JP3877061B2

JP3877061B2 - Extension construction method of hut assembly

Info

Publication number: JP3877061B2
Application number: JP2002188926A
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: 2007-02-07
Anticipated expiration: 2022-06-28
Also published as: JP2004027746A

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に、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。
【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一部に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】
前記技術課題を解決するための具体的手段は、次のようなものである。すなわち、請求項１に記載する小屋組の増築施工法は、寄棟造りの既存住宅の桁面の一部分に、既存住宅の既存小屋組の一部と増築部の新規小屋組の一部とを略同一面に、かつ、増築部の棟を既存住宅の棟と同じ高さに増築する際の増築工事における小屋組の増築施工法であって、既存住宅と増築部の境界に位置する既存隅木梁に設置された母屋受け金具に設置される母屋受け接続部と該母屋受け接続部と略９０°をなす母屋接続部とを有する母屋延長金具を用い、前記母屋受け金具に前記母屋受け接続部を固定し、増築部の新規母屋を前記母屋受け金具に設置された既存母屋の延長上に設置することにより、既存住宅の増築部側の母屋の設置方向を略９０°変更して、前記増築部の新規母屋を前記既存母屋と略同一面に配置し、既存大棟の端部下の既存寄棟束の頂部近傍に設置された母屋受けに、谷木梁接続金具の基部を固定し、該基部と略４５°の角度をなす方向に突設された前記谷木梁接続金具の谷木梁取付け部に、既存住宅と増築部の境界に生じる谷部に沿って設置する新規谷木梁の上端部を固定することにより、前記新規谷木梁の上端部を前記既存大棟の端部に接続することを特徴としている。
【００１０】
請求項２に記載する小屋組の増築施工法は、請求項１に記載する小屋組の増築施工法において、前記既存住宅の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設置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、既存住宅の桁側面の軒先に沿って軒先梁を新たに追加することを特徴としている。
【００１１】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。図１に示すように、本発明の実施形態に係る小屋組増築工法は、既存住宅の桁面の一部に増築する場合であって、増築部と既存住宅の小屋組の一部が同一面にあり、且つ増築部の棟の高さが、既存住宅の棟の高さと同じである場合の小屋組の増築施工法であり、この場合、第１に、既存住宅の増築部側の母屋の方向を、略９０°変更して、増築部側の母屋を、これと略９０°をなす既存住宅の母屋２、２１、４３、及び６５と同一面に、かつ、その延長線上に配置し、第２に、既存住宅の桁側面の軒先に沿って新規な軒先梁８４を追加し、第３に、既存住宅と増築部の境界に発生する谷部に沿って設置する新規谷木梁１２７の上端部を既存住宅の既存大棟１２８の端部に接続することが必要となる。以下、それぞれについて、更に詳細に説明する。
【００１２】
第１に、図１に示すように、既存住宅の増築部側の母屋の設置方向を略９０°変更して増築部の新規母屋を既存住宅の既存母屋と略同一面に配置する。まず、増築部の新規軒先母屋１を既存住宅の既存軒先母屋２と略同一面に配置する。具体的には、図２に示すように、既存住宅と増築部の境界に位置する既存隅木梁３（図示せず）の軒先部に設けられた既存軒先梁４の先端に設置された軒先母屋受け金具５に軒先母屋延長金具６を固定し、該軒先母屋延長金具６に新規軒先母屋１の端部７を接続することにより、新規軒先母屋１を既存軒先母屋２の延長上に設置する。なお、本各実施の形態に示す既存隅木梁３及び既存軒先梁４は、図３に示す既存隅木梁３と同様の構成であって、２本のＣ型鋼をボルト締めで締結したものであって、既存大棟の端部から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)。
【００１３】
既存軒先母屋２は、図３に示すように、先端を所定の形状に形成した長尺の木角材であり、端部を既存軒先梁４の先端に設けられた軒先母屋受け金具５にボルトナットから構成される締結具８で締結して固定されることにより既存軒先梁４に設置されている（図１参照）。
【００１４】
軒先母屋受け金具５は、図３に示すように、中央部で略９０°の角度をなして折れ曲がり、両端部に貫通孔９が穿設された山形プレート１０と、該山形プレート１０の折曲部１１の入隅に一方の縁辺が固着された略長方形の接続プレート１２とを有している。軒先母屋受け金具５の既存軒先梁４への固定は、接続プレート１２の他方を既存軒先梁４の先端から、既存軒先梁４の２本のＣ型鋼の間に挿入し、接続プレート１２の他方を既存軒先梁４の先端にボルト締めで固定することにより行う。
【００１５】
既存軒先母屋２の軒先母屋受け金具５への固定は、図２に示すように、既存軒先母屋２の先端と増築部側の既存軒先母屋１３の先端とが略合致するように、軒先母屋受け金具５の山形プレート１０の両外側面に既存軒先母屋２の端部と増築部側の既存軒先母屋１３の端部とをそれぞれあてがい、締結具８で締結して固定することにより行う。これにより、既存軒先母屋２と増築部側の既存軒先母屋１３とが同一面に、かつ、略９０°の角度をなして既存軒先梁４の先端部に配置される。
【００１６】
新規軒先母屋１は、図３に示す既存軒先母屋２と同様に、先端を所定の形状に形成した長尺の木角材であって、端部７には貫通孔１４が穿設されている（図５参照）。
【００１７】
軒先母屋延長金具６は、図３に示すように、両端部に貫通孔１５、１６が穿設された１枚のプレートを中央部で捻るようにして略９０°の角度をなすように折り曲げて形成し、その一方を軒先母屋受け接続部１７、その他方を軒先母屋接続部１８としたものである。
【００１８】
軒先母屋延長金具６の軒先母屋受け金具５への固定は、図４に示すように、軒先母屋受け金具５の山形プレート１０の増築部側の側面に軒先母屋延長金具６の軒先母屋受け接続部１７の側面を軒先母屋受け金具５の折曲部１１と軒先母屋延長金具６の折曲部１９とが略合致するようにあてがい、軒先母屋受け金具５の山形プレート１０の貫通孔９と軒先母屋延長金具６の軒先母屋受け接続部１７の貫通孔１５とを締結具８で締結することにより行う。これにより、図４に示すように、軒先母屋延長金具６の軒先母屋接続部１８と軒先母屋受け金具５の山形プレート１０の既存軒先母屋２側の側面とが略同一面に、かつ、一直線上に配置される。
【００１９】
新規軒先母屋１の端部７の軒先母屋延長金具６への接続は、図５に示すように、軒先母屋延長金具６を軒先母屋受け金具５に固定した後、既存軒先母屋２の先端と新規軒先母屋１の先端とが略合致するように、軒先母屋延長金具６の軒先母屋接続部１８に新規軒先母屋１の端部７をあてがい、該新規軒先母屋１の端部７の貫通孔１４と軒先母屋延長金具６の軒先母屋接続部１８の貫通孔１６とを締結具８で締結することにより行う。これにより、図２に示すように、新規軒先母屋１が既存軒先母屋２の延長上に設置される。
【００２０】
以上により、図１に示すように、既存住宅の増築部側の母屋の設置方向が略９０°変更されて、新規軒先母屋１が既存軒先母屋２と同一面に配置される、即ち、既存軒先母屋２が増築部側へ延長されたこととなる。
【００２１】
次に、図１に示すように、増築部の新規第１母屋２０を既存住宅の既存第１母屋２１と同一面に配置する。具体的には、図６に示すように、既存軒先梁４の既存隅木梁３（図示せず）の方の端部に設置された第１母屋受け金具２２に第１母屋延長金具２３を固定し、該第１母屋延長金具２３に新規第１母屋２０の端部２４を接続することにより、新規第１母屋２０を既存第１母屋２１の延長上に設置することにより行う。新規第１母屋２０は、長尺の木角材であって、端部２４には貫通孔２５が穿設されている（図１０参照）。
【００２２】
既存第１母屋２１は、既存軒先母屋２と同様の構成であって、図６に示すように、端部を既存軒先梁４の所定位置に設けられた第１母屋受け金具２２に締結具８で締結して固定されることにより、既存軒先母屋２の１段上に設置されている（図１参照）。
【００２３】
第１母屋受け金具２２は、図７に示すように、斜辺が長辺に対して略４５°の角度をなす略台形の平部２６と、該平部２６の長辺から略９０°の角度をなして上向きに立ち上がり、端部に貫通孔２７が穿設された第１母屋受け部２８とを有している。第１母屋受け金具２２の既存軒先梁４への固定は溶接により行われ、２個の第１母屋受け金具２２は、各第１母屋受け部２８が既存軒先梁４の長軸線Ｌに対して対称となるように、即ち、第１母屋受け部２８どうしが略９０°の角度をなすように、既存軒先梁４の両側面に設けられている。
【００２４】
既存第１母屋２１の第１母屋受け金具２２への固定は、図６に示すように、
既存第１母屋２１の先端を既存軒先梁４の増築部側面に当接させ、既存第１母屋２１の端部を第１母屋受け金具２２の平部２６に載置し、第１母屋受け金具２２の第１母屋受け部２８に締結具８で締結することにより行う。これにより、既存第１母屋２１と増築部側の既存第１母屋２９とが同一面に、かつ、略９０°の角度をなして既存軒先梁４に配置される。
【００２５】
第１母屋延長金具２３は、図８に示すように、斜辺が長辺に対して略４５°の角度をなす略台形の蓋部３０と、該蓋部３０の短辺から略９０°の角度をなして下向きに垂れ下がり、下隅角部に貫通孔３１が穿設された第１母屋受け接続部３２とを有する第１母屋受け接続部材３３と、斜辺が長辺に対して略４５°の角度をなす略台形の底部３４と、該底部３４の短辺から略９０°の角度をなして上向きに立ち上がり、上隅角部に貫通孔３５が穿設された第１母屋接続部３６とを有する第１母屋接続部材３７と、略長方形の添え部３８と、蓋部３０の斜辺と対向する縁辺及び第１母屋受け接続部３２の縁辺に固着された略長方形の補強部３９とを有しており、添え部３８の表面に底部３４の斜辺及び第１母屋接続部３６の縁辺及び蓋部３０の斜辺を固着することにより形成したものである。
【００２６】
第１母屋延長金具２３の増築部側の第１母屋受け金具２２への固定は、図９に示すように、第１母屋延長金具２３の第１母屋受け接続部材３３を第１母屋受け金具２２の第１母屋受け部２８に上方から被せて、第１母屋受け金具２２の第１母屋受け部２８の平部２６側面に第１母屋延長金具２３の第１母屋受け接続部材３３の第１母屋受け接続部３２をあてがうとともに、既存軒先梁４の増築部側面に第１母屋延長金具２３の添え部３８の裏面をあてがい、第１母屋受け金具２２の第１母屋受け部２８に第１母屋延長金具２３の第１母屋受け接続部３２を締結具（図示せず）で締結して固定することにより行う。
【００２７】
このとき、第１母屋延長金具２３の第１母屋受け接続部材３３の折曲部の長さを、第１母屋受け金具２２の第１母屋受け部２８の上縁辺と略等しくしておくと、第１母屋延長金具２３を第１母屋受け金具２２に固定したときに、第１母屋延長金具２３の第１母屋受け接続部材３３が、既存軒先梁４と第１母屋延長金具２３の補強部３９とで挟まれた状態となるので、第１母屋延長金具２３を第１母屋受け金具２２に安定良く設置することができる(図１０参照)。
【００２８】
これにより、図１０に示すように、第１母屋延長金具２３の第１母屋接続部材３７の折曲部４０は、既存第１母屋２１の方の第１母屋受け金具２２の折曲部４１と略同一面に、かつ、その延長線上に配置される。
【００２９】
新規第１母屋２０の端部２４の第１母屋延長金具２３への接続は、図１０に示すように、第１母屋延長金具２３を第１母屋受け金具２２に固定した後、第１母屋延長金具２３の第１母屋接続部材３７に新規第１母屋２０の端部２４を載置し、該新規第１母屋２０の端部２４の貫通孔２５と第１母屋延長金具２３の第１母屋接続部３６の貫通孔３５とを締結具８で締結することにより行う。これにより、図６に示すように、新規第１母屋２０が既存第１母屋２１の延長上に設置される。
【００３０】
以上により、図１に示すように、既存住宅の増築部側の母屋の設置方向が略９０°変更されて、新規第１母屋２０が既存第１母屋２１と同一面に配置される、即ち、既存第１母屋２１が増築部側へ延長されたこととなる。
【００３１】
次に、図１に示すように、増築部の新規第２母屋４２を既存住宅の既存第２母屋４３と同一面に配置する。具体的には、図１１に示すように、既存隅木梁３と既存軒先梁４との接続部近傍に設置された第２母屋受け金具４４に第２母屋延長金具４５を固定し、該第２母屋延長金具４５に新規第２母屋４２の端部４６を接続することにより、新規第２母屋４２を既存第２母屋４３の延長上に設置する。新規第２母屋４２は、長尺の木角材であって、端部４６には貫通孔４７が穿設されている（図１５参照）。
【００３２】
既存第２母屋４３は、既存軒先母屋２及び既存第１母屋２１と同様の構成であって、図１１に示すように、端部を既存隅木梁３の既存軒先梁４との接続部近傍に設けられた第２母屋受け金具４４に締結具８で締結して固定されることにより、既存軒先母屋２の２段上に設置されている（図１参照）。
【００３３】
第２母屋受け金具４４は、図１２に示すように、互いに略９０°をなす２つの縁辺を有する略六角形の平部４８と、該各平部４８の縁辺からそれぞれ略９０°をなして上向きに立ち上がり、上端部に貫通孔４９が穿設された第２母屋受け部５０とを有している。第２母屋受け金具４４の既存隅木梁３への固定は溶接により行われ、第２母屋受け金具４４の２個の第２母屋受け部５０が互いに既存隅木梁３の長軸線Ｌに対して対称となるように既存隅木梁３の上面に設けられている。
【００３４】
既存第２母屋４３の第２母屋受け金具４４への固定は、図１１に示すように、、既存第２母屋４３の先端と増築部側の既存第２母屋５１の先端とが略合致するように、既存第２母屋４３の端部及び増築部側の既存第２母屋５１の端部をそれぞれ第２母屋受け金具４４の平部４８に載置するとともに、各第２母屋受け部５０に締結具８で締結して固定することにより行う。これにより、既存第２母屋４３と増築部側の既存第２母屋５１とが同一面に、かつ、略９０°の角度をなして既存隅木梁３に配置される。
【００３５】
第２母屋延長金具４５は、図１３に示すように、第２の実施形態の第１母屋延長金具２３と同様の構成であり、蓋部５２と貫通孔５３が穿設された第２母屋受け接続部５４とを有する第２母屋受け接続部材５５と、底部５６と貫通孔５７が穿設された第２母屋接続部５８とを有する第２母屋接続部材５９と、添え部６０と、補強部６１とを有しており、添え部６０の表面に底部５６の斜辺、第２母屋接続部５８の縁辺及び蓋部５２の斜辺を固着することにより形成したものである。
【００３６】
第２母屋延長金具４５の第２母屋受け金具４４への固定においても、図１４に示すように、第２の実施形態と同様であり、第２母屋延長金具４５の第２母屋受け接続部材５５を第２母屋受け金具４４の第２母屋受け部５０に上方から被せて、第２母屋受け金具４４の第２母屋受け部５０に第２母屋延長金具４５の第２母屋受け接続部５４を締結具（図示せず）で締結して固定することにより行う。
【００３７】
このとき、第２母屋延長金具４５の第２母屋受け接続部材５５の折曲部の長さを、第２母屋延長金具４５を第２母屋受け金具４４に固定したときの添え部６０から第２母屋受け部５０の既存隅木梁３と対向する縁辺までの距離と略等しくしておくと、第２母屋延長金具４５を第２母屋受け金具４４に固定したときに、第２母屋延長金具４５の第２母屋受け接続部材５５が、第２母屋延長金具４５の添え部６０と補強部６１とで挟まれた状態となるので、第２母屋延長金具４５を第２母屋受け金具４４に安定良く設置することができる(図１５参照)。
【００３８】
これにより、図１５に示すように、第２母屋延長金具４５の第２母屋接続部材５９の折曲部６２が既存第２母屋４３の方の折曲部６３と略同一面に、かつ、その延長線上に配置される。
【００３９】
新規第２母屋４２の端部４６の第２母屋延長金具４５への接続は、図１５に示すように、第２母屋延長金具４５を第２母屋受け金具４４に固定した後、第２母屋延長金具４５の第２母屋接続部材５９に新規第２母屋４２の端部４６を載置し、該新規第２母屋４２の端部４６の貫通孔４７と第２母屋延長金具４５の第２母屋接続部５８の貫通孔５７とを締結具８で締結することにより行う。これにより、図１１に示すように、新規第２母屋４２が既存第２母屋４３の延長上に設置される。
【００４０】
以上により、図１に示すように、既存住宅の増築部側の母屋の設置方向が略９０°変更されて、新規第２母屋４２が既存第２母屋４３と同一面に配置される、即ち、既存第２母屋４３が増築部側へ延長されたこととなる。
【００４１】
次に、図１に示すように、増築部の新規一般母屋６４を既存住宅の既存一般母屋６５と同一面に配置する。具体的には、図１６に示すように、既存隅木梁３に設置された一般母屋受け金具６６に一般母屋延長金具６７を固定し、該一般母屋延長金具６７に新規一般母屋６４の端部６８を接続することにより、新規一般母屋６４を既存一般母屋６５の延長上に設置する。なお、新規一般母屋６４は、長尺の木角材であって、端部６８には貫通孔６９が穿設されている（図２０参照）。
【００４２】
既存一般母屋６５は、既存軒先母屋２、既存第１母屋２１及び既存第２母屋４３と同様の構成であって、図１６に示すように、端部を既存隅木梁３に設けられた一般母屋受け金具６６に締結具８で締結して固定されることにより、既存軒先母屋２の３段以上に設置されている（図１参照）。
【００４３】
一般母屋受け金具６６は、図１７に示すように、第３の実施形態の第２母屋受け金具４４と同様の構成であり、互いに略９０°をなす２つの縁辺を有する略六角形の平部７０と、該各平部７０の縁辺からそれぞれ略９０°をなして上向きに立ち上がり、上端部に貫通孔７１が穿設された一般母屋受け部７２とを有している。一般母屋受け金具６６の既存隅木梁３への固定は溶接により行われ、一般母屋受け金具６６の２個の一般母屋受け部７２が互いに既存隅木梁３の長軸線Ｌに対して対称となるように既存隅木梁３の上面に設けられている。
【００４４】
既存一般母屋６５の一般母屋受け金具６６への固定も、図１６に示すように、第３の実施形態と同様に、既存一般母屋６５の端部及び増築部側の既存一般母屋７３の端部をそれぞれ一般母屋受け金具６６の平部７０に載置するとともに、各一般母屋受け部７２に締結具８で締結して固定することにより行う。これにより、既存一般母屋６５と増築部側の既存一般母屋７３とが同一面に、かつ、略９０°の角度をなして既存隅木梁３に配置される。
【００４５】
一般母屋延長金具６７は、図１８に示すように、斜辺が長辺に対して略４５°の角度をなし、上隅角部に貫通孔７４が穿設された略台形の一般母屋受け接続部７５と、略長方形状の底部７６と、該底部７６の長辺から略９０°の角度をなして上向きに立ち上がり、上隅角部に貫通孔７７が穿設された斜辺が長辺に対して略４５°の角度をなす略台形の一般母屋接続部７８とを有する一般母屋接続部材７９と、一般母屋受け接続部７５の斜辺と対向する縁辺に固着された補強部８０とを有しており、一般母屋受け接続部７５の斜辺と一般母屋接続部７８の斜辺とを略合致させて固着することにより形成したものである。
【００４６】
一般母屋延長金具６７の一般母屋受け金具６６への固定は、図１９に示すように、一般母屋受け金具６６の増築部側の一般母屋受け部７２の平部７０側面に一般母屋延長金具６７の一般母屋受け接続部７５をあてがい、一般母屋受け金具６６の一般母屋受け部７２に一般母屋延長金具６７の一般母屋受け接続部７５を締結具（図示せず）で締結して固定することにより行う。
【００４７】
このとき、一般母屋延長金具６７の一般母屋受け接続部７５の上縁辺の長さを、一般母屋延長金具６７を一般母屋受け金具６６に固定したときに、一般母屋受け接続部７５の斜辺が既存一般母屋６５の先端に当接する長さとしておくと、一般母屋延長金具６７の補強部８０に一般母屋受け金具６６の一般母屋受け部７２の既存隅木梁３と対向する縁辺が当接することとなり、一般母屋延長金具６７の一般母屋受け接続部７５が、既存一般母屋６５と一般母屋延長金具６７の補強部８０とで挟まれた状態となるので、一般母屋延長金具６７を一般母屋受け金具６６に安定良く設置することができる(図２０参照)。
【００４８】
これにより、図２０に示すように、一般母屋延長金具６７の一般母屋接続部材７９の折曲部８１が一般母屋受け金具６６の既存一般母屋６５の方の折曲部８２と略同一面に、かつ、その延長線上に配置される。
【００４９】
新規一般母屋６４の端部６８の一般母屋延長金具６７への接続は、図２０に示すように、一般母屋延長金具６７を一般母屋受け金具６６に固定した後、一般母屋延長金具６７の一般母屋接続部材７９に新規一般母屋６４の端部６８を載置し、該新規一般母屋６４の端部６８の貫通孔６９と一般母屋延長金具６７の一般母屋接続部７８の貫通孔７７とを締結具８で締結することにより行う。これにより、図１６に示すように、新規一般母屋６４が既存一般母屋６５の延長上に設置される。
【００５０】
以上により、図１に示すように、既存住宅の増築部側の母屋の設置方向が略９０°変更されて、新規一般母屋６４が既存一般母屋６５と同一面に配置される、即ち、既存一般母屋６５が増築部側へ延長されたこととなる。
【００５１】
第２に、既存住宅の桁側面の軒先に沿って、新たな軒先梁を追加する。軒先梁の設置の第１の実施形態は、図２１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８３の両側方に軒先梁８４を設置し、且つ、増築部側に該軒先梁８４と略直交する方向へ直交梁８５を設置する必要がある場合についてであり、図２２に示す手順で、トラス軒先部８６に前処理を施し、図２５に示すような、ウエブ跨ぎ部８７と、軒先梁接続部８８と、直交梁接続部８９と、底部９０を有する軒先梁設置金具９１を、相隣接するトラス８３の軒先側の端部に、軒先梁接続部８８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８８に、軒先梁８４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。
【００５２】
軒先梁設置金具９１をトラス８３の軒先側の端部に設置する際には、トラス軒先部８６、及びトラス８３の軒先側の端部に設けられたプレート９２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２２であり、各手順ごとの作業後の状態を表すのが図２３、及び図２４である。
【００５３】
手順１では、トラス軒先部８６を切除している。これは、トラス軒先部８６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２３（ａ)は、この手順の作業前の状態を、図２３（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。
【００５４】
手順２では、トラス８３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９２を取り除くために、該プレート９２とトラス８３との接合面に沿うように、トラス軒先部８６と共に、鉛直方向に切断している。このとき、プレート９２とトラス８３との溶接部を避け、プレート９２とトラス８３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２３（ｃ）は、この手順の作業後の状態を表している。
【００５５】
手順３では、トラス軒先部８６を、トラス８３のＣ型チャンネル９３先端部より若干軒先側において、トラス８３のウエブ９４に達するまで切断している。これは、軒先梁設置金具９１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２３（ｄ）は、この手順の作業後の状態を表している。
【００５６】
手順４では、プレート９２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９２をトラス８３から切り離している。ここで、図２４（ａ）は、この手順の作業後の状態を表している。
【００５７】
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８３の下部に残ったプレート９２の残片を取り除いている。これにより、軒先梁設置金具９１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２４（ｂ）は、この手順の作業後の状態を表している。
【００５８】
手順６では、軒先側からトラス８３のウエブ９４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８３とトラス軒先部８６との接合面を切断し、トラス軒先部８６の軒先側部を除去している。ここで、図２４（ｃ）は、この手順の作業後の状態を表している。
【００５９】
図２５に示す軒先梁設置金具９１の底部９０から鉛直方向に立ちあがる、左右１対のウエブ跨ぎ部８７は、トラス８３のウエブ９４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９１の設置に際しては、図２６及び図２７に示すように、ウエブ跨ぎ部８７が、前述のような前処理を施したトラス８３のウエブ９４の軒先側の端部を跨ぐように軒先梁設置金具９１をあてがい、トラス８３のウエブ９４の軒先側の端部が直交梁接続部８９に達するまで軒先梁設置金具９１を押し込むと共に、ウエブ跨ぎ部８７に設けた貫通孔９５、及び底部９０に設けた貫通孔９６において、ボルト締めでトラス８３、及び軸組９７に固定している。
【００６０】
軒先梁設置金具９１の両側部に突設された軒先梁接続部８８は、ウエブ跨ぎ部８７、及び底部９０の双方と略９０°の角度をなしており、図２８に示すように、該軒先梁接続部８８に、Ｈ型鋼である軒先梁８４のウエブ９８を当接させ、軒先梁接続部８８に設けられた貫通孔９９においてボルト締めで固定することにより、軒先梁８４を軒先に沿って設置している。
【００６１】
直交梁接続部８９は、ウエブ跨ぎ部８７、及び底部９０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９１を設置したときに、該直交梁接続部８９の平坦面が軒先に面し、図２７、及び図２８に示すように、この平坦面に、Ｈ型鋼である直交梁８５の一端部を、接合板１００を介して接合させ、直交梁接続部８９に設けられた貫通孔１０１においてボルト締めで固定することにより、直交梁８５を容易に設置することができる。
【００６２】
また、軒先側に葺き下ろし梁１０２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８４の新たな設置が必要となる。この場合、トラス軒先部８６の前処理、軒先梁設置金具９１の配設、及び軒先梁８４の設置については直交梁８５の設置の場合と同様の手順で行い、図２９に示すように、直交梁接続部８９に葺き下ろし梁１０２の基部１０３を接合させ、ボルト締めにより固定するとよい。
【００６３】
次に、軒先梁の設置の第２の実施形態は、図２１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８３の一側方に軒先梁８４を設置し、且つ、増築部側に該軒先梁８４と直交する方向へ直交梁８５を設置する必要がある場合についてであり、第１の実施形態と同様の手順でトラス軒先部８６に前処理を施し、図３０（ａ）に示すような、ウエブ跨ぎ部１０４と、軒先梁接続部１０５と、直交梁接続部１０６と、底部１０７を有する軒先梁設置金具１０８、又は、図３０（ｂ）に示すような、ウエブ跨ぎ部１０９と、軒先梁接続部１１０と、直交梁接続部１１１と、底部１１２を有する軒先梁設置金具１１３を、相隣接するトラス８３の軒先側の端部に、軒先梁接続部１０５、又は１１０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１０５又は１１０に、軒先梁８４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。
【００６４】
ウエブ跨ぎ部１０４、及びウエブ跨ぎ部１０９は、第１の実施形態の軒先梁設置金具９１のウエブ跨ぎ部８７と同様の形状を有しており、トラス８３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。
【００６５】
軒先梁設置金具１０８の右側部に設けられた軒先梁接続部１０５は、ウエブ跨ぎ部１０４、及び底部１０７の双方と略９０°の角度をなしており、図３１に示すように、該軒先梁接続部１０５に、Ｈ型鋼である軒先梁８４のウエブ９８を当接させ、軒先梁接続部１０５に設けられた貫通孔１１４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８４を設置している。また、軒先梁設置金具１１３は、その左側部に軒先梁接続部１１０を有しており、それ以外の構造、及び軒先梁８４の接続方法は軒先梁設置金具１０８と同様である。以上２つの軒先梁設置金具１０８と軒先梁設置金具１１３は、トラス８３と、新たに追加する軒先梁８４との位置関係に応じて使い分けるとよい。
【００６６】
直交梁接続部１０６、及び直交梁接続部１１１は、第１の実施形態の軒先梁設置金具９１の直交梁接続部８９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８５、又は葺き下ろし梁１０２を増築部側に設置することができる。
【００６７】
以上説明した２つの実施形態のいずれの場合についても、軒先梁８４の設置に際しては、図３２に示すように、トラス８３―トラス８３間、トラス８３―隅木梁１１５間、トラス８３―登り梁１１６間、あるいは登り梁１１６―隅木梁１１５間のいずれの場所に設置するのかにより、軒先梁８４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。特に、軒先梁８４の一端側に既存の隅木梁１１５がある場合には、軒先梁８４の隅木梁１１５側の端部に隅木梁接続梁１１７を設けることにより、軒先梁８４が隅木梁１１５に接触することを防止している。
【００６８】
隅木梁接続梁１１７は、図３３に示すように、垂直板１１８と、該垂直板１１８の上端縁に固定され、垂直板１１８と直交する上面板１１９と、垂直板１１８の下端縁に固定され、垂直板１１８と直交する底面板１２０と、該底面板１２０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１２１と、箱部１２１の内部に設けられた補強板１２２とを有しており、図３５に示すように、上面板１１９、底面板１２０、及び垂直板１１８の端部が接合板１２３を介して軒先梁８４に固定されると共に、箱部１２１の底面に設けた貫通孔１２４において、ボルト締めで軸組９７に固定されている。
【００６９】
上面板１１９、及び垂直板１１８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１１９、及び垂直板１１８が、隅木梁接続梁１１７の斜め上方から斜め下方へと伸びる隅木梁１１５と接触することを防止している。
【００７０】
隅木梁１１５と隅木梁接続梁１１７との接続部分において、増築部側に葺き下ろし梁１０２を設けて増築する必要がある場合、図３４に示すように、箱部１２１の増築部側側面に、葺き下ろし梁１０２の基部１０３を接合させ、箱部１２１の増築部側側面に設けた貫通孔１２５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１０２を接続しない場合には、箱部１２１の増築部側側面は平坦面である必要は無く、箱部１２１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。
【００７１】
また、図３２に示すように、軒先梁８４の一端部を登り梁１１６に接続する必要がある場合には、既存の登り梁接続金具１２６等を用いて接続すればよい。
【００７２】
第３に、図３６に示すように、既存住宅と増築部の境界部分において生じる谷部に沿って設置する新規谷木梁１２７の上端部を既存住宅の既存大棟１２８の端部に接続する。これは、図３８乃至図４０に示すように、既存大棟１２８の端部下の垂直部材である、既存寄棟束１２９の上端部１３０に設けられた母屋受け１３１に谷木梁接続金具１３２を用いて新規谷木梁１２７の上端部を接続することにより行う。以下、更に詳細に説明する。
【００７３】
新規谷木梁１２７は、図３９に示すように、２本のＣ型鋼１３３を、開口部が互いに外側を向くようにボルト締めで締結したものであり、２本のＣ型鋼１３３間には所望の間隔の隙間が確保されている。
【００７４】
既存寄棟束１２９は、新規谷木梁１２７と同様に、開口部が外側を向くように２本のＣ型鋼１３３をボルト締めで締結したものであって、図３８に示すように、上端部に母屋受け１３１、及び梁接続金具１３４が設けられている。
【００７５】
母屋受け１３１は、図４０に示すように、平部１３５の相向かい合う端縁のそれぞれに、断面略Ｌ字形の母屋受けの載置部１３６の端縁を固着することにより形成され、母屋を受ける受け部１３７には、母屋を母屋受け１３１に固定するための貫通孔１３８が穿設されている。また、図３８に示すように、三つ又形状の梁接続金具１３４には、既存隅木梁１３９の上端部が接続されている。
【００７６】
既存隅木梁１３９は、図３６に示すように、既存大棟１２８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ることにより定まる立上り角度θで、既存寄棟束１２９の上端部に設置された梁接続金具１３４に接続されている。
【００７７】
谷木梁接続金具１３２は、図３７に示すように、貫通孔１４０が穿設された基部１４１と、該基部１４１と略４５°の角度をなす谷木梁取付け部１４２とを具備している。谷木梁取付け部１４２は、略矩形の平板であり、その上隅角部が、既存隅木梁１３９の立ち上がり角θと略等しい角度で、切取り線１４３において切り落とされている。また、該谷木梁取付け部１４２は、新規谷木梁１２７の２本のＣ型鋼１３３の間に確保された隙間の間隔より若干薄く形成されている。更に、本実施形態の場合、谷木梁接続金具１３２は図３７に示すような三つ又形状であるが、谷木梁取付け部１４２以外の２つの梁取付け部１４４については特に使用していない。もちろん、谷木梁接続金具１３２は、谷木梁取付け部１４２のみを有する形態であっても構わない。
【００７８】
新規谷木梁１２７の既存大棟１２８端部への接続に際しては、まず、谷木梁接続金具１３２の基部１４１を母屋受け１３１の平部１３５上に、該基部１４１の左右両端縁と平部１３５の左右両端縁とが略合致するよう載置し、ボルト締めにより固定する。これにより、基部１４１と略４５°の角度をなす谷木梁取付け部１４２は、既存隅木梁１３９と略９０°の角度をなして設置される。また、このように、母屋受け１３１の平部１３５に設けられている貫通孔１４５を利用して新規谷木梁１２７の上端部を固定することで、他の場所に固定する場合に比べて、新たな貫通孔を設ける手間が削減できるという利点がある。
【００７９】
次に、谷木梁接続金具１３２の谷木梁取付け部１４２に、新規谷木梁１２７の２本のＣ型鋼１３３間の隙間をあてがい、新規谷木梁１２７を押し込むことで、谷木梁取付け部１４２を隙間に挿通させ、谷木梁取付け部１４２の上隅角の切取り線１４３と、新規谷木梁１２７の上面が略同一面となり、且つ新規谷木梁１２７の先端部の位置が、切取り線１４３の上端部の位置と略合致するよう、新規谷木梁１２７の姿勢を調整し、ボルト締めにより固定する。これにより、新規谷木梁１２７を、既存隅木梁１３９と略９０°の角度をなすと共に、既存隅木梁１３９の立ち上がり角と略等しい立ち上がり角度で、既存大棟１２８の端部に接続している。
【００８０】
【発明の効果】
以上説明したように、請求項１に記載の小屋組の増築施工法によれば、既存住宅の小屋組を全面的に解体することなく、既存住宅の既存母屋を全て撤去することなく、既存住宅の増築部側の母屋の設置方向を略９０°変更して増築部の新規母屋を既存住宅の既存母屋と略同一面に配置することができると共に、既存住宅と増築部の境界に生じる谷部に沿って設置する新規谷木梁の上端部を、既存大棟の端部に接続することができるという利点がある。
【００８１】
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。
【００８２】
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。
【００８３】
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。
【００８４】
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。
【００８５】
請求項２に記載の小屋組の増築施工法によれば、上述の効果に加えて、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、既存住宅の軒先に沿って軒先梁を新たに設置することができるという利点がある。
【００８６】
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。
【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】軒先母屋の実施形態を示す平面図である。
【図３】軒先母屋受け金具及び軒先母屋延長金具を示す斜視図である。
【図４】軒先母屋延長金具の軒先母屋受け金具への固定手順を示す説明図である。
【図５】新規軒先母屋の軒先母屋延長金具への接続手順を示す説明図である。
【図６】第１母屋の実施形態を示す平面図である。
【図７】第１母屋受け金具を示す平面図である。
【図８】第１母屋延長金具を示す斜視図である。
【図９】第１母屋延長金具の第１母屋受け金具への固定手順を示す説明図である。
【図１０】新規第１母屋の第１母屋延長金具への接続手順を示す説明図である。
【図１１】第２母屋の実施形態を示す平面図である。
【図１２】第２母屋受け金具を示す平面図である。
【図１３】第２母屋延長金具を示す斜視図である。
【図１４】第２母屋延長金具の第２母屋受け金具への固定手順を示す説明図である。
【図１５】新規第２母屋の第２母屋延長金具への接続手順を示す説明図である。
【図１６】一般母屋の実施形態を示す平面図である。
【図１７】一般母屋受け金具を示す平面図である。
【図１８】一般母屋延長金具を示す斜視図である。
【図１９】一般母屋延長金具の一般母屋受け金具への固定手順を示す説明図である。
【図２０】新規一般母屋の一般母屋延長金具への接続手順を示す説明図である。
【図２１】軒先梁の設置の実施形態に係る小屋組の屋根伏せを示す図である。
【図２２】軒先梁の設置の第１の実施形態に係る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２３】軒先梁の設置の第１の実施形態に係る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２４】軒先梁の設置の第１の実施形態に係る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２５】軒先梁の設置の第１の実施形態に係る軒先梁設置金具の概略斜視図である。
【図２６】軒先梁の設置の第１の実施形態に係る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２７】軒先梁の設置の第１の実施形態に係る軒先梁設置金具の設置状態を示す概略側面図である。
【図２８】軒先梁の設置の第１の実施形態に係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２９】軒先梁の設置の第１の実施形態に係る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３０】軒先梁の設置の第２の実施形態に係る軒先梁設置金具の概略斜視図である。
【図３１】軒先梁の設置の第２の実施形態に係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３２】軒先梁の設置の実施形態に係るトラス、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３３】隅木梁接続梁の概略斜視図である。
【図３４】本発明の実施形態に係る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３５】本発明の実施形態に係る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。
【図３６】新規谷木梁の既存大棟端部への接続の実施形態に係る小屋組の屋根伏せを示す図である。
【図３７】谷木梁接続金具の概略斜視図である。
【図３８】新規谷木梁と母屋受けの接続部分を示す概略平面図である。
【図３９】新規谷木梁と母屋受けの接続部分を示す、概略側面図である。
【図４０】新規谷木梁と母屋受けの接続部分を示す、概略正面図である。
【符号の説明】
１新規軒先母屋
２既存軒先母屋
３既存隅木梁
４既存軒先梁
２０新規第１母屋
２１既存第１母屋
４２新規第２母屋
４３既存第２母屋
６４新規一般母屋
６５既存一般母屋
８３トラス
８４軒先梁
１２７新規谷木梁
１２８既存大棟[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]
If a part of the girder face of a dormitory structure is expanded, the height of the ridge and the direction of the ridge will be higher after the expansion, and the entire structure of the hut will often change.
[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-described problems, and is intended to save labor, reduce costs, and reduce waste in an extension work when adding to a part of a girder face of a dormitory existing house. The purpose is to provide an extension construction method for huts.
[0009]
[Means for Solving the Problems]
Specific means for solving the technical problem is as follows. That is, according to the method for extending a hut assembly according to claim 1, a part of the existing hut assembly of the existing house and a part of the new hut assembly of the extension section are arranged on a part of the girder surface of the existing house of the dormitory structure. It is a method of extension of a hut assembly in the extension work when extending the extension building to the same height as the existing residence building on the same surface, existing corner trees located at the boundary between the existing house and the extension part Using a purlin extension fitting having a purlin receiving connection portion installed on a purlin receiving fitting installed on a beam and a purlin connecting portion forming approximately 90 ° with the purlin receiving connection portion, the purlin receiving connection portion on the purlin receiving bracket And the installation direction of the purlin on the extension part side of the existing house is changed by approximately 90 ° by installing the new purlin of the extension part on the extension of the existing purlin installed on the purlin bracket. The new purlin is located on the same plane as the existing purlin, The base of the valley beam connection fitting is fixed to the purlin receptacle installed near the top of the subordinate existing bunches, and the valley beam connection fitting protruding from the base at an angle of approximately 45 ° is provided. Tanigi beam mounting part In addition, the upper end of the new valley wooden beam is fixed to the end of the existing large building by fixing the upper end of the new valley wooden beam installed along the valley generated at the boundary between the existing house and the extension part. Yes.
[0010]
The extension construction method of the hut assembly according to claim 2 is the same as the extension construction method of the hut assembly according to claim 1, in which the truss eaves on the side of the girder side of the existing house is cut out and the eaves side of the adjacent truss At the end, there is a web straddling portion that straddles the web of the truss, and an eaves beam connecting portion that protrudes perpendicularly from the web straddling portion Eaves beam installation bracket The eaves beam connecting portions are arranged opposite to each other, and by connecting both ends of the eaves beam to the opposed eaves beam connecting portions, the eaves beam is formed along the eaves on the side surface of the existing house. It is characterized by adding new.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the roof building extension method according to the embodiment of the present invention is a case where the building is extended to a part of the girder surface of the existing house, and the extension part and a part of the building of the existing house are the same surface. And the height of the ridge of the extension is the same as the height of the ridge of the existing house. In this case, first, the extension of the main building on the side of the extension of the existing house The direction is changed by approximately 90 °, and the main building on the side of the extension is arranged on the same plane as the main buildings 2, 21, 43, and 65 of the existing housing that forms approximately 90 ° therewith and on the extension line thereof, Secondly, a new eaves beam 84 is added along the eaves on the side of the girder side of the existing house, and third, the upper end of the new trough beam 127 installed along the valley that occurs at the boundary between the existing house and the extension. To the end of the existing large building 128 of the existing house. Hereinafter, each will be described in more detail.
[0012]
1stly, as shown in FIG. 1, the installation direction of the main building by the side of the extension part of an existing house is changed about 90 degrees, and the new main part of an extension part is arrange | positioned in the substantially same surface as the existing main building of an existing house. First, the new eaves purlin 1 of the extension part is arranged on substantially the same plane as the existing eaves purlin 2 of the existing house. Specifically, as shown in FIG. 2, the eaves main building installed at the tip of the existing eaves beam 4 provided at the eaves part of the existing corner wooden beam 3 (not shown) located at the boundary between the existing house and the extension part. The eaves purlin extension metal fitting 6 is fixed to the receiving metal fitting 5, and the end 7 of the new eaves main house 1 is connected to the eaves main purlin extension metal 6, thereby installing the new eaves main house 1 on the extension of the existing eaves main house 2. The existing corner wooden beam 3 and the existing eaves beam 4 shown in each of the embodiments have the same configuration as that of the existing corner wooden beam 3 shown in FIG. 3, and are obtained by fastening two C-shaped steels with bolts. In addition, it is provided so as to be taken out in the direction of 45 ° from the end of the existing large building toward the corner of the eaves (see FIG. 1).
[0013]
As shown in FIG. 3, the existing eaves purlin 2 is a long timber with a tip formed in a predetermined shape, and the end is bolt nuts to the eaves purlin bracket 5 provided at the tip of the existing eaves beam 4. It is installed on the existing eaves beam 4 by being fastened and fixed with a fastener 8 composed of (see FIG. 1).
[0014]
As shown in FIG. 3, the eaves purlin bracket 5 is bent at an angle of about 90 ° at the center, and has a chevron plate 10 having through holes 9 at both ends, and a bend of the chevron plate 10. It has a substantially rectangular connecting plate 12 with one edge fixed to the corner of the portion 11. The eaves purlin bracket 5 is fixed to the existing eaves beam 4 by inserting the other end of the connection plate 12 from the tip of the existing eaves beam 4 between the two C-shaped steels of the existing eaves beam 4. Is fixed to the tip of the existing eaves beam 4 by bolting.
[0015]
As shown in FIG. 2, the existing eaves purlin 2 is fixed to the eaves purlin bracket 5 so that the front end of the existing eaves purlin 2 and the front end of the existing eaves purlin 13 on the extension side substantially coincide with each other. The end of the existing eaves purlin 2 and the end of the existing eaves purlin 13 on the extension part side are assigned to both outer side surfaces of the angle plate 10 of the metal fitting 5, and are fastened by fastening with the fasteners 8. As a result, the existing eaves purlin 2 and the existing eaves purlin 13 on the extension part side are arranged on the same surface and at the tip of the existing eaves beam 4 at an angle of approximately 90 °.
[0016]
As with the existing eaves purlin 2 shown in FIG. 3, the new eaves purlin 1 is a long wooden square member having a tip formed in a predetermined shape, and a through hole 14 is formed in the end 7 ( (See FIG. 5).
[0017]
As shown in FIG. 3, the eaves purlin extension metal fitting 6 is bent so that an angle of about 90 ° is formed by twisting one plate having through holes 15 and 16 at both ends at the center. One of them is an eaves purlin receiving connection part 17 and the other is an eaves purlin connection part 18.
[0018]
As shown in FIG. 4, the eaves purlin extension metal fitting 6 is fixed to the eaves purlin extension fitting 6 on the side surface of the eaves purlin extension metal plate 10 on the side of the extension portion 10. The side surface 17 is arranged so that the bent portion 11 of the eaves purlin bracket 5 and the bent portion 19 of the eaves purlin extension bracket 6 are substantially matched, and the through hole 9 of the angle plate 10 of the eaves purlin bracket 5 and the eaves purlin This is performed by fastening the through-hole 15 of the eaves purlin receiving connection portion 17 of the extension fitting 6 with the fastener 8. As a result, as shown in FIG. 4, the eaves purlin connecting portion 18 of the eaves purlin extension bracket 6 and the side surface of the eaves purlin support 5 on the side of the existing eaves purlin 2 of the mountain-shaped plate 10 are substantially flush with each other. Placed in.
[0019]
As shown in FIG. 5, the end 7 of the new eaves purlin 1 is connected to the eaves purlin extension bracket 6 after the eaves purlin extension bracket 6 is fixed to the eaves purlin support bracket 5. The end 7 of the new eaves purlin 1 is applied to the eaves purlin connecting portion 18 of the eaves purlin extension metal fitting 6 so that the front end of the eaves purlin 1 substantially coincides with the through hole 14 of the end 7 of the new eaves purlin 1 This is performed by fastening the through hole 16 of the eaves purlin connecting portion 18 of the eaves purlin extension metal fitting 6 with the fastener 8. Thereby, as shown in FIG. 2, the new eaves purlin 1 is installed on the extension of the existing eaves purlin 2.
[0020]
As described above, as shown in FIG. 1, the installation direction of the main building on the extension part side of the existing house is changed by approximately 90 °, and the new eaves main building 1 is arranged on the same plane as the existing eaves main building 2, that is, the existing eaves Purlin 2 will be extended to the extension.
[0021]
Next, as shown in FIG. 1, the new first purlin 20 of the extension part is arranged on the same plane as the existing first purlin 21 of the existing house. Specifically, as shown in FIG. 6, the first purlin extension bracket 23 is fixed to the first purlin support bracket 22 installed at the end of the existing corner beam 3 (not shown) of the existing eaves beam 4. Then, the new first purlin 20 is installed on the extension of the existing first purlin 21 by connecting the end 24 of the new first purlin 20 to the first purlin extension metal fitting 23. The new first purlin 20 is a long wooden timber, and a through hole 25 is formed in the end 24 (see FIG. 10).
[0022]
The existing first purlin 21 has the same configuration as that of the existing eaves purlin 2, and as shown in FIG. 6, the end 8 is fastened to the first purlin bracket 22 provided at a predetermined position of the existing eaves eaves beam 4. It is installed on the first level of the existing eaves purlin 2 by fastening and fixing at (see FIG. 1).
[0023]
As shown in FIG. 7, the first purlin bracket 22 has a substantially trapezoidal flat portion 26 whose oblique side forms an angle of approximately 45 ° with respect to the long side, and an angle of approximately 90 ° from the long side of the flat portion 26. And a first purlin receiving portion 28 having a through hole 27 formed at an end thereof. The first purlin support bracket 22 is fixed to the existing eaves beam 4 by welding, and each of the two first purlin support members 22 is arranged such that each first purlin support portion 28 is relative to the long axis L of the existing eaves beam 4. It is provided on both side surfaces of the existing eaves beam 4 so as to be symmetrical, that is, so that the first purlin receiving portions 28 form an angle of approximately 90 °.
[0024]
The fixing of the existing first purlin 21 to the first purlin bracket 22 is as shown in FIG.
The tip of the existing first purlin 21 is brought into contact with the side surface of the extension part of the existing eaves beam 4, the end of the existing first purlin 21 is placed on the flat part 26 of the first purlin bracket 22, and the first purlin bracket This is done by fastening the first purlin receiving portion 28 of 22 with the fastener 8. Thereby, the existing first purlin 21 and the existing first purlin 29 on the extension part side are arranged on the existing eaves beam 4 at an angle of about 90 ° on the same plane.
[0025]
As shown in FIG. 8, the first purlin extension metal 23 has a substantially trapezoidal lid portion 30 whose oblique side forms an angle of about 45 ° with respect to the long side, and an angle of about 90 ° from the short side of the lid portion 30. And a first purlin receiving connection member 33 having a first purlin receiving connection portion 32 having a through-hole 31 formed in the lower corner and a hypotenuse with an angle of approximately 45 ° with respect to the long side. And a first purlin connection portion 36 that rises upward at an angle of approximately 90 ° from the short side of the bottom portion 34 and has a through hole 35 formed in the upper corner portion. The first purlin connection member 37, the substantially rectangular attachment portion 38, the edge opposite to the oblique side of the lid portion 30, and the substantially rectangular reinforcing portion 39 fixed to the edge of the first purlin receiving connection portion 32. In addition, the oblique side of the bottom 34, the edge of the first purlin connection portion 36, and the oblique side of the lid portion 30 on the surface of the attachment portion 38. It is obtained by forming by sticking.
[0026]
As shown in FIG. 9, the first purlin extension fitting 23 is fixed to the first purlin support fitting 22 on the side of the extension, as shown in FIG. 9. The first purlin of the first purlin receiving connection member 33 of the first purlin extension fitting 23 is placed on the side surface of the flat portion 26 of the first purlin receiving portion 28 of the first purlin receiving bracket 22. Along with the receiving connection portion 32, the back surface of the appendage 38 of the first purlin extension bracket 23 is applied to the side of the extension portion of the existing eaves beam 4, and the first purlin extension is extended to the first purlin receiving portion 28 of the first purlin bracket 22. This is performed by fastening and fixing the first purlin receiving connection portion 32 of the metal fitting 23 with a fastener (not shown).
[0027]
At this time, if the length of the bent portion of the first purlin receiving connection member 33 of the first purlin extension fitting 23 is substantially equal to the upper edge of the first purlin receiving portion 28 of the first purlin receiving bracket 22, When the first purlin extension bracket 23 is fixed to the first purlin support bracket 22, the first purlin support connection member 33 of the first purlin extension bracket 23 is connected to the existing eaves beam 4 and the reinforcing portion 39 of the first purlin extension bracket 23. Therefore, the first purlin extension bracket 23 can be stably installed on the first purlin support bracket 22 (see FIG. 10).
[0028]
As a result, as shown in FIG. 10, the bent portion 40 of the first purlin connecting member 37 of the first purlin extension bracket 23 is connected to the bent portion 41 of the first purlin bracket 22 toward the existing first purlin 21. It arrange | positions on the substantially identical surface and its extension line.
[0029]
As shown in FIG. 10, the end 24 of the new first purlin 20 is connected to the first purlin extension bracket 23 after the first purlin extension bracket 23 is fixed to the first purlin support bracket 22, as shown in FIG. The end 24 of the new first purlin 20 is placed on the first purlin connection member 37 of the metal fitting 23, and the through hole 25 of the end 24 of the new first purlin 20 and the first purlin connection of the first purlin extension metal fitting 23 are connected. This is performed by fastening the through hole 35 of the portion 36 with the fastener 8. Thereby, as shown in FIG. 6, the new first purlin 20 is installed on the extension of the existing first purlin 21.
[0030]
As described above, as shown in FIG. 1, the installation direction of the main building on the extension part side of the existing house is changed by approximately 90 °, and the new first main building 20 is arranged on the same plane as the existing first main building 21. The existing first purlin 21 is extended to the extension part side.
[0031]
Next, as shown in FIG. 1, the new second purlin 42 of the extension part is arranged on the same plane as the existing second purlin 43 of the existing house. Specifically, as shown in FIG. 11, a second purlin extension bracket 45 is fixed to a second purlin support bracket 44 installed in the vicinity of the connecting portion between the existing corner beam 3 and the existing eaves beam 4, and the second The new second purlin 42 is installed on the extension of the existing second purlin 43 by connecting the end 46 of the new second purlin 42 to the main purlin extension metal 45. The new second purlin 42 is a long wooden timber, and a through hole 47 is formed in the end 46 (see FIG. 15).
[0032]
The existing second purlin 43 has the same configuration as that of the existing eaves purlin 2 and the existing first purlin 21, and its end is located near the connection portion of the existing corner wooden beam 3 with the existing eaves beam 4 as shown in FIG. 11. By being fastened and fixed to the provided second purlin bracket 44 by the fasteners 8, it is installed on the second level of the existing eaves purlin 2 (see FIG. 1).
[0033]
As shown in FIG. 12, the second purlin bracket 44 includes a substantially hexagonal flat portion 48 having two edges that form approximately 90 ° with each other, and approximately 90 ° from the edges of each flat portion 48. It has a second purlin receiving part 50 that rises upward and has a through hole 49 formed in the upper end part. The second purlin support bracket 44 is fixed to the existing corner wooden beam 3 by welding, and the two second purlin support portions 50 of the second purlin support bracket 44 are symmetrical with respect to the long axis L of the existing corner wooden beam 3. It is provided on the upper surface of the existing corner wooden beam 3 so as to become.
[0034]
As shown in FIG. 11, the fixing of the existing second purlin 43 to the second purlin bracket 44 is such that the tip of the existing second purlin 43 substantially matches the tip of the existing second purlin 51 on the extension part side. In addition, the end portion of the existing second purlin 43 and the end portion of the existing second purlin 51 on the extension portion side are respectively mounted on the flat portion 48 of the second purlin bracket 44 and fastened to each second purlin receiving portion 50. This is done by fastening and fixing with the tool 8. Thereby, the existing second purlin 43 and the existing second purlin 51 on the extension part side are arranged on the existing corner wooden beam 3 at an angle of about 90 ° on the same plane.
[0035]
As shown in FIG. 13, the second purlin extension fitting 45 has the same configuration as the first purlin extension fitting 23 of the second embodiment, and a second purlin support in which a lid 52 and a through hole 53 are formed. A second purlin connection member 59 having a second purlin receiving connection member 55 having a connection portion 54, a second purlin connection portion 58 having a bottom portion 56 and a through-hole 57, an attachment portion 60, and a reinforcement portion 61 is formed by fixing the oblique side of the bottom portion 56, the edge of the second purlin connection portion 58, and the oblique side of the lid portion 52 to the surface of the attachment portion 60.
[0036]
The fixing of the second purlin extension fitting 45 to the second purlin support fitting 44 is the same as in the second embodiment, as shown in FIG. 14, and the second purlin extension fitting 45 has a second purlin receiving connection member 55. Is attached to the second purlin receiving portion 50 of the second purlin receiving bracket 44 from above, and the second purlin receiving connection portion 54 of the second purlin extension fitting 45 is fastened to the second purlin receiving portion 50 of the second purlin receiving bracket 44. This is done by fastening and fixing with a tool (not shown).
[0037]
At this time, the length of the bent portion of the second purlin support connection member 55 of the second purlin extension fitting 45 is changed from the appendage 60 when the second purlin extension fitting 45 is fixed to the second purlin support fitting 44 to the second. When the second purlin extension bracket 45 is fixed to the second purlin support bracket 44 when the distance to the edge facing the existing corner wooden beam 3 of the purlin receiver 50 is substantially equal, Since the second purlin support connecting member 55 is sandwiched between the attachment portion 60 and the reinforcing portion 61 of the second purlin extension fitting 45, the second purlin extension fitting 45 is stably installed on the second purlin support fitting 44. (See FIG. 15).
[0038]
Accordingly, as shown in FIG. 15, the bent portion 62 of the second purlin connecting member 59 of the second purlin extension fitting 45 is substantially flush with the bent portion 63 of the existing second purlin 43, and It is arranged on the extension line.
[0039]
The connection of the end 46 of the new second purlin 42 to the second purlin extension bracket 45 is performed as shown in FIG. 15, after the second purlin extension bracket 45 is fixed to the second purlin support bracket 44, the second purlin extension The end 46 of the new second purlin 42 is placed on the second purlin connection member 59 of the metal fitting 45, and the through hole 47 of the end 46 of the new second purlin 42 and the second purlin connection of the second purlin extension metal fitting 45 are connected. This is performed by fastening the through hole 57 of the portion 58 with the fastener 8. Accordingly, as shown in FIG. 11, the new second purlin 42 is installed on the extension of the existing second purlin 43.
[0040]
As described above, as shown in FIG. 1, the installation direction of the main building on the extension part side of the existing house is changed by approximately 90 °, and the new second main building 42 is arranged on the same plane as the existing second main building 43, that is, The existing second purlin 43 is extended to the extension part side.
[0041]
Next, as shown in FIG. 1, the new general purlin 64 of the extension part is arranged on the same plane as the existing general purlin 65 of the existing house. Specifically, as shown in FIG. 16, a general purlin extension metal fitting 67 is fixed to a general purlin bracket 66 installed on the existing corner wooden beam 3, and an end 68 of the new general purlin 64 is attached to the general purlin extension metal 67. To connect the new general purlin 64 on the extension of the existing general purlin 65. The new general purlin 64 is a long timber material, and a through hole 69 is formed in the end 68 (see FIG. 20).
[0042]
The existing general purlin 65 has the same configuration as the existing eaves purlin 2, the existing first purlin 21 and the existing second purlin 43, and as shown in FIG. By fastening and fixing to the metal fitting 66 with the fastener 8, it is installed in three or more steps of the existing eaves purlin 2 (see FIG. 1).
[0043]
As shown in FIG. 17, the general purlin bracket 66 has the same configuration as the second purlin bracket 44 of the third embodiment, and is a substantially hexagonal flat portion having two edges that form approximately 90 ° with each other. 70 and a general purlin receiving portion 72 that rises upward from the edge of each flat portion 70 at an angle of approximately 90 ° and has a through hole 71 formed at the upper end. The general purlin bracket 66 is fixed to the existing corner wooden beam 3 by welding so that the two general purlin receiving portions 72 of the general purlin bracket 66 are symmetrical with respect to the major axis L of the existing corner wooden beam 3. Are provided on the upper surface of the existing corner wooden beam 3.
[0044]
As shown in FIG. 16, the fixing of the existing general purlin 65 to the general purlin bracket 66 is similar to the third embodiment, and the end of the existing general purlin 65 and the end of the existing general purlin 73 on the extension portion side. Are placed on the flat part 70 of the general purlin bracket 66 and fastened to each general purlin receiver 72 with the fasteners 8 and fixed. Thereby, the existing general purlin 65 and the existing general purlin 73 on the extension part side are arranged on the existing corner wooden beam 3 at an angle of about 90 ° on the same plane.
[0045]
As shown in FIG. 18, the general purlin extension metal fitting 67 has a substantially trapezoidal general purlin receiving connection portion in which the oblique side forms an angle of about 45 ° with respect to the long side and the upper corner portion has a through hole 74 formed therein. 75, a substantially rectangular bottom 76, and an oblique side having a through-hole 77 formed in the upper corner of the long side with respect to the long side. A general purlin connection member 79 having a general trapezoidal general purlin connection portion 78 having an angle of approximately 45 °; and a reinforcing portion 80 fixed to an edge opposite to the oblique side of the general purlin receiving connection portion 75. The slant side of the general purlin receiving connection part 75 and the slant side of the general purlin connection part 78 are substantially matched and fixed.
[0046]
As shown in FIG. 19, the general purlin extension bracket 67 is fixed to the side surface of the flat portion 70 of the general purlin support portion 72 on the extension portion side of the general purlin bracket 66, as shown in FIG. 19. The general purlin receiving connection portion 75 is applied, and the general purlin receiving connection portion 75 of the general purlin extension metal fitting 67 is fastened and fixed to the general purlin receiving portion 72 of the general purlin receiving bracket 66 with a fastener (not shown). .
[0047]
At this time, when the length of the upper edge of the general purlin receiving connection portion 75 of the general purlin extension fitting 67 is fixed to the general purlin receiving fitting 67 to the general purlin receiving fitting 66, the hypotenuse of the general purlin receiving connection portion 75 is already present. If the length is in contact with the tip of the general purlin 65, the edge facing the existing corner wooden beam 3 of the general purlin receiving portion 72 of the general purlin receiving bracket 66 will be in contact with the reinforcing portion 80 of the general purlin extension metal fitting 67. Since the general purlin receiving connection portion 75 of the general purlin extension metal fitting 67 is sandwiched between the existing general purlin 65 and the reinforcing portion 80 of the general purlin extension metal fitting 67, the general purlin extension fitting 67 is replaced with the general purlin support fitting 66. It can be installed stably (see FIG. 20).
[0048]
Accordingly, as shown in FIG. 20, the bent portion 81 of the general purlin connecting member 79 of the general purlin extension fitting 67 is substantially flush with the bent portion 82 of the general purlin bracket 66 toward the existing general purlin 65. And it arrange | positions on the extension line.
[0049]
As shown in FIG. 20, the end 68 of the new general purlin 64 is connected to the general purlin extension bracket 67 after the general purlin extension bracket 67 is fixed to the general purlin support bracket 66 and then the general purlin of the general purlin extension bracket 67 is fixed. The end portion 68 of the new general purlin 64 is placed on the connection member 79, and the through hole 69 of the end portion 68 of the new general purlin 64 and the through hole 77 of the general purlin connection portion 78 of the general purlin extension metal fitting 67 are fastened. This is done by fastening at 8. Thereby, as shown in FIG. 16, the new general purlin 64 is installed on the extension of the existing general purlin 65.
[0050]
As described above, as shown in FIG. 1, the installation direction of the main building on the extension part side of the existing house is changed by approximately 90 °, and the new general main building 64 is arranged on the same plane as the existing general main building 65. The main building 65 is extended to the extension part side.
[0051]
Second, a new eaves beam will be added along the eaves on the side of the girder of the existing house. As shown in FIG. 21, in the first embodiment of the eaves-end beam, eaves-end beams 84 are installed on both sides of the existing truss 83 along the eaves of the side of the existing house. 25, it is necessary to install the orthogonal beam 85 in a direction substantially orthogonal to the eaves beam 84. In the procedure shown in FIG. 22, the truss eaves part 86 is pretreated and the web as shown in FIG. The eaves beam connection part 88 is positioned relative to the eaves side end of the adjacent truss 83 with the eaves beam connection part 88, the cross beam part 88, the orthogonal beam connection part 89, and the bottom part 90. This is performed by connecting both end portions of the eaves beam 84 to the eaves beam connection portions 88 that are arranged to face each other and face each other. This will be described in more detail below.
[0052]
When installing the eaves beam mounting bracket 91 at the end of the truss 83 on the eaves side, the truss eaves part 86 and the plate 92 provided at the end of the eaves side of the truss 83 are obstructive, so they are removed. A pretreatment step is required. FIG. 22 shows the procedure of this pretreatment process, and FIGS. 23 and 24 show the state after the work for each procedure.
[0053]
In the procedure 1, the truss eaves part 86 is excised. This is for facilitating the subsequent work by shortening the truss eaves portion 86 appropriately. Here, FIG. 23A shows a state before this procedure, and FIG. 23B shows a state after the procedure. 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.
[0054]
In step 2, in order to remove the plate 92 having a substantially inverted L-shaped cross section provided at the end of the truss 83 on the eaves side, facing the eaves end, the plate 92 and the truss 83 are aligned along the joint surface. In addition, the truss eaves portion 86 is cut in the vertical direction. At this time, it is easy to cut by avoiding the welded portion between the plate 92 and the truss 83 and cutting slightly inside the joint surface between the plate 92 and the truss 83. Here, FIG.23 (c) represents the state after the operation | work of this procedure.
[0055]
In procedure 3, the truss eave portion 86 is cut until the web 94 of the truss 83 is reached slightly on the eave end side from the tip of the C-shaped channel 93 of the truss 83. This is in order to remove a portion that hinders the installation of the eaves-end beam mounting bracket 91. Here, FIG. 23D shows a state after the operation of this procedure.
[0056]
In step 4, the plate 92 is separated from the truss 83 by cutting the lower portion of the plate 92 from the eaves side in the horizontal direction. Here, FIG. 24A shows a state after the operation of this procedure.
[0057]
In the procedure 5, for example, by polishing with a tool such as a sander (not shown), the remaining pieces of the plate 92 remaining in the lower portion of the truss 83 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 91 becomes good. Here, FIG. 24B shows a state after the operation of this procedure.
[0058]
In step 6, along the inclination of the web 94 of the truss 83 from the eaves side to the position cut in step 3, the joining surface of the truss 83 and the truss eaves part 86 is cut, and the eaves side part of the truss eaves part 86 is It has been removed. Here, FIG. 24C shows a state after the operation of this procedure.
[0059]
A pair of left and right web straddling portions 87 that rise in the vertical direction from the bottom portion 90 of the eaves beam installation metal fitting 91 shown in FIG. 25 are arranged substantially in parallel with an interval slightly wider than the thickness of the web 94 of the truss 83. . When installing the eaves beam installation fitting 91, as shown in FIGS. 26 and 27, the web straddling portion 87 straddles the end portion of the web 94 of the truss 83 subjected to the pretreatment as described above. The eaves beam installation metal fitting 91 is applied, and the eaves beam installation metal fitting 91 is pushed in until the end of the web 94 of the truss 83 on the eave edge side reaches the orthogonal beam connection part 89, and the through hole 95 provided in the web straddling part 87, and the bottom part A through hole 96 provided in 90 is fixed to the truss 83 and the shaft set 97 by bolting.
[0060]
The eaves beam connecting portions 88 projecting on both sides of the eaves beam installation metal fitting 91 form an angle of approximately 90 ° with both the web straddling portion 87 and the bottom portion 90. As shown in FIG. A web 98 of an eaves beam 84, which is an H-shaped steel, is brought into contact with the beam connection part 88, and is fixed by bolting in a through hole 99 provided in the eaves beam connection part 88. It is installed.
[0061]
The orthogonal beam connecting portion 89 is provided at an angle of approximately 90 ° with both the web straddling portion 87 and the bottom portion 90, and the eaves side surface is formed as a flat surface. Thereby, when the eaves end beam installation metal fitting 91 is installed, the flat surface of the orthogonal beam connecting portion 89 faces the eave end, and as shown in FIGS. 27 and 28, this flat surface is orthogonal to the H-shaped steel. The orthogonal beam 85 can be easily installed by joining one end portion of the beam 85 via the bonding plate 100 and fixing the beam 85 with a bolt in the through hole 101 provided in the orthogonal beam connection portion 89.
[0062]
In addition, when the extension beam 102 is extended on the eaves side, it is necessary to newly install the eaves beam 84 along the eaves on the side face of the existing house. In this case, the pre-processing of the truss eave portion 86, the arrangement of the eaves beam installation metal fitting 91, and the installation of the eaves beam 84 are performed in the same procedure as in the case of the installation of the orthogonal beam 85, and as shown in FIG. The base 103 of the lowered beam 102 may be joined to the beam connecting portion 89 and fixed by bolting.
[0063]
Next, as shown in FIG. 21, the second embodiment of the installation of the eaves-beams is to install an eaves-beam 84 on one side of the existing truss 83 along the eaves of the side of the existing house. FIG. 30 shows a case where the orthogonal beam 85 needs to be installed in a direction orthogonal to the eaves beam 84 on the extension part side, and the truss eaves part 86 is pre-processed in the same procedure as in the first embodiment. As shown in FIG. 30 (b), as shown in FIG. 30 (b), the web straddling portion 104, the eaves end beam connecting portion 105, the orthogonal beam connecting portion 106, and the eaves end beam installation metal fitting 108 having the bottom 107. An eaves beam connection fitting 105 having an eaves beam connecting portion 113, an eaves beam connection portion 110, an orthogonal beam connection portion 111, and a bottom portion 112 is connected to an eaves end beam connection portion 105 at an end portion on the eaves side of the adjacent truss 83. Alternatively, 110 are arranged opposite to each other, and opposite each other The eaves beam connecting portion 105 or 110 that is to perform by connecting the two ends of the eaves beam 84. This will be described in more detail below.
[0064]
The web straddling portion 104 and the web straddling portion 109 have the same shape as the web straddling portion 87 of the eaves end beam installation fitting 91 of the first embodiment, and the method of installing the truss 83 at the end portion on the eaves end side. Is the same as in the first embodiment.
[0065]
The eaves beam connecting portion 105 provided on the right side of the eaves beam installation metal fitting 108 forms an angle of approximately 90 ° with both the web straddle portion 104 and the bottom portion 107. As shown in FIG. A web 98 of an eaves beam 84 made of H-shaped steel is brought into contact with the connection part 105, and is fixed by bolting in a through hole 114 provided in the eaves beam connection part 105, thereby installing the eaves beam 84 along the eaves. is doing. Moreover, the eaves beam installation metal fitting 113 has the eaves beam connection part 110 in the left side part, The structure of the other than that and the connection method of the eaves beam installation metal 84 are the same as that of the eaves beam installation metal fitting 108. The two eaves beam installation metal fittings 108 and the eaves beam installation metal fittings 113 are preferably used in accordance with the positional relationship between the truss 83 and the newly added eaves beam installation metal 84.
[0066]
The orthogonal beam connection part 106 and the orthogonal beam connection part 111 have the same shape as the orthogonal beam connection part 89 of the eaves beam installation metal fitting 91 of the first embodiment, and by the same procedure as the first embodiment, The orthogonal beam 85 or the hanging beam 102 can be installed on the extension part side.
[0067]
In either case of the two embodiments described above, when the eaves beam 84 is installed, as shown in FIG. 32, between the truss 83 and the truss 83, between the truss 83 and the corner wooden beam 115, and between the truss 83 and the climbing beam 116, It is necessary to appropriately change the longitudinal dimension of the eaves beam 84 and the shape of the end depending on whether it is installed between the climbing beam 116 and the corner wooden beam 115. In particular, when there is an existing corner wood beam 115 on one end side of the eaves beam 84, the eaves beam 84 becomes the corner wood beam 115 by providing a corner wood beam connection beam 117 at the end of the eaves beam 84 on the corner wood beam 115 side. Preventing contact.
[0068]
As shown in FIG. 33, the corner beam connecting beam 117 is fixed to the vertical plate 118, the upper edge of the vertical plate 118, the upper surface plate 119 orthogonal to the vertical plate 118, and the lower edge of the vertical plate 118. A bottom plate 120 orthogonal to the vertical plate 118, a box part 121 having a substantially rectangular parallelepiped shape fixed on the bottom plate 120 and having a hollow inside, and a reinforcing plate 122 provided inside the box part 121. 35, end portions of the top plate 119, the bottom plate 120, and the vertical plate 118 are fixed to the eaves beam 84 through the joining plate 123, and provided on the bottom surface of the box 121. The through-hole 124 is fixed to the shaft set 97 with bolts.
[0069]
The upper surface plate 119 and the vertical plate 118 have a shape in which a part of a substantially rectangular flat plate is cut off obliquely. Thereby, the upper surface plate 119 and the vertical plate 118 are prevented from coming into contact with the corner wooden beam 115 extending from the diagonally upper side to the diagonally lower side of the corner wooden beam connecting beam 117.
[0070]
In the connecting portion between the corner wooden beam 115 and the corner wooden beam connecting beam 117, when it is necessary to extend and install the lowering beam 102 on the extension portion side, as shown in FIG. 34, on the side of the extension portion side of the box portion 121, What is necessary is just to join the base part 103 of the rolling-down beam 102, and fix by bolting in the through-hole 125 provided in the extension part side side surface of the box part 121. FIG. Further, when the hanging beam 102 is not connected, the side surface of the extension portion side of the box portion 121 does not need to be a flat surface, and the shape of the box portion 121 is not limited to a hollow, substantially rectangular parallelepiped, and other shapes. It doesn't matter.
[0071]
In addition, as shown in FIG. 32, when one end of the eaves beam 84 needs to be connected to the climbing beam 116, the existing climbing beam fitting 126 may be used for connection.
[0072]
Third, as shown in FIG. 36, the upper end of the new valley tree beam 127 installed along the valley generated at the boundary between the existing house and the extension part is connected to the end of the existing large building 128 of the existing house. As shown in FIGS. 38 to 40, this is a vertical member below the end portion of the existing large building 128, and the main building support 131 provided at the upper end portion 130 of the existing building bundle 129 is used by using the valley beam connecting bracket 132. This is done by connecting the upper end of the new valley beam 127. This will be described in more detail below.
[0073]
As shown in FIG. 39, the new valley beam 127 is formed by fastening two C-shaped steels 133 by bolting so that the openings face each other, and a desired gap is provided between the two C-shaped steels 133. The gap is secured.
[0074]
As with the new valley beam 127, the existing bunker bundle 129 is obtained by fastening two C-shaped steels 133 with bolts so that the opening faces outward, and as shown in FIG. A receiver 131 and a beam connecting metal 134 are provided.
[0075]
As shown in FIG. 40, the purlin receiver 131 is formed by adhering the end edges of the mounting portion 136 of the main wall receiver having a substantially L-shaped cross section to the opposing edges of the flat portion 135, and receives the purlin. The receiving portion 137 has a through hole 138 for fixing the purlin to the purlin receiver 131. As shown in FIG. 38, the upper end portion of the existing corner wooden beam 139 is connected to the three-pronged beam connecting bracket 134.
[0076]
As shown in FIG. 36, the existing corner wooden beam 139 is provided at a rising angle θ determined by being taken out from the end of the existing large building 128 toward the exit corner of the existing eaves in a direction of 45 °. It is connected to a beam connecting fitting 134 installed at the upper end of the bundle 129.
[0077]
As shown in FIG. 37, the valley beam connecting metal fitting 132 includes a base portion 141 in which a through hole 140 is formed, and a valley beam support portion 142 that forms an angle of approximately 45 ° with the base portion 141. The trough beam mounting portion 142 is a substantially rectangular flat plate, and an upper corner portion thereof is cut off at a cut line 143 at an angle substantially equal to the rising angle θ of the existing corner wood beam 139. Further, the valley beam mounting portion 142 is formed to be slightly thinner than the gap between the two C-shaped steels 133 of the new valley beam 127. Further, in the present embodiment, the trough beam connecting bracket 132 has a three-pronged shape as shown in FIG. 37, but the two beam mounting portions 144 other than the trough beam mounting portion 142 are not particularly used. Of course, the trough beam connecting fitting 132 may have a form having only the trough beam mounting portion 142.
[0078]
When connecting the new trough beam 127 to the end of the existing main building 128, first, the base portion 141 of the trough beam connecting bracket 132 is placed on the flat portion 135 of the main building receiver 131, and the left and right edges of the base portion 141 and the left and right ends of the flat portion 135 Place it so that it is almost aligned with the edge, and fix it by bolting. As a result, the valley beam mounting portion 142 that forms an angle of approximately 45 ° with the base portion 141 is installed at an angle of approximately 90 ° with the existing corner beam 139. In addition, in this way, by fixing the upper end portion of the new valley beam 127 using the through hole 145 provided in the flat portion 135 of the purlin receiver 131, it is new compared to the case where it is fixed at another place. There is an advantage that the trouble of providing the through hole can be reduced.
[0079]
Next, a gap between the two C-shaped steels 133 of the new valley beam 127 is inserted into the valley beam attachment portion 142 of the valley beam connection fitting 132, and the valley beam attachment portion 142 is inserted into the gap by pushing the new valley beam 127, and the valley beam attachment The cutting line 143 at the upper corner of the part 142 and the top surface of the new valley tree beam 127 are substantially flush with each other, and the position of the tip of the new valley tree beam 127 is substantially coincident with the position of the upper end part of the cutting line 143. The posture of 127 is adjusted and fixed by bolting. Thus, the new valley wooden beam 127 is connected to the end of the existing large building 128 at an angle of about 90 ° with the existing corner wooden beam 139 and at a rising angle substantially equal to the rising angle of the existing corner wooden beam 139.
[0080]
【The invention's effect】
As described above, according to the method for extending a roof set according to claim 1, the existing house is not dismantled without completely dismantling the existing house and the existing main house is not removed. The direction of installation of the main building on the side of the extension can be changed by approximately 90 °, and the new main building of the extension can be placed on the same plane as the existing main building of the existing house. There is an advantage that the upper end part of the new valley beam installed along can be connected to the end part of the existing large building.
[0081]
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.
[0082]
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.
[0083]
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. .
[0084]
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.
[0085]
According to the extension construction method of a roof set according to claim 2, in addition to the above-mentioned effect, the eaves beam along the eaves of the existing house without completely dismantling the roof set, the back of the eaves, etc. of the existing house There is an advantage that can be newly installed.
[0086]
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.
[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 plan view showing an embodiment of an eaves purlin.
FIG. 3 is a perspective view showing an eaves purlin bracket and an eaves purlin extension bracket.
FIG. 4 is an explanatory view showing a procedure for fixing an eaves purlin extension bracket to an eaves purlin bracket.
FIG. 5 is an explanatory diagram showing a procedure for connecting a new eaves purlin to an eaves purlin extension fitting.
FIG. 6 is a plan view showing an embodiment of a first purlin.
FIG. 7 is a plan view showing a first purlin bracket.
FIG. 8 is a perspective view showing a first purlin extension fitting.
FIG. 9 is an explanatory view showing a procedure for fixing the first purlin extension bracket to the first purlin bracket.
FIG. 10 is an explanatory view showing a procedure for connecting the new first purlin to the first purlin extension fitting.
FIG. 11 is a plan view showing an embodiment of a second purlin.
FIG. 12 is a plan view showing a second purlin bracket.
FIG. 13 is a perspective view showing a second purlin extension fitting.
FIG. 14 is an explanatory view showing a procedure for fixing the second purlin extension bracket to the second purlin support bracket;
FIG. 15 is an explanatory diagram showing a procedure for connecting the new second purlin to the second purlin extension fitting.
FIG. 16 is a plan view showing an embodiment of a general purlin.
FIG. 17 is a plan view showing a general purlin bracket.
FIG. 18 is a perspective view showing a general purlin extension fitting.
FIG. 19 is an explanatory diagram showing a procedure for fixing the general purlin extension bracket to the general purlin bracket.
FIG. 20 is an explanatory diagram showing a procedure for connecting a new general purlin to a general purlin extension fitting.
FIG. 21 is a diagram showing roof covering of a roof set according to an embodiment of installation of eaves-end beams.
FIG. 22 is an explanatory diagram for explaining a flow of pre-processing for the truss eaves part according to the first embodiment of eaves eaves beam installation;
FIG. 23 is an explanatory diagram for explaining pre-processing for the truss eaves part according to the first embodiment of eaves eaves beam installation for each procedure;
FIG. 24 is an explanatory diagram for explaining pre-processing for the truss eaves part according to the first embodiment of eaves eaves beam installation for each procedure;
FIG. 25 is a schematic perspective view of the eaves beam installation metal fitting according to the first embodiment of eaves beam installation.
FIG. 26 is a schematic perspective view for explaining an installation method of the eaves beam installation metal fitting according to the first embodiment of installation of the eaves beam.
FIG. 27 is a schematic side view showing an installation state of the eaves beam installation metal fitting according to the first embodiment of installation of the eaves beam.
FIG. 28 is a schematic plan view showing a connecting portion between the eaves beam installation fitting and the eaves beam according to the first embodiment of the installation of the eaves beam.
FIG. 29 is a schematic side view showing a connecting portion between an eaves-end beam installation bracket and a hanging beam according to the first embodiment of eaves-end beam installation.
FIG. 30 is a schematic perspective view of an eaves beam installation fitting according to a second embodiment of eaves beam installation.
FIG. 31 is a schematic plan view showing a connecting portion between an eaves beam installation fitting and an eaves beam according to a second embodiment of installation of the eaves beam.
FIG. 32 is a schematic plan view for explaining a connection portion between the truss, the corner beam, the climbing beam, and the eaves beam according to the embodiment of the eaves beam installation.
FIG. 33 is a schematic perspective view of a corner wooden beam connecting beam.
FIG. 34 is a schematic plan view showing a joint portion between a corner-timber beam joint beam and a hanging beam according to an embodiment of the present invention.
FIG. 35 is a schematic perspective view showing a joint portion between a corner wooden beam and a corner wooden beam according to the embodiment of the present invention.
FIG. 36 is a diagram showing roof covering of a roof set according to an embodiment of connection of new valley beams to the end of an existing large building.
FIG. 37 is a schematic perspective view of a valley beam connecting metal fitting.
FIG. 38 is a schematic plan view showing a connection portion between a new valley beam and a purlin receptacle.
FIG. 39 is a schematic side view showing a connection portion between a new valley beam and a purlin receiver.
FIG. 40 is a schematic front view showing a connection portion between a new valley beam and a purlin receiver.
[Explanation of symbols]
1 New eaves purlin
2 Existing eaves purlin
3 Existing corner wooden beams
4 Existing eaves beams
20 New 1st Purlin
21 Existing 1st Purlin
42 New second purlin
43 Existing second purlin
64 New general purlin
65 Existing general purlin
83 truss
84 eaves
127 New Valley Tree Beam
128 Existing building

Claims

A part of the girder face of the existing house in the dormitory structure, a part of the existing hut assembly of the existing house and a part of the new hut assembly of the extension part are substantially the same surface, and the extension part ridge is the ridge of the existing house It is an extension construction method of the hut assembly in the extension work when extending to the same height as
A purlin extension fitting having a purlin receiving connection portion installed on a purlin receiving bracket installed on an existing corner wooden beam located at the boundary between the existing house and the extension portion, and a purlin connecting portion forming approximately 90 ° with the purlin receiving connection portion. Use, fixing the purlin support connection to the purlin bracket, and installing the new purlin of the extension on the extension of the existing purlin installed on the purlin bracket, The installation direction is changed by approximately 90 °, and the new purlin of the extension part is arranged on substantially the same plane as the existing purlin,
The above-mentioned valley-timber beam connection projecting in a direction that makes an angle of about 45 ° with the base, fixing the base of the valley-beam connection bracket to the purlin receptacle installed near the top of the existing bunches under the end of the existing large building the Tanikihari mounting portion of the bracket, connecting by fixing the upper end portion of the new valley wood beams to be installed along the valley occurring at the boundary of the build-section and existing houses, the upper end portion of the new valley wood beam on the end of the existing large building An extension construction method for huts, characterized by

Cut off the truss eaves on the side of the spar of the existing house, at the eaves side end of the adjacent truss, the web straddling part straddling the web of the truss, and the eaves projecting perpendicularly from the web striding part The eaves beam installation brackets having the beam connection parts are respectively arranged with the eaves beam connection parts facing each other, and the opposite ends of the eaves beam are connected to these opposite eaves beam connection parts, thereby The extension construction method for a cabin set according to claim 1, wherein a new eaves beam is added along the eaves on the side surface of the girder.