JP4435356B2

JP4435356B2 - C-shaped steel connection hardware

Info

Publication number: JP4435356B2
Application number: JP2000023496A
Authority: JP
Inventors: 明宏蜂巣
Original assignee: 明宏蜂巣
Priority date: 2000-02-01
Filing date: 2000-02-01
Publication date: 2010-03-17
Anticipated expiration: 2020-02-01
Also published as: JP2001214513A

Description

【０００１】
【発明の属する技術分野】
本発明は、建築構造物の鉄骨資材として使用されるＣ形鋼とＣ形鋼相互、またはＣ形鋼と他の鉄骨資材とを、所望の位置で溶接の必要なく簡単にして確実に接続することのできるＣ形鋼接続用金物の改良に関するものである。
【０００２】
【従来の技術】
従来におけるこの種のＣ形鋼接続用金物としては、各種のものが知られており、一つの例としては、Ｃ形鋼における溝開口面の内側に当て板を配置するとともに、溝開口面の外側に他の鋼材と接続される連結面をもったＬ字状の接続部材を当てがって、溝開口面の内側の当て板と外側の接続部材をとをボルト・ナットにより連結して、Ｌ字状接続部材の連結面に他の鋼材が接続できるようにした構成のＣ形鋼接続用金物が特開平８−４２００２号により知られている。
【０００３】
また、図１１に示すように、Ｃ形鋼３０の横幅Ｒとほぼ同じ横幅Ａ１とＣ形鋼３０内から直角に溝開口面３１の外側へ突出する所定の長さＢとをもった連結面２４と、Ｃ形鋼３０内において前記連結面２４と直角な面を形成する固定面２５と、この固定面２５から前記連結面と同方向へ平行に延びる前記連結面２４よりも長さの短い支承面２６とを有し、前記連結面２４の両側縁中央部にＣ形鋼３０の溝開口面３１の両側辺３１ａ，３１ｂが挿入する切込み溝２７，２７を設けたＣ形鋼接続用金物２０が本出願人により特開平１１−２６９９８３号として提唱されている。
【０００４】
このＣ形鋼接続用金物２０は、取付けに際し、連結面２４の固定面２５と支承面２６とをＣ形鋼溝開口面３１の長手方向と平行な向きにしてＣ形鋼３０内へ挿入したのち、前記連結面２４を時計針方向へ９０度回転して連結面２４の両側縁切込み溝２７，２７にＣ形鋼溝開口面３１の両側辺３１ａ，３１ｂを挿通させ、固定面２４をネジ２８等によりＣ形鋼ウエブ３９に固定する。
【０００５】
【発明が解決すべき課題】
上記のように、従来のＣ形鋼接続用金物のうち、特開平８−４２００２号の接続用金物では、溝開口面の内外を内側の当て板と外側のＬ字状接続部材とをボルト・ナットにより一体に締め付ける構造であるため、取付け作業にあたっては、予めボルトを挿通しておいた当て板を溝開口面の内側に配置して、溝開口面内に差し入れた手でこの当て板のボルトヘッドの部分を押さえおかないと、溝開口面の外側にＬ字状接続部材を取付けることができず、また、ナットをボルトに螺着できないという問題があり、狭い空間の溝開口面内に差し入れた手で当て板を押さえていなければならないことによる作業上の煩わしさと、作業が能率的でないという問題点を有している。
【０００６】
一方、従来のＣ形鋼接続用金物のうち、特開平１１−２６９９８３号に開示された接続用金物２０では、取付けに際し、連結面２４と固定面２５と支承面２６とを有する基端側２４ａをＣ形鋼溝開口面３１の長手方向と平行な向きにしてＣ形鋼３０内へ挿入したのち、前記連結面２４を時計針方向へ９０度回転して連結面２４の両側縁切込み溝２７，２７にＣ形鋼溝開口面３１の両側辺３１ａ，３１ｂを挿通し、固定面２５をネジ２８等によりＣ形鋼ウエブ３９に固定するだけで接続用金物２０をＣ形鋼３０の溝開口面３１の外方へ突設することができるので、接続用金物の取付け作業を能率的に行なえるという利点を有する。
【０００７】
しかし、上記の接続用金物２０では、Ｃ形鋼溝開口面３１の外側にＣ形鋼の長さ方向と直交する連結面２４を簡単に突設することができるので、鉄骨の組み立て作業に際して、作業者がＣ形鋼溝開口面３１の外側にこの接続用金物２０を取付けたあと、連結面２４に別のＣ形鋼を接続する前に、この接続用金物２０の連結面２４に足を掛けて鉄骨によじ登ったり、体を支えたりするように、接続用金物を足場代わりに使用することがある。
【０００８】
この接続用金物を上記のように取り扱った場合、この金物は、取付けの際に、連結面２４と固定面２５と支承面２６とを有する基端側２４ａをＣ形鋼溝開口面３１の長手方向と平行な向きにしてＣ形鋼内へ挿入し、連結面２４を９０度回転することで連結面２４をＣ形鋼溝開口面３１の長さ方向と直交する向きに配置して、固定面２５をネジ２８等によりＣ形鋼ウエブ３９に固定するので、突設された連結面２４に足を掛けると、体の動きにつれて連結面２４が固定面２５のネジ２８を中心に回転して、ネジ２８とＣ形鋼ウエブ３９との固着部が緩み、接続用金物２０がＣ形鋼１から脱落するという危険性がある。
【０００９】
【課題を解決するための手段】
本発明は、上記特開平１１−２６９９８３号により開示された接続用金物がＣ形鋼に取付けられた状態で、作業者が、仮に足場代わりに使用し、連結面に足を掛けてよじ登ったり、体を支えたりしても固定面のネジによる固定部が緩むことなく、取付けが簡単で、しかも確実な固定状態が維持できて安全性の高いＣ形鋼接続用金物を提供できるようにしたものである。
【００１０】
請求項１の発明は、そのための具体的手段として、Ｃ形鋼の横幅とほぼ同じ横幅とＣ形鋼内から直角に溝開口面の外側へ突出する所定の長さとをもった連結面と、Ｃ形鋼内において前記連結面と直角な面を形成する固定面と、この固定面から前記連結面と同方向へ平行に延びる前記連結面よりも長さの短い支承面とを有し、前記連結面の両側縁中央部にＣ形鋼の溝開口面の両側辺が挿入する切込み溝を設けたＣ形鋼接続用金物であって、この連結面の固定面と支承面とを備えた基端側をＣ形鋼溝開口面の長手方向と平行な向きにしてＣ形鋼内へ挿入したのち、前記連結面を９０度回転して連結面両側縁の切込み溝にＣ形鋼溝開口面の両側辺を挿通し、固定面をネジ等によりＣ形鋼ウエブに固定するＣ形鋼接続用金物において、連結面両側縁の切込み溝における固定面側の下縁に、それぞれこれらの切込み溝の溝幅を溝の入口側で広く内奥側で狭くなるような段を設けて二段形とし、これら左右の切込み溝における段と段の間隔をＣ形鋼溝開口面の両側辺開口幅内に嵌合する長さとしたことを特徴とする。
【００１１】
請求項２の発明は、請求項１の発明において、支承面における固定面から上端縁までの高さが、連結面切込み溝の入口側における下縁の高さ位置と同じであって、この上端縁には、連結面基端側におけるいずれか一方の切込み溝の段と対称的な段が設けられていることを特徴とする。
【００１２】
【発明の実施の形態】
本発明に係るＣ形鋼接続用金物の構造を、図面に示す実施例について説明すると、図１は、Ｃ形鋼接続用金物２の形状を示す斜視図。図２は水平に配置されたＣ形鋼１と、このＣ形鋼１に取付けられた接続用金物２の斜視図であって、この接続用金物２は、所定の厚さの金属板を折り曲げることで、Ｃ形鋼１の内側横幅Ｒとほぼ同じ横幅Ａ１と、Ｃ形鋼１内から直角に溝開口面３の外側へ突出する所定の長さＢとをもった連結面４と、Ｃ形鋼１内において前記連結面４と直角な面を形成する固定面５と、この固定面５から前記連結面と同方向へ平行に延びる前記連結面４よりも長さの短い支承面６とを備えている。
【００１３】
前記連結面４は、両側縁中央部にＣ形鋼１の溝開口面３の両側辺３ａ，３ｂが挿入するための水平な切込み溝７１，７２が設けられていて、これらの溝７１，７２の下方における固定面５と支承面６とを有する基端側４ａと、前記溝７１，７２の上方におけるＣ形鋼溝開口面３の外側へ突出する突出側４ｂとに分けられている。
【００１４】
そして、基端側４ａの長さ、つまり固定面５の下面と切込み溝７１，７２の上縁７ａとの間の間隔Ｄ１が、Ｃ形鋼１におけるウエブ９の内面と溝開口面３の両側辺３ａ，３ｂの上面との間の長さＳに等しいか若干大きくなっていて、この基端側４ａの長さＤ１とＣ形鋼溝開口面３の外側へ突出する突出側４ｂの長さＤ２とにより連結面４の全体の長さＢが形成されている。
【００１５】
図１に示すように、連結面４の両側縁中央部に設けられる切込み溝７１，７２は、それぞれ連結面４の両側縁から面の内側に向かって水平に切り込まれた、Ｃ形鋼溝開口面３の両側辺３ａ，３ｂが嵌まり込むことのできるような共通の長さＥを備えているとともに、いずれか一方の切込み溝、例えば溝７１は、共通の長さＥの０．５倍程度大きい長さＥｎを有するように設定されている。
【００１６】
また、切込み溝７１，７２の溝幅は、いずれも溝７１，７２の内奥側では、上縁７ａと内奥側下縁７ｂ_１との間にＣ形鋼溝開口面３の両側辺３ａ，３ｂが挿通することのできるような溝幅Ｆが設けられているが、溝７１，７２の入口側では、上縁７ａと入口側下縁７ｂ_２との間が前記内奥側溝幅Ｆの２倍程度の広い溝幅Ｇに設定され、入口側下縁７ｂ_２と内奥側下縁７ｂ_１との間にそれぞれ段８ａ，８ｂが設けられている。
【００１７】
前記の段８ａ，８ｂは、いずれも連結面突出側４ｂの両側縁入口側から内奥側へ入り込んだ等しい長さＨの位置に設けられていて、これらの一方の段８ａと他方の段８ｂとの間隔ＫはＣ形鋼溝開口面３における両側辺３ａ，３ｂの開口幅Ｔ内に嵌まり込むような長さに設定されている。
【００１８】
さらに、連結面４の下方の基端側４ａは、左右いずれか一方の側縁１０ａ、例えば、長さの大きい切込み溝７１が設けられた側の側縁をカットすることで、横幅Ａ２が上方の突出側４ｂの横幅Ａ１より短くなるように設定されている。
【００１９】
一方、連結面４の下方に設けられる固定面５は、連結面４と支承面６との間隔ＭがＣ形鋼溝開口面３の開口幅Ｔよりも小さく設定されていて、図７に示すように、この接続用金物をＣ形鋼１内に取付ける際に、連結面基端側４ａを連結面４がＣ形鋼溝開口面３の長さ方向と平行な向きにして、溝開口面３内に嵌め込んだ時にＣ形鋼１内へ余裕をもって嵌合することができるような大きさに設定されている。
【００２０】
上記固定面５の横幅Ｎは、一方の側縁１１ａが前記連結面基端側４ａの短くカットされた側縁１０ａと同一線上に延びていて、他方の側縁１１ｂは前記連結面基端側４ａの側縁１０ｂよりも内側方向に短くなるようにカットされることで、連結面基端側４ａの横幅Ａ２よりも短くなるように設定されている。
【００２１】
さらに、上記固定面５の先端に設けられる支承面６は、一方の側縁１２ａが前記固定面５の側縁１１ａよりも外側へはみ出すように突出していて、他方の側縁１２ｂは前記固定面５の内側方向に短くなるようにカットされた側縁１１ｂと同一線上に延びるように設けられていて、側縁１２ａと１２ｂとの間の長さが連結面基端側４ａの横幅Ａ２と同じ大きさとなっている。
【００２２】
上記支承面６の固定面５から上端縁６ａまでの高さＱは、連結面４に設けられた切込み溝７１，７２の入口側における下縁７ｂ_２と同じ高さであるが、この上端縁６ａには、連結面基端側４ａにおけるいずれか一方の切込み溝７１の段８ａもしくは他方の切込み溝７２の８ｂと対称的な段１３が設けられている。
【００２３】
なお、連結面基端側４ａの中央部には配線貫通孔１４、連結面突出側４ｂの中央部には他のＣ形鋼もしくは鉄骨との接続に使用するボルト孔１５が設けられ、固定面５にはタッピングネジ挿通孔１６が開設されていて、支承面６の上端縁６ａの中央部には前記基端側４ａの配線貫通孔１４と連通する半円形の配線用切欠き部１７が設けられている。なお、前記固定面５のタッピングネジ挿通孔１６は一個でもよいが２個程度間隔をおいて設けることが好ましい。
【００２４】
本発明のＣ形鋼接続用金物２は、上記の構造からなり、Ｃ形鋼１への取付けに際しては、図７に示すように、連結面基端側４ａと固定面５と支承面６とをＣ形鋼溝開口面３の長さ方向と平行な向きにして、溝開口面３内に嵌め込んでから、全体を時計針方向へ９０度回転する。
【００２５】
この接続用金物２がＣ形鋼１内で回転されると、連結面４の長さの大きい方の切込み溝７１内へ、Ｃ形鋼１の溝開口面３の一方の側辺３ａが挿入されて回転が継続できると共に、回転方向の前側となる連結面基端側４ａの側縁１０ａと、この連結面基端側側縁１０ａと対角線上にある支承面６の側縁１２ｂが短くカットされていることで、金物２のＣ形鋼１内での回転が支障なく行なえ、最終的に図８に示すように、連結面４の両側切込み溝７１，７２がＣ形鋼溝開口面３の両側辺３ａ，３ｂに挿入されて、連結面突出側４ｂがＣ形鋼溝開口面３の長手方向と直角な向きまで回転される。
【００２６】
接続用金物２をこの状態でＣ形鋼１に固定するためには、図８に示すように、固定面５に開設した左右のネジ挿通孔１６にタッピングネジ１８を挿入して、Ｃ形鋼１のウエブ９の内面に食い込ませる。
【００２７】
図９に示すように、タッピングネジ１８を固定面５のネジ挿通孔１６に通して、その先端をＣ形鋼ウエブ９の表面へ食い込ませると、ネジ挿通孔１６の内周に雌ネジが形成されて、固定面５が切込み溝７１，７２の入口側における広い溝幅Ｇの隙間分だけＣ形鋼１内で浮き上がり、接続用金物２は最終的に切込み溝７１，７２の入口側下縁７ｂ_２がＣ形鋼溝開口面両側辺３ａ，３ｂの裏面に接触する高さ位置まで上昇することになる。
【００２８】
このように切込み溝７１，７２の入口側下縁７ｂ_２がＣ形鋼溝開口面両側辺３ａ，３ｂの裏面に接触する高さ位置まで上昇した状態では、切込み溝７１，７２の入口側下縁７ｂ_２と内奥側下縁７ｂ_１との間に設けられた段８ａ，８ｂが、いずれもＣ形鋼溝開口面両側辺３ａ，３ｂの溝開口幅Ｔ内へ嵌め込まれた状態となるため、接続用金物２はＣ形鋼１内で左右いずれの方向にも回転しないことになり、タッピングネジ１８によるＣ形鋼ウエブ９への締め付け力が緩まない限り、Ｃ形鋼１内に確実に固定されることになる。
【００２９】
この接続用金物２は、切込み溝７１，７２における入口側下縁７ｂ_２と内奥側下縁７ｂ_１との間に段８ａ，８ｂを設けたので、これらの段８ａ，８ｂがＣ形鋼１の溝開口幅Ｔ内へ嵌め込まれることで、Ｃ形鋼１内で回転しないように固定することができるが、支承面６の上端縁６ａにも、連結面４におけるいずれか一方の切込み溝７１の段８ａもしくは他方の切込み溝７２の８ｂと対称的な段１３を設けておくことにより、支承面６の段１３が一方のＣ形鋼溝開口面側辺３ａもしくは３ｂのエッジに係止されて、連結面４と支承面６の段８ａ，８ｂ及１３とＣ形鋼溝開口幅Ｔとの係合により接続用金物２の回転阻止作用を一層確実なものとする。
【００３０】
なお、上記実施例では、図１に示すように、接続用金物２の形状として、連結面基端側４ａの左側の側縁１０ａと、これと対角線上に位置する支承面６の右側の側縁１２ｂとをカットした形状について述べたが、図１０に示す別の実施例の金物２のように、連結面基端側４ａの右側の側縁１０ｂと、これと対角線上に位置する支承面６の左側の側縁１２ａとをカットした形状としてもよく、この場合にはＣ形鋼１内で反時計針方向に回転することでＣ形鋼１に取付けることができる。
【００３１】
【発明の効果】
本発明の接続用金物では、連結面４の切込み溝７１，７２における入口側下縁７ｂ_２と内奥側下縁７ｂ_１との間に、Ｃ形鋼溝開口幅Ｔ内へ嵌合する間隔をおいて段８ａ，８ｂを設けたので、タッピングネジ１８により固定面５をＣ形鋼ウエブ９から引き離すように締付けると、切込み溝７１，７２の段８ａ，８ｂがＣ形鋼溝開口幅Ｔ内へ嵌め込ませてＣ形鋼内での回転を確実に阻止することができ、従って、鉄骨の組み立て作業に際し、作業者が取付けられた接続用金物２を足場代わりに使用して、連結面突出側４ｂに足を掛けてよじ登ったり、体を支えたりしても、連結面４がＣ形鋼内で回転することを防止し、作業の安全性を高めることができる。
【００３２】
また、この接続用金物はＣ形鋼１内へ溝開口面３と平行に嵌合してから回転することと、タッピングネジ１８により固定面５をＣ形鋼ウエブ９に固定するだけの簡単な操作で溶接を行なうことなく取付けることができ、作業の安全性と能率の向上、経費の削減を期待することができる。
【図面の簡単な説明】
【図１】本発明に係るＣ形鋼接続用金物の構成を示す斜視図。
【図２】Ｃ形鋼接続用金物をＣ形鋼に取付けた状態の斜視図。
【図３】Ｃ形鋼接続用金物の側面図。
【図４】Ｃ形鋼接続用金物の正面図。
【図５】図３のＶ−Ｖ線から見た連結面の正面図。
【図６】図３のＶＩ−ＶＩ線から見た支承面の正面図。
【図７】Ｃ形鋼接続用金物をＣ形鋼内に取付けるための操作を示す斜視図。
【図８】図７の次の操作により、Ｃ形鋼接続用金物がＣ形鋼内に配置された固定前の状態の断面図。
【図９】Ｃ形鋼接続用金物をタッピングネジによりＣ形鋼内に固定した状態の断面図。
【図１０】本発明に係るＣ形鋼接続用金物の別の実施例における形状を示す斜視図。
【図１１】本発明のＣ形鋼接続用金物の先行技術を示す斜視図。
【符号の説明】
１：Ｃ形鋼
２：接続用金物
３：溝開口面
３ａ，３ｂ：溝開口面両側辺
４：連結面
４ａ：連結面基端側
４ｂ：連結面突出側
５：固定面
６：支承面
６ａ：支承面上端縁
７１，７２：切込み溝
７ａ：切込み溝上縁
７ｂ_１：切込み溝内奥側下縁
７ｂ_２：切込み溝入口側下縁
８ａ，８ｂ：段
９：Ｃ形鋼ウエブ
１０ａ，１０ｂ：連結面基端側側縁
１１ａ，１１ｂ：固定面側縁
１２ａ，１２ｂ：支承面側縁
１３：段
１４：配線用貫通孔
１５：ボルト孔
１６：タッピングネジ挿通孔
１７：配線用切欠き部
１８：タッピングネジ[0001]
BACKGROUND OF THE INVENTION
The present invention simply and reliably connects a C-shaped steel and a C-shaped steel used as a steel frame material of a building structure, or a C-shaped steel and another steel material at a desired position without the need for welding. It is related with the improvement of the metal for C-shaped steel connection which can be performed.
[0002]
[Prior art]
Various types of conventional C-shaped steel connection hardware are known. As an example, a caul plate is disposed inside the groove opening surface of the C-shaped steel, and the groove opening surface Applying an L-shaped connecting member having a connecting surface to be connected to another steel material on the outside, connecting the inner plate of the groove opening surface and the outer connecting member with bolts and nuts, Japanese Patent Application Laid-Open No. H8-42002 discloses a C-shaped steel connection hardware having a structure in which another steel material can be connected to the connecting surface of an L-shaped connection member.
[0003]
Further, as shown in FIG. 11, a connecting surface having a width A1 that is substantially the same as the width R of the C-shaped steel 30 and a predetermined length B that protrudes from the inside of the C-shaped steel 30 to the outside of the groove opening surface 31 at a right angle. 24, a fixed surface 25 forming a surface perpendicular to the connecting surface 24 in the C-shaped steel 30, and a shorter length than the connecting surface 24 extending in parallel to the connecting surface from the fixed surface 25 in the same direction. C-shaped steel connecting hardware having a bearing surface 26 and provided with cut grooves 27 and 27 into which both side sides 31a and 31b of the groove opening surface 31 of the C-shaped steel 30 are inserted at the center of both side edges of the connecting surface 24. No. 20 has been proposed by the present applicant as Japanese Patent Laid-Open No. 11-269983.
[0004]
The C-shaped steel connecting hardware 20 was inserted into the C-shaped steel 30 with the fixing surface 25 and the support surface 26 of the connecting surface 24 parallel to the longitudinal direction of the C-shaped steel groove opening surface 31 when mounting. After that, the connecting surface 24 is rotated 90 degrees in the clockwise direction so that both side edges 31a and 31b of the C-shaped steel groove opening surface 31 are inserted into both side edge cut grooves 27 and 27 of the connecting surface 24, and the fixing surface 24 is screwed. It is fixed to the C-shaped steel web 39 by 28 or the like.
[0005]
[Problems to be Solved by the Invention]
As described above, among the conventional C-shaped steel connection hardware, in the connection hardware disclosed in Japanese Patent Laid-Open No. 8-42002, the inner side of the groove opening surface and the outer L-shaped connection member are connected to the bolt / Since it is a structure that is tightened integrally with a nut, when installing it, place a backing plate through which the bolt has been inserted in advance inside the groove opening surface, and insert the bolt into the groove opening surface with the hand. If the head part is not pressed down, the L-shaped connecting member cannot be attached outside the groove opening surface, and there is a problem that the nut cannot be screwed onto the bolt, and it is inserted into the groove opening surface in a narrow space. The problem is that the work is troublesome because the holding plate must be held by the hand and the work is not efficient.
[0006]
On the other hand, among the conventional C-shaped steel connecting hardware, in the connecting hardware 20 disclosed in Japanese Patent Laid-Open No. 11-269983, a base end side 24a having a coupling surface 24, a fixing surface 25, and a bearing surface 26 is provided for mounting. Is inserted into the C-shaped steel 30 in a direction parallel to the longitudinal direction of the C-shaped steel groove opening surface 31, and then the connecting surface 24 is rotated 90 degrees in the clockwise direction to cut both side edge cut grooves 27 of the connecting surface 24. , 27 are inserted into both sides 31a and 31b of the C-shaped steel groove opening surface 31 and the fixing surface 25 is fixed to the C-shaped steel web 39 with screws 28 or the like, so that the connecting hardware 20 is opened to the groove of the C-shaped steel 30. Since it can project outward from the surface 31, it has the advantage that the attachment work of the connection hardware can be performed efficiently.
[0007]
However, in the above-described connection hardware 20, the connecting surface 24 perpendicular to the length direction of the C-shaped steel can be easily projected outside the C-shaped steel groove opening surface 31, so that when assembling the steel frame, After an operator attaches the connecting hardware 20 to the outside of the C-shaped steel groove opening surface 31, and before connecting another C-shaped steel to the connecting surface 24, the operator puts his feet on the connecting surface 24 of the connecting hardware 20. Connecting hardware may be used instead of a scaffolding so that it can be hung and climbed by a steel frame or supported by the body.
[0008]
When the metal fitting for handling is handled as described above, the metal fitting is attached to the base end side 24a having the connecting surface 24, the fixing surface 25, and the bearing surface 26 in the longitudinal direction of the C-shaped steel groove opening surface 31. It is inserted into the C-shaped steel in a direction parallel to the direction, and the connecting surface 24 is rotated 90 degrees so that the connecting surface 24 is arranged in a direction perpendicular to the length direction of the C-shaped steel groove opening surface 31 and fixed. Since the surface 25 is fixed to the C-shaped steel web 39 with the screw 28 or the like, when the foot is put on the protruding connecting surface 24, the connecting surface 24 rotates around the screw 28 of the fixing surface 25 as the body moves. There is a risk that the fixing portion between the screw 28 and the C-shaped steel web 39 is loosened, and the connection hardware 20 falls off from the C-shaped steel 1.
[0009]
[Means for Solving the Problems]
In the present invention, in a state where the connection hardware disclosed in the above-mentioned JP-A-11-269993 is attached to the C-shaped steel, an operator temporarily uses it instead of a scaffold, climbs on a connecting surface, Even if the body is supported, the fixing part by the screw on the fixing surface does not loosen, it is easy to install, and it can maintain a secure fixed state and provide a highly safe C-shaped steel connection hardware It is.
[0010]
The invention of claim 1 is a connecting surface having a predetermined width projecting outward from the groove opening surface at right angles from the inside of the C-shaped steel as a specific means for that purpose, A fixing surface forming a surface perpendicular to the connecting surface in the C-shaped steel, and a support surface having a shorter length than the connecting surface extending in parallel with the connecting surface from the fixing surface; A C-shaped steel connecting hardware provided with notches into which both sides of a C-shaped steel groove opening surface are inserted at the center of both side edges of the connecting surface, and a base provided with a fixing surface and a bearing surface of the connecting surface After inserting the end side into the C-shaped steel with the direction parallel to the longitudinal direction of the C-shaped steel groove opening surface, the connecting surface is rotated 90 degrees and the C-shaped steel groove opening surface is formed in the cut grooves on both side edges of the connecting surface. In the C-shaped steel connecting hardware that inserts both sides of the cable and fixes the fixed surface to the C-shaped steel web with screws, etc. At the lower edge of the fixed groove side of the cut groove, a step is formed so that the groove width of each of the cut grooves is wide on the inlet side of the groove and narrowed on the inner back side. The interval between the steps is a length that fits within the opening width on both sides of the C-shaped steel groove opening surface.
[0011]
According to a second aspect of the present invention, in the first aspect of the invention, the height from the fixed surface to the upper end edge of the bearing surface is the same as the height position of the lower edge on the inlet side of the connecting surface cutting groove, and the upper end The edge is provided with a step symmetrical to the step of any one of the cut grooves on the base end side of the connecting surface.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The structure of the C-shaped steel connecting hardware according to the present invention will be described with reference to the embodiment shown in the drawings. FIG. 1 is a perspective view showing the shape of the C-shaped steel connecting hardware 2. FIG. 2 is a perspective view of a horizontally disposed C-shaped steel 1 and a connecting hardware 2 attached to the C-shaped steel 1. The connecting hardware 2 bends a metal plate having a predetermined thickness. Thus, a connecting surface 4 having a width A1 that is substantially the same as the inner width R of the C-shaped steel 1 and a predetermined length B that protrudes from the C-shaped steel 1 to the outside of the groove opening surface 3 at a right angle; A fixed surface 5 that forms a surface perpendicular to the connecting surface 4 in the section steel 1, and a support surface 6 that is shorter than the connecting surface 4 that extends in parallel to the connecting surface from the fixed surface 5. It has.
[0013]
The connecting surface 4 is provided with horizontal cut grooves 71 and 72 for inserting both side edges 3a and 3b of the groove opening surface 3 of the C-shaped steel 1 at the center of both side edges. Are divided into a base end side 4a having a fixing surface 5 and a bearing surface 6 below and a projecting side 4b projecting outward of the C-shaped steel groove opening surface 3 above the grooves 71 and 72.
[0014]
The length D1 of the base end side 4a, that is, the distance D1 between the lower surface of the fixed surface 5 and the upper edge 7a of the cut grooves 71 and 72 is equal to the inner surface of the web 9 in the C-shaped steel 1 and both sides of the groove opening surface 3. The length D1 of the base end side 4a and the length of the projecting side 4b projecting to the outside of the C-shaped steel groove opening surface 3 are equal to or slightly larger than the length S between the upper surfaces of the sides 3a and 3b. The entire length B of the connecting surface 4 is formed by D2.
[0015]
As shown in FIG. 1, the cut grooves 71 and 72 provided at the center portions of both side edges of the connecting surface 4 are C-shaped steel grooves cut horizontally from the both side edges of the connecting surface 4 toward the inside of the surface. A common length E is provided so that both sides 3a and 3b of the opening surface 3 can be fitted, and any one of the cut grooves, for example, the groove 71 has a common length E of 0.5. The length En is set to be about twice as large.
[0016]
The groove width of the notches 71 and 72, in the innermost side of both grooves 71 and 72, both sides 3a of the C-shaped steel groove opening surface 3 between the upper edge 7a and the innermost lower edge 7b ₁ , 3b can be inserted therethrough, but on the inlet side of the grooves 71, 72, the gap between the upper edge 7a and the inlet side lower edge 7b ₂ is the inner depth groove width F. It is set to 2 times a wide groove width G, respectively stage 8a between the inlet-side lower edge 7b ₂ and innermost lower edge 7b _1, 8b are provided.
[0017]
Each of the steps 8a and 8b is provided at a position of an equal length H that enters from the inlet side on both sides of the connecting surface protruding side 4b to the inner back side, and one of these steps 8a and the other step 8b. Is set to such a length as to fit within the opening width T of the side sides 3a, 3b of the C-shaped steel groove opening surface 3.
[0018]
Further, the base end side 4a below the connecting surface 4 is cut to the left or right side edge 10a, for example, the side edge on the side where the long cut groove 71 is provided, so that the lateral width A2 is increased. Is set to be shorter than the lateral width A1 of the protruding side 4b.
[0019]
On the other hand, the fixed surface 5 provided below the connection surface 4 has a gap M between the connection surface 4 and the support surface 6 set to be smaller than the opening width T of the C-shaped steel groove opening surface 3, and is shown in FIG. Thus, when this connecting hardware is mounted in the C-shaped steel 1, the connecting surface base end side 4a is oriented so that the connecting surface 4 is parallel to the length direction of the C-shaped steel groove opening surface 3, and the groove opening surface The size is set such that when it is fitted in the C-shaped steel 1, it can be fitted with a margin.
[0020]
The lateral width N of the fixed surface 5 is such that one side edge 11a extends on the same line as the short cut side edge 10a of the connection surface base end side 4a, and the other side edge 11b is the connection surface base end side. By being cut so as to be shorter inward than the side edge 10b of 4a, it is set to be shorter than the lateral width A2 of the connecting surface base end side 4a.
[0021]
Further, the support surface 6 provided at the tip of the fixed surface 5 protrudes so that one side edge 12a protrudes outside the side edge 11a of the fixed surface 5, and the other side edge 12b is the fixed surface. 5, the length between the side edges 12a and 12b is the same as the lateral width A2 of the connecting face base end side 4a. It is a size.
[0022]
Height Q from the fixed surface 5 of the bearing surface 6 to the upper end edge 6a is the same height as the lower edge 7b ₂ at the inlet side of the notches 71 and 72 provided in the coupling surface 4, the upper edge 6a is provided with a step 13 symmetrical to the step 8a of any one of the cut grooves 71 or 8b of the other cut groove 72 on the connecting surface base end side 4a.
[0023]
A wiring through hole 14 is provided at the central portion of the connecting surface base end side 4a, and a bolt hole 15 used for connection with another C-shaped steel or steel frame is provided at the central portion of the connecting surface protruding side 4b. 5 is provided with a tapping screw insertion hole 16, and a semicircular wiring cutout portion 17 communicating with the wiring through hole 14 on the base end side 4 a is provided at the center of the upper end edge 6 a of the support surface 6. It has been. The number of tapping screw insertion holes 16 in the fixed surface 5 may be one, but it is preferable to provide about two.
[0024]
The C-shaped steel connecting hardware 2 of the present invention has the above-described structure, and when attached to the C-shaped steel 1, as shown in FIG. 7, the connecting surface base end side 4 a, the fixed surface 5, and the bearing surface 6 Is fitted into the groove opening surface 3 in a direction parallel to the length direction of the C-shaped steel groove opening surface 3, and then the whole is rotated 90 degrees in the clockwise direction.
[0025]
When the connecting hardware 2 is rotated in the C-shaped steel 1, one side 3 a of the groove opening surface 3 of the C-shaped steel 1 is inserted into the cut groove 71 having the longer connecting surface 4. Thus, the rotation can be continued, and the side edge 10a of the connecting surface proximal end 4a which is the front side in the rotation direction and the side edge 12b of the bearing surface 6 which is diagonal to the connecting surface proximal end side edge 10a are cut short. As a result, the hardware 2 can rotate in the C-shaped steel 1 without any problem, and finally the both-side cut grooves 71 and 72 of the connecting surface 4 are formed into the C-shaped steel groove opening surface 3 as shown in FIG. The connecting surface protruding side 4b is rotated to a direction perpendicular to the longitudinal direction of the C-shaped steel groove opening surface 3.
[0026]
In order to fix the connection hardware 2 to the C-shaped steel 1 in this state, as shown in FIG. 8, tapping screws 18 are inserted into the left and right screw insertion holes 16 formed in the fixing surface 5, 1 bite into the inner surface of the web 9.
[0027]
As shown in FIG. 9, when the tapping screw 18 is passed through the screw insertion hole 16 of the fixed surface 5 and its tip is bitten into the surface of the C-shaped steel web 9, a female screw is formed on the inner periphery of the screw insertion hole 16. Then, the fixed surface 5 is lifted in the C-shaped steel 1 by a gap having a wide groove width G on the inlet side of the cut grooves 71 and 72, and the connection hardware 2 finally becomes the lower edge on the inlet side of the cut grooves 71 and 72. 7b ₂ will rise to the height position where it contacts the back surfaces of the C-shaped steel groove opening side both sides 3a and 3b.
[0028]
In the state where the inlet-side lower edge 7b ₂ of the cut grooves 71 and 72 rises to a height position in contact C-shaped steel groove opening face both sides 3a, the back surface of the 3b, the inlet side of a cut groove 71 and 72 stage 8a which is provided between the edge 7b ₂ and innermost lower edge 7b _1, 8b is, a state in which both fitted C-shaped steel groove opening face both sides 3a, 3b into the groove opening width in T of Therefore, the connecting hardware 2 will not rotate in either the left or right direction within the C-section steel 1, and the connection with the C-section steel 1 can be reliably achieved unless the clamping force to the C-section steel web 9 by the tapping screw 18 is loosened. It will be fixed to.
[0029]
The connection hardware 2, stage 8a between the inlet-side lower edge 7b ₂ and innermost lower edge 7b ₁ in notches 71 and 72, is provided with the 8b, these stages 8a, 8b is C-shaped steel 1 can be fixed so as not to rotate in the C-shaped steel 1 by being fitted into the groove opening width T of one, but either one of the cut grooves in the connecting surface 4 is also formed on the upper end edge 6a of the bearing surface 6. By providing the step 13 symmetrical to the step 8a of 71 or the 8b of the other cut groove 72, the step 13 of the bearing surface 6 is locked to the edge of one C-shaped steel groove opening side 3a or 3b. Thus, the engagement between the connecting surface 4 and the steps 8a, 8b and 13 of the bearing surface 6 and the C-shaped steel groove opening width T makes the rotation of the connecting hardware 2 more reliable.
[0030]
In the above embodiment, as shown in FIG. 1, as the shape of the connection hardware 2, the left side edge 10a of the connecting surface base end side 4a and the right side of the support surface 6 positioned diagonally to this side edge 10a. Although the shape which cut | disconnected the edge 12b was described, like the metal object 2 of another Example shown in FIG. 10, the side edge 10b of the right side of the connection surface base end side 4a, and the bearing surface located on the diagonal with this 6 and the left side edge 12a may be cut. In this case, it can be attached to the C-shaped steel 1 by rotating in the C-shaped steel 1 in the counterclockwise direction.
[0031]
【The invention's effect】
The connection hardware of the present invention, between the inlet-side lower edge 7b ₂ and innermost lower edge 7b ₁ in notches 71, 72 of the connecting surfaces 4, spacing to fit into the C-shaped steel groove opening width T Since the steps 8a and 8b are provided, when the fixing surface 5 is pulled away from the C-shaped steel web 9 by the tapping screw 18, the steps 8a and 8b of the cut grooves 71 and 72 become the C-shaped steel groove opening width T. It is possible to prevent the rotation within the C-shaped steel by being fitted into the inside of the C-shaped steel. Therefore, when assembling the steel frame, the connecting hardware 2 attached by the operator is used instead of the scaffold, and the connecting surface protrudes. Even if the side 4b is put on and climbed or the body is supported, the connecting surface 4 can be prevented from rotating in the C-shaped steel, and the safety of work can be improved.
[0032]
Further, the connecting hardware is simply fitted into the C-shaped steel 1 in parallel with the groove opening surface 3 and then rotated, and the fixing surface 5 is simply fixed to the C-shaped steel web 9 by the tapping screw 18. It can be installed without welding by operation, and it can be expected to improve the safety and efficiency of work and reduce the cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a C-shaped steel connection hardware according to the present invention.
FIG. 2 is a perspective view of a state in which a C-shaped steel connecting hardware is attached to a C-shaped steel.
FIG. 3 is a side view of a C-shaped steel connection hardware.
FIG. 4 is a front view of a C-shaped steel connection hardware.
FIG. 5 is a front view of a connecting surface viewed from the line VV in FIG. 3;
6 is a front view of the bearing surface as viewed from line VI-VI in FIG. 3;
FIG. 7 is a perspective view showing an operation for attaching a C-shaped steel connecting hardware to the C-shaped steel.
FIG. 8 is a cross-sectional view of a state before fixation in which the C-shaped steel connection hardware is arranged in the C-shaped steel by the next operation of FIG. 7;
FIG. 9 is a cross-sectional view showing a state in which a C-shaped steel connection hardware is fixed in the C-shaped steel with a tapping screw.
FIG. 10 is a perspective view showing the shape of another embodiment of the C-shaped steel connection hardware according to the present invention.
FIG. 11 is a perspective view showing a prior art of a C-shaped steel connecting hardware according to the present invention.
[Explanation of symbols]
1: C-shaped steel 2: Metal fitting for connection 3: Groove opening surface 3a, 3b: Both sides of groove opening surface 4: Connection surface 4a: Connection surface proximal side 4b: Connection surface protruding side 5: Fixed surface 6: Bearing surface 6a : Bearing surface upper edge 71, 72: Cut groove 7a: Cut groove upper edge 7b ₁ : Cut groove inner side lower edge 7b ₂ : Cut groove inlet side lower edge 8a, 8b: Step 9: C-shaped steel webs 10a, 10b: Connection surface base side edge 11a, 11b: Fixed surface side edge 12a, 12b: Bearing surface side edge 13: Step 14: Wiring through hole 15: Bolt hole 16: Tapping screw insertion hole 17: Wiring notch 18 : Tapping screw

Claims

A connecting surface having a width substantially the same as the width of the C-shaped steel and a predetermined length protruding outward from the groove opening surface at a right angle from the inside of the C-shaped steel, and a surface perpendicular to the connecting surface in the C-shaped steel is formed. And a bearing surface having a shorter length than the connecting surface extending in parallel with the connecting surface from the fixing surface, and a groove opening of C-shaped steel at the center of both side edges of the connecting surface. It is a C-shaped steel connection hardware provided with cut grooves into which both sides of the surface are inserted, and the base end side including the fixed surface and the bearing surface of the connecting surface is parallel to the longitudinal direction of the C-shaped steel groove opening surface. After inserting into the C-shaped steel in the desired direction, the connecting surface is rotated by 90 degrees, the both sides of the C-shaped steel groove opening surface are inserted into the cut grooves on both side edges of the connecting surface, and the fixing surface is fixed with a screw or the like. In the C-section steel connection hardware fixed to the shape steel web,
At the lower edge of the fixed groove side of the cut groove on both side edges of the connecting surface, a step is formed so that the groove width of each of these cut grooves is wide on the inlet side of the groove and narrowed on the inner back side, and is formed into a two-stage shape. A metal fitting for C-shaped steel connection, characterized in that the interval between the steps in the cut groove is set to fit within the opening width on both sides of the C-shaped steel groove opening surface.

The height from the fixed surface to the upper end edge of the bearing surface is the same as the height position of the lower edge on the inlet side of the connecting surface cutting groove, and this upper end edge includes either one of the connecting surface proximal end side. The metal fitting for C-shaped steel connection according to claim 1, wherein a step symmetrical to the step of the cut groove is provided.