TWI558643B - Film take up apparatus and manufacturing method of film using the film take up apparatus - Google Patents

Description

Film winding device and method for manufacturing film using film winding device

The present invention relates to a turret type film winding device and a method of manufacturing a film using the film winding device, and more particularly to an air press method applied to a turret film winding The device is improved when the device is installed.

For example, an optical film such as a protective film, or an optical compensation film, and an antireflection film which requires a film having a manufactured surface of Triacetyl Cellulose (TAC) or the like is used for a high degree of planarity. A polarizing plate for protecting a liquid crystal display device, which is a film produced by a process step of coating, drying, or the like of the manufactured film.

The film is generally produced by a solution film forming method or a melt film forming method, and the produced film is wound around a winding device. Therefore, winding deviation, winding wrinkles, scratches (including minute scratches of about 50 μm to 100 μm) at the time of winding, dent deformation at the center of the film, and deformation of the film end (commonly referred to as an ear) (depression) The winding failure such as collapse or the like becomes a big problem in quality.

The winding failure of the film is associated with subsequent coating failures or drying failures, so the user will perform a more rigorous inspection of the product film. In particular, due to the widening of the film in recent years (for example, 2000 mm or more), it is difficult to discharge the air that is entrained during winding, so that it is difficult to cause a winding failure in the winding process.

In general, when the advancing film is wound around the winding shaft to form a winding roll, the carrier air carried during the advancement of the film is caught between the film layers. Thereby, the roll becomes slack, and a winding failure such as a winding deviation occurs. The depression or collapse is a phenomenon in which the carried air that is wound into the wound roll at the time of winding is discharged from the wound roll over time, and the portion where the carried air has been discharged sinks. Therefore, in order to obtain the winding hardness which does not cause winding deviation, it is necessary to remove the carried air at the time of winding. In particular, in recent years, as the width of the film is increased, it is difficult to discharge the carrier air that is wound into the wound roll at the time of winding from the both end portions of the wound roll, and thus winding failure is likely to occur.

A conventional general winding method in which air is removed is a method of increasing the winding tension. However, the method of increasing the winding tension has the drawback that the removal of air (especially for the central portion in the width direction of the film) is low, and the ear is generated due to stress concentrated in the width direction of the film. Deformation (sinking or stretching of the knurling portion).

Therefore, a winding device has been developed which can exclude carrier air without increasing the winding tension. For example, Patent Documents 1 to 2 exist.

In the winding device of Patent Document 1, the winding air is pressed against the winding surface of the winding start point by air pressing, and the air carried in the winding roll is removed. .

However, in the winding device of Patent Document 1, since the pressing roller comes into contact with the film surface, it is impossible to prevent scratches caused by slip or the like. In particular, if a substance such as dust adheres to the surface of the wound roll, it is easy to cause a large scratch due to foreign matter interposed between the squeeze roll and the wound roll.

Therefore, in particular, for the winding device for an optical film, for example, a winding device of Patent Document 2, which is not in contact with the surface of the wound roll, is used in many cases.

In the winding device of Patent Document 2, air is ejected from an air nozzle to a surface of a winding roll and air is pressed, whereby the air can be carried into the winding roll without coming into contact with the winding roll. Air is excluded.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-220143

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2005-096915

However, when the turret type winding device adopts the air pressing method, as shown in FIG. 9, it is necessary to move the wound winding 1 in the wound state in which the winding has been completed from the winding position, and to proceed next. The wound winding shaft 2 is moved to a winding position, and the turret-type winding device includes a plurality of winding shafts, and the film is continuously wound without stopping the production line. Therefore, it is necessary to rotate the turret 3 by 180 degrees around the rotation axis 3A. In this case, there is a problem that when the turret 3 rotates, the air nozzle 4 becomes an obstacle, and it is necessary to temporarily evacuate the air nozzle 4 to the outside of the rotating trajectory 5 of the turret 3. Here, the rotation trajectory of the turret 3 is a trajectory (dotted line) drawn by the outermost edge of the wound winding 1 as shown in FIG. 9, and the winding reel 1 and the rotating shaft 3A of the turret The center O is separated by the longest distance.

When the air nozzle 4 is retracted, when the winding is performed on the outer peripheral side of the wound winding 1 that has been wound, the surface of the wound winding 1 is not pressed by air, and thus the volume is generated on the outer peripheral side. Winding failure around deviations and the like. As a measure against the winding failure, conventionally, when winding is performed on the outer peripheral side, the winding tension is increased to cope with the winding failure.

However, when winding is performed on the outer peripheral side, even if the winding tension is increased, the winding failure cannot be solved. In particular, in the case of a large-width film having a film width of 2000 mm or more, the carried air cannot be sufficiently removed, and thus a winding failure of depression or collapse is caused. Further, even in the case of a film having a film width of 2000 mm or less, when the winding tension is increased, a winding deviation failure frequently occurs.

The present invention has been made in view of the above circumstances, and an object of the invention is to provide a film winding device and a method for producing a film using the same, which are applied to a film winding device of a turret type even in an air pressing method. In the case of rotating the turret, it is not necessary to evacuate the air nozzle, and the winding of the winding roll can be performed by air pressing until the winding is completed, so that the carried air can be efficiently removed. It is most suitable for winding films that require a high degree of planar properties.

In order to achieve the object, a film winding device according to an aspect of the present invention is a film winding device which winds a traveling strip-shaped film around a winding shaft to form a wound roll, and is provided with a plurality of the windings. The turret of the shaft rotates around the rotation axis, thereby moving the wound winding in the full state from the winding position, and moving the winding shaft to be wound next to the winding position, the turret The film winding device is characterized in that, for each of the winding shafts, the air ejection unit is integrally provided with the turret, and the air ejection unit rotates with the turret Rotating together, the air ejecting unit includes at least: an air nozzle that injects air onto a surface of the winding reel to press air on a surface of the winding reel; and an air introduction conduit that hollowly forms the rotating shaft, And introducing air to the air nozzle via the rotating shaft; and moving the mechanism to follow the winding volume while maintaining a distance between the discharge port of the air nozzle and the surface of the winding roll at a predetermined distance Change the winding diameter of the air moving nozzle.

Here, the introduction of air into the air nozzle via the rotating shaft includes, in addition to the use of the rotating shaft itself as a pipe for air pressing, the arrangement of the air hose in the rotating shaft. meaning.

According to the film winding device of the above aspect, the air ejecting mechanism rotates together with the rotation of the turret, the air ejecting mechanism includes: an air nozzle that ejects air to the surface of the winding reel, and air is applied to the surface of the winding reel Pushing; moving the mechanism to move the air nozzle; and air introducing the pipe to introduce air into the air nozzle. Therefore, it is not necessary to switch the winding of the film as in the prior art, and when the turret is rotated, the air nozzle is temporarily retracted beyond the rotation trajectory of the turret. Therefore, it is of course possible to press the surface of the wound roll from the start of the winding of the film, and it is possible to surely perform the winding process on the outer peripheral side of the wound roll which is used to rotate the turret and switch the film. The ground is pressed against the surface of the wound roll.

Therefore, even when the air pressing method is applied to the tumbling type film winding device, when the turret is rotated, it is not necessary to evacuate the air nozzle as in the related art, and the film can be wound from the beginning. The winding coil is air-pressed from the winding shaft to the end of winding. Thereby, it is possible to effectively prevent the winding failure caused by the carried air.

According to the invention, the air ejection unit is preferably arranged in a rotating orbit of the turret. Thereby, when the turret rotates, the air ejection unit does not come into contact with various types of equipment disposed around the turret, and the apparatus can be made compact.

According to the invention, it is preferable that a rotary joint is provided to the rotary shaft, and the rotary joint is rotatably coupled to an air pipe up to an air source provided outside the turret. Thereby, the air introduction line is not twisted by the rotation of the turret.

The present invention is preferably configured such that a guide roller is provided which rotates together with the turret when the turret rotates, and is wrapped by a film wound around the wound roll ( Wrap), and in the advancement path of the film wrapped around the guide roller, the air ejection unit is disposed.

Thereby, the guiding roller can restrict the advancement path of the film, so that when the turret rotates, the film in the winding process does not come into contact with the air ejecting unit, and therefore, the film does not come into contact with the air ejecting unit, thereby causing the film to be caused to come into contact with the air ejecting unit. The film is damaged.

In the present invention, the moving mechanism preferably moves the air nozzle while maintaining a distance between the discharge port of the air nozzle and the surface of the winding roll of 2 mm to 15 mm. If the distance is less than 2 mm, the discharge port of the air nozzle may come into contact with the surface of the wound roll, and if the distance exceeds 15 mm, the pressure when the air is pressed against the surface of the wound roll is not sufficient. The ground will carry air to be excluded. Further, even if the winding diameter of the wound winding is changed, the moving mechanism can maintain the air pressing pressure for the surface of the wound winding with a proper pressure.

In the present invention, the air introduction line preferably branches from the rotating shaft to a header pipe provided for each of the air nozzles, and from the manifold through a plurality of flexible hoses (flexible hoses) The air is introduced uniformly along the width direction of the air nozzle. Thereby, even if the air nozzle width becomes larger in accordance with the width of the wound film, the surface of the wound roll can be uniformly pressed against the air in the width direction.

In the present invention, it is preferable that the switching mechanism is provided in each of the manifolds, and the switching mechanism can switch the air flowing from the rotating shaft to the air nozzles for the respective winding shafts within 3 seconds. Thereby, the film winding switching between the plurality of winding shafts is completed, and the air pressing of the surface of the winding roll can be quickly switched. Therefore, winding failure caused by carrying air does not occur at the time of winding switching.

In the present invention, it is preferable that the pair of the moving mechanisms are provided at both end portions in the width direction of the air nozzle so that the dust of the driving portion is not dropped onto the film. Thereby, the dust generated by the driving portion of the moving mechanism is less likely to adhere to the film. In particular, when the film is an optical film, foreign matter such as dust adhering to the film affects quality. Therefore, when the air ejecting unit is integrally provided with the turret, it is important to prevent dust generated by the driving portion of the moving mechanism. Attached to the wound roll. The drive unit is, for example, a ball screw or a linear guide.

In the invention, it is preferable that a cover is provided in a driving portion of the moving mechanism. Thereby, it is possible to reliably prevent the dust generated by the driving portion of the moving mechanism from scattering to the outside.

In the present invention, the width of the film is preferably 2000 mm or more.

If the film width is a large width of 2000 mm or more, when the carrier air at the time of winding is wound into the winding roll, the carrier air is not easily discharged from both ends of the winding roll. Therefore, it is particularly effective for the present invention that the film has a width of 2000 mm or more. Furthermore, even when the width of the film is 2000 mm or less, the winding deviation is effectively prevented.

In order to achieve the object, a method for producing a film of one embodiment of the present invention is characterized by comprising: a film forming step of manufacturing a film; and a film winding step of using the film winding device of the above method to manufacture the film The film is wound.

The film forming step may be, for example, a solution film forming method in which a dope is cast on a support into a film form, or a melt film forming method in which a raw material resin is dissolved or dispersed. The molten film forming method is a method in which a molten resin is extruded from a die in a film form onto a cooling drum, which is made by using an extruder The raw material resin is melted.

According to the method for producing a film according to the above aspect, the winding step of the produced film is performed by the film winding device, so that winding deviation, winding wrinkles, and scratches at the time of winding do not occur (including 50 Winding defects such as minute scratches of about μm to 100 μm, deformation of the center of the film, and deformation of the film end (generally referred to as ear) (rolling portion depression or stretching). Thereby, a planar high-quality film can be produced.

In order to achieve the object, a method of manufacturing an optical film according to another aspect of the present invention is characterized by comprising at least a film winding step of winding a film for manufacturing an optical film by the film winding device of the above-described manner; The wound film is subjected to reverse winding to apply an optical coating liquid, and a drying step of drying the applied coating layer.

According to the method for producing a film of the above aspect, the film winding step is performed by the film winding device, so that winding deviation, winding wrinkles, and scratches (including 50 μm to 100) do not occur during winding. A small scratch of about μm), a deformation of the depression at the center of the film, and a winding failure of the end of the film (generally referred to as an ear) (depression or extension of the knurled portion). Thereby, in the coating step or the drying step, coating failure or drying failure caused by the winding failure does not occur, and therefore, a high-quality optical film can be manufactured.

In the above mode, it is preferable to include a product film winding step of winding the manufactured optical film by the film winding device of the above-described method.

Even when the optical film as a product is wound, a higher quality optical film can be produced by using the film winding device of the present invention.

In the above aspect, the optical film is preferably any one of a polarizing plate protective film, an optical compensation film, and an antireflection film of a liquid crystal display device. The reason is that such an optical film requires extremely high planarity.

[Effects of the Invention]

According to the film winding device of the present invention, even when the air pressing method is applied to the turret-type winding device, when the turret is rotated, it is not necessary to retract the air nozzle, and it is possible to start from winding. The wound roll is air-pressed until the winding is completed, so that the entire winding length can be ensured with high quality.

Therefore, according to the method of producing an optical film using the winding device, an optical film requiring a high degree of planar properties can be manufactured.

Hereinafter, preferred embodiments of the film winding device of the present invention and a method for producing an optical film using the same will be described in detail.

1 is a conceptual view of a film forming line 14 in which a turret-type film winding device 10 of the present invention is assembled to a film 12.

As shown in FIG. 1, the film 12 manufactured by the film forming line 14 is wound around the turret-type film winding device 10 via the film winding switching device 16. In the present embodiment, an example of a two-axis turret type film winding device having two winding shafts will be described. However, the winding shaft may be two or more. The film forming line 14 may be, for example, a solution film forming method in which a coating material is cast on a support into a film form, or a melt film forming method in which a raw material resin is dissolved or dispersed in a solvent. The melt film forming method is a method in which a molten resin is extruded from a mold into a film in a film form, and the molten resin is obtained by melting a raw material resin by an extruder.

Further, the film winding switching device 16 is a device in which the turret rotates after one of the two shafts is wound, and the film 12 is wound when the empty winding shaft is at the winding position. Switch from the full winding axis to the empty winding axis. The detailed description of the film winding switching device 16 is not intended to be the object of the present invention. Therefore, for example, a film winding switching device disclosed in Japanese Laid-Open Patent Publication No. 2008-230723 can be preferably used.

The winding drive control unit 10A that drives and controls the winding of the film winding device 10 and the winding switching drive control unit 16A that drives and controls the winding switching of the film winding switching device 16 are based on the controller (controller) ) 18 instructions to control.

As shown in FIGS. 2 and 3, the two-axis turret type film winding device 10 includes a turret 22 rotatably provided to the gantry 20, and an air ejecting unit 24 that rotates together with the turret 22. Further, in FIGS. 2 and 3, the posture of the turret 22 during the film winding process is inclined as compared with the horizontal state of FIG. 1, but the posture of the turret 22 is not particularly limited.

The gantry 20 is formed by a bottom plate 20A and a pair of side plates 20B and 20B having a concave cross section, and the pair of side plates 20B and 20B are disposed to face each other with a width larger than the width of the film 12. Further, the rotating shaft (rotating shaft) 26 is rotatably supported by a pair of bearings (not shown) provided at the upper end portions of the pair of side plates 20B and 20B. The turret 22 includes a pair of arm-shaped plates 28, 28 that face in parallel, and a central portion of the pair of arm-shaped plates 28, 28 is supported by the rotating shaft 26. The rotating shaft 26 is coupled to a rotational driving source (not shown). Thereby, the turret 22 rotates due to the rotation of the rotating shaft 26. In the present embodiment, the turret 22 is described as an example of an arm-shaped turret, but a disk-shaped turret including a pair of parallel circular plates may be used.

Bosses 30 and 30 are protruded inside the both end portions of the pair of arm-shaped plates 28 and 28 which face each other in parallel, and the hollow core 31 is fitted and supported by the pair of bosses 30 and 30. Thereby, a winding shaft 32 is formed which is wound around the film 12. Further, the winding shaft 32 as follows is referred to as a first winding shaft 32A, and the winding shaft 32 is wound at a winding position close to the film winding switching device 16. Further, the empty winding shaft 32 is referred to as a second winding shaft 32B, and the empty winding shaft 32 stands by at a standby position away from the film winding switching device 16 for the next winding.

Further, the winding drive control unit 10A drives and controls the intermittent rotation of the turret 22 (180 degrees per rotation) and the rotation of the winding shafts 32A and 32B, respectively, based on an instruction from the controller 18.

Further, a winding diameter sensor (not shown) is provided in the vicinity of the winding position, and the winding diameter sensor (not shown) has a winding diameter of the wound winding 34 wound around the first winding shaft 32A. The measurement is performed and the detection signal is sent to the controller 18. The controller 18 calculates the winding diameter of the wound winding 34 at any time based on the detection signal of the winding diameter sensor, and outputs the winding switching command to the film winding device 10 and the film roll if the winding diameter is full. The switching device 16 is wound.

The air ejection unit 24 integrally provided with the turret 22 presses the surface of the wound roll 34 with air, thereby preventing the carried air carried by the wound film 12 from being caught in the winding roll 34 for each of the first rolls. The air ejection unit 24 is provided around the shaft 32A and the second winding shaft 32B. That is, the air ejection unit 24 includes an air nozzle 36 that ejects air to the surface of the winding reel 34, presses the surface of the winding reel 34 with air, and an air introduction line 38 that hollowly forms the rotating shaft 26 and The shaft 26 is rotated to introduce air into the air nozzle 36; and the moving mechanism 40 moves the air nozzle 36 following the change in the winding diameter of the winding coil 34. The air ejection unit 24 is integrally provided with the turret 22 in such a manner as to rotate together with the rotation of the turret 22. The air ejection unit 24 constructed in the above manner is preferably disposed in the rotation track S of the turret 22. The rotation track S of the turret 22, as shown in FIG. 3, refers to a trajectory (two-dot chain line) drawn by the outermost edge of the winding roll 34, and the winding roll 34 and the rotating shaft 26 of the turret 22 are shown. The center 0 is separated by the longest distance.

The air nozzle 36 includes a slit-shaped discharge port 36A formed to have the same width as the width of the film 12. The air supplied from the air introduction line 38 is ejected from the discharge port 36A toward the surface of the wound roll 34.

The air introduction line 38 includes a plurality of flexible hoses 38B connected at one end to a plurality of air intake ports 38A formed along the width direction of the air nozzles 36, and a manifold 38C connected to the other end of the plurality of flexible hoses 38B. And a hollow rotating shaft 26 that communicates with the manifold 38C. Further, the air pipe 42 up to the air generating device (not shown) of the air is connected to the rotary joint 38D, and the rotary joint 38D is provided on the rotating shaft 26. Thereby, even if the air ejection unit 24 rotates together with the rotation of the turret 22, the air introduction line 38 is not twisted.

A plurality of flexible hoses 38B and a main pipe 38C are provided for each of the air nozzles 36, and an opening and closing valve (not shown) is provided in each of the manifolds 38C. Each of the on-off valves is opened and closed in accordance with an instruction from the controller 18. That is, the opening and closing valve of the header 38C of the air nozzle 36 that conveys air to the film winding process is opened, and the opening and closing valve of the other manifold 38C is closed.

Thereby, the air from the air generating device is supplied to the air nozzle 36 through the air pipe 42, the rotary joint 38D, the hollow rotating shaft 26, the main pipe 38C in which the opening and closing valve is opened, and the plurality of flexible hoses 38B. The pressure at which the air is pressed against the surface of the wound roll 34 by the air from the air nozzle 36 is preferably in the range of 5 kPa to 30 kPa. If the pressure at the time of air pressing is less than 5 kPa, the effect of removing the carried air is small, and it may cause a winding failure. On the other hand, when the pressure at the time of air pressing exceeds 30 kPa, the pressure of the air pressing is too strong, and the winding is excessively hard, which may cause a winding failure of the black belt or the like.

The moving mechanism 40 moves the air nozzle 36 forward and backward with respect to the surface of the wound roll 34 while maintaining the distance between the air nozzle 36 and the surface of the winding roll 34 at a predetermined distance. The moving mechanism 40 is in the following manner Composition. That is, in the pair of arm-shaped plates 28 and 28 facing each other, the extending plates 28A and 28A are extended from opposite ends of the pair of arm-shaped plates 28 and 28, and the arm-shaped plate 28 is formed as N shape. Further, on the inner side of the opposite extending plates 28A, 28A, two linear guides are respectively laid in parallel in a direction orthogonal to the axis of the first winding shaft 32A or the second winding shaft 32B. Rail 44. Further, both end portions of the air nozzle 36 are supported by the opposing rails 44 via a block 46 and a slide block (nut member) 48. Further, the ball screw 50 is screwed to the slider 48, and one end of the ball screw 50 is coupled to a rotating shaft of a motor 52, and the motor 52 is supported by the extending plate 28A.

Further, the controller 18 controls the rotational speed of the motor 52 based on the winding diameter of the wound winding 34, which is a winding diameter calculated based on a detection signal from the winding diameter sensor. As a result, as shown in FIG. 4A and FIG. 4B, the distance L between the discharge port 36A of the air nozzle 36 and the surface of the winding roll 34 can be maintained at a predetermined distance, and the winding diameter of the winding roll 34 can be changed. The air nozzle 36 moves. 4A shows a state in which the winding diameter is small, and FIG. 4B shows a state in which the winding diameter is thick.

The distance L between the discharge port 36A of the air nozzle 36 and the surface of the wound roll 34 is preferably in the range of 2 mm to 15 mm. When the distance L is less than 2 mm, the discharge port 36A may come into contact with the surface of the wound roll 34. On the other hand, when the distance L exceeds 15 mm, the pressure at the time of air pressing of the surface of the wound winding 34 does not sufficiently remove the carried air. Further, it is preferable to provide a dustproof cover (not shown) to the linear guides (the rails 44 and the blocks 46) and the ball screw 50 so that the generated dust does not scatter.

Further, as shown in FIG. 3, it is preferable to include a guide roller 54 in the turret 22, which guide roller 54 restricts the advancement path of the film 12 so that when the turret 22 rotates, it is wound around the winding roll 34. The film 12 does not come into contact with the air ejection unit 24, and in particular does not come into contact with the flexible hose 38B or the moving mechanism 40 of the air introduction line 38. That is, as shown in FIG. 3, the support arm 56 is extended in the curved shape from the extension board 28A to the outer side of the flexible hose 38B. The guide rollers 54 are rotatably supported by the front end portion and the center portion of the support arm 56, respectively. Thereby, a configuration is adopted in which the guide roller 54 is provided, and the air ejection unit 24 is disposed in the advance path of the film 12 wrapped around the guide roller 54, which is rotated when the turret 22 is rotated Rotating with the turret 22 and wrapped by the film 12 wound around the winding roll 34.

Further, the number of the guide rollers 54 is not limited to two. Further, in Fig. 3, the guide roller 54 is supported by the support arm 56 extending from the extension plate 28A, but the disk-shaped turret may be employed to form the support portion of the guide roller 54. In short, the guide roller 54 may be rotated together with the rotation of the turret 22. Thereby, when the turret 22 is rotated, the film 12 to be wound around the winding roll 34 can be prevented from coming into contact with the air ejection unit 24, so that the surface of the film 12 is not damaged by contact.

Next, the action of the film winding device 10 configured as described above will be described.

As shown in FIG. 5A, in the winding position, the film 12 is wound around the first winding shaft 32A, and the surface of the wound roll 34 is pressed by the air by the air ejected from the air nozzle 36. Thereby, the carrying air carried during the advancement of the film 12 is prevented from being caught in the winding roll 34 to cause the winding failure.

Next, based on the detection signal from the winding diameter sensor (not shown), after the controller 18 detects that the winding diameter of the wound film 12 has been filled, the controller 18 sends a winding switching command to the film winding. The winding drive control unit 10A of the apparatus 10 and the winding switching drive control unit 16A of the film winding switching device 16 are provided. For example, when the film 12 of 4000 m is wound around the first winding shaft 32A, the controller 18 judges that the film has been wound up by winding the diameter of 3800 m, and issues a winding switching command.

As shown in FIG. 5C, the winding drive control unit 10A rotates the turret 22 by 180 degrees based on the winding switching command, and moves the second winding shaft 32B at the standby position to the winding position. On the other hand, the wound winding 34 that has been wound up is moved to the standby position until the winding switching of the film 12 by the film winding switching device 16 is completed (until winding 4000 m), and the film 12 is continuously wound. Wrap around.

In the rotation of the turret 22 for effecting film winding switching, since the air ejection unit 24 including the air nozzle 36 is integrally provided with the turret 22, the air ejection unit 24 is rotated. The tower 22 rotates together to rotate. Thereby, even when the air pressing method is applied to the turret-type film winding device 10, it is not necessary to retract the air nozzle 36 to the outside of the rotating track S when the turret rotates. Therefore, the surface of the wound roll 34 can be continuously pressed by air from the start of winding the film around the first winding shaft 32A until the end of winding. In particular, the air from the air nozzle 36 is used to press the surface of the wound coil 34 even during the period from the start of the winding switching by the rotation of the turret (the period from 3800 m to 4000 m). Therefore, the winding failure does not occur after the start of the winding switching (that is, at the outer peripheral portion of the winding roller) as in the conventional turret type winding device.

Further, in the embodiment of the present invention, since the guide roller 54 that rotates together with the turret 22 is provided, the film 12 wound around the winding roll 34 does not come into contact with the air ejection unit 24 to cause scratches or the like. failure.

The case will be described using FIGS. 5A to 5C. When the turret 22 is rotated by 90 degrees from the state of Fig. 5A, the state of Fig. 5B is obtained. As can be seen from Fig. 5B, before the flexible hose 38B or the moving mechanism 40 comes into contact with the film 12 to be wound, the guide roller 54 is wrapped by the film 12 to perform the driven rotation. Further, as shown in FIG. 5C, when the turret 22 is rotated by 180 degrees, the advancing path is formed such that the film 12 advances outside the flexible hose 38B or the moving mechanism 40. Thereby, when the turret 22 is rotated, the film 12 to be wound around the winding roll 34 can be prevented from coming into contact with the air ejection unit 24.

On the other hand, after the turret 22 rotates to move the second winding shaft 32B to the winding position, the winding switching drive control portion 16A cuts the film 12 wound around the first winding shaft 32A, and The front end portion of the cut film 12 is adhered to the second winding shaft 32B. At the same time as the adhesion, the second winding shaft 32B is rotated by the winding drive control portion 10A, and the film 12 is wound around the second winding shaft 32B. Thereby, the advancing film 12 is wound from the first winding shaft 32A to the second winding shaft 32B, thereby continuously winding the film 12.

At the same time as the winding switching is completed, the controller 18 closes the opening and closing valve of the header 38C on the first winding shaft 32A side, and opens the header 38C on the second winding shaft 32B side. Thereby, air is ejected from the air nozzle 36 to the surface of the wound winding 34 wound around the second winding shaft 32B, thereby discharging the carried air carried by the film 12.

The switching timing of the on-off valve is preferably as early as possible. Preferably, if the switching timing is within 3 seconds from the end of the winding switching, it is possible to prevent the winding failure from occurring and there is no problem.

As described above, according to the film winding device 10 of the present embodiment, even when the air pressing method is applied to the turret-type winding device, when the turret is rotated, it is not necessary to evacuate the air nozzle 36, and it is possible to At the start of winding, air is pressed against the wound winding 34 until the winding is completed, so that the carried air can be efficiently removed. Thereby, the winding failure can be surely prevented.

In the above-described film winding device 10, an air ejecting unit 24 is disposed in such a manner that air is ejected upward to the winding reel 34 in the winding process, thereby winding the winding 34. Push the air. However, as shown in FIG. 6, the air ejection unit 24 may be disposed such that the air is sprayed laterally to the winding roll 34. Although not shown, the air may be ejected downward. In this manner, the air is ejected to the winding roll laterally or downwardly, whereby the dust generated during winding is less likely to fly, and therefore, the dust can be prevented from adhering again to the surface of the winding roll.

An example in which the film to be produced is directly wound by the film winding device 10 has been described. For example, a winding example of a protective film of a polarizing plate or the like is described. Next, an example of a manufacturing method in which the film 12 wound around the film winding device 10 as described above is subjected to coating, drying, or the like to produce an optical film will be described with reference to FIG. Methods. An example of an optical film will be described as an example of an optical compensation film.

Further, of course, the film winding device of the present invention is effective for winding the above-described film itself as a protective film for a polarizing plate, and further applies a functional coating liquid to the film. The winding of the optical film is also effective.

Here, as an example of the optical film to which the functional coating liquid is applied, the case of the optical compensation film will be described. However, the optical film is not limited to the optical compensation film, and can be applied to various optical films such as an anti-glare film and an anti-reflection film. In the production method, the various optical films are obtained by applying a curable coating liquid onto a belt-shaped film, and drying the coating layer by heating the air in a drying zone, followed by drying the coating layer in the hardened region. The dried coating layer is hardened.

FIG. 7 is a schematic view showing an overall configuration of an apparatus 100 for manufacturing an optical compensation film.

As shown in Fig. 7, the strip-shaped film 12 is sent out from a turret type feeder 112 in which a transparent resin layer for forming an alignment film is formed in advance. Further, reference numeral 114 denotes a film joining apparatus which automatically joins the rear end portion of the film 12 of the old roll to the front end portion of the film 12 of the new roll.

The film 12 fed from the feeder 112 via the film joining device 114 is guided by the guide roller 116, and is fed to a friction processing device 118 disposed on the downstream side, and is rubbed by a rubbing roller 120. The transparent resin layer is subjected to a rubbing treatment. Thereby, an alignment film is formed.

In the rubbing treatment device 118, the rubbing roller 120 is disposed between the two transporting rolls in the continuous conveying step of the film 12. Further, the film 12 is wrapped around the rotating rubbing roller 120 and conveyed, whereby the rubbing treatment is continuously performed. In this case, the rubbing roller 120 may be disposed such that the rotational axis of the rubbing roller 120 is inclined with respect to the conveying direction of the film 12.

A dust remover 122 is disposed on the downstream side of the friction processing device 118, and dust adhering to the surface of the film 12 is removed. Further, a gravure coating device 124 is disposed on the downstream side of the dust remover 122, and a coating liquid containing a liquid crystal compound is applied onto the alignment film of the film 12. A liquid crystalline discotic compound having a crosslinkable functional group is preferably used as the liquid crystalline compound.

The gravure coating device 124 includes a gravure roller 126 and a liquid pan 128 disposed under the gravure roll 126 and filled with a coating liquid containing a liquid crystalline compound. The lower half of the gravure roll 126 is immersed in the coating liquid. Further, a blade 129 is disposed at a position of about 10 o'clock of the gravure roll 126. Thereby, the coating liquid is supplied to the cell of the surface of the gravure roll 126, and after the excess coating liquid is scraped off by the blade 129, the coating liquid is applied to the alignment film surface of the film 12. The coating amount of the coating liquid is preferably 10 mL/m ² or less.

The upstream guide roller 117 and the downstream guide roller 119 are disposed in a state substantially parallel to the gravure roll 126. In addition, it is preferable that both the upstream guide roller 117 and the downstream guide roller 119 are rotatably supported by a bearing member (such as a ball bearing) (not shown), and does not include a drive mechanism. The gravure coating device 124 is preferably disposed in a clean environment such as a clean room. The degree of cleanliness is preferably 1000 or less, more preferably 100 or less, and still more preferably 10 or less.

As an example of the coating apparatus, the gravure coating apparatus 124 is shown in FIG. 7, but it is not limited to this. For example, a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, and a wire drawing method can be suitably used. A method such as a wire bar coating method, a microgravure method, or an extrusion coating method. The conveying speed of the film 12 is preferably 5 m/min to 200 m/min. Further, the width of the coating layer formed on the film 12 is preferably 0.5 m to 3 m.

The film 12 is dried by an initial drying zone 130 provided on the nearest downstream side, and the film 12 is formed with a coating layer containing a liquid crystalline compound. Further, a drying zone 132 is provided on the downstream side of the initial drying zone 130, and the coated layer of the dried film 12 is further dried. Further, a hardened region 136 is provided on the downstream side of the drying region 132 to harden the coating layer of the dried film 12.

In this case, it is preferable to arrange the intermediate portion 134 between the dry region 132 and the hardened region 136 which is controlled in such a manner that the temperature is lower than the temperature of the dry region 132 and the temperature of the hardened region 136. If the intermediate portion 134 is not provided and the coating layer is directly transferred from the drying region 132 to the hardened region 136, the low molecular weight compound may sometimes condense in the hardened region 136 having a temperature lower than the temperature of the dry region 132, the low molecular weight compound It is a compound which evaporates from the film 12 and the coating layer which are heated in the drying area 132. The precipitate (condensate) precipitated by condensation adheres to the back surface of the film 12 and the coating layer, thereby causing contamination. Further, the condensate which is condensed by the wall surface of the hardened region 136 or the like falls and adheres to the back surface of the strip-shaped film 12 and the coated film surface, thereby causing contamination. Here, the term "low molecular weight compound" means a compound having a molecular weight of 1,000 or less.

In the production process of the optical compensation film, as the low molecular weight compound, for example, Triphenyl Phosphate (TPP) or Biphenyl Diphenyl Phosphate (BDP) as a plasticizer is present; IRGACURE (Japanese registered trademark of NAGASE & Co., Ltd.) of the hardener; 184; and propylene methoxypropyltrimethoxydecane as a silane coupling agent Wait.

Further, the optical compensation film 13 manufactured through the hardened region 136 is passed through the winding tension control device 138, and then wound around the turret-type film winding device 10 via the film winding switching device 16 described above. Further, the symbol 138A is a dancer roller.

As described above, the film 12 is wound by the turret-type film winding device 10 of the present invention, and the optical compensation film 13 is wound, and the optical compensation film 13 is subjected to coating, drying, or the like of the film 12. By manufacturing the film, it is possible to produce an optical film which has no winding deviation, winding wrinkles, scratches (including minute scratches of about 50 μm to 100 μm), and a central portion of the film. The deformation of the depression, the deformation of the film end (generally referred to as the ear) (the embossing of the embossed portion or the stretch), and the like have a winding failure and a high degree of planarity.

Next, various materials used in the production process of the optical film of the present embodiment will be described.

As the discotic compound (liquid crystal compound) used in the present embodiment, each of the publications of Japanese Patent Laid-Open No. Hei 7-267902, Japanese Patent Laid-Open No. Hei 7-281028, and Japanese Patent Laid-Open No. Hei 7-306317 Revealed compounds. According to the above publication, the optically anisotropic layer (coating layer containing a liquid crystalline compound) is a layer formed of a compound having a disk-like structural unit. In other words, the optically anisotropic layer is a low molecular weight liquid crystalline disk-like compound layer such as a monomer or a polymer layer obtained by polymerization (hardening) of a polymerizable liquid crystalline disk-shaped compound. .

As the disc-shaped (disc-shaped) compound, for example, a benzene derivative disclosed in a report by C. Destrade et al., Mol. Cryst., Vol. 71, p. 111 (1981); Mol. Cryst., Vol. 122, p. 141 (1985), Physics Letter A, (Physicslett, A), vol. 78, p. 82 (1990), C. Destrade et al. Revealed trimexene derivatives; cyclohexane derivatives disclosed in the study by B. Kohn et al., Amegew. Chem., Vol. 96, p. 70 (1984); J. Chem. Commun., 1970 (1985), JMLehn et al., J. Am. Chem. Soc., Vol. 116 The aza crown system or the phenylacetylene macrocycle compound disclosed in the research report of J. Zhang et al., 2655 (1994).

The disc-shaped (disc-shaped) compound has a configuration in which the compound is generally used as a core of a molecular center, and is linearly oriented to a linear alkyl group or an alkoxy group, a substituted benzoic acid group. The disk-like (disc-shaped) compound exhibits liquid crystallinity as a linear change thereof. Among the disc-shaped (disc-shaped) compounds, a compound called a discotic liquid crystal is generally contained. However, as long as the molecule itself has a negative uniaxiality and can form a fixed alignment, it is not limited to the disclosed disc-shaped (disc-shaped) compound. Further, in the above publication, the material is formed of a disk-shaped compound, and the material to be finally formed need not be the compound, and for example, the low molecular weight liquid crystal may be formed by heat, light, or the like. As a result, the base of the reaction is polymerized or crosslinked by heat, light, or the like, and the molecular weight is increased, and the liquid crystallinity is lost. Further, it is preferred to use a compound containing at least one discotic compound capable of forming a discotic phase or a uniaxial columnar phase and having optical anisotropy. Further, the discotic compound is preferably a triphenylene derivative. Here, the triphenylene derivative is preferably a compound represented by (Chem. 2) disclosed in Japanese Laid-Open Patent Publication No. Hei 7-306317.

As the film 12 to be a support of the alignment film layer, a cellulose acylate film such as TAC is preferably used. Specifically, a film disclosed in detail in Japanese Laid-Open Patent Publication No. Hei 9-152509 can be used. That is, the alignment film is provided on the deuterated cellulose film or on the undercoat layer coated on the deuterated cellulose film. The alignment film functions to define an alignment direction of the liquid crystalline disk-like compound, and the liquid crystalline disk compound is provided on the alignment film. Here, the alignment film may be any layer as long as the alignment property can be imparted to the optically anisotropic layer.

Preferable examples of the alignment film include a rubbed layer of an organic compound (preferably a polymer), an oblique vapor-deposited layer of an inorganic compound, and a layer having microgrooves, and ω- a laminated film formed by a Langmuir Blodgett method (LB film) such as ditridecanoic acid, dioctadecylmethylammonium chloride, or methyl stearate, or by A layer that applies an electric or magnetic field to align the dielectric.

Examples of the organic compound for the alignment film include polymethyl methacrylate, acrylic acid/methacrylic acid copolymer, styrene/maleimide copolymer, polyvinyl alcohol, and poly(N-methylol propylene). Indoleamine, styrene/methylstyrene copolymer, chlorosulfonated polyethylene, nitrocellulose, polyvinyl chloride, chlorinated polyolefin, polyester, polyimine, vinyl acetate/vinyl chloride copolymer, A polymer such as an ethylene/vinyl acetate copolymer, carboxymethyl cellulose, polyethylene, polypropylene, or polycarbonate, or a compound such as a decane coupling agent. Examples of preferred polymers include polyienimine, polystyrene, a polymer of a styrene derivative, gelatin, polyvinyl alcohol, and an alkane having an alkyl group (preferably having 6 or more carbon atoms). Polyvinyl alcohol.

Among the polymers, an alkoxy-modified polyvinyl alcohol which is excellent in the ability to uniformly align a liquid crystalline disc-shaped compound is particularly preferable. The reason is presumed to be a strong interaction between the alkyl chain of the alignment film surface and the alkyl side chain of the discotic liquid crystal. Further, for the alkyl group, the number of carbon atoms is preferably from 6 to 14, and the alkyl group is preferably via -S-, -(CH ₃ )C(CN)- or -(C ₂ H ₅ )N-CS-S- It is bonded to polyvinyl alcohol. The alkoxy-modified polyvinyl alcohol preferably has an alkyl group at the terminal, a degree of saponification of 80% or more, and a degree of polymerization of 200 or more. In addition, as the polyvinyl alcohol having an alkyl group in the side chain, a product such as MP103, MP203, and R1130 (trade name) manufactured by Kuraray Co., Ltd. can be used.

Moreover, a polyimine film (preferably a fluorine atom-containing polyimine) which is widely used as an alignment film of a liquid crystal display (LCD) is also preferable as an organic alignment film. A SE series manufactured by a poly-proline (for example, LQ/LX series (trade name) manufactured by Hitachi Chemical Co., Ltd., Nissan Chemical Industries, Ltd.) The product name) or the like is applied to the mesh surface, and is calcined at 100 to 300 ° C for 0.5 hour to 1 hour, and then rubbed to obtain the polyimide film.

Further, the alignment film to be applied to the deuterated cellulose film is preferably a cured film obtained by introducing a reactive group into the polymer or using the polymer together with a crosslinking agent such as an isocyanate compound or an epoxy compound. These cured polymers are obtained by hardening these polymers.

The polymer used in the alignment film and the liquid crystal compound of the optically anisotropic layer are preferably chemically bonded via the interface of the respective layers. The polymer of the alignment film is preferably formed of a polyvinyl alcohol obtained by replacing at least one hydroxyl group with a group including a vinyl moiety, an oxiranyl moiety or an aziridine moiety. a group comprising a vinyl moiety, an oxiranyl moiety or an aziridine moiety, preferably a polymer bonded to a polyvinyl alcohol derivative via an aryl ether bond, a urethane bond, an acetal bond or an ester bond chain. The group including the vinyl moiety, the oxiranyl moiety or the aziridine moiety preferably does not have an aromatic ring. The polyvinyl alcohol is preferably disclosed in Japanese Laid-Open Patent Publication No. Hei 9-152509 (Chem. 22).

The rubbing treatment can utilize a processing method widely employed as a liquid crystal alignment processing step of an LCD. That is, a method of obtaining the alignment by wiping the surface of the alignment film in a fixing direction using paper, gauze, felt, rubber or nylon, polyester fiber or the like can be used. . In general, the rubbing treatment is performed by rubbing a cloth or the like which is uniformly planted with fibers having a uniform length and a small thickness to perform rubbing for several times.

In addition, the vapor deposition material of the inorganic oblique vapor deposition film is exemplified by cerium oxide (SiO), and examples thereof include metal oxides such as titanium oxide (TiO ₂ ) and zinc dioxide (ZnO ₂ ), or magnesium fluoride (MgF _{2 ).} a metal such as fluoride, gold (Au) or aluminum (Al). Further, the metal oxide can be used as an oblique vapor deposition material as long as it is a metal oxide having a high dielectric constant. Further, the type of the vapor deposition material is not limited to the above type. An inorganic rhodium deposition film can be formed using a vapor deposition device. The mesh-shaped surface is fixed and vapor-deposited, or the long mesh surface is moved to continuously perform vapor deposition, whereby an inorganic oblique vapor-deposited film can be formed. As a method of aligning the optically anisotropic layer without using an alignment film, a method of applying an electric field while heating the optically anisotropic layer on the mesh surface to a temperature at which the disk-shaped liquid crystal layer can be formed is exemplified. Or magnetic field.

As an application method of applying an optical compensation film to a liquid crystal display device, it is preferable to bond the optical compensation film to one side of a polarizing plate via an adhesive, or to use the optical compensation film as a protective film via an adhesive. While attached to one side of the polarizing element, the optical compensation film is formed with an optically anisotropic layer on the deuterated cellulose film. The optically anisotropic element preferably has at least a disc-like structural unit (preferably a discotic liquid crystal).

Further, it is preferable that the disc surface of the disc-shaped structural unit is inclined with respect to the surface of the deuterated cellulose film, and the angle between the disc surface of the disc-shaped structural unit and the deuterated cellulose film is in the optically anisotropic layer. Changes in the depth direction.

Further, the optical compensation film is particularly preferably used in a transmissive liquid crystal display device. The transmissive liquid crystal display device includes a liquid crystal cell and two polarizing plates disposed on both sides of the liquid crystal cell. The liquid crystal cell carries liquid crystal between the two electrode substrates. An optical compensation film is disposed between the liquid crystal cell and a polarizing plate, or two optical compensation films are disposed between the liquid crystal cell and the two polarizing plates. The mode of the liquid crystal cell is preferably a Vertical Alignment (VA) mode, a Twisted Nematic (TN) mode, or an Optically Compensated Bend (OCB) mode.

[Example 1]

A 4000 m film of a triacetyl cellulose film having a width of 2000 mm and a thickness of 80 μm manufactured in the film forming line of Fig. 1 was wound on a winding shaft by a turret-type film winding device, and When 3800 m has been wound, the turret is rotated to switch the winding of the film.

Next, when the film was wound under the winding conditions of the following Experiments 1 to 3, the quality of the wound film was examined.

(winding condition)

Experiment 1: A conventional film winding device was used, and before and after the turret was rotated, the winding was performed at a winding tension of 550 (N), and the conventional film winding device was not subjected to air pushing. The pressure is increased, and the winding tension of the film is increased, whereby the carried air caught in the wound winding is removed.

Experiment 2: A conventional film winding device is used, which is a film winding device that removes air by air pressing, but since the air nozzle is not connected to the turret It is integrated, so when the turret rotates, the air nozzle must be retracted out of the rotating orbit. Therefore, after the turret is rotated, the winding tension is increased to exclude the carried air. That is, the winding tension before the rotation of the turret is set to 400 (N), and the winding tension after the rotation is increased to 550 (N). Further, the air pressing pressure before the turret rotation was 8.0 (kPa), but after the rotation, the air pressing pressure was 0.0 (kPa) in order to retract the air nozzle.

Experiment 3: Using the film winding device of the present invention, the film winding device of the present invention is a film winding device in which air is pushed by air to remove air, and the air ejection unit and the turret It is integrally provided, whereby air pushing can be performed before and after the rotation of the turret. That is, the winding tension was set to 400 (N) before and after the turret rotation, and the air pressing pressure was set to 8.0 (kPa).

(Method for evaluating the quality of wound film)

The winding quality was evaluated for each of the films wound under the winding conditions of Experiment 1, Experiment 2, and Experiment 3. As a method of winding evaluation, two items of "winding deviation" and "black belt" of the entire wound roll were visually evaluated. In addition, the winding is performed until the rotation of the turret (the winding length up to 3800 m, the following is the inner circumferential side) and after the rotation (the winding length is up to 3800 m to 4000 m. The following is marked as The winding of the outer peripheral side was evaluated by visual observation of three items of "turtle-shell depression", "crimp angle", and "ear depression".

(Evaluation criteria for evaluation items)

<Wound Deviation> The degree of uniformity or chaos of the end surface (side surface) of the wound roll was evaluated at three levels of ○, Δ, and ×.

○ The deviation amount of the end surface of the winding roll (the difference between the largest convex portion and the largest concave portion) is less than 3 mm, and the winding posture is beautiful.

△... The amount of deviation of the end face of the winding roll (the difference between the largest convex portion and the largest concave portion) is 3 mm to 10 mm, and the winding deviation can be seen.

×... The amount of deviation of the end face of the winding roll (the difference between the largest convex portion and the largest concave portion) exceeds 10 mm, and the winding posture is poor.

<Black Belt> Also referred to as blocking, it refers to a winding failure in which the film layers in the wound roll are adhered to each other, and as a result, the films are in close contact with each other and a portion having a transparent appearance appears. When the stress in the winding radial direction is excessively large, the winding failure is deteriorated, and since the air is not wound up to the wound winding at all, the winding failure occurs when the winding is excessively hard. The black belt failure is also evaluated in three levels of ○, △, and ×.

○... no black band was produced on the surface of the wound roll.

△... A black band was produced on a part of the surface of the wound roll.

×... A black belt is produced over substantially the entire area of the wound roll surface.

<turtle-shell-shaped depression> is a winding failure in which a concave deformation (sag, concave deformation) similar to a turtle shell pattern is generated on the surface of the wound winding, and the air carried by the wound winding may be with time. After being discharged, the winding surface collapses, whereby the winding failure occurs. The shell-shaped recess faults were also evaluated in three levels of ○, △, and ×.

○... No shell-like depressions were formed on the surface of the wound roll.

△... A weak shell-like depression was formed in a part of the surface of the wound roll.

×... A strong shell-like depression was generated in a wide range of the surface of the wound roll.

<Volume angle> refers to a winding failure in which the diametrical cross section of the wound winding is not an aesthetically pleasing circular shape, and angular deformation portions are everywhere, and are evaluated in three levels of ○, Δ, and ×. .

○ The cross section of the wound roll in the diametrical direction is a beautiful circular shape, and no wrap angle is generated.

Δ... A weak wrap angle is generated in a part of the cross section of the wound roll in the diameter direction.

×... A strong winding angle is generated in a wide range of the diametrical cross section of the wound roll.

The "ear extension" is also referred to as "ear recess", and is a winding failure in which the vicinity of the knurled portion at both end portions in the film width direction is undulated. If the winding tension is too high, the winding failure is likely to occur, and evaluation is performed at three levels of ○, Δ, and ×.

○... No ear extension occurred at both end portions of the wound roll surface.

Δ... A weak ear extension occurred at both ends of the wound roll surface.

×... Strong ear extension occurred at both ends of the wound roll surface.

(Test Results)

As a result, as shown in Table 1, in Experiment 1 using the conventional film winding device, the "winding deviation" and the "black band" of the wound roll were evaluated as ○. However, the "turtle-shell depression", the "crimp angle", and the "ear extension" on the inner peripheral side of the wound roll were all evaluated as Δ, and the outer peripheral side was evaluated as ×.

In the experiment 2 using the conventional air-pushing film winding device, the "winding deviation" of the wound winding was evaluated as Δ, and the "black belt" was evaluated as ○. In addition, the "turtle-shaped depression", the "crimp angle", and the "ear extension" on the inner peripheral side of the wound roll were all evaluated by ○. However, for the outer peripheral side of the wound roll subjected to the following treatment, the "turtle-shaped depression" and the "crimp angle" are evaluated, and the "ear stretch" is evaluated as Δ, and the treatment means that air is not pressed. The winding tension is increased to thereby remove the carried air.

On the other hand, in Experiment 3 using the air-pushing film winding device of the present invention, the evaluation of "winding deviation" and "black belt" of the wound roll was ○. Further, for the inner circumferential side and the outer circumferential side of the wound roll, the "turtle-shell depression", the "crimp angle", and the "ear extension" were all evaluated.

1, 34. . . Winding roll

2, 32. . . Winding shaft

3, 22. . . Turret

3A. . . Rotary axis

4, 36. . . Air nozzle

5, S. . . Rotating track

10. . . Film winding device

10A. . . Winding drive control unit

12. . . film

13. . . Optical compensation film

14. . . Film production line

16. . . Film winding switching device

16A. . . Winding switching drive control unit

18. . . Controller

20. . . shelf

20A. . . Bottom plate

20B. . . Side panel

twenty four. . . Air ejection unit

26. . . Rotary axis / rotating axis

28. . . Arm plate

28A. . . Extension board

30. . . Boss

31. . . Core

32A. . . First winding shaft / winding shaft

32B. . . Second winding shaft / winding shaft

36A. . . Spray outlet

38. . . Air introduction line

38A. . . Air intake

38B. . . Flexible hose

38C. . . General manager

38D. . . Rotary joint

40. . . Mobile agency

42. . . Air piping

44. . . Linear Motion (LM) track

46. . . LM block

48. . . Slider/nut member

50. . . Ball screw

52. . . motor

54, 116. . . Guide roller

56. . . Support arm

112. . . Delivery machine

114. . . Film bonding device

117. . . Upstream guide roller

118. . . Friction processing device

119. . . Downstream guide roller

120. . . Friction roller

122. . . Dust collector

124. . . Gravure coating device

126. . . Gravure roll

128. . . Liquid tray

129. . . blade

130. . . Initial drying area

132. . . Dry area

134. . . Intermediate area

136. . . Hardened area

138. . . Winding tension control device

138A. . . Bounce roller

L. . . distance

O. . . center

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conceptual view showing a film forming line in which a film winding device of the present invention is assembled to a film.

Fig. 2 is a perspective view of a turret type film winding device of the present invention.

Figure 3 is a side view of a turret-type film winding device of the present invention.

4A is an explanatory view of a moving mechanism for moving an air nozzle of a turret-type film winding device of the present invention.

Fig. 4B is an explanatory view of a moving mechanism for moving an air nozzle of the turret-type film winding device of the present invention.

Fig. 5A is an explanatory view for explaining the operation of the turret-type film winding device of the present invention.

Fig. 5B is an explanatory view for explaining the operation of the turret-type film winding device of the present invention.

Fig. 5C is an explanatory view for explaining the operation of the turret-type film winding device of the present invention.

Fig. 6 is a side view showing another embodiment of the turret-type film winding device of the present invention.

Fig. 7 is a conceptual view showing a manufacturing line in which a turret-type film winding device of the present invention is assembled to an optical compensation film.

8 is an explanatory view for explaining an example of a conventional turret-type film winding device.

10. . . Film winding device

10A. . . Winding drive control unit

12. . . film

20. . . shelf

20A. . . Bottom plate

20B. . . Side panel

twenty two. . . Turret

twenty four. . . Air ejection unit

26. . . Rotary axis / rotating axis

28. . . Arm plate

28A. . . Extension board

30. . . Boss

31. . . Core

32. . . Winding shaft

32A. . . First winding shaft / winding shaft

32B. . . Second winding shaft / winding shaft

34. . . Winding roll

36. . . Air nozzle

36A. . . Spray outlet

38. . . Air introduction line

38A. . . Air intake

38B. . . Flexible hose

38C. . . General manager

38D. . . Rotary joint

40. . . Mobile agency

42. . . Air piping

44. . . Linear Motion (LM) track

46. . . LM block

48. . . Slider/nut member

50. . . Ball screw

52. . . motor

Claims (13)

A film winding device which winds a film around a winding shaft to form a winding roll, and rotates a turret provided with a plurality of the winding shafts around a rotation axis, thereby winding the winding roll from the winding Position moving to move the winding shaft to be wound to the winding position, the film winding device comprising: an air ejection unit, the air ejection unit comprising: an air nozzle that injects air to the winding a surface of the roll, the film being wound is pressed against the surface by the jetted air; the air introduction line is introduced into the air via the hollow shaft formed by the hollow The air nozzle and the moving mechanism maintain the distance between the discharge port of the air nozzle and the surface of the winding roll within a predetermined range, and follow the change in the winding diameter of the winding roll to cause the air nozzle Moving, for each of the winding shafts, the air ejecting unit is integrally provided with the turret, and the air ejecting unit rotates together with the rotation of the turret, and the film winding device is disposed a guide roller that rotates with the turret as the turret rotates, and is wrapped by a film wound around the wound roll, and advances a path of the film wrapped around the guide roll The air ejection unit is disposed inside. The film winding device according to claim 1, wherein the air ejection unit is disposed in a rotation orbit of the turret. The film winding device according to claim 1 or 2, further comprising a rotary joint disposed on the rotating shaft, and the rotary joint is rotatably disposed up to an outer portion of the turret The air pipe until the air source is connected to the rotating shaft. The film winding device according to claim 1 or 2, wherein the moving mechanism maintains a distance between the discharge port of the air nozzle and the surface of the winding roll to 2 mm to 15 mm. The air nozzle moves. The film winding device of claim 1 or 2, wherein the air introduction line branches from the rotating shaft to a manifold provided for each of the air nozzles, and from the The manifold uniformly introduces the air along the width direction of the air nozzle via a plurality of flexible hoses. The film winding device of claim 1 or 2, further comprising a switching mechanism disposed in each of the manifolds, wherein the switching mechanism is capable of flowing from the rotating shaft within 3 seconds The air of each of the air nozzles is switched. The film winding device according to claim 1 or 2, wherein a pair of the moving mechanisms are disposed at both end portions in the width direction of the air nozzle, thereby preventing a pair of the moving mechanisms Dust generated by the driving portion is attached to the film. The film winding device according to the first or second aspect of the invention, wherein the driving portion of the moving mechanism is provided with a cover. The film winding device according to claim 1 or 2, wherein the film has a width of 2000 mm or more. A method for producing a film, comprising: a film forming step of manufacturing a film; and a film winding step of winding the manufactured film by using the film winding device according to claim 1 or 2 . A method for producing an optical film, comprising: a film winding step of winding a film for manufacturing an optical film by using a film winding device according to claim 1 or 2; a coating step, The wound film is subjected to reverse winding to apply an optical coating liquid, and a drying step of drying the applied coating layer. The method for producing an optical film according to claim 11, comprising the product film winding step of using the film winding device according to claim 1 or 2 to manufacture the optical film. Winding is performed. The method for producing an optical film according to claim 11, wherein the optical film is any one of a polarizing plate protective film, an optical compensation film, and an antireflection film of a liquid crystal display device.