JP5345233B2 - Knife edge and liquid crystal display manufacturing system including the same - Google Patents

Description

  The present invention relates to a knife edge and a liquid crystal display manufacturing system including the knife edge.

  Conventionally, a chip to panel method is known as a method of bonding an optical film (laminated film, polarizing film) to a liquid crystal panel in an optical display device manufacturing system.

  In an optical display device manufacturing system, an optical film is bonded to both sides of a liquid crystal panel. In the chip to panel method, a polarizing film is bonded to a liquid crystal panel one by one. For this reason, there exists a fault that production efficiency is low.

  On the other hand, there is a roll to panel bonding method as another method of the manufacturing system of the optical display device. For example, the manufacturing system and the manufacturing method of the optical display device of Patent Document 1 can be given.

  In the manufacturing system of Patent Document 1, after an optical film is bonded to the upper surface of the liquid crystal panel, the liquid crystal panel is turned and the optical film is bonded from the lower surface. In this method, an optical film provided with a release film is cut into a predetermined length via an adhesive slit to a predetermined width, the release film and the optical film are peeled off, and bonded to a liquid crystal panel. ing. For the peeling, a knife edge having a tapered tip and a rounded tip is used, whereby the peeling can be carried out efficiently.

Patent No. 4307510 (issued on Aug. 5, 2009)

  Usually, an optical film (polarizing film) provided with a release film is cut into a predetermined length according to the slit width of the liquid crystal panel, and at that time, the release is slit into a predetermined width. The shape of the end face of the film is deformed by cutting. After that, when the release film and the optical film are peeled off, the edge on the knife edge side of the end face of the release film that is deformed and the knife edge come into contact with each other to cause friction, and foreign matters are generated from this contact portion. There is a problem that it ends up.

  The present invention has been made in view of the above-described conventional problems, and its purpose is to reduce the friction between the edge of the release film where the deformation has occurred and the side where the knife edge contacts the knife edge. It is to reduce.

  In order to solve the above-mentioned problem, the knife edge of the present invention is a knife edge for peeling the release film from a laminated film including a release film. And a rotatable roller portion is incorporated in the distal end portion, and the roller portion protrudes from the first surface.

  According to this structure, a laminated film is conveyed along the 1st surface of a knife edge, and a peeling film peels from a laminated film in the front-end | tip part of a knife edge. Since the rotatable roller portion is incorporated at the tip of the knife edge so as to protrude from the first surface, when the laminated film is wrapped around the tip of the knife edge and conveyed, it is accompanied by the conveyance of the laminated film. The roller part rotates. Therefore, the friction between the knife edge and the laminated film is reduced, and the generation of foreign matters is suppressed.

  The knife edge of the present invention preferably has a second surface connected to the tip portion, and the roller portion protrudes from the second surface.

  According to this structure, the peeling film peeled from the laminated | multilayer film is conveyed along the 2nd surface of a knife edge. At this time, since the roller portion incorporated in the tip portion of the knife edge protrudes from the second surface of the knife edge, the peeling film does not contact the second surface in the vicinity of the tip portion of the knife edge, and only on the roller portion. Contact. Therefore, the friction between the knife edge and the peeling film when the peeling film is conveyed is reduced.

  In the knife edge of this invention, it is preferable that the said roller part is comprised by the at least 2 roller spaced apart from each other.

  According to this configuration, it is possible to make the release film difficult to bend while reducing the installation area of the entire roller unit. Further, when the roller part is constituted by three or more rollers separated from each other, a roller to be brought into contact with both ends of the release film is appropriately selected to provide a knife edge that can correspond to various widths of the release film. be able to.

  The liquid crystal display device manufacturing system according to the present invention is a liquid crystal display device manufacturing system in which a polarizing film is bonded to a liquid crystal panel, and a liquid crystal panel transport unit that transports the liquid crystal panel and a release film in the transport direction of the liquid crystal panel The unwinding part which unwinds the laminated | multilayer film provided with is provided, and the said bonding mechanism contains the said knife edge.

  According to this configuration, since the rotatable roller portion is incorporated at the tip of the knife edge, when the laminated film is wound around the tip of the knife edge, the friction between the knife edge and the laminated film is reduced. And the generation of foreign matter is suppressed.

  The liquid crystal display device manufacturing system of the present invention is a liquid crystal display device manufacturing system in which a polarizing film is bonded to a liquid crystal panel, and a liquid crystal panel transport unit for transporting the liquid crystal panel and a release film in the transport direction of the liquid crystal panel. An unwinding portion for unwinding the laminated film, a rotatable roller portion for winding the laminated film and peeling the release film from the laminated film, and the release film peeled from the laminated film by the roller portion A take-up portion that winds

  According to this configuration, when the laminated film is wound around the roller portion and transported, the roller portion rotates as the laminated film is transported, so that friction between the roller portion and the laminated film is reduced, and foreign matter is generated. Is suppressed.

  As described above, the knife edge of the present invention includes the first surface facing the laminated film to be conveyed and the tip portion connected to the first surface, and a rotatable roller portion is incorporated in the tip portion. In addition, the roller portion protrudes from the first surface.

  Therefore, the laminated film conveyed along the first surface comes into contact with the roller portion, and the roller portion rotates as the laminated film is conveyed. Therefore, the friction between the knife edge and the laminated film is reduced, and the generation of foreign matters is suppressed.

It is a side view which shows the manufacturing system of the liquid crystal display device which concerns on embodiment of this invention. It is a side view which shows the knife edge which concerns on embodiment of this invention. It is a side view which shows the angle of the front-end | tip part of the knife edge which concerns on embodiment of this invention. It is a top view which shows the knife edge which concerns on embodiment of this invention toward an upper surface. It is a top view which shows the knife edge which concerns on the modification of this invention toward an upper surface. It is a perspective view which shows the knife edge which concerns on embodiment of this invention toward the upper surface side. It is a top view which shows the state in which a peeling film is conveyed along the knife edge which concerns on embodiment of this invention.

  One embodiment of the present invention will be described below with reference to FIGS. 1 to 7, but the present invention is not limited to this.

  FIG. 1 is a side view showing a manufacturing system (a manufacturing system of a liquid crystal display device) 100 according to the present embodiment. The manufacturing system 100 includes a bonding mechanism that bonds the polarizing film 2 a to both surfaces of the liquid crystal panel 1. A transport direction D <b> 1 in FIG. 1 indicates the transport direction of the liquid crystal panel 1 in the manufacturing system 100.

  Next, each member with which the bonding mechanism of the manufacturing system 100 is provided is demonstrated. The bonding mechanism of the manufacturing system 100 includes an unwinding unit 3, a guide roller 4, a half cutter 5, a support base 6, a knife edge 7, nip rollers 8a and 8b, and a winding unit 9 ("nip rollers 8a and 8b"). Indicates "nip roller 8a and nip roller 8b". The same applies to other members). Further, a transport roller (liquid crystal panel transport unit) 10 and a reversing unit 11 are provided, and an unwinding unit 13, a guide roller 14, a half cutter 15, a support base 16, a knife edge 17, nip rollers 18a and 18b, and a winding unit 19 are provided. It has.

  The unwinding unit 3 unwinds the polarizing film in the transport direction of the liquid crystal panel 1, and in FIG. 1, the unwinding unit 3 unwinds the laminated film 2 in which the release film 2b is laminated on the polarizing film 2a. It has become. In the manufacturing system 100, the unwinding unit 3 has a structure that moves in a horizontal direction with respect to the axis of the raw roll of the laminated film 2. The movement is performed by a slide mechanism installed at the lower part of the unwinding unit 3. As the unwinding section 3, a conventionally known turret type unwinding section may be used.

  The laminated film 2 is sent out through the guide roller 4. In this Embodiment, what is necessary is just to adjust the speed | rate, tension | tensile_strength, etc. which unwind the laminated | multilayer film 2 suitably. What is necessary is just to change suitably the size of the unwinding part 3 with the size of the laminated | multilayer film 2 to be used, and it is not specifically limited. For example, an unwinding portion 3 having a size capable of installing the laminated film 2 having a film width of 300 mm or more and 1200 mm or less may be used.

  The laminated film 2 has a three-layer structure, and a known structure can be adopted. The laminated film 2 includes a polarizing film 2a, an adhesive layer (not shown), and a release film 2b.

  The following structure is mentioned as an example of a structure of the specific polarizing film 2a. That is, a TAC (triacetyl cellulose) film or the like is bonded as a protective film on both surfaces of the polarizer film, and an adhesive layer is applied (laminated) to one or both TAC films, and the release film 2b is applied to the adhesive layer. Can be mentioned.

  As the polarizer film, a polyvinyl alcohol film dyed with iodine or the like and a film stretched in a uniaxial direction can be used. Also, in place of the above films, partially formalized polyvinyl alcohol film, ethylene / vinyl acetate copolymer partially saponified film, hydrophilic polymer film such as cellulose film, etc., dehydrated polyvinyl alcohol and polyvinyl chloride A polyene-oriented film such as a dehydrochlorinated product can also be used.

  Although the total thickness of the polarizing film 2a adhesive layer and the peeling film 2b is not specifically limited, As an example, it can be 100 micrometers or more and 500 micrometers or less. In addition, the thickness of the polarizer film in the polarizing film 2a is generally 1 μm or more and 50 μm or less. Furthermore, the laminated film 2 may further contain other layers in addition to the above three layers within a practical range.

  The adhesive layer is used to bond the polarizing film 2a and the liquid crystal panel 1 after the release film 2b is removed. The pressure-sensitive adhesive used for the pressure-sensitive adhesive layer is not particularly limited, and an acrylic, epoxy, polyurethane-based pressure-sensitive adhesive can be used, but it needs to be easily peeled from the release film 2b. For this reason, the kind of adhesive is selected according to the peeling film 2b. In addition, what is necessary is just to change the thickness of the adhesion layer suitably, for example, can be 0.5 micrometer or more and 75 micrometers or less.

  A known release film may be used as the release film 2b. Specifically, a polyester film, a polyethylene terephthalate film, or the like can be used. Although it does not specifically limit as thickness of the said peeling film, The peeling film of 5 micrometers or more and 100 micrometers or less can be used preferably. Moreover, the width | variety of a peeling film can be 300 mm or more and 1200 mm or less. Note that the release film 2b may be generally referred to as a protective film or a separator.

  Although the laminated film 2 is conveyed through each guide roller 4, since the liquid crystal panel 1 is a sheet form, it is necessary to cut | disconnect the elongate polarizing film 2a and the adhesion layer before bonding. That is, the laminated film 2 needs to be half cut. The members for performing the half cut are the half cutter 5 and the support base 6. The support base 6 is disposed at a position in contact with the release film 2b and is installed to make it difficult for the laminated film 2 to be shaken. The polarizing film 2a and the adhesive layer are cut by the half cutter 5 while the release film 2b side is supported. At this time, the release film 2b is not cut. That is, the laminated film 2 is half cut.

  The knife edge 7 is a member for removing the release film 2 b from the laminated film 2. As a material constituting the knife edge 7, a metal material, a resin material, or the like can be applied. Although not particularly limited, stainless steel, aluminum, a resin material, and the like are recommended from the viewpoint of corrosion resistance. The knife edge 7 will be described later with reference to FIGS.

  Although not shown, the manufacturing system 100 includes a position adjusting device that adjusts the transport position of the laminated film 2 in the width direction, and the laminated films 2 and 12 (release film) conveyed along the knife edges 7 and 17. 2b and 12b) can be adjusted. Even if the end surface of the laminated film 2 meanders by the position adjusting device, the position of the laminated film 2 can be adjusted to an appropriate transport position. The reason for installing the position adjusting device is that the laminated film 2 is usually slit to a short width, and the end surface of the laminated film 2 is usually not flat (meandering) in the slitting process. . The position adjusting device includes a camera or an ultrasonic sensor for confirming the positions of the end faces of the laminated film 2 and the release film 2b, and a guide roller adjusting device for adjusting the position of the guide roller 4.

  Next, the conveyance roller 10 provided in the upper part of the manufacturing system 100 will be described. The liquid crystal panel 1 is conveyed between the nip rollers 8a and 8b for bonding with the polarizing film 2a.

  As the liquid crystal panel 1, a known liquid crystal panel can be used. For example, a liquid crystal panel in which an alignment film is disposed between a substrate such as a glass substrate and a liquid crystal layer can be used.

  The transport roller 10 is a member that transports the liquid crystal panel 1. The transport roller 10 only needs to be able to transport the liquid crystal panel, and can be replaced with another member (for example, a robot arm). The speed at which the liquid crystal panel 1 is conveyed can be adjusted at any time, and is not particularly limited.

  The nip rollers 8a and 8b are members for bonding the polarizing film 2a and the liquid crystal panel 1. Of the nip rollers 8 a and 8 b, the lower nip roller 8 b is disposed at the same height as the transport roller 10. On the other hand, the nip roller 8a is disposed above the nip roller 8b, and the polarizing film 2a is bonded to the lower surface of the liquid crystal panel 1 between the nip roller 8a and the nip roller 8b.

  The nip rollers 8a and 8b can change the distance between each other, and are bonded by pressing the adhesive layer surface of the polarizing film 2a and the liquid crystal panel 1. What is necessary is just to adjust suitably the pressure of the nip roller 8a * 8b at the time of bonding according to the kind of adhesive, the thickness of the polarizing film 2a, etc. FIG.

  The liquid crystal panel 1 having the polarizing film 2a bonded to the lower surface is reversed so that the reverse side 11 changes the front and back, and the short side along the transport direction is the long side. In FIG. 1, the liquid crystal panel inverted by the inversion unit 11 is shown as a liquid crystal panel 1a. In the manufacturing system 100, a robot arm is employed as the reversing unit 11. By reversing the liquid crystal panel 1a by the reversing unit 11, the polarizing film 12a is arranged so that the absorption axis of the polarizing film 12a is orthogonal to the absorption axis of the polarizing film 2a on the lower surface (the polarizing film is not bonded) of the liquid crystal panel 1a. Can be pasted.

  The long side of the liquid crystal panel 1 may be transported along the transport direction. In that case, the short side of the liquid crystal panel 1a after being reversed by the reversing unit 11 is transported along the transport direction. Will be.

  The liquid crystal panel 1a that is reversed and has the long side along the transport direction D1 is further transported in the transport direction D1 and reaches the nip rollers 18a and 18b. The nip rollers 18a and 18b are arranged so that the gap between the nip rollers 18a and 18b is wider than the gap between the nip rollers 8a and 8b by the width of the bonded polarizing film 2a.

  Below the nip roller 18 b, similarly to the unwinding unit 3, the laminated film 12 is unwound from the unwinding unit 13, and the polarizing film 12 a and the adhesive layer of the laminated film 12 are half-cut by the half cutter 15. Thereafter, the release film 12b is peeled from the laminated film 12 by the knife edge 17, and the polarizing film 12a is bonded to the lower surface of the liquid crystal panel 1a via the adhesive layer between the nip roller 18a and the nip roller 18b. The liquid crystal panel 1a in which the polarizing films are bonded to both sides corresponds to the liquid crystal display device, and the liquid crystal display device is manufactured by the manufacturing system 100.

  The knife edge 7 according to the present invention will be further described. The same applies to the knife edge 17. FIG. 2 is a side view showing the knife edge 7. The knife edge 7 includes an upper surface (second surface) 20, a front end portion 21, a lower surface (first surface) 22, and a rear end 23. Further, in order to reduce friction with the release film 2b, the knife edge 7 incorporates a rotatable roller (roller portion) 25 at the tip portion 21, and the upper surface 20, the tip portion 21 of the knife edge 7, and The lower surface 22 has a smoothly connected shape. Specifically, the roller 25 is entirely cylindrical and has a circular cross section. The upper surface 20 and the lower surface 22 have a planar shape, and the distal end portion 21 has a curved shape so as to be smoothly connected to the upper surface 20 and the lower surface 22.

  The lower surface 22 is a surface facing the laminated film 2, and the lower surface 22 and the tip 21 are smoothly connected and no corners are formed. Moreover, the front-end | tip part 21 and the upper surface 20 are also connected smoothly, and the corner | angular is not formed. Since there is no problem as long as the release film 2b is not damaged, the lower surface 22, the tip 21 and the upper surface 20 need only have a smooth shape where the release film 2b contacts, and the portion where the release film 2b does not contact is smooth. It does not have to be a simple shape. For example, the lower surface 22 and the side surface 24a are not smoothly connected and have corners, but the side surface 24a and the release film 2b do not come into contact with each other, so no problem occurs.

  The side surfaces 24a and 24b only need to connect the upper surface 20, the front end portion 21, the lower surface 22 and the rear end 23, and the shape of the side surfaces 24a and 24b is not particularly limited, and may be a flat surface or a curved surface. Further, as a modification of the knife edge 7, a structure including a support member that supports the tip portion 21 and the lower surface 22 in place of the side surfaces 24a and 24b can be cited. If the tip 21 and the lower surface 22 are supported by the support member and the structure of the knife edge is maintained, the knife edge according to the present invention can be configured. Here, the smooth shape means a shape formed by at least one of a flat surface and a curved surface.

  The rear end 23 only needs to connect the upper surface 20, the lower surface 22, and the side surfaces 24a and 24b, and the shape of the rear end 23 is not particularly limited. Similar to the side surfaces 24 a and 24 b, the shape may be a flat surface or a curved surface, or may be a support member that supports the upper surface 20 and the lower surface 22 instead of the rear end 23. Even if the rear end 23 is not present, the rear end 23 may not be present as long as the structure of the knife edge 7 including the front end portion 21 and the lower surface 22 can be maintained.

  FIG. 3 is a side view showing the angle of the tip 21 of the knife edge 7. As shown in FIG. 3, the tip 21 has an arc shape. For this reason, the side surface (and cross section) of the front end portion 21 has a fan shape, and the central angle A of the side surface is 155 ° at the front end portion 21 of the knife edge 7. Since the upper surface 20 and the lower surface 22 are connected to the distal end portion 21 along the normal line of the distal end portion 21, the upper surface 20 and the lower surface 22 are not horizontal to each other and have an inclination.

  Since the roller 25 protrudes from the lower surface 22, there is a gap between the release film 2 b and the tip portion 21. In the knife edge according to the present invention, at least the roller 25 protrudes from the surface including the arc-shaped normal line of the front end portion 21 and the lower surface 22 because large friction is likely to occur when the release film is peeled from the laminated film. Just do it. In the knife edge 7, the roller 25 protrudes from the upper surface 20, but this form is a preferable form which further reduces the friction between the knife edge and the release film.

  The arc shape (side surface and cross section) of the distal end portion 21 is not limited to the sector shape having the central angle A of 155 °. For example, the arc shape may have a sector shape having a central angle A of 30 ° or more and 180 ° or less. can do. Preferably, the arc shape of the distal end portion 21 is a fan having a central angle A of 45 ° or more and 180 ° or less, more preferably a fan having a central angle A of 90 ° or more and 180 ° or less, particularly preferably a center. It has a fan shape with an angle of 120 ° or more and 180 ° or less. When the central angle A is less than 30 °, the distance between the peeled release film 2b and the polarizing film 2a is short, and it becomes difficult to carry them.

  On the other hand, when the central angle A is 45 ° or more, and further 120 ° or more, the manufacturing system 100 that can transport the release film 2b and the polarizing film 2a in different transport directions and easily collect the release film 2b is provided. This is preferable. When the central angle A is 180 °, the upper surface 20 and the lower surface 22 are formed in parallel, the cross-section of the tip 21 is semicircular, and the roller 25 is set to be larger than the radius of the tip 21. Can be projected from the lower surface 22 and incorporated into the distal end portion 21. Further, when the central angle A exceeds 180 °, the upper surface 20 cannot be formed along the distal end portion 21, and it is difficult to design the distal end portion 21 and the upper surface 20 in a smooth structure.

  The release film 2 b provided on the laminated film 2 is conveyed along the lower surface 22. As described above, the conveyance of the release film 2b along the lower surface 22 can be performed by adjusting the positions of the guide roller 4, the knife edge 7, and the nip roller 8b. Since the adhesive force between the adhesive layer (not shown) and the release film 2b is small, the release film 2b transported along the lower surface 22 is wound around the roller 25 and is changed from the transport direction to leave the adhesive layer, It is conveyed along the roller 25. On the other hand, the polarizing film 2a whose conveyance direction is fixed along the lower surface 22 is separated from the release film 2b and conveyed together with the adhesive layer, and then bonded to the liquid crystal panel 1.

  Since the radius of the tip 21 is appropriately changed according to the thickness and hardness of the release film 2b, it is difficult to uniquely define, but as an example, the radius of the sector side surface of the tip 21 is 1 mm or more. 10 mm or less, preferably 2 mm or more and 5 mm or less. In the knife edge 7, the radius of the tip 21 is 2 mm.

  The roller 25 rotates along the arc shape of the distal end portion 21. Although not shown, the roller 25 is provided with a rotating shaft positioned perpendicular to the conveying direction of the release film 2b. When the release film 2b (laminated film 2) contacts the roller 25, the release film 2b and the roller 25 moves at the same speed. In addition, the roller 25 should just be rotatable with respect to the conveyance direction of the peeling film 2b, and may replace it with the structure which is not provided with a rotating shaft.

  The material of the roller 25 is preferably a material that does not generate rust during the operation of the manufacturing system 100 in a clean room environment and that can be smooth when processed into the roller 25. For example, SUS (Steel Use Stainless) is used. Can do.

  The roller 25 is incorporated along the arc shape of the tip 21. That is, when viewed from the direction of the rotation axis of the roller 25, the outer peripheral surface of the roller 25 is disposed so as to circumscribe the outer peripheral surface of the tip portion 21 formed in an arc shape. Since the roller 25 protrudes from the lower surface 22, the release film 2 b conveyed along the lower surface 22 does not come into contact with the front end portion 21 and is peeled off along the roller 25. Moreover, since the roller 25 is incorporated along the circular arc shape of the front end portion 21, the release film 2b is transported without the front end portion 21 preventing the transport of the release film 2b. In addition, since the peeled peeling film 2b is conveyed along the upper surface 20, the upper surface can be referred to as a peeling film conveying surface.

  FIG. 4 is a plan view showing the knife edge 7 toward the upper surface 20. In the knife edge 7, a concave portion (opening portion) is formed at the distal end portion 21, and a roller 25 is incorporated in the concave portion. The roller 25 is formed so that the width W1 is equal to or larger than the width of the release film 2b so as to contact both ends of the release film. Specifically, the both side edges mean both side edges along the transport direction on the surface facing the lower surface of the release film 2b when the release film 2b is transported.

  The end surface of the long release film 2b (the surface perpendicular to the lower surface 22 during transportation) is not necessarily along the flow direction (line direction) of the release film 2b, but is meandering. Is normal. However, since the position of the end face of the release film 2b is adjusted by a position adjusting device (not shown), the width W1 does not have to be set much larger than the width of the release film 2b. For example, the width W1 can be set larger than the width of the release film 2b by 1 mm or more and 10 mm or less, preferably 2.5 mm or more and 7.5 mm or less.

  As described above, the roller 25 related to the knife edge 7 is a single roller, but has a length capable of contacting both ends of the release film 2b. On the other hand, the knife edge according to the present invention may include at least two rollers as a roller portion. These rollers are spaced apart from each other and are disposed along the width direction of the release film 2b. The rotation axes of the rollers coincide with each other. Further, each of these at least two rollers is arranged such that one roller contacts one end of the release film 2b and the other roller contacts the other end of the release film 2b. According to this structure, since each roller contacts the both ends of a peeling film, the installation area | region as the whole roller part can be made small, and a peeling film can be made hard to bend.

  FIG. 5 shows a knife edge according to a modification of the present invention. FIG. 5 is a plan view showing the knife edge 7 a according to the present invention toward the upper surface 20. The side view of the knife edge 7a is the same as FIG. As shown in FIG. 5, the knife edge 7 a is provided with rollers 25 a, 25 b, 25 c, and 25 d that are separated from each other along the width direction of the release film 2 b. Thus, by providing three or more rollers, it is possible to cope with various widths of the release film 2b.

  At the knife edge 7a, the release film 2b is conveyed so that the two rollers are in contact with both ends of the release film 2b. For this reason, according to the width | variety of the peeling film 2b, roller 25a * 25b, 25a * 25c, 25a * 25d, 25b * 25c, 25b * 25d or 25c * 25d can be selected as a combination of the roller used as a roller part. is there. With this variety of selections, the knife edge 7a can be adapted to release films with different widths and can be used to manufacture liquid crystal display devices with different widths. The number of rollers installed is not particularly limited, and may be five, six, or more.

  Each width W2 of the rollers 25a to 25d can be 2 mm or more and 20 mm or less, preferably 5 mm or more and 15 mm or less. Since the width W2 is small, it is possible to provide knife edges 7 and 17 that are difficult to prevent the peeling and transport of the release film 2b.

  It is preferable that the maximum width between the rollers (the distance between the centers of the respective rollers) matches the width of the release film 2b. In FIG. 5, since the width of the release film 2b is 1200 mm, the width W3 between the rollers 25a and 25d is set to 1200 mm. On the other hand, the width W4 between the rollers 25b and 25c is set to 300 mm in order to cope with the conveyance of the narrow release film.

  FIG. 6 is a perspective view showing the knife edge 7 a toward the upper surface 20, and shows that the rollers 25 a to 25 d protrude from the upper surface 20. The same applies to the lower surface 22.

  FIG. 7 is a plan view showing a state in which the release film 2b is conveyed along the knife edge 7a according to the embodiment of the present invention. As described above, since both ends of the release film 2b are in contact with the roller 25a at one end and the roller 25d at the other end, both the release film 2b and the rollers 25a and 25d rotate at the same speed. Friction hardly occurs between the release film 2b and the rollers 25a and 25d. FIG. 7 shows a portion where the edge of the release film 2b and the roller are in contact with each other by a broken circle.

  According to the knife edge 7a according to the present invention, since it is possible to reduce the amount of foreign matters such as film scraps that have conventionally been easily generated at the tip of the knife edge, it is difficult for foreign matters to adhere to the adhesive layer. As a result, the quality of the liquid crystal display device which is the final product is hardly deteriorated, and the production yield can be improved.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

  For example, in the above-described embodiment, the roller (roller portion) 25 is incorporated at the tip of the knife edges 7 and 17, but the roller 25 is not incorporated at the tip of the knife edges 7 and 17, and only the roller 25 is used as the bonding mechanism. Even if it is installed in the vicinity, the same effect as the above embodiment can be obtained.

  That is, in the said embodiment, the manufacturing system of a liquid crystal display device is the laminated | multilayer film 2,12 provided with the peeling roller 2b, 12b in the conveyance direction of the conveyance roller 10 which conveys the liquid crystal panels 1 and 1a, and the liquid crystal panels 1 and 1a. The unwinding part 3 and the unwinding part 13 which unwind is provided, and the said bonding mechanism shall be the said knife edge 7 and 17 included.

  On the other hand, the manufacturing system of the liquid crystal display device winds the laminated films 2 and 12 including the transport rollers 10 for transporting the liquid crystal panels 1 and 1a and the release films 2b and 12b in the transport direction of the liquid crystal panels 1 and 1a. The unwinding parts 3 and 13 to be taken out, a rotatable roller (roller part) 25 for winding the laminated films 2 and 12 to peel the release films 2b and 12b from the laminated films 2 and 12, and the laminated film 2 with the roller 25, It is good also as having the winding-up parts 9 and 19 which wind up the peeling films 2b and 12b peeled from 12. For example, the liquid crystal display device manufacturing system has a configuration including a roller 25 instead of the knife edge 7 including the roller 25 shown in FIG. 3. In the liquid crystal display device manufacturing system, the roller 25 is a knife. It also serves as the edge 7.

  According to this configuration, when the laminated films 2 and 12 are wound around the roller 25 and conveyed, the roller 25 rotates as the laminated films 2 and 12 are conveyed, so that the gap between the roller 25 and the laminated films 2 and 12 is increased. Friction is reduced, and the generation of foreign matter is suppressed.

  The knife edge according to the present invention can be used in the field of bonding an optical film to a liquid crystal panel.

1.1a Liquid crystal panel 2.12 Laminated film 2a.12a Polarizing film 2b.12b Release film 3.13 Unwinding part 4.14 Guide roller 5.15 Half cutter 6.16 Support base 7..7a.17 Knife edge 8a. 8b / 18a / 18b Nip roller 9.19 Winding part 10 Conveying roller (liquid crystal panel conveying part)
11 Inversion part 20 Upper surface (2nd surface)
21 tip 22 lower surface (first surface)
23 Rear end 24a / 24b Side surface 25 / 25a / 25b / 25c / 25d Roller (roller part)
100 Manufacturing system A Center angle D1 Transport direction

Claims (6)

From the laminated film including the release film, in the knife edge to release the release film,
A first surface facing the laminated film to be conveyed;
A tip portion connected to the first surface,
A knife edge in which a rotatable roller portion is incorporated in the tip portion, and the roller portion protrudes from the first surface.   The knife edge according to claim 1 which has the 2nd surface connected to said tip part, and said roller part has projected from said 2nd surface.   The knife edge according to claim 1 or 2, wherein said roller part is constituted by at least two rollers spaced apart from each other.   The knife edge according to claim 3 in which said roller part is constituted by three or more rollers spaced apart from each other. In a manufacturing system of a liquid crystal display device that bonds a polarizing film to a liquid crystal panel,
A laminating mechanism including a liquid crystal panel transport unit that transports the liquid crystal panel and an unwinding unit that unwinds the laminated film including the release film in the transport direction of the liquid crystal panel,
The said bonding mechanism is a manufacturing system of the liquid crystal display device containing the knife edge of any one of Claims 1-4. In a manufacturing system of a liquid crystal display device that bonds a polarizing film to a liquid crystal panel,
A liquid crystal panel transport unit that transports the liquid crystal panel, an unwinding unit that unwinds the laminated film provided with the release film in the transport direction of the liquid crystal panel, and a rotation that winds the laminated film and peels the release film from the laminated film. A system for manufacturing a liquid crystal display device, comprising: a free roller portion; and a winding portion that winds up the release film peeled off from the laminated film by the roller portion.

Images