KR20170096935A - Apparatus for conveying and recovering optical film, system for manufacturing optical film, and method for conveying and recovering optical film - Google Patents

Abstract

Provided are an apparatus for conveying and recovering an optical film, a system for producing the optical film, and a method of conveying and recovering the optical film, the apparatus, system and method which are capable of automatically recovering the optical film by excellently delaminating the optical film that has been adsorbed onto a conveying sheet by static electricity. The conveying and recovering unit (3) includes a belt conveyor (31), an ionizer (34), and a delamination mechanism (36). The belt conveyor (31) conveys the conveying sheet (20) on a conveying surface (32) in a state that the optical film (30) is adsorbed onto the conveying sheet (20) by static electricity. The ionizer (34) performs the ionization process on the conveying sheet (20) and optical film (30) conveyed by the belt conveyor (31). The delamination mechanism (36) exfoliates the conveying sheet (20) and optical film (30) which have been ionized by the ionizer (34). The ionizer (34) performs the ionization process on the spaced portion of the conveying sheet (20) and the optical film (30) in a state that the conveying sheet (20) is partially spaced from the conveying surface (32).

Description

TECHNICAL FIELD The present invention relates to an optical film transporting and recovering device, an optical film manufacturing system, and an optical film transporting and recovering method. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to an optical film transporting and recovering device and an optical film transporting and recovering device for transporting the transporting sheet on a transporting surface while electrostatically attracting an optical film on a transporting sheet, .

In a display device such as a liquid crystal display device or an organic EL display device, various optical films such as a polarizing plate and a retardation plate are used. In this kind of production process of an optical film, a long web (fabric) in which a plurality of film layers are laminated is formed, and then the web is cut into a desired shape, thereby obtaining a plurality of optical films.

Patent Literature 1 (Japanese Unexamined Patent Application Publication No. 194375/1990) discloses a technique in which a web is cut to obtain an optical film intermediate (hereinafter, simply referred to as "intermediate") and then the intermediate is further cut into a plurality of optical films Chip) is disclosed. More specifically, a plurality of intermediates obtained by cutting the web are fixed to the conveyance sheet (cutting support sheet) by the adhesive tape. Then, a plurality of intermediates are supplied to the cutting apparatus per conveying sheet, whereby a plurality of intermediates are cut on the conveying sheet, and a plurality of optical films are obtained (see paragraphs [0023] to [0038] and Figs. 1 to 4).

When a plurality of optical films thus obtained are recovered as a product, there are a method of picking up an optical film of good products from the conveying sheet and a method of picking up an optical film of a good product from the conveying sheet and an unnecessary material And debris generated at the time of cutting), are considered. However, as a method of removing unnecessary materials, it is difficult to smoothly perform the operation of removing the adhesive tape, and there is a possibility that scratches may be formed on the optical film of good products during the operation. Therefore, it is preferable to clean the conveying sheet by removing unnecessary substances on the conveying sheet after collecting the optical film of the good product from the conveying sheet.

However, it is difficult to automate the work of collecting the optical film of the good product as described above. As a result, it is necessary for a plurality of operators to visually check the optical parts of the optical film, collect only good products, and collect a large number of work sources. Particularly, when the desired optical film is small in size, the number of optical films obtained by cutting the intermediate body is increased, so that it is necessary to arrange more worker. In addition, if the size of a desired optical film is changed, the number of personnel required is also changed, so that it is difficult to adjust personnel.

In addition, also in the cleaning step of the conveying sheet, since the operation of peeling the adhesive tape from the conveying sheet is included, it is difficult to automate the conveying sheet. Further, since the adhesive tape after use is discarded by using the adhesive tape, there is also a problem from the viewpoint of reducing the manufacturing cost.

Further, since only the end portion of the intermediate body is fixed to the transfer sheet by the adhesive tape, after the intermediate body is cut into a plurality of optical films, the optical film can not be fixed on the transfer sheet. Therefore, after cutting the intermediate, it is necessary to carefully move the transfer sheet so that the obtained optical films do not fall, which is one factor for lowering the working efficiency.

In order to solve the problems of the conventional method as described above, the inventors of the present invention have come up with the use of a technique of adsorbing an intermediate to the conveying sheet by electrostatic force. According to this technique, the intermediate member can be fixed on the conveying sheet without using the adhesive tape, and there is an advantage that the obtained optical films can be held on the conveying sheet even after the intermediate member is cut off. As a technique for fixing a film or sheet to a carrier by using static electricity, for example, Patent Document 2 (Japanese Patent Laid-Open Publication No. 2010-18923) and Patent Document 3 (Japanese Patent Laid-Open Publication No. 2006-55970) It is known.

Japanese Patent Laid-Open Publication No. 194375/1991 Japanese Patent Application Laid-Open No. 2010-18923 Japanese Patent Application Laid-Open No. 2006-55970

However, even when attempting automation by using the conventional method using the above-described static electricity, there is a case where a large number of optical films obtained by cutting the intermediate body can not be satisfactorily peeled off from the conveying sheet. Specifically, even if the optical film and the conveying sheet are released, the static electricity can not be sufficiently removed, and when the optical film is automatically peeled from the conveying sheet after that, some of the optical films are not peeled off satisfactorily There were cases where it was not possible to collect it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical film transporting and collecting apparatus, an optical film manufacturing system, and an optical film transporting and collecting method capable of automatically peeling off an optical film adsorbed by static electricity on a transport sheet, The purpose is to provide.

The present inventors have intensively studied and, as a result, have found that, in the case of a configuration in which a conveying sheet is conveyed by using a belt conveyor, and an optical film is peeled from the conveying sheet, defects are liable to occur particularly in peeling of the optical film. It has been considered that the reason why the entire back surface of the conveyance sheet is conveyed in contact with the belt conveyor is one of the reasons that the static electricity can not be sufficiently removed.

(1) The optical film transporting and collecting apparatus according to the present invention comprises a transport mechanism, a static eliminating mechanism, a peeling mechanism, and a film collecting section. The conveying mechanism conveys the conveying sheet on the conveying surface in a state in which the optical film is electrostatically attracted onto the conveying sheet. The charge eliminating mechanism performs charge elimination on the transfer sheet and the optical film conveyed by the conveying mechanism. The peeling mechanism peels off the conveying sheet and the optical film after being discharged by the charge removing mechanism. The film recovery unit recovers the peeled optical film. The charge eliminating mechanism performs charge elimination on the transfer sheet and the optical film in a spaced apart portion of the transfer sheet in a state where a part of the transfer sheet is separated from the transfer surface.

According to this configuration, a space can be formed below the conveying sheet at the spaced apart portion by separating a part of the conveying sheet from the conveying surface. Since static elimination is performed on the conveying sheet and the optical film at the position facing the space, the static electricity can be satisfactorily removed as compared with the case where the entire back surface of the conveying sheet is in contact with the conveying surface. Therefore, if the optical film is peeled off from the conveying sheet after the charge elimination, the optical film adsorbed on the conveying sheet by electrostatic force can be satisfactorily peeled off and recovered automatically.

(2) The optical film carrier recovery device may further include a contact member. The contact member is provided so as to be opposed to the conveying surface and contacts the lower surface of the conveying sheet to support a part of the conveying sheet in a curved state to separate the conveying sheet from the conveying surface. In this case, the charge eliminating mechanism may perform charge elimination to the transfer sheet and the optical film at a portion separated from the transfer surface by the contact member.

According to this configuration, a part of the conveyance sheet can be spaced from the conveying surface by using the contact member provided opposite to the conveying surface. Therefore, a space can be formed below the transport sheet with a relatively simple structure, and the transport sheet and the optical film can be discharged at a position facing the space.

(3) The contact member may be formed by forming a gap in an end edge of the optical film on the conveying sheet by supporting a part of the conveying sheet in a curved state. In this case, the discharge mechanism may perform the discharge toward the gap formed.

According to this configuration, when the conveying sheet passes over the contact member, a part of the conveying sheet is supported in a curved state, so that a gap is formed in the end edge of the optical film on the conveying sheet. Then, a discharge is performed toward the formed gap. As a result, the static electricity can be removed more satisfactorily, so that the optical film can be more satisfactorily peeled off in the subsequent peeling mechanism.

(4) The contact member may have at least a portion which is in contact with the conveyance sheet formed of a conductor.

According to this configuration, since the portion of the contact member which is in contact with the transfer sheet is formed by the conductor, the amount of charge of the transfer sheet through the contact member can be reduced. Therefore, the optical film can be more satisfactorily peeled off in the subsequent peeling mechanism. In addition, since the amount of charge on the conveying sheet is reduced, it is possible to prevent the foreign matter on the conveying surface from adhering to the conveying sheet, thereby preventing the occurrence of defective products due to the inclusion of foreign matter.

(5) The carrying surface may be provided with a concave portion. In this case, the charge eliminating mechanism may perform charge elimination for the transfer sheet and the optical film at positions opposite to the recess.

According to this configuration, the concave portion formed on the conveying surface can be used, and a part of the conveying sheet can be spaced from the conveying surface at a position facing the concave portion. Therefore, a space can be formed below the transport sheet with a relatively simple structure, and the transport sheet and the optical film can be discharged at a position facing the space.

(6) The conveying mechanism may convey the conveying sheet on a plurality of conveying surfaces arranged at intervals. In this case, the charge eliminating mechanism may perform charge elimination to the transfer sheet and the optical film at positions opposed to the gap.

According to this configuration, a gap formed between the plurality of conveying surfaces can be used, and a part of the conveying sheet can be spaced from the conveying surface at a position facing the gap. Therefore, a space can be formed below the transport sheet with a relatively simple structure, and the transport sheet and the optical film can be discharged at a position facing the space.

(7) The optical film carrier collecting device may further include a sheet collecting mechanism for collecting the peeled conveying sheet.

According to this configuration, not only can the optical film be recovered to the film recovery section automatically after peeling the transfer sheet and the optical film in the peeling mechanism, but also the transfer sheet can be automatically recovered by the sheet recovery mechanism. If the recovered transport sheet is reused, the manufacturing cost of the optical film can be reduced.

(8) The sheet collecting mechanism may further comprise: a cleaning unit for cleaning the conveying sheet; a discharger for discharging electricity to the conveying sheet; and a sheet collecting unit for collecting the conveying sheet that has passed through the cleaning unit and the electricity- .

According to this configuration, the peeled conveying sheet is recovered in the sheet collecting portion after being cleaned by the cleaning unit and discharged by electricity. As a result, the recovered conveying sheet can be reused as it is, and the productivity of the optical film is improved.

(9) The optical film production system according to the present invention comprises a charging device, a cutting device, and the optical film carrier recovery device. The charging device charges the transfer sheet and the optical film intermediate to electrostatically adsorb the optical film intermediate on the transfer sheet. The cutting apparatus forms a plurality of optical films by cutting the optical film intermediate on the conveying sheet while the optical film intermediate body is adsorbed on the conveying sheet by electrostatic force. The optical film transporting and recovering apparatus transports a plurality of optical films obtained by the above-described cutting apparatus on the transporting sheet while being adsorbed by the static electricity.

(10) The optical film transporting and collecting method according to the present invention includes a transporting step, a discharging step, a peeling step, and a film recovering step. In the conveying step, the conveying sheet is conveyed on the conveying surface with the optical film being electrostatically adsorbed on the conveying sheet. In the discharging step, electricity is discharged to the conveying sheet and the optical film conveyed by the conveying step. In the peeling step, the conveying sheet and the optical film after being discharged by the discharging step are peeled off. In the film recovery step, the peeled optical film is recovered. In the discharging step, a part of the conveying sheet is spaced apart from the conveying surface, and the conveying sheet and the optical film in the spaced apart portion are discharged.

According to the present invention, the static electricity can be satisfactorily removed as compared with the case where the entire rear surface of the conveyance sheet is in contact with the conveyance surface. Therefore, if the optical film is peeled off from the conveyance sheet after charge elimination, The optical film can be easily peeled off and automatically recovered.

1 is a schematic plan view showing a structural example of an optical film production system according to an embodiment of the present invention.
2 is a schematic plan view of the conveyance recovery device.
3 is a schematic cross-sectional view of the conveyance recovery device.
4 is a cross-sectional view specifically showing a configuration example of the peeling mechanism.
5 is a schematic plan view showing a first modified example of the conveyance recovery device.
6 is a schematic cross-sectional view of the conveyance recovery device of FIG.
7 is a schematic sectional view showing a second modification of the conveyance recovery device.

1. Overall configuration of optical film manufacturing system

1 is a schematic plan view showing a structural example of an optical film production system according to an embodiment of the present invention. This optical film production system is for producing an optical film used in various display devices such as a liquid crystal display device and an organic EL display device. Examples of the optical film to be produced include a polarizing plate or a retardation plate, but the present invention is not limited thereto and includes various other films attached to a display screen of a display device.

As shown in Fig. 1, the optical film production apparatus is provided with a charging device 1, a cutting device 2, a carrier recovery device 3, and the like. In producing an optical film, first, a long web (fabric) in which a plurality of film layers are laminated is prepared. Then, after cutting the web to obtain an intermediate (optical film intermediate) 10, the intermediate film 10 is further cut in the optical film producing apparatus shown in Fig. 1 to obtain a plurality of optical films (optical film chips) 30 ).

The intermediate 10 obtained from the web is sent to the charging device 1. The intermediate body 10 may be inspected by an operator (not shown) in the inspection area before being sent to the charging device 1. The charging apparatus 1 is an apparatus for electrostatically attracting the intermediate body 10 onto the transfer sheet 20. The transfer sheet 20 is formed in a size larger than that of the intermediate body 10 and holds the intermediate body 10 from below in contact with the entire back surface of the intermediate body 10.

As the charging device 1, a known charging device commercially available can be used. The charging device 1 moves from the one end portion to the other end portion of the intermediate body 10 by moving the intermediate body 10 in the state that the transfer sheet 20 holding the intermediate body 10 is placed on the stage 11, And the conveying sheet 20 are charged and fixed with the intermediate body 10 being adsorbed on the conveying sheet 20 by static electricity. The transfer sheet 20 on which the intermediate body 10 is adsorbed in this manner is sent to the cutting apparatus 2 by the worker P1.

The cutting apparatus 2 is for cutting the intermediate body 10 on the conveying sheet 20. As the cutting apparatus 2, for example, a cutting apparatus as disclosed in Japanese Laid-Open Patent Publication No. 2012-194375 can be used. When this type of cutting apparatus is used, a plurality of rectangular optical films (optical film chips) 30 can be formed by cutting the intermediate body 10 at a plurality of points along two orthogonal directions.

As the cutting edge of the cutting apparatus 2, for example, a Thomson blade or the like is used. At the time of cutting the intermediate body 10, the intermediate body 10 is reliably cut by moving the tip of the cutting edge through the intermediate body 10 and moving to the position where it contacts the transfer sheet 20. [ At this time, the conveying sheet 20 functions as a cutting assistant sheet for reliably cutting the intermediate body 10.

The plurality of optical films 30 formed by cutting the intermediate body 10 are sent to the conveyance recovery device 3 by the worker P2 while being held on the conveyance sheet 20. [ The plurality of optical films 30 remain in a state of being attracted to the conveying sheet 20 by static electricity even after cutting so that they do not fall down from the conveying sheet 20 even when moving to the conveying and collecting device 3, The efficiency can be improved.

The transporting and collecting device 3 transports a plurality of optical films 30 obtained by the cutting device 2 on the transporting sheet 20 in a state of being adsorbed by the static electricity and peels off the transporting sheet 20 And is an optical film carrier returning device. The conveying and collecting device 3 is provided with a belt conveyor 31. A plurality of conveying sheets 20 are sequentially conveyed on a conductive conveying surface 32 constituted by the belt conveyor 31 do. In this conveying and collecting device 3, static electricity is released from the conveying sheet 20 and the optical film 30 during the conveyance, and the optical film 30 is removed from the conveying sheet 20, It is possible to easily peel off.

During the transportation by the transporting and collecting device 3, the worker P3 removes the optical film 30, which is a defective product, and debris generated at the time of cutting, from the transporting sheet 20. Since it is constituted by using static electricity, an operation for removing an adhesive tape or the like is unnecessary, and unnecessary substances can be easily removed. Thus, only the good optical film 30 is left on the conveying sheet 20. Then, the transfer sheet 20 and the optical film 30 are peeled off on the downstream side of the conveyance recovery device 3, whereby the optical film 30 of the good product is automatically recovered. The plurality of optical films 30 sequentially recovered are sent to the packaging area 5 by the worker P4. In the packaging area 5, the optical film 30 is packaged as a product by the worker P5.

2. Configuration of the returning device

Fig. 2 is a schematic plan view of the conveyance recovery device 3. Fig. 3 is a schematic cross-sectional view of the carrier recovery device 3. As shown in Fig. The above-described belt conveyor 31 provided in the conveyance recovery device 3 includes a plurality of rollers 311 extending parallel to each other and an endless belt 312 wound around the rollers 311, . This causes the belt 312 to rotate in the counterclockwise direction in Fig. 3 along with the rotation of the plurality of rollers 311 and to move along the upper surface (transport surface 32) of the belt 312 20 are transported.

The belt conveyor 31 constitutes a transport mechanism for transporting the transport sheet 20 on the transport surface 32 while the optical film 30 is adsorbed on the transport sheet 20 by electrostatic force . The conveying sheet 20 is conveyed along the conveying direction D1 orthogonal to the roller 311. [ The belt conveyor 31 is preferably provided so that the conveying surface 32 is horizontal.

The width of the belt 312 in the direction orthogonal to the conveying direction D1 is larger than the width of the conveying sheet 20. It is also possible to convey the transfer sheet 20 in a state in which the back surface (the surface opposite to the optical film 30 side) of the transfer sheet 20 is in contact with the transfer surface 32. However, in the present embodiment, the contact member 33 is provided so as to face the upper side of the carrying surface 32. In the region where the contact member 33 is provided, So that a part of the conveying sheet 20 is spaced apart from the conveying surface 32.

In this embodiment, the contact member 33 is constituted by an elongated rod-shaped member extending in the width direction D2 which is orthogonal to the conveying direction D1, for example. More specifically, the contact member 33 is formed into a cylindrical shape or a cylindrical shape, so that the back surface of the transfer sheet 20 contacting the contact member 33 is smoothly in sliding contact. At least the portion of the contact member 33 which contacts the conveyance sheet 20 is formed by a conductor such as metal and the conductor is grounded.

An electricity eliminator 34 is provided on the downstream side of the contact member 33 in the transport direction D1. The electricity eliminator 34 extends in the width direction D2 and continuously discharges the charge air from a plurality of injection ports 341 formed at regular intervals in the width direction D2. The elimination air is air containing ions generated by, for example, a discharge phenomenon, and is jetted obliquely upward from the upper side toward the downstream side of the contact member 33 in the carrying direction D1 as shown in Fig.

Thereby, the conveying sheet 20 and the optical film 30 which are conveyed on the contact member 33 and downstream to the conveying direction D1 are continuously discharged by the destaticizing air. In other words, the electricity eliminator 34 constitutes a charge eliminating mechanism that performs charge elimination for the transfer sheet 20 and the optical film 30 conveyed by the belt conveyor 31.

3, a part of the conveyance sheet 20 is spaced from the conveying surface 32 immediately downstream of the contact member 33 in the conveying direction D1. Therefore, when the destaticizing air is jetted to the downstream side of the contact member 33 as in the present embodiment, the transfer sheet 20 and the optical film 30 at the portion separated from the conveying surface 32 are subjected to a discharge .

The conveying sheet 20 has flexibility, and a part of the conveying sheet 20 is supported by the contact member 33 in a curved state. The optical film 30 is harder to warp than the conveying sheet 20. 3, when the optical film 30 on the conveying sheet 20 passes over the contact member 33, a gap can be formed in the end edge of the optical film 30 . By discharging the charge air immediately downstream of the contact member 33, the charge can be discharged toward the gap formed by the contact member 33.

A plurality of guide members 35 for guiding the conveying sheet 20 are provided on the upstream side of the conveying direction D1 from the contact member 33 above the conveying surface 32. [ By positioning the side edge portions of the conveyance sheet 20 in contact with these guide members 35, the conveyance sheet 20 can be stably conveyed while the side edge portions are kept parallel to the conveyance direction D1 . In addition, since the relative positions of the transport sheet 20 and the optical film 30 relative to the ejection position of the ejection air from the electricity eliminator 34 can be stabilized, the electric discharge can be performed more satisfactorily.

A peeling mechanism 36 is provided on the downstream side of the belt conveyor 31 in the transport direction D1. The conveying sheet 20 holding the plurality of optical films 30 is conveyed to the downstream side from the conveying surface 32 by the belt conveyor 31 after being discharged by the electricity eliminator 34, And reaches the peeling mechanism 36. The peeling mechanism 36 is a device for peeling off the conveyance sheet 20 and the optical film 30 after the discharge.

Between the belt conveyor 31 and the peeling mechanism 36, there is provided a guide member 360 for covering the gap therebetween. The guide member 360 is formed of, for example, a plate made of stainless steel (SUS), and its surface is embossed.

4 is a cross-sectional view specifically showing a configuration example of the peeling mechanism 36. As shown in Fig. As shown in Fig. 4, the peeling mechanism 36 is provided with a first nip roller pair 361, a second nip roller pair 362, a first passage sensor 365, a second passage sensor 366, A bar 367, a guide member 368, a charge eliminating brush 369, and the like.

The first nip roller pair 361 includes two rollers extending along the width direction D2. The first nip roller pair 361 rotates by driving of a motor not shown and nips the transporting sheet 20 and the optical film 30 supplied from the transporting surface 32 to the peeling mechanism 36, .

The rotation of the first nip roller pair 361 is controlled based on the input signal from the first passage sensor 365. [ The first passage sensor 365 is provided between the belt conveyor 31 and the first nip roller pair 361. As shown in Fig. 4, the first passage sensor 365 may be provided on the guide member 360. Fig.

The first passage sensor 365 includes, for example, a light emitting portion and a light receiving portion (both not shown), and light irradiating the region between the belt conveyor 31 and the first nip roller pair 361 The transport sheet 20 and the optical film 30 that pass through the area of the transport sheet 20 and the optical film 30. [ The rotation of the first nip roller pair 361 is started after a predetermined time from the detection of the leading end of the conveying sheet 20 by the first passage sensor 365 and after the detection of the trailing end of the conveying sheet 20, The conveying sheet 20 and the optical film 30 can be satisfactorily sent to the peeling mechanism 36 by stopping the rotation of the first nip roller pair 361.

The second passage sensor 366 is provided between the first nip roller pair 361 and the second nip roller pair 362. The second passage sensor 366 includes, for example, a light emitting portion and a light receiving portion (both not shown), and irradiates the area between the first nip roller pair 361 and the second nip roller pair 362 On the basis of whether or not the light is blocked by the conveying sheet 20 passing through the area. The conveying sheet 20 and the optical film 30 can be peeled off by operating the peeling bar 367 when the leading edge of the conveying sheet 20 is detected by the second passage sensor 366.

The peeling bar 367 is a plate-like member extending in the width direction D2 and is arranged in parallel with the up-and-down direction, and is displaceable in the up-and-down direction by driving of a cylinder (not shown). The peeling bar 367 is positioned above the nip position of the first nip roller pair 361 as shown by the broken line in Figure 4 until the leading end of the conveying sheet 20 is detected by the second passage sensor 366. [ . When the leading end of the conveying sheet 20 is detected by the second passage sensor 366, the peeling bar 367 is displaced downward and the first nip roller pair 361, as indicated by the solid line in Fig. 4, As shown in Fig.

The optical film 30 is held on the conveying sheet 20 so as not to cover the leading end of the conveying sheet 20. That is, at the tip of the conveying sheet 20, there is an area (the leading end area 21) in which the optical film 30 is not held. Therefore, when the tip of the conveying sheet 20 is detected by the second passage sensor 366, the peeling bar 367 is displaced downward and the leading end region of the conveying sheet 20 at the lower end of the peeling bar 367 Only the conveying sheet 20 is guided downward while the optical film 30 is conveyed along the conveying direction D1 by pushing the conveying sheet 20 downward, The film 30 can be peeled off.

At the lower end of the peeling bar 367, a curved portion 367a is formed. When the leading end region 21 of the conveying sheet 20 is pushed down by the peeling bar 367, the curved portion 367a is brought into contact with the leading end region 21 to prevent the conveying sheet 20 from being scratched . The conveying sheet 20 peeled off from the optical film 30 is guided along a guide member 368 which is smoothly curved and is guided in a predetermined direction and recovered. The guide member 368 is formed of, for example, a plate made of stainless steel (SUS), and its surface is embossed.

The second nip roller pair 362 includes two rollers extending along the width direction D2, like the first nip roller pair 361. The second nip roller pair 362 is rotated by driving of a motor (not shown) to nip the optical film 30 peeled off from the conveying sheet 20 and convey it to the downstream side.

The rotation of the second nip roller pair 362 is controlled based on an input signal from the first passage sensor 365, like the first nip roller pair 361. The rotation of the second nip roller pair 362 may be started or stopped at the same timing as the first nip roller pair 361 or may be started or stopped at a later timing than the first nip roller pair 361 do. However, the first nip roller pair 361 and the second nip roller pair 362 may always rotate, and in this case, the first passage sensor 365 may be omitted.

The discharging brush 369 is provided on the downstream side of the second nip roller pair 362 in the transport direction D1. The antistatic brush 369 is a soft brush that contacts the back surface of each optical film 30 conveyed by the second nip roller pair 362. The static electricity remaining in each optical film 30 can be further removed by contacting the grounded electrification brush 369 continuously with the optical films 30 to be conveyed.

When the optical film 30 on the conveying sheet 20 is all delivered by the second nip roller pair 362 and the optical film 30 is not detected by the second passage sensor 366, Is displaced upward and returned to a state located above the nip position of the first nip roller pair 361 as indicated by the broken line in Fig. Thereafter, when the leading end of the subsequent conveying sheet 20 is detected by the second passage sensor 366, the peeling bar 367 is displaced downward again.

2 and 3, an electric power generator 37 is provided on the downstream side of the optical film 30 in the carrying direction D1 with respect to the peeling mechanism 36. As shown in Fig. The electricity eliminator 37 extends in the width direction D2 and continuously discharges the charge air from a plurality of jetting ports 371 formed at regular intervals in the width direction D2. The elimination air is air containing ions generated by, for example, a discharge phenomenon, and is injected obliquely from above in a direction immediately downstream of the peeling mechanism 36 in the carrying direction D1 as shown in Fig. Thereby, each optical film 30 peeled off from the conveying sheet 20 by the peeling mechanism 36 is continuously discharged by the charge removing air as well as the charge removing brush 369.

Each of the optical films 30 after the elimination in this manner is sequentially dropped onto the film recovery section 38 provided on the downstream side in the carrying direction D1 of the peeling mechanism 36, 38). The film recovery unit 38 is movable and the work P4 moves the film recovery unit 38 to the work table 39 and then the optical film 30 in the stacked state is returned from the film recovery unit 38 It can be taken out. The other film collecting section 40 is provided on the downstream side of the conveying direction D1 of the separating mechanism 36 while the film collecting section 38 is being moved to the work table 39, The optical film 30 can be recovered continuously.

In the vicinity of the workbench 39, there is provided an electric power generator 41 for manually performing a static electricity work by the worker P4. The discharger (41) continuously discharges the discharge air from the jetting port (411). The elimination air is air containing ions generated by, for example, a discharge phenomenon, and is ejected from the upper side toward the work table 39 as shown in Fig. The discharge air jetted from the electric discharge machine 41 has more airflow than the discharge air jetted from the other electric discharge machines 34 and 37. Thereby, the optical film 30 recovered by the working source P4 is exposed to the elimination air ejected from the electricity eliminator 41, thereby performing the final elimination of the optical film 30, It is possible to remove the foreign matter adhering to the surface.

On the lower side of the work table 39, a dust collector 42 is provided. The dust collector 42 sucks the air on the work table 39 and collects foreign matter contained in the air by attaching it to a filter (not shown). Thereby, the foreign object removed from the optical film 30 on the worktable 39 can be recovered by the dust collector 42. [

A sheet collecting section 43 for collecting the conveying sheet 20 peeled off from the optical film 30 is provided below the belt conveyor 31. The conveying sheet 20 peeled off from the optical film 30 by the peeling bar 367 is vertically inverted through the guide member 368 and is then collected in the sheet collecting section 43. A cleaning unit 44 is provided between the guide member 368 and the sheet returning portion 43. [

The cleaning unit 44 includes a plurality of cleaning rollers 441. When the conveying sheet 20 is conveyed to the sheet collecting section 43 side by the cleaning roller 441, its front and back surfaces are cleaned by the outer peripheral surface of the cleaning roller 441.

Between the cleaning roller 441 and the sheet returning portion 43, a pair of upper and lower electric dischargers 45 are provided. Each of the electric generators 45 extends in the width direction D2 and continuously discharges the charge air from a plurality of injection ports 451 formed at regular intervals in the width direction D2. The discharge air is air containing ions generated by, for example, a discharge phenomenon, and is sprayed on the front and back surfaces of the transport sheet 20, which is fed out from the cleaning roller 441 as shown in Fig.

Thereby, the conveying sheet 20 fed out from the cleaning roller 441 is continuously discharged by the discharge air, and is recovered to the sheet collecting portion 43 in a state where the residual static electricity is completely removed. The conveying sheet 20 sequentially falls on the sheet collecting portion 43 and is collected in the sheet collecting portion 43 in a stacked state. The sheet collecting unit 43, the cleaning unit 44 and the electricity removing unit 45 constitute a sheet collecting mechanism for collecting the peeled transfer sheet 20. [ However, the present invention is not limited to the configuration in which the transfer sheet 20 is discharged by the discharge air, and the transfer sheet 20 may be configured to be discharged by using the discharge brush, similarly to the discharge brush 369 for discharging the optical film 30.

The operation of the cleaning unit 44 is controlled based on input signals from the second passage sensor 366 and the third passage sensor 46. [ The third passage sensor 46 is provided between the cleaning unit 44 and the sheet collecting portion 43. The third passage sensor 46 includes, for example, a light emitting portion and a light receiving portion (both not shown), and light irradiating the region between the cleaning unit 44 and the sheet collecting portion 43 The passage of the conveying sheet 20 is detected based on whether or not the conveying sheet 20 is blocked by the conveying sheet 20 passing through the area. The operation of the cleaning unit 44 is started when the leading end of the conveying sheet 20 is detected by the second passage sensor 366 and when the trailing end of the conveying sheet 20 is detected by the third passage sensor 46 Stopped.

3. Action effect

(1) In the present embodiment, as shown in Fig. 3, a part of the conveying sheet 20 is spaced from the conveying surface 32 so that a space 331 ) Can be formed. Since the transfer sheet 20 and the optical film 30 are discharged at a position opposed to the space 331, the entire back surface of the transfer sheet 20 is brought into contact with the transfer surface 32 The static electricity can be satisfactorily removed. Therefore, when the optical film 30 is peeled from the conveying sheet 20 after the elimination, the optical film 30 adsorbed on the conveying sheet 20 by electrostatic force can be satisfactorily peeled off and recovered automatically.

(2) Particularly, in the present embodiment, a part of the conveyance sheet 20 can be spaced from the conveying surface 32 by using the contact member 33 provided opposite to the conveying surface 32. [ A space 331 is formed between the conveying sheet 20 and the conveying surface 32 in a relatively simple configuration and the conveying sheet 20 and the optical film 30 ) Can be performed.

(3) Further, in the present embodiment, when the conveying sheet 20 passes over the contact member 33, a part of the conveying sheet 20 is supported in a curved state so that the end of the optical film 30 on the conveying sheet 20 A gap is formed at the corner. Then, a discharge is performed toward the formed gap. As a result, the static electricity can be removed more satisfactorily, so that the optical film 30 can be more satisfactorily peeled off in the peeling mechanism 36 thereafter.

(4) Further, in the present embodiment, since the portion of the contact member 33 which is in contact with the transfer sheet 20 is formed of a conductor, The charge amount can be lowered. Therefore, the optical film 30 can be more satisfactorily peeled off in the peeling mechanism 36 thereafter. In addition, since the charge amount of the conveyance sheet 20 is reduced, it is possible to prevent the foreign matter on the conveyance surface 32 from adhering to the conveyance sheet 20, thereby preventing the occurrence of defective products due to the inclusion of foreign matter.

(5) In the present embodiment, after the transfer sheet 20 and the optical film 30 are peeled off in the peeling mechanism 36, the optical film 30 is automatically recovered to the film recovery section 40 Not only the sheet conveying section 20 can be automatically recovered by the sheet collecting mechanism (the sheet collecting section 43, the cleaning unit 44, the electricity removing device 45, etc.). By reusing the recovered transfer sheet 20, the manufacturing cost of the optical film 30 can be reduced.

(6) In the present embodiment, the peeled transfer sheet 20 is cleaned by the cleaning unit 44, discharged by the electricity removing unit 45, and then collected in the sheet collecting unit 43. As a result, the recovered transfer sheet 20 can be reused as it is, and the productivity of the optical film 30 is improved.

4. First Modification

5 is a schematic plan view showing a first modification of the conveying and collecting apparatus 3. 6 is a schematic cross-sectional view of the conveyance recovery device 3 of Fig. In the above embodiment, a configuration in which a part of the conveying sheet 20 is separated from the conveying surface 32 by using the contact member 33 has been described. 5 and 6, by changing the configuration of the belt conveyor 51 as the transport mechanism, a part of the transport sheet 20 can be separated from the transport surface 32 have.

The belt conveyor 51 includes a plurality of rollers 511 extending in parallel with each other and an endless belt 512 hung on the rollers 511, for example. In the above embodiment, the entire upper surface (conveying surface 32) of the belt 312 is extended in the horizontal direction. However, in the first modified example, the entire conveying surface 32 is horizontally And the concave portion 513 is formed in a part of the carrying surface 32. [

More specifically, not all of the rollers 511 are arranged at the same height in the horizontal direction, but some rollers 511 are provided at different heights, and the belt 512 is wound around the rollers 511 , And a concave portion 513 is formed on a part of the carrying surface 32. [ By using such a belt conveyor 51, the conveying sheet 20 can be conveyed along the conveying direction D1 so as to extend over the conveying surface 32 formed on both sides of the concave portion 513. [

A guide member 514 is provided between the two conveying surfaces 32 divided by the concave portion 513 to fill the gap therebetween. The guide member 514 is disposed at the same height as the carrying surface 32. The guide member 514 is formed of, for example, a plate made of stainless steel (SUS), and its surface is embossed.

In the concave portion 513, an electricity eliminator 52 is provided. The electricity eliminator 52 extends in the width direction D2 and continuously discharges the deaeration air from a plurality of jetting ports 521 formed at regular intervals in the width direction D2. The discharge air is, for example, air containing ions generated by a discharge phenomenon, and is emitted upward from within the recessed portion 513 as shown in Fig. A plurality of openings 515 are formed in the guide member 514 so that the transport sheet 20 and the optical film 30 transported on the guide member 514 are transported from the electricity supplier 52 to the openings 515 And is discharged continuously by the discharge air jetted through the discharge air. That is, the electricity supplier 52 constitutes a charge eliminating mechanism that performs charge elimination on the transfer sheet 20 and the optical film 30 which are conveyed by the belt conveyor 51.

6, a part of the transfer sheet 20 is separated from the transfer surface 32 on the concave portion 513. Therefore, when ejection air is jetted from the electricity eliminator 52 provided in the concave portion 513, the electricity can be discharged to the conveyance sheet 20 and the optical film 30 at a position opposed to the concave portion 513 .

In this modified example, a part of the conveying sheet 20 is spaced from the conveying surface 32 at a position opposite to the concave portion 513, and a space is formed below the conveying sheet 20 at the spaced apart portion can do. When the entire back surface of the transfer sheet 20 is in contact with the transfer surface 32 because the transfer sheet 20 and the optical film 30 are charged at a position opposite to the transfer sheet 20 The static electricity can be satisfactorily removed. Therefore, when the optical film 30 is peeled from the conveying sheet 20 after the elimination, the optical film 30 adsorbed on the conveying sheet 20 by electrostatic force can be satisfactorily peeled off and recovered automatically.

Particularly, by using the concave portion 513 formed on the conveying surface 32, a part of the conveying sheet 20 can be separated from the conveying surface 32 at a position facing the concave portion 513. [ Therefore, a space can be formed below the conveying sheet 20 in a relatively simple configuration, and the conveying sheet 20 and the optical film 30 can be discharged at a position facing the space.

An electricity eliminator 53 is provided on the downstream side of the concave portion 513 in the transport direction D1. The discharger 53 extends in the width direction D2 and continuously discharges the deaeration air from a plurality of jetting ports 531 formed at regular intervals in the width direction D2. The charge eliminating air is air containing ions generated by, for example, a discharge phenomenon, and is jetted from above with respect to the carry surface 32 as shown in Fig. Therefore, static elimination air can be jetted from the upper side to the optical film 30 on the conveying sheet 20 after passing through the concave portion 513, so that electricity can be discharged continuously.

It is to be noted that the electricity removing unit 53 may be configured to discharge electricity to the transfer sheet 20 and the optical film 30 at that position by jetting the discharge air at a position opposed to the recess 513 from above . The structure of the belt conveyor 51 is not limited to the above-described structure as long as the concave portion 513 is formed on the conveying surface 32. [

5. Second Modification

7 is a schematic sectional view showing a second modification of the conveying and collecting apparatus 3. In the first modification, a configuration in which only one belt conveyor 51 as a transport mechanism is provided has been described. In contrast, in the second modification shown in Fig. 7, two belt conveyors 61 as a transport mechanism are arranged with intervals 60 therebetween.

Each of the belt conveyors 61 includes, for example, two rollers 611 extending in parallel with each other and an endless belt 612 wound around the rollers 611. The two belt conveyors 61 are arranged at the same height in the horizontal direction. The conveying surfaces 32 formed by the upper surfaces of the belts 612 of the respective belt conveyors 61 are arranged in the horizontal direction with the interval 60 therebetween, , The conveying sheet 20 can be conveyed along the conveying direction D1.

A guide member 613 is provided between the two conveying surfaces 32 constituted by the respective belt conveyors 61 to fill the gap 60 therebetween. The guide member 613 is disposed at the same height as the carrying surface 32. The guide member 613 is formed of, for example, a plate made of stainless steel (SUS), and its surface is embossed.

An electricity eliminator 62 is provided below the guide member 613. The electricity supplier 62 extends in the width direction D2 and continuously discharges the deionized air from a plurality of jetting openings 621 formed at regular intervals in the width direction D2. The discharge air is air containing ions generated by, for example, a discharge phenomenon, and is jetted upward from below the guide member 613 as shown in Fig. A plurality of openings (not shown) are formed in the guide member 613. The transport sheet 20 and the optical film 30 transported on the guide member 613 are transported from the electricity supplier 62 through the openings And is continuously discharged by the discharge air jetted. That is, the electricity supplier 62 constitutes a charge eliminating mechanism that performs charge elimination for the transfer sheet 20 and the optical film 30 conveyed by the belt conveyor 61.

7, a part of the conveyance sheet 20 is spaced apart from the conveying surface 32 between the belt conveyors 61. As shown in Fig. The discharge sheet 20 and the optical film 30 can be discharged at a position opposite to the gap 60 by discharging the discharge air from the electricity eliminator 62 provided in the gap 60. [

In this modified example, a part of the conveying sheet 20 is spaced from the conveying surface 32 at a position opposite to the interval 60, and a space is formed below the conveying sheet 20 at the spaced apart portion . When the entire back surface of the transfer sheet 20 is in contact with the transfer surface 32 because the transfer sheet 20 and the optical film 30 are charged at a position opposite to the transfer sheet 20 The static electricity can be satisfactorily removed. Therefore, when the optical film 30 is peeled from the conveying sheet 20 after the elimination, the optical film 30 adsorbed on the conveying sheet 20 by electrostatic force can be satisfactorily peeled off and recovered automatically.

Particularly, by using the interval 60 formed between the plurality of conveying surfaces 32, a part of the conveying sheet 20 can be spaced from the conveying surface 32 at a position opposed to the interval 60 . Therefore, a space can be formed below the conveying sheet 20 in a relatively simple configuration, and the conveying sheet 20 and the optical film 30 can be discharged at a position facing the space.

On the downstream side in the transport direction D1 with respect to the interval 60, an electricity eliminator 63 is provided. The discharger 63 extends in the width direction D2 and continuously discharges the deaeration air from a plurality of jetting ports 631 formed at regular intervals in the width direction D2. The elimination air is air containing ions generated by, for example, a discharge phenomenon, and is ejected from above with respect to the conveying surface 32 as shown in Fig. Therefore, static electricity can be continuously jetted from the upper side of the optical film 30 on the conveying sheet 20 after passing above the gap 60, thereby discharging electricity continuously.

It is to be noted that the eraser 63 may be configured to erase the transfer sheet 20 and the optical film 30 at that position by discharging the eraser air from above at a position opposite to the gap 60. [ In addition, the number of the belt conveyors 61 is not limited to two, but three or more belt conveyors 61 may be provided with an interval 60 therebetween. In this case, electric power may be provided at a position opposite to each interval 60.

6. Other variations

(1) The conveying mechanism for conveying the conveying sheet 20 on the conveying surface 32 is a construction for conveying the conveying sheet 20 in a state in which the optical film 30 is adsorbed on the conveying sheet 20 by the electrostatic force , And the belt conveyors (31, 51, 61).

(2) The electrification mechanism for electrifying the conveyance sheet 20 and the optical film 30 conveyed by the conveying mechanism is limited to the electrifier 34, 52, 53, 62, 63 for ejecting the elimination air It is not. It is possible to perform charge erasure on the transfer sheet 20 and the optical film 30 by using, for example, a charge removing brush or other well-known charge removing mechanism. The eliminators 34, 52, 53, 62, and 63 are not limited to the structure in which a constant amount of the elimination air is always sprayed, Or the injection amount may be controlled according to the amount of charge of the fuel gas.

(3) The peeling mechanism for peeling the conveying sheet 20 and the optical film 30 after they are discharged by the charge eliminating mechanism is not limited to the one having the structure exemplified in Fig. That is, the present invention is not limited to the structure in which the transfer sheet 20 and the optical film 30 are peeled off by pushing down the front end region 21 of the transfer sheet 20 with the peeling bar 367, The transfer sheet 20 and the optical film 30 can be peeled off.

1: charging device
2: Cutting device
3: Return conveying device
4: Inspection area
5: Packaging area
10: Intermediate
11: Loading stand
20: Bounce sheet
30: Optical film
31: Belt conveyor
32: conveying surface
33: contact member
34: My electricity
35: Guide member
36: peeling mechanism
37: My electricity
38: Film recovery unit
39: Workbench
40: Film recovery unit
41: My electricity
42: Dust collector
43: Sheet collection part
44: Cleaning unit
45: My electricity
51: Belt conveyor
52, 53: electrification
60: Interval
61: belt conveyor
62, 63: Electricity posting
331: Space
513:
D1: conveying direction
D2: width direction
P1 to P5: Worker

Claims (17)

A conveying mechanism that conveys the conveying sheet on a conveying surface while electrostatically attracting the optical film on the conveying sheet;
A charge removing mechanism that performs charge removal on the transfer sheet and the optical film carried by the transfer mechanism,
A peeling mechanism for peeling off the conveying sheet and the optical film after being discharged by the charge removing mechanism,
And a film recovery unit for recovering the peeled optical film,
Wherein the static electricity removing mechanism performs the static elimination to the transfer sheet and the optical film in a part where the transfer sheet is separated from the transfer surface. The sheet conveying apparatus according to claim 1, further comprising a contact member which is provided to face the conveying surface and contacts a lower surface of the conveying sheet to support a part of the conveying sheet in a curved state to separate the conveying sheet from the conveying surface,
Wherein said erasing mechanism performs erasing on said conveying sheet and said optical film at a portion spaced from said conveying surface by said contact member. The optical sheet as claimed in claim 2, wherein the contact member supports a part of the conveying sheet in a curved state to form a gap in an end edge of the optical film on the conveying sheet,
Wherein said static eliminating mechanism performs static elimination toward said gap formed. The optical film carrier recycling apparatus according to claim 2, wherein at least a portion of the contact member which is in contact with the transport sheet is formed of a conductor. 2. The apparatus according to claim 1, wherein a concave portion is formed on the conveying surface,
Wherein the static electricity removing mechanism performs an electric discharge with respect to the conveying sheet and the optical film at a position opposite to the concave portion. The conveying apparatus according to claim 1, wherein the conveying mechanism conveys the conveying sheet on a plurality of conveying surfaces arranged at intervals,
Wherein the static electricity removing mechanism performs the static elimination to the conveying sheet and the optical film at a position opposed to the gap. The optical film carrier recovery device according to claim 1, further comprising a sheet recovery mechanism for recovering the peeled transfer sheet. The sheet conveying apparatus according to claim 7, wherein the sheet collecting mechanism includes: a cleaning unit that cleans the conveying sheet; an electricity removing unit that removes electricity from the conveying sheet; And a sheet collecting unit. A charging device for electrostatically adsorbing the optical film intermediate on the conveying sheet by charging the conveying sheet and the optical film intermediate,
A cutting device for forming a plurality of optical films by cutting the optical film intermediate on the conveying sheet while the optical film intermediate is adsorbed on the conveying sheet by electrostatic force;
An optical film delivery device according to claim 1,
Wherein the optical film transporting and recovering device conveys a plurality of optical films obtained by the cutting device on the transporting sheet while being adsorbed by the static electricity. A conveying step of conveying the conveying sheet on a conveying surface while electrostatically attracting the optical film on the conveying sheet;
An erasing step of erasing the conveying sheet and the optical film conveyed by the conveying step,
A peeling step of peeling off the conveying sheet and the optical film after being discharged by the discharging step;
And a film recovering step of recovering the peeled optical film,
Wherein in the neutralization step, electricity is discharged to the transfer sheet and the optical film in a part where the transfer sheet is separated from the transfer surface. The method according to claim 10, wherein, in the discharging step, a contact member provided opposite to the conveying surface contacts a lower surface of the conveying sheet to support a part of the conveying sheet in a curved state to separate the conveying sheet from the conveying surface, Wherein the electrical discharge is performed on the transporting sheet and the optical film at a portion separated from the transporting surface by the contact member. The optical sheet as claimed in claim 11, wherein the contact member supports a part of the conveying sheet in a curved state to form a gap in an end edge of the optical film on the conveying sheet,
Wherein the erasing is performed toward the gap formed in the erasing step. The optical film transporting and recovering method according to claim 11, wherein at least a portion of the contact member which is in contact with the transport sheet is formed of a conductor. 11. The image forming apparatus according to claim 10, wherein a concave portion is formed on the conveying surface,
Wherein in the discharging step, electricity is discharged to the conveying sheet and the optical film at a position opposite to the concave portion. 11. The method according to claim 10, wherein in the conveying step, the conveying sheet is conveyed on a plurality of conveying surfaces arranged at intervals,
Wherein in the discharging step, electricity is discharged to the conveying sheet and the optical film at a position opposite to the gap. The optical film transportation and recovery method according to claim 10, further comprising a sheet collecting step of collecting the peeled transfer sheet. The method according to claim 16, wherein the sheet collecting step includes a cleaning step of cleaning the conveying sheet, and a sheet discharging step of discharging the conveying sheet, wherein after the cleaning step and the sheet discharging step, And the optical film is transported.

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