JP7177386B2 - Glass film manufacturing method - Google Patents

Description

The present invention relates to a glass film manufacturing method, and more particularly to a manufacturing method including a step of correcting deviation of an actual passing route from the original transport route while transporting a band-shaped glass film that is the source of the glass film.

Mobile terminals such as smartphones and tablets, which have rapidly spread in recent years, are required to be thin and lightweight. . Under such circumstances, a glass plate called a glass film which is thinned into a film shape (for example, a thickness of 300 μm or less) has been developed and manufactured.

In the glass film manufacturing process, a roll-to-roll system is often used to perform various treatments on the strip glass film while transporting the strip glass film, which is the base of the product glass film. For example, a band-shaped glass film being transported may be subjected to processes such as cutting parts that are not required for the product, cleaning the front and back surfaces, and inspecting for defects.

By the way, when the strip glass film is transported, meandering or skewing occurs in the strip glass film in the middle of the transport route, and there is a deviation between the original transport route and the passage route through which the strip glass film actually passes. may occur. Such problems become more likely to occur as the number of treatments applied to the strip glass film increases. This is due to the increase in the number of rollers, conveyors, etc., due to the increase in the number of rollers, conveyors, etc., due to the increase in the length of the conveying route of the strip glass film.

Here, Patent Document 1 discloses a method that can be used to correct the deviation. This method is a method for correcting the deviation of the actual passage path from the original transport path when the web (belt-shaped thin plate) is transported, and the following correction mechanism is used to correct the deviation.

The correcting mechanism includes a pair of upper surface contact rollers (rollers 53 and 56 in the same document) that are arranged with a gap on the upstream side and the downstream side on the web conveying path, each contacting the upper surface of the web, and the conveying path. a pair of lower surface contact rollers (id. rollers 54, 55) disposed above and between the pair of upper surface contact rollers, each contacting the lower surface of the web. In other words, in this mechanism, a total of four rollers are arranged along the conveying path in the following order: the upper surface contact roller on the upstream side, the lower surface contact roller on the upstream side, the lower surface contact roller on the downstream side, and the upper surface contact roller on the downstream side. ing. The pair of bottom surface contact rollers is positioned higher than the pair of top surface contact rollers, and the upstream bottom surface contact roller and the downstream bottom surface contact roller are respectively the upstream top surface contact roller and the downstream surface contact roller. It is placed almost directly above the roller.

Due to the arrangement relationship described above, the web passing through the positions where these four rollers are arranged changes its traveling direction in sequence as follows. First, the web that has reached the upper surface contact roller on the upstream side as it is conveyed changes its traveling direction from the horizontal direction to the upward direction along the roller. Next, when it reaches the lower surface contact roller on the upstream side, the traveling direction is changed from the upward direction to the horizontal direction again along the roller. After that, when it reaches the lower surface contact roller on the downstream side, the traveling direction is changed from the horizontal direction to the downward direction along the roller. Finally, when reaching the upper surface contact roller on the downstream side, the traveling direction is changed from the downward direction to the horizontal direction again along the roller.

Both ends of the pair of lower surface contact rollers are connected by connecting bars (connecting bars 57 and 58 in the same document). Both the rollers and the connecting bar rotate integrally around a rotation axis that extends in the vertical direction, so that they can swing. In this mechanism, the rotation axis is positioned so as to pass through the central portion of the lower surface contact roller on the upstream side. Then, the deviation is corrected as the rollers and the connecting bar swing.

JP 2011-42459 A

However, when the method disclosed in Patent Document 1 is used, there are the following problems to be solved.

That is, in this method, it is necessary to bring the web into contact with the surface of the lower surface contact roller to the extent that slippage does not occur between the web and the lower surface contact roller when correcting the misalignment. It is essential to change the traveling direction to a substantially right angle, and it is necessary to bend the web with a large curvature at each change. Therefore, when the above-mentioned method is used when conveying the strip glass film, the strip glass film may be damaged due to the stress generated by the bending when changing the traveling direction. Under such circumstances, it has been expected to establish a technique that can correct the deviation without damaging the strip glass film.

The present invention, which has been devised in view of the above circumstances, provides a technical solution to prevent breakage of the strip of glass film when correcting the deviation of the actual passing route from the original transport route when transporting the strip of glass. Make it an issue.

The present invention for solving the above-mentioned problems is manufacturing a glass film including a correcting step of correcting deviation of an actual passing route from an original conveying route of the strip of glass film by a correcting mechanism while conveying the strip of glass film. In the method, the correcting mechanism is provided with a conveying unit that conveys the strip-shaped glass film in a state of being fixed and held on a conveying surface, and the conveying unit changes the conveying route of the strip-shaped glass film to perform the correcting step. Characterized by

In this method, the conveying section provided in the correction mechanism can convey the band-shaped glass film while fixing and holding it on the conveying surface. Then, the conveying unit in this state changes the conveying route of the band-shaped glass film, thereby correcting the deviation of the actual passing route from the original conveying route of the band-shaped glass film and completing the correction process. Thus, the present method advantageously eliminates the need to bend the glass ribbon film with a large curvature to correct for misalignment. As a result, it is possible to inevitably prevent the strip glass film from being damaged by the stress generated by the bending. As described above, according to the present method, it is possible to prevent breakage of the strip-shaped glass film when correcting the deviation of the actual passage route from the original transport route when transporting the strip-shaped glass film. .

In the above method, the first transport mechanism arranged adjacent to the upstream side of the transport path with respect to the correction mechanism and the second transport mechanism arranged adjacent to the downstream side of the transport path are provided, and the transport surface of the transport unit; It is preferable that the transport surfaces of both the first transport mechanism and the second transport mechanism are positioned on the same surface side of the strip glass film.

In this way, one of the front and back surfaces of the band-shaped glass film can reliably avoid contact with the transport surface of the transport unit, the transport surface of the first transport mechanism, and the transport surface of the second transport mechanism. . Therefore, if one side of the band-shaped glass film is used as a guarantee surface and the guarantee surface is made to avoid contact with each conveying surface, it is possible to prevent the guarantee surface from being damaged as much as possible, and the band-shaped glass film is returned to the original state. It is advantageous in improving the quality of glass film products manufactured in.

In the above method, the correcting mechanism, the first transport mechanism, and the second transport mechanism are arranged in a section in which the strip glass film is transported in a flat posture on the transport path, and the transport surface of the transport unit and the first It is preferable to position the transport surfaces of both the transport mechanism and the second transport mechanism at the same height.

In this way, when the strip glass film is transferred from the first transport mechanism to the transport section of the correction mechanism, and when it is transferred from the transport section of the correction mechanism to the second transport mechanism, the curvature of the strip glass film is prevented. can be avoided as much as possible. Therefore, it is more advantageous in preventing breakage of the band-shaped glass film due to curving.

In the above method, it is preferable to use, as the conveying section, a suction conveyer that conveys the band-shaped glass film in a state of being sucked.

In this way, it becomes easy to secure a sufficient contact area between the conveying surface of the conveying unit (conveying surface of the suction conveyor) and the main surface (one of the front and back surfaces) of the strip glass film, and the strip glass film is preferably transported. It can be fixedly held on the surface, and thus the correction process can be carried out more reliably. Furthermore, it is also possible to smoothly convey the band-shaped glass film while reliably performing the repairing process.

In the above method, it is preferable to change the feed path by swinging the suction conveyor around a rotation axis extending perpendicularly to the conveying surface of the suction conveyor.

In this way, the conveying route of the band-shaped glass film by the conveying section can be changed in accordance with the oscillation of the suction conveyor, and the conveying route can be changed very easily and reliably.

In the above method, the axis of rotation is preferably located at the upstream end of the suction conveyor in the feeding direction.

With this arrangement, the axis of rotation is positioned at the upstream end of the suction conveyor in the feeding direction, so that the conveying surface of the suction conveyor moves along the width direction of the band-shaped glass film as the suction conveyor swings. The width of the runout at the time of feeding becomes smaller toward the upstream side in the feeding direction. For this reason, it is possible to avoid the occurrence of a situation in which the direction of travel of the strip-shaped glass film transferred from the first transport mechanism to the suction conveyor is abruptly changed after being transferred. Therefore, the load applied to the strip glass film can be reduced, and it is possible to prevent the breakage of the strip glass film more reliably.

In the above method, it is preferable to position the axis of rotation in the center of the adsorption conveyor in the direction along the width direction of the strip glass film.

In this way, when the deviation of the actual passing path from the original transport path of the strip glass film deviates to one side in the width direction of the strip glass film or to the other side, Also, it is possible to suitably deal with it.

In the above method, a detector is provided upstream of the transport path with respect to the correcting mechanism to detect the widthwise deviation of the edge of the strip glass film in the width direction, and the transport path is adjusted based on the detection result of the detector. preferably changed.

In this way, the degree of displacement occurring in the strip of glass film can be accurately detected, and the conveying route of the strip of glass film by the conveying unit is changed based on the detection result. can be dealt with.

Advantageous Effects of Invention According to the present invention, it is possible to prevent breakage of the strip-shaped glass film when correcting the deviation of the actual passing route from the original transport route when transporting the strip-shaped glass film.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the outline of the manufacturing method of the glass film which concerns on 1st embodiment of this invention. It is a top view which shows the correction mechanism used for the manufacturing method of the glass film which concerns on 1st embodiment of this invention. (a) is a side view which shows the correction mechanism used for the manufacturing method of the glass film which concerns on 1st embodiment of this invention, (b) is a top view. It is a top view which shows the correction process in the manufacturing method of the glass film which concerns on 1st embodiment of this invention. It is a side view which shows the outline of the manufacturing method of the glass film which concerns on 2nd embodiment of this invention. It is a side view which shows the outline of the manufacturing method of the glass film which concerns on 3rd embodiment of this invention.

Hereinafter, a method for manufacturing a glass film according to an embodiment of the present invention will be described with reference to the accompanying drawings.

<First embodiment>
As shown in FIG. 1, in the method for manufacturing a glass film according to the first embodiment, a roll-to-roll system is used to transfer a band-shaped glass film 1, which is the source of the glass film, to a plurality of conveying rollers 2 and suction. It is conveyed along the longitudinal direction by the conveyor 3 .

Then, for the strip glass film 1, an unwinding process P1, a cutting process P2, a cleaning process P3, a rinsing process P4, a liquid draining process P5, a drying process P6, a repairing process P7, and an inspection process P8 are carried out in order from the upstream side of the conveying path. , the winding step P9 is executed. Among these processes, each process from the cutting process P2 to the inspection process P8 is performed in a section in which the strip glass film 1 is transported in a flat posture (horizontal posture) on the transport route.

The strip glass film 1 is formed to have a thickness of 300 μm or less and has flexibility. In this band-shaped glass film 1, the surface 1a (upper surface), which is out of contact with the conveying roller 2 and the suction conveyor 3 during transportation, is the guaranteed surface, and the back surface 1b (lower surface), which is in contact with both 2 and 3, is the non-guaranteed surface. be. In addition, before the cutting step P2, the band-shaped glass film 1 has an effective portion 1x, which will later become a product, in the central portion in the width direction, and an unnecessary portion 1y, which is not necessary for the product, at both ends in the width direction. have in

In this embodiment, the plurality of transport rollers 2 are mixed with drive rollers and free rollers. The number of drive rollers included in the plurality of transport rollers 2 may be appropriately increased or decreased according to the conditions for transporting the band-shaped glass film 1 . As a modified example of the present embodiment, a plurality of conveyers may be used to convey the band-shaped glass film 1 instead of the plurality of conveying rollers 2 .

The unwinding process P<b>1 is a process of unwinding the strip glass film 1 from the first glass roll 4 .

In the unwinding step P1, the strip glass film 1 and the strip protection strip are extracted from the first glass roll 4 wound around the winding core 6 in a state in which the strip glass film 1 and the strip protection sheet 5 are superimposed on each other. As the sheet 5 is continuously unwound, both 1 and 5 are separated from each other. The strip glass film 1 after separation is sent to the cutting step P2 on the downstream side of the conveying path. On the other hand, the band-shaped protective sheet 5 after separation is wound again into a roll shape to form a first sheet roll 7 .

Immediately downstream of the first glass roll 4 on the conveying path, a first detector 8 is arranged to detect the position of the edge in the width direction of the strip glass film 1 being conveyed. When the position of the end in the width direction detected by the first detector 8 deviates to one side in the width direction beyond the allowable range, the winding core 6 moves to the other side in the width direction to correct the deviation. .

The cutting step P2 is a step of cutting the strip glass film 1 unwound in the unwinding step P1 along the longitudinal direction by a laser cutting method to cut the unnecessary portion 1y from the strip glass film 1 .

In the cutting step P2, a cutter 9 arranged above the conveying path irradiates the laser L along the boundary line between the effective portion 1x and the unnecessary portion 1y of the strip glass film 1, and heats the film along with the irradiation. Coolant C (for example, mist water) is jetted toward the location. As a result, the band-shaped glass film 1 is continuously cut to separate the unnecessary portion 1y. The unnecessary portion 1y after the division is removed from the conveying path and discarded. As a modified example of this embodiment, cutting may be performed by a laser fusion cutting method instead of the laser cutting method. After execution of the cutting step P2, the strip glass film 1 consisting of only the effective portion 1x is sent to the downstream side of the transport path.

The cleaning step P3 is a step of cleaning the front and rear surfaces 1a and 1b of the strip glass film 1 (effective portion 1x) after the cutting step P2 with a cleaning liquid and the brush roller .

In the cleaning process P3, for example, pure water or water mixed with a detergent is used as the cleaning liquid. The cleaning liquid is supplied to front and back surfaces 1a and 1b from a plurality of supply nozzles 11 arranged along the transport path on each of the front surface 1a side and the back surface 1b side of the band-shaped glass film 1 . The brush rollers 10 are arranged in pairs (two pairs in this embodiment) with the strip glass film 1 sandwiched in the thickness direction, and the entire width of the front surface 1a and the back surface 1b of the strip glass film 1 is covered with rotation. wash.

The rinsing step P4 is a step of rinsing the front and rear surfaces 1a and 1b of the band-shaped glass film 1 washed in the washing step P3 with a rinsing liquid.

In the rinsing process P4, for example, pure water or the like is used as a rinse liquid. The rinsing liquid is supplied to the front and rear surfaces 1a and 1b from the supply nozzles 12 arranged along the transport path on each of the front surface 1a side and the rear surface 1b side of the band-shaped glass film 1 in the same manner as in the cleaning step P3.

The liquid draining process P5 is a process for draining the residual cleaning liquid or rinse liquid from the band-shaped glass film 1 after the rinsing process P4 by jetting gas.

In the draining step P5, on each of the front surface 1a side and the rear surface 1b side of the band-shaped glass film 1, gas (for example, air) is directed toward the front surface 1a and the rear surface 1b from an air knife 13 arranged along the transport path. Inject. As a result, the cleaning liquid and rinsing liquid remaining on the front and back surfaces 1a and 1b of the strip glass film 1 are removed by the pressure of the gas.

The drying step P6 is a step of drying the belt-shaped glass film 1 drained in the draining step P5.

In the drying step P6, the front and back surfaces 1a and 1b of the strip glass film 1 are dried by the dryers 14 arranged along the transport path on the front surface 1a side and the back surface 1b side of the strip glass film 1, respectively.

The correction mechanism 15 having the suction conveyor 3 and the second detector 16 arranged immediately upstream of the suction conveyor 3 on the transport path are used to perform the correction step P7.

As shown in FIG. 2, the suction conveyor 3 includes a belt 3a formed with a large number of holes 3x for suction. It is possible to convey the belt-shaped glass film 1 in a state where it is adsorbed on the surface of 3a. As a result, the suction conveyor 3 functions as a conveying section that conveys the strip-shaped glass film 1 while fixing and holding it on the conveying surface (in this embodiment, the surface of the belt 3a).

Here, the adsorption conveyor 3 may adsorb only a partial region in the width direction of the strip glass film 1 as in the present embodiment, or as a modification of the present embodiment, the strip glass film 1 It may be one that adsorbs the entire width in the width direction of the.

Conveying surfaces of the sucking conveyor 3, the conveying roller 2a as the first conveying mechanism adjacent to the upstream side of the sucking conveyor 3 on the conveying path, and the conveying roller 2b as the second conveying mechanism adjacent to the downstream side. are located at the same height. In addition, these three conveying surfaces are located on the same surface side of the band-shaped glass film 1 (back surface 1b side). The conveying surfaces of the conveying rollers 2a and 2b are the tops of the outer peripheral surfaces of these rollers.

The suction conveyor 3 can swing about a rotation axis Z extending vertically (in this embodiment, vertically) with respect to the conveying surface, as indicated by the white arrow in FIG. be. Along with this swinging motion, the conveying path S of the band-shaped glass film 1 by the suction conveyor 3 changes. The rotation axis Z is positioned at the upstream end of the suction conveyor 3 in the feed direction and at the center of the strip glass film 1 in the width direction.

Here, as a modification of the present embodiment, the position of the rotation axis Z may be changed along the conveying path of the band-shaped glass film 1 . As an example, instead of the upstream end of the suction conveyor 3 in the feeding direction, which is the position in the present embodiment, the rotation axis Z may be positioned at the center in the feeding direction (the center of the conveying surface of the suction conveyor 3). good. Further, the rotation axis Z may be positioned upstream of the suction conveyor 3 .

The suction conveyor 3 is capable of swinging by the same angle θ on one side and the other side in the width direction of the strip glass film 1 . Of course, as a modification of the present embodiment, the angle θ may be different between one width direction side and the other width direction side. The angle θ is preferably 1.0° or less, more preferably 0.5° or less, and most preferably 0.1° or less. Further, the dimension D shown in FIG. 2 is equal to the distance by which the strip glass film 1 shifts in the width direction before and after the attraction conveyor 3 passes when the attraction conveyor 3 swings by the angle θ. , the dimension D is preferably 10.0 mm or less, more preferably 5.0 mm or less, and most preferably 1.0 mm or less.

As shown in FIGS. 3A and 3B, the correction mechanism 15 includes a base 17 on which a guide rail 17a is installed, a rod 18 fixed to the base 17 while extending vertically, and a guide rail. It has a guide 19a that moves along 17a, and a rocking member 19 that rocks around a rod 18 as the guide 19a moves. These elements realize the swinging motion of the suction conveyor 3 .

The base 17 supports the swinging member 19 from below and is formed to be one size larger than the swinging member 19 in plan view. Therefore, even when the swinging member 19 swings, the swinging member 19 does not protrude from the base 17, as indicated by the white arrow in FIG. 3(b). The guide rail 17a forms an arc centered on the rod 18 in plan view.

The rod 18 is fixed to the base 17 by a fixing mechanism (for example, a screw mechanism or the like) (not shown). This rod 18 is positioned directly below the upstream end of the suction conveyor 3 in the feed direction, and the central axis of the rod 18 coincides with the rotation axis Z. As shown in FIG.

The rocking member 19 is formed with a through-hole 19b into which the rod 18 is fitted. Further, the swinging member 19 supports the suction conveyor 3 from below through a connecting member 20 (illustration of both 3 and 20 is omitted in FIG. 3(b)). As a result, when the guide 19a moves along the guide rail 17a, the swinging member 19 swings, and the suction conveyor 3 supported by the swinging member 19 swings.

As shown in FIG. 2, the second detector 16 is located between the transport roller 2a and the suction conveyor 3 on the transport path (the location indicated by the circle T in FIG. 2). It is possible to detect the deviation in the width direction of the width direction end of the . Then, based on the result of detection by the second detector 16, if the deviation exceeds the allowable range, the adsorption conveyor 3 is caused to swing to correct the deviation, and the belt-shaped glass film 1 is detected by the adsorption conveyor 3. It is configured to change the feeding route S of the.

Here, as a modification of the present embodiment, the position at which the second detector 16 detects the deviation of the widthwise end may be changed. As an example, the widthwise deviation of the widthwise end of the band glass film 1 may be detected between the suction conveyor 3 and the conveying roller 2b on the conveying path.

As shown in FIG. 4, the correction step P7 is a step of correcting deviation of the actual passing route R2 from the original transport route R1 of the strip glass film 1 while transporting the strip glass film 1. The “original conveying route R1” means a route through which the strip of glass film 1 passes when no meandering or skewing occurs in the strip of glass film 1 being transported.

A specific flow for executing the correction process P7 will be described below. In the correction step P7, as a result of meandering or skewing of the strip glass film 1 being conveyed, a deviation occurs between the two routes R1 and R2, and along with this, the ends of the strip glass film 1 in the width direction are deformed. Do this only if the widthwise deviation exceeds the allowable range. That is, if meandering or skewing does not occur at all, or if deviation in the width direction of the width direction end portion is within the allowable range even if it does occur, the correction step P7 is not performed. Here, the above allowable range may be set arbitrarily.

First, when the belt-shaped glass film 1 is not meandering or skewed at all and the belt-shaped glass film 1 passes through the original transport route R1 (the original transport route R1 and the actual passing route R2 are the same). match), the suction conveyor 3 does not swing. Therefore, the conveying path S of the band-shaped glass film 1 by the suction conveyor 3 is parallel to the original conveying path R1, as indicated by the two-dot chain line in FIG.

After that, it is assumed that the belt-shaped glass film 1 is meandering or skewed, and the actual passage route R2 is deviated from the original transport route R1 of the belt-shaped glass film 1 . Even in this case, if the deviation in the width direction of the widthwise ends of the strip of glass film 1 is within the permissible range, the feed path S of the strip of glass film 1 by the suction conveyor 3 is still the two-dot chain line in FIG. , it is maintained parallel to the original transport route R1.

After that, it is assumed that meandering or skewing of the band-shaped glass film 1 worsens, and the deviation in the width direction of the width direction ends exceeds the allowable range. In this case, the correction step P7 is executed to cause the suction conveyor 3 to swing. This corrects the deviation of the actual passing route R2 from the original conveying route R1 of the strip glass film 1 . Specifically, when the deviation of the widthwise end to one side in the width direction exceeds the allowable range, the suction conveyor 3 swings to the other side in the width direction. Then, the feed path S of the band-shaped glass film 1 is changed so as to be inclined toward the other side in the width direction, as indicated by the solid line in FIG. This gradually corrects the deviation.

Finally, as a result of performing the correction step P7, if the deviation in the width direction of the width direction edge of the band glass film 1 recovers to within the allowable range, the suction conveyor 3 changes the feeding path S of the band glass film 1. It is returned to a state parallel to the original conveying route R1. In addition, when the deviation in the width direction of the edge in the width direction again exceeds the allowable range due to meandering or skewing of the band-shaped glass film 1, the correction step P7 is performed again in the same manner.

Here, as a modification of the present embodiment, a plurality of correction mechanisms 15 (suction conveyors 3) and second detectors 16 are arranged on the conveying route, and the correcting process P7 is executed at a plurality of locations on the conveying route. may

As shown in FIG. 1, the inspection process P8 is a process for inspecting the presence or absence of defects in the band-shaped glass film 1 (such as foreign matter mixed in the band-shaped glass film 1).

In the inspection process P8, the presence or absence of defects is continuously inspected while passing the band-shaped glass film 1 through the field of view of the camera 21 arranged above the transport path.

The winding process P<b>9 is a process of winding the strip glass film 1 after inspection into a second glass roll 22 .

In the winding step P9, the band-shaped glass film 1 after inspection and the band-shaped protective sheet 24 unwound from the second sheet roll 23 are continuously wound around the core 25 in a state of being superimposed on each other. Thus, the second glass roll 22 is obtained.

In the winding process P9, the winding slippage prevention mechanism (not shown) prevents the strip glass film 1 wound around the core 25 from slipping. This misalignment prevention mechanism can move the winding core 25 along the width direction of the band-shaped glass film 1 . The mechanism is equipped with a detector (not shown) that moves together with the movement of the winding core 25, and this detector detects the position of the edge in the width direction of the strip glass film 1 to be wound. ing. When the position of the end in the width direction detected by the detector is shifted to one side in the width direction beyond the allowable range, the winding core 25 moves to one side in the width direction (shifted side) in accordance with the shift. By doing so, it is possible to prevent winding misalignment.

The main actions and effects of the above glass film manufacturing method will be described below.

In the manufacturing method described above, the suction conveyor 3 can convey the band-shaped glass film 1 while it is adhered to the conveying surface. In this state, the suction conveyor 3 changes the feed path S of the strip glass film 1, thereby correcting the deviation of the actual passage route R2 of the strip glass film 1 from the original transport route R1. As described above, it is possible to suitably eliminate the necessity of curving the strip glass film 1 with a large curvature when correcting the deviation, thereby preventing the occurrence of a situation in which the strip glass film 1 is damaged.

Hereinafter, a method for manufacturing a glass film according to another embodiment of the present invention will be described. In the description of other embodiments, elements that are substantially the same as the elements already described in the above-described first embodiment are duplicated by attaching the same reference numerals to the drawings referred to in the description of other embodiments. Explanation is omitted, and only differences from the first embodiment will be explained.

<Second embodiment>
As shown in FIG. 5, the method for manufacturing a glass film according to the second embodiment differs from the above-described first embodiment in that the correction mechanism 15 (adsorption conveyor 3) is used as a reference on the conveying route, and The point is that the slope is upward on the side and the slope is downward on the downstream side. As a result, the conveying surface of the suction conveyor 3 is positioned higher than the conveying surfaces of the conveying rollers 2a and 2b. In FIG. 5, illustration of elements other than the elements used for executing the repair process P7 is partially omitted.

<Third embodiment>
As shown in FIG. 6, the method for manufacturing a glass film according to the third embodiment differs from the above-described first embodiment in that the upstream side of the conveying path with respect to the correcting mechanism 15 has an upward slope, and the downstream side has an upward slope. and a suction roller 26 is arranged as a conveying unit in place of the suction conveyor 3 . Note that FIG. 6 omits some of the elements other than the elements used for executing the correction process P7.

The suction roller 26 has a rotating shaft extending in a direction along the width direction of the strip glass film 1 and has a large number of suction holes (not shown) formed on the outer peripheral surface. The suction roller 26 can convey the band-shaped glass film 1 in a state in which it is adsorbed on its outer peripheral surface as a negative pressure generating mechanism arranged inside operates.

The suction roller 26 is capable of swinging around a rotational axis Z extending vertically (in this embodiment, extending vertically) with respect to the conveying surface (the top of the outer peripheral surface of the suction roller 26). . The feeding path S of the band-shaped glass film 1 by the suction roller 26 changes with the swinging motion.

Here, the method for producing a glass film according to the present invention is not limited to the aspects described in the above embodiments. For example, in the above-described embodiment, the repairing process is carried out using a roll-to-roll system to convey the band-shaped glass film, but this is not the only option. For example, the repairing step may be performed in a mode in which a strip of glass film formed by a down-draw method (eg, an overflow down-draw method) is transported and then wound into a roll to form a glass roll.

In addition, in the first embodiment and the second embodiment described above, a suction conveyor is used as the transport section, and in the third embodiment, a suction roller is used as the transport section, but the present invention is not limited to this. . Nip rollers may be used as the conveying unit for conveying the strip-shaped glass film while sandwiching it from both sides. Then, the correction process may be performed by changing the feed path of the band-shaped glass film by the nip rollers.

Furthermore, in each of the above-described embodiments, the suction conveyor or the suction roller is caused to swing to change the conveying path of the band-shaped glass film, but this is not the only option. For example, the conveying path of the strip glass film may be changed by moving a suction conveyor or a suction roller in a direction along the width direction of the strip glass film.

1 belt-shaped glass film 2a transport roller 2b transport roller 3 adsorption conveyor 15 correction mechanism 16 second detector P7 correction process R1 original transport route R2 actual passage route S feed route Z rotation axis

Claims (6)

A glass film manufacturing method comprising a correcting step of correcting deviation of an actual passage route of the strip glass film from an original conveying route of the strip glass film by a correcting mechanism while conveying the strip glass film,
The correcting mechanism is provided with a conveying unit that conveys the strip glass film in a state of being fixed and held on a conveying surface, and the correcting step is performed by changing the conveying route of the strip glass film by the conveying unit,
As the transport unit, using an adsorption conveyor that transports the strip glass film in an adsorbed state,
changing the feed path by swinging the suction conveyor around a rotation axis extending perpendicularly to the conveying surface of the suction conveyor;
The suction conveyor includes a belt in which a plurality of suction holes are formed, and a negative pressure generating mechanism arranged on the inner peripheral side of the belt,
The suction conveyor has a basic posture in which the feeding path is parallel to the original conveying path and an inclined posture in which the feeding path is tilted with respect to the original conveying path. it is possible to take
When the suction conveyor takes either the basic posture or the tilted posture, the plurality of suction holes are all covered with the band-shaped glass film. 1. A method for producing a glass film, characterized in that the positions of forming holes for adsorption are adjusted . A first transport mechanism arranged adjacent to the correction mechanism on the upstream side of the transport path and a second transport mechanism arranged adjacent to the downstream side of the transport path are provided,
The glass according to claim 1, wherein the conveying surface of the conveying unit and the conveying surfaces of both the first conveying mechanism and the second conveying mechanism are positioned on the same surface side of the strip glass film. Film production method. The correcting mechanism, the first transport mechanism and the second transport mechanism are arranged in a section in which the strip glass film is transported in a flat posture on the transport path,
The method for producing a glass film according to claim 2, wherein the transport surface of the transport unit and the transport surfaces of both the first transport mechanism and the second transport mechanism are positioned at the same height. 4. The method for producing a glass film according to claim 1 , wherein the axis of rotation is positioned at an upstream end of the suction conveyor in the feeding direction. The method for producing a glass film according to any one of claims 1 to 4, characterized in that the axis of rotation is positioned at a central portion of the suction conveyor in a direction along the width direction of the band-shaped glass film. A detector is provided on the upstream side of the transport path with respect to the correcting mechanism for detecting a deviation in the width direction of the width direction end of the strip glass film,
The method for producing a glass film according to any one of claims 1 to 5 , wherein the feed path is changed based on the detection result of the detector.

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