JP5830233B2 - Sheet bonded body manufacturing method and sheet bonded body manufacturing apparatus - Google Patents

Sheet bonded body manufacturing method and sheet bonded body manufacturing apparatus Download PDF

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Publication number
JP5830233B2
JP5830233B2 JP2010209801A JP2010209801A JP5830233B2 JP 5830233 B2 JP5830233 B2 JP 5830233B2 JP 2010209801 A JP2010209801 A JP 2010209801A JP 2010209801 A JP2010209801 A JP 2010209801A JP 5830233 B2 JP5830233 B2 JP 5830233B2
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Prior art keywords
resin sheet
sheet member
film
tip
old
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Expired - Fee Related
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JP2012062187A (en
Inventor
直之 松尾
直之 松尾
康雄 山口
康雄 山口
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Nitto Denko Corp
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Nitto Denko Corp
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Priority to JP2010209801A priority Critical patent/JP5830233B2/en
Priority to TW100125819A priority patent/TWI564234B/en
Priority to CN201110272941.7A priority patent/CN102431168B/en
Priority to KR1020110093160A priority patent/KR20120030016A/en
Publication of JP2012062187A publication Critical patent/JP2012062187A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/855—Belt splicing machines
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7891—Means for handling of moving sheets or webs of discontinuously moving sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms

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  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Polarising Elements (AREA)
  • Replacement Of Web Rolls (AREA)

Description

本発明は、２枚以上の樹脂シート部材を、レーザー光を照射することによって接合してシート接合体を作製するシート接合体の製造方法及びシート接合体の製造装置に関する。   The present invention relates to a sheet joined body manufacturing method and a sheet joined body manufacturing apparatus in which two or more resin sheet members are joined by irradiating a laser beam to produce a sheet joined body.

従来、液晶表示装置などの画像表示装置において、偏光フィルムなどを含む光学フィルムが利用されている。
この種の偏光フィルムの製造方法としては、原反となる帯状のポリビニルアルコール系樹脂（ＰＶＡ）フィルム等の樹脂シート部材がロール状に巻回されてなる原反ロールから原反フィルム（樹脂シート部材）を送り出して該原反フィルムの移動経路を規制し、原反フィルムをガイドする複数本のローラと各種の薬液浴とを備えた装置に通して延伸させる方法が採用されており、例えば、原反フィルムをその長手方向に移動させて膨潤浴や染色浴に連続して浸漬させた後に前後２箇所において前記ローラで原反フィルムをニップして、その間において張力を加えて前記延伸を実施させる方法が採用されたりしている。 Conventionally, an optical film including a polarizing film or the like is used in an image display device such as a liquid crystal display device.
As a manufacturing method of this type of polarizing film, a raw film roll (resin sheet member) is formed from a raw roll formed by winding a resin sheet member such as a strip-like polyvinyl alcohol-based resin (PVA) film as a raw roll into a roll shape. ) Is sent out to regulate the movement path of the original film, and stretched through an apparatus provided with a plurality of rollers for guiding the original film and various chemical baths. A method of moving the anti-film in the longitudinal direction and continuously immersing it in a swelling bath or a dyeing bath, and then niping the original film with the roller at two places in the front and rear, and applying the tension between them to implement the stretching Has been adopted.

ところで、この種の偏光フィルムの製造方法においては、原反ロールを交換する毎に改めて新しい原反フィルムをローラ等に巻き掛けて装置にセットするのは、非常に煩雑であり且つ時間を浪費するものであることから、先行する原反フィルムの末端部に次の原反ロールから繰り出された原反フィルムの先端部を接合して連結させてシート接合体を作製し、２つの原反フィルムを順次連続して偏光フィルムに加工することがなされている。
このようなシート接合体の製造方法としては、従来、粘着テープや接着剤などの接着接合手段、リベットや糸などによる縫合接合手段またはヒートシーラーなどによる加熱溶融接合手段などが採用されている。 By the way, in this type of polarizing film manufacturing method, it is very complicated and wastes time to wrap a new original film around a roller or the like every time the original film roll is replaced. Therefore, the end of the preceding original film is joined to the leading end of the original film fed from the next original roll, and connected to produce a sheet joined body. Processing into a polarizing film has been made sequentially.
As a method for producing such a sheet joined body, conventionally, an adhesive joining means such as an adhesive tape or an adhesive, a suture joining means such as a rivet or a thread, or a heat melting joining means such as a heat sealer has been employed.

しかしながら、上記のような方法においては、それぞれ下記のような問題を有している。
・粘着テープや接着剤などによる接着接合における問題点
膨潤浴、染色浴などに原反フィルムを浸漬させる工程において、接着剤の成分などが薬液に溶け出すことで、薬液を汚染し、製品への異物付着の要因となりうることに加え、接着剤が薬液に溶解されたり薬液の成分によって膨潤したりすることで接合強度が低下し、延伸工程において所望の延伸倍率に達する前に連結部に破断を生じさせるおそれを有する。
・リベットや糸などによる縫合接合における問題点
この方法では、原反フィルムにリベットや糸を通すための穴が穿設されることになるために連結部に張力が加わった場合に前記穴を起点とした破断を生じさせるおそれを有する。
このことを防止すべく穴数を減らして穴の間隔を広めに確保させると、張力が加わった際に、シワが生じやすくなって延伸ムラを生じさせるおそれを有する。
・ヒートシーラー等による加熱溶融接合における問題点
上記のような接着接合や縫合接合における問題点の解決を図り得る接合手段として、下記特許文献１及び２などに示すようなヒートシーラーによって接合する手段が知られている。
この方法では、接着接合に比べて薬液を汚染するおそれが低く、縫合接合のように穴を設ける必要がない。
しかし、ヒートシーラーでは、溶着領域、及び、その周辺は、溶着時に受けた熱によって変性して通常の部分に比べて硬化した状態となる傾向がある。
そのため、延伸時にこの溶着領域を挟んで張力が加えられるとこの硬化した箇所と通常の状態の箇所との境界部分に集中して応力が生じやすく、全体が所望の延伸倍率に至る前に当該領域が極端に延伸されるおそれを有する。
したがって、高い延伸倍率での延伸を実施させようとすると連結部において原反フィルムの破断を生じさせるおそれを有する。 However, each of the methods described above has the following problems.
・ Problems in adhesive bonding with adhesive tapes and adhesives In the process of immersing the raw film in a swelling bath or dyeing bath, the components of the adhesive dissolve into the chemical solution, contaminating the chemical solution, In addition to being a cause of foreign matter adhesion, the bonding strength is reduced by the adhesive being dissolved in the chemical or swollen by the components of the chemical, and the connecting portion is broken before reaching the desired draw ratio in the drawing process. There is a risk of causing it.
・ Problems in stitching with rivets and threads, etc. In this method, holes for passing rivets and threads are made in the original fabric film, so when the tension is applied to the connecting part, There is a risk of causing breakage.
In order to prevent this, if the number of holes is reduced to ensure a wide gap between the holes, when tension is applied, wrinkles are likely to occur and there is a risk of causing uneven drawing.
・ Problems in heat-melt bonding with heat sealers, etc. As bonding means that can solve the problems in adhesive bonding and suture bonding as described above, there are means for bonding with heat sealers as shown in Patent Documents 1 and 2 below. Are known.
In this method, there is a low risk of contaminating the drug solution as compared with adhesive bonding, and there is no need to provide a hole as in suture bonding.
However, in the heat sealer, the welding region and its periphery tend to be denatured by the heat received at the time of welding and become hardened as compared with a normal part.
Therefore, if tension is applied across this welded region during stretching, stress is likely to be concentrated at the boundary between the cured portion and the normal portion, and the region before the whole reaches the desired stretch ratio. May be extremely stretched.
Therefore, if stretching is performed at a high stretching ratio, there is a possibility that the raw film is broken at the connecting portion.

特開２００７−１７１８９７号公報JP 2007-171897 A 特開２０１０−８５０９号公報JP 2010-8509 A

例えば偏光フィルムに高い偏光機能を付与するためには、一般には５．２５倍以上の延伸を加えることが求められるが、ポリビニルアルコール系樹脂からなる原反フィルムを上記に示したような従来のシート接合体の製造方法で作成した場合には、５．２５倍以上の延伸負荷に連結部が耐えられず、破断を起こすおそれを有するため、連結部が通過する間の延伸倍率を５．２５倍未満に変更することで破断を回避させるような対策がなされている。
しかしながら上記のような回避策を選択した場合においては、設定を変えるために作業が煩雑となる。また、連結部前後の延伸倍率は所望の倍率（５．２５倍以上）とはなっていないことから、製品として用いることが出来ず、材料ロスを発生させるおそれがある。 For example, in order to impart a high polarizing function to a polarizing film, it is generally required to add a stretch of 5.25 times or more. However, a conventional sheet as described above is an original film made of a polyvinyl alcohol resin. When it is made by the manufacturing method of the joined body, the connecting portion cannot withstand a stretching load of 5.25 times or more and may break, so the stretching ratio while the connecting portion passes is 5.25 times. Measures are taken to avoid breaking by changing to less than.
However, when the above-described workaround is selected, the work becomes complicated to change the setting. In addition, since the stretch ratio before and after the connecting portion is not a desired ratio (5.25 times or more), it cannot be used as a product, and there is a risk of material loss.

すなわち、従来のシート接合体の製造方法においては、偏光フィルムを製造する場合には、高い偏光機能を有する偏光フィルムを効率良く製造することが難しいという問題を有していた。   That is, in the conventional method for producing a sheet joined body, when producing a polarizing film, it has been difficult to efficiently produce a polarizing film having a high polarizing function.

一方、上記したように、先行する原反フィルムの末端部に次の原反ロールの先端部を接合すれば、原反ロールを交換する毎に改めて新しい原反フィルムをローラ等に巻き掛けて装置にセットする煩雑さは回避され得る。しかしながら、かかる末端部と先端部とを接合するために、原反フィルムの繰り出しを一旦停止し、かかる停止の間、原反フィルムの搬送が停止すると、その間延伸が停止するため、従来のシート接合体の製造方法においては、製造効率が低下するという問題も有していた。   On the other hand, as described above, if the leading end of the next original roll is joined to the end of the preceding original film, a new original film is wound around a roller or the like every time the original roll is replaced. The troublesomeness of setting to can be avoided. However, in order to join the terminal portion and the tip portion, the feeding of the raw film is temporarily stopped, and during the stop, the conveyance of the raw film is stopped. The body manufacturing method also has a problem that the manufacturing efficiency is lowered.

本発明は、上記問題点に鑑み、接合部が薬液への含浸や延伸等の後段の処理領域で破断されることを抑制しつつ、接合に際して該処理領域への樹脂シート部材の搬送を停止することなく樹脂シート部材の接合が可能なシート接合体の製造方法及びシート接合体の製造装置を提供することを目的とする。   In view of the above-described problems, the present invention stops the conveyance of the resin sheet member to the processing region at the time of joining while suppressing the joining portion from being broken in a subsequent processing region such as impregnation with chemical solution or stretching. An object of the present invention is to provide a method for producing a sheet joined body and a sheet joined body producing apparatus capable of joining resin sheet members without any problems.

上記課題を解決するための本発明に係るシート接合体の製造方法は、
２以上の帯状の樹脂シート部材のうち先行して処理領域へと搬送される第１の樹脂シート部材と、次の第２の樹脂シート部材とを接合してシート接合体を作製するシート接合体の製造方法であって、
前記第２の樹脂シート部材の先端部を保持する第１の工程と、
該第１の工程で保持された前記先端部に光吸収剤を塗布する第２の工程と、
上流側から搬入される前記第１の樹脂シート部材を蓄積し且つ蓄積した前記第１の樹脂シート部材を下流側に搬出することにより、前記第１の樹脂シート部材の搬入速度と搬出速度とを異ならしめるように構成されたシート蓄積部を介して前記第１の樹脂シート部材を前記処理領域へと搬送し、前記シート蓄積部の下流側では前記第１の樹脂シート部材の搬送を継続しつつ、上流側では前記第１の樹脂シート部材の搬送を停止すると共に前記第１の樹脂シート部材を保持する第３の工程と、
該第３の工程で保持された前記第１の樹脂シート部材を、保持された部分が末端部を構成するように切断する第４の工程と、
前記先端部と前記末端部とを前記光吸収剤を挟んで重ね合わせる第５の工程と、
該第５の工程で重ね合わされた前記先端部及び末端部を加圧しつつレーザー溶着することによって接合する第６の工程と、
前記先端部及び末端部への加圧と、前記先端部及び末端部の保持とを解除して前記第１の樹脂シート部材に続いて前記第２の樹脂シート部材を前記処理領域へと搬送する第７の工程と、
を有することを特徴とする。
また、前記処理領域では、前記第１及び第２の樹脂シート部材を、浸漬浴中で長さ方向に５．２５倍以上に延伸する。
前記第５の工程では、重ね合わされた前記先端部及び末端部を、ガラス製部材と、該ガラス製部材よりもクッション性に優れたクッション層とを有する光透過性の加圧部材を用いて加圧しつつレーザー溶着する。
In order to solve the above problems, a method for producing a sheet joined body according to the present invention includes
A sheet joined body for producing a sheet joined body by joining a first resin sheet member that is transported to a processing region in advance among two or more strip-shaped resin sheet members, and the next second resin sheet member. A manufacturing method of
A first step of holding the tip of the second resin sheet member;
A second step of applying a light absorbent to the tip portion held in the first step;
By accumulating the first resin sheet member carried in from the upstream side and carrying out the accumulated first resin sheet member to the downstream side, the carry-in speed and carry-out speed of the first resin sheet member are set. The first resin sheet member is conveyed to the processing region via a sheet accumulation unit configured to be different, and the conveyance of the first resin sheet member is continued on the downstream side of the sheet accumulation unit. A third step of stopping the conveyance of the first resin sheet member and holding the first resin sheet member on the upstream side;
A fourth step of cutting the first resin sheet member held in the third step so that the held portion constitutes a terminal portion;
A fifth step of overlapping the tip portion and the end portion with the light absorber interposed therebetween;
A sixth step of joining by applying laser welding while pressurizing the tip and end overlapped in the fifth step;
Release the pressurization to the tip part and the terminal part and the holding of the tip part and the terminal part, and convey the second resin sheet member to the processing area following the first resin sheet member. A seventh step;
It is characterized by having.
Moreover, in the said process area | region, the said 1st and 2nd resin sheet member is extended | stretched 5.25 times or more in a length direction in an immersion bath.
In the fifth step, the overlapped tip and end portions are added using a light transmissive pressure member having a glass member and a cushion layer having a cushioning property superior to that of the glass member. Laser welding while pressing.

これにより、２以上の帯状の樹脂シート部材の内の先行する第１の樹脂シート部材の末端部と、次の第２の樹脂シート部材の先端部と、がレーザー溶着によって接合されることから、第１の樹脂シート部材に続いて該第１の樹脂シート部材と接合された第２の樹脂シート部材を処理する際、例えば薬液に浸漬される場合においては、接着剤等の使用によって接着接合する場合に比べて薬液が汚染されたり、該薬液によって接合強度が低下されたりするおそれが抑制され得る。
また、レーザー溶着を行うことにより、例えば延伸処理される場合においては、第１及び第２の樹脂シート部材を連続して延伸処理するに際して、接合部と非接合部との境界において破断の発生を回避することが可能となり、接合部を延伸処理する場合においても延伸条件を変更することなく、連続的に延伸を加えられる。
加えて、シート蓄積部を介して第１の樹脂シート部材を搬送することから、上記末端部と上記先端部とを接合する間、第１の樹脂シート部材を保持しても、該第１の樹脂シート部材の処理領域への搬送を継続することが可能となる。
従って、接合部が薬液への含浸や延伸等の後段の処理領域で破断されることを抑制しつつ、接合に際して該処理領域への樹脂シート部材の搬送を停止することなく樹脂シート部材の接合が可能となる。 Thereby, the end portion of the preceding first resin sheet member of the two or more strip-shaped resin sheet members and the tip portion of the next second resin sheet member are joined by laser welding, When the second resin sheet member bonded to the first resin sheet member is processed subsequent to the first resin sheet member, for example, when immersed in a chemical solution, the bonding is performed by using an adhesive or the like. Compared to the case, the possibility that the chemical solution is contaminated or the bonding strength is lowered by the chemical solution can be suppressed.
In addition, by performing laser welding, for example, in the case of stretching, when the first and second resin sheet members are continuously stretched, breakage occurs at the boundary between the bonded portion and the non-bonded portion. It becomes possible to avoid this, and even when the joint is stretched, stretching can be continuously applied without changing the stretching conditions.
In addition, since the first resin sheet member is transported via the sheet accumulating portion, the first resin sheet member is held even while the first end portion and the tip end portion are joined. It becomes possible to continue conveyance of the resin sheet member to the processing region.
Therefore, it is possible to bond the resin sheet member without stopping the conveyance of the resin sheet member to the processing region at the time of bonding while suppressing the bonding portion from being broken in the subsequent processing region such as impregnation with chemical solution or stretching. It becomes possible.

また、本発明に係るシート接合体の製造方法において、前記第１の樹脂シート部材において前記第４の工程での切断によって生成された不要部を巻き取ることによって、該不要部を回収する第８の工程を有することが好ましい。   Moreover, in the manufacturing method of the sheet | seat joined body which concerns on this invention, the said unnecessary part is collect | recovered by winding up the unnecessary part produced | generated by the cutting | disconnection by the said 4th process in a said 1st resin sheet member. It is preferable to have these steps.

これにより、上記不要部の除去が容易となる。   Thereby, the unnecessary part can be easily removed.

また、本発明に係るシート接合体の製造方法において、前記樹脂シート部材は、熱可塑性樹脂フィルムの単層であることが好ましい。   Moreover, in the manufacturing method of the sheet | seat joined body which concerns on this invention, it is preferable that the said resin sheet member is a single layer of a thermoplastic resin film.

これにより、シート接合体を作製し易くなる。   Thereby, it becomes easy to produce a sheet joined body.

また、本発明に係るシート接合体の製造方法において、前記樹脂シート部材は、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルムである。
Further, in the method of producing a sheet joined body according to the present invention, the resin sheet member, Ru polyvinyl alcohol film der to prepare a polarizing film.

これにより、後段で延伸処理を行う際、破断することなく延伸することが可能となるため、偏光フィルムに高い偏光機能を付与することが可能となる。また、延伸倍率を変更することなく連続して延伸処理を行うことが可能となるため、材料ロスの発生を回避することが可能となる。従って、高い偏光機能を有する偏光フィルムを効率良く製造することが可能となる。
また、前記先端部と前記末端部との重ね合わせ幅が、０．１ｍｍ以上１０．０ｍｍ未満であることが好ましい。
また、前記レーザー光のスポット径が、前記先端部と前記末端部との重ね合わせ幅の半値以上３倍以下であることが好ましい。
Thereby, when extending | stretching in a back | latter stage, since it becomes possible to extend | stretch without fracture | rupture, it becomes possible to provide a high polarizing function to a polarizing film. Moreover, since it becomes possible to perform a extending | stretching process continuously, without changing a draw ratio, it becomes possible to avoid generation | occurrence | production of material loss. Accordingly, it is possible to efficiently produce a polarizing film having a high polarization function.
Moreover, it is preferable that the overlap width of the said front-end | tip part and the said terminal part is 0.1 mm or more and less than 10.0 mm.
Moreover, it is preferable that the spot diameter of the laser beam is not less than a half value and not more than 3 times the overlapping width of the tip portion and the end portion.

また、本発明に係るシート接合体の製造装置は、
２以上の帯状の樹脂シート部材のうち先行して処理領域へと搬送される第１の樹脂シート部材と、次の第２の樹脂シート部材とを接合してシート接合体を作製するシート接合体の製造装置であって、
上流側から搬入される前記第１の樹脂シート部材を蓄積し且つ蓄積した前記第１の樹脂シート部材を下流側に搬出することにより、前記第１の樹脂シート部材の搬入速度と搬出速度とを異ならしめるように構成されており、下流側においては前記処理領域への前記第１の樹脂シート部材の搬送を継続しつつ、上流側においては前記第１の樹脂シート部材の搬送の停止を可能とするシート蓄積部と、
前記シート蓄積部よりも上流側に配置され、前記第１の樹脂シート部材の搬送停止に合わせて前記第１の樹脂シート部材を保持する第１の保持部と、
前記第１の樹脂シート部材を、前記第１の保持部に保持された部分が末端部を構成するように切断する切断部と、
前記第２の樹脂シート部材の先端部を保持する第２の保持部と、
前記第２の保持部に保持された先端部に光吸収剤を塗布する塗布部と、
前記先端部及び前記末端部の配置を、該先端部及び末端部が前記光吸収剤を挟んで重ね合わせられるように調整する配置調整部と、
前記先端部及び末端部の重ね合わせ部分を加圧する加圧部と、
前記加圧部によって加圧された前記重ね合わせ部分にレーザー光を照射して、前記先端部と前記末端部とをレーザー溶着により接合するレーザー光照射部と、
を備え、
前記加圧部による前記先端部及び末端部への加圧と、前記先端部及び末端部の保持とを解除することにより前記第１の樹脂シート部材に続いて前記第２の樹脂シート部材が前記処理領域へと搬送されるように構成されていることを特徴とする。
また、前記処理領域では、前記第１及び第２の樹脂シート部材が、浸漬浴中で長さ方向に５．２５倍以上に延伸されるように構成されている。
前記加圧部は、前記先端部及び末端部の重ね合わせ部分を加圧する、ガラス製部材と、該ガラス製部材よりもクッション性に優れたクッション層とを有する光透過性の加圧部材を備える。 In addition, the sheet bonded body manufacturing apparatus according to the present invention includes:
A sheet joined body for producing a sheet joined body by joining a first resin sheet member that is transported to a processing region in advance among two or more strip-shaped resin sheet members, and the next second resin sheet member. Manufacturing equipment,
By accumulating the first resin sheet member carried in from the upstream side and carrying out the accumulated first resin sheet member to the downstream side, the carry-in speed and carry-out speed of the first resin sheet member are set. The first resin sheet member can be stopped on the upstream side while continuing to convey the first resin sheet member to the processing region on the downstream side. Sheet storage unit to
A first holding unit that is arranged on the upstream side of the sheet storage unit and holds the first resin sheet member in accordance with the conveyance stop of the first resin sheet member;
A cutting portion for cutting the first resin sheet member so that a portion held by the first holding portion constitutes a terminal portion;
A second holding portion for holding a tip portion of the second resin sheet member;
An application unit for applying a light absorbent to the tip held by the second holding unit;
An arrangement adjusting unit that adjusts the arrangement of the tip and the end so that the tip and the end are overlapped with the light absorber interposed therebetween;
A pressurizing unit that pressurizes the overlapping portion of the tip and end, and
A laser beam irradiation unit that irradiates the overlapped portion pressed by the pressing unit with a laser beam, and joins the tip portion and the end portion by laser welding,
With
The second resin sheet member follows the first resin sheet member by releasing the pressure applied to the tip part and the terminal part by the pressurizing part and the holding of the tip part and the terminal part. It is configured to be conveyed to a processing area.
Moreover, in the said process area | region, the said 1st and 2nd resin sheet member is comprised so that 5.25 times may be extended | stretched in the length direction in an immersion bath.
The pressurizing unit includes a light-transmitting pressurizing member having a glass member that pressurizes the overlapping portion of the tip portion and the end portion, and a cushion layer having better cushioning properties than the glass member. .

これにより、２以上の帯状の樹脂シート部材の内の先行する第１の樹脂シート部材の末端部と、次の第２の樹脂シート部材の先端部と、がレーザー溶着によって接合されることから、第１の樹脂シート部材に続いて該第１の樹脂シート部材と接合された第２の樹脂シート部材を処理する際、例えば薬液に浸漬される場合においては、接着剤等の使用によって接着接合する場合に比べて薬液が汚染されたり、該薬液によって接合強度が低下されたりするおそれが抑制され得る。
また、レーザー溶着を行うことにより、例えば延伸処理される場合においては、第１及び第２の樹脂シート部材を連続して延伸処理するに際して、接合部と非接合部との境界において破断の発生を回避することが可能となり、接合部を延伸処理する場合においても延伸条件を変更することなく、連続的に延伸を加えられる。
加えて、シート蓄積部を介して第１の樹脂シート部材を搬送することから、上記末端部と上記先端部とを接合する間、第１の樹脂シート部材を保持しても、該第１の樹脂シート部材の処理領域への搬送を継続することが可能となる。
従って、接合部が薬液への含浸や延伸等の後段の処理領域で破断されることを抑制しつつ、接合に際して該処理領域への樹脂シート部材の搬送を停止することなく樹脂シート部材の接合が可能となる。 Thereby, the end portion of the preceding first resin sheet member of the two or more strip-shaped resin sheet members and the tip portion of the next second resin sheet member are joined by laser welding, When the second resin sheet member bonded to the first resin sheet member is processed subsequent to the first resin sheet member, for example, when immersed in a chemical solution, the bonding is performed by using an adhesive or the like. Compared to the case, the possibility that the chemical solution is contaminated or the bonding strength is lowered by the chemical solution can be suppressed.
In addition, by performing laser welding, for example, in the case of stretching, when the first and second resin sheet members are continuously stretched, breakage occurs at the boundary between the bonded portion and the non-bonded portion. It becomes possible to avoid this, and even when the joint is stretched, stretching can be continuously applied without changing the stretching conditions.
In addition, since the first resin sheet member is transported via the sheet accumulating portion, the first resin sheet member is held even while the first end portion and the tip end portion are joined. It becomes possible to continue conveyance of the resin sheet member to the processing region.
Therefore, it is possible to bond the resin sheet member without stopping the conveyance of the resin sheet member to the processing region at the time of bonding while suppressing the bonding portion from being broken in the subsequent processing region such as impregnation with chemical solution or stretching. It becomes possible.

また、本発明に係るレーザー接合体の製造装置において、前記第１の樹脂シート部材は、該第１の樹脂シート部材を巻き取り可能な送り出し部に装着されており、該送り出し部が、前記第１の樹脂シート部材において前記切断部による切断によって生成された不要部を巻き取ることによって、該不要部を回収するように構成されていることが好ましい。   In the laser joined body manufacturing apparatus according to the present invention, the first resin sheet member is attached to a feed-out part capable of winding up the first resin sheet member, and the feed-out part is connected to the first resin sheet member. It is preferable that the unnecessary portion is collected by winding up the unnecessary portion generated by cutting by the cutting portion in one resin sheet member.

これにより、上記不要部の除去が容易となる。   Thereby, the unnecessary part can be easily removed.

また、本発明に係るレーザー接合体の製造装置において、前記樹脂シート部材は、熱可塑性樹脂フィルムの単層であることが好ましい。   In the laser joined body manufacturing apparatus according to the present invention, the resin sheet member is preferably a single layer of a thermoplastic resin film.

これにより、シート接合体を作製し易くなる。   Thereby, it becomes easy to produce a sheet joined body.

また、本発明に係るレーザー接合体の製造装置において、前記樹脂シート部材は、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルムである。
In the manufacturing apparatus of the laser assembly according to the present invention, the resin sheet member, Ru polyvinyl alcohol film der to prepare a polarizing film.

これにより、後段で延伸処理を行う際、破断することなく延伸することが可能となるため、偏光フィルムに高い偏光機能を付与することが可能となる。また、延伸倍率を変更することなく連続して延伸処理を行うことが可能となるため、材料ロスの発生を回避することが可能となる。従って、高い偏光機能を有する偏光フィルムを効率良く製造することが可能となる。
また、前記先端部と前記末端部との重ね合わせ幅が、０．１ｍｍ以上１０．０ｍｍ未満であることが好ましい。
また、前記レーザー光のスポット径が、前記先端部と前記末端部との重ね合わせ幅の半値以上３倍以下であることが好ましい。
Thereby, when extending | stretching in a back | latter stage, since it becomes possible to extend | stretch without fracture | rupture, it becomes possible to provide a high polarizing function to a polarizing film. Moreover, since it becomes possible to perform a extending | stretching process continuously, without changing a draw ratio, it becomes possible to avoid generation | occurrence | production of material loss. Accordingly, it is possible to efficiently produce a polarizing film having a high polarization function.
Moreover, it is preferable that the overlap width of the said front-end | tip part and the said terminal part is 0.1 mm or more and less than 10.0 mm.
Moreover, it is preferable that the spot diameter of the laser beam is not less than a half value and not more than 3 times the overlapping width of the tip portion and the end portion.

以上の通り、本発明によれば、接合部が薬液への含浸や延伸等の後段の処理領域で破断されることを抑制しつつ、接合に際して該処理領域への樹脂シート部材の搬送を停止することなく樹脂シート部材の接合が可能となる。   As described above, according to the present invention, the conveyance of the resin sheet member to the processing region is stopped at the time of bonding while suppressing the breakage of the bonding portion in the subsequent processing region such as impregnation or stretching with a chemical solution. The resin sheet member can be joined without any problem.

一実施形態の接合装置を示す概略側面図The schematic side view which shows the joining apparatus of one Embodiment. アキュムレータの概略側面図Schematic side view of accumulator 新原反フィルムの先端部が保持された状態を模式的に示す概略側面図Schematic side view schematically showing a state in which the leading edge of the new raw film is held 新原反フィルムの先端部に光吸収剤が塗布される状態を模式的に示す概略側面図Schematic side view schematically showing a state in which a light absorbent is applied to the tip of a new raw film アキュムレータの上流側において旧原反フィルムの搬送が停止された状態を模式的に示す概略側面図Schematic side view schematically showing a state in which the conveyance of the old original film is stopped on the upstream side of the accumulator 旧原反フィルムが保持され、切断された状態を模式的に示す概略側面図Schematic side view schematically showing the state where the old film is held and cut 新原反フィルムを移動させて旧原反フィルムと重ね合わせた状態を模式的に示す概略側面図Schematic side view schematically showing a state where the new original film is moved and overlapped with the old original film 重ね合わせ部分が加圧された状態を模式的に示す概略側面図Schematic side view schematically showing a state where the overlapped portion is pressurized 重ね合わせ部分にレーザー光が照射される状態を模式的に示す概略側面図Schematic side view schematically showing a state in which the overlapped portion is irradiated with laser light 重ね合わせ部分に対する加圧、新旧原反フィルムの保持が解除された状態を模式的に示す概略側面図Schematic side view schematically showing the state where the pressure on the overlapped part and the holding of the old and new original film are released 新旧原反フィルムの搬送が再開された状態を模式的に示す概略側面図Schematic side view schematically showing a state where conveyance of the old and new original film is resumed 新旧原反フィルムの重ね合わせ方法における別の一例を示す概略側面図Schematic side view showing another example of old and new original film overlay method 新旧原反フィルムが搬送される延伸装置の一例を示す概略斜視図Schematic perspective view showing an example of a stretching apparatus for transporting old and new original film

以下に本発明の実施の形態について説明する。
まず、本実施形態のシート接合体の製造方法及びシート接合体の製造装置について図面を参照しつつ説明する。
図１は、本実施形態の接合装置（製造装置）１００の一例を模式的に示す概略側面図である。 Embodiments of the present invention will be described below.
First, a manufacturing method of a sheet joined body and a manufacturing apparatus of a sheet joined body of this embodiment will be described with reference to the drawings.
FIG. 1 is a schematic side view schematically illustrating an example of a bonding apparatus (manufacturing apparatus) 100 according to the present embodiment.

接合装置１００は、２以上の帯状の樹脂シート部材（原反フィルム）１のうち先行して送り出され処理工程（処理領域）に搬送される第１の樹脂シート部材（旧原反フィルム）１ａの末端部と、次の第２の樹脂シート部材（新原反フィルム）１ｂの先端部と、を接合するようになっており、旧原反フィルム１ａに続いて新原反フィルム１ｂが処理工程へと連続して搬送されて、処理されるようになっている。   The joining apparatus 100 includes a first resin sheet member (former original film) 1a that is sent out in advance among two or more belt-shaped resin sheet members (original film) 1 and conveyed to a processing step (processing region). The end portion and the leading end portion of the next second resin sheet member (new original film) 1b are joined, and the new original film 1b continues to the processing step following the old original film 1a. Then, it is conveyed and processed.

接合装置１００によって接合される２以上の原反フィルム１としては、互いに接合される表面に熱可塑性樹層を有していれば、熱可塑性樹脂の単層から形成されていても、熱可塑性樹脂層とその他の樹脂層とが積層されて形成されていてもよく、特に限定されるものではないが、熱可塑性樹脂の単層から形成されたものであることが好ましい。これにより、シート接合体の作製が容易となる。また、かかる樹脂シート部材としては、互いに同種の熱可塑性樹脂から構成されたものであるのが一般的であるが、本発明は、同種のものである場合に限定されず、互いに熱融着可能な材質であれば、異なる種類のものであってもよい。   As the two or more original fabric films 1 to be joined by the joining device 100, the thermoplastic resin may be formed from a single layer of thermoplastic resin as long as it has a thermoplastic resin layer on the surfaces to be joined to each other. The layer and other resin layers may be formed by being laminated, and are not particularly limited, but are preferably formed from a single layer of thermoplastic resin. Thereby, preparation of a sheet joined body becomes easy. The resin sheet member is generally composed of the same kind of thermoplastic resin, but the present invention is not limited to the same kind of resin sheet and can be heat-sealed to each other. Different materials may be used as long as they are different materials.

このような熱可塑性樹脂としては、例えば、ポリカーボネート、ポリビニルアルコール、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレート、ポリ塩化ビニル、熱可塑性ポリイミド、トリアセチルセルロース、ポリメチルメタクリレート、シクロオレフィンポリマー、ノルボルネン樹脂、ポリオキシメチレン、ポリエーテルエーテルケトン、ポリエーテルイミド、ポリアミドイミド、ポリブタジエン、ポリウレタン、ポリスチレン、ポリメチルペンテン、ポリアミド、ポリアセタール、ポリブチレンテレフタレート、エチレンビニルアセテートなどを挙げることができる。
また、かかる樹脂シート部材がロールトゥロールで搬送されることを考慮して、その厚みは１μｍ以上２ｍｍ以下であることが好ましく、１０μｍ以上２００μｍ以下であることが好ましい。 Examples of such thermoplastic resins include polycarbonate, polyvinyl alcohol, polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, thermoplastic polyimide, triacetyl cellulose, polymethyl methacrylate, cycloolefin polymer, norbornene resin, polyoxymethylene, Examples include polyetheretherketone, polyetherimide, polyamideimide, polybutadiene, polyurethane, polystyrene, polymethylpentene, polyamide, polyacetal, polybutylene terephthalate, and ethylene vinyl acetate.
Further, considering that the resin sheet member is conveyed by roll-to-roll, the thickness is preferably 1 μm or more and 2 mm or less, and preferably 10 μm or more and 200 μm or less.

また、樹脂シート部材としては、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルム、すなわちポリビニルアルコール系高分子樹脂材料からなるフィルムを用いる。これにより、後段で延伸処理を行う際、破断することなく延伸することが可能となるため、偏光フィルムに高い偏光機能を付与することが可能となる。
The resin sheet member, a polyvinyl alcohol film to prepare a polarizing film, that is Ru with a film comprising a polyvinyl alcohol-based polymeric resin material. Thereby, when extending | stretching in a back | latter stage, since it becomes possible to extend | stretch without fracture | rupture, it becomes possible to provide a high polarizing function to a polarizing film.

かかるポリビニルアルコール系樹脂フィルムとして、具体的には、例えば、ポリビニルアルコールフィルム、部分ケン化ポリビニルアルコールフィルム又はポリビニルアルコールの脱水処理フィルムなどを用いることができる。
前記ポリビニルアルコール系樹脂フィルムの形成材料であるポリマーの重合度は、一般に５００〜１０，０００であり、１，０００〜６，０００の範囲であることが好ましく、１，４００〜４，０００の範囲にあることがより好ましい。
さらに、部分ケン化ポリビニルアルコールフィルムの場合、そのケン化度は、例えば、水への溶解性の点から、７５モル％以上が好ましく、より好ましくは９８モル％以上であり、９８．３〜９９．８モル％の範囲にあることがより好ましい。 Specifically, for example, a polyvinyl alcohol film, a partially saponified polyvinyl alcohol film, or a polyvinyl alcohol dehydration film can be used as the polyvinyl alcohol-based resin film.
The polymerization degree of the polymer that is a material for forming the polyvinyl alcohol-based resin film is generally 500 to 10,000, preferably in the range of 1,000 to 6,000, and in the range of 1,400 to 4,000. More preferably.
Furthermore, in the case of a partially saponified polyvinyl alcohol film, the degree of saponification is preferably 75 mol% or more, more preferably 98 mol% or more, for example, from the viewpoint of solubility in water, and 98.3 to 99. More preferably, it is in the range of 8 mol%.

接合装置１００は、第１の送り出し部（送り出し部）２１、第１の保持部２２、切断部２３、第２の送り出し部２４、第２の保持部２５、ステージ２６、レーザー光照射部２７、加圧部２８、塗布部２９、配置調整部３１、アキュムレータ（シート蓄積部）３２を備えている。   The bonding apparatus 100 includes a first delivery unit (feeding unit) 21, a first holding unit 22, a cutting unit 23, a second delivery unit 24, a second holding unit 25, a stage 26, a laser beam irradiation unit 27, A pressurizing unit 28, a coating unit 29, an arrangement adjusting unit 31, and an accumulator (sheet accumulating unit) 32 are provided.

第１の送り出し部２１は、ロール状に巻回された旧原反フィルム１ａを、これを送り出す正方向と巻き取る逆方向とに回転させることができ、正方向に回転させることにより、旧原反フィルム１ａを送り出すことができる。かかる第１の送り出し部２１は、巻回された旧原反フィルム１ａの中空部が装着されるローラ部材から形成されるようになっている。   The first delivery part 21 can rotate the old original film 1a wound in a roll shape in the forward direction in which it is sent out and in the reverse direction in which it is wound up. The anti-film 1a can be sent out. The first delivery portion 21 is formed of a roller member to which a hollow portion of the wound old original film 1a is attached.

第１の保持部２２は、平坦な上面部を有しており、かかる上面部は、第１の送り出し部２１から送り出された旧原反フィルム１ａの下方に配置されるようになっている。また、かかる上面部には、孔が複数形成されており、不図示の第１の吸引部材によって、当該上面部に対して旧原反フィルム１ａが吸引されて保持されるようになっている。そして、後述するように、旧原反フィルム１ａの送り出し（アキュムレータ３２の上流側の搬送）が停止すると、かかる停止に合わせて上記第１の吸引部材が作動して、旧原反フィルム１ａが第１の保持部２２に保持されるようになっている。   The first holding portion 22 has a flat upper surface portion, and the upper surface portion is arranged below the old original film 1 a fed from the first feeding portion 21. Further, a plurality of holes are formed in the upper surface portion, and the old original film 1a is sucked and held with respect to the upper surface portion by a first suction member (not shown). Then, as will be described later, when the feeding of the old original film 1a (the conveyance on the upstream side of the accumulator 32) is stopped, the first suction member is operated in accordance with the stop, and the old original film 1a is 1 is held by one holding portion 22.

切断部２３は、旧原反フィルム１ａを切断するためのものであり、刃物２３ａとその受け部２３ｂ等から形成されている。かかる切断部２３は、旧原反フィルム１ａにおける第１の保持部２２に保持された部分の上流側（図１の右側）において、後述する新原反フィルム１ｂの先端部１ｂａと重なり合う部分を残して切断するようになっている。このように切断部２３によって切断されることにより、旧原反フィルム１ａは、処理工程に搬送されて処理される旧原反フィルム１ａの末端部１ａａと、処理されない不要部（図６参照）とが形成されるようになっている。   The cutting part 23 is for cutting the old original film 1a, and is formed of a blade 23a and its receiving part 23b. The cutting portion 23 leaves a portion that overlaps the tip portion 1ba of the new original film 1b described later on the upstream side (right side in FIG. 1) of the portion held by the first holding portion 22 in the old original film 1a. It is designed to cut. By being cut by the cutting part 23 in this way, the old original film 1a is transported to the processing step and processed at the end part 1aa of the old original film 1a, and an unprocessed unnecessary part (see FIG. 6). Is to be formed.

第２の送り出し部２４は、ロール状に巻回された新原反フィルム１ｂを、これを送り出す正方向と巻き取る逆方向とに回転させることができ、正方向に回転させることにより、新原反フィルム１ｂを送り出すことができる。かかる第２の送り出し部２４は、巻回された新原反フィルム１ｂの中空部が装着されるローラ部材から形成されるようになっている。   The second delivery section 24 can rotate the new original film 1b wound in a roll shape in the forward direction for feeding it out and in the reverse direction for winding it. 1b can be sent out. The second delivery portion 24 is formed of a roller member to which a hollow portion of the wound new original film 1b is attached.

第２の保持部２５は、平坦な上面部を有しており、かかる上面部が、第２の送り出し部２４から送り出された新原反フィルム１ｂの下方に配置されるようになっている。また、かかる上面部には、孔が複数形成されており、不図示の第２の吸引部材によって、当該上面部に対して新原反フィルム１ｂが吸引されて保持されるようになっている。そして、新原反フィルム１ｂの先端部１ｂａが、第２の保持部２５及び後述するステージ２６の上面に重なると、新原反フィルム１ｂの送り出しが停止し、かかる停止に合わせて上記第２の吸引部材が作動し、先端部１ｂａが第２の保持部２５に保持されるようになっている。   The second holding part 25 has a flat upper surface part, and the upper surface part is arranged below the new original film 1b fed from the second feeding part 24. In addition, a plurality of holes are formed in the upper surface portion, and the new original film 1b is sucked and held with respect to the upper surface portion by a second suction member (not shown). And when the front-end | tip part 1ba of the new original fabric film 1b overlaps the upper surface of the 2nd holding | maintenance part 25 and the stage 26 mentioned later, sending out of the new original fabric film 1b will stop, and said 2nd suction member according to this stop Is operated, and the tip end portion 1ba is held by the second holding portion 25.

また、第１の送り出し部２１、第２の送り出し部２４は、これらの位置を相互に入れ替えるように回転することが可能な配置可変部４１に設けられている。そして、後述するように新旧原反フィルム１ａ、１ｂの接合後、配置可変部４１が回転することにより、新原反フィルム１ｂが旧原反フィルム１ａの位置（図１の上方）に配置され、この位置において新原反フィルム１ｂが順次繰り出されるようになっている。このとき、下方に配置される旧原反フィルム１ａは、配置可変部４１から取り外され、新原反フィルム１ｂの次の原反フィルムが新たに装着されるようになっている。   Moreover, the 1st delivery part 21 and the 2nd delivery part 24 are provided in the arrangement | positioning variable part 41 which can rotate so that these positions may mutually be replaced. Then, as will be described later, after the old and new original films 1a and 1b are joined, the arrangement variable portion 41 rotates, whereby the new original film 1b is arranged at the position of the old original film 1a (upper side in FIG. 1). The new original film 1b is fed out sequentially at the position. At this time, the old original film 1a arranged below is removed from the arrangement variable portion 41, and the original film next to the new original film 1b is newly attached.

ステージ２６は、平坦な上面部を有しており、第２の保持部２５の下流側（図１の左側）に隣接して配置されている。かかるステージ２６の材質としては、金属、セラミックス、樹脂、ラバー等を用いることができる。これらのうち、ステージ２６の材質としてラバーを用いることが好ましく、これにより、後述するように、旧原反フィルム１ａの末端部１ａａと新原反フィルム１ｂの先端部１ｂａとの重なり合わされた部分を挟んで加圧部２８がステージ２６を加圧する際、広い面積を均一に加圧することができる。従って、後述するレーザー光の照射により、上記重なり合わされた部分において良好な接合状態を得ることができる。さらに、末端部１ａａと先端部１ｂａとの接合後において、末端部１ａａとの剥離性を高めるためや、耐熱性を高めるために、上記ラバーの表面を表面処理することや、上記ラバーの表面に樹脂部材を積層することもできる。   The stage 26 has a flat upper surface portion and is disposed adjacent to the downstream side (left side in FIG. 1) of the second holding portion 25. As the material of the stage 26, metal, ceramics, resin, rubber or the like can be used. Among these, it is preferable to use rubber as the material of the stage 26, so that, as will be described later, the overlapping portion of the end portion 1aa of the old original film 1a and the front end portion 1ba of the new original film 1b is sandwiched. When the pressurizing unit 28 pressurizes the stage 26, a large area can be uniformly pressed. Therefore, a good bonding state can be obtained in the overlapped portion by laser light irradiation described later. Further, after joining the end portion 1aa and the tip portion 1ba, in order to improve the peelability from the end portion 1aa and to improve heat resistance, the surface of the rubber may be subjected to surface treatment or A resin member can also be laminated.

レーザー光照射部２７は、レーザー光源を有しており、ステージ２６の上方に配置されている。また、加圧部２８は、ステージ２６の上方であってレーザー光照射部２７の下方において、上下方向に移動可能に配置されている。そして、先行する旧原反フィルム１ａの末端部１ａａと、これに接合される新原反フィルム１ｂの先端部１ｂａとをステージ２６上において上下に重ね合わせ、この重ね合わせた部分を加圧部２８で加圧しつつレーザー光照射部２７からレーザー光Ｒを照射することにより、末端部１ａａと先端部１ｂａとの界面部を加熱溶融させて溶着させ、両者を接合し得るように構成されている。また、加圧部２８は、レーザー光Ｒの透過性に優れた透明な部材で構成されている。   The laser light irradiation unit 27 has a laser light source and is disposed above the stage 26. The pressurizing unit 28 is disposed above the stage 26 and below the laser light irradiation unit 27 so as to be movable in the vertical direction. Then, the leading end 1aa of the preceding old original film 1a and the leading end 1ba of the new original film 1b to be joined to each other are vertically overlapped on the stage 26. By irradiating the laser beam R from the laser beam irradiation unit 27 while applying pressure, the interface portion between the end portion 1aa and the tip portion 1ba is heated and melted and welded, and both can be joined. Moreover, the pressurizing part 28 is comprised with the transparent member excellent in the transmittance | permeability of the laser beam R. FIG.

上記レーザー光源の種類は特に限定がされるものではないが、用いるレーザー光は、新旧原反フィルム１ａ、１ｂを重ね合わせた部分における新旧原反フィルムの界面において新原反フィルム１ｂの上面に塗布するなどして配置された光吸収剤によって吸収され、発熱させる役目を担うものであって、用いる光吸収剤の吸収感度の高い波長を有することが好ましい。   The type of the laser light source is not particularly limited, but the laser light to be used is applied to the upper surface of the new original film 1b at the interface between the old and new original film at the portion where the old and new original films 1a and 1b are overlapped. It is preferable to have a wavelength with high absorption sensitivity of the light absorbent to be used.

具体的には、レーザー光の種類としては、可視光域もしくは赤外線域の波長を有する半導体レーザー、ファイバーレーザー、フェムト秒レーザー、ピコ秒レーザー、ＹＡＧレーザーなどの固体レーザー、ＣＯ2レーザーなどのガスレーザーが挙げられる。
なかでも、安価で且つ面内均一なレーザービームが容易に得られる半導体レーザーやファイバーレーザーが好ましい。
また、原反フィルムの分解を避けつつ溶融を促す目的においては、瞬間的に高いエネルギーが投入されるパルスレーザーよりも連続波のＣＷレーザーのほうが好ましい。
レーザー光の出力（パワー）、ビームサイズ及び形状、照射回数、更に走査速度などは、対象となる原反フィルム及び光吸収剤の光吸収率といった光学特性や原反フィルムを構成しているポリマーの融点、ガラス転移点（Ｔｇ）といった熱特性などの違いに対して適宜最適化されればよいが、レーザー光が照射された部分においてポリビニルアルコール系樹脂を効率的に流動化させて強固な接合を得るために、照射するレーザー光のパワー密度としては、２００Ｗ／ｃｍ2〜１０，０００Ｗ／ｃｍ2の範囲内であることが好ましく、３００Ｗ／ｃｍ2〜５，０００Ｗ／ｃｍ2の範囲内であることがさらに好ましく、１,０００Ｗ／ｃｍ2〜３，０００Ｗ／ｃｍ2の範囲内であることが特に好ましい。 Specifically, the types of laser light include semiconductor lasers having wavelengths in the visible or infrared range, fiber lasers, femtosecond lasers, picosecond lasers, solid lasers such as YAG lasers, and gas lasers such as CO 2 lasers. Is mentioned.
Among these, a semiconductor laser and a fiber laser that can easily obtain a laser beam that is inexpensive and uniform in the plane are preferable.
For the purpose of accelerating melting while avoiding decomposition of the raw film, a continuous wave CW laser is preferable to a pulsed laser in which high energy is instantaneously input.
The output (power) of the laser beam, the beam size and shape, the number of irradiations, the scanning speed, etc. are the optical properties such as the target film and the light absorptivity of the light absorber and the polymer constituting the film. It may be optimized as appropriate for the difference in thermal characteristics such as melting point and glass transition point (Tg), but the polyvinyl alcohol resin is efficiently fluidized in the portion irradiated with the laser beam for strong bonding. to obtain, as the power density of the irradiated laser beam, it is preferably in the range of 300W / cm 2 ~5,000W / cm 2 in the range of 200W / cm 2 ~10,000W / cm 2 it is more preferable, and particularly preferably in the range of 1,000W / cm 2 ~3,000W / cm 2 .

また、上記レーザー光源は、新旧原反フィルム１ａ、１ｂの界面において所定の大きさのスポット径（照射巾）でレーザー光を照射しうるものが好ましい。
この照射スポット径（照射巾）としては、上記照射レーザーパワー密度を満たすパワーにて、新旧原反フィルム１ａ、１ｂの重ね合わせ幅の半値以上３倍以下が好ましい。
重ね合わせ幅の半値未満では、重ね合わせ部の未接合部が大きく、接合後に搬送する際にばたついて、良好な搬送性を阻害するおそれを有する。
また、３倍以上の巾でレーザー光を照射すると、接合及び延伸特性には影響は及ぼさないものの、エネルギー利用効率の観点からは好ましくない。
好ましくは、重ね合わせ幅と同値以上２倍以下である。
なお、新旧原反フィルム１ａ、１ｂの重ね合せ幅は、０．１ｍｍ以上１０．０ｍｍ未満とすることが好ましく、０．５ｍｍ以上５ｍｍ未満とすることが更に好ましい。
これは、重ね合わせ幅が０．１ｍｍ未満では、繰り返し精度よく広幅な原反フィルム１を重ね合わせ配置することが難しいためであり、１０．０ｍｍ以上になると、未接合部の形成を防止するためにレーザー光を１０．０ｍｍ巾以上で照射する必要が生じることから必要なエネルギーが高くなり、省エネルギーの観点から好ましくないためである。 The laser light source is preferably capable of irradiating laser light with a spot diameter (irradiation width) of a predetermined size at the interface between the old and new original film 1a and 1b.
The irradiation spot diameter (irradiation width) is preferably not less than a half value and not more than three times the overlapping width of the old and new original films 1a and 1b at a power satisfying the irradiation laser power density.
If the overlap width is less than half the value, the unjoined portion of the overlap portion is large, and it may flutter when transported after joining, thereby hindering good transportability.
In addition, irradiation with laser light with a width of 3 times or more does not affect the bonding and stretching characteristics, but is not preferable from the viewpoint of energy utilization efficiency.
Preferably, it is equal to or more than twice the overlap width.
The overlapping width of the old and new original film 1a, 1b is preferably 0.1 mm or more and less than 10.0 mm, and more preferably 0.5 mm or more and less than 5 mm.
This is because when the overlap width is less than 0.1 mm, it is difficult to overlap and arrange the wide original film 1 with high repeatability. When the overlap width is 10.0 mm or more, formation of an unjoined portion is prevented. This is because it is necessary to irradiate the laser beam with a width of 10.0 mm or more, so that the required energy becomes high, which is not preferable from the viewpoint of energy saving.

なお、レーザー光の積算照射量としては、５Ｊ／ｃｍ2〜４００Ｊ／ｃｍ2の範囲内であることが好ましく、１０Ｊ／ｃｍ2〜３００Ｊ／ｃｍ2の範囲内であることが更に好ましく、３０Ｊ／ｃｍ2〜１５０Ｊ／ｃｍ2の範囲内であることが特に好ましい。
したがって、これらの条件を満たすことのできるレーザー光源を有するレーザー光照射部２７を接合装置１００に採用することが好ましい。 As the integrated irradiation dose of the laser beam is preferably in a range of 5J / cm 2 ~400J / cm 2 , more preferably in the range of 10J / cm 2 ~300J / cm 2 , 30J / Particularly preferably, it is within the range of cm 2 to 150 J / cm 2 .
Therefore, it is preferable to employ the laser beam irradiation unit 27 having a laser light source that can satisfy these conditions in the bonding apparatus 100.

また、上記した加圧部２８は、用いるレーザー光に対して高い透明性を示すガラス製の加圧部材を有している。
レーザー光の照射に際する加圧強度としては、０．５〜１００ｋｇｆ／ｃｍ2の範囲内であることが好ましく、１０〜７０ｋｇｆ／ｃｍ2の範囲内であることが更に好ましい。
したがって、加圧部材としては、このような強度で加圧することが可能な部材であればそのガラス製部材の形状は特に限定されず、例えば、平板、円筒、球状のものを使用することが出来る。
ガラス製部材の厚みは特に限定されないが、薄すぎると歪みによって良好な加圧ができず、厚すぎるとレーザー光の利用効率が下がるため、レーザー光が透過する方向における厚みが３ｍｍ以上３０ｍｍ未満であることが好ましく、５ｍｍ以上２０ｍｍ未満であることが更に好ましい。 Moreover, the above-mentioned pressurization part 28 has the pressurization member made from glass which shows high transparency with respect to the laser beam to be used.
As the vulcanizing pressure strength that during the irradiation of the laser beam is preferably in a range of 0.5~100kgf / cm 2, and more preferably in the range of 10~70kgf / cm 2.
Accordingly, the shape of the glass member is not particularly limited as long as it is a member that can be pressed with such strength, and for example, a flat plate, a cylinder, or a spherical member can be used. .
The thickness of the glass member is not particularly limited, but if it is too thin, good pressure cannot be applied due to strain, and if it is too thick, the laser light utilization efficiency decreases, so the thickness in the direction of transmitting laser light is 3 mm or more and less than 30 mm. It is preferable that it is 5 mm or more and less than 20 mm.

加圧部材の材質としては、例えば、石英ガラス、無アルカリガラス、テンパックス、パイレックス、バイコール、Ｄ２６３、ＯＡ１０、ＡＦ４５などが挙げられる。
レーザー光の利用効率を高めるために、加圧部材として利用するガラス製部材は、用いるレーザー光波長に対して高い透明性を有することが好ましく、５０％以上の光透過率を有していることが好ましく、７０％以上の光透過率を有していることが更に好ましい。 Examples of the material of the pressure member include quartz glass, non-alkali glass, Tempax, Pyrex, Vycor, D263, OA10, AF45, and the like.
In order to increase the utilization efficiency of laser light, the glass member used as the pressure member preferably has high transparency with respect to the laser light wavelength to be used, and has a light transmittance of 50% or more. It is more preferable that it has a light transmittance of 70% or more.

なお、加圧部材を上記のようなガラス製の部材を用いて構成させる場合には、より広い面積をより均一に加圧して全域にわたって良好な接合を行わせ得るように、原反フィルムと接する部分に、上記ガラス製部材よりもクッション性に優れたクッション層を形成させることもできる。
すなわち、光透過性の良好なラバーシートやクッション性を有する透明樹脂シート等を備えた加圧部材を採用することもでき、例えば、背面側がガラス製部材で構成され、原反フィルムと接する前面側が透明ラバーシートで構成された加圧部２８を採用することができる。 In addition, when making a pressurization member using the above glass members, it contacts with a raw film so that a larger area can be pressurized more uniformly and it can perform favorable joining over the whole region. A cushion layer having better cushioning properties than the glass member can be formed on the portion.
That is, a pressure member provided with a rubber sheet having good light transmittance, a transparent resin sheet having a cushioning property, or the like can be employed. For example, the back side is made of a glass member, and the front side in contact with the raw film is The pressurization part 28 comprised with the transparent rubber sheet is employable.

上記クッション層の形成には、例えば、シリコンラバー、ウレタンラバーなどのゴム系材料やポリエチレンなどの樹脂材料を用いることが出来る。
このクッション層の厚みは、５０μｍ以上５ｍｍ未満であることが好ましく、１ｍｍ以上３ｍｍ未満が更に好ましい。
５０μｍ未満であると、クッション性に乏しく、５ｍｍ以上の場合は、当該クッション層によってレーザー光の吸収や散乱が生じ、末端部１ａａと先端部１ｂａとの接触界面部に到達するレーザー光のエネルギーを低下させるおそれを有する。
このクッション層は、用いるレーザー光波長に対して３０％以上の光透過率を有することが好ましく、５０％以上が更に好ましい。
また、かかるクッション層と同様のクッション層を、ステージ２６の上面に配することもできる。 For the formation of the cushion layer, for example, a rubber material such as silicon rubber or urethane rubber or a resin material such as polyethylene can be used.
The thickness of the cushion layer is preferably 50 μm or more and less than 5 mm, more preferably 1 mm or more and less than 3 mm.
When the thickness is less than 50 μm, the cushioning property is poor, and in the case of 5 mm or more, absorption or scattering of the laser beam is caused by the cushion layer, and the energy of the laser beam reaching the contact interface between the end portion 1aa and the tip portion 1ba is reduced. There is a risk of lowering.
The cushion layer preferably has a light transmittance of 30% or more with respect to the laser light wavelength to be used, and more preferably 50% or more.
In addition, a cushion layer similar to the cushion layer can be disposed on the upper surface of the stage 26.

本実施形態のレーザー光照射部２７においては、重ね合わせた新旧原反フィルム１ａ、１ｂの重ね合わせ部分に沿ってレーザー溶着を実施して、ライン状の溶着部たる接合部を形成させ得るように構成されていることが好ましく、例えば、集光レンズによって所望のビームサイズに集光されたスポットビームを重ね合わせ部分に沿って走査させるための機構や、シリンドリカルレンズや回折光学素子といった光学部材の使用によってライン状のレーザービームを整形して原反フィルムの重ね合わせ部分に照射する機構、更には複数のレーザー光源を重ね合わせ部分に沿って配置し、無走査で同時照射することで一括溶融加熱接合する機構などが備えられていることが好ましい。   In the laser beam irradiation unit 27 of the present embodiment, laser welding is performed along the overlapping portions of the overlapped old and new original films 1a and 1b so that a joint portion that is a line-shaped welding portion can be formed. Preferably, for example, a mechanism for scanning a spot beam condensed to a desired beam size by a condensing lens along the overlapping portion, or use of an optical member such as a cylindrical lens or a diffractive optical element A linear laser beam is shaped by a mechanism to irradiate the overlapping part of the original film, and a plurality of laser light sources are arranged along the overlapping part, and simultaneous irradiation without scanning is performed at the same time by fusion melting and heating It is preferable that a mechanism or the like is provided.

また、上記した塗布部２９は、第２の保持部２５に保持された新原反フィルム１ｂの先端部１ｂａにおいてステージ２６に載置された部分の上面に、光吸収剤を塗布するようになっている。かかる光吸収剤の塗布により、末端部１ａａと先端部１ｂａとの界面部におけるレーザー光の光吸収性を高め、より効率良く溶着を実施させることができる。   In addition, the above-described application unit 29 applies a light absorber to the upper surface of the portion placed on the stage 26 at the tip portion 1ba of the new raw film 1b held by the second holding unit 25. Yes. By applying such a light absorbent, the light absorption of the laser light at the interface between the end portion 1aa and the tip portion 1ba can be increased, and welding can be performed more efficiently.

ここで使用する光吸収剤としては、レーザー光を吸収して熱を発生させるものであれば特に限定がされず、カーボンブラック、顔料、染料などを用いることが出来る。
例えば、フタロシアニン系吸収剤、ナフタロシアニン系吸収剤、ポリメチン系吸収剤、ジフェニルメタン系吸収剤、トリフェニルメタン系吸収剤、キノン系吸収剤、アゾ系吸収剤、ジインモニウム塩などを用いることが出来る。
また、８００ｎｍ〜１２００ｎｍの波長を有するレーザー光を発するレーザー光源を用いる場合には、例えば、米国Ｇｅｎｔｅｘ社製から商品名「Ｃｌｅａｒｗｅｌｄ」として市販の光吸収剤を用いることが出来る。 The light absorber used here is not particularly limited as long as it absorbs laser light and generates heat, and carbon black, pigments, dyes, and the like can be used.
For example, a phthalocyanine absorbent, a naphthalocyanine absorbent, a polymethine absorbent, a diphenylmethane absorbent, a triphenylmethane absorbent, a quinone absorbent, an azo absorbent, a diimmonium salt, or the like can be used.
Moreover, when using the laser light source which emits the laser beam which has a wavelength of 800 nm-1200 nm, a commercial light absorber can be used as a trade name "Clearweld" from the US Gentex company, for example.

これらの吸収剤は有機溶媒などで希釈して、塗布部２９で塗布させることができ、該塗布部２９としては、例えば、ディスペンサー、インクジェットプリンター、スクリーン印刷機、２流体式、１流体式又は超音波式スプレー、スタンパー、コーターなどの一般的な塗布装置を採用することができる。   These absorbents can be diluted with an organic solvent or the like and applied by the application unit 29. Examples of the application unit 29 include a dispenser, an ink jet printer, a screen printer, a two-fluid type, a one-fluid type, or a super-type. A general coating apparatus such as a sonic spray, a stamper, or a coater can be employed.

配置調整部３１は、第１の保持部２２に保持された旧原反フィルム１ａの末端部１ａａと、第２の保持部２５に保持され光吸収剤が塗布された新原反フィルム１ｂの先端部１ｂａと、がステージ２６上で光吸収剤を挟んで重ね合わさるように新旧原反フィルム１ａ、１ｂの配置を調整するためのものであり、ここでは、第２の保持部２５及びステージ２６を、第２の保持部２５がステージ２６を挟んで第１の保持部２２と隣接する位置に向かって移動するように構成されている。また、図１の破線で示す部分が第１の保持部と共に移動するように構成されている。なお、本発明においては、上記末端部１ａａ及び先端部１ｂａを重ね合わせ可能に構成されていれば、第１の保持部２２のみが移動するように構成されていてもよく、第１の保持部２２と第２の保持部２５及びステージ２６との両方が移動するように構成されていてもよい。   The arrangement adjusting unit 31 includes an end 1aa of the old original film 1a held by the first holding unit 22 and a front end of the new original film 1b held by the second holding unit 25 and coated with a light absorber. 1ba is for adjusting the arrangement of the old and new original film 1a, 1b so that the light absorber is sandwiched on the stage 26. Here, the second holding unit 25 and the stage 26 are The second holding unit 25 is configured to move toward a position adjacent to the first holding unit 22 with the stage 26 interposed therebetween. Moreover, the part shown with the broken line of FIG. 1 is comprised so that it may move with a 1st holding | maintenance part. In the present invention, as long as the end portion 1aa and the tip portion 1ba are configured to be superposed, only the first holding portion 22 may be configured to move. 22 and the second holding unit 25 and the stage 26 may both be configured to move.

アキュムレータ３２は、上流側から搬入される旧原反フィルム１ａを蓄積し且つ蓄積した旧原反フィルム１ａを下流側に搬出することにより、旧原反フィルム１ａの搬入速度と搬出速度とを異ならしめるように構成されており、上流側において旧原反フィルム１ａの搬送が停止しても、後段の処理工程（処理装置）への旧原反フィルム１ａの搬送を継続し得るように、旧原反フィルム１ａを蓄積できるようになっている。かかるアキュムレータ３２は、図１に示すように第１の保持部２２の下流側（図１の左側）に配置されており、図２に示すように旧原反フィルム１ａが架け渡される第１ローラ３３、第２ローラ３４、第３ローラ３５、第４ローラ３６及び第５ローラ３７を有している。   The accumulator 32 accumulates the old original film 1a carried in from the upstream side, and carries out the accumulated old original film 1a to the downstream side, thereby making the carry-in speed and the carry-out speed of the old original film 1a different. Even if the conveyance of the old original film 1a is stopped on the upstream side, the old original film 1a can be continuously conveyed to the subsequent processing step (processing apparatus). The film 1a can be stored. The accumulator 32 is disposed on the downstream side (left side in FIG. 1) of the first holding portion 22 as shown in FIG. 1, and the first roller on which the old original film 1a is bridged as shown in FIG. 33, a second roller 34, a third roller 35, a fourth roller 36, and a fifth roller 37.

これらローラのうち、第１ローラ３３、第２ローラ３４及び第３ローラ３５は固定配置されている。また、第４ローラ３６は、第１ローラ３３及び第２ローラ３４の間の下方において、上下方向に移動可能に配置され、第５ローラ３７は、第２ローラ３４及び第３ローラ３５の間の下方において、上下方向に移動可能に配置されている。   Among these rollers, the first roller 33, the second roller 34, and the third roller 35 are fixedly arranged. The fourth roller 36 is arranged to be movable in the vertical direction below the first roller 33 and the second roller 34, and the fifth roller 37 is arranged between the second roller 34 and the third roller 35. Below, it is arranged to be movable in the vertical direction.

かかる第４及び第５ローラ３６、３７は、最下方のホームポジションに配置され、これにより、旧原反フィルム１ａはアキュムレータ３２に蓄積されるようになっている。そして、図２に示すように、アキュムレータ３２の上流側において旧原反フィルム１ａの搬送が停止すると、かかる停止に合わせて第４及び第５ローラ３６、３７は上方に移動し、後段の処理工程への旧原反フィルム１ａの搬送を継続し得るようになっている。また、後述するように旧原反フィルム１ａと新原反フィルム１ｂとが接合され、旧原反フィルム１ａに続いて新原反フィルム１ｂが搬送されると、第４及び第５ローラ３６、３７がホームポジションへと下方に移動し、旧原反フィルム１ａに続いて新原反フィルム１ｂがアキュムレータ３２に蓄積されるようになっている。   The fourth and fifth rollers 36 and 37 are disposed at the lowermost home position, whereby the old original film 1a is accumulated in the accumulator 32. Then, as shown in FIG. 2, when the conveyance of the old original film 1a is stopped on the upstream side of the accumulator 32, the fourth and fifth rollers 36 and 37 move upward in accordance with the stop, and a subsequent processing step. The conveyance of the old original film 1a can be continued. Further, as will be described later, when the old original film 1a and the new original film 1b are joined and the new original film 1b is conveyed following the old original film 1a, the fourth and fifth rollers 36 and 37 are brought home. It moves downward to the position, and the new original film 1b is accumulated in the accumulator 32 following the old original film 1a.

また、第４及び第５ローラ３６、３７の上方への移動速度及び移動距離は、上記した旧原反フィルム１ａの搬送停止から、新旧原反フィルム１ａ、１ｂの接合後、新旧原反フィルム１ａ、１ｂの搬送が開始されるまでの間、旧原反フィルム１ａが後段の処理工程に搬送されるような速度及び距離に応じて設定されている。また、第４及び第５ローラ３６、３７の下方への移動速度は、後段の処理工程への新旧原反フィルム１ａ、１ｂの搬送を妨げないような速度に設定されている。   The upward moving speed and the moving distance of the fourth and fifth rollers 36 and 37 are the same as the old and new original films 1a and 1b after the old and old original films 1a and 1b are joined. Until the conveyance of 1b is started, it is set according to the speed and distance at which the old original film 1a is conveyed to the subsequent processing step. The downward moving speed of the fourth and fifth rollers 36 and 37 is set to a speed that does not hinder the conveyance of the old and new original films 1a and 1b to the subsequent processing step.

なお、アキュムレータ３２に設けられるローラの数量や配置等は、後段の処理工程への旧原反フィルム１ａの上記搬送の継続が可能であれば特に限定されるものではない。また、ここでは、第１ローラ３３の上流側（図２の右側）に、旧原反フィルム１ａの搬送をガイドするローラ対３８が配置されているが、かかるローラ対３８を設けない構成とすることも、必要に応じて複数のローラ対を設ける構成とすることもできる。   Note that the number, arrangement, and the like of the rollers provided in the accumulator 32 are not particularly limited as long as the above-described conveyance of the old original film 1a to the subsequent processing step can be continued. Further, here, a roller pair 38 for guiding the conveyance of the old original film 1a is arranged on the upstream side (the right side in FIG. 2) of the first roller 33, but such a roller pair 38 is not provided. Alternatively, a plurality of roller pairs may be provided as necessary.

次に、上記した接合装置１００によるシート接合体の製造方法について説明する。   Next, a method for manufacturing a sheet bonded body using the bonding apparatus 100 described above will be described.

旧原反フィルム１ａが、第１の送り出し部２１から送り出され、アキュムレータ３２を通過しつつ、後段の処理工程へと搬送されており、この状態で、旧原反フィルム１ａと新原反フィルム１ｂとを接合することとする。まず、第２の送り出し部２４から第２の保持部２５に向かって新原反フィルム１ｂが送り出される。送り出された新原反フィルム１ｂの先端部１ｂａが第２の保持部２５及びステージ２６の上方に配置されると、新原反フィルム１ｂの送り出しが停止し、かかる停止に合わせて上記第２の吸引部材が作動して、図３に示すように、先端部１ｂａが第２の保持部２５に保持される（第１の工程）。また、図４に示すように、ステージ２６上の先端部１ｂａの上面に、塗布部２９（図１参照）により光吸収剤が塗布される（第２の工程）。   The old original film 1a is sent out from the first sending-out part 21 and is conveyed to the subsequent processing step while passing through the accumulator 32. In this state, the old original film 1a and the new original film 1b Are to be joined. First, the new raw film 1b is sent out from the second sending-out part 24 toward the second holding part 25. When the leading end 1ba of the fed new original film 1b is arranged above the second holding part 25 and the stage 26, the feeding of the new original film 1b is stopped, and the second suction member is adjusted in accordance with the stop. As shown in FIG. 3, the leading end 1ba is held by the second holding portion 25 (first step). Also, as shown in FIG. 4, a light absorber is applied to the upper surface of the tip portion 1ba on the stage 26 by the application unit 29 (see FIG. 1) (second step).

次に、図５に示すように、アキュムレータ３２の上流側において旧原反フィルム１ａの送り出しが停止し、かかる停止に合わせて、前述した図２に示すように第４及び第５ローラ３６、３７が上方に移動して後段の処理工程への旧原反フィルム１ａの搬送を継続しつつ、図６に示すように、上記第１の吸引部材が作動して旧原反フィルム１ａが第１の保持部２２に保持される（第３の工程）。   Next, as shown in FIG. 5, the feeding of the old original film 1a stops on the upstream side of the accumulator 32, and in accordance with the stop, the fourth and fifth rollers 36, 37 as shown in FIG. As shown in FIG. 6, the first suction member is operated and the old original film 1a is moved to the first position while continuing to convey the old original film 1a to the subsequent processing step. It hold | maintains at the holding | maintenance part 22 (3rd process).

また、図６に示すように、第１の保持部２２に保持された旧原反フィルム１ａは切断部２３により、旧原反フィルム１ａにおける第１の保持部２２に保持された部分の上流側（図６の右側）において新原反フィルム１ｂの先端部１ｂａと重なり合う部分を残して切断され、かかる切断により、旧原反フィルム１ａは、処理工程に搬送されて処理される旧原反フィルム１ａの末端部１ａａと、処理されない不要部とが形成される（第４の工程）。   Further, as shown in FIG. 6, the old original film 1a held by the first holding unit 22 is upstream of the portion held by the first holding unit 22 in the old original film 1a by the cutting unit 23. (The right side of FIG. 6) is cut while leaving a portion overlapping with the tip 1ba of the new original film 1b, and by this cutting, the old original film 1a is transported to the processing step and processed. End part 1aa and an unnecessary part which is not processed are formed (the 4th process).

かかる切断後、第１の送り出し部２１が逆方向に回転し、旧原反フィルム１ａにおける上記不要部が巻き取られて回収される（第８の工程）。   After the cutting, the first delivery portion 21 rotates in the reverse direction, and the unnecessary portion of the old original film 1a is wound and collected (eighth step).

上記切断後、図７に示すように、配置調整部３１（図１参照）により、新原反フィルム１ｂの先端部１ｂａが保持された第２の保持部２５及びステージ２６が移動して、これらが、ステージ２６を挟んで第２の保持部２５が第１の保持部２２と隣接する位置に配置され、ステージ２６上において末端部１ａａと先端部１ｂａとが光吸収剤を挟んで重ね合わせられる（第５の工程）。   After the cutting, as shown in FIG. 7, the arrangement adjusting unit 31 (see FIG. 1) moves the second holding unit 25 and the stage 26 holding the leading end 1ba of the new raw film 1b, and these are moved. The second holding portion 25 is disposed adjacent to the first holding portion 22 with the stage 26 interposed therebetween, and the end portion 1aa and the tip portion 1ba are superimposed on the stage 26 with the light absorber interposed therebetween ( Fifth step).

次に、図８に示すように、ステージ２６上で重ね合わされた末端部１ａａと先端部１ｂａが、加圧部２８によって上方からステージ２６に対して加圧され、図９に示すように、レーザー光照射部２７（図１参照）によってレーザー光Ｒが、末端部１ａａと先端部１ｂａとの重ね合わせ部分に対して加圧部２８の上方から照射されて、末端部１ａａと先端部１ｂａとがレーザー溶着により接合される（第６の工程）。   Next, as shown in FIG. 8, the end portion 1aa and the tip portion 1ba superimposed on the stage 26 are pressurized against the stage 26 from above by the pressurizing unit 28, and as shown in FIG. Laser light R is irradiated from above the pressurizing unit 28 onto the overlapping portion of the end portion 1aa and the tip portion 1ba by the light irradiation unit 27 (see FIG. 1), and the end portion 1aa and the tip portion 1ba are separated from each other. Joining is performed by laser welding (sixth step).

そして、かかるレーザー溶着後、図１０に示すように、加圧部２８が上昇し、該加圧部２８による末端部１ａａ及び先端部１ｂａの加圧が解除され、上記した第１及び第２吸引部材の作動が停止して、第１及び第２の保持部２２、２５による末端部１ａａ及び先端部１ｂａの保持が解除され、図１１に示すように、旧原反フィルム１ａに続いて新原反フィルム１ｂが搬送される（第７の工程）。このとき、配置可変部４１（図１参照）によって、旧原反フィルム１ａと新原反フィルム１ｂとの配置が入れ替えられる。また、新旧原反フィルム１ａ、１ｂの搬送開始に合わせて、第４及び第５ローラ３６、３７（図１参照）が下方に移動して、旧原反フィルム１ａに続いて新原反フィルム１ｂがアキュムレータ３２に蓄積される。   Then, after the laser welding, as shown in FIG. 10, the pressurizing part 28 is raised, the pressurization of the end part 1aa and the tip part 1ba by the pressurizing part 28 is released, and the first and second suction described above are performed. The operation of the member is stopped, and the holding of the end portion 1aa and the front end portion 1ba by the first and second holding portions 22 and 25 is released, and as shown in FIG. The film 1b is conveyed (seventh step). At this time, the arrangement of the old original film 1a and the new original film 1b is switched by the arrangement variable unit 41 (see FIG. 1). In addition, the fourth and fifth rollers 36 and 37 (see FIG. 1) move downward in accordance with the start of conveyance of the new and old original films 1a and 1b, and the new original film 1b follows the old original film 1a. Accumulated in the accumulator 32.

上記したように、旧原反フィルム１ａの末端部１ａａと新原反フィルム１ｂの先端部１ｂａとが接合されてシート接合体が作製されることにより、両フィルムの接合に際して後段の処理工程への旧原反フィルム１ａの搬送が停止することを回避できる。そして、旧原反フィルム１ａに引き続いて新原反フィルム１ｂが連続して搬送されて、処理される。また、このように新旧原反フィルム１ａ、１ｂの接合を繰り返すことによって、２つ以上の原反フィルム１を順次連続して接合し、後段の処理工程に搬送することができる。   As described above, the end part 1aa of the old original film 1a and the front end part 1ba of the new original film 1b are joined together to produce a sheet joined body, so that the old process to the subsequent processing step can be performed when joining both films. It is possible to avoid the conveyance of the original film 1a being stopped. Then, following the old original film 1a, the new original film 1b is continuously conveyed and processed. In addition, by repeating the joining of the old and new original films 1a and 1b as described above, two or more original films 1 can be successively joined and conveyed to a subsequent processing step.

なお、配置可変部４１（図１参照）によって下方に移動した旧原反フィルム１ａを取り外し、新原反フィルム１ｂの次の原反フィルムを装着することによって、順次連続して原反フィルムを接合することができる。   In addition, by removing the old original film 1a moved downward by the arrangement variable unit 41 (see FIG. 1) and attaching the original film next to the new original film 1b, the original films are sequentially joined. be able to.

なお、ここでは詳述しないが、上記した接合装置１００には、一般的なレーザー溶着装置ならびにその周辺機器において利用されている種々の機構を採用することができる。また、上記実施形態では、旧原反フィルム１ａを切断した後、旧原反フィルム１ａと新原反フィルム１ｂとを接合したが、その他例えば、図１２に示すように旧原反フィルム１ａと、新原反フィルム１ｂの先端部の一部と、を重ね合わせて切断した後、かかる切断によって形成された旧原反フィルム１ａの後端部１ａａと新原反フィルム１ｂａの先端部とを接合することもできる。   Although not described in detail here, the above-described bonding apparatus 100 can employ various mechanisms that are used in general laser welding apparatuses and peripheral devices. In the above embodiment, the old original film 1a and the new original film 1b are joined after the old original film 1a is cut. However, for example, as shown in FIG. 12, the old original film 1a and the new original film 1a are joined. After a part of the front end portion of the anti-film 1b is overlapped and cut, the rear end portion 1aa of the old original film 1a formed by the cutting and the front end portion of the new original film 1ba can be joined. .

具体的には、旧原反フィルム１ａの搬送中に新原反フィルム１ｂを送り出してその先端部の長手方向における一部を第２の保持部２５で保持し、先端部の上面に光吸収剤を塗布する（図１２（ａ））。また、旧原反フィルム１ａの送り出しを停止すると共にアキュムレータ３２を作動させ（図２参照）、旧原反フィルム１ａを新原反フィルム１ｂの上方から重ね合わせるようにして第１の保持部２２で保持する（図１２（ｂ））。次に、切断部２３の受け部２３ｂを上昇させ、切断部２３によって新旧原反フィルム１ａ、１ｂを切断することにより（図１２（ｃ））、旧原反フィルム１ａの末端部１ａａと新原反フィルム１ｂの先端部１ｂａを形成する。   Specifically, the new original film 1b is sent out while the old original film 1a is being conveyed, and a part of the front end portion in the longitudinal direction is held by the second holding unit 25, and a light absorber is applied to the upper surface of the front end portion. Apply (FIG. 12A). Further, the feeding of the old original film 1a is stopped and the accumulator 32 is operated (see FIG. 2), and the old original film 1a is held by the first holding unit 22 so as to overlap from above the new original film 1b. (FIG. 12B). Next, by raising the receiving part 23b of the cutting part 23 and cutting the old and new original film 1a and 1b by the cutting part 23 (FIG. 12C), the end part 1aa and the new original film of the old original film 1a are cut. The leading end 1ba of the film 1b is formed.

また、切断によって発生した両フィルムの不要部を回収すると共に、受け部２３ｂを下降させる（図１２（ｄ））。そして、配置調整部３１（図１２では図示せず）により第２の保持部２５を第１の保持部２２に接近させることにより（図１２（ｅ））、新原反フィルム１ｂの先端部１ｂａにおいて光吸収剤が塗布された上面に旧原反フィルム１ａの末端部１ａａを重ね合わせた後、ステージ２６を上昇させると共に加圧部２８を下降させ（図１２（ｆ））、加圧部２８によって末端部１ａａと先端部１ｂａとの重ね合わせ部分をステージ２６に押圧しながら該重ね合わせ部分にレーザー光を照射して、末端部１ａａと先端部１ｂａとを接合する。その後、前述した図１０及び図１１に示すように、末端部１ａａ及び先端部の加圧及び保持を解除することにより、旧原反フィルム１ａに引き続いて新原反フィルム１ｂを搬送させることができる。   Further, unnecessary portions of both films generated by the cutting are collected and the receiving portion 23b is lowered (FIG. 12D). And by making the 2nd holding | maintenance part 25 approach the 1st holding | maintenance part 22 by arrangement | positioning adjustment part 31 (not shown in FIG. 12) (FIG.12 (e)), in the front-end | tip part 1ba of a new original fabric film 1b After the end portion 1aa of the old film 1a is superposed on the upper surface coated with the light absorber, the stage 26 is raised and the pressure unit 28 is lowered (FIG. 12 (f)). While pressing the overlapping portion of the end portion 1aa and the tip portion 1ba against the stage 26, the overlapping portion is irradiated with laser light to join the end portion 1aa and the tip portion 1ba. Then, as shown in FIG. 10 and FIG. 11 described above, by releasing the pressurization and holding of the end portion 1aa and the tip portion, the new original film 1b can be conveyed following the old original film 1a.

また、上記接合装置１００によって作製されたシート接合体（旧原反フィルム１ａ及び新原反フィルム１ｂ）が搬送される後段の処理工程としては、薬液処理や延伸処理等を挙げることができる。また、例えば原反フィルム１として、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルムを用いた場合、図１３に示すような延伸装置（処理装置）５０を用いた延伸処理工程を挙げることができる。尚、図１３においては、レーザー溶着によって接合された部分（溶着部）を黒塗り部３０で示している。   Moreover, a chemical | medical solution process, an extending | stretching process, etc. can be mentioned as a post process process in which the sheet | seat joined body (old original film 1a and new original film 1b) produced with the said joining apparatus 100 is conveyed. For example, when the polyvinyl alcohol-type resin film for producing a polarizing film is used as the raw film 1, the extending | stretching process process using the extending | stretching apparatus (processing apparatus) 50 as shown in FIG. 13 can be mentioned. . In FIG. 13, a portion (welded portion) joined by laser welding is indicated by a black coating portion 30.

図１３に示すように、偏光フィルムを製造するための延伸装置５０には、接合装置１００から搬送された旧原反フィルム１ａ及び新原反フィルム１ｂ（原反フィルム１）を所定の薬液に浸漬するための複数の浸漬浴４と、該浸漬浴４内に原反フィルム１を通すように、原反フィルム１の移動経路を規制する複数のローラ９と、該移動経路中にて原反フィルム１を延伸する延伸手段と、複数の浸漬浴４に浸漬され且つ延伸されたフィルムを偏光フィルムとしてロール状に巻き取る偏光フィルム巻取部１０とが備えられている。   As shown in FIG. 13, in the stretching apparatus 50 for manufacturing a polarizing film, the old original film 1a and the new original film 1b (original film 1) conveyed from the joining apparatus 100 are immersed in a predetermined chemical solution. A plurality of immersion baths 4, a plurality of rollers 9 for restricting the movement path of the original film 1 so that the original film 1 is passed through the immersion bath 4, and the original film 1 in the movement path. And a polarizing film take-up unit 10 that winds the stretched film immersed in the plurality of immersion baths 4 into a roll shape as a polarizing film.

また、浸漬浴４の下流側で且つ巻取部１０の上流側には、フィルムに付着した洗浄液を乾燥させる乾燥装置１１、具体的には乾燥オーブンが備えられている。更に、ロール状に巻回された表面保護フィルム（例えば、トリアセチルセルロースフィルムやシクロオレフィンポリマーフィルム）等の積層用フィルム１２が前記乾燥装置１１で乾燥されたフィルムの両面側にそれぞれ配されており、乾燥後のフィルムの両面に積層用フィルム１２を積層させるためのラミネート装置が備えられている。   Further, on the downstream side of the immersion bath 4 and the upstream side of the winding unit 10, a drying device 11 for drying the cleaning liquid attached to the film, specifically, a drying oven is provided. Furthermore, the film 12 for lamination | stacking, such as a surface protection film (for example, a triacetyl cellulose film and a cycloolefin polymer film) wound by roll shape, is distribute | arranged to the both surfaces of the film dried with the said drying apparatus 11, respectively. A laminating device for laminating the laminating film 12 on both sides of the dried film is provided.

かかる延伸装置５０により、原反フィルム１の累積した総延伸倍率が２〜８倍となるようにその長さ方向に延伸するようになっており、好ましくは５．２５〜８倍となるようにその長さ方向に延伸することによって、得られた偏光フィルムに優れた偏光機能を付与することができる。   With such a stretching device 50, the film is stretched in the length direction so that the accumulated total stretching ratio of the raw film 1 is 2 to 8 times, preferably 5.25 to 8 times. By stretching in the length direction, an excellent polarizing function can be imparted to the obtained polarizing film.

本実施形態のシート接合体の製造方法及びシート接合体の製造装置は、以上の通りであるが、本発明は本実施形態に限定されず本発明の意図する範囲内において適宜設計変更可能である。   The sheet joined body manufacturing method and sheet joined body manufacturing apparatus of the present embodiment are as described above, but the present invention is not limited to the present embodiment, and the design can be changed as appropriate within the intended scope of the present invention. .

次に実施例を挙げて本発明を更に詳しく説明するが、本発明はこれらに限定されるものではない。   EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these.

（参考例１）
下記の樹脂シート部材、条件を使用した。
・原反フィルム：トリアセチルセルロース樹脂（ＴＡＣ）フィルム（（株）富士フィルム社製、厚み８０μｍ、巾１，３３０ｍｍ）
・重ね合わせ幅：１．５ｍｍ巾
・加熱溶融接合手段：レーザー
・レーザー：半導体レーザー（波長９４０ｎｍ、パワー８０Ｗ、スポット径２ｍｍφ、
パワー密度２，５４７Ｗ／ｃｍ2、走査速度７０ｍｍ／ｓｅｃ、積算照射量 １０２Ｊ／ｃｍ2、トップハットビーム）
・光吸収剤：商品名「Ｃｌｅａｒｗｅｌｄ ＬＤ１２０Ｃ」（米国ジェンテックス社製、
波長９４０ｎｍの光の吸収率３０％、溶媒アセトン）、下側に配した新原反 フィルムの上面に５．０ｍｍ巾で１０ｎＬ／ｍｍ2塗布
・加圧部材：溶融石英ガラスの平板（１５ｍｍ厚）
・加圧条件：原反フィルム重ね合わせ部へ加重５０ｋｇｆ／ｃｍ2で押し付け
( Reference Example 1)
The following resin sheet members and conditions were used.
Raw film: Triacetyl cellulose resin (TAC) film (Fuji Film Co., Ltd., thickness 80 μm, width 1,330 mm)
-Overlap width: 1.5 mm width-Heat fusion bonding means: Laser-Laser: Semiconductor laser (wavelength 940 nm, power 80 W, spot diameter 2 mmφ,
(Power density 2,547 W / cm 2 , scanning speed 70 mm / sec, integrated dose 102 J / cm 2 , top hat beam)
-Light absorber: Trade name "Clearweld LD120C" (manufactured by Gentex, USA)
Absorbing 30% of light of wavelength 940 nm, solvent acetone), lower the disposed was NIIHARA fabric film upper surface 10 nL / mm 2 applied and pressure member at a 5.0mm width of: a flat plate of fused quartz glass (15 mm thick)
・ Pressurizing condition: Pressed against the original film overlap part with a load of 50kgf / cm 2

上記した旧ＴＡＣフィルムを、搬送速度３０ｍ／分、張力３００Ｎで搬送し、延伸装置のケン化浴槽に搬送した。かかる旧ＴＡＣフィルムの搬送中において、上記各条件を用いて前述した図３〜１１に示すように旧ＴＡＣフィルムと新ＴＡＣフィルムとを接合し、旧ＴＡＣフィルムに続いて新ＴＡＣフィルムをケン化浴槽に搬送させてこれを通過させた。
その結果、アキュムレータ３２の上流側で旧ＴＣＡフィルムの搬送を停止し、新旧ＴＡＣフィルムを接合している間、旧ＴＡＣフィルムのケン化浴槽への搬送は良好であり、接合後、新旧ＴＣＡフィルムの搬送を開始した後においても、新旧ＴＡＣフィルムのケン化浴槽への搬送は良好であった。また、ケン化浴槽の通過後、旧ＴＡＣフィルムと新ＴＡＣフィルムとの間に破断は認められず、その接合性は良好であった。 The above-mentioned old TAC film was conveyed at a conveyance speed of 30 m / min and a tension of 300 N and conveyed to a saponification bath of a stretching apparatus. While the old TAC film is being transported, the old TAC film and the new TAC film are joined using the above-mentioned conditions as shown in FIGS. 3 to 11, and the new TAC film is saponified after the old TAC film. And let it pass.
As a result, the transportation of the old TCA film is stopped on the upstream side of the accumulator 32, and the old TAC film is transported to the saponification bath while the old and new TAC films are joined. Even after the conveyance was started, the conveyance of the old and new TAC films to the saponification bath was good. In addition, no break was observed between the old TAC film and the new TAC film after passing through the saponification bath, and the bondability was good.

（実施例２）
新旧の樹脂シート部材として、ポリビニルアルコール樹脂（ＰＶＡ）フィルム（（株）クラレ社製、厚み７５μｍ、巾３，０００ｍｍ）を用い、図１３に示すような延伸装置において延伸倍率が、膨潤浴では２．６倍、染色浴では３．４倍、架橋浴では３．６倍、延伸浴では６．０倍となるように延伸した後、洗浄浴を通過させたこと以外は実施例１と同様にして、旧ＰＶＡフィルムと新ＰＶＡフィルムとを接合し、旧ＰＶＡフィルムに引き続いて新ＰＶＡフィルムを延伸させた。
その結果、新旧ＰＶＡフィルムを接合している間、旧ＰＶＡフィルムの延伸装置への搬送は良好であり、接合後、新旧ＰＶＡフィルムの搬送を開始した後においても、新旧ＰＶＡフィルムの延伸装置への搬送は良好であった。また、延伸装置において各薬液槽を通過して延伸された後、旧ＰＶＡフィルムと新ＰＶＡフィルムとの間に破断は認められず、その接合性は良好であった。さらに、延伸倍率６．０倍の延伸においても破断は認められず、延伸性も良好であった。 (Example 2)
As an old and new resin sheet member, a polyvinyl alcohol resin (PVA) film (manufactured by Kuraray Co., Ltd., thickness: 75 μm, width: 3,000 mm) is used. In a stretching apparatus as shown in FIG. Except that the film was stretched to be 6 times, 3.4 times for the dyeing bath, 3.6 times for the crosslinking bath, and 6.0 times for the stretching bath, and then passed through a washing bath. Then, the old PVA film and the new PVA film were joined, and the new PVA film was stretched following the old PVA film.
As a result, while the old and new PVA films are joined, the transport of the old PVA film to the stretching device is good, and after joining, the transport of the old and new PVA films is started. The conveyance was good. Moreover, after extending | stretching through each chemical | medical solution tank in an extending | stretching apparatus, a fracture | rupture was not recognized between the old PVA film and the new PVA film, and the bondability was favorable. Furthermore, no break was observed even at a draw ratio of 6.0, and the drawability was good.

（比較例１）
接合手段として感圧型接着剤（アクリル系粘着剤；日東電工製、Ｎｏ．５０００ＮＳ １６０μｍ厚）を用い、該アクリル系粘着剤を新ＰＶＡフィルムの先端部の上面に貼付して、かかる先端部と旧ＰＶＡフィルムの末端部とを接合したこと以外は実施例２と同様にして、新旧ＰＶＡフィルムを延伸させた。
その結果、新旧ＰＶＡフィルムを接合している間、旧ＰＶＡフィルムの延伸装置への搬送は良好であり、接合後、新旧ＰＶＡフィルムの搬送を開始した後においても、新旧ＰＶＡフィルムの延伸装置への搬送は良好であった。しかし、延伸浴槽において、旧ＰＶＡフィルムと新ＰＶＡフィルムとの間に破断は認められた。 (Comparative Example 1)
A pressure-sensitive adhesive (acrylic pressure-sensitive adhesive; manufactured by Nitto Denko, No. 5000NS 160 μm thick) is used as a joining means, and the acrylic pressure-sensitive adhesive is pasted on the upper surface of the front end of the new PVA film. The old and new PVA films were stretched in the same manner as in Example 2 except that the end portions of the PVA film were joined.
As a result, while the old and new PVA films are joined, the transport of the old PVA film to the stretching device is good, and after joining, the transport of the old and new PVA films is started. The conveyance was good. However, in the stretch bath, breakage was observed between the old PVA film and the new PVA film.

（比較例２）
新ＰＶＡフィルムの先端部と旧ＰＶＡフィルムの末端部とをヒートシーラー（ニクロム線３ｍｍ巾、温度２００℃、１０秒）で接合したこと以外は実施例２と同様にして、新旧ＰＶＡフィルムを延伸させた。
その結果、新旧ＰＶＡフィルムを接合している間、旧ＰＶＡフィルムの延伸装置への搬送は良好であり、接合後、新旧ＰＶＡフィルムの搬送を開始した後においても、新旧ＰＶＡフィルムの延伸装置への搬送は良好であった。しかし、延伸倍率４倍の延伸時に、破断が生じたため、偏光フィルムを得るうえで目標とする延伸倍率５．２５倍まで延伸することができなかった。 (Comparative Example 2)
The old and new PVA films are stretched in the same manner as in Example 2 except that the tip of the new PVA film and the end of the old PVA film are joined with a heat sealer (Nichrome wire width 3 mm, temperature 200 ° C., 10 seconds). It was.
As a result, while the old and new PVA films are joined, the transport of the old PVA film to the stretching device is good, and after joining, the transport of the old and new PVA films is started. The conveyance was good. However, since breakage occurred at the time of stretching at a stretch ratio of 4 times, it was not possible to stretch to a target stretch ratio of 5.25 times when obtaining a polarizing film.

１：原反フィルム（樹脂シート部材）、１ａ：旧原反フィルム（第１の樹脂シート部材）、１ａａ：末端部、１ｂ：新原反フィルム（第２の樹脂シート部材）、１ｂａ：先端部、２１：第１の送り出し部（送り出し部）、２２、第１の保持部、２３、切断部、２４：第２の送り出し部、２５：第２の保持部、２６：ステージ、２７：レーザー光照射部、２８：加圧部、２９：塗布部、３１：配置調整部、３２：アキュムレータ（シート蓄積部）、３３：第１ローラ、３４：第２ローラ、３５、第３ローラ、３６：第４ローラ、３７：第５ローラ、１００：接合装置（製造装置） 1: original film (resin sheet member), 1a: old original film (first resin sheet member), 1aa: end part, 1b: new original film (second resin sheet member), 1ba: tip part, 21: 1st sending part (feeding part), 22, 1st holding part, 23, cutting part, 24: 2nd sending part, 25: 2nd holding part, 26: stage, 27: laser light irradiation Part: 28: pressurizing part, 29: application part, 31: arrangement adjusting part, 32: accumulator (sheet accumulating part), 33: first roller, 34: second roller, 35, third roller, 36: fourth Roller, 37: fifth roller, 100: joining device (manufacturing device)

Claims (10)

２以上の帯状の樹脂シート部材のうち先行して処理領域へと搬送される第１の樹脂シート部材と、次の第２の樹脂シート部材とを接合してシート接合体を作製するシート接合体の製造方法であって、
前記第２の樹脂シート部材の先端部を保持する第１の工程と、
該第１の工程で保持された前記先端部に光吸収剤を塗布する第２の工程と、
上流側から搬入される前記第１の樹脂シート部材を蓄積し且つ蓄積した前記第１の樹脂シート部材を下流側に搬出することにより、前記第１の樹脂シート部材の搬入速度と搬出速度とを異ならしめるように構成されたシート蓄積部を介して前記第１の樹脂シート部材を前記処理領域へと搬送し、前記シート蓄積部の下流側では前記第１の樹脂シート部材の搬送を継続しつつ、上流側では前記第１の樹脂シート部材の搬送を停止すると共に前記第１の樹脂シート部材を保持する第３の工程と、
該第３の工程で保持された前記第１の樹脂シート部材を、保持された部分が末端部を構成するように切断する第４の工程と、
前記先端部と前記末端部とを前記光吸収剤を挟んで重ね合わせる第５の工程と、
該第５の工程で重ね合わされた前記先端部及び末端部を加圧しつつレーザー溶着することによって接合する第６の工程と、
前記先端部及び末端部への加圧と、前記先端部及び末端部の保持とを解除して前記第１の樹脂シート部材に続いて前記第２の樹脂シート部材を前記処理領域へと搬送する第７の工程と、
を有し、
前記樹脂シート部材は、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルムであり、
前記処理領域では、前記第１及び第２の樹脂シート部材を、浸漬浴中で長さ方向に５．２５倍以上に延伸し、
前記第５の工程では、重ね合わされた前記先端部及び末端部を、ガラス製部材と、該ガラス製部材よりもクッション性に優れたクッション層とを有する光透過性の加圧部材を用いて加圧しつつレーザー溶着することを特徴とするシート接合体の製造方法。 A sheet joined body for producing a sheet joined body by joining a first resin sheet member that is transported to a processing region in advance among two or more strip-shaped resin sheet members, and the next second resin sheet member. A manufacturing method of
A first step of holding the tip of the second resin sheet member;
A second step of applying a light absorbent to the tip portion held in the first step;
By accumulating the first resin sheet member carried in from the upstream side and carrying out the accumulated first resin sheet member to the downstream side, the carry-in speed and carry-out speed of the first resin sheet member are set. The first resin sheet member is conveyed to the processing region via a sheet accumulation unit configured to be different, and the conveyance of the first resin sheet member is continued on the downstream side of the sheet accumulation unit. A third step of stopping the conveyance of the first resin sheet member and holding the first resin sheet member on the upstream side;
A fourth step of cutting the first resin sheet member held in the third step so that the held portion constitutes a terminal portion;
A fifth step of overlapping the tip portion and the end portion with the light absorber interposed therebetween;
A sixth step of joining by applying laser welding while pressurizing the tip and end overlapped in the fifth step;
Release the pressurization to the tip part and the terminal part and the holding of the tip part and the terminal part, and convey the second resin sheet member to the processing area following the first resin sheet member. A seventh step;
Have
The resin sheet member is a polyvinyl alcohol-based resin film for producing a polarizing film,
In the treatment region, the first and second resin sheet members are stretched by 5.25 times or more in the length direction in an immersion bath,
In the fifth step, the overlapped tip and end portions are added using a light transmissive pressure member having a glass member and a cushion layer having a cushioning property superior to that of the glass member. A method for producing a sheet joined body, which comprises performing laser welding while pressing. 前記第１の樹脂シート部材において前記第４の工程での切断によって生成された不要部を巻き取ることによって、該不要部を回収する第８の工程を有することを特徴とする請求項１に記載のシート接合体の製造方法。   The said 1st resin sheet member has an 8th process of collect | recovering this unnecessary part by winding up the unnecessary part produced | generated by the cutting | disconnection at the said 4th process. Manufacturing method of sheet joined body. 前記樹脂シート部材は、熱可塑性樹脂フィルムの単層であることを特徴とする請求項１または２に記載のシート接合体の製造方法。   The method for producing a sheet joined body according to claim 1, wherein the resin sheet member is a single layer of a thermoplastic resin film. 前記先端部と前記末端部との重ね合わせ幅が０．１ｍｍ以上１０．０ｍｍ未満であることを特徴とする請求項１〜３のいずれかに記載のシート接合体の製造方法。   The method for producing a sheet joined body according to any one of claims 1 to 3, wherein an overlap width between the tip portion and the end portion is 0.1 mm or more and less than 10.0 mm. 前記レーザー光のスポット径が、前記先端部と前記末端部との重ね合わせ幅の半値以上３倍以下であることを特徴とする請求項１〜４のいずれかに記載のシート接合体の製造方法。   5. The method for manufacturing a joined sheet according to claim 1, wherein a spot diameter of the laser light is not less than half and not more than three times as large as an overlap width of the tip portion and the end portion. . ２以上の帯状の樹脂シート部材のうち先行して処理領域へと搬送される第１の樹脂シート部材と、次の第２の樹脂シート部材とを接合してシート接合体を作製するシート接合体の製造装置であって、
前記製造装置は、
上流側から搬入される前記第１の樹脂シート部材を蓄積し且つ蓄積した前記第１の樹脂シート部材を下流側に搬出することにより、前記第１の樹脂シート部材の搬入速度と搬出速度とを異ならしめるように構成されており、下流側においては前記処理領域への前記第１の樹脂シート部材の搬送を継続しつつ、上流側においては前記第１の樹脂シート部材の搬送の停止を可能とするシート蓄積部と、
前記シート蓄積部よりも上流側に配置され、前記第１の樹脂シート部材の搬送停止に合わせて前記第１の樹脂シート部材を保持する第１の保持部と、
前記第１の樹脂シート部材を、前記第１の保持部に保持された部分が末端部を構成するように切断する切断部と、
前記第２の樹脂シート部材の先端部を保持する第２の保持部と、
前記第２の保持部に保持された先端部に光吸収剤を塗布する塗布部と、
前記先端部及び前記末端部の配置を、該先端部及び末端部が前記光吸収剤を挟んで重ね合わせられるように調整する配置調整部と、
前記先端部及び末端部の重ね合わせ部分を加圧する加圧部と、
前記加圧部によって加圧された前記重ね合わせ部分にレーザー光を照射して、前記先端部と前記末端部とをレーザー溶着により接合するレーザー光照射部と、
を備え、且つ、
前記加圧部による前記先端部及び末端部への加圧と、前記先端部及び末端部の保持とを解除することにより前記第１の樹脂シート部材に続いて前記第２の樹脂シート部材が前記処理領域へと搬送されるように構成されており、
前記樹脂シート部材は、偏光フィルムを作製するためのポリビニルアルコール系樹脂フィルムであり、
前記処理領域には、前記第１及び第２の樹脂シート部材が、浸漬浴中で長さ方向に５．２５倍以上に延伸されるように構成された延伸装置が備えられており、
前記加圧部は、前記先端部及び末端部の重ね合わせ部分を加圧する、ガラス製部材と、該ガラス製部材よりもクッション性に優れたクッション層とを有する光透過性の加圧部材を備えることを特徴とするシート接合体の製造装置。 A sheet joined body for producing a sheet joined body by joining a first resin sheet member that is transported to a processing region in advance among two or more strip-shaped resin sheet members, and the next second resin sheet member. Manufacturing equipment,
The manufacturing apparatus includes:
By accumulating the first resin sheet member carried in from the upstream side and carrying out the accumulated first resin sheet member to the downstream side, the carry-in speed and carry-out speed of the first resin sheet member are set. The first resin sheet member can be stopped on the upstream side while continuing to convey the first resin sheet member to the processing region on the downstream side. Sheet storage unit to
A first holding unit that is arranged on the upstream side of the sheet storage unit and holds the first resin sheet member in accordance with the conveyance stop of the first resin sheet member;
A cutting portion for cutting the first resin sheet member so that a portion held by the first holding portion constitutes a terminal portion;
A second holding portion for holding a tip portion of the second resin sheet member;
An application unit for applying a light absorbent to the tip held by the second holding unit;
An arrangement adjusting unit that adjusts the arrangement of the tip and the end so that the tip and the end are overlapped with the light absorber interposed therebetween;
A pressurizing unit that pressurizes the overlapping portion of the tip and end, and
A laser beam irradiation unit that irradiates the overlapped portion pressed by the pressing unit with a laser beam, and joins the tip portion and the end portion by laser welding,
The equipped, and,
The second resin sheet member follows the first resin sheet member by releasing the pressure applied to the tip part and the terminal part by the pressurizing part and the holding of the tip part and the terminal part. Configured to be transported to the processing area,
The resin sheet member is a polyvinyl alcohol-based resin film for producing a polarizing film,
In the treatment region , the first and second resin sheet members are equipped with a stretching device configured to be stretched by 5.25 times or more in the length direction in the immersion bath,
The pressurizing unit includes a light-transmitting pressurizing member having a glass member that pressurizes the overlapping portion of the tip portion and the end portion, and a cushion layer having better cushioning properties than the glass member. An apparatus for producing a sheet joined body, comprising: 前記第１の樹脂シート部材は、該第１の樹脂シート部材を巻き取り可能な送り出し部に装着されており、該送り出し部が、前記第１の樹脂シート部材において前記切断部による切断によって生成された不要部を巻き取ることによって、該不要部を回収するように構成されていることを特徴とする請求項６に記載のシート接合体の製造装置。   The first resin sheet member is attached to a feed-out portion that can wind up the first resin sheet member, and the feed-out portion is generated by cutting the cutting portion in the first resin sheet member. The apparatus for manufacturing a sheet joined body according to claim 6, wherein the unnecessary portion is collected by winding the unnecessary portion. 前記樹脂シート部材は、熱可塑性樹脂フィルムの単層であることを特徴とする請求項６または７に記載のシート接合体の製造装置。   The said resin sheet member is a single layer of a thermoplastic resin film, The manufacturing apparatus of the sheet joined body of Claim 6 or 7 characterized by the above-mentioned. 前記先端部と前記末端部との重ね合わせ幅が０．１ｍｍ以上１０．０ｍｍ未満であることを特徴とする請求項６〜８のいずれかに記載のシート接合体の製造装置。   The apparatus for manufacturing a joined sheet according to any one of claims 6 to 8, wherein the overlap width between the tip portion and the end portion is 0.1 mm or more and less than 10.0 mm. 前記レーザー光のスポット径が、前記先端部と前記末端部との重ね合わせ幅の半値以上３倍以下であることを特徴とする請求項６〜９のいずれかに記載のシート接合体の製造装置。   The apparatus for manufacturing a sheet joined body according to any one of claims 6 to 9, wherein a spot diameter of the laser beam is not less than a half value and not more than three times a superposition width of the tip part and the terminal part. .
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