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JP4077575B2 - Application method of adhesive to notch of plate - Google Patents

Application method of adhesive to notch of plate Download PDF

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Publication number
JP4077575B2
JP4077575B2 JP07207899A JP7207899A JP4077575B2 JP 4077575 B2 JP4077575 B2 JP 4077575B2 JP 07207899 A JP07207899 A JP 07207899A JP 7207899 A JP7207899 A JP 7207899A JP 4077575 B2 JP4077575 B2 JP 4077575B2
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Japan
Prior art keywords
adhesive
plate
single plate
conveyor
nozzle
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JP07207899A
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JP2000263514A (en
Inventor
敏行 大塚
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Meinan Machinery Works Inc
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Meinan Machinery Works Inc
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Description

【0001】
【発明の属する技術分野】
本発明は、ベニヤ単板(以下単板という)等の板状体を接合する際、板状体の端部に形成された切欠部への接着剤の塗布方法に関するものである。
この切欠部を形成することにより、板状体は端部に、板状体の表裏面に対し傾斜した又は平行な面を有している。
【0002】
【従来の技術】
従来例えば単板の接合において、単板のスカーフカット部に接着剤を塗布する場合、以下の様に行っていた。
即ち、例えば図27に示す様に、傾斜した面101に予め接着剤103を、矢印で示す単板107の移動方向と直交する方向に適宜間隔で粒状に付着させておき、スカーフカット部105を有する単板107を矢印の方向に移動させて、スカーフカット部105により接着剤103をすくい取る方法が実施されている。この様に単板107の接着剤が付着されたスカーフカット部105と、図示しないが他の単板で接着剤が付着されていないスカーフカット部とを重ね合わせ、接合するのである。
また図28に示す様に、接近した状態で互いに逆方向に回転するロール109、111の周面に接着剤を付着させておき、矢印の様に単板107の先端を上昇させてスカーフカット部105に接着剤を付着させる方法が実施されている。
【0003】
【発明が解決すべき課題】
しかるに、前者においては前記の様に両スカーフカット部を重ね合わせることで、スカーフカット部105に付着した粒状の接着剤が両スカーフカット部全体に押し広げられるが、両スカーフカット部の表面の細かな凹凸等のため接着剤が該両面全体に均一に広げることは困難であり、十分な接合力が得られにくい。
この場合、粒状の接着剤の数や1粒あたりの接着剤の量を増やすと、十分な接合力が得られるが、接着剤のコストが大となり、また押し広げられた接着剤がスカーフカット部の傾斜面に続く単板表面にも多量に塗布されてしまう。そのため、接合後単板を順次堆積すると接合単板同士が付着してしまい、堆積された単板を1枚づつ取り出すことが困難となる。
また後者の方法においても、スカーフカット部に付着した接着剤を押し広げるので、同様の問題がある。
【0004】
【課題を解決するための手段】
本発明はこれら問題を解決するために、板状体の端部に切欠部を形成することにより得られた板状体の表裏面に対し傾斜した又は平行な面に接着剤を塗布する際、切欠部の先端に向かう方向の全幅に対応して接着剤を噴出する噴出孔を備えたノズルを、該傾斜した又は平行な面に相対した状態で、板状体の切欠部の先端と直交する一方の端縁から他方の端縁に至るまで該先端と平行に移動させるものである。
この場合ノズルを、該ノズルのある同一水平面において回動自在に設けてもよい。
また板状体の端部に切欠部を形成することにより得られた板状体の表裏面に対し傾斜した又は平行な面に接着剤を塗布する際、切欠部の先端に向かう方向の全幅に対応して接着剤を噴出する噴出孔を備えたノズルを、該ノズルのある同一水平面において回動自在に設け、板状体を、該傾斜した又は平行な面に相対した状態で、前記先端に向かう方向と直交する方向に移動させてもよい。
【0005】
【発明の実施の形態】
次に本発明の実施の形態を説明する。
装置の側面説明図である図1及び図1の一点鎖線A−Aより矢印方向を見た平面説明図である図2に示す様に、単板を搬送するための正走行及び停止自在の第1コンベア1、正走行、逆走行及び停止自在の第2コンベア3を1列状に並べて配置する。
ここで正走行とは、図1において単板を右方向に搬送するべくコンベアが右方向に走行する状態を意味し、また逆走行とは単板を左方向に搬送するべくコンベアが左方向に走行する状態を意味する。
各コンベア1、3には作動部材として各々例えばサーボモータ5及び7を設け、制御機構25により後述する様に走行及び停止が制御され、また第1及び2コンベアが正走行する時は、互いに等しい速さとなっている。
第1コンベア1及び第2コンベア3の間には、以下の部材を備える。
即ち、第1コンベア1側には、作動部材の1つであるエアシリンダ9により、実線で示す待機位置と、後述する単板の搬送を妨げる下降位置との間を上下動し、単板の搬送方向と直交する方向の幅全体が当接可能な長さのストッパー11を設ける。
【0006】
また上下方向では図1に示した高さにあり、通常は、第1コンベア1の走行方向と直交する方向の両側で第1コンベア1から各々所定距離離れ且つストッパー11に近い2箇所の待機位置の何れか一方の該位置に待機しており、後述する様に制御機構25からの制御信号によって、往復移動部材(図示せず)により第1コンベア1の走行方向と直交する方向でストッパー11と平行に水平往復移動及び停止自在のノズル13を備える。
ノズル13は下面側に多数の接着剤を噴出するための噴出孔(図示せず)を、後述する単板のスカーフカット部の厚さが厚い部分から厚さの薄い先端に向かう方向(以下厚薄方向という)の全幅に対応して備えており、またノズル13には加熱されて溶融した熱可塑性接着剤を収容したタンク(図示せず)から該接着剤を供給するためのホース15が接続されている。
タンクには空気圧縮器(図示せず)が備えられており、空気圧縮器を作動させて該接着剤を加圧しノズル13の噴出孔から該接着剤を噴出させたり、又は空気圧縮器の作動を停止させることにより該接着剤の噴出を停止させることが可能となっている。
ノズル13が水平移動する際の移動量は、図示しないが往復移動部材に設けたロータリエンコーダにより常に計測されており、前記一方の待機位置から他方の待機位置への移動中、該計測によりノズル13が後述する仮想線B−Bの上方の位置と、該位置から、繊維方向と直交する方向の単板の長さと等しい距離離れた位置に至ったことが確認されると、制御機構25からの信号により、空気圧縮器を作動又は作動を停止させ、後述する様に、ノズル13の噴出孔からの該接着剤の噴出又は噴出停止を制御する。
【0007】
一方第2コンベア3側には、作動部材の1つであるエアシリンダ17により、可動冷却板19を、実線で示す待機位置と、後述する様に固定冷却板21との間で単板を圧接する位置との間を上下動させる圧締装置を配置する。両冷却板19及び21はクーラー(図示せず)により冷却された水が挿通されており、10℃程度に冷却されている。
ストッパー11の第1コンベア1側上方で所定の位置には、単板を検知するための拡散反射式光センサ(以下光センサという)23を設ける。
ここで、単板の同方向上手側先端が前記妨げる位置にあるストッパー11より下手側に搬送されたこと、単板の同方向上手側先端が前記待機位置にある一対の冷却板19及び21の間の所定位置に搬送されたこと、単板の搬送方向下手側先端が前記待機位置にある一対の冷却板19及び21の間の所定位置に搬送されたことを各々検出する検出手段としては、光センサ23と第1コンベア1及び第2コンベア3に各々備えたサーボモータのタコジェネレータ(図示せず)を用いる。即ち、単板の同方向上手側または下手側の先端が、第1コンベア1上で光センサ23により検出された後、該タコジェネレータにより各コンベアでの単板の搬送量を測定することで検出し、後述する様に検出信号を出す。する。また単板の搬送方向下手側先端が前記妨げる位置にあるストッパー11に当接されたこと、単板の同方向上手側先端が前記妨げる位置にあるストッパー11に当接されたことは、同様に単板の同方向上手側または下手側の先端が、第1コンベア1上で光センサ23により検出された後、該タコジェネレータにより各コンベアでの単板の搬送量を測定し、該搬送量が前記当接されるために計算上必要な量に予め設定した量を加えた量となった時点を、当接されたと推定し後述する様に検出信号を出す。
また前記一対の冷却板19及び21が待機位置から前記冷却圧接する位置に移動した後に所定時間、即ち後述する様に単板を接合するための接着剤が硬化するために十分な時間を経過したことは、制御機構25に設けられ予め設定されているタイマを用いて検出する。
これら光センサ23の検知信号及び各検出手段からの検出信号を制御機構25が受けることで、以下の様に各作動部材に作動信号を出し制御する。
尚、図1において単板は、第2コンベア3の逆走行により一時的に左側に搬送されることがあるが、全体の流れとして単板は左側から右側へと搬送されるので、各単板の右側先端を下手側先端と、また単板の左側先端を上手側先端という。
【0008】
最初に図1に示す様に、ストッパー11が実線で示す待機位置に、可動冷却板19が実線で示す待機位置にある様にエアシリンダ9及びエアシリンダ17を作動させ、またノズル13は空気圧縮器の作動を停止した状態で、単板搬送方向と直交する方向で搬送方向下手側を見た時の左側、即ち図2では上方の待機位置にあり、更には第1コンベア1及び第2コンベア3を各々右側へ正走行させて初期状態を設定する。
前記初期状態において、図3に示す様に、繊維方向の両端部を切欠いて互いに平行な傾斜面27及び29が形成された単板31を、図1に示す様に、繊維方向が第1コンベア1の搬送方向と一致し、また繊維方向と直交する方向の一方の端縁例えば図2では上方の端縁31aが、第1コンベア1に設定した所定のライン例えば二点鎖線B−Bで示す仮想線と一致する様に、第1コンベア1上に載せる。
尚、後述する様に単板31に続いて順次単板33、35・・を第1コンベア1上に載せる場合も、同様の状態とする。
第1コンベア1上の単板31は図1で右方向に搬送され、単板31が光センサ23の下方を通過し、単板31の上手側先端31cが光センサ23により検知され該信号が制御機構25に伝達されると制御信号が出され、サーボモータ5のタコジェネレータによる搬送量の測定を開始する。該上手側先端31cが検知された位置から単板31が第2コンベア3上ヘと移動し、図4に示す様に、単板31の上手側先端31cがストッパー11の下方から右方向へ予め設定された量搬送されたことがサーボモータ5のタコジェネレータからの信号で測定されると、制御機構25からの信号でサーボモータ7が作動を停止し第2コンベア3が停止する。
【0009】
次いで制御機構25からの作動信号によりエアシリンダ9が作動し、ストッパー11が、図5に示す様に、第1コンベア1および第2コンベア3による単板の搬送を妨げる位置に下降し待機するために十分な時間が経過した後、制御機構25から更に作動信号が出され、サーボモータ7を作動させ第2コンベア3を、逆走行即ち図5で左側へ走行させる。
そこで単板31は上手側先端31cがストッパー11に当接され、該当接された状態で更に第2コンベア3が前述の様に予め設定した量左側へ走行することで、仮にストッパー11に対し単板31が傾斜していても修正され、最終的に単板31の上手側先端31c全体がストッパー11に当接される。
【0010】
次いで第2コンベア3が前記予め設定した量走行したことが制御機構25により検出されると、制御機構25は制御信号を出しサーボモータ7を制御し、第2コンベア3の該逆走行を停止させる。このことにより、第2コンベア3に対する単板31の上手側先端31cの位置が決定される。
更に該逆走行の停止に続いて制御機構25からの作動信号で第2コンベア3を、図6に矢印で示す様に、正走行させる。
そこで単板31が搬送され、単板31の上手側先端31cが、ストッパー11に当接された位置から両冷却板19及び21の間の予め設定された位置に至ったことがサーボモータ7のタコジェネレータにより検出されると、制御機構25からの作動信号でサーボモータ7が作動を停止して第2コンベア3が停止し、単板31は図7で示す位置で停止し待機する。
【0011】
一方前記の様に、単板31が第2コンベア3上へ搬送されてからストッパー11が単板の搬送を妨げる位置に下降待機した後、第1コンベア1上には、単板31と同様に端部に傾斜面32及び34が形成された単板33を、図5に示す様に、載せる。そこで単板33は第1コンベア1で搬送され、光センサ23により単板33の下手側先端33bの通過が検出され、図6に示す様に、単板33の下手側先端33bがストッパー11に当接されるが、第1コンベア1は前記予め設定した量走行し続けた後に、制御機構25からの信号で停止する。そのため同様にストッパー11に対し単板33が傾斜していても修正され、最終的に単板33の下手側先端33b全体がストッパー11に当接される。
このことにより、第1コンベア1に対する単板33の下手側先端33bの位置が決定される。
【0012】
上記の様に第1コンベア1の停止により単板33が前記位置で停止した条件、及び前述の様に、単板31の上手側先端31cを両冷却板19及び21の間の予め設定された位置に搬送し停止待機させた条件、の両方が満たされたことが制御機構25で確認されると、制御機構25からの制御信号で、エアシリンダ9を上昇作動させストッパー11を、図7に示す様に、待機位置に移動させる。
次いで制御機構25からの制御信号で往復移動部材(図示せず)を作動させ、図2に示す位置に待機していたノズル13をストッパー11と平行に図8の矢印で示す方向に水平移動させる。ノズル13の移動量は前記の様に往復移動部材に設けたロータリエンコーダにより常に計測されており、該計測によりノズル13が仮想線B−Bの上方即ち単板33の端縁33aの上方に至ったことが制御機構25で確認されると、制御機構25から信号が出されて空気圧縮器を作動させ、タンク内の接着剤を加圧し続ける。そこでノズル13から接着剤13aが噴出され、単板33の傾斜面32に図8に示す様に接着剤13aが筋状に付着させられる。
また接着剤13aを噴出し続けているノズル13が、単板33の端縁33dの上方に至ったことが往復移動部材に設けたロータリエンコーダからの信号により制御機構25で検出されると、制御機構25から信号が出されて空気圧縮器の作動を停止させ、接着剤13aの噴出を中止する。その結果、図9に示す様に単板33の傾斜面32全面に接着剤13aが筋状に付着させられる。
ノズル13は更に移動を続け、図9で示す他方の待機位置に至ったことが、同じくロータリエンコーダからの信号により制御機構25で検出されると、制御機構25から信号が出されて往復移動部材の作動を停止させ、ノズル13の移動を停止し待機させる。
【0013】
上記動作終了後に、制御機構25から信号が出されて第1コンベア1を正走行させ、サーボモータ5のタコジェネレータにより、単板33の下手側先端33bが予め設定された距離、即ち図10に示す様に、第2コンベア3上で停止している単板31の上手側の傾斜面29に、単板33の下手側の接着剤13aが付着した傾斜面32が接触する位置まで移動したことが検出されると、該検出信号が伝達された制御機構25からサーボモータ5に作動信号が送られ、第1コンベア1を停止させる。
次いで制御機構25はエアシリンダ17を上昇作動させる信号を出し、冷却板19を図11に示す様に上昇させ、単板31の上手側端部と単板33の下手側端部とを冷却板21との間で挟持し該両端部を表裏面から冷却する。
この冷却を開始してから接着剤13aを硬化させるための予め設定された時間を経過したことが制御機構25のタイマにより検出されると、制御機構25からの作動信号が出され、図12に示す様に、エアシリンダ17を下降作動させ冷却板19を待機位置ヘ移動待機させる。この時点で傾斜面29と傾斜面32とが接着され、単板31と単板33とが接合され一体となっている。(以下接合され一体となった単板31と単板33とを接合単板Pという)
【0014】
次いで制御機構25からの作動信号でサーボモータ5及び7を作動させ、第1コンベア及び第2コンベア3を図13に示す様に同時に正走行させる。
そこで接合単板Pは、第1コンベア1及び第2コンベア3で搬送され、接合単板Pの上手側先端33cの通過が光センサ23により検知される。そこで前記単板31の上手側先端31cが検知された場合と同様に、接合単板Pの上手側先端33cが、図14に示す様に、ストッパー11の下方から右方向へ予め設定された距離至ったことがサーボモータ5のタコジェネレータにより検出されると、サーボモータ7が作動を停止し第2コンベア3が停止する。
次いで制御機構25からの作動信号により、エアシリンダ9が下降作動しストッパー11が、図15に示す様に、単板の搬送を妨げる位置に下降待機するために十分な時間が経過した後、制御機構25から更に作動信号が出され、サーボモータ7を作動させ第2コンベア3を、図15に矢印で示す様に、逆走行即ち左側へ走行させる。
【0015】
そこで接合単板Pは上手側先端33cがストッパー11に当接され、単板31の場合と同様に、該当接された状態で第2コンベア3が左側へ走行することで、仮にストッパー11に対し接合単板Pが傾斜していても修正され、最終的に接合単板Pの上手側先端33c全体がストッパー11に当接される。
次いで第2コンベア3が予め設定された量走行すると、制御機構25は制御信号を出しサーボモータ7を制御し、第2コンベア3の該逆走行を停止させる。このことにより、第2コンベア3に対する接合単板Pの上手側先端33cの位置が決定される。
更に制御機構25からの信号により第2コンベア3の逆走行の停止に続いて、サーボモータ7を作動させ、第2コンベア3を図16に示す様に正走行させる。
そこで接合単板Pが搬送され、単板31の場合と同様に、接合単板Pの上手側先端33cがストッパー11に当接された位置から両冷却板19及び21の間の予め設定された位置に至ったことがサーボモータ7のタコジェネレータにより検出されると、制御機構25からの信号によりサーボモータ7が作動を停止して第2コンベア3が停止し、接合単板Pは図17で示す位置で停止し待機する。
【0016】
一方前記の様に、接合単板Pが第2コンベア3上へ搬送されてからストッパー11が単板の搬送を妨げる位置に下降待機した後、第1コンベア1上には、単板31、33と同様に傾斜面36及び37が形成された単板35を、図15に示す様に、載せる。
そこで単板35は第1コンベア1で搬送され、以下、前記単板33を第1コンベア1に載せた場合と同様に、図16に示す様に単板35の下手側先端35b全体のストッパー11へ当接され、次いで第1コンベア1の停止の条件及び接合単板Pの上手側先端33cの両冷却板19及び21間の予め設定された位置に停止待機した条件で、図17に示す様にストッパー11が上昇し待機する。
次いで制御機構25からの信号により往復移動部材(図示せず)を前記と逆方向に作動させ、図9に示す位置に待機していたノズル13をストッパー11と平行に図8の矢印と逆方向に水平移動させる。ノズル13の移動量は同様に往復移動部材に設けたロータリエンコーダにより常に計測されており、該計測によりノズル13が仮想線B−Bから所定距離離れた単板35の端縁35dの上方に至ったことがロータリエンコーダにより検出されると、制御機構25から信号が出されて空気圧縮器を作動させ、ノズル13から接着剤13aが噴出される。この状態でノズル13が水平移動することにより、図18に示す様に単板35の傾斜面36に接着剤13aが筋状に付着させられる。
【0017】
水平移動するノズル13が仮想線B−Bの上方即ち単板35の端縁35aの上方に至ると制御機構25から信号が出されて空気圧縮器の作動を停止させ、接着剤13aの噴出を中止する。その結果、図9に示した場合と同様に単板35の傾斜面36全体に接着剤13aが筋状に付着させられる
ノズル13は更に移動を続け、図2で示した当初の待機位置に至ったことが、同じくロータリエンコーダにより計測されると、制御機構25から信号が出されて往復移動部材の作動を停止させ、ノズル13の移動を停止し待機させる。
次いで、図9で単板33の傾斜面32に接着剤13aを付着させた後の作動と同様に、第1コンベア1の正走行により、単板35を、第2コンベア3上で停止している接合単板Pの上手側の傾斜面34に、単板35の下手側の接着剤13aが付着した傾斜面36が接触する位置まで移動させること、第1コンベア1を停止させること、エアシリンダ17の上昇作動で単板33の上手側端部と単板35の下手側端部とを冷却板19、21との間で圧接すること(図19参照)、予め設定された時間の経過後にエアシリンダ17を下降作動させ冷却板19を待機位置ヘ移動待機させること、を順次行い、接合単板Pと単板35とが接合され一体となる。(以下、接合され一体となった接合単板Pと単板35とを接合単板Sという)
【0018】
次いで、図13、図14、図15、図16、図17の順で第1コンベア1等の各部材の作動により接合単板Pの上手側先端33cを両冷却板19及び21の間の予め設定された位置に移動させた場合と同様の作動により、接合単板Sを移動させ、接合単板Sの上手側先端35cを、図20に示す様に両冷却板19及び21の間の予め設定された位置に移動させる。一方第1コンベア1に載せた後続単板39を、単板33を図5、図6と移動させた後にノズル13の図8の矢印方向への平行移動により接着剤13aを下手側傾斜面32に付着させたと同様の作動により、図20に示す様に移動させ且つ後続単板39の下手側傾斜面41に接着剤13aを付着させる。次いで停止している単板31に対し単板33を図10に示す様に移動させたと同様の作動で、接合単板Sに対し後続単板39を移動させ、冷却板19、21との間での圧接により接合単板Sと後続単板39とを接合する。
接合後の単板Sと単板39とは、同様に上手側先端39cを両冷却板19及び21の間の予め設定された位置に移動させ、更に後続の単板(図示せず)の搬送とノズル13の図18の矢印方向への移動による該後続の単板の下手側傾斜面への接着剤の付着、該後続の単板の移動、冷却板19、21との間での圧接で接合し、以後これら動作の繰り返しにより順次単板を接合するのである。
また接合された単板の長さが所定長さ以上となると、第1コンベア1及び第2コンベアを停止した状態で鋸等の切断装置により、所定長さに切断するのである。
【0019】
以上の様に発明の実施の形態においては、単板33、35、39・・のスカーフカット部の傾斜面32、36、41に対し、厚薄方向の全幅に対応して接着剤を噴出する噴出孔を備えたノズル13を、該傾斜面に相対した状態で単板33、35、39・・の該先端33b、35b、39b・・と平行に、該先端と直交する一方の端縁から他方の端縁に至るまで移動させ、傾斜面に接着剤13aを塗布するのである。
そのため傾斜面の厚薄方向には希望する範囲で接着剤を塗布することができ、傾斜面の傾斜面に続く単板表面に多量に塗布されることがなく、接合後単板を順次堆積しても接合単板同士が付着することがない。
またノズル13が移動し例えば単板33の場合、端縁33aの上方に到達すると噴出孔からの接着剤の噴出を開始し、該状態で移動するノズル13が他方の端縁33dの上方に到達すると接着剤の噴出を中止するが、この場合噴出開始時及び噴出中止時の精密なタイミングを制御をする必要がない。即ち、ノズル13が端縁33aの上方に到達する前に予め接着剤の噴出を開始し、また移動するノズル13が他方の端縁33dの上方を通過してしまってから接着剤の噴出を中止するようにしても、単板33の傾斜面32に塗布されなかった接着剤は、単板33の他の箇所には付着せず、接合された単板を順次堆積しても接合単板同士が付着することがない。
更には塗布される接着剤の量はノズルの噴出孔から噴出される単位時間あたりの接着剤の量とノズルが移動する早さによって決定され、希望する量の接着剤を塗布することができる。更には、スカーフカット部の傾斜面に細かな凹凸があっても、全体にほぼ均一に接着剤を塗布することができる。
【0020】
次に発明の実施の形態の変更例を説明する。
1、単板等板状体の切欠部の該傾斜した又は平行な面で先端に向かう方向の長さは、例えば前記発明の実施の形態でのスカーフカット部の場合、単板表裏面に対する傾斜角度が同じであっても、単板の厚さが変わると変わる。そのため切欠部の傾斜方向の長さが変わった場合、該変化に対応して、噴出孔が設けられたノズルと交換することが必要となるが、以下の様にするとノズルを交換することなく簡単な構成で実施できる。
即ち例えば図21に示す様に、単板51の傾斜面の傾斜方向の長さL1に対応し二点鎖線鎖線で示す幅で噴出孔55(便宜上実線で示す)を備えたノズル13を、単板51先端51cと平行に設け矢印の方向に移動させて接着剤を塗布する。次に図22に示す様に、傾斜面の傾斜方向の長さがL1より小であるL2である単板53に接着剤を塗布する場合、二点鎖線で示すL2の幅の内側に噴出孔55が位置する様にノズル13を図21の場合に対し同一水平面において回動させ、該状態で単板53の先端53cと平行に移動させるのである。
この様にノズル13を傾斜面の傾斜方向の長さに応じて上記の様に回動させることで、噴出孔の配置の異なるノズルを準備する必要がない。
2、塗布する接着剤としては、前記の熱可塑型接着剤の他、熱硬化型接着剤であっても良く、この場合は前記冷却板19及び21を一対の熱板とすればよい。
3、発明の実施の形態では、単板を繊維方向に接合する場合を説明したが、単板を繊維方向と直交する方向に接合する所謂横矧を行う場合に同様の方法で接着剤を塗布しても良い。
4、単板等板状体の切欠部の形状は、前記発明の実施の形態で示した様に連続する傾斜面の他に、以下の様に形成しても良い。即ち図23に示す様に段差部57を傾斜面59の途中に有する板状体61としても良く、この板状体61を矢印方向に移動させて、段差部57と傾斜面59とに合致する形状の切欠部が形成された板状体63と接合するのである。
また図24に示す様に、板状体67、71の端部をほぼ等しい深さで切欠き、平坦な面65と69とを合わせ両板状体67、71を接合しても良い。
更には図25に示す様に、一方の板状体75には凹状の円弧となる面73を、他方の板状体79には凸状で面73と合致する面77を各々形成し、面73と77とを合わせ両板状体75、79を接合しても良い。
要は、該切欠部の形状は、板状体が接合された時、互いに切欠部を埋める形状であればよい。
【0021】
5、板状体としては、単板の他、合板、LVL (Laminated Veneer Lumber)等の積層材、MDF(Medium Density Fiberbord)等の木質板材であっても良い。
6、発明の実施の形態では、単板の搬送方向に対し、ノズル13を該搬送方向と直交する方向に移動させて接着剤を塗布したが、以下の様に塗布しても良い。
即ち、要部の平面説明図である図26で二点鎖線で示す位置にある板状体81を、矢印Xの方向に搬送し実線で示す位置に待機させた後、ノズル13を矢印Zの方向に移動させて接着剤を塗布しても良い。塗布後、矢印Yの方向に板状体81を移動させて、前記発明の実施の形態と同様の作動で接合を行うのである。
一方、ノズル13を固定した状態で、板状体81を二点鎖線で示す位置から実線で示す位置を経て更に矢印Xの方向に連続的に搬送し、板状体81の端縁81aがノズル13の下方に到達した時に噴出孔から接着剤の噴出を開始し、板状体81の端縁81dがノズル13の下方に到達した時に噴出孔から接着剤の噴出を中止する様にしても良い。
7、板状体の表裏面に対し傾斜した又は平行な面に塗布された接着剤は、接合した後に順次堆積しても接合単板同士が付着する等の問題がなければ、該傾斜した又は平行な面に続く板状体の表面に付着してもよい。
【0022】
【発明の効果】
以上の様に本発明の塗布方法では、該傾斜した又は平行な面の切欠部の先端に向かう方向で接着剤が塗布される範囲は、ノズルの厚薄方向に設けられた噴出孔の位置によって決定され、また塗布される接着剤の量はノズルの噴出孔から噴出される単位時間あたりの接着剤の量とノズルが移動する早さによって決定される。
それ故、切欠部の厚薄方向には希望する範囲で接着剤を塗布することができ、該先端に向かう方向で切欠部から大きくはみ出して切欠部の傾斜面に続く板状体表面に多量に塗布されず、接合後板状体を順次堆積しても板状体同士が付着することがない。
また切欠部の傾斜面に細かな凹凸があっても、全体にほぼ均一に接着剤を塗布することができる。
【図面の簡単な説明】
【図1】発明の実施の形態の装置の側面説明図である。
【図2】図1の一点鎖線A−Aより矢印方向を見た平面説明図である。
【図3】単板の斜視図である。
【図4】作動説明図である。
【図5】作動説明図である。
【図6】作動説明図である。
【図7】作動説明図である。
【図8】作動説明図である。
【図9】作動説明図である。
【図10】作動説明図である。
【図11】作動説明図である。
【図12】作動説明図である。
【図13】作動説明図である。
【図14】作動説明図である。
【図15】作動説明図である。
【図16】作動説明図である。
【図17】作動説明図である。
【図18】作動説明図である。
【図19】作動説明図である。
【図20】作動説明図である。
【図21】変更例の平面説明図である。
【図22】変更例の平面説明図である。
【図23】変更例の側面説明図である。
【図24】変更例の側面説明図である。
【図25】変更例の側面説明図である。
【図26】変更例の作動説明図である。
【図27】従来方法の説明図である。
【図28】従来方法の説明図である。
【符号の説明】
1・・第1コンベア
3・・第2コンベア
11・・ストッパー
13・・ノズル
13a・・接着剤
19・・可動冷却板
21・・固定冷却板
23・・光センサ
25・・制御機構
27、32、36、41・・傾斜面
31、33、35、39・・単板
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for applying an adhesive to a notch formed at an end of a plate-like body when a plate-like body such as a veneer single plate (hereinafter referred to as a single plate) is joined.
By forming this notch, the plate has an inclined or parallel surface at the end with respect to the front and back surfaces of the plate.
[0002]
[Prior art]
Conventionally, for example, in bonding single plates, when an adhesive is applied to a scarf cut portion of a single plate, it has been performed as follows.
That is, for example, as shown in FIG. 27, the adhesive 103 is preliminarily adhered to the inclined surface 101 in a direction perpendicular to the moving direction of the veneer 107 indicated by an arrow at an appropriate interval, and the scarf cut portion 105 is attached. A method is used in which the single plate 107 is moved in the direction of the arrow and the adhesive 103 is scooped by the scarf cut portion 105. In this way, the scarf cut portion 105 to which the adhesive of the single plate 107 is attached and the scarf cut portion to which the adhesive is not attached to another single plate, not shown, are overlapped and joined.
Also, as shown in FIG. 28, an adhesive is attached to the peripheral surfaces of the rolls 109 and 111 that rotate in directions opposite to each other in a close state, and the tip of the single plate 107 is raised as indicated by an arrow to cut the scarf cut portion. A method of attaching an adhesive to 105 has been implemented.
[0003]
[Problems to be Solved by the Invention]
However, in the former, by overlapping the two scarf cut portions as described above, the granular adhesive adhered to the scarf cut portion 105 is spread over the entire scarf cut portion, but the surface of both scarf cut portions is fine. Due to unevenness and the like, it is difficult for the adhesive to spread evenly over the both surfaces, and it is difficult to obtain a sufficient bonding force.
In this case, increasing the number of granular adhesives and the amount of adhesive per grain can provide a sufficient bonding force, but the cost of the adhesive is increased, and the spread adhesive is applied to the scarf cut portion. A large amount is also applied to the surface of the single plate following the inclined surface. Therefore, when the single plates are sequentially deposited after bonding, the bonded single plates adhere to each other, and it becomes difficult to take out the deposited single plates one by one.
The latter method also has the same problem because it spreads the adhesive attached to the scarf cut portion.
[0004]
[Means for Solving the Problems]
In order to solve these problems, the present invention applies an adhesive to surfaces inclined or parallel to the front and back surfaces of the plate-like body obtained by forming a notch at the end of the plate-like body. A nozzle having an ejection hole for ejecting an adhesive corresponding to the entire width in the direction toward the tip of the notch is orthogonal to the tip of the notch of the plate-like body in a state facing the inclined or parallel surface. It moves in parallel with the tip from one end edge to the other end edge.
In this case, the nozzle may be rotatably provided on the same horizontal plane where the nozzle is located.
Also, when applying an adhesive to a surface that is inclined or parallel to the front and back surfaces of the plate-like body obtained by forming the notch at the end of the plate-like body, the entire width in the direction toward the tip of the notch portion Correspondingly, a nozzle having an ejection hole for ejecting the adhesive is rotatably provided on the same horizontal plane where the nozzle is located, and a plate-like body is provided at the tip in a state of being opposed to the inclined or parallel surface. You may move to the direction orthogonal to the direction to go.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
As shown in FIG. 1 which is a side view of the apparatus and FIG. 2 which is a plan view of the apparatus as viewed in the direction of the arrow from the one-dot chain line AA in FIG. 1 conveyor 1 and the 2nd conveyor 3 which can carry out forward running, reverse running, and stop are arranged in a line.
Here, forward traveling means a state in which the conveyor travels in the right direction in order to convey the single plate in the right direction in FIG. 1, and reverse traveling means that the conveyor in the left direction in order to convey the single plate in the left direction. It means the state of running.
For example, servo motors 5 and 7 are provided as operating members on the conveyors 1 and 3, respectively, and the running and stopping are controlled by the control mechanism 25 as will be described later, and when the first and second conveyors run forward, they are equal to each other. It is fast.
The following members are provided between the first conveyor 1 and the second conveyor 3.
That is, on the first conveyor 1 side, an air cylinder 9 that is one of the operating members moves up and down between a standby position indicated by a solid line and a lowered position that prevents conveyance of a single plate, which will be described later, A stopper 11 having a length capable of contacting the entire width in the direction orthogonal to the transport direction is provided.
[0006]
In the vertical direction, it is at the height shown in FIG. 1 and is usually two standby positions that are separated from the first conveyor 1 by a predetermined distance and close to the stopper 11 on both sides in the direction orthogonal to the traveling direction of the first conveyor 1. And a stopper 11 in a direction perpendicular to the traveling direction of the first conveyor 1 by a reciprocating member (not shown) by a control signal from the control mechanism 25 as will be described later. A nozzle 13 that can be horizontally reciprocated and stopped in parallel is provided.
The nozzle 13 has an ejection hole (not shown) for ejecting a large number of adhesives on the lower surface side in a direction (hereinafter referred to as “thin”) from a thick part of a scarf cut part of a single plate, which will be described later, to a thin tip. The nozzle 13 is connected to a hose 15 for supplying the adhesive from a tank (not shown) containing a heated and molten thermoplastic adhesive. ing.
The tank is provided with an air compressor (not shown), and the air compressor is operated to pressurize the adhesive so that the adhesive is ejected from the ejection holes of the nozzle 13 or the air compressor is activated. It is possible to stop the ejection of the adhesive by stopping the operation.
The amount of movement when the nozzle 13 moves horizontally is always measured by a rotary encoder provided on a reciprocating member (not shown), and during the movement from the one standby position to the other standby position, the nozzle 13 is measured by the measurement. Is confirmed to have reached a position above a virtual line BB, which will be described later, and a position away from the position by a distance equal to the length of the veneer in the direction orthogonal to the fiber direction, from the control mechanism 25. The air compressor is activated or deactivated by the signal, and the ejection of the adhesive from the ejection hole of the nozzle 13 or the ejection stop is controlled as will be described later.
[0007]
On the other hand, on the side of the second conveyor 3, a movable cooling plate 19 is press-contacted between a standby position indicated by a solid line and a fixed cooling plate 21 as will be described later by an air cylinder 17 that is one of the operating members. A pressing device that moves up and down between the positions is arranged. Both cooling plates 19 and 21 are inserted with water cooled by a cooler (not shown) and are cooled to about 10 ° C.
A diffuse reflection type optical sensor (hereinafter referred to as an optical sensor) 23 for detecting a single plate is provided at a predetermined position above the first conveyor 1 side of the stopper 11.
Here, the upper end in the same direction of the single plate is transported to the lower side from the stopper 11 in the blocking position, and the pair of cooling plates 19 and 21 in which the upper end in the same direction of the single plate is in the standby position. As a detection means for detecting each of the transported to a predetermined position between the pair of cooling plates 19 and 21 at the lower end in the transport direction of the single plate, respectively. A servo motor tachometer (not shown) provided in each of the optical sensor 23 and the first conveyor 1 and the second conveyor 3 is used. In other words, after the leading edge of the veneer in the same direction on the upper side or lower side is detected by the optical sensor 23 on the first conveyor 1, the tachometer is used to measure the conveyance amount of the veneer on each conveyor. Then, a detection signal is output as will be described later. To do. Similarly, the lower end of the veneer in the conveying direction is in contact with the stopper 11 in the blocking position, and the upper end of the same plate in the same direction is in contact with the stopper 11 in the blocking position. After the upper end or the lower end in the same direction of the single plate is detected by the optical sensor 23 on the first conveyor 1, the transport amount of the single plate on each conveyor is measured by the tachometer, and the transport amount is It is estimated that the contact is made when a predetermined amount is added to the amount required for calculation for contact, and a detection signal is output as described later.
Further, after the pair of cooling plates 19 and 21 has moved from the standby position to the position where the cooling pressure contact is made, a predetermined time has passed, that is, a sufficient time has passed for the adhesive for bonding the single plates to be cured as will be described later. This is detected by using a preset timer provided in the control mechanism 25.
When the control mechanism 25 receives the detection signal of the optical sensor 23 and the detection signal from each detection means, the operation signal is output to each operation member and controlled as follows.
In FIG. 1, the veneer may be temporarily transported to the left side by reverse running of the second conveyor 3, but the veneer is conveyed from the left side to the right side as a whole flow. The right end of the plate is referred to as the lower end, and the left end of the single plate is referred to as the upper end.
[0008]
First, as shown in FIG. 1, the air cylinder 9 and the air cylinder 17 are operated so that the stopper 11 is in a standby position indicated by a solid line and the movable cooling plate 19 is in a standby position indicated by a solid line, and the nozzle 13 is compressed by air. When the lower side of the conveyance direction is viewed in the direction orthogonal to the veneer conveyance direction in a state where the operation of the machine is stopped, it is in the standby position on the left side, that is, in FIG. 2, and further, the first conveyor 1 and the second conveyor 3 is moved forward to the right to set the initial state.
In the initial state, as shown in FIG. 3, the single plate 31 formed with the inclined surfaces 27 and 29 parallel to each other by notching both ends in the fiber direction, the fiber direction is the first conveyor as shown in FIG. One end edge in a direction that coincides with the conveyance direction 1 and orthogonal to the fiber direction, for example, the upper end edge 31a in FIG. 2 is indicated by a predetermined line set on the first conveyor 1, for example, a two-dot chain line BB It is placed on the first conveyor 1 so as to coincide with the virtual line.
As will be described later, when the single plates 33, 35,... Are sequentially placed on the first conveyor 1 after the single plate 31, the same state is assumed.
The single plate 31 on the first conveyor 1 is conveyed rightward in FIG. 1, the single plate 31 passes below the optical sensor 23, the upper end 31c of the single plate 31 is detected by the optical sensor 23, and the signal is When transmitted to the control mechanism 25, a control signal is issued, and measurement of the transport amount by the tacho generator of the servo motor 5 is started. The veneer 31 moves from the position where the upper end 31c is detected to the upper side of the second conveyor 3, and the upper end 31c of the upper side of the veneer 31 is moved in advance in the right direction from below the stopper 11 as shown in FIG. When it is measured by the signal from the tachometer generator of the servo motor 5 that the set amount has been conveyed, the servo motor 7 stops operating by the signal from the control mechanism 25 and the second conveyor 3 stops.
[0009]
Next, the air cylinder 9 is actuated by an actuation signal from the control mechanism 25, and the stopper 11 is lowered to a position where it interferes with the conveyance of the single plate by the first conveyor 1 and the second conveyor 3, as shown in FIG. After a sufficient time has elapsed, an operation signal is further output from the control mechanism 25, and the servo motor 7 is operated to cause the second conveyor 3 to run backward, that is, to the left in FIG.
Therefore, the upper end 31c of the upper side of the veneer 31 is in contact with the stopper 11, and the second conveyor 3 further travels to the left by a predetermined amount as described above, so that the single plate 31 is temporarily connected to the stopper 11. Even if the plate 31 is inclined, it is corrected, and finally the entire upper end 31 c of the single plate 31 is brought into contact with the stopper 11.
[0010]
Next, when it is detected by the control mechanism 25 that the second conveyor 3 has traveled the preset amount, the control mechanism 25 outputs a control signal to control the servo motor 7 and stop the reverse travel of the second conveyor 3. . As a result, the position of the upper end 31c of the veneer 31 relative to the second conveyor 3 is determined.
Further, following the stop of the reverse running, the second conveyor 3 is moved forward as indicated by an arrow in FIG. 6 by an operation signal from the control mechanism 25.
Then, the veneer 31 is transported and the upper end 31 c of the upper verge of the veneer 31 reaches the preset position between the cooling plates 19 and 21 from the position where it abuts against the stopper 11. When detected by the tachometer, the servo motor 7 stops operating in response to an operation signal from the control mechanism 25, the second conveyor 3 stops, and the single plate 31 stops and stands by at the position shown in FIG.
[0011]
On the other hand, as described above, after the veneer 31 is conveyed onto the second conveyor 3, the stopper 11 waits for the position where the stopper 11 prevents the conveyance of the veneer, and then, on the first conveyor 1, similarly to the veneer 31. The single plate 33 having the inclined surfaces 32 and 34 formed at the ends is placed as shown in FIG. Therefore, the veneer 33 is conveyed by the first conveyor 1 and the passage of the lower end 33b of the veneer 33 is detected by the optical sensor 23, and the lower end 33b of the veneer 33 is moved to the stopper 11 as shown in FIG. The first conveyor 1 stops traveling by a signal from the control mechanism 25 after continuing to travel for the preset amount. Therefore, similarly, even if the single plate 33 is inclined with respect to the stopper 11, it is corrected, and finally the entire lower end 33 b of the single plate 33 is brought into contact with the stopper 11.
Thus, the position of the lower end 33b of the veneer 33 relative to the first conveyor 1 is determined.
[0012]
As described above, the condition in which the single plate 33 is stopped at the position by the stop of the first conveyor 1 and the upper end 31c of the single plate 31 between the cooling plates 19 and 21 are set in advance as described above. When it is confirmed by the control mechanism 25 that both of the conditions of conveying to the position and stopping and waiting are satisfied, the air cylinder 9 is raised by the control signal from the control mechanism 25, and the stopper 11 is changed to FIG. Move to the standby position as shown.
Next, a reciprocating member (not shown) is actuated by a control signal from the control mechanism 25, and the nozzle 13 waiting at the position shown in FIG. 2 is moved horizontally in the direction indicated by the arrow in FIG. . The amount of movement of the nozzle 13 is always measured by the rotary encoder provided on the reciprocating member as described above, and the nozzle 13 reaches above the imaginary line BB, that is, above the edge 33a of the single plate 33 by the measurement. When it is confirmed by the control mechanism 25, a signal is output from the control mechanism 25 to operate the air compressor and continue to pressurize the adhesive in the tank. Therefore, the adhesive 13a is ejected from the nozzle 13, and the adhesive 13a is adhered to the inclined surface 32 of the single plate 33 in a streak shape as shown in FIG.
When the control mechanism 25 detects that the nozzle 13 that continues to eject the adhesive 13a reaches the upper edge 33d of the single plate 33 by a signal from the rotary encoder provided on the reciprocating member, the control mechanism 25 A signal is output from the mechanism 25 to stop the operation of the air compressor, and the ejection of the adhesive 13a is stopped. As a result, as shown in FIG. 9, the adhesive 13 a is adhered in a streak pattern on the entire inclined surface 32 of the single plate 33.
When the control mechanism 25 detects that the nozzle 13 continues to move and reaches the other standby position shown in FIG. 9 by a signal from the rotary encoder, a signal is output from the control mechanism 25 and the reciprocating member. Is stopped, and the movement of the nozzle 13 is stopped and put on standby.
[0013]
After the above operation is completed, a signal is output from the control mechanism 25 to cause the first conveyor 1 to run forward, and the lower end 33b of the single plate 33 is set to a predetermined distance by the tacho generator of the servo motor 5, that is, in FIG. As shown in the figure, the upper side inclined surface 29 of the single plate 31 stopped on the second conveyor 3 has moved to the position where the inclined surface 32 to which the lower side adhesive 13a is attached contacts the single plate 33. Is detected, an operation signal is sent to the servo motor 5 from the control mechanism 25 to which the detection signal is transmitted, and the first conveyor 1 is stopped.
Next, the control mechanism 25 issues a signal for raising the air cylinder 17 and raises the cooling plate 19 as shown in FIG. 11, and the upper end of the single plate 31 and the lower end of the single plate 33 are connected to the cooling plate. The both ends are cooled from the front and back surfaces.
When it is detected by the timer of the control mechanism 25 that a preset time for curing the adhesive 13a has elapsed since the start of the cooling, an operation signal is output from the control mechanism 25, as shown in FIG. As shown, the air cylinder 17 is lowered to move the cooling plate 19 to the standby position. At this time, the inclined surface 29 and the inclined surface 32 are bonded, and the single plate 31 and the single plate 33 are joined and integrated. (Hereinafter, the united single plate 31 and the single plate 33 are referred to as a bonded single plate P)
[0014]
Next, the servo motors 5 and 7 are actuated by an actuation signal from the control mechanism 25, and the first conveyor and the second conveyor 3 are simultaneously forwardly moved as shown in FIG.
Therefore, the bonded single plate P is conveyed by the first conveyor 1 and the second conveyor 3, and the passage of the upper end 33 c of the bonded single plate P is detected by the optical sensor 23. Therefore, similarly to the case where the upper end 31c of the single plate 31 is detected, the upper end 33c of the bonded single plate P is set at a predetermined distance from the lower side of the stopper 11 to the right as shown in FIG. When it is detected by the tacho generator of the servo motor 5, the servo motor 7 stops its operation and the second conveyor 3 stops.
Next, the operation signal from the control mechanism 25 causes the air cylinder 9 to descend, and after a sufficient time has elapsed for the stopper 11 to wait to descend to a position that prevents the conveyance of the single plate, as shown in FIG. An operation signal is further output from the mechanism 25, and the servo motor 7 is operated to cause the second conveyor 3 to run backward, that is, to the left, as indicated by an arrow in FIG.
[0015]
Therefore, the upper end 33c of the joint veneer P is brought into contact with the stopper 11 and, as in the case of the veneer 31, the second conveyor 3 travels to the left side in the state of corresponding contact, so that Even if the bonded single plate P is inclined, it is corrected, and finally the entire upper end 33c of the bonded single plate P is brought into contact with the stopper 11.
Next, when the second conveyor 3 travels for a preset amount, the control mechanism 25 outputs a control signal to control the servo motor 7 to stop the reverse travel of the second conveyor 3. Thus, the position of the upper end 33c of the joining veneer P with respect to the second conveyor 3 is determined.
Further, following the stop of the reverse running of the second conveyor 3 by a signal from the control mechanism 25, the servo motor 7 is operated to cause the second conveyor 3 to run forward as shown in FIG.
Therefore, the bonded single plate P is transported, and in the same manner as the single plate 31, the position between the cooling plates 19 and 21 is set in advance from the position where the upper end 33 c of the bonded single plate P is in contact with the stopper 11. When the tacho generator of the servo motor 7 detects that the position has been reached, the servo motor 7 stops operating due to a signal from the control mechanism 25, the second conveyor 3 stops, and the bonded single plate P is shown in FIG. Stop and wait at the indicated position.
[0016]
On the other hand, after the joining veneer P is conveyed onto the second conveyor 3 as described above, the stopper 11 waits at a position where it prevents the conveyance of the veneer, and then the veneer 31, 33 is placed on the first conveyor 1. Similarly, the single plate 35 on which the inclined surfaces 36 and 37 are formed is placed as shown in FIG.
Therefore, the veneer 35 is conveyed by the first conveyor 1, and hereinafter, as in the case where the veneer 33 is placed on the first conveyor 1, as shown in FIG. FIG. 17 shows a condition for stopping the first conveyor 1 and a condition for stopping and waiting at a preset position between the cooling plates 19 and 21 of the upper end 33c of the joining single plate P. Stopper 11 rises and waits.
Next, a reciprocating member (not shown) is operated in the opposite direction by a signal from the control mechanism 25, and the nozzle 13 waiting at the position shown in FIG. 9 is parallel to the stopper 11 and in the opposite direction to the arrow in FIG. Move horizontally. Similarly, the amount of movement of the nozzle 13 is always measured by a rotary encoder provided on the reciprocating member, and by this measurement, the nozzle 13 reaches above the edge 35d of the single plate 35 that is a predetermined distance away from the imaginary line BB. When this is detected by the rotary encoder, a signal is output from the control mechanism 25 to operate the air compressor, and the adhesive 13 a is ejected from the nozzle 13. When the nozzle 13 moves horizontally in this state, the adhesive 13a is attached to the inclined surface 36 of the single plate 35 in a streak shape as shown in FIG.
[0017]
When the horizontally moving nozzle 13 reaches above the imaginary line BB, that is, above the edge 35a of the single plate 35, a signal is output from the control mechanism 25 to stop the operation of the air compressor, and the adhesive 13a is ejected. Cancel. As a result, as in the case shown in FIG. 9, the adhesive 13 a is attached to the entire inclined surface 36 of the single plate 35 in a streak shape.
When the rotary encoder further measures that the nozzle 13 continues to move and reaches the initial standby position shown in FIG. 2, a signal is output from the control mechanism 25 to stop the operation of the reciprocating member, The movement of the nozzle 13 is stopped and waited.
Next, the single plate 35 is stopped on the second conveyor 3 by forward running of the first conveyor 1 in the same manner as the operation after the adhesive 13a is attached to the inclined surface 32 of the single plate 33 in FIG. Moving to a position where the lower surface side adhesive 13a of the single plate 35 is in contact with the upper inclined surface 34 of the bonded single plate P, stopping the first conveyor 1, an air cylinder 17, the upper end of the single plate 33 and the lower end of the single plate 35 are pressed against the cooling plates 19, 21 (see FIG. 19) after a predetermined time has elapsed. The air cylinder 17 is lowered and the cooling plate 19 is moved to the standby position to stand by sequentially, and the bonded single plate P and the single plate 35 are bonded and integrated. (Hereinafter, the joined single plate P and the single plate 35 joined together are referred to as a joined single plate S).
[0018]
Next, the upper end 33c of the joining veneer P is moved between the cooling plates 19 and 21 in advance by the operation of each member such as the first conveyor 1 in the order of FIG. 13, FIG. 14, FIG. 15, FIG. The joint veneer S is moved by the same operation as when moved to the set position, and the upper end 35c of the joint veneer S is moved in advance between the cooling plates 19 and 21 as shown in FIG. Move to the set position. On the other hand, after moving the single plate 33 placed on the first conveyor 1 and the single plate 33 to FIGS. 5 and 6, the adhesive 13a is moved to the lower inclined surface 32 by the parallel movement of the nozzle 13 in the direction of the arrow in FIG. As shown in FIG. 20, the adhesive 13 a is attached to the lower inclined surface 41 of the succeeding single plate 39 by the same operation as that applied to. Next, the subsequent single plate 39 is moved with respect to the bonded single plate S by the same operation as the single plate 33 is moved with respect to the stopped single plate 31 as shown in FIG. The joining single plate S and the succeeding single plate 39 are joined by pressure welding.
The single plate S and the single plate 39 after joining similarly move the upper end 39c to a preset position between the cooling plates 19 and 21, and further convey the subsequent single plate (not shown). 18 and the nozzle 13 by the movement of the nozzle 13 in the direction of the arrow in FIG. 18, adhesion of the adhesive to the lower inclined surface of the subsequent single plate, movement of the subsequent single plate, and pressure contact between the cooling plates 19 and 21. The single plates are sequentially joined by repeating these operations thereafter.
Moreover, when the length of the joined single plate becomes more than a predetermined length, it is cut into a predetermined length by a cutting device such as a saw while the first conveyor 1 and the second conveyor are stopped.
[0019]
As described above, in the embodiment of the present invention, the adhesive is ejected to the inclined surfaces 32, 36, 41 of the scarf cut portions of the single plates 33, 35, 39,. The nozzle 13 provided with a hole is parallel to the tips 33b, 35b, 39b,... Of the single plates 33, 35, 39,. Then, the adhesive 13a is applied to the inclined surface.
Therefore, adhesive can be applied in the desired range in the thickness direction of the inclined surface, and it is not applied in large quantities on the surface of the single plate following the inclined surface of the inclined surface. Also, the bonded single plates do not adhere to each other.
In addition, in the case of the single plate 33, for example, when the nozzle 13 moves and reaches above the end edge 33a, the adhesive 13 starts to be ejected from the ejection hole, and the nozzle 13 moving in this state reaches above the other end edge 33d. Then, the ejection of the adhesive is stopped. In this case, it is not necessary to control the precise timing at the start of the ejection and at the time of the termination of the ejection. That is, before the nozzle 13 reaches the upper side of the edge 33a, the ejection of the adhesive is started in advance, and the ejection of the adhesive is stopped after the moving nozzle 13 has passed over the other edge 33d. Even if it does, the adhesive agent which was not apply | coated to the inclined surface 32 of the veneer 33 does not adhere to the other location of the veneer 33, and even if the bonded veneer is deposited one after another, the bonded veneers Will not adhere.
Furthermore, the amount of adhesive applied is determined by the amount of adhesive per unit time ejected from the nozzle ejection hole and the speed at which the nozzle moves, and a desired amount of adhesive can be applied. Furthermore, even if there are fine irregularities on the inclined surface of the scarf cut portion, the adhesive can be applied almost uniformly over the entire surface.
[0020]
Next, a modified example of the embodiment of the invention will be described.
1. The length in the direction toward the tip of the inclined or parallel surface of the notched portion of the plate-like body such as a single plate is, for example, an inclination with respect to the front and back surfaces of the single plate in the case of the scarf cut portion in the embodiment of the invention Even if the angle is the same, it changes as the thickness of the veneer changes. For this reason, when the length of the notch changes in the inclination direction, it is necessary to replace the nozzle with the ejection hole corresponding to the change. It can be implemented with a simple configuration.
That is, for example, as shown in FIG. 21, a nozzle 13 having a jet hole 55 (shown by a solid line for convenience) having a width indicated by a two-dot chain line corresponding to the length L1 of the inclined surface of the single plate 51 in the inclination direction is provided. The adhesive is applied by moving in the direction of the arrow provided parallel to the tip 51c of the plate 51. Next, as shown in FIG. 22, when the adhesive is applied to the single plate 53 that is L2 whose length in the inclined direction of the inclined surface is smaller than L1, the ejection hole is formed inside the width of L2 indicated by a two-dot chain line. The nozzle 13 is rotated in the same horizontal plane with respect to the case of FIG.
Thus, by rotating the nozzle 13 as described above according to the length of the inclined surface in the inclination direction, it is not necessary to prepare nozzles having different arrangements of the ejection holes.
2. The adhesive to be applied may be a thermosetting adhesive in addition to the thermoplastic adhesive, and in this case, the cooling plates 19 and 21 may be a pair of hot plates.
3. In the embodiment of the invention, the case where the veneer is bonded in the fiber direction has been described. However, in the case of performing so-called recumbent bonding in which the veneer is bonded in the direction perpendicular to the fiber direction, the adhesive is applied in the same manner. You may do it.
4. The shape of the cutout portion of the plate-like body such as a single plate may be formed as follows in addition to the continuous inclined surface as shown in the embodiment of the present invention. That is, as shown in FIG. 23, a plate-like body 61 having a stepped portion 57 in the middle of the inclined surface 59 may be used, and the plate-like body 61 is moved in the direction of the arrow to match the stepped portion 57 and the inclined surface 59. It joins with the plate-shaped body 63 in which the shape notch part was formed.
Further, as shown in FIG. 24, the end portions of the plate-like bodies 67 and 71 may be cut out at substantially the same depth, and the flat surfaces 65 and 69 may be joined together to join the two plate-like bodies 67 and 71 together.
Further, as shown in FIG. 25, one plate-like body 75 is formed with a concave arcuate surface 73, and the other plate-like body 79 is formed with a convex surface 77 that coincides with the surface 73. 73 and 77 may be combined and the two plate-like bodies 75 and 79 may be joined.
In short, the shape of the notches may be any shape that fills the notches when the plate-like bodies are joined.
[0021]
5. The plate-like body may be a single plate, a laminated material such as plywood, LVL (Laminated Veneer Lumber), or a wooden plate material such as MDF (Medium Density Fiberbord).
6. In the embodiment of the invention, the adhesive is applied by moving the nozzle 13 in the direction perpendicular to the conveying direction with respect to the conveying direction of the single plate, but it may be applied as follows.
That is, after the plate-like body 81 at the position indicated by the two-dot chain line in FIG. 26, which is a plan explanatory view of the main part, is conveyed in the direction of the arrow X and waits at the position indicated by the solid line, the nozzle 13 is moved to the position indicated by the arrow Z. The adhesive may be applied by moving in the direction. After the application, the plate-like body 81 is moved in the direction of the arrow Y, and bonding is performed by the same operation as in the embodiment of the invention.
On the other hand, with the nozzle 13 fixed, the plate-like body 81 is continuously conveyed in the direction of arrow X from the position indicated by the two-dot chain line through the position indicated by the solid line, and the edge 81a of the plate-like body 81 is the nozzle. It is also possible to start the ejection of the adhesive from the ejection hole when reaching below the nozzle 13 and stop the ejection of the adhesive from the ejection hole when the edge 81d of the plate-like body 81 reaches below the nozzle 13. .
7. If the adhesive applied to the surfaces inclined or parallel to the front and back surfaces of the plate-like body is not inclined, even if sequentially deposited after bonding, there is no problem such that the bonded single plates adhere to each other. You may adhere to the surface of the plate-shaped body following a parallel surface.
[0022]
【The invention's effect】
As described above, in the coating method of the present invention, the range in which the adhesive is applied in the direction toward the tip of the notched portion of the inclined or parallel surface is determined by the position of the ejection hole provided in the thickness direction of the nozzle. The amount of adhesive applied is determined by the amount of adhesive per unit time ejected from the nozzle orifice and the speed at which the nozzle moves.
Therefore, adhesive can be applied in the desired range in the thickness direction of the notch, and a large amount is applied to the surface of the plate-like body that protrudes greatly from the notch in the direction toward the tip and follows the inclined surface of the notch. However, even if the plate-like bodies are sequentially deposited after bonding, the plate-like bodies do not adhere to each other.
Even if the inclined surface of the notch has fine irregularities, the adhesive can be applied almost uniformly over the entire surface.
[Brief description of the drawings]
FIG. 1 is an explanatory side view of an apparatus according to an embodiment of the invention.
FIG. 2 is an explanatory plan view when viewed in the direction of the arrow from the one-dot chain line AA in FIG. 1;
FIG. 3 is a perspective view of a single plate.
FIG. 4 is an operation explanatory diagram.
FIG. 5 is an operation explanatory diagram.
FIG. 6 is an operation explanatory diagram.
FIG. 7 is an operation explanatory diagram.
FIG. 8 is an operation explanatory diagram.
FIG. 9 is an operation explanatory diagram.
FIG. 10 is an operation explanatory diagram.
FIG. 11 is an operation explanatory diagram.
FIG. 12 is an operation explanatory diagram.
FIG. 13 is an operation explanatory diagram.
FIG. 14 is an operation explanatory diagram.
FIG. 15 is an operation explanatory diagram.
FIG. 16 is an operation explanatory diagram.
FIG. 17 is an operation explanatory diagram.
FIG. 18 is an operation explanatory diagram.
FIG. 19 is an operation explanatory diagram.
FIG. 20 is an operation explanatory diagram.
FIG. 21 is an explanatory plan view of a modified example.
FIG. 22 is an explanatory plan view of a modification example.
FIG. 23 is an explanatory side view of a modified example.
FIG. 24 is an explanatory side view of a modified example.
FIG. 25 is an explanatory side view of a modified example.
FIG. 26 is an operation explanatory diagram of a modified example.
FIG. 27 is an explanatory diagram of a conventional method.
FIG. 28 is an explanatory diagram of a conventional method.
[Explanation of symbols]
1. First conveyor
3. Second conveyor
11. Stopper
13. Nozzle
13a ... Adhesive
19. Movable cooling plate
21 .. Fixed cooling plate
23 .. Optical sensor
25 ... Control mechanism
27, 32, 36, 41 .. Inclined surface
31, 33, 35, 39 · · Single plate

Claims (2)

板状体の端部に切欠部を形成することにより得られた板状体の表裏面に対し傾斜した又は平行な面に接着剤を塗布する際、切欠部の先端に向かう方向の全幅に対応して接着剤を噴出する噴出孔を備えたノズルであって、該ノズルのある同一水平面において回動自在に設けた該ノズルを、該傾斜した又は平行な面に相対した状態で、板状体の切欠部の先端と直交する一方の端縁から他方の端縁に至るまで該先端と平行に移動させることを特徴とする板状体の切欠部への接着剤の塗布方法。Corresponds to the full width in the direction toward the tip of the notch when applying adhesive to the surface inclined or parallel to the front and back of the plate obtained by forming the notch at the end of the plate A nozzle having an ejection hole for ejecting the adhesive , and the nozzle provided so as to be rotatable in the same horizontal plane where the nozzle is disposed, in a state facing the inclined or parallel surface. A method of applying an adhesive to a notch in a plate-like body, wherein the adhesive is moved in parallel with the tip from one edge perpendicular to the tip of the notch to the other edge. 板状体の端部に切欠部を形成することにより得られた板状体の表裏面に対し傾斜した又は平行な面に接着剤を塗布する際、切欠部の先端に向かう方向の全幅に対応して接着剤を噴出する噴出孔を備えたノズルを、該ノズルのある同一水平面において回動自在に設け、板状体を、該傾斜した又は平行な面に相対した状態で、前記先端に向かう方向と直交する方向に移動させることを特徴とする板状体の切欠部への接着剤の塗布方法。Corresponding to the full width in the direction toward the tip of the notch when applying adhesive to the surface inclined or parallel to the front and back of the plate obtained by forming the notch at the end of the plate Then, a nozzle having an ejection hole for ejecting the adhesive is rotatably provided on the same horizontal plane where the nozzle is located, and the plate-like body is directed to the tip in a state of being opposed to the inclined or parallel surface. A method for applying an adhesive to a notch in a plate-like body, wherein the adhesive is moved in a direction orthogonal to the direction.
JP07207899A 1999-03-17 1999-03-17 Application method of adhesive to notch of plate Expired - Fee Related JP4077575B2 (en)

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JP07207899A JP4077575B2 (en) 1999-03-17 1999-03-17 Application method of adhesive to notch of plate

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JP07207899A JP4077575B2 (en) 1999-03-17 1999-03-17 Application method of adhesive to notch of plate

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JP2000263514A JP2000263514A (en) 2000-09-26
JP4077575B2 true JP4077575B2 (en) 2008-04-16

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JP4994644B2 (en) * 2005-11-15 2012-08-08 株式会社名南製作所 How to apply adhesive to a veneer
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