JP4795009B2 - Waterproof structure of exterior wall joint - Google Patents

Waterproof structure of exterior wall joint Download PDF

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JP4795009B2
JP4795009B2 JP2005347609A JP2005347609A JP4795009B2 JP 4795009 B2 JP4795009 B2 JP 4795009B2 JP 2005347609 A JP2005347609 A JP 2005347609A JP 2005347609 A JP2005347609 A JP 2005347609A JP 4795009 B2 JP4795009 B2 JP 4795009B2
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保雄 福地
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アサヒゴム株式会社
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本発明は、躯体間及び外壁材間の目地を防水する外壁目地用防水部材及び外壁目地の防水構造に関する。   The present invention relates to a waterproof member for an outer wall joint that waterproofs joints between housings and between outer wall materials, and a waterproof structure of the outer wall joint.

近年、建築物の外壁として、外壁パネル等の外壁材が広く用いられている。通常、外壁材は、その端部が、間隔を空けて設けられた柱等の躯体に固定されて取り付けられている。ここで、隣接する躯体間及び外壁材間には目地が形成される。この目地は、屋内と屋外とを連通しており、そのままでは目地から屋内に雨等が侵入してしまうため、目地には雨等の侵入を防ぐことを目的とした防水処理が施されている。
左右に隣接する躯体間及び外壁材間の目地を防水する防水処理としては、例えば、外壁材間の目地に、ゴムや可撓性樹脂等の材質からなるガスケットを挿入する方法が知られている（特許文献１参照）。このガスケットは、側面が両方の外壁材に密着することにより、防水性を確保する。
また、特許文献２では、各外壁材に長尺の樹脂シートの幅方向の一端を固定しておき、外壁材を隣接配置した後、隣接する樹脂シート同士を目地に沿って重ね合わせ、その重ね合わせ部分を水切りテープで覆い、覆った部分を目地の中に押し込む方法が提案されている。
また、特許文献３では、柱と外壁材との間に長尺のゴム製防水シートの幅方向の一端を挟みつつ、外壁材を隣接配置した後、隣接する防水シート同士を接着し、接着部分を目地の中に押し込む方法が提案されている。
特開昭６３−４４０４７号公報 特開平９−３０２７８５号公報 特開平１０−２３５７７５号公報 In recent years, outer wall materials such as outer wall panels have been widely used as outer walls of buildings. Usually, the outer wall material is fixedly attached to a housing such as a pillar provided at an interval at an end thereof. Here, joints are formed between adjacent housings and outer wall materials. This joint communicates indoors and outdoors, and rain or the like enters the interior from the joints as it is, so the joints are waterproofed to prevent rain and the like from entering. .
As a waterproofing treatment for waterproofing joints between right and left adjacent frames and outer wall materials, for example, a method of inserting a gasket made of a material such as rubber or flexible resin into the joints between outer wall materials is known. (See Patent Document 1). This gasket ensures waterproofness by having the side surfaces in close contact with both outer wall materials.
Moreover, in patent document 2, after fixing the end of the width direction of a long resin sheet to each outer wall material, after arrange | positioning an outer wall material adjacently, it overlaps along the joint and adjoins the resin sheet. A method has been proposed in which the mating portion is covered with a draining tape and the covered portion is pushed into the joint.
Further, in Patent Document 3, an outer wall material is disposed adjacent to each other while sandwiching one end in the width direction of a long rubber waterproof sheet between a pillar and an outer wall material, and then the adjacent waterproof sheets are bonded to each other, and a bonded portion There has been proposed a method of pushing the inside of the joint.
Japanese Unexamined Patent Publication No. 63-44047 JP-A-9-302785 JP-A-10-235775

しかしながら、押出成形体であるガスケットは、経時的に押出時の長さ方向に収縮するため、特許文献１に記載の防水処理では、外壁材とガスケットとの間に次第に隙間を生じて防水性が不充分になることがあった。その上、外壁材の小口に段差がある場合には、外壁材とガスケットとの間の一部に隙間が形成されてしまうため、その隙間をコーキング材等により埋めなければならず、防水処理作業に手間を要した。しかも、コーキング材は、振動や環境の変化により伸縮するため、亀裂が生じ、防水性を確保できないことがあった。
また、外壁材の縦方向の長さは３ｍ程度と長いため、特許文献２，３に記載の方法では、樹脂シート同士又は防水シート同士を貼着する作業の作業性が低かった。さらに、目地の間隔は狭いため、樹脂シート同士又は防水シート同士を貼着する作業は屋外側で行い、貼着した後に、貼着部分を目地の中に押し込むことになるが、その押し込み作業の作業性も低かった。
本発明は、前記事情を鑑みてなされたものであり、防水性に優れる上に、外壁材の小口に段差があっても防水処理作業に手間を要さず、防水処理作業の作業性にも優れた外壁目地用防水部材及び外壁目地の防水構造を提供することを目的とする。 However, since the gasket, which is an extrusion molded body, shrinks in the length direction during extrusion over time, the waterproof treatment described in Patent Document 1 gradually creates a gap between the outer wall material and the gasket, and the waterproof property is increased. Sometimes it was inadequate. In addition, if there is a step in the edge of the outer wall material, a gap will be formed in part between the outer wall material and the gasket, so the gap must be filled with caulking material, etc. It took time and effort. In addition, since the caulking material expands and contracts due to vibrations and environmental changes, cracks may occur and waterproofness may not be ensured.
Moreover, since the length of the outer wall material in the vertical direction is as long as about 3 m, in the methods described in Patent Documents 2 and 3, the workability of attaching the resin sheets or the waterproof sheets is low. In addition, since the joint spacing is narrow, the work of sticking the resin sheets or waterproof sheets together is done outdoors, and after sticking, the sticking part will be pushed into the joint. Workability was also low.
The present invention has been made in view of the above circumstances, and is excellent in waterproofness, and even if there is a step in the outer wall material, there is no need for troublesome waterproofing work. An object of the present invention is to provide an excellent waterproofing member for outer wall joints and a waterproof structure for outer wall joints.

本発明の外壁目地の防水構造は、第１の躯体及び該第１の躯体に取り付けられた第１の外壁材と、第２の躯体及び該第２の躯体に取り付けられた第２の外壁材とで形成された目地を、第１の防水部材および第２の防水部材により防水する外壁目地の防水構造であって、
第１の防水部材および第２の防水部材が、長尺矩形状の可撓性シートからなり、長さ方向に沿って谷折りに折り返された谷折り領域を有する防水シートと、該防水シートの幅方向の一方の端部上に長さ方向に沿って設けられた防水層とを具備する外壁目地用防水部材であり、
第１の防水部材の防水層が、第１の外壁材の第１の躯体側表面に取り付けられ、第２の防水部材の防水層が、第２の外壁材の第２の躯体側表面に取り付けられ、
第１の防水部材および第２の防水部材に各々具備された防水シートの谷折り領域の長さ方向が、目地に沿って配置され、かつ、各谷折り領域が重なり合っていることを特徴とする。
本発明の外壁目地の防水構造においては、第１の防水部材に具備された防水シートの幅方向の他方の端部が、第２の躯体に接し、第２の防水部材に具備された防水シートの幅方向の他方の端部が、第１の外壁材に接していることが好ましい。
本発明の外壁目地の防水構造においては、第１の防水部材の谷折り領域及び第２の防水部材の谷折り領域より屋外側の目地に、コーキング材又はガスケットが充填されていることが好ましい。
本発明の外壁目地の防水構造においては、防水シートの幅方向の他方の端部が、外側に向けて折曲されていることが好ましい。 The waterproof structure of the outer wall joint of the present invention includes a first casing, a first outer wall member attached to the first casing, a second casing, and a second outer wall member attached to the second casing. The waterproof structure of the outer wall joint that waterproofs the joint formed by the first waterproof member and the second waterproof member,
The first waterproof member and the second waterproof member are made of a long rectangular flexible sheet, and have a valley fold region folded back into a valley fold along the length direction, and the waterproof sheet A waterproof member for joints on the outer wall comprising a waterproof layer provided along the length direction on one end in the width direction ;
The waterproof layer of the first waterproof member is attached to the first casing side surface of the first outer wall member, and the waterproof layer of the second waterproof member is attached to the second casing side surface of the second outer wall member. And
The length direction of the valley fold region of the waterproof sheet provided in each of the first waterproof member and the second waterproof member is disposed along the joint, and the valley fold regions overlap each other. .
In the waterproof structure of the outer wall joint according to the present invention, the other end in the width direction of the waterproof sheet provided in the first waterproof member is in contact with the second casing, and the waterproof sheet provided in the second waterproof member. It is preferable that the other end in the width direction is in contact with the first outer wall material.
In the waterproof structure of the outer wall joint of the present invention, it is preferable that the caulking material or the gasket is filled in the joint on the outdoor side from the valley fold region of the first waterproof member and the valley fold region of the second waterproof member.
In the waterproof structure of the outer wall joint of the present invention, it is preferable that the other end portion in the width direction of the waterproof sheet is bent outward.

本発明の外壁目地用防水部材及び外壁目地の防水構造は、防水性に優れる上に、外壁材の小口に段差があっても防水処理作業に手間を要さず、防水処理作業の作業性にも優れている。   The waterproof member for the outer wall joint and the waterproof structure for the outer wall joint of the present invention are excellent in waterproof property, and even if there is a step in the outer wall material, there is no need for trouble in the waterproof treatment work, and the waterproof treatment work efficiency is improved. Is also excellent.

本発明の外壁目地用防水部材（以下、防水部材と略す。）の一実施形態例について説明する。
図１及び図２に、本実施形態例の防水部材を示す。本実施形態例の防水部材１０は、長尺矩形状の可撓性シートからなる防水シート１１と、防水シート１１の幅方向の一方の端部上に長さ方向に沿って設けられた防水層１２とを有するものである。 An embodiment of the waterproof member for outer wall joints (hereinafter abbreviated as a waterproof member) according to the present invention will be described.
1 and 2 show a waterproof member of this embodiment. The waterproof member 10 according to this embodiment includes a waterproof sheet 11 made of a long rectangular flexible sheet, and a waterproof layer provided along the length direction on one end of the waterproof sheet 11 in the width direction. 12.

防水部材１０を構成する防水シート１１は、長さ方向に沿って谷折りに折り返された谷折り領域Ｐと、防水層１２が接し、外壁材と躯体との間に挟持される取付領域Ｑとを有している。
本実施形態例における防水シート１１は、幅方向の他方の端部が外側に向けて折曲されている。本実施形態例では、この外側に向けて折曲された部分のことを外折り部１４という。
また、防水シート１１は、谷折り領域Ｐと取付領域Ｑとの境界線Ｌで折曲され、防水層１２表面と谷折り領域Ｐの折り目１３先端とが互いに反対側を向くようになっている。
さらに、本実施形態における防水シート１１においては、谷折り領域Ｐにおける取付領域Ｑ側の端部にも、長さ方向に沿って折り目１５，１５が形成されている。
防水シート１１の谷折り領域Ｐにおいては、境界線Ｌから折り目１３までの距離と、外折り部１４の端部から折り目１３までの距離とが略同等である。 The waterproof sheet 11 constituting the waterproof member 10 includes a valley fold region P that is folded back into a valley fold along the length direction, and a mounting region Q that is in contact with the waterproof layer 12 and is sandwiched between the outer wall material and the housing. have.
The waterproof sheet 11 in the present embodiment is bent toward the outside at the other end in the width direction. In the present embodiment, the portion bent toward the outside is referred to as an outer folded portion 14.
Further, the waterproof sheet 11 is bent at a boundary line L between the valley fold region P and the attachment region Q so that the surface of the waterproof layer 12 and the tip of the fold 13 of the valley fold region P face each other. .
Furthermore, in the waterproof sheet 11 in the present embodiment, folds 15 and 15 are also formed along the length direction at the end of the valley fold region P on the attachment region Q side.
In the valley fold region P of the waterproof sheet 11, the distance from the boundary line L to the crease 13 is substantially equal to the distance from the end of the outer fold 14 to the crease 13.

防水シート１１をなす可撓性シートとしては、例えば、架橋ポリエチレン、ポリプロピレン、無可塑ポリ塩化ビニル、ポリエチレンテレフタレートなどの樹脂からなるシート、アルミニウム薄膜などが挙げられる。これらの中でも、可撓性と強度とを併せ持ち、かつ、耐熱性を有することから、ポリプロピレンが好ましく、特に無延伸ポリプロピレン（ＣＰＰ）が好ましい。また、無延伸ポリプロピレンは半透明であり、折り目１３が白色線になるため、後述するように一対の防水部材１０を施工する際に、目視によって折り目１３同士を重ねることができる。   Examples of the flexible sheet constituting the waterproof sheet 11 include a sheet made of a resin such as crosslinked polyethylene, polypropylene, unplasticized polyvinyl chloride, and polyethylene terephthalate, and an aluminum thin film. Among these, polypropylene is preferable because it has both flexibility and strength and heat resistance, and unstretched polypropylene (CPP) is particularly preferable. Moreover, since unstretched polypropylene is translucent and the crease | fold 13 becomes a white line, when constructing a pair of waterproof member 10 so that it may mention later, the crease | folds 13 can be piled up visually.

防水シート１１の幅は、目地の防水性を確実に確保できることから、目地間幅の２〜５倍であることが好ましい。ここで、防水シート１１の幅とは、折曲されてない状態での、防水シート１１の長さ方向の直交方向における両端間の長さのことである。
防水シート１１の長さは、防水処理作業の作業性及び輸送性の点から、０．１〜３．０ｍであることが好ましい。
防水シート１１の厚みは、防水性及びハンドリング性の点から、０．２〜０．６ｍｍであることが好ましい。 The width of the waterproof sheet 11 is preferably 2 to 5 times the width between joints because the waterproofness of the joints can be reliably ensured. Here, the width | variety of the waterproof sheet 11 is the length between the both ends in the orthogonal direction of the length direction of the waterproof sheet 11 in the state which is not bent.
The length of the waterproof sheet 11 is preferably 0.1 to 3.0 m from the viewpoint of workability and transportability of the waterproof treatment work.
The thickness of the waterproof sheet 11 is preferably 0.2 to 0.6 mm from the viewpoint of waterproofness and handling properties.

防水層１２を形成する防水剤としては粘着性を有するものであり、例えば、ブチルゴム、ウレタンゴム、スチレン−イソプレン−スチレンブロック共重合体（ＳＩＳ）、スチレン−ブタジエン−スチレンブロック共重合体（ＳＢＳ）などが挙げられる。これらの中でも、粘着性に優れる上に、耐候性、耐熱性、耐火性なども良好で、かつ、安価であることから、ブチルゴムが好ましい。
また、防水層１２が取り付けられる外壁材の裏面が、防水処理した平滑面である場合には、防水層１２として、独立発泡体からなる防水スポンジを用いることもできる。 The waterproofing agent for forming the waterproof layer 12 has adhesiveness, for example, butyl rubber, urethane rubber, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS). Etc. Among these, butyl rubber is preferable because it is excellent in tackiness, weather resistance, heat resistance, fire resistance, and the like, and is inexpensive.
Moreover, when the back surface of the outer wall material to which the waterproof layer 12 is attached is a waterproof smooth surface, a waterproof sponge made of an independent foam can be used as the waterproof layer 12.

防水層１２の表面の少なくとも一部には、易破砕性の塗膜が形成されていることが好ましい。ここで「易破砕性」とは、押圧力により、容易に破砕する性質のことである。このような易破砕性の塗膜が防水層１２の表面に形成されていれば、防水層１２を外壁材に接触させても直ちに貼着されないため、外壁材に貼着する際に貼着位置を調整できる。
易破砕性の塗膜を構成する材料としては、膠などのゼラチン、セルロース又はその誘導体、澱粉又はその誘導体、水ガラスなどが挙げられる。 It is preferable that an easily fragile coating film is formed on at least a part of the surface of the waterproof layer 12. Here, “easy to break” means a property of being easily broken by a pressing force. If such an easily fragile coating film is formed on the surface of the waterproof layer 12, even if the waterproof layer 12 is brought into contact with the outer wall material, it is not immediately attached. Can be adjusted.
Examples of the material constituting the easily fragile coating film include gelatin such as glue, cellulose or a derivative thereof, starch or a derivative thereof, and water glass.

防水層１２は、貼着性の点から、幅が０．３〜１．５ｃｍであることが好ましく、厚さが０．５〜３．０ｍｍであることが好ましい。   The waterproof layer 12 preferably has a width of 0.3 to 1.5 cm and a thickness of 0.5 to 3.0 mm from the viewpoint of sticking property.

防水部材１０の製造方法としては、例えば、長尺平面状の可撓性シートを長さ方向に沿って折り返し及び折り曲げて、谷折り領域Ｐを有する防水シート１１を形成した後、防水シート１１の幅方向の一方の端部上に、防水シート１１の長さ方向に沿って防水層１２を形成する方法、長尺平面状の可撓性シートの幅方向の一方の端部上に、可撓性シートの長さ方向に沿って防水層１２を形成した後、可撓性シートを長さ方向に沿って折り返し及び折り曲げて、谷折り領域Ｐを有する防水シート１１を形成する方法などが挙げられる。   As a method for manufacturing the waterproof member 10, for example, after forming a waterproof sheet 11 having a valley fold region P by folding and bending a long planar flexible sheet along the length direction, A method of forming the waterproof layer 12 along the length direction of the waterproof sheet 11 on one end portion in the width direction, and a flexibility on one end portion in the width direction of the long planar flexible sheet. A method of forming the waterproof sheet 11 having the valley fold region P by forming the waterproof layer 12 along the length direction of the adhesive sheet and then folding and bending the flexible sheet along the length direction. .

ここで、可撓性シートを折り返したり、折り曲げたりするためには、例えば、平面状の可撓性シートの長さ方向を、先端が丸められた刃先を有する鋼鉄製の回転刃と、この刃先が没入する断面略Ｖ字状の環状溝が外周面に形成された回転ローラとを具備する折り曲げ装置を用いればよい。この折り曲げ装置では、回転刃と環状溝との隙間に防水シート１１を長さ方向に沿って挿入し、通過させることにより折り曲げることができる。その際、回転刃と環状溝との間の隙間の距離は、可撓性シートの厚みの１０〜５０％程度とすることが好ましい。
防水層１２の形成方法としては、例えば、押出機の口金から、防水シート１１の幅方向の一方の端部上に、防水シート１１の長さ方向に沿って粘着剤を連続的に押し出す方法などが挙げられる。 Here, in order to fold or bend the flexible sheet, for example, the length direction of the planar flexible sheet is changed to a steel rotary blade having a cutting edge with a rounded tip, and the cutting edge. A bending device may be used that includes a rotary roller in which an annular groove having a substantially V-shaped cross-section into which the groove is immersed is formed on the outer peripheral surface. In this bending apparatus, the waterproof sheet 11 can be inserted in the gap between the rotary blade and the annular groove along the length direction and bent by passing it. In that case, it is preferable that the distance of the clearance gap between a rotary blade and an annular groove shall be about 10 to 50% of the thickness of a flexible sheet.
As a method for forming the waterproof layer 12, for example, a method of continuously extruding an adhesive along the length direction of the waterproof sheet 11 on one end in the width direction of the waterproof sheet 11 from a die of an extruder. Is mentioned.

上述した防水部材１０を構成する防水シート１１は一部が谷折りされているため、折り畳むことができ、間隔の狭い目地の中に容易に押し込むことができる。また、防水シート１１は形状復元性を有するため、防水シート１１の谷折り領域Ｐを折り畳んでも、折り畳むための力の付与を止めると、折り畳む前の形状に復元する。そのため、防水部材１０を防水層１２によって外壁材の裏面（躯体側の表面）に貼着して取り付け、谷折り領域Ｐを折り畳んで目地の中に配置した際には、谷折り領域Ｐが広がって目地を塞ぐことができる。その結果、屋内と屋外とが連通しなくなるから、防水性を確保することができる。
この防水部材１０は、上記のように、防水シート１１の形状復元性を利用して防水性を確保するため、目地に沿ってシート同士を貼着する作業を省略でき、防水処理作業の作業性に優れる。しかも防水部材１０は、防水層１２により外壁材の裏面に貼着して取り付けるから、外壁材の小口に段差があっても隙間が形成されず、隙間を埋める作業を省略でき、防水処理作業に手間を要さない。 Since the waterproof sheet 11 constituting the waterproof member 10 described above is partially folded, it can be folded and easily pushed into joints with a small interval. Moreover, since the waterproof sheet 11 has shape restoring property, even if the valley fold region P of the waterproof sheet 11 is folded, when the application of force for folding is stopped, the waterproof sheet 11 is restored to the shape before folding. Therefore, when the waterproof member 10 is attached by being attached to the back surface (surface on the housing side) of the outer wall material by the waterproof layer 12, and the valley fold region P is folded and arranged in the joint, the valley fold region P is expanded. Can close the joints. As a result, indoors and outdoors are not in communication, so that waterproofness can be ensured.
As described above, the waterproof member 10 uses the shape restoring property of the waterproof sheet 11 to secure the waterproof property. Therefore, the work of sticking the sheets along the joint can be omitted, and the workability of the waterproof processing work can be omitted. Excellent. Moreover, since the waterproof member 10 is attached by being attached to the back surface of the outer wall material by the waterproof layer 12, no gap is formed even if there is a step in the outer wall material, so that the work of filling the gap can be omitted, and the waterproof processing work can be omitted. There is no need for trouble.

なお、本発明の防水部材は上述した実施形態例に限定されない。例えば、防水シート１１が谷折り領域Ｐと取付領域Ｑとの境界線Ｌで折曲され、谷折り領域Ｐにおける取付領域Ｑ側の端部が長さ方向に沿って折曲されていたが、このように折曲されていなくてもよい。ただし、防水シート１１が谷折り領域Ｐと取付領域Ｑとの境界線Ｌで折曲されていれば、形状復元性がより高くなり、目地をより塞ぎやすくなるため、防水性がより高くなる。また、谷折り領域Ｐにおける取付領域Ｑ側の端部が折り目１５，１５にて長さ方向に沿って折曲されていれば、屈曲性が高くなるため、防水部材１０を取り付けた外壁材を輸送する際に、防水部材１０を外壁材の小口に容易に沿わせることができる上に、防水部材１０を施工する際に、谷折り領域Ｐが外壁材の表面側に配置されるように容易に折り曲げることができる。なお、折り目１５は１つであっても構わない。
また、上記防水部材１０では、防水層１２表面と谷折り領域Ｐの折り目１３先端とが互いに反対側を向くように、防水層１２が防水シート１１の端部の片面上に形成されていたが、防水層１２は防水シート１１の端部の両面に形成されていても構わない。 In addition, the waterproof member of this invention is not limited to the example of embodiment mentioned above. For example, the waterproof sheet 11 is bent at the boundary line L between the valley fold region P and the attachment region Q, and the end of the valley fold region P on the attachment region Q side is bent along the length direction. It does not need to be bent in this way. However, if the waterproof sheet 11 is bent at the boundary line L between the valley fold region P and the attachment region Q, the shape restoration property becomes higher and the joint is more easily blocked, so that the waterproof property becomes higher. Further, if the end of the valley fold region P on the attachment region Q side is bent along the length direction at the folds 15, 15, the bendability is enhanced, so the outer wall material to which the waterproof member 10 is attached is provided. When transporting, the waterproof member 10 can be easily placed along the edge of the outer wall material, and when the waterproof member 10 is constructed, the valley fold region P is easily arranged on the surface side of the outer wall material. Can be folded. Note that the number of folds 15 may be one.
In the waterproof member 10, the waterproof layer 12 is formed on one surface of the end portion of the waterproof sheet 11 such that the surface of the waterproof layer 12 and the tip of the fold 13 of the valley fold region P face each other. The waterproof layer 12 may be formed on both surfaces of the end portion of the waterproof sheet 11.

次に、上記防水部材１０を使用した外壁目地の防水構造（以下、防水構造と略す。）の一実施形態例について説明する。
図３及び図４に、本実施形態例の防水構造を示す。この防水構造１は、第１の躯体である第１の柱２０ａ及び第１の柱２０ａに取り付けられた第１の外壁材３０ａと、第２の躯体である第２の柱２０ｂ及び第２の柱２０ｂに取り付けられた第２の外壁材３０ｂとが左右に隣接して形成された上下方向の目地４０を、一対の防水部材（第１の防水部材１０ａ、第２の防水部材１０ｂ）により防水するものである。
本実施形態例では、第１の防水部材１０ａは、防水層１２ａに接する取付領域Ｑ１が第１の柱２０ａと第１の外壁材３０ａとの間に挟持され、防水層１２ａが第１の外壁材３０ａの裏面（第１の柱２０ａ側表面）における長辺側の端部に貼着されて取り付けられている。また、第２の防水部材１０ｂは、防水層１２ｂに接する取付領域Ｑ２が第２の柱２０ｂと第２の外壁材３０ｂとの間に挟持され、防水層１２ｂが第２の外壁材３０ｂの裏面（第２の柱２０ｂ側表面）における長辺側の端部に貼着されて取り付けられている。
また、第１の防水部材１０ａに具備された防水シート１１ａの谷折り領域Ｐ１の長さ方向及び第２の防水部材１０ｂに具備された防水シート１１ｂの谷折り領域Ｐ２の長さ方向が目地４０に沿って配置されつつ、重なり合っている。 Next, an example of an embodiment of the waterproof structure of the outer wall joint using the waterproof member 10 (hereinafter abbreviated as a waterproof structure) will be described.
3 and 4 show the waterproof structure of this embodiment. The waterproof structure 1 includes a first pillar 20a that is a first casing and a first outer wall material 30a that is attached to the first pillar 20a, a second pillar 20b that is a second casing, and a second pillar. The joint 40 in the vertical direction formed adjacent to the left and right sides of the second outer wall member 30b attached to the pillar 20b is waterproofed by a pair of waterproof members (first waterproof member 10a and second waterproof member 10b). To do.
In the present embodiment, the first waterproof member 10a is attached region Q 1 in contact with the waterproof layer 12a is sandwiched between the first pillar 20a and the first outer wall member 30a, the waterproof layer 12a is first The outer wall material 30a is attached by being attached to the end portion on the long side of the back surface (the surface on the first pillar 20a side). The second waterproof member 10b is attachment region Q 2 to which contact with the waterproof layer 12b is sandwiched between the second pillar 20b and the second outer wall member 30b, a waterproof layer 12b of the second outer wall member 30b It is attached by being attached to the end portion on the long side of the back surface (the surface on the second pillar 20b side).
Further, the length direction of the valley fold region P 2 of the first waterproof member 10a of the waterproof sheet 11a which is provided in the valley fold region P 1 length direction and a second waterproof member 10b in the provided the tarpaulin 11b It is arranged along the joint 40 and overlaps.

通常、防水部材と柱の境界の小口、防水部材と外壁材の境界の小口には、微小な深さの溝（本実施形態例では溝５０ａ，５０ｂ）が形成されている。本実施形態例では、第１の外壁材３０ａと第１の防水部材１０ａとの境界に形成された溝５０ａに、第２の防水部材１０ｂの外折り部１４ｂが差し込まれて、外折り部１４ｂが第１の外壁材３０ａに接しつつ第２の防水部材１０ｂが固定されている（図５参照）。また、第２の防水部材１０ｂと第２の柱２０ｂとの境界に形成された溝５０ｂに、第１の防水部材１０ａの外折り部１４ａが差し込まれて、外折り部１４ａが第２の柱２０ｂに接しつつ第１の防水部材１０ａが固定されている（図６参照）。   Usually, grooves having a very small depth (grooves 50a and 50b in the present embodiment) are formed in the fore edge at the boundary between the waterproof member and the column, and at the fore edge at the boundary between the waterproof member and the outer wall material. In the present embodiment, the outer folded portion 14b of the second waterproof member 10b is inserted into the groove 50a formed at the boundary between the first outer wall member 30a and the first waterproof member 10a, and the outer folded portion 14b. The second waterproof member 10b is fixed while contacting the first outer wall member 30a (see FIG. 5). Further, the outer folded portion 14a of the first waterproof member 10a is inserted into the groove 50b formed at the boundary between the second waterproof member 10b and the second column 20b, and the outer folded portion 14a becomes the second column. The first waterproof member 10a is fixed in contact with 20b (see FIG. 6).

この防水構造１においては、第１の防水部材１０ａ及び第２の防水部材１０ｂを隠して外観を良くし、また、防水性をより向上させるために、第２の防水部材１０ｂの谷折り領域Ｐ２より屋外側の目地に、発泡樹脂製円柱体からなるバックアップ材６１を充填した上でコーキング材６２を充填したり（図７参照）、ガスケット６３を挿入したりしてもよい（図８参照）。このように、バックアップ材６１、コーキング材６２やガスケット６３を目地に充填し、さらに、図示例のように、これらを第２の防水部材１０ｂを押圧した際には、第１の防水部材１０ａと第１の柱２０ａ及び第２の柱２０ｂとの隙間がなくなるため、より防水性が高くなる。 In the waterproof structure 1, in order to hide the first waterproof member 10a and the second waterproof member 10b to improve the appearance and to further improve the waterproof property, the valley fold region P of the second waterproof member 10b is used. 2 may be filled with a backup material 61 made of a foamed resin cylinder and then filled with a caulking material 62 (see FIG. 7), or a gasket 63 may be inserted (see FIG. 8). ). Thus, when the back-up material 61, the caulking material 62, and the gasket 63 are filled in the joint, and when these are pressed against the second waterproof member 10b as shown in the illustrated example, the first waterproof member 10a and Since there is no gap between the first pillar 20a and the second pillar 20b, the waterproof property is further improved.

上記防水構造１を形成する方法の一例について説明する。
まず、工場にて、第１の外壁材３０ａの裏面の長辺側の端部に、防水シート１１ａの谷折り領域Ｐ１が目地側に配置されるように、第１の防水部材１０ａの防水層１２ａを貼着して取り付ける。同様に、第２の外壁材３０ｂの裏面の長辺側の端部に、防水シート１１ｂの谷折り領域Ｐ２が目地側に配置されるように、第２の防水部材１０ｂの防水層１２ｂを貼着して取り付ける。
次いで、第１の外壁材３０ａと第１の柱２０ａとで第１の防水部材１０ａの取付領域Ｑ１を挟みながら、第１の外壁材３０ａを第１の柱２０ａに取り付けて外壁構造体を得る。同様に、第２の外壁材３０ｂと第２の柱２０ｂとで第２の防水部材１０ｂの取付領域Ｑ２を挟みながら、第２の外壁材３０ｂを第２の柱２０ｂに取り付けて外壁構造体を得る。
次いで、外壁構造体を建築物の建築現場に輸送する。その際、防水部材１０ａ，１０ｂは柱２０ａ，２０ｂに沿わせておく。 An example of a method for forming the waterproof structure 1 will be described.
First, at the factory, the end of the long side of the back surface of the first outer wall member 30a, as valley fold region P 1 of the waterproof sheet 11a is placed on the joint side, the waterproof of the first waterproof member 10a The layer 12a is attached and attached. Similarly, the end portions of the long side of the back surface of the second outer wall member 30b, as valley fold region P 2 of the waterproof sheet 11b is disposed on the joint side, the waterproof layer 12b of the second waterproof member 10b Attach and attach.
Next, the first outer wall member 30a is attached to the first pillar 20a while sandwiching the attachment region Q1 of the first waterproof member 10a between the first outer wall member 30a and the first pillar 20a. obtain. Similarly, the second outer wall member 30b is attached to the second pillar 20b while the attachment region Q2 of the second waterproof member 10b is sandwiched between the second outer wall member 30b and the second pillar 20b. Get.
Next, the outer wall structure is transported to the building site of the building. At that time, the waterproof members 10a and 10b are placed along the columns 20a and 20b.

建築現場では、まず、第１の防水部材１０ａの外折り部１４ａを第１の外壁材３０ａの表面側に移動させ、第２の防水部材１０ｂの外折り部１４ｂを第２の外壁材３０ｂの表面側に移動させる。そして、各外壁構造体が互いに隣接するように据え付ける。これにより、目地４０が形成される。
次いで、第１の防水部材１０ａの谷折り領域Ｐ１を、施工用工具を用いて目地４０の中に押し込んで、第２の防水部材１０ｂの谷折り領域Ｐ２より屋内側に配置させると共に、第１の防水部材１０ａにおける外折り部１４ａを、第２の柱２０ｂと第２の防水部材１０ｂとの間の溝５０ｂに差し込んで固定する。次いで、第２の防水部材１０ｂの谷折り領域Ｐ２を、施工用工具を用いて目地４０の中に押し込んで、第２の防水部材１０ｂにおける外折り部１４ｂを、第１の外壁材３０ａと第１の防水部材１０ａとの間の溝５０ａに差し込んで固定する。
このようにして、第１の防水部材１０ａの谷折り領域Ｐ１及び第２の防水部材１０ｂの谷折り領域Ｐ２の長さ方向を目地４０に沿って配置させつつ、谷折り領域Ｐ１，Ｐ２同士を重ね合わせて、目地４０を防水する防水構造１を形成することができる。 In the construction site, first, the outer folded portion 14a of the first waterproof member 10a is moved to the surface side of the first outer wall member 30a, and the outer folded portion 14b of the second waterproof member 10b is moved to the second outer wall member 30b. Move to the surface side. And it installs so that each outer wall structure may mutually adjoin. Thereby, the joint 40 is formed.
Next, the valley fold region P1 of the first waterproof member 10a is pushed into the joint 40 using a construction tool, and is arranged on the indoor side from the valley fold region P2 of the second waterproof member 10b. The outer folded portion 14a of the first waterproof member 10a is inserted into the groove 50b between the second pillar 20b and the second waterproof member 10b and fixed. Next, the valley fold region P2 of the second waterproof member 10b is pushed into the joint 40 using a construction tool, and the outer folded portion 14b of the second waterproof member 10b is connected to the first outer wall member 30a. It inserts and fixes to the groove | channel 50a between the 1st waterproofing members 10a.
Thus, the valley fold regions P 1 , while the length directions of the valley fold region P 1 of the first waterproof member 10 a and the valley fold region P 2 of the second waterproof member 10 b are arranged along the joint 40. The waterproof structure 1 that waterproofs the joint 40 can be formed by overlapping the P 2 .

上述した実施形態例の防水構造１では、第１の防水部材１０ａの防水シート１１ａの谷折り領域Ｐ１及び第２の防水部材１０ｂの防水シート１１ｂの谷折り領域Ｐ２によって目地４０が塞がれているため、屋内側に水が侵入しにくくなっており、防水性に優れている。特に、本実施形態では、第１の防水部材１０ａの外折り部１４ａが溝５０ｂに差し込まれて固定され、第２の防水部材１０ｂの外折り部１４ｂが溝５０ａに差し込まれて固定されて、谷折り領域Ｐ１，Ｐ２同士が重なり合っている上に、第１の防水部材１０ａの折り目１３ａと第２の防水部材１０ｂの折り目１３ｂとが重なるため、より防水性に優れる。これは、谷折り領域Ｐ１，Ｐ２同士の重なり及び折り目１３ａ，１３ｂの重なりによっても防水性を発揮するためである。
また、この防水構造１では、取付領域Ｑ側の端部から折り目１３までの距離と、外折り部１４から折り目１３までの距離とが略同等であるため、谷折り領域Ｐ１，Ｐ２の密着性が高い。その結果、屋外側から屋内側に向けた力が第２の防水部材１０ｂの谷折り領域Ｐ２にかかった際には、第２の防水部材１０ｂの谷折り領域Ｐ２が第１の防水部材１０ａの谷折り領域Ｐ１を押し込み、第１の防水部材１０ａの谷折り領域Ｐ１を広げる。これにより、第１の防水部材１０ａの外折り部１４ａが溝５０ｂに強く押し付けられるため、第１の防水部材１０ａは強固に固定されることになる。したがって、この防水構造１は、屋外側から屋内側に向けた力が第２の防水部材１０ｂの谷折り領域Ｐ２にかかっても破壊されにくい。
さらに、上記防水構造１では、第１の防水部材１０ａの谷折り領域Ｐ１及び第２の防水部材１０ｂの谷折り領域Ｐ２を目地４０の中に押し込み、外折り部１４ａ，１４ｂを溝５０ａ，５０ｂに差し込むだけで防水構造１を形成できるから、防水処理作業の作業性にも優れる。
第１の防水部材１０ａおよび第２の防水部材１０ｂの防水シート１１ａ，１１ｂが、半硬質の無延伸ポリプロピレンである場合には、外折り部１４ａ，１４ｂが溝５０ａ，５０ｂに差し込まれたことは音や感触により確認できるため、施工管理しやすい。 In the waterproof structure 1 of the above-described embodiment, the joint 40 by a valley fold region P 2 tarpaulin 11b of the first waterproof member 10a of the waterproof sheet 11a of valley fold regions P 1 and a second waterproof member 10b is closed Therefore, it is difficult for water to enter the indoor side, and it is highly waterproof. In particular, in this embodiment, the outer fold 14a of the first waterproof member 10a is inserted and fixed in the groove 50b, and the outer fold 14b of the second waterproof member 10b is inserted and fixed in the groove 50a. Since the valley fold regions P 1 and P 2 overlap each other and the fold 13a of the first waterproof member 10a and the fold 13b of the second waterproof member 10b overlap, the waterproof property is further improved. This is because the waterproof property is exhibited also by the overlapping of the valley fold regions P 1 and P 2 and the overlapping of the folds 13a and 13b.
Further, in the waterproof structure 1, and the distance to the fold 13 from the end of the attachment region Q side, because the distance from the outer folded portion 14 until the fold 13 is substantially equal, the valley fold regions P 1, P 2 High adhesion. As a result, when a force directed to the indoor side from the outdoor side is applied to a valley fold region P 2 of the second waterproof member 10b is a valley fold region P 2 of the second waterproof member 10b is first waterproof member push the valley fold region P 1 of 10a, expanding the valley fold region P 1 of the first waterproof member 10a. As a result, the outer folded portion 14a of the first waterproof member 10a is strongly pressed against the groove 50b, so that the first waterproof member 10a is firmly fixed. Therefore, the waterproof structure 1 is not easily destroyed even when a force from the outdoor side toward the indoor side is applied to the valley fold region P2 of the second waterproof member 10b.
Further, in the waterproof structure 1, pushing the valley fold region P 2 of the first waterproof member 10a of the valley fold regions P 1 and a second waterproof member 10b in the joint 40, the outer-folded portion 14a, 14b of the groove 50a , 50b, the waterproof structure 1 can be formed, so that the workability of the waterproofing work is excellent.
When the waterproof sheets 11a and 11b of the first waterproof member 10a and the second waterproof member 10b are semi-rigid unstretched polypropylene, the outer folded portions 14a and 14b are inserted into the grooves 50a and 50b. Because it can be confirmed by sound and touch, construction management is easy.

なお、本発明の防水構造は、上述した実施形態例に限定されない。例えば、上述した実施形態例では、防水部材の外折り部が溝に差し込まれていたが、必ずしも各外折り部が溝に差し込まれていなくてもよい。   The waterproof structure of the present invention is not limited to the above-described embodiment example. For example, in the above-described embodiment, the outer folded portion of the waterproof member is inserted into the groove, but each outer folded portion does not necessarily have to be inserted into the groove.

上述した実施形態例では、防水部材の取付領域が外壁材と柱とに挟まれていたが、外壁材が柱から目地側にはみ出して取り付けられている場合には、その外壁材のはみ出した部分の裏面に、防水部材の防水層を貼着して、防水部材を取り付けてもよい。このような防水構造でも、上記実施形態例と同様の効果を発揮する。特に、外壁材の小口に段差がある場合でも防水処理作業に手間を要さない。   In the above-described embodiment example, the attachment region of the waterproof member is sandwiched between the outer wall material and the column. The waterproof member may be attached by attaching a waterproof layer of the waterproof member to the back surface of the waterproof member. Even with such a waterproof structure, the same effects as those of the above embodiment are exhibited. In particular, even if there is a step in the edge of the outer wall material, no trouble is required for waterproofing work.

また、上述した実施形態例では、外壁材の長辺側の端部に１つの防水部材を取り付けられていたが、外壁材の長辺側の端部に複数の防水部材が取り付けられてもよい。ただし、その場合には、防水性の点から、上側の防水部材の下端が下側の防水部材の上端を覆うようにして継ぐ必要がある。
また、防水部材の防水層が外壁材の裏面に貼着されて取り付けられていたが、外壁材と柱の両方に貼着されて取り付けられていても構わない。
また、上述した実施形態例では、外壁材が左右に隣接して取り付けられていたが、上下に隣接して取り付けられていても構わない。 In the above-described embodiment, one waterproof member is attached to the end portion on the long side of the outer wall material. However, a plurality of waterproof members may be attached to the end portion on the long side of the outer wall material. . However, in that case, from the viewpoint of waterproofness, it is necessary to connect the lower end of the upper waterproof member so as to cover the upper end of the lower waterproof member.
In addition, the waterproof layer of the waterproof member is attached by being attached to the back surface of the outer wall material, but it may be attached by being attached to both the outer wall material and the column.
Further, in the above-described embodiment example, the outer wall material is attached adjacent to the left and right, but may be attached adjacent to the upper and lower sides.

本発明の外壁目地用防水部材の一実施形態例を示す斜視図である。It is a perspective view which shows one example of embodiment of the waterproof member for outer wall joints of this invention. 図１の外壁目地用防水部材の断面図である。It is sectional drawing of the waterproof member for outer wall joints of FIG. 本発明の外壁目地の防水構造の一実施形態例を示す平面図である。It is a top view which shows one embodiment of the waterproof structure of the outer wall joint of this invention. 図３のＢ−Ｂ’断面を拡大した図である。It is the figure which expanded the B-B 'cross section of FIG. 図４の外壁目地の防水構造における要部拡大図である。It is a principal part enlarged view in the waterproof structure of the outer wall joint of FIG. 図４の外壁目地の防水構造における要部拡大図である。It is a principal part enlarged view in the waterproof structure of the outer wall joint of FIG. 図４の外壁目地の防水構造において、目地にバックアップ材およびコーキングを充填した例を示す断面図である。FIG. 5 is a cross-sectional view illustrating an example in which the joint is filled with a backup material and caulking in the waterproof structure of the outer wall joint of FIG. 4. 図４の外壁目地の防水構造において、目地にガスケットを挿入した例を示す断面図である。FIG. 5 is a cross-sectional view showing an example in which a gasket is inserted into the joint in the waterproof structure of the outer wall joint of FIG. 4.

符号の説明Explanation of symbols

１ 防水構造（外壁目地の防水構造）
１０ 防水部材（外壁目地用防水部材）
１０ａ 第１の防水部材
１０ｂ 第２の防水部材
１１，１１ａ，１１ｂ 防水シート
１２，１２ａ，１２ｂ 防水層
１３，１３ａ，１３ｂ，１５ 折り目
１４，１４ａ，１４ｂ 外折り部
２０ａ 第１の柱（第１の躯体）
２０ｂ 第２の柱（第２の躯体）
３０ａ 第１の外壁材
３０ｂ 第２の外壁材
４０ 目地
５０ａ，５０ｂ 溝
Ｐ，Ｐ１，Ｐ２ 谷折り領域
Ｑ，Ｑ１，Ｑ２ 取付領域
Ｌ 境界線 1 Waterproof structure (waterproof structure of outer wall joints)
10 Waterproofing member (waterproofing member for outer wall joints)
DESCRIPTION OF SYMBOLS 10a 1st waterproof member 10b 2nd waterproof member 11, 11a, 11b Waterproof sheet 12, 12a, 12b Waterproof layer 13, 13a, 13b, 15 Fold 14, 14, 14a, 14b Outer fold 20a 1st pillar (1st Body)
20b Second pillar (second housing)
30a first outer wall member 30b second outer wall member 40 joints 50a, 50b groove P, P 1, P 2 valley folding region Q, Q 1, Q 2 mounting region L borderline

Claims (4)

第１の躯体及び該第１の躯体に取り付けられた第１の外壁材と、第２の躯体及び該第２の躯体に取り付けられた第２の外壁材とで形成された目地を、第１の防水部材および第２の防水部材により防水する外壁目地の防水構造であって、
第１の防水部材および第２の防水部材が、長尺矩形状の可撓性シートからなり、長さ方向に沿って谷折りに折り返された谷折り領域を有する防水シートと、該防水シートの幅方向の一方の端部上に長さ方向に沿って設けられた防水層とを具備する外壁目地用防水部材であり、
第１の防水部材の防水層が、第１の外壁材の第１の躯体側表面に取り付けられ、第２の防水部材の防水層が、第２の外壁材の第２の躯体側表面に取り付けられ、
第１の防水部材および第２の防水部材に各々具備された防水シートの谷折り領域の長さ方向が、目地に沿って配置され、かつ、各谷折り領域が重なり合っていることを特徴とする外壁目地の防水構造。 A joint formed by the first casing and the first outer wall member attached to the first casing, and the second casing and the second outer wall member attached to the second casing, The waterproof structure of the outer wall joint that is waterproofed by the waterproof member and the second waterproof member,
The first waterproof member and the second waterproof member are made of a long rectangular flexible sheet, and have a valley fold region folded back into a valley fold along the length direction, and the waterproof sheet A waterproof member for joints on the outer wall comprising a waterproof layer provided along the length direction on one end in the width direction ;
The waterproof layer of the first waterproof member is attached to the first casing side surface of the first outer wall member, and the waterproof layer of the second waterproof member is attached to the second casing side surface of the second outer wall member. And
The length direction of the valley fold region of the waterproof sheet provided in each of the first waterproof member and the second waterproof member is disposed along the joint, and the valley fold regions overlap each other. Waterproof structure on the outer wall joint. 第１の防水部材に具備された防水シートの幅方向の他方の端部が、第２の躯体に接し、
第２の防水部材に具備された防水シートの幅方向の他方の端部が、第１の外壁材に接していることを特徴とする請求項１に記載の外壁目地の防水構造。 The other end in the width direction of the waterproof sheet provided in the first waterproof member is in contact with the second casing,
The waterproof structure of the outer wall joint according to claim 1 , wherein the other end portion in the width direction of the waterproof sheet provided in the second waterproof member is in contact with the first outer wall material. 第１の防水部材の谷折り領域及び第２の防水部材の谷折り領域より屋外側の目地に、コーキング材又はガスケットが充填されていることを特徴とする請求項１又は２に記載の外壁目地の防水構造。 The joint outdoor side of the valley fold region of the first waterproof member valley fold region and a second waterproof member, the outer wall joint according to claim 1 or 2 caulk or gaskets, characterized in that it is filled Waterproof structure. 防水シートの幅方向の他方の端部が、外側に向けて折曲されていることを特徴とする請求項１〜３のいずれか１項に記載の外壁目地の防水構造。The waterproof structure of the outer wall joint according to any one of claims 1 to 3, wherein the other end portion in the width direction of the waterproof sheet is bent outward.
JP2005347609A 2005-12-01 2005-12-01 Waterproof structure of exterior wall joint Expired - Fee Related JP4795009B2 (en)

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JP5333288B2 (en) * 2010-02-25 2013-11-06 積水ハウス株式会社 A secondary waterproof member for an outer wall joint, a double waterproof structure for an outer wall joint, and a double waterproof structure construction method for an outer wall joint.
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