JP3841677B2

JP3841677B2 - Structural joint device

Info

Publication number: JP3841677B2
Application number: JP2001383529A
Authority: JP
Inventors: 哲也中村; 章堀本
Original assignee: Sakura Rubber Co Ltd
Current assignee: Sakura Rubber Co Ltd
Priority date: 2001-12-17
Filing date: 2001-12-17
Publication date: 2006-11-01
Anticipated expiration: 2021-12-17
Also published as: JP2003184188A

Description

【０００１】
【発明の属する技術分野】
本発明は、雌雄の区別のない一対の同一構造の継ぎ手本体からなり、パイプ体もしくは中実体からなる構造体を組立てて、たとえばトラス構造物を構築するのに用いられる継ぎ手装置に関する。
【０００２】
【従来の技術】
たとえば、複層立体トラストとして立体トラス構造物があり、この立体トラス構造物を構成する構造体および、これら構造体を連結固定する継ぎ手装置として、従来は、主に、ボルトが用いられていた。最も一般的には、トラス部材相互を溶接してトラス構造を組立てていた。
【０００３】
また、ボルト継ぎ手としても、ノード部分に垂直にボルトが入るものと、ノード部分からブラケットを突設し、ここに直角ボルトを入れて固定するというものが多く、全て鋼材から構成される。
【０００４】
たとえば、トラス構造物として屋根架構に適用するには、特に、総重量の軽減化や、メンテナンスの作業の簡略化が求められている。そのため、鋼材に代わってアルミニウム合金材や、ステンレス鋼などが用いられるようになった。
【０００５】
しかも近時は、デザイン性に富む屋根架構が好まれていて、上述の素材で構成すると単位面積重量が極めて大になってしまう。そこで、比重が小さく軽量で、しかも剛性の大であるＣＦＲＰを用いることで解決を得ようとしている。
【０００６】
ところが、上記ＣＦＰＲ材では、端部をテーパー状とする必要があり、その加工が面倒であるとともに、ねじ切り部の強度が低いという特徴があって、構造体の全てと、これら構造体を連結固定する継ぎ手装置の全てをＣＦＰＲ材に代えることには無理がある。
【０００７】
当面は、たとえばパイプ状からなるトラス部材の本体部分に、ボルトやブラケットを取付けて、これらのものがノード部分に接合されることが、地上における建築物関係では一般的な設計手法である。
【０００８】
継ぎ手装置の一例（清水建設研究報告ＶＯＬ．６５１９９７．４）を、図４に示す。ここで球状のハブａと、このハブａと接しトラス部材に加わる荷重のうち主として圧縮力を受け持つカラーｂは、アルミニウム合金材が用いられる。上記カラーｂ端面に、ステンレス鋼からなるノーズコーンｃが接するように設けられている。
【０００９】
上記ノーズコーンｃとカラーｂおよびハブａに亘って、主として引張り荷重を受け持つ高張力鋼材からなるベアリングボルトｄが螺挿される。上記ノーズコーンｃの突設端面には、構造体であるＣＦＲＰトラス部材ｆがリベットｅを介して取付固定される。上記リベットｅは、ステンレス鋼材が用いられる。
【００１０】
図４（Ｂ）および図４（Ｃ）に示すように、複数のトラス材が所定方向に取付けられるように構成されたハブａがあって、ＣＦＲＰパイプからなるトラス部材ｆを上記継ぎ手装置を介して連結する。したがって、剛性が高く軽量化を促進した複層立体トラス構造物を構成でき、デザイン性に富む屋根架構等に適用できる。
【００１１】
【発明が解決しようとする課題】
問題は継ぎ手装置の構成であって、上記トラス部材ｆの両端部に継ぎ手装置を取付けるのに、２本のベアリングボルトｄの螺挿作業が必要である。複層立体トラス構造物を構築するためには、大量のトラス部材ｆを継ぎ手装置を介して連結しなければならない。
【００１２】
そのため、継ぎ手装置のベアリングボルトｄに対する膨大な螺挿作業が必要となる。この作業は従来の建設現場で行われてきたトラス構造の組立てに比べれば幾分かの改善はされているが、依然としてトラス構造の組立てに長い時間がかかっていることは事実である。
【００１３】
さらに、ねじを回転させて取付ける作業であるため、その反動トルクをどこかで吸収する必要がある。これは足場の悪い宇宙空間や洋上、あるいは水中や海底などで構造の組立て作業を行おうとする際には著しく不都合な点である。
【００１４】
また、図４に示した従来例では、カラーｂを回転させることにより、ベアリングボルトｄを螺挿するようになっているが、このような構成ではトラスを組立てることはできても、分解することは困難である。
【００１５】
上述の継ぎ手装置では、建築構造におけるトラス部材以外の用途を含めて、いずれの用途においても結合作業では部材の中心軸まわりの反動トルクが発生する虞れがあって、これを打ち消すための特別な工夫や工具が必要である。また、宇宙空間や水中などの特殊状況下で作業する場合には、作業者の体勢保持のために特別な工夫をしなければならず、コスト的に悪影響がある。
【００１６】
本発明は上記事情に着目してなされたものであり、その目的とするところは、雌雄のない一対の継ぎ手本体をワンタッチで結合でき、結合時のストロークが小さくてすみ、組立て時および分解時の反動トルクが非常に小さく、組立てが容易で作業性の大幅な向上を得られ、かつ必要であれば簡単に分解でき、屋根架構のほかに、宇宙構造物あるいは海洋構造物などでも対応でき、広く用途がある構造体の継ぎ手装置を提供しようとするものである。
【００１７】
【課題を解決するための手段】
上記目的を満足するため本発明の構造体の継ぎ手装置は、請求項１として、パイプ体もしくは中実体からなる一対の構造体端部に継ぎ手本体を取付け、継ぎ手本体相互を結合することにより構造体相互の結合をなす継ぎ手装置において、上記継ぎ手本体は、構造体端部に回転自在に嵌め込まれる筒状の内側継ぎ手と、この内側継ぎ手の外周に回転自在に嵌め込まれる筒状の外側継ぎ手と、これら内側継ぎ手と外側継ぎ手のそれぞれ先端部に設けられ周方向に沿って所定間隔を存し軸方向に突出する複数の嵌合突部およびこれら嵌合突部相互間に形成される嵌合凹部と、嵌合突部の一方の側壁に設けられ継ぎ手本体における内側継ぎ手と外側継ぎ手では互いに反対側でかつ継ぎ手本体相互を対向させた状態で外側継ぎ手相互と内側継ぎ手相互では互いに対向する係止鉤部と、各継ぎ手本体における内側継ぎ手と外側継ぎ手との間に設けられ継ぎ手本体の全ての嵌合突部と嵌合凹部を相手側の継ぎ手本体の全ての嵌合凹部と嵌合突部に軸方向に嵌合した状態で内側継ぎ手相互と外側継ぎ手相互を相対する周方向に弾性的に回動付勢し対向する係止鉤部を互いに係止させる付勢機構とを具備したことを特徴とする。
【００１８】
請求項２として、請求項１記載の構造体の継ぎ手装置において継ぎ手本体を互いに結合した状態で、それぞれの継ぎ手本体における外側継ぎ手と内側継ぎ手を互いに連結する連結具を具備したことを特徴とする。
【００１９】
請求項３として、請求項１および請求項２のいずれかに記載の構造体の継ぎ手装置において継ぎ手本体を互いに結合した状態で、それぞれの継ぎ手本体における外側継ぎ手と内側継ぎ手の軸方向の位置を固定する固定具を具備したことを特徴とする。
【００２０】
請求項４として、請求項１ないし請求項３のいずれかに記載の構造体の継ぎ手装置において内側継ぎ手の内部に嵌め込まれ、構造体および継ぎ手本体の中心軸を揃える整位部材を具備したことを特徴とする。
【００２１】
上述の課題を解決する手段を採用することにより、請求項１の発明によれば、組立て時および分解時の反動トルクが非常に小さく、組立てが容易で作業性の大幅な向上を得られ、かつ必要であれば簡単に分解できる。
【００２２】
請求項２の発明によれば、雌雄のない一対の継ぎ手本体をワンタッチで結合でき、結合時のストロークが小さく組立てが容易ですむうえに、連結具によって外側継ぎ手と内側継ぎ手を、互いに連結してガタがない。
【００２３】
請求項３の発明によれば、雌雄のない一対の継ぎ手本体をワンタッチで結合でき、結合時のストロークが小さく組立てが容易ですむうえに、固定具によって外側継ぎ手と内側継ぎ手を、互いに軸方向に連結固定してガタがなく、また構造体としての寸法上の精度が向上する。
【００２４】
請求項４の発明によれば、雌雄のない一対の継ぎ手本体をワンタッチで結合でき、結合時のストロークが小さく組立てが容易ですむうえに、整位具によって構造体および継ぎ手本体の中心軸が揃えられ、さらに高い組立て精度を得る。
【００２５】
【発明の実施の形態】
以下、本発明の実施の形態を図面にもとづいて説明する。
【００２６】
図１は分離したもしくは結合前の継ぎ手装置を示し、図２は継ぎ手装置を構成する継ぎ手本体を一部断面にして示し、図３は継ぎ手本体相互を結合した状態を示している。
【００２７】
この継ぎ手装置は、雌雄のない同一構造の一対の継ぎ手本体１，１を備えている。上記継ぎ手本体１は、内側継ぎ手２および、この内側継ぎ手部２の外周に位置する外側継ぎ手３との二重構造をなす。
【００２８】
上記内側継ぎ手２は、円筒体から形成されていて、構造体としてのトラス部材ｆ端部に回転自在に嵌め込まれている。上記外側継ぎ手３は、図２に示した例ではトラス部材ｆ側の端部外周面がテーパー状をなしているが、全体的に円筒体からなり、その内周面が内側継ぎ手２の外周面に回転自在に嵌り合っている。
【００２９】
さらに詳細に説明すると、トラス部材ｆの端部外周面にねじ部４が設けられていて、ここに内周面にねじ部を有するカラー５が螺装される。このカラー５の外周面はトラス部材ｆの外周面よりも径方向に突出していて、カラー５の外周面に内側継ぎ手２の内周面が回転自在に嵌り合っている。
【００３０】
上記カラー５の突出端に、上記内側継ぎ手２の端部内径に一体に形成される抜け止め用突部２ａが係止して、軸方向の抜け止めをなす。上記外側継ぎ手３のテーパー側端部の内周面にも抜け止め用突部３ａが一体に形成され、内側継ぎ手２の抜け止め用突部２ａ外面に係止して軸方向の抜け止めをなす。
【００３１】
後述するようにして、一対の継ぎ手本体１，１を互いに結合した状態で、互いの継ぎ手本体１における外側継ぎ手３と内側継ぎ手２に連通する部位に孔部６が開口していて、連結具である連結ピン７を挿入するようになっている。
【００３２】
この連結ピン７によって、内側継ぎ手２と外側継ぎ手３は互いに一体に連結固定され、かつトラス部材ｆに対して周方向に一体に回転自在となる。したがって、この連結ピン７は、継ぎ手本体１，１相互が結合した状態でのロック機構として用いられることになる。
【００３３】
さらに、一対の継ぎ手本体１，１を互いに結合した状態で、トラス部材ｆにおける外側継ぎ手３のテーパー側端面に対向する部位に孔部８が開口していて、固定具である楔９を挿入するようになっている。
【００３４】
この楔９は、上端部がトラス部材ｆから突出するように寸法設定されていて、上記外側継ぎ手３の端面に当接し、後述する整位部材１０を押し出すために備えられる。そして、楔９は内、外側継ぎ手２、３が相手側継ぎ手本体１と結合していないときに、トラス部材ｆに沿って移動してしまわないよう規制する。
【００３５】
このようにして、内側継ぎ手２と外側継ぎ手３が相手側の継ぎ手と係合したあとに楔９を挿入して、芯出し用筒体１０をトラス部材ｆから突出する方向に押圧することにより、結合を一層強固なものにすることができる。
【００３６】
上記内側継ぎ手２の内部に、整位部材である芯出し用筒体１０が挿入される。芯出し用筒体１０の外径は段状に形成され、大径部１０ａが内側継ぎ手２内径に、小径部１０ｂがトラス部材ｆ内径に，それぞれ変位自在に嵌め込まれる。また、大径部１０ａ側端面には、一部が大径部１０ａ端面から突出するようにパッキン部材１１が取付けられる。
【００３７】
一対の継ぎ手本体１，１を互いに結合した状態で、芯出し用筒体１０相互がパッキン部材１１を介して当接し、かつ互いのトラス部材ｆと内、外側継ぎ手２，３からなる継ぎ手本体１の中心軸を揃える整位をなす。
【００３８】
なお、芯出し用筒体１０は内側継ぎ手２およびトラス部材ｆに対して変位自在に寸法設定されるので、継ぎ手本体１相互の結合前の状態で少しでもトラス部材ｆを傾むけると、パイプ２と内側継ぎ手２から容易に抜け出てしまう。
【００３９】
そこで、芯出し用筒体１０の小径部１０ｂに溝部１１ａを設け、ここにゴム材からなるＯリング１１ｂを嵌め込む。トラス部材ｆに対するＯリング１１ｂの摩擦力で、少しの傾きでは容易に抜け出ないように規制する。
【００４０】
上記内側継ぎ手２と、上記外側継ぎ手３のそれぞれ先端には、周方向に沿って所定間隔を存し軸方向に突出する複数の嵌合突部１２が設けられ、これら嵌合突部１２相互間には嵌合凹部１３が形成される。
【００４１】
上記継ぎ手本体１，１相互が軸方向に結合された状態で、一方の内側継ぎ手２の嵌合突部１２が他方の内側継ぎ手２の嵌合凹部１３に嵌合し、他方の内側継ぎ手２の嵌合突部１２が一方の内側継ぎ手２の嵌合凹部１３に嵌合して、互いに相補形に嵌合する。
【００４２】
同時に、一方の外側継ぎ手３の嵌合突部１２が他方の外側継ぎ手３の嵌合凹部１３に嵌合し、他方の外側継ぎ手３の嵌合突部１２が一方の外側継ぎ手３の嵌合凹部１２に嵌合して、互いに相補形に嵌合する。
【００４３】
なお、ここでは嵌合凹部１３の幅寸法が嵌合突部１２の幅寸法よりもある程度広く形成されていて、嵌合突部１２が嵌合凹部１３に嵌合した状態で、各内，外側継ぎ手部２，３は周方向に所定量だけ回動自在である。
【００４４】
いずれの嵌合突部１２においても、一方の側壁には、周方向に突出する係止鉤部１４が一体に設けられる。各継ぎ手本体１において、内側継ぎ手２と外側継ぎ手３のそれぞれ係止鉤部１４は、嵌合突部１２の互いに反対側の側壁に設けられている。
【００４５】
図１に示すように、一対の継ぎ手本体１，１を軸方向に対向させた状態で、互いの内側継ぎ手２において係止鉤部１４が嵌合突部１２の対向する側壁に設けられ、かつ互いの外側継ぎ手３において係止鉤部１４が嵌合突部１２の対向する側壁に設けられる。
【００４６】
したがって、この状態のまま、いずれか一方の継ぎ手本体１を移動して互いの嵌合突部１２を嵌合凹部１３に嵌合することにより、対向する係止鉤部１４相互が係合可能となる。
【００４７】
上記係止鉤部１４の係止面は、周方向に対して所定の角度だけオーバーハング状に傾斜しており、これらが係合した状態で継ぎ手本体１，１相互を引き離す方向の荷重が作用した場合に、係止鉤部１４相互はより強く係合し、内側継ぎ手２相互および外側継ぎ手３相互の抜けを確実に防止するように構成される。
【００４８】
上記係止鉤部１４相互が係合した状態では、嵌合突部１２の先端面と嵌合凹部１３の奥壁面との間に隙間を存していて、嵌合突部１２と嵌合凹部１３とがさらに軸方向に互いに進入するように移動可能である。
【００４９】
各外側継ぎ手３の外周面に露出して付勢機構１５が設けられる。この付勢機構１５は、外側継ぎ手３に周方向に設けられる長孔１６と、この長孔１６に挿入され内側継ぎ手２の周面に植設される止めピン１７と、長孔１６端部に近接する外側継ぎ手３周面部位に設けられる受けピン１８と、この受けピン１８と止めピン１７との間に亘って設けられる引張りばね１９とから構成される。
【００５０】
すなわち、上記付勢機構１５は内側継ぎ手２と外側継ぎ手３との間に設けられていて、内側継ぎ手２と外側継ぎ手３を互いに逆の周方向に回動するよう弾性的に引張り付勢する。
【００５１】
各継ぎ手本体１，１において、内，外側継ぎ手２，３に設けられる係止鉤部１４が互いに逆の側壁に設けられることに対応して、付勢機構１５を構成する止めピン１７と受けピン１８は互いに周方向の逆位置に設けられている。
【００５２】
いずれにしても、それぞれの継ぎ手本体１，１における上記付勢機構１５の付勢方向は、内側継ぎ手２と外側継ぎ手３の係止鉤部１４が互いに近接する方向である。
【００５３】
継ぎ手本体１，１相互を結合するには、一方の継ぎ手本体１における内，外側継ぎ手２，３の嵌合突部１２に対して、他方の継ぎ手本体１における内，外側継ぎ手２，３の嵌合凹部１３を正対させる。
【００５４】
必然的に、一方の継ぎ手本体１における内，外側継ぎ手２，３の嵌合凹部１３に対して、他方の継ぎ手本体１における内，外側継ぎ手２，３の嵌合突部１２が正対する。
【００５５】
そのままの姿勢を保持して、少なくとも一方の継ぎ手本体１を軸方向に移動すればよい。継ぎ手本体１，１相互の全ての嵌合凹部１３内に全ての嵌合突部１２が挿入され、かつ付勢機構１５の弾性付勢作用によって対向する係止鉤部１４相互が係合する。
【００５６】
継ぎ手本体１，１相互がワンタッチ結合されることになり、パイプ２，２相互の結合がなされる。ついで、連結ピン７を挿入して、それぞれの継ぎ手本体１の内，外側継ぎ手２，３を互いに連結し、楔９を挿入して継ぎ手本体１の軸方向のガタを無くす。
【００５７】
なお、楔９を用いることにより強固な結合が得られる一方で、継ぎ手装置全体を含めたトラス部材ｆに付加される圧縮荷重が芯出し用筒体１０に伝わり、楔９を介して連結されたトラス部材ｆに直接的に伝えられてしまう。そのため、圧縮荷重が極端に大きい場合には、楔９の存在がかえって不都合となり易い。
【００５８】
また、トラス構造体は、多数の部材が組み合わされて構造物を構成するため、それぞれの部材に誤差が存在すると、部材を結合し組立てた状態で大きな誤差になってしまう。そのため、継ぎ手装置においても設計通りの仕上がりが必要であり、ガタの発生は好ましくはない。
【００５９】
そこで、楔９を使用すると芯出し用筒体１０の先端にあるパッキン部材１１が全て圧潰状態となり、金属材からなる芯出し用筒体１０が、結合相手の金属材からなる芯出し用筒体１０に接触し、かつ内、外継ぎ手２，３のガタを吸収するだけのストロークの押し出しができるように、楔９の形状を設定する。
【００６０】
このようにして楔９を用いることにより、内、外継ぎ手２，３が結合相手側の内、外継ぎ手２，３（すなわち、継ぎ手本体１，１相互）に軸方向のガタが生じることなく結合でき、トラス部材ｆの組み立て時の寸法精度を確保する。
【００６１】
また、トラス部材ｆに付加される圧縮荷重を、楔９のみに頼ることなく、効率よく均等にトラス部材ｆに伝え、かつ強固な結合を得るために、楔９を挿入することによって生じる芯出し用筒体１０とトラス部材ｆの先端部との間の空間に、適宜な構造用接着剤（例：Ｖａｎｔｉｃｏ社（旧称チバガイギー社）のアラルダイトなど）を流し込んで固形化してもよい。
【００６２】
このような接着剤を流し込むために、継ぎ手本体１，１相互を結合した状態で、内、外側継ぎ手２，３のそれぞれ外周面と内周面を貫通し、互いに連通する位置に、接着剤流し込み用孔２０が設けられる。
【００６３】
また、上記連結ピン７は円柱状であってもよく、テーパー状にしてもよい。この連結ピン７は、継ぎ手本体１の内外側継ぎ手２，３の相対的な動きを固定するため、結合された状態の継ぎ手本体１，１双方に連結ピン７、７を挿入すると、継ぎ手の結合の外れを防止するロック機構としての役割を果たす。
【００６４】
なお、連結ピン７を先細りのテーパ状にし、内側継ぎ手２の孔部６の直径を小さく、外側継ぎ手３の孔部６の直径をこれより大きく形成してもよい。この場合、組み立てた状態で内外側継ぎ手２，３の位置が多少ずれていても、連結ピン７の各孔部６への挿入にともなって内外継ぎ手２，３の位置が矯正される。
【００６５】
継ぎ手本体１内部においては、芯出し用筒体１０相互のパッキン材１１が当接してシールをなし、芯出し用筒体１０自体は内側継ぎ手２および外側継ぎ手３の中心軸を揃える。すなわち、結合される継ぎ手本体１，１相互の中心軸が揃えられ、結合されるトラス部材ｆ，ｆの中心軸が揃えられる。
【００６６】
このようにして組立てられるパイプ状トラス部材（構造体）ｆ，ｆの継ぎ手装置であって、継ぎ手本体１，１相互に雌雄の区別がなく、製作手間が少なくてよいとともに、トラス部材ｆへの取付けに神経を使わずにすむ。
【００６７】
そして、トラス部材ｆ，ｆ相互の結合と分離時において、継ぎ手本体１に対する軸方向のストロークが短く、ワンタッチの結合と分離ができて、作業性の大幅な向上が得られる。
【００６８】
内側継ぎ手２と外側継ぎ手３の二重構造である継ぎ手本体１を結合するので、継ぎ手本体１，１相互を結合した状態での強度が増大し、安全性と信頼性の向上化を図れる。
【００６９】
結合される継ぎ手本体１，１相互において、内側継ぎ手２の係止鉤部１４と外側継ぎ手３の係止鉤部１４の突出方向が互いに逆であり、かつ付勢機構１５が係止鉤部１４，１４相互を係合する方向に弾性的に付勢するので、継ぎ手本体１，１相互は、より強固に係合し、衝撃などに対して何らの影響も受けない。
【００７０】
結合した継ぎ手本体１，１に対して正逆いずれの回転方向のトルクがかかっても、あるいは軸方向のねじりモーメントや、軸方向に沿う引張り力もしくは圧縮力がかかっても、上述の継ぎ手本体１の構成から、内側継ぎ手２，２相互と、外側継ぎ手３，３相互が外れることがない。
【００７１】
互いの継ぎ手本体１，１を結合した状態で、芯出し筒体１０の端部に設けたパッキン材１１，１１相互が密接して内部をシールし、芯出し用筒体小径部１０ｂに嵌め込んだＯリング１１ｂがシールするので、パイプとしてのトラス部材ｆ内に流体を流通させることも可能である。
【００７２】
必要に応じて、継ぎ手本体１，１相互を分解（分離）する場合は、連結ピン７や楔９を取外ししたうえで、いずれか一方の継ぎ手本体１に設けられる付勢機構１５を操作すればよい。
【００７３】
すなわち、一方の手で外側継ぎ手３を固定し回り止めし、他方の手で付勢機構１５を構成する止めピン１７を引張りばね１９の付勢方向とは逆方向に回動して、引張りばね１９を伸長させる。
【００７４】
付勢機構１５の付勢力に抗して内側継ぎ手２を逆方向に回動することとなり、それまで係合状態にあった係止鉤部１４，１４相互が離反する方向に位置ズレする。係止鉤部１４が設けられていない側壁相互が密接したところで、係止鉤部１４，１４相互が完全に離反する。
【００７５】
継ぎ手本体１，１相互の内側継ぎ手２相互と外側継ぎ手３相互の結合状態が同時に解除されることとなり、それぞれの継ぎ手本体１，１は互いに自由になり、分解できる。
【００７６】
このようにして、継ぎ手本体１，１相互の結合時と分離時に、従来のようにトルクをかけたり、ねじ込む作業が全く不要となり、ワンタッチで着脱が行える。そのため、宇宙構造物や海洋構造物の構築など、足場の悪い条件下でも容易に作業でき、作業性の大幅な向上が得られる。
【００７７】
あるいは、トラス構造物に適用するばかりでなく、構造体ｆをパイプとし、内部にハーネス類やコネクタ類を収容することもできる。さらに、義手や義足などの義肢体用具などに使用しても上述の好条件を確保でき、使用範囲が一挙に拡大する。
【００７８】
継ぎ手本体１，１相互を結合したあと分離することのない場合は、必要に応じて、外側継ぎ手３，３相互の嵌合突部１２と嵌合凹部１３間の隙間を溶接などの手段で埋め込んだり、構造用接着剤（たとえば、Ｖａｎｔｉｃｏ社（旧チバガイギー社）のアラルダイトのようなエポキシ系接着剤）などの強固な樹脂を流し込んで固めることによってこの隙間を埋めることでもよい。継ぎ手装置のより堅牢化が図れて、半永久的な使用に耐えられる。
【００７９】
【発明の効果】
以上説明したように本発明によれば、雌雄のない一対の継ぎ手本体をワンタッチで結合でき、結合時のストロークが小さくてすみ組立てが容易で作業性の大幅な向上を得られるなどの効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施の形態の、分離した状態の継ぎ手装置の斜視図。
【図２】同実施の形態の、継ぎ手装置を構成する継ぎ手本体の一部断面図。
【図３】同実施の形態の、継ぎ手本体相互を結合して継ぎ手装置を構成した状態の正面図。
【図４】従来の継ぎ手装置の一部断面図と、トラス構造物の一部を示す図。
【符号の説明】
ｆ…パイプ体（構造体）、
１…継ぎ手本体、
２…内側継ぎ手、
３…外側継ぎ手、
１２…嵌合突部、
１３…嵌合凹部、
１４…係止鉤部、
１５…付勢機構、
７…連結ピン（連結具）、
９…楔（固定具）、
１０…芯出し用筒体（整位部材）。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint device which is composed of a pair of joint bodies having the same structure without distinction between males and females, and is used for assembling a pipe body or a solid body structure, for example, to construct a truss structure.
[0002]
[Prior art]
For example, there is a three-dimensional truss structure as a multi-layer three-dimensional trust, and conventionally, bolts are mainly used as a structure constituting the three-dimensional truss structure and a joint device for connecting and fixing these structures. Most commonly, the truss members are welded together to assemble the truss structure.
[0003]
Also, there are many bolt joints in which a bolt enters the node portion perpendicularly, and a bracket protrudes from the node portion, and a right-angle bolt is inserted and fixed here, and all are made of steel.
[0004]
For example, to apply to a roof frame as a truss structure, in particular, reduction of total weight and simplification of maintenance work are required. For this reason, aluminum alloy materials and stainless steel have been used in place of steel materials.
[0005]
Moreover, recently, a roof frame rich in design is preferred, and if it is made of the above-mentioned materials, the unit area weight becomes extremely large. Therefore, a solution is being sought by using CFRP having a small specific gravity and light weight and high rigidity.
[0006]
However, in the CFPR material, it is necessary to make the end tapered, and the processing is troublesome and the strength of the threaded portion is low. All the structures and these structures are connected and fixed. It is impossible to replace all of the joint devices to be replaced with CFPR material.
[0007]
For the time being, it is a general design technique in relation to buildings on the ground that bolts and brackets are attached to the body portion of a truss member made of, for example, a pipe and these are joined to the node portion.
[0008]
An example of the joint device (Shimizu Construction Research Report VOL.65 19977.4) is shown in FIG. Here, an aluminum alloy material is used for the spherical hub “a” and the collar “b” which mainly contacts the hub “a” and bears a compressive force among the loads applied to the truss member. A nose cone c made of stainless steel is provided in contact with the end face of the collar b.
[0009]
A bearing bolt d made of a high-tensile steel material mainly responsible for a tensile load is screwed over the nose cone c, the collar b, and the hub a. A CFRP truss member f, which is a structure, is attached and fixed to the protruding end face of the nose cone c via a rivet e. The rivet e is made of stainless steel.
[0010]
As shown in FIGS. 4B and 4C, there is a hub a configured such that a plurality of truss members can be attached in a predetermined direction, and a truss member f made of a CFRP pipe is passed through the joint device. Connect. Therefore, it is possible to construct a multi-layer three-dimensional truss structure that has high rigidity and promotes weight reduction, and can be applied to a roof frame or the like that is rich in design.
[0011]
[Problems to be solved by the invention]
The problem is the construction of the joint device, and it is necessary to screw the two bearing bolts d in order to attach the joint device to both ends of the truss member f. In order to construct a multilayer three-dimensional truss structure, a large number of truss members f must be connected via a joint device.
[0012]
Therefore, enormous screwing work for the bearing bolt d of the joint device is required. Although this work is somewhat improved compared to the assembly of the truss structure that has been performed at the conventional construction site, it is true that the assembly of the truss structure still takes a long time.
[0013]
Furthermore, since it is the work of rotating and mounting the screw, it is necessary to absorb the reaction torque somewhere. This is a serious disadvantage when trying to assemble structures in outer space with poor scaffolding, offshore, underwater or underwater.
[0014]
Further, in the conventional example shown in FIG. 4, the bearing bolt d is screwed by rotating the collar b. In such a configuration, the truss can be assembled but disassembled. It is difficult.
[0015]
In the above-mentioned joint device, there is a possibility that a reaction torque around the central axis of the member may be generated in the coupling work in any application including applications other than the truss member in the building structure. Ingenuity and tools are required. In addition, when working under special circumstances such as outer space or underwater, special measures must be taken to maintain the posture of the worker, which has an adverse effect on cost.
[0016]
The present invention has been made paying attention to the above circumstances, and the purpose of the present invention is to connect a pair of joint bodies without male and female with one touch, and the stroke at the time of coupling is small, and at the time of assembly and disassembly The reaction torque is very small, it is easy to assemble, can greatly improve workability, and can be easily disassembled if necessary, and can be used for space structures or marine structures in addition to roof frames. The present invention intends to provide a joint device for a structure having a use.
[0017]
[Means for Solving the Problems]
In order to satisfy the above-mentioned object, according to a first aspect of the present invention, there is provided a joint device for a structure according to claim 1, wherein the joint body is attached to the ends of a pair of structures consisting of a pipe body or solid body, and the joint bodies are coupled to each other. In the joint device for mutual coupling, the joint body includes a cylindrical inner joint that is rotatably fitted to the end of the structure, a cylindrical outer joint that is rotatably fitted to the outer periphery of the inner joint, and A plurality of fitting protrusions that are provided at the respective distal ends of the inner joint and the outer joint and project in the axial direction at predetermined intervals along the circumferential direction, and fitting recesses formed between the fitting protrusions; Provided on one side wall of the fitting protrusion, the inner joint and the outer joint of the joint body are opposite to each other and the joint body is opposed to each other. Locking flanges facing each other, all fitting protrusions and fitting recesses of the joint body provided between the inner joint and the outer joint in each joint body, and all fitting recesses of the mating joint body An urging mechanism that elastically urges the inner joint and the outer joint to rotate in the circumferential direction opposite to each other while the fitting protrusions are axially fitted to each other and locks the opposing locking collars to each other; It is characterized by having.
[0018]
According to a second aspect of the present invention, in the joint device for a structure according to the first aspect of the present invention, the coupling main body is coupled to each other, and a coupling tool for coupling the outer joint and the inner joint of each joint main body is provided.
[0019]
As a third aspect, in the joint device for a structure according to any one of the first and second aspects, the axial positions of the outer joint and the inner joint in each joint body are fixed in a state where the joint bodies are coupled to each other. It is characterized by having a fixing tool.
[0020]
As a fourth aspect of the present invention, in the joint device for a structure according to any one of the first to third aspects, a positioning member fitted into the inner joint and aligning the central axes of the structure and the joint body is provided. Features.
[0021]
By adopting the means for solving the above-mentioned problems, according to the invention of claim 1, the reaction torque at the time of assembly and disassembly is very small, the assembly is easy and the workability can be greatly improved, and It can be easily disassembled if necessary.
[0022]
According to the second aspect of the present invention, a pair of joint bodies without males and females can be coupled with one touch, the stroke at the time of coupling is small and assembly is easy, and the outer joint and the inner joint are coupled to each other by a coupling tool. There is no backlash.
[0023]
According to the invention of claim 3, a pair of joint bodies having no male and female can be coupled with one touch, the stroke at the time of coupling is small and assembly is easy, and the outer joint and the inner joint are axially connected to each other by a fixture. There is no play when connected and fixed, and the dimensional accuracy of the structure is improved.
[0024]
According to the invention of claim 4, a pair of joint bodies without males and females can be coupled with one touch, the stroke at the time of coupling is small and assembly is easy, and the center axis of the structure and the joint body is aligned by the positioning tool. Higher assembly accuracy.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 shows a joint device that is separated or not joined, FIG. 2 shows a joint body constituting the joint device in a partial cross section, and FIG. 3 shows a state in which joint bodies are joined together.
[0027]
This joint device is provided with a pair of joint bodies 1 and 1 having the same structure without sex. The joint body 1 has a double structure including an inner joint 2 and an outer joint 3 located on the outer periphery of the inner joint portion 2.
[0028]
The inner joint 2 is formed of a cylindrical body and is rotatably fitted to an end portion of a truss member f as a structure. In the example shown in FIG. 2, the outer joint 3 has a tapered outer peripheral surface on the truss member f side. The outer joint 3 is entirely formed of a cylindrical body, and its inner peripheral surface is the outer peripheral surface of the inner joint 2. It fits in a freely rotating manner.
[0029]
More specifically, the thread portion 4 is provided on the outer peripheral surface of the end portion of the truss member f, and the collar 5 having the screw portion on the inner peripheral surface is screwed therein. The outer peripheral surface of the collar 5 protrudes in the radial direction from the outer peripheral surface of the truss member f, and the inner peripheral surface of the inner joint 2 is rotatably fitted to the outer peripheral surface of the collar 5.
[0030]
The protruding end of the collar 5 is locked with a retaining projection 2a formed integrally with the inner diameter of the end of the inner joint 2 to prevent the collar 5 from coming off. The protrusion 3a for preventing the locking is integrally formed on the inner peripheral surface of the taper side end of the outer joint 3 and is locked to the outer surface of the protrusion 2a for preventing the locking of the inner joint 2 to prevent the locking in the axial direction. .
[0031]
As will be described later, in a state where the pair of joint bodies 1 and 1 are coupled to each other, a hole portion 6 is opened at a portion communicating with the outer joint 3 and the inner joint 2 in each joint body 1, A certain connecting pin 7 is inserted.
[0032]
By this connecting pin 7, the inner joint 2 and the outer joint 3 are connected and fixed integrally with each other, and can be rotated integrally with the truss member f in the circumferential direction. Therefore, the connecting pin 7 is used as a locking mechanism in a state where the joint bodies 1 and 1 are coupled to each other.
[0033]
Further, in a state where the pair of joint bodies 1 and 1 are coupled to each other, a hole 8 is opened at a portion of the truss member f facing the tapered end surface of the outer joint 3, and a wedge 9 as a fixing tool is inserted. It is like that.
[0034]
The wedge 9 is dimensioned so that its upper end protrudes from the truss member f, and comes in contact with the end face of the outer joint 3 to push out a positioning member 10 described later. The wedge 9 restricts the inner and outer joints 2 and 3 from moving along the truss member f when the inner and outer joints 2 and 3 are not coupled to the mating joint body 1.
[0035]
In this way, by inserting the wedge 9 after the inner joint 2 and the outer joint 3 are engaged with the mating joint, and pressing the centering cylinder 10 in the direction protruding from the truss member f, Bonds can be made even stronger.
[0036]
A centering cylinder 10 as a positioning member is inserted into the inner joint 2. The outer diameter of the centering cylinder 10 is formed in a step shape, and the large diameter portion 10a is fitted into the inner joint 2 inner diameter and the small diameter portion 10b is fitted into the inner diameter of the truss member f so as to be displaceable. Further, the packing member 11 is attached to the end surface on the large diameter portion 10a side so that a part thereof protrudes from the end surface of the large diameter portion 10a.
[0037]
In a state where the pair of joint main bodies 1 and 1 are coupled to each other, the centering cylinders 10 are in contact with each other via the packing member 11, and the joint main body 1 including the mutual truss member f and the inner and outer joints 2 and 3 is provided. Align the center axis of the.
[0038]
Since the centering cylinder 10 is dimensioned so as to be displaceable with respect to the inner joint 2 and the truss member f, if the truss member f is tilted even a little before the coupling main bodies 1 are connected to each other, the pipe 2 And easily escape from the inner joint 2.
[0039]
Therefore, a groove 11a is provided in the small diameter portion 10b of the centering cylinder 10, and an O-ring 11b made of a rubber material is fitted therein. The frictional force of the O-ring 11b against the truss member f is controlled so that it does not easily come out with a slight inclination.
[0040]
A plurality of fitting protrusions 12 projecting in the axial direction at predetermined intervals along the circumferential direction are provided at the tips of the inner joint 2 and the outer joint 3, respectively. Is formed with a fitting recess 13.
[0041]
In a state where the joint bodies 1, 1 are coupled to each other in the axial direction, the fitting protrusion 12 of one inner joint 2 is fitted into the fitting recess 13 of the other inner joint 2, and the other inner joint 2 The fitting protrusions 12 are fitted into the fitting recesses 13 of the one inner joint 2 and are fitted in a complementary manner.
[0042]
At the same time, the fitting projection 12 of one outer joint 3 is fitted into the fitting recess 13 of the other outer joint 3, and the fitting projection 12 of the other outer joint 3 is fitted into the fitting recess 13 of the one outer joint 3. 12 are fitted to each other in a complementary manner.
[0043]
Here, the width dimension of the fitting recess 13 is formed to be somewhat larger than the width dimension of the fitting projection 12, and the inner and outer sides are in a state in which the fitting projection 12 is fitted in the fitting recess 13. The joint portions 2 and 3 are rotatable by a predetermined amount in the circumferential direction.
[0044]
In any of the fitting protrusions 12, a locking collar part 14 protruding in the circumferential direction is integrally provided on one side wall. In each joint body 1, the locking collar portions 14 of the inner joint 2 and the outer joint 3 are provided on the opposite side walls of the fitting protrusion 12.
[0045]
As shown in FIG. 1, with the pair of joint bodies 1, 1 facing each other in the axial direction, a locking collar 14 is provided on the opposite side wall of the fitting projection 12 in the inner joint 2, and In the outer joints 3 of each other, the locking collar 14 is provided on the opposite side wall of the fitting projection 12.
[0046]
Accordingly, in this state, by moving one of the joint main bodies 1 and fitting the fitting protrusions 12 into the fitting recesses 13, the opposing locking collars 14 can be engaged with each other. Become.
[0047]
The locking surface of the locking collar portion 14 is inclined in an overhang shape by a predetermined angle with respect to the circumferential direction, and a load in a direction that separates the joint main bodies 1 and 1 is applied in a state where they are engaged. In this case, the locking collars 14 are more strongly engaged with each other, and are configured to reliably prevent the inner joint 2 and the outer joint 3 from coming off.
[0048]
In the state in which the locking collars 14 are engaged with each other, there is a gap between the front end surface of the fitting projection 12 and the inner wall surface of the fitting recess 13, and the fitting projection 12 and the fitting recess 13 are further movable so as to enter each other in the axial direction.
[0049]
An urging mechanism 15 is provided so as to be exposed on the outer peripheral surface of each outer joint 3. The urging mechanism 15 includes a long hole 16 provided in the outer joint 3 in the circumferential direction, a stop pin 17 inserted into the long hole 16 and implanted on the peripheral surface of the inner joint 2, and an end of the long hole 16. The receiving pin 18 is provided on the peripheral surface portion of the adjacent outer joint 3 and the tension spring 19 is provided between the receiving pin 18 and the set pin 17.
[0050]
That is, the urging mechanism 15 is provided between the inner joint 2 and the outer joint 3 and elastically pulls and urges the inner joint 2 and the outer joint 3 to rotate in opposite circumferential directions.
[0051]
In each joint body 1, 1, a locking pin 17 and a receiving pin constituting the urging mechanism 15 corresponding to the fact that the locking collars 14 provided on the inner and outer couplings 2, 3 are provided on opposite side walls. 18 are provided at opposite positions in the circumferential direction.
[0052]
In any case, the urging direction of the urging mechanism 15 in each joint body 1, 1 is a direction in which the locking collar portions 14 of the inner joint 2 and the outer joint 3 are close to each other.
[0053]
In order to connect the joint bodies 1, 1 to each other, the inner and outer joints 2, 3 in the other joint body 1 are fitted to the fitting protrusions 12 of the inner and outer joints 2, 3 in one joint body 1. The concavity 13 is directly opposed.
[0054]
Inevitably, the fitting protrusions 12 of the inner and outer joints 2 and 3 of the other joint body 1 face the fitting recesses 13 of the inner and outer joints 2 and 3 of one joint body 1.
[0055]
What is necessary is just to move at least one joint main body 1 to an axial direction, hold | maintaining an attitude | position as it is. All the fitting protrusions 12 are inserted into all the fitting recesses 13 of the joint bodies 1, 1, and the opposing locking collars 14 are engaged with each other by the elastic biasing action of the biasing mechanism 15.
[0056]
The joint bodies 1 and 1 are connected to each other by one touch, and the pipes 2 and 2 are connected to each other. Next, the connecting pin 7 is inserted to connect the inner and outer joints 2 and 3 of each joint body 1 to each other, and the wedge 9 is inserted to eliminate the axial play of the joint body 1.
[0057]
In addition, while using the wedge 9, a strong connection can be obtained, while a compressive load applied to the truss member f including the entire joint device is transmitted to the centering cylinder 10 and connected via the wedge 9. It is directly transmitted to the truss member f. Therefore, when the compressive load is extremely large, the presence of the wedge 9 tends to be inconvenient.
[0058]
In addition, since the truss structure is configured by combining a large number of members, if there is an error in each member, a large error will occur when the members are combined and assembled. For this reason, the joint device also needs to be finished as designed, and play is not preferable.
[0059]
Therefore, when the wedge 9 is used, the packing member 11 at the tip of the centering cylinder 10 is all in a crushed state, and the centering cylinder 10 made of a metal material is a centering cylinder made of a metal material to be joined. The shape of the wedge 9 is set so that the stroke can be pushed out so as to contact 10 and absorb the backlash of the inner and outer joints 2 and 3.
[0060]
By using the wedge 9 in this way, the inner and outer joints 2 and 3 are coupled without any axial backlash between the inner and outer joints 2 and 3 (that is, the joint bodies 1 and 1). It is possible to ensure the dimensional accuracy when the truss member f is assembled.
[0061]
Further, the centering caused by inserting the wedge 9 in order to transmit the compressive load applied to the truss member f to the truss member f efficiently and evenly without relying only on the wedge 9 and to obtain a strong bond. An appropriate structural adhesive (eg, Araldite from Vantico (formerly Ciba Geigy)) may be poured into the space between the cylinder 10 for use and the tip of the truss member f to be solidified.
[0062]
In order to pour such an adhesive, in a state where the joint bodies 1 and 1 are coupled to each other, the adhesive pours into positions where the inner and outer joints 2 and 3 pass through the outer peripheral surface and the inner peripheral surface and communicate with each other. A service hole 20 is provided.
[0063]
Further, the connecting pin 7 may be cylindrical or tapered. In order to fix the relative movement of the inner and outer joints 2 and 3 of the joint body 1, the connection pin 7 is connected to the joint body 7 by inserting the connection pins 7 and 7 into both the joint bodies 1 and 1 in the joined state. It plays a role as a lock mechanism that prevents disengagement.
[0064]
Alternatively, the connecting pin 7 may be tapered to form a diameter of the hole 6 of the inner joint 2 and a diameter of the hole 6 of the outer joint 3 larger than this. In this case, even if the positions of the inner and outer joints 2 and 3 are slightly shifted in the assembled state, the positions of the inner and outer joints 2 and 3 are corrected as the connecting pins 7 are inserted into the respective holes 6.
[0065]
Inside the joint body 1, the packing material 11 between the centering cylinders 10 abuts to form a seal, and the centering cylinder 10 itself aligns the central axes of the inner joint 2 and the outer joint 3. That is, the center axes of the joint bodies 1 and 1 to be coupled are aligned, and the center axes of the truss members f and f to be coupled are aligned.
[0066]
The joint device for the pipe-shaped truss members (structures) f, f assembled in this way, the joint bodies 1, 1 do not distinguish between males and females, can be manufactured with less labor, and can be applied to the truss member f. No need to use nerves for installation.
[0067]
When the truss members f and f are coupled and separated from each other, the axial stroke with respect to the joint body 1 is short, and one-touch coupling and separation can be performed, so that workability can be greatly improved.
[0068]
Since the joint body 1 which is a double structure of the inner joint 2 and the outer joint 3 is coupled, the strength in a state in which the joint bodies 1 and 1 are coupled to each other increases, and safety and reliability can be improved.
[0069]
In the joint bodies 1 and 1 to be coupled to each other, the protruding directions of the locking hook 14 of the inner joint 2 and the locking hook 14 of the outer joint 3 are opposite to each other, and the biasing mechanism 15 is the locking hook 14. , 14 are elastically biased in the direction in which they are engaged with each other, so that the joint bodies 1 and 1 are more firmly engaged with each other and are not affected by impact or the like.
[0070]
Even if a forward or reverse torque is applied to the joint body 1 or 1 that is coupled, an axial torsional moment, or a tensile or compressive force along the axial direction is applied. Therefore, the inner joints 2 and 2 and the outer joints 3 and 3 are not separated from each other.
[0071]
In a state where the joint main bodies 1 and 1 are coupled, the packing materials 11 and 11 provided at the end of the centering cylinder 10 are closely contacted to seal the inside, and are fitted into the centering cylinder small diameter part 10b. Since the O-ring 11b seals, it is possible to circulate the fluid in the truss member f as a pipe.
[0072]
If necessary, when disassembling (separating) the joint bodies 1 and 1, after removing the connecting pin 7 and the wedge 9, the biasing mechanism 15 provided on one of the joint bodies 1 is operated. Good.
[0073]
That is, the outer joint 3 is fixed and locked with one hand, and the locking pin 17 constituting the biasing mechanism 15 is rotated with the other hand in a direction opposite to the biasing direction of the tension spring 19 to thereby pull the tension spring. 19 is extended.
[0074]
The inner joint 2 is rotated in the reverse direction against the urging force of the urging mechanism 15, and the locking collar portions 14 and 14 that have been engaged so far are displaced in the direction away from each other. When the side walls not provided with the locking hooks 14 are in close contact with each other, the locking hooks 14 and 14 are completely separated from each other.
[0075]
The joint state between the inner joint 2 and the outer joint 3 between the joint bodies 1 and 1 is released at the same time, so that the joint bodies 1 and 1 are free from each other and can be disassembled.
[0076]
In this way, when coupling and separating the joint bodies 1 and 1, the operation of applying torque or screwing as in the prior art becomes completely unnecessary, and attachment / detachment can be performed with one touch. For this reason, it is possible to easily work even under poor conditions such as the construction of space structures and offshore structures, and the workability can be greatly improved.
[0077]
Alternatively, not only can it be applied to a truss structure, but the structure f can be a pipe, and harnesses and connectors can be accommodated therein. Furthermore, the above-mentioned favorable conditions can be ensured even when used for prosthetic limbs such as a prosthetic hand and a prosthetic leg, and the range of use is expanded at once.
[0078]
In the case where the joint bodies 1 and 1 are not separated from each other, the gap between the fitting projection 12 and the fitting recess 13 between the outer joints 3 and 3 is embedded by means such as welding as necessary. Alternatively, the gap may be filled by pouring and hardening a strong resin such as a structural adhesive (for example, an epoxy adhesive such as Araldite from Vantico (formerly Ciba Geigy)). The joint device can be made more robust and can withstand semi-permanent use.
[0079]
【The invention's effect】
As described above, according to the present invention, a pair of joint bodies having no male and female can be coupled with one touch, and the stroke at the time of coupling is small, so that the assembly is easy and the workability can be greatly improved. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a joint device in a separated state according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a joint body constituting the joint device according to the embodiment.
FIG. 3 is a front view of the joint device according to the embodiment in a state where the joint bodies are coupled to each other to form a joint device;
FIG. 4 is a partial cross-sectional view of a conventional joint device and a view showing a part of a truss structure.
[Explanation of symbols]
f ... Pipe body (structure),
1 ... Fitting body,
2 ... Inner joint,
3 ... Outer joint,
12 ... fitting protrusion,
13 ... fitting recess,
14: Locking collar,
15 ... biasing mechanism,
7: Connecting pin (connector),
9 ... Wedge (fixing tool),
10 ... Centering cylinder (alignment member).

Claims

In a joint device in which a joint body is attached to the ends of a pair of structures consisting of a pipe body or solid body, and the joint bodies are joined together by joining the joint bodies, the joint body is
A cylindrical inner joint that is rotatably fitted to the end of the structure;
A cylindrical outer joint that is rotatably fitted to the outer periphery of the inner joint;
A plurality of fitting protrusions that are provided at the respective distal ends of the inner and outer joints and project in the axial direction with a predetermined interval along the circumferential direction, and a fitting formed between the fitting protrusions A recess,
Provided on one side wall of the fitting protrusion, the inner joint and the outer joint of the joint body are opposite to each other, and the joint bodies face each other, and the outer joint and the inner joint face each other. A locking collar to
Provided between the inner and outer joints of each joint body, all fitting projections and fitting recesses of the joint body are pivoted to all fitting depressions and fitting projections of the mating joint body. A biasing mechanism that elastically pivots and biases the inner joint and the outer joint in the circumferential direction opposite to each other in a state of being fitted in the direction, and latches the opposing locking collars to each other. A joint device for a structure having a feature.

2. The joint device for a structure according to claim 1, further comprising a connector for connecting the outer joint and the inner joint of each joint body in a state where the joint bodies are coupled to each other.

3. The fixing device according to claim 1, further comprising: a fixture that fixes an axial position of the outer joint and the inner joint of each joint body in a state where the joint bodies are coupled to each other. A joint device for a structure according to claim 1.

The structure joint device according to any one of claims 1 to 3, further comprising a positioning member that is fitted inside the inner joint and aligns a central axis of the structure and the joint body.