JP4302042B2 - Film peeling device - Google Patents

Description

  The present invention relates to a film peeling apparatus, and more specifically, for example, when an optical film such as a polarizing plate or a retardation film is attached to a substrate such as a liquid crystal display substrate or a plasma display substrate, the optical film is previously attached to the optical film. The present invention relates to a film peeling apparatus that can quickly peel off a protective film.

  With the widespread use of liquid crystal display devices, the demand for optical films such as polarizing plates and retardation films is increasing. In general, a protective film is bonded to both sides or one side of a polarizing layer having polarizing ability. The film constituting the polarizing plate is provided with an adhesive layer for adhering on the substrate, and a release film for protecting the adhesive layer from foreign matters such as dust is adhered thereon. . The polarizing film to which the peeling film is attached is used for processing as a belt-like film.

  In this case, when laminating the polarizing plate on the substrate, it is necessary to peel the release film from the polarizing plate. As this kind of prior art, the invention “Polarizing method and apparatus for polarizing plate” (JP-A-8-50290, Patent Document 1) and the invention “Film peeling method and apparatus” (JP-A 2000-191203, Patent Document) 2) can be listed.

  In the apparatus of Patent Literature 1, a wedge-shaped guide member is disposed at a predetermined portion of the wound adhesive belt so as to hold the polarizing plate and to apply tension to the belt. In order to ensure smooth rotation of the adhesive belt, a guide roller is rotatably supported on the part. The pressure-sensitive adhesive belt employs a structure in which the pressure-sensitive adhesive surface is directed downward with a guide roller as an axis, and the release film is peeled off from the polarizing plate by rapidly changing the traveling direction.

  On the other hand, the apparatus of Patent Document 2 includes a supply roller, an upper laminating roller, a winding roller, a peeling guide, a lower laminating roller, a cooling pipe, and the like, and the protective film has a predetermined tensile force obtained by the rotational force of the winding roller. Is a peeling force converted into a vector in the peeling direction at the tip of the peeling guide, whereby the peeling force is peeled off from the laminated body and wound around a take-up roller.

JP-A-8-50290 JP 2000-191203 A

  However, in the invention of Patent Document 1, the wedge-shaped guide member is arranged so as to be in sliding contact with the guide roller, the configuration causes dust generation, and the resulting dust generation is applied to the polarizing plate or the substrate. There is a concern that the quality of the product may not be secured due to adhesion.

  Further, in the invention of Patent Document 2, since the peeling guide is formed in a knife edge shape, there is an inconvenience that the front end of the peeling guide comes into sliding contact with the protective film and causes dust generation.

  The present invention has been made to solve the above-mentioned problems, and when peeling a peeling film stuck on an optical film, a small-diameter rotating roller is used to peel off the optical film at a steep angle. It is possible to change the direction of the film and to support the roller with a high-rigidity backup roller to reduce the deflection of the small-diameter rotating roller as much as possible, to peel off at high speed and to prevent dust generation. A film peeling apparatus is provided.

In order to solve the above-mentioned problem, the film peeling apparatus specified in claim 1 of the present application includes a belt-shaped film sending unit that feeds a belt-like film having a peeling film stuck on an optical film via a sticking layer; A peeling film separating portion for separating the peeling film from the belt-like film; a first transport system provided between the belt-like film sending portion and the peeling film separating portion for carrying the belt-like film; and the peeling film separation. A separation film collecting unit that collects the separation film separated from the optical film at a portion; and a second film that is provided between the separation film separation unit and the separation film collection unit and conveys the separated separation film. The peeling film separating unit includes a peeling film separating roller and a backup roller that contacts the peeling film separating roller. Seen, together with the peeling film separation roller constitutes a smaller diameter than said backup roller, the backup roller is characterized by comprising a plurality concatenation rollers having the same diameter.

The film peeling apparatus specified in claim 2 of the present application includes a belt-shaped film sending unit that feeds a belt-like film having a peeling film stuck on an optical film via a sticking layer, and the peeling film from the belt-like film. A separation film separating unit to be separated; a first transport system that is provided between the strip film sending unit and the strip film separating unit and transports the strip film; and is separated from the optical film by the strip film separating unit. The peeling film collecting unit for collecting the peeled film, and a second transport system that is provided between the peeling film separating unit and the peeling film collecting unit and transports the separated peeling film. The film separating unit includes a peeling film separating roller, and a backup roller in contact with the peeling film separating roller. The roller is configured to have a smaller diameter than the backup roller, and the backup roller is formed by connecting a plurality of rollers that gradually increase in diameter as the backup roller moves away from the backup roller that contacts the peeling film separation roller. It is characterized by.

The film peeling apparatus specified in claim 3 of the present application includes a belt-shaped film sending unit that feeds a belt-like film having a peeling film stuck on an optical film via a sticking layer, and the peeling film from the belt-like film. A separation film separating unit to be separated; a first transport system that is provided between the strip film sending unit and the strip film separating unit and transports the strip film; and is separated from the optical film by the strip film separating unit. The peeling film collecting unit for collecting the peeled film, and a second transport system that is provided between the peeling film separating unit and the peeling film collecting unit and transports the separated peeling film. The film separating section includes a peeling film separating roller, and a backup roller in contact with the peeling film separating roller. The roller is configured to have a smaller diameter than the backup roller, and the backup roller includes at least a first backup roller in contact with the peeling film separating roller, a second backup roller in contact with the first backup roller, A third backup roller in contact with the second backup roller, and a fourth backup roller in contact with the third backup roller, wherein the second backup roller has a larger diameter than the first backup roller. And the third backup roller has a smaller diameter than the second backup roller, and the fourth backup roller has a larger diameter than the third backup roller .

In this case, the film peeling apparatus according to the present invention is preferably a free roller in which the peeling film separating roller and the backup roller are rotated by a bearing.

  According to the present invention, when separating the peeling film from the optical film, a rotatable small-diameter roller is adopted, and a load applied to the small-diameter roller is supported by the large-diameter backup roller. Therefore, the optical film and the peeling film can be reliably and promptly separated without bending the small-diameter roller, and there is no risk of dust generation.

  The film peeling apparatus according to the present invention will be described in detail below with reference to the accompanying drawings by giving preferred embodiments in relation to the optical film sticking apparatus into which the film peeling apparatus is incorporated.

  FIG. 1 is a front view schematically showing a configuration of an optical film sticking device according to an embodiment of the present invention, and FIG. 2 is a separation film separation incorporated in the optical film sticking device according to an embodiment of the present invention. FIG. 3 is a front view of the peeling roller of FIG. 2, FIG. 4 is an explanatory view of the non-sliding contact state between the roller of the peeling film separating device of FIG. 2 and the second transport system, and FIGS. These are the schematic side surface explanatory drawings of other embodiment of a film peeling apparatus.

  This optical film sticking device 10 is a device for sticking an optical film to a substrate 12, and is a film unwinding portion 14, a first transport system 16, a peeling film winding portion 18, a substrate transporting portion 20, and a substrate position. The determination unit 22 basically includes a film application unit 24, a peeling film separating device 50, and a second transport system 52 provided between the peeling film separating device 50 and the peeling film winding unit 18.

  The substrate 12 is a flat plate member such as a glass substrate or a synthetic resin substrate used for a liquid crystal display substrate, a plasma display substrate, an organic EL substrate, a TFT substrate, a printed substrate, etc. In this case, the configuration of cells, electrodes, etc. in advance You may use the board | substrate with which components were formed.

  The strip-shaped film 26 wound around the film unwinding portion 14 has a peeling film 30 attached to an optical film 28 such as a polarizing plate, a retardation film, an antireflection film, and an interference filter through an adhesive layer (not shown). A belt-like film worn. The optical film 28 may be a composite film in which two or more kinds of optical films, for example, a polarizing plate and a retardation film are bonded together. The belt-like film 26 is, for example, wound around a length of 500 m or more on one roll and having a thickness of 200 to 500 μm.

  The film unwinding unit 14 includes a strip-shaped film unwinding unit 32, an unwinding conveyance system 34 including a pass roller, and a strip-shaped film tension adjusting unit 36.

  The band-shaped film unwinding unit 32 is a unit that takes out the band-shaped film 26 from the unwinding roll 38 around which the band-shaped film 26 is wound, and includes a drive source 40 for rotating the unwinding roll 38.

  The belt-like film tension adjusting unit 36 is a unit having a tension adjusting mechanism that adjusts the tension of the unrolled belt-like film 26 to a predetermined value, and has a dancer roller as the tension adjusting mechanism. The dancer roller is a roller for keeping the tension of the belt-like film 26 fed out from the unwinding roll 38, and is preferably slidably attached using an air pressure unit including an air cylinder.

  The first transport system 16 includes a strip-shaped film delivery roller pair 42, a strip-shaped film cutting unit 44, and a film piece transport unit 46.

  The strip-shaped film cutting unit 44 has a cutting mechanism for cutting the fed strip-shaped film 26 in a direction perpendicular to the longitudinal direction while leaving at least the peeling film 30. As a cutting mechanism, a guillotine cutter, a laser cutter, a round blade rolling cutter, or the like can be used. The strip-shaped film cutting unit 44 is disposed at a predetermined position between the strip-shaped film delivery roller pair 42 and the peeling film separating device 50 in accordance with the length of the cut film piece.

  The film piece transport unit 46 is for the optical film 28 from which the peeling film 30 has been separated to transport the optical film 28 to a position where it is applied to the substrate 12 while sucking the surface opposite to the adhesive surface of the strip-shaped film 26. It includes a suction conveyor (belt conveyor) that sucks the 28 interleaf surfaces onto the belt and conveys it to the film application portion 24 side at a constant angle.

  The peeling film take-up unit 18 is a downstream side of the peeling film separating apparatus 50, a second conveyance system 52 that conveys the peeling film 30 separated from the belt-like film 26, and a roll that winds the conveyed peeling film 30 And a peeling film winding unit 54 including

  The substrate transfer unit 20 includes a first substrate transfer unit 56 and a second substrate transfer unit 58. The first substrate transport unit 56 is a wheel conveyor that transports the substrate 12 supplied from the outside in a horizontal and constant direction, and has a plurality of drive wheels. The second substrate transport unit 58 is a wheel conveyor that transports the substrate 12 on which the optical film 28 cut by the film pasting unit 24 is adhered in a horizontal and constant direction, and has a plurality of drive wheels.

  The substrate positioning unit 22 includes a substrate locking unit 60 and a substrate positioning unit 62. The substrate positioning unit 62 is a unit that determines the position in the traveling direction of the substrate 12 and the direction orthogonal thereto. The substrate positioning unit 62 pushes the substrate 12 on the first substrate transport unit 56 and moves in the traveling direction of the substrate 12 together with the substrate locking unit 60. This is a mechanism for positioning.

  The film pasting unit 24 has a pasting unit 66. The adhering unit 66 has an adhesive surface of the optical film 28 from which the peeling film 30 is separated, and the end surface of the positioned substrate 12 in the advancing direction and the cut surface of the optical film 28 are parallel to each other. The receiving roller 68 and the pressure roller 70 are units to be attached to the corresponding positions. The pressure roller 70 is attached to a lifting mechanism (not shown).

  In this case, in this embodiment, the peeling film separating apparatus 50 is configured as follows. That is, the pair of parallel holding plates 80a and 80b have inclined long holes 82a and 82b, and on the other hand, in the vicinity of the edge of the holding plates 80a and 80b, small holes 84a and 84b and holes 84c that are spaced apart from each other. , 84d. Further, holes 86a and 86b are provided in the vicinity of the tips of the long holes 82a and 82b, respectively. Screw holes 88a, 88b facing the long holes 82a, 82b are provided on the rear end sides of the long holes 82a, 82b. Adjustment bolts 90a and 90b are screwed into the screw holes 88a and 88b.

In this case, a first roller 92 (peeling film separating roller) having a small diameter is bridged in the holes 86a and 86b, and the second to fourth rollers 94 having a larger diameter than the first roller 92 are bridged in the long holes 82a and 82b. Bridge 96, 98 (backup roller) . Then, if the adjustment bolts 90a and 90b to be screwed into the screw holes 88a and 88b are screwed, the tips of the adjustment bolts 90a and 90b are pressed against the shaft of the fourth roller 98, and the third roller 96 and the second roller The roller bodies of the rollers 94 come into contact with each other. Finally, the roller body of the second roller 94 comes into contact with the roller body of the first roller 92. That is, the first roller 92 is backed up by the second roller 94 to the fourth roller 98 in order to avoid the bending thereof. As shown in FIG. 4, none of the second to fourth rollers 94 to 98 is in contact with the second transport system 52. This is to avoid dust generation caused by sliding contact.

  The peeling film separating apparatus 50 configured as described above is attached to the inside of the optical film pasting apparatus 10 by inserting fixing bolts (not shown) into the holes 84a to 84b.

  Next, operation | movement of the optical film sticking apparatus 10 which concerns on one Embodiment of this invention is demonstrated.

  First, the belt-like film 26 is unwound from the unwinding roll 38 through the unwinding conveyance system 34 while adjusting the position in the width direction. Adjustment in the width direction of the belt-like film 26 is mainly performed by the belt-like film unwinding unit 32.

  The unrolled belt-like film 26 is adjusted in tension by the belt-like film tension adjusting unit 36 and is sent out at a predetermined speed by the pair of belt-like film delivery rollers 42.

  When the belt-like film 26 fed out as described above has a predetermined length, the belt-like film 26 leaves the peeling film 30 and at least the optical film 28 is cut by the belt-like film cutting unit 44.

  The strip film 26 cut out by cutting is sucked and transported by the film piece transport unit 46, and the strip film 30 is separated from the strip film 26 by the strip film separator 50.

  As described above, in the peeling film separating apparatus 50, the first roller 92 at the tip thereof is configured to have a small diameter, preferably about 10 mm, while the second to fourth rollers 94 to 98 have a large diameter, preferably It has a diameter of about 20 mm. The peeling film 30 is wound around the roller of the peeling film winding unit 54 constituting the peeling film winding unit 18 via the second transport system 52. In this case, as can be seen from FIG. 1, in the peeling film separating apparatus 50, the optical film 28 is transported in the same direction as the feeding direction of the belt-like film feeding roller pair 42, but the peeling film 30 is the first film. The conveying direction is sharply changed by one roller 92, that is, an acute angle. At that time, the winding force of the peeling film take-up unit 54 tries to bend the first roller 92, but the first roller 92 is in contact with the second roller 94 having a large diameter and high rigidity, and the bending. Function to prevent. The load from the first roller 92 to the second roller 94 is backed up by the third roller 96 and the fourth roller 98, and the first to fourth rollers 92 to 98 are equipped with a needle bearing 100 inside. The roller main body 104 can be easily rotated with respect to the shaft 106 because of the free roller.

  After all, in the peeling film separating apparatus 50, since there is no sliding contact portion between the first conveying system 16 or the second conveying system 52 and the peeling film 30 or the optical film 28, dust generation does not occur and at a high speed. The peeling film 30 can be separated from the optical film 28.

  Next, the strip-like film 26 from which the peeling film 30 has been separated is transported by the film piece transport unit 46 to a position where it is applied to the substrate 12 while the opposite surface is sucked by the film piece transport unit 46. At this time, the substrate 12 is transferred by the first substrate transfer unit 56 in parallel with the transfer of the optical film 28.

  Next, when a predetermined position on the transport path is passed, the transport speed of the substrate 12 is reduced, the transport of the substrate 12 is stopped, and the traveling direction of the substrate 12 and the positioning in the direction orthogonal thereto are performed. Here, the transfer of the substrate 12 is stopped by the first substrate transfer unit 56 and the substrate locking unit 64.

  When the positioning of the substrate 12 is completed by the substrate locking unit 64, the adhesive surface of the optical film 28 from which the peeling film 30 is separated is pasted to the corresponding position of the positioned substrate 12 by the pasting unit 66. Specifically, the pressure roller 70 is raised and the substrate 12 and the optical film 28 are pressure-bonded between the receiving roller 68 and integrated, and then sent from the second substrate transport unit 58 to the next process. .

FIG. 5 shows a second embodiment. In contrast to the embodiment shown in FIG. 3, the diameter of the roller from the peeling film separating apparatus 50 is different. That is, the diameters of the second roller 202, the third roller 204, the fourth roller 206, and the fifth roller 208 constituting the backup roller are gradually increased with respect to the first roller 200 (peeling film separating roller) . A backup effect for the first roller 200 is further obtained. In the second embodiment, the second transport system 52 is not in contact with the second to fifth rollers 202 to 208.

FIG. 6 shows a third embodiment of the peeling film separating apparatus 50. In this embodiment, a second roller 302 having a larger diameter than that constituting the backup roller is provided in contact with the first roller 300 having a small diameter (peeling film separating roller). The third roller 304 having a larger diameter is in contact with the fourth roller 306 having a smaller diameter and the fifth roller 308 having a larger diameter in this order. Space saving can be further achieved with respect to the second embodiment. Here, also in the third embodiment, the second transport system 52 is not in sliding contact with the second to fifth rollers 302 to 308.

FIG. 1 is a schematic front view of an optical film sticking apparatus according to a first embodiment of the present invention. FIG. 2 is a perspective view of the film separating apparatus incorporated in the optical film sticking apparatus of FIG. FIG. 3 is a partial cross-sectional front view of the first to fourth rollers of FIG. 2. FIG. 4 is a side view showing a non-sliding contact state between the first to fourth rollers and the second transport system 52 of FIG. FIG. 5 is an explanatory side view of a second embodiment of the film peeling apparatus according to the present invention. FIG. 6 is an explanatory side view of a third embodiment of the film peeling apparatus according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Optical film sticking apparatus 12 ... Board | substrate 14 ... Film unwinding part 16 ... 1st conveyance system 18 ... Stripping film winding part 20 ... Board | substrate conveyance part 22 ... Substrate positioning part 24 ... Film sticking part 26 ... Strip | belt-shaped film 28 ... Optical film 30 ... peeling film 32 ... strip-shaped film unwinding unit 34 ... unwinding transport system 36 ... strip-shaped film tension adjusting unit 38 ... unwinding roll 42 ... strip-shaped film delivery roller pair 44 ... strip-shaped film cutting unit 46 ... film piece transporting unit 46 DESCRIPTION OF SYMBOLS 50 ... Stripping film separator 52 ... 2nd conveyance system 54 ... Stripping film winding unit 56, 58 ... Substrate conveyance unit 60 ... Substrate latching unit 62 ... Substrate positioning unit 66 ... Pasting unit 68 ... Receiving roller 70 ... Pressure roller 80a, 80b ... holding plates 82a, 82b ... long holes 84a-84d ... holes 88a, 88b Screw holes 90a, 90b ... adjustment bolt 92,94,96,98,200,202,204,206,208,300,302,304,306,308 ... roller (backup roller)

Claims (4)

A belt-shaped film sending section for feeding a belt-like film having a release film stuck on the optical film via a sticking layer;
A peeling film separating section for separating the peeling film from the belt-like film;
A first transport system that is provided between the strip-shaped film delivery section and the peeling film separating section and transports the strip-shaped film;
A peeling film collecting unit for collecting the peeling film separated from the optical film by the peeling film separating unit;
A second conveying system provided between the peeling film separating unit and the peeling film collecting unit for conveying the separated peeling film, wherein the peeling film separating unit includes a peeling film separating roller, and the peeling film separating roller; A backup roller that contacts the film separation roller, wherein the peeling film separation roller is configured to have a smaller diameter than the backup roller, and the backup roller is formed by connecting a plurality of rollers having the same diameter. Film peeling device. A belt-shaped film sending section for feeding a belt-like film having a release film stuck on the optical film via a sticking layer;
A peeling film separating section for separating the peeling film from the belt-like film;
A first transport system that is provided between the strip-shaped film delivery section and the peeling film separating section and transports the strip-shaped film;
A peeling film collecting unit for collecting the peeling film separated from the optical film by the peeling film separating unit;
A second conveying system provided between the peeling film separating unit and the peeling film collecting unit, for conveying the separated peeling film;
The peeling film separating section includes a peeling film separating roller and a backup roller that contacts the peeling film separating roller, and the peeling film separating roller is configured to have a smaller diameter than the backup roller,
2. The film peeling apparatus according to claim 1, wherein a plurality of rollers that gradually increase in diameter as the backup roller moves away from the backup roller that contacts the peeling film separating roller are connected. A belt-shaped film sending section for feeding a belt-like film having a release film stuck on the optical film via a sticking layer;
A peeling film separating section for separating the peeling film from the belt-like film;
A first transport system that is provided between the strip-shaped film delivery section and the peeling film separating section and transports the strip-shaped film;
A peeling film collecting unit for collecting the peeling film separated from the optical film by the peeling film separating unit;
A second conveying system provided between the peeling film separating unit and the peeling film collecting unit, for conveying the separated peeling film;
The peeling film separating section includes a peeling film separating roller and a backup roller that contacts the peeling film separating roller, and the peeling film separating roller is configured to have a smaller diameter than the backup roller,
The backup roller includes at least a first backup roller in contact with the peeling film separating roller, a second backup roller in contact with the first backup roller, and a third backup roller in contact with the second backup roller. A fourth backup roller in contact with the third backup roller, wherein the second backup roller is larger in diameter than the first backup roller, and the third backup roller is larger than the second backup roller. Is a small diameter, and the fourth backup roller has a larger diameter than the third backup roller. In the film peeling apparatus in any one of Claims 1 thru | or 3,
The film peeling apparatus, wherein the peeling film separating roller and the backup roller are free rollers that are rotated by bearings.

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