CN109328174B - Film conveying device and film manufacturing method - Google Patents

Film conveying device and film manufacturing method Download PDF

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Publication number
CN109328174B
CN109328174B CN201780037331.4A CN201780037331A CN109328174B CN 109328174 B CN109328174 B CN 109328174B CN 201780037331 A CN201780037331 A CN 201780037331A CN 109328174 B CN109328174 B CN 109328174B
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Prior art keywords
film
conveying
edge portion
steering rod
steering
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CN201780037331.4A
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CN109328174A (en
Inventor
森田浩行
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Zeon Corp
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Zeon Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3322—Turning, overturning according to a determined angle
    • B65H2301/33224—180°
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Advancing Webs (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A film conveying device comprises a steering rod, a film conveying device and a film conveying device, wherein the steering rod continuously conveys the film in a state that the film floats from a conveying surface through fluid sprayed from an opening, and the conveying surface comprises a curved surface, an upward upper plane and a downward lower plane; and a film supply device provided upstream of the steering rod, the film supply device supplying the film to the steering rod in such a manner that an angle formed by an edge portion on the curved surface side of the steering rod and one edge portion of the film on the outside of the film is larger than an angle formed by the edge portion on the curved surface side of the steering rod and the other edge portion of the film on the outside of the film, the amount of floating at the one edge portion of the film conveyed on the upper plane of the steering rod being larger than the amount of floating at the other edge portion.

Description

Film conveying device and film manufacturing method
Technical Field
The present invention relates to a film conveying apparatus for conveying a long film; and a film production method including a step of conveying a film using the film conveying apparatus.
Background
Films such as resin films are often produced in a long shape. When such a long film is produced, each step in the production method is generally performed while continuously conveying the film in the longitudinal direction thereof.
In the case of film production as described above, the film conveyance direction may need to be changed. For example, there are some restrictions on the places where manufacturing equipment can be installed in a factory, and in order to install manufacturing equipment within such a restricted range, it is sometimes necessary to change the film transport direction by bending the film transport path. As a device for changing the film transport direction as described above, a turning bar (see patent document 1) is known.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5152477.
Disclosure of Invention
Problems to be solved by the invention
The steering rod generally has a plurality of openings through which air can be ejected, and turns back the film while floating the film by the air ejected from the openings. However, when the steering rod is used, the film may be scratched. Specifically, when the direction of transport of the film entering obliquely to the direction in which the steering rod extends is changed by the steering rod, the film may be scratched after the direction of transport is changed by the steering rod. Although the scratch is small, the quality of the scratch may be deteriorated depending on the application. For example, in an optical film, even a small flaw may cause deterioration of optical characteristics, and therefore, it is necessary to suppress the occurrence thereof.
The present invention has been made in view of the above-described problems, and an object thereof is to provide a film transport apparatus capable of changing the transport direction of a long film while suppressing the occurrence of a flaw, and a film production method capable of producing a long film while transporting the film without causing a flaw.
Means for solving the problems
[1] A film conveyance device for conveying an elongated film, comprising: a steering rod having a conveying surface in which a plurality of openings capable of ejecting a fluid are formed, the film being continuously conveyed in a state in which the film floats from the conveying surface by the fluid ejected from the openings,
the conveying surface comprises:
a curved surface;
an upper plane which is continuous with the upstream or downstream side of the curved surface and faces upward in the direction of gravity;
a lower plane which is continuous with the other of the upstream and downstream of the curved surface and faces downward in the direction of gravity; and
a film supply device disposed upstream of the steering rod,
supplying the film to the steering lever in such a manner that an angle formed by an edge portion of the steering lever on the curved surface side and one edge portion of the film outside the film is larger than an angle formed by an edge portion of the steering lever on the curved surface side and the other edge portion of the film outside the film when the upper plane is viewed from above in a direction of gravity,
the amount of floating at the one edge portion of the film conveyed on the upper plane of the steering rod is larger than the amount of floating at the other edge portion of the film conveyed on the upper plane of the steering rod.
[2] The film transport apparatus according to [1],
and a regulating roller provided downstream of the steering lever, the regulating roller being configured to regulate a conveying direction of the film fed out from the steering lever so that the one edge portion of the film conveyed on the upper plane of the steering lever is looser than the other edge portion of the film conveyed on the upper plane of the steering lever.
[3] The film transport apparatus according to [2],
the film feeding device includes a feeding direction correcting device for changing the feeding direction of the film fed from the dancer roll.
[4] A film production method comprising a step of conveying a long film by using the film conveying apparatus according to any one of [1] to [3 ].
Effects of the invention
According to the present invention, it is possible to provide a film transport apparatus capable of changing the transport direction of a long film while suppressing the occurrence of a flaw; and a film production method capable of producing a long film while conveying the film without causing scratches.
Drawings
Fig. 1 is a plan view schematically showing a film transport apparatus according to a first embodiment of the present invention.
Fig. 2 is a side view schematically showing the steering rod used in the first embodiment of the present invention when viewed from the extending direction of the steering rod.
Fig. 3 is a plan view schematically showing a film transport apparatus as an example of a conventional film transport apparatus without a dancer roller.
Fig. 4 is a plan view schematically showing a film transport direction in a conventional film transport apparatus without a dancer roller.
Fig. 5 is a plan view schematically showing a 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 a conveying direction correction device used in the first embodiment of the present invention.
Fig. 7 is a plan view schematically showing a steering rod used in the first embodiment of the present invention.
Fig. 8 is a plan view schematically showing a film transport apparatus according to a second embodiment of the present invention.
Fig. 9 is a plan view schematically showing a film transport apparatus according to a third embodiment of the present invention.
Fig. 10 is a side view schematically showing a steering column used in the third embodiment of the present invention when viewed from the extending direction of the steering column.
Fig. 11 is a plan view schematically showing a 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 production apparatus according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments and examples. However, the present invention is not limited to the embodiments and examples described below, and may be modified and practiced as desired without departing from the scope and range of equivalents of the claims.
In the following description, "upstream" and "downstream" mean upstream and downstream in the film transport direction unless otherwise specified.
In the following description, the directions of the elements are "parallel", "perpendicular", and "orthogonal", and means that an error in a range not impairing the effect of the present invention, for example, in a range of ± 5 ° may be included unless otherwise specified.
In the following description, the film transport direction means a direction in which the midpoint in the width direction of the film moves unless otherwise specified.
In the following description, a film means a long film unless otherwise specified. The long film is a film having a length of 5 times or more, preferably 10 times or more, with respect to the width thereof, and more specifically, a film having a length of a degree of being wound into a roll shape for storage or transportation. The upper limit of the length of the long film is arbitrary, but may be 100000 times or less with respect to the width, for example.
[1. first embodiment ]
Fig. 1 is a plan view schematically showing a film transport apparatus 1 according to a first embodiment of the present invention. This plan view shows the film conveying apparatus 1 viewed from above in the direction of gravity.
As shown in fig. 1, a film transport apparatus 1 according to a first embodiment of the present invention is an apparatus for transporting a long film 10, and includes, in order from upstream: a film feeding device 200, a turning lever 100, a dancer 300 as a floating amount adjusting device, and a conveying direction correcting device 400.
[1.1. steering column 100]
FIG. 2 is a schematic view showing the extending direction A of the steering column 100100A side view of the steering rod 100 used in the first embodiment of the present invention is seen (see fig. 1).
As shown in fig. 2, the turn bar 100 has a conveying surface 100S as an outer surface of the turn bar 100, and is a member for continuously conveying the film 10 along the conveying surface 100S. In the steering column 100, the extending direction a of the steering column 100 is normal100Arranged parallel to the horizontal direction.
The steering rod 100 is formed as a hollow body, and a supply pipe (not shown) for supplying a fluid into the hollow body is connected to an end portion 100E in the extending direction thereof. A plurality of openings (not shown) capable of ejecting the supplied fluid are formed in the conveying surface 100S of the steering lever 100. As the fluid, a liquid can be used, but a gas such as air is generally used. The steering rod 100 is provided so as to be able to convey the film 10 in a non-contact state in which the film 10 floats from the conveyance surface 100S by the fluid ejected from the opening.
The conveying surface 100S includes: a curved surface 110S for changing the conveying direction of the film 10; an upper plane 120S continuous with one of the upstream and downstream of the curved surface 110S and facing upward in the direction of gravity; and a lower flat surface 130S continuous with the other of the upstream and downstream curved surfaces 110S and facing downward in the direction of gravity.
The curved surface 110S is a cylindrical curved surface extending in the extending direction of the steering rod 100. The curved surface 110S is cut by a plane perpendicular to the extending direction of the steering rod 100, and has an arc-shaped cross section.
The upper plane 120S is a plane smoothly and continuously formed with respect to the curved surface 110S. The upper plane 120S is provided in parallel with the conveying direction of the film 10 passing through the upper plane 120S, and is also provided generally in parallel with the horizontal direction. In the present embodiment, an upper flat surface 120S is provided upstream of the curved surface 110S.
The lower plane 130S is a plane smoothly and continuously formed with respect to the curved surface 110S. The lower plane 130S is disposed parallel to the conveying direction of the film 10, and is also disposed generally parallel to 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 in the entirety of the conveyance surface 100S. However, in order to increase the ejection pressure of the liquid from the opening, the opening formed in the portion of the transport surface 100S where the film 10 does not pass through is preferably closed in advance. Therefore, in the present embodiment, the explanation will be given taking, as an example, the steering lever 100 in which an opening is formed only in a portion of the conveying surface 100S where the film 10 passes.
The opening of the conveyance surface 100S is formed so that the fluid discharged from the opening can flow through the gap between the conveyance surface 100S and the film 10. Normally, the opening is formed so that the fluid discharged from the opening flows toward the opposite side of the curved surface 110S. Thus, at the upper plane 120S, the fluid resembles arrow A1As shown, the fluid flows from the curved surface 110S to the upper flat surface 120S, passes through the end 120E of the upper flat surface 120S, and is discharged. On the other hand, at the lower plane 130S, the fluid resembles arrow A2As shown, the fluid flows from the curved surface 110S to the lower flat surface 130S, passes through the end 130E of the lower flat surface 130S, and is discharged. The specific shape of the opening can be, for example, the shape described in japanese patent No. 5152477.
[1.2. film supply device 200]
As shown in fig. 1, the film supply device 200 is a device provided upstream of the steering rod 100 and used to supply the film 10 to the steering rod 100. The film supply device 200 is provided so as to be able to feed the film 10 to the steering rod 100 in the direction of conveyance with respect to the extending direction a of the steering rod 100100The film 10 is supplied to the steering rod 100 in an inclined manner. Here, the film 10 is transported in the direction opposite to the extending direction a of the steering rod 100100The inclination indicates the direction of conveyance of the film 10 relative to the direction A of extension of the steering rod 100100Neither parallel nor perpendicular.
Therefore, the film feeding device 200 can cross at an edge side crossing angle θ with the upper plane 120S of the steering lever 100 viewed from above in the direction of gravityiGreater than the other edge side crossing angle thetaiiThe film 10 is supplied to the steering rod 100. Here, an edge-side crossing angle θiAn angle formed by the edge portion 110E on the curved surface 110S side of the steering lever 100 and the one edge portion 11 of the film 10 in the film width direction outside the film 10 when the upper plane 120S of the steering lever 100 is viewed from above in the direction of gravity is shown. Here, the other edge side cross angle θiiAn angle formed by the edge portion 110E on the curved surface 110S side of the steering lever 100 and the other edge portion 12 of the film 10 in the film width direction outside the film 10 when the upper plane 120S of the steering lever 100 is viewed from above in the direction of gravity is shown.
When the upper plane 120S of the steering lever 100 is viewed from above in the direction of gravity, the edge 110E of the steering lever 100 on the curved surface 110S side is generally aligned with the extending direction a of the steering lever 100100Parallel. Therefore, when the film 10 is fed to the steering rod 100, the feeding direction is the same as described aboveFor the direction of extension A of the steering rod 100100At an edge-side crossing angle theta when inclinediCrossing the other edge side by an angle thetaiiThe relationship of (2) is set as described above. Using the edge-side crossing angle thetaiAnd the other side edge side intersection angle thetaiiThe relationship (c) represents the orientation of rotation of the film 10 passing through the steering rod 100. Specifically, an edge-side intersection angle θ is usediAnd the other side edge side intersection angle thetaiiTo indicate whether the orientation of the rotation of the film 10 is to the right or to the left.
In order to supply the film 10 to the steering lever 100 as described above, the film supply device 200 includes the suction roller 210 in the present embodiment. The suction roller 210 is provided so as to be able to supply the film 10 to the steering lever 100 via the steering lever 210 immediately upstream of the steering lever 100.
The suction roller 210 has a circumferential surface 210S in which a plurality of suction holes (not shown) capable of sucking the film 10 are formed. Specifically, the suction roller 210 has a peripheral portion 211 formed by a mesh member, and is provided so as to be capable of sucking the film 10 through suction holes corresponding to meshes of the peripheral portion 211. The suction roller 210 is connected to a driving device (not shown) such as a motor for driving the suction roller 210 to rotate, and is provided so as to be rotatable in the circumferential direction by the driving force of the driving device. The suction roller 210 is provided so as to be able to feed the film 10 in a predetermined direction by rotating while sucking the film 10. Normally, the film 10 is fed in a direction perpendicular to the axial direction of the suction roller 210. Further, by rotating the suction roller 210 while sucking the film 10 as described above, a desired tension can be applied to the film 10 supplied to the steering lever 100.
The circumferential surface 210S of the suction roller 210 is generally formed of a metal such as stainless steel or nickel. Examples of such a suction roll 210 include those described in, for example, japanese patent application laid-open nos. 2010-173843 and 7-127631.
[1.3. dancer roll 300]
The film 10 supplied to the steering rod 100 is conveyed in the extending direction a with respect to the steering rod 100 as described above100In the case of tilting, if notBy taking special measures, there is a possibility that the film 10 does not sufficiently float at the one edge portion 11, and the film 10 and the steering rod 100 are in contact. When contacted in this manner, a flaw may be generated in the film 10. In contrast, in the film transport apparatus 1 according to the present embodiment, the dancer roller 300 serving as a dancing amount adjusting device is provided in order to sufficiently increase the amount of the film 10 that floats at the one edge portion 11 and suppress the occurrence of the scratch.
The adjustment roller 300 is a roller for adjusting the floating amount of the film 10 conveyed on the upper plane 120S of the steering lever 100, and is provided downstream of the steering lever 100 as shown in fig. 1 in the present embodiment. Here, as shown in fig. 2, the floating amount of the film 10 indicates a distance C between the upper plane 120S of the steering rod 100 and the film 10.
Specifically, the dancer 300 is provided in such a manner as to be able to make the amount of floating at one edge portion 11 of the film 10 conveyed on the upper plane 120S of the steering lever 100 larger than the amount of floating at the other edge portion 12 of the film 10 conveyed on the upper plane 120S of the steering lever 100. More specifically, the adjustment roller 300 is provided to be movable and rotatable in the horizontal direction, and is provided to be able to adjust the position and the axial direction as viewed from above in the direction of gravity. And, the dancer 300 is provided in the following manner: by adjusting the conveying direction of the film 10 sent out from the steering lever 100, one edge portion 11 of the film 10 conveyed on the upper plane 120S of the steering lever 100 is made looser than the other edge portion 12 of the film 10 conveyed on the upper plane 120 of the steering lever 100.
In the present embodiment, the regulating roller 300 has a circumferential surface 300S in which a plurality of suction holes (not shown) capable of sucking the film 10 are formed. Further, the resist roller 300 is connected to a driving device (not shown) such as a motor for driving the resist roller 300 to rotate, and is provided so as to be rotatable in the circumferential direction by a driving force of the driving device. Further, since the dancer 300 collects the film 10 by rotating while sucking the film 10, the dancer is provided so that the feed direction of the film 10 fed out from the steering rod 100 can be adjusted according to the position and the axial direction of the dancer 300.
Hereinafter, the adjustment using the dancer roller 300 in the conveyance direction of the film 10 fed out from the steering rod 100 will be described in comparison with a conventional film conveyance device without the dancer roller 300 as the floating amount adjustment device.
Fig. 3 is a plan view schematically showing a film transport apparatus 9 as an example of a conventional film transport apparatus without the dancer 300. Fig. 4 is a plan view schematically showing the film transport direction in the film transport device 9. In these plan views, the film transport device 9 is shown as viewed from above in the direction of gravity. In FIG. 4, arrow A is used41The direction of conveyance of the film 10 supplied to the steering lever 100 is shown by an arrow A42The conveying direction of the film 10 fed out from the steering rod 100 is shown. In fig. 4, the direction of transport a of the film 10 at the lever 100 is turned to facilitate understanding41In the conveying direction A42Is shown as an angular change, but actually, since the turn lever 100 has the curved surface 110S, the film 10 at the turn lever 100 is transferred from the conveying direction a41In the conveying direction A42The variation of (c) is typically an arc-like variation.
As shown in fig. 3, in the conventional film feeding apparatus 9 without the dancer 300, the film 10 is fed from the suction roller 210 of the film feeding apparatus 200 to the steering rod 100. When viewed from above in the direction of gravity, as shown in fig. 4, the film 10 is generally conveyed in a conveying direction a perpendicular to the axial direction of the suction roller 21041And (7) sending out.
As shown in fig. 3, the film 10 supplied to the turning bar 100 is fed out from the turning bar 100 after being conveyed along the conveying surface 100S of the turning bar 100. By being conveyed along the conveying surface 100S of the steering lever 100 in this manner, the steering lever 100 is conveyed in the conveying direction a as shown in fig. 441In the conveying direction A42And (4) changing. At this time, if viewed from above in the direction of gravity, the entry angle of the film 10 into the steering rod 100
Figure BDA0001906133170000091
Angle of feed-out of film 10 from steering rod 100
Figure BDA0001906133170000092
Typically of the same size. Herein, go intoEntrance angle
Figure BDA0001906133170000093
Shows a conveying direction A of the film 10 supplied to the steering lever 10041Relative to the extending direction A of the steering rod 100100Angle formed by perpendicular plane X
Figure BDA0001906133170000094
Furthermore, the delivery angle
Figure BDA0001906133170000095
Shows a conveying direction A of the film 10 fed out from the steering lever 10042Relative to the extending direction A of the steering rod 100100Angle formed by perpendicular plane X
Figure BDA0001906133170000096
Therefore, in the conventional film feeding device 9 without the dancer 300, if "2 × Φ" is used to indicate the feeding direction a of the film 10 fed to the steering lever 100 when viewed from above in the direction of gravity41In the conveying direction A of the film 10 fed out from the steering rod 10042The size of the angle formed is represented by "phi" indicating the delivery angle
Figure BDA0001906133170000097
The size of (2).
In contrast, in the film transport apparatus 1 having the adjustment roller 300, as shown in fig. 1, the adjustment roller 300 adjusts the transport direction of the film 10 sent out from the steering lever 100. Fig. 5 shows a change in the transport direction of the film 10 at this time.
Fig. 5 is a plan view schematically showing a film transport direction in the film transport apparatus 1 according to the first embodiment of the present invention. In this plan view, the film conveying apparatus 1 is shown as viewed from above in the direction of gravity. In FIG. 5, arrow A is used51The direction of conveyance of the film 10 supplied to the steering lever 100 is shown by an arrow A52The conveying direction of the film 10 fed out from the steering rod 100 is shown. Further, in fig. 5, a conventional film transport device without the dancer roller 300 is shown by an arrow with a two-dot chain lineConveying direction A of film 10 in set 9, which is fed out from steering rod 10042. In fig. 5, for ease of understanding, the direction of transport a of the film 10 at the turning bar 100 is turned to51In the conveying direction A52Is shown as an angular change, but actually, since the turn lever 100 has the curved surface 110S, the film 10 at the turn lever 100 is transferred from the conveying direction a51In the conveying direction A52The variation of (c) is typically an arc-like variation.
As shown in fig. 5, the feed direction a of the film 10 fed out from the steering lever 100 is adjusted by the adjustment roller 30052Adjusted to its delivery angle
Figure BDA0001906133170000098
Is greater than the delivery angle
Figure BDA0001906133170000099
The size of (c) is small. Since the film 10 is bound by the suction roller 210 at the upstream, if the regulation roller 300 is applied to the conveying direction a of the film 10 as described above52Adjustment is performed, and as shown in fig. 1, the tension at one edge portion 11 of the film 10 conveyed on the upper plane 120S of the steering lever 100 is lowered, and the tension at the other edge portion 12 of the film 10 conveyed on the upper plane 120S of the steering lever 100 is raised. Thereby, one edge portion 11 of the film 10 conveyed on the upper plane 120S of the steering lever 100 is looser than the other edge portion 12 of the film 10 conveyed on the upper plane 120S of the steering lever 100.
Film 10 feed angle in conventional film transport apparatus 9 without dancer 300
Figure BDA0001906133170000101
Delivery angle with film 10 in film transport device 1 having regulation roller 300
Figure BDA0001906133170000102
Angle difference of
Figure BDA0001906133170000103
(see fig. 5) can be arbitrarily adjusted within a range in which damage to the film 10 can be suppressed. As a specific range of the amount of the surfactant,the difference in angle
Figure BDA0001906133170000104
For example, the angle may be set in a range of more than 0 ° and 5 ° or less.
As described above, the one edge portion 11 of the film 10 conveyed on the upper plane 120S of the steering rod 100 is loosened and can be easily lifted by the force from the fluid ejected from the opening formed on the conveying surface 100S of the steering rod 100, so that the amount of lifting at the one edge portion 11 can be increased. The floating amount of the one edge portion 11 can be arbitrarily adjusted within a range in which damage of the film can be suppressed. In order to effectively suppress the damage, it is preferable to adjust the floating amount of the one edge portion 11 to, for example, about 2 times as large as the floating amount of the other edge portion 12.
The film transport apparatus 1 may have a mechanism for performing tension control of the film 10, and the dancer 300 may be used as the mechanism for the tension control. For example, when the film transport apparatus 1 includes a tension pick-up roller (tension pick-up roller) for measuring the tension of the film 10 on the transport path from the suction roller 210 to the adjustment roller 300, and a drive roller (not shown) for transporting and driving the film 10 based on the tension measured by the tension pick-up roller, the drive control of the drive roller enables the tension control of the film 10 on the transport path from the suction roller 210 to the adjustment roller 300. In this case, the dancer roller 300 can be used as the driving roller. Further, if, in the tension control, feedback control of the drive roller is performed using the tension measured by the tension pickup roller, more accurate tension control can be performed. In the present embodiment, an example in which the tension of the film 10 is controlled by the dancer 300 is shown and described.
[1.4 ] conveying direction correction device 400]
If the transport direction of the film 10 is adjusted by the adjustment roller 300 as described above, there is a possibility that the transport direction of the film 10 deviates from a desired direction downstream of the adjustment roller 300 as shown in fig. 1. In order to correct such a deviation in the conveying direction, the film conveying apparatus 1 preferably includes a conveying direction correction device 400. The conveying direction correcting device 400 is a device for changing the conveying direction of the film 10 sent out from the regulating roller 300, and for example, a device including a roller may be used.
Fig. 6 is a perspective view schematically showing a conveyance direction correction device 400 used in the first embodiment of the present invention.
As shown in fig. 6, the conveying direction correcting device 400 includes guide rollers 410, 420, 430, and 440 in this order from upstream.
The guide rollers 420 and 430 are provided at the rotating base 450. Further, as shown by arrow A in FIG. 661As shown, the rotating base 450 is provided to be able to swing in the horizontal direction. The rotation is an arc-shaped rotation about a rotation axis passing through the axial center portion of the guide roller 420. Here, the rotation shaft does not mean a specific member, but means a virtual shaft shown for explaining the center of rotation of the rotation base 450. By the rotation of the rotating base 450, the guide rollers 420 and 430 are rotated in conjunction, and the angle of the rotating shafts of the guide rollers 420 and 430 is adjusted. Further, by adjusting the angle of the rotating shaft of the guide rollers 420 and 430, the frictional force between the film 10 and the guide rollers 420 and 430 is distributed in the width direction of the film 10, and the conveying direction of the film 10 is corrected. Therefore, the conveying direction correcting device 400 is provided so that the conveying direction of the film 10 can be corrected to a desired direction by adjusting the rotation angle of the rotating base 450.
The conveying direction correction device 400 may include an appropriate sensor (not shown) capable of detecting the conveying direction of the film 10, and a controller (not shown) capable of controlling the conveying direction correction device 400 based on the upper side of the conveying direction detected by the sensor. As such a conveyance direction correction device 400, for example, a center position control device (CPC device) manufactured by Nireco corporation, an edge position control device (EPC device), or the like can be used.
[1.5 ] method for transporting film 10 using film transport apparatus 1]
The film transport apparatus 1 according to the first embodiment of the present invention has the above-described configuration. When the film 10 is conveyed by using the film conveying apparatus 1, the film 10 is supplied to the film supply apparatus 200 as shown in fig. 1. Then, the supplied film 10 is conveyed to the steering rod 100 with a predetermined tension applied thereto by the dancer 300.
The film 10 conveyed toward the steering rod 100 is conveyed on the conveying surface 100S of the steering rod 100 in the order of the upper flat surface 120S, the curved surface 110S, and the lower flat surface 130S. Specifically, the film 10 is conveyed in the following manner: is conveyed on the upper plane 120S of the steering rod 100, and changes the conveying direction by being conveyed on the curved surface 110S, and then passes through the lower plane 130S. At this time, since the fluid is discharged from the opening formed in the transport surface 100S of the steering rod 100, the film 10 floats from the transport surface 100S and does not contact the transport surface 100S.
Fig. 7 is a plan view schematically showing a steering rod 100 used in the first embodiment of the present invention. In this top view, the steering column 100 is shown viewed from above in the direction of gravity. In fig. 7, a boundary between the curved surface 110S of the conveying surface 100S of the steering rod 100 and the upper flat surface 120S is indicated by a chain line.
As shown in fig. 7, the film 10 conveyed so as to pass through the upper plane 120S is conveyed in a state of being floated by the fluid ejected from the opening formed in the conveyance surface 100S of the steering rod 100. On the upper flat surface 120S, the fluid flows from the curved surface 110S to the upper flat surface 120S (see arrow a in fig. 2)1)。
At this time, in the other edge portion 12 of the film 10, as indicated by an arrow a12The fluid is shown flowing steadily between the membrane 10 and the upper plane 120S. Therefore, the other edge portion 12 of the membrane 10 can obtain sufficient buoyancy.
On the other hand, in one edge portion 11 of the film 10, as indicated by an arrow a11As shown, the fluid is easily discharged to the outside between the membrane 10 and the upper plane 120S. Thereby, it is difficult to obtain sufficient buoyancy at the one edge portion 11 of the film 10. Therefore, in the related art, at one edge portion 11 of the film 10, the floating amount of the film 10 is easily reduced due to the self-weight and tension of the film 10, with the result that the film 10 is damaged by contact with the upper plane 120S of the steering rod 100. Further, if the film 10 is in contact with the upper plane 120S of the steering lever 100, the conveying position of the film 10 is deviated or the film 10 is bent due to the impact of the contact.
In contrast, in the present embodiment, the adjustment of the conveying direction of the film 10 by the adjustment roller 300 makes one edge portion 11 of the film 10 conveyed on the upper plane 120S looser than the other edge portion 12 of the film 10 conveyed on the upper plane 120S. Therefore, at the one edge portion 11 of the film 10, the action of the tension becomes small. Thus, even if the buoyancy applied by the fluid discharged from the opening formed in the transport surface 100S of the steering rod 100 is small, the one edge portion 11 of the film 10 can be greatly lifted. 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. Since a large floating amount can be obtained in this manner, when the film 10 is conveyed on the upper plane 120S, the one edge portion 11 of the film 10 is less likely to contact the upper plane 120S, and damage is suppressed. Further, normally, even in the case where the floating amount at the one edge portion 11 of the film 10 is made large as described above, the floating amount at the other edge portion 12 of the film 10 can be secured. For example, by appropriately adjusting the pressure of the fluid ejected from the opening of the steering rod 100 and the tension of the membrane 10, the floating amount at the other edge portion 12 of the membrane 10 can be ensured. Therefore, the floating amount of the both edge portions 11 and 12 of the film 10 can be sufficiently secured, and thus damage can be effectively suppressed. Further, since the contact of the film 10 with the steering lever 100 can be suppressed, the deviation of the conveying position of the film 10 and the bending of the film 10 due to the contact can be generally suppressed.
After the film is conveyed on the conveying surface 100S of the steering lever 100, the film 10 is fed from the steering lever 100 to the dancer 300 as shown in fig. 1. The film 10 conveyed to the conditioning roller 300 is recovered by the conditioning roller 300. By being collected by the adjustment roller 300 in this manner, the direction of conveyance of the film 10 fed out from the steering rod 100 is adjusted.
Then, the film 10 collected by the registration roller 300 is sent to the conveying direction correcting device 400. Then, the conveying direction is changed by the conveying direction correcting device 400 so that the conveying direction is a desired direction, and the film is sent out from the film conveying device 1. For example, the present invention is provided by adding the adjustment roller 300 and the conveying direction correction device 400 to an existing apparatusIn the case of the film transport apparatus 1 according to the embodiment, the film 10 is usually transported from the film transport apparatus 1 to the transport direction a of the film 10 before the adjustment roller 300 and the transport direction correction apparatus 400 are added42(see fig. 4 and 5) in the same direction.
As described above, according to the film transport apparatus 1 according to the first embodiment of the present invention, since the contact between the upper plane 120S of the steering lever 100 and the film 10 can be suppressed, the transport direction of the film 10 can be changed while suppressing the occurrence of the flaw. Further, according to the film transport apparatus 1 described above, it is possible to generally suppress the deviation of the transport position of the film 10 and the bending of the film 10.
Even when the conveying direction of the film 10 fed out from the steering lever 100 is adjusted by the adjustment roller 300 so that the conveying direction of the film 10 is deviated from a desired direction, the above-described film conveying apparatus 1 can correct the deviation by the conveying direction correction apparatus 400. Therefore, since the conveying direction of the film 10 fed out from the film conveying apparatus 1 is easily set, it is particularly easy to change the conveying direction of the film 10 to a desired direction.
[2. second embodiment ]
The first embodiment described above shows an embodiment in which the floating amount of the film 10 conveyed on the upper plane 120S of the steering rod 100 is adjusted using the adjustment roller 300. However, the adjustment of the floating amount of the film 10 may not necessarily be performed by the adjustment roller 300, and may be performed by using, for example, the steering lever 100 itself. In this case, the steering rod 100 functions as a float amount adjusting device. This embodiment will be described below.
Fig. 8 is a plan view schematically showing a film transport apparatus 2 according to a second embodiment of the present invention. In this plan view, the film transport device 2 is shown 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 is provided in the same manner as the film transport apparatus 1 according to the first embodiment, except that the adjustment roller 300 is not provided, and the steering lever 100 itself functions as a floating amount adjustment device for adjusting the floating amount of the film 10 transported on the upper plane 120S of the steering lever 100.
In the present embodiment, the steering rod 100 is provided so as to be movable and rotatable in the horizontal direction, and so as to be adjustable in position as viewed from above in the direction of gravity and in the extending direction a100The mode of (2). The position and the extending direction a of the steering rod 100100So that the conveying direction of the film 10 fed out from the steering lever 100 can be set to be the same as the conveying direction a of the film 10 in the first embodiment52(see fig. 5) in the same manner. Specifically, in the present embodiment, an edge-side intersection angle θ is set such that the upper plane 120S of the steering column 100 is viewed from above in the direction of gravityiThe position and the extending direction a of the steering rod 100 are adjusted in a manner smaller than that of the first embodiment100。
The film transport apparatus 2 according to the second embodiment can transport a long film 10 in the same manner as the film transport apparatus 1 according to the first embodiment. At this time, since the contact between the upper plane 120S of the steering lever 100 and the film 10 can be suppressed, the transport direction of the film 10 can be changed while suppressing the occurrence of scratches. Further, according to the film transport apparatus 2 described above, the same advantages as those of the film transport apparatus 1 according to the first embodiment can be obtained in general.
Further, the film transport apparatus 2 according to the second embodiment may be provided with a drive roller (not shown) for controlling the tension of the film 10. Such a drive roller is usually provided between the steering lever 100 and the conveying direction correcting device 400.
[3] third embodiment ]
In the first and second embodiments described above, the film 10 is conveyed in the order of the upper flat surface 120S, the curved surface 110S, and the lower flat surface 130S when the film 10 is conveyed on the conveying surface 100S of the steering lever 100. However, the direction of conveyance 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. This embodiment will be described below.
Fig. 9 is a plan view schematically showing a film transport apparatus 3 according to a third embodiment of the present invention. In this plan view, the film transport device 3 is shown viewed from above in the direction of gravity.
As shown in fig. 9, the film transport apparatus 3 according to the third embodiment of the present invention includes, in order from the upstream side, a film supply device 600, a steering lever 500, a dancer roller 700 as a levitation amount adjusting device, and a transport direction correcting device 800.
[3.1. steering column 500]
FIG. 10 is a schematic view showing the extending direction A of the sub-steering lever 500500A side view of the steering rod 500 used in the third embodiment of the present invention is seen (see fig. 9).
As shown in fig. 10, the turning bar 500 is provided in the same manner as the turning bar 100 used in the first embodiment except that the turning bar 500 is provided so that the film 10 conveyed on the conveyance surface 500S of the turning bar 500 is conveyed in the order of the lower flat surface 530S, the curved surface 510S, and the upper flat surface 520S.
Therefore, at the conveying surface 500S of the steering lever 500, the upper flat surface 520S is continuously formed downstream of the curved surface 510S, and further, the lower flat surface 530S is continuously formed upstream of the curved surface 510S. Further, an opening (not shown) capable of discharging a fluid supplied from a supply pipe (not shown) connected to the end portion 500E of the steering rod 500 is formed in the conveyance surface 500S. And, the steering lever 500 is provided in the following manner: the fluid ejected from the opening flows in the gap between the transport surface 500S and the film 10, as indicated by the arrow a1And A2As shown, the fluid flows from the curved surface 510S to the upper flat surface 520S or the lower flat surface 530S, and is discharged through an end 520E of the upper flat surface 520S or an end 530E of the lower flat surface 530S.
[3.2. film supply device 600]
As shown in fig. 9, the film supply apparatus 600 is provided in the same manner as the film supply apparatus 200 used in the first embodiment, except that the film 10 is not supplied to the upper plane 520S of the steering lever 500 but is supplied to the lower plane 530S.
Therefore, the film supply device 600 includes a suction roller 610 having a plurality of suction holes (not shown) formed in a circumferential surface 610S thereof, the suction roller 610 having a circumferential portion 611 formed of a mesh-like member, and being capable of sucking the film 10. The film supply device 600 is provided so as to be able to feed the film 10 supplied to the steering lever 500 while applying a desired tension to the film 10 by rotating the film 10 while sucking the film by the suction roller 610.
Further, the film supply device 600 is provided so as to be able to feed the film 10 to the steering rod 500 in the conveying direction with respect to the extending direction a of the steering rod 500500The film 10 is supplied to the turning lever 500 in an inclined manner. Therefore, the film feeding device 600 can have an edge-side intersection angle θ when the upper plane 520S of the turn lever 500 is viewed from above in the direction of gravityiGreater than the other edge side crossing angle thetaiiIn the above-described manner, the film 10 is supplied to the steering rod 500. Here, an edge-side crossing angle θiAn angle formed by the edge portion 510E on the curved surface 510S side of the steering lever 500 and the one edge portion 11 of the film 10 outside the film 10 when the upper plane 520S of the steering lever 500 is viewed from above in the direction of gravity is shown. Further, the other edge side crossing angle θiiThis shows an angle formed by the edge portion 510E on the curved surface 510S side of the steering lever 500 and the other edge portion 12 of the film 10 outside the film 10 when the upper plane 520S of the steering lever 500 is viewed from above in the direction of gravity.
[3.3. dancer 700]
As shown in fig. 9, the adjustment roller 700 is provided in the same manner as the first embodiment, except that the direction of the film 10 in the transport direction adjusted by the adjustment roller 700 is different from that of the first embodiment. The direction of the film 10 in the transport direction is the direction of the film 10 fed out from the turning lever 500 in the transport direction. In order to adjust the floating amount of the film 10 conveyed on the upper plane 520S of the steering lever 500, the orientation of the conveying direction of the film 10 is adjusted by the adjustment roller 700.
The adjustment using the adjustment roller 700 in the transport direction of the film 10 fed out from the turning lever 500 will be described below.
Fig. 11 is a plan view schematically showing a film transport direction in the film transport apparatus 3 according to the third embodiment of the present invention. In this plan view, the film transport device 3 is shown viewed from above in the direction of gravity. In addition, in FIG. 11, arrow A is used111Indicating supply to the steering rod 500The direction of feed of the film 10, indicated by arrow A112The conveying direction of the film 10 fed out from the steering rod 500 is shown. Further, in fig. 11, a conveying direction a of the film 10 fed out from the turning lever 500 in the conventional film conveying apparatus without the dancer 700 is shown by an arrow of a two-dot chain line113. In fig. 11, the extending direction a of the steering rod 500 is indicated by the symbol X500A vertical plane. In fig. 11, the direction of transport a of the film 10 at the turning lever 500 is changed to facilitate understanding111In the conveying direction A112Is shown as an angular change, but actually, since the turn lever 500 has the curved surface 510S, the film 10 at the turn lever 500 is transferred from the conveying direction a111In the conveying direction A112The variation of (c) is typically an arc-like variation.
As described in the first embodiment, in the conventional film transport apparatus without the dancer 700, the entry angle at which the film 10 enters the turn lever 500 and the exit angle at which the film 10 is discharged from the turn lever 500 are generally the same size when viewed from above in the direction of gravity (see the entry angle shown in fig. 4)
Figure BDA0001906133170000171
And delivery angle
Figure BDA0001906133170000172
). Therefore, in the conventional film feeding device without the dancer 700, if "2 × Φ" indicates the feeding direction a of the film 10 supplied to the steering lever 500 when viewed from above in the direction of gravity111In the conveying direction A of the film 10 fed out from the steering rod 500113The size of the angle is represented by "Φ".
In contrast, as shown in fig. 11, the dancer 700 according to this embodiment deflects the film 10 fed out from the steering rod 500 in the feeding direction a112Adjusted to its delivery angle
Figure BDA0001906133170000173
Is larger than the feed angle "Φ" in the conventional film transport apparatus without the dancer roller 700. Thereby, as shown in FIG. 9On the film 10 conveyed on the upper plane 520S of the steering lever 500, the tension at one edge portion 11 is lowered, and the tension at the other edge portion 12 is raised. Therefore, as in the first embodiment, the one edge portion 11 of the film 10 conveyed on the upper plane 520S of the steering lever 500 is looser than the other edge portion 12 of the film 10 conveyed on the upper plane 520S. Thereby, the floating amount at one edge portion 11 of the film 10 conveyed on the upper plane 520S can be adjusted in a larger manner than the floating amount at the other edge portion 12 of the film 10 conveyed on the upper plane 520S.
The feed angle of the film 10 in the conventional film transport apparatus without the dancer 700 and the feed angle of the film 10 in the film transport apparatus 3 with the dancer 700
Figure BDA0001906133170000174
Angle difference of
Figure BDA0001906133170000175
(see fig. 11) can be arbitrarily adjusted within a range in which damage to the membrane 10 can be suppressed. As a specific range, the angle difference
Figure BDA0001906133170000176
For example, the angle may be set in a range of more than 0 ° and 5 ° or less.
[3.4 ] conveying direction correcting device 800
As shown in fig. 9, the conveying direction correction device 800 is provided to correct the deviation of the conveying direction of the film 10 fed from the registration roller 700 from the desired direction, as in the first embodiment.
[3.5 ] method for transporting film 10 using film transport apparatus 3]
The film transport apparatus 3 according to the third embodiment of the present invention has the above-described configuration. When the film 10 is conveyed by using the film conveying apparatus 3, the film 10 is supplied to the film supply apparatus 600 as shown in fig. 9. The film 10 is fed to the steering rod 500 in a state where a predetermined tension is applied to the adjustment roller 700, as in the first embodiment.
The film 10 conveyed to the steering lever 500 is conveyed on the conveying surface 500S of the steering lever 500 in the order of the lower flat surface 530S, the curved surface 510S, and the upper flat surface 520S. At this time, the conveying direction of the film 10 is adjusted by the adjustment roller 700, so that one edge portion 11 of the film 10 conveyed on the upper plane 520S is looser than the other edge portion 12 of the film 10 conveyed on the upper plane 520S. Therefore, as in the first embodiment, the floating amount at one edge portion 11 of the film 10 conveyed on the upper plane 520S is larger than the floating amount at the other edge portion 12 of the film 10 conveyed on the upper plane 520S. Since a large floating amount can be obtained in this manner, when the film 10 is conveyed on the upper plane 520S, the one edge 11 of the film 10 is less likely to contact the upper plane 520S, and damage is suppressed.
Thereafter, the film 10 is sent out from the turning lever 500 to the adjustment roller 700, and sent to the conveying direction correcting device 800 via the adjustment roller 700. Then, as in the first embodiment, the conveying direction is corrected by the conveying direction correcting device 800 so that the conveying direction is a desired direction, and the film is sent out from the film conveying device 3.
As described above, according to the film transport apparatus 3 according to the third embodiment of the present invention, the transport direction of the film 10 can be changed while suppressing the occurrence of the flaw, as in the film transport apparatus 1 according to the first embodiment. Further, according to the film transport apparatus 3 according to the third embodiment of the present invention, the same advantages as those of the film transport apparatus 1 according to the first embodiment can be obtained.
[4. fourth embodiment ]
Generally, the film transfer using the film transfer apparatus is performed in a film production method for producing a long film. Therefore, the film production method of the present invention includes a step of conveying a long film by using the film conveying apparatus.
Examples of the film production method described above include a film production method including a step of molding a film material to obtain a long film and a step of conveying the obtained film by using a film conveying device. In such a film production method, the produced film can be conveyed and recovered while suppressing the occurrence of scratches.
In addition, as the film transfer method as described above, for example, there is a film production method including a step of transferring a long film by using a film transfer apparatus and a step of performing an appropriate processing treatment on the transferred film. In such a film production method, a film prepared for supply to a processing apparatus can be conveyed to the processing apparatus while suppressing the occurrence of scratches, and can be appropriately processed. Hereinafter, an embodiment of the film production method will be described.
Fig. 12 is a plan view schematically showing a film production apparatus 4 according to a fourth embodiment of the present invention. In the plan view, the film manufacturing apparatus 4 is shown as viewed from above in the direction of gravity.
As shown in fig. 12, a film production apparatus 4 according to a fourth embodiment of the present invention includes a film transport apparatus 1 provided similarly to the first embodiment, and a stretching apparatus 900 as a processing apparatus provided downstream of the film transport apparatus 1.
The stretching device 900 is a device for performing a stretching process, which is a processing process, on the film 10 supplied from the conveying direction correcting device 400 of the film conveying device 1. An example of such a stretching apparatus 900 is a tenter apparatus. The tenter device has clips capable of gripping both ends of the film 10 in the width direction, and is a device capable of performing stretching processing of the film 10 by pulling the film 10 with the clips.
In the film production method using the above-described film production apparatus 4, the film 10 is subjected to the stretching treatment while conveying the film 10 in the order of the film conveying apparatus 1 and the stretching apparatus 900. Thus, the film manufacturing method includes a step of conveying the film 10 by using the film conveying apparatus 1, and a step of performing stretching processing on the conveyed film 10 by using the stretching apparatus 900. In this case, since the film 10 can be conveyed by the film conveying device 1 and the conveying direction of the film 10 can be changed to a desired direction, the film manufacturing method can be performed even in a factory where there is a limit to where manufacturing facilities can be installed. Further, since the film transport apparatus 1 is used, the transport direction of the film 10 can be changed while suppressing the occurrence of scratches, and the same advantages as those of the first embodiment can be obtained.
The film production apparatus 4 as described above can be realized by providing the dancer 300 and the conveying direction correction apparatus 400 as the floating amount adjustment apparatus in an existing apparatus having, for example, the steering rod 100, the film supply apparatus 200, and the stretching apparatus 900. At this time, since the conveying direction correcting device 400 is present, the conveying direction of the film 10 fed out from the film conveying device 1 can be unchanged from the existing apparatus. This eliminates the need for position adjustment by an existing device such as the stretching device 900, and thus facilitates application to existing equipment. Further, since the variation of the transport position of the film 10 can be suppressed by the transport direction correction device 400, when the tenter device is used as the stretching device 900, the film can be stably held by the left and right clips.
[5. modification ]
While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and may be further modified and implemented.
For example, in an 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 lever 500 as in the third embodiment, the turn lever 500 may be used as the floating amount adjusting device without using the adjusting roller 700, as in the second embodiment. For example, when the upper plane 520S of the steering lever 500 is viewed from above in the direction of gravity, the edge-side crossing angle θiThe position and the extending direction a of the steering rod 500 are adjusted in a manner smaller than that of the third embodiment500Accordingly, the floating amount of the film 10 at the one edge portion 11 can be sufficiently increased to suppress the occurrence of the flaw.
In the above-described embodiment, for example, a device including a device other than the suction roller may be used as the film supply device. The specific configuration of the film feeding device is arbitrary, but a configuration capable of reducing the tension of the film 10 at the upstream and downstream of the film feeding device is preferable. For example, a film supply device having a nip roller (nip roller) capable of sandwiching the film 10 and reducing the tension thereof may be used.
Further, for example, in the fourth embodiment, the processing treatment may be a treatment other than the stretching treatment. Specific examples of the processing treatment include a bonding treatment, a dicing treatment, a coating treatment, and a winding treatment.
[6. film ]
For the conveyance by the film conveying apparatus described above, any film may be used. Among them, since the effect of effectively suppressing the damage can be effectively utilized, it is preferable to use a surface treatment film such as a coating film or a printed film in which the damage has a large influence on the film quality; resin films and the like are easily damaged.
Since damage can be effectively suppressed as described above, an optical film having high transparency is particularly preferable as the film. The total light transmittance of the optical mode is preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more. The total light transmittance can be measured in the wavelength range of 400nm to 700nm using an ultraviolet-visible spectrophotometer. The haze value 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 value is an average value obtained by measuring 5 positions using a haze meter NDH-300A manufactured by Nippon Denshoku industries Co., Ltd according to JIS K7361-1997.
The thickness of the film may be arbitrarily set according to the use of the film, and is 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, and particularly preferably 100 μm or less.
Description of the reference numerals
1,2,9: a film conveying device;
10: a film;
11: one edge portion of the film;
12: the other edge portion of the film;
100. 500: a steering lever;
100S, 500S: a conveying surface of the steering rod;
100E, 500E: an end portion in an extending direction of the steering rod;
110S, 510S: a curved surface of the steering rod;
110E, 510E: an edge portion on the curved surface side of the steering rod when the upper plane is viewed from above in the direction of gravity;
120S, 520S: an upper plane of the steering rod;
120E, 520E: an end of the upper plane;
130S, 530S: a lower plane of the steering rod;
130E, 530E: an end of the lower plane;
200. 600: a film supply device;
210. 610: a suction roll;
211. 611: the periphery of the suction roller;
210S, 610S: a circumferential surface of the suction roll;
300. 700: a regulating roller;
300S: the circumferential surface of the regulating roller;
400. 800: a conveying direction correcting device;
410. 420, 430 and 440: a guide roller;
900: and a stretching device.

Claims (3)

1. A film conveyance device for conveying an elongated film, comprising:
a steering rod having a conveying surface in which a plurality of openings capable of ejecting a fluid are formed, the film being continuously conveyed in a state in which the film floats from the conveying surface by the fluid ejected from the openings, the conveying surface including: a curved surface; an upper plane which is continuous with the upstream or downstream side of the curved surface and faces upward in the direction of gravity; a lower plane which is continuous with the other of the upstream and downstream of the curved surface and faces downward in the direction of gravity;
a film supply device that is provided upstream of the steering rod and supplies the film to the steering rod such that an angle formed by an edge portion of the steering rod on the curved surface side and one edge portion of the film outside the film is larger than an angle formed by the edge portion of the steering rod on the curved surface side and the other edge portion of the film outside the film when the upper plane is viewed from above in a direction of gravity; and
an adjustment roller provided downstream of the steering lever, the adjustment roller loosening the one edge portion of the film conveyed on the upper plane of the steering lever more than the other edge portion of the film conveyed on the upper plane of the steering lever by adjusting a conveying direction of the film sent out from the steering lever,
the amount of floating at the one edge portion of the film conveyed on the upper plane of the steering rod is larger than the amount of floating at the other edge portion of the film conveyed on the upper plane of the steering rod.
2. The film conveying apparatus according to claim 1,
the film feeding device includes a feeding direction correcting device for changing the feeding direction of the film fed from the dancer roll.
3. A film production method comprising a step of conveying a long strip of film using the film conveying apparatus according to claim 1 or 2.
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