TW201843435A - Marking apparatus, defect inspection system and film manufacturing method - Google Patents

Abstract

An objective of the present invention is to provide a marking apparatus capable of suppressing adhesion of splashes to areas other than a defective portion of a film and improving the yield rate of products, even when splashes scatter from a time when a droplet is ejected through an ejection hole to a time when the droplet is landed onto an optical film. A marking apparatus is capable of marking information by ejecting a droplet onto an optical film, the marking device including: a droplet ejection device having an ejection surface in which an ejection hole for ejecting the droplet onto the optical film is formed, and a scattering regulating member which is provided between the ejection surface and the optical film and is capable of blocking splashes from scattering from a time when the droplet is ejected through the ejection hole to a time when the droplet is landed onto the optical film, wherein a blocking surface extending in a direction intersecting the normal line of the ejection surface is formed in the scattering regulating member.

Description

   Marking device, defect inspection system and film manufacturing device   

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

For example, an optical film such as a polarizing film is wound around a core material after a defect inspection such as a foreign object defect or a concave-convex defect is performed. Information about the location or type of the defect (hereinafter referred to as "defect information") is to print a bar code on the end in the width direction of the optical film, or to mark the defective part, thereby recording it in the optical membrane. The optical film wound around the core material is cut off from the upstream optical film when the winding amount reaches a certain amount, and is shipped as an original fabric roll. Moreover, the optical film is cut out based on the mark which has been applied to a defect part, and a sheet | seat (product) is taken out by this.

For example, Patent Document 1 has disclosed a defect marking device that can detect a part of a defect of a sheet-shaped product having a certain width and conveyed in a length direction perpendicular to the width direction while clearly showing a part of the detected defect. Gives scars for marking. On the other hand, in Patent Document 2, a non-contact printing method such as inkjet has been exemplified as a marking means.

    [Prior technical literature]         [Patent Literature]    

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-303580

Patent Document 2: Japanese Patent Application Laid-Open No. 2011-102985

In the case of the applicant of this case, the development of a marking device capable of marking information by ejecting liquid droplets to an optical film has also been advanced. The marking device includes a droplet ejection device having an ejection surface formed with an ejection hole from which an optical film is ejected. From the review by the present inventors, it is known that in such a marking device, in addition to the characteristics of the size and viscosity of the liquid droplets emitted from the injection holes, it is also due to the handling of the printing object and the optical film emitted by the liquid droplets. The speed and the like cause the droplets to scatter after the liquid droplets are ejected from the injection holes until they drop on the optical film. When the scattered droplets adhere to areas other than the defective part of the optical film, the part that should have been taken out as a product will be contaminated by the droplets. Sometimes the contaminated part must be discarded as a defective product, and There is a possibility that the yield of the product is reduced.

The present invention has been developed in view of the above-mentioned circumstances, and provides a method for preventing droplets from adhering to areas other than the defect portion of the film even when droplets have scattered after the droplets have been ejected from the injection hole until they are dropped on the optical film. Area, a marking device, a defect inspection system, and a film manufacturing method that can improve the yield of a product.

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

(1) A marking device according to one aspect of the present invention is capable of marking information by ejecting liquid droplets onto an optical film, and the marking device includes a droplet ejecting device having a structure for ejecting the liquid droplets onto the optical film. An emission surface of the injection hole; and a scattering restricting member, which is provided between the emission surface and the optical film, and can block the droplets that are scattered after the liquid droplet is ejected from the injection hole until it drops on the optical film; The scattering restriction member is formed with a blocking surface extending in a direction intersecting with a normal line of the emission surface.

(2) The marking device according to the above (1), wherein the droplet may include a first droplet scattered when the droplet is ejected from the injection hole, and a droplet scattered when the droplet is dropped on the optical film. At least one of the second droplets.

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

(4) The marking device according to the above (3), wherein the scattering-restricting plate may further include a first scattering-restricting plate disposed on one side via an ejection path through which the liquid droplets are ejected, and the ejecting path may be interposed therebetween. At least one of the second scattering limit plates is disposed on the other side.

(5) The marking device according to the above (4), wherein the ejection path may also extend in a direction crossing the vertical direction; the first scattering limit plate may be disposed in the vertical direction more than the ejection path. Upper; the second scattering limit plate may be disposed in a vertical direction below the ejection path.

(6) The marking device according to any one of (4) to (5), in the first scattering restriction plate, a first block extending in a direction crossing the normal line of the exit surface may be formed. A second blocking surface may be formed on the second scattering limit plate and extending parallel to the first blocking surface.

(7) The marking device according to any one of (4) to (6) above, wherein a separation distance between the first scattering limit plate and the second scattering limit plate may be larger than a diameter of the injection hole. Big.

(8) The marking device according to the above (5), wherein the scattering limit plate may be only a second scattering limit plate.

(9) The marking device according to any one of (1) to (8), further including: a shielding member, which is provided on the ejection surface and can block the droplets from being ejected from the ejection hole Scattered droplets; an opening may be formed in the shielding member, the opening is formed at a position opposite to the injection hole, and has a shield for the droplet that is scattered in a direction that intersects with the normal of the emission surface Inner wall surface.

(10) The marking device according to the above (9), wherein a diameter of the opening portion may be larger than a diameter of the injection hole.

(11) The marking device according to the above (9) or (10), wherein the edge portion on the side of the exit surface in the opening portion may be formed with a cone having an inclined surface facing the exit hole. Shape (taper).

(12) The marking device according to (1) or (11) above, may further include: a suction device provided between the exit surface and the optical film, capable of attracting the liquid droplets from the exit holes to The droplets scattered until the optical film is dropped.

(13) The marking device according to the above (12), wherein the suction device may further include a first suction mechanism disposed on one side via an ejection path through which the liquid droplets are ejected, and disposed through the ejection path. At least one of the second attraction mechanisms on the other side.

(14) The marking device according to the above (13), wherein the ejection path may also extend in a direction crossing the vertical direction; the first suction mechanism may be disposed above the ejection path in a vertical direction. ; The second suction mechanism may be arranged below the injection path in the vertical direction.

(15) The marking device according to the above (14), wherein the suction device may be only a second suction mechanism.

(16) The marking device according to any one of the above (1) to (15), wherein the droplet ejection device may be disposed so as to transport the optical film in a long strip shape through the optical The film is opposed to a guide roller that is in contact with the optical film, and the droplets are ejected from a side opposite to a position where the optical film is in contact with the guide roller.

(17) A defect inspection system according to one aspect of the present invention includes: a conveying line that conveys a long strip-shaped film; a defect inspection device that performs defect inspection of the film conveyed on the conveying line; and the above. The marking device described in any one of (1) to (16) is capable of marking information by ejecting liquid droplets on the position of a defect based on the result of the aforementioned defect inspection.

(18) The defect inspection system according to the above (17), wherein the marking device may eject the liquid droplets from a direction crossing the vertical direction toward a film transported on the transportation line in a direction parallel to the vertical direction .

(19) The defect inspection system according to the above (17), wherein the marking device may eject the liquid droplets upward in a vertical direction toward a film transported on the transport line in a direction crossing the vertical direction.

(20) The defect inspection system according to any one of (17) to (19) above, which may be further provided with a guide roller in contact with the film; the marking device may be arranged to face each other across the film. The droplet is ejected from the guide roller and from a side opposite to a position where the film contacts the guide roller.

(21) The defect inspection system according to the above (20), wherein the film may be hung around the outer peripheral surface of the guide roller within an angle range of 40 ° or more and 130 ° or less.

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

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

According to the present invention, even when droplets are scattered after a droplet is ejected from an ejection hole until it is dropped on an optical film, it is possible to suppress the droplets from adhering to a region other than the defect portion of the film, and to improve the Yield marking device, defect inspection system, and film manufacturing method.

1‧‧‧ film manufacturing equipment

2‧‧‧ Defect inspection device

3‧‧‧ Defect information reading device

4, 204, 304‧‧‧ marking device

4a‧‧‧Foam (the first droplet)

4b‧‧‧ Droplet (Second Droplet)

4i‧‧‧ ink

5a, 5b ‧‧‧ pinch roller

6‧‧‧Control device

7‧‧‧Guide roller

9‧‧‧ handling line

10, 310‧‧‧ Defect inspection system

11‧‧‧ defects

12‧‧‧ Information

13‧‧‧ Defective

14‧‧‧Good quality

20‧‧‧ droplet ejection device

20A‧‧‧shot head

21‧‧‧ injection hole

22‧‧‧ shoot out

23‧‧‧ side end of droplet ejection device

30, 130, 230, 330‧‧‧ Shielding member (shielding plate)

31, 131, 231, 331‧‧‧ openings

31a, 131a, 231a, 331a

32, 332‧‧‧first principal surface (the surface of the shielding plate opposite to the emission surface)

33‧‧‧Side end of shield

34‧‧‧ Outer edge of shield

35‧‧‧Second main surface (surface on the exit side of the shielding plate)

40, 140, 340‧‧‧Fixed components

41‧‧‧First wall

42‧‧‧Second wall section

50‧‧‧Scattering restriction member

50f‧‧‧ blocking surface

51‧‧‧The first flying limit board

51f‧‧‧First blocking surface

52‧‧‧Second Scatter Restriction Plate

52f‧‧‧Second blocking surface

53‧‧‧First fixed wall

53a‧‧‧upper wall

53b, 54b‧‧‧ sidewall

54‧‧‧Second fixed wall

54a‧‧‧ lower wall

60、360‧‧‧Attraction device

61, 361‧‧‧The first attraction

62, 362‧‧‧Second Attraction Agency

62f, 361f, 362f

62h‧‧‧Attraction hole

64‧‧‧ Left and right sides

65‧‧‧ support shaft

72‧‧‧ carrier

73‧‧‧ support

71, 73a‧‧‧Support

73b‧‧‧ support plate

73c‧‧‧Erected

73h‧‧‧long hole

135‧‧‧Second main face

141, 341‧‧‧ side wall part of fixing member

230‧‧‧ tube member

335‧‧‧Second Major Face

336‧‧‧Tapered

336a‧‧‧inclined

d1‧‧‧diameter of opening

d2‧‧‧diameter of injection hole

F1X, F10X‧‧‧Optical Film

F4‧‧‧ substrate

F4a‧‧‧Polarizer

F4b, F4c‧‧‧protective film

F5‧‧‧Adhesive layer

F6‧‧‧ spacer

F7‧‧‧Surface protection sheet

F8‧‧‧Fit

F11‧‧‧The first optical film

F12‧‧‧Second Optical Film

F13‧‧‧The third optical film

FX‧‧‧ Optical Sheet

G‧‧‧Frame section

Ia‧‧‧ Injection path

J1‧‧‧Distance between attractive surface and optical film

J2‧‧‧Distance between suction surface and fixed member

J3‧‧‧Distance between suction hole and injection hole

K1‧‧‧ The distance between the exit hole of the head and the optical film

L1‧‧‧The distance between the first main surface of the shielding plate and the optical film

L2‧‧‧Scatter diameter

MA‧‧‧Area

P‧‧‧LCD display surface

P1‧‧‧First substrate

P2‧‧‧Second substrate

P3‧‧‧LCD layer

P4‧‧‧display area

R1, R2‧‧‧‧ Raw rolls

Ry‧‧‧Maximum roughness

s1‧‧‧Slit interval

t1‧‧‧thickness

V1‧‧‧ Optical film handling direction

V2‧‧‧ Intersects with the transport direction of the optical film

Va‧‧‧ facing part

θ‧‧‧Wrapping angle

FIG. 1 is a plan view showing an example of a liquid crystal display panel.

Fig. 2 is a sectional view taken along the line II-II in Fig. 1.

FIG. 3 is a cross-sectional view showing an example of an optical film.

Fig. 4 is a side view showing the configuration of the film manufacturing apparatus of the first embodiment.

Fig. 5 is a perspective view showing a production step.

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

Fig. 7 is a front view showing the droplet ejection device, the shielding plate, and the fixing member in the marking device according to the first embodiment.

Fig. 8 is a sectional view taken along the line VIII-VIII in Fig. 7.

Fig. 9 is an enlarged view of a main part of Fig. 8 and is a schematic diagram for explaining the function of the shielding plate of the first embodiment.

FIG. 10 is a schematic view showing a first modified example of the fixing member, and is a cross-sectional view corresponding to FIG. 8.

FIG. 11 is a schematic view showing a second modification of the fixing member, and is a cross-sectional view corresponding to FIG. 8.

FIG. 12 is a schematic view showing a modified example of the shielding member, and is a cross-sectional view corresponding to FIG. 8.

Fig. 13 is a perspective view showing a marking device according to the first embodiment.

Fig. 14 is an enlarged view including the main part of Fig. 13 and is a diagram for explaining the function of the scattering restricting member in the marking device of the first embodiment.

Fig. 15 is a perspective view showing a marking device according to a second embodiment.

Fig. 16 is a schematic diagram for explaining the operation of the suction device in the marking device of the second embodiment.

FIG. 17 is a schematic view showing a marking device according to a third embodiment, and is a schematic view including a cross section corresponding to FIG. 8.

[First embodiment]

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

In the present embodiment, a production system of an optical display device will be described with reference to a film production apparatus and a film production method using the film production apparatus.

The film manufacturing device is used to manufacture a film-like optical member (optical film) made of resin. Examples of the optical film system include a polarizing film, a retardation film, and a brightness enhancement film. For example, the optical film is bonded to a panel-shaped optical display component (optical display panel) such as a liquid crystal display panel (panel) and an organic EL electro luminescence display panel. The film production apparatus constitutes a part of a production system for producing an optical display device including such an optical display part or an optical member.

In this embodiment, a transmissive liquid crystal display device is exemplified as the optical display device. The transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, the illumination light emitted from the backlight is incident from the back side of the liquid crystal display panel, and the light modulated by the liquid crystal display panel is emitted from the front side of the liquid crystal display panel, thereby enabling the Display the image.

(Optical display device)

First, the configuration of the liquid crystal display surface P shown in FIG. 1 and FIG. 2 will be described for the optical display device. FIG. 1 is a plan view showing an example of the liquid crystal display panel P. Fig. 2 is a sectional view taken along the line II-II in Fig. 1. It should be noted that the hatching showing the cross section is omitted in FIG. 2.

As shown in FIGS. 1 and 2, the liquid crystal display panel P includes: a first substrate P1; a second substrate P2 is disposed opposite to the first substrate P1; and a liquid crystal layer P3 is disposed on the first substrate Between P1 and the second substrate P2.

The first substrate P1 is composed of a transparent substrate formed in a rectangular shape in a plan view. The second substrate P2 is composed of a rectangular transparent substrate formed smaller than the first substrate P1. The liquid crystal layer P3 is formed by sealing the periphery between the first substrate P1 and the second substrate P2 with a sealing material (not shown), and is disposed inside a region formed in a rectangular shape in a plan view surrounded by the sealing material. In the liquid crystal display panel P, a region surrounded by the inner side of the outer periphery of the liquid crystal layer P3 in a plan view is referred to as a display region P4, and a region outside the periphery of the display region P4 is referred to as a frame portion G.

On the rear surface (backlight source 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 are laminated and laminated in this order. . A second optical film F12 as a polarizing film is bonded to the surface (display surface side) of the liquid crystal display panel P. Hereinafter, a film including any 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. It should be noted that in FIG. 3, the hatching showing the cross-section is omitted.

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

When the base material sheet F4 is, for example, a polarizing film, it has a structure in which a pair of protective films F4b and F4c sandwich a polarizer F4a. The adhesive layer F5 adheres the base material sheet F4 to the liquid crystal display panel P. The spacer F6 is a protective adhesive layer F5. The spacer F6 can be peeled from the adhesive layer F5 of the optical film F1X before the base material sheet F4 is bonded to the liquid crystal display panel P via the adhesive layer F5. In addition, the part after removing the spacer F6 from the optical film F1X is made into the bonding sheet F8.

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

In addition, regarding the base material sheet F4, any one of the pair of protective films F4b and F4c may be omitted. For example, the protective film F4b on the side of the adhesive layer F5 may be omitted, and the polarizer F4a may be directly provided with the adhesive layer F5. In addition, the protective film F4c on the surface protective sheet F7 side may be subjected to, for example, a hard film treatment to protect the outermost surface of the liquid crystal display panel P, or an antiglare treatment to obtain an antiglare effect. deal with. The base material sheet F4 is not limited to the above-mentioned laminated structure, and may be a single-layer structure. The surface protection sheet F7 may be omitted.

(Film manufacturing apparatus and method)

Next, the film manufacturing apparatus 1 shown in FIG. 4 is demonstrated. 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 on both sides of a polarizing film. The film manufacturing method includes the manufacturing steps of the optical film F10X. For example, the film manufacturing method includes: a raw material roll manufacturing step, which is a raw material roll (not shown) for manufacturing a long strip-shaped polarizing film; and a laminating step, which applies a long strip-shaped surface protective film to a long strip The strip-shaped polarizing film is used to make a raw roll R1 of the strip-shaped optical film F10X; and the marking step is to mark the position of the defect based on the result of the defect inspection of the strip-shaped optical film F10X. Furthermore, after the marking step, a production step is performed in which the marked portion is removed as a defective product, and the unmarked portion is recovered as a good product.

For example, in the manufacturing process of the raw material roll, after applying a dyeing treatment, a crosslinking treatment, and an extension treatment to a film that is a substrate of a polarizer such as PVA (Polyvinyl Alcohol; polyvinyl alcohol), the application A protective film such as TAC (Triacetylcellulose) is laminated on both sides of the treated film to produce a long polarized film, and the obtained polarized film is wound around a core material to obtain the polarized film. Raw material roll (not shown).

In the bonding step, the long polarized film and the long polarized film are rolled from the raw material roll of the long polarized film and the raw roll of the long surface protective film (both not shown). The surface protective film is unwound separately, while being clamped and pulled out with a nip roll or the like to produce a long strip-shaped optical film F10X, and the manufactured optical film F10X It wound on the core material, and obtained the raw material roll F10X. For example, PET (Polyethylene terephthalate) is used as the surface protective film.

In the marking step, the ink 4i (droplet) is ejected to the position of the defect based on the result of the defect inspection, thereby marking the information on the optical film F10X. Here, "ejection" means, for example, that the ink 4i is emitted from the ejection hole 21 shown in Fig. 6. In the marking step, a dot-shaped mark larger than the defect is printed (marked) on the defect part of the optical film F10X, thereby directly recording the defect part.

Fig. 5 is a perspective view showing a production step.

As shown in FIG. 5, in the production step, a plurality of sheets (products) are obtained from the long strip-shaped optical film F10X. In the vicinity of the defect 11 in the optical film F10X, a dot mark 12 larger than the defect 11 is printed. The region MA in the optical film F10X is a region obtained by applying a mark (hereinafter referred to as a "full width mark") to the entire film width direction. For example, the full-width marking is performed when a defect or the like occurs in a predetermined area of the optical film F10X.

The production step includes a cutting step of cutting the optical film F10X based on the information on the mark. In the cutting step, the optical film F10X is cut out based on the marked information, thereby taking out a sheet (product). In the production step, the marked part is removed as a defective product 13, and the unmarked part is collected as a good product 14.

As shown in FIG. 4, the film production apparatus 1 includes a transport line 9. The conveying line 9 forms a conveying path for conveying the long strip-shaped optical film F10X unwound from the raw material roll R1. The optical film F10X is subjected to a predetermined process such as defect inspection and marking, and is wound around a core material in a winding unit 8 as a raw material roll R2 after the predetermined process.

A pair of nip rollers 5a and 5b are arranged on the transport line 9. Furthermore, an accumulator (not shown) including a plurality of tension rolls (not shown) and a guide roller 7 (see FIG. 17) may be disposed on the transport line 9.

The pair of nip rollers 5a and 5b rotate the counter-rotating directions while holding the optical film F10X therebetween, thereby pulling out the optical film in the direction of the arrow V1 (the transport direction of the optical film F10X) shown in FIG. 4. F10X.

The accumulator (not shown) is used to absorb the difference caused by the variation of the feed amount of the optical film F10X, and to reduce the variation of the tension applied to the optical film F10X. For example, the accumulator has a configuration in which a plurality of tension adjusting rollers positioned on the upper side and a plurality of tension adjusting rollers positioned on the lower side are alternately arranged in a predetermined section of the conveying line 9.

In the accumulator, in a state where the optical film F10X is alternately hung on the upper tension adjusting roller and the lower tension adjusting roller, while the optical film F10X is being carried, the upper tension adjusting roller and the lower side The tension-adjusting rollers are relatively moved upwards and downwards. Thereby, the optical film F10X can be accumulated without stopping the conveyance line 9. For example, in the accumulator, it is possible to increase the accumulation of the optical film F10X by widening the distance between the tension adjustment roller on the upper side and the tension adjustment roller on the lower side. Adjust the distance between the adjustment roller and the tension adjustment roller on the lower side to reduce the accumulation of the optical film F10X. The accumulator is operated when, for example, the core material of the raw material rolls R1 and R2 is exchanged and then splicing is performed.

The guide roller 7 (refer to FIG. 17) guides the optical film F10X pulled out by the nip rollers 5 a and 5 b to the downstream side of the conveyance line 9 while rotating. The guide rollers 7 are not limited to one, and a plurality of guide rollers 7 may be arranged.

The optical film F10X is wound around the core material in the winding unit 8 as a raw material roll R2 after a predetermined process, and then fed to the next step (see FIG. 5).

(Defect inspection system)

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

As shown in FIG. 4, the defect inspection system 10 includes a transport 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 device 2 performs defect inspection of the optical film F10X. Specifically, the defect inspection device 2 detects various defects such as a foreign object defect, a bump defect, a bright spot defect, and the like, which are generated when the optical film F10X is manufactured and when the optical film F10X is transported. The defect inspection device 2 performs inspection processing such as reflection inspection, penetration inspection, oblique penetration inspection, cross Nicol penetration inspection, and the like for the optical film F10X carried on the transportation line. To detect defects of the optical film F10X.

For example, the defect inspection device 2 is located on the conveying line 9 and is located more upstream than the nip rollers 5a and 5b. The defect inspection device 2 has a plurality of illumination units (not shown) that irradiate the optical film F10X with illumination light and detects the transmission through the optical film A plurality of light detection sections of light (transmitted light) after F10X or light (reflected light) reflected by optical film F10X.

When the defect inspection device 2 is configured to detect transmitted light, a plurality of illumination units and light detection units arranged in the conveyance direction of the optical film F10X are disposed to face each other across the optical film F10X. In addition, the defect inspection device 2 is not limited to a configuration that detects transmitted light, and may be a configuration that detects reflected light or a configuration that detects transmitted light and reflected light. In the case of detecting the reflected light, the light detection section may be disposed on the side of the illumination section.

The illuminating unit irradiates the optical film F10X with the illuminating light adjusted in light intensity, wavelength, and polarization state according to the type of defect inspection. The light detection unit uses an imaging element such as a CCD (Charge Coupled Device) to capture an image of the position where the optical film F10X is illuminated by the illumination light. The image (result of defect inspection) captured by the light detection section is output to the control device 6.

Furthermore, it may further include: a defect inspection device (not shown), which performs defect inspection of the long strip-shaped polarizing film before the long strip-shaped optical film and the long strip-shaped surface protective film are bonded; And a recording device (not shown) records defect information obtained based on a defect inspection result of the defect inspection device in the aforementioned polarizing film. A defect inspection device (not shown) has the same configuration as the defect inspection device 2 described above, and detects defects of the polarizing film.

The defect information recorded by the recording device (not shown) contains information about the location or type of the defect, for example, identification by characters, barcodes, two-dimensional codes (DataMatrix codes, QR codes (registered trademarks), etc.) Code to record. The identification code includes, for example, information indicating how far the defect detected by a defect inspection device (not shown) exists in the film width direction from the position where the identification code is printed (the position of the defect). Information). The identification code may include information on the type of the detected defect.

The recording device is provided on the transporting line of the polarizing film, and is disposed further downstream than a defect inspection device (not shown). The recording device includes a print head using, for example, an inkjet method. This printing head discharges ink at a position along an end edge portion (end portion) in the width direction of the polarizing film, and performs the above-mentioned defect information printing.

The defect information reading device 3 is provided on the conveyance line 9 and is provided further downstream than the defect inspection device 2. The defect information reading device 3 reads defect information that has been recorded in the optical film F10X (the aforementioned polarizing film). The defect information reading device 3 includes an imaging device. The imaging device uses an imaging element such as a CCD to capture defect information of the optical film F10X being conveyed.

The defect information reading device 3 is a defect that reads, for example, characters, barcodes, two-dimensional codes (DataMatrix codes, QR codes (registered trademarks), etc.) that contain information about the location or type of a defect. Information. For example, by reading the defect information, it is possible to obtain information showing how far the defect detected by the defect inspection device 2 and the like is located in the film width direction from the position where the identification code is printed (the position of the defect) Information). When the identification code includes information about the type of the detected defect, the information about the type of the detected defect is obtained by reading the defect information. The defect information (reading result) obtained by the defect information reading device 3 is output to the control device 6.

The marking device 4 is provided on the transport line 9 further downstream than the defect information reading device 3. The marking device 4 emits ink 4i at the position of the defect based on the result of the defect inspection, thereby marking information on the optical film F10X. The marking device 4 prints (marks) a dot-shaped mark larger than the defect on the defective portion of the optical film F10X, thereby directly recording the defective portion.

In addition, the marking device 4 can also directly record the defective portion by printing (marking) a dot-like, line-shaped, or frame-shaped mark including the size of the defect. At this time, in addition to the mark, a mark or pattern indicating the type of the defect may be printed on the defective portion, thereby recording information about the type of the defect.

The defect inspection system 10 may further include a length measuring device (not shown) for measuring the conveyance amount of the optical film F10X. For example, in the case of a length measuring device, an angular position sensor such as a rotary encoder may be disposed on the nip roller on the conveying line 9. The length measuring device measures the conveying amount of the optical film F10X according to the rotational displacement amount of the nip roller 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 is an integrated unit of the control film manufacturing device 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 (Central Processing Unit; central processing unit), and an information storage unit such as a memory or a hard disk.

An information storage section of the control device 6 stores an operating system (OS) that controls a computer system, or a calculation processing section records a program that causes each section of the film manufacturing apparatus 1 to execute various processes. In addition, the control device 6 may include a logic circuit such as an ASIC (Application Specific Integrated Circuit) for performing various processes required for control of each part of the film manufacturing device 1. The control device 6 includes an interface for inputting and outputting the computer system and an external device. An input device such as a keyboard or a mouse, a display device such as a liquid crystal display, and a communication device can be connected to the interface.

The control device 6 analyzes the image captured by the light detection section of the defect inspection device, and determines the presence (position), type, etc. of the defect. When it is determined that a defect exists in the polarizing film, the control device 6 controls the recording device and records defect information on the polarizing film. When the control device 6 determines that there is a defect in the optical film F10X based on the inspection result of the defect inspection device and the reading result of the defect information reading device 3, the control device 6 controls the marking device 4 and prints a mark on the optical film F10X.

(Marking device)

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

As shown in FIG. 13, the marking device 4 includes a droplet ejection device 20, a shielding plate 30 (shielding member), a fixing member 40, and a scattering restricting member 50. First, in the following description, the droplet ejection device 20, the shielding plate 30, and the fixing member 40 other than the scattering restricting member 50 among the constituent elements of the marking device 4 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 emits the ink 4i to the optical film F10X to print a dot-shaped mark 12 larger than a defect on the defective portion of the optical film F10X.

In the following description, the xyz orthogonal coordinate system is set as necessary, and the positional relationship of each component will be described with reference to the xyz orthogonal coordinate system. In this embodiment, the normal direction of the exit surface 22 of the droplet ejection device 20 is defined as the x direction, and the direction orthogonal to the x direction (the width direction of the exit surface 22) is defined as y within the plane of the exit surface 22. The direction is a direction orthogonal to the x-direction and the y-direction as the z-direction. Here, the x direction and the y direction are located in a horizontal plane, and the z direction is located in a vertical direction (up and down direction). The x-direction is sometimes referred to as the front-rear direction and the y-direction is sometimes referred to as the left-right direction. The + x direction is sometimes called the forward direction, the -x direction is called the backward direction, the + y direction is called the left direction, the -y direction is called the right direction, and the + z direction is called the up direction. The -z direction is called the down direction.

As shown in FIG. 6, the marking device 4 ejects the ink 4i from the horizontal direction orthogonal to the vertical direction with respect to the optical film F10X conveyed toward the direction V1 (upper) parallel to the vertical direction on the conveying 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 this 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. Fig. 8 is a sectional view taken along the line VIII-VIII in Fig. 7. FIG. 9 is an enlarged view of a main part of FIG. 8 and is a schematic diagram for explaining the function of the shielding plate 30 according to the first embodiment. Note that in FIG. 9, the illustration of the fixing member 40 is omitted for convenience.

As shown in FIG. 7, the liquid droplet ejection apparatus 20 includes a plurality of ejection heads 20A capable of ejecting ink. In Fig. 7, three injection heads 20A are shown as an example, but the number of the injection heads 20A is not limited to this, and one, two, or four or more can be appropriately set as required. The injection head 20A is formed in a rectangular parallelepiped shape having long sides in the y-direction. The emission surface 22 (see FIG. 8) of the injection head 20A is formed in a rectangular shape with long sides along the y direction when viewed from the front of FIG. 7.

A plurality of shielding plates 30 are provided for each of the plurality of injection heads 20A. In FIG. 7, although three shielding plates 30 provided for every three injection heads 20A are shown as an example, the number of the shielding plates 30 is not limited to this, but can be set in accordance with the number of the injection heads 20A. And one or two or four or more can be set as required. The surface 32 (hereinafter referred to as the "first principal surface") of the shielding plate 30 opposite to the emission surface 22 is formed in a rectangular shape having substantially the same size as the emission surface 22 when viewed from the front in FIG. 7.

The fixing member 40 is capable of fixedly providing a plurality of shielding plates 30 for each of the plurality of injection heads 20A. In FIG. 7, although three fixing members 40 that can be fixedly provided with the shielding plate 30 every three ejection heads 20A are shown as an example, the number of the fixing members 40 is not limited to this, but can be matched. The number of the injection heads 20A and the shielding plates 30 is set, and one or two or four or more can be appropriately set as required. The fixing member 40 is formed in a rectangular frame shape outside the first main surface 32 of the shielding plate 30 when viewed from the front side in FIG. 7.

For example, the injection head 20A is an inkjet head using a valve system. 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 (hereinafter referred to as "dot diameter") of the dot-shaped mark 12 printed on the optical film F10X. '') Is a value in a range of 1 mm to 10 mm, and is set to a value in a range of 0.05 μL or more and 0.2 μL or less. In this embodiment, the droplet amount is set to 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 set to 0.05 × 10 ^{-3 in} order to make the dot diameter in a range of 1 mm to 10 mm. A value in the range of Pa · s or more and 1.00 × 10 ^-3 Pa · s or less. In this embodiment, the ink viscosity is set to 0.89 × 10 ^-3 Pa · s.

For example, the ejection speed of the ink from the ejection head 20A (hereinafter referred to as "ink ejection speed") is a value in a range of 1 m / s or more and 10 m / s or less, and preferably 4 m / s or more and 5 m or less. Values in the range below / s are used as the printable range. In this embodiment, the ink ejection speed is set to about 4.2 m / s. By setting the ink ejection speed within the above range, it is possible to print with high accuracy on the printing area that is the target of the optical film F10X during transportation, and it is possible to suppress droplets when the ink drops (for example, as shown in FIG. 14). The occurrence of the second droplet 4b). Here, the so-called "drip of ink" means that the ejected ink 4i is in contact with the optical film F10X and printed on the optical film F10X while the shape of the ink 4i is broken.

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

For example, the ejection pressure of the ink from the ejection head 20A (hereinafter referred to as "ink ejection pressure") is set to a value in a range of 0.030 MPa or less, preferably a value in a range of 0.020 MPa to 0.28 MPa. The range where the logo 12 can be printed on the optical film F10X. In this embodiment, the ink ejection pressure is set to about 0.025 MPa. By setting the ink ejection pressure within the above range, the ink ejection speed can be stabilized, and the droplets 4a during ink ejection and the droplets during ink dripping can be suppressed (for example, the second droplet 4b shown in FIG. 14). ).

For example, the distance K1 (see FIG. 9) between the exit hole 21 of the ejection head 20A and the optical film F10X is set to a value of 50 mm or less, preferably a value of 5 mm or more and 15 mm or less. The logo 12 is printed on the area of the optical film F10X. The reason is that when the distance K1 is set too small, the ejection head 20A may be in contact with the optical film F10X. When the distance K1 is set too large, the droplets scattered when the ink is ejected from the ejection hole 21 may be wide. Scope expansion. In this embodiment, the distance K1 is set to about 13 mm. The distance K1 is the length of a line segment formed by connecting the center of the exit hole 21 in the exit surface 22 and the printing surface (the surface on the −x direction side) of the optical film F10X in the normal direction of the exit surface 22. . The distance between the emitting hole 21 of the emitting head 20A and the optical film F10X is equivalent to the distance between the emitting surface 22 of the emitting head 20A and the optical film F10X.

For example, the wind speed around the optical film F10X generated by the transportation of the optical film F10X is a value in a range of 0.5 m / s or less, preferably a value in a range of 0.2 m / s or less. The logo 12 is printed on the area of the optical film F10X. In this embodiment, the aforementioned wind speed is set to be about 0.1 m / s under the condition that the line speed is about 25 m / min. When the wind speed is within the above range, the generated droplets 4a and 4b can be suppressed from spreading over a wide range.

The ejection surface 22 of the ejection head 20A (the droplet ejection device 20) is formed with a plurality of ejection holes 21 for ejecting ink to the optical film F10X. The plurality of injection holes 21 are arranged along the width direction (y direction) of the emission surface 22 and are arranged in a row at the center in the up-down direction (z direction) of the emission surface 22. In FIG. 7, although nine injection holes 21 are shown as an example in each of the injection surfaces 22, in this embodiment, 16 injection holes 21 are formed in each of the injection surfaces 22. In addition, the number of the injection holes 21 is not limited to this, but can be appropriately set to a number of 8 or less or a number of 10 or more as needed. The arrangement of the injection holes 21 is not limited to one row, but two or more rows can be appropriately set as required. The injection hole 21 is circular when viewed from the front in FIG. 7.

As shown in FIG. 8, the shielding plate 30 is provided on the emission surface 22. As shown in FIG. 9, the shielding plate 30 has a thickness t1 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 a range of 2 mm to 10 mm, and more preferably a value in a range of 2 mm to 5 mm. In this embodiment, the thickness t1 of the shielding plate 30 is set to about 3 mm. In addition, the thickness t1 of the shielding plate 30 may be made as large as possible within a range where the shielding plate 30 does not contact the optical film F10X.

The shielding plate 30 is capable of blocking the droplets 4a scattered when the ink 4i is ejected from the ejection hole 21. The shielding plate 30 is formed with an opening portion 31 which is opened at a position facing the injection hole 21. The opening portion 31 has an inner wall surface 31a facing the ejection path Ia on which the ink 4i is provided. The inner wall surface 31a of the opening portion 31 is formed in a cylindrical shape with the emission path Ia as a central axis. The inner wall surface 31 a of the opening portion 31 is a droplet 4 a that scatters the ink 4 i in a direction that intersects the normal line of the emission surface 22 when the ink 4 i is ejected from the emission hole 21. At least a part of the scattered droplets 4 a is attached to the inner wall surface 31 a of the opening portion 31.

As shown in FIG. 7, a plurality of openings 31 are provided for each of the plurality of ejection holes 21. The plurality of openings 31 are arranged along the width direction (y direction) of the first main surface 32 and are arranged in a row at the center in the up-down direction (z direction) of the first main surface 32. In FIG. 7, although each shielding plate 30 has nine openings 31 as an example, in this embodiment, each shielding plate 30 is provided with 16 openings in cooperation with 16 injection holes 21. 31. In addition, the number of the openings 31 is not limited to this, but a number of eight or less or a number of ten or more can be appropriately set as needed. The arrangement of the openings 31 is not limited to one row, but two or more rows can be appropriately set as required. The opening 31 is circular when viewed from the front in FIG. 7.

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

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, and more preferably a value of 5 mm or less. In the present embodiment, the distance L1 is set to about 10 mm. The distance L1 may be made as small as possible within a range where the shielding plate 30 does not contact the optical film F10X.

The shielding plate 30 is in contact with the emission surface 22. In other words, the surface 35 on the exit surface 22 side of the shielding plate 30 (hereinafter referred to as the “second principal surface”) 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 this embodiment, the shielding plate 30 is formed by an acrylic plate. In addition, the shielding plate 30 may be formed of a plate material that does not respond to ink. Thereby, since the corrosion by the ink of the shielding plate 30 can be suppressed, the corrosion resistance of the shielding plate 30 can be improved.

The fixing member 40 fixes the shielding plate 30 to the injection 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 made of a metal plate such as SUS.

The first wall portion 41 covers the side end portions 23 and 33 located in a direction orthogonal to the normal line of the emission surface 22 of both the emission head 20A and the shielding plate 30. The first wall portion 41 is formed in a rectangular cylindrical shape extending in the front-rear direction (x direction). The first wall portion 41 is a portion abutting on the exit surface 22 side of the side end portion 23 of the ejection head 20A in the up-down direction (z direction) and the width direction (y direction), and the up-down direction of the shielding plate 30 (z direction ) And both side ends 33 in the width 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. This can restrict the relative movement of the ejection head 20A and the shielding plate 30 in the up-down direction (z direction) and the width direction (y direction).

The second wall portion 42 is an outer edge portion 34 that covers the outer periphery of the opening portion 31 in the first main surface 32 of the shielding plate 30. The second wall portion 42 is formed in a rectangular frame shape extending from the front end (the end in the + x direction) of the first wall portion 41 toward the inside in the z direction. The second wall portion 42 is in contact with an outer edge portion 34 on the outer periphery of the opening portion 31 in the first main surface 32 of the shielding plate 30. For example, the second wall portion 42 is integrated with the same member as the first wall portion 41. The second wall portion 42 may be locked and connected to the first wall portion 41 by a fastening member such as a bolt. This can restrict the relative movement of the ejection head 20A and the shielding plate 30 in the front-rear direction (x-direction).

The scattering restriction member 50 among the constituent elements of the marking device 4 will be described below. Fig. 13 is a perspective view showing a marking device 4 according to the first embodiment. Fig. 14 is an enlarged view including the main part of Fig. 13 and is a diagram for explaining the operation of the scattering restricting member 50 in the marking device 4 according to the first embodiment. Note that in FIG. 14, the illustration of the fixing wall portions 53 and 54 is omitted for the sake of 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 restricting member 50.

As shown in FIG. 14, the scattering restriction 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, which are located forward of the shielding plate 30. The scattering restricting member 50 blocks droplets scattered until the ink 4i is ejected from the ejection hole 21 and drops on the optical film F10X. The droplets include at least one of the first droplet 4a scattered when the ink 4i is ejected from the ejection hole 21 and the second droplet 4b scattered when the ink 4i is dropped on the optical film F10X. The effects of the first droplet 4a and the second droplet 4b on the printing target are particularly large.

Here, in addition to the droplets 4a and 4b generated when the ink is ejected and dripped, the droplets scattered after the ink 4i is ejected from the ejection hole 21 before being dropped on the optical film F10X are also listed. The droplets scattered during the flight towards the optical film F10X. However, compared with the droplets 4a and 4b generated when the ink is ejected and dripped, the droplets scattered by the ink 4i during flight are smaller, and the size of the droplets is also very small. The influence to the extent that the printed object is contaminated is small.

The first droplet 4 a is a droplet that does not adhere to the inner wall surface 31 a of the opening portion 31 of the shielding plate 30 but floats in the air through the opening portion 31. The droplets scattered by the ink 4i in flight take the same behavior as the first droplet 4a.

The scattering restricting member 50 is formed with a blocking surface 50f that extends in a direction orthogonal to the normal to the emission surface 22. In the scattering restriction member 50, the blocking surface 50f on the emission surface 22 side restricts the first droplet 4a from moving toward the optical film F10X side; the blocking surface 50f on the optical film F10X side restricts the second droplet 4b toward the emission surface 22 side. mobile. That is, at least a part of the first droplet 4a scattered is attached to the blocking surface 50f on the emission surface 22 side in the scattering restriction member 50, and at least a part of the second droplet 4b scattered is attached to the scattering restriction member 50. The blocking surface 50f on the side of the optical film F10X.

In addition, the blocking surface 50f is not limited to extend in a direction orthogonal to the normal line of the emission surface 22, but may extend in a direction that intersects the normal line of the emission surface 22. For example, the blocking surface 50f is from the viewpoint of effectively blocking the first droplet 4a and the second droplet 4b. In order to maximize the area facing the optical film F10X, it is preferable to face the film parallel to the film conveying direction. The direction extends perpendicularly to the direction normal to the exit surface 22. Furthermore, if the above relationship cannot be maintained due to the relationship of the equipment layout, in order to be as parallel as possible with respect to the film conveying direction, the angle formed by the normal surface of the blocking surface 50f and the emission surface 22 may be adjusted.

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 restriction 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 set to about 3 mm. The thickness of the scattering restriction plates 51 and 52 may be appropriately set as required, as long as it is set to a level at which the first droplet 4a and the second droplet 4b can be blocked.

The scattering restriction plates 51 and 52 are rectangular shapes having long sides in the film width direction (the y direction shown in FIG. 13) and short sides in the film conveying direction (the z direction shown in FIG. 13). In this embodiment, the length of the long sides of the scattering restriction plates 51 and 52 is set to about 1600 mm corresponding to the film width, and the length of the short sides of the scattering restriction plates 51 and 52 is set to about 50 mm.

As shown in FIG. 14, the first scattering-restricting plate 51 is disposed on one side with the ejection path Ia from which the ink 4i is ejected. The second scattering-restricting plate 52 is disposed on the other side via the emission path Ia. The first scattering restriction plate 51 is disposed above the emission path Ia in the vertical direction, and the second scattering restriction plate 52 is disposed below the emission path Ia in the vertical direction. The first scattering restriction plate 51 and the second scattering restriction plate 52 are disposed at positions adjacent to each other across the emission path Ia. The first scattering-restricting plate 51 is formed with a first blocking surface 51f extending in a direction orthogonal to the normal to the emission surface 22, and the second scattering-restricting plate 52 is formed with a parallel surface to the first blocking surface 51f. The extended second blocking surface 52f.

As shown in FIG. 13, an interval s1 (hereinafter referred to as a “slit interval”) at which the first scattering restriction plate 51 and the second scattering restriction plate 52 are separated is smaller than the diameter d2 of the injection hole 21 (refer to FIG. 9). (Figure) bigger. For example, the slit interval s1 is preferably a value in a range of 2 mm to 10 mm, and more preferably a value in a range of 2 mm to 5 mm. The reason is that when the slit interval s1 is set too small, the ink 4i cannot pass through the slit interval s1, that is, there is a possibility that the ink 4i may touch the first scattering limit plate 51 and the second scattering limit plate 52. When the slit interval s1 is set too large, there is a possibility that the first droplets 4a from the injection holes 21 may expand widely. In this embodiment, the slit interval s1 is set to about 5 mm. The diameter d2 of the injection hole 21 is set to 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 above the rear side (the -x direction side). The side wall portions 53b of the first fixed wall portion 53 are 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 are positioned further toward the rear side (-x direction side). The upward method is inclined, and then it flexes toward the rear and extends. Thereby, the support rigidity of the first scattering restriction plate 51 can be improved, and the movement of the first droplet 4a upward and leftward and rightward can be restricted.

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

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 54 a of the second fixed wall portion 54 is integrally connected to the lower end of the second scattering restriction plate 52 and extends toward the rear (-x direction). The side wall portions 54b of the second fixed wall portion 54 are integrally connected to the left and right side ends of the lower portion of the second scattering restriction plate 52 and the left and right side ends of the lower wall portion 54a, and extend rearward until reaching the rear end of the lower wall portion 54a. Thereby, the support rigidity of the second scattering restricting plate 52 can be improved, and the movement of the first droplet 4a downward and leftward and rightward can be restricted.

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

The blocking surface 50f on the optical film F10X side of the scattering restriction 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 restriction 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, it is a value of 1 mm or more and 5 mm or less. This reason is that when the distance between the blocking surface and the optical film is set too small, there is a possibility that the scattering restricting member 50 may contact the optical film F10X. When the distance between the blocking surface and the optical film is set too large, There is a possibility that the movement of the second droplet 4b cannot be restricted by the blocking surface 50f. In this embodiment, the distance between the blocking surface and the optical film is set to about 3 mm.

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

For example, the scattering restricting member 50 is formed of a metal plate such as SUS or an acrylic plate and a plastic plate such as a polypropylene plate (PP plate). In this embodiment, the scattering restricting member 50 is formed by an acrylic plate. In addition, the scattering restriction member 50 may be formed of a plate material that does not respond to ink. This can suppress corrosion caused by the ink of the scattering restricting member 50, so that the corrosion resistance of the scattering restricting member 50 can be improved.

As described above, the marking device 4 of this embodiment is capable of marking the mark 12 by emitting ink 4i to the optical film F10X. The marking device 4 is provided with a droplet ejection device 20 having an optical film F10X formed thereon. The emission surface 22 of the injection hole 21 of the ink 4i; and the scattering restricting member 50, which is provided between the emission surface 22 and the optical film F10X, and can block the first droplet 4a scattered when the ink 4i is emitted from the injection hole 21, The ink 4i is dropped on at least one of the second droplets 4b scattered when the optical film F10X is dropped; and the blocking member 50 is formed with a blocking surface 50f that expands in a direction orthogonal to the normal line of the emission surface 22.

According to this embodiment, between the emission surface 22 and the optical film F10X, a first droplet 4a and an ink 4i which are capable of blocking the ink 4i from scattering when the ink 4i is ejected from the injection hole 21 are provided to the optical film F10X. The scattering restricting member 50 of at least one of the droplets 4 b forms a blocking surface 50 f which extends in a direction orthogonal to the normal to the emission surface 22 in the scattering restricting member 50, thereby removing the scattering restricting member 50 from the liquid instead of providing the scattering restricting member 50. Compared with the case where the droplet ejection device 20 directly ejects ink, the first droplet 4a can be restricted from moving between the emission surface 22 and the optical film F10X toward the optical film F10X side, and the second droplet 4b can be restricted from moving toward the emission surface 22 side. Therefore, even if the first droplet 4a scatters when the ink 4i is ejected from the ejection hole 21, or the second droplet 4b scatters when the ink 4i drops on the optical film F10X, it is still possible to suppress the first droplet 4a and the second droplet 4b from attaching to the optical The film F10X is in a region other than the defect site, and the yield of the product can be improved.

In addition, the scattering restriction member 50 includes scattering restriction plates 51 and 52 having a thickness in a direction (x direction) parallel to the normal line of the emission surface 22, whereby the thickness of the scattering restriction plates 51 and 52 can be increased by adjusting the thickness thereof. The scattering restriction plates 51 and 52 are rigid and can effectively block the first droplet 4a and the second droplet 4b.

The scattering restriction member 50 includes a first scattering restriction plate 51 disposed on one side via the emission path Ia of the ink 4i, and a second scattering restriction plate 52 disposed on the other side via the emission path Ia. This makes it possible to effectively block the first droplets 4a and the second droplets 4b scattered to both sides via the ejection path Ia with a simple structure.

In addition, the first scattering restriction plate 51 is disposed above the emission path Ia in the vertical direction, and the second scattering restriction plate 52 is disposed below the emission path Ia in the vertical direction, so that a simple configuration can be used. This effectively blocks the first droplets 4a and the second droplets 4b that are scattered to the upper and lower sides via the ejection path Ia.

A first blocking surface 51f is formed on the first scattering-restricting plate 51 to extend in a direction orthogonal to the normal to the emission surface 22, and a second blocking surface is formed on the second scattering-limiting plate 52. The second blocking surface 52f, which extends in parallel with 51f, can effectively restrict the ejection without biasing the restriction of either of them compared with the case where the first blocking surface 51f and the second blocking surface 52f cross each other. The first droplet 4a between the surface 22 and the optical film F10X moves toward the optical film F10X side, and the second droplet 4b moves toward the exit surface 22 side.

In addition, by setting the slit interval s1 to be larger than the diameter d2 of the injection hole 21, it is possible to avoid the ink 4i from touching the first scattering restriction plate 51 and the second scattering restriction plate 52.

Moreover, in the said embodiment, although the example where the 1st scattering-restriction plate 51 and the 2nd scattering-restriction plate 52 were arrange | positioned on both sides through the emission path Ia was demonstrated, it is not limited to this. For example, the scattering restricting plate may be arranged only vertically below the emission path Ia from which the ink 4i is emitted. As a result, compared with a case where the first scattering restriction plate 51 and the second scattering restriction plate 52 are arranged on both sides with the emission path Ia interposed therebetween, a simple structure can be formed by reducing the number of parts and cost reduction can be achieved. In addition, the first droplets 4a and the second droplets 4b which are scattered below the ejection path Ia due to the influence of gravity can be selectively blocked. In particular, when the spot diameter is large (when there are many droplets), when the optical film F10X is transported in the up-down direction, the number of droplets scattered below will increase. Therefore, only the scattering-limiting plate is disposed on the The actual benefit below the injection path Ia becomes larger.

Furthermore, a shielding plate 30 provided on the emitting surface 22 and capable of blocking the droplets 4a scattered when the ink 4i is emitted from the emitting hole 21 is provided. The shielding plate 30 has an opening at a position facing the emitting hole 21 and has The opening portion 31 of the inner wall surface 31a shields the droplets 4a scattered in a direction intersecting with the normal line of the ejection surface 22, thereby directly ejecting the ink 4i from the droplet ejection device 20 without providing the shielding plate 30 Compared with the case, the diffusion range of the droplets 4a scattered toward the direction intersecting with the normal of the emission surface 22 can be reduced, and specifically, the scattering of the mark 12 as the center when the droplets 4a have been attached to the optical film F10X can be reduced. The diameter L2 (see FIG. 9), so that even if the droplets 4a are scattered when the ink 4i is ejected from the injection hole 21, it is possible to suppress the droplets 4a from adhering to areas other than the defect portion of the optical film F10X, and it is possible to improve the yield of the product.

In addition, since the shielding plate 30 having a thickness t1 in a direction parallel to the normal to the emission surface 22 is provided, the diffusion range of the droplets 4a can be adjusted by adjusting the thickness t1 of the shielding plate 30, so that the adhesion of the droplets 4a can be suppressed In the area other than the defect portion of the optical 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 droplets 4a can be minimized.

In addition, a fixing member 40 capable of fixing the shielding plate 30 to the droplet ejection device 20 is further provided, thereby making it easier to firmly fix the shielding plate 30 to the droplet ejection device 20 compared to a case where the fixing member 40 is not provided.

In addition, the fixing member 40 includes a first wall portion 41 and a second wall portion 42. The first wall portion 41 covers a normal line of the emission surface 22 that is orthogonal to both the emission head 20A and the shielding plate 30. Side end portions 23 and 33 in the direction, and 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, so that the shielding plate 30 can be firmly fixed. In the injection head 20A, the relative movement of the injection head 20A and the shielding plate 30 in the left-right up-down direction (xyz direction) can be restricted with a simple structure.

The droplet ejection device 20 is provided with a plurality of ejection heads 20A capable of ejecting the ink 4i, and the shielding plate 30 is provided with a plurality of ejection heads 20A. The fixing member 40 is capable of inserting the shielding plate 30 in plurality. A plurality of injection heads 20A are fixedly provided, so that the shielding plate 30 and the fixing member 40 can be positioned in a one-to-one relationship with each injection head 20A. Therefore, the shielding corresponding to the installation of a size corresponding to the plurality of injection heads 20A is provided. Compared with the case of the plate and the fixed member, the relative positional deviation of the injection head 20A, the shielding plate 30, and the fixed member 40 can be suppressed.

In addition, when the shielding plate 30 abuts on the emission surface 22, it is easier to restrict the relative movement of the injection head 20A and the shielding plate 30 in the front-rear direction (x direction) than when the shielding 30 is separated from the emission surface 22.

Furthermore, by setting the diameter d1 of the opening 31 to be larger than the diameter d2 of the injection hole 21, it is possible to avoid the ink 4i emitted from the injection hole 21 from touching the opening 31.

The defect inspection system 10 according to this embodiment includes: a conveying line 9 for conveying a long strip-shaped optical film F10X; a defect inspection device 2 for performing a defect inspection of the optical film F10X conveyed on the conveying line 9; and a mark The device 4 is capable of printing a mark 12 by ejecting ink 4i on the position of the defect 11 based on the result of the defect inspection.

According to this embodiment, even if the first droplet 4a is scattered when the ink 4i is ejected from the injection hole 21 by having the above-mentioned marking device 4, the second droplet 4b is scattered when the ink 4i is dropped on the optical film F10X. The first droplets 4a and the second droplets 4b can still be inhibited from being attached to areas other than the defect portion of the optical film F10X, and the yield of the product can be improved. In addition, the marking device 4 is capable of printing the mark 12 on the position of the defect 11 by ejecting the ink 4i at the position of the defect 11 based on the result of the defect inspection, so that the mark 12 can be printed by aligning the position of the defect. 4b is adhered to a region other than the defect portion of the optical film F10X, and the yield of the product can be further improved.

In addition, the marking device 4 ejects the ink 4i from the optical film F10X conveyed on the conveying line 9 in a direction parallel to the vertical direction from a horizontal direction orthogonal to the vertical direction, thereby facing the marking device 4 downward in the vertical direction and horizontally. Compared with the case where the optical film F10X conveyed in the direction ejects the ink 4i, the ink 4i can also 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 above-mentioned defect inspection system 10.

According to the present embodiment, by including the defect inspection system 10 described above, even if the first droplet 4a is scattered when the ink 4i is ejected from the injection hole 21, or the second droplet 4b is scattered when the ink 4i is dropped on the optical film F10X. It is still possible to suppress the first droplet 4a and the second droplet 4b from adhering to a region other than the defect portion of the optical film F10X, and the yield of the product can be improved. In addition, by printing the mark 12 by aligning the position of the defect, it is possible to effectively prevent the droplets 4a and 4b from adhering to the area other than the defect portion of the optical film F10X, and further improve the yield of the product.

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

According to this embodiment, by including the above-mentioned marking step, even if the first droplet 4a scatters when the ink 4i is ejected from the injection hole 21, or the second droplet 4b scatters when the ink 4i drops on the optical film F10X, it can be suppressed. The first droplet 4a and the second droplet 4b are adhered to a region other than the defect portion of the optical film F10X, and the yield of the product can be improved. In addition, by printing the mark 12 by aligning the position of the defect, it is possible to effectively suppress the droplets 4a and 4b from adhering to areas other than the defect portion of the optical film F10X, and further improve the yield of the product.

However, the factors that cause the droplets to scatter when the ink is ejected from the ejection hole include (A1) the amount of droplets, (A2) the viscosity of the ink, and the like.

The above factors will be described below.

As long as the amount of droplets is small, it is considered that droplets hardly scatter when the ink is ejected from the ejection holes, or that the degree of contamination of the optical film is small even if the droplets are scattered. On the other hand, from the review by the present inventors, it is known that when the amount of liquid droplets is large, droplets will be scattered when the ink is ejected from the ejection hole, and the scattered droplets will contaminate the optical film.

For example, in a commercially available inkjet printer, since the amount of droplets is about 1 × 10 ^-6 μL and is very small, it can be considered that droplets are hardly scattered when the ink is ejected from the ejection hole, or even The droplets have scattered but the effect of the degree of contamination of the optical film is still small. On the other hand, in the liquid droplet ejection device 20 of this embodiment, the amount of liquid droplets is about 0.166 μL. When compared with a commercially available inkjet printer, the amount of liquid droplets is quite large, and therefore the ink may be discharged from When the injection hole is ejected, the droplets will be scattered, and the scattered droplets will contaminate the optical film.

In addition, if the viscosity of the ink is large, it is considered that droplets are hardly scattered when the ink is ejected from the ejection hole. On the other hand, from the review by the present inventors, it can be understood that when the viscosity of the ink is small, droplets will be scattered when the ink is ejected from the injection hole, and the scattered droplets will 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 liquid droplet ejection device 20 of this embodiment, the ink viscosity is about 0.89 × 10 ^-3 Pa˙s, which is relatively small compared with a commercially available inkjet printer, and therefore, droplets may be in the ink. It will fly away when ejected from the injection hole, and the scattered droplets will contaminate the optical film.

Even when the droplets are scattered when the ink is ejected from the injection hole due to the above factors (A1), (A2), etc., according to this embodiment, an opening is formed in the shielding plate 30 at a position facing the injection hole 21 In addition, it has an opening portion 31 of an inner wall surface 31a that shields droplets 4a scattered in a direction intersecting the normal line of the emission surface 22, thereby directly ejecting from the droplet ejection device 20 without providing a shielding plate 30 Compared with the case of the ink 4i, the diffusion range of the droplets 4a scattered toward the direction intersecting with the normal of the emission surface 22 can be reduced. Specifically, the mark 12 when the droplets 4a are attached to the optical film F10X is used as a center. The scattering diameter L2 (see FIG. 9) can effectively prevent the droplets 4 a from adhering to areas other than the defect portion of the optical film F10X, and can further improve the yield of the product.

On the other hand, in terms of the scattering of the droplets when the ink drops on the optical film (printing object), (B1) dot diameter (droplet amount), (B2) ink viscosity, (B3) printing object, (B4) Line speed and so on.

The above factors will be described below.

As long as the dot diameter is extremely small (as long as the amount of droplets is small), it may be considered that the droplets hardly scatter when the ink drops on the printing object, or even if the droplets are scattered, the degree of contamination to the printing object is still small. On the other hand, from the review by the inventors, it can be understood that when the dot diameter is large (the liquid droplet volume is larger), the droplets will be scattered when the ink drops on the printing object, and the scattered droplets will contaminate the printing object.

For example, in a commercially available inkjet printer, the dot diameter is extremely small to about 20 μm, and the amount of droplets can be estimated to be about 1 × 10 ^-6 μL. It can be considered that when the ink drops on the printing object, droplets will hardly scatter Or, even if the droplets have scattered, the effect of contaminating the printed object is still small. On the other hand, in the droplet ejection device 20 of this embodiment, the value of the spot diameter is in the range of 1 mm to 10 mm, and the estimated droplet volume is about 0.166 μL, which is equivalent to that of a commercially available inkjet printer. In some cases, because the dot diameter is quite large (because the amount of droplets is quite large), sometimes droplets will be scattered when the ink drops on the printed object, and the scattered droplets will contaminate the printed object.

In addition, if the viscosity of the ink is large, it is considered that the droplets hardly scatter when the ink drops on the printing target. On the other hand, from the review by the present inventors, it can be understood that when the viscosity of the ink is small, the droplets will be scattered when the ink drops on the printing object, and the scattered droplets will contaminate the printing object.

For example, in a commercially available inkjet printer, the ink viscosity is about 1.17 × 10 ^-3 Pa˙s. On the other hand, in the liquid droplet ejection device 20 of this embodiment, the ink viscosity is about 0.89 × 10 ^-3 Pa˙s, which is smaller than that of a commercially available inkjet printer, so droplets may sometimes When the ink drops on the printed object, it will scatter, and the scattered droplets will contaminate the printed object.

In addition, if the printing target is a paper medium such as recording paper, it can be considered that droplets hardly scatter when ink drips on the printing target. On the other hand, it can be understood from the review by the inventors that when the printing object is an optical film including PVA and TAC, droplets will be scattered when the ink drops on the printing object, and the scattered droplets will contaminate the printing object.

For example, in a commercially available inkjet printer, the printing target is a paper medium. On the other hand, in the liquid droplet ejection device 20 of this embodiment, the printing target is an optical film, and droplets may be scattered when the ink drops on the printing target, and the flying droplets may contaminate the printing target.

When the line speed is low, it is considered that droplets are hardly scattered when ink is dropped on a printing object. On the other hand, from the review by the inventors, it can be understood that when the line speed is large, the droplets will spread widely when the ink drops on the printing object, and the flying droplets will contaminate the printing object.

For example, in a commercially available inkjet printer, the line speed is as small 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 range in which the mark 12 can be printed on the optical film F10X is a value of 50 m / min or less, Some droplets will spread widely when the ink drops on the printed object, and the scattered droplets will pollute the printed object.

Even when the droplets are scattered when the ink is ejected from the injection hole by the above factors (A1), (A2), etc., or when the droplets are caused by the above factors (B1) to (B4), etc. In the case of scattering when dripping on a printing object, according to this embodiment, a first droplet 4a and an ink 4i that block the ink 4i from being scattered when the ink 4i is emitted from the injection hole 21 are provided between the emission surface 22 and the optical film F10X. The scattering restricting member 50 of at least one of the second droplets 4b scattered when dropped on the optical film F10X, and the scattering restricting member 50 forms a blocking surface 50f that expands in a direction orthogonal to the normal of the emission surface 22. This is compared with the case where the ink is directly ejected from the droplet ejection device 20 without providing the scattering restricting member 50, because the first droplet 4a can be restricted from moving toward the optical film F10X side between the emission surface 22 and the optical film F10X, and can The second droplet 4b is restricted from moving toward the emitting surface 22 side, so the first droplet 4a and the second droplet 4b can be effectively prevented from adhering to the area other than the defect portion of the optical film F10X, and the yield of the product can be further improved.

Hereinafter, a modification example of the embodiment will be described. In the following modifications, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

(First Modification of Fixed Member)

FIG. 10 is a schematic view showing a first modified example of the fixing member, and is a cross-sectional view corresponding to FIG. 8.

In the above-mentioned embodiment, the series of lifting fixing members 40 are formed of different members from the shielding plate 30. On the other hand, in this modification, as shown in FIG. 10, the fixing member 140 is formed integrally with the same member as the shielding plate 130.

The fixing member 140 is fixed to the injection head 120A 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 portion 141 covers a side end portion 23 located in a direction orthogonal to the normal of the emission surface 22 in the emission head 20A. The side wall portion 141 is formed in a rectangular cylindrical shape extending in the front-rear direction (x direction). The side wall portion 141 is a portion that abuts on the emission surface 22 side of the side end portions 23 in the up-down direction (z direction) and the width direction (y direction) of the injection head 20A.

The shielding plate 130 is formed in a rectangular frame shape extending from the front end (the end in the + x direction) of the side wall portion 141 toward the inside in the z direction. An opening portion 131 is formed in the shielding plate 130 at a position facing the injection hole 21 and has an inner wall surface 131 a for blocking the droplets 4 a scattered in a direction crossing the normal line of the emission surface 22. The shielding plate 130 is in contact with the emission surface 22. In other words, the second main surface 135 of the shielding plate 130 is disposed on the same plane as the emission surface 22.

For example, the side wall portion 141 is fastened to the injection head 20A by a fastening member such as a bolt. This can restrict the relative movement of the ejection head 20A and the shielding plate 130 in the up-down direction (z direction), the width direction (y direction), and the front-back direction (x direction).

According to this modification, the fixing member 140 is integrally formed with the shielding plate 130 and has a side wall 23 for covering the side end portion 23 located in a direction orthogonal to the normal line of the emission surface 22 in the injection head 20A. The portion 141 can firmly fix the shielding plate 130 to the injection head 20A, and can restrict the relative movement of the injection head 20A and the shielding plate 130 from front to back and up and down (xyz) direction with a simple structure. Moreover, compared with the case where the fixing member 40 is formed of a member different from the shielding plate 30, the number of parts can be reduced, and the device configuration can be simplified.

(Second Modification of Fixed Member)

FIG. 11 is a schematic view showing a second modification of the fixing member, and is a cross-sectional view corresponding to FIG. 8.

In the above-mentioned first modification, a series of examples in which the shielding plate 130 is in contact with the emission surface 22 has been described. In contrast, in this modification, as shown in FIG. 11, the shielding plate 130 is separated from the emission surface 22. Specifically, the second main surface 135 of the shielding plate 130 is disposed more forward (+ x direction) than the emission surface 22.

According to this modification, since the shielding plate 130 is separated from the emission surface 22, the diffusion range of the droplets 4a can be adjusted by adjusting the interval between the shielding plate 130 and the emission surface 22, so that the adhesion of the droplets 4a to the optical film F10X can be suppressed. Area outside the defect. For example, by increasing the distance between the shielding plate 130 and the emitting 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 droplets 4a can be minimized. In addition, compared with the case where the shielding plate 130 is in contact with the emission surface 22, because the thickness t1 of the shielding plate 130 is not adjusted, the distance between the shielding plate 130 and the emission surface 22 can be adjusted to adjust the diffusion range of the droplets 4a. Therefore, the freedom of design can be improved.

(Modification of shielding member)

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

In the embodiment described above, the shielding plate 30 having a thickness in a direction parallel to the normal line of the emission surface 22 has been cited as an example of the shielding member. In contrast, in this modification, as shown in FIG. 12, a cylindrical member 230 extending in a direction parallel to the normal line of the emission surface 22 is provided as a shielding member.

The cylindrical member 230 is formed with an opening portion 231 that is opened at a position facing the injection hole 21. As shown in FIG. 12, the opening portion 231 has an inner wall surface 231 a facing the ejection path Ia (see FIG. 9) from which the ink is ejected. The inner wall surface 231a of the opening portion 231 blocks the droplets 4a (see FIG. 9) that are scattered when the ink is ejected from the ejection hole 21 in a direction that intersects the normal line of the ejection surface 22.

The inner wall surface 231a of the opening portion 231 is formed in a cylindrical shape with the emission path Ia as a central axis. The diameter of the opening portion 231 (the inner diameter of the cylindrical member 230) is larger than the diameter of the injection hole 21.

The tube member 230 is in contact with the emission surface 22. In other words, the end surface 235 (the second principal surface) of the cylindrical member 230 is disposed on the same plane as the emission surface 22.

According to this modification, since the cylindrical member 230 is provided to extend in a direction parallel to the normal to the emission surface 22, the diffusion range of the droplets 4a can be adjusted by adjusting the length of the cylindrical member 230 (the length in the x direction). Therefore, it is possible to suppress the droplets 4a from adhering to areas other than the defect 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.

In addition, by setting the diameter of the opening portion 231 to be larger than the diameter of the injection hole 21, it is possible to avoid the ink 4i emitted from the injection hole 21 from touching the opening portion 231.

[Second Embodiment]

Hereinafter, the configuration of a marking device according to a 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 an enlarged view including the main part of FIG. 15 and is a schematic diagram for explaining the operation of the suction device 60 according to the second embodiment. In FIG. 15, for convenience, only the second suction mechanism 62 (lower suction mechanism) is shown, and in FIG. 16, the first suction mechanism 61 and the second suction mechanism 62 are shown. In FIG. 15, for convenience, the two-dot chain line is used to display the optical film F10X. In FIGS. 15 and 16, illustration of the scattering restriction member 50 is omitted. In this embodiment, the same reference numerals are attached to the constituent elements that are common to the first embodiment, and detailed descriptions thereof are omitted.

In the first embodiment, as shown in FIG. 13, an example in which the marking device 4 includes a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a scattering restricting member 50 has been cited. In contrast, in the present embodiment, as shown in FIG. 15, the marking device 204 is further provided with 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 droplet 4a scattered when the ink 4i is ejected from the injection hole 21 and the second droplet 4b scattered when the ink 4i drops on the optical film F10X.

As shown in Fig. 15, in this embodiment, the suction device 60 includes a second suction mechanism 62. The second suction mechanism 62 is arranged 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 which is inclined forward and upward so as to face the emission path Ia.

The suction surface 62f of the second suction mechanism 62 is formed with a suction hole 62h for attracting the first droplet 4a and the second droplet 4b. The suction hole 62h extends in the suction surface 62f so that it may have a long side along the width direction (y direction) of the suction surface 62f. In FIG. 15, although the suction holes 62 h extending along the width direction (y direction) of the suction surface 62 f are shown as an example, the arrangement of the suction holes 62 h is not limited to this, but can be changed as needed. It is appropriately set, for example, a plurality of suction holes are arranged and arranged in a row along the width direction (y direction) of the suction surface 62f, and the suction holes 62h are divided in the width direction (y direction) of the suction surface 62f.

For example, the distance J1 between the attraction surface 62f and the optical film F10X (hereinafter referred to as the "distance between the attraction surface and the optical film") is set to a value of 10 mm or more. This reason is because when the distance J1 between the attraction surface and the optical film is set too small, there is a possibility that the attraction surface 62f and the optical film F10X may contact each other. In this embodiment, the distance J1 between the suction surface and the optical film is set to about 10 mm. The distance J1 between the suction surface and the optical film is set to the length of a line segment formed by 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 fixed member 40 (hereinafter referred to as the "distance between the suction surface and the fixed member") is set to a value of 30 mm or more. This reason is because when the distance J2 between the suction surface and the fixed member is set too small, there is a possibility that the suction surface 62f and the fixed member 40 may come into contact with each other. In this embodiment, the distance J2 between the suction surface and the fixed member is set to about 30 mm. The distance J2 between the suction surface and the fixed member is the length of a line segment formed by connecting the upper end of the suction surface 62f and the lower end of the fixed member 40 to the normal direction (z direction) below the fixed 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 set to a value of 50 mm or less, and more preferably set to 15 mm or more and 50 mm or less. The range of values. In this embodiment, the distance J3 between the suction hole and the injection hole is set to about 45 mm. The distance J3 between the suction hole and the injection hole is set to the length of a line segment formed by connecting the center of the suction hole 62h on the suction surface 62f and the center of the injection hole 21 on the injection surface 22.

For example, the length of the suction hole 62h is set to be approximately the same as the length of the width (y direction) of the suction surface 62f. Specifically, the length of the suction hole 62h is set to be smaller than the length of the suction surface 62f in the width direction (y direction). The length of the left and right side walls of the suction mechanism 62. The length of the suction hole 62h is set to 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, and more preferably a value of a range of 5 mm or more and 20 mm or less. In this embodiment, the width of the suction hole 62h is set to about 10 mm. The width of the suction hole 62h is set to the length of the short side direction of the suction hole 62h (the inclined direction of the suction surface 62f).

For example, the wind speed (hereinafter referred to as "suction wind speed") when the droplets are attracted by the suction hole 62h is preferably set to a value of 2 m / sec or more, and more preferably 5 m / sec or more and 7 m / sec or less. The range of values. In this embodiment, the suction wind speed is set to 6.4 m / sec. The suction wind speed is a value in a range of 4 m / sec or more and 20 m / sec or less as a range in which the ink 4i (not a droplet but a main drop) is not pulled away.

The size of the suction hole 62h is made changeable. For example, the suction surface 62f is provided with a closing mechanism such as a shutter that can move along the long side direction of the suction hole 62h, thereby also changing the size of the suction hole 62h.

The second suction mechanism 62 has a shape extending obliquely upward and forward so that the suction surface 62f faces the emission path Ia. Specifically, the second suction mechanism 62 includes a suction surface 62f formed in a rectangular shape having a long side in the width direction (y direction), and left and right side surfaces 64 with the left and right side edges of the suction surface 62f as an upper bottom. Instead, it is formed in a ladder shape extending forward and upward. A support shaft 65 that protrudes toward the left and right sides (y direction) parallel to the normal of the left and right side surfaces 64 is provided at the rear end portion (the side end portion in the -x direction) of the second suction mechanism 62.

Support mechanisms 73 are provided on the left and right sides of the second suction mechanism 62 so as to support the second suction mechanism 62 to be rotatable. A stage 72 is provided below the second suction mechanism 62 and extends in the film width direction (y direction). The supporting mechanism 73 is provided with a supporting table 73a fixed to the stage 72, a supporting plate 73b fixed to the supporting table 73a, and a rising piece 73c extending from the widthwise inner end of the supporting plate 73b (+ y direction side) End) extends upward.

The rising piece 73c is formed with a long hole 73h which is opened in the thickness direction (y direction) of the rising piece 73c and extends upward and downward. A support shaft 65 of the second suction mechanism 62 is inserted into the long hole 73h of the rising piece 73c. The size of the long hole 73h is set to be such that the support shaft 65 can move up and down and can rotate about the axis of the support shaft 65. In a state of being inserted into the long hole 73h, the support shaft 65 projects from the upright piece 73c to the left and right sides. The second suction mechanism 62 fixes the support shaft 65 to the erected piece 73c by a fixing device (not shown), thereby limiting the vertical movement and rotation around the axis of the support shaft 65. For example, screw teeth may be formed at the left and right end portions of the support shaft 65, and the position of the second suction mechanism 62 may be restricted by screwing a nut or the like into the screws of the support shaft 65.

In addition, reference numeral 71 in the figure is a support table for supporting the droplet ejection device 20. The support stand 71 extends in the width direction (y direction) of the droplet ejection device 20. For example, the droplet ejection device 20 is fastened and connected to the support base 71 by a fastening member such as a bolt.

According to this embodiment, between the emission surface 22 and the optical film F10X, a first droplet 4a capable of attracting the ink 4i scattered when ejected from the injection hole 21 and a second droplet scattered when the ink 4i drops onto the optical film F10X are provided. As compared with the case where the ink 4i is directly ejected from the liquid droplet ejection device 20 without the suction device 60, the suction device 60 of at least one of 4b can attract the first scattering scattering between the ejection surface 22 and the optical film F10X. One droplet 4a and the second droplet 4b, so even if the first droplet 4a scatters when the ink 4i is ejected from the injection hole 21, or the second droplet 4b scatters when the ink 4i drops on the optical film F10X, the first droplet 4a can be suppressed And the second droplet 4b is attached to a region other than the defect portion of the optical film F10X, and the yield of the product can be improved.

In addition, the second suction mechanism 62 is disposed only vertically below the ejection path Ia from which the ink 4i is ejected in the vertical direction, so that compared with the case where the suction mechanism is disposed on both sides across the ejection path Ia, it is also possible By reducing the number of parts, it is possible to form a simple structure and reduce costs, and to selectively attract the first droplets 4a and the second droplets 4b scattered under the ejection path Ia by the influence of gravity. In particular, when the spot diameter is large (when the amount of liquid droplets is large), when the optical film F10X is transported in the up-down direction, the number of droplets scattered below will increase, so it is set to only the second suction mechanism. The actual benefit of 62 (only the actual benefit of placing the attraction mechanism below the injection path Ia) becomes larger.

In the above-mentioned embodiment, an example has been described in which only the second suction mechanism 62 is arranged in the vertical direction below the ejection path Ia from which the ink 4i is ejected, but it is not limited to this. For example, as shown in FIG. 16, the suction device 60 may include a first suction mechanism 61 disposed on one side across the ejection path Ia from which the ink 4i is ejected, and a second suction mechanism 61 disposed on the other side via the ejection path Ia. Attraction mechanism 62. That is, the suction mechanisms 61 and 62 may be arrange | positioned on both sides via the injection path Ia. Thereby, the first droplet 4a and the second droplet 4b which are scattered to both sides via the ejection path Ia can be effectively attracted with a simple structure.

In addition, the first suction mechanism 61 may be disposed above the injection path Ia in the vertical direction, and the second suction mechanism 62 (equivalent to the second suction mechanism 62 of the above embodiment) may be disposed in the vertical direction. The injection path Ia is further below. Thereby, the first droplet 4a and the second droplet 4b which are scattered to the upper and lower sides via the ejection path Ia can be effectively attracted with a simple structure.

The first suction mechanism 61 attracts the first droplets 4a and the second droplets 4b scattered above the ejection path Ia, and the second suction mechanism 61 attracts the first droplets 4a and the second droplet 4b scattered below the ejection path Ia. The droplets attracted by the first suction mechanism 61 are transferred in the direction of the arrow Q1 through the piping, and the droplets attracted by the second suction mechanism 62 are transferred in the direction of the arrow Q2 through the piping. Store in a slot (not shown).

[Third embodiment]

The configuration of a marking device according to a third embodiment of the present invention will be described below. FIG. 17 is a schematic diagram showing a marking device 304 according to the third embodiment, and is a schematic diagram including a cross section corresponding to FIG. 8. In this embodiment, the same components as those in the first embodiment and the second modification of the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

As shown in FIG. 13, in the first embodiment, an example has been described in which the marking device 4 includes a droplet ejection device 20, a shielding plate 30, a fixing member 40, and a scattering restricting member 50. As shown in FIG. In the second modification of the one embodiment, the example in which the shielding plate 130 is separated from the emission surface 22 in the configuration in which the fixing member 140 and the shielding plate 130 are integrated by the same member has been cited. On the other hand, as shown in Fig. 17, in the present embodiment, the marking device 304 includes a droplet ejection device 20, a fixing member 340, and a suction device 360.

The fixing member 340 and the shielding plate 330 are integrally formed by the same member. The fixing member 340 is fixed to the injection head 20A 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 340 is formed of a metal plate such as SUS.

The shielding plate 330 is separated from the emission surface 22. Specifically, the second main surface 335 of the shielding plate 330 is disposed more forward (+ x direction) than the emission surface 22. By separating the shielding plate 330 from the emission surface 22, the shielding plate 330 can also function as a scattering limiting member described above. Specifically, by separating the shielding plate 330 from the emitting surface 22, the second main surface 335 (the surface on the emitting surface 22 side) of the shielding plate 330 can restrict the first droplet 4a from moving toward the optical film F10X side, and the shielding plate The first main surface 332 (the surface on the optical film F10X side) of 330 can restrict the second droplet 4b from moving toward the emission surface 22 side.

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

In this embodiment, a guide roller 7 is provided in contact with the optical film F10X. The liquid droplet ejection apparatus 20 of this embodiment is disposed on the guide roller 7 so as to face each other with the optical film F10X interposed therebetween while the optical film F10X is being conveyed. The droplet ejection device 20 ejects the ink 4i from the opposite side of the position where the optical film F10X is in contact with the guide roller 7 (see FIG. 4).

The optical film F10X is preferably wound around the outer peripheral surface of the guide roller 7 in an angle range of 40 ° to 130 ° (hereinafter referred to as "wrapping angle θ"). The wrapping angle is a value that represents the angular range of the portion of the optical film F10X that is in contact with the outer peripheral surface of the guide roller 7 in the circumferential direction with the center angle of the guide roller 7.

The reason is that when the wrapping angle θ is less than 40 °, the optical film F10X easily slides on the outer peripheral surface of the guide roller 7, and there is a possibility that scratches and the like occur on the optical film F10X. When it exceeds 130 °, for example, bubbles may easily enter between the surface protective film and the polarizing film.

When the tension applied to the optical film F10X is small, the envelope angle θ is preferably a value exceeding 90 °, and more preferably 95 ° or more. Although the smaller the tension applied to the optical film F10X, the more likely it is that chattering occurs, but by setting the wrapping angle θ to more than 95 °, even when the tension applied to the optical film F10X is small, It is possible to suppress chattering occurring in the optical film F10X. On the other hand, when the tension applied to the optical film F10X is large, the envelope angle θ is preferably set to less than 90 °, and more preferably set to 85 ° or less. Thereby, even when the tension applied to the optical film F10X is large, it is possible to suppress the optical film F10X from coming into close contact with the outer peripheral surface of the guide roller 7.

In addition, the conveyance speed of the optical film F10X is generally a value in a range of 9 m / min to 50 m / min. The tension applied to the optical film F10X is a value in the range of 400N to 1500N in the drying furnace, and a value in the range of 200N to 500N in the drying furnace. The width of the optical film F10X is set to a value in a range of 500 mm to 1500 mm, and the thickness of the optical film F10X is set to a value in a range of 10 μm to 300 μm. The larger the width of the optical film F10X, or the thinner the thickness of the optical film F10X, the more prone to chattering.

For example, the outer diameter of the guide roller 7 is preferably a value in a range of 100 mm to 150 mm. This reason is that when the outer diameter of the guide roller 7 is increased, although the area where the optical film F10X contacts the outer peripheral surface of the guide roller 7 with respect to the enclosing angle θ becomes larger, vibrations occurring in the optical film F10X can be suppressed. However, when the outer diameter of the guide roller 7 is excessively increased, the above-mentioned scratches and the invasion of air bubbles easily occur on the optical film F10X.

For example, the roundness of the guide roller 7 is preferably a value of 1.0 mm or less, and more preferably a value of 0.5 mm or less. This reason is because the smaller the roundness of the guide roller 7 is, the more it is possible to suppress the vibration caused by the optical film F10X coming into contact with the guide roller 7.

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

Furthermore, from the viewpoint of more effectively suppressing chattering occurring in the optical film F10X, a guide roller in contact with the optical film F10X may be additionally provided on the upstream side and the downstream side of the guide roller 7. In addition, the optical film F10X may have a wrapping angle with respect to the added guide roller.

The guide roller 7 is capable of advancing and retreating in a direction V2 that intersects the conveying direction V1 of the optical film F10X. For example, a cylinder mechanism or the like may be attached to the guide roller 7 so that the guide roller 7 can be moved in an oblique direction such as front downward, rear upward, and the like. Thereby, workability | operativity can be improved from a viewpoint of paper feedability, a connection part, a head cleanliness, etc.

Specifically, from the viewpoint of paper-passing property, it means that when the optical film F10X is conveyed (at the time of passing) from a state where the optical film F10X is not conveyed to the conveying line 9 (passed state), it is added by The distance between the wide marking device 304 and the guide roller 7 improves workability.

Next, it demonstrates from a seam point of view. When the raw material rolls R1 and R2 are exchanged, a connecting portion occurs when the optical film F10X is connected with an adhesive tape or the like. The thickness of the connected portion in the optical film F10X is larger than the thickness of the ordinary portion (thickness of the unconnected portion). This means that even in such a case, the guide roller 7 can still be moved, thereby avoiding the contact between the seam portion and the marking device 304, and the optical film F10X can be transported to the conveying line 9 to improve work Sex.

In addition, the term "head cleaning" means cleaning of the head, and since the guide roller 7 can be moved, the working space can be widened, so that workability can be improved.

Further, the droplet ejection device 200 may be advanced or retracted in a direction (for example, a front-rear direction) that intersects with the transport direction V1 of the optical film F10X.

The symbol Va in FIG. 17 shows a portion (hereinafter, referred to as a “opposing portion”) where the fixing member 340 including the ejection path Ia (see FIG. 9) that ejects the ink 4i faces the guide roller 7.

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

The first suction mechanism 361 is formed with a suction surface 361f which is inclined forward and downward so as to face the facing portion Va. The second suction mechanism 362 is formed with a suction surface 362f which is inclined downward and rearward so as to face the facing portion Va. The suction surfaces 361f and 362f are formed with suction holes (not shown) for attracting the first droplets 4a and the second droplets 4b. 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 roller 7.

According to this embodiment, the taper having the inclined surface 336 a inclined with respect to the normal 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 of the opening 331 of the shielding plate 330. The shaped portion 336 can receive the first droplet 4a by the inclined surface 336a, so that the first droplet 4a can be avoided from being split. When it is assumed that the tapered portion is not formed at the edge portion on the exit surface 22 side of the opening portion 331 of the shielding plate 330, the boundary portion between the inner wall surface 331a of the opening portion 331 and the second main surface 335 of the shielding plate 330 has a cross-sectional observation. The lower part is a corner of about 90 °, so there is a possibility that the first droplet 4a scattered when the ink 4i is ejected from the ejection hole 21 may crack at the corner.

In addition, since the suction device 360 includes the first suction mechanism 361 disposed on one side via the opposing portion Va, and the second suction mechanism 362 disposed on the other side via the opposing portion Va, a simple method can be used. It is comprised so that the 1st droplet 4a and the 2nd droplet 4b which are scattered to both sides via the opposing part Va are attracted effectively.

Further, the first suction mechanism 361 is arranged above the opposing portion Va in the vertical direction, and the second suction mechanism 362 is arranged below the opposing portion Va in the vertical direction, so that it can be effective with a simple structure. The ground attracts the first droplets 4a and the second droplets 4b which are scattered to the upper and lower sides via the opposing portion Va.

In addition, 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 roller 7, so that the suction can be performed. Since the hole is close to the emission 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 attracted. Furthermore, by bringing the suction hole close to the dripping position of the ink 4i, the second droplet 4b can be more effectively sucked.

In addition, since the droplet ejection device 20 is disposed opposite to the guide roller 7 that is in contact with the optical film F10X via the optical film F10X while the optical film F10X is being transported, the occurrence of the occurrence of the optical film F10X can be suppressed The droplet ejection device 20 and the fixing member 340 are arranged in the state of the above-mentioned tremor, so that the shielding plate 330 and the shielding member 330 of the fixing member 340 can be reduced as much as possible within a range where the shielding plate 330 does not contact the optical film F10X. The interval between the emission surfaces 22 is to minimize the diffusion range of the droplets 4a.

In addition, by minimizing the distance between the suction surface of the suction mechanism 361 and 362 and the opposite portion Va within the range where the suction mechanism 361 and 362 do not suck into the optical film F10X, the droplets 4a and 4b can be absorbed to the maximum extent. .

Furthermore, even if the fixing member 340 (shielding plate 330) is not provided, the injection hole of the injection head 20A can be made as small as possible within a range where the emission surface 22 does not contact the optical film F10X. The distance between 21 and the optical film F10X is to minimize the diffusion range of the droplet 4a.

The defect inspection system 310 of this embodiment further includes a guide roller 7 that is in contact with the optical film F10X, and the marking device 304 is disposed to face the guide roller 7 through the optical film F10X, and the optical film F10X and the guide roller 7 The ink 4i is ejected on the opposite side of the contact position.

According to this embodiment, the liquid droplet ejection device 20 and the fixing member 340 can be disposed in a state where the chattering that has occurred in the optical film F10X can be suppressed by further including the above-mentioned guide roller 7. Therefore, the shielding plate 330 can be used. Within a range not in contact with the optical film F10X, the distance between the shielding plate 330 and the emitting surface 22 of the fixing member 340 is reduced as much as possible, so that the diffusion range of the droplets 4a can be minimized.

In addition, although the shielding plate 330 is formed into a flat plate shape in this embodiment, that is, the first main surface 332 of the shielding plate 330 is exemplified as a surface parallel to the yz plane, but it is not limited thereto. For example, the portion of the masking plate facing the guide roller 7 may be recessed toward the opposite side of the guide roller 7 to form an arc-shaped surface when viewed in cross section, that is, the first main surface of the masking plate. An arc-shaped surface is formed so as to follow the outer peripheral surface of the guide roller 7. Thereby, compared with the case where the shielding plate 330 is formed in a flat plate shape, since the distance between the shielding plate and the optical film F10X can be further reduced, the diffusion range of the droplets 4a can be reduced more effectively.

In addition, the present invention is not necessarily limited to the above-mentioned embodiment, and various changes can be made without departing from the scope of the present invention.

In the embodiment described above, an example has been described in which the marking device ejects the ink 4i from the optical film F10X conveyed on the conveying line 9 in a direction parallel to the vertical direction from a direction orthogonal to the vertical direction, but it is not limited to this. For example, the marking device may eject the ink 4i toward the optical film F10X conveyed in the horizontal direction from below. Even in this case, compared with the case where the marking device ejects the ink 4i toward the optical film F10X conveyed in the horizontal direction from above, it is possible to suppress the ink 4i from dripping naturally from the ejection hole 21 due to the influence of gravity.

Moreover, in the said embodiment, although the example which demonstrated the example which arrange | positions a scattering restriction plate or a suction mechanism on both sides through the ejection path Ia which ejects the ink 4i was demonstrated, it is not limited to this. For example, when the direction of the wind generated by the conveyance of the optical film F10XZ or the direction of the ejection path Ia of the ink 4i is concentrated, the droplets of the ink 4i are concentrated on one side across the ejection path Ia. A scattering limit plate or a suction mechanism is arranged on one side.

In the above-mentioned embodiment, although the ejection head having a plurality of ejection holes is listed in the droplet ejection device shown in FIG. 7 and the like, it is arranged so as to cover the printing range in the width direction of the optical film F10X. A plurality of examples of the configuration will be described, but it is not limited thereto. For example, a liquid droplet ejection device provided with a single ejection head having one to three ejection holes 21 can also be moved toward the width direction and the conveyance direction of the optical film F10X according to the defect position information from the control device, so that the optical Ink 4i is ejected from the defect position on the film F10X and printed. Furthermore, the scattering limiting plate or the suction mechanism can also be moved to the defect position together with the droplet ejection device, and the droplets of the ink 4i are prevented from contaminating the optical film F10X.

In addition, although the structure in which the said defect inspection system 10 was installed in one part of the film manufacturing apparatus 1 was mentioned as an example, it is not limited to this. The defect inspection system 10 may be provided separately from the film production apparatus 1. For example, the film manufacturing apparatus 1 may not include the defect inspection system 10 described above, and the optical film F10X manufactured in the film manufacturing apparatus 1 may be wound around a core material as a raw material roll R2 of the optical film F10X by a winding unit 8. After that, it is fed to the next step, and a part of the equipment in the next step is provided with the above-mentioned defect inspection system 10.

Furthermore, the film to which the present invention is applicable is not necessarily limited to the optical film of the polarizing film, retardation film, and brightness enhancement film described above, but can be widely applied to the invention which can be applied by a marking device. In the film to be printed.

Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to this example. Various shapes, combinations, and the like of the constituent members shown in the examples described above are examples, and various changes can be made based on design requirements and the like without departing from the spirit of the present invention.

Claims (13)

    A marking device capable of marking information by ejecting liquid droplets onto an optical film, the marking device comprising: a droplet ejecting device having an ejection surface formed with an ejection hole for ejecting the droplets onto the optical film; and a scattering The restricting member is provided between the emission surface and the optical film, and can block the droplets that are scattered after the liquid droplets are ejected from the ejection holes until they drop on the optical film; the scattering restricting member is formed with a direction A blocking surface that extends in a direction that intersects the normal of the exit surface.         The marking device according to item 1 of the scope of patent application, wherein the droplets include a first droplet that is scattered when the droplet is ejected from the injection hole, and a first droplet that is scattered when the droplet is dropped on the optical film. At least one of the two droplets.         The marking device according to claim 1 or claim 2, 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 marking device according to item 3 of the scope of patent application, wherein the scattering restricting plate includes a first scattering restricting plate disposed on one side via an ejection path through which the droplet is ejected, and is disposed across the ejection path. At least one of the second scattering limit plates on the other side.         The marking device according to item 4 of the scope of patent application, wherein the emission path extends in a direction crossing the vertical direction; the first scattering limit plate is disposed above the emission path in the vertical direction; The second scattering-restricting plate is arranged below the emission path in the vertical direction.         The marking device according to item 4 or 5 of the scope of patent application, wherein the first scattering limit plate is formed with a first blocking surface that expands in a direction that intersects the normal line of the exit surface; The second scattering restriction plate is formed with a second blocking surface that extends in parallel with the first blocking surface.         The marking device according to any one of claims 4 to 6 in the scope of patent application, wherein the separation distance between the first scattering limit plate and the second scattering limit plate is larger than the diameter of the injection hole. .         The marking device according to item 5 of the scope of patent application, wherein the scattering limit plate is only the second scattering limit plate.         The marking device according to any one of claims 1 to 8 of the scope of patent application, further comprising: a shielding member provided on the ejection surface and capable of blocking the scattering of the liquid droplets when ejected from the ejection hole. Droplets; the shielding member is formed with an opening formed at a position opposite to the injection hole, and has an inner wall surface that blocks the droplets scattered in a direction intersecting with a normal line of the emission surface.         The marking device according to any one of claims 1 to 9 of the scope of patent application, further comprising: a suction device provided between the exit surface and the optical film, capable of attracting the droplets to be ejected from the exit holes. The droplets scattered after dropping on the optical film.         The marking device according to any one of claims 1 to 10, wherein the liquid droplet ejection device is disposed while the long optical film is transported through the optical film. The droplet is ejected from the opposite side of the position where the optical film and the guide roller are in contact with the guide roller in contact with the optical film.         A defect inspection system comprising: a conveying line for conveying a long strip-shaped film; a defect inspection device for inspecting the defects of a film being conveyed on the aforementioned conveying line; and items 1 to 11 of the scope of patent application The marking device described in any one is capable of marking information by ejecting liquid droplets at the positions of defects based on the results of the aforementioned defect inspection.         A film manufacturing method includes the step of marking using a defect inspection system described in claim 12 of the patent application scope.