JP2005037417A - Method and apparatus for bonding polarizing plate - Google Patents

Method and apparatus for bonding polarizing plate Download PDF

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Publication number
JP2005037417A
JP2005037417A JP2003180784A JP2003180784A JP2005037417A JP 2005037417 A JP2005037417 A JP 2005037417A JP 2003180784 A JP2003180784 A JP 2003180784A JP 2003180784 A JP2003180784 A JP 2003180784A JP 2005037417 A JP2005037417 A JP 2005037417A
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Japan
Prior art keywords
film
substrate
polarizing plate
strip
belt
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JP2003180784A
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Japanese (ja)
Inventor
Takayuki Kanbara
隆之 神原
Naoki Sakai
直喜 坂井
Ryoichi Sugihara
了一 杉原
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Fujifilm Holdings Corp
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Fuji Photo Film Co Ltd
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Priority to JP2003180784A priority Critical patent/JP2005037417A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for bonding polarizing plates with which the polarizing plates are simultaneously bonded to both surfaces of a substrate. <P>SOLUTION: Two strip-shaped films, each composed of the polarizing plate and a release film bonded to the polarizing plate, and supplied to the substrate from both surface directions thereof are cut so as to sever the polarizing plates and adhesive layers corresponding to the length of the substrate, while leaving the release films uncut. The release films are separated from the respective two film pieces thus severed. The tacky surface of the one film piece is bonded to the corresponding front surface of the substrate and the tacky surface of the other film piece is bonded to the corresponding rear surface of the substrate. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、基板に偏光板を貼合する偏光板貼合方法及び装置に関する。
【０００２】
【従来の技術】
液晶表示装置（以下、ＬＣＤ）の普及に伴い、偏光板の需要が急増している。偏光板フィルムは、一般に偏光能を有する偏光層の両面あるいは片面に、保護フィルムを貼り合わせられている（図１２（Ｂ）参照）。偏光層の素材としてはポリビニルアルコール（以下、ＰＶＡ）が主に用いられており、ＰＶＡフィルムを一軸延伸してから、ヨウ素あるいは二色性染料で染色するかあるいは染色してから延伸し、さらにホウ素化合物で架橋することにより偏光層用の偏光膜が形成される。保護フィルムとしては、光学的に透明で複屈折が小さいことから、主に三酢酸セルロース（以下、ＴＡＣ）が用いられている。偏光板は、通常、長手方向に延伸されるため、偏光膜の吸収軸は長手方向にほぼ平行となる（図１２（Ａ）参照）。偏光板フィルムには、基板上に貼合するための接着剤層が設けられていて、その上には当該接着剤層をホコリなどの異物から保護するための剥離フィルムが貼合されている。剥離フィルムが貼合された偏光板フィルムは、長手方向に延伸された帯状フィルムをロール形態として供給される。
【０００３】
従来のＴＮ（Ｔｗｉｓｔｅｄ Ｎｅｍａｔｉｃ）液晶を用いたＬＣＤにおいては、基板の両面に偏光板が貼合されたものが用いられており、一方の面には画面の縦あるいは横方向に対して偏光板の透過軸を４５゜傾けた第１の偏光板が配置されるとともに、他方の面には第１の偏光板の透過軸に対し直交する方向に透過軸を傾けた第２の偏光板が配置される。このため、ロール形態の偏光板をロール長手方向に対し４５゜方向に予め打ち抜いた偏光板チップを透過軸方向を合わせて一枚一枚ＬＣＤの両面に貼合する方法（例えば、特開２００２−２３１５１号公報）や、ロール形態の偏光板をロール長手方向に対しＬＣＤ画面の縦あるいは横方向を４５゜傾けて貼合した後に偏光板を切断する方法（例えば、特開平１１−９５０２８号公報、図１２（Ａ）参照）が案出されている。また、ＶＡ（Ｖｅｒｔｉｃａｌ Ａｌｉｇｎｍｅｎｔ）液晶を用いたＬＣＤやＩＰＳ（Ｉｎ Ｐｌａｎｅ Ｓｗｉｔｃｈｉｎｇ）方式液晶を用いたＬＣＤにおいては、偏光板の透過軸を画面の縦又は横方向に配置しており、偏光板片を一枚一枚ＬＣＤに貼合している。
【０００４】
【特許文献１】
特開２００２−２３１５１号公報
【特許文献２】
特開平１１−９５０２８号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、偏光板チップを一枚一枚ＬＣＤに貼合する方法の場合、かかる偏光板チップを基板に貼合する際に、貼合の直前に偏光板チップの一枚一枚を移載、剥離フィルムの剥離等する必要があるため、工程時間を短縮するにも限界がある。また、偏光板チップは、通常、ロール形態の偏光板フィルムから打ち抜かれたものであるため、巻き癖が発生し易く、偏光板チップを移載したり搬送する際の作業性が悪い。さらに、偏光板チップを一枚一枚ＬＣＤに貼合する場合、ＬＣＤの片側面が吸着支持されていることが多いため、両面に貼合される偏光板チップの透過軸の方向を合わせてＬＣＤの両面に同時に偏光板チップを貼合することが困難である。
【０００６】
また、偏光板をロール長手方向に対しＬＣＤ画面の縦あるいは横方向を４５゜傾けて貼合した後に偏光板を切断する方法の場合、ロールの端付近で使用できない部分が多く発生する。特に、ＬＣＤの大画面化に伴って大サイズの偏光板を用いると、得率が小さくなるという問題がある。また、貼合わせに用いられなかった偏光板の切れ端は複数の材料が複合して使用されているため再利用が難しく、結果として廃棄物が増えるという問題がある。このような問題は、偏光板チップを一枚一枚ＬＣＤに貼合する方法の場合にも共通する問題である。また、偏光板をロール長手方向に対しＬＣＤ画面の縦あるいは横方向を４５゜傾けて貼合する場合、ＬＣＤの角度を一定に保つためのキャリアが必要となるため、偏光板の透過軸を基板の両面に同時に連続的に偏光板を貼合させることが困難である。さらに、基板の片面を貼合したのちに反対側の面を貼合する場合にも、第１のキャリアから第２のキャリアに載せ変える際にも角度の調整が必要になるため、自動化するにも複雑な機構が必要となる。
【０００７】
ところで、着色防止や視野角拡大等の光学補償などを目的として、位相差膜は、ＬＣＤを形成する偏光板等に接着して用いられ、偏光板の透過軸に対し配向軸を種々の角度で設定することが求められる。従来は、縦または横一軸延伸したフィルム（例えば、ＰＥＴ）より、その配向軸が辺に対して所定の傾斜角度となるように周辺を打ち抜いて裁断する方式がとられており、偏光板同様に得率の低下が問題となっていた。
【０００８】
本発明の第１の目的は、基板の両面に偏光板を同時に貼合することができる偏光板貼合方法及び装置を提供することである。
【０００９】
本発明の第２の目的は、作業効率が高い偏光板貼合方法及び装置を提供することである。
【００１０】
本発明の第３の目的は、偏光板の得率の高い偏光板貼合方法及び装置を提供することである。
【００１１】
本発明の第４の目的は、位相差膜と偏光板を貼り合わせた複合フィルムの得率の高い偏光板貼合方法及び装置を提供することである。
【００１２】
【課題を解決するための手段】
本発明の第１の視点においては、基板に偏光板を貼合する偏光板貼合装置であって、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、が、その長手方向に対し直交する進行方向側の切断面が基板に対応する長さまでそれぞれ進行したときに、前記第１の帯状フィルム及び前記第２の帯状フィルムをそれぞれ前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する切断手段と、前記第１の帯状フィルムの前記切断により切り出された第１のフィルム片及び前記第２の帯状フィルムの前記切断により切り出された第２のフィルム片のそれぞれから前記剥離フィルムを分離する剥離フィルム分離手段と、前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する裏側の板面に貼合する貼合手段と、を備えることを特徴とする。
【００１３】
本発明の第２の視点においては、基板に偏光板を貼合する偏光板貼合装置であって、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、のそれぞれから前記剥離フィルムを分離する剥離フィルム分離手段と、前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する裏側の板面に貼合する貼合手段と、前記貼合手段によって前記基板の両面に貼合された前記第１の帯状フィルム及び前記第２の帯状フィルムのそれぞれを、前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する切断手段と、を備えることを特徴とする。
【００１４】
本発明の第３の視点においては、基板に偏光板を貼合する偏光板貼合装置であって、基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、偏光板を有する第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記第１の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、前記基板の対応する板面片側に貼合する第１の貼合手段と、前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記第２の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、前記基板の対応する前記第１のフィルム片が貼合された面と反対側の板面に貼合する第２の貼合手段と、を備えることを特徴とする。
【００１５】
本発明の第４の視点においては、基板に偏光板を貼合する偏光板貼合装置であって、基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、偏光板を有する第１の帯状フィルムの接着面が、前記第１の帯状フィルムの進行方向が前記第１の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、対応する板面片側に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第１の切断手段と、前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムの接着面が、前記第２の帯状フィルムの切断面が前記第２の搬送手段のライン上で搬送される基板の進行方向側の端面と平行になるように、対応する前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第２の切断手段と、を備えることを特徴とする。
【００１６】
本発明の第５の視点においては、基板に偏光板を貼合する偏光板貼合方法であって、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、が、その長手方向に対し直交する進行方向側の切断面が基板に対応する長さまでそれぞれ進行したときに、前記第１の帯状フィルム及び第２の帯状フィルムをそれぞれ前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する工程と、前記第１の帯状フィルムの前記切断により切り出された第１のフィルム片及び前記第２の帯状フィルムの前記切断により切り出された第２のフィルム片のそれぞれから前記剥離フィルムを分離する工程と、前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する裏側の板面に貼合する工程と、を含むことを特徴とする。
【００１７】
本発明の第６の視点においては、基板に偏光板を貼合する偏光板貼合方法であって、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、のそれぞれから前記剥離フィルムを分離する工程と、前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する裏側の板面に貼合する工程と、前記貼合手段によって前記基板の両面に貼合された前記第１の帯状フィルム及び前記第２の帯状フィルムのそれぞれを、前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、を含むことを特徴とする。
【００１８】
本発明の第７の視点においては、基板に偏光板を貼合する偏光板貼合方法であって、基板の一つの端面を進行方向に対し直交させて前記基板を搬送する工程と、偏光板を有する第１のフィルム片の接着面を、前記第１のフィルム片の切断面が基板の搬送方向の前方側の端面と平行になるように、前記基板の対応する板面片側に貼合する工程と、搬送されてきた前記基板をその搬送方向に対し直交する方向に変更して搬送する工程と、偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２のフィルム片の接着面を、前記第２のフィルム片の切断面が基板の搬送方向の前方側の端面と平行になるように、前記基板の対応する前記第１のフィルム片が貼合された面と反対側の板面に貼合する工程と、を含むことを特徴とする。
【００１９】
本発明の第８の視点においては、基板に偏光板を貼合する偏光板貼合方法であって、基板の一つの端面を進行方向に対し直交させて前記基板を搬送する工程と、偏光板を有する第１の帯状フィルムの接着面が、前記第１の帯状フィルムの進行方向が前記基板の搬送方向の前方側の端面と平行になるように、対応する板面片側に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、搬送されてきた前記基板をその搬送方向に対し直交する方向に変更して搬送する第２の搬送工程と、偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記基板の前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムの接着面が、前記第２の帯状フィルムの切断面が前記基板の搬送方向の前方側の端面と平行になるように、対応する前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、を含むことを特徴とする。
【００２０】
【発明の実施の形態】
本発明の実施形態１について図面を用いて説明する。図１は、本発明の実施形態１に係る偏光板貼合装置の構成を模式的に示した側面図である。図２は、本発明の実施形態１に係る偏光板貼合装置において用いられる帯状フィルムの構成を示した（Ａ）平面図及び（Ｂ）断面図である。図３は、本発明の実施形態１に係る偏光板貼合装置によって基板両面に貼合される偏光板の延伸方向と基板の関係を模式的に示した展開斜視図である。
【００２１】
実施形態１に係る偏光板貼合装置３０では、図１を参照すると、偏光板上に接着剤層を介して剥離フィルム１１Ａが貼着されるとともに、搬送される基板１の表側の板面側から供給される第１の帯状フィルム１０Ａがその長手方向に対し直交する進行方向側の切断面が基板１に対応する長さまで進行したときに、前記第１の帯状フィルム１０Ａを前記剥離フィルム１１Ａを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第１の切断手段３１Ａと、偏光板上に接着剤層を介して剥離フィルム１１Ｂが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム１１Ｂ側と前記第１の帯状フィルム１０Ａの剥離フィルム１１Ａ側とを合わせたときの前記第１の帯状フィルム１０Ａの偏光板の透過軸方向と直交し、かつ、搬送される前記基板１の裏側の板面側から供給される第２の帯状フィルム１０Ｂがその長手方向に対し直交する進行方向側の切断面が基板１に対応する長さまで進行したときに、前記第２の帯状フィルム１０Ｂを前記剥離フィルム１１Ｂを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第２の切断手段３１Ｂと、前記第１の切断手段３１Ａにより前記第１の帯状フィルム１０Ａから切り出された第１のフィルム片１９Ａから前記剥離フィルム１１Ａを分離する第１の剥離フィルム分離手段３２Ａと、前記第２の切断手段３１Ｂにより前記第２の帯状フィルム１０Ｂから切り出された第２のフィルム片１９Ｂから前記剥離フィルム１１Ｂを分離する第２の剥離フィルム分離手段３２Ｂと、前記剥離フィルム１１Ａが分離された前記第１のフィルム片１９Ａの接着面を、前記第１のフィルム片１９Ａの切断面が前記基板１の搬送方向の前方側の端面と平行になるように、当該基板１の対応する表側の板面に貼合するとともに、前記剥離フィルム１１Ｂが分離された前記第２のフィルム片１９Ｂの接着面を、前記第２のフィルム片１９Ｂの切断面が前記基板１の搬送方向の前方側の端面と平行になるように、当該基板１の対応する裏側の板面に貼合する貼合手段３３と、を備える。これにより、偏光板を基板の両面に同時かつ連続的に自動貼合することができるとともに、偏光板の得率を１００％にすることができる。また、同種類の巻出ロールを２つ用いることにより両面に貼合される偏光板の透過軸方向を互いに交差させて貼合させることができる。
【００２２】
本発明において適用される帯状フィルム（図１の１０Ａ、１０Ｂ）は、図２（Ｂ）を参照すると、偏光板１６に接着剤層１４、１２（位相差膜１３）を介して剥離フィルム１１が貼着されたものを用いたフィルムである。偏光板１６は、ＴＮ液晶用のＬＣＤに用いる場合、フィルム長手方向に対し透過軸方向が斜めに配向されたものであるが、フィルム長手方向と透過軸方向の傾斜角が２０°以上かつ７０°以下であることが好ましいが、より好ましくは４０°以上かつ５０°以下であり、通常は４５°である（図２（Ａ）参照）。このような偏光板の製造方法については、特開２００２−８６５５４号公報を参照されたい。偏光板１６は、その両面に保護フィルム１５、１７を貼り合わせることが好ましい。ここでの偏光板１６は、フィルム長手方向に対し斜めに延伸された偏光板が用いられるので、以下、「斜め延伸偏光板」ということにする。斜め延伸偏光板１６を用いれば、連続的なフィルムの供給が可能となる。また、第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂは、第１の帯状フィルム１０Ａの剥離フィルム１１Ａ側と第２の帯状フィルム１０Ｂの剥離フィルム１１Ｂ側とを合わせたときに、第１の帯状フィルム１０Ａの偏光板の透過軸方向と第２の帯状フィルム１０Ｂの偏光板の透過軸方向とが直交するような組み合わせで用いられ、例えば、第１の帯状フィルム１０Ａについて長手方向に対し偏光板の透過軸方向が７０°に配向するものを用いる場合、第２の帯状フィルム１０Ｂについて長手方向に対し偏光板の透過軸方向が２０°に配向するものを用いることができる。また、第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂ（第１のフィルム片１９Ａ及び第２のフィルム片１９Ｂ）は、それぞれの接着面側から見たときの斜め延伸方向（透過軸方向）が４５°で同じものを用いることが好ましい（図３参照）。斜め延伸方向の同じものを用いることで、基板１の両面に偏光板を貼合したときに透過軸方向を交差させることができるからである。なお、ＶＡ液晶用のＬＣＤやＩＰＳ方式液晶用のＬＣＤに用いる場合、偏光板１６は、フィルム長手方向に対し偏光板の透過軸方向が平行又は直角に配向されたものを用いることができ、例えば、第１の帯状フィルム１０Ａについて長手方向に対し偏光板の透過軸方向が平行に配向するものを用いる場合、第２の帯状フィルム１０Ｂについて長手方向に対し偏光板の透過軸方向が直角に配向するものを用いることができる。
【００２３】
斜め延伸偏光板１６（保護フィルム１５）に接着剤層１４を介して位相差膜１３を貼り合わせた円偏光フィルムの場合、位相差膜１３は、フィルム長手方向に対し直交又は平行な配向軸を有するものを用いることが好ましい。このようにすれば、円偏光フィルムを連続的に供給できる。円偏光フィルムの場合、第１の帯状フィルム（図１の１０Ａ）の位相差膜の配向軸がフィルム長手方向と平行であれば、第２の帯状フィルム（図１の１０Ｂ）の位相差膜の配向軸はフィルム長手方向と直交するものとなる。
【００２４】
偏光板１６の厚さは、特に限定されないが、例えば、５〜１００μｍ程度である。偏光板１６の幅は、貼合される基板のサイズに応じて適宜選択される。第１の帯状フィルム（図１の１０Ａ）と第２の帯状フィルム（図１の１０Ｂ）は、それぞれ同じ幅のものを用いることができる。接着剤１２、１６は、基板と光学フィルムとの貼合に用いられる通常の接着剤（例えば、アクリル系接着剤、ポリウレタン系接着剤、エポキシ系接着剤、ゴム系接着剤など）であればよい。剥離フィルム１１は、剥離材であり、光学フィルムに用いられる通常の剥離材（例えば、ポリエチレンテレフタレートフィルム、ポリエステルフィルムなど）であればよい。偏光板の剥離フィルム１１が貼着された面と対向する面側には、フィルムの表面をキズなどから保護するために合紙１８を貼着させてもよい。帯状フィルム１０Ａ、１０Ｂは、巻出ロール３４Ａ、３４Ｂから供給されることが好ましい（図１参照）。
【００２５】
基板１は、液晶表示装置、プラズマ表示装置などの表示装置に用いられるガラス基板、合成樹脂基板などの平板状部材であり、予め液晶セル、電極などの構成部品が形成された基板であってもよい。基板１の形状は、正方形、長方形などの略方形が好ましい（図１及び図２（Ａ）参照）。
【００２６】
第１の切断手段３１Ａ及び第２の切断手段３１Ｂは、光学フィルムの通常の切断に用いられる押し切り型カッター、ダイシング型カッターなどであり、例えば、カッター刃、カッター刃を駆動するシリンダ、カッター刃の下死点位置を調整する下死点位置調整部材を備えるものが挙げらる。下死点位置を剥離フィルム１１の厚さの０倍以上０．５倍以下に調整することで、剥離フィルム１１（厚さ１０〜５０μｍ以下）を残して帯状フィルム１０の他の層（偏光板、接着剤層など）をフィルム長手方向に対し直交する方向に切断（以下、ハーフカットという）することができる（図１参照）。
【００２７】
第１の剥離フィルム分離手段３２Ａ及び第２の剥離フィルム分離手段３２Ｂは、フィルム片１９Ａ、１９Ｂから剥離フィルム１１Ａ、１１Ｂを分離させる手段であり（図１参照）、例えば、ローラ、くさび部材を挙げることができる。
【００２８】
なお、フィルム片１９Ａ、１９Ｂから分離された剥離フィルム１１Ａ、１１Ｂは、巻取ロール３５Ａ、３５Ｂに巻き取って回収すればよい（図１参照）。
【００２９】
貼合手段３３は、剥離フィルム１１Ａ、１１Ｂが分離された２つのフィルム片１９Ａ、１９Ｂの接着面を、搬送手段３６によって搬送される基板の搬送方向の先端側の端面と各フィルム片１９Ａ、１９Ｂの切断面が平行になるように、当該基板１の対応する位置に同時に貼合させる手段であり（図１参照）、例えば、基板両面から押圧するニップローラ（ゴムローラ、金属ローラ）が挙げられる。ローラの場合、硬度６０〜８０°の２本のゴムロールの組合せ、又は、硬度６０〜８０°の１本のゴムロールと金属ロールの組合せとすることが好ましい。貼合する際のローラのニップ圧は、１ｋｇ／ｃｍ以下の線圧とすることが好ましい。
【００３０】
搬送手段３６は、配列した複数のローラ若しくはホイール上で水平に基板１を搬送するローラコンベア若しくはホイールコンベアであることが好ましいがさらに好ましくは、ローラ外筒又はホイールが軸受を介して回転する軸に取り付けられていることで、搬送中の基板の速度に一致した表面速度でローラ外筒又はホイールが回転してローラ外筒又はホイールと基板間で滑ることによって生じる基板の傷の発生を防ぐことが好ましい。
【００３１】
次に、本発明の実施形態２について図面を用いて説明する。図４は、本発明の実施形態２に係る偏光板貼合装置の構成を模式的に示した側面図である。図５は、本発明の実施形態１に係る偏光板貼合装置によって基板両面に貼合される偏光板の延伸方向と基板の関係を模式的に示した展開斜視図である。
【００３２】
実施形態２に係る偏光板貼合装置４０は、図４を参照すると、偏光板上に接着剤層を介して剥離フィルム１１Ａが貼着されるとともに、搬送される基板１の表側の板面側から供給される第１の帯状フィルム１０Ａから前記剥離フィルム１１Ａを分離する第１の剥離フィルム分離手段４１Ａと、偏光板上に接着剤層を介して剥離フィルム１１Ｂが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム１１Ｂ側と前記第１の帯状フィルム１０Ａの剥離フィルム１１Ａ側とを合わせたときの前記第１の帯状フィルム１０Ａの偏光板の透過軸方向と直交し、かつ、搬送される前記基板１の裏側の板面側から供給される第２の帯状フィルム１０Ｂから前記剥離フィルム１１Ｂを分離する第２の剥離フィルム分離手段４１Ｂと、前記剥離フィルム１１Ａが分離された前記第１の帯状フィルム１０Ａの接着面を、前記第１の帯状フィルム１１Ａの進行方向が前記基板１の搬送方向と対応するように、当該基板１の対応する表側の板面に貼合するとともに、前記剥離フィルム１１Ｂが分離された前記第２の帯状フィルム１０Ｂの接着面を、前記第２の帯状フィルム１０Ｂの進行方向が前記基板１の搬送方向と対応するように、当該基板１の対応する裏側の板面に貼合する貼合手段４２と、前記貼合手段４２によって前記基板１の両面に貼合された前記第１の帯状フィルム１０Ａ及び前記第２の帯状フィルム１０Ｂを、前記基板１の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する切断手段４３と、を備える。これにより、基板の搬送を停止させることなく偏光板を基板の両面に同時かつ連続的に自動貼合することができるとともに、偏光板の得率を１００％にすることができる。また、同種類の巻出ロールを２つ用いることにより両面に貼合される偏光板の透過軸方向を互いに交差させて貼合させることができる。
【００３３】
実施形態２に係る偏光板貼合装置４０の剥離フィルム分離手段４１Ａ、４１Ｂ、貼合手段４２、巻出ロール４４Ａ、４４Ｂ、巻取ロール４５Ａ、４５Ｂ及び搬送手段４６は（図４参照）、それぞれ実施形態１に係る偏光板貼合装置の剥離フィルム分離手段３２Ａ、３２Ｂ、貼合手段３３、巻出ロール３４Ａ、３４Ｂ、巻取ロール３５Ａ、３５Ｂ及び搬送手段３６とほぼ同様である（図１参照）。実施形態２に係る偏光板貼合装置４０において用いる基板１及び帯状フィルム１０Ａ、１０Ｂは、実施形態２において用いるものと同様である。実施形態２に係る偏光板貼合装置４０の切断手段４３の位置は、実施形態１に係る偏光板貼合装置との切断手段と異なる。なお、図４の貼合手段４２においては、フィルム片ではなく切断していない帯状フィルム１０Ａ、１０Ｂを基板１の両面に貼合している点で異なる。
【００３４】
図４の搬送手段４６においては、貼合手段４２より下流側の搬送ライン上に切断手段４３を有する。貼合手段４２より上流側の搬送手段４６上では、少なくとも貼合するときまでに基板１の搬送方向の端面が当接して搬送されていることが好ましい。偏光板の得率を高めることができるからである。
【００３５】
図４の切断手段４３は、貼合手段４２によって基板１の両面に貼合された第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂそれぞれを、基板１の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する。ここでは、第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂには剥離フィルム１１Ａ、１１Ｂが貼着されていないので、ハーフカットではなく、第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂの全体をほぼ同時に切断する。
【００３６】
第１の帯状フィルム１０Ａ及び第２の帯状フィルム１０Ｂは、それぞれの接着面側から見たときの斜め延伸方向（透過軸方向）の同じものを用いることが好ましい（図５参照）。斜め延伸方向の同じものを用いることで、基板１の両面に偏光板を貼合したときに透過軸方向を交差させることができるからである。
【００３７】
本発明の実施形態３について図面を用いて説明する。図６は、本発明の実施形態３に係る偏光板貼合装置の構成を概略的に示した斜視図である。図７は、本発明の実施形態３に係る偏光板貼合装置の構成を模式的に示した平面図である。図８は、本発明の実施形態３に係る偏光板貼合装置の第１の搬送部の構成を模式的に示した側面図である。図９は、本発明の実施形態３に係る偏光板貼合装置の第２の搬送部の構成を模式的に示した側面図である。
【００３８】
図６を参照すると、実施形態３に係る偏光板貼合装置は、大きく第１の搬送部、反転部、第２の搬送部に分けることができる。第１の搬送部では、供給部から供給された基板（図７の１Ａ）が搬送され、巻出ロールから巻き出された偏光板を所定長さでハーフカットして剥離フィルムを分離して、カットされた偏光板が基板（図７の１Ｂ）の下側片面に貼合される。反転部では、第１の搬送部から搬送されてきた基板（偏光板が下側片面に貼合された基板；図７の１Ｂ）を、反転後の前記基板の進行方向側の端面が進行方向に対して直交するように、上下反転させ、反転した基板（偏光板が上側片面に貼合された基板；図７の１Ｃ）を第２の搬送部に送る。第２の搬送部では、反転部から送られてきた基板（偏光板が上側片面に貼合された基板；図７の１Ｄ）が第１の搬送部で搬送される基板の方向と直交する方向に搬送され、巻出ロールから巻き出された偏光板を所定長さでハーフカットして剥離フィルムを分離して、カットされた偏光板が基板（偏光板が両面に貼合された基板；図７の１Ｅ）の下側片面に貼合される。
【００３９】
実施形態３に係る偏光板貼合装置の構成について図８及び図９を用いて詳細に説明すると、偏光板貼合装置５０は、基板１の一つの端面を進行方向に対し直交させて前記基板１を搬送する第１の搬送手段５１Ａと、偏光板上に接着剤層を介して剥離フィルム１１Ａが貼着された第１の帯状フィルム１０Ａがその長手方向に対し直交する進行方向側の切断面が前記基板１に対応する長さまで進行したときに、前記第１の帯状フィルム１０Ａを前記剥離フィルム１１Ａを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第１の切断手段５２Ａと、前記第１の切断手段５２Ａの切断により切り出された第１のフィルム片１９Ａから前記剥離フィルム１１Ａを分離する第１の剥離フィルム分離手段５３Ａと、前記剥離フィルム１１Ａが分離された前記第１のフィルム片１９Ａの接着面を、前記第１の搬送手段５１Ａによって搬送される基板１の進行方向の前方側の端面と前記第１のフィルム片１９Ａの切断面が平行になるように、当該基板１の対応する板面片側に貼合する第１の貼合手段５４Ａと、前記第１の搬送手段５１Ａによって搬送されてきた前記第１のフィルム片１９Ａが貼合された前記基板１を、反転後の前記基板１の進行方向側の端面が進行方向に対して直交するように、上下反転させる反転手段５５と、前記第１の搬送手段５１Ａによって搬送されてきた前記基板１を前記第１の搬送手段５１Ａの搬送方向に対し直交する方向に搬送する第２の搬送手段５１Ｂと、偏光板上に接着剤層を介して剥離フィルム１１Ｂが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム１１Ｂ側と前記第１の帯状フィルム１０Ａの剥離フィルム１１Ａ側とを合わせたときの前記第１の帯状フィルム１０Ａの偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段５１Ｂによって搬送される前記基板１の前記第１のフィルム片１９Ａが貼合された面と反対側の板面側から供給される第２の帯状フィルム１０Ｂがその長手方向に対し直交する進行方向側の切断面が前記第２の搬送手段５１Ｂによって搬送される前記基板１に対応する長さまで進行したときに、前記第２の帯状フィルム１０Ｂを前記剥離フィルム１１Ｂを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第２の切断手段５２Ｂと、前記第２の切断手段５２Ｂの切断により切り出された第２のフィルム片１９Ｂから前記剥離フィルム１１Ｂを分離する第２の剥離フィルム分離手段５３Ｂと、前記剥離フィルム１１Ｂが分離された前記第２のフィルム片１９Ｂの接着面を、前記第２の搬送手段５１Ｂによって搬送されてきた前記基板１の進行方向側の端面と前記第２のフィルム片１９Ｂの切断面が平行になるように、当該基板１の対応する前記第１のフィルム片１９Ａが貼合された面と反対側の板面に貼合する第２の貼合手段５４Ｂと、を備える。
【００４０】
実施形態３に係る偏光板貼合装置５０は、図６〜図９においては基板１の下側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の下側からフィルム片１９Ａを貼合しているが、基板１の上側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の上側からフィルム片１９Ａを貼合してもよく、基板１の下側からフィルム片１９Ａを貼合し、基板を反転させないで、基板１の上側からフィルム片１９Ａを貼合してもよく、基板１の上側からフィルム片１９Ａを貼合し、基板を反転させないで、基板１の下側からフィルム片１９Ａを貼合してもよい。基板１の下側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の下側からフィルム片１９Ａを貼合するタイプの偏光板貼合装置５０であれば、帯状フィルムの下方側の面から切り込む（ハーフカット）ことになるので、ゴミの混入を防止することができるというメリットがある。
【００４１】
実施形態３に係る偏光板貼合装置５０において用いる基板１及び帯状フィルム１０Ａ、１０Ｂは、実施形態２において用いるものと同様であるが、基板１の縦と横の長さが異なるときは、帯状フィルム１０Ａと帯状フィルム１０Ｂそれぞれのフィルム幅を基板１に対応して異なる幅にすることがある。これにより、帯状フィルムが巻回された巻出ロールは、サイズ（幅）で区別できるのでロールの交換の際にも区別しやすい。また、円偏光フィルムとする場合、第１の帯状フィルム１０Ａの位相差膜の配向軸と第２の帯状フィルム１０Ｂの位相差膜の配向軸を同じにする。これにより、基板の両面にフィルム片を貼合させたときの位相差膜の配向軸を互いに直交させることができ、かつ、帯状フィルムを連続的に供給することが可能である。
【００４２】
実施形態３に係る搬送手段５１Ａ、５１Ｂ、切断手段５２Ａ、５２Ｂ、剥離フィルム分離手段５３Ａ、５３Ｂ、貼合手段５４Ａ、５４Ｂ、巻出ロール５６Ａ、５６Ｂ、及び巻取ロール５７Ａ、５７Ｂは（図８及び図９参照）、それぞれ実施形態１に係る偏光板貼合装置の搬送手段３６、切断手段３１Ｂ、剥離フィルム分離手段３２Ｂ、貼合手段３３、巻出ロール３４Ｂ及び巻取ロール３５Ｂとほぼ同様である（図１参照）。
【００４３】
実施形態３の貼合手段５４Ａでは、基板１の片面だけにフィルム片１９Ａを貼合させている。貼合手段５４Ｂでは、見かけ上基板１の両面にフィルム片１９Ａ、１９Ｂを貼合させているが、実質的には基板１の片面にフィルム片１９Ｂを貼合させている。
【００４４】
反転手段５５は、貼合手段５４Ａ、５４Ｂそれぞれにおいてフィルム片１９Ａ、１９Ｂを供給する方向が同じ場合、例えば、第１の貼合手段５４Ａで基板下面側からフィルム片１９Ａを供給し、第２の貼合手段５４Ｂで基板下面側からフィルム片１９Ｂを供給するような場合には必要である。なお、貼合手段５４Ａ、５４Ｂにおいてフィルム片１９Ａ、１９Ｂを供給する方向が対向する場合、例えば、第１の貼合手段５４Ａで基板下面からフィルム片１９Ａを貼合し、第２の貼合手段５４Ｂで基板上面からフィルム片１９Ｂを貼合するような場合には、反転手段５５は不用となる。
【００４５】
本発明の実施形態４について図面を用いて説明する。図１０は、本発明の実施形態４に係る偏光板貼合装置の第１の搬送部の構成を模式的に示した側面図である。図１１は、本発明の実施形態４に係る偏光板貼合装置の第２の搬送部の構成を模式的に示した側面図である。
【００４６】
実施形態４に係る偏光板貼合装置は、図６に示す実施形態３に係る偏光板貼合装置と同様に、大きく第１の搬送部、反転部、第２の搬送部に分けることができる。第１の搬送部では、供給部から供給された基板（図７の１Ａ）が搬送され、巻出ロールから巻き出された偏光板を剥離フィルムを分離して、偏光板が基板（図７の１Ｂ）の下側片面に貼合され、偏光板が所定位置で切断される。反転部では、第１の搬送部から搬送されてきた基板（偏光板が下側片面に貼合された基板；図７の１Ｂ）を、反転後の前記基板の進行方向側の端面が進行方向に対して直交するように、上下反転させ、反転した基板（偏光板が上側片面に貼合された基板；図７の１Ｃ）を第２の搬送部に送る。第２の搬送部では、反転部から送られてきた基板（偏光板が上側片面に貼合された基板；図７の１Ｄ）が第１の搬送部で搬送される基板の方向と直交する方向に搬送され、巻出ロールから巻き出された偏光板を剥離フィルムを分離して、偏光板が基板（偏光板が両面に貼合された基板；図７の１Ｅ）の下側片面に貼合され、偏光板が所定位置で切断される。
【００４７】
実施形態４に係る偏光板貼合装置の構成について図１０及び図１１を用いて詳細に説明すると、偏光板貼合装置６０は、基板１の一つの端面を進行方向に対し直交させて前記基板１を搬送する第１の搬送手段６１Ａと、偏光板上に接着剤層を介して剥離フィルム１１Ａが貼着された第１の帯状フィルム１０Ａから前記剥離フィルム１１Ａを分離する第１の剥離フィルム分離手段６２Ａと、前記剥離フィルム１１Ａが分離された前記第１の帯状フィルム１０Ａの接着面を、前記第１の帯状フィルム１０Ａの進行方向が前記第１の搬送手段６１Ａによって搬送される前記基板１の搬送方向と対応するように、当該基板１の対応する板面片側に貼合する第１の貼合手段６３Ａと、前記第１の貼合手段６３Ａによって前記基板１上に貼合された前記第１の帯状フィルム１０Ａを、前記第１の搬送手段６１Ａによって搬送される前記基板１の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第１の切断手段６４Ａと、前記第１の搬送手段６１Ａによって搬送されてきた前記第１のフィルム片１９Ａが貼合された前記基板１を、反転後の前記基板１の進行方向側の端面が進行方向に対して直交するように、上下反転させる反転手段６５と、前記第１の搬送手段６１Ａによって搬送されてきた前記基板１を前記第１の搬送手段６１Ａの搬送方向に対し直交する方向に搬送する第２の搬送手段６１Ｂと、偏光板上に接着剤層を介して剥離フィルム１１Ｂが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム１１Ｂ側と前記第１の帯状フィルム１０Ａの剥離フィルム１１Ａ側とを合わせたときの前記第１の帯状フィルム１０Ａの偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段６１Ｂによって搬送される前記基板１の前記第１のフィルム片１９Ａが貼合された面と反対側の板面側から供給される第２の帯状フィルム１０Ｂから前記剥離フィルム１１Ｂを分離する第２の剥離フィルム分離手段６２Ｂと、前記剥離フィルム１１Ｂが分離された前記第２の帯状フィルム１０Ｂの接着面を、前記第２の帯状フィルム１０Ｂの進行方向が前記第２の搬送手段６１Ｂによって搬送される前記基板１の搬送方向と対応するように、当該基板１の対応する前記第１の帯状フィルム１０Ａのフィルム片１９Ａが貼合された面と反対側の板面に貼合する第２の貼合手段６３Ｂと、前記第２の貼合手段６３Ｂによって前記基板１上に貼合された前記第２の帯状フィルム１０Ｂを前記第２の搬送手段６１Ｂによって搬送される前記基板１の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第２の切断手段６４Ｂと、を備える。
【００４８】
実施形態４に係る偏光板貼合装置６０は、図１０及び図１１においては基板１の下側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の下側からフィルム片１９Ａを貼合しているが、基板１の上側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の上側からフィルム片１９Ａを貼合してもよく、基板１の下側からフィルム片１９Ａを貼合し、基板を反転させないで、基板１の上側からフィルム片１９Ａを貼合してもよく、基板１の上側からフィルム片１９Ａを貼合し、基板を反転させないで、基板１の下側からフィルム片１９Ａを貼合してもよい。基板１の下側からフィルム片１９Ａを貼合し、基板を反転させて、基板１の下側からフィルム片１９Ａを貼合するタイプの偏光板貼合装置５０であれば、帯状フィルムの下方側の面からハーフカットすることになるので、ゴミの混入を防止することができるというメリットがある。
【００４９】
実施形態４に係る偏光板貼合装置５０において用いる基板１及び帯状フィルム１０Ａ、１０Ｂは、実施形態３において用いるものと同様である。
【００５０】
実施形態４に係る剥離フィルム分離手段６２Ａ、６２Ｂ、貼合手段６３Ａ、６３Ｂ、巻出ロール６６Ａ、６６Ｂ、及び巻取ロール６７Ａ、６７Ｂは（図１０及び図１１参照）、それぞれ実施形態３に係る偏光板貼合装置の剥離フィルム分離手段５３Ａ、５３Ｂ、貼合手段５４Ａ、５４Ｂ、巻出ロール５６Ａ、５６Ｂ、及び巻取ロール５７Ａ、５７Ｂとほぼ同様である（図８及び図９参照）。実施形態４に係る搬送手段６１Ａ、６１Ｂは（図１０及び図１１参照）、実施形態２に係る搬送手段４６と同様である（図４参照）。実施形態４に係る切断手段６４Ａ、６４Ｂは、実施形態３に係る切断手段と異なり、搬送手段６１Ａ、６１Ｂの貼合手段６３Ａ、６３Ｂより下流側のライン上に配設されており、基板片面側（下面側）のみ帯状フィルム１０Ａ、１０Ｂを切断する。なお、貼合手段５４においては、フィルム片ではなく切断していない帯状フィルム１０Ａ、１０Ｂを基板１の両面に貼合している点で異なる。
【００５１】
【発明の効果】
本発明によれば、偏光板を基板の両面に連続的に自動貼合することができる。
【００５２】
また、本発明によれば、フィルム片の移載の必要がなく、剥離フィルムが切断されていないので、高速化することができる。
【００５３】
また、本発明によれば、不要となる偏光板の切断片が出ないので、得率１００％を実現できる。その結果、表示装置のコストダウンを図ることができる。
【００５４】
また、本発明によれば、ＴＮ液晶用の基板の両面に偏光板を貼合する際、偏光板の透過軸方向の管理が容易になる。
【００５５】
また、本発明によれば、位相差膜と偏光板を貼り合わせた円偏光板フィルムを連続的に基板に貼合させることができ、不要となる円偏光板フィルムの切断片が出ないので、円偏光板フィルムの得率を１００％とすることが可能である。
【００５６】
また、本発明によれば、偏光板を基板両面に同時に貼合する場合には、装置設備を小さくすることができる。
【００５７】
また、本発明によれば、搬送される基板の下方側からフィルム片を供給するとともに、帯状フィルムの下方側の面からハーフカットする場合には、ゴミの混入を防止することができる。搬送される基板の下方側から帯状フィルムを供給するので、帯状フィルムのロールの交換が容易である。
【図面の簡単な説明】
【図１】本発明の実施形態１に係る偏光板貼合装置の構成を模式的に示した側面図である。
【図２】本発明の実施形態１に係る偏光板貼合装置において用いられる帯状フィルムの構成を示した（Ａ）平面図及び（Ｂ）断面図である。
【図３】本発明の実施形態１に係る偏光板貼合装置によって基板両面に貼合される偏光板の延伸方向と基板の関係を模式的に示した展開斜視図である。
【図４】本発明の実施形態２に係る偏光板貼合装置の構成を模式的に示した側面図である。
【図５】本発明の実施形態１に係る偏光板貼合装置によって基板両面に貼合される偏光板の延伸方向と基板の関係を模式的に示した展開斜視図である。
【図６】本発明の実施形態３に係る偏光板貼合装置の構成を模式的に示した斜視図である。
【図７】本発明の実施形態３に係る偏光板貼合装置の構成を模式的に示した平面図である。
【図８】本発明の実施形態３に係る偏光板貼合装置の第１の搬送部の構成を模式的に示した側面図である。
【図９】本発明の実施形態３に係る偏光板貼合装置の第２の搬送部の構成を模式的に示した側面図である。
【図１０】本発明の実施形態４に係る偏光板貼合装置の第１の搬送部の構成を模式的に示した側面図である。
【図１１】本発明の実施形態４に係る偏光板貼合装置の第２の搬送部の構成を模式的に示した側面図である。
【図１２】従来の偏光板貼合装置において用いられる帯状フィルムの構成を示した平面図及び断面図である。
【符号の説明】
１ 基板
１０、１０Ａ、１０Ｂ 帯状フィルム
１１、１１Ａ、１１Ｂ 剥離フィルム
１２、１４ 接着剤層
１３ 位相差膜
１５、１７ 保護フィルム
１６ 偏光板
１８ 合紙
１９、１９Ａ、１９Ｂ フィルム片
３０、４０ 偏光板貼合装置
３１Ａ、３１Ｂ、４３ 切断手段
３２Ａ、３２Ｂ、４１Ａ、４１Ｂ 剥離フィルム分離手段
３３、４２ 貼合手段
３４Ａ、３４Ｂ、４４Ａ、４４Ｂ 巻出ロール
３５Ａ、３５Ｂ、４５Ａ、４５Ｂ 巻取ロール
３６、４６ 搬送手段
５０、６０ 偏光板貼合装置
５１Ａ、５１Ｂ、６１Ａ、６１Ｂ 搬送手段
５２Ａ、５２Ｂ、６４Ａ、６４Ｂ 切断手段
５３Ａ、５３Ｂ、６２Ａ、６２Ｂ 剥離フィルム分離手段
５４Ａ、５４Ｂ、６３Ａ、６３Ｂ 貼合手段
５５、６５ 反転手段
５６Ａ、５６Ｂ、６６Ａ、６６Ｂ 巻出ロール
５７Ａ、５７Ｂ、６７Ａ、６７Ｂ 巻取ロール[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a polarizing plate bonding method and apparatus for bonding a polarizing plate to a substrate.
[0002]
[Prior art]
With the widespread use of liquid crystal display devices (hereinafter referred to as LCDs), the demand for polarizing plates is rapidly increasing. In the polarizing film, a protective film is generally bonded to both surfaces or one surface of a polarizing layer having polarizing ability (see FIG. 12B). As a material for the polarizing layer, polyvinyl alcohol (hereinafter referred to as PVA) is mainly used. After the PVA film is uniaxially stretched, it is dyed with iodine or a dichroic dye or dyed, and then stretched. A polarizing film for a polarizing layer is formed by crosslinking with a compound. As the protective film, cellulose triacetate (hereinafter referred to as TAC) is mainly used because it is optically transparent and has a small birefringence. Since the polarizing plate is usually stretched in the longitudinal direction, the absorption axis of the polarizing film is substantially parallel to the longitudinal direction (see FIG. 12A). The polarizing plate film is provided with an adhesive layer for bonding onto the substrate, and a release film for protecting the adhesive layer from foreign matters such as dust is bonded thereon. The polarizing film to which the release film is bonded is supplied in the form of a roll of a strip-like film stretched in the longitudinal direction.
[0003]
In a conventional LCD using TN (Twisted Nematic) liquid crystal, a polarizing plate is bonded to both sides of a substrate, and one side of the polarizing plate is in the vertical or horizontal direction of the screen. A first polarizing plate having a transmission axis inclined by 45 ° is disposed, and a second polarizing plate having a transmission axis inclined in a direction orthogonal to the transmission axis of the first polarizing plate is disposed on the other surface. The For this reason, a method in which polarizing plate chips in which roll-type polarizing plates are punched in advance in a direction of 45 ° with respect to the longitudinal direction of the roll are bonded to both surfaces of the LCD one by one in accordance with the transmission axis direction (for example, Japanese Patent Application Laid-Open No. 2002-2002). No. 23151) and a method of cutting a polarizing plate after laminating a polarizing plate in a roll form with the vertical or horizontal direction of the LCD screen inclined by 45 ° with respect to the longitudinal direction of the roll (for example, JP-A-11-95028, 12A) has been devised. Also, in LCDs using VA (Vertical Alignment) liquid crystal and IPS (In Plane Switching) liquid crystal, the transmission axis of the polarizing plate is arranged in the vertical or horizontal direction of the screen, and the polarizing plate piece is Each sheet is attached to the LCD.
[0004]
[Patent Document 1]
JP 2002-23151 A
[Patent Document 2]
Japanese Patent Laid-Open No. 11-95028
[0005]
[Problems to be solved by the invention]
However, in the case of the method of laminating the polarizing plate chip to the LCD one by one, when laminating the polarizing plate chip to the substrate, the polarizing plate chip is transferred and separated one by one immediately before the laminating. Since it is necessary to peel off the film, there is a limit to shortening the process time. Further, since the polarizing plate chip is usually punched from a roll-shaped polarizing plate film, curling is likely to occur, and workability when transferring and transporting the polarizing plate is poor. Furthermore, when polarizing plate chips are bonded to the LCD one by one, one side of the LCD is often adsorbed and supported, so the direction of the transmission axis of the polarizing plate to be bonded to both sides is matched. It is difficult to paste a polarizing plate chip on both sides simultaneously.
[0006]
Further, in the method of cutting the polarizing plate after laminating the polarizing plate by tilting the vertical or horizontal direction of the LCD screen by 45 ° with respect to the longitudinal direction of the roll, there are many unusable portions near the end of the roll. In particular, when a large-size polarizing plate is used with an increase in the screen size of the LCD, there is a problem that the yield is reduced. Moreover, since the piece of the polarizing plate which was not used for pasting is used in combination with a plurality of materials, it is difficult to reuse, resulting in an increase in waste. Such a problem is a common problem also in the case of the method of bonding the polarizing plate chips one by one to the LCD. In addition, when laminating the polarizing plate with the vertical or horizontal direction of the LCD screen inclined by 45 ° with respect to the roll longitudinal direction, a carrier for keeping the LCD angle constant is required. It is difficult to continuously and simultaneously paste the polarizing plate on both sides. In addition, even when pasting one side of the substrate and then pasting the opposite side, it is necessary to adjust the angle when transferring from the first carrier to the second carrier, so it is automated. Even complicated mechanisms are required.
[0007]
By the way, for the purpose of optical compensation such as coloring prevention and widening of the viewing angle, the retardation film is used by being adhered to a polarizing plate or the like forming an LCD, and the alignment axis is set at various angles with respect to the transmission axis of the polarizing plate. It is required to set. Conventionally, from a vertically or laterally uniaxially stretched film (for example, PET), a method is used in which the periphery is punched and cut so that the orientation axis has a predetermined inclination angle with respect to the side. A decrease in yield has been a problem.
[0008]
The 1st objective of this invention is providing the polarizing plate bonding method and apparatus which can bond a polarizing plate on both surfaces of a board | substrate simultaneously.
[0009]
The second object of the present invention is to provide a polarizing plate laminating method and apparatus with high work efficiency.
[0010]
The third object of the present invention is to provide a polarizing plate laminating method and apparatus having a high polarizing plate yield.
[0011]
The fourth object of the present invention is to provide a polarizing plate laminating method and apparatus having a high yield of a composite film obtained by laminating a retardation film and a polarizing plate.
[0012]
[Means for Solving the Problems]
In the 1st viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: A peeling film is bonded via an adhesive layer on a polarizing plate, and the board | substrate conveyed The release film is attached to the first strip-shaped film supplied from the front plate surface side of the film and the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film side and the First supplied from the plate surface side of the back side of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first band-shaped film when the release film side of the first band-shaped film is combined. 2, when the cut surface on the traveling direction side perpendicular to the longitudinal direction of the film has traveled to a length corresponding to the substrate, the first belt film and the second belt film are respectively Leave the release film a little At least cutting means for cutting the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, the first film piece cut out by the cutting of the first strip film, and the second strip film The first film has a release film separating means for separating the release film from each of the second film pieces cut out by the cutting, and an adhesive surface of the first film piece from which the release film is separated. The second film piece from which the release film is separated while being bonded to the corresponding front side plate surface of the substrate so that the cut surface of the piece is parallel to the front end surface in the transport direction of the substrate Bonding means for bonding the adhesive surface of the second film piece to the corresponding back side plate surface of the substrate so that the cut surface of the second film piece is parallel to the front end surface in the transport direction of the substrate; Characterized in that it comprises.
[0013]
In the 2nd viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: A peeling film is bonded via an adhesive layer on a polarizing plate, and the board | substrate conveyed The release film is attached to the first strip-shaped film supplied from the front plate surface side of the film and the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film side and the First supplied from the plate surface side of the back side of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first band-shaped film when the release film side of the first band-shaped film is combined. A stripping film separating means for separating the stripping film from each of the strips of film 2; an adhesive surface of the first strip-shaped film from which the stripping film is separated; and a traveling direction of the first strip-shaped film is Board transfer direction and In response, the substrate is bonded to the corresponding front side plate surface of the substrate and the adhesive surface of the second strip film is separated from the release film, and the traveling direction of the second strip film is the substrate. The first strip-shaped film and the first film bonded to both surfaces of the substrate by the bonding means, the bonding means for bonding to the corresponding back side plate surface of the substrate so as to correspond to the transport direction of the substrate And a cutting means for cutting each of the two belt-like films in parallel with an end face on the front side in the transport direction of the substrate or an end face on the rear side thereof.
[0014]
In the 3rd viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: The 1st conveyance means which makes one end surface of a board | substrate orthogonally cross with respect to a advancing direction, and conveys the said board | substrate. And the adhesive surface of the first film piece having the polarizing plate, so that the cut surface of the first film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the first conveying means, A first laminating means for laminating on a corresponding plate surface one side of the substrate, and the substrate conveyed by the first conveying means in a direction orthogonal to the conveying direction of the first conveying means The first conveying unit having the polarizing plate and the transmission axis direction of the polarizing plate is aligned with the bonding surface side of the polarizing plate and the bonding surface side of the first film piece. Orthogonal to the transmission axis direction of the polarizing plate of the film piece, and the second The second film piece is cut from the adhesive surface of the second film piece supplied from the plate surface side opposite to the surface on which the first film piece of the substrate conveyed by the feeding means is bonded. On the plate surface opposite to the surface on which the corresponding first film piece of the substrate is bonded so that the surface is parallel to the end surface on the traveling direction side of the substrate conveyed by the second conveying means. And a second bonding means for bonding.
[0015]
In the 4th viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: The 1st conveyance means which makes one end surface of a board | substrate orthogonal to a advancing direction, and conveys the said board | substrate. And the adhesion surface of the first strip film having a polarizing plate is parallel to the end surface on the traveling direction side of the substrate transported by the first transport means, so that the travel direction of the first strip film is The first cutting means that cuts in parallel with the end face on the front side in the transport direction of the substrate bonded to the corresponding plate surface one side or the end face on the rear side thereof, and has been transported by the first transport means The second transport means for transporting the substrate in a direction orthogonal to the transport direction of the first transport means, and a polarizing plate, and the transmission axis direction of the polarizing plate is the adhesive surface side of the polarizing plate and the first When combined with the adhesive side of film piece 1 Of the first film piece perpendicular to the transmission axis direction of the polarizing plate and opposite to the surface of the substrate on which the film piece of the first belt-like film is bonded by the second conveying means. An adhesive surface of the second belt-shaped film supplied from the side plate surface side, an end surface on the traveling direction side of the substrate on which the cut surface of the second belt-shaped film is transported on the line of the second transport means; The end surface on the front side in the transport direction of the substrate bonded to the plate surface opposite to the surface on which the film pieces of the corresponding first band-shaped film are bonded so as to be parallel or the end surface on the rear side thereof And a second cutting means for cutting in parallel.
[0016]
In the 5th viewpoint of this invention, it is a polarizing plate bonding method which bonds a polarizing plate to a board | substrate, Comprising: A peeling film is stuck on a polarizing plate through an adhesive bond layer, and the board | substrate conveyed The release film is attached to the first strip-shaped film supplied from the front plate surface side of the film and the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film side and the First supplied from the plate surface side of the back side of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first band-shaped film when the release film side of the first band-shaped film is combined. 2, when the cut surface on the traveling direction side orthogonal to the longitudinal direction of the film travels to a length corresponding to the substrate, the first belt film and the second belt film are peeled off, respectively. Less to leave film And the step of cutting the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, the first film piece cut out by the cutting of the first strip film, and the second strip film A step of separating the release film from each of the second film pieces cut out by cutting, an adhesive surface of the first film piece from which the release film is separated, and a cut surface of the first film piece. Bonding to the corresponding front side plate surface of the substrate so as to be parallel to the front end surface of the substrate transport direction, the adhesive surface of the second film piece from which the release film is separated, And bonding to the corresponding back side plate surface of the substrate so that the cut surface of the second film piece is parallel to the front end surface in the transport direction of the substrate. .
[0017]
In the 6th viewpoint of this invention, it is a polarizing plate bonding method which bonds a polarizing plate to a board | substrate, Comprising: While a peeling film is bonded via an adhesive layer on a polarizing plate, the board | substrate conveyed The release film is attached to the first strip-shaped film supplied from the front plate surface side of the film and the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film side and the First supplied from the plate surface side of the back side of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first band-shaped film when the release film side of the first band-shaped film is combined. A step of separating the release film from each of the two strip-shaped films, and an adhesive surface of the first strip-shaped film from which the release film is separated, and a traveling direction of the first strip-shaped film is transporting the substrate. To correspond with the direction, Bonding to the corresponding front side plate surface of the substrate, the adhesive surface of the second strip film separated from the release film, the traveling direction of the second strip film corresponds to the transport direction of the substrate As described above, each of the first strip film and the second strip film bonded to both surfaces of the substrate by the bonding means and the step of bonding to the corresponding back side plate surface of the substrate. And a step of cutting in parallel with an end face on the front side in the transport direction of the substrate or an end face on the rear side thereof.
[0018]
In a seventh aspect of the present invention, there is provided a polarizing plate laminating method for laminating a polarizing plate on a substrate, the step of conveying the substrate with one end face of the substrate orthogonal to the traveling direction, and a polarizing plate The bonding surface of the first film piece having the above is bonded to the corresponding plate surface one side of the substrate so that the cut surface of the first film piece is parallel to the front end surface in the substrate transport direction. A process, a process of transporting the substrate that has been transported in a direction orthogonal to the transport direction, a polarizing plate, and a transmission axis direction of the polarizing plate on the adhesive surface side of the polarizing plate The first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first film piece when the first film piece is bonded to the bonding surface side is bonded. Of the second film piece supplied from the opposite side of the plate surface The surface of the second film piece is opposite to the surface on which the corresponding first film piece is bonded so that the cut surface of the second film piece is parallel to the front end surface in the substrate transport direction. And a step of bonding to the plate surface.
[0019]
According to an eighth aspect of the present invention, there is provided a polarizing plate laminating method for laminating a polarizing plate on a substrate, the step of conveying the substrate with one end face of the substrate orthogonal to the traveling direction, and the polarizing plate. The adhesive surface of the first belt-shaped film having the above is bonded to the corresponding plate surface one side so that the traveling direction of the first belt-shaped film is parallel to the front end surface in the transport direction of the substrate. A step of cutting in parallel with an end face on the front side in the transport direction of the substrate or an end face on the rear side thereof; a second transport step of transporting the substrate that has been transported in a direction orthogonal to the transport direction; The polarizing plate has a polarizing plate and the transmission axis direction of the polarizing plate is aligned with the adhesive surface side of the polarizing plate and the adhesive surface side of the first film piece. Orthogonal to the axial direction and the first of the substrate The adhesive surface of the second belt-like film supplied from the plate surface side opposite to the surface on which the film pieces of the film-like film are bonded is the front side in the transport direction of the substrate. The end surface on the front side in the transport direction of the substrate bonded to the plate surface opposite to the surface on which the film piece of the corresponding first strip film is bonded so as to be parallel to the end surface of the substrate, or the rear thereof And a step of cutting in parallel with the end face on the side.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a side view schematically showing a configuration of a polarizing plate bonding apparatus according to Embodiment 1 of the present invention. FIG. 2: is the (A) top view and (B) sectional drawing which showed the structure of the strip | belt-shaped film used in the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention. FIG. 3 is a developed perspective view schematically showing the relationship between the stretching direction of the polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.
[0021]
In the polarizing plate bonding apparatus 30 according to Embodiment 1, referring to FIG. 1, the release film 11 </ b> A is bonded onto the polarizing plate via an adhesive layer, and the front surface side of the substrate 1 to be conveyed. When the cut surface on the traveling direction side orthogonal to the longitudinal direction of the first belt-like film 10A supplied from the head advances to a length corresponding to the substrate 1, the first belt-like film 10A is removed from the release film 11A. The first cutting means 31A that cuts at least the polarizing plate and the adhesive layer in a direction orthogonal to the longitudinal direction, and the release film 11B is stuck on the polarizing plate via the adhesive layer, The transmission axis of the polarizing plate of the first strip-shaped film 10A when the transmission axis direction of the polarizing plate combines the release film 11B side and the release film 11A side of the first strip-shaped film 10A. The cut surface on the traveling direction side perpendicular to the longitudinal direction of the second belt-like film 10B supplied from the back plate surface side of the substrate 1 to be conveyed is a length corresponding to the substrate 1. The second cutting means 31B that cuts at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film 11B, and the second strip film 10B, By first release film separating means 32A for separating the release film 11A from the first film piece 19A cut from the first strip film 10A by the first cutting means 31A, and by the second cutting means 31B. Second release film separating means 3 for separating the release film 11B from the second film piece 19B cut out from the second belt-like film 10B. B and the adhesive surface of the first film piece 19A from which the release film 11A is separated so that the cut surface of the first film piece 19A is parallel to the front end surface in the transport direction of the substrate 1 In addition, the bonding surface of the second film piece 19B from which the release film 11B is separated is bonded to the corresponding front side plate surface of the substrate 1, and the cut surface of the second film piece 19B is Bonding means 33 for bonding to the corresponding back side plate surface of the substrate 1 so as to be parallel to the front end surface in the transport direction of the substrate 1. Thereby, while being able to bond a polarizing plate automatically to both surfaces of a board | substrate simultaneously and continuously, the yield of a polarizing plate can be made into 100%. Moreover, the transmission axis direction of the polarizing plate bonded on both surfaces can be made to cross each other and bonded by using two unwinding rolls of the same type.
[0022]
The strip-shaped film (10A, 10B in FIG. 1) applied in the present invention has the release film 11 on the polarizing plate 16 via the adhesive layers 14, 12 (retardation film 13), as shown in FIG. 2 (B). It is a film using what was stuck. When the polarizing plate 16 is used for an LCD for a TN liquid crystal, the transmission axis direction is obliquely oriented with respect to the film longitudinal direction, and the inclination angle between the film longitudinal direction and the transmission axis direction is 20 ° or more and 70 °. Although it is preferably below, it is more preferably 40 ° or more and 50 ° or less, and usually 45 ° (see FIG. 2 (A)). For a method for producing such a polarizing plate, refer to JP-A-2002-86554. The polarizing plate 16 preferably has protective films 15 and 17 attached to both sides thereof. Since the polarizing plate 16 here is a polarizing plate that is obliquely stretched with respect to the longitudinal direction of the film, it is hereinafter referred to as an “obliquely stretching polarizing plate”. If the obliquely stretched polarizing plate 16 is used, a continuous film can be supplied. Moreover, when the 1st strip | belt-shaped film 10A and the 2nd strip | belt-shaped film 10B match | combine the peeling film 11A side of the 1st strip | belt-shaped film 10A and the peeling film 11B side of the 2nd strip | belt-shaped film 10B, it is 1st. Used in such a combination that the transmission axis direction of the polarizing plate of the belt-like film 10A and the transmission axis direction of the polarizing plate of the second belt-like film 10B are orthogonal to each other. For example, the polarizing plate with respect to the longitudinal direction of the first belt-like film 10A In the case where a film whose transmission axis direction is oriented at 70 ° is used, a film whose transmission axis direction of the polarizing plate is oriented at 20 ° with respect to the longitudinal direction can be used for the second strip film 10B. Further, the first strip film 10A and the second strip film 10B (the first film piece 19A and the second film piece 19B) are obliquely stretched (transmission axis direction) when viewed from the respective adhesive surfaces. Is preferably 45 ° and the same is used (see FIG. 3). This is because by using the same material in the oblique stretching direction, the transmission axis directions can be crossed when polarizing plates are bonded to both surfaces of the substrate 1. In addition, when used for an LCD for VA liquid crystal or an LCD for IPS liquid crystal, the polarizing plate 16 may be one in which the transmission axis direction of the polarizing plate is aligned parallel or perpendicular to the longitudinal direction of the film. In the case of using the first strip film 10A in which the transmission axis direction of the polarizing plate is oriented parallel to the longitudinal direction, the transmission axis direction of the polarizing plate is oriented perpendicular to the longitudinal direction of the second strip film 10B. Things can be used.
[0023]
In the case of a circularly polarizing film in which the retardation film 13 is bonded to the obliquely stretched polarizing plate 16 (protective film 15) via the adhesive layer 14, the retardation film 13 has an orientation axis orthogonal or parallel to the film longitudinal direction. It is preferable to use what has. If it does in this way, a circularly-polarizing film can be supplied continuously. In the case of a circularly polarizing film, if the orientation axis of the retardation film of the first strip film (10A in FIG. 1) is parallel to the film longitudinal direction, the retardation film of the second strip film (10B in FIG. 1) The orientation axis is perpendicular to the film longitudinal direction.
[0024]
Although the thickness of the polarizing plate 16 is not specifically limited, For example, it is about 5-100 micrometers. The width of the polarizing plate 16 is appropriately selected according to the size of the substrates to be bonded. A 1st strip | belt-shaped film (10A of FIG. 1) and a 2nd strip | belt-shaped film (10B of FIG. 1) can each use the same width | variety. The adhesives 12 and 16 may be ordinary adhesives (for example, acrylic adhesives, polyurethane adhesives, epoxy adhesives, rubber adhesives, etc.) used for bonding the substrate and the optical film. . The release film 11 is a release material and may be an ordinary release material (for example, a polyethylene terephthalate film, a polyester film, etc.) used for an optical film. In order to protect the surface of the film from scratches or the like, an interleaf paper 18 may be attached to the surface of the polarizing plate opposite to the surface to which the release film 11 is attached. The strip films 10A and 10B are preferably supplied from unwinding rolls 34A and 34B (see FIG. 1).
[0025]
The substrate 1 is a flat plate member such as a glass substrate or a synthetic resin substrate used for a display device such as a liquid crystal display device or a plasma display device, and may be a substrate on which components such as a liquid crystal cell and an electrode are formed in advance. Good. The shape of the substrate 1 is preferably a substantially square shape such as a square or a rectangle (see FIGS. 1 and 2A).
[0026]
The first cutting means 31A and the second cutting means 31B are a push-cut cutter, a dicing cutter, etc. used for normal cutting of an optical film. For example, a cutter blade, a cylinder that drives the cutter blade, and a cutter blade The thing provided with the bottom dead center position adjustment member which adjusts a bottom dead center position is mentioned. By adjusting the bottom dead center position to 0 to 0.5 times the thickness of the release film 11, other layers (polarizing plates) leaving the release film 11 (thickness 10 to 50 μm or less) are left. , Adhesive layer, etc.) can be cut in a direction perpendicular to the film longitudinal direction (hereinafter referred to as half cut) (see FIG. 1).
[0027]
The first release film separating means 32A and the second release film separating means 32B are means for separating the release films 11A and 11B from the film pieces 19A and 19B (see FIG. 1), and examples thereof include rollers and wedge members. be able to.
[0028]
Note that the release films 11A and 11B separated from the film pieces 19A and 19B may be wound around the winding rolls 35A and 35B and collected (see FIG. 1).
[0029]
The bonding means 33 is configured such that the adhesive surfaces of the two film pieces 19A and 19B from which the release films 11A and 11B are separated are the end face on the front end side in the transport direction of the substrate transported by the transport means 36 and the film pieces 19A and 19B. Is a means for simultaneously bonding to corresponding positions of the substrate 1 so that the cut surfaces of the substrate are parallel (see FIG. 1), for example, a nip roller (rubber roller, metal roller) that is pressed from both surfaces of the substrate. In the case of a roller, a combination of two rubber rolls having a hardness of 60 to 80 ° or a combination of one rubber roll having a hardness of 60 to 80 ° and a metal roll is preferable. The nip pressure of the roller at the time of pasting is preferably a linear pressure of 1 kg / cm or less.
[0030]
The conveying means 36 is preferably a roller conveyor or a wheel conveyor that horizontally conveys the substrate 1 on a plurality of arranged rollers or wheels, and more preferably a roller outer cylinder or a shaft on which a wheel rotates via a bearing. By being attached, the roller outer cylinder or wheel rotates at a surface speed that matches the speed of the substrate being transported and prevents the substrate from being damaged by sliding between the roller outer cylinder or wheel and the substrate. preferable.
[0031]
Next, Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 4: is the side view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 2 of this invention. FIG. 5 is an exploded perspective view schematically showing the relationship between the stretching direction of the polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.
[0032]
When the polarizing plate bonding apparatus 40 according to Embodiment 2 is referred to FIG. 4, the release film 11 </ b> A is bonded onto the polarizing plate via an adhesive layer, and the front surface side of the substrate 1 to be conveyed. The first release film separating means 41A for separating the release film 11A from the first belt-like film 10A supplied from the first release film 11A, and the release film 11B is stuck on the polarizing plate via an adhesive layer, and the polarized light The transmission axis direction of the plate is perpendicular to the transmission axis direction of the polarizing plate of the first strip film 10A when the release film 11B side and the release film 11A side of the first strip film 10A are combined, and A second release film separating means 41B for separating the release film 11B from a second belt-like film 10B supplied from the back plate side of the substrate 1 being conveyed; and the release film. The adhesive surface of the first belt-like film 10A from which the film 11A has been separated corresponds to the front side plate of the substrate 1 so that the traveling direction of the first belt-like film 11A corresponds to the transport direction of the substrate 1 The adhesive surface of the second strip film 10B from which the release film 11B has been separated is bonded to the surface so that the traveling direction of the second strip film 10B corresponds to the transport direction of the substrate 1. Bonding means 42 for bonding to the corresponding back side plate surface of the substrate 1, and the first band-shaped film 10 </ b> A and the second band-shaped film bonded to both surfaces of the substrate 1 by the bonding means 42. Cutting means 43 for cutting 10B in parallel with the end face on the front side in the transport direction of the substrate 1 or the end face on the rear side thereof. Thus, the polarizing plate can be automatically and continuously bonded to both surfaces of the substrate without stopping the conveyance of the substrate, and the yield of the polarizing plate can be 100%. Moreover, the transmission axis direction of the polarizing plate bonded on both surfaces can be made to cross each other and bonded by using two unwinding rolls of the same type.
[0033]
The peeling film separation means 41A and 41B, the bonding means 42, the unwinding rolls 44A and 44B, the winding rolls 45A and 45B, and the conveying means 46 of the polarizing plate bonding apparatus 40 according to the second embodiment (see FIG. 4), respectively. The peeling film separating means 32A, 32B, the bonding means 33, the unwinding rolls 34A, 34B, the winding rolls 35A, 35B, and the conveying means 36 of the polarizing plate bonding apparatus according to Embodiment 1 are substantially the same (see FIG. 1). ). The board | substrate 1 and strip | belt-shaped film 10A, 10B which are used in the polarizing plate bonding apparatus 40 concerning Embodiment 2 are the same as what is used in Embodiment 2. FIG. The position of the cutting means 43 of the polarizing plate bonding apparatus 40 according to the second embodiment is different from the cutting means with the polarizing plate bonding apparatus according to the first embodiment. In addition, in the bonding means 42 of FIG. 4, it differs in the point which bonds the strip | belt-shaped film 10A, 10B which is not a film piece but is cut | disconnected on both surfaces of the board | substrate 1. FIG.
[0034]
In the conveyance means 46 of FIG. 4, it has the cutting | disconnection means 43 on the conveyance line downstream from the bonding means 42. FIG. On the transport means 46 upstream of the pasting means 42, it is preferable that the end surface in the transport direction of the substrate 1 is in contact with and transported at least by the time of pasting. This is because the yield of the polarizing plate can be increased.
[0035]
The cutting means 43 in FIG. 4 is configured so that each of the first belt-like film 10A and the second belt-like film 10B bonded to both surfaces of the substrate 1 by the bonding means 42 is an end face on the front side in the transport direction of the substrate 1 or thereafter. Cut parallel to the end face. Here, since the release films 11A and 11B are not attached to the first strip film 10A and the second strip film 10B, the first strip film 10A and the second strip film 10B are not half-cut. Cut the whole almost simultaneously.
[0036]
The first belt-like film 10A and the second belt-like film 10B preferably have the same oblique stretching direction (transmission axis direction) when viewed from the respective adhesive surfaces (see FIG. 5). This is because by using the same material in the oblique stretching direction, the transmission axis directions can be crossed when polarizing plates are bonded to both surfaces of the substrate 1.
[0037]
Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 6: is the perspective view which showed schematically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 7: is the top view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 8: is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 9: is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention.
[0038]
If FIG. 6 is referred, the polarizing plate bonding apparatus which concerns on Embodiment 3 can be divided roughly into a 1st conveyance part, an inversion part, and a 2nd conveyance part. In the first transport unit, the substrate (1A in FIG. 7) supplied from the supply unit is transported, the polarizing film unwound from the unwinding roll is half cut at a predetermined length, and the release film is separated, The cut polarizing plate is bonded to the lower surface of the substrate (1B in FIG. 7). In the reversing section, the substrate transported from the first transport section (the substrate on which the polarizing plate is bonded to the lower side; 1B in FIG. 7), the end surface on the traveling direction side of the substrate after reversing is the traveling direction Are turned upside down so as to be orthogonal to each other, and the inverted substrate (the substrate on which the polarizing plate is bonded to the upper surface; 1C in FIG. 7) is sent to the second transport unit. In the second transport unit, the substrate sent from the reversing unit (the substrate on which the polarizing plate is bonded to the upper one surface; 1D in FIG. 7) is orthogonal to the direction of the substrate transported by the first transport unit. The polarizing plate unwound from the unwinding roll is half-cut with a predetermined length to separate the release film, and the cut polarizing plate is a substrate (the substrate on which the polarizing plate is bonded on both sides; 7 1E) is bonded to the lower side.
[0039]
If it demonstrates in detail about the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 using FIG.8 and FIG.9, the polarizing plate bonding apparatus 50 makes one end surface of the board | substrate 1 orthogonal to a advancing direction, and is said board | substrate. 1 A of the 1st conveyance means 51A which conveys 1 and the 1st strip | belt-shaped film 10A by which 11 A of peeling films were stuck on the polarizing plate via the adhesive bond layer are the cut surfaces of the advancing direction side orthogonal to the longitudinal direction When the film travels to a length corresponding to the substrate 1, the first strip film 10A is cut in a direction perpendicular to the longitudinal direction at least the polarizing plate and the adhesive layer, leaving the release film 11A. One cutting means 52A, a first peeling film separating means 53A for separating the peeling film 11A from the first film piece 19A cut by the cutting of the first cutting means 52A, The adhesive surface of the first film piece 19A from which the release film 11A is separated is cut between the front end face in the traveling direction of the substrate 1 conveyed by the first conveying means 51A and the first film piece 19A. 54 A of 1st bonding means bonded to the plate | board surface piece side to which the said board | substrate 1 respond | corresponds, and the said 1st film piece 19A conveyed by the said 1st conveyance means 51A so that a surface may become parallel. The bonded substrate 1 is transported by reversing means 55 for turning upside down and the first transporting means 51A so that the end surface on the traveling direction side of the substrate 1 after reversal is orthogonal to the traveling direction. The peeling film 11B is attached to the second conveying means 51B for conveying the substrate 1 in the direction perpendicular to the conveying direction of the first conveying means 51A and an adhesive layer on the polarizing plate. With The transmission axis direction of the polarizing plate is orthogonal to the transmission axis direction of the polarizing plate of the first strip film 10A when the release film 11B side and the release film 11A side of the first strip film 10A are combined. And the 2nd strip | belt-shaped film 10B supplied from the plate | board surface side on the opposite side to the surface where the said 1st film piece 19A of the said board | substrate 1 conveyed by the said 2nd conveyance means 51B was bonded is the longitudinal direction. When the cut surface on the traveling direction side orthogonal to the direction has traveled to a length corresponding to the substrate 1 transported by the second transport means 51B, the second strip film 10B is left as the release film 11B. The second cutting means 52B for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, and the second cutting means 52B cut out. The second release film separating means 53B for separating the release film 11B from the second film piece 19B, and the adhesive surface of the second film piece 19B from which the release film 11B is separated, The corresponding first film piece 19A of the substrate 1 is pasted so that the end surface on the traveling direction side of the substrate 1 conveyed by the conveying means 51B is parallel to the cut surface of the second film piece 19B. 2nd bonding means 54B bonded to the plate surface on the opposite side to the combined surface.
[0040]
The polarizing plate bonding apparatus 50 according to the third embodiment bonds the film piece 19 </ b> A from the lower side of the substrate 1 in FIGS. 6 to 9, inverts the substrate, and moves the film piece 19 </ b> A from the lower side of the substrate 1. Although it is bonded, the film piece 19A may be bonded from the upper side of the substrate 1, the substrate may be inverted, and the film piece 19A may be bonded from the upper side of the substrate 1, or the film piece from the lower side of the substrate 1 19A may be pasted and the film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be bonded from the lower side. If it is the polarizing plate bonding apparatus 50 of the type which bonds the film piece 19A from the lower side of the board | substrate 1 and inverts a board | substrate and bonds the film piece 19A from the lower side of the board | substrate 1, it will be the downward side of a strip | belt-shaped film. Therefore, there is an advantage that dust can be prevented from being mixed.
[0041]
Although the board | substrate 1 and strip | belt-shaped film 10A, 10B used in the polarizing plate bonding apparatus 50 which concerns on Embodiment 3 are the same as what is used in Embodiment 2, when the vertical and horizontal lengths of the board | substrate 1 differ, strip | belt shape. The film widths of the film 10 </ b> A and the strip-shaped film 10 </ b> B may be different from each other corresponding to the substrate 1. Thereby, since the unwinding roll by which the strip | belt-shaped film was wound can be distinguished by size (width), it is easy to distinguish also at the time of replacement | exchange of a roll. Moreover, when setting it as a circularly-polarizing film, the orientation axis | shaft of the retardation film of the 1st strip | belt-shaped film 10A and the orientation axis | shaft of the retardation film | membrane of the 2nd strip | belt-shaped film 10B are made the same. Thereby, the orientation axis | shaft of a phase difference film when a film piece is bonded on both surfaces of a board | substrate can be mutually orthogonally crossed, and it is possible to supply a strip | belt-shaped film continuously.
[0042]
Conveying means 51A, 51B, cutting means 52A, 52B, peeling film separating means 53A, 53B, bonding means 54A, 54B, unwinding rolls 56A, 56B, and winding rolls 57A, 57B according to Embodiment 3 are shown in FIG. And FIG. 9), which are substantially the same as the conveying means 36, the cutting means 31B, the release film separating means 32B, the bonding means 33, the unwinding roll 34B, and the winding roll 35B of the polarizing plate bonding apparatus according to Embodiment 1, respectively. Yes (see FIG. 1).
[0043]
In the bonding means 54 </ b> A of the third embodiment, the film piece 19 </ b> A is bonded only to one side of the substrate 1. In the bonding means 54 </ b> B, the film pieces 19 </ b> A and 19 </ b> B are apparently bonded to both surfaces of the substrate 1, but the film piece 19 </ b> B is substantially bonded to one surface of the substrate 1.
[0044]
When the direction of supplying the film pieces 19A and 19B is the same in the bonding means 54A and 54B, for example, the reversing means 55 supplies the film piece 19A from the lower surface side of the substrate by the first bonding means 54A, and the second Necessary when the film piece 19B is supplied from the lower surface side of the substrate by the bonding means 54B. In addition, when the direction which supplies film piece 19A, 19B opposes in the bonding means 54A, 54B, for example, the film piece 19A is bonded from the board | substrate lower surface by the 1st bonding means 54A, and it is the 2nd bonding means. When the film piece 19B is pasted from the upper surface of the substrate at 54B, the reversing means 55 is unnecessary.
[0045]
Embodiment 4 of the present invention will be described with reference to the drawings. FIG. 10: is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention. FIG. 11: is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention.
[0046]
The polarizing plate bonding apparatus according to Embodiment 4 can be roughly divided into a first transport unit, a reversing unit, and a second transport unit, similarly to the polarizing plate bonding apparatus according to Embodiment 3 shown in FIG. . In the 1st conveyance part, the board | substrate (1A of FIG. 7) supplied from the supply part is conveyed, the peeling film is isolate | separated from the polarizing plate unwound from the unwinding roll, and a polarizing plate is a board | substrate (FIG. 7). 1B) is bonded to the lower one surface, and the polarizing plate is cut at a predetermined position. In the reversing section, the substrate transported from the first transport section (the substrate on which the polarizing plate is bonded to the lower side; 1B in FIG. 7), the end surface on the traveling direction side of the substrate after reversing is the traveling direction Are turned upside down so as to be orthogonal to each other, and the inverted substrate (the substrate on which the polarizing plate is bonded to the upper surface; 1C in FIG. 7) is sent to the second transport unit. In the second transport unit, the substrate sent from the reversing unit (the substrate on which the polarizing plate is bonded to the upper one surface; 1D in FIG. 7) is orthogonal to the direction of the substrate transported by the first transport unit. The polarizing film unloaded from the unwinding roll is separated from the release film, and the polarizing plate is bonded to the lower side of the substrate (the substrate on which the polarizing plate is bonded to both sides; 1E in FIG. 7). Then, the polarizing plate is cut at a predetermined position.
[0047]
If it demonstrates in detail about the structure of the polarizing plate bonding apparatus which concerns on Embodiment 4 using FIG.10 and FIG.11, the polarizing plate bonding apparatus 60 makes one end surface of the board | substrate 1 orthogonal to a advancing direction, and the said board | substrate. 1st conveyance means 61A which conveys 1 and 1st peeling film separation which isolate | separates said peeling film 11A from 10 A of 1st strip | belt-shaped films with which peeling film 11A was stuck on the polarizing plate through the adhesive bond layer Means 62A and the adhesive surface of the first belt-like film 10A from which the release film 11A is separated, the traveling direction of the first belt-like film 10A is conveyed by the first carrier means 61A. The first bonding means 63A for bonding to the corresponding plate surface one side of the substrate 1 and the first bonding means 63A bonded to the substrate 1 by the first bonding means 63A so as to correspond to the transport direction. First cutting means 64A for cutting the belt-like film 10A in parallel with the front end face or the rear end face in the transport direction of the substrate 1 transported by the first transport means 61A, and the first The substrate 1 on which the first film piece 19A that has been transported by the transport means 61A is bonded is moved up and down so that the end surface on the traveling direction side of the substrate 1 after reversal is orthogonal to the traveling direction. Reversing means 65 for reversing, second transporting means 61B for transporting the substrate 1 transported by the first transporting means 61A in a direction perpendicular to the transporting direction of the first transporting means 61A, and polarization A release film 11B is stuck on the plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film 11B side and the release film of the first strip film 10A. The first film piece 19A of the substrate 1 that is orthogonal to the transmission axis direction of the polarizing plate of the first strip film 10A when combined with the 1A side and is transported by the second transport means 61B. The second release film separating means 62B for separating the release film 11B from the second belt-like film 10B supplied from the plate surface side opposite to the surface on which the release film is bonded, and the release film 11B is separated. The bonding surface of the second belt-like film 10B corresponds to the substrate 1 so that the traveling direction of the second belt-like film 10B corresponds to the transport direction of the substrate 1 transported by the second transport means 61B. The second laminating means 63B for laminating on the plate surface opposite to the surface where the film piece 19A of the first strip-shaped film 10A is pasted, and the second laminating means 63B The second belt-like film 10B bonded on the substrate 1 is cut in parallel with the front end surface or the rear end surface in the transport direction of the substrate 1 transported by the second transport means 61B. Two cutting means 64B.
[0048]
In FIG. 10 and FIG. 11, the polarizing plate bonding apparatus 60 according to the fourth embodiment bonds the film piece 19 </ b> A from the lower side of the substrate 1, inverts the substrate, and turns the film piece 19 </ b> A from the lower side of the substrate 1. Although it is bonded, the film piece 19A may be bonded from the upper side of the substrate 1, the substrate may be inverted, and the film piece 19A may be bonded from the upper side of the substrate 1, or the film piece from the lower side of the substrate 1 19A may be pasted and the film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be bonded from the lower side. If it is the polarizing plate bonding apparatus 50 of the type which bonds the film piece 19A from the lower side of the board | substrate 1 and inverts a board | substrate and bonds the film piece 19A from the lower side of the board | substrate 1, it will be the downward side of a strip | belt-shaped film. Therefore, there is an advantage that it is possible to prevent dust from being mixed.
[0049]
The board | substrate 1 and strip | belt-shaped film 10A, 10B which are used in the polarizing plate bonding apparatus 50 which concerns on Embodiment 4 are the same as what is used in Embodiment 3. FIG.
[0050]
Release film separating means 62A, 62B, bonding means 63A, 63B, unwinding rolls 66A, 66B, and winding rolls 67A, 67B according to Embodiment 4 (see FIGS. 10 and 11) are respectively related to Embodiment 3. It is substantially the same as peeling film separation means 53A, 53B, bonding means 54A, 54B, unwinding rolls 56A, 56B, and winding rolls 57A, 57B of the polarizing plate bonding apparatus (see FIGS. 8 and 9). Conveying means 61A and 61B according to the fourth embodiment (see FIGS. 10 and 11) are the same as the conveying means 46 according to the second embodiment (see FIG. 4). Unlike the cutting means according to the third embodiment, the cutting means 64A and 64B according to the fourth embodiment are arranged on a line on the downstream side of the bonding means 63A and 63B of the conveying means 61A and 61B. The strip films 10A and 10B are cut only on the lower surface side. In addition, in the bonding means 54, it is different by the point which bonds the strip | belt-shaped films 10A and 10B which are not cut | disconnected rather than a film piece on both surfaces of the board | substrate 1. FIG.
[0051]
【The invention's effect】
According to the present invention, the polarizing plate can be continuously and automatically bonded to both surfaces of the substrate.
[0052]
Moreover, according to this invention, it is not necessary to transfer a film piece, and since the peeling film is not cut | disconnected, it can speed up.
[0053]
Further, according to the present invention, since no unnecessary piece of polarizing plate is produced, a yield of 100% can be realized. As a result, the cost of the display device can be reduced.
[0054]
Moreover, according to this invention, when sticking a polarizing plate on both surfaces of the board | substrate for TN liquid crystals, management of the transmission-axis direction of a polarizing plate becomes easy.
[0055]
In addition, according to the present invention, the circularly polarizing plate film obtained by laminating the retardation film and the polarizing plate can be continuously pasted to the substrate, and the cut piece of the unnecessary circularly polarizing plate film does not come out. The yield of the circularly polarizing film can be 100%.
[0056]
Moreover, according to this invention, when bonding a polarizing plate on both surfaces of a board | substrate simultaneously, apparatus equipment can be made small.
[0057]
Moreover, according to this invention, while supplying a film piece from the downward side of the board | substrate conveyed, and half-cutting from the lower side surface of a strip | belt-shaped film, mixing of refuse can be prevented. Since the belt-like film is supplied from the lower side of the substrate to be transported, the roll of the belt-like film can be easily exchanged.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing a configuration of a polarizing plate laminating apparatus according to Embodiment 1 of the present invention.
2A is a plan view and FIG. 2B is a cross-sectional view showing the configuration of a strip film used in a polarizing plate laminating apparatus according to Embodiment 1 of the present invention.
FIG. 3 is a developed perspective view schematically showing the relationship between the stretching direction of a polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.
FIG. 4 is a side view schematically showing a configuration of a polarizing plate laminating apparatus according to Embodiment 2 of the present invention.
FIG. 5 is a developed perspective view schematically showing the relationship between the stretching direction of the polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.
FIG. 6 is a perspective view schematically showing a configuration of a polarizing plate laminating apparatus according to Embodiment 3 of the present invention.
FIG. 7 is a plan view schematically showing the configuration of a polarizing plate bonding apparatus according to Embodiment 3 of the present invention.
FIG. 8 is a side view schematically showing a configuration of a first transport unit of a polarizing plate bonding apparatus according to Embodiment 3 of the present invention.
FIG. 9 is a side view schematically showing a configuration of a second transport unit of a polarizing plate bonding apparatus according to Embodiment 3 of the present invention.
FIG. 10 is a side view schematically showing a configuration of a first transport unit of a polarizing plate bonding apparatus according to Embodiment 4 of the present invention.
FIG. 11 is a side view schematically showing a configuration of a second transport unit of a polarizing plate bonding apparatus according to Embodiment 4 of the present invention.
FIGS. 12A and 12B are a plan view and a cross-sectional view showing a configuration of a strip film used in a conventional polarizing plate laminating apparatus.
[Explanation of symbols]
1 Substrate
10, 10A, 10B Strip film
11, 11A, 11B Release film
12, 14 Adhesive layer
13 Retardation film
15, 17 Protective film
16 Polarizing plate
18 slip
19, 19A, 19B Film piece
30, 40 Polarizing plate bonding device
31A, 31B, 43 Cutting means
32A, 32B, 41A, 41B Peeling film separating means
33, 42 Pasting means
34A, 34B, 44A, 44B Unwinding roll
35A, 35B, 45A, 45B Winding roll
36, 46 Conveying means
50, 60 Polarizing plate bonding device
51A, 51B, 61A, 61B Conveying means
52A, 52B, 64A, 64B Cutting means
53A, 53B, 62A, 62B Peeling film separating means
54A, 54B, 63A, 63B Pasting means
55, 65 Inversion means
56A, 56B, 66A, 66B Unwinding roll
57A, 57B, 67A, 67B Winding roll

Claims (21)

偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、が、その長手方向に対し直交する進行方向側の切断面が基板に対応する長さまでそれぞれ進行したときに、前記第１の帯状フィルム及び前記第２の帯状フィルムをそれぞれ前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する切断手段と、
前記第１の帯状フィルムの前記切断により切り出された第１のフィルム片及び前記第２の帯状フィルムの前記切断により切り出された第２のフィルム片のそれぞれから前記剥離フィルムを分離する剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する裏側の板面に貼合する貼合手段と、
を備えることを特徴とする偏光板貼合装置。A release film is stuck on the polarizing plate via an adhesive layer, and the first belt-like film supplied from the front plate side of the substrate to be transported and the polarizing plate on the polarizing plate via the adhesive layer While the release film is attached, the transmission axis of the polarizing plate of the first belt-like film when the transmission axis direction of the polarizing plate matches the release film side and the release film side of the first belt-like film. The second strip-shaped film that is orthogonal to the direction and supplied from the back plate side of the substrate to be conveyed has a length corresponding to the substrate in which the cut surface on the traveling direction side that is orthogonal to the longitudinal direction corresponds to the substrate. When each of the first and second strip films has proceeded, the first strip film and the second strip film are cut to cut at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film. And the stage,
Release film separating means for separating the release film from each of the first film piece cut by the cutting of the first belt-like film and the second film piece cut by the cutting of the second belt-like film. When,
The adhesive surface of the first film piece from which the release film has been separated corresponds to the substrate so that the cut surface of the first film piece is parallel to the front end surface in the transport direction of the substrate. While bonding to the front plate surface, the adhesive surface of the second film piece from which the release film was separated, the cut surface of the second film piece being parallel to the front end surface in the transport direction of the substrate. A bonding means for bonding to the corresponding back side plate surface of the substrate,
A polarizing plate laminating apparatus comprising: 偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムがその長手方向に対し直交する進行方向側の切断面が基板に対応する長さまで進行したときに、前記第１の帯状フィルムを前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第１の切断手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムがその長手方向に対し直交する進行方向側の切断面が基板に対応する長さまで進行したときに、前記第２の帯状フィルムを前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第２の切断手段と、
前記第１の切断手段により前記第１の帯状フィルムから切り出された第１のフィルム片から前記剥離フィルムを分離する第１の剥離フィルム分離手段と、
前記第２の切断手段により前記第２の帯状フィルムから切り出された第２のフィルム片から前記剥離フィルムを分離する第２の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する裏側の板面に貼合する貼合手段と、
を備えることを特徴とする偏光板貼合装置。A release film is stuck on the polarizing plate via an adhesive layer, and the first belt-like film supplied from the front surface side of the substrate to be conveyed is on the traveling direction side orthogonal to the longitudinal direction. When the cut surface has traveled to a length corresponding to the substrate, the first strip-shaped film is cut at least in the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film. Cutting means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. Cutting on the traveling direction side of the second belt-shaped film that is orthogonal to the transmission axis direction of the polarizing plate of the first belt-shaped film and that is supplied from the plate surface side on the back side of the transported substrate is perpendicular to the longitudinal direction. When the surface has traveled to a length corresponding to the substrate, the second band-shaped film cuts at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film. Means,
A first release film separating means for separating the release film from a first film piece cut from the first strip film by the first cutting means;
Second release film separating means for separating the release film from the second film piece cut out from the second strip film by the second cutting means;
The adhesive surface of the first film piece from which the release film has been separated corresponds to the substrate so that the cut surface of the first film piece is parallel to the front end surface in the transport direction of the substrate. While bonding to the front plate surface, the adhesive surface of the second film piece from which the release film was separated, the cut surface of the second film piece being parallel to the front end surface in the transport direction of the substrate. A bonding means for bonding to the corresponding back side plate surface of the substrate,
A polarizing plate laminating apparatus comprising: 偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、のそれぞれから前記剥離フィルムを分離する剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する裏側の板面に貼合する貼合手段と、
前記貼合手段によって前記基板の両面に貼合された前記第１の帯状フィルム及び前記第２の帯状フィルムのそれぞれを、前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する切断手段と、
を備えることを特徴とする偏光板貼合装置。A release film is stuck on the polarizing plate via an adhesive layer, and the first belt-like film supplied from the front plate side of the substrate to be transported and the polarizing plate on the polarizing plate via the adhesive layer While the release film is attached, the transmission axis of the polarizing plate of the first belt-like film when the transmission axis direction of the polarizing plate matches the release film side and the release film side of the first belt-like film. A release film separating means for separating the release film from each of the second belt-like film that is orthogonal to the direction and that is supplied from the plate surface side on the back side of the substrate to be conveyed
The adhesive surface of the first strip film from which the release film has been separated is pasted on the corresponding front side plate surface of the substrate so that the traveling direction of the first strip film corresponds to the transport direction of the substrate. And the adhesive surface of the second strip-like film from which the release film has been separated, on the corresponding back side of the substrate so that the traveling direction of the second strip-shaped film corresponds to the transport direction of the substrate. Bonding means for bonding to the plate surface;
Each of the first strip film and the second strip film bonded to both surfaces of the substrate by the bonding means is parallel to the front end surface or the rear end surface in the transport direction of the substrate. Cutting means for cutting;
A polarizing plate laminating apparatus comprising: 偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムから前記剥離フィルムを分離する第１の剥離フィルム分離手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムから前記剥離フィルムを分離する第２の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する裏側の板面に貼合する貼合手段と、
前記貼合手段によって前記基板の両面に貼合された前記第１の帯状フィルム及び前記第２の帯状フィルムを、前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する切断手段と、
を備えることを特徴とする偏光板貼合装置。A release film is attached to the polarizing plate via an adhesive layer, and the first release film separates the release film from the first belt-like film supplied from the front side of the substrate to be conveyed. Separating means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. 2nd peeling film separation which isolate | separates the said peeling film from the 2nd strip | belt-shaped film supplied orthogonally from the transmission-axis direction of the polarizing plate of 1 strip | belt-shaped film, and the back side of the said board | substrate conveyed. Means,
The adhesive surface of the first strip film from which the release film has been separated is pasted on the corresponding front side plate surface of the substrate so that the traveling direction of the first strip film corresponds to the transport direction of the substrate. And the adhesive surface of the second strip-like film from which the release film has been separated, on the corresponding back side of the substrate so that the traveling direction of the second strip-shaped film corresponds to the transport direction of the substrate. Bonding means for bonding to the plate surface;
The first strip film and the second strip film bonded to both surfaces of the substrate by the bonding means are cut in parallel to the front end surface or the rear end surface in the transport direction of the substrate. Cutting means;
A polarizing plate laminating apparatus comprising: 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、
偏光板を有する第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記第１の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、前記基板の対応する板面片側に貼合する第１の貼合手段と、
前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、
偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記第２の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、前記基板の対応する前記第１のフィルム片が貼合された面と反対側の板面に貼合する第２の貼合手段と、
を備えることを特徴とする偏光板貼合装置。First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The bonding surface of the first film piece having the polarizing plate is arranged such that the cut surface of the first film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the first conveying means. First bonding means for bonding to one side of the corresponding plate surface;
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece Adhesion of a second film piece which is orthogonal to the direction and which is supplied from the plate surface side opposite to the surface on which the first film piece of the substrate conveyed by the second conveying means is bonded. The corresponding first film piece of the substrate is attached so that the cut surface of the second film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the second conveying means. A second laminating means for laminating to the plate surface opposite to the mated surface;
A polarizing plate laminating apparatus comprising: 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着された第１の帯状フィルムがその長手方向に対し直交する進行方向側の切断面が前記基板に対応する長さまで進行したときに、前記第１の帯状フィルムを前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第１の切断手段と、
前記第１の切断手段の切断により切り出された第１のフィルム片から前記剥離フィルムを分離する第１の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１の搬送手段によって搬送される基板の進行方向の前方側の端面と前記第１のフィルム片の切断面が平行になるように、当該基板の対応する板面片側に貼合する第１の貼合手段と、
前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムがその長手方向に対し直交する進行方向側の切断面が前記第２の搬送手段によって搬送される前記基板に対応する長さまで進行したときに、前記第２の帯状フィルムを前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する第２の切断手段と、
前記第２の切断手段の切断により切り出された第２のフィルム片から前記剥離フィルムを分離する第２の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２の搬送手段によって搬送されてきた前記基板の進行方向側の端面と前記第２のフィルム片の切断面が平行になるように、当該基板の対応する前記第１のフィルム片が貼合された面と反対側の板面に貼合する第２の貼合手段と、
を備えることを特徴とする偏光板貼合装置。First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
When the cut surface on the traveling direction side perpendicular to the longitudinal direction of the first strip-shaped film having the release film attached to the polarizing plate via the adhesive layer has traveled to a length corresponding to the substrate, First cutting means for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the first strip-shaped film leaving the release film;
First release film separating means for separating the release film from the first film piece cut out by the cutting of the first cutting means;
The bonding surface of the first film piece from which the release film is separated is parallel to the front end surface in the traveling direction of the substrate conveyed by the first conveying means and the cut surface of the first film piece. First bonding means for bonding to the corresponding plate surface one side of the substrate,
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. From the plate surface side opposite to the surface on which the first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the belt-shaped film 1 and is conveyed by the second conveying means is bonded. When the second belt-like film to be fed advances to a length corresponding to the substrate transported by the second transport means, the second belt-like film has a cut surface on the traveling direction side orthogonal to the longitudinal direction. A second cutting means for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction leaving the release film,
Second release film separating means for separating the release film from the second film piece cut out by the cutting of the second cutting means;
The bonding surface of the second film piece from which the release film has been separated is parallel to the end surface on the traveling direction side of the substrate that has been conveyed by the second conveying means and the cut surface of the second film piece. The second bonding means for bonding to the plate surface opposite to the surface to which the corresponding first film piece of the substrate is bonded;
A polarizing plate laminating apparatus comprising: 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、
偏光板を有する第１の帯状フィルムの接着面が、前記第１の帯状フィルムの進行方向が前記第１の搬送手段によって搬送される基板の進行方向側の端面と平行になるように、対応する板面片側に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第１の切断手段と、
前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、
偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムの接着面が、前記第２の帯状フィルムの切断面が前記第２の搬送手段のライン上で搬送される基板の進行方向側の端面と平行になるように、対応する前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第２の切断手段と、
を備えることを特徴とする偏光板貼合装置。First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The adhesive surface of the first strip film having the polarizing plate corresponds so that the traveling direction of the first strip film is parallel to the end surface on the traveling direction side of the substrate transported by the first transport means. A first cutting means for cutting in parallel with an end face on the front side in the transport direction of the substrate bonded to one side of the plate surface or an end face on the rear side thereof;
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece A second belt shape which is orthogonal to the direction and which is supplied from the plate surface side opposite to the surface on which the film piece of the first belt film of the substrate transported by the second transport means is bonded. The corresponding first belt-like shape is such that the adhesive surface of the film is parallel to the end surface on the traveling direction side of the substrate transported on the line of the second transport means, the cut surface of the second belt-shaped film. A second cutting means for cutting in parallel with an end surface on the front side in the transport direction of the substrate or a rear end surface thereof, which is bonded to the plate surface opposite to the surface on which the film piece of the film is bonded;
A polarizing plate laminating apparatus comprising: 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する第１の搬送手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着された第１の帯状フィルムから前記剥離フィルムを分離する第１の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記第１の搬送手段によって搬送される前記基板の進行方向と対応するように、当該基板の対応する板面片側に貼合する第１の貼合手段と、
前記第１の貼合手段によって前記基板上に貼合された前記第１の帯状フィルムを、前記第１の搬送手段によって搬送される前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第１の切断手段と、
前記第１の搬送手段によって搬送されてきた前記基板を前記第１の搬送手段の搬送方向に対し直交する方向に搬送する第２の搬送手段と、
偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、前記第２の搬送手段によって搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムから前記剥離フィルムを分離する第２の剥離フィルム分離手段と、
前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記第２の搬送手段によって搬送される前記基板の進行方向と対応するように、当該基板の対応する前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面に貼合する第２の貼合手段と、
前記第２の貼合手段によって前記基板上に貼合された前記第２の帯状フィルムを前記第２の搬送手段によって搬送される前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する第２の切断手段と、
を備えることを特徴とする偏光板貼合装置。First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
A first release film separating means for separating the release film from the first belt-like film in which the release film is stuck on the polarizing plate via an adhesive layer;
The adhesion surface of the first belt-like film from which the release film has been separated is such that the traveling direction of the first belt-like film corresponds to the traveling direction of the substrate transported by the first transporting means. A first laminating means for laminating to a corresponding plate surface one side of the substrate;
An end face on the front side or an end face on the rear side in the transport direction of the substrate, which is transported by the first transport means, the first strip-shaped film pasted on the substrate by the first pasting means. First cutting means for cutting in parallel with,
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. From the plate surface side opposite to the surface on which the first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the belt-shaped film 1 and is conveyed by the second conveying means is bonded. A second release film separating means for separating the release film from the supplied second belt-shaped film;
The adhesive surface of the second strip film from which the release film has been separated is such that the traveling direction of the second strip film corresponds to the traveling direction of the substrate transported by the second transport means. A second laminating means for laminating on the plate surface opposite to the surface on which the film piece of the first strip-shaped film corresponding to the substrate is bonded;
An end face on the front side in the transport direction of the substrate transported by the second transport means or an end face on the rear side of the second belt-shaped film pasted on the substrate by the second pasting means A second cutting means for cutting in parallel;
A polarizing plate laminating apparatus comprising: 前記基板には略方形で一定サイズの基板を用い、
前記第１の搬送手段及び第２の搬送手段は、複数の前記基板を進行方向に直列に配列して搬送することを特徴とする請求項５乃至８のいずれか一に記載の偏光板貼合装置。The substrate is a substantially square and constant size substrate,
The polarizing plate bonding according to any one of claims 5 to 8, wherein the first transport unit and the second transport unit transport a plurality of the substrates arranged in series in a traveling direction. apparatus. 前記第１の搬送手段によって搬送されてきた前記第１のフィルム片が貼合された前記基板を、反転後の前記基板の進行方向側の端面が進行方向に対して直交するように、上下反転させる反転手段を備えることを特徴とする請求項５乃至９のいずれか一に記載の偏光板貼合装置。The substrate on which the first film piece that has been transported by the first transport unit is bonded is turned upside down so that the end surface on the traveling direction side of the substrate after reversal is orthogonal to the traveling direction The polarizing plate bonding apparatus according to any one of claims 5 to 9, further comprising a reversing unit that performs the reversing unit. 前記第１の搬送手段及び前記第２の搬送手段は、基板の板面を水平にして搬送し、
前記第１の切断手段及び前記第２の切断手段は、前記第１の搬送手段及び前記第２の搬送手段で搬送される基板より下側に配設され、
前記第１の貼合手段は、前記第１の搬送手段で搬送される基板の下方側から供給された前記第１のフィルム片を前記基板に貼合し、
前記第２の貼合手段は、前記第２の搬送手段で搬送される基板の下方側から供給された前記第２のフィルム片を前記基板に貼合することを特徴とする請求項１０記載の偏光板貼合装置。The first transport unit and the second transport unit transport the board surface of the substrate horizontally,
The first cutting means and the second cutting means are disposed below the substrate conveyed by the first conveying means and the second conveying means,
The first bonding means bonds the first film piece supplied from the lower side of the substrate conveyed by the first conveying means to the substrate,
The said 2nd bonding means bonds the said 2nd film piece supplied from the downward side of the board | substrate conveyed by the said 2nd conveyance means to the said board | substrate. Polarizing plate bonding device. 前記第１の切断手段及び前記第２の切断手段は、供給される帯状フィルムの下方側の面から切り込むことを特徴とする請求項１０又は１１記載の偏光板貼合装置。The polarizing plate laminating apparatus according to claim 10 or 11, wherein the first cutting means and the second cutting means are cut from a lower surface of the supplied belt-like film. 前記第１の搬送手段及び第２の搬送手段は、ローラを並べたローラコンベア又はホイールを並べたホイールコンベアであることを特徴とする請求項５乃至１２のいずれか一に記載の偏光板貼合装置。The polarizing plate bonding according to any one of claims 5 to 12, wherein the first conveying means and the second conveying means are a roller conveyor in which rollers are arranged or a wheel conveyor in which wheels are arranged. apparatus. 前記第１の帯状フィルムは、前記偏光板と前記接着剤層の間に、フィルム長手方向に対し直交又は平行する配向軸を有する位相差膜が介在し、
前記第２の帯状フィルムは、フィルム長手方向に対し前記第１の帯状フィルムの位相差膜の配向軸と同一方向の配向軸を有する位相差膜が介在することを特徴とする請求項５乃至１３のいずれか一に記載の偏光板貼合装置。In the first strip film, a retardation film having an alignment axis perpendicular or parallel to the film longitudinal direction is interposed between the polarizing plate and the adhesive layer,
14. The retardation film having an orientation axis in the same direction as the orientation axis of the retardation film of the first belt film is interposed in the second belt-like film with respect to the film longitudinal direction. The polarizing plate bonding apparatus as described in any one of these. 前記第１の帯状フィルムの偏光板には、透過軸がフィルム長手方向に対して斜めに配向された偏光板を用いることを特徴とする請求項１乃至１４のいずれか一に記載の偏光板貼合装置。The polarizing plate pasting as described in any one of Claims 1 thru | or 14 used for the polarizing plate of a said 1st strip | belt-shaped film using the polarizing plate in which the transmission axis was diagonally oriented with respect to the film longitudinal direction. Combined device. 前記第１の帯状フィルムの偏光板には、透過軸がフィルム長手方向に対して平行に配向された偏光板を用いることを特徴とする請求項１乃至１４のいずれか一に記載の偏光板貼合装置。The polarizing plate pasting as described in any one of Claims 1 thru | or 14 using the polarizing plate by which the transmission axis was orientated in parallel with the film longitudinal direction as a polarizing plate of a said 1st strip | belt-shaped film. Combined device. 前記第１の帯状フィルムの偏光板には、透過軸がフィルム長手方向に対して直角に配向された偏光板を用いることを特徴とする請求項１乃至１４のいずれか一に記載の偏光板貼合装置。The polarizing plate pasting as described in any one of Claims 1 thru | or 14 using the polarizing plate by which the transmission axis was orientated at right angles with respect to the film longitudinal direction for the polarizing plate of a said 1st strip | belt-shaped film. Combined device. 偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、が、その長手方向に対し直交する進行方向側の切断面が基板に対応する長さまでそれぞれ進行したときに、前記第１の帯状フィルム及び前記第２の帯状フィルムをそれぞれ前記剥離フィルムを残して少なくとも前記偏光板及び前記接着剤層を長手方向に対し直交する方向に切断する工程と、
前記第１の帯状フィルムの前記切断により切り出された第１のフィルム片及び前記第２の帯状フィルムの前記切断により切り出された第２のフィルム片のそれぞれから前記剥離フィルムを分離する工程と、
前記剥離フィルムが分離された前記第１のフィルム片の接着面を、前記第１のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２のフィルム片の接着面を、前記第２のフィルム片の切断面が前記基板の搬送方向の前方側の端面と平行になるように、当該基板の対応する裏側の板面に貼合する工程と、
を含むことを特徴とする偏光板貼合方法。A release film is stuck on the polarizing plate via an adhesive layer, and the first belt-like film supplied from the front plate side of the substrate to be transported and the polarizing plate on the polarizing plate via the adhesive layer While the release film is attached, the transmission axis of the polarizing plate of the first belt-like film when the transmission axis direction of the polarizing plate matches the release film side and the release film side of the first belt-like film. The second strip-shaped film that is orthogonal to the direction and supplied from the back plate side of the substrate to be conveyed has a length corresponding to the substrate in which the cut surface on the traveling direction side that is orthogonal to the longitudinal direction corresponds to the substrate. Step of cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film for the first and second strip films, respectively ,
Separating the release film from each of the first film piece cut by the cutting of the first belt-like film and the second film piece cut by the cutting of the second belt-like film;
The adhesive surface of the first film piece from which the release film has been separated corresponds to the substrate so that the cut surface of the first film piece is parallel to the front end surface in the transport direction of the substrate. While bonding to the front plate surface, the adhesive surface of the second film piece from which the release film was separated, the cut surface of the second film piece being parallel to the front end surface in the transport direction of the substrate. A step of bonding to the corresponding back side plate surface of the substrate,
The polarizing plate bonding method characterized by including. 偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、搬送される基板の表側の板面側から供給される第１の帯状フィルムと、偏光板上に接着剤層を介して剥離フィルムが貼着されるとともに、当該偏光板の透過軸方向が当該剥離フィルム側と前記第１の帯状フィルムの剥離フィルム側とを合わせたときの前記第１の帯状フィルムの偏光板の透過軸方向と直交し、かつ、搬送される前記基板の裏側の板面側から供給される第２の帯状フィルムと、のそれぞれから前記剥離フィルムを分離する工程と、
前記剥離フィルムが分離された前記第１の帯状フィルムの接着面を、前記第１の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する表側の板面に貼合するとともに、前記剥離フィルムが分離された前記第２の帯状フィルムの接着面を、前記第２の帯状フィルムの進行方向が前記基板の搬送方向と対応するように、当該基板の対応する裏側の板面に貼合する工程と、
前記貼合手段によって前記基板の両面に貼合された前記第１の帯状フィルム及び前記第２の帯状フィルムのそれぞれを、前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、
を含むことを特徴とする偏光板貼合方法。A release film is stuck on the polarizing plate via an adhesive layer, and the first belt-like film supplied from the front plate side of the substrate to be transported and the polarizing plate on the polarizing plate via the adhesive layer While the release film is attached, the transmission axis of the polarizing plate of the first belt-like film when the transmission axis direction of the polarizing plate matches the release film side and the release film side of the first belt-like film. A step of separating the release film from each of the second belt-like film that is orthogonal to the direction and that is supplied from the back plate side of the substrate to be conveyed;
The adhesive surface of the first strip film from which the release film has been separated is pasted on the corresponding front side plate surface of the substrate so that the traveling direction of the first strip film corresponds to the transport direction of the substrate. And the adhesive surface of the second strip-like film from which the release film has been separated, on the corresponding back side of the substrate so that the traveling direction of the second strip-shaped film corresponds to the transport direction of the substrate. A step of bonding to the plate surface;
Each of the first strip film and the second strip film bonded to both surfaces of the substrate by the bonding means is parallel to the front end surface or the rear end surface in the transport direction of the substrate. Cutting, and
The polarizing plate bonding method characterized by including. 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する工程と、
偏光板を有する第１のフィルム片の接着面を、前記第１のフィルム片の切断面が基板の搬送方向の前方側の端面と平行になるように、前記基板の対応する板面片側に貼合する工程と、
搬送されてきた前記基板をその搬送方向に対し直交する方向に変更して搬送する工程と、
偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、搬送される前記基板の前記第１のフィルム片が貼合された面と反対側の板面側から供給される第２のフィルム片の接着面を、前記第２のフィルム片の切断面が基板の搬送方向の前方側の端面と平行になるように、前記基板の対応する前記第１のフィルム片が貼合された面と反対側の板面に貼合する工程と、
を含むことを特徴とする偏光板貼合方法。Transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
Adhere the adhesive surface of the first film piece having the polarizing plate to the corresponding plate surface piece side of the substrate so that the cut surface of the first film piece is parallel to the front end surface in the substrate transport direction. Combining steps;
A step of changing and transferring the substrate that has been transferred in a direction perpendicular to the transfer direction;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece An adhesive surface of the second film piece that is orthogonal to the direction and is supplied from the plate surface side opposite to the surface on which the first film piece of the substrate to be conveyed is bonded is the second The process of bonding to the board surface on the opposite side to the surface where the said 1st film piece corresponding to the said board | substrate was bonded so that the cut surface of a film piece may become parallel to the end surface of the front side of the conveyance direction of a board | substrate. When,
The polarizing plate bonding method characterized by including. 基板の一つの端面を進行方向に対し直交させて前記基板を搬送する工程と、
偏光板を有する第１の帯状フィルムの接着面が、前記第１の帯状フィルムの進行方向が前記基板の搬送方向の前方側の端面と平行になるように、対応する板面片側に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、
搬送されてきた前記基板をその搬送方向に対し直交する方向に変更して搬送する第２の搬送工程と、
偏光板を有するとともに、当該偏光板の透過軸方向が当該偏光板の接着面側と前記第１のフィルム片の接着面側とを合わせたときの前記第１のフィルム片の偏光板の透過軸方向と直交し、かつ、前記基板の前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面側から供給される第２の帯状フィルムの接着面が、前記第２の帯状フィルムの切断面が前記基板の搬送方向の前方側の端面と平行になるように、対応する前記第１の帯状フィルムのフィルム片が貼合された面と反対側の板面に貼合された前記基板の搬送方向の前方側の端面若しくはその後方側の端面と平行に切断する工程と、
を含むことを特徴とする偏光板貼合方法。Transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The adhesive surface of the first strip film having a polarizing plate is bonded to one side of the corresponding plate surface so that the traveling direction of the first strip film is parallel to the front end surface in the transport direction of the substrate. Cutting the substrate parallel to the front end surface or the rear end surface thereof in the transport direction;
A second transport step for transporting the substrate that has been transported in a direction orthogonal to the transport direction;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece The adhesive surface of the second belt-shaped film that is orthogonal to the direction and is supplied from the plate surface side opposite to the surface on which the film piece of the first belt-shaped film of the substrate is bonded is the second surface. It is bonded to the plate surface on the opposite side to the surface on which the corresponding film piece of the first band-shaped film is bonded so that the cut surface of the band-shaped film is parallel to the end surface on the front side in the transport direction of the substrate. Cutting the substrate parallel to the front end surface or the rear end surface thereof in the transport direction;
The polarizing plate bonding method characterized by including.
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