JP2022062963A - Cut line forming device and cut line forming method - Google Patents

Cut line forming device and cut line forming method Download PDF

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Publication number
JP2022062963A
JP2022062963A JP2020171197A JP2020171197A JP2022062963A JP 2022062963 A JP2022062963 A JP 2022062963A JP 2020171197 A JP2020171197 A JP 2020171197A JP 2020171197 A JP2020171197 A JP 2020171197A JP 2022062963 A JP2022062963 A JP 2022062963A
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cut line
optical film
film laminate
transport direction
line forming
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JP6931413B1 (en
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清貴 堤
Kiyotaka Tsutsumi
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Nitto Denko Corp
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Nitto Denko Corp
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Priority to JP2020171197A priority Critical patent/JP6931413B1/en
Priority to PCT/JP2021/014914 priority patent/WO2022074864A1/en
Priority to CN202180003509.XA priority patent/CN115103746B/en
Priority to KR1020217039744A priority patent/KR102507580B1/en
Priority to TW110113675A priority patent/TWI765664B/en
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Publication of JP6931413B1 publication Critical patent/JP6931413B1/en
Publication of JP2022062963A publication Critical patent/JP2022062963A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/157—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
    • B26D1/18—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable carriage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/34—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier scanning being effected by a photosensitive device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/06—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with blade, e.g. shear-blade, cutters or perforators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
    • B32B2041/04—Detecting wrong registration, misalignment, deviation, failure

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Collation Of Sheets And Webs (AREA)

Abstract

To provide a cut line forming device and a cut line forming method capable of forming a cut line with high precision without adopting a large and complicated constitution.SOLUTION: A cut forming line apparatus 1 is provided for continuously forming cut lines CL1 and CL2 extending in a width direction on a long web shaped optical film laminate PL. The cut line forming device 1 includes a cut line forming section 10, a conveying direction changing section 20, and a cut line detecting section 30. The cut line forming section 10 forms the cut line CL1 in the optical film laminate PL which is conveyed horizontally from a surface opposite to a carrier film. The conveying direction changing section 20 is disposed on a downstream side in a conveying direction from the cut line forming section 10, and changes the conveying direction of the optical film laminate PL after forming the cut line at a predetermined angle. The cut line detecting section 30 is disposed on the downstream side in the conveying direction from the conveying direction changing section 20, and detects the cut line CL2 formed in the optical film laminate PL.SELECTED DRAWING: Figure 2

Description

本発明は、光学フィルム積層体に切込線を連続的に形成するための切込線形成装置に関し、より具体的には、水平方向に搬送される光学フィルム積層体に切込線を形成した後、光学フィルム積層体を縦方向に搬送し、縦方向に搬送される光学フィルム積層体の切込線形成位置を検出することによって、高精度の切込線形成を可能にする切込線の形成装置及び形成方法に関する。 The present invention relates to a cut line forming apparatus for continuously forming a cut line in an optical film laminate, and more specifically, a cut line is formed in an optical film laminate conveyed in a horizontal direction. After that, the optical film laminate is conveyed in the vertical direction, and the cut line formation position of the optical film laminate conveyed in the vertical direction is detected, so that the cut line can be formed with high accuracy. The present invention relates to a forming apparatus and a forming method.

近年、液晶表示装置などの光学的表示装置の製造工程において、キャリアフィルム上に粘着剤層を介して連続的に支持された複数の光学フィルムのシートのうち、欠点の存在しない正常なシートのみを、粘着剤層と共にキャリアフィルムから順次剥離し、粘着剤層を介してパネル部材と貼り合わせることによって、光学的表示装置を連続的に製造する方式が提案されている。こうした方式を実現するための製造システムは、例えば特許文献１に記載されている。 In recent years, in the manufacturing process of an optical display device such as a liquid crystal display device, among a plurality of optical film sheets continuously supported on a carrier film via an adhesive layer, only a normal sheet having no defects is selected. , A method has been proposed in which an optical display device is continuously manufactured by sequentially peeling from a carrier film together with an adhesive layer and bonding to a panel member via the adhesive layer. A manufacturing system for realizing such a method is described in, for example, Patent Document 1.

特許文献１に記載の製造システムにおいては、長尺ウェブ状の光学フィルムと長尺ウェブ状のキャリアフィルムとが粘着剤層を介して積層された長尺ウェブ状の光学フィルム積層体が用いられる。光学フィルム積層体には、予め実施された欠点検査の結果に基づいて決定される位置に、台座に対向して配置された切込線形成手段を用いて幅方向の切込線が連続的に形成される。これにより、長さ方向に隣接する２つの切込線の間に、キャリアフィルム上に連続的に支持された複数の光学フィルムのシートが形成される。光学フィルムのシートは、キャリアフィルムに支持された状態で貼合装置に送り込まれ、粘着剤層と共にキャリアフィルムから剥離された後、パネル部材に貼り合わされる。こうした光学的表示装置の製造システムは、予め切り出された光学フィルムのシートをパネル部材に貼り合わせる個別貼りシステムと区別して、「連続貼り（ＲＴＰ；ロール・ツー・パネル）システム」といわれる。 In the manufacturing system described in Patent Document 1, a long web-shaped optical film laminate in which a long web-shaped optical film and a long web-shaped carrier film are laminated via an adhesive layer is used. In the optical film laminate, cut lines in the width direction are continuously formed at positions determined based on the results of defect inspections performed in advance by using a cut line forming means arranged opposite to the pedestal. It is formed. As a result, a plurality of sheets of optical film continuously supported on the carrier film are formed between two cut lines adjacent to each other in the length direction. The sheet of the optical film is sent to the bonding device in a state of being supported by the carrier film, peeled from the carrier film together with the adhesive layer, and then bonded to the panel member. Such an optical display device manufacturing system is referred to as a "continuous pasting (RTP) system" in distinction from an individual pasting system in which a sheet of an optical film cut out in advance is bonded to a panel member.

近年、光学的表示装置は大型化が進んでおり、大型化に伴って、用いられる光学フィルムのシートやパネル部材のサイズも大きくなっている。同時に、光学的表示装置の薄型化及び挟額縁化も要求されるようになっており、これに伴ってパネル部材と光学フィルムのシートとをより高精度に貼り合わせることが求められ、このことは大型の光学的表示装置においても同様である。ＲＴＰシステムにおいて大型の光学フィルムとパネル部材との高精度の貼り合わせを実現するためには、光学フィルム積層体の長さ方向に沿って連続的に形成される切込線の位置を、製造工程の間、継続的に精度よく決定する必要がある。 In recent years, optical display devices have been increasing in size, and along with the increase in size, the sizes of optical film sheets and panel members used have also increased. At the same time, there is a demand for thinner optical display devices and narrower frames, and along with this, it is required to bond the panel member and the optical film sheet with higher accuracy. The same applies to a large optical display device. In order to realize high-precision bonding of a large optical film and a panel member in an RTP system, the position of the cut line continuously formed along the length direction of the optical film laminate is determined in the manufacturing process. During that time, it is necessary to make continuous and accurate decisions.

従来のＲＴＰシステムにおいては、連続的に形成される切込線の位置を継続的に精度よく決定するために、切込線形成手段によって形成された切込線を、切込線形成手段の下流側に配置された切込線検出手段によって検出して、形成された切込線の位置を求め、その結果に基づいて切込線形成手段を制御することが行われている。例えば、特許文献２には、光学部材シートのカット位置より下流側にカットラインを検出する検出カメラを設け、検出されたカットラインの位置に応じて切断装置を移動させることによって、カット位置と検出位置との間の距離を調整する技術が開示されている。 In a conventional RTP system, in order to continuously and accurately determine the position of a continuously formed cut line, the cut line formed by the cut line forming means is placed downstream of the cut line forming means. It is detected by the cut line detecting means arranged on the side, the position of the formed cut line is obtained, and the cut line forming means is controlled based on the result. For example, in Patent Document 2, a detection camera for detecting a cut line is provided on the downstream side of the cut position of the optical member sheet, and the cutting device is moved according to the position of the detected cut line to detect the cut position. Techniques for adjusting the distance to a position are disclosed.

特許第４３７７９６４号公報Japanese Patent No. 4377964 特開２０１３－１１４２２７号公報Japanese Unexamined Patent Publication No. 2013-114227

従来のＲＴＰシステムでは、通常、切込線の形成位置から形成された切込線の検出位置まで、光学フィルム積層体が水平方向に搬送されるように構成されており、その間で光学フィルム積層体を支持する機構が配置されていない。そのため、特に隣接する切込線の間の距離が長い大型の光学フィルムの場合には、切込線の形成位置から検出位置までの間で光学フィルム積層体が自重で撓み、隣接する切込線の間の長さと予め設定された光学フィルム長さとの間で誤差が発生する場合がある。光学フィルム積層体の張力を増大させれば誤差を解消することは可能となるが、張力を増大させることによって光学フィルム積層体の延伸や破断などの恐れが生じる。 In a conventional RTP system, the optical film laminate is usually configured to be horizontally conveyed from the position where the cut line is formed to the position where the cut line is detected, and the optical film laminate is conveyed between them. There is no mechanism to support it. Therefore, especially in the case of a large optical film in which the distance between adjacent cut lines is long, the optical film laminate bends due to its own weight from the position where the cut lines are formed to the detection position, and the adjacent cut lines are formed. An error may occur between the length between and the preset optical film length. Although it is possible to eliminate the error by increasing the tension of the optical film laminate, increasing the tension may cause stretching or breakage of the optical film laminate.

特許文献２に開示された技術は、切込線の形成位置から形成された切込線の検出位置まで、光学フィルム積層体が垂直に搬送されるように構成されたものである。このような構成の場合には、切込線の形成位置と検出位置との間で光学フィルム積層体の撓みが生じないため、隣接する切込線の間の長さと予め設定された光学フィルム長さとの間で誤差が発生しにくい。しかし、特許文献２に開示されるように鉛直方向の回転軸の回りに回転する円形刃物を用いて、鉛直方向に搬送される光学フィルム積層体に切込線を形成しようとすると、実際の装置構成のもとでは、切込線形成手段が重厚で取り扱い難いといった問題があり、それに加えて、切込線形成位置の調整が困難であること、及び、切込線の位置調整のための機構が大掛かりなものになることといった問題もある。 The technique disclosed in Patent Document 2 is configured so that the optical film laminate is vertically conveyed from the position where the cut line is formed to the position where the cut line is detected. In such a configuration, since the optical film laminate does not bend between the cut line formation position and the detection position, the length between the adjacent cut lines and the preset optical film length It is unlikely that an error will occur between the optics and the optics. However, as disclosed in Patent Document 2, when a circular blade that rotates around a rotation axis in the vertical direction is used to form a cut line in an optical film laminate that is conveyed in the vertical direction, an actual apparatus is used. Under the configuration, there is a problem that the cut line forming means is heavy and difficult to handle, in addition, it is difficult to adjust the cut line forming position, and a mechanism for adjusting the position of the cut line. There is also the problem that it becomes a large-scale one.

通常のＲＴＰシステムにおいて切込線を形成するための切込線形成ユニット（図２において参照番号１０で示される）は、搬送される光学フィルム積層体の主面に水平な回転軸を有する円形刃物（すなわち、円形刃物の回転面は光学フィルム積層体の主面に対して直交する）と、円形刃物を回転させるためのモータを含む駆動機構と、光学フィルム積層体を挟んで円形刃物とは反対側に配置された台座とを備える。円形刃物及び駆動機構は、モータ及びガイドレールを含む第１の移動機構によって、光学フィルム積層体の主面に対して直交する方向に移動させることができ、モータ及びガイドレールを含む第２の移動機構によって、光学フィルム積層体の主面を横切る方向に移動させることができる。円形刃物、駆動機構、第１の移動機構、及び第２の移動機構は、支持部によって支持される。この支持部は、支持部の側面において円形刃物、駆動機構、第１の移動機構、及び第２の移動機構を支持するように構成される。光学フィルム積層体に切込線を形成する位置は、例えば、支持部を円形刃物及び駆動機構とともに光学フィルム積層体の搬送方向に移動させたり、支持部を固定して円形刃物及び移動機構を移動させたり、フィードローラなどのフィルム駆動手段によって光学フィルム積層体の繰り出し量を変化させたりすることによって、調整することができる。 The cut line forming unit (indicated by reference numeral 10 in FIG. 2) for forming a cut line in a normal RTP system is a circular blade having a rotation axis horizontal to the main surface of the optical film laminate to be conveyed. (That is, the rotating surface of the circular blade is orthogonal to the main surface of the optical film laminate), and the drive mechanism including the motor for rotating the circular blade is opposite to the circular blade with the optical film laminate sandwiched between them. It has a pedestal arranged on the side. The circular blade and drive mechanism can be moved in a direction orthogonal to the main surface of the optical film laminate by a first movement mechanism including a motor and a guide rail, and a second movement including the motor and the guide rail. The mechanism allows the optical film laminate to be moved across the main surface. The circular blade, the drive mechanism, the first moving mechanism, and the second moving mechanism are supported by the support portion. The support portion is configured to support a circular blade, a drive mechanism, a first moving mechanism, and a second moving mechanism on the side surface of the support portion. The position where the cut line is formed in the optical film laminate is, for example, the support portion is moved in the transport direction of the optical film laminate together with the circular blade and the drive mechanism, or the support portion is fixed and the circular blade and the movement mechanism are moved. The adjustment can be made by changing the feeding amount of the optical film laminate by using a film driving means such as a feed roller.

こうした構造の切込線形成ユニットを用いて、鉛直方向に搬送される光学フィルム積層体に切込線を形成しようとする場合には、切込線形成ユニットの支持部は、その一端部のみが鉛直方向に延びるフレームなどに固定された「片持ち梁」状態で水平方向に延びるように配置されることになる。片持ち辺状態の支持部は、支持部に支持される円形刃物、駆動機構並びに第１及び第２の移動機構の重量の影響を受けて撓む可能性がある。支持部が撓まないように剛性を向上させることも考えられるが、そうすると切込線形成ユニットの重量が大きくなり、重厚な切込線形成ユニットを支えるためのフレームを補強する必要が生じ、設備が大掛かりで高コストなものとなる。さらに、切込線形成ユニットを移動させて光学フィルム積層体に切込線を形成する位置を調整する場合には、片持ち梁状態の重量物である支持部を上下に移動させる必要があるため、支持部を鉛直方向に移動させる移動機構が大掛かりなものになったり、切込線形成位置の微調整が困難となったりするといった問題がある。 When an attempt is made to form a cut wire in an optical film laminate conveyed in the vertical direction using a cut wire forming unit having such a structure, only one end of the support portion of the cut wire forming unit is formed. It will be arranged so as to extend in the horizontal direction in a "cantilever" state fixed to a frame or the like extending in the vertical direction. The cantilevered support may bend under the influence of the weight of the circular blade supported by the support, the drive mechanism, and the first and second moving mechanisms. It is possible to improve the rigidity so that the support part does not bend, but this will increase the weight of the cut wire forming unit, and it will be necessary to reinforce the frame for supporting the heavy cut wire forming unit, and the equipment Is large and expensive. Further, when moving the cut line forming unit to adjust the position of forming the cut line in the optical film laminate, it is necessary to move the support portion, which is a heavy object in the cantilever state, up and down. There are problems that the moving mechanism for moving the support portion in the vertical direction becomes large-scale, and it becomes difficult to finely adjust the cutting line forming position.

本発明は、大掛かりで複雑な構成を採用することなく、高精度の切込線形成を可能にする切込線の形成装置及び切込線形成方法を提供することを目的とする。 It is an object of the present invention to provide a cut line forming device and a cut line forming method that enable high-precision cut line formation without adopting a large-scale and complicated configuration.

本発明の一態様においては、長尺ウェブ状のキャリアフィルムと、粘着剤層を介してキャリアフィルム上に積層された長尺ウェブ状の光学フィルムとを含む長尺ウェブ状の光学フィルム積層体に、幅方向に延びる切込線を連続的に形成するための切込線形成装置を提供する。切込線形成装置は、切込線形成部と、搬送方向変更部と、切込線検出部とを備える。切込線形成部は、キャリアフィルムとは反対側の面から水平方向に搬送される光学フィルム積層体に切込線を形成する。搬送方向変更部は、切込線形成部より光学フィルム積層体の搬送方向下流側に配置され、切込線形成後の光学フィルム積層体の搬送方向を所定の角度で変更させる。切込線検出部は、搬送方向変更部より光学フィルム積層体の搬送方向下流側に配置され、光学フィルム積層体に形成された切込線を検出する。切込線形成部と搬送方向変更部との間には、光学フィルム積層体に接触する部材が配置されていないことが好ましい。ここで、切込線形成部においては水平方向に搬送される光学フィルム積層体に切込線が形成されるが、本明細書でいう水平方向に搬送とは、光学フィルム積層体の搬送方向が水平面に対して完全に平行（水平面に対して０°）であることに限定されるものではなく、実質的に水平に搬送されていればよく、具体的には、搬送方向が水平面に対して－１５°の傾きとなる場合から＋１５°の傾きとなる場合までを含むものとすることができる。 In one aspect of the present invention, a long web-shaped optical film laminate including a long web-shaped carrier film and a long web-shaped optical film laminated on the carrier film via an adhesive layer is formed. , Provided is a cut line forming apparatus for continuously forming a cut line extending in the width direction. The cut line forming device includes a cut line forming unit, a transport direction changing unit, and a cut line detecting unit. The cut line forming portion forms a cut line in the optical film laminate that is horizontally conveyed from the surface opposite to the carrier film. The transport direction changing portion is arranged on the downstream side in the transport direction of the optical film laminate from the cut line forming portion, and changes the transport direction of the optical film laminate after the cut line formation by a predetermined angle. The cut line detection unit is arranged on the downstream side of the optical film laminate in the transport direction from the transport direction changing portion, and detects the cut line formed in the optical film laminate. It is preferable that no member in contact with the optical film laminate is arranged between the cut line forming portion and the transport direction changing portion. Here, in the cut line forming portion, a cut line is formed in the optical film laminated body that is conveyed in the horizontal direction. However, in the horizontal direction referred to in the present specification, the conveying direction of the optical film laminated body is It is not limited to being completely parallel to the horizontal plane (0 ° with respect to the horizontal plane), and may be transported substantially horizontally, specifically, the transport direction is with respect to the horizontal plane. It can include the case where the inclination is -15 ° to the case where the inclination is + 15 °.

一実施形態においては、所定の角度は６０°以上１２０°以下であることが好ましい。また、一実施形態においては、切込線形成部と前記搬送方向変更部との間の距離が、１００ｍｍ以上８５０ｍｍ以下であることが好ましい。 In one embodiment, the predetermined angle is preferably 60 ° or more and 120 ° or less. Further, in one embodiment, it is preferable that the distance between the cut line forming portion and the transport direction changing portion is 100 mm or more and 850 mm or less.

本発明の別の態様においては、長尺ウェブ状のキャリアフィルムと、粘着剤層を介してキャリアフィルム上に積層された長尺ウェブ状の光学フィルムとを含む長尺ウェブ状の光学フィルム積層体に、幅方向に延びる切込線を連続的に形成するための切込線形成方法を提供する。切込線形成方法は、切込線形成ステップと、搬送方向変更ステップと、切込線検出ステップとを含む。切込線形成ステップは、キャリアフィルムとは反対側の面から光学フィルム積層体に切込線を形成する。搬送方向変更ステップは、切込線が形成される位置より光学フィルム積層体の搬送方向下流側で、切込線形成後の光学フィルム積層体の搬送方向を所定の角度で変更させる。切込線検出ステップは、搬送方向が変更する位置より光学フィルム積層体の搬送方向下流側で、光学フィルム積層体に形成された切込線を検出する。 In another aspect of the present invention, a long web-shaped optical film laminate including a long web-shaped carrier film and a long web-shaped optical film laminated on the carrier film via an adhesive layer. Provides a method for forming a cut line for continuously forming a cut line extending in the width direction. The cut line forming method includes a cut line forming step, a transport direction changing step, and a cut line detecting step. The cut line forming step forms a cut line in the optical film laminate from the surface opposite to the carrier film. The transport direction changing step changes the transport direction of the optical film laminate after the cut line is formed by a predetermined angle on the downstream side of the transfer direction of the optical film laminate from the position where the cut line is formed. The cut line detection step detects the cut line formed in the optical film laminate on the downstream side in the transport direction of the optical film laminate from the position where the transport direction changes.

本発明に係る切込線形成装置及び切込線形成方法においては、光学フィルム積層体の搬送方向が水平になっている状態で切込線が形成され、搬送方向が上向き又は下向きになっている状態で切込線の検出が行われるため、切込線検出が行われるときの光学フィルム積層体の撓みが、搬送方向が水平になっている状態で検出が行われるときより少なくなる。したがって、この切込線形成装置及び切込線形成方法によれば、隣接する切込線の間の長さ、すなわち形成される光学フィルムシートの長さと、予め設定された光学フィルムシートの長さとの誤差を、従来より小さくすることができ、高精度の切込線形成が可能になる。 In the cut line forming apparatus and the cut line forming method according to the present invention, the cut line is formed in a state where the transport direction of the optical film laminate is horizontal, and the transport direction is upward or downward. Since the cut line is detected in the state, the bending of the optical film laminate when the cut line is detected is smaller than that when the detection is performed when the transport direction is horizontal. Therefore, according to this cut line forming apparatus and cut line forming method, the length between adjacent cut lines, that is, the length of the formed optical film sheet and the preset length of the optical film sheet. The error can be made smaller than before, and high-precision cut line formation becomes possible.

本発明の一実施形態による切込線形成装置を含む、切込線形成のための機構を示す概略的な側面図である。It is a schematic side view which shows the mechanism for the cut line formation which includes the cut line forming apparatus by one Embodiment of this invention. 本発明の一実施形態による、切込線形成部と切込線検出部とを含む切込線形成装置の構成を示す模式的な側面図である。It is a schematic side view which shows the structure of the cut line forming apparatus which includes the cut line forming part and the cut line detecting part by one Embodiment of this invention. 本発明の一実施形態による切込線形成装置によって切込線を形成する工程を示すフロー図である。It is a flow diagram which shows the process of forming a cut line by the cut line forming apparatus by one Embodiment of this invention.

以下、図面を参照しながら本発明の実施形態を詳細に説明する。
本発明に係る切込線形成装置及び方法は、長尺ウェブ状のキャリアフィルム上に連続的に支持された複数の光学フィルムシートを画定するための切込線を、長尺ウェブ状の光学フィルム積層体に連続的に形成するのに用いることができるものである。本発明に係る切込線形成装置及び切込線形成方法においては、光学フィルム積層体の搬送方向が水平の状態で切込線が形成され、搬送方向が上向き又は下向きの状態で切込線の検出が行われるため、切込線検出が行われるときの光学フィルム積層体の撓みは、搬送方向が水平の状態で検出が行われるときより少なくなる。したがって、この切込線形成装置及び切込線形成方法を用いれば、隣接する切込線の間の長さ、すなわち形成される光学フィルムシートの長さと、予め設定された光学フィルムシートの規定の長さとの誤差を、従来より小さくすることができる。隣接する切込線の間に形成される光学フィルムシートは、長尺ウェブ状のキャリアフィルム上に支持された状態で、パネル部材との貼合位置まで送られ、長尺ウェブ状のキャリアフィルムから粘着剤層とともに剥離された後、高精度でパネル部材に貼り合わせることができる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the cut line forming apparatus and method according to the present invention, a cut line for defining a plurality of optical film sheets continuously supported on a long web-shaped carrier film is formed on a long web-shaped optical film. It can be used to continuously form a laminate. In the cut line forming apparatus and the cut line forming method according to the present invention, the cut line is formed when the transport direction of the optical film laminate is horizontal, and the cut line is formed when the transport direction is upward or downward. Since the detection is performed, the deflection of the optical film laminate when the cut line detection is performed is smaller than that when the detection is performed when the transport direction is horizontal. Therefore, if this cut line forming device and cut line forming method are used, the length between adjacent cut lines, that is, the length of the optical film sheet to be formed, and the predetermined optical film sheet are defined. The error with the length can be made smaller than before. The optical film sheet formed between the adjacent cut lines is fed to the bonding position with the panel member while being supported on the long web-shaped carrier film, and is sent from the long web-shaped carrier film. After being peeled off together with the pressure-sensitive adhesive layer, it can be attached to the panel member with high accuracy.

ＲＴＰシステムにおいて本発明に係る切込線形成装置及び切込線形成方法を用いる場合には、例えば特許文献１に開示されるように、切込線形成装置の前工程に、長尺ウェブ状の光学フィルム積層体のロールを装着する支架装置、ロールから光学フィルム積層体を連続的に繰り出す繰出装置、光学フィルム積層体上に予め記録されたコード化済み欠点情報を読み取る読取装置、フィルムの搬送速度を調整する速度調整装置などといった装置を設けることができる。これらの装置を通過した光学フィルム積層体は、切込線形成装置に送り込まれる。 When the cut line forming apparatus and the cut line forming method according to the present invention are used in the RTP system, for example, as disclosed in Patent Document 1, a long web-like shape is used in the previous step of the cut line forming apparatus. A support device for mounting a roll of the optical film laminate, a feeding device for continuously feeding the optical film laminate from the roll, a reading device for reading pre-coded defect information recorded on the optical film laminate, and a film transport speed. It is possible to provide a device such as a speed adjusting device for adjusting the speed. The optical film laminate that has passed through these devices is sent to the cutting line forming device.

次に、光学フィルム積層体は、切込線形成装置から後工程に送り出される。切込線形成装置の後工程には、フィルムの搬送速度を調整する速度調整装置、欠点が存在する光学フィルムのシートを長尺ウェブ状のキャリアフィルムから排除する排除装置、欠点の存在しない光学フィルムシートを長尺ウェブ状のキャリアフィルムから剥離してパネル部材に貼合せる貼合装置、長尺ウェブ状のキャリアフィルムを巻き取る巻取駆動装置などといった装置を設けることができる。 Next, the optical film laminate is sent out from the cutting line forming apparatus to a subsequent process. In the post-process of the cut line forming device, a speed adjusting device for adjusting the transport speed of the film, an exclusion device for removing the sheet of the optical film having defects from the long web-shaped carrier film, and an optical film without defects. A device such as a bonding device for peeling the sheet from the long web-shaped carrier film and bonding it to the panel member, a winding drive device for winding the long web-shaped carrier film, and the like can be provided.

［切込線形成装置の構成］
図１は、本発明の一実施形態による切込線形成装置１を含む、切込線形成のための概略的な構成を示す側面図である。図２は、本発明の一実施形態による切込線形成装置１の概略的な構成を示す側面図である。光学フィルム積層体ＰＬは、図１の矢印Ｄ１によって示される方向に送られる。この方向Ｄ１を光学フィルム積層体ＰＬの「搬送方向」という。 [Structure of cut line forming device]
FIG. 1 is a side view showing a schematic configuration for cutting line forming, including the cutting line forming device 1 according to the embodiment of the present invention. FIG. 2 is a side view showing a schematic configuration of a cut line forming apparatus 1 according to an embodiment of the present invention. The optical film laminate PL is fed in the direction indicated by the arrow D1 in FIG. This direction D1 is referred to as the "transport direction" of the optical film laminate PL.

切込線形成装置１は、切込線を形成する切込線形成部１０と、切込線形成部１０において切込線が形成された光学フィルム積層体ＰＬの搬送方向を所定の角度で変更させる支持ローラ（搬送方向変更部）２０と、搬送方向が変更された光学フィルム積層体ＰＬの切込線の位置を検出する切込線検出部３０とを備える。切込線形成部１０及び切込線検出部３０の動作は、汎用コンピュータなどで構成される制御手段（図示せず）によって制御される。 The cut line forming apparatus 1 changes the transport direction of the cut line forming portion 10 for forming the cut line and the optical film laminate PL on which the cut line is formed in the cut line forming portion 10 at a predetermined angle. It is provided with a support roller (conveying direction changing unit) 20 for causing the transfer, and a cutting line detecting unit 30 for detecting the position of the cutting line of the optical film laminate PL whose transport direction has been changed. The operation of the cut line forming unit 10 and the cut line detecting unit 30 is controlled by a control means (not shown) configured by a general-purpose computer or the like.

切込線形成装置１において切込線が形成される光学フィルム積層体ＰＬは、長尺ウェブ状光学フィルムＯＰと、粘着剤層Ａを介して該長尺ウェブ状光学フィルムＯＰと接合された長尺ウェブ状キャリアフィルムＣとを含む積層体とすることができる。長尺ウェブ状光学フィルムＯＰは、単層フィルムであってもよく、２種類以上の光学フィルム（例えば偏光子及び位相差フィルム）を接合した多層フィルムであってもよい。 The optical film laminate PL on which the cut line is formed in the cut line forming apparatus 1 is a length joined to the long web-shaped optical film OP and the long web-shaped optical film OP via the pressure-sensitive adhesive layer A. It can be a laminated body containing the scale web-shaped carrier film C. The long web-shaped optical film OP may be a single-layer film or a multilayer film in which two or more types of optical films (for example, a splitter and a retardation film) are bonded.

図１に示されるように、光学フィルム積層体ＰＬは、パネル部材の長辺及び短辺の一方の長さに対応する幅を有するロールＲとして準備される。ロールＲから繰り出された光学フィルム積層体ＰＬは、例えば光学フィルム積層体ＰＬを繰り出すフィードローラなどのフィルム駆動手段Ｄ、フィルム搬送の速度を調整するダンサーロールなどの速度調整手段Ｓなどを経て、切込線形成装置１に送り込まれる。切込線形成装置１に送り込まれた光学フィルム積層体ＰＬには、切込線が形成される。 As shown in FIG. 1, the optical film laminate PL is prepared as a roll R having a width corresponding to the length of one of the long side and the short side of the panel member. The optical film laminate PL unwound from the roll R is cut through, for example, a film driving means D such as a feed roller for feeding the optical film laminate PL, a speed adjusting means S such as a dancer roll for adjusting the speed of film transport, and the like. It is sent to the drop line forming device 1. A cut line is formed in the optical film laminate PL sent to the cut line forming device 1.

切込線は、キャリアフィルムＣとは反対側の面から少なくとも粘着剤層Ａの面（すなわち、キャリアフィルムＣと粘着剤層Ａとの境界面）に達する深さまで、光学フィルム積層体ＰＬの幅方向に延びるように形成される。切込線が形成されると、光学フィルム積層体ＰＬは、搬送方向Ｄ１の下流側に予め定められた距離だけ送られ、次の切込線が形成される。この予め定められた搬送距離は、光学フィルム積層体ＰＬのシートＰＳが貼り合わされるパネル部材Ｗの長辺及び短辺の他方の長さに対応する。本明細書においては、切込線形成部１０において形成され、台座１６上に位置する切込線を切込線ＣＬ１とし、切込線ＣＬ１の搬送方向下流側に位置する切込線を１つ先行する切込線ＣＬ２とする。 The cut line is the width of the optical film laminate PL from the surface opposite to the carrier film C to at least the surface of the pressure-sensitive adhesive layer A (that is, the interface between the carrier film C and the pressure-sensitive adhesive layer A). It is formed to extend in the direction. When the cut line is formed, the optical film laminate PL is sent to the downstream side of the transport direction D1 by a predetermined distance, and the next cut line is formed. This predetermined transport distance corresponds to the other length of the long side and the short side of the panel member W to which the sheet PS of the optical film laminate PL is bonded. In the present specification, the cut line formed in the cut line forming portion 10 and located on the pedestal 16 is referred to as the cut line CL1, and one cut line located on the downstream side in the transport direction of the cut line CL1. The preceding cut line CL2 is used.

（切込線形成部）
切込線形成部１０は、光学フィルム積層体ＰＬの主面に水平な回転軸を有する円形刃物１１と、円形刃物１１を回転させるための軸及びモータを含む駆動部１２と、光学フィルム積層体ＰＬを挟んで円形刃物１１とは反対側に配置された台座１３と、切込線形成位置において光学フィルム積層体ＰＬを押さえて光学フィルム積層体ＰＬの撓みや振動を抑制する押さえ部材１４とを有する。切込線形成部１０は、さらに、回転刃物１１及び駆動部１２を図２の上下方向に（光学フィルム積層体ＰＬの主面に対して直交する方向に）移動させるためのモータ及びガイドを含む第１の移動機構１５と、回転刃物１１、駆動部１２及び第１の移動機構１５を図２の紙面に垂直な方向に（光学フィルム積層体の幅方向に）移動させるためのモータ及びガイドを含む第２の移動機構１６とを備える。 (Cut line forming part)
The cut line forming portion 10 includes a circular blade 11 having a rotation axis horizontal to the main surface of the optical film laminate PL, a drive unit 12 including a shaft and a motor for rotating the circular blade 11, and an optical film laminate. A pedestal 13 arranged on the opposite side of the circular blade 11 with the PL sandwiched between the pedestal 13 and a pressing member 14 that presses the optical film laminate PL at the cutting line forming position to suppress bending and vibration of the optical film laminate PL. Have. The cut line forming portion 10 further includes a motor and a guide for moving the rotary blade 11 and the driving portion 12 in the vertical direction (direction orthogonal to the main surface of the optical film laminate PL) in FIG. A motor and a guide for moving the first moving mechanism 15, the rotary blade 11, the driving unit 12, and the first moving mechanism 15 in the direction perpendicular to the paper surface of FIG. 2 (in the width direction of the optical film laminate). It includes a second moving mechanism 16 including.

円形刃物１１、駆動部１２、第１の移動機構１５、及び第２の移動機構１６は、支持部１７によって支持される。支持部１７は、その側面において円形刃物１１、駆動部１２、第１の移動機構１５、及び第２の移動機構１６を支持するようになっている。一実施形態においては、切込線形成部１０は、支持部１７を移動させることによって円形刃物１１の位置を光学フィルム積層体ＰＬの長さ方向（図２の左右方向）に移動させるための第３の移動機構（図示せず）をさらに備える。第３の移動機構を動作させることによって、光学フィルム積層体ＰＬに切込線ＣＬ１、ＣＬ２・・・を形成する位置を調整することができる。別の実施形態においては、例えば第１の移動機構１５、第２の移動機構１６及び支持部１７を移動させず、円形刃物１１及び駆動部１２のみを移動させて、光学フィルム積層体ＰＬに切込線ＣＬ１、ＣＬ２・・・を形成する位置を調整することができる。さらに別の実施形態においては、例えば円形刃物１１及び駆動部１２と第１の移動機構１５及び第２の移動機構１６とを移動させて、光学フィルム積層体ＰＬに切込線ＣＬ１、ＣＬ２・・・を形成する位置を調整することもできる。 The circular blade 11, the driving unit 12, the first moving mechanism 15, and the second moving mechanism 16 are supported by the support portion 17. The support portion 17 supports the circular blade 11, the drive portion 12, the first moving mechanism 15, and the second moving mechanism 16 on its side surface. In one embodiment, the cut line forming portion 10 moves the support portion 17 to move the position of the circular cutting tool 11 in the length direction (left-right direction in FIG. 2) of the optical film laminate PL. It further comprises 3 moving mechanisms (not shown). By operating the third moving mechanism, the positions where the cut lines CL1, CL2, ... Are formed on the optical film laminate PL can be adjusted. In another embodiment, for example, the first moving mechanism 15, the second moving mechanism 16, and the support portion 17 are not moved, but only the circular cutting tool 11 and the driving portion 12 are moved to cut into the optical film laminate PL. The positions of forming the lines CL1, CL2, ... Can be adjusted. In yet another embodiment, for example, the circular blade 11, the drive unit 12, the first moving mechanism 15, and the second moving mechanism 16 are moved, and the cut lines CL1, CL2, ...・ It is also possible to adjust the position to form.

切込線形成部１０は、図示されない制御手段による制御によって、光学フィルム積層体ＰＬに切込線ＣＬ１、ＣＬ２・・・を形成するように動作する。具体的には、制御手段からの制御信号によって、第１の移動機構１５が動作して円形刃物１１が所定の位置まで降下し、駆動部１２が動作して円形刃物１１を回転させ、第２の駆動機構１６が動作して円形刃物１１を光学フィルム積層体ＰＬの幅方向に移動させる。 The cut line forming unit 10 operates so as to form the cut lines CL1, CL2, ... On the optical film laminate PL by control by a control means (not shown). Specifically, in response to a control signal from the control means, the first moving mechanism 15 operates to lower the circular blade 11 to a predetermined position, and the drive unit 12 operates to rotate the circular blade 11 to rotate the second. The drive mechanism 16 of the above operates to move the circular blade 11 in the width direction of the optical film laminate PL.

（搬送方向変更部）
切込線形成部１０に対して、光学フィルム積層体ＰＬの搬送方向の下流側には、切込線ＣＬ１、ＣＬ２・・・が形成された光学フィルム積層体ＰＬの搬送方向を変更させるための搬送方向変更部２０が配置される。搬送方向変更部２０は、光学フィルム積層体ＰＬが搬送される方向を、切込線形成部１０における搬送方向（図２に示される方向ｄ１）から、上方向又は下方向（図２の実施形態においては上方向ｄ２）に、水平面に平行な方向（水平面に対して０°の方向）に対して所定の角度θで変更させることができる。本実施形態においては、搬送方向変更部２０は、少なくとも光学フィルム積層体ＰＬの幅より長く、光学フィルム積層体ＰＬの２つの主面のいずれかに接触するように配置される支持ローラ２２を有する。 (Transport direction change part)
To change the transport direction of the optical film laminate PL on which the cut lines CL1, CL2, ... Are formed on the downstream side of the cut line forming portion 10 in the transport direction of the optical film laminate PL. The transport direction changing unit 20 is arranged. The transport direction changing section 20 sets the transport direction of the optical film laminate PL from the transport direction in the cut line forming section 10 (direction d1 shown in FIG. 2) to an upward direction or a downward direction (the embodiment of FIG. 2). In the above direction d2), the direction can be changed by a predetermined angle θ with respect to the direction parallel to the horizontal plane (direction of 0 ° with respect to the horizontal plane). In the present embodiment, the transport direction changing portion 20 has a support roller 22 that is at least longer than the width of the optical film laminate PL and is arranged so as to be in contact with one of the two main surfaces of the optical film laminate PL. ..

切込線形成部１０と搬送方向変更部２０との間の距離、より具体的には、搬送される光学フィルム積層体ＰＬが切込線形成部１０において最後に接触した位置（台座１３の最下流部）と、搬送方向変更部２において最初に接触する位置（支持ローラ２２との接触部）との間の距離Ｌは、光学フィルム積層体ＰＬの撓みをできるだけ少なくするために、８５０ｍｍ以下であることが好ましく、６５０ｍｍ以下であることがより好ましく、３５０ｍｍ以下であることがさらに好ましい。距離が８５０ｍｍより大きい場合には、光学フィルム積層体が自重で大きく撓む可能性がある。搬送方向変更部２０は、できるだけ切込線形成部１０に近いことが好ましいが、切込線形成部１０と搬送方向変更部２０との間には種々の装置が配置される場合がある。したがって、種々の装置を配置するスペースを確保するために、切込線形成部１０と搬送方向変更部２０との間の距離Ｌは、１００ｍｍ以上であることが好ましく、１５０ｍｍ以上であることがより好ましい。 The distance between the cut line forming portion 10 and the transport direction changing portion 20, more specifically, the position where the optical film laminated body PL to be conveyed is last contacted at the cut line forming portion 10 (the most of the pedestal 13). The distance L between the downstream portion) and the first contact position (contact portion with the support roller 22) in the transport direction changing portion 2 is 850 mm or less in order to minimize the deflection of the optical film laminate PL. It is preferably 650 mm or less, more preferably 350 mm or less, and even more preferably 350 mm or less. If the distance is larger than 850 mm, the optical film laminate may bend significantly due to its own weight. The transport direction changing unit 20 is preferably as close as possible to the cut line forming unit 10, but various devices may be arranged between the cut line forming unit 10 and the transport direction changing unit 20. Therefore, in order to secure a space for arranging various devices, the distance L between the cut line forming portion 10 and the transport direction changing portion 20 is preferably 100 mm or more, and more preferably 150 mm or more. preferable.

搬送方向変更部２０によって変更された後の光学フィルム積層体ＰＬの搬送方向ｄ２は、変更前の搬送方向ｄ１に対して上方向でも下方向でもよい。水平面に平行な方向と搬送方向ｄ２との間の所定の角度θは、好ましくは６０°以上１２０°以下であり、９０°に近いほど好ましい。所定の角度θが６０°以上１２０°以下であれば、搬送方向が変更された後の光学フィルム積層体ＰＬに撓みが生じないか、又は、生じたとしても切込線検出部３０において切込線の位置を検出するときの精度に影響を及ぼさない程度の撓みにとどまる。 The transport direction d2 of the optical film laminate PL after being changed by the transport direction changing unit 20 may be upward or downward with respect to the transport direction d1 before the change. The predetermined angle θ between the direction parallel to the horizontal plane and the transport direction d2 is preferably 60 ° or more and 120 ° or less, and the closer to 90 ° is preferable. If the predetermined angle θ is 60 ° or more and 120 ° or less, the optical film laminate PL after the transfer direction is changed does not bend, or even if it does, the cut line detection unit 30 cuts. The deflection is limited to the extent that it does not affect the accuracy when detecting the position of the line.

光学フィルム積層体ＰＬの撓みを防止する観点から、切込線形成部２０と搬送方向変更部３０との間に、例えば光学フィルム積層体ＰＬを下主面から支持するローラなどの支持部材を配置することも考えられるが、このような支持部材は配置されないことが好ましい。切込線形成部１０と搬送方向変更部２０との間に支持部材を配置しても、これらの間における光学フィルム積層体ＰＬの撓み解消に対してより効果的な寄与を提供するものではないだけでなく、支持部材による光学フィルム積層体ＰＬの支持高さの調整精度が悪いと、支持部材が光学フィルム積層体ＰＬを押し上げることによって直線精度が低下するおそれがある。 From the viewpoint of preventing the optical film laminate PL from bending, a support member such as a roller that supports the optical film laminate PL from the lower main surface is arranged between the cut line forming portion 20 and the transport direction changing portion 30. However, it is preferable that such a support member is not arranged. Even if the support member is arranged between the cut line forming portion 10 and the transport direction changing portion 20, it does not provide a more effective contribution to the elimination of the bending of the optical film laminate PL between them. Not only that, if the adjustment accuracy of the support height of the optical film laminate PL by the support member is poor, the linear accuracy may decrease due to the support member pushing up the optical film laminate PL.

（切込線検出部）
切込線形成部１０によって形成される切込線ＣＬ１の搬送方向位置は、補正情報を用いて補正される。補正情報は、切込線検出部３０によって検出される１つ先行する切込線ＣＬ２が形成されている位置と、あらかじめ定められた切込線形成基準位置とのずれ量に基づいて、生成される。切込線検出部３０は、搬送方向変更部２０の下流側に配置されるため、光学フィルム積層体ＰＬに撓みが生じない状態で切込線の位置を検出することができる。 (Cut line detector)
The transport direction position of the cut line CL1 formed by the cut line forming portion 10 is corrected by using the correction information. The correction information is generated based on the amount of deviation between the position where the one preceding cut line CL2 detected by the cut line detection unit 30 is formed and the predetermined cut line formation reference position. To. Since the cut line detecting unit 30 is arranged on the downstream side of the transport direction changing unit 20, the position of the cut line can be detected in a state where the optical film laminated body PL does not bend.

本実施形態においては、切込線検出部３０は、図２に示されるように、カメラと照明とを用いて切込線ＣＬ２が形成された部分における所定の範囲の画像を撮影することができる撮像手段３２を用いることが好ましいが、これに限定されるものではなく、例えばレーザ式、超音波式などのエッジセンサを用いることもできる。撮像手段３２によって撮影される所定範囲は、すでに形成された切込線ＣＬ２の位置に基づいて次の切込線ＣＬ１の形成位置を補正するための補正情報を生成することができる範囲であれば、限定されるものではない。所定範囲は、切込線ＣＬ２のみを含む範囲や、切込線ＣＬ２と光学フィルム積層体ＰＬの一方の側縁部とを含む範囲など、生成されるべき補正情報に応じて適宜設定することができる。 In the present embodiment, as shown in FIG. 2, the cut line detection unit 30 can take an image of a predetermined range in the portion where the cut line CL2 is formed by using the camera and the illumination. It is preferable to use the image pickup means 32, but the present invention is not limited to this, and for example, an edge sensor such as a laser type or an ultrasonic type can also be used. The predetermined range imaged by the image pickup means 32 is a range as long as it can generate correction information for correcting the formation position of the next cut line CL1 based on the position of the cut line CL2 already formed. , Not limited. The predetermined range may be appropriately set according to the correction information to be generated, such as a range including only the cut line CL2 and a range including the cut line CL2 and one side edge portion of the optical film laminate PL. can.

［切込線形成方法］
次に、本発明の一実施形態による切込線形成装置１を用いた切込線形成方法を説明する。図３は、切込線形成装置１によって切込線を形成する工程を示す概略的なフロー図である。 [Cut line formation method]
Next, a cut line forming method using the cut line forming device 1 according to the embodiment of the present invention will be described. FIG. 3 is a schematic flow chart showing a process of forming a cut line by the cut line forming device 1.

切込線形成装置１によって切込線を形成する工程は、光学フィルム積層体ＰＬのロールＲから光学フィルム積層体ＰＬが繰り出されることによって開始する（ｓ１）。繰り出された光学フィルム積層体ＰＬは、図１に示されるＤ１方向に送られ、例えば速度調整手段Ｓなどを経て切込線形成装置１まで送られる（ｓ２）。 The step of forming the cut line by the cut line forming apparatus 1 is started by feeding out the optical film laminated body PL from the roll R of the optical film laminated body PL (s1). The unwound optical film laminate PL is fed in the D1 direction shown in FIG. 1, and is fed to the cut line forming apparatus 1 via, for example, the speed adjusting means S (s2).

切込線形成装置１においては、送り込まれた光学フィルム積層体ＰＬに、キャリアフィルムＣとは反対側の面から、少なくとも粘着剤層Ａの面まで達する深さの切込線ＣＬ２が形成される（ｓ３）。切込線ＣＬ２が形成された光学フィルム積層体ＰＬは、さらに図２のｄ１方向に送られ、下流側に位置する支持ローラ２２によって搬送方向が水平面に平行な方向から所定の角度θで変更されて、この実施形態では図２のｄ２方向に送られる（ｓ４）。切込線ＣＬ２が形成された部分は、支持ローラ２２の下流側に配置された切込線検出部３０に到達する（ｓ５）。 In the cut line forming apparatus 1, the cut line CL2 having a depth reaching at least the surface of the pressure-sensitive adhesive layer A from the surface opposite to the carrier film C is formed on the fed optical film laminate PL. (S3). The optical film laminate PL on which the cut line CL2 is formed is further fed in the d1 direction of FIG. 2, and the transport direction is changed by a support roller 22 located on the downstream side from a direction parallel to the horizontal plane at a predetermined angle θ. In this embodiment, it is sent in the d2 direction of FIG. 2 (s4). The portion where the cut line CL2 is formed reaches the cut line detection unit 30 arranged on the downstream side of the support roller 22 (s5).

なお、切込線形成部１０で切込線ＣＬ２が形成された後の光学フィルム積層体ＰＬは、光学フィルム積層体ＰＬが切込線形成部１０において最後に接触した位置（台座１３の最下流部）と、支持ローラ２２に最初に接触する位置との間（この間の距離Ｌは１００ｍｍ以上８５０ｍｍ以下であることが好ましい）においては、他の部材に接触することなく搬送されることが好ましい。また、支持ローラ２２によって搬送方向が変更された後の光学フィルム積層体ＰＬは、その搬送方向ｄ２が、水平面に平行な方向に対して９０°に近い角度で搬送されることが好ましい。ただし、角度θは９０°に限定されるものではなく、装置の構成などの必要性に応じて、搬送方向変更後の光学フィルム積層体ＰＬを、水平面に平行な方向に対して６０°以上１２０°以下の角度で搬送することができる。 The optical film laminated body PL after the cut line CL2 is formed by the cut line forming portion 10 is the position where the optical film laminated body PL finally contacts the cut line forming portion 10 (the most downstream of the pedestal 13). Part) and the position where the support roller 22 first contacts (the distance L between them is preferably 100 mm or more and 850 mm or less), it is preferable that the film is conveyed without contacting other members. Further, it is preferable that the optical film laminate PL after the transfer direction is changed by the support roller 22 is conveyed at an angle in which the transfer direction d2 is close to 90 ° with respect to the direction parallel to the horizontal plane. However, the angle θ is not limited to 90 °, and the optical film laminate PL after changing the transport direction is 60 ° or more and 120 ° or more with respect to the direction parallel to the horizontal plane, depending on the needs such as the configuration of the apparatus. It can be transported at an angle of ° or less.

次に、切込線ＣＬ２が、切込線検出部３０の撮像手段３２によって検出される（ｓ６）。切込線ＣＬ２は、例えば、取得された画像全体の明るさをサーチし、コントラスト差の大きい場所を線として認識することによって、検出することができる。検出された切込線ＣＬ２が形成されている位置と、あらかじめ定められた切込線形成基準位置とのずれを検査し（ｓ７）、ずれがあれば、計算されたずれ量に基づいて生成された補正情報にしたがって、切込線形成部１０の支持部１７を光学フィルム積層体ＰＬの長さ方向に移動させる（ｓ８）。支持部１７を移動させることによって円形刃物１１の位置（すなわち、切込線ＣＬ１の形成位置）を調整した後、切込線ＣＬ１が形成される（ｓ９）。切込線ＣＬ２の位置と基準位置との間にずれがない場合には、ｓ８の工程を行うことなく切込線ＣＬ１を形成することができる（ｓ９）。なお、本実施形態においては、支持部１７を移動させることによって切込線ＣＬ１の形成位置を調整しているが、これに限定されるものではなく、例えば、円形刃物１１を移動させたり、フィードローラなどのフィルム駆動手段で光学フィルム積層体の繰り出し量を変化させたりすることによって、調整することもできる。 Next, the cut line CL2 is detected by the image pickup means 32 of the cut line detection unit 30 (s6). The cut line CL2 can be detected, for example, by searching for the brightness of the entire acquired image and recognizing a place having a large contrast difference as a line. The deviation between the position where the detected cut line CL2 is formed and the predetermined cut line formation reference position is inspected (s7), and if there is a deviation, it is generated based on the calculated deviation amount. The support portion 17 of the cut line forming portion 10 is moved in the length direction of the optical film laminate PL according to the correction information (s8). After adjusting the position of the circular cutting tool 11 (that is, the position where the cut line CL1 is formed) by moving the support portion 17, the cut line CL1 is formed (s9). If there is no deviation between the position of the cut line CL2 and the reference position, the cut line CL1 can be formed without performing the step of s8 (s9). In the present embodiment, the formation position of the cut line CL1 is adjusted by moving the support portion 17, but the present invention is not limited to this, and for example, the circular cutting tool 11 may be moved or fed. It can also be adjusted by changing the feeding amount of the optical film laminate with a film driving means such as a roller.

以上の工程が終了すると、光学フィルム積層体ＰＬは、予め定められた距離だけ再び送られ（ｓ１０）、ｓ５からｓ９までの工程が繰り返される。このようにして光学フィルム積層体ＰＬ上に連続的に形成された光学フィルムシートＯＰ（隣接する２つの切込線の間に画定されたシート）は、パネル部材との貼合工程に送られ、パネル部材と貼り合わせることができる。 When the above steps are completed, the optical film laminate PL is sent again by a predetermined distance (s10), and the steps from s5 to s9 are repeated. The optical film sheet OP (sheet defined between two adjacent cut lines) continuously formed on the optical film laminate PL in this way is sent to the bonding process with the panel member. It can be attached to a panel member.

１ 切込線形成装置
１０ 切込線形成部
１１ 円形刃物
１２ 駆動部
１３ 台座
１４ 押さえ部材
１５ 第１の移動機構
１６ 第２の移動機構
１７ 支持部
２０ 搬送方向変更部
２２ 支持ローラ
３０ 切込線検出部
３２ 撮像手段
ＰＬ 光学フィルム積層体
ＣＬ１、ＣＬ２ 切込線

1 Cut line forming device 10 Cut line forming part 11 Circular blade 12 Drive part 13 Pedestal 14 Holding member 15 First moving mechanism 16 Second moving mechanism 17 Support part 20 Transport direction changing part 22 Support roller 30 Cut line Detection unit 32 Imaging means PL optical film laminate CL1, CL2 Notch line

Claims (8)

長尺ウェブ状のキャリアフィルムと、粘着剤層を介してキャリアフィルム上に積層された長尺ウェブ状の光学フィルムとを含む長尺ウェブ状の光学フィルム積層体に、幅方向に延びる切込線を連続的に形成するための切込線形成装置であって、
キャリアフィルムとは反対側の面から水平方向に搬送される光学フィルム積層体に切込線を形成する、切込線形成部と、
前記切込線形成部より前記光学フィルム積層体の搬送方向下流側に配置され、切込線形成後の前記光学フィルム積層体の搬送方向を所定の角度で変更させる、搬送方向変更部と、
前記搬送方向変更部より前記光学フィルム積層体の搬送方向下流側に配置され、前記光学フィルム積層体に形成された切込線を検出する、切込線検出部と
を備えることを特徴とする切込線形成装置。 A cut line extending in the width direction in a long web-shaped optical film laminate including a long web-shaped carrier film and a long web-shaped optical film laminated on the carrier film via an adhesive layer. It is a cut line forming device for continuously forming
A cut line forming portion that forms a cut line in an optical film laminate that is horizontally conveyed from a surface opposite to the carrier film, and a cut line forming portion.
A transport direction changing portion, which is arranged on the downstream side of the optical film laminate in the transport direction from the cut line forming portion and changes the transport direction of the optical film laminate after the cut line formation by a predetermined angle.
The cutting line is arranged on the downstream side in the transport direction of the optical film laminate from the transport direction changing section, and is provided with a cut line detecting section for detecting a cut line formed in the optical film laminate. Insert line forming device. 前記切込線形成部と前記搬送方向変更部との間には、前記光学フィルム積層体に接触する部材が配置されていない
ことを特徴とする、請求項１に記載の切込線形成装置。 The cut line forming apparatus according to claim 1, wherein a member in contact with the optical film laminate is not arranged between the cut line forming portion and the transport direction changing portion. 前記所定の角度は６０°以上１２０°以下であることを特徴とする、請求項１又は請求項２に記載の切込線形成装置。 The cut line forming apparatus according to claim 1 or 2, wherein the predetermined angle is 60 ° or more and 120 ° or less. 前記切込線形成部と前記搬送方向変更部との間の距離が、１００ｍｍ以上８５０ｍｍ以下であることを特徴とする、請求項１から請求項３までのいずれか１項に記載の切込線形成装置。 The cut line according to any one of claims 1 to 3, wherein the distance between the cut line forming portion and the transport direction changing portion is 100 mm or more and 850 mm or less. Forming device. 長尺ウェブ状のキャリアフィルムと、粘着剤層を介してキャリアフィルム上に積層された長尺ウェブ状の光学フィルムとを含む長尺ウェブ状の光学フィルム積層体に、幅方向に延びる切込線を連続的に形成するための切込線形成方法であって、
キャリアフィルムとは反対側の面から水平方向に搬送される光学フィルム積層体に切込線を形成する、切込線形成ステップと、
切込線が形成される位置より前記光学フィルム積層体の搬送方向下流側で、切込線形成後の前記光学フィルム積層体の搬送方向を所定の角度で変更させる、搬送方向変更ステップと、
搬送方向が変更する位置より前記光学フィルム積層体の搬送方向下流側で、前記光学フィルム積層体に形成された切込線を検出する、切込線検出ステップと
を含むことを特徴とする切込線形成方法。 A cut line extending in the width direction in a long web-shaped optical film laminate including a long web-shaped carrier film and a long web-shaped optical film laminated on the carrier film via an adhesive layer. It is a cutting line forming method for continuously forming
A cut line forming step that forms a cut line in an optical film laminate that is horizontally conveyed from a surface opposite to the carrier film.
A transport direction changing step for changing the transport direction of the optical film laminate after the cut line is formed by a predetermined angle on the downstream side in the transport direction of the optical film laminate from the position where the cut line is formed.
A cut line detection step for detecting a cut line formed in the optical film laminate on the downstream side in the transport direction of the optical film laminate from a position where the transport direction is changed is included. Line formation method. 前記切込線形成ステップを終えた後の前記光学フィルム積層体は、いずれの部材にも接触することなく前記搬送方向変更部まで搬送される
ことを特徴とする、請求項５に記載の切込線形成方法。 After completing the cut line forming step, the optical film laminate is transported to the transport direction changing portion without contacting any member.
The method for forming a cut line according to claim 5, wherein the method is characterized by the above. 前記所定の角度は６０°以上１２０°以下であることを特徴とする、請求項５又は請求項６に記載の切込線形成方法。 The cut line forming method according to claim 5 or 6, wherein the predetermined angle is 60 ° or more and 120 ° or less. 前記搬送方向変更ステップにおける搬送方向の変更は、切込線形成ステップ後に前記光学フィルム積層体が１００ｍｍ以上８５０ｍｍ以下搬送された位置で行われることを特徴とする、請求項５から請求項７までのいずれか１項に記載の切込線形成方法。

A fifth to seventh aspect of the present invention, wherein the change of the transfer direction in the transfer direction change step is performed at a position where the optical film laminate is conveyed at a position of 100 mm or more and 850 mm or less after the cut line forming step. The method for forming a cut line according to any one of the following items.
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