TW201843436A - 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 droplets to an area other than a defective portion of a film and improving the yield rate of products, even when splashes scatters from a time when droplets being ejected through an ejection hole to a time when the droplet is landed on an optical film. A marking apparatus capable of marking information by ejecting droplets onto an optical film, the marking device including: a droplet ejection device having an exit surface on which an ejection hole for ejecting droplets onto the optical film is formed, and a suction device which is provided between the exit surface and the optical film and is capable of sucking up splashes scattering from a time when droplets ejected through the ejection hole to a time when it is landed on the optical film.

Description

   Marking device, defect inspection system and film manufacturing method   

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 the 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 recorded on the optical film by printing a bar code on the widthwise end of the optical film or by marking the defective portion . When the winding amount of the optical film system wound around the core material reaches a certain amount, it is cut off from the upstream optical film and shipped as an original fabric roll. Moreover, the optical film was cut out based on the mark applied to the defect part, and the sheet-like object (product) was taken out.

For example, Patent Document 1 has disclosed a defect marking device capable of detecting a partial defect of a sheet-shaped product having a certain width and conveyed in a lengthwise direction perpendicular to the width direction, and assigning a mark to clarify a part of the detected defect. Used scars. On the other hand, Patent Document 2 has exemplified a non-contact printing method such as inkjet 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

The applicant of this case also promoted the development of a marking device capable of marking information by ejecting liquid droplets to an optical film. 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 can be seen that, in such a marking device, due to the characteristics of the size and viscosity of the liquid droplets emitted from the injection holes, droplets are scattered when the liquid droplets are ejected from the injection holes. If droplets are scattered when ejected from the ejection hole, if the scattered droplets adhere to areas other than the defect portion of the optical film, the portion that should have been taken out as a product will be contaminated by the droplets and sometimes have to be The contaminated part is discarded as a defective product, and the yield of the product may be reduced.

The present invention has been developed in view of the above-mentioned circumstances, and provides a mark capable of suppressing droplets from adhering to a region other than a defective portion of a film even when droplets are scattered when ejecting droplets from an injection hole, thereby improving the yield of a product. Device, defect inspection system and film manufacturing method.

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. The marking device includes a droplet ejecting device having a droplet ejecting device formed on the optical film. The exit surface of the injection hole; and a shielding member, which is provided on the exit surface and can block the droplets scattered when the liquid droplet is ejected from the injection hole; the shielding member is formed with an opening portion which is connected with the injection hole The opposite position is open and has an inner wall surface that blocks the droplets scattered in a direction crossing the normal line of the exit surface.

(2) In the marking device according to the above (1), the shielding member may be provided with a shielding plate having a thickness in a direction parallel to a normal line of the emission surface.

(3) The marking device according to the above (2) may further include a fixing member capable of fixing the shielding plate to the droplet ejection device.

(4) In the marking device according to the above (3), the fixing member may further include a first wall portion that covers both the liquid droplet ejection device and the shielding plate at a normal line to the ejection surface. A side end portion in an orthogonal direction; and a second wall portion, which is an outer edge portion of an outer periphery of the opening portion that covers a surface of the shielding plate opposite to the emission surface.

(5) In the marking device according to the above (3), the fixing member may further include a side wall portion that is integrally formed with the shielding plate and covers the liquid droplet ejection device at a position on the ejection surface. A side end in a direction orthogonal to the normal.

(6) In the marking device according to any one of (3) to (5), the liquid droplet ejection device may further include a plurality of ejection heads capable of ejecting the liquid droplets, and the shielding plate is in accordance with the plurality of ejection heads. A plurality of ejection heads are provided, and a plurality of the fixing members are provided in order to fix the shielding plate to each of the plurality of ejection heads.

(7) In the marking device according to any one of (2) to (6), the shielding plate may be in contact with the emitting surface.

(8) In the marking device according to any one of (2) to (6), the shielding plate may be separated from the emitting surface.

(9) In the marking device according to any one of (1) to (8), a diameter of the opening may be larger than a diameter of the injection hole.

(10) In the marking device according to the above (1), the shielding member may include a cylindrical member extending in a direction parallel to a normal line of the emission surface.

(11) In the marking device according to the above (10), the inner diameter of the cylindrical member may be larger than the diameter of the injection hole.

(12) In the marking device according to any one of (1) to (11), a tapered portion may be formed at an edge portion on the side of the exit surface of the opening portion, and the tapered portion It is an inclined surface which inclines with respect to the normal of the said exit surface so that it may face the said exit hole.

(13) In the marking device according to any one of the above (1) to (12), the droplet ejection device may be disposed so that the optical film is interposed therebetween while the long optical film is being conveyed. The droplet is ejected from a side opposite to a guide roll that is in contact with the optical film and from a position opposite to a position where the optical film is in contact with the guide roll.

(14) 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 a film that is conveyed on the conveying line; and ( The marking device described in any one of (1) to (13) is capable of marking information by ejecting a liquid droplet at a defect position based on a result of the aforementioned defect inspection.

(15) In the defect inspection system according to the above (14), the marking device may eject the liquid from a direction intersecting with a vertical direction to a film conveyed on the transportation line in a direction parallel to the vertical direction. drop.

(16) In the defect inspection system according to the above (14), the marking device may eject the liquid droplets from below on a film transported on the transport line in a direction crossing the vertical direction.

(17) The defect inspection system according to any one of (14) to (16) above, which may further include a guide roller in contact with the film; the marking device may be arranged to face each other across the film The liquid droplet is ejected from the guide roller and from a side of the film opposite to a position where the film contacts the guide roller.

(18) In the defect inspection system according to the above (17), the film may be wound around the outer peripheral surface of the guide roller within an angle range of 40 ° or more and 130 ° or less.

(19) A film manufacturing apparatus according to an aspect of the present invention includes the defect inspection system described in (14) to (18) above.

(20) 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 (14) to (18) above.

According to the present invention, it is possible to provide a marking device, a defect inspection system, and a film that can suppress the adherence of the droplets to areas other than the defective portion of the film even when the droplets are scattered when the droplets are ejected from the injection hole, thereby improving the product yield. Production method.

1‧‧‧ film manufacturing equipment

2‧‧‧ Defect inspection device

3‧‧‧ Defect information reading device

4, 204, 304, 404‧‧‧ 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, 410‧‧‧ Defect inspection system

11‧‧‧ defects

12‧‧‧ logo

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, 430‧‧‧ shielding members (shielding panels)

31, 131, 231, 431‧‧‧ openings

31a, 131a, 231a, 431a

32, 432‧‧‧ the first main surface (the surface of the shielding plate opposite to the exit 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, 440‧‧‧Fixed components

41‧‧‧First wall

42‧‧‧Second wall section

50‧‧‧Scattering restriction member

50f‧‧‧occlusion surface

51‧‧‧The first flying limit board

51f‧‧‧First occlusion surface

52‧‧‧Second Scatter Restriction Plate

52f‧‧‧Second occlusion 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, 441‧‧‧ side wall part of fixing member

230‧‧‧ tube member

335‧‧‧Second Major Face

436‧‧‧ cone

436a‧‧‧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‧‧‧ separator

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‧‧‧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‧‧‧ Raw Roll

R2‧‧‧ Raw Roll

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 marking device according to the first embodiment.

Fig. 7 is a front view showing a droplet ejection device, a shielding plate, and a fixing member of 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 modified example of the fixing member, and is a cross-sectional view corresponding to FIG. 8.

FIG. 12 is a schematic view showing a modification 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 a second embodiment.

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

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

FIG. 16 is a schematic diagram for explaining the operation of the suction device in the marking device according to the third embodiment.

FIG. 17 is a schematic view showing a marking device according to a fourth 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 apparatus is used to manufacture a film-like optical member (optical film) made of a resin. Examples of the optical film include a polarizing film, a retardation film, and a brightness enhancement film. For example, the optical film is bonded to a panel-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 optical display parts, optical members, and the like.

In this embodiment, a transmissive liquid crystal display device is exemplified as an optical display device. The transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, 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 displaying an image.

(Optical display device)

First, in the optical display device, the structure of the liquid crystal display surface P shown in FIG. 1 and FIG. 2 will be described. 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. In addition, in FIG. 2, a hatching showing a cross section is omitted.

As shown in FIGS. 1 and 2, the liquid crystal display panel P includes: a first substrate P1; a second substrate P2 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 a transparent substrate having a rectangular shape in a plan view. The second substrate P2 is composed of a rectangular transparent substrate smaller than the first substrate P1. The liquid crystal layer P3 is disposed inside a region which is closed by a sealing material (not shown) between the first substrate P1 and the second substrate P2 and is rectangular 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.

A back surface (backlight source side) of the liquid crystal display panel P is a first optical film F11 as a polarizing film and a third optical film F13 as a brightness enhancement film, which are 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, an optical film including any of the first optical film F11 to the third optical film 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. Note that in FIG. 3, the halftone dots showing the cross section are 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 base material sheet F4; an adhesive layer F5, which is provided on one side of the base material sheet F4 (the upper surface in FIG. 3); and a separator sheet F6, which is provided via 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 is used to adhere the substrate sheet F4 to the liquid crystal display panel P. The separator F6 is used to protect the adhesive layer F5. The separator F6 is 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. The portion obtained by removing the separator F6 from the optical film F1X is referred to as a bonding sheet F8.

The surface protection sheet F7 is used to protect the surface of the substrate sheet F4. The surface protection sheet F7 is 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, either 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 adhesive layer F5 may be directly provided on the polarizer F4a. The protective film F4c on the side of the surface protective sheet F7 may be subjected to a surface treatment such as a hard film treatment to protect the outermost surface of the liquid crystal display panel P, an antiglare treatment to obtain an antiglare effect, and the like. 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 is an optical film F10X in which a surface protective film is laminated 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 as a raw material roll R1 for manufacturing the long strip-shaped optical film F10X; and the marking step is based on the result of defect inspection of the long strip-shaped optical film F10X, and marking is performed at the position of the defect. 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 elongation treatment to a film that is a substrate of a polarizer such as PVA (Polyvinyl Alcohol; polyvinyl alcohol), the film is applied by Protected films such as TAC (Triacetylcellulose) are laminated on both sides of the treated film to produce long polarized films, and raw materials are obtained by winding the manufactured polarized film around a core material. Volume (not shown).

In the bonding step, the strip-shaped polarizing film and the strip-shaped film are rolled out from the roll of the strip-shaped polarizing film and the strip-shaped surface protective film (not shown), respectively. The optical film F10X is formed by holding and bonding the surface protective film with a nip roll, etc., and pulling it out, and rolling the manufactured optical film F10X The core material is wound around to obtain a raw material roll R1. For example, PET (Polyethylene terephthalate) is used as the surface protective film.

In the marking step, the ink 4i (droplet) is ejected at the position of the defect based on the result of the defect inspection, thereby marking 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 portion of the optical film F10X, thereby directly recording at the defect portion.

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 of the optical film F10X, a dot-shaped mark 12 larger than the defect 11 is printed in series. The region MA in the optical film F10X is a region obtained by marking the entire film width direction (hereinafter referred to as a "full-width mark"). 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 of 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 the defective product 13, and the unmarked part is recovered as the defective 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 rolled out from the raw material roll R1. The optical film F10X is subjected to predetermined processing such as defect inspection and marking, and is wound around the core material in the winding unit 8 as a raw material roll R2 after the predetermined processing.

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

The pair of nip rollers 5a and 5b rotate the optical film F10X in the direction opposite to each other while sandwiching the optical film F10X therebetween, thereby pulling out the optical film F10X toward the direction of the arrow V1 (the conveying direction of the optical film F10X) shown in FIG. 4. .

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 acting on the optical film F10X. For example, the accumulator has a structure in which a plurality of tension adjusting rollers on the upper side and a plurality of tension adjusting rollers 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 staggered around the upper tension adjustment roller and the lower tension adjustment roller, the upper tension adjustment roller and the lower tension adjustment roller are moved in a vertical direction relative to each other. The optical film F10X is moved up and down. Thereby, the optical film F10X can be accumulated without stopping the conveyance line 9. For example, the accumulator can 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. On the other hand, it can reduce the tension adjustment on the upper side The distance between the roller and the tension adjustment roller on the lower side reduces the accumulation of the optical film F10X. The accumulator is operated when, for example, the sheet material splicing is performed after the core materials of the raw material rolls R1 and R2 are exchanged.

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

The optical film F10X is sent to the next step after the winding portion 8 is wound around the core material to become the raw material roll R2 after the predetermined processing (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, crossed nicol penetration inspection, and the like for the optical film F10X carried on the transport line. Detect defects of optical film F10X.

For example, the defect inspection device 2 is located on the conveying line 9 on the upstream side than the nip rollers 5a and 5b, and has a plurality of illumination units (not shown) for irradiating the optical film F10X with illumination light, and detecting the transmission through the optical film A plurality of light detecting 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 opposite to each other with the optical film F10X interposed therebetween. 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. When 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 adjusted illumination light, 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 and type of the defect, such as identification codes such as text, barcodes, two-dimensional codes (DataMatrix codes, QR codes (registered trademarks), etc.) To record. The identification code includes, for example, information indicating how far a defect detected by a defect inspection device (not shown) exists in the film width direction from the position of the printed identification code (about 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 print head discharges ink at a position along an end edge portion (end portion) in the width direction of the polarizing film, and prints the defect information.

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 transported.

The defect information reading device 3 reads defect information containing identification information such as characters, barcodes, two-dimensional codes (DataMatrix code, QR code (registered trademark), etc.) including information about the location and type of the defect. . 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 at a distance from the position of the printed identification code along the film width direction ( Information about the location of the defect). When the identification code includes information on the type of the detected defect, the information on the type of the detected defect is obtained by reading the defect information. The defect information (read result) obtained by the defect information reading device 3 is output to the control device 6.

The marking device 4 is 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 spot-shaped mark larger than the defect on the defect portion of the optical film F10X, thereby directly recording at the defect portion.

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

The defect inspection system 10 may be equipped with a range finder (not shown) for measuring the conveyance amount of the optical film F10X. For example, in the case of a range finder, an angular position sensor such as a rotary encoder may be disposed on the nip roller on the transport line 9. The rangefinder measures the amount of conveyance of the optical film F10X according to the amount of rotation displacement of the nip roller that rotates in contact with the optical film F10X. The measurement result of the rangefinder 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 and a hard disk.

The information storage section of the control device 6 stores an operating system (OS) that controls a computer system, and a program that causes each section of the film manufacturing apparatus 1 to execute various processes by an arithmetic processing section. 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. The interface can be connected to an input device such as a keyboard and a mouse, a display device such as a liquid crystal display, a communication device, and the like.

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

(Marking device)

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

Fig. 6 is a perspective view showing a 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 (shielding member), and a fixing member 40. The marking device 4 emits the ink 4i to the optical film F10X, and prints 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 required. Referring to this xyz orthogonal coordinate system, the positional relationship of each component will be described. In this embodiment, the normal direction of the exit surface 22 of the droplet ejection device 20 is set to the x direction, and the direction in the plane of the exit surface 22 orthogonal to the x direction (the width direction of the exit surface 22) is set to the y direction. Let the direction orthogonal to the x-direction and the y-direction be the z-direction. Here, the x-direction and the y-direction are positioned in a horizontal plane, and the z-direction is positioned in a vertical direction (up and down direction). The x-direction is sometimes called the front-back direction, and the y-direction is sometimes called 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 on the conveying line 9 in a direction V1 (upper) parallel to the vertical direction. For example, the conveyance speed (hereinafter referred to as "line speed") of the optical film F10X is a value of 50 m / min or less in a range where 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 appropriately omitted.

As shown in FIG. 7, the liquid droplet ejection apparatus 20 includes a plurality of ejection heads 20A capable of ejecting ink. Although FIG. 7 shows three injection heads 20A as an example, 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 into a rectangle with long sides in the y direction when viewed from the front of FIG. 7.

The shielding plate 30 is provided with a plurality of each of the plurality of ejection heads 20A. Although FIG. 7 illustrates three shielding plates 30 provided by each of the three ejection heads 20A as an example, the number of the shielding plates 30 is not limited to this, and can be set in accordance with the number of the ejection heads 20A, and can be set according to One, two, or four or more are appropriately set as needed. The surface 32 (hereinafter referred to as the "first principal surface") of the shielding plate 30 opposite to the emission surface 22 is a rectangular shape having substantially the same size as the emission surface 22 when viewed from the front in FIG. 7.

The fixing members 40 are provided in order to be able to fix the shielding plate 30 to each of the plurality of ejection heads 20A. In FIG. 7, although three fixing members 40 are provided as an example for fixing the shield plate 30 to each of the three injection heads 20A, the number of the fixing members 40 is not limited to this, and can be matched with the injection head. The number of 20A and the number of the shielding plates 30 is set, and one, two, or four or more can be appropriately set as required. The fixing member 40 has a rectangular frame shape that is shaped along the first main surface 32 of the shielding plate 30 when viewed from the front 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") of the dot-shaped mark 12 printed on the optical film F10X. The diameter ") 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 to 0.2 µL. 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 within a range of 1 m / s or more and 10 m / s or less in terms of the range in which printing is possible. It is a value in the range of 4 m / s or more and 5 m / s or less. 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, the target printing area of the optical film F10X during transportation can be printed with high accuracy, and the droplets at the time of ink spray can be suppressed (for example, as shown in Figure 14). The occurrence of the second droplet 4b) shown. Here, the so-called "spraying of ink" means that the ejected ink 4i contacts the optical film F10X, so that the shape of the ink 4i collapses and is printed on the optical film F10X.

For example, the opening time of the ejection hole 21 of the ejection head 20A is a value in a range of 0.5 ms or more in terms of the range in which the mark 12 can be printed on the optical film F10X, and preferably 0.8 ms or more and 1.5 A value in a range of ms or less is more preferably a value in a range of 0.9 ms or more and 1.2 ms or less. 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 ejected can be stabilized, the target dot diameter can be made, 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 a value within a range of 0.030 MPa or less in a range where the mark 12 can be printed on the optical film F10X. The value is preferably set in a range of 0.020 MPa to 0.28 MPa. 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 droplets 4a during ink ejection and droplets during ink ejection 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 such that the range in which the mark 12 can be printed on the optical film F10X is set to a value of 50 mm or less. The value is preferably 5 mm or more and 15 mm or less. Because the distance K1 is set to be too small, the ejection head 20A may contact the optical film F10X. When the distance K1 is set to be too large, the droplets scattered when the ink is ejected from the ejection hole 21 may expand widely. In this embodiment, the distance K1 is set to about 13 mm. The distance K1 is a length of a line segment formed by connecting the center of the exit hole 21 of 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 caused by the transportation of the optical film F10X is a value in a range of 0.5 m / s or less in the range in which the mark 12 can be printed on the optical film F10X. The value is set in a range of 0.2 m / s or less. In this embodiment, the above-mentioned wind speed is set to 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 (droplet ejection device 20) is formed with a plurality of ejection holes 21 that eject ink into the optical film F10X. The plurality of injection holes 21 are arranged at the center of the emission surface 22 in the up-down direction (z direction), and are arranged in a row along the width direction (y direction) of the emission surface 22. Although FIG. 7 shows that there are nine injection holes 21 in each injection surface 22 as an example, in this embodiment, sixteen injection holes 21 are formed in each injection surface 22. In addition, the number of the injection holes 21 is not limited to this, and a number of eight or less or a number of ten or more can be appropriately set as needed. The arrangement of the injection holes 21 is not limited to one row, and 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 can be made as large as possible in a range where the shielding plate 30 does not touch 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 that 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 from which the ink 4i is ejected. 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 blocks the droplets 4 a that are scattered when the ink 4 i is ejected from the ejection hole 21 in a direction crossing the normal line of the ejection surface 22. At least a part of the scattered droplets 4 a is attached to the inner wall surface 31 a of the opening 31.

As shown in FIG. 7, a plurality of openings 31 are provided in accordance with each of the plurality of ejection holes 21. The plurality of openings 31 are located at the center of the first main surface 32 in the up-down direction (z direction), and are arranged in a row along the width direction (y direction) of the first main surface 32. Although FIG. 7 illustrates that each of the shielding plates 30 has nine openings 31 as an example, in this embodiment, each of the shielding plates 30 is provided with sixteen injection holes 21 to provide sixteen openings 31. Furthermore, the number of the openings 31 is not limited to this, and 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, and 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. In addition, the aforementioned distance L1 can be made as small as possible within a range where the shielding plate 30 does not touch 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 (PP) plate. In this embodiment, the shielding plate 30 is formed of an acrylic plate. In addition, the shielding plate 30 may be formed of a plate material that does not respond to ink. This can suppress the corrosion of the shielding plate 30 caused by the ink, and thus can improve the corrosion resistance of the shielding plate 30.

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 of both the emission head 20A and the shielding plate 30 in a direction orthogonal to the normal line of the emission surface 22. 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 (z direction) of the shielding plate 30 And both of the lateral end portions 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 of 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 of the first main surface 32 of the shielding plate 30. For example, the second wall portion 42 is formed integrally with the same member as the first wall portion 41. The second wall portion 42 may be 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).

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 exit surface 22 of the ejection hole 21 of the ink 4i; and the shielding plate 30 is provided on the exit surface 22 and can block the droplets 4a scattered when the ink 4i is ejected from the ejection hole 21; the shield plate 30 is formed with an opening portion 31, which The opening portion 31 is opened at a position facing the injection hole 21 and has an inner wall surface 31 a that blocks the droplets 4 a scattered in a direction crossing the normal line of the emission surface 22.

According to the present embodiment, the shielding plate 30 is formed with an opening portion 31 that is opened at a position opposite to the injection hole 21 and has an inner wall surface 31a that blocks the droplets 4a scattered in a direction that intersects the normal line of the emission surface 22. Compared with the case where the shielding plate 30 is provided and the ink 4i is directly ejected from the droplet ejection device 20, the diffusion range of the droplets 4a scattered in a direction crossing the normal line of the ejection surface 22 can be reduced. Specifically, the droplets can be reduced. The scattering diameter L2 centered on the mark 12 when the film 4a is attached to the optical film F10X (see FIG. 9). Therefore, even if the ink 4i is scattered when the ink 4i is ejected from the injection hole 21, the defect that the film 4a is adhered to the optical film F10X is suppressed. The area other than the part can 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 to the optics can be suppressed. The area other than the defect site of the 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 touch the optical film F10X, the diffusion range of the droplets 4a can be minimized.

In addition, since the fixing member 40 capable of fixing the shielding plate 30 to the liquid droplet ejection device 20 is further provided, the shielding plate 30 is more easily fixed to the liquid droplet ejection device 20 than when the fixing member 40 is not provided.

Since the fixing member 40 includes the first wall portion 41 and the second wall portion 42, the first wall portion 41 covers both the emission head 20A and the shielding plate 30 and is orthogonal to the normal line of the emission surface 22. Side end portions 23 and 33 in the direction, and the second wall portion 42 is an outer edge portion 34 that covers the outer periphery of the opening portion 31 of the first main surface 32 of the shielding plate 30, and can firmly fix the shielding plate 30 to the injection head 20A. In addition, a simple structure can be used to restrict the relative movement of the ejection head 20A and the shielding plate 30 in the left-right up-down direction (xyz direction).

In addition, the droplet ejection device 20 includes a plurality of ejection heads 20A capable of ejecting the ink 4i, and a plurality of shielding plates 30 are provided in accordance with each of the plurality of ejection heads 20A. Each of the injection heads 20A is respectively fixed and provided with a plurality of them, and the shielding plate 30 and the fixing member 40 can be positioned in a one-to-one relationship with each injection head 20A. Therefore, it corresponds to the installation of a size and a plurality of injection heads 20A. Compared with the case of the shielding plate and the fixing member, the relative positional deviation of the injection head 20A, the shielding plate 30, and the fixing member 40 can be suppressed.

Furthermore, since 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 plate 30 is separated from the emission surface 22.

Furthermore, since the diameter d1 of the opening portion 31 is set to be larger than the diameter d2 of the injection hole 21, it is possible to prevent the ink 4 i emitted from the injection hole 21 from touching the opening portion 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 ejects 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.

According to this embodiment, since the marking device 4 is provided, even if the ink droplets 4a are scattered when the ink 4i is ejected from the injection hole 21, the adhesion of the droplets 4a to areas other than the defect portion of the optical film F10X is suppressed, and the yield of the product can be improved. In addition, because the ink 4i is ejected at the position of the defect 11 based on the result of the defect inspection, the marking device 4 can be printed on the mark 12 and the mark 12 can be printed on the position of the defect, so the droplet 4a can be effectively suppressed. Adhesion to the area other than the defect portion of the optical film F10X can further improve the yield of the product.

In addition, since the marking device 4 is an optical film F10X conveyed on the conveying line 9 in a direction parallel to the vertical direction, the ink 4i is ejected from a horizontal direction orthogonal to the vertical direction, and the optical device F10X conveyed in a horizontal direction with the marking device 4 Compared with the case where the film F10X ejects the ink 4i downward in the vertical direction, the ink 4i can be prevented from dripping naturally from the ejection hole 21 due to the influence of gravity.

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

According to this embodiment, since the above-mentioned defect inspection system 10 is provided, even if the droplets 4a are scattered when the ink 4i is ejected from the ejection hole 21, the droplets 4a are prevented from adhering to areas other than the defect portion of the optical film F10X, and the yield of the product can be improved. In addition, since the mark 12 is printed by aligning the position of the defect, it is possible to effectively suppress the droplet 4a from adhering to a region other than the defect portion of the optical film F10X, and further improve the yield of the product.

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

According to this embodiment, even if the droplets 4a are scattered when the ink 4i is ejected from the injection hole 21, the droplets 4a are prevented from adhering to areas other than the defect portion of the optical film F10X, and the yield of the product can be improved. In addition, since the mark 12 is printed by aligning the position of the defect, it is possible to effectively suppress the droplet 4a from adhering to a region other than the defect portion of the optical film F10X, and further improve the yield of the product.

In addition, in terms of the scattering of the droplets when the ink is ejected from the ejection hole, (A1) the amount of droplets, (A2) the viscosity of the ink, and the like can be considered.

The above factors will be described below.

From the review by the present inventors, it can be seen that if the amount of droplets is small, it can be considered that droplets hardly scatter when the ink is ejected from the ejection holes, or even if the droplets scatter, the effect of contaminating the optical film is still small. On the other hand, when the amount of liquid droplets is large, droplets are scattered when the ink is ejected from the injection hole, and the scattered droplets can contaminate the optical film.

For example, in a commercially available inkjet printer, since the amount of droplets is as small as about 1 × 10 ^-6 μL, it is considered that droplets hardly scatter when the ink is ejected from the ejection hole, or, Even if the droplets are scattered, the influence 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. Compared with a commercially available inkjet printer, the amount of liquid droplets is quite large, so when ejecting ink from the ejection holes The droplets are scattered, and the scattered droplets can contaminate the optical film.

Further, from the review by the present inventors, it can be seen that if the viscosity of the ink is large, it is considered that the droplets are hardly scattered when the ink is ejected from the ejection hole. On the other hand, 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. Therefore, when ejecting ink from an ejection hole The droplets are scattered, and the scattered droplets can contaminate the optical film.

Even if the droplets are scattered when the ink is ejected from the ejection hole due to the above factors (A1), (A2), etc., according to this embodiment, since the shielding plate 30 is formed with an opening portion, the opening portion is opposite to the ejection hole 21 Compared with the case where the inner wall surface 31a of the droplets 4a scattered in a direction intersecting the normal line of the ejection surface 22 is opened toward the open position, the ink 4i is directly ejected from the droplet ejection device 20 without the shielding plate 30. Since the diffusion range of the droplets 4a scattered toward the direction intersecting the normal of the emission surface 22 can be reduced, specifically, the scattering diameter L2 centered on the mark 12 when the droplets 4a are attached to the optical film F10X can be reduced (see (Fig. 9). Therefore, it is possible to effectively suppress the droplet 4a from adhering to a region other than the defect portion of the optical film F10X, and further improve the yield of the product.

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 embodiment, the series of lifting fixing members 40 are formed of members different from the shielding plate 30. In contrast, in this modification, as shown in FIG. 10, the fixing member 140 is integrally formed of the same member as the shielding plate 30.

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 of the emission head 20A in a direction orthogonal to the normal line of the emission surface 22. 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 exit surface 22 side of the side end portion 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. The shielding plate 130 is formed with an opening portion 131 which is opened at a position facing the injection hole 21 and has an inner wall surface 131 a that blocks 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, since the fixing member 140 is integrally formed with the shielding plate 130 and includes a side wall portion 141 for covering the side end portion 23 of the emission head 20A in a direction orthogonal to the normal line of the emission surface 22, Therefore, the shielding plate 130 can be firmly fixed to the injection head 20A, and the relative movement of the injection head 20A and the shielding plate 130 forward, backward, left and right, and up and down (xyz) directions can be restricted by a simple structure. In addition, 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 modified example 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 further 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 defect portion of the optical film F10X can be suppressed. Outside the area. For example, by increasing the distance between the shielding plate 130 and the emission surface 22 as much as possible within a range where the shielding plate 130 does not touch 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 abuts on the emission surface 22, even if the thickness t1 of the shielding plate 130 is not adjusted, the diffusion range of the droplets 4a can be adjusted only by adjusting the interval between the shielding plate 130 and the emission surface 22, which can improve the Design freedom.

(Modification of shielding member)

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

In the said embodiment, the example provided with the shielding plate 30 which has thickness in the direction parallel to the normal line of the emission surface 22 as an example of a shielding member was mentioned. 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 (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 extending 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 (length in the x direction) of the cylindrical member 230, so that the diffusion range of the droplets 4a can be suppressed. The droplets 4a are adhered to a region 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 touch the optical film F10X, the diffusion range of the droplets 4a can be minimized.

In addition, since the diameter of the opening portion 231 is larger than the diameter of the injection hole 21, it is possible to prevent the ink 4 i 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. 13 is a perspective view showing a marking device 204 according to a second embodiment. FIG. 14 is a schematic diagram including an enlarged view of the main part of FIG. 13 and illustrating the function of the scattering restricting member 50 in the marking device 204 according to the second embodiment. Note that the illustration of the fixing wall portions 53 and 54 is appropriately omitted in FIG. 14. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

In the first embodiment, as shown in Fig. 6, an example in which the marking device 4 includes a droplet ejection device 20, a shielding plate 30, and a fixing member 40 has been described. On the other hand, in this embodiment, as shown in FIG. 13, the marking device 204 further includes a scattering restriction 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 restricting member 50 is located further forward than the shielding plate 30 and is provided between the fixing member 40 and the optical film F10X. The scattering restricting member 50 is a barrier against the scattering of the ink 4i from the ejection hole 21 until it is sprayed on the optical film F10X. The droplets include at least one of the first droplets 4a scattered when the ink 4i is ejected from the injection hole 21 and the second droplets 4b scattered when the ink 4i is sprayed 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, the droplets scattered from the time when the ink 4i is emitted from the ejection hole 21 to the time when it is sprayed on the optical film F10X. In addition to the droplets 4a and 4b generated when the ink is ejected or sprayed, the ink 4i may be directed from the exit hole 21 Flying droplets of optical film F10X in flight. However, compared with the droplets 4a and 4b generated when the ink is ejected and sprayed, the droplets scattered by this ink 4i during flight are smaller, and the size of the droplets is also very small. The effect of the degree of the subject is less.

The first droplet 4 a is a droplet that does not adhere to the inner wall surface 31 a of the opening 31 of the shielding plate 30 and passes through the opening 31 and floats in the air. In addition, the droplet system formed by the ink 4i scattering during flight has the same operation form as the first droplet 4a.

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

In addition, the shielding surface 50f is not limited to extend in a direction orthogonal to the normal line of the emission surface 22, and may extend in a direction that intersects the normal line of the emission surface 22. For example, from the viewpoint of effectively blocking the first droplets 4a and the second droplets 4b, the blocking surface 50f is preferably such that the area facing the optical film F10X is maximized, and the direction is parallel to the film conveying direction. And the direction orthogonal to the normal of the emission surface 22 expands. When the above relationship cannot be maintained due to the layout of the equipment, the angle formed by the normal of the shielding surface 50f and the emission surface 22 may be adjusted so as to be as parallel to the film transport direction as possible.

As shown in FIG. 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 this embodiment, the thickness of the scattering restriction plates 51 and 52 is set to about 3 mm. In addition, the thickness of the scattering restriction plates 51 and 52 can be appropriately set as required, as long as it is set to a level that can block the first droplet 4a and the second droplet 4b.

The scattering restriction plates 51 and 52 are rectangular shapes having long sides in the film width direction (y direction shown in FIG. 13) and short sides in the film conveying direction (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 shielding surface 51f that expands in a direction orthogonal to the normal to the emission surface 22, and the second scattering-restricting plate 52 is formed with a second shielding plate 51 that extends in parallel with the first shielding surface 51f. Shielding 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. This is because the slit interval s1 is set too small, and the ink 4i cannot pass through the slit interval s1, that is, there is a possibility that the ink 4i touches the first scattering restriction plate 51 and the second scattering restriction plate 52, and the slit interval is set. When s1 is set too large, the first droplet 4a from the injection hole 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 upward so as to be rearward (-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 restriction plate 51 and the left and right side ends of the upper wall portion 53a, and are inclined toward the rear side (-x direction side). After being offside, he flexed toward the rear and extended. 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 to the left and right 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 shielding 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 shielding 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 shielding 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 is because the distance between the shielding surface and the optical film is set too small, and the scattering restriction member 50 may contact the optical film F10X. When the distance between the shielding surface and the optical film is set too large, the shielding surface 50f may not be used. To limit the possibility of movement of the second droplet 4b. In this embodiment, the distance between the shielding surface and the optical film is set to about 3 mm.

The shielding 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 shielding 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 shielding surface and the emission surface") is preferably a value of 3 mm or more. In this embodiment, the distance between the shielding surface and the emission surface is set to about 10 mm. This is because the distance between the shielding surface and the emitting surface is too small, and there is a possibility that the movement of the second droplet 4b cannot be restricted by the shielding surface 50f. When the distance between the shielding surface and the emitting surface is too large, it is necessary to add Large 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 restriction member 50 is formed of an acrylic plate. The scattering restriction member 50 may be formed of a plate material that does not react with ink. As a result, corrosion of the scattering-limiting member 50 caused by the ink can be suppressed, so that the corrosion resistance of the scattering-limiting member 50 can be improved.

According to this embodiment, between the emission surface 22 and the optical film F10X, one of the first droplets 4a that can block the ink 4i scattering when ejected from the injection hole 21 and the second droplet 4b that is scattered when the ink 4i is sprayed on the optical film F10X are provided. At least one scattering restriction member 50, and the scattering restriction member 50 is formed with a shielding surface 50f extending in a direction orthogonal to the normal of the emission surface 22, and the ink is directly ejected from the droplet ejection device 20 without the scattering restriction member 50 being provided. Compared with the situation, the first droplet 4a can be restricted from moving toward the optical film F10X side between the exit surface 22 and the optical film F10X, and the second droplet 4b can be restricted from moving toward the exit surface 22 side, so even if the ink 4i is from the exit hole 21 The first droplet 4a scatters during ejection, or the second droplet 4b scatters when the ink 4i is sprayed on the optical film F10X. It still inhibits the first droplet 4a and the second droplet 4b from adhering to the area other than the defect portion of the optical film F10X. Improve product yield.

In addition, since the scattering restriction member 50 is provided with scattering restriction plates 51 and 52 having a thickness in a direction (x direction) parallel to the normal to the emission surface 22, the scattering restriction plates 51 and 52 can be adjusted to increase the scattering restriction. The 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 ejection ink 4i, and a second scattering restriction plate 52 disposed on the other side via the emission path Ia. A simple structure can be used to effectively block the first droplets 4a and the second droplets 4b scattered to both sides across the ejection path Ia.

In addition, since 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, a simple configuration can be used. The first droplets 4a and the second droplets 4b scattered to the upper and lower sides across the ejection path Ia are effectively blocked.

In addition, the first scattering-restricting plate 51 is formed with a first shielding surface 51f that expands in a direction orthogonal to the normal to the emission surface 22, and the second scattering-restricting plate 52 is formed with the first shielding surface 51f expanding in parallel. Compared with the case where the first shielding surface 51f and the second shielding surface 52f intersect with each other, the movement of the first droplet 4a between the exit surface 22 and the optical film F10X toward the optical film F10X side is restricted. Of the two restrictions on the movement of the second droplet 4b toward the emission surface 22 side, the restriction can be effectively made without deviating to either side.

Moreover, since the slit interval s1 is set larger than the diameter d2 of the injection hole 21, it is possible to prevent the ink 4i from touching the first scattering restriction plate 51 and the second scattering restriction plate 52.

In the above-mentioned embodiment, an example has been described in which the first scattering restriction plate 51 and the second scattering restriction plate 52 are arranged on both sides across the emission path Ia, but the invention is not limited to this. For example, the scattering restricting plate may be arranged only below the emission path Ia from which the ink 4i is ejected in the vertical direction. As a result, compared with the case where the first scattering restriction plate 51 and the second scattering restriction plate 52 are arranged on both sides via the emission path Ia, the number of parts can be reduced and the cost can be reduced with a simple structure. The first droplets 4a and the second droplets 4b scattered toward the lower side than the ejection path Ia are blocked by the effect 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, more droplets are scattered downward, so only the scattering-restricting plate is disposed in the emission path. The effect of Ia further down is greater.

On the other hand, in terms of the scattering of the droplets when the ink is sprayed on the optical film (printing target), (B1) dot diameter (droplet amount), (B2) ink viscosity, and (B3) printing target can be considered. , (B4) line speed, etc.

The above factors will be described below.

From the review by the present inventors, it is known that if the dot diameter is extremely small (the droplet amount is small), it is considered that droplets will hardly scatter when the ink is sprayed on the printing object, or even if the droplets are scattered, the effect of contaminating the printing object will still be affected. Rarely. On the other hand, when the dot diameter is large (the number of droplets is large), droplets will be scattered when the ink is sprayed on the printing object, and the scattered droplets will contaminate the printing object.

For example, in a commercially available inkjet printer, the dot diameter can be estimated to be about 1 × 10 ^-6 μL due to the extremely small dot diameter of about 20 μm. Therefore, it is considered that there is almost no droplet when the ink is sprayed on the print object. The scattering, or even if the droplets are scattered, has little effect on the degree of pollution of the printed object. On the other hand, in the droplet ejection device 20 of this embodiment, the dot diameter is a value in the range of 1 mm to 10 mm, and the estimated droplet volume is about 0.166 μL, which is compared with a commercially available inkjet printer. Because the dot diameter is quite large (the liquid droplet volume is quite large), droplets will be scattered when the ink is sprayed on the printing object, and the scattered droplets will pollute the printing object.

Moreover, from the review by the present inventors, it can be known that if the viscosity of the ink is large, it can be considered that the droplets hardly spread when the ink is sprayed on the printing object. On the other hand, when the viscosity of the ink is small, the droplets will be scattered when the ink is sprayed on the printing object, and the scattered droplets will pollute 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 relatively small compared with a commercially available inkjet printer, so the ink is sprayed on the print The droplets will be scattered when the object is scattered, and the scattered droplets will pollute the printed object.

Further, from the review by the present inventors, it can be seen that if the printing target is a paper medium such as recording paper, it is considered that droplets hardly spread when the ink is sprayed on the printing target. On the other hand, when the printing object is an optical film including PVA and TAC, droplets will be scattered when the ink is sprayed 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 according to the present embodiment, the printing target is an optical film, so when ink is sprayed on the printing target, droplets will be scattered, and the scattered droplets will contaminate the printing object.

Further, from the review by the present inventors, it can be seen that if the line speed is small, it can be considered that the droplets hardly spread when the ink is sprayed on the printing object. On the other hand, when the line speed is large, the ink droplets are scattered widely when the ink is sprayed on the printing object, and the scattered droplets may contaminate the printing object.

For example, in a commercially available inkjet printer, the line speed is about 3 m / min. On the other hand, in this embodiment, the line speed is a value of 30 m / min or less, and in the range in which the mark 12 can be printed on the optical film F10X, the upper limit is a value of 50 m / min or less, so the ink is large. When sprayed on the printing object, the droplets will spread widely, and the scattered droplets will pollute the printing object.

Even if the droplets are scattered when the ink is ejected from the injection hole due to the above factors (A1), (A2), etc., or the droplets are scattered when the ink is sprayed on the print object due to the above factors (B1) to (B4), etc. In this case, according to the present embodiment, since the first droplet 4a which is capable of blocking the ink 4i scattering when ejected from the ejection hole 21 and the second droplet which is scattered when the ink 4i is sprayed on the optical film F10X are provided between the emission surface 22 and the optical film F10X. The scattering restriction member 50 of at least one of 4b, and the scattering restriction member 50 is formed with a shielding surface 50f that expands in a direction orthogonal to the normal of the emission surface 22, and is directly from the droplet ejection device 20 without the scattering restriction member 50 provided. Compared with the case where the ink 4i is ejected, 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, so it can be effectively 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 further improved.

[Third Embodiment]

The configuration of a marking device according to a third embodiment of the present invention will be described below. Fig. 15 is a perspective view showing a marking device 304 according to a third embodiment. FIG. 16 is an enlarged view of the main part of FIG. 15 and is a schematic diagram for explaining the function of the suction device 60 in the third embodiment. Note that only the second suction mechanism 62 (lower suction mechanism) is appropriately shown in FIG. 15, and the first suction mechanism 61 and the second suction mechanism 62 are shown in FIG. 16. In Fig. 15, the optical film F10X is appropriately shown by a two-dot chain line. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

In the first embodiment, as shown in FIG. 6, an example in which the marking device 4 includes the droplet ejection device 20, the shielding plate 30, and the fixing member 40 has been cited. In contrast, in the present embodiment, as shown in FIG. 15, the marking device 304 further includes a suction device 60.

As shown in FIG. 16, the suction device 60 is provided between the emission surface 22 and the optical film F10X. The drawing device 60 attracts at least one of the first droplets 4a scattered when the ink 4i is ejected from the injection hole 21 and the second droplets 4b scattered when the ink 4i is sprayed 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 disposed only below the emission 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 suctioning 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. Although the suction hole 62h extending along the width direction (y direction) of the suction surface 62f is shown in FIG. 15 as an example, the arrangement of the suction hole 62h is not limited to this and can be appropriately set as needed, for example The suction holes 62h and the like are divided in the width direction (y direction) of the suction surface 62f such that a plurality of suction holes are arranged in a row along 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 is because the distance J1 between the attraction surface and the optical film is set too small, and there is a possibility that the attraction surface 62f is in contact with the optical film F10X. In this embodiment, the distance J1 between the attraction surface and the optical film is set to about 10 mm. The distance J1 between the suction surface and the optical film is a length of a line 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 is because the distance J2 between the suction surface and the fixed member is set too small, and there is a possibility that the suction surface 62f contacts the fixed member 40. 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 a length of a line connecting the upper end of the suction surface 62f and the lower end of the fixed member 40 in a 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 the length of a line segment connecting the center of the suction hole 62h of the suction surface 62f and the center of the injection hole 21 of 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 thickness of the left and right side walls of the two suction mechanisms 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. In addition, the width of the suction hole 62h is set to the length of the short side direction (tilt direction of the suction surface 62f) of the suction hole 62h.

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 set to a value in a range of 4 m / sec or more and 20 m / sec or less in a range in which the ink 4i (not droplets but main droplets) is not shifted.

The size of the suction hole 62h is made changeable. For example, by providing a closing mechanism such as a shutter that can move along the long side direction of the suction hole 62h on the suction surface 62f, the size of the suction hole 62h can also be changed.

The second suction mechanism 62 is formed in a shape extending obliquely forward and upward so that the suction surface 62f faces the emission path Ia. Specifically, the second suction mechanism 62 includes a suction surface 62f formed as a rectangle having long sides 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 upper bases. It is formed in a trapezoid shape which extends forward and upward. A support shaft 65 protruding 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.

The left and right sides of the second suction mechanism 62 are provided with support mechanisms 73 capable of supporting the second suction mechanism 62 to be rotatable. A stage 72 extending in the film width direction (y direction) is provided below the second suction mechanism 62. 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. The 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. The support shaft 65 protrudes from the upright piece 73c to the left and right sides in a state where the long hole 73h is inserted. 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, threads 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 to the threads of the support shaft 65.

It is to be noted that reference numeral 71 in the figure indicates a support table that supports the liquid 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, at least at least the first droplets 4a and the second droplets 4b scattered when the ink 4i is scattered when the ink 4i is ejected from the exit hole 21 are attracted between the emission surface 22 and the optical film F10X. Compared with the case where the ink 4i is directly ejected from the droplet ejection device 20 without the suction device 60, the one suction device 60 can attract the first droplets 4a and the second droplets scattered between the ejection surface 22 and the optical film F10X. 4b, 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 is sprayed on the optical film F10X, the first droplet 4a and the second droplet 4b are still prevented from adhering to the optical film F10X The area other than the defect site can improve the yield of the product.

Furthermore, since the second suction mechanism 62 is disposed only vertically below the ejection path Ia from which the ink 4i is ejected, it can be reduced by comparison with the case where the suction mechanism is disposed on both sides with the ejection path Ia interposed therebetween. The number of parts is reduced by a simple structure, and the first droplets 4a and the second droplets 4b which are scattered toward the lower side than the injection path Ia due to the influence of gravity can be selectively attracted. 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, more droplets are scattered downward, so only the effect of the second suction mechanism 62 (only the suction The effect of the mechanism being arranged below the injection path Ia is greater.

In the embodiment described above, the second suction mechanism 62 has been described as an example in which the second suction mechanism 62 is disposed only vertically below the ejection path Ia from which the ink 4i is ejected, but it is not limited thereto. 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 higher than 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 also be disposed in the vertical direction to be ejected more than the injection path Ia. Path Ia is further down. 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 upward above the emission path Ia, and the second suction mechanism 61 attracts the first droplets 4a and the second droplet 4b scattered below the emission path Ia. The droplets attracted by the first suction mechanism 61 are transferred to the direction of the arrow Q1 through the piping, and the droplets attracted by the second suction mechanism 62 are transferred to the direction of the arrow Q2 through the piping. Shown inside the slot.

[Fourth Embodiment]

The configuration of a marking device according to a fourth embodiment of the present invention will be described below. FIG. 17 is a schematic view showing a marking device 404 according to the fourth embodiment, and is a schematic view 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 symbols, and detailed descriptions thereof are omitted.

As shown in FIG. 6, 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, and a fixing member 40. As shown in FIG. 11, a second variation of the first embodiment In the example, an example in which the shielding plate 130 and the emitting surface 22 are separated from each other in a configuration in which the fixing member 140 and the shielding plate 130 are integrated by the same member has been cited. In contrast, as shown in FIG. 17, in the present embodiment, the marking device 404 includes a droplet ejection device 20, a fixing member 440, and a suction device 460.

The fixing member 440 is integrally formed with the shielding plate 430 by the same member. The fixing member 440 is fixed to the injection head 20A together with the shielding plate 430. The fixing member 440 includes a shielding plate 430 and a side wall portion 141. For example, the fixing member 440 is formed of a metal plate such as SUS.

The shielding plate 430 is separated from the emission surface 22. Specifically, the second main surface 435 of the shielding plate 430 is disposed further forward (+ x direction) than the emission surface 22. When the shielding plate 430 is separated from the emission surface 22, the shielding plate 430 also functions as the scattering limiting member. Specifically, by separating the shielding plate 430 from the emitting surface 22, the second main surface 435 (the surface on the emitting surface 22 side) of the shielding plate 430 can restrict the first droplet 4a from moving toward the optical film F10X side, and the shielding plate The first main surface 432 (the surface on the optical film F10X side) of 430 is capable of restricting the movement of the second droplet 4b toward the exit surface 22 side.

The edge portion on the exit surface 22 side of the opening portion 431 of the shielding plate 430 is formed with a tapered portion 436 having an inclined surface 436 a which is inclined toward the normal of the exit surface 22 so as to face the exit hole 21. . The edge portion on the exit surface 22 side of the opening portion 431 of the shielding plate 430 is an interface between the inner wall surface 431 a of the opening portion 431 and the second main surface 435 of the shielding plate 430.

In this embodiment, a guide roller 7 is provided in contact with the optical film F10X. The liquid droplet ejection apparatus 20 according to the present embodiment is arranged to face the guide roller 7 through the optical film F10X 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. 9).

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 peripheral direction of the outer peripheral surface of the guide roller 7 with the center angle of the guide roller 7.

This is because 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 of scratching of the optical film F10X. When the wrapping angle θ exceeds 130 ° For example, bubbles easily enter between the surface protection film and the polarizing film.

When the tension applied to the optical film F10X is small, the envelope angle θ is preferably set to a value exceeding 90 °, and more preferably set to 95 ° or more. The smaller the tension applied to the optical film F10X, the more likely it is that chattering will occur. However, by setting the envelope angle θ to more than 95 °, even if the tension applied to the optical film F10X is small, it can be suppressed from occurring in the optical Membrane F10X chatter. On the other hand, when the tension applied to the optical film F10X is large, the envelope angle θ is preferably less than 90 °, and more preferably 85 ° or less. Accordingly, 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.

The conveyance speed of the optical film F10X is usually a value in a range of 9 m / min to 50 m / min. The tension applied to the optical film F10X is set to a value in a range of 400 N to 1500 N in a drying furnace, and a value in a range of 200 N to 500 N in a 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 is because when the outer diameter of the guide roller 7 is increased, the area where the optical film F10X of the enclosing angle θ contacts the outer peripheral surface of the guide roller 7 becomes larger, and the chattering occurring in the optical film F10X can be suppressed, but excessively. When the outer diameter of the guide roller 7 is increased, the optical film F10X is prone to the above-mentioned abrasion and the entry of air bubbles.

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 is because the smaller the roundness of the guide roller 7, the more the vibration of the optical film F10X in contact with the guide roller 7 can be suppressed.

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 is because when the surface roughness (maximum roughness Ry) of the outer peripheral surface of the guide roller 7 is excessively large, the optical film F10X is prone to the above-mentioned scratches and the intrusion of air bubbles.

Further, from the viewpoint of more effectively suppressing chattering that occurs 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. The optical film F10X may have a wrapping angle with respect to the additional 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 a front downward direction and a rear upward direction. Thereby, workability | operativity can be improved from a viewpoint of membrane passability, a connection part, a head cleaning, etc.

Specifically, the viewpoint of film transmissibility refers to when the optical film F10X is to be transported (at the time of passing) from a state in which the optical film F10X has not been transported on the transport line 9 (a state in which it has not yet passed), by widening the marking device 404 and The distance of the guide rollers 7 improves workability.

Next, the viewpoint of the connection portion will be described. When the raw material rolls R1 and R2 are exchanged, if the optical film F10X is connected with an adhesive tape or the like, a connection portion is generated. The thickness of the connection portion of the optical film F10X is larger than the thickness of a normal portion (thickness of the non-connection portion). Even in this case, the guide roller 7 can be moved, thereby avoiding contact between the connecting portion and the marking device 404, and the transporting line 9 can transport the optical film F10X, thereby improving workability.

In addition, the head cleaning means cleaning of the head. The guide roller 7 can be moved to widen the working space, and thus the workability can be improved.

In addition, the droplet ejection device 20 may be advanced and retracted in a direction (for example, a front-rear direction) that intersects 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 460 includes a first suction mechanism 461 disposed on one side with the opposing portion Va interposed therebetween, and a second suction mechanism 462 disposed on the other side with the opposing portion Va interposed therebetween. That is, the suction mechanisms 461 and 462 are arranged on both sides with the opposing portion Va therebetween. Specifically, the first suction mechanism 461 is disposed above the opposed portion Va in the vertical direction, and the second suction mechanism 462 is disposed below the opposed portion Va in the vertical direction.

The first suction mechanism 461 is formed with a suction surface 461f which is inclined downward and forward so as to face the facing portion Va. The second suction mechanism 462 is formed with a suction surface 462f which is inclined downward and rearward so as to face the facing portion Va. Each of the suction surfaces 461f and 462f is formed with a suction hole (not shown) for suctioning the first droplet 4a and the second droplet 4b. The suction mechanisms 461 and 462 are arranged such that the suction surfaces 461f and 462f enter the gap between the first main surface 432 of the shielding plate 430 and the optical film F10X that is in contact with the guide roller 7.

According to this embodiment, the tapered portion 436 having the inclined surface 436a 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 portion 431 of the shielding plate 430. The inclined surface 436a can be used to receive the first droplet 4a, so the first droplet 4a can be prevented from being split. If the tapered portion is not formed at the edge portion on the exit surface 22 side of the opening portion 431 of the shielding plate 430, the cross-section of the inner wall surface 431a of the opening portion 431 and the second main surface 435 of the shielding plate 430 forms a cross-section of 90. Around the corner, 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, the suction device 460 includes the first suction mechanism 461 disposed on one side via the opposing portion Va and the second suction mechanism 462 disposed on the other side via the opposing portion Va. Therefore, it is effective with a simple configuration. The ground attracts the first droplets 4a and the second droplets 4b scattered on both sides across the opposing portion Va.

In addition, the first suction mechanism 461 is disposed above the opposing portion Va in the vertical direction, and the second suction mechanism 462 is disposed below the opposing portion Va in the vertical direction. Therefore, a simple structure can be used to effectively attract The first droplet 4a and the second droplet 4b are scattered toward the upper and lower sides across the opposing portion Va.

In addition, since the suction mechanisms 461 and 462 are arranged so that the suction surfaces 461f and 462f enter the gap between the first main surface 432 of the shielding plate 430 and the optical film F10X in contact with the guide roller 7, the suction holes can be made close to the emission path. Ia, which can effectively attract the first droplets 4a and the second droplets 4b scattered between the emission surface 22 and the optical film F10X. Furthermore, by bringing the suction hole close to the ejection position of the ink 4i, the second droplet 4b can be more effectively sucked.

In addition, since the droplet ejection device 20 is arranged to face the guide roller 7 in contact with the optical film F10X via the optical film F10X while the optical film F10X is being conveyed, it is possible to suppress chattering that occurs in the optical film F10X. The droplet ejection device 20 and the fixing member 440 are arranged in this state, and the distance between the shielding plate 430 and the emitting surface 22 of the fixing member 440 can be minimized to the extent that the shielding plate 430 does not contact the optical film F10X. The diffusion range of the droplets 4a is minimized.

In addition, the distance between the suction surfaces of the suction mechanisms 461 and 462 and the facing portion Va can be minimized to the extent that the suction mechanisms 461 and 462 do not suck the optical film F10X, so that the droplets 4a and 4b can be absorbed to the maximum.

In addition, even in the case where the fixing member 440 (shielding plate 430) is not provided, it is possible to reduce the exit hole 21 and the optics of the exit head 20A as much as possible within a range where the exit surface 22 does not contact the optical film F10X. The interval of the film F10X minimizes the diffusion range of the droplets 4a.

The defect inspection system 410 of this embodiment further includes a guide roller 7 in contact with the optical film F10X, and the marking device 404 is arranged to face the guide roller 7 through the optical film F10X and contact the guide roller 7 from the optical film F10X. The ink 4i is ejected on the opposite side of the position.

According to this embodiment, since the above-mentioned guide roller 7 is further provided, the droplet ejection device 20 and the fixing member 440 can be arranged in a state in which chattering that has occurred in the optical film F10X is suppressed, and the shielding plate 430 can be kept away from the optical film. Within the range where F10X is in contact, the distance between the shielding plate 430 of the fixing member 440 and the emission surface 22 is reduced as much as possible, and the diffusion range of the droplets 4a is minimized.

In addition, although the shielding plate 430 is formed into a flat plate shape in this embodiment, that is, the example in which the first main surface 432 of the shielding plate 430 is a surface parallel to the yz plane, it is not limited thereto. For example, the portion of the shielding plate 430 facing the guide roller 7 may be recessed toward the opposite side of the guide roller 7 to form an arc-shaped surface in cross-section, that is, the first main portion of the shielding plate The surface is formed into an arc-shaped surface so as to follow the outer peripheral surface of the guide roller 7. Thereby, compared with the case where the shielding plate 430 is formed in a flat plate shape, the distance between the shielding plate and the optical film F10X can be further reduced, so 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 embodiments, and various changes can be added without departing from the spirit of the present invention.

In the above embodiment, the marking device has been described as an example in which the optical film F10X conveyed by the conveyance line 9 in a direction parallel to the vertical direction emits the ink 4i from a horizontal direction orthogonal to the vertical direction, but it is not limited thereto. For example, the marking device may eject the ink 4i with respect to 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 from the top to the optical film F10X conveyed in the horizontal direction, the ink 4i can be prevented from dripping naturally from the injection hole 21 due to the influence of gravity.

In the above embodiment, the marking device has been described as an example in which the scattering restricting plate or the suction mechanism is arranged on both sides of the ejection path Ia through which the ink 4i is ejected, but the invention is not limited to this. For example, when the flow direction of the wind caused by the conveyance of the optical film F10X and the direction of the ejection path Ia of the ink 4i are concentrated on one side of the ejection path Ia, the scattering restriction may be placed only on that side. Board or attraction.

Moreover, in the above-mentioned embodiment, although the liquid droplet ejection apparatus shown in FIG. 7 and the like has been listed, an ejection head having a plurality of ejection holes is arranged to cover the printing range, and a plurality of ejection heads are arranged along the width direction of the optical film F10X. An example of the configuration will be described, but it is not limited to this. For example, the droplet ejection device may also have a separate ejection head. The ejection head has one to three ejection holes. According to the defect position information from the control device, the droplet ejection device is arranged along the width direction and transport direction of the optical film F10X. Move to print the ink 4i by ejecting the ink 4i to the defect position on the optical film F10X. Furthermore, the scattering restricting plate and the suction mechanism can be moved to the defect position together with the droplet ejection device to prevent the droplets of the ink 4i from contaminating the optical film.

Moreover, 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 above-mentioned defect inspection system 10, but may wind the optical film F10X winding section 8 produced in the film manufacturing apparatus 1 around the core material to become the raw material roll R2 of the optical film F10X, and then send it. Go to the next step, and a part of the equipment of the next step is provided with the above-mentioned defect inspection system 10.

Furthermore, the film to which the present invention is applied is not necessarily limited to the optical films such as the above-mentioned polarizing film, retardation film, and brightness enhancement film, and the present invention can be widely applied to films that can be printed by a marking device.

Although the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is of course not limited to these examples. Various shapes, combinations, and the like of the constituent members shown in the above-mentioned examples 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 (15)

    A marking device capable of marking information by ejecting liquid droplets onto an optical film, the marking device comprising: a liquid droplet ejecting device having an ejection surface formed with an ejection hole from which the optical film ejects the droplet; and a mask The member is provided on the ejection surface and can block the droplets scattered when the droplet is ejected from the ejection hole; the shielding member is formed with an opening portion which is opened at a position opposite to the ejection hole and has The inner wall surface of the droplet that is scattered in a direction intersecting the normal line of the exit surface is blocked.         The marking device according to item 1 of the patent application range, wherein the shielding member is provided with a shielding plate having a thickness in a direction parallel to a normal line of the emission surface.         The marking device as described in the second item of the patent application scope further includes a fixing member capable of fixing the shielding plate to the droplet ejection device.         The marking device according to item 3 of the scope of patent application, wherein the fixed member is provided with a first wall portion covering both the liquid droplet ejection device and the shielding plate in a position normal to a normal line of the ejection surface. A side end portion in the direction of intersection; and a second wall portion, which is an outer edge portion of the outer periphery of the opening portion that covers the surface of the shielding plate opposite to the exit surface.         The marking device according to item 3 of the scope of patent application, wherein the fixing member is provided with a side wall portion, which is integrally formed with the shielding plate, and covers the liquid droplet ejection device in a manner similar to the ejection surface. Side end in a direction orthogonal to the line.         The marking device according to any one of claims 3 to 5 in the scope of the patent application, wherein the pre-droplet ejection device includes a plurality of ejection heads capable of ejecting the droplets; and the shielding plate is based on the plurality of ejection heads. Each of the plurality of fixing members is provided, and the plurality of fixing members are provided in order to fix the shielding plate according to each of the plurality of ejection heads.         The marking device according to any one of claims 2 to 6 in the scope of patent application, wherein the shielding plate is in contact with the emitting surface.         The marking device according to any one of claims 2 to 6, wherein the shielding plate is separated from the emitting surface.         The marking device according to any one of claims 1 to 8, wherein a diameter of the opening is larger than a diameter of the injection hole.         The marking device according to claim 1, wherein the shielding member includes a cylindrical member extending in a direction parallel to a normal line of the emission surface.         The marking device according to item 10 of the patent application scope, wherein an inner diameter of the cylindrical member is larger than a diameter of the injection hole.         The marking device according to any one of claims 1 to 11, wherein a tapered portion is formed at an edge portion of the opening portion on the side of the exit surface, and the tapered portion has a surface facing the aforementioned portion. The mode of the injection hole is an inclined surface that is inclined with respect to the normal of the injection surface.         The marking device according to any one of claims 1 to 12, in which the droplet ejection device is arranged to transport the optical film in the form of a long strip with the optical film interposed therebetween. The droplet is ejected from the opposite side of the position where the optical film is in contact with the guide roller with respect to the guide roller in contact with the optical film.         A defect inspection system includes: a conveying line for conveying a long strip-shaped film; a defect inspection device for inspecting the defects of the film conveyed on the aforementioned conveying line; and items 1 to 13 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 14 of the scope of patent application.