WO2018051805A1

WO2018051805A1 - Film conveyance device and film manufacturing method

Info

Publication number: WO2018051805A1
Application number: PCT/JP2017/031436
Authority: WO
Inventors: 浩行森田
Original assignee: 日本ゼオン株式会社
Priority date: 2016-09-13
Filing date: 2017-08-31
Publication date: 2018-03-22
Also published as: JPWO2018051805A1; KR20190045090A; TWI795366B; CN109328174B; CN109328174A; JP6984605B2; KR102391419B1; TW201811653A

Abstract

This film conveyance device is provided with: a turn bar for continuously conveying a film while the film is floated above a conveyance surface due to a fluid emitted from openings, the conveyance surface including a curved surface, an upper flat surface that faces upward, and a lower flat surface that faces downward; and a film supply device that is provided upstream from the turn bar, and supplies the film to the turn bar in a manner such that an angle formed on the outside of the film between an edge portion on the curved surface side of the turn bar and one edge portion of the film is greater than an angle formed on the outside of the film between the edge portion on the curved surface side of the turn bar and the other edge portion of the film. The floating amount at the one edge portion of the film conveyed on the upper flat surface of the turn bar is larger than the floating amount at the other edge portion.

Description

Film conveying apparatus and film manufacturing method

The present invention relates to a film transport apparatus for transporting a long film; and a film manufacturing method including transporting a film using the film transport apparatus.

Films such as resin films are often manufactured in a long shape. When manufacturing such a long film, each process in a manufacturing method is normally performed, conveying the said film continuously in the longitudinal direction.

When performing film production as described above, it may be required to change the film transport direction. For example, in a factory, there may be restrictions on the locations where manufacturing equipment can be installed, and in order to install manufacturing equipment within the scope of such restrictions, the film transport path is bent and the film transport direction is changed. May be required to do. As described above, a turn bar is known as a device for changing the film conveyance direction (see Patent Document 1).

Japanese Patent No. 5152477

The turn bar usually has a plurality of openings through which air can be ejected, and the film is folded while the film is floated by the air ejected from the openings. However, when the turn bar is used, the film may be damaged. Specifically, when changing the transport direction of the film entering obliquely with respect to the extending direction of the turn bar with the turn bar, the film after the transport direction is changed by the turn bar may be damaged. Although this scratch is small, the quality may be impaired depending on the application. For example, in an optical film, even a small scratch may cause damage to optical characteristics, and thus it is required to suppress the generation thereof.

The present invention was devised in view of the above problems, and is a film transport apparatus capable of changing the transport direction of a long film while suppressing the occurrence of scratches; and a long film while transporting so as not to cause scratches. It aims at providing the film manufacturing method which can manufacture a film.

[1] A film transport apparatus for transporting a long film;
A turn bar having a transport surface formed with a plurality of openings through which fluid can be ejected, and continuously transporting the film in a state where the film is suspended from the transport surface by the fluid ejected from the opening. ,
The transport surface is
Curved surface,
Continuous with one of the upstream or downstream of the curved surface, and an upward upper surface in the direction of gravity;
A turn bar that includes a lower plane that is continuous with the other upstream or downstream of the curved surface and that faces downward in the direction of gravity; and
Provided upstream of the turn bar;
When the upper plane is viewed from above in the direction of gravity, the angle formed by the edge on the curved surface side of the turn bar and one edge of the film on the outside of the film is the edge on the curved surface side of the turn bar. A film supply device for supplying the film to the turn bar such that the other edge of the film is larger than an angle formed outside the film;
The amount of floating at the one edge of the film conveyed on the upper plane of the turn bar is greater than the amount of floating at the other edge of the film conveyed on the upper plane of the turn bar. Film transport device.
[2] The one edge portion of the film which is provided on the downstream side of the turn bar and is transported on the upper plane of the turn bar by adjusting the transport direction of the film sent from the turn bar, [1] The film transport apparatus according to [1], further comprising an adjustment roll that causes the upper surface of the turn bar to be more loose than the other edge of the film that is transported.
[3] The film transport device according to [2], further including a transport direction correcting device that changes a transport direction of the film fed from the adjustment roll.
[4] A method for producing a film, comprising transporting a long film using the film transport apparatus according to any one of [1] to [3].

According to the present invention, a film transport apparatus capable of changing the transport direction of a long film while suppressing generation of scratches; and a film manufacturing method capable of manufacturing a long film while transporting so as not to generate scratches. Can be provided.

FIG. 1 is a plan view schematically showing a film transport apparatus according to the first embodiment of the present invention. FIG. 2 is a side view schematically showing the turn bar used in the first embodiment of the present invention as seen from the extending direction of the turn bar. FIG. 3 is a plan view schematically showing a film transport apparatus as an example of a conventional film transport apparatus without an adjustment roll. FIG. 4 is a plan view schematically showing a film transport direction in a conventional film transport apparatus without an adjustment roll. FIG. 5 is a plan view schematically showing the film transport direction in the film transport apparatus according to the first embodiment of the present invention. FIG. 6 is a perspective view schematically showing the transport direction correcting device used in the first embodiment of the present invention. FIG. 7 is a plan view schematically showing a turn bar used in the first embodiment of the present invention. FIG. 8 is a plan view schematically showing a film transport apparatus according to the second embodiment of the present invention. FIG. 9 is a plan view schematically showing a film transport apparatus according to the third embodiment of the present invention. FIG. 10 is a side view schematically showing the turn bar used in the third embodiment of the present invention as viewed from the extending direction of the turn bar. FIG. 11 is a plan view schematically showing the film transport direction in the film transport apparatus according to the third embodiment of the present invention. FIG. 12 is a plan view schematically showing a film manufacturing apparatus according to the fourth embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments and examples. However, the present invention is not limited to the following embodiments and exemplifications, and can be implemented with any modifications without departing from the scope of the claims of the present invention and the equivalents thereof.

In the following description, “upstream” and “downstream” indicate upstream and downstream in the film flow direction unless otherwise specified.

In the following description, the directions of the elements “parallel”, “vertical”, and “orthogonal” include errors within a range that does not impair the effects of the present invention, for example, ± 5 °, unless otherwise specified. You may go out.

In the following description, the film transport direction indicates the direction in which the midpoint of the film width direction moves unless otherwise specified.

In the following description, a film represents a long film unless otherwise specified. The long film means a film having a length of 5 times or more, preferably 10 times or more, and specifically wound in a roll shape. It refers to a film having a length that can be stored or transported. Although the upper limit of the length of a long film is arbitrary, it can be made into 100,000 times or less with respect to a width, for example.

[1. First embodiment]
FIG. 1 is a plan view schematically showing a film transport apparatus 1 according to the first embodiment of the present invention. In this plan view, a state in which the film transport apparatus 1 is viewed from above in the direction of gravity is shown.
As shown in FIG. 1, the film transport apparatus 1 according to the first embodiment of the present invention is an apparatus for transporting a long film 10 as a film supply apparatus 200, a turn bar 100, and a floating amount adjustment apparatus. Are provided in this order from the upstream.

[1.1. Turn bar 100]
FIG. 2 is a side view schematically showing the turn bar 100 used in the first embodiment of the present invention as viewed from the extending direction A ₁₀₀ of the turn bar ₁₀₀ (see FIG. 1).
As shown in FIG. 2, the turn bar 100 has a transport surface 100 S as the outer surface of the turn bar 100, and is a member for continuously transporting the film 10 along the transport surface 100 S. In the turn bar 100, the extending direction A _{100 of the} turn bar 100 is usually provided in parallel with the horizontal direction.

The turn bar 100 is formed as a hollow body, and a supply pipe (not shown) for supplying fluid to the hollow body is connected to an end portion 100E in the extending direction. In addition, a plurality of openings (not shown) through which the supplied fluid can be ejected are formed on the transfer surface 100S of the turn bar 100. A liquid may be used as the fluid, but usually a gas such as air is used. And this turn bar 100 is provided so that the film 10 can be conveyed in the non-contact state which suspended the film 10 from the conveyance surface 100S with the fluid which ejects from said opening.

The transport surface 100S is continuous with the curved surface 110S for changing the transport direction of the film 10 and one of the upstream and downstream sides of the curved surface 110S, and is directed upward in the direction of gravity and 120S upstream and downstream of the curved surface 110S. A lower plane 130S that is continuous to the other side and that faces downward in the direction of gravity.

The curved surface 110S is a columnar curved surface extending in the extending direction of the turn bar 100. A cross section obtained by cutting the curved surface 110S along a plane perpendicular to the extending direction of the turn bar 100 has an arc shape.

The upper plane 120S is a plane formed smoothly and continuously with respect to the curved surface 110S. The upper plane 120S is provided in parallel with the conveyance direction of the film 10 passing through the upper plane 120S, and is usually provided in parallel with the horizontal direction. In the present embodiment, an upper plane 120S is provided upstream of the curved surface 110S.

The lower plane 130S is a plane formed smoothly and continuously with respect to the curved surface 110S. The lower plane 130S is provided in parallel with the transport direction of the film 10, and is usually provided in parallel with the horizontal direction. In the present embodiment, a lower flat surface 130S is provided downstream of the curved surface 110S.

The opening of the conveyance surface 100S may be formed on the entire conveyance surface 100S. However, in order to increase the ejection pressure of the fluid from the opening, it is preferable to close the opening formed in the portion of the transport surface 100S where the film 10 does not pass. Therefore, in the present embodiment, description will be given by taking as an example the turn bar 100 in which an opening is formed only in a portion through which the film 10 of the transport surface 100S passes.

The opening of the conveying surface 100S is formed so that the fluid ejected from the opening can flow through the gap between the conveying surface 100S and the film 10. Usually, the opening is formed such that the fluid ejected from the opening flows toward the side opposite to the curved surface 110S. Thus, the upper plane 120S, fluid, as indicated by the arrow _{A 1,} flows into the upper plane 120S a curved surface 110S, is discharged through the end portion 120E of the upper plane 120S. On the other hand, the lower plane 130S, fluid, as indicated by arrow _{A 2,} it flows from the curved 110S to bottom plane 130S, is discharged through the end portion 130E of the lower plane 130S. As a specific shape of the opening, for example, a shape described in Japanese Patent No. 5152477 can be adopted.

[1.2. Film supply apparatus 200]
As shown in FIG. 1, the film supply apparatus 200 is an apparatus that is provided upstream of the turn bar 100 and supplies the film 10 to the turn bar 100. This film supply apparatus 200 is provided so that the film 10 can be supplied to the turn bar 100 so that the conveying direction of the film 10 supplied to the turn bar 100 is oblique to the extending direction A ₁₀₀ of the turn bar 100. . Here, the transport direction of the film 10 is oblique to the extending direction A ₁₀₀ of the turn bar 100, it conveying direction of the film 10 is not a vertical not parallel to the extending direction A ₁₀₀ turn bars 100 Indicates.

Therefore, when the upper plane 120S of the turn bar 100 is viewed from above in the direction of gravity, the film supply apparatus 200 places the film 10 on the turn bar 100 so that the one-side crossing angle θ _i is larger than the other-side crossing angle θ _ii. It can be supplied. Here, the one-edge-side crossing angle θ _i refers to the edge 110E on the curved surface 110S side of the turn bar 100 and one edge of the film 10 in the film width direction when the upper plane 120S of the turn bar 100 is viewed from above in the gravitational direction. The part 11 represents an angle formed outside the film 10. Further, the other-edge-side intersection angle θ _ii refers to the edge 110E on the curved surface 110S side of the turn bar 100 and the other edge of the film 10 in the film width direction when the upper plane 120S of the turn bar 100 is viewed from above in the direction of gravity. 12 represents an angle formed outside the film 10.

When the upper plane 120S of the turn bar 100 is viewed from above the gravity direction, the edge 110E on the curved surface 110S side of the turn bar 100 is usually parallel to the extending direction A ₁₀₀ of the turn bar 100. Therefore, when the conveyance direction of the film 10 supplied to the turn bar 100 is oblique with respect to the extending direction A ₁₀₀ of the turn bar 100 as described above, the one-edge-side intersection angle θ _i and the other-edge-side intersection angle θ _ii Is set as described above. The direction of the turn of the film 10 passing through the turn bar 100 is represented by the relationship between the one-edge-side intersection angle θ _i and the other-edge-side intersection angle θ _ii . Specifically, the relationship between the one-side crossing angle θ _i and the other-edge crossing angle θ _ii indicates whether the turn direction of the film 10 is rightward or leftward.

In order to supply the film 10 to the turn bar 100 as described above, in the present embodiment, the film supply apparatus 200 includes a suction roll 210. The suction roll 210 is provided immediately upstream of the turn bar 100 so that the film 10 can be supplied to the turn bar 100 via the suction roll 210.

The suction roll 210 has a peripheral surface 210S in which a plurality of suction holes (not shown) capable of sucking the film 10 are formed. Specifically, the suction roll 210 has a peripheral portion 211 formed by a mesh member, and is provided so that the film 10 can be sucked by a suction hole corresponding to the mesh of the peripheral portion 211. Further, the suction roll 210 is connected to a driving device (not shown) such as a motor for rotationally driving the suction roll 210, and is provided to be rotatable in the circumferential direction by the driving force of the driving device. The suction roll 210 is provided so that the film 10 can be sent out in a predetermined direction by rotating while sucking the film 10. Usually, the film 10 is fed in a direction perpendicular to the axial direction of the suction roll 210. Further, as described above, the suction roll 210 rotates while sucking the film 10, whereby a desired tension can be applied to the film 10 supplied to the turn bar 100.

The peripheral surface 210S of the suction roll 210 is usually formed of a metal such as stainless steel or nickel. Examples of such a suction roll 210 include those described in JP 2010-173843 A, JP 7-127631 A, and the like.

[1.3. Adjustment roll 300]
When the transport direction of the film 10 supplied to the turn bar 100 is oblique with respect to the extending direction A ₁₀₀ of the turn bar 100 as described above, if no special measures are taken, There is a possibility that the film 10 does not float sufficiently and the film 10 and the turn bar 100 come into contact with each other. Such contact may cause scratches on the film 10. On the other hand, in the film transport apparatus 1 according to the present embodiment, adjustment as a floating amount adjusting device is performed in order to sufficiently increase the floating amount of the film 10 at one edge 11 and suppress the generation of scratches. A roll 300 is provided.

The adjustment roll 300 is a roll for adjusting the floating amount of the film 10 conveyed on the upper plane 120S of the turn bar 100, and is provided downstream of the turn bar 100 in this embodiment as shown in FIG. Here, the floating amount of the film 10 represents a distance C between the upper plane 120S of the turn bar 100 and the film 10, as shown in FIG.

Specifically, the adjustment roll 300 determines the floating amount at one edge 11 of the film 10 conveyed on the upper plane 120S of the turn bar 100, and the other edge of the film 10 conveyed on the upper plane 120S of the turn bar 100. It is provided so as to be larger than the floating amount in the part 12. More specifically, the adjustment roll 300 is provided so as to be movable and rotatable in the horizontal direction so that the position and the axial direction viewed from above in the direction of gravity can be adjusted. And the adjustment roll 300 adjusts the conveyance direction of the film 10 sent out from the turn bar 100, whereby one edge 11 of the film 10 conveyed on the upper plane 120 S of the turn bar 100 is replaced with the upper plane 120 of the turn bar 100. It is provided so that it may be loosened rather than the other edge 12 of the film 10 conveyed.

In the present embodiment, the adjustment roll 300 has a peripheral surface 300S in which a plurality of suction holes (not shown) capable of sucking the film 10 are formed. Further, the adjusting roll 300 is connected to a driving device (not shown) such as a motor for rotationally driving the adjusting roll 300, and is provided to be rotatable in the circumferential direction by the driving force of the driving device. . And since the adjustment roll 300 pulls the film 10 by rotating while sucking the film 10, the transport direction of the film 10 sent from the turn bar 100 is set according to the position and the axial direction of the adjustment roll 300. It is provided so that it can be adjusted.

Hereinafter, the adjustment using the adjustment roll 300 in the conveyance direction of the film 10 delivered from the turn bar 100 will be described in comparison with a conventional film conveyance apparatus without the adjustment roll 300 as a floating amount adjustment apparatus.

FIG. 3 is a plan view schematically showing a film transport device 9 as an example of a conventional film transport device without the adjusting roll 300. FIG. 4 is a plan view schematically showing the film transport direction in the film transport device 9. In these plan views, a state in which the film transport device 9 is viewed from above in the direction of gravity is shown. In FIG. 4, the conveyance direction of the film 10 supplied to the turn bar 100 is indicated by an arrow A ₄₁ , and the conveyance direction of the film 10 delivered from the turn bar 100 is indicated by an arrow A ₄₂ . In FIG. 4, for easy understanding, the change in the turn bar 100 from the transport direction A ₄₁ of the film 10 to the transport direction A ₄₂ is shown as a square change, but actually the turn bar 100 has a curved surface 110S. Therefore, the change from the transport direction A ₄₁ of the film 10 to the transport direction A ₄₂ in the turn bar 100 is usually an arc-shaped change.

As shown in FIG. 3, in the conventional film transport apparatus 9 without the adjustment roll 300, the film 10 is supplied from the suction roll 210 of the film supply apparatus 200 to the turn bar 100. When viewed from above in the direction of gravity, as shown in FIG. 4, the film 10 is usually fed out in a transport direction A ₄₁ perpendicular to the axial direction of the suction roll 210.

As shown in FIG. 3, the film 10 supplied to the turn bar 100 is conveyed from the turn bar 100 after being conveyed along the conveyance surface 100 S of the turn bar 100. By being transported along the transport surface 100S of the turn bar 100 in this way, the transport direction A ₄₁ of the turn bar 100 changes to the transport direction A _{42 as shown in} FIG. At this time, when viewed from above in the direction of gravity, the entrance angle φ _{I1 at} which the film 10 enters the turn bar 100 and the delivery angle φ _O1 at which the film 10 is sent from the turn bar 100 are usually the same size. Here, the approach angle φ _I1 is an angle formed by the transport direction A _{41 of the} film 10 supplied to the turn bar 100 with respect to the plane X perpendicular to the extending direction A ₁₀₀ of the turn bar 100 (0 ° <φ _I1 < 90 °). Further, the delivery angle φ _O1 is an angle (0 ° <φ _O1 <90) formed by the conveyance direction A _{42 of the} film 10 delivered from the turn bar 100 with respect to the plane X perpendicular to the extending direction A ₁₀₀ of the turn bar 100. °).

Therefore, in the conventional film transport apparatus 9 without the adjustment roll 300, the transport direction A _{41 of the} film 10 supplied to the turn bar 100 and the transport direction A _{42 of the} film 10 sent from the turn bar 100 as viewed from above in the gravity direction. If the magnitude of the angle between the two is represented by “2 × Φ”, the magnitude of the delivery angle φ _O1 is represented by “Φ”.

In contrast, in the film transport apparatus 1 including the adjustment roll 300, the adjustment roll 300 adjusts the transport direction of the film 10 sent from the turn bar 100 as shown in FIG. The change in the transport direction of the film 10 at this time is shown in FIG.

FIG. 5 is a plan view schematically showing the film transport direction in the film transport apparatus 1 according to the first embodiment of the present invention. In this plan view, a state in which the film transport apparatus 1 is viewed from above in the direction of gravity is shown. In FIG. 5, the conveyance direction of the film 10 supplied to the turn bar 100 is indicated by an arrow A ₅₁ , and the conveyance direction of the film 10 delivered from the turn bar 100 is indicated by an arrow A ₅₂ . Further, in FIG. 5, conventional in the film transport device 9 without adjusting roll 300, the conveying direction A ₄₂ the film 10 fed from the turn bar 100, indicated by the arrows in two-dot chain line. In FIG. 5, for easy understanding, a change from the conveyance direction A ₅₁ of the film 10 in the turn bar 100 to the conveyance direction A ₅₂ is shown as a square change, but actually the turn bar 100 has a curved surface 110S. Therefore, the change from the transport direction A ₅₁ of the film 10 to the transport direction A ₅₂ in the turn bar 100 is usually an arc-shaped change.

As shown in FIG. 5, the adjusting roll 300 is configured such that the size of the sending angle φ _O2 of the transport direction A ₅₂ of the film 10 sent from the turn bar 100 is larger than the size “Φ” of the sending angle φ _O1. Adjust so that it is smaller. Since the film 10 upstream is constrained by the suction roll 210, the adjustment roll 300 to adjust the conveying direction A ₅₂ of the film 10 as described above, as shown in FIG. 1, is conveyed on the plane 120S of the turn bar 100 The tension at one edge 11 of the film 10 is reduced, and the tension at the other edge 12 of the film 10 conveyed on the upper plane 120S of the turn bar 100 is increased. Thereby, one edge part 11 of the film 10 conveyed on the upper plane 120S of the turn bar 100 becomes looser than the other edge part 12 of the film 10 conveyed on the upper plane 120S of the turn bar 100.

The angle difference Δφ (see FIG. 5) between the sending angle φ _O1 of the film 10 in the conventional film transport device 9 without the adjusting roll 300 and the sending angle φ _O2 of the film 10 in the film transport device 1 including the adjusting roll 300 is It can adjust arbitrarily in the range which can suppress the damage | damage of the film 10. FIG. Specifically, the angle difference Δφ can be set in a range greater than 0 ° and less than or equal to 5 °, for example.

As described above, when one edge portion 11 of the film 10 conveyed on the upper plane 120S of the turn bar 100 is slackened, it can easily float by the force from the fluid ejected from the opening formed on the conveyance surface 100S of the turn bar 100. As a result, the amount of floating at the one edge 11 can be increased. The floating amount of the one edge portion 11 can be arbitrarily adjusted within a range in which damage to the film can be suppressed. In order to effectively suppress damage, it is preferable to adjust the floating amount of one edge portion 11 to, for example, about twice the floating amount of the other edge portion 12.

The film transport apparatus 1 may be provided with a mechanism for controlling the tension of the film 10, and an adjustment roll 300 may be used as a mechanism for controlling the tension. For example, the film transport apparatus 1 is based on a tension pickup roll (not shown) for measuring the tension of the film 10 in the transport path from the suction roll 210 to the adjustment roll 300 and the tension measured by the tension pickup roll. When a driving roll (not shown) for conveying and driving the film 10 is provided, the tension of the film 10 can be controlled in the conveying path from the suction roll 210 to the adjusting roll 300 by controlling the driving of the driving roll. . At this time, the adjustment roll 300 can be used as the drive roll as described above. Further, in the above-described tension control, if the drive roll feedback control using the tension measured by the tension pickup roll is performed, more precise tension control is possible. In the present embodiment, an example in which the tension of the film 10 is controlled by the adjustment roll 300 will be described.

[1.4. Transport direction correcting device 400]
When the conveyance direction of the film 10 is adjusted by the adjustment roll 300 as described above, the conveyance direction of the film 10 may deviate from a desired direction downstream from the adjustment roll 300 as shown in FIG. In order to correct such a shift in the transport direction, the film transport apparatus 1 preferably includes a transport direction correcting apparatus 400. The conveyance direction correction apparatus 400 is an apparatus for changing the conveyance direction of the film 10 delivered from the adjustment roll 300, and for example, an apparatus including a roll can be used.

FIG. 6 is a perspective view schematically showing the transport direction correcting device 400 used in the first embodiment of the present invention.
As shown in FIG. 6, the transport direction correcting device 400 includes guide rolls 410, 420, 430, and 440 in this order from the upstream.

The guide rolls 420 and 430 are provided on the rotating base 450. Further, as shown by an arrow A ₆₁ in FIG. 6, the rotating base 450 is provided so as to be able to turn in the horizontal direction. This turning is an arcuate turning around the turning axis passing through the central portion of the guide roll 420 in the axial direction. Here, the above-mentioned turning axis does not mean a specific member, but means a virtual axis shown for explaining the center of turning of the rotating base 450. With the turning of the rotating base 450, the guide rolls 420 and 430 are turned in conjunction with each other, and the angle of the rotation shaft of the guide rolls 420 and 430 is adjusted. Then, by adjusting the angle of the rotation axis of the guide rolls 420 and 430, the frictional force between the film 10 and the guide rolls 420 and 430 is distributed in the width direction of the film 10, and the conveyance direction of the film 10 is changed. Will be corrected. Therefore, the conveyance direction correcting device 400 is provided so that the conveyance direction of the film 10 can be corrected to a desired direction by adjusting the turning angle of the rotating base 450.

Moreover, the said conveyance direction correction apparatus 400 can control the conveyance direction correction apparatus 400 based on the suitable sensor (illustration omitted) which can detect the conveyance direction of the film 10, and the upper direction of the conveyance direction detected by the said sensor. A controller (not shown) may be provided. As such a conveyance direction correcting device 400, for example, a center position control device (CPC device), an edge position control device (EPC device), etc. manufactured by Nireco Corporation can be used.

[1.5. Method for Conveying Film 10 Using Film Conveying Device 1]
The film conveyance apparatus 1 which concerns on 1st embodiment of this invention has the structure mentioned above. When the film 10 is transported using the film transport apparatus 1, the film 10 is supplied to the film supply apparatus 200 as shown in FIG. Then, the supplied film 10 is conveyed to the turn bar 100 in a state where a predetermined tension is given by the adjustment roll 300.

The film 10 conveyed to the turn bar 100 is conveyed on the conveyance surface 100S of the turn bar 100 in the order of the upper plane 120S, the curved surface 110S, and the lower plane 130S. Specifically, the film 10 is conveyed on the upper plane 120S of the turn bar 10, and the conveyance direction is changed by being conveyed on the curved surface 110S, and is then conveyed so as to pass through the lower plane 130S. At this time, since the fluid is ejected from the opening formed in the conveyance surface 100S of the turn bar 100, the film 10 is floating from the conveyance surface 100S, and therefore does not contact the conveyance surface 100S.

FIG. 7 is a plan view schematically showing the turn bar 100 used in the first embodiment of the present invention. This plan view shows a state where the turn bar 100 is viewed from above in the direction of gravity. Further, in FIG. 7, the boundary between the curved surface 110 S of the conveyance surface 100 S of the turn bar 100 and the upper plane 120 S is indicated by a one-dot chain line.

As shown in FIG. 7, the film 10 conveyed so as to pass through the upper plane 120 S is conveyed in a floating state by a fluid ejected from an opening formed on the conveyance surface 100 S of the turn bar 100. In the above plane 120S, fluid flows into the upper plane 120S from the curved 110S (see arrow _{A 1} in FIG. 2).

At this time, the other edge 12 of the film 10, as shown by arrow A _12, the fluid between the film 10 and the upper plane 120S flows stably. Therefore, the other edge portion 12 of the film 10 can obtain a sufficient floating force.
On the other hand, the one edge 11 of the film 10, as shown by arrow A _11, the fluid is easily released to the outside between the film 10 and the upper plane 120S. Therefore, it is difficult to obtain sufficient floating force at one edge 11 of the film 10. Therefore, conventionally, at one edge 11 of the film 10, the floating amount of the film 10 tends to be small due to the action of its own weight and tension, and as a result, the film 10 comes into contact with the upper plane 120S of the turn bar 100. I was hurt. Further, when the film 10 comes into contact with the upper plane 120S of the turn bar 100, the conveyance position of the film 10 may be shifted or the film 10 may meander due to a shock of contact.

On the other hand, in this embodiment, when the adjustment roll 300 adjusts the conveyance direction of the film 10, the one edge part 11 of the film 10 conveyed by the upper plane 120S is the film 10 conveyed by the upper plane 120S. It is slacker than the other edge 12 of. Therefore, at one edge 11 of the film 10, the action of tension is reduced. Therefore, one edge portion 11 of the film 10 can float significantly even if the floating force applied from the fluid ejected from the opening formed on the transport surface 100S of the turn bar 100 is small. Therefore, the floating amount at one edge portion 11 of the film 10 conveyed on the upper plane 120S is larger than the floating amount at the other edge portion 12 of the film 10 conveyed on the upper plane 120S. And since such a big floating amount is obtained, since one edge part 11 of the film 10 is hard to contact the upper plane 120S when conveyed on the upper plane 120S, a damage is suppressed. Moreover, normally, even when the floating amount at one edge 11 of the film 10 is increased as described above, the floating amount at the other edge 12 of the film 10 can be secured. For example, by appropriately adjusting the pressure of the fluid ejected from the opening of the turn bar 100 and the tension of the film 10, the floating amount at the other edge 12 of the film 10 can be secured. Therefore, since the floating amount of both the

edges

11 and 12 of the film 10 can be sufficiently ensured, it is possible to effectively suppress scratches. Furthermore, since the contact between the film 10 and the turn bar 100 can be suppressed, the shift of the transport position of the film 10 due to the contact and the meandering of the film 10 can be normally suppressed.

After the conveyance surface 100S of the turn bar 100 is conveyed, the film 10 is sent from the turn bar 100 to the adjustment roll 300 as shown in FIG. The film 10 conveyed to the adjustment roll 300 is taken up by the adjustment roll 300. Thus, the conveyance direction of the film 10 sent out from the turn bar 100 is adjusted by being taken up by the adjustment roll 300.

The film 10 taken up by the adjustment roll 300 is then sent to the transport direction correcting device 400. Then, the conveyance direction is changed by the conveyance direction correcting device 400 so as to be a desired direction, and the film is conveyed from the film conveyance device 1. For example, when the adjustment roller 300 and the conveyance direction correction device 400 are added to the existing equipment and the film conveyance device 1 according to the present embodiment is provided, the film conveyance device 1 to the film 10 are usually the adjustment roll 300 and the conveyance direction. The film 10 is sent in the same direction as the conveyance direction A ₄₂ (see FIGS. 4 and 5) before the correction device 400 is added.

As mentioned above, according to the film conveyance apparatus 1 which concerns on 1st embodiment of this invention, since it is possible to suppress the contact with the upper plane 120S of the turn bar 100 and the film 10, generation | occurrence | production of a damage | wound is suppressed. However, the conveyance direction of the film 10 can be changed. Moreover, according to the film conveying apparatus 1 mentioned above, the shift | offset | difference of the conveyance position of the film 10 and the meandering of the film 10 can be normally suppressed.

Moreover, even if the conveyance direction of the film 10 sent out from the turn bar 100 is adjusted with the adjustment roll 300 and the conveyance direction of the film 10 has shifted | deviated from the desired direction, the film conveyance apparatus 1 mentioned above is conveyance direction. The correction device 400 can correct the deviation. Therefore, since the setting of the conveyance direction of the film 10 sent out from the film conveyance apparatus 1 is easy, it is particularly easy to change the conveyance direction of the film 10 to a desired direction.

[2. Second embodiment]
In 1st embodiment mentioned above, embodiment which adjusts the floating amount of the film 10 conveyed by the upper plane 120S of the turn bar 100 using the adjustment roll 300 was shown. However, adjustment of the floating amount of the film 10 is not necessarily performed by the adjustment roll 300, and for example, the turn bar 100 itself may be used. In this case, the turn bar 100 functions as a floating amount adjusting device. The embodiment will be described below.

FIG. 8 is a plan view schematically showing the film transport apparatus 2 according to the second embodiment of the present invention. In this plan view, a state is shown in which the film transport device 2 is viewed from above in the direction of gravity.
As shown in FIG. 8, the film transport apparatus 2 according to the second embodiment of the present invention does not include the adjustment roll 300, and the turn bar 100 itself adjusts the floating amount of the film 10 transported on the upper plane 120S of the turn bar 100. It is provided similarly to the film conveying apparatus 1 which concerns on 1st embodiment except functioning as a floating amount adjustment apparatus for doing.

In the present embodiment, the turn bar 100 is provided so as to be movable and rotatable in the horizontal direction, and is provided so that the position seen from above in the direction of gravity and the extending direction A ₁₀₀ can be adjusted. Then, the position and the extending direction _{A 100} of the turn bar 100, the conveying direction of the film 10 fed from the turn bar 100, the same as the conveying direction _{A 52} of the film 10 in the first embodiment (see FIG. 5.) It has been adjusted so that it can be set. Specifically, in this embodiment, when the upper plane 120S of the turn bar 100 is viewed from above in the direction of gravity, the position and extension of the turn bar 100 are set so that the one-side crossing angle θ _i is smaller than in the first embodiment. The current direction A ₁₀₀ is adjusted.

If the film transport apparatus 2 according to the second embodiment is used, the long film 10 can be transported in the same manner as the film transport apparatus 1 according to the first embodiment. At this time, the contact between the upper plane 120S of the turn bar 100 and the film 10 can be suppressed, so that the conveyance direction of the film 10 can be changed while suppressing generation of scratches. Moreover, according to the film conveying apparatus 2 mentioned above, the same advantage as the film conveying apparatus 1 which concerns on 1st embodiment can be acquired normally.

Further, the film transport apparatus 2 according to the second embodiment may be provided with a drive roll (not shown) for tension control of the film 10. Such a drive roll is usually provided between the turn bar 100 and the conveyance direction correcting device 400.

[3. Third embodiment]
In the first embodiment and the second embodiment described above, when the film 10 is conveyed on the conveyance surface 100S of the turn bar 100, the film 10 is conveyed in the order of the upper plane 120S, the curved surface 110S, and the lower plane 130S. It was. However, the conveyance direction of the film 10 is not limited to the first embodiment and the second embodiment, and the film 10 may be conveyed in the order of the lower plane, the curved surface, and the upper plane. The embodiment will be described below.

FIG. 9 is a plan view schematically showing the film transport device 3 according to the third embodiment of the present invention. In this plan view, a state in which the film transport device 3 is viewed from above in the direction of gravity is shown.
As shown in FIG. 9, the film transport device 3 according to the third embodiment of the present invention includes a film supply device 600, a turn bar 500, an adjustment roll 700 as a floating amount adjustment device, and a transport direction correction device 800. Prepare in this order.

[3.1. Turn bar 500]
FIG. 10 is a side view schematically showing the turn bar 500 used in the third embodiment of the present invention as seen from the extending direction A ₅₀₀ of the turn bar ₅₀₀ (see FIG. 9).
As shown in FIG. 10, the turn bar 500 is provided except that the film 10 conveyed on the conveyance surface 500S of the turn bar 500 is conveyed in the order of the lower plane 530S, the curved surface 510S, and the upper plane 520S. , Provided in the same manner as the turn bar 100 used in the first embodiment.

Therefore, on the conveyance surface 500S of the turn bar 500, the upper plane 520S is formed continuously downstream of the curved surface 510S, and the lower plane 530S is formed continuously upstream of the curved surface 510S. In addition, an opening (not shown) through which fluid supplied to a supply pipe (not shown) connected to the end portion 500E of the turn bar 500 can be ejected is formed on the transfer surface 500S. The turn bar 500, the fluid ejected from said openings, flows through the gap between the conveying surface 500S and the film 10, as shown by arrows _{A 1} and _{A 2,} the upper plane 520S or lower flat surface of a curved surface 510S It distributes to 530S, and is provided so as to be discharged through the end 520E of the upper plane 520S or the end 530E of the lower plane 530S.

[3.2. Film supply device 600]
As shown in FIG. 9, the film supply apparatus 600 is the film supply used in the first embodiment except that the film supply apparatus 600 is provided to supply the film 10 to the lower plane 530S instead of the upper plane 520S of the turn bar 500. Similar to the apparatus 600 is provided.

Therefore, the film supply apparatus 600 includes a suction roll 610 having a peripheral portion 611 formed by a mesh member, and a plurality of suction holes (not shown) capable of sucking the film 10 are formed on the peripheral surface 610S. Yes. The film supply device 600 is provided so that the suction roll 610 rotates while sucking the film 10 so that the film 10 supplied to the turn bar 500 can be fed while applying a desired tension.

Further, the film supply device 600 is provided so as to be able to supply the film 10 to the turn bar 500 so that the conveying direction of the film 10 supplied to the turn bar 500 is inclined with respect to the extending direction A ₅₀₀ of the turn bar 500. Yes. Therefore, when the upper plane 520S of the turn bar 500 is viewed from above the gravitational direction, the film supply device 600 causes the turn bar 500 to place the film 10 so that the one-edge-side intersection angle θ _i is larger than the other-edge-side intersection angle θ _ii. It can be supplied. Here, when the upper plane 520S of the turn bar 500 is viewed from above in the direction of gravity, the one-edge crossing angle θ _i is determined so that the edge 510E on the curved surface 510S side of the turn bar 500 and one edge 11 of the film 10 An angle formed outside of 10 is expressed. Further, the other-edge-side intersection angle θ _ii means that when the upper plane 520S of the turn bar 500 is viewed from above in the direction of gravity, the edge 510E on the curved surface 510S side of the turn bar 500 and the other edge 12 of the film 10 An angle formed outside of 10 is expressed.

[3.3. Adjustment roll 700]
As shown in FIG. 9, the adjustment roll 700 is provided in the same manner as in the first embodiment except that the direction of the transport direction of the film 10 adjusted by the adjustment roll 700 is different from that in the first embodiment. . The direction of the film 10 in the conveyance direction is the direction of the film 10 conveyed from the turn bar 500. The direction of the transport direction of the film 10 is adjusted by the adjusting roll 700 in order to adjust the floating amount of the film 10 transported on the upper plane 520S of the turn bar 500.

Hereinafter, the adjustment using the adjustment roll 700 in the conveyance direction of the film 10 delivered from the turn bar 500 will be described.

FIG. 11 is a plan view schematically showing the film transport direction in the film transport apparatus 3 according to the third embodiment of the present invention. In this plan view, a state in which the film transport device 3 is viewed from above in the direction of gravity is shown. In FIG. 11, the conveyance direction of the film 10 supplied to the turn bar 500 is indicated by an arrow A ₁₁₁ , and the conveyance direction of the film 10 delivered from the turn bar 500 is indicated by an arrow A ₁₁₂ . Further, in FIG. 11, the conveyance direction A ₁₁₃ of the film 10 delivered from the turn bar 500 in a conventional film conveyance device without the adjustment roll 700 is indicated by a two-dot chain line arrow. Further, in FIG. 11, a surface perpendicular to the extending direction A ₅₀₀ of the turn bar 500 is indicated by a symbol X. In FIG. 11, for easy understanding, the change from the conveyance direction A ₁₁₁ to the conveyance direction A ₁₁₂ of the film 10 in the turn bar 500 is shown as a square change, but the turn bar 500 actually has a curved surface 510S. Therefore, the change from the conveyance direction A ₁₁₁ to the conveyance direction A ₁₁₂ of the film 10 in the turn bar 500 is usually an arc-shaped change.

As described in the first embodiment, in the conventional film transport apparatus without the adjusting roll 700, generally, when viewed from above in the direction of gravity, the entrance angle at which the film 10 enters the turn bar 500, and the film 10 is delivered from the turn bar 500. the delivery angle being generally the same size (see approach angle phi _I1 and delivery angle phi _O1 shown in FIG. 4). Therefore, in the conventional film transport apparatus without the adjustment roll 700, the transport direction A _{111 of the} film 10 supplied to the turn bar 500 and the transport direction A _{113 of the} film 10 sent from the turn bar 500 are viewed from above in the direction of gravity. When the magnitude of the angle formed by is represented by “2 × Φ”, the magnitude of the delivery angle is represented by “Φ”.

On the other hand, as shown in FIG. 11, the adjustment roll 700 according to the present embodiment has a conveyance angle A ₁₁₂ of the film 10 delivered from the turn bar 500 and the size of the delivery angle φ _O2 of the adjustment roll 700. It adjusts so that it may become larger than the magnitude | size "Φ" of the delivery angle in the conventional film conveyance apparatus which does not exist. As a result, as shown in FIG. 9, in the film 10 conveyed on the upper flat surface 520 S of the turn bar 500, the tension at one edge 11 decreases and the tension at the other edge 12 increases. Accordingly, as in the first embodiment, one edge portion 11 of the film 10 conveyed on the upper flat surface 520S of the turn bar 500 is more slack than the other edge portion 12 of the film 10 conveyed on the upper flat surface 520S. . Thereby, the floating amount at one edge portion 11 of the film 10 conveyed on the upper plane 520S becomes larger than the floating amount at the other edge portion 12 of the film 10 conveyed on the upper plane 520S. Can be adjusted as follows.

The angle difference Δφ (see FIG. 11) between the delivery angle of the film 10 in the conventional film transport device without the adjustment roll 700 and the delivery angle φ _O2 of the film 10 in the film transport device 3 provided with the adjustment roll 700 is as follows. It can be arbitrarily adjusted within a range where scratches can be suppressed. Specifically, the angle difference Δφ can be set in a range greater than 0 ° and less than or equal to 5 °, for example.

[3.4. Transport direction correcting device 800]
As shown in FIG. 9, the conveyance direction correction apparatus 800 is provided so that the shift | offset | difference from the desired direction of the conveyance direction of the film 10 sent from the adjustment roll 700 may be corrected similarly to 1st embodiment. Yes.

[3.5. Method for Conveying Film 10 Using Film Conveying Device 3]
The film transport apparatus 3 according to the third embodiment of the present invention has the above-described structure. When the film 10 is transported using the film transport device 3, the film 10 is supplied to the film supply device 600 as shown in FIG. Similarly to the first embodiment, the film 10 is conveyed to the turn bar 500 in a state where a predetermined tension is applied by the adjustment roll 700.

The film 10 conveyed to the turn bar 500 is conveyed on the conveyance surface 500S of the turn bar 500 in the order of the lower plane 530S, the curved surface 510S, and the upper plane 520S. At this time, the adjustment roll 700 adjusts the conveyance direction of the film 10, whereby one edge 11 of the film 10 conveyed on the upper plane 520 S and the other edge 12 of the film 10 conveyed on the upper plane 520 S. More slack than. Therefore, as in the first embodiment, the floating amount at one edge 11 of the film 10 conveyed on the upper plane 520S is the floating amount at the other edge 12 of the film 10 conveyed on the upper plane 520S. Is bigger than. And since such a big floating amount is obtained, since one edge part 11 of the film 10 is hard to contact the upper plane 520S when conveying the upper plane 520S, a damage is suppressed.

Thereafter, the film 10 is sent from the turn bar 500 to the adjustment roll 700 and is sent to the transport direction correcting device 800 through the adjustment roll 700. Then, similarly to the first embodiment, the transport direction is corrected by the transport direction correcting device 800 so that the transport direction becomes a desired direction, and the film is transported from the film transport device 3.

As mentioned above, according to the film conveyance apparatus 3 which concerns on 3rd embodiment of this invention, the conveyance direction of the film 10 is changed, suppressing generation | occurrence | production of a flaw like the film conveyance apparatus 1 which concerns on 1st embodiment. it can. Furthermore, according to the film conveyance apparatus 3 which concerns on 3rd embodiment of this invention, the same advantage as the film conveyance apparatus 1 which concerns on 1st embodiment can be acquired.

[4. Fourth embodiment]
Usually, the conveyance of the film using the film conveyance apparatus mentioned above is implemented in the film manufacturing method which manufactures a elongate film. Therefore, the film manufacturing method of this invention includes conveying a elongate film using the film conveying apparatus mentioned above.

Examples of the film manufacturing method as described above include a film manufacturing method including a step of forming a film material to obtain a long film and a step of transporting the obtained film using a film transport device. It is done. In such a film manufacturing method, the manufactured film can be conveyed and recovered while suppressing the occurrence of scratches.

In addition, as the film transport method as described above, for example, there is a film manufacturing method including a step of transporting a long film using a film transport device and a step of performing an appropriate processing on the transported film. Can be mentioned. In such a film manufacturing method, a film prepared for use in processing can be conveyed to a processing apparatus while suppressing the occurrence of scratches, and appropriate processing can be performed. Hereinafter, an embodiment of this film manufacturing method will be described.

FIG. 12 is a plan view schematically showing the film manufacturing apparatus 4 according to the fourth embodiment of the present invention. This plan view shows a state where the film manufacturing apparatus 4 is viewed from above in the direction of gravity.
As shown in FIG. 12, the film manufacturing apparatus 4 according to the fourth embodiment of the present invention includes a film transport apparatus 1 provided in the same manner as the first embodiment, and a process provided downstream of the film transport apparatus 1. A stretching apparatus 900 is provided as an apparatus.

The stretching apparatus 900 is an apparatus that is supplied with the film 10 from the transport direction correcting apparatus 400 of the film transport apparatus 1 and performs a stretching process as a processing process on the film 10. An example of such a stretching device 900 is a tenter device. The tenter device includes a clip that can hold both ends of the film 10 in the width direction, and the film 10 can be stretched by pulling the film 10 with the clip.

In the film manufacturing method using the film manufacturing apparatus 4, the film 10 is stretched while being transported in the order of the film transport apparatus 1 and the stretching apparatus 900. Therefore, this film manufacturing method includes conveying the film 10 using the film conveying apparatus 1 and applying a stretching process to the conveyed film 10 using the stretching apparatus 900. At this time, since the film 10 can be transported by the film transport device 1 and the transport direction of the film 10 can be changed to a desired direction, the film manufacturing method can be carried out even in a factory where the manufacturing facility can be installed. It is. Moreover, since the film conveying apparatus 1 is used, the conveyance direction of the film 10 can be changed while suppressing the occurrence of scratches, and further, the same advantages as in the first embodiment can be obtained.

The film manufacturing apparatus 4 as described above, for example, by providing an adjustment roll 300 and a conveyance direction correction apparatus 400 as a floating amount adjustment apparatus in an existing facility including the turn bar 100, the film supply apparatus 200, and the stretching apparatus 900, realizable. At this time, since there is the transport direction correcting device 400, the transport direction of the film 10 sent from the film transport device 1 does not have to be changed from the existing equipment. Therefore, since the position adjustment of the existing apparatus like the extending | stretching apparatus 900 is unnecessary, application to the existing equipment is easy. Moreover, since the fluctuation | variation of the conveyance position of the film 10 can be suppressed with the conveyance direction correction apparatus 400, when the tenter apparatus is used as the stretching apparatus 900, the film can be stably held by the left and right clips.

[5. Modified example]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, You may implement it further changing.
For example, in the embodiment in which the film 10 is conveyed in the order of the lower flat surface 530S, the curved surface 510S, and the upper flat surface 520S of the turn bar 500 as in the third embodiment, as in the second embodiment, the adjustment roll 700 is used as the floating amount adjustment device. Instead, the turn bar 500 may be used. As a specific example, when the upper plane 520S of the turn bar 500 is viewed from above in the direction of gravity, the position of the turn bar 500 and the extending direction A ₅₀₀ so that the one-side crossing angle θ _i is smaller than in the third embodiment. By adjusting this, the floating amount of the film 10 at one edge 11 can be made sufficiently large, and the generation of scratches can be suppressed.

Further, for example, in the above-described embodiment, a film supply device including a device other than the suction roll may be used. Although the specific structure of a film supply apparatus is arbitrary, what can cut the tension | tensile_strength of the film 10 is preferable upstream and downstream of the said film supply apparatus. For example, you may employ | adopt the film supply apparatus provided with the nip roll which can pinch | interpose the film 10 and can cut tension | tensile_strength.

Further, for example, in the fourth embodiment, the processing process may be a process other than the stretching process. Specific examples of the processing include a bonding process, a cut process, a coating process, and a winding process.

[6. the film]
Arbitrary films can be used for conveyance by the film conveyance apparatus mentioned above. Among them, since the effect of effectively suppressing scratches can be effectively utilized, surface-treated films such as coating films and printing films that have a large influence on scratches on film quality; films that are easily scratched such as resin films; It is preferable.

Since the scratch can be effectively suppressed as described above, an optical film having high transparency is particularly preferable. The total light transmittance of the optical film is preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more. The total light transmittance can be measured in a wavelength range of 400 nm to 700 nm using an ultraviolet / visible spectrometer. The haze of the optical film is preferably 5% or less, more preferably 3% or less, particularly preferably 1% or less, and ideally 0%. Here, the haze can be measured at five locations using “turbidity meter NDH-300A” manufactured by Nippon Denshoku Industries Co., Ltd. in accordance with JIS K7361-1997, and the average value obtained therefrom can be adopted.

The thickness of the film may be arbitrarily set according to the use of the film, preferably 1 μm or more, more preferably 5 μm or more, particularly preferably 10 μm or more, preferably 1000 μm or less, more preferably 300 μm or less, particularly Preferably it is 100 micrometers or less.

1, 2, 9 Film conveying device 10 Film 11 One edge of film 12 Other edge of

film

100, 500

Turn bar

100S, 500S Turn

bar conveying surface

100E, 500E End of extending direction of

turn bar

110S, 510S Turn bar

Curved surface

110E,

510E Edges

120S, 520S Turn bar

upper plane

120E, 520E Upper plane end 130S, 530S Turn bar

lower plane

130E, 530E

Bottom Plane end

200, 600

Film supply device

210, 610

Suction roll

211, 611

Suction roll circumference

210S, 610S

Suction roll circumference

300, 700 Adjustment roll 300S

Adjustment roll circumference

400, 800 Conveying direction

Positive devices

410, 420, 430 and 440 guide roll 900 stretching device

Claims

A film transport device for transporting a long film;
A turn bar having a transport surface formed with a plurality of openings through which fluid can be ejected, and continuously transporting the film in a state where the film is suspended from the transport surface by the fluid ejected from the opening. ,
The transport surface is
Curved surface,
Continuous with one of the upstream or downstream of the curved surface, and an upward upper surface in the direction of gravity;
A turn bar that includes a lower plane that is continuous with the other upstream or downstream of the curved surface and that faces downward in the direction of gravity; and
Provided upstream of the turn bar;
When the upper plane is viewed from above in the direction of gravity, the angle formed by the edge on the curved surface side of the turn bar and one edge of the film on the outside of the film is the edge on the curved surface side of the turn bar. A film supply device for supplying the film to the turn bar such that the other edge of the film is larger than an angle formed outside the film;
The amount of floating at the one edge of the film conveyed on the upper plane of the turn bar is greater than the amount of floating at the other edge of the film conveyed on the upper plane of the turn bar. Film transport device.
The one edge portion of the film that is transported on the upper plane of the turn bar is provided on the downstream side of the turn bar and adjusts the transport direction of the film that is fed from the turn bar. The film conveyance apparatus of Claim 1 provided with the adjustment roll which makes it looser rather than the said other edge part of the said film conveyed on an upper plane.
The film transport device according to claim 2, further comprising a transport direction correcting device that changes a transport direction of the film fed from the adjustment roll.
A film manufacturing method comprising conveying a long film using the film conveying apparatus according to any one of claims 1 to 3.