JP4169837B2

JP4169837B2 - Formwork

Info

Publication number: JP4169837B2
Application number: JP23780998A
Authority: JP
Inventors: 博英橋本; 正憲若林
Original assignee: 石川島建材工業株式会社
Priority date: 1998-08-24
Filing date: 1998-08-24
Publication date: 2008-10-22
Anticipated expiration: 2018-08-24
Also published as: JP2000061921A

Description

【０００１】
【発明の属する技術分野】
この発明は、互いに接合されることにより、トンネル壁体や路面等を構築するプレキャスト製のコンクリート構造物を製造する型枠に関するものである。
【０００２】
【従来の技術】
トンネルを構築し得る方法としては、掘削穴の内面側にセグメント（主にコンクリート製あるいはスチール製）を組み立てて筒状壁体を構築する、いわゆるシールド工法が一般的である。
このシールド工法に用いられるセグメントとしては平面視長方形状で円弧版状のものが主流であり、これら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へボルトを挿通させ、この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。また、相互のセグメントにナット部材であるインサート金具を埋め込んでおき、隣接するセグメントに貫通させたボルトを締結させて互いに接合させる構造もある。
【０００３】
しかしながら、上記構造では、構築現場にて継手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たり、相互のセグメントに埋め込んだインサート金具へボルトを締結させるという極めて煩雑な作業を要するため組立時間の短縮には限界があり、また、ロボットによる自動組み付けへの適応が困難であった。
さらには、二次覆工を省略する場合にもボルト・ナットを取り付けるためにセグメントに形成したボルトボックスの閉塞作業を行わなければならず、施工の高速化、省力化を目指す上で新たな継手構造の開発が急務となっているのが現状であった。
【０００４】
ここで、本発明者らは、極めて容易に接合することができ、しかも、内面側が平滑なセグメントを開発した。
図８及び図９に示すように、このセグメント１には、その接合端面１ａに、接合溝部２が形成されており、この接合溝部２には、複数の断面視Ｃ型の接合金具３が設けられ、これら接合金具３同士が、それぞれＩ型の連結金具４によって互いに連結されるようになっている。
接合金具３は、対向位置に係止片部５を有する鉤形の係止部６が設けられたもので、係止片部５同士によって形成された空間が連結金具４の係合部７が係合する係合空間８とされている。
【０００５】
また、係止片部５の内面からなる係止面９は、連結金具４の挿入方向へ向かって狭まるテーパ面とされている。つまり、セグメント１の接合端面１ａ同士を突き合わせた状態にて、互いに対向する接合金具３の係止面９が、連結金具４の挿入方向後方へ向かって次第に近接するテーパ面とされている。
【０００６】
そして、上記セグメント１同士を接合させる場合は、まず、これらセグメント１の接合端面１ａ同士を互いに当接させ、接合溝２同士からなる挿入穴内へ連結金具４を挿入する。
このようにすると、連結金具４の係合部７のテーパ面からなる係合面１０が接合金具３の係止片部５のテーパ面からなる係止面９に当接してスライドすることにより、それぞれの接合金具３同士が互いに引き寄せられ、これにより、互いのセグメント１同士が接合される。
なお、奥側の接合金具３同士を接合させる連結金具４は、その係合部７が、手前側の接合金具３の係合空間８内を通過するように形成されている。
また、図中符号１１は、セグメント１を形成するコンクリートとの一体化を図るために設けられたアンカーである。
【０００７】
【発明が解決しようとする課題】
ところで、上記接合構造を有するセグメント１や他のプレキャストコンクリート構造物等を製造する場合、接合金具３を型枠に保持させる必要があるが、従来、この接合金具３を精度良くかつ容易に支持させることができる型枠がなく、このため、この接合構造を有するセグメント１等のコンクリート構造物を容易に製造することができなかった。
【０００８】
この発明は、上記事情に鑑みてなされたもので、接合端面に継手が設けられた内面平滑なコンクリート構造物を容易に製造することが可能な型枠を提供することを目的としている。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の型枠は、端部が屈曲した係止片部を対向位置に有する断面視Ｃ型の接合金具が接合端面に設けられ、該接合端面同士を突き合わせた状態にて、前記接合金具同士の間に、両側部に前記接合金具の前記係止片部間の係合空間に挿入されて係合する係合部が形成された連結金具を挿入することにより、該連結金具によって前記接合金具同士が接合されて互いに連結されるコンクリート構造物を製造する型枠であって、底板と、該底板の周囲に設けられて前記コンクリート構造物の接合端面を形成する型枠板と、互いに対向する前記型枠板に設けられ前記接合金具を保持させる接合金具保持機構とを有し、これら底板及び型枠板によって囲われた空間が、コンクリート打設空間とされてなり、前記接合金具保持機構は、前記接合金具に係合可能な係合保持部が形成された係合金具と、該係合金具を摺動させて、前記接合金具の係合空間へ前記係合保持部を挿抜させる摺動機構とを有し、前記型枠板の所定位置に形成された開口部から挿入された前記接合金具の係合空間へ、前記摺動機構によって前記係合金具を移動させることにより前記係合金具の係合保持部を挿入して係合させて、前記接合金具を保持させることを特徴としている。
【００１０】
これにより、接合金具を端板の開口部へ挿入して配置させた状態にて、接合金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持部を接合金具の係合空間内へ挿入させて係合させることにより、この接合金具が型枠板へ保持される。
また、コンクリート打設空間へ打設したコンクリートの硬化後においては、接合金具保持機構の摺動機構によって係合金具を逆方向へ摺動させることにより、係合金具の係合保持部が接合金具の係合空間から抜き出されて、係合金具による接合金具の係合が解除される。
【００１１】
請求項２記載の型枠は、端部が屈曲した係止片部を対向位置に有する断面視Ｃ型の接合金具が一方の接合端面に設けられ、該接合金具の前記係止片部間の係合空間に挿入されて係合する係合部を有する雄金具が他方の接合端面に設けられ、一方の接合端面の接合金具の係合空間へ他方の接合端面の雄金具の係合部を挿入することにより、これら接合金具と雄金具とが接合されて互いに連結されるコンクリート構造物を製造する型枠であって、底板と、該底板の周囲に設けられて前記コンクリート構造物の接合端面を形成する型枠板と、互いに対向する前記型枠板の一方の型枠板に設けられ前記接合金具を保持させる接合金具保持機構と、他方の型枠板に設けられ前記雄金具を保持させる雄金具保持機構とを有し、これら底板及び型枠板によって囲われた空間が、コンクリート打設空間とされてなり、前記接合金具保持機構は、前記接合金具に係合可能な係合保持部が形成された係合金具と、該係合金具を摺動させて、前記接合金具の係合空間へ前記係合保持部を挿抜させる摺動機構とを有し、前記雄金具保持機構は、前記雄金具の係合部が係合される係合保持空間が形成された係合金具と、該係合金具を摺動させて、前記雄金具の係合部を前記係合金具の係合保持空間へ挿抜させる摺動機構とを有し、一方の型枠板では、所定位置に形成された開口部から挿入された前記接合金具の係合空間へ、前記摺動機構によって前記係合金具を移動させることにより前記係合金具の係合保持部を挿入して係合させて、前記接合金具を保持させ、他方の型枠板では、所定位置に形成された開口部から挿入された前記雄金具の係合部を、前記摺動機構によって前記係合金具を移動させることにより前記係合金具の係合保持空間に挿入させて係合させて、前記雄金具を保持させることを特徴としている。
【００１２】
これにより、互いに対向する型枠板の一方の型枠板に接合金具を保持させる場合は、接合金具を型枠板の開口部へ挿入して配置させた状態にて、接合金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持部を接合金具の係合空間内へ挿入させて係合させることにより、この接合金具が一方の型枠板へ保持される。
また、他方の型枠板に雄金具を保持させる場合は、雄金具を型枠板の開口部へ挿入して配置させた状態にて、雄金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持空間に雄金具の係合部を挿入させて係合させることにより、この雄金具が他方の型枠板へ保持される。
また、コンクリート打設空間へ打設したコンクリートの硬化後においては、接合金具保持機構及び雄金具保持機構の摺動機構によって係合金具を逆方向へ摺動させることにより、それぞれの係合金具による接合金具及び雄金具の係合が解除される。
【００１３】
請求項３記載の型枠は、請求項１または請求項２記載の型枠において、前記摺動機構が、前記係合金具を摺動可能に保持するガイド金具と、前記係合金具に形成されたねじ孔にねじ込まれ、回動されることにより前記係合金具へのねじ込み量に応じて前記係合金具を摺動させるボールスクリューとを有することを特徴としている。
つまり、ボールスクリューを回動させることにより、ガイド金具によって摺動可能に支持された係合金具が摺動されて、接合金具あるいは雄金具の型枠板への保持及び保持の解除が行われる。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態の型枠を図によって説明する。なお、従来技術と同一構造部分には、同一符号を付して説明を省略する。
また、この実施の形態では、コンクリート構造物としてトンネル壁体を構成する前述したセグメント１を例にとって、このセグメント１を製造する型枠を説明する。
図１において、符号２１は、型枠である。この型枠２１は、セグメント（コンクリート構造物）１の内周面を形成する底板２２と、この底板２２の両側部に設けられた円弧状の側板（型枠板）２３と、これら側板２３の両端をつなぐ端板（型枠板）２４とから概略構成されており、端板２４に、接合金具３が保持されている。
【００１５】
そして、これら底板２２、側板２３及び端板２４から形成される空間部分がコンクリート打設空間Ｓとされ、このコンクリート打設空間Ｓが、成形すべき円弧版状に即したものとされている。
なお、側板２３及び端板２４はそれぞれ底板２２に対してコンクリート打設空間Ｓ側の面が垂直にされており、また、側板２３及び端板２４は、それぞれ互いに離間する方向へ移動可能とされている。
【００１６】
この型枠２１のコンクリート打設空間Ｓ内にコンクリートを打設することにより、底板２２によって内周面が形成され、側板２３、端板２４によって各接合端面が形成されたセグメント１が製造されるようになっている。
【００１７】
次に、端板２４への接合金具３の保持構造について説明する。
端板２４には、接合金具３をそれぞれ保持する接合金具保持機構３１が設けられている。
図２及び図３に示すように、接合金具保持機構３１は、端板２４の外側における底部のベース板３２に固定されたガイド金具３３と、このガイド金具３３に保持された係合金具３４と、この係合金具３４に形成されたねじ孔３５にねじ込まれたボールスクリュー３６とを有しており、ガイド金具３３とボールスクリュー３６とから、係合金具３４を摺動させる摺動機構が構成されている。
【００１８】
ガイド金具３３には、その上部に保持部３７を有しており、この保持部３７には、長手方向へ摺動孔３７ａが形成されている。また、この保持部３７には、一側部に、長手方向へわたってスリット３７ｂが形成されている。
そして、この保持部３７に形成された摺動孔３７ａに、係合金具３４に形成された前記ねじ孔３５を有する円筒部３４ａが摺動可能に保持され、スリット３７ｂから突出されている。
【００１９】
係合金具３４は、スリット３７ｂからの突出側に、係合保持部４１が形成されている。この係合保持部４１は、接合金具３の係合空間８内に挿入されるもので、連結金具４の係合部７と略同一形状に形成されている。つまり、この係合保持部４１には、接合金具３の係止片部５の内面からなる係止面９に係合する係合面４２を有している。
【００２０】
また、端板２４には、セグメント１の接合端面１ａに溝部２を形成する凸部４３が形成されている。この凸部４３には、切欠部（開口部）４４が形成されており、この切欠部４４に接合金具３が、コンクリート打設空間Ｓ側から挿入されて配置されるようになっている。
【００２１】
そして、上記接合金具保持機構３１は、ボールスクリュー３６を回動させることにより、このボールスクリュー３６のねじ込み量に応じて係合金具３４が摺動し、凸部４３の切欠部４４に配置される接合金具３の配置位置と、この配置位置から外れた位置との間を移動するようになっている。
【００２２】
なお、ボールスクリュー３６は、端板２４の両側部に、端板２４と直交させて設けられた側壁板２４ａに回動可能に支持されている。また、ボールスクリュー３６は、側板２３の両端部に、端板２４の移動方向に沿う長孔２３ａに挿通されている。つまり、セグメント１の型枠２１からの脱型時において、側板２３同士及び端板２４同士が互いに離間する方向へ移動した際に、ボールスクリュー３６が側板２３と干渉しないようになっている。
【００２３】
次に、上記構造の型枠２１によってセグメント１を製造する場合について説明する。
まず、端板２４に形成された凸部４３の切欠部４４からなる配置位置へ接合金具３を配置させる。ここで、この接合金具３を配置させる際に、接合金具保持機構３１の係合金具３４を、配置位置から外れた位置に移動させておく。
次いで、各接合金具保持機構３１のボールスクリュー３６を回動させて、各係合金具３４を接合金具３側へ移動させる。
【００２４】
このようにすると、この係合金具３４の係合保持部４１が、接合金具３の係合空間８内に入り込み、接合金具３が係合金具３４によって係合されて保持される。
上記のように、端板２４に接合金具３を保持させたら、型枠２１のコンクリート打設空間Ｓ内に鉄筋を配設し、コンクリートを打設する。
その後、コンクリートが硬化したら、接合金具保持機構３１のボールスクリュー３６を逆転させる。
【００２５】
このようにすると、接合金具保持機構３１の係合金具３４が接合金具３の配置位置から外れた位置へ移動し、接合金具３への係合が解除される。
この状態にて、側板２３、端板２４を、セグメント１から引き離し、セグメント１を上方へ吊り上げて、型枠２１から脱型する。
上記の作業を行うことにより、各接合端面１ａに、接合金具３が定位置に配置されたセグメント１が成形される。
【００２６】
以上、説明したように、上記型枠２１によれば、接合金具３を端板２４の凸部４３に形成された切欠部４４からなる配置位置へ配置させた状態にて、接合金具保持機構３１のボールスクリュー３６を回動させることにより、極めて容易に、ガイド金具３３に摺動可能に保持された係合金具３４を移動させて、この係合金具３４の係合保持部４１を接合金具３の係合空間８内へ挿入させて係合させ、この接合金具３を端板２４へ保持させることができる。
【００２７】
また、コンクリート打設空間Ｓへ打設したコンクリートの硬化後においては、接合金具保持機構３１のボールスクリュー３６を逆転させることにより、極めて容易に、係合金具３４を、接合金具３の配置位置から外れた位置へ移動させて、係合金具３４の係合保持部４１を接合金具３の係合空間８から抜き出させて、係合金具３４による接合金具３の係合を解除させることができる。
つまり、接合端面１ａに、連結金具４によって互いに接合可能な接合金具３が所定位置に設けられたセグメント１を極めて容易に製造することができる。
【００２８】
図４に示すものは、他の実施の形態の型枠２１である。
この型枠２１によって製造されるセグメント１は、図５に示すように、一方側の接合端面１ａに接合金具３が設けられ、他方側の接合端面１ａに、雄金具５１が設けられたもので、他方の接合端面１ａの雄金具５１を他のセグメント１の一方の接合金具３へ係合させることにより、互いのセグメント１同士が接合されるようになっている。
つまり、雄金具５１には、その先端部分に、連結金具４の係合部７と同様の係合部５２が形成されており、この係合部５２を、接合金具３の係合空間８内へ挿入することにより、接合金具３に雄金具５１が係合するようになっている。
【００２９】
この構造のセグメント１を製造する型枠２１は、一方側の端板２４に、前記接合金具保持機構３１が設けられ、他方側の端板２４に、雄金具５１を保持させる雄金具保持機構５３が設けられている。
この雄金具保持機構５３は、図６及び図７に示すように、前記ガイド金具３３と、このガイド金具３３に保持された雄金具用の係合金具５４と、この係合金具５４に形成されたねじ孔３５にねじ込まれたボールスクリュー３６とを有しており、前述したように、ガイド金具３３とボールスクリュー３６とから係合金具５４を摺動させる摺動機構が構成されている。
【００３０】
係合金具５４は、ガイド金具３３のスリット３７ｂからの突出側に、係止部６１が形成されている。この係止部６１は、雄金具５１の係合部５２が挿入される係合保持空間６２を有するもので、接合金具３の係止部６と略同一形状に形成されている。つまり、この係止部６１には、雄金具５１の係合部５２の係合面５５に係合する係止面６３を有する係止片部６４が形成されている。
【００３１】
また、雄金具５１が保持される端板２４には、挿入孔（開口部）６６が形成されており、この挿入孔６６から雄金具５１を挿入することができるようになっている。そして、この挿入孔６６へコンクリート打設空間Ｓ側から雄金具５１を挿入した状態にて、雄金具５１が所定位置に配置される。
なお、図中符号５６は、雄金具５１を、セグメント１のコンクリートへ確実に定着させるためのアンカーである。
【００３２】
そして、上記雄金具保持機構５３は、ボールスクリュー３６を回動させることにより、係合金具５４が摺動し、挿入孔６６に挿入される雄金具５１の配置位置と、この配置位置から外れた位置との間を移動するようになっている。
上記構造の雄金具保持機構５３によって雄金具５１を端板２４に保持させる場合は、端板２４に形成された挿入孔６６へ雄金具５１を挿入して所定位置に配置させた状態にて、雄金具保持機構５３のボールスクリュー３６を回動させて、係合金具５４を雄金具５１側へ移動させる。
【００３３】
このようにすると、この係合金具５４の係合保持空間６２に、雄金具５１の係合部５２が入り込むこととなり、雄金具５１が係合金具５４によって係合されて保持され、コンクリート打設空間Ｓへのコンクリートの打設が可能となる。
なお、雄金具５１が挿入される端板２４の挿入孔６６には、打設したコンクリートが漏出しないように、内面側にて塞いでおく。
また、上記の例では、端板２４によって形成される接合端面１ａに接合金具３あるいは雄金具５１を配設する場合について説明したが、側板２３によって形成される接合端面に接合金具３あるいは雄金具５１を配設する場合には、側板２３に接合金具保持機構３１あるいは雄金具保持機構５３を設ければ良い。
【００３４】
【発明の効果】
以上、説明したように、本発明の型枠によれば、下記の効果を得ることができる。
請求項１記載の型枠によれば、接合金具を互いに対向する型枠板の開口部へ挿入して配置させた状態にて、接合金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持部を接合金具の係合空間内へ挿入させて係合させることにより、極めて容易に、この接合金具を端板へ保持させることができる。
また、コンクリート打設空間へ打設したコンクリートの硬化後においては、接合金具保持機構の摺動機構によって係合金具を逆方向へ摺動させることにより、極めて容易に、係合金具の係合保持部を接合金具の係合空間から抜き出させて、係合金具による接合金具の係合を解除させることができる。
つまり、接合端面に、連結金具によって互いに接合可能な接合金具が所定位置に設けられたコンクリート構造物を極めて容易に製造することができる。
【００３５】
請求項２記載の型枠によれば、互いに対向する型枠板のうちの一方の型枠板に接合金具を保持させる場合は、接合金具を型枠板の開口部へ挿入して配置させた状態にて、接合金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持部を接合金具の係合空間内へ挿入させて係合させることにより、極めて容易に、この接合金具を一方の型枠板へ保持させることができる。
また、他方の型枠板に雄金具を保持させる場合は、雄金具を型枠板の開口部へ挿入して配置させた状態にて、雄金具保持機構の摺動機構によって係合金具を移動させて、この係合金具の係合保持空間に雄金具の係合部を挿入させて係合させることにより、極めて容易に、この雄金具を他方の型枠板へ保持させることができる。
また、コンクリート打設空間へ打設したコンクリートの硬化後においては、接合金具保持機構及び雄金具保持機構の摺動機構によって係合金具を逆方向へ摺動させることにより、極めて容易に、係合金具による接合金具及び雄金具の係合を解除させることができる。
つまり、一方側の接合端面の所定位置に接合金具が設けられ、他方側の接合端面の所定位置に接合金具へ係合可能な雄金具が設けられたコンクリート構造物を極めて容易に製造することができる。
【００３６】
請求項３記載の型枠によれば、ボールスクリューを回動させることにより、ガイド金具によって摺動可能に支持された係合金具を、極めて容易に摺動させて、接合金具あるいは雄金具の端板への保持及び保持の解除を行うことができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の型枠の構成及び構造を説明する型枠の平面図である。
【図２】本発明の実施の形態の型枠に設けられた接合金具保持機構を説明する接合金具保持機構及びその周辺の横断面図である。
【図３】本発明の実施の形態の型枠に設けられた接合金具保持機構を説明する接合金具保持機構及びその周辺の縦断面図である。
【図４】本発明の他の実施の形態の型枠の構成及び構造を説明する型枠の平面図である。
【図５】本発明の他の実施の形態の型枠によって製造されるコンクリート構造物であるセグメントを説明するセグメントの互いに接合される接合端面部分の斜視図である。
【図６】本発明の他の実施の形態の型枠に設けられた雄金具保持機構を説明する雄金具保持機構及びその周辺の横断面図である。
【図７】本発明の他の実施の形態の型枠に設けられた雄金具保持機構を説明する雄金具保持機構及びその周辺の縦断面図である。
【図８】接合金具を有するセグメント及び接合金具に係合される連結金具の斜視図である。
【図９】接合金具を有するセグメント及び接合金具に係合される連結金具の断面図である。
【符号の説明】
１セグメント（コンクリート構造物）
１ａ接合端面
３接合金具
４連結金具
５係止片部
７係合部
８係合空間
２１型枠
２２底板
２３側板（型枠板）
２４端板（型枠板）
３１接合金具保持機構
３３ガイド金具
３４係合金具
３５ねじ孔
３６ボールスクリュー
４１係合保持部
４４切欠部（開口部）
５１雄金具
５２係合部
５３雄金具保持機構
５４係合金具
６２係合保持空間
６６挿入孔（開口部）
Ｓコンクリート打設空間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a formwork for manufacturing a precast concrete structure for constructing a tunnel wall body, a road surface and the like by being joined to each other.
[0002]
[Prior art]
As a method for constructing a tunnel, a so-called shield method is generally used in which a tubular wall body is constructed by assembling segments (mainly made of concrete or steel) on the inner surface side of an excavation hole.
As a segment used for this shield method, a rectangular shape in a plan view and an arc plate shape are mainly used, and these segments are joined together by bolts.
As a structure for joining the segments with this bolt, when the joining surfaces of the segments are brought into contact with each other, a joint plate having holes communicating with each other is embedded, and the bolt is inserted into the holes of these joint plates. A structure in which a nut is fastened and joined to the bolt is common. There is also a structure in which insert fittings which are nut members are embedded in the mutual segments, and bolts penetrating through the adjacent segments are fastened and joined together.
[0003]
However, in the above structure, the bolt is inserted into the hole formed in the joint surface of the joint at the construction site, and the nut is fastened to the bolt or the bolt is fastened to the insert fitting embedded in the mutual segment. Since complicated work is required, there is a limit to shortening the assembly time, and adaptation to automatic assembly by a robot has been difficult.
Furthermore, even when the secondary lining is omitted, the bolt box formed in the segment must be closed in order to install the bolts and nuts, and a new joint is aimed at speeding up construction and labor saving. The current situation is that there is an urgent need to develop the structure.
[0004]
Here, the present inventors have developed a segment that can be joined very easily and has a smooth inner surface.
As shown in FIGS. 8 and 9, the segment 1 is formed with a joining groove portion 2 on the joining end face 1 a, and the joining groove portion 2 is provided with a plurality of C-shaped joining fittings 3 in sectional view. These joining fittings 3 are connected to each other by an I-type connecting fitting 4.
The joining metal fitting 3 is provided with a hook-like engaging portion 6 having an engaging piece portion 5 at an opposing position, and a space formed by the engaging piece portions 5 is formed by the engaging portion 7 of the connecting fitting 4. The engagement space 8 is engaged.
[0005]
The locking surface 9 formed by the inner surface of the locking piece 5 is a tapered surface that narrows in the insertion direction of the connecting fitting 4. In other words, in a state where the joining end surfaces 1 a of the segments 1 are abutted with each other, the locking surfaces 9 of the joining fittings 3 facing each other are tapered surfaces that gradually approach toward the rear in the insertion direction of the connecting fitting 4.
[0006]
And when joining the said segments 1, first, the joining end surfaces 1a of these segments 1 are contact | abutted mutually, and the connection metal fitting 4 is inserted in the insertion hole which consists of joining grooves 2. FIG.
By doing so, the engagement surface 10 made of the taper surface of the engagement portion 7 of the connecting metal fitting 4 abuts against the engagement surface 9 made of the taper surface of the engagement piece portion 5 of the joint metal fitting 3 and slides. The respective joining fittings 3 are attracted to each other, thereby joining the segments 1 to each other.
In addition, the connection metal fitting 4 which joins the joining metal fittings 3 of the back side is formed so that the engaging part 7 may pass through the inside of the engagement space 8 of the joining metal fitting 3 on the near side.
Moreover, the code | symbol 11 in the figure is an anchor provided in order to aim at integration with the concrete which forms the segment 1. FIG.
[0007]
[Problems to be solved by the invention]
By the way, when manufacturing the segment 1 which has the said joining structure, another precast concrete structure, etc., it is necessary to hold | maintain the joining metal fitting 3 to a formwork, but conventionally this joining metal fitting 3 is supported accurately and easily. There is no formwork that can be used, and therefore, a concrete structure such as the segment 1 having this joint structure cannot be easily manufactured.
[0008]
This invention is made in view of the said situation, and it aims at providing the formwork which can manufacture easily a concrete structure with smooth inner surface in which the joint was provided in the joining end surface.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the mold according to claim 1 is provided with a C-shaped joint fitting in a cross-sectional view having an engagement piece portion bent at an end portion at an opposing position, and the joint end surfaces are connected to each other. In the butted state, between the joint metal fittings, connecting metal fittings having engaging portions inserted into and engaged with the engagement spaces between the locking pieces of the joint metal fittings are inserted on both sides. Thus, a mold for producing a concrete structure in which the joint metal parts are joined to each other by the joint metal parts, and is connected to each other, comprising a bottom plate and a joint end surface of the concrete structure provided around the bottom plate. A mold plate to be formed, and a joint fitting holding mechanism that is provided on the mold plate facing each other and holds the joint fitting, and a space surrounded by the bottom plate and the mold plate is a concrete placement space. The joint metal The holding mechanism includes an engagement fitting formed with an engagement holding portion engageable with the joining fitting, and sliding the engagement fitting to insert and remove the engagement holding portion into the engagement space of the joining fitting. A sliding mechanism for moving the engagement fitting by the sliding mechanism to an engagement space of the joining fitting inserted from an opening formed at a predetermined position of the mold plate. An engagement holding portion of the engagement fitting is inserted and engaged to hold the joining fitting.
[0010]
As a result, in a state where the joining bracket is inserted and arranged in the opening of the end plate, the engagement fitting is moved by the sliding mechanism of the joining bracket holding mechanism, and the engagement holding portion of the engagement fitting is joined. By inserting the metal fitting into the engagement space of the metal fitting and engaging it, the joint metal fitting is held on the mold plate.
In addition, after the concrete placed in the concrete placement space is hardened, the engagement holding portion of the engagement metal fitting is moved to the opposite direction by sliding the engagement metal fitting in the reverse direction by the sliding mechanism of the connection metal fitting holding mechanism. The engagement fitting is released from the engagement space, and the engagement of the joining fitting by the engagement fitting is released.
[0011]
The mold according to claim 2 is provided with a C-shaped joint fitting in cross-sectional view having an engagement piece portion whose end is bent at an opposing position on one joint end surface, and between the engagement piece portions of the joint fitting. A male fitting having an engaging portion that is inserted into the engaging space and engages is provided on the other joining end surface, and the engaging portion of the male fitting on the other joining end surface is inserted into the engaging space of the joining fitting on one joining end surface. A mold for manufacturing a concrete structure in which the joining metal fitting and the male fitting are joined to each other by being inserted, the bottom plate, and a joint end surface of the concrete structure provided around the bottom plate Forming a metal plate, a metal fitting holding mechanism for holding the metal fitting provided on one of the metal plate opposite to each other, and a male metal plate provided on the other metal plate. Male bracket holding mechanism, and these bottom plate and form plate The enclosed space is a concrete placement space, and the joint fitting holding mechanism slides the engagement fitting with an engagement fitting formed with an engagement holding portion that can be engaged with the joint fitting. And a sliding mechanism for inserting and removing the engagement holding portion into and from the engagement space of the joint fitting, and the male fitting holding mechanism is an engagement holding space in which the engagement portion of the male fitting is engaged. And a sliding mechanism that slides the engagement fitting to insert and remove the engagement portion of the male fitting into the engagement holding space of the engagement fitting. In the frame plate, the engagement holding portion of the engagement fitting is inserted by moving the engagement fitting by the sliding mechanism to the engagement space of the joining fitting inserted from the opening formed at a predetermined position. To hold the joint fitting, and the other mold plate has an opening formed at a predetermined position. The engagement portion of the inserted male fitting is inserted into the engagement holding space of the engagement fitting by moving the engagement fitting by the sliding mechanism to hold the male fitting. It is characterized by letting.
[0012]
As a result, when the joining bracket is held by one mold plate of the mold plates facing each other, the sliding of the joining bracket holding mechanism is performed in a state where the joining bracket is inserted and arranged in the opening of the mold plate. By moving the engagement fitting by the moving mechanism and inserting the engagement holding portion of the engagement fitting into the engagement space of the joining fitting, the joining fitting is held on one mold plate. The
When holding the male fitting on the other mold plate, the engagement fitting is moved by the sliding mechanism of the male fitting holding mechanism with the male fitting inserted into the opening of the mold plate. Then, by inserting the engaging portion of the male fitting into the engagement holding space of the engaging fitting and engaging it, the male fitting is held on the other formwork plate.
In addition, after the concrete placed in the concrete placement space is hardened, the engagement fitting is slid in the reverse direction by the sliding mechanism of the joining fitting holding mechanism and the male fitting holding mechanism, so that The engagement of the joint fitting and the male fitting is released.
[0013]
The mold according to claim 3 is the mold according to claim 1 or 2, wherein the sliding mechanism is formed on a guide metal fitting for slidably holding the engagement metal fitting and the engagement metal fitting. And a ball screw that slides the engagement fitting in accordance with the amount of screwing into the engagement fitting by being screwed into the screw hole and rotated.
In other words, by rotating the ball screw, the engagement fitting supported so as to be slidable by the guide fitting is slid, and the joining fitting or the male fitting is held and released from the form plate.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a formwork according to an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same structure part as a prior art, and description is abbreviate | omitted.
In this embodiment, a formwork for manufacturing the segment 1 will be described by taking the above-described segment 1 constituting a tunnel wall body as a concrete structure as an example.
In FIG. 1, the code | symbol 21 is a formwork. The mold 21 includes a bottom plate 22 that forms the inner peripheral surface of the segment (concrete structure) 1, arc-shaped side plates (formwork plates) 23 provided on both sides of the bottom plate 22, and the side plates 23. An end plate (form plate) 24 that connects both ends is schematically configured, and the joining metal fitting 3 is held on the end plate 24.
[0015]
A space portion formed from the bottom plate 22, the side plate 23, and the end plate 24 is a concrete placement space S, and the concrete placement space S is adapted to the arc plate shape to be formed.
In addition, the side plate 23 and the end plate 24 each have a surface on the concrete placing space S side perpendicular to the bottom plate 22, and the side plate 23 and the end plate 24 are movable in directions away from each other. ing.
[0016]
By placing concrete in the concrete placement space S of the mold 21, the segment 1 in which the inner peripheral surface is formed by the bottom plate 22 and each joining end surface is formed by the side plate 23 and the end plate 24 is manufactured. It is like that.
[0017]
Next, the holding structure of the joining metal fitting 3 to the end plate 24 will be described.
The end plate 24 is provided with a joining metal holding mechanism 31 for holding the joining metal 3 respectively.
As shown in FIGS. 2 and 3, the joint fitting holding mechanism 31 includes a guide fitting 33 fixed to the base plate 32 at the bottom outside the end plate 24, and an engagement fitting 34 held by the guide fitting 33. And a ball screw 36 screwed into a screw hole 35 formed in the engagement fitting 34, and a sliding mechanism for sliding the engagement fitting 34 from the guide fitting 33 and the ball screw 36 is configured. Has been.
[0018]
The guide fitting 33 has a holding portion 37 at the upper portion thereof, and a sliding hole 37a is formed in the holding portion 37 in the longitudinal direction. Further, the holding portion 37 is formed with a slit 37b on one side portion in the longitudinal direction.
The cylindrical portion 34a having the screw hole 35 formed in the engagement fitting 34 is slidably held in the sliding hole 37a formed in the holding portion 37 and protrudes from the slit 37b.
[0019]
The engagement metal fitting 34 has an engagement holding portion 41 formed on the side protruding from the slit 37b. The engagement holding portion 41 is inserted into the engagement space 8 of the joint fitting 3 and is formed in substantially the same shape as the engagement portion 7 of the connection fitting 4. That is, the engagement holding portion 41 has an engagement surface 42 that engages with the engagement surface 9 that is the inner surface of the engagement piece portion 5 of the joint fitting 3.
[0020]
Further, the end plate 24 is formed with a convex portion 43 that forms the groove portion 2 on the joining end surface 1 a of the segment 1. A cutout (opening) 44 is formed in the convex portion 43, and the joint fitting 3 is inserted into the cutout 44 from the concrete placement space S side and arranged.
[0021]
The joint fitting holding mechanism 31 rotates the ball screw 36 so that the engagement fitting 34 slides in accordance with the screwing amount of the ball screw 36 and is arranged in the notch 44 of the convex portion 43. It moves between the arrangement position of the joint fitting 3 and a position deviating from this arrangement position.
[0022]
The ball screw 36 is rotatably supported by side wall plates 24 a provided on both sides of the end plate 24 so as to be orthogonal to the end plate 24. Further, the ball screw 36 is inserted into both ends of the side plate 23 through a long hole 23 a along the moving direction of the end plate 24. That is, when the segment 1 is removed from the mold 21, the ball screw 36 does not interfere with the side plate 23 when the side plates 23 and the end plates 24 move in directions away from each other.
[0023]
Next, the case where the segment 1 is manufactured by the mold 21 having the above structure will be described.
First, the joining metal fitting 3 is arranged at the arrangement position formed by the cutout portion 44 of the convex portion 43 formed on the end plate 24. Here, when the joining metal fitting 3 is arranged, the engagement fitting 34 of the joining metal fitting holding mechanism 31 is moved to a position deviated from the arrangement position.
Next, the ball screw 36 of each joint fitting holding mechanism 31 is rotated to move each engagement fitting 34 to the joint fitting 3 side.
[0024]
If it does in this way, the engagement holding | maintenance part 41 of this engagement metal fitting 34 will enter into the engagement space 8 of the joining metal fitting 3, and the joining metal fitting 3 will be engaged and hold | maintained by the engagement metal fitting 34. FIG.
As described above, when the end fittings 24 hold the joint fitting 3, reinforcing bars are disposed in the concrete placement space S of the mold 21 and concrete is placed.
Thereafter, when the concrete is hardened, the ball screw 36 of the joint fitting holding mechanism 31 is reversed.
[0025]
If it does in this way, the engagement metal fitting 34 of the joint metal fitting holding mechanism 31 will move to the position removed from the arrangement position of the joint metal fitting 3, and the engagement with the joint metal fitting 3 will be cancelled | released.
In this state, the side plate 23 and the end plate 24 are pulled away from the segment 1, the segment 1 is lifted upward, and removed from the mold 21.
By performing the above operation, the segment 1 in which the joint fitting 3 is disposed at a fixed position is formed on each joint end face 1a.
[0026]
As described above, according to the mold 21, the joint fitting holding mechanism 31 is arranged in a state in which the joint fitting 3 is arranged at the arrangement position formed by the cutout portion 44 formed in the convex portion 43 of the end plate 24. By rotating the ball screw 36, the engagement fitting 34 slidably held by the guide fitting 33 is moved very easily, and the engagement holding portion 41 of the engagement fitting 34 is moved to the joining fitting 3. The joint fitting 3 can be held on the end plate 24 by being inserted into the engagement space 8 and engaged therewith.
[0027]
In addition, after the concrete placed in the concrete placement space S is hardened, the engagement fitting 34 can be moved from the position where the joining fitting 3 is arranged very easily by reversing the ball screw 36 of the joining fitting holding mechanism 31. The engagement holding portion 41 of the engagement fitting 34 can be extracted from the engagement space 8 of the joining fitting 3 by moving to the disengaged position, and the engagement of the joining fitting 3 by the engagement fitting 34 can be released. .
In other words, it is possible to manufacture the segment 1 in which the joining fitting 3 that can be joined to each other by the connecting fitting 4 is provided at a predetermined position on the joining end surface 1a.
[0028]
What is shown in FIG. 4 is a formwork 21 of another embodiment.
As shown in FIG. 5, the segment 1 manufactured by the mold 21 is one in which a joining metal fitting 3 is provided on one joining end face 1 a and a male fitting 51 is provided on the other joining end face 1 a. By engaging the male fitting 51 on the other joining end face 1a with one joining fitting 3 of the other segment 1, the segments 1 are joined to each other.
That is, the male fitting 51 is formed with an engaging portion 52 at the tip end thereof, which is the same as the engaging portion 7 of the connecting fitting 4, and this engaging portion 52 is placed in the engaging space 8 of the joining fitting 3. The male fitting 51 is engaged with the joining fitting 3 by being inserted into the fitting fitting 3.
[0029]
The mold 21 for manufacturing the segment 1 having this structure is provided with the joint fitting holding mechanism 31 on the one end plate 24 and the male fitting holding mechanism 53 for holding the male fitting 51 on the other end plate 24. Is provided.
As shown in FIGS. 6 and 7, the male metal fitting holding mechanism 53 is formed on the guide metal fitting 33, a male metal fitting 54 held on the guide metal 33, and the engagement metal 54. The ball screw 36 screwed into the screw hole 35 is provided, and as described above, a sliding mechanism for sliding the engagement fitting 54 from the guide fitting 33 and the ball screw 36 is configured.
[0030]
The engagement fitting 54 has a locking portion 61 formed on the side of the guide fitting 33 protruding from the slit 37b. The engaging portion 61 has an engagement holding space 62 into which the engaging portion 52 of the male metal fitting 51 is inserted, and is formed in substantially the same shape as the engaging portion 6 of the joining metal fitting 3. In other words, the locking portion 61 is formed with a locking piece portion 64 having a locking surface 63 that engages with the engaging surface 55 of the engaging portion 52 of the male metal fitting 51.
[0031]
Further, an insertion hole (opening) 66 is formed in the end plate 24 on which the male metal fitting 51 is held, and the male metal fitting 51 can be inserted from the insertion hole 66. And the male metal fitting 51 is arrange | positioned in the predetermined position in the state which inserted the male metal fitting 51 from the concrete placement space S side to this insertion hole 66. FIG.
Note that reference numeral 56 in the figure denotes an anchor for securely fixing the male metal fitting 51 to the concrete of the segment 1.
[0032]
The male metal fitting holding mechanism 53 is moved from the arrangement position of the male metal fitting 51 inserted into the insertion hole 66 and the arrangement position by rotating the ball screw 36 so that the engagement metal fitting 54 slides. It is designed to move between positions.
When the male metal fitting 51 is held on the end plate 24 by the male metal fitting holding mechanism 53 having the above-described structure, the male metal fitting 51 is inserted into the insertion hole 66 formed in the end plate 24 and arranged at a predetermined position. By rotating the ball screw 36 of the male metal fitting holding mechanism 53, the engagement metal fitting 54 is moved to the male metal fitting 51 side.
[0033]
If it does in this way, the engagement part 52 of the male metal fitting 51 will enter into the engagement holding space 62 of this metal fitting 54, and the male metal fitting 51 will be engaged and hold | maintained by the engagement metal fitting 54, and concrete placement will be carried out. Concrete can be placed in the space S.
The insertion hole 66 of the end plate 24 in which the male metal fitting 51 is inserted is closed on the inner surface side so that the cast concrete does not leak out.
Further, in the above example, the case where the joint metal fitting 3 or the male metal fitting 51 is disposed on the joint end surface 1a formed by the end plate 24 has been described, but the joint metal fitting 3 or the male metal fitting is formed on the joint end surface formed by the side plate 23. When 51 is provided, the joining metal holding mechanism 31 or the male metal fitting holding mechanism 53 may be provided on the side plate 23.
[0034]
【The invention's effect】
As described above, according to the mold of the present invention, the following effects can be obtained.
According to the mold of the first aspect, in the state where the joining metal fitting is inserted and disposed in the opening of the mold plate facing each other, the engaging metal fitting is moved by the sliding mechanism of the joining metal fitting holding mechanism. By inserting the engagement holding portion of the engagement metal fitting into the engagement space of the engagement metal fitting, the engagement metal fitting can be held on the end plate very easily.
In addition, after the concrete placed in the concrete placement space is hardened, it is extremely easy to hold the engagement fitting by sliding the engagement fitting in the reverse direction by the sliding mechanism of the joining fitting holding mechanism. The part can be extracted from the engagement space of the joint fitting, and the engagement of the joint fitting by the engagement fitting can be released.
In other words, it is possible to manufacture a concrete structure in which a joint fitting that can be joined to each other by a joint fitting is provided at a predetermined position on the joint end face.
[0035]
According to the mold according to claim 2, when the joining metal fitting is held on one of the opposite mold paper plates, the joining metal fitting is inserted and arranged in the opening of the formwork plate. In this state, it is extremely easy to move the engagement metal fitting by the sliding mechanism of the metal fitting holding mechanism and insert the engagement holding portion of the metal fitting into the engagement space of the metal fitting to engage with each other. Moreover, this joining metal fitting can be held on one mold plate.
When holding the male fitting on the other mold plate, the engagement fitting is moved by the sliding mechanism of the male fitting holding mechanism with the male fitting inserted into the opening of the mold plate. Then, by inserting the engagement portion of the male metal fitting into the engagement holding space of the engagement metal fitting, the male metal fitting can be held on the other mold plate very easily.
In addition, after the concrete placed in the concrete placement space is hardened, the engagement metal is slid in the opposite direction by the sliding mechanism of the joint metal holding mechanism and the male metal holding mechanism, so that The engagement of the joining metal fitting and the male fitting by the tool can be released.
That is, it is very easy to manufacture a concrete structure in which a joining metal fitting is provided at a predetermined position on one joining end surface and a male fitting capable of engaging with the joining fitting is provided at a predetermined position on the other joining end surface. it can.
[0036]
According to the mold of claim 3, by rotating the ball screw, the engagement fitting supported slidably by the guide fitting can be slid very easily, and the end of the joining fitting or the male fitting can be obtained. The board can be held and released.
[Brief description of the drawings]
FIG. 1 is a plan view of a mold for explaining the configuration and structure of the mold according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a joint fitting holding mechanism and its surroundings for explaining a joint fitting holding mechanism provided in a mold according to an embodiment of the present invention.
FIG. 3 is a longitudinal cross-sectional view of a joint fitting holding mechanism and its periphery for explaining a joint fitting holding mechanism provided in a mold according to an embodiment of the present invention.
FIG. 4 is a plan view of a mold for explaining the configuration and structure of the mold according to another embodiment of the present invention.
FIG. 5 is a perspective view of joint end surface portions of the segments that are joined to each other for explaining the segment that is a concrete structure manufactured by the mold according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view of a male metal fitting holding mechanism and a surrounding area for explaining a male metal fitting holding mechanism provided in a mold according to another embodiment of the present invention.
FIG. 7 is a vertical cross-sectional view of a male metal fitting holding mechanism and a periphery thereof for explaining a male metal fitting holding mechanism provided in a mold according to another embodiment of the present invention.
FIG. 8 is a perspective view of a segment having a joint fitting and a connection fitting engaged with the joint fitting.
FIG. 9 is a cross-sectional view of a segment having a joint fitting and a connection fitting engaged with the joint fitting.
[Explanation of symbols]
1 segment (concrete structure)
DESCRIPTION OF SYMBOLS 1a Joining end surface 3 Joining metal fitting 4 Connecting metal fitting 5 Locking piece part 7 Engagement part 8 Engagement space 21 Mold frame 22 Bottom plate 23 Side plate (form plate)
24 End plate (formwork plate)
31 Joining metal holding mechanism 33 Guide metal fitting 34 Engagement metal fitting 35 Screw hole 36 Ball screw 41 Engagement holding part 44 Notch part (opening part)
51 Male Bracket 52 Engagement Portion 53 Male Bracket Holding Mechanism 54 Engagement Bracket 62 Engagement Holding Space 66 Insertion Hole (Opening)
S Concrete placement space

Claims

Cross-sectional view C-shaped joint fittings having engagement pieces that are bent at the end portions are provided on the joint end faces, and in the state where the joint end faces are abutted with each other, on both sides between the joint fittings. By inserting a connection fitting formed with an engagement portion to be inserted and engaged in the engagement space between the locking piece portions of the joining fitting, the joining fittings are joined to each other by the connection fitting. A formwork for producing a concrete structure to be manufactured,
A bottom plate, a mold plate provided around the bottom plate to form a joint end surface of the concrete structure, and a joint metal holding mechanism provided on the mold plate facing each other and holding the joint metal The space surrounded by the bottom plate and the formwork plate is a concrete placement space.
The joint fitting holding mechanism includes an engagement fitting formed with an engagement holding portion engageable with the joint fitting, and sliding the engagement fitting to engage and hold the engagement fitting in the engagement space. A sliding mechanism for inserting and removing the part,
The engagement holding part of the engagement fitting is moved by moving the engagement fitting by the sliding mechanism to the engagement space of the joining fitting inserted from an opening formed at a predetermined position of the mold plate. A formwork characterized by being inserted and engaged to hold the joint fitting.

A C-shaped joint fitting in cross-sectional view having a locking piece portion whose end is bent at the opposite position is provided on one joining end surface, and is inserted into the engagement space between the locking piece portions of the fitting and engaged. A male fitting having an engaging portion to be provided on the other joining end surface, and inserting the engaging portion of the male fitting on the other joining end surface into the engaging space of the joining fitting on the one joining end surface, A formwork for manufacturing a concrete structure in which male fittings are joined and connected to each other,
A bottom plate, a mold plate provided around the bottom plate to form a joint end surface of the concrete structure, and a joint bracket provided on one mold plate of the mold plate facing each other and holding the joint metal A holding mechanism and a male metal fitting holding mechanism that is provided on the other mold plate and holds the male metal fitting, and a space surrounded by the bottom plate and the mold plate is a concrete placement space;
The joint fitting holding mechanism includes an engagement fitting formed with an engagement holding portion engageable with the joint fitting, and sliding the engagement fitting to engage and hold the engagement fitting in the engagement space. A sliding mechanism for inserting and removing the part,
The male metal fitting holding mechanism includes: an engagement metal fitting in which an engagement holding space is formed to engage the engagement part of the male metal fitting; and sliding the engagement metal fitting to disengage the engagement part of the male metal fitting. A sliding mechanism for inserting into and removing from the engagement holding space of the engagement fitting,
On one mold plate, the engagement fitting is held by moving the engagement fitting by the sliding mechanism to the engagement space of the joining fitting inserted from an opening formed at a predetermined position. Inserting and engaging the part to hold the joint fitting,
In the other mold plate, the engagement fitting of the male fitting inserted from the opening formed at a predetermined position is moved and held by moving the engagement fitting by the sliding mechanism. A formwork characterized by being inserted into a space and engaged to hold the male fitting.

The sliding mechanism is screwed into a guide fitting that holds the engagement fitting in a slidable manner and a screw hole formed in the engagement fitting, and is turned to a screwing amount into the engagement fitting. The mold according to claim 1, further comprising a ball screw that slides the engagement fitting.