CN103562104B - The carrying method of blooming and feedway - Google Patents

Abstract

The present invention provides an optical film conveying method and a conveying device, the optical film conveying method comprising: an intermittent conveying process of intermittently conveying the optical film through an intermittent conveying unit (3A); A continuous conveyance process in which the conveyed optical film is conveyed continuously in a plurality of conveyance units. When the optical film is transferred from the intermittent conveying unit (3A) to the conveying unit, the second conveying speed is variably controlled so that the first conveying speed and the second conveying speed are substantially similar, and the The first transport speed is the transport speed of the optical film transported to the transport unit by the intermittent transport unit (3A), and the second transport speed is the transport speed of the optical film transported on the transport unit. speed. In the plurality of conveying units, when transferring the optical film from the upstream conveying unit to the downstream conveying unit, the third conveying speed or the fourth conveying speed is variably controlled so that the third conveying speed substantially similar to a fourth conveying speed, the third conveying speed is the conveying speed for conveying the optical film from the upstream conveying part to the downstream conveying part, and the fourth conveying speed is the conveying speed for the downstream conveying The conveying speed of the optical film being conveyed on the part.

Description

Optical film transport method and transport device

technical field

The present invention relates to a conveying method and a conveying device of an optical film. This application claims priority on the basis of Patent Application No. 2011-124264 filed in Japan on June 2, 2011, and uses the content of this application.

Background technique

Conventionally, optical films such as polarizing films and retardation films bonded to substrates such as liquid crystal panels have been known. As a conveyance method of such an optical film, the conveyance method which cuts the strip-shaped optical film into leaf shape by predetermined length is proposed.

For example, in Patent Document 1, a strip-shaped optical film is cut into leaves of a predetermined length by a cutting part while being conveyed, and the optical film of the leaves intermittently conveyed from the cutting part is passed through a channel connected to the downstream side of the cutting part. The intermittent conveying part and the continuous conveying part carry out conveying.

prior art literature

patent documents

[Patent Document 1] International Publication No. 2010/021026 Pamphlet

Contents of the invention

The technical problem to be solved by the invention

In the conveyance method of the optical film described above, there are two places at the transfer point of the optical film, from the cutting part to the intermittent conveyance part, and from the intermittent conveyance part to the continuous conveyance part. Therefore, if there is a large difference in the conveying speed between the cutting part and the intermittent conveying part or between the intermittent conveying part and the continuous conveying part, when the optical film is handed over, friction will occur on the optical film, which may damage the optical film. quality drops.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an optical film transport method and transport device capable of avoiding friction of the optical film during transport of the optical film and suppressing deterioration of the optical film.

means of solving problems

In order to solve the above-mentioned problems and achieve related objects, the present invention employs the following means.

(1) That is, the optical film conveying method according to the first aspect of the present invention is an optical film conveying method for conveying an optical film, and includes the step of cutting a strip-shaped optical film into a predetermined length on a cutting part. The cutting process of the optical film; the intermittent transport process of intermittently transporting the cut optical film by the intermittent transport unit; the optical film transported from the intermittent transport unit in the a first continuous conveying process of continuously conveying in a plurality of conveying parts connected to the downstream side; In the second continuous conveying process of continuously conveying in the conveying unit, when the optical film is delivered from the intermittent conveying unit to the plurality of conveying units, the second conveying speed is variably controlled so that the first conveying speed The speed is close to the second conveying speed, until the rear end of the cut optical film exceeds the intermittent conveying part, the first conveying speed is to pass through the intermittent conveying part to the plurality of conveying parts The conveying speed of the optical film conveyed, the second conveying speed is the conveying speed of the optical film conveyed on the plurality of conveying units, and the conveying speed of the optical film is delivered from the intermittent conveying unit to the plurality of conveying units. After the optical film is formed, the conveying speed of the optical film is controlled to a third conveying speed which is higher than the optical speed when the optical film is delivered from the intermittent conveying unit to the plurality of conveying units. The transport speed of the film is variably controlled to the third transport speed or the fourth transport speed when the optical film is delivered from the upstream transport unit to the downstream transport unit among the plurality of transport units, so that The third conveying speed is close to the fourth conveying speed, the third conveying speed is a conveying speed for conveying the optical film from the upstream conveying part to the downstream conveying part, and the fourth conveying speed is The speed is the transport speed of the optical film transported on the downstream side transport unit, and when the optical film is delivered from the plurality of transport units to the transport unit, the optical film that has been cut When the rear end exceeds the above-mentioned upstream-side conveyance part, control is performed such that the fifth conveyance speed which is the conveyance speed of the optical film starts to decelerate from the above-mentioned fourth conveyance speed.

(2) The method of transporting the optical film described in (1) above is that, when delivering the optical film from the intermittent transport unit to the plurality of transport units, the intermittent transport in one of the intermittent transport units At the end of the process, the optical film may be sent out such that the rear end of the optical film is separated from the intermittent conveyance unit.

(3) The conveying method of the optical film described in the above (1) or (2) is that when the optical film is transferred from the intermittent conveying unit to the plurality of conveying units, the ratio of the second conveying speed to The ratio of the first transport speed may be 0.8 or more and 1.2 or less.

(4) The conveying method of the optical film described in the above (1) or (2) is that when the optical film is delivered from the upstream conveying unit to the downstream conveying unit, the speed of the third conveying speed is set to The ratio to the fourth transport speed may be 0.8 or more and 1.2 or less.

(5) An optical film conveying device according to a second aspect of the present invention is an optical film conveying device that conveys an optical film, and includes: a supply unit that supplies a belt-shaped optical film; and a belt-shaped optical film supplied from the supply unit. a cutting section for cutting an optical film into a predetermined length; an intermittent conveying section for intermittently conveying the optical film cut into the predetermined length; receiving the optical film conveyed from the intermittent conveying section a plurality of conveyance units that continuously convey without stopping; a conveyance unit that continuously conveys the optical film conveyed from the plurality of conveyance units while receiving it; and a control unit that comprehensively controls the conveyance device , when delivering the optical film from the intermittent conveying unit to the plurality of conveying units connected to the downstream side of the intermittent conveying unit, the control unit variably controls the second conveying speed so that the first The conveying speed is close to the second conveying speed until the rear end of the cut optical film exceeds the intermittent conveying part, and the first conveying speed is to be conveyed to the plurality of conveying parts by the intermittent conveying part The conveying speed of the optical film conveyed by one or more conveying parts, the second conveying speed is the conveying speed of the optical film conveyed on the plurality of conveying parts; After the plurality of conveying units connected to the downstream side deliver the optical film, the control unit controls the conveying speed of the optical film to a third conveying speed, and the third conveying speed is higher than that from the intermittent conveying unit to The conveying speed of the optical film when the plurality of conveying units deliver the optical film, when the optical film is delivered from the upstream conveying unit to the downstream conveying unit among the plural conveying units, the control The third conveying speed or the fourth conveying speed is variably controlled by the section so that the third conveying speed and the fourth conveying speed are close to each other, and the third conveying speed is from the upstream side conveying part to the The transport speed of the optical film transported by the downstream transport unit, the fourth transport speed is the transport speed of the optical film transported by the downstream transport unit, from the plurality of transport units to When the conveyance unit delivers the optical film, when the rear end of the cut optical film exceeds the upstream conveyance unit, the control unit controls the conveyance speed of the optical film to be 5th. The conveying speed is decelerated from the fourth conveying speed.

(6) The conveyance device of the optical film described in said (5) above, when the said control part transfers the said optical film from the said intermittent conveyance part to the said several conveyance part, the said control part controls the said optical film. Sending out of the film is controlled so that the rear end of the optical film is separated from the intermittent conveyance unit at the end of one intermittent conveyance process in the intermittent conveyance unit.

(7) In the optical film conveyance device described in the above (5) or (6), the control unit may control the The ratio of the second transport speed to the first transport speed is 0.8 or more and 1.2 or less.

(8) The optical film conveyance device described in the above (5) or (6), wherein the control unit may control A ratio of the third conveying speed to the fourth conveying speed is 0.8 or more and 1.2 or less.

Invention effect

According to the present invention, friction of the optical film during conveyance of the optical film is avoided, and it is possible to provide an optical film conveyance method and a conveyance device capable of suppressing deterioration of the optical film.

Description of drawings

FIG. 1 is a schematic view showing an optical film transport device according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram showing main parts of the conveying device according to the embodiment.

Fig. 3 is a cross-sectional view showing a main part of a cutting mechanism in the conveying device according to the embodiment.

Fig. 4A is an explanatory view showing the operation of the conveying device according to the embodiment.

Fig. 4B is an explanatory view showing the operation of the transport device following Fig. 4A.

Fig. 4C is an explanatory view showing the operation of the transport device following Fig. 4B.

Fig. 4D is an explanatory view showing the operation of the conveying device following Fig. 4C.

Fig. 4E is an explanatory view showing the operation of the conveying device subsequent to Fig. 4D.

Fig. 5A is an explanatory view showing the operation of the conveying device following Fig. 4E.

Fig. 5B is an explanatory view showing the operation of the conveying device following Fig. 5A.

Fig. 5C is an explanatory view showing the operation of the conveying device following Fig. 5B.

Fig. 5D is an explanatory view showing the operation of the transport device following Fig. 5C.

Fig. 5E is an explanatory view showing the operation of the transport device subsequent to Fig. 5D.

FIG. 6 shows a flowchart of the optical film transport method according to the embodiment.

FIG. 7 shows a flowchart of a method of conveying an optical film subsequent to FIG. 6 .

FIG. 8A is an explanatory view showing the operation of the transport device according to the second embodiment of the present invention.

Fig. 8B is an explanatory view showing the operation of the transport device following Fig. 8A.

Fig. 8C is an explanatory view showing the operation of the conveying device following Fig. 8B.

Fig. 8D is an explanatory view showing the operation of the conveying device following Fig. 8C.

Fig. 8E is an explanatory view showing the operation of the conveying device subsequent to Fig. 8D.

Fig. 9A is an explanatory view showing the operation of the conveying device following Fig. 8E.

Fig. 9B is an explanatory view showing the operation of the conveying device following Fig. 9A.

Fig. 9C is an explanatory view showing the operation of the transport device following Fig. 9B.

Fig. 9D is an explanatory view showing the operation of the conveying device subsequent to Fig. 9C.

Fig. 9E is an explanatory view showing the operation of the conveying device following Fig. 9D.

Fig. 10A is an explanatory view showing the operation of the conveying device following Fig. 9E.

Fig. 10B is an explanatory view showing the operation of the transport device following Fig. 10A.

Detailed ways

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 drawings below, the dimensions, proportions, and the like of each constituent element are suitably different for the sake of easy viewing of the drawings. In addition, in the following description and drawings, the same or corresponding elements are assigned the same symbols, and repeated explanations are omitted.

(first embodiment)

FIG. 1 is a schematic diagram showing an example of an optical film transport device according to a first embodiment of the present invention. FIG. 2 is a schematic diagram showing a main part of an optical film conveyance device according to the present embodiment.

The transport device 1 shown in FIG. 1 transports optical films such as polarizing films and retardation films that are attached to substrates of optical display panels such as liquid crystal panels and organic EL panels, for example. The optical film is not particularly limited as long as it is a flexible belt-shaped functional film, but in this embodiment, a polarizing film will be described as an example.

As shown in Fig. 1 and Fig. 2, the structure of the conveying device 1 includes: a supply unit 2 that sends out the strip-shaped polarizing film F one after another, and a cutting blade that cuts the strip-shaped polarizing film F into predetermined lengths in the conveying direction Mechanism 3 (cutting unit 10), intermittent conveying unit 3A for intermittently conveying polarizing film F cut into a predetermined length, conveying system 4 for continuously conveying polarizing film F conveyed from intermittent conveying portion 3A, conveying The polarizing film F conveyed by the mechanism 4 is carried out to the carry-out mechanism 5 of the next process, and the control part 6 which controls these mechanisms comprehensively. In addition, "conveyance intermittently" means that the conveyance which temporarily stops the polarizing film F is included in the process of conveying the polarizing film F. Moreover, "continuous conveyance" means the conveyance which sends out the polarizing film F continuously without making the polarizing film F stop in the process of conveying the polarizing film F.

The supply part 2 loads the raw material roll 7 of the strip-shaped polarizing film F into the bobbin 8 in the winding state. The bobbin 8 is connected to a driving device such as a motor so as to be rotatable.

A dancer roller D is disposed between the supply unit 2 and the cutting mechanism 3 . While the polarizing film F sucked and held by the sucking table 9 of the cutting mechanism 3 is cut by the laser device (cutting unit) 10 and the sucking and holding is released, the dancer D absorbs the amount of the polarizing film F supplied from the supply unit 2 that is successively sent out. .

Moreover, the some roll which forms the conveyance path of the polarizing film F is arrange|positioned between the supply part 2 and the cutting mechanism 3. In the following description, for any position on the conveyance path, the side closer to the start point (supply unit 2 ) of the conveyance path is referred to as the upstream side, and the side closer to the end point (the delivery mechanism 5 ) of the conveyance path is referred to as the downstream side.

As shown in FIG. 2 , the cutting mechanism 3 includes a suction table 9 for sucking and holding the polarizing film F from the inside, a laser device (cutting unit) 10 that emits laser light that cuts the polarizing film F, and a laser device 10 on the upstream side. A pair of holding rollers 11 and 12 holding the polarizing film F on the downstream side, and a positioning camera 13 for confirming the positioning of the polarizing film F.

In the present embodiment, the cutting mechanism 3 has two sets of laser devices 10 , a pair of grip rollers 11 and 12 , and a positioning camera 13 . That is to say, in the present embodiment, the polarizing film F supplied by the supply part 2 is cut simultaneously at two places at the prescribed cutting action position, so that the blade-shaped polarizing film F is cut into two pieces by one cutting operation, and every two slices together.

FIG. 3 shows a cross-sectional view of the main part of the cutting mechanism 3 . In FIG. 3 , for the sake of convenience, one of the two configurations described above is illustrated.

As shown in FIG. 3 , two holding blocks 9 a and 9 b at the same height on the upper surface of the suction table 9 are closely fixed along the conveyance direction of the polarizing film F. As shown in FIG. That is, the suction groove 14 perpendicular to the conveyance direction of the polarizing film F is formed by the opposing inner side walls of the two holders 9a, 9b. The suction groove 14 serves as a scanning path of laser light emitted from the laser device 10 . In addition, the position where the laser scans (the position where the suction groove 14 is formed) becomes the cutting operation position of the polarizing film F.

The laser device 10 can move horizontally so as to cut the polarizing film F along the suction groove 14 (the direction perpendicular to the transport direction of the polarizing film F).

Grip rollers 11 and 12 are arranged to face each other with polarizing film F interposed therebetween, and are constituted by drive rollers 11a and 12a and elevating rollers 11b and 12b. The grip rollers 11 and 12 are formed by covering the surface of a core material made of metal with an elastic material such as polyurethane (about 30 to 90 hardness). The structure of the holding rolls 11 and 12 is not limited to this, and appropriate combinations, such as metal rolls and rubber rolls, can be used as needed.

Drive rollers 11a and 12a are arranged on the lower surface side of polarizing film F. As shown in FIG. Driving rollers 11a and 12a are connected to driving devices such as motors, and can send out the polarizing film F one after another.

Elevating rollers 11b and 12b are arranged on the upper surface side of polarizing film F. As shown in FIG. The lifting and lowering of the rollers 11b, 12b is carried out by an air cylinder 20 connected by means of a rod 19 to a bracket 18 screwed to the center axis of the rollers. The elevating rollers 11b, 12b are raised and lowered within the range from the upper standby position to the operating position where the polarizing film F is grasped in cooperation with the driving rollers 11a, 12a.

The positioning camera 13 is arranged above the polarizing film F. As shown in FIG. Based on the imaging result of the positioning camera 13, it can be confirmed whether the polarizing film F has been sent to a predetermined cutting action position, etc., and it can be confirmed whether the positioning of the polarizing film F is performed with high precision.

Gripping rollers 11 and 12 function as intermittent conveyance part 3A which conveys the polarizing film F cut|disconnected by predetermined length intermittently to the conveyance mechanism 4 downstream.

As shown in FIGS. 1 and 2 , the conveyance mechanism 4 includes: a first continuous conveyance belt (conveyor) 21 disposed on the downstream side of the intermittent conveyance unit 3A; and a second continuous conveyance belt 21 disposed downstream of the first continuous conveyance belt 21. The conveyor belt (conveying section) 22 is continuously conveyed. The 1st continuous conveyance conveyor belt 21 conveys continuously, receiving the polarizing film F conveyed intermittently from 3 A of intermittent conveyance parts. The 2nd continuous conveyance belt 22 conveys continuously, receiving the polarizing film F sent from the 1st continuous conveyance conveyor 21.

The first continuous conveyor 21 has a first conveyor (conveyor) 21a disposed downstream of the intermittent conveyance 3A, and a second conveyor (conveyor) 21b disposed downstream of the first conveyor 21a.

The first conveyance belt 21a and the second conveyance belt 21b in this embodiment are set to the length which can hold the two sheets of polarizing film F cut by the cutting mechanism 3 and sent out from the intermittent conveyance part 3A at a predetermined pitch.

The carry-out mechanism 5 is composed of a roller conveyor continuously arranged below the terminal end (downstream side) of the conveyance mechanism 4 . The tray 15 which collects the polarizing film F which fell from the conveyance mechanism 4 (2nd continuous conveyance conveyor 22) is arrange|positioned at the head part of the carrying-out mechanism 5.

The control unit 6 controls the sending out of the leaf-shaped polarizing film F so that when the leaf-shaped polarizing film F is handed over from the intermittent conveying portion 3A to the first conveying belt 21a connected to the downstream side of the intermittent conveying portion 3A, , at the point in time when one intermittent conveyance process on the intermittent conveyance part 3A ends, the rear end of the polarizing film F is separated from the intermittent conveyance part 3A. Specifically, the rear end of the cut leaf-shaped polarizing film F is sent out in such a way that it passes over the intermittent conveying part 3A during the next intermittent conveying, and is handed over to the first conveying conveyor connected to the downstream side of the intermittent conveying part 3A. 21a. "Sending over the intermittent conveying part 3A" means that the rear end of the cut leaf-shaped polarizing film F is separated from the intermittent conveying part 3A, that is, the rear end of the cut leaf-shaped polarizing film F is in the same position as the It means that the conveyance roller on the most downstream side of the intermittent conveyance part 3A is separated. Thereby, the polarizing film F after cutting is loaded on the 1st conveyance belt 21a of the downstream side over 3 A of intermittent conveyance parts.

The control part 6 makes the conveyance speed of the polarizing film F on the 1st conveyance belt 21a close to the conveyance speed of the polarizing film F in the intermittent conveyance part 3A, when handing over the polarizing film F from the intermittent conveyance part 3A to the 1st conveyance conveyor 21a.

When the control unit 6 transfers the polarizing film F from the intermittent conveying unit 3A to the first conveying conveyor belt 21a, it is preferable to adjust the conveying speed of the polarizing film F on the first conveying conveyor belt 21a to the conveying speed of the polarizing film F on the intermittent conveying unit 3A. About the same speed. Here, "making it approximately equal" means that the speed at which the polarizing film F is conveyed by the intermittent conveyance unit 3A (drive rollers 11a, 12a) and the speed at which the polarizing film F is conveyed by the first conveyance belt 21a There may be some differences within the range where large friction is not generated on the polarizing film F conveyed across the two. For example, if the ratio V2/V1 of the speed V1 when the polarizing film F is conveyed by the intermittent conveyance unit 3A and the speed V2 when the polarizing film F is conveyed by the first conveyance conveyor 21a is within the range of 0.8/1 to 1.2/1 , the speed of the two can be said to be roughly the same. If it exists in such a range, the friction of the polarizing film F by the conveyance speed difference of the intermittent conveyance part 3A and the 1st conveyance belt 21a can fully be suppressed.

The controller 6 accelerates the polarizing film F delivered to the first conveyor 21a from the intermittent conveyor 3A so that the rear end of the polarizing film is separated from the front end of the next polarizing film F delivered on the first conveyor 21a. That is, the conveying speed of the first conveying conveyor 21a is increased so that after the polarizing film F of the sheet is handed over from the intermittent conveying part 3A to the first conveying conveying belt 21a connected to the downstream side of the intermittent conveying part 3A, The conveyance speed of the leaf-shaped polarizing film F becomes larger than the conveyance speed of the leaf-shaped polarizing film F when the leaf-shaped polarizing film F is delivered to the 1st conveyance belt 21a from 3 A of intermittent conveyance parts. Thereby, on the 1st conveyance conveyor 21a, the two sheets of polarizing film F after cutting and the two sheets of polarizing film F on the intermittent conveyance part 3A handed over next are conveyed with a predetermined pitch.

When the controller 6 transfers the polarizing film F from the first conveying belt 21a to the second conveying belt 21b, it is preferable that the conveying speed of the polarizing film F in the first conveying belt 21a is equal to that of the polarizing film F on the second conveying belt 21b. The conveying speed is roughly the same. Here, "making it substantially coincident" means the same meaning as the above-mentioned V2/V1. If the ratio is not less than 0.8/1 and not more than 1.2/1, the speeds of the two can be said to be approximately the same. And the polarizing film F accelerated on the 1st conveyance conveyor 21a is delivered to the 2nd conveyance conveyor 21b.

The control unit 6 sends out the polarizing film F placed in front of the second conveyor belt 21b delivered from the first conveyor belt 21a with its rear end passing over the second conveyor belt 21b, and delivers it to the second conveyor belt 21b. The second continuous conveying conveyor belt 22 connected to the downstream side. Thereby, the polarizing film F is loaded on the 2nd continuous conveyance belt 22 of a downstream side over the 2nd conveyance conveyor 21b.

When handing over the polarizing film F from the second conveying conveyor 21b to the second continuous conveying conveyor 22, the conveying speed of the polarizing film F on the second conveying conveyor 21b is made close to the conveying speed of the polarizing film F on the second continuous conveying conveyor 22. .

When the controller 6 transfers the polarizing film F from the second conveying conveyor belt 21b to the second continuous conveying conveyor belt 22, it is preferable that the conveying speed of the polarizing film F in the second conveying conveyor belt 21b is the same as that of the polarizing film F in the second continuous conveying conveyor belt 22. The conveying speed is roughly the same. Here, "making it roughly consistent" means: the speed when the polarizing film F is transported at a reduced speed on the second transport conveyor 21b and the speed when the polarizing film F is transported on the second continuous transport conveyor 22 It is possible to make some differences within the range where large friction occurs on the polarizing film F conveyed across between the two. For example, the ratio V3/V2b of the speed V2b when the polarizing film F is conveyed on the second conveying conveyor 21b at a reduced speed and the speed V3 when the polarizing film F is conveyed on the second continuous conveying conveyor 22 is 0.8/1 or more and 1.2/1 or less. Within the range, it can be said that the speed of the two is roughly the same. If it is within this range, the friction of the polarizing film F due to the difference in the conveying speed between the second conveying conveyor 21b and the second continuous conveying conveyor 22 can be sufficiently suppressed.

In this embodiment, the configuration of the control unit 6 includes a computer system. This computer system includes an arithmetic processing unit 6 a such as a CPU, and a storage unit 6 b such as a memory and a hard disk. In addition, the control unit 6 has an interface capable of communicating with an external device of the computer system. An input device capable of inputting an input signal may be connected to the control unit 6 . The input device includes input devices such as a keyboard and a mouse, or a communication device capable of inputting data from an external device of the computer system, and the like. The control unit 6 may include a display device such as a liquid crystal display for displaying the operation status of each part of the conveying device 1, or may be connected to a display device.

The storage part 6b of the control part 6 is installed with the operating system (OS) which controls a computer system. The memory|storage part 6b of the control part 6 records the processing program for conveying the polarizing film F accurately by making each part of the conveyance apparatus 1 execute by making the arithmetic processing part 6a control each part of the conveyance apparatus 1. Various information including programs recorded in the storage unit 6 b can be read by the arithmetic processing unit 6 a of the control unit 6 . The control unit 6 may include a logic circuit such as an ASIC that executes various processes necessary for controlling each part of the conveying device 1 .

In this embodiment, the data (method) at the time of conveyance of the polarizing film F is set in the storage part 6b of the control part 6 in advance. For example, the length of the leaf-shaped polarizing film F is 406.6 mm, and the pitch P (the distance between the rear end of the preceding polarizing film F and the front end of the next continuous polarizing film F during conveyance) is 51.4 mm. The data of is set in the storage general part 6b. In the present embodiment, since the second conveyor belt 21b is activated in such a manner that the polarizing film F is completely mounted on the second continuous conveyor belt 22, the gap between the second conveyor belt 21b and the second continuous conveyor belt 22 is set to Be below the pitch P of the polarizing film F.

4A to 4E and FIGS. 5A to 5E are explanatory diagrams showing the operation of the transport device 1 according to this embodiment. 6 and 7 are flowcharts of a method of transporting a polarizing film according to the present embodiment. Hereinafter, the operation|movement until the belt-shaped polarizing film F is cut and carried out using the conveyance apparatus 1 is demonstrated.

First, the supply part 2 is loaded with the raw material roll 7 of the polarizing film F to be used. After the loading is completed, the operator performs initial setting using the operation panel (step S1 shown in FIG. 6 ). For example, the cutting length, thickness, feeding speed, laser output and focal depth of the polarizing film F, the feeding speed of the driving roller 12a, the feeding speed of the first feeding conveyor 21a, the feeding speed of the second feeding conveyor 21b, and the second feeding speed of the polarizing film F are set. The conveying speed of the continuous conveying conveyor belt 22 and the like.

After the initial setting is completed, the polarizing film F is started to be supplied from the raw material roll 7, and the rotation speed of the drive shaft such as a motor provided on the supply part 2 is detected by a sensor such as a rotary encoder (not shown), and the polarizing film F is fed from the supply part 2. is supplied (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. 4A). When the front end of the polarizing film F reaches the predetermined position K via the grip rollers 11 and 12, the elevating rollers 11b and 12b are activated by the control of the controller 6. Thereby, the polarizing film F is gripped by both sides of the suction table 9 . Specifically, the two rollers 11b, 12b are synchronized with the air cylinder 20 connected thereto, and the two rollers 11b, 12b are simultaneously lowered (see FIG. 4B ).

In addition, under the control of the control unit 6 , in this state, a suction device (not shown) is activated to keep the polarizing film F on the suction table 9 suctioned.

In conjunction with these operations, the dancer roller D is activated under the control of the control unit 6 .

Thereby, the polarizing film F adjusted to be continuously supplied from the supply part 2 is not sent out one after another after the dancer roll D.

Once the polarizing film F is adsorbed and held on the adsorption stage 9, the laser device 10 is activated by the control of the control part 6 (refer FIG. 4C). Thereby, the polarizing film F held by suction on the suction table 9 is cut along the suction groove 14 . As a result, the strip-shaped polarizing film F is cut into leaves of a predetermined length. (step S3 shown in Figure 6).

Once the polarizing film F is cut, the suction of the polarizing film F by the suction table 9 and the gripping of the gripping rollers 11 and 12 are released (see FIG. 4D ). Linkage with this release action, by the control of control part 6, driving roller 11a, 12a, the 1st continuous conveying conveyor belt 21 (the 1st conveying conveyor belt 21a, the 2nd conveying conveyor belt 21b), and the 2nd continuous conveying conveyor belt 22 then start.

The control unit 6 reads the most suitable method from the storage unit 6b based on the initial setting. The control unit 6 controls the driving rollers 11a, 12a and the first conveyor belt 21a according to this method, so that the leaf-shaped polarizing film F intermittently released from the upstream cutting mechanism is relatively positioned on the first conveyor belt. The polarizing film F on 21a is held in a plane at a predetermined pitch.

Simultaneously, the drive rollers 11a, 12a are activated and controlled so that the rear end of the polarizing film F after cutting is sent out over the intermittent conveyance part 3A at the time of the next intermittent conveyance. The intermittent conveyance part 3A (drive roller 11a, 12a) conveys the polarizing film F after cutting to the 1st conveyance conveyor 21a (step S4 shown in FIG. 6).

By the control of the control unit 6, the transport speed of the polarizing film F on the first transport conveyor belt 21a when the polarizing film F is handed over from the intermittent transport unit 3A to the first transport conveyor belt 21a is controlled to be the same as that of the polarizing film F in the intermittent transport unit 3A. The conveying speed is roughly the same. In this embodiment, the speed V1 at which the polarizing film F is transported on the intermittent transport unit 3A is 90 m/min, and the speed V2 at which the polarizing film F is transported on the first transport conveyor 21a is 90 m/min, and the transport speed is controlled. V1 and V2 make them equal to each other.

When handing over the polarizing film F from the intermittent conveyance part 3A to the 1st conveyance conveyor 21a, it is judged whether the rear end of the cut|disconnected polarizing film F passed over the intermittent conveyance part 3A (step S5 shown in FIG. 6). For example, whether the rear end of the cut polarizing film F has passed the intermittent conveyance part 3A is judged based on the schedule previously memorize|stored in the memory|storage part 6b of the control part 6. Specifically, the predetermined length when cutting the polarizing film F, the rotational speed of the driving rollers 11a and 12a in the intermittent conveying part 3A (the conveying speed of the polarizing film F), the intermittent conveying part 3A and the first polarizing film F are set in the initial setting. The distance between conveyor belts 21a. Thereby, it can be judged whether the rear end of the polarizing film F after cutting passed over 3 A of intermittent conveyance parts only by how long polarizing film F was conveyed on 3 A of intermittent conveyance parts.

Then, when it is judged that the rear end of the polarizing film F after cutting has crossed the intermittent conveying part 3A (Yes), the polarizing film F is handed over to the first conveying conveyor belt 21a and the operation is completed (step S6 as shown in FIG. 6 ). ). Thereby, the polarizing film F after cutting is loaded on the 1st conveyance belt 21a of the downstream side over 3 A of intermittent conveyance parts (refer FIG. 4E).

When it is judged that the rear end of the polarizing film F after cutting has not passed over the intermittent conveyance part 3A (NO), until it is judged that the rear end of the cut polarizing film F has passed over the intermittent conveyance part 3A (Yes), the polarizing film F Be continued to convey (step S7 as shown in Figure 6).

After the action of handing over the polarizing film F to the first conveyor belt 21a is completed, the polarizing film F delivered on the first conveyor belt 21a is accelerated under the control of the control unit 6, so that the rear end and the next one are handed over to the first conveyor belt. The front-end|tip of the polarizing film F of the conveyor belt 21a is separated by predetermined pitch P. (Refer to FIG. 5A, step S8 shown in FIG. 7).

In this embodiment, the speed V2a after accelerating the polarizing film F on the first conveying conveyor belt 21a is 103.5 m/min, and it is controlled so that the speed V2a of the polarizing film F after acceleration is higher than that of the polarizing film F on the intermittent conveying part 3A. The speed V1 (90 m/min) at the time of conveying the film F is large (V2a>V1).

Then, by the control of the controller 6, when the polarizing film F is handed over to the second conveying belt 21b from the first conveying conveyor 21a, the conveying speed of the polarizing film F on the first conveying conveyor 21a and the conveying speed of the polarizing film F on the second conveying conveyer 21a are adjusted. The transport speeds of the polarizing film F on 21b are almost the same. Thereby, the polarizing film F accelerated on the 1st conveyance conveyor 21a is delivered to the 2nd conveyance conveyor 21b at a constant speed (103.5m/min).

The polarizing film F after the said acceleration is conveyed by a predetermined distance on the 2nd conveyance conveyor 21b (refer FIG. 5B). Thereafter, under the control of the controller 6, when the polarizing film F is handed over from the second conveying conveyor 21b to the second continuous conveying conveyor 22, the conveying speed of the polarizing film F on the second conveying conveyor 21b is close to that in the second continuous conveying conveyor 22. The transport speed of the polarizing film F. Specifically, after the front end of the polarizing film F accelerated on the second conveying belt 21b reaches the predetermined position K2, according to the control of the control unit 6, the polarizing film F is decelerated on the second conveying belt 21b (see FIG. 5C, as shown in FIG. Step S9 shown in FIG. 7).

Arrival of the leading end of the polarizing film F to the predetermined position K2 can be confirmed by the deceleration sensor 23 arranged above the second conveyance conveyor 21b. When the sensor 23 for deceleration detects the front-end|tip of the polarizing film F after acceleration, the polarizing film F after acceleration is decelerated by the control of the control part 6.

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

By the control of the controller 6, the conveying speed of the polarizing film F on the second conveying conveyor 21b when the polarizing film F is handed over from the second conveying conveyor 21b to the second continuous conveying conveyor 22 and the speed in the second continuous conveying conveyor 22 are controlled. The conveying speed of the polarizing film F was almost the same. Here, "approximately the same" means that the ratio V3/V2b of the conveying speed V2b of the polarizing film F after deceleration on the second conveying conveyor 21b and the speed V3 when the polarizing film F is conveyed by the second continuous conveying conveyor 22 is 0.8 /1 or more and 1.2/1 or less. In this embodiment, the speed V2b after decelerating the polarizing film F on the second conveying conveyor belt 21b is 50 m/min, and the speed V3 when the polarizing film F is conveyed by the second continuous conveying conveyor belt 22 is set to 60 m/min, and the conveying The speeds V2b and V3 are controlled so as to be approximately the same.

At the time of the delivery, it is judged whether or not the rear end of the decelerated polarizing film F has passed over the second transport conveyor 21b (step S11 shown in FIG. 7 ). For example, whether or not the rear end of the decelerated polarizing film F has passed the second conveyor belt 21b can be confirmed by the acceleration sensor 24 arranged above the second conveyor belt 21b. When the sensor 24 for acceleration detects the rear end of the decelerated polarizing film F, the conveyance speed of the 2nd conveyance conveyor 21b is switched by the control of the control part 6.

Once the acceleration sensor 24 detects the rear end of the decelerated polarizing film F, the conveying speed of the second conveying belt 21b is switched from 50 m/min during deceleration to 103.5 m/min during acceleration under the control of the control unit 6 . Thereby, the polarizing film F accelerated by the 1st conveyance conveyor 21a can be smoothly delivered to the 2nd conveyance conveyor 21b.

Then, when it is judged that the rear end of the decelerated polarizing film F has crossed the second conveying conveyor belt 21b (Yes), the polarizing film F is handed over to the second continuous conveying conveyor belt 22 and the action is completed (as shown in FIG. 7 ). Step S12). Thereby, the decelerated polarizing film F is mounted on the downstream 2nd continuous conveyance conveyor 22 over the 2nd conveyance conveyor 21b (refer FIG. 5E).

When it is judged that the rear end of the decelerated polarizing film F has not crossed the second conveyance belt 21b (NO), until it is determined that the rear end of the decelerated polarizing film F has passed the second conveyance conveyor 21b (Yes), the The polarizing film F is continuously conveyed (step S13 shown in FIG. 7).

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

A tray 15 is arranged at the head portion of the carry-out mechanism 5 . Therefore, the polarizing film F dropped from the terminal position of the conveyance mechanism 4 is gradually accommodated in the tray 15 .

The series of operations described above are repeated, and after a predetermined number of polarizing films F are stacked on the tray 15, the tray 15 is retracted to the retracted position. Thereafter, the unloading mechanism 5 is activated, and the laminated polarizing film F is unloaded to the next process.

According to the conveying method and conveying device 1 of the optical film as described above, the polarizing film F sent out intermittently from the cutting mechanism 3, so that the rear end of the polarizing film F after cutting is sent out to cross the interval during the next intermittent conveying. The transfer unit 3A is delivered to the first carrying conveyor belt 21a connected to the downstream side of the intermittent transfer unit 3A. For this reason, it can avoid that the front-end|tip part of the polarizing film F cut|disconnected by the intermittent conveyance part 3A stops in the state which contacted the 1st conveyance belt 21a, and friction arises. In addition, when the polarizing film F is delivered from the intermittent conveying part 3A to the first conveying conveyor 21a, the conveying speed of the polarizing film F on the first conveying conveyor 21a is close to the conveying speed of the polarizing film F on the intermittent conveying part 3A. The handover from the intermittent conveyance part 3A to the 1st conveyance belt 21a is smooth. As a result, the friction of the polarizing film F due to the speed difference between the intermittent conveyance part 3A and the 1st conveyance belt 21a is avoided. And, when the polarizing film F is handed over from the second conveying conveyor belt 21b to the second continuous conveying conveyor belt 22, the transport speed of the polarizing film F on the second conveying conveyor belt 21b and the conveyance of the polarizing film F on the second continuous conveying conveyor belt 22 Since the speeds are close, the transfer from the second conveyance conveyor 21b to the second continuous conveyance conveyor 22 is smooth. As a result, the friction of the polarizing film F due to the speed difference between the second conveying conveyor 21b and the second continuous conveying conveyor 22 is avoided.

Therefore, rubbing of the polarizing film F during conveyance is avoided, and it becomes possible to suppress the deterioration of the polarizing film F.

And, since the speed V1 when the polarizing film F is conveyed by the intermittent conveyance part 3A is controlled to be equal to the speed V2 when the polarizing film F is conveyed by the first conveyance belt 21a, the polarizing film F can be conveyed more smoothly from The intermittent conveyance part 3A is handed over to the 1st conveyance conveyor 21a. Thereby, the friction to the polarizing film F due to the speed difference between the intermittent conveyance part 3A and the 1st conveyance belt 21a is avoided.

In addition, since the speed V2b after decelerating the polarizing film F on the second conveying conveyor 21b is controlled to approximately coincide with the speed V3 when the polarizing film F is conveyed on the second continuous conveying conveyor 22, the polarizing film F can be smoothly conveyed. It is handed over from the second conveyance conveyor 21b to the second continuous conveyance conveyor 22 . Thereby, the friction of the polarizing film F due to the speed difference between the 2nd conveyance belt 21b and the 2nd continuous conveyance belt 22 is avoided.

In addition, since the rear end of the polarizing film F delivered on the first conveyor belt 21a is accelerated so as to be separated from the front end of the polarizing film F delivered next to the first conveyor belt 21a, the cutting mechanism 3 When the cut polarizing film F is sent out to the 1st conveyance conveyor 21a, it can avoid that the polarizing film F of front and back collides.

Moreover, the polarizing film F is accelerated on the 1st conveyance conveyor 21a, and the accelerated polarizing film F is decelerated on the 2nd conveyance conveyor 21b. That is, the conveyance speed of the polarizing film F can be variably controlled independently on the 1st conveyance conveyor 21a and the 2nd conveyance conveyor 21b, respectively. Therefore, variable control of the transport speed of the polarizing film F can be easily realized.

In this embodiment, although the case where the number of sheets of the leaf-shaped polarizing film F cut|disconnected by the cutting mechanism 3 was two sheets was demonstrated as an example, it is not limited to this. For example, the number of leaf-shaped polarizing films F cut by the cutting mechanism 3 may be one or three or more.

In addition, in this Embodiment, although the polarizing film was demonstrated as an example as an optical film, it is not limited to this, It is applicable also to the polarizing film with a spacer.

In addition, in this embodiment, although the structure which has the 1st continuous conveyance conveyor 21, the 1st conveyance conveyor 21a, and the 2nd conveyance conveyor 21b was mentioned and demonstrated, it is not limited to this. For example, it may be a structure provided with only one conveyance belt of the 1st continuous conveyance belt 21, and may be a structure provided with 3 or more conveyance belts.

In addition, in the present embodiment, the structure in which the polarizing film F is accelerated on the first conveyor belt 21a and the accelerated polarizing film F is decelerated on the second conveyor belt 21b has been described as an example, but it is not limited thereto. . For example, the structure which accelerates the polarizing film F on the 1st conveyance conveyor 21a and decelerates the accelerated polarizing film F can also be applied to this invention.

(second embodiment)

FIGS. 8A to 8E , FIGS. 9A to 9E , and FIGS. 10A to 10B are explanatory views showing the operation of the transport device according to the second embodiment of the present invention. Hereinafter, the operation|movement until the belt-shaped polarizing film F is cut|disconnected and carried out using the conveyance apparatus of 2nd Embodiment is demonstrated. The operation of the conveying device of the present embodiment is different from that of the conveying device of the first embodiment in the following points. The number of leaf-shaped polarizing films F loaded on the first conveying belt 21a is one; The polarizing film F is accelerated and the accelerated polarizing film F is decelerated on the 1st conveyance conveyor 21a.

In addition, after loading the raw material roll 7 of the polarizing film F to be used in the supply part 2, since the initial setting process to the conveyance apparatus is the same as that of the said 1st Embodiment, detailed description is abbreviate|omitted.

The polarizing film F supplied from the supply part 2 is conveyed to the cutting mechanism 3 (refer FIG. 8A). The front-end|tip of the polarizing film F reaches predetermined position K by the grip roller 12, and the up-and-down rollers 11b and 12b are activated by the control of the control part 6. Thereby, the polarizing film F is gripped by both sides of the suction table 9 . Specifically, the two rollers 11b, 12b are synchronized with the air cylinder 20 connected thereto, and the two rollers 11b, 12b are simultaneously lowered (see FIG. 8B ).

In addition, according to the state controlled by the control unit 6 , in this state, the suction device (not shown) is activated to keep the polarizing film F adsorbed on the suction table 9 .

In conjunction with these operations, the dancer roller D is activated under the control of the control unit 6 .

Thereby, the polarizing film F adjusted to be continuously supplied from the supply part 2 is not sent out one after another after the dancer D.

Once the polarizing film F is adsorbed and held on the adsorption stage 9, the laser device 10 is activated by the control of the control part 6 (refer FIG. 8C). Thereby, the polarizing film F held by suction on the suction table 9 is cut along the suction groove 14 . As a result, the strip-shaped polarizing film F is cut into predetermined-length leaves (one sheet).

Once the polarizing film F is cut, the suction of the polarizing film F by the suction stage 9 and the gripping of the gripping rollers 11 and 12 are released (see FIG. 8D ). Linkage with this release action, by the control of control part 6, driving roller 11a, 12a, the 1st continuous conveying conveyor belt 21 (the 1st conveying conveyor belt 21a, the 2nd conveying conveyor belt 21b), and the 2nd continuous conveying conveyor belt 22 then start.

The cut|disconnected polarizing film F is loaded on the 1st conveyance belt 21a of the downstream side over 3 A of intermittent conveyance parts (refer FIG. 8E).

When the action of handing over the polarizing film F to the first conveyor belt 21a is completed, the polarizing film F delivered on the first conveyor belt 21a is accelerated under the control of the control unit 6, so that the rear end and the next one are handed over to the first conveyor belt. The front end of the polarizing film F of the conveyor belt 21a is separated by a predetermined pitch P. (Refer to FIG. 9A).

In this embodiment, the speed V2a after accelerating the polarizing film F on the first conveying conveyor belt 21a is 103.5 m/min, and the speed V2a of the polarizing film F after acceleration is controlled to be higher than that of the polarizing film F on the intermittent conveying part 3A. The speed V1 (90 m/min) during F conveying is high (V2a>V1).

The accelerated polarizing film F travels a predetermined distance on the first transport conveyor 21a (see FIG. 9B ). Thereafter, by the control of the controller 6, when the polarizing film F is handed over from the first conveyor belt 21a to the second conveyor belt 21b, the transport speed of the polarizing film F on the first conveyor belt 21a is close to that of the second conveyor belt 21b. The conveying speed of the polarizing film F in. Specifically, when the front end of the accelerated polarizing film F on the first conveyor belt 21a reaches the predetermined position K3, the accelerated polarizing film F is decelerated under the control of the control unit 6 (see FIG. 9C ).

It can be confirmed by the sensor 25 for deceleration arrange|positioned above the 1st conveyance belt 21a that the front-end|tip of the polarizing film F after acceleration has reached predetermined position K3. When the sensor 25 for deceleration detects the front-end|tip of the polarizing film F after acceleration, the polarizing film F after acceleration is decelerated by the control of the control part 6.

By the control of the controller 6, the transport speed of the polarizing film F on the first transport conveyor 21a when the polarizing film F is handed over to the second transport conveyor 21b from the first transport conveyor 21a and the polarizing film F in the second transport conveyor 21b are controlled. The conveying speed of F is roughly the same. Here, "approximately consistent" means that the ratio V5/V4 of the transport speed V4 of the polarizing film F after the first transport conveyor 21a is decelerated and the speed V5 at which the polarizing film F is transported by the second transport conveyor 21b is 0.8/ 1 or more and 1.2/1 or less. In this embodiment, the speed V4 after decelerating the polarizing film F on the first conveying belt 21a is 42m/min, and the speed V5 when the polarizing film F is conveyed by the second conveying conveying belt 21b is 50m/min, and the conveying speed V4 , V5 control into roughly the same.

The decelerated polarizing film F is conveyed to the 2nd conveyance conveyor from the 1st conveyance conveyor 21 (refer FIG. 9D). At this time, whether the rear end of the decelerated polarizing film F has passed over the 1st conveyance conveyor 21a is judged. For example, whether or not the rear end of the decelerated polarizing film F has passed the first conveyor belt 21a can be confirmed by the acceleration sensor 26 arranged above the first conveyor belt 21a. When the sensor 26 for acceleration detects the rear end of the decelerated polarizing film F, the conveyance speed of the 1st conveyance belt 21a is switched by the control of the control part 6.

In this embodiment, the conveyance speed of the 1st conveyance belt 21a is switched from 42 m/min at the time of deceleration to 90 m/min normally. Thereby, it becomes possible to receive the polarizing film F sent out from the intermittent conveyance part 3A smoothly.

Then, when it is judged that the rear end of the decelerated polarizing film F has passed over the first conveyor belt 21a, the operation of delivering the polarizing film F to the second conveyor belt 21b is completed. Thereby, the decelerated polarizing film F is mounted on the downstream 2nd conveyance conveyor 21b over the 1st conveyance conveyor 21a. (Refer to FIG. 9E).

When it is judged that the rear end of the decelerated polarizing film F has not crossed the first conveyor belt 21a, until it is judged that the rear end of the polarized film F after deceleration has crossed the first conveyor belt 21a, the polarizing film F is Continue to deliver.

Once the transfer of the polarizing film F to the second conveyor 21b is completed, the polarizing film F delivered on the second conveyor 21b is conveyed toward the second continuous conveyor 22 (see FIG. 10A ).

According to the control of the controller 6, when the polarizing film F is handed over from the second conveying conveyor belt 21b to the second continuous conveying conveyor belt 22, the transport speed of the polarizing film F on the second conveying conveyor belt 21b and the speed of the polarizing film F on the second continuous conveying conveyor belt 22 are adjusted. The transport speed of the polarizing film F on the top is controlled to be roughly consistent.

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

A tray 15 is arranged at the head portion of the carry-out mechanism 5 . Therefore, the polarizing film F dropped from the terminal position of the conveyance mechanism 4 is gradually accommodated in the tray 15 .

The series of operations described above are repeated, and after a predetermined number of polarizing films F are stacked on the tray 15, the tray 15 is retracted to the retracted position. Thereafter, the unloading mechanism 5 is activated, and the laminated polarizing film F is unloaded to the next process.

According to this embodiment, the friction which generate|occur|produces by the stop of the front-end|tip part of the polarizing film F cut|disconnected by 3 A of intermittent conveyance parts in the state which kept contact with the 1st conveyance belt 21a is avoided. Moreover, when the polarizing film F cut|disconnected by the cutting mechanism 3 is sent out to the 1st conveyance conveyor 21a, it avoids that the polarizing film F of front and rear collides. In addition, friction due to gear shifting (accelerated gear shifting) occurring while the tip portion of the polarizing film F decelerated on the first conveyor belt 21a is kept in contact with the second conveyor belt 21b is avoided. Therefore, it becomes possible to suppress the deterioration of the polarizing film F.

Moreover, the polarizing film F is accelerated on the 1st conveyance conveyor 21a, and the polarizing film F after this acceleration is decelerated. That is, the control which makes the conveyance speed of the polarizing film F variable can be performed only by the 1st conveyance belt 21a. Therefore, the control which makes the conveyance speed of the polarizing film F variable can be realized by simple arrangement|positioning.

As mentioned above, although the example of preferable embodiment concerning this invention was demonstrated referring drawings, it is obvious that this invention is not limited to this example. The above-mentioned example shows an example of various shapes and combinations of the respective structural members, and various changes can be made based on design requirements within the range not departing from the gist of the present invention.

Industrial availability

According to the present invention, it is possible to provide an optical film transportation method and a transportation device capable of avoiding friction of the optical film during transportation of the optical film and suppressing deterioration of the optical film.

Explanation of symbols

1 conveying device

2 supply department

3 cutting mechanism

3A intermittent conveying department

4 conveying mechanism

6 control department

10Laser device (cutting department)

21 The 1st continuous conveying conveyor belt (transporting part)

21a 1st conveying conveyor belt (conveying part)

21b 2nd Conveying Conveyor Belt (Conveying Section)

22 The second continuous conveying conveyor belt (transporting part)

When V1 transfers the optical film from the intermittent conveying unit to the first continuous conveying conveyor, the conveying speed of the optical film in the intermittent conveying unit

V2 Transfer speed of the optical film on the first continuous conveyor belt when the optical film is delivered from the intermittent conveyor section to the first continuous conveyor belt

V2a The transport speed of the optical film after accelerating the polarizing film on the first transport conveyor

When V2b transfers the optical film from the first continuous conveyor belt to the second continuous conveyor belt, the transport speed of the optical film on the first continuous conveyor belt

When V3 transfers the optical film from the first continuous conveying conveyor to the second continuous conveying conveyor, the conveying speed of the optical film on the second continuous conveying conveyor

V4 Transport speed of polarizing film after deceleration on the 1st transport conveyor

V5 is the transport speed when transporting the polarizing film on the second transport conveyor.

Claims (8)

1. A conveying method for an optical film conveying an optical film, characterized in that, comprising the following steps: A cutting process of cutting the strip-shaped optical film into a predetermined length of the optical film on the cutting part; an intermittent conveying process of intermittently conveying the cut optical film by an intermittent conveying unit; a first continuous conveying process of continuously conveying the optical film conveyed from the intermittent conveying unit in a plurality of conveying units connected downstream of the intermittent conveying unit; and a second continuous conveyance process of continuously conveying the optical film conveyed from the plurality of conveyance units in a conveyance unit connected to the downstream side of the plurality of conveyance units without stopping, When transferring the optical film from the intermittent conveying unit to the plurality of conveying units, the second conveying speed is variably controlled so that the first conveying speed and the second conveying speed are close until the optical film is cut. Until the rear end of the optical film exceeds the intermittent conveying unit, the first conveying speed is the conveying speed of the optical film conveyed to the plurality of conveying units by the intermittent conveying unit, and the second conveying speed is The speed is the transport speed of the optical film transported on the plurality of transport parts, After the optical film is delivered from the intermittent conveying unit to the plurality of conveying units, the conveying speed of the optical film is controlled to a third conveying speed, and the third conveying speed is higher than that from the intermittent conveying unit to the plurality of conveying units. the transport speed of the optical film when the plurality of transport units deliver the optical film, In the plurality of conveying units, when the optical film is delivered from the upstream conveying unit to the downstream conveying unit, the third conveying speed or the fourth conveying speed is variably controlled so that the third conveying speed The speed is close to the fourth conveying speed, the third conveying speed is the conveying speed for conveying the optical film from the upstream conveying part to the downstream conveying part, and the fourth conveying speed is at the The transport speed of the optical film transported on the downstream side transport unit, When the optical film is transferred from the plurality of conveying units to the conveying unit, when the rear end of the cut optical film exceeds the upstream conveying unit, control is performed so that the transport of the optical film The 5th conveying speed of speed starts to decelerate from the said 4th conveying speed. 2. The conveying method of the optical film according to claim 1, characterized in that, When transferring the optical film from the intermittent conveyance unit to the plurality of conveyance units, at the end of one of the intermittent conveyance steps in the intermittent conveyance unit, the rear end of the optical film is The optical film is sent out by separating the intermittent conveying section. 3. The conveying method of the optical film according to claim 1 or 2, characterized in that, When transferring the optical film from the intermittent conveyance unit to the plurality of conveyance units, the ratio of the second conveyance speed to the first conveyance speed is set to be 0.8 or more and 1.2 or less. 4. The conveying method of the optical film according to claim 1 or 2, characterized in that, When delivering the optical film from the upstream conveying unit to the downstream conveying unit, the ratio of the third conveying speed to the fourth conveying speed is set to be 0.8 or more and 1.2 or less. 5. A conveying device for an optical film conveying an optical film, characterized in that it has: A supply unit for supplying the strip-shaped optical film; a cutting unit for cutting the strip-shaped optical film supplied from the supply unit into a predetermined length of optical film; an intermittent conveying unit that intermittently conveys the optical film cut into the predetermined length; a plurality of conveying parts that continuously convey the optical film conveyed from the intermittent conveying part while receiving it; a transport unit that continuously transports the optical films transported from the plurality of transport units while receiving them; and a control unit that comprehensively controls the conveying device, When delivering the optical film from the intermittent conveying unit to the plurality of conveying units connected to the downstream side of the intermittent conveying unit, the control unit variably controls the second conveying speed so that the first conveying speed The speed is close to the second conveying speed, until the rear end of the cut optical film exceeds the intermittent conveying part, the first conveying speed is to pass through the intermittent conveying part to the plurality of conveying parts The transport speed of the optical film transported, the second transport speed is the transport speed of the optical film transported on the plurality of transport units; After delivering the optical film from the intermittent conveyance unit to the plurality of conveyance units connected to the downstream side of the intermittent conveyance unit, the control unit controls the conveyance speed of the optical film to a third conveyance speed, The third transport speed is higher than the transport speed of the optical film when the optical film is delivered from the intermittent transport unit to the plurality of transport units, When transferring the optical film from the upstream conveying unit to the downstream conveying unit, the control unit variably controls the third conveying speed or the fourth conveying speed so that the The third conveying speed is close to the fourth conveying speed, the third conveying speed is the conveying speed of the optical film conveyed from the upstream conveying part to the downstream conveying part, and the fourth conveying speed The speed is the transport speed of the optical film transported on the downstream side transport unit, When the optical film is transferred from the plurality of conveying parts to the conveying part, when the rear end of the cut optical film exceeds the upstream conveying part, the control part controls so that as the The fifth conveyance speed of the conveyance speed of the optical film starts to decelerate from the above-mentioned fourth conveyance speed. 6. The conveying device of the optical film according to claim 5, characterized in that, When delivering the optical film from the intermittent conveying unit to the plurality of conveying units, the control unit controls the delivery of the optical film so that one of the intermittent conveying steps in the intermittent conveying unit ends. At a point in time, the rear end of the optical film is separated from the intermittent conveying part. 7. The conveying device of the optical film according to claim 5 or 6, characterized in that, When transferring the optical film from the intermittent conveyance unit to the plurality of conveyance units, the control unit controls the ratio of the second conveyance speed to the first conveyance speed to be 0.8 or more and 1.2 or less. 8. The conveying device for the optical film according to claim 5 or 6, wherein: When delivering the optical film from the upstream conveying unit to the downstream conveying unit, the control unit controls the ratio of the third conveying speed to the fourth conveying speed to be 0.8 or more and 1.2 or less.