JP2004293172A

JP2004293172A - Joint structure of segment

Info

Publication number: JP2004293172A
Application number: JP2003087446A
Authority: JP
Inventors: Yoshinobu Suzuki; 義信鈴木; Kunihiro Nagamori; 邦博永森; Kosuke Furuichi; 耕輔古市; Kentaro Yoshida; 健太郎吉田; Yusuke Saito; 祐輔斉藤; Yutaka Fujino; 豊藤野; Yasushi Sakuma; 靖佐久間; Satoshi Onoe; 聡尾上
Original assignee: Kajima Corp; Geostr Corp
Current assignee: Kajima Corp; Geostr Corp
Priority date: 2003-03-27
Filing date: 2003-03-27
Publication date: 2004-10-21
Anticipated expiration: 2023-03-27
Also published as: JP3916583B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide the joint structure of a segment, in which the structure of a container case for a worm gearing is not complicated even when the warm gearing is used and a power is transmitted smoothly in the case. <P>SOLUTION: Only the container case 7 is installed when the segment is formed, and the worm gearing 6 and a bolt 4 for a joining are mounted in the case 7 by utilizing a containing section 7a opened to the joint surface 2a of the segment 2 after the formation of the segment. The penetration or the like of cast concrete need not be cared, and the structure of the case 7 in which the gearing 6 is contained need not be complicated when the segment is formed. The power in the case 7 after an assembly into the segment 2 is most transmitted smoothly by securing the gearing 6 and the bolt 4 after the formation of the segment. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、セグメントの内面を平滑にすると共に、セグメントの組立後に増締めを行えるようにするために、ウォーム伝動装置を用いて接合できるようにしたセグメントの継手構造に関するものである。
【０００２】
【従来の技術】
ウォーム伝動装置を用いて両セグメントを接合するものとしては、例えば、特許文献１の「セグメントの継手装置」、特許文献２の「セグメントの継手構造」、特許文献３の「セグメントの継手装置」が知られている。
【０００３】
なお、特許文献１の継手装置は、セグメントのスライドで両セグメントに設けた雄継手（接合用ボルト）および雌継手を互いに係止させた後、ウォーム伝動装置の利用で両セグメントを引き寄せ互いの接合面を当面させて接合するものである。
【０００４】
また、特許文献２の継手構造および特許文献３の継手装置は、ウォーム伝動装置の利用で、両セグメントの雄継手（接合用ボルト）および雌継手の係合と両セグメントを引き寄せとを行うものである。
【０００５】
【特許文献１】
特開２００１−３２３７８８号公報
【特許文献２】
特開２０００−３２８８９２号公報
【特許文献３】
特開２００２−８９１９２号公報
【０００６】
【発明が解決しようとする課題】
セグメントの接合に用いるウォーム伝動装置は、ウォームをセグメントの内面から挿入してウォームホイールを回転させ、ウォームホイールの回転軸として設けた接合用ボルトを移動させるものである。
【０００７】
そのため、このウォーム伝動装置を用いる、前述した従来の継手装置および継手構造では、ウォーム伝動装置を収納するケースが複雑な構造になってしまう傾向にある。
【０００８】
即ち、ウォーム伝動装置の収納ケースは、ウォームおよびウォームホイールや接合用ボルトなどを組み込んで収納できるようにすると共に、ウォームとウォームホイールとの噛み合い部分に打設コンクリートが入り込まないようにする等から、複雑な構造になってしまう。
【０００９】
また、このウォーム伝動装置が組み込まれて複雑な構造になった収納ケースを型枠内にセットする作業も、打設コンクリートが入り込まないようにする等、面倒なものとなる。
【００１０】
さらに、このウォーム伝動装置が組み込まれて複雑な構造になった収納ケースでは、セグメントの内部に設けた後、セグメントの内面より挿入したウォームからのウォームホイールおよび接合用ボルトへの動力伝達がスムーズに行えなくなってしまう問題点もあった。
【００１１】
この発明は前述した事情に鑑みて創案されたもので、その目的はウォーム伝動装置を用いても、その収納ケースの構造が複雑にならないと共に、収納ケース内において動力伝達がスムーズに行えるセグメントの継手構造を提供することにある。
【００１２】
【課題を解決するための手段】
この発明での継手構造は、接合すべき一方のセグメントに設けた雄継手の接合用ボルトの係止部を、接合すべき他方のセグメントに設けた雌継手に係止すると共に、接合用ボルトをウォーム伝動装置で移動させることにより、両セグメントを引き寄せ互いの接合面を当面させて接合するものとする。
【００１３】
この継手構造の雄継手は、接合用ボルトのネジ部がウォームホイールにその回転軸として螺合している前記ウォーム伝動装置と、セグメントの接合面に開口する収納部が形成された収納ケースとを備えている。
【００１４】
また、この継手構造の接合用ボルトは、その係止部とウォームホイールに螺合しているネジ部との間に前蓋部を設けている。しかも、この前蓋部は、収納部におけるセグメントの接合面側に螺合して、収納ケースの収納部の開口を塞ぐことができるように構成している。
【００１５】
そして、この発明での継手構造は、前蓋部を収納ケースの収納部に螺合した時に、ウォーム伝動装置が収納部内に納まると共に、接合用ボルトが前蓋部を貫通してその係止部が収納部外となるように構成している。
【００１６】
このようなこの発明（請求項１の発明）の継手構造によれば、収納ケースの収納部がセグメントの接合面に開口していると共に、その開口を前蓋部で塞ぐことにより、ウォーム伝動装置が収納部内に収まり、接合用ボルトが前蓋部を貫通してその係止部が収納部外となる。
【００１７】
このことは、「収納部の前蓋部が螺合する部分を利用してセグメント形成用の型枠に収納ケースを取り付けると共に、型枠内にコンクリートを打設してセグメントを形成し、その後、型枠を取り外して、セグメントの接合面に開口した収納ケースの収納部に前蓋部を螺合することで、ウォーム伝動装置および接合用ボルトを取り付ける。」ということができるようになる。
【００１８】
即ち、「セグメントの形成時には収納ケースのみを取り付け、セグメント形成後に、セグメントの接合面に開口した収納部を利用して、ウォーム伝動装置および接合用ボルトを収納ケースに取り付ける。」ということが行える。
【００１９】
従って、セグメント形成時において、打設コンクリートの入り込み等を気にする必要がないので、収納ケースの構造を複雑にする必要がなくなる。
【００２０】
また、セグメント形成後に、ウォーム伝動装置および接合用ボルトを取り付けるので、セグメント内に組み込んだ後に収納ケース内での動力伝達がスムーズに行えなくなるようなことを少なくできる。
【００２１】
【発明の実施の形態】
以下、この発明のセグメントの継手構造を図示する一実施形態によって説明する。
【００２２】
継手構造１（請求項１の発明）は、図１および図２に示すように、接合すべき一方のセグメント２に設けた雄継手３の接合用ボルト４の係止部４ａを、接合すべき他方のセグメント２に設けた雌継手５に係止すると共に、接合用ボルト４をウォーム伝動装置６で移動させることにより、両セグメント２を引き寄せ互いの接合面２ａを当面させて両セグメント２を接合している。
【００２３】
また、雄継手３は、接合用ボルト４のネジ部４ｂがウォームホイール６ａにその回転軸として螺合しているウォーム伝動装置６と、セグメント２の接合面２ａに開口する収納部７ａが形成された収納ケース７とを備えている。
【００２４】
さらに、接合用ボルト４は、その係止部４ａと、ウォームホイール６ａに螺合しているネジ部４ｂとの間に前蓋部８を設けている。また、収納ケース７の収納部７ａは、そのセグメント２の接合面２ａ側に前蓋部８を螺合して開口を塞ぐことができるように構成している。
【００２５】
そして、この継手構造１は、前蓋部８を収納ケース７の収納部７ａに螺合した時に、ウォーム伝動装置６が収納部７ａ内に納まると共に、接合用ボルト４が前蓋部８を貫通してその係止部４ａが収納部７ａ外となるように構成している。
【００２６】
なお、図６に、この発明の継手構造１としたセグメント２を示す。また、図５に、セグメント２の桁高が高い場合の構造例を示している。
【００２７】
この実施形態での収納ケース７には、ウォームホイール６ａに噛み合わせるウォーム６ｂを挿入するための挿入孔７ｂ（図３参照）が形成されている。そして、この挿入孔７ｂは、そのウォーム６ｂの挿入側に、止水用栓９を螺合できるように構成している（請求項２の発明）。
【００２８】
この実施形態での収納ケース７の挿入孔７ｂは、図３に示すように、止水用栓９が螺合するネジ部７ｃの形成部分である内周面を、ウォーム６ｂの外周径よりも大きな径で形成している（請求項３の発明）。
【００２９】
この実施形態でのウォーム６ｂは、図３に示すように、その挿入孔７ｂへの挿入端に軸固定用凸部６ｃを形成している。また、この実施形態での挿入孔７ｂの底部には、図３に示すように、ウォームウォーム６ｂの軸固定用凸部６ｃが係合する軸固定用凹部７ｄを形成している（請求項４の発明）。
【００３０】
この実施形態でのウォーム６ｂの挿入端に形成した軸固定用凸部６ｃは、図３に示すように、半球形状にしている（請求項５の発明）。
【００３１】
この実施形態でのウォームホイール６ａは、図２に示すように、その側面に、回転軸となる接合用ボルト４の近接部分に突出部分６ｄを形成している。しかも、この実施形態でのウォームホイール６ａは、図１に示すように、その突出部分６ｄが収納ケース７または前蓋部８に当面するようにして設けている（請求項６の発明）。
【００３２】
この実施形態において、雄継手３の接合用ボルト４の係止部４ａと雌継手５との係止は、図６に示すように、セグメント２のスライドによって接合用ボルト４の係止部４ａを雌継手５に挿入することで行えるように構成している。しかも、雌継手５の係止部４ａの挿入側は、図４に示すように、挿入を容易にするテーパー５ａを形成してある（請求項７の発明）。
【００３３】
この実施形態での接合用ボルト４の係止部４ａは、図４に示すように、雌継手５側の面を曲面で形成したボルト頭で構成している（請求項８の発明）。なお、この接合用ボルト４の係止部４ａは、この実施形態のように曲面で形成したボルト頭に限らず、一般的な六角形状のボルト頭（図示せず）で構成してよい。
【００３４】
この実施形態での接合用ボルト４には、図１および図２に示すように、係止部４ａとは反対側であるウォームホイール６ａに螺合しているネジ部４ｂの先端部に供回り防止用ナット１２を設けていると共に、収納ケース７には、その収納部７ａの底部に供回り防止用ナット１２を収納できる供回り防止用ナット収納部１３を形成している。
【００３５】
そして、ウォーム伝動装置６が収納部７ａ内に納まると共に、接合用ボルト４が前蓋部８を貫通してその係止部４ａが収納部７ａ外となる時に、供回り防止用ナット１２が供回り防止用ナット収納部１３の内部に入り込んで、接合用ボルト４のウォームホイール６ａとの供回りを防止できるように構成している（請求項９の発明）。
【００３６】
この実施形態での収納ケース７は、図１および図２に示すように、セグメント２の接合面２ａとは反対側に、定着部１０を一体に形成している（請求項１０の発明）。
【００３７】
このような構成からなる、この発明（請求項１の発明）の継手構造１によれば、収納ケース７の収納部７ａがセグメント２の接合面２ａに開口していると共に、その開口を前蓋部８で塞ぐことにより、ウォーム伝動装置６が収納部７ａ内に収まり、接合用ボルト４が前蓋部８を貫通してその係止部４ａが収納部７ａ外となる。
【００３８】
このことは、「収納部７ａの前蓋部８が螺合する部分を利用して、セグメント形成用の型枠１１（図２参照）に収納ケース７を取り付けると共に、型枠１１内にコンクリートを打設してセグメントを形成し、その後、型枠１１を取り外して、セグメント２の接合面２ａに開口した収納ケース７の収納部７ａに前蓋部を螺合することで、ウォーム伝動装置６および接合用ボルト４を取り付ける。」ということができるようになる。
【００３９】
即ち、「セグメント２の形成時には収納ケース７のみを取り付け、セグメント形成後に、セグメント２の接合面２ａに開口した収納部７ａを利用して、ウォーム伝動装置６および接合用ボルト４を収納ケース７に取り付ける。」ということが行える。
【００４０】
従って、セグメント形成時において、打設コンクリートの入り込み等を気にする必要がないので、収納ケース７の構造を複雑にする必要がなくなる。
【００４１】
また、セグメント形成後に、ウォーム伝動装置６および接合用ボルト４を取り付けるので、セグメント２内に組み込んだ後に収納ケース７内での動力伝達がスムーズに行えなくなるようなことを少なくできる。
【００４２】
なお、これらのことの他に、請求項２の発明の構成によれば、止水用栓９によって、収納ケース７に形成されている挿入孔７ｂを確実に塞ぐことができる。
【００４３】
従って、セグメント２の組み立て時に、ウォームホイール６ａを回動させるべく必要なウォーム６ｂの挿入孔７ｂを、セグメント２の組み立て後に、確実に塞ぐことができる。
【００４４】
このことは、セグメント２の組み立て後の止水を確実に行えるようになり、ウォーム伝動装置６内への浸水を確実に阻止して、ウォーム伝動装置６を用いた継手能力を確実に保持することができる。
【００４５】
請求項３の発明の構成によれば、止水用栓９が螺合するネジ部７ｃの形成部分である内周面を、ウォーム６ｂの外周径よりも大きな径で形成したことにより、収納ケース７の挿入孔７ｂに挿入したウォーム６ｂの外周面が、挿入孔７ｂのネジ部７ｃに接触することを防止できる。
【００４６】
このことは、ウォーム６ｂの回転をスムーズなものにすることができて、ウォームホイール６ａへの動力伝達がスムーズに行えるようになる。
【００４７】
請求項４の発明の構成によれば、ウォーム６ｂに形成した軸固定用凸部６ｃと、この軸固定用凸部６ｃが係合するように挿入孔７ｂの底部に形成した軸固定用凹部７ｄとにより、ウォーム回転軸のぶれを阻止することができる。
【００４８】
このことからも、ウォーム６ｂの回転をスムーズなものにすることができて、ウォームホイール６ａへの動力伝達がスムーズに行えるようになる。
【００４９】
請求項５の発明の構成によれば、ウォーム６ｂの軸固定用凸部６ｃを半球形状としたことにより、ウォーム６ｂの回転をよりスムーズなものにすることができて、ウォームホイール６ａへの動力伝達がスムーズに行えるようになる。
【００５０】
請求項６の発明の構成によれば、接合用ボルト４（回転軸）の近接部分である側面に形成した突出部分６ｄが、収納ケース７または前蓋部８に当面するようにして、ウォームホイール６ａを収納ケース７の内部に設けている。
【００５１】
このことは、ウォームホイール６ａにおける歯の部分が収納ケース７または前蓋部８に当面することを阻止し、ウォームホイール６ａの回転をスムーズなものにすることができて、ウォーム６ｂからの動力伝達がスムーズに行えるようになる。
【００５２】
請求項７の発明の構成によれば、セグメント２のスライドによって接合用ボルト４の係止部４ａを雌継手５に挿入することにより、雄継手３の接合用ボルト４の係止部４ａと雌継手５との係止か行える。しかも、雌継手５の係止部４ａの挿入側にはテーパー５ａを形成している。
【００５３】
このことは、セグメント２をスライドするだけで、セグメント２の組み立てを極めて容易に行うことができる。
【００５４】
請求項８の発明の構成によれば、接合用ボルト４の係止部４ａを、雌継手５側の面を曲面で形成したボルト頭で構成したことにより、係止部４ａの雌継手５への挿入が容易になると共に、雌継手５への挿入時に接合用ボルト４の軸線と接合軸とがずれていても対処することができる。
【００５５】
請求項９の発明の構成によれば、接合用ボルト４に固定（溶接）した供回り防止用ナット１２が、収納ケース７の収納部７ａの底部に形成した供回り防止用ナット収納部１３の内部に入り込むようにしたことにより、供回り防止用ナット１２（接合用ボルト４）の回転を防止できる。
【００５６】
このことから、ウォームホイール６ａが回転しても、接合用ボルト４は、回転せずに軸方向へ引き込むことができる。
【００５７】
なお、供回り防止用ナット収納部１３は、供回り防止用ナット１２との間隙が小さく、供回り防止用ナット１２の回転を止めることのできる形状とする。
【００５８】
請求項１０の発明の構成によれば、収納ケース７における、セグメント２の接合面２ａとは反対側に、定着部１０を一体に形成している（例えば、鋳造などで一体に形成している）ことにより、収納ケース７をより簡単な構造にできると共に、収納ケース７をセグメント２に強固に設けることができる。
【００５９】
この収納ケース７に定着部１０を一体に形成することは、「セグメント２の形成時に収納ケース７のみを取り付け、セグメント形成後に、セグメント２の接合面２ａに開口した収納部７ａを利用して、ウォーム伝動装置６および接合用ボルト４を収納ケース７に取り付ける。」という請求項１の発明の構成にしていることで、行えることである。
【００６０】
これらのことから、この発明によれば、セグメント２の内面を平滑にすると共に、セグメント２の組立後に増締めを行えるようにするために、ウォーム伝動装置６を用いて接合できるようにしても、その収納ケース７の構造が複雑にならないと共に、収納ケース７内において動力伝達がスムーズに行えて、セグメント２の接合を容易かつ確実に行える継手構造１を提供できる。
【００６１】
【発明の効果】
この発明のセグメントの継手構造によれば、セグメントの形成時に収納ケースのみを取り付け、セグメント形成後に、セグメントの接合面に開口した収納部を利用して、ウォーム伝動装置および接合用ボルトを収納ケースに取り付けることができる。
【００６２】
そのため、セグメント形成時において、打設コンクリートの入り込み等を気にする必要がないので、ウォーム伝動装置を収納する収納ケースの構造を複雑にする必要がなくなる。
【００６３】
また、セグメント形成後に、ウォーム伝動装置および接合用ボルトを取り付けるので、セグメント内に組み込んだ後に収納ケース内での動力伝達がスムーズに行えなくなるようなことを少なくできる。
【図面の簡単な説明】
【図１】この発明のセグメントの継手構造を示す概略断面図である。
【図２】この発明の継手構造で用いる雄継手とすべくウォーム伝動装置および接合用ボルトの収納ケースへの取り付け状態を示す概略断面図である。
【図３】この発明の継手構造で用いるウォーム伝動装置および収納ケースを示す概略断面図である。
【図４】（ａ）はこの発明の継手構造で用いる雌継手を示す図６のＢ−Ｂ線拡大矢視図で、（ｂ）は（ａ）のＡ−Ａ線矢視図である。
【図５】この発明の継手構造を桁高が高いセグメントに用いた状態を示す概略断面図である。
【図６】この発明の継手構造を用いたセグメントを示す概略斜視図である。
【符号の説明】
１…継手構造１、２…セグメント、２ａ…接合面、３…雄継手、４…接合用ボルト、４ａ…係止部、４ｂ…ネジ部、５…雌継手、５ａ…テーパー、６…ウォーム伝動装置、６ａ…ウォームホイール、６ｂ…ウォーム、６ｃ…軸固定用凸部、６ｄ…突出部分、７…収納ケース、７ａ…収納部、７ｂ…挿入孔、７ｃ…ネジ部、７ｄ…軸固定用凹部、８…前蓋部、９…止水用栓、１０…定着部、１１…型枠、１２…供回り防止用ナット、１３…供回り防止用ナット収納部。[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a segment which can be joined using a worm transmission in order to smooth the inner surface of the segment and to perform retightening after assembling the segment.
[0002]
[Prior art]
As a device for joining both segments using a worm transmission, for example, a “segment coupling device” of Patent Document 1, a “segment coupling structure” of Patent Document 2, and a “segment coupling device” of Patent Document 3 are described. Are known.
[0003]
In the joint device of Patent Document 1, after the male joint (joining bolt) and the female joint provided on both segments are engaged with each other by sliding the segments, the segments are pulled together by using a worm transmission device and joined to each other. The surfaces are brought into contact for bonding.
[0004]
Further, the joint structure of Patent Document 2 and the joint device of Patent Document 3 perform engagement of a male joint (joining bolt) and a female joint of both segments and pulling of both segments by using a worm transmission. is there.
[0005]
[Patent Document 1]
JP 2001-323788 A [Patent Document 2]
JP 2000-328892 A [Patent Document 3]
JP-A-2002-89192 [0006]
[Problems to be solved by the invention]
The worm transmission device used for joining the segments is such that the worm is inserted from the inner surface of the segment to rotate the worm wheel, and the joining bolt provided as the rotation shaft of the worm wheel is moved.
[0007]
Therefore, in the above-described conventional coupling device and coupling structure using the worm transmission, the case for housing the worm transmission tends to have a complicated structure.
[0008]
That is, the storage case of the worm transmission device can be stored by incorporating the worm and the worm wheel and the connecting bolts, and the cast concrete is prevented from entering the meshing portion between the worm and the worm wheel. It becomes a complicated structure.
[0009]
In addition, the work of setting the storage case having a complicated structure into which the worm transmission device is incorporated into the formwork is troublesome, for example, to prevent the casting concrete from entering.
[0010]
Furthermore, in a storage case with a complicated structure incorporating this worm transmission device, after being provided inside the segment, the power transmission from the worm inserted from the inner surface of the segment to the worm wheel and joining bolts smoothly. There was also a problem that could not be performed.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object the purpose of using a worm power transmission device without complicating the structure of the storage case and enabling smooth power transmission within the storage case. It is to provide structure.
[0012]
[Means for Solving the Problems]
In the joint structure according to the present invention, the engaging portion of the joining bolt of the male joint provided on one segment to be joined is engaged with the female joint provided on the other segment to be joined, and By being moved by the worm transmission, both segments are drawn and brought into contact with each other so that the joining surfaces are brought into contact with each other.
[0013]
The male joint of this joint structure includes the worm transmission in which the screw portion of the joining bolt is screwed to the worm wheel as its rotation axis, and a storage case in which a storage portion that opens to the joint surface of the segment is formed. Have.
[0014]
Further, the joining bolt of this joint structure has a front lid portion between the locking portion and the screw portion screwed to the worm wheel. In addition, the front lid is configured to be screwed into the joint surface side of the segment in the storage portion so as to close the opening of the storage portion of the storage case.
[0015]
In the joint structure according to the present invention, when the front lid portion is screwed into the storage portion of the storage case, the worm transmission device is accommodated in the storage portion, and the joining bolt penetrates the front lid portion and the locking portion thereof. Is arranged outside the storage section.
[0016]
According to such a joint structure of the present invention (the first aspect of the present invention), the storage portion of the storage case is opened at the joint surface of the segment, and the opening is closed by the front lid portion, so that the worm transmission device is provided. Fits inside the storage section, the joining bolt penetrates through the front lid section, and its locking section is outside the storage section.
[0017]
This means, "Attaching the storage case to the mold frame for forming a segment using the portion where the front lid of the storage section is screwed, and casting concrete in the mold to form the segment, By removing the formwork and screwing the front lid portion into the storage portion of the storage case opened to the joint surface of the segment, the worm transmission device and the connection bolt are attached. "
[0018]
That is, it can be said that "only the storage case is attached at the time of forming the segment, and after the segment is formed, the worm transmission device and the connection bolt are attached to the storage case using the storage portion opened at the joint surface of the segment."
[0019]
Therefore, when forming the segments, it is not necessary to worry about the intrusion of the cast concrete and the like, so that the structure of the storage case does not need to be complicated.
[0020]
Further, since the worm transmission and the connecting bolt are attached after the segment is formed, it is possible to reduce the possibility that the power transmission in the storage case cannot be smoothly performed after the worm transmission and the joining bolt are assembled into the segment.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a joint structure of a segment according to the present invention will be described with reference to an embodiment shown in the drawings.
[0022]
In the joint structure 1 (invention of claim 1), as shown in FIGS. 1 and 2, the engaging portion 4a of the joint bolt 4 of the male joint 3 provided on one segment 2 to be joined should be joined. By engaging the female joint 5 provided on the other segment 2 and moving the joining bolt 4 with the worm transmission 6, the two segments 2 are pulled to bring the joining surfaces 2a of each other into contact and join the two segments 2 together. are doing.
[0023]
The male joint 3 is formed with a worm transmission 6 in which a screw portion 4b of a joining bolt 4 is screwed to a worm wheel 6a as a rotation shaft thereof, and a storage portion 7a opened on a joining surface 2a of the segment 2. Storage case 7.
[0024]
Further, the joining bolt 4 is provided with a front lid portion 8 between the locking portion 4a and a screw portion 4b screwed to the worm wheel 6a. Further, the storage portion 7a of the storage case 7 is configured so that the front lid portion 8 can be screwed into the joint surface 2a side of the segment 2 to close the opening.
[0025]
In the joint structure 1, when the front cover 8 is screwed into the storage portion 7 a of the storage case 7, the worm transmission 6 is accommodated in the storage portion 7 a, and the joining bolt 4 penetrates the front cover 8. Then, the locking portion 4a is configured to be outside the storage portion 7a.
[0026]
FIG. 6 shows a segment 2 having a joint structure 1 according to the present invention. FIG. 5 shows a structural example in the case where the digit height of the segment 2 is high.
[0027]
In the storage case 7 in this embodiment, an insertion hole 7b (see FIG. 3) for inserting the worm 6b meshing with the worm wheel 6a is formed. The insertion hole 7b is configured so that the water stop plug 9 can be screwed into the insertion side of the worm 6b (the invention of claim 2).
[0028]
As shown in FIG. 3, the insertion hole 7b of the storage case 7 in this embodiment is configured such that the inner peripheral surface, which is the portion where the threaded portion 7c into which the water stop plug 9 is screwed, is formed larger than the outer diameter of the worm 6b. It is formed with a large diameter (the invention of claim 3).
[0029]
As shown in FIG. 3, the worm 6b in this embodiment has a shaft fixing convex portion 6c formed at the insertion end of the worm 6b into the insertion hole 7b. Further, as shown in FIG. 3, a shaft fixing concave portion 7d with which the shaft fixing convex portion 6c of the worm worm 6b engages is formed at the bottom of the insertion hole 7b in this embodiment. Invention).
[0030]
The shaft fixing projection 6c formed at the insertion end of the worm 6b in this embodiment has a hemispherical shape as shown in FIG. 3 (the invention of claim 5).
[0031]
As shown in FIG. 2, the worm wheel 6a in this embodiment has a protruding portion 6d formed on a side surface of the worm wheel 6a in the vicinity of the joining bolt 4 serving as a rotating shaft. In addition, the worm wheel 6a in this embodiment is provided such that the protruding portion 6d faces the storage case 7 or the front lid 8, as shown in FIG. 1 (the invention of claim 6).
[0032]
In this embodiment, the locking portion 4a of the joint bolt 4 of the male joint 3 and the female joint 5 are locked by sliding the segment 2 as shown in FIG. It is configured so that it can be performed by inserting it into the female joint 5. Further, the insertion side of the locking portion 4a of the female joint 5 is formed with a taper 5a for facilitating insertion as shown in FIG. 4 (the invention of claim 7).
[0033]
As shown in FIG. 4, the locking portion 4a of the joining bolt 4 in this embodiment is formed by a bolt head having a curved surface on the female joint 5 side (the invention of claim 8). The locking portion 4a of the joining bolt 4 is not limited to a bolt head formed with a curved surface as in this embodiment, but may be a general hexagonal bolt head (not shown).
[0034]
As shown in FIGS. 1 and 2, the joining bolt 4 in this embodiment rotates around a tip end of a screw portion 4b screwed to the worm wheel 6a on the opposite side to the locking portion 4a. In addition to providing the nut 12 for prevention, the storage case 7 is provided with a nut storage part 13 for rotation prevention which can store the nut 12 for rotation prevention at the bottom of the storage part 7a.
[0035]
When the worm transmission device 6 is housed in the storage portion 7a and the joining bolt 4 passes through the front lid portion 8 and the locking portion 4a is outside the storage portion 7a, the rotation preventing nut 12 is provided. It is configured such that it can enter the inside of the nut housing 13 for rotation prevention and prevent the joint bolt 4 from rotating with the worm wheel 6a (the invention of claim 9).
[0036]
In the storage case 7 in this embodiment, as shown in FIGS. 1 and 2, a fixing portion 10 is integrally formed on the opposite side of the joining surface 2 a of the segment 2 (the invention of claim 10).
[0037]
According to the joint structure 1 of the present invention (invention of claim 1) having such a configuration, the storage portion 7a of the storage case 7 opens to the joint surface 2a of the segment 2, and the opening is formed by the front lid. By closing with the part 8, the worm transmission 6 is accommodated in the storage part 7a, and the connecting bolt 4 penetrates the front lid part 8, and the locking part 4a is outside the storage part 7a.
[0038]
This means that “the housing case 7 is attached to the segment forming mold 11 (see FIG. 2) by using the portion of the housing 7a into which the front lid 8 is screwed, and at the same time, concrete is put into the mold 11. The segments are formed by casting, and then the formwork 11 is removed, and the front lid portion is screwed into the storage portion 7a of the storage case 7 opened to the joint surface 2a of the segment 2, so that the worm transmission 6 and Attach the joining bolt 4. "
[0039]
That is, "only the storage case 7 is attached when the segment 2 is formed, and after the segment is formed, the worm transmission device 6 and the connection bolt 4 are connected to the storage case 7 by using the storage portion 7a opened in the connection surface 2a of the segment 2. Attach. "
[0040]
Therefore, at the time of forming the segments, there is no need to worry about the intrusion of the cast concrete, so that the structure of the storage case 7 does not need to be complicated.
[0041]
Further, since the worm transmission 6 and the joining bolts 4 are attached after the segment is formed, it is possible to reduce the possibility that the power transmission in the storage case 7 cannot be smoothly performed after the worm transmission 6 and the joining bolt 4 are assembled in the segment 2.
[0042]
In addition to the above, according to the configuration of the second aspect of the present invention, the water blocking plug 9 can reliably close the insertion hole 7b formed in the storage case 7.
[0043]
Therefore, the insertion hole 7b of the worm 6b necessary for rotating the worm wheel 6a when assembling the segment 2 can be reliably closed after assembling the segment 2.
[0044]
This makes it possible to reliably stop water after assembling the segment 2, to reliably prevent water from entering the worm transmission 6, and to reliably maintain the joint capacity using the worm transmission 6. Can be.
[0045]
According to the configuration of the third aspect of the present invention, the inner peripheral surface, which is the portion where the water blocking plug 9 is screwed with the screw portion 7c, is formed with a diameter larger than the outer diameter of the worm 6b. 7 can be prevented from contacting the outer peripheral surface of the worm 6b inserted into the insertion hole 7b of the insertion hole 7b.
[0046]
As a result, the rotation of the worm 6b can be made smooth, and the power can be smoothly transmitted to the worm wheel 6a.
[0047]
According to the configuration of the invention of claim 4, the shaft fixing convex portion 6c formed on the worm 6b and the shaft fixing concave portion 7d formed on the bottom of the insertion hole 7b so that the shaft fixing convex portion 6c engages. Thus, the displacement of the worm rotation shaft can be prevented.
[0048]
From this, the rotation of the worm 6b can be made smooth, and the power can be smoothly transmitted to the worm wheel 6a.
[0049]
According to the configuration of the fifth aspect of the invention, since the shaft fixing convex portion 6c of the worm 6b has a hemispherical shape, the rotation of the worm 6b can be made smoother, and the power to the worm wheel 6a can be increased. Transmission can be performed smoothly.
[0050]
According to the configuration of the sixth aspect of the present invention, the worm wheel is configured such that the protruding portion 6 d formed on the side surface that is the proximity portion of the joining bolt 4 (rotary shaft) faces the storage case 7 or the front lid portion 8. 6 a is provided inside the storage case 7.
[0051]
This prevents the teeth of the worm wheel 6a from coming into contact with the storage case 7 or the front lid 8, and can make the rotation of the worm wheel 6a smooth, and the power transmission from the worm 6b. Can be performed smoothly.
[0052]
According to the configuration of the seventh aspect of the present invention, the engaging portion 4a of the joining bolt 4 of the male joint 3 is inserted into the female joint 5 by inserting the engaging portion 4a of the joining bolt 4 into the female joint 5 by sliding the segment 2. Engagement with the joint 5 can be performed. Further, a taper 5a is formed on the insertion side of the locking portion 4a of the female joint 5.
[0053]
This makes it very easy to assemble the segment 2 simply by sliding the segment 2.
[0054]
According to the configuration of the eighth aspect of the present invention, the locking portion 4a of the joining bolt 4 is formed by a bolt head whose surface on the female joint 5 side is formed as a curved surface. Can be easily inserted, and even if the axis of the joining bolt 4 and the joining axis are misaligned at the time of insertion into the female joint 5, it can be dealt with.
[0055]
According to the configuration of the ninth aspect of the present invention, the rotation preventing nut 12 fixed (welded) to the joining bolt 4 is provided on the bottom of the storage portion 7 a of the storage case 7. The rotation of the rotation prevention nut 12 (joining bolt 4) can be prevented by entering the inside.
[0056]
For this reason, even if the worm wheel 6a rotates, the joining bolt 4 can be pulled in the axial direction without rotating.
[0057]
Note that the nut 13 for preventing rotation is formed in such a shape that the gap with the nut 12 for preventing rotation is small and rotation of the nut 12 for preventing rotation is stopped.
[0058]
According to the configuration of the tenth aspect, the fixing portion 10 is integrally formed on the storage case 7 on the side opposite to the joining surface 2a of the segment 2 (for example, integrally formed by casting or the like). Accordingly, the storage case 7 can have a simpler structure, and the storage case 7 can be firmly provided on the segment 2.
[0059]
Forming the fixing portion 10 integrally with the storage case 7 is described as follows. “Only the storage case 7 is attached at the time of forming the segment 2, and after the segment is formed, the storage portion 7 a opened at the joint surface 2 a of the segment 2 is The worm transmission 6 and the joining bolts 4 are attached to the storage case 7. "
[0060]
From these facts, according to the present invention, in order to smooth the inner surface of the segment 2 and to perform retightening after the assembly of the segment 2, even if the joining can be performed using the worm transmission 6, It is possible to provide the joint structure 1 in which the structure of the storage case 7 does not become complicated, power can be smoothly transmitted in the storage case 7, and the joining of the segments 2 can be easily and reliably performed.
[0061]
【The invention's effect】
According to the joint structure of a segment of the present invention, only the storage case is attached when the segment is formed, and after the segment is formed, the worm transmission device and the connection bolt are connected to the storage case using the storage portion opened on the joint surface of the segment. Can be attached.
[0062]
Therefore, when forming the segments, it is not necessary to worry about the intrusion of the poured concrete, and the structure of the storage case for storing the worm transmission does not need to be complicated.
[0063]
Further, since the worm transmission and the joining bolt are attached after the segment is formed, it is possible to reduce the possibility that the power transmission in the storage case cannot be smoothly performed after the worm transmission and the joining bolt are assembled into the segment.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a joint structure of a segment according to the present invention.
FIG. 2 is a schematic cross-sectional view showing a state in which a worm transmission and a joining bolt are attached to a storage case so as to be a male joint used in the joint structure of the present invention.
FIG. 3 is a schematic sectional view showing a worm transmission and a storage case used in the joint structure of the present invention.
4A is an enlarged view of the female joint used in the joint structure of the present invention, taken along the line BB of FIG. 6, and FIG. 4B is a view taken along the line AA of FIG.
FIG. 5 is a schematic sectional view showing a state where the joint structure of the present invention is used for a segment having a high girder height.
FIG. 6 is a schematic perspective view showing a segment using the joint structure of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Joint structure 1, 2 ... Segment, 2a ... Joint surface, 3 ... Male joint, 4 ... Joint bolt, 4a ... Locking part, 4b ... Screw part, 5 ... Female joint, 5a ... Taper, 6 ... Worm transmission Device, 6a: worm wheel, 6b: worm, 6c: convex portion for fixing the shaft, 6d: projecting portion, 7: storage case, 7a: storage portion, 7b: insertion hole, 7c: screw portion, 7d: concave portion for fixing the shaft , 8: Front lid part, 9: Water stopper, 10: Fixing part, 11: Formwork, 12: Nut for preventing rotation, 13: Nut storage part for preventing rotation.

Claims

Locking the engaging portion of the joining bolt of the male joint provided on one segment to be joined to the female joint provided on the other segment to be joined, and moving the joining bolt by a worm transmission. With this, the joint structure is pulled together to bring the two segments into contact with each other and bring the joining surfaces into contact with each other,
The male joint includes the worm transmission device in which a screw portion of the joining bolt is screwed to a worm wheel as a rotation shaft thereof, and a storage case in which a storage portion having an opening in a joining surface of the segment is formed. Equipped,
The joining bolt is provided with a front lid portion between the locking portion and a screw portion screwed to the worm wheel, and the storage portion of the storage case is provided on the joint surface side of the segment. It is configured to be able to close the opening by screwing the front lid,
When the front lid portion is screwed into the storage portion of the storage case, the worm transmission fits in the storage portion, and the joining bolt passes through the front lid portion, and the locking portion is outside the storage portion. A segment joint structure characterized by having the following configuration.

In order to insert a worm that meshes with the worm wheel, an insertion hole formed in the storage case is configured so that a water stopcock can be screwed into the worm insertion side. The joint structure for a segment according to claim 1.

The segment according to claim 2, wherein an inner peripheral surface of the insertion hole, which is a portion where a screw portion with which the water stopper is screwed, is formed with a diameter larger than an outer diameter of the worm. Joint structure.

The insertion end of the worm into the insertion hole is formed with a shaft fixing protrusion for preventing the worm from rotating, and the bottom of the insertion hole is engaged with the shaft fixing protrusion of the worm. The joint structure for a segment according to claim 1 or 2, wherein a shaft fixing concave portion is formed.

The joint structure for a segment according to claim 4, wherein the shaft fixing projection formed at the insertion end of the worm has a hemispherical shape.

On the side surface of the worm wheel, a protruding portion is formed in the vicinity of the joining bolt serving as a rotation axis, and the worm wheel is configured such that the protruding portion faces the storage case or the front lid. The joint structure for a segment according to claim 1, wherein the joint structure is provided.

The engaging portion of the joining bolt of the male joint and the engaging of the female joint are configured to be able to be performed by inserting the engaging portion of the joining bolt into the female joint by sliding the segment, The joint structure for a segment according to claim 1, wherein the insertion side of the locking portion of the female joint is formed with a taper for facilitating insertion.

The engaging portion of the joining bolt of the male joint and the engaging of the female joint are configured to be able to be performed by inserting the engaging portion of the joining bolt into the female joint by sliding the segment, The joint structure for a segment according to claim 1, wherein the engaging portion of the joining bolt is formed by a bolt head having a female joint side formed with a curved surface.

The joining bolt of the male joint is provided with a counter-rotating nut at a tip end of a screw portion screwed to the worm wheel on the opposite side to the locking portion, and is provided in the storage case. Forms a counter-rotation prevention nut storage section that can store the counter-rotation prevention nut at the bottom of the storage section,
When the worm transmission is accommodated in the storage portion and the connecting bolt passes through the front lid portion and the locking portion is outside the storage portion, the nut for preventing rotation is used for preventing the rotation. The joint structure for a segment according to claim 1, wherein the joint structure is configured so as to enter the inside of the nut storage portion and prevent the joint bolt from rotating with the worm wheel.

The joint structure for a segment according to claim 1, wherein the storage case has a fixing portion integrally formed on a side opposite to a joining surface of the segment.