JP4003959B2

JP4003959B2 - Load-bearing wall construction method for non-bearing walls and structure of load-bearing walls

Info

Publication number: JP4003959B2
Application number: JP2003117888A
Authority: JP
Inventors: 博上谷; 幸伸小出; 和夫中原; 祐史上田; 哲雄平松; 寿弘堀江
Original assignee: Sekisui House Ltd
Current assignee: Sekisui House Ltd
Priority date: 2003-04-23
Filing date: 2003-04-23
Publication date: 2007-11-07
Anticipated expiration: 2023-04-23
Also published as: JP2004324134A

Description

【０００１】
【発明の属する技術分野】
本発明は、住宅等の増改築工事に際し、既存建築部における非耐力壁を構造的に補強して耐力壁とするための工法に関するものである。
【０００２】
【従来の技術】
住宅等の増改築工事においては、住宅の構造が変化することにより、既存建築部において用いられていた非耐力壁が、上部に荷重を受けることとなる場合があり、この場合、該非耐力壁を耐力壁とする必要がある。図１４は、非耐力壁の一例を示す図であり、非耐力壁８０の軸組８１から外壁パネル８２を取り外し、軸組８１を戸外側に露呈させた状態を示している。図に示すように、枠形状の軸組８１は、互いに平行する左右１対の軸柱８３と、該軸柱８３に直交する上下１対の軸桟８４と、軸柱８３の長手方向中央部に軸桟８４と平行して設けられた中桟８５と、軸桟８４の長手方向中央部に軸柱８３と平行して設けられた中柱８６とを具備してなるものである。このような非耐力壁８１を耐力壁化する手段としては、外壁部から非耐力壁８０をその軸組８１ごと取り外して、図示しない既成の耐力壁の軸組に入れ替える方法がある。
【０００３】
また、非耐力壁を耐力壁化する別の手段としては、非耐力壁の軸組を取り外さずに、軸組が形成する隅部を互いに接続する耐力ブレースを追加することにより耐力壁とする方法もある。この場合、耐力ブレースの両端を溶接にて前記隅部に接合したり、あるいは、前記隅部にブレース取付金具をボルト締めで取り付け、該ブレース取付金具に耐力ブレースの両端をボルト締めで固定することにより、耐力ブレースを追加する（特許文献１参照）。
【０００４】
【特許文献１】
特開２００３−６４８０７号公報
【０００５】
【発明が解決しようとする課題】
しかし、外壁部から非耐力壁８０を軸組８１ごと取り外して、既成の耐力壁の軸組に入れ替える方法では、非耐力壁８０の軸組８１を取り外したり、耐力壁の軸組を組み込んだりする作業に多大な時間と労力を要するという問題がある。また、非耐力壁８０の軸組８１を取り外す作業を行う際に、図示しない内壁枠を壊してしまったり、内壁材に貼設されたクロスにしわが生じたり等によって、内装をやり直さなければならない場合が生じるという問題がある。
【０００６】
また、軸組８１ごと取り外された非耐力壁８０が産業廃棄物として大量に発生し、これを運搬、処理するために多くの費用がかかるという問題もある。
【０００７】
また、非耐力壁の軸組に耐力ブレースを追加して耐力壁とする方法では、例えば、軸組の内側に中桟がある場合には、該補強中桟に干渉しないように、且つ、補強中桟を切断することなく耐力ブレースを追加するために、耐力ブレースを上下２段に分けて配設する必要がある。更に、耐力ブレースの両端を溶接にて軸組の隅部に追加する方法では、溶接の有資格者でないと作業が行えないという問題があり、さらに、有資格者であっても、現場溶接は信頼性が低く施工の確実性に問題がある。
【０００８】
また、軸組に耐力ブレースを追加するためにブレース取付金具を用いる方法では、ブレース取付金具を前記隅部にボルト締めで取り付ける作業を行うためには、ブレース取付金具の形状から、軸組の室内側からしか作業をすることができない。そのため、前記内壁パネルを取り外して作業を行う必要があるために、前述と同様に、内壁パネルに貼設されたクロスにしわが生じる等して、内装をやり直さなければならない場合が生じるという問題がある。
【０００９】
本発明は、このような問題に鑑みてなされたものであり、住宅等の増築工事に際し、既存建築部の非耐力壁を、軸組ごと取り外すことなく、十分な強度を有する耐力壁とすることにより、省力化及び産業廃棄物の削減を可能とする手段を提供することを目的とする。
【００１０】
【課題を解決するための手段】
本発明は、住宅等の増改築工事に際し、既存建築部における非耐力壁を形成する枠形状に配設された軸柱及び軸桟と、前記軸柱の長手方向中央部に前記軸桟と略平行して設けられた中桟と、前記軸桟の長手方向中央部に前記軸柱と略平行して設けられた中柱とを具備してなる軸組に、耐力ブレースを組み込んで耐力壁とする非耐力壁の耐力壁化工法であって、前記中柱の長手方向中間部を切除して上部中柱と下部中柱に分断するとともに、前記中桟の両端部を前記軸柱から切除する切除工程と、長手方向中央を挟んで略対称な位置に左右一対の切欠部がそれぞれ形成された２本の補強中桟を、その両端部を前記軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に設ける補強中桟取付工程と、長手方向中央部に切欠部が形成された補強中柱を、前記軸柱と略平行となるようにその両端部を上下の前記補強中桟の長手方向中央部にそれぞれ取り付ける補強中柱取付工程と、一対の前記耐力ブレースを、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部を、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定する耐力ブレース取付工程と、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材を、前記耐力ブレースを避けながらそれぞれ取り付ける補強部材取付工程とを含むものである。
【００１１】
また、本発明は、住宅等の増改築工事に際し、既存建築部における非耐力壁を形成する枠形状に配設された軸柱及び軸桟と、前記軸柱の長手方向中央部に前記軸桟と略平行して設けられた中桟と、前記軸桟の長手方向中央部に前記軸柱と略平行して設けられた中柱とを具備してなる軸組に、耐力ブレースを組み込んで耐力壁とする非耐力壁の耐力壁化工法であって、前記中柱の長手方向中間部を切除して上部中柱と下部中柱に分断するとともに、前記中桟の両端部を前記軸柱から切除する切除工程と、前記軸柱に沿って、該軸柱を補強するための補強軸柱を取り付ける補強軸柱取付工程と、長手方向中央を挟んで略対称な位置に左右一対の切欠部がそれぞれ形成された２本の補強中桟を、その両端部を前記補強軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に設ける補強中桟取付工程と、長手方向中央部に切欠部が形成された補強中柱を、前記軸柱と略平行となるようにその両端部を上下の前記補強中桟の長手方向中央部にそれぞれ取り付ける補強中柱取付工程と、一対の前記耐力ブレースを、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部を、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定する耐力ブレース取付工程と、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材を、前記耐力ブレースを避けながらそれぞれ取り付ける補強部材取付工程とを含むものである。
【００１２】
また、本発明は、枠形状に配設された軸柱及び軸桟の内側に、該軸桟の長手方向中央部に前記軸柱と略平行して配設された中柱が、その長手方向中間部が切除されることにより上部中柱及び下部中柱に分断され、長手方向中央を挟んで略対称な位置に左右一対の切欠部が形成された補強中桟が、その両端部を前記軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に配設され、長手方向中央部に切欠部が形成された補強中柱が、その両端部を上下の前記補強中桟の長手方向中央部に取り付けることにより、前記軸柱と略平行して配設され、一対の耐力ブレースが、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部が、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定され、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材が、前記耐力ブレースを避けてそれぞれ配設されたものである。
【００１３】
また、本発明は、枠形状に配設された軸柱及び軸桟の内側に、該軸桟の長手方向中央部に前記軸柱と略平行して配設された中柱が、その長手方向中間部が切除されることにより上部中柱及び下部中柱に分断され、前記軸柱を補強するための補強軸柱が前記軸柱に沿って配設され、長手方向中央を挟んで略対称な位置に左右一対の切欠部が形成された補強中桟が、その両端部を前記補強軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に配設され、長手方向中央部に切欠部が形成された補強中柱が、その両端部を上下の前記補強中桟の長手方向中央部に取り付けることにより、前記軸柱と略平行して配設され、一対の耐力ブレースが、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部が、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定され、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材が、前記耐力ブレースを避けてそれぞれ配設されたものである。
【００１４】
【発明の実施の形態】
以下、本発明の第１の実施形態に係る非耐力壁の耐力壁化工法について図面に基づいて説明する。本実施形態に係る非耐力壁の耐力壁化工法は、図１４に示す非耐力壁８０に対して施工されるものである。図１は、本実施形態に係る耐力壁１００の軸組１０１を示す概略正面図であり、非耐力壁１００の軸組１０１から外壁パネル８２を取り外し、軸組１０１を戸外側に露呈させた状態を示している。なお、図１において、非耐力壁８０と同一の構成については同一の符号を付している。図に示すように、耐力壁１００は、互いに平行する左右１対の前記軸柱８３と、該軸柱８３と直交する上下１対の前記軸桟８４と、前記中柱８６の長手方向中間部が切除されることにより分断された上部中柱１０２及び下部中柱１０３と、軸桟８４と平行して設けられた補強中桟１０４と、該補強中桟１０４を補強する中桟補強部材１０５と、軸柱８３と平行して設けられた補強中柱１０６と、該補強中柱１０６を補強する中柱補強部材１０７とを具備してなる軸組１０１に、耐力ブレース１０８が組み込まれたものである。以下、各構成要素について更に詳細に説明する。
【００１５】
左右１対の前記軸柱８３は、図に詳細は示さないが、断面が略コの字型の所謂Ｃ型鋼がその開口部を内側に向けて配設されたものであり、隣接する耐力壁１００の軸柱８３同志が背中合わせでボルト締めで締結されている。また、該軸柱８３と直交して設けられた上下１対の前記軸桟８４は、軸柱８３と同様に所謂Ｃ型鋼がその開口部を内側に向けて配設されたものであり、その両端は軸柱８３の端部に溶接によりそれぞれ固定されている。
【００１６】
前記上部中柱１０２、及び前記下部中柱１０３は、図１４に示す軸組８１において、中柱８６の長手方向中間部を切除することにより分断されて残存したものである。該上部中柱１０２及び下部中柱１０３は、図に詳細は示さないが、２本のコ型鋼をその開口部が互いに外側を向くように溶接で固定したものである。
【００１７】
図２は、前記補強中桟１０４の構成を示す概略斜視図である。図に示すように、補強中桟１０４は、ボルト穴１０９が設けられた底部１１０と、該底部１１０に直交する第１曲折部１１１及び第２曲折部１１２からなる、縦断面が略コの字型の部材であって、その長手方向中央を挟んで略対称な位置に左右一対の切欠部１１３が、第１曲折部１１１から底部１１０に渡ってそれぞれ形成されている。これにより、耐力ブレース１０８を配設する際には、該切欠部１１３を通過させることで、耐力ブレース１０８と補強中桟１０４とが干渉しないものとなっている。補強中桟１０４において切欠部１１３を形成する位置、及びその形状は、本実施形態に限られず、耐力ブレース１０８との干渉が生じる位置、及び耐力ブレース１０８の傾斜角等に応じて適宜設計変更が可能であるが、補強中桟１０４の強度低下を最小限に押える大きさとするのが好適である。
【００１８】
また、図２に示すように、補強中桟１０４の長手方向両端部には、取付片１１４がそれぞれ配設されている。該取付片１１４は、図１に示すように、補強中桟１０４の両端部を軸柱８３に取り付けるためのものであって、互いに直交する第１切片１１４ａ及び第２切片１１４ｂからなるＬ字型の部材である。該取付片１１４は、第１切片１１４ａが補強中桟１０４の底部１１０に溶接等で接合されることにより取り付けられている。また、第１切片１１４ａと第２切片１１４ｂとで形成される角部には補強部材１０４ｃが設けられ、取付片１１４が補強されている。
【００１９】
前記中桟補強部材１０５は、前記補強中桟１０４の切欠部１１３を塞ぐように取り付けられ、切欠部１１３を形成したことによる補強中桟１０４の強度低下を補強するためのものである。図３は、中桟補強部材１０５の構成を示す概略斜視図であり、図に示すように、中桟補強部材１０５は、ボルト穴１１５が設けられた底部１１６と、該底部１１６と直交する曲折部１１７からなるＬ字型の部材であって、底部１１６の長手方向中間部には切欠部１１８が形成されており、耐力ブレース１０８を配設する際に該切欠部１１８を通過させることにより、耐力ブレース１０８と中桟補強部材１０５とが干渉しないものとなっている。また、該中桟補強部材１０５の幅寸法Ｗ２及び高さ寸法Ｈ２は、前記補強中桟１０４の幅寸法Ｗ１及び高さ寸法Ｈ１よりも若干小さく形成され、中桟補強部材１０５を補強中桟１０４の内周面に当接させて配設することが可能となっている。一方、中桟補強部材１０５の長手寸法Ｌ２は特に限定されるものではないが、補強中桟１０４の切欠部１１３近傍に配設した時に、その端部が前記取付片１１４に干渉しない範囲とする必要がある。
【００２０】
図４は、前記補強中柱１０６の構成を示す概略斜視図である。図に示すように、補強中柱１０６は、縦断面が略コの字型である２本のコの字型部材１１９がプレート１２０を介して互いに接合されたものであり、各コの字型部材１１９は、ボルト穴１２１が設けられた底部１２２と、該底部１２２に直交する第１曲折部１２３、及び第２曲折部１２４とを具備してなるものである。また、２本のコの字型部材１１９の長手方向中央部には切欠部１２５が、第１曲折部１２３から底部１２２に渡って形成されており、耐力ブレース１０８を配設する際に該切欠部１２５を通過させることにより、耐力ブレース１０８と補強中柱１０６とが干渉しないものとなっている。切欠部１２５を形成する位置、及びその形状は、本実施形態に限られず、耐力ブレース１０８との干渉が生じる位置、及び耐力ブレース１０８の傾斜角等に応じて適宜設計変更が可能であるが、補強中柱１０６の強度低下を最小限に押える大きさとするのが好適である。
【００２１】
また、図４に示すように、補強中柱１０６を構成する２本のコの字型部材１１９の長手方向両端部には、取付片１２６がそれぞれ配設されている。該取付片１２６は、図１に示すように、補強中柱１０６の両端部を補強中桟１０４にそれぞれ取り付けるためのものであって、互いに直交する第１切片１２６ａ、及び第２切片１２６ｂからなるＬ字型の部材である。該取付片１２６は、第１切片１２６ａが補強中柱１０６の底部１２２に溶接等で接合されることにより取り付けられている。また、第１切片１２６ａと第２切片１２６ｂとで形成される角部には、補強部材１２６ｃが設けられ、取付片１２６が補強されている。
【００２２】
前記中柱補強部材１０７は、前記補強中柱１０６の切欠部１２５を塞ぐようにして取り付けられ、切欠部１２５を形成したことによる補強中柱１０６の強度低下を補強するためのものである。図５は、中柱補強部材１０７の構成を示す概略斜視図であり、図に示すように、中柱補強部材１０７は、底部１２７と、該底部１２７と略直交し、ボルト穴１２８が設けられた曲折部１２９と、底部１２７の裏側面に接合された補強板１３０とからなるＬ字型の部材である。該中柱補強部材１０７の幅寸法Ｗ４及び高さ寸法Ｈ４は、補強中柱１０６を構成するコの字型部材１１９の幅寸法Ｗ３及び高さ寸法Ｈ３より若干小さく形成され、中柱補強部材１０７を補強中柱１０６の内周面に当接させて配設することが可能となっている。また、曲折部１２９の長手方向中央部は幅方向に渡って切除されており、耐力ブレース１０８を配設する際に該切欠部１３１を通過させることにより、耐力ブレース１０８と中柱補強部材１０７とが干渉しないものとなっている。
【００２３】
前記耐力ブレース１０８は、前記軸柱８３と前記軸桟８４とで形成され相対角位置にある隅部同志を連結することにより軸組１０１を補強するものである。図１に示すように、耐力ブレース１０８は、細丸棒などからなる２本のブレース本体１０８ａと、該２本のブレース本体１０８ａを互いに連結し、耐力ブレース１０８の張りを調節するためのターンバックル１０８ｂと、２本のブレース本体１０８ａの相対向する端部に溶接等で固着され、耐力ブレース１０８を軸組１０１の隅部に取り付けるためのブレース取付金具１０８ｃとを備えてなるものである。該耐力ブレース１０８の取り付けに際しては、まず、ブレース取付金具１０８ｃを前記隅部に図示しないボルト等の固定具でそれぞれ固定し、その後に、ターンバックル１０８ｂを廻すことによりその張りを調節する。
【００２４】
図６は、前記ブレース取付金具１０８ｃの構成を示す概略斜視図である。図に示すように、ブレース取付金具１０８ｃは、軸柱接合部１３２と軸桟接合部１３３とを有するＬ字型部材１３４に、切欠部１３５が形成された前面板１３６、後面板１３７、及び補強板１３８が固着されてなるものであり、前面板１３６が戸外側に向くようにして軸組１０１の隅部に取り付けられる。該ブレース取付金具１０８ｃの取り付けに際しては、前記隅部において、軸柱接合部１３２及び軸桟接合部１３３を、軸柱８３及び軸桟８４にそれぞれ当接させ、軸柱接合部１３２に設けられたボルト穴１３９、及び軸桟接合部１３３に設けられたボルト穴１４０において、図示しないボルト等の固定具でそれぞれ固定する。この時、作業者は、前面板１３６に形成された切欠部１３５からブレース取付金具１０８ｃの内部へと手を差し入れて固定作業を行うことができる。これにより、ブレース取付金具１０８ｃの取り付け作業を、軸組１０１の戸外側のみから行うことが可能となり、軸組１０１の室内側に設けられた図示しない内壁パネルを取り外す作業が不要となるために、該作業に伴って生じる内装のやり直しの手間を削減することができる。
【００２５】
以下、本発明の第２の実施形態に係る非耐力壁の耐力壁化工法について図面に基づいて説明する。本実施形態に係る非耐力壁の耐力壁化工法は、図１４に示す非耐力壁８０に対して施工されるものであって、特に、軸柱８３が所定の厚み以下の鋼材からなり、座屈耐力が十分でない場合に施工されるものである。図７は、本実施形態に係る耐力壁２００の軸組２０１を示す概略正面図であり、非耐力壁２００の軸組２０１から外壁パネル８２を取り外し、軸組２０１を戸外側に露呈させた状態を示している。図に示すように、本実施形態に係る軸組２０１は、軸柱８３の長手方向に沿って軸柱８３を補強するための補強軸柱２０２が設けられた点を除いては、第１の実施形態に係る耐力壁１００の軸組１０１と同様の構成であり、図において、軸組１０１と同一の部材については同一の符号を付し、ここでは詳細な説明は省略する。
【００２６】
前記補強軸柱２０２は、軸柱８３に沿って取り付けられることにより軸柱８３を補強し、軸柱８３が所定の厚み以下の鋼材からなる場合に座屈しやすくなることを防止するためのものである。図８は、補強軸柱２０２を示す概略斜視図であり、図に示すように、補強軸柱２０２は、ボルト穴２０３が設けられた底部２０４と、該底部２０４と直交する第１曲折部２０５、及び第２曲折部２０６とを有してなる、縦断面が略ハット型の部材である。該補強軸柱２０２の底部２０４の幅寸法Ｗ５は、Ｃ型鋼である軸柱８３の開口部の幅よりも小さく形成され、補強軸柱２０２を軸柱８３内部に取り付けができるものとなっている。
【００２７】
以下、本実施形態に係る非耐力壁の耐力壁化工法の施工手順について説明する。本実施形態に係る非耐力壁の耐力壁化工法は、切除工程と、補強軸柱取付工程と、補強中桟取付工程と、補強中柱取付工程と、耐力ブレース取付工程と、補強部材取付工程とを含んでなるものである。以下、各工程について更に詳細に説明する。
【００２８】
前記既存軸組切除工程では、まず、図１４に示す非耐力壁８０の軸組８１において、中柱８６の長手方向中間部を切除することにより上部中柱１０２及び下部中柱１０３に分断し、更に、中桟８５を、その両端部における軸柱８３との接続部分において切除する。なお、中柱８６及び中桟８５の切断に用いる工具としては、例えばメタルカッター（不図示）を用いることが可能である。
【００２９】
前記補強軸柱取付工程では、前記補強軸柱２０２を、軸柱８３の長手方向に沿わせるようにして取り付ける。図９は、補強軸柱２０２を軸柱８３に取り付けた状態を示す図であり、図７におけるＡ−Ａ断面を示している。図に示すように、補強軸柱２０２の底部２０４を軸柱８３内部のウエブ面８３ａに当接させた上で、底部２０４に設けられた前記ボルト穴２０３においてボルト２０７により固定する。なお、第１の実施形態の場合、すなわち補強軸柱２０２がない構成の場合には、本工程を省略して次の補強中桟取付工程へと進む。
【００３０】
前記補強中桟取付工程では、図７に示すように、前記補強中桟１０４の両端部を前記補強軸柱２０２の長手方向中央部に取り付ける。図１０は、図７における位置Ｘを拡大した図であるが、図に示すように、Ｌ字型のプレートＰの一端部を下部中柱１０３のウエブ面１０３ａに当接させてボルト締めで固定するとともに、他端部を補強中桟１０４の底部１１０に当接させてボルト締めで固定する。一方、図１１は、図７における位置Ｙを拡大した図であるが、図に示すように、補強中桟１０４の両端部に設けられた取付片１１４の第２切片１１４ｂを、補強軸柱２０２の底部２０４に当接させてボルト締めで固定する。また、図に詳細は示さないが、第１の実施形態の場合には、前記取付片１１４の第２切片１１４ｂを、軸柱８３のウエブ面８３ａに当接させて固定すればよい。
【００３１】
前記補強中柱取付工程では、前記補強中柱１０６の両端部を補強中桟１０４にそれぞれ接続する。より詳細に説明するに、図１０に示すように、補強中柱１０６の一端部に設けられた取付片１２６の第２切片１２６ｂを、下部中柱１０３に接続された補強中桟１０４の底部１１０にそれぞれ当接させ、ボルト締めで固定する。一方、補強中柱１０６の他端部に設けられた取付片１２６の第２切片１２６ｂも、図に詳細は示さないが、同様にして上部中柱１０２に接続された補強中桟１０４の底部１１０にそれぞれ固定する。
【００３２】
前記耐力ブレース取付工程では、軸組２０１の隅部同志を前記耐力ブレース１０８で接続する。より詳細に説明するに、図７に示すように、耐力ブレース１０８の一方のブレース取付金具１０８ｃを、軸柱８３と軸桟８４によって形成される隅部に配置し、ボルト等の固定具で固定する。更に、他方のブレース取付金具１０８ｃをその対角位置にある隅部に配置してボルト締めで固定する。この時、ブレース本体１０８ａが、補強中桟１０４の切欠部１１３、及び補強中柱１０６の切欠部１２５を通過するように配設する。また、他方の対角位置にある隅部同志を耐力ブレース１０８で同様に接続する。この時、２本の耐力ブレース１０８は、補強中柱１０６の切欠部１２５において交差させる。最後に、前記ターンバックル１０８ｂを廻して、耐力ブレース１０８の張りを適宜調節する。
【００３３】
前記中桟補強部材及び中柱補強部材取付工程では、まず、前記中桟補強部材１０５を補強中桟１０４の切欠部１１３近傍に、第１曲折部１１１の切欠部１１３を中桟補強部材１０５の曲折部１１７で塞ぐようにして配設する。図１２は、中桟補強部材１０５の取り付け状態を示す図であり、図７におけるＢ−Ｂ断面を示している。図に示すように、中桟補強部材１０５の底部１１６及び曲折部１１７を、補強中桟１０４の底部１１０及び第１曲折部１１１にそれぞれ当接させ、中桟補強部材１０５の底部１１６のボルト穴１１５を、補強中桟１０４の底部１１０のボルト穴１０９に合わせた上でボルト２０７により固定する。次に、前記中柱補強部材１０７を補強中柱１０６の切欠部１２５近傍に、第１曲折部１２３の切欠部１２５を中柱補強部材１０７の底部１２７に設けられた補強板１３０で塞ぐようにして配設する。図１３は、中柱補強部材１０７の取り付け状態を示す図であり、図に示すように、中柱補強部材１０７の曲折部１２９及び底部１２７を、コの字型部材１１９の底部１２２及び第１曲折部１２３にそれぞれ当接させ、中柱補強部材１０７の曲折部１２９のボルト穴１２８を、コの字型部材１１９の底部１２２のボルト穴１２１に合わせた上でボルト２０７により固定する。なお、中桟補強部材１０５及び中柱補強部材１０７を、本実施形態と逆の順序で配設することももちろん可能である。
【００３４】
また、本発明に係る非耐力壁の耐力壁化工法、及び耐力壁の構造は、住宅等の増築時に限らず、新築時においても採用することが可能である。
【００３５】
【発明の効果】
以上説明したように、請求項１記載の非耐力壁の耐力壁化工法は、住宅等の増改築工事に際し、既存建築部における非耐力壁を形成する枠形状に配設された軸柱及び軸桟と、前記軸柱の長手方向中央部に前記軸桟と略平行して設けられた中桟と、前記軸桟の長手方向中央部に前記軸柱と略平行して設けられた中柱とを具備してなる軸組に、耐力ブレースを組み込んで耐力壁とする非耐力壁の耐力壁化工法であって、前記中柱の長手方向中間部を切除して上部中柱と下部中柱に分断するとともに、前記中桟の両端部を前記軸柱から切除する切除工程と、長手方向中央を挟んで略対称な位置に左右一対の切欠部がそれぞれ形成された２本の補強中桟を、その両端部を前記軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に設ける補強中桟取付工程と、長手方向中央部に切欠部が形成された補強中柱を、前記軸柱と略平行となるようにその両端部を上下の前記補強中桟の長手方向中央部にそれぞれ取り付ける補強中柱取付工程と、一対の前記耐力ブレースを、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部を、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定する耐力ブレース取付工程と、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材を、前記耐力ブレースを避けながらそれぞれ取り付ける補強部材取付工程とを含むものであるので、軸組全体を取り外したり新たに組み込んだりする手間を削減することができ、また、軸組を取り外す際に生じる内装のやり直し作業も不要となるので、省力化を図ることができる。
【００３６】
また、本発明によれば、非耐力壁を軸組ごと取り外す場合に比べて、産業廃棄物の発生量が大幅に削減され、その運搬及び処理に要するコストを低減することができる。
【００３７】
また、本発明によれば、ブレースの溶接作業が不要となるために、溶接の有資格者でない一般の作業者でも容易に施工することができると共に、施工の確実性を向上させることができる。
【００３８】
また、本発明によれば、既存の軸組の一部を切除して、耐力ブレースとの干渉を回避するための切欠部が形成された新たな部材を配設したことにより、軸組と干渉することなく、耐力ブレースを１段配置することが可能となる。これにより、耐力ブレースを２段配置する場合に比べて、耐力ブレースの傾斜角が小さくなり、耐力ブレースの降伏荷重が低くなる分、軸柱の座屈耐力を向上させることができる。
【００３９】
また、本発明によれば、耐力ブレースの組み込み作業を軸組の戸外側のみから行うことが可能となるので、内壁パネルを取り外す作業が不要となり、該作業に伴って生じる内装のやり直しの手間を削減することができる。
【００４０】
また、請求項２記載の非耐力壁の耐力壁化工法は、住宅等の増改築工事に際し、既存建築部における非耐力壁を形成する枠形状に配設された軸柱及び軸桟と、前記軸柱の長手方向中央部に前記軸桟と略平行して設けられた中桟と、前記軸桟の長手方向中央部に前記軸柱と略平行して設けられた中柱とを具備してなる軸組に、耐力ブレースを組み込んで耐力壁とする非耐力壁の耐力壁化工法であって、前記中柱の長手方向中間部を切除して上部中柱と下部中柱に分断するとともに、前記中桟の両端部を前記軸柱から切除する切除工程と、前記軸柱に沿って、該軸柱を補強するための補強軸柱を取り付ける補強軸柱取付工程と、長手方向中央を挟んで略対称な位置に左右一対の切欠部がそれぞれ形成された２本の補強中桟を、その両端部を前記補強軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に設ける補強中桟取付工程と、長手方向中央部に切欠部が形成された補強中柱を、前記軸柱と略平行となるようにその両端部を上下の前記補強中桟の長手方向中央部にそれぞれ取り付ける補強中柱取付工程と、一対の前記耐力ブレースを、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部を、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定する耐力ブレース取付工程と、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材を、前記耐力ブレースを避けながらそれぞれ取り付ける補強部材取付工程とを含むものであるので、請求項１記載の非耐力壁の耐力壁化工法の効果に加えて、軸柱の座屈耐力を更に向上させることができる。
【００４１】
また、請求項３記載の耐力壁の構造は、枠形状に配設された軸柱及び軸桟の内側に、該軸桟の長手方向中央部に前記軸柱と略平行して配設された中柱が、その長手方向中間部が切除されることにより上部中柱及び下部中柱に分断され、長手方向中央を挟んで略対称な位置に左右一対の切欠部が形成された補強中桟が、その両端部を前記軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に配設され、長手方向中央部に切欠部が形成された補強中柱が、その両端部を上下の前記補強中桟の長手方向中央部に取り付けることにより、前記軸柱と略平行して配設され、一対の耐力ブレースが、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部が、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定され、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材が、前記耐力ブレースを避けてそれぞれ配設されたものであるので、請求項１記載の非耐力壁の耐力壁化工法と同様の効果が得られる。
【００４２】
また、請求項４記載の耐力壁の構造は、枠形状に配設された軸柱及び軸桟の内側に、該軸桟の長手方向中央部に前記軸柱と略平行して配設された中柱が、その長手方向中間部が切除されることにより上部中柱及び下部中柱に分断され、前記軸柱を補強するための補強軸柱が前記軸柱に沿って配設され、長手方向中央を挟んで略対称な位置に左右一対の切欠部が形成された補強中桟が、その両端部を前記補強軸柱に取り付けるとともに、長手方向中央部をそれぞれ前記上部中柱の下端部、及び前記下部中柱の上端部に取り付けることにより、前記軸桟と略平行して上下２段に配設され、長手方向中央部に切欠部が形成された補強中柱が、その両端部を上下の前記補強中桟の長手方向中央部に取り付けることにより、前記軸柱と略平行して配設され、一対の耐力ブレースが、上下の前記補強中桟の前記切欠部を通過し、且つ、前記補強中柱の前記切欠部において互いに交差するようにして、それぞれの両端部が、前記軸柱と前記軸桟によって形成され相対角位置にある隅部に固定具により固定され、前記補強中桟の前記切欠部、及び前記補強中柱の前記切欠部を塞いで補強するための中桟補強部材、及び中柱補強部材が、前記耐力ブレースを避けてそれぞれ配設されたものであるので、請求項３記載の耐力壁の構造の効果に加えて、軸柱の座屈耐力を更に向上させることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態に係る耐力壁１００の軸組１０１を示す概略正面図。
【図２】本発明の実施形態に係る補強中桟１０４の構成を示す概略斜視図。
【図３】本発明の実施形態に係る中桟補強部材１０５の構成を示す概略斜視図。
【図４】本発明の実施形態に係る補強中柱１０６の構成を示す概略斜視図。
【図５】本発明の実施形態に係る中柱補強部材１０７の構成を示す概略斜視図
【図６】本発明の実施形態に係るブレース取付金具１０８ｃの構成を示す概略斜視図。
【図７】本発明の第２の実施形態に係る耐力壁２００の軸組２０１を示す概略正面図。
【図８】本発明の第２の実施形態に係る補強軸柱２０２を示す概略斜視図。
【図９】図７におけるＡ−Ａ断面を示す概略断面図。
【図１０】図７における位置Ｘを拡大した部分拡大図。
【図１１】図７における位置Ｙを拡大した部分拡大図。
【図１２】図７におけるＢ−Ｂ断面を示す概略断面図。
【図１３】本発明の実施形態に係る中柱補強部材１０７の取り付け状態を示す概略斜視図である。
【図１４】非耐力壁８０の軸組８１を示す概略正面図。
【符号の説明】
８０非耐力壁
８１，１０１，２０１軸組
８３軸柱
８４軸桟
８５中桟
８６中柱
１００，２００耐力壁
１０２上部中柱
１０３下部中柱
１０４補強中桟
１０５中桟補強部材
１０６補強中柱
１０７中柱補強部材
１０８耐力ブレース
１１３，１１８，１２５，１３１切欠部
２０２補強軸柱[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a construction method for structurally reinforcing a non-bearing wall in an existing building part into a load-bearing wall at the time of extension and renovation work for a house or the like.
[0002]
[Prior art]
In extension and renovation work such as housing, the non-bearing wall used in the existing building part may be subjected to a load on the upper part due to the change in the structure of the house. It is necessary to use a bearing wall. FIG. 14 is a diagram showing an example of the non-bearing wall, and shows a state in which the outer wall panel 82 is removed from the shaft set 81 of the non-bearing wall 80 and the shaft set 81 is exposed to the outdoor side. As shown in the figure, the frame-shaped shaft set 81 includes a pair of left and right shaft columns 83 that are parallel to each other, a pair of upper and lower shaft bars 84 that are orthogonal to the shaft columns 83, and a longitudinal center portion of the shaft column 83. The intermediate beam 85 provided in parallel to the shaft beam 84, and the middle column 86 provided in parallel to the shaft column 83 at the center in the longitudinal direction of the shaft beam 84. As a means for making such a non-bearing wall 81 into a load-bearing wall, there is a method in which the non-bearing wall 80 is removed from the outer wall portion together with its shaft set 81 and replaced with a shaft set of an existing load-bearing wall (not shown).
[0003]
In addition, as another means for converting a non-bearing wall to a bearing wall, a method of forming a bearing wall by adding a bearing brace that connects corners formed by the shaft assembly to each other without removing the shaft assembly of the non-bearing wall. There is also. In this case, both ends of the load-bearing brace are joined to the corner by welding, or a brace mounting bracket is attached to the corner by bolting, and both ends of the load-bearing brace are fixed to the brace mounting bracket by bolting. Thus, a load-bearing brace is added (see Patent Document 1).
[0004]
[Patent Document 1]
JP 2003-64807 A
[0005]
[Problems to be solved by the invention]
However, in the method of removing the non-bearing wall 80 together with the shaft set 81 from the outer wall portion and replacing it with the shaft set of the existing load-bearing wall, the shaft set 81 of the non-bearing wall 80 is removed or the shaft set of the load-bearing wall is incorporated. There is a problem that a lot of time and labor are required for the work. In addition, when the work to remove the shaft 81 of the non-bearing wall 80 is performed, it is necessary to redo the interior because the inner wall frame (not shown) is broken or the cloth pasted on the inner wall material is wrinkled. There is a problem that occurs.
[0006]
Further, there is a problem that a large amount of non-bearing walls 80 removed together with the shaft set 81 are generated as industrial waste, and it takes a lot of cost to transport and process this.
[0007]
In addition, in the method of adding a load bearing brace to the shaft of the non-bearing wall to make the load bearing wall, for example, if there is a middle beam inside the shaft, it is reinforced so as not to interfere with the reinforcing beam. In order to add a load-bearing brace without cutting the middle rail, the load-bearing brace needs to be arranged in two upper and lower stages. Furthermore, in the method of adding both ends of the load bearing brace to the corner of the shaft assembly by welding, there is a problem that the work cannot be performed unless it is a qualified person of welding. The reliability is low and there is a problem in the certainty of construction.
[0008]
In addition, in the method of using the brace mounting bracket to add a strength brace to the shaft assembly, in order to perform the work of mounting the brace mounting bracket by bolting to the corner portion, the shape of the brace mounting bracket is used. You can only work from the inside. Therefore, since it is necessary to perform the work by removing the inner wall panel, there is a problem that the interior may have to be redone, for example, a wrinkle is formed on the cloth pasted on the inner wall panel, as described above. .
[0009]
The present invention has been made in view of such problems, and in the case of extension work such as a house, a non-bearing wall of an existing building part is made into a bearing wall having sufficient strength without removing the entire shaft assembly. Therefore, it aims at providing the means which enables labor saving and reduction of industrial waste.
[0010]
[Means for Solving the Problems]
The present invention relates to a shaft column and a shaft beam arranged in a frame shape that forms a non-bearing wall in an existing building part, and a shaft beam substantially in the longitudinal center of the shaft column in the case of extension and renovation work of a house or the like. A bearing wall in which a bearing brace is incorporated into a shaft set including a center beam provided in parallel and a center column provided substantially in parallel with the shaft column at the longitudinal center of the shaft beam, A non-bearing wall bearing wall construction method, in which a middle portion in the longitudinal direction of the middle column is cut out to be divided into an upper middle column and a lower middle column, and both end portions of the middle beam are cut from the shaft column The cutting step and the two reinforcing middle beams formed with a pair of left and right cutouts at substantially symmetrical positions across the longitudinal center are attached to both ends of the shaft and the longitudinal center is respectively By attaching to the lower end of the upper middle column and the upper end of the lower middle column Reinforcing middle beam mounting step provided in two upper and lower stages substantially parallel to the shaft beam, and a reinforcing middle column formed with a notch in the central portion in the longitudinal direction, both end portions thereof so as to be substantially parallel to the shaft column Reinforcing middle column attaching step to be respectively attached to the longitudinal center part of the upper and lower reinforcing middle beam, and a pair of the load-bearing braces, passing through the notch portions of the upper and lower reinforcing middle beam, and the reinforcing middle column A load-bearing brace attaching step for fixing each end of each notch portion to a corner portion formed by the shaft column and the shaft rail and having a relative angular position with a fixing tool, And a reinforcing member attaching step for attaching the intermediate beam reinforcing member for closing and reinforcing the notched portion and the notched portion of the reinforcing middle column, and the middle column reinforcing member while avoiding the strength brace.
[0011]
In addition, the present invention provides a shaft column and a shaft beam arranged in a frame shape that forms a non-bearing wall in an existing building part, and a shaft beam at a longitudinal center portion of the shaft column in the case of an extension or renovation work of a house or the like. Strength bearing brace is incorporated into a shaft assembly comprising a middle beam provided substantially parallel to the middle beam and a middle column provided substantially parallel to the shaft column at the longitudinal center of the shaft beam. It is a load-bearing wall construction method of a non-bearing wall as a wall, and cuts an intermediate portion in the longitudinal direction of the middle column to divide it into an upper middle column and a lower middle column, and both ends of the middle beam from the shaft column A cutting step for cutting, a reinforcing shaft column mounting step for mounting a reinforcing shaft column for reinforcing the shaft column along the shaft column, and a pair of left and right cutout portions at substantially symmetrical positions across the center in the longitudinal direction Two reinforcing middle bars formed respectively are attached to both ends of the reinforcing shaft column and long. Reinforcing middle beam mounting step provided in two upper and lower stages substantially parallel to the shaft beam, by attaching the center portion in the direction to the lower end portion of the upper middle column and the upper end portion of the lower middle column, respectively, Reinforcing middle pillar mounting steps for attaching both ends of the reinforcing middle pillars formed with notches to the longitudinal center of the reinforcing middle rails so as to be substantially parallel to the axial pillar, The load-bearing braces pass through the cutout portions of the upper and lower reinforcing intermediate bars and intersect with each other at the notched portions of the reinforcing intermediate pillars, and both ends thereof are formed by the shaft pillar and the shaft rail. Strength-bearing brace mounting step that is fixed to a corner portion that is formed at a relative angular position by a fixing tool, the notch portion of the reinforcing middle beam, and the middle beam reinforcing member for closing and reinforcing the notch portion of the reinforcing middle beam And the middle column reinforcement member It is intended to include a reinforcing member mounting step of mounting each while avoiding the strength brace.
[0012]
Further, according to the present invention, an inner column disposed substantially parallel to the shaft column at the center in the longitudinal direction of the shaft column is disposed on the inner side of the shaft column and the shaft column disposed in a frame shape. The middle part of the reinforcing middle beam is divided into an upper middle pillar and a lower middle pillar, and a pair of left and right cutouts are formed at substantially symmetrical positions across the center in the longitudinal direction. Attaching to the pillar and attaching the central part in the longitudinal direction to the lower end part of the upper middle pillar and the upper end part of the lower middle pillar, respectively, it is arranged in two upper and lower stages substantially parallel to the shaft rail. Reinforcing middle pillars having a notch formed in the central part are arranged substantially in parallel with the axial pillars by attaching both ends thereof to the longitudinal central part of the upper and lower reinforcing middle bars, and a pair of load-bearing braces Passes through the notch portions of the upper and lower reinforcing middle bars, and the middle reinforcing pillars The both ends of the notch portion are fixed to a corner portion formed by the shaft column and the shaft rail at a relative angular position by a fixing tool so as to intersect with each other, and the notch portion of the reinforcing middle beam, In addition, a middle beam reinforcing member and a middle column reinforcing member for closing and reinforcing the notch portion of the reinforcing middle column are disposed so as to avoid the load-bearing brace.
[0013]
Further, according to the present invention, an inner column disposed substantially parallel to the shaft column at the center in the longitudinal direction of the shaft column is disposed on the inner side of the shaft column and the shaft column disposed in a frame shape. The middle part is cut off to be divided into an upper middle column and a lower middle column, and a reinforcing shaft column for reinforcing the shaft column is disposed along the shaft column, and is substantially symmetrical with respect to the center in the longitudinal direction. Reinforcing middle rails having a pair of left and right cutouts at positions are attached to both ends of the reinforcing shaft column, and the longitudinal center is respectively the lower end of the upper middle column and the upper end of the lower middle column. By attaching to the reinforcing bars, the reinforcing middle pillars are arranged in two steps in the vertical direction substantially parallel to the shaft rail, and a notch is formed in the central portion in the longitudinal direction. By attaching to the central part, it is arranged substantially parallel to the shaft column, and a pair of load bearing braces However, both end portions are formed by the shaft column and the shaft beam so as to pass through the notch portions of the upper and lower reinforcing middle beam and cross each other at the notch portion of the reinforcing middle column. A middle beam reinforcing member and a middle column reinforcing member that are fixed to a corner portion at a relative angular position by a fixing tool, and that close and reinforce the notched portion of the reinforcing middle beam and the notched portion of the reinforcing middle column. These are arranged so as to avoid the load-bearing braces.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a bearing wall construction method for a non-bearing wall according to the first embodiment of the present invention will be described with reference to the drawings. The load-bearing wall construction method of the non-bearing wall according to this embodiment is applied to the non-bearing wall 80 shown in FIG. FIG. 1 is a schematic front view showing a shaft set 101 of a load-bearing wall 100 according to the present embodiment, in which the outer wall panel 82 is removed from the shaft set 101 of the non-bearing wall 100 and the shaft set 101 is exposed to the outdoor side. Is shown. In FIG. 1, the same components as those of the non-bearing wall 80 are denoted by the same reference numerals. As shown in the figure, the bearing wall 100 includes a pair of left and right shaft columns 83 parallel to each other, a pair of upper and lower shaft bars 84 orthogonal to the shaft column 83, and a middle portion in the longitudinal direction of the middle column 86. The upper middle column 102 and the lower middle column 103 which are separated by cutting, a reinforcing middle beam 104 provided parallel to the shaft beam 84, and a middle beam reinforcing member 105 which reinforces the reinforcing middle beam 104, Further, a proof brace 108 is incorporated in a shaft group 101 including a reinforcing middle column 106 provided in parallel with the shaft column 83 and a middle column reinforcing member 107 that reinforces the reinforcing middle column 106. is there. Hereinafter, each component will be described in more detail.
[0015]
Although not shown in detail in the drawing, the pair of left and right shaft pillars 83 is a so-called C-shaped steel having a substantially U-shaped cross section disposed with its opening facing inward, and adjacent bearing walls 100 axial pillars 83 are fastened back to back with bolts. Further, the pair of upper and lower shaft bars 84 provided orthogonal to the shaft column 83 is a so-called C-shaped steel with its opening facing inward, like the shaft column 83. Both ends are fixed to the end of the shaft column 83 by welding.
[0016]
The upper middle column 102 and the lower middle column 103 are separated and left by cutting away the middle portion in the longitudinal direction of the middle column 86 in the shaft set 81 shown in FIG. Although not shown in detail in the drawing, the upper middle column 102 and the lower middle column 103 are formed by fixing two U-shaped steels by welding so that their openings face each other.
[0017]
FIG. 2 is a schematic perspective view showing the configuration of the reinforcing middle rail 104. As shown in the figure, the reinforcing intermediate beam 104 has a bottom portion 110 provided with a bolt hole 109, and a first bent portion 111 and a second bent portion 112 perpendicular to the bottom portion 110, and has a substantially U-shaped longitudinal section. A pair of left and right cutouts 113 are formed from the first bent portion 111 to the bottom portion 110 at positions substantially symmetrical with respect to the center in the longitudinal direction. Thus, when the load-bearing brace 108 is disposed, the load-bearing brace 108 and the reinforcing middle rail 104 do not interfere with each other by passing the notch 113. The position where the notch 113 is formed in the reinforcing crosspiece 104 and the shape thereof are not limited to this embodiment, and the design can be appropriately changed according to the position where the interference with the strength brace 108 occurs, the inclination angle of the strength brace 108, and the like. Although it is possible, it is preferable that the size of the reinforcing intermediate beam 104 be set to a size that can suppress a decrease in strength to a minimum.
[0018]
In addition, as shown in FIG. 2, attachment pieces 114 are disposed at both ends in the longitudinal direction of the reinforcing middle rail 104. As shown in FIG. 1, the attachment piece 114 is for attaching both end portions of the reinforcing middle beam 104 to the shaft column 83, and is an L-shape comprising a first section 114a and a second section 114b orthogonal to each other. It is a member. The attachment piece 114 is attached by joining the first section 114a to the bottom 110 of the reinforcing middle rail 104 by welding or the like. Further, a reinforcing member 104c is provided at a corner formed by the first section 114a and the second section 114b, and the attachment piece 114 is reinforced.
[0019]
The intermediate beam reinforcing member 105 is attached so as to close the notch 113 of the reinforcing intermediate beam 104, and reinforces the strength reduction of the reinforcing intermediate beam 104 due to the formation of the notch 113. FIG. 3 is a schematic perspective view showing the configuration of the middle beam reinforcing member 105. As shown in the figure, the middle beam reinforcing member 105 has a bottom portion 116 provided with a bolt hole 115 and a bent portion perpendicular to the bottom portion 116. An L-shaped member composed of a portion 117, and a notch 118 is formed in the middle in the longitudinal direction of the bottom 116, and by passing the notch 118 when the load bearing brace 108 is disposed, The load-bearing brace 108 and the intermediate beam reinforcing member 105 do not interfere with each other. Further, the width dimension W2 and the height dimension H2 of the middle beam reinforcing member 105 are formed slightly smaller than the width dimension W1 and the height dimension H1 of the reinforcing middle beam 104, and the middle beam reinforcing member 105 is reinforced. It is possible to arrange it in contact with the inner peripheral surface. On the other hand, the longitudinal dimension L2 of the intermediate beam reinforcing member 105 is not particularly limited. However, when the intermediate beam reinforcing member 105 is disposed in the vicinity of the notch 113 of the reinforcing intermediate beam 104, the end portion thereof does not interfere with the mounting piece 114. There is a need.
[0020]
FIG. 4 is a schematic perspective view showing the configuration of the reinforcing middle pillar 106. As shown in the figure, the reinforcing middle column 106 is formed by joining two U-shaped members 119 having a substantially U-shaped longitudinal section to each other via a plate 120. The member 119 includes a bottom portion 122 provided with a bolt hole 121, a first bent portion 123 and a second bent portion 124 orthogonal to the bottom portion 122. In addition, a notch 125 is formed in the longitudinal center of the two U-shaped members 119 from the first bent part 123 to the bottom 122, and the notch is disposed when the strength brace 108 is disposed. By passing the portion 125, the load-bearing brace 108 and the reinforcing middle column 106 do not interfere with each other. The position where the notch 125 is formed and the shape thereof are not limited to this embodiment, and the design can be appropriately changed according to the position where the interference with the strength brace 108 occurs, the inclination angle of the strength brace 108, and the like. It is preferable that the size of the reinforcing middle column 106 be reduced to a minimum.
[0021]
Further, as shown in FIG. 4, attachment pieces 126 are respectively disposed at both ends in the longitudinal direction of the two U-shaped members 119 constituting the reinforcing middle column 106. As shown in FIG. 1, the attachment piece 126 is for attaching both ends of the reinforcing middle column 106 to the reinforcing middle beam 104, and includes a first piece 126a and a second piece 126b orthogonal to each other. It is an L-shaped member. The attachment piece 126 is attached by joining the first piece 126a to the bottom 122 of the reinforcing middle column 106 by welding or the like. Further, a reinforcing member 126c is provided at a corner portion formed by the first section 126a and the second section 126b, and the attachment piece 126 is reinforced.
[0022]
The middle column reinforcing member 107 is attached so as to close the notch 125 of the reinforcing middle column 106, and reinforces the strength reduction of the reinforcing middle column 106 due to the formation of the notch 125. FIG. 5 is a schematic perspective view showing the configuration of the middle column reinforcing member 107. As shown in the figure, the middle column reinforcing member 107 is provided with a bottom portion 127, a substantially perpendicular portion to the bottom portion 127, and a bolt hole 128. It is an L-shaped member comprising a bent portion 129 and a reinforcing plate 130 joined to the back side surface of the bottom portion 127. The width dimension W4 and the height dimension H4 of the middle pillar reinforcing member 107 are formed slightly smaller than the width dimension W3 and the height dimension H3 of the U-shaped member 119 constituting the reinforcing middle pillar 106. Can be disposed in contact with the inner peripheral surface of the reinforcing middle column 106. Further, the central portion in the longitudinal direction of the bent portion 129 is cut out in the width direction, and the strength brace 108 and the middle column reinforcing member 107 are passed by passing the notch 131 when the strength brace 108 is disposed. Is not interfering.
[0023]
The load-bearing brace 108 reinforces the shaft set 101 by connecting corners formed by the shaft column 83 and the shaft bar 84 at relative angular positions. As shown in FIG. 1, the strength brace 108 includes two brace bodies 108 a made of thin round bars and the like, and a turnbuckle for connecting the two brace bodies 108 a to each other and adjusting the tension of the strength brace 108. 108 b and brace mounting brackets 108 c for fixing the strength braces 108 to the corners of the shaft set 101, which are fixed to opposite ends of the two brace bodies 108 a by welding or the like. When attaching the load-bearing brace 108, first, the brace mounting bracket 108c is fixed to the corner with a fixing tool such as a bolt (not shown), and then the tension is adjusted by turning the turnbuckle 108b.
[0024]
FIG. 6 is a schematic perspective view showing the configuration of the brace mounting bracket 108c. As shown in the drawing, the brace mounting bracket 108c includes an L-shaped member 134 having a shaft column joint portion 132 and a shaft rail joint portion 133, a front plate 136 having a notch 135 formed therein, a rear plate 137, and a reinforcing member. The plate 138 is fixed, and is attached to the corner portion of the shaft set 101 so that the front plate 136 faces the outdoor side. When the brace mounting bracket 108c is mounted, the shaft column joint 132 and the shaft beam joint 133 are brought into contact with the shaft column 83 and the shaft beam 84, respectively, at the corners, and are provided in the shaft column joint 132. In the bolt hole 139 and the bolt hole 140 provided in the shaft crosspiece joint part 133, they are respectively fixed by a fixing tool such as a bolt (not shown). At this time, the operator can perform a fixing operation by inserting a hand from the notch 135 formed in the front plate 136 into the brace mounting bracket 108c. As a result, it is possible to perform the work of attaching the brace mounting bracket 108c only from the outdoor side of the shaft set 101, and it becomes unnecessary to remove an inner wall panel (not shown) provided on the indoor side of the shaft set 101. It is possible to reduce the trouble of redoing the interior caused by the work.
[0025]
Hereinafter, the bearing wall construction method of the non-bearing wall according to the second embodiment of the present invention will be described with reference to the drawings. The load-bearing wall construction method of the non-bearing wall according to the present embodiment is applied to the non-bearing wall 80 shown in FIG. 14, and in particular, the shaft column 83 is made of a steel material having a predetermined thickness or less, and a seat. It is constructed when the yield strength is not sufficient. FIG. 7 is a schematic front view showing the shaft set 201 of the load bearing wall 200 according to the present embodiment, in which the outer wall panel 82 is removed from the shaft set 201 of the non-bearing wall 200 and the shaft set 201 is exposed to the outdoor side. Is shown. As shown in the figure, the shaft set 201 according to the present embodiment is the first except that a reinforcing shaft column 202 for reinforcing the shaft column 83 is provided along the longitudinal direction of the shaft column 83. The structure is the same as that of the shaft set 101 of the bearing wall 100 according to the embodiment. In the figure, the same members as those of the shaft set 101 are denoted by the same reference numerals, and detailed description thereof is omitted here.
[0026]
The reinforcing shaft column 202 is attached along the shaft column 83 to reinforce the shaft column 83, and prevents the shaft column 83 from being easily buckled when the shaft column 83 is made of a steel material having a predetermined thickness or less. is there. FIG. 8 is a schematic perspective view showing the reinforcing shaft column 202. As shown in the figure, the reinforcing shaft column 202 includes a bottom portion 204 provided with a bolt hole 203, and a first bent portion 205 orthogonal to the bottom portion 204. , And a second bent portion 206, the longitudinal section is a substantially hat-shaped member. The width dimension W5 of the bottom 204 of the reinforcing shaft column 202 is formed to be smaller than the width of the opening of the shaft column 83 made of C-type steel, so that the reinforcing shaft column 202 can be mounted inside the shaft column 83. .
[0027]
Hereinafter, the construction procedure of the non-bearing wall bearing wall construction method according to the present embodiment will be described. The non-bearing wall bearing wall construction method according to the present embodiment includes a cutting process, a reinforcing shaft column mounting process, a reinforcing middle beam mounting process, a reinforcing middle column mounting process, a load bearing brace mounting process, and a reinforcing member mounting process. And comprising. Hereinafter, each step will be described in more detail.
[0028]
In the existing shaft group cutting step, first, in the shaft group 81 of the non-bearing wall 80 shown in FIG. 14, the longitudinal intermediate portion of the middle column 86 is cut into the upper middle column 102 and the lower middle column 103, Further, the middle bar 85 is cut off at the connection portions with the shaft column 83 at both ends thereof. In addition, as a tool used for the cutting of the middle pillar 86 and the middle rail 85, for example, a metal cutter (not shown) can be used.
[0029]
In the reinforcing shaft column attaching step, the reinforcing shaft column 202 is attached so as to be along the longitudinal direction of the shaft column 83. FIG. 9 is a view showing a state in which the reinforcing shaft column 202 is attached to the shaft column 83, and shows a cross section taken along the line AA in FIG. As shown in the figure, the bottom portion 204 of the reinforcing shaft column 202 is brought into contact with the web surface 83 a inside the shaft column 83, and then fixed with bolts 207 in the bolt holes 203 provided in the bottom portion 204. In the case of the first embodiment, that is, in the case where the reinforcing shaft column 202 is not provided, this step is omitted and the process proceeds to the next reinforcing beam mounting step.
[0030]
In the reinforcing middle beam attaching step, as shown in FIG. 7, both end portions of the reinforcing middle beam 104 are attached to the longitudinal center portion of the reinforcing shaft column 202. FIG. 10 is an enlarged view of the position X in FIG. 7. As shown in FIG. 10, one end portion of the L-shaped plate P is brought into contact with the web surface 103a of the lower middle pillar 103 and fixed by bolting. At the same time, the other end is brought into contact with the bottom 110 of the reinforcing middle rail 104 and fixed by bolting. On the other hand, FIG. 11 is an enlarged view of the position Y in FIG. 7. As shown in the figure, the second sections 114 b of the attachment pieces 114 provided at both ends of the reinforcing middle rail 104 are replaced with the reinforcing shaft column 202. It is made to contact | abut to the bottom part 204 of this, and it fixes by bolting. Further, although details are not shown in the drawing, in the case of the first embodiment, the second section 114b of the mounting piece 114 may be fixed in contact with the web surface 83a of the shaft column 83.
[0031]
In the reinforcing middle column attaching step, both ends of the reinforcing middle column 106 are respectively connected to the reinforcing middle beam 104. In more detail, as shown in FIG. 10, the second section 126 b of the attachment piece 126 provided at one end of the reinforcing middle column 106 is connected to the bottom 110 of the reinforcing middle beam 104 connected to the lower middle column 103. And affix them with bolts. On the other hand, the second section 126b of the attachment piece 126 provided at the other end portion of the reinforcing middle column 106 is not shown in detail in the drawing, but similarly, the bottom 110 of the reinforcing middle beam 104 connected to the upper middle column 102. To fix each.
[0032]
In the load bearing brace attaching step, the corners of the shaft set 201 are connected by the load bearing brace 108. In more detail, as shown in FIG. 7, one brace mounting bracket 108c of the load-bearing brace 108 is disposed at a corner formed by the shaft column 83 and the shaft bar 84, and is fixed by a fixing tool such as a bolt. To do. Further, the other brace mounting bracket 108c is arranged at the corner at the diagonal position and fixed by bolting. At this time, the brace body 108a is disposed so as to pass through the notch 113 of the reinforcing middle rail 104 and the notch 125 of the reinforcing middle pillar 106. Further, the corners at the other diagonal position are similarly connected by the load-bearing brace 108. At this time, the two strength braces 108 intersect at the notch 125 of the reinforcing middle column 106. Finally, the turnbuckle 108b is turned to appropriately adjust the tension of the strength brace 108.
[0033]
In the middle beam reinforcing member and middle column reinforcing member attaching step, first, the middle beam reinforcing member 105 is placed in the vicinity of the cutout portion 113 of the reinforcing middle beam 104, and the notch portion 113 of the first bent portion 111 is placed in the middle beam reinforcing member 105. It arrange | positions so that it may block | close with the bending part 117. FIG. FIG. 12 is a view showing a state where the middle rail reinforcing member 105 is attached, and shows a cross section taken along the line BB in FIG. As shown in the figure, the bottom portion 116 and the bent portion 117 of the middle beam reinforcing member 105 are brought into contact with the bottom portion 110 and the first bent portion 111 of the reinforcing middle beam 104, respectively, so that the bolt holes in the bottom portion 116 of the middle beam reinforcing member 105 are provided. 115 is matched with the bolt hole 109 at the bottom 110 of the reinforcing middle rail 104 and then fixed with the bolt 207. Next, the middle column reinforcing member 107 is closed in the vicinity of the notched portion 125 of the reinforcing middle column 106, and the notched portion 125 of the first bent portion 123 is closed with the reinforcing plate 130 provided on the bottom portion 127 of the middle column reinforcing member 107. Arrange. FIG. 13 is a view showing a state in which the middle column reinforcing member 107 is attached. As shown in the figure, the bent portion 129 and the bottom portion 127 of the middle column reinforcing member 107 are replaced with the bottom portion 122 and the first portion of the U-shaped member 119. The bolt holes 128 of the bent portion 129 of the middle column reinforcing member 107 are aligned with the bolt holes 121 of the bottom portion 122 of the U-shaped member 119 and fixed with the bolts 207. Of course, the middle rail reinforcing member 105 and the middle column reinforcing member 107 can be disposed in the reverse order of the present embodiment.
[0034]
Moreover, the load-bearing wall construction method of the non-bearing wall and the structure of the load-bearing wall according to the present invention can be employed not only at the time of extension of a house or the like but also at the time of new construction.
[0035]
【The invention's effect】
As described above, the load-bearing wall construction method of the non-bearing wall according to claim 1 is a shaft column and a shaft arranged in a frame shape that forms the non-bearing wall in the existing building part in the case of extension and renovation work of a house or the like. A crosspiece, a middle crosspiece provided substantially parallel to the axial crosspiece at the longitudinal center of the shaft post, and a middle post provided substantially parallel to the axial post at the central portion of the axial post A bearing wall construction method of a non-bearing wall that incorporates a bearing brace into a shaft assembly comprising a bearing wall, and cuts the middle part in the longitudinal direction of the middle pillar into an upper middle pillar and a lower middle pillar. A cutting step for cutting both ends of the middle beam from the shaft column, and two reinforcing middle beams formed with a pair of left and right cutouts at substantially symmetrical positions across the longitudinal center, The both ends are attached to the shaft column, and the longitudinal center is the lower end of the upper middle column. And, by attaching to the upper end portion of the lower middle pillar, a reinforcing middle rail mounting step provided in two steps above and below substantially parallel to the shaft rail, and a reinforcing middle pillar in which a notch portion is formed in the central portion in the longitudinal direction, Reinforcing middle column attaching step for attaching both ends of the axial column to the longitudinal center part of the upper and lower reinforcing middle beams so as to be substantially parallel to the axial column, and a pair of load-bearing braces, A fixture that passes through the notch and intersects with each other at the notch of the reinforcing middle column, and has both ends fixed to corners that are formed by the shaft column and the shaft rail and are at relative angular positions. A strength-bearing brace mounting step that is fixed by: a notch portion of the reinforcing middle beam, a middle beam reinforcing member for closing and reinforcing the notch portion of the reinforcing middle column, and a middle column reinforcing member. Take each while avoiding This includes the step of attaching the reinforcing member to be attached, so that it is possible to reduce the trouble of removing or newly installing the entire shaft assembly, and also eliminates the need for interior rework when removing the shaft assembly. Can be achieved.
[0036]
Moreover, according to this invention, compared with the case where a non-bearing wall is removed with a shaft set, the amount of industrial waste generated can be greatly reduced, and the cost required for its transportation and processing can be reduced.
[0037]
Further, according to the present invention, since the brace welding work is not required, it is possible for a general worker who is not a qualified person for welding to easily perform the work and to improve the certainty of the work.
[0038]
In addition, according to the present invention, a part of an existing shaft group is cut out, and a new member having a notch portion for avoiding interference with the load-bearing brace is disposed, so that the shaft group interferes with the shaft group. Without having to do so, it is possible to dispose one load-bearing brace. As a result, the buckling strength of the shaft column can be improved as the yield angle of the load-bearing brace is reduced because the inclination angle of the load-bearing brace is smaller and the yield load of the load-bearing brace is lower than when two steps of load-bearing braces are arranged.
[0039]
In addition, according to the present invention, it is possible to perform the work of installing the load-bearing brace only from the outside of the shaft assembly, so that the work of removing the inner wall panel is not required, and the work of redoing the interior caused by the work is eliminated. Can be reduced.
[0040]
In addition, the load-bearing wall construction method of the non-bearing wall according to claim 2 includes a shaft column and a shaft rail arranged in a frame shape that forms a non-bearing wall in an existing building part during extension and renovation work of a house, etc. An intermediate beam provided substantially parallel to the shaft beam in the longitudinal center portion of the shaft column, and a middle column provided approximately parallel to the shaft column in the longitudinal direction center portion of the shaft beam. A bearing wall construction method of a non-bearing wall that incorporates a load bearing brace into the shaft assembly, and cuts the middle part in the longitudinal direction of the middle pillar and divides it into an upper middle pillar and a lower middle pillar, A cutting step for cutting both ends of the middle rail from the shaft column, a reinforcing shaft column mounting step for mounting a reinforcing shaft column for reinforcing the shaft column along the shaft column, and a center in the longitudinal direction. Two reinforcing middle bars, each having a pair of left and right cutouts at substantially symmetrical positions, are arranged at both ends thereof. Reinforced middle beam attachments that are installed in two upper and lower stages substantially parallel to the shaft beam by attaching to the shaft column and attaching the longitudinal center portion to the lower end portion of the upper middle column and the upper end portion of the lower middle column, respectively. Reinforcing middle pillars for attaching a reinforcing middle pillar having a notch portion formed in the longitudinal center part thereof to the longitudinal middle part of the upper and lower reinforcing middle rails so that both ends thereof are substantially parallel to the axial pillar An attachment step and a pair of the load-bearing braces, passing through the cutout portions of the upper and lower reinforcing intermediate bars and intersecting each other at the cutout portions of the reinforcing intermediate pillars, Strength-bearing brace mounting step, which is formed by a shaft column and the shaft beam and fixed to a corner portion at a relative angular position by a fixing tool, the notch portion of the reinforcing middle beam, and the notch portion of the reinforcing middle column are closed and reinforced. To do In addition to the effect of the non-bearing wall bearing wall construction method according to claim 1, the reinforcing member and the middle column reinforcing member include a reinforcing member attaching step for attaching the reinforcing member and the middle pillar reinforcing member while avoiding the bearing brace. The buckling strength can be further improved.
[0041]
Further, the structure of the bearing wall according to claim 3 is disposed inside the shaft column and the shaft rail arranged in a frame shape, and substantially parallel to the shaft column at a central portion in the longitudinal direction of the shaft rail. The middle pillar is divided into an upper middle pillar and a lower middle pillar by cutting the middle part in the longitudinal direction, and there is a reinforcing middle beam in which a pair of left and right cutouts are formed at substantially symmetrical positions across the middle in the longitudinal direction. In addition to attaching both end portions to the shaft column and attaching the longitudinal center portion to the lower end portion of the upper middle column and the upper end portion of the lower middle column, respectively, the upper and lower stages are substantially parallel to the shaft rail. Reinforced middle pillars arranged in the longitudinal direction and having a notch formed in the central part in the longitudinal direction are arranged substantially parallel to the axial pillars by attaching both ends thereof to the longitudinal central part of the upper and lower reinforcing middle bars. A pair of load-bearing braces pass through the notch portions of the upper and lower reinforcing intermediate bars. Further, both ends of the middle part of the reinforcing middle column intersect with each other so that each end part is fixed to a corner part formed by the shaft pillar and the shaft rail at a relative angular position by a fixing tool, and the reinforcement Since the middle rail reinforcing member and the middle column reinforcing member for closing and reinforcing the notch portion of the middle rail and the notched portion of the reinforcing middle pillar are arranged to avoid the load-bearing brace, respectively. The effect similar to the load-bearing wall construction method of the non-bearing wall according to claim 1 can be obtained.
[0042]
In addition, the structure of the load bearing wall according to claim 4 is disposed inside the shaft pillar and the shaft rail arranged in a frame shape, and substantially parallel to the shaft pillar at the center in the longitudinal direction of the shaft rail. The middle column is divided into an upper middle column and a lower middle column by cutting away the middle portion in the longitudinal direction, and a reinforcing shaft column for reinforcing the shaft column is disposed along the shaft column. Reinforcing middle rails in which a pair of left and right cutouts are formed at substantially symmetrical positions across the center, both end portions thereof are attached to the reinforcing shaft column, and the longitudinal center portion is respectively the lower end portion of the upper middle column, and By attaching to the upper end portion of the lower middle column, the reinforcing middle column is arranged in two upper and lower stages substantially parallel to the shaft rail, and a notch portion is formed in the central portion in the longitudinal direction. By being attached to the central part in the longitudinal direction of the reinforcing middle beam, it is arranged substantially parallel to the shaft column. A pair of load-bearing braces pass through the cutout portions of the upper and lower reinforcing intermediate bars and intersect each other at the cutout portions of the reinforcing intermediate pillars, so that both end portions thereof A middle beam reinforcing member formed by a shaft beam and fixed to a corner portion at a relative angular position by a fixture, and the middle beam reinforcing member for closing and reinforcing the notch portion of the reinforcing middle beam and the notch portion of the reinforcing middle column; and Since the middle column reinforcing members are arranged so as to avoid the load bearing braces, the buckling strength of the shaft column can be further improved in addition to the effect of the structure of the load bearing wall according to claim 3. .
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a shaft set 101 of a load bearing wall 100 according to a first embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a configuration of a reinforcing middle rail 104 according to the embodiment of the present invention.
FIG. 3 is a schematic perspective view showing a configuration of a middle beam reinforcing member 105 according to the embodiment of the present invention.
FIG. 4 is a schematic perspective view showing a configuration of a reinforcing middle column 106 according to the embodiment of the present invention.
FIG. 5 is a schematic perspective view showing the configuration of the middle column reinforcing member 107 according to the embodiment of the present invention.
FIG. 6 is a schematic perspective view showing the configuration of a brace mounting bracket 108c according to the embodiment of the present invention.
FIG. 7 is a schematic front view showing a shaft set 201 of a load bearing wall 200 according to a second embodiment of the present invention.
FIG. 8 is a schematic perspective view showing a reinforcing shaft column 202 according to a second embodiment of the present invention.
9 is a schematic cross-sectional view showing a cross section AA in FIG. 7;
FIG. 10 is a partially enlarged view in which the position X in FIG. 7 is enlarged.
11 is a partially enlarged view in which the position Y in FIG. 7 is enlarged.
12 is a schematic cross-sectional view showing a BB cross section in FIG. 7;
FIG. 13 is a schematic perspective view showing an attached state of the middle column reinforcing member 107 according to the embodiment of the present invention.
14 is a schematic front view showing a shaft set 81 of a non-bearing wall 80. FIG.
[Explanation of symbols]
80 Non-bearing wall
81, 101, 201 axle
83 Axle
84 axle
85 Middle pier
86 Middle Pillar
100, 200 bearing wall
102 Upper middle pillar
103 Lower middle pillar
104 Reinforced middle rail
105 Middle rail reinforcement member
106 Reinforcing middle pillar
107 Column reinforcement
108 Strength brace
113, 118, 125, 131 Notch
202 Reinforced shaft column

Claims

For extension and renovation work of houses, etc., provided in a frame shape that forms a non-bearing wall in the existing building part, and provided in a longitudinally central portion of the shaft pillar substantially parallel to the shaft pole A non-bearing wall that incorporates a load-bearing brace into a shaft set that includes the middle beam that is formed and a middle column that is provided substantially in parallel with the shaft column at the longitudinal center of the shaft beam. The bearing wall construction method of
Cutting the middle part in the longitudinal direction of the middle pillar and dividing it into an upper middle pillar and a lower middle pillar, and a cutting process for cutting both end parts of the middle rail from the shaft pillar,
Two reinforcing middle rails each having a pair of left and right cutouts formed at substantially symmetrical positions with the longitudinal center in between are attached to both ends of the central pillar, and the longitudinal central portion is respectively connected to the upper middle pillar. A reinforcing middle beam attaching step provided in two stages above and below substantially parallel to the shaft beam, by attaching to the lower end of the lower middle column and the upper end portion of the lower middle column,
Reinforcing middle column attaching step for attaching the reinforcing middle columns formed with a notch in the middle in the longitudinal direction to the longitudinal middle portions of the upper and lower reinforcing middle bars so that both ends thereof are substantially parallel to the axial column; ,
A pair of the load-bearing braces pass through the cutout portions of the upper and lower reinforcing intermediate bars and intersect each other at the cutout portions of the reinforcing intermediate pillars, and both ends thereof are connected to the shaft column and the A load-bearing brace mounting step that is fixed by a fixing tool at a corner portion that is formed by a shaft rail and is at a relative angular position;
A reinforcing member attaching step for attaching the notch portion of the reinforcing middle beam and a middle beam reinforcing member for closing and reinforcing the notched portion of the reinforcing middle column, and the middle column reinforcing member while avoiding the load-bearing brace, and A non-bearing wall bearing wall construction method characterized by comprising

For extension and renovation work of houses, etc., provided in a frame shape that forms a non-bearing wall in the existing building part, and provided in a longitudinally central portion of the shaft pillar substantially parallel to the shaft pole A non-bearing wall that incorporates a load-bearing brace into a shaft set that includes the middle beam that is formed and a middle column that is provided substantially in parallel with the shaft column at the longitudinal center of the shaft beam. The bearing wall construction method of
Cutting the middle part in the longitudinal direction of the middle pillar and dividing it into an upper middle pillar and a lower middle pillar, and a cutting process for cutting both end parts of the middle rail from the shaft pillar,
A reinforcing shaft column attaching step for attaching a reinforcing shaft column for reinforcing the shaft column along the shaft column,
Two reinforcing middle rails each having a pair of left and right cutouts formed at substantially symmetrical positions with respect to the center in the longitudinal direction are attached to both ends of the reinforcing shaft column, and the longitudinal central portion is respectively located in the upper center. Reinforcing middle beam attaching step provided in two steps above and below substantially parallel to the shaft rail by attaching to the lower end portion of the column and the upper end portion of the lower middle column;
Reinforcing middle column attaching step for attaching the reinforcing middle columns formed with a notch in the middle in the longitudinal direction to the longitudinal middle portions of the upper and lower reinforcing middle bars so that both ends thereof are substantially parallel to the axial column; ,
A pair of the load-bearing braces pass through the cutout portions of the upper and lower reinforcing intermediate bars and intersect each other at the cutout portions of the reinforcing intermediate pillars, and both ends thereof are connected to the shaft column and the A load-bearing brace mounting step that is fixed by a fixing tool at a corner portion that is formed by a shaft rail and is at a relative angular position;
A reinforcing member attaching step for attaching the notch portion of the reinforcing middle beam and a middle beam reinforcing member for closing and reinforcing the notched portion of the reinforcing middle column, and the middle column reinforcing member while avoiding the load-bearing brace, and A non-bearing wall bearing wall construction method characterized by comprising

Inside the shaft column and the shaft rail arranged in the frame shape, the middle column arranged substantially in parallel with the shaft column at the center in the longitudinal direction of the shaft rail is cut off at the middle in the longitudinal direction. As a result, the reinforcing middle beam, which is divided into an upper middle pillar and a lower middle pillar, and a pair of left and right cutouts are formed at substantially symmetrical positions across the center in the longitudinal direction, has both ends attached to the shaft pillar and is elongated. By attaching the central portion in the direction to the lower end portion of the upper middle column and the upper end portion of the lower middle column, respectively, it is arranged in two upper and lower stages substantially parallel to the shaft rail, and a notch portion is formed in the longitudinal central portion. The formed reinforcing middle pillars are arranged substantially in parallel with the axial pillars by attaching both ends thereof to the longitudinal center part of the upper and lower reinforcing middle bars, and a pair of load-bearing braces are provided on the upper and lower reinforcing bars. It passes through the notch of the middle rail and passes through the notch of the reinforcing middle column. And both ends are fixed to a corner formed by the shaft column and the shaft rail at a relative angular position by a fixture, the notch portion of the reinforcing middle beam, and the reinforcement A structure of a load bearing wall, wherein a middle beam reinforcing member for closing and reinforcing the notch of the middle column and a middle column reinforcing member are disposed so as to avoid the load bearing brace.

Inside the shaft column and the shaft rail arranged in the frame shape, the middle column arranged substantially in parallel with the shaft column at the center in the longitudinal direction of the shaft rail is cut off at the middle in the longitudinal direction. A pair of left and right cutouts at substantially symmetrical positions across the center in the longitudinal direction, and a reinforcing axial column for reinforcing the axial column is arranged along the axial column. The reinforcing intermediate beam formed with the portion is attached to both ends of the reinforcing shaft column, and the longitudinal center portion is attached to the lower end portion of the upper middle column and the upper end portion of the lower middle column, respectively. Reinforcing middle pillars, which are arranged in two upper and lower stages substantially parallel to the shaft rail, and in which a notch portion is formed in the longitudinal center portion, are attached to both longitudinal ends of the reinforcing middle rail in the longitudinal direction. And a pair of load-bearing braces arranged on the upper and lower sides. Passing through the notch portion of the strong middle beam and intersecting each other at the notch portion of the reinforcing middle column, both end portions are formed by the shaft column and the shaft beam and are in relative angular positions. A middle beam reinforcing member, which is fixed to a corner by a fixing tool, and closes and reinforces the notch portion of the reinforcing middle beam, and the notch portion of the reinforcing middle column, and the middle column reinforcing member includes the strength brace. A structure of a load-bearing wall, characterized in that it is arranged by avoiding each.