JP3628009B2

JP3628009B2 - Disaster prevention tile

Info

Publication number: JP3628009B2
Application number: JP2001231710A
Authority: JP
Inventors: 和彦小栗
Original assignee: ??????; Descente Ltd
Current assignee: ??????; Descente Ltd
Priority date: 2001-07-31
Filing date: 2001-07-31
Publication date: 2005-03-09
Anticipated expiration: 2019-07-29
Also published as: JP2002088980A

Description

【０００１】
【発明の属する技術分野】
本発明は、強風による平板瓦のずれと浮きを防止して耐風性能を向上させると共に、防水性能も併せて向上させる様にした防災瓦に関する。
【０００２】
【従来の技術】
（防災瓦に要請される機能、性能、作用等）
防災瓦に要請される第１番目の機能等は、台風時の強風等による飛散を防止する耐風性能である。
又、耐風性能と同等に要請される第２番目の機能等は、暴風雨時の防水性能にも優秀であることが求められている。
又、平板瓦では施工時に働き長さを調節することも多く、働き長さの調節機能が第３番目の機能等として必要な条件となっている。
即ち、働き長さについては、実際の施工の際、瓦桟ピッチの施工ばらつきが有り、否が応でも働き長さの調節が必要になる。
【０００３】
よって、第３番目の機能である働き方向での移動自在性を確保して、第１番目の機能である強固な連結又は固定性を確保せねばならず、一見相反する機能を同時に満たさねばならなかった。
又、この関係は、第２番目の防水機能と他機能との関係でも同様である。
【０００４】
以下、従来の技術を詳細に説明するが、従来の技術では、耐風性能（第１機能）、防水性能（第２機能）、働き長さの調節機能（第３機能）を全て同時に達成した技術はなかった。
【０００５】
（従来技術１）
従来の防災瓦としては、特開平８ー９３１４１号公報の〔請求項３〕に記載され、本件明細書の図１２乃至図１５に図示された係止耐風厚平形瓦が知られている。
即ち、従来技術１の係止耐風厚平形瓦は、桟覆部ａと差込受部ｂとの同段葺き合わせ部分がほぼ瓦１枚の厚さに納まる葺き合わせ構造をとる厚平形系瓦において、差込受部ｂの頭部ｃ側端に導水帯ｄと水返しｅによって分離されかつ瓦裏面とほぼ同じレベルの表面を有する係止受部ｆを形成し、尻部ｇ側の中央付近に尻切欠部ｈを形成してこの上面部分に瓦表面とほぼ同じかないしはやや高い裏面部分を有する係止突起ｉを形成してなる瓦であって、葺き合わせたとき斜め下段側瓦の係止突起ｉが斜め上段側瓦の係止受部ｆを抑止し振れ止め係止するものであった。
【０００６】
上記従来技術１の係止耐風厚平形瓦では、尻部ｇ係止突起ｉの形成に際して、尻部ｇ側の中央付近に尻切欠部ｈを形成している（従来の製造方法では切欠部が必須であり、この点については後述する）ために、尻部ｈ側縁の水返しｊが、両側部で一直線上であっても中央付近では頭部ｃ側へ変位せざるを得なくなっていた。
その結果、水返しｊが尻部ｇ側縁部で異形状態と成っているため、且つ、尻部ｇ側の水返しｊと平行の内方水返しｋとの間の流水部ｌが異形状態と成るため、更に、中央付近の水返しｊは内方水返しｋと接近したり、重合される上の瓦の頭部ｃと接近して、両者間の距離が短くなるため、上下重合個所から吹き込む逆流雨水を確実に受け止めることが出来なかったり、排水が円滑に行えない場合があり、防水性能が不十分になっていた。
【０００７】
（従来技術１の技術背景）
従来技術１並びにその欠点が尻部ｇ側の中央付近に形成した尻切欠部ｈに起因することを説明したが、尻部ｇ係止突起ｉの形成に尻切欠部ｈの形成が必要であった理由を以下、説明する。
即ち、従来の瓦成形方式は、上下型（金型）が鉛直方向上下に移動して原料を加圧することによって成形していたため、上下方向の中間に空間部が存在する形状（鉤状等）の成形は、空間部を成形する部分形成型が、加圧成形後の金型上昇時に鉤部における空間部の上方成形部に当接し、引っ掛かることになり、鉤部成形は不可能であった。
【０００８】
（従来技術１の課題関連）
以下、従来の防災瓦の第１、２機能である耐風性能と防水性能の関係について説明する。
耐風性能は下の瓦の尻部係合部（係止突起ｉ）で上の瓦の頭部係合部（係止受部ｆ）を押さえることにより、耐風性能を発揮、上昇させているが、風速上昇に、強度風圧にどれだけ耐えられるかは、上下の瓦の係合部の強度に応じて変化する。
従来技術１のものでは、頭部ｃ側の係止受部ｆは導水帯ｄとの連結部が多いが、尻部ｇ側の係止突起ｉの水返しｊとの連結部は立上部ｉ’だけであるため、特に、尻係合部（係止突起ｉ）の強度が充分でないと、強風圧に耐えられずに破壊してしまい、充分な耐風性能が得られない。
そこで、尻係合部（係止突起ｉ）の強度を確保、上昇させるために、尻係合部（係止突起ｉ）における最大荷重負荷部位の断面積を増大することが必要となり、特に頭尻方向（流れ方向）の長さを増大して断面積を増加させることが有効である。
しかしながら、従来技術１のものでは、尻係合部（係止突起ｉ）の下方は全て尻切欠部ｈになっており、係合部の長さを増加することは、尻切欠部ｈの長さを増加することに直結し、延いては、水返しｊの形成位置が尻側から頭側に移動することとなり、上記説明の防水性能が更に低下することとなる。
云い換えると、防水性能については、流れ方向の重合長さが大きいほど防水性能は向上するため、従来技術１の様に尻係合部（係止突起ｉ）の下が尻切欠部ｈになっていると、尻切欠部ｈの長さだけ重合長さが短くなり、防水性能が低下することとなり、尻係合部（係止突起ｉ）が長いほど耐風性能が上昇し、尻切欠部ｈ（係止突起ｉ）が長いほど防水性能が低下すると云う相反する条件を有していた。
従って、従来技術１では耐風性能と防水性能の両方の性能を充足することが出来ず、防災瓦（耐風瓦）は風雨両方に強いことが必要であることを考慮すると、従来技術１では未解決の問題が存在していたと云える。
【０００９】
（従来の技術２）
又、従来の防災瓦としては、特開平８ー９３１４１号公報の〔従来の技術〕に記載され、本件明細書の図１６乃至図１７に図示された耐風厚形平瓦が知られている。
即ち、従来技術２の図１６に示す耐風厚形平瓦は、瓦の差込受部ｍの側端の頭部ｎ寄り先端側に係止突起ｏが、尻部ｐ側縁の中央付近に凹欠部ｑがそれぞれ形成されていて、千鳥葺きに葺き合わせたとき、図１７に示す様に、葺き合わせ上段側の瓦の係止突起ｏが葺き合わせ下段側の瓦の凹欠部ｑ下方に潜入して、瓦の振れ係止と浮き抑止がなされるものであった。
【００１０】
よって、上記従来技術２の耐風厚形平瓦でも、尻部ｐに凹欠部ｑを形成しているため、水返しｒが異形となって、防水性能が不充分となる課題が存在する一方、第３機能である働き長さの調節機能においても課題が存在した。
即ち、従来技術２の防災瓦での働き長さ調節機能については、下の瓦の尻係合部（凹欠部ｑ）が上の瓦の頭係合部（係止突起ｏ）を上から押さえると共に、頭尻方向（流れ方向）で上の瓦が相対的にスライドする構成となっている。
一方、働き長さ調節機能としては、上下係合部の係合面積（重合面積）が一定或いは一定以上でないと、耐風性能を考慮すると、充分な働き長さ調節機能を有しているとは云えない。
従って、従来技術２のものにおける係合方法は、下の瓦の尻係合部（凹欠部ｑ）が上の瓦の頭係合部（係止突起ｏ）を縦方向（上下方向）で押さえる構造になっているため、係合部の長さ分だけは働き長さを調節が出来るとしても、係合面積が一定でなかったり、係合面積が少量（浅く）なった場合は耐風性能に問題が発生する。
【００１１】
【発明が解決しようとする課題】
上記の様に、従来の防災瓦（従来技術１、２）は、第１、２、３機能である耐風性能、防水性能、働き長さ調節機能を全て同時に満たした技術は存在しなかった。
【００１２】
【課題を解決するための手段】
本発明は、上記従来技術に基づく、３機能（耐風、防水、調節機能）を同時に達成出来なかった課題に鑑み、瓦本体の両側端部に葺合時重合される桟及び差込部を形成し、瓦本体の尻側水返しの中央部位を両端部位より幅広とした、瓦本体の表面より高い平面段丘とすると共に、該平面段丘上面の中央付近に、立上部と該立上部から桟側への水平部を連続した、流れ方向に幅広い係合凸部を設けて、該係合凸部の水平部下面と該水平部下面の真下に位置する水返し上面との間に差込空間を形成し、千鳥葺き合わせ時に差込空間に差し込まれることで、その上下位置が規制される係合差込部を差込部における水返しの外側に設け千鳥葺き合わせ時に差込空間に差し込まれることで、その上下位置が規制される係合差込部を差込部における水返しの外側に設け、該係合差込部の上面を差込部の下面より上方としたことによって、３機能を同時に達成して、上記課題を解決する。
【００１３】
又、従来技術の根本原因は製造技術に起因したので、金型には瓦上面の成型面に、瓦上面の係合凸部を形成する凸部形成部を切欠形成すると共に、差込空間を形成する押圧成形部を凸部形成部の後面側を最進行位置として水平方向移動自在に備え、上記金型による成形工程として上下押圧成形し、差込空間に対する押圧成形部を上記最進行位置まで移動させた後に復帰させ、上下型を上下分離する成形方法で、上記係合凸部を成形したことによって、尻側切欠を形成せずに３機能を満たした防災瓦となる。
【００１４】
【発明の実施の形態】
以下、本発明の一実施例を図面に基づいて説明する。
本発明に係る耐風機能を有する平板状の防災瓦１の基本構成にあっては、図１に示す様に、瓦本体２を平面方形状と成している。
そして、図１、２、３に示す様に、瓦本体２の短尺な端部（図１中、前後側）を頭３及び尻４と夫々成し、頭３の先端下部に垂れ５を突設し、瓦本体２の表面において、尻４の手前に一条の水返し６を瓦本体２の横手方向に設けている。
尚、垂れ５の明確な形状は図３に示し、その他の図面では簡略表示と成している。
【００１５】
上述の尻４に設けた水返し６は、図１〜７の実施例のものは、従来技術１のものに比して、決定的に相違している。
即ち、従来技術１のものでは、係止突起ｉを形成するために、水返しｊに尻切欠部ｈを形成せざるを得なかったが、本発明の実施例のものでは、係合凸部16の形成は水返し６（その一部の平面段丘6b）上に一体形成しており、係合凸部16形成付近の水返し６の形状は、その周囲と全く同一と成し、即ち、切欠部を設けたり、寸断せず、一様な平面段丘状或いは突堤状と成しており、これらを本発明では無垢形状の水返し６と称している。
【００１６】
又、瓦本体２の長尺な一端部（図１中、右側）を下方切欠の桟７と成し、他端縁部（図１中、左側）に帯板片を下方側に段差を設けて延出形成して差込部８と成している。
差込部８は、尻４から頭３の近傍に至る長さと、瓦本体２の桟７との重合幅を有しており、表面の長尺端部及び尻４側の端部に沿って鉤状の水返し９を設け、更に、表面中央に水返し突条10を差込部８の長さ方向に設けている。
尚、差込部８の先端部及び差込部８における水返し９の先端部は、垂れ５を形成している関係で明確な形状でなかったり、段差を徐々に減少し、或いは、一部を割愛している。
【００１７】
又、瓦本体２の表面両側端には、尻４の水返し６に連続して、流れ方向に水返し11、11a 及び段丘12、12a を夫々設けているが、葺き合わせ時に漏水しない様にすれば、段丘12、12a 等を割愛しても良い。
又、尻４の水返し６の両端部表面にＶ字状の凹部13、13a と裏面における対応位置に凸部14、14a を設け、更に水返し６及び凹部13の近傍に釘孔15、15a を設けている。
【００１８】
かかる基本構成を有する防災瓦１において、図１〜６に示す様に、耐風機能の構成要件としての係合凸部16と係合差込部17を、尻４の水返し６上面の中央付近と差込部８の側端部に夫々設けている。
即ち、図１、３に示す様に、尻４に設けた水返し６の中央付近（凹部13の形成個所以外）では、水返し６を平面段丘状と成している。
更に、詳細には、瓦本体２の中央部から尻４に向かって、上昇する傾斜面6a及び流れ方向に所定幅を有する平面段丘6bで水返し６を形成し、傾斜面6aが実質的に水返し６と成っている。
そして、図２、５、６に示す様に、水返し６における平面段丘6b上面の中央付近に立上部18と一側（桟７側）への水平部19を連続し、水平部19の下部（水返し６上面と水平部19下面の間）に、係合差込部17を一側（桟７側）から差込自在な差込空間20を有する鉤状の係合凸部16を突出状に設けている。
尚、平面段丘6bは、流れ方向で、両端部の水返し６に比して幅広と成しているために、係合凸部16も水返し６に比して流れ方向で幅広に形成している。
【００１９】
他方、図１、５、６に示す様に、差込部８の側端部に設けた水返し９の先端寄りの一部を内方側に屈曲させ、当該屈曲部21の外側で流れ方向に所定長さの帯板状の係合差込部17を設け、該係合差込部 17 の上面を、図６に示す様に、差込部８の下面より上方としている。
水返し９の屈曲部21の形状は尻４から頭３にかけて、内方傾斜、流れ方向、外方傾斜と成し、屈曲部21は全体的に”〕”かっこ状と成し、上下の誘水傾斜部を上下の係止部22、22a と夫々成している。
言い換えると、上下の係止部22、22a は流れ方向に所定長さを有する係合差込部17の長さを規制している。
【００２０】
【００２１】
次に本発明に係る防災瓦の作用について説明する。
図４に示す様に、多数の防災瓦１を千鳥葺きに葺設した時に、下段の防災瓦1Dの尻４上に上段の防災瓦1Uの頭３が部分的に重合すると共に、各段における隣接した防災瓦1D1 、1D2 は、桟７の下方切欠部に差込部８が差込まれて重合し、両者の段丘12、12a も隣接状態となる。
【００２２】
そして、図５、６に示す様に、横方向に半分ずれた上下段の防災瓦1U、1Dの係合凸部16と係合差込部17の係合部にあっては、下段の防災瓦1Dの係合凸部16の差込空間20に対して上段の防災瓦1Uの係合差込部17を横から差し込んで、両者は係合状態と成り上下位置関係が規制される。
【００２３】
又、係合凸部16と係合差込部17の係合にあっては、係合差込部17は所定長さを有することにより、流れ方向での係合位置は調整可能となる。
更に、係合凸部16と係合差込部17の流れ方向位置関係が調整可能であるとしても、係合差込部17の流れ方向上下位置に上下の係止部22、22a が夫々存在し、係合凸部16が当接自在であるために、その調整量は制限されるが、離脱せずに流れ方向での係合状態は確保される。
【００２４】
又、横方向に隣接した防災瓦1D1 、1D2 の接合部にあっては、両者の水返し11、11a 、段丘12、12a の接合個所の隙間から流入した雨水は、差込部８上に流水する。
雨水が多量で流水速度が速くても、差込部８中央に突出形成した水返し突条10で減速されると共に、側端縁の水返し９で制止され、頭３側に流水する。
そして、差込部８上の流水の一部は、係合差込部17の形成個所において、水返し９に連続した屈曲部21の上方の係止部22で誘導され円滑に下方へ流水する。
【００２５】
尚、水返し11、11a 、段丘12、12a の形成個所に対応して、防災瓦１の裏面には葺き合わせ対応位置に切欠凹部23を設けて治まりを向上させている。
【００２６】
次に、複数の防災瓦１の荷造重合状態について説明する。
図７に示す様に、複数の防災瓦１を荷姿状態の同一位置で重ね合わせる時には、係合凸部16は表面側に上方突出状態と成っているが、係合凸部16を上面に形成する平面段丘6bは傾斜面6aの段差を介して瓦本体２より高く成っているため、平面段丘6bの下方が係合凸部16の収納切欠24に成っている。
【００２７】
次に、本発明と従来技術１の決定的な相違（尻切込部の有無）に関して、本発明の構成が可能となった理由、即ち、成形方法について説明する。
図８は防災瓦１を加圧成形する金型の断面図、図９は係合凸部16の形成個所の要部を示す金型の拡大断面図で、(a) は上下型32、33による押圧成型状態を示し、(b) は差込空間20の原料を排除し鉤状の係合凸部16を成形する状態を示し、図１０は上型における係合凸部16形成個所の凹設状態を示す側面図であり、図１１は２段階の成形状態を示す模式図で、(a) は金型30のキャビティ31に投入される原料を示し、(b) は上下型32、33による押圧成形体を示し、(c) は押圧成形部37が進行途中状態で係合凸部16に差込空間20を形成している中間状態を示し、(d) は差込空間20を側部に有する鉤状の係合凸部16の形成完了状態を示している。
金型30は原料投入空間であるキャビティ31を形成する上下型32、33（側枠を含む）から成り、図示のものでは下型33は防災瓦１の裏面を成形し、上型32は防災瓦１の表面及び係合凸部16の差込空間20を含む全体を成形し、係合凸部16の形成個所において、差込空間20を成形する部分形成型34を配置している。
即ち、上型32の所定個所に差込空間20を含む係合凸部16を形成する略台形状の凸部形成部35を切欠形成し、該凸部形成部35の外側に下型33から延出した外部形成部36（側枠の一部）を設置している。
又、凸部形成部35の外部形成部36の外側に配置した部分形成型34に、差込空間20に相当する形状の押圧成形部37をシリンダー37a で、凸部形成部35方向に進退自在に配置している。
更に、上型32における凸部形成部35の形成面の一部であって、凸部形成部35に臨んだ差込空間20対応位置の奥方に凹部38を凹設し、該凹部38の下側をキャビティ31に臨む様に開口している。
即ち、部分形成型34の押圧成形部37が凸部形成部35内に進行した位置の前方に凹部38が形成されている。
尚、従って、金型30の成型面は、上下型32、33の上下成型面、側枠の内面、凸部形成部35及び凹部38の内面、外部形成部36の内面が相当すると共に、部分形成型34における押圧成形部37の先端も、金型30の成型面の一部を構成することになる。
【００２８】
次に、かかる構成の金型30による成形方法を説明する。
先ず、図１１(b) 、図９(a) に示す様に、キャビティ31に投入された原料を上下型32、33の上下押圧成形により、キャビティ31と凸部形成部35（凹部38を含む）の原料で、瓦本体２と差込空間20を含んだ係合凸部16を一体成形する。
次に、図１１(c) 、(d) 、図９(b) に示す様に、上下型32、33による押圧成型状態を維持したまま、シリンダー37a の作動により、成型面の一部である部分形成型34の押圧成形部37を凸部形成部35に進行させ、該凸部形成部35における差込空間20の位置の原料を押圧排除して、差込空間20が存在する立上部18と水平部19から成る鉤状の係合凸部16を成形する。
尚、かかる鉤状の係合凸部16の成形時に、差込空間20相当位置に存在した原料は、成形品における立上部18、水平部19、金型30内におけるキャビティ31（瓦本体２の水返し６）及び凹部38側に移動し、瓦本体２の水返し６、立上部18と水平部19からなる係合凸部16を一体形成している。
そして、差込空間20を有した係合凸部16の部分成形後に、押圧成形部37を後退させた後、上下型32、33を上下分離して成形を完了することにより、係合凸部16を損壊させず、且つ、従来に比して水返し６に悪影響を与えず無垢形状で形成する。
尚、図９(b) に示す様に、部分形成型34の押圧成形部37の最進行位置を、凹部38の前面側と略面一位置と成せば、係合凸部16の周囲に若干のバリが発生するとしても、成形後の乾燥時にバリは自然的に分離される。
【００２９】
【発明の効果】
要するに本発明は、瓦本体２の両側端部に葺合時重合される桟７及び差込部８を形成すると共に、瓦本体２の尻４側水返し６の中央部位を両端部位より幅広とした、瓦本体２の表面より高い平面段丘とすると共に、該平面段丘上面の中央付近に、立上部18と該立上部18から桟７側への水平部19を連続した、流れ方向に幅広い係合凸部16を設けて、該係合凸部16の水平部19下面と該水平部19下面の真下に位置する水返し６上面との間に差込空間20を形成し、千鳥葺き合わせ時に差込空間20に差し込まれることで、その上下位置が規制される係合差込部17を差込部８における水返し９の外側に設け、該係合差込部 17 の上面を差込部８の下面より上方としたので、実質的に水返し６の主要部となる傾斜面6aは、瓦本体２及び平面段丘6bと円滑な連結となるために、水返し６を高く形成することが出来て防水性能を向上させることが出来、又係合凸部16を設ける平面段丘6bは突堤の水返し６に比して幅広と成すことが出来るため、幅広な平面段丘6b上に設ける係合凸部16も流れ方向に幅広と成すことが出来、従って、係合凸部16の断面積を増加して第１機能である耐風性能を向上することが出来る。
【００３０】
又、千鳥葺き時の上下斜め方向に位置する防災瓦 1U 、 1D が係合状態となり、強風等に対する耐風機能（第１機能）を発現し防災瓦１の浮き、ズレを防止することが出来る。
又、係合凸部 16 を設ける瓦本体２の尻４側水返し６は瓦本体２の尻４側に異形状態でないために、侵入雨水の遮断、防水性能（第２機能）を充分に発揮することが出来る。
又、係合凸部 16 は桟７側から差込自在な差込空間 20 を有する鉤状のものと成したので、下段の防災瓦 1D に対する上段の防災瓦 1U の長れ方向位置が所定量調整自在と成ることにより、上下段の瓦の連結状態を維持しつつ、第３機能である瓦の働き長さを調節して施工の容易化を図ることが出来る。
従って、本発明によれば、第１、２、３機能である耐風性能、防水性能、働き長さ調節機能を全て満足して、防災瓦として非常に実用的価値を有する。
【００３１】
又、金型 30 には瓦上面の成型面に、瓦上面の係合凸部 16 を形成する凸部形成部 35 を切欠形成すると共に、差込空間 20 を形成する押圧成形部 37 を凸部形成部 35 の後面側を最進行位置として水平方向移動自在に備え、上記金型 30 による成形工程として上下押圧成形し、差込空間 20 に対する押圧成形部 37 を上記最進行位置まで移動させた後に復帰させ、上下型 32 、 33 を上下分離する成形方法で、上記係合凸部 16 を成形すれば、係合凸部 16 と瓦本体２は一体であるために強度性が損なわれず、又特殊形状（鉤状）の一体成形も、尻側切欠を形成せずに簡易に行うことが出来る成形方法で、桟７側へ水平部 19 を突出させた係合凸部 16 を成形出来る。
【００３２】
又、係合差込部 17 は流れ方向に所定長さを有すると共に、係合差込部 17 の流れ方向上下位置に上下の係止部 22 、 22a を夫々設ければ、下段の防災瓦 1D に対して上段の防災瓦 1U が調整自在であっても、係合凸部 16 と係止部 22 、 22a は当接自在関係であるために、下方３側からの強風、或いは渦巻風が作用しても、上段の防災瓦 1U が離脱することなく、耐風機能を確実化することが出来る。
【００３３】
又、平面段丘6bの裏面下方を、荷姿重合時の係合凸部16の収納切欠24と成せば、荷姿に多数の防災瓦１を重合した時に、平面段丘6bの表面から突出した係合凸部16は平面段丘6b裏面の収納切欠24に収まり、荷姿時の全体容積を増大させることが無く、運搬を容易とすることが出来る等その実用的効果甚だ大である。
【図面の簡単な説明】
【図１】本発明に係る防災瓦の平面図である。
【図２】図１の正面図である。
【図３】図１の側面図である。
【図４】防災瓦の千鳥葺きを示す平面図である。
【図５】千鳥葺き時の耐風係合部を示す拡大平面図である。
【図６】図５の要部断面図である。
【図７】重合させた荷姿を示す図である。
【図８】金型の断面図である。
【図９】係合凸部形成個所の金型要部の拡大断面図である。
【図１０】上型における係合凸部形成個所の要部拡大側面図である。
【図１１】係合凸部の成形状態を示す模式図である。
【図１２】従来技術１の係止耐風厚平形瓦の斜視図である。
【図１３】図１２の瓦の葺き合わせ平面図である。
【図１４】図１３の葺き合わせ要部斜視図である。
【図１５】図１３の葺き合わせ要部Ａ−Ａ断面図である。
【図１６】従来技術２の耐風厚平形瓦の斜視図である。
【図１７】図１６の瓦の葺き合わせ要部斜視図である。
【符号の説明】
２瓦本体
４尻
６水返し
6b 平面段丘
７桟
８差込部
９水返し
16 係合凸部
17 係合差込部
18 立上部
19 水平部
20 差込空間
30 金型
32 上型
33 下型
35 凸部形成部
37 押圧成形部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disaster prevention tile that prevents the flat roof tile from being displaced and lifted by strong winds to improve wind resistance and also improves waterproof performance.
[0002]
[Prior art]
(Function, performance, action, etc. required for disaster prevention tiles)
The first function required for disaster prevention tiles is wind resistance that prevents scattering due to strong winds during typhoons.
In addition, the second function and the like that are required to be equivalent to the wind resistance performance are required to have excellent waterproof performance in a storm.
In addition, in the case of flat roof tiles, the working length is often adjusted during construction, and the function for adjusting the working length is a necessary condition as the third function.
That is, with respect to the working length, there is a variation in the construction of the roof tile pitch during actual construction, and it is necessary to adjust the working length even if it is not.
[0003]
Therefore, the mobility in the working direction, which is the third function, must be secured, the strong connection or fixing property, which is the first function, must be secured, and the seemingly conflicting functions must be satisfied at the same time. There was no.
This relationship is the same in the relationship between the second waterproof function and other functions.
[0004]
In the following, the conventional technology will be described in detail, but in the conventional technology, the wind resistance performance (first function), waterproof performance (second function), and working length adjustment function (third function) are all achieved at the same time. There was no.
[0005]
(Prior art 1)
As a conventional disaster prevention roof tile, there is a known wind resistant flat roof tile described in [Claim 3] of JP-A-8-93141 and shown in FIGS. 12 to 15 of this specification.
That is, the wind resistant thick flat roof tile of the prior art 1 is a thick flat roof tile that has a stacked structure in which the stepped portion of the pier covering portion a and the insertion receiving portion b is accommodated in the thickness of one roof tile. The hook receiving part b is formed at the end on the head c side of the insertion receiving part b by a water guiding band d and a water return e and having a surface at substantially the same level as the back surface of the roof tile, A roof tile formed by forming a notch h in the vicinity thereof and forming a locking projection i having a back surface portion that is substantially the same as or slightly higher on the top surface of the top surface. The locking protrusions i of the upper side restrain the locking receiving portion f of the upper tile on the oblique side and prevent it from swinging.
[0006]
In the conventional wind resistant thick flat roof tile of prior art 1, when the bottom g locking projection i is formed, a bottom notch h is formed in the vicinity of the center on the bottom g side (in the conventional manufacturing method, the notch is not cut). This is essential, and this point will be described later). For this reason, the water return j on the side edge of the butt h side has to be displaced toward the head c side near the center even if it is straight on both sides. .
As a result, the water return j is in a deformed state at the butt g side edge, and the water flowing portion l between the water return j on the butt g side and the parallel inner water return k is in a deformed state. Therefore, the water return j near the center approaches the inner water return k or approaches the head c of the upper tile to be polymerized, and the distance between the two becomes shorter. The backflow rainwater blown from the water could not be received reliably, or the drainage could not be performed smoothly, and the waterproof performance was insufficient.
[0007]
(Technical background of prior art 1)
Although the prior art 1 and the drawbacks thereof have been described due to the bottom notch h formed near the center on the bottom g side, the bottom notch h needs to be formed in order to form the bottom g locking projection i. The reason will be described below.
That is, in the conventional roof tile forming method, since the upper and lower molds (molds) are formed by moving the material up and down in the vertical direction and pressurizing the raw material, the shape having a space portion in the middle in the vertical direction (such as a bowl shape) In this molding, the part forming mold for molding the space part was brought into contact with and caught by the upper molding part of the space part in the collar part when the mold was raised after pressure molding, and the collar part molding was impossible. .
[0008]
(Related to the problems of prior art 1)
Hereinafter, the relationship between wind resistance performance and waterproof performance, which are the first and second functions of conventional disaster prevention tiles, will be described.
Wind resistance performance is enhanced and raised by pressing the upper tile head engaging portion (locking receiving portion f) with the bottom tile bottom engaging portion (locking protrusion i). How much the wind speed can withstand the high wind pressure varies depending on the strength of the engaging portions of the upper and lower roof tiles.
In the prior art 1, the locking receiving portion f on the head c side has many connecting portions with the water guide band d, but the connecting portion with the water return j of the locking projection i on the butt g side is the upright portion i. In particular, unless the strength of the buttocks engaging portion (locking protrusion i) is sufficient, the wind does not withstand strong wind pressure and breaks, and sufficient wind resistance performance cannot be obtained.
Therefore, in order to secure and raise the strength of the buttocks engaging portion (locking protrusion i), it is necessary to increase the cross-sectional area of the maximum load load portion in the buttocks engaging portion (locking protrusion i). It is effective to increase the cross-sectional area by increasing the length in the buttocks direction (flow direction).
However, in the prior art 1, all the bottom of the bottom engaging portion (locking protrusion i) is a bottom notch h, and increasing the length of the engaging portion is the length of the bottom notch h. This is directly connected to the increase of the height, and as a result, the formation position of the water return j moves from the butt side to the head side, and the waterproof performance described above further decreases.
In other words, as the waterproof performance increases as the polymerization length in the flow direction increases, the bottom of the bottom engaging portion (locking protrusion i) becomes the bottom notch h as in the prior art 1. If this is the case, the polymerization length will be shortened by the length of the bottom notch h, and the waterproof performance will be reduced. The longer the bottom engaging portion (locking projection i), the higher the wind resistance, and the bottom notch h The longer the (locking protrusion i), the more contradictory conditions were that the waterproof performance was reduced.
Therefore, considering that the conventional technology 1 cannot satisfy both wind resistance and waterproof performance, and the disaster prevention tile (wind resistant tile) needs to be strong against both wind and rain, the conventional technology 1 is unsolved. It can be said that this problem existed.
[0009]
(Conventional technology 2)
Moreover, as a conventional disaster prevention roof tile, it is described in [Prior Art] of JP-A-8-93141, and a wind resistant thick roof tile shown in FIGS. 16 to 17 of the present specification is known.
That is, the wind-resistant thick flat roof tile shown in FIG. 16 of the prior art 2 has a locking projection o on the front end side near the head n at the side end of the tile insertion receiving portion m, near the center of the edge portion p side edge. When the concave notches q are formed, and when strung together in a zigzag manner, as shown in FIG. 17 , the engaging projections o of the tiles on the upper side of the mating are aligned below the notches q of the tile on the lower side of the mating. Infiltrating the roof, the tiles were locked and prevented from floating.
[0010]
Therefore, even in the wind resistant thick flat roof tile of the above prior art 2, since the recessed portion q is formed in the bottom portion p, there is a problem that the water return r becomes irregular and the waterproof performance is insufficient. There was also a problem in the function of adjusting the working length, which is the third function.
That is, with regard to the function of adjusting the working length of the disaster prevention roof tile according to the prior art 2, the bottom tile bottom engaging portion (recessed portion q) is located above the roof top engaging portion (locking protrusion o). The upper roof tile is relatively slid in the head-bottom direction (flow direction).
On the other hand, as the working length adjustment function, if the engagement area (overlapping area) of the upper and lower engagement parts is not constant or not less than a certain value, considering the wind resistance performance, it has a sufficient working length adjustment function. I can't say that.
Therefore, the engagement method in the prior art 2 is such that the bottom tile bottom engaging portion (recessed portion q) has the upper tile head engaging portion (locking projection o) in the vertical direction (vertical direction). Even though the working length can be adjusted by the length of the engagement part, the windproof performance can be achieved if the engagement area is not constant or the engagement area is small (shallow). Problems occur.
[0011]
[Problems to be solved by the invention]
As described above, the conventional disaster prevention tiles (conventional techniques 1 and 2) did not have a technique that satisfies all of the first, second, and third functions of wind resistance performance, waterproof performance, and working length adjustment function at the same time.
[0012]
[Means for Solving the Problems]
In view of the problem that the three functions (wind resistance, waterproofing, adjustment function) based on the above-mentioned prior art could not be achieved at the same time, the present invention forms a crosspiece and an insertion portion that are polymerized at the both ends of the tile body. The center part of the bottom side water return of the tile body is wider than the both end parts, and it is a flat terrace higher than the surface of the tile body, and in the vicinity of the center of the upper surface of the flat terrace, from the upright and from the upright to the pier side A wide engaging convex part is provided in the flow direction that is continuous with the horizontal part, and an insertion space is formed between the lower surface of the engaging convex part and the upper surface of the water return located immediately below the lower surface of the horizontal part. And, by inserting into the insertion space at the time of staggering, the engagement insertion part whose vertical position is regulated is provided outside the water return at the insertion part, and it is inserted into the insertion space at the time of staggering , The engagement insertion part whose vertical position is regulated is returned to the water in the insertion part. Provided outside, by the upper surface of the engaging insertion portion and the upper lower surface of the insertion portion, to achieve 3 functions simultaneously, to solve the above problems.
[0013]
In addition, since the root cause of the prior art is due to the manufacturing technology, the mold has a notch formed on the molding surface of the roof surface of the roof, and a protrusion forming portion for forming an engaging protrusion on the roof surface of the roof tile, and an insertion space. The press forming part to be formed is provided so as to be movable in the horizontal direction with the rear surface side of the convex part forming part as the most advanced position, and is vertically pressed as a molding process by the mold, and the press forming part for the insertion space is moved to the most advanced position. By forming the engagement convex portion by a molding method in which the upper and lower molds are separated into upper and lower parts by moving them back after being moved, a disaster prevention tile satisfying three functions is formed without forming a butt-side notch.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the basic configuration of the flat disaster prevention roof tile 1 having wind resistance function according to the present invention, as shown in FIG. 1, the roof tile body 2 has a planar shape.
As shown in FIGS. 1, 2, and 3, the short end portion (front and rear sides in FIG. 1) of the roof tile body 2 is formed with the head 3 and the buttocks 4, respectively, and the drooping 5 protrudes from the lower end of the head 3. In addition, on the surface of the tile body 2, a single water return 6 is provided in front of the bottom 4 in the transverse direction of the tile body 2.
Note that the clear shape of the sag 5 is shown in FIG. 3, and is simplified in other drawings.
[0015]
As for the water return 6 provided in the above-mentioned bottom 4, the thing of the Example of FIGS.
That is, in the conventional art 1, in order to form the locking projection i, but had to form a butt notch h in water flashing j, those embodiments of the present invention, the engaging projection The formation of 16 is integrally formed on the water return 6 (a part of the flat terrace 6b), and the shape of the water return 6 in the vicinity of the formation of the engaging convex portion 16 is exactly the same as its surroundings, that is, A cut-off portion is not provided or is not cut off, and is formed into a uniform flat terrace shape or a jetty shape. These are referred to as a solid water return 6 in the present invention.
[0016]
Moreover, the long one end part (right side in FIG. 1) of the roof tile body 2 is formed as a lower cut-off bar 7 and a strip is provided on the other end edge part (left side in FIG. 1) with a step on the lower side. And is formed as an insertion portion 8.
The insertion portion 8 has a length from the bottom 4 to the vicinity of the head 3 and a width of overlap with the crosspiece 7 of the roof tile body 2, along the long end of the surface and the end on the bottom 4 side. A bowl-shaped water return 9 is provided, and a water return protrusion 10 is provided in the center of the surface in the length direction of the insertion portion 8.
In addition, the front-end | tip part of the insertion part 8 and the front-end | tip part of the water return 9 in the insertion part 8 are not a clear shape by the relationship which forms the droop 5, or a level | step difference is reduced gradually, or one part Is omitted.
[0017]
Moreover, water return 11, 11a and terraces 12, 12a are respectively provided in the flow direction in the both ends of the front surface of the roof tile 2 in order to prevent water leakage. If so, the terraces 12 and 12a may be omitted.
Further, V-shaped concave portions 13 and 13a are provided on the surface of both ends of the water return 6 of the bottom 4 and convex portions 14 and 14a are provided at corresponding positions on the back surface, and nail holes 15 and 15a are provided in the vicinity of the water return 6 and the concave portion 13. Is provided.
[0018]
In the disaster prevention tile 1 having such a basic configuration, as shown in FIGS. 1 to 6, the engagement convex portion 16 and the engagement insertion portion 17 as the component requirements of the wind resistance function are arranged near the center of the top surface of the water return 6 of the bottom 4. And are provided at the side end portions of the insertion portion 8, respectively.
That is, as shown in FIGS. 1 and 3, in the vicinity of the center of the water return 6 provided on the butt 4 (other than the portion where the recess 13 is formed), the water return 6 has a planar terrace shape.
More specifically, a water return 6 is formed by an inclined surface 6a rising from the center of the roof tile 2 toward the tail 4 and a flat terrace 6b having a predetermined width in the flow direction, and the inclined surface 6a is substantially formed. It consists of water return 6.
As shown in FIGS. 2, 5, and 6, the upright part 18 and the horizontal part 19 on one side (the cross 7 side) are connected to the vicinity of the center of the upper surface of the flat terrace 6 b in the water return 6, and the lower part of the horizontal part 19 A hook-like engagement convex portion 16 having an insertion space 20 into which the engagement insertion portion 17 can be inserted from one side (the crosspiece 7 side) protrudes (between the upper surface of the water return 6 and the lower surface of the horizontal portion 19). It is provided in the shape.
Since the flat terrace 6b is wider in the flow direction than the water return 6 at both ends, the engaging projection 16 is also formed wider in the flow direction than the water return 6. ing.
[0019]
On the other hand, as shown in FIGS. 1, 5, and 6, a part near the tip of the water return 9 provided at the side end of the insertion portion 8 is bent inward, and the flow direction is outside the bent portion 21. Is provided with a band-like engagement insertion portion 17 having a predetermined length, and the upper surface of the engagement insertion portion 17 is located above the lower surface of the insertion portion 8 as shown in FIG.
The shape of the bent portion 21 of the water return 9 is inwardly inclined, flowing direction, outwardly inclined from the bottom 4 to the head 3, and the bent portion 21 is generally “]” bracketed, and is raised and lowered. The water inclined portions are formed as upper and lower locking portions 22 and 22a, respectively.
In other words, the upper and lower locking portions 22 and 22a regulate the length of the engagement insertion portion 17 having a predetermined length in the flow direction.
[0020]
[0021]
Next, the operation of the disaster prevention tile according to the present invention will be described.
As shown in FIG. 4, when a large number of disaster prevention tiles 1 are installed in a staggered manner, the head 3 of the upper disaster prevention tile 1U partially overlaps with the bottom 4 of the lower disaster prevention tile 1D, and at each stage Adjacent disaster prevention roof tiles 1D1 and 1D2 are polymerized with the insertion portion 8 inserted into the lower notch of the crosspiece 7, and the terraces 12 and 12a of both are also adjacent.
[0022]
As shown in FIGS. 5 and 6, the lower-stage disaster prevention tiles 16 </ b> U and 1 </ b> D of the upper and lower-stage disaster prevention roof tiles 1 </ b> U and 1 </ b> D are engaged with the engagement protrusions 16 and the engagement plugs 17. By inserting the engagement insertion portion 17 of the upper disaster prevention roof tile 1U from the side into the insertion space 20 of the engagement convex portion 16 of the roof tile 1D, both are engaged and the vertical positional relationship is restricted.
[0023]
Further, in the engagement between the engagement convex portion 16 and the engagement insertion portion 17, the engagement insertion portion 17 has a predetermined length, so that the engagement position in the flow direction can be adjusted.
Further, even if the positional relationship in the flow direction between the engagement convex portion 16 and the engagement insertion portion 17 can be adjusted, there are upper and lower locking portions 22, 22a at the upper and lower positions in the flow direction of the engagement insertion portion 17, respectively. However, since the engagement convex portion 16 is freely abuttable, the adjustment amount is limited, but the engagement state in the flow direction is ensured without detachment.
[0024]
In addition, at the junction of the disaster prevention tiles 1D1 and 1D2 adjacent in the horizontal direction, rainwater flowing in from the gap between the junctions of water return 11, 11a, terraces 12 and 12a flows on the plug 8 To do.
Even if the amount of rainwater is large and the flowing water speed is high, it is decelerated by the water return ridge 10 protruding from the center of the insertion portion 8 and is stopped by the water return 9 on the side edge, and flows to the head 3 side.
Then, a part of the flowing water on the insertion portion 8 is guided by the engaging portion 22 above the bent portion 21 continuous with the water return 9 and smoothly flows downward at the place where the engagement insertion portion 17 is formed. .
[0025]
Corresponding to the locations where the water return 11, 11a and terraces 12, 12a are formed, the rear surface of the disaster prevention roof tile 1 is provided with a notch recess 23 at a position corresponding to the mating to improve healing.
[0026]
Next, the packing polymerization state of the plurality of disaster prevention tiles 1 will be described.
As shown in FIG. 7, when the plurality of disaster prevention roof tiles 1 are overlapped at the same position in the packaged state, the engaging convex portion 16 is in an upward projecting state on the surface side. Since the planar terrace 6b to be formed is higher than the roof tile body 2 through the step of the inclined surface 6a, the lower side of the planar terrace 6b is a storage notch 24 of the engaging convex portion 16.
[0027]
Next, regarding the decisive difference between the present invention and the prior art 1 (whether there is a butt cut portion), the reason why the configuration of the present invention is possible, that is, the molding method will be described.
FIG. 8 is a cross-sectional view of a mold for pressure-molding the disaster prevention tile 1, FIG. 9 is an enlarged cross-sectional view of a mold showing the main part of the formation portion of the engagement convex portion 16, and (a) is an upper and lower mold 32, 33. (B) shows a state in which the raw material of the insertion space 20 is removed and the hook-like engagement convex part 16 is formed, and FIG. 10 shows the concave part of the upper mold where the engagement convex part 16 is formed. FIG. 11 is a schematic view showing a two-stage molding state . FIG. 11A is a schematic view showing a raw material put into the cavity 31 of the mold 30, and FIG. (C) shows an intermediate state in which the press-molding portion 37 is in the process of being advanced and the insertion protrusion 20 is formed in the engagement convex portion 16, and (d) shows the insertion space 20 on the side. The state where the hook-shaped engagement convex part 16 formed in the part is formed is shown.
The mold 30 is composed of upper and lower molds 32 and 33 (including side frames) that form a cavity 31 that is a raw material charging space. In the illustrated example, the lower mold 33 molds the back surface of the disaster prevention tile 1 and the upper mold 32 is disaster prevention. The entire surface including the surface of the roof tile 1 and the insertion space 20 of the engaging convex portion 16 is formed, and a partial forming die 34 for forming the insertion space 20 is disposed at a place where the engaging convex portion 16 is formed.
That is, a substantially trapezoidal convex portion forming portion 35 that forms the engaging convex portion 16 including the insertion space 20 is cut out at a predetermined position of the upper die 32, and the lower die 33 is formed outside the convex portion forming portion 35. An extended external forming part 36 (a part of the side frame) is installed.
In addition, a press-molding portion 37 having a shape corresponding to the insertion space 20 can be moved forward and backward in the direction of the convex portion forming portion 35 with a cylinder 37a on the partial forming die 34 arranged outside the external forming portion 36 of the convex portion forming portion 35. Is arranged.
Further, a concave portion 38 is formed in a part of the surface of the upper mold 32 where the convex portion forming portion 35 is formed and is located at the back of the position corresponding to the insertion space 20 facing the convex portion forming portion 35. An opening is made so that the side faces the cavity 31.
That is, the concave portion 38 is formed in front of the position where the press molding portion 37 of the partial forming die 34 has advanced into the convex portion forming portion 35.
Accordingly, the molding surface of the mold 30 corresponds to the upper and lower molding surfaces of the upper and lower molds 32 and 33, the inner surface of the side frame, the inner surfaces of the convex portion forming portion 35 and the concave portion 38, and the inner surface of the outer forming portion 36. The tip of the press molding part 37 in the forming die 34 also constitutes a part of the molding surface of the mold 30.
[0028]
Next, a molding method using the mold 30 having such a configuration will be described.
First, as shown in FIGS. 11 (b) and 9 (a), the raw material put into the cavity 31 is vertically pressed by the upper and lower molds 32 and 33 to form the cavity 31 and the convex portion forming portion 35 (including the concave portion 38). ), The engaging convex portion 16 including the roof tile body 2 and the insertion space 20 is integrally formed.
Next, as shown in FIGS. 11 (c), 11 (d), and 9 (b), the cylinder 37a is operated to maintain a part of the molding surface while maintaining the press molding state by the upper and lower molds 32 and 33. The press forming part 37 of the partial forming die 34 is advanced to the convex part forming part 35, the raw material at the position of the insertion space 20 in the convex part forming part 35 is pressed out, and the upright part 18 where the insertion space 20 exists And a hook-like engagement convex portion 16 composed of the horizontal portion 19 is formed.
The raw material present at the position corresponding to the insertion space 20 at the time of molding of the hook-shaped engaging convex portion 16 is the rising portion 18 in the molded product, the horizontal portion 19, and the cavity 31 in the mold 30 (of the roof tile 2). It moves to the side of the water return 6) and the concave portion 38, and the water return 6 of the roof tile body 2, the engaging convex portion 16 comprising the upright portion 18 and the horizontal portion 19 are integrally formed.
Then, after partial molding of the engaging convex portion 16 having the insertion space 20, the pressing convex portion 37 is retracted, and then the upper and lower molds 32, 33 are separated vertically to complete the molding, whereby the engaging convex portion It is formed in a solid shape without damaging 16 and without adversely affecting the water return 6 as compared with the conventional case.
As shown in FIG. 9B, if the most advanced position of the press forming portion 37 of the partial forming die 34 is substantially flush with the front side of the concave portion 38, the engagement convex portion 16 is slightly surrounded. Even if such burrs are generated, the burrs are naturally separated during drying after molding.
[0029]
【The invention's effect】
In short, the present invention forms the crosspiece 7 and the insertion portion 8 that are polymerized at the both end portions of the tile body 2 and makes the center portion of the bottom 4 side water return 6 of the tile body 2 wider than both end portions. A flat terrace that is higher than the surface of the roof tile body 2, and the vertical portion 18 and a horizontal portion 19 extending from the vertical portion 18 to the crosspiece 7 side are connected in the vicinity of the center of the flat terrace, and the engagement is wide in the flow direction. A protrusion 16 is provided to form an insertion space 20 between the lower surface of the horizontal portion 19 of the engaging protrusion 16 and the upper surface of the water return 6 located directly below the lower surface of the horizontal portion 19. An engagement insertion portion 17 whose vertical position is regulated by being inserted into the insertion space 20 is provided outside the water return 9 in the insertion portion 8, and the upper surface of the engagement insertion portion 17 is arranged on the insertion portion 8. since the upper than the lower surface of the inclined surface 6a which is substantially the major portion of the water flashing 6 was a smooth connection and tile main body 2 and the flat terraces 6b In addition, the water return 6 can be formed higher and the waterproof performance can be improved, and the flat terrace 6b provided with the engaging projection 16 can be made wider than the water return 6 of the jetty. The engaging projection 16 provided on the wide flat terrace 6b can also be wide in the flow direction, and therefore the cross-sectional area of the engaging projection 16 can be increased to improve the wind resistance performance as the first function. I can do it.
[0030]
Moreover, the disaster prevention tiles 1U and 1D positioned in the diagonally up and down directions at the time of staggering are brought into an engaged state, exhibiting a wind-resistant function (first function) against strong winds and the like, and the prevention roof 1 can be prevented from floating and shifting.
In addition, the bottom 4 side water return 6 of the tile body 2 provided with the engaging projections 16 is not deformed on the bottom 4 side of the tile body 2, so that the intrusion rainwater blocking and waterproof performance (second function) are sufficiently exhibited. I can do it.
Further, since the engaging convex portion 16 is formed as a bowl having an insertion space 20 that can be inserted from the crosspiece 7 side , the longitudinal direction position of the upper disaster prevention roof tile 1U with respect to the lower disaster prevention roof tile 1D is a predetermined amount. By being adjustable, it is possible to facilitate the construction by adjusting the working length of the tile, which is the third function, while maintaining the connected state of the upper and lower tiles.
Therefore, according to the present invention, the wind resistance performance, waterproof performance, and work length adjustment function, which are the first, second, and third functions, are all satisfied, and it has a very practical value as a disaster prevention tile.
[0031]
Further, the mold 30 has a notch formed on the molding surface of the roof surface of the roof tile , forming a projection portion 35 that forms the engaging projection 16 on the roof surface of the roof tile, and a pressing molding portion 37 that forms the insertion space 20 on the projection surface. The rear surface side of the forming portion 35 is provided as the most advanced position so as to be movable in the horizontal direction, and as a molding process by the mold 30 , the upper and lower press molding is performed, and the press molding portion 37 for the insertion space 20 is moved to the most advanced position. If the engaging projection 16 is formed by the molding method in which the upper and lower dies 32 and 33 are separated from each other by reverting , the engaging projection 16 and the roof tile body 2 are integrated so that the strength is not impaired. The integral projection of the shape (saddle shape) can also be performed by a molding method that can be easily performed without forming the butt-side notch, and the engaging convex portion 16 in which the horizontal portion 19 protrudes toward the crosspiece 7 can be formed.
[0032]
In addition, the engagement plug 17 has a predetermined length in the flow direction, and if the upper and lower locking portions 22 and 22a are respectively provided at the upper and lower positions in the flow direction of the engagement plug 17 , the lower disaster prevention tile 1D Even if the upper disaster prevention roof tile 1U is adjustable , the engagement convex portion 16 and the locking portions 22 , 22a are in a freely contactable relationship, so that strong winds or swirl winds from the lower 3 side act. Even so, the wind-proof function can be ensured without the upper disaster prevention tile 1U separating.
[0033]
Further, the rear surface below the plane terraces 6b, if not receiving notch 24 and configuration of the engaging projection 16 at the time of packing the polymerization, when the polymerization numerous disaster tile 1 in packing, protruding from the surface of the flat terraces 6b The engaging convex part 16 is housed in the storage notch 24 on the back surface of the flat terrace 6b, and does not increase the total volume when packed, and can be easily transported.
[Brief description of the drawings]
FIG. 1 is a plan view of a disaster prevention tile according to the present invention.
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a plan view showing the staggering of disaster prevention tiles.
FIG. 5 is an enlarged plan view showing a wind-resistant engaging portion when staggering.
6 is a cross-sectional view of the main part of FIG.
FIG. 7 is a view showing a polymerized package.
FIG. 8 is a cross-sectional view of a mold .
FIG. 9 is an enlarged cross-sectional view of a main part of a mold at an engagement convex portion forming portion .
FIG. 10 is an enlarged side view of a main part of an engagement protrusion forming portion in the upper mold .
FIG. 11 is a schematic view showing a molded state of the engaging convex portion .
FIG. 12 is a perspective view of a conventional wind resistant thick flat roof tile according to prior art 1;
13 is a plan view of the roof tiles of FIG .
14 is a perspective view of a main part of the alignment shown in FIG . 13;
15 is a cross-sectional view taken along line AA in FIG .
FIG. 16 is a perspective view of a wind resistant thick flat roof tile of prior art 2;
FIG. 17 is a perspective view of the main part of the roof tile of FIG . 16;
[Explanation of symbols]
2 Tile body 4 Butt 6 Water return
6b Planar terrace 7 Pier 8 Insert 9 Water return
16 Engaging projection
17 Engagement plug
18 Upright
19 Horizontal section
20 Plug-in space
30 mold
32 Upper mold
33 Lower mold
35 Convex section
37 Press forming part

Claims

At the both ends of the tile body, a crosspiece and an insertion portion that are polymerized at the time of mating are formed, and the central part of the bottom side water return of the tile body is made wider than both end parts, and the flat terrace is higher than the surface of the tile body. A wide engaging projection in the flow direction is provided near the center of the upper surface of the flat terrace, and a horizontal portion extending from the rising portion to the crosspiece side in the flow direction. An insertion space is formed between the water return upper surface located directly below the lower surface of the horizontal portion, and the engagement insertion portion whose upper and lower positions are regulated by being inserted into the insertion space when staggering is inserted. A disaster prevention roof tile provided on the outer side of the water return in the section, wherein the upper surface of the engagement insertion portion is above the lower surface of the insertion portion .