JP5360937B2 - Optical film transport method and transport apparatus - Google Patents

Abstract

The optical film conveyance method comprises an intermittent conveyance process that intermittently conveys an optical film by means of an intermittent conveyance unit (3A) and a continuous conveyance process that continuously conveys the optical film, conveyed from the intermittent conveyance unit (3A), with multiple conveyance units. The method controls the conveyance so that: when transferring the optical film from the intermittent conveyance unit (3A) to the conveyance units, a first conveyance speed, which is the conveyance speed of the optical film conveyed by the intermittent conveyance unit (3A) toward the conveyance units, approaches a second conveyance speed, which is the conveyance speed at which the optical film is conveyed with the conveyance units; and when transferring the optical film from upstream conveyance units to the downstream conveyance unit among the multiple conveyance units, a third conveyance speed, which is the conveyance speed at which the optical film is conveyed from the upstream conveyance units toward the downstream conveyance unit, approaches a fourth conveyance speed, which is the conveyance speed at which the optical film is conveyed on the downstream conveyance unit.

Description

  The present invention relates to an optical film transport method and transport device.

  Conventionally, optical films such as polarizing films and retardation films to be attached to substrates such as liquid crystal panels are known. As a method for transporting such an optical film, a method has been proposed in which a strip-shaped optical film is cut into sheets of a predetermined length and transported.

  For example, in Patent Document 1, the sheet-shaped optical film is cut intermittently from the cutting unit to the downstream side of the cutting unit by cutting the sheet-shaped optical film into a predetermined length while feeding the belt-shaped optical film. Is transported by the continuous transport section.

International Publication No. 2010/021026 Pamphlet

  In the method for transporting an optical film as described above, there are two delivery locations for the optical film: a cutting portion to an intermittent transport portion, and an intermittent transport portion to a continuous transport portion. Therefore, if there is a large difference in the conveyance speed between the cutting part and the intermittent conveyance part or between the intermittent conveyance part and the continuous conveyance part, the optical film is rubbed when the optical film is delivered, and the quality of the optical film May be reduced.

  The present invention has been made in view of such circumstances, and an optical film transport method capable of avoiding rubbing of the optical film in the process of transporting the optical film and suppressing deterioration of the quality of the optical film, and An object is to provide a transport device.

In order to achieve the above object, the present invention employs the following means.
(1) That is, the transport method of the optical film according to the first aspect of the present invention is a transport method of the optical film for transporting a single-wafer optical film, and the belt-shaped optical film is cut at a predetermined length at the cutting portion. A cutting step of cutting into single sheets, an intermittent transport step of intermittently transporting the optical film of the single sheet obtained in the cutting step in an intermittent transport portion, and the single wafer transported from the intermittent transport portion A continuous conveying step of continuously conveying the optical film without stopping at a plurality of conveying units downstream of the intermittent conveying unit from the intermittent conveying unit to the conveying unit. A first conveyance speed that is a conveyance speed of the optical film of the single sheet conveyed toward the conveyance unit in the intermittent conveyance unit and the single sheet conveyed in the conveyance unit The second transport speed is variably controlled so as to approach the second transport speed, which is the transport speed of the optical film, and the sheet is transferred from the upstream transport section to the downstream transport section among the plurality of transport sections. When delivering the leaf optical film, a third transport speed, which is the transport speed of the single-wafer optical film transported from the upstream transport section toward the downstream transport section, and on the downstream transport section The third transport speed or the fourth transport speed is variably controlled so as to approach the fourth transport speed, which is the transport speed of the single-sheet optical film transported in step S2.

  (2) In the method for transporting an optical film according to (1), when the single-layer optical film is transferred from the intermittent transport unit to the transport unit, At the end time, the single-sheet optical film may be sent out such that a rear end of the optical film is separated from the intermittent conveyance unit.

  (3) In the method for transporting an optical film according to the above (1) or (2), when the single-wafer optical film is transferred from the intermittent transport unit to the transport unit, the second transport speed of the second transport speed is set. The ratio with respect to the first conveyance speed may be 0.8 or more and 1.2 or less.

  (4) In the method of transporting an optical film according to any one of (1) to (3) above, when delivering the single-sheet optical film from the upstream transport unit to the downstream transport unit, The ratio of the third transport speed to the fourth transport speed may be 0.8 or more and 1.2 or less.

  (5) In the method of transporting an optical film according to any one of (1) to (4), after delivering the optical film of the single sheet from the intermittent transport unit to the transport unit, Transport of the optical film is such that the transport speed of the optical film is greater than the transport speed of the single-sheet optical film when the single-sheet optical film is transferred from the intermittent transport section to the transport section. The speed may be increased.

  (6) The optical film conveyance device according to the second aspect of the present invention is an optical film conveyance device for conveying a single-wafer optical film, the supply unit supplying a strip-shaped optical film, and the supply unit A cutting unit that cuts the belt-shaped optical film supplied from the optical film of a predetermined length into a single-sheet optical film, an intermittent transport unit that intermittently transports the single-sheet optical film cut into the predetermined length, A plurality of conveyance units that continuously convey the single-wafer optical film conveyed from the intermittent conveyance unit without stopping, and a control unit that performs overall control of the conveyance device, and the control The sheet is conveyed toward the conveyance unit in the intermittent conveyance unit when the optical film of the single sheet is transferred from the intermittent conveyance unit to the conveyance unit downstream of the intermittent conveyance unit. Optical The second transport speed is made variable so that the first transport speed, which is the transport speed of the film, and the second transport speed, which is the transport speed of the optical film on the single wafer transported on the transport section, are close to each other. When the single-sheet optical film is transferred from the upstream transport unit to the downstream transport unit among the transport units, the sheet is transported from the upstream transport unit toward the downstream transport unit. The third transport speed, which is the transport speed of the single-wafer optical film, and the fourth transport speed, which is the transport speed of the single-wafer optical film transported on the downstream transport section, approach each other. 3 or the transport speed of the fourth transport section is variably controlled.

  (7) In the optical film transport device according to (6), when the control unit delivers the single-layer optical film from the intermittent transport unit to the transport unit, At the end of the intermittent conveyance process, the feeding of the single-sheet optical film may be controlled so that the rear end of the optical film is separated from the intermittent conveyance unit.

  (8) In the optical film transport device according to (6) or (7), the control unit transfers the second optical film from the intermittent transport unit to the transport unit. The ratio of the transport speed to the first transport speed may be controlled to be 0.8 or more and 1.2 or less.

  (9) In the optical film transport apparatus according to any one of (6) to (8), the control unit transfers the single-wafer optical film from the upstream transport unit to the downstream transport unit. At the time of delivery, the ratio of the third conveyance speed to the fourth conveyance speed may be controlled to be 0.8 or more and 1.2 or less.

  (10) In the optical film transport device according to any one of (6) to (9), the control unit transfers the single-wafer optical film from the intermittent transport unit to the transport unit. The conveyance speed of the sheet optical film in the conveyance section is larger than the conveyance speed of the sheet optical film when the sheet optical film is transferred from the intermittent conveyance section to the conveyance section. You may control so that it may become.

  ADVANTAGE OF THE INVENTION According to this invention, the conveyance method and conveying apparatus of an optical film which can avoid the abrasion of an optical film in the conveyance process of an optical film and can suppress the deterioration of the quality of an optical film can be provided.

It is a schematic diagram which shows the conveying apparatus of the optical film which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the principal part of the conveying apparatus which concerns on the same embodiment. It is sectional drawing which shows the principal part of a cutting mechanism in the conveying apparatus which concerns on the same embodiment. It is explanatory drawing which shows operation | movement of the conveying apparatus which concerns on the same embodiment. FIG. 5 is an explanatory diagram illustrating the operation of the transport device following FIG. 4. It is a flowchart which shows the conveyance method of the optical film which concerns on the embodiment. It is a flowchart which shows the conveyance method of an optical film following FIG. It is explanatory drawing which shows operation | movement of the conveying apparatus which concerns on 2nd Embodiment of this invention. FIG. 9 is an explanatory diagram illustrating the operation of the transport device following FIG. 8. FIG. 10 is an explanatory diagram illustrating the operation of the transport device following FIG. 9.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.
In all the following drawings, the dimensions and ratios of the respective constituent elements are appropriately changed in order to make the drawings easy to see. In the following description and drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
FIG. 1 is a schematic diagram illustrating an example of an optical film transport device according to the first embodiment of the present invention. FIG. 2 is a schematic diagram showing a main part of the optical film transport device of the present embodiment.
The conveyance apparatus 1 shown in FIG. 1 conveys optical films, such as a polarizing film and retardation film, which are affixed on the board | substrate of optical display panels, such as a liquid crystal panel and an organic electroluminescent panel, for example. An optical film will not be specifically limited if it is a strip | belt-shaped functional film which has flexibility, In this embodiment, a polarizing film is mentioned as an example and demonstrated.

  As shown in FIG.1 and FIG.2, the conveying apparatus 1 has the supply part 2 which feeds and supplies the strip | belt-shaped polarizing film F, and the cutting mechanism 3 which cut | disconnects the strip | belt-shaped polarizing film F into the sheet | seat of predetermined length in a conveyance direction. (Cutting unit 10), an intermittent transport unit 3A that intermittently transports the polarizing film F cut to a predetermined length, and a transport mechanism 4 that transports the polarizing film F transported from the intermittent transport unit 3A continuously. The unloading mechanism 5 for unloading the polarizing film F transported from the transport mechanism 4 to the next process and the control unit 6 for performing overall control of these mechanisms are included. In addition, “intermittent conveyance” is conveyance including temporarily stopping the polarizing film F in the process of conveying the polarizing film F. Further, “continuously transporting” refers to transporting that continues feeding the polarizing film F without stopping the polarizing film F in the process of transporting the polarizing film F.

  In the supply unit 2, an original fabric roll 7 in which a strip-shaped polarizing film F is rolled is loaded on a bobbin 8. The bobbin 8 is connected to a driving device such as a motor and is rotatable.

  A dancer roller D is disposed between the supply unit 2 and the cutting mechanism 3. The dancer roller D is a polarizing film supplied from the supply unit 2 while the polarizing film F sucked and held by the suction table 9 of the cutting mechanism 3 is cut by the laser device (cutting unit) 10 and the suction holding is released. Absorbs F feed amount.

  A plurality of rollers that form a transport path for the polarizing film F are disposed between the supply unit 2 and the cutting mechanism 3. In the following description, the side approaching the starting point (supply unit 2) of the transport path with respect to an arbitrary position on the transport path is referred to as the upstream side, and the side approaching the end point of the transport path (unloading mechanism 5) is referred to as the downstream side.

  As shown in FIG. 2, the cutting mechanism 3 sandwiches the suction table 9 that sucks and holds the polarizing film F from the back surface, the laser device (cutting unit) 10 that emits a laser that cuts the polarizing film F, and the laser device 10. And a pair of gripping rollers 11 and 12 that grip the polarizing film F on the upstream side and the downstream side, and an alignment camera 13 for confirming the alignment of the polarizing film F.

  In the present embodiment, the cutting mechanism 3 includes two sets of the laser device 10, the pair of gripping rollers 11 and 12, and the alignment camera 13. That is, in this embodiment, the polarizing film F supplied from the supply unit 2 is simultaneously cut at two positions at a predetermined cutting action position, and the single-piece polarizing film F is cut into two pieces by one cutting operation. Transport.

  FIG. 3 is a cross-sectional view showing a main part of the cutting mechanism 3. In FIG. 3, only one set is illustrated for convenience among the two sets of configurations described above.

  As shown in FIG. 3, two holding blocks 9 a and 9 b having the same height are fixed to the upper surface of the suction table 9 in close proximity along the conveyance direction of the polarizing film F. That is, the suction groove 14 orthogonal to the conveyance direction of the polarizing film F is formed by the opposing inner walls of the holding blocks 9a and 9b. The suction groove 14 serves as a scanning path for laser emitted from the laser device 10. The position where the laser is scanned (position where the suction groove 14 is formed) is the cutting action position of the polarizing film F.

  The laser device 10 is horizontally movable so as to cut the polarizing film F along the suction groove 14 (direction orthogonal to the conveying direction of the polarizing film F).

  The gripping rollers 11 and 12 are composed of driving rollers 11a and 12a and elevating rollers 11b and 12b that are disposed to face each other with the polarizing film F interposed therebetween. The gripping rollers 11 and 12 are configured, for example, by covering the surface of a core made of metal with an elastic material such as urethane (hardness of about 30 to 90). The configuration of the gripping rollers 11 and 12 is not limited to this, and a metal roller, a rubber roller, or the like can be used in appropriate combination as necessary.

  The drive rollers 11a and 12a are disposed on the lower surface side of the polarizing film F. The driving rollers 11a and 12a are connected to a driving device such as a motor so that the polarizing film F can be fed out.

  The elevating rollers 11b and 12b are arranged on the upper surface side of the polarizing film F. The raising / lowering of the raising / lowering rollers 11b and 12b is performed by an air cylinder 20 connected via a rod 19 to a bracket 18 screwed to the central axis of the rollers. The elevating rollers 11b and 12b move up and down over an upper standby position and an operating position for gripping the polarizing film F in cooperation with the driving rollers 11a and 12a.

  The alignment camera 13 is disposed above the polarizing film F. From the imaging result of the alignment camera 13, it can be confirmed whether the polarizing film F is accurately aligned, such as whether the polarizing film F is sent out until it reaches a predetermined cutting action position.

  The gripping rollers 11 and 12 function as an intermittent conveyance unit 3 </ b> A that intermittently conveys the polarizing film F cut to a predetermined length to the conveyance mechanism 4 on the downstream side.

  As shown in FIGS. 1 and 2, the transport mechanism 4 is disposed on the downstream side of the first continuous transport conveyor 21 and the first continuous transport conveyor (transport section) 21 disposed on the downstream side of the intermittent transport section 3 </ b> A. Second continuous transfer conveyor (transfer unit) 22. The 1st continuous conveyance conveyor 21 conveys continuously, receiving the polarizing film F conveyed intermittently from 3A of intermittent conveyance parts. The second continuous conveyor 22 continuously conveys the polarizing film F conveyed from the first continuous conveyor 21 while receiving it.

  The first continuous conveyer 21 includes a first conveyer (conveyor) 21a disposed on the downstream side of the intermittent conveyer 3A, and a second conveyer (conveyor) disposed on the downstream side of the first conveyer 21a. ) 21b.

  The first transport conveyor 21a and the second transport conveyor 21b in the present embodiment are set to such a length that the two polarizing films F cut by the cutting mechanism 3 and fed from the intermittent transport section 3A can be plane-held at a predetermined pitch. ing.

  The carry-out mechanism 5 is constituted by a roller conveyor continuously arranged below the end (downstream side) of the transport mechanism 4. A tray 15 for collecting the polarizing film F falling from the transport mechanism 4 (second continuous transport conveyor 22) is disposed at the start end portion of the carry-out mechanism 5.

  When the control unit 6 transfers the single-piece polarizing film F from the intermittent conveyance unit 3A to the first conveyance conveyor 21a downstream of the intermittent conveyance unit 3A, the end of one intermittent conveyance process in the intermittent conveyance unit 3A is completed. At the time, the feeding of the single-piece polarizing film F is controlled so that the rear end of the polarizing film F is separated from the intermittent conveyance unit 3A. Specifically, the cut polarizing film F is fed so that the rear end thereof exceeds the intermittent transport unit 3A during the next intermittent transport, and is delivered to the first transport conveyor 21a downstream of the intermittent transport unit 3A. . “Send out beyond the intermittent conveyance part 3A” means that the rear end of the cut sheet polarizing film F is separated from the intermittent conveyance part 3A, that is, the rear end of the cut sheet polarizing film F Means to be separated from the conveyance roller located on the most downstream side of the intermittent conveyance unit 3A. Thereby, the polarizing film F after cutting | disconnection is mounted on the 1st conveyance conveyor 21a of a downstream side exceeding 3 A of intermittent conveyance parts.

  When the control unit 6 delivers the polarizing film F from the intermittent transport unit 3A to the first transport conveyor 21a, the control unit 6 changes the transport speed of the polarizing film F in the first transport conveyor 21a to the transport speed of the polarizing film F in the intermittent transport unit 3A. Move closer.

  When the control unit 6 delivers the polarizing film F from the intermittent transport unit 3A to the first transport conveyor 21a, the control unit 6 changes the transport speed of the polarizing film F in the first transport conveyor 21a to the transport speed of the polarizing film F in the intermittent transport unit 3A. It is desirable to control so that they are approximately the same. Here, “substantially match” means the speed at which the polarizing film F is transported by the intermittent transport section 3A (drive rollers 11a, 12a) and the speed at which the polarizing film F is transported by the first transport conveyor 21a. This means that the polarizing film F conveyed between the two may be slightly different as long as no significant rubbing occurs. For example, the ratio V2 / V1 between the speed V1 when the polarizing film F is transported by the intermittent transport unit 3A and the speed V2 when the polarizing film F is transported by the first transport conveyor 21a is 0.8 / 1 or more and 1.2. If the range is less than or equal to / 1, it can be said that the speeds of the two are almost the same. If it is such a range, the rubbing of the polarizing film F by the conveyance speed difference of 3 A of intermittent conveyance parts and the 1st conveyance conveyor 21a can fully be suppressed.

  The control unit 6 separates the polarizing film F delivered from the intermittent conveying unit 3A to the first conveying conveyor 21a, and the trailing end of the polarizing film is separated from the leading end of the polarizing film F which is subsequently delivered to the first conveying conveyor 21a. Accelerate to do. That is, after delivering the sheet of polarizing film F from the intermittent conveying unit 3A to the first conveying conveyor 21a downstream of the intermittent conveying unit 3A, the conveying speed of the sheet polarizing film F is changed from the intermittent conveying unit 3A. The conveyance speed of the first conveyance conveyor 21a is increased so as to be higher than the conveyance speed of the single-piece polarization film F when the single-sheet polarization film F is delivered to the first conveyance conveyor 21a. Thereby, on the 1st conveyance conveyor 21a, the two polarizing films F after a cutting | disconnection are conveyed at intervals with the two polarizing films F on the intermittent conveyance part 3A delivered next.

  When the control unit 6 delivers the polarizing film F from the first conveying conveyor 21a to the second conveying conveyor 21b, the controller 6 determines the conveying speed of the polarizing film F on the first conveying conveyor 21a to convey the polarizing film F on the second conveying conveyor 21b. It is desirable to approximately match the speed. Here, “substantially match” is based on the same idea as V2 / V1 described above, and the transport speed of the polarizing film F on the first transport conveyor 21a and the transport of the polarizing film F on the second transport conveyor 21b. If the speed ratio is in the range of 0.8 / 1 or more and 1.2 / 1 or less, it can be said that the speeds of both are almost the same. And the polarizing film F accelerated by the 1st conveyance conveyor 21a is delivered to the 2nd conveyance conveyor 21b.

  The control unit 6 sends out the rear end of the polarizing film F at the head of the second transport conveyor 21b delivered from the first transport conveyor 21a so as to exceed the second transport conveyor 21b, and downstream of the second transport conveyor 21b. To the second continuous transfer conveyor 22 following to. Accordingly, the polarizing film F is placed on the second continuous transport conveyor 22 on the downstream side beyond the second transport conveyor 21b.

  When the polarizing film F is transferred from the second transport conveyor 21b to the second continuous transport conveyor 22, the transport speed of the polarizing film F on the second transport conveyor 21b is made closer to the transport speed of the polarizing film F on the second continuous transport conveyor 22. .

  When the control unit 6 delivers the polarizing film F from the second transport conveyor 21b to the second continuous transport conveyor 22, the control unit 6 sets the transport speed of the polarizing film F in the second transport conveyor 21b to the polarizing film F in the second continuous transport conveyor 22. It is desirable to perform control so as to substantially match the conveyance speed. Here, “substantially match” means that the speed when the polarizing film F is transported at a reduced speed by the second transport conveyor 21b and the speed when the polarizing film F is transported by the second continuous transport conveyor 22 are It means that the polarizing film F conveyed across the surface may be slightly different as long as no significant rubbing occurs. For example, the ratio V3 / V2b between the speed V2b when the polarizing film F is transported at a reduced speed on the second transporting conveyor 21b and the speed V3 when transporting the polarizing film F on the second continuous transporting conveyor 22 is 0.8 / 1 or more. If it is in the range of 1.2 / 1 or less, it can be said that the speeds of the two are almost the same. If it is such a range, the rubbing of the polarizing film F by the conveyance speed difference of the 2nd conveyance conveyor 21b and the 2nd continuous conveyance conveyor 22 can fully be suppressed.

  In the present embodiment, the control unit 6 includes a computer system. This computer system includes an arithmetic processing unit 6a such as a CPU and a storage unit 6b such as a memory or a hard disk. In addition, the control unit 6 includes an interface capable of executing communication with an external device of the computer system. The control unit 6 may be connected to an input device that can input an input signal. The input device includes an input device such as a keyboard and a mouse, or a communication device that can input data from a device external to the computer system. The control unit 6 may include a display device such as a liquid crystal display that indicates the operation status of each unit of the transport device 1 or may be connected to the display device.

  An operating system (OS) for controlling the computer system is installed in the storage unit 6b of the control unit 6. The storage unit 6b of the control unit 6 stores a program that causes the arithmetic processing unit 6a to control each unit of the transport device 1 so that each unit of the transport device 1 performs processing for accurately transporting the polarizing film F. ing. Various types of information including programs recorded in the storage unit 6b can be read by the arithmetic processing unit 6a of the control unit 6. The control unit 6 may include a logic circuit such as an ASIC that executes various processes required for controlling each unit of the transport apparatus 1.

  In the present embodiment, data (recipe) for conveying the polarizing film F is set in the storage unit 6 b of the control unit 6 in advance. For example, the length of the polarizing film F in a single sheet is 406.6 mm, and the pitch P (the distance between the trailing edge of the leading polarizing film F and the leading edge of the subsequent polarizing film F in the conveying process) is 51.4 mm. Is set in the storage unit 6b. In this embodiment, since the 2nd conveyance conveyor 21b operate | moves so that the polarizing film F can get over the 2nd continuous conveyance conveyor 22 completely, the gap of the 2nd conveyance conveyor 21b and the 2nd continuous conveyance conveyor 22 is a polarizing film. It is set to a pitch P or less of F.

  4 and 5 are explanatory diagrams illustrating the operation of the transport apparatus 1 according to the present embodiment. FIG.6 and FIG.7 is a flowchart of the conveyance method of the polarizing film of this embodiment. Hereinafter, operation | movement until it cut | disconnects and carries out strip | belt-shaped polarizing film F using the conveying apparatus 1 is demonstrated.

  First, the original roll 7 of the polarizing film F to be used is loaded into the supply unit 2. After this loading is completed, the operator makes initial settings using the operation panel or the like (step S1 shown in FIG. 6). For example, the cutting length, the thickness, the supply speed, the laser output and the focal depth of the polarizing film F, the feeding speed of the driving roller 12a, the transport speed of the first transport conveyor 21a, the transport speed of the second transport conveyor 21b, and the second continuous The conveyance speed of the conveyance conveyor 22 is set.

  When the initial setting is completed, the supply of the polarizing film F from the raw roll 7 is started, and the rotational speed of a drive shaft such as a motor provided in the supply unit 2 is detected by a sensor such as a rotary encoder (not shown). The polarizing film F is supplied from the supply unit 2 (step S2 shown in FIG. 6).

  The polarizing film F supplied from the supply part 2 is conveyed to the cutting mechanism 3 (refer Fig.4 (a)). When the leading end of the polarizing film F passes the gripping rollers 11 and 12 and reaches the predetermined position K1, the elevating rollers 11b and 12b are operated under the control of the control unit 6. Thereby, the polarizing film F is gripped on both sides of the suction table 9. Specifically, the air cylinder 20 connected to both rollers 11b and 12b synchronizes, and simultaneously lowers both rollers 11b and 12b (see FIG. 4B).

  In addition, under the control of the control unit 6, a suction device (not shown) is operated in this state, and the polarizing film F is sucked and held on the suction table 9.

  In conjunction with these operations, the dancer roller D is operated under the control of the control unit 6. Thereby, it adjusts so that the polarizing film F supplied continuously from the supply part 2 may not be drawn out after the dancer roller D.

  When the polarizing film F is sucked and held on the suction table 9, the laser device 10 is operated under the control of the control unit 6 (see FIG. 4C). Thereby, the polarizing film F sucked and held on the suction table 9 is cut along the suction grooves 14. As a result, the strip-shaped polarizing film F is cut into sheets having a predetermined length (step S3 shown in FIG. 6).

  When the polarizing film F is cut, the suction of the suction table 9 to the polarizing film F and the gripping by the gripping rollers 11 and 12 are released (see FIG. 4D). In conjunction with this release operation, the control rollers 6 control the drive rollers 11a, 12a, the first continuous transport conveyor 21 (the first transport conveyor 21a, the second transport conveyor 21b), and the second continuous transport conveyor 22 to operate. To do.

  The control unit 6 reads an optimum recipe from the storage unit 6b based on the initial setting. In accordance with this recipe, the control unit 6 is driven so that the single-sheet polarizing film F that is intermittently drawn from the upstream cutting mechanism 3 is plane-held at a predetermined pitch with respect to the polarizing film F on the first conveyor 21a. Operation control of the rollers 11a and 12a and the 1st conveyance conveyor 21a is carried out.

  At the same time, the operation of the driving rollers 11a and 12a is controlled so that the trailing edge of the polarizing film F after being cut is sent out beyond the intermittent conveying portion 3A during the next intermittent conveyance. The intermittent transport unit 3A (drive rollers 11a and 12a) transports the cut polarizing film F to the first transport conveyor 21a (step S4 shown in FIG. 6).

  Under the control of the control unit 6, the polarizing film F is transported at the first transport conveyor 21a and the polarizing film F is transported at the intermittent transport unit 3A when the polarizing film F is transferred from the intermittent transport unit 3A to the first transport conveyor 21a. Are controlled so as to substantially match. In the present embodiment, the speed V1 when the polarizing film F is transported by the intermittent transport unit 3A is 90 m / min, and the speed V2 when the polarizing film F is transported by the first transport conveyor 21a is 90 m / min. The speeds V1 and V2 are controlled to be equal to each other.

  When the polarizing film F is transferred from the intermittent conveying unit 3A to the first conveying conveyor 21a, it is determined whether or not the rear end of the polarizing film F after being cut exceeds the intermittent conveying unit 3A (step S5 shown in FIG. 6). ). For example, the determination as to whether or not the rear end of the polarizing film F after cutting has exceeded the intermittent conveyance unit 3 </ b> A is performed by a time table stored in advance in the storage unit 6 b of the control unit 6. Specifically, a predetermined length when the polarizing film F is cut in the initial setting, the rotation speeds of the driving rollers 11a and 12a in the intermittent conveyance unit 3A (conveying speed of the polarizing film F), and the intermittent conveyance unit 3A and the first conveyance The distance between the conveyor 21a is set. Thereby, it can be determined whether how much time the polarizing film F is conveyed in the intermittent conveyance part 3A, if the rear end of the polarizing film F after a cutting | disconnection exceeded the intermittent conveyance part 3A.

  And when it determines with the rear end of the polarizing film F after cut | disconnecting exceeding the intermittent conveyance part 3A (Yes), the operation | movement which delivers the polarizing film F to the 1st conveyance conveyor 21a is completed (in FIG. 6). Step S6). Thereby, the polarizing film F after cutting | disconnection is mounted on the 1st conveyance conveyor 21a of a downstream side exceeding 3 A of intermittent conveyance parts (refer FIG.4 (e)).

  When it is determined that the rear end of the polarizing film F after cutting does not exceed the intermittent transport unit 3A (No), the rear end of the polarizing film F after cutting exceeds the intermittent transport unit 3A (Yes). Until the determination is made, the conveyance of the polarizing film F is continued (step S7 shown in FIG. 6).

  When the operation of transferring the polarizing film F to the first transport conveyor 21a is completed, the polarizing film F transferred to the first transport conveyor 21a by the control of the control unit 6 has the rear end next to the first transport conveyor 21a. Is accelerated so as to be separated by a predetermined pitch P from the tip of the polarizing film F delivered to (see FIG. 5A, step S8 shown in FIG. 7).

  In this embodiment, the speed V2a after accelerating the polarizing film F by the first transport conveyor 21a is 103.5 m / min, and the speed V1 (90 m / min) when the polarizing film F is transported by the intermittent transport section 3A. The speed V2a of the polarizing film F after acceleration is controlled to be larger than that (V2a> V1).

  And by control of the control part 6, the conveyance speed of the polarizing film F in the 1st conveyance conveyor 21a at the time of delivering the polarizing film F from the 1st conveyance conveyor 21a to the 2nd conveyance conveyor 21b, and the polarizing film in the 2nd conveyance conveyor 21b Control is performed so that the conveyance speed of F substantially matches. Thereby, the polarizing film F accelerated by the 1st conveyance conveyor 21a is delivered to the 2nd conveyance conveyor 21b at a fixed speed | rate (103.5 m / min).

  The accelerated polarizing film F is transported by a predetermined distance on the second transport conveyor 21b (see FIG. 5B). Thereafter, under the control of the control unit 6, the transport speed of the polarizing film F in the second transport conveyor 21 b when the polarizing film F is transferred from the second transport conveyor 21 b to the second continuous transport conveyor 22 is set to the second continuous transport conveyor 22. It can be brought close to the conveyance speed of the polarizing film F. Specifically, when the tip of the accelerated polarizing film F reaches the predetermined position K2 on the second transport conveyor 21b, the polarizing film F on the second transport conveyor 21b is decelerated under the control of the control unit 6 (FIG. 5 (c), step S9 shown in FIG.

  That the tip of the polarizing film F has reached the predetermined position K2 is confirmed by the deceleration sensor 23 disposed above the second transport conveyor 21b. When the deceleration sensor 23 detects the leading end of the accelerated polarizing film F, the accelerated polarizing film F is decelerated under the control of the control unit 6.

  The decelerated polarizing film F is conveyed to the 2nd continuous conveyance conveyor 22 (refer FIG.5 (d), step S10 shown in FIG. 7).

  Under the control of the control unit 6, when the polarizing film F is transferred from the second conveying conveyor 21 b to the second continuous conveying conveyor 22, the conveying speed of the polarizing film F on the second conveying conveyor 21 b and the polarizing film on the second continuous conveying conveyor 22 are determined. Control is performed so that the conveyance speed of F substantially matches. Here, “substantially coincides” is a ratio between the speed V2b of the polarizing film F after deceleration in the second transport conveyor 21b and the speed V3 when the polarizing film F is transported by the second continuous transport conveyor 22. V3 / V2b is in the range of 0.8 / 1 to 1.2 / 1. In this embodiment, the speed V2b after decelerating the polarizing film F by the second transport conveyor 21b is 50 m / min, and the speed V3 when transporting the polarizing film F by the second continuous transport conveyor 22 is 60 m / min. Control is performed so that the conveyance speeds V2b and V3 are substantially the same.

  At the time of the above delivery, it is determined whether or not the rear end of the polarizing film F after deceleration has exceeded the second transport conveyor 21b (step S11 shown in FIG. 7). For example, whether or not the rear end of the polarizing film F after deceleration exceeds the second transport conveyor 21b is confirmed by the acceleration sensor 24 disposed above the second transport conveyor 21b. When the acceleration sensor 24 detects the rear end of the polarizing film F after deceleration, the transport speed of the second transport conveyor 21b is switched under the control of the control unit 6.

  When the acceleration sensor 24 detects the trailing edge of the polarizing film F after being decelerated, the conveyance speed of the second conveying conveyor 21b is controlled by the control unit 6 from 50 m / min during deceleration to 103.5 m / min during acceleration. Is switched to. Thereby, it becomes possible to smoothly deliver the polarizing film F accelerated by the first transport conveyor 21a to the second transport conveyor 21b.

  And when it determines with the rear end of the polarizing film F after deceleration having exceeded the 2nd conveyance conveyor 21b (Yes), the operation | movement which delivers this polarizing film F to the 2nd continuous conveyance conveyor 22 is completed ( Step S12 shown in FIG. Thereby, the polarizing film F after deceleration passes over the 2nd conveyance conveyor 21b, and is mounted on the 2nd continuous conveyance conveyor 22 of a downstream (refer FIG.5 (e)).

  When it is determined that the rear end of the polarizing film F after deceleration does not exceed the second transport conveyor 21b (No), the rear end of the polarizing film F after deceleration exceeds the second transport conveyor 21b (Yes) ) Is continued (step S13 shown in FIG. 7).

  When the operation of delivering the polarizing film F to the second continuous conveyance conveyor 22 is completed, the polarizing film F delivered to the second continuous conveyance conveyor 22 is conveyed toward the carry-out mechanism 5.

  A tray 15 is disposed at the start end portion of the carry-out mechanism 5. Accordingly, the polarizing film F falling from the end position of the transport mechanism 4 is sequentially stored in the tray 15.

  The above series of operations is repeated, and after a predetermined number of polarizing films F are laminated on the tray 15, the tray 15 is retracted to the retracted position. Thereafter, the carry-out mechanism 5 is operated to carry out the laminated polarizing film F to the next step.

According to the optical film transport method and the transport device 1 as described above, the polarizing film F that is intermittently fed out from the cutting mechanism 3 is fed so that the rear end thereof exceeds the intermittent transport unit 3A during the next intermittent transport. It is delivered to the first transport conveyor 21a that continues downstream of the intermittent transport unit 3A. For this reason, it can avoid that the front-end | tip part of the polarizing film F cut | disconnected by 3 A of intermittent conveyance parts stops and rubs, contacting the 1st conveyance conveyor 21a. In addition, when the polarizing film F is transferred from the intermittent conveying unit 3A to the first conveying conveyor 21a, the conveying speed of the polarizing film F in the first conveying conveyor 21a can be made closer to the conveying speed of the polarizing film F in the intermittent conveying unit 3A. In addition, the delivery from the intermittent conveyance unit 3A to the first conveyance conveyor 21a becomes smooth. As a result, it is possible to avoid the polarizing film F from being rubbed due to a speed difference between the intermittent conveyance unit 3A and the first conveyance conveyor 21a. Furthermore, when the polarizing film F is transferred from the second transport conveyor 21b to the second continuous transport conveyor 22, the transport speed of the polarizing film F on the second transport conveyor 21b is the transport speed of the polarizing film F on the second continuous transport conveyor 22. Therefore, the delivery from the second conveyor 21b to the second continuous conveyor 22 becomes smooth. As a result, it is possible to avoid the polarizing film F from being rubbed due to a speed difference between the second conveyor 21b and the second continuous conveyor 22.
Accordingly, it is possible to avoid rubbing of the polarizing film F in the process of transporting the polarizing film F, and to suppress deterioration of the quality of the polarizing film F.

  Further, since the speed V1 when the polarizing film F is transported by the intermittent transport unit 3A and the speed V2 when the polarizing film F is transported by the first transport conveyor 21a are controlled to be equal to each other, the polarizing film F Can be transferred more smoothly from the intermittent transfer section 3A to the first transfer conveyor 21a. Thereby, it can avoid that the polarizing film F rubs by the speed difference between the intermittent conveyance part 3A and the 1st conveyance conveyor 21a.

  Furthermore, since the speed V2b after the polarizing film F is decelerated by the second transport conveyor 21b and the speed V3 when the polarizing film F is transported by the second continuous transport conveyor 22 are controlled so as to substantially coincide, The film F can be delivered more smoothly from the second conveyor 21b to the second continuous conveyor 22. Thereby, it can avoid that the polarizing film F rubs by the speed difference between the 2nd conveyance conveyor 21b and the 2nd continuous conveyance conveyor 22. FIG.

  Moreover, since the rear end of the polarizing film F delivered to the first transport conveyor 21a is accelerated so as to be separated from the front end of the polarizing film F delivered to the first transport conveyor 21a, it is cut by the cutting mechanism 3. It is possible to avoid collision of the front and rear polarizing films F when the polarizing films F are sent to the first conveyor 21a.

  Moreover, the polarizing film F is accelerated in the 1st conveyance conveyor 21a, and the polarizing film F accelerated in the 2nd conveyance conveyor 21b is decelerated. That is, the conveyance speed of the polarizing film F can be variably controlled by the first conveyance conveyor 21a and the second conveyance conveyor 21b separately. Therefore, variably controlling the conveyance speed of the polarizing film F can be easily realized.

  In this embodiment, although the case where the number of sheets of the polarizing film F cut | disconnected by the cutting | disconnection mechanism 3 was mentioned as an example was demonstrated, it does not restrict to this. For example, the number of sheets of polarizing film F cut by the cutting mechanism 3 may be one, or may be three or more.

  Moreover, in this embodiment, although demonstrated taking the polarizing film as an example as an optical film, it is not restricted to this, It can apply also to a polarizing film with a separator.

  Moreover, in this embodiment, although the 1st continuous conveyance conveyor 21 gave and demonstrated the example comprised provided with the 1st conveyance conveyor 21a and the 2nd conveyance conveyor 21b, it does not restrict to this. For example, the first continuous transfer conveyor 21 may be configured to include only one transfer conveyor, or may be configured to include three or more transfer conveyors.

  Moreover, in this embodiment, although demonstrated as an example the structure which accelerates | stimulates the polarizing film F in the 1st conveyance conveyor 21a, and decelerates the polarizing film F after acceleration in the 2nd conveyance conveyor 21b, it does not restrict to this. . For example, the present invention can be applied to a configuration in which the polarizing film F is accelerated on the first transport conveyor 21a and the accelerated polarizing film F is decelerated.

(Second Embodiment)
8-10 is explanatory drawing which shows operation | movement of the conveying apparatus of 2nd Embodiment of this invention. Hereinafter, operation | movement until it cuts and carries out the strip | belt-shaped polarizing film F using the conveying apparatus of 2nd Embodiment is demonstrated. The operation of the transport device of the present embodiment is that the number of sheets of polarizing film F placed on the first transport conveyor 21a is one, the polarizing film F is accelerated on the first transport conveyor 21a and after acceleration. The point which decelerates the polarizing film F of this differs from the operation | movement of the conveying apparatus of the said 1st Embodiment.

  In addition, since it is the same as that of the said 1st Embodiment, the process from loading the raw fabric roll 7 of the polarizing film F to be used to the supply part 2 and performing the initial setting of a conveying apparatus is abbreviate | omitted detailed description.

  The polarizing film F supplied from the supply part 2 is conveyed to the cutting mechanism 3 (refer Fig.8 (a)). When the leading end of the polarizing film F passes the gripping roller 12 and reaches a predetermined position K1, the elevating rollers 11b and 12b are operated under the control of the control unit 6. Thereby, the polarizing film F is gripped on both sides of the suction table 9. Specifically, the air cylinder 20 connected to both rollers 11b and 12b is synchronized, and simultaneously lowers both rollers 11b and 12b (see FIG. 8B).

  In addition, under the control of the control unit 6, a suction device (not shown) is operated in this state, and the polarizing film F is sucked and held on the suction table 9.

  In conjunction with these operations, the dancer roller D is operated under the control of the control unit 6. Thereby, it adjusts so that the polarizing film F supplied continuously from the supply part 2 may not be drawn out after the dancer roller D.

  When the polarizing film F is sucked and held on the suction table 9, the laser device 10 is operated under the control of the control unit 6 (see FIG. 8C). Thereby, the polarizing film F sucked and held on the suction table 9 is cut along the suction grooves 14. As a result, the strip-shaped polarizing film F is cut into sheets (one sheet) having a predetermined length.

  When the polarizing film F is cut, the suction of the suction table 9 to the polarizing film F and the gripping by the gripping rollers 11 and 12 are released (see FIG. 8D). In conjunction with this release operation, the control rollers 6 control the drive rollers 11a, 12a, the first continuous transport conveyor 21 (the first transport conveyor 21a, the second transport conveyor 21b), and the second continuous transport conveyor 22 to operate. To do.

  The polarizing film F after cutting is placed on the first transport conveyor 21a on the downstream side beyond the intermittent transport section 3A (see FIG. 8E).

  When the operation of transferring the polarizing film F to the first transport conveyor 21a is completed, the polarizing film F transferred to the first transport conveyor 21a by the control of the control unit 6 has the rear end next to the first transport conveyor 21a. Is accelerated so as to be separated by a predetermined pitch P from the tip of the polarizing film F delivered to (see FIG. 9A).

  In this embodiment, the speed V2a after accelerating the polarizing film F by the first transport conveyor 21a is 103.5 m / min, and the speed V1 (90 m / min) when the polarizing film F is transported by the intermittent transport section 3A. The speed V2a of the polarizing film F after acceleration is controlled to be larger than that (V2a> V1).

  The accelerated polarizing film F travels on the first conveyor 21a by a predetermined distance (see FIG. 9B). Thereafter, under the control of the control unit 6, when the polarizing film F is transferred from the first conveying conveyor 21a to the second conveying conveyor 21b, the conveying speed of the polarizing film F in the first conveying conveyor 21a is the polarizing film in the second conveying conveyor 21b. F can be brought close to the conveyance speed. Specifically, when the tip of the accelerated polarizing film F reaches the predetermined position K3 on the first conveyor 21a, the accelerated polarizing film F is decelerated under the control of the control unit 6 (FIG. 9 (c). )reference).

  It is confirmed by the deceleration sensor 25 disposed above the first conveyor 21a that the tip of the accelerated polarizing film F has reached the predetermined position K3. When the deceleration sensor 25 detects the tip of the accelerated polarizing film F, the accelerated polarizing film F is decelerated under the control of the control unit 6.

  Under the control of the control unit 6, the polarizing film F on the first transport conveyor 21a when the polarizing film F is transferred from the first transport conveyor 21a to the second transport conveyor 21b, and the polarizing film F on the second transport conveyor 21b. It is desirable to control so that it substantially coincides with the conveyance speed. Here, “substantially coincides” means a ratio V5 / V4 between the conveyance speed V4 of the polarizing film F after deceleration on the first conveyance conveyor 21a and the speed V5 when the polarization film F is conveyed on the second conveyance conveyor 21b. Is in the range of 0.8 / 1 to 1.2 / 1. In this embodiment, the speed V4 after decelerating the polarizing film F by the first transport conveyor 21a is 42 m / min, the speed V5 when transporting the polarizing film F by the second transport conveyor 21b is 50 m / min, Control is performed so that the conveyance speeds V4 and V5 substantially coincide with each other.

  The polarizing film F after deceleration is conveyed from the 1st conveyance conveyor 21a to the 2nd conveyance conveyor 21b (refer FIG.9 (d)). At this time, it is determined whether or not the rear end of the polarizing film F after deceleration has exceeded the first conveyor 21a. For example, whether or not the rear end of the polarizing film F after deceleration exceeds the first transport conveyor 21a is determined by the acceleration sensor 26 disposed above the first transport conveyor 21a. When the acceleration sensor 26 detects the rear end of the polarizing film F after being decelerated, the conveyance speed of the first conveyance conveyor 21a is switched under the control of the control unit 6.

  In the present embodiment, the transport speed of the first transport conveyor 21a is switched from 42 m / min during deceleration to 90 m / min during normal operation. Thereby, it becomes possible to receive smoothly the polarizing film F sent out from 3 A of intermittent conveyance parts.

  And when it determines with the rear end of the polarizing film F after deceleration having exceeded the 1st conveyance conveyor 21a, the operation | movement which delivers the polarizing film F to the 2nd conveyance conveyor 21b is completed. Thereby, the polarizing film F after deceleration passes over the 1st conveyance conveyor 21a, and is mounted on the 2nd conveyance conveyor 21b of a downstream (refer FIG.9 (e)).

  When it is determined that the rear end of the polarizing film F after deceleration does not exceed the first transport conveyor 21a, until it is determined that the rear end of the polarizing film F after deceleration exceeds the first transport conveyor 21a, The conveyance of the polarizing film F is continued.

  When the operation of delivering the polarizing film F to the second conveyor 21b is completed, the polarizing film F delivered to the second conveyor 21b is conveyed toward the second continuous conveyor 22 (FIG. 10A). reference).

  Under the control of the control unit 6, when the polarizing film F is transferred from the second conveying conveyor 21 b to the second continuous conveying conveyor 22, the conveying speed of the polarizing film F on the second conveying conveyor 21 b and the polarizing film on the second continuous conveying conveyor 22 are determined. Control is performed so that the conveyance speed of F substantially matches.

  And the polarizing film F delivered to the 2nd continuous conveyance conveyor 22 is conveyed toward the carrying out mechanism 5 (refer FIG.10 (b)).

  A tray 15 is disposed at the start end portion of the carry-out mechanism 5. Accordingly, the polarizing film F falling from the end position of the transport mechanism 4 is sequentially stored in the tray 15.

  The above series of operations is repeated, and after a predetermined number of polarizing films F are laminated on the tray 15, the tray 15 is retracted to the retracted position. Thereafter, the carry-out mechanism 5 is operated to carry out the laminated polarizing film F to the next step.

  According to this embodiment, it can avoid that the front-end | tip part of the polarizing film F cut | disconnected by 3 A of intermittent conveyance parts stops and rubs with contacting the 1st conveyance conveyor 21a. Moreover, when sending out the polarizing film F cut | disconnected by the cutting mechanism 3 to the 1st conveyance conveyor 21a, it can avoid that the polarizing films F before and behind collide. Furthermore, it is possible to avoid the tip portion of the polarizing film F decelerated by the first conveyor 21a from being shifted (accelerated) and rubbed while being in contact with the second conveyor 21b. Therefore, the deterioration of the quality of the polarizing film F can be suppressed.

  Moreover, while accelerating the polarizing film F in the 1st conveyance conveyor 21a, this accelerated polarizing film F is decelerated. That is, the conveyance speed of the polarizing film F can be variably controlled only by the first conveyance conveyor 21a. Therefore, variably controlling the conveyance speed of the polarizing film F can be realized with a simple configuration.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the conveyance method and conveying apparatus of an optical film which can avoid the abrasion of an optical film in the conveyance process of an optical film and can suppress the deterioration of the quality of an optical film can be provided.

DESCRIPTION OF SYMBOLS 1 ... Conveyance device, 2 ... Supply part, 3 ... Cutting mechanism, 3A ... Intermittent conveyance part, 4 ... Conveyance mechanism, 6 ... Control part, 10 ... Laser apparatus (cutting part), 21 ... 1st continuous conveyance conveyor (conveyance part) ), 21a... 1st transport conveyor (transport section), 21b... 2nd transport conveyor (transport section), 22... 2nd continuous transport conveyor (transport section), V1. Transport speed of the optical film in the intermittent transport section when handing over to the first continuous transport conveyor when delivering the optical film from the intermittent transport section to the first continuous transport conveyor, V2a ... optical film Of the optical film after being accelerated by the first conveyor, V2b... The first continuous conveyor for transferring the optical film from the first continuous conveyor to the second continuous conveyor. V3, the optical film transport speed, V3, the optical film transport speed at the second continuous transport conveyor when the optical film is transferred from the first continuous transport conveyor to the second continuous transport conveyor, V4, after the deceleration at the first transport conveyor. Optical film transport speed, V5: transport speed when transporting polarizing film on second transport conveyor

Claims (10)

An optical film transport method for transporting a single wafer optical film,
A cutting step of cutting the optical film in a band shape into a sheet of a predetermined length at the cutting portion;
An intermittent conveyance step of intermittently conveying the single-wafer optical film obtained in the cutting step in an intermittent conveyance unit;
A continuous conveying step of continuously conveying the optical film of the single wafer that has been conveyed from the intermittent conveying unit without stopping at a plurality of conveying units downstream of the intermittent conveying unit;
Including
The first transport that is the transport speed of the single-wafer optical film that is transported toward the transport unit in the intermittent transport unit when the single-sheet optical film is transferred from the intermittent transport unit to the transport unit. The second transport speed is variably controlled so that the speed and the second transport speed, which is the transport speed of the optical film of the single wafer transported in the transport section, approach each other.
Of the plurality of transport units, the single wafer transported from the upstream transport unit toward the downstream transport unit when the optical film is transferred from the upstream transport unit to the downstream transport unit. The third transport speed, which is the transport speed of the optical film, and the fourth transport speed, which is the transport speed of the single-layer optical film transported on the downstream transport section, approach each other. A method for transporting an optical film, wherein the transport speed or the fourth transport speed is variably controlled.   When delivering the single-wafer optical film from the intermittent transport unit to the transport unit, the rear end of the optical film is separated from the intermittent transport unit at the end of the intermittent transport process in the intermittent transport unit. The method for transporting an optical film according to claim 1, wherein the single-wafer optical film is sent out.   The ratio of the second transport speed to the first transport speed is set to 0.8 or more and 1.2 or less when the single-wafer optical film is transferred from the intermittent transport section to the transport section. The method for transporting an optical film according to claim 1 or 2.   The ratio of the third transport speed to the fourth transport speed is 0.8 or more and 1.2 or less when the optical film of the single wafer is transferred from the upstream transport section to the downstream transport section. The method for transporting an optical film according to claim 1 or 2.   After delivering the sheet optical film from the intermittent conveyance unit to the conveyance unit, the conveyance speed of the sheet optical film is transferred from the intermittent conveyance unit to the conveyance unit. The method for transporting an optical film according to claim 1, wherein the transport speed of the transport unit is increased so as to be greater than the transport speed of the optical film of the single sheet at the time. An optical film transport device for transporting a single wafer optical film,
A supply unit for supplying a strip-shaped optical film;
A cutting unit for cutting the strip-shaped optical film supplied from the supply unit into a sheet of optical film of a predetermined length;
An intermittent transport unit that intermittently transports the optical film of the single wafer cut into the predetermined length;
A plurality of transport units that continuously transport without stopping while receiving the optical film of the single sheet transported from the intermittent transport unit;
A control unit that performs overall control of the transfer device;
With
The control unit is transported toward the transport unit in the intermittent transport unit when delivering the optical film of the single wafer from the intermittent transport unit to the transport unit downstream of the intermittent transport unit. The second transport so that the first transport speed, which is the transport speed of the sheet optical film, approaches the second transport speed, which is the transport speed of the sheet optical film transported on the transport section. The speed is variably controlled, and when the optical film of the single wafer is transferred from the upstream side conveyance unit to the downstream side conveyance unit, the upstream conveyance unit is directed to the downstream conveyance unit. The third transport speed, which is the transport speed of the single-wafer optical film transported in this manner, approaches the fourth transport speed, which is the transport speed of the single-wafer optical film transported on the downstream transport section. The third transport speed or the Conveying apparatus of the optical film characterized by variably controlling the fourth transport speed of the transport unit of.   When the control unit transfers the single-wafer optical film from the intermittent conveyance unit to the conveyance unit, at the end of one intermittent conveyance step in the intermittent conveyance unit, The apparatus for transporting an optical film according to claim 6, wherein the feeding of the optical film of the single wafer is controlled so that a rear end is separated.   The controller, when transferring the optical film of the single wafer from the intermittent transport unit to the transport unit, sets a ratio of the second transport speed to the first transport speed of 0.8 to 1.2. The apparatus for transporting an optical film according to claim 6 or 7, wherein control is performed so that   The controller, when transferring the single-sheet optical film from the upstream transport unit to the downstream transport unit, sets a ratio of the third transport speed to the fourth transport speed of 0.8 or more and 1 The apparatus for transporting an optical film according to claim 6 or 7, wherein the optical film transport device is controlled to be equal to or less than .2.   The controller, after delivering the sheet optical film from the intermittent transport unit to the transport unit, changes the transport speed of the sheet optical film in the transport unit from the intermittent transport unit to the transport unit. 8. The optical film transport device according to claim 6, wherein the optical film transport device is controlled so as to be higher than a transport speed of the single-wafer optical film when the single-wafer optical film is delivered.

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