JP2005000939A

JP2005000939A - Method of manufacturing metallic shingle for curved lateral covering roof

Info

Publication number: JP2005000939A
Application number: JP2003165573A
Authority: JP
Inventors: Tadao Tamura; 忠夫田村
Original assignee: TAMURA SOKEN KK
Current assignee: TAMURA SOKEN KK
Priority date: 2003-06-10
Filing date: 2003-06-10
Publication date: 2005-01-06

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a metallic shingle unit 20 which is used for the construction of a curved lateral covering roof and which has a different front width W for each roofing level. <P>SOLUTION: After notches 11 are formed to a metallic sheet 10 with a prescribed pitch p on both width direction sides along the longitudinal direction of the metallic sheet 10, both width direction sides are roll-formed to prepare a bent or folded-back part 12, a flat part 13 and a folded part 15. Then, with the notches 11 as a reference, the metallic sheet 10 is cut off into individual parts 16 to form U-shaped parts which are folded back 18R, 18L by bending the edge along the detaching line. The bent or folded-back part 12 is used as the eaves end engaging part 21 that is engaged with the eaves end engaging part 23 of a beam end metallic shingle unit 20; the flat part 13 is used as the installation seat 22 for installing the metallic shingle unit 20 in the roof base; the folded part 15 is used as the eaves end engaging part 23 that is engaged with the eaves end engaging part 21 of the eaves end metallic shingle unit 20; and the U-shaped parts which are folded back 18R, 18L are used as restraining pieces 24R, 24L to be mounted on a joint B. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【技術分野】
【０００１】
本発明は、フラットな横葺き屋根に内アール，外アール等の曲線で変化をつけた横葺き屋根に使用される金属屋根板を製造する方法に関する。
【背景技術】
【０００２】
金属屋根は、比較的軽量であるため下地の骨組み構造体に加わる負荷が小さく、釘やビスで簡単に敷設できることから、一般家屋，公共施設等の各種建築物に適用されている。金属屋根板を横葺きする工法では、所定サイズに成形された単位金属屋根板を軒側から野地板に釘，ビス，ボルト等で固定した後、軒側金属屋根板の棟側端部に棟側金属屋根板の軒側端部を噛み合わせながら軒−棟方向に葺き上げている。
【０００３】
横葺き屋根は、屋根一面にフラットな状態で金属屋根板が敷き詰められるため、単調で印象の薄い屋根に仕上がりやすい。フラットな屋根面にアクセントをつけるため、軒−棟方向に延びる複数の化粧瓦棒を横葺き屋根に取り付ける工法（特許文献１）や、屋根面に曲線をつけながら横葺き屋根を構築する工法等が一部で採用されている。
【特許文献１】特開平９−１９５４５０号公報
【０００４】
曲面をつけた横葺き屋根の構築では、所定の曲率で屋根基礎を形成することは勿論、金属屋根板単体としても設計曲面に対応する形状に成形する必要がある。ところが、内アールの横葺き屋根構造では軒側に向けて広がるテーパをつけた金属屋根板，外アールの横葺き屋根構造では棟側に向けて広がるテーパをつけた金属屋根板を使用する場合、金属屋根板単体の形状が多岐にわたる。その結果、施工現場の状況に対する自由度が狭く、所定個所に敷設される金属屋根板の選択に支障をきたし、格段に複雑な施工作業が要求され、施工コストの上昇を招く。
【０００５】
そこで、本発明者は、各段に敷設された金属屋根板単体の間にできる隙間を軒側と棟側で変えることにより内アールや外アールをつける工法を開発し、別途出願した。たとえば、内アールをつけた横葺き屋根では、ｎ段に敷設される金属屋根板単体Ａ_ｎ，ｍと隣り合う金属屋根板単体Ａ_{ｎ，ｍ＋１}との間にできる隙間Ｇが軒側で広く棟側で狭くなるように屋根基礎に固着された継手Ｂに装着する（図１）。その結果、金属屋根板単体Ａの軒側端面が所定のアールに沿って配置される。外アールをつけた横葺き屋根では、金属屋根板単体Ａ_ｎ，ｍ，Ａ_{ｎ，ｍ＋１}間の隙間Ｇを軒側で狭く棟側で広く設定する。
【０００６】
金属屋根板単体Ａは、通常の金属屋根板と同様に継手Ｂに挿し込まれる係止片１Ｒ，１Ｌが間口方向両側に、軒側係合部２，棟側係合部３が軒−棟方向両側に形成され、棟側係合部３から棟側にフラットな取付け座４が延びている（図２）。軒側係合部２を軒側金属屋根板単体Ａの棟側係合部３に、棟側係合部３を棟側金属屋根板単体Ａの軒側係合部２に嵌め合いながら、釘，ビス，リベット等で取付け座４を屋根基礎に打ち付けることにより軒−棟方向に沿って多段に金属屋根板単体Ａが敷設される。
【０００７】
内アール，外アール等の曲線上に金属屋根板単体Ａを配置して横葺き屋根を構築する工法では、軒，棟に向かってアールの曲率が変わるため、金属屋根板単体Ａの働き面５の間口方向幅Ｗを段数ごとに変える必要がある。たとえば、内アールをつけた横葺き屋根（図１）では、ｎ段目用の金属屋根板単体Ａ_ｎ，ｍに比較して働き面５の間口方向幅Ｗが狭い金属屋根板単体Ａ_{ｎ＋１，ｍ}をｎ＋１段目に使用する。各段間で間口方向幅Ｗの差は、内アール，外アールのサイズにもよるが２〜１０ｍｍの間に設定される。
【０００８】
軒−棟方向に沿った段数ごとに間口方向幅Ｗを変える必要があるため、曲線付き横葺き屋根用金属屋根板の製造には、金属切板の折曲げ加工によって金属屋根板を製造する従来法を単純に適用できない。しかも、アールの中心に近づくほど曲率が大きくなるので、働き面５の間口方向幅Ｗが狭くなった金属屋根板単体Ａを必要とする。
【０００９】
【発明の開示】
【発明が解決しようとする課題】
【００１０】
本発明は、このような問題を解消すべく案出されたものであり、係止片１Ｒ，１Ｌの形成工程と軒側係合部２，棟側係合部３の形成工程との順番に工夫を加えることにより、間口方向幅Ｗが１００ｍｍ程度に狭められた働き面５をもつ金属屋根板単体Ａでも容易に製造することを目的とする。
【課題を解決するための手段】
【００１１】
本発明は、その目的を達成するため、（１）〜（４）の工程を経て曲線付き横葺き屋根用金属屋根板を製造している。
（１）金属切板の幅方向両側に所定ピッチで切込みを入れるブランキング工程
（２）金属切板の幅方向一側を曲げ加工して折曲げ・折返し部，平坦部を形成し、幅方向他側を折曲げ・折返し部と反対方向に曲げ加工して折曲げ部を形成するロール成形工程
（３）切込みを基準に金属切板を個々のパーツに切り離すカッティング工程
（４）切り離したパーツのエッジ及び切込みで区画される馳せ代を折曲げ部と同じ側に馳折りしてコ字状折返し部を形成する馳折り工程
金属切板に付ける切込みのピッチは、曲線付き横葺き屋根の各段に要求される金属屋根板の間口方向幅に応じ、コ字状折返し部を見込んだ長さに設定される。
【発明の効果】
【００１２】
切込みを入れた金属切板の幅方向両側に棟側係合部，軒側係合部となる折曲げ・折返し部，折曲げ部を形成した後で、金属切板を個々のパーツに切り離し、切離し線に沿って馳折りしコ字状折返し部を形成しているので、間口方向幅が異なる金属屋根板単体であっても同様な作業手順で製造される。また、切込みのピッチを変えることによって、曲線付き横葺き屋根の各段に要求される間口方向幅をもつ複数の金属屋根板単体を金属切板から製造できる。
【発明を実施するための最良の形態】
【００１３】
本発明に従った金属屋根板単体Ａの製造工程を図３に示す。
ブランキング工程（ａ→ｂ）
所定長さＬの金属切板１０（ブランク）を用意し（ａ）、金属切板１０の長手方向に所定ピッチｐで切込み１１を入れる。切込み１１は、切込み１１に沿って金属切板１０を個々の金属屋根板単体２０に切り離したとき、両側に馳せ代１７Ｒ，１７Ｌができる形状に設定されている。
【００１４】
切込み１１は、ブランキングマシンに金属切板１０を送り込み、所定位置に至った金属切板１０をダイスで受けながらポンチを下降させることにより形成されるが、通常の打抜き加工が採用可能であるため詳細な説明は省略する。ただし、ブランキングマシンに送り込まれる金属切板１０の送込み量がピッチｐに等しくなるように、位置センサで金属切板１０の特定位置が設定位置に達したとき、ストッパを金属切板１０に当接させて金属切板１０の移動を規制する。
切込み１１のピッチｐは、一定値に限らず、目標とする金属屋根板単体２０の間口方向幅Ｗに応じて異ならせても良い。異なるピッチｐ_１，ｐ_２で切込み１１を付けると、一枚の金属切板１０から間口方向幅Ｗが異なる複数の金属屋根板単体２０が得られる（図４）。
【００１５】
ロール成形工程（ｃ）
金属切板１０に切込み１１をつけた後、金属屋根板単体２０の棟側端部に当る部分（図３では上方部）をロール成形する。ロール成形では、上方部を金属切板１０の中央側に一旦折り曲げた後、曲げ部を更に上方に折り返し平坦部を上方に延ばし、平坦部上縁を折り返す。折曲げ・折返し部１２が金属屋根板単体２０（図５）の棟側係合部２１に、平坦部１３が取付け座２２になる。平坦部１３の折り返された上縁１４は、金属切板１０のエッジを内側に収めると共に、取付け座２２の平坦形状を確保することにも働く。
【００１６】
また、折曲げ・折返し部１２と反対側に当る金属切板１０の部分（図３では下方部）をロール成形する。下方部のロール成形では、折曲げ・折返し部１２と反対方向に下方部を折り曲げる。折曲げ部１５は、金属屋根板単体２０の軒側係合部２３になる。折曲げ部１５の成形には、折曲げ・折返し部１２，平坦部１３の成形と同時のロール成形或いは時期をずらしたロール成形が採用される。
折曲げ・折返し部１２，折曲げ部１５は、軒側金属屋根板単体２０の棟側係合部２１に棟側金属屋根板単体２０の軒側係合部２３が強固に噛み合わされるように、折曲げ・折返し部１２の途中に***部を付け、該***部に対応する凹窪部を折曲げ部１５の途中に付けた形状が好ましい。
【００１７】
カッティング工程（ｄ）
次いで、切込み１１を基準に金属切板１０を個々のパーツ１６に切り離す。切り離されたパーツ１６は、切込み１１で区画された馳せ代１７Ｒ，１７Ｌを両側に備えている。
【００１８】
馳せ折り工程（ｅ）
パーツ１６の馳せ代１７Ｒ，１７Ｌを折曲げ部１５と同じ方向に曲げ、曲げ部を更に内側に平坦曲げしてコ字状の折返し部１８Ｒ，１８Ｌを形成する（図５）。コ字状折返し部１８Ｒ，１８Ｌは、金属屋根板単体２０を継手Ｂに装着する際に継手Ｂの係合部Ｂ_１（図２）に挿し込まれる係止片２４Ｒ，２４Ｌとなる。
コ字状折返し部１８Ｒ，１８Ｌ又は係止片２４Ｒ，２４Ｌの成形には、たとえば図６に示す馳折り装置３０が使用される。図６は、２枚のパーツ１６を同時に馳折りする装置を示しているが、更に多数のパーツ１６を同時成形する装置にも改良できる。
【００１９】
馳折り装置３０は、パーツ１６が載置される複数の台座３１を設け、台座３１の一側に折曲げ部１５が当接するガイド３２を、反対側に折曲げ・折返し部１２が収容される溝３３を備えている。台座３１の奥行き方向に突当て定規３４が配置されている。ガイド３２は、馳折りするパーツ１６の幅に応じて溝３３までの距離を調節できるように台座３１上の所定位置に固着されている。或いは、馳折り装置３０の間口方向に沿って平行移動可能にガイド３２を組み込むこともできる。
【００２０】
折曲げ・折返し部１２が溝３３に入り折曲げ部１５がガイド３２に接触しながらパーツ１６が台座３１上を奥行き方向に移動するので、馳せ代１７Ｒ，１７Ｌの先端を突当て定規３４に突き当てたとき、台座３１上でパーツ１６が正確に位置決めされる。
突当て定規３４に突き当てられた馳せ代１７Ｒ，１７Ｌに臨む位置に、成形ブレード３５が配置されている。成形ブレード３５は、回転曲板３６と一体的に矢印方向に回転し、馳せ代１７Ｒを折り曲げ、更にコ字状折返し部１８Ｒに曲げ加工する。他方の馳せ代１７Ｌをコ字状折返し部１８Ｌに曲げ加工する工程では、パーツ１６を他方の台座３１（図６では右上）に移し、同様な手順でパーツ１６を位置決めした後、成形ブレード３５を矢印方向に回転させる。
【００２１】
図６の馳折り装置３０では、手作業によってパーツ１６を所定位置に送り込んでいるが、パーツ１６の送込みを自動化することも可能である。この場合、適宜のフィーダでパーツ１６を台座３１上に送り込み、馳せ代１７Ｒ，１７Ｌの先端が突当て定規３４に接触した時点でフィーダを駆動停止させ、成形ブレード３５を回転させる。コ字状折返し部１８Ｒを成形する台座３１からコ字状折返し部１８Ｌを成形する台座３１へのパーツ１６の移動も、同様に自動化できる。
【００２２】
このように、金属切板１０に所定ピッチｐで切込み１１を付け、ロール成形後に馳折りすることにより、必要とする間口方向幅Ｗをもつ複数の金属屋根板単体２０が一枚の金属切板１０から得られる。金属屋根板単体２０の間口方向幅Ｗは切込み１１のピッチｐで自由に変えることができ、間口方向幅Ｗの狭いパーツ１６であっても係止片２４Ｒ，２４Ｌを支障なく成形できる。したがって、内アールや外アールをつけた横葺き屋根の各段に必要とされるサイズの金属屋根板単体２０が容易に製造される。
【産業上の利用可能性】
【００２３】
以上に説明したように、本発明によるとき、間口方向幅Ｗを自由に変えた金属屋根板単体２０が製造される。内アール，外アール等の曲線を間口方向につけた横葺き屋根の構築に金属屋根板単体２０を使用すると、横葺き屋根のフラットな屋根面が呈する平凡な印象が間口方向の曲線で解消され、従来の横葺き屋根に比較して極めて識別性の高い屋根面となる。
【図面の簡単な説明】
【図１】内アールをつけた横葺き屋根の平面図
【図２】同横葺き屋根に使用される金属屋根板単体を継手に装着する説明図
【図３】曲線付き横葺き屋根用金属屋根板の製造工程を説明するフロー図
【図４】異なるピッチで切込みを入れた金属切板から曲線付き横葺き屋根用金属屋根板を製造するフロー図
【図５】馳折り工程の説明図
【図６】馳折り装置の概略図
【符号の説明】
１０：金属切板１１：切込み１２：折曲げ・折返し部１３：平坦部
１４：上縁１５：折曲げ部１６：パーツ１７Ｒ，１７Ｌ：馳せ代
１８Ｒ，１８Ｌ：コ字状折返し部
２０：金属屋根板単体２１：棟側係合部２２：取付け座２３：軒側係合部２４Ｒ，２４Ｌ：係止片
Ａ：金属屋根板単体Ｂ：継手Ｗ：間口方向幅【Technical field】
[0001]
The present invention relates to a method of manufacturing a metal roof plate used for a horizontal roof in which a flat side roof is changed with a curve such as an inner radius or an outer radius.
[Background]
[0002]
Since metal roofs are relatively lightweight, the load applied to the underlying framework structure is small, and they can be easily laid with nails and screws, and thus are applied to various buildings such as ordinary houses and public facilities. In the method of laying a metal roof slab, a unit metal roof slab of a predetermined size is fixed from the eave side to a base plate with nails, screws, bolts, etc. It is rolled up in the eave-building direction while meshing with the eaves side edge of the side metal roof plate.
[0003]
The horizontal roof is flat and flat with metal roof boards, so it is easy to finish a monotonous and thin roof. To accentuate the flat roof surface, a method of attaching a plurality of decorative tiles extending in the eave-ridge direction to the side roof (Patent Document 1), a method of building a side roof while curving the roof surface, etc. Has been adopted in part.
[Patent Document 1] JP-A-9-195450
In the construction of a horizontal roof with a curved surface, it is necessary to form the roof foundation with a predetermined curvature, as well as to form a metal roof plate as a single shape corresponding to the design curved surface. However, when using a metal roof with a taper that spreads toward the eaves in the inner roof structure of Inner R, and a metal roof with a taper that extends toward the ridge in the outer roof structure of Outer Ear, The shape of a single metal roof plate is diverse. As a result, the degree of freedom with respect to the situation of the construction site is narrow, and the selection of a metal roof plate laid at a predetermined location is hindered, and a remarkably complicated construction work is required, resulting in an increase in construction cost.
[0005]
Therefore, the present inventor has developed a method of applying an inner radius and an outer radius by changing the gap formed between the metal roof plates laid on each stage on the eaves side and the ridge side, and has filed a separate application. For example, in a horizontal roof with an inner radius, there is a wide gap G on the eaves side between a single metal roof plate An _{n, m} laid in n steps and an adjacent metal roof plate An _{n, m + 1.} It attaches to the joint B fixed to the roof foundation so as to narrow on the side (FIG. 1). As a result, the eaves side end face of the metal roof plate simplex A is arranged along a predetermined radius. In a horizontal roof with an outer radius, the gap G between the metal roof plates alone _{An, m} , _{An, m + 1 is} set narrow on the eave side and wide on the ridge side.
[0006]
In the metal roof plate A alone, the locking pieces 1R and 1L to be inserted into the joint B in the same manner as a normal metal roof plate are on both sides in the frontage direction, and the eaves side engaging portion 2 and the ridge side engaging portion 3 are eave-building. Flat mounting seats 4 are formed on the ridge side from the ridge side engaging portion 3 (FIG. 2). While fitting the eaves side engaging portion 2 to the eaves side engaging portion 3 of the eaves side metal roof plate A and the ridge side engaging portion 3 to the eave side engaging portion 2 of the ridge side metal roof plate alone A, The metal roof plate A is laid in multiple stages along the eave-ridge direction by driving the mounting seat 4 against the roof foundation with screws, rivets or the like.
[0007]
In the construction method in which the side roof is constructed by placing the metal roof plate A on the curved lines such as the inner radius and the outer radius, the curvature of the radius changes toward the eaves and ridges. It is necessary to change the frontage direction width W for each number of steps. For example, in a horizontal roof with an inner radius (FIG. 1), a single metal roof plate An _{n + 1, the} width W of the working surface 5 is narrower than the single metal roof plate An _{n, m} for the n-th stage _{. m} is used in the (n + 1) th stage. The difference in the frontage direction width W between each stage is set between 2 and 10 mm, although it depends on the size of the inner radius and the outer radius.
[0008]
Since it is necessary to change the width W in the frontage for each number of steps along the eaves-ridge direction, a metal roof plate is manufactured by bending a metal cut plate in the manufacture of a curved roof metal roof plate. The law cannot simply be applied. Moreover, since the curvature increases as it approaches the center of the radius, the metal roof plate A having a narrow width W in the frontage direction of the work surface 5 is required.
[0009]
DISCLOSURE OF THE INVENTION
[Problems to be solved by the invention]
[0010]
The present invention has been devised to solve such a problem, and in order of the formation process of the locking pieces 1R and 1L and the formation process of the eaves side engagement portion 2 and the ridge side engagement portion 3. By adding a device, an object is to easily manufacture even a single metal roof plate A having a working surface 5 in which the width W in the frontage direction is reduced to about 100 mm.
[Means for Solving the Problems]
[0011]
In order to achieve the object, the present invention manufactures a curved roof metal roof plate through the steps (1) to (4).
(1) Blanking process in which cuts are made at predetermined pitches on both sides in the width direction of the metal cut plate (2) One side in the width direction of the metal cut plate is bent to form a folded / folded portion and a flat portion, and the width direction Roll forming process that forms the bent part by bending the other side in the opposite direction from the folded part (3) Cutting process that separates the metal sheet into individual parts based on the incision (4) Folding process that forms a U-shaped folded part by folding the skin allowance defined by the edge and the notch to the same side as the folded part. According to the width of the metal roof slab required in the above, the length is set to allow for the U-shaped folded portion.
【The invention's effect】
[0012]
After forming the ridge side engagement part, eaves side engagement part folding / folding part, folding part on both sides in the width direction of the cut metal sheet, cut the metal cutting board into individual parts, Since the U-shaped folded portion is formed along the cut-off line, even a single metal roof plate having a different width in the frontage direction is manufactured in the same operation procedure. Also, by changing the pitch of the cuts, a plurality of metal roof plates having a frontage width required for each step of the curved side roof can be manufactured from the metal cut plates.
BEST MODE FOR CARRYING OUT THE INVENTION
[0013]
The manufacturing process of the metal roof board simple substance A according to this invention is shown in FIG.
Blanking process (a → b)
A metal cut plate 10 (blank) having a predetermined length L is prepared (a), and cuts 11 are made at a predetermined pitch p in the longitudinal direction of the metal cut plate 10. The cuts 11 are set in a shape that allows for thinning allowances 17R and 17L on both sides when the metal cut plate 10 is cut into individual metal roof plates 20 along the cuts 11.
[0014]
The cut 11 is formed by feeding the metal cut plate 10 into a blanking machine and lowering the punch while receiving the metal cut plate 10 reaching a predetermined position with a die, but a normal punching process can be adopted. Detailed description is omitted. However, when the specific position of the metal cutting plate 10 reaches the set position by the position sensor so that the feeding amount of the metal cutting plate 10 fed into the blanking machine is equal to the pitch p, the stopper is attached to the metal cutting plate 10. The movement of the metal cutting plate 10 is regulated by abutting.
The pitch p of the notches 11 is not limited to a fixed value, and may be varied according to the width W in the frontage direction of the target metal roof plate 20. When the cuts 11 are made at different pitches p ₁ and p ₂ , a plurality of metal roof plate single bodies 20 having different widths W in the frontage direction are obtained from one metal cut plate 10 (FIG. 4).
[0015]
Roll forming process (c)
After making the notch 11 in the metal cut plate 10, the part (upper part in FIG. 3) which hits the ridge side edge part of the metal roof plate single piece 20 is roll-formed. In roll forming, the upper part is once bent to the center side of the metal sheet 10, the bent part is further folded upward, the flat part is extended upward, and the upper edge of the flat part is folded. The bent / folded portion 12 becomes the ridge side engaging portion 21 of the metal roof plate 20 (FIG. 5), and the flat portion 13 becomes the mounting seat 22. The folded upper edge 14 of the flat portion 13 serves to accommodate the edge of the metal cut plate 10 on the inner side and ensure the flat shape of the mounting seat 22.
[0016]
Moreover, the part (lower part in FIG. 3) of the metal cut plate 10 which hits the opposite side to the bending / folding part 12 is roll-formed. In roll forming of the lower part, the lower part is bent in the direction opposite to the folding / folding part 12. The bent portion 15 becomes an eaves side engaging portion 23 of the metal roof plate 20 alone. For forming the bent portion 15, roll forming at the same time as forming the bent / folded portion 12 and the flat portion 13 or roll forming shifted in time is employed.
The folding / folding portion 12 and the folding portion 15 are configured so that the eaves side engagement portion 23 of the ridge side metal roof plate 20 is firmly engaged with the ridge side engagement portion 21 of the eaves side metal roof plate 20. A shape in which a raised portion is provided in the middle of the bent / folded portion 12 and a concave portion corresponding to the raised portion is provided in the middle of the bent portion 15 is preferable.
[0017]
Cutting process (d)
Next, the metal sheet 10 is cut into individual parts 16 based on the notches 11. The separated parts 16 are provided with skin allowances 17R and 17L defined by the notches 11 on both sides.
[0018]
Skinny folding process (e)
The bending allowances 17R and 17L of the part 16 are bent in the same direction as the bent portion 15, and the bent portion is further bent inward to form U-shaped folded portions 18R and 18L (FIG. 5). The U-shaped folded portions 18R and 18L serve as locking pieces 24R and 24L that are inserted into the engaging portion B ₁ (FIG. 2) of the joint B when the metal roof plate 20 is attached to the joint B.
For forming the U-shaped folded portions 18R, 18L or the locking pieces 24R, 24L, for example, a folding device 30 shown in FIG. 6 is used. Although FIG. 6 shows an apparatus for simultaneously folding two parts 16, the apparatus can be improved to an apparatus for simultaneously molding a large number of parts 16.
[0019]
The folding device 30 is provided with a plurality of pedestals 31 on which the parts 16 are placed, a guide 32 with which the bent portion 15 abuts on one side of the pedestal 31, and a bent / folded portion 12 on the opposite side. A groove 33 is provided. An abutting ruler 34 is arranged in the depth direction of the pedestal 31. The guide 32 is fixed to a predetermined position on the base 31 so that the distance to the groove 33 can be adjusted according to the width of the part 16 to be folded. Alternatively, the guide 32 can be incorporated so as to be movable along the frontage direction of the folding device 30.
[0020]
The parts 16 move in the depth direction on the pedestal 31 while the bent / folded portion 12 enters the groove 33 and the bent portion 15 contacts the guide 32, so that the tips of the skin allowances 17R and 17L hit the abutting ruler 34. When applied, the part 16 is accurately positioned on the pedestal 31.
A molding blade 35 is disposed at a position facing the skin allowances 17R and 17L abutted against the abutting ruler 34. The forming blade 35 rotates integrally with the rotating curved plate 36 in the direction of the arrow, bends the skin allowance 17R, and further bends it into a U-shaped folded portion 18R. In the process of bending the other thin margin 17L into the U-shaped folded portion 18L, the part 16 is moved to the other pedestal 31 (upper right in FIG. 6), and after positioning the part 16 in the same procedure, the molding blade 35 is moved. Rotate in the direction of the arrow.
[0021]
In the folding device 30 of FIG. 6, the parts 16 are manually fed to a predetermined position, but the feeding of the parts 16 can be automated. In this case, the parts 16 are fed onto the pedestal 31 with an appropriate feeder, and when the tips of the skin allowances 17R and 17L come into contact with the abutting ruler 34, driving of the feeder is stopped and the forming blade 35 is rotated. The movement of the part 16 from the pedestal 31 forming the U-shaped folded portion 18R to the pedestal 31 forming the U-shaped folded portion 18L can be similarly automated.
[0022]
In this way, by forming the notches 11 at the predetermined pitch p in the metal cut plate 10 and folding it after roll forming, a plurality of metal roof plate single bodies 20 having a required width W in the frontage direction are made into one metal cut plate. 10 is obtained. The front width W of the metal roof plate 20 can be freely changed by the pitch p of the notches 11, and the locking pieces 24R and 24L can be formed without hindrance even with the part 16 having the narrow front width W. Therefore, the metal roof board 20 of the size required for each step of the side roof with the inner radius and the outer radius is easily manufactured.
[Industrial applicability]
[0023]
As described above, according to the present invention, the metal roof plate simple substance 20 with the frontage direction width W freely changed is manufactured. When the metal roof plate 20 is used to construct a side roof with curved lines such as inner and outer rounds in the frontage direction, the mediocre impression of the flat roof surface of the sided roof is eliminated with the curve in the frontage direction. The roof surface is extremely distinguishable as compared to the conventional side roof.
[Brief description of the drawings]
[Fig. 1] Plan view of side roof with inner radius [Fig. 2] Explanatory drawing of attaching a metal roof plate used for the side roof to the joint [Fig. 3] Curved metal roof for side roof Flow diagram explaining the manufacturing process of the plate [Fig. 4] Flow diagram of manufacturing the metal roof plate for curved side roof from the metal cutting plate cut with different pitches [Fig. 5] Explanatory diagram of the folding process [Fig. 6] Schematic diagram of the folding device [Explanation of symbols]
10: Metal cutting plate 11: Cutting 12: Bending / folding part 13: Flat part 14: Upper edge 15: Bending part 16: Parts 17R, 17L: Skinny 18R, 18L: U-shaped folding part 20: Metal roof Single plate 21: Building side engaging portion 22: Mounting seat 23: Eave side engaging portion 24R, 24L: Locking piece A: Metal roof plate single piece B: Joint W: Frontage width

Claims

（１）〜（４）の工程を経る曲線付き横葺き屋根用金属屋根板の製造方法。
（１）金属切板１０の幅方向両側に所定ピッチｐで切込み１１を入れるブランキング工程
（２）金属切板１０の幅方向一側を曲げ加工して折曲げ・折返し部１２，平坦部１３を形成し、幅方向他側を折曲げ・折返し部１２と反対方向に曲げ加工して折曲げ部１５を形成するロール成形工程
（３）切込み１１を基準に金属切板１０を個々のパーツ１６に切り離すカッティング工程
（４）切り離したパーツ１６のエッジ及び切込み１１で区画される馳せ代１７Ｒ，１７Ｌを折曲げ部１５と同じ側に馳折りしてコ字状折返し部１８Ｒ，１８Ｌを形成する馳折り工程(1) The manufacturing method of the metal roof board for a horizontal roof with a curve which passes through the process of (4).
(1) Blanking step of making cuts 11 at both sides of the metal cut plate 10 in the width direction with a predetermined pitch p (2) Bending one side of the metal cut plate 10 in the width direction to bend / fold back portion 12 and flat portion 13 And forming the bent portion 15 by bending the other side in the width direction in the direction opposite to the folded / folded portion 12 (3). Cutting process (4) to cut into parts The flanges 17R and 17L defined by the edges of the parts 16 and the cuts 11 are folded to the same side as the bent part 15 to form U-shaped folded parts 18R and 18L. Folding process

曲線付き横葺き屋根の各段に要求される金属屋根板の間口方向幅Ｗに応じてピッチｐを変える請求項１記載の製造方法。The manufacturing method according to claim 1, wherein the pitch p is changed according to the width W in the frontage direction of the metal roof plate required for each step of the curved side roof.