JP2004019398A - Roofing structure using board roofing material, and board roofing material for use in the same - Google Patents

Roofing structure using board roofing material, and board roofing material for use in the same Download PDF

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Publication number
JP2004019398A
JP2004019398A JP2002179865A JP2002179865A JP2004019398A JP 2004019398 A JP2004019398 A JP 2004019398A JP 2002179865 A JP2002179865 A JP 2002179865A JP 2002179865 A JP2002179865 A JP 2002179865A JP 2004019398 A JP2004019398 A JP 2004019398A
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Prior art keywords
flat
roofing
roofing material
ridge
gap
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JP2002179865A
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Japanese (ja)
Inventor
Tsuneo Tajima
田島　常雄
Yasuhiro Suzuki
鈴木　康弘
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Tajima Roofing Inc
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Tajima Roofing Inc
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Priority to JP2002179865A priority Critical patent/JP2004019398A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/36—Devices for sealing the spaces or joints between roof-covering elements
    • E04D1/365—Sealing strips between lateral sides of roof-covering elements

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the overlap parts of board roofing materials in the direction of pitch of a roof by preventing percolation of rainwater. <P>SOLUTION: A laminated part 14 is formed in such a manner that an eaves-side undersurface part of the board roofing material 11 on an upstream side is superposed on the ridge-side top surface part of the roofing material 11 on a downstream side in the direction of the pitch of the roof. The roofing materials 11 are sequentially laid in such a manner that an abutting part 15 is formed by making side ends of the adjacent roofing materials 11 butt against each other. A first void part 16 for preventing the rainwater from advancing due to the capillarity phenomenon through a gap made in the laminated part 14 is formed at the end of the laminated part 14; and a second void part 17 for preventing the rainwater from advancing due to the capillarity phenomenon through a gap made in the abutting part 15 is also formed at the end of the abutting part 15. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本願発明は、スレートかわら等の平板屋根材による屋根葺き構造とこれに用いる平板屋根材に関し、詳しくは屋根材の重なり部分や隣接部分からの雨水の侵入を防止するようにした屋根葺き構造とこれに使用する平板屋根材に関するものである。
【０００２】
【従来技術】
従来のスレートかわら等の平板屋根材は、全面が同一厚みの平板形状をなしており、これを用いた屋根葺きは平板屋根材の棟側の端部近傍を釘打ちにより固定し、横方向では隣り合う平板屋根材の側端部同士を突き合わせ、勾配（軒棟）方向においては下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせるようにして施工されている。
【０００３】
図９は、従来の平板屋根材により屋根葺き構造の１例を示す断面図である。
図９（ａ）において、５は屋根面であり、１は屋根面５に敷設されるスレート瓦である。　２はスレート瓦１を屋根面５に固定するための釘であり、各スレート瓦１の上部両縁に打ち込まれている。　スレート瓦１は、水平方向にそれぞれ側端部同士を突き合わせるように並設され、屋根面５の勾配方向で下流側（軒側）から上流側（棟側）にかけては、前列のスレート瓦１に下流側端が重なるように敷設されている。
【０００４】
ここで、前記スレート瓦１の重なり状態は雨水等が各スレート瓦１の重なり部分あるいは当接部分の間隙から毛細管現象等ににより侵入しないように重なり部分が当該スレート瓦１の約６０〜７０％程度に達するまで長く広く設定してある。　ここで、符号１ｂで示すスレート瓦１により、重なり状態を説明すれば、スレート瓦１ｂの両当接部１ａは上流側においては第３列目（下からの列）の、スレート瓦１により塞がれ、下流側においては第１列目（最下列）の、スレート瓦１によって塞がれている。
【０００５】
図９（ｂ）は、前記重なり状態を示す断面図であり、重なり部分は矢符Ｄで示すようにスレート瓦１が３枚重なる状態となっている。　以上説明したようなスレート瓦１の敷設構造により、屋根面５への雨水等の侵入を防止するようになっている。
【０００６】
【発明が解決しようとする課題】
しかしながら、上述の従来技術にあっては次のような不都合が生じている。
すなわち、スレート瓦等の平板系屋根葺き瓦は、抄造法等でスラリーを脱水成型した生板を、加圧成型後に養生して平板状に形成したもので、その厚さは一般的に流れ方向で均一に成型されている。　したがって、このような平板系屋根葺き瓦による屋根葺き構造では、瓦相互の重なり部分に強風降雨時に雨水が吹き込むと重なり部分の間隙において生じる毛細管現象により雨水が侵入し瓦の裏面にまで回り込み、漏水発生につながるおそれが生じる。
また、隣接する瓦同士の当接部分の間隙においても毛細管現象による雨水の侵入が起こり、前記と同様に漏水事故の発生原因となる。
【０００７】
このような不都合を防止するため、従来は、前記のような雨水侵入を防止するため、瓦相互の前記重なり部分の面積を当該の約６０〜７０％に達する程度にまで大きくしたり、瓦に水返し溝を設ける等の対策が講じられてきた。
しかしながら、前記重なり部分を大きくするには、瓦の寸法上の制約から前記図Ｘにも示すように、屋根瓦同士の重なりを例えば３枚重ねとせざるを得ない。
このため、瓦の必要枚数が多くなり施工効率の低下やコスト増を招来するうえ、屋根面における瓦の総重量の増化による家屋の耐久性に支障を来すことになる。　また、瓦に水返し溝を設けても、雨水の侵入対策としては十分な効果を得ることができなかった。
【０００８】
【課題を解決するための手段】
本願発明は、上記従来の課題を解決するための平板屋根材による屋根葺き構造を提供するものであり、
勾配方向において下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせて積層部を形成する一方、隣り合う平板屋根材の側端部を相互に突き合わせて当接部を形成することにより順次平板屋根材を敷設してなる屋根葺き構造において、前記積層部の端部には積層部に生じる間隙における雨水の毛細管現象による進行を防止するための第１空隙部を形成するとともに、前記当接部の端部にも当接部に生じる間隙における雨水の毛細管現象による進行を防止するための第２空隙部を形成した平板屋根材による屋根葺き構造である。
【０００９】
上記構成において、断面Ｌ字形状をなし上面に流水溝を有するジョイント板を前記当接部の下面側にＬ字状の立ち上がり部分が平板屋根材の棟側端部と係合するように配設することがある。
【００１０】
上記いずれかの構成において、前記第１空隙部は、上流側の平板屋根材の軒側下面部と下流側の平板屋根材の棟側上面部の端部に形成した薄肉部により構成し、前記第２空隙部は、平板屋根材の棟側端部の両側に形成した隅切部で構成することがある。
【００１１】
また、上記において、前記薄肉部は平板屋根材の棟側上面部の端部に形成した斜面部で構成することがある。
【００１２】
さらに、上記において、前記薄肉部は平板屋根材の棟側上面部の端部に形成した断面Ｌ字の切欠き部で構成することがある。
【００１３】
本願発明はさらに、上記屋根葺き構造を実現する平板屋根材の提供を目的とするもので、この平板屋根材は、
勾配方向において下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせて積層部を形成する一方、隣り合う平板屋根材の側端部を相互に突き合わせて当接部を形成して順次屋根葺きをなし、前記積層部の端部には積層部に生じる間隙における雨水の毛細管現象による進行を防止するための第１空隙部を形成するとともに、前記当接部の端部にも当接部に生じる間隙における雨水の毛細管現象による進行を防止するための第２空隙部を形成するようにした屋根葺き構造における平板屋根材であって、
前記平板屋根材は、水硬性無機質組成物からなる混練物を平板状に成型固化してなり、棟側端部に形成した薄肉部と、棟側端部の両側に形成した隅切部とを具えている。
【００１４】
上記平板屋根材において、前記薄肉部は棟側端部に形成した斜面部で構成することがある。
【００１５】
また、上記において、前記薄肉部は棟側端部に形成した断面Ｌ字の切欠き部で構成することがある。
【００１６】
さらに、上記いずれかの平板屋根材において、前記水硬性無機質組成物は、高炉スラグ微粉末２０〜８０重量部、フライアッシュ２０〜８０重量部、硬化促進材０．１〜４０重量部とを合計１００重量部となすことがある。
【００１７】
またさらに、上記において、硬化促進材は、アルカリ刺激剤となすことがある。
【００１８】
また、上記いずれかにおいて、前記水硬性無機質組成物からなる混練物は、高炉スラグ、フライアッシュ、硬化促進材からなる水硬性組成物と繊維補強材と所定の顔料と水の混練物で構成することがある。
【００１９】
そして、上記において、水硬性組成物は高炉スラグ微粉末２０〜８０重量部、フライアッシュ２０〜８０重量部、硬化促進材０．１〜４０重量部とを合計１００重量部としてなり、硬化促進材は、アルカリ刺激剤となすことがある。
【００２０】
また、上記において、繊維補強材は水硬性組成物に対して外割りで０．００１〜１０部の割合で添加することがある。
【００２１】
また、上記において、さらに、砂利その他の骨材を水硬性組成物に対して外割りで５０〜３００部の割合で添加することがある。
【００２２】
【発明の実施形態】
図面に基づいて本願発明に係る平板屋根材による屋根葺き構造の一実施形態を説明する。
図１は、屋根葺き構造の一部切欠斜視図である。　図において、１１は屋根下地部１２上に下葺き材１３を介して設置される平板屋根材であり、これら平板屋根材１１、１１．．は、矢符に示す屋根勾配方向において下流側の平板屋根材１１の棟側上面部に上流側の平板屋根材１１の軒側下面部を重ね合わせて葺き工事がなされ重ねあわせ部分に積層部１４が形成されている。なお、図１において、１８は後述のジョイント板である。
【００２３】
また、隣り合う平板屋根材１１では、図２に示すように互いの側端部を突き合わせて当接部１５を形成するようにして、順次平板屋根材を敷設してなる屋根葺きがなされている。　そして、前記積層部１４の終端には、図３に示すように積層部１４に生じる間隙における雨水の毛細管現象による進行を防止するための第１空隙部１６が形成されている。そして、前記当接部１５の終端部にも、図２に示すように当接部１５に生じる間隙における雨水の毛細管現象による進行を防止するための第２空隙部１７を形成してある。
【００２４】
図４は、前記ジョイント板１８の斜視図であり、このジョイント板１８は断面Ｌ字形状をなし前記当接部１５の下面側にＬ字状の立ち上がり部分１８ａが平板屋根材１１の棟側端部と係合するように配設されている。なお、ジョイント板１８の上面には流水溝を設けることがある。
【００２５】
図３に示す前記第１空隙部１６は、上流側の平板屋根材１１の軒側下面部と下流側の平板屋根材１１の棟側上面部の端部に形成した薄肉部１９とにより構成されるが、この薄肉部１９は、この実施形態では、図５に示すように平板屋根材１１の棟側上面部の端部に形成した斜面部１９ａにより構成されている。
【００２６】
さらに、前記第２空隙部１７は、図６に示すように平板屋根材１１の棟側端部の両側に形成した隅切部１７ａ、１７ａが互いに隣接して形成されるスペースで形成されている。
【００２７】
また、図５では、前記薄肉部１９は平板屋根材１１の棟側上面部の端部に形成した斜面部１９ａにより構成する場合を述べたが、薄肉部１９は，図７に示すように棟側上面部の端部に形成した断面Ｌ字の切欠き部１９ｂで構成することがある。
【００２８】
上述のように、屋根勾配方向において下流側の平板屋根材１１の棟側上面部に上流側の平板屋根材１１の軒側下面部を重ね合わせた部分に積層部１４が形成され、この積層部１４における間隙の終端部に、前記薄肉部１９によるオープンスペースである空隙（第１空隙部）が形成されるから、毛細管現象により積層部１４における間隙を進行した雨水は空隙（第１空隙部）に至り表面張力による毛管圧が減殺されてそれ以上の進行は停止する。　また、前記当接部１５の終端部にも、当接部１５に生じる間隙における雨水の毛細管現象による進行を防止するための空隙（第２空隙部）が形成されるから、前述と同様に、毛細管現象により当接部１５における間隙を進行した雨水は空隙（第２空隙部）に至り表面張力による毛管圧が減殺されてそれ以上の進行は停止する。
したがって、積層部１４の屋根勾配方向における長さ、換言すれば平板屋根材１１同士の重なり部分の長さを　従来に比較して著しく短くしても重なり部分からの雨水の浸透を効果的に防ぐことができる。
【００２９】
図８は、前記屋根葺き構造における平板屋根材の一実施形態を示す平面図であり、平板屋根材１１は、水硬性無機質組成物からなる混練物を平板状に成型固化してなり、棟側端部に形成した薄肉部１９と、棟側端部の両側に形成した隅切部１７ａ、１７ａとを具えている。
【００３０】
そして、上記平板屋根材１１において、前記薄肉部１９は図５に示すように棟側端部に形成した斜面部１９ａにより、又は図７に示すように棟側端部に形成した断面Ｌ字の切欠き部１９ｂで構成されている。
【００３１】
さらに、平板屋根材１１を形成する前記水硬性無機質組成物は、高炉スラグ微粉末２０〜８０重量部、フライアッシュ２０〜８０重量部、硬化促進材０．１〜４０重量部とを合計１００重量部となし、硬化促進材としてアルカリ刺激剤を使用して硬化させる。
【００３２】
また、前記水硬性無機質組成物からなる混練物は、高炉スラグ、フライアッシュ、硬化促進材からなる水硬性組成物と繊維補強材と所定の顔料と水の混練物で構成することがあり、この実施形態では繊維補強材としてガラス繊維を使用し、黒褐色の顔料を使用している。　なお、さらに小砂利等の骨材を使用すれば、所望の高強度、高靭性を有し、しかも自然石その他種々の風合いを有する平板屋根材を得ることができる。
【００３３】
【発明の効果】
本願発明は、以上説明したように、屋根勾配方向において下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせた部分における間隙の終端部にオープンスペースである空隙を形成して毛細管現象により間隙を進行する雨水を停止させる一方、隣接する平板屋根材の側端部同士の当接部分における間隙の終端部にも、雨水の毛細管現象による進行を防止するための空隙を形成したので、前記間隙から侵入する雨水による漏水事故を適切に防止できるから、屋根勾配方向において、平板屋根材同士の重なり部分の長さを従来に比較して著しく短くすることが可能となり、単位面積当たりにおける瓦の必要枚数が少なくなり施工効率の向上やコスト削減ができるうえ、屋根面における瓦の総重量の減少により家屋の耐久性も向上する。　また、平板屋根材を高炉スラグ、フライアッシュ、硬化促進材による水硬性組成物により形成したので、比重が比較的小さく、所望の高強度、高靭性を有しかつ緊密な硬化性有する平板屋根材を低廉な原価コストで実現できる。
【図面の簡単な説明】
【図１】屋根葺き構造の実施形態を示す一部切欠斜視図である。
【図２】屋根葺き構造の実施形態を示す平面図である。
【図３】屋根葺き構造の積層部の１実施形態を示す断面図である。
【図４】ジョイント板の実施形態を示す斜視図である。
【図５】図３の屋根葺き構造に使用した平板屋根材の側面図である。
【図６】隣接する平板屋根材の当接部の終端に形成される間隙を示す平面図である。
【図７】屋根葺き構造の積層部の他の実施形態を示す断面図である。
【図８】平板屋根材の１実施形態を示す平面図である。
【図９】従来技術を示す平面図および断面図である
【符号の説明】
１１．．．．．．．．．平板屋根材
１４．．．．．．．．．積層部
１５．．．．．．．．．当接部
１６．．．．．．．．．第１空隙部
１７．．．．．．．．．第２空隙部
１８．．．．．．．．．ジョイント板
１９．．．．．．．．．薄肉部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a roofing structure using a flat roofing material such as slate tile and a flat roofing material used for the same, and more particularly, to a roofing structure and a roofing structure that prevent rainwater from entering an overlapping portion or an adjacent portion of the roofing material. The present invention relates to a flat roofing material used in the present invention.
[0002]
[Prior art]
Conventional flat roof materials such as slate tiles have a flat plate shape with the same thickness on the entire surface, and roofing using this is fixed by nailing near the ridge side end of the flat roof material, and in the horizontal direction The side edges of adjacent flat roofing materials are abutted with each other, and in the gradient (eave building) direction, the eaves lower surface portion of the upstream flat roofing material is superimposed on the ridge side upper surface portion of the downstream flat roofing material. Has been constructed.
[0003]
FIG. 9 is a sectional view showing an example of a conventional roofing structure using a flat roofing material.
In FIG. 9A, 5 is a roof surface, and 1 is a slate tile laid on the roof surface 5. Numerals 2 are nails for fixing the slate tile 1 to the roof surface 5 and are driven into both upper edges of each slate tile 1. The slate roof tiles 1 are arranged side by side so as to abut each other in the horizontal direction. From the downstream side (eave side) to the upstream side (ridge side) in the gradient direction of the roof surface 5, the slate roof tiles 1 in the front row are arranged. Is laid so that the downstream end is overlapped.
[0004]
Here, the overlapping state of the slate roof tiles 1 is about 60 to 70% of the slate roof tiles 1 so that rainwater or the like does not enter the gaps between the overlapping portions or the contact portions of the slate roof tiles 1 by capillary action or the like. It is set long and wide until it reaches the level. Here, the overlapping state is explained by the slate roof tile 1b. If the abutting portions 1a of the slate roof tile 1b are upstream, the abutment portions 1a are closed by the third row (row from the bottom) of the slate roof tile 1b. On the downstream side, the slate roof tile 1 in the first row (bottom row) is closed.
[0005]
FIG. 9B is a cross-sectional view showing the overlapping state, and the overlapping portion is in a state where three slate roof tiles 1 are overlapped as indicated by an arrow D. The laying structure of the slate roof tile 1 as described above prevents rainwater or the like from entering the roof surface 5.
[0006]
[Problems to be solved by the invention]
However, the above-described conventional technology has the following disadvantages.
In other words, flat roofing tiles such as slate tiles are formed by flattening a raw sheet obtained by dewatering a slurry by a papermaking method and curing it after pressure molding, and its thickness is generally in the flow direction. It is molded uniformly. Therefore, in such a roofing structure using flat roofing tiles, when rainwater blows into the overlapping portions of the tiles during strong wind rain, the rainwater enters due to the capillary phenomenon generated in the gap between the overlapping portions and spills to the back surface of the tiles, resulting in water leakage. There is a possibility that it will lead to occurrence.
Also, rainwater infiltrates due to the capillary phenomenon in the gap between the abutting portions of adjacent tiles, which causes a water leakage accident as described above.
[0007]
Conventionally, in order to prevent such inconvenience, in order to prevent the above-mentioned infiltration of rainwater, the area of the overlapping portion between the tiles is increased to about 60 to 70% of that of the tiles, Countermeasures such as providing a water return groove have been taken.
However, in order to increase the overlapping portion, the roof tiles must be overlapped with each other, for example, as shown in FIG.
For this reason, the required number of tiles increases, resulting in a decrease in construction efficiency and an increase in cost. In addition, the increase in the total weight of the roof tiles impairs the durability of the house. Also, even if a water return groove is provided in the roof tile, a sufficient effect as a countermeasure against rainwater intrusion cannot be obtained.
[0008]
[Means for Solving the Problems]
The present invention provides a roofing structure using a flat roofing material to solve the above-mentioned conventional problems,
In the gradient direction, the eaves lower surface of the upstream flat roof material is overlapped on the ridge side upper surface of the downstream flat roof material to form a laminate, while the side edges of adjacent flat roof materials are butted against each other. In the roofing structure in which a flat roof material is sequentially laid by forming an abutting portion, an end of the laminated portion is provided with a first portion for preventing the progress of rainwater by capillary action in a gap generated in the laminated portion. A roofing structure with a flat roof material having a gap formed therein and a second gap formed at an end of the contact portion to prevent progress of rainwater in a gap generated in the contact portion by capillary action. .
[0009]
In the above configuration, a joint plate having an L-shaped cross section and having a water flow groove on an upper surface is disposed on a lower surface side of the contact portion so that an L-shaped rising portion is engaged with a ridge side end portion of the flat roof material. Sometimes.
[0010]
In any one of the above structures, the first gap portion is formed by a thin portion formed at an end of an eaves-side lower surface portion of an upstream flat roof material and a ridge-side upper surface portion of a downstream flat roof material, The second gap may be formed by corner cuts formed on both sides of the ridge-side end of the flat roof material.
[0011]
In the above, the thin portion may be constituted by a slope portion formed at an end of a ridge-side upper surface portion of the flat roof material.
[0012]
Further, in the above description, the thin portion may be constituted by a cutout having an L-shaped cross section formed at an end of a ridge side upper surface portion of the flat roof material.
[0013]
The present invention further aims at providing a flat roof material realizing the roofing structure, and the flat roof material is
In the gradient direction, the eaves lower surface of the upstream flat roof material is overlapped on the ridge side upper surface of the downstream flat roof material to form a laminate, while the side edges of adjacent flat roof materials are butted against each other. A contact portion is formed to form a roof in order, and a first gap portion is formed at an end of the stacked portion to prevent rainwater from proceeding by capillary action in a gap generated in the stacked portion. A flat roofing material in a roofing structure configured to form a second void portion for preventing the progress of rainwater in a gap generated in the contact portion also at an end of the contact portion by capillary action,
The flat roof material is obtained by molding and kneading a kneaded product made of a hydraulic inorganic composition into a flat plate shape, and forming a thin-walled portion formed at the ridge end and corner cut portions formed on both sides of the ridge end. I have it.
[0014]
In the flat roofing material, the thin portion may be constituted by a slope formed at an end on the ridge side.
[0015]
In the above description, the thin portion may be constituted by a cutout having an L-shaped cross section formed at the ridge end.
[0016]
Further, in any of the flat roofing materials described above, the hydraulic inorganic composition comprises 20 to 80 parts by weight of blast furnace slag fine powder, 20 to 80 parts by weight of fly ash, and 0.1 to 40 parts by weight of a hardening accelerator. May be 100 parts by weight.
[0017]
Still further, in the above, the curing accelerator may serve as an alkali stimulant.
[0018]
In any one of the above, the kneaded product composed of the hydraulic inorganic composition comprises a kneaded product of a blast furnace slag, a fly ash, a hydraulic composition composed of a curing accelerator, a fiber reinforcing material, a predetermined pigment, and water. Sometimes.
[0019]
And, in the above, the hydraulic composition comprises a blast furnace slag fine powder of 20 to 80 parts by weight, a fly ash of 20 to 80 parts by weight, and a hardening accelerator of 0.1 to 40 parts by weight as a total of 100 parts by weight. May be an alkaline stimulant.
[0020]
In the above description, the fiber reinforcing material may be added to the hydraulic composition at a ratio of 0.001 to 10 parts on an external basis.
[0021]
Further, in the above, gravel or other aggregate may be further added to the hydraulic composition at a rate of 50 to 300 parts on an external basis.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a roofing structure using a flat roofing material according to the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway perspective view of a roofing structure. In the figure, reference numeral 11 denotes a flat roofing material which is installed on a roof base 12 via an underlaying material 13, and these flat roofing materials 11, 11,. . In the roof gradient direction indicated by the arrow, roofing work is performed by superimposing the eaves-side lower surface portion of the upstream flat roofing material 11 on the ridge-side upper surface portion of the downstream flat roofing material 11, and the stacking portion 14 is formed on the overlapping portion. Is formed. In FIG. 1, reference numeral 18 denotes a joint plate described later.
[0023]
In addition, in the adjacent flat roofing material 11, as shown in FIG. 2, the roofing is performed by sequentially laying the flat roofing material so that the side end portions thereof abut each other to form the contact portion 15. . As shown in FIG. 3, a first gap portion 16 is formed at the end of the stacked portion 14 to prevent rainwater from progressing in the gap formed in the stacked portion 14 due to capillary action. Further, a second gap portion 17 for preventing the progress of rainwater in the gap formed in the contact portion 15 due to the capillary action is also formed at the end portion of the contact portion 15 as shown in FIG.
[0024]
FIG. 4 is a perspective view of the joint plate 18. The joint plate 18 has an L-shaped cross section, and an L-shaped rising portion 18 a is formed on the lower surface side of the contact portion 15 at the ridge end of the flat roofing material 11. It is arranged to engage with the part. In addition, a flowing water groove may be provided on the upper surface of the joint plate 18.
[0025]
The first gap 16 shown in FIG. 3 is composed of an eaves lower surface portion of the upstream flat roof material 11 and a thin portion 19 formed at an end of the ridge side upper surface portion of the downstream flat roof material 11. However, in this embodiment, the thin portion 19 is constituted by a slope portion 19a formed at the end of the ridge-side upper surface portion of the flat roof material 11 as shown in FIG.
[0026]
Further, as shown in FIG. 6, the second gap 17 is formed by a space in which corner cutouts 17a, 17a formed on both sides of the ridge side end of the flat roofing material 11 are formed adjacent to each other. .
[0027]
In FIG. 5, the thin portion 19 is described as being constituted by a slope portion 19 a formed at the end of the ridge side upper surface portion of the flat roofing material 11, but the thin portion 19 is formed as shown in FIG. 7. It may be constituted by a notch 19b having an L-shaped cross section formed at the end of the side upper surface.
[0028]
As described above, the laminated portion 14 is formed at a portion where the lower surface portion of the upstream flat roof material 11 on the ridge side of the upstream flat roof material 11 is overlapped with the upper surface portion of the flat roof material 11 on the downstream side in the roof gradient direction. Since a gap (first gap) which is an open space formed by the thin portion 19 is formed at the end of the gap in the gap 14, rainwater that has progressed through the gap in the laminated section 14 due to the capillary phenomenon is a gap (first gap). Then, the capillary pressure due to the surface tension is reduced, and further progress stops. In addition, a gap (second gap) for preventing the progress of rainwater by capillary action in the gap formed in the contact section 15 is also formed at the terminal end of the contact section 15, as described above. The rainwater that has progressed through the gap in the contact portion 15 due to the capillary action reaches the gap (second gap), the capillary pressure due to surface tension is reduced, and further progress stops.
Therefore, even if the length of the laminated portion 14 in the roof gradient direction, in other words, the length of the overlapping portion between the flat roofing materials 11 is significantly shortened as compared with the related art, it is possible to effectively prevent the penetration of rainwater from the overlapping portion. be able to.
[0029]
FIG. 8 is a plan view showing an embodiment of the flat roofing material in the roofing structure. The flat roofing material 11 is obtained by molding and kneading a kneaded product made of a hydraulic inorganic composition into a flat plate shape. It has a thin portion 19 formed at the end and corner cutouts 17a formed at both sides of the ridge end.
[0030]
In the flat roofing material 11, the thin portion 19 is formed by a slope portion 19a formed at the ridge end as shown in FIG. 5 or an L-shaped cross section formed at the ridge side end as shown in FIG. It is constituted by a notch 19b.
[0031]
Further, the hydraulic inorganic composition forming the flat roofing material 11 comprises 20 to 80 parts by weight of blast furnace slag fine powder, 20 to 80 parts by weight of fly ash, and 0.1 to 40 parts by weight of a hardening accelerator in a total of 100 parts by weight. And curing using an alkali stimulant as a curing accelerator.
[0032]
Further, the kneaded product composed of the hydraulic inorganic composition may be constituted by a kneaded product of a blast furnace slag, a fly ash, a hydraulic composition composed of a curing accelerator, a fiber reinforcing material, a predetermined pigment, and water. In the embodiment, a glass fiber is used as a fiber reinforcing material, and a black-brown pigment is used. If an aggregate such as small gravel is further used, a flat roofing material having desired high strength and high toughness, natural stone and other various textures can be obtained.
[0033]
【The invention's effect】
As described above, the present invention provides an open space at a terminal end of a gap in a portion where an eaves lower surface portion of an upstream flat roof material is superimposed on a ridge side upper surface portion of a downstream flat roof material in a roof gradient direction. To prevent rainwater from advancing through the gap by capillary action, and also prevent rainwater from proceeding at the end of the gap at the abutment between the side edges of adjacent flat roofing materials. Since the gap for forming the gap is formed, it is possible to appropriately prevent a water leakage accident due to rainwater entering from the gap, and in the roof gradient direction, the length of the overlapping portion between the flat roof materials is significantly shortened as compared with the related art. And the required number of tiles per unit area is reduced, improving construction efficiency and reducing costs. In addition, the total weight of tiles on the roof surface is reduced and the durability of the house is reduced. It is also improved. In addition, since the flat roofing material is formed from a hydraulic composition using blast furnace slag, fly ash, and a hardening accelerator, the flat roofing material has a relatively small specific gravity, has a desired high strength, high toughness, and has a tight hardening property. Can be realized at low cost cost.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing an embodiment of a roofing structure.
FIG. 2 is a plan view showing an embodiment of a roofing structure.
FIG. 3 is a cross-sectional view showing one embodiment of a laminated portion of a roofing structure.
FIG. 4 is a perspective view showing an embodiment of a joint plate.
FIG. 5 is a side view of a flat roofing material used for the roofing structure of FIG. 3;
FIG. 6 is a plan view showing a gap formed at an end of an abutting portion of an adjacent flat roof material.
FIG. 7 is a cross-sectional view showing another embodiment of the laminated portion of the roofing structure.
FIG. 8 is a plan view showing an embodiment of a flat roofing material.
FIG. 9 is a plan view and a cross-sectional view showing a conventional technique.
11. . . . . . . . . 13. Flat roof material . . . . . . . . Laminated part 15. . . . . . . . . Contact part 16. . . . . . . . . First void portion 17. . . . . . . . . Second gap 18. . . . . . . . . Joint plate 19. . . . . . . . . Thin part

Claims (14)

勾配方向において下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせて積層部を形成する一方、隣り合う平板屋根材の側端部を相互に突き合わせて当接部を形成することにより順次平板屋根材を敷設してなる屋根葺き構造において、前記積層部の端部には積層部に生じる間隙における雨水の毛細管現象による進行を防止するための第１空隙部を形成するとともに、前記当接部の端部にも当接部に生じる間隙における雨水の毛細管現象による進行を防止するための第２空隙部を形成したことを特徴とする平板屋根材による屋根葺き構造。The eaves lower surface of the upstream flat roofing material is superimposed on the ridge side upper surface of the downstream flat roofing material in the gradient direction to form a laminated part, while the side edges of adjacent flat roofing materials are butted against each other. In the roofing structure in which a flat roof material is sequentially laid by forming an abutting portion, an end of the laminated portion is provided with a first portion for preventing the progress of rainwater by capillary action in a gap generated in the laminated portion. A flat roof material comprising a void portion and a second void portion formed at an end of the contact portion to prevent the progress of rainwater by capillary action in a gap generated in the contact portion. Roofing structure. 請求項１において、断面Ｌ字形状をなし上面に流水溝を有するジョイント板を前記当接部の下面側にＬ字状の立ち上がり部分が平板屋根材の棟側端部と係合するように配設したことを特徴とする平板屋根材による屋根葺き構造。2. The joint plate according to claim 1, wherein a joint plate having an L-shaped cross section and having a water flow groove on an upper surface is disposed on a lower surface side of the contact portion such that an L-shaped rising portion is engaged with a ridge-side end portion of the flat roof material. A roofing structure using flat roofing material. 請求項１また２いずれかにおいて、前記第１空隙部は、上流側の平板屋根材の軒側下面部と下流側の平板屋根材の棟側上面部の端部に形成した薄肉部により構成し、前記第２空隙部は、平板屋根材の棟側端部の両側に形成した隅切部で構成したことを特徴とする平板屋根材による屋根葺き構造。The first gap portion according to any one of claims 1 and 2, wherein the first gap portion is formed by a thin wall portion formed at an end of an eaves lower surface portion of the upstream flat roof material and a ridge side upper surface portion of the downstream flat roof material. The roofing structure with a flat roofing material, wherein the second gap portion is formed by corner cutouts formed on both sides of a ridge side end of the flat roofing material. 請求項３において、前記薄肉部は平板屋根材の棟側上面部の端部に形成した斜面部で構成したことを特徴とする平板屋根材による屋根葺き構造。4. The roofing structure according to claim 3, wherein the thin portion is constituted by a slope formed at an end of a ridge side upper surface of the flat roof material. 請求項３において、前記薄肉部は平板屋根材の棟側上面部の端部に形成した断面Ｌ字の切欠き部で構成したことを特徴とする平板屋根材による屋根葺き構造。4. The roofing structure according to claim 3, wherein the thin portion is formed by a notch having an L-shaped cross section formed at an end of a ridge side upper surface portion of the flat roof material. 勾配方向において下流側の平板屋根材の棟側上面部に上流側の平板屋根材の軒側下面部を重ね合わせて積層部を形成する一方、隣り合う平板屋根材の側端部を相互に突き合わせて当接部を形成して順次屋根葺きをなし、前記積層部の端部には積層部に生じる間隙における雨水の毛細管現象による進行を防止するための第１空隙部を形成するとともに、前記当接部の端部にも当接部に生じる間隙における雨水の毛細管現象による進行を防止するための第２空隙部を形成するようにした屋根葺き構造における平板屋根材であって、
前記平板屋根材は、水硬性無機質組成物からなる混練物を平板状に成型固化してなり、棟側端部に形成した薄肉部と、、棟側端部の両側に形成した隅切部とを具えた平板屋根材。In the gradient direction, the eaves lower surface of the upstream flat roof material is overlapped on the ridge side upper surface of the downstream flat roof material to form a laminate, while the side edges of adjacent flat roof materials are butted against each other. A contact portion is formed to form a roof in order, and a first gap portion is formed at an end of the stacked portion to prevent rainwater from proceeding by capillary action in a gap generated in the stacked portion. A flat roofing material in a roofing structure configured to form a second void portion for preventing the progress of rainwater in a gap generated in the contact portion also at an end of the contact portion by capillary action,
The flat roof material is obtained by molding and solidifying a kneaded product made of a hydraulic inorganic composition into a flat plate shape, a thin portion formed at the ridge end, and a corner cut portion formed on both sides of the ridge end. Flat roofing material. 請求項６において、前記薄肉部は棟側端部に形成した斜面部で構成したことを特徴とする平板屋根材。The flat roofing material according to claim 6, wherein the thin portion is formed by a slope formed at a ridge end. 請求項６において、前記薄肉部は棟側端部に形成した断面Ｌ字の切欠き部で構成したことを特徴とする平板屋根材。7. The flat roofing material according to claim 6, wherein the thin portion is constituted by a cutout having an L-shaped cross section formed at an end on the ridge side. 請求項６ないし８いずれかにおいて、前記水硬性無機質組成物は、高炉スラグ微粉末２０〜８０重量部、フライアッシュ２０〜８０重量部、硬化促進材０．１〜４０重量部とを合計１００重量部としてなることを特徴とする平板屋根材。9. The hydraulic inorganic composition according to claim 6, wherein a total of 100 to 80 parts by weight of the blast furnace slag fine powder, 20 to 80 parts by weight of fly ash, and 0.1 to 40 parts by weight of the hardening accelerator is used. Flat roofing material characterized by becoming a part. 請求項９において、硬化促進材は、アルカリ刺激剤であることを特徴とする平板屋根材。The flat roofing material according to claim 9, wherein the curing accelerator is an alkali stimulant. 請求項６ないし８いずれかにおいて、前記水硬性無機質組成物からなる混練物は、高炉スラグ、フライアッシュ、硬化促進材からなる水硬性組成物と繊維補強材と所定の顔料と水の混練物であることを特徴とする平板屋根材。The kneaded product comprising the hydraulic inorganic composition according to any one of claims 6 to 8, wherein the kneaded product is a kneaded product of a blast furnace slag, fly ash, a hydraulic composition comprising a curing accelerator, a fiber reinforcing material, a predetermined pigment, and water. A flat roofing material characterized by the following. 請求項１１において、水硬性組成物は高炉スラグ微粉末２０〜８０重量部、フライアッシュ２０〜８０重量部、硬化促進材０．１〜４０重量部とを合計１００重量部としてなり、硬化促進材は、アルカリ刺激剤であることを特徴とする平板屋根材。The hardening composition according to claim 11, wherein the hydraulic composition comprises a total of 100 parts by weight of 20 to 80 parts by weight of blast furnace slag fine powder, 20 to 80 parts by weight of fly ash, and 0.1 to 40 parts by weight of a hardening accelerator. Is a flat roofing material characterized by being an alkali stimulant. 請求項１２において、繊維補強材は水硬性組成物に対して外割りで０．００１〜１０部の割合で添加したことを特徴とする平板屋根材。13. The flat roofing material according to claim 12, wherein the fiber reinforcing material is added to the hydraulic composition in an outer ratio of 0.001 to 10 parts. 請求項１３において、さらに、砂利その他の骨材を水硬性組成物に対して外割りで５０〜３００部の割合で添加したことを特徴とする平板屋根材。14. The flat roofing material according to claim 13, wherein gravel and other aggregates are further added to the hydraulic composition at a rate of 50 to 300 parts by weight.
JP2002179865A 2002-06-20 2002-06-20 Roofing structure using board roofing material, and board roofing material for use in the same Pending JP2004019398A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002137A (en) * 2007-05-24 2009-01-08 Hoshino Sansho:Kk Roof material and snow melting type roof structure
JP2011163094A (en) * 2010-02-15 2011-08-25 Ever Kk Draining member
US11578494B2 (en) * 2017-06-05 2023-02-14 Millennium Slate, Llc Roofing system and method
US11927017B2 (en) 2017-06-05 2024-03-12 Millennuim Slate, LLC Roofing system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002137A (en) * 2007-05-24 2009-01-08 Hoshino Sansho:Kk Roof material and snow melting type roof structure
JP2011047275A (en) * 2007-05-24 2011-03-10 Hoshino Sansho:Kk Roof material and snow-melting type roof structure
JP2011163094A (en) * 2010-02-15 2011-08-25 Ever Kk Draining member
US11578494B2 (en) * 2017-06-05 2023-02-14 Millennium Slate, Llc Roofing system and method
US11927017B2 (en) 2017-06-05 2024-03-12 Millennuim Slate, LLC Roofing system and method

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