JP3715977B2

JP3715977B2 - Large wood laminate and manufacturing method thereof

Info

Publication number: JP3715977B2
Application number: JP2003134205A
Authority: JP
Inventors: 典明神谷
Original assignee: 中村新興木材株式会社
Priority date: 2003-05-13
Filing date: 2003-05-13
Publication date: 2005-11-16
Anticipated expiration: 2023-05-13
Also published as: JP2004338106A

Description

【０００１】
【技術分野】
本発明は，複数の単板積層材をその端部において接合してなる大型木質積層板，及びその製造方法に関する。
【０００２】
【従来技術】
従来より，複数の単板積層材をその端部において接合することにより，大型木質積層板を製造する方法がある。
該大型木質積層板の製造方法においては，図１４に示すごとく，隣り合う単板積層材の端部同士を，いわゆるスカーフジョイントによって接合する。即ち，上記単板積層材９２の端部を，その表側面９２４及び裏側面９２５に対して斜めとなる一つの平面において切断し，この切断面であるスカーフ斜面９２３同士を接着剤９３にて接着して，接合する。
【０００３】
【特許文献１】
特開２００２−１８７１０５号公報
【０００４】
【解決しようとする課題】
しかしながら，上記従来の大型木質積層板９においては以下の問題がある。
即ち，スカーフジョイントを用いて，複数の単板積層材９２を接合する場合，その強度を充分に確保することができないおそれがある。例えば，上記大型木質積層板９２を，トラックの荷台のフロアー板（図１２の符号５１参照）等，荷重のかかるものに使用する場合，その荷重に充分に耐えられる強度を確保することが困難となる場合がある。
【０００５】
また，スカーフジョイント部における接合強度を確保するためには，その接合面積を大きくする必要がある。即ち，スカーフ斜面９２３を大きくする必要があり，該スカーフ斜面９２３の形成領域Ｂを大きく確保する必要がある。それ故，同じ大きさの大型木質積層板９を得ようとしたとき，必要となる原板が多く必要となり，原料コストが高くなるという問題もある。
【０００６】
本発明は，かかる従来の問題点に鑑みてなされたもので，強度に優れた安価な大型木質積層板及びその製造方法を提供しようとするものである。
【０００７】
【課題の解決手段】
第１の発明は，複数の単板積層材をその端部において接合することにより大型木質積層板を製造する方法であって，
上記大型木質積層板は，トラックの荷台のフロアー板，煽り板，又は縦根太であり，
上記各単板積層材の端部に，断面Ｖ字状に突出したＶ雄実，又は断面Ｖ字状に後退したＶ雌実を形成する実加工工程と，
上記Ｖ雄実と上記Ｖ雌実の一方又は双方に熱硬化型の接着剤であるレゾルシノールを塗布する接着剤塗布工程と，
上記単板積層材の上記Ｖ雄実と他の単板積層材の上記Ｖ雌実とを嵌合させる嵌合工程と，
上記Ｖ雄実とＶ雌実との嵌合部分を，該Ｖ雌実の外方から加熱しながら圧締する熱圧締工程とを行うことにより，上記複数の単板積層材を接合して大型木質積層板を製造し，
また，上記Ｖ雄実及びＶ雌実の傾斜面は，上記単板積層材の表側面又は裏側面に対して５〜１５°の角度をもって傾斜しており，
上記熱圧締工程を行う前においては，上記雄実の傾斜面が上記単板積層材の表側面又は裏側面に対してなす角度をα，上記雌実の傾斜面が上記単板積層材の表側面又は裏側面に対してなす角度をβとしたとき，α＞βとなっていることを特徴とする大型木質積層板の製造方法にある（請求項１）。
【０００８】
次に，本発明の作用効果につき説明する。
上記製造方法によれば，複数の単板積層材をその端部に形成した上記Ｖ雄実とＶ雌実との嵌合によって接続し，上記大型木質積層板を製造する。そのため，上記単板積層材における実加工領域が小さくとも，上記単板積層材の接着面積を大きくすることができる。即ち，本発明によれば，スカーフジョイントの場合と同じ接着面積を得るに要する実加工領域を約半分にすることができる。
これにより，多くの原板を必要としないために安価であり，かつ強度の高い大型木質積層板を製造することができる。
【０００９】
また，上記熱圧締工程を行うことにより，上記接着剤塗布工程においてＶ雄実に塗布した熱硬化型の接着剤を，効率よく，充分に硬化させて，上記Ｖ雄実とＶ雌実とを固着することができる。そのため，単板積層材同士の接合強度を高くすることができ，強度に優れた大型木質積層板を製造することができる。
【００１０】
以上のごとく，本発明によれば，強度に優れた安価な大型木質積層板の製造方法を提供することができる。
【００１１】
第２の発明は，複数の単板積層材をその端部において接合してなる大型木質積層板であって，
該大型木質積層板は，トラックの荷台のフロアー板，煽り板，又は縦根太であり，
上記各単板積層材の端部には，断面Ｖ字状に突出したＶ雄実，又は断面Ｖ字状に後退したＶ雌実が形成されており，
隣り合う一方の上記単板積層材の上記Ｖ雄実と他の単板積層材の上記Ｖ雌実とは，熱硬化型の接着剤であるレゾルシノールを介して嵌合してあり，
また，上記Ｖ雄実及びＶ雌実の傾斜面は，上記単板積層材の表側面又は裏側面に対して５〜１５°の角度をもって傾斜しており，
上記Ｖ雄実とＶ雌実との嵌合部分は，接合前において，上記雄実の傾斜面が上記単板積層材の表側面又は裏側面に対してなす角度をα，上記雌実の傾斜面が上記単板積層材の表側面又は裏側面に対してなす角度をβとしたとき，α＞βとなっている状態において，上記Ｖ雌実の外方から加熱しながら圧締することにより接合してあることを特徴とする大型木質積層板にある（請求項５）。
【００１２】
次に，本発明の作用効果につき説明する。
上記大型木質積層板は，複数の単板積層材を，その端部に形成された上記Ｖ雄実とＶ雌実との嵌合によって，接合してなる。そのため，上記単板積層材における実加工領域が小さくとも，上記単板積層材の接着面積を大きくすることができる。即ち，本発明によれば，スカーフジョイントの場合と同じ接着面積を得るに要する実加工領域を約半分にすることができる。
これにより，多くの原板を必要しないために安価であり，かつ強度の高い大型木質積層板を得ることができる。
【００１３】
また，上記嵌合部分は，上記Ｖ雌実の外方から加熱しながら圧締してあるため，上記Ｖ雄実とＶ雌実とが，その間に介在した熱硬化型の接着剤が充分硬化した状態で固着される。そのため，単板積層材同士の接合強度が高く，強度に優れた大型木質積層板を得ることができる。
【００１４】
以上のごとく，本発明によれば，強度に優れた安価な大型木質積層板を提供することができる。
【００１５】
【発明の実施の形態】
上記第１の発明（請求項１）において，上記単板積層材としては，例えば，合板，ＬＶＬ等を用いることができる。また，上記熱硬化型の接着剤としては，例えば，レゾルシノール，フェノール，メラミン，ユリア等の熱硬化性樹脂があるが，特に，耐久性等の観点から，レゾルシノール若しくはフェノールが好ましい。
また，上記熱圧締工程においては，２枚の上記外壁板を互いに向き合う方向に押圧しながら，上記Ｖ雄実とＶ雌実との圧締を行うことが好ましい。この場合には，嵌合部分における表裏方向の圧締を行う際に，互いに嵌合させたＶ雄実とＶ雌実とが外れる方向へずれてしまうことを防止することができる。
【００１６】
また，上記熱圧締工程における圧締圧力は，０．４〜１ＭＰａ（４〜１０ｋｇｆ／ｃｍ²）であることが好ましい（請求項２）。
この場合には，嵌合部分に損傷を与えることなく，上記Ｖ雄実と上記Ｖ雌実とを，充分な強度で接合することができる。
上記圧締圧力が０．４ＭＰａ未満の場合には，上記Ｖ雄実と上記Ｖ雌実とを充分な強度で接合することが困難となるおそれがある。一方，上記圧締圧力が１ＭＰａを超える場合には，上記嵌合部分にプレスマークが形成され，大型木質積層板の外観意匠性を損ねるおそれがある。
【００１７】
また，上記熱圧締工程における加熱温度は，１２０〜１３０℃であることが好ましい（請求項３）。
この場合には，上記Ｖ雄実と上記Ｖ雌実とを，効率よく，充分な強度で接合することができる。
上記加熱温度が１２０℃未満の場合には，上記接着剤が効率よく充分に硬化しないおそれがあり，上記Ｖ雄実と上記Ｖ雌実とを，効率よく充分な強度で接合することが困難となるおそれがある。一方，上記加圧温度が１３０℃を超える場合には，開放冷却時，表層と内部の冷却速度に差を生じ，大型木質積層板に，反り，捻れを生ずるおそれがある。
【００１８】
また，上記Ｖ雄実及びＶ雌実の傾斜面は，上記単板積層材の表側面又は裏側面に対して５〜１５°の角度をもって傾斜している。
これにより，一層強度に優れた安価な大型木質積層板を得ることができる。
上記角度が１５°を超える場合には，接着面積を充分確保できず，上記嵌合部分の接合強度が不充分となり，大型木質積層板の強度を充分確保することが困難となるおそれがある。一方，上記角度が５°未満の場合には，上記嵌合部分の領域が大きくなり，原料コストが高くなるおそれがある。また，機械的な実加工精度の確保が困難となるおそれがある。
【００１９】
また，上記大型木質積層板を，例えばトラックの荷台のフロアー板や煽り板に用いる場合には，上記角度は，６〜８°であることが更に好ましい。また，上記大型木質積層板を，例えばトラックの荷台の縦根太に用いる場合には，上記角度は，１１〜１２°であることが更に好ましい。
【００２０】
また，熱圧締工程を行う前においては，上記Ｖ雄実の傾斜面が上記単板積層材の表側面又は裏側面に対する角度は，上記Ｖ雌実の傾斜面が上記単板積層材の表側面又は裏側面に対する角度よりも，若干大きいことが好ましい。これにより，上記Ｖ雄実と上記Ｖ雌実とを，両者の間に隙間を生ずることなく接合することができ，接合強度を充分に確保することができる。
【００２１】
また，上記複数の単板積層材は，表側面の木目の向きが略同一方向となるように接合することが好ましい（請求項４，請求項８）。
この場合には，上記大型木質積層板の表側面の木目が全体として揃うため，外観意匠性を向上させることができる。また，上記大型木質積層板をトラックの荷台のフロアー板等として用いる場合に，荷物を大型木質積層板上を円滑にスライドさせることができるという利点もある。
【００２２】
また，上記大型木質積層板は，トラックの荷台のフロアー板，煽り板，又は縦根太である。
これにより，強度に優れたフロアー板，煽り板，又は縦根太を安価に得ることができる。
【００２３】
次に，上記第２の発明（請求項５）において，上記嵌合部分は，０．４〜１ＭＰａ（４〜１０ｋｇｆ／ｃｍ²）の圧締圧力で圧締して接合してあることが好ましい（請求項６）。
この場合には，上記Ｖ雄実と上記Ｖ雌実との接合強度を，充分確保することができる。
【００２４】
また，上記嵌合部分は，１２０〜１３０℃の圧締温度をかけながら圧締して接合してあることが好ましい（請求項７）。
この場合には，上記Ｖ雄実と上記Ｖ雌実との接合強度を，充分確保することができる。
【００２５】
【実施例】
（実施例１）
本発明の実施例にかかる大型木質積層板及びその製造方法につき，図１〜図１２を用いて説明する。
特に，本例においては，図１２に示すようなトラックの荷台５のフロアー板５１として用いる大型木質積層板１の例につき説明する。
【００２６】
上記大型木質積層板の製造方法は，図１０，図１１に示すごとく，複数の単板積層材２をその端部において接合することにより大型木質積層板１を製造する方法である。
該製造方法においては，以下の実加工工程（図２）と，接着剤塗布工程（図３）と，嵌合工程（図４）と，熱圧締工程（図５）とを行うことにより，上記複数の単板積層材２を接合して大型木質積層板１を製造する。
【００２７】
上記実加工工程においては，図１に示すような各単板積層材２の端部に，図２に示すごとく，断面Ｖ字状に突出したＶ雄実２１，又は断面Ｖ字状に後退したＶ雌実２２を形成する。
上記接着剤塗布工程においては，図３に示すごとく，上記Ｖ雄実２１に熱硬化型の接着剤３を塗布する。
【００２８】
上記嵌合工程においては，図４に示すごとく，上記単板積層材２の上記Ｖ雄実２１と他の単板積層材２の上記Ｖ雌実２２とを嵌合させる。
上記熱圧締工程においては，図５に示すごとく，上記Ｖ雄実２１とＶ雌実２２との嵌合部分２３を，該Ｖ雌実２２の外方から加熱しながら圧締する。
【００２９】
上記Ｖ雄実２１及びＶ雌実２２の傾斜面２１１は，上記単板積層材２の表側面２４又は裏側面２５に対して，６°の角度をもって傾斜している。即ち，図８に示すごとく，上記Ｖ雄実２１の傾斜面２１１と，上記単板積層材２の表側面２４及び裏側面２５に平行な平面とのなす角度αは，６°である。また，図９に示すごとく，Ｖ雌実２２の傾斜面２１１と，上記単板積層材２の表側面２４及び裏側面２５と平行な平面とのなす角度βは，６°である。
また，熱圧締工程を行う前においては，上記Ｖ雄実２１における角度αは，上記Ｖ雌実２２における角度βよりも若干（例えば約０．１°）大きい。
【００３０】
上記単板積層材２は，図１に示すごとく，厚み約１．８ｍｍの単板２０を，９層積層してなり，全体として約１６．２ｍｍの厚みを有する。各層の単板２０は，基本的には，隣り合う層の単板２０の木目の方向が互いに直交するように，交互に積層されている。ただし，上記単板積層材２の表側面２４における最表層の単板２０１とその直下層の単板２０２とは，木目の方向が揃っている。同様に，裏側面２５における最表層の単板２０９とその直下層の単板２０８とは，木目の方向が揃っている。
また，上記単板２０同士は，フェノールからなる接着剤によって，接着してある。
【００３１】
また，上記単板積層材２は，図１０に示すごとく，縦２４２０ｍｍ×横１２１０ｍｍの長方形状を有する。そして，複数の単板積層材２を，図１０，図１１に示すごとく，短手方向に接合することにより大型木質積層板１を得る。
また，図１１に示すごとく，上記複数の単板積層材２は，表側面２４の木目の向きが略同一方向となるように接合する。
従って，上記単板積層材２の表側面２４に形成された木目の方向は，上記単板積層材２の短手方向に沿って形成されている。
【００３２】
上記接着剤塗布工程における，上記Ｖ雄実２１に塗布する上記熱硬化型の接着剤３としては，レゾルシノールを用いる。
該接着剤３は，図３に示すごとく，上記Ｖ雄実２１における２つの傾斜面２１１の全面に塗布する。
なお，上記接着剤３は，上記Ｖ雌実２２の傾斜面２２１に塗布しても，Ｖ雄実２１及びＶ雌実２２の傾斜面２１１，２２１の双方に塗布してもよい。
【００３３】
上記熱圧締工程における圧締圧力は，０．５ＭＰａ（５ｋｇｆ／ｃｍ²），加熱温度は１２０〜１３０℃である。
該熱圧締工程を行うに当っては，図６，図７に示すプレス装置４を用いる。
該プレス装置４は，熱盤下型４１１と熱盤上型４１２とを有するプレス機４１と，該プレス機４１の左右両側に配された基台４２と，各基台４２の上においてそれぞれ左右にスライド移動可能なスライド載置板４３とを有する。
【００３４】
該２つのスライド載置板４３は，引寄せ油圧シリンダー４４によって連結され，互いに引き寄せられることができるよう構成されている。即ち，上記引寄せ油圧シリンダー４４は，一方のスライド載置板４３に固定されたシリンダー部４４１と，該シリンダー部４４１に対して進退すると共に他方のスライド載置板４３にその先端が固定されたロッド部４４２とからなる。
【００３５】
また，上記スライド載置板４３の上方には，上押え油圧シリンダー４５が複数配置されており，上記スライド載置板４３に載置した単板積層材２を上方から押えて該単板積層材２をスライド載置台４３に固定することができるよう構成されている。
【００３６】
上記プレス装置４を用いて，上記Ｖ雄実２１とＶ雌実２２との嵌合部分２３を熱圧締するに当っては，図６，図７に示すごとく，上記熱盤下型４１１と熱盤上型４１２との間に配置するようにして，単板積層材２を上記スライド載置板４３に載置する。次いで，上記上押えシリンダー４５によって，上記単板積層材２を上記スライド載置板４３に押し付けて固定する。
【００３７】
次いで，上記引き寄せ油圧シリンダー４４によって，上記２つのスライド載置板４３を互いに引寄せる方向に付勢した状態で，上記熱盤上型４１２を下降させ，上記熱盤下型４１１とともに，上記嵌合部分２３を圧締する（図５）。これにより，上記Ｖ雄実２１とＶ雌実２２とが外れる方向にずれることを確実に防ぎつつ，熱圧締を行うことができる。
【００３８】
上記熱圧締工程の後には，必要に応じて，以下の工程を行う。
即ち，まず，熱圧締した上記嵌合部分２３に散水して，約１時間加水養生する。これにより単板積層材２に吸水させて，上記熱圧締により生じたプレスマークを消滅させる。
【００３９】
次いで，大型木質積層板１の表側面を，サンダーによって仕上げる。
次いで，全体の長さと幅を所望の寸法に合わせるべく，大型木質積層板１の端部をカッティングする。次いで，大型木質積層板１の表面に塗装を施す。
【００４０】
次に，本例の作用効果につき説明する。
上記大型木質積層板１は，図４に示すごとく，複数の単板積層材２をその端部に形成された上記Ｖ雄実２１とＶ雌実２２との嵌合によって，接合してなる。そのため，上記単板積層材２における実加工領域Ａ（図８，図９）が小さくとも，上記単板積層材２の接着面積を大きくすることができる。即ち，本発明によれば，スカーフジョイント（図１４）の場合と同じ接着面積を得るに要する実加工領域Ａを約半分にすることができる。
これにより，多くの原板を必要としないために安価であり，かつ強度の高い大型木質積層板１を得ることができる。
【００４１】
また，上記嵌合部分２３は，上記Ｖ雌実２２の外方から加熱しながら圧締してあるため，上記Ｖ雄実２１とＶ雌実２２とが，その間に介在した熱硬化型の接着剤３が充分硬化した状態で固着される。そのため，単板積層材２同士の接合強度が高く，強度に優れた大型木質積層板１を得ることができる。
【００４２】
また，上記熱圧締工程における圧締圧力が０．５ＭＰａであるため，嵌合部分２３に損傷を与えることなく，上記Ｖ雄実２１と上記Ｖ雌実２２とを，充分な強度で接合することができる。
また，上記熱圧締工程における加熱温度が１２０〜１３０℃であるため，上記Ｖ雄実と上記Ｖ雌実とを，効率よく，充分な強度で接合することができる。
【００４３】
また，図８，図９に示すごとく，上記Ｖ雄実２１及びＶ雌実２２の傾斜面２１１，２２１は，単板積層材２の表側面２４又は裏側面２５に対して，６°の角度をもって傾斜している。そのため，一層強度に優れた安価な大型木質積層板１を得ることができる。
【００４４】
また，熱圧締工程を行う前においては，上記Ｖ雄実２１の傾斜面２１１が上記単板積層材２の表側面２４又は裏側面２５に対する角度αは，上記Ｖ雌実２２の傾斜面２２１が上記単板積層材２の表側面２４又は裏側面２５に対する角度βよりも，若干大きい。これにより，上記Ｖ雄実２１と上記Ｖ雌実２２とを，両者の間に隙間を生ずることなく接合することができ，接合強度を充分に確保することができる。
【００４５】
また，上記複数の単板積層材２は，表側面２４の木目の向きが略同一方向となるように接合する。これにより，図１１に示すごとく，上記大型木質積層板１の表側面２４の木目が全体として揃うため，外観意匠性を向上させることができる。また，上記大型木質積層板１を，図１２に示すごとく，トラックの荷台５のフロアー板５１として用いたとき，荷物をフロアー板５１上において円滑にスライドさせることができるという利点もある。
【００４６】
以上のごとく，本例によれば，強度に優れた安価な大型木質積層板及びその製造方法を提供することができる。
【００４７】
（実施例２）
本例は，図１３に示すごとく，トラックの荷台５の縦根太５２として用いる大型木質積層板１０の例である。
上記縦根太５２は，上記トラックの荷台５の下面において，上記フロアー板５１に，横根太５４と共に裏打ちされた前後方向の補強材である。
上記縦根太５２は，幅１４０ｍｍ，厚み５０ｍｍであり，幅方向が上下方向になるように，荷台５の下面に配されている。
【００４８】
本例の大型木質積層板１０を構成する単板積層材２においては，Ｖ雄実２１及びＶ雌実２２の傾斜面２１１，２２１と，単板積層材２の表側面２４又は裏側面２５となす角度γが，１１°である。
その他は，実施例１と同様である。
【００４９】
この場合には，強度に優れた安価な大型木質積層板からなる縦根太を提供することができる。
また，上記角度γが，１１°であるため，強度に優れた安価な大型木質積層板１０を確実に得ることができる。
その他は，実施例１と同様の作用効果を有する。
【００５０】
（実施例３）
本例は，トラックの荷台５の煽り板５３（図１２参照）として用いる大型木質積層板１００の例である。
本例の大型木質積層板１００を構成する単板積層材２は，その幅が３３０ｍｍであること以外は，実施例１と同様である。
【００５１】
この場合には，強度に優れた安価な大型木質積層板からなる煽り板を提供することができる。
その他は，実施例１と同様の作用効果を有する。
【００５２】
なお，上記実施例１〜３に示したトラックの荷台のフロアー板，縦根太，煽り板以外にも，本発明の大型木質積層板は，例えば，住宅の屋根下地，壁下地，構造用長尺梁，コンテナーフロアー等，種々の用途に適用することができる。
【図面の簡単な説明】
【図１】実施例１における，実加工前の単板積層材の端部の斜視図。
【図２】実施例１における，Ｖ雄実及びＶ雌実の斜視図。
【図３】実施例１における，接着剤塗布後のＶ雄実及びＶ雌実の斜視図。
【図４】実施例１における，大型木質積層板の嵌合部分の斜視図。
【図５】実施例１における，熱圧締工程の断面説明図。
【図６】実施例１における，プレス装置の側面説明図。
【図７】実施例１における，プレス装置の平面説明図。
【図８】実施例１における，Ｖ雄実の断面説明図。
【図９】実施例１における，Ｖ雌実の断面説明図。
【図１０】実施例１における，嵌合前の単板積層材の平面図。
【図１１】実施例１における，大型木質積層板の平面図。
【図１２】実施例１における，大型木質積層板を用いたトラックの荷台の斜視図。
【図１３】実施例２における，トラックの荷台の底面図。
【図１４】従来例における，スカーフジョイントの斜視図。
【符号の説明】
１．．．大型木質積層板，
２．．．単板積層材，
２１．．．Ｖ雄実，
２２．．．Ｖ雌実，
２３．．．嵌合部分，
３．．．接着剤，
４．．．プレス装置，[0001]
【Technical field】
The present invention relates to a large-sized wood laminate formed by joining a plurality of single-plate laminates at the ends thereof, and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, there is a method of manufacturing a large-sized wood laminate by joining a plurality of single-plate laminates at their ends.
In the manufacturing method of the large wooden laminate, as shown in FIG. 14, the ends of adjacent single-plate laminates are joined by a so-called scarf joint. That is, the end portion of the single-plate laminated material 92 is cut in one plane that is inclined with respect to the front side surface 924 and the back side surface 925, and the scarf inclined surfaces 923 that are the cut surfaces are bonded to each other with the adhesive 93. And join.
[0003]
[Patent Document 1]
JP-A-2002-187105 [0004]
[Problems to be solved]
However, the conventional large wooden laminate 9 has the following problems.
That is, when a plurality of single-plate laminates 92 are joined using a scarf joint, there is a possibility that the strength cannot be sufficiently ensured. For example, when the large-sized wood laminate 92 is used for a load-bearing material such as a floor plate of a truck bed (see reference numeral 51 in FIG. 12), it is difficult to ensure a sufficient strength to withstand the load. There is a case.
[0005]
Moreover, in order to ensure the joining strength in the scarf joint part, it is necessary to enlarge the joining area. That is, it is necessary to enlarge the scarf slope 923, and it is necessary to ensure a large formation region B of the scarf slope 923. Therefore, when trying to obtain a large-sized wood laminate 9 having the same size, a large number of necessary original plates are required, and there is a problem that raw material costs are increased.
[0006]
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an inexpensive large-sized wood laminate having excellent strength and a method for manufacturing the same.
[0007]
[Means for solving problems]
The first invention is a method of manufacturing a large-sized wood laminate by joining a plurality of veneer laminates at the ends thereof,
The above large wooden laminate is a floor plate of a truck bed, a twisted plate, or a vertical joist,
An actual processing step of forming a V male projecting in a V-shaped cross section or a V female projecting in a V-shaped cross section at an end of each single-plate laminated material;
An adhesive application step of applying resorcinol , which is a thermosetting adhesive, to one or both of the V male fruit and the V female fruit;
A fitting step for fitting the V male of the single-plate laminate and the V female of another single-plate laminate;
The plurality of single-plate laminates are joined by performing a hot-pressing step of pressing the fitting portion between the V male fruit and the V female fruit while heating from the outside of the V female fruit. Manufacturing large wooden laminates,
Further, the inclined surfaces of the V male and V females are inclined at an angle of 5 to 15 ° with respect to the front side surface or the back side surface of the single-plate laminated material,
Before performing the hot pressing step, the angle formed by the male inclined surface with respect to the front side surface or the back side surface of the single plate laminate is α, and the female inclined surface is the single plate laminate. When the angle formed with respect to the front side surface or the back side surface is β, α> β is satisfied.
[0008]
Next, the effects of the present invention will be described.
According to the manufacturing method, a plurality of single-plate laminates are connected by fitting the V males and V females formed at the ends thereof to manufacture the large wooden laminate. Therefore, even if the actual processing area in the single-plate laminate is small, the bonding area of the single-plate laminate can be increased. That is, according to the present invention, the actual processing area required to obtain the same adhesion area as in the case of the scarf joint can be halved.
Thereby, since many original plates are not required, it is cheap and can manufacture a large-sized wooden laminate with high strength.
[0009]
In addition, by performing the above-described hot pressing process, the thermosetting adhesive applied to the V male in the adhesive applying process is efficiently and sufficiently cured to form the V male and V female. It can be fixed. Therefore, the joint strength between the single plate laminates can be increased, and a large-sized wood laminate having excellent strength can be manufactured.
[0010]
As described above, according to the present invention, it is possible to provide a method for manufacturing an inexpensive large-sized wood laminate having excellent strength.
[0011]
The second invention is a large-sized wood laminate in which a plurality of single-plate laminates are joined at their ends,
The large wooden laminate is a floor board, a rafter, or a vertical joist of a truck bed,
At the end of each single-plate laminate, a V male fruit that protrudes in a V-shaped cross section or a V female fruit that recedes in a V-shaped cross section is formed.
The V male fruit of one of the adjacent single-plate laminates and the V female fruit of the other single-plate laminate are fitted via resorcinol , which is a thermosetting adhesive,
Further, the inclined surfaces of the V male and V females are inclined at an angle of 5 to 15 ° with respect to the front side surface or the back side surface of the single-plate laminated material,
The fitting part between the V male and the V female is such that, before joining, the angle formed by the inclined surface of the male with respect to the front side surface or the back side surface of the single-plate laminate is α, When the angle formed by the surface with respect to the front side surface or the back side surface of the single-plate laminated material is β, by pressing while heating from the outside of the V female body in a state where α> β It exists in the large sized wood laminated board characterized by having joined (Claim 5 ).
[0012]
Next, the effects of the present invention will be described.
The large-sized wood laminate is formed by joining a plurality of single-plate laminates by fitting the V male and V female formed at the ends thereof. Therefore, even if the actual processing area in the single-plate laminate is small, the bonding area of the single-plate laminate can be increased. That is, according to the present invention, the actual processing area required to obtain the same adhesion area as in the case of the scarf joint can be halved.
Thereby, since many original plates are not required, it is possible to obtain a large-sized wood laminate that is inexpensive and has high strength.
[0013]
Further, since the fitting portion is pressed while being heated from the outside of the V female fruit, the thermosetting adhesive interposed between the V male fruit and the V female fruit is sufficiently cured. It is fixed in the state. Therefore, a large wood laminate having high bonding strength between the single laminates and excellent strength can be obtained.
[0014]
As described above, according to the present invention, an inexpensive large-sized wood laminate having excellent strength can be provided.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
In the first invention (invention 1), as the single-plate laminated material, for example, plywood, LVL, or the like can be used. Examples of the thermosetting adhesive include thermosetting resins such as resorcinol, phenol, melamine, and urea. Resorcinol or phenol is particularly preferable from the viewpoint of durability and the like.
In the hot-pressing step, it is preferable that the V male and the V female are pressed while pressing the two outer wall plates in a direction facing each other. In this case, it is possible to prevent the V male fruit and the V female fruit fitted to each other from being displaced in a direction in which they are disengaged when the fitting part is pressed in the front and back direction.
[0016]
Moreover, it is preferable that the pressing pressure in the said hot pressing process is 0.4-1 MPa (4-10 kgf / cm < ² >) (Claim 2).
In this case, the V male and the V female can be joined with sufficient strength without damaging the fitting portion.
When the pressing pressure is less than 0.4 MPa, it may be difficult to join the V male and the V female with sufficient strength. On the other hand, when the pressing pressure exceeds 1 MPa, a press mark is formed in the fitting portion, which may impair the appearance design of the large wooden laminate.
[0017]
Moreover, it is preferable that the heating temperature in the said hot pressing process is 120-130 degreeC (Claim 3).
In this case, the V male fruit and the V female fruit can be efficiently joined with sufficient strength.
When the heating temperature is less than 120 ° C., the adhesive may not be cured efficiently and sufficiently, and it is difficult to efficiently join the V male fruit and the V female fruit with sufficient strength. There is a risk. On the other hand, when the pressurization temperature exceeds 130 ° C., a difference in the cooling rate between the surface layer and the inside occurs during open cooling, which may cause warping and twisting of the large wooden laminate.
[0018]
Further, the inclined surface of the V Omi and V Mesumi are you are inclined at an angle of 5 to 15 ° with respect to the front surface or back surface of the laminated veneer lumber.
As a result , an inexpensive large-sized wood laminate having higher strength can be obtained.
If the angle exceeds 15 °, the bonding area cannot be secured sufficiently, the joining strength of the fitting portion becomes insufficient, and it may be difficult to secure the strength of the large wooden laminate. On the other hand, if the angle is less than 5 °, the area of the fitting portion becomes large, which may increase the raw material cost. In addition, it may be difficult to ensure the actual machining accuracy.
[0019]
Moreover, when using the said large timber laminated board for the floor board of a truck bed, or a turn board, for example, it is still more preferable that the said angle is 6-8 degrees. Moreover, when using the said large timber laminated board for the vertical joist of a truck bed, for example, it is still more preferable that the said angle is 11-12 degrees.
[0020]
In addition, before the hot pressing process, the angle of the V male slant surface with respect to the front side surface or the back side surface of the veneer laminate is such that the V female slant surface is the front surface of the veneer laminate. It is preferably slightly larger than the angle with respect to the side or back side. As a result, the V male seed and the V female seed can be joined without creating a gap between them, and a sufficient joining strength can be ensured.
[0021]
Further, it is preferable that the plurality of single-plate laminates are joined so that the direction of the grain of the front side is substantially the same direction (Claims 4 and 8 ).
In this case, since the grain of the front side of the large wooden laminate is aligned as a whole, the appearance design can be improved. In addition, when the large wooden laminate is used as a floor plate of a truck bed, there is an advantage that the load can be smoothly slid on the large wooden laminate.
[0022]
Further, the large wood laminate, bed floor plate of the track, tilting plate, or a longitudinal joists.
As a result , a floor board, a ribbed board, or a vertical joist having excellent strength can be obtained at a low cost.
[0023]
Next, in the second invention (invention 5 ), it is preferable that the fitting portion is pressed and bonded with a pressing pressure of 0.4 to 1 MPa (4 to 10 kgf / cm ² ). (Claim 6 ).
In this case, the bonding strength between the V male fruit and the V female fruit can be sufficiently secured.
[0024]
Moreover, it is preferable that the fitting portion is pressed and joined while applying a pressing temperature of 120 to 130 ° C. (Claim 7 ).
In this case, the bonding strength between the V male fruit and the V female fruit can be sufficiently secured.
[0025]
【Example】
(Example 1)
A large-sized wood laminate according to an embodiment of the present invention and a manufacturing method thereof will be described with reference to FIGS.
In particular, in this example, an example of a large wooden laminate 1 used as a floor board 51 of a truck bed 5 as shown in FIG. 12 will be described.
[0026]
As shown in FIGS. 10 and 11, the method for manufacturing the large wooden laminate is a method for manufacturing the large wooden laminate 1 by joining a plurality of single-plate laminates 2 at their ends.
In the manufacturing method, by performing the following actual processing step (FIG. 2), adhesive application step (FIG. 3), fitting step (FIG. 4), and hot pressing step (FIG. 5), The large-sized wood laminate 1 is manufactured by joining the plurality of single-plate laminates 2.
[0027]
In the actual processing step, as shown in FIG. 2, V male solid 21 projecting in a V-shaped cross section or retreating into a V-shaped cross section as shown in FIG. V female seed 22 is formed.
In the adhesive application step, as shown in FIG. 3, the thermosetting adhesive 3 is applied to the V male 21.
[0028]
In the fitting step, as shown in FIG. 4, the V male fruit 21 of the single-plate laminated material 2 and the V female fruit 22 of another single-plate laminated material 2 are fitted.
In the hot-pressing step, as shown in FIG. 5, the fitting portion 23 between the V male fruit 21 and the V female fruit 22 is pressed while being heated from the outside of the V female fruit 22.
[0029]
The inclined surfaces 211 of the V male fruit 21 and the V female fruit 22 are inclined at an angle of 6 ° with respect to the front side surface 24 or the back side surface 25 of the single-plate laminated material 2. That is, as shown in FIG. 8, the angle α formed by the inclined surface 211 of the V male 21 and the plane parallel to the front side surface 24 and the back side surface 25 of the single-plate laminated material 2 is 6 °. As shown in FIG. 9, the angle β formed by the inclined surface 211 of the V female fruit 22 and the plane parallel to the front side surface 24 and the back side surface 25 of the single-plate laminated material 2 is 6 °.
Further, before performing the hot-pressing step, the angle α in the V male fruit 21 is slightly larger (for example, about 0.1 °) than the angle β in the V female fruit 22.
[0030]
As shown in FIG. 1, the single plate laminate 2 is formed by laminating nine layers of a single plate 20 having a thickness of about 1.8 mm, and has a thickness of about 16.2 mm as a whole. The single plates 20 of each layer are basically stacked alternately so that the grain directions of the adjacent single plates 20 are orthogonal to each other. However, the outermost single plate 201 and the immediately lower single plate 202 on the front side surface 24 of the single plate laminate 2 have the same grain direction. Similarly, the outermost single plate 209 and the immediately lower single plate 208 on the back side surface 25 have the same grain direction.
The single plates 20 are bonded to each other with an adhesive made of phenol.
[0031]
Further, as shown in FIG. 10, the single plate laminate 2 has a rectangular shape of 2420 mm long × 1210 mm wide. And as shown in FIG. 10, FIG. 11, the large sized wood laminated board 1 is obtained by joining the several single board laminated material 2 to a transversal direction.
In addition, as shown in FIG. 11, the plurality of single-plate laminates 2 are joined so that the direction of the grain of the front side surface 24 is substantially the same direction.
Therefore, the direction of the grain formed on the front side surface 24 of the single plate laminate 2 is formed along the short direction of the single plate laminate 2.
[0032]
Resorcinol is used as the thermosetting adhesive 3 applied to the V male 21 in the adhesive application step.
As shown in FIG. 3, the adhesive 3 is applied to the entire surface of the two inclined surfaces 211 in the V male 21.
The adhesive 3 may be applied to the inclined surface 221 of the V female fruit 22 or may be applied to both the V male fruit 21 and the inclined surfaces 211 and 221 of the V female fruit 22.
[0033]
The pressing pressure in the hot pressing process is 0.5 MPa (5 kgf / cm ² ), and the heating temperature is 120 to 130 ° C.
In performing the hot pressing process, a press device 4 shown in FIGS. 6 and 7 is used.
The press device 4 includes a press machine 41 having a hot platen lower mold 411 and a hot platen upper mold 412, a base 42 disposed on both the left and right sides of the press machine 41, and a right and left on each base 42. And a slide mounting plate 43 that is slidably movable.
[0034]
The two slide mounting plates 43 are connected by a pulling hydraulic cylinder 44 so that they can be pulled toward each other. That is, the pulling hydraulic cylinder 44 has a cylinder portion 441 fixed to one slide mounting plate 43, and advances and retreats with respect to the cylinder portion 441, and a tip thereof is fixed to the other slide mounting plate 43. Rod portion 442.
[0035]
Further, a plurality of upper presser hydraulic cylinders 45 are arranged above the slide mounting plate 43, and the single plate laminated material 2 placed on the slide mounting plate 43 is pressed from above. 2 can be fixed to the slide mounting table 43.
[0036]
When the press portion 4 is used to hot-clamp the fitting portion 23 between the V male fruit 21 and the V female fruit 22, as shown in FIGS. The single-plate laminated material 2 is placed on the slide placement plate 43 so as to be placed between the hot platen die 412. Next, the single plate laminated material 2 is pressed against the slide mounting plate 43 by the upper presser cylinder 45 and fixed.
[0037]
Next, with the drawing hydraulic cylinder 44 urging the two slide mounting plates 43 toward each other, the hot platen upper die 412 is lowered, and together with the hot platen lower die 411, the fitting The part 23 is clamped (FIG. 5). Thereby, it is possible to perform the hot pressing while reliably preventing the V male fruit 21 and the V female fruit 22 from being displaced in the direction of detachment.
[0038]
After the hot pressing process, the following processes are performed as necessary.
That is, first, water is sprinkled on the fitting portion 23 that has been hot-pressed, and then cured for about 1 hour. As a result, the single-plate laminate 2 is made to absorb water, and the press mark generated by the hot pressing is extinguished.
[0039]
Next, the front side surface of the large wooden laminate 1 is finished with a sander.
Next, the end portion of the large wooden laminate 1 is cut in order to adjust the overall length and width to desired dimensions. Next, the surface of the large wooden laminate 1 is painted.
[0040]
Next, the effect of this example will be described.
As shown in FIG. 4, the large wooden laminate 1 is formed by joining a plurality of single-plate laminates 2 by fitting V males 21 and V females 22 formed at the ends thereof. Therefore, even if the actual processing area A (FIGS. 8 and 9) in the single plate laminate 2 is small, the bonding area of the single plate laminate 2 can be increased. That is, according to the present invention, the actual processing area A required to obtain the same adhesion area as that of the scarf joint (FIG. 14) can be reduced to about half.
Thereby, since many original plates are not required, the large-sized wooden laminate 1 which is inexpensive and has high strength can be obtained.
[0041]
Further, since the fitting portion 23 is pressed while being heated from the outside of the V female fruit 22, the V male fruit 21 and the V female fruit 22 are interposed between the thermosetting adhesives. The agent 3 is fixed in a sufficiently cured state. Therefore, it is possible to obtain a large wood laminate 1 having a high bonding strength between the single plate laminates 2 and excellent strength.
[0042]
Further, since the pressing pressure in the hot pressing process is 0.5 MPa, the V male fruit 21 and the V female fruit 22 are joined with sufficient strength without damaging the fitting portion 23. be able to.
Moreover, since the heating temperature in the said hot pressing process is 120-130 degreeC, the said V male and the said V female can be efficiently joined with sufficient intensity | strength.
[0043]
Further, as shown in FIGS. 8 and 9, the inclined surfaces 211 and 221 of the V male fruit 21 and the V female fruit 22 are at an angle of 6 ° with respect to the front side surface 24 or the back side surface 25 of the veneer laminate 2. It is inclined with. Therefore, it is possible to obtain an inexpensive large-sized wood laminate 1 having further excellent strength.
[0044]
In addition, before performing the hot pressing process, the angle α of the inclined surface 211 of the V male body 21 with respect to the front side surface 24 or the back side surface 25 of the single-plate laminated material 2 is the inclined surface 221 of the V female body 22. Is slightly larger than the angle β with respect to the front side surface 24 or the back side surface 25 of the single-plate laminate 2. Thereby, the V male fruit 21 and the V female fruit 22 can be joined without generating a gap between them, and a sufficient joining strength can be ensured.
[0045]
The plurality of single-plate laminates 2 are joined so that the grain directions of the front side surface 24 are substantially the same. As a result, as shown in FIG. 11, the grain of the front side surface 24 of the large wooden laminate 1 is aligned as a whole, so that the appearance design can be improved. Further, as shown in FIG. 12, when the large wooden laminate 1 is used as the floor plate 51 of the truck bed 5, there is an advantage that the load can be smoothly slid on the floor plate 51.
[0046]
As described above, according to this example, it is possible to provide an inexpensive large-sized wooden laminate having excellent strength and a method for manufacturing the same.
[0047]
(Example 2)
This example is an example of a large wooden laminate 10 used as a vertical joist 52 of a truck bed 5, as shown in FIG.
The vertical joists 52 are reinforcing members in the front-rear direction that are lined with the floor joists 54 on the floor plate 51 on the lower surface of the loading platform 5 of the truck.
The vertical joists 52 have a width of 140 mm and a thickness of 50 mm, and are arranged on the lower surface of the loading platform 5 so that the width direction is the vertical direction.
[0048]
In the single plate laminated material 2 constituting the large wooden laminate 10 of this example, the inclined surfaces 211 and 221 of the V male fruit 21 and the V female fruit 22, the front side surface 24 or the back side surface 25 of the single plate laminated material 2, The formed angle γ is 11 °.
Others are the same as in the first embodiment.
[0049]
In this case, it is possible to provide a vertical joist made of an inexpensive large-sized wood laminate having excellent strength.
Further, since the angle γ is 11 °, an inexpensive large-sized wood laminate 10 having excellent strength can be obtained with certainty.
The other functions and effects are the same as those of the first embodiment.
[0050]
(Example 3)
This example is an example of a large wooden laminate 100 used as a cover plate 53 (see FIG. 12) of the truck bed 5.
The veneer laminate 2 constituting the large wood laminate 100 of this example is the same as that of Example 1 except that its width is 330 mm.
[0051]
In this case, it is possible to provide a twisted board made of an inexpensive large-sized wood laminate having excellent strength.
The other functions and effects are the same as those of the first embodiment.
[0052]
In addition to the floorboard, vertical joist, and roof board of the truck bed shown in the first to third embodiments, the large wooden laminate of the present invention is, for example, a house roof foundation, a wall foundation, and a long structure. It can be applied to various uses such as beams and container floors.
[Brief description of the drawings]
FIG. 1 is a perspective view of an end portion of a single plate laminated material before actual processing in Example 1. FIG.
2 is a perspective view of a V male and a V female in Example 1. FIG.
3 is a perspective view of a V male and a V female after application of an adhesive in Example 1. FIG.
4 is a perspective view of a fitting portion of a large-sized wood laminate in Example 1. FIG.
5 is a cross-sectional explanatory view of a hot pressing process in Embodiment 1. FIG.
FIG. 6 is an explanatory side view of a press device according to the first embodiment.
7 is an explanatory plan view of a press device in Embodiment 1. FIG.
8 is a cross-sectional explanatory view of a V male in Example 1. FIG.
FIG. 9 is a cross-sectional explanatory view of a V female seed in Example 1.
10 is a plan view of a single plate laminated material before fitting in Example 1. FIG.
11 is a plan view of a large-sized wood laminate in Example 1. FIG.
12 is a perspective view of a truck bed using a large wooden laminate in Example 1. FIG.
13 is a bottom view of a truck bed in Example 2. FIG.
FIG. 14 is a perspective view of a scarf joint in a conventional example.
[Explanation of symbols]
1. . . Large wood laminate,
2. . . Veneer laminate,
21. . . V Yumi,
22. . . V female fruit,
23. . . Mating part,
3. . . adhesive,
4). . . Press machine,

Claims

A method of manufacturing a large wooden laminate by joining a plurality of single-plate laminates at their ends,
The large wooden laminate is a floor board, a slab, or a vertical joist of a truck bed,
An actual processing step of forming a V male projecting in a V-shaped cross section or a V female projecting in a V-shaped cross section at an end of each single-plate laminated material;
An adhesive application step of applying resorcinol , which is a thermosetting adhesive, to one or both of the V male fruit and the V female fruit;
A fitting step of fitting the V male of the single-plate laminate with the V female of another single-plate laminate;
The plurality of single-plate laminates are joined by performing a hot-pressing step of pressing the fitting portion between the V male fruit and the V female fruit while heating from the outside of the V female fruit. Manufacturing large wooden laminates,
Further, the inclined surfaces of the V male and V females are inclined at an angle of 5 to 15 ° with respect to the front side surface or the back side surface of the single-plate laminated material,
Before performing the hot pressing step, the angle formed by the male inclined surface with respect to the front side surface or the back side surface of the single plate laminate is α, and the female inclined surface is the single plate laminate. A method for producing a large wooden laminate , wherein α> β, where β is an angle formed with respect to the front side surface or the back side surface .

The method for producing a large-sized wood laminate according to claim 1, wherein the pressing pressure in the hot pressing step is 0.4 to 1 MPa.

The method for producing a large wooden laminate according to claim 1 or 2, wherein the heating temperature in the hot pressing step is 120 to 130 ° C.

The method for producing a large-sized wood laminate according to any one of claims 1 to 3 , wherein the plurality of single-plate laminates are joined so that the grain directions of the front side faces are substantially the same.

A large-sized wood laminate formed by joining a plurality of veneer laminates at the ends,
The large wooden laminate is a floor board, a rafter, or a vertical joist of a truck bed,
At the end of each single-plate laminate, a V male fruit that protrudes in a V-shaped cross section or a V female fruit that recedes in a V-shaped cross section is formed.
The V male fruit of one of the adjacent single-plate laminates and the V female fruit of the other single-plate laminate are fitted via resorcinol , which is a thermosetting adhesive,
Further, the inclined surfaces of the V male and V females are inclined at an angle of 5 to 15 ° with respect to the front side surface or the back side surface of the single-plate laminated material,
The fitting part between the V male and the V female is such that, before joining, the angle formed by the inclined surface of the male with respect to the front side surface or the back side surface of the single-plate laminate is α, When the angle formed by the surface with respect to the front side surface or the back side surface of the single-plate laminated material is β, by pressing while heating from the outside of the V female body in a state where α> β A large wood laminate characterized by being joined.

6. The large wood laminate according to claim 5, wherein the fitting portion is pressed and joined with a pressure of 0.4 to 1 MPa.

The large wood laminate according to claim 5 or 6, wherein the fitting portion is pressed and joined while applying a pressing temperature of 120 to 130 ° C.

The large-sized wood laminate according to any one of claims 5 to 7 , wherein the plurality of single-plate laminates are joined so that the grain direction of the front side is substantially the same direction.