JP2004324353A

JP2004324353A - Connection metal fitting for temporary installation

Info

Publication number: JP2004324353A
Application number: JP2003123882A
Authority: JP
Inventors: Tadahiko Fujishiro; 忠彦藤城
Original assignee: RARIKKU KK
Current assignee: RARIKKU KK
Priority date: 2003-04-28
Filing date: 2003-04-28
Publication date: 2004-11-18
Anticipated expiration: 2023-04-28
Also published as: JP4061235B2; CN1542246A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection metal fitting for temporary installation in which a temporarily fixing claw inserted in a reception metal fitting does not improperly drop out due to a slight impulsion. <P>SOLUTION: The metal fitting is used for connecting to a reception metal fitting having a spigot opening, provided with a temporary element such as a handrail or a bracing, etc. in a support when constructing scaffolding etc. and it can be fitted to the end of the temporary element. The metal fitting is constituted of a metal fitting body in which a downward insertion claw fixable to the insertion opening and a wedge insertable in a erected state in the insertion opening through the through hole in a fixed state that the insertion claw of the metal fitting body is fixed in the insertion opening. The through hole is formed at the upper side of the metal fitting body to be horizontally held so that the front edge of the wedge can not be removed and an angle adjusting means which gets into contact with the inside edge of the through hole by pulling down the metal fitting and the wedge is made rotatable from the horizontal state to the erected state is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、工事現場において足場や支保工を構築するに際し、支柱に予め設けられた受け金具に手摺りや筋交い等の仮設要素を固定するための結合金具に関するものである。
【０００２】
【従来の技術】
従来、足場や支保工（以下、これらを総称して「足場等」という。）を構築するにあたっては、その周面に予め差込口を有する受け金具を溶接等により一体化した支柱が使用される。これに対して、手摺りや筋交い等の仮設要素の端部には楔部材が一体的に設けられ、該楔部材を支柱の前記受け金具に差し込むことによって仮設要素を支柱に結合する技術が存在する。この従来技術によれば、楔部材を受け金具に差し込むだけで、支柱に対する仮設要素の結合が完了するため、それまで使用されていたダブルクランプが不要となり、人員や作業時間に関して効率よく足場等を構築することができた。
【０００３】
【発明が解決しようとする課題】
しかし、上記従来技術にあっては、手摺り等の先行取付が不可能で、作業の安全性が担保されていなかった。即ち、従来技術の場合、楔部材は仮設要素の端部に溶接等により固設されていたため、当該仮設要素を支柱に結合するためには目的の階で当該作業をしなければならない。これに対して、仮設要素を目的階よりも一つ下の階より支柱に結合する、いわゆる先行取付が可能となれば、当該結合作業は常に先に取付けた手摺り等によって安全性が確保されることになる。
【０００４】
そこで本発明者は、上述した手摺り等の先行取付を可能とするため、図７に示したような結合金具を創作するに至った。即ち、当該結合金具は、手摺りや筋交い等の仮設要素５０に取付可能なコ字状チャンネル５１の上面側端部を下向きに折曲して仮固定用爪５２を形成すると共に、その上下面に貫通孔５３を形成してなる金具本体５４と、前記貫通孔５３に挿入可能な楔部材５５との組合せからなる。この結合金具を支柱６０の受け金具６１に結合するには、下階より仮設要素５０を手で支持して結合金具を目的階の受け金具６１まで持ち上げた後、該結合金具を支柱６０に向かって水平に移動させて仮固定用爪５２を受け金具６１の差込口６２上方に位置させ、さらに結合金具を下に引き下ろして仮固定用爪５２を受け金具６１に差し込む。この作業によって仮説要素５０は目的階より一つ下の階から先行的に仮固定できるから、これを上階へと繰り返し行うとき、常に作業階の安全性は先行的に仮固定された仮設要素によって確保されることになる。そして、楔部材５５をハンマー等を用いて受け金具６１に打ち込めば結合金具の本固定が完了する。
【０００５】
しかしながら、上記案出した結合金具にも次のような課題が存在する。それは、仮設要素５０は先行取付時に仮固定用爪５２による仮固定状態にあるが、金具本体５４の開口部５６のクリアランスＡは受け金具６１の全高Ｂよりも若干長く設定されるため、仮に結合金具に下向きの力が加われば仮固定用爪５２が受け金具６１より抜け出し、仮固定状態が解除され、仮設要素が落下するおそれもある。
【０００６】
そこでは、本発明は、多少の衝撃によっては受け金具に差し込んだ仮固定用爪が不用意に落下しない仮設用結合金具を提供することを目的としてなされた。
【０００７】
他方、上記従来技術では仮固定用爪５２の差込みと楔部材５５の打ち込みは別作業により行うことを前提としている。しかし、仮固定用爪５２の差込み時に楔部材５５をも同時に受け金具に挿入することができれば、より確実に結合金具の脱落を防止できて好ましい。このようないわゆるオートロック式の結合金具を開示するものして、特開２００１−１６４７４４号公報に開示の技術がある。同公報に開示の結合金具は、手摺り等の水平材の両端部に設けられるホルダー部材と、このホルダー部材内で支柱の受け金具とホルダー部材を締結する楔部材との組合せからなり、ホルダー部材を受け金具に嵌挿すると、楔部材の杆状部の内側縁が受け金具に当接することにより、楔部材の係止段部がホルダー部材の下部横桟から外れ、楔部材は自重で落下して楔部が受け金具の結合孔に落ち込み、ホルダー部材の前壁を支柱に圧接した状態で楔部が受け金具とホルダー部材を固定するというものである。
【０００８】
しかしながら、この結合金具では、次のような課題がある。即ち、第一に適用可能な受け金具がプレート状のものに制限されており、例えばポケット状の受け金具には適用することができない。第二に、この結合金具ではホルダー部材を水平に移動させて受け金具に嵌挿するため、手摺り等の先行取付が困難である。第三に、楔部材は、楔部と杆状部を二股状に形成し、さらに杆状部には係止段部を形成した複雑な構造であるため、成型あるいは製品コストがかさむという課題も否定できない。そこで本発明は、ここに説明した課題をも解決することを目的とするものである。
【０００９】
【課題を解決するための手段】
上述した目的を達成するために本発明では、足場等を構築する際、手摺りや筋交い等の仮設要素を支柱に設けた差込口を有する受け金具に連結するための結合金具であって、前記仮設要素の端部に取付可能で、且つ、前記差込口に掛止可能な下向きの挿入爪を設けた上部側に貫通孔を形成してなる金具本体と、該金具本体の挿入爪が差込口に掛止された状態で前記貫通孔を介して差込口に直立状態で差込み可能な楔とからなり、前記貫通孔は楔をその先端が抜脱不能な状態で水平保持するように金具本体の上部側に形成してなると共に、楔の先方には金具本体を引き下げることによって貫通孔の内側エッジと当接して楔を水平状態から起立状態に回転可能な角度調整部を設けるという手段を用いた。この手段によれば、楔は金具本体の貫通孔を介して受け金具に起立状態で突き刺さり、その楔効果によって仮設要素を受け金具に固定する。また、楔の角度調整部は、固定前に水平状態（寝かせた状態）にあっては上部側貫通孔内部にやや突出しており、挿入爪を受け金具に嵌め込む操作、即ち金具本体の引き下げ作業によって受け金具の内側エッジと当接して該角度調整部に上向きの力が作用する。すると、角度調整部に作用するその上向きの力は楔先端を支点とする回転力に変換して楔を水平状態から起立状態へと移行させる。
【００１０】
このような作用を行う角度調整部を構成するには、勾配縁の先方を湾曲状に膨成したり（請求項２）、勾配縁の先方を屈曲する（請求項３）ことによって達成することができる。
【００１１】
また、請求項４では、勾配縁とは他方縁に、上記作用によって楔が起立状態にあるとき、上部側貫通孔の内側エッジが係合可能な切欠部を設けるという手段を用いた。この手段によれば、楔の起立状態が安定する。そして、金具本体の体勢を変更したり、振動を加えることによって前記係合を解除すれば、楔は即座に自重によって落下する。
【００１２】
請求項５では、楔の先方寄りに重心が位置するように調整した。その具体的手段としては、楔の一部に抜きを形成したり（請求項６）、抜止部によって調整する（請求項７）ことを挙げることができる。このように先方寄りに重心が位置する楔は、上述した起立状態までの回転動作や落下動作がスムーズとなる。
【００１３】
さらに請求項８では、金具本体を、上下面のクリアランスが前記受け金具の全高よりも大きいコ字状チャンネルの上面側端部にその開口部のクリアランスが前記受け金具の全高よりも小さくなるように下向きに折曲した前記受け金具への挿入爪を設けて構成するという手段を用いた。この場合、金具本体の開口部（挿入爪の先端からチャンネルか下面まで）が受け金具の全高より小さいため、金具本体を前傾させなければ挿入爪を受け金具に挿入することができない。その反面、一度、挿入爪を受け金具に挿入したなら、衝撃等によって金具本体に上向きの力が加わったとしても挿入爪は受け金具から抜け出さないという作用を発揮する。
【００１４】
【発明の実施の形態】
以下、本発明の最良の実施の形態を添付した図面に従って説明する。図１の各図は、第一の実施形態に係り結合金具の正面（ａ）、側面（ｂ）、背面（ｃ）、平面（ｄ）を示したものであり、図中、符号１はコ字状チャンネルの上下折曲部の端部をさらに下向きに折曲して挿入爪１ａおよび受け顎１ｂを形成してなる金具本体、２は金具本体１の上部および下面に形成された貫通孔１ｃ・１ｄに嵌挿可能な楔、３は金具本体１の背板１ｅに一体に設けられた仮設要素の取付部材である。
【００１５】
各部材についてより詳しく説明すると、先ず金具本体１は、上下面のクリアランスを受け金具６の全高Ｈよりも大きく設定する一方、その開口部１０、即ち挿入爪１ａの先端と下面間のクリアランスＣは、図２に示したように、受け金具６の全高Ｈよりも小さく設定している。また、この金具本体１には、上述したように上部と下面それぞれに連通する貫通孔１ｃ・１ｄが形成されているが、より具体的には、正面図（図１ａ）に示したように、上部側貫通孔１ｃが下面側貫通孔１ｄよりも狭くなっている。これと共に、楔２の下端部には抜け止め用のリベット２ａが設けられており、下面側貫通孔１ｄは該リベット２ａの通過を許容する幅に設定する一方、上部側貫通孔１ｃをリベット２ａの幅よりも狭く設定することにより、金具本体１と別体とした楔２が上部側貫通孔１ｃから脱落しないように構成している。また、上部側貫通孔１ｃは、背面図（図１ｃ）に示したように、背板１ｅの上部まで切欠して形成されており、本結合金具の固定作業前において、楔２を寝かせた状態に保持できるようにしている。さらに、この上部側貫通孔１ｃを挿入爪１ａの上部まで欠切することによって、後述するように、楔２の起立状態を安定化させるようにしている。
【００１６】
一方、楔の具体的な構造は、図３に示したように、前後縁のうち一方を勾配縁２ｂとして、その先方に湾曲部２ｃを膨成すると共に、先端を円弧部２ｄとして、両者２ｃ・２ｄが連続するように成型している。湾曲部２ｃは、その段部２ｆ（勾配縁２ｂの直線部との境界部）から先端円弧部２ｄまでの間隔が、金具本体１における挿入爪１ａから背板１ｅまでの内寸とほぼ一致する大きさに形成されている。従って、楔２を金具本体１に寝かせた状態にセットしたとき、湾曲部２ｃが上部側貫通孔１ｃの内部で下向きに突出しつつ、段部２ｆと先端円弧部２ｄの二点支持によって当該状態を維持する。また、この実施形態では、他方の垂直縁２ｅの先方に切欠部２ｇを形成している。この切欠部２ｇは、後述するように、上部側貫通孔１ｃの挿入爪１ａ側エッジと係合することによって、楔２を起立させた状態に安定させるものである。
【００１７】
次に、上記構成の結合金具による仮設要素の固定作業を図４に従って説明する。なお、同図中、４は金具本体１の取付部材３に回動可能に連結した仮設要素、５は該仮設要素４に一体的に設けられた連結部材であって、取付部材３に連結した仮設要素４を筋交いなどの斜材とすれば、前記連結部材５には手摺りなどの別の仮設要素を連結することができ、この場合、全体として松葉状の筋交い兼用の手摺り枠を構成することができる。このような基本的構成は、本出願人の出願に係る特開２００３−４１７６０号公報にて公知となっているので、該公知技術を適宜採用することとし、ここでは詳細を省略する。
【００１８】
そして、当該手摺り枠の先行取付を例に説明すると、その作業に先だって、先ず楔２は、上述した要領に従って金具本体１の上面側に寝かさせた状態にセットしておき、仮設要素４を手で持ち上げて挿入爪１ａを受け金具６の上方まで位置させる（同図ａ）。次に、金具本体１の挿入爪１ａ側コーナー部１ｈが支柱７と接するように、仮設要素４を回動させて金具本体１を前傾させると共に、仮設要素４を若干引き下げる（同図ｂ）。こうすることによって、受け金具６の全高Ｈよりも幅狭な開口部１０を有する金具本体１の挿入爪１ａを受け金具６に挿入することができる。また、楔２は仮設要素４を回動した弾みで、その先端円弧部２ｄを支点としてこれと同方向に若干回動する（同図ｃ）。そして、仮設要素４を垂直となるように回動させ、さらに仮設要素４を引き下げることによって、挿入爪１ａを受け金具６に挿入したまま前傾した金具本体１を元の状態に戻すことができる。また、このとき楔２は、受け金具６の内側エッジ６ａに湾曲部２ｃが乗った状態となる（同図ｄ）。このように湾曲部２ｃが受け金具６の内側エッジ６ａに乗った状態では、楔２は尻上がり（先下がり）にやや傾斜した状態となる。そして、この状態から仮設要素４を操作して挿入爪１ａを支柱７から若干引き離し、且つ、仮設要素４を引き下げることによって、受け金具６の内側エッジ６ａが湾曲部２ｃを突き上げ、楔２は先端円弧部２ｄと挿入爪１ａの接点を支点として回転し、ほぼ起立した状態となる（同図ｅ）。このように、湾曲部２ｃは受け金具６の内側エッジ６ａと干渉して、楔２を水平状態から起立状態へと移行する角度調整部として機能するのである。
【００１９】
さらに仮設要素４を引き下げることによって、楔２を完全に垂直状態として、楔２を自重によって挿入爪１ａと受け金具６の間に落下させることは不可能ではなく、ここで固定作業が完了する場合もある。また、ここで固定作業が完了したとすれば、仮に結合金具に上向きの力が加わったとしても、挿入爪１ａは受け金具６から抜け出さない。金具本体１の開口部１０のクリアランスＣは受け金具６の全高Ｈよりも小さいからである。
【００２０】
しかし、図４ｅの状態では、楔２は湾曲部２ｃと先端円弧部２ｄの何れも楔先方の二点支持によって起立状態を維持しており、その途中で楔２が元の水平状態に倒れやすいという不安定さは否めない。そこで、この実施形態では、楔２によるオートロックに確実性を期すため、続いて次の作業を行う。即ち、上記図４ｅの状態から、金具本体１の受け顎１ｂと支柱７との接点を支点として、仮設要素４を図示半時計回りに回動させる（図４ｆ）。すると、楔２はその垂直縁２ｅの先方に挿入爪１ａからの押力が作用することによって、後部が支柱７にもたれ掛かるように回転する。こうすることによって、挿入爪１ａの内側エッジが楔２の垂直縁２ｅに設けた切欠部２ｇと係合し、結果、楔２の起立状態は、前記係合および、後部と支柱７との接触により安定する。そして、この状態から挿入爪１ａが支柱７と接するように金具本体１を支柱７側に押しやれば、前記係合が解除されて、楔２は鉛直方向に自重落下し（図４ｇ）、その先端が下面側貫通孔１ｄから突出するまで挿入爪１ａと受け金具６の隙間に突き刺さり、当該固定作業が完了する（図４ｈ）。
【００２１】
ここで、上記実施形態の別の特徴を説明すると、楔２には重心が先端寄りとなるように、２カ所に抜き２ｉを設けている。これによって、楔２の起立状態への移行および落下をスムーズに行うことができる。
【００２２】
なお、図４に示した作業手順は、各固定をいわばコマ送りの状態で説明したものであって、その操作は何ら困難を伴うことなく連続して行われ、また所要時間も僅か数秒であることが、本発明者による非公開の実験によって確認されている。また、楔２の垂直縁２ｅに形成した切欠部２ｇは、受け金具６の奥行きが比較的大きい場合に特に有効であって、奥行きが小さい場合は省略することも可能である。受け金具６の奥行きが小さい場合は楔２が容易に起立するからである。
【００２３】
次に図５に従って本発明の第二の実施形態を説明する。上記第一の実施形態からの構造上の変更点は、楔の先端形状のみであるので、ここでは変更点のみを説明する。即ち、この第二実施形態に係る楔２０は、その先端を勾配縁２１側に若干屈曲してなることを特徴とする。その屈曲箇所や屈曲率は、厳格に設定するものではないが、少なくとも楔２０を金具本体１に寝かせた状態にしたとき、その内側の角部２２が金具本体１における上部側貫通孔１ｃの背面側エッジと合致し、且つ、屈曲部２３が金具本体１の上部側貫通孔１ｃよりも下側に突出するように位置すればよい。これら角部２２や屈曲部２３は、上記第一実施形態の楔２において寝かせた状態を安定化させる段部２ｆと、受け金具６の内側エッジ６ａと当接して楔を起立させる湾曲部２ｃと同じ機能を持つからである。
【００２４】
この第二実施形態に係る楔２０を採用した結合金具による作業手順は、図６に示したように、先ず金具本体１を寝かさせた状態にセットしておき（同図ａ）、次に第一実施形態で説明したと同じ要領で挿入爪１ａを受け金具６に挿入し（同図ｂ）、この状態で仮設要素４を引き下げ操作すれば（同図ｃ）、受け金具６の内側エッジ６ａが屈曲部２３を突き上げることによって、その先端円弧部２４を支点として楔２０が回転して起立し（同図ｄ）、受け金具６と挿入爪１ａの隙間に楔２０が落下する（同図ｅ）。
【００２５】
このように上述した二つの実施形態とも、仮設要素の先行取付が可能であるばかりでなく、受け金具６に挿入した挿入爪１ａが不用意に抜け出すことがない上、仮設要素を操作するだけで楔によるオートロックが完了する。また、適用する受け金具も、ここで例示したポケット状のものだけでなく、従来技術で説明したプレート状のものであってもよい。ただし、この場合は、金具本体１の開口部１０のクリアランスＣを受け金具の全高Ｈよりも小さくすることはできないので、この要件を充足する必要はない。さらに金具本体、楔とも比較的簡単な構成であるので、その成型コストは従来技術のものに比して低い。なお、ここでは楔の自重落下によるオートロックを説明したが、さらに固定強度を高めるためには、事後的に楔をハンマー等で打ち込む利用方法を排除するものではない。
【００２６】
【発明の効果】
以上説明したように、本発明によれば、楔の先方に金具本体の上部側貫通孔から突出する受け金具との角度調整部を設けたので、挿入爪の受け金具への挿入直後からその操作に追随して前記角度調整部に上向きの力が働き、楔を水平状態から起立状態へと素早く移行させることができる。また、角度調整部の構成は膨成湾曲部を形成したり、楔の先方を屈曲するといった比較的簡単な構成であるから、その製品コストの上昇を抑制することができる。さらに、楔先方に重心を位置させたため、起立状態への移行や落下がスムーズになり、オートロック作業が簡単なものとなった。さらに、本発明の結合金具は受け金具に内側エッジがあるものであれば、プレート状やポケット状に関係なく適用することができるため、汎用性の高い仮設部材と位置付けることができる。さらにまた、本発明の結合金具を手摺りや筋交い、あるいは両者兼用の手摺り枠の連結用とすれば、その先行取付を用に行うことができるなど、足場等構築の安全に対する寄与度も非常に多きものである。
【図面の簡単な説明】
【図１】本発明の第一実施形態に係る結合金具の全体図
【図２】同結合金具と受け金具の関係を示した説明図
【図３】同結合金具における楔の詳細な説明図
【図４】同結合金具による手業手順を示した工程図
【図５】本発明の第二実施形態に係る結合金具の全体図
【図６】同結合金具による作業手順を示した工程図
【図７】本発明者が案出した従来結合金具の概略図
【符号の説明】
１金具本体
１ａ挿入爪
１ｂ受け顎
１ｃ上部側貫通孔
１ｄ下面側貫通孔
１ｅ背板
２、２０楔
２ａ抜止部（リベット）
２ｂ勾配縁
２ｃ膨成した湾曲部
２ｄ先端円弧部
２ｅ垂直縁
２ｆ段部
２ｇ切欠部
３取付部材
４仮設要素
５連結部材
６受け金具
６ａ内側エッジ
７支柱[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint fitting for fixing a temporary element such as a handrail or a brace to a receiving fixture provided in advance on a support when constructing a scaffold or a shoring at a construction site.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when constructing a scaffold or a shoring (hereinafter, these are collectively referred to as “scaffolds or the like”), a support column having a receiving metal fitting having an insertion port on its peripheral surface integrated by welding or the like is used. You. On the other hand, there is a technique in which a wedge member is integrally provided at an end of a temporary element such as a handrail or a brace, and the temporary element is connected to the column by inserting the wedge member into the receiving bracket of the column. . According to this conventional technique, since the connection of the temporary element to the column is completed only by inserting the wedge member into the receiving bracket, the double clamp used up to that point becomes unnecessary, and the scaffolding and the like can be efficiently provided with respect to personnel and working time. Could be built.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned prior art, prior mounting of a handrail or the like is impossible, and work safety has not been ensured. That is, in the case of the prior art, since the wedge member is fixed to the end of the temporary element by welding or the like, the work must be performed on the target floor in order to connect the temporary element to the column. On the other hand, if the temporary element can be connected to the column from the floor one level below the destination floor, so-called pre-installation is possible, the safety of the connection work is always ensured by the handrail etc. installed earlier. Will be.
[0004]
The inventor of the present invention has come up with a fitting as shown in FIG. That is, the joining fitting forms a temporary fixing claw 52 by bending the upper side end of the U-shaped channel 51 attachable to the temporary element 50 such as a handrail or a brace downward, and forms the temporary fixing claw 52 on the upper and lower surfaces thereof. It comprises a combination of a metal fitting body 54 having a through hole 53 formed therein and a wedge member 55 insertable into the through hole 53. In order to connect the joining metal fitting to the receiving metal fitting 61 of the column 60, the temporary element 50 is manually supported from the lower floor, and the connecting metal fitting is lifted up to the receiving metal fitting 61 on the destination floor. The temporary fixing claw 52 is positioned above the insertion port 62 of the receiving metal fitting 61 by moving the temporary fixing claw 52 downward, and the connecting metal fitting is further pulled down to insert the temporary fixing claw 52 into the receiving metal fitting 61. By this operation, the hypothetical element 50 can be temporarily fixed in advance from the floor immediately below the destination floor. Therefore, when this operation is repeatedly performed to the upper floor, the safety of the working floor is always temporarily fixed in advance. Will be secured by Then, when the wedge member 55 is driven into the receiving fitting 61 by using a hammer or the like, the permanent fixing of the connecting fitting is completed.
[0005]
However, the following problems are also present in the coupling hardware devised above. This is because the temporary element 50 is temporarily fixed by the temporary fixing claw 52 at the time of the preliminary mounting, but the clearance A of the opening 56 of the metal fitting body 54 is set to be slightly longer than the overall height B of the receiving metal fitting 61, so that it is temporarily connected. When a downward force is applied to the metal fitting, the temporary fixing claw 52 comes out of the receiving metal fitting 61, the temporary fixing state is released, and the temporary element may drop.
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a temporary connecting fitting in which a temporary fixing claw inserted into a receiving fitting is not inadvertently dropped by a slight impact.
[0007]
On the other hand, in the above-mentioned prior art, it is assumed that the insertion of the temporary fixing claw 52 and the driving of the wedge member 55 are performed by different operations. However, it is preferable that the wedge member 55 can be simultaneously inserted into the receiving metal fitting when the temporary fixing claw 52 is inserted, because it is possible to more reliably prevent the fitting metal from falling off. A technique disclosed in Japanese Patent Application Laid-Open No. 2001-164744 is one which discloses such a so-called auto-lock type fitting. The joining fitting disclosed in the publication is a combination of a holder member provided at both ends of a horizontal member such as a handrail, and a wedge member for fastening a holder member and a holder member within the holder member. When the wedge member is inserted into the receiving member, the inner edge of the rod-shaped portion of the wedge member comes into contact with the receiving member, so that the locking step of the wedge member comes off the lower horizontal rail of the holder member, and the wedge member falls by its own weight. As a result, the wedge portion falls into the coupling hole of the receiving member, and the wedge portion fixes the receiving member and the holder member in a state where the front wall of the holder member is pressed against the column.
[0008]
However, this joint has the following problems. That is, first, the applicable metal fitting is limited to a plate-shaped metal fitting, and cannot be applied to, for example, a pocket-shaped metal fitting. Second, in this connection fitting, since the holder member is moved horizontally and inserted into the receiving fitting, it is difficult to attach the handrail or the like in advance. Third, since the wedge member has a complicated structure in which the wedge portion and the rod-shaped portion are formed in a forked shape, and furthermore, the rod-shaped portion is formed with a locking step, so that there is also a problem that the molding or product cost increases. I can't deny it. Therefore, an object of the present invention is to solve the problems described here.
[0009]
[Means for Solving the Problems]
According to the present invention, in order to achieve the above-described object, when constructing a scaffold or the like, a connecting metal fitting for connecting a temporary element such as a handrail or a brace to a receiving metal fitting having an insertion port provided in a support, A fitting main body having a through hole formed on an upper side provided with a downward insertion claw that can be attached to the end of the temporary element and that can be hooked on the insertion port, is different from the insertion claw of the metal fitting body. A wedge that can be inserted upright into the insertion port through the through hole in a state of being hooked on the insertion port, and the through hole holds the wedge horizontally so that the tip thereof cannot be removed. Means are formed on the upper side of the metal fitting body, and provided at the tip of the wedge with an angle adjuster that can rotate the wedge from a horizontal state to a standing state by contacting the inner edge of the through hole by pulling down the metal fitting body. Was used. According to this means, the wedge penetrates the receiving fitting in an upright state through the through hole of the fitting main body, and the temporary element is fixed to the receiving fitting by the wedge effect. In addition, the wedge angle adjusting portion slightly protrudes into the upper side through hole in the horizontal state (in a laid state) before being fixed, and the insertion claw is fitted into the metal fitting, that is, the metal fitting main body lowering operation. As a result, an upward force acts on the angle adjusting portion by contacting the inner edge of the receiving fitting. Then, the upward force acting on the angle adjusting unit is converted into a rotational force with the tip of the wedge as a fulcrum, and the wedge is shifted from the horizontal state to the upright state.
[0010]
In order to configure the angle adjusting portion that performs such an action, it is achieved by expanding the front of the slope edge in a curved shape (claim 2) or bending the front of the slope edge (claim 3). Can be.
[0011]
According to the fourth aspect of the present invention, a notch is provided at the other edge of the slope edge so that the inner edge of the upper side through-hole can be engaged when the wedge is in an upright state by the above operation. According to this means, the standing state of the wedge is stabilized. Then, if the engagement is released by changing the posture of the bracket main body or applying vibration, the wedge immediately falls under its own weight.
[0012]
In claim 5, the adjustment is made such that the center of gravity is located closer to the front of the wedge. As a specific means therefor, it is possible to form a hole in a part of the wedge (claim 6) or to adjust the wedge by a retaining portion (claim 7). As described above, the wedge whose center of gravity is located closer to the front can smoothly rotate and fall to the above-described standing state.
[0013]
Further, in the eighth aspect, the metal fitting body is formed such that the clearance of the opening is smaller than the total height of the receiving metal fitting at the upper side end of the U-shaped channel whose clearance in the upper and lower surfaces is larger than the total height of the receiving metal fitting. Means was used in which an insertion claw for the receiving fitting bent downward was provided. In this case, since the opening of the metal fitting body (from the tip of the insertion claw to the channel or the lower surface) is smaller than the overall height of the receiving metal fitting, the insertion claw cannot be inserted into the receiving metal fitting unless the metal fitting body is tilted forward. On the other hand, once the insertion claw is inserted into the receiving fitting, the insertion claw does not come out of the receiving fitting even if an upward force is applied to the fitting main body due to an impact or the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the best mode of the present invention will be described with reference to the accompanying drawings. Each figure in FIG. 1 shows the front (a), side (b), back (c), and plane (d) of the fitting according to the first embodiment. A metal fitting body formed by bending the end of the vertically bent portion of the character-shaped channel further downward to form an insertion claw 1a and a receiving jaw 1b, and a through hole 1c formed in the upper and lower surfaces of the metal fitting body 1. A wedge 3 that can be inserted into 1d and a mounting member 3 for a temporary element provided integrally with the back plate 1e of the fitting body 1.
[0015]
Each member will be described in more detail. First, the metal fitting main body 1 receives the clearance of the upper and lower surfaces and sets it to be larger than the total height H of the metal fitting 6, while the opening 10 thereof, that is, the clearance C between the tip and the lower surface of the insertion claw 1a is As shown in FIG. 2, the overall height H of the receiving bracket 6 is set to be smaller. In addition, as described above, through-holes 1c and 1d communicating with the upper and lower surfaces of the metal fitting body 1 are formed. More specifically, as shown in the front view (FIG. 1a), The upper through hole 1c is smaller than the lower through hole 1d. At the same time, a rivet 2a is provided at the lower end of the wedge 2 to prevent the rivet 2a from passing therethrough, while the lower surface side through hole 1d is set to a width that allows the rivet 2a to pass through. By setting the width to be smaller than the width, the wedge 2 separate from the metal fitting main body 1 is configured not to fall out of the upper side through hole 1c. Further, as shown in the rear view (FIG. 1c), the upper side through hole 1c is formed by cutting out to the upper part of the back plate 1e, and the wedge 2 is laid down before the fixing work of the present fitting is performed. To be able to hold. Further, by cutting the upper side through hole 1c up to the upper part of the insertion claw 1a, the upright state of the wedge 2 is stabilized as described later.
[0016]
On the other hand, as shown in FIG. 3, the specific structure of the wedge is such that one of the front and rear edges is a sloped edge 2b, and a curved portion 2c is swelled in front of the sloped edge 2b. -Molded so that 2d is continuous. In the curved portion 2c, the distance from the step portion 2f (boundary portion of the sloped edge 2b to the linear portion) to the distal end arc portion 2d substantially matches the inner size of the metal fitting body 1 from the insertion claw 1a to the back plate 1e. It is formed in size. Therefore, when the wedge 2 is set on the metal fitting body 1, the curved portion 2 c protrudes downward inside the upper side through hole 1 c, and the two-point support of the step portion 2 f and the tip arc portion 2 d changes the state. maintain. In this embodiment, a cutout portion 2g is formed ahead of the other vertical edge 2e. The notch 2g stabilizes the wedge 2 in an upright state by engaging with the insertion claw 1a side edge of the upper side through hole 1c, as described later.
[0017]
Next, the operation of fixing the temporary element by the above-described connecting fitting will be described with reference to FIG. In the figure, reference numeral 4 denotes a temporary element rotatably connected to the mounting member 3 of the metal fitting body 1 and reference numeral 5 denotes a connecting member integrally provided with the temporary element 4, which is connected to the mounting member 3. If the temporary element 4 is made of a diagonal material such as a brace, another temporary element such as a handrail can be connected to the connecting member 5. In this case, a handrail frame that is also used as a crutch as a whole is formed. can do. Since such a basic configuration is known in Japanese Patent Application Laid-Open No. 2003-41760 filed by the present applicant, the known technology is appropriately adopted, and the details are omitted here.
[0018]
To explain the pre-attachment of the handrail frame as an example, prior to the work, first, the wedge 2 is set in a state of being laid on the upper surface side of the fitting main body 1 according to the above-described procedure, and the temporary element 4 is set. Is lifted up by hand, and the insertion claw 1a is positioned above the metal fitting 6 (FIG. 2A). Next, the temporary element 4 is rotated to tilt the metal fitting body 1 forward so that the corner 1h on the side of the insertion claw 1a of the metal fitting body 1 comes into contact with the support column 7, and the temporary element 4 is slightly lowered (FIG. 6B). . By doing so, the insertion claw 1a of the fitting main body 1 having the opening 10 narrower than the overall height H of the receiving fitting 6 can be inserted into the receiving fitting 6. Further, the wedge 2 is a spring that rotates the temporary element 4 and slightly rotates in the same direction with the circular arc portion 2d as a fulcrum (FIG. 3C). Then, by rotating the temporary element 4 so as to be vertical and further lowering the temporary element 4, the fitting main body 1 tilted forward can be returned to the original state while the insertion claw 1a is inserted into the receiving fitting 6. . Also, at this time, the wedge 2 is in a state where the curved portion 2c rides on the inner edge 6a of the receiving metal member 6 (FIG. 4D). In the state where the curved portion 2c rides on the inner edge 6a of the receiving fitting 6, the wedge 2 is in a state of being slightly inclined upward (downward). In this state, the temporary element 4 is operated to slightly separate the insertion claw 1a from the column 7 and the temporary element 4 is lowered, so that the inner edge 6a of the receiving fitting 6 pushes up the curved portion 2c, and the wedge 2 It rotates about the contact point between the arc portion 2d and the insertion claw 1a and becomes almost upright (e in the figure). As described above, the curved portion 2c interferes with the inner edge 6a of the receiving fitting 6, and functions as an angle adjusting portion for shifting the wedge 2 from the horizontal state to the upright state.
[0019]
Further, by lowering the temporary element 4, it is not impossible to bring the wedge 2 to a completely vertical state and drop the wedge 2 between the insertion claw 1 a and the receiving fitting 6 by its own weight. There is also. If the fixing operation is completed here, even if an upward force is applied to the joint fitting, the insertion claw 1a does not come out of the receiving fitting 6. This is because the clearance C of the opening 10 of the fitting main body 1 is smaller than the overall height H of the receiving fitting 6.
[0020]
However, in the state of FIG. 4E, the wedge 2 maintains the upright state by the two-point support of the wedge tip at both the curved portion 2c and the tip arc portion 2d, and the wedge 2 easily falls back to the original horizontal state on the way. That instability is undeniable. Then, in this embodiment, in order to ensure the automatic locking by the wedge 2, the following work is subsequently performed. That is, from the state shown in FIG. 4e, the temporary element 4 is rotated counterclockwise in the drawing with the contact point between the receiving jaw 1b of the metal fitting body 1 and the support 7 as a fulcrum (FIG. 4f). Then, the wedge 2 is rotated so that the rear portion leans on the column 7 by the pressing force from the insertion claw 1a acting on the front side of the vertical edge 2e. By doing so, the inner edge of the insertion claw 1a engages with the notch 2g provided on the vertical edge 2e of the wedge 2, and as a result, the upright state of the wedge 2 is determined by the engagement and the contact between the rear portion and the support column 7. To be more stable. Then, when the fitting body 1 is pushed toward the column 7 so that the insertion claw 1a contacts the column 7 from this state, the engagement is released, and the wedge 2 falls by its own weight in the vertical direction (FIG. 4g). Until the tip protrudes from the lower surface side through-hole 1d, the tip is pierced into the gap between the insertion claw 1a and the receiving fitting 6, and the fixing operation is completed (FIG. 4h).
[0021]
Here, another feature of the above embodiment will be described. The wedge 2 is provided with two holes 2i so that the center of gravity is closer to the tip. Thus, the transition of the wedge 2 to the upright state and the fall can be performed smoothly.
[0022]
In the work procedure shown in FIG. 4, each fixation is described in the state of frame advance, and the operation is performed continuously without any difficulty, and the time required is only a few seconds. This has been confirmed by a private experiment by the present inventors. The notch 2g formed in the vertical edge 2e of the wedge 2 is particularly effective when the depth of the receiving metal 6 is relatively large, and can be omitted when the depth is small. This is because when the depth of the receiving fitting 6 is small, the wedge 2 stands up easily.
[0023]
Next, a second embodiment of the present invention will be described with reference to FIG. The only structural change from the first embodiment is the shape of the tip of the wedge, so only the change will be described here. That is, the wedge 20 according to the second embodiment is characterized in that its tip is slightly bent toward the slope edge 21 side. Although the bending portion and the bending ratio are not strictly set, at least when the wedge 20 is laid on the metal fitting body 1, the inner corner portion 22 is formed on the rear surface of the upper side through hole 1 c in the metal fitting body 1. What is necessary is just to be located so that it may correspond to a side edge and the bent part 23 may project below the upper side through-hole 1c of the metal fitting main body 1. The corner portion 22 and the bent portion 23 include a stepped portion 2f for stabilizing the laid state in the wedge 2 of the first embodiment and a curved portion 2c for abutting the inner edge 6a of the receiving fitting 6 to erect the wedge. It has the same function.
[0024]
As shown in FIG. 6, the work procedure using the connecting fitting employing the wedge 20 according to the second embodiment is as follows. First, the fitting main body 1 is set in a lying state (a in FIG. 6), and then, When the insertion claw 1a is inserted into the receiving fitting 6 in the same manner as described in the first embodiment (b in the drawing) and the temporary element 4 is pulled down in this state (c in the drawing), the inner edge of the receiving fitting 6 is obtained. 6a pushes up the bent portion 23, so that the wedge 20 rotates with the tip arc portion 24 as a fulcrum and rises (d in the figure), and the wedge 20 falls into the gap between the receiving fitting 6 and the insertion claw 1a (the same figure). e).
[0025]
As described above, in both of the above-described embodiments, not only the provisional attachment of the temporary element is possible, but also the insertion claw 1a inserted into the receiving metal member 6 is not inadvertently pulled out, and only by operating the temporary element. Automatic locking by the wedge is completed. Further, the metal fitting to be applied is not limited to the pocket-shaped one illustrated here, but may be the plate-shaped one described in the related art. However, in this case, since the clearance C of the opening 10 of the metal fitting body 1 cannot be made smaller than the total height H of the metal fitting, it is not necessary to satisfy this requirement. Further, since both the metal fitting body and the wedge have relatively simple structures, the molding cost is lower than that of the prior art. Although the automatic locking by the falling of the weight of the wedge has been described here, a method of driving the wedge with a hammer or the like afterwards in order to further increase the fixing strength is not excluded.
[0026]
【The invention's effect】
As described above, according to the present invention, since the angle adjustment portion with the receiving fitting protruding from the upper side through hole of the fitting main body is provided in front of the wedge, the operation is performed immediately after the insertion claw is inserted into the receiving fitting. An upward force acts on the angle adjusting section following the above, and the wedge can be quickly shifted from the horizontal state to the upright state. Further, since the configuration of the angle adjusting section is a relatively simple configuration such as forming a swelling curved section or bending the tip of a wedge, it is possible to suppress an increase in product cost. Furthermore, since the center of gravity is located at the tip of the wedge, the transition to the upright state and the fall are smooth, and the auto-lock work is simplified. Furthermore, since the connection fitting of the present invention can be applied irrespective of a plate shape or a pocket shape as long as the reception fitting has an inner edge, it can be positioned as a versatile temporary member. Furthermore, if the connecting bracket of the present invention is used for connecting handrails or bracing, or a dual-purpose handrail frame, it can be used for pre-installation, and the contribution to the safety of construction of scaffolds and the like is very large. There are many things.
[Brief description of the drawings]
FIG. 1 is an overall view of a fitting according to a first embodiment of the present invention. FIG. 2 is an explanatory view showing the relationship between the fitting and a receiving fitting. FIG. 3 is a detailed explanatory view of a wedge in the fitting. FIG. 4 is a process chart showing a manual procedure using the same fitting. FIG. 5 is an overall view of a fitting according to a second embodiment of the present invention. FIG. 6 is a process diagram showing a working procedure using the same fitting. 7: Schematic diagram of conventional fittings devised by the inventor [Description of reference numerals]
Reference Signs List 1 metal fitting body 1a insertion claw 1b receiving jaw 1c upper side through hole 1d lower side through hole 1e back plate 2, 20 wedge 2a retaining part (rivet)
2b Inclined edge 2c Swelled curved portion 2d Tip arc 2e Vertical edge 2f Step 2g Notch 3 Mounting member 4 Temporary element 5 Connecting member 6 Receptacle 6a Inner edge 7 Prop

Claims

足場等を構築する際、手摺りや筋交い等の仮設要素を支柱に設けた差込口を有する受け金具に連結するための結合金具であって、前記仮設要素の端部に取付可能で、且つ、前記差込口に掛止可能な下向きの挿入爪を設けた上部側に貫通孔を形成してなる金具本体と、該金具本体の挿入爪が差込口に掛止された状態で前記貫通孔を介して差込口に直立状態で差込み可能な楔とからなり、前記貫通孔は楔をその先端が抜脱不能な状態で水平保持するように金具本体の上部側に形成してなると共に、楔の先方には金具本体を引き下げることによって貫通孔の内側エッジと当接して楔を水平状態から起立状態に回転可能な角度調整部を設けたことを特徴とする仮設用結合金具。When constructing a scaffold or the like, it is a fitting for connecting a temporary element such as a handrail or a brace to a receiving fitting having an insertion port provided in a support, and can be attached to an end of the temporary element, and A fitting body having a through hole formed on an upper side provided with a downward insertion claw that can be hooked on the insertion port; and the through hole in a state where the insertion claw of the fitting body is hooked on the insertion port. And a wedge that can be inserted into the insertion port in an upright state through the through hole, and the through-hole is formed on the upper side of the bracket main body so as to horizontally hold the wedge in a state where its tip cannot be removed, A fitting for temporary attachment, characterized in that an angle adjuster is provided at the tip of the wedge so as to be able to rotate the wedge from a horizontal state to an upright state by contacting the inner edge of the through-hole by pulling down the fitting body.

角度調整部は楔における勾配縁の先方を湾曲状に膨成してなる請求項１記載の仮設用結合金具。The temporary fitting according to claim 1, wherein the angle adjusting portion is formed by expanding a curved edge of the wedge in a forward direction.

角度調整部は楔の先方を勾配縁側に屈曲してなる請求項１記載の仮設用結合金具。The temporary fitting according to claim 1, wherein the angle adjusting portion is formed by bending a front end of the wedge toward a slope edge.

勾配縁とは他方縁に、楔が起立状態にあるとき、上部側貫通孔の内側エッジと係合可能な切欠部を設けた請求項１、２または３記載の仮設用結合金具。4. The temporary fitting according to claim 1, wherein a notch is provided on the other edge of the sloped edge so as to engage with the inner edge of the upper through hole when the wedge is in an upright state.

楔は先方寄りに重心が位置するように調整した請求項１から４のうち何れか一項記載の仮設用結合金具。The temporary fitting according to any one of claims 1 to 4, wherein the wedge is adjusted so that the center of gravity is located closer to the front.

重心は楔の一部に形成した抜きにより調整される請求項５記載の仮設用結合金具。6. The temporary fitting according to claim 5, wherein the center of gravity is adjusted by a punch formed in a part of the wedge.

重心は抜止部により調整される請求項５または６記載の仮設用結合金具。The temporary fitting according to claim 5, wherein the center of gravity is adjusted by a retaining portion.

金具本体は、上下面のクリアランスが前記受け金具の全高よりも大きいコ字状チャンネルの上面側端部にその開口部のクリアランスが前記受け金具の全高よりも小さくなるように下向きに折曲した前記受け金具への挿入爪を設けた請求項１から７のうち何れか一項記載の仮設用結合金具。The metal fitting body is bent downward so that the clearance of the opening is smaller than the total height of the receiving metal fitting at the upper side end of the U-shaped channel whose clearance on the upper and lower surfaces is larger than the total height of the receiving metal fitting. The temporary fitting according to any one of claims 1 to 7, further comprising an insertion claw to the receiving fitting.