JP3695452B2 - Building board and manufacturing method thereof - Google Patents

Building board and manufacturing method thereof Download PDF

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Publication number
JP3695452B2
JP3695452B2 JP2003152318A JP2003152318A JP3695452B2 JP 3695452 B2 JP3695452 B2 JP 3695452B2 JP 2003152318 A JP2003152318 A JP 2003152318A JP 2003152318 A JP2003152318 A JP 2003152318A JP 3695452 B2 JP3695452 B2 JP 3695452B2
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grain
forming
paint
paint layer
forming convex
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JP2004353299A (en
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士郎 高木
博昭 丸子
博 油原
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Nichiha Corp
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Nichiha Corp
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Description

【0001】
【技術分野】
本発明は,建築物の外壁として施工する建築板であって,特に凹凸模様を形成した意匠表面に塗装を行って形成した建築板及びその製造方法に関する。
【0002】
【従来技術】
例えば,建築物の外壁として施工するために量産される建築板においては,単調な仕上り感を避けるために,建築板の意匠表面の凹凸模様,この意匠表面の塗装の仕方等の工夫がなされている。そして,例えば,特許文献1,2に示すように,上記意匠表面が,自然な外観や,立体的な外観を呈するように努力がなされている。
【0003】
特許文献1においては,建築板の意匠表面に,平坦部分とこの平坦部分より陥没形成した模様凹部とを有しており,上記平坦凸部と上記模様凹部との色調を異ならせることにより,意匠表面が自然な外観を呈する建築板を形成している。
また,特許文献2においては,建築板の意匠表面に木目調を呈する凹凸模様を形成し,この凹凸模様における凸部と凹部との色彩を異ならせることにより,意匠表面が立体的な外観を呈する建築板を形成している。
【0004】
【特許文献1】
特開平11−310485号公報
【特許文献2】
特開平10−317631号公報
【0005】
【解決しようとする課題】
しかしながら,上記特許文献1の建築板においては,上記意匠表面に表現する色調の違いは,上記平坦部分における模様凹部の陥没に対応して形成されたものである。すなわち,この色調の違いは,上記模様凹部の意匠表面突出高さが,上記平坦部分よりも低いことにより形成されたものである。
【0006】
また,上記特許文献2の建築板においては,上記意匠表面に表現する色彩の違いは,上記凹凸模様における凸部の突出に対応して形成されたものである。すなわち,この色彩の違いは,上記凸部の意匠表面突出高さが,上記凹部よりも高いことにより形成されたものである。
そのため,上記従来の建築板における色調又は色彩の変化は,あくまでも建築板の意匠表面における各部の意匠表面突出高さの違いに対応して形成されてものである。そのため,建築板の意匠表面に,より複雑な意匠外観を形成するためには,一層の工夫が必要とされる。
【0007】
本発明は,かかる従来の問題点に鑑みてなされたもので,木目凹凸模様の木目形成凸部だけにおいて,また凹部だけにおいても異なる色外観を呈することができ,より複雑な木目調の意匠外観を呈することができる建築板及びその製造方法を提供しようとするものである。
【0008】
【課題の解決手段】
第1の発明は,木目調を呈するための複数の木目形成凸部を形成してなる木目凹凸模様を有する原板の意匠表面に,下側塗料層及び上側塗料層を順次設けてなる建築板において,
上記上側塗料層は,上記下側塗料層を構成する塗料よりも濃色の塗料により構成されており,
上記木目形成凸部の頂点部に形成された1mm以上の幅を有する略平坦面と,上記木目形成凸部同士の間に位置する凹部に形成された15mm以上の幅を有する底面とには,上記下側塗料層が露出した露出表面が形成されていることを特徴とする建築板にある(請求項1)。
【0009】
本発明の建築板は,下側塗料層の表面にこの下側塗料層を構成する塗料よりも濃色の塗料により構成された上側塗料層を有してなるものである。
そして,上記木目形成凸部の頂点部に形成された1mm以上の幅を有する略平坦面と,上記凹部に形成された15mm以上の幅を有する底面とには,上記上側塗料層を構成する塗料よりも淡色の塗料により構成された下側塗料層が露出してなる露出表面が形成されている。また,木目形成凸部及び凹部における露出表面が形成されていない残りの部分には,下側塗料層の表面を上記濃色の塗料による上側塗料層が覆った被覆表面が形成されている。
【0010】
具体的には,上記被覆表面は,上記木目形成凸部の頂点部に形成された1mm未満の幅を有する略平坦面と,上記凹部に形成された15mm未満の幅を有する底面とに形成されている。
ここで,上記幅とは,上記木目調の形成方向に直交する直交方向の断面における幅のことをいう。
また,木目形成凸部の頂点部においては,上記略平坦面が形成されておらず,鋭角状の曲状端部が形成されていることもある。この場合には,この曲状端部には上記被覆表面が形成されている。
【0011】
本発明の建築板の意匠表面においては,上記木目凹凸模様の木目形成凸部だけにおいて,また上記凹部だけにおいても,上記下側塗料層による淡色の色外観を呈する露出表面と,上記上側塗料層による濃色の色外観を呈する被覆表面とが混在する。そのため,本発明の建築板の意匠表面は,従来のように各部(凹凸)の意匠表面突出高さの違いに対応して異なる色外観を呈するのではなく,木目形成凸部だけにおいて,また凹部だけにおいても異なる色外観を呈することができる。それ故,本発明の建築板の意匠表面は,より複雑な木目調の意匠外観を呈することができる。
【0012】
第2の発明は,木目調を呈するための複数の木目形成凸部による木目凹凸模様を形成してなる意匠表面を有する原板を準備する準備工程と,
上記原板の意匠表面に第1塗料を塗布し乾燥して,下側塗料層を形成する下側塗料層形成工程と,
上記下側塗料層の表面に,上記第1塗料よりも濃色の第2塗料を塗布して,上側塗料層を形成する上側塗料層形成工程と,
上記第2塗料が乾燥する前に,上記木目形成凸部の頂点部における1mm以上の幅を有する略平坦面について上記第2塗料を掻き取ると共に,上記木目形成凸部同士の間に位置する凹部における15mm以上の幅を有する底面について上記第2塗料を掻き取って,上記木目形成凸部における略平坦面及び上記凹部における底面に上記下側塗料層が露出した露出表面を形成する掻取り工程とを行うことを特徴とする建築板の製造方法にある(請求項7)。
【0013】
本発明の製造方法においては,上記準備工程,上記下側塗料層形成工程,上側塗料層形成工程及び上記掻取り工程を行うことによって,上述した優れた作用効果を有する建築板を効率的に製造することができる。
そして,上記各工程を行うことによって,上記木目形成凸部の頂点部における1mm以上の幅を有する略平坦面と,上記凹部における15mm以上の幅を有する底面とには,上記上側塗料層を構成する塗料よりも淡色の塗料により形成された下側塗料層が露出してなる露出表面が形成される。また,木目形成凸部及び凹部における露出表面が形成されていない残りの部分には,下側塗料層の表面を上記濃色の塗料による上側塗料層が覆った被覆表面が形成される。
【0014】
これにより,上記発明と同様に,上記建築板の意匠表面においては,上記木目形成凸部だけにおいて,また凹部だけにおいても,下側塗料層による淡色の色外観を呈する露出表面と,上側塗料層による濃色の色外観を呈する被覆表面とが混在する。
そのため,本発明の製造方法によれば,木目凹凸模様の木目形成凸部だけにおいて,また凹部だけにおいても異なる色外観を呈することができ,より複雑な木目調の意匠外観を呈することができる建築板を効率的に製造することができる。
【0015】
また,上記掻取り工程において,上記木目形成凸部の頂点部における1mm以上の幅を有する略平坦面と,上記凹部における15mm以上の幅を有する底面とに露出表面を形成できる理由は,以下のように考える。
すなわち,上記木目形成凸部の頂点部には,1mm未満の幅を有する略平坦面も形成されている。そして,上記木目形成凸部における1mm以上の幅を有する略平坦面は,1mm未満の幅を有する略平坦面よりも大きな接触面積で掻取り具に当接する。そのため,この当接の際に,木目形成凸部における1mm以上の幅を有する略平坦面に塗布された第2塗料が掻取り具に付着して掻き取られ,上記露出表面を形成すると考える。
【0016】
一方で,木目形成凸部における1mm未満の幅を有する略平坦面は,1mm以上の幅を有する略平坦面よりも掻取り具に当接する接触面積が小さい。そのため,この当接の際に,木目形成凸部における1mm未満の幅を有する略平坦面に塗布された第2塗料が掻取り具に付着して掻き取られることはあっても,この掻き取られた部分がその周辺の第2塗料により補填されることによって上記被覆表面を形成すると考える。また,木目形成凸部における1mm未満の幅を有する略平坦面に塗布された第2塗料は,掻取り具に掻き取られることなく,この略平坦面へと引っ張られて,この略平坦面に残存することもあると考える。
【0017】
また,上記凹部には,15mm未満の幅を有する底面も形成されている。そして,上記凹部における15mm以上の幅を有する底面は,その幅が大きいことにより掻取り具に当接することができる。そのため,この当接の際に,凹部における15mm以上の幅を有する底面に塗布された第2塗料が掻取り具に付着して掻き取られ,上記露出表面を形成すると考える。
【0018】
一方で,凹部における15mm未満の幅を有する底面は,その幅が狭いために掻取り具に当接しないことが多い。そのため,この当接の際に,凹部における15mm未満の幅を有する底面に塗布された第2塗料は,掻取り具に付着することなく,この底面に残存し,上記被覆表面を形成すると考える。
【0019】
【発明の実施の形態】
上述した本発明における好ましい実施の形態につき説明する。
上記第1,第2の発明において,上記露出表面を形成した木目形成凸部の頂点部における略平坦面の幅の上限は,建築板の意匠表面に形成する木目調の外観意匠性から考慮して15mm未満とすることが好ましい。
また,上記露出表面を形成した木目形成凸部の頂点部における略平坦面の幅が1mm未満である場合には,この露出表面を形成することが困難になる。
【0020】
また,上記露出表面を形成した凹部における底面の幅の上限は,建築板の意匠表面に形成する木目調の外観意匠性から考慮して50mm未満とすることが好ましい。
また,上記露出表面を形成した凹部における底面の幅が15mm未満である場合には,この露出表面を形成することが困難になる。
また,上記凹部の底面に対する上記木目形成凸部の頂点部までの高さは,0.5〜3mmとすることが好ましい。
【0021】
また,上記第1の発明において,上記露出表面は,上記下側塗料層の表面に上記上側塗料層を構成するための塗料を塗布した後,該塗料が乾燥する前に,該塗料の一部を除去することにより形成したものであることが好ましい(請求項2)。
この場合には,上記下側塗料層の表面に上記上側塗料層を形成するための塗料を塗布し,その後,この塗料の一部を除去して上記露出表面を形成することができる。そのため,上記露出表面を,特別な塗装等を行うことなく,容易かつ効率的に形成することができる。
【0022】
また,上記塗料の除去は,上記上側塗料層を構成する塗料を塗布した建築板の意匠表面に,掻取り具を当接させて,上記塗料の一部を掻き取ることによって行うことができる。この場合には,木目形成凸部における1mm以上の幅を有する略平坦面が,1mm未満の幅を有する略平坦面よりも大きな接触面積で掻取り具に当接することを利用して,上記露出表面を形成することができる。
また,凹部における15mm以上の幅を有する底面が掻取り具に当接し,15mm未満の幅を有する底面が掻取り具に当接しないことを利用して,上記露出表面を形成することができる。
【0023】
また,上記木目凹凸模様は,上記木目形成凸部と,節部を呈するための節形成凸部とを有していることが好ましい(請求項3)。
この場合には,上記木目形成凸部の頂点部における1mm以上の幅を有する略平坦面だけでなく,上記節形成凸部の頂点部に形成された1mm以上の幅を有する略平坦面にも上記露出表面を形成することができる。そのため,上記建築板は,上記木目形成凸部及び節形成凸部により,実際の木材に近似したリアリティのある意匠外観を呈することができる。
【0024】
また,上記建築板の意匠表面は,上記木目凹凸模様を形成した模様形成領域と,該模様形成領域よりも陥没した目地溝とを有しており,該目地溝には,上記下側塗料層の表面を上記上側塗料層が覆った被覆表面が形成されていることが好ましい(請求項4)。
この場合には,上記模様形成領域と上記目地溝とを有する建築板において,目地溝には上記被覆表面を形成することにより,目地溝が目立たないようにして,上記模様形成領域における木目凹凸模様に形成した露出表面を際立たせることができる。
【0025】
また,上記目地溝は,建築物の外壁に複数の建築板を横方向又は縦方向に並べて施工したときに,建築板同士の間の繋ぎ目が目立たなくすることを意図して形成することができる。すなわち,目地溝は,建築板の一方側の端部には,この目地溝の底面及び一方側壁を形成し,建築板の他方側の端部には,この目地溝の他方側壁を形成して,建築板を横方向又は縦方向に並べて施工したときに1つの目地溝を形成するよう構成することができる(図8参照)。また,目地溝は,建築板の両端部同士の間にも,所定の間隔を保って形成することができる。
【0026】
また,上記各木目形成凸部は,上記木目調の形成方向に直交する直交方向の断面において,それぞれ上記木目調の中心側に位置する内側壁面が,他方側に位置する外側壁面よりも緩やかな緩傾斜状に形成されていることが好ましい(請求項5)。
【0027】
ところで,上記木目調とは,樹木を挽いた断面において,この樹木の内部に形成された年輪により呈する外観とほぼ同様の外観もしくはこれに近似した外観のことをいう。また,上記木目調の中心側とは,この木目調で表現しようとする樹木の中心,すなわち樹木の髄のある側をいう。よって,上記木目調の中心側は,必ずしも上記意匠表面の中心側に位置するものではなく,場合によっては意匠表面の端部に位置することもある。
また,上記木目調の形成方向とは,この木目調が表現しようとする樹木の長手方向(樹木が伸びる方向)のことをいう。
【0028】
上記の場合には,各木目形成凸部における内側壁面は,上記木目調の中心側を向く明確な方向性を有して形成されており,上記緩傾斜状の内側壁面には光が照射され易く,外側壁面には光が照射され難い状態を形成することができる。そのため,上記木目調の中心側を向く内側壁面は明るい外観を呈し,この中心側とは反対側の他方側を向く外側壁面は暗い外観を呈することができる。
そのため,上記建築板の意匠表面の各木目形成凸部に意図的に陰影効果を発揮させることができ,上記建築板は,リアリティのある立体的な木目調の意匠外観を呈することができる。
【0029】
また,上記各木目形成凸部における内側壁面には,上記露出表面が形成されていることが好ましい(請求項6)。
この場合には,上記内側壁面は,上記淡色の塗料からなる下側塗料層により一層明るい外観を呈し,一方で,上記外側壁面は,上記濃色の塗料からなる上側塗料層により一層暗い外観を呈することができる。そのため,上記各木目形成凸部に,一層明確な陰影効果を発揮させることができ,上記建築板は,一層リアリティのある立体的な木目調の意匠外観を呈することができる。
【0030】
また,上記第1,第2の発明において,上記露出表面は,上記下側塗料層の表面に上記上側塗料層を構成するための塗料を塗布した後,該塗料が乾燥する前に,上記木目形成凸部のいずれに対しても,掻取り具を当接させて形成することができる。この場合には,掻取り具に特別な工夫を必要とすることがなく,一層容易かつ効率的に上記露出表面を形成することができる。
【0031】
【実施例】
以下に,図面を用いて本発明の建築板及びその製造方法にかかる実施例につき説明する。
本例の建築板1は,図1〜図3に示すごとく,木目調を呈するための多数の木目形成凸部21を形成してなる木目凹凸模様203を有する原板2の意匠表面201に,下側塗料層3及び上側塗料層4を順次設けてなるものである。また,上記上側塗料層4は,上記下側塗料層3を構成する淡色の第1塗料30よりも色彩が濃い濃色の第2塗料40により構成されている。
【0032】
上記各木目形成凸部21においては,その頂点部210に略平坦状の略平坦面211を形成してなる平坦凸部21Aと,その頂点部210に鋭角状の曲状端部212を形成してなる曲状凸部21Bとがある。また,各木目形成凸部21同士の間に位置する各凹部22には,略平坦状の底面221を形成してなる平坦凹部22Aと,曲状の曲状面222を形成してなる曲状凹部22Bとがある。
【0033】
そして,上記木目形成凸部21による上記木目調の形成方向(木目調の長尺方向)Lに直交する直交方向Wの幅が1mm以上である平坦凸部21Aにおける略平坦面211には,上記下側塗料層3が露出した露出表面101が形成されている。また,上記直交方向Wの幅が1mm未満である平坦凸部21Aにおける略平坦面211には,上記下側塗料層3の表面を上記上側塗料層4が覆った被覆表面102が形成されている。
【0034】
また,上記直交方向Wの幅が15mm以上である上記平坦凹部22Aにおける底面221には,上記下側塗料層3が露出した露出表面101が形成されている。また,上記直交方向Wの幅が15mm未満である上記平坦凹部22Aにおける底面221には,上記被覆表面102が形成されている。
また,上記曲状凸部21B及び上記曲状凹部22Bにも,上記被覆表面102が形成されている。
【0035】
以下に,これを詳説する。
図1〜図3に示すごとく,本例の建築板1は,量産可能な窯業系建築板1でありながら,木材を挽いたときの切断面の外観に近似した木目調の凹凸外観を有するものである。
図1,図2は,上記建築板1を,上記木目調の形成方向(長尺方向)Lに直交する直交方向Wにおいて切断して観察した断面説明図である。なお,これらの図は説明用の模式図なので,木目形成凸部21及び凹部22が,実際にはこれらの図に示した数よりも多数形成されている。
【0036】
図1,図2に示すごとく,上記平坦凸部21Aにおける略平坦面211は,必ずしも平坦である必要はなく,若干円弧凸状に曲がって形成されていてもよい。
また,上記平坦凹部22Aにおける底面221は,必ずしも平坦である必要はなく,若干曲がって形成されていてもよい。
【0037】
上記平坦凸部21A又は曲状凸部21Bである各木目形成凸部21は,上記建築板1が表現しようとする木材(樹木)における年輪の晩材部を表現するものであり,上記平坦凹部22A又は曲状凹部22Bである各凹部22は,上記年輪の早材部を表現するものである。
上記早材部とは,1年間に形成される1年輪において,春から初夏にかけて樹木の成長が早い時期にできる部分をいい,上記晩材部とは,初夏以後,樹木の生長が緩やかな時期にできる部分をいう。
本例の各木目形成凸部21は,上記年輪の外観を呈する木材(樹木)において,晩材部の硬さが早材部の硬さよりも硬いことに対応して,各凹部22よりも突出させて形成したものである。
【0038】
また,図1,図2に示すごとく,上記各木目形成凸部21は,上記直交方向Wの断面において,それぞれ上記木目調の中心側Cに位置する内側壁面215が,他方側Dに位置する外側壁面216よりも緩やかな緩傾斜状に形成されている。
なお,木目調の中心側Cとは,この木目調で表現しようとする樹木の中心O,すなわち樹木の髄Oのある側をいう(図4参照)。
そして,上記内側壁面215は,樹木の1年輪の形成過程において,早材部から晩材部に移り変わるときの年輪の状態を表現しており,上記外側壁面216は,晩材部から早材部に移り変わるときの年輪の状態を表現している。
【0039】
すなわち,上記内側壁面215は,早材部から晩材部に移り変わるときには,徐々に年輪の硬さが増加することに対応して形成されており,上記外側壁面216は,晩材部から早材部に移り変わるときには,急激に年輪の硬さが減少することに対応して形成されたものである。
そして,上記内側壁面215及び外側壁面216はいずれも傾斜状に形成されており,内側壁面215の傾斜角度は外側壁面216の傾斜角度よりも緩やかに形成されている。
【0040】
図1〜図3に示すごとく,上記各木目形成凸部21及び各凹部22は,木目調における柾目部を呈するための柾目形成部205と,木目調における板目部を呈するための板目形成部206として形成されている。そして,上記1mm以上の直交方向Wの幅を有する略平坦面211を備えた平坦凸部21Aのほとんどは,上記板目形成部206において形成されている。一方で,上記1mm未満の直交方向Wの幅を有する略平坦面211を備えた平坦凸部21A,及び上記曲状端部212を備えた曲状凸部21Bのほとんどは,上記柾目形成部205において形成されている。
【0041】
また,上記15mm以上の直交方向Wの幅を有する底面221を備えた平坦凹部22Aのほとんどは,上記板目形成部206において形成されている。一方で,上記15mm未満の直交方向Wの幅を有する底面221を備えた平坦凹部22A,及び上記曲状面222を備えた曲状凹部22Bのほとんどは,上記柾目形成部205において形成されている。
【0042】
また,図3に示すごとく,上記柾目形成部205は,これを構成する各木目形成凸部21を互いに平行に近い状態で長尺状に形成してなる。一方で,上記板目形成部206は,これを構成する各木目形成凸部21を長尺状に形成してなると共に,上記木目調の形成方向Lの一方向に向けて山状又は波状等の不規則な形状を形成してなる。
【0043】
また,図1,図2に示すごとく,上記板目形成部206における各木目形成凸部21の内側壁面215には,上記露出表面101が形成されている。本例では,上記1mm以上の直交方向Wの幅を有する略平坦面211を備えた平坦凸部21Aにおける内側壁面215に,上記露出表面101が形成されている。
一方で,上記板目形成部206における各木目形成凸部21の外側壁面216には,上記被覆表面102が形成されている。また,上記柾目形成部205における各木目形成凸部21の内側壁面215及び外側壁面216には,上記被覆表面102が形成されている。
【0044】
また,図1に示すごとく,上記板目形成部206における上記15mm以上の直交方向Wの幅を有する底面221を備えたいずれかの平坦凹部22Aには,底面221よりもさらに陥没した多数の微細凹部223が形成されている。そして,上記15mm以上の直交方向Wの幅を有する平坦凹部22Aの底面221には,上記露出表面101が形成されており,上記多数の微細凹部223には,上記被覆表面102が形成されている。
【0045】
また,本例では,上記各木目形成凸部21における略平坦面211において,直交方向Wの幅は最大でも15mm以下となっている。また,上記各凹部22における底面221において,直交方向Wの幅は最大でも50mm以下となっている。
また,上記各木目形成凸部21の直交方向Wにおける断面形状は,上記木目調の形成方向Lに向けて一定ではなく,複雑に変化している。また,これに伴って,上記各凹部22の直交方向Wにおける断面形状も,上記木目調の形成方向Lに向けて一定ではなく,複雑に変化している。
【0046】
図4は,樹木をこれが伸びる長手方向に沿って挽いたときに,その切断断面に現れる外観を示す図である。そして,本例の建築板1における木目凹凸模様203は,同図に示すごとく,樹木の中心(髄)Oからずれた位置X1で挽いたときに現れる板目形成部206と柾目形成部205とが混在する外観を表現するものである。
一方で,上記木目凹凸模様203は,樹木の中心(髄)Oの位置X0又はその近傍の位置X0を通って挽いたときに現れる柾目形成部205のみの外観を表現することもできる。
【0047】
また,図5に示すごとく,建築板1においては,上記木目凹凸模様203によって,樹木の長手方向に沿った切断断面の左右いずれかの年輪による外観を表現することもできる。この場合には,上記木目調の中心側Cは,上記建築板1における一方向側Cとなり,各木目形成凸部21は,一方向側Cに上記内側壁面215を有すると共に,一方向側Cとは反対側の他方向側Dに上記外側壁面216を有することとなる。
【0048】
また,図3に示すごとく,上記木目凹凸模様203は,上記木目調を呈するための各木目形成凸部21と,節部を呈するための節形成凸部21Cとを有してなる。ここで,節部とは,枝が樹木の成長過程において幹に包み込まれることによりできる部分をいう。
そして,本例においては,上記建築板1の意匠表面201は,上記木材(樹木)の年輪の晩材部が突出すると共に上記木材(樹木)の節部が突出した木目調の凹凸外観を有している。
【0049】
そして,節形成凸部21Cは,以下のように種々の形態で形成されている。
すなわち,図6に示すごとく,1つの形態の節形成凸部21Cは,上記柾目形成部205における複数の木目形成凸部21を分断するよう形成されている。
また,図7に示すごとく,他の形態の節形成凸部21Cは,上記板目形成部206における木目形成凸部21同士の間に形成されている。
なお,上記節形成凸部21Cは,上記建築板1の意匠表面201に種々の環状形状として形成されていてもよく,上記意匠表面201の端部で分断された状態で形成されていてもよい。
【0050】
また,図2,図6,図7に示すごとく,上記節形成凸部21C内には,この節形成凸部21Cの頂点部210よりも陥没してなる節凹部213が形成されている。そして,節形成凸部21Cは,その頂点部210に1mm以上の直交方向Wの幅を有する略平坦面211を有しており,この略平坦面211には上記露出表面101が形成されている。一方で,上記節凹部213には,上記被覆表面102が形成されている。
【0051】
また,上記各木目形成凸部21A,B,上記各凹部22及び上記節形成凸部21Cに形成した露出表面101は,下側塗料層3の表面に上側塗料層4を構成するための第2塗料40を塗布した後,この第2塗料40が乾燥する前に,この第2塗料40の一部を掻取り具により掻き取って形成したものである。
また,上記下側塗料層3は,淡色の第1塗料30を用いて形成し,上記上側塗料層4は,上記第1塗料30よりも色彩が濃い濃色の第2塗料40を用いて形成したものである。
【0052】
なお,色には,色相,明度及び彩度の3属性があるが,本例においては,第1塗料30及び第2塗料40は,ほぼ同じ色相を有する同系色の塗料からなり,色彩としての明度を異ならせてなる塗料から構成されている。
なお,第1塗料30及び第2塗料40は,色彩としての彩度を異ならせて構成してもよい。
また,上記原板2の意匠表面201に,これらの塗料30,40の塗装を行う際には,略同一の色素(色相)を有する第1塗料30及び第2塗料40を1組とし,この塗料30,40の組を,種々の色素についても準備して使い分けることができる。
【0053】
また,図3,図8に示すごとく,上記建築板1の意匠表面201は,上記木目凹凸模様203を形成した模様形成領域24と,この模様形成領域24よりも陥没した目地溝25とを有している。そして,この目地溝25には,上記上側塗料層4による被覆表面102が形成されている。
また,本例では,上記目地溝25は,建築板1の長手方向Lに沿って形成された縦目地溝25Aと,直交方向Wに沿って形成された横目地溝25Bとからなる。
【0054】
また,図8に示すごとく,建築板1の一方側の端部Eには,この縦目地溝25Aの底面251及び一方側壁252が形成されており,建築板1の他方側の端部Fには,この縦目地溝25Aの他方側壁253が形成されている。そして,建築板1を横方向又は縦方向に並べて建築物の外壁に施工したときに1つの縦目地溝25Aを形成することができる。また,縦目地溝25Aは,建築板1の両端部E,F同士の間にも,所定の間隔を保って1箇所又は複数箇所に形成されている。
また,上記目地溝25に被覆表面102を形成したことにより,複数の建築板1を横方向又は縦方向に並べて施工した際に,建築板1同士の間の繋ぎ目109が目立たないようにして,上記露出表面101による複雑な意匠外観を際立たせることができる。
【0055】
以下に,意匠表面201に上記上側塗料層4による露出表面101を形成してなる建築板1を製造する方法につき説明する。
本例の建築板1の製造方法においては,以下の準備工程,下側塗料層形成工程,上側塗料層形成工程,掻取り工程及びクリアー層形成工程を行って,上記建築板1を製造する。
すなわち,図9,図10に示すごとく,上記準備工程においては,木目凹凸模様203を形成してなる意匠表面201を有する原板2を準備する。この原板2における木目凹凸模様203は,木目調を呈するための複数の木目形成凸部21A,Bと,木目調における節部を呈するための節形成凸部21Cとを有してなる。
【0056】
本例の原板2は,セメント質原料(セメント,ケイ酸原料等)に,木質原料(木繊維,木チップ等),添加剤及び水等を混合して混合原料とし,これを成形型の成形面上に散布して成形(フォーミング)したセメント系原板2である。
そして,このセメント系原板2の意匠表面201には,多数の木目形成凸部21A,B及び1つ又は複数の節形成凸部21Cが形成されている。また,このセメント系原板2の意匠表面201は,全体の木目形成凸部21A,B及び節形成凸部21Cの意匠表面突出高さHが,ほぼ同一の高さになるよう形成した。
【0057】
なお,本例の意匠表面突出高さHとは,図9に示すごとく,上記セメント系原板2の裏面202から木目形成凸部21A,Bの頂点部210又は節形成凸部21Cの頂点部210までの高さ(厚み)Hのことをいう。
また,セメント系原板2の意匠表面201は,上記各凹部22の底面221から各木目形成凸部21A,B及び節形成凸部21Cの頂点部210までの高さ(各木目形成凸部21A,B及び節形成凸部21Cの頂点部210から各凹部22の底面221までの深さ)Iが,ほぼ0.7mmとなるよう形成した。
【0058】
また,図10に示すごとく,上記セメント系原板2の意匠表面201においては,上記木目調の柾目部の外観を呈する柾目形成部205と,上記木目調の板目部の外観を呈する板目形成部206と,上記節部の外観を呈する節形成凸部21Cとにより,木材の外観に近似した複雑でリアリティのある凹凸外観が形成されている。
【0059】
次いで,図11に示すごとく,上記下側塗料層形成工程においては,上記セメント系原板2の意匠表面201に第1塗料30を塗布し,この第1塗料30を乾燥させる。そして,セメント系原板2の意匠表面201の全体,すなわち,木目凹凸模様203を形成した模様形成領域24及び上記目地溝25の全体に,下側塗料層3を形成する。
【0060】
次いで,上記上側塗料層形成工程においては,上記下側塗料層3の表面に第2塗料40を塗布して,上側塗料層4を形成する。本例では,この第2塗料40には,水系の塗料を用いた。
上記掻取り工程においては,図12に示すごとく,上記セメント系原板2の意匠表面201に当接して第2塗料40の一部を掻き取る掻取り具としての掻取りロール51と,この掻取りロール51に対向配設すると共に,上記セメント系原板2の裏面202に当接するバックアップロール52とを有する掻取り装置5を用いる。
【0061】
そして,セメント系原板2を,掻取りロール51とバックアップロール52との間の隙間53に搬入させたときには,掻取りロール51のロール表面510には,第2塗料40を塗布したセメント系原板2の意匠表面201が当接し,バックアップロール52のロール表面520には,セメント系原板2の裏面202が当接する。
【0062】
そして,図13に示すごとく,上記掻取り工程においては,上記塗布した第2塗料40が乾燥する前に,この第2塗料40を塗布したセメント系原板2の意匠表面201に掻取りロール51を当接させる。
このとき,同図に示すごとく,各木目形成凸部21A,Bと節形成凸部21Cとの意匠表面突出高さHは,略同一になるよう形成されているため,掻取りロール51のロール表面510は,いずれの各木目形成凸部21A,B及び節形成凸部21Cに対しても当接する。
【0063】
また,このとき,図13に示すごとく,上記平坦凹部22Aにおける15mm以上の直交方向Wの幅を有する底面221に対しても,掻取りロール51のロール表面510が当接する。また,15mm以上の直交方向Wの幅を有する底面221を備えた平坦凹部22Aに隣接する木目形成凸部21の内側壁面215にも,掻取りロール51のロール表面510が当接する。
【0064】
そして,図14に示すごとく,上記木目形成凸部21としての平坦凸部21Aにおける1mm以上の直交方向Wの幅を有する略平坦面211に塗布された第2塗料40は,掻取りロール51のロール表面510に付着して掻き取られる。
また,図14に示すごとく,上記平坦凹部22Aにおける15mm以上の直交方向Wの幅を有する底面221及びこの平坦凹部22Aに隣接する木目形成凸部21の内側壁面215に塗布された第2塗料40もまた,掻取りロール51のロール表面510に付着して掻き取られる。
また,図15に示すごとく,上記節形成凸部21Cの頂点部210に塗布された第2塗料40もまた,掻取りロール51のロール表面510に付着して掻き取られる。
【0065】
そして,図1,図2に示すごとく,上記掻取りが行われた平坦凸部21Aにおける1mm以上の直交方向Wの幅を有する略平坦面211,節形成凸部21Cの頂点部210,上記平坦凹部22Aにおける15mm以上の直交方向Wの幅を有する底面221及びこの平坦凹部22Aに隣接する木目形成凸部21の内側壁面215には,上記下側塗料層3が露出した露出表面101が形成される。
【0066】
一方で,上記掻取りが行われていない木目凹凸模様203における残りの部分には,上記下側塗料層3の表面を上記第2塗料40による上側塗料層4が覆った被覆表面102が形成される。すなわち,上記平坦凸部21Aにおける1mm未満の直交方向Wの幅を有する略平坦面211,上記曲状凸部21B,上記節形成凸部21C内の節凹部213,上記平坦凹部22Aにおける15mm未満の直交方向Wの幅を有する底面221,上記曲状凹部22B,上記微細凹部223,上記木目形成凸部21の外側壁面216等には,被覆表面102が形成される。
【0067】
特に,上記平坦凸部21Aにおける1mm未満の直交方向Wの幅を有する略平坦面211,上記曲状凸部21Bに塗布された第2塗料40は,掻取りロール51のロール表面510に当接しながらもこの掻取りロール51によって掻き取られずに,上記意匠表面201に残存する。
【0068】
このように,上記平坦凸部21Aにおける1mm以上の直交方向Wの幅を有する略平坦面211に露出表面101が形成された理由としては,この平坦凸部21Aにおける略平坦面211は比較的広い接触面積で掻取りロール51に当接したためであると考えられる。すなわち,掻取りロール51によって,セメント系原板2の意匠表面201に塗布した第2塗料40を掻き取るには,ロール表面に対する接触幅が1mm以上必要であると考えられる。
【0069】
また,上記節形成凸部21Cの頂点部210に露出表面101が形成された理由としては,この節形成凸部21Cの頂点部210には,1mm以上の直交方向Wの幅を有する略平坦面211が形成されていたためであると考える。そして,この節形成凸部21Cの略平坦面211が比較的広い接触面積で掻取りロール51に当接したためであると考えられる。
【0070】
また,上記平坦凹部22Aにおける15mm以上の直交方向Wの幅を有する底面221に露出表面101が形成された理由としては,この平坦凹部22Aにおける底面221が,その直交方向Wの幅が15mm以上と大きいことにより,掻取りロール51に当接することができ,この当接の際に比較的広い(15mm以上の)接触面積で当接することができたためであると考えられる。
【0071】
また,上記15mm以上の直交方向Wの幅を有する底面221を備えた平坦凹部22Aに隣接する木目形成凸部21の内側壁面215に露出表面101が形成された理由としては,平坦凹部22Aにおける底面221の直交方向Wの幅が15mm以上と大きく,木目形成凸部21の内側壁面215が緩やかな緩傾斜状に形成されていることにより,この木目形成凸部21の内側壁面215が掻取りロール51に当接することができたためであると考えられる。
【0072】
一方で,上記平坦凸部21Aにおける1mm未満の直交方向Wの幅を有する略平坦面211及び上記曲状凸部21Bに被覆表面102が形成された理由としては,以下のように考えられる。すなわち,上記1mm未満の直交方向Wの幅を有する略平坦面211及び曲状凸部21Bは掻取りロール51に対して当接するものの,その接触面積が小さい。そのため,この略平坦面211及び曲状凸部21Bに塗布された第2塗料40が掻取りロール51に付着して掻き取られることはあっても,この掻き取られた部分がその周辺の第2塗料40により補填されたためであると考えられる。
【0073】
また,上記節形成凸部21C内の節凹部213,上記平坦凹部22Aにおける15mm未満の直交方向Wの幅を有する底面221,上記曲状凹部22B,上記微細凹部223,上記木目形成凸部21の外側壁面216等に被覆表面102が形成された理由としては,これらは掻取りロール51に当接しなかったためであると考えられる。
【0074】
なお,上記各木目形成凸部21A,B,節形成凸部21C,各凹部22の各部への露出表面101の形成には,上記直交方向Wの幅以外にも,掻取りロール51の材質,掻取りロール51のロール表面510の硬度等も若干影響していると考えられる。本例では,上記掻取りロール51は,ブチルスポンジゴム等のスポンジ材料よりなるスポンジ層511と,ゴム硬度が約50度のEPDM(エチレンプロピレンゴム)等のゴム材料よりなると共に上記スポンジ層511の外周側に配設したゴム層512とを用いて構成した(図12参照)。
【0075】
次いで,図示は省略するが,上記露出表面101及び被覆表面102を形成したセメント系原板2を乾燥させた後には,上記クリアー層形成工程として,上記乾燥させた露出表面101及び被覆表面102に,クリアー塗料層を形成するためのクリアー塗料を塗布して乾燥させる。そして,セメント系原板2の意匠表面201の最表面に,耐候性等を向上させるためのクリアー塗料層を形成する。
こうして,上記各平坦凸部21A,各平坦凹部22A及び節形成凸部21Cに露出表面101を形成してなる建築板1を製造することができる。
【0076】
以下に,上記建築板1及びその製造方法における作用効果につき説明する。
上記のごとく,本例においては,上記平坦凸部21Aにおける1mm以上の直交方向Wの幅を有する略平坦面211,上記節形成凸部21Cの頂点部210,上記平坦凹部22Aにおける15mm以上の直交方向Wの幅を有する底面221及びこの平坦凹部22Aに隣接する木目形成凸部21の内側壁面215には,上記淡色の第1塗料30からなる下側塗料層3が露出した露出表面101を形成した。一方で,上記建築板1の意匠表面201において,露出表面101を形成した以外の部分には,下側塗料層3の表面を上記濃色の第2塗料40からなる上側塗料層4で覆った被覆表面102を形成した。
【0077】
そして,上記建築板1の意匠表面201においては,上記木目凹凸模様203の各木目形成凸部21だけにおいて,また各凹部22だけにおいても,下側塗料層3による淡色の色外観を呈する露出表面101と,上側塗料層4による濃色の色外観を呈する被覆表面102とが混在している。そのため,建築板1の意匠表面201は,従来のように各部(凹凸)の意匠表面突出高さHの違いに対応して異なる色外観を呈するのではなく,各木目形成凸部21だけにおいて,また各凹部22だけにおいても異なる色外観を呈することができる。
また,上記節形成凸部21Cの形成により,上記建築板1は,あたかも実際の木材より製作した木材板であるかのような複雑でリアリティのある意匠外観を呈することができる。
【0078】
また,上記各木目形成凸部21には傾斜角度の異なる各内側壁面215及び各外側壁面216を形成し,各内側壁面215は上記木目調の中心側Cを向く明確な方向性を有して形成したことにより,緩傾斜状の各内側壁面215には光が照射され易く,各外側壁面216には光が照射され難い状態を形成することができる。また,上記露出表面101は各内側壁面215にのみ形成したことにより,各内側壁面215は明るい外観を呈し,各外側壁面216は暗い外観を呈することができる。そのため,建築板1の意匠表面201の各木目形成凸部21には,意図的に陰影効果を発揮させることもできる。
それ故,上記建築板1の意匠表面201は,より複雑であると共に,リアリティのある立体的な木目調の意匠外観を呈することができる。
【図面の簡単な説明】
【図1】実施例における,建築板の意匠表面における木目形成凸部及び凹部を拡大して示す断面説明図。
【図2】実施例における,建築板の意匠表面における節形成凸部の形成部位を拡大して示す断面説明図。
【図3】実施例における,建築板の意匠表面を示す平面図。
【図4】実施例における,樹木を挽いたときの切断断面の状態を示す説明図。
【図5】実施例における,木目調の中心側を一方向側に有する他の建築板の意匠表面における木目形成凸部及び凹部を拡大して示す断面説明図。
【図6】実施例における,木目形成凸部の一部を分断するよう形成した節形成凸部を示す平面図。
【図7】実施例における,木目形成凸部同士の間に形成した節形成凸部を示す平面図。
【図8】実施例における,建築板を横方向又は縦方向に並べて施工した状態を示す断面説明図。
【図9】実施例における,セメント系原板の一部を拡大して示す断面説明図。
【図10】実施例における,セメント系原板の意匠表面を示す平面図。
【図11】実施例における,下側塗料層を形成したセメント系原板の一部を拡大して示す断面説明図。
【図12】実施例における,塗料の掻取り装置を示す説明図。
【図13】実施例における,第2塗料を塗布したセメント系原板の意匠表面に,掻取りロールを当接させた状態の一部を拡大して示す断面説明図。
【図14】実施例における,セメント系原板の意匠表面における平坦凸部の略平坦面及び平坦凹部の底面から第2塗料を掻き取った状態を拡大して示す断面説明図。
【図15】実施例における,セメント系原板の意匠表面における節形成凸部の略平坦面から第2塗料を掻き取った状態を拡大して示す断面説明図。
【符号の説明】
1...建築板,
101...露出表面,
102...被覆表面,
2...セメント系原板(原板),
201...意匠表面,
202...裏面,
203...木目凹凸模様,
21A...平坦凸部(木目形成凸部),
21B...曲状凸部(木目形成凸部),
21C...節形成凸部,
210...頂点部,
211...略平坦面,
212...曲状端部,
213...節凹部,
215...内側壁面,
216...外側壁面,
22A...平坦凹部(凹部),
22B...曲状凹部(凹部),
221...底面,
222...曲状面,
223...微細凹部,
24...模様形成領域,
25...目地溝,
3...下側塗料層,
30...第1塗料,
4...上側塗料層,
40...第2塗料,
C...中心側,
D...他方側,
51...掻取りロール,
[0001]
【Technical field】
The present invention relates to a building board to be constructed as an outer wall of a building, and more particularly to a building board formed by painting on a design surface on which a concavo-convex pattern is formed, and a method for manufacturing the same.
[0002]
[Prior art]
For example, in a building board that is mass-produced for construction as an outer wall of a building, in order to avoid a monotonous finish, the design surface unevenness pattern of the building board, how to paint this design surface, etc. have been devised. Yes. For example, as shown in Patent Documents 1 and 2, efforts are made so that the design surface exhibits a natural appearance or a three-dimensional appearance.
[0003]
In Patent Document 1, the design surface of a building board has a flat portion and a pattern concave portion formed by depression from the flat portion. By changing the color tone of the flat convex portion and the pattern concave portion, It forms a building board with a natural appearance on the surface.
Moreover, in patent document 2, the uneven | corrugated pattern which shows a woodgrain is formed in the design surface of a building board, and the design surface exhibits a three-dimensional appearance by making the color of the convex part and the recessed part in this uneven pattern differ. Forms a building board.
[0004]
[Patent Document 1]
JP-A-11-310485
[Patent Document 2]
Japanese Patent Laid-Open No. 10-317631
[0005]
[Problems to be solved]
However, in the building board of Patent Document 1, the color difference expressed on the surface of the design is formed corresponding to the depression of the pattern recess in the flat portion. That is, this color tone difference is formed because the design surface protrusion height of the pattern recess is lower than that of the flat portion.
[0006]
Moreover, in the building board of the said patent document 2, the difference in the color expressed on the said design surface is formed corresponding to the protrusion of the convex part in the said uneven | corrugated pattern. That is, this color difference is formed by the design surface protrusion height of the convex portion being higher than that of the concave portion.
Therefore, the color tone or color change in the conventional building board is formed corresponding to the difference in the design surface protrusion height of each part on the design surface of the building board. Therefore, further ingenuity is required to form a more complicated design appearance on the design surface of the building board.
[0007]
The present invention has been made in view of such conventional problems, and can have a different color appearance only in the grain-forming convex part of the grain-concave pattern, or in the concave part alone, and a more complex wood-grained design appearance. It is intended to provide a building board capable of presenting and a manufacturing method thereof.
[0008]
[Means for solving problems]
A first invention is an architectural board in which a lower paint layer and an upper paint layer are sequentially provided on the design surface of an original board having a grainy uneven pattern formed by forming a plurality of grain forming convex parts for presenting a grain of wood. ,
The upper paint layer is made of a paint darker than the paint constituting the lower paint layer,
The substantially flat surface having a width of 1 mm or more formed at the apex portion of the wood grain forming convex part and the bottom surface having a width of 15 mm or more formed in a concave part positioned between the wood grain forming convex parts, The building board is characterized in that an exposed surface from which the lower paint layer is exposed is formed (Claim 1).
[0009]
The building board of the present invention has an upper paint layer made of a paint darker than the paint constituting the lower paint layer on the surface of the lower paint layer.
The substantially flat surface having a width of 1 mm or more formed at the apex portion of the grain forming convex portion and the bottom surface having a width of 15 mm or more formed in the concave portion are paints constituting the upper paint layer. An exposed surface formed by exposing the lower paint layer composed of a lighter color paint is formed. In addition, in the remaining part of the grain forming convex part and the concave part where the exposed surface is not formed, a covering surface is formed in which the surface of the lower paint layer is covered with the upper paint layer of the dark paint.
[0010]
Specifically, the covering surface is formed on a substantially flat surface having a width of less than 1 mm formed at the apex portion of the grain forming convex portion and a bottom surface having a width of less than 15 mm formed in the concave portion. ing.
Here, the width refers to a width in a cross-section in an orthogonal direction orthogonal to the wood grain forming direction.
Moreover, the substantially flat surface is not formed at the apex portion of the grain forming convex portion, and an acute-angled curved end portion may be formed. In this case, the coating surface is formed at the curved end.
[0011]
On the design surface of the building board of the present invention, the exposed surface exhibiting a light color appearance by the lower paint layer only in the grain-forming convex part of the grainy concavo-convex pattern or only in the concave part, and the upper paint layer Mixed with a coated surface exhibiting a dark color appearance. Therefore, the design surface of the building board of the present invention does not exhibit a different color appearance corresponding to the difference in the design surface protrusion height of each part (unevenness) as in the prior art, but only on the grain forming convex part, and also on the concave part. Alone can give a different color appearance. Therefore, the design surface of the building board of the present invention can exhibit a more complex wood grain design appearance.
[0012]
2nd invention prepares the original plate which has the design surface formed by forming the grain uneven pattern by the plurality of grain formation convex parts for presenting the grain tone,
A lower paint layer forming step in which a first paint is applied to the design surface of the original plate and dried to form a lower paint layer;
An upper paint layer forming step of forming an upper paint layer by applying a second paint darker than the first paint on the surface of the lower paint layer;
Before the second coating material is dried, the second coating material is scraped off on a substantially flat surface having a width of 1 mm or more at the apex portion of the wood grain formation convex portion, and the concave portion located between the wood grain formation convex portions. Scraping the second paint on the bottom surface having a width of 15 mm or more in the step, and forming a substantially flat surface in the grain forming convex part and an exposed surface in which the lower paint layer is exposed on the bottom surface in the concave part; In the manufacturing method of the building board characterized by performing (Claim 7).
[0013]
In the production method of the present invention, the above-described preparatory step, the lower paint layer forming step, the upper paint layer forming step, and the scraping step are performed to efficiently produce a building board having the above-described excellent effects. can do.
Then, by performing each of the above steps, the upper paint layer is formed on the substantially flat surface having a width of 1 mm or more at the apex portion of the grain forming convex portion and the bottom surface having a width of 15 mm or more in the concave portion. An exposed surface is formed by exposing the lower paint layer formed of a lighter color paint than the paint to be applied. Further, in the remaining portion of the grain forming convex part and the concave part where the exposed surface is not formed, a covering surface is formed in which the surface of the lower paint layer is covered with the upper paint layer of the dark paint.
[0014]
Thus, similar to the above-described invention, on the design surface of the building board, the exposed surface exhibiting a light color appearance by the lower paint layer only on the grain-forming convex part and only on the concave part, and the upper paint layer Mixed with a coated surface exhibiting a dark color appearance.
For this reason, according to the manufacturing method of the present invention, a different color appearance can be exhibited only in the grain-forming convex part of the grain-concave pattern, or only in the concave part, and a more complicated wood-grained design appearance can be exhibited. A board can be manufactured efficiently.
[0015]
In the scraping step, the reason why the exposed surface can be formed on the substantially flat surface having a width of 1 mm or more at the apex portion of the grain forming convex portion and the bottom surface having a width of 15 mm or more in the concave portion is as follows. Think like that.
That is, a substantially flat surface having a width of less than 1 mm is also formed at the apex of the wood grain forming convex portion. The substantially flat surface having a width of 1 mm or more in the wood grain forming convex portion contacts the scraper with a larger contact area than the substantially flat surface having a width of less than 1 mm. Therefore, at the time of this contact, it is considered that the second paint applied to the substantially flat surface having a width of 1 mm or more in the grain forming convex portion adheres to the scraping tool and is scraped off to form the exposed surface.
[0016]
On the other hand, the substantially flat surface having a width of less than 1 mm in the grain forming convex portion has a smaller contact area in contact with the scraper than the substantially flat surface having a width of 1 mm or more. For this reason, even when the second paint applied to the substantially flat surface having a width of less than 1 mm in the grain forming convex portion adheres to the scraping tool and is scraped off at the time of this contact, It is considered that the coated surface is formed by filling the formed portion with the surrounding second paint. In addition, the second paint applied to the substantially flat surface having a width of less than 1 mm in the grain forming convex portion is pulled to the substantially flat surface without being scraped off by the scraping tool. I think that it may remain.
[0017]
In addition, a bottom surface having a width of less than 15 mm is formed in the recess. And the bottom face which has the width | variety of 15 mm or more in the said recessed part can contact | abut on a scraper with the large width | variety. Therefore, at the time of this contact, it is considered that the second paint applied to the bottom surface having a width of 15 mm or more in the recess adheres to the scraping tool and is scraped off to form the exposed surface.
[0018]
On the other hand, the bottom surface having a width of less than 15 mm in the concave portion often does not come into contact with the scraper due to its narrow width. Therefore, at the time of this contact, the second paint applied to the bottom surface having a width of less than 15 mm in the recess remains on the bottom surface without adhering to the scraping tool, and forms the above-mentioned coated surface.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention described above will be described.
In the first and second inventions described above, the upper limit of the width of the substantially flat surface at the apex of the grain-forming convex part forming the exposed surface is considered from the appearance design of the grain-like pattern formed on the design surface of the building board. And preferably less than 15 mm.
Further, when the width of the substantially flat surface at the apex of the grain-forming convex portion that forms the exposed surface is less than 1 mm, it is difficult to form the exposed surface.
[0020]
In addition, the upper limit of the width of the bottom surface of the concave portion in which the exposed surface is formed is preferably less than 50 mm in consideration of the external appearance design of the wood grain formed on the design surface of the building board.
In addition, when the width of the bottom surface of the recess having the exposed surface is less than 15 mm, it is difficult to form the exposed surface.
Moreover, it is preferable that the height to the vertex part of the said grain formation convex part with respect to the bottom face of the said recessed part shall be 0.5-3 mm.
[0021]
In the first invention, the exposed surface may be a part of the paint after the paint for forming the upper paint layer is applied to the surface of the lower paint layer and before the paint is dried. It is preferably formed by removing (Claim 2).
In this case, the exposed surface can be formed by applying a paint for forming the upper paint layer on the surface of the lower paint layer and then removing a part of the paint. Therefore, the exposed surface can be easily and efficiently formed without performing special coating or the like.
[0022]
The paint can be removed by bringing a scraping tool into contact with the design surface of the building board to which the paint constituting the upper paint layer is applied and scraping off a part of the paint. In this case, the above-mentioned exposure is performed by utilizing that the substantially flat surface having a width of 1 mm or more in the grain forming convex portion abuts the scraper with a larger contact area than the substantially flat surface having a width of less than 1 mm. A surface can be formed.
Further, the exposed surface can be formed by utilizing the fact that the bottom surface having a width of 15 mm or more in the recess contacts the scraping tool and the bottom surface having a width of less than 15 mm does not contact the scraping tool.
[0023]
Moreover, it is preferable that the said grain uneven | corrugated pattern has the said grain formation convex part and the node formation convex part for exhibiting a node part (Claim 3).
In this case, not only the substantially flat surface having a width of 1 mm or more at the apex portion of the grain forming convex portion but also the substantially flat surface having a width of 1 mm or more formed at the apex portion of the node forming convex portion. The exposed surface can be formed. For this reason, the building board can exhibit a realistic design appearance similar to that of actual wood by the grain-forming projections and the knot-forming projections.
[0024]
Further, the design surface of the building board has a pattern forming area in which the wood grain uneven pattern is formed, and a joint groove recessed from the pattern forming area, and the lower coating layer is formed in the joint groove. It is preferable that a coating surface in which the upper coating layer covers the surface is formed.
In this case, in the building board having the pattern formation region and the joint groove, the grain surface unevenness pattern in the pattern formation region is formed by forming the covering surface on the joint groove so that the joint groove is not conspicuous. The exposed surface formed can be made to stand out.
[0025]
The joint groove may be formed with the intention of making the joints between the building boards inconspicuous when a plurality of building boards are arranged horizontally or vertically on the outer wall of the building. it can. That is, the joint groove forms the bottom and one side wall of the joint groove at one end of the building board, and the other side wall of the joint groove forms at the other end of the building board. , It can be configured to form one joint groove when building boards are arranged in the horizontal or vertical direction (see FIG. 8). In addition, the joint groove can be formed between the both ends of the building board with a predetermined interval.
[0026]
In addition, each of the grain-forming convex portions has a gentler inner wall surface located on the center side of the grain tone than an outer wall surface located on the other side in a cross section perpendicular to the grain-tone formation direction. It is preferably formed in a gently inclined shape (claim 5).
[0027]
By the way, the above-mentioned wood grain tone refers to an appearance that is substantially the same as or similar to the appearance exhibited by the annual rings formed inside the tree in the cross section of the tree. The center side of the wood grain is the center of the tree to be expressed in this wood grain, that is, the side with the pith of the tree. Therefore, the center side of the wood grain is not necessarily located at the center side of the design surface, and may be located at the end of the design surface in some cases.
Further, the direction in which the wood grain is formed refers to the longitudinal direction of the tree to be expressed by the wood grain (the direction in which the tree extends).
[0028]
In the above case, the inner wall surface of each grain-forming convex portion is formed with a clear direction toward the center of the grain, and light is applied to the gently inclined inner wall surface. It is easy to form a state in which light is not easily irradiated on the outer wall surface. For this reason, the inner wall surface facing the center side of the wood grain tone can exhibit a bright appearance, and the outer wall surface facing the other side opposite to the center side can exhibit a dark appearance.
Therefore, the shading effect can be intentionally exerted on each grain-forming convex part on the design surface of the building board, and the building board can exhibit a realistic three-dimensional wood-tone design appearance.
[0029]
Moreover, it is preferable that the exposed surface is formed on the inner wall surface of each of the grain forming convex portions.
In this case, the inner wall surface has a brighter appearance due to the lower paint layer made of the light-colored paint, while the outer wall surface has a darker appearance due to the upper paint layer made of the dark-colored paint. Can be presented. Therefore, a clearer shading effect can be exerted on each of the grain-forming convex portions, and the building board can exhibit a more realistic three-dimensional grain-like design appearance.
[0030]
In the first and second aspects of the invention, the exposed surface may be formed by applying the paint for forming the upper paint layer on the surface of the lower paint layer, and before the paint is dried. A scraper can be brought into contact with any of the forming convex portions. In this case, the exposed surface can be formed more easily and efficiently without requiring any special device for the scraper.
[0031]
【Example】
Below, the Example concerning the building board of this invention and its manufacturing method is demonstrated using drawing.
As shown in FIGS. 1 to 3, the building board 1 of the present example is placed on the design surface 201 of the original board 2 having a wood grain uneven pattern 203 formed with a number of wood grain forming convex portions 21 for presenting a wood grain tone. The side paint layer 3 and the upper paint layer 4 are sequentially provided. The upper paint layer 4 is composed of a dark second paint 40 having a darker color than the light first paint 30 constituting the lower paint layer 3.
[0032]
Each of the grain-forming convex portions 21 has a flat convex portion 21A formed by forming a substantially flat substantially flat surface 211 at the vertex portion 210 and an acute-angled curved end portion 212 at the vertex portion 210. And a curved convex portion 21B. Further, each concave portion 22 positioned between the respective grain-forming convex portions 21 has a flat concave portion 22A formed with a substantially flat bottom surface 221 and a curved shape formed with a curved curved surface 222. There is a recess 22B.
[0033]
The substantially flat surface 211 of the flat convex portion 21A having a width of 1 mm or more in the orthogonal direction W perpendicular to the direction of formation of the wood grain (long direction of wood grain) L by the wood grain forming convex portion 21 includes An exposed surface 101 where the lower paint layer 3 is exposed is formed. In addition, on the substantially flat surface 211 of the flat convex portion 21A whose width in the orthogonal direction W is less than 1 mm, a covering surface 102 is formed in which the surface of the lower paint layer 3 is covered with the upper paint layer 4. .
[0034]
An exposed surface 101 where the lower paint layer 3 is exposed is formed on the bottom surface 221 of the flat recess 22A having a width in the orthogonal direction W of 15 mm or more. Further, the covering surface 102 is formed on the bottom surface 221 of the flat recess 22A whose width in the orthogonal direction W is less than 15 mm.
The covering surface 102 is also formed on the curved convex portion 21B and the curved concave portion 22B.
[0035]
This is described in detail below.
As shown in FIGS. 1 to 3, the building board 1 of this example is a ceramic building board 1 that can be mass-produced, but has a grainy uneven appearance that approximates the appearance of a cut surface when wood is ground. It is.
1 and 2 are cross-sectional explanatory views of the building board 1 observed by cutting in the orthogonal direction W orthogonal to the wood grain tone forming direction (long direction) L. FIG. Since these drawings are schematic diagrams for explanation, the number of grain forming convex portions 21 and concave portions 22 is actually formed more than the number shown in these drawings.
[0036]
As shown in FIGS. 1 and 2, the substantially flat surface 211 of the flat convex portion 21 </ b> A does not necessarily need to be flat, and may be formed to be slightly curved in an arc convex shape.
Further, the bottom surface 221 of the flat recess 22A is not necessarily flat and may be formed to be slightly bent.
[0037]
Each grain-forming convex portion 21 that is the flat convex portion 21A or the curved convex portion 21B represents a late-wood portion of an annual ring in the wood (tree) to be expressed by the building board 1, and the flat concave portion Each concave portion 22 which is 22A or the curved concave portion 22B represents the early material portion of the annual ring.
The early wood part refers to the part of the annual ring formed in one year that can be grown early in the spring to early summer, and the late part is the period when tree growth is slow after early summer. The part that can be made.
Each grain-forming convex portion 21 of the present example protrudes from each concave portion 22 in correspondence with the fact that the hardness of the latewood portion is harder than the hardness of the earlywood portion in the wood (tree) that has the appearance of the annual rings. And formed.
[0038]
Further, as shown in FIGS. 1 and 2, each of the grain forming convex portions 21 has an inner wall surface 215 located on the center side C of the grain tone on the other side D in the cross section in the orthogonal direction W. The outer wall surface 216 is formed to have a gentler slope than the outer wall surface 216.
The center side C of the wood grain refers to the center O of the tree to be expressed in this wood grain, that is, the side where the pith O of the tree is located (see FIG. 4).
The inner wall surface 215 represents a state of an annual ring when the early wood portion is changed from the early wood portion to the late wood portion in the process of forming the annual ring of the tree, and the outer wall surface 216 is formed from the late wood portion to the early wood portion. It represents the state of the annual rings when changing to.
[0039]
That is, the inner wall surface 215 is formed corresponding to the gradually increasing hardness of the annual ring when the early material portion changes from the early material portion to the late material portion, and the outer wall surface 216 is formed from the late material portion to the early material. When changing to a part, it is formed in response to a sudden decrease in the hardness of the annual ring.
The inner wall surface 215 and the outer wall surface 216 are both formed in an inclined shape, and the inclination angle of the inner wall surface 215 is formed more gently than the inclination angle of the outer wall surface 216.
[0040]
As shown in FIG. 1 to FIG. 3, each of the grain forming convex portions 21 and the concave portions 22 includes a grid forming portion 205 for presenting a grain portion in a wood grain tone and a grain formation for exhibiting a grain portion in a wood grain tone. It is formed as a part 206. And most of the flat convex portions 21 </ b> A having the substantially flat surface 211 having the width in the orthogonal direction W of 1 mm or more are formed in the plate forming portion 206. On the other hand, most of the flat convex portion 21A provided with the substantially flat surface 211 having a width in the orthogonal direction W of less than 1 mm and the curved convex portion 21B provided with the curved end portion 212 are substantially the same as the mesh forming portion 205. Is formed.
[0041]
Further, most of the flat concave portion 22 </ b> A having the bottom surface 221 having the width in the orthogonal direction W of 15 mm or more is formed in the plate forming portion 206. On the other hand, most of the flat concave portion 22A having the bottom surface 221 having the width in the orthogonal direction W less than 15 mm and the curved concave portion 22B having the curved surface 222 are formed in the mesh forming portion 205. .
[0042]
Further, as shown in FIG. 3, the mesh forming portion 205 is formed by forming the grain forming convex portions 21 constituting the elongated shape in a state of being nearly parallel to each other. On the other hand, the grain forming portion 206 is formed by forming each grain-forming convex portion 21 constituting this into a long shape, and in the direction of the grain tone forming direction L, such as a mountain shape or a wave shape. The irregular shape is formed.
[0043]
As shown in FIGS. 1 and 2, the exposed surface 101 is formed on the inner wall surface 215 of each grain-forming convex portion 21 in the grain-forming portion 206. In this example, the exposed surface 101 is formed on the inner wall surface 215 of the flat convex portion 21A having the substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more.
On the other hand, the covering surface 102 is formed on the outer wall surface 216 of each grain forming convex portion 21 in the grain forming portion 206. In addition, the covering surface 102 is formed on the inner wall surface 215 and the outer wall surface 216 of each grain forming convex portion 21 in the mesh forming portion 205.
[0044]
In addition, as shown in FIG. 1, any flat concave portion 22 </ b> A having a bottom surface 221 having a width in the orthogonal direction W of 15 mm or more in the plate-forming portion 206 has a number of microscopic portions further depressed than the bottom surface 221. A recess 223 is formed. The exposed surface 101 is formed on the bottom surface 221 of the flat recess 22A having a width in the orthogonal direction W of 15 mm or more, and the covering surface 102 is formed on the numerous minute recesses 223. .
[0045]
Further, in this example, the width in the orthogonal direction W is 15 mm or less at the maximum on the substantially flat surface 211 of each of the above-described grain-forming convex portions 21. Further, the width in the orthogonal direction W is 50 mm or less at the maximum in the bottom surface 221 of each of the recesses 22.
In addition, the cross-sectional shape in the orthogonal direction W of each of the wood grain forming convex portions 21 is not constant toward the grain tone forming direction L, and changes in a complicated manner. Along with this, the cross-sectional shape in the orthogonal direction W of each of the recesses 22 is not constant toward the grain-forming direction L, and changes in a complicated manner.
[0046]
FIG. 4 is a view showing an appearance that appears in a cut section when a tree is ground along the longitudinal direction in which the tree extends. Then, as shown in the figure, the uneven pattern 203 of the grain in the building board 1 of this example is a grain forming part 206 and a grid forming part 205 that appear when it is ground at a position X1 shifted from the center (medullary) O of the tree. It expresses the appearance of the mixture.
On the other hand, the grain uneven pattern 203 can also represent the appearance of only the mesh forming part 205 that appears when grinding through the position X0 of the center (medullary) O of the tree or the position X0 in the vicinity thereof.
[0047]
Further, as shown in FIG. 5, in the building board 1, the wood grain unevenness pattern 203 can represent the appearance of the left or right annual rings of the cut section along the longitudinal direction of the tree. In this case, the center side C of the wood grain tone becomes the one-direction side C in the building board 1, and each grain-forming convex portion 21 has the inner wall surface 215 on the one-direction side C and the one-way side C. It has the said outer side wall surface 216 in the other direction side D on the opposite side.
[0048]
Further, as shown in FIG. 3, the wood grain uneven pattern 203 includes each wood grain forming convex portion 21 for exhibiting the wood grain tone and a node forming convex portion 21C for exhibiting a node portion. Here, the nodal part is a part formed by branches being wrapped in the trunk during the growth process of trees.
In this example, the design surface 201 of the building board 1 has a grainy uneven appearance in which the late wood part of the annual ring of the wood (tree) projects and the node of the wood (tree) projects. are doing.
[0049]
And the node formation convex part 21C is formed with various forms as follows.
That is, as shown in FIG. 6, one form of the node forming convex portion 21 </ b> C is formed so as to divide the plurality of wood forming convex portions 21 in the mesh forming portion 205.
Further, as shown in FIG. 7, another form of the node forming convex portion 21 </ b> C is formed between the wood forming convex portions 21 in the plate forming portion 206.
In addition, the said node formation convex part 21C may be formed in various annular shapes in the design surface 201 of the said building board 1, and may be formed in the state parted by the edge part of the said design surface 201. .
[0050]
As shown in FIGS. 2, 6, and 7, a node recess 213 is formed in the node forming protrusion 21C. The node recess 213 is recessed from the apex 210 of the node forming protrusion 21C. The node forming convex portion 21C has a substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more at the apex portion 210, and the exposed surface 101 is formed on the substantially flat surface 211. . On the other hand, the covering surface 102 is formed in the node recess 213.
[0051]
Further, the exposed surface 101 formed on each of the grain forming convex portions 21A, 21B, each concave portion 22 and the node forming convex portion 21C is a second for forming the upper paint layer 4 on the surface of the lower paint layer 3. After the coating material 40 is applied and before the second coating material 40 is dried, a part of the second coating material 40 is scraped off with a scraper.
The lower paint layer 3 is formed using a light first paint 30, and the upper paint layer 4 is formed using a dark second paint 40 having a darker color than the first paint 30. It is a thing.
[0052]
The color has three attributes of hue, lightness, and saturation. In this example, the first paint 30 and the second paint 40 are composed of paints of similar colors having substantially the same hue, and are used as colors. Consists of paints with different brightness.
In addition, you may comprise the 1st coating material 30 and the 2nd coating material 40 by varying the saturation as a color.
Further, when the coating surface 30, 40 is applied to the design surface 201 of the original plate 2, the first coating material 30 and the second coating material 40 having substantially the same pigment (hue) are used as one set. The set of 30, 40 can be prepared and used for various dyes.
[0053]
As shown in FIGS. 3 and 8, the design surface 201 of the building board 1 has a pattern formation region 24 in which the wood grain unevenness pattern 203 is formed and a joint groove 25 in which the pattern formation region 24 is depressed. are doing. In the joint groove 25, a covering surface 102 is formed by the upper paint layer 4.
In the present example, the joint groove 25 includes a vertical joint groove 25 </ b> A formed along the longitudinal direction L of the building board 1 and a horizontal joint groove 25 </ b> B formed along the orthogonal direction W.
[0054]
Further, as shown in FIG. 8, a bottom surface 251 and one side wall 252 of the vertical joint groove 25 </ b> A are formed at one end E of the building board 1, and an end F on the other side of the building board 1 is formed. The other side wall 253 of the vertical joint groove 25A is formed. And when the building board 1 is arranged in the horizontal direction or the vertical direction and it constructs on the outer wall of a building, one vertical joint groove 25A can be formed. Further, the vertical joint grooves 25A are also formed at one place or a plurality of places between the both end portions E and F of the building board 1 with a predetermined interval.
Further, by forming the covering surface 102 in the joint groove 25, when the plurality of building boards 1 are arranged in the horizontal direction or the vertical direction, the joint 109 between the building boards 1 is made inconspicuous. , The complicated design appearance by the exposed surface 101 can be emphasized.
[0055]
Below, the manufacturing method of the building board 1 formed by forming the exposed surface 101 by the said upper side coating layer 4 on the design surface 201 is demonstrated.
In the manufacturing method of the building board 1 of the present example, the building board 1 is manufactured by performing the following preparation process, lower paint layer forming process, upper paint layer forming process, scraping process, and clear layer forming process.
That is, as shown in FIGS. 9 and 10, in the preparation step, the original plate 2 having the design surface 201 formed with the wood grain uneven pattern 203 is prepared. The grainy uneven pattern 203 on the original plate 2 includes a plurality of grain forming convex parts 21A and B for exhibiting a wood grain tone, and a node forming convex part 21C for exhibiting a node part in the grain tone.
[0056]
The original plate 2 in this example is a mixed raw material obtained by mixing a cementitious raw material (cement, silicic acid raw material, etc.), a wooden raw material (wood fiber, wood chip, etc.), an additive and water, etc. It is the cement-type original plate 2 which was spread and molded (formed) on the surface.
A large number of grain-forming convex portions 21A, B and one or a plurality of node-forming convex portions 21C are formed on the design surface 201 of the cement-based original plate 2. In addition, the design surface 201 of the cement-based original plate 2 was formed so that the design surface protrusion heights H of the entire grain-forming convex portions 21A, 21B and the node-forming convex portions 21C were substantially the same.
[0057]
The design surface protrusion height H in this example is the vertex 210 of the grain-forming convex portions 21A, 21B or the vertex portion 210 of the node-forming convex portion 21C from the back surface 202 of the cement base plate 2 as shown in FIG. It means the height (thickness) H.
Further, the design surface 201 of the cement-based original plate 2 is the height from the bottom surface 221 of each of the recesses 22 to the vertex part 210 of each of the grain formation convex parts 21A, B and the node formation convex part 21C (each grain formation convex part 21A, B and the depth (I) from the apex portion 210 of the node forming convex portion 21C to the bottom surface 221 of each concave portion 22 were formed to be approximately 0.7 mm.
[0058]
Further, as shown in FIG. 10, on the design surface 201 of the cement-based master plate 2, a mesh forming portion 205 that exhibits the appearance of the wood grain-like mesh portion and a grain formation that exhibits the appearance of the wood-grained texture portion. By the portion 206 and the node forming convex portion 21C exhibiting the appearance of the above-mentioned node portion, a complicated and realistic uneven appearance that approximates the appearance of wood is formed.
[0059]
Next, as shown in FIG. 11, in the lower paint layer forming step, the first paint 30 is applied to the design surface 201 of the cement-based original plate 2 and the first paint 30 is dried. Then, the lower coating layer 3 is formed on the entire design surface 201 of the cement-based original plate 2, that is, the entire pattern forming region 24 in which the wood grain uneven pattern 203 is formed and the joint groove 25.
[0060]
Next, in the upper paint layer forming step, the second paint 40 is applied to the surface of the lower paint layer 3 to form the upper paint layer 4. In this example, a water-based paint is used for the second paint 40.
In the scraping step, as shown in FIG. 12, a scraping roll 51 serving as a scraping tool that comes into contact with the design surface 201 of the cement base plate 2 and scrapes a part of the second paint 40, and the scraping roll 51 A scraping device 5 having a backup roll 52 disposed opposite to the roll 51 and abutting against the back surface 202 of the cement-based original plate 2 is used.
[0061]
When the cement-based original plate 2 is carried into the gap 53 between the scraping roll 51 and the backup roll 52, the cement-based original plate 2 coated with the second paint 40 is applied to the roll surface 510 of the scraping roll 51. , The back surface 202 of the cement-based original plate 2 contacts the roll surface 520 of the backup roll 52.
[0062]
Then, as shown in FIG. 13, in the scraping step, before the applied second paint 40 is dried, a scraping roll 51 is applied to the design surface 201 of the cement-based original plate 2 to which the second paint 40 is applied. Make contact.
At this time, as shown in the figure, since the design surface protrusion height H of each of the grain-forming convex portions 21A, 21B and the node-forming convex portion 21C is formed to be substantially the same, the roll of the scraping roll 51 The surface 510 abuts on any of the grain formation convex portions 21A and 21B and the node formation convex portion 21C.
[0063]
At this time, as shown in FIG. 13, the roll surface 510 of the scraping roll 51 also contacts the bottom surface 221 having a width in the orthogonal direction W of 15 mm or more in the flat recess 22A. Further, the roll surface 510 of the scraping roll 51 also contacts the inner wall surface 215 of the wood grain forming convex portion 21 adjacent to the flat concave portion 22A having the bottom surface 221 having a width in the orthogonal direction W of 15 mm or more.
[0064]
And as shown in FIG. 14, the 2nd coating material 40 apply | coated to the substantially flat surface 211 which has the width | variety of the orthogonal direction W of 1 mm or more in the flat convex part 21A as the said grain formation convex part 21 is the scraping roll 51. It adheres to the roll surface 510 and is scraped off.
Further, as shown in FIG. 14, the second paint 40 applied to the bottom surface 221 having a width in the orthogonal direction W of 15 mm or more in the flat concave portion 22A and the inner wall surface 215 of the wood grain forming convex portion 21 adjacent to the flat concave portion 22A. Also, it adheres to the roll surface 510 of the scraping roll 51 and is scraped off.
Further, as shown in FIG. 15, the second paint 40 applied to the apex portion 210 of the node forming convex portion 21 </ b> C also adheres to the roll surface 510 of the scraping roll 51 and is scraped off.
[0065]
As shown in FIGS. 1 and 2, the scraped flat convex portion 21A has a substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more, the apex portion 210 of the node forming convex portion 21C, and the flat portion. An exposed surface 101 where the lower coating layer 3 is exposed is formed on the bottom surface 221 having a width in the orthogonal direction W of 15 mm or more in the concave portion 22A and the inner wall surface 215 of the wood grain forming convex portion 21 adjacent to the flat concave portion 22A. The
[0066]
On the other hand, the remaining part of the grainy uneven pattern 203 that has not been scraped is formed with a covering surface 102 in which the surface of the lower paint layer 3 is covered with the upper paint layer 4 of the second paint 40. The That is, the substantially flat surface 211 having a width in the orthogonal direction W of less than 1 mm in the flat convex portion 21A, the curved convex portion 21B, the node concave portion 213 in the node forming convex portion 21C, and less than 15 mm in the flat concave portion 22A. A covering surface 102 is formed on the bottom surface 221 having the width in the orthogonal direction W, the curved concave portion 22B, the fine concave portion 223, the outer wall surface 216 of the grain forming convex portion 21, and the like.
[0067]
In particular, the substantially flat surface 211 having a width in the orthogonal direction W of less than 1 mm in the flat convex portion 21 </ b> A, and the second paint 40 applied to the curved convex portion 21 </ b> B abuts on the roll surface 510 of the scraping roll 51. However, it remains on the design surface 201 without being scraped off by the scraping roll 51.
[0068]
As described above, the reason why the exposed surface 101 is formed on the substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more in the flat convex portion 21A is that the substantially flat surface 211 in the flat convex portion 21A is relatively wide. This is considered to be due to the contact with the scraping roll 51 at the contact area. That is, in order to scrape off the second paint 40 applied to the design surface 201 of the cement-based original plate 2 by the scraping roll 51, it is considered that the contact width with respect to the roll surface is 1 mm or more.
[0069]
The reason why the exposed surface 101 is formed on the vertex 210 of the node forming convex 21C is that the vertex 210 of the node forming convex 21C has a substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more. I think this is because of the formation. It is considered that this is because the substantially flat surface 211 of the node forming convex portion 21C is in contact with the scraping roll 51 with a relatively wide contact area.
[0070]
The reason why the exposed surface 101 is formed on the bottom surface 221 having a width in the orthogonal direction W of 15 mm or more in the flat recess 22A is that the bottom surface 221 in the flat recess 22A has a width in the orthogonal direction W of 15 mm or more. This is considered to be because it was possible to abut against the scraping roll 51 due to the large size, and to abut with a relatively wide (more than 15 mm) contact area during this abutment.
[0071]
The reason why the exposed surface 101 is formed on the inner wall surface 215 of the grain forming convex portion 21 adjacent to the flat concave portion 22A having the bottom surface 221 having the width in the orthogonal direction W of 15 mm or more is that the bottom surface of the flat concave portion 22A Since the width in the orthogonal direction W of 221 is as large as 15 mm or more, and the inner wall surface 215 of the grain-forming convex portion 21 is formed in a gentle gentle slope, the inner wall surface 215 of the grain-forming convex portion 21 is scraped off. This is considered to be because it was able to contact 51.
[0072]
On the other hand, the reason why the covering surface 102 is formed on the substantially flat surface 211 having a width in the orthogonal direction W of less than 1 mm in the flat convex portion 21A and the curved convex portion 21B is considered as follows. That is, although the substantially flat surface 211 and the curved convex portion 21B having the width in the orthogonal direction W of less than 1 mm are in contact with the scraping roll 51, the contact area is small. Therefore, even if the second paint 40 applied to the substantially flat surface 211 and the curved convex portion 21B adheres to the scraping roll 51 and is scraped off, the scraped portion is the first around it. 2 It is thought that this is because it was compensated by the paint 40.
[0073]
Further, the node recesses 213 in the node forming protrusions 21C, the bottom surfaces 221, the curved recesses 22B, the fine recesses 223, and the grain forming protrusions 21 having a width in the orthogonal direction W of less than 15 mm in the flat recesses 22A. The reason why the coating surface 102 is formed on the outer wall surface 216 or the like is considered to be because they do not contact the scraping roll 51.
[0074]
In addition to the width in the orthogonal direction W, the material of the scraping roll 51, the formation of the exposed surface 101 on each part of the grain forming convex parts 21A, B, the node forming convex part 21C, and the concave part 22 It is considered that the hardness of the roll surface 510 of the scraping roll 51 has some influence. In this example, the scraping roll 51 is composed of a sponge layer 511 made of a sponge material such as butyl sponge rubber, and a rubber material such as EPDM (ethylene propylene rubber) having a rubber hardness of about 50 degrees. A rubber layer 512 disposed on the outer peripheral side was used (see FIG. 12).
[0075]
Next, although illustration is omitted, after drying the cement-based original plate 2 on which the exposed surface 101 and the covering surface 102 are formed, the dried exposed surface 101 and the covering surface 102 are subjected to the clear layer forming step. Apply and dry a clear paint to form a clear paint layer. And the clear coating layer for improving a weather resistance etc. is formed in the outermost surface of the design surface 201 of the cement-type original board 2. FIG.
In this way, the building board 1 which forms the exposed surface 101 in each said flat convex part 21A, each flat recessed part 22A, and the node formation convex part 21C can be manufactured.
[0076]
Below, the effect in the said building board 1 and its manufacturing method is demonstrated.
As described above, in this example, the flat convex portion 21A has a substantially flat surface 211 having a width in the orthogonal direction W of 1 mm or more, the apex portion 210 of the node forming convex portion 21C, and the flat concave portion 22A of 15 mm or more orthogonal. On the bottom surface 221 having a width in the direction W and the inner wall surface 215 of the grain forming convex portion 21 adjacent to the flat concave portion 22A, an exposed surface 101 in which the lower coating layer 3 made of the light first coating material 30 is exposed is formed. did. On the other hand, in the design surface 201 of the building board 1, the surface of the lower paint layer 3 is covered with the upper paint layer 4 made of the dark second paint 40 except for the exposed surface 101. A coated surface 102 was formed.
[0077]
In the design surface 201 of the building board 1, the exposed surface exhibiting a light color appearance by the lower coating layer 3 only in each of the grain-forming convex portions 21 of the grain-concave pattern 203 and only in each of the concave portions 22. 101 and the coating surface 102 exhibiting a dark color appearance by the upper paint layer 4 are mixed. Therefore, the design surface 201 of the building board 1 does not exhibit a different color appearance corresponding to the difference in the design surface protrusion height H of each part (unevenness) as in the past, but only in each grain-forming convex part 21, Also, only the concave portions 22 can have different color appearances.
Moreover, the building board 1 can exhibit a complicated and realistic design appearance as if it is a wood board manufactured from actual wood by forming the node forming convex portions 21C.
[0078]
Further, the inner wall surfaces 215 and the outer wall surfaces 216 having different inclination angles are formed on each of the wood grain forming convex portions 21, and each inner wall surface 215 has a clear direction toward the center side C of the wood grain. As a result, it is possible to form a state in which light is easily irradiated to each inner wall surface 215 having a gentle slope, and light is not easily irradiated to each outer wall surface 216. Further, since the exposed surface 101 is formed only on each inner wall surface 215, each inner wall surface 215 can have a bright appearance, and each outer wall surface 216 can have a dark appearance. Therefore, each wood grain formation convex part 21 of the design surface 201 of the building board 1 can also intentionally exhibit a shadow effect.
Therefore, the design surface 201 of the building board 1 is more complicated and can exhibit a realistic three-dimensional woodgrain design appearance.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory cross-sectional view showing, in an enlarged manner, wood grain forming convex portions and concave portions on the design surface of a building board.
FIG. 2 is an explanatory cross-sectional view showing, in an enlarged manner, a portion where a node forming convex portion is formed on the design surface of a building board.
FIG. 3 is a plan view showing a design surface of a building board in the embodiment.
FIG. 4 is an explanatory diagram showing a state of a cut section when a tree is ground in the embodiment.
FIG. 5 is an explanatory cross-sectional view showing, in an enlarged manner, wood grain forming convex portions and concave portions on the design surface of another building board having a wood grain center side in one direction.
FIG. 6 is a plan view showing a node forming convex portion formed so as to divide a part of the grain forming convex portion in the embodiment.
FIG. 7 is a plan view showing a node forming convex portion formed between the grain forming convex portions in the embodiment.
FIG. 8 is a cross-sectional explanatory view showing a state in which construction boards are arranged in a horizontal direction or a vertical direction in an embodiment.
FIG. 9 is an explanatory cross-sectional view showing a part of the cement-based original plate in an enlarged manner.
FIG. 10 is a plan view showing a design surface of a cement-based original plate in an example.
FIG. 11 is an explanatory cross-sectional view showing, in an enlarged manner, a part of a cement-based original plate on which a lower paint layer is formed in an example.
FIG. 12 is an explanatory view showing a paint scraping device in an embodiment.
FIG. 13 is a cross-sectional explanatory view showing, in an enlarged manner, a part of a state in which a scraping roll is brought into contact with a design surface of a cement-based original plate to which a second paint is applied in an example.
FIG. 14 is an explanatory cross-sectional view showing, in an enlarged manner, a state in which the second paint is scraped off from the substantially flat surface of the flat convex portion and the bottom surface of the flat concave portion on the design surface of the cement-based original plate in the example.
FIG. 15 is a cross-sectional explanatory view showing, in an enlarged manner, a state in which the second paint has been scraped off from a substantially flat surface of a node forming convex portion on a design surface of a cement-based original plate in an example.
[Explanation of symbols]
1. . . Building board,
101. . . Exposed surface,
102. . . Coated surface,
2. . . Cement-based original plate (original plate),
201. . . Design surface,
202. . . Backside,
203. . . Wood grain uneven pattern,
21A. . . Flat convex part (wood grain forming convex part),
21B. . . Curved convex part (wood grain forming convex part),
21C. . . Knot forming convex part,
210. . . Vertex,
211. . . Substantially flat surface,
212. . . Curved end,
213. . . Knot recess,
215. . . Inner wall,
216. . . Outer wall,
22A. . . Flat recess (recess),
22B. . . Curved recess (recess),
221. . . Bottom,
222. . . Curved surface,
223. . . Fine recesses,
24. . . Pattern formation area,
25. . . Joint groove,
3. . . Lower paint layer,
30. . . First paint,
4). . . Upper paint layer,
40. . . Second paint,
C. . . Center side,
D. . . The other side,
51. . . Scraping roll,

Claims (7)

木目調を呈するための複数の木目形成凸部を形成してなる木目凹凸模様を有する原板の意匠表面に,下側塗料層及び上側塗料層を順次設けてなる建築板において,
上記上側塗料層は,上記下側塗料層を構成する塗料よりも濃色の塗料により構成されており,
上記木目形成凸部の頂点部に形成された1mm以上の幅を有する略平坦面と,上記木目形成凸部同士の間に位置する凹部に形成された15mm以上の幅を有する底面とには,上記下側塗料層が露出した露出表面が形成されていることを特徴とする建築板。
In an architectural board in which a lower paint layer and an upper paint layer are sequentially provided on the design surface of an original board having a grainy uneven pattern formed by forming a plurality of grain-forming convex portions for presenting a woodgrain tone,
The upper paint layer is made of a paint darker than the paint constituting the lower paint layer,
The substantially flat surface having a width of 1 mm or more formed at the apex portion of the wood grain forming convex part and the bottom surface having a width of 15 mm or more formed in a concave part located between the wood grain forming convex parts, An architectural board, wherein an exposed surface from which the lower paint layer is exposed is formed.
請求項1において,上記露出表面は,上記下側塗料層の表面に上記上側塗料層を構成するための塗料を塗布した後,該塗料が乾燥する前に,該塗料の一部を除去することにより形成したものであることを特徴とする建築板。2. The exposed surface according to claim 1, wherein a part of the paint is removed after the paint for constituting the upper paint layer is applied to the surface of the lower paint layer and before the paint is dried. Architectural board characterized by being formed by. 請求項1又は2において,上記木目凹凸模様は,上記木目形成凸部と,節部を呈するための節形成凸部とを有していることを特徴とする建築板。3. The building board according to claim 1 or 2, wherein the grainy uneven pattern has the grain forming convex part and a node forming convex part for exhibiting a node part. 請求項1〜3のいずれか一項において,上記建築板の意匠表面は,上記木目凹凸模様を形成した模様形成領域と,該模様形成領域よりも陥没した目地溝とを有しており,該目地溝には,上記下側塗料層の表面を上記上側塗料層が覆った被覆表面が形成されていることを特徴とする建築板。The design surface of the said building board in any one of Claims 1-3 has the pattern formation area | region which formed the said wood grain uneven | corrugated pattern, and the joint groove recessed more than this pattern formation area | region, A building board characterized in that a covering surface in which the upper paint layer covers the surface of the lower paint layer is formed in the joint groove. 請求項3又は4において,上記各木目形成凸部は,上記木目調の形成方向に直交する直交方向の断面において,それぞれ上記木目調の中心側に位置する内側壁面が,他方側に位置する外側壁面よりも緩やかな緩傾斜状に形成されていることを特徴とする建築板。5. The wood grain forming convex portion according to claim 3, wherein each of the grain forming convex portions is an outer side surface in which an inner wall surface located on the center side of the wood grain tone is located on the other side in a cross section perpendicular to the grain tone forming direction. An architectural board characterized in that it is formed in a gentle slope shape that is gentler than the wall surface. 請求項5において,上記各木目形成凸部における内側壁面には,上記露出表面が形成されていることを特徴とする建築板。6. The building board according to claim 5, wherein the exposed surface is formed on an inner wall surface of each of the grain-forming convex portions. 木目調を呈するための複数の木目形成凸部による木目凹凸模様を形成してなる意匠表面を有する原板を準備する準備工程と,
上記原板の意匠表面に第1塗料を塗布し乾燥して,下側塗料層を形成する下側塗料層形成工程と,
上記下側塗料層の表面に,上記第1塗料よりも濃色の第2塗料を塗布して,上側塗料層を形成する上側塗料層形成工程と,
上記第2塗料が乾燥する前に,上記木目形成凸部の頂点部における1mm以上の幅を有する略平坦面について上記第2塗料を掻き取ると共に,上記木目形成凸部同士の間に位置する凹部における15mm以上の幅を有する底面について上記第2塗料を掻き取って,上記木目形成凸部における略平坦面及び上記凹部における底面に上記下側塗料層が露出した露出表面を形成する掻取り工程とを行うことを特徴とする建築板の製造方法。
A preparation step of preparing an original plate having a design surface formed by forming a grainy uneven pattern by a plurality of grain-forming convex parts for presenting a grainy tone;
A lower paint layer forming step in which a first paint is applied to the design surface of the original plate and dried to form a lower paint layer;
An upper paint layer forming step of forming an upper paint layer by applying a second paint darker than the first paint on the surface of the lower paint layer;
Before the second coating material dries, the second coating material is scraped off on a substantially flat surface having a width of 1 mm or more at the apex portion of the wood grain forming convex portion, and the concave portion positioned between the wood grain forming convex portions. Scraping the second paint on the bottom surface having a width of 15 mm or more in the step, and forming an exposed surface in which the lower paint layer is exposed on the substantially flat surface of the grain-forming convex portion and the bottom surface of the concave portion; The manufacturing method of the building board characterized by performing.
JP2003152318A 2003-05-29 2003-05-29 Building board and manufacturing method thereof Expired - Lifetime JP3695452B2 (en)

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