JP6787230B2

JP6787230B2 - Metal roofing material

Info

Publication number: JP6787230B2
Application number: JP2017074387A
Authority: JP
Inventors: 大久保　謙一; 謙一大久保; 元仁黒瀧; 杉田　修一; 修一杉田; 和泉　圭二; 圭二和泉; 彰啓安藤; 朋幸長津; 祐吾太田
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2017-04-04
Filing date: 2017-04-04
Publication date: 2020-11-18
Anticipated expiration: 2037-04-04
Also published as: JP2018178393A

Description

本発明は、金属製の表基材を有する金属屋根材に関する。 The present invention relates to a metal roofing material having a metal surface base material.

本発明者らは、下記の特許文献１に示されているような金属屋根材、すなわち金属製の表基材と、表基材の裏側に配置された裏基材と、表基材と裏基材との間に充填された発泡樹脂からなる芯材とを備えた金属屋根材の実用化を試みている。 The present inventors have a metal roofing material as shown in Patent Document 1 below, that is, a metal front base material, a back base material arranged on the back side of the front base material, and a front base material and a back side. We are trying to put into practical use a metal roofing material provided with a core material made of foamed resin filled between the base material and the base material.

特許第５８６４０１５号公報Japanese Patent No. 5864015

上記のような金属屋根材では、例えばアルミ箔又はアルミ蒸着紙等の薄い素材を裏基材に使用しているので、裏側の強度が低く、金属屋根材全体としても耐風圧性能が不十分になることがある。 In the metal roofing material as described above, since a thin material such as aluminum foil or aluminum vapor-deposited paper is used for the backing material, the strength of the back side is low, and the wind pressure resistance performance of the metal roofing material as a whole is insufficient. May become.

本発明は、上記のような課題を解決するためになされたものであり、その目的は、耐風圧性能を向上できる金属屋根材を提供することである。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a metal roofing material capable of improving wind pressure resistance.

本発明に係る金属屋根材は、金属板を素材とし箱状の本体部を有する表基材と、本体部の開口を塞ぐように表基材の裏側に配置された裏基材と、本体部と裏基材との間に充填された芯材とを備え、幅方向が屋根の軒方向に延在するとともに、奥行方向が屋根の軒棟方向に延在するように屋根下地の上に配置される金属屋根材であって、幅方向に互いに離間するとともに長手方向が奥行方向に延在するように芯材にそれぞれ埋め込まれた複数の長手状の板状補強部材をさらに備え、板状補強部材は、幅方向及び奥行方向に延在する基板部と、基板部から本体部の高さ方向に延出されるとともに、奥行方向に延在された補強リブとを有している。 The metal roofing material according to the present invention has a front base material made of a metal plate and having a box-shaped main body portion, a back base material arranged on the back side of the front base material so as to close the opening of the main body portion, and a main body portion. It is provided with a core material filled between the roof and the backing base material, and is placed on the roof base so that the width direction extends toward the eaves of the roof and the depth direction extends toward the eaves of the roof. The metal roofing material is further provided with a plurality of longitudinal plate-shaped reinforcing members embedded in the core material so as to be separated from each other in the width direction and extend in the longitudinal direction in the longitudinal direction. The member has a substrate portion extending in the width direction and the depth direction, and a reinforcing rib extending from the substrate portion in the height direction of the main body portion and extending in the depth direction.

本発明の金属屋根材によれば、金属屋根材の奥行方向に延在する補強リブを有する複数の長手状の板状補強部材が、金属屋根材の幅方向に互いに離間するとともに、長手方向が金属屋根材の奥行方向に延在するように芯材にそれぞれ埋め込まれているので、屋根下地に緊結された金属屋根材の軒側端部を持ち上げるような曲げに対する金属屋根材の剛性を増大できる。これにより、金属屋根材の耐風圧性能を向上できる。 According to the metal roofing material of the present invention, a plurality of longitudinal plate-shaped reinforcing members having reinforcing ribs extending in the depth direction of the metal roofing material are separated from each other in the width direction of the metal roofing material, and the longitudinal direction is different. Since each of the metal roofing materials is embedded in the core material so as to extend in the depth direction, the rigidity of the metal roofing material can be increased against bending such as lifting the eaves side end of the metal roofing material bonded to the roof base. .. As a result, the wind pressure resistance performance of the metal roofing material can be improved.

本発明の実施の形態による金属屋根材を示す平面図である。It is a top view which shows the metal roofing material by embodiment of this invention. 図１の金属屋根材を示す底面図である。It is a bottom view which shows the metal roofing material of FIG. 図１の線ＩＩＩ−ＩＩＩに沿う金属屋根材の断面図である。It is sectional drawing of the metal roofing material along the line III-III of FIG. 図１の板状補強部材を示す斜視図である。It is a perspective view which shows the plate-shaped reinforcing member of FIG. 図１の線Ｖ−Ｖに沿う金属屋根材の断面図である。It is sectional drawing of the metal roofing material along the line VV of FIG.

以下、本発明を実施するための形態について、図面を参照して説明する。
実施の形態１．
図１は本発明の実施の形態による金属屋根材１を示す平面図であり、図２は図１の金属屋根材１を示す底面図であり、図３は図１の線ＩＩＩ−ＩＩＩに沿う金属屋根材１の断面図であり、図４は図１の板状補強部材５を示す斜視図であり、図５は図１の線Ｖ−Ｖに沿う金属屋根材１の断面図である。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1.
FIG. 1 is a plan view showing the metal roofing material 1 according to the embodiment of the present invention, FIG. 2 is a bottom view showing the metal roofing material 1 of FIG. 1, and FIG. 3 is along line III-III of FIG. It is a cross-sectional view of the metal roofing material 1, FIG. 4 is a perspective view showing a plate-shaped reinforcing member 5 of FIG. 1, and FIG. 5 is a cross-sectional view of the metal roofing material 1 along the line VV of FIG.

図１〜３に示す金属屋根材１は、奥行方向１Ｄと比較して幅方向１Ｗに長い平面視略矩形状の部材であり、例えば家屋等の屋根において他の金属屋根材とともに屋根下地の上に配置されるものである。本実施の形態の金属屋根材１は、幅方向１Ｗが屋根の棟方向に延在するとともに、奥行方向１Ｄが屋根の軒棟方向に延在するように屋根下地の上に配置される。 The metal roofing material 1 shown in FIGS. 1 to 3 is a member having a substantially rectangular shape in a plan view that is longer in the width direction of 1W as compared with the depth direction of 1D. For example, in the roof of a house or the like, on the roof base together with other metal roofing materials. It is placed in. The metal roofing material 1 of the present embodiment is arranged on the roof base so that the width direction 1W extends toward the roof ridge and the depth direction 1D extends toward the roof ridge.

図１〜図３に示すように、金属屋根材１は、表基材２、裏基材３、芯材４及び複数の板状補強部材５を有している。 As shown in FIGS. 1 to 3, the metal roofing material 1 has a front base material 2, a back base material 3, a core material 4, and a plurality of plate-shaped reinforcing members 5.

＜表基材について＞
表基材２は、金属板を素材とする金属製の部材であり、金属屋根材１が屋根下地の上に配置された際に屋根の外面に表れる部材である。図３に特に表れているように、表基材２には、天板２０ａ及び周壁２０ｂを有する箱状の本体部２０が設けられている。 <About the surface base material>
The surface base material 2 is a metal member made of a metal plate, and is a member that appears on the outer surface of the roof when the metal roofing material 1 is placed on the roof base. As particularly shown in FIG. 3, the surface base material 2 is provided with a box-shaped main body portion 20 having a top plate 20a and a peripheral wall 20b.

表基材２の素材である金属板としては、溶融Ｚｎ系めっき鋼板、溶融Ａｌめっき鋼板、溶融Ｚｎ系めっきステンレス鋼板、溶融Ａｌめっきステンレス鋼板、ステンレス鋼板、Ａｌ板、Ｔｉ板、塗装溶融Ｚｎ系めっき鋼板、塗装溶融Ａｌめっき鋼板、塗装溶融Ｚｎ系めっきステンレス鋼板、塗装溶融Ａｌめっきステンレス鋼板、塗装ステンレス鋼板、塗装Ａｌ板又は塗装Ｔｉ板を用いることができる。箱状の本体部２０を形成するとき、鋼板を絞り加工することが好ましい。これは、鋼板を絞り加工することで周壁２０ｂに加工硬化が生じ、金属屋根材１の耐風圧性能を向上できるためである。また、周壁２０ｂを表基材２の周方向に連続する壁面とすることができるためである。 The metal plate used as the material of the table base material 2 includes a molten Zn-based plated steel plate, a molten Al-plated steel plate, a molten Zn-based plated stainless steel plate, a molten Al-plated stainless steel plate, a stainless steel plate, an Al plate, a Ti plate, and a painted molten Zn-based plate. A plated steel plate, a painted molten Al-plated steel plate, a painted molten Zn-based plated stainless steel plate, a painted molten Al-plated stainless steel plate, a painted stainless steel plate, a painted Al plate, or a painted Ti plate can be used. When forming the box-shaped main body 20, it is preferable to draw the steel plate. This is because work hardening occurs on the peripheral wall 20b by drawing the steel plate, and the wind pressure resistance performance of the metal roofing material 1 can be improved. Further, this is because the peripheral wall 20b can be a wall surface continuous in the circumferential direction of the surface base material 2.

図１に表れているように、表基材２の天板２０ａには、幅方向１Ｗに互いに離間して配置された複数の打込位置表示部２１と、各打込表示部２１の周囲に配置された周囲リブ２２とが設けられている。 As shown in FIG. 1, on the top plate 20a of the surface base material 2, a plurality of driving position display units 21 arranged apart from each other in the width direction 1W, and around each driving display unit 21. An arranged peripheral rib 22 is provided.

打込位置表示部２１は、金属屋根材１への緊結部材の打込み位置を示すものである。緊結部材は、例えばビス又は釘等により構成されるものであり、金属屋根材１を屋根下地に緊結するためのものである。本実施の形態の打込位置表示部２１は数ｍｍ以下の開口により構成されている。しかしながら、打込位置表示部２１は、例えば凸部、凹部又は刻設若しくは印刷された記号等、緊結部材の打込み位置を作業者が視覚的又は触覚的に認識できる他の態様を採ることもできる。 The driving position display unit 21 indicates the driving position of the binding member to the metal roofing material 1. The binding member is composed of, for example, screws or nails, and is for binding the metal roofing material 1 to the roof base. The driving position display unit 21 of the present embodiment is configured by an opening of several mm or less. However, the driving position display unit 21 can also adopt another aspect such as a convex portion, a concave portion, or an engraved or printed symbol so that the operator can visually or tactilely recognize the driving position of the binding member. ..

周囲リブ２２は、各打込位置表示部２１を囲うように配置された凸部によって構成されたものである。周囲リブ２２は、上記のように配置された凹部によって構成されていてもよい。各周囲リブ２２は、対応する打込位置表示部２１に緊結部材が打込まれた際の天板２０ａの変形が周囲リブ２２の外部に広がることを抑制する。 The peripheral rib 22 is composed of convex portions arranged so as to surround each driving position display portion 21. The peripheral rib 22 may be composed of recesses arranged as described above. Each peripheral rib 22 suppresses the deformation of the top plate 20a when the binding member is driven into the corresponding driving position display portion 21 from spreading to the outside of the peripheral rib 22.

＜裏基材について＞
裏基材３は、本体部２０の開口を塞ぐように表基材２の裏側に配置された部材である。裏基材３としては、アルミ箔、アルミ蒸着紙、水酸化アルミ紙、炭酸カルシウム紙、樹脂フィルム又はガラス繊維紙等の軽量な素材を用いることができる。これらの軽量な素材を裏基材３に用いることで、金属屋根材１の重量が増大することを回避することができる。 <About the backing material>
The back base material 3 is a member arranged on the back side of the front base material 2 so as to close the opening of the main body portion 20. As the backing material 3, a lightweight material such as aluminum foil, aluminum vapor-deposited paper, aluminum hydroxide paper, calcium carbonate paper, resin film, or glass fiber paper can be used. By using these lightweight materials for the backing material 3, it is possible to avoid an increase in the weight of the metal roofing material 1.

＜芯材について＞
芯材４は、例えば発泡樹脂等により構成されるものであり、本体部２０と裏基材３との間に充填されている。芯材４の素材としては、特に制限が無く、ウレタンフォーム、フェノールフォーム、イソシアヌレートフォーム等を用いることができる。ただし、屋根材においては不燃認定材料を使用することが必須となる。不燃材料認定試験は、ＩＳＯ５６６０−１コーンカロリーメーター試験法に準拠した発熱性試験が実施される。芯材４となる発泡樹脂が発熱量の多いウレタンフォームなどの場合は、芯材４の厚みを薄くしたり、発泡樹脂に無機発泡粒子を含有させたりすることができる。本体部２０と裏基材３との間に発泡樹脂が充填されることで、樹脂シート等の裏打ち材を表基材２の裏側に張り付ける態様よりも、表基材２の裏面に芯材４を強固に密着させることができ、雨音性、断熱性及び耐踏み潰れ性等の屋根材に求められる性能を向上させることができる。 <About core material>
The core material 4 is made of, for example, a foamed resin, and is filled between the main body portion 20 and the back base material 3. The material of the core material 4 is not particularly limited, and urethane foam, phenol foam, isocyanurate foam, or the like can be used. However, it is essential to use non-combustible certified materials for roofing materials. The non-combustible material certification test is a heat generation test based on the ISO5660-1 cone calorimeter test method. When the foamed resin to be the core material 4 is urethane foam or the like having a large calorific value, the thickness of the core material 4 can be reduced, or the foamed resin can contain inorganic foamed particles. By filling the foam resin between the main body 20 and the back base material 3, the core material is attached to the back surface of the front base material 2 rather than the backing material such as a resin sheet is attached to the back side of the front base material 2. 4 can be firmly adhered to each other, and the performance required for the roofing material such as rain noise property, heat insulating property and trampling resistance can be improved.

＜板状補強部材について＞
各板状補強部材５は、図１及び図２に示すように平面視矩形の長手状の板状部材であり、金属屋根材１の幅方向１Ｗに互いに離間するとともに、長手方向５Ｌが金属屋根材１の奥行方向１Ｄに延在するように芯材４にそれぞれ埋め込まれている。各板状補強部材５は、裏基材３及び芯材４よりも高強度の板材である。金属屋根材１の裏側、すなわち本体部２０の開口部分及び裏基材３部分は、本体部２０の天板２０ａ部分と比較して強度が低い。各板状補強部材５が芯材４に埋め込まれることで、金属屋根材１の裏側が補強されている。 <About plate-shaped reinforcing members>
As shown in FIGS. 1 and 2, each plate-shaped reinforcing member 5 is a rectangular plate-shaped member having a rectangular shape in a plan view. Each of the core materials 4 is embedded so as to extend in the depth direction 1D of the material 1. Each plate-shaped reinforcing member 5 is a plate material having higher strength than the back base material 3 and the core material 4. The back side of the metal roofing material 1, that is, the opening portion of the main body portion 20 and the back base material 3 portion has lower strength than the top plate 20a portion of the main body portion 20. The back side of the metal roofing material 1 is reinforced by embedding each plate-shaped reinforcing member 5 in the core material 4.

本実施の形態の板状補強部材５は、金属屋根材１の裏側をより確実に補強するため、図４に示すように基板部５０と補強リブ５１とを有する非平板体によって構成されている。 The plate-shaped reinforcing member 5 of the present embodiment is composed of a non-flat body having a substrate portion 50 and reinforcing ribs 51 as shown in FIG. 4 in order to more reliably reinforce the back side of the metal roofing material 1. ..

基板部５０は、図１及び図２に示すように板状補強部材５が芯材４に埋め込まれているときに金属屋根材１の幅方向１Ｗ及び奥行方向１Ｄに延在する平面視矩形の平板部である。基板部５０が本体部２０の天板２０ａよりも裏基材３に近い位置に配置されることで、より確実に金属屋根材１の裏側が補強される。 As shown in FIGS. 1 and 2, the substrate portion 50 has a rectangular shape in a plan view extending in the width direction 1W and the depth direction 1D of the metal roofing material 1 when the plate-shaped reinforcing member 5 is embedded in the core material 4. It is a flat plate part. By arranging the substrate portion 50 closer to the back base material 3 than the top plate 20a of the main body portion 20, the back side of the metal roofing material 1 is more reliably reinforced.

補強リブ５１は、図１及び図２に示すように板状補強部材５が芯材４に埋め込まれているときに、基板部５０から表基材２の本体部２０の高さ方向２Ｈ（図３参照）に延出されるとともに、金属屋根材１の奥行方向１Ｄに延在されるものである。板状補強部材５がこのような補強リブ５１を有することで、板状補強部材５の長手方向５Ｌの両端５ａを互いに近づけるような曲げに対する板状補強部材５の剛性を増大することができる。そして、このような板状補強部材５が図１及び図２に示すように芯材４に埋め込まれていることで、屋根下地に緊結された金属屋根材１の軒側端部１ｅ（図１及び図２参照）を持ち上げるような曲げに対する金属屋根材１の剛性を増大でき、金属屋根材の耐風圧性能を向上できる。 As shown in FIGS. 1 and 2, when the plate-shaped reinforcing member 5 is embedded in the core material 4, the reinforcing rib 51 is 2H in the height direction from the substrate portion 50 to the main body portion 20 of the surface base material 2 (FIG. 3), and the metal roofing material 1 is extended in the depth direction 1D. When the plate-shaped reinforcing member 5 has such a reinforcing rib 51, it is possible to increase the rigidity of the plate-shaped reinforcing member 5 against bending such that both ends 5a of the plate-shaped reinforcing member 5 in the longitudinal direction 5L are brought close to each other. Then, by embedding such a plate-shaped reinforcing member 5 in the core material 4 as shown in FIGS. 1 and 2, the eaves side end portion 1e of the metal roofing material 1 tightly connected to the roof base (FIG. 1). The rigidity of the metal roofing material 1 against bending such as lifting (see FIG. 2) can be increased, and the wind pressure resistance performance of the metal roofing material can be improved.

板状補強部材５は、表基材２の打込位置表示部２１の下方に位置している。打込位置表示部２１が表示する位置に正しく打ち込まれた緊結部材は、表基材２及び板状補強部材５の上下２枚の板材を貫通して屋根下地に到達する。すなわち、表基材２及び板状補強部材５は緊結部材によって一体化される。これら表基材２及び板状補強部材５が緊結部材によって一体化されることで、金属屋根材１の耐風圧性能がより確実に向上される。 The plate-shaped reinforcing member 5 is located below the driving position display portion 21 of the surface base material 2. The binding member correctly driven to the position displayed by the driving position display unit 21 penetrates the upper and lower two plate members of the surface base material 2 and the plate-shaped reinforcing member 5 and reaches the roof base. That is, the surface base material 2 and the plate-shaped reinforcing member 5 are integrated by the binding member. By integrating the surface base material 2 and the plate-shaped reinforcing member 5 with the binding member, the wind pressure resistance performance of the metal roofing material 1 is more reliably improved.

補強リブ５１の数は任意であるが、本実施の形態の板状補強部材５は一対の補強リブ５１を有している。本実施の形態の補強リブ５１は板状補強部材５の長手方向５Ｌの全体に延在しているが、補強リブは板状補強部材の長手方向の一部に延在されていてもよい。 Although the number of reinforcing ribs 51 is arbitrary, the plate-shaped reinforcing member 5 of the present embodiment has a pair of reinforcing ribs 51. The reinforcing rib 51 of the present embodiment extends in the entire longitudinal direction 5L of the plate-shaped reinforcing member 5, but the reinforcing rib may extend in a part of the plate-shaped reinforcing member in the longitudinal direction.

例えば平板状の基板部に別の板材を接合する等して補強リブ５１を一枚の壁体によって構成してもよいが、本実施の形態の補強リブ５１は、図５に特に示すように先端５１０ａが互いに接続された一対の壁体５１０によって構成されている。一対の壁体５１０の先端５１０ａが互いに接続されていることで、これら一対の壁体５１０が一体として、板状補強部材５の長手方向５Ｌの両端５ａを互いに近づけるような曲げに対する耐力壁となり、より確実に金属屋根材１の剛性を増大できる。本実施の形態では各壁体５１０の先端５１０ａが互いに直接接続されている。しかしながら、他の板部を介して一対の壁体５１０の先端５１０ａを互いに接続してもよい。 For example, the reinforcing rib 51 may be formed of a single wall body by joining another plate material to the flat plate-shaped substrate portion, but the reinforcing rib 51 of the present embodiment is particularly shown in FIG. The tip 510a is composed of a pair of wall bodies 510 connected to each other. Since the tips 510a of the pair of wall bodies 510 are connected to each other, the pair of wall bodies 510 are integrated to form a bearing wall against bending such that both ends 5a of the plate-shaped reinforcing member 5 in the longitudinal direction 5L are brought close to each other. The rigidity of the metal roofing material 1 can be increased more reliably. In the present embodiment, the tips 510a of the wall bodies 510 are directly connected to each other. However, the tips 510a of the pair of wall bodies 510 may be connected to each other via other plate portions.

一対の壁体５１０の先端５１０ａが互いに接続されているとき、それら一対の壁体５１０の基端５１０ｂを隣接させてもよいが、それら一対の壁体５１０の基端５１０ｂを互いに離間させることが好ましい。すなわち、補強リブ５１を断面Ｖ字状又は断面コ字状の突状体とすることが好ましい。金属屋根材１は、例えば屋根妻に配置するとき等に切断されることがある。一対の壁体５１０の基端５１０ｂが互いに離間されていることで、金属屋根材１を切断する際の切断負荷を小さく抑えることができる。 When the tips 510a of the pair of wall bodies 510a are connected to each other, the base ends 510b of the pair of wall bodies 510 may be adjacent to each other, but the base ends 510b of the pair of wall bodies 510 may be separated from each other. preferable. That is, it is preferable that the reinforcing rib 51 has a V-shaped cross section or a U-shaped cross section. The metal roofing material 1 may be cut, for example, when it is placed on a roof wife. Since the base ends 510b of the pair of wall bodies 510 are separated from each other, the cutting load when cutting the metal roofing material 1 can be suppressed to a small size.

図５に示すように、基板部５０が裏基材３に接し、補強リブ５１の先端が表基材２の裏面２３に接していることが好ましい。基板部５０及び補強リブ５１がこのように構成されることで、金属屋根材１の上に太陽光発電モジュールや固定架台等の重量物が積載されるときに、板状補強部材５を介して積載荷重を屋根下地に逃がすことができ、表基材２が変形する可能性を長期間低減できる。 As shown in FIG. 5, it is preferable that the substrate portion 50 is in contact with the back base material 3 and the tip of the reinforcing rib 51 is in contact with the back surface 23 of the front base material 2. When the substrate portion 50 and the reinforcing rib 51 are configured in this way, when a heavy object such as a photovoltaic power generation module or a fixed frame is loaded on the metal roofing material 1, the plate-shaped reinforcing member 5 is used. The load can be released to the roof base, and the possibility of deformation of the surface base material 2 can be reduced for a long period of time.

このような金属屋根材１では、金属屋根材１の奥行方向１Ｄに延在する補強リブ５１を有する複数の長手状の板状補強部材５が、金属屋根材１の幅方向１Ｗ（軒方向）に互いに離間するとともに、長手方向５Ｌが金属屋根材１の奥行方向１Ｄ（軒棟方向）に延在するように芯材４にそれぞれ埋め込まれているので、屋根下地に緊結された金属屋根材１の軒側端部１ｅを持ち上げるような曲げに対する金属屋根材１の剛性を増大できる。これにより、金属屋根材１の耐風圧性能を向上できる。 In such a metal roofing material 1, a plurality of longitudinal plate-shaped reinforcing members 5 having reinforcing ribs 51 extending in the depth direction 1D of the metal roofing material 1 are 1W (eave direction) in the width direction of the metal roofing material 1. The metal roofing material 1 is tightly bound to the roof base because it is separated from each other and embedded in the core material 4 so that the longitudinal direction 5L extends in the depth direction 1D (eave building direction) of the metal roofing material 1. It is possible to increase the rigidity of the metal roofing material 1 against bending such as lifting the eaves side end portion 1e of the roof material 1. Thereby, the wind pressure resistance performance of the metal roofing material 1 can be improved.

また、補強リブ５１には先端５１０ａが互いに接続された一対の壁体５１０が設けられているので、より確実に金属屋根材１の剛性を増大できる。 Further, since the reinforcing rib 51 is provided with a pair of wall bodies 510 having tips 510a connected to each other, the rigidity of the metal roofing material 1 can be increased more reliably.

さらに、一対の壁体５１０の基端５１０ｂが互いに離間されているので、基端５１０ｂを隣接させる場合と比較して金属屋根材１を切断する際の切断負荷を小さく抑えることができる。 Further, since the base ends 510b of the pair of wall bodies 510 are separated from each other, the cutting load when cutting the metal roofing material 1 can be suppressed to be small as compared with the case where the base ends 510b are adjacent to each other.

さらにまた、基板部５０が裏基材３に接し、補強リブ５１の先端が表基材２の裏面２３に接しているので、金属屋根材１が屋根下地の上に配置されているときに表基材２が作業者に踏まれたとしても、表基材２が変形する可能性を低減できる。 Furthermore, since the substrate portion 50 is in contact with the back base material 3 and the tip of the reinforcing rib 51 is in contact with the back surface 23 of the front base material 2, the front surface is when the metal roofing material 1 is arranged on the roof base material. Even if the base material 2 is stepped on by an operator, the possibility that the surface base material 2 is deformed can be reduced.

１金属屋根材
２表基材
３裏基材
４芯材
５板状補強部材
５０基板部
５１補強リブ
５１０壁体 1 Metal roofing material 2 Front base material 3 Back base material 4 Core material 5 Plate-shaped reinforcing member 50 Board part 51 Reinforcing rib 510 Wall body

Claims

A front base material made of a metal plate and having a box-shaped main body portion, a back base material arranged on the back side of the front base material so as to close the opening of the main body portion, and the main body portion and the back base material. A metal roofing material that is provided with a core material filled between the roofs and is arranged on the roof base so that the width direction extends toward the eaves of the roof and the depth direction extends toward the eaves of the roof. And
Further provided with a plurality of longitudinal plate-shaped reinforcing members embedded in the core material so as to be separated from each other in the width direction and to extend in the longitudinal direction in the depth direction.
The plate-shaped reinforcing member is
The substrate portion extending in the width direction and the depth direction and
It has a reinforcing rib extending from the substrate portion in the height direction of the main body portion and extending in the depth direction.
Metal roofing material.

The reinforcing rib is provided with a pair of wall bodies whose tips are connected to each other.
The metal roofing material according to claim 1.

The base ends of the pair of walls are separated from each other.
The metal roofing material according to claim 2.

The substrate portion is in contact with the backing substrate,
The tip of the reinforcing rib is in contact with the back surface of the front base material.
The metal roofing material according to any one of claims 1 to 3.