JP3683615B2

JP3683615B2 - How to build pre-assembled column reinforcement bar

Info

Publication number: JP3683615B2
Application number: JP14939595A
Authority: JP
Inventors: 博今井
Original assignee: Tokyo Tekko Co Ltd
Current assignee: Tokyo Tekko Co Ltd
Priority date: 1995-05-24
Filing date: 1995-05-24
Publication date: 2005-08-17
Anticipated expiration: 2020-08-17
Also published as: JPH08319694A

Description

【０００１】
【産業上の利用分野】
本発明は、先組柱鉄筋篭の建て込み方法に関する。
【０００２】
【従来の技術】
この種の先組柱鉄筋篭は、図８（ａ）に示すように、長手方向（上下方向）に延びる外筋１と、その内側に配置されて外筋１の平行に延びる芯筋２と、外フープ筋３，中子筋（図示しない）等の剪断補強筋とで組み立てられている。この先組柱鉄筋篭を建て込む場合、例えば図８（ａ）に示すように、上側の柱鉄筋篭Ｂをクレーンで吊り下げて既に建て込み済の下側の柱鉄筋篭Ａの上方に配置し、その状態で上側の柱鉄筋篭Ｂを下降させ、図８（ｂ）に示すように、下側と上側の柱鉄筋篭Ａ、Ｂの外筋１同士および芯筋２同士を、それぞれ継手を用いて接続する。上記外筋１，芯筋２がねじ鉄筋の場合、継手としてカプラーナット１０およびロックナット１１が用いられる。
【０００３】
【発明が解決しようとする課題】
従来では、柱鉄筋篭Ｂの外筋１と芯筋２の下端レベルが同一高さにあるため、芯筋２を接続する際には、外筋１の隙間から作業を行うことになり、外筋１が邪魔になって作業性が悪かった。特に外筋１が多数用いられていて外筋１間の隙間が狭い場合には、芯筋２の接続のための作業性が著しく悪かった。
【０００４】
本発明は、上記事情を考慮し、芯筋の接続作業を容易に行うことができ、作業性の向上を図ることができる先組柱鉄筋篭の建て込み方法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】
請求項１の発明は、長手方向に延びる外筋と、その内側に配置されて外筋と平行に延び外筋と同一長さを有する芯筋と、剪断補強筋とで組み立てられた先組柱鉄筋篭を、建て込む際に、既に建て込み済の下側の柱鉄筋篭の上方に上側の柱鉄筋篭を吊り下げ状態で配置し、上下の柱鉄筋篭の外筋同士および芯筋同士をそれぞれ継手を介して接続する先組柱鉄筋篭の建て込み方法において、上側の柱鉄筋篭を、外筋と芯筋を上下方向相対移動可能にして組み立て、上側の柱鉄筋篭の外筋および芯筋の上端部を、プレートの挿通孔に挿通させるとともに、これら外筋および芯筋の上端部に上記プレートの上方においてストッパを設け、外筋に設けたストッパより芯筋に設けたストッパを高い位置に配置し、この状態でプレートを吊り下げ、このプレートに上記ストッパを係止させることにより、外筋の下端レベルを芯筋の下端レベルよりも上方に位置させ、この状態で上下の柱鉄筋篭の芯筋同士を接続し、その後、プレートを下降させることにより、上側の柱鉄筋篭の外筋を下降させて、上下の柱鉄筋篭の外筋同士を接続することを特徴とする。
【０００７】
請求項２の発明は、長手方向に延びる外筋と、その内側に配置されて外筋と平行に延び外筋と同一長さを有する芯筋と、剪断補強筋とで組み立てられた先組柱鉄筋篭を、建て込む際に、既に建て込み済の下側の柱鉄筋篭の上方に上側の柱鉄筋篭を吊り下げ状態で配置し、上下の柱鉄筋篭の外筋同士および芯筋同士をそれぞれ継手を介して接続する先組柱鉄筋篭の建て込み方法において、上側の柱鉄筋篭を、外筋および剪断補強筋に対して芯筋を上下方向相対移動可能にして組み立て、上側の柱鉄筋篭の最上端の剪断補強筋にプレートを乗せ、このプレートの挿通孔に上側の柱鉄筋篭の芯筋の上端部を挿通させるとともに、この芯筋にプレートより上方に所定寸法離してストッパを設け、上側の柱鉄筋篭の外筋の上端部を吊り下げることにより、芯筋のストッパをプレートに係止させ、それにより、外筋の下端レベルを芯筋の下端レベルよりも上方に位置させ、この状態で上下の柱鉄筋篭の芯筋同士を接続し、その後、上側の柱鉄筋篭を下降させて、上下の柱鉄筋篭の外筋同士を接続することを特徴とする。
【０００８】
請求項３の発明は、請求項１に記載の先組柱鉄筋篭の建て込み方法において、上下の柱鉄筋篭の外筋および芯筋をねじ鉄筋とし、上記ストッパをこれら外筋，芯筋に螺合されるナットとし、上記継手を上下の外筋または上下の芯筋の端部にわたって螺合されるカプラーナットとすることを特徴とする。
請求項４の発明は、請求項２に記載の先組柱鉄筋篭の建て込み方法において、上下の柱鉄筋篭の外筋および芯筋をねじ鉄筋とし、上記ストッパをこの芯筋に螺合されるナットとし、上記継手を上下の外筋または上下の芯筋の端部にわたって螺合されるカプラーナットとすることを特徴とする。
【０００９】
請求項５の発明は、長手方向に延びる外筋と、その内側に配置されて外筋と平行に延び外筋と同一長さを有する芯筋と、剪断補強筋とで組み立てられた先組柱鉄筋篭を、建て込む際に、既に建て込み済の下側の柱鉄筋篭の上方に上側の柱鉄筋篭を吊り下げ状態で配置し、上下の柱鉄筋篭の外筋同士および芯筋同士をそれぞれ継手を介して接続する先組柱鉄筋篭の建て込み方法において、上側の柱鉄筋篭を、外筋と芯筋を上下方向相対移動可能にして組み立て、芯筋の外周に補助フープ筋を配設して芯筋と結束し、上側柱鉄筋篭の吊り下げ前に、この上側柱鉄筋篭に補助フープ筋より所定距離下方においてストッパ棒を貫通させ、この状態で上側の柱鉄筋篭を吊り下げることにより、ストッパ棒で補助フープ筋を係止し、それにより外筋の下端レベルを芯筋の下端レベルよりも上方に位置させ、この状態で上下の柱鉄筋篭の芯筋同士を接続し、その後、ストッパ棒を抜き取るとともに上側の柱鉄筋篭を下降させ、上下の柱鉄筋篭の外筋同士を接続することを特徴とする。
【００１０】
請求項６の発明は、長手方向に延びる外筋と、その内側に配置されて外筋と平行に延びる芯筋と、剪断補強筋とで組み立てられた先組柱鉄筋篭を、建て込む際に、既に建て込み済の下側の柱鉄筋篭の上方に上側の柱鉄筋篭を吊り下げ状態で配置し、上下の柱鉄筋篭の外筋同士および芯筋同士をそれぞれ継手を介して接続する先組柱鉄筋篭の建て込み方法において、上側の柱鉄筋篭の外筋を芯筋より短くし、外筋の下端レベルを芯筋の下端レベルよりも上方に位置させるようにして、上側の柱鉄筋篭を組み立て、上側の柱鉄筋篭を吊り下げた状態で上側の柱鉄筋篭の芯筋を下側の柱鉄筋篭の芯筋に接続し、その後、外筋の下端レベルと芯筋の下端レベルの差にほぼ相当する長さの中継筋を介して、継手により上下の柱鉄筋篭の外筋同士を接続することを特徴とする。
【００１１】
【作用】
請求項１の発明では、上側と下側の柱鉄筋篭の芯筋同士を接続する段階で、上側の柱鉄筋篭の外筋の下端レベルが芯筋の下端レベルより上側にあるので、外筋に邪魔されずに芯筋同士の接続作業を行うことができる。また、芯筋接続後に、上側の柱鉄筋篭の外筋を下降させることにより、上下の柱鉄筋篭の外筋同士を接続することができる。
【００１２】
しかも請求項１の発明では、プレートを吊り上げると、ストッパがプレートに当たることで、外筋と芯筋が共に落下しないように保持される。この吊り下げ状態で、外筋と芯筋のストッパの位置の違いにより、外筋の下端レベルが芯筋の下端レベルよりも上側に位置する。したがって、芯筋同士を外筋に邪魔されずに、容易に接続することができる。芯筋同士の接続が終わったら、さらにプレートを吊り下ろす。そうすると、芯筋は固定されていて動かないが、外筋が下降する。したがって、上下の柱鉄筋篭の外筋同士を接続することができる。このように、プレートとストッパを用いて芯筋と外筋のレベル差を容易に得ることができるとともに、プレートの下降に伴って外筋の下降を行えるので、作業性が良い。
【００１３】
請求項２の発明では、上側柱鉄筋篭を吊り上げると、芯筋に設けたストッパが、プレートに当たり、芯筋が落下しないように保持される。この吊り下げ状態で、外筋の下端レベルが芯筋の下端レベルよりも上側に位置する。したがって、芯筋同士を外筋に邪魔されずに容易に接続することができる。また、芯筋同士の接続が終わったら、さらに上側柱鉄筋篭を吊り下ろす。そうすると、芯筋は動かないが、外筋が下降する。したがって、上側の外筋と下側の外筋同士を接続することができる。このように、プレートとストッパを用いて芯筋と外筋のレベル差を容易に得ることができるとともに、外筋の下降も容易に行えるので、作業性が良い。
【００１４】
請求項３，４の発明では、外筋，芯筋にねじ筋を用い、ストッパとしてこれらねじ筋に螺合されるナットを用いるので、ストッパの位置調節を容易に行うことができる。また、外筋同士，芯筋同士の接続に、これらと螺合されるカプラーナットを用いるので、接続作業も楽である。
【００１５】
請求項５の発明では、上側柱鉄筋篭を吊り上げると、芯筋に結束された補助フープ筋が、ストッパ棒に当たり、芯筋が落下しないように保持される。そして、補助フープ筋がストッパ棒に当たって止まることで、外筋の下端レベルが芯筋の下端レベルよりも上側に位置する。従って、上側鉄筋篭を吊り下げた状態で、芯筋同士を外筋に邪魔されずに、容易に接続することができる。芯筋同士の接続が終わったら、ストッパ棒を抜くとともに、さらに上側鉄筋篭を吊り下ろす。そうすると、芯筋は固定されていて動かないが、外筋が下降する。したがって、上側の外筋と下側の外筋同士を接続することができる。このように、補助フープ筋とストッパ棒を用いることにより、芯筋と外筋のレベル差を容易に得ることができるとともに、外筋の下降も容易に行えるので、作業性が良い。
【００１６】
請求項６の発明では、上側の柱鉄筋篭の組立て時に予め外筋の下端レベルと芯筋の下端レベルに差を設けておくので、上側の柱鉄筋篭を吊り下げた状態で、芯筋同士を外筋に邪魔されずに、容易に接続することができる。また、芯筋同士の接続が終わったら、中継筋を用いることで、上下の柱鉄筋篭の外筋同士を接続することができる。
【００１７】
【実施例】
以下、本発明の各実施例を図面に基づいて説明する。まず、図１および図２を用いて第１実施例を説明する。この第１実施例の方法では、図１に示すように、外筋１と芯筋２と外フープ筋３（剪断補強筋）と中子筋４（剪断補強筋）とで柱鉄筋篭Ａ，Ｂを先組みする。特に図１（ｂ）に良く示されているように、外筋１は柱鉄筋篭Ａ，Ｂの外周に配置され、その長手方向に延びる。芯筋２は外筋１の内側に配置されて外筋１と平行に延びる。外筋１と芯筋２は同一長さを有し、ねじ鉄筋からなる。外フープ筋３は、図１（ｃ）に示すようにほぼ正方形をなし、外筋１の外周に巻かれる。中子筋４は、図１（ｄ），（ｅ）に示すような細長い矩形をなしており、交差するように配置されて対をなしている。各中子筋４は、柱鉄筋篭Ａ，Ｂの辺に位置する外筋１と芯筋２の外周に巻かれる。なお、後述する他の実施例でも、この柱鉄筋篭Ａ，Ｂの基本構造は同じである。
【００１８】
上記芯筋２と中子筋４、中子筋４と外フープ筋３は細い金属線できつく結束し（本結束し）、外筋１は、外フープ筋３，中子筋４と緩く結束するか全く結束せず、外筋１を他の筋２，３，４に対して長手方向に移動自在にしておく。なお、外筋１を外フープ筋３，中子筋４に対して本結束し、芯筋２を中子筋４に対して本結束せず、芯筋２を他の筋１，３，４に対して長手方向に移動自在にしてもよい。要は、組み立て状態において、外筋１と芯筋２とが長手方向に相対移動可能であればよい。
【００１９】
本実施例では、上側の柱鉄筋篭Ｂを吊るために、挿通孔１３を有するプレート１２を用いる。図１（ａ）に示すように、柱鉄筋篭Ｂを床Ｆに立てた状態において、その外筋１および芯筋２の上端部をそれぞれプレート１２の挿通孔に挿通させる。各外筋１および芯筋２の上端部には、プレート１２よりも上方に、挿通孔１３より大きな径の落ち止め用のナット１４（ストッパ）を螺合する。そして、これら外筋１に螺合したナット１４のレベルを、芯筋２に螺合したナット１４のレベルより所定寸法以上、下側にしておく。
【００２０】
こうした状態でプレート１２をクレーンで水平な姿勢のまま吊り上げると、図２（ａ）に示すように、ナット１４がプレート１２に当たることで、外筋１と芯筋２が共に落下しないように保持される。そして、このように吊り支持された状態で、上述したナット１４の螺合位置の違いに応じて、外筋１の下端１ｂのレベルが、芯筋２の下端２ｂのレベルより上側に位置するようになる。従って、このまま吊り支持した状態で、上側の柱鉄筋篭Ｂの芯筋２と、既に建込み済みの下側の柱鉄筋篭Ａの芯筋２の位置合わせを行うことにより、図２（ｂ）に示すように、外筋１に邪魔されずに、芯筋２同士をカプラーナット１０とロックナット１１を用いて容易に接続することができる。
【００２１】
次いで、芯筋２同士の接続が終わったら、プレート１２をさらに吊り下ろす。そうすると、芯筋２は固定されていて動かないが、図２（ｃ）に示すように外筋１が下降する。従って、上側の外筋１と下側の外筋１を位置合わせして、外筋１同士を接続することができる。
【００２２】
本実施例では、プレート１２とナット１４を用い、柱鉄筋篭Ｂを吊り下げるだけで、外筋１と芯筋２のレベル差の確保と、芯筋２接続後の外筋１の下降を簡単に実現できる。
【００２３】
次に、図３および図４を用いて第２実施例を説明する。この第２実施例の方法では、図３に示すように、柱鉄筋篭Ｂを先組みする際に、外筋１と外フープ筋３、外筋１と中子筋４をそれぞれ本結束し、芯筋２と中子筋４は全く結束しないか本結束せず、芯筋２を他の筋１，３，４に対して長手方向（上下方向）に自由に動けるようにしておく。また、最上端の中子筋４には、挿通孔１７を有するプレート１６を固定しておく。なお、プレート１６は中子筋４に単に載せるだけでもよい。このプレート１６の挿通孔１７には芯筋２の上端部が挿通されている。この芯筋２の上端部には、プレート１６よりも上方にて、挿通孔１７より径の大きいナット１４（ストッパ）を螺合する。ナット１４の螺合位置は、外筋１と芯筋２の下端を一致させたときに、プレート１６より所定寸法だけ上側の位置である。
【００２４】
こうした状態で、外筋１をクランプ１９を介してクレーンで吊り上げると、図４（ａ）に示すように、芯筋１に螺合したナット１４が、プレート１６に当たり、芯筋２が落下しないように保持される。そして、このように吊り支持された状態で、ナット１４の螺合位置により、外筋１の下端１ｂのレベルが、芯筋２の下端２ｂのレベルより上側に位置するようになる。従って、このまま吊り支持した状態で、上側の柱鉄筋篭Ｂの芯筋２と下側の柱鉄筋篭Ａの芯筋２の位置合わせを行うことにより、図４（ｂ）に示すように、外筋１に邪魔されずに、簡単に芯筋２同士をカプラーナット１０とロックナット１１を用いて接続することができる。
【００２５】
次いで、芯筋２同士の接続が終わったら、上側の柱鉄筋篭Ｂをさらに吊り下ろす。そうすると、芯筋２は固定されていて動かないが、外筋１は下降する。従って、図４（ｃ）に示すように、上側の外筋１と下側の外筋１を位置合わせして、外筋１同士を接続することができる。
【００２６】
本実施例では、プレート１６とナット１４を用い、柱鉄筋篭Ｂを吊り下げるだけで、外筋１と芯筋２のレベル差を簡単に確保でき、また芯筋２接続後の外筋１の下降を簡単に実現できる。
【００２７】
次に、図５および図６を用いて第３実施例を説明する。この第３実施例の方法では、第２実施例と同様に、柱鉄筋篭Ｂを先組みする際に、芯筋２を他の筋１，３，４に対して上下方向に動けるようにしておく。そして、芯筋２の上下方向の２箇所に補助フープ筋６を結束すると共に、下側の補助フープ筋６より所定寸法下方において、ストッパ棒２０を外フープ筋３間に水平に差し込んでおく。
【００２８】
こうした状態で、外筋１をクランプ１９を介してクレーンで吊り上げると、図６（ａ）に示すように、芯筋２に結束された補助フープ筋６が、ストッパ棒２０に当たり、芯筋２が落下しないように保持される。そして、このように吊り支持されて、補助フープ筋６がストッパ棒２０に当たって止まることで、外筋１の下端１ｂのレベルが芯筋２の下端２ｂのレベルよりも上側に位置するようになる。従って、このまま吊り支持した状態で、上側の柱鉄筋篭Ｂの芯筋２と下側の柱鉄筋篭Ａの芯筋２の位置合わせを行うことにより、図６（ｂ）に示すように、外筋１に邪魔されずに、簡単に芯筋２同士をカプラーナット１０とロックナット１１を用いて接続することができる。
【００２９】
上記芯筋２同士の接続が終わったら、図６（ｃ）に示すように、外フープ筋３間に差し込んであったストッパ棒２０を引き抜いた後、さらに上側の柱鉄筋篭Ｂを吊り下ろす。そうすると、芯筋２は固定されていて動かないが、外筋１は下降する。従って、上側の外筋１と下側の外筋１を位置合わせして、外筋１同士を接続することができる。
【００３０】
この実施例でも、芯筋２に結束された補助フープ筋６とストッパ棒２０を用い、柱鉄筋篭Ｂを吊り下げるだけで、外筋１と芯筋２のレベル差を簡単に確保でき、またストッパ棒２０を抜くことにより、外筋１の下降も容易に実現できる。
【００３１】
次に、図７を用いて第４実施例を説明する。この第４実施例の方法では、柱鉄筋篭Ｂを先組みする際に、外筋１が芯筋２よりも短くなっており、結束状態で、外筋１の下端１ｂのレベルと、芯筋２の下端２ｂのレベルに差を設けておく。すべての筋１〜４は互いに本結束されている。こうすることにより、柱鉄筋篭Ｂを吊り下げた際に、図７（ａ）および（ｂ）に示すように、芯筋２同士を外筋１に邪魔されずに、容易に接続することができる。芯筋２同士の接続が終わったら、上側の柱鉄筋篭Ｂの外筋１の下端１ｂと、下側の柱鉄筋篭Ａの外筋１の上端１ａとの間に中継筋（外筋１の一部となる鉄筋）８を挿入し、図７（ｃ）に示すように、中継筋８とカプラーナット１０，ロックナット１１を介して上側と下側の外筋１同士を接続する。これにより、上下の柱鉄筋篭Ａ、Ｂを連結することができる。
【００３２】
【発明の効果】
以上説明したように、請求項１，２の発明によれば、上側の柱鉄筋篭の外筋の下端レベルが芯筋の下端レベルより上側にあるので、外筋に邪魔されずに芯筋同士の接続作業を行うことができる。また、芯筋接続後に、上側の柱鉄筋篭の外筋を下降させることにより、上下の柱鉄筋篭の外筋同士を接続することができる。しかも、プレートとストッパを用いることにより、芯筋と外筋のレベル差を容易に得ることができるとともに、プレートの下降に伴って外筋の下降を行えるので、作業性をより一層向上できる。
請求項３，４の発明では、外筋，芯筋にねじ筋を用い、ストッパとしてこれらねじ筋に螺合されるナットを用いるので、ストッパの位置調節を容易に行うことができる。また、外筋同士，芯筋同士の接続に、これらと螺合されるカプラーナットを用いるので、接続作業も楽である。
請求項５の発明によれば、補助フープ筋とストッパ棒を用いることにより、芯筋と外筋のレベル差を容易に得ることができるとともに、外筋の下降も容易に行えるので、作業性をより一層向上できる。
請求項６の発明によれば、上側の柱鉄筋篭の組立て時に予め外筋の下端レベルと芯筋の下端レベルに差を設けておくので、上側の柱鉄筋篭を吊り下げた状態で、芯筋同士を外筋に邪魔されずに容易に接続することができる。また、芯筋同士の接続が終わったら、中継筋を用いることで、上下の柱鉄筋篭の外筋同士を接続することができる。
【図面の簡単な説明】
【図１】本発明の第１実施例の準備状態を示し、（ａ）はこれから建て込もうとする柱鉄筋篭の縦断面図、（ｂ）はその水平断面図、（ｃ）は外フープ筋の平面図、（ｄ），（ｅ）は中子筋の平面図である。
【図２】同第１実施例の作業工程を（ａ）〜（ｃ）の順序で示す縦断面図である。
【図３】本発明の第２実施例の準備状態を示し、（ａ）はこれから建て込もうとする柱鉄筋篭の縦断面図、（ｂ）はその水平断面図である。
【図４】同第２実施例の作業工程を（ａ）〜（ｃ）の順序で示す縦断面図である。
【図５】本発明の第３実施例の準備状態を示し、（ａ）はこれから建て込もうとする柱鉄筋篭の縦断面図、（ｂ）はその水平断面図である。
【図６】同第３実施例の作業工程を（ａ）〜（ｃ）の順序で示す縦断面図である。
【図７】本発明の第４実施例の作業工程を（ａ）〜（ｃ）の順序で示す縦断面図である。
【図８】従来の建て込み方法を、（ａ），（ｂ）の順序で示す縦断面図である。
【符号の説明】
Ａ下側の柱鉄筋篭
Ｂ上側の柱鉄筋篭
１外筋
１ｂ外筋の下端
２芯筋
２ｂ芯筋の下端
３外フープ筋（剪断補強筋）
４中子筋（剪断補強筋）
６補助フープ筋
８中継筋
１０カプラーナット（継手）
１１ロックナット（継手）
１２プレート
１３挿通孔
１４ナット（ストッパ）
１６プレート
１７挿通孔
２０ストッパ棒[0001]
[Industrial application fields]
The present invention relates to a method for building a pre-assembled column reinforcement bar.
[0002]
[Prior art]
As shown in FIG. 8 (a), this type of pre-assembled column reinforcing bar rod includes an outer reinforcement 1 extending in the longitudinal direction (vertical direction), and a core reinforcement 2 disposed inside thereof and extending in parallel to the outer reinforcement 1. The outer hoop muscle 3 is assembled with shear reinforcement bars such as a core line (not shown). When building this pre-assembled column reinforcement bar, for example, as shown in FIG. 8A, the upper column reinforcement bar B is suspended by a crane and placed above the already installed lower column reinforcement bar A. In this state, the upper column reinforcement bar B is lowered, and the outer reinforcements 1 and the core reinforcements 2 of the lower and upper column reinforcement bars A and B are connected to each other as shown in FIG. Use to connect. When the outer reinforcement 1 and the core reinforcement 2 are threaded reinforcing bars, a coupler nut 10 and a lock nut 11 are used as joints.
[0003]
[Problems to be solved by the invention]
Conventionally, since the lower end level of the outer reinforcement 1 and the core reinforcement 2 of the column reinforcement bar B is at the same height, when connecting the core reinforcement 2, the work is performed from the gap of the outer reinforcement 1 Muscle 1 was in the way and the workability was poor. In particular, when many external muscles 1 are used and the gap between the external muscles 1 is narrow, the workability for connecting the core muscles 2 is extremely poor.
[0004]
In view of the above circumstances, an object of the present invention is to provide a method for erection of a pre-assembled column reinforcement bar that can easily perform a core rebar connection work and can improve workability.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a pre-assembled column assembled by an outer bar extending in the longitudinal direction, a core bar that is arranged inside and extends in parallel with the outer bar, and has the same length as the outer bar, and a shear reinforcing bar. When building up the reinforcing bar rod, place the upper column reinforcing rod rod in a suspended state above the already built lower column reinforcing rod rod, and connect the outer and upper reinforcing bars of the upper and lower column reinforcing rod rods together. In the method of building the pre-assembled column reinforcement bar to be connected to each other, the upper column reinforcement rod is assembled by making the outer and core bars movable relative to each other in the vertical direction. The upper end of the muscle is inserted into the insertion hole of the plate, and a stopper is provided above the plate at the upper end of the outer and core muscles, and the stopper provided on the core muscle is higher than the stopper provided on the outer muscle. Place the plate in this state, The lower bar level of the outer bar is positioned higher than the lower bar level of the core bar, and the core bars of the upper and lower column reinforcement bars are connected in this state, and then the plate is lowered. By doing so, the outer bars of the upper column reinforcement bars are lowered to connect the outer bars of the upper and lower column reinforcement bars .
[0007]
The invention according to claim 2 is a pre-assembled column assembled by an outer bar extending in the longitudinal direction, a core bar that is arranged inside thereof and extends in parallel with the outer bar and has the same length as the outer bar, and a shear reinforcing bar. When building up the reinforcing bar rod, place the upper column reinforcing rod rod in a suspended state above the already built lower column reinforcing rod rod, and connect the outer and upper reinforcing bars of the upper and lower column reinforcing rod rods together. In the method of building the pre-assembled column reinforcement bar that is connected to each other through the joint, the upper column reinforcement bar is assembled by making the core reinforcement movable in the vertical direction relative to the external reinforcement and the shear reinforcement. Place the plate on the shear reinforcement bar at the uppermost end of the heel, and insert the upper end of the core bar of the upper column reinforcement bar into the insertion hole of this plate. , by hanging the upper end of the outer muscles of the upper side of the pillar rebar cage The stopper of the core muscles to engage with the plate, whereby, is positioned above the lower end level of the core muscles lower end level of the outer muscles, connecting the core muscles between the upper and lower pillar rebar cage in this state, after the The upper column reinforcement bar is lowered and the outer bars of the upper and lower column reinforcement bars are connected to each other.
[0008]
A third aspect of the present invention, in like an anchor method previously set pillar reinforcement cage according to claim 1, the outer muscle and Shinsuji the vertical pillar reinforcement cage and screw rebar, the stopper these outer muscle, the core muscles The nut is screwed and the joint is a coupler nut screwed over the ends of the upper and lower outer bars or the upper and lower core bars.
According to a fourth aspect of the present invention, in the method for building a pre-assembled column reinforcement bar according to claim 2, the outer and upper bars of the upper and lower column reinforcement bars are screw reinforcements, and the stopper is screwed to the core reinforcement. The coupling is a coupler nut that is screwed over the ends of the upper and lower outer bars or the upper and lower core bars.
[0009]
The invention according to claim 5 is a pre-assembled column assembled by an outer bar extending in the longitudinal direction, a core bar that is arranged inside and extends in parallel with the outer bar, and has the same length as the outer bar, and a shear reinforcing bar. When building up the reinforcing bar rod, place the upper column reinforcing rod rod in a suspended state above the already built lower column reinforcing rod rod, and connect the outer and upper reinforcing bars of the upper and lower column reinforcing rod rods together. In the method of building the pre-assembled column reinforcement bar that is connected via a joint, the upper column reinforcement rod is assembled with the outer and core bars movable relative to each other in the vertical direction, and the auxiliary hoop bars are arranged on the outer periphery of the core reinforcement. Install and bind to the core reinforcing bar, and before hanging the upper column rebar bar, pass the stopper bar through this upper column bar bar at a predetermined distance below the auxiliary hoop bar, and suspend the upper column bar bar in this state. By locking the auxiliary hoop muscle with the stopper rod, the lower end of the outer muscle Bell is positioned above the lower end level of the core muscles, connecting the core muscles between the upper and lower pillar rebar cage in this state, after its lowers the upper pillar reinforcement cage with withdrawn stopper rod, the upper and lower pillar characterized by connecting the outer muscles together rebar cage.
[0010]
In the invention of claim 6, when the pre-assembled column reinforcing bar rod assembled by the outer reinforcement extending in the longitudinal direction, the core reinforcement arranged in parallel to the outer reinforcement and the shear reinforcement, is built. The upper column rebar rods are arranged in a suspended state above the already built lower column rebar rods, and the outer bars and core bars of the upper and lower column rebar rods are connected to each other through joints. In the method of building the column reinforcement bar, the upper reinforcement of the column reinforcement bar is made shorter than the core reinforcement, and the lower end level of the outer reinforcement is positioned higher than the lower end level of the core reinforcement. Assemble the bar and connect the upper bar reinforcing bar core to the lower bar reinforcing bar with the upper column reinforcing bar hanging, and then the lower end level of the outer bar and the lower end level of the core bar The outer bars of the upper and lower column reinforcement bars are connected to each other by a joint via a relay bar whose length is approximately equivalent to the difference between It is characterized in.
[0011]
[Action]
In the first aspect of the invention, at the stage where the core bars of the upper and lower column reinforcement bars are connected to each other, the lower end level of the outer reinforcement of the upper column reinforcement bar is above the lower end level of the core reinforcement. It is possible to perform the connecting work between the cores without being obstructed by. Moreover, the external reinforcement of the upper and lower column reinforcement bars can be connected by lowering the external reinforcement of the upper column reinforcement bars after the core reinforcement connection.
[0012]
Moreover, in the first aspect of the invention, when the plate is lifted, the stopper and the stopper are brought into contact with each other, so that both the outer muscle and the core are kept from falling. In this suspended state, the lower end level of the outer rebar is positioned above the lower end level of the rebar due to the difference between the positions of the stoppers of the outer rebar and the core rebar. Therefore, the core bars can be easily connected without being disturbed by the outer bars. After connecting the cores, suspend the plate. Then, the core muscle is fixed and does not move, but the outer muscle descends. Therefore, the outer bars of the upper and lower column reinforcement bars can be connected to each other. As described above, the level difference between the core and the external muscle can be easily obtained by using the plate and the stopper, and the external muscle can be lowered as the plate is lowered, so that the workability is good.
[0013]
According to the second aspect of the present invention, when the upper column reinforcement bar is lifted, the stopper provided on the core bar hits the plate and is held so that the core bar does not fall. In this suspended state, the lower end level of the outer reinforcement is positioned above the lower end level of the core reinforcement. Therefore, the core bars can be easily connected without being disturbed by the outer bars. Moreover, when the connection between the core reinforcing bars is finished, the upper column reinforcing bar rod is further suspended. Then, the core muscle does not move, but the outer muscle descends. Therefore, the upper outer muscle and the lower outer muscle can be connected to each other. As described above, the level difference between the core and the external muscle can be easily obtained using the plate and the stopper, and the external muscle can be easily lowered, so that the workability is good.
[0014]
In the third and fourth aspects of the present invention, since the screw bars are used for the outer bars and the core bars, and the nuts screwed to these screw bars are used as the stoppers, it is possible to easily adjust the position of the stoppers. Moreover, since the coupler nut screwed with these is used for the connection between the outer bars and the core bars, the connection work is also easy.
[0015]
In the fifth aspect of the invention, when the upper column reinforcement bar is lifted, the auxiliary hoop bars bound to the core bars hit the stopper bar and are held so that the core bars do not fall. Then, the auxiliary hoop line hits the stopper bar and stops, so that the lower end level of the outer line is positioned above the lower end level of the core line. Accordingly, the core bars can be easily connected without being disturbed by the outer bars in a state where the upper reinforcing bar rod is suspended. When the connection between the core bars is completed, pull out the stopper bar and suspend the upper rebar rod. Then, the core muscle is fixed and does not move, but the outer muscle descends. Therefore, the upper outer muscle and the lower outer muscle can be connected to each other. As described above, by using the auxiliary hoop muscle and the stopper bar, the level difference between the core muscle and the external muscle can be easily obtained, and the external muscle can be easily lowered, so that the workability is good.
[0016]
In the invention of claim 6, since a difference is provided in advance between the lower end level of the outer reinforcement and the lower end level of the core reinforcement when the upper column reinforcement reinforcement is assembled, the core reinforcements are in a state where the upper column reinforcement reinforcement is suspended. Can be easily connected without being obstructed by external muscles. Moreover, when the connection between the core bars is completed, the outer bars of the upper and lower column reinforcing bar rods can be connected by using the relay bars.
[0017]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment will be described with reference to FIGS. In the method of the first embodiment, as shown in FIG. 1, the column reinforcement bar A, the outer reinforcement 1, the core reinforcement 2, the outer hoop reinforcement 3 (shear reinforcement reinforcement), and the core reinforcement 4 (shear reinforcement reinforcement) are combined. Pre-assemble B. As shown particularly well in FIG. 1 (b), the outer reinforcement 1 is disposed on the outer periphery of the column reinforcement bars A and B and extends in the longitudinal direction thereof. The core muscle 2 is disposed inside the outer muscle 1 and extends parallel to the outer muscle 1. The outer reinforcement 1 and the core reinforcement 2 have the same length and are made of threaded reinforcing bars. As shown in FIG. 1C, the outer hoop line 3 is substantially square and is wound around the outer periphery of the outer line 1. The core muscle 4 has an elongated rectangular shape as shown in FIGS. 1D and 1E, and is arranged so as to intersect with each other. Each core bar 4 is wound around the outer bars 1 and the core bars 2 located on the sides of the column reinforcing bars A and B. In the other embodiments described later, the basic structures of the column reinforcing rods A and B are the same.
[0018]
The core muscle 2 and the core muscle 4, the core muscle 4 and the outer hoop muscle 3 are tightly bound with a thin metal wire (main binding), and the outer muscle 1 is loosely tied with the outer hoop muscle 3 and the core muscle 4. Either the outer muscle 1 is movable in the longitudinal direction with respect to the other muscles 2, 3, 4 without being bound at all. The outer muscle 1 is permanently bound to the outer hoop muscle 3 and the core muscle 4, and the core muscle 2 is not permanently bound to the core muscle 4, and the core muscle 2 is connected to the other muscles 1, 3, 4. However, it may be movable in the longitudinal direction. In short, it is only necessary that the outer reinforcement 1 and the core reinforcement 2 are relatively movable in the longitudinal direction in the assembled state.
[0019]
In this embodiment, the plate 12 having the insertion hole 13 is used to suspend the upper column reinforcement bar B. As shown in FIG. 1A, in the state where the column reinforcement bar B is erected on the floor F, the upper ends of the outer reinforcement 1 and the core reinforcement 2 are inserted through the insertion holes of the plate 12. A nut 14 (stopper) for preventing a drop having a diameter larger than that of the insertion hole 13 is screwed onto the upper ends of the outer bars 1 and the core bars 2 above the plate 12. Then, the level of the nut 14 screwed to the outer reinforcement 1 is set to be lower than the level of the nut 14 screwed to the core 2 by a predetermined dimension or more.
[0020]
In this state, when the plate 12 is lifted with a crane in a horizontal posture, the nut 14 strikes the plate 12 as shown in FIG. The Then, in such a state that the nut 14 is suspended and supported, the level of the lower end 1b of the outer bar 1 is positioned higher than the level of the lower end 2b of the core bar 2 according to the difference in the screwing position of the nut 14 described above. become. Therefore, in the state where it is suspended and supported as it is, by aligning the core reinforcing bar 2 of the upper column reinforcing bar B with the core reinforcing bar 2 of the lower column reinforcing bar A already installed, FIG. As shown in FIG. 2, the core bars 2 can be easily connected to each other using the coupler nut 10 and the lock nut 11 without being obstructed by the outer bars 1.
[0021]
Next, when the connection between the core reinforcing bars 2 is completed, the plate 12 is further suspended. Then, the core muscle 2 is fixed and does not move, but the outer muscle 1 is lowered as shown in FIG. Therefore, the upper external muscle 1 and the lower external muscle 1 can be aligned to connect the external muscles 1 to each other.
[0022]
In the present embodiment, the plate 12 and the nut 14 are used to simply secure the level difference between the external reinforcement 1 and the core reinforcement 2 and to lower the external reinforcement 1 after the connection of the core reinforcement 2 simply by suspending the column reinforcement bar B. Can be realized.
[0023]
Next, a second embodiment will be described with reference to FIGS. In the method of the second embodiment, as shown in FIG. 3, when the column reinforcement bar B is pre-assembled, the outer muscle 1 and the outer hoop muscle 3, the outer muscle 1 and the core muscle 4 are respectively bound together, The core muscle 2 and the core muscle 4 are not bound at all or are not permanently bound, and the core muscle 2 is allowed to move freely in the longitudinal direction (vertical direction) with respect to the other muscles 1, 3, 4. A plate 16 having an insertion hole 17 is fixed to the uppermost core 4. The plate 16 may simply be placed on the core muscle 4. The upper end portion of the core reinforcement 2 is inserted through the insertion hole 17 of the plate 16. A nut 14 (stopper) having a diameter larger than that of the insertion hole 17 is screwed onto the upper end portion of the core reinforcement 2 above the plate 16. The screwing position of the nut 14 is a position above the plate 16 by a predetermined dimension when the lower ends of the outer bar 1 and the core bar 2 are matched.
[0024]
In such a state, when the external reinforcement 1 is lifted by a crane through the clamp 19, the nut 14 screwed into the core reinforcement 1 hits the plate 16 so that the core reinforcement 2 does not fall, as shown in FIG. Retained. In the state of being supported in such a manner, the level of the lower end 1b of the outer bar 1 is positioned higher than the level of the lower end 2b of the core bar 2 depending on the screwing position of the nut 14. Accordingly, in the state where the suspension is supported as it is, by aligning the core reinforcement 2 of the upper column reinforcement bar B and the core reinforcement 2 of the lower column reinforcement bar A, as shown in FIG. The core bars 2 can be easily connected to each other using the coupler nut 10 and the lock nut 11 without being disturbed by the line 1.
[0025]
Next, when the connection between the core reinforcing bars 2 is completed, the upper column reinforcing bar B is further suspended. Then, the core muscle 2 is fixed and does not move, but the outer muscle 1 descends. Therefore, as shown in FIG.4 (c), the upper external muscle 1 and the lower external muscle 1 can be aligned, and the external muscles 1 can be connected.
[0026]
In the present embodiment, the level difference between the external reinforcement 1 and the core reinforcement 2 can be easily secured by simply suspending the column reinforcement bar B using the plate 16 and the nut 14, and the external reinforcement 1 after the connection of the core reinforcement 2 can be secured. The descent can be easily realized.
[0027]
Next, a third embodiment will be described with reference to FIGS. In the method of the third embodiment, as in the second embodiment, when the column reinforcement bar B is pre-assembled, the core reinforcement 2 can be moved in the vertical direction with respect to the other reinforcements 1, 3, 4. deep. Then, the auxiliary hoop muscles 6 are bound at two locations in the vertical direction of the core reinforcement 2, and the stopper bar 20 is horizontally inserted between the outer hoop muscles 3 below a predetermined dimension from the lower auxiliary hoop muscle 6.
[0028]
In this state, when the external reinforcement 1 is lifted by a crane through the clamp 19, the auxiliary hoop reinforcement 6 bound to the core reinforcement 2 hits the stopper bar 20 as shown in FIG. It is held so as not to fall. Then, as a result of being suspended and supported in this manner, the auxiliary hoop muscle 6 hits the stopper bar 20 and stops, so that the level of the lower end 1b of the outer muscle 1 is positioned above the level of the lower end 2b of the core muscle 2. Accordingly, in the state where the suspension is supported as it is, by aligning the core reinforcement 2 of the upper column reinforcement bar B and the core reinforcement 2 of the lower column reinforcement bar A, as shown in FIG. The core bars 2 can be easily connected to each other using the coupler nut 10 and the lock nut 11 without being disturbed by the line 1.
[0029]
When the connection between the core reinforcing bars 2 is completed, as shown in FIG. 6C, after the stopper bar 20 inserted between the outer hoop bars 3 is pulled out, the upper column reinforcement bar B is suspended. Then, the core muscle 2 is fixed and does not move, but the outer muscle 1 descends. Therefore, the upper external muscle 1 and the lower external muscle 1 can be aligned to connect the external muscles 1 to each other.
[0030]
Also in this embodiment, the level difference between the external reinforcement 1 and the core reinforcement 2 can be easily secured by simply suspending the column reinforcement bar B using the auxiliary hoop reinforcement 6 and the stopper bar 20 bound to the core reinforcement 2. By pulling out the stopper rod 20, the lowering of the outer muscle 1 can be easily realized.
[0031]
Next, a fourth embodiment will be described with reference to FIG. In the method of the fourth embodiment, when the column reinforcement bar B is pre-assembled, the outer muscle 1 is shorter than the core muscle 2, and in the bound state, the level of the lower end 1b of the outer muscle 1 and the core reinforcement A difference is provided in the level of the lower end 2b of 2. All the muscles 1 to 4 are permanently bound to each other. By doing so, when the column reinforcement bar B is suspended, the core bars 2 can be easily connected to each other without being disturbed by the outer bars 1 as shown in FIGS. it can. When the connection between the core reinforcing bars 2 is completed, the relay bar (the outer bar 1 of the outer bar 1 is connected between the lower end 1b of the outer bar 1 of the upper column reinforcement bar B and the upper end 1a of the outer bar 1 of the lower column bar bar A. 7), the upper and lower outer bars 1 are connected to each other through the relay bar 8, the coupler nut 10 , and the lock nut 11, as shown in FIG. Thereby, the upper and lower column reinforcement bars A and B can be connected.
[0032]
【The invention's effect】
As described above, according to the inventions of claims 1 and 2 , since the lower end level of the upper reinforcement of the upper column reinforcement bar is above the lower end level of the core reinforcement, the core reinforcements are not disturbed by the outer reinforcement. Can be connected. Moreover, the external reinforcement of the upper and lower column reinforcement bars can be connected by lowering the external reinforcement of the upper column reinforcement bars after the core reinforcement connection. In addition, by using the plate and the stopper, it is possible to easily obtain the level difference between the core muscle and the external muscle, and the external muscle can be lowered as the plate is lowered, so that the workability can be further improved.
In the third and fourth aspects of the present invention, since the screw bars are used for the outer bars and the core bars, and the nuts screwed to these screw bars are used as the stoppers, it is possible to easily adjust the position of the stoppers. Moreover, since the coupler nut screwed with these is used for the connection between the outer bars and between the core bars, the connection work is also easy.
According to the invention of claim 5, by using the auxiliary hoop muscle and the stopper bar, the level difference between the core muscle and the external muscle can be easily obtained, and the external muscle can be easily lowered, so that workability is improved. It can be further improved.
According to the invention of claim 6, since the difference between the lower end level of the outer bar and the lower end level of the core bar is provided in advance when the upper column bar bar is assembled, the core bar is suspended while the upper column bar bar is suspended. The muscles can be easily connected without being disturbed by the external muscles. Moreover, when the connection between the core bars is completed, the outer bars of the upper and lower column reinforcing bar rods can be connected by using the relay bars.
[Brief description of the drawings]
FIG. 1 shows a preparatory state of a first embodiment of the present invention, where (a) is a longitudinal sectional view of a column reinforcing bar to be built, (b) is a horizontal sectional view thereof, and (c) is an outer hoop. Plan views of the muscles, (d) and (e) are plan views of the core muscles.
FIG. 2 is a longitudinal sectional view showing work steps of the first embodiment in the order of (a) to (c).
FIGS. 3A and 3B show a preparation state of a second embodiment of the present invention, in which FIG. 3A is a longitudinal sectional view of a column reinforcing bar to be built and FIG. 3B is a horizontal sectional view thereof.
FIG. 4 is a longitudinal sectional view showing work steps of the second embodiment in the order of (a) to (c).
5A and 5B show a preparatory state of a third embodiment of the present invention, in which FIG. 5A is a longitudinal sectional view of a column reinforcing bar to be built and FIG. 5B is a horizontal sectional view thereof.
FIG. 6 is a longitudinal sectional view showing work steps of the third embodiment in the order of (a) to (c).
FIG. 7 is a longitudinal sectional view showing work steps of a fourth embodiment of the present invention in the order of (a) to (c).
FIG. 8 is a longitudinal sectional view showing a conventional embedding method in the order of (a) and (b).
[Explanation of symbols]
A Lower column reinforcement rod B Upper column reinforcement rod 1 Outer reinforcement 1b Lower end of outer reinforcement 2 Core reinforcement 2b Lower end of core reinforcement 3 External hoop reinforcement (shear reinforcement)
4 Core core (shear reinforcement)
6 Auxiliary hoop bar 8 Relay bar 10 Coupler nut (joint)
11 Lock nut (Fitting)
12 Plate 13 Insertion hole 14 Nut (stopper)
16 Plate 17 Insertion hole 20 Stopper bar

Claims

When building a pre-assembled column reinforcement bar assembled with a longitudinally extending outer bar, a core bar that is arranged inside and extends parallel to the outer bar, and has the same length as the outer bar, and a shear reinforcement bar In addition, the upper column reinforcement bar 篭 is arranged in a suspended state above the already installed lower column reinforcement bar, and the outer bars and core bars of the upper and lower column reinforcement bars are connected to each other through joints. In the method of building the pre-assembled column reinforcement bar,
Assemble the upper column reinforcement bar with outer and core bars moving relative to each other in the vertical direction.
The upper bars of the upper column reinforcement bars and the upper ends of the core bars are inserted into the plate insertion holes, and stoppers are provided on the upper bars of the outer bars and the core bars above the plate. Place the stopper provided on the core bar at a higher position,
In this state, the plate is suspended, and the stopper is locked to the plate, so that the lower end level of the outer reinforcement is positioned higher than the lower end level of the core reinforcement. Connect
After that, by lowering the plate, the outer reinforcement of the upper column reinforcement bar is lowered and the outer reinforcements of the upper and lower column reinforcement bars are connected to each other .

When building a pre-assembled column reinforcement bar assembled with a longitudinally extending outer bar, a core bar that is arranged inside and extends parallel to the outer bar, and has the same length as the outer bar, and a shear reinforcement bar In addition, the upper column reinforcement bar 篭 is arranged in a suspended state above the already installed lower column reinforcement bar, and the outer bars and core bars of the upper and lower column reinforcement bars are connected to each other through joints. In the method of building the pre-assembled column reinforcement bar,
Assemble the upper column reinforcement bar with the core bar moving vertically relative to the outer bar and the shear reinforcement bar,
Place the plate on the uppermost shear reinforcement bar of the upper column reinforcement bar, insert the upper end of the core reinforcement of the upper column reinforcement bar into the insertion hole of this plate, and keep the core bar above the plate by a predetermined distance. Stop the upper bar of the upper column rebar bar and suspend the upper bar of the upper bar to the plate, so that the lower end level of the outer bar is higher than the lower end level of the core bar. In this state, connect the core bars of the upper and lower column reinforcement bars,
As after, it lowers the upper column rebar cage, a method like an anchor of the previous sets pillar rebar cage, characterized in that for connecting the outer muscle between the upper and lower pillar reinforcement cage.

The external bars and core bars of the upper and lower column reinforcement bars are threaded bars, the stopper is a nut that is screwed to these external bars and core bars, and the joint is screwed over the ends of the upper and lower outer bars or the upper and lower core bars. 2. The method for erection of a pre-assembled column reinforcement bar according to claim 1 , wherein a coupler nut is used.

The external bars and core bars of the upper and lower column reinforcement bars are screw bars, the stopper is a nut screwed to the core bars, and the joint is screwed over the ends of the upper and lower outer bars or the upper and lower core bars. 3. The method for erection of the pre-assembled column reinforcement bar according to claim 2, wherein a coupler nut is used.

When building a pre-assembled column reinforcement bar assembled with a longitudinally extending outer bar, a core bar that is arranged inside and extends parallel to the outer bar, and has the same length as the outer bar, and a shear reinforcement bar In addition, the upper column reinforcement bar 篭 is arranged in a suspended state above the already installed lower column reinforcement bar, and the outer bars and core bars of the upper and lower column reinforcement bars are connected to each other through joints. In the method of building the pre-assembled column reinforcement bar,
Assemble the upper column reinforcement bar with outer and core bars moving relative to each other in the vertical direction.
Auxiliary hoop bars are arranged on the outer periphery of the core bars and bound with the core bars, and before the upper column reinforcement bar is suspended, a stopper rod is passed through the upper column reinforcement bar at a predetermined distance below the auxiliary hoop bars. In this state, the upper column reinforcement bar is suspended, and the auxiliary hoop bar is locked by the stopper bar, so that the lower end level of the outer bar is positioned above the lower end level of the core bar, and in this state, the upper and lower columns Connect the cores of the reinforcing rods,
After that, with withdrawn stopper rod lowers the upper column rebar cage, previously set column rebar cage like an anchor method characterized by connecting the outer muscle between the upper and lower pillar reinforcement cage.

When building the pre-assembled column reinforcement bar assembled with the outer reinforcement extending in the longitudinal direction, the core reinforcement arranged inside and extending parallel to the outer reinforcement, and the shear reinforcement, A built-in pre-assembled column reinforcement bar that hangs the upper column reinforcement bar above the side column reinforcement bar and connects the upper and lower column reinforcement bars to each other via joints. In the method
Assemble the upper column reinforcing bar rod so that the outer reinforcement of the upper column reinforcement rod is shorter than the core reinforcement and the lower end level of the outer reinforcement is positioned above the lower end level of the core reinforcement,
With the upper column reinforcing bar rod suspended, connect the upper column reinforcing rod rod core to the lower column reinforcing rod rod core,
After that, the pre-assembled column is characterized in that the outer bars of the upper and lower column reinforcement bars are connected by a joint through a relay bar having a length substantially corresponding to the difference between the lower level of the outer bar and the lower level of the core bar. How to build a reinforcing bar.