JP4233191B2

JP4233191B2 - Wooden decorative board and method for producing the same

Info

Publication number: JP4233191B2
Application number: JP35860499A
Authority: JP
Inventors: 正康荻原; 則理森
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 1999-12-17
Filing date: 1999-12-17
Publication date: 2009-03-04
Anticipated expiration: 2019-12-17
Also published as: JP2001170911A

Description

【０００１】
【発明の属する技術分野】
本発明は、装飾性及び加工性に優れた木質化粧板及びその製造方法に関する技術分野に属するものである。
【０００２】
【従来の技術】
従来より、化粧床材等に使用される木質化粧板として、その上縁角部を斜めに面取り加工し、或いは、化粧板表面に縦方向、横方向又は両方向に断面Ｖ字状等の化粧目地溝を形成したものがよく知られている。
【０００３】
しかし、上記斜めに面取り加工したものやＶ字状の化粧目地溝を形成したものでは、ソフト感がないため、例えば特開平７―８８９９２号公報に示されるように、化粧板の上縁角部を曲面状に形成したものが提案されれている。この提案のものでは、例えば隣接する化粧板同士を実結合により接合したとき、両化粧板間に、相対する両側面が曲面形状になった目地溝が形成されるので、ソフト感や歩行感を向上させることができる。
【０００４】
【発明が解決しようとする課題】
ところで、上記のように化粧板の上縁角部等に曲面部の加工を行う場合、曲面部が粗面になってしまうという欠点があることから、その曲面部を研削によって滑らかな面にすることが必要になり、そのために研削用ブラシ等の研削手段を用いて曲面部を滑らかにすることが試みられている。
【０００５】
しかしながら、上記提案例のように木質化粧板の上縁角部に曲面部のみが設けられていると、ブラシの刃先の位置が安定せず、そのブラシが曲面部のみならず表面にまで移動して該表面を部分的に削ってしまうことがあり、表面である水平面と曲面部との境が暖昧になったり不規則になったりして、化粧外観が損なわれるという問題があった。
【０００６】
また、表面である水平面と曲面部とが連続しているため、特に深さが１ｍｍ未満の浅い目地溝を設ける場合には、水平面と曲面部との境界が目立ち難く、装飾的価値が乏しくなるという欠点もある。
【０００７】
本発明は斯かる点に鑑みてなされたもので、その目的は、上記のような化粧板の上縁角部の形状及び構造を改良することにより、上縁角部の曲面部を研削する場合に曲面部のみを研削して表面が削られることのないようにするとともに、表面である水平面と曲面部との境界を明確にして装飾的価値を高めるようにすることにある。
【０００８】
【課題を解決するための手段】
上記の目的を達成すべく、この発明では、化粧板の上縁角部に対し、曲面状側壁に加えて、その上端から略垂直に延びる直線状の立上がり側壁を形成することとした。
【０００９】
具体的には、請求項１の発明では、木質基板の表面に化粧層が設けられた木質化粧板として、その木質化粧板の上縁角部に、直線状の立上がり側壁と、この立上がり側壁の下端から下方に向かって連続する外膨らみの曲面状側壁とが形成されているものとする。
【００１０】
この構成によれば、木質化粧板の上縁角部に直線状の立上がり側壁が設けられ、この立上がり側壁の下方に曲面状側壁が形成されているため、その曲面状側壁をブラシ等の研削手段により研削する際、立上がり側壁が研削手段のガイドとなって、水平面である表面まで研削することがなくなり、よって曲面状側壁を確実に滑らか面にすることができる。
【００１１】
また、上記立上がり側壁によって、表面である水平面と曲面状側壁とが明瞭に区分され、化粧板を、寧ろ曲面状側壁が強調された装飾性の良い化粧外観にすることができる。
【００１２】
請求項２の発明では、上記請求項１の発明の構成、つまり直線状の立上がり側壁と、外膨らみの曲面状側壁とに加え、さらに、その外膨らみの曲面状側壁の下端から水平方向に延出する底面が形成されたものとする。
【００１３】
この底面によって、ブラシの刃先等の研削手段のガイドとなって、化粧板の端面である垂直面まで研削することがなくなり、化粧板同士を接合するときの垂直面同士を曲面状側壁の研削ムラによる隙間がない状態で接合することができる。
【００１４】
また、従来の化粧板のように、その上縁角部が曲面状側壁に形成されている場合、化粧板端面の加工精度のバラツキにより、化粧板同士を接合したときに曲面状側壁の下部間に不規則な隙間を生じたりすることがあり、装飾上、このような隙間は好ましくない。しかし、この請求項２の発明では、上記底面の存在により必ず底目が現れるようになり、上記のような化粧板端面の加工精度のバラツキに伴う不規則な隙間を上記底目の存在によって目立たなくさせることができる。しかも、底目と立上がり側壁との双方の存在によって曲面状側壁をより明瞭に現出させることができ、装飾外観をさらに一層向上させることができる。
【００１５】
請求項３の発明では、化粧板の上縁角部に相当する部位の基板が比重０．６以上の木質繊維板で形成されたものとする。このような比重０．６以上の繊密な木質繊維板は、合板のように縦横の方向性が少ない。従って、化粧板の上縁角部に相当する部位の基板に用いることで、合板のように特に繊維の方向に直交する方向の上縁角部に、導管や仮導管、木繊維のボーラスな断面が現出したり、繊維が綺麗に切断されずに毛羽立ったりすることによって粗面となることが少なくなり、曲面状側壁をより良好に切削加工ないしは研削加工することができる。
【００１６】
請求項４の発明では、請求項１の発明において、その木質化粧板の表面央部に、化粧板の縦又は横方向の少なくともいずれかと平行な方向に連続する化粧目地溝を設け、この化粧目地溝の両側壁は、直線状の立上がり側壁と、該立上がり側壁の下端から下方に向かって連続して形成された外膨らみの円弧状側壁とから形成されているものとする。このことで、この化粧目地溝の断面形状が、請求項１の発明の化粧板同士を接合したときに生じる目地溝と同じ形状になる。つまり、化粧目地溝が接合部の目地溝と異なった形状である場合には、化粧板同士の継ぎ目の目地溝だけが曲面形状となるので、継ぎ目であることが判ってしまい、好ましくない。
【００１７】
請求項５の発明では、請求項２の発明において、請求項４の発明と同様に、木質化粧板の表面央部に、化粧板の縦又は横方向の少なくともいずれかと平行な方向に連続する化粧目地溝を設け、この化粧目地溝の両側壁は、直線状の立上がり側壁と、該立上がり側壁の下端から下方に向かって連続して形成された外膨らみの曲面状側壁と、上記曲面状側壁の下部間に位置する水平底面とから形成されているものとする。このことで、この化粧目地溝の断面形状が、請求項２の発明の化粧板同士を接合したときに生じる目地溝と同じ形状になり、化粧板同士の継ぎ目が判り難くなる。
【００１８】
請求項６の発明は上記木質化粧板の製造方法である。この発明では、木質基板の表面に化粧層が設けられた木質化粧板の上縁角部に、切削により直線状の立上がり側壁と、該立上がり側壁の下端から下方に向かって連続する外膨らみの曲面状側壁とを形成し、上記立上がり側壁の側壁面をガイドとして上記曲面状側壁を滑らか面に研削することを特徴としている。この発明によれば、木質化粧板をプレス成型する場合に較べ、切削及び研削を用いて速く連続生産でき、木質化粧板の生産性がよい。
【００１９】
【発明の実施の形態】
（実施形態１）
図２は本発明の実施形態１に係る木質化粧板Ａを示し、この化粧板Ａは例えば化粧床材等として用いられるもので、合板等の板状基材１の表面に木質繊維板２を接着してなる木質基板３と、この木質基板３の上面（表面）に接着されて一体化された例えば突板等の表面化粧層４とを備えてなる。
【００２０】
上記木質繊維板２は、比重０．６〜０．９、厚さが１．０〜２．５ｍｍ（板状基材１の１／２〜１／５程度の厚さ）のものである。
【００２１】
上記表面化粧層４を構成する突板は、厚さ０．２〜３ｍｍのナラ、ブナ、タモ、ニレ、セン、カバ、ケヤキ等の広葉樹単板、或いはヒノキ、マツ、ツガ等の針葉樹単板であり、基板３との接着加工前に、不飽和ポリエステル系樹脂液、アクリル系樹脂液等の合成樹脂液に浸漬させ、又は上記合成樹脂液を突板に塗布して突板内に浸透含浸させ、硬化させる処理を施してもよい。
【００２２】
具体的には、上記基材１として例えば厚さ９ｍｍの合板を、また木質繊維板２として厚さ２．０ｍｍ、比重０．７８の中密度繊維板（ＭＤＦ）をそれぞれ用いるとき、突板として０．５ｍｍのナラ材からなる単板を用いるようにすればよい。また、木質化粧板Ａの裏面にクッション材を設けることもできる。
【００２３】
上記複数の木質化粧板Ａ，Ａ，…同士を並べて連結することができるように、その各々の化粧板Ａにおいて板状基材１の長さ方向に沿った左右１対の側面のうちの一側面（図で左側面）にはその側面の厚さ方向中央部を溝状に切り欠いてなる雌実部６が、また他側面（図で右側面）にはその側面の表裏面側部を切り欠いてなる雄実部７がそれぞれ形成されており、図１に示すように、化粧板Ａ側面の雌実部６に隣接化粧板Ａの雄実部７を嵌合することで、両化粧板Ａ，Ａ同士を左右方向に面一状に並べて接合するようにしている。
【００２４】
上記各化粧板Ａにおいて、その長さ方向に沿った左右両側部各々の上縁角部には左右両側部で同じ高さ位置に、直線状の立上がり側壁８と曲面状側壁９とがそれぞれ表面化粧層４ないし木質繊維板２の範囲に亘り上側から順に設けられている。上記各立上がり側壁８は、化粧板Ａの表面（上面）からそれと略直交する上下方向に延びるものである。一方、曲面状側壁９は、立上がり側壁８の下端から下方に向かって連続しかつ化粧板Ａの左右方向外側に向かって断面略円弧状に突出する円弧面からなる外膨らみのもので、その外端は木質繊維板２（化粧板Ａ）の側面に連続している。
【００２５】
そして、図１に示すように、両化粧板Ａ，Ａ同士を実結合により接合したとき、両化粧板Ａ，Ａの立上がり側壁８，８及び曲面状側壁９，９が左右に対向して目地溝１２を形成し、その目地溝１２の左右側壁は、両化粧板Ａ，Ａの立上がり側壁８，８からなる直線状の立上がり側壁と、化粧板Ａ，Ａの曲面状側壁９，９からなり、上記立上がり側壁の下端から下方に向かって連続して形成され、目地溝１２の開口側（上側）に向かうに従って溝幅が漸次拡大する外膨らみの円弧状側壁とからなる。
【００２６】
さらに、化粧板Ａの表面央部には、木質化粧板Ａの長手方向に平行に延びかつ表面化粧層４から木質繊維板２に至る深さの複数本の化粧目地溝１４，１４，…が設けられている。この各化粧目地溝１４は、上記化粧板Ａ，Ａ同士の接合部分に形成される目地溝１２と略同じ断面形状のもので（図１参照）、各化粧目地溝１４の両側壁は、直線状の立上がり側壁１４ａと、この立上がり側壁１４ａの下端から下方に向かって連続して形成され、下方に向かって化粧目地溝１４の幅方向中央側に膨らんだ外膨らみの円弧状側壁１４ｂとから形成されている。
【００２７】
上記化粧板Ａの切削加工には、組合わせカッター、鋸、ルーター等の切削具が用いられる。また、化粧板Ａの上縁角部の曲面状側壁９は、図３に示すように、研削装置のブラシＢにより、その刃先を上記立上がり側壁８の側壁面でガイドしながら滑らか面に研削する（各化粧目地溝１４の側壁についても同様に、ブラシＢの刃先を立上がり側壁１４ａの側壁面でガイドしながら円弧状側壁１４ｂを研削する）。
【００２８】
尚、上記各化粧目地溝１４は、化粧板Ａの幅方向に形成することもできる。つまり、化粧板Ａの縦方向又は横方向の少なくとも一方と平行な方向に連続するように形成すればよい。
【００２９】
また、上記表面化粧層４の表面及び化粧目地溝１４の内面には例えばウレタン系合成樹脂透明塗料による塗装が連続して施されて塗膜が形成されている。
【００３０】
したがって、この実施形態において、複数の木質化粧板Ａ，Ａ，…を例えば化粧床材として図外の床下地材上に並べて施工する場合、隣り合う化粧板Ａ，Ａの一方の側面の雌実部６に対し他方の化粧板Ａの雄実部７を嵌合することで、両化粧板Ａ，Ａ同士が左右方向に面一状に並んで接合され、両化粧板Ａ，Ａ間には目地溝１２が形成される。そのとき、各化粧板Ａの上縁角部に、外側に向かって突出する円弧面からなる曲面状側壁９が設けられているので、上記両化粧板Ａ，Ａ間に形成される目地溝１２は、上記曲面状側壁９，９により両側面が曲面形状になった目地溝１２となり、ソフト感や歩行感を向上させることができる。
【００３１】
また、各化粧板Ａの表面央部にも上記化粧板Ａ，Ａ間の接合部の目地溝１２と略同じ断面形状の化粧目地溝１４，１４，…が形成されているので、ソフト感や歩行感をさらに向上させることができる。
【００３２】
さらに、化粧板Ａの上縁角部における上記曲面状側壁９の上側に直線状の立上がり側壁８が形成されているため、図３に示す如く、上記曲面状側壁９を研削装置のブラシＢの刃先により研削する際、立上がり側壁８の側面がブラシＢのガイドとなり、そのブラシＢの刃先が立上がり側壁８により案内されながら研削されるようになり、そのブラシＢの刃先が立上がり側壁８を越えて水平面である表面まで移動して該表面を研削することはなくなる。その結果、上記曲面状側壁９を効率よく確実に滑らか面に研削することができる。
【００３３】
しかも、上記化粧板Ａの上縁角部に当たる基板３の部位が比重０．６以上の木質繊維板２からなるので、この木質繊維板２は合板に比べて縦横の方向性が少なく、合板のように特に繊維の方向に直交する方向の上縁角部に、導管や仮導管、木繊維のボーラスな断面が現出したり、その上縁角部の繊維が綺麗に切断されずに毛羽立ったりするのを抑えて、曲面状側壁９が粗面となることを防ぐことができ、曲面状側壁９をより良好に切削加工又は研削加工することができる。
【００３４】
また、上記表面である水平面と曲面状側壁９との間に立上がり側壁８が介在しているので、それら水平面と曲面状側壁９とが立上がり側壁８によって明瞭に区分されるようになり、化粧板Ａの外観を曲面状側壁９が強調された装飾性の良い化粧外観にすることができる。
【００３５】
さらに、上記各化粧板Ａの表面央部の各化粧目地溝１４は化粧板Ａ，Ａ間の接合部の目地溝１２と略同じ断面形状であるので、化粧板Ａ，Ａ同士の継ぎ目の目地溝１２と各化粧板Ａの表面央部の化粧目地溝１４，１４，…との区別が付き難くなり、化粧板Ａを施工したときの外観見映えを高めることができる。
【００３６】
（実施形態２）
図４及び図５は実施形態２を示し（尚、以下の各実施形態では図１〜図３と同じ部分については同じ符号を付してその詳細な説明は省略する）、化粧板Ａ，Ａ間に形成される目地溝１２及び各化粧目地溝１４の形状を変えたものである。
【００３７】
すなわち、この実施形態では、木質化粧板Ａの上縁角部に、立上がり側壁８及び曲面状側壁９に加え、この曲面状側壁９の下端から略水平に延びる底面１０が設けられている。
【００３８】
また、化粧板Ａの表面央部の各化粧目地溝１４は、その両側壁が、直線状の立上がり側壁１４ａ，１４ａと、この立上がり側壁１４ａ，１４ａの下端から下方に向かって連続して形成された外膨らみの円弧状側壁１４ｂ，１４ｂと、この円弧状側壁１４ｂ，１４ｂの下部間に位置する水平底面１４ｃとから形成されている。その他の構成は実施形態１と同様である。
【００３９】
したがって、この実施形態においても上記実施形態１と同様の作用効果を奏することができる。また、加えて、化粧板Ａの上縁角部に、外膨らみの曲面状側壁９の下端から水平方向に延出する底面１０が形成されているので、上記と同様にしてブラシＢにより曲面状側壁９を研削するときに（図３参照）、底面１０によってブラシＢの刃先をガイドでき、化粧板Ａの端面である垂直面まで研削することがなくなり、化粧板Ａ，Ａ同士を接合するときの垂直面同士を曲面状側壁９，９の研削ムラによる隙間がない状態で接合することができる。
【００４０】
また、化粧板Ａ，Ａ同士の接合状態では、上記底面１０の存在により目地溝１２に必ず底目が現れるようになり、化粧板Ａの端面の加工精度のバラツキに伴う不規則な隙間を底目の存在によって目立たなくさせることができる。つまり、底面１０による底目と立上がり側壁８との双方の存在によって曲面状側壁９をより明瞭に現出させることができ、装飾外観をさらに向上させることができる。
【００４１】
さらに、各化粧板Ａの上縁角部に、上記曲面状側壁９の下端から略水平に延びる底面１０が設けられているので、上記両化粧板Ａ，Ａ間の目地溝１２は上記底面１０を地底目とする目地溝に形成される。このため、この目地底が目立ち易くなり、このような施工後に、図４に仮想線にて示すように、化粧板Ａの寸法変化によって両化粧板Ａ，Ａ間に目隙１６が生じたとしても、上記目地底が目立ち易くなった分だけ、目隙１６が目立ち難くなって目地部の外観見映えを高めることができる。
【００４２】
また、上記のように両化粧板Ａ，Ａ間に目隙１６が生じた状態で、両化粧板Ａ，Ａ間の目地溝１２にごみや埃等が落ちたときでも、そのごみ等の大部分が上記目地底（目地溝１２の底面１０，１０上）に留まり、その目地底に溜まったごみ等がそれ以上、目隙１６内に押し込まれ難くなり、目地溝１２からごみ等を容易に取り除いて掃除の容易化を図ることができる。
【００４３】
（実施形態３）
図６及び図７は実施形態３を示し、上記実施形態２では、化粧板Ａの左右上縁角部の双方に底面１０，１０を設けているのに対し、化粧板Ａの左右上縁角部のうちの一方、例えば雄実部７を有する端部側のみに底面１０を設けたものである。この場合、化粧板Ａの接合部の目地溝１２の目地底は上記一方の側の底面１０のみにより形成される。その他は実施形態２と同様の構成であり、よって、この実施形態でも実施形態２と略同様の作用効果が得られる。
【００４４】
尚、上記各実施形態では、木質化粧板Ａの基板３を、合板等の板状基材１の表面に木質繊維板２を接着してなるものとしているが、その他、基板３を合板等のみから形成してもよい。また、本発明は、化粧床材以外の用途として用いられる木質化粧板に対しても適用できるのは勿論のことである。
【００４５】
【発明の効果】
以上説明したように、請求項１の発明では、木質基板の表面に化粧層が設けられた木質化粧板の上縁角部に直線状の立上がり側壁と、この立上がり側壁の下端から下方に向かって連続する外膨らみの曲面状側壁とを設けた。また、請求項２の発明では、さらに、上記曲面状側壁の下端から水平方向に延出する底面を形成した。これらの発明によると、化粧板の上縁角部の曲面状側壁をブラシの刃先等の研削手段により研削する際、立上がり側壁が研削手段のガイドとなって、水平面である表面まで研削されるのを防止でき、曲面状側壁を確実に滑らか面にすることができるとともに、表面である水平面と曲面状側壁とを立上がり側壁により明瞭に区分して化粧板の装飾性の向上を図ることができる。
【００４６】
特に、請求項２の発明によると、上記曲面状側壁の下端から水平方向に延出する底面によっても研削手段がガイドされて、化粧板の端面である垂直面まで研削することがなくなり、化粧板同士を接合するときの垂直面同士を曲面状側壁の研削ムラによる隙間がない状態で接合することができるとともに、上記底面の存在により必ず底目が現れるようにして、化粧板端面の加工精度のバラツキに伴う曲面状側壁の下部間の不規則な隙間を底目の存在によって目立たなくし、底目と立上がり側壁との双方の存在によって曲面状側壁をより明瞭に現出させて、装飾外観をさらに一層向上させることができる。
【００４７】
請求項３の発明によると、化粧板の上縁角部に相当する部位の基板を比重０．６以上の木質繊維板で形成するようにしたことにより、曲面状側壁をより良好に切削加工及び研削加工することができる。
【００４８】
請求項４の発明では、請求項１の発明の木質化粧板の表面央部に、化粧板の縦又は横方向の少なくともいずれかと平行な方向に連続する化粧目地溝を設け、この化粧目地溝の両側壁を、直線状の立上がり側壁と、その立上がり側壁の下端から下方に向かって連続して形成された外膨らみの円弧状側壁とから形成した。また、請求項５の発明では、請求項２の発明の木質化粧板の表面央部に、化粧板の縦又は横方向の少なくともいずれかと平行な方向に連続する化粧目地溝を設け、この化粧目地溝の両側壁を、直線状の立上がり側壁と、この立上がり側壁の下端から下方に向かって連続して形成された外膨らみの曲面状側壁と、この曲面状側壁の下部間に位置する水平底面とから形成した。これらの発明によれば、木質化粧板の表面央部の化粧目地溝の断面形状が、化粧板同士を接合したときに生じる目地溝と同じ形状になり、化粧板同士の継ぎ目を判り難くすることができる。
【００４９】
請求項６の発明は上記木質化粧板の製造方法として、化粧板の上縁角部における立上がり側壁の側壁面をガイドとして曲面状側壁を滑らか面に研削することにより、木質化粧板をプレス成型する場合に較べ、切削及び研削により連続生産でき、木質化粧板の生産性の向上を図ることができる。
【図面の簡単な説明】
【図１】本発明の実施形態１に係る化粧板同士の接合部に形成される目地溝を示す拡大断面図である。
【図２】実施形態１に係る化粧板の一部を示す斜視図である。
【図３】化粧板の曲面状側壁を研削する状態を示す図である。
【図４】実施形態２を示す図１相当図である。
【図５】実施形態２を示す図２相当図である。
【図６】実施形態３を示す図１相当図である。
【図７】実施形態３を示す図２相当図である。
【符号の説明】
Ａ木質化粧板
３木質基板
４表面化粧層
８立上がり側壁
９曲面状側壁
１０底面
１２目地溝
１４化粧目地溝
１４ａ立上がり側壁
１４ｂ円弧状側壁
１４ｃ水平底面
Ｂブラシ[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a technical field related to a wooden decorative board excellent in decorativeness and workability and a method for producing the same.
[0002]
[Prior art]
Conventionally, as a wooden decorative board used for a decorative flooring or the like, the upper edge corner is chamfered obliquely, or the decorative face has a V-shaped cross section in the vertical direction, the horizontal direction, or both directions on the decorative board surface. What formed the graben is well known.
[0003]
However, since the above-mentioned slant chamfered one or V-shaped decorative joint groove does not have a soft feeling, for example, as shown in JP-A-7-88992, the upper edge corner of the decorative plate Has been proposed that is formed into a curved surface. In this proposal, for example, when adjacent decorative plates are joined together by actual bonding, joint grooves with curved surfaces on both sides are formed between both decorative plates. Can be improved.
[0004]
[Problems to be solved by the invention]
By the way, when the curved surface portion is processed on the upper edge corner or the like of the decorative plate as described above, there is a disadvantage that the curved surface portion becomes rough, so that the curved surface portion is made smooth by grinding. Therefore, it has been attempted to smooth the curved surface portion by using a grinding means such as a grinding brush.
[0005]
However, if only the curved surface portion is provided at the upper edge corner of the wooden decorative board as in the above proposed example, the position of the brush blade edge is not stable, and the brush moves not only to the curved surface portion but also to the surface. In some cases, the surface may be partially scraped, and the boundary between the horizontal surface and the curved surface, which is the surface, becomes warm or irregular, and the cosmetic appearance is impaired.
[0006]
In addition, since the horizontal surface and the curved surface portion are continuous, particularly when a shallow joint groove having a depth of less than 1 mm is provided, the boundary between the horizontal surface and the curved surface portion is inconspicuous and the decorative value becomes poor. There is also a drawback.
[0007]
The present invention has been made in view of such points, and its purpose is to grind the curved surface portion of the upper edge corner by improving the shape and structure of the upper edge corner of the decorative plate as described above. In addition to grinding only the curved surface portion so that the surface is not scraped, the boundary between the horizontal surface and the curved surface portion, which is the surface, is clarified to enhance the decorative value.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, in addition to the curved side wall, a straight rising side wall extending substantially perpendicularly from the upper end of the upper edge corner of the decorative plate is formed.
[0009]
Specifically, in the invention of claim 1, as a wooden decorative board provided with a decorative layer on the surface of the wooden substrate, a linear rising side wall is formed at the upper edge corner of the wooden decorative board, and the rising side wall It is assumed that an outwardly bulged curved side wall is formed downward from the lower end.
[0010]
According to this configuration, since the straight rising side wall is provided at the upper edge corner portion of the wooden decorative board, and the curved side wall is formed below the rising side wall, the curved side wall is ground with a grinding means such as a brush. When grinding, the rising side wall serves as a guide for the grinding means, so that the surface that is a horizontal surface is not ground, and the curved side wall can be surely made smooth.
[0011]
Further, the rising side wall clearly separates the horizontal surface and the curved side wall, which is the surface, so that the decorative board can have a decorative appearance with a good decorativeness with the curved side wall emphasized.
[0012]
In the invention of claim 2, in addition to the configuration of the invention of claim 1, that is, the straight rising side wall and the curved side wall of the outer bulge, it further extends in the horizontal direction from the lower end of the curved side wall of the outer bulge. It is assumed that a bottom surface is formed.
[0013]
This bottom surface serves as a guide for the grinding means such as the blade edge of the brush and does not grind to the vertical surface which is the end surface of the decorative plates. When the decorative plates are joined together, the vertical surfaces are unevenly ground on the curved side walls. It can join in the state without a gap by.
[0014]
In addition, when the upper edge corner is formed on a curved side wall as in the case of a conventional decorative plate, when the decorative plates are joined to each other due to variations in processing accuracy of the decorative plate end surfaces, Irregular gaps may occur, and such a gap is not preferable for decoration. However, in the invention of claim 2, the bottom always appears due to the presence of the bottom surface, and the irregular gap due to the variation in the processing accuracy of the decorative plate end surface is conspicuous due to the presence of the bottom surface. Can be eliminated. In addition, the curved side wall can be more clearly revealed by the presence of both the bottom and the rising side wall, and the decorative appearance can be further improved.
[0015]
In the invention of claim 3, the substrate corresponding to the upper edge corner of the decorative board is formed of a wood fiber board having a specific gravity of 0.6 or more. Such a fine wood fiber board having a specific gravity of 0.6 or more has little vertical and horizontal directionality like plywood. Therefore, by using it on the substrate corresponding to the upper edge corner of the decorative board, a bolus cross section of a conduit, temporary conduit, or wood fiber at the upper edge corner in a direction perpendicular to the direction of the fiber, such as plywood. Appear, or the fibers are not cut cleanly and become fuzzy, so that the surface becomes less rough, and the curved side wall can be cut or ground better.
[0016]
According to a fourth aspect of the present invention, in the first aspect of the present invention, a decorative joint groove is provided in the center of the surface of the wooden decorative board in a direction parallel to at least one of the vertical and horizontal directions of the decorative board. Both side walls of the graben are formed from straight rising side walls and arcuate side walls having an outward bulge formed continuously downward from the lower ends of the rising side walls. Thus, the cross-sectional shape of the decorative joint groove becomes the same shape as the joint groove formed when the decorative plates of the invention of claim 1 are joined together. That is, when the decorative joint groove has a shape different from the joint groove of the joint portion, only the joint groove of the joint plate between the decorative plates has a curved surface shape.
[0017]
In the invention of claim 5, in the invention of claim 2, as in the invention of claim 4, the makeup that is continuous in a direction parallel to at least one of the longitudinal and lateral directions of the decorative board at the center of the surface of the wooden decorative board. A joint groove is provided, and both side walls of the decorative joint groove include a straight rising side wall, a curved side wall having an outward bulge formed continuously downward from the lower end of the rising side wall, and the curved side wall. It shall be formed from the horizontal bottom face located between lower parts. Thus, the cross-sectional shape of the decorative joint groove becomes the same shape as the joint groove formed when the decorative plates of the invention of claim 2 are joined together, and the joint between the decorative plates becomes difficult to understand.
[0018]
A sixth aspect of the present invention is a method for producing the wood decorative board. In this invention, the upper edge corner of the wooden decorative board provided with a decorative layer on the surface of the wooden substrate, the straight rising side wall by cutting and the curved surface of the outward bulge that continues downward from the lower end of the rising side wall The curved side wall is ground into a smooth surface using the side wall surface of the rising side wall as a guide. According to this invention, compared with the case where a wooden decorative board is press-molded, continuous production can be performed quickly using cutting and grinding, and the productivity of the wooden decorative board is good.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
FIG. 2 shows a wooden decorative board A according to Embodiment 1 of the present invention. This decorative board A is used as, for example, a decorative flooring material, and a wooden fiber board 2 is provided on the surface of a plate-like substrate 1 such as plywood. The wood substrate 3 is bonded, and the surface decorative layer 4 such as a veneer is bonded to and integrated with the upper surface (surface) of the wood substrate 3.
[0020]
The wood fiber board 2 has a specific gravity of 0.6 to 0.9 and a thickness of 1.0 to 2.5 mm (a thickness of about 1/2 to 1/5 of the plate-like substrate 1).
[0021]
The veneer constituting the surface decorative layer 4 is a hardwood veneer such as oak, beech, tamo, elm, sen, hippopotamus, zelkova, etc., or a softwood veneer such as hinoki, pine, or tsuga having a thickness of 0.2-3 mm. Yes, before being bonded to the substrate 3, it is immersed in a synthetic resin liquid such as an unsaturated polyester resin liquid or an acrylic resin liquid, or the synthetic resin liquid is applied to the veneer and impregnated and impregnated into the veneer. You may perform the process to make.
[0022]
Specifically, for example, a 9 mm thick plywood is used as the base material 1 and a 2.0 mm thick medium density fiber board (MDF) is used as the wood fiber board 2. A single plate made of 5 mm oak material may be used. Moreover, a cushion material can also be provided on the back surface of the wooden decorative board A.
[0023]
One of the pair of left and right side surfaces along the length direction of the plate-like substrate 1 in each of the decorative boards A so that the plurality of wooden decorative boards A, A,. The side surface (left side in the figure) has a female real part 6 formed by cutting out the central portion in the thickness direction of the side surface into a groove shape, and the other side (right side in the figure) has the front and back sides of the side surface. The male part 7 which is notched is formed, respectively, and as shown in FIG. 1, by fitting the male part 7 of the adjacent decorative board A to the female part 6 on the side of the decorative board A, both makeups The plates A, A are arranged side by side in the left-right direction and joined together.
[0024]
In each of the decorative plates A, the straight rising side wall 8 and the curved side wall 9 are respectively provided on the upper edge corners of the left and right side parts along the length direction at the same height position on the left and right side parts. It is provided in order from the upper side over the range of the decorative layer 4 or the wood fiber board 2. Each of the rising side walls 8 extends from the surface (upper surface) of the decorative board A in the vertical direction substantially orthogonal thereto. On the other hand, the curved side wall 9 is an outward bulge consisting of an arc surface that is continuous downward from the lower end of the rising side wall 8 and protrudes in a substantially arc shape in cross section toward the outer side in the left-right direction of the decorative board A. The end is continuous with the side surface of the wood fiber board 2 (decorative board A).
[0025]
As shown in FIG. 1, when the decorative plates A and A are joined together by actual connection, the rising side walls 8 and 8 and the curved side walls 9 and 9 of the decorative plates A and A face the left and right sides. The ground groove 12 is formed, and the right and left side walls of the joint groove 12 are composed of a straight rising side wall composed of the rising side walls 8 and 8 of both decorative plates A and A and a curved side wall 9 and 9 of the decorative plates A and A. The outer side wall is formed of an arcuate side wall having an outward bulge that is continuously formed downward from the lower end of the rising side wall and gradually increases in width toward the opening side (upper side) of the joint groove 12.
[0026]
Further, at the center of the surface of the decorative board A, there are a plurality of decorative joint grooves 14, 14,... Extending parallel to the longitudinal direction of the wooden decorative board A and extending from the surface decorative layer 4 to the wooden fiber board 2. Is provided. Each of the decorative joint grooves 14 has substantially the same cross-sectional shape as the joint groove 12 formed at the joint portion between the decorative plates A and A (see FIG. 1), and both side walls of each of the decorative joint grooves 14 are straight lines. Formed from a lower end of the rising side wall 14a and an arcuate side wall 14b having an outward bulge that is continuously formed downward from the lower end of the rising side wall 14a and bulges downward toward the center in the width direction of the decorative joint groove 14. Has been.
[0027]
A cutting tool such as a combination cutter, saw, or router is used for cutting the decorative plate A. Further, as shown in FIG. 3, the curved side wall 9 at the upper edge corner of the decorative plate A is ground to a smooth surface while the cutting edge is guided by the side wall surface of the rising side wall 8 by the brush B of the grinding device. (Similarly, the arc-shaped side wall 14b is ground while guiding the cutting edge of the brush B with the side wall surface of the side wall 14a).
[0028]
The decorative joint grooves 14 can also be formed in the width direction of the decorative board A. That is, what is necessary is just to form so that it may continue in the direction parallel to at least one of the vertical direction of the decorative board A, or a horizontal direction.
[0029]
The surface of the surface decorative layer 4 and the inner surface of the decorative joint groove 14 are continuously coated with, for example, a urethane synthetic resin transparent paint to form a coating film.
[0030]
Therefore, in this embodiment, when arranging a plurality of wooden decorative boards A, A,... On a floor base material not shown as a decorative floor material, for example, the female fruit on one side of the adjacent decorative boards A, A By fitting the male part 7 of the other decorative plate A to the portion 6, both decorative plates A, A are joined in a line in the horizontal direction, and between the decorative plates A, A A joint groove 12 is formed. At that time, since the curved side wall 9 made of an arc surface projecting outward is provided at the upper edge corner of each decorative plate A, the joint groove 12 formed between the decorative plates A and A is provided. Is a joint groove 12 having curved surfaces on both side surfaces by the curved side walls 9 and 9, and can improve soft feeling and walking feeling.
[0031]
Moreover, since the joint groove | channel 14, 14, ... of the substantially same cross-sectional shape as the joint groove 12 of the junction part between the said decorative plates A and A is formed also in the center part of the surface of each decorative board A, soft feeling or The feeling of walking can be further improved.
[0032]
Further, since the straight rising side wall 8 is formed above the curved side wall 9 at the upper edge corner of the decorative plate A, the curved side wall 9 is formed on the brush B of the grinding apparatus as shown in FIG. When grinding with the cutting edge, the side surface of the rising side wall 8 serves as a guide for the brush B, and the cutting edge of the brush B is ground while being guided by the rising side wall 8, and the cutting edge of the brush B passes over the rising side wall 8. It does not move to a horizontal surface and grind the surface. As a result, the curved side wall 9 can be efficiently and reliably ground to a smooth surface.
[0033]
In addition, since the portion of the substrate 3 corresponding to the upper edge corner of the decorative board A is made of the wood fiber board 2 having a specific gravity of 0.6 or more, the wood fiber board 2 has less vertical and horizontal directions than the plywood, In particular, a bolus section of a conduit, temporary conduit, or wood fiber appears at the corner of the upper edge perpendicular to the direction of the fiber, or the fiber at the corner of the upper edge is fluffed without being cut cleanly. Therefore, the curved side wall 9 can be prevented from becoming a rough surface, and the curved side wall 9 can be cut or ground more favorably.
[0034]
Further, since the rising side wall 8 is interposed between the horizontal surface which is the surface and the curved side wall 9, the horizontal surface and the curved side wall 9 are clearly separated by the rising side wall 8. The appearance of A can be made into a decorative appearance with good decorativeness with the curved side wall 9 emphasized.
[0035]
Furthermore, since each joint groove 14 at the center of the surface of each decorative plate A has substantially the same cross-sectional shape as the joint groove 12 at the joint between the decorative plates A and A, the joint between the decorative plates A and A is provided. It becomes difficult to distinguish between the groove 12 and the makeup joint grooves 14, 14,... At the center of the surface of each decorative plate A, and the appearance of the decorative plate A can be improved.
[0036]
(Embodiment 2)
4 and 5 show the second embodiment (in the following embodiments, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals and detailed description thereof is omitted), and decorative plates A and A are shown. The shape of the joint groove 12 and each joint groove 14 formed between them is changed.
[0037]
That is, in this embodiment, in addition to the rising side wall 8 and the curved side wall 9, a bottom surface 10 extending substantially horizontally from the lower end of the curved side wall 9 is provided at the upper edge corner of the wooden decorative board A.
[0038]
In addition, each decorative joint groove 14 at the center of the surface of the decorative plate A is formed such that both side walls thereof are continuous from the straight rising side walls 14a, 14a and the lower ends of the rising side walls 14a, 14a downward. It is formed from arcuate side walls 14b, 14b of outer bulges and a horizontal bottom surface 14c located between the lower portions of the arcuate side walls 14b, 14b. Other configurations are the same as those of the first embodiment.
[0039]
Therefore, also in this embodiment, the same operational effects as those of the first embodiment can be obtained. In addition, since a bottom surface 10 extending in the horizontal direction from the lower end of the outwardly bulging curved side wall 9 is formed at the upper edge corner of the decorative board A, the curved surface is formed by the brush B in the same manner as described above. When the side wall 9 is ground (see FIG. 3), the cutting edge of the brush B can be guided by the bottom surface 10 and no longer grinds to the vertical surface that is the end surface of the decorative plate A, and the decorative plates A and A are joined together. Can be joined in a state where there is no gap due to uneven grinding of the curved side walls 9, 9.
[0040]
Further, in the joined state between the decorative plates A and A, the bottoms 10 always appear in the joint grooves 12 due to the presence of the bottom surface 10, and irregular gaps due to variations in the processing accuracy of the end surfaces of the decorative plates A are left. It can be made inconspicuous by the presence of eyes. That is, the curved side wall 9 can appear more clearly due to the presence of both the bottom and the rising side wall 8 by the bottom surface 10, and the decorative appearance can be further improved.
[0041]
Further, since a bottom surface 10 extending substantially horizontally from the lower end of the curved side wall 9 is provided at the upper edge corner of each decorative plate A, the joint groove 12 between the decorative plates A and A is provided on the bottom surface 10. It is formed in the joint groove with the bottom. For this reason, this joint floor becomes conspicuous, and after such construction, as shown by a virtual line in FIG. 4, it is assumed that a gap 16 is generated between the decorative plates A and A due to the dimensional change of the decorative plate A. However, as the joint bottom becomes more conspicuous, the gap 16 becomes less conspicuous and the appearance of the joint can be improved.
[0042]
Further, even when dust or dust falls in the joint groove 12 between the decorative plates A and A in a state where the gap 16 is generated between the decorative plates A and A as described above, the size of the dust or the like is large. The portion stays on the joint bottom (on the bottom surface 10, 10 of the joint groove 12), and any dust collected on the joint bottom becomes harder to be pushed into the joint gap 16, and dust etc. can be easily removed from the joint groove 12. It can be removed to facilitate cleaning.
[0043]
(Embodiment 3)
6 and 7 show the third embodiment. In the second embodiment, the bottom surfaces 10 and 10 are provided on both the left and right upper edge corners of the decorative board A, whereas the left and right upper edge angles of the decorative board A are shown. For example, the bottom surface 10 is provided only on one end side having the male part 7, for example. In this case, the joint bottom of the joint groove 12 at the joint portion of the decorative plate A is formed only by the bottom surface 10 on the one side. The rest of the configuration is the same as that of the second embodiment, and therefore, this embodiment can provide substantially the same effects as those of the second embodiment.
[0044]
In each of the above embodiments, the substrate 3 of the wooden decorative board A is formed by adhering the wooden fiberboard 2 to the surface of the plate-like base material 1 such as plywood. You may form from. Of course, the present invention can also be applied to a wooden decorative board used for purposes other than a decorative flooring.
[0045]
【The invention's effect】
As described above, according to the first aspect of the present invention, the straight rising side wall is formed at the upper edge corner of the wooden decorative board having the decorative layer provided on the surface of the wooden substrate, and the lower end of the rising side wall is directed downward. A continuous outer bulging curved side wall was provided. In the invention of claim 2, a bottom surface extending in the horizontal direction from the lower end of the curved side wall is further formed. According to these inventions, when the curved side wall of the upper edge corner of the decorative plate is ground by the grinding means such as the blade edge of the brush, the rising side wall serves as a guide for the grinding means and is ground to the surface which is a horizontal plane. The curved side wall can be surely made smooth, and the decorative surface of the decorative board can be improved by clearly separating the horizontal surface and the curved side wall from the rising side wall.
[0046]
In particular, according to the second aspect of the present invention, the grinding means is guided by the bottom surface extending in the horizontal direction from the lower end of the curved side wall, so that it does not grind to the vertical surface which is the end surface of the decorative plate. The vertical surfaces when joining each other can be joined in a state where there is no gap due to uneven grinding of the curved side walls, and the bottom surface is sure to appear due to the existence of the bottom surface, so that the processing accuracy of the decorative plate end face is improved. The irregular gap between the lower parts of the curved side wall due to the variation is made inconspicuous by the presence of the bottom, and the curved side wall is more clearly revealed by the presence of both the bottom and the rising side wall, further enhancing the decorative appearance. This can be further improved.
[0047]
According to the invention of claim 3, by forming the substrate of the portion corresponding to the upper edge corner portion of the decorative board with a wood fiber board having a specific gravity of 0.6 or more, the curved side wall can be cut and processed better. It can be ground.
[0048]
In the invention of claim 4, a decorative joint groove that is continuous in a direction parallel to at least one of the vertical and horizontal directions of the decorative board is provided at the center of the surface of the wooden decorative board of the invention of claim 1, and the decorative joint groove Both side walls were formed from a straight rising side wall and an arcuate side wall of an outward bulge formed continuously downward from the lower end of the rising side wall. Further, in the invention of claim 5, a decorative joint groove that is continuous in a direction parallel to at least one of the longitudinal and horizontal directions of the decorative board is provided at the center of the surface of the wooden decorative board of the invention of claim 2, and this decorative eye is provided. Both side walls of the graben include a straight rising side wall, a curved side wall having an outward bulge formed continuously downward from the lower end of the rising side wall, and a horizontal bottom surface located between the lower portions of the curved side wall, Formed from. According to these inventions, the cross-sectional shape of the decorative joint groove at the center of the surface of the wooden decorative board is the same shape as the joint groove formed when the decorative boards are joined together, making it difficult to understand the joint between the decorative boards. Can do.
[0049]
According to a sixth aspect of the present invention, as a method for manufacturing the above-mentioned wood decorative board, the wooden decorative board is press-molded by grinding the curved side wall into a smooth surface using the side wall surface of the rising side wall at the upper edge corner of the decorative board as a guide. Compared to the case, it can be continuously produced by cutting and grinding, and the productivity of the wood decorative board can be improved.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view showing a joint groove formed at a joint portion between decorative plates according to Embodiment 1 of the present invention.
2 is a perspective view showing a part of a decorative board according to Embodiment 1. FIG.
FIG. 3 is a view showing a state in which a curved side wall of a decorative board is ground.
FIG. 4 is a view corresponding to FIG.
FIG. 5 is a view corresponding to FIG.
FIG. 6 is a view corresponding to FIG.
FIG. 7 is a view corresponding to FIG.
[Explanation of symbols]
A wood decorative board 3 wood substrate 4 surface decorative layer 8 rising side wall 9 curved side wall 10 bottom surface 12 joint groove 14 makeup joint groove 14a rising side wall 14b arc-shaped side wall 14c horizontal bottom surface B brush

Claims

A wooden decorative board provided with a decorative layer on the surface of a wooden substrate,
In the upper edge corner, a straight rising side wall,
A wooden decorative board, characterized in that an outwardly bulging curved side wall is formed downward from the lower end of the rising side wall.

A wooden decorative board provided with a decorative layer on the surface of a wooden substrate,
In the upper edge corner, a straight rising side wall,
A curved side wall of an outward bulge that continues downward from the lower end of the rising side wall;
A wooden decorative board, wherein a bottom surface extending in a horizontal direction from a lower end of the curved side wall is formed.

In the wooden decorative board according to claim 1 or 2,
A wood decorative board, wherein a portion of the substrate corresponding to the upper edge corner is formed of a wood fiber board having a specific gravity of 0.6 or more.

The wooden decorative board according to claim 1,
A decorative joint groove that is continuous in a direction parallel to at least one of the vertical and horizontal directions of the decorative board is provided in the center of the surface,
The both side walls of the decorative joint groove are formed of a straight rising side wall and an arcuate side wall of an outward bulge formed continuously downward from the lower end of the rising side wall. Decorative board.

The woody decorative board according to claim 2,
A decorative joint groove that is continuous in a direction parallel to at least one of the vertical and horizontal directions of the decorative board is provided in the center of the surface,
Both side walls of the decorative joint groove are located between a straight rising side wall, a curved side wall having an outward bulge formed continuously downward from a lower end of the rising side wall, and a lower portion of the curved side wall. A wooden decorative board characterized by being formed from a horizontal bottom surface.

At the upper edge corner of the wooden decorative board provided with a decorative layer on the surface of the wooden substrate, a straight rising side wall by cutting and a curved side wall having an outward bulge continuous downward from the lower end of the rising side wall. Forming,
A method for producing a wooden decorative board, wherein the curved side wall is ground to a smooth surface using the side wall surface of the rising side wall as a guide.