JP2018146361A - Marking device, defect inspection system, and method of manufacturing film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marking device with which it is possible to suppress splashes from sticking to an area other than the defect spot of a film and improve product yield even when splashes scatter before droplets impinge upon an optical film after being ejected from an ejection hole.SOLUTION: Provided is a marking device capable of marking information by ejecting droplets against an optical film, comprising: a droplet ejector having an ejection surface in which is formed an ejection hole for ejecting droplets to the optical film; and a splash restricting member, provided between the ejection surface and the optical film, for shutting off splashes that scatter before droplets impinge upon the optical film after being ejected from the ejection hole. A shutoff plane expanding in a direction that intersects the normal of the ejection surface is formed in the splash restricting member.SELECTED DRAWING: Figure 13

Description

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

For example, an optical film such as a polarizing film is wound around a core material after performing a defect inspection such as a foreign matter defect or an uneven defect. Information on the position and type of the defect (hereinafter referred to as “defect information”) is recorded on the optical film by printing a barcode on the end of the optical film in the width direction or marking the defective part. The When the winding amount reaches a certain amount, the optical film wound around the core is separated from the optical film on the upstream side and shipped as a raw roll. Moreover, a sheet (product) is taken out by cutting out an optical film based on the marking given to the defect location.
For example, Patent Document 1 clearly shows a detected defect portion while detecting a partial defect of a sheet-like product having a certain width and conveyed in a length direction perpendicular to the width direction. There is disclosed a defect marking device capable of scratching marking. On the other hand, Patent Document 2 exemplifies a non-contact printing method such as an ink jet as a marking means.

JP 2002-303580 A JP 2011-102985 A

  The present applicant is also developing a marking apparatus capable of marking information by ejecting droplets onto an optical film. This marking device includes a droplet ejection device having an ejection surface on which ejection holes for ejecting droplets are formed on an optical film. In such a marking device, in addition to the characteristics such as the size and viscosity of the liquid droplets ejected from the ejection holes, the liquid droplets are ejected from the ejection holes depending on the printing target on which the liquid droplets are ejected and the transport speed of the optical film. It has been clarified by the inventor's examination that the splashes are scattered after being applied to the optical film. If the splashed droplets adhere to areas other than the defective part of the optical film, the part that should be taken out as a product may become contaminated with the splash, and the dirty part may have to be discarded as a defective product, resulting in product yield. Could be reduced.

  The present invention has been made in view of the above circumstances, and even if the droplets are scattered from the time when the droplets are ejected from the ejection holes until they land on the optical film, the droplets are in areas other than the defective portions of the film. Provided are a marking device, a defect inspection system, and a film manufacturing method capable of suppressing adhesion and improving product yield.

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 onto an optical film, and an ejection hole for ejecting the droplets onto the optical film. A droplet ejection device having an ejection surface on which the droplets are formed, and is provided between the ejection surface and the optical film, and scatters after the droplets are ejected from the ejection holes until landing on the optical film. A splash restricting member capable of shutting off the splash, and the splash restricting member is formed with a shut-off surface extending in a direction intersecting with the normal line of the emission surface.

  (2) In the marking device according to (1), the splash is a first splash that scatters when the droplet is ejected from the ejection hole, and when the droplet lands on the optical film. It may include at least one of the second splashing splashes.

  (3) In the marking device according to (1) or (2), the scattering restriction member may include a scattering restriction plate having a thickness in a direction parallel to a normal line of the emission surface.

  (4) In the marking device according to (3), the scattering restriction plate sandwiches the ejection passage with the first scattering restriction plate disposed on one side across the ejection passage through which the droplets are ejected. And at least one of the second scattering restricting plates disposed on the other side.

  (5) In the marking device according to (4), the injection passage is along a direction intersecting a vertical direction, and the first scattering restriction plate is disposed above the injection passage in the vertical direction, The second scattering restriction plate may be disposed below the injection passage in the vertical direction.

  (6) In the marking device according to (4) or (5), the first scattering restriction plate is formed with a first blocking surface that extends in a direction intersecting with the normal line of the emission surface, and A second blocking surface that extends in parallel with the first blocking surface may be formed on the two-scattering restricting plate.

  (7) In the marking device according to any one of (4) to (6) above, the distance between the first scattering restriction plate and the second scattering restriction plate is larger than the diameter of the injection hole. It can be large.

  (8) In the marking device according to (5), the scattering restriction plate may be only the second scattering restriction plate.

  (9) In the marking device according to any one of (1) to (8), the spraying device that is provided on the ejection surface and that scatters when the droplet is ejected from the ejection hole can be blocked. The shield member is further provided with an opening having an inner wall surface that opens at a position opposed to the injection hole and blocks the splashes scattered in a direction intersecting the normal line of the emission surface. May be.

  (10) In the marking device according to (9), the diameter of the opening may be larger than the diameter of the injection hole.

  (11) In the marking device according to (9) or (10), a taper portion having an inclined surface facing the injection hole may be formed on an edge portion of the opening on the side of the injection surface. Good.

  (12) In the marking device according to any one of (1) to (11), the droplet is ejected from the ejection hole provided between the ejection surface and the optical film. You may further provide the attraction | suction apparatus which can attract | suck the splash which is scattered before landing on the said optical film.

  (13) In the marking device according to (12), the suction device includes a first suction mechanism disposed on one side across the ejection passage from which the droplets are ejected, and the other across the ejection passage. You may provide at least one with the 2nd suction mechanism arrange | positioned at the side.

  (14) In the marking device according to (13), the injection passage is along a direction intersecting a vertical direction, and the first suction mechanism is disposed above the injection passage in the vertical direction, The two suction mechanisms may be arranged below the injection passage in the vertical direction.

  (15) In the marking device according to (14), the suction device may be only the second suction mechanism.

  (16) In the marking device according to any one of (1) to (15), the liquid droplet ejection device is a guide that contacts the optical film while the long optical film is conveyed. The liquid droplets may be ejected from a side opposite to a position of the optical film that is in contact with the guide roll, with the optical film sandwiched between the rolls.

  (17) A defect inspection system according to one aspect of the present invention includes a conveyance line that conveys a long belt-shaped film, a defect inspection apparatus that performs defect inspection of a film conveyed by the conveyance line, and the defect inspection The marking device according to any one of (1) to (16), wherein information can be marked by ejecting a droplet to a defect position based on a result.

  (18) In the defect inspection system according to (17), the marking device ejects the droplets from a direction intersecting the vertical direction with respect to the film conveyed in the direction parallel to the vertical direction on the conveyance line. May be.

  (19) In the defect inspection system according to (17), the marking device ejects the droplets upward in the vertical direction with respect to the film conveyed in the direction intersecting the vertical direction on the conveyance line. Also good.

  (20) The defect inspection system according to any one of (17) to (19), further including a guide roll in contact with the film, wherein the marking device faces the guide roll with the film interposed therebetween. The droplets may be ejected from the opposite side of the film from the position in contact with the guide roll.

  (21) In the defect inspection system according to (20), the film may be multiplied by an outer peripheral surface of the guide roll in an angle range of 40 ° to 130 °.

  (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).

  (23) The film manufacturing method which concerns on one aspect of this invention includes the process of marking using the defect inspection system as described in any one of said (17) to (21).

  According to the present invention, even when the droplets are scattered from the time when the droplets are ejected from the ejection holes until they land on the optical film, the droplets are prevented from adhering to regions other than the defective portions of the film, It is possible to provide a marking device, a defect inspection system, and a film manufacturing method that can improve the yield of products.

It is a top view which shows an example of a liquid crystal display panel. It is II-II sectional drawing of FIG. It is sectional drawing which shows an example of an optical film. It is a side view which shows the structure of the film manufacturing apparatus which concerns on 1st embodiment. It is a perspective view which shows a product production process. It is a perspective view which shows the droplet injection apparatus, the shielding board, and fixing member in the marking apparatus which concern on 1st embodiment. It is a front view which shows the droplet injection apparatus, the shielding board, and fixing member in the marking apparatus which concern on 1st embodiment. It is VIII-VIII sectional drawing of FIG. It is a principal part enlarged view of FIG. 8, and is a figure for demonstrating the effect | action of the shielding board which concerns on 1st embodiment. It is a figure which shows the 1st modification of a fixing member, and is sectional drawing equivalent to FIG. It is a figure which shows the 2nd modification of a fixing member, and is sectional drawing equivalent to FIG. It is a figure which shows the modification of a shielding member, and is sectional drawing equivalent to FIG. It is a perspective view showing a marking device concerning a first embodiment. It is a figure for demonstrating the effect | action of the scattering control member in the marking apparatus which concerns on 1st embodiment including the principal part enlarged view of FIG. It is a perspective view which shows the marking apparatus which concerns on 2nd embodiment. It is a figure for demonstrating the effect | action of the attraction | suction apparatus in the marking apparatus which concerns on 2nd embodiment. It is a figure which shows the marking apparatus which concerns on 3rd embodiment, and is a figure containing the cross section corresponded in FIG.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
In this embodiment, as a production system for an optical display device, a film manufacturing apparatus constituting a part thereof and a film manufacturing method using the film manufacturing apparatus will be described.

  A film manufacturing apparatus manufactures resin-made film-like optical members (optical film). For example, examples of the optical film include a polarizing film, a retardation film, and a brightness enhancement film. For example, the optical film is bonded to a panel-like optical display component (optical display panel) such as a liquid crystal display panel and an organic EL display panel. The film manufacturing apparatus constitutes a part of a production system for producing an optical display device including such optical display components and optical members.

  In the present embodiment, a transmissive liquid crystal display device is illustrated as an optical display device. The transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, illumination light emitted from the backlight is incident from the back side of the liquid crystal display panel, and light modulated by the liquid crystal display panel is emitted from the front side of the liquid crystal display panel, thereby displaying an image. It is possible.

(Optical display device)
First, the configuration of the liquid crystal display panel P shown in FIGS. 1 and 2 will be described as an optical display device. FIG. 1 is a plan view showing an example of the liquid crystal display panel P. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. In FIG. 2, hatching 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 opposite to the first substrate P1, a first substrate P1, and a second substrate P1. And a liquid crystal layer P3 arranged between the substrate P2.

  The first substrate P1 is made of a transparent substrate having a rectangular shape in plan view. The second substrate P2 is a transparent substrate having a rectangular shape that is relatively smaller 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 sealing material (not shown), and is located inside a rectangular region in plan view surrounded by the sealing material. Has been placed. In the liquid crystal display panel P, an area that fits inside the outer periphery of the liquid crystal layer P3 in plan view is a display area P4, and an outer area that surrounds the display area P4 is a frame portion G.

  On the back 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 brightness enhancement film stacked on the first optical film F11 in order. It is laminated and bonded. On the surface (display surface side) of the liquid crystal display panel P, a second optical film F12 as a polarizing film is bonded. Hereinafter, a film including any one of the first to third optical films F11 to F13 may be collectively referred to as an optical film F1X.

(Optical film)
Next, an example of the optical film F1X shown in FIG. 3 will be described. FIG. 3 is a cross-sectional view showing the configuration of the optical film F1X. In FIG. 3, hatching showing a cross section is omitted.

  The optical film F1X is obtained by cutting out a sheet piece having a predetermined length from the long belt-like optical sheet FX shown in FIG. Specifically, the optical film F1X includes a base material sheet F4, an adhesive layer F5 provided on one surface (upper surface in FIG. 3) of the base material sheet F4, and the base material sheet F4 via the adhesive layer F5. Separator sheet F6 provided on one surface of the sheet, and a surface protection sheet F7 provided on the other surface (lower surface in FIG. 3) of the base sheet F4.

In the case of a polarizing film, for example, the base sheet F4 has a structure in which a polarizer F4a is sandwiched between a pair of protective films F4b and F4c. The adhesive layer F5 is for bonding the base sheet F4 to the liquid crystal display panel P. Separator sheet F6 protects adhesive layer F5. The separator sheet F6 is peeled from the adhesive layer F5 of the optical film F1X before the base sheet F4 is bonded to the liquid crystal display panel P via the adhesive layer F5. In addition, the part remove | excluding the separator sheet F6 from the optical film F1X is set as the bonding sheet | seat F8.
The surface protection sheet F7 protects the surface of the base material sheet F4. The surface protective sheet F7 is peeled from the surface of the base material sheet F4 after the base material sheet F4 of the bonding sheet F8 is attached to the liquid crystal display panel P.

  In addition, about the base material sheet F4, you may abbreviate | omit either one of a pair of protective films F4b and F4c. For example, the protective film F4b on the adhesive layer F5 side may be omitted, and the adhesive layer F5 may be provided directly on the polarizer F4a. The protective film F4c on the surface protective sheet F7 side may be subjected to a 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 antiglare effect. . Moreover, about the base material sheet F4, not only the laminated structure mentioned above but a single layer structure may be sufficient. Further, the surface protective sheet F7 may be omitted.

(Film manufacturing apparatus and film manufacturing method)
Next, the film manufacturing apparatus 1 shown in FIG. 4 will be described. FIG. 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 an optical film F10X in which a surface protective film is bonded to 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 process for manufacturing a raw roll (not shown) of a long strip-shaped polarizing film, and a long strip-shaped surface protective film is bonded to the long strip-shaped polarizing film. It includes a bonding process for manufacturing the original roll R1 of the long belt-shaped optical film F10X and a marking process for marking the position of the defect based on the result of the defect inspection of the long belt-shaped optical film F10X. In addition, after the marking process, a productizing process is performed in which the marked portion is removed as a defective product, and the unmarked portion is recovered as a non-defective product.

  For example, in the raw roll manufacturing process, a film that is a base material of a polarizer such as PVA (Polyvinyl Alcohol) is subjected to a dyeing process, a crosslinking process, a stretching process, and the like, and then both surfaces of the film subjected to the process. A protective film such as TAC (Triacetylcellulose) is bonded to a long band-shaped polarizing film, and a roll roll (not shown) is obtained by winding the manufactured polarizing film around a core material.

  In the bonding step, the long strip-shaped polarizing film and the long strip-shaped surface protective film are respectively obtained from the long strip-shaped polarizing film original roll and the long strip-shaped surface protective film original roll (not shown). A long strip-shaped optical film F10X is manufactured by being pinched and bonded with a nip roll or the like while being unwound, and the manufactured optical film F10X is wound around a core material to obtain an original fabric roll R1. For example, PET (Polyethylene terephthalate) is used as the surface protective film.

  In the marking step, information is marked on the optical film F10X by ejecting ink 4i (droplet) at the position of the defect based on the result of the defect inspection. Here, “ejecting” means, for example, ejecting the ink 4i from the ejection hole 21 shown in FIG. In the marking step, a dot-like mark larger than the defect is printed (marked) on the defective portion of the optical film F10X, thereby recording directly on the defective portion.

FIG. 5 is a perspective view showing a product production process.
As shown in FIG. 5, in the commercialization process, a plurality of single wafers (products) are obtained from the long belt-like optical film F <b> 10 </ b> X. In the vicinity of the defect 11 in the optical film F <b> 10 </ b> X, a dot-shaped mark 12 larger than the defect 11 is printed. The area MA in the optical film F10X is an area where marking (hereinafter referred to as “full width marking”) is performed on the entire 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 for cutting the optical film F10X based on the marking information. In the cutting process, the sheet (product) is taken out by cutting out the optical film F10X based on the marking information. In the product production process, the marked part is removed as a defective product 13 and the unmarked part is recovered as a good product 14.

  As shown in FIG. 4, the film manufacturing apparatus 1 includes a conveyance line 9. The conveyance line 9 forms the conveyance path | route which conveys the elongate strip-shaped optical film F10X unwound from the original fabric roll R1. The optical film F <b> 10 </ b> X is subjected to predetermined processing such as defect inspection and marking, and is wound around the core material as an original roll R <b> 2 after the predetermined processing in the winding unit 8.

  A pair of nip rolls 5 a and 5 b are arranged on the transport line 9. Note that an accumulator (not shown) including a plurality of dancer rolls and a guide roll 7 (see FIG. 17) may be arranged on the transport line 9.

  The pair of nip rolls 5a and 5b pulls the optical film F10X in the direction V1 of the arrow shown in FIG. 4 (the transport direction of the optical film F10X) by rotating in opposite directions while sandwiching the optical film F10X between them. It is.

The accumulator (not shown) is for absorbing the difference due to the fluctuation of the feeding amount of the optical film F10X and reducing the fluctuation of the tension applied to the optical film F10X.
For example, the accumulator has a configuration 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 in a predetermined section of the transport line 9.

  In the accumulator, the upper side dancer roll and the lower side dancer roll are transported while the optical film F10X is alternately wound on the upper side dancer roll and the lower side dancer roll. Move up and down relatively. Thereby, it is possible to accumulate the optical film F10X without stopping the transport line 9. For example, the accumulator increases the accumulation of the optical film F10X by increasing the distance between the upper dancer roll and the lower dancer roll, while increasing the distance between the upper dancer roll and the lower dancer roll. By narrowing the distance, the accumulation of the optical film F10X can be reduced. The accumulator is operated, for example, at the time of work such as paper splicing after replacing the core materials of the raw fabric rolls R1 and R2.

  The guide roll 7 (see FIG. 17) guides the optical film F10X drawn by the nip rolls 5a and 5b to the downstream side of the transport line 9 while rotating. Note that the number of guide rolls 7 is not limited to one, and a plurality of guide rolls 7 may be arranged.

  The optical film F <b> 10 </ b> X is wound around the core material as a raw roll R <b> 2 after the predetermined processing in the winding unit 8, and then sent to the next process (see 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 conveyance line 9, a defect inspection device 2, a defect information reading device 3, a marking device 4, and a control device 6.

  The defect inspection apparatus 2 performs a defect inspection of the optical film F10X. Specifically, the defect inspection apparatus 2 detects various defects such as a foreign matter defect, a concavo-convex defect, and a bright spot defect generated when the optical film F10X is manufactured and when the optical film F10X is conveyed. The defect inspection apparatus 2 performs, for example, inspection processing such as reflection inspection, transmission inspection, oblique transmission inspection, and crossed Nicol transmission inspection on the optical film F10X conveyed by the conveyance line 9, thereby Detect defects.

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

  In the case where the defect inspection apparatus 2 is configured to detect transmitted light, a plurality of illumination units and light detection units arranged in the transport direction of the optical film F10X are arranged to face each other with the optical film F10X interposed therebetween. The defect inspection apparatus 2 is not limited to a configuration that detects transmitted light, but may be a configuration that detects reflected light or a configuration that detects transmitted light and reflected light. In the case of detecting reflected light, the light detection unit may be disposed on the illumination unit side.

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

  In addition, based on the result of the defect inspection of this defect inspection apparatus which performs the defect inspection of the long strip | belt-shaped polarizing film before a long strip | belt-shaped optical film and a long strip | belt-shaped surface protection film are bonded together. You may further provide the recording apparatus (all are not shown) which records defect information on the said polarizing film. A defect inspection apparatus (not shown) has the same configuration as the defect inspection apparatus 2 described above, and detects a defect in the polarizing film.

  The defect information recorded by the recording apparatus (not shown) includes information on the position and type of the defect, and for example, an identification code such as a character, a barcode, a two-dimensional code (DataMatrix code, QR code (registered trademark), etc.) As recorded. In the identification code, for example, information indicating how far a defect detected by a defect inspection apparatus (not shown) exists at a position along the film width direction from the position where the identification code is printed ( Information on the position of the defect). The identification code may include information on the type of detected defect.

  The recording apparatus is provided on the downstream side of the defect inspection apparatus (not shown) in the polarizing film conveyance line. The recording apparatus has a print head that employs, for example, an inkjet method. This print head discharges the ink at a position along the edge (edge) in the width direction of the polarizing film, and prints the defect information.

  The defect information reading device 3 is provided on the downstream side of the defect inspection device 2 in the transport line 9. The defect information reading device 3 reads defect information recorded on the optical film F10X (the polarizing film). The defect information reading device 3 has an imaging device. The imaging device images defect information of the conveyed optical film F10X using an imaging element such as a CCD.

  The defect information reading device 3 includes information on the position and type of the defect, for example, defect information recorded as an identification code such as a character, a bar code, a two-dimensional code (DataMatrix code, QR code (registered trademark), etc.) Read. For example, by reading the defect information, information indicating how far the defect detected by the defect inspection apparatus 2 or the like exists at a position along the film width direction from the position where the identification code is printed. (Information on the position of the defect) is obtained. If the identification code includes information on the detected defect type, the defect information is read to obtain information on the detected defect type. 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 provided on the downstream side of the defect information reading device 3 in the transport line 9. The marking device 4 marks information on the optical film F10X by ejecting ink 4i to the position of the defect based on the result of the defect inspection. The marking device 4 prints (marks) a dot-like mark larger than the defect on the defective portion of the optical film F10X, thereby recording directly on the defective portion.

  In addition, the marking device 4 may perform recording directly 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, in addition to the mark, information on the type of defect may be recorded by printing a symbol or pattern indicating the type of defect on the defective part.

  The defect inspection system 10 may include a length measuring device (not shown) that measures the transport amount of the optical film F10X. For example, as a length measuring device, an angular position sensor such as a rotary encoder may be disposed on the nip roll in the transport line 9. The length measuring device measures the transport amount of the optical film F10X according to the rotational displacement amount of the nip roll that rotates in contact with the optical film F10X. The measurement result of the length measuring device is output to the control device 6.

  The control device 6 performs overall control of each part of the film manufacturing apparatus 1. Specifically, the control device 6 includes a computer system as an electronic control device. The computer system includes an arithmetic processing unit such as a CPU and an information storage unit such as a memory and a hard disk.

  The information storage unit of the control device 6 stores an operating system (OS) that controls the computer system, a program that causes the arithmetic processing unit to execute various processes in each unit of the film manufacturing apparatus 1, and the like. In addition, the control device 6 may include a logic circuit such as an ASIC that executes various processes required for controlling each part of the film manufacturing apparatus 1. The control device 6 includes an interface for performing input / output with an external device of the computer system. For example, an input device such as a keyboard or a mouse, a display device such as a liquid crystal display, or a communication device can be connected to this interface.

  The control device 6 analyzes the image captured by the light detection unit of the defect inspection device, and determines the presence / absence (position), type, and the like of the defect. When it determines with the control apparatus 6 having a defect in a polarizing film, it controls a recording device and records defect information on a polarizing film. When it is determined that the optical film F10X has a defect based on the inspection result of the defect inspection device, the reading result of the defect information reading device 3, and the like, the control device 6 controls the marking device 4 to the optical film F10X. Print the mark.

(Marking device)
Next, the marking device 4 provided 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 scattering restriction member 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 scattering restriction member 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 dot-shaped marks 12 larger than the defects on the defective portions of the optical film F10X by ejecting the ink 4i onto the optical film F10X.

  In the following description, an xyz orthogonal coordinate system is set as necessary, and the positional relationship of each member will be described with reference to this xyz orthogonal coordinate system. In the present embodiment, the normal direction of the ejection surface 22 of the droplet ejection apparatus 20 is the x direction, and the direction (width direction of the ejection surface 22) perpendicular to the x direction in the plane of the ejection surface 22 is the y direction. The direction orthogonal to the x direction and the y direction is taken 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 (up and down direction). The x direction may be referred to as the front-rear direction and the y direction may be referred to as the left-right direction. The + x direction may be 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 ejects the ink 4i from the horizontal direction perpendicular to the vertical direction to the optical film F10X conveyed in the direction V1 (upward) parallel to the vertical direction on the conveyance line 9. . For example, the conveyance speed (hereinafter referred to as “line speed”) of the optical film F10X is set to a value of 50 m / min or less as a range in which the mark 12 can be printed on the optical film F10X. In the present embodiment, the line speed is set to a value of 30 m / min or less.

  FIG. 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. 8 is a sectional view taken along line VIII-VIII in FIG. 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. 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 20 </ b> A capable of ejecting ink. In FIG. 7, three injection heads 20A are illustrated as an example, but the number of injection heads 20A is not limited to this, and may be set as necessary, such as one, two, or four or more. The ejection head 20A has a rectangular parallelepiped shape having a length in the y direction. The ejection surface 22 (see FIG. 8) of the ejection head 20A has a rectangular shape having a length in the y direction when viewed from the front in FIG.

  A plurality of shielding plates 30 are provided for each of the plurality of ejection heads 20A. In FIG. 7, as an example, three shielding plates 30 provided for each of the three ejection heads 20A are illustrated, but the number of shielding plates 30 is not limited to this, and can be set according to the number of ejection heads 20A. One, two, or four or more can be set as necessary. A surface 32 (hereinafter referred to as “first main surface”) opposite to the exit surface 22 of the shielding plate 30 has a rectangular shape having substantially the same size as the exit surface 22 in a front view of FIG.

  A plurality of fixing members 40 are provided so that the shielding plate 30 can be fixed for each of the plurality of ejection heads 20A. In FIG. 7, as an example, three fixing members 40 that can fix the shielding plate 30 for each of the three ejection heads 20 </ b> A are illustrated. It can be set according to the number of the plates 30, and can be set as necessary, such as one, two, four or more. The fixing member 40 has a rectangular frame shape along the outer shape of the first main surface 32 of the shielding plate 30 in a front view of FIG.

  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 (hereinafter referred to as “dot diameter”) printed on the optical film F10X. ) In the range of 1 mm to 10 mm, the value is in the range of 0.05 μL to 0.2 μL. 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 × in order to make the dot diameter within a range of 1 mm to 10 mm. 10 ^-3 Pa · s or more and the value of 1.00 × ¹⁰ -3 Pa · s or less. In the present embodiment, the ink viscosity is 0.89 × 10 ⁻³ Pa · s.

For example, the ejection speed of ink from the ejection head 20A (hereinafter referred to as “ink ejection speed”).
) Is a printable range of 1 m / s to 10 m / s, preferably 4 m / s to 5 m / s. In the present embodiment, the ink ejection speed is about 4.2 m / s. By setting the ink ejection speed within the above range, it is possible to accurately print on the target print area of the optical film F10 being conveyed, and the droplets upon ink landing (for example, the second droplet 4b shown in FIG. 14). ) Can be suppressed. Here, “ink landing” indicates that the ejected ink 4i comes into contact with the optical film F10X and prints on the optical film F10X while destroying the shape of the ink 4i.

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

For example, the ejection pressure of ink from the ejection head 20A (hereinafter referred to as “ink ejection pressure”).
) Is a value in the range of 0.030 MPa or less, preferably 0.020 MPa or more and 0.028 MPa or less as a range in which the mark 12 can be printed on the optical film F10X.
In the present embodiment, the ink ejection pressure is about 0.025 MPa. By setting the ink ejection pressure within the above range, the ink ejection speed is stabilized, and the generation of the splash 4a at the time of ink ejection and the splash at the time of ink landing (for example, the second splash 4b shown in FIG. 14) is suppressed. Can do.

  For example, the distance K1 (see FIG. 9) between the injection hole 21 of the injection head 20A and the optical film F10X is a value that is 50 mm or less, preferably 5 mm or more and 15 mm or less as a range in which the mark 12 can be printed on the optical film F10X. The value of This is because if the distance K1 is made too small, the ejection head 20A may come into contact with the optical film F10X, and if the distance K1 is made too large, the splashes scattered when the ink is ejected from the ejection holes 21 spread over a wide range. Because there is a possibility. In this embodiment, the distance K1 is about 13 mm. The distance K1 is the length of a line segment connecting the center of the injection hole 21 on the emission surface 22 and the printing surface (surface on the −x direction side) of the optical film F10X in the normal direction of the emission surface 22. 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 the conveyance of the optical film F10X is a value within a range of 0.5 m / s or less, preferably 0.2 m / s or less as a range in which the mark 12 can be printed on the optical film F10X. Range value. 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, the generated splashes 4a and 4b can be prevented from spreading over a wide range.

  A plurality of ejection holes 21 for ejecting ink to the optical film F10X are formed on the ejection surface 22 of the ejection head 20A (droplet ejection device 20). The plurality of injection holes 21 are arranged in a line along the width direction (y direction) of the emission surface 22 at the center of the emission surface 22 in the vertical direction (z direction). In FIG. 7, as an example, nine injection holes 21 are illustrated for one injection surface 22, but in this embodiment, 16 injection holes 21 are formed for one injection surface 22. The number of the injection holes 21 is not limited to this, and can be set as necessary, such as a number of 8 or less or a number of 10 or more. Moreover, the row | line | column of the injection hole 21 is not restricted to one row | line | column, It can set suitably as needed, such as two or more rows. The injection hole 21 has a circular shape when viewed from the front in FIG.

  As shown in FIG. 8, the shielding plate 30 is provided on the exit surface 22. As shown in FIG. 9, the shielding plate 30 has a thickness t <b> 1 in a direction (x direction) parallel to the normal line of the emission surface 22. For example, the thickness t1 of the shielding plate 30 is preferably a value in the range of 2 mm to 10 mm, more preferably a value in the range of 2 mm to 5 mm. In the present embodiment, the thickness t1 of the shielding plate 30 is about 3 mm. The thickness t1 of the shielding plate 30 may be as large as possible within a range where the shielding plate 30 does not contact the optical film F10X.

The shielding plate 30 can block the splashes 4 a that are scattered when the ink 4 i is ejected from the ejection holes 21. The shielding plate 30 is formed with an opening 31 that opens at a position facing the injection hole 21. The opening 31 has an inner wall surface 31a facing the ejection passage Ia from which the ink 4i is ejected.
The inner wall surface 31a of the opening 31 has a cylindrical shape with the injection path Ia as the central axis. The inner wall surface 31 a of the opening 31 blocks the splash 4 a that scatters in a direction intersecting with the normal line of the ejection surface 22 when the ink 4 i is ejected from the ejection hole 21. At least a part of the splashed droplet 4 a adheres to the inner wall surface 31 a of the opening 31.

  As shown in FIG. 7, a plurality of openings 31 are provided for each of the plurality of injection holes 21. The plurality of openings 31 are arranged in a line along the width direction (y direction) of the first main surface 32 at the center in the vertical direction (z direction) of the first main surface 32. In FIG. 7, as an example, nine openings 31 are illustrated for one shielding plate 30, but in the present embodiment, 16 openings corresponding to 16 injection holes 21 are provided for one shielding plate 30. A part 31 is provided. The number of openings 31 is not limited to this, and can be set as necessary, such as a number of 8 or less or a number of 10 or more. Moreover, the row | line | column of the opening part 31 is not restricted to one row | line | column, It can set suitably as needed, such as two or more rows. The opening 31 has a circular shape when viewed from the front in FIG.

  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 between the diameter d1 of the opening 31 and the diameter d2 of the injection hole 21 is preferably a value in the range of 1.5 or more and 5 or less, more preferably a value in the range of 2 or more and 4 or less. To do. In the present 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 injection hole 21 is about 1 mm. The diameter d2 of the injection hole 21 may be 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 a value of 10 mm or less, more preferably a value of 5 mm or less. In the present embodiment, the distance L1 is about 10 mm. The distance L1 may be as small as possible as long as the shielding plate 30 is not in contact with the optical film F10X.

  The shielding plate 30 contacts the emission surface 22. In other words, the surface 35 (hereinafter referred to as “second main surface”) on the exit surface 22 side of the shielding plate 30 is disposed on the same plane as the exit 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 the present embodiment, the shielding plate 30 is formed of an acrylic plate. The shielding plate 30 may be formed of a plate material that does not react with ink. Thereby, since the corrosion by the ink of the shielding board 30 can be suppressed, the corrosion resistance of the shielding board 30 can be improved.

  The fixing member 40 fixes the shielding 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 the side end portions 23 and 33 located in the direction perpendicular to the normal line of the emission surface 22 in both the ejection head 20 </ b> A and the shielding plate 30. The 1st wall part 41 makes the rectangular cylinder shape extended in the front-back direction (x direction). The first wall portion 41 includes a portion of the side end portion 23 in the vertical direction (z direction) and the width direction (y direction) of the ejection head 20A, and the vertical direction (z direction) and width of the shielding plate 30. It abuts both the side end 33 in the direction (y direction). For example, the first wall portion 41 is fastened to the injection head 20A by a fastening member such as a bolt. Thereby, the relative movement of the injection head 20A and the shielding plate 30 in the vertical direction (z direction) and the width direction (y direction) is restricted.

  The second wall portion 42 covers the outer edge portion 34 on the outer periphery of the opening portion 31 in the first main surface 32 of the shielding plate 30. The second wall portion 42 has a rectangular frame shape extending inward in the z direction from the front end (+ x direction end) of the first wall portion 41. The second wall 42 abuts on the outer edge 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 formed integrally with the same member as the first wall portion 41. The second wall portion 42 may be fastened to the first wall portion 41 by a fastening member such as a bolt. Thereby, the relative movement of the injection head 20A and the shielding plate 30 in the front-rear direction (x direction) is restricted.

  Hereinafter, among the components of the marking device 4, the scattering restriction member 50 will be described. FIG. 13 is a perspective view showing the marking device 4 according to the first embodiment. FIG. 14 is a diagram for explaining the operation of the scattering restricting member 50 in the marking device 4 according to the first embodiment, including an enlarged view of a main part of FIG. In FIG. 14, illustration of the fixed wall portions 53 and 54 is omitted for convenience.

  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 scattering restriction member 50.

  As shown in FIG. 14, the scattering restricting member 50 is provided between the emission surface 22 and the optical film F10X. Specifically, the scattering restriction member 50 is provided between the fixing member 40 and the optical film F10X in front of the shielding plate 30. The splash restricting member 50 blocks the splashes that are scattered after the ink 4i is ejected from the ejection hole 21 until it is landed on the optical film F10X. The splash includes at least one of a first splash 4a that scatters when the ink 4i is ejected from the ejection hole 21 and a second splash 4b that scatters when the ink 4i lands on the optical film F10X. The first droplet 4a and the second droplet 4b have a particularly large influence on the print target.

  Here, as the splashes that are scattered from the time when the ink 4i is ejected from the ejection hole 21 to the time when the ink 4i is landed on the optical film F10X, the ink 4i is ejected from the ejection hole 21 in addition to the splashes 4a and 4b that are generated at the time of ink ejection and landing. Examples include splashes scattered during the flight toward the optical film F10X. However, the number of splashes that the ink 4i scatters during the flight is smaller than the splashes 4a and 4b that are generated during ink ejection and landing, and the size of the splashes is very small. The impact of this is considered to be small.

  The first splash 4a includes a thing that does not adhere to the inner wall surface 31a of the opening 31 of the shielding plate 30 and floats in the air through the opening 31. In addition, the splashes that the ink 4i scatters during the flight behave in the same manner as the first splashes 4a.

  The scattering regulating member 50 is formed with a blocking surface 50f that extends in a direction perpendicular to the normal line of the emission surface 22. In the scattering restricting member 50, the blocking surface 50f on the exit surface 22 side restricts the movement of the first droplet 4a to the optical film F10X side, and the blocking surface 50f on the optical film F10X side has the second droplet 4b. The movement to the exit surface 22 side is restricted. That is, at least a part of the scattered first droplet 4 a adheres to the blocking surface 50 f on the emission surface 22 side of the scattering regulating member 50, and at least a part of the scattered second droplet 4 b is in the scattering regulating member 50. It adheres to the blocking surface 50f on the optical film F10X side.

  The blocking surface 50f is not limited to extend in a direction orthogonal to the normal line of the exit surface 22, but may extend in a direction intersecting with the normal line of the exit surface 22. For example, from the viewpoint of effectively blocking the first droplet 4a and the second droplet 4b, the blocking surface 50f is in a direction parallel to the film transport direction so that the area facing the optical film F10X is maximized. Further, it is preferable to spread in a direction orthogonal to the normal line of the exit surface 50f. In addition, when the said relationship cannot be maintained from the relationship of an equipment layout, you may adjust the angle which the cutoff surface 50f and the normal line of the injection surface 22 make so that it may become as parallel as possible with respect to a film conveyance direction.

As shown in FIG. 13, the scattering restriction member 50 includes scattering restriction plates 51 and 52 and fixed wall portions 53 and 54.
The scattering restricting plates 51 and 52 have a thickness in a direction (x direction) parallel to the normal line of the emission surface 22.
In the present embodiment, the thickness of the scattering restriction plates 51 and 52 is about 3 mm. Note that the thicknesses of the scattering restricting plates 51 and 52 may be set as necessary, as long as the first splash 4a and the second splash 4b can be blocked.

  The scattering restricting plates 51 and 52 have a rectangular shape having long sides in the film width direction (y direction shown in FIG. 13) and short sides in the film transport direction (z direction shown in FIG. 13). In the present embodiment, the length of the long sides of the scattering restriction plates 51 and 52 is about 1600 mm corresponding to the film width, and the length of the short sides of the scattering restriction plates 51 and 52 is about 50 mm.

  As shown in FIG. 14, the first scattering restriction plate 51 is disposed on one side across the ejection passage Ia through which the ink 4 i is ejected. The second scattering restriction plate 52 is disposed on the other side with the injection passage Ia interposed therebetween. The first scattering restriction plate 51 is disposed above the injection passage Ia in the vertical direction, and the second scattering restriction plate 52 is disposed below the injection passage Ia in the vertical direction. The 1st scattering control board 51 and the 2nd scattering control board 52 are arrange | positioned in the position adjacent on both sides of the injection path Ia. The first scattering restriction plate 51 is formed with a first blocking surface 51f that extends in a direction orthogonal to the normal line of the exit surface 22, and the second scattering restriction plate 52 extends in parallel with the first blocking surface 51f. A second blocking surface 52f is formed.

  As shown in FIG. 13, an interval s1 (hereinafter referred to as “slit interval”) at which the first scattering restriction plate 51 and the second scattering restriction plate 52 are separated is larger than the diameter d2 of the injection hole 21 (see FIG. 9). . For example, the slit interval s1 is preferably a value in the range of 2 mm to 10 mm, more preferably a value in the range of 2 mm to 5 mm. This is because if the slit interval s1 is too small, the ink 4i does not pass through the slit interval s1, that is, the ink 4i may touch the first scattering restriction plate 51 and the second scattering restriction plate 52. This is because if the size is too large, the first droplet 4a may spread over a wide range from the injection hole 21. In the present embodiment, the slit interval s1 is about 5 mm. 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 fixed wall portion 53 is formed integrally with the first scattering restriction 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 restricting plate 51, and is inclined so as to be positioned higher on the rear side (−x direction side). The side wall portion 53b of the first fixed wall portion 53 is integrally connected to the left and right side ends of the first scattering restricting plate 51 and the left and right side ends of the upper wall portion 53a, and is positioned higher on the rear side (−x direction side). After inclining like this, it bends and extends backward. Thereby, while improving the support rigidity of the 1st scattering control board 51, the movement to the upper direction and the left-right side of the 1st splash 4a can be controlled.

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

  The second fixed wall portion 54 includes a lower wall portion 54a and a side wall portion 54b. The second fixed wall portion 54 is formed integrally with the second scattering restriction 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 restriction plate 52 and extends rearward (−x direction). The side wall portion 54b of the second fixed wall portion 54 is integrally connected to the left and right side ends of the lower part of the second scattering restriction plate 52 and the left and right side ends of the lower wall portion 54a, and rearward until reaching the rear end of the lower wall portion 54a. Extend. Thereby, while improving the support rigidity of the 2nd scattering control board 52, the movement to the downward direction and the left-right side of the 1st splash 4a can be controlled.

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

  The blocking surface 50f on the optical film F10X side of the scattering regulating member 50 is separated from the optical film F10X. For example, the distance between the blocking surface 50f on the optical film F10X side of the scattering regulating member 50 and the optical film F10X (hereinafter referred to as “the distance between the blocking surface and the optical film”) is preferably a value of 10 mm or less, more preferably. The value is 1 mm or more and 5 mm or less. This is because if the distance between the blocking surface and the optical film is too small, the scattering restricting member 50 may come into contact with the optical film F10X. If the distance between the blocking surface and the optical film is too large, the scattering surface 50f causes the second This is because the movement of the splash 4b may not be regulated. In this embodiment, the distance between the blocking surface and the optical film is about 3 mm.

  The blocking surface 50 f on the emission surface 22 side of the scattering regulating member 50 is separated from the emission surface 22. For example, the distance between the blocking surface 50f on the injection surface 22 side of the scattering regulating member 50 and the injection surface 22 (hereinafter referred to as “distance between the blocking surface and the injection surface”) is a value of 3 mm or more. In the present embodiment, the distance between the blocking surface and the exit surface is about 10 mm. The reason for this is that if the distance between the blocking surface and the exit surface is too small, the movement of the second droplet 4b may not be restricted by the blocking surface 50f, and if the distance between the blocking surface and the exit surface is too large, the slit interval s1. This is because it is necessary to increase the size.

  For example, the scattering restriction 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 the present embodiment, the scattering restriction member 50 is formed of an acrylic plate. The scattering restricting member 50 may be formed of a plate material that does not react with ink. Thereby, since the 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.

  As described above, the marking device 4 according to this embodiment is a marking device 4 capable of marking the mark 12 by ejecting the ink 4i to the optical film F10X, and ejects the ink 4i to the optical film F10X. A droplet ejection device 20 having an ejection surface 22 in which an ejection hole 21 is formed, and a first that is provided between the ejection surface 22 and the optical film F10X and scatters when the ink 4i is ejected from the ejection hole 21. The splash restricting member 50 capable of blocking at least one of the splash 4a and the second splash 4b splashed when the ink 4i is landed on the optical film F10X. A blocking surface 50f extending in a direction perpendicular to the normal line is formed.

  According to this embodiment, when the ink 4i scatters between the ejection surface 22 and the optical film F10X when the ink 4i is ejected from the ejection hole 21, the ink 4i lands on the optical film F10X. By providing a scattering regulating member 50 capable of blocking at least one of the second splash 4b that scatters on the surface, and forming a blocking surface 50f extending in a direction perpendicular to the normal line of the emission surface 22 on the scattering regulating member 50, Compared to the case where the ink 4i is ejected as it is from the droplet ejection device 20 without providing the scattering restricting member 50, the first droplet 4a moves to the optical film F10X side between the ejection surface 22 and the optical film F10X. Since the second splash 4b can be restricted from moving to the ejection surface 22 side, the first splash 4a is ejected when the ink 4i is ejected from the ejection hole 21. Even if the second splash 4b is scattered when the ink 4i is landed on the optical film F10X, the first splash 4a and the second splash 4b adhere to an area other than the defective portion of the optical film F10X. It can be suppressed and the yield of products can be improved.

  Further, the scattering regulating member 50 includes the scattering regulating plates 51 and 52 having a thickness in a direction (x direction) parallel to the normal line of the emission surface 22, thereby adjusting the thickness of the scattering regulating plates 51 and 52. The rigidity of the splash restricting plates 51 and 52 can be improved, and the first splash 4a and the second splash 4b can be effectively blocked.

  Further, the scattering restriction member 50 includes a first scattering restriction plate 51 disposed on one side across the ejection passage Ia from which the ink 4i is ejected, and a second scattering restriction disposed on the other side across the ejection passage Ia. By providing the plate 52, the first splash 4a and the second splash 4b scattered on both sides across the injection passage Ia can be effectively blocked with a simple configuration.

  In addition, the first scattering restriction plate 51 is disposed above the injection passage Ia in the vertical direction, and the second scattering restriction plate 52 is disposed below the injection passage Ia in the vertical direction, thereby sandwiching the injection passage Ia. Thus, the first splash 4a and the second splash 4b scattered on the upper and lower sides can be effectively blocked with a simple configuration.

  Further, the first scattering restriction plate 51 is formed with a first blocking surface 51f extending in a direction orthogonal to the normal line of the emission surface 22, and the second scattering restriction plate 52 is parallel to the first blocking surface 51f. By forming the second blocking surface 52f that extends to the first blocking surface 51f and the second blocking surface 52f, the second blocking surface 52f is formed between the exit surface 22 and the optical film F10X compared to the case where the first blocking surface 51f and the second blocking surface 52f intersect each other. The movement of the one droplet 4a to the optical film F10X side and the movement of the second droplet 4b to the emission surface 22 side can be effectively regulated without shifting to any one regulation.

  Further, by making the slit interval s 1 larger than the diameter d 2 of the ejection hole 21, it is possible to avoid the ink 4 i from touching the first scattering restriction plate 51 and the second scattering restriction plate 52.

  In the above-described embodiment, the first scattering restriction plate 51 and the second scattering restriction plate 52 have been described as examples arranged on both sides of the injection passage Ia. However, the present invention is not limited to this. For example, the scattering restriction plate may be disposed only below the ejection passage Ia from which the ink 4i is ejected in the vertical direction. Thereby, compared with the case where the 1st scattering control board 51 and the 2nd scattering control board 52 are arrange | positioned on both sides on both sides of the injection path Ia, it aims at cost reduction as a simple structure by reducing the number of parts. At the same time, it is possible to selectively block the first splash 4a and the second splash 4b that are scattered below the injection passage Ia due to the influence of gravity. In particular, when the dot diameter is large (when the amount of droplets is large), when the optical film F10X is transported in the vertical direction, the amount of splashing downward increases, so the scattering restriction plate is disposed only below the injection path Ia. The actual profit to be increased.

  In addition, a shielding plate 30 provided on the ejection surface 22 and capable of blocking the splash 4a that is scattered when the ink 4i is ejected from the ejection hole 21 is further provided, and the shielding plate 30 is opened at a position facing the ejection hole 21. In addition, by forming the opening 31 having the inner wall surface 31a that blocks the splash 4a scattered in the direction intersecting with the normal line of the ejection surface 22, the ink 4i is directly supplied from the droplet ejection device 20 without providing the shielding plate 30. Compared to the case where the splash 4a is ejected, the diffusion range of the splash 4a that scatters in the direction intersecting with the normal line of the exit surface 22, more specifically, the splash 4a scattered around the mark 12 when attached to the optical film F10X. Since the diameter L2 (see FIG. 9) can be reduced, even if the droplet 4a is scattered when the ink 4i is ejected from the ejection hole 21, the droplet 4a adheres to an area other than the defective portion of the optical film F10X. To suppress the Rukoto, it is possible to improve the yield of the product.

  Moreover, since the diffusion range of the splash 4a can be adjusted by adjusting the thickness t1 of the shielding plate 30 by providing the shielding plate 30 having the thickness t1 in the direction parallel to the normal line of the emission surface 22, the splash 4a is optical. It can suppress adhering to area | regions other than the defective location of film F10X. For example, by increasing the thickness t1 of the shielding plate 30 as much as possible within a range where the shielding plate 30 does not contact the optical film F10X, the diffusion range of the splash 4a can be minimized.

  Further, by further including a fixing member 40 capable of fixing the shielding plate 30 to the droplet ejection device 20, the shielding plate 30 is firmly fixed to the droplet ejection device 20 as compared with the case where the fixing member 40 is not provided. It becomes easy.

  In addition, the fixing member 40 includes a first wall portion 41 that covers the side end portions 23 and 33 located in a direction orthogonal to the normal line of the emission surface 22 in both the ejection head 20A and the shielding plate 30, and the first of the shielding plate 30. The shielding plate 30 is firmly fixed to the ejection head 20A and includes the ejection head 20A and the shielding plate 30. Relative movement in the front-rear, left-right, up-down direction (xyz direction) can be restricted with a simple configuration.

  Further, the droplet ejection device 20 includes a plurality of ejection heads 20A capable of ejecting the ink 4i, a plurality of shielding plates 30 are provided for each of the plurality of ejection heads 20A, and a fixing member 40 attaches the shielding plates 30 to the plurality of ejection heads 20A. By providing a plurality of fixings for each, the shielding plate 30 and the fixing member 40 can be positioned in a one-to-one relationship with the individual ejection heads 20A. Therefore, the shielding plates and fixings having a size corresponding to the plurality of ejection heads 20A are fixed. Compared with the case where a member is provided, it can suppress that the relative position of 20 A of injection heads, the shielding board 30, and the fixing member 40 shift | deviates.

  Further, when the shielding plate 30 abuts on the emission surface 22, the relative movement of the ejection head 20 </ b> A and the shielding plate 30 in the front-rear direction (x direction) is restricted as compared with the case where the shielding plate 30 is separated from the emission surface 22. It becomes easy to do.

  Further, by making the diameter d 1 of the opening 31 larger than the diameter d 2 of the ejection hole 21, it is possible to avoid the ink 4 i ejected from the ejection hole 21 from touching the opening 31.

  The defect inspection system 10 according to the present embodiment includes a conveyance line 9 that conveys a long belt-shaped optical film F10X, a defect inspection apparatus 2 that performs defect inspection of the optical film F10X that is conveyed by the conveyance line 9, and defect inspection. And a marking device 4 capable of printing the mark 12 by ejecting the ink 4i to the position of the defect 11 based on the result.

  According to this embodiment, when the marking device 4 described above is provided, when the ink 4i is ejected from the ejection hole 21, the first splash 4a is scattered, or when the ink 4i is landed on the optical film F10X. Even if the second droplet 4b is scattered, the first droplet 4a and the second droplet 4b are prevented from adhering to a region other than the defective portion of the optical film F10X, and the product yield can be improved. it can. Further, since the mark 12 can be printed in accordance with the position of the defect by providing the marking device 4 that can print the mark 12 by ejecting the ink 4i to the position of the defect 11 based on the result of the defect inspection, the splash 4a , 4b can be effectively suppressed from adhering to a region other than the defective portion of the optical film F10X, and the yield of the product can be further improved.

  Further, the marking device 4 is transported in the horizontal direction by injecting the ink 4i from the horizontal direction perpendicular to the vertical direction to the optical film F10X transported in the direction parallel to the vertical direction on the transport line 9. Compared with the case where the ink 4i is ejected downward in the vertical direction with respect to the optical film F10X, the ink 4i can be prevented from dripping naturally from the ejection hole 21 due to the influence of gravity.

  The film manufacturing apparatus 1 according to this embodiment includes the defect inspection system 10 described above.

  According to this embodiment, by providing the defect inspection system 10 described above, when the ink 4i is ejected from the ejection hole 21, the first splash 4a is scattered, or when the ink 4i is landed on the optical film F10X. Even if the second droplet 4b is scattered, the first droplet 4a and the second droplet 4b are prevented from adhering to an area other than the defective portion of the optical film F10X, and the yield of the product is improved. Can do. In addition, by printing the mark 12 in accordance with the position of the defect, it is possible to effectively suppress the droplets 4a and 4b from adhering to an area other than the defective part of the optical film F10X, and to further improve the product yield. Can do.

  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 step, the first droplet 4a is scattered when the ink 4i is ejected from the ejection hole 21, or the first time when the ink 4i is landed on the optical film F10X. Even if the second droplet 4b is scattered, the first droplet 4a and the second droplet 4b can be prevented from adhering to a region other than the defective portion of the optical film F10X, and the yield of the product can be improved. . In addition, by printing the mark 12 in accordance with the position of the defect, it is possible to effectively suppress the droplets 4a and 4b from adhering to an area other than the defective part of the optical film F10X, and to further improve the product yield. Can do.

  By the way, as factors that splash when ink is ejected from the ejection hole, (A1) droplet amount, (A2) ink viscosity, and the like are conceivable.

Hereinafter, the above factors will be described.
If the amount of liquid droplets is very small, it is considered that there is little impact when the ink is ejected from the ejection holes, or even if the splashes are scattered, the optical film is contaminated. On the other hand, when the amount of liquid droplets is large, it has been clarified by the inventors that the droplets are scattered when the ink is ejected from the ejection holes and the scattered droplets contaminate the optical film.

For example, in a commercially available ink jet printer, the amount of droplets is about 1 × 10 ⁻⁶ μL, which is very small. Even when ink is ejected from the ejection holes, the droplets are hardly scattered or even if the droplets are scattered. It is thought that there is little influence so as to contaminate the optical film. On the other hand, in the droplet ejection device 20 according to the present embodiment, the droplet volume is about 0.166 μL, which is considerably larger than that of a commercially available inkjet printer, so that splashes are scattered when ink is ejected from the ejection holes. The scattered splashes may contaminate the optical film.

  Further, if the ink viscosity is large, it is considered that almost no splashes are scattered when ink is ejected from the ejection holes. On the other hand, when the ink viscosity is low, it has been clarified by the inventor's examination that splashes are scattered when the ink is ejected from the ejection holes, and the scattered splashes 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 ink viscosity is about 0.89 × 10 ⁻³ Pa · s, which is smaller than that of a commercially available inkjet printer, so that the ink is ejected from the ejection hole. In some cases, splashes may scatter, and the scatters may contaminate the optical film.

  According to the present embodiment, the position facing the injection hole 21 on the shielding plate 30 even when the droplets are scattered when the ink is injected from the injection hole due to the factors (A1), (A2), and the like. And an opening 31 having an inner wall surface 31a that blocks the splash 4a that scatters in a direction intersecting the normal line of the emission surface 22 is formed as it is from the droplet ejection device 20 without providing the shielding plate 30. Compared with the case of ejecting the ink 4i, the diffusion range of the splash 4a that scatters in the direction intersecting the normal of the ejection surface 22, specifically, the mark 12 when the splash 4a adheres to the optical film F10X is the center. Since the scattering diameter L2 (see FIG. 9) can be reduced, it is possible to effectively suppress the splash 4a from adhering to a region other than the defective portion of the optical film F10X, and further improve the product yield. It can be.

  On the other hand, the factors that cause splashes when ink lands on the optical film (print target) are (B1) dot diameter (droplet amount), (B2) ink viscosity, (B3) print target, and (B4) line. Speed can be considered.

Hereinafter, the above factors will be described.
If the dot diameter is extremely small (if the amount of droplets is very small), there will be little impact when ink lands on the print target, or even if the splash is scattered, there will be little impact on the print target. it is conceivable that. On the other hand, when the dot diameter is large (the amount of liquid droplets is large), it is clarified by the inventor that the splashes are scattered when the ink is landed on the print target, and the scattered splashes contaminate the print target. ing.

For example, in a commercially available inkjet printer, the dot diameter is as extremely small as about 20 μm, the amount of droplets is estimated to be about 1 × 10 ⁻⁶ μL, and when the ink lands on the print target, the droplets are hardly scattered or are splashed. Even if splatters are scattered, it is considered that the effect of contaminating the print 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. Since the diameter is quite large (because the amount of liquid droplets is quite large), when the ink hits the print target, the splash may be scattered, and the scattered splash may contaminate the print target.

  Further, if the ink viscosity is large, it is considered that the droplets hardly scatter when the ink lands on the object to be printed. On the other hand, when the ink viscosity is low, it has been clarified by the inventor's examination that the ink splashes when the ink lands on the object to be printed, and the splashed particles contaminate the object to be printed.

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 ink viscosity is about 0.89 × 10 ⁻³ Pa · s, which is smaller than that of a commercially available inkjet printer. In some cases, splashes may scatter and the splashes may contaminate the print target.

  Further, if the object to be printed is a paper medium such as recording paper, it is considered that the droplets hardly scatter when the ink lands on the object to be printed. On the other hand, when the printing target is an optical film containing PVA and TAC, it is clarified by the inventor's examination that when the ink lands on the printing target, the splashes are scattered and the scattered splashes contaminate the printing target. ing.

  For example, in a commercially available inkjet printer, the object to be printed 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 when ink lands on the printing target, splashes may be scattered, and the scattered splashes may contaminate the printing target.

  Further, if the line speed is low, it is considered that the ink hardly scatters when the ink lands on the print target. On the other hand, when the line speed is high, when the ink is landed on the print target, the splash is scattered over a wide range, and the inventor has revealed that the scattered spray contaminates the print target.

  For example, in a commercial inkjet printer, the line speed is as low as about 3 m / min. On the other hand, in this embodiment, the line speed is a value of 30 m / min or less, and the upper limit of the printable range of the mark 12 on the optical film F10X is 50 m / min or less and the upper limit is large. In some cases, splashes spread over a wide area, and the scattered splashes may contaminate the print target.

  Even when the ink is ejected from the ejection hole due to the factors (A1), (A2), etc., the ink is landed on the print target due to the factors (B1) to (B4). Even when the splashes are scattered when the ink 4i is ejected, according to the present embodiment, the first splashes that are scattered when the ink 4i is ejected from the ejection hole 21 between the ejection surface 22 and the optical film F10X. 4a and a scattering restricting member 50 capable of blocking at least one of the second splash 4b that scatters when the ink 4i lands on the optical film F10X are provided, and the scattering restricting member 50 is orthogonal to the normal line of the emission surface 22. By forming the blocking surface 50f that extends in the direction in which the ink is discharged, the ink 4i is ejected as it is from the droplet ejection device 20 without providing the scattering restricting member 50, and between the ejection surface 22 and the optical film F10X. first While restricting that the splash 4a moves to the optical film F10X side and restricting the movement of the second splash 4b to the exit surface 22 side, the first splash 4a and the second splash 4b It can suppress effectively adhering to areas other than a defective part of optical film F10X, and can improve the yield of a product further.

  Hereinafter, modifications of the embodiment will be described. In the following modifications, the same reference numerals are given to components common to the first embodiment, and detailed description thereof is omitted.

(First modification of fixing member)
FIG. 10 is a view showing a first modification of the fixing member, and is a cross-sectional view corresponding to FIG.
In the said embodiment, the example in which the fixing member 40 was formed with a member different from the shielding board 30 was 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 20 </ b> A together with the shielding 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 part 141 covers the side end part 23 located in the direction orthogonal to the normal line of the emission surface 22 in the injection head 20A. The side wall 141 has a rectangular cylindrical shape extending in the front-rear direction (x direction). The side wall 141 comes into contact with the portion on the injection surface 22 side in the side end 23 in the vertical direction (z direction) and the width direction (y direction) of the injection head 20A.

  The shielding plate 130 has a rectangular frame shape extending inward in the z direction from the front end (+ x direction end) of the side wall portion 141. The shielding plate 130 is formed with an opening 131 having an inner wall surface 131 a that opens at a position facing the injection hole 21 and blocks the splash 4 a that scatters in a direction intersecting the normal line of the emission surface 22. The shielding plate 130 contacts the emission surface 22. In other words, the second main surface 135 of the shielding plate 130 is arranged in the same plane as the emission surface 22.

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

  According to this modification, the fixing member 140 is formed integrally with the shielding plate 130 and includes the side wall portion 141 that covers the side end portion 23 located in the direction orthogonal to the normal line of the emission surface 22 of the ejection head 20A. The shielding plate 130 can be firmly fixed to the ejection head 20A, and the relative movement of the ejection head 20A and the shielding plate 130 in the front-rear, left-right, up-down directions (xyz directions) can be restricted with a simple configuration. Moreover, compared with the case where the fixing member 40 is formed by a member different from the shielding plate 30, the number of parts can be reduced, and the apparatus configuration can be simplified.

(Second modification of fixing member)
FIG. 11 is a view showing a second modification of the fixing member, and is a cross-sectional view corresponding to FIG.
In the first modified example, the example in which the shielding plate 130 is in contact with the emission surface 22 has been described. On the other hand, in the present modification, the shielding plate 130 is separated from the exit surface 22 as shown in FIG. Specifically, the second main surface 135 of the shielding plate 130 is disposed in front of the emission surface 22 (+ x direction).

According to this modification, since the diffusion range of the splash 4a can be adjusted by adjusting the distance between the shield plate 130 and the exit surface 22 by separating the shield plate 130 from the exit surface 22, the splash 4a is an optical film. It can suppress adhering to areas other than the defective part of F10X.
For example, by increasing the distance between the shielding plate 130 and the exit surface 22 as much as possible within a range where the shielding plate 130 does not contact the optical film F10X, the diffusion range of the splash 4a can be minimized. Compared with the case where the shielding plate 130 is in contact with the emission surface 22, the diffusion of the splash 4a can be achieved only by adjusting the distance between the shielding plate 130 and the emission surface 22 without adjusting the thickness t1 of the shielding plate 130. Since the range can be adjusted, the degree of freedom in design is improved.

(Modification of shielding member)
FIG. 12 is a view showing a modification of the shielding member, and is a cross-sectional view corresponding to FIG.
In the said embodiment, the example provided with the shielding board 30 which has thickness in the direction parallel to the normal line of the injection surface 22 as a shielding member was given. On the other hand, in this modification, as shown in FIG. 12, a cylindrical member 230 extending in a direction parallel to the normal line of the exit surface 22 is provided as a shielding member.

The cylindrical member 230 is formed with an opening 231 that opens at a position facing the injection hole 21.
As shown in FIG. 12, the opening 231 has an inner wall surface 231a facing the ejection passage Ia (see FIG. 9) through which ink is ejected. The inner wall surface 231 a of the opening 231 blocks the splash 4 a (see FIG. 9) that scatters in a direction that intersects the normal line of the ejection surface 22 when ink is ejected from the ejection hole 21.
The inner wall surface 231a of the opening 231 has a cylindrical shape with the injection path Ia as the central axis. The diameter of the opening 231 (the inner diameter of the cylindrical member 230) is larger than the diameter of the injection hole 21.
The cylindrical member 230 abuts on the emission surface 22. In other words, the end surface 235 (second main surface) of the cylindrical member 230 is disposed on the same plane as the emission surface 22.

  According to this modification, by providing the cylindrical member 230 extending in a direction parallel to the normal line of the emission surface 22, the length of the cylindrical member 230 (the length in the x direction) is adjusted so that the range of diffusion of the splashes 4a is achieved. Therefore, it is possible to suppress the splash 4a from adhering to a region other than the defective portion of the optical film F10X. For example, by increasing the length of the cylindrical member 230 as much as possible within a range where the cylindrical member 230 does not contact the optical film F10X, the diffusion range of the droplets 4a can be minimized.

  Further, by making the diameter of the opening 231 larger than the diameter of the ejection hole 21, it is possible to avoid the ink 4 i ejected from the ejection hole 21 from touching the opening 231.

(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 is a diagram for explaining the operation of the suction device 60 according to the second embodiment, including an enlarged view of a main part of FIG. For convenience, only the second suction mechanism 62 (lower suction mechanism) is shown in FIG. 15, and the first suction mechanism 61 and the second suction mechanism 62 are shown in FIG. In FIG. 15, for convenience, the optical film F10X is indicated by a two-dot chain line. Further, in FIG. 15 and FIG. 16, the illustration of the scattering restricting member 50 is omitted. In the present embodiment, components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first embodiment, as illustrated in FIG. 13, the marking device 4 includes an example of the droplet ejection device 20, the shielding plate 30, the fixing member 40, and the scattering restriction member 50. On the other hand, in this embodiment, as shown in FIG. 15, the marking device 204 further includes a suction device 60.

  As shown in FIG. 16, the suction device 60 is provided between the emission surface 22 and the optical film F10X. The suction device 60 sucks at least one of the first splash 4a that is scattered when the ink 4i is ejected from the ejection hole 21 and the second splash 4b that is scattered when the ink 4i is landed on the optical film F10X. To do.

As shown in FIG. 15, in the present embodiment, the suction device 60 includes a second suction mechanism 62.
The second suction mechanism 62 is disposed only below the ejection path Ia from which the ink 4i is ejected in the vertical direction. The second suction mechanism 62 is formed with a suction surface 62f that is inclined forward and upward so as to face the injection path Ia.

  The suction surface 62f of the second suction mechanism 62 is formed with a suction hole 62h for sucking the first droplet 4a and the second droplet 4b. The suction hole 62h extends longitudinally from the suction surface 62f along the width direction (y direction) of the suction surface 62f. In FIG. 15, as an example, the suction holes 62 h extending along the width direction (y direction) of the suction surface 62 f are illustrated, but the arrangement of the suction holes 62 h is not limited to this, and a plurality of suction holes include the suction surface 62 f. The suction holes 62h can be appropriately set as necessary, for example, by dividing the suction holes 62h in the width direction (y direction) of the suction surface 62f so as to be arranged in a line in the width direction (y direction).

  For example, the distance J1 between the suction surface 62f and the optical film F10X (hereinafter referred to as “distance between the suction surface and the optical film”) is set to a value of 10 mm or more. This is because if the suction surface / optical film distance J1 is too small, the suction surface 62f may come into contact with the optical film F10X. In the present embodiment, the distance J1 between the suction surface and the optical film is about 10 mm. The distance J1 between the suction surface and the optical film is a length of a line segment connecting 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 “distance between the suction surface and the fixing member”) is set to a value of 30 mm or more. This is because if the suction surface / fixing member distance J2 is too small, the suction surface 62f and the fixing member 40 may come into contact with each other. In this embodiment, the distance J2 between the suction surface and the fixing member is about 30 mm. The distance J2 between the suction surface and the fixing member is the length of a 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.

  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 injection hole”) is preferably a value of 50 mm or less, more preferably a value in the range of 15 mm or more and 50 mm or less. And In the present embodiment, the distance J3 between the suction holes and the injection holes is about 45 mm. The suction hole / injection hole distance J3 is the length of a line segment connecting the center of the suction hole 62h in the suction surface 62f and the center of the injection hole 21 in the injection surface 22.

For example, the length of the suction hole 62h is approximately the same as the length of the suction surface 62f in the width direction (y direction), specifically, the length of the second suction mechanism 62 is longer than the length of the suction surface 62f in the width direction (y direction). The length is reduced by the thickness of the left and right side walls. The length of the suction hole 62h is the length in 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 the present embodiment, the width of the suction hole 62h is about 10 mm. The width of the suction hole 62h is the length of the suction hole 62h in the short side direction (inclination direction of the suction surface 62f).

  For example, the wind speed (hereinafter referred to as “suction wind speed”) when sucking droplets through the suction holes 62h is preferably a value of 2 m / sec or more, more preferably a value in the range of 5 m / sec or more and 7 m / sec or less. To do. In the present embodiment, the suction wind speed is 6.4 m / sec. The suction wind speed is set to a value in the range of 4 m / sec or more and 20 m / sec or less as a range in which the ink 4i (main droplet, not splash) is not pulled.

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

  The second suction mechanism 62 has a shape extending obliquely forward and upward so that the suction surface 62f faces the injection path Ia. Specifically, the second suction mechanism 62 includes a rectangular suction surface 62f having a longitudinal length in the width direction (y direction), and a left and right trapezoidal shape that extends forward and upward with the left and right side edges of the suction surface 62f as the upper base. Side surface 64. A support shaft 65 is provided at the rear end portion (−x direction side end portion) of the second suction mechanism 62 so as to protrude in the left and right side directions (y direction) in parallel with the normal line of the left and right side surfaces 64.

  A support mechanism 73 capable of rotatably supporting the second suction mechanism 62 is provided on the left and right sides of the second suction mechanism 62. A stage 72 extending in the film width direction (y direction) is provided below the second suction mechanism 62. The support mechanism 73 includes a support base 73a fixed to the stage 72, a support plate 73b fixed to the support base 73a, and an upright piece extending upward from the widthwise inner end (+ y direction side end) of the support plate 73b. 73c.

  The standing piece 73c is formed with a long hole 73h that opens in the thickness direction (y direction) of the standing piece 73c and extends vertically. The support shaft 65 of the second suction mechanism 62 is inserted through the long hole 73h of the standing piece 73c. The size of the long hole 73h is such that the support shaft 65 can move up and down and can rotate around the axis of the support shaft 65. The support shaft 65 protrudes left and right from the upright piece 73c in a state of being inserted into the long hole 73h. The second suction mechanism 62 restricts the vertical movement and the rotation of the support shaft 65 around the axis by fixing the support shaft 65 to the upright piece 73c by a fixture (not shown). For example, the position of the second suction mechanism 62 may be regulated by forming a screw thread on the left and right ends of the support shaft 65 and screwing and tightening a nut or the like on the screw thread of the support shaft 65.

  Note that reference numeral 71 in the figure denotes a support base that supports the droplet ejection device 20. The support base 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 base 71 by a fastening member such as a bolt.

  According to this embodiment, when the ink 4i scatters between the ejection surface 22 and the optical film F10X when the ink 4i is ejected from the ejection hole 21, the ink 4i lands on the optical film F10X. By providing the suction device 60 capable of sucking at least one of the second splashes 4b scattered on the liquid droplets, the ink 4i is ejected as it is from the droplet ejection device 20 without providing the suction device 60. Since the first splash 4a and the second splash 4b scattered between the surface 22 and the optical film F10X can be sucked, the first splash 4a is scattered when the ink 4i is ejected from the ejection hole 21. Even if the second droplet 4b is scattered when the ink 4i is landed on the optical film F10X, the first droplet 4a and the second droplet 4b are other than the defective portion of the optical film F10X. Suppressed from adhering to the band, it is possible to improve the yield of products.

  Further, the second suction mechanism 62 is disposed only below the ejection passage Ia from which the ink 4i is ejected in the vertical direction, so that the suction mechanism is disposed on both sides of the ejection passage Ia. By reducing the number of parts, the cost can be reduced as a simple configuration, and the first droplet 4a and the second droplet 4b that are scattered below the injection passage Ia due to the influence of gravity can be selectively sucked. Can do. In particular, when the dot diameter is large (when the amount of droplets is large), when the optical film F10X is transported in the vertical direction, the amount of splashes that scatter downward is increased. (Practical benefit of being disposed only below the injection passage Ia) is increased.

  In the above-described embodiment, the second suction mechanism 62 has been described as being disposed only below the ejection passage Ia from which the ink 4i is ejected in the vertical direction. However, the present invention is not limited thereto. For example, as shown in FIG. 16, the suction device 60 is disposed on the other side with the first suction mechanism 61 disposed on one side across the ejection passage Ia from which the ink 4i is ejected and the ejection passage Ia. The second suction mechanism 62 may be provided. In other words, the suction mechanisms 61 and 62 may be arranged on both sides of the injection passage Ia. Thereby, the 1st droplet 4a and the 2nd droplet 4b which are scattered on both sides across the injection path Ia can be sucked effectively with a simple configuration.

  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 in the above embodiment) is disposed below the injection passage Ia in the vertical direction. It may be arranged. Thereby, the 1st splash 4a and the 2nd splash 4b which are scattered on both upper and lower sides on both sides of injection passage Ia can be sucked effectively by simple composition.

  The first suction mechanism 61 sucks the first droplet 4a and the second droplet 4b that scatter above the injection passage Ia, and the second suction mechanism 62 scatters the first droplet that scatters below the injection passage Ia. 4a and the second droplet 4b are sucked. The droplets sucked by the first suction mechanism 61 are transferred in the direction indicated by the arrow Q1 through the piping, and the droplets sucked by the second suction mechanism 62 are transferred in the direction indicated by the arrow Q2 through the piping and are not shown. Stored in tank.

(Third embodiment)
The configuration of the marking device according to the third embodiment of the present invention will be described below. FIG. 17 is a view showing a marking device 304 according to the third embodiment, and includes a cross section corresponding to FIG. In the present embodiment, components common to the first embodiment and the second modification of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first embodiment, as illustrated in FIG. 13, the marking device 4 includes an example of a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a scattering restriction member 50. In the second modification of the embodiment, as shown in FIG. 11, an example in which the shielding member 130 is separated from the emission surface 22 in a configuration in which the fixing member 140 is integrally formed by the same member as the shielding plate 130 is given. It was. On the other hand, in the present embodiment, as shown in FIG. 17, the marking device 304 includes a droplet ejection device 20, a fixing member 340, and a 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 20 </ b> A together with the shielding plate 330. The fixing member 340 includes a shielding plate 330 and a side wall portion 141. For example, the fixing member 140 is formed of a metal plate such as SUS.

  The shielding plate 330 is separated from the exit surface 22. Specifically, the second main surface 335 of the shielding plate 330 is disposed in front of the exit surface 22 (+ x direction). By separating the shielding plate 330 from the exit surface 22, the shielding plate 330 also functions as the above-described scattering restricting member. Specifically, by separating the shielding plate 330 from the emission surface 22, the first droplet 4 a moves to the optical film F 10 X side on the second main surface 335 (surface on the emission surface 22 side) of the shielding plate 330. The first main surface 332 (the surface on the optical film F10X side) of the shielding plate 330 regulates the movement of the second droplet 4b to the exit surface 22 side.

  A tapered portion 336 having an inclined surface 336 a that is inclined with respect to the normal line of the emission surface 22 so as to face the emission hole 21 is formed at the edge portion on the emission surface 22 side in the opening portion 331 of the shielding plate 330. Note that the edge on the exit surface 22 side of the opening 331 of the shielding plate 330 is a boundary between the inner wall surface 331 a of the opening 331 and the second main surface 335 of the shielding plate 330.

  In the present embodiment, a guide roll 7 in contact with the optical film F10X is provided. The droplet ejection device 20 according to the present embodiment is disposed to face the guide roll 7 with the optical film F10X interposed therebetween while the optical film F10X is being conveyed. The droplet ejection device 20 ejects the ink 4i (see FIG. 9) from the side opposite to the position in contact with the guide roll 7 of the optical film F10X.

  The optical film F <b> 10 </ b> X is preferably multiplied on the outer peripheral surface of the guide roll 7 within an angle range of 40 ° or more and 130 ° or less (hereinafter referred to as “holding angle θ”). The hugging angle is a value expressed by the central angle of the guide roll 7 in the angular range of the portion where the optical film F <b> 10 </ b> X contacts the outer peripheral surface of the guide roll 7 in the circumferential direction.

  The reason for this is that when the holding angle θ is less than 40 °, the optical film F10X can easily slide on the outer peripheral surface of the guide roll 7, and the optical film F10X may be scratched, and the holding angle θ is 130 °. This is because, for example, air bubbles are easily caught between the surface protective film and the polarizing film.

  Moreover, when the tension | tensile_strength concerning optical film F10X is small, it is preferable to make the holding angle (theta) into the value over 90 degrees, and it is more preferable to set it as 95 degrees or more. The smaller the tension applied to the optical film F10X, the easier the fluttering occurs. However, by setting the holding angle θ to 95 ° or more, even if the tension applied to the optical film F10X is small, the fluttering generated in the optical film F10X is reduced. Can be suppressed. 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 if the tension | tensile_strength concerning optical film F10X is large, it can suppress that optical film F10X adheres too much to the outer peripheral surface of the guide roll 7. FIG.

  In addition, the conveyance speed of the optical film F10X is a value in the range of usually 9 m / min or more and 50 m / min or less. Further, the tension applied to the optical film F10X is set to a value in the range of 400N to 1500N inside the drying furnace and a value in the range of 200N to 500N outside the drying furnace. The width of the optical film F10X is a value in the range of 500 mm to 1500 mm, and the thickness of the optical film F10X is a value in the range of 10 μm to 300 μm. As the width of the optical film F10X becomes larger and the thickness of the optical film F10X becomes thinner, fluttering easily occurs.

  For example, the outer diameter of the guide roll 7 is preferably set to a value in the range of 100 mm or more and 150 mm or less. The reason for this is that if the outer diameter of the guide roll 7 is increased, the area of the optical film F10X that comes into contact with the outer peripheral surface of the guide roll 7 with respect to the holding angle θ increases, so that the flutter generated in the optical film F10X can be suppressed. This is because, if the outer diameter of the guide roll 7 is too large, the optical film F10X is likely to have the above-described scratches, air bubbles, and the like.

  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. The reason for this is that the smaller the roundness of the guide roll 7, the more the vibration of the optical film F10X that contacts the guide roll 7 can be suppressed.

  For example, the surface roughness (maximum roughness Ry) on 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. The reason for this is that if the surface roughness (maximum roughness Ry) on the outer peripheral surface of the guide roll 7 is too large, the optical film F10X is liable to cause the above-described scratches, bubble entrapment, and the like.

  In addition, from the viewpoint of more effectively suppressing the flutter generated in the optical film F10X, a guide roll that contacts the optical film F10X may be additionally provided on the upstream side and the downstream side of the guide roll 7. Moreover, you may give the holding angle to the optical film F10X with respect to the guide roll to add.

The guide roll 7 can be advanced and retracted in a direction V2 that intersects the transport 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 movable in an oblique direction such as a front lower direction and a rear upper direction. Thereby, workability | operativity improvement can be aimed at from viewpoints, such as paper permeability, a joint line, and head beauty.
Specifically, from the viewpoint of paper passing properties, when the optical film F10 is transported (passed through) from the state where the optical film F10 is not transported (passed through) the transport line 9, the marking device 404 and the guide By increasing the distance to the roll 7, it means that workability is improved.
Next, it demonstrates from a viewpoint of a joint. When the raw fabric rolls R1 and R2 are replaced, a joint is formed when the optical film F10X is connected with a tape or the like. In the optical film F10X, the thickness of the seam portion is larger than the thickness of the normal portion (the thickness of the portion without the seam). Even in such a case, by making the guide roll 7 movable, contact between the joint portion and the marking device 304 can be avoided, and the optical film F10X can be transported to the transport line 9, thereby improving workability. Means improved.
The head beautification means cleaning of the head, and by making the guide roll 7 movable, the work space can be widened, so that workability can be improved.

  The droplet ejection device 20 may be capable of moving back and forth in a direction (for example, the front-rear direction) that intersects the transport direction V1 of the optical film F10X.

Reference numeral Va in FIG. 17 indicates a portion (hereinafter referred to as “opposing portion”) where the fixing member 340 and the guide roll 7 face each other, including the 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 across the facing portion Va, and a second suction mechanism 362 disposed on the other side across the facing portion Va. That is, the suction mechanisms 361 and 362 are arranged on both sides with the facing portion Va interposed therebetween. Specifically, the first suction mechanism 361 is disposed above the facing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the facing portion Va in the vertical direction.

  The first suction mechanism 361 is formed with a suction surface 361f inclined forward and downward so as to face the opposing portion Va. The second suction mechanism 362 is formed with a suction surface 362f that is inclined rearward and downward so as to face the facing portion Va. Each suction surface 361f, 362f is formed with a suction hole (not shown) for sucking the first droplet 4a and the second droplet 4b. Each suction mechanism 361, 362 is disposed so that each suction surface 361f, 362f enters a gap between the first main surface 332 of the shielding plate 330 and the optical film F10X in contact with the guide roll 7.

  According to the present embodiment, the tapered portion having the inclined surface 336 a that is inclined with respect to the normal line of the emission surface 22 so as to face the emission hole 21 at the edge of the opening 331 of the shielding plate 330 on the emission surface 22 side. By forming 336, since the first splash 4a can be received by the inclined surface 336a, the first splash 4a can be prevented from being split. If the tapered portion is not formed at the edge on the exit surface 22 side of the opening 331 of the shielding plate 330, a cross section is formed at the boundary between the inner wall surface 331 a of the opening 331 and the second main surface 335 of the shielding plate 330. Since a corner portion of about 90 ° is formed as viewed, there is a possibility that the first droplet 4a scattered when the ink 4i is ejected from the ejection hole 21 is split at the corner portion.

  Further, the suction device 360 includes a first suction mechanism 361 disposed on one side with the facing portion Va interposed therebetween, and a second suction mechanism 362 disposed on the other side with the facing portion Va disposed therebetween. The first splash 4a and the second splash 4b scattered on both sides with the portion Va interposed therebetween can be effectively sucked with a simple configuration.

  In addition, the first suction mechanism 361 is disposed above the facing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the facing portion Va in the vertical direction, so that the upper and lower sides sandwich the facing portion Va. The first droplet 4a and the second droplet 4b scattered on both sides can be effectively sucked with a simple configuration.

  Further, the suction mechanisms 361 and 362 are arranged so that the suction surfaces 361f and 362f enter the gap between the first main surface 332 of the shielding plate 330 and the optical film F10X in contact with the guide roll 7, so that suction is performed. Since the hole can be brought close to the injection path Ia, the first droplet 4a and the second droplet 4b scattered between the emission surface 22 and the optical film F10X can be effectively sucked. The second droplet 4b can be more effectively sucked by bringing the suction hole closer to the landing position of the ink 4i.

Moreover, while transporting the optical film F10X, the droplet ejection device 20 is disposed so as to oppose the guide roll 7 in contact with the optical film F10X with the optical film F10X interposed therebetween, thereby suppressing the flutter generated in the optical film F10X. In this state, the droplet ejection device 20 and the fixing member 340 can be arranged, so that the interval between the shielding plate 330 and the ejection surface 22 of the fixing member 340 is made as small as possible within a range where the shielding plate 330 does not contact the optical film F10X. Thus, the diffusion range of the droplets 4a can be minimized.
Further, the distance between the suction surfaces of the suction mechanisms 361 and 362 and the facing portion Va is made as small as possible within a range in which the suction mechanisms 361 and 362 do not suck the optical film F10X, thereby absorbing the droplets 4a and 4b to the maximum extent. be able to.
Even if the fixing member 340 (shielding plate 330) is not provided, the distance between the injection hole 21 of the injection head 20A and the optical film F10X can be set as much as possible as long as the emission surface 22 is not in contact with the optical film F10X. By making it smaller, the diffusion range of the splash 4a can be minimized.

  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 is disposed to face the guide roll 7 with the optical film F10X interposed therebetween, and guides the optical film F10X. Ink 4 i is ejected from the side opposite to the position in contact with the roll 7.

  According to the present embodiment, since the above-described guide roll 7 is further provided, the droplet ejection device 20 and the fixing member 340 can be arranged in a state in which the fluttering generated in the optical film F10X is suppressed. Therefore, the shielding plate of the fixing member 340 By reducing the distance between 330 and the emission surface 22 as much as possible within a range where the shielding plate 330 does not contact the optical film F10X, the diffusion range of the splashes 4a can be minimized.

  In this embodiment, the shielding plate 330 has a flat plate shape, that is, the first main surface 332 of the shielding plate 330 is described as an example parallel to the yz plane. However, the present invention is not limited to this. For example, a portion of the shielding plate facing the guide roll 7 is arcuate in section so as to be recessed on the opposite side of the guide roll 7, that is, a circle such that the first main surface of the shielding plate is along the outer peripheral surface of the guide roll 7. It is good also as an arc-shaped surface. Thereby, since the space | interval of a shielding board and optical film F10X can be made still smaller compared with the case where the shielding board 330 is made into flat form, the spreading | diffusion range of the droplet 4a can be made more effective. it can.

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

In the above embodiment, the marking device has been described with an example in which the ink 4i is ejected from the direction perpendicular to the vertical direction with respect to the optical film F10X conveyed in the horizontal direction parallel to the vertical direction on the conveyance line 9. Not limited to. For example, the marking device may eject the ink 4i from below on the optical film F10X conveyed in the horizontal direction. Even in this case, the ink 4i is prevented from dripping naturally from the ejection holes 21 due to the influence of gravity, compared to the case where the marking device ejects the ink 4i from above on the optical film F10X conveyed in the horizontal direction. can do.
Moreover, although the said embodiment demonstrated and demonstrated the example in which a scattering control board and a suction mechanism are arrange | positioned on both sides on both sides of the injection path Ia in which the ink 4i is injected from a marking apparatus, it does not restrict to this.
For example, when the splash of the ink 4i is concentrated on one side across the ejection path Ia due to the direction of the wind generated by the conveyance of the optical film F10X or the direction of the ejection path Ia of the ink 4i, the scattering restriction is limited to only one side. A plate or a suction mechanism may be arranged.
In the above embodiment, in the liquid droplet ejection apparatus as shown in FIG. 7 and the like, a configuration in which a plurality of ejection heads having a plurality of ejection holes are arranged so as to cover the print range in the width direction of the optical film F10X is taken as an example. However, the present invention is not limited to this. For example, a liquid droplet ejection apparatus having a single ejection head having 1 to 3 ejection holes moves in the width direction and the conveyance direction of the optical film F10X in accordance with the defect position information from the control apparatus, whereby the optical film F10X. The ink 4i may be ejected and printed on the upper defect position. In addition, the scattering restricting plate and the suction mechanism may move to the defect position together with the liquid droplet ejecting device to prevent the optical film F10X from being contaminated by the splash of the ink 4i.

  Moreover, although the said defect inspection system 10 gave and demonstrated the structure provided in a part of film manufacturing apparatus 1 as an example, it is not restricted to this. The defect inspection system 10 may be provided independently of the film manufacturing apparatus 1. For example, after the film manufacturing apparatus 1 does not include the defect inspection system 10 and the optical film F10X manufactured in the film manufacturing apparatus 1 is wound around the core as the raw roll R2 of the optical film F10X by the winding unit 8. The defect inspection system 10 may be provided in a part of the equipment in the next process.

  The film to which the present invention is applied is not necessarily limited to the optical film such as the polarizing film, the retardation film and the brightness enhancement film described above, and the present invention is applied to a film on which printing is performed by a marking device. It can be applied widely.

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

DESCRIPTION OF SYMBOLS 1 ... Film manufacturing apparatus 2 ... Defect inspection apparatus 4,204,304 ... Marking apparatus 4
a ... spray 4b ... spray 7 ... guide roll 9 ... conveying line 10,310 ... defect inspection system 11 ... defect 12 ... information 20 ... droplet ejection device 20A ... injection head 21 ... injection hole 22 ... ejection surface 23 ... droplet ejection Side end portions 30, 130, 230, 330 ... shielding members, shielding plates 31, 131, 231, 331 ... openings 31a, 131a, 231a
331a ... Inner wall surface 32,332 ... first main surface (surface opposite to the exit surface of the shielding plate) 33
... Side end 34 of shielding plate ... Outer edge 40,140,340 of shielding plate ... Fixing member 41 ... First wall portion 42 ... Second wall portion 141,341 ... Side wall portion 230 ... Cylinder member 436
... Tapered portion 336a ... Inclined surface d1 ... Diameter of opening d2 ... Diameter of injection hole F10X ...
Optical film

Claims (13)

A marking device capable of marking information by ejecting droplets onto an optical film,
A droplet ejection device having an ejection surface in which ejection holes for ejecting the droplets are formed on the optical film;
A scattering restriction member provided between the emission surface and the optical film, and capable of blocking splashes that are scattered before the droplets are ejected from the ejection holes until landing on the optical film,
A marking device in which the scattering restricting member is formed with a blocking surface extending in a direction intersecting with a normal line of the emission surface.   The splash includes at least one of a first splash that scatters when the droplet is ejected from the ejection hole and a second splash that scatters when the droplet lands on the optical film. Item 2. The marking device according to Item 1.   The marking device according to claim 1, wherein the scattering restriction member includes a scattering restriction plate having a thickness in a direction parallel to a normal line of the emission surface.   The scattering restriction plate includes a first scattering restriction plate disposed on one side across an ejection passage through which the droplets are ejected, and a second scattering restriction plate disposed on the other side across the ejection passage. The marking device according to claim 3, comprising at least one. The injection path is along a direction intersecting the vertical direction,
The first scattering restriction plate is disposed above the injection passage in the vertical direction,
The marking device according to claim 4, wherein the second scattering restriction plate is arranged below the injection passage in the vertical direction. The first scattering restriction plate is formed with a first blocking surface that extends in a direction intersecting with the normal of the emission surface,
The marking device according to claim 4 or 5, wherein a second blocking surface that extends parallel to the first blocking surface is formed on the second scattering restriction plate.   The marking device according to any one of claims 4 to 6, wherein an interval between the first scattering restriction plate and the second scattering restriction plate is larger than a diameter of the injection hole.   The marking device according to claim 5, wherein the scattering restriction plate is only the second scattering restriction plate. Further provided with a shielding member provided on the emission surface, capable of blocking off splashes scattered when the droplets are ejected from the ejection holes;
The opening part which has the inner wall face which shields the said splash splashing in the direction which cross | intersects the normal line of the said injection | emission surface is formed in the said shielding member while opening in the position facing the said injection hole. The marking device according to any one of the above.   The apparatus further comprises a suction device that is provided between the emission surface and the optical film, and is capable of sucking splashes that are scattered from when the liquid droplets are ejected from the ejection holes until landing on the optical film. 10. The marking device according to any one of up to 9.   The liquid droplet ejection device is disposed so as to face a guide roll in contact with the optical film with the optical film sandwiched between the optical film and the guide roll of the optical film in contact with the long belt-shaped optical film. The marking device according to any one of claims 1 to 10, wherein the droplet is ejected from a side opposite to a position. A transport line for transporting a long belt-shaped film;
A defect inspection apparatus for inspecting defects of the film conveyed in the conveyance line;
A defect inspection system comprising: the marking device according to any one of claims 1 to 11, wherein information can be marked by ejecting a droplet at a defect position based on a result of the defect inspection.   The film manufacturing method including the process of marking using the defect inspection system of Claim 12.

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