JP3621508B2

JP3621508B2 - Columns / joint joints and joint structures of different diameter steel pipe columns

Info

Publication number: JP3621508B2
Application number: JP13442696A
Authority: JP
Inventors: 章福田
Original assignee: Daiwa House Industry Co Ltd
Current assignee: Daiwa House Industry Co Ltd
Priority date: 1996-04-30
Filing date: 1996-04-30
Publication date: 2005-02-16
Anticipated expiration: 2016-04-30
Also published as: JPH09296513A

Description

【０００１】
【発明の属する技術分野】
この発明は、管径が異なる上下の鋼管柱を接合するのに用いる柱・柱接合金物、およびその接合金物を用いた異径鋼管柱の柱・柱接合構造に関する。
【０００２】
【従来の技術】
従来、管径の異なる上下の鋼管柱を接合する場合、柱の絞りは一般に図１０に示すように、柱・梁の接合部で行っている。すなわち、上下の鋼管柱１０１，１０２の間に、ダイヤフラム１０４，１０５を介してテーパ状筒１０３を溶接し、前記ダイヤフラム１０４，１０５に梁１０６の上下フランジ１０６ａ，１０６ｂを溶接している。梁１０６は、テーパ状筒１０３の側面に沿うように端部を斜めに切断し、かつ上下フランジ１０６ａ，１０６ｂの先端を、上下の互いに大きさの異なるダイヤフラム１０４，１０５の端面に突き合わせられる寸法に加工している。
【０００３】
【発明が解決しようとする課題】
このように、従来は上下の鋼管柱１０１，１０２間に、ダイヤフラム１０４，１０５を介してテーパ状筒１０３を溶接しているため、テーパ状筒１０３やダイヤフラム１０４，１０５の加工量が多くなるばかりか、加工も容易でなく、コスト高になる。また、柱・柱接合は現在は同一サイズのものを、治具を使用して現場溶接しているため、品質管理も容易でない。さらに、柱の絞りを柱・梁接合部で行っているため、梁１０６の端部を柱の絞り形状に合うように加工する必要があり、この点からも加工が複雑となりコスト高になるという問題点があった。また、柱・梁の接合部は大きな力が複雑に作用する箇所であるため、溶接の品質を高品質に保つ必要があり、このことからも品質管理が容易でない。
【０００４】
この発明は、このような課題を解消し、管径の異なる上下鋼管柱を、簡単な構造で容易に接合でき、品質管理も容易な異径鋼管柱の柱・柱接合金物および柱・柱接合構造を提供することを目的とする。
【０００５】
【課題を解決するための手段】
この発明の異径鋼管柱の柱・柱接合金物は、直管部の上方に管径が上端側へ次第に窄まる絞り部を有し、この絞り部の上面の周囲に嵌合用突壁を有する鋳鋼製の下側金物と、この下側金物の前記嵌合用突壁の外周に下端が嵌合して前記下側金物に突き合わせ溶接等で溶接された鋼管製の上側金物とからなる。前記下側金物および上側金物の周壁にはボルト挿通孔を設ける。
この柱・柱接合金物によれば、管径の異なる上下の鋼管柱を、添え板等と共にボルト接合することができる。そのため、現場溶接が不要で、信頼性の高い接合が行える。柱・柱接合金物の下側金物と上側金物とは溶接で接合するが、工場溶接できるため、溶接品質の管理が容易である。また、この柱・柱接合金物は、鋼管と鋳造品とを組み合わせたものであるため、鋳造品の形状が比較的簡素で簡単に鋳造が行え、また高価な鋳鋼の使用量も少なくて済み、これらにより低コストで製造できる。
【０００６】
前記柱・柱接合金物において、前記下側金物および上側金物を角筒状とし、前記絞り部を、上端の一つの角部が直管部の角部と一致するように窄まるものとしてもよい。この構成の場合、建物外周の角部の位置における異径の角形鋼管柱の接合に使用して、建物の外壁面を、上下の柱径の差にかかわらずに同一平面に仕上げることが容易となる。
また、前記下側金物および上側金物を角筒状とし、前記絞り部を、上端の一辺が直管部の断面の一辺と一致するように窄まるものとしてもよい。この構成の場合、建物外周の中間位置における異径の角形鋼管柱の接合に使用して、建物の外壁面を、上下の柱径の差にかかわらずに同一平面に仕上げることが容易となる。
また、前記下側金物の上端に、内周へ突出する補強フランジを設けてもよい。このように補強フランジを設けることで、応力集中の生じ易い柱径の変化部分の強度が増し、堅固な異径鋼管柱に仕上げることができる。また、下側金物の上端を閉鎖断面にするものと異なり、補強フランジの内周に形成される開口がボルト接合時に作業用開口に利用できる。
【０００７】
この発明の異径鋼管柱の柱・柱接合構造は、前記柱・柱接合金物を用いた柱・柱接合構造であって、前記下側金物と同径の下側鋼管柱と、前記上側金物と同径の上側鋼管柱との間に前記柱・柱接合金物を介在させ、前記下側金物と下側鋼管柱とを添え板と共にボルト接合し、前記上側金物と上側鋼管柱とを他の添え板と共にボルト接合し、前記柱・柱接合金物の配置高さを、前記上下の鋼管柱の継がれた異径鋼管柱に接合される梁の位置から外したものである。
この構成によれば、柱・柱接合金物によって柱径を絞る位置を梁の接合位置から外したため、梁端部の形状を柱の絞り形状に合わせて加工する必要がなく、加工量が少なくて済む。また、前記構成の柱・柱接合金物の使用により、現場溶接が不要で、信頼性の高い柱・柱接合構造とできる。
【０００８】
この発明の請求項６記載の異径鋼管柱の柱・柱接合金物は、上下面に環状の嵌合用突壁を有し、上面の嵌合用突壁を下面の嵌合用突壁よりも小径とした鋳鋼製の中間金物と、上端が前記中間金物の下面の嵌合用突壁に嵌合してこの中間金物に溶接された鋼管製の下側金物と、下端が前記中間金物の上面の嵌合用突壁に嵌合してこの中間金物に溶接された鋼管製の上側金物とからなる。下側金物および上側金物の周壁にはボルト挿通孔を設ける。
この構成の柱・柱接合金物も、管径の異なる上下の鋼管柱を添え板等と共にボルト接合することができ、現場溶接が不要で、信頼性の高い接合が行える。また、この柱・柱接合金物は、鋳鋼製の中間金物の上下に鋼管製の上側金物および下側金物を設け、管径が変化する部分だけを鋳鋼製としたため、安価な鋼管を多く使用することができて、さらに鋳鋼の使用量が少なくて済み、材料コストが一層低減する。
【０００９】
前記柱・柱接合金物において、前記中間金物を、上面に嵌合用突壁よりも若干小径の開口を有するものとしてもよい。この構成の場合、ボルト接合時に、前記中間金物の開口より手を入れてボルト接合できるので、その接合作業を容易に行うことができる。
また、前記下側金物および上側金物を角筒状とし、互いに一つの角部の位置が一致するようにしてもよい。この構成の場合、建物外周の角部の位置での異径の角形鋼管柱の接合に使用して、建物の外壁面を同一平面に仕上げることが容易となる。
また、前記下側金物および上側金物を角筒状とし、互いに一つの辺の位置が一致するようにしてもよい。この構成の場合、建物外周の中間位置での異径の角形鋼管柱の接合に使用して、建物の外壁面を同一平面に仕上げることが容易となる。
【００１０】
この発明の請求項１０記載の異径鋼管柱の柱・柱接合構造は、中間金物、上側金物および下側金物からなる前記柱・柱接合金物を用いた柱・柱接合構造であって、前記下側金物と同径の下側鋼管柱と、前記上側金物と同径の上側鋼管柱との間に前記柱・柱接合金物を介在させ、前記下側金物と下側鋼管柱とを添え板と共にボルト接合し、前記上側金物と上側鋼管柱とを他の添え板と共にボルト接合し、前記柱・柱接合金物の配置高さを、前記上下の鋼管柱の継がれた異径鋼管柱に接合される梁の位置から外したものである。
この構成の場合も、柱・柱接合金物によって柱径を絞る位置を梁の接合位置から外したため、梁端部の形状を柱の絞り形状に合わせて加工する必要がなく、加工量が少なくて済む。また、前記構成の柱・柱接合金物の使用により、現場溶接が不要で、信頼性の高い柱・柱接合構造とできる。
【００１１】
【発明の実施の形態】
この発明の一実施形態を図１ないし図５と共に説明する。この実施形態に係る異径鋼管柱の柱・柱接合金物１は、図１のように鋳鋼製で角筒状の下側金物３と、下端が前記下側金物３に突き合わせ溶接された鋼管製で角筒状の上側金物２とからなる。
下側金物３は、直管部３ａの上方に管径が上端側に次第に窄まる絞り部３ｂを有するものであり、絞り部３ｂの上面の周囲に嵌合用突壁３ｃが形成されている。この絞り部３ｂは、図１（Ａ）で示すように上端の一つの角部が直管部３ａの角部と一致するように窄まる２方絞りの形状であり、その周壁は直管部３ａの周壁より若干厚肉としてある。また、絞り部３ｂの周壁の内面はテーパ面とされ、外面のうち上側金物２からずれた部分も内面と略平行なテーパ面とされている。下側金物３の上端には、中心の円形の開口４を残して内側へ突出する補強フランジ３ｄが設けられている。これにより、柱・柱接合金物１の強度が一層向上する。開口４の形状は、円形に限らず、種々の形状とでき、四角形等としてもよい。また、開口４は、強度が確保できる範囲で大きいほどよい。すなわち、補強フランジ３ｄは、最小限のものでよい。これにより、コスト低下が図れる。また、絞り部３ｂの上面の前記嵌合用突壁３ｃの外側部分は外側に向かって下降傾斜する開先用テーパ面３ｂ_１としてある。下側金物３の直管部３ａの周壁の四面には複数のボルト挿通孔６が縦方向に２列に形成されている。
前記上側金物２は、その下端が前記下側金物３の前記嵌合用突壁３ｃに嵌合して前記突き合わせ溶接が行われる。その溶接は、上側金物２の下端と、下側金物３における前記絞り部３ｂの開先用テーパ面３ｂ_１とで囲まれる凹部を開先として行われる。この上側金物２の周壁の四面にも複数のボルト挿通孔５が形成されている。
前記柱・柱接合金物１は、図５に示す建物の外周において、その角部に位置する異径鋼管柱の接合に使用され、建物内部側が窄まるように配置される。これにより、異径鋼管柱の管径に変化にかかわらずに、建物の外壁面を同一平面に仕上げることが容易となる。
【００１２】
この柱・柱接合金物１は、鋼管と鋳鋼品を組み合わせて溶接した構造であるため、鋳造部分の構成が簡単で、また高価な鋳鋼の使用量が少なくて済む。このため低コストで製造できる。この柱・柱接合金物１内にはコンクリートを充填してもよく、その場合、補強フランジ３ｄは、コスト的にも構造的にも小さい方がよい。
【００１３】
図２は、図１の柱・柱接合金物１を用いた柱・柱接合構造を示す。この柱・柱接合構造は、下側金物３と同径の角形の下側鋼管柱８と、前記柱・柱接合金物１の上側金物２と同径の角形の上側鋼管柱７とを、前記柱・柱接合金物１を介してボルト接合したものである。下側鋼管柱８の上端および上側鋼管柱７の下端の各四面には、予め複数のボルト挿通孔が各々形成されている。
前記柱・柱接合金物１の上側金物２と上側鋼管柱７の下端、および柱・柱接合金物１の下側金物３と下側鋼管柱８の上端とは、それぞれ添え板９，１０を介してボルト接合される。これにより上下鋼管柱７，８が継がれ、異径鋼管柱１４とされる。
上側鋼管柱７の下端の各表面から柱・柱接合金物１の上側金物２の各表面に跨がって配置される４枚の上側添え板９には、上側鋼管柱７のボルト挿通孔（図示せず）に整合する複数のボルト挿通孔（図示せず）と、柱・柱接合金物１の上側金物２のボルト挿通孔５に整合する複数のボルト挿通孔（図示せず）とが形成されている。
また、前記柱・柱接合金物１の下側金物３の各表面から下側鋼管柱８の上端の各表面に跨がって配置される４枚の下側添え板１０にも、下側金物３のボルト挿通孔６に整合する複数のボルト挿通孔（図示せず）と、下側鋼管柱８の上端のボルト挿通孔（図示せず）に整合する複数のボルト挿通孔（図示せず）とが形成されている。
なお、添え板９，１０は、この例では鋼管柱８，９の外面のみに配置する１面剪断の摩擦ボルト接合とする場合につき説明したが、内外両面に添え板を配置する２面剪断の摩擦ボルト接合としても良い。これにより、ボルト本数を少なくでき、また部品の高さを低くできて、部品コストが削減できる。
【００１４】
下側鋼管柱８の上端と柱・柱接合金物１の下側金物３とを先にボルト接合する場合には、作業者が柱・柱接合金物１の下側金物３の円形開口４から下側金物３内に手を差し込んで、下側金物３のボルト挿通孔６から下側添え板１０のボルト挿通孔にわたって、さらに下側鋼管柱８のボルト挿通孔から下側添え板１０のボルト挿通孔にわたって、それぞれトルシア型の高力ボルト１１を挿通させ、この高力ボルト１１により下側添え板１０を柱・柱接合金物１の下側金物３に締め付け固定すると共に、下側添え板１０を下側鋼管柱８の上端に締め付け固定する。これにより、下側鋼管柱８の上端と、柱・柱接合金物１の下側金物３とのボルト接合が行われる。
【００１５】
上側鋼管柱７の下端と柱・柱接合金物１の上側金物２とのボルト接合は、上側添え板９のボルト挿通孔から上側鋼管柱７の対応するボルト挿通孔にわたってワンサイドボルト１２を貫通させ、上側添え板９を上側鋼管柱７の下端に締め付け固定すると共に、上側添え板９のボルト挿通孔から柱・柱接合金物１の上側金物２の対応するボルト挿通孔５にわたってワンサイドボルト１２を貫通させ、上側添え板９を柱・柱接合金物１の上側金物２に締め付け固定することにより行われる。前記ワンサイドボルト１２は、一端側の操作で他端に頭部が拡径状態に塑性変形されて締め付けが行える軸状締め付け具であり、ブラインドボルトとも呼ばれる。
【００１６】
上側鋼管柱７の下端と、柱・柱接合金物１の上側金物２とのボルト接合を先に行う場合には、そのボルト接合にトルシア型の高力ボルト１１を使用し、その作業において上側金物２内に手を差し込むのに下側金物３の円形開口４を利用する。下側鋼管柱８の上端と、柱・柱接合金物１の下側金物３とのボルト接合にはワンサイドボルト１３を使用する。また、上側鋼管柱７の下端と柱・柱接合金物１の上側金物２とのボルト接合、および下側鋼管柱８の上端と柱・柱接合金物１の下側金物３とのボルト接合を、共にワンサイドボルト１３で行ってもよい。また、鋼管柱内面等に溶接ナット等を使用することにより、全て通常の高力ボルトを使用して接合することもできる。
【００１７】
柱・柱接合金物１の配置高さは、前記上下の鋼管柱７，８の継がれた異径鋼管柱１４に接合される梁１５の位置から外した位置とされる。これにより、梁１５の端部を特殊な形状に加工することなく、均一口径の例えば下側鋼管柱８に簡単に接合できる。ここでは、下側鋼管柱８の途中に設けた上下のダイヤフラム１６ａ，１６ｂに、梁１５の端部を構成するブラケットの上下フランジ１５ａ，１５ｂを突き合わせ溶接するようにしている。梁１５はエンドプレートを設けてボルト接合し、またはスプリットティー等の金具等を用いてボルト接合しても良い。
【００１８】
この柱・柱接合構造によると、現場では溶接作業が要らず、ボルト接合作業だけで異径鋼管柱１４を接合できる。柱・柱接合金物１の製作時には溶接が必要であるが、工場で行うので、溶接作業や溶接品質の管理が容易に行える。これらにより、信頼性の高い柱・柱接合が行える。なお、異径鋼管柱１４内の全体または柱・柱接合金物１内に、コンクリートを充填してもよい。
【００１９】
図３は、図１の構成において、前記下側金物３の絞り部３ｂを、上端の一辺が直管部３ａの断面の一辺と一致するように窄まる３方絞り形状とした柱・柱接合金物１Ａの例を示す。その他の構成は図１の例と同様である。この構成の柱・柱接合金物１Ａは、図５に示す建物外周の中間位置での異径鋼管柱の接合に使用する。これにより、柱径の変形部の上下の建物外壁面を、同一平面に仕上げることが容易となる。
【００２０】
図４は、図１の構成において、前記下側金物３の絞り部３ｂを、その下端開口と上端開口とが同心位置に並ぶ形状として柱・柱接合金物１Ｂとした例を示す。その他の構成は図１の例と同様である。この構成の柱・柱接合金物１Ｂは、図５に示す建物の内部位置での異径鋼管柱の接合に使用する。
【００２１】
図６は、この発明の他の実施形態に係る異径鋼管柱の柱・柱接合金物を示す。この柱・柱接合金物２１は、鋳鋼製または鍛造品からなる板状の中間金物２３と、この中間金物２３に上端を溶接した鋼管製で角筒状の下側金物２４と、前記中間金物２３に下端を溶接した鋼管製で角筒状の上側金物２２とからなる。前記中間金物２３は上側金物２２および下側金物２４の周壁よりも十分厚い肉厚であって、下側金物２４の上端に丁度重なる寸法に形成されている。中間金物２３は、上下面に方形環状の嵌合用突壁２３ａ，２３ｂを有し、上面の嵌合用突壁２３ａは下面の嵌合用突壁２３ｂよりも小径としてある。中間金物２３の上面には、嵌合用突壁２３ａよりも若干小径の円形開口２５が形成してある。その円形開口２５の周面は外側に向けて上昇傾斜するテーパ面としてある。また、中間金物２３の上面の前記嵌合用突壁２３ａより外側部分には外側に向け下降傾斜する開先用テーパ面２３ｃが形成され、中間金物２３の下面の前記嵌合用突壁２３ｂより外側部分には外側に向け上昇傾斜する開先用テーパ面２３ｄが形成されている。
下側金物２４は、上端が前記中間金物２３の下面の嵌合用突壁２３ｂに嵌合して、この中間金物２３に突き合わせ溶接される。この溶接には、下側金物２４の上端と中間金物２３の前記開先用テーパ面２３ｄとで構成される凹部が開先として利用される。この下側金物２４の周壁の四面には、それぞれ複数のボルト挿通孔２７が形成されている。
上側金物２２は、前記中間金物２３の上面の嵌合用突壁２３ａに嵌合して、この中間金物２３に突き合わせ溶接される。この溶接には、上側金物２２の下端と中間金物２３の前記開先用テーパ面２３ｃとで構成される凹部が開先として利用される。この上側金物２２の周壁の四面にも、それぞれ複数のボルト挿通孔２６が形成されている。
前記下側金物２４および上側金物２２は、互いに一つの角部の位置が一致する配置とされる。
この柱・柱接合金物２１は、図５に示す建物の外周において、その角部に位置する異径鋼管柱の接合に使用される。これにより、建物の外壁面を同一平面に仕上げることが容易となる。
【００２２】
この柱・柱接合金物２１の場合、鋳鋼製の中間金物２３の上下に鋼管製の上側金物２２および下側金物２４を溶接して構成されるため、鋳造品の形状が図１の場合に比べてさらに簡単になると共に、高価な鋳鋼の使用量もより少なくなり、鋳造がより簡単で材料コストが一層安くなる。
【００２３】
図７は、前記柱・柱接合金物２１を用いた柱・柱接合構造を示す。この柱・柱接合構造は、前記柱・柱接合金物２１の下側金物２４と同径の角形の下側鋼管柱８と、前記柱・柱接合金物２１の上側金物２２と同径の角形の上側鋼管柱７とを、前記柱・柱接合金物２１を介してボルト接合したものである。下側鋼管柱８の上端および上側鋼管柱７の下端の各四面に、複数のボルト挿通孔（図示せず）をそれぞれ形成しておくことは、図２の場合と同様である。
前記柱・柱接合金物２１の上側金物２２と上側鋼管柱７の下端、および柱・柱接合金物２１の下側金物２４と下側鋼管柱８の上端とは、それぞれ添え板２９，３０を介してボルト接合される。これにより上下鋼管柱７，８が継がれ、異径鋼管柱１４Ａとされる。
上側鋼管柱７の下端の各表面から柱・柱接合金物２１の上側金物２２の各表面に跨がって配置される４枚の上側添え板２９には、上側鋼管柱７のボルト挿通孔に整合する複数のボルト挿通孔（図示せず）と、柱・柱接合金物２１の上側金物２２のボルト挿通孔２６に整合する複数のボルト挿通孔（図示せず）とが形成されている。
また、前記柱・柱接合金物２１の下側金物２４の各表面から下側鋼管柱８の上端の各表面に跨がって配置される４枚の下側添え板３０には、下側金物２４のボルト挿通孔２７に整合する複数のボルト挿通孔（図示せず）と、下側鋼管柱８の上端のボルト挿通孔に整合する複数のボルト挿通孔（図示せず）とが形成されている。
【００２４】
下側鋼管柱８の上端と柱・柱接合金物２１の下側金物２４とを先にボルト接合する場合には、作業者が柱・柱接合金物２１の中間金物２３の円形開口２５から下側金物２４内に手を差し込んで、下側金物２４のボルト挿通孔２７から下側添え板３０のボルト挿通孔にわたって、さらに下側鋼管柱８のボルト挿通孔から下側添え板３０のボルト挿通孔にわたって、それぞれトルシア型の高力ボルト１１を挿通させ、この高力ボルト１１により下側添え板３０を柱・柱接合金物２１の下側金物２４に締め付け固定すると共に、下側添え板３０を下側鋼管柱８の上端に締め付け固定する。これにより、下側鋼管柱８の上端と、柱・柱接合金物２１の下側金物２４とのボルト接合が行われる。
【００２５】
上側鋼管柱７の下端と柱・柱接合金物２１の上側金物２２とのボルト接合は、上側添え板２９のボルト挿通孔から上側鋼管柱７の対応するボルト挿通孔にわたってワンサイドボルト１３を貫通させ、上側添え板２９を上側鋼管柱７の下端に締め付け固定すると共に、上側添え板２９のボルト挿通孔から柱・柱接合金物２１の上側金物２１の対応するボルト挿通孔にわたってワンサイドボルト１３を貫通させ、上側添え板２９を柱・柱接合金物２１の上側金物２２に締め付け固定することにより行われる。
【００２６】
上側鋼管柱６の下端と、柱・柱接合金物２１の上側金物２２とのボルト接合を先に行う場合には、そのボルト接合にトルシア型の高力ボルト１１を使用し、その作業において上側金物２２内に手を差し込むのに中間金物２３の円形開口２５を利用する。下側鋼管柱８の上端と、柱・柱接合金物２１の下側金物２４とのボルト接合にはワンサイドボルト１３を使用する。また、上側鋼管柱６の下端と上側金物２２のボルト接合、および下側鋼管柱８の上端と下側金物２４のボルト接合を、共にワンサイドボルト１３で行ってもよい。また、添え板２９，３０は、それぞれ片面だけに使用する場合に限らず、表裏両面に設けて２面剪断の摩擦ボルト接合としても良い。柱・柱接合金物２１の配置高さを、前記上下の鋼管柱７，８の継がれた異径鋼管柱１４Ａに接合される梁１５の位置から外した位置とすることは、図２の柱・柱接合構造の場合と同様である。
【００２７】
この柱・柱接合構造の場合も、現場では溶接作業が要らず、ボルト接合作業だけで異径鋼管柱１４Ａを接合でき、溶接作業は前記柱・柱接合金物２１の製作時に工場で行うので、品質管理も容易になる。
【００２８】
図８は、図６の構成において、前記下側金物２４および上側金物２２を、互いに一つの辺の位置が一致するように配置して柱・柱接合金物２１Ａとした例を示す。その他の構成は図６の例と同様である。この構成の柱・柱接合金物２１Ａは、図５に示す建物外周の中間位置での異径鋼管柱の接合に使用する。これにより建物の外壁面を同一平面に仕上げることが容易となる。
【００２９】
図９は、図６の構成において、前記下側金物２４と上側金物２２とが同心位置に並ぶように配置して柱・柱接合金物２１Ｂとした例を示す。その他の構成は図６の例と同様である。この構成の柱・柱接合金物２１Ｂは、図５に示す建物の内部位置での異径鋼管柱の接合に使用する。
【００３０】
【発明の効果】
この発明の異径鋼管柱の柱・柱接合金物によれば、上下鋼管柱をボルト接合できて、現場溶接が不要であり、管径の異なる上下鋼管柱の接合を、簡単な作業で信頼性高く行える。しかも、鋳鋼製の金物に鋼管製の金物を組み合わせたものであるため、管径の絞り部を堅固なものとでき、また鋳鋼の使用量を少なくして安価な鋼管を使用でき、安価に製造できる。
また、この発明の異径鋼管柱の柱・柱接合構造は、管径を絞る位置を梁の接合位置から外すため、梁の端部に管径の絞りに対応した加工を行うことが不要で、加工量が少なくて済む。また、上記の柱・柱接合金物を用いるため、このような梁位置を外した上下柱の接合が簡単に行える。
【図面の簡単な説明】
【図１】（Ａ）はこの発明の一実施形態に係る異径鋼管柱の柱・柱接合金物の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図２】同柱・柱接合金物を用いた柱・柱接合金物の正面図である。
【図３】（Ａ）は前記実施形態に係る柱・柱接合金物の他の例の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図４】（Ａ）は前記実施形態に係る柱・柱接合金物のさらに他の例の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図５】前記柱・柱接合金物の各例を使い分けた建物の鉄骨架構の部分平面図である。
【図６】（Ａ）はこの発明の他の実施形態に係る異径鋼管柱の柱・柱接合金物の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図７】同柱・柱接合金物を用いた柱・柱接合金物の正面図である。
【図８】（Ａ）は前記実施形態に係る柱・柱接合金物の他の例の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図９】（Ａ）は前記実施形態に係るさらに他の例の平面図、（Ｂ）は同柱・柱接合金物の縦断面図である。
【図１０】従来例の正面図である。
【符号の説明】
１，１Ａ，１Ｂ…柱・柱接合金物、２…上側金物、３…下側金物、３ａ…直管部、３ｂ…絞り部、３ｃ…嵌合用突壁、３ｄ…補強フランジ、５，６…ボルト挿通孔、７…上側鋼管柱、８…下側鋼管柱、９，１０…添え板、１１…高力ボルト、１３…ワンサイドボルト、１４，１４Ａ…異径鋼管柱、１５…梁、２１，２１Ａ，２１Ｂ…柱・柱接合金物、２２…上側金物、２３…中間金物、２３ａ，２３ｂ…嵌合用突壁、２４…下側金物、２５…円形開口、２６，２７…ボルト挿通孔、２９，３０…添え板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a column / column joining hardware used to join upper and lower steel pipe columns having different pipe diameters, and a column / column joining structure of different diameter steel pipe columns using the joining hardware.
[0002]
[Prior art]
Conventionally, when joining upper and lower steel pipe columns having different pipe diameters, the columns are generally squeezed at the junction between the columns and beams as shown in FIG. That is, the tapered tube 103 is welded between the upper and lower steel pipe columns 101 and 102 via the diaphragms 104 and 105, and the upper and lower flanges 106 a and 106 b of the beam 106 are welded to the diaphragms 104 and 105. The beam 106 has an end cut obliquely along the side surface of the tapered tube 103, and has a dimension that allows the top ends of the upper and lower flanges 106a and 106b to abut against the end surfaces of the upper and lower diaphragms 104 and 105 having different sizes. Processing.
[0003]
[Problems to be solved by the invention]
Thus, conventionally, since the tapered tube 103 is welded between the upper and lower steel pipe columns 101 and 102 via the diaphragms 104 and 105, the amount of processing of the tapered tube 103 and the diaphragms 104 and 105 is increased. However, processing is not easy and the cost is high. In addition, since the columns and column joints are currently welded on site using jigs, quality control is not easy. Furthermore, since the column is squeezed at the column / beam joint, it is necessary to process the end of the beam 106 so as to match the shape of the column, which also complicates the processing and increases the cost. There was a problem. In addition, since the joint between the pillar and the beam is a place where a large force is applied in a complicated manner, it is necessary to maintain the quality of welding at a high quality, which also makes quality control difficult.
[0004]
The present invention solves such problems, and can easily connect upper and lower steel pipe columns with different pipe diameters with a simple structure and easy quality control. The purpose is to provide a structure.
[0005]
[Means for Solving the Problems]
The column / column joint hardware of the different diameter steel pipe column according to the present invention has a throttle part where the pipe diameter gradually narrows to the upper end side above the straight pipe part, and has a fitting projection wall around the upper surface of the throttle part. A lower metal fitting made of cast steel, and an upper metal fitting made of steel pipe whose lower end is fitted to the outer periphery of the fitting protruding wall of the lower metal fitting and welded to the lower metal fitting by butt welding or the like. Bolt insertion holes are provided in the peripheral walls of the lower hardware and the upper hardware.
According to this column / column joining hardware, upper and lower steel pipe columns having different pipe diameters can be bolted together with the accessory plate or the like. For this reason, on-site welding is unnecessary and highly reliable joining can be performed. The lower and upper metal parts of the column / column joint hardware are joined by welding, but since they can be welded at the factory, it is easy to manage the welding quality. In addition, since this column / column joint hardware is a combination of a steel pipe and a cast product, the shape of the cast product is relatively simple and can be cast easily, and the amount of expensive cast steel used is small. These can be manufactured at low cost.
[0006]
In the column / column joint hardware, the lower metal hardware and the upper metal hardware may have a rectangular tube shape, and the narrowed portion may be narrowed so that one corner at the upper end coincides with a corner of the straight pipe portion. . In this configuration, it is easy to finish the outer wall of the building on the same plane regardless of the difference in the diameter of the upper and lower columns, using it for joining square steel pipe columns of different diameters at the corners of the outer periphery of the building. Become.
Further, the lower metal piece and the upper metal piece may be formed in a rectangular tube shape, and the throttle part may be narrowed so that one side of the upper end coincides with one side of the cross section of the straight pipe part. In the case of this configuration, it is easy to finish the outer wall surface of the building on the same plane regardless of the difference in the upper and lower column diameters, by using the steel pipe columns with different diameters at the intermediate position on the outer periphery of the building.
Moreover, you may provide the reinforcement flange which protrudes to an inner periphery at the upper end of the said lower side metal fitting. By providing the reinforcing flange in this manner, the strength of the changed portion of the column diameter where stress concentration is likely to occur is increased, and a solid steel pipe column having a different diameter can be finished. Further, unlike the case where the upper end of the lower metal piece has a closed cross section, an opening formed on the inner periphery of the reinforcing flange can be used as a work opening when the bolt is joined.
[0007]
The column / column joint structure of the different diameter steel pipe column according to the present invention is a column / column joint structure using the column / column joint hardware, the lower steel pipe column having the same diameter as the lower hardware, and the upper hardware Between the upper steel pipe column and the same diameter steel pipe column, the lower metal fitting and the lower steel pipe column are bolted together with an attachment plate, and the upper metal fitting and the upper steel pipe column are connected to each other. The bolts are joined together with the accessory plate, and the arrangement height of the column / column joint hardware is removed from the position of the beam to be joined to the different diameter steel pipe column connected to the upper and lower steel pipe columns.
According to this configuration, the position where the diameter of the column is reduced by the column / column joint hardware is removed from the position where the beam is joined, so there is no need to machine the shape of the beam end to match the shape of the column and the amount of machining is small. That's it. Further, the use of the column / column joint hardware having the above-described structure eliminates the need for on-site welding and can provide a highly reliable column / column joint structure.
[0008]
The column / column joint hardware of different diameter steel pipe columns according to claim 6 of the present invention has an annular fitting projection wall on the upper and lower surfaces, and the fitting projection wall on the upper surface has a smaller diameter than the fitting projection wall on the lower surface. An intermediate hardware made of cast steel, a lower metal fitting made of a steel pipe whose upper end is fitted to the fitting protrusion wall on the lower surface of the intermediate hardware and welded to the intermediate hardware, and a lower end for fitting the upper surface of the intermediate hardware It consists of an upper metal fitting made of steel pipe that is fitted to the projecting wall and welded to the intermediate metal fitting. Bolt insertion holes are provided in the peripheral walls of the lower hardware and the upper hardware.
With this structure, the upper and lower steel pipe columns having different pipe diameters can be bolted together with the attachment plate, etc., so that on-site welding is not required and highly reliable joining can be performed. In addition, since this column / column joint hardware is provided with upper and lower metal fittings made of steel pipe on the upper and lower sides of the intermediate steel made of cast steel, and only the portion where the pipe diameter changes is made of cast steel, many inexpensive steel pipes are used. In addition, the amount of cast steel used can be reduced and the material cost can be further reduced.
[0009]
In the column / column joint hardware, the intermediate metal hardware may have an opening having a slightly smaller diameter on the upper surface than the fitting projection wall. In the case of this configuration, since the bolt can be joined by inserting a hand from the opening of the intermediate hardware at the time of bolt joining, the joining operation can be easily performed.
Further, the lower metal piece and the upper metal piece may be formed in a rectangular tube shape, and the positions of one corner may coincide with each other. In the case of this configuration, it is easy to finish the outer wall surface of the building on the same plane by using it for joining the square steel pipe columns having different diameters at the corners on the outer periphery of the building.
Further, the lower metal piece and the upper metal piece may have a rectangular tube shape, and the positions of one side may coincide with each other. In the case of this configuration, it is easy to finish the outer wall surface of the building on the same plane by using it for joining of square steel pipe columns having different diameters at the intermediate position on the outer periphery of the building.
[0010]
A column / column joint structure of different diameter steel pipe columns according to claim 10 of the present invention is a column / column joint structure using the column / column joint hardware composed of an intermediate hardware, an upper hardware and a lower hardware, Between the lower steel pipe column having the same diameter as the lower hardware and the upper steel pipe column having the same diameter as the upper hardware, the column / column joining hardware is interposed, and the lower hardware and the lower steel pipe column are attached. The upper metal fitting and the upper steel pipe column are bolted together with other accessory plates, and the arrangement height of the column / column bonding hardware is joined to the different diameter steel pipe column connected to the upper and lower steel pipe columns. Is removed from the beam position.
Also in this configuration, the column diameter is reduced from the position where the column diameter is reduced by the column / column joint hardware, so there is no need to machine the beam end to match the shape of the column and the amount of machining is small. That's it. Further, the use of the column / column joint hardware having the above-described structure eliminates the need for on-site welding and can provide a highly reliable column / column joint structure.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a column / column joint hardware 1 of a different diameter steel pipe column according to this embodiment is made of cast steel and is made of a steel pipe having a rectangular tube-shaped lower metal fitting 3 and a lower end butt welded to the lower metal fitting 3. It consists of a square tube-shaped upper metal piece 2.
The lower metal part 3 has a throttle part 3b whose pipe diameter gradually narrows to the upper end side above the straight pipe part 3a, and a fitting protruding wall 3c is formed around the upper surface of the throttle part 3b. As shown in FIG. 1A, the throttle portion 3b has a shape of a two-way throttle that is narrowed so that one corner portion at the upper end coincides with the corner portion of the straight pipe portion 3a, and its peripheral wall is a straight pipe portion. It is slightly thicker than the peripheral wall of 3a. Further, the inner surface of the peripheral wall of the narrowed portion 3b is a tapered surface, and the portion of the outer surface that is displaced from the upper metal fitting 2 is also a tapered surface that is substantially parallel to the inner surface. At the upper end of the lower metal piece 3, a reinforcing flange 3d that protrudes inward leaving a central circular opening 4 is provided. Thereby, the intensity | strength of the pillar-column joining metal fitting 1 improves further. The shape of the opening 4 is not limited to a circle, and may be various shapes, such as a quadrangle. Moreover, the larger the opening 4 is, the better the strength can be secured. That is, the reinforcing flange 3d may be a minimum. Thereby, cost reduction can be achieved. Further, the outer portion of the fitting protruding wall 3c on the upper surface of the throttle portion 3b is a groove taper surface 3b _{1 that} is inclined downward toward the outside. A plurality of bolt insertion holes 6 are formed in two rows in the vertical direction on the four surfaces of the peripheral wall of the straight pipe portion 3a of the lower hardware 3.
The lower end of the upper metal fitting 2 is fitted into the fitting protruding wall 3c of the lower metal fitting 3, and the butt welding is performed. The welding is performed by using a recess surrounded by the lower end of the upper metal piece ₂ and the taper surface 3b1 for the groove of the throttle part 3b in the lower metal piece 3 as a groove. A plurality of bolt insertion holes 5 are also formed on the four surfaces of the peripheral wall of the upper metal piece 2.
The column / column joint hardware 1 is used for joining different-diameter steel pipe columns located at corners of the outer periphery of the building shown in FIG. Thereby, it becomes easy to finish the outer wall surface of a building on the same plane irrespective of a change in the pipe diameter of a different diameter steel pipe column.
[0012]
Since this column / column joint hardware 1 has a structure in which a steel pipe and a cast steel product are combined and welded, the structure of the cast part is simple and the amount of expensive cast steel used can be reduced. For this reason, it can manufacture at low cost. Concrete may be filled in the pillar / column joint hardware 1, and in this case, the reinforcing flange 3d is preferably small in terms of cost and structure.
[0013]
FIG. 2 shows a column / column junction structure using the column / column junction hardware 1 of FIG. This column / column connection structure includes a rectangular lower steel pipe column 8 having the same diameter as that of the lower metal fitting 3, and a square upper steel pipe column 7 having the same diameter as that of the upper metal fitting 2 of the column / column bonding hardware 1. It is bolted via a column / column junction hardware 1. A plurality of bolt insertion holes are formed in advance on each of the four surfaces of the upper end of the lower steel pipe column 8 and the lower end of the upper steel pipe column 7.
The lower metal fitting 2 and the lower end of the upper steel pipe column 7 and the lower metal fitting 3 and the upper end of the lower steel pipe column 8 of the column / column bonding hardware 1 are respectively attached via plates 9 and 10. And bolted. As a result, the upper and lower steel pipe columns 7 and 8 are joined to form a different diameter steel pipe column 14.
Bolt insertion holes of the upper steel pipe column 7 are provided in the four upper side plates 9 arranged across the respective surfaces of the lower end of the upper steel pipe column 7 and the respective surfaces of the upper metal piece 2 of the column / column joining hardware 1 ( A plurality of bolt insertion holes (not shown) that match the bolt insertion holes 5 (not shown) that match the bolt insertion holes 5 of the upper metal piece 2 of the column / column joint hardware 1 are formed. Has been.
Further, the lower metal fittings 10 are also provided on the four lower attachment plates 10 arranged across the respective surfaces of the lower metal fitting 3 of the column / column bonding hardware 1 and the upper surfaces of the lower steel pipe columns 8. A plurality of bolt insertion holes (not shown) aligned with the three bolt insertion holes 6 and a plurality of bolt insertion holes (not shown) aligned with the bolt insertion holes (not shown) at the upper end of the lower steel pipe column 8. And are formed.
In this example, the attachment plates 9 and 10 have been described with respect to the case of the one-surface shearing friction bolt joint disposed only on the outer surface of the steel pipe columns 8 and 9, but the two-surface shearing in which the attachment plates are disposed on both the inner and outer surfaces. Friction bolt joining may be used. As a result, the number of bolts can be reduced and the height of the parts can be reduced, thereby reducing the part cost.
[0014]
When bolting the upper end of the lower steel pipe column 8 and the lower metal fitting 3 of the column / column joint hardware 1 first, the operator lowers from the circular opening 4 of the lower metal hardware 3 of the column / column joint hardware 1. A hand is inserted into the side metal fitting 3 so as to extend from the bolt insertion hole 6 of the lower metal piece 3 to the bolt insertion hole of the lower side attachment plate 10 and further from the bolt insertion hole of the lower steel pipe column 8 to the bolt insertion of the lower side attachment plate 10. Each of the torcia type high strength bolts 11 is inserted through the holes, and the lower side plate 10 is fastened and fixed to the lower side hardware 3 of the column / column joint hardware 1 by the high strength bolts 11. It is fastened and fixed to the upper end of the lower steel pipe column 8. Thereby, the upper end of the lower steel pipe column 8 and the lower metal fitting 3 of the column / column bonding hardware 1 are joined.
[0015]
In the bolt joint between the lower end of the upper steel pipe column 7 and the upper metal part 2 of the column / column joint hardware 1, the one side bolt 12 is passed through from the bolt insertion hole of the upper side plate 9 to the corresponding bolt insertion hole of the upper steel pipe pillar 7. The upper side plate 9 is fastened and fixed to the lower end of the upper steel pipe column 7, and the one side bolt 12 is extended from the bolt insertion hole of the upper side plate 9 to the corresponding bolt insertion hole 5 of the upper side hardware 2 of the column / column joint hardware 1. This is performed by penetrating and fixing the upper attachment plate 9 to the upper metal fitting 2 of the column / column bonding hardware 1. The one-side bolt 12 is a shaft-like tightening tool that can be tightened by an operation on one end side and the other end of the head being plastically deformed in an expanded diameter state, and is also called a blind bolt.
[0016]
When the lower end of the upper steel pipe column 7 and the upper metal fitting 2 of the column / column connecting hardware 1 are to be joined first, the torcia type high strength bolt 11 is used for the bolt joining, and the upper metal fitting is used in the work. The circular opening 4 of the lower metal piece 3 is used to insert a hand into 2. One-side bolts 13 are used for bolt joining between the upper end of the lower steel pipe column 8 and the lower metal fitting 3 of the column / column joining hardware 1. Also, the bolt joint between the lower end of the upper steel pipe column 7 and the upper metal part 2 of the column / column joint hardware 1, and the bolt joint between the upper end of the lower steel pipe pillar 8 and the lower metal part 3 of the column / column joint hardware 1, Both may be performed with the one-side bolt 13. Further, by using a welding nut or the like on the inner surface of the steel pipe column or the like, all can be joined using a normal high-strength bolt.
[0017]
The arrangement height of the column / column joining hardware 1 is a position removed from the position of the beam 15 joined to the different diameter steel pipe column 14 connected to the upper and lower steel pipe columns 7 and 8. Thereby, it is possible to easily join, for example, the lower steel pipe column 8 having a uniform diameter without processing the end portion of the beam 15 into a special shape. Here, the upper and lower flanges 15 a and 15 b of the bracket constituting the end of the beam 15 are butt-welded to the upper and lower diaphragms 16 a and 16 b provided in the middle of the lower steel pipe column 8. The beam 15 may be bolted by providing an end plate, or may be bolted using a fitting such as a split tee.
[0018]
According to this column / column joining structure, welding work is not required on site, and the different diameter steel pipe column 14 can be joined only by the bolt joining operation. Welding is necessary when the column / column joint 1 is manufactured, but since it is performed at the factory, it is easy to manage the welding work and the welding quality. These make it possible to perform highly reliable column / column connection. Note that concrete may be filled in the whole of the different-diameter steel pipe column 14 or the column / column joint hardware 1.
[0019]
FIG. 3 is a column / column joint in which the narrowed portion 3b of the lower metal piece 3 has a three-way narrowed shape in which the upper side of the narrowed portion 3b is narrowed so as to coincide with one side of the cross section of the straight pipe portion 3a. An example of the hardware 1A is shown. Other configurations are the same as those in the example of FIG. The column / column joint hardware 1A having this configuration is used for joining different diameter steel pipe columns at an intermediate position on the outer periphery of the building shown in FIG. Thereby, it becomes easy to finish the upper and lower building outer wall surfaces of the deformed portion of the column diameter to the same plane.
[0020]
FIG. 4 shows an example in which, in the configuration of FIG. 1, the throttle portion 3b of the lower metal piece 3 is a column / column joint metal 1B having a shape in which the lower end opening and the upper end opening are arranged concentrically. Other configurations are the same as those in the example of FIG. The column / column joining hardware 1B having this configuration is used for joining different diameter steel pipe columns at the internal position of the building shown in FIG.
[0021]
FIG. 6 shows a column / column joint hardware of different diameter steel pipe columns according to another embodiment of the present invention. The column / column joining hardware 21 includes a plate-like intermediate metal 23 made of cast steel or a forged product, a steel tube made of a steel pipe welded at the upper end to the intermediate metal 23, and a rectangular steel lower metal 24, and the intermediate metal 23 It is made of a steel pipe made of a steel pipe welded at its lower end to a rectangular tube-shaped upper metal piece 22. The intermediate hardware 23 has a thickness that is sufficiently thicker than the peripheral walls of the upper hardware 22 and the lower hardware 24, and has a dimension that overlaps the upper end of the lower hardware 24. The intermediate metal piece 23 has square annular fitting protrusion walls 23a and 23b on the upper and lower surfaces, and the upper fitting protrusion wall 23a has a smaller diameter than the lower fitting protrusion wall 23b. On the upper surface of the intermediate hardware 23, a circular opening 25 having a slightly smaller diameter than the fitting protruding wall 23a is formed. The peripheral surface of the circular opening 25 is a tapered surface that rises and inclines toward the outside. Further, a groove taper surface 23c that is inclined downward is formed on the outer surface of the upper surface of the intermediate metal piece 23 from the fitting protruding wall 23a. Is formed with a taper surface 23d for a groove which is inclined upward toward the outside.
The lower metal piece 24 is fitted to a fitting projection wall 23 b on the lower surface of the intermediate metal piece 23 and is butt welded to the intermediate metal piece 23. In this welding, a recess formed by the upper end of the lower metal piece 24 and the groove tapered surface 23d of the intermediate metal piece 23 is used as a groove. A plurality of bolt insertion holes 27 are respectively formed on the four surfaces of the peripheral wall of the lower hardware 24.
The upper metal piece 22 is fitted into the fitting protrusion wall 23 a on the upper surface of the intermediate metal piece 23 and is butt welded to the intermediate metal piece 23. In this welding, a recess formed by the lower end of the upper metal piece 22 and the groove taper surface 23c of the intermediate metal piece 23 is used as a groove. A plurality of bolt insertion holes 26 are also formed on each of the four surfaces of the peripheral wall of the upper metal piece 22.
The lower hardware 24 and the upper hardware 22 are arranged so that the positions of one corner coincide with each other.
The column / column joint hardware 21 is used for joining different diameter steel pipe columns located at corners of the outer periphery of the building shown in FIG. Thereby, it becomes easy to finish the outer wall surface of a building on the same plane.
[0022]
In the case of this column / column joint hardware 21, the upper and lower steel hardwares 22 and 24 made of steel pipe are welded to the upper and lower sides of the intermediate steel 23 made of cast steel. In addition, the amount of expensive cast steel used is smaller, casting is easier and material costs are even lower.
[0023]
FIG. 7 shows a column / column junction structure using the column / column junction hardware 21. This column / column joint structure is a square lower steel pipe column 8 having the same diameter as the lower metal 24 of the column / column bonded hardware 21 and a square having the same diameter as the upper metal 22 of the column / column bonded hardware 21. The upper steel pipe column 7 is bolted via the column / column bonding hardware 21. The formation of a plurality of bolt insertion holes (not shown) on the four surfaces of the upper end of the lower steel pipe column 8 and the lower end of the upper steel pipe column 7 is the same as in the case of FIG.
The upper metal part 22 and the lower end of the upper steel pipe column 7 of the column / column joint hardware 21 and the lower metal part 24 and the upper end of the lower steel pipe column 8 of the column / column joint metal part 21 are respectively attached via attachment plates 29 and 30. And bolted. As a result, the upper and lower steel pipe columns 7 and 8 are joined to form a different diameter steel pipe column 14A.
The four upper attachment plates 29 arranged across the respective surfaces of the lower end of the upper steel pipe column 7 from the respective surfaces of the upper metal piece 22 of the column / column joint hardware 21 are provided with bolt insertion holes of the upper steel pipe column 7. A plurality of bolt insertion holes (not shown) to be matched and a plurality of bolt insertion holes (not shown) to be matched with the bolt insertion holes 26 of the upper metal piece 22 of the column / column joint hardware 21 are formed.
Further, the four lower attachment plates 30 arranged across the respective surfaces of the lower hardware 24 of the column / column joining hardware 21 and the upper surfaces of the lower steel pipe columns 8 are provided with the lower hardware. A plurality of bolt insertion holes (not shown) that match the 24 bolt insertion holes 27 and a plurality of bolt insertion holes (not shown) that match the bolt insertion holes at the upper end of the lower steel pipe column 8 are formed. Yes.
[0024]
When the upper end of the lower steel pipe column 8 and the lower hardware 24 of the column / column joint hardware 21 are first bolted together, the operator lowers from the circular opening 25 of the intermediate hardware 23 of the column / column joint hardware 21. A hand is inserted into the hardware 24, from the bolt insertion hole 27 of the lower hardware 24 to the bolt insertion hole of the lower accessory plate 30, and further from the bolt insertion hole of the lower steel pipe column 8 to the bolt insertion hole of the lower accessory plate 30. The torcia-type high-strength bolts 11 are inserted, and the lower attachment plate 30 is fastened and fixed to the lower attachment 24 of the column / column joining hardware 21 by the high-strength bolts 11 and the lower attachment plate 30 is It is fastened and fixed to the upper end of the side steel pipe column 8. As a result, the upper end of the lower steel pipe column 8 and the lower metal fitting 24 of the column / column bonding hardware 21 are joined by bolts.
[0025]
In the bolt joint between the lower end of the upper steel pipe column 7 and the upper metal part 22 of the column / column joint hardware 21, the one-side bolt 13 is passed through from the bolt insertion hole of the upper attachment plate 29 to the corresponding bolt insertion hole of the upper steel pipe pillar 7. The upper side plate 29 is clamped and fixed to the lower end of the upper steel pipe column 7, and the one side bolt 13 is penetrated from the bolt insertion hole of the upper side plate 29 to the corresponding bolt insertion hole of the upper side metal fixture 21 of the column / column joint hardware 21. The upper attachment plate 29 is clamped and fixed to the upper hardware 22 of the column / column joining hardware 21.
[0026]
When the lower end of the upper steel pipe column 6 and the upper metal fitting 22 of the column / column bonding hardware 21 are first bolted, the Torcia-type high-strength bolt 11 is used for the bolt bonding, and the upper metal fitting is used in the work. The circular opening 25 of the intermediate hardware 23 is used to insert a hand into the 22. The one-side bolt 13 is used for the bolt connection between the upper end of the lower steel pipe column 8 and the lower metal fitting 24 of the column / column bonding hardware 21. Further, the one-side bolt 13 may be used for both the lower end of the upper steel pipe column 6 and the upper metal member 22 and the upper end of the lower steel tube column 8 and the lower metal member 24. In addition, the attachment plates 29 and 30 are not limited to being used only on one side, but may be provided on both the front and back surfaces for two-surface shear friction bolt joining. The column / column joint hardware 21 is arranged at a position removed from the position of the beam 15 joined to the different diameter steel tube column 14A connected to the upper and lower steel tube columns 7 and 8 as shown in FIG. -It is the same as the case of the column junction structure.
[0027]
Even in the case of this column / column connection structure, welding work is not required at the site, and the different diameter steel pipe column 14A can be bonded only by the bolt bonding operation, and the welding operation is performed at the factory when the column / column joint hardware 21 is manufactured. Quality control becomes easy.
[0028]
FIG. 8 shows an example in which the lower metal piece 24 and the upper metal piece 22 are arranged so that the positions of one side coincide with each other in the configuration of FIG. Other configurations are the same as the example of FIG. The column / column joint hardware 21A having this configuration is used for joining different-diameter steel pipe columns at an intermediate position on the outer periphery of the building shown in FIG. Thereby, it becomes easy to finish the outer wall surface of a building on the same plane.
[0029]
FIG. 9 shows an example in which the lower metal piece 24 and the upper metal piece 22 are arranged so as to be arranged in a concentric position in the configuration of FIG. Other configurations are the same as the example of FIG. The column / column joining hardware 21B having this configuration is used for joining different diameter steel pipe columns at the internal position of the building shown in FIG.
[0030]
【The invention's effect】
According to the column / column joint hardware of the different diameter steel pipe columns of this invention, the upper and lower steel pipe columns can be bolted together, no on-site welding is required, and the joining of the upper and lower steel pipe columns with different pipe diameters is easy and reliable. Can be expensive. Moreover, because it is a combination of cast steel hardware and steel pipe hardware, the diameter of the pipe diameter can be made solid, and less expensive steel pipe can be used by reducing the amount of cast steel used. it can.
In addition, the column / column connection structure of steel pipe columns with different diameters according to the present invention removes the position of the pipe diameter from the joint position of the beam, so that it is not necessary to perform processing corresponding to the pipe diameter reduction at the end of the beam. Less processing amount is required. Further, since the above-mentioned column / column joint hardware is used, it is possible to easily join the upper and lower columns with the beam position removed.
[Brief description of the drawings]
FIG. 1A is a plan view of a column / column joint hardware of a different diameter steel pipe column according to an embodiment of the present invention, and FIG. 1B is a longitudinal sectional view of the column / column joint hardware.
FIG. 2 is a front view of a column / column joint hardware using the same column / column joint hardware;
FIG. 3A is a plan view of another example of the column / column joint hardware according to the embodiment, and FIG. 3B is a longitudinal sectional view of the column / column joint hardware.
FIG. 4A is a plan view of still another example of the column / column joint hardware according to the embodiment, and FIG. 4B is a longitudinal sectional view of the column / column joint hardware.
FIG. 5 is a partial plan view of a steel frame of a building in which each example of the pillar / column joint hardware is properly used.
6A is a plan view of a column / column joint hardware of a different diameter steel pipe column according to another embodiment of the present invention, and FIG. 6B is a longitudinal sectional view of the column / column joint hardware.
FIG. 7 is a front view of a pillar / column joint hardware using the same pillar / column joint hardware;
FIG. 8A is a plan view of another example of the column / column joint hardware according to the embodiment, and FIG. 8B is a longitudinal sectional view of the column / column joint hardware.
FIG. 9A is a plan view of still another example according to the embodiment, and FIG. 9B is a longitudinal sectional view of the same pillar / column joint hardware.
FIG. 10 is a front view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,1A, 1B ... Column and column joint metal, 2 ... Upper metal, 3 ... Lower metal, 3a ... Straight pipe part, 3b ... Restriction part, 3c ... Projection wall for fitting, 3d ... Reinforcement flange, 5, 6 ... Bolt insertion hole, 7 ... Upper steel pipe column, 8 ... Lower steel pipe column, 9, 10 ... Saddle plate, 11 ... High strength bolt, 13 ... One side bolt, 14, 14A ... Different diameter steel pipe column, 15 ... Beam, 21 , 21A, 21B ... pillar / column joint hardware, 22 ... upper hardware, 23 ... intermediate hardware, 23a, 23b ... fitting wall, 24 ... lower hardware, 25 ... circular opening, 26, 27 ... bolt insertion hole, 29 , 30 ... Plate

Claims

A lower part made of cast steel having a constricted part whose pipe diameter gradually narrows to the upper end side above the straight pipe part, and a fitting projection wall around the upper surface of the constricted part, and the fitting of the lower part Columns of different diameter steel pipe columns having lower end fitting on the outer periphery of the joint projection wall and welded to the lower hardware and made of steel pipe and having bolt insertion holes in the peripheral walls of the lower hardware and upper hardware -Column joint hardware.

2. The different diameter steel pipe according to claim 1, wherein the lower metal piece and the upper metal piece are in a rectangular tube shape, and the throttle portion is narrowed so that one corner portion at the upper end coincides with a corner portion of the straight pipe portion. Pillar pillars and pillar joint hardware.

2. The steel pipe column according to claim 1, wherein the lower metal piece and the upper metal piece are in a rectangular tube shape, and the narrowed portion is narrowed so that one side of the upper end coincides with one side of a cross section of the straight pipe part. Pillar / pillar joint hardware.

The column / column joint hardware for different diameter steel pipe columns according to claim 1, wherein a reinforcing flange projecting toward the inner periphery is provided at an upper end of the lower metal hardware.

A column / column joint structure using the column / column joint hardware of different diameter steel pipe columns according to claim 1, claim 2, claim 3, or claim 4, wherein the lower steel tube has the same diameter as the lower hardware. The column / column joint metal fitting is interposed between a column and an upper steel pipe column having the same diameter as the upper metal fitting, and the lower metal fitting and the lower steel pipe column are bolted together with an accessory plate. A steel pipe column is bolted together with other accessory plates, and the disposition height of the column / column joint hardware is removed from the position of the beam to be joined to the different diameter steel tube column connected to the upper and lower steel pipe columns. Steel pipe column / column connection structure.

An intermediate fitting made of cast steel having an annular fitting projection wall on the upper and lower surfaces, the fitting projection wall on the upper surface being smaller in diameter than the fitting projection wall on the lower surface, and the fitting projection wall on the lower surface of the intermediate fitting A steel pipe lower metal fitting welded to the intermediate metal fitting, and a steel pipe upper metal fitting whose lower end is fitted to the fitting protrusion wall on the upper surface of the intermediate metal fitting and welded to the intermediate metal fitting. Column and column joint hardware of different diameter steel pipe columns having bolt insertion holes on the peripheral walls of the lower and upper hardware.

The said intermediate | middle metal fitting is a column / column joining metal fitting of a different diameter steel pipe column of Claim 6 which has an opening a little smaller diameter than the protrusion wall for fitting on an upper surface.

The column / column joint hardware for different diameter steel pipe columns according to claim 6 or 7, wherein the lower side hardware and the upper side metal are in the shape of a rectangular tube, and the positions of one corner coincide with each other.

8. The column / column joint hardware for different diameter steel pipe columns according to claim 6 or 7, wherein the lower side hardware and the upper side hardware are in the shape of a rectangular tube and the positions of one side coincide with each other.

A column / column joint structure using the column / column joint hardware of different diameter steel pipe columns according to claim 6, claim 7, claim 8 or claim 9, wherein the lower steel tube has the same diameter as the lower hardware. The column / column joint metal fitting is interposed between a column and an upper steel pipe column having the same diameter as the upper metal fitting, and the lower metal fitting and the lower steel pipe column are bolted together with an attachment plate, A steel pipe column is bolted together with other accessory plates, and the disposition height of the column / column joint hardware is removed from the position of the beam to be joined to the different diameter steel tube column connected to the upper and lower steel pipe columns. Steel pipe column / column connection structure.