JP3861159B2

JP3861159B2 - Joint structure of outer wall

Info

Publication number: JP3861159B2
Application number: JP22268097A
Authority: JP
Inventors: 三朗泉; 博規中庄谷; 秀介町田; 秀夫上小澤
Original assignee: Misawa Homes Co Ltd
Current assignee: Misawa Homes Co Ltd
Priority date: 1997-08-19
Filing date: 1997-08-19
Publication date: 2006-12-20
Anticipated expiration: 2017-08-19
Also published as: JPH1162032A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の外壁材を上下左右に並設した外壁の目地構造に関する。
【０００２】
【背景技術】
住宅等の建物の外壁は、一般に、サイディング材等の外壁材を、鉄骨や木材を組んだ骨組みに並べて取り付けて形成している。
また、複数の建物ユニットを予め工場で製造し、これらを建設現場で組み合わせて建物を構築するユニット工法においては、工場で建物ユニットを製造する際に、ＡＬＣやＰＡＬＣ等の軽量気泡コンクリートからなる外壁材を、柱および梁を組んだ箱状の骨組みに組み付けるようにしている。この外壁材を取り付けた建物ユニットを建設現場で積層配列することにより、外壁材が並設され、建物の外壁が形成される。
【０００３】
このように、サイディング材や軽量気泡コンクリート等の外壁材を上下左右に並設した外壁では、隣接する外壁材の間に目地部が形成されるので、この目地部に防水処理を施す必要が生じる。
目地部の防水処理として、本出願人は、上下に隣接した外壁材の間に形成される横目地部に樋状部を備えた横目地部材を設けるとともに、左右に隣接した外壁材の間に形成される縦目地部に排水路を設け、雨水を横目地部材の樋状部に沿って流して、縦目地部の排水路を通じて下方に流し落とす方法を提案した（特願平９−８２７０９号）。この構造では、横目地部および縦目地部の交差部分で横目地部材が途切れるので、この交差部分の横目地部材よりも屋内側に、バックアップ材である角柱状の防水ブロックを配置して、その屋外側の面で止水するようにしている。
【０００４】
【発明が解決しようとする課題】
しかしながら、目地部において、防水ブロックを厳密に水平に設置するのは極めて困難であり、防水ブロックの設置状態（傾き方）によっては、その屋外側の面に屋内側に向かう下り傾斜が形成されることがあり、この屋外側の面を伝って雨水が屋内側に流れて、防水性が低下するおそれがある。
また、防水ブロックの設置時には、このような傾きが生じないように防水ブロックの傾きを厳密に管理しなければならないため、設置に手間がかかるという問題がある。
【０００５】
本発明の目的は、充分な防水性を確保できかつバックアップ材を容易に設置できる外壁の目地構造を提供することにある。
【０００６】
【課題を解決するための手段】
本発明は、図面を参照して説明すると、複数の外壁材６，７を上下左右に並設した外壁の目地構造であって、上下に隣接した外壁材の間に形成される横目地部８には、当該横目地部８に沿って水を流すための樋状部２１，８１を備えた横目地部材２０，８０が設けられ、左右に隣接した外壁材の間に形成される縦目地部９には、樋状部からの水を下方に落とすための排水路４０が設けられ、横目地部および縦目地部の交差部分には、横目地部材よりも屋内側にブロック状のバックアップ材６０が配置され、このバックアップ材の屋外側の面には、屋外側に向かう下り傾斜が付けられ、前記バックアップ材は、左右に隣接した前記外壁材のそれぞれの上端面部と、これらの外壁材が互いに対向する対向面部とがそれぞれ形成する各角部にそれぞれ取り付けられた一対の互いに対称な略Ｌ字状の止水ブロックからなり、これらの止水ブロックは、相互に密着して配置されることにより、前記縦目地部を横断して前記横目地部に配置されかつ上下に配置された前記外壁材にそれぞれ密着する横止水部と、この横止水部から前記縦目地部に沿って下方に延びる縦止水部とを有して略Ｔ状に配置されていることを特徴とする。
【０００７】
本発明では、バックアップ材の屋外側の面には、屋外側に向かう下り傾斜が付けられているため、横目地部および縦目地部の交差部分でバックアップ材により止水された雨水は、その屋外側の面の下り傾斜に沿って、屋外側に向かって流れ落ちるから、優れた防水性を確保できる。
また、バックアップ材には、予め屋内側に向かう下り傾斜が付けられているので、バックアップ材を通常の作業で設置した場合に、設置時の傾きによって屋外側の面に屋内側に向かう下り傾斜が形成されるのを確実に防止できる。従って、従来の角柱状のバックアップ材のように、設置時の傾きを厳密に管理しなくてもよくなるから、バックアップ材を簡単に設置できる。
さらに、バックアップ材を略Ｔ字状に配置することで、横目地部材の途切れた部分を屋内側から確実に覆うことができるから、優れた防水効果が得られる。
そのうえ、バックアップ材が一対の止水ブロックにより構成されていることで、止水ブロックを予め各外壁材に取り付けておくことができるから、外壁材を並設するだけで横目地部および縦目地部の交差部分にバックアップ材を簡単に設置できる。
また、一対の止水ブロックは互いに密着しているため、これらのブロック間からの雨水の浸入を確実に防止できる。
【０００８】
また、縦目地部に、排水路を構成する縦目地部材４１が屋外側から圧入される場合、この縦目地部材に、バックアップ材の屋外側の面の傾斜方向下端部が当接されていることが望ましい。
【０００９】
バックアップ材の傾斜方向下端部を縦目地部材に当接させると、雨水は、バックアップ材の屋外側の面に沿って下方に流されてから、縦目地部材を伝わって下方に流れ落ちるようになる。従って、バックアップ材により止水された水が、当該バックアップ材よりも下方で屋内側へ浸入するのを防止できる。
【００１２】
以上において、バックアップ材の屋内側の面は、外壁材の屋内側の面と平行にされていることが望ましい。
このようにすれば、バックアップ材を外壁材の屋内側の面と平行になるように配置するだけで、外壁材に対して簡単に位置決めできるから、バックアップ材の設置を一層容易化できる。
【００１３】
また、バックアップ材は、発泡体からなることが好ましく、これによると、バックアップ材に柔軟性を確保できるため、目地部の形状、大きさに拘わらず、バックアップ材が弾性変形して外壁材に追従するようになるから、バックアップ材および外壁材の間に優れた水密性を確保できる。
【００１４】
【発明の実施の形態】
以下、本発明の実施の一形態を図面に基づいて説明する。
図１には、二階建てのユニット式建物１が示されている。このユニット式建物１は、基礎２上に箱形の建物ユニット３を複数積層配列し、それらの建物ユニット３の上に屋根（図示省略）を設けて構築されている。
建物ユニット３は、図２に示すように、四本の柱１１、これらの四本の柱１１の上端間を連結する上梁１２および四本の柱１１の下端間を連結する下梁１３を含む直方体形状の骨組み４と、上梁１２間に架け渡された複数の小梁１４と、下梁１３間に架設された複数の根太１５とを備えている。骨組み４内には、天井面材１６、床面材１７、図示しない内壁パネルおよび間仕切パネル等が適宜組み込まれて内装が施されている。
また、図１にも示すように、建物１の外壁を構成する建物ユニット３には、その骨組み４の側面にＡＬＣやＰＡＬＣ等の軽量気泡コンクリートからなる矩形板状の外壁材６が取り付けられている。このうち、建物１の角隅部、つまり、建物１の出隅部１Ａおよび入隅部１Ｂに配置される建物ユニット３には、その骨組み４の角隅部に、平面視で略Ｌ字状の角隅部用外壁材７が取り付けられている。
【００１５】
このような建物ユニット３を積層配列することで、各建物ユニット３の外壁材６，７は上下左右に並設され、これらの並設された外壁材６，７によってユニット式建物１の外壁が構成されている。
本実施形態の外壁においては、上下に隣接する外壁材６の間、外壁材７の間に各々横目地部８が形成され、左右に隣接する外壁材６の間、外壁材６，７の間にそれぞれ縦目地部９が形成されている。
【００１６】
上下に隣接した外壁材６の間に形成される横目地部８には、図３に示すように、当該横目地部８に沿って水を流すための樋状部２１を備えた横目地部材２０が設置され、上下の外壁材６Ａ，６Ｂに圧接されている。
横目地部材２０は、横目地部８の長手方向に連続した形状を有し、図４にも示すように、下側の外壁材６Ｂの上端面に密着固定される板状の横目地用基部２２と、この横目地用基部２２に長手方向に沿って上方に突設される二列の屋内側リップ状部２３および屋外側リップ状部２４と、横目地用基部２２の屋内側の端部に突設された突出部２７とを有して一体的に形成されている。
このような横目地部材２０のうち、屋外側リップ状部２４を除いた主な部分は、弾性を有する硬質の材料、具体的には、ＥＰＤＭ（エチレンプロピレンジエンラバー）により形成されている。
【００１７】
横目地用基部２２は、その下部に接着された両面テープ２５を介して下側の外壁材６Ｂに接着固定されている。両面テープ２５は、弾力性および防水性を有するブチルゴム系或いは天然ゴム系の材料からなる基材の両面に流性を有する粘着材を設けたものであり、横目地用基部２２および下側の外壁材６Ｂに挟み込まれることによって弾性変形し、外壁材６Ｂの上端面および横目地用基部２２に十分に密着固定されている。これにより、横目地用基部２２は下側の外壁材６Ｂに面接触していてもその間からの毛管現象による水の浸入を阻止できる。
また、外壁材６Ａ，６Ｂに圧縮されることにより、横目地部材２０がＵ字状に撓んでその横目地用基部２２がめくれ上がるのを防止するために、両面テープ２５は、横目地用基部２２の屋外側の端面近傍まで貼られている。なお、この両面テープ２５は、横目地用基部２２の屋外側の端面に達するように貼ってもよい。
【００１８】
このような横目地用基部２２に立設された屋内側リップ状部２３および屋外側リップ状部２４の間は、樋状部２１とされている。
この樋状部２１の底面、つまり、横目地用基部２２の上面のうち一対のリップ状部２３，２４の間の部分である樋状部底面２６には、屋内側リップ状部２３から屋外側リップ状部２４に向かう下り勾配が形成され、水が樋状部２１内の屋外側の部分に沿って流れるようになっている。
また、屋外側リップ状部２４は、屋内側リップ状部２３よりも軟質の材料、具体的には、ＣＳＭ（クロロスルホン化ポリエチレン）からなり、美観を確保するために、外壁材６，７と略同じ色に形成され、外壁材６，７と略同じ質感にするためのエンボス加工が施されている。この屋外側リップ状部２４は、横目地用基部２２の屋外側の端面を覆うように設けられている。
本実施形態の横目地部材２０は、このＣＳＭおよび前述したＥＰＤＭを用いて、一体的に押出し成形すること等により成形されている。
【００１９】
このような屋外側リップ状部２４には、屋内側リップ状部２３に向かって突出する支持用突起３０が設けられ、この支持用突起３０の突出方向先端には、上方に突出して上側の外壁材６Ａの下端面に圧接される上側支持片３１と、下方に突出して横目地用基部２２に結合された下側支持片３２とが設けられている。これらの支持片３１，３２は、外壁材６Ａ，６Ｂに挟み込まれて圧縮されるため、横目地用基部２２は、下側支持片３２との結合部分で、下側の外壁材６Ｂに対して押圧されるようになる。
このような支持片３１，３２により、樋状部２１内の空間は、屋内側と屋外側とに区画され、このうち、屋外側の空間は、支持用突起３０によって上下に分割されている。
【００２０】
この支持用突起３０には、その中間部分を上下に貫通する排水孔３３が設けられ、この排水孔３３から、支持用突起３０よりも下側の空間に水を導入できるようになっている。
排水孔３３は、表面張力が働かない程度の大きさの長孔状に形成され、支持用突起３０の剛性を確保できるように、支持用突起３０の長手方向に沿って間欠的に設けられている。
【００２１】
屋内側リップ状部２３および突出部２７の間には、樋状部２１と平行な排水溝２８が形成され、樋状部２１から屋内側リップ状部２３を越えて屋内側に浸入した水を捕捉できるようになっている。
また、突出部２７は、一対のリップ状部２３，２４よりも低い高さ、具体的には、上側の外壁材６Ａの下端面に接触しない高さに形成されている。これにより、突出部２７および上側の外壁材６Ａの間からの毛管現象による浸水を確実に防止できる。
【００２２】
このように構成された横目地部材２０は、図５に示すように、外壁材６Ａ，６Ｂに上下から挟み込まれている。
屋内側リップ状部２３および屋外側リップ状部２４は、弾性変形して、その各先端は、上側の外壁材６Ａの下端面に圧接されて隙間なく密着している。
支持用突起３０の上側支持片３１の先端は上側の外壁材６Ａの下端面に圧接されて密着している。これにより、横目地用基部２２は、下側支持片３２との接合部分で下側の外壁材６Ｂに対して押圧されている。
また、支持用突起３０は、屋外側リップ状部２４の中央部分が屋内側に撓むように接続されているので、外壁材６Ａ，６Ｂにより挟み込んだときに、屋外側リップ状部２４の上端部が屋内側に折れ曲がることないから、防水性を損うことなく設置できる。
【００２３】
図１に戻って、ユニット式建物１の入隅部１Ｂにおいて、上下に積層された角隅部用の外壁材７の間に形成された横目地部８には、図６に示すように、平面視で略Ｌ字状に湾曲した形状にした以外は、前述した横目地部材２０と略同様な横目地部材８０が設けられている。
なお、この横目地部材８０の説明にあたって、前述した図３〜図５と同じ構成要素については同一符号を付し、その説明を省略もしくは簡略化する。
下側の外壁材７（上側の外壁材については図示省略）の上端の屋内側のコーナー部には切欠き部７１が形成され、外壁材７を柱１１（図２参照）に固定するブラケット７２を取り付けるようになっている。
【００２４】
横目地部材８０は、平面視で略Ｌ字状に形成され、その角部は湾曲した形状とされ、これにより、横目地部材８０の角部のうち最も屋内側に出っ張る頂部８０Ａは、外壁材７の上端面に支持され、下方に撓まないようになっている。
このような横目地部材８０の角部において、樋状部８１および排水溝８８は湾曲しており、この湾曲に沿って水が流通するようになっている。
また、排水溝８８から水が屋内側に溢れ出すのを防止するために、当該排水溝８８を構成する突出部８７は、前述した横目地部材２０の突出部２７（図３〜図５参照）よりも、上方への突出高さが高くされ、排水溝８８の容積が拡張されている。
さらに、上側支持片３１の上端部には、毛管現象等による屋内側への水の浸入を抑制するために、ブチルゴムを主成分とする粘着材８９が設けられ、上側の外壁材（図示省略）に密着するようになっている。
【００２５】
一方、図７および図８に示すように、左右に隣接した外壁材６Ａの間、外壁材６Ｂの間に形成された縦目地部９には、樋状部２１および排水溝２８に連通する排水路４０が設けられ、樋状部２１に沿って流れてきた水を排水路４０を通じて下方に流し落とすようになっている。
この排水路４０は、縦目地部９に屋外側から圧入された縦目地部材４１により形成され、縦目地部９のうち、縦目地部材４１から屋内側の部分で排水するようになっている。
【００２６】
縦目地部材４１は、縦目地部９に係止される縦目地係止部４２と、この縦目地係止部４２の屋外側の端部に設けられて縦目地部９を塞ぐ縦目地止水部４３とを備えている。
縦目地係止部４２は、弾性を有する硬質の材料、具体的には、ＥＰＤＭにより形成され、図９にも示すように、縦目地部９内に挿入される挿入部５１と、この挿入部５１から左右の外壁材６Ａ，６Ｂの各側端面に向かって突出した封止片５２とを有して構成されている。これらの封止片５２は、縦目地部材４１を縦目地部９に圧入したときに、弾性変形してその突出方向先端部が各外壁材６Ａ，６Ｂの側端面に圧接され、これにより、縦目地部９に係止されるようになっている。
【００２７】
縦目地止水部４３は、縦目地係止部４２よりも軟質の材料、具体的には、ＣＳＭからなり、美観を確保するために、外壁材６，７と略同じ色に形成され、外壁材６，７と略同じ質感にするためのエンボス加工が施されている。
これらの材質からなる本実施形態の縦目地部材４１は、ＣＳＭおよび前述したＥＰＤＭを用いて、縦目地係止部４２および縦目地止水部４３を一体的に押出し成形すること等により成形されている。
【００２８】
この縦目地止水部４３は、挿入部５１の屋外側の端面を覆うように設けられた止水面５３と、この止水面５３の幅方向（縦目地部９の長手方向と直交する方向）端部および挿入部５１の中間部分をそれぞれ連結する連結面５４とを備え、挿入部５１の屋外側の端部を含んで、縦目地９の長手方向に連続した矩形筒状に形成されている。
連結面５４には、横目地部材２０の長手方向端面に沿う平面部５４Ａが形成されている。この平面部５４Ａは、外壁材６Ａ，６Ｂの各側端面に圧接されるとともに、横目地部８および縦目地部９の交差部分においては、横目地部材２０の屋外側リップ状部２４の長手方向端面に圧接されて密着するようになっている。
【００２９】
また、図７および図８に示すように、横目地部８および縦目地部９の交差部分には、横目地部材２０および縦目地部材４１よりも屋内側に、柔軟性を有する発泡体からなるバックアップ材６０が配置されている。
このバックアップ材６０は、縦目地部９を横断して横目地部８に配置された横止水部６１と、この横止水部６１から縦目地部９に沿って下方に延びる縦止水部６２とを有して略Ｔ字状に形成されている。
この縦止水部６２の屋外側の面６２Ａの下部には、屋外側に向かう下り傾斜が付けられている。縦止水部６２の傾斜方向下端部は、縦目地部材４１に当接され、バックアップ材６０の屋外側の面６２Ａに沿って流れた落ちた水を、縦目地部材４１に伝わせて排水できるようになっている。
また、バックアップ材６０の屋内側の面は、外壁材６Ａ，６Ｂの屋内側の面と平行に形成され、これらの外壁材６Ａ，６Ｂの屋内側の面と面一になるように設置されている。
【００３０】
このようなバックアップ材６０は、目地部８，９の交差部分において、下側で左右に隣接した外壁材６Ｂにそれぞれ取り付けられた一対の止水ブロック６０Ａ，６０Ｂにより構成されている。これらの止水ブロック６０Ａ，６０Ｂは、互いに対称な略Ｌ字状に形成され、それぞれ前記隣接した外壁材６Ｂの対向する各角部に取り付けられ、外壁材６Ｂを隣接配置した状態で互いに密着している。
【００３１】
なお、図示しないが、左右に隣接した外壁材６，７の間に形成された縦目地部９にも、同様な構造の排水路が形成されている。
【００３２】
本実施形態においては、次のような手順で横目地部８および縦目地部９の防水処理を行う。
先ず、長尺に成形して巻き取っておいた横目地部材２０を横目地部８の長手方向寸法、つまり、外壁材６の上端面の長手方向寸法に応じた長さに切断し、これとは別に、入隅部用に略Ｌ字状に形成した横目地部材８０を用意しておく。
また、縦目地部材４１も予め長尺に成形して巻き取っておき、一階および二階部分の縦目地部９を連続して塞ぐ長さに切断する。
【００３３】
そして、ユニット式建物１の一階部分に配置される建物ユニット３の外壁材６，７の上端面、つまり、横目地部８を構成する下側の外壁材６Ｂ，７の上端面に、両面テープ２５によって横目地部材２０，８０を密着固定する。
このとき、樋状部２１にはその長手方向に沿った勾配が形成される。すなわち、外壁材６を骨組み４に通常の作業で取り付けた場合、その上端面を厳格に水平面に保った状態で取り付けることは困難である。そこで、その取付け時に生じる傾きを利用して樋状部２１に長手方向に沿った勾配を形成できる。
【００３４】
また、一階の建物ユニット３の外壁材６，７の側端面の上端部、つまり、目地部８，９の交差部分において下側となる外壁材６Ｂ，７の各側端面の上端部には、止水ブロック６０Ａ，６０Ｂを密着固定する。このとき、止水ブロック６０Ａ，６０Ｂを正確に位置決めするために、止水ブロック６０Ａ，６０Ｂの屋内側の面が外壁材６Ｂ，７の各屋内側の面と面一になるように設置する。
【００３５】
これらの横目地部材２０，８０および止水ブロック６０Ａ，６０Ｂの取付けは、建物ユニット３の組立てとともに工場で予め行ってもよく、建設現場において建物ユニット３を施工する際に行ってもよい。
【００３６】
次に、建設現場において建物ユニット３を基礎２上に順次積層配列する。
この際、一階の建物ユニット３を水平方向に隣接配置すると、左右に並列配置された外壁材６Ｂの間で、止水ブロック６０Ａ，６０Ｂが互いに密着するとともに、止水ブロック６０Ａ，６０Ｂの設置時に若干の傾きが生じても、これらの止水ブロック６０Ａ，６０Ｂからなるバックアップ材６０の屋外側の面６２Ａには、屋外側に向かう下り勾配が形成される。
そして、一階の建物ユニット３の上に二階の建物ユニット３を積層すると、上下に隣接配置される外壁材６Ａ，６Ｂの間、外壁材７の間で、それぞれ横目地部材２０，８０の屋内側リップ状部２３、屋外側リップ状部２４および支持片３１，３２が弾性変形して、その各上端部が上側の外壁材６Ａ，７の下端面に圧接されるようになる。
また、バックアップ材６０が上側の外壁材６Ａ，７により押圧されて弾性変形し、その横止水部６１が上下の外壁材６Ａ，６Ｂ，７に密着する。
【００３７】
この後、縦目地部材４１を縦目地部９に屋外側から圧入して、バックアップ材６０の屋外側の面６２Ａの傾斜方向下端部に当接させる。すると、縦目地部材４１の縦目地止水部４３は弾性変形して、その平面部５４Ａが横目地部材２０，８０の屋外側リップ状部２４の長手方向端面に追従するようになり、互いに柔軟性を有するため、隙間なく密着するようになる。
【００３８】
このように構成された本実施形態の外壁の目地構造では、横目地部８において、雨水のほとんどは屋外側リップ状部２４で遮られ、この屋外側リップ状部２４を越えて屋内側に浸入した雨水は、樋状部２１，８１で捕捉され、この樋状部２１，８１に沿って排水路４０まで流れるようになる。
【００３９】
横目地部材２０において、樋状部２１で捕捉された水は、横目地部材２０の設置時に樋状部底面２６に形成された長手方向の勾配に従って、上下の外壁材６Ａ，６Ｂの間を横目地部８の長手方向に沿って流れる。このとき、水は樋状部底面２６の屋外側に向かう下り勾配により樋状部２１内の屋外側の部分を流れる。
【００４０】
具体的には、屋外側リップ状部２４および上側の外壁材６Ａの間から浸入した雨水は、先ず、上側支持片３１で止水されて、支持用突起３０の上面を流れて、排水孔３３から支持用突起３０よりも下側の空間、つまり、下側支持片３２および屋外側リップ状部２４の間の空間を通じて排水路４０まで導かれる。
この支持用突起３０の下側の空間よりも水量が多く、排水孔３３から水が溢れた場合、水は、支持用突起３０よりも上側の空間、つまり、上側支持片３１および屋外側リップ状部２４の間の空間を通じて流れるようになる。
そして、上側支持片３１および上側の外壁材６Ａの間から屋内側に浸入した雨水は、屋内側リップ状部２３で止水され、樋状部２１のうち、屋内側リップ状部２３および支持片３１，３２の間の空間を通じて、排水路４０まで導かれる。
【００４１】
毛管現象等により、樋状部２１よりも屋内側に浸入した水、つまり、屋内側リップ状部２３および上側の外壁材６Ａの間から屋内側に浸入した雨水は、突出部２７により止水され、排水溝２８を通じて排水路４０に導入される。
この突出部２７は、上側の外壁材６Ａに接触していないので、この突出部２７および外壁材６Ａの間から毛管現象によって屋内側に浸水することはない。
【００４２】
また、入隅部用の横目地部材８０においても、横目地部材２０の場合と同様に、雨水は、樋状部８１および排水溝８８に沿って排水路４０に導入される。
このとき、横目地部材８０の角部は湾曲しているため、外壁材７の切欠き部７１に被さる部分が少ないうえ、横目地部材８０の頂部８０Ａは、下側の外壁材７の上端面に支持されているので、横目地部材８０の角部が下方に垂れ下がることがないから、樋状部８１の角部における水の滞留を防止できる。また、排水溝８８の容積は拡大されているため、樋状部８１よりも屋内側に浸入する雨水の量が多くても、排水溝８８を通じて確実に排水することができる。
【００４３】
このように樋状部２１，８１および排水溝２８，８８を流れた水は、横目地部８および縦目地部９の交差部分で排水路４０に導入され、この排水路４０に沿って流れ落ちて排水される。具体的には、縦目地部９において、雨水は、縦目地部材４１の縦目地止水部４３よりも屋内側の部分を流れるようになる。
この目地部８，９の交差部分において、樋状部２１，８１および排水溝２８，８８から、縦目地部材４１よりも屋内側の部分に導入された水は、バックアップ材６０により止水され、その屋外側の面６２Ａを伝わって、その傾斜に沿って屋外側に導かれる。そして、縦止水部６２の屋外側の面６２Ａに沿って流れた水は、その傾斜方向下端部から縦目地部材４１の縦目地係止部４２を伝わって下方に流し落とされる。これにより、雨水は、バックアップ材６０および縦目地部材４１の間を自然落下することがなくなるので、雨水のバックアップ材６０よりも屋内側への浸入を防止できる。
【００４４】
一方、縦目地部９においては、雨水のほとんどは縦目地部材４１の縦目地止水部４３により遮断される。縦目地止水部４３を越えて縦目地部９に浸入した水はそのまま排水路４０に導入されて下方に流し落とされる。
【００４５】
このような本実施形態によれば、以下のような効果がある。
すなわち、バックアップ材６０の屋外側の面６２Ａには、屋外側に向かう下り傾斜が付けられているため、横目地部８および縦目地部９の交差部分において、バックアップ材６０により止水された雨水は、その屋外側の面６２Ａの下り傾斜に沿って屋外側に向かって流れ落ちるので、雨水が屋内側に向かうのを防止できるから、優れた防水性を確保できる。
また、バックアップ材６０には、予め屋内側に向かう下り傾斜が付けられているので、バックアップ材６０の設置時の傾きにより、その屋外側の面６２Ａに屋内側に向かう下り傾斜が形成されるのを確実に防止できる。従って、設置時の傾きを厳密に管理しなくてもよくなるから、バックアップ材６０を簡単に設置できる。
【００４６】
また、バックアップ材６０の傾斜方向下端部を縦目地部材４１に当接させたため、雨水は、バックアップ材６０の屋外側の面６２Ａに沿って下方に流されてから、縦目地部材４１を伝わって下方に流れ落ちるようになる。従って、バックアップ材６０により止水された水が、当該バックアップ材６０よりも下方で屋内側へ浸入するのを防止できる。
【００４７】
そして、バックアップ材６０は、横止水部６１および縦止水部６２を有して略Ｔ字状に形成されているので、横目地部材２０，８０の途切れた部分を屋内側から確実に覆うことができるから、優れた防水効果が得られる。
【００４８】
さらに、バックアップ材６０は、左右に隣接した外壁材６Ｂ，７にそれぞれ取り付けられた一対の止水ブロック６０Ａ，６０Ｂからなるものであるため、止水ブロック６０Ａ，６０Ｂを予め各外壁材６Ｂ，７に取り付けておけば、外壁材６Ｂ，７を並設するだけで、横目地部８および縦目地部９の交差部分にバックアップ材６０を簡単に設置できる。
また、止水ブロック６０Ａ，６０Ｂは互いに密着しているため、これらのブロック６０Ａ，６０Ｂ間からの雨水の浸入を確実に防止できる。
【００４９】
そして、バックアップ材６０の屋内側の面は、外壁材６，７の屋内側の面と平行にされているので、止水ブロック６０Ａ，６０Ｂを外壁材６，７の屋内側の面と面一になるように配置するだけで、外壁材６，７に対して簡単に位置決めできるから、バックアップ材６０の設置を一層容易化できる。
【００５０】
また、バックアップ材６０は、発泡体からなるものであるため、柔軟性を確保できるので、バックアップ材６０が弾性変形して外壁材６，７に追従するようになるから、バックアップ材６０および外壁材６，７の間に優れた水密性を確保できる。
【００５１】
さらに、横目地部材２０，８０では、横目地用基部２２に立設されたリップ状部２３，２４の間が樋状部２１，８１とされているので、雨水のほとんどを屋外側リップ状部２４で遮ることができるうえ、この屋外側リップ状部２４を越えて屋内側に浸入した雨水は、樋状部２１，８１を通じて排水できるから、横目地部材２０，８０よりも屋内側への水の浸入を確実に防止できる。
また、リップ状部２３，２４は上側の外壁材６Ａ，７の下端面に圧接されるので、横目地部材２０，８０と上側の外壁材６Ａ，７との間で高い防水性を確保できる。
【００５２】
さらに、横目地部材２０，８０の設置にあたっても、横目地用基部２２を下側の外壁材６Ｂ，７の上端面に密着固定しておき、この下側の外壁材６Ｂ，７上に上側の外壁材６Ａ，７を配置して横目地部材２０，８０を挟み込むだけでよいので、簡単に設置できる。
そして、横目地用基部２２は板状に形成されているので、下側の外壁材６Ｂ，７の上端面に大面積で密着固定でき、横目地用基部２２と下側の外壁材６Ｂ，７との間に優れた防水性が得られる。
【００５３】
そして、樋状部底面２６には、屋外側に向かう下り勾配が形成されているので、水が樋状部２１，８１の各空間の屋外側の部分に沿って流れるようになり、屋内側に向かうのを防止できるので、横目地部８の防水性を一層高めることができる。
【００５４】
さらに、横目地用基部２２の屋内側端部には、突出部２７，８７が立設されているので、毛管現象により屋内側リップ状部２３を越えて屋内側に浸入した水を突出部２７，８７で止水でき、排水溝２８，８８に沿って確実に排水できるので、優れた防水効果を期待できる。
【００５５】
そして、屋外側リップ状部２４には、上側支持片３１および下側支持片３２を有する支持用突起３０が突設されているため、下側支持片３２によって横目地用基部２２が下側の外壁材６Ｂの上端面に押圧されるから、横目地用基部２２と下側の外壁材６Ｂとの密着性を高めることができる。
【００５６】
また、下側支持片３２は横目地用基部２２に連結されているため、その連結部分で横目地用基部２２を確実に押圧することができるうえに、横目地部８に設置したときに屋外側リップ状部２４を屋内側に撓んだ姿勢に確実に保持できる。
【００５７】
さらに、支持用突起３０には排水孔３３が形成されているので、この排水孔３３から支持用突起３０よりも下側の空間にも雨水を導くことができるようになり、支持用突起３０の上側支持片３１を越えて屋内側に浸入する水の量を少なくできるから、防水効果を高めることができる。
また、支持用突起３０よりも下側の空間にも雨水を流通させることができるため、樋状部２１，８１の空間を有効利用できる。従って、樋状部２１，８１で捕捉可能な水量を増やせるから、水量が多い場合でも、樋状部２１，８１からの水の溢れを抑制できる。
とくに、横目地部材２０では、排水性の悪い長手方向の中間部分において樋状部２１に流通可能な水量を多くできるので、優れた防水性が得られる。
【００５８】
そして、入隅部１Ｂ用の横目地部材８０の角部の屋内側の部分は湾曲しているため、横目地部材８０の角部のうち、外壁材７の上端の切欠き部７１に被さる部分を少なくすることができるうえ、頂部８０Ａを外壁材７に支持させることができるので、横目地部材８０の角部の下方への撓みを防止できる。従って、樋状部８１の角部における水の滞留を防止できるため、優れた防水性を確保できる。
また、樋状部８１において、その角部に向かって雨水が流れても、この雨水を角部の湾曲に沿って樋状部８１の端部まで円滑に流通させることができるので、樋状部８１の角部における雨水の滞留およびオーバーフローを防止できるから、防水性を向上できる。
【００５９】
さらに、入隅部１Ｂ用の横目地部材８０の上側支持片３１には、上側の外壁材７に密着する粘着材８９が設けられているので、この粘着材８９を介して上側支持片３１を上側の外壁材７に確実に密着させることができる。従って、上側支持片３１および上側の外壁材７の間から屋内側に水が浸入するのを抑制できるから、防水効果を高めることができる。
また、粘着材８９はブチルゴムを主成分とするものであるため、優れた耐候性を確保できる。
【００６０】
そして、縦目地部９には排水路４０が設けられているので、樋状部２１，８１および排水溝２８，８８に沿って流れてきた水を排水路４０を通じて確実に流し落とすことができるため、良好な防水性が得られる。
また、本実施形態の排水路４０は、縦目地部材４１を圧入するだけで簡単に形成できる。
【００６１】
さらに、縦目地部材４１は、縦目地部９を塞ぐ縦目地止水部４３を有するため、縦目地部９から浸入しようとする雨水のほとんどを縦目地止水部４３によって遮ることができるうえ、縦目地止水部４３を越えて屋内側に侵入した水は排水路４０を通じて下方に流すことができるから、縦目地部９に良好な防水性を確保できる。
【００６２】
また、縦目地止水部４３は、縦目地係止部４２よりも軟質の材料であるＣＳＭからなるため、容易に変形して横目地部材２０，８０の端面に追従するようになり、縦目地止水部４３を横目地部材２０，８０の端面、具体的には、屋外側リップ状部２４の端面に密着させることができる。従って、横目地部材２０および縦目地部材４１の接続部分からの浸水を確実に防止できるため、優れた防水性を確保できる。
さらに、横目地部材２０，８０の屋外側リップ状部２４も軟質のＣＳＭにより形成されているので、この屋外側リップ状部２４の端面に縦目地止水部４３を圧接させたときに容易に変形して縦目地止水部４３の平面部５４Ａに追従すから、優れた密着性を確保でき、防水性を一層向上できる。
【００６３】
そして、縦目地止水部４３は筒状に形成されているため、その長手方向と直交する方向に大きく変形させることができるから、より優れた柔軟性が得られ、横目地部材２０，８０の端面に一層確実に追従させることができる。
【００６４】
また、縦目地止水部４３は、横目地部材２０，８０の端面に沿う平面部５４Ａを有するため、屋外側リップ状部２４が撓んでいても、平面部５４Ａを屋外側リップ状部２４の長手方向端面に確実に面接触させることができるので、屋外側リップ状部２４と縦目地止水部４３とを隙間なく接続できるから、優れた防水性を確保できる。
【００６５】
なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる他の構成等を含み、以下に示すような変形なども本発明に含まれる。
すなわち、前記実施形態では、バックアップ材６０の屋外側の面６２Ａの下部に屋外側に向かう下り傾斜を付けたが、屋外側の面の全面に下り傾斜を付けてもよい。
また、バックアップ材は、一対の止水ブロックからなるものに限定されず、三つ以上の止水ブロックにより構成してもよく、或いは、一体的に形成してもよい。
【００６６】
そして、前記実施形態では、縦目地部材４１の縦目地止水部４３を筒状に形成したが、中実に形成してもよく、これによると、横目地部材の端面への追従性は若干低下するが、剛性が高められるので、縦目地部材の圧入作業を容易化できる。
さらに、前記実施形態の入隅部用の横目地部材８０の角部は、全体的に湾曲した形状を有していたが、屋内側の部分だけ湾曲させて、屋外側の部分は屈曲した形状としてもよい。
【００６７】
また、前記実施形態の外壁材６，７は、比較的厚く形成される軽量気泡コンクリート製であったが、これよりも薄いサイディング材等により外壁材を形成してもよい。しかし、本発明は外壁材と外壁材との間の空間を利用して水を流す構造であるため、外壁材は厚い方が好ましい。
さらに、以上に述べた実施形態では、ユニット式建物の外壁の目地構造について説明したが、本発明は、ユニット式建物の外壁に限定されず、複数の外壁材を並設した外壁であれば、ユニット工法以外の工法によって建てられた建物の外壁にも適用できる。例えば、本発明は、鉄骨軸組みフレーム等に外壁材を並べて取り付けた外壁等に適用してもよい。
【００６８】
【発明の効果】
以上に述べたように、本発明によれば、バックアップ材の屋外側の面には、屋外側に向かう下り傾斜が付けられているため、横目地部および縦目地部の交差部分でバックアップ材により止水された雨水は、その屋外側の面の下り傾斜に沿って屋外側に流れ落ちるから、優れた防水性を確保できる。
また、バックアップ材には、予め屋内側に向かう下り傾斜が付けられているので、設置時のバックアップ材の傾きによって、屋外側の面に屋内側に向かう下り傾斜が形成されるのを防止できる。従って、従来の角柱状のバックアップ材のように、設置時の傾きを厳密に管理しなくてもよくなるから、バックアップ材を簡単に設置できる。
【図面の簡単な説明】
【図１】本発明の一実施形態を示す斜視図。
【図２】前記実施形態の建物ユニットを一部破断して示す斜視図。
【図３】前記実施形態の横目地部材を示す斜視図。
【図４】前記実施形態の横目地部材を示す図。
【図５】前記実施形態の横目地部材の設置状態を示す断面図。
【図６】前記実施形態の入隅部用の横目地部材を示す斜視図。
【図７】前記実施形態の横目地部および縦目地部の交差部分を示す斜視図。
【図８】前記実施形態の横目地部および縦目地部の交差部分を示す分解斜視図。
【図９】前記実施形態の縦目地部材を示す図。
【符号の説明】
１ユニット式建物
１Ｂ入隅部
６，６Ａ，６Ｂ外壁材
７外壁材
８横目地部
９縦目地部
２０，８０横目地部材
２１，８１樋状部
２３屋内側リップ状部
２４屋外側リップ状部
３０支持用突起
３１上側支持片
３２下側支持片
３３排水孔
４０排水路
４１縦目地部材
４２縦目地係止部
４３縦目地止水部
５４Ａ平面部
６０バックアップ材
６０Ａ，６０Ｂ止水ブロック
６１横止水部
６２縦止水部
８９粘着材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of an outer wall in which a plurality of outer wall materials are arranged side by side vertically and horizontally.
[0002]
[Background]
An outer wall of a building such as a house is generally formed by arranging outer wall materials such as siding materials side by side on a frame made of steel or wood.
In addition, in the unit construction method in which a plurality of building units are manufactured in advance in a factory and these are combined at a construction site to construct a building, the outer wall made of lightweight cellular concrete such as ALC or PALC is used when the building unit is manufactured in the factory. The material is assembled to a box-shaped frame composed of columns and beams. By stacking and arranging the building units to which the outer wall material is attached at the construction site, the outer wall materials are juxtaposed to form the outer wall of the building.
[0003]
Thus, in the outer wall in which outer wall materials such as siding material and lightweight cellular concrete are arranged side by side in the vertical and horizontal directions, joint portions are formed between adjacent outer wall materials, so that it is necessary to waterproof the joint portions. .
As a waterproofing treatment for joints, the present applicant provides a horizontal joint member provided with a hook-like part in the horizontal joint formed between the upper and lower adjacent outer wall materials, and between the outer wall materials adjacent to the left and right. A method was proposed in which a drainage channel was provided in the formed vertical joint, and rainwater was allowed to flow along the hook-shaped portion of the horizontal joint member and then flowed down through the drainage channel of the vertical joint (Japanese Patent Application No. 9-82709). ). In this structure, since the horizontal joint member is interrupted at the intersection of the horizontal joint portion and the vertical joint portion, a prismatic waterproof block as a backup material is arranged on the indoor side from the horizontal joint member of this intersection portion, Water is stopped at the outdoor side.
[0004]
[Problems to be solved by the invention]
However, it is extremely difficult to install the waterproof block strictly horizontally at the joint, and depending on the installation state (inclination method) of the waterproof block, a downward slope toward the indoor side is formed on the outdoor side surface. In some cases, rainwater flows to the indoor side along the outdoor side surface, and there is a possibility that the waterproof property is lowered.
In addition, when installing the waterproof block, it is necessary to strictly manage the inclination of the waterproof block so that such an inclination does not occur.
[0005]
The objective of this invention is providing the joint structure of the outer wall which can ensure sufficient waterproofness and can install a backup material easily.
[0006]
[Means for Solving the Problems]
Referring to the drawings, the present invention is a joint structure of an outer wall in which a plurality of outer wall members 6 and 7 are arranged side by side in the vertical and horizontal directions, and a horizontal joint portion 8 formed between upper and lower adjacent outer wall materials. Is provided with horizontal joint members 20 and 80 having ridges 21 and 81 for allowing water to flow along the horizontal joint part 8, and is formed between the left and right outer wall members. 9 is provided with a drainage channel 40 for dropping water from the bowl-shaped portion downward, and at the intersection of the horizontal joint portion and the vertical joint portion, a block-like backup material 60 is provided on the indoor side of the horizontal joint member. The back surface of the backup material is provided with a downward slope toward the outdoor side, and the back-up material has upper end surface portions of the outer wall materials adjacent to the left and right, and the outer wall materials are mutually connected. it at each corner of the opposing surface portion which faces are respectively formed It consists of a pair of symmetrical L-shaped water blocking blocks that are attached to each other, and these water blocking blocks are arranged in close contact with each other so as to cross the vertical joint and to the horizontal joint. It has a transverse water stop portion disposed in close contact with each of the outer wall materials arranged above and below, and a vertical water stop portion extending downward from the transverse water stop portion along the vertical joint portion, and is substantially T-shaped. It is arranged .
[0007]
In the present invention, since the outdoor side surface of the backup material is inclined downward toward the outdoor side, the rainwater stopped by the backup material at the intersection of the horizontal joint portion and the vertical joint portion is stored in the store. Since it flows down toward the outdoor side along the downward slope of the outer surface, excellent waterproof properties can be secured.
In addition, since the backup material is preliminarily inclined downward toward the indoor side, when the backup material is installed in a normal operation, the downward inclination toward the indoor side on the outdoor side surface is caused by the inclination at the time of installation. It is possible to reliably prevent the formation. Therefore, unlike the conventional prismatic backup material, it is not necessary to strictly manage the inclination at the time of installation, so that the backup material can be easily installed.
Furthermore, since the backup material is arranged in a substantially T shape, the interrupted portion of the horizontal joint member can be reliably covered from the indoor side, so that an excellent waterproof effect can be obtained.
In addition, since the back-up material is composed of a pair of water blocking blocks, the water blocking blocks can be attached to the respective outer wall materials in advance, so that the horizontal joint portion and the vertical joint portion can be simply arranged in parallel. Backup material can be easily installed at the intersection of
Further, since the pair of water blocking blocks are in close contact with each other, it is possible to reliably prevent rainwater from entering between these blocks.
[0008]
Further, when the vertical joint member 41 constituting the drainage channel is press-fitted into the vertical joint portion from the outdoor side, the lower end portion in the inclination direction of the surface on the outdoor side of the backup material is in contact with the vertical joint member. Is desirable.
[0009]
When the lower end portion in the inclination direction of the backup material is brought into contact with the vertical joint member, rainwater flows downward along the outdoor side surface of the backup material, and then flows down through the vertical joint member. Therefore, the water stopped by the backup material can be prevented from entering the indoor side below the backup material.
[0012]
In the above, it is desirable that the indoor side surface of the backup material be parallel to the indoor side surface of the outer wall material.
In this way, the backup material can be easily positioned with respect to the outer wall material simply by arranging the backup material so as to be parallel to the indoor side surface of the outer wall material.
[0013]
In addition, the backup material is preferably made of a foam. According to this, the backup material can ensure flexibility, and the backup material elastically deforms and follows the outer wall material regardless of the shape and size of the joint. Therefore, excellent water tightness can be secured between the backup material and the outer wall material.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a two-story unit type building 1. The unit building 1 is constructed by stacking a plurality of box-shaped building units 3 on a foundation 2 and providing a roof (not shown) on the building units 3.
As shown in FIG. 2, the building unit 3 includes four columns 11, an upper beam 12 that connects the upper ends of the four columns 11, and a lower beam 13 that connects the lower ends of the four columns 11. The frame 4 includes a rectangular parallelepiped shape, a plurality of small beams 14 bridged between the upper beams 12, and a plurality of joists 15 laid between the lower beams 13. Inside the framework 4, a ceiling surface material 16, a floor surface material 17, an inner wall panel and a partition panel (not shown) and the like are appropriately incorporated to provide an interior.
Further, as shown in FIG. 1, the building unit 3 constituting the outer wall of the building 1 has a rectangular plate-like outer wall material 6 made of lightweight cellular concrete such as ALC or PALC attached to the side surface of the framework 4. Yes. Among these, the corners of the building 1, that is, the building units 3 arranged at the projecting corners 1 A and the entrance corners 1 B of the building 1 are substantially L-shaped in plan view at the corners of the framework 4. The corner wall outer wall material 7 is attached.
[0015]
By arranging such building units 3 in a stacked arrangement, the outer wall materials 6 and 7 of each building unit 3 are arranged side by side in the vertical and horizontal directions, and the outer walls of the unit type building 1 are formed by these arranged outer wall materials 6 and 7. It is configured.
In the outer wall of the present embodiment, horizontal joint portions 8 are formed between the outer wall materials 6 that are vertically adjacent to each other and between the outer wall materials 7, respectively, between the outer wall materials 6 that are adjacent to the left and right, and between the outer wall materials 6 and 7. The vertical joint portions 9 are formed respectively.
[0016]
As shown in FIG. 3, the horizontal joint member 8 provided between the upper and lower outer wall members 6 includes a horizontal joint member 21 having a hook-like portion 21 for flowing water along the horizontal joint portion 8. 20 is installed and is pressed against the upper and lower outer wall materials 6A and 6B.
The horizontal joint member 20 has a shape that is continuous in the longitudinal direction of the horizontal joint portion 8, and as shown in FIG. 4, a plate-shaped base portion for the horizontal joint that is tightly fixed to the upper end surface of the lower outer wall member 6B. 22, two rows of indoor-side lip-shaped portions 23 and outdoor-side lip-shaped portions 24 projecting upward along the longitudinal direction of the horizontal joint base portion 22, and the indoor-side end portions of the horizontal joint base portion 22 And a projecting portion 27 projecting from each other.
The main part except the outdoor side lip-shaped part 24 among such horizontal joint members 20 is formed of a hard material having elasticity, specifically, EPDM (ethylene propylene diene rubber).
[0017]
The horizontal joint base 22 is bonded and fixed to the lower outer wall material 6B through a double-sided tape 25 bonded to the lower portion thereof. The double-sided tape 25 is provided with an adhesive material having fluidity on both surfaces of a base material made of a butyl rubber-based or natural rubber-based material having elasticity and waterproofness. It is elastically deformed by being sandwiched between the members 6B, and is sufficiently tightly fixed to the upper end surface of the outer wall member 6B and the horizontal joint base 22. Thereby, even if the horizontal joint base 22 is in surface contact with the lower outer wall material 6B, it is possible to prevent water from entering due to the capillary phenomenon.
Further, the double-sided tape 25 is provided with a base for horizontal joint in order to prevent the horizontal joint member 20 from being bent in a U shape and being turned up by being compressed by the outer wall materials 6A and 6B. 22 is attached to the vicinity of the end face on the outdoor side. The double-sided tape 25 may be attached so as to reach the end face on the outdoor side of the base portion 22 for horizontal joints.
[0018]
Between the indoor side lip-shaped portion 23 and the outdoor-side lip-shaped portion 24 erected on the horizontal joint base portion 22 is a flange-shaped portion 21.
The bottom surface of the bowl-shaped portion 21, that is, the bowl-shaped bottom surface 26 between the pair of lip-shaped portions 23 and 24 of the top surface of the base portion 22 for horizontal joints is connected to the outdoor side from the indoor-side lip-shaped portion 23. A downward slope toward the lip-shaped portion 24 is formed so that water flows along a portion on the outdoor side in the bowl-shaped portion 21.
The outdoor lip portion 24 is made of a softer material than the indoor lip portion 23, specifically, CSM (chlorosulfonated polyethylene). It is formed in substantially the same color and is embossed to make it almost the same texture as the outer wall materials 6 and 7. This outdoor side lip-shaped part 24 is provided so as to cover the end face of the lateral joint base 22 on the outdoor side.
The horizontal joint member 20 of the present embodiment is formed by integrally extruding using this CSM and the above-described EPDM.
[0019]
The outdoor lip portion 24 is provided with a support protrusion 30 that protrudes toward the indoor lip portion 23. The support protrusion 30 protrudes upward at the front end in the protrusion direction and protrudes upward. An upper support piece 31 that is pressed against the lower end surface of the material 6A and a lower support piece 32 that protrudes downward and is coupled to the horizontal joint base 22 are provided. Since these support pieces 31 and 32 are sandwiched and compressed by the outer wall materials 6A and 6B, the horizontal joint base 22 is a joint portion with the lower support piece 32 and is connected to the lower outer wall material 6B. It comes to be pressed.
With the support pieces 31 and 32, the space in the bowl-shaped portion 21 is partitioned into an indoor side and an outdoor side, and among these, the outdoor side space is vertically divided by the support protrusions 30.
[0020]
The support protrusion 30 is provided with a drain hole 33 penetrating up and down the intermediate portion, and water can be introduced into the space below the support protrusion 30 from the drain hole 33.
The drain hole 33 is formed in a long hole shape having a size that does not cause surface tension, and is provided intermittently along the longitudinal direction of the support protrusion 30 so that the rigidity of the support protrusion 30 can be secured. Yes.
[0021]
A drainage groove 28 parallel to the bowl-shaped part 21 is formed between the indoor-side lip-shaped part 23 and the protruding part 27, and water that has entered the indoor side from the bowl-shaped part 21 beyond the indoor-side lip-shaped part 23 can be removed. It can be captured.
Moreover, the protrusion part 27 is formed in the height lower than a pair of lip-like parts 23 and 24, specifically, the height which does not contact the lower end surface of 6 A of upper outer wall materials. Thereby, it is possible to reliably prevent water from entering between the protrusion 27 and the upper outer wall member 6A due to capillary action.
[0022]
As shown in FIG. 5, the horizontal joint member 20 configured in this manner is sandwiched between the outer wall materials 6A and 6B from above and below.
The indoor-side lip-shaped portion 23 and the outdoor-side lip-shaped portion 24 are elastically deformed, and their respective tips are pressed against the lower end surface of the upper outer wall material 6A and are in close contact with each other without any gap.
The tip of the upper support piece 31 of the support protrusion 30 is in pressure contact with and in close contact with the lower end surface of the upper outer wall member 6A. Thereby, the base part 22 for horizontal joints is pressed with respect to the lower outer wall material 6B by the junction part with the lower side support piece 32. FIG.
Further, since the support protrusion 30 is connected so that the center portion of the outdoor side lip-shaped portion 24 bends indoors, the upper end portion of the outdoor-side lip-shaped portion 24 is positioned when sandwiched between the outer wall materials 6A and 6B. Since it does not bend indoors, it can be installed without sacrificing waterproofness.
[0023]
Returning to FIG. 1, in the corner 1 B of the unit type building 1, the horizontal joint portion 8 formed between the outer wall materials 7 for the corners stacked vertically is shown in FIG. 6. A horizontal joint member 80 substantially the same as the above-described horizontal joint member 20 is provided except that the shape is curved in an approximately L shape in plan view.
In the description of the horizontal joint member 80, the same components as those in FIGS. 3 to 5 described above are denoted by the same reference numerals, and the description thereof is omitted or simplified.
A notch 71 is formed in the corner on the indoor side at the upper end of the lower outer wall material 7 (the upper outer wall material is not shown), and a bracket 72 that fixes the outer wall material 7 to the column 11 (see FIG. 2). Is supposed to be attached.
[0024]
The horizontal joint member 80 is formed in a substantially L shape in a plan view, and the corners thereof are curved. As a result, the top portion 80A that protrudes most indoors among the corner portions of the horizontal joint member 80 is the outer wall material. 7 is supported by the upper end surface of the plate 7 so as not to bend downward.
In such a corner portion of the horizontal joint member 80, the bowl-shaped portion 81 and the drainage groove 88 are curved, and water flows along the curved portion.
Further, in order to prevent water from overflowing from the drainage groove 88 to the indoor side, the protrusion 87 constituting the drainage groove 88 is the protrusion 27 of the horizontal joint member 20 described above (see FIGS. 3 to 5). The height of the upward protrusion is increased, and the volume of the drainage groove 88 is expanded.
Furthermore, in order to suppress the intrusion of water into the indoor side due to capillary action or the like, an adhesive material 89 mainly composed of butyl rubber is provided at the upper end portion of the upper support piece 31, and the upper outer wall material (not shown). It comes to adhere to.
[0025]
On the other hand, as shown in FIG. 7 and FIG. 8, the vertical joint portion 9 formed between the outer wall materials 6 A adjacent to the left and right and between the outer wall materials 6 B has drainage communicating with the bowl-shaped portion 21 and the drainage groove 28. A channel 40 is provided so that the water flowing along the bowl-shaped portion 21 flows down through the drainage channel 40.
The drainage channel 40 is formed by a vertical joint member 41 that is press-fitted into the vertical joint portion 9 from the outdoor side, and drains from the vertical joint member 41 to the indoor side portion of the vertical joint portion 9.
[0026]
The vertical joint member 41 is provided with a vertical joint locking portion 42 that is locked to the vertical joint portion 9, and a vertical joint water stop that is provided at an end of the vertical joint locking portion 42 on the outdoor side and closes the vertical joint portion 9. Part 43.
The vertical joint locking portion 42 is formed of a hard material having elasticity, specifically, EPDM, and as shown in FIG. 9, the insertion portion 51 inserted into the vertical joint portion 9 and the insertion portion 51 and a sealing piece 52 protruding toward the side end surfaces of the left and right outer wall members 6A and 6B. These sealing pieces 52 are elastically deformed when the vertical joint member 41 is press-fitted into the vertical joint portion 9, and the front end portions in the protruding direction are pressed against the side end surfaces of the outer wall members 6A and 6B. It is locked to the joint portion 9.
[0027]
The vertical joint water-stopping portion 43 is made of a softer material than the vertical joint locking portion 42, specifically, CSM, and is formed in substantially the same color as the outer wall materials 6 and 7 in order to ensure aesthetics. Embossing is applied to make the material almost the same as the materials 6 and 7.
The vertical joint member 41 of the present embodiment made of these materials is formed by integrally extruding the vertical joint locking portion 42 and the vertical joint water-stopping portion 43 using the CSM and the above-described EPDM. Yes.
[0028]
The vertical joint water-stopping portion 43 includes a water-stopping surface 53 provided so as to cover the end face on the outdoor side of the insertion portion 51, and an end in the width direction of the water-stopping surface 53 (a direction perpendicular to the longitudinal direction of the vertical joint portion 9). And a connecting surface 54 that connects the intermediate portion of each of the insertion portion 51 and the insertion portion 51, and includes an end portion on the outdoor side of the insertion portion 51, and is formed in a rectangular cylinder shape continuous in the longitudinal direction of the vertical joint 9.
A flat surface portion 54 A along the longitudinal end surface of the horizontal joint member 20 is formed on the connecting surface 54. The flat surface portion 54A is in pressure contact with each side end surface of the outer wall materials 6A and 6B, and the longitudinal direction of the outdoor side lip-shaped portion 24 of the horizontal joint member 20 at the intersection of the horizontal joint portion 8 and the vertical joint portion 9. It is brought into close contact with the end face.
[0029]
Further, as shown in FIGS. 7 and 8, the intersecting portion of the horizontal joint portion 8 and the vertical joint portion 9 is made of a foam having flexibility on the indoor side of the horizontal joint member 20 and the vertical joint member 41. A backup material 60 is disposed.
The back-up material 60 includes a transverse water stop 61 disposed on the horizontal joint 8 across the vertical joint 9, and a vertical water stop extending downward from the transverse waterproof 61 along the vertical joint 9. 62 and is formed in a substantially T-shape.
A downward slope toward the outdoor side is attached to the lower part of the outdoor side surface 62A of the vertical water stop 62. The lower end in the inclination direction of the vertical water stop 62 is brought into contact with the vertical joint member 41, and the dropped water that has flowed along the outdoor side surface 62 A of the backup material 60 can be transferred to the vertical joint member 41 and drained. It is like that.
Further, the indoor side surface of the backup material 60 is formed in parallel with the indoor side surfaces of the outer wall materials 6A and 6B, and is installed so as to be flush with the indoor side surfaces of these outer wall materials 6A and 6B. Yes.
[0030]
Such a backup material 60 is constituted by a pair of water blocking blocks 60A and 60B respectively attached to the outer wall material 6B adjacent to the left and right at the lower side at the intersection of the joint portions 8 and 9. These water blocking blocks 60A and 60B are formed in a substantially L-shape that is symmetrical to each other, are respectively attached to the opposing corners of the adjacent outer wall member 6B, and are in close contact with each other with the outer wall member 6B being disposed adjacent to each other. ing.
[0031]
In addition, although not shown in figure, the drainage channel of the same structure is formed also in the vertical joint part 9 formed between the outer wall materials 6 and 7 adjacent on the right and left.
[0032]
In the present embodiment, the waterproof treatment of the horizontal joint portion 8 and the vertical joint portion 9 is performed in the following procedure.
First, the horizontal joint member 20 formed into a long shape and wound up is cut into a length corresponding to the longitudinal dimension of the lateral joint portion 8, that is, the longitudinal dimension of the upper end surface of the outer wall member 6, and Separately, a horizontal joint member 80 formed in an approximately L shape for the corner is prepared.
Further, the longitudinal joint member 41 is also formed into a long length and wound up in advance, and is cut to a length that continuously closes the longitudinal joint portions 9 of the first and second floor portions.
[0033]
And it is both surfaces on the upper end surface of the outer wall materials 6 and 7 of the building unit 3 arranged in the first floor portion of the unit type building 1, that is, the upper end surface of the lower outer wall materials 6B and 7 constituting the horizontal joint portion 8. The horizontal joint members 20 and 80 are tightly fixed by the tape 25.
At this time, a gradient along the longitudinal direction is formed in the bowl-shaped portion 21. That is, when the outer wall member 6 is attached to the framework 4 by a normal operation, it is difficult to attach the outer wall member 6 in a state where the upper end surface is strictly kept on a horizontal plane. Therefore, a gradient along the longitudinal direction can be formed in the bowl-shaped portion 21 by using the inclination generated at the time of attachment.
[0034]
In addition, the upper ends of the side end surfaces of the outer wall materials 6 and 7 of the building unit 3 on the first floor, that is, the upper end portions of the side end surfaces of the outer wall materials 6B and 7 which are the lower side at the intersections of the joint portions 8 and 9 are The water blocking blocks 60A and 60B are fixed tightly. At this time, in order to accurately position the water blocking blocks 60A and 60B, the water blocking blocks 60A and 60B are installed so that the indoor side surfaces of the water blocking blocks 60A and 60B are flush with the indoor side surfaces of the outer wall materials 6B and 7.
[0035]
The horizontal joint members 20, 80 and the water blocking blocks 60A, 60B may be attached in advance at the factory together with the assembly of the building unit 3, or may be performed when the building unit 3 is constructed at the construction site.
[0036]
Next, the building units 3 are sequentially stacked on the foundation 2 at the construction site.
At this time, when the building units 3 on the first floor are disposed adjacent to each other in the horizontal direction, the water blocking blocks 60A and 60B are in close contact with each other between the outer wall materials 6B arranged in parallel on the left and right, and the water blocking blocks 60A and 60B are installed. Even if a slight inclination sometimes occurs, a downward slope toward the outdoor side is formed on the outdoor side surface 62A of the backup material 60 composed of the water blocking blocks 60A and 60B.
Then, when the second-floor building unit 3 is stacked on the first-floor building unit 3, between the outer wall materials 6A and 6B and the outer wall material 7 arranged adjacent to each other in the vertical direction, The inner lip portion 23, the outdoor lip portion 24, and the support pieces 31, 32 are elastically deformed so that their upper ends are pressed against the lower end surfaces of the upper outer wall materials 6A, 7.
Further, the backup material 60 is pressed and elastically deformed by the upper outer wall materials 6 A, 7, and the lateral water blocking portion 61 is in close contact with the upper and lower outer wall materials 6 A, 6 B, 7.
[0037]
Thereafter, the vertical joint member 41 is press-fitted into the vertical joint portion 9 from the outdoor side, and is brought into contact with the lower end portion in the inclination direction of the surface 62A on the outdoor side of the backup material 60. Then, the vertical joint water-stopping portion 43 of the vertical joint member 41 is elastically deformed, and the flat surface portion 54A follows the longitudinal end surface of the outdoor side lip-shaped portion 24 of the horizontal joint members 20 and 80, and is flexible to each other. Because of its properties, it comes into close contact with no gaps.
[0038]
In the joint structure of the outer wall according to the present embodiment configured as described above, most of the rainwater is blocked by the outdoor side lip-shaped portion 24 in the horizontal joint portion 8, and enters the indoor side beyond the outdoor lip-shaped portion 24. The rainwater thus trapped is captured by the bowl-shaped parts 21, 81 and flows along the bowl-shaped parts 21, 81 to the drainage channel 40.
[0039]
In the horizontal joint member 20, the water trapped by the hook-shaped portion 21 passes between the upper and lower outer wall materials 6 A and 6 B according to the longitudinal gradient formed on the bottom surface 26 of the hook-shaped portion when the horizontal joint member 20 is installed. It flows along the longitudinal direction of the ground portion 8. At this time, the water flows through the outdoor side portion in the bowl-shaped portion 21 due to the downward slope of the bowl-shaped bottom surface 26 toward the outdoor side.
[0040]
Specifically, the rainwater that has entered from between the outdoor side lip-shaped portion 24 and the upper outer wall material 6A is first stopped by the upper support piece 31 and flows on the upper surface of the support protrusion 30, and the drain hole 33. To the drainage channel 40 through a space below the support protrusion 30, that is, a space between the lower support piece 32 and the outdoor lip-shaped portion 24.
When the amount of water is larger than the space below the support protrusion 30 and the water overflows from the drain hole 33, the water is in the space above the support protrusion 30, that is, the upper support piece 31 and the outdoor lip. It flows through the space between the parts 24.
The rainwater that has entered the indoor side from between the upper support piece 31 and the upper outer wall member 6A is stopped by the indoor lip-shaped portion 23, and the indoor-side lip-shaped portion 23 and the support piece of the bowl-shaped portion 21 are stopped. It is led to the drainage channel 40 through the space between 31 and 32.
[0041]
Water that has entered the indoor side of the cage-like portion 21 due to capillarity or the like, that is, rainwater that has entered the indoor side from between the indoor-side lip-like portion 23 and the upper outer wall material 6A is stopped by the protruding portion 27. The water is introduced into the drainage channel 40 through the drainage groove 28.
Since the protruding portion 27 is not in contact with the upper outer wall material 6A, water is not flooded into the indoor side by capillarity from between the protruding portion 27 and the outer wall material 6A.
[0042]
Also in the corner joint horizontal joint member 80, as in the case of the horizontal joint member 20, rainwater is introduced into the drainage channel 40 along the bowl-shaped portion 81 and the drainage groove 88.
At this time, since the corner portion of the horizontal joint member 80 is curved, the portion covering the cutout portion 71 of the outer wall member 7 is small, and the top portion 80A of the horizontal joint member 80 is the upper end surface of the lower outer wall member 7. Since the corner portion of the horizontal joint member 80 does not hang downward, it is possible to prevent water from staying at the corner portion of the bowl-shaped portion 81. Further, since the volume of the drainage groove 88 is enlarged, even if the amount of rainwater entering the indoor side from the bowl-shaped portion 81 is larger, the drainage can be reliably drained through the drainage groove 88.
[0043]
Thus, the water that has flowed through the bowl-shaped portions 21 and 81 and the drain grooves 28 and 88 is introduced into the drainage channel 40 at the intersection of the horizontal joint portion 8 and the vertical joint portion 9, and flows down along the drainage channel 40. Drained. Specifically, in the vertical joint portion 9, rainwater flows through a portion on the indoor side of the vertical joint water-stopping portion 43 of the vertical joint member 41.
At the intersecting portion of the joint portions 8 and 9, the water introduced into the portion closer to the indoor side than the vertical joint member 41 from the bowl-shaped portions 21 and 81 and the drain grooves 28 and 88 is stopped by the backup material 60, It is guided to the outdoor side along the slope through the outdoor side surface 62A. And the water which flowed along 62 A of outdoor side surfaces of the vertical water stop part 62 flows along the vertical joint locking part 42 of the vertical joint member 41 from the inclination direction lower end part, and is poured down below. As a result, rainwater does not naturally fall between the backup material 60 and the vertical joint member 41, so that it is possible to prevent the rainwater from entering the indoor side more than the rainwater backup material 60.
[0044]
On the other hand, in the vertical joint portion 9, most of the rainwater is blocked by the vertical joint water-stopping portion 43 of the vertical joint member 41. The water that has entered the vertical joint portion 9 beyond the vertical joint water-stopping portion 43 is introduced into the drainage channel 40 as it is and is allowed to flow downward.
[0045]
According to this embodiment, there are the following effects.
That is, since the outdoor side surface 62A of the backup material 60 is inclined downward toward the outdoor side, rainwater stopped by the backup material 60 at the intersection of the horizontal joint portion 8 and the vertical joint portion 9. Since it flows down toward the outdoor side along the downward slope of the surface 62A on the outdoor side, rainwater can be prevented from moving toward the indoor side, so that excellent waterproof properties can be secured.
In addition, since the backup material 60 is previously provided with a downward slope toward the indoor side, a downward slope toward the indoor side is formed on the outdoor side surface 62A due to the inclination at the time of installation of the backup material 60. Can be reliably prevented. Accordingly, it is not necessary to strictly manage the inclination at the time of installation, so that the backup material 60 can be easily installed.
[0046]
In addition, since the lower end in the inclination direction of the backup material 60 is brought into contact with the vertical joint member 41, rainwater flows down along the outdoor side surface 62 A of the backup material 60 and then travels through the vertical joint member 41. It begins to flow down. Therefore, the water stopped by the backup material 60 can be prevented from entering the indoor side below the backup material 60.
[0047]
And since the backup material 60 has the horizontal water stop part 61 and the vertical water stop part 62 and is formed in the substantially T shape, it covers reliably the part which the horizontal joint members 20 and 80 interrupted from the indoor side. Therefore, an excellent waterproof effect can be obtained.
[0048]
Further, since the backup material 60 is composed of a pair of water blocking blocks 60A and 60B attached to the outer wall materials 6B and 7 adjacent to the left and right, the water blocking blocks 60A and 60B are preliminarily attached to the outer wall materials 6B and 7 respectively. If it attaches to, the backup material 60 can be easily installed in the crossing part of the horizontal joint part 8 and the vertical joint part 9 only by arranging the outer wall materials 6B and 7 side by side.
Further, since the water blocking blocks 60A and 60B are in close contact with each other, it is possible to reliably prevent rainwater from entering between the blocks 60A and 60B.
[0049]
And since the indoor side surface of the backup material 60 is parallel to the indoor side surface of the outer wall materials 6 and 7, the water blocking blocks 60A and 60B are flush with the indoor side surface of the outer wall materials 6 and 7. Therefore, the backup material 60 can be installed more easily.
[0050]
Further, since the backup material 60 is made of a foam, it is possible to ensure flexibility. Therefore, the backup material 60 is elastically deformed to follow the outer wall materials 6 and 7, so that the backup material 60 and the outer wall material are used. Excellent water tightness can be secured between 6 and 7.
[0051]
Furthermore, in the horizontal joint members 20 and 80, the space between the lip-shaped parts 23 and 24 erected on the horizontal joint base portion 22 is the hook-shaped parts 21 and 81. In addition, the rainwater that has entered the indoor side beyond the outdoor lip-shaped part 24 can be drained through the bowl-shaped parts 21 and 81, so that the water is more indoors than the horizontal joint members 20 and 80. Can be surely prevented.
Further, since the lip portions 23 and 24 are pressed against the lower end surfaces of the upper outer wall members 6A and 7, high waterproofness can be secured between the horizontal joint members 20 and 80 and the upper outer wall members 6A and 7.
[0052]
Further, in installing the horizontal joint members 20 and 80, the horizontal joint base 22 is closely fixed to the upper end surfaces of the lower outer wall materials 6B and 7, and the upper outer wall materials 6B and 7 are arranged on the upper side. Since it is only necessary to arrange the outer wall materials 6A and 7 and sandwich the horizontal joint members 20 and 80, it can be easily installed.
Since the horizontal joint base 22 is formed in a plate shape, the horizontal joint base 22 can be fixed in a large area to the upper end surfaces of the lower outer wall materials 6B and 7, and the horizontal joint base 22 and the lower outer wall materials 6B and 7 can be fixed. Excellent waterproof properties can be obtained.
[0053]
And since the downward slope which goes to the outdoor side is formed in the bowl-shaped part bottom face 26, water will flow along the part of the outdoor side of each space of the bowl-shaped parts 21 and 81, and indoor side Since it can prevent heading, the waterproofness of the horizontal joint part 8 can be improved further.
[0054]
Further, since the protruding portions 27 and 87 are erected at the indoor side end portion of the base portion 22 for the horizontal joint, the water that has entered the indoor side beyond the indoor lip-shaped portion 23 due to capillary action is projected into the protruding portion 27. , 87 and water can be reliably drained along the drain grooves 28, 88, so that an excellent waterproof effect can be expected.
[0055]
The outdoor lip portion 24 is provided with a support protrusion 30 having an upper support piece 31 and a lower support piece 32 so that the lower joint piece 22 causes the horizontal joint base 22 to be located on the lower side. Since it is pressed by the upper end surface of the outer wall material 6B, the adhesiveness between the horizontal joint base 22 and the lower outer wall material 6B can be enhanced.
[0056]
Further, since the lower support piece 32 is connected to the horizontal joint base 22, the horizontal joint base 22 can be reliably pressed by the connecting portion, and when the lower support piece 32 is installed in the horizontal joint 8, The outer lip-shaped portion 24 can be reliably held in a posture bent toward the indoor side.
[0057]
Further, since the drainage hole 33 is formed in the support protrusion 30, rainwater can be guided from the drainage hole 33 to a space below the support protrusion 30. Since the amount of water entering the indoor side beyond the upper support piece 31 can be reduced, the waterproof effect can be enhanced.
Moreover, since rainwater can be circulated also in the space below the support protrusion 30, the space of the bowl-shaped portions 21 and 81 can be used effectively. Accordingly, since the amount of water that can be captured by the bowl-shaped portions 21 and 81 can be increased, the overflow of water from the bowl-shaped portions 21 and 81 can be suppressed even when the amount of water is large.
In particular, since the horizontal joint member 20 can increase the amount of water that can be circulated to the bowl-shaped portion 21 in the middle portion in the longitudinal direction with poor drainage, excellent waterproof properties can be obtained.
[0058]
And since the indoor side part of the corner | angular part of the horizontal joint member 80 for the corner 1B is curved, the part which covers the notch part 71 of the upper end of the outer wall material 7 among the corner | angular parts of the horizontal joint member 80 In addition, since the top portion 80A can be supported by the outer wall material 7, the downward bending of the corner portion of the horizontal joint member 80 can be prevented. Therefore, since water can be prevented from staying at the corners of the bowl-shaped portion 81, excellent waterproof properties can be secured.
In addition, even if rainwater flows toward the corner portion of the hook-shaped portion 81, the rainwater can be smoothly circulated to the end portion of the hook-shaped portion 81 along the curvature of the corner portion. Since retention and overflow of rainwater at the corners of 81 can be prevented, waterproofness can be improved.
[0059]
Furthermore, since the upper support piece 31 of the horizontal joint member 80 for the corner 1B is provided with an adhesive material 89 that is in close contact with the upper outer wall material 7, the upper support piece 31 is attached via the adhesive material 89. The upper outer wall material 7 can be securely adhered. Therefore, since water can be prevented from entering the indoor side from between the upper support piece 31 and the upper outer wall member 7, the waterproof effect can be enhanced.
Moreover, since the adhesive material 89 has butyl rubber as a main component, excellent weather resistance can be secured.
[0060]
And since the drainage channel 40 is provided in the vertical joint part 9, the water which flowed along the bowl-shaped parts 21 and 81 and the drainage grooves 28 and 88 can be surely poured down through the drainage channel 40. Good waterproofness can be obtained.
Moreover, the drainage channel 40 of this embodiment can be easily formed only by press-fitting the vertical joint member 41.
[0061]
Furthermore, since the vertical joint member 41 has the vertical joint water-stopping portion 43 that closes the vertical joint portion 9, most of the rainwater entering the vertical joint portion 9 can be blocked by the vertical joint water-stopping portion 43. Since the water that has entered the indoor side beyond the vertical joint water-stopping portion 43 can flow downward through the drainage channel 40, good waterproofness can be secured to the vertical joint portion 9.
[0062]
Further, since the vertical joint water-stopping portion 43 is made of CSM which is a softer material than the vertical joint locking portion 42, the vertical joint water-stopping portion 43 easily deforms and follows the end surfaces of the horizontal joint members 20, 80. The water stop portion 43 can be brought into close contact with the end surfaces of the horizontal joint members 20, 80, specifically, the end surface of the outdoor side lip-shaped portion 24. Therefore, since water can be reliably prevented from the connecting portion between the horizontal joint member 20 and the vertical joint member 41, excellent waterproof properties can be ensured.
Furthermore, since the outdoor side lip-shaped portion 24 of the horizontal joint members 20, 80 is also formed of soft CSM, it is easy to press the vertical joint water-stopping portion 43 against the end face of the outdoor-side lip-shaped portion 24. Since it deform | transforms and follows the flat part 54A of the vertical joint water stop part 43, the outstanding adhesiveness can be ensured and waterproofness can be improved further.
[0063]
And since the vertical joint water stop part 43 is formed in the cylinder shape, since it can deform | transform large in the direction orthogonal to the longitudinal direction, the more outstanding softness | flexibility is obtained and the horizontal joint members 20 and 80 of It is possible to follow the end face more reliably.
[0064]
Further, since the vertical joint water-stopping portion 43 has the flat surface portion 54A along the end surfaces of the horizontal joint members 20 and 80, even if the outdoor side lip-shaped portion 24 is bent, the flat surface portion 54A is replaced with the outdoor-side lip-shaped portion 24. Since surface contact can be ensured with the end surface in the longitudinal direction, the outdoor lip-shaped portion 24 and the vertical joint water-stopping portion 43 can be connected without a gap, so that excellent waterproof properties can be secured.
[0065]
In addition, this invention is not limited to the said embodiment, Other modifications etc. which can achieve the objective of this invention are included, The deformation | transformation etc. which are shown below are also contained in this invention.
That is, in the above-described embodiment, the downward slope toward the outdoor side is given to the lower part of the outdoor side surface 62A of the backup material 60, but the downward slope may be given to the entire surface on the outdoor side.
Further, the backup material is not limited to a pair of water blocking blocks, and may be constituted by three or more water blocking blocks, or may be integrally formed.
[0066]
And in the said embodiment, although the vertical joint water stop part 43 of the vertical joint member 41 was formed in the cylinder shape, you may form solidly, According to this, the followability to the end surface of a horizontal joint member falls a little. However, since the rigidity is increased, the press-fitting work of the vertical joint member can be facilitated.
Further, the corner portion of the horizontal joint member 80 for the corner portion in the embodiment has a generally curved shape, but only the indoor side portion is curved and the outdoor side portion is bent. It is good.
[0067]
Moreover, although the outer wall materials 6 and 7 of the said embodiment were made from the lightweight cellular concrete formed comparatively thick, you may form an outer wall material with a siding material etc. thinner than this. However, since the present invention has a structure in which water flows using the space between the outer wall material and the outer wall material, the outer wall material is preferably thicker.
Furthermore, in the embodiment described above, the joint structure of the outer wall of the unit type building has been described, but the present invention is not limited to the outer wall of the unit type building, and if it is an outer wall in which a plurality of outer wall materials are arranged side by side, It can also be applied to the outer walls of buildings built by methods other than the unit method. For example, the present invention may be applied to an outer wall or the like in which outer wall materials are mounted side by side on a steel frame frame or the like.
[0068]
【The invention's effect】
As described above, according to the present invention, the outdoor side surface of the backup material is provided with a downward slope toward the outdoor side, so that the backup material is used at the intersection of the horizontal joint portion and the vertical joint portion. Rainwater that has been stopped flows down to the outdoor side along the downward slope of the surface on the outdoor side, so that excellent waterproof properties can be secured.
Further, since the backup material is previously provided with a downward slope toward the indoor side, it is possible to prevent the downward slope toward the indoor side from being formed on the outdoor side surface due to the inclination of the backup material during installation. Therefore, unlike the conventional prismatic backup material, it is not necessary to strictly manage the inclination at the time of installation, so that the backup material can be easily installed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing the building unit of the embodiment in a partially broken view.
FIG. 3 is a perspective view showing a horizontal joint member of the embodiment.
FIG. 4 is a view showing a horizontal joint member of the embodiment.
FIG. 5 is a sectional view showing an installation state of the horizontal joint member of the embodiment.
FIG. 6 is a perspective view showing a horizontal joint member for a corner portion in the embodiment.
FIG. 7 is a perspective view showing a crossing portion of a horizontal joint portion and a vertical joint portion of the embodiment.
FIG. 8 is an exploded perspective view showing a crossing portion of the horizontal joint portion and the vertical joint portion of the embodiment.
FIG. 9 is a view showing a vertical joint member of the embodiment.
[Explanation of symbols]
1 Unit type building 1B Corner section 6, 6A, 6B Outer wall material 7 Outer wall material 8 Horizontal joint part 9 Vertical joint part 20, 80 Horizontal joint member 21, 81 Ridge part 23 Indoor side lip part 24 Outdoor side lip part 30 Support projection 31 Upper support piece 32 Lower support piece 33 Drain hole 40 Drainage channel 41 Vertical joint member 42 Vertical joint locking part 43 Vertical joint water stop part 54A Flat part 60 Backup material 60A, 60B Water stop block 61 Horizontal stop Water part 62 Vertical water stop part 89 Adhesive material

Claims

A joint structure of the outer wall in which a plurality of outer wall materials are arranged side by side vertically,
The horizontal joint portion formed between the upper and lower adjacent outer wall materials is provided with a horizontal joint member having a hook-shaped portion for flowing water along the horizontal joint portion,
The vertical joint formed between the outer wall materials adjacent to the left and right is provided with a drainage channel for dropping water from the bowl-shaped portion downward,
At the intersection of the horizontal joint and the vertical joint, a block-shaped backup material is disposed on the indoor side of the horizontal joint member,
On the outdoor side surface of this backup material, a downward slope toward the outdoor side is attached ,
The backup material has a pair of symmetrical L-shapes attached to respective corner portions formed by upper end surface portions of the outer wall materials adjacent to the left and right sides and opposing surface portions of the outer wall materials facing each other. Consists of water blocking blocks
These water blocking blocks are arranged in close contact with each other, so that the horizontal water blocking portions are arranged in the horizontal joint portion and in close contact with the outer wall material arranged in the vertical direction across the vertical joint portion. And a joint structure of the outer wall, characterized in that the joint structure is arranged in a substantially T shape having a longitudinal water stop portion extending downward from the lateral water stop portion along the vertical joint portion.

In the joint structure of the outer wall according to claim 1,
In the vertical joint, a vertical joint member constituting the drainage channel is press-fitted from the outdoor side,
The joint structure of the outer wall, wherein the vertical joint member is in contact with the lower end portion in the inclination direction of the outdoor side surface of the backup material.

The joint structure of the outer wall according to claim 1 or 2, wherein the indoor side surface of the backup material is parallel to the indoor side surface of the outer wall material.

The joint structure of the outer wall according to any one of claims 1 to 3, wherein the backup material is made of a foam.