JP4332210B2

JP4332210B2 - Undried veneer veneer and processing method and apparatus for undried veneer veneer

Info

Publication number: JP4332210B2
Application number: JP2000239330A
Authority: JP
Inventors: 由則小羽
Original assignee: Meinan Machinery Works Inc
Current assignee: Meinan Machinery Works Inc
Priority date: 1999-08-16
Filing date: 2000-08-08
Publication date: 2009-09-16
Anticipated expiration: 2020-08-08
Also published as: JP2001121506A

Description

【０００１】
【発明の属する技術分野】
本発明は、合板、ＬＶＬ（Laminated Veneer Lumber）等の製造に用いる未乾燥ベニヤ単板（以下生単板という）並びに生単板の加工方法及び装置に関するものである。
【０００２】
【従来の技術】
従来合板等の積層材の製造において、例えば３プライの合板の場合、中板と呼ばれる乾燥された単板の表裏両面に接着剤を塗布し、この中板に表板及び裏板を重ね合わせホットプレスで加熱圧接し接着していた。
【０００３】
【発明が解決すべき課題】
しかるに、原木の種類によっては繊維が複雑に傾斜しているものがあり、中板１０１を乾燥した際、図１８に示す様に、木口側端部に発生する割れ１０１ａのある箇所で、乾燥による収縮により、部分１０１ｂの木口側端部の一部が隣り合う部分１０１ｃに重なり合うことがある。
この状態で中板１０１を上記方法で接着剤により表板及び裏板と接着すると、前記２つの部分が重なりあった箇所１０１ｄが表板を通じて筋状の欠点とし表れ、特に表板に更に突板を接着したり塗装するとより顕著に表れてしまい、商品価値を低下させていたのである。
【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、テンダーライジング加工により、繊維方向の中央部が同方向の両木口端縁側に比べて繊維方向と直交する方向により大きく引き伸ばされていて表裏一方側に中高状態になった生単板とするものである。また厚さ方向に貫通し単板の木口端縁と交差する方向に任意長さで連続する塑性変形された割れが、両木口端縁から各々内側の所定距離の箇所を除いて、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成されていて表裏一方側に中高状態になった生単板としても良い。更には厚さ方向に圧縮塑性変形された箇所が、単板の両木口端縁から各々内側の所定距離の箇所を除いて、多数形成されていて表裏一方側に中高状態になった生単板としても良い。また厚さ方向に貫通し単板の木口端縁と交差する方向に任意長さで連続する割れが、両木口端縁から各々内側の所定距離の箇所を除いて、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成されており、更には前記所定距離の箇所を除いて、前記木口端縁と直交する方向で隣り合う前記割れの間には、厚さ方向に圧縮塑性変形された箇所が形成されていて表裏一方側に中高状態になった生単板としても良い。
一方加工方法としては、両木口端縁から各々内側の所定距離の箇所を除いて生単板に、厚さ方向に貫通し単板の木口端縁と交差する方向に任意長さで連続する塑性変形された割れを、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて、多数形成する。また両木口端縁から各々内側の所定距離の箇所を除いて生単板に、厚さ方向に圧縮塑性変形された箇所を、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて、多数形成しても良い。また両木口端縁から各々内側の所定距離の箇所を除いて生単板に、厚さ方向に貫通し単板の木口端縁と交差する方向に任意長さで連続する割れが、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成し、更には前記所定距離の箇所を除いて、前記木口端縁と直交する方向で隣り合う前記割れの間には、厚さ方向に圧縮塑性変形された箇所を形成しても良い。
【０００５】
加工装置としては、軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面には単板を繊維方向と直交する方向に広げる突起部及び単板を圧縮塑性変形させる突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送される単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成する。また軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面には単板を繊維方向と直交する方向に広げ且つ単板を圧縮塑性変形させる突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送される単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成しても良い。
更には軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面には単板を繊維方向と直交する方向に広げる鋭利な先端と単板を圧縮塑性変形させる幅広の面とを有する突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送される単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成されていても良い。
【０００６】
【発明の実施の形態】
次に本発明の実施の形態を、実施例により説明する。
図１に示すように、一対のロール１及び３を軸中心線を平行で相対して配置する。
ロール１は、モータ（図示せず）により回転駆動される円柱状の基部５と、基部５に軸中心線方向に並べて装着される３種類のリング状部材７、９及び１１とから成っている。
各リング状部材７、９及び１１は軸中心線方向の幅が３５ｍｍ、外径が２５０ｍｍで内径が基部５の外径と等しく、リング状部材７は基部５の軸中心線方向の両端のみに配置され、また両リング状部材７の間にリング状部材９及び１１が軸中心線方向で交互に配置されている。これらリング状部材７、９及び１１は、公知のキー溝及びキー（図示せず）により基部５から動力が伝達され、回転駆動される。
リング状部材７の周面７ａには、突起部が形成されておらず平坦となっている。
ロール１の半径方向で周面７ａと同一位置にあるリング状部材９の周面９ａには、円Ａで囲んだ部分の拡大説明図である図２に示すように、また図２の一点鎖線Ｅ−Ｅより矢印の方向を見た断面説明図は図３示すように、図２の一点鎖線Ｆ−Ｆより矢印の方向を見た断面説明図は図４に示すように、図２で一点鎖線Ｇ−Ｇより矢印の方向を見た図は図５に示すように、先端に鋸歯状の突起１３ａを有する突起部１３が設けられている。
【０００７】
この様な突起部１３は、最初に、リング状部材９の外周に、ロール１の軸中心線と平行に連続し一点鎖線Ｅ−Ｅと平行な如何なる断面においても形状が図３に示すようになる突起を形成し、次いでリング状部材９をロール１に装着された場合の回転方向に回転させ、バイト（図示せず）により図５における該突起の斜線部分を削り取ることで形成するのである。
ここでθ１は５０度とし、鋸歯１３の周面からの高さＬ１は２ｍｍ、軸中心線方向の間隔Ｌ２は１ｍｍとなっており、この様な突起部１３がリング状部材９に、ロール１の回転方向に７ｍｍの間隔で設けられている。
【０００８】
また同じくロール１の半径方向で周面７ａと同一位置にあるリング状部材１１の周面１１ａには、円Ｂで囲んだ部分の拡大説明図は図６に示すように、また図６の一点鎖線Ｈ−Ｈより矢印の方向を見た断面説明図は図７示すように、図６の一点鎖線Ｊ−Ｊより矢印の方向を見た断面説明図は図８に示すように、図６で一点鎖線Ｋ−Ｋより矢印の方向を見た図は図９に示すように、突起部１５が設けられている。
この様な突起部１５は、最初に、リング状部材１１の外周に、ロール１の軸中心線と平行に連続し一点鎖線Ｈ−Ｈと平行な如何なる断面においても形状が図７に示すようになる突起を形成し、次いでリング状部材１１をロール１に装着された場合の回転方向に回転させ、バイト（図示せず）により図９における斜線部分を削り取ることで形成するのである。
ここでθ２は８０度とし、突起部１５の周面からの高さＬ３は１ｍｍ、軸中心線方向の間隔Ｌ４は１ｍｍとなっており、この様な突起部１５がロール１の回転方向に３ｍｍの間隔で設けられている。
【０００９】
一方、ロール３は従動回転自在に支持され、直径は同様に３００ｍｍで周面に厚さ３０ｍｍのウレタンゴム１７が全体に接着固定されている。このロール３のウレタンゴム１７の周面と、ロール１の周面７ａ、９ａ及び１１ａとの間隔が約１ｍｍとなるように配置されている。その結果、突起部１３の突起１３ａは、ロール３のウレタンゴム１７に１ｍｍほど食い込むことになる。
【００１０】
以上のように構成された装置において、ロール１を駆動回転させると、前記の様に突起１３ａがウレタンゴム１７に食い込むような位置で設けられているので、ロール１の回転がロール３にも伝達され、ロール３も回転する。
この状態で、例えば厚さが３ｍｍで、繊維方向の長さが、ロール１の一方のリング状部材７の外側端縁から１０ｍｍ程度内側の位置から他方のリング状部材７の外側端縁から１０ｍｍ程度内側の位置に至るまでの長さの生単板Ｔを、両ロール１、３の間に軸中心線方向の中央へ、搬送方向が繊維方向と直交する方向（以下、直交方向という）で裏割れ側を上面として挿入する。
【００１１】
そこで生単板Ｔにおいて、ロール１の軸中心線方向の両端部に設けたリング状部材７の箇所を通過する部分では、圧縮されるだけで割れは形成されない。
また同じくリング状部材１１の箇所を通過する部分では、突起部１３は図３に示すように先端に向かって鋭角となっていることに加え、突起１３ａが設けられており、また前記のように突起１３ａがウレタンゴム１７に食い込むような位置に設けられているので、圧接される突起部１３の先端は生単板Ｔの裏側へ突き抜ける。この突起部１３が生単板Ｔを突き抜けた状態では、突起部１３により生単板Ｔは部分的に直交方向に伸ばされることになる。
【００１２】
一方生単板Ｔにおいて、同じくリング状部材７に隣り合う位置にあるリング状部材９の箇所を通過する部分では、突起部１５はその先端が図６に示すような角錐状となっており且つ図８で示したように周面１１ａからの高さが１ｍｍであるため、突起部１３の様にロール３のウレタンゴム１７に食い込むこともなく、生単板Ｔを圧縮する。そのため該リング状部材９の箇所を通過する部分では、直交方向に伸ばされながら塑性変形され、生単板Ｔの加工後の表面の部分拡大説明図である図１０に示す様に、繊維方向に連続する塑性変形された箇所１９が形成されて前記伸ばされた状態が保たれる。
この塑性変形された箇所１９は、前述のリング状部材９の突起部１３が挿入され生単板Ｔが直交方向に伸ばされることと同時に形成される。
それ故、ロール１、３の回転により生単板Ｔから突起部１３及び突起部１５が離れた後、前記突起部１３が圧接されて直交方向に伸ばされていた箇所は、突起部１３が圧接される前の状態に復帰することが、繊維方向で隣り合って形成される該塑性変形された箇所１９により殆ど阻止される。そのため突起部１３が圧接された箇所は、生単板Ｔに図１０に示す様に直交方向に広げられた割れ２１として残る。
【００１３】
このようにロール１、３の間を通過した生単板Ｔの直交方向の長さは、リング状部材７で圧接された箇所（以下、非伸延箇所という）では通過前と比べ殆ど変化無いが、リング状部材９及び１１が圧接された箇所（以下、伸延箇所という）では通過前と比べ長くなっている。
しかし該長くなった伸延箇所は、非伸延箇所により自由に伸びることを制限されるため、生単板Ｔは全体としてはこれら長さの違いにより、図１１に示すように中央が例えば上向きに凸となる中高の形状になる。
このような形状となった生単板Ｔを乾燥しても中高の形状は大きく変わることはなく、乾燥された単板Ｔを中板として両面に接着剤を塗布し、表裏面に表板及び裏板を重ね合わせ、ホットプレスで加熱圧接し例えば３プライの合板を製造する。
すると表板及び裏板の間で単板Ｔは、ホットプレスでの圧接により前記中高の形状が平坦な状態に即ち伸延箇所が平坦に矯正されることになるが、この伸延箇所が平坦になることで図１２に示す様に単板Ｔの非伸延箇所は矢印の方向即ち直交する方向に引張力を受けることになる。
そこで、単板Ｔの木口側端部に図１８に示すような重なりあった箇所１０１ｄがあっても、該矢印の方向に作用する引張力により、重なり合っていた部分１０１ｂ及び１０１ｃがずれて図１３に示す様に重なり合う部分が殆ど無くなるのである。
その結果、前記従来技術で述べた様な、重なりあった箇所が表板を通じて筋状の欠点とし現れ、商品価値を低下させることが少なくなるのである。
【００１４】
前記発明の実施例で、装置としては以下の様に変更しても良い。
図１４に示す様に、ロール２３はロール１と同様に構成し、ロール２３に相対して配置するロール２５はロール３と同様に従動回転自在に支持され、周面に厚さ３０ｍｍのウレタンゴム１７が接着固定されているが、次の構成が異なる。
即ち、周面に接着固定されているウレタンゴムを切削加工し、図１４で左右方向の中央２５ａに向かうにつれて直径が大となる太鼓状とする。
これら寸法は、図１４では分かり易くするため実際の寸法より割合を変えて示したが、例えば、ロール２５前記左右方向の長さが２５００ｍｍの場合、中央部２５ａの直径を３００ｍｍとし両端の直径を中央部より０．６ｍｍ小さくなる様にする。またロール２３とロール２５の中央部における図１４における上下方向の間隔は、１ｍｍとなるように配置する。
この様な構成で、回転駆動されるロール２３とロール２５との間に生単板を直交方向に挿入すると、前記実施例で示した作用が、生単板の図１４の左右方向の中央部及びその周辺で生じて直交方向に伸ばされる。
一方、生単板の繊維方向の両端部に向かうにつれて、ロール２３とロール２５との間隔が中央部に比べて広くなるため、突起部１３及び突起部１５が生単板を圧接又は圧縮する量が小さくなり、直交方向に伸ばされる量が少なくなる。
その結果、ロール２３とロール２５との間を通過した生単板は、図１１に示した場合と同様に、中央が例えば上向きの中高の形状になり、同様に合板を製造した場合でも、単板の木口側端部で重なり合うことが少なくなるのである。
この場合、ロール１と同様に構成するロール２３において、両端部に設けたリング状部材７を省略しても同様の作用が得られる。
【００１５】
更に本発明の実施例での装置は、以下の様に変更しても良い。
１、ベニヤレースで長尺例えば繊維方向の長さが６尺用として１８８０ｍｍの長さで生単板を切削し、該状態で乾燥した後、中央で分割し同方向長さが９４０ｍｍとして各々３尺用の単板とする場合は、以下の様に構成しても良い。
図１５に示す様に、ロール１と同様にリング状部材９及び１１を軸中心線方向に交互に備え且つリング状部材７は用いないで構成され、軸中心線方向の長さが２１００ｍｍのロール２７に対し、同様の長さで周面にウレタンゴムが接着固定されているロール２９を、左右両端から各々５８０ｍｍ程の箇所２９ａが、図１４で示した場合と同様に最大直径となる用に太鼓状に形成するのである。例えばロール２９で、最大直径となる部分２９ａの直径を３００ｍｍとし、軸中心線方向の両端及び中央部の直径を０．６ｍｍ小さくなる様にする。
この様に構成して回転駆動されるロール２７とロール２９との間に軸中心線方向の中央へ、繊維方向の長さが１８８０ｍｍの生単板を直交方向に挿入すると、生単板の、最大直径の部分２９ａ及びその周辺を通過する箇所が他の箇所に比べて同様に直交方向に大きく伸ばされる。即ち、生単板で最大直径の部分２９ａを通過する箇所は生単板の繊維方向の中央から両側に各々４７０ｍｍ離れた箇所であり、この生単板を乾燥後、維方向の中央で切断分割して該方向の長さが９４０ｍｍの２枚の単板とすると、各単板の繊維方向の中央及びその周辺が大きく伸ばされ、該方向の端部付近が殆ど伸ばされていないことになる。
それ故、これら単板を更に直交方向で所定長さに切断すると図１１と同様に中高状態となり、前記と同様に合板を製造した場合でも、単板の木口側端部で重なり合う部分が無くなるのである。
【００１６】
２、生単板に圧縮塑性変形した箇所を形成する部材としては、図６乃至９で示した突起部１５に代えて、生単板の繊維方向の所定長さ例えば３０mm程度で連続し押圧部が平坦な突起体としても良い。
３、前記実施例では、生単板を直交方向に広げるための突起部と生単板を塑性変形させるための突起部とを各々設けたが、１個の突起部で前記２つの機能を備えるように、図１６及び図１６の部分拡大図である図１７に示すように構成しても良い。
即ちロール３１は、例えば軸中心線方向の長さが１３０ｍｍ、直径３０ｍｍであり、周面に多数の切込刃３３が形成されている。各切込刃３３は図１７に示すようにロール３１の軸中心線方向と平行で長さ２ｍｍの刃先部３３ａを有し、刃先部３３ａの両端には幅広の箇所として、軸中心線方向の長さ１ｍｍの加圧用の段部３３ｂが切欠き形成されている。また切込刃３３のロール３１の周面から半径方向の高さは３．５ｍｍ、刃先部３３ａと直交する方向での断面形状が頂角３５度の二等辺三角形であり、段部３３ｂは該半径方向で同じく周面から１．８ｍｍの位置に形成されている。
以上のようなロール３１の両端の軸３５を軸受（図示せず）により回動自在に支持し、図１で示したロール１に代えて、同じく直交方向に挿入される生単板の繊維方向の両端の例えば３０ｍｍ程度残して内側の部分に圧接できるように、軸中心線方向に多数並べて配置する。
上記のような切込刃３３が生単板に圧接されると、刃先部３３ａは生単板に切込を形成し直交方向に広げると同時に、段部３３ｂは形成された切込に隣接する箇所を塑性変形させる。
そのためロール３１とロール１７の回転により切込刃３３が生単板から離れても、前記直交方向に広げられた状態が殆ど復帰せず残り、前記実施例と同様の効果が得られる。
【００１７】
４、１個の突起部で生単板を直交方向に広げる作用と塑性変形させる作用とを有するための形状としては、以下のようの構成しても良い。
図１８は突起部を備えたロール３７の正面説明図、図１９は図１８の円Ｓ内の部分拡大説明図、図２０は図１９の一点鎖線Ｃ−Ｃより矢印の方向を見た断面説明図、図２１は図１９の一点鎖線Ｄ−Ｄより矢印の方向を見た一部断面説明図、図２２は図１９の一点鎖線Ｅ−Ｅより矢印の方向を見た説明図である。
ロール３７は、次のように構成されている。基部３９はモータ（図示せず）により回転駆動させられる鋼製の円柱状の部材であり、その周囲には、軸中心線方向の幅が３８ｍｍ、内径が基部３９の外径とほぼ等しくまた外径（後述する突起部４５の先端４５ａが描く仮想円の直径）が１９８ｍｍである同じく鋼製の多数のリング状部材４１ａ、４１ｂ、４１ｃ・・がキー（図示せず）により装着固定されてなる。各リング状部材４１ａ、４１ｂ、４１ｃ・・の周面４３には、図１９乃至図２２に示す用に、先端に切欠部４５ｂを有する突起部４５が設けられている。
【００１８】
即ち各リング状部材４１ａ、４１ｂの場合で示すと、周面４３には半径方向に突出し軸中心線方向に連なり、軸中心線方向と直交する方向の断面形状が、頂角即ち図２０でθ３が４０度であって、周面４３からの半径方向の高さ即ち図２０及び図２１でＬ５＝３．５ｍｍとなる突起部４５を、回転方向の間隔即ち図１９でＬ７＝７ｍｍとして多数列形成してある。また突起部４５の先端部には、図２２に示す様にバイトにより先端４５ａから半径方向にＬ６ａ＝０．８ｍｍの深さでθ４＝８０度となり底部４５ｃを有する切欠部４５ｂを、軸中心線方向の間隔即ちＬ６＝１．３ｍｍで多数形成することで、幅広の面として先端４５ａから底部４５ｃまでの間の傾斜した面が設けられる。
上記のように突起部４５を形成したリング状部材４１ａ、４１ｂ、４１ｃ・・で隣り合う同士は、例えばリング状部材４１ａ、４１ｂの場合で説明すると、図１９に示すように突起部４５のロール３７の軸中心線方向での間隔Ｌ８が３ｍｍとなるように設けられている。
一方回転方向では、リング状部材４１ａの突起部４５がリング状部材４１ｂの突起部４５より間隔Ｌ９が１．５ｍｍとなるようにずれた状態で基部３９に設けられている。
またリング状部材４１ｂ、４１ｃでは、Ｌ８に相当する互いの突起部４５の軸中心線方向の間隔が３ｍｍとなることは同様であるが、Ｌ９に相当する回転方向の間隔がリング状部材４１ｂの突起部４５に対し、リング状部材４１ｃの突起部４５が回転方向と逆の方向に１．５ｍｍずれた状態で基部３９に設けられている。
以下リング状部材４１ｄは回転方向に同じ量と、リング状部材毎に回転方向又は回転方向と逆の方向に交互に１．５ｍｍずれて設けられている。
【００１９】
このような突起部４５を備えたロール３７に対し、図１４で示したロール２５を相対して配置し、ロール２５の最大直径の箇所２５ａで、ロール２５の周囲に設けてあるウレタンゴムに１ｍｍ食い込むように配置する。
以上の様に構成した両ロール３７及び２５間へ例えば厚さ３ｍｍの生単板を直交する方向へ挿入する。
そこで生単板で最大直径の箇所２５ａの箇所及びその近くを通過する部分では、突起部４５が圧接されると、突起部４５の先端４５ａが生単板に食い込むことにより生単板を直交する方向へ広げ、また突起部４５の底部４５ｃにより生単板を圧縮塑性変形させることで、該広がった状態が殆ど復帰しない。
一方、生単板で最大直径の箇所２５ａから離れる程、生単板に対する前記突起部４５の作用が小さくなるため、通過後の生単板は、同じく図１１に示す様になる。
５、繊維方向の中央部が同方向の両木口端縁側に比べて直交する方向により大きく引き伸ばすためのテンダーライジング加工としては、前記の様に厚さ方向への塑性変形の他に、直交方向ヘ少なくとも塑性変形するまで引張力を加えるものであっても良い。
６、生単板の繊維方向の中央部が同方向の両木口端縁側に比べて繊維方向と直交する方向により大きく引き伸ばすテンダーライジング加工は、該中央部が該方向に大きく引き伸ばされれば、両木口端縁側に行っても良い。
【００２０】
【発明の効果】
以上の様に本発明によれば、単板が部分的に重なり合うことで、得られた合板等の商品に表板を通じて筋状の欠点とし現れ商品価値を低下させることが殆ど無い。
【図面の簡単な説明】
【図１】発明の実施例の部分正面説明図である。
【図２】図１の円Ａで囲んだ部分の拡大説明図である。
【図３】図２の一点鎖線Ｅ−Ｅより矢印の方向を見た断面説明図である。
【図４】図２の一点鎖線Ｆ−Ｆより矢印の方向を見た断面説明図である。
【図５】図２で一点鎖線Ｇ−Ｇより矢印の方向を見た説明図である。
【図６】図１の円Ｂで囲んだ部分の拡大説明図である。
【図７】図６の一点鎖線Ｈ−Ｈより矢印の方向を見た断面説明図である。
【図８】図６の一点鎖線Ｊ−Ｊより矢印の方向を見た断面説明図である。
【図９】図６で一点鎖線Ｋ−Ｋより矢印の方向を見た説明図である。
【図１０】生単板Ｔの表面の部分拡大説明図である。
【図１１】生単板Ｔの全体の斜視図である。
【図１２】単板Ｔの全体の斜視図である。
【図１３】単板Ｔの部分拡大説明図である。
【図１４】発明の実施例の変更例の説明図である。
【図１５】発明の実施例の変更例の説明図である。
【図１６】発明の実施例の変更例の正面説明図である。
【図１７】図１６の部分拡大説明図である。
【図１８】発明の実施例の変更例の正面説明図である。
【図１９】図１８の円Ｓ内の部分拡大説明図である。
【図２０】図１９の一点鎖線Ｃ−Ｃより矢印の方向を見た断面説明図である。
【図２１】図１９の一点鎖線Ｄ−Ｄより矢印の方向を見た一部断面説明図である。
【図２２】図１９の一点鎖線Ｅ−Ｅより矢印の方向を見た説明図である。
【図２３】従来技術の単板の拡大説明図である。
【符号の説明】
１・・ロール
３・・ロール
７・・リング状部材
９・・リング状部材
１１・リング状部材
１３・・突起部
１５・・突起部
１７・ウレタンゴム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an undried veneer veneer (hereinafter referred to as green veneer) used for manufacturing plywood, LVL (Laminated Veneer Lumber), and the like, and a processing method and apparatus for the green veneer.
[0002]
[Prior art]
Conventionally, in the production of laminated materials such as plywood, for example, in the case of 3-ply plywood, an adhesive is applied to both front and back surfaces of a dried single plate called a middle plate, and the front and back plates are superposed on the middle plate. It was heated and pressed with a press for adhesion.
[0003]
[Problems to be Solved by the Invention]
However, depending on the type of raw wood, there are fibers that are inclined in a complicated manner, and when the intermediate plate 101 is dried, as shown in FIG. Due to the contraction, a part of the end portion of the end portion 101b may overlap the adjacent portion 101c.
In this state, when the intermediate plate 101 is bonded to the front plate and the back plate with the adhesive by the above method, the overlapping portion 101d appears as a streak-like defect through the front plate. When it was bonded or painted, it appeared more prominently, reducing the commercial value.
[0004]
[Means for Solving the Problems]
In order to solve these problems, in the present invention, the center portion in the fiber direction is greatly stretched in the direction perpendicular to the fiber direction as compared to the both ends of both ends in the same direction by the tender rising process, so that the middle and high states on the front and back sides It is a raw veneer that has become. In addition, the plastically deformed cracks, which penetrate in the thickness direction and continue for an arbitrary length in the direction intersecting the veneer edge of the veneer, except for the predetermined distance inside each of the edge of both ends, It is good also as the raw veneer which was formed in the direction parallel to an edge, and the direction orthogonal to each other at appropriate intervals, and was in a middle-high state on one side of the front and back. Furthermore, the raw veneer in which a number of places where the plastic deformation was carried out in the thickness direction, except for the predetermined distance inside each from the edge of the both ends of the veneer, was in a state of middle and high on the front and back sides It is also good. Also, cracks that penetrate in the thickness direction and continue at an arbitrary length in the direction intersecting the veneer edge of the veneer are parallel to the edge of the mouth except for a predetermined distance inside each edge of both ends. A large number are formed at appropriate intervals in the direction and the direction orthogonal to each other, and in the thickness direction between the cracks adjacent to each other in the direction orthogonal to the edge of the mouth, except for the predetermined distance. It is good also as the raw veneer in which the location where compression plastic deformation was formed and which became the middle-high state in the front and back one side.
On the other hand, as a processing method, plastics that penetrate the raw veneer in the thickness direction except for a predetermined distance inside from the both ends of both ends and continue in an arbitrary length in the direction intersecting the end edge of the single plate A large number of deformed cracks are formed at appropriate intervals in a direction parallel to and perpendicular to the end edge of the end. In addition, a portion of the green veneer that is compressed and plastically deformed in the thickness direction except for a portion at a predetermined distance on the inner side from both ends of the both ends is appropriately spaced apart in a direction parallel to and perpendicular to the end of the end. Many of them may be formed. In addition, the raw veneer except for a predetermined distance on the inner side from both ends of the both ends of the raw veneer, a crack that penetrates in the thickness direction and continues in an arbitrary length in a direction intersecting the veneer end edge of the veneer, Thickness is formed between the cracks adjacent to each other in the direction perpendicular to the edge of the end of the mouth, except for a portion of the predetermined distance. You may form the place which carried out the compression plastic deformation in the direction.
[0005]
As a processing device, in a pair of rolls arranged so that the axial center line is parallel, on the peripheral surface of one of the rolls, a protrusion that spreads a single plate in a direction perpendicular to the fiber direction and a protrusion that compresses and plastically deforms the single plate The other roll is in a drum shape so that the central portion of the fiber direction of the single plate conveyed between the pair of rolls in a direction orthogonal to the fiber direction passes through the maximum diameter. Form. Further, in the pair of rolls arranged so that the axial center line is parallel, the peripheral surface of one of the rolls is provided with a plurality of protrusions that widen the single plate in a direction perpendicular to the fiber direction and compress the plastic single plate, and the other These rolls may be formed in a drum shape so that the portion of the single plate conveyed between the pair of rolls in the direction orthogonal to the fiber direction passes through the central portion in the fiber direction has the maximum diameter.
Furthermore, in a pair of rolls arranged so that the axial center line is parallel, on the peripheral surface of one roll, a sharp tip that widens a single plate in a direction orthogonal to the fiber direction, and a wide surface that compresses and plastically deforms the single plate A plurality of protrusions having a plurality of protrusions are provided, and the other roll has a maximum diameter at a portion where a central portion in the fiber direction of a single plate conveyed between a pair of rolls in a direction orthogonal to the fiber direction passes. It may be formed in a drum shape.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described by way of examples.
As shown in FIG. 1, a pair of rolls 1 and 3 are disposed with their axial centerlines parallel and facing each other.
The roll 1 includes a columnar base 5 that is rotationally driven by a motor (not shown), and three types of ring-shaped members 7, 9, and 11 that are mounted on the base 5 side by side in the axial center line direction. .
Each of the ring-shaped members 7, 9 and 11 has a width in the axial center line direction of 35 mm, an outer diameter of 250 mm, and an inner diameter equal to the outer diameter of the base portion 5, and the ring-shaped member 7 is only at both ends of the base portion 5 in the axial center line direction. The ring-shaped members 9 and 11 are alternately arranged between the ring-shaped members 7 in the axial center line direction. The ring-shaped members 7, 9, and 11 are driven to rotate by transmitting power from the base portion 5 through known key grooves and keys (not shown).
The peripheral surface 7a of the ring-shaped member 7 is flat with no protrusions.
As shown in FIG. 2 which is an enlarged explanatory view of a portion surrounded by a circle A, the peripheral surface 9a of the ring-shaped member 9 which is in the same position as the peripheral surface 7a in the radial direction of the roll 1 is shown in FIG. FIG. 3 shows a cross-sectional explanatory view as seen from the direction of the arrow from EE, and FIG. 4 shows a cross-sectional explanatory view as seen from the direction of the arrow from the alternate long and short dash line FF in FIG. A view of the direction of the arrow from the chain line G-G is provided with a protrusion 13 having a sawtooth protrusion 13a at the tip, as shown in FIG.
[0007]
Such a protrusion 13 is first formed on the outer periphery of the ring-shaped member 9 in any cross-section that is parallel to the axial center line of the roll 1 and parallel to the alternate long and short dash line EE as shown in FIG. Then, the ring-shaped member 9 is rotated in the rotation direction when it is mounted on the roll 1, and the oblique line portion of the protrusion in FIG. 5 is scraped off by a cutting tool (not shown).
Here, θ1 is 50 degrees, the height L1 from the peripheral surface of the sawtooth 13 is 2 mm, and the distance L2 in the axial center line direction is 1 mm. Such a protrusion 13 is formed on the ring-shaped member 9 and the roll 1 Are provided at intervals of 7 mm in the rotation direction.
[0008]
Similarly, an enlarged explanatory view of a portion surrounded by a circle B is shown in FIG. 6 on the peripheral surface 11a of the ring-shaped member 11 located in the same position as the peripheral surface 7a in the radial direction of the roll 1, as shown in FIG. FIG. 7 shows a cross-sectional explanatory view as seen from the direction of the arrow from the chain line H-H, and FIG. 6 shows a cross-sectional explanatory view as seen from the one-dot chain line JJ of FIG. A view of the direction of the arrow from the alternate long and short dash line KK is provided with a protrusion 15 as shown in FIG.
First, such a protrusion 15 is formed on the outer periphery of the ring-shaped member 11 in any cross-section that is parallel to the axial center line of the roll 1 and parallel to the alternate long and short dash line HH as shown in FIG. Then, the ring-shaped member 11 is rotated in the rotation direction when mounted on the roll 1, and the hatched portion in FIG. 9 is scraped off by a cutting tool (not shown).
Here, θ2 is 80 degrees, the height L3 from the peripheral surface of the protrusion 15 is 1 mm, the interval L4 in the axial center line direction is 1 mm, and such a protrusion 15 is 3 mm in the rotation direction of the roll 1. Are provided at intervals.
[0009]
On the other hand, the roll 3 is supported so as to be freely rotatable, and a urethane rubber 17 having a diameter of 300 mm and a thickness of 30 mm is adhered and fixed to the entire surface. It arrange | positions so that the space | interval of the surrounding surface of the urethane rubber 17 of this roll 3 and the surrounding surfaces 7a, 9a, and 11a of the roll 1 may be set to about 1 mm. As a result, the protrusion 13a of the protrusion 13 bites into the urethane rubber 17 of the roll 3 by about 1 mm.
[0010]
In the apparatus configured as described above, when the roll 1 is driven and rotated, the protrusion 13a is provided at a position where it will bite into the urethane rubber 17 as described above, so that the rotation of the roll 1 is also transmitted to the roll 3. Then, the roll 3 also rotates.
In this state, for example, the thickness is 3 mm, and the length in the fiber direction is about 10 mm from the outer edge of one ring-shaped member 7 of the roll 1 to 10 mm from the outer edge of the other ring-shaped member 7. The raw veneer T having a length up to the inner position is moved to the center in the axial center line direction between the rolls 1 and 3 in the direction in which the conveying direction is orthogonal to the fiber direction (hereinafter referred to as the orthogonal direction). Insert the back crack side as the top surface.
[0011]
Therefore, in the raw veneer T, in the portion passing through the location of the ring-shaped member 7 provided at both ends of the roll 1 in the axial center line direction, only the compression is performed and no crack is formed.
Similarly, in the portion that passes through the portion of the ring-shaped member 11, the protrusion 13 is provided with a protrusion 13a in addition to an acute angle toward the tip as shown in FIG. Since the protrusion 13 a is provided at a position where the urethane rubber 17 bites into the urethane rubber 17, the front end of the protrusion 13 that is pressed into contact with the back side of the raw veneer T. In a state where the protrusion 13 penetrates the raw veneer T, the raw veneer T is partially extended in the orthogonal direction by the protrusion 13.
[0012]
On the other hand, in the raw veneer T, at the portion that passes through the location of the ring-shaped member 9 that is also adjacent to the ring-shaped member 7, the protrusion 15 has a pyramid shape as shown in FIG. Since the height from the peripheral surface 11a is 1 mm as shown in FIG. 8, the raw veneer T is compressed without biting into the urethane rubber 17 of the roll 3 unlike the protrusion 13. Therefore, in the part that passes through the location of the ring-shaped member 9, it is plastically deformed while being stretched in the orthogonal direction, and in the fiber direction, as shown in FIG. A continuous plastically deformed portion 19 is formed and the stretched state is maintained.
The plastically deformed portion 19 is formed at the same time as the protrusion 13 of the ring-shaped member 9 is inserted and the green plate T is stretched in the orthogonal direction.
Therefore, after the protrusion 13 and the protrusion 15 are separated from the raw veneer T by the rotation of the rolls 1 and 3, the protrusion 13 is pressed against the portion where the protrusion 13 is pressed and extended in the orthogonal direction. Returning to the state before being performed is almost prevented by the plastically deformed portions 19 formed adjacent to each other in the fiber direction. Therefore, the place where the protruding portion 13 is in pressure contact remains on the raw veneer T as a crack 21 spread in the orthogonal direction as shown in FIG.
[0013]
As described above, the length in the orthogonal direction of the raw veneer T that has passed between the rolls 1 and 3 is almost the same as that before the passage at the place pressed by the ring-shaped member 7 (hereinafter referred to as a non-extended place). The portion where the ring-shaped members 9 and 11 are press-contacted (hereinafter referred to as the extended portion) is longer than that before passing.
However, since the elongated extension portion is restricted from being freely extended by the non-elongation portion, the green veneer T as a whole has a center protruding upward, for example, as shown in FIG. It becomes a middle-high shape.
Even if the raw veneer T having such a shape is dried, the shape of the middle and high is not greatly changed. The dried veneer T is used as an intermediate plate, and an adhesive is applied to both sides. For example, a three-ply plywood is manufactured by stacking the back plates and heat-pressing them with a hot press.
Then, the single plate T between the front plate and the back plate is corrected in a state in which the shape of the middle and high is flat, that is, the extended portion is flattened by press contact with hot press, but the extended portion becomes flat. As shown in FIG. 12, the non-extended portion of the single plate T receives a tensile force in the direction of the arrow, that is, in the orthogonal direction.
Therefore, even if there is an overlapped portion 101d as shown in FIG. 18 at the end of the veneer side of the single plate T, the overlapped portions 101b and 101c are displaced due to the tensile force acting in the direction of the arrow. As shown in the figure, there are almost no overlapping parts.
As a result, as described in the above-mentioned prior art, the overlapped portion appears as a streak defect through the front plate, and the product value is less likely to be reduced.
[0014]
In the embodiment of the invention, the apparatus may be modified as follows.
As shown in FIG. 14, the roll 23 is configured in the same manner as the roll 1, and the roll 25 disposed so as to be opposed to the roll 23 is supported so as to be driven and rotated similarly to the roll 3, and a urethane rubber having a thickness of 30 mm on the peripheral surface. 17 is bonded and fixed, but the following configuration is different.
That is, the urethane rubber bonded and fixed to the peripheral surface is cut into a drum shape with a diameter increasing toward the center 25a in the left-right direction in FIG.
In FIG. 14, these dimensions are shown in different proportions than the actual dimensions for easy understanding. For example, when the length of the roll 25 in the left-right direction is 2500 mm, the diameter of the central portion 25a is set to 300 mm, and the diameters at both ends are set. Make it 0.6 mm smaller than the center. Further, the distance between the center of the roll 23 and the roll 25 in the vertical direction in FIG. 14 is 1 mm.
In such a configuration, when the green veneer is inserted between the roll 23 and the roll 25 that are rotationally driven in the orthogonal direction, the action shown in the above embodiment is the center of the green veneer in FIG. And around it and stretched in the orthogonal direction.
On the other hand, the distance between the roll 23 and the roll 25 becomes wider than the central portion as it goes to both ends of the raw veneer in the fiber direction, so that the protrusion 13 and the protrusion 15 press or compress the raw veneer. Becomes smaller, and the amount stretched in the orthogonal direction becomes smaller.
As a result, the raw veneer that has passed between the roll 23 and the roll 25 has a middle-high shape, for example, an upward center, as in the case illustrated in FIG. It is less likely to overlap at the end of the plank side.
In this case, in the roll 23 configured in the same manner as the roll 1, the same effect can be obtained even if the ring-shaped members 7 provided at both ends are omitted.
[0015]
Furthermore, the apparatus in the embodiment of the present invention may be modified as follows.
1. The veneer lace is long, for example, the length in the fiber direction is 6 length, the raw veneer is cut to a length of 1880 mm, dried in this state, divided in the center, and the length in the same direction is 940 mm. In the case of a single plate for a scale, it may be configured as follows.
As shown in FIG. 15, like the roll 1, the ring-shaped members 9 and 11 are alternately provided in the axial center line direction, the ring-shaped member 7 is not used, and the length in the axial center line direction is 2100 mm. 27, a roll 29 having urethane rubber bonded and fixed to the peripheral surface with the same length is used so that a portion 29a of about 580 mm from the left and right ends has a maximum diameter as in the case shown in FIG. It is formed in a drum shape. For example, in the roll 29, the diameter of the portion 29a having the maximum diameter is set to 300 mm, and the diameters at both ends and the central portion in the axial center line direction are reduced by 0.6 mm.
When a raw veneer having a length of 1880 mm in the fiber direction is inserted in the orthogonal direction between the roll 27 and the roll 29 configured and rotated in this way, in the center in the axial center line direction, The portion passing through the maximum diameter portion 29a and its periphery is greatly extended in the orthogonal direction as compared with other portions. That is, the portion of the raw veneer that passes through the portion 29a having the maximum diameter is a portion that is 470 mm away from the center in the fiber direction of the raw veneer, and is cut and divided at the center in the fiber direction after the raw veneer is dried. Then, if two single plates having a length in the direction of 940 mm are formed, the center and the periphery in the fiber direction of each single plate are greatly stretched, and the vicinity of the end portion in the direction is hardly stretched.
Therefore, if these veneers are further cut to a predetermined length in the orthogonal direction, they will be in a mid-high state as in FIG. 11, and even if a plywood is manufactured in the same manner as described above, there will be no overlapping portion at the end of the veneer side of the veneer. is there.
[0016]
2. As a member for forming a portion subjected to compressive plastic deformation on the green veneer, instead of the protrusion 15 shown in FIGS. 6 to 9, the pressing unit continuously has a predetermined length in the fiber direction of the green veneer, for example, about 30 mm. May be a flat protrusion.
3. In the above embodiment, each of the protrusions for spreading the raw veneer in the orthogonal direction and the protrusions for plastic deformation of the raw veneer are provided, but one protrusion has the two functions. As shown in FIG. 17, which is a partially enlarged view of FIGS. 16 and 16.
That is, the roll 31 has a length in the axial center line direction of 130 mm and a diameter of 30 mm, for example, and a large number of cutting blades 33 are formed on the peripheral surface. As shown in FIG. 17, each cutting blade 33 has a blade edge portion 33 a having a length of 2 mm parallel to the axial center line direction of the roll 31, and wide ends at both ends of the blade edge portion 33 a in the axial center line direction. A step portion 33b for pressurization having a length of 1 mm is formed in a notch. The cutting blade 33 is an isosceles triangle whose height in the radial direction from the peripheral surface of the roll 31 is 3.5 mm and whose cross-sectional shape in the direction orthogonal to the blade edge portion 33a is an apex angle of 35 degrees. Similarly, it is formed at a position of 1.8 mm from the circumferential surface in the radial direction.
The shafts 35 at both ends of the roll 31 as described above are rotatably supported by bearings (not shown), and instead of the roll 1 shown in FIG. A large number are arranged in the axial center line direction so that, for example, about 30 mm of both ends can be pressed against the inner part.
When the cutting blade 33 as described above is pressed against the green veneer, the cutting edge portion 33a forms a cut in the green veneer and widens it in the orthogonal direction, while the stepped portion 33b is adjacent to the formed cut. The part is plastically deformed.
Therefore, even if the cutting blade 33 is separated from the green veneer by the rotation of the roll 31 and the roll 17, the state expanded in the orthogonal direction remains almost unrecovered, and the same effect as in the above embodiment can be obtained.
[0017]
As a shape for having the action of spreading the raw veneer in the orthogonal direction with one protrusion and the action of plastic deformation, the following structure may be used.
18 is a front explanatory view of a roll 37 having a projection, FIG. 19 is a partially enlarged explanatory view in a circle S of FIG. 18, and FIG. 20 is a cross-sectional view of the direction of the arrow as viewed from the dashed line CC in FIG. FIGS. 21 and 21 are partial cross-sectional explanatory views as viewed from the direction of the arrow from the one-dot chain line DD in FIG. 19, and FIG. 22 is an explanatory view from the one-dot and dash line EE in FIG.
The roll 37 is configured as follows. The base 39 is a steel columnar member that is rotationally driven by a motor (not shown), and has a width in the axial center line direction of 38 mm and an inner diameter that is substantially equal to the outer diameter of the base 39 and has an outer periphery. A number of ring-shaped members 41a, 41b, 41c,... Which are also made of steel and have a diameter (the diameter of a virtual circle drawn by a tip 45a of a protrusion 45 described later) of 198 mm are mounted and fixed by keys (not shown). . On the peripheral surface 43 of each ring-shaped member 41a, 41b, 41c,..., A protrusion 45 having a notch 45b at the tip is provided as shown in FIGS.
[0018]
That is, in the case of each of the ring-shaped members 41a and 41b, the circumferential surface 43 protrudes in the radial direction and continues in the axial center line direction, and the cross-sectional shape in the direction orthogonal to the axial center line direction is the apex angle, that is, θ3 in FIG. And the protrusions 45 in the radial direction from the peripheral surface 43, that is, L5 = 3.5 mm in FIGS. 20 and 21, are arranged in multiple rows with the interval in the rotation direction, that is, L7 = 7 mm in FIG. It is formed. Further, as shown in FIG. 22, a cutout 45b having a bottom portion 45c with a depth of θ4 = 80 degrees at a depth of L6a = 0.8 mm in the radial direction from the tip 45a by a cutting tool is provided at the tip of the projection 45. By forming a large number of gaps in the direction, that is, L6 = 1.3 mm, an inclined surface from the tip 45a to the bottom 45c is provided as a wide surface.
When the ring-shaped members 41a, 41b, 41c,... Formed with the protrusions 45 as described above are adjacent to each other in the case of the ring-shaped members 41a, 41b, for example, as shown in FIG. The distance L8 in the axial center line direction of 37 is set to 3 mm.
On the other hand, in the rotation direction, the protrusion 45 of the ring-shaped member 41a is provided on the base 39 in a state of being shifted from the protrusion 45 of the ring-shaped member 41b so that the distance L9 is 1.5 mm.
Further, in the ring-shaped members 41b and 41c, the interval in the axial center line direction of the protrusions 45 corresponding to L8 is the same as that of 3mm, but the interval in the rotational direction corresponding to L9 is the same as that of the ring-shaped member 41b. With respect to the protrusion 45, the protrusion 45 of the ring-shaped member 41c is provided on the base 39 in a state shifted by 1.5 mm in the direction opposite to the rotation direction.
Hereinafter, the ring-shaped members 41d are provided with the same amount in the rotation direction and alternately shifted by 1.5 mm in the rotation direction or the direction opposite to the rotation direction for each ring-shaped member.
[0019]
The roll 25 shown in FIG. 14 is arranged relative to the roll 37 having such a protrusion 45, and the urethane rubber provided around the roll 25 is 1 mm at a location 25 a having the maximum diameter of the roll 25. Arrange to bite.
A raw veneer having a thickness of 3 mm, for example, is inserted between the rolls 37 and 25 configured as described above in a direction orthogonal to each other.
Therefore, at the portion of the raw veneer that passes through the portion of the maximum diameter portion 25a and the vicinity thereof, when the protrusion 45 is pressed, the tip 45a of the protrusion 45 bites into the raw veneer so that the raw veneer is orthogonal. When the green veneer is compressed and plastically deformed by the bottom 45c of the protrusion 45, the expanded state hardly returns.
On the other hand, since the action of the projection 45 on the green veneer becomes smaller as the green veneer moves away from the location 25a having the maximum diameter, the green veneer after passing is as shown in FIG.
5. In addition to the plastic deformation in the thickness direction as described above, the tender rising process in which the central portion in the fiber direction is stretched more greatly in the direction perpendicular to the both ends of both ends in the same direction can be performed in addition to the plastic deformation in the thickness direction as described above. A tensile force may be applied at least until plastic deformation occurs.
6. The tender rising process in which the center part of the raw veneer in the fiber direction is greatly stretched in the direction perpendicular to the fiber direction as compared to the end edge side of both ends in the same direction. You may go to the edge side.
[0020]
【The invention's effect】
As described above, according to the present invention, the veneers partially overlap, so that the obtained plywood or the like has a streak defect through the face plate and hardly reduces the commercial value.
[Brief description of the drawings]
FIG. 1 is a partial front view of an embodiment of the invention.
2 is an enlarged explanatory view of a portion surrounded by a circle A in FIG.
3 is an explanatory cross-sectional view of the direction of the arrow as viewed from the alternate long and short dash line EE in FIG. 2. FIG.
4 is a cross-sectional explanatory view of the direction of the arrow as viewed from the alternate long and short dash line FF in FIG. 2;
FIG. 5 is an explanatory view of the direction of the arrow as viewed from the alternate long and short dash line GG in FIG. 2;
6 is an enlarged explanatory view of a portion surrounded by a circle B in FIG. 1. FIG.
7 is a cross-sectional explanatory view when viewed in the direction of the arrow from the alternate long and short dash line HH in FIG. 6;
8 is an explanatory cross-sectional view of the direction of the arrow as viewed from the alternate long and short dash line JJ in FIG. 6;
9 is an explanatory view of the direction of the arrow as viewed from the alternate long and short dash line KK in FIG. 6;
10 is a partially enlarged explanatory view of the surface of a raw veneer T. FIG.
11 is a perspective view of the entire raw veneer T. FIG.
12 is an overall perspective view of a single plate T. FIG.
13 is a partially enlarged explanatory view of a single plate T. FIG.
FIG. 14 is an explanatory diagram of a modification of the embodiment of the invention.
FIG. 15 is an explanatory diagram of a modification of the embodiment of the invention.
FIG. 16 is a front explanatory view of a modification of the embodiment of the present invention.
FIG. 17 is a partially enlarged explanatory view of FIG. 16;
FIG. 18 is a front explanatory view of a modified example of the embodiment of the present invention.
FIG. 19 is a partially enlarged explanatory diagram of a circle S in FIG.
20 is a cross-sectional explanatory view of the direction of the arrow as viewed from the alternate long and short dash line CC in FIG. 19;
21 is a partial cross-sectional explanatory view of the direction of the arrow as viewed from the alternate long and short dash line DD in FIG. 19;
22 is an explanatory view of the direction of the arrow as viewed from the alternate long and short dash line E-E in FIG. 19;
FIG. 23 is an enlarged explanatory view of a conventional single plate.
[Explanation of symbols]
1. ・ Roll 3 ・・ Roll 7 ・・ Ring member 9 ・・ Ring member 11 ・ Ring member 13 ・・ Protrusion 15 ・・ Protrusion 17 ・ Urethane rubber

Claims

テンダーライジング加工により、繊維方向の中央部が同方向の両木口端縁側に比べて繊維方向と直交する方向により大きく引き伸ばされていて表裏一方側に中高状態とした未乾燥ベニヤ単板。An undried veneer veneer in which the center in the fiber direction is greatly stretched in the direction perpendicular to the fiber direction as compared with both ends in the same direction by the tender rising process, and the front and back sides are in a middle-high state.

厚さ方向に貫通しベニヤ単板の木口端縁と交差する方向に任意長さで連続する塑性変形された割れが、両木口端縁から各々内側の所定距離の箇所を除いて、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成されていて表裏一方側に中高状態とした未乾燥ベニヤ単板。A plastically deformed crack that penetrates in the thickness direction and continues at an arbitrary length in a direction intersecting the end edge of the veneer veneer, except for a predetermined distance inside each end of both ends, the end of the end An undried veneer veneer that is formed in large numbers at appropriate intervals in a direction parallel to the edge and in a direction perpendicular to the edge, and is in a middle-high state on one side of the front and back.

厚さ方向に圧縮塑性変形された箇所が、ベニヤ単板の両木口端縁から各々内側の所定距離の箇所を除いて、多数形成されていて表裏一方側に中高状態とした未乾燥ベニヤ単板。Non-dried veneer veneer that has been formed in large numbers on the front and back sides of the veneer veneer, except for a predetermined distance inside the veneer veneer edge, both of which are compressed and plastically deformed in the thickness direction. .

厚さ方向に貫通しベニヤ単板の木口端縁と交差する方向に任意長さで連続する割れが、両木口端縁から各々内側の所定距離の箇所を除いて、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成されており、更には前記所定距離の箇所を除いて、前記木口端縁と直交する方向で隣り合う前記割れの間には、厚さ方向に圧縮塑性変形された箇所が形成されていて表裏一方側に中高状態とした未乾燥ベニヤ単板。A crack that penetrates in the thickness direction and continues at an arbitrary length in the direction intersecting with the edge of the veneer veneer is parallel to the edge of the mouth except for a predetermined distance inside each edge of both ends. A large number are formed at appropriate intervals in the direction and the direction orthogonal to each other, and in the thickness direction between the cracks adjacent to each other in the direction orthogonal to the edge of the mouth, except for the predetermined distance. An undried veneer veneer in which a portion subjected to compressive plastic deformation is formed and is in a middle-high state on one side of the front and back.

両木口端縁から各々内側の所定距離の箇所を除いて未乾燥ベニヤ単板に、厚さ方向に貫通しベニヤ単板の木口端縁と交差する方向に任意長さで連続する塑性変形された割れを、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて、多数形成する未乾燥ベニヤ単板の加工方法。The plastic veneer veneer veneer was continuously plastically deformed in an arbitrary length in the direction crossing the veneer veneer veneer edge, passing through the thickness veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer. A method for processing an undried veneer veneer in which a large number of cracks are formed at appropriate intervals in a direction parallel to and perpendicular to the edge of the end of the mouth.

両木口端縁から各々内側の所定距離の箇所を除いて未乾燥ベニヤ単板に、厚さ方向に圧縮塑性変形された箇所を、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて、多数形成する未乾燥ベニヤ単板の加工方法。Except for a predetermined distance on the inner side from both ends of the both ends, the undried veneer veneer is placed at an appropriate interval in a direction parallel to and perpendicular to the end edge of the plastic veneer. And processing a plurality of undried veneer veneers.

両木口端縁から各々内側の所定距離の箇所を除いて未乾燥ベニヤ単板に、厚さ方向に貫通しベニヤ単板の木口端縁と交差する方向に任意長さで連続する割れが、前記木口端縁と平行な方向及び直交する方向に適宜間隔をおいて多数形成し、更には前記所定距離の箇所を除いて、前記木口端縁と直交する方向で隣り合う前記割れの間には、厚さ方向に圧縮塑性変形された箇所を形成する未乾燥ベニヤ単板の加工方法。The cracks that pass through the thickness direction of the veneer veneer, except for a predetermined distance from the inner edge of both ends, are continuous in an arbitrary length in the direction intersecting the end edge of the veneer veneer, A large number of appropriate intervals are formed in a direction parallel to and perpendicular to the edge of the mouth end, and except for the predetermined distance, between the cracks adjacent in the direction perpendicular to the edge of the mouth end, A method for processing an undried veneer veneer that forms a portion subjected to compression plastic deformation in the thickness direction.

軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面にはベニヤ単板を繊維方向と直交する方向に広げる突起部及びベニヤ単板を圧縮塑性変形させる突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送されるベニヤ単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成されている未乾燥ベニヤ単板の加工装置。In a pair of rolls arranged so that the axial center line is parallel, on the peripheral surface of one roll, there are a large number of protrusions that spread the veneer veneer in a direction perpendicular to the fiber direction and protrusions that compressively plastically deform the veneer veneer. The other roll is formed in a drum shape so that the portion of the veneer veneer that is transported between the pair of rolls in the direction perpendicular to the fiber direction passes through the central portion in the fiber direction has a maximum diameter. The machine for processing undried veneer veneer.

軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面にはベニヤ単板を繊維方向と直交する方向に広げ且つベニヤ単板を圧縮塑性変形させる突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送されるベニヤ単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成されている未乾燥ベニヤ単板の加工装置。In a pair of rolls arranged so that the axial center line is parallel, the peripheral surface of one roll is provided with a plurality of protrusions that spread the veneer single plate in a direction perpendicular to the fiber direction and compressively plastically deform the veneer single plate, The other roll is formed in a drum shape so that the portion of the veneer veneer that is conveyed between the pair of rolls in a direction orthogonal to the fiber direction passes through the central portion in the fiber direction has a maximum diameter. Processing equipment for undried veneer veneer.

軸中心線を平行として配置された一対のロールにおいて、一方のロールの周面にはベニヤ単板を繊維方向と直交する方向に広げる鋭利な先端とベニヤ単板を圧縮塑性変形させる幅広の面とを有する突起部を多数を設け、他方のロールは、繊維方向と直交する方向に一対のロールの間を搬送されるベニヤ単板の該繊維方向の中央部が通過する部分が、最大直径となるように太鼓状に形成されている未乾燥ベニヤ単板の加工装置。In a pair of rolls arranged so that the axial center line is parallel, a sharp tip that widens the veneer veneer in a direction orthogonal to the fiber direction and a wide surface that compresses and plastically deforms the veneer veneer on the peripheral surface of one roll The portion of the other roll that passes through the center portion in the fiber direction of the veneer veneer conveyed between the pair of rolls in a direction orthogonal to the fiber direction has a maximum diameter. A processing device for an undried veneer veneer formed like a drum like this.