KR102476511B1 - Marking apparatus, defect inspection system and film manufacturing method - Google Patents

Abstract

[Problem] The present invention is to prevent droplets from adhering to regions other than defective portions of the film, even when droplets are scattered from ejection through an ejection hole to landing on an optical film, thereby improving product yield. It provides a marking device capable of
[Solution] The present invention is a marking device capable of marking information by injecting liquid droplets onto an optical film, comprising: a droplet ejection device having an ejection surface on which an ejection hole for ejecting liquid droplets is formed on an optical film; Provided is a marking device provided with a suction device provided between an optical film and capable of sucking droplets scattered from an ejection hole until they land on the optical film.

Description

Marking device, defect inspection system and film manufacturing method {MARKING APPARATUS, DEFECT INSPECTION SYSTEM AND FILM MANUFACTURING METHOD}

The present invention relates to a marking device, a defect inspection system, and a film manufacturing method.

For example, optical films, such as a polarizing film, are wound around a core material after inspecting defects, such as a foreign material defect and a concavo-convex defect. Information on the position and type of defect (hereinafter referred to as "defect information") is recorded on the optical film by printing a barcode on the edge of the optical film in the width direction or by marking the defective portion. When the amount of the optical film wound around the core material reaches a certain amount, it is cut out from the optical film on the upstream side and shipped as a film roll. In addition, the sheet material (product) can be taken out by cutting out the optical film based on the marking applied to the defective site.

For example, in Patent Literature 1, while detecting partial defects of a sheet product having a certain width and being conveyed in the longitudinal direction perpendicular to the width direction, defect marking that can be scratched for marking to specify the detected defective portion is provided. A device is disclosed. On the other hand, Patent Document 2 exemplifies a non-contact printing method such as inkjet as a marking means.

Patent Document 1: Japanese Unexamined Patent Publication No. 2002-303580 Patent Document 2: Japanese Unexamined Patent Publication No. 2011-102985

The present applicant is also advancing development of a marking device capable of marking information by ejecting liquid droplets to an optical film. This marking device includes a droplet ejection device having an ejection surface on which an ejection hole for ejecting a droplet is formed on an optical film. In such a marking device, in addition to characteristics such as the size and viscosity of droplets ejected from the ejection hole, when the droplet is ejected from the ejection hole and lands on the optical film, depending on the printing object ejected and the transport speed of the optical film, etc. It was clarified by the inventor's examination that the droplets were scattered until the If the scattered droplets adhere to an area other than the defective portion of the optical film, the portion that should be taken out as the original product is contaminated with the droplets, and the contaminated portion may have to be discarded as a defective product, resulting in a decrease in product yield. there was a possibility

The present invention has been made in view of the above circumstances, and even when droplets are scattered from the ejection hole to the point where they land on the optical film, the adhesion of the droplets to areas other than the defective portion of the film is suppressed, and the product is produced. It provides a marking device, a defect inspection system, and a film manufacturing method that can improve the yield of.

In order to achieve the above object, the present invention employs the following means.

(1) A marking device according to one aspect of the present invention is a marking device capable of marking information by ejecting droplets to an optical film, wherein the optical film has an ejection surface on which an ejection hole for ejecting the droplets is formed. and a droplet ejection device provided between the ejection surface and the optical film, and a suction device capable of sucking the splashed droplets after the droplet is ejected from the ejection hole until it lands on the optical film.

(2) In the marking device described in (1) above, the droplets include a first droplet that is scattered when the droplet is ejected from the ejection hole, and a second droplet that is scattered when the droplet lands on the optical film. You may include at least one of

(3) In the marking device described in (1) or (2) above, the suction device is disposed between a first suction mechanism disposed on one side of the ejection passage through which the droplets are ejected, and the ejection passage. You may be provided with at least one of the 2nd suction mechanism arrange|positioned on the other side while leaving it.

(4) In the marking device described in (3) above, the injection passage runs along a direction crossing the vertical direction, the first suction mechanism is disposed above the injection passage in the vertical direction, and the second suction mechanism may be disposed below the ejection passage in the vertical direction.

(5) In the marking device described in (4) above, the suction device may be only the second suction mechanism.

(6) In the marking device according to any one of (1) to (5) above, a shielding member provided on the ejection surface and capable of blocking splashes when the droplets are ejected from the ejection hole is further provided. The shielding member may be formed with an opening that is opened at a position facing the ejection hole and has an inner wall surface for blocking the droplets scattered in a direction intersecting a normal line of the ejection surface.

(7) In the marking device described in (6) above, the diameter of the opening may be larger than the diameter of the injection hole.

(8) In the marking device described in (6) or (7), a tapered portion having an inclined surface facing the ejection hole may be formed at an edge portion of the opening on the ejection surface side.

(9) In the marking device according to any one of (1) to (8) above, it is provided between the emission surface and the optical film, and the droplet is ejected from the ejection hole and then lands on the optical film. A scattering control member capable of blocking scattering of splashes may be further provided, and a blocking surface extending in a direction intersecting a normal line of the ejection surface may be formed on the scattering control member.

(10) In the marking device described in (9) above, the scattering control member may include a scattering control plate having a thickness in a direction parallel to the normal of the ejection surface.

(11) In the marking device described in (10) above, the scattering control plate includes a first scattering control plate disposed on one side with the ejection passage through which the droplets are ejected, and the other end with the ejection passage interposed therebetween. You may provide at least one of the 2nd scattering control plates arrange|positioned in the.

(12) In the marking device described in (11) above, the ejection passage runs along a direction crossing the vertical direction, the first scattering control plate is disposed above the ejection passage in the vertical direction, and the second scattering control plate is disposed above the ejection passage in the vertical direction. The regulating plate may be disposed below the ejection passage in the vertical direction.

(13) In the marking device described in (11) or (12) above, a first blocking surface extending in a direction crossing a normal to the emission surface is formed on the first scattering control plate, and the second scattering control plate is formed. A second blocking surface extending parallel to the first blocking surface may be formed on the plate.

(14) In the marking device according to any one of (11) to (13), even if the separation distance between the first scattering control plate and the second scattering control plate is greater than the diameter of the ejection hole. good night.

(15) In the marking device described in (12) above, only the second scattering control plate may be used as the scattering control plate.

(16) In the marking device according to any one of (1) to (15), the droplet ejection device, while conveying the long strip-shaped optical film, attaches the guide roll to the optical film. They may be disposed facing each other with an optical film interposed therebetween, and the liquid droplets may be ejected from the opposite side of the position of the optical film in contact with the guide roll.

(17) A defect inspection system according to one aspect of the present invention includes a conveyance line for conveying a long strip-shaped film, a defect inspection device for inspecting defects of a film conveyed by the conveyance line, and The marking device according to any one of (1) to (16) above, capable of marking information by injecting a liquid droplet at a location of a defect based thereon.

(18) In the defect inspection system described in (17) above, the marking device may inject the droplet in a direction crossing the vertical direction with respect to the film conveyed in a direction parallel to the vertical direction on the conveying line. .

(19) In the defect inspection system described in (17) above, the marking device may eject the droplets from below to the film conveyed in a direction crossing the vertical direction on the conveyance line.

(20) In the defect inspection system according to any one of (17) to (19) above, a guide roll in contact with the film is further provided, and the marking device operates on the guide roll with the film interposed therebetween. They may be disposed facing each other, and the droplets may be ejected from a side opposite to a position of the film in contact with the guide roll.

(21) In the defect inspection system described in (20) above, the film may be caught on the outer circumferential surface of the guide roll at an angle range of 40° or more and 130° or less.

(22) A film manufacturing apparatus according to one aspect of the present invention includes the defect inspection system according to any one of (17) to (21) above.

(23) A film manufacturing method according to one aspect of the present invention includes a step of marking using the defect inspection system described in any one of (17) to (21) above.

According to the present invention, even when droplets are scattered from the injection hole to the point where they land on the optical film, the attachment of the droplets to areas other than the defective portion of the film can be suppressed to improve product yield. An apparatus, a defect inspection system, and a film manufacturing method can be provided.

1 is a plan view showing an example of a liquid crystal display panel.
FIG. 2 is a II-II sectional view of FIG. 1 .
3 is a cross-sectional view showing an example of an optical film.
Fig. 4 is a side view showing the configuration of the film manufacturing apparatus according to the first embodiment.
5 is a perspective view showing a commercialization process.
Fig. 6 is a perspective view showing a droplet ejection device, a shielding plate, and a fixing member in the marking device according to the first embodiment.
Fig. 7 is a front view showing a droplet ejection device, a shielding plate, and a fixing member in the marking device according to the first embodiment.
FIG. 8 is a VIII-VIII sectional view of FIG. 7 .
Fig. 9 is an enlarged view of main parts of Fig. 8, and is a view for explaining the operation of the shielding plate according to the first embodiment.
Fig. 10 is a view showing a first modified example of the fixing member, and is a sectional view corresponding to Fig. 8;
Fig. 11 is a view showing a second modified example of the fixing member, and is a sectional view corresponding to Fig. 8;
Fig. 12 is a view showing a modified example of the shielding member, and is a sectional view corresponding to Fig. 8;
13 is a perspective view showing the marking device according to the first embodiment.
Fig. 14 is a diagram for explaining the operation of the suction device in the marking device according to the first embodiment.
15 is a perspective view showing a marking device according to a second embodiment.
FIG. 16 includes an enlarged view of main parts of FIG. 15 and is a view for explaining the operation of the scattering control member in the marking device according to the second embodiment.
Fig. 17 is a view showing a marking device according to a third embodiment, and includes a cross section corresponding to Fig. 8;

(First Embodiment)

Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, as a production system of an optical display device, a film manufacturing device constituting a part thereof and a film manufacturing method using the film manufacturing device are described.

A film manufacturing apparatus manufactures a resin-made film optical member (optical film). For example, as an optical film, a polarizing film, a retardation film, and a brightness improvement film etc. are mentioned. For example, optical films are bonded to panel-type optical display components (optical display panels) such as liquid crystal display panels and organic EL display panels. A film manufacturing device constitutes a part of a production system that produces optical display devices including such optical display components and optical members.

In this embodiment, a transmissive liquid crystal display device is exemplified as an optical display device. A transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, an image can be displayed by entering illumination light emitted from a backlight from the rear side of the liquid crystal display panel and emitting light modulated by the liquid crystal display panel from the front side of the liquid crystal display panel.

(optical display device)

First, the configuration of liquid crystal display panel P shown in FIGS. 1 and 2 as an optical display device will be described. 1 is a plan view showing an example of a liquid crystal display panel P. FIG. 2 is a II-II sectional view of FIG. 1 . On the other hand, in FIG. 2, hatching illustration showing a cross section is omitted.

As shown in FIGS. 1 and 2 , the liquid crystal display panel P includes a first substrate P1, a second substrate P2 disposed to face the first substrate P1, and a first substrate ( A liquid crystal layer P3 disposed between P1) and the second substrate P2 is provided.

The first substrate P1 is formed of a transparent substrate having a rectangular shape when viewed in plan. The second substrate P2 is made of a transparent substrate having a relatively smaller rectangular shape than the first substrate P1. The liquid crystal layer P3 seals the periphery between the first substrate P1 and the second substrate P2 with a sealant (not shown), and the inner side of a region surrounded by the sealant and forming a rectangular shape in plan view. is placed on In the liquid crystal display panel P, a region converging inside the outer periphery of the liquid crystal layer P3 in a plan view is referred to as the display region P4, and an outer region surrounding the periphery of the display region P4 is the frame portion. (G).

On the rear surface (backlight side) of the liquid crystal display panel P, a first optical film F11 as a polarizing film and a third optical film F13 as a luminance enhancing film superimposed on the first optical film F11 are sequentially laminated. are joined The 2nd optical film F12 as a polarizing film is bonded to the surface (display surface side) of liquid crystal display panel P. Hereinafter, the film containing any one of the 1st, 2nd, and 3rd optical films F11, F12, and F13 may be generically called optical film F1X.

(optical film)

Next, an example of the optical film F1X shown in FIG. 3 will be described. 3 is a cross-sectional view showing the configuration of the optical sheet F1X. On the other hand, in FIG. 3, illustration of hatching showing a cross section is omitted.

The optical film F1X is obtained by cutting out a sheet piece of a predetermined length from the long strip-shaped optical sheet FX shown in FIG. 3 . Specifically, this optical film F1X is a substrate sheet through a substrate sheet F4, an adhesive layer F5 provided on one side (upper surface in Fig. 3) of the substrate sheet F4, and the adhesive layer F5. It has separator sheet F6 provided on one surface of (F4) and surface protection sheet F7 provided on the other surface (lower surface in FIG. 3) of base material sheet F4.

In the case of a polarizing film, for example, the base sheet F4 has a structure in which a pair of protective films F4b and F4c sandwich the polarizer F4a. The adhesive layer (F5) adheres the substrate sheet (F4) to the liquid crystal display panel (P). The separator sheet F6 protects the adhesive layer F5. Separator sheet F6 is peeled from adhesion layer F5 of optical film F1X before bonding substrate sheet F4 to liquid crystal display panel P via adhesion layer F5. In addition, the part excluding separator sheet F6 from optical film F1X becomes bonding sheet F8.

The surface protection sheet F7 protects the surface of the base sheet F4. The surface protection sheet F7 is peeled from the surface of the base sheet F4 after the base material sheet F4 of the bonding sheet F8 is adhered to the liquid crystal display panel P.

In addition, regarding the base material sheet F4, you may abbreviate any one of a pair of protective films F4b and F4c. For example, the protective film F4b on the side of the adhesion layer F5 may be omitted, and the adhesion layer F5 may be provided directly on the polarizer F4a. Further, surface treatment such as a hard coat treatment for protecting the outermost surface of the liquid crystal display panel P or an antiglare treatment for obtaining an anti-glare effect is applied to the protective film F4c on the side of the surface protection sheet F7. It may be. In addition, regarding the base material sheet F4, it is not limited to what became the above-mentioned laminated structure, and what became a single-layer structure may be sufficient. Also, the surface protection sheet F7 may be omitted.

(Film manufacturing device and film manufacturing method)

Next, the film manufacturing apparatus 1 shown in FIG. 4 is demonstrated. 4 is a side view showing the configuration of the film manufacturing apparatus 1 according to the first embodiment.

For example, the film manufacturing apparatus 1 manufactures the optical film F10X in which the surface protection film was bonded on both surfaces of a polarizing film. The film manufacturing method includes a manufacturing process of the optical film (F10X). For example, the film manufacturing method includes a raw roll manufacturing step of manufacturing a raw roll (not shown) of a long strip of polarizing film, and a long strip of polarizing film by bonding a long strip of surface protection film to the long strip of polarizing film. A bonding process of manufacturing the film roll R1 of the optical film F10X, and a marking process of marking the position of the defect based on the defect inspection result of the long strip-shaped optical film F10X. Further, after the marking process, a commercialization process is performed in which the marked portion is removed as a defective product and the unmarked portion is recovered as a good product.

For example, in the film roll manufacturing process, after performing dyeing treatment, crosslinking treatment, stretching treatment, etc. to a film serving as a base material of a polarizer such as PVA (PolyvinylAlcohol), TAC (Triacetylcellulose) etc. A film roll (not shown) is obtained by bonding a protective film to manufacture a long strip-shaped polarizing film and winding the manufactured polarizing film around a core material.

In the bonding step, the long strip of polarizing film and the long strip of surface protection film are respectively unwound from the original roll of the long strip of polarizing film and the original roll of the long strip of surface protection film (both not shown) while nip Film roll R1 is obtained by manufacturing long strip-shaped optical film (F10X) by pinching and bonding with a roll etc., and winding up the manufactured optical film (F10X) around a core material. For example, PET (Polyethylene terephthalate) is used as a surface protection film.

In the marking process, information is marked on the optical film F10X by injecting ink 4i (droplet) to the position of the defect based on the defect inspection result. "Injection" here means to eject the ink 4i from the ejection hole 21 shown in FIG. 6, for example. In the marking step, the defect portion is directly recorded by printing (marking) a dot-shaped mark larger than the defect on the defect portion of the optical film F10X.

5 is a perspective view showing a commercialization process.

As shown in FIG. 5, in a productization process, a plurality of sheets (products) are obtained from the long strip-shaped optical film F10X. In the vicinity of the defect 11 in the optical film F10X, a dot-shaped mark 12 larger than the defect 11 is printed. In addition, the area|region MA in the optical film F10X is the area|region in which marking (henceforth "full width marking") was given to the whole film width direction. For example, full-width marking is performed when defects frequently occur in a predetermined region of the optical film F10X.

The commercialization process includes a cutting process of cutting the optical film F10X based on the marking information. In a cutting process, a sheet material (product) is taken out by cutting out the optical film F10X based on marking information. In the commercialization process, marked parts are removed as defective products 13, and unmarked parts are recovered as good products 14.

As shown in FIG. 4 , the film manufacturing apparatus 1 includes a conveyance line 9 . The conveyance line 9 forms the conveyance route which conveys the long strip-shaped optical film F10X taken out from film roll R1. The optical film F10X is subjected to predetermined processing such as defect inspection and marking, and is wound around the core as film roll R2 after predetermined processing in the take-up unit 8 .

A pair of nip rolls 5a and 5b are disposed on the conveying line 9 . In addition, an accumulator (not shown) including a plurality of dancer rolls and a guide roll 7 (see FIG. 17 ) may be disposed on the conveyance line 9 .

A pair of nip rolls 5a and 5b rotate in opposite directions to each other while sandwiching the optical film F10X therebetween, thereby optically rotating in the arrow direction V1 shown in FIG. 4 (the transport direction of the optical film F10X). The film (F10X) is taken out.

An accumulator (not shown) is for reducing the fluctuation|variation of the tension|tensile_strength applied to the optical film F10X, while absorbing the difference by the fluctuation|variation of the conveyance amount of the optical film F10X. For example, the accumulator has a structure in which a plurality of dancer rolls located on the upper side and a plurality of dancer rolls located on the lower side are alternately arranged side by side in a predetermined section of the conveyance line 9 .

In the accumulator, the upper dancer roll and the lower dancer roll are moved in a relatively vertical direction while conveying the optical film F10X in a state where the optical film F10X is alternately hung on the upper dancer roll and the lower dancer roll. to operate the lift. Thereby, it becomes possible to accumulate|store the optical film F10X, without stopping the conveyance line 9. For example, in the accumulator, the accumulation of the optical film F10X is increased by widening the distance between the upper and lower dancer rolls, while narrowing the distance between the upper and lower dancer rolls. Accumulation of the optical film F10X can be reduced. The accumulator is operated, for example, during operations such as splicing after exchanging the core materials of the film rolls R1 and R2.

The guide roll 7 (refer FIG. 17) guides the optical film F10X pulled out by nip roll 5a, 5b to the downstream side of the conveyance line 9, rotating. Here, the guide roll 7 is not limited to one, but may be arranged in multiple numbers.

Optical film F10X is sent to the next process, after being wound up on a core material as film roll R2 after a predetermined process in winding-up part 8 (refer FIG. 5).

(defect inspection system)

Next, the defect inspection system 10 provided in the film manufacturing apparatus 1 will be described.

As shown in FIG. 4, the defect inspection system 10 includes a transfer line 9, a defect inspection device 2, a defect information reading device 3, a marking device 4, and a control device 6. do.

The defect inspection apparatus 2 performs a defect inspection of the optical film F10X. Concretely, the defect inspection apparatus 2 detects various defects, such as a foreign material defect, a concavo-convex defect, and a luminous point defect, which occurred when manufacturing the optical film F10X and conveying the optical film F10X. The defect inspection apparatus 2 performs inspection processing such as, for example, reflection inspection, transmission inspection, oblique transmission inspection, orthogonal Nicols transmission inspection, etc. on the optical film F10X conveyed by the conveyance line 9, so that the optical film ( F10X) to detect defects.

For example, the defect inspection apparatus 2 includes a plurality of lighting units (not shown) that irradiates the optical film F10X with illumination light on the upstream side of the nip rolls 5a and 5b in the conveyance line 9, and the optical It has a plurality of photodetectors for detecting light transmitted through the film F10X (transmitted light) or light reflected by the optical film F10X (reflected light).

In the case of a configuration in which the defect inspection apparatus 2 detects transmitted light, a plurality of lighting units and light detection units arranged in parallel in the transport direction of the optical film F10X are disposed facing each other with the optical film F10X interposed therebetween. In addition, the defect inspection apparatus 2 is not limited to a configuration for detecting transmitted light, and may have a configuration for detecting reflected light or a configuration for detecting transmitted light and reflected light. In the case of detecting the reflected light, the light detection unit may be disposed on the side of the lighting unit.

The lighting unit irradiates the optical film F10X with illumination light having the light intensity, wavelength, polarization state, and the like adjusted according to the type of defect inspection. The light detection unit captures an image of a position where the illumination light of the optical film F10X is irradiated using an imaging element such as a CCD. An image picked up by the photodetector (defect inspection result) is output to the control device 6.

In addition, a defect inspection device for inspecting defects of a long strip-shaped polarizing film before the long strip-shaped optical film and the long strip-shaped surface protection film are bonded together, and defect information based on the defect inspection results of the defect inspection device described above. You may further include a recording device (not shown) for recording on the polarizing film. A defect inspection device not shown has the same configuration as the defect inspection device 2 described above, and detects defects in the polarizing film.

The defect information recorded by the recording device (not shown) includes information about the location or type of the defect, and is, for example, an identification code such as a character, barcode, or two-dimensional code (DataMatrix code, QR code (registered trademark), etc.) It is recorded. The identification code includes, for example, information (information on the defect position) indicating how far apart a defect detected by a defect inspection device (not shown) exists along the film width direction from the location where the identification code was printed. In addition, the identification code may contain information regarding the type of detected defect.

The recording device is installed on the downstream side of the defect inspection device (not shown) in the conveying line of the polarizing film. The recording device has, for example, a printing head employing an inkjet method. This printing head prints the defect information by ejecting ink to a position along the edge (end) of the polarizing film in the width direction.

The defect information reading device 3 is installed on the downstream side of the defect inspection device 2 in the conveying line 9 . The defect information reading device 3 reads the defect information recorded on the optical film F10X (the polarizing film). The defect information reading device 3 has an imaging device. An imaging device images the defect information of the conveyed optical film F10X using imaging elements, such as CCD.

The defect information reading device 3 includes information about the location or type of defect, and is recorded as an identification code such as a character, barcode, two-dimensional code (DataMatrix code, QR code (registered trademark), etc.), for example. read For example, by reading the defect information, information indicating how far the defect detected by the defect inspection device 2 or the like exists along the film width direction from the location where the identification code was printed (information on the location of the defect) is obtained. You can get it. Further, when the identification code includes information on the type of detected defect, information on the type of detected defect can be obtained by reading the defect information. The defect information (read result) obtained by the defect information reading device 3 is output to the control device 6 .

The marking device 4 is installed on the downstream side of the defect information reading device 3 in the conveying line 9 . The marking device 4 marks information on the optical film F10X by injecting the ink 4i to the position of the defect based on the defect inspection result. The marking device 4 directly records on the defect site by printing (marking) a dot-shaped mark larger than the defect on the defect site of the optical film F10X.

Alternatively, the marking device 4 may directly record on the defective portion by printing (marking) a dot-shaped, line-shaped, or frame-shaped mark having a size including the defect. At this time, other than the mark, information on the type of defect may be recorded by printing a symbol or pattern representing the type of defect on the defect site.

The defect inspection system 10 may be equipped with a measuring instrument (not shown) which measures the conveyance amount of the optical film F10X. For example, as a length measuring machine, you may arrange|position an angular position sensor, such as a rotary encoder, in the nip roll in the conveyance line 9. The length measuring machine measures the conveyance amount of the optical film F10X according to the amount of rotational displacement of the nip roll which rotates in contact with the optical film F10X. The measuring result of the measuring instrument is output to the control device 6.

The control device 6 controls each part of the film manufacturing device 1 collectively. Specifically, this control device 6 has a computer system as an electronic control device. A computer system includes an arithmetic processing unit such as a CPU and an information storage unit such as a memory or a hard disk.

In the information storage unit of the control device 6, an operating system (OS) for controlling the computer system and a program for executing various processes in each unit of the film manufacturing apparatus 1 are recorded in the arithmetic processing unit. Furthermore, the control device 6 may include a logic circuit such as an ASIC that performs various processes necessary for controlling each part of the film manufacturing device 1 . In addition, the control device 6 includes an interface for inputting/outputting with an external device of the computer system. An input device such as a keyboard or mouse, a display device such as a liquid crystal display, a communication device, and the like can be connected to this interface, for example.

The control device 6 analyzes the image captured by the photodetection unit of the defect inspection device to determine the presence (position) or type of a defect. When determining that the polarizing film has a defect, the control device 6 controls the recording device to record defect information in the polarizing film. The control device 6 controls the marking device 4 when determining that a defect exists in the optical film F10X based on the inspection result of the defect inspection device and the reading result of the defect information reading device 3, etc. A mark is printed on the optical film (F10X).

(Marking device)

Next, the marking device 4 included in the defect inspection system 10 will be described.

As shown in Fig. 13, the marking device 4 includes a droplet ejection device 20, a shielding plate 30 (shielding member), a fixing member 40, and a suction device 50. First, in the following description, among the components of the marking device 4, the droplet ejection device 20, the shielding plate 30, and the fixing member 40 excluding the suction device 50 will be described.

Fig. 6 is a perspective view showing the droplet ejection device 20, the shielding plate 30, and the fixing member 40 in the marking device 4 according to the first embodiment.

As shown in FIG. 6 , the marking device 4 includes a droplet ejection device 20 , a shielding plate 30 and a fixing member 40 . The marking device 4 prints a dot-shaped mark 12 larger than the defect on the defective site of the optical film F10X by injecting the ink 4i onto the optical film F10X.

In the following description, an xyz orthogonal coordinate system is set as needed, and the positional relationship of each member is demonstrated referring to this xyz orthogonal coordinate system. In this embodiment, the normal direction of the ejection surface 22 of the droplet ejection device 20 is the x direction, and the direction orthogonal to the x direction within the surface of the ejection surface 22 (the width of the ejection surface 22) direction) as the y direction, the x direction, and the direction orthogonal to the y direction as the z direction. Here, the x direction and the y direction are in the horizontal plane, and the z direction is in the vertical direction (vertical direction). In some cases, the x direction is referred to as the front-back direction, and the y-direction is referred to as the left-right direction. In some cases, the +x direction is referred to as the forward direction, the -x direction as the backward direction, the +y direction as the left direction, the -y direction as the right direction, the +z direction as the upward direction, and the -z direction as the downward direction.

As shown in FIG. 6 , the marking device 4 is horizontally orthogonal to the vertical direction with respect to the optical film F10X conveyed in the direction V1 (upper side) parallel to the vertical direction by the conveyance line 9 The ink 4i is ejected in the direction. For example, the conveyance speed (hereinafter referred to as "line speed") of the optical film F10X is a value of 50 m/min or less as a range capable of printing the mark 12 on the optical film F10X. In this embodiment, the line speed is set to a value of 30 m/min or less.

7 is a front view showing the droplet ejection device 20, the shielding plate 30, and the fixing member 40 in the marking device 4 according to the first embodiment. FIG. 8 is a VIII-VIII sectional view of FIG. 7 . FIG. 9 is an enlarged view of a main part of FIG. 8 and is a view for explaining the operation of the shielding plate 30 according to the first embodiment. Meanwhile, in FIG. 9 , illustration of the fixing member 40 is omitted for convenience.

As shown in Fig. 7, the droplet ejection device 20 includes a plurality of ejection heads 20A capable of ejecting ink. Although FIG. 7 shows three ejection heads 20A as an example, the number of ejection heads 20A is not limited to this, and can be appropriately set as needed, such as one, two, or four or more. . The ejection head 20A has a rectangular parallelepiped shape with a long length in the y direction. The emitting surface 22 (see Fig. 8) of the ejection head 20A forms a rectangle with a long length in the y direction when viewed from the front in Fig. 7 .

A plurality of shielding plates 30 are provided for each of the plurality of ejection heads 20A. 7 shows, as an example, three shielding plates 30 provided for each of the three ejection heads 20A, but the number of shielding plates 30 is not limited to this, according to the number of ejection heads 20A. It can be set, and it can be set as appropriate, such as 1, 2, or 4 or more. The surface 32 of the shield plate 30 opposite to the emitting surface 22 (hereinafter referred to as "the first main surface") has a rectangle of substantially the same size as the emitting surface 22 when viewed from the front in FIG. 7 . achieve

A plurality of fixing members 40 are provided to fix the shielding plate 30 to each of the plurality of ejection heads 20A. 7 shows, as an example, three fixing members 40 provided to fix the shield plate 30 to each of the three ejection heads 20A, but the number of fixing members 40 is not limited to this. , It can be set according to the number of the injection head 20A and the shielding plate 30, and can be set as appropriate, such as 1, 2, or 4 or more. The fixing member 40 has a rectangular frame shape following the outer shape of the first main surface 32 of the shield plate 30 when viewed from the front in FIG. 7 .

For example, the ejection head 20A employs a valve-type inkjet head. For example, the amount of ink ejected from the ejection hole 21 of the ejection head 20A (hereinafter referred to as “droplet amount”) is the diameter of the dot-shaped mark 12 printed on the optical film F10X (hereinafter referred to as “droplet amount”). referred to as "dot diameter") to be a value in the range of 1 mm or more and 10 mm or less, it is set to a value in the range of 0.05 µL or more and 0.2 µL or less. In this embodiment, the droplet amount is about 0.166 µL.

For example, the viscosity of the ink ejected from the ejection hole 21 of the ejection head 20A (hereinafter referred to as “ink viscosity”) is 0.05 × 10 so that the dot diameter is within a range of 1 mm or more and 10 mm or less. It is a value within the range of ^-3 Pa·s or more and 1.00×10 ^-3 Pa·s or less. In this embodiment, the ink viscosity is 0.89×10 ^-3 Pa·s.

For example, the ejection speed of the ink from the ejection head 20A (hereinafter referred to as "ink ejection speed") is a printable range of 1 m/s or more and 10 m/s or less, preferably 4 m/s. s or more and 5 m/s or less. In this embodiment, the ink ejection speed is about 4.2 m/s. By setting the ink ejection speed within the above range, printing can be performed with high accuracy in the target printing area of the optical film F10 during transport, and droplets at the time of ink impact (eg, second droplets 4b shown in FIG. 14 ) can suppress the occurrence of Here, "ink impact" shows that the injected ink 4i contacts the optical film F10X, and becomes a printing on the optical film F10X, collapsing the shape of the ink 4i.

For example, the opening time of the ejection hole 21 of the ejection head 20A is a value in the range of 0.5 ms or more, preferably 0.8 ms or more and 1.5 ms as the range in which the mark 12 can be printed on the optical film F10X. It is set as the value in the following range, more preferably in the range of 0.9 ms or more and 1.2 ms or less. In this embodiment, the aperture time is about 1.0 ms. By setting the aperture time within the above range, the amount of ejected ink can be stabilized to achieve a target dot diameter, and generation of droplets 4a can be suppressed during ink ejection.

For example, the ink ejection pressure from the ejection head 20A (hereinafter referred to as "ink ejection pressure") is a range of 0.030 MPa or less as a range capable of printing the mark 12 on the optical film F10X, preferably. Preferably, it is a value in the range of 0.020 MPa or more and 0.028 MPa or less. In this embodiment, the ink ejection pressure is about 0.025 MPa. By setting the ink ejection pressure within the above range, the ink ejection speed can be stabilized, and generation of droplets 4a at the time of ink ejection and droplets at the time of ink impact (for example, second droplets 4b shown in FIG. 14 ) can be suppressed. have.

For example, the distance K1 (see FIG. 9 ) between the ejection hole 21 of the ejection head 20A and the optical film F10X is 50 as a range in which the mark 12 can be printed on the optical film F10X. A value of mm or less, preferably a value of 5 mm or more and 15 mm or less. The reason for this is that if the distance K1 is too small, the ejection head 20A may come into contact with the optical film F10X, and if the distance K1 is too large, ink will scatter when ejected from the ejection hole 21 This is because droplets can spread widely. In this embodiment, the distance K1 is about 13 mm. In addition, the distance K1 is the distance between the center of the ejection hole 21 on the ejection surface 22 and the printing surface (the surface on the -x direction side) of the optical film F10X in the direction normal to the ejection surface 22. It is the length of the connected line segments. The distance between the ejection hole 21 of the ejection head 20A and the optical film F10X corresponds to the distance between the ejection surface 22 of the ejection head 20A and the optical film F10X.

For example, the wind speed around the optical film F10X generated by conveyance of the optical film F10X is a value in the range of 0.5 m/s or less as a range capable of printing the mark 12 on the optical film F10X, preferably. Preferably, it is a value within the range of 0.2 m/s or less. In this embodiment, the wind speed is set to about 0.1 m/s under the condition of a line speed of about 25 m/min. When the wind speed is within the above range, it is possible to suppress the wide spread of the generated droplets 4a and 4b.

A plurality of ejection holes 21 through which ink is ejected onto the optical film F10X are formed on the ejection surface 22 of the ejection head 20A (droplet ejection device 20). The plurality of ejection holes 21 are arranged side by side in the width direction (y direction) of the emission surface 22 at the center of the emission surface 22 in the vertical direction (z direction). Although FIG. 7 shows 9 ejection holes 21 per one emitting surface 22 as an example, 16 ejection holes 21 are formed per one emitting surface 22 in this embodiment. In addition, the number of ejection holes 21 is not limited to this, and can be appropriately set as necessary, such as a number of 8 or less or 10 or more. In addition, the row of ejection holes 21 is not limited to one row, but can be appropriately set as necessary, such as two or more rows. The ejection hole 21 forms a circle when viewed from the front in FIG. 7 .

As shown in FIG. 8 , the shielding plate 30 is provided on the emitting surface 22 . As shown in FIG. 9 , the shield plate 30 has a thickness t1 in a direction (x direction) parallel to the normal to the emitting surface 22 . For example, the thickness t1 of the shielding plate 30 is preferably a value in the range of 2 mm or more and 10 mm or less, more preferably a value in the range of 2 mm or more and 5 mm or less. In this embodiment, the thickness t1 of the shielding plate 30 is about 3 mm. In addition, you may make the thickness t1 of the shielding plate 30 as large as possible within the range where the shielding plate 30 does not touch optical film F10X.

The shielding plate 30 can block splashes 4a scattered when the ink 4i is ejected from the injection hole 21 . An opening 31 opened at a position facing the injection hole 21 is formed in the shielding plate 30 . The opening 31 has an inner wall surface 31a facing the injection passage Ia through which the ink 4i is injected. The inner wall surface 31a of the opening 31 has a cylindrical shape with the injection passage Ia as a central axis. When the ink 4i is ejected from the ejection hole 21, the inner wall surface 31a of the opening 31 blocks the splashing droplets 4a in a direction crossing the normal line of the ejection surface 22. At least a part of the scattered droplets 4a adheres to the inner wall surface 31a of the opening 31 .

As shown in FIG. 7 , a plurality of openings 31 are provided for every plurality of ejection holes 21 . The plurality of openings 31 are arranged side by side in the width direction (y direction) of the first main surface 32 at the center of the first main surface 32 in the vertical direction (z direction). Although FIG. 7 shows 9 openings 31 per one shielding plate 30 as an example, in this embodiment, 16 openings 31 are provided according to 16 ejection holes 21 per one shielding plate 30. ) is provided. In addition, the number of openings 31 is not limited to this, and can be appropriately set as necessary, such as a number of 8 or less or 10 or more. In addition, the number of rows of openings 31 is not limited to one row, but can be appropriately set as necessary, such as two or more rows. The opening 31 forms a circle when viewed from the front in FIG. 7 .

As shown in Fig. 9, the diameter d1 of the opening 31 is larger than the diameter d2 of the injection hole 21 (d1 > d2). For example, the ratio (d1/d2) of the diameter d1 of the opening 31 and the diameter d2 of the injection hole 21 is preferably in the range of 1.5 or more and 5 or less, more preferably in the range of 2 or more and 4 or less. to the value of In this embodiment, the ratio (d1/d2) is about 3, the diameter d1 of the opening 31 is about 3 mm, and the diameter d2 of the ejection hole 21 is about 1 mm. Also, the diameter d2 of the injection hole 21 may be set to a value in the range of 0.1 mm or more and 2 mm or less.

The first main surface 32 of the shielding plate 30 is separated from the optical film F10X. For example, the distance L1 between the first main surface 32 of the shielding plate 30 and the optical film F10X is preferably 10 mm or less, more preferably 5 mm or less. In this embodiment, the distance L1 is about 10 mm. Further, the distance L1 may be made as small as possible within a range in which the shielding plate 30 does not come into contact with the optical film F10X.

The shielding plate 30 abuts against the emitting surface 22 . In other words, the surface 35 on the side of the emission surface 22 of the shielding plate 30 (hereinafter referred to as "the second main surface") is disposed on the same plane as the emission surface 22 .

For example, the shielding plate 30 is formed of a metal plate such as SUS or a plastic plate such as an acrylic plate and a polypropylene plate (PP plate). In this embodiment, the shielding plate 30 is formed of an acrylic plate. Alternatively, the shielding plate 30 may be formed of a plate material that does not react with ink. Accordingly, since corrosion of the shielding plate 30 by ink can be suppressed, the corrosion resistance of the shielding plate 30 can be improved.

The fixing member 40 fixes the shield plate 30 to the ejection head 20A. As shown in FIG. 8 , the fixing member 40 includes a first wall portion 41 and a second wall portion 42 . For example, the fixing member 40 is formed of a metal plate such as SUS.

The first wall portion 41 covers side ends 23 and 33 located in a direction orthogonal to the normal to the ejection surface 22 in both the ejection head 20A and the shielding plate 30 . The first wall portion 41 has a rectangular tubular shape extending in the front-back direction (x direction). The first wall portion 41 is formed between the portion on the side of the emission surface 22 in the side end portion 23 in the vertical direction (z direction) and the width direction (y direction) of the injection head 20A and the shield plate 30. It abuts on both the side end part 33 in the vertical direction (z direction) and the width direction (y direction). For example, the first wall portion 41 is fastened to the injection head 20A by fastening members such as bolts. Accordingly, the relative movement of the injection head 20A and the shielding plate 30 in the vertical direction (z direction) and width direction (y direction) is restricted.

The second wall portion 42 covers the outer periphery 34 of the outer periphery of the opening 31 in the first main surface 32 of the shielding plate 30 . The second wall portion 42 forms a rectangular frame shape extending from the front end (+x direction end) of the first wall portion 41 toward the inside in the z direction. The second wall portion 42 abuts against the outer periphery 34 of the outer periphery of the opening 31 in the first main surface 32 of the shielding plate 30 . For example, the second wall portion 42 is integrally formed by the same member as the first wall portion 41 . Moreover, the 2nd wall part 42 may be fastened to the 1st wall part 41 by fastening members, such as a bolt. Accordingly, the relative movement of the injection head 20A and the shielding plate 30 in the front-back direction (x direction) is restricted.

Hereinafter, among the components of the marking device 4, the suction device 60 will be described. 13 is a perspective view showing the marking device 4 according to the first embodiment. FIG. 14 includes an enlarged view of main parts of FIG. 13 and is a view for explaining the action of the suction device 60 according to the first embodiment. For convenience, only the second suction mechanism 62 (lower suction mechanism) is shown in FIG. 13 , and the first suction mechanism 61 and the second suction mechanism 62 are shown in FIG. 14 . In addition, in FIG. 13, for convenience, the optical film F10X is indicated by a two-dot chain line.

As shown in Fig. 13, the marking device 4 includes a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a suction device 60.

As shown in FIG. 14, the suction device 60 is provided between the emitting surface 22 and the optical film F10X. The suction device 60 sucks the splashed droplets after the ink 4i is ejected from the ejection hole 21 until they land on the optical film F10X. The droplets are composed of a first droplet 4a that is scattered when the ink 4i is ejected from the ejection hole 21 and a second droplet 4b that is scattered when the ink 4i lands on the optical film F10X. contains at least one The first droplet 4a and the second droplet 4b have a particularly large effect on the printed object.

Here, as droplets scattered from the ejection of the ink 4i from the ejection hole 21 until it lands on the optical film F10X, besides the droplets 4a and 4b generated at the time of ink ejection and impact, the ink 4i ) is scattered during flight from the ejection hole 21 toward the optical film F10X. However, compared to the droplets 4a and 4b generated during ink ejection and landing, the number of droplets scattered by the ink 4i during flight is small, and the size of the droplet itself is very small, so it contaminates the printing target. It is thought that the effect of doing so is small.

In addition, the first droplets 4a pass through the opening 31 without being attached to the inner wall surface 31a of the opening 31 of the shielding plate 30 and float in the air. In addition, droplets from which the ink 4i is scattered during flight take the same behavior as the first droplets 4a.

As shown in FIG. 13 , in this embodiment, the suction device 60 includes a second suction mechanism 62 . The second suction mechanism 62 is disposed only below the injection passage Ia through which the ink 4i is injected in the vertical direction. The second suction mechanism 62 is formed with a suction surface 62f inclined forward and upward so as to face the injection passage Ia.

The suction hole 62h which attracts the 1st droplet 4a and the 2nd droplet 4b is formed in the suction surface 62f of the 2nd suction mechanism 62. The suction hole 62h has a long length and extends along the width direction (y direction) of the suction surface 62f on the suction surface 62f. In FIG. 13, as an example, the suction hole 62h extending along the width direction (y direction) of the suction surface 62f is shown, but the arrangement of the suction hole 62h is not limited to this, and a plurality of suction holes. The suction holes 62h are divided in the width direction (y direction) of the suction surface 62f so that the suction holes 62h are arranged side by side in the width direction (y direction) of the suction surface 62f. .

For example, the distance J1 between the suction surface 62f and the optical film F10X (hereinafter referred to as "the distance between the suction surface and the optical film") is a value of 10 mm or more. This reason is because there is a possibility that the suction surface 62f and the optical film F10X may contact when the distance J1 between the suction surface and the optical films is too small. In this embodiment, the distance J1 between the suction surface and the optical film is about 10 mm. In addition, the distance J1 between a suction surface and an optical film is made into the length of the line segment which connected the lower end of the suction surface 62f and the printing surface of the optical film F10X in the normal direction (x direction) of the printing surface.

For example, the distance J2 between the suction surface 62f and the fixing member 40 (hereinafter referred to as "the distance between the suction surface and the fixing member") is a value of 30 mm or more. This reason is because there is a possibility that the suction surface 62f and the fixing member 40 may contact when the distance J2 between the suction surface and the fixing member is too small. In this embodiment, the distance J2 between the suction surface and the fixing member is about 30 mm. In addition, the distance J2 between the suction surface and the fixing member is the length of the line segment connecting the upper end of the suction surface 62f and the lower end of the fixing member 40 in the normal direction (z direction) of the lower surface of the fixing member 40. do it with

For example, the distance J3 between the suction hole 62h and the injection hole 21 (hereinafter referred to as "the distance between the suction hole and the ejection hole") is preferably a value of 50 mm or less, more preferably 15 mm. It is a value within the range of 50 mm or more. In this embodiment, the distance J3 between the suction hole and the ejection hole is about 45 mm. In addition, the distance J3 between the suction hole and the ejection hole is a line segment connecting the center of the suction hole 62h on the suction surface 62f and the center of the ejection hole 21 on the emission surface 22. do it in length

For example, the length of the suction hole 62h is about the same as the length of the suction surface 62f in the width direction (y direction), specifically, the second suction hole is longer than the length of the suction surface 62f in the width direction (y direction). The length is as small as the thickness of the left and right side walls of the mechanism 62. In addition, the length of the suction hole 62h is set as the length of the longitudinal direction (y direction) of the suction hole 62h.

For example, the width of the suction hole 62h is preferably a value of 50 mm or less, more preferably a value in the range of 5 mm or more and 20 mm or less. In this embodiment, the width of the suction hole 62h is about 10 mm. In addition, the width|variety of the suction hole 62h is made into the length of the short longitudinal direction (inclination direction of the suction surface 62f) of the suction hole 62h.

For example, the wind speed at the time of sucking droplets through the suction hole 62h (hereinafter referred to as "suction wind speed") is preferably a value of 2 m/sec or more, more preferably 5 m/sec or more and 7 m/sec. It is set as the value in the following range. In this embodiment, the suction wind speed is 6.4 m/sec. In addition, the suction wind speed is a range in which the ink 4i (not droplets but main drops) is not pulled, and is a value in the range of 4 m/sec or more and 20 m/sec or less.

The size of the suction hole 62h can be changed. For example, the size of the suction hole 62h may be changed by providing a closing mechanism such as a shutter that can move along the longitudinal direction of the suction hole 62h on the suction surface 62f.

The second suction mechanism 62 has a shape extending obliquely forward and upward so that the suction surface 62f faces the injection passage Ia. Specifically, the second suction mechanism 62 is a suction surface 62f forming a rectangle having a long length in the width direction (y direction), and the left and right edges of the suction surface 62f as the upper bottom, extending forward and upward It has left and right side surfaces 64 forming a trapezoidal shape. A support shaft 65 protruding in the left and right directions (y direction) in parallel with the normal line of the left and right side faces 64 is provided at the rear end of the second suction mechanism 62 (the end on the -x direction side).

On the left and right sides of the second suction mechanism 62, a support mechanism 73 capable of rotationally supporting the second suction mechanism 62 is provided. Below the second suction mechanism 62, a stage 72 extending in the film width direction (y direction) is provided. The support mechanism 73 includes a support table 73a fixed to the stage 72, a support plate 73b fixed to the support table 73a, and a width direction inner end (+y direction side end) of the support plate 73b. It has a standing piece 73c extending upward from .

The rising piece 73c is formed with an opening in the thickness direction (y direction) of the rising piece 73c and a long hole 73h extending vertically. The supporting shaft 65 of the second suction mechanism 62 is inserted through the elongated hole 73h of the rising piece 73c. The size of the long hole 73h is such that the support shaft 65 can be moved up and down and can be rotated around the axis of the support shaft 65 . In the state of being inserted into the long hole 73h, the support shaft 65 protrudes left and right from the rising piece 73c. The 2nd suction mechanism 62 fixes the support shaft 65 to the erecting piece 73c with the fixture not shown, and the up-and-down movement and rotation around the axis of the support shaft 65 are regulated. For example, the position of the second suction mechanism 62 may be regulated by forming a screw thread at the left and right ends of the support shaft 65, attaching a nut or the like to the screw thread and tightening the screw.

Reference numeral 71 in the drawing denotes a support for supporting the droplet ejection device 20 . The support 71 extends in the width direction (y direction) of the droplet ejection device 20 . For example, the droplet ejection device 20 is fastened to the support 71 by a fastening member such as a bolt.

As described above, the marking device 4 according to the present embodiment is the marking device 4 capable of marking the mark 12 by injecting the ink 4i to the optical film F10X. A droplet ejection device 20 having an ejection surface 22 in which an ejection hole 21 for injecting ink 4i into the F10X is formed, provided between the ejection surface 22 and the optical film F10X, and ejecting At least one of the first droplet 4a that is scattered when the ink 4i is ejected from the hole 21 and the second droplet 4b that is scattered when the ink 4i lands on the optical film F10X is sucked. It is provided with a suction device 60 that can be.

According to this embodiment, between the emission surface 22 and the optical film F10X, the first droplet 4a and the ink 4i scattered when the ink 4i is ejected from the ejection hole 21 are optically By providing the suction device 60 capable of sucking at least one of the second droplets 4b that are scattered when they land on the film F10X, the droplet ejection device 20 as it is without installing the suction device 60 is provided. Compared to the case of ejecting the ink 4i, since the first droplet 4a and the second droplet 4b scattered between the emission surface 22 and the optical film F10X can be sucked, the ejection hole Even if the first droplet 4a is scattered when the ink 4i is ejected from the (21) or the second droplet 4b is scattered when the ink 4i lands on the optical film F10X, the first droplet ( 4a) and the 2nd droplet 4b are suppressed from adhering to the area other than the defect part of the optical film F10X, and product yield can be improved.

In addition, the second suction mechanism 62 is disposed only below the injection passage Ia through which the ink 4i is ejected in the vertical direction, thereby arranging the suction mechanism on both sides with the injection passage Ia interposed therebetween. In comparison, cost reduction is achieved with a simple configuration by reducing the number of parts, and at the same time, the first droplet 4a and the second droplet 4b that are scattered downward from the injection passage Ia under the influence of gravity are selectively sucked. can In particular, when the dot diameter is large (when there are many liquid droplets) and the optical film F10X is conveyed in the vertical direction, since there are many droplets scattered downward, the actual benefit (suction mechanism The actual wing disposed only lower than the injection passage Ia) becomes larger.

In the above embodiment, the second suction mechanism 62 has been described as an example in which the second suction mechanism 62 is disposed only below the injection passage Ia through which the ink 4i is injected in the vertical direction, but this is not limited to this embodiment. For example, as shown in FIG. 14, the suction device 60 includes a first suction mechanism 61 disposed on one side with the injection passage Ia through which the ink 4i is injected, and the injection passage Ia. You may provide the 2nd suction mechanism 62 arrange|positioned on the other side with ) interposed therebetween. That is, the suction mechanisms 61 and 62 may be arranged on both sides with the injection passage Ia interposed therebetween. Accordingly, the first droplets 4a and the second droplets 4b scattered on both sides with the ejection passage Ia interposed therebetween can be effectively sucked with a simple configuration.

In addition, the first suction mechanism 61 is disposed above the injection passage Ia in the vertical direction, and the second suction mechanism 62 (corresponding to the second suction mechanism 62 of the above embodiment) is arranged in the vertical direction. It may be disposed below the injection passage Ia. Accordingly, the first droplet 4a and the second droplet 4b scattered on both sides of the upper and lower sides of the ejection passage Ia can be effectively sucked with a simple configuration.

The first suction mechanism 61 sucks the first droplets 4a and the second droplets 4b scattered from the upper side of the injection passage Ia, and the second suction mechanism 62 sucks the lower portion of the injection passage Ia. The first droplet 4a and the second droplet 4b scattered from the air are sucked. The droplets sucked by the first suction mechanism 61 pass through the pipe and are transported in the direction of the arrow Q1, and the droplets sucked by the second suction mechanism 62 pass through the pipe and are transported in the direction of the arrow Q2, Each is stored in a tank not shown.

In addition, a shielding plate 30 provided on the ejection surface 22 and capable of blocking splashes 4a scattered when the ink 4i is ejected from the ejection hole 21 is further provided, and the shielding plate 30 In addition to being opened at a position opposite to the ejection hole 21, an opening 31 having an inner wall surface 31a blocking splashes 4a scattering in a direction crossing the normal line of the ejection surface 22 is formed. By doing this, compared to the case where the ink 4i is directly ejected from the droplet ejection device 20 without installing the shielding plate 30, the droplets 4a scattered in a direction crossing the normal line of the ejection surface 22 are reduced. Since the diffusion range, specifically, the scattering diameter L2 (refer to FIG. 9) centered on the mark 12 when the droplet 4a adheres to the optical film F10X can be reduced, the ejection hole 21 ), even if the droplets 4a are scattered when the ink 4i is ejected, the adhesion of the droplets 4a to areas other than the defective portion of the optical film F10X can be suppressed, and the yield of the product can be improved.

In addition, by providing a shielding plate 30 having a thickness t1 in a direction parallel to the normal of the emitting surface 22, the diffusion range of the droplets 4a can be reduced by adjusting the thickness t1 of the shielding plate 30. Since it can adjust, it can suppress that the droplet 4a adheres to the area|region other than the defective part of the optical film F10X. For example, by making the thickness t1 of the shielding plate 30 as large as possible within the range in which the shielding plate 30 does not touch the optical film F10X, the diffusion range of the droplet 4a can be made as small as possible.

In addition, by further providing a fixing member 40 capable of fixing the shielding plate 30 to the droplet ejection device 20, the shielding plate 30 It becomes easy to firmly fix to the droplet ejection device 20.

Further, the first wall portion where the fixing member 40 covers the side ends 23 and 33 located in a direction orthogonal to the normal to the ejection surface 22 in both the ejection head 20A and the shielding plate 30. 41 and the second wall portion 42 covering the outer edge 34 of the outer periphery of the opening 31 in the first main surface 32 of the shielding plate 30, thereby forming the shielding plate 30. While being firmly fixed to the injection head 20A, the relative movement of the injection head 20A and the shielding plate 30 in the front, rear, left, right, and up-down directions (xyz directions) can be controlled with a simple configuration.

In addition, the droplet ejection device 20 is provided with a plurality of ejection heads 20A capable of injecting the ink 4i, a plurality of shield plates 30 are provided for each of the plurality of ejection heads 20A, and a fixing member ( 40) is provided to fix the shield plate 30 to each of the plurality of ejection heads 20A, so that the shield plate 30 and the fixing member 40 are formed in a one-to-one relationship with each ejection head 20A. positioning of the injection head 20A, the shielding plate 30 and the fixing member 40 compared to the case where the shielding plate and the fixing member having sizes corresponding to the plurality of ejection heads 20A are provided. ) can be suppressed from shifting relative positions.

In addition, compared to the case where the shielding plate 30 comes into contact with the emission surface 22 and is separated from the emission surface 22, the front and back of the ejection head 20A and the shielding plate 30 It becomes easy to regulate the relative movement in the direction (x direction).

In addition, by making the diameter d1 of the opening 31 larger than the diameter d2 of the ejection hole 21, contact of the ink 4i ejected from the ejection hole 21 with the opening 31 can be avoided.

The defect inspection system 10 according to the present embodiment performs a defect inspection of the transport line 9 that transports the long strip-shaped optical film F10X and the optical film F10X transported by the transport line 9. It is provided with a defect inspection device 2 and a marking device 4 capable of printing a mark 12 by injecting ink 4i to the position of the defect 11 based on the defect inspection result.

According to this embodiment, by providing the above-described marking device 4, when the ink 4i is ejected from the ejection hole 21, the first droplet 4a is scattered or the ink 4i is scattered on the optical film F10X. Even if the 2nd droplet 4b scatters when it lands on it, it suppresses that the 1st droplet 4a and the 2nd droplet 4b adhere to the area|region other than the defective part of the optical film F10X, and the product yield can be improved. In addition, by providing a marking device 4 capable of printing a mark 12 by injecting ink 4i at the position of the defect 11 based on the defect inspection result, the mark 12 is printed according to the position of the defect. Since it can print, it is suppressed effectively that droplet 4a, 4b adheres to the area|region other than the defective site|part of optical film F10X, and the yield of a product can further be improved.

In addition, the marking device 4 injects the ink 4i in the horizontal direction orthogonal to the vertical direction with respect to the optical film F10X conveyed in the direction parallel to the vertical direction by the conveying line 9, so that the marking device 4 ) can suppress the natural drooping of the ink 4i downward from the ejection hole 21 due to the influence of gravity, compared to the case where the ink 4i is ejected from above with respect to the optical film F10X conveyed in the horizontal direction. can

The film manufacturing apparatus 1 according to this embodiment is equipped with the defect inspection system 10 mentioned above.

According to the present embodiment, by providing the above-described defect inspection system 10, when the ink 4i is ejected from the ejection hole 21, the first droplet 4a is scattered or the ink 4i is removed from the optical film F10X ), even if the 2nd droplet 4b scatters when it lands, it suppresses that the 1st droplet 4a and the 2nd droplet 4b adhere to the area|region other than the defective part of the optical film F10X, and a product yield can be improved. In addition, by printing the mark 12 according to the position of the defect, it is possible to effectively suppress the droplets 4a and 4b from adhering to regions other than the defective portion of the optical film F10X, thereby further improving the product yield. have.

The film manufacturing method according to the present embodiment includes a step of marking using the defect inspection system 10 described above.

According to the present embodiment, by including the above-described marking process, when the ink 4i is ejected from the ejection hole 21, the first droplet 4a is scattered or the ink 4i lands on the optical film F10X. Even if the 2nd droplet 4b is scattered at the time, the 1st droplet 4a and the 2nd droplet 4b are suppressed from adhering to the area|region other than the defect part of the optical film F10X, Improve the yield of a product can make it In addition, by printing the mark 12 according to the position of the defect, it is possible to effectively suppress the droplets 4a and 4b from adhering to regions other than the defective portion of the optical film F10X, thereby further improving the product yield. have.

By the way, as the cause of scattering of droplets when ink is ejected from the ejection hole, (A1) droplet amount, (A2) ink viscosity, and the like can be considered.

The above causes will be described below.

If the droplet amount is small, it is considered that droplets are hardly scattered when ink is ejected from the ejection hole, or even if the droplets are scattered, the effect of contaminating the optical film is small. On the other hand, the study of the present inventors revealed that, when the amount of droplets is large, droplets scatter when ink is ejected from the ejection hole, and the scattered droplets contaminate the optical film.

For example, in a commercially available inkjet printer, since the amount of droplets is as small as 1×10 ⁻⁶ μL, droplets hardly scatter when ink is ejected from the ejection hole, or even if droplets are scattered, the effect of contaminating the optical film is thought to be small. On the other hand, in the droplet ejection device 20 according to the present embodiment, since the amount of droplets is about 0.166 μL, which is quite large compared to commercially available inkjet printers, droplets are scattered when ink is ejected from the ejection hole, and the scattered droplets are optically It may contaminate the film.

In addition, it is considered that when the ink viscosity is high, droplets are hardly scattered when the ink is ejected from the ejection hole. On the other hand, the study of the present inventors revealed that, when the ink viscosity is low, droplets scatter when the ink is ejected from the ejection hole, and the scattered droplets contaminate the optical film.

For example, in a commercially available inkjet printer, the ink viscosity is about 1.17×10 ^-3 Pa·s. On the other hand, in the droplet ejection device 20 according to the present embodiment, the viscosity of the ink is about 0.89×10 ^-3 Pa·s, which is small compared to commercially available inkjet printers. Scattered droplets may contaminate the optical film.

Even if droplets are scattered when ink is ejected from the ejection hole due to the above causes (A1), (A2, etc.), according to the present embodiment, an opening is formed in the shield plate 30 at a position opposite to the ejection hole 21. In addition, by forming an opening 31 having an inner wall surface 31a to block the scattering droplets 4a in a direction crossing the normal of the emission surface 22, droplets are ejected without installing a shielding plate 30. Compared to the case of injecting the ink 4i as it is from the device 20, the diffusion range of the droplet 4a scattered in the direction crossing the normal of the ejection surface 22, specifically, the droplet 4a is the optical film Since the scattering diameter L2 (refer to FIG. 9) centered on the mark 12 when it adheres to (F10X) can be made small, the droplet 4a is directed to regions other than the defective part of the optical film F10X. Adhesion can be effectively suppressed, and the yield of products can be further improved.

On the other hand, as causes of scattering of droplets when ink lands on the optical film (target for printing), consider (B1) dot diameter (drop amount), (B2) ink viscosity, (B3) target for printing, (B4) line speed, etc. can

The above causes will be described below.

If the dot diameter is very small (the amount of droplets is very small), it is considered that droplets hardly scatter when the ink lands on the printing object, or even if the droplets are scattered, the effect of contaminating the printing object is small. On the other hand, when the dot diameter is large (the amount of droplets is large), the inventor's study revealed that droplets are scattered when the ink lands on the printing object, and the scattered droplets contaminate the printing object.

For example, in a commercially available inkjet printer, the dot diameter is very small, on the order of 20 μm, and the amount of droplets is estimated at about 1 × 10 ⁻⁶ μL, so that when the ink lands on the printing object, droplets hardly scatter or even if droplets are scattered. It is thought that the effect of contaminating the printing target is small. On the other hand, in the droplet ejection device 20 according to the present embodiment, the dot diameter is a value in the range of 1 mm or more and 10 mm or less, and the droplet amount is estimated to be about 0.166 µL, so the dot diameter is quite large compared to commercially available inkjet printers. For this reason (because the amount of droplets is quite large), droplets may scatter when the ink lands on the printing object, and the scattered droplets may contaminate the printing object.

Further, when the ink viscosity is high, it is considered that droplets are hardly scattered when the ink lands on the printing object. On the other hand, the study of the present inventors revealed that when the ink viscosity is low, droplets scatter when the ink lands on the printing object, and the scattered droplets contaminate the printing object.

For example, in a commercially available inkjet printer, the ink viscosity is about 1.17×10 ^-3 Pa·s. On the other hand, in the droplet ejection device 20 according to the present embodiment, the viscosity of the ink is about 0.89×10 ^-3 Pa·s, which is lower than that of commercially available inkjet printers. Scattered droplets may contaminate the printed object.

In addition, it is considered that if the object to be printed is a paper medium such as recording paper, droplets are hardly scattered when the ink lands on the object to be printed. On the other hand, when the printing object is an optical film containing PVA and TAC, the present inventor's examination revealed that droplets are scattered when the ink lands on the printing object, and the scattered droplets contaminate the printing object.

For example, in a commercially available inkjet printer, a printing object is a paper medium. On the other hand, in the droplet ejection device 20 according to the present embodiment, the printing target is an optical film, and droplets may scatter when ink lands on the printing target, and the scattered droplets may contaminate the printing target.

In addition, it is considered that when the line speed is small, droplets are hardly scattered when the ink lands on the printing object. On the other hand, the study of the present inventors revealed that when the line speed is high, droplets are scattered over a wide area when the ink lands on the printing object, and the scattered droplets contaminate the printing object.

For example, in a commercially available inkjet printer, the line speed is as low as 3 m/min. On the other hand, in the present embodiment, the line speed is a value of 30 m/min or less, and the upper limit of the range in which the mark 12 can be printed on the optical film F10X is a value of 50 m/min or less, and the ink There are cases where droplets are scattered over a wide area when they land on the printing object, and the scattered droplets contaminate the printing object.

Even if droplets are scattered when ink is ejected from the ejection hole due to the causes (A1), (A2), etc., droplets are scattered when ink lands on the printing target due to the causes (B1) to (B4). In any case, according to the present embodiment, between the ejection surface 22 and the optical film F10X, the first droplets 4a and the ink 4i scattered when the ink 4i is ejected from the ejection hole 21 ) is provided with a suction device 60 capable of sucking at least one of the second droplets 4b scattered when the droplet 4b lands on the optical film F10X, so that the droplet ejection device 20 is not provided ), compared to the case of ejecting the ink 4i as it is, since the first droplet 4a and the second droplet 4b scattered between the ejection surface 22 and the optical film F10X can be sucked. , The adhesion of the first droplet 4a and the second droplet 4b to areas other than the defective portion of the optical film F10X can be effectively suppressed, and the yield of the product can be further improved.

Modifications of the embodiments will be described below. In the following modifications, the same reference numerals are attached to components common to those of the first embodiment, and detailed descriptions thereof are omitted.

(First modified example of fixing member)

Fig. 10 is a view showing a first modified example of the fixing member, and is a sectional view corresponding to Fig. 8;

In the above embodiment, an example in which the fixing member 40 is formed as a member separate from the shielding plate 30 has been given. On the other hand, in this modified example, as shown in FIG. 10 , the fixing member 140 is integrally formed by the same member as the shielding plate 130 .

The fixing member 140 is fixed to the injection head 20A together with the shield plate 130 . The fixing member 140 includes a shielding plate 130 and a side wall portion 141 . For example, the fixing member 140 is formed of a metal plate such as SUS.

The side wall portion 141 covers the side end portion 23 located in a direction orthogonal to the normal of the ejection surface 22 in the ejection head 20A. The side wall portion 141 has a rectangular tubular shape extending in the front-back direction (x-direction). The side wall portion 141 abuts on the portion on the side of the ejection surface 22 at the side end portion 23 in the vertical direction (z direction) and width direction (y direction) of the ejection head 20A.

The shielding plate 130 has a rectangular frame shape extending from the front end (+x direction end) of the side wall portion 141 toward the inside in the z direction. The shielding plate 130 has an opening that is opened at a position opposite to the ejection hole 21 and has an inner wall surface 131a that blocks splashing droplets 4a in a direction crossing the normal to the ejection surface 22. (131) is formed. The shielding plate 130 abuts on the emitting surface 22 . In other words, the second main surface 135 of the shielding plate 130 is disposed on the same plane as the emission surface 22 .

For example, the side wall portion 141 is fastened to the injection head 20A by a fastening member such as a bolt. Accordingly, the relative movement of the injection head 20A and the shielding plate 30 in the vertical direction (z direction), width direction (y direction), and front-back direction (x direction) is restricted.

According to this modified example, the fixing member 140 is integrally formed with the shielding plate 130, and the side end portion 23 positioned in a direction orthogonal to the normal line of the ejection surface 22 in the ejection head 20A. By providing the side wall portion 141 covering the , while firmly fixing the shielding plate 130 to the injection head 20A, the relative position of the injection head 20A and the shielding plate 130 in the vertical direction (xyz direction) Movement can be regulated with a simple configuration. In addition, compared to the case where the fixing member 40 is formed as a member separate from the shield plate 30, the number of parts can be reduced, and the device configuration can be simplified.

(Second modified example of fixing member)

Fig. 11 is a view showing a second modified example of the fixing member, and is a sectional view corresponding to Fig. 8;

In the first modified example, an example in which the shielding plate 130 comes into contact with the emitting surface 22 is given. In contrast, in this modified example, as shown in FIG. 11 , the shielding plate 130 is separated from the emission surface 22 . Specifically, the second main surface 135 of the shielding plate 130 is disposed forward (+x direction) of the emission surface 22 .

According to this modification, by separating the shielding plate 130 from the emitting surface 22, the distance between the shielding plate 130 and the emitting surface 22 can be adjusted to adjust the diffusion range of the droplets 4a, It can suppress that the droplet 4a adheres to areas other than the defective part of the optical film F10X. For example, by making the distance between the shielding plate 130 and the emission surface 22 as large as possible within a range where the shielding plate 130 does not contact the optical film F10X, the diffusion range of the droplets 4a can be minimized. have. In addition, compared to the case where the shielding plate 130 comes into contact with the emitting surface 22, even if the thickness t1 of the shielding plate 130 is not adjusted, the distance between the shielding plate 130 and the emitting surface 22 is adjusted. Since the diffusion range of the droplet 4a can be adjusted only by this, the degree of freedom in design is improved.

(Modified example of shielding member)

Fig. 12 is a view showing a modified example of the shielding member, and is a sectional view corresponding to Fig. 8;

In the above embodiment, an example of providing the shielding plate 30 having a thickness in a direction parallel to the normal to the emitting surface 22 as the shielding member is given. On the other hand, in this modified example, as shown in FIG. 12, a cylinder member 230 extending in a direction parallel to the normal to the emitting surface 22 is provided as a shielding member.

The cylinder member 230 is formed with an opening 231 opened at a position facing the injection hole 21 . As shown in Fig. 12, the opening 231 has an inner wall surface 231a facing the injection passage Ia (see Fig. 9) through which ink is injected. When ink is ejected from the ejection hole 21, the inner wall surface 231a of the opening 231 blocks the splashing droplets 4a (see FIG. 9) in a direction crossing the normal line of the ejection surface 22.

The inner wall surface 231a of the opening 231 forms a cylindrical shape with the injection passage Ia as a central axis. The diameter of the opening 231 (the inner diameter of the cylinder member 230) is larger than the diameter of the ejection hole 21.

The cylinder member 230 abuts against the emitting surface 22 . In other words, the end surface 235 (second main surface) of the cylinder member 230 is disposed on the same plane as the emitting surface 22 .

According to this modified example, by providing the cylinder member 230 extending in a direction parallel to the normal of the emission surface 22, by adjusting the length of the cylinder member 230 (length in the x direction), the droplet 4a Since the diffusion range of ) can be adjusted, it can suppress that the droplet 4a adheres to areas other than the defective site of the optical film F10X. For example, by making the length of the cylinder member 230 as large as possible within a range in which the cylinder member 230 does not contact the optical film F10X, the diffusion range of the droplets 4a can be made as small as possible.

In addition, by making the diameter of the opening 231 larger than the diameter of the ejection hole 21, contact of the ink 4i ejected from the ejection hole 21 with the opening 231 can be avoided.

(Second Embodiment)

Hereinafter, the configuration of the marking device according to the second embodiment of the present invention will be described. Fig. 15 is a perspective view showing a marking device 204 according to the second embodiment. FIG. 16 includes an enlarged view of main parts of FIG. 15 and is a view for explaining the operation of the scattering control member 50 in the marking device 204 according to the second embodiment. 16, illustration of the fixing wall parts 53 and 54 is omitted for convenience. 15 and 16, illustration of the suction device 60 is omitted. In the present embodiment, the same reference numerals are assigned to components common to those in the first embodiment, and detailed descriptions thereof are omitted.

In the first embodiment, as shown in Fig. 13, an example is given in which the marking device 4 includes a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a suction device 60. . On the other hand, in this embodiment, as shown in FIG. 15, the marking device 204 is further equipped with the scattering control member 50.

As shown in FIG. 16, the scattering control member 50 is provided between the emitting surface 22 and the optical film F10X. Specifically, the scattering control member 50 is provided between the fixing member 40 and the optical film F10X ahead of the shielding plate 30 . The scattering control member 50 has a first droplet 4a that is scattered when the ink 4i is ejected from the ejection hole 21 and a second droplet that is scattered when the ink 4i lands on the optical film F10X. At least one of (4b) is blocked.

A blocking surface 50f extending in a direction orthogonal to the normal to the emission surface 22 is formed on the scattering control member 50 . In the scattering control member 50, the blocking surface 50f on the side of the emission surface 22 restricts the movement of the first droplet 4a to the side of the optical film F10X, and the blocking surface on the side of the optical film F10X (50f) restricts the movement of the second droplet 4b to the emission surface 22 side. That is, at least a part of the scattered first droplets 4a adheres to the blocking surface 50f on the side of the emission surface 22 in the scattering control member 50, and at least a part of the scattered second droplets 4b is adhered to the blocking surface 50f on the side of the optical film F10X in the scattering control member 50.

In addition, the blocking surface 50f is not limited to spreading in a direction orthogonal to the normal to the emitting surface 22, but may widen in a direction crossing the normal to the emitting surface 22. For example, from a viewpoint of effectively blocking the 1st droplet 4a and the 2nd droplet 4b, the blocking surface 50f is the direction parallel to the film conveyance direction so that the opposing area with the optical film F10X may become the largest. It is preferable to widen in a direction orthogonal to the normal of the emitting surface 22. In addition, if the above relationship cannot be maintained due to the relationship of facility layout, the angle formed by the normal line of the blocking surface 50f and the emission surface 22 may be adjusted so as to be as parallel to the film transport direction as possible.

As shown in Fig. 15, the scattering control member 50 includes scattering control plates 51 and 52 and fixing wall portions 53 and 54.

The scattering control plates 51 and 52 have a thickness in a direction (x direction) parallel to the normal to the emitting surface 22 . In this embodiment, the thickness of the scattering control plates 51 and 52 is about 3 mm. In addition, the thickness of the scattering control plates 51 and 52 may be appropriately set as needed, and should just be set to such an extent that the first droplet 4a and the second droplet 4b can be blocked.

The scattering control plates 51 and 52 are rectangular, having long sides in the film width direction (y direction shown in FIG. 15) and short sides in the film transport direction (z direction shown in FIG. 15). In this embodiment, the length of the long side of the scattering control plates 51 and 52 is about 1600 mm corresponding to the film width, and the length of the short side of the scattering control plates 51 and 52 is about 50 mm.

As shown in Fig. 16, the first scattering control plate 51 is disposed on one side with the injection passage Ia through which the ink 4i is injected. The second scattering control plate 52 is disposed on the other side with the ejection passage Ia interposed therebetween. The first scattering control plate 51 is disposed above the ejection passage Ia in the vertical direction, and the second scattering control plate 52 is disposed below the ejection passage Ia in the vertical direction. The first scattering control plate 51 and the second scattering control plate 52 are disposed adjacent to each other with the ejection passage Ia interposed therebetween. A first blocking surface 51f extending in a direction perpendicular to the normal to the emission surface 22 is formed on the first scattering control plate 51, and a first blocking surface 51f is formed on the second scattering control plate 52. A second blocking surface 52f widening parallel to is formed.

As shown in Fig. 15, the distance s1 at which the first scattering control plate 51 and the second scattering control plate 52 are separated (hereinafter referred to as "slit distance") is the diameter of the ejection hole 21. It is larger than (d2) (see Fig. 9). For example, the slit interval s1 is preferably a value in the range of 2 mm or more and 10 mm or less, more preferably a value in the range of 2 mm or more and 5 mm or less. The reason for this is that if the slit interval s1 is too small, there is a possibility that the ink 4i will not pass the slit interval s1, that is, the ink 4i will pass through the first scattering control plate 51 and the second scattering control plate 52. ), and if the slit interval s1 is too large, there is a possibility that the first droplet 4a may spread widely from the ejection hole 21. In this embodiment, the slit interval s1 is about 5 mm. Also, the diameter d2 of the injection hole 21 is about 1 mm.

The first fixed wall portion 53 includes an upper wall portion 53a and a side wall portion 53b. The first fixing wall portion 53 is integrally formed with the first scattering control plate 51 . The upper wall portion 53a of the first fixed wall portion 53 is integrally connected to the upper end of the first scattering control plate 51 and inclines to be located upward toward the rear (-x direction side). The side wall portion 53b of the first fixed wall portion 53 is integrally connected to the left and right ends of the first scattering control plate 51 and the left and right ends of the upper wall portion 53a, as well as toward the rear (-x direction side). After inclining to be positioned upward, it is bent and extended backward. Thereby, while the support rigidity of the 1st scattering control plate 51 is improved, the upward and left-right movement of the 1st droplet 4a can be regulated.

For example, the first fixing wall portion 53 is fastened to the injection head 20A by a fastening member such as a bolt. Accordingly, the relative movement of the injection head 20A, the first fixing wall portion 53, and the first scattering control plate 51 in the vertical direction (z direction), width direction (y direction), and front-back direction (x direction) regulated

The second fixed wall portion 54 includes a lower wall portion 54a and a side wall portion 54b. The second fixing wall portion 54 is integrally formed with the second scattering control plate 52 . The lower wall portion 54a of the second fixed wall portion 54 is integrally connected to the lower end of the second scattering control plate 52 and extends backward (-x direction). The side wall portion 54b of the second fixed wall portion 54 is integrally connected to the left and right ends of the lower part of the second scattering control plate 52 and the left and right ends of the lower wall portion 54a, and the rear end of the lower wall portion 54a. It extends posteriorly until it reaches Thereby, while the support rigidity of the 2nd scattering control plate 52 is improved, the downward and left-right movement of the 1st droplet 4a can be regulated.

For example, the second fixing wall portion 54 is fastened to the injection head 20A by a fastening member such as a bolt. Accordingly, the relative movement of the injection head 20A, the second fixing wall portion 54, and the second scattering control plate 52 in the vertical direction (z direction), width direction (y direction), and front-back direction (x direction) regulated

The blocking surface 50f on the side of the optical film F10X of the scattering control member 50 is separated from the optical film F10X. For example, the distance between the blocking surface 50f of the scattering control member 50 on the optical film F10X side and the optical film F10X (hereinafter referred to as "the distance between the blocking surface and the optical film") is preferably 10 A value of mm or less, more preferably a value of 1 mm or more and 5 mm or less. The reason for this is that if the distance between the blocking surface and the optical film is too small, there is a possibility that the scattering control member 50 comes into contact with the optical film F10X, and if the distance between the blocking surface and the optical film is too large, the scattering control member 50 may This is because there is a possibility that the movement of the second droplet 4b cannot be controlled by In this embodiment, the distance between the blocking surface and the optical film is about 3 mm.

The blocking surface 50f of the scattering control member 50 on the side of the emitting surface 22 is separated from the emitting surface 22 . For example, the distance between the emitting surface 22 and the blocking surface 50f on the side of the emitting surface 22 of the scattering control member 50 (hereinafter referred to as "the distance between the blocking surface and the emitting surface") is a value of 3 mm or more. to be In this embodiment, the distance between the blocking surface and the ejection surface is about 10 mm. The reason for this is that if the distance between the blocking surface and the emitting surface is too small, there is a possibility that the movement of the second droplet 4b cannot be regulated by the blocking surface 50f, and if the distance between the blocking surface and the emitting surface is too large, This is because it is necessary to increase the slit interval s1.

For example, the scattering control member 50 is formed of a metal plate such as SUS or a plastic plate such as an acrylic plate and a polypropylene plate (PP plate). In this embodiment, the scattering control member 50 is formed of an acrylic plate. Alternatively, the scattering control member 50 may be formed of a plate material that does not react to ink. Thereby, since corrosion by the ink of the scattering control member 50 can be suppressed, the corrosion resistance of the scattering control member 50 can be improved.

According to this embodiment, between the ejection surface 22 and the optical film F10X, the first droplet 4a and the ink 4i scattered when the ink 4i is ejected from the ejection hole 21 are disposed on the optical film A scattering control member 50 capable of blocking at least one of the second droplets 4b scattered when landing on (F10X) is provided, and the scattering control member 50 is provided in a direction orthogonal to the normal line of the emission surface 22. Compared with the case where the ink 4i is directly ejected from the droplet ejection device 20 without providing the scattering control member 50 by forming the blocking surface 50f widening to , the ejection surface 22 and the optical film Since the movement of the first droplet 4a between (F10X) to the optical film (F10X) side is regulated, and the movement of the second droplet 4b to the emitting surface 22 side can be regulated, the ejection hole Even if the first droplet 4a is scattered when the ink 4i is ejected from the (21) or the second droplet 4b is scattered when the ink 4i lands on the optical film F10X, the first droplet ( 4a) and the 2nd droplet 4b are suppressed from adhering to the area other than the defect part of the optical film F10X, and product yield can be improved.

In addition, the scattering control member 50 is provided with scattering control plates 51 and 52 having a thickness in the direction (x direction) parallel to the normal of the emitting surface 22, so that the scattering control plates 51 and 52 have a thickness. By adjusting the thickness, the rigidity of the scattering control plates 51 and 52 can be improved, and the first droplet 4a and the second droplet 4b can be effectively blocked.

In addition, the scattering control member 50 is disposed on one side of the ejection passage Ia through which the ink 4i is ejected, and the first scattering control plate 51 disposed on the other side of the ejection passage Ia. By providing the second scattering control plate 52 disposed therebetween, the first droplets 4a and the second droplets 4b scattered on both sides of the ejection passage Ia can be effectively blocked with a simple configuration.

In addition, the first scattering control plate 51 is disposed above the ejection passage Ia in the vertical direction and the second scattering control plate 52 is disposed below the ejection passage Ia in the vertical direction, so that the ejection passage It is possible to effectively block the first droplet 4a and the second droplet 4b scattered on both sides of the top and bottom with (Ia) in between with a simple configuration.

In addition, the first scattering control plate 51 is formed with a first blocking surface 51f extending in a direction perpendicular to the normal of the emission surface 22, and the second scattering control plate 52 has a first blocking surface ( 51f) by forming a second blocking surface 52f that widens in parallel, compared to the case where the first blocking surface 51f and the second blocking surface 52f cross each other, the emission surface 22 and the optical film The movement of the first droplet 4a between (F10X) to the optical film (F10X) side and the movement of the second droplet 4b to the emission surface 22 side are effectively regulated without biasing towards either regulation. can do.

Further, by making the slit interval s1 larger than the diameter d2 of the ejection hole 21, it is possible to avoid contact of the ink 4i to the first scattering control plate 51 and the second scattering control plate 52. .

Further, in the above embodiment, an example in which the first scattering control plate 51 and the second scattering control plate 52 are arranged on both sides with the injection passage Ia interposed therebetween has been described, but this is not limited to this embodiment. For example, the scattering control plate may be disposed only below the ejection passage Ia through which the ink 4i is ejected in the vertical direction. As a result, compared to the case where the first scattering control plate 51 and the second scattering control plate 52 are disposed on both sides with the injection passage Ia interposed therebetween, the cost can be reduced with a simple configuration by reducing the number of parts. At the same time, it is possible to selectively block the first droplets 4a and the second droplets 4b that are scattered downward from the ejection passage Ia under the influence of gravity. In particular, if the dot diameter is large (the amount of droplets is large), when the optical film F10X is conveyed in the vertical direction, the number of droplets scattering downward increases, so the scattering control plate is disposed only below the ejection passage Ia. profits increase

(Third Embodiment)

Hereinafter, the configuration of a marking device according to a third embodiment of the present invention will be described. FIG. 17 is a view showing a marking device 304 according to a third embodiment, and includes a cross section corresponding to FIG. 8 . In this embodiment, components common to the first embodiment and the second modified example of the first embodiment are assigned the same reference numerals, and detailed explanations thereof are omitted.

In the first embodiment, as shown in FIG. 13, the marking device 4 is provided with a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a suction device 60 as an example. , In the second modified example of the first embodiment, as shown in FIG. 11, the shielding plate 130 is injected in a configuration in which the fixing member 140 is integrally formed by the same member as the shielding plate 130. An example of separation from the surface 22 was given. In contrast, in this embodiment, as shown in FIG. 17 , the marking device 304 includes the droplet ejection device 20 , the fixing member 340 and the suction device 360 .

The fixing member 340 is integrally formed by the same member as the shielding plate 330 . The fixing member 340 is fixed to the injection head 20A together with the shield plate 330 . The fixing member 340 includes a shielding plate 330 and a side wall portion 141 . For example, the fixing member 340 is formed of a metal plate such as SUS.

The shielding plate 330 is separated from the emitting surface 22 . Specifically, the second main surface 335 of the shielding plate 330 is disposed forward (+x direction) of the emission surface 22 . By separating the shielding plate 330 from the emitting surface 22, the shielding plate 330 also functions as the scattering control member described above. Specifically, by separating the shielding plate 330 from the emission surface 22, the second main surface 335 (surface on the emission surface 22 side) of the shielding plate 330 is free from the first droplets 4a. The movement to the film F10X side is restricted, and the first main surface 332 (the surface on the optical film F10X side) of the shielding plate 330 prevents the second droplet 4b from moving to the emission surface 22 side. will be regulated

At the edge of the opening 331 of the shielding plate 330 on the side of the emission surface 22, there is a tapered surface 336a inclined with respect to the normal line of the emission surface 22 so as to face the emission hole 21. A portion 336 is formed. In addition, the edge of the opening 331 of the shielding plate 330 on the side of the emission surface 22 forms a boundary between the inner wall surface 331a of the opening 331 and the second main surface 335 of the shielding plate 330. do.

In this embodiment, the guide roll 7 which contacts optical film F10X is provided. The droplet ejection device 20 according to the present embodiment is disposed facing the guide roll 7 with the optical film F10X interposed therebetween while conveying the optical film F10X. The droplet ejection device 20 ejects the ink 4i (see Fig. 9) from the opposite side of the position of the optical film F10X in contact with the guide roll 7.

It is preferable that the optical film F10X is caught on the outer peripheral surface of the guide roll 7 in an angular range of 40° or more and 130° or less (hereinafter referred to as “holding angle θ”). Here, a holding angle is made into the value which showed the angular range of the part where the optical film F10X contacts the outer peripheral surface of the guide roll 7 in the circumferential direction by the central angle of the guide roll 7.

The reason for this is that, when the holding angle θ is less than 40°, the optical film F10X becomes easy to slide on the outer circumferential surface of the guide roll 7, and there is a possibility that scratches or the like may occur on the optical film F10X, and the holding angle It is because when (theta) exceeds 130 degrees, air bubbles become easy to interdigitate between a surface protection film and a polarizing film, for example.

Moreover, when the tension applied to the optical film F10X is small, it is preferable to set the holding angle θ to a value exceeding 90°, and it is more preferable to set it to 95° or more. Although fluctuations are more likely to occur as the tension applied to the optical film F10X is smaller, by setting the holding angle θ to 95° or more, fluctuations occur in the optical film F10X even when the tension applied to the optical film F10X is small. can suppress On the other hand, when the tension applied to the optical film F10X is large, the holding angle θ is preferably less than 90° and more preferably 85° or less. Thereby, even when the tension applied to the optical film F10X is large, it can suppress that the optical film F10X adheres to the outer peripheral surface of the guide roll 7 too much.

In addition, the conveyance speed of the optical film F10X is usually a value within the range of 9 m/min or more and 50 m/min or less. In addition, the tension applied to the optical film F10X is a value in the range of 400 N or more and 1500 N or less inside the drying furnace, and a value in the range of 200 N or more and 500 N or less outside the drying furnace. In addition, the width of the optical film F10X is a value in the range of 500 mm or more and 1500 mm or less, and the thickness of the optical film F10X is a value in the range of 10 μm or more and 300 μm or less. As the width of the optical film F10X increases, and as the thickness of the optical film F10X decreases, fluctuations are more likely to occur.

For example, it is preferable to set the outer diameter of the guide roll 7 to a value within the range of 100 mm or more and 150 mm or less. This reason increases the area of the optical film F10X in contact with the outer peripheral surface of the guide roll 7 relative to the holding angle θ when the outer diameter of the guide roll 7 is increased. Although fluctuation|fluctuation can be suppressed, it is because when the outer diameter of the guide roll 7 is enlarged too much, the above-mentioned scratch and bubble|bubble mesh|engagement etc. will arise in optical film F10X easily.

For example, the roundness of the guide roll 7 is preferably a value of 1.0 mm or less, more preferably a value of 0.5 mm or less. This reason is because the vibration of optical film F10X which contacts guide roll 7 can be suppressed, so that the roundness of guide roll 7 is small.

For example, the surface roughness (maximum roughness Ry) of the outer peripheral surface of the guide roll 7 is preferably a value of 100 s or less, more preferably a value of 25 s or less. This reason is because, when the surface roughness (maximum roughness Ry) in the outer circumferential surface of the guide roll 7 is too large, the above-mentioned scratches and meshing of air bubbles in the optical film F10X tend to occur.

Moreover, you may further provide the guide roll which contacts optical film F10X also in the upstream side of the guide roll 7 and the downstream side from a viewpoint of suppressing the fluctuation|fluctuation which arises in the optical film F10X more effectively. Moreover, you may give the optical film F10X a holding angle with respect to the guide roll to add.

The guide roll 7 becomes able to advance and retreat in the direction V2 which intersects the conveyance direction V1 of the optical film F10X. For example, by attaching a cylinder mechanism or the like to the guide roll 7, the guide roll 7 may be moved in oblique directions such as forward downward and backward upward. In this way, workability can be improved in terms of visibility, seams, head plastering, and the like.

Specifically, from the viewpoint of noticeability, when conveying the optical film F10 in a state in which the optical film F10 is not conveyed to the conveyance line 9 (a state in which it has not passed) (passing), a marking device ( 304) and the guide roll 7 means that the workability is improved by increasing the distance.

Next, it demonstrates from the viewpoint of a joint. When the film rolls R1 and R2 are exchanged, if the optical film F10X is connected with a tape or the like, a seam is formed. In the optical film F10X, the thickness of the seam portion is larger than the thickness of the normal portion (thickness of the seamless portion). Even in such a case, by making the guide roll 7 movable, contact between the seam portion and the marking device 304 can be avoided, and the optical film F10X can be conveyed by the conveyance line 9, and workability is improved. means that

Here, head plastering means cleaning of the head, and since the working space can be expanded by making the guide roll 7 movable, workability can be improved.

Further, the droplet ejection device 20 may be allowed to advance and retreat in a direction crossing the transport direction V1 of the optical film F10X (for example, the front-rear direction).

Reference numeral Va in FIG. 17 denotes a portion where the fixing member 340 and the guide roll 7 face each other (hereinafter referred to as “opposite portion”), including an ejection passage Ia (see FIG. 9 ) through which the ink 4i is ejected. 」.).

The suction device 360 includes a first suction mechanism 361 disposed on one side with the opposing portion Va interposed therebetween and a second suction mechanism 362 disposed on the other side with the opposing portion Va interposed therebetween. provide That is, the suction mechanisms 361 and 362 are disposed on both sides with the opposing portion Va interposed therebetween. Specifically, the first suction mechanism 361 is disposed above the opposing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the opposing portion Va in the vertical direction.

The first suction mechanism 361 is provided with a suction surface 361f that inclines forward and downward so as to face the opposing portion Va. The second suction mechanism 362 is provided with a suction surface 362f that inclines rearward and downward so as to face the opposing portion Va. A suction hole (not shown) for sucking the first droplet 4a and the second droplet 4b is formed on each of the suction surfaces 361f and 362f. Each suction mechanism 361, 362 is so that each suction surface 361f, 362f enters into the gap between the 1st main surface 332 of the shield plate 330 and the optical film F10X which contact|connects the guide roll 7. are placed

According to the present embodiment, the edge portion of the opening 331 of the shielding plate 330 on the side of the emission surface 22 is an inclined surface inclined with respect to the normal line of the emission surface 22 so as to face the emission hole 21. Since the first droplet 4a can be received on the inclined surface 336a by forming the tapered portion 336 having 336a, it is possible to avoid splitting the first droplet 4a. If the taper portion 336 is not formed at the edge of the opening 331 of the shielding plate 330 on the side of the emission surface 22, the inner wall surface 331a of the opening 331 and the shielding plate 330 Since a corner portion of about 90° is formed at the boundary with the second main surface 335 when viewed in cross section, the first droplet 4a scattered when the ink 4i is ejected from the injection hole 21 is formed at the corner portion. There is a possibility of division in

In addition, the suction device 360 includes a first suction mechanism 361 disposed on one side with the opposing portion Va interposed therebetween and a second suction mechanism 362 disposed on the other side with the opposing portion Va interposed therebetween. By providing, it is possible to effectively suck the first droplet 4a and the second droplet 4b scattered on both sides with the opposing portion Va interposed therebetween with a simple configuration.

In addition, the first suction mechanism 361 is disposed above the opposing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the opposing portion Va in the vertical direction, so that the opposing portion Va ), it is possible to effectively suck the first droplet 4a and the second droplet 4b scattered on both sides up and down with a simple configuration.

Moreover, each suction surface 361f, 362f of each suction mechanism 361, 362 is in the clearance gap between the 1st main surface 332 of the shield plate 330 and the optical film F10X which contact|connects the guide roll 7. Since the suction hole can be brought close to the ejection passage Ia by arranging so as to enter, the first droplet 4a and the second droplet 4b scattered between the ejection surface 22 and the optical film F10X are effectively sucked. can do. Moreover, by making the suction hole close to the landing position of the ink 4i, the 2nd droplet 4b can be suctioned more effectively.

Further, while the optical film F10X is conveyed, the droplet ejection device 20 is disposed facing the guide roll 7 in contact with the optical film F10X with the optical film F10X interposed therebetween, thereby arranging the optical film Since the droplet ejection device 20 and the fixing member 340 can be disposed in a state in which fluctuations occurring in (F10X) are suppressed, the distance between the shielding plate 330 of the fixing member 340 and the ejection surface 22 The diffusion range of the droplet 4a can be made as small as possible by making .

Further, by making the distance between the suction surface of the suction mechanisms 361 and 362 and the opposing portion Va as small as possible within a range in which the suction mechanisms 361 and 362 do not suck the optical film F10X, droplet 4a; 4b) can be absorbed as much as possible.

In addition, even in the case where the fixing member 340 (shielding plate 330) is not provided, the emitting surface 22 is the optical film ( F10X), the diffusion range of the droplet 4a can be made as small as possible by making it as small as possible within the range not contacting.

The defect inspection system 310 according to the present embodiment further includes a guide roll 7 in contact with the optical film F10X, and the marking device 304 sandwiches the optical film F10X, and the guide roll 7 ), and injects the ink 4i from the side opposite to the position in contact with the guide roll 7 of the optical film F10X.

According to the present embodiment, by further providing the guide roll 7 described above, the droplet ejection device 20 and the fixing member 340 can be disposed in a state in which fluctuations occurring in the optical film F10X are suppressed. Therefore, by making the distance between the shielding plate 330 of the fixing member 340 and the emission surface 22 as small as possible within a range where the shielding plate 330 does not come into contact with the optical film F10X, the droplets 4a are diffused. The range can be made as small as possible.

In this embodiment, the shielding plate 330 is flat, that is, the first main surface 332 of the shielding plate 330 is a plane parallel to the yz plane, but is not limited thereto. For example, the first main surface of the shield plate 330, that is, the first main surface of the shield plate 330, is an arc when viewed in cross section so that the portion of the shield plate 330 facing the guide roll 7 is recessed in the opposite direction to the guide roll 7. It is good also as a surface which forms an arc shape so that it may follow the outer peripheral surface of (7). Because of this, compared to the case where the shielding plate 330 is made flat, since the distance between the shielding plate 330 and the optical film F10X can be further reduced, the diffusion range of the droplets 4a is more effective. can be made small

In addition, this invention is not necessarily limited to the thing of the said embodiment, Various changes can be added in the range which does not deviate from the meaning of this invention.

In the above embodiment, an example in which the marking device injects the ink 4i in a direction orthogonal to the vertical direction with respect to the optical film F10X conveyed in a direction parallel to the vertical direction by the conveying line 9 has been described. Not limited to this. For example, the marking device may inject the ink 4i from below with respect to the optical film F10X conveyed in the horizontal direction. Also in this case, compared to the case where the marking device injects the ink 4i from above with respect to the optical film F10X conveyed in the horizontal direction, the ink 4i is naturally downward from the ejection hole 21 under the influence of gravity. sagging can be suppressed.

In the above embodiment, an example has been described in which scattering control plates and suction mechanisms are disposed on both sides of the injection passage Ia through which the ink 4i is ejected from the marking device, but is not limited to this. For example, droplets of the ink 4i are concentrated on one side with the ejection passage Ia interposed by the direction of the wind generated by the conveyance of the optical film F10X or the direction of the ejection passage Ia of the ink 4i. In the case of doing so, a scattering control plate or a suction mechanism may be disposed only on one side thereof.

Further, in the above embodiment, in the droplet ejection device 20 as shown in FIG. 7 and the like, the ejection head 20A having a plurality of ejection holes 21 covers the printing range in the width direction of the optical film F10X. Although a configuration in which a plurality of arrangements are arranged so as to be described as an example has been described, it is not limited thereto. For example, a droplet ejection device 20 having a single ejection head 20A having 1 to 3 ejection holes 21 is configured in the width direction of the optical film F10X according to the defect position information from the control device 6. And you may inject and print the ink 4i with respect to the defect position on the optical film F10X by moving in a conveyance direction. In addition, the scattering control plates 51 and 52 and the suction mechanisms 361 and 362 are also moved together with the droplet ejection device 20 to the defective position to prevent contamination of the optical film F10X due to splashes of the ink 4i. even good

In addition, although the said defect inspection system 10 demonstrated the structure provided in a part of film manufacturing apparatus 1 as an example, it is not limited to this. The said defect inspection system 10 may be independently installed separately from the film manufacturing apparatus 1. For example, the film manufacturing apparatus 1 is not equipped with the said defect inspection system 10, and the optical film F10X manufactured in the film manufacturing apparatus 1 is taken by the winding part 8, and the original of the optical film F10X After winding up on a core material as roll R2, it is sent to the next process, and the said defect inspection system 10 may be installed in some facilities in a next process.

In addition, the film to which the present invention is applied is not necessarily limited to optical films such as the above-described polarizing film, retardation film, and brightness enhancing film, and the present invention is widely applied to films on which printing is performed by a marking device. can do.

Although examples of preferred embodiments according to the present invention have been described with reference to the accompanying drawings, it is needless to say that the present invention is not limited to these examples. The various shapes, combinations, etc. of each constituent member shown in the above examples are examples, and various changes can be made based on design requirements and the like without departing from the gist of the present invention.

1: film manufacturing device
2: defect inspection device
4, 204, 304: marking device
4a: splash
4b: splash
7: guide roll
9: return line
10, 310: defect inspection system
11: Fault
12: Information
20: droplet ejection device
20A: injection head
21: injection hole
22: ejection surface
23: side end of droplet ejection device
30, 130, 230, 330: shielding member, shielding plate
31, 131, 231, 331: opening
31a, 131a, 231a, 331a: inner wall surface
32, 332: 1st main surface (surface opposite to the emission surface of the shielding plate)
33: side end of shield plate
34: outer edge of shield plate
40, 140, 340: fixing member
41: first wall portion
42: second wall
141, 341: side wall portion of the fixing member
230: barrel member
336: taper part
336a: slope
d1: Diameter of opening
d2: Diameter of injection hole
F10X: Optical Film

Claims (10)

As a marking device capable of marking information by injecting droplets onto an optical film,
a droplet ejection device having an ejection surface formed on the optical film with an ejection hole through which the droplets are ejected;
A suction device provided between the ejection surface and the optical film, capable of sucking droplets scattered from the ejection hole until the droplet lands on the optical film.
to provide,
The suction device includes a second suction mechanism arranged vertically below the ejection passage through which the droplets are ejected;
In the second suction mechanism, a suction surface inclined forward and upward to face the injection passage, a suction hole extending along the width direction of the suction surface, and a front upper portion with the left and right edges of the suction surface as an upper bottom. Left and right side surfaces extending to and support shafts protruding in the left and right directions in parallel with the normal of the left and right side surfaces are provided,
The marking device further includes a support mechanism for rotatably supporting the second suction mechanism, and the support mechanism is inserted into the support shaft of the second suction mechanism.
marking device. The method of claim 1, wherein the droplet includes at least one of a first droplet scattered when the droplet is ejected from the ejection hole and a second droplet scattered when the droplet lands on the optical film. marking device. delete The method of claim 1, wherein the ejection passage follows a direction crossing the vertical direction,
The suction device further includes a first suction mechanism;
The marking device according to claim 1 , wherein the first suction mechanism is disposed above the injection passage in a vertical direction. The marking device according to claim 1, wherein the suction device is only the second suction mechanism. The method of claim 1 or 2, further comprising a shielding member provided on the ejection surface and capable of blocking splashes scattered when the droplet is ejected from the ejection hole,
The marking device according to claim 1 , wherein the shielding member is formed with an opening that is opened at a position opposite to the ejection hole and has an inner wall surface for blocking the droplets scattered in a direction intersecting a normal line of the ejection surface. The scattering control member according to claim 1 or 2, which is provided between the ejection surface and the optical film and is capable of blocking splashes from being ejected from the ejection hole until the droplet lands on the optical film. additionally provided,
The marking device according to claim 1 , wherein a blocking surface extending in a direction intersecting a normal line of the emitting surface is formed on the scattering control member. The droplet ejection device according to claim 1 or 2, wherein the droplet ejection device is arranged to face a guide roll contacting the optical film with the optical film interposed therebetween while conveying the long strip-shaped optical film. Marking device for injecting the liquid droplet at a position opposite to a position of the optical film in contact with the guide roll. A conveyance line for conveying a long strip-shaped film;
A defect inspection device for inspecting defects of the film conveyed by the conveyance line;
The marking device according to claim 1 or 2, which is capable of marking information by injecting a liquid droplet at a location of a defect based on the defect inspection result.
Defect inspection system comprising a. A method for producing a film including a step of marking using the defect inspection system according to claim 9.

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