axis line of the connecting shaft, and an acute angle with respect to a perpendicular line continuously extending from the inclined surface portion toward the axis line of the connecting shaft in the drawing direction. It is sawtooth in cross section and is formed coaxially with the back locking portion provided tilted several times at a time,
d '. The elastic converging member is formed with cuts having a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction with different phases in the circumferential direction.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
  Details of specific examples of embodiments of the present invention will be described below with reference to the drawings.
  FIG. 1 to FIG. 11 show a first embodiment of the present invention, wherein A is a mounting side segment as a concrete secondary product formed from concrete, B is a mounted side segment, and these mounting side segments A and the segment B on the attached side are used for primary lining of a shield tunnel, for example.
[0008]
  Reference numeral 1 denotes a joint fitting of the present embodiment for joining the segment A and the segment B. The joint fitting 1 is formed by connecting the joint ends 2a and 2b of the attachment-side segment A and the attachment-side segment B substantially opposite to each other. On the other hand, in the illustrated embodiment, the case 3 is installed at the joining end 2b of the segment B, is formed of a rigid material such as metal, and has a sleeve receiving hole 5 having a large diameter behind the insertion hole 4 on one side. The plurality of divided component pieces 6 provided inside the case 3 are arranged substantially concentrically so as to be expandable in the radial direction R, and a sleeve 8 provided with a serrated locking hole 7 inside, and rubber or synthetic In FIG. 2, the front surface of the elastic member made of resin is formed in a substantially endless ring shape, and is elastically fitted to the outer periphery of the sleeve 8 so as to be able to expand and contract. Through the locking hole 7 The connecting shaft 11 has a serrated cross-sectional shape that is press-fitted so as to be able to be locked, and has a coaxial locking portion 10 formed at one end and a segment A as the mounting body and the other end 11a.
[0009]
  Reference numeral 12 denotes a short cylindrical ring member that is detachably attached to the mouth end of the sleeve receiving hole 5, and the ring member 12 accommodates the case 8 after receiving the sleeve 8 in the sleeve receiving hole 5 of the case 3 in the field. It is attached to the mouth end. As described above, the mouth ring member 12 is attached to the mouth end of the sleeve 8 in the field because the dust ring or the concrete debris enters the sleeve receiving hole 5 and the mouth ring member 12 is opened. This is to remove dust and the like in the accommodation hole 5 and perform cleaning.
[0010]
  In the present embodiment, the elastic focusing member 9 uses, for example, nitrobutadiene rubber (NBR), silicon rubber, or the like in order to sufficiently exhibit stretchability due to elasticity and to have excellent water resistance and corrosion resistance. Formed. Further, the elastic focusing member 9 is formed in a substantially circular cross section as shown in FIGS. 1 and 3, and is formed in a substantially semicircular cross section although not shown in the drawings. Moreover, the elastic focusing member 9 is accommodated in a desired plural number provided on the outer periphery of the sleeve 8, in FIG. 1 and FIG. 3, two annular grooves 13 and 13 provided on the front and rear sides of the outer periphery of the sleeve 8.
[0011]
  The locking portion 10 has an inclined surface portion 10a provided at an acute angle θ1 as shown in FIG. 11 with respect to the axis I of the connecting shaft 11, and the connecting shaft 11 continues to the inclined surface portion 10a in the drawing direction. It is formed by a back surface locking portion 10b provided by tilting several degrees θ2 at an acute angle with respect to a perpendicular h lowered toward the axis I. In the present embodiment, the inclined surface portion 10 a is formed at about 42.5 degrees, and the back surface locking portion 10 b is formed at about 5 degrees with respect to a perpendicular h that is lowered toward the axis I of the connecting shaft 11. As described above, the inclined surface portion 10a of the locking portion 10 of the connecting shaft 11 is formed at an acute angle θ1 of about 42.5 degrees, for example, with respect to the axis I of the connecting shaft 11 because of the attachment-side segment A and This is because the engaging portion 10 of the connecting shaft 11 can be easily press-fitted into the engaging hole 7 of the sleeve 8 by one-touch operation at the time of mutual coupling with the segment B on the attachment side. In addition, the back surface locking portion 10b of several degrees θ2 of about 5 degrees is formed in the locking portion 10 with respect to the perpendicular h that is lowered toward the axis I of the connecting shaft 11 continuously to the inclined surface portion 10a. When a tensile force T is applied by locking the locking portion 10 of the connecting shaft 11 in a locking hole 7 provided in the sleeve 8, a component force of a resultant force f1 of T × tan θ2 with respect to the tensile force T. By preventing f2 from acting on the sleeve 8 and applying a moment in the radial direction R, the front surface in which the plurality of divided component pieces 6, 6 and 6 of the sleeve 8 are fitted to the outer periphery is a substantially endless annular elastic focusing. In order to reliably prevent the locking portion 10 of the connecting shaft 11 from being inadvertently pulled out from the locking hole 7 by expanding in the radial direction R against the spring properties of the members 9 and 9. It is.
[0012]
  14 is a countersink provided in the deepest part of the sleeve accommodation hole 5 so as to face the connecting shaft 11, and the depth W of the countersink 14 is determined by the pitch P of the teeth of the serrated locking part 10. Formed in small size. The depth W of the counterboring portion 14 is formed to be about ½ of the pitch P of the connecting shaft 11. In this way, a counterboring portion 14 having a depth W smaller than the pitch P of the tooth portion of the locking portion 10 provided at the end of the connecting shaft 11 is formed in the deepest portion of the sleeve accommodation hole 5 provided in the case 3. This is because the locking portion 10 is prevented from inadvertently moving in the locking hole 7 when the locking portion 10 of the connecting shaft 11 is completely locked with the locking hole 7 of the sleeve 8. This is for securely locking the locking portion 10 in the locking hole 7.
[0013]
  Thus, 1st Embodiment consists of the above structure, and joins the segment A of the attachment side to the segment B made from concrete used for the primary lining of the shield tunnel as a concrete secondary product shape | molded with concrete, for example. First, the connecting shaft 11 having the end 11a attached to the segment A is press-fitted into the sleeve 8 accommodated in the sleeve accommodating hole 5 of the case 3 provided at the end 2b of the segment B.
[0014]
  By the way, the case 3 in which the sleeve 8 is accommodated is formed in a substantially cylindrical shape by a rigid material such as a metal, and a substantially short cylindrical mouth ring member 12 is detachably attached to the case 3. If dirt or concrete debris has inadvertently entered the case 3, the connecting parts of the fitting segment such as the case 3, the sleeve 8, and the connecting shaft 11 are connected to the segment A on the attachment side or the segment B on the attachment side. Before removing the ring-shaped annular member 12 from the case 3 before assembling it facing the 2a and 2b, the dust is cleaned from the case 3 so as not to obstruct the connection work between the segment A and the segment B. it can.
[0015]
  Then, a plurality of pieces accommodated in the large-diameter sleeve accommodation holes 5 of the case 3 attached to the segment B on the attachment side, in this embodiment, divided into three as shown in the figure and arranged concentrically. In the grooves 13 and 13 provided before and after the outer periphery of the divided pieces 6, 6 and 6, for example, nitrobutadiene rubber (NBR), silicon rubber, or other elastic material that exhibits elasticity such as synthetic resin is formed. By attaching two endless annular elastic focusing members 9, a segment on the mounting side is inserted into the serrated locking hole 7 in the sleeve 8 that is converged into one by exerting a stretching force in the centripetal direction O. When the serrated locking portion 10 provided at the end of the connecting shaft 11 protruding from A is press-fitted, the divided component pieces 6, 6, 6 divided into three pieces of the sleeve 8 are elastically focused. Radial direction crossing in the axial direction Y against the expansion and contraction force of the member 9 It is extended to R.
[0016]
  At this time, it is accommodated in the sleeve accommodating hole 5 in the case 3 and is divided into three by being fitted into the grooves 13 and 13 provided before and after the outer periphery of the divided component pieces 6, 6, 6. The endless annular elastic focusing member 9 that focuses the pieces 6, 6, 6 into one is formed of an elastic material that exhibits elasticity such as nitrobutadiene rubber (NBR), silicon rubber, or synthetic resin. Therefore, when the serrated locking portion 10 provided at the end of the connecting shaft 11 is press-fitted into the serrated locking hole 7, the elastic focusing member 9 is divided into the divided component pieces 6 as shown in FIG. , 6,6 is subjected to a large frictional force so that the elongation is originally reduced, and the divided component pieces 6,6,6 are expanded to be formed between the divided component pieces 6,6,6. A portion N2 that is located in the gap K, becomes non-contact, has a frictional force of zero, and increases in elongation. Stretching force uneven distribution is totally averaged without elongation of is exhibited. For this reason, the divided component pieces 6, 6, 6 are expanded on average in the radial direction R crossing in the axial direction Y against the expansion and contraction force of the elastic focusing member 9. The portion 10 can be quickly and reliably locked in the locking hole 7 of the sleeve 8 by a one-touch operation, and connects the segment A on the mounting side to the segment B on the mounting side (see FIG. 1).
[0017]
  In addition, the endless annular elastic focusing member 9 is formed using an elastic material exhibiting stretchability such as nitrobutadiene rubber (NBR), silicon rubber, or synthetic resin, so that it has water resistance and corrosion resistance. It has excellent elasticity and spring force does not fade with time.
[0018]
  Further, a drilling portion 14 having a depth W smaller than the pitch P of the tooth portion of the serrated locking portion 10 provided at the end of the connecting shaft 11 is formed at the deepest portion of the sleeve accommodation hole 5 provided in the case 3. Therefore, when the serrated locking portion 10 provided at the end of the connecting shaft 11 is press-fitted into the serrated locking hole 7 provided in the sleeve 8, the tooth portion of the locking portion 10 is pressed. Since the tip of the locking part 10 collides with the drilling part 14 having a depth W smaller than the pitch P, the further press-fitting of the locking part 10 into the locking hole 7 is prevented in advance. Even after the locking is completed, the locking portion 10 is prevented from inadvertently moving in the locking hole 7, and the locking portion 10 is reliably prevented from coming out of the locking hole 7.
[0019]
  Further, as described above, after the attachment-side segment A and the attachment-side segment B are joined (see FIGS. 1 and 11), the inclined surface portion 10a of the locking portion 10 provided at the end of the connecting shaft 11 is provided. Since the back surface engaging portion 11b having an acute angle of several degrees θ2 of about 5 degrees with respect to the vertical line h continuously lowered toward the axis I of the connecting shaft 11 is formed, a sawtooth shape provided in the sleeve 8 is formed. When a tensile force T is applied to the connecting shaft 11 formed at the end of the serrated locking portion 10 that is locked to the locking hole 7 as shown in FIG. The component force f2 of the resultant force f1 of T × tan θ2 is prevented from acting on the sleeve 8 and acting in the radial direction R. Accordingly, the divided constituent pieces 6, 6, 6 of the sleeve 8 divided into a plurality of parts are inadvertently expanded in the radial direction R against the spring property of the endless annular elastic focusing member 9 fitted on the outer periphery. There is no possibility that the locking shaft 11 can be locked against a strong tensile force T, and the locking portion 11 a of the connecting shaft 11 is prevented from being accidentally pulled out from the locking hole 7. Accordingly, the rigidity of the joint fitting portion between the segment A on the attachment side and the segment B on the attachment side as a concrete secondary product is enhanced. Moreover, it is optimal when the segments A and B, which require high water-stopping properties, are connected to each other.
[0020]
  In this way, the sawtooth shape provided at the end of the connecting shaft 11 in the locking hole 7 of the sleeve 8 accommodated in the case 3 inside the joint end 2b of the segment B on the attachment side so as to be expandable in the radial direction R. The attachment-side segment A can be easily and reliably coupled to the attachment-side segment B by a one-touch operation of engaging the engaging portion 10 of the attachment. For this reason, it is not necessary for the fitting to be exposed on the inner peripheral surfaces of the attached-side segment B and the attached-side segment A as the secondary concrete product, and smoothness is guaranteed. Accordingly, this is different from a conventional joint fitting in which a box fitting joint body is embedded between opposing joint ends of a concrete secondary product and the concrete secondary products are coupled to each other using bolts and nuts. As a result, the secondary lining work can be omitted, for example, when the concrete segments used for the primary lining of the shield tunnel are joined together. Can be reduced.
[0021]
  FIG. 12 shows a second embodiment of the present invention.
  In this embodiment, a case 3 having an insertion hole 4 on one side and a sleeve provided inside the case 3 are installed at the joint ends 2a and 2b facing each other between the segments A and B on the mounting side and the mounting side. A plurality of divided component pieces 6 are arranged concentrically in the receiving hole 5 so as to be expandable in the radial direction R, and a serrated locking hole 7 is provided inside the insertion hole 4 and rubber or An elastic focusing member 9 which is formed in a substantially endless annular shape by an elastic material made of synthetic resin and is fitted to the outer periphery of the sleeve 8 so as to be extendable and contractable, and converges the divided component piece 6, and the locking through the insertion hole 4. Sawtooth-shaped locking portions 10 and 10 that are press-fitted into the hole 7 so as to be locked are formed by connecting shafts 11 formed at both ends.
  J is an anchor bar fixed by, for example, screwing the front end into the rear end of the case 3 embedded in the facing joint ends 2a, 2b of the segment A on the attachment side and the segment B on the attachment side, This is for attaching the case 3 in the segments A and B with high strength against tension or compression.
[0022]
  Then, the locking holes of the sleeves 8 and 8 accommodated in the cases 3 and 3 inside the joint end 2b of the attached segment B and the joint end 2a of the attached segment A so as to be expandable in the radial direction R. The attachment-side segment A is easily and reliably coupled to the attachment-side segment B by a one-touch operation of engaging the serrated engagement portions 10, 10 provided at both ends of the connecting shaft 11 with 7, 7. The other points are the same as those in the first embodiment.
[0023]
  FIG. 13, FIG. 14 and FIG. 15 show a third embodiment of the present invention.
  In the third embodiment, the elastic focusing member 9B is integrally formed in a cylindrical shape as a whole, and flange portions 8a installed at both ends in the longitudinal direction of the outer periphery of the sleeve 8. , It is made to fit in the recessed part 20 provided between 8a.
[0024]
  That is, a plurality of pieces accommodated in the large-diameter sleeve accommodating hole 5 of the case 3 attached to the attachment body B, in this embodiment, divided into three pieces as shown in the figure and arranged concentrically. Composition piece 6 , 6 , In the annular recess 20 provided on the outer periphery of the rim 6, for example, nitrobutadiene rubber (NBR), silicon rubber, and other elastic materials such as synthetic resin are used, and the overall shape is integrated into a substantially cylindrical shape. The sleeve 8 is converged into one by applying an expansion / contraction force in the centripetal direction O by fitting an elastic converging member 9B whose end face is formed with an endless ring.
[0025]
  In this embodiment, the elastic focusing member 9B is formed by forming the cuts 30 having a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction with different phases in the circumferential direction. When the latching portion 10 provided at the end of the connecting shaft 11 is press-fitted into the sawtooth-shaped latching hole 7 and is latched, the elastic focusing member 9B is divided into the divided component pieces 6 of the sleeve 8. , 6 , A portion N1 that is originally subjected to a large frictional force by coming into contact with 6 and the elongation is originally reduced; , 6 , 6 is expanded and divided component piece 6 , 6 , 6 is located in the gap K formed between them, and is unevenly distributed with the portion N2 where there is no contact and the frictional force becomes zero and the elongation becomes large. By forming the incisions 30 having a length of about / 3 with different phases in the circumferential direction, the overall stretching force is exerted on the whole to expand in the radial direction R without deviation, and the connecting shaft 11 The locking portion 10 is quickly and reliably locked in the locking hole 7 of the sleeve 8 by a one-touch operation, and the mounting-side segment A is coupled to the mounting-side segment B. The flange portions 8a formed on the outer periphery of the sleeve 8 are not necessarily provided at both ends in the longitudinal direction, and may be provided at one end.
[0026]
【The invention's effect】
  According to the first aspect of the present invention, the segments on the attachment side and the attachment side face each other. Installed at either end of the joint, on one side is a case with a sleeve accommodation hole in the back of the insertion hole, and a plurality of divided components are radially expanded in the sleeve accommodation hole provided inside the case The front is formed in a substantially endless ring with a sleeve with serrated locking holes inside and an elastic material made of rubber or synthetic resin, and can be expanded and contracted on the outer periphery of the sleeve. An elastic converging member for converging the divided component pieces by being mounted, and a connecting shaft having at least one end formed in a serrated cross-sectional shape that is press-fitted into the engaging hole through an insertion hole. The case has a short cylindrical ring member detachably attached to the end of the case facing the insertion hole of the sleeve receiving hole by an external operation, and the locking portion is connected to the connecting shaft. Paired with the axis And an inclined surface portion provided at an acute angle, and a back-side latch provided at an angle of several degrees at an acute angle with respect to a perpendicular line extending downwardly toward the axis of the connecting shaft in the drawing direction. The elastic converging member is formed with a cut in a length of about 1/3 of the entire length on one end side and the other end side in the longitudinal direction. They are formed with different phases.
  According to a second aspect of the present invention, there is provided a case having a sleeve receiving hole at the back of the insertion hole on one side, which is installed at a joint end where the segments of the attachment side and the attachment side are opposed to each other. In the sleeve receiving hole provided inside, a plurality of divided component pieces are arranged concentrically so as to be expandable in the radial direction, and a sleeve provided with a serrated locking hole inside, and an elastic made of rubber or synthetic resin The front surface is formed in a substantially endless ring shape from the material, and is fitted to the outer periphery of the sleeve so that it can be expanded and contracted. And a connecting shaft having a serrated cross-sectional engagement portion formed at both ends thereof, wherein the case has a short tubular ring member at the mouth end facing the insertion hole of the sleeve receiving hole. Is removable by external operation And an inclined surface portion provided at an acute angle with respect to the axis of the connecting shaft, and a perpendicular line extending downwardly toward the axis of the connecting shaft in the drawing direction. The elastic focusing member is formed in a sawtooth shape in cross section by a back surface locking portion provided by being inclined at an acute angle of several degrees with respect to the longitudinal direction, and the elastic focusing member has a full length on one end side and the other end side in the longitudinal direction. A cut of about 1/3 of the length is formed with different circumferential phases.BecauseIt takes a lot of time and labor, and as a secondary product of the concrete, the segments can be quickly and reliably connected to each other for efficient work, and the connecting bracket has high rigidity to prevent the locking part of the connecting shaft from coming out. In addition, it is not necessary to expose the fittings to the inner peripheral surfaces of the segments to be joined, so that the post-installation work is omitted and the construction work is greatly reduced.
[0027]
  And in invention of Claim 1 and invention of Claim 2, the said latching | locking part continues to the said inclined surface part in the extraction | drawer direction in the inclined surface part provided in acute angle with respect to the axis line of the said connection shaft. Since it is formed by a back locking part that is tilted several degrees at an acute angle with respect to a perpendicular line that is lowered toward the axis of the connecting shaft, the inclined surface part of the locking part of the connecting shaft is connected. By forming it at an acute angle with respect to the axis of the shaft, the locking part of the connecting shaft is press-fitted into the locking hole of the sleeve with one touch when the mounting-side segment and the mounted-side segment are mutually coupled. It becomes easy to lock. In addition, by forming a back surface locking portion with an acute angle of several degrees with respect to a perpendicular line that continues down from the inclined surface portion toward the axis of the connecting shaft, in the locking hole provided in the sleeve When a tensile force is applied due to the locking portion of the connecting shaft being locked, a component of the resultant force of T × tan θ2 acts on the sleeve to prevent a moment in the radial direction R from acting on the sleeve. The end of the endless elastic focusing member fitted with a plurality of divided constituent pieces of the sleeve is radially expanded against the spring property, and the locking portion of the connecting shaft is inadvertently formed from the locking hole. It is surely prevented from coming out and locked.
[0028]
  Furthermore, in the first and second aspects of the invention, the case is provided with a short cylindrical mouth ring member detachably attached to the mouth end facing the insertion hole of the sleeve receiving hole by an external operation. When the ring member is installed in the sleeve receiving hole of the case and then attached to the mouth end of the case after the sleeve is received in the field, if dirt or concrete debris enters the sleeve receiving hole of the case inadvertently In addition, before attaching the components of the coupling metal fittings such as the case, the sleeve, and the connecting shaft so as to oppose the joint end of the attachment body or the attachment body, the mouth ring member is opened in advance to remove the dust in the sleeve accommodation hole, Since it can be cleaned, the locking part of the connecting shaft is easily and reliably locked in the locking hole of the sleeve so that the connecting operation between the mounting-side segment and the mounting-side segment is not obstructed. It can be done quickly and robustly.
[0029]
  Further, according to the first and second aspects of the present invention, in the elastic focusing member, the elastic focusing member is formed in a cylindrical shape as a whole, and the flange portions are installed at both ends in the longitudinal direction of the outer periphery of the sleeve. The elastic focusing member can be quickly and surely attached to a predetermined position on the outer periphery of the sleeve without being biased in the centripetal direction O. It can work on average and converge into one.
[0030]
  Further, according to the first and second aspects of the present invention, the elastic focusing member has a cut in a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction, and a phase in the circumferential direction. The length of the longitudinal direction is one-sided and the other end-side, and approximately 1/3 of the longitudinal length of the cut is formed in different phases in the circumferential direction. By expanding the average direction without deviation in the radial direction, the locking portion of the connecting shaft is quickly and reliably locked in the locking hole of the sleeve by one-touch operation, and the mounting body is coupled to the mounting body. be able to.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view showing a first embodiment of a fitting for fittings according to the present invention and showing a coupling state between segments on an attachment side and an attachment side.
FIG. 2 is an enlarged front view in which an elastic focusing member is fitted to the outer periphery of a sleeve that also constitutes the embodiment.
FIG. 3 is an enlarged cross-sectional view in which an elastic focusing member is similarly fitted on the outer periphery of a sleeve.
FIG. 4 is an enlarged side view of a case that also constitutes the embodiment.
FIG. 5 is an enlarged side view showing the shape of a mouth ring member that also constitutes the present embodiment.
FIG. 6 is an enlarged front view of the same.
FIG. 7 is a side view of a sleeve showing the present embodiment.
FIG. 8 is a side view of a connecting shaft that also constitutes the embodiment.
FIG. 9 is a plan view of the connecting shaft.
FIG. 10 is an enlarged cross-sectional view showing a locking portion of the connecting shaft.
FIG. 11 is an enlarged cross-sectional view showing a serrated locking portion of the connecting shaft.
FIG. 12 shows a second embodiment of the segment coupling fitting of the present invention, showing the coupling state of the segments on the attachment side and the attachment side, and the locking portions provided at both ends of the connecting shaft at the joint ends, respectively. It is the expanded sectional view latched in the latching hole of the arranged sleeve.
FIG. 13 is an enlarged half sectional view showing only the upper half of a fitting fitting fitting according to a third embodiment of the present invention in a state where an elastic focusing member is fitted on the outer periphery of a sleeve.
FIG. 14 is an enlarged side view showing the elastic focusing member of the present embodiment.
FIG. 15 is an enlarged front view of the same.
[Explanation of symbols]
1 Bonding bracket
2a Joint end
2b Joint end
3 cases
4 Insertion hole
5 Sleeve receiving hole
6 pieces
7 Locking hole
8 sleeve
9 Elastic focusing member
9A Elastic focusing member
9B Elastic focusing member
10 Locking part
11 Connecting shaft
I axis
R Radial direction
Y-axis direction

Claims

a. A case having a sleeve receiving hole at the back of the insertion hole on one side of the attachment end and the mounting side of the attachment side facing each other, and the sleeve receiving hole provided inside the case In addition, a plurality of divided component pieces are arranged substantially concentrically so as to be expandable in the radial direction, a sleeve provided with a serrated locking hole inside, and an elastic material made of rubber or synthetic resin, and the front face is substantially endless. An elastic converging member for converging the divided component pieces by being telescopically fitted to the outer periphery of the sleeve, and a sawtooth cross-section that is press-fitted into the engaging hole through an insertion hole. In a segment coupling fitting comprising a connecting shaft having a locking portion formed at least at one end,
b. In the case, a short cylindrical mouth ring member is detachably mounted by an external operation at the mouth end facing the insertion hole of the sleeve accommodation hole,
c. The locking portion has an inclined surface portion provided at an acute angle with respect to the axis line of the connecting shaft, and an acute angle with respect to a perpendicular line continuously extending from the inclined surface portion toward the axis line of the connecting shaft in the drawing direction. The cross-section is substantially serrated and formed coaxially with the back locking portion provided tilted several times at a time ,
d. The elastic focusing member is formed with cuts having a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction with different phases in the circumferential direction.
e. This is a segment fitting.

a ′ . A case having a sleeve receiving hole at the back of the insertion hole on one side and a sleeve receiving hole provided inside the case are installed at a joint end where the segments on the mounting side and the mounted side face each other. The split component piece is arranged substantially concentrically so as to be expandable in the radial direction, and a front surface is formed in a substantially endless ring by a sleeve provided with a serrated locking hole inside and an elastic material made of rubber or synthetic resin, An elastic converging member that condenses the divided component pieces by being telescopically fitted to the outer periphery of the sleeve, and a serrated locking section that is press-fitted into the engaging hole through an insertion hole. In the segment coupling metal fitting provided with connecting shafts formed at both ends,
b ' . In the case, a short cylindrical mouth ring member is detachably mounted by an external operation at the mouth end facing the insertion hole of the sleeve accommodation hole,
c ' . The locking portion has an inclined surface portion provided at an acute angle with respect to the axis line of the connecting shaft, and an acute angle with respect to a perpendicular line continuously extending from the inclined surface portion toward the axis line of the connecting shaft in the drawing direction. It is sawtooth in cross section and is formed coaxially with the back locking portion provided tilted several times at a time ,
d '. The elastic focusing member is formed with cuts having a length of about 1/3 of the total length on one end side and the other end side in the longitudinal direction with different phases in the circumferential direction.
e '. This is a segment fitting.