CN115279676A - Method for manufacturing glass roll and device for manufacturing glass roll - Google Patents

Abstract

When a band-shaped glass film (G) is unwound by an unwinding section (2) and the unwound glass film (G) is wound by a winding section (4) to obtain a glass roll (G), a conveying speed adjusting section (5) for adjusting a conveying speed at which the glass film (G) unwound by the unwinding section (2) is conveyed toward the winding section (4) is provided between the unwinding section (2) and the winding section (4). A conveying distance changing part (6) capable of changing the conveying distance of the glass film (G) in the width direction of the glass film (G) is arranged between the conveying speed adjusting part (5) and the winding part (4).

Description

Method for manufacturing glass roll and device for manufacturing glass roll

Technical Field

The present invention relates to a method and an apparatus for manufacturing a glass roll.

Background

The glass roll is manufactured by winding a belt-like glass film in a roll shape. While the manufactured ribbon-shaped glass film is conveyed, the ribbon-shaped glass film is subjected to manufacturing-related processes such as cutting, film formation, surface treatment, and cleaning.

In addition, when the production-related process is performed while being conveyed as described above, the glass film may be conveyed in a state of being adsorbed on the belt surface of the belt conveyor in the production-related process area or the areas before and after the production-related process area in the conveying direction (see, for example, patent document 1). Since the glass film can be stably held by using the belt conveyor capable of suction, the conveyance speed of the glass film can be controlled by the feed speed of the belt conveyor. Therefore, the manufacturing-related process can be performed with high accuracy and stability, and a high-quality glass roll can be obtained.

Documents of the prior art

Patent literature

Patent document 1: japanese laid-open patent publication No. 2018-150131

Disclosure of Invention

Problems to be solved by the invention

However, in the case of providing a suction-capable belt conveyor as described in patent document 1, in order to accurately wind the glass film by the winding section without displacement in the width direction or the like, it is conceivable to dispose the belt conveyor at a position relatively close to the winding section and apply a sufficient tension to the glass film supplied to the winding section. In this case, the glass film passing on the belt conveyor is blocked from the glass film located on the upstream side of the belt conveyor, for example. Therefore, when the glass film having passed through the belt conveyor is deformed such as wrinkled, the above-described kinds of deformation are accumulated and easily increased as the glass film is continuously conveyed. Further, since the distance from the belt conveyor to the winding section is short, it is difficult to eliminate the distortion such as wrinkles which temporarily occurs. Therefore, the risk of breakage of the glass film due to the glass film in this state being wound in a roll shape by the winding section is increased.

In view of the above, an object of the present invention is to provide a method for manufacturing a glass roll by winding a glass film while adjusting the conveyance speed of the glass film, which can eliminate or suppress deformation such as wrinkles generated during conveyance of the glass film and accurately wind the glass film in a roll shape without damaging the glass film.

Means for solving the problems

The above object is achieved by the method for manufacturing a glass roll of the present invention. That is, the manufacturing method of a glass roll is a method of manufacturing a glass roll in which a belt-shaped glass film is unwound by an unwinding section and the unwound glass film is wound by a winding section to obtain a glass roll, and is characterized in that a conveying speed adjusting section for adjusting a conveying speed at which the glass film unwound by the unwinding section is conveyed toward the winding section is provided between the unwinding section and the winding section, and a conveying distance changing section capable of changing a conveying distance of the glass film in a width direction of the glass film is provided between the conveying speed adjusting section and the winding section. In the present specification, the width direction of the glass film means a direction orthogonal to both the longitudinal direction and the thickness direction of the glass film.

In this way, in the method for manufacturing a glass roll according to the present invention, the conveying distance changing unit capable of changing the conveying distance of the glass film in the width direction of the glass film is provided between the conveying speed adjusting unit and the winding unit. According to this configuration, the conveying distance of the glass film can be made different in the width direction with respect to the glass film that has passed through the conveying speed adjusting section and reached the conveying distance changing section. Therefore, for example, when a deformation such as a wrinkle is generated on one side in the width direction of the glass film and the glass film tends to expand, the deformation such as a wrinkle on one side in the width direction can be eliminated or suppressed by making the conveying distance on one side in the width direction of the glass film longer than the conveying distance on the other side in the width direction of the glass film. Therefore, it is possible to prevent the deformation such as wrinkles from accumulating and becoming large. Therefore, the glass film in this state can be wound to prevent breakage during winding, thereby stably obtaining a high-quality glass roll.

In the method for manufacturing a glass roll according to the present invention, a processing unit related to the manufacturing of a glass film may be provided between the unwinding unit and the conveyance speed adjusting unit.

According to the method for manufacturing a glass roll of the present invention, even when the conveyance speed adjustment unit for the glass film is provided, the deformation such as wrinkles generated during the conveyance of the glass film can be eliminated or suppressed, and the glass film can be accurately wound in a roll shape without being damaged. By providing the glass film production-related processing unit between the unwinding unit and the conveyance speed adjusting unit, the glass film is restrained in the conveyance speed adjusting unit after the glass film production-related processing, and the influence of the restraint on the glass film can be prevented from reaching the production-related processing unit. As a result, since the conveyance speed adjusting portion is disposed at a position close to the winding portion, the glass film subjected to the manufacturing-related process can be safely wound, and a high-quality glass roll can be stably obtained.

In the method for producing a glass film according to the present invention, a laminating section for laminating a protective film on a glass film by attaching the protective film to the glass film via an adhesive layer may be provided between the conveying speed adjusting section and the winding section, and the conveying distance changing section may be provided between the conveying speed adjusting section and the laminating section.

In the laminating section where the protective film is laminated on the glass film, the glass film is fixed and conveyed by arranging nip rollers or the like on both surfaces of the glass film. In particular, the glass film tends to be easily deformed such as wrinkles or the like, between two positions where the glass film is fixedly conveyed, such as between the laminating section and the conveying speed adjusting section. According to the method for manufacturing a glass roll of the present invention, the conveyance distance changing section is provided between the laminating section and the conveyance speed adjusting section, and thus accumulation of deformation such as wrinkles can be effectively prevented.

In the method for manufacturing a glass roll according to the present invention, the conveyance distance changing unit may be configured to change the conveyance distance of the glass film at the end in the width direction of the glass film.

When the glass film unwound from the roll is rewound into a roll while adjusting the conveyance speed of the glass film, deformation such as wrinkles tends to be particularly conspicuous at the widthwise ends of the glass film. In view of this point, in the present invention, the conveyance distance changing unit is configured to be able to change the conveyance distance of the glass film at the end in the width direction of the glass film. With this configuration, the effect of varying the conveyance distance in the width direction of the glass film can be more effectively enjoyed. Therefore, deformation such as wrinkles can be more effectively eliminated or suppressed, and a high-quality glass roll can be more reliably obtained.

In the method for manufacturing a glass roll according to the present invention, the conveying distance changing unit may be provided at a plurality of different positions in the conveying direction of the glass film.

By providing the conveyance distance changing unit at a plurality of locations in the conveyance direction as described above, the conveyance distance of the glass film can be changed more. In other words, the conveying distance can be largely different in the width direction of the same glass film. Therefore, even when deformation such as wrinkles is large, the deformation can be effectively eliminated or suppressed. Further, since the conveyance distance changing unit is provided at a plurality of locations, the conveyance distance can be changed at different positions in the width direction of the glass film, and thus, for example, the conveyance distance at one side in the width direction of the glass film can be increased by the conveyance distance changing unit at the upstream side to eliminate or suppress deformation such as wrinkles occurring at the one side in the width direction, and the conveyance distance at the other side in the width direction of the glass film can be slightly increased by the conveyance distance changing unit at the downstream side to finely adjust the conveyance distance of the glass film. Therefore, according to the above configuration, the conveying distance can be adjusted with higher accuracy.

In the method for manufacturing a glass roll according to the present invention, the conveying speed adjusting section may be disposed in a relatively upper region, the winding section may be disposed in a relatively lower region, and a conveying direction changing region for changing the conveying direction of the glass film passing through the conveying speed adjusting section may be disposed between the conveying speed adjusting section and the winding section.

In the case where the conveyance speed adjusting section and the winding section are arranged at positions different from each other in the height direction in this manner, it is necessary to change the conveyance direction of the glass film (set direction changing region) between the conveyance speed adjusting section and the winding section. In the direction change region, since the glass film is generally changed in the conveyance direction from the horizontal direction (including a case where the glass film has some inclination angle with respect to the horizontal direction) to the vertical direction (including a case where the glass film has some inclination angle with respect to the vertical direction), the glass film may be deformed in a curved shape in the conveyance direction change region. Therefore, by providing the conveying distance changing section in the direction change region, the conveying distance of the portion of the glass film deformed in a curved shape can be changed in the width direction. In the case of a portion of the glass film deformed in a curved shape, for example, by pressing the curved portion from the concave surface side, the conveying distance of the glass film can be easily made different in the width direction from that of a portion of the glass film deformed in a flat shape.

In the method for manufacturing a glass roll according to the present invention, the conveyance distance changing unit may include a roller that can come into contact with the surface of the glass film, and the roller may be configured to be rotatable about an axis orthogonal to a rotation axis of the roller.

By configuring the conveying distance changing unit with a roller that can come into contact with the glass film surface in this manner, the roller can be used as a support roller that supports the glass film while being conveyed. In other words, the conventional support roller can be a roller of the conveyance distance changing unit. In this case, the roller is configured to be rotatable about an axis orthogonal to the rotation axis of the roller, so that the roller can be brought into contact with the glass film surface in a state inclined with respect to the width direction of the glass film. This makes it possible to support the glass film by the roller and to make the conveying distance on one side in the width direction of the glass film larger than the conveying distance on the other side in the width direction. Therefore, smooth conveyance of the glass film can be ensured, and deformation such as wrinkles occurring in the glass film can be effectively eliminated or suppressed.

Further, the above problem is also solved by the apparatus for manufacturing a glass roll of the present invention. That is, the manufacturing apparatus is a manufacturing apparatus of a glass roll, and includes: a unwinding section that unwinds a belt-shaped glass film; a winding section that winds an unwound glass film to obtain a glass roll; and a conveying speed adjusting part which is arranged between the unwinding part and the winding part and adjusts the conveying speed when the glass film unwound by the unwinding part is conveyed towards the winding part, wherein a conveying distance changing part which can change the conveying distance of the glass film in the width direction of the glass film is arranged between the conveying speed adjusting part and the winding part.

As described above, in the apparatus for manufacturing a glass roll according to the present invention, the conveying distance changing unit capable of changing the conveying distance of the glass film in the width direction of the glass film is provided between the conveying speed adjusting unit and the winding unit. According to this configuration, the conveying distance of the glass film can be made different in the width direction with respect to the glass film that has passed through the conveying speed adjusting section and reached the conveying distance changing section. Therefore, for example, when a deformation such as a wrinkle is generated on one side in the width direction of the glass film and the glass film tends to expand, the deformation such as a wrinkle on one side in the width direction can be eliminated or suppressed by making the conveying distance on one side in the width direction of the glass film larger than the conveying distance on the other side in the width direction of the glass film. Therefore, it is possible to prevent the deformation such as wrinkles from accumulating and becoming large. Therefore, by winding the glass film in this state, breakage during winding can be prevented, and a high-quality glass roll can be stably obtained.

Effects of the invention

As described above, according to the present invention, when a glass film is wound up to produce a glass roll while adjusting the conveyance speed of the glass film, it is possible to eliminate or suppress deformation such as wrinkles generated during conveyance of the glass film, and to accurately wind the glass film in a roll shape without breaking.

Drawings

Fig. 1 is a side view of the overall configuration of a glass roll manufacturing apparatus according to a first embodiment of the present invention.

Fig. 2 is a side-enlarged view of the conveyance distance changing unit shown in fig. 1.

Fig. 3 is a front view of the conveyance distance changing unit and its drive mechanism shown in fig. 2.

Fig. 4 is a plan view of the conveyance distance changing unit and its driving mechanism shown in fig. 2.

Fig. 5 is a plan view for explaining an example of adjustment of the conveyance distance changing unit shown in fig. 2.

Fig. 6 is a plan view for explaining another example of adjustment of the conveyance distance changing unit shown in fig. 2.

Fig. 7 is a plan view of a conveyance distance changing unit and a driving mechanism thereof according to a second embodiment of the present invention.

Detailed Description

A first embodiment of a method for manufacturing a glass roll according to the present invention will be described below with reference to fig. 1 to 6.

As shown in fig. 1, a glass roll manufacturing apparatus 1 according to a first embodiment of the present invention includes: a unwinding section 2 that unwinds the glass film G from the first glass roll GR 1; a manufacturing-related processing unit 3 that performs a predetermined manufacturing-related process on the unwound glass film G; a winding unit 4 that winds the glass film G subjected to the manufacturing-related process to obtain a second glass roll GR2; a conveying speed adjusting part 5 for adjusting the conveying speed of the glass film G; and a conveying distance changing unit 6. In the present embodiment, the glass roll manufacturing apparatus 1 further includes a laminating unit 7 for laminating a protective film F on the glass film G.

In the present embodiment, as shown in fig. 1, the manufacturing-related processing unit 3 is disposed upstream of the conveyance speed adjustment unit 5 in the conveyance direction of the glass film G, and the conveyance distance changing unit 6 is disposed between the conveyance speed adjustment unit 5 and the winding unit 4. Further, a laminating section 7 is disposed between the conveying distance changing section 6 and the winding section 4.

In the present embodiment, a first direction change region 8 for changing the conveyance direction of the glass film G from the upward direction to the horizontal direction is disposed between the unwinding section 2 and the manufacturing-related processing section 3, and a second direction change region 9 for changing the conveyance direction of the glass film G from the horizontal direction (including a case where the conveyance direction has a predetermined inclination angle with respect to the horizontal direction) to the downward direction is disposed between the conveyance speed adjusting section 5 and the laminating section 7 (winding section 4). Thus, the manufacturing-related processing unit 3 and the conveying speed adjusting unit 5 are located in a relatively upper region, and the unwinding unit 2 and the winding unit 4 are located in a relatively lower region. In the XYZ coordinate system shown in fig. 1, the X direction and the Y direction coincide with the horizontal direction, and the Z direction coincides with the vertical direction (the upward direction and the downward direction). The Y direction coincides with the width direction of the glass film G.

The unwinding section 2 unwinds the glass film G from the first glass roll GR1 and supplies the unwound glass film G to the manufacturing-related processing section 3. Here, the glass film G is a base glass film formed in a band shape by a predetermined forming portion, not shown, or a glass film obtained by subjecting a base glass film to a predetermined manufacturing-related process.

In the present embodiment, the manufacturing-related processing unit 3 includes: a chemical treatment device 10 that applies a predetermined chemical treatment to an end surface of the glass film G unwound from the first glass roll GR 1; a surface treatment device 11 for performing a predetermined surface treatment on the chemically treated glass film G; and a cleaning device 12 for cleaning the glass film G subjected to the surface treatment. The structure of the processing unit 3 related to manufacturing shown in fig. 1 is merely an example. Two or less or four or more processing devices may be provided as necessary. The type of the processing apparatus is not limited to the illustrated one, and may be arbitrarily arranged as long as it is an apparatus that is generally considered to be used for processing related to the production of the glass film G, such as a cutting apparatus and a film forming apparatus.

The winding section 4 winds the glass film G subjected to the manufacturing-related process performed by the manufacturing-related process section 3 in a roll shape by rotating the winding core 13. In the present embodiment, the protective film F is laminated on the glass film G by the laminating section 7 disposed on the upstream side of the winding section 4 in the conveying direction of the glass film G, and the laminated film GF thus obtained is wound in a roll shape. Therefore, the second glass roll GR2 obtained by the winding section 4 is configured such that the glass film G and the protective film F are alternately stacked. A resin sheet such as a polyethylene terephthalate sheet, not shown, may be used as a buffer sheet, and the buffer sheet may be sandwiched between the glass film G and the protective film F and wound to form a second glass roll GR2.

The conveyance speed adjusting section 5 is a conveying device that supports and conveys the glass film G, and is configured to be capable of adjusting the conveyance speed of the glass film G. In the present embodiment, the conveying speed adjusting section 5 is a belt conveyor 14 capable of adsorbing the glass film G, and includes: an air suction device that performs air suction through a belt hole provided in the belt conveyor 14, for example; a drive source such as a motor for applying a driving force to the belt; and a control unit (all not shown) for controlling the drive source. Here, the conveying support surface 14a of the belt conveyor 14 may be in a direction that coincides with the horizontal direction (X direction in the present embodiment). Alternatively, as shown in fig. 2, the belt conveyor 14 may be arranged at an inclination such that the conveyance support surface 14a has a predetermined inclination angle (becomes lower as it goes to the downstream side) with respect to the horizontal direction of the conveyance support surface.

In the present embodiment, the case where the conveying speed adjusting section 5 is the belt conveyor 14 capable of adsorbing the glass film G is exemplified, but the present invention is not limited to this. Any configuration can be adopted as long as a desired conveyance speed can be imparted to the glass film G while the glass film G is held.

In addition to the conveying speed adjusting section 5 as the conveying device, another conveying device for conveying the glass film G may be provided between the unwinding section 2 and the winding section 4, and illustration thereof is omitted. In this case, the other conveying device is not limited to the belt conveyor, and may be a roller conveyor or other various conveying mechanisms.

The laminating unit 7 can laminate the protective film F on the glass film G by attaching the protective film F to the glass film G through an adhesive layer (not shown), and the laminating unit 7 includes a pair of nip rollers 15a and 15b and a protective film roll FR formed by winding the protective film F in a roll shape. The protective film roll FR is a roll-shaped member formed by winding a roll core 16 around an adhesive layer formed by overlapping a spacer on one surface of a tape-shaped protective film F, and is not shown. The protective film roll FR is disposed in the vicinity of the pair of nip rollers 15a and 15b, and is configured to be able to supply the protective film F between the pair of nip rollers 15a and 15 b. The spacer may be omitted depending on the type and adhesive force of the adhesive layer.

Fig. 2 is a side view of a main part of the conveyance distance changing unit 6. As shown in fig. 2, the conveying distance changing section 6 includes movable rollers 17 and 18 that can come into surface contact with the glass film G during conveyance. In the present embodiment, both the two movable rollers 17 and 18 are disposed in the second direction changing area 9. In this case, by changing the form of the surface contact of the movable rollers 17 and 18 with the glass film G, the conveying distance of the portion of the glass film G passing through the conveying distance changing unit 6 can be changed in the width direction of the glass film G (in the present embodiment, the Y direction).

Here, as shown in fig. 3, for example, the above-described change in the form of surface contact can be achieved by rotating the movable rollers 17 and 18 about an axis A2 in a direction different from the central axis A1 of shaft rotation (for example, in a direction orthogonal to the central axis A1 of shaft rotation). Fig. 3 shows an example of the drive mechanism 19 for realizing the above-described operation (rotation about the axis A2) of the upstream first movable roller 17. The drive mechanism 19 includes bearings 20 and 20 for rotatably supporting the first movable roller 17 at both ends in the axial direction thereof, a motor 21, and a coupling portion 22 for coupling the bearings 20 and 20 to the motor 21. In this case, the rotation axis of the motor 21 coincides with the axis A2. In addition, the direction of the axis A2 coincides with the Z direction.

In the drive mechanism 19 configured as described above, when the motor 21 is driven, the bearings 20 and 20 connected to the motor 21 via the connection portion 22 and the first movable roller 17 rotate about the axis A2 in the vertical direction, which is the rotation axis of the motor 21 (see fig. 4). Therefore, in this case, the posture of the first movable roller 17 can be controlled (for example, controlled to the posture indicated by the two-dot chain line in fig. 4) by adjusting the rotation amount by the motor 21. The second movable roller 18 can also be controlled in the same manner as the first movable roller 17 by providing a drive mechanism (not shown) similar to the drive mechanism 19 shown in fig. 3.

As the material of the glass film G supplied to the manufacturing apparatus 1 having the above-described structure, silicate glass or silica glass is used, borosilicate glass, soda lime glass, aluminosilicate glass or chemically strengthened glass is preferably used, and alkali-free glass is most preferably used. Here, the alkali-free glass means glass substantially free of alkali (alkali metal oxide), specifically, glass having an alkali content of 3000ppm or less by weight. The weight ratio of the alkali component in the present invention is preferably 1000ppm or less, more preferably 500ppm or less, and most preferably 300ppm or less.

The thickness of the glass film G is 10 μm or more and 300 μm or less, preferably 30 μm or more and 200 μm or less, and most preferably 30 μm or more and 100 μm or less.

The glass film G can be formed by a known float method, rolling method, slit down-draw method, redraw method, or the like, but is preferably formed by overflow down-draw method.

Examples of the material of the protective film F to be supplied between the pair of nip rollers 15a and 15b include an organic resin film (synthetic resin film) such as an ionomer film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl alcohol film, a polyester film, a polycarbonate film, a polystyrene film, a polyacrylonitrile film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film, an ethylene-methacrylic acid copolymer film, a nylon (registered trademark) film (polyamide film), a polyimide film, and cellophane, and a polyethylene terephthalate film (PET film) is preferably used.

The thickness of the protective film F is preferably 10 μm or more and 1000 μm or less, and more preferably 20 μm or more and 500 μm or less.

A method for manufacturing a glass roll (second glass roll GR 2) using the manufacturing apparatus 1 having the above-described configuration will be described below. The method includes an unwinding step S1, a first direction changing step S2, a manufacturing-related processing step S3, a conveying speed adjusting step S4, a second direction changing step S5, a conveying distance changing step S6, a laminating step S7, and a winding step S8.

In the unwinding step S1, the glass film G is unwound from the first glass roll GR1 of the unwinding section 2 provided at a predetermined position of the manufacturing apparatus 1, and is conveyed to the manufacturing-related processing section 3 located downstream of the first glass roll GR1 by the conveyance speed adjustment section 5 and a conveyance device, not shown, as necessary. In the present embodiment, the unwinding section 2 is located in a relatively lower region, and the manufacturing-related processing section 3 is located in a relatively upper region (see fig. 1). Therefore, a first direction change region 8 is provided between the unwinding section 2 and the manufacturing-related processing section 3, and the glass film G conveyed in the upward direction (Z direction in fig. 1) is conveyed to the manufacturing-related processing section 3 while being changed in the conveyance direction to the horizontal direction (X direction in fig. 1) in the first direction change region 8 (first direction change step S2).

In the production-related processing step S3, a predetermined production-related process is performed on the glass film G passing through the production-related processing section 3. In the present embodiment, the chemical treatment apparatus 10, the surface treatment apparatus 11, and the cleaning apparatus 12 are arranged in this order from the upstream side in the conveyance direction of the glass film G. Therefore, the glass film G unwound from the first glass roll GR1 is subjected to the chemical treatment of the end surface by the chemical treatment apparatus 10, the surface treatment by the surface treatment apparatus 11, and the cleaning treatment by the cleaning apparatus 12 in this order. Further, by disposing the conveyance speed adjusting section 5 downstream of the production-related processing section 3, the conveyance speed of the glass film G passing through the production-related processing section 3 is adjusted to a predetermined level (conveyance speed adjusting step S4). This enables the glass film G to be stably subjected to the various manufacturing-related processes described above.

The glass film G subjected to the predetermined process performed by the production-related process section 3 passes through the conveyance speed adjustment section 5 and reaches the second direction change region 9. Here, the second direction change area 9 is provided with a conveyance distance changing unit 6. The conveying distance changing unit 6 has two movable rollers 17 and 18, and at least one of the two movable rollers 17 and 18 is displaced from a reference state (a state indicated by a two-dot chain line in fig. 5) to a predetermined state. In the present embodiment, as shown in fig. 5, the first movable roller 17 located on the relatively upstream side is rotated by a predetermined angle θ 1 about an axis A2 (here, Z direction) in a direction orthogonal to the central axis A1 from a state in which the central axis A1 of the rotation of the shaft coincides with the width direction (here, Y direction) of the glass film G. Further, the second movable roller 18 located on the relatively downstream side is rotated by a predetermined angle θ 2 around an axis A2 (Z direction) in a direction orthogonal to the central axis A1 from a state in which the central axis A1 of the shaft rotation coincides with the width direction (Y direction) of the glass film G. The direction of rotation at this time is set so that the conveying distance on the side (for example, the left side in fig. 5) where deformation such as wrinkles is likely to occur in the width direction of the glass film G is relatively long. In the present embodiment, as shown in fig. 2 and 5, the direction of rotation of the movable rollers 17 and 18 is set so that the conveyance distance between the one axial end sides 17a and 18a of the first and second movable rollers 17 and 18 and the one width direction Ga of the glass film G is increased.

In this way, the conveyance distance of the glass film G by the conveyance distance changing unit 6 is made different in the width direction, and thus, the deformation such as wrinkles generated in the glass film G is eliminated or suppressed. Therefore, in the second direction changing region 9, the conveyance distance changing unit 6 changes the conveyance direction of the glass film G conveyed in the horizontal direction (X direction in fig. 1) or in a slightly oblique downward direction as shown in fig. 2 to the downward direction (Z direction in fig. 1) while eliminating or suppressing deformation such as wrinkles occurring in the glass film G as described above, and conveys the glass film G to the laminating unit 7 (second direction changing step S5, conveyance distance changing step S6).

In the laminating step S7, the glass film G having reached the laminating portion 7 located on the downstream side of the movable rollers 17 and 18 is laminated with the protective film F. In the present embodiment, as shown in fig. 1 and 2, a pair of nip rollers 15a and 15b are disposed on a conveyance path of the glass film G, and the protective film F is unwound from the protective film roll FR disposed in the vicinity of the pair of nip rollers 15a and 15b and supplied between the pair of nip rollers 15a and 15 b. Here, since the protective film F is integrally provided with an adhesive layer (not shown), the glass film G and the protective film F are sandwiched between the pair of nip rollers 15a and 15b, and the protective film F is attached to the glass film G via the adhesive layer. Thereby, a laminated film GF in which the glass film G and the protective film F are laminated is obtained. In addition, in the upstream-side conveying distance changing step S6, since deformation such as wrinkles occurring in the glass film G is eliminated or suppressed, the flat glass film G can be stably attached to the protective film F.

In the next winding step S8, the laminated film GF obtained in the laminating step S7 is wound around the core 13 to obtain a second glass roll GR2. In the present embodiment, the second glass roll GR2 is shipped as a final product glass roll.

As described above, in the method for manufacturing a glass roll (second glass roll GR 2) according to the present embodiment, the conveyance distance changing unit 6 capable of changing the conveyance distance of the glass film G in the width direction of the glass film G is provided between the conveyance speed adjusting unit 5 and the winding unit 4. With this configuration, the conveying distance of the glass film G can be made different in the width direction with respect to the glass film G that has passed through the conveying speed adjusting section 5 and reached the conveying distance changing section 6 (see fig. 5). Therefore, for example, when the first side Ga in the width direction of the glass film G is deformed such as wrinkled and tends to expand, the conveyance distance of the first side Ga in the width direction of the glass film G is made longer than the conveyance distance of the second side Gb in the width direction of the glass film G, whereby the deformation such as wrinkled of the first side Ga in the width direction can be eliminated or reduced. Therefore, it is possible to prevent the deformation such as wrinkles from accumulating and becoming large. Therefore, by winding the glass film G (the laminated film GF in the present embodiment) in this state, breakage at the time of winding can be prevented, and a high-quality glass roll (the second glass roll GR 2) can be stably obtained.

In the present embodiment, a laminating section 7 that is laminated by sticking the protective film F is provided between the conveying speed adjusting section 5 and the winding section 4, and a conveying distance changing section 6 is provided between the conveying speed adjusting section 5 and the laminating section 7. As in the present embodiment, when the glass film G and the protective film F are laminated while being sandwiched between the pair of nip rollers 15a and 15b, the glass film G is blocked at the position sandwiched between the pair of nip rollers 15a and 15 b. When the conveyance speed adjustment portion 5 is the belt conveyor 14 capable of suction, since the glass film G is in a blocked state on the belt conveyor 14 as described above, when the pair of nip rollers 15a and 15b are disposed between the belt conveyor 14 and the winding portion 4, the distance between the areas of the glass film G blocked at two different locations becomes short, and deformation such as wrinkles is likely to occur, and the glass film G may be enlarged. Further, since the conveyance distance to the glass film G to be blocked next time is short, there is little possibility that deformation such as wrinkles occurring temporarily is eliminated or suppressed. In contrast, according to the method for manufacturing a glass roll (second glass roll GR 2) of the present embodiment, deformation such as wrinkles occurring during conveyance of the glass film G can be eliminated or suppressed by the conveyance distance changing unit 6, and the glass film G can be accurately wound in a roll shape without being damaged. Therefore, even when the conveying speed adjusting section 5 and the laminating section 7 are disposed at positions close to each other as in the present embodiment, it is possible to perform the manufacturing-related processing on the glass film G with high accuracy without fear of deformation such as wrinkles.

The first embodiment of the method and apparatus for manufacturing a glass roll according to the present invention has been described above, but it goes without saying that the method and apparatus can be adopted in any form within the scope of the present invention.

For example, in the first embodiment, the conveying distance changing unit 6 is configured by two movable rollers 17 and 18, and the driving mechanism 19 is configured to rotate the movable rollers 17 and 18 about the axis A2 in the vertical direction. In the case of adopting such a configuration, the case where the adjustment is performed such that the one axial end sides 17a and 18a of the movable rollers 17 and 18 are brought into large contact with the one width direction Ga of the glass film G by rotating both the movable rollers 17 and 18 in the same direction is exemplified, but the contact form of the movable rollers 17 and 18 with the glass film G is not limited to this, as a matter of course. For example, as shown in fig. 6, adjustment can be achieved in which the upstream first movable roller 17 is rotated in the same direction as in fig. 5, and the downstream second movable roller 18 is rotated in the opposite direction to the first movable roller 17. In this case, one axial end side 17a of the first movable roller 17 is in relatively large contact with one width direction side Ga of the glass film G, and the other axial end side 18b of the second movable roller 18 is in relatively large contact with the other width direction side Gb of the glass film G. Therefore, in this case, the conveyance distance of the glass film G is relatively increased at one side Ga in the width direction which is in contact with the one end side 17a in the axial direction of the first movable roller 17, and the conveyance distance is relatively increased at the other side Gb in the width direction which is in contact with the other end side 18b in the axial direction of the second movable roller 18. In this way, the conveyance distance changing unit 6 is configured by two or more movable rollers 17 and 18, and thus the conveyance distance of the glass film G can be finely adjusted. Therefore, the conveying distance can be adjusted with higher accuracy than adjusting the conveying distance with only one movable roller 17 (18).

In the above embodiment, the case where the two movable rollers 17 and 18 are configured to be rotatable about the axis line A2 in the vertical direction orthogonal to the center axis line A1 about which the rollers rotate is exemplified, but it is needless to say that other movable systems may be employed. Fig. 7 is a plan view of a main part of the conveyance distance changing unit 30 (second embodiment of the present invention). As shown in fig. 7, the conveying distance changing unit 30 of the present embodiment is different from the driving mechanism of the first embodiment in the driving mechanism 32 of the movable roller 31. That is, the drive mechanism 32 is different from the drive mechanism 19 of the first embodiment in that bearings 33a and 33b provided at both ends of the movable roller 31 in the axial direction are configured to be slidable along the longitudinal direction of the slide guides 34a and 34 b. In this case, the bearings 33a and 33b also function as sliding portions with respect to the slide guides 34a and 34b, respectively. Here, the mechanism for allowing the bearings 33a and 33b to slide with respect to the slide guides 34a and 34b is arbitrary, and a known linear motion mechanism such as a linear motor or a rack and pinion mechanism can be used. In fig. 7, only one movable roller 31 is disclosed, but actually, the conveying distance changing unit 30 is configured by two movable rollers 31 and 31.

By configuring the drive mechanism 32 of the movable roller 31 in this manner, the degree of freedom in the position of the movable roller 31 can be improved as compared with the first embodiment. Therefore, the contact manner with the glass film G can be set more widely, and the conveying distance can be changed more flexibly in the width direction.

The adjustment of the movable rollers 17, 18, and 31 can be performed at any timing. For example, the size (width direction size, thickness size), material, and the like of the glass film G to be conveyed may be changed according to the change. Alternatively, the conveyance may be performed while the glass film G is actually being conveyed (in the case of temporary stop).

The number of movable rollers 17 and 18 (31) is not limited to two. The conveying distance changing unit 6 (30) may be constituted by one movable roller 17 (18, 31), or the conveying distance changing unit 6 may be constituted by three or more movable rollers.

In the above embodiment, the case where the conveyance distance changing unit 6 is provided in the second direction change area 9 and the movable rollers 17 and 18 (31) also serve as the guide rollers for direction change has been described as an example, but the present invention is not limited to this. For example, the movable rollers 17 and 18 (31) may be disposed in front of and behind the second direction changing region 9 in the conveying direction so as to be in surface contact with the glass film G.

In the above description, the movable rollers 17 and 18 (31) are provided as the conveyance distance changing unit 6 (30), but the present invention is not limited to this. Any configuration can be adopted as long as the conveying distance can be changed in the width direction of the glass film G by some action on the glass film G. Therefore, for example, the conveying distance changing unit may be configured by a movable surface contact unit in a form other than a roller.

Description of the reference numerals

1. Glass roll manufacturing device

2. Unwinding part

3. Manufacturing-related processing unit

4. Winding part

5. Conveying speed adjusting part

6. Conveying distance changing part

7. Laminated part

8. First direction change region

9. Second direction change region

10. Chemical processing apparatus

11. Surface treatment device

12. Cleaning device

13. Roll core

14. Belt conveyor

15a, 15b nip roll

16. Roll core

17. 18 movable roller

19. Driving mechanism

20. 20 bearing

21. Motor with a stator having a stator core

22. Connecting part

30. Conveying distance changing part

31. Movable roller

32. Driving mechanism

33a, 33b bearing (sliding part)

34a, 34b slide guide

A1 Central axis (Movable roller)

A2 Vertical axis (Movable roller)

F protective film

FR protective film roll

G glass film

GF laminated film

GR1 first glass roll

GR2 second roll of glass.

Claims (8)

1. A method for manufacturing a glass roll, wherein a strip-shaped glass film is unwound by an unwinding section, the unwound glass film is wound by a winding section to obtain a glass roll,

the method for manufacturing the glass roll is characterized in that,

a conveying speed adjusting part for adjusting the conveying speed of the glass film unwound by the unwinding part when the glass film is conveyed to the winding part is arranged between the unwinding part and the winding part,

a conveying distance changing unit capable of changing a conveying distance of the glass film in a width direction of the glass film is provided between the conveying speed adjusting unit and the winding unit.

2. The method for manufacturing a glass roll according to claim 1,

a processing unit related to the production of the glass film is provided between the unwinding unit and the conveying speed adjusting unit.

3. The method for manufacturing a glass roll according to claim 1 or 2,

a laminating part for laminating a protective film on the glass film by attaching the protective film to the glass film via an adhesive layer is provided between the conveying speed adjusting part and the winding part,

the conveying distance changing unit is provided between the conveying speed adjusting unit and the stacking unit.

4. The method for manufacturing a glass roll according to any one of claims 1 to 3,

the conveying distance changing unit is configured to be capable of changing a conveying distance of the glass film at an end portion in a width direction of the glass film.

5. The method for manufacturing a glass roll according to any one of claims 1 to 4,

the conveying distance changing part is arranged at a plurality of different positions in the conveying direction of the glass film.

6. The method for manufacturing a glass roll according to any one of claims 1 to 5,

the conveying speed adjusting part is arranged in a relatively upper area, the winding part is arranged in a relatively lower area, a conveying direction changing area for changing the conveying direction of the glass film passing through the conveying speed adjusting part is arranged between the conveying speed adjusting part and the winding part,

the conveying distance changing part is arranged in the conveying direction changing area.

7. The method for manufacturing a glass roll according to any one of claims 1 to 6,

the conveying distance changing unit includes a roller capable of contacting the surface of the glass film,

the roller is configured to be rotatable about an axis orthogonal to a rotation axis of the roller.

8. A glass roll manufacturing apparatus includes: a unwinding section that unwinds a belt-shaped glass film; a winding unit configured to wind the unwound glass film to obtain a glass roll; and a conveying speed adjusting part which is arranged between the unwinding part and the winding part and adjusts a conveying speed when the glass film unwound by the unwinding part is conveyed toward the winding part,

the manufacturing device of the glass roll is characterized in that,

a conveying distance changing unit capable of changing a conveying distance of the glass film in a width direction of the glass film is provided between the conveying speed adjusting unit and the winding unit.

Images