JP4005387B2

JP4005387B2 - Reinforcing bar fixing method and fixing tool used in the method

Info

Publication number: JP4005387B2
Application number: JP2002059416A
Authority: JP
Inventors: 茂樹運上; 順一星隈; 亮彦塩島
Original assignee: Public Works Research Institute; Maeda Corp; Toda Corp; Tokyu Construction Co Ltd; Sumitomo Mitsui Construction Co Ltd
Current assignee: Maeda Corp; Toda Corp; Tokyu Construction Co Ltd; Sumitomo Mitsui Construction Co Ltd; National Research and Development Agency Public Works Research Institute
Priority date: 2002-03-05
Filing date: 2002-03-05
Publication date: 2007-11-07
Anticipated expiration: 2022-03-05
Also published as: JP2003253814A

Description

【０００１】
【発明の属する技術分野】
この発明は、鉄筋コンクリート橋脚、建築物の鉄筋コンクリート柱など鉄筋コンクリート構造物の断面内部に配置される帯鉄筋や軸方向鉄筋のはらみだしを抑制するための配筋定着方法及び該方法に用いられる定着具に関するものである。
【０００２】
【従来の技術】
鉄筋コンクリート構造物、例えば図１１に示す鉄筋コンクリート柱１においては、大地震時に塑性化することを考慮して耐震設計しており、その耐震性を高めるため、該柱の断面内部に配置される中間帯鉄筋４を、その両端部に形成した半円形フックもしくは鋭角フック５を帯鉄筋３に引っ掛けて定着させている。これにより帯鉄筋３や軸方向鉄筋２の外側へのはらみだしを抑制する構造となっている。しかしながら、中間帯鉄筋４の両端部に半円形フックもしくは鋭角フック５を形成して帯鉄筋３に引っ掛けるのは、施工上非常に難しい。そのため、図１２（Ａ）に示すように２本の鉄筋４ａ，４ｂを断面内部で一部重ね合わせて中間帯鉄筋４としたり、同（Ｂ）に示すように対向端部を機械式継手４ｃ等を用いて接続して中間帯鉄筋４とする構造が従来より用いられている。
【０００３】
ところで、２本の鉄筋を断面内部で重ね合わせて中間帯鉄筋とする方法では、断面内部で鉄筋が輻輳するため、施工が煩雑となるという問題点がある。また、機械式継手等で接続して中間帯鉄筋とする方法では、別途継手等を用意する必要があるため、コストアップとなるという問題点がある。
【０００４】
【発明が解決しようとする課題】
そこでこの発明は、前記のような従来の問題点を解決し、１本の鉄筋で中間帯鉄筋の帯鉄筋への定着が確実に行え、その施工性も従来に比して格段に改善することができ、コストも比較的安価に抑えることができる配筋定着方法及び該方法に用いられる定着具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】
前記目的を達成するため、請求項１に記載した配筋定着方法の発明は、鉄筋コンクリート橋脚、建築物の鉄筋コンクリート柱など鉄筋コンクリート構造物の断面内部においてその外周に配置される軸方向鉄筋や、これら軸方向鉄筋を外側から囲むように接して軸方向鉄筋と交叉する向きに配置される帯鉄筋のはらみだしを抑制するための配筋定着方法であって、定着具の一端部に形成した係合孔を前記帯鉄筋の相対向する位置に端部を定着させて配置される中間帯鉄筋に予め通して係合させておく一方、前記中間帯鉄筋の端部にほぼ直角に折り曲げ形成されたフック部を帯鉄筋に引っ掛けて配筋した後、前記定着具の他端部に形成した係合孔を前記フック部にその先端側から通して係合することにより中間帯鉄筋を帯鉄筋に定着させることを特徴とする。
【０００６】
請求項２に記載した定着具の発明は、請求項１の配筋定着方法に用いられるもので、一端部に予め中間帯鉄筋に通して係合可能な係合孔が形成され、他端部に中間帯鉄筋のフック部にその先端側から通して係合可能な係合孔が形成されていることを特徴とする。請求項３に記載した定着具の発明は、請求項２において、一端部に形成された係合孔と他端部に形成された係合孔が互いに連通する１個のリング体からなっていることを特徴とする。
【０００７】
請求項４に記載した配筋定着方法の発明は、鉄筋コンクリート橋脚、建築物の鉄筋コンクリート柱など鉄筋コンクリート構造物の断面内部においてその外周に配置される軸方向鉄筋や、これら軸方向鉄筋を外側から囲むように接して軸方向鉄筋と交叉する向きに配置される帯鉄筋のはらみだしを抑制するための配筋定着方法であって、前記帯鉄筋の相対向する位置に端部を定着させて配置される中間帯鉄筋の端部にほぼ直角に折り曲げ形成されたフック部を帯鉄筋に引っ掛けて配筋した後、定着具の一端部に形成した係合孔を前記フック部にその先端側から通して係合するとともに、定着具の他端部に形成した係合フックを中間帯鉄筋に引っ掛けて係合することにより中間帯鉄筋を帯鉄筋に定着させることを特徴とする。
【０００８】
請求項５に記載した定着具の発明は、請求項４の配筋定着方法に用いられるもので、一端部に中間帯鉄筋のフック部にその先端側から通して係合する係合孔が形成され、他端部に該中間帯鉄筋に引っ掛けて係合する係合フックが形成されていることを特徴とする。請求項６に記載した定着具の発明は、請求項４の配筋定着方法に用いられるもので、中間部で１８０°反転するように捻られ、一端部に中間帯鉄筋のフック部にその先端側から通して係合する係合孔が形成され、他端部に前記捻りによりばね性が付与されて開閉可能となり、該中間帯鉄筋に引っ掛けて係合する１対の係合フックが形成されていることを特徴とする。
【０００９】
請求項７に記載した定着具の発明は、請求項４の配筋定着方法に用いられるもので、リング体を具え、該リング体の一端部に中間帯鉄筋のフック部にその先端側から通して係合する係合孔が形成され、他端部に該中間帯鉄筋に引っ掛けて係合する係合フックが形成され、この係合フックは、前記リング体の一部に、外部負荷がかかると内側に傾動して開き、外部負荷がかからないと元の位置に復帰して閉じる開閉片を有することを特徴とする。請求項８に記載した定着具の発明は、請求項４の配筋定着方法に用いられるもので、Ｕ字状の本体を具え、該本体の閉塞側一端部に中間帯鉄筋のフック部にその先端側から通して係合する係合孔が形成され、他端部に該中間帯鉄筋に引っ掛けて係合する係合フックが形成され、この係合フックは、前記本体の他端部を閉塞する閉塞具を有することを特徴とする。
【００１０】
請求項９に記載した配筋定着方法の発明は、鉄筋コンクリート橋脚、建築物の鉄筋コンクリート柱など鉄筋コンクリート構造物の断面内部においてその外周に配置される軸方向鉄筋や、これら軸方向鉄筋を外側から囲むように接して軸方向鉄筋と交叉する向きに配置される帯鉄筋のはらみだしを抑制するための配筋定着方法であって、定着具の一端部に形成した係合孔を予め帯鉄筋に通して係合させておく一方、前記帯鉄筋の相対向する位置に端部を定着させて配置される中間帯鉄筋の端部にほぼ直角に折り曲げ形成されたフック部を前記定着具の他端部に形成した係合孔に引っ掛けて係合させることにより中間帯鉄筋を帯鉄筋に定着させることを特徴とする。
【００１１】
請求項１０に記載した定着具の発明は、請求項９の配筋定着方法に用いられるもので、帯鉄筋に予め係合される係合孔を有する第１のリング部と、該リング部に連結され、中間帯帯鉄筋の端部にほぼ直角に折り曲げ形成されたフック部がその先端側から係合される係合孔を有する第２のリング部とを具えたことを特徴とする。
【００１２】
請求項１１に記載した配筋定着方法の発明は、鉄筋コンクリート橋脚、建築物の鉄筋コンクリート柱など鉄筋コンクリート構造物の断面内部においてその外周に配置される軸方向鉄筋や、これら軸方向鉄筋を外側から囲むように接して軸方向鉄筋と交叉する向きに配置される帯鉄筋のはらみだしを抑制するための配筋定着方法であって、前記帯鉄筋の相対向する位置に端部を定着させて配置される中間帯鉄筋の端部にほぼ直角に折り曲げ形成されたフック部を含む端部に定着具を被着した後、該定着具を被着した中間帯鉄筋のフック部を帯鉄筋に引っ掛けて配筋することにより中間帯鉄筋を帯鉄筋に定着させることを特徴とする。
【００１３】
請求項１２に記載した定着具の発明は、請求項１１の配筋定着方法に用いられるもので、側面からみて略Ｌ型を呈し、底面の長さ方向全長に中間帯鉄筋のフック部を含む端部を上面及び側面から覆って被着可能な凹所を有することを特徴とする。
【００２１】
【発明の実施の形態】
この発明の実施の形態を、添付図面を参照して説明する。図１〜図４は第１の実施の形態を示す。図１は図１１，１２に示すような鉄筋コンクリート柱の断面内部に多数配置される軸方向鉄筋、帯鉄筋及び中間帯鉄筋のうち、説明の便宜上、１組を抽出して表わしたものである。図において、２は軸方向鉄筋、３は帯鉄筋、４は中間帯鉄筋をそれぞれ示し、ここでは定着具として金属コネクタ１０を用いて中間帯鉄筋４を帯鉄筋３に定着する方法が図示されている。
【００２２】
コネクタ１０は図２に示すように１個の扁平金属製リング体１１からなっている。リング体１１は長さ方向に中間帯鉄筋４や帯鉄筋３が挿通可能な大きさの孔部１２を有し、該孔部は一端部に形成された係合孔１３と他端部に形成された係合孔１４が互いに連通することにより形成されている。また中間帯鉄筋４の端部にはフック部７がほぼ直角に折り曲げて形成されている。フック部７の長さはリング体１１の孔部１２の長さよりは小さくなっている。
【００２３】
コネクタ１０を用いて中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ１０の係合孔１３を予めフック部７の先端側から中間帯鉄筋４に通して係合孔１４が下向きとなる垂下状に係合させておく（図１左図）。そして、このコネクタ１０を係合させた中間帯鉄筋４のフック部７をその先端が下向きとなるように帯鉄筋３に引っ掛けて配筋する。しかる後、コネクタ１０の係合孔１４を矢印で示すようにフック部７にその先端側から係合する（図１右図）。これにより帯鉄筋３が中間帯鉄筋４とコネクタ１０で拘束され、中間帯鉄筋４は帯鉄筋３に定着させられる。そして、コンクリートを打設前に中間帯鉄筋４とコネクタ１０の両端部を針金１５等で結わえてコネクタ１０が脱落しないようにするが、この作業は以下に説明する変形例、第２の実施の形態以降の実施の形態においても同様である。
【００２４】
図３は図１，２の変形例を示し、この例では一端部に係合孔１６が形成され、他端部に係合フック１７が形成された金属コネクタ１８を用いている。コネクタ１８を用いて中間帯鉄筋４を帯鉄筋３に定着するには中間帯鉄筋４の端部にほぼ直角に折り曲げ形成されたフック部７をその先端が下向きとなるように帯鉄筋３に引っ掛けて配筋した後、コネクタ１８の係合孔１６を中間帯鉄筋４のフック部７にその先端側から通して係合するとともに、係合フック１７を中間帯鉄筋４に引っ掛けて係合する。これにより帯鉄筋３が中間帯鉄筋４とコネクタ１８で拘束され、中間帯鉄筋４は帯鉄筋３に定着させられる。
【００２５】
図４（Ａ），（Ｂ），（Ｃ）は図３の配筋定着方法に用いられる金属コネクタの変形例を示すものである。図４（Ａ）のコネクタ２１は中間部で１８０°反転するように捻られ、一端部に係合孔２２が形成され、他端部に前記捻りによりばね性が付与されて開閉可能となった１対の係合フック２３が形成されている。中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ２１の係合孔２２を中間帯鉄筋４のフック部７にその先端側から通して係合するとともに、係合フック２３を開き中間帯鉄筋４に引っ掛けたうえで閉じて係合する。
【００２６】
図４（Ｂ）のコネクタ２５はリング体２６を具え、該リング体の一端部に係合孔２７が形成され、他端部に係合フック２８が形成されている。係合フック２８は開閉片２９をリング体２６の一部に有している。すなわち、開閉片２９は一端が枢支ピン３０で枢支され、図示しない引っ張りばねにより常時は図示のように閉じる位置に付勢されており、外部負荷がかかるとリング体２６の内側に傾動して開き、外部負荷がかからないと前記ばねにより元の閉じる位置に復帰する。開閉片２９の他端面は斜面に形成され、対応するリング体２６の端面に形成された斜面に突き合って係合可能になっている。このコネクタ２５により中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ２５の係合孔２７を中間帯鉄筋４のフック部７にその先端側から通して係合するとともに、係合フック２８を、開閉片２９を中間帯鉄筋４に押し当て開いて引っ掛けたうえで閉じて係合する。
【００２７】
図４（Ｃ）のコネクタ３２はＵ字状の本体３３を具え、該本体の閉塞側一端部に係合孔３４が形成され、他端部に係合フック３５が形成されている。係合フック３５は本体３３の他端部を閉塞する閉塞具３６を有している。この閉塞具３６は本体３３の他端部に設けた図示しない取付孔に挿通されたボルト３６ａと、該ボルトに螺合するナット３６ｂとからなっている。このコネクタ３２により中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ３２の係合孔３４を中間帯鉄筋４のフック部７にその先端側から通して係合するとともに、閉止具３６をその取付前の本体３３の開放側他端部を中間帯鉄筋４に通した後にボルト３６ａを前記取付孔に挿通し、ナット３６ｂを螺合して締め付けることにより取り付ける。これにより閉塞具３６が係合フック３５を形成し、該フックを中間帯鉄筋４に引っ掛けて係合する。
【００２８】
図５は第２の実施の形態を示す。この実施の形態では係合孔３８を有する第１のリング部３９と、該リング部に連結され、係合孔４０を有する第２のリング部４１を具えた金属コネクタ４２を用いている。コネクタ４２を用いて中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ４２の係合孔３８を予め帯鉄筋３に通して係合させておく。そして、中間帯鉄筋４のフック部７をその先端が下向きとなるようにコネクタ４２の係合孔４０に引っ掛けて係合する。これにより中間帯鉄筋４は帯鉄筋３に定着される。
【００２９】
図６は第３の実施の形態を示す。この実施の形態では中間帯鉄筋４の端部にフック部７を一部含んで取り付けられた側面からみて略Ｌ型で、かつ断面が略コ字状の金属コネクタ４３を用いている。コネクタ４３は中間帯鉄筋４を上面及び側面から覆って被着可能な凹所４４をその底面の長さ方向全長に有し、該凹所に中間帯鉄筋４が嵌るように被着される。このコネクタ４３を用いて中間帯鉄筋４を帯鉄筋３に定着するにはコネクタ４３を図示のように中間帯鉄筋４の端部に被着する。そして、このコネクタ４３を被着した中間帯鉄筋４のフック部７を帯鉄筋３に引っ掛けて配筋する。これにより帯鉄筋３が中間帯鉄筋４とコネクタ４３で拘束され、中間帯鉄筋４は帯鉄筋３に定着させられる。
【００３０】
図７は第４の実施の形態を示す。この実施の形態では第１の実施の形態で示したコネクタ１０を用いている。このコネクタ１０を用いて帯鉄筋３を軸方向鉄筋２に定着するにはコネクタ１０の係合孔１３を予め帯鉄筋３に係合させておく。そして、帯鉄筋３の端部にほぼ直角に折り曲げ形成されたフック部４５を軸方向鉄筋２に引っ掛けて配筋した後、コネクタ１０の他端部に形成した係合孔１４を帯鉄筋３のフック部４５にその先端側から係合する。これにより軸方向鉄筋２が帯鉄筋３とコネクタ１０で拘束され、帯鉄筋３は軸方向鉄筋２に定着させられる。
【００３１】
図８は第５の実施の形態を示す。この実施の形態では中間帯鉄筋４の端部にほぼ直角に折り曲げ形成されたフック部４６、さらにその先端部に同様にほぼ直角に折り曲げ形成されたフック部４７からなって略Ｕ字状に屈曲された、前記フック部４６と帯鉄筋３をクリップすることが可能な大きさの軸方向孔４８が形成された本体５０を具え、該本体にはフック部４６又は帯鉄筋３を軸方向孔４８に通すための軸方向開口部５１が切欠形成されている金属クリップ５２を用いている。このクリップ５２を用いて中間帯鉄筋４を帯鉄筋３に定着するには中間帯鉄筋４のフック部４６を帯鉄筋３に添うように当接させて配筋した後、該フック部と帯鉄筋３を本体５０の軸方向孔４８に通して同図（Ｂ）のようにクリップする。このクリップはフック部４６と帯鉄筋３を摩擦力により圧接することにより行うが、他の方法で行ってもよい。これにより帯鉄筋３が中間帯鉄筋４とクリップ５２で拘束され、中間帯鉄筋４は帯鉄筋３に定着させられる。
【００３２】
図９は第６の実施の形態を示す。この実施の形態では全体が線材からなり、一端部に第１の帯鉄筋３ａのフック部５５と第２の帯鉄筋３ｂの当接部を係合する係合部５６が形成され、他端部に第２の帯鉄筋３ｂのフック部５７と第１の帯鉄筋３ａの当接部を係合する係合部５８が形成されている金属コネクタ６０を用いている。このコネクタ６０を用いて帯鉄筋３ａ，３ｂを軸方向鉄筋２に定着するには第１の帯鉄筋３ａのフック部５５を軸方向鉄筋２に引っ掛けて配筋するとともに、第２の帯鉄筋３ｂのフック部５７を第１の帯鉄筋３ａのフック部５５と反対側から軸方向鉄筋２に上下に添うように当接させて引っ掛けて配筋した後、第１の帯鉄筋３ａのフック部５５と第２の帯鉄筋３ｂ及び第２の帯鉄筋３ｂのフック部５７と第１の帯鉄筋３ａをコネクタ６０の一端部及び他端部に形成した係合部５６，５８で係合する。これにより第１の帯鉄筋３ａと第２の帯鉄筋３ｂが軸方向鉄筋２に定着させられる。
【００３３】
図１０は第７の実施の形態を示す。この実施の形態では第１の帯鉄筋３ａのフック部５５と第２の帯鉄筋３ｂ又は第２の帯鉄筋３ｂのフック部５７と第１の帯鉄筋３ａをクリップすることが可能な大きさの軸方向孔６２が形成された本体６３を具え、該本体にはフック部又は帯鉄筋を軸方向孔６２に通すための軸方向開口部６４が切欠形成されている金属クリップ６５を用いている。このクリップ６５を用いて帯鉄筋３ａ，３ｂを軸方向鉄筋２に定着するには第１の帯鉄筋３ａのフック部５５を軸方向鉄筋２に引っ掛けて配筋するとともに、第２の帯鉄筋３ｂのフック部５７を第１の帯鉄筋３ａのフック部５５と反対側から軸方向鉄筋２に上下に添うように当接させて引っ掛けて配筋した後、第１の帯鉄筋３ａのフック部５５と第２の帯鉄筋３ｂをクリップ６５で同図（Ｂ）のようにクリップする。このクリップもフック部５５と帯鉄筋３ｂを摩擦力により圧接することにより行うが、他の方法で行ってもよい。これにより第１の帯鉄筋３ａと第２の帯鉄筋３ｂが軸方向鉄筋２に定着させられる。この場合、クリップ６５でクリップするのは第２の帯鉄筋３ｂのフック部５７と第１の帯鉄筋３ａとしてもよく、あるいは両方をクリップしてもよい。
【００３４】
尚、前記各実施の形態では定着具として金属コネクタ１０，１８，２１，２５，３２，４２，４３，６０又は金属クリップ５２，６５を挙げて説明したが、これはあくまでも好ましい一例であり、このような金属コネクタ又は金属クリップに限定するものではない。また、材質も必ずしも金属（鋼材）である必要はなく、ほかに例えばＦＲＰ、繊維材等を用いたものでもよい。また、実施の形態で示した金属コネクタ又は金属クリップの具体的な形状、構造などは実施に際し種々に設計変更、修正してもよいことは勿論である。また、前記各実施の形態では鉄筋コンクリート柱を例として説明したが、種々の鉄筋コンクリート構造物にも適用ができる
【００３５】
【発明の効果】
この発明は前記のようであって、請求項１，４，９，１１に記載した配筋定着方法によれば、１本の鉄筋で中間帯鉄筋の帯鉄筋への定着がきわめて容易かつ確実に行えて、施工性が従来のものに比して格段に改善することができる。したがって、大地震時の大きな塑性変形によって鉄筋コンクリート柱のかぶりコンクリートが剥離しても、コアコンクリートが帯鉄筋に定着された中間帯鉄筋により拘束されるため、帯鉄筋や軸方向鉄筋の外側へのはらみだしを抑制でき、被害を最小限に抑えることが可能となり、耐震性に優れたものとなる。また、従来のように機械的継手等を使用しないため、コストも比較的安価に抑えることができる。さらに、請求項２，３，５，６，７，８，１０，１２に記載した定着具によれば、前記配筋定着方法を実施するに当り、その施工性を高める役目を果たすことができるという優れた効果がある。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態を示す、要部斜視図である。
【図２】同上の定着金具の正面図である。
【図３】同上の変形例を示す、要部斜視図である。
【図４】同上の変形例で用いる定着金具の各種変形例を示す正面図である。
【図５】第２の実施の形態を示す、要部斜視図である。
【図６】（Ａ）は第３の実施の形態を示す、要部斜視図、（Ｂ）は（Ａ）の線Ｂ−Ｂに沿う断面図である。
【図７】第４の実施の形態を示す、要部斜視図である。
【図８】（Ａ）は第５の実施の形態を示す、要部斜視図、（Ｂ）は（Ａ）の線Ｂ−Ｂに沿う断面図である。
【図９】第６の実施の形態を示す、要部斜視図である。
【図１０】（Ａ）は第７の実施の形態を示す、要部斜視図、（Ｂ）は（Ａ）の線Ｂ−Ｂに沿う断面図である。
【図１１】従来例を示す、鉄筋コンクリート柱の断面内部の横断面図である。
【図１２】（Ａ），（Ｂ）は従来例を示す、鉄筋コンクリート柱の断面内部の横断面図である。
【符号の説明】
１鉄筋コンクリート柱２軸方向鉄筋
３帯鉄筋３ａ第１の帯鉄筋
３ｂ第２の帯鉄筋４中間帯鉄筋
７，４５，４６，４７，５５，５７フック部
１０，１８，２１，２５，３２，４２，４３，６０金属コネクタ（定着具）
５２，６５金属クリップ（定着具）
１１金属製リング体１２孔部
１３，１４，１６，２２，２７，３４，３８，４０係合孔
１７，２３，２８，３５係合フック２６リング体２６
２９開閉片３０枢支ピン
３３Ｕ字状の本体３６閉塞具
３９第１のリング部４１第２のリング部
４８，６２軸方向孔５０，６３本体
５１，６４軸方向開口部５６，５８係合部[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a reinforcing bar fixing method for suppressing the protrusion of a strip reinforcing bar and an axial reinforcing bar arranged inside a cross section of a reinforced concrete structure such as a reinforced concrete pier, a reinforced concrete column of a building, and a fixing tool used in the method. Is.
[0002]
[Prior art]
In the reinforced concrete structure, for example, the reinforced concrete column 1 shown in FIG. 11, the seismic design is made in consideration of plasticizing at the time of a large earthquake, and in order to increase the seismic resistance, an intermediate zone arranged inside the cross section of the column The reinforcing bars 4 are fixed by hooking semi-circular hooks or acute angle hooks 5 formed at both ends of the reinforcing bars 4 on the band reinforcing bars 3. Thereby, it has the structure which suppresses the protrusion to the outer side of the band reinforcement 3 or the axial direction reinforcement 2. However, it is very difficult in terms of construction to form semicircular hooks or acute angle hooks 5 at both ends of the intermediate rebar 4 and hook them on the rebar 3. Therefore, as shown in FIG. 12 (A), the two reinforcing bars 4a and 4b are partially overlapped inside the cross section to form the intermediate band reinforcing bar 4, or as shown in FIG. 12 (B), the opposing end is a mechanical joint 4c. Conventionally, a structure in which the intermediate band reinforcing bars 4 are connected by using the like is used.
[0003]
By the way, in the method of superimposing two reinforcing bars inside a cross section to form an intermediate band reinforcing bar, there is a problem in that the construction becomes complicated because the reinforcing bars are congested inside the cross section. Further, in the method of connecting with a mechanical joint or the like to form the intermediate strip reinforcing bar, it is necessary to prepare a separate joint or the like, which increases the cost.
[0004]
[Problems to be solved by the invention]
Accordingly, the present invention solves the conventional problems as described above, and can reliably fix the intermediate rebar to the rebar with a single rebar, and its workability is also greatly improved compared to the conventional one. It is an object of the present invention to provide a reinforcing bar fixing method and a fixing tool used in the method, which can be reduced at a relatively low cost.
[0005]
[Means for Solving the Problems]
To achieve the aforementioned object, the present invention is reinforcement fixing method according to claim 1, and longitudinal bars disposed Oite its outer periphery in the cross-sectional interior of the reinforced concrete column, such as reinforced concrete structures of reinforced concrete pier, buildings, A reinforcing bar fixing method for suppressing the sticking of the strip reinforcing bars arranged so as to cross the axial reinforcing bars in contact with the axial reinforcing bars from the outside , which is formed at one end of the fixing tool. While the joint hole is previously passed through and engaged with the intermediate band reinforcing bar arranged with the end fixed at the opposite position of the band reinforcing bar, the end of the intermediate band reinforcing bar is bent at a substantially right angle. After hooks are hooked on the rebar and placed, the intermediate rebar is fixed to the rebar by engaging the hook hole formed on the other end of the fixing tool through the hook from the tip side. To let And butterflies.
[0006]
The fixing tool according to claim 2 is used for the reinforcing bar fixing method according to claim 1, wherein an engagement hole that can be engaged with the intermediate band reinforcing bar is formed in one end portion in advance, and the other end portion is formed. In addition, an engagement hole is formed in the hook portion of the intermediate band reinforcing bar that can be engaged from the tip side. According to a third aspect of the present invention, there is provided the fixing device according to the second aspect, wherein the fixing tool comprises one ring body in which the engagement hole formed at one end and the engagement hole formed at the other end communicate with each other. It is characterized by that.
[0007]
Invention of reinforcement fixing method according to claim 4, reinforced concrete piers, and longitudinal bars disposed Oite its outer periphery to the internal cross-section of the reinforced concrete column, such as reinforced concrete structures of the building, these axial reinforcement from the outside It is a bar arrangement fixing method for suppressing the sticking of a band reinforcing bar arranged so as to be in contact with each other and intersecting with an axial reinforcing bar, and is arranged with its ends fixed at opposite positions of the band reinforcing bar. after reinforcement by hooking a hook portion which is substantially perpendicular to bending formed in an end portion of the intermediate zone rebar is in hoop, the engaging hole formed on one end portion of the fixing device through from the tip side of the hook portion And engaging the hooks formed on the other end of the fixing tool with the intermediate band reinforcing bar to fix the intermediate band reinforcing bar to the band reinforcing bar.
[0008]
The fixing tool invention described in claim 5 is used in the reinforcing bar fixing method according to claim 4, and an engagement hole is formed at one end portion to engage with the hook portion of the intermediate band reinforcing bar from the tip side. The other end is formed with an engaging hook that is hooked and engaged with the intermediate band reinforcing bar. The invention of the fixing device described in claim 6 is used for the reinforcing bar fixing method of claim 4 and is twisted so as to be inverted by 180 ° at the intermediate portion, and the tip of the hook portion of the intermediate rebar at one end portion. An engagement hole is formed to be engaged from the side, and the other end portion is provided with a spring property by the twist, and can be opened and closed, and a pair of engagement hooks are formed to be hooked and engaged with the intermediate band reinforcing bar. It is characterized by.
[0009]
The invention of the fixing device described in claim 7 is used for the reinforcing bar fixing method of claim 4, and includes a ring body, and passes through one end portion of the ring body through the hook portion of the intermediate band reinforcing bar from the front end side. An engaging hole is formed at the other end, and an engaging hook is formed at the other end to be engaged with the intermediate band reinforcing bar. An external load is applied to a part of the ring body. And an opening and closing piece that tilts inward and opens and returns to its original position and closes when no external load is applied. The invention of the fixing device described in claim 8 is used in the reinforcing bar fixing method of claim 4, comprising a U-shaped main body, and a hook portion of the intermediate band reinforcing bar at one end of the closing side of the main body. An engagement hole that engages through from the distal end side is formed, and an engagement hook that engages with the intermediate band reinforcing bar is formed at the other end, and this engagement hook closes the other end of the main body. It has the obturator which does.
[0010]
Invention of reinforcement fixing method according to claim 9, reinforced concrete piers, and longitudinal bars disposed Oite its outer periphery to the internal cross-section of the reinforced concrete column, such as reinforced concrete structures of the building, these axial reinforcement from the outside A reinforcing bar fixing method for suppressing the sticking of a reinforcing bar arranged so as to surround and intersect with an axial reinforcing bar, wherein an engagement hole formed in one end portion of the fixing tool is previously formed in the reinforcing band. through one to be engaged with the other end of the band the fixing member hook portion which is substantially perpendicular to folding formed on the end of phase intermediate band rebar disposed by fixing the ends in opposite positions rebar The intermediate rebar is fixed to the rebar by being hooked and engaged with the engagement hole formed in the part.
[0011]
The fixing tool according to claim 10 is used in the reinforcing bar fixing method according to claim 9, and includes a first ring portion having an engagement hole to be previously engaged with the band reinforcing bar, and the ring portion. A hook portion connected and bent at a substantially right angle to an end portion of the intermediate belt rebar is provided with a second ring portion having an engagement hole to be engaged from the front end side.
[0012]
Invention of reinforcement fixing method according to claim 11, reinforced concrete piers, and longitudinal bars disposed Oite its outer periphery to the internal cross-section of the reinforced concrete column, such as reinforced concrete structures of the building, these axial reinforcement from the outside It is a bar arrangement fixing method for suppressing the sticking of a band reinforcing bar arranged so as to be in contact with each other and intersecting with an axial reinforcing bar, and is arranged with its ends fixed at opposite positions of the band reinforcing bar. after depositing a fixing member at an end portion including a hook portion which is substantially perpendicular to bending formed in an end portion of the intermediate zone rebar that is, by hooking the hook portion of the intermediate band reinforcing bars deposited the fixing device to hoop It is characterized by fixing the intermediate band reinforcing bar to the band reinforcing bar by arranging the bars.
[0013]
The invention of the fixing device described in claim 12 is used for the reinforcing bar fixing method of claim 11 and has a substantially L shape when viewed from the side, and includes a hook portion of the intermediate band reinforcing bar in the entire length in the length direction of the bottom surface. It is characterized by having a recess which can be attached by covering the end from the upper surface and the side surface.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a first embodiment. FIG. 1 shows an extracted set of axial reinforcing bars, strip reinforcing bars and intermediate reinforcing bars arranged in the cross section of a reinforced concrete column as shown in FIGS. In the figure, 2 represents an axial rebar, 3 represents a rebar, 4 represents an intermediate rebar, and here, a method of fixing the intermediate rebar 4 to the rebar 3 using a metal connector 10 as a fixing tool is illustrated. Yes.
[0022]
As shown in FIG. 2, the connector 10 is composed of one flat metal ring body 11. The ring body 11 has a hole 12 having a size that allows the intermediate rebar 4 and the band rebar 3 to be inserted in the length direction. The hole is formed at an engagement hole 13 formed at one end and at the other end. The formed engagement holes 14 are formed by communicating with each other. Further, a hook portion 7 is formed at the end of the intermediate band reinforcing bar 4 by being bent at a substantially right angle. The length of the hook portion 7 is smaller than the length of the hole portion 12 of the ring body 11.
[0023]
In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 using the connector 10, the engagement hole 13 of the connector 10 is passed through the intermediate band reinforcing bar 4 from the tip side of the hook portion 7 in advance and the engagement hole 14 faces downward. (Fig. 1 left figure). Then, the hook portion 7 of the intermediate band reinforcing bar 4 with which the connector 10 is engaged is hooked on the band reinforcing bar 3 so that the tip thereof is directed downward. Thereafter, the engagement hole 14 of the connector 10 is engaged with the hook portion 7 from the tip side as indicated by an arrow (the right diagram in FIG. 1). As a result, the band reinforcing bar 3 is restrained by the intermediate band reinforcing bar 4 and the connector 10, and the intermediate band reinforcing bar 4 is fixed to the band reinforcing bar 3. Then, before placing concrete, both ends of the intermediate strip reinforcing bar 4 and the connector 10 are connected by the wire 15 or the like so that the connector 10 does not fall off. This operation is a modification described below and the second embodiment. The same applies to the embodiments after the embodiment.
[0024]
FIG. 3 shows a modification of FIGS. 1 and 2, in which a metal connector 18 having an engagement hole 16 formed at one end and an engagement hook 17 formed at the other end is used. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 using the connector 18, the hook part 7 bent at a substantially right angle to the end of the intermediate band reinforcing bar 4 is hooked on the band reinforcing bar 3 so that the tip thereof faces downward. Then, the engaging hole 16 of the connector 18 is engaged with the hook portion 7 of the intermediate band reinforcing bar 4 from the front end side, and the engaging hook 17 is hooked on the intermediate band reinforcing bar 4 and engaged. As a result, the band reinforcing bar 3 is restrained by the intermediate band reinforcing bar 4 and the connector 18, and the intermediate band reinforcing bar 4 is fixed to the band reinforcing bar 3.
[0025]
FIGS. 4A, 4B, and 4C show modifications of the metal connector used in the reinforcing bar fixing method of FIG. The connector 21 in FIG. 4A is twisted so as to be inverted 180 ° at the intermediate portion, the engagement hole 22 is formed at one end portion, and the spring property is imparted to the other end portion by the twisting so that it can be opened and closed. A pair of engagement hooks 23 are formed. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3, the engagement hole 22 of the connector 21 is engaged with the hook portion 7 of the intermediate band reinforcing bar 4 from the tip side, and the engagement hook 23 is opened to open the intermediate band reinforcing bar. 4 and then close and engage.
[0026]
The connector 25 of FIG. 4B includes a ring body 26, an engagement hole 27 is formed at one end of the ring body, and an engagement hook 28 is formed at the other end. The engagement hook 28 has an opening / closing piece 29 as a part of the ring body 26. That is, one end of the opening / closing piece 29 is pivotally supported by a pivot pin 30 and is normally biased to a closed position as shown in the figure by a tension spring (not shown). When an external load is applied, the opening / closing piece 29 is tilted to the inside of the ring body 26. When an external load is not applied, the spring returns to the original closed position. The other end face of the opening / closing piece 29 is formed on a slope, and can be engaged with the slope formed on the end face of the corresponding ring body 26. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 with this connector 25, the engagement hole 27 of the connector 25 is engaged with the hook portion 7 of the intermediate band reinforcing bar 4 from the front end side, and the engagement hook 28 is Then, the opening / closing piece 29 is pressed against the intermediate band reinforcing bar 4 to be hooked and then closed and engaged.
[0027]
4C includes a U-shaped main body 33, an engagement hole 34 is formed at one end of the main body on the closing side, and an engagement hook 35 is formed at the other end. The engagement hook 35 has an obturator 36 that closes the other end of the main body 33. The obturator 36 includes a bolt 36a inserted through a mounting hole (not shown) provided at the other end of the main body 33, and a nut 36b screwed into the bolt. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 by this connector 32, the engagement hole 34 of the connector 32 is engaged with the hook portion 7 of the intermediate band reinforcing bar 4 from the front end side, and the closing tool 36 is fixed to the hook. The other end on the open side of the main body 33 before mounting is passed through the intermediate strip reinforcing bar 4, and then the bolt 36a is inserted into the mounting hole, and the nut 36b is screwed and tightened. As a result, the obturator 36 forms the engagement hook 35, and the hook is hooked on the intermediate band reinforcing bar 4 to be engaged therewith.
[0028]
FIG. 5 shows a second embodiment. In this embodiment, a metal connector 42 having a first ring portion 39 having an engagement hole 38 and a second ring portion 41 connected to the ring portion and having an engagement hole 40 is used. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 using the connector 42, the engagement hole 38 of the connector 42 is passed through the band reinforcing bar 3 in advance and engaged. Then, the hook portion 7 of the intermediate band reinforcing bar 4 is hooked and engaged with the engagement hole 40 of the connector 42 so that the tip thereof is directed downward. Thereby, the intermediate rebar 4 is fixed to the rebar 3.
[0029]
FIG. 6 shows a third embodiment. In this embodiment, a metal connector 43 that is substantially L-shaped and has a substantially U-shaped cross section when viewed from the side surface that is attached to the end of the intermediate band reinforcing bar 4 including a part of the hook portion 7 is used. The connector 43 has a recess 44 that can be attached by covering the intermediate band reinforcing bar 4 from the upper surface and the side surface, and is attached so that the intermediate band reinforcing bar 4 fits in the recess. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 using the connector 43, the connector 43 is attached to the end of the intermediate band reinforcing bar 4 as shown. Then, the hook portion 7 of the intermediate rebar 4 to which the connector 43 is attached is hooked on the rebar 3 and arranged. As a result, the band reinforcing bar 3 is restrained by the intermediate band reinforcing bar 4 and the connector 43, and the intermediate band reinforcing bar 4 is fixed to the band reinforcing bar 3.
[0030]
FIG. 7 shows a fourth embodiment. In this embodiment, the connector 10 shown in the first embodiment is used. In order to fix the band rebar 3 to the axial rebar 2 using this connector 10, the engagement hole 13 of the connector 10 is engaged with the band rebar 3 in advance. Then, after hook portions 45 bent at substantially right angles to the end portions of the band rebar 3 are hooked on the axial rebar 2 and arranged, the engagement holes 14 formed on the other end portion of the connector 10 are connected to the end portions of the band rebar 3. The hook portion 45 is engaged from the tip side. Thereby, the axial rebar 2 is restrained by the band rebar 3 and the connector 10, and the band rebar 3 is fixed to the axial rebar 2.
[0031]
FIG. 8 shows a fifth embodiment. In this embodiment, a hook portion 46 bent at a substantially right angle is formed at the end of the intermediate strip reinforcing bar 4 and a hook portion 47 similarly bent at a substantially right angle at the tip thereof is bent into a substantially U shape. The main body 50 is formed with an axial hole 48 having a size capable of clipping the hook portion 46 and the band rebar 3, and the hook portion 46 or the band rebar 3 is formed in the main body 50. A metal clip 52 is used in which an axial opening 51 for passing through is cut out. In order to fix the intermediate band reinforcing bar 4 to the band reinforcing bar 3 using the clip 52, after arranging the hook part 46 of the intermediate band reinforcing bar 4 so as to follow the band reinforcing bar 3, the hook part and the band reinforcing bar are arranged. 3 is passed through the axial hole 48 of the main body 50 and clipped as shown in FIG. This clip is performed by pressing the hook portion 46 and the band rebar 3 with frictional force, but may be performed by other methods. As a result, the rebar 3 is restrained by the intermediate rebar 4 and the clip 52, and the intermediate rebar 4 is fixed to the rebar 3.
[0032]
FIG. 9 shows a sixth embodiment. In this embodiment, the whole is made of a wire, and an engaging portion 56 is formed at one end portion for engaging the hook portion 55 of the first band reinforcing bar 3a and the contact portion of the second band reinforcing bar 3b, and the other end portion. A metal connector 60 is used in which an engagement portion 58 is formed to engage the hook portion 57 of the second band reinforcing bar 3b and the contact portion of the first band reinforcing bar 3a. In order to fix the band rebars 3a and 3b to the axial rebar 2 using the connector 60, the hook portion 55 of the first band rebar 3a is hooked on the axial rebar 2 and arranged, and the second band rebar 3b. The hook portion 57 of the first band reinforcing bar 3a is brought into contact with the axial reinforcing bar 2 from the opposite side to the hook portion 55 of the first band reinforcing bar 3a and hooked and arranged, and then the hook portion 55 of the first band reinforcing bar 3a. And the second band reinforcing bar 3b and the hook portion 57 of the second band reinforcing bar 3b and the first band reinforcing bar 3a are engaged by engaging portions 56 and 58 formed at one end and the other end of the connector 60. As a result, the first rebar 3 a and the second rebar 3 b are fixed to the axial rebar 2.
[0033]
FIG. 10 shows a seventh embodiment. In this embodiment, the hook portion 55 of the first rebar 3a and the second rebar 3b or the hook portion 57 of the second rebar 3b and the first rebar 3a can be clipped. A main body 63 having an axial hole 62 is provided, and the main body uses a metal clip 65 in which an axial opening 64 for passing a hook portion or a reinforcing bar through the axial hole 62 is cut out. In order to fix the band rebars 3a and 3b to the axial rebar 2 using the clip 65, the hook portion 55 of the first band rebar 3a is hooked on the axial rebar 2 and arranged, and the second band rebar 3b. The hook portion 57 of the first band reinforcing bar 3a is brought into contact with the axial reinforcing bar 2 from the opposite side to the hook portion 55 of the first band reinforcing bar 3a and hooked and arranged, and then the hook portion 55 of the first band reinforcing bar 3a. And the second rebar 3b are clipped with the clip 65 as shown in FIG. This clip is also performed by pressing the hook portion 55 and the band rebar 3b by frictional force, but may be performed by other methods. As a result, the first rebar 3 a and the second rebar 3 b are fixed to the axial rebar 2. In this case, the clip 65 may be clipped by the hook portion 57 of the second rebar 3b and the first rebar 3a, or both may be clipped.
[0034]
In each of the above-described embodiments, the metal connectors 10, 18, 21, 25, 32, 42, 43, 60 or the metal clips 52, 65 are described as fixing devices. However, this is only a preferable example. It is not limited to such metal connectors or metal clips. Further, the material is not necessarily metal (steel material), and other materials such as FRP and fiber material may be used. In addition, it is needless to say that the specific shape and structure of the metal connector or the metal clip shown in the embodiment may be variously changed or modified in practice. In each of the above embodiments, a reinforced concrete column has been described as an example. However, the present invention can also be applied to various reinforced concrete structures.
【The invention's effect】
The present invention is as described above, and according to the reinforcing bar fixing method according to claims 1, 4, 9, and 11, the fixing of the intermediate reinforcing bar to the reinforcing bar is very easy and reliable with one reinforcing bar. It can be performed and the workability can be remarkably improved as compared with the conventional one. Therefore, even if the cover concrete of a reinforced concrete column is peeled off due to a large plastic deformation during a large earthquake, the core concrete is restrained by the intermediate band reinforcing bar fixed to the band reinforcing bar. Dashi can be suppressed, damage can be minimized, and it has excellent earthquake resistance. Further, since no mechanical joint or the like is used as in the prior art, the cost can be kept relatively low. Furthermore, according to the fixing tool described in the second, third, fifth, sixth, seventh, eighth, tenth and twelfth aspects, it is possible to play the role of improving the workability in carrying out the bar arrangement fixing method. There is an excellent effect.
[Brief description of the drawings]
FIG. 1 is a perspective view of an essential part showing a first embodiment of the present invention.
FIG. 2 is a front view of the same fixing bracket.
FIG. 3 is a perspective view of an essential part showing a modified example of the same.
FIG. 4 is a front view showing various modified examples of the fixing bracket used in the modified example.
FIG. 5 is a perspective view of a main part showing a second embodiment.
6A is a perspective view of a main part of a third embodiment, and FIG. 6B is a cross-sectional view taken along line BB in FIG.
FIG. 7 is a main part perspective view showing a fourth embodiment;
FIG. 8A is a perspective view of an essential part showing a fifth embodiment, and FIG. 8B is a sectional view taken along line BB in FIG. 8A.
FIG. 9 is a main part perspective view showing a sixth embodiment;
FIG. 10A is a perspective view of a main part of a seventh embodiment, and FIG. 10B is a sectional view taken along line BB in FIG.
FIG. 11 is a cross-sectional view inside a cross section of a reinforced concrete column, showing a conventional example.
FIGS. 12A and 12B are cross-sectional views inside a cross section of a reinforced concrete column, showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reinforced concrete pillar 2 Axial rebar 3 Band rebar 3a 1st band rebar 3b 2nd band rebar 4 Intermediate band rebar 7,45,46,47,55,57 Hook part 10,18,21,25,32,42 , 43, 60 Metal connector (fixing tool)
52,65 Metal clip (fixing tool)
DESCRIPTION OF SYMBOLS 11 Metal ring body 12 Hole part 13,14,16,22,27,34,38,40 Engagement hole 17,23,28,35 Engagement hook 26 Ring body 26
DESCRIPTION OF SYMBOLS 29 Opening-closing piece 30 Pivoting pin 33 U-shaped main body 36 Closure tool 39 1st ring part 41 2nd ring part 48,62 Axial hole 50,63 Main body 51,64 Axial opening part 56,58 Engagement Part

Claims

It reinforced concrete pier, and longitudinal bars disposed Oite its outer periphery in the cross-sectional interior of the reinforced concrete column, such as reinforced concrete structures of the building, arranged in a direction intersecting the longitudinal bars in contact so as to surround the axial reinforcement from the outside The reinforcing bar fixing method for suppressing the sticking of the reinforcing bar is arranged, and the engaging hole formed in the one end part of the fixing tool is arranged with the end part fixed at the opposite position of the band reinforcing bar. While passing through the intermediate rebar in advance and engaging with it, hook part formed at a substantially right angle at the end of the intermediate rebar is hooked on the rebar and placed, and then attached to the other end of the fixing tool. A reinforcing bar fixing method comprising fixing an intermediate bar reinforcing bar to a band reinforcing bar by engaging the formed engaging hole with the hook part from the tip side thereof.

It is used for the reinforcing bar fixing method according to claim 1, wherein an engagement hole that can be engaged with the intermediate band rebar in advance is formed in one end portion, and the hook portion of the intermediate band rebar is formed in the other end portion from the front end side. An anchoring hole that can be engaged therethrough is formed.

The fixing device according to claim 2, wherein the engagement hole formed at one end and the engagement hole formed at the other end are formed of one ring body.

It reinforced concrete pier, and longitudinal bars disposed Oite its outer periphery in the cross-sectional interior of the reinforced concrete column, such as reinforced concrete structures of the building, arranged in a direction intersecting the longitudinal bars in contact so as to surround the axial reinforcement from the outside A reinforcing bar fixing method for suppressing the sticking of the reinforcing bar, which is formed by bending the end part of the intermediate reinforcing bar disposed substantially opposite to the opposite position of the reinforcing bar After hooking the hook part on the rebar and arranging it, an engagement hole formed in one end part of the fixing tool is engaged through the hook part from its tip side and formed in the other end part of the fixing tool. A reinforcing bar fixing method comprising fixing the intermediate band reinforcing bar to the band reinforcing bar by hooking and engaging the engaged hook with the intermediate band reinforcing bar.

5. The reinforcing bar fixing method according to claim 4, wherein an engagement hole is formed at one end to engage with the hook portion of the intermediate band reinforcing bar from the tip side, and is hooked on the intermediate band reinforcing bar at the other end portion. The fixing tool is characterized in that an engaging hook is formed.

5. Used in the reinforcing bar fixing method according to claim 4, wherein an intermediate hole is twisted so as to be inverted by 180 °, and an engagement hole is formed at one end portion to engage with the hook portion of the intermediate band rebar from the tip side. The fixing device is characterized in that a spring property is imparted to the other end portion by being twisted so that the other end portion can be opened and closed, and a pair of engaging hooks are formed to be hooked and engaged with the intermediate band reinforcing bar.

An engagement hole for use in the reinforcing bar fixing method according to claim 4, comprising a ring body, and having an engagement hole that engages with a hook portion of an intermediate band rebar from one end side of the ring body. An engagement hook is formed at the end portion to be hooked and engaged with the intermediate band reinforcing bar, and this engagement hook is tilted inward when an external load is applied to a part of the ring body, so that no external load is applied. And a fixing device having an opening and closing piece that returns to its original position and closes.

An engagement hole for use in the reinforcing bar fixing method according to claim 4, comprising an U-shaped main body, and having an engagement hole that engages with a hook portion of the intermediate band reinforcing bar from one end of the main body on the closing side. An anchoring hook that is formed and is engaged with the other end portion by being hooked on the intermediate band reinforcing bar, and the engaging hook has an obturator that closes the other end of the main body. .

It reinforced concrete pier, and longitudinal bars disposed Oite its outer periphery in the cross-sectional interior of the reinforced concrete column, such as reinforced concrete structures of the building, arranged in a direction intersecting the longitudinal bars in contact so as to surround the axial reinforcement from the outside A reinforcing bar fixing method for suppressing the sticking of the reinforcing bars , wherein an engagement hole formed on one end of the fixing tool is previously engaged with the reinforcing bars while the relative positions of the reinforcing bars are A hook portion that is bent at a substantially right angle to an end portion of an intermediate strip reinforcing bar that is arranged with the end portion fixed at a facing position is hooked into an engagement hole formed at the other end portion of the fixing tool and engaged. A reinforcing bar fixing method characterized by fixing an intermediate band reinforcing bar to a band reinforcing bar.

10. The reinforcing bar fixing method according to claim 9, wherein the first ring part having an engagement hole that is pre-engaged with the rebar and the ring part is connected to the end of the intermediate rebar. A fixing device comprising a hook portion bent at a right angle and a second ring portion having an engagement hole to be engaged from the tip side.

It reinforced concrete pier, and longitudinal bars disposed Oite its outer periphery in the cross-sectional interior of the reinforced concrete column, such as reinforced concrete structures of the building, arranged in a direction intersecting the longitudinal bars in contact so as to surround the axial reinforcement from the outside A reinforcing bar fixing method for suppressing the sticking of the reinforcing bar, which is formed by bending the end part of the intermediate reinforcing bar disposed substantially opposite to the opposite position of the reinforcing bar After attaching the fixing tool to the end portion including the hook portion, the intermediate band reinforcing bar is fixed to the band reinforcing bar by hooking the hook part of the intermediate band reinforcing member to which the fixing tool is attached to the band reinforcing bar. The bar arrangement fixing method characterized by the above-mentioned.

It is used for the reinforcing bar fixing method according to claim 11 and is substantially L-shaped when viewed from the side surface, and can be attached by covering the end including the hook portion of the intermediate band reinforcing bar from the upper surface and the side surface along the entire length of the bottom surface. Fixing tool characterized by having a concave recess.