JP2020180435A - Sheet waterproof structure and construction method - Google Patents

Sheet waterproof structure and construction method Download PDF

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JP2020180435A
JP2020180435A JP2019082234A JP2019082234A JP2020180435A JP 2020180435 A JP2020180435 A JP 2020180435A JP 2019082234 A JP2019082234 A JP 2019082234A JP 2019082234 A JP2019082234 A JP 2019082234A JP 2020180435 A JP2020180435 A JP 2020180435A
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base plate
joint
covering material
sheet
waterproof structure
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麻衣子 高橋
Maiko Takahashi
麻衣子 高橋
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Lonseal Corp
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Lonseal Corp
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Abstract

To provide a sheet waterproof structure maintaining fireproof performance while being light in weight and maintaining high waterproofness in a waterproof structure of a roof having a small inclination angle, and a construction method therefor.SOLUTION: A sheet waterproof structure is provided with: a plurality of backing plates 4 fixed on a support member 1 forming a roof; a joint covering material 5 formed of an incombustible material and joined to the backing plate 4 by covering a backing plate joint part A on the upper side of the backing plate joint part A which is a joint formed by butting adjacent backing plates 4; a waterproof sheet 6 laid and fixed over the backing plate 4 and the joint covering material 5.SELECTED DRAWING: Figure 1

Description

本発明は、屋上や屋根、ベランダ等に防水シートを用いた防水構造、施工方法に関する。 The present invention relates to a waterproof structure and a construction method using a tarpaulin on a rooftop, a roof, a veranda, and the like.

従来、Ｓ造の屋根構造には、断熱材や野地板を母屋に固定し、瓦や金属板などの葺材を重ねた斜屋根の構造がある。これらの構造は葺材が不燃材料であるため、高い防火性能を保持している。屋根の最表面に瓦や金属板などの不燃材で構成される場合は、火災時に野地板の目地部の開きや炎の吹上等については考慮する必要はない。 Conventionally, the S-structured roof structure includes a slanted roof structure in which a heat insulating material or a field board is fixed to the main building and a roofing material such as a roof tile or a metal plate is piled up. Since the roofing material is a non-combustible material, these structures maintain high fire protection performance. If the outermost surface of the roof is made of non-combustible material such as roof tiles or metal plates, it is not necessary to consider the opening of the joints of the field plates and the blowing of flames in the event of a fire.

このように屋根の最表面が瓦や金属板などの不燃材で構成される場合、防水性を確保するために屋根には傾斜が設けられている。瓦で４／１０以上、スレート板で３／１０以上、金属板で１／１０以上の傾斜が一般に設けられている。 When the outermost surface of the roof is made of a non-combustible material such as a roof tile or a metal plate, the roof is inclined to ensure waterproofness. Generally, a roof tile has an inclination of 4/10 or more, a slate plate has an inclination of 3/10 or more, and a metal plate has an inclination of 1/10 or more.

また、葺材として粘土瓦が用いられる場合、粘土瓦は重量が重く躯体への負荷が大きくなるとの問題がある。そこで、葺材として軽量な樹脂系屋根材を用いることが提案されている。特許文献１では、屋根の下地上に野地板を固定し、この野地板上に下葺き材を葺いたうえで、下葺き材上に樹脂系屋根材が順次葺かれてなる樹脂系屋根構造であって、樹脂系屋根材は、ガラス繊維混入不飽和ポリエステル系樹脂波板で形成され、このように下地、野地板、下葺き材、樹脂系屋根材を特定することによって、屋根上に葺かれた樹脂系屋根構造の防火性を向上させることができ、建築基準法における耐火試験にも適合可能な樹脂系屋根構造を達成できることが開示されている。 Further, when a clay roof tile is used as a roofing material, there is a problem that the clay roof tile is heavy and the load on the skeleton is large. Therefore, it has been proposed to use a lightweight resin-based roofing material as the roofing material. In Patent Document 1, a field board is fixed on the ground under the roof, an underlaying material is laid on the field board, and then a resin-based roofing material is sequentially laid on the under-roofing material. Therefore, the resin-based roofing material is formed of an unsaturated polyester-based resin corrugated sheet mixed with glass fibers, and is roofed on the roof by specifying the base, the field plate, the underlaying material, and the resin-based roofing material in this way. It is disclosed that the fire resistance of the resin roof structure can be improved and the resin roof structure that can meet the fire resistance test under the Building Standards Law can be achieved.

特開２００７−３９９０４号公報JP-A-2007-39904

しかし、以上のような従来技術における葺材を用いた構造は、重量が重く躯体に負荷がかかり、さらに水密性に劣るため傾斜を設けた斜屋根でなければ防水性能が確保できないという課題があった。そこで、瓦や金属板などの葺材を重ねた斜屋根に対し、最表面を防水シートで施工することで軽量で高い防水性を保持する方法がある。一方、防水シートは一般的に可燃物であるため、防火性能を確保することが求められる。 However, the above-mentioned structure using the roofing material in the prior art has a problem that the waterproof performance cannot be ensured unless the roof is sloped because the weight is heavy and the skeleton is loaded and the watertightness is poor. .. Therefore, there is a method of maintaining a lightweight and highly waterproof property by constructing the outermost surface with a tarpaulin on a slanted roof on which roof tiles, metal plates, and other roofing materials are stacked. On the other hand, since the waterproof sheet is generally a combustible material, it is required to secure fireproof performance.

すなわち本発明においては、傾斜角の小さい屋根における防水構造において、軽量で高い防水性を保持しつつ防火性能を保持するシート防水構造およびその施工方法を提供することを目的とする。 That is, an object of the present invention is to provide a sheet waterproof structure and a construction method thereof that maintain fireproof performance while maintaining light weight and high waterproofness in a waterproof structure for a roof having a small inclination angle.

そこで本発明においては、屋根を形成する支持部材の上に固定される複数の下地板と、隣り合う下地板を突き付けて形成された目地である下地板目地部の上側に、下地板目地部を覆って下地板に接合され、不燃材料で構成された目地被覆材と、下地板と目地被覆材の上に敷設固定された防水シートとを備える、シート防水構造とすることができる。また、下地板が支持部材側に配置された断熱材と断熱材と積層された野地板からなり、野地板側に防水シートが固定されているシート防水構造としてもよいし、目地被覆材を帯状としてもよい。さらに目地被覆材が下地板目地部の上側表面を覆う水平片と平面片から下側に向けて凸状に設けられた凸状片とを有し、凸状片が下地板目地部を構成する隣り合う下地板の間に挿入されているシート防水構造としてもよいし、下地板目地部が複数の支持部材の間に設けられていてもよい。
また、別の形態として目地被覆材と下地板との層間に充填された不燃充填材をさらに備えるシート防水構造とすることも好ましい。防水シートについては、熱可塑性樹脂層とガラス不織布層とを有し、ガラス不織布層の上下面に熱可塑性樹脂層が積層されていることも好ましい。防水シートと下地板との接合は防水シートが下地板に接着剤で接着されていてもよい。
施工方法として、屋根を形成する支持部材の上に複数の下地板を敷設し、複数の下地板を突き付けて下地板目地部を形成し、下地板を支持部材に固定する工程と、下地板目地部の上側を不燃材料で構成された目地被覆材で覆う工程と、下地板と目地被覆材の上に防水シートを敷設固定する工程とを備える、シート防水構造の施工方法とすることができる。 Therefore, in the present invention, a base plate joint is provided on the upper side of a base plate joint which is a joint formed by abutting a plurality of base plates fixed on a support member forming a roof and adjacent base plates. It is possible to form a sheet waterproof structure including a joint covering material which is covered and joined to a base plate and is made of a non-combustible material, and a waterproof sheet which is laid and fixed on the base plate and the joint covering material. Further, the base plate may be a sheet waterproof structure in which the base plate is composed of a heat insulating material arranged on the support member side and a field plate laminated with the heat insulating material, and the waterproof sheet is fixed on the field plate side, or the joint covering material is strip-shaped. May be. Further, the joint covering material has a horizontal piece covering the upper surface of the base plate joint portion and a convex piece provided in a convex shape downward from the flat piece, and the convex piece constitutes the base plate joint portion. It may be a sheet waterproof structure inserted between adjacent base plates, or a base plate joint portion may be provided between a plurality of support members.
Further, as another form, it is also preferable to have a sheet waterproof structure further including a non-combustible filler filled between the joint covering material and the base plate. It is also preferable that the waterproof sheet has a thermoplastic resin layer and a glass non-woven fabric layer, and the thermoplastic resin layer is laminated on the upper and lower surfaces of the glass non-woven fabric layer. For joining the waterproof sheet and the base plate, the waterproof sheet may be adhered to the base plate with an adhesive.
As a construction method, a process of laying a plurality of base plates on a support member forming a roof, abutting a plurality of base plates to form a base plate joint, and fixing the base plate to the support member, and a base plate joint. It is possible to construct a sheet waterproof structure including a step of covering the upper side of the portion with a joint covering material made of a non-combustible material and a step of laying and fixing a waterproof sheet on the base plate and the joint covering material.

防水シートを用いることで軽量性と高い防水性を保持し、傾斜角度の小さい屋根にも用いることができ、さらに防火性能を保持するシート防水構造およびその施工方法を得ることができる。 By using a waterproof sheet, it is possible to obtain a sheet waterproof structure that maintains lightness and high waterproofness, can be used for a roof with a small inclination angle, and further maintains fireproof performance, and a construction method thereof.

本発明の一実施形態の防水構造の部分断面図である。It is a partial sectional view of the waterproof structure of one Embodiment of this invention. 本発明の一実施形態の防水構造の部分断面図である。It is a partial sectional view of the waterproof structure of one Embodiment of this invention. 本発明の一実施形態の防水構造の部分断面図である。It is a partial sectional view of the waterproof structure of one Embodiment of this invention. 本発明の一実施形態の防水構造の部分断面図である。It is a partial sectional view of the waterproof structure of one Embodiment of this invention. 目地被覆材の変形例を示した部分的な斜視図である。It is a partial perspective view which showed the modification of the joint covering material. 本発明の一実施形態の防水構造の斜視図である。部材の一部を切断し内部の構造を示している。It is a perspective view of the waterproof structure of one Embodiment of this invention. A part of the member is cut to show the internal structure.

以下、本発明の実施形態について図面を用いて説明する。
図１を用いて本発明の第１実施形態について説明する。屋根を構成する支持部材１の上に２枚の下地板４が固定され、隣り合う下地板４は突き付けて配置され、目地である下地板目地部Ａの上側に目地被覆材５が配置固定され、下地板４と目地被覆材５との上に防水シート６が敷設され固定されている。目地被覆材５は不燃材料で構成されている。
このように防水シートを用いることで軽量性と高い防水性を保持し、傾斜角度の小さい屋根にも用いることができ、さらに防火性能を保持するシート防水構造およびその施工方法を得ることができる。本実施形態では、シート防水構造とすることで陸屋根とすることができ、屋根の傾斜は傾斜角を０°とすることも可能である。また、傾斜角を０°〜３０°程度としてもよい。より傾斜を少なくする場合、１／５０以上することが好ましく、排水性をより向上させる場合は１／２０以上とすることが好ましい。このように傾斜角を小さくすることで施工性が向上し、床面積の大きな構築物を構築しやすくなるとの利点がある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The first embodiment of the present invention will be described with reference to FIG. Two base plates 4 are fixed on the support member 1 constituting the roof, the adjacent base plates 4 are abutted and arranged, and the joint covering material 5 is arranged and fixed on the upper side of the joint base plate joint portion A which is a joint. A waterproof sheet 6 is laid and fixed on the base plate 4 and the joint covering material 5. The joint covering material 5 is made of a non-combustible material.
By using the waterproof sheet in this way, it is possible to obtain a sheet waterproof structure that maintains lightness and high waterproofness, can be used for a roof having a small inclination angle, and further maintains fireproof performance, and a construction method thereof. In the present embodiment, a flat roof can be formed by using a sheet waterproof structure, and the inclination of the roof can be set to 0 °. Further, the inclination angle may be about 0 ° to 30 °. When the inclination is further reduced, it is preferably 1/50 or more, and when the drainage property is further improved, it is preferably 1/20 or more. By reducing the inclination angle in this way, there is an advantage that workability is improved and it becomes easy to construct a structure having a large floor area.

第１実施形態についてより具体的には鉄骨で構成された支持部材１の上に下地板４が配置され、下地板４は支持部材１にビス（図示なし）によって固定されている。下地板４は野地板２と断熱材３とで構成され、野地板２が上側に断熱材３が下側に向けて配置されている。なお、下側が支持部材１の側となる。そして、下地板４が付き合わされた目地である下地板目地部Ａの上には不燃材料で構成されたテープである目地被覆材５が配置されテープの粘着層によって固定されている。目地被覆材５ａと下地板４の野地板２上を覆って防水シート６が下地板４に接着剤で固定されている。 More specifically, regarding the first embodiment, the base plate 4 is arranged on the support member 1 made of a steel frame, and the base plate 4 is fixed to the support member 1 by screws (not shown). The base plate 4 is composed of a field plate 2 and a heat insulating material 3, and the field plate 2 is arranged on the upper side and the heat insulating material 3 is arranged on the lower side. The lower side is the side of the support member 1. Then, a joint covering material 5 which is a tape made of a non-combustible material is arranged on the joint portion A of the base plate which is a joint to which the base plate 4 is attached, and is fixed by an adhesive layer of the tape. The waterproof sheet 6 is fixed to the base plate 4 with an adhesive so as to cover the joint covering material 5a and the field plate 2 of the base plate 4.

図６には実施形態の斜視図を示している。支持部材１に上に複数枚の下地板４が敷設され、下地板目地部Ａの上には目地被覆材５が配置し固定されている。そして、下地板４と目地被覆材５の上に防水シート６が敷設され接着剤で固定されている。ここで、支持部材１と略垂直方向の下地板目地部Ａは目地被覆材５で覆われているが、支持部材１の上に設けられた下地板目地部Ｂは目地被覆材５は配置されていない。目地被覆材５は下地板目地部のすべてを覆うことが好ましいが、下側からの炎に対し、支持部材１があることで防火性を有する場合には支持部材１の上に設けられた下地板目地部Ｂには目地被覆材５を配置しなくてもよい。
なお、図６において下地板目地部Ａの位置を明確に示すために目地被覆材５の一部が切断して描かれている。また、図１から図４は図６のＡ‘Ａ’に相当する位置での断面図であるが、図１から図４と図６とは構成する部材に異なる部分があるため図１から図４は図６のＡ‘Ａ’断面図と同一とならない場合がある。図１から図４の支持部材１、下地板４、下地板目地部Ａと目地被覆材５との位置関係が図６のＡ‘Ａ’ に相当する位置で示されている。 FIG. 6 shows a perspective view of the embodiment. A plurality of base plates 4 are laid on the support member 1, and a joint covering material 5 is arranged and fixed on the base plate joint portion A. Then, the waterproof sheet 6 is laid on the base plate 4 and the joint covering material 5 and fixed with an adhesive. Here, the base plate joint portion A substantially perpendicular to the support member 1 is covered with the joint covering material 5, but the joint covering material 5 is arranged on the base plate joint portion B provided on the support member 1. Not. It is preferable that the joint covering material 5 covers the entire joint portion of the base plate, but if the support member 1 is provided to have fire resistance against flames from the lower side, the joint covering material 5 is provided on the support member 1. It is not necessary to arrange the joint covering material 5 in the joint portion B of the main plate.
In FIG. 6, a part of the joint covering material 5 is cut and drawn in order to clearly show the position of the base plate joint portion A. Further, FIGS. 1 to 4 are cross-sectional views at positions corresponding to A'A'of FIG. 6, but FIGS. 1 to 4 and 6 are different from each other in the constituent members. 4 may not be the same as the A'A'cross-sectional view of FIG. The positional relationship between the support member 1, the base plate 4, the base plate joint portion A and the joint covering material 5 of FIGS. 1 to 4 is shown at a position corresponding to A'A'in FIG.

第２実施形態として図３を用いて説明する。第２実施形態は目地被覆材５として鋼板を用いている。支持部材１の上に下地板４が配置され、下地板４は支持部材１にビス（図示なし）によって固定されている。下地板４は野地板２と断熱材３とで構成され、野地板２が上側に断熱材３が下側に向けて配置されている。そして、下地板４が付き合わされた目地である下地板目地部Ａの上には鋼板を折り曲げて形成された帯状の目地被覆材５ｅが配置され、目地被覆材５ｅの両端縁部にビス８が打ち込まれ固定されている。目地被覆材５ｅと下地板４の上を覆って防水シート６が下地板４に接着剤で固定されている。 The second embodiment will be described with reference to FIG. In the second embodiment, a steel plate is used as the joint covering material 5. The base plate 4 is arranged on the support member 1, and the base plate 4 is fixed to the support member 1 by screws (not shown). The base plate 4 is composed of a field plate 2 and a heat insulating material 3, and the field plate 2 is arranged on the upper side and the heat insulating material 3 is arranged on the lower side. Then, a strip-shaped joint covering material 5e formed by bending a steel plate is arranged on the base plate joint portion A, which is the joint to which the base plate 4 is attached, and screws 8 are placed on both end edges of the joint covering material 5e. It is driven in and fixed. The waterproof sheet 6 is fixed to the base plate 4 with an adhesive so as to cover the joint covering material 5e and the base plate 4.

第１および第２実施形態において下地板４は野地板２と断熱材３で構成されているが、下地板４は野地板２でのみで構成されていてもよい。下地板４は火災時に下側からの炎に対し、屋根部分を保持し屋根から炎が吹き出したりするのを防ぐために防火性を有しており、かつ下地板４の上に設けられる防水シート６を敷設固定するための下地平面として機能すればよい。そのため下地板４は平面を有する板状であって炎に対し対抗できる防火性を有した構成とする必要がある。したがって、下地板４を構成する野地板２が平面を有する板状であって炎に対し対抗できる防火性を有した構成とする必要がある。
また、断熱材３を有することで断熱性が向上するため好ましい。また、野地板２と断熱材３とを有する場合は、野地板２と断熱材３とが接合されていることが好ましく、野地板２と断熱材３とが施工前に予め接合されていることがより好ましい。野地板２と断熱材３とが接合されていることで施工時の工数が削減される。 In the first and second embodiments, the base plate 4 is composed of the field plate 2 and the heat insulating material 3, but the base plate 4 may be composed of only the field plate 2. The base plate 4 has a fireproof property to hold the roof portion and prevent the flame from blowing out from the roof against the flame from the lower side in the event of a fire, and the tarpaulin 6 provided on the base plate 4 It suffices to function as a base plane for laying and fixing. Therefore, the base plate 4 needs to have a flat plate shape and a fireproof structure capable of countering flames. Therefore, it is necessary that the field plate 2 constituting the base plate 4 has a flat plate shape and has a fireproof property capable of countering flames.
Further, it is preferable to have the heat insulating material 3 because the heat insulating property is improved. Further, when the field board 2 and the heat insulating material 3 are provided, it is preferable that the field board 2 and the heat insulating material 3 are joined to each other, and the field board 2 and the heat insulating material 3 are joined in advance before construction. Is more preferable. Since the field board 2 and the heat insulating material 3 are joined, the man-hours at the time of construction are reduced.

下地板４を構成する野地板２は、合板、OSB（Oriented StrandBord）、パーティクルボード等の木質系ボードや、木毛セメント板、硬質木毛セメント板、木毛板、木片セメント板、硬質木片セメント板等の木質系セメント板や、セメント板、スレート板、ケイカル板等の無機材料を固めた無機質板や、ガラス繊維混入樹脂板等を用いることができる。断熱材３は、硬質ウレタンフォーム、ポリスチレンフォーム、ポリエチレンフォーム、フェノールフォーム等、一般的に防水構造に使用されている断熱材を使用できる。また、グラスウールなどの無機系断熱材を使用できる。 The field board 2 constituting the base board 4 is a wood-based board such as plywood, OSB (Oriented StrandBord), particle board, wood wool cement board, hard wood wool cement board, wood wool board, wood piece cement board, hard wood piece cement. Wood-based cement boards such as boards, inorganic boards obtained by solidifying inorganic materials such as cement boards, slate boards, and caucal boards, and resin boards mixed with glass fibers can be used. As the heat insulating material 3, a heat insulating material generally used for a waterproof structure such as rigid urethane foam, polystyrene foam, polyethylene foam, and phenol foam can be used. Inorganic heat insulating materials such as glass wool can also be used.

下地板４は支持部材１の上に配置され、支持部材１にビス等（図示なし）で固定されている。また、支持部材１の上に配置された複数の下地板４は隣り合う下地板４が突き付けて配置されている。このように隣り合う下地板４が突き付けられることで目地である下地板目地部Ａが形成される。また、図６の様に下地板目地部Ａは通常、板状の下地板４を複数配置することで形成されるので、屋根の外側から平面視すると、下地板目地部Ａは格子状に形成されることが多い。この下地板目地部Ａが支持部材１の間に設けられている。 The base plate 4 is arranged on the support member 1 and is fixed to the support member 1 with screws or the like (not shown). Further, the plurality of base plates 4 arranged on the support member 1 are arranged so that adjacent base plates 4 abut against each other. By abutting the adjacent base plates 4 in this way, the base plate joint portion A, which is a joint, is formed. Further, as shown in FIG. 6, the base plate joint portion A is usually formed by arranging a plurality of plate-shaped base plates 4, so that the base plate joint portion A is formed in a grid pattern when viewed in a plan view from the outside of the roof. Often done. The base plate joint portion A is provided between the support members 1.

第１、第２実施形態において下地板目地部Ａの上側である野地板２の上に目地被覆材５が配置されている。目地被覆材５は下地板４の下側からの炎によって下地板目地部Ａの隙間から炎が吹き出したり下地板４が炎・熱により変形し、下地板目地部Ａから炎が吹き出すのを防げればよい。
したがって、目地被覆材５は不燃材料であることが求められる。ここで不燃材料は炎や熱に対し耐久性を有する材料であり、建築基準法等で定められる不燃材料に限定されない。目地被覆材５として用いられる不燃材料としては、ステンレス等の金属製の鋼板、ガラス繊維シート、ガラス繊維織物等の無機質材を用いることができ、無機質材に有機質材を組み合わせてもよい。例えば、鋼板に熱可塑性樹脂被覆層を有する樹脂被覆鋼板、塗料被覆鋼板、薄膜アルミニウムに粘着層を設けたアルミテープ等を用いることができる。ここで、防水シート６をポリ塩化ビニル樹脂系防水シートとした場合、鋼板をポリ塩化ビニル樹脂系層で積層された塩ビ鋼板を用いることができる。さらに鋼板についてより具体的には、以下のように例示できる。一般構造用圧延鋼材(JIS G 3101)、高耐候性圧延鋼板(JIS G 3125)、冷間圧延鋼板及び鋼帯(JIS G 3141)、溶融亜鉛めっき鋼帯(JIS G 3302)、ぶりき及びぶりき原板(JIS G 3303)、電気亜鉛めっき鋼板及び鋼帯(JIS G 3313)、溶融アルミニウムめっき鋼板及び鋼帯(JIS G 3314)、ティンフリースチール(JIS G 3315)、溶融亜鉛-5%アルミニウム合金めっき鋼板(JIS G 3317)、溶融55%アルミニウム-亜鉛合金めっき鋼板及び鋼帯(JIS G 3321)、融亜鉛-アルミニウム-マグネシウム合金めっき鋼板及び鋼帯(JIS G 3323)、熱間圧延ステンレス鋼板及び鋼帯(JIS G 4304)、冷間圧延ステンレス鋼板及び鋼帯(JIS G 4305)、ポリ塩化ビニル被覆金属板(JIS K 6744)、ポリ塩化ビニル被覆鋼板(SG準拠品)、ポリ塩化ビニル片面被覆ステンレス鋼板(SUS430)。 In the first and second embodiments, the joint covering material 5 is arranged on the field plate 2 which is the upper side of the base plate joint portion A. The joint covering material 5 can prevent the flame from blowing out from the gap of the base plate joint A due to the flame from the lower side of the base plate 4 or the base plate 4 being deformed by the flame / heat and the flame from blowing out from the base plate joint A. Just do it.
Therefore, the joint covering material 5 is required to be a non-combustible material. Here, the non-combustible material is a material having durability against flame and heat, and is not limited to the non-combustible material specified by the Building Standards Act and the like. As the non-combustible material used as the joint covering material 5, an inorganic material such as a metal steel plate such as stainless steel, a glass fiber sheet, or a glass fiber woven fabric can be used, and an organic material may be combined with the inorganic material. For example, a resin-coated steel sheet having a thermoplastic resin-coated layer on the steel sheet, a paint-coated steel sheet, an aluminum tape having an adhesive layer on thin-film aluminum, or the like can be used. Here, when the waterproof sheet 6 is a polyvinyl chloride resin-based waterproof sheet, a vinyl chloride steel plate in which the steel plate is laminated with a polyvinyl chloride resin-based layer can be used. More specifically, the steel sheet can be exemplified as follows. Rolled steel for general structure (JIS G 3101), high weather resistant rolled steel (JIS G 3125), cold rolled steel and strip (JIS G 3141), hot-dip zinc-plated steel strip (JIS G 3302), fluff and burr Original plate (JIS G 3303), electrozinc plated steel sheet and steel strip (JIS G 3313), molten aluminum plated steel sheet and steel strip (JIS G 3314), tin-free steel (JIS G 3315), molten zinc-5% aluminum alloy Plated steel sheet (JIS G 3317), molten 55% aluminum-zinc alloy plated steel sheet and steel strip (JIS G 3321), molten zinc-aluminum-magnesium alloy plated steel sheet and steel strip (JIS G 3323), hot rolled stainless steel sheet and Steel strip (JIS G 4304), cold-rolled stainless steel sheet and steel strip (JIS G 4305), polyvinyl chloride-coated metal plate (JIS K 6744), polyvinyl chloride-coated steel sheet (SG compliant product), polyvinyl chloride single-sided coating Stainless steel plate (SUS430).

目地被覆材５は、図６に示すように一方向に長く形成された下地板目地部Ａを覆うため、細長い帯状であることが好ましく、目地被覆材５の幅に対しもう一方の辺が幅よりも長く形成されていることが好ましい。また、目地被覆材５の幅は下地板目地部Ａを充分に覆う長さであることが好ましい。目地被覆材５は下地板４に接着剤等により接着されてもよいしビス等で固定されていてもよい。 As shown in FIG. 6, the joint covering material 5 covers the base plate joint portion A formed long in one direction, and therefore preferably has an elongated strip shape, and the width of the other side is the width of the width of the joint covering material 5. It is preferably formed longer than. Further, the width of the joint covering material 5 is preferably a length that sufficiently covers the joint portion A of the base plate. The joint covering material 5 may be adhered to the base plate 4 with an adhesive or the like, or may be fixed with screws or the like.

ここで、図５に目地被覆材５の変形例を示す。図５の目地被覆材５ａのように平板状であってもよい。平板状の目地被覆材５ａとしてはテープや帯状の鋼板を用いることができる。テープである場合、テープとして粘着層を設けることで接着剤を施工時に塗布することなくテープを下地板４に固定することができる。帯状の鋼板を用いた目地被覆材５の場合は、接着剤で下地板４に固定してもよいし、ビスを用いて固定してもよい。 Here, FIG. 5 shows a modified example of the joint covering material 5. It may be flat like the joint covering material 5a in FIG. As the flat joint covering material 5a, a tape or a strip-shaped steel plate can be used. In the case of a tape, by providing an adhesive layer as the tape, the tape can be fixed to the base plate 4 without applying an adhesive at the time of construction. In the case of the joint covering material 5 using a strip-shaped steel plate, it may be fixed to the base plate 4 with an adhesive or may be fixed with screws.

主に目地被覆材５が鋼板で構成されている場合、目地被覆材５ｃのように鋼板の端縁部を折り曲げて折り曲げ部５３を形成し、鋼板の剛性を増し施工前や施工時の変形が低減され好ましい。 When the joint covering material 5 is mainly composed of a steel plate, the edge portion of the steel plate is bent to form the bent portion 53 as in the joint covering material 5c, and the rigidity of the steel plate is increased to cause deformation before or during construction. Reduced and preferred.

図５に示した目地被覆材５ｅは水平片５１と固定片５４とを有し、水平片５１の両端部から下側に伸びた脚部５５を有し、水平片５１と略平行にかつ、水平片５１の両端部から外側に向けて広がった脚部５５に固定片５４が接続されている。固定片５４は下地板４に目地被覆材５を固定するために設けられており、図５に示した目地被覆材５ｅの場合、固定片５４にはビスを通すビス孔５６が設けられている。水平片５１は下地板目地部Ａを覆う部分である。図３において、目地被覆材５ｅは水平片５１が下地板目地部Ａを覆い、水平片５１から外側に向けて脚部５５によって接続された固定片５４が水平片５１から外側に向かって広がって設けられ、固定片５４は下地板４の上に配置され、固定片５４に設けられたビス孔５６にビス８が下地板４に打ち込まれ目地被覆材５ｅが下地板４に固定されている。目地被覆材５ｅは鋼板を折り曲げて水平片５１、脚部５５、固定片５５を形成することができる。 The joint covering material 5e shown in FIG. 5 has a horizontal piece 51 and a fixed piece 54, has leg portions 55 extending downward from both ends of the horizontal piece 51, and is substantially parallel to the horizontal piece 51 and. The fixing piece 54 is connected to the leg portion 55 extending outward from both ends of the horizontal piece 51. The fixing piece 54 is provided to fix the joint covering material 5 to the base plate 4, and in the case of the joint covering material 5e shown in FIG. 5, the fixing piece 54 is provided with a screw hole 56 through which a screw is passed. .. The horizontal piece 51 is a portion that covers the base plate joint portion A. In FIG. 3, in the joint covering material 5e, the horizontal piece 51 covers the base plate joint portion A, and the fixed piece 54 connected by the leg portion 55 outward from the horizontal piece 51 spreads outward from the horizontal piece 51. The fixing piece 54 is provided and is arranged on the base plate 4, and the screw 8 is driven into the base plate 4 into the screw hole 56 provided in the fixing piece 54, and the joint covering material 5e is fixed to the base plate 4. The joint covering material 5e can form a horizontal piece 51, a leg portion 55, and a fixed piece 55 by bending a steel plate.

この様に目地被覆材５ｅをビス８で固定する場合、ビス８は下地板目地部Ａの近傍から離して下地板４に打ち込むことが好ましく、図３のように下地板目地部Ａを挟んで両側にビス８を打ち込むことが好ましい。下地板目地部Ａは下からの炎に対し弱い部分であり、下地板４が変形し下地板目地部Ａが開いた場合には目地被覆材５が浮いたり脱離したりすることが懸念され、ビス８を下地板目地部Ａから離れた部分に下地板目地部Ａを挟んで打ち込むことでこのような懸念を低減することができる。
また、目地被覆材５として一定の厚みを設けることが好ましい。この様に目地被覆材５に厚みを設けることで、目地被覆材５をビス８で固定する場合のビス８で打ち込む際の座繰りを形成しやすくなる。目地被覆材５ｃ、５ｅのように一定の厚みを設ける手段としては目地被覆材５を構成する材料の厚みを厚くしたり、折り曲げたりして目地被覆材５に厚みをもたせる方法が例示できる。 When the joint covering material 5e is fixed with the screw 8 in this way, it is preferable that the screw 8 is driven into the base plate 4 away from the vicinity of the base plate joint portion A, and the base plate joint portion A is sandwiched as shown in FIG. It is preferable to drive screws 8 on both sides. The base plate joint portion A is a portion that is vulnerable to flames from below, and if the base plate 4 is deformed and the base plate joint portion A is opened, there is a concern that the joint covering material 5 may float or come off. Such a concern can be reduced by driving the screw 8 into a portion away from the base plate joint portion A with the base plate joint portion A sandwiched between them.
Further, it is preferable to provide a constant thickness as the joint covering material 5. By providing the joint covering material 5 with a thickness in this way, it becomes easy to form a counterbore when the joint covering material 5 is driven by the screw 8 when the joint covering material 5 is fixed by the screw 8. As a means for providing a constant thickness such as the joint covering material 5c and 5e, a method of increasing the thickness of the material constituting the joint covering material 5 or bending the joint covering material 5 to give the joint covering material 5 a thickness can be exemplified.

また図５の目地被覆材５ｂ、５ｄのように水平片５１と凸状片５２で構成され断面において略Ｔ字形としてもよい。目地被覆材５ｂは水平片５１から下側に向けて凸状片５２が設けられている。目地被覆材５ｄは、１枚の鋼板を折り曲げて凸状片５２が鋼板を二重にして形成されている。
水平片５１は下地板目地部Ａの下地板４の上面に配置され下地板目地部Ａの上面を覆い、凸状片５２は下地板目地部Ａの下側に向けて隣り合う下地板４の間に挿入されている。ここで下地板４は下からの炎により加熱され変形し下地板目地部Ａが広がるおそれがあり、凸状片５２を有することで下地板目地部Ａから目地被覆材５が脱離しにくくなり下地板目地部Ａからの炎の噴出をより防止することができるため好ましい。 Further, as in the joint covering materials 5b and 5d of FIG. 5, the horizontal piece 51 and the convex piece 52 may be formed and the cross section may be substantially T-shaped. The joint covering material 5b is provided with a convex piece 52 extending downward from the horizontal piece 51. The joint covering material 5d is formed by bending one steel plate and forming a convex piece 52 in which the steel plates are doubled.
The horizontal piece 51 is arranged on the upper surface of the base plate 4 of the base plate joint portion A and covers the upper surface of the base plate joint portion A, and the convex piece 52 is an adjacent base plate 4 toward the lower side of the base plate joint portion A. It is inserted in between. Here, the base plate 4 may be heated and deformed by a flame from below and the base plate joint portion A may spread, and having the convex piece 52 makes it difficult for the joint covering material 5 to separate from the base plate joint portion A. It is preferable because it is possible to further prevent the ejection of flame from the joint portion A of the main plate.

また、目地被覆材５ｄは凸状片５２が鋼板を二重にして形成されているため、火災時に熱や炎によって下地板４が収縮し下地板目地部Ａが広がる場合に、目地被覆材５が図３のようにビスで両端縁部が固定されていると、その収縮に合わせて二重となった凸状片５２が伸びて下地板目地部Ａが上側から見て露出するのを防ぎ、広がった下地板目地部Ａから炎が噴き出すことを防止することができる。 Further, since the joint covering material 5d is formed by double-layering the steel plate with the convex pieces 52, when the base plate 4 shrinks due to heat or flame and the base plate joint portion A expands in the event of a fire, the joint covering material 5 However, when both end edges are fixed with screws as shown in FIG. 3, the double convex pieces 52 extend in accordance with the contraction to prevent the base plate joint A from being exposed when viewed from above. , It is possible to prevent the flame from being ejected from the widened base plate joint portion A.

実施形態の変形例として、図２、図３のように目地被覆材５と下地板４との間に不燃充填材７を充填させもよい。不燃充填材７は不燃材料で構成されていればよい。ここで不燃材料は炎に対し耐久性を有する材料であり、建築基準法等で定められる不燃材料に限定されない。不燃充填材７は下地板目地部Ａの隙間から炎が吹き上がるのをより効果的に防止するために目地被覆材５と下地板４との間に充填される材料であって、目地被覆材５と下地板４とに密着されることが好ましく、不燃材料であって柔軟性や追従性を有することが好ましい。不燃充填材７はガラス繊維、金属繊維、炭素繊維等の無機質繊維や変性シリコーン樹脂系やポリウレタン樹脂系、シリコーン等の難燃シーリング材を用いることができる。
図２や図３のように目地被覆材５を折り曲げた鋼板で構成した目地被覆材５ｅとした場合、目地被覆材５ｅと下地板４とで形成された隙間に不燃充填材７を充填させることができる。目地被覆材５ｅと下地板４とで形成された隙間に不燃充填材７を充填させ隙間を完全にふさぐことが好ましいが、図２や図３のように一部隙間が存在していてもよい。 As a modification of the embodiment, the non-combustible filler 7 may be filled between the joint covering material 5 and the base plate 4 as shown in FIGS. 2 and 3. The non-combustible filler 7 may be made of a non-combustible material. Here, the non-combustible material is a material having durability against flames, and is not limited to the non-combustible material specified by the Building Standards Act and the like. The non-combustible filler 7 is a material that is filled between the joint covering material 5 and the base plate 4 in order to more effectively prevent the flame from blowing up from the gap of the base plate joint portion A, and is a joint covering material. It is preferable that the 5 and the base plate 4 are in close contact with each other, and it is preferable that the material is a non-combustible material and has flexibility and followability. As the non-combustible filler 7, inorganic fibers such as glass fiber, metal fiber and carbon fiber, and flame-retardant sealing materials such as modified silicone resin-based, polyurethane resin-based and silicone can be used.
When the joint covering material 5 is made of a bent steel plate as shown in FIGS. 2 and 3, the gap formed by the joint covering material 5e and the base plate 4 is filled with the noncombustible filler 7. Can be done. It is preferable that the gap formed by the joint covering material 5e and the base plate 4 is filled with the non-combustible filler 7 to completely close the gap, but a partial gap may be present as shown in FIGS. 2 and 3. ..

また、目地被覆材５は複数の材を組み合わせて用いてもよい。図示しないが、下地板目地部Ａを覆い下地板４の上に１つ目の第１目地被覆材を固定し、第１目地被覆材の上から２つ目の第２目地被覆材を配置固定してもよい。例えば、第１目地被覆材としてアルミテープを下地板４の上に貼り付け、その上から第２目地被覆材として鋼板を被せ固定してもよい。逆に、第１目地被覆材として鋼板を下地板４の上に配置固定し、その上から第２目地被覆材としてアルミテープを覆うように貼り付けてもよい。また、第１目地被覆材、第２目地被覆材の上から第３目地被覆材を被せてもよい。さらに、不燃充填材７を第１目地被覆材と下地板４との間に充填してもよいし、不燃充填材７と同種の材料を複数の目地被覆材の間に充填してもよい。 Further, the joint covering material 5 may be used in combination of a plurality of materials. Although not shown, the first joint covering material is fixed on the base plate 4 by covering the base plate joint portion A, and the second second joint covering material from the top of the first joint covering material is arranged and fixed. You may. For example, an aluminum tape may be attached on the base plate 4 as the first joint covering material, and a steel plate may be covered and fixed as the second joint covering material from above. On the contrary, a steel plate may be arranged and fixed on the base plate 4 as the first joint covering material, and may be attached so as to cover the aluminum tape as the second joint covering material from above. Further, the third joint covering material may be covered on the first joint covering material and the second joint covering material. Further, the non-combustible filler 7 may be filled between the first joint covering material and the base plate 4, or the same kind of material as the non-combustible filler 7 may be filled between the plurality of joint covering materials.

目地被覆材５と下地板４の上には防水シートが敷設され、少なくとも下地板４に対して固定されている。
防水シート６としては、ポリ塩化ビニル樹脂系、加硫ゴム系、非加硫ゴム系、熱可塑性エラストマー系、エチレン酢酸ビニル樹脂系等、熱可塑性樹脂層を有する一般的な防水シートが使用できる。施工性、重ねあわせ部分の接合性に優れるためポリ塩化ビニル樹脂系防水シートを用いることが好ましい。
防水シート６は熱可塑性樹脂層の単層でもよいが、寸法安定性、引張強度に優れるという点からガラスクロス、ガラス不織布、ポリエステルクロス、ポリエステル不織布等の基材層を積層した複層品が好ましい。基材層は最下層に設けてもよいが熱可塑性樹脂層の中間に設けてもよい。また熱可塑性樹脂層は一層であっても、複数の層であってもよく、それぞれの層の組成を異なるものとしてもよい。
防水シート６の防火性が向上するとの点から、熱可塑性樹脂層の中間にガラス不織布層を設けた構成とすることが好ましい。 A waterproof sheet is laid on the joint covering material 5 and the base plate 4, and is fixed to at least the base plate 4.
As the waterproof sheet 6, a general waterproof sheet having a thermoplastic resin layer such as a polyvinyl chloride resin type, a vulcanized rubber type, a non-vulcanized rubber type, a thermoplastic elastomer type, and an ethylene vinyl acetate resin type can be used. It is preferable to use a polyvinyl chloride resin-based waterproof sheet because it is excellent in workability and bondability of the overlapped portion.
The tarpaulin 6 may be a single layer of a thermoplastic resin layer, but a multi-layer product in which base layers such as glass cloth, glass non-woven fabric, polyester cloth, and polyester non-woven fabric are laminated is preferable from the viewpoint of excellent dimensional stability and tensile strength. .. The base material layer may be provided at the bottom layer, but may be provided in the middle of the thermoplastic resin layer. Further, the thermoplastic resin layer may be a single layer or a plurality of layers, and the composition of each layer may be different.
From the viewpoint of improving the fire resistance of the waterproof sheet 6, it is preferable to provide a glass non-woven fabric layer in the middle of the thermoplastic resin layer.

防水シート６は難燃性を有する難燃性防水シートを用いることでより防火性が向上するために好ましい。難燃性防水シートは熱可塑性樹脂製層に難燃剤を用いることで得られるまた、防水シート６の表層に難燃性の処理剤や塗料を塗布しても良い。熱可塑性樹脂層に用いる難燃剤としては、有機難燃剤としてハロゲン系難燃剤、リン系難燃剤、シリコーン系難燃剤、無機系難燃剤として金属水酸化物、アンチモン系難燃剤を用いることができる。リン系難燃剤としては可塑剤としても機能するＴＣＰ、ＴＸＰ等のリン系可塑剤が例示され、金属水酸化物としては、水酸化マグネシウムや水酸化アルミニウムなどが例示され、アンチモン系としては三酸化アンチモンが例示できる。防水シート６をポリ塩化ビニル樹脂系防水シートする場合、三酸化アンチモンなどのアンチモン系やＴＣＰ、ＴＸＰ等のリン系難燃剤、水酸化マグネシウムや水酸化アルミニウムなどの金属水酸化物が好適に用いられる。また、ポリ塩化ビニル樹脂系防水シートを２層で構成する場合には、両方の層に難燃剤を添加しても良いし、表面層か裏面層のいずれか一方の層に添加してもよい。
より具体的には、表面層はポリ塩化ビニル樹脂１００重量部に対し可塑剤としてＤＩＮＰを４０〜７０重量部、充填剤として炭酸カルシウム５〜４０重量部とし、裏面層はポリ塩化ビニル樹脂１００重量部に対し可塑剤としてＤＩＮＰを５０〜８０重量部、充填剤として炭酸カルシウム２０〜８０重量部とし、裏面層と表面層表面層または裏面層に難燃剤として三酸化アンチモン２〜２０重量部を添加しても良いし、表面層と裏面層の両方の層にそれぞれ難燃剤として三酸化アンチモン２〜２０重量部を添加しても良い。さらに、表面層と裏面層との間にガラス不織布を用いる構成とすることが防火性の向上との点でより好ましい。 The waterproof sheet 6 is preferable because the fire resistance is further improved by using the flame-retardant waterproof sheet having flame retardancy. The flame-retardant waterproof sheet can be obtained by using a flame retardant in the thermoplastic resin layer, or a flame-retardant treatment agent or paint may be applied to the surface layer of the waterproof sheet 6. As the flame retardant used in the thermoplastic resin layer, a halogen-based flame retardant, a phosphorus-based flame retardant, a silicone-based flame retardant as an organic flame retardant, and a metal hydroxide or an antimony-based flame retardant as an inorganic flame retardant can be used. Examples of phosphorus-based flame retardants include phosphorus-based plasticizers such as TCP and TXP, which also function as plasticizers, examples of metal hydroxides include magnesium hydroxide and aluminum hydroxide, and examples of antimony-based agents are trioxide. Antimony can be exemplified. When the waterproof sheet 6 is made of a polyvinyl chloride resin-based waterproof sheet, antimony-based agents such as antimony trioxide, phosphorus-based flame retardants such as TCP and TXP, and metal hydroxides such as magnesium hydroxide and aluminum hydroxide are preferably used. .. When the polyvinyl chloride resin-based waterproof sheet is composed of two layers, a flame retardant may be added to both layers, or may be added to either the front surface layer or the back surface layer. ..
More specifically, the front surface layer is made of 40 to 70 parts by weight of DINP as a plasticizer and 5 to 40 parts by weight of calcium carbonate as a filler with respect to 100 parts by weight of polyvinyl chloride resin, and the back surface layer is made of 100 parts by weight of polyvinyl chloride resin. 50 to 80 parts by weight of DINP as a plasticizer, 20 to 80 parts by weight of calcium carbonate as a filler, and 2 to 20 parts by weight of antimony trioxide as a flame retardant added to the back surface layer and the surface layer or the back surface layer. Alternatively, 2 to 20 parts by weight of antimony trioxide may be added as a flame retardant to both the front surface layer and the back surface layer, respectively. Further, it is more preferable to use a glass non-woven fabric between the front surface layer and the back surface layer in terms of improving fire resistance.

防水シート６の下地板４への固定方法は、固定用ビスと固定用ディスクを用いる機械固定方法であってよいし、接着剤を用いる接着工法であってもよい。
防水シート６としてポリ塩化ビニル樹脂系防水シートを用い、機械的固定工法とする場合は、ポリ塩化ビニル樹脂系防水シートを下地板４の上に敷設しその上から固定用ディスクを配置し固定用ビスを打ち込みポリ塩化ビニル樹脂系防水シートを固定用ディスクで固定してもよいし、下地板４の上に固定用ディスクを配置し固定用ビスで下地板４に固定し、固定用ディスクの上からポリ塩化ビニル樹脂系防水シートを敷設し固定用ディスクの上面に設けられた接合剤によってポリ塩化ビニル樹脂系防水シートと固定用ディスクとを固定してもよい。 The method of fixing the waterproof sheet 6 to the base plate 4 may be a mechanical fixing method using fixing screws and a fixing disc, or an adhesive method using an adhesive.
When a polyvinyl chloride resin tarpaulin is used as the tarpaulin 6 and a mechanical fixing method is used, a polyvinyl chloride resin tarpaulin is laid on the base plate 4 and a fixing disc is placed on the base plate 4 for fixing. You may drive in a screw and fix the polyvinyl chloride resin tarpaulin with the fixing disc, or you can place the fixing disc on the base plate 4 and fix it to the base plate 4 with the fixing screw, and on the fixing disc. The polyvinyl chloride resin tarpaulin and the fixing disc may be fixed by laying the polyvinyl chloride resin tarpaulin and the adhesive provided on the upper surface of the fixing disc.

また、防水シート６を接着工法で固定する場合の接着剤としては、エポキシ系、ＮＢＲ（ニトリルゴム）系、ＳＢＲ（スチレン-ブタジエンゴム）系、ウレタン系、アクリル系等が挙げられる。ポリ塩化ビニル樹脂系防水シートを用いる場合、ニトリルゴム系接着剤を用いることが好ましい。接着剤は、防水シート６と下地板４の両面に塗布してもよいし、どちらか一方の面に塗布してもよい。 Examples of the adhesive for fixing the tarpaulin 6 by the adhesive method include epoxy type, NBR (nitrile rubber) type, SBR (styrene-butadiene rubber) type, urethane type, acrylic type and the like. When a polyvinyl chloride resin-based waterproof sheet is used, it is preferable to use a nitrile rubber-based adhesive. The adhesive may be applied to both sides of the waterproof sheet 6 and the base plate 4, or may be applied to either side.

ここで、隣り合う防水シート６は重ね合わせを行いその重ねあわせ部の接合は、溶剤による溶着や熱による融着が好ましく、このような溶融着による接合は接着剤を介しての接着よりも接合強度の経時での安定性に優れるため好ましい。溶剤による溶着で用いる溶剤は、防水シート６を構成する樹脂の良溶媒が好ましい。例えば防水シート６がポリ塩化ビニル樹脂系防水シートである場合、主成分としてＴＨＦを用いることが好ましい。 Here, the adjacent waterproof sheets 6 are superposed, and the bonding of the superposed portions is preferably welding by solvent or heat, and such bonding by fusion is more bonding than bonding via an adhesive. It is preferable because it has excellent stability over time. The solvent used for welding with a solvent is preferably a good solvent of the resin constituting the waterproof sheet 6. For example, when the waterproof sheet 6 is a polyvinyl chloride resin-based waterproof sheet, it is preferable to use THF as a main component.

また、下地板目地部Ａの上で防水シート６を重ね合わせ、下地板目地部Ａと防水シート６の重ね合わせ部がおよそ同じ位置に配置されていてもよい。 Further, the waterproof sheet 6 may be overlapped on the base plate joint portion A, and the overlapped portion of the base plate joint portion A and the waterproof sheet 6 may be arranged at substantially the same position.

支持部材は鉄骨や木材を用いることができ、鉄骨を用いることでより大型な建築物の構築が可能となり好ましい。また、鉄骨を用いた大型構築物において、本発明を用いることで屋根の傾斜を小さくしかつ防水性能と防火性能を保持することが可能となり好ましい。 Steel frames and wood can be used as the support members, and it is preferable to use steel frames because it is possible to construct a larger building. Further, in a large-scale structure using a steel frame, it is preferable to use the present invention because it is possible to reduce the inclination of the roof and maintain the waterproof performance and the fireproof performance.

本発明においては、下地板４のほかに別の板状部材を防水性と防火性を損なわない範囲で積層してもよい。板状部材は断熱材や補強板を用いることが出来る。断熱材としては、硬質ウレタンフォーム、ポリスチレンフォーム、ポリエチレンフォーム等、一般的に防水構造に使用されている断熱材を使用できる。補強板としては、セメント板、合板、無機質材を樹脂で固定化したケイカル板等の無機質板等が挙げられる。 In the present invention, in addition to the base plate 4, another plate-shaped member may be laminated within a range that does not impair waterproofness and fireproofness. As the plate-shaped member, a heat insulating material or a reinforcing plate can be used. As the heat insulating material, a heat insulating material generally used for a waterproof structure such as rigid urethane foam, polystyrene foam, and polyethylene foam can be used. Examples of the reinforcing plate include a cement plate, a plywood, an inorganic plate such as a caical plate in which an inorganic material is fixed with a resin, and the like.

実施形態において用いられるビスは、ビス以外に一般的にネジ、ボルト、釘等を用いてもよい。材質としては、炭素鋼、合金鋼、ステンレス鋼等の鋼材などが使用できる。 As the screws used in the embodiment, screws, bolts, nails and the like may generally be used in addition to the screws. As the material, steel materials such as carbon steel, alloy steel, and stainless steel can be used.

第１実施形態の施工方法について図１を用いて説明する。
鉄骨で構成された支持部材１の上に下地板４を配置し、ビス８（図示なし）で支持架台１に固定する。下地板４は野地板２と断熱材３とので構成され、施工前に予め野地板２と断熱材３とを積層し接合一体化されている。なお野地板２の面が上側で断熱材３の面が下側に向けて配置している。そして下地板４は図１では２枚で構成され、隣り合う下地板４を突き付けて配置し、その突きつけた部分である下地板目地部Ａに、不燃材料で構成されたテープである目地被覆材５ａの粘着層を下地板４側にして貼り付ける。目地被覆材５ａは下地板目地部Ａを覆うように貼り付ける。次に、目地被覆材５と下地板４の上にＮＢＲ系接着剤を塗布し、防水シート６を接着剤の上に敷設し、固定する。 The construction method of the first embodiment will be described with reference to FIG.
The base plate 4 is arranged on the support member 1 made of a steel frame, and is fixed to the support base 1 with screws 8 (not shown). The base plate 4 is composed of a field plate 2 and a heat insulating material 3, and the field plate 2 and the heat insulating material 3 are laminated and joined together in advance before construction. The surface of the field plate 2 is arranged on the upper side, and the surface of the heat insulating material 3 is arranged on the lower side. The base plate 4 is composed of two sheets in FIG. 1, and adjacent base plates 4 are abutted and arranged, and a joint covering material which is a tape made of a non-combustible material is applied to the base plate joint portion A which is the abutted portion. The adhesive layer of 5a is attached to the base plate 4 side. The joint covering material 5a is attached so as to cover the joint portion A of the base plate. Next, an NBR-based adhesive is applied on the joint covering material 5 and the base plate 4, and the waterproof sheet 6 is laid on the adhesive and fixed.

第２実施形態の施工方法について図３を用いて説明する。第２実施形態は目地被覆材５として鋼板を用いている。
支持部材１の上に下地板４を配置し、ビス８（図示なし）で支持架台１に固定する。下地板４は野地板２と断熱材３とで構成され、施工前に予め野地板２と断熱材３とを積層し接合一体化されている。なお野地板２の面が上側で断熱材３の面が下側に向けて配置している。そして下地板４は図３では２枚で構成され、隣り合う下地板４を突き付けて配置し、その突きつけた部分である下地板目地部Ａの上には鋼板を折り曲げた帯状の目地被覆材５ｅが配置され、目地被覆材５ｅの両端縁部にビス８が打ち込まれ固定されている。目地被覆材５ｅと下地板４の上を覆って防水シート６が下地板４にＮＢＲ系接着剤で固定されている。 The construction method of the second embodiment will be described with reference to FIG. In the second embodiment, a steel plate is used as the joint covering material 5.
The base plate 4 is arranged on the support member 1 and fixed to the support base 1 with screws 8 (not shown). The base plate 4 is composed of a field plate 2 and a heat insulating material 3, and the field plate 2 and the heat insulating material 3 are laminated and joined together in advance before construction. The surface of the field plate 2 is arranged on the upper side, and the surface of the heat insulating material 3 is arranged on the lower side. The base plate 4 is composed of two sheets in FIG. 3, and adjacent base plates 4 are abutted and arranged, and a strip-shaped joint covering material 5e in which a steel plate is bent is placed on the base plate joint portion A which is the abutted portion. Is arranged, and screws 8 are driven and fixed to both end edges of the joint covering material 5e. The waterproof sheet 6 is fixed to the base plate 4 with an NBR-based adhesive so as to cover the joint covering material 5e and the base plate 4.

以下に、本発明の実施例について説明する。
「実施例１」
実施例１を図１を用いて以下に説明する。鉄骨で構成された支持部材１の上に下地板４が配置され、ビス（図示なし）で支持部材１に固定されている。下地板４は野地板２として木毛セメント板と断熱材３としてフェノールフォームとで構成され、施工前に予め野地板２と断熱材３とを積層し接合一体化されている。なお野地板２の面が上側で断熱材３の面が下側に向けて配置されている。そして下地板４は２枚で構成され、隣り合う下地板４は突き付けて配置され、その突きつけた部分である下地板目地部Ａに、不燃材料で構成されたテープである目地被覆材５ａとしてアルミテープの粘着層を下地板４側にして貼り付けられる。目地被覆材５は下地板目地部Ａを覆うように貼り付けられる。次に、目地被覆材５と下地板４の上にＮＢＲ系接着剤が塗布され、防水シート６としてポリ塩化ビニル樹脂系防水シートがＮＢＲ系接着剤の上に敷設固定されている。 Examples of the present invention will be described below.
"Example 1"
Example 1 will be described below with reference to FIG. The base plate 4 is arranged on the support member 1 made of a steel frame, and is fixed to the support member 1 with screws (not shown). The base plate 4 is composed of a wood wool cement plate as a field plate 2 and a phenol foam as a heat insulating material 3, and the field plate 2 and the heat insulating material 3 are laminated and integrated in advance before construction. The surface of the field plate 2 is arranged on the upper side, and the surface of the heat insulating material 3 is arranged on the lower side. The base plate 4 is composed of two sheets, and the adjacent base plates 4 are abutted and arranged, and aluminum is used as a joint covering material 5a which is a tape made of a non-combustible material on the base plate joint portion A which is the abutted portion. It is attached with the adhesive layer of the tape on the base plate 4 side. The joint covering material 5 is attached so as to cover the joint portion A of the base plate. Next, an NBR-based adhesive is applied onto the joint covering material 5 and the base plate 4, and a polyvinyl chloride resin-based waterproof sheet is laid and fixed on the NBR-based adhesive as the waterproof sheet 6.

「実施例２」
実施例２について図３を用いて説明する。
鉄骨で構成された支持部材１の上に下地板４が配置され、ビス（図示なし）で支持部材１に固定される。下地板４は野地板２として木毛セメント板と断熱材３としてフェノールフォームとので構成され、施工前に予め野地板２と断熱材３とを積層し接合一体化されている。なお野地板２の面が上側で断熱材３の面が下側に向けて配置されている。そして下地板４は２枚で構成され、隣り合う下地板４は突き付けて配置され、その突きつけた部分である下地板目地部Ａに、目地被覆材５ｅとしてポリ塩化ビニル樹脂で被覆した鋼板が用いられる。目地被覆材５ｅは細長い帯状の鋼板を折り曲げて形成され、水平片５１と固定片５４とが脚部５５で接続されている。固定片５４に設けられたビス孔５６にビス８を下地板４の野地板２に向けて打ち込まれ、目地被覆材５ｅが下地板４に固定される。目地被覆材５ｅと下地板４の間に不燃充填材７として、変性シリコーン樹脂系シーリング材が充填されている。不燃充填材７はガラス繊維クロスを充填してもよい。目地被覆材５ｅと下地板４の上にＮＢＲ系接着剤が塗布され、防水シート６としてポリ塩化ビニル樹脂系防水シートがＮＢＲ系接着剤の上に敷設固定されている。 "Example 2"
The second embodiment will be described with reference to FIG.
The base plate 4 is arranged on the support member 1 made of a steel frame, and is fixed to the support member 1 with screws (not shown). The base plate 4 is composed of a wood wool cement plate as a field plate 2 and a phenol foam as a heat insulating material 3, and the field plate 2 and the heat insulating material 3 are laminated and integrated in advance before construction. The surface of the field plate 2 is arranged on the upper side, and the surface of the heat insulating material 3 is arranged on the lower side. The base plate 4 is composed of two sheets, and the adjacent base plates 4 are abutted and arranged, and a steel plate coated with a polyvinyl chloride resin is used as the joint covering material 5e for the base plate joint portion A which is the abutted portion. Be done. The joint covering material 5e is formed by bending an elongated strip-shaped steel plate, and the horizontal piece 51 and the fixing piece 54 are connected by a leg portion 55. The screw 8 is driven into the screw hole 56 provided in the fixing piece 54 toward the field plate 2 of the base plate 4, and the joint covering material 5e is fixed to the base plate 4. A modified silicone resin-based sealing material is filled between the joint covering material 5e and the base plate 4 as a non-combustible filler 7. The non-combustible filler 7 may be filled with glass fiber cloth. An NBR-based adhesive is applied on the joint covering material 5e and the base plate 4, and a polyvinyl chloride resin-based waterproof sheet is laid and fixed on the NBR-based adhesive as the waterproof sheet 6.

「実施例３」
実施例３について図４を用いて説明する。鉄骨で構成された支持部材１の上に下地板４が配置され、ビス（図示なし）で支持部材１に固定されている。下地板４は野地板２として木毛セメント板と断熱材３としてフェノールフォームとで構成され、施工前に予め野地板２と断熱材３とを積層し接合一体化されている。なお野地板２の面が上側で断熱材３の面が下側に向けて配置されている。そして下地板４は２枚で構成され、隣り合う下地板４が突き付けて配置され、その突きつけた部分である下地板目地部Ａに、目地被覆材５ｄとして鋼板を折り曲げた帯状のポリ塩化ビニル被覆鋼板が配置され、目地被覆材５ｄの両端縁部にビス８が打ち込まれ固定されている。目地被覆材５ｄは水平片５１と凸状片５２とを有し、水平片５１が下地板目地部Ａを覆い、凸状片５２が隣り合う下地板４がつき合わされた目地部分に挿入されている。目地被覆材５ｄと下地板４の上を覆って防水シート６としてポリ塩化ビニル樹脂系防水シートが下地板４にＮＢＲ系接着剤で固定されている。 "Example 3"
The third embodiment will be described with reference to FIG. The base plate 4 is arranged on the support member 1 made of a steel frame, and is fixed to the support member 1 with screws (not shown). The base plate 4 is composed of a wood wool cement plate as a field plate 2 and a phenol foam as a heat insulating material 3, and the field plate 2 and the heat insulating material 3 are laminated and integrated in advance before construction. The surface of the field plate 2 is arranged on the upper side, and the surface of the heat insulating material 3 is arranged on the lower side. The base plate 4 is composed of two sheets, and adjacent base plates 4 are abutted and arranged, and a strip-shaped polyvinyl chloride coating in which a steel plate is bent as a joint covering material 5d is applied to the base plate joint portion A which is the abutted portion. A steel plate is arranged, and screws 8 are driven into and fixed to both end edges of the joint covering material 5d. The joint covering material 5d has a horizontal piece 51 and a convex piece 52, the horizontal piece 51 covers the base plate joint portion A, and the convex piece 52 is inserted into the joint portion where the adjacent base plates 4 are joined. There is. A polyvinyl chloride resin-based waterproof sheet is fixed to the base plate 4 with an NBR-based adhesive as a waterproof sheet 6 so as to cover the joint covering material 5d and the base plate 4.

本発明のシート防水構造は主に木造や鉄骨造の屋根に用いることができる。特に大型の構築部の屋根に好適に用いることができる。 The sheet waterproof structure of the present invention can be mainly used for a wooden or steel roof. In particular, it can be suitably used for the roof of a large construction part.

１ 支持部材
２ 野地板
３ 断熱材
４ 下地板
５ 目地被覆材
５１ 水平片
５２ 凸状片
５３ 折り曲げ部
５４ 固定片
５５ 脚部
５６ ビス孔
６ 防水シート
７ 不燃充填材
８ ビス 1 Support member 2 Field plate 3 Insulation material 4 Base plate 5 Joint coating material 51 Horizontal piece 52 Convex piece 53 Bent part 54 Fixed piece 55 Leg part 56 Screw hole 6 Waterproof sheet 7 Non-combustible filler 8 Screw

Claims (9)

屋根を形成する支持部材の上に固定される複数の下地板と、
隣り合う前記下地板を突き付けて形成された目地である下地板目地部の上側に、前記下地板目地部を覆って前記下地板に接合され、不燃材料で構成された目地被覆材と、
前記下地板と前記目地被覆材の上に敷設固定された防水シートとを備える、
シート防水構造。 Multiple base plates fixed on the support members that form the roof,
A joint covering material made of a non-combustible material, which is joined to the base plate by covering the base plate joint portion on the upper side of the base plate joint portion which is a joint formed by abutting the adjacent base plates.
The base plate and the waterproof sheet laid and fixed on the joint covering material are provided.
Sheet waterproof structure. 前記下地板が前記支持部材側に配置された断熱材と前記断熱材と積層された野地板からなり、前記野地板側に防水シートが固定されている請求項１に記載のシート防水構造。 The sheet waterproof structure according to claim 1, wherein the base plate is composed of a heat insulating material arranged on the support member side and a field plate laminated with the heat insulating material, and a waterproof sheet is fixed to the field plate side. 前記目地被覆材が帯状である請求項１または請求項２のいずれか１項に記載のシート防水構造。 The sheet waterproof structure according to any one of claims 1 and 2, wherein the joint covering material is strip-shaped. 前記目地被覆材が前記下地板目地部の上側表面を覆う水平片と前記平面片から下側に向けて凸状に設けられた凸状片とを有し、前記凸状片が前記下地板目地部を構成する隣り合う前記下地板の間に挿入されている請求項１から請求項３のいずれか１項に記載のシート防水構造。 The joint covering material has a horizontal piece covering the upper surface of the base plate joint portion and a convex piece provided in a convex shape from the flat piece toward the lower side, and the convex piece is the base plate joint. The sheet waterproof structure according to any one of claims 1 to 3, which is inserted between adjacent base plates constituting the portion. 前記下地板目地部が複数の前記支持部材の間に設けられている請求項１から請求項４のいずれか１項に記載のシート防水構造。 The sheet waterproof structure according to any one of claims 1 to 4, wherein the base plate joint portion is provided between the plurality of support members. 前記目地被覆材と前記下地板との層間に充填された不燃充填材をさらに備える請求項１から請求項５のいずれか１項に記載のシート防水構造。 The sheet waterproof structure according to any one of claims 1 to 5, further comprising a non-combustible filler filled between the joint covering material and the base plate. 前記防水シートが熱可塑性樹脂層とガラス不織布層とを有し、前記ガラス不織布層の上下面に前記熱可塑性樹脂層が積層されている請求項１から請求項６のいずれか１項に記載のシート防水構造。 The method according to any one of claims 1 to 6, wherein the waterproof sheet has a thermoplastic resin layer and a glass non-woven fabric layer, and the thermoplastic resin layer is laminated on the upper and lower surfaces of the glass non-woven fabric layer. Sheet waterproof structure. 前記防水シートが前記下地板に接着剤で接着されている請求項１から請求項７のいずれか１項に記載のシート防水構造。 The sheet waterproof structure according to any one of claims 1 to 7, wherein the waterproof sheet is adhered to the base plate with an adhesive. 屋根を形成する支持部材の上に複数の下地板を敷設し、複数の前記下地板を突き付けて下地板目地部を形成し、前記下地板を前記支持部材に固定する工程と、
前記下地板目地部の上側を不燃材料で構成された目地被覆材で覆う工程と、
前記下地板と前記目地被覆材の上に防水シートを敷設固定する工程とを備える、
シート防水構造の施工方法。 A step of laying a plurality of base plates on a support member forming a roof, abutting the plurality of base plates to form a base plate joint portion, and fixing the base plate to the support member.
A step of covering the upper side of the base plate joint with a joint covering material made of a non-combustible material, and
A step of laying and fixing a waterproof sheet on the base plate and the joint covering material is provided.
Construction method of sheet waterproof structure.
JP2019082234A 2019-04-23 2019-04-23 Sheet waterproof structure and construction method Pending JP2020180435A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022091824A1 (en) 2020-10-28 2022-05-05 日本発條株式会社 Spring member

Citations (8)

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Publication number Priority date Publication date Assignee Title
JPS5592459A (en) * 1978-12-28 1980-07-12 Ishikawa Takashi Adiabatic water proofing
JPH0771094A (en) * 1993-09-03 1995-03-14 Kubota Corp Roof for building and execution thereof
JPH1061064A (en) * 1996-08-21 1998-03-03 Ig Tech Res Inc Fitting structure of fire-resistant panel
JP2000320086A (en) * 1999-05-07 2000-11-21 Tsuji Sangyo Kk Sheathing panel for roof and roof structure of building
JP2008163671A (en) * 2006-12-28 2008-07-17 Aaki Yamade Kk Roof waterproofing structure
JP2009228417A (en) * 2008-02-28 2009-10-08 Mitsuboshi Belting Ltd Heat-insulating waterproofing construction method
JP2011099267A (en) * 2009-11-06 2011-05-19 Lonseal Corp Waterproof sheet excellent in stain-proof property and durability
JP2015048690A (en) * 2013-09-04 2015-03-16 アーキヤマデ株式会社 Waterproof sheet fixing structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592459A (en) * 1978-12-28 1980-07-12 Ishikawa Takashi Adiabatic water proofing
JPH0771094A (en) * 1993-09-03 1995-03-14 Kubota Corp Roof for building and execution thereof
JPH1061064A (en) * 1996-08-21 1998-03-03 Ig Tech Res Inc Fitting structure of fire-resistant panel
JP2000320086A (en) * 1999-05-07 2000-11-21 Tsuji Sangyo Kk Sheathing panel for roof and roof structure of building
JP2008163671A (en) * 2006-12-28 2008-07-17 Aaki Yamade Kk Roof waterproofing structure
JP2009228417A (en) * 2008-02-28 2009-10-08 Mitsuboshi Belting Ltd Heat-insulating waterproofing construction method
JP2011099267A (en) * 2009-11-06 2011-05-19 Lonseal Corp Waterproof sheet excellent in stain-proof property and durability
JP2015048690A (en) * 2013-09-04 2015-03-16 アーキヤマデ株式会社 Waterproof sheet fixing structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022091824A1 (en) 2020-10-28 2022-05-05 日本発條株式会社 Spring member

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