【０００１】
【発明の属する技術分野】
本発明は瓦屋根用防水シートに関する。
【０００２】
【従来の技術】
一般に、桟瓦葺きの瓦屋根は垂木に野地板を釘で固定し、野路板に防水シートを敷いてタッカー針で固定し、防水シートの上から瓦桟を釘で野地板に固定し、瓦裏面に設けた爪をこの瓦桟に引っ掛け、さらに瓦の釘穴に釘を打ち込んで瓦を固定している。
この種の瓦屋根に使う防水シートの一形式として、特開２００１−２０４７２号公報には、表面に多数の微少滑り止め突起を形成して、瓦桟の固定作業や瓦噴き作業のとき足元が滑らないようにしたものが開示されている。
この防水シートを野地板に敷いて、その上から瓦桟を固定すると、微少滑り止め突起によって瓦桟の底面と防水シートの間に隙間が形成され。この隙間から雨水が軒側へ流出するので、瓦桟に沿って雨水が溜まり、これが原因で瓦桟が腐食するのを防止できる。
【０００３】
【発明が解決しようとする課題】
上記した従来の瓦屋根用防水シートは、全面に微少滑り止め突起を形成しているが、突起の無い部分はシートが薄いので、タッカー針を打ち込んだ部分に、作業者の足圧や、昼夜の温度差に起因する膨張収縮によって亀裂が生じ易く、そこから雨水が浸入するおそれがある。
また、シートを複数枚敷いたとき、隣接するシート同士の重ね合わせ部分に微少滑り止め突起によって隙間が生じ、強風雨時にその隙間から雨水がシートの裏側へ侵入し、雨漏りの原因となる。
さらに、シートの重ね合わせ部分にタッカー針を打ち込んでシートを固定するとき、微少滑り止め突起による隙間があるためタッカー針がシートに食い込んで亀裂が生じ易く、その亀裂から雨水が侵入するおそれがある。
野地板の上に防水シートを敷いてその上から瓦桟を固定するので、垂木の位置が判り難く、瓦桟を固定する釘を垂木に打ち付ける作業に手間がかかる。
本発明はかかる問題点に鑑み、シート同士の重ね合わせ部分やタッカー針の打ち込み部分からの雨水の侵入を防止し、かつ瓦桟を垂木に固定し易い瓦屋根用防水シートを提供することを目的とする。
【０００４】
【課題を解決するための手段】
上記目的を達成するため本発明は、表面に多数の滑り止め用微少突起を形成した瓦屋根用防水シートであって、表面が平坦でタッカー針の幅より大きい幅を有し高さが前記滑り止め用微少突起と同じ縦帯部を一定間隔で形成し、側縁に表裏両面が平坦で縦帯部と同じ高さを有し、隣接して敷かれるシート同士の重ね合わせ部となる縁帯部を形成したことを特徴とする。
そして、好ましくは前記縦帯部を垂木の間隔で配列する。また、前記縦帯部の両縁を下広がりの傾斜面に形成する。さらに、前記縦帯部と縦帯部の中間に縦帯部と同じ高さを有する水返し用帯部を縦帯部と平行に形成する。
【０００５】
【発明の作用・効果】
本発明によれば、表面が平坦で厚みが滑り止め用微小突起の高さと同じ縦帯部を設けたので、ここにタッカー針を打ち込んでシートを固定すれば、厚みがあるので作業者の足圧が加わったり、昼夜の温度差で膨張収縮してもタッカー針の打ち込み個所に亀裂が生じ難い。また、表裏両面が平坦な側帯部を設けたので、側帯部を重ね合わせるようにして隣接するシートを敷けば、シート同士の重ね合わせ部に隙間が生じない。そのため、重ね合わせ部から雨水が浸入したり、重ね合わせ部にタッカー針を打ち込んだとき亀裂が生じるのを防止できる。
そして、縦帯部を垂木の間隔で配置することで、垂木の位置を示す目印となるので、瓦桟に釘を打ち込んで垂木に固定する作業が容易になる。
また、縦帯部の両縁を下広がりの傾斜面にすることで、雨水が縦帯部の表面から傾斜面を伝って流れ下るので、縦帯部に雨水が溜まり難くなり、縦帯部に打ち込んだタッカー針の針穴から雨水がシートの裏側へ侵入するのを防止できる。
さらに、縦帯部と縦帯部の中間に水返し用帯部を設けることにより、隣接するシートの横縁の重ね合わせ部分に雨水が侵入するのを防止できる。
【０００６】
【発明の実施の形態】
以下に本発明を図面に基づき説明するに、図１には本発明の一実施形態に係る瓦屋根用防水シート１０が示されている。当該防水シート１０は合成ゴム、天然ゴム、合成樹脂等の防水性及び耐久性を有する樹脂シートからなり、表面には３本の縦帯部１１が一定の間隔で平行に形成され、縦帯部１１と縦帯部１１の中間に縦帯部１１と平行に幅の狭い水返し用帯部１２が形成されている。水返し用帯部１２の下端部には菱形部１３が形成されている。シート１０の上側縁部に横に延びる側帯部１４が形成されている。側帯部１４の中間部より若干端側に、横に延びる水返し用凸条１５が形成されている。側帯部１４と縦帯部１１及び水返し用帯部１２の表面は平坦に形成されている。側帯部１４と縦帯部１１及び水返し用帯部１２の形成された部分以外の表面領域には多数の滑り止め用微少突起１６が形成されている。一方、防水シート１０の裏面は平坦に形成されている。
【０００７】
縦帯部１１は両側面が下広がりの傾斜面１１ａに成形され（図３参照）、幅はタッカー針１７を打ち込んでもはみ出ないように針幅より大きく設定されている。また、縦帯部１１と縦帯部１１の間隔は屋根の垂木１８と垂木１８の間隔に等しくなるように設定されている。菱形部１３もタッカー針１７がはみ出ないようにその大きさが設定されている。縦帯部１１、水返し用帯部１２、菱形部１３及び側帯部１４はいずれも高さが滑り止め用微少突起と同じになるように、その厚みが設定されている。
【０００８】
本実施形態に係る瓦屋根用防水シート１０の構造は以上の通りであって、図２〜図４にその使用方法を示す。図２に示すように、軒側から棟側へ順に防水シート１０を野地板１９の上に敷いていく。軒先のシート１０を敷くとき、側帯部１４が棟側に位置するように、かつ縦帯部１１が垂木１８の位置に重なるように、敷く位置を調整する。軒先のシート１０を敷いたら、縦帯部１１と菱形部１３にタッカー針１７を打ち込んで、防水シート１０を野地板１９に固定する。次に、隣接するシート１０を敷く。このとき軒先のシート１０の側帯部１４に隣接するシート１０の半側帯部側の端部を重ね合わせると共に、軒先のシート１０の縦帯部１１と隣接するシート１０の縦帯部１１が整列するように隣接するシート１０を敷き、タッカー針１７で固定する。タッカー針１７はシート１０同士の重ね合わせ部分の縦帯部１１と菱形部１７にも打ち込んで、両シート１０を野地板１９に固定する。
【０００９】
次ぎに、タッカー針１７で野地板１９に固定した防水シート１０の上から瓦桟２０を所定の間隔で並べて釘２１で固定する。図３に示すように、釘２１を縦帯部１１の位置に打ち込むことで、その下にある垂木１８にまで釘２１を打ち込むことができる。そして、図４に示すように、瓦桟２０に瓦２２の爪２２ａを引っ掛けて瓦２２を葺く。
【００１０】
本実施形態に係る瓦屋根用防水シート１０は、表面が平坦で厚みが滑り止め用微小突起１６の高さと同じ縦帯部１１を設けたので、ここにタッカー針１７を打ち込んでシート１０を固定すれば、厚みがあるので作業者の足圧が加わったり、昼夜の温度差で膨張収縮してもタッカー針１７の打ち込み個所に亀裂が生じ難い。また、表裏両面が平坦な側帯部１４を設けたので、側帯部１４を重ね合わせるようにして隣接するシート１０を敷けば、シート１０同士の重ね合わせ部は平坦な側帯部１４同士が重なることになり、隙間が生じない。加えて、側帯部１４に水返し用凸条１５を設けたので、重ね合わせ部から雨水が浸入しするのを確実に防止できる。
【００１１】
縦帯部１１を垂木１８の間隔で配置したので、垂木１８の位置を示す目印となり、瓦桟２０に釘２１を打ち込んで垂木１８に強固に固定できる。
また、縦帯部１１の両縁を下広がりの傾斜面１１ａにしたので、雨水が縦帯部１１の表面から傾斜面１１ａを伝って流れ下る。従って、縦帯部１１に雨水が溜まり難くなり、縦帯部１１に打ち込んだタッカー針１７の針穴から雨水がシート１０の裏側へ侵入するのを防止できる。
さらに、縦帯部１１と縦帯部１１の中間に水返し用帯部１２を設けたので、隣接するシート１０の横縁の重ね合わせ部分に雨水が侵入するのを防止できる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る瓦屋根用防水シートを示す斜視図である。
【図２】同防水シートの使用方法を示す斜視図である。
【図３】図２の３−３線から切断した拡大断面図である。
【図４】本発明の一実施形態に係る防水シートを使用した瓦屋根を示す部分断面図である。
【符号の説明】
１０…瓦屋根用防水シート、１１…縦帯部、１２…水返し用帯部、１３…菱形部、１４…側帯部、１５…水返し用凸条、１６…滑り止め用微少突起、１７…タッカー針、１８…垂木、１９…野地板、２０…瓦桟、２１…釘。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a waterproof sheet for a tiled roof.
[0002]
[Prior art]
In general, a tiled roof with a tiled roof is fixed with rafters to the ground board with nails, a waterproof sheet is laid on the field board and fixed with a tucker needle, and a tile bar is fixed to the field board with nails from above the waterproof sheet, and the back of the tile The hook provided on the roof tile is hooked on the roof tile, and a nail is driven into the nail hole of the roof tile to fix the roof tile.
As one type of waterproof sheet used for this type of tiled roof, Japanese Patent Application Laid-Open Publication No. 2001-20472 discloses that a large number of minute anti-slip projections are formed on the surface so that a foot can be used for fixing work of tile roof or blowing tile work. A non-slip one is disclosed.
When this waterproof sheet is laid on a field board and the roof tile is fixed from above, a gap is formed between the bottom surface of the roof tile and the waterproof sheet by the minute anti-slip projection. Since the rainwater flows out to the eaves side from this gap, the rainwater accumulates along the roof tiles, which can prevent the roof tiles from being corroded.
[0003]
[Problems to be solved by the invention]
The above-mentioned conventional waterproof sheet for tiled roofs has minute anti-slip projections on the entire surface.Since the sheet without projections is thin, the foot pressure of the worker, Cracks are likely to occur due to expansion and contraction caused by the temperature difference, and rainwater may enter therefrom.
In addition, when a plurality of sheets are laid, a gap is formed by a small anti-slip projection at a portion where adjacent sheets are overlapped with each other, and in a case of strong wind and rain, rainwater enters the back side of the sheet from the gap and causes rain leakage.
Furthermore, when the sheet is fixed by driving the tucker needle into the overlapped portion of the sheet, there is a gap due to the minute anti-slip projection, so that the tucker needle is likely to cut into the sheet and cause a crack, and rainwater may enter from the crack. .
Since the waterproofing sheet is laid on the ground board and the roof tiles are fixed from above, the position of the rafters is difficult to understand, and it takes time and effort to strike nails for fixing the roof tiles into the rafters.
In view of the above problems, an object of the present invention is to provide a waterproofing sheet for a tiled roof that prevents rainwater from entering from a portion where sheets are overlapped or a portion where a tucker needle is driven and that can easily fix a tile bar to a rafter. And
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a waterproof sheet for a tiled roof having a large number of anti-slip microprojections formed on the surface, the surface being flat, having a width larger than the width of the tucker needle, and the height being such that The same vertical band as the microprojection for stopping is formed at regular intervals, the front and back sides are flat on the side edges, the height is the same as the vertical band, and the edge band that is the overlapping part of the sheets laid next to each other A part is formed.
Preferably, the vertical strips are arranged at intervals of rafters. Further, both edges of the vertical band portion are formed on inclined surfaces which spread downward. Further, a water return band portion having the same height as the vertical band portion is formed between the vertical band portions and in parallel with the vertical band portion.
[0005]
[Action and Effect of the Invention]
According to the present invention, a vertical band portion having a flat surface and the same thickness as the height of the non-slip microprojections is provided. Even if pressure is applied or expansion and contraction occurs due to the temperature difference between day and night, cracks are unlikely to occur at the place where the tucker needle is driven. In addition, since side bands are provided on both the front and back sides, if adjacent sheets are laid so that the side bands are overlapped, no gap is generated in the overlap portion between the sheets. Therefore, it is possible to prevent rainwater from penetrating from the overlapped portion and to prevent a crack from being generated when the tucker needle is driven into the overlapped portion.
And, by arranging the vertical strips at the intervals of the rafters, it becomes a mark indicating the position of the rafters, so that the work of driving nails into the roof tiles and fixing them to the rafters becomes easier.
In addition, by making both edges of the vertical band part downwardly sloped, rainwater flows down the slope from the surface of the vertical band, so it is difficult for rainwater to collect in the vertical band, It is possible to prevent rainwater from entering the back side of the sheet through the needle hole of the hammered tucker needle.
Further, by providing the water return band portion between the vertical band portions, it is possible to prevent rainwater from entering the overlapping portion of the lateral edges of the adjacent sheets.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows a waterproof sheet 10 for a tiled roof according to an embodiment of the present invention. The waterproof sheet 10 is made of a waterproof and durable resin sheet made of synthetic rubber, natural rubber, synthetic resin, or the like. Three vertical band portions 11 are formed on the surface of the waterproof sheet 10 in parallel at regular intervals. A narrow water return band 12 is formed between the vertical band 11 and the vertical band 11 in parallel with the vertical band 11. A rhombus 13 is formed at the lower end of the water return strip 12. A side band 14 extending laterally is formed on the upper edge of the sheet 10. A water return ridge 15 extending laterally is formed slightly on the end side of the intermediate portion of the side band portion 14. The surfaces of the side band 14, the vertical band 11, and the water return band 12 are formed flat. A large number of anti-slip projections 16 are formed on the surface area other than the portion where the side band portion 14, the vertical band portion 11 and the return band portion 12 are formed. On the other hand, the back surface of the waterproof sheet 10 is formed flat.
[0007]
The vertical band portion 11 is formed into an inclined surface 11a having both sides spread downward (see FIG. 3), and the width is set to be larger than the needle width so that the needle does not protrude even when the tucker needle 17 is driven. Further, the interval between the vertical strips 11 is set to be equal to the interval between the rafters 18 on the roof. The size of the rhombus portion 13 is also set so that the tucker needle 17 does not protrude. The thickness of the vertical band portion 11, the water return band portion 12, the rhombus portion 13, and the side band portion 14 is set such that the height is the same as that of the non-slip small projection.
[0008]
The structure of the waterproof sheet for tiled roof 10 according to the present embodiment is as described above, and FIGS. As shown in FIG. 2, the waterproof sheet 10 is laid on the base plate 19 in order from the eaves side to the ridge side. When the eaves sheet 10 is laid, the laying position is adjusted so that the side band portion 14 is located on the ridge side and the vertical band portion 11 is overlapped with the rafter 18. After the sheet 10 at the eaves is laid, the waterproof sheet 10 is fixed to the field board 19 by driving the tucker needle 17 into the vertical band 11 and the rhombus 13. Next, an adjacent sheet 10 is laid. At this time, the edge on the half side band side of the sheet 10 adjacent to the side band 14 of the sheet 10 at the eaves is overlapped, and the vertical band 11 of the sheet 10 at the eaves and the vertical band 11 of the adjacent sheet 10 are aligned. The adjacent sheets 10 are spread as described above and fixed with the tucker needles 17. The tucker needle 17 is also driven into the vertical band portion 11 and the rhombus portion 17 at the overlapping portion of the sheets 10 to fix both sheets 10 to the base plate 19.
[0009]
Next, the tile bars 20 are arranged at predetermined intervals from above the waterproof sheet 10 fixed to the field board 19 with the tucker needle 17 and fixed with the nails 21. As shown in FIG. 3, by driving the nail 21 at the position of the vertical band portion 11, the nail 21 can be driven into the rafter 18 thereunder. Then, as shown in FIG. 4, the claw 22 a of the tile 22 is hooked on the tile bar 20, and the tile 22 is laid.
[0010]
The waterproof sheet 10 for a tiled roof according to the present embodiment is provided with a vertical band portion 11 having a flat surface and the same thickness as the height of the non-slip microprojections 16, so that the sheet 10 is fixed by driving a tucker needle 17 into the vertical band portion 11. If it is thick, cracks are unlikely to occur at the place where the tucker needle 17 is driven even when the foot pressure of the operator is applied or when the tucker needle 17 is expanded or contracted due to the temperature difference between day and night. In addition, since the front and back surfaces are provided with the side band portions 14 which are flat, if the adjacent sheets 10 are laid so that the side band portions 14 are overlapped, the overlapping portion of the sheets 10 is such that the flat side band portions 14 overlap each other. No gaps are formed. In addition, since the water return ridge 15 is provided on the side band portion 14, it is possible to reliably prevent rainwater from entering from the overlapping portion.
[0011]
Since the vertical strips 11 are arranged at the intervals of the rafters 18, they serve as a mark indicating the position of the rafters 18, and can be firmly fixed to the rafters 18 by driving nails 21 into the tile bar 20.
Further, since both edges of the vertical band portion 11 are formed as inclined surfaces 11a which spread downward, rainwater flows down from the surface of the vertical band portion 11 along the inclined surface 11a. Therefore, it is difficult for rainwater to accumulate in the vertical band portion 11, and it is possible to prevent rainwater from entering the back side of the sheet 10 from the needle hole of the tucker needle 17 driven into the vertical band portion 11.
Further, since the water return band portion 12 is provided between the vertical band portions 11 and 11, it is possible to prevent rainwater from entering the overlapped portion of the lateral edges of the adjacent sheets 10.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a waterproof sheet for a tiled roof according to an embodiment of the present invention.
FIG. 2 is a perspective view showing how to use the waterproof sheet.
FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;
FIG. 4 is a partial cross-sectional view showing a tiled roof using a waterproof sheet according to one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Tarpaulin waterproof sheet, 11 ... Vertical band part, 12 ... Water return band part, 13 ... Diamond-shaped part, 14 ... Side band part, 15 ... Water return convex stripe, 16 ... Non-slip small protrusion, 17 ... Tucker needles, 18 rafters, 19 field boards, 20 roof tiles, 21 nails.
