JP3597094B2

JP3597094B2 - Roofing structure of double roof folded plate roof

Info

Publication number: JP3597094B2
Application number: JP31691099A
Authority: JP
Inventors: 吉久山本; 康令大隅; 克明田中
Original assignee: 住友金属建材株式会社
Priority date: 1999-11-08
Filing date: 1999-11-08
Publication date: 2004-12-02
Anticipated expiration: 2019-11-08
Also published as: JP2001132172A

Description

【０００１】
【発明の属する技術分野】
本発明は、金属製の折板屋根材を用いた屋根葺き構造に関し、さらに詳しくは下葺き折板屋根の上に上葺き折板屋根を葺設して形成される、いわゆる二重葺き折板屋根の屋根葺き構造に関する。
【０００２】
【従来の技術】
金属製の折板屋根材を用いて葺設される折板屋根において、特に高い断熱・防音性が要求される建造物の屋根には、折板屋根を二重葺きし、下葺き折板屋根と上葺き折板屋根との間にグラスウール等の断熱防音材を配置するという屋根葺き構造が採用されている。このような二重葺き折板屋根の基本的な屋根葺き構造を図１１及び図１２に示す。
【０００３】
この屋根葺き構造は、まず、タイトフレーム３の頂部に配置した下葺き側の吊子１５を介して下葺き側の折板屋根材２をはぜ継ぎし、次いで、下葺き側のはぜ継ぎ部２ａに、左右のブロック１２、１３からなるサドル１１を取り付けるとともに、下葺き側の折板屋根材２の表面に断熱防音材４を敷設し、サドル１１に上葺き側の吊子１４を挟み込んで固定しながら、その吊子１４を介して上葺き側の折板屋根材１を支持する、というものである。
【０００４】
【発明が解決しようとする課題】
ところで、従来の二重葺き屋根の屋根葺き構造によれば、下葺き側の折板屋根材が母屋に設けたタイトフレームに支持され、上葺き側の折板屋根材がタイトフレームではなくその上に設置したサドルで支持されているので、屋根に掛かる荷重に対して下葺き側の折板屋根材は何ら寄与しておらず、このため、二重葺き屋根であるのにも関わらず、上葺き側の折板屋根材の１枚分の断面性能しか発揮できず、母屋間隔（支持スパン）を、シングル葺き構造と同じ間隔（３〜４ｍ程度）として二重葺き屋根を葺設しているのが現状である。
【０００５】
本発明はそのような実情に鑑みてなされたもので、屋根全体の断面性能が優れ母屋間隔の長スパン化を達成できる二重葺き折板屋根の屋根葺き構造を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記の目的を達成するため、本発明の二重葺き折板屋根の屋根葺き構造は、母屋に設けたタイトフレームに下葺き側の折板屋根材が下葺き側の吊子を介して支持されているとともに、その支持部にサドルが取り付けられ、このサドルに上葺き側の折板屋根材が上葺き側の吊子を介して支持されてなる屋根葺き構造において、サドルが母屋の上に加えて母屋の間にも設置され、その母屋間に設置されたサドルが上葺き側の折板屋根材と下葺き側の折板屋根材の双方に固定されており、その母屋間のサドルによる上下の折板屋根材の連結により、屋根全体として、少なくとも上葺き側の折板屋根材と下葺き側の折板屋根材の２枚分に相当する断面性能が確保されていることによって特徴づけられる。
【０００７】
ここで、本発明でいう断面性能とは、折板屋根材の断面２次モーメント（断面係数）に基づく強度的な性能のことを意味し、例えば所定スパンで両端支持された折板屋根材の中央部に荷重が作用したときに生じるたわみの大きさで評価することができる。
【０００８】
本発明の作用を図１０を参照しつつ述べる。
まず、従来の二重葺き屋根の屋根葺き構造によれば、図１０（Ａ）のモデルに示すように、下葺き側の折板屋根材２と上葺き側の折板屋根材１とが、それぞれ個別に母屋１０とサドル１１に支持されているので、前記したように下葺き側の折板屋根材２が屋根に掛かる荷重Ｗを支持することができず、上葺き側の折板屋根材１で荷重Ｗの全てを受け持つことになり、その結果として、折板屋根材１の１枚分の断面性能しか発揮できない。
【０００９】
これに対し、本発明の二重葺き屋根の屋根葺き構造のように、サドル１１を、母屋１０の上に加えて母屋１０の間にも設置すると、図１０（Ｂ）のモデルに示すように、屋根にかかる荷重Ｗを、上葺き側の折板屋根材１に加えて、下葺き側の折板屋根材２でも支えることができるので、上葺き側の折板屋根材１と下葺き側の折板屋根材２の断面性能を合成した、少なくとも折板屋根材の２枚分に相当する断面性能を確保することができる。
【００１０】
さらに、本発明の二重葺き屋根の屋根葺き構造では、母屋間に設置するサドルを、上葺き側の折板屋根材と下葺き側の折板屋根材の双方に固定しているので、上葺き側の折板屋根材と下葺き側の折板屋根材とが相互に連結されて、支持スパン方向（母屋と直交する方向）における剛性が高められるので、折板屋根材の２枚分よりも大きな断面性能を得ることが可能になる。この場合、上下の各折板屋根材に対するサドルの固定力が弱いと、上下の折板屋根材を連結する効果が薄れるので、上下の各折板屋根材とサドルとの間に位置ずれが生じないように、サドルを各折板屋根材にしっかりと固定する必要がある。
【００１１】
なお、本発明の二重葺き屋根の屋根葺き構造において、母屋間に設置するサドルの数は１個または２個以上であってもよい。２個以上設置する場合、サドルの配置位置（サドル間のピッチ）を適当に選定して、それらサドルによって高められる断面性能が最大となるように配置することが望ましい。
【００１２】
また、本発明の二重葺き屋根の屋根葺き構造に用いるサドルの材質としては、ＡＢＳ樹脂等の樹脂、あるいはステンレスまたは普通鋼等の金属が挙げられるが、母屋間に設置するサドルについては、前記したような工法つまりサドル上下の各折板屋根材を強固に固定するという工法を採用する場合、金属製のものを用いることが好ましい。
【００１３】
【発明の実施の形態】
本発明の実施の形態を、以下、図面に基づいて説明する。
【００１４】
まず、本実施形態に用いるサドルの構造を説明する。サドル１１は、ステンレス等の金属の加工品（または樹脂成形品）で、図１、図２及び先の図１１に示すように、左右のブロック１２、１３からなり、二重葺き折板屋根の上葺き側の折板屋根材１と下葺き側の折板屋根材２との間に設置される。
【００１５】
左右のブロック１２、１３の中央部の２箇所には、穴中心が互いに一致するボルト用貫通穴１２ａ、１３ａが設けられており、このボルト用貫通穴１２ａ、１３ａに締結ボルト２１を通し、そのボルト端部にナット２２をねじ込むことにより、左右のブロック１２、１３を連結することができる。
【００１６】
左右のブロック１２、１３の上部中央には、穴中心が互いに一致するボルト用貫通穴１２ｂ、１３ｂが設けられている。また、左右のブロック１２、１３の接触面の下部には、下葺き側の折板屋根材２のはぜ継ぎ部２ａを保持する係止溝Ｃを形成するための係止凹部１２ｃ、１３ｃが設けられており、さらに、左右のブロック１２、１３の下部中央には、穴中心が互いに一致するボルト用貫通穴１２ｄ、１３ｄが設けられている。
【００１７】
以上の構造のサドル１１を用いた二重葺き折板屋根は、図１、図２及び先の図１１に示すように、タイトフレーム３の頂部に固定した下葺き側の吊子１５を介して、下葺き側の折板屋根材２のすくい側のはぜ部とかぶせ側のはぜ部とをシーマー等によりはぜ締めする。次いで、サドル１１の締結ボルト２１・ナット２２による締結を緩めて左右のブロック１２、１３間に隙間をあけた状態で、係止溝Ｃ（係止凹部１２ｃ、１３ｃ）に、下葺き側の折板屋根材２のはぜ継ぎ部２ａを差し込んだ後、ボルト用貫通穴１２ｄ、１３ｄにボルト（セルフドリリング）２５を差し込んで、はぜ継ぎ部２ａを貫通させてねじ込むことにより、下葺き側の吊子５及び下葺き側の折板屋根材２をサドル１１に保持する。
【００１８】
次に、締結ボルト２１を締め込んで左右のブロック１２、１３を連結し、次いで下葺き側の折板屋根材２の表面に断熱防音材４を敷設した後、上葺き側の吊子（Ｔ字形）１４を左右のブロック１２、１３間に挟み、この上葺き側の吊子１４の貫通穴１４ａと上部中央のボルト用貫通穴１２ｂ、１３ｂとを合わせた状態で、ボルト用貫通穴１２ｂ、１３ｂにボルト２３を通し、そのボルト端部をナット２４にねじ込むことによって上葺き側の吊子１４をサドル１１に保持した後、上葺き側の折板屋根材１の合わせ部１ａを、上葺き側の吊子１４の水平片１４ｂの下側に嵌め込む、という手順で組み立てられる。
【００１９】
そして、本実施形態では、以上のようにして構築される二重葺き折板屋根において、図３及び図４に示すように、サドル１１を、母屋１０の上に加えて母屋１０の間の３箇所（等ピッチ）に設置して、二重葺き折板屋根の断面性能を高めたところに特徴がある。
【００２０】
図３及び図４に示す構造において、母屋１０の上に設置するサドル１１は、図１及び図２に示した要領つまり下葺き側の吊子１５を介して下葺き側の折板屋根材２のはぜ継ぎ部２ａに支持するとともに、上葺き側の吊子１４を用いて上葺き側の折板屋根材１をサドル１１に保持するという要領で施工されるが、母屋１０の間に設置する３個のサドル１１・・１１については、下葺き側の吊子１５を使用せず、次のような要領で施工する。
【００２１】
まず、図６に示す形状の左右の固定ブロック３１、３２とキャップ３３、及びセルフドリリングビス３４（図５）を用意しておき、図５に示すように、下葺き側の折板屋根材２のはぜ継ぎ部２ａ′（吊子無）を、サドル１１の係止溝Ｃに前記した要領で差し込んで、そのはぜ継ぎ部２ａ′をボルト２５にて固定する。次に、前記した要領（図２）にて、サドル１１に上葺き側の吊子１４を取り付け、上葺き側の折板屋根材１の合わせ部１ａを吊子１４の側方に嵌め込んだ後、折板屋根材１の合わせ部１ａの側方にそれぞれ固定ブロック３１、３２を配置するとともに、その各固定ブロック３１、３２の嵌合凹部３１ａ、３２ａにキャップ３３の両下端部を嵌め込んだ後、キャップ３３の孔３３ａにセルフドリリングビス３４をねじ込むことによって、上葺き側の折板屋根材１をサドル１１とを相互に固定する。
【００２２】
以上の図３〜図５に示す構造によれば、母屋１０の間の３箇所にサドル１１・・１１が設置されており、しかも、各サドル１１が上葺き側の折板屋根材１と下葺き側の折板屋根材２の双方にしっかりと固定されているので、それら上下の折板屋根材１、２が互いに強固に連結され、支持スパン方向における剛性を高めることができる。その結果として、二重屋根全体としての断面性能が、上葺き側の折板屋根材１と下葺き側の折板屋根材２の２枚分に相当する断面性能よりも十分に大きくなり、母屋間隔（支持スパン）を従来よりも広くすることができる。
【００２３】
例えば、従来の構造では、母屋間隔が３〜４ｍ程度であったのに対し、その間隔を６〜８ｍ程度にまで拡げることが可能になる。また、母屋間隔を従来の構造よりも大きくしても、上下の折板屋根材１、２の板厚、特に上葺き側の折板屋根材１の板厚を薄くすることも可能になり、折板屋根材１の材料コストの低減化もはかることができる。
【００２４】
ここで、母屋１０の間に設置するサドル１１を固定する方法は、図５に示した構造のほか、様々な形態が考えられる。その例を図７〜図９に示す。
【００２５】
図７に示す構造では、上葺き側の折板屋根材１の合わせ部１ａを上葺き側の吊子１４の水平片１４ａに押さえ付けることのできる形状のキャップ３５とビス３６を用い、前記した要領（図２）にて、サドル１１に上葺き側の吊子１４を取り付け、上葺き側の折板屋根材１の合わせ部１ａを吊子１４の側方に嵌め込んだ後、折板屋根材１の合わせ部１ａの側方からビス３６を、折板屋根材１の合わせ部１ａ、吊子１４及び合わせ部１ａを順に貫通させてねじ込み、次いでキャップ３５を吊子１４の上部に被せることにより、上葺き側の折板屋根材１とサドル１１とを相互に固定している。また、図８に示す構造では、同様にして、上葺き側の吊子１４と上葺き側の折板屋根材１を施工した後、先と同じ構造のキャップ３５を吊子１４の上部に被せ、そのキャップ１４の上方からビス３６を、キャップ３５、吊子１４の水平片１４ａ及び折板屋根材１を順に貫通させてねじ込むことによって、上葺き側の折板屋根材１とサドル１１とを相互に固定している。なお、これら図７及び図８の構造において、下葺き側の折板屋根材２とサドル１１との固定は図５と同じ要領で行う。
【００２６】
図９に示す構造では、図５と同じ要領で下葺き側の折板屋根材２とサドル１１とを固定し、次いで上葺き側の折板屋根材１を設置した後、各上葺き側の折板屋根材１の上方からセルフドリリングビス３７を、サドル１１の各ブロック１２、１３に向けてねじ込んで各折板屋根材１をサドル１１に固定している。なお、この構造において、セルフドリリングビス３７は、サドル１１の各ブロック１２、１３の中央部で締結ボルト２１とは干渉しない位置にねじ込む。
【００２７】
【発明の効果】
以上説明したように、本発明の二重葺き折板屋根の屋根葺き構造によれば、サドルが母屋の上に加えて母屋の間にも設置され、その母屋間に設置されたサドルによって、屋根全体として、少なくとも上葺き側の折板屋根材と下葺き側の折板屋根材の２枚分に相当する断面性能を確保しているので、長スパンの施工が可能になり、従来の屋根葺き構造よりも母屋間隔を大きくすることができる。これにより、鉄骨（小梁）の材料・施工コストの低減化をはかることができ、経済的な二重葺き折板屋根を構築することができる。
【図面の簡単な説明】
【図１】本発明の実施形態に用いるサドルを使用状態で示す斜視図である。
【図２】同じくサドルを使用状態で示す正面図である。
【図３】本発明の実施形態の構造を模式的に示す側面図である。
【図４】本発明の実施形態の要部構造を上葺き側の折板屋根材を取り付けない状態で模式的に示す斜視図である。
【図５】本発明の実施形態の要部構造を模式的に示す図である。
【図６】図５の実施形態に用いる固定ブロック及びキャップを示す斜視図である。
【図７】本発明の他の実施形態の要部構造を模式的に示す図である。
【図８】本発明の別の実施形態の要部構造を模式的に示す図である。
【図９】本発明の更に別の実施形態の要部構造を模式的に示す図である。
【図１０】本発明の作用説明図である。
【図１１】従来の二重葺き折板屋根の一例を示す断面図である。
【図１２】図１０の二重葺き折板屋根の要部構造を上葺き側の折板屋根材を取り付けない状態で模式的に示す斜視図である。
【符号の説明】
１折板屋根材（上葺き側）
２折板屋根材（下葺き側）
２ａ，２ａ′ はぜ継ぎ部
３タイトフレーム
４断熱防音材
１０母屋
１１サドル
１２，１３ブロック
Ｃ係止溝
１４吊子（上葺き側）
１５吊子（下葺き側）
２１締結用ボルト
３１，３２固定ブロック
３３キャップ
３４セルフドリリングビス
３５キャップ
３６ビス
３７セルフドリリングビス[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a roofing structure using a metal folded plate roofing material, and more specifically, a so-called double roofed folding plate formed by laying an upper roofing folded roof on a lower roofing folded roof. The present invention relates to a roofing structure of a roof.
[0002]
[Prior art]
In the case of a shingle roof that is laid using metal shingle roofing materials, especially for a roof of a building that requires high heat insulation and soundproofing properties, the shingle roof is double-roofed, and the underlaying shingle roof is used. A roofing structure has been adopted in which a heat insulating and soundproofing material such as glass wool is arranged between the roof and the folded roof. FIGS. 11 and 12 show a basic roofing structure of such a double-folded folded-plate roof.
[0003]
In the roofing structure, first, the folded roofing material 2 on the lower roof side is spliced via the lower-laying hanger 15 arranged on the top of the tight frame 3, and then the seam on the lower roof side is spliced. A saddle 11 composed of left and right blocks 12 and 13 is attached to the portion 2a, and a heat insulating and soundproofing material 4 is laid on the surface of the folded roof material 2 on the lower roof side, and a hanging member 14 on the upper roof side is sandwiched between the saddles 11. While supporting the folded roof material 1 on the roofing side via the hooks 14.
[0004]
[Problems to be solved by the invention]
By the way, according to the conventional double-roofed roofing structure, the folded roof material on the lower roof is supported by the tight frame provided in the main building, and the folded roof material on the upper roof is not on the tight frame but on the tight frame. Is supported by the saddle installed on the roof, the folded roof material on the lower roof side does not contribute to the load on the roof at all, and therefore, despite the double roof, It can only exhibit the cross-sectional performance of one folded-plate roofing material on the roofing side, and a double-roofed roof is laid with the main building spacing (support span) being the same as the single-roofed structure (about 3 to 4 m). is the current situation.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a roofing structure of a double roof folded plate roof which has excellent cross-sectional performance of the entire roof and can achieve a long span between purlins.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the roofing structure of the double-folded folded-plate roof of the present invention is configured such that the folded-plate roofing material on the lower roof side is supported by a tight frame provided in the main building via a lower-arm side lifter. In addition, a saddle is attached to the support part, and the saddle is added to the main building in a roofing structure in which a folded-plate roofing material on the roofing side is supported via a hook on the roofing side. It is also installed between the main buildings, and the saddle installed between the main buildings is fixed to both the folded roof material on the upper roof and the folded roof material on the lower roof. Is characterized by the fact that the cross section performance equivalent to at least two of the folded roof material on the upper roof side and the folded roof material on the lower roof side is secured as a whole roof by the connection of the folded roof materials. .
[0007]
Here, the cross-sectional performance in the present invention means a strength performance based on a second moment of area (section modulus) of the folded roof material, and for example, a folded roof material supported at both ends in a predetermined span. The evaluation can be made based on the magnitude of deflection generated when a load is applied to the central portion.
[0008]
The operation of the present invention will be described with reference to FIG.
First, according to the conventional double-roofed roofing structure, as shown in the model of FIG. 10A, the folded roofing material 2 on the lower roof side and the folded roofing material 1 on the upper roof side are: Since each is supported by the purlin 10 and the saddle 11 individually, the folded roof material 2 on the lower roof cannot support the load W applied to the roof as described above, and the folded roof material on the upper roof side 1, the entire load W is taken over, and as a result, only the cross-sectional performance of one folded sheet roofing material 1 can be exhibited.
[0009]
On the other hand, when the saddle 11 is provided between the main building 10 and the main building 10 as in the double-roofed roofing structure of the present invention, as shown in the model of FIG. Since the load W applied to the roof can be supported by the folded roof material 2 on the lower roof side in addition to the folded roof material 1 on the upper roof side, the folded roof material 1 on the upper roof side and the lower roof side 1 can be supported. The cross-sectional performance of at least two folded plate roof materials obtained by combining the cross-sectional performances of the folded plate roof materials 2 can be secured.
[0010]
Furthermore, the double roofing roofing structure of the present invention, the saddle is placed between the purlins, since the fixed to both the folding plate roofing foldable plate roofing upper roofing side and lower roofing side, upper The shingled roof material and the shingled roof material are connected to each other to increase the rigidity in the support span direction (perpendicular to the main building). It is also possible to obtain a large cross-sectional performance. In this case, if the fixing force of the saddle to the upper and lower folded sheet roofing materials is weak, the effect of connecting the upper and lower folded sheet roofing materials is weakened. Saddles must be securely fastened to each shingle roofing material so that they do not fall.
[0011]
In the double-roofed roofing structure of the present invention, the number of saddles installed between the purlins may be one or two or more. When two or more saddles are installed, it is desirable to appropriately select the arrangement position of the saddles (pitch between the saddles) and arrange them so that the cross-sectional performance enhanced by the saddles is maximized.
[0012]
In addition, examples of the material of the saddle used for the roofing structure of the double-roofed roof of the present invention include a resin such as an ABS resin or a metal such as stainless steel or ordinary steel. In the case of adopting such a construction method, that is, a construction method of firmly fixing each folded plate roof material above and below the saddle, it is preferable to use a metal one.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
First, the structure of the saddle used in the present embodiment will be described. The saddle 11 is a processed product (or a resin molded product) of a metal such as stainless steel, and is composed of left and right blocks 12 and 13 as shown in FIGS. It is installed between the folded roof material 1 on the upper roof side and the folded roof material 2 on the lower roof side.
[0015]
Bolt through holes 12a, 13a whose hole centers coincide with each other are provided at two places at the center of the left and right blocks 12, 13, and the fastening bolt 21 is passed through the bolt through holes 12a, 13a. By screwing the nut 22 into the bolt end, the left and right blocks 12, 13 can be connected.
[0016]
Bolt through-holes 12b, 13b whose hole centers coincide with each other are provided in the upper centers of the left and right blocks 12, 13. At the lower part of the contact surface between the left and right blocks 12, 13, locking recesses 12c, 13c for forming locking grooves C for holding the seam joints 2a of the folded roof material 2 on the roofing side are provided. Further, bolt through holes 12d and 13d whose hole centers coincide with each other are provided in the lower centers of the left and right blocks 12 and 13.
[0017]
As shown in FIGS. 1, 2, and 11, the double-folded folded-plate roof using the saddle 11 having the above-described structure is connected to the underlaying-side suspension 15 fixed to the top of the tight frame 3. Then, the rake side and the cover side of the underlaying folded plate roofing material 2 are tightened with a seamer or the like. Next, the fastening of the saddle 11 with the fastening bolts 21 and the nuts 22 is loosened so that a gap is left between the left and right blocks 12 and 13, and the lower groove side folding is performed on the locking groove C (the locking recesses 12c and 13c). After inserting the seam joint 2a of the plate roofing material 2, a bolt (self-drilling) 25 is inserted into the bolt through holes 12d and 13d, and the seam joint 2a is penetrated and screwed into the lower roofing side. The suspender 5 and the folded roofing material 2 on the lower roof side are held on the saddle 11.
[0018]
Next, the fastening bolts 21 are tightened to connect the left and right blocks 12 and 13, and then the heat insulating and soundproofing material 4 is laid on the surface of the folded roof material 2 on the lower roof side. ) Is sandwiched between the left and right blocks 12 and 13, and the through holes 14 a of the overhanger 14 on the roofing side are aligned with the through holes 12 b and 13 b for the bolts at the upper center, so that the bolt through holes 12 b and A bolt 23 is passed through 13b, and an end of the bolt is screwed into a nut 24 to hold the hanging member 14 on the roofing side on the saddle 11. Then, the joining portion 1a of the folded plate roofing material 1 on the roofing side is roofed. It is assembled by the procedure of being fitted to the lower side of the horizontal piece 14b of the side suspension 14.
[0019]
In the present embodiment, as shown in FIGS. 3 and 4, the saddle 11 is added to the top of the main building 10, and the space between the main buildings 10 is increased. It is characterized by being installed at locations (equal pitch) to enhance the cross-sectional performance of a double-roof folded-plate roof.
[0020]
In the structure shown in FIGS. 3 and 4, the saddle 11 installed on the purlin 10 has the same structure as that shown in FIGS. It is constructed in such a manner that it is supported on the seam joint 2a and that the folded roofing material 1 on the roofing side is held on the saddle 11 by using the hanging member 14 on the roofing side. The three saddles 11 are to be constructed in the following manner without using the underlay side suspensions 15.
[0021]
First, the left and right fixing blocks 31, 32, the cap 33, and the self-drilling screw 34 (FIG. 5) having the shape shown in FIG. 6 are prepared, and as shown in FIG. The fly joint portion 2a '(without a hook) is inserted into the engaging groove C of the saddle 11 in the above-described manner, and the fly joint portion 2a' is fixed with bolts 25. Next, according to the above-described procedure (FIG. 2), the hanging member 14 on the roofing side was attached to the saddle 11, and the fitting portion 1 a of the folded roof material 1 on the roofing side was fitted to the side of the hanging member 14. After that, the fixed blocks 31 and 32 are arranged on the side of the mating portion 1a of the folded plate roofing material 1, respectively, and the lower ends of the cap 33 are fitted into the fitting concave portions 31a and 32a of the fixed blocks 31 and 32, respectively. Thereafter, the self-drilling screw 34 is screwed into the hole 33 a of the cap 33, thereby fixing the folded roof material 1 on the roofing side and the saddle 11 to each other.
[0022]
According to the structure shown in FIGS. 3 to 5 described above, saddles 11 are installed at three places between the purlins 10, and each saddle 11 is connected to the folded roofing material 1 on the roofing side. Since it is firmly fixed to both the roof-side folded plate roofing materials 2, the upper and lower folded plate roofing materials 1 and 2 are firmly connected to each other, and the rigidity in the support span direction can be increased. As a result, the cross-sectional performance of the entire double roof becomes sufficiently larger than the cross-sectional performance corresponding to two sheets of the folded roof material 1 on the upper roof side and the folded roof material 2 on the lower roof side. The interval (support span) can be made wider than before.
[0023]
For example, in the conventional structure, the purlin interval is about 3 to 4 m, but the interval can be increased to about 6 to 8 m. Further, even if the purlin interval is made larger than the conventional structure, it is possible to reduce the thickness of the upper and lower folded sheet roofing materials 1 and 2, particularly, the thickness of the folded roofing material 1 on the roofing side. The material cost of the folded roof material 1 can also be reduced.
[0024]
Here, as a method of fixing the saddle 11 installed between the purlins 10, various forms can be considered in addition to the structure shown in FIG. The example is shown in FIGS.
[0025]
In the structure shown in FIG. 7, a cap 35 and a screw 36 having a shape capable of pressing the mating portion 1 a of the folded roofing material 1 on the roofing side to the horizontal piece 14 a of the hanging member 14 on the roofing side are used. According to the procedure (FIG. 2), the hanging member 14 on the roofing side is attached to the saddle 11, and the fitting portion 1 a of the folded roof material 1 on the roofing side is fitted to the side of the hanging member 14, and then the folded plate roof is formed. A screw 36 is screwed in from the side of the joining portion 1a of the material 1 so as to penetrate the joining portion 1a, the suspension 14 and the joining portion 1a of the folded-plate roofing material 1 in order, and then the cap 35 is put on the upper portion of the suspension 14. Thereby, the folded-plate roofing material 1 on the roofing side and the saddle 11 are fixed to each other. In the structure shown in FIG. 8, similarly, the cap 35 having the same structure as above is placed on the upper part of the suspender 14 after the upper side suspender 14 and the folded roofing material 1 on the upper side are constructed. By screwing a screw 36 from above the cap 14 into the cap 35, the horizontal piece 14 a of the suspender 14, and the folded sheet roof material 1 in order, and screwing the folded sheet roof material 1 on the roofing side and the saddle 11. Mutually fixed. In the structure shown in FIGS. 7 and 8, the fixed roof member 2 and the saddle 11 on the lower roof side are fixed in the same manner as in FIG.
[0026]
In the structure shown in FIG. 9, the folded roof material 2 on the lower roof side and the saddle 11 are fixed in the same manner as in FIG. 5, and then the folded roof material 1 on the upper roof side is installed. A self-drilling screw 37 is screwed from above the folded sheet roofing material 1 toward each block 12, 13 of the saddle 11 to fix each folded sheet roofing material 1 to the saddle 11. In this structure, the self-drilling screw 37 is screwed into the center of each of the blocks 12 and 13 of the saddle 11 so as not to interfere with the fastening bolt 21.
[0027]
【The invention's effect】
As described above, according to the roofing structure of the double-layered folded-plate roof of the present invention, the saddle is installed between the main buildings in addition to the main building, and the saddle is installed between the main buildings. As a whole, the cross-section performance equivalent to at least two sheets of the folded roof material on the upper roof side and the folded roof material on the lower roof side is secured, so that long span construction is possible and the conventional roof The purlin interval can be made larger than the structure. As a result, it is possible to reduce the material and the construction cost of the steel frame (small beam), and it is possible to construct an economical double-folded folded plate roof.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a use state of a saddle used in an embodiment of the present invention.
FIG. 2 is a front view showing the saddle in use.
FIG. 3 is a side view schematically showing the structure of the embodiment of the present invention.
FIG. 4 is a perspective view schematically showing a main structure according to the embodiment of the present invention in a state where a folded roof material on a roofing side is not attached.
FIG. 5 is a diagram schematically showing a main structure of an embodiment of the present invention.
FIG. 6 is a perspective view showing a fixing block and a cap used in the embodiment of FIG. 5;
FIG. 7 is a view schematically showing a main part structure of another embodiment of the present invention.
FIG. 8 is a diagram schematically showing a main part structure of another embodiment of the present invention.
FIG. 9 is a view schematically showing a main part structure of still another embodiment of the present invention.
FIG. 10 is an operation explanatory view of the present invention.
FIG. 11 is a cross-sectional view showing an example of a conventional double-roofed plate roof.
12 is a perspective view schematically showing a structure of a main part of the double-roofed shingle roof of FIG. 10 in a state where a folded-roof material on the roofing side is not attached.
[Explanation of symbols]
1 folded board roofing material (the roofing side)
2 Folded sheet roofing material (underlaying side)
2a, 2a 'seam joint 3 tight frame 4 heat insulation and soundproofing material 10 purlin 11 saddle 12, 13 block C locking groove 14 hangers (top roof side)
15 Hanger (underlaying side)
21 fastening bolts 31, 32 fixing block 33 cap 34 self-drilling screw 35 cap 36 screw 37 self-drilling screw

Claims

母屋に設けたタイトフレームに下葺き側の折板屋根材が下葺き側の吊子を介して支持されているとともに、その支持部にサドルが取り付けられ、このサドルに上葺き側の折板屋根材が上葺き側の吊子を介して支持されてなる屋根葺き構造において、サドルが母屋の上に加えて母屋の間にも設置され、その母屋間に設置されたサドルが上葺き側の折板屋根材と下葺き側の折板屋根材の双方に固定されており、その母屋間のサドルによる上下の折板屋根材の連結により、屋根全体として、少なくとも上葺き側の折板屋根材と下葺き側の折板屋根材の２枚分に相当する断面性能が確保されていることを特徴とする二重葺き折板屋根の屋根葺き構造。An underlaying folded sheet roofing material is supported on a tight frame provided in the main building via an underlaying hanger, and a saddle is attached to the support. In a roofing structure in which the timber is supported via a hanging member on the roof, a saddle is installed between the roof and the roof, and the saddle installed between the roofs is folded on the roof. It is fixed to both the flat roof material and the folded roof material on the lower roof.By connecting the upper and lower folded roof materials with saddles between the main buildings , the roof as a whole, at least with the folded roof material on the upper roof side A roofing structure for a double-folded folded-plate roof, wherein a cross-sectional performance equivalent to two sheets of the folded-plate roof material on the lower roof side is secured.