JP3831870B2

JP3831870B2 - Extension construction method of hut assembly

Info

Publication number: JP3831870B2
Application number: JP2002188907A
Authority: JP
Inventors: 祐史上田; 幸伸小出; 和夫中原; 博上谷; 寿弘堀江
Original assignee: Sekisui House Ltd
Current assignee: Sekisui House Ltd
Priority date: 2002-06-28
Filing date: 2002-06-28
Publication date: 2006-10-11
Anticipated expiration: 2022-06-28
Also published as: JP2004027744A

Description

【０００１】
【発明の属する技術分野】
本発明は、寄棟造りの住宅の増築時の増築工事に関し、既存住宅の小屋組を全面解体することなく増築部の小屋組を施工する小屋組の増築施工法に関する。
【０００２】
【従来の技術】
寄棟造りの既存住宅の桁面の一部分に増築すると、増築後では増築前と比べて、棟高さが高くなったり棟方向が変わったりして、小屋組架構全体が変わることが多い(図１参照)。
【０００３】
このような場合には、新しい小屋組に対応させて、既存小屋組の既存部材に別の部材を継ぎ足すか、既存部材を撤去して新規部材に交換するかして、既存小屋組の架構を変更する必要が生じる。このため、従来は、既存小屋組を全面的に解体して、新しい小屋組に施工し直していた。
【０００４】
【発明が解決しようとする課題】
しかしながら、既存小屋組を全面的に解体して、新しい小屋組に施工し直すので、多くの時間と労力を要し、施工期間が長くなるだけでなく、作業性が悪いという問題点があった。
【０００５】
また、小屋組の各構成部材が鋼等の金属からなる場合には、溶接により既存部材に別の部材を継ぎ足すことは可能であるが、作業性が悪いだけでなく、顧客が既存の住宅内で従来通り生活を営むことを考慮すると、十分な安全性を確保することが困難であるという問題点があった。
【０００６】
更に、既存小屋組を全面解体することにより、多量の産業廃棄物が発生し、これを運搬して処理するために、費用がかかるという問題点があった。
【０００７】
更にまた、前述のように、多くの場合は、増築工事中であっても顧客が既存の住宅内で生活を営むため、短期間で増築工事を終了することが望ましいが、施工期間の長期化に伴い顧客に不便を強いる期間が長くなり、顧客の負担が大きくなるという問題点があった。
【０００８】
本発明は、上記課題に鑑みてなされたものであり、寄棟造りの既存住宅の桁面の中間部に増築部の棟高さを既存住宅の棟高さより高く増築する際の増築工事において、施工の省力化、コストダウン及び廃棄物の削減を図る小屋組の増築施工法を提供することを目的とする。
【０００９】
【課題を解決するための手段】
前記目的を達成するためになされた本発明の請求項１に記載の小屋組の増築施工法、寄棟造りの既存住宅の桁面の中間部に増築部の棟高さを既存住宅の棟高さより高く増築する際の増築工事における小屋組の施工法であって、既存大棟の中間部下の垂直部材の上端部に設置された頂部母屋受けに設置される頂部母屋受け接続部と該頂部母屋受け接続部の一端側から前記既存隅木梁の立上り角度と略等しい角度で立ち上がる隅木梁接続部とを有する隅木梁設置金具を用い、前記隅木梁接続部に前記新規隅木梁の一端部を接続し、前記新規隅木梁を前記大棟中間部に設置することにより、既存大棟の中間部から新規大棟の端部に向って隅木梁を設置し、既存大棟の中間部の垂直部材の頂部に設置される平部と、前記垂直部材の上端部に設置された頂部母屋受けに設置される頂部母屋受け接続部と、該母屋受け接続部の一側中央部から既存登り梁の立上り角度と略等しい立上り角度で立り上がる登り梁接続部とを有する登り梁延長金具を用い、前記新規登り梁の一端部を前記登り梁接続部に接続し、前記平部を前記垂直部材の頂部に固定し、前記頂部母屋受け接続部を前記頂部母屋受けに固定することにより、前記新規登り梁の一端部を前記既存登り梁の延長上に設置するとともに、下端部に増築部側の既存登り梁に設置される登り梁束接続金具と上端部に前記新規登り梁に接続する新規登り梁接続部とを有する新規登り梁束を用い、前記登り梁束接続金具を前記既存の登り梁に固定し、前記新規登り梁束接続部を前記新規の登り梁に接続して、前記新規登り梁束を前記新規登り梁と前記増築側の既存登り梁との間に鉛直に立設させることにより、既存大棟の中間部の登り梁を新規大棟の端部に向って延長し、既存小屋組と増築部の小屋組との境界に生じる谷部と増築部側の既存登り梁とが交差する交差部において、該交差部に設置される設置部と、前記交差部近傍の母屋受けに設置された母屋受けに設置される母屋受け接続部と、前記設置部の一側面から前記既存隅木梁の立上り角度と略等しい立上り角度で立ち上がる第１谷木梁設置部と、前記設置部の他側面の前記第１谷木梁接続部の延長上に設置される第２谷木梁接続部とを有する谷木梁設置金具を用い、第１新規谷木梁の端部を前記第１谷木梁接続部に接続し、第２新規谷木梁の端部を前記第２谷木梁接続部に接続し、前記第１新規谷木梁の端部と前記第２新規谷木梁の端部とを前記交差部に略一直線上に設置することにより、前記谷部に谷木梁を設置することを特徴とするものである。
【００１０】
請求項２に記載の小屋組の増築施工法は、請求項１に記載の小屋組の増築施工法において、前記谷木梁設置金具の設置部に該設置部の一側面から前記既存登り梁の立上り角度と略等しい立上り角度で立ち上がる登り梁接続部を設置し、該登り梁接続部に新規登り梁の一端部を接続することにより、前記交差部から前記新規隅木梁に向って登り梁を設置することを特徴とするものである。
【００１１】
請求項３に記載の小屋組の増築施工法は、請求項１又は請求項２に記載の小屋組の増築施工法において、小屋組のトラスの一端側から斜め下方にトラス軒先部が延設された住宅の桁側面への増築工事で、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加する軒先梁設置工法であって、既存住宅の前記軒先梁を追加する桁側面のトラス軒先部の軒先側部を切除し、相隣接するトラスの軒先側の端部に、突設された軒先梁接続部を相対向させて軒先梁設置金具をそれぞれ配設し、相対向するこれら軒先梁接続部に、軒先梁の両端部を接続することを特徴とするものである。
【００１２】
請求項４に記載の小屋組の増築施工法は、請求項１又は請求項２に記載の小屋組の増築施工法において、小屋組のトラスの一端側から斜め下方にトラス軒先部が延設された住宅の桁側面への増築工事で、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加する軒先梁設置工法であって、既存住宅の前記軒先梁を追加する桁側面のトラス軒先部を切除し、相隣接するトラスの軒先側の端部に、前記トラスのウエブを跨ぐウエブ跨ぎ部と、該ウエブ跨ぎ部から直角方向に突設された軒先梁接続部とを有する軒先梁接続金具を前記軒先梁接続部を相対向させてそれぞれ配設し、相対向するこれら軒先梁接続部に、軒先梁の両端部を接続することを特徴とするものである。
【００１３】
【発明の実施の形態】
第１に、図１に示すように、既存小屋組と増築部の新規小屋組との境界に新規隅木梁１００を設置する。この新規隅木梁１００の設置は、図２に示すように、既存大棟の中間部下の垂直部材である既存登り梁真束１の上端部２に設けられた頂部母屋受け３に隅木梁設置金具１０１を用いて新規隅木梁１００の一端部１０２を接続することにより行う。
【００１４】
既存登り梁真束１は、図２に示すように、２本のＣ型鋼４をボルト締めで締結し、開口部が互い外側を向き、かつ、所望の間隔の隙間を確保したものであって、上端部２に登り梁接続部５が、下端部に大梁接続部がそれぞれ設けられている(図１４参照)。
【００１５】
頂部母屋受け３は、図３に示すように、断面略Ｌ字形の金具であって、母屋を受ける受け部６には母屋を頂部母屋受け３に固定するための貫通孔６ａが穿設されている。
【００１６】
新規隅木梁１００は、図３又は図４に示すように、既存登り梁真束１と同様の構成であって、両端部に一対の貫通孔１００ａが穿設されている。
【００１７】
隅木梁設置金具１０１は、図４に示すように、貫通孔１０３ａが穿設された平部１０３と、該平部１０３の一縁辺から略直角上向きに立ち上がる立上り部１０４と、該立上り部１０４の裏側面から既存隅木梁の立上り角度θと略等しい立上り角度（以下、「立上り角度θ」という。）で立上る隅木梁接続部１０５と、平部１０３の一縁辺と略直交する縁辺から上向きに立上る頂部母屋受け接続部１０６とを有している。なお、既存隅木梁は、図示はしないが、既存大棟の端部から既存軒先の出隅に向って４５°の方向へ持ち出すように設けられている(図１参照)。
【００１８】
平部１０３は、図５に示すように、略長方形であって、貫通孔１０３ａは既存登り梁真束１の頂部７の貫通孔７ａと略一致する位置に穿設されている。
【００１９】
立上り部１０４は、前述のように、平部１０３の一縁辺から略直角上向きに立ち上がり、平部１０３側面に頂部母屋受け接続部１０６の縁辺を固着させて、隅木梁設置金具１０１の補強を図っている。
【００２０】
隅木梁接続部１０５は、その長さ等は特に限定されるものではないが、その厚さは新規隅木梁１００の２本のＣ型鋼４の隙間と略等しくしている。また、２個の貫通孔１０６ａはその中心を結ぶ線が水平方向に対して立上り角度θをなし、その間隔が新規隅木梁１００の一端部１０２の一対の貫通孔１００ａと略等しい間隔となる位置に穿設されている。更に、平面視では、図５に示すように、立上り部１０４と略１３５°の角度をなして立上り部１０４の平部１０３の裏側面の頂部母屋受け接続部１０６の方に固着されている。これにより、図６に示すように、頂部母屋受け接続部１０６を頂部母屋受け３の受け部６に固定すると、隅木梁接続部１０５が既存大棟方向に対して４５°の軸線上に位置することとなる。
【００２１】
頂部母屋受け接続部１０６は、図５に示すように、その長さは特に限定されないが、その高さは頂部母屋受け３の受け部６の高さと略等しくしている。また、貫通孔１０６ａは、頂部母屋受け接続部１０６を頂部母屋受け３の受け部６にあてがったときに受け部６の貫通孔６ａと略一致する高さ位置とし、かつ、隅木梁接続部１０５が既存登り梁真束１の頂部７の中心から既存大棟方向に対して４５°の軸線上に位置するように穿設されている（図６参照）。
【００２２】
以下、新規隅木梁１００の一端部１０２の既存登り梁真束１の上端部２への接続について説明する。まず、図４に示すように、新規隅木梁１００を構成する２本のＣ型鋼４の間に隅木梁設置金具１０１の隅木梁接続部１０５を挿入して、新規隅木梁１００の一端部１０２の貫通孔１００ａと隅木梁接続部１０５の貫通孔１０５ａとをボルトナットで構成される締結具５０で締結することにより、新規隅木梁１００の一端部１０２を隅木梁設置金具１０１に接続する。
【００２３】
そして、図５に示すように、既存登り梁真束１の頂部７に隅木梁設置金具１０１の平部１０３を載置し、既存登り梁真束１の頂部７の貫通孔７ａと平部１０３の貫通孔１０３ａとを締結具５０で締結し、また、増築部側の頂部母屋受け３の受け部６に隅木梁設置金具１０１の頂部母屋受け接続部１０６をあてがい、増築部側の頂部母屋受け３の受け部６の貫通孔６ａと頂部母屋受け接続部１０６の貫通孔１０６ａとを締結具５０で締結し、隅木梁設置金具１０１を既存登り梁真束１の上端部２に固定することにより、図３及び図６に示すように、新規隅木梁１００の一端部１０２を既存登り梁真束１の上端部２に接続する。
【００２４】
以上により、図２に示すように、新規隅木梁１００の一端部１０２は既存登り梁真束１の上端部２に接続されて、既存小屋組と増築部の新規小屋組との境界に新規隅木梁１００が設置される（図１参照）。
【００２５】
なお、本実施の形態では、施工現場において新規隅木梁１００の一端部１０２と隅木梁設置金具１０１の隅木梁接続部１０５とをボルト締めで接続したが、これに限定されるものではなく、予め工場において新規隅木梁１００の一端部１０２と隅木梁設置金具１０１の隅木梁接続部１０５とを溶接で接続しておいてもよい。これにより、施工現場での作業を軽減することができる。
【００２６】
また、本実施の形態では、既存の小屋組をトラス小屋組としているが、図７に示すように、既存の小屋組を和小屋組とした同様であって、隅木梁設置金具１０１を用いて新規隅木梁１００の一端部１０２を既存登り梁真束１の上端部２に接続する。
【００２７】
第２に、図１に示すように、既存大棟の中間部に設置された既存登り梁８を増築部側の新規大棟の端部に向って延長する。この既存登り梁８の延長は、図８に示すように、既存大棟の中間部下の垂直部材である既存登り梁真束９の上端部１０に新規登り梁２００の一端部２０１を登り梁延長金具２０２を用いて固定するとともに、増築部側の既存登り梁１１と新規登り梁２００との間に新規登り梁束２０３を登り梁束接続金具２０４を用いて設置することにより行う。
【００２８】
既存登り梁８、及び増築部側の既存登り梁１１は、図８に示すように、２本のＣ型鋼４をボルト締めで締結し、開口部が互い外側を向き、かつ、所望の間隔の隙間を確保したものであって、既存大棟から既存大梁の端部に向って斜め下方に下るように既存登り梁真束９及び既存登り梁束１２に支持されている。
【００２９】
また、既存登り梁真束９の上端部１０には断面略Ｌ字型の頂部母屋受け１３が、既存登り梁８及び増築部側の既存登り梁１１の上面には断面略Ｌ字形の母屋受け１４がそれぞれ設けられている。また、母屋を受ける受け部１５、１６には母屋を固定するための貫通孔１５ａ、１６ａがそれぞれ穿設されている（図１５又は図１７参照）。
【００３０】
新規登り梁２００は、図８に示すように、既存登り梁８及び増築部側の既存登り梁１１と同様の構成であって、所定の間隔をおいて登り梁延長金具２０２や新規登り梁束２０３に接続するための貫通孔２００ａが穿設されている（図１７参照）。
【００３１】
登り梁延長金具２０２は、図９に示すように、両端部に貫通孔２０５ａが穿設された略長方形の頂部母屋受け接続部２０５と、両端部に貫通孔２０６ａが穿設された略長方形の平部２０６と、頂部母屋受け接続部２０５の背側面中央部から水平方向に対して図８に示す大梁と既存登り梁８とがなす角度αと略等しい立上り角度（以下、「立上り角度α」という。）で立ち上がり、頂部母屋受け接続部２０５と対向する端部に２個の貫通孔２０７ａが穿設された登り梁接続部２０７と、頂部母屋受け接続部２０５と平部２０６とを繋ぐ補強部２０８とを有している。
【００３２】
頂部母屋受け接続部２０５は、図１０又は図１１に示すように、その長さは頂部母屋受け１３の受け部１５の長さと略等しく、貫通孔２０５ａは、頂部母屋受け接続部２０５を頂部母屋受け１３の受け部１５にあてがったときに頂部母屋受け１３の貫通孔１５ａと略一致する位置に穿設されている。
【００３３】
平部２０６は、その長さは頂部母屋受け接続部２０５の長さと略等しく、貫通孔２０６ａは、頂部母屋受け接続部２０５を頂部母屋受け１３の受け部１５にあてがったときに既存登り梁真束９の頂部１７に穿設された貫通孔１７ａと略一致する位置に穿設されている。
【００３４】
登り梁接続部２０７は、その長さは特に限定されないが、その厚さは新規登り梁２００の２本のＣ型鋼４の隙間と略等しく、２個の貫通孔２０７ａは、その中心を結ぶ線が水平方向に対して立上り角度αをなし、その間隔が新規登り梁２００の貫通孔２００ａと略等しい間隔となる位置に穿設されている。これにより、登り梁延長金具２０２を既存登り梁真束９に固定すると、登り梁接続部２０７は既存登り梁８の延長上に位置することとなる。
【００３５】
補強部２０８は、その一端部が頂部母屋受け接続部２０５の端縁に、その下端部が平部２０６の端縁にそれぞれ固着されることにより、頂部母屋受け接続部２０５と平部２０６との間に隙間２０９を確保しながら頂部母屋受け接続部２０５と平部２０６とを繋いでいる。
【００３６】
また、新規登り梁束２０３は、図１２に示すように、既存登り梁束１２と同様の構成であって、上端部には貫通孔２１０ａが穿設された新規登り梁接続部２１０が、下端部には登り梁束接続金具２０４がそれぞれ設けられている。新規登り梁接続部２１０の２個の貫通孔２１０ａは、その中心を結ぶ線が水平方向に対して立上り角度αをなし、その間隔が新規登り梁２００の貫通孔２００ａと略等しい間隔となる位置に穿設されている（図１７参照）。
【００３７】
登り梁束接続金具２０４は、図１２に示すように、略長方形の設置部２１１と、該設置部２１１の上面に設置部２１１の長手方向と略平行かつ幅方向の中央部に所定の立上り角度βをなして設置された登り梁束接続部２１２と、設置部２１１の下面に設置部２１１の長手方向と略平行かつ幅方向の中央部に略９０°をなして突設され、設置部２１１と対向する端部に貫通孔２１３ａが穿設された既存登り梁接続部２１３と、設置部２１１の一端から略９０°をなして立ち上がり、その両端部に貫通孔２１４ａが穿設された母屋受け接続部２１４と、設置部２１１の両側縁から略９０°をなして立ち上がり、一端部に母屋受け接続部２１４の側縁をそれぞれ固着した補強部２１５とを有するものである。
【００３８】
設置部２１１は、図１３又は図１４に示すように、増築部側の既存登り梁１１の上面に設置するものであり、その幅は母屋受け１４の受け部１６の幅と略等しく、その長さは母屋受け１４の設置間隔より短い。また、母屋受け接続部２１４と対向する端部の下面に母屋受け１４の厚さと略等しい厚さの不陸調節部２１６を設けている。
【００３９】
登り梁束接続部２１２は、新規登り梁束２０３の下端部を登り梁束接続金具２０４に接続するためのものであり、その一側面中央部に登り梁束接続部２１２を補強するための補強リブ２１７を設けている。登り梁束接続部２１２の長さ方向の位置は、登り梁束接続金具２０４を増築部側の既存登り梁１１に設置したときに新規登り梁束２０３が既存登り梁束１２の真上となる位置とする。また、立上り角度βを９０°に図８に示す既存登り梁８の立上り角度αを足した角度として、登り梁束接続金具２０４を増築部側の既存登り梁１１に設置したときに、登り梁束接続部２１２を増築部側の既存登り梁１１に鉛直に立設させる。
【００４０】
なお、本実施の形態では、新規登り梁束２０３と登り梁束接続部２１２との接続は溶接により行うが、これに限定されるものではなく、図示はしないが、新規登り梁束２０３の下端部及び登り梁束接続部２１２の上端部に貫通孔をそれぞれ穿設して、ボルト締めで新規登り梁束２０３を登り梁束接続部２１２に接続することにより行ってもよい。
【００４１】
既存登り梁接続部２１３は、登り梁束接続金具２０４を増築部側の既存登り梁１１に設置するためのものであり、その厚さは増築部側の既存登り梁１１の２本のＣ型鋼４の隙間と略等しくし、その長さはＣ型鋼４のウェブの長さより長くしている。
【００４２】
母屋受け接続部２１４は、母屋受け１４の受け部１６に固定されて登り梁束接続金具２０４を増築部側の既存登り梁１１に固定するものであり、その幅は母屋受け１４の受け部１６の幅と略等しく、その高さは母屋受け１４の受け部１６の高さと略等しくしている。貫通孔２１４ａは、設置部２１１を増築部側の既存登り梁１１の上面に置いたときに、母屋受け１４の受け部１６の貫通孔１６ａと略一致する位置に穿設されている(図１７参照)。
【００４３】
補強部２１５は、図１２に示すように、登り梁束接続金具２０４の補強を図るものであり、設置部２１１の母屋受け接続部２１４の方の下隅角部に水がたまらないように、該下隅角部と接する縁辺の一部分を切り欠いて水抜き部２１８を設けている。
【００４４】
以下、新規登り梁２００の端部２０１の既存登り梁真束９の上端部１０への接続について説明する。まず、図１５に示すように、新規登り梁２００を構成する２本のＣ型鋼４の間に登り梁延長金具２０２の登り梁接続部２０７を挿入して、新規登り梁２００の一端部２０１の貫通孔２００ａと登り梁延長金具２０２の登り梁接続部２０７の貫通孔２０７ａとを締結具（図示せず）で締結することにより、新規登り梁２００の一端部２０１を登り梁延長金具２０２に接続する。
【００４５】
そして、増築部側の頂部母屋受け１３を登り梁延長金具２０２の隙間２０９に嵌め入れ、増築部側の頂部母屋受け１３の受け部１５に登り梁延長金具２０２の頂部母屋受け接続部２０５をあてがい、受け部１５の貫通孔１５ａと頂部母屋受け接続部２０５の貫通孔２０５ａとを締結具５０で締結し、既存登り梁真束９の頂部１７に登り梁延長金具２０２の平部２０６を載置し、頂部１７の貫通孔１７ａと平部２０６の貫通孔２０６ａとを締結具５０で締結することにより、登り梁延長金具２０２を増築部側の頂部母屋受け１３及び既存登り梁真束９の頂部１７に固定する。これにより、図１０及び図１１に示すように、新規登り梁２００の一端部２０１が既存登り梁真束９の上端部１０に接続され、既存登り梁８の延長上に位置することとなる。
【００４６】
次に、新規登り梁束２０３の増築部側の既存登り梁１１への設置について説明する。まず、図１６に示すように、増築部側の既存登り梁１１の２本のＣ型鋼４の間に登り梁束接続金具２０４の既存登り梁接続部２１３を挿入し、登り梁束接続金具２０４の設置部２１１を増築部側の既存登り梁１１の上面に載置し、増築部側の既存登り梁１１の下面から突出した既存登り梁接続部２１３の突出部分の両側に一方に貫通孔２１９ａが穿設された２枚の折れ形のプレート２１９をそれぞれあてがい、各プレート２１９の貫通孔２１９ａと既存登り梁接続部２１３の貫通孔２１３ａとを締結具５０で締結することにより登り梁束接続金具２０４を増築部側の既存登り梁１１の上面に設置する。
【００４７】
また、図１７に示すように、登り梁束接続金具２０４の母屋受け接続部２１４を既存登り梁束１２近傍の母屋受け１４の受け部１６にあてがい、母屋受け接続部２１４の貫通孔２１４ａと受け部１６の貫通孔１６ａとを締結具５０で締結して母屋受け接続部２１４を母屋受け１４に固定することにより、登り梁束接続金具２０４を増築部側の既存登り梁１１の上面に固定する。これにより、図１３及び図１４に示すように、登り梁束接続金具２０４は、増築部側の既存登り梁１１に固定される。
【００４８】
そして、図１７に示すように、新規登り梁接続部２１０を新規登り梁２００の２本のＣ型鋼４の間に挿入し、新規登り梁２００の貫通孔２００ａと新規登り梁接続部２１０の貫通孔２１０ａとを締結具（図示せず）で締結することにより、新規登り梁接続部２１０を新規登り梁２００に接続する。これにより、図１３に示すように、新規登り梁束２０３は、既存登り梁束１２の真上に鉛直に立設する。
【００４９】
以上により、図８に示すように、新規登り梁束２０３は増築部側の既存登り梁１１と新規登り梁２００との間に鉛直に立設して新規登り梁２００を支持するので、新規登り梁２００が立上り角度αで既存登り梁８の延長上に設置される、即ち、図１に示すように、既存登り梁８が増築部側の新規大棟の端部に向って延長されたこととなる。
【００５０】
なお、図１８に示すように、設計の都合上、新規登り梁束２０３を既存登り梁束１２の真上からずらせて設ける場合には、設置部２１１の他端部に母屋受け接続部２１４が設けられた登り梁束接続金具２２０を用い、該登り梁束接続金具２２０の母屋受け接続部２１４を母屋受け１４に固定することにより、新規登り梁束２０３を増築部側の既存登り梁１１に設置する。
【００５１】
更に、本実施の形態では、新規登り梁束２０３を１本のＣ型鋼４としたが、既存登り梁真束９と同様に２本のＣ型鋼４とすることも可能である。この場合の登り梁束接続金具２３０は、図１９に示すように、設置部２１１の長さは母屋受け１４の設置間隔と略等しく、設置部２１１の両端に母屋受け接続部２１４が設けられている。
【００５２】
登り梁束接続金具２３０と増築部側の既存登り梁１１との接続は、図２０に示すように、２個の母屋受け１４の間に、登り梁束接続金具２３０を嵌め入れ、各母屋受け１４の受け部１６と各母屋受け接続部２１４とを締結具５０で締結することにより行う。なお、新規登り梁束２０３と登り梁束接続金具２３０との接続は、新規登り梁束２０３の下端部及び登り梁束接続部２１２の上端部に貫通孔をそれぞれ穿設して、これらの貫通孔を締結具５０で締結することにより行うが、登り梁束接続金具２０４の増築部側の既存登り梁１１への嵌入角度が限定されるため、登り梁束接続金具２０４を増築部側の既存登り梁１１に固定した後に接続することとする。
【００５３】
更にまた、本発明の実施の形態では、既存住宅の小屋組をトラス小屋組としているが、図２１に示すように、既存の小屋組を和小屋組とした場合においても同様であって、登り梁延長金具２０２を用いて新規登り梁２００の一端部２０１を既存登り梁真束９の上端部１０に接続し、登り梁束接続金具２０４を用いて新規登り梁束２０３を増築部側の既存登り梁１１と新規登り梁２００間に鉛直に立設させる。
【００５４】
第３に、図８に示すように、新規寄棟束２５０を増築部側の既存登り梁１１に鉛直に立設させる。この新規寄棟束２５０の立設は、登り梁束接続金具２０４を用いて増築部側の既存登り梁１１に設置された母屋受け１４に新規寄棟束２５０の下端部を固定することにより行う。
【００５５】
新規寄棟束２５０は、図３に示す既存登り梁真束１と同様の構成であって、開口部が外側を向くように２本のＣ型鋼４をボルト締めで締結したものであって、上端部には頂部母屋受け１３及び梁接続金具２５１が、下端部には登り梁束接続金具２０４がそれぞれ設けられている。
【００５６】
そして、新規寄棟束２５０の梁接続金具２５１に新規隅木梁１００の他端部及び新規登り梁２００の他端部を接続する。この接続は、前述と同様の手順により行い、即ち、新規隅木梁１００を構成する２本のＣ型鋼４の間に梁接続金具２５１の隅木梁接続部を挿入して、新規隅木梁１００の他端部と梁接続金具２５１とをボルト締めすることにより、新規隅木梁１００の他端部を梁接続金具２５１に接続するとともに、新規登り梁２００を構成する２本のＣ型鋼４の間に梁接続金具２５１の登り梁接続部を挿入して、新規登り梁２００と梁接続金具２５１とをボルト締めすることにより行う（図８参照）。
【００５７】
以上により、図１に示すように、新規隅木梁１００は既存寄棟束と新規寄棟束２５０との間に設置され、新規登り梁２００は既存登り梁真束９と新規寄棟束２５０との間に設置されて、既存隅木梁、及び既存登り梁８は増築後の小屋組に対応して増築部側へそれぞれ延長される。
【００５８】
第３に、図１又は図２２に示すように、既存小屋組と増築部の新規小屋組との境界に発生する谷部に新規谷木梁３００を設置する。この新規谷木梁３００の設置は、図２３に示すように、谷部と増築部側の既存登り梁１８とが交差する交差部３０１に谷木梁設置金具３０２を固定し、第１新規谷木梁３０３の一端部３０４を谷木梁設置金具３０２の第１谷木梁接続部３０５に接続し、第２新規谷木梁３０６の一端部３０７を谷木梁設置金具３０２の第２谷木梁接続部３０８に接続することにより行う。
【００５９】
増築部側の既存登り梁１８は、図２２に示すように、図８に示す既存登り梁８、及び増築部側の既存登り梁１１と同様の構成である。
【００６０】
新規谷木梁３００は、図１に示すように、第１新規谷木梁３０３と第２新規谷木梁３０６とを有しており、図３に示す新規隅木梁１００と同様の構成であって、それぞれの両端部に一対の貫通孔３０３ａ、３０６ａが穿設されている（図２７参照）。
【００６１】
谷木梁設置金具３０２は、図２４又は図２５に示すように、断面略Ｈ形の設置部３０９と、該設置部３０９のウェブプレート３１０下面の幅方向中央部に突設され、該ウェブプレート３１０と対向する端部に貫通孔３１１ａが穿設された登り梁接続部３１１と、設置部３０９のウェブプレート３１０の一端部から略９０°をなして立ち上がり、その両端部に貫通孔３１２ａが穿設された母屋受け接続部３１２と、設置部３０９の一方のフランジプレート３１３Ｆの外側面から図３に示す既存隅木梁の立上り角度θと略等しい立上り角度で立ち上がる第１谷木梁接続部３０５と、設置部３０９の他方のフランジプレート３１３Ｓの第１谷木梁接続部３０５の延長上に設置される第２谷木梁接続部３０８とを有している。
【００６２】
設置部３０９のウェブプレート３１０は、その長さは母屋受け１９の設置間隔より短く、その幅は母屋受け１９の受け部２０の幅と略等しい。また、その他端部の下面に母屋受け１９の厚さと略等しい厚さの不陸調節部３１４を設けている。また、設置部３０９のフランジプレート３１３Ｆ、３１３Ｓは、ウェブプレート３１０の母屋受け接続部３１２の方の下隅角部に水がたまらないように、該下隅角部と接する縁辺の一部分を切り欠いて水抜き部３１５を設けている。
【００６３】
登り梁接続部３１１は、その厚さは増築部側の既存登り梁１８の２本のＣ型鋼４の隙間と略等しくし、その長さはＣ型鋼４のウェブの長さより長くする。
【００６４】
母屋受け接続部３１２は、その長さは母屋受け１９の受け部２０の長さと略等しくし、貫通孔３１２ａは、谷木梁設置金具３０２を増築部側の既存登り梁１８に載置したときに母屋受け１９の受け部２０の貫通孔２０ａと略一致する位置に穿設されている（図２６参照）。なお、母屋受け１９は、図１７に示す母屋受け１４と同様の構成である。
【００６５】
第１谷木梁接続部３０５は、図２３に示すように、その長さ等は特に限定されるものではないが、その厚さは第1新規谷木梁３０３の２本のＣ型鋼４の隙間と略等しくしている。また、平面視では、設置部３０９のフランジプレート３１３Ｆと略４５°の角度をなして固着されている。これにより、設置部３０９を増築部側の既存登り梁１８に設置すると、第１谷木梁接続部３０５が増築部側の既存登り梁１８に対して４５°の軸線上に位置することとなる。更に、２個の貫通孔３０５ａは、図２５に示すように、その中心を結ぶ線が水平方向に対して立上り角度θをなし、その間隔が第1新規谷木梁３０３の一対の貫通孔３０３ａと略等しい間隔となる位置に穿設されている（図２７参照）。
【００６６】
第２谷木梁接続部３０８は、図２５に示すように、第１谷木梁接続部３０５に同様の構成であって、２個の貫通孔３０８ａは、その中心を結ぶ線が第１谷木梁接続部３０５の貫通孔３０５ａの中心を結ぶ線の延長上に位置するように穿設されている。
【００６７】
以下、新規谷木梁３００の谷部への設置について説明する。まず、図２５に示すように、増築部側の既存登り梁１８の２本のＣ型鋼４の間に谷木梁設置金具３０２の登り梁接続部３１１を挿入し、谷木梁設置金具３０２の設置部３０９を増築部側の既存登り梁１８の上面に載置し、増築部側の既存登り梁１８の下面から突出した登り梁接続部３１１の突出部分の両側に一方に貫通孔３１６ａが穿設された２枚の折れ形プレート３１６をそれぞれあてがい、各プレート３１６の貫通孔３１６ａと登り梁接続部３１１の貫通孔３１１ａとを締結具５０で締結することにより谷木梁設置金具３０２を増築部側の既存登り梁１８の上面に設置する。
【００６８】
また、図２６に示すように、谷木梁設置金具３０２の母屋受け接続部３１２を母屋受け１９の受け部２０にあてがい、母屋受け接続部３１２の貫通孔３１２ａと母屋受け１９の受け部２０の貫通孔２０ａとを締結具５０で締結して母屋受け接続部３１２を母屋受け１９に固定することにより、谷木梁設置金具３０２を増築部側の既存登り梁１８の上面に固定する。
【００６９】
次に、図２７に示すように、第１新規谷木梁３０３を構成する２本のＣ型鋼４の隙間に谷木梁設置金具３０２の第１谷木梁接続部３０５を挿入して、第１新規谷木梁３０３の一端部３０４の貫通孔３０３ａと谷木梁設置金具３０２の第１谷木梁接続部３０５の貫通孔３０５ａとを締結具５０で締結することにより、第１新規谷木梁３０３の一端部３０４を谷木梁設置金具３０２に接続する。これにより、図２８に示すように、第１新規谷木梁３０３は交差部３０１から新規隅木梁１００の端部に向って設置される（図１参照）。
【００７０】
同様にして、図２７に示すように、第１新規谷木梁３０３と同様に、第２新規谷木梁３０６を構成する２本のＣ型鋼４の隙間に谷木梁設置金具３０２の第２谷木梁接続部３０８を挿入して、第２新規谷木梁３０６の一端部３０７の貫通孔３０６ａと谷木梁設置金具３０２の第２谷木梁接続部３０８の貫通孔３０８ａとを締結具５０で締結することにより、第２新規谷木梁３０６の一端部３０７を谷木梁設置金具３０２に接続する。これにより、図２９に示すように、第２新規谷木梁３０６は交差部３０１から軒先の入隅に向って設置される。従って、新規谷木梁３００は谷部の交差部３０１に設置されることとなる。
【００７１】
次に、図３に示すように、新規隅木梁１００を接続する既存登り梁真束１に設置した梁接続金具３１７の谷木梁接続部３１８に第１新規谷木梁３０３の他端部３１９を接続する。この接続は、前述のように、第１新規谷木梁３０３の２本のＣ型鋼４の隙間に梁接続金具３１７の谷木梁接続部３１８を挿入し、第１新規谷木梁３０３の他端部３１９と梁接続金具３１７の谷木梁接続部３１８とを締結具５０で締結することにより行う。
【００７２】
以上により、図１に示すように、新規谷木梁３００は谷部に設置されることとなる。
【００７３】
なお、本実施の形態では、設置部３０９の一端部に母屋受け接続部３１２を設けているが、図３０に示すように、設計上の都合によっては、設置部３０９の他端部に母屋受け接続部３１２が設けられた谷木梁設置金具３２０を用いる。
【００７４】
また、本実施の形態では、既存の小屋組をトラス小屋組としているが、図３１に示すように、既存の小屋組を和小屋組とした場合においても同様であって、谷木梁設置金具３０２や梁接続金具３１７を用いて第１新規谷木梁３０３及び第２新規谷木梁３０６を谷部に設置する。
【００７５】
更に、設計上必要がある場合には、図３２に示すように、交差部３０１から新規隅木梁１００に向って既存大棟と略平行に新規登り梁３５０を設置する。この新規登り梁３５０の設置は、図３３に示す谷木梁接続金具３５１を用いて行う。なお、新規登り梁３５０は、図２２に示す増築部側の既存登り梁１８と同様の構成である。
【００７６】
谷木梁設置金具３５１は、図３３に示すように、図２４に示す谷木梁設置金具３０２と同様の構成であって、設置部３０９の第１谷木梁接続部３０５側のフランジプレート３１３Ｆの外側面に、該外側面から増築部側の既存登り梁１８の立上り角度α（図２２参照）と略等しい立上り角度で立ち上がる新規登り梁接続部３５２を有している。
【００７７】
新規登り梁接続部３５２は、図３３又は図３４に示すように、第１谷木梁接続部３０５と及び第２谷木梁接続部３０８と同様の構成であって、平面視では、設置部３０９のフランジプレート３１３Ｆと略９０°の角度をなして固着されている。これにより、設置部３０９を増築部側の既存登り梁１８に設置すると、新規登り梁接続部３５２が増築部側の既存登り梁１８に対して略９０°をなすこととなる。
【００７８】
新規登り梁３５０の交差部３０１への接続は、まず、前述と同様の手順で谷木梁設置金具３０２を増築部側の既存登り梁１８に固定し、第１新規谷木梁３０３及び第２新規谷木梁３０６と同様の手順により新規登り梁３５０の一端部３５３を谷木梁設置金具３０２の新規登り梁接続部３５２にボルト締めで接続することにより行う（図２７参照）。これにより、図３４及び図３５に示すように、新規登り梁３５０は交差部３０１から新規隅木梁１００に向って設置される（図３２参照）。
【００７９】
次に、図示はしないが、新規登り梁３５０の他端部を新規隅木梁１００の所定位置に設置された梁接続金具にボルト締めで接続することにより、新規登り梁３５０の他端部を新規隅木梁１００に接続する。これにより、図３２に示すように、新規登り梁３５０は、新規隅木梁１００と新規谷木梁３００との間に既存大棟と略平行に設置される。
【００８０】
第４に、図３６に示すように、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加する。この軒先梁の設置の第１の実施の形態は、既存住宅の桁側面の軒先に沿って、既存のトラス１０００の両側方に軒先梁１００１を設置し、且つ、増築部側に該軒先梁１００１と略直交する方向へ直交梁１００２を設置する必要がある場合の軒先梁設置工法であって、図３７に示す手順で、トラス軒先部１００３に前処理を施し、図４０に示すような、ウエブ跨ぎ部４００と、軒先梁接続部４０１と、直交梁接続部４０２と、底部４０３を有する軒先梁設置金具４０４を、相隣接するトラス１０００の軒先側の端部に、軒先梁接続部４０１を相対向させてそれぞれ配設し、相対向する軒先梁接続部４０１に、軒先梁１００１の両端部を接続することにより行うものである。以下、更に詳細に説明する。
【００８１】
軒先梁設置金具４０４をトラス１０００の軒先側の端部に設置する際には、トラス軒先部１００３、及びトラス１０００の軒先側の端部に設けられたプレート１００４が邪魔となるため、それらを切除する前処理工程が必要となる。この前処理工程の手順を示すのが図３７であり、各手順ごとの作業後の状態を表すのが図３８、及び図３９である。
【００８２】
手順１では、トラス軒先部１００３を切除している。これは、トラス軒先部１００３を適宜に短くしておくことにより、後の作業を行い易くするためである。ここで、図３８（ａ)は、この手順の作業前の状態を、図３８（ｂ）は作業後の状態を表している。尚、切断に用いる工具としては、例えばレシプロソー（不図示）を用いることができ、後述する切断作業についても同様である。
【００８３】
手順２では、トラス１０００の軒先側の端部に、軒先に面して設けられている断面略逆Ｌ字型のプレート１００４を取り除くために、該プレート１００４とトラス１０００との接合面に沿うように、トラス軒先部１００３と共に、鉛直方向に切断している。このとき、プレート１００４とトラス１０００との溶接部を避け、プレート１００４とトラス１０００との接合面より若干内側で切断すると切断し易い。ここで、図３８（ｃ）は、この手順の作業後の状態を表している。
【００８４】
手順３では、トラス軒先部１００３を、トラス１０００のＣ型チャンネル１００５先端部より若干軒先側において、トラス１０００のウエブ１００６に達するまで切断している。これは、軒先梁設置金具４０４を設置するのに邪魔となる部分を除去するためである。ここで、図３８（ｄ）は、この手順の作業後の状態を表している。
【００８５】
手順４では、プレート１００４の下部を軒先側から水平方向に切断することにより、プレート１００４をトラス１０００から切り離している。ここで、図３９（ａ）は、この手順の作業後の状態を表している。
【００８６】
手順５では、例えば、サンダー(不図示)等の工具を用いて研磨することにより、手順４においてトラス１０００の下部に残ったプレート１００４の残片を取り除いている。これにより、軒先梁設置金具４０４の該部位への納まりが良くなる、という利点がある。ここで、図３９（ｂ）は、この手順の作業後の状態を表している。
【００８７】
手順６では、軒先側からトラス１０００のウエブ１００６の傾斜に沿って、手順３において切断した位置まで、トラス１０００とトラス軒先部１００３との接合面を切断し、トラス軒先部１００３の軒先側部を除去している。ここで、図３９（ｃ）は、この手順の作業後の状態を表している。
【００８８】
図４０に示す軒先梁設置金具４０４の底部４０３から鉛直方向に立ちあがる、左右１対のウエブ跨ぎ部４００は、トラス１０００のウエブ１００６の厚さよりも若干広い間隔をおいて略平行に配置されている。軒先梁設置金具４０４の設置に際しては、図４１及び図４２に示すように、ウエブ跨ぎ部４００が、前述のような前処理を施したトラス１０００のウエブ１００６の軒先側の端部を跨ぐように軒先梁設置金具４０４をあてがい、トラス１０００のウエブ１００６の軒先側の端部が直交梁接続部４０２に達するまで軒先梁設置金具４０４を押し込むと共に、ウエブ跨ぎ部４００に設けた貫通孔４０５、及び底部４０３に設けた貫通孔４０６において、ボルト締めでトラス１０００、及び軸組１００７に固定している。
【００８９】
軒先梁設置金具４０４の両側部に突設された軒先梁接続部４０１は、ウエブ跨ぎ部４００、及び底部４０３の双方と略９０°の角度をなしており、図４３に示すように、該軒先梁接続部４０１に、Ｈ型鋼である軒先梁１００１のウエブ１００８を当接させ、軒先梁接続部４０１に設けられた貫通孔４０７においてボルト締めで固定することにより、軒先梁１００１を軒先に沿って設置している。
【００９０】
直交梁接続部４０２は、ウエブ跨ぎ部４００、及び底部４０３の双方と略９０°の角度をなして設けられ、軒先側面が平坦面に形成されている。これにより、軒先梁設置金具４０４を設置したときに、該直交梁接続部４０２の平坦面が軒先に面し、図４２、及び図４３に示すように、この平坦面に、Ｈ型鋼である直交梁１００２の一端部を、接合板１００９を介して接合させ、直交梁接続部４０２に設けられた貫通孔４０８においてボルト締めで固定することにより、直交梁１００２を容易に設置することができる。
【００９１】
また、軒先側に葺き下ろし梁１０１０を設けて増築する場合も、既存住宅の桁側面の軒先に沿って、軒先梁１００１の新たな設置が必要となる。この場合、トラス軒先部１００３の前処理、軒先梁設置金具４０４の配設、及び軒先梁１００１の設置については直交梁１００２の設置の場合と同様の手順で行い、図４４に示すように、直交梁接続部４０２に葺き下ろし梁１０１０の基部１０１１を接合させ、ボルト締めにより固定するとよい。
【００９２】
次に、軒先梁の設置の第２の実施形態は、図３６に示すように、既存住宅の桁側面の軒先に沿って、既存のトラス１０００の一側方に軒先梁１００１を設置し、且つ、増築部側に該軒先梁１００１と直交する方向へ直交梁１００２を設置する必要がある場合の軒先梁設置工法であって、第１の実施形態と同様の手順でトラス軒先部１００３に前処理を施し、図４５（ａ）に示すような、ウエブ跨ぎ部４１０と、軒先梁接続部４１１と、直交梁接続部４１２と、底部４１３を有する軒先梁設置金具４１４、又は、図４５（ｂ）に示すような、ウエブ跨ぎ部４１５と、軒先梁接続部４１６と、直交梁接続部４１７と、底部４１８を有する軒先梁設置金具４１９を、相隣接するトラス１０００の軒先側の端部に、軒先梁接続部４１１、又は４１６を相対向させてそれぞれ配設し、相対向する軒先梁接続部４１１又は４１６に、軒先梁１００１の両端部を接続することにより行うものである。以下、更に詳細に説明する。
【００９３】
ウエブ跨ぎ部４１０、及びウエブ跨ぎ部４１５は、第１の実施形態の軒先梁設置金具４０４のウエブ跨ぎ部４００と同様の形状を有しており、トラス１０００の軒先側の端部への設置方法は第１の実施形態と同様である。
【００９４】
軒先梁設置金具４１４の右側部に設けられた軒先梁接続部４１１は、ウエブ跨ぎ部４１０、及び底部４１３の双方と略９０°の角度をなしており、図４６に示すように、該軒先梁接続部４１１に、Ｈ型鋼である軒先梁１００１のウエブ１００８を当接させ、軒先梁接続部４１１に設けられた貫通孔４２０においてボルト締めで固定することにより、軒先に沿って軒先梁１００１を設置している。また、軒先梁設置金具４１９は、その左側部に軒先梁接続部４１６を有しており、それ以外の構造、及び軒先梁１００１の接続方法は軒先梁接続金具４１４と同様である。以上２つの軒先梁設置金具４１４と軒先梁設置金具４１９は、トラス１０００と、新たに追加する軒先梁１００１との位置関係に応じて使い分けるとよい。
【００９５】
直交梁接続部４１２、及び直交梁接続部４１７は、第１の実施形態の軒先梁設置金具４０４の直交梁接続部４０２と同一の形状を有し、第１の実施形態と同様の手順により、直交梁１００２、又は葺き下ろし梁１０１０を増築部側に設置することができる。
【００９６】
次に、この軒先梁の設置の第３の実施の形態は、図３６に示すように、既存住宅の桁側面の軒先に沿って、既存のトラス１０００の両側方に軒先梁１００１を設置し、且つ、増築部側に軒先梁１００１と直交する方向へ直交梁１００２を設置する必要がない場合の軒先梁設置工法であって、図４７に示すように、トラス軒先部１００３に前処理を施した後、図４８に示すような、傾斜部４３０と、補強板４３１を有する蓋部材４３２と、軒先梁接続部４３３と、傾斜部４３４と、ウエブ接合部４３５と、底部４３６を有する左右１対の羽根部材４３７とを具備する軒先梁設置金具４３８を、相隣接するトラス１０００の軒先側の端部に、突設された軒先梁接続部４３３を相対向させてそれぞれ配設し、相対向するこれら軒先梁接続部４３３に、軒先梁１００１の両端部を接続することにより行うものである。以下、更に詳細に説明する。
【００９７】
本実施形態の場合、トラス軒先部１００３に施す前処理として、図４７に示すように、トラス軒先部１００３を、軒先より若干増築部側の位置で切断し、軒先側部を除去している。これは、本実施形態では、増築部側に直交梁１００２を設ける必要がないため、トラス軒先部１００３が、増築部側に若干突出した状態で残っていても、邪魔とならないからである。もちろん、この場合、第１の実施形態の手順で前処理を施し、軒先梁設置金具４０４を設置しても構わないが、本実施形態のように、前処理を簡素化して、軒先梁設置金具４３８を用いた方が作業能率を向上できる、という利点がある。
【００９８】
図４８に示す羽根部材４３７は、その一側方に伸びる軒先梁接続部４３３を有し、該軒先梁接続部４３３は、底部４３６と、ウエブ接合部４３５の双方に略９０°の角度をなしている。軒先梁１００１の接続に際しては、軒先梁接続部４３３に、図４９に示すように、Ｈ型鋼である軒先梁１００１のウエブ１００８を当接させ、軒先梁接続部４３３に設けられた貫通孔４３９において、ボルト締めで固定することにより、軒先梁１００１を軒先に沿って設置している。
【００９９】
蓋部材４３２は、羽根部材４３７各々をその上部において連結し、一体化する役割を果たしており、羽根部材４３７の、外部からの力の作用に対するぐらつき、脱落等を防止するために設けられている。また、図４８に示すように、蓋部材４３２の構造上の弱さを補強するために、その内部に補強板４３１を設けている。
【０１００】
羽根部材４３７の傾斜部４３４と、蓋部材４３２の傾斜部４３０は、その傾斜角を等しくしてあり、図５１に示すように、双方を接合し、ボルト締めにより羽根部材４３７と蓋部材４３２を固定している。この傾斜角は、本実施形態の場合、トラス軒先部１００３の傾斜角と等しくしている。これにより、羽根部材４３７を、トラス１０００の軒先側の側部に納まり良く配置することが可能となっている。
【０１０１】
軒先梁設置金具４３８の設置に際しては、図５０、及び図５１に示すように、まず羽根部材４３７各々を、トラス１０００の軒先側の端部に、底部４３６がトラス１０００のフランジ１０１２と接合し、また、ウエブ接合部４３５がトラス１０００のウエブ１００６と接合するよう配設し、底部４３６に設けた貫通孔４４０においてボルト締めで固定する。次に、蓋部材４３２をトラス軒先部１００３の上方から被せ、蓋部材４３２の傾斜部４３０各々を、羽根部材４３７各々の傾斜部４３４に接合させる。更に蓋部材４３２の傾斜部４３０に設けた貫通孔４４１と、羽根部材４３７各々の傾斜部４３４に設けた貫通孔４４２の位置を合わせた上で、ボルト締めで固定すればよい。
【０１０２】
尚、本実施形態では、桁側面の軒先に沿って、トラス１０００の両側方に軒先梁１００１を設置する場合について述べたが、トラス１０００の一側方のみに軒先梁１００１を設置する場合にも、同様の手順で軒先梁設置金具４３８を設置し、羽根部材４３７の軒先梁接続部４３３のいずれか一方を使用しない状態にしておくとよい。この場合、羽根部材４３７を一方しか設置しないと、蓋部材４３２が安定せず、ぐらつき、脱落等が発生する可能性があるため、羽根部材４３７は常に左右一対を揃えた状態で用いるのが好ましい。
【０１０３】
以上説明した３つの実施形態のいずれの場合についても、軒先梁１００１の設置に際しては、図５２に示すように、トラス１０００―トラス１０００間、トラス１０００―隅木梁１０１３間、トラス１０００―登り梁１０１４間、あるいは登り梁１０１４―隅木梁１０１３間のいずれの場所に設置するのかにより、また、トラス１０００の軒先側の端部に設置する金具が、第１乃至３のいずれの実施形態のものなのかにより、軒先梁１００１の長手方向寸法、及び端部の形状を適宜変更する必要がある。
【０１０４】
特に、軒先梁１００１の一端側に既存の隅木梁１０１３がある場合には、軒先梁１００１の隅木梁１０１３側の端部に隅木梁接続梁４５０を設けることにより、軒先梁１００１が隅木梁１０１３に接触することを防止している。
【０１０５】
隅木梁接続梁４５０は、図５３に示すように、垂直板４５１と、該垂直板４５１の上端縁に固定され、垂直板４５１と直交する上面板４５２と、垂直板４５１の下端縁に固定され、垂直板４５１と直交する底面板４５３と、該底面板４５３上に固定され、内部が空洞である略直方体形状を有する箱部４５４と、箱部４５４の内部に設けられた補強板４５５とを有しており、図５５に示すように、上面板４５２、底面板４５３、及び垂直板４５１の端部が接合板１０１５を介して軒先梁１００１に固定されると共に、箱部４５４の底面に設けた貫通孔４５６において、ボルト締めで軸組１００７に固定されている。
【０１０６】
上面板４５２、及び垂直板４５１は、略長方形の平板の一部を斜めに切り落とした形状となっている。これにより、上面板４５２、及び垂直板４５１が、隅木梁接続梁４５０の斜め上方から斜め下方へと伸びる隅木梁１０１３と接触することを防止している。
【０１０７】
隅木梁１０１３と隅木梁接続梁４５０との接続部分において、増築部側に葺き下ろし梁１０１０を設けて増築する必要がある場合、図５４に示すように、箱部４５４の増築部側側面に、葺き下ろし梁１０１０の基部１０１１を接合させ、箱部４５４の増築部側側面に設けた貫通孔４５７において、ボルト締めにより固定すればよい。また、葺き下ろし梁１０１０を接続しない場合には、箱部４５４の増築部側側面は平坦面である必要は無く、箱部４５４の形状は、中空の略直方体に限られず、他の形状であっても構わない。
【０１０８】
また、図５２に示すように、軒先梁１００１の一端部を登り梁１０１４に接続する必要がある場合には、既存の登り梁接続金具１０１６等を用いて接続すればよい。
【０１０９】
【発明の効果】
以上説明したように、本発明の請求項１に記載の小屋組の増築施工法によれば、既存住宅の既存小屋組を全面的に解体することなく、既存大棟の端部から増築部の新規大棟の端部に向って隅木梁を延長させ、既存大棟の中間部の登り梁を新規大棟の端部に向って延長させることができるという利点がある。
【０１１０】
また、既存の小屋組を全面的に解体しないので、施工期間を短縮することができるだけでなく、労力を削減しながら作業性を向上させることができるという利点がある。
【０１１１】
更に、各部材の接続を締結具で締結することにより行うので、作業性の向上を図ることができるだけでなく、溶接接合と比べて、十分な安全性を確保することができるという利点がある。
【０１１２】
更にまた、既存の小屋組を全面的に解体しないので、産業廃棄物の発生量を減少させることができるだけでなく、これを運搬して処理するための費用を削減することができるという利点がある。
【０１１３】
そして、施工期間の短縮化により顧客に不便を強いる期間が短くなり、顧客の負担を軽減させることができるという利点がある。
【０１１４】
請求項２に記載の小屋組の増築施工法によれば、請求項１の利点に加えて、既存住宅の既存小屋組を全面的に解体することなく、既存小屋組と増築部の小屋組との境界に生じる谷部と増築部側の既存登り梁とが交差する交差部から新規隅木梁に向って登り梁を設置することができるという利点がある。
【０１１５】
請求項３に記載の小屋組の増築施工法によれば、小屋組のトラスの一端側から斜め下方にトラス軒先部が延設された住宅の桁側面への増築工事で、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加する必要がある場合に、既存住宅の前記軒先梁を追加する桁側面のトラス軒先部の軒先側部を切除し、相隣接するトラスの軒先側の端部に、突設された軒先梁接続部を相対向させて軒先梁設置金具をそれぞれ配設し、相対向するこれら軒先梁接続部に、軒先梁の両端部を接続することにより、既存住宅の小屋組や軒裏等を全面的に解体することなく、容易に軒先梁を設置することができるという利点がある。
【０１１６】
また、既存住宅の小屋組や軒裏等の全面的な解体が不要となることで、省力化、及び施工期間の大幅な短縮を図ることができると共に、従来、産業廃棄物として処理していた、解体時に生じる不要なトラスが発生しなくなることで、処理に要するコストを削減することができるという利点がある。
【０１１７】
請求項４の発明によれば、小屋組のトラスの一端側から斜め下方にトラス軒先部が延設された住宅の桁側面への増築工事で、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加する必要がある場合に、既存住宅の前記軒先梁を追加する桁側面のトラス軒先部を切除し、相隣接するトラスの軒先側の端部に、前記トラスのウエブを跨ぐウエブ跨ぎ部と、該ウエブ跨ぎ部から直角方向に突設された軒先梁接続部とを有する軒先梁接続金具を前記軒先梁接続部を相対向させてそれぞれ配設し、相対向するこれら軒先梁接続部に、軒先梁の両端部を接続することにより、既存住宅の小屋組や軒裏等を全面的に解体することなく、容易に軒先梁を設置することができるという利点がある。
【０１１８】
また、既存住宅の小屋組や軒裏等の全面的な解体が不要となることで、省力化、及び施工期間の大幅な短縮を図ることができると共に、従来、産業廃棄物として処理していた、解体時に生じる不要なトラスが発生しなくなることで、処理に要するコストを削減することができるという利点がある。
【０１１９】
即ち、本発明の小屋組の増築施工法によれば、施工の省力化、コストダウン及び廃棄物の削減を図ることができるという利点がある。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る小屋組全体の概略を示す平面図である。
【図２】新規隅木梁を含む小屋組を示す側面図である。
【図３】図２のＡ部分拡大図である。
【図４】隅木梁設置金具と新規隅木梁との接続手順を示す説明図である。
【図５】隅木梁設置金具の頂部母屋受けへの固定手順を示す平面図である。
【図６】図３の平面図である。
【図７】和小屋組での新規隅木梁を含む小屋組を示す側面図である。
【図８】新規登り梁を含む小屋組を示す側面図である。
【図９】登り梁延長金具を示す斜視図である。
【図１０】図８のＢ部分拡大図である。
【図１１】図１０の平面図である。
【図１２】新規登り梁束及び登り梁束接続金具を示す斜視図である。
【図１３】図８のＣ部分拡大図である。
【図１４】図１３の平面図である。
【図１５】登り梁延長金具の頂部母屋受けへの接続手順を示す説明図である。
【図１６】図１４のＤ部分における登り梁束接続金具の増築部側の既存登り梁への固定手順を示す説明図である。
【図１７】登り梁束接続金具の増築部側の既存登り梁への固定手順を示す説明図である。
【図１８】他の実施の形態の登り梁束接続金具を示す側面図である。
【図１９】他の実施の形態の登り梁束接続金具を示す平面図である。
【図２０】他の実施の形態の登り梁束接続金具を示す側面図である。
【図２１】和小屋組での新規登り梁を含む小屋組を示す側面図である。
【図２２】交差部を含む小屋組を示す側面図である。
【図２３】交差部を示す平面図である。
【図２４】谷木梁設置金具を示す概略斜視図である。
【図２５】新規谷木梁の接続手順を示す交差部の正面図である。
【図２６】谷木梁設置金具の交差部への固定手順を示す図２３のＥ側から見た側面図である。
【図２７】新規谷木梁の接続手順を示す交差部の平面図である。
【図２８】交差部の図２３のＥ側から見た側面図である。
【図２９】交差部の図２３のＦ側から見た側面図である。
【図３０】他の実施形態の谷木梁設置金具を示す図２３のＥ側から見た側面図である。
【図３１】和小屋組での交差部を含む小屋組を示す側面図である。
【図３２】新規の登り梁を設置した小屋組を示す概略平面図である。
【図３３】谷木梁設置金具を示す概略斜視図である。
【図３４】交差部を示す平面図である。
【図３５】交差部の図３４のＧ側から見た側面図である。
【図３６】本発明の実施の形態に係る小屋組全体の概略を示す平面図である。
【図３７】トラス軒先部への前処理の流れを説明するための説明図である。
【図３８】トラス軒先部への前処理を各手順ごとに説明するための説明図である。
【図３９】トラス軒先部への前処理を各手順ごとに説明するための説明図である。
【図４０】軒先梁設置金具の概略斜視図である。
【図４１】軒先梁設置金具の設置方法を説明するための概略斜視図である。
【図４２】軒先梁設置金具の設置状態を示す概略側面図である。
【図４３】軒先梁設置金具と軒先梁の接続部分を示す概略平面図である。
【図４４】軒先梁設置金具と葺き下ろし梁の接続部分を示す概略側面図である。
【図４５】軒先梁設置金具の概略斜視図である。
【図４６】軒先梁設置金具と軒先梁の接続部分を示す概略平面図である。
【図４７】トラス軒先部への前処理を説明するための説明図である。
【図４８】軒先梁設置金具の概略斜視図である。
【図４９】る軒先梁設置金具と軒先梁の接続部分を示す概略平面図である。
【図５０】軒先梁設置金具の設置方法を説明するための概略斜視図である。
【図５１】軒先梁設置金具の設置状態を示す概略側面図である。
【図５２】トラス、隅木梁、及び登り梁と、軒先梁の接続部分について説明するための概略平面図である。
【図５３】隅木梁接続梁の概略斜視図である。
【図５４】隅木梁接合梁と葺き下ろし梁の接合部分を示す概略平面図である。
【図５５】隅木梁接合梁と隅木梁の接合部分を示す概略斜視図である。
【符号の説明】
８既存登り梁
１００新規隅木梁
２００新規登り梁
２５０新規寄棟束
３００新規谷木梁
３０１交差部
３０３第１新規谷木梁
３０６第２新規谷木梁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extension work at the time of extension of a dormitory house, and relates to an extension construction method of a hut assembly in which a hut assembly of an extension part is constructed without completely dismantling the hut assembly of an existing house.
[0002]
[Prior art]
When an extension is added to a part of the girder of an existing house, the overall structure of the hut is often changed after the extension because the height of the building is changed or the direction of the building is changed (Fig. 1). reference).
[0003]
In such a case, it is necessary to add another member to the existing member of the existing shed, or remove the existing member and replace it with a new member. Need to be changed. For this reason, in the past, the existing hut assembly was completely dismantled and reconstructed into a new hut assembly.
[0004]
[Problems to be solved by the invention]
However, since the existing hut assembly was completely dismantled and reconstructed into a new hut assembly, it took a lot of time and labor, and not only the construction period was lengthened, but also the workability was poor. .
[0005]
In addition, when each component of the hut is made of a metal such as steel, it is possible to add another member to the existing member by welding. In consideration of living as usual in the past, there is a problem that it is difficult to ensure sufficient safety.
[0006]
Furthermore, there is a problem in that a large amount of industrial waste is generated by dismantling the existing hut assembly, and it is expensive to transport and process the waste.
[0007]
Furthermore, as mentioned above, in many cases, it is desirable that the extension work be completed in a short period because the customer lives in the existing house even during the extension work. As a result, the period of inconvenience to the customer becomes longer and the burden on the customer increases.
[0008]
The present invention has been made in view of the above problems, and in the extension work when the height of the extension part is higher than the height of the existing house at the middle part of the girder face of the existing house of the dormitory structure, The purpose is to provide an extension construction method for a cabin set that saves labor, reduces costs, and reduces waste.
[0009]
[Means for Solving the Problems]
The extension construction method of a hut assembly according to claim 1 of the present invention made to achieve the above object, wherein the height of the extension part is higher than the height of the existing house in the middle part of the girder face of the existing house It is a construction method of the hut assembly in the extension work at the time of extension, and the top purlin receptacle connection part installed in the top purlin receptacle installed at the upper end of the vertical member under the middle part of the existing large building and the top purlin receptacle connection A corner wooden beam mounting bracket having a corner wooden beam connecting portion that rises at an angle substantially equal to the rising angle of the existing corner wooden beam from one end side of the portion, connecting one end portion of the new corner wooden beam to the corner wooden beam connecting portion, By installing a new corner wooden beam in the middle of the large building, a corner wooden beam is installed from the middle of the existing large building toward the end of the new large building, and installed on the top of the vertical member in the middle of the existing large building. Installed on the upper end of the vertical member and the vertical member A climbing beam extension having a top purlin support connection portion installed in the club purlin support and a climbing beam connection portion rising from a central portion of one side of the purlin support connection portion at a rising angle substantially equal to a rising angle of an existing climbing beam By using a bracket, connecting one end of the new climbing beam to the climbing beam connecting portion, fixing the flat portion to the top of the vertical member, and fixing the top purlin receiving connection portion to the top purlin receiving In addition to installing one end of the new climbing beam on the extension of the existing climbing beam, connecting to the new climbing beam at the upper end and the climbing beam bundle fitting to be installed on the existing climbing beam on the extension side Using a new climbing beam bundle having a new climbing beam connection portion, fixing the climbing beam bundle connection bracket to the existing climbing beam, and connecting the new climbing beam bundle connection portion to the new climbing beam, The new climbing beam bundle is combined with the new climbing beam and the By vertically standing between the existing climbing beams on the building side, the climbing beam in the middle part of the existing large building is extended toward the end of the new large building, At the intersection where the trough that occurs at the boundary of the extension and the existing climbing beam on the side of the extension intersect, the installation is installed at the intersection, and the purlin receiver installed at the purlin receiver near the intersection On the extension of the first trough wooden beam connecting portion on the other side of the main building receiving connecting portion, the first trough wooden beam installing portion that rises from one side surface of the installing portion at a rising angle substantially equal to the rising angle of the existing corner wooden beam The end of the first new valley beam is connected to the first valley beam connection, and the end of the second valley beam is connected to the second valley beam connection. To the end of the first new trough and the second trough A trough is installed in the said trough part by installing an edge part on the said intersection part on a substantially straight line, It is characterized by the above-mentioned.
[0010]
The extension construction method of the hut assembly according to claim 2 is the extension construction method of the hut assembly according to claim 1, wherein the rising angle of the existing climbing beam from one side of the installation portion to the installation portion of the trough beam installation bracket A climbing beam connecting portion that rises at a substantially equal rising angle and connecting one end of the new climbing beam to the climbing beam connecting portion to install the climbing beam from the intersection toward the new corner wooden beam. It is characterized by.
[0011]
The extension construction method of the hut assembly according to claim 3 is the extension construction method of the hut assembly according to claim 1 or 2, wherein the truss eaves part is extended obliquely downward from one end side of the truss of the hut assembly. Eaves beam installation method to add a new eaves beam along the eaves on the side of the existing house's girder in the extension work on the side of the girder of the existing house, and the truss eaves on the side of the girder where the eaves beam of the existing house is added The eaves side parts of the eaves are cut out, and the eaves beam installation brackets are arranged on the ends of the eaves side of the adjacent trusses so that the projected eaves beam connection parts face each other. Both ends of the eaves beam are connected to the connecting portion.
[0012]
The extension construction method of the hut assembly according to claim 4 is the extension construction method of the hut assembly according to claim 1 or 2, wherein the truss eave portion is extended obliquely downward from one end side of the truss of the hut assembly. Eaves beam installation method to add a new eaves beam along the eaves on the side of the existing house's girder in the extension work on the side of the girder of the existing house, and the truss eaves on the side of the girder where the eaves beam of the existing house is added Eaves beam connection having a web straddling portion straddling the web of the truss and an eaves beam connecting portion projecting perpendicularly from the straddling web portion at the end portion of the eaves side of the adjacent truss The metal fittings are arranged so that the eaves end beam connecting portions face each other, and both end portions of the eaves end beam are connected to the opposite eaves end beam connection portions.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
First, as shown in FIG. 1, a new corner wooden beam 100 is installed at the boundary between the existing hut set and the new shed set of the extension section. As shown in FIG. 2, the new corner beam 100 is installed by attaching the corner beam mounting bracket 101 to the top purlin support 3 provided at the upper end 2 of the existing climbing beam bundle 1 which is a vertical member below the middle part of the existing building. This is done by connecting one end 102 of the new corner wooden beam 100.
[0014]
As shown in FIG. 2, the existing climbing beam true bundle 1 is obtained by fastening two C-shaped steels 4 with bolts, the opening portions face each other, and a gap with a desired interval is secured. The climbing beam connecting portion 5 is provided at the portion 2 and the large beam connecting portion is provided at the lower end portion (see FIG. 14).
[0015]
As shown in FIG. 3, the top purlin receptacle 3 is a metal fitting having a substantially L-shaped cross section, and the receiving portion 6 that receives the purlin is provided with a through hole 6 a for fixing the purlin to the top purlin receptacle 3. Yes.
[0016]
As shown in FIG. 3 or FIG. 4, the new corner wooden beam 100 has the same configuration as the existing climbing beam true bundle 1, and has a pair of through holes 100 a at both ends.
[0017]
As shown in FIG. 4, the corner beam mounting bracket 101 includes a flat portion 103 in which a through hole 103 a is formed, a rising portion 104 that rises substantially perpendicularly from one edge of the flat portion 103, and the rising portion 104. A corner wooden beam connecting portion 105 that rises from the back side at a rising angle substantially equal to the rising angle θ of the existing corner wooden beam (hereinafter referred to as “rising angle θ”), and upward from an edge that is substantially orthogonal to one edge of the flat portion 103 And a top purlin receiving connection portion 106 that rises. Although not shown, the existing corner wooden beams are provided so as to be taken in a direction of 45 ° from the end of the existing large building toward the exit corner of the existing eaves (see FIG. 1).
[0018]
As shown in FIG. 5, the flat portion 103 has a substantially rectangular shape, and the through hole 103 a is formed at a position that substantially coincides with the through hole 7 a of the top portion 7 of the existing climbing beam true bundle 1.
[0019]
As described above, the rising part 104 rises from one edge of the flat part 103 substantially perpendicularly upward, and the edge of the top purlin receiving connection part 106 is fixed to the side of the flat part 103 to reinforce the corner beam mounting bracket 101. ing.
[0020]
The length and the like of the corner wooden beam connecting portion 105 are not particularly limited, but the thickness is substantially equal to the gap between the two C-shaped steels 4 of the new corner wooden beam 100. The two through-holes 106a are positioned such that the line connecting the centers forms a rising angle θ with respect to the horizontal direction, and the distance between the two through-holes 106a is substantially equal to the pair of through-holes 100a at the one end 102 of the new corner beam 100. Has been drilled. Furthermore, in plan view, as shown in FIG. 5, it is fixed to the top purlin receiving connection portion 106 on the back side surface of the flat portion 103 of the rising portion 104 at an angle of approximately 135 ° with the rising portion 104. Accordingly, as shown in FIG. 6, when the top purlin receiving connection portion 106 is fixed to the receiving portion 6 of the top purlin receiving portion 3, the corner beam connecting portion 105 is positioned on an axis of 45 ° with respect to the existing large building direction. It will be.
[0021]
As shown in FIG. 5, the length of the top purlin receptacle connecting portion 106 is not particularly limited, but the height is substantially equal to the height of the receptacle 6 of the top purlin receptacle 3. Further, the through hole 106 a has a height position substantially coincident with the through hole 6 a of the receiving portion 6 when the top purlin receiving connection portion 106 is applied to the receiving portion 6 of the top purlin receiver 3, and the corner beam connecting portion 105. Is drilled so as to be located on the axis of 45 ° from the center of the top portion 7 of the existing climbing beam true bundle 1 with respect to the direction of the existing building (see FIG. 6).
[0022]
Hereinafter, the connection of the one end portion 102 of the new corner wooden beam 100 to the upper end portion 2 of the existing climbing beam true bundle 1 will be described. First, as shown in FIG. 4, the corner wood beam connecting portion 105 of the corner wood beam installation bracket 101 is inserted between the two C-shaped steels 4 constituting the new corner wood beam 100, and the one end 102 of the new corner wood beam 100 is inserted. By fastening the through hole 100a and the through hole 105a of the corner tree beam connecting portion 105 with a fastener 50 composed of bolts and nuts, one end 102 of the new corner tree beam 100 is connected to the corner tree beam installation bracket 101.
[0023]
Then, as shown in FIG. 5, the flat portion 103 of the corner beam mounting bracket 101 is placed on the top portion 7 of the existing climbing beam true bundle 1, and the through hole 7 a of the top portion 7 of the existing climbing beam true bundle 1 and the through hole 103 a of the flat portion 103. Are fastened with the fastener 50, and the top purlin receiving connection portion 106 of the corner beam mounting bracket 101 is applied to the receiving portion 6 of the top purlin receiver 3 on the extension portion side, and the receiving portion of the top purlin receiver 3 on the extension portion side 6 and the through hole 106a of the top purlin receiving connection portion 106 are fastened by a fastener 50, and the corner beam installation metal fitting 101 is fixed to the upper end 2 of the existing climbing beam true bundle 1 to obtain FIGS. As shown in FIG. 1, one end 102 of the new corner beam 100 is connected to the upper end 2 of the existing climbing beam true bundle 1.
[0024]
As described above, as shown in FIG. 2, one end 102 of the new corner beam 100 is connected to the upper end 2 of the existing climbing beam true bundle 1, and the new corner beam 100 is formed at the boundary between the existing cabin group and the new cabin group of the extension unit. Is installed (see FIG. 1).
[0025]
In the present embodiment, one end portion 102 of the new corner beam 100 and the corner beam connection portion 105 of the corner beam installation bracket 101 are connected by bolting at the construction site, but the present invention is not limited to this. In the factory, one end 102 of the new corner beam 100 may be connected to the corner beam connection portion 105 of the corner beam mounting bracket 101 by welding. Thereby, the work at the construction site can be reduced.
[0026]
In the present embodiment, the existing hut assembly is a truss hut assembly. However, as shown in FIG. 7, the existing hut assembly is the same as the Japanese hut assembly. One end 102 of the new corner beam 100 is connected to the upper end 2 of the existing climbing beam true bundle 1.
[0027]
2ndly, as shown in FIG. 1, the existing climbing beam 8 installed in the intermediate part of the existing large ridge is extended toward the edge part of the new large ridge on the extension part side. As shown in FIG. 8, the extension of the existing climbing beam 8 is performed by attaching one end 201 of the new climbing beam 200 to the upper end 10 of the existing climbing beam bundle 9, which is a vertical member below the middle part of the existing large building, and climbing beam extension bracket 202. And the new climbing beam bundle 203 is installed between the existing climbing beam 11 and the new climbing beam 200 on the extension portion side by using the climbing beam bundle connecting bracket 204.
[0028]
As shown in FIG. 8, the existing climbing beam 8 and the existing climbing beam 11 on the side of the extension part are fastened with two C-shaped steels 4 by bolting, the openings face each other, and at a desired interval. The clearance is secured and supported by the existing climbing beam bundle 9 and the existing climbing beam bundle 12 so as to descend obliquely downward from the existing large building toward the end of the existing beam.
[0029]
Further, a top purlin receiver 13 having a substantially L-shaped cross section is formed on the upper end portion 10 of the existing climbing beam true bundle 9, and a main purlin receiver 14 having a substantially L-shaped cross section is provided on the upper surfaces of the existing climbing beam 8 and the existing climbing beam 11 on the extension portion side. Each is provided. Further, through holes 15a and 16a for fixing the purlin are formed in the receiving portions 15 and 16 for receiving the purlin, respectively (see FIG. 15 or FIG. 17).
[0030]
As shown in FIG. 8, the new climbing beam 200 has the same configuration as that of the existing climbing beam 8 and the existing climbing beam 11 on the extension portion side, and the climbing beam extension bracket 202 and the new climbing beam bundle are spaced at a predetermined interval. A through hole 200a for connection to 203 is formed (see FIG. 17).
[0031]
As shown in FIG. 9, the climbing beam extension bracket 202 includes a substantially rectangular top purlin receiving connection portion 205 having through holes 205 a formed at both ends, and a substantially rectangular shape having through holes 206 a formed at both ends. A rising angle (hereinafter referred to as “rising angle α”) that is substantially equal to an angle α formed by the large beam shown in FIG. 8 and the existing climbing beam 8 with respect to the horizontal direction from the central portion of the back side surface of the flat portion 206 and the top purlin receiving connection portion 205. Reinforcing the climbing beam connecting portion 207 having two through holes 207a formed at the end facing the top purlin receiving connection portion 205, and the top purlin receiving connection portion 205 and the flat portion 206. Part 208.
[0032]
As shown in FIG. 10 or FIG. 11, the length of the top purlin receiving connection portion 205 is substantially equal to the length of the receiving portion 15 of the top purlin receiving portion 13, and the through hole 205 a connects the top purlin receiving connection portion 205 to the top purlin. A hole is formed at a position substantially coincident with the through hole 15 a of the top purlin receiver 13 when it is applied to the receiver 15 of the receiver 13.
[0033]
The length of the flat portion 206 is substantially equal to the length of the top purlin receiving connection portion 205, and the through hole 206 a has the existing climbing beam true bundle 9 when the top purlin receiving connection portion 205 is applied to the receiving portion 15 of the top purlin receiving portion 13. Is drilled at a position substantially coinciding with the through-hole 17a drilled in the top portion 17 of the.
[0034]
The length of the climbing beam connecting portion 207 is not particularly limited, but the thickness is substantially equal to the gap between the two C-shaped steels 4 of the new climbing beam 200, and the two through holes 207a are lines connecting the centers thereof. Is formed at a position where the rising angle α is formed with respect to the horizontal direction and the interval is substantially equal to the through hole 200a of the new climbing beam 200. Thus, when the climbing beam extension fitting 202 is fixed to the existing climbing beam true bundle 9, the climbing beam connecting portion 207 is positioned on the extension of the existing climbing beam 8.
[0035]
The reinforcing portion 208 is fixed to the end edge of the top purlin receiving connection portion 205 at one end and to the end edge of the flat portion 206 at the lower end thereof, so that the top purlin receiving connection portion 205 and the flat portion 206 are connected to each other. The top purlin receiving connection portion 205 and the flat portion 206 are connected while securing a gap 209 therebetween.
[0036]
12, the new climbing beam bundle 203 has the same configuration as that of the existing climbing beam bundle 12, as shown in FIG. 12, and the new climbing beam connecting portion 210 having a through hole 210a formed at the upper end thereof is provided at the lower end. The climbing beam bundle connection fitting 204 is provided in each part. The two through-holes 210a of the new climbing beam connecting portion 210 have positions where the line connecting the centers forms a rising angle α with respect to the horizontal direction, and the interval is substantially equal to the through-hole 200a of the new climbing beam 200. (See FIG. 17).
[0037]
As shown in FIG. 12, the climbing beam bundle fitting 204 has a substantially rectangular installation portion 211, and a predetermined rising angle at the upper surface of the installation portion 211 at a central portion in the width direction and substantially parallel to the longitudinal direction of the installation portion 211. The climbing beam bundle connecting part 212 installed at β, and the lower surface of the installation part 211 project substantially at a 90 ° angle to the central part in the width direction and substantially parallel to the longitudinal direction of the installation part 211. And an existing climbing beam connecting portion 213 having a through-hole 213a formed at the end facing it, and a purlin receiver having a through-hole 214a formed at both ends thereof at an angle of approximately 90 ° from one end of the installation portion 211 The connecting portion 214 includes a reinforcing portion 215 that rises from the both side edges of the installation portion 211 at approximately 90 ° and has the side edges of the purlin receiving connection portion 214 fixed to one end.
[0038]
As shown in FIG. 13 or FIG. 14, the installation part 211 is installed on the upper surface of the existing climbing beam 11 on the extension part side, and its width is substantially equal to the width of the receiving part 16 of the main building receiver 14, and its length This is shorter than the installation interval of the purlin receiver 14. In addition, an unevenness adjusting portion 216 having a thickness substantially equal to the thickness of the purlin receptacle 14 is provided on the lower surface of the end facing the purlin receptacle connection portion 214.
[0039]
The climbing beam bundle connection portion 212 is for connecting the lower end portion of the new climbing beam bundle 203 to the climbing beam bundle connection fitting 204, and is a reinforcement for reinforcing the climbing beam bundle connection portion 212 at the central portion of one side surface thereof. Ribs 217 are provided. The position of the climbing beam bundle connection portion 212 in the length direction is such that the new climbing beam bundle 203 is directly above the existing climbing beam bundle 12 when the climbing beam bundle connection fitting 204 is installed on the existing climbing beam 11 on the extension portion side. Position. Further, when the climbing beam bundle connecting bracket 204 is installed on the existing climbing beam 11 on the extension portion side by setting the rising angle β to 90 ° and adding the rising angle α of the existing climbing beam 8 shown in FIG. The bundle connection part 212 is vertically erected on the existing climbing beam 11 on the extension part side.
[0040]
In the present embodiment, the connection between the new climbing beam bundle 203 and the climbing beam bundle connecting portion 212 is performed by welding. However, the present invention is not limited to this. Alternatively, through holes may be formed in the upper ends of the upper part and the climbing beam bundle connection part 212, and the new climbing beam bundle 203 may be connected to the climbing beam bundle connection part 212 by bolting.
[0041]
The existing climbing beam connecting portion 213 is for installing the climbing beam bundle connecting bracket 204 on the existing climbing beam 11 on the extension portion side, and the thickness thereof is two C-shaped steels of the existing climbing beam 11 on the extension portion side. 4 is substantially equal to the gap of 4 and its length is longer than the length of the web of the C-shaped steel 4.
[0042]
The purlin support connection portion 214 is fixed to the reception portion 16 of the purlin support 14 and fixes the climbing beam bundle connection fitting 204 to the existing climbing beam 11 on the extension portion side, and its width is the reception portion 16 of the purlin support 14. The height is substantially equal to the height of the receiving portion 16 of the purlin receiver 14. The through hole 214a is formed at a position substantially coincident with the through hole 16a of the receiving part 16 of the purlin receiver 14 when the installation part 211 is placed on the upper surface of the existing climbing beam 11 on the extension part side (FIG. 17). reference).
[0043]
As shown in FIG. 12, the reinforcing portion 215 reinforces the climbing beam bundle connection fitting 204, and prevents the water from accumulating at the lower corner portion of the installation portion 211 toward the purlin receiving connection portion 214. A drainage part 218 is provided by cutting out a part of the edge in contact with the corner part.
[0044]
Hereinafter, the connection of the end 201 of the new climbing beam 200 to the upper end 10 of the existing climbing beam true bundle 9 will be described. First, as shown in FIG. 15, the climbing beam connecting portion 207 of the climbing beam extension bracket 202 is inserted between the two C-shaped steels 4 constituting the new climbing beam 200, and the one end 201 of the new climbing beam 200 is inserted. The one end 201 of the new climbing beam 200 is connected to the climbing beam extension fitting 202 by fastening the through hole 200a and the through hole 207a of the climbing beam connection portion 207 of the climbing beam extension fitting 202 with a fastener (not shown). To do.
[0045]
Then, the top purlin support 13 on the extension portion side is fitted into the gap 209 of the climbing beam extension bracket 202, and the top purlin receiving connection portion 205 of the climbing beam extension bracket 202 is applied to the receiving portion 15 of the top purlin support 13 on the extension portion side. The through hole 15a of the receiving part 15 and the through hole 205a of the top purlin receiving connection part 205 are fastened by the fastener 50, and the flat part 206 of the climbing beam extension fitting 202 is placed on the top part 17 of the existing climbing beam true bundle 9. By fastening the through-hole 17a of the top portion 17 and the through-hole 206a of the flat portion 206 with the fastener 50, the climbing beam extension fitting 202 is fixed to the top purlin support 13 on the extension portion side and the top portion 17 of the existing climbing beam true bundle 9. . Accordingly, as shown in FIGS. 10 and 11, one end 201 of the new climbing beam 200 is connected to the upper end 10 of the existing climbing beam true bundle 9 and is positioned on the extension of the existing climbing beam 8.
[0046]
Next, the installation of the new climbing beam bundle 203 on the existing climbing beam 11 on the extension part side will be described. First, as shown in FIG. 16, the existing climbing beam connecting portion 213 of the climbing beam bundle connecting bracket 204 is inserted between the two C-shaped steels 4 of the existing climbing beam 11 on the extension portion side, and the climbing beam bundle connecting bracket 204 is inserted. The installation portion 211 is placed on the upper surface of the existing climbing beam 11 on the extension portion side, and through holes 219a are formed on both sides of the protruding portion of the existing climbing beam connecting portion 213 protruding from the lower surface of the existing climbing beam 11 on the extension portion side. Are attached to each of the two folded plates 219, and the through-hole 219a of each plate 219 and the through-hole 213a of the existing climbing beam connecting portion 213 are fastened by the fastener 50. 204 is installed on the upper surface of the existing climbing beam 11 on the extension part side.
[0047]
Further, as shown in FIG. 17, the purlin receiving connection portion 214 of the climbing beam bundle connecting bracket 204 is applied to the receiving portion 16 of the purlin receiving portion 14 near the existing climbing beam bundle 12, and the through hole 214a of the purlin receiving connection portion 214 is received. By fastening the through hole 16a of the portion 16 with the fastener 50 and fixing the purlin support connection portion 214 to the purlin support 14, the climbing beam bundle connection fitting 204 is fixed to the upper surface of the existing climbing beam 11 on the extension portion side. . Thereby, as shown in FIG.13 and FIG.14, the climbing beam bundle connection metal fitting 204 is fixed to the existing climbing beam 11 of the extension part side.
[0048]
Then, as shown in FIG. 17, the new climbing beam connecting portion 210 is inserted between the two C-shaped steels 4 of the new climbing beam 200, and the through hole 200 a of the new climbing beam 200 and the new climbing beam connecting portion 210 are penetrated. The new climbing beam connecting portion 210 is connected to the new climbing beam 200 by fastening the hole 210a with a fastener (not shown). Thereby, as shown in FIG. 13, the new climbing beam bundle 203 is erected vertically right above the existing climbing beam bundle 12.
[0049]
As described above, as shown in FIG. 8, the new climbing beam bundle 203 is erected vertically between the existing climbing beam 11 and the new climbing beam 200 on the extension portion side to support the new climbing beam 200. The beam 200 is installed on the extension of the existing climbing beam 8 at the rising angle α, that is, as shown in FIG. 1, the existing climbing beam 8 is extended toward the end of the new large building on the extension side. It becomes.
[0050]
As shown in FIG. 18, when the new climbing beam bundle 203 is provided to be shifted from directly above the existing climbing beam bundle 12 for the sake of design, the purlin receiving connection portion 214 is provided at the other end portion of the installation portion 211. By using the provided climbing beam bundle connection fitting 220 and fixing the purlin support connection portion 214 of the climbing beam bundle connection fitting 220 to the main building receiver 14, the new climbing beam bundle 203 is used as the existing climbing beam 11 on the extension portion side. Install.
[0051]
Furthermore, in the present embodiment, the new climbing beam bundle 203 is one C-shaped steel 4, but it is also possible to form two C-shaped steels 4 in the same manner as the existing climbing beam true bundle 9. As shown in FIG. 19, the climbing beam bundle connection fitting 230 in this case has a length of the installation portion 211 that is substantially equal to the installation interval of the purlin support 14, and the purlin support connection portions 214 are provided at both ends of the installation portion 211. Yes.
[0052]
As shown in FIG. 20, the climbing beam bundle connection fitting 230 is fitted between the two purlin receptacles 14 to connect the climbing beam bundle fitting 230 to the existing climbing beam 11 on the side of the extension part. The fourteen receiving portions 16 and the respective purlin receiving connection portions 214 are fastened by the fasteners 50. The new climbing beam bundle 203 and the climbing beam bundle connection fitting 230 are connected by forming through holes in the lower end portion of the new climbing beam bundle 203 and the upper end portion of the climbing beam bundle connecting portion 212, respectively. Although the hole is fastened with the fastener 50, since the fitting angle of the climbing beam bundle connection fitting 204 to the existing climbing beam 11 on the extension portion side is limited, the climbing beam bundle connection fitting 204 is installed on the extension portion side. The connection is made after fixing to the climbing beam 11.
[0053]
Furthermore, in the embodiment of the present invention, the hut set of the existing house is a truss hut set. However, as shown in FIG. 21, the same applies when the existing hut set is a Japanese hut set. One end portion 201 of the new climbing beam 200 is connected to the upper end portion 10 of the existing climbing beam true bundle 9 using the beam extension fitting 202, and the new climbing beam bundle 203 is connected to the existing climbing beam on the extension portion side using the climbing beam bundle connection fitting 204. 11 and the new climbing beam 200 are erected vertically.
[0054]
Thirdly, as shown in FIG. 8, the new dormitory bundle 250 is erected vertically on the existing climbing beam 11 on the extension portion side. The new dormitory bundle 250 is erected by fixing the lower end portion of the new dormitory bundle 250 to the main building receiver 14 installed on the existing climbing beam 11 on the extension portion side using the climbing beam bundle connecting bracket 204. .
[0055]
The new dormitory bundle 250 has the same structure as the existing climbing beam true bundle 1 shown in FIG. 3, and is obtained by fastening two C-shaped steels 4 with bolts so that the opening faces outward, Are provided with a top purlin receptacle 13 and a beam connecting bracket 251, and a climbing beam bundle connecting bracket 204 is provided at the lower end thereof.
[0056]
Then, the other end of the new corner wooden beam 100 and the other end of the new climbing beam 200 are connected to the beam connecting bracket 251 of the new dormitory bundle 250. This connection is performed by the same procedure as described above, that is, by inserting the corner beam connecting portion of the beam connecting bracket 251 between the two C-shaped steels 4 constituting the new corner beam 100, By bolting the end and the beam connecting bracket 251, the other end of the new corner wooden beam 100 is connected to the beam connecting bracket 251, and the beam is interposed between the two C-shaped steels 4 constituting the new climbing beam 200. The climbing beam connecting portion of the connection fitting 251 is inserted, and the new climbing beam 200 and the beam connection fitting 251 are bolted (see FIG. 8).
[0057]
Thus, as shown in FIG. 1, the new corner beam 100 is installed between the existing berth bundle and the new berth bundle 250, and the new climbing beam 200 is placed between the existing climbing beam true bundle 9 and the new berth bundle 250. The existing corner wooden beam and the existing climbing beam 8 are respectively extended to the extension portion side corresponding to the hut assembly after the extension.
[0058]
3rdly, as shown in FIG. 1 or FIG. 22, the new trough wooden beam 300 is installed in the trough generate | occur | produced in the boundary of the existing hut set and the new shed set of an extension part. As shown in FIG. 23, the new valley tree beam 300 is installed by fixing a valley tree beam installation bracket 302 at an intersection 301 where the valley portion and the existing climbing beam 18 on the extension portion side intersect, and one end portion of the first new valley tree beam 303. 304 is connected to the first trough beam connecting portion 305 of the trough beam mounting bracket 302, and one end 307 of the second new trough beam mounting bracket 302 is connected to the second trough beam connecting portion 308 of the trough beam mounting bracket 302.
[0059]
As shown in FIG. 22, the existing climbing beam 18 on the extension portion side has the same configuration as the existing climbing beam 8 shown in FIG. 8 and the existing climbing beam 11 on the extension portion side.
[0060]
As shown in FIG. 1, the new valley tree beam 300 has a first new valley tree beam 303 and a second new valley tree beam 306, and has the same configuration as the new corner tree beam 100 shown in FIG. A pair of through-holes 303a and 306a are formed in the base plate (see FIG. 27).
[0061]
As shown in FIG. 24 or FIG. 25, the trough beam installation bracket 302 is provided to project from the installation section 309 having a substantially H-shaped cross section and the center in the width direction of the lower surface of the web plate 310 of the installation section 309. The climbing beam connecting portion 311 having a through-hole 311a drilled in the opposite end and the one end of the web plate 310 of the installation portion 309 stand up at about 90 °, and the through-hole 312a is drilled in both ends thereof. The purlin receiving connection portion 312, the first trough beam connection portion 305 that rises from the outer surface of one flange plate 313 F of the installation portion 309 at the rising angle θ substantially equal to the rising angle θ of the existing corner wooden beam, and the installation portion 309. And the second valley beam connection portion 308 installed on the extension of the first valley beam connection portion 305 of the other flange plate 313S.
[0062]
The web plate 310 of the installation part 309 has a length shorter than the installation interval of the purlin receiver 19, and its width is substantially equal to the width of the reception part 20 of the purlin receiver 19. In addition, an unevenness adjusting portion 314 having a thickness substantially equal to the thickness of the purlin receiver 19 is provided on the lower surface of the other end portion. Further, the flange plates 313F and 313S of the installation portion 309 are drained by cutting out a part of the edge in contact with the lower corner portion so that water does not collect in the lower corner portion of the web plate 310 toward the purlin receiving connection portion 312. A portion 315 is provided.
[0063]
The thickness of the climbing beam connecting portion 311 is substantially equal to the gap between the two C-shaped steels 4 of the existing climbing beam 18 on the extension portion side, and the length thereof is longer than the length of the web of the C-shaped steel 4.
[0064]
The length of the purlin receptacle connecting portion 312 is substantially equal to the length of the receptacle portion 20 of the purlin receptacle 19, and the through hole 312a is formed when the trough beam installation bracket 302 is placed on the existing climbing beam 18 on the extension portion side. It is drilled at a position substantially coinciding with the through hole 20a of the receiving portion 20 of the receiving 19 (see FIG. 26). The purlin receptacle 19 has the same configuration as the purlin receptacle 14 shown in FIG.
[0065]
As shown in FIG. 23, the length of the first valley beam connecting portion 305 is not particularly limited, but the thickness is substantially equal to the gap between the two C-shaped steels 4 of the first new valley beam 303. is doing. In plan view, it is fixed to the flange plate 313F of the installation portion 309 at an angle of approximately 45 °. Accordingly, when the installation portion 309 is installed on the existing climbing beam 18 on the extension portion side, the first valley beam connection portion 305 is positioned on the 45 ° axis with respect to the existing climbing beam 18 on the extension portion side. Further, as shown in FIG. 25, the two through holes 305a have a rising angle θ with respect to the horizontal direction as a line connecting the centers thereof, and the distance between the two through holes 305a is substantially the same as that of the pair of through holes 303a of the first new valley beam 303. The holes are drilled at equal intervals (see FIG. 27).
[0066]
As shown in FIG. 25, the second valley beam connecting portion 308 has the same configuration as the first valley beam connecting portion 305, and the two through holes 308a have a line connecting the centers of the first valley tree beam connecting portion 305. It is drilled so as to be located on the extension of the line connecting the centers of the through holes 305a.
[0067]
Hereinafter, the installation of the new valley tree beam 300 in the valley will be described. First, as shown in FIG. 25, the climbing beam connecting portion 311 of the valley beam setting bracket 302 is inserted between the two C-shaped steels 4 of the existing climbing beam 18 on the extension portion side, and the setting portion 309 of the valley beam setting bracket 302 is set. A through-hole 316a is formed on one side on both sides of the protruding portion of the climbing beam connecting portion 311 which is placed on the upper surface of the existing climbing beam 18 on the extension portion side and protrudes from the lower surface of the existing climbing beam 18 on the extension portion side. Each of the folded plates 316 is assigned, and the through hole 316a of each plate 316 and the through hole 311a of the climbing beam connecting portion 311 are fastened by the fastener 50, whereby the valley beam mounting bracket 302 is attached to the existing climbing beam 18 on the extension portion side. Install it on the top surface.
[0068]
Further, as shown in FIG. 26, the purlin receptacle connecting portion 312 of the trough beam installation bracket 302 is applied to the receiving portion 20 of the purlin receptacle 19, and the through hole 312 a of the purlin receptacle connecting portion 312 and the through hole of the receiving portion 20 of the purlin receptacle 19. 20a is fastened with the fastener 50, and the purlin support connection portion 312 is fixed to the purlin support 19, whereby the trough beam installation fitting 302 is fixed to the upper surface of the existing climbing beam 18 on the extension portion side.
[0069]
Next, as shown in FIG. 27, the first trough beam connecting portion 305 of the trough beam installation bracket 302 is inserted into the gap between the two C-shaped steels 4 constituting the first new trough beam 303, and one end of the first new trough beam 303 is inserted. The one end 304 of the first new trough beam 303 is connected to the trough beam mounting bracket 302 by fastening the through hole 303a of the portion 304 and the thru hole 305a of the first trough beam connecting portion 305 of the trough beam mounting bracket 302 with the fastener 50. . As a result, as shown in FIG. 28, the first new valley beam 303 is installed from the intersection 301 toward the end of the new corner beam 100 (see FIG. 1).
[0070]
Similarly, as shown in FIG. 27, the second trough beam connecting portion 308 of the trough beam mounting bracket 302 is inserted into the gap between the two C-shaped steels 4 constituting the second new trough beam 306 as in the first new trough beam 303. Then, by fastening the through hole 306a of the one end portion 307 of the second new valley beam 306 and the through hole 308a of the second valley beam connection portion 308 of the valley beam installation fitting 302 with the fastener 50, one end of the second new valley beam 306 is obtained. The part 307 is connected to the trough beam mounting bracket 302. Thus, as shown in FIG. 29, the second new valley tree beam 306 is installed from the intersection 301 toward the corner of the eaves. Therefore, the new valley tree beam 300 is installed at the intersection 301 of the valley.
[0071]
Next, as shown in FIG. 3, the other end 319 of the first new valley beam 303 is connected to the valley beam connection portion 318 of the beam connecting bracket 317 installed in the existing climbing beam true bundle 1 to which the new corner beam 100 is connected. As described above, this connection is achieved by inserting the trough beam connecting portion 318 of the beam connecting bracket 317 into the gap between the two C-shaped steels 4 of the first new trough beam 303 and connecting the other end 319 of the first new trough beam 303 to the beam. This is performed by fastening the valley-beam connection portion 318 of the metal fitting 317 with the fastener 50.
[0072]
As described above, as shown in FIG. 1, the new valley beam 300 is installed in the valley.
[0073]
In this embodiment, the purlin support connection portion 312 is provided at one end of the installation portion 309. However, as shown in FIG. 30, depending on the design, the purlin support is provided at the other end of the installation portion 309. The valley beam installation bracket 320 provided with the connection part 312 is used.
[0074]
In the present embodiment, the existing hut assembly is a truss hut assembly. However, as shown in FIG. 31, the same applies to the case where the existing hut assembly is a Japanese hut assembly. The first new valley beam 303 and the second new valley beam 306 are installed in the valley using the beam connecting metal 317.
[0075]
Furthermore, when it is necessary for the design, as shown in FIG. 32, a new climbing beam 350 is installed from the intersection 301 toward the new corner wooden beam 100 substantially parallel to the existing large building. The new climbing beam 350 is installed using a valley beam connecting metal fitting 351 shown in FIG. The new climbing beam 350 has the same configuration as that of the existing climbing beam 18 on the extension portion side shown in FIG.
[0076]
As shown in FIG. 33, the trough beam mounting bracket 351 has the same configuration as that of the trough beam mounting bracket 302 shown in FIG. 24, and the flange 313F on the first trough beam connecting portion 305 side of the mounting portion 309 is provided on the outer surface of the flange plate 313F. A new climbing beam connecting portion 352 that rises from the outer surface at a rising angle approximately equal to the rising angle α (see FIG. 22) of the existing climbing beam 18 on the extension portion side is provided.
[0077]
As shown in FIG. 33 or FIG. 34, the new climbing beam connection portion 352 has the same configuration as the first valley beam connection portion 305 and the second valley beam connection portion 308, and in the plan view, the flange plate of the installation portion 309 It is fixed at an angle of approximately 90 ° with 313F. As a result, when the installation part 309 is installed on the existing climbing beam 18 on the extension part side, the new climbing beam connection part 352 forms approximately 90 ° with respect to the existing climbing beam 18 on the extension part side.
[0078]
The connection of the new climbing beam 350 to the intersection 301 is first performed by fixing the valley beam mounting bracket 302 to the existing climbing beam 18 on the extension portion side in the same manner as described above, and the first new valley beam 303 and the second new valley beam 306. The one end portion 353 of the new climbing beam 350 is connected to the new climbing beam connecting portion 352 of the trough beam installation bracket 302 by bolting in the same procedure (see FIG. 27). Accordingly, as shown in FIGS. 34 and 35, the new climbing beam 350 is installed from the intersection 301 toward the new corner beam 100 (see FIG. 32).
[0079]
Next, although not shown, the other end of the new climbing beam 350 is newly connected by bolting the other end of the new climbing beam 350 to a beam connecting bracket installed at a predetermined position of the new corner beam 100. Connect to the corner beam 100. Thus, as shown in FIG. 32, the new climbing beam 350 is installed between the new corner wooden beam 100 and the new valley wooden beam 300 substantially parallel to the existing large building.
[0080]
Fourth, as shown in FIG. 36, a new eaves beam is added along the eaves on the side surface of the existing house. In the first embodiment of the installation of the eaves beams, eaves beams 1001 are installed on both sides of the existing truss 1000 along the eaves on the side surface of the existing house, and the eaves beams 1001 are installed on the extension portion side. The eaves beam installation method in the case where it is necessary to install the orthogonal beam 1002 in a direction substantially orthogonal to the truss, the pre-treatment is applied to the truss eaves part 1003 by the procedure shown in FIG. 37, and the web as shown in FIG. The eaves beam connecting portion 401, the eaves beam connecting portion 401, the orthogonal beam connecting portion 402, and the eaves beam mounting bracket 404 having the bottom portion 403 are opposed to the end portions of the adjacent truss 1000 on the eaves side. This is performed by connecting both end portions of the eaves beam 1001 to the eaves beam connection portions 401 that are arranged in the direction opposite to each other. This will be described in more detail below.
[0081]
When installing the eaves beam installation bracket 404 at the end of the truss 1000 on the eaves side, the truss eaves part 1003 and the plate 1004 provided at the end of the eaves side of the truss 1000 are obstructive, so they are removed. A pretreatment step is required. FIG. 37 shows the procedure of this pretreatment process, and FIGS. 38 and 39 show the state after the work for each procedure.
[0082]
In step 1, the truss eaves part 1003 is excised. This is because the truss eaves tip portion 1003 is appropriately shortened to facilitate later work. Here, FIG. 38A shows a state before the operation of this procedure, and FIG. 38B shows a state after the operation. In addition, as a tool used for a cutting | disconnection, a reciprocating saw (not shown) can be used, for example, and it is the same also about the cutting operation mentioned later.
[0083]
In step 2, in order to remove the plate 1004 having a substantially inverted L-shaped cross section provided at the end of the truss 1000 on the eaves side, facing the eaves, the plate 1004 and the truss 1000 are aligned with each other. The truss eaves tip 1003 is cut in the vertical direction. At this time, it is easy to cut by avoiding the welded portion between the plate 1004 and the truss 1000 and cutting slightly inside the joint surface between the plate 1004 and the truss 1000. Here, FIG.38 (c) represents the state after the operation | work of this procedure.
[0084]
In the procedure 3, the truss eave portion 1003 is cut until reaching the web 1006 of the truss 1000 slightly on the eave end side from the distal end portion of the C-type channel 1005 of the truss 1000. This is in order to remove a portion that hinders the installation of the eaves beam installation metal fitting 404. Here, FIG.38 (d) represents the state after the operation | work of this procedure.
[0085]
In step 4, the plate 1004 is cut off from the truss 1000 by cutting the lower part of the plate 1004 horizontally from the eaves side. Here, FIG. 39A shows a state after the operation of this procedure.
[0086]
In the procedure 5, for example, by polishing with a tool such as a sander (not shown), the remaining pieces of the plate 1004 remaining in the lower portion of the truss 1000 in the procedure 4 are removed. Thereby, there exists an advantage that the accommodation to the site | part of the eaves beam installation metal fitting 404 becomes good. Here, FIG. 39B shows a state after the operation of this procedure.
[0087]
In step 6, along the inclination of the web 1006 of the truss 1000 from the eaves side to the position cut in step 3, the joint surface between the truss 1000 and the truss eaves part 1003 is cut, and the eaves side part of the truss eaves part 1003 is It has been removed. Here, FIG. 39C shows a state after the operation of this procedure.
[0088]
40. The pair of left and right web straddling portions 400 that rise in the vertical direction from the bottom portion 403 of the eaves beam installation metal fitting 404 shown in FIG. 40 are arranged substantially in parallel with an interval slightly larger than the thickness of the web 1006 of the truss 1000. . When installing the eaves-end beam mounting bracket 404, as shown in FIGS. 41 and 42, the web straddling portion 400 straddles the end portion on the eave end side of the web 1006 of the truss 1000 subjected to the pretreatment as described above. The eaves beam installation metal fitting 404 is applied, and the eaves beam installation metal fitting 404 is pushed in until the end of the web 1006 of the truss 1000 on the eaves side reaches the orthogonal beam connection part 402, and the through hole 405 provided in the web straddling part 400, and the bottom part A through hole 406 provided in 403 is fixed to the truss 1000 and the shaft assembly 1007 by bolting.
[0089]
The eaves beam connecting portions 401 projecting on both sides of the eaves beam installation metal fitting 404 form an angle of approximately 90 ° with both the web straddling portion 400 and the bottom portion 403. As shown in FIG. A web 1008 of an eaves beam 1001 made of H-shaped steel is brought into contact with the beam connection part 401 and is fixed by bolting in a through-hole 407 provided in the eaves beam connection part 401 so that the eaves beam 1001 is aligned along the eaves edge. It is installed.
[0090]
The orthogonal beam connecting portion 402 is provided at an angle of approximately 90 ° with both the web straddling portion 400 and the bottom portion 403, and the eaves side surface is formed as a flat surface. Thereby, when the eaves end beam installation metal fitting 404 is installed, the flat surface of the orthogonal beam connecting portion 402 faces the eave end, and as shown in FIG. 42 and FIG. 43, this flat surface is orthogonal to H-shaped steel. By joining one end of the beam 1002 via the joining plate 1009 and fixing with bolts in the through-hole 408 provided in the orthogonal beam connecting portion 402, the orthogonal beam 1002 can be easily installed.
[0091]
In addition, when the extension beam 1010 is extended on the eaves side, it is necessary to newly install the eaves beam 1001 along the eaves on the side face of the existing house. In this case, the pretreatment of the truss eaves portion 1003, the arrangement of the eaves beam installation metal fitting 404, and the installation of the eaves beam 1001 are performed in the same procedure as in the installation of the orthogonal beam 1002, and as shown in FIG. The base portion 1011 of the lowered beam 1010 may be joined to the beam connecting portion 402 and fixed by bolting.
[0092]
Next, as shown in FIG. 36, the second embodiment of the installation of the eaves beam is to install the eaves beam 1001 on one side of the existing truss 1000 along the eaves of the side of the existing house. The eaves beam installation method in the case where it is necessary to install the orthogonal beam 1002 in the direction orthogonal to the eaves beam 1001 on the extension part side, and pre-processes the truss eaves part 1003 in the same procedure as in the first embodiment. 45 (a), the eaves beam installation metal fitting 414 having the web straddling part 410, the eaves beam connection part 411, the orthogonal beam connection part 412, and the bottom part 413, or FIG. 45 (b). The eaves end beam installation fitting 419 having the web straddling part 415, eaves end beam connection part 416, orthogonal beam connection part 417, and bottom part 418 as shown in FIG. The beam connecting portion 411 or 416 Respectively arranged to face, the eaves beam connecting portion 411 or 416 opposed, is performed by connecting the both end portions of the eaves beam 1001. This will be described in more detail below.
[0093]
The web straddling portion 410 and the web straddling portion 415 have the same shape as the web straddling portion 400 of the eaves end beam installation metal fitting 404 of the first embodiment, and a method of installing the truss 1000 at the end portion on the eaves end side. Is the same as in the first embodiment.
[0094]
The eaves beam connecting portion 411 provided on the right side of the eaves beam installation metal fitting 414 forms an angle of approximately 90 ° with both the web straddling portion 410 and the bottom portion 413. As shown in FIG. A web 1008 of an eaves beam 1001 made of H-shaped steel is brought into contact with the connection part 411, and is fixed by bolting in a through hole 420 provided in the eaves beam connection part 411, thereby installing the eaves beam 1001 along the eaves edge. is doing. Moreover, the eaves beam installation metal fitting 419 has the eaves beam connection part 416 in the left side part, The structure of the other than that and the connection method of the eaves beam connection metal 414 are the same as that of the eaves beam connection metal fitting 414. The two eaves beam installation metal fittings 414 and the eaves beam installation metal fittings 419 may be properly used according to the positional relationship between the truss 1000 and the newly added eaves beam installation metal 1001.
[0095]
The orthogonal beam connection part 412 and the orthogonal beam connection part 417 have the same shape as the orthogonal beam connection part 402 of the eaves beam installation metal fitting 404 of the first embodiment, and by the same procedure as in the first embodiment, The orthogonal beam 1002 or the lowered beam 1010 can be installed on the extension portion side.
[0096]
Next, as shown in FIG. 36, in the third embodiment of the installation of the eaves beam, eaves beams 1001 are installed on both sides of the existing truss 1000 along the eaves on the side of the existing house. And it is an eaves beam installation method when it is not necessary to install the orthogonal beam 1002 in a direction orthogonal to the eaves beam 1001 on the extension part side, and as shown in FIG. 48, a pair of left and right having an inclined portion 430, a lid member 432 having a reinforcing plate 431, an eaves beam connecting portion 433, an inclined portion 434, a web joint portion 435, and a bottom portion 436. An eaves end beam mounting bracket 438 having a blade member 437 is arranged at the end of the eaves side of the adjacent truss 1000 with the eaves end beam connecting portion 433 facing each other, and these facing each other. To the eaves beam connection part 433 It is performed by connecting the both end portions of the eaves beam 1001. This will be described in more detail below.
[0097]
In the case of the present embodiment, as pre-processing applied to the truss eaves front part 1003, as shown in FIG. This is because, in this embodiment, since it is not necessary to provide the orthogonal beam 1002 on the extension portion side, even if the truss eaves tip portion 1003 remains slightly protruding on the extension portion side, it does not get in the way. Of course, in this case, pre-processing may be performed according to the procedure of the first embodiment, and the eaves beam installation metal fitting 404 may be installed. However, as in this embodiment, the pre-processing is simplified and the eaves beam installation metal fitting 404 is installed. The use of 438 has the advantage that the work efficiency can be improved.
[0098]
The blade member 437 shown in FIG. 48 has an eaves end beam connecting portion 433 extending to one side thereof, and the eave end beam connecting portion 433 forms an angle of approximately 90 ° with both the bottom portion 436 and the web joint portion 435. ing. When connecting the eaves beam 1001, as shown in FIG. 49, the web 1008 of the eaves beam 1001 that is H-shaped steel is brought into contact with the eaves beam connection part 433, and the through hole 439 provided in the eaves beam connection part 433 is used. By fixing by bolting, the eaves beam 1001 is installed along the eaves.
[0099]
The lid member 432 plays a role of connecting and integrating the blade members 437 at the upper portion thereof, and is provided to prevent the blade member 437 from wobbling or falling off due to an external force. Further, as shown in FIG. 48, in order to reinforce the structural weakness of the lid member 432, a reinforcing plate 431 is provided therein.
[0100]
The inclined portion 434 of the blade member 437 and the inclined portion 430 of the lid member 432 have the same inclination angle. As shown in FIG. 51, both are joined, and the blade member 437 and the lid member 432 are joined by bolting. It is fixed. In the case of this embodiment, this inclination angle is made equal to the inclination angle of the truss eave portion 1003. Thereby, it is possible to arrange the blade member 437 well in the side portion of the truss 1000 on the eaves side.
[0101]
When installing the eaves-end beam mounting bracket 438, as shown in FIGS. 50 and 51, first, each of the blade members 437 is joined to the end of the eaves side of the truss 1000 and the bottom 436 is joined to the flange 1012 of the truss 1000, Further, the web joining portion 435 is disposed so as to join the web 1006 of the truss 1000, and is fixed by bolting in a through hole 440 provided in the bottom portion 436. Next, the lid member 432 is covered from above the truss eaves tip 1003, and each inclined portion 430 of the lid member 432 is joined to the inclined portion 434 of each blade member 437. Furthermore, the position of the through hole 441 provided in the inclined portion 430 of the lid member 432 and the position of the through hole 442 provided in the inclined portion 434 of each blade member 437 may be aligned and then fixed by bolting.
[0102]
In the present embodiment, the case where the eaves beam 1001 is installed on both sides of the truss 1000 along the eaves on the side surface of the girder is described, but the case where the eaves beam 1001 is installed only on one side of the truss 1000 is also described. The eaves beam installation metal fitting 438 may be installed in the same procedure, and either one of the eaves beam connection portions 433 of the blade member 437 may be left unused. In this case, if only one blade member 437 is installed, the lid member 432 may not be stable, and wobbling, dropping off, etc. may occur. Therefore, it is preferable that the blade member 437 is always used in a state where a pair of left and right are aligned. .
[0103]
In any of the three embodiments described above, when the eaves beam 1001 is installed, as shown in FIG. 52, between the truss 1000 and the truss 1000, between the truss 1000 and the corner wooden beam 1013, and between the truss 1000 and the climbing beam 1014 Or between the climbing beam 1014 and the corner wooden beam 1013, and whether the metal fitting to be installed at the end of the eaves side of the truss 1000 is of any of the first to third embodiments Therefore, it is necessary to appropriately change the longitudinal dimension of the eaves beam 1001 and the shape of the end portion.
[0104]
In particular, when there is an existing corner wood beam 1013 on one end side of the eaves beam 1001, by providing a corner wood beam connection beam 450 at the end of the eaves beam 1001 on the corner wood beam 1013 side, the eaves beam 1001 becomes the corner wood beam 1013. Preventing contact.
[0105]
As shown in FIG. 53, the corner beam connecting beam 450 is fixed to the vertical plate 451, the upper edge of the vertical plate 451, the upper surface plate 452 orthogonal to the vertical plate 451, and the lower edge of the vertical plate 451. A bottom plate 453 orthogonal to the vertical plate 451, a box portion 454 having a substantially rectangular parallelepiped shape fixed on the bottom plate 453 and having a hollow inside, and a reinforcing plate 455 provided inside the box portion 454. As shown in FIG. 55, the end portions of the top plate 452, the bottom plate 453, and the vertical plate 451 are fixed to the eaves beam 1001 through the joining plate 1015 and provided on the bottom surface of the box portion 454. The through hole 456 is fixed to the shaft set 1007 by bolting.
[0106]
The top plate 452 and the vertical plate 451 have a shape in which a part of a substantially rectangular flat plate is cut off obliquely. Thereby, the upper surface plate 452 and the vertical plate 451 are prevented from coming into contact with the corner tree beam 1013 extending from the diagonally upper side to the diagonally lower side of the corner tree beam connecting beam 450.
[0107]
In the connecting portion between the corner wooden beam 1013 and the corner wooden beam connecting beam 450, when it is necessary to extend by providing the lowering beam 1010 on the extension portion side, as shown in FIG. 54, on the side of the extension portion side of the box portion 454, The base portion 1011 of the rolled-down beam 1010 may be joined and fixed by bolting in the through hole 457 provided on the side surface of the extension portion side of the box portion 454. Further, when the hanging beam 1010 is not connected, the side surface of the extension portion side of the box portion 454 does not need to be a flat surface, and the shape of the box portion 454 is not limited to a hollow substantially rectangular parallelepiped, and other shapes. It doesn't matter.
[0108]
In addition, as shown in FIG. 52, when one end of the eaves beam 1001 needs to be connected to the climbing beam 1014, the existing climbing beam connection fitting 1016 may be used.
[0109]
【The invention's effect】
As explained above, according to the extension construction method of the hut assembly according to claim 1 of the present invention, the extension ridge of the existing large ridge can be removed from the end of the existing ridge without completely dismantling the existing hut assembly of the existing residence. There is an advantage that the corner beam can be extended toward the end of the new large building, and the climbing beam in the middle of the existing large building can be extended toward the end of the new large building.
[0110]
Moreover, since the existing hut assembly is not completely dismantled, there is an advantage that not only the construction period can be shortened but also the workability can be improved while reducing labor.
[0111]
Furthermore, since each member is connected by fastening with a fastener, not only the workability can be improved, but also there is an advantage that sufficient safety can be ensured as compared with welding joining.
[0112]
Furthermore, since the existing cabin is not completely dismantled, there is an advantage that not only the amount of industrial waste generated can be reduced, but also the cost for transporting and processing the waste can be reduced. .
[0113]
And the shortening of a construction period shortens the period which inconveniences a customer, and there exists an advantage that a customer's burden can be reduced.
[0114]
According to the extension construction method of the hut assembly according to claim 2, in addition to the advantage of claim 1, the existing hut assembly and the extension shed assembly are completely dismantled without completely dismantling the existing hut assembly of the existing house. There is an advantage that the climbing beam can be installed toward the new corner wooden beam from the intersection where the valley portion generated at the boundary of the existing beam and the existing climbing beam on the extension portion side intersect.
[0115]
According to the extension construction method of a roof set according to claim 3, it is an extension work to the side of the girder of the house in which the truss eaves portion is extended obliquely downward from one end of the truss of the roof set. When it is necessary to add a new eaves beam along the eaves's eaves, the eaves side of the truss eaves side of the girder side where the eaves beam of the existing house is added is cut off, and the eaves end of the adjacent truss By arranging the eaves beam installation brackets facing each other at the eaves beam connection part that protrudes, and connecting both ends of the eaves beam to these opposite eaves beam connection parts, There is an advantage that the eaves beam can be easily installed without completely dismantling the hut assembly or the eaves.
[0116]
In addition, since it is not necessary to completely dismantle sheds and eaves of existing houses, labor can be saved and the construction period can be greatly shortened. Conventionally, it has been treated as industrial waste. There is an advantage that the cost required for processing can be reduced by eliminating unnecessary trusses generated during dismantling.
[0117]
According to invention of Claim 4, it is an extension work to the girder side of the house in which the truss eaves tip part was extended diagonally downward from one end side of the truss of the roof group, and the eaves beam along the eaves side of the girder side of the existing house When it is necessary to newly add a truss eave part on the side of the girder to which the eaves beam of the existing house is added, the end of the adjacent truss eaves side straddles the web straddling the web of the truss And the eaves beam connection metal fittings having the eaves beam connection part projecting in a direction perpendicular to the web straddling part, the eaves beam connection parts are arranged opposite to each other, and the eaves beam connection parts facing each other In addition, by connecting both ends of the eaves beam, there is an advantage that the eaves beam can be easily installed without completely dismantling the hut set, the back of the eaves, etc. of the existing house.
[0118]
In addition, since it is not necessary to completely dismantle sheds and eaves of existing houses, labor can be saved and the construction period can be greatly shortened. Conventionally, it has been treated as industrial waste. There is an advantage that the cost required for processing can be reduced by eliminating unnecessary trusses generated during dismantling.
[0119]
That is, according to the extension construction method of the hut assembly of the present invention, there is an advantage that labor saving of construction, cost reduction, and reduction of waste can be achieved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of an entire cabin set according to an embodiment of the present invention.
FIG. 2 is a side view showing a cabin set including a new corner beam.
FIG. 3 is an enlarged view of part A of FIG.
FIG. 4 is an explanatory diagram showing a connection procedure between a corner wooden beam installation bracket and a new corner wooden beam.
FIG. 5 is a plan view showing a procedure for fixing the corner wooden beam installation bracket to the top purlin receptacle.
6 is a plan view of FIG. 3. FIG.
FIG. 7 is a side view showing a hut assembly including a new corner beam in a Japanese hut assembly.
FIG. 8 is a side view showing a cabin set including a new climbing beam.
FIG. 9 is a perspective view showing a climbing beam extension fitting.
FIG. 10 is an enlarged view of part B of FIG.
11 is a plan view of FIG.
FIG. 12 is a perspective view showing a new climbing beam bundle and climbing beam bundle connection fittings.
13 is an enlarged view of part C of FIG. 8. FIG.
14 is a plan view of FIG. 13;
FIG. 15 is an explanatory diagram showing a procedure for connecting the climbing beam extension fitting to the top purlin receptacle.
FIG. 16 is an explanatory diagram showing a procedure for fixing the climbing beam bundle connection fitting to the existing climbing beam on the extension portion side in the portion D of FIG. 14;
FIG. 17 is an explanatory view showing a procedure for fixing the climbing beam bundle connecting bracket to the existing climbing beam on the extension portion side.
FIG. 18 is a side view showing a climbing beam bundle connecting bracket according to another embodiment.
FIG. 19 is a plan view showing a climbing beam bundle connecting bracket according to another embodiment.
FIG. 20 is a side view showing a climbing beam bundle connecting bracket according to another embodiment.
FIG. 21 is a side view showing a hut assembly including a new climbing beam in a Japanese hut assembly.
FIG. 22 is a side view showing a cabin set including an intersection.
FIG. 23 is a plan view showing an intersection.
FIG. 24 is a schematic perspective view showing a trough beam installation fitting.
FIG. 25 is a front view of an intersection showing a connection procedure for a new valley beam.
26 is a side view seen from the E side in FIG. 23, showing the procedure for fixing the trough and beam mounting bracket to the intersection.
FIG. 27 is a plan view of an intersection showing a connection procedure for a new valley beam.
28 is a side view of the intersection as viewed from the E side in FIG. 23. FIG.
29 is a side view of the intersection as viewed from the F side in FIG. 23. FIG.
30 is a side view of the valley beam mounting bracket according to another embodiment, as viewed from the E side in FIG. 23. FIG.
FIG. 31 is a side view showing a cabin set including an intersection in a Japanese cabin set.
FIG. 32 is a schematic plan view showing a cabin set in which a new climbing beam is installed.
FIG. 33 is a schematic perspective view showing a trough beam installation fitting.
FIG. 34 is a plan view showing an intersection.
35 is a side view of the intersection as viewed from the G side in FIG. 34. FIG.
FIG. 36 is a plan view showing the outline of the entire cabin set according to the embodiment of the present invention.
FIG. 37 is an explanatory diagram for explaining the flow of pre-processing to the truss eaves part.
FIG. 38 is an explanatory diagram for explaining pre-processing for the truss eaves portion for each procedure;
FIG. 39 is an explanatory diagram for explaining pre-processing for the truss eaves front part for each procedure;
FIG. 40 is a schematic perspective view of the eaves beam installation metal fitting.
FIG. 41 is a schematic perspective view for explaining a method of installing the eaves beam installation metal fitting.
FIG. 42 is a schematic side view showing an installation state of the eaves beam installation metal fitting.
FIG. 43 is a schematic plan view showing a connection portion between the eaves beam installation fitting and the eaves beam.
FIG. 44 is a schematic side view showing a connection portion between an eaves-end beam installation bracket and a hanging beam.
FIG. 45 is a schematic perspective view of the eaves beam installation metal fitting.
FIG. 46 is a schematic plan view showing a connecting portion between the eaves beam installation metal fitting and the eaves beam.
FIG. 47 is an explanatory diagram for explaining preprocessing for a truss eaves front portion.
FIG. 48 is a schematic perspective view of the eaves beam installation metal fitting.
FIG. 49 is a schematic plan view showing a connection portion between the eaves beam installation metal fitting and the eaves beam.
FIG. 50 is a schematic perspective view for explaining a method of installing the eaves beam installation metal fitting.
FIG. 51 is a schematic side view showing an installation state of the eaves beam installation metal fitting.
FIG. 52 is a schematic plan view for explaining a connecting portion of a truss, a corner wooden beam, a climbing beam, and an eaves beam.
FIG. 53 is a schematic perspective view of a corner wooden beam connecting beam.
FIG. 54 is a schematic plan view showing a joint portion between a corner-timber beam-joining beam and a hanging beam.
FIG. 55 is a schematic perspective view showing a joint portion between a corner wooden beam and a corner wooden beam.
[Explanation of symbols]
8 Existing climbing beams
100 New corner beam
200 New climbing beam
250 New bunches
300 New trough
301 Intersection
303 1st new valley beam
306 Second New Valley Tree Beam

Claims

This is a method of building a hut in the extension work when the height of the extension part is higher than the height of the existing house in the middle part of the girder face of the existing house, which is a vertical member under the middle part of the existing large building A top purlin support connecting portion installed at a top purlin support installed at the upper end of the corner and a corner wooden beam connecting portion rising from one end side of the top purlin receiving connection portion at an angle substantially equal to the rising angle of the existing corner wooden beam Using a corner wooden beam installation bracket, connecting one end of the new corner wooden beam to the corner wooden beam connecting portion, and installing the new corner wooden beam in the middle of the large building, from the middle of the existing large building to the new large building Install a corner wooden beam toward the end of the
A flat part installed at the top of the vertical member in the middle part of the existing large building, a top purlin receiving connection part installed in the top purlin receiver installed at the upper end part of the vertical member, and one of the purlin receiving connection parts Using a climbing beam extension bracket having a climbing beam connecting part rising from a side central part with a rising angle substantially equal to the rising angle of the existing climbing beam, connecting one end of the new climbing beam to the climbing beam connecting part, While fixing the flat portion to the top of the vertical member and fixing the top purlin support connection portion to the top purlin support, installing one end of the new climbing beam on the extension of the existing climbing beam, Using the new climbing beam bundle having the climbing beam bundle connecting bracket installed on the existing climbing beam on the extension part side at the lower end and the new climbing beam connecting part connecting to the new climbing beam at the upper end, the climbing beam bundle connection Fix the bracket to the existing climbing beam and By connecting the climbing beam bundle connecting portion to the new climbing beam and vertically standing the new climbing beam bundle between the new climbing beam and the existing climbing beam on the extension side, Extend the climbing beam in the middle toward the end of the new building,
At the intersection where the valley that occurs at the boundary between the existing hut assembly and the hut assembly of the extension section intersects the existing climbing beam on the extension section side, an installation section that is installed at the intersection section, and a main building receiver near the intersection section A purlin support connecting part installed in the purlin support installed in the first part, a first valley wooden beam installation part rising from one side of the installation part at a rising angle substantially equal to a rising angle of the existing corner wooden beam, and the other side of the installation part Using a trough beam mounting bracket having a second trough beam connecting portion installed on an extension of the first trough beam connecting portion, connecting an end of the first new trough beam beam to the first trough beam connecting portion, By connecting the end of the first new valley beam and the end of the second new valley beam in a substantially straight line at the intersection. Extension of a hut set, characterized by the installation of valley beams Law.

A climbing beam connecting portion that rises from one side of the installation portion at a rising angle substantially equal to the rising angle of the existing climbing beam is installed on the installation portion of the valley beam mounting bracket, and one end portion of the new climbing beam is attached to the climbing beam connecting portion. The building construction method according to claim 1, wherein climbing beams are installed from the intersections toward the new corner wooden beams by connecting.

An eaves beam installation method that adds a new eaves beam along the eaves on the side of the girder side of the existing house in the extension work on the side of the girder side of the house with the truss eaves extending diagonally downward from one end of the truss However, the eaves side of the truss eaves on the side of the girder where the eaves beam of the existing house is added is cut off, and the projecting eaves beam connection part is opposed to the end of the adjacent truss eaves The eaves building installation metal fitting according to claim 1 or 2, wherein the eaves beam installation metal fittings are respectively disposed, and both ends of the eaves beam are connected to the opposing eaves beam connection portions. Law.

An eaves beam installation method that adds a new eaves beam along the eaves on the side of the girder side of the existing house in the extension work on the side of the girder side of the house with the truss eaves extending diagonally downward from one end of the truss The truss eaves part on the side of the girder to which the eaves beam of the existing house is added is cut, and the web straddling part straddling the web of the truss at the end part on the eaves side of the adjacent truss, and the web straddling part The eaves beam connection metal fittings having eaves beam connection portions projecting in a direction perpendicular to the eaves beam connection portions are arranged so that the eaves beam connection portions face each other. The extension construction method of the hut assembly according to claim 1 or 2, characterized by connecting the two.