WO2010044463A1 - Method for cutting sheet laminate and cutting device thereof, optical sheet laminate, and backlight unit using it - Google Patents

Method for cutting sheet laminate and cutting device thereof, optical sheet laminate, and backlight unit using it Download PDF

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Publication number
WO2010044463A1
WO2010044463A1 PCT/JP2009/067914 JP2009067914W WO2010044463A1 WO 2010044463 A1 WO2010044463 A1 WO 2010044463A1 JP 2009067914 W JP2009067914 W JP 2009067914W WO 2010044463 A1 WO2010044463 A1 WO 2010044463A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sheet laminate
laminate
optical sheet
punched
Prior art date
Application number
PCT/JP2009/067914
Other languages
French (fr)
Japanese (ja)
Inventor
孝光 田寺
Original Assignee
シャープ株式会社
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Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2010044463A1 publication Critical patent/WO2010044463A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1827—Means for removing cut-out material or waste by tearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type

Definitions

  • the present invention relates to a cutting method for cutting out a sheet laminated body having a predetermined shape from a long laminated sheet obtained by laminating a plurality of long sheets, and a cutting device for cutting out the sheet laminated body.
  • a sheet laminate cutting method suitable for cutting out an optical sheet laminate having a predetermined shape to be incorporated in a backlight unit such as a liquid crystal display device from a long laminate sheet obtained by laminating a plurality of long optical sheets, and the method
  • the present invention relates to a cutting device, an optical sheet laminate, and a backlight unit using the optical sheet laminate.
  • Liquid crystal displays are used in mobile phones, notebook computers, LCD monitors, liquid crystal televisions, and the like.
  • a transmissive LCD requires a backlight, and a plurality of optical sheets for adjusting the backlight light are incorporated in the backlight unit in order to improve display performance.
  • Various types of sheets such as prismatic structured sheets and diffusion sheets are used as optical sheets to improve output luminance, illumination uniformity, and viewing angle.
  • FIG. 7 is a perspective view showing a conventional liquid crystal display device 100.
  • the liquid crystal display device 100 is provided with a backlight unit 150 on the back side of a transmissive liquid crystal panel 151.
  • the backlight unit 150 includes a light source 152, a light guide plate 153, a reflection plate 154, and the optical sheet laminate 110.
  • the light source 152 is realized by, for example, a light emitting diode (LED).
  • the backlight unit 150 illustrated in FIG. 7 is an edge light type illumination device, and includes a light source 152 provided on one side surface of the light guide plate 153 and a reflector 154 provided on one main surface portion of the light guide plate 153.
  • the optical sheet laminate 110 is provided on the other main surface portion of 153.
  • the optical sheet laminate 110 is configured by laminating a plurality of optical sheets 111a to 111d.
  • the optical sheets 111a and 111d are diffusion sheets
  • the optical sheets 111b and 111c are prism sheets.
  • the illumination light emitted from the light source 152 enters the light guide plate 153 from one side surface, exits from the other main surface of the light guide plate 153, passes through the optical sheet laminate 110, and the liquid crystal panel 151. Is irradiated.
  • the optical sheet laminate 110 diffuses and condenses illumination light emitted from the other main surface of the light guide plate 153 so that it can be illuminated uniformly over the entire liquid crystal panel 151. It is configured to demonstrate performance.
  • the sheet laminate 110 is configured by laminating a plurality of individual optical sheets one by one between the light guide plate 153 and the liquid crystal panel 151, but there are some in the handling and assembly of the plurality of individual sheets. Problem arises. That is, the individual optical sheet is easily damaged and has a protective cover, and it is necessary to remove it during assembly, which takes time. In addition, the sheet may be damaged when the protective cover is removed. Furthermore, since multiple individual sheets are stacked one by one, it takes time, and the throughput decreases and yield decreases, such as increasing the chance of dust entering between sheets and damaging the sheets. Cause it. Furthermore, with the recent increase in size and heightening of liquid crystal display devices, there is a demand for reduction of dust and foreign substances adhering to various optical sheets.
  • an optical sheet laminate for example, Patent Documents 1 and 2 in which a part of each optical sheet is bonded with zero gap has been proposed. Since these optical sheets are bonded to each other, an adsorption transfer device or the like is used for handling the optical sheet laminate when assembled into the backlight unit.
  • the optical sheet laminate is cut out from a long laminate sheet obtained by laminating a plurality of long optical sheets as an optical sheet laminate having a predetermined shape incorporated in the backlight unit.
  • the posture of the punched optical sheet laminate is disturbed.
  • each laminated sheet After punching out an optical sheet laminate of a predetermined shape for a long laminate sheet, when taking out the optical sheet laminate from the long laminate sheet and applying it to a knife edge, each laminated sheet The difference between the inner and outer circumferences occurs between the layers (interlayers), and the posture of the optical sheet laminate is disturbed.
  • the optical sheet laminate as it is cannot be incorporated into the backlight unit.
  • the remaining long sheet portion after punching out the optical sheet laminated body of a predetermined shape from the long laminated sheet is hereinafter referred to as “punched residue” for convenience of explanation.
  • the present invention has been made in view of the above problems, and an object of the present invention is to form a sheet laminate when a sheet laminate having a predetermined shape is cut out from a long laminate sheet obtained by laminating a plurality of long sheets. It is to provide a sheet laminate cutting method that can stably cut out a sheet laminate without disturbing the posture of the body and a cutting device for cutting out the sheet laminate.
  • a sheet laminate cutting method for cutting out a sheet laminate of the predetermined shape from a long laminate sheet from which a sheet laminate of a predetermined shape is punched, wherein the sheet laminate of the predetermined shape is punched The laminated sheet is supported from below while being pressed from above, and is bent in a first direction that is horizontal or slightly below the traveling direction of the long laminated sheet to obtain a distance corresponding to one sheet laminated body.
  • a sheet laminate can be stably cut out from a long laminate sheet in which a sheet laminate having a predetermined shape is punched without disturbing the posture of the sheet laminate.
  • automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
  • a sheet laminate cutting device for cutting out a sheet laminate of the predetermined shape from a long laminate sheet from which the sheet laminate of a predetermined shape is punched, wherein the sheet laminate of the predetermined shape is punched
  • a pressing unit that holds the laminated sheet from above, a supporting unit that supports the laminated sheet from below, and a movable unit that is movable, and changes the traveling direction of the punched residue after the sheet laminated body having the predetermined shape is cut out from the long laminated sheet.
  • a folding means for changing the travel direction of the punched debris to a first direction and a first position for further changing the travel direction of the punched debris. It is characterized by taking the position of 2.
  • a sheet laminate cutting device capable of stably cutting a sheet laminate from a long laminate sheet in which a sheet laminate having a predetermined shape is punched without disturbing the posture of the sheet laminate. It can.
  • automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
  • the sheet laminate cut out of the sheet laminate having the predetermined shape is cut out from the long laminate sheet in which the sheet laminate having the predetermined shape is punched.
  • the method is a method in which a long laminated sheet in which the sheet laminated body of the predetermined shape is punched is supported from below while being pressed from above, and is horizontal or slightly below the traveling direction of the long sheet. A first step of bending in the first direction and moving the distance of one sheet laminate, and after stopping the movement of the sheet laminate, the long laminate sheet is further lowered from the first direction. And a second step of bending in the second direction.
  • a sheet laminate cutting device that cuts out the sheet laminate having the predetermined shape from the long laminate sheet in which the sheet laminate having the predetermined shape is punched.
  • the sheet laminate of the predetermined shape is punched from the long laminated sheet, the pressing means for suppressing the long laminated sheet from above, the supporting means for supporting from below, and movable, the predetermined shape from the long laminated sheet.
  • a folding means for changing the traveling direction of the punched residue after the sheet laminated body is cut out, and the folding means is a first for changing the traveling direction of the punched residue into the first direction. And a second position for further changing the traveling direction of the punched residue.
  • the sheet laminate when a sheet laminate having a predetermined shape is cut out from a long laminate sheet in which a plurality of long sheets are laminated, the sheet laminate can be stably cut out without disturbing the posture of the sheet laminate.
  • a cutting method and a cutting device for cutting out the sheet laminate can be provided.
  • automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
  • FIG. 3 is a configuration diagram of an optical sheet laminate cutout portion in the first embodiment.
  • FIG. 6 is an operation explanatory diagram of the optical sheet laminate cut-out section in the first embodiment.
  • FIG. 6 is a configuration diagram of an optical sheet laminate cutout portion in a second embodiment.
  • FIG. 10 is an operation explanatory diagram of the optical sheet laminate cut-out portion in the second embodiment. It is a block diagram of a liquid crystal module.
  • FIG. 1 is a side view of a backlight unit manufacturing apparatus 10 using the optical sheet laminate according to the present invention, and is a diagram for explaining a process for manufacturing the optical sheet laminate according to the present invention.
  • FIG. 2 is a diagram illustrating a state in the middle of manufacturing the optical sheet laminate.
  • the manufacturing process of the backlight unit according to the present invention proceeds in the direction of arrow A (from left to right) in FIG.
  • the optical sheet laminate shown in this example is an example constituted by four optical sheets.
  • the number of optical sheets to be stacked is not particularly limited, and when adding or reducing optical sheets, the slit rolls of the optical sheets to be stacked may be increased or decreased.
  • 11a, 11b, 11c, and 11d are slit rolls, and long optical sheet materials 12a, 12b, 12c, and 12d are respectively wound in a roll shape.
  • the optical sheet material 12a is, for example, an upper diffusion sheet
  • the optical sheet material 12b is an upper prism sheet
  • the optical sheet material 12c is a lower prism sheet
  • the optical sheet material 12d is a lower diffusion sheet.
  • the same number of slit rolls as the optical sheets used for the optical sheet laminate to be manufactured are prepared.
  • the slit roll 11c is set
  • the slit rolls 11a to 11d of each optical sheet are individually identified and described, the slit roll 11a of the first layer sheet, the slit roll 11b of the second layer sheet, and the slit roll of the third layer sheet 11c and the slit roll 11d of the fourth layer sheet, respectively, and when describing any unspecified, the suffixes a to d are omitted and the slit roll 11 of the optical sheet is referred to.
  • the blade contact sheet 13a is a blade contact sheet, which is prepared in a state of being wound around a sheet roll 13b.
  • the blade contact sheet 13a is a sheet for protecting a blade for punching when an optical sheet laminate having a predetermined shape is cut out from a long laminated sheet obtained by laminating a plurality of long optical sheet materials.
  • the blade contact sheet 13a is laminated with the optical sheet materials 12a, 12b, 12c, and 12d, and is conveyed to a punching unit 17 and a cutting unit 19 described later.
  • the cleaning means 14a to 14e are cleaning means.
  • the optical sheet materials 12a to 12d drawn from the slit rolls 11a to 11d and the blade contact sheet 13a drawn from the sheet roll 13b pass through the cleaning means 14a to 14e, respectively, and the front and back surfaces are cleaned.
  • known means can be used, for example, an air blow, an adhesive roller or the like.
  • an adhesive roller having adhesiveness is used as the cleaning means, the optical sheet materials 12a to 12d and the blade contact sheet 13a are sandwiched by the adhesive roller so as to adhere to the front and back surfaces of the optical sheet materials 12a to 12d and the blade contact sheet 13a. Garbage can be removed.
  • the optical sheet may have a protective sheet for protecting the surface before use.
  • the protective sheet is peeled off before each optical sheet material 12a-12d passes through the first cleaning means 14a-14d.
  • a known means can be used, for example, by winding with a separate roll.
  • the ultrasonic welders 15 and 16 are a first ultrasonic welder and a second ultrasonic welder, respectively, for joining a plurality of optical sheet materials supplied from a slit roll.
  • the ultrasonic welders 15 and 16 have ultrasonic horns attached to their tips.
  • the ultrasonic horn is driven on the laminated optical sheet material while being driven with ultrasonic waves for driving. What is necessary is just to press. Thereby, a plurality of optical sheet materials can be ultrasonically bonded.
  • two ultrasonic welders 15 and 16 are used, but this is not an essential requirement. Further, the ultrasonic welder may be provided only at one place, not at two places.
  • the ultrasonic vibration intensity of the ultrasonic welders 15 and 16 may be set within a range in which the welded portion is not completely melted.
  • Reference numeral 17 denotes punching means, which is a cutting machine that punches an optical sheet laminate having a predetermined shape from a long laminate sheet obtained by laminating a plurality of optical sheets.
  • punching means 17 a punching machine using a servo press is generally used.
  • the punching of the optical sheet laminate is stopped at a position where the punching die such as a Thomson die or Pinnacle die is brought close to the cutting table on which the long laminated sheet is placed, and the cutting edge of the punching die bites into the blade contact sheet 13a. Is made by At this time, since the blade contact sheet 13a is used, the cutting edge of the punching die does not hit the cutting table. Thus, the life of the punching die can be extended by interposing the blade contact sheet 13a.
  • FIGS. 2A and 2B are views showing a state of the long laminated sheet in a state where the optical sheet laminate 21 is punched out by the punching means 17.
  • FIG. 2A is a top view of the long laminated sheet in a state of being punched by the punching means 17, and
  • FIG. 2B is along the line segments B and B ′ of FIG. FIG.
  • reference numeral 21 denotes an optical sheet laminate that has been punched into a predetermined shape by the punching means 17.
  • No. 35 shows the entire long laminated sheet in a state where the optical sheet laminate 21 has been punched by the punching means 17 but the optical sheet laminate 21 has not yet been separated.
  • it is comprised from the optical sheet material 12a, 12b, 12c, 12d of 4 layers, and the blade contact sheet
  • Reference numeral 36 denotes a punched residue, which is a member that is discarded after the optical sheet laminate 21 is separated.
  • the optical sheet laminate 21 is transported in the direction of arrow A while remaining in the punched waste 36 to be discarded later on the blade contact sheet 13a.
  • the long laminated sheet 35 in the state in which the optical sheet laminate 21 is punched out by the punching means 17 has a role as a carrier that conveys the optical sheet laminate 21.
  • it is referred to as a conveyance body 35.
  • Reference numeral 5 denotes a welding point formed outside the punched optical sheet laminate 21 and formed by the ultrasonic welders 15 and 16. As shown in FIG. 2B, the welding point 5 has reached the blade contact sheet 13a. Moreover, it can be seen from the description of FIG. 2 that there is no welding point anywhere in the main body portion of the optical sheet laminate 21.
  • reference numeral 19 denotes a cut-out portion, and as shown in FIG. 2, has a “optical sheet laminate 21 in a state where it stays on the blade contact sheet 13 a and remains in the punched residue 36 to be discarded later”. This is a portion where the “optical sheet laminate 21” is taken out from the conveyance body 35 in the middle of manufacture. The details of the cutout portion 19 will be described later with reference to FIG.
  • the backlight unit manufacturing apparatus 10 includes an assembly part 38 for incorporating the optical sheet laminate 21 into the subassembly 25, a moving mechanism 23 for moving the optical sheet laminate 21 to the assembly part 38, It has a transport conveyor 30, a sub-assembly 26 in which the optical sheet laminate 21 is incorporated, a light-shielding double-sided adhesive sheet affixing portion 39 for affixing the light-shielding double-sided adhesive sheet 29, and the like.
  • the sub-assembly 25 includes a frame, a light guide plate, and a reflection sheet. The light guide plate is fitted in the center of the frame-shaped frame, and a reflection sheet is provided on the side of the light guide plate that faces the assembly side of the optical sheet laminate. It is a thing. In addition to this, an LED may be incorporated.
  • the blade contact sheet 13a is drawn from the sheet roll 13b via the cleaning means 14e, and is laminated with the optical sheet material 12d drawn from the slit roll 11d and the optical sheet material 12c drawn from the slit roll 11c in the middle. .
  • the blade contact sheet 13a, the optical sheet material 12d, and the optical sheet material 12c are appropriately joined by the first ultrasonic welder 15. As already described with reference to FIG. 2, the joining position is set outside the region where the optical sheet laminate 21 is cut out.
  • the conveyance direction of the optical sheet material 12c from the slit roll 11c is orthogonal to the conveyance direction of the optical sheet material 12d and the blade contact sheet 13a from the slit roll 11d.
  • the optical sheet material 12c pulled out from the sheet roll 11c and passed through the cleaning means 14c (not shown) is cut in the width direction by a cutting blade (not shown) every predetermined length.
  • the cut and fragmented optical sheet material 12c is mounted on the optical sheet material 12d drawn from the slit roll 11d.
  • the optical sheet material 12 d and the optical sheet material 12 c are welded at the welding point 36 by the first ultrasonic welder 15.
  • the cut piece of the optical sheet material 12c from the slit roll 11c is welded and fixed onto the optical sheet material 12d from the slit roll 11d.
  • the joining by the ultrasonic welder at this portion is not essential.
  • an optical sheet material 12b drawn from the slit roll 11b and an optical sheet material 12a drawn from the slit roll 11a are further laminated on the laminated sheet made of the blade contact sheet 13a, the optical sheet material 12d, and the optical sheet material 12c. Then, they are joined by the second ultrasonic welder 16, and the optical sheet materials 12a, 12b, 12c and 12d are fixed. As already described, the joining by the ultrasonic welder at this portion is not essential.
  • the optical sheet material 12d and the blade contact sheet 13a are also fixed by bonding.
  • the strength of the punched residue other than the blade pad is extremely reduced because the portion of the optical sheet laminate 21 is separated. For this reason, when the tension of the punched residue is increased, it is deformed and the laminated state of the optical sheet laminate 21 is affected. In order to avoid this, the space between the optical sheet material 12d and the blade contact sheet 13a is fixed.
  • the long laminated sheet in which all of the necessary optical sheets are laminated is supplied to the punching unit 17, where an optical sheet laminate 21 having a predetermined shape is punched as shown in FIG.
  • the optical sheet laminate 21 punched into a predetermined shape by the punching means 17 remains on the blade pad sheet 13a in the punched waste 36 that will be discarded later. It is conveyed to the cutout part 19 which is a process.
  • the optical sheet laminate 21 is separated without inconvenience to the shape and the like by a process described in detail later.
  • the separated optical sheet laminate 21 is moved to the built-in portion 38 by the gripping hand 22 and the moving mechanism 23 and is incorporated in the sub-assembly 25 on the transport conveyor 30.
  • the light-shielding double-sided pressure-sensitive adhesive sheet adhering portion 39 attaches the light-shielding double-sided adhesive sheet to the sub-assembly 26 in which the optical sheet laminate 21 is incorporated, and finally the backlight unit 28 is completed. .
  • the punched residue 36 after the optical sheet laminate 21 is separated is wound and collected together with the blade contact sheet 13a on the punched residue roll 20.
  • FIG. 1 is a side view
  • the optical sheet material 12a which is an upper prism sheet
  • the optical sheet material 12c which is a lower prism sheet
  • the optical sheet material 12c which is the lower prism sheet
  • the optical sheet material 12c flows from the slit roll 11c toward the rear side of the sheet at the slit roll 11c in FIG. 1, and the optical sheet material 12c, which is the lower prism sheet, is cut here.
  • the optical sheet material 12a which is the upper prism sheet, is overlapped at right angles.
  • the optical sheet laminate 21 includes, for example, an upper diffusion sheet 12a, an upper prism sheet 12b, a lower prism sheet 12c, and a lower diffusion sheet 12d from the light exit surface side.
  • the diffusion sheet is a sheet in which beads are fixed to the surface of the base sheet with a binder, and has a predetermined light diffusion performance.
  • the upper diffusion sheet 12a and the lower diffusion sheet 12d have different bead diameters (average particle diameters) and light diffusion performance. The diameter of beads, the amount used, etc. are used in the same manner as before.
  • the prism sheet is a lens sheet in which prisms, which are convex lenses formed in one axial direction on one surface of a base sheet, are adjacently arranged on the entire surface, and those conventionally used in this field can be mentioned.
  • the prism has a pitch of 24 ⁇ m, a concavo-convex height of 12 ⁇ m, and a convex vertex angle of 90 degrees.
  • the entire surface includes substantially the entire surface.
  • the slit roll 11 for supplying the optical sheet materials 12a to 12d and the sheet roll 13b for supplying the blade contact sheet 13a have a back tension adjusting mechanism (not shown) for applying tension to the optical sheet materials 12a to 12d and the blade contact sheet 13a. Furthermore, the optical sheet materials 12a to 12d and the blade contact sheet 13a are sandwiched by a pair of conveying rollers (not shown). Then, by rotating the pair of conveying rollers, the optical sheet materials 12a to 12d and the blade contact sheet 13a are pulled out from the slit roll 11 blade contact sheet roll 13b, and the optical sheet materials 12a to 12d and the blade contact sheet 13a are moved in the longitudinal direction. Transport.
  • the cutting unit 19 includes a support roller 50, a folding roller 51, and a pressing roller 52.
  • the supporting roller 50, the folding roller 51, and the pressing roller 52 are configured to be rotatable.
  • the rotating shaft of the folding roller 51 can swing around the rotating shaft of the support roller 50, whereby the folding roller 51 takes a first position D and a second position E.
  • an angle ⁇ formed by a straight line passing through a point in contact with the support roller 50 and horizontal in the transport direction A of the transport body 35 and a straight line in contact with both the support roller 50 and the return roller 51 is the position of the return roller 51. Accordingly, an acute angle ⁇ 1 and an acute angle ⁇ 2 are taken.
  • 35 is a transport body for transporting the optical sheet laminated body 21 together with the dregs 36 as already described with reference to FIG. 2. That is, the optical sheet laminate 21 is moved in the direction of arrow C by the transport body 35 while remaining in the punched waste 36 that will be discarded later on the blade contact sheet 13a.
  • the conveyance body 35 passes between the support roller 50 and the pressing roller 52 and is wound around the folding roller 51 and moves in the direction of arrow A, thereby conveying the optical sheet laminate 21 in the direction of conveyance arrow A.
  • 53 is a roller for changing the direction of the conveyance body 35, and is suitably provided as needed.
  • the angle ⁇ is set to ⁇ 1, and the conveyance body 35 is passed between the support roller 50 and the pressing roller 52 and wound around the folding roller 51.
  • the pressing roller 52 presses the central portion in the transport width direction from above the transport body 35, operates as a pressing unit, and is rotated by friction with the uppermost surface of the transport body 35.
  • the transport body 35 in a state where the optical sheet laminated body 21 remains in the extracted residue 36 (hereinafter, the transport body 35 in a state where the optical sheet laminated body 21 remains in the removed residue 36 is referred to as a “pre-cutting transport body 35”. “)” Is sent for one pitch (one piece) of the punched optical sheet laminate 21.
  • the optical sheet laminated body 21 is sandwiched between the support roller 50 and the pressing roller 52, and when the pre-cutting transport body 35 passes over the support roller 50, the punched waste 36 and the blade contact sheet 13a have an angle ⁇ 1.
  • the optical sheet laminate 21 is punched from the punched-out portion. Therefore, no downward force is applied to the optical sheet laminate 21, and the punched-out piece 36 and the blade pad are applied. It will be separated from the sheet 13a.
  • FIG. 3 schematically shows the state at that time.
  • the angle ⁇ is shifted to the second position ⁇ 2, as indicated by a broken line in FIG.
  • the upstream end portion of the optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52. Therefore, the optical sheet laminate 21 maintains the state shown in FIG. With the movement of the folding roller 51, the sheet 13a and the punched waste 36 are further lowered downward, and the optical sheet laminate 21 is completely separated from the punched waste 36. At this time, although the distortion generated in the punched residue 36 is large, it is already separated from the optical sheet laminate 21, and the posture of the optical sheet laminate 21 is not disturbed.
  • the gripping hand 22 (see FIG. 1, receiving the sheet laminate)
  • the optical sheet laminate 21 is held by the means.
  • the cutting unit 19 moves to the upstream side in the transport direction. As a result, the support of the optical sheet laminate 21 is transferred from the cutout portion 19 to the gripping hand, and the delivery is completed.
  • the angle ⁇ 1 is preferably 0 ° (that is, horizontal) to 30 °, and ⁇ 2 is preferably at least twice as large as ⁇ 1.
  • ⁇ 1 is preferably a slight angle, preferably 30 ° or less. If the angle ⁇ 1 is angled, the pre-cutting conveyance body 35 passes over the support roller 50, and the cut portion of the optical sheet laminate 21 is a portion where the punched portion 36 is slightly lowered downward at two points in the width direction. Then, it is separated from the waste residue 36. Further, as ⁇ 1 is smaller, the inner / outer circumference difference is not generated in the punched residue 36, and the influence on the cutting out of the optical sheet laminate 21 is reduced.
  • the angle ⁇ 2 is set so that a gripping hand for delivering the optical sheet laminate 21 can secure a sufficient space to securely grip the optical sheet laminate 21, and the blade contact sheet 13a or It is set so that the removal residue 36 can be released. Further, by adjusting the positional relationship between the pressing roller 52 and the support roller 50, the holding state of the upstream end portion of the optical sheet laminate 21 is changed, and the posture of the cut out optical sheet laminate 21 is adjusted. Is possible.
  • the optical sheet laminate 21 punched into a desired shape by the punching unit 17 is not cut out in a state where the periphery is surrounded by the punching scraps 36 on the blade pad sheet 13 a. Although it is transported by the transport body 35, the punching means 17 and the punching waste 36 are not shown in FIG. 4 for easy understanding of the operation.
  • the optical sheet laminate 21 punched into a desired shape is clearly shown so that its position can be understood.
  • the conveyance of the pre-cut conveyance body 35 is performed by the sheet conveyance mechanism 40.
  • the sheet conveying mechanism 40 mainly includes a fixed-side sheet gripping portion 55 and a moving-side sheet gripping portion 56.
  • the sheet gripping portion 55 on the fixed side of the sheet transport mechanism 40 grips the widthwise end of the pre-cutting transport body 35 and fixes and supports the pre-cutting transport body 35 for a predetermined period. Further, the sheet gripping portion 56 on the moving side of the sheet transport mechanism 40 moves by a predetermined distance while gripping the width direction end portion of the pre-cutting transport body 35.
  • the moving-side sheet gripping portion 56 moves to the upstream side of the conveyance without gripping the pre-cutting conveyance body 35, and is cut out upon completion of the movement.
  • the front conveyance body 35 is gripped.
  • the fixed-side sheet gripping part 55 opens the pre-cutting conveyance body 35.
  • the moving-side sheet gripping portion 56 moves to a predetermined position.
  • the pre-cutting conveyance body 35 By moving while holding the pre-cutting conveyance body 35, the pre-cutting conveyance body 35 is moved and conveyed by the distance moved by the sheet gripping portion 56 on the moving side. After the fixed-side sheet gripping portion 55 grips the pre-cutting conveyance body 35 again, and the moving-side sheet gripping portion 56 opens the pre-cutting conveyance body 35, the moving-side sheet gripping portion 56 again returns to the predetermined upstream side of the conveyance. Move to the position. This is repeated and the sheet is intermittently conveyed.
  • the fixed-side sheet gripping portion 55 of the sheet transport mechanism 40 opens the pre-cutting transport body 35, and the moving-side sheet gripping portion 56 grips the pre-cutting transport body 35 and moves a predetermined distance.
  • the state before the cutting is shown, and the pre-cutting conveyance body 35 is conveyed in the direction of arrow A.
  • the folding roller 51 is in the first position.
  • the optical sheet laminate 21 passes between the support roller 50 and the pressing roller 52.
  • the pressing roller 52 presses the optical sheet laminate 21 from above with a predetermined force.
  • the pressing roller 52 rotates due to friction with the surface layer of the optical sheet laminate 21.
  • the pressing roller 52 has a small specific gravity, rotates with a weak torque, and is adjusted so that the surface layer of the optical sheet laminate 21 does not shift from the lower layer.
  • the optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52, while the punching waste 36 and the blade contact sheet 13a are wound around the folding roller 51, and the idler 53, the idler 54, and the like are passed through FIG.
  • the paper is conveyed to a punching roller 20 (not shown).
  • the optical sheet laminate 21, the punched piece 36, and the blade contact sheet 13a are separated because they have different traveling directions.
  • the optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52 and travels substantially straight.
  • the extraction residue 36 and the blade contact sheet 13 a are conveyed toward the folding roller 51 and separated from the optical sheet laminate 21 on the support roller 50.
  • the optical sheet laminate 21 and the punched residue 36 are separated at two points in the width direction on the support roller 50.
  • the winding of the punched debris 36 around the support roller 50 is slight, and the distortion generated in the punched debris 36 is small. Therefore, the punched debris 36 does not affect the posture of the optical sheet laminate 21.
  • the folding roller 51 moves to the second position with the sheet conveyance stopped, as shown in FIG. 4B.
  • the optical sheet laminate 21 and the cut residue 36 are completely separated, and the optical sheet laminate 21 is cut out.
  • the punching roller 36 is moved to the retracted position when the folding roller 51 is moved to the second position, the optical sheet laminate 21 can be gripped by the gripping hand 22.
  • the cutout portion 19 including the support roller 50, the folding roller 51, the pressing roller 52, and the like moves in the upstream direction of sheet conveyance.
  • the fixed-side sheet gripping portion 55 grips the pre-cutting conveying body 35 the cutting portion 19 is moved in the upstream direction of sheet conveyance, so that the excess punched waste is sent in the downstream direction.
  • the support of the sheet laminate 21 is moved from the cutout portion 19 to the gripping hand 22, and the cutout of the sheet laminate 21 and the delivery with the gripping hand 22 is completed. Further, since the sheet laminated body is cut out when the sheet cut-out portion 10 is retracted, the tab portion of the sheet laminated body 21 is not caught by the scrap and the posture of the sheet laminated body 21 is not disturbed. The same effect can be obtained also when the substantially rectangular sheet laminate 21 has an angle with respect to the conveyance direction of the conveyance body 35.
  • the cutting unit 19 including the support roller 50, the folding roller 51, and the pressing roller 52 is returned to the original position while feeding the pre-cutting conveyance body 35, and the state shown in FIG.
  • the optical sheet laminate 21 can be stably and continuously cut from the pre-cutting conveyance body 35. Since these operations require almost no manual operation and the entire process can be automated, there is no problem of contamination due to manual intervention.
  • the support roller 50, the folding roller 51, and the pressing roller 52 are integrally moved in the direction opposite to the cutting direction of the sheet laminate 21. Thereby, delivery of the sheet
  • the pressing means is configured by a gripping chuck 60 including a gripping chuck fixing unit 61 and a gripping chuck moving unit 62, and the upstream end portion in the transporting direction of the optical sheet laminate 21 of the transporting body 35 before cutting. It is gripped together with the blade contact sheet 13a and moves in the transport direction in synchronization with the transport of the pre-cutting transport body 35.
  • the operations of the support roller 50 and the pressing roller 52 are the same as those in the above-described embodiment.
  • the upstream end of the optical sheet laminate 21 in the conveyance direction of the conveyance body 35 before cutting is grasped by the grasping chuck 60 together with the blade contact sheet 13a. Thereafter, the pre-cutting transport body 35 is transported in the direction of arrow A in the drawing. At this time, the gripping chuck 60 moves in parallel with the transport direction of the pre-cutting transport body 35 while gripping the end of the pre-cutting transport body 35 in synchronization with the transport of the pre-cutting transport body 35.
  • the pre-cutting conveying body 35 is separated on the support roller 50 into the optical sheet laminated body 21, the punching residue 36, and the blade contact sheet 13a, and is in a state shown in FIG. 6B.
  • the folding roller 51 is in the first position.
  • the folding roller 51 moves to the second position. Thereby, the optical sheet laminated body 21 and the punched residue 36 are completely separated. Further, since the punching roller 36 is moved to the retracted position by the folding roller 51 moving to the second position, the optical sheet laminate 21 can be gripped by the gripping hand 22.
  • the gripping chuck 60 is opened, and as shown in FIG. 6E, the gripping chuck 60, the support roller 50, The cutting unit 19 including the folding roller 51 moves in the upstream direction of sheet conveyance. Thereby, the cutting out of the optical sheet laminate 21 and the delivery with the gripping hand 22 are completed.
  • the optical sheet laminate 21 can be stably and continuously cut from the pre-cutting conveyance body 35.
  • the first direction is a range greater than 0 degree and less than or equal to 30 degrees
  • the second direction is a range of 60 degrees to 90 degrees.
  • the present invention it is possible to minimize the posture disorder to the sheet laminate itself when the sheet laminate is taken out from the long laminate sheet in which the sheet laminate having a predetermined shape is punched.
  • the sheet laminate is an optical sheet laminate.
  • the optical sheet laminate having a predetermined shape can be stably cut out without disturbing the posture.
  • At least one of the pressing means, the support means, and the folding means is configured by a rotatable roller.
  • a sheet laminate that can be stably cut out from a long laminate sheet in which a sheet laminate having a predetermined shape is punched out without disturbing the posture of the sheet laminate with an extremely simple configuration.
  • a body cutting device can be provided. Note that it is most preferable that the folding means is constituted by a roller because the winding of the sheet is large.
  • the supporting means and the pressing means are cylindrical bodies,
  • the sheet laminate is sandwiched between a roller as the pressing means and a cylindrical body as the support means.
  • the posture of the sheet laminated body at the time of cutting can be adjusted by sandwiching the sheet laminated body between the roller as the pressing means and the cylindrical body as the supporting means and adjusting the pressing angle. As a result, delivery of the sheet laminate can be ensured.
  • the pressing means is characterized by comprising a gripping chuck comprising a fixed part and a moving part.
  • the sheet laminate itself to be cut out can be securely gripped, and malfunctions during manufacturing can be reduced.
  • the sheet laminate since the cutting direction of the sheet laminate can be adjusted accurately, the sheet laminate can be reliably taken out.
  • the pressing means, the support means, and the folding means move together in the direction opposite to the cut-out direction of the sheet laminate.
  • the sheet laminate can be reliably delivered between the sheet laminate cutting device and the sheet laminate taking-out means.
  • the first position is a position that determines the traveling direction of the punched dregs in a range of 0 degrees to 30 degrees
  • the second position is a range of 60 degrees to 90 degrees in advancing direction of the punched dregs. It is characterized by the position determined in
  • the folding means is configured to be swingable between the first position and the second position around the support means.
  • optical sheet laminate according to the invention of the present application It is an optical sheet laminate manufactured by the above-described sheet laminate cutout method.
  • the backlight unit in order to solve the above-described problem, it is a backlight unit such as a liquid crystal display device using the optical sheet laminate manufactured by the above-described sheet laminate cutting method.
  • a backlight unit having excellent characteristics can be provided.
  • a laminated body in which a plurality of optical sheets used for a backlight unit of a liquid crystal display device and the like are laminated, and the optical sheet laminated body having no adhesive portion in the main body portion and having excellent characteristics. can be provided.
  • the liquid crystal display device is widely used as a display device in various devices and has high industrial applicability.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Liquid Crystal (AREA)
  • Details Of Cutting Devices (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

Provided is a production method and a production device which can cut an optical sheet laminate (21) free from interlayer bonding by means of a knife edge without disturbing the position of the optical sheet laminate (21).  After passing between a supporting roller (50) and a retaining roller (52), a carrier (35) having a punched optical sheet laminate (21) is wound around a folded roller (51) having the advancing direction thereof changed slightly and then carried.  The optical sheet laminate (21) is separated from the carrier (35) near the outlet of the supporting roller (50) having the advancing direction thereof changed slightly.  The sheet laminate is cut while a change in the advancing direction is reduced and thereby the amount of distortion, due to the difference between the inner and outer circumferences which is generated by winding around the supporting roller, is reduced, and an easy-to-take-out state is brought about by increasing the winding angle when the sheet laminate is taken out, whereby the optical sheet laminate (21) can be cut stably without disturbing the position of the sheet laminate.

Description

シート積層体切出方法及びその切出装置、光学シート積層体、それを用いたバックライトユニットSheet laminated body cutting method and cutting apparatus therefor, optical sheet laminated body, and backlight unit using the same
　本発明は、複数の長尺シートを積層した長尺積層シートから、所定形状のシート積層体を切り出す切出方法及びそのシート積層体を切り出すための切出装置に係るものである。特に、複数枚の長尺の光学シートを積層した長尺積層シートから、液晶表示装置等のバックライトユニットに組み込む所定形状の光学シート積層体を切り出すのに好適なシート積層体切出方法およびその切出装置、光学シート積層体、該光学シート積層体を用いたバックライトユニットに関する。 The present invention relates to a cutting method for cutting out a sheet laminated body having a predetermined shape from a long laminated sheet obtained by laminating a plurality of long sheets, and a cutting device for cutting out the sheet laminated body. In particular, a sheet laminate cutting method suitable for cutting out an optical sheet laminate having a predetermined shape to be incorporated in a backlight unit such as a liquid crystal display device from a long laminate sheet obtained by laminating a plurality of long optical sheets, and the method The present invention relates to a cutting device, an optical sheet laminate, and a backlight unit using the optical sheet laminate.
　液晶ディスプレイ（ＬＣＤ）は、携帯電話、ノート型コンピュータ、ＬＣＤモニタおよび液晶テレビなどにおいて利用されている。透過型のＬＣＤにはバックライトが必要であり、表示性能を向上させるためにバックライトユニットにはバックライト光を調節する複数枚の光学シートが組み込まれている。光学シートにはプリズム状構造化シート、拡散シートを始めとする様々なタイプのシートが、出力輝度、照明均一性、視野角改善のために用いられている。 Liquid crystal displays (LCDs) are used in mobile phones, notebook computers, LCD monitors, liquid crystal televisions, and the like. A transmissive LCD requires a backlight, and a plurality of optical sheets for adjusting the backlight light are incorporated in the backlight unit in order to improve display performance. Various types of sheets such as prismatic structured sheets and diffusion sheets are used as optical sheets to improve output luminance, illumination uniformity, and viewing angle.
　図７は、従来の技術の液晶表示装置１００を示す斜視図である。液晶表示装置１００には透過型の液晶パネル１５１の背面側にバックライトユニット１５０が設けられている。 FIG. 7 is a perspective view showing a conventional liquid crystal display device 100. The liquid crystal display device 100 is provided with a backlight unit 150 on the back side of a transmissive liquid crystal panel 151.
　バックライトユニット１５０は、光源１５２と、導光板１５３と、反射板１５４と、光学シート積層体１１０とを備える。光源１５２は、例えば、発光ダイオード（ＬＥＤ）によって実現される。図７に示すバックライトユニット１５０は、エッジライト方式の照明装置であり、導光板１５３の一側面部に光源１５２が設けられ、導光板１５３の一方主面部に反射板１５４が設けられ、導光板１５３の他方主面部に光学シート積層体１１０が設けられて構成されている。光学シート積層体１１０は、複数の光学シート１１１ａ～１１１ｄが積層されて構成される。例えば、光学シート１１１ａと１１１ｄは拡散シート、光学シート１１１ｂと１１１ｃはプリズムシートである。 The backlight unit 150 includes a light source 152, a light guide plate 153, a reflection plate 154, and the optical sheet laminate 110. The light source 152 is realized by, for example, a light emitting diode (LED). The backlight unit 150 illustrated in FIG. 7 is an edge light type illumination device, and includes a light source 152 provided on one side surface of the light guide plate 153 and a reflector 154 provided on one main surface portion of the light guide plate 153. The optical sheet laminate 110 is provided on the other main surface portion of 153. The optical sheet laminate 110 is configured by laminating a plurality of optical sheets 111a to 111d. For example, the optical sheets 111a and 111d are diffusion sheets, and the optical sheets 111b and 111c are prism sheets.
　この光学シート積層体１１０では、光源１５２から出射される照明光が、一側面から導光板１５３に入射され、導光板１５３の他方主面から出射されて、光学シート積層体１１０を経て液晶パネル１５１に照射される。光学シート積層体１１０は、導光板１５３の他方主面から出射される照明光を、拡散、集光させ、液晶パネル１５１の全体にわたって、均一に照明することができるようにするなど、所望の光学性能を発揮するように構成されている。 In this optical sheet laminate 110, the illumination light emitted from the light source 152 enters the light guide plate 153 from one side surface, exits from the other main surface of the light guide plate 153, passes through the optical sheet laminate 110, and the liquid crystal panel 151. Is irradiated. The optical sheet laminate 110 diffuses and condenses illumination light emitted from the other main surface of the light guide plate 153 so that it can be illuminated uniformly over the entire liquid crystal panel 151. It is configured to demonstrate performance.
　シート積層体１１０は、導光板１５３と液晶パネル１５１との間に複数枚の個別の光学シートが１枚ずつ積層されて構成されているが、複数枚の個別シートの取り扱いおよび組み立において、幾つかの問題が生じる。即ち、個別の光学シートは傷がつきやすく保護カバーが貼られており、組立時にはそれを除去する必要があり、時間がかかる。また、保護カバー除去時にシートに損傷を与える可能性がある。更には、複数枚の個別のシートを１枚毎に積層していくため、時間がかかると共に、シート間にゴミが入ったり、シートを損傷させる機会が増える等、スループットを低下させ、歩留まりを低下させる原因となる。更には、近年の液晶表示装置の大型化、高微細化に伴い、各種の光学シートに付着しているゴミ、異物などの低減が求められている。 The sheet laminate 110 is configured by laminating a plurality of individual optical sheets one by one between the light guide plate 153 and the liquid crystal panel 151, but there are some in the handling and assembly of the plurality of individual sheets. Problem arises. That is, the individual optical sheet is easily damaged and has a protective cover, and it is necessary to remove it during assembly, which takes time. In addition, the sheet may be damaged when the protective cover is removed. Furthermore, since multiple individual sheets are stacked one by one, it takes time, and the throughput decreases and yield decreases, such as increasing the chance of dust entering between sheets and damaging the sheets. Cause it. Furthermore, with the recent increase in size and heightening of liquid crystal display devices, there is a demand for reduction of dust and foreign substances adhering to various optical sheets.
　これを解決する方法として、各光学シートの一部をゼロギャップ接合した光学シート積層体（例えば、特許文献１、２）が提案されている。これらは、光学シート間が接合されているためバックライトユニットへの組込時等の光学シート積層体のハンドリングは吸着移載装置等を用いている。 As a method for solving this problem, an optical sheet laminate (for example, Patent Documents 1 and 2) in which a part of each optical sheet is bonded with zero gap has been proposed. Since these optical sheets are bonded to each other, an adsorption transfer device or the like is used for handling the optical sheet laminate when assembled into the backlight unit.
日本国公表特許公報「特表２００６－５１３４５２号公報（２００６年４月２０日公表）」Japanese Patent Gazette “Special Table 2006-513352 Gazette (April 20, 2006)” 日本国公開特許公報「特開２００７－１５５９４１号公報（２００７年６月２１日公開）」Japanese Patent Publication “JP 2007-155941 A” (published on June 21, 2007)
　しかしながら、上記特許文献１、２に示された従来の方法では、光学シート積層体の一部に接合部を設ける必要があり、接合部が光学的特性に悪影響を与えないよう接合部は表示領域から離す必要がある。従って、光学シート積層体のサイズが大きくなってしまうという課題がある。 However, in the conventional methods disclosed in Patent Documents 1 and 2, it is necessary to provide a joint portion in a part of the optical sheet laminate, and the joint portion is a display region so that the joint portion does not adversely affect the optical characteristics. Need to be separated from. Therefore, there exists a subject that the size of an optical sheet laminated body will become large.
　また、複数の光学シートの層間を接合しない場合、光学シートを積層した長尺積層シートから所定形状の光学シート積層体を切り出す際に、製造上の課題がある。 Further, when the layers of a plurality of optical sheets are not joined, there is a manufacturing problem when an optical sheet laminated body having a predetermined shape is cut out from a long laminated sheet obtained by laminating optical sheets.
　即ち、通常、光学シート積層体は、複数の長尺の光学シートを積層した長尺積層シートから、バックライトユニットに組み込む所定形状の光学シート積層体として切り出されることになる。この場合、長尺積層シートから所定形状の光学シート積層体を打ち抜いた後に、所定形状の光学シート積層体を取り出そうとすると、打ち抜いた光学シート積層体の姿勢を乱してしまうという課題を有している。例えば、長尺積層シートに対して、所定形状の光学シート積層体を打ち抜いた後、当該長尺積層シートから光学シート積層体のみを取り出すために、ナイフエッジにかけると、積層された各シートの間（層間）で、内外周差が発生して光学シート積層体の姿勢を乱してしまう。従って、このままの光学シート積層体はバックライトユニットに組み込むことができない。なお、長尺積層シートから所定形状の光学シート積層体を打ち抜いた後の残りの長尺シート部分を、説明の都合上の、以後、「抜きカス」という。 That is, normally, the optical sheet laminate is cut out from a long laminate sheet obtained by laminating a plurality of long optical sheets as an optical sheet laminate having a predetermined shape incorporated in the backlight unit. In this case, after punching out the optical sheet laminate having a predetermined shape from the long laminate sheet, if the optical sheet laminate having the predetermined shape is taken out, the posture of the punched optical sheet laminate is disturbed. ing. For example, after punching out an optical sheet laminate of a predetermined shape for a long laminate sheet, when taking out the optical sheet laminate from the long laminate sheet and applying it to a knife edge, each laminated sheet The difference between the inner and outer circumferences occurs between the layers (interlayers), and the posture of the optical sheet laminate is disturbed. Therefore, the optical sheet laminate as it is cannot be incorporated into the backlight unit. The remaining long sheet portion after punching out the optical sheet laminated body of a predetermined shape from the long laminated sheet is hereinafter referred to as “punched residue” for convenience of explanation.
　つまり、光学シート積層体が打ち抜かれてはいるが、未だ「抜きカス」部分と分離されていない状態の長尺積層シートを、ナイフエッジに巻き付けるとシートの内外周で巻き長さに差が発生するため、各層毎にその内外周差分のずれが搬送方向に発生し、上層の抜きカスが下層の打ち抜いた製品側に乗り上げる状態が発生する。それを回避するため、抜きカス側の材料間を接合した場合も、同様にナイフエッジに巻きつけると内外周差が発生する。その場合は、搬送方向にシートはずれないが、溶着部がナイフエッジを乗り越える直前にナイフエッジへの巻き付け上流側に内周ほどのシートに余りが発生し、打ち抜いた製品の姿勢が乱れる。 In other words, if a long laminated sheet that has been punched out but is not yet separated from the “punched” part is wrapped around the knife edge, there will be a difference in the winding length at the inner and outer circumferences of the sheet. For this reason, the difference between the inner and outer circumferences of each layer occurs in the conveying direction, and a state occurs in which the upper layer punched portion runs over the punched product side of the lower layer. In order to avoid this, even when the material on the punched-out residue side is joined, if it is wound around the knife edge in the same manner, an inner and outer circumference difference occurs. In that case, the sheet does not slip in the conveying direction, but immediately before the welded portion passes over the knife edge, a surplus is generated on the upstream side of the winding around the knife edge, and the posture of the punched product is disturbed.
　本発明は、上記問題点に鑑みて成されたものであり、本発明の目的は、複数の長尺シートを積層した長尺積層シートから、所定形状のシート積層体を切り出す際に、シート積層体の姿勢を乱さず安定してシート積層体を切り出すことができるシート積層体切出方法及びそのシート積層体を切り出すための切出装置を提供することである。 The present invention has been made in view of the above problems, and an object of the present invention is to form a sheet laminate when a sheet laminate having a predetermined shape is cut out from a long laminate sheet obtained by laminating a plurality of long sheets. It is to provide a sheet laminate cutting method that can stably cut out a sheet laminate without disturbing the posture of the body and a cutting device for cutting out the sheet laminate.
　上述の課題を解決するために、本願の発明に係るシート積層体切出方法では、
　所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出方法であって、上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から押さえながら下方から支持すると共に、上記長尺積層シートの進行方向に対して水平または僅かに下方である第１の方向へ折り曲げて上記シート積層体の１個分の距離を移動させる第１の工程と、上記シート積層体の移動を停止後、上記長尺積層シートを上記第１の方向より更に下方である第２の方向に折り曲げる第２の工程とを有することを特徴としている。 In order to solve the above problems, in the sheet laminate cutting method according to the invention of the present application,
A sheet laminate cutting method for cutting out a sheet laminate of the predetermined shape from a long laminate sheet from which a sheet laminate of a predetermined shape is punched, wherein the sheet laminate of the predetermined shape is punched The laminated sheet is supported from below while being pressed from above, and is bent in a first direction that is horizontal or slightly below the traveling direction of the long laminated sheet to obtain a distance corresponding to one sheet laminated body. A first step of moving, and a second step of bending the long laminated sheet in a second direction that is further below the first direction after stopping the movement of the sheet laminated body. It is said.
　この発明によれば、所定形状のシート積層体が打ち抜かれている長尺積層シートから、シート積層体の姿勢を乱さず安定してシート積層体を切り出すことができる。また、ほとんど人手のかからない自動化を実現できるため、人の作業に伴うゴミ混入等の課題を解決できる。 According to this invention, a sheet laminate can be stably cut out from a long laminate sheet in which a sheet laminate having a predetermined shape is punched without disturbing the posture of the sheet laminate. In addition, since automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出装置であって、上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から抑える押圧手段と、下方から支持する支持手段と、移動可能で、上記長尺積層シートから上記所定形状のシート積層体が切り出された後の抜きカスの進行方向を変更するための折返し手段とを有し、上記折返し手段は、上記抜きカスの進行方向を第１の方向に変更するための第１の位置と、上記抜きカスの進行方向を更に大きく変更するための第２の位置をとることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
A sheet laminate cutting device for cutting out a sheet laminate of the predetermined shape from a long laminate sheet from which the sheet laminate of a predetermined shape is punched, wherein the sheet laminate of the predetermined shape is punched A pressing unit that holds the laminated sheet from above, a supporting unit that supports the laminated sheet from below, and a movable unit that is movable, and changes the traveling direction of the punched residue after the sheet laminated body having the predetermined shape is cut out from the long laminated sheet. A folding means for changing the travel direction of the punched debris to a first direction and a first position for further changing the travel direction of the punched debris. It is characterized by taking the position of 2.
　この発明によれば、所定形状のシート積層体が打ち抜かれている長尺積層シートから、シート積層体の姿勢を乱さず安定してシート積層体を切り出すことができるシート積層体切出装置を提供できる。また、ほとんど人手のかからない自動化を実現できるため、人の作業に伴うゴミ混入等の課題を解決できる。 According to the present invention, there is provided a sheet laminate cutting device capable of stably cutting a sheet laminate from a long laminate sheet in which a sheet laminate having a predetermined shape is punched without disturbing the posture of the sheet laminate. it can. In addition, since automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
　本発明の他の目的、特徴、および優れた点は、以下に示す記載によって十分分かるであろう。また、本発明の利点は、添付図面を参照した次の説明で明白になるであろう。 Other objects, features, and superior points of the present invention will be fully understood from the following description. The advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.
　以上述べたとおり、本願の発明に係るシート積層体切出方法においては、所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出方法であって、上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から押さえながら下方から支持すると共に、上記長尺シートの進行方向に対して水平または僅かに下方である第１の方向へ折り曲げて上記シート積層体の１個分の距離を移動させる第１の工程と、上記シート積層体の移動を停止後、上記長尺積層シートを上記第１の方向より更に下方である第２の方向に折り曲げる第２の工程と、を有することを特徴としている。 As described above, in the sheet laminate cutting method according to the invention of the present application, the sheet laminate cut out of the sheet laminate having the predetermined shape is cut out from the long laminate sheet in which the sheet laminate having the predetermined shape is punched. The method is a method in which a long laminated sheet in which the sheet laminated body of the predetermined shape is punched is supported from below while being pressed from above, and is horizontal or slightly below the traveling direction of the long sheet. A first step of bending in the first direction and moving the distance of one sheet laminate, and after stopping the movement of the sheet laminate, the long laminate sheet is further lowered from the first direction. And a second step of bending in the second direction.
　また、本願の別の発明に係るシート積層体切出装置においては、所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出装置であって、上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から抑える押圧手段と、下方から支持する支持手段と、移動可能で、上記長尺積層シートから上記所定形状のシート積層体が切り出された後の抜きカスの進行方向を変更するための折返し手段とを有し、上記折返し手段は、上記抜きカスの進行方向を第１の方向に変更するための第１の位置と、上記抜きカスの進行方向を更に大きく変更するための第２の位置をとることを特徴としている。 In the sheet laminate cutting device according to another invention of the present application, a sheet laminate cutting device that cuts out the sheet laminate having the predetermined shape from the long laminate sheet in which the sheet laminate having the predetermined shape is punched. The sheet laminate of the predetermined shape is punched from the long laminated sheet, the pressing means for suppressing the long laminated sheet from above, the supporting means for supporting from below, and movable, the predetermined shape from the long laminated sheet. And a folding means for changing the traveling direction of the punched residue after the sheet laminated body is cut out, and the folding means is a first for changing the traveling direction of the punched residue into the first direction. And a second position for further changing the traveling direction of the punched residue.
　これにより、複数の長尺シートを積層した長尺積層シートから、所定形状のシート積層体を切り出す際に、シート積層体の姿勢を乱さず安定してシート積層体を切り出すことができるシート積層体切出方法及びそのシート積層体を切り出すための切出装置を提供することができる。また、ほとんど人手のかからない自動化を実現できるため、人の作業に伴うゴミ混入等の課題を解決できる。 Thereby, when a sheet laminate having a predetermined shape is cut out from a long laminate sheet in which a plurality of long sheets are laminated, the sheet laminate can be stably cut out without disturbing the posture of the sheet laminate. A cutting method and a cutting device for cutting out the sheet laminate can be provided. In addition, since automation can be realized with almost no human intervention, it is possible to solve problems such as dust contamination associated with human work.
本発明に係るバックライトユニットの製造ラインの構成図である。It is a block diagram of the manufacturing line of the backlight unit which concerns on this invention. 光学シート積層体が打ち抜かれた状態の長尺積層シートの状態を示す図である。It is a figure which shows the state of the elongate laminated sheet of the state by which the optical sheet laminated body was pierce | punched. 実施の形態１における光学シート積層体切出し部の構成図である。FIG. 3 is a configuration diagram of an optical sheet laminate cutout portion in the first embodiment. 実施の形態１における光学シート積層体切出し部の動作説明図である。FIG. 6 is an operation explanatory diagram of the optical sheet laminate cut-out section in the first embodiment. 実施の形態２における光学シート積層体切出し部の構成図である。FIG. 6 is a configuration diagram of an optical sheet laminate cutout portion in a second embodiment. 実施の形態２における光学シート積層体切出し部の動作説明図である。FIG. 10 is an operation explanatory diagram of the optical sheet laminate cut-out portion in the second embodiment. 液晶モジュールの構成図である。It is a block diagram of a liquid crystal module.
　〔実施の形態１〕
　本発明の実施の形態１を、図１から図３を用いて説明する。なお、以下の説明では、本発明を実施するために技術的に好ましい種々の限定が付されているが、本発明の技術的範囲は以下の実施の形態及び図面に限定されるものではない。 [Embodiment 1]
A first embodiment of the present invention will be described with reference to FIGS. In the following description, various technically preferable limitations for implementing the present invention are given, but the technical scope of the present invention is not limited to the following embodiments and drawings.
　はじめに、図１、図２を用いて、本発明に係る光学シート積層体を用いたバックライトユニット製造装置１０を説明する。図１は、本発明に係る光学シート積層体を用いたバックライトユニット製造装置１０の側面図であると共に、本発明に係る光学シート積層体を製造する工程を説明する図でもある。図２は、光学シート積層体を製造する途中の状態を示す図である。 First, a backlight unit manufacturing apparatus 10 using the optical sheet laminate according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view of a backlight unit manufacturing apparatus 10 using the optical sheet laminate according to the present invention, and is a diagram for explaining a process for manufacturing the optical sheet laminate according to the present invention. FIG. 2 is a diagram illustrating a state in the middle of manufacturing the optical sheet laminate.
　本発明に係るバックライトユニットの製造工程は、図１中矢印Ａ方向（左から右）に進む。この実施例で示す光学シート積層体は、４枚の光学シートによって構成される例である。積層する光学シートの枚数には特に限定はなく、光学シートを追加したり、減らしたりする場合は、重ね合わせる光学シートのスリットロールを増減させればよい。 The manufacturing process of the backlight unit according to the present invention proceeds in the direction of arrow A (from left to right) in FIG. The optical sheet laminate shown in this example is an example constituted by four optical sheets. The number of optical sheets to be stacked is not particularly limited, and when adding or reducing optical sheets, the slit rolls of the optical sheets to be stacked may be increased or decreased.
　図１において、１１ａ、１１ｂ、１１ｃ、１１ｄは、スリットロールであり、夫々長尺の光学シート材料１２ａ、１２ｂ、１２ｃ、１２ｄがロール状に巻回されている。光学シート材料１２ａは、例えば、上拡散シート、光学シート材料１２ｂは上プリズムシート、光学シート材料１２ｃは下プリズムシート、光学シート材料１２ｄは下拡散シートである。以上の説明から明らかなように、製造すべき光学シート積層体に用いる光学シートと同数のスリットロールが準備されている。なお、スリットロール１１ｃは、図１の紙面に対して、垂直方向に置かれており、光学シート材料１２ｃは、図１中では、既に切断された形で示されている。 In FIG. 1, 11a, 11b, 11c, and 11d are slit rolls, and long optical sheet materials 12a, 12b, 12c, and 12d are respectively wound in a roll shape. The optical sheet material 12a is, for example, an upper diffusion sheet, the optical sheet material 12b is an upper prism sheet, the optical sheet material 12c is a lower prism sheet, and the optical sheet material 12d is a lower diffusion sheet. As is clear from the above description, the same number of slit rolls as the optical sheets used for the optical sheet laminate to be manufactured are prepared. In addition, the slit roll 11c is set | placed in the orthogonal | vertical direction with respect to the paper surface of FIG. 1, and the optical sheet material 12c is shown in the already cut | disconnected form in FIG.
　なお、以下、各光学シートのスリットロール１１ａ～１１ｄを、個別に識別して説明するときは、第１層シートのスリットロール１１ａ、第２層シートのスリットロール１１ｂ、第３層シートのスリットロール１１ｃ、第４層シートのスリットロール１１ｄとそれぞれいい、不特定のいずれかについて説明するときは、添え字ａ～ｄを省略して光学シートのスリットロール１１という。 Hereinafter, when the slit rolls 11a to 11d of each optical sheet are individually identified and described, the slit roll 11a of the first layer sheet, the slit roll 11b of the second layer sheet, and the slit roll of the third layer sheet 11c and the slit roll 11d of the fourth layer sheet, respectively, and when describing any unspecified, the suffixes a to d are omitted and the slit roll 11 of the optical sheet is referred to.
　１３ａは、刃当てシートであり、シートロール１３ｂにロール状に巻回された状態で準備される。刃当てシート１３ａは、複数枚の長尺の光学シート材料を積層した長尺積層シートから、所定形状の光学シート積層体を切り出す際の打ち抜き用の刃を保護するためのシートである。刃当てシート１３ａは、光学シート材料１２ａ、１２ｂ、１２ｃ、１２ｄと積層されて、後で説明する打抜き手段１７、切出し部１９に搬送されることになる。 13a is a blade contact sheet, which is prepared in a state of being wound around a sheet roll 13b. The blade contact sheet 13a is a sheet for protecting a blade for punching when an optical sheet laminate having a predetermined shape is cut out from a long laminated sheet obtained by laminating a plurality of long optical sheet materials. The blade contact sheet 13a is laminated with the optical sheet materials 12a, 12b, 12c, and 12d, and is conveyed to a punching unit 17 and a cutting unit 19 described later.
　１４ａ～１４ｅは、クリーニング手段である。スリットロール１１ａ～１１ｄから引き出された光学シート材料１２ａ～１２ｄ、及びシートロール１３ｂから引き出された刃当てシート１３ａは、それぞれクリーニング手段１４ａ～１４ｅを通過し、その表裏面がクリーニングされる。クリーニング手段１４ａ～１４ｅには、公知の手段が使用でき、例えば、エアブロー、粘着ローラ等が用いられる。クリーニング手段として、粘着性を有する粘着ローラを用いる場合、粘着ローラで光学シート材料１２ａ～１２ｄ及び刃当てシート１３ａを挟持することで、各光学シート材料１２ａ～１２ｄおよび刃当てシート１３ａの表裏に付着しているごみを除去することができる。 14a to 14e are cleaning means. The optical sheet materials 12a to 12d drawn from the slit rolls 11a to 11d and the blade contact sheet 13a drawn from the sheet roll 13b pass through the cleaning means 14a to 14e, respectively, and the front and back surfaces are cleaned. As the cleaning means 14a to 14e, known means can be used, for example, an air blow, an adhesive roller or the like. When an adhesive roller having adhesiveness is used as the cleaning means, the optical sheet materials 12a to 12d and the blade contact sheet 13a are sandwiched by the adhesive roller so as to adhere to the front and back surfaces of the optical sheet materials 12a to 12d and the blade contact sheet 13a. Garbage can be removed.
　ここでは図示していないが、光学シート、特にプリズムシートには使用するまでの表面を保護するための保護シートが貼られている場合がある。その場合には、各光学シート材料１２ａ～１２ｄが第１のクリーニング手段１４ａ～１４ｄを通過する前に、保護シートを剥離しておく。保護シートの剥離には、公知の手段が使用でき、例えば、別のロールで巻き取ることによって行われる。 Although not shown here, the optical sheet, particularly the prism sheet, may have a protective sheet for protecting the surface before use. In that case, the protective sheet is peeled off before each optical sheet material 12a-12d passes through the first cleaning means 14a-14d. For peeling off the protective sheet, a known means can be used, for example, by winding with a separate roll.
　１５、１６は、夫々第１の超音波ウエルダ、第２の超音波ウエルダであり、スリットロールから供給される複数枚の光学シート材料を接合するためのものである。超音波ウエルダ１５，１６は、その先端に超音波ホーンが取り付けられている。超音波ウエルダによって、スリットロール１１から供給される複数枚の光学シート材料を接合するには、上記の超音波ホーンを、駆動用の超音波で駆動しながら、積層された光学シート材料の上に押圧すればよい。これにより、複数枚の光学シート材料を超音波接合することができる。なお、この実施例では、２個の超音波ウエルダ１５、１６を用いているが、これは必須の要件ではない。また、超音波ウエルダは、２箇所ではなく、１箇所のみに設けても良い。超音波ウエルダ１５，１６の超音波振動強度については、溶着部が溶け切れたりしない範囲で設定すればよい。 15 and 16 are a first ultrasonic welder and a second ultrasonic welder, respectively, for joining a plurality of optical sheet materials supplied from a slit roll. The ultrasonic welders 15 and 16 have ultrasonic horns attached to their tips. In order to join a plurality of optical sheet materials supplied from the slit roll 11 with the ultrasonic welder, the ultrasonic horn is driven on the laminated optical sheet material while being driven with ultrasonic waves for driving. What is necessary is just to press. Thereby, a plurality of optical sheet materials can be ultrasonically bonded. In this embodiment, two ultrasonic welders 15 and 16 are used, but this is not an essential requirement. Further, the ultrasonic welder may be provided only at one place, not at two places. The ultrasonic vibration intensity of the ultrasonic welders 15 and 16 may be set within a range in which the welded portion is not completely melted.
　１７は、打抜き手段であり、複数枚の光学シートを積層した長尺積層シートから、所定形状の光学シート積層体を打ち抜く切断機である。打抜き手段１７としては、一般に、サーボプレスによる打抜き機が用いられる。そして、光学シート積層体の打ち抜きは、トムソン型やピナクル型等の打抜き型を、上記長尺積層シートを乗せた切断台に近接させ、打抜き型の刃先が刃当てシート１３ａに食い込んだ位置で止めることによってなされる。
この際、刃当てシート１３ａを用いているので、打抜き型の刃先が切断台に当たることはない。このように、刃当てシート１３ａを介在させることによって、打抜き型の寿命を伸ばすことができる。 Reference numeral 17 denotes punching means, which is a cutting machine that punches an optical sheet laminate having a predetermined shape from a long laminate sheet obtained by laminating a plurality of optical sheets. As the punching means 17, a punching machine using a servo press is generally used. The punching of the optical sheet laminate is stopped at a position where the punching die such as a Thomson die or Pinnacle die is brought close to the cutting table on which the long laminated sheet is placed, and the cutting edge of the punching die bites into the blade contact sheet 13a. Is made by
At this time, since the blade contact sheet 13a is used, the cutting edge of the punching die does not hit the cutting table. Thus, the life of the punching die can be extended by interposing the blade contact sheet 13a.
　図２（ａ）、（ｂ）は、打抜き手段１７によって光学シート積層体２１が打ち抜かれた状態の長尺積層シートの状態を示す図である。図２（ａ）は、打抜き手段１７によって打ち抜かれた状態の長尺積層シートを上から見た図であり、図２（ｂ）は、図２（ａ）の線分Ｂ、Ｂ’に沿った断面図である。 FIGS. 2A and 2B are views showing a state of the long laminated sheet in a state where the optical sheet laminate 21 is punched out by the punching means 17. FIG. 2A is a top view of the long laminated sheet in a state of being punched by the punching means 17, and FIG. 2B is along the line segments B and B ′ of FIG. FIG.
　図２（ａ）において、２１は、打抜き手段１７によって所定形状に打抜かれた光学シート積層体を示している。３５は、打抜き手段１７によって光学シート積層体２１が打ち抜かれてはいるが、未だ上記光学シート積層体２１が分離されていない状態の長尺積層シート全体を示しており、この実施例では、図２（ｂ）に示すとおり、４層の光学シート材料１２ａ、１２ｂ、１２ｃ、１２ｄ及び刃当てシート１３ａから構成されている。３６は、抜きカスであり、光学シート積層体２１が分離された後では捨てられることになる部材である。 2A, reference numeral 21 denotes an optical sheet laminate that has been punched into a predetermined shape by the punching means 17. No. 35 shows the entire long laminated sheet in a state where the optical sheet laminate 21 has been punched by the punching means 17 but the optical sheet laminate 21 has not yet been separated. As shown to 2 (b), it is comprised from the optical sheet material 12a, 12b, 12c, 12d of 4 layers, and the blade contact sheet | seat 13a. Reference numeral 36 denotes a punched residue, which is a member that is discarded after the optical sheet laminate 21 is separated.
　従って、上記光学シート積層体２１は、刃当てシート１３ａ上で、後で捨てられることになる抜きカス３６内に留まった状態で矢印Ａ方向に搬送されることになる。この説明から明らかなように、「打抜き手段１７によって光学シート積層体２１が打ち抜かれた状態の長尺積層シート３５」は、光学シート積層体２１を搬送する搬送体としての役割があることから、以後、搬送体３５と称する。なお、５は、打抜かれた光学シート積層体２１の領域外に形成された溶着ポイントであり、超音波ウエルダ１５、１６により形成されたものである。図２（ｂ）に示すように、溶着ポイント５は刃当てシート１３ａにまで到達している。また、図２の記載より、光学シート積層体２１の本体部分には、何処にも溶着ポイントがないことがわかる。 Therefore, the optical sheet laminate 21 is transported in the direction of arrow A while remaining in the punched waste 36 to be discarded later on the blade contact sheet 13a. As is clear from this explanation, “the long laminated sheet 35 in the state in which the optical sheet laminate 21 is punched out by the punching means 17” has a role as a carrier that conveys the optical sheet laminate 21. Hereinafter, it is referred to as a conveyance body 35. Reference numeral 5 denotes a welding point formed outside the punched optical sheet laminate 21 and formed by the ultrasonic welders 15 and 16. As shown in FIG. 2B, the welding point 5 has reached the blade contact sheet 13a. Moreover, it can be seen from the description of FIG. 2 that there is no welding point anywhere in the main body portion of the optical sheet laminate 21.
　図１において、１９は切出し部であり、図２に示したとおり、「刃当てシート１３ａ上で、後で捨てられることになる抜きカス３６内に留まった状態の光学シート積層体２１」を有する製造途中の搬送体３５から、「光学シート積層体２１」を取り出す部分である。この切出し部１９については、図３を参照して後で詳細を説明する。 In FIG. 1, reference numeral 19 denotes a cut-out portion, and as shown in FIG. 2, has a “optical sheet laminate 21 in a state where it stays on the blade contact sheet 13 a and remains in the punched residue 36 to be discarded later”. This is a portion where the “optical sheet laminate 21” is taken out from the conveyance body 35 in the middle of manufacture. The details of the cutout portion 19 will be described later with reference to FIG.
　図１に示すとおり、バックライトユニット製造装置１０は、その他、光学シート積層体２１をサブアッシイ２５へ組み込むための組込部３８、光学シート積層体２１を組込部３８へ移動させる移動機構２３、搬送コンベア３０、光学シート積層体２１が組み込まれたサブアッシイ２６、遮光両面粘着シート２９を貼り付ける遮光両面粘着シート貼付部３９等を有しており、最終的にバックライトユニット２８を製造することになる。ここで、サブアッシイ２５はフレーム、導光板、および反射シートからなり、額縁形状のフレーム中央部に導光板がはめ込まれ、導光板の光学シート積層体の組み込み側と対向する側に反射シートが設けられたものである。これに加え、ＬＥＤが組み込まれている場合もある。 As shown in FIG. 1, the backlight unit manufacturing apparatus 10 includes an assembly part 38 for incorporating the optical sheet laminate 21 into the subassembly 25, a moving mechanism 23 for moving the optical sheet laminate 21 to the assembly part 38, It has a transport conveyor 30, a sub-assembly 26 in which the optical sheet laminate 21 is incorporated, a light-shielding double-sided adhesive sheet affixing portion 39 for affixing the light-shielding double-sided adhesive sheet 29, and the like. Become. Here, the sub-assembly 25 includes a frame, a light guide plate, and a reflection sheet. The light guide plate is fitted in the center of the frame-shaped frame, and a reflection sheet is provided on the side of the light guide plate that faces the assembly side of the optical sheet laminate. It is a thing. In addition to this, an LED may be incorporated.
　次に、図１を参照して、バックライトユニット製造装置１０の動作を簡単に説明する。刃当てシート１３ａが、クリーニング手段１４ｅを介して、シートロール１３ｂから引き出され、途中で、スリットロール１１ｄから引き出された光学シート材料１２ｄ、スリットロール１１ｃから引き出された光学シート材料１２ｃと積層される。これら刃当てシート１３ａ、光学シート材料１２ｄ、光学シート材料１２ｃは、第１の超音波ウエルダ１５により、適宜接合される。接合位置は、図２を参照して既に説明したとおり、光学シート積層体２１を切り出す領域外に設定される。 Next, the operation of the backlight unit manufacturing apparatus 10 will be briefly described with reference to FIG. The blade contact sheet 13a is drawn from the sheet roll 13b via the cleaning means 14e, and is laminated with the optical sheet material 12d drawn from the slit roll 11d and the optical sheet material 12c drawn from the slit roll 11c in the middle. . The blade contact sheet 13a, the optical sheet material 12d, and the optical sheet material 12c are appropriately joined by the first ultrasonic welder 15. As already described with reference to FIG. 2, the joining position is set outside the region where the optical sheet laminate 21 is cut out.
　スリットロール１１ｃからの光学シート材料１２ｃの搬送方向は、スリットロール１１ｄからの光学シート材料１２ｄや刃当てシート１３ａの搬送方向と直交している。シートロール１１ｃから引き出され、クリーニング手段１４ｃ（図示せず）を通過した光学シート材料１２ｃは、所定長さ毎に切断刃（図示せず）で幅方向に切断される。切断され小片化した光学シート材料１２ｃは、スリットロール１１ｄから引き出された光学シート材料１２ｄの上に搭載される。光学シート材料１２ｄ及び光学シート材料１２ｃは、第１の超音波ウエルダ１５により溶着点３６で溶着される。これによれば、スリットロール１１ｃからの光学シート材料１２ｃの切断片は、スリットロール１１ｄからの光学シート材料１２ｄの上に溶着固定されることになる。なお、既に述べたが、この部分での超音波ウエルダによる接合は必須ではない。 The conveyance direction of the optical sheet material 12c from the slit roll 11c is orthogonal to the conveyance direction of the optical sheet material 12d and the blade contact sheet 13a from the slit roll 11d. The optical sheet material 12c pulled out from the sheet roll 11c and passed through the cleaning means 14c (not shown) is cut in the width direction by a cutting blade (not shown) every predetermined length. The cut and fragmented optical sheet material 12c is mounted on the optical sheet material 12d drawn from the slit roll 11d. The optical sheet material 12 d and the optical sheet material 12 c are welded at the welding point 36 by the first ultrasonic welder 15. According to this, the cut piece of the optical sheet material 12c from the slit roll 11c is welded and fixed onto the optical sheet material 12d from the slit roll 11d. As already described, the joining by the ultrasonic welder at this portion is not essential.
　次いで、刃当てシート１３ａ、光学シート材料１２ｄ、光学シート材料１２ｃよりなる積層シートには、更に、スリットロール１１ｂから引き出された光学シート材料１２ｂ、スリットロール１１ａから引き出された光学シート材料１２ａが積層され、第２の超音波ウエルダ１６により接合され、上記の各光学シート材料１２ａ、１２ｂ、１２ｃ及び１２ｄ間が固定される。なお、既に述べたが、この部分での超音波ウエルダによる接合も必須ではない。 Next, an optical sheet material 12b drawn from the slit roll 11b and an optical sheet material 12a drawn from the slit roll 11a are further laminated on the laminated sheet made of the blade contact sheet 13a, the optical sheet material 12d, and the optical sheet material 12c. Then, they are joined by the second ultrasonic welder 16, and the optical sheet materials 12a, 12b, 12c and 12d are fixed. As already described, the joining by the ultrasonic welder at this portion is not essential.
　このとき、光学シート材料１２ｄと刃当てシート１３ａとの間も接合により固定される。光学シート積層体２１を打抜いた後、刃当て以外の抜きカスは光学シート積層体２１の部分が分離されるため、極端に強度が落ちる。そのため抜きカスのテンションを上げると変形し、光学シート積層体２１の積層状態に影響が出てしまう。それを避けるために、光学シート材料１２ｄと刃当てシート１３ａとの間を固定する。 At this time, the optical sheet material 12d and the blade contact sheet 13a are also fixed by bonding. After the optical sheet laminate 21 is punched, the strength of the punched residue other than the blade pad is extremely reduced because the portion of the optical sheet laminate 21 is separated. For this reason, when the tension of the punched residue is increased, it is deformed and the laminated state of the optical sheet laminate 21 is affected. In order to avoid this, the space between the optical sheet material 12d and the blade contact sheet 13a is fixed.
　必要な光学シートの全てが積層された長尺積層シートは、打抜き手段１７に供給され、ここで、図２に示すとおりに所定形状の光学シート積層体２１が打抜かれる。打抜き手段１７によって所定形状に打抜かれた光学シート積層体２１は、図２に示すとおり、刃当てシート１３ａの上で、後で捨てられることになる抜きカス３６内に留まった状態で、次の工程である切出し部１９に搬送される。 The long laminated sheet in which all of the necessary optical sheets are laminated is supplied to the punching unit 17, where an optical sheet laminate 21 having a predetermined shape is punched as shown in FIG. As shown in FIG. 2, the optical sheet laminate 21 punched into a predetermined shape by the punching means 17 remains on the blade pad sheet 13a in the punched waste 36 that will be discarded later. It is conveyed to the cutout part 19 which is a process.
　切出し部１９では、後で詳細に説明する工程によって、光学シート積層体２１のみを、その形状等に不都合を与えることなく分離する。分離された光学シート積層体２１は、把持ハンド２２、移動機構２３によって、組込部３８に移動されて、搬送コンベア３０上のサブアッシイ２５に組み込まれる。そして、搬送コンベア３０によって、遮光両面粘着シート貼着部３９において、光学シート積層体２１を組み込まれたサブアッシイ２６に遮光両面接着シートが貼り付けられ、最終的に、バックライトユニット２８として完成される。 In the cutout section 19, only the optical sheet laminate 21 is separated without inconvenience to the shape and the like by a process described in detail later. The separated optical sheet laminate 21 is moved to the built-in portion 38 by the gripping hand 22 and the moving mechanism 23 and is incorporated in the sub-assembly 25 on the transport conveyor 30. Then, the light-shielding double-sided pressure-sensitive adhesive sheet adhering portion 39 attaches the light-shielding double-sided adhesive sheet to the sub-assembly 26 in which the optical sheet laminate 21 is incorporated, and finally the backlight unit 28 is completed. .
　光学シート積層体２１が分離された後の抜きカス３６は、刃当てシート１３ａと共に、抜きカスロール２０に巻き取り回収される。 The punched residue 36 after the optical sheet laminate 21 is separated is wound and collected together with the blade contact sheet 13a on the punched residue roll 20.
　なお、図１は側面から見た図であるので、上プリズムシートである光学シート材料１２ａと、下プリズムシートである光学シート材料１２ｃとを、夫々のレンズの軸方向を直交させて重ね合わせる工程は示されていない。しかし、図１中スリットロール１１ｃのところで紙面手前から紙面後方に向かってスリットロール１１ｃからの下プリズムシートである光学シート材料１２ｃが流れており、ここで下プリズムシートである光学シート材料１２ｃの切断と、上プリズムシートである光学シート材料１２ａへの直交する重ね合わせが行われている。 Since FIG. 1 is a side view, the optical sheet material 12a, which is an upper prism sheet, and the optical sheet material 12c, which is a lower prism sheet, are superposed so that the axial directions of the respective lenses are orthogonal to each other. Is not shown. However, the optical sheet material 12c, which is the lower prism sheet, flows from the slit roll 11c toward the rear side of the sheet at the slit roll 11c in FIG. 1, and the optical sheet material 12c, which is the lower prism sheet, is cut here. Then, the optical sheet material 12a, which is the upper prism sheet, is overlapped at right angles.
　既に述べたとおり、光学シート積層体２１は、例えば、光の出射面側から上拡散シート１２ａ、上プリズムシート１２ｂ、下プリズムシート１２ｃ、下拡散シート１２ｄからなっている。拡散シートは、ベースシートの表面にビーズをバインダーで固定したシートであり、所定の光拡散性能を有する。通常、上拡散シート１２ａと下拡散シート１２ｄではビーズの径（平均粒径）が異なり、光拡散性能も異なる。ビーズの径、使用量などは従来と同様に使用される。 As already described, the optical sheet laminate 21 includes, for example, an upper diffusion sheet 12a, an upper prism sheet 12b, a lower prism sheet 12c, and a lower diffusion sheet 12d from the light exit surface side. The diffusion sheet is a sheet in which beads are fixed to the surface of the base sheet with a binder, and has a predetermined light diffusion performance. Usually, the upper diffusion sheet 12a and the lower diffusion sheet 12d have different bead diameters (average particle diameters) and light diffusion performance. The diameter of beads, the amount used, etc. are used in the same manner as before.
　プリズムシートは、ベースシートの片面の表面に１軸方向に形成された凸状レンズであるプリズムが隣接して全面に配列されたレンズシートで、従来当分野で使用されたものが挙げられる。例えば、プリズムはピッチ２４μｍ、凹凸高さ１２μｍ、凸部の頂角９０度である。ここで全面とは略全面をも含むものとする。 The prism sheet is a lens sheet in which prisms, which are convex lenses formed in one axial direction on one surface of a base sheet, are adjacently arranged on the entire surface, and those conventionally used in this field can be mentioned. For example, the prism has a pitch of 24 μm, a concavo-convex height of 12 μm, and a convex vertex angle of 90 degrees. Here, the entire surface includes substantially the entire surface.
　光学シート材料１２ａ～１２ｄを供給するスリットロール１１及び刃当てシート１３ａを供給するシートロール１３ｂは、光学シート材料１２ａ～１２ｄ及び刃当てシート１３ａにテンションを与えるための図示しないバックテンション調整機構を有しており、更に、光学シート材料１２ａ～１２ｄ及び刃当てシート１３ａは、図示しない搬送ローラ対により挟持されている。そして、上記搬送ローラ対を回転させることによって、光学シート材料１２ａ～１２ｄ及び刃当てシート１３ａをスリットロール１１刃当てシートロール１３ｂから引き出し、光学シート材料１２ａ～１２ｄ及び刃当てシート１３ａを長手方向に搬送する。 The slit roll 11 for supplying the optical sheet materials 12a to 12d and the sheet roll 13b for supplying the blade contact sheet 13a have a back tension adjusting mechanism (not shown) for applying tension to the optical sheet materials 12a to 12d and the blade contact sheet 13a. Furthermore, the optical sheet materials 12a to 12d and the blade contact sheet 13a are sandwiched by a pair of conveying rollers (not shown). Then, by rotating the pair of conveying rollers, the optical sheet materials 12a to 12d and the blade contact sheet 13a are pulled out from the slit roll 11 blade contact sheet roll 13b, and the optical sheet materials 12a to 12d and the blade contact sheet 13a are moved in the longitudinal direction. Transport.
　次に、図３を用いて本発明に従った切出し部１９の構成及び動作を説明する。 Next, the configuration and operation of the cutout unit 19 according to the present invention will be described with reference to FIG.
　切出し部１９は、支持ローラ５０、折返しローラ５１、押さえローラ５２から構成されており、これら支持ローラ５０、折返しローラ５１、押さえローラ５２は、それぞれ回転自在に構成されている。折返しローラ５１の回転軸は支持ローラ５０の回転軸を中心に揺動可能になっており、それにより折返しローラ５１は第一の位置Ｄ、および第二の位置Ｅをとる。ここで、支持ローラ５０に接する点を通りかつ搬送体３５の搬送方向Ａに水平な直線と、支持ローラ５０および折返しローラ５１の両方に接する直線とがなす角度θが、折返しローラ５１の位置に応じて鋭角θ１と鋭角θ２とをとる。 The cutting unit 19 includes a support roller 50, a folding roller 51, and a pressing roller 52. The supporting roller 50, the folding roller 51, and the pressing roller 52 are configured to be rotatable. The rotating shaft of the folding roller 51 can swing around the rotating shaft of the support roller 50, whereby the folding roller 51 takes a first position D and a second position E. Here, an angle θ formed by a straight line passing through a point in contact with the support roller 50 and horizontal in the transport direction A of the transport body 35 and a straight line in contact with both the support roller 50 and the return roller 51 is the position of the return roller 51. Accordingly, an acute angle θ1 and an acute angle θ2 are taken.
　図３において、３５は、図２を参照して既に説明した通り、光学シート積層体２１を抜きカス３６と共に搬送するための搬送体である。即ち、光学シート積層体２１は、刃当てシート１３ａ上で、後で捨てられることになる抜きカス３６内に留まった状態で搬送体３５により矢印Ｃ方向に移動することになる。 3, 35 is a transport body for transporting the optical sheet laminated body 21 together with the dregs 36 as already described with reference to FIG. 2. That is, the optical sheet laminate 21 is moved in the direction of arrow C by the transport body 35 while remaining in the punched waste 36 that will be discarded later on the blade contact sheet 13a.
　搬送体３５は、支持ローラ５０、押さえローラ５２の間をとおり、且つ、折返しローラ５１に巻きつけられて矢印Ａ方向に移動し、光学シート積層体２１を搬送矢印Ａ方向に搬送する。５３は、搬送体３５の方向を転換するためのローラであり、必要に応じて適宜設けられる。 The conveyance body 35 passes between the support roller 50 and the pressing roller 52 and is wound around the folding roller 51 and moves in the direction of arrow A, thereby conveying the optical sheet laminate 21 in the direction of conveyance arrow A. 53 is a roller for changing the direction of the conveyance body 35, and is suitably provided as needed.
　まず、角度θをθ１の状態にしておき、搬送体３５を、支持ローラ５０と押さえローラ５２との間を通過させて、折返しローラ５１に巻きつける。押さえローラ５２は搬送体３５の上方から搬送幅方向の中央部分を押さえていて、押圧手段として動作しており、搬送体３５の最上面との摩擦で従動回転する。 First, the angle θ is set to θ1, and the conveyance body 35 is passed between the support roller 50 and the pressing roller 52 and wound around the folding roller 51. The pressing roller 52 presses the central portion in the transport width direction from above the transport body 35, operates as a pressing unit, and is rotated by friction with the uppermost surface of the transport body 35.
　この状態で、光学シート積層体２１が抜きカス３６内に留まった状態の搬送体３５（以後、光学シート積層体２１が抜きカス３６内に留まった状態の搬送体３５を「切出し前搬送体３５」という）を、打抜いた光学シート積層体２１の１ピッチ分（１個分）送る。このとき、光学シート積層体２１は、支持ローラ５０と押さえローラ５２で狭持されており、切出し前搬送体３５が支持ローラ５０上を通過する時、抜きカス３６と刃当てシート１３ａは角度θ１分だけ下方に向かうことになるが、光学シート積層体２１は、抜きカス部分からは打ち抜かれており、従って、光学シート積層体２１には下方に向かう力が働かず、抜きカス３６と刃当てシート１３ａから分離されることになる。 In this state, the transport body 35 in a state where the optical sheet laminated body 21 remains in the extracted residue 36 (hereinafter, the transport body 35 in a state where the optical sheet laminated body 21 remains in the removed residue 36 is referred to as a “pre-cutting transport body 35”. “)” Is sent for one pitch (one piece) of the punched optical sheet laminate 21. At this time, the optical sheet laminated body 21 is sandwiched between the support roller 50 and the pressing roller 52, and when the pre-cutting transport body 35 passes over the support roller 50, the punched waste 36 and the blade contact sheet 13a have an angle θ1. However, the optical sheet laminate 21 is punched from the punched-out portion. Therefore, no downward force is applied to the optical sheet laminate 21, and the punched-out piece 36 and the blade pad are applied. It will be separated from the sheet 13a.
　角度θ１を小さく設定しておくことで、抜きカス３６が支持ローラ５０へ巻き付けられることで発生する材料間の内外周差を小さくすることができるため、抜きカス３６に発生する歪は光学シート積層体２１の姿勢を乱すようなものではない。よって、光学シート積層体２１はその姿勢を乱さず安定して抜きカス３６や刃当てシート１３ａから分離できる。図３は、そのときの状態を模式的に示している。 By setting the angle θ1 small, it is possible to reduce the difference between the inner and outer circumferences of the material generated by winding the punched squirt 36 around the support roller 50. The posture of the body 21 is not disturbed. Therefore, the optical sheet laminate 21 can be stably separated from the punched residue 36 and the blade contact sheet 13a without disturbing the posture thereof. FIG. 3 schematically shows the state at that time.
　そして、切出し前搬送体３５の送りを停止した後、図３中に破線で示すとおり、角度θを第２の位置であるθ２の状態へ移す。光学シート積層体２１の上流側端部は支持ローラ５０と押さえローラ５２で狭持されており、従って、光学シート積層体２１は、図３に示されたとおりの状態を維持するが、刃当てシート１３ａや抜きカス３６は折返しローラ５１の移動に伴って、更に下方へ下がり、光学シート積層体２１は抜きカス３６から完全に分離される。このとき、抜きカス３６に発生する歪は大きいが、既に光学シート積層体２１とは分離されており、光学シート積層体２１の姿勢を乱すことはない。 Then, after stopping the feeding of the pre-cutting carrier 35, the angle θ is shifted to the second position θ2, as indicated by a broken line in FIG. The upstream end portion of the optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52. Therefore, the optical sheet laminate 21 maintains the state shown in FIG. With the movement of the folding roller 51, the sheet 13a and the punched waste 36 are further lowered downward, and the optical sheet laminate 21 is completely separated from the punched waste 36. At this time, although the distortion generated in the punched residue 36 is large, it is already separated from the optical sheet laminate 21, and the posture of the optical sheet laminate 21 is not disturbed.
　刃当てシート１３ａや抜きカス３６が下がり、光学シート積層体２１のみが突き出された状態となり、光学シート積層体２１が把持可能となった時点で、把持ハンド２２（図１参照、シート積層体受取り手段）によって、光学シート積層体２１を把持する。把持ハンド２２で把持完了後、切出し部１９は搬送方向上流側へ移動する。これにより、光学シート積層体２１の支持が切出し部１９から把持ハンドに移り、受け渡しが完了する。 When the blade contact sheet 13a and the punched debris 36 are lowered and only the optical sheet laminate 21 is protruded, and the optical sheet laminate 21 can be gripped, the gripping hand 22 (see FIG. 1, receiving the sheet laminate) The optical sheet laminate 21 is held by the means. After gripping with the gripping hand 22, the cutting unit 19 moves to the upstream side in the transport direction. As a result, the support of the optical sheet laminate 21 is transferred from the cutout portion 19 to the gripping hand, and the delivery is completed.
　このとき、例えば、角度θ１は０°（すなわち水平）～３０°、θ２はθ１の２倍以上が望ましい。θ１はわずかに角度が付いている程度が好ましく、３０°以下が良い。θ１に角度が付いていると、切出し前搬送体３５が支持ローラ５０上を通過し、光学シート積層体２１の切断部が、抜きカス３６が僅かに下方に下がる部分で、幅方向の２点で抜きカス３６と分離していく。また、θ１が小さいほど抜きカス３６に内外周差が発生せず、光学シート積層体２１の切出しに与える影響が小さくなる。 At this time, for example, the angle θ1 is preferably 0 ° (that is, horizontal) to 30 °, and θ2 is preferably at least twice as large as θ1. θ1 is preferably a slight angle, preferably 30 ° or less. If the angle θ1 is angled, the pre-cutting conveyance body 35 passes over the support roller 50, and the cut portion of the optical sheet laminate 21 is a portion where the punched portion 36 is slightly lowered downward at two points in the width direction. Then, it is separated from the waste residue 36. Further, as θ1 is smaller, the inner / outer circumference difference is not generated in the punched residue 36, and the influence on the cutting out of the optical sheet laminate 21 is reduced.
　角度θ２は、光学シート積層体２１の受け渡しを行うための把持ハンドが光学シート積層体２１を確実に把持するために十分なスペースを確保できるために設定されるものであり、刃当てシート１３ａや抜きカス３６を逃がしておくことができるように設定される。
また、押さえローラ５２と支持ローラ５０の位置関係を調整可能とすることにより光学シート積層体２１上流側端部の狭持状態を変化させて、切出した光学シート積層体２１の姿勢を調整することが可能となる。 The angle θ2 is set so that a gripping hand for delivering the optical sheet laminate 21 can secure a sufficient space to securely grip the optical sheet laminate 21, and the blade contact sheet 13a or It is set so that the removal residue 36 can be released.
Further, by adjusting the positional relationship between the pressing roller 52 and the support roller 50, the holding state of the upstream end portion of the optical sheet laminate 21 is changed, and the posture of the cut out optical sheet laminate 21 is adjusted. Is possible.
　図４を用いて切出し部１９の動作を更に詳細に説明する。 The operation of the cutout unit 19 will be described in more detail with reference to FIG.
　図１、図２を参照して説明したとおり、打抜き手段１７で所望の形状に打抜かれた光学シート積層体２１は、刃当てシート１３ａ上で周囲を打抜きカス３６で囲まれた状態で切出し前搬送体３５により搬送されることになるが、図４では動作をわかりやすくするため、打抜き手段１７と打抜きカス３６を図示していない。そして、所望の形状に打抜かれた光学シート積層体２１を、その位置がわかるように明示して記載している。 As described with reference to FIGS. 1 and 2, the optical sheet laminate 21 punched into a desired shape by the punching unit 17 is not cut out in a state where the periphery is surrounded by the punching scraps 36 on the blade pad sheet 13 a. Although it is transported by the transport body 35, the punching means 17 and the punching waste 36 are not shown in FIG. 4 for easy understanding of the operation. The optical sheet laminate 21 punched into a desired shape is clearly shown so that its position can be understood.
　切出し前搬送体３５の搬送は、シート搬送機構４０によって行われる。シート搬送機構４０は、主として、固定側のシート把持部５５と移動側のシート把持部５６とにより構成されている。 The conveyance of the pre-cut conveyance body 35 is performed by the sheet conveyance mechanism 40. The sheet conveying mechanism 40 mainly includes a fixed-side sheet gripping portion 55 and a moving-side sheet gripping portion 56.
　シート搬送機構４０の固定側のシート把持部５５は、切出し前搬送体３５の幅方向端部を把持し、所定の期間、切出し前搬送体３５を固定支持する。また、シート搬送機構４０の移動側のシート把持部５６は、切出し前搬送体３５の幅方向端部を把持しながら予め決められた所定の距離だけ移動する。 The sheet gripping portion 55 on the fixed side of the sheet transport mechanism 40 grips the widthwise end of the pre-cutting transport body 35 and fixes and supports the pre-cutting transport body 35 for a predetermined period. Further, the sheet gripping portion 56 on the moving side of the sheet transport mechanism 40 moves by a predetermined distance while gripping the width direction end portion of the pre-cutting transport body 35.
　切出し前搬送体３５を固定側のシート把持部５５で把持している間に、移動側のシート把持部５６は切出し前搬送体３５を把持せず搬送上流側に移動し、移動完了と同時に切出し前搬送体３５を把持する。移動側のシート把持部５６が切出し前搬送体３５を把持した後、固定側のシート把持部５５は切出し前搬送体３５を開放する。固定側のシート把持部５５が切出し前搬送体３５を開放完了した後、移動側のシート把持部５６が所定の位置まで移動する。 While the pre-cutting conveyance body 35 is gripped by the fixed-side sheet gripping portion 55, the moving-side sheet gripping portion 56 moves to the upstream side of the conveyance without gripping the pre-cutting conveyance body 35, and is cut out upon completion of the movement. The front conveyance body 35 is gripped. After the moving-side sheet gripping part 56 grips the pre-cutting conveyance body 35, the fixed-side sheet gripping part 55 opens the pre-cutting conveyance body 35. After the fixed-side sheet gripping portion 55 completes opening the pre-cutting conveyance body 35, the moving-side sheet gripping portion 56 moves to a predetermined position.
　切出し前搬送体３５を把持したまま移動することによって移動側のシート把持部５６が移動した距離分、切出し前搬送体３５が移動搬送されることになる。固定側のシート把持部５５が再度切出し前搬送体３５を把持し、移動側のシート把持部５６が切出し前搬送体３５を開放後、再び、移動側のシート把持部５６が搬送上流側の所定の位置まで移動する。これを繰り返し、シートを間欠搬送する。 By moving while holding the pre-cutting conveyance body 35, the pre-cutting conveyance body 35 is moved and conveyed by the distance moved by the sheet gripping portion 56 on the moving side. After the fixed-side sheet gripping portion 55 grips the pre-cutting conveyance body 35 again, and the moving-side sheet gripping portion 56 opens the pre-cutting conveyance body 35, the moving-side sheet gripping portion 56 again returns to the predetermined upstream side of the conveyance. Move to the position. This is repeated and the sheet is intermittently conveyed.
　図４（ａ）は、シート搬送機構４０の固定側のシート把持部５５が切出し前搬送体３５を開放し、移動側のシート把持部５６が切出し前搬送体３５を把持して所定距離移動している際の状態を示しており、切出し前搬送体３５が矢印Ａの方向に搬送されている。この時、折返しローラ５１は第一の位置にある。また、光学シート積層体２１は支持ローラ５０と押さえローラ５２の間を通過する。押さえローラ５２は光学シート積層体２１を上方から所定の力で押さえている。押さえローラ５２はこの光学シート積層体２１の表層との摩擦により回転する。押さえローラ５２は比重が小さく、弱いトルクで回転し、光学シート積層体２１の表層が下層とずれないように調整される。 In FIG. 4A, the fixed-side sheet gripping portion 55 of the sheet transport mechanism 40 opens the pre-cutting transport body 35, and the moving-side sheet gripping portion 56 grips the pre-cutting transport body 35 and moves a predetermined distance. The state before the cutting is shown, and the pre-cutting conveyance body 35 is conveyed in the direction of arrow A. At this time, the folding roller 51 is in the first position. Further, the optical sheet laminate 21 passes between the support roller 50 and the pressing roller 52. The pressing roller 52 presses the optical sheet laminate 21 from above with a predetermined force. The pressing roller 52 rotates due to friction with the surface layer of the optical sheet laminate 21. The pressing roller 52 has a small specific gravity, rotates with a weak torque, and is adjusted so that the surface layer of the optical sheet laminate 21 does not shift from the lower layer.
　光学シート積層体２１は支持ローラ５０と押さえローラ５２とに狭持され、一方、抜きカス３６及び刃当てシート１３ａは折返しローラ５１に巻きつけられ、アイドラ５３、アイドラ５４等を介して、図４中には図示されていない抜きカスローラ２０へ搬送される。 The optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52, while the punching waste 36 and the blade contact sheet 13a are wound around the folding roller 51, and the idler 53, the idler 54, and the like are passed through FIG. The paper is conveyed to a punching roller 20 (not shown).
　このとき、光学シート積層体２１と、抜きカス３６及び刃当てシート１３ａとは進行方向が異なるため、分離されることになる。光学シート積層体２１は支持ローラ５０と押さえローラ５２とに狭持されており、ほぼ直進する。抜きカス３６及び刃当てシート１３ａは折返しローラ５１の方向へ搬送され、支持ローラ５０上で光学シート積層体２１と分離される。このようにして、光学シート積層体２１と抜きカス３６は支持ローラ５０上の幅方向２点で分離していく。抜きカス３６の支持ローラ５０への巻きつけはわずかであり、抜きカス３６に発生する歪は小さく、従って、抜きカス３６は光学シート積層体２１の姿勢に影響しない。 At this time, the optical sheet laminate 21, the punched piece 36, and the blade contact sheet 13a are separated because they have different traveling directions. The optical sheet laminate 21 is sandwiched between the support roller 50 and the pressing roller 52 and travels substantially straight. The extraction residue 36 and the blade contact sheet 13 a are conveyed toward the folding roller 51 and separated from the optical sheet laminate 21 on the support roller 50. In this way, the optical sheet laminate 21 and the punched residue 36 are separated at two points in the width direction on the support roller 50. The winding of the punched debris 36 around the support roller 50 is slight, and the distortion generated in the punched debris 36 is small. Therefore, the punched debris 36 does not affect the posture of the optical sheet laminate 21.
　移動側のシート把持部５６が所定の距離の移動を終了すると、図４（ｂ）に示すように、シート搬送が停止した状態で折返しローラ５１が第二の位置へ移動する。これにより、光学シート積層体２１と抜きカス３６が完全に分離され、光学シート積層体２１が切り出される。また、折返しローラ５１が第二の位置へ移動することで抜きカス３６が退避位置に移動するため、光学シート積層体２１は把持ハンド２２で把持可能となる。 When the movement-side sheet gripper 56 finishes moving a predetermined distance, the folding roller 51 moves to the second position with the sheet conveyance stopped, as shown in FIG. 4B. As a result, the optical sheet laminate 21 and the cut residue 36 are completely separated, and the optical sheet laminate 21 is cut out. Further, since the punching roller 36 is moved to the retracted position when the folding roller 51 is moved to the second position, the optical sheet laminate 21 can be gripped by the gripping hand 22.
　最後に図４（ｃ）に示すように、シート積層体２１を把持ハンド２２が把持した後、支持ローラ５０、折返しローラ５１、押さえローラ５２等より成る切出し部１９がシート搬送上流方向へ移動する。固定側のシート把持部５５が切出し前搬送体３５を把持しているため、切出し部１９がシート搬送上流方向へ移動することによって、余った抜きカスは下流方向へ送られる。 Finally, as shown in FIG. 4C, after the sheet stack 21 is gripped by the gripping hand 22, the cutout portion 19 including the support roller 50, the folding roller 51, the pressing roller 52, and the like moves in the upstream direction of sheet conveyance. . Since the fixed-side sheet gripping portion 55 grips the pre-cutting conveying body 35, the cutting portion 19 is moved in the upstream direction of sheet conveyance, so that the excess punched waste is sent in the downstream direction.
　これにより、シート積層体２１の支持が切出し部１９から把持ハンド２２へ移動し、シート積層体２１の切出し、把持ハンド２２との受け渡しが完了する。また、シート切出し部１０が後退することによってシート積層体を切出すため、シート積層体２１のタブ部等が抜きカスと引っかかってシート積層体２１の姿勢を乱すことがなくなる。略矩形であるシート積層体２１が搬送体３５の搬送方向に対し角度を持っている場合にも、同様の効果がある。 Thereby, the support of the sheet laminate 21 is moved from the cutout portion 19 to the gripping hand 22, and the cutout of the sheet laminate 21 and the delivery with the gripping hand 22 is completed. Further, since the sheet laminated body is cut out when the sheet cut-out portion 10 is retracted, the tab portion of the sheet laminated body 21 is not caught by the scrap and the posture of the sheet laminated body 21 is not disturbed. The same effect can be obtained also when the substantially rectangular sheet laminate 21 has an angle with respect to the conveyance direction of the conveyance body 35.
　把持ハンド２２移動完了後に、切出し前搬送体３５を送りながら、支持ローラ５０、折返しローラ５１、押さえローラ５２等より成る切出し部１９を元の位置に戻し、図４（ａ）の状態となる。 After completion of the movement of the gripping hand 22, the cutting unit 19 including the support roller 50, the folding roller 51, and the pressing roller 52 is returned to the original position while feeding the pre-cutting conveyance body 35, and the state shown in FIG.
　以上の動作を繰り返すことにより、切出し前搬送体３５から光学シート積層体２１を安定して連続に切出すことができる。これらの操作は、ほとんど人手を必要とせず、全工程を自動化できるため、人手を介入させることに伴うゴミ混入の問題が発生しない。 By repeating the above operations, the optical sheet laminate 21 can be stably and continuously cut from the pre-cutting conveyance body 35. Since these operations require almost no manual operation and the entire process can be automated, there is no problem of contamination due to manual intervention.
　また、支持ローラ５０、折返しローラ５１、押さえローラ５２が一体となって、シート積層体２１の切り出し方向と逆方向に移動する。これにより、切出し部１９から把持ハンド２２へのシート積層体２１の受け渡しが確実に実現できる。 Further, the support roller 50, the folding roller 51, and the pressing roller 52 are integrally moved in the direction opposite to the cutting direction of the sheet laminate 21. Thereby, delivery of the sheet | seat laminated body 21 from the cutting part 19 to the holding | grip hand 22 is reliably realizable.
　〔実施の形態２〕
　次に、図５、図６を用いて本発明の実施の形態２に係る光学シート積層体２１の切出し部１９を説明する。 [Embodiment 2]
Next, the cut-out portion 19 of the optical sheet laminate 21 according to Embodiment 2 of the present invention will be described with reference to FIGS.
　本発明の実施の形態２では、図３に示した実施の形態１と押圧手段のみ異なり、それ以外の部材については同じであるので、図３に示した実施の形態１と同じ部材には同じ番号を付与し、詳細な説明は省略する。 In the second embodiment of the present invention, only the pressing means is different from the first embodiment shown in FIG. 3, and the other members are the same. Therefore, the same members as those in the first embodiment shown in FIG. 3 are the same. Numbers are given and detailed description is omitted.
　実施の形態２において、押圧手段は、把持チャック固定部６１、把持チャック移動部６２からなる把持チャック６０で構成されており、切出し前搬送体３５の光学シート積層体２１搬送方向上流側端部を刃当てシート１３ａとともに把持し、切出し前搬送体３５の搬送と同期して搬送方向に移動する。支持ローラ５０と押さえローラ５２の動作は前述の実施例と同じである。把持チャック６０を採用することによって、（刃当てシートは介するが）シート積層体のみを確実に把持できるので、切出しが安定する。 In the second embodiment, the pressing means is configured by a gripping chuck 60 including a gripping chuck fixing unit 61 and a gripping chuck moving unit 62, and the upstream end portion in the transporting direction of the optical sheet laminate 21 of the transporting body 35 before cutting. It is gripped together with the blade contact sheet 13a and moves in the transport direction in synchronization with the transport of the pre-cutting transport body 35. The operations of the support roller 50 and the pressing roller 52 are the same as those in the above-described embodiment. By adopting the gripping chuck 60, it is possible to reliably grip only the sheet stack (although the blade contact sheet is interposed), so that the cutting is stable.
　図６を用いて、実施の形態２における切出し部１９の動作を説明する。 The operation of the cutout unit 19 according to the second embodiment will be described with reference to FIG.
　図６（ａ）に示すように、切出し前搬送体３５の光学シート積層体２１搬送方向上流側端部は、刃当てシート１３ａとともに把持チャック６０で把持される。その後、図中の矢印Ａの方向に切出し前搬送体３５が搬送される。このとき、把持チャック６０は切出し前搬送体３５の搬送と同期して、切出し前搬送体３５の端部を把持したまま切出し前搬送体３５の搬送方向と平行に移動する。 As shown in FIG. 6 (a), the upstream end of the optical sheet laminate 21 in the conveyance direction of the conveyance body 35 before cutting is grasped by the grasping chuck 60 together with the blade contact sheet 13a. Thereafter, the pre-cutting transport body 35 is transported in the direction of arrow A in the drawing. At this time, the gripping chuck 60 moves in parallel with the transport direction of the pre-cutting transport body 35 while gripping the end of the pre-cutting transport body 35 in synchronization with the transport of the pre-cutting transport body 35.
　このとき切出し前搬送体３５は、支持ローラ５０上で光学シート積層体２１と打抜きカス３６、および刃当てシート１３ａに分離され、図６（ｂ）に示す状態となる。このとき、折返しローラ５１は第一の位置にある。 At this time, the pre-cutting conveying body 35 is separated on the support roller 50 into the optical sheet laminated body 21, the punching residue 36, and the blade contact sheet 13a, and is in a state shown in FIG. 6B. At this time, the folding roller 51 is in the first position.
　次に図６（ｃ）に示すように、折返しローラ５１が第二の位置へ移動する。これにより光学シート積層体２１と抜きカス３６が完全に分離される。また、折返しローラ５１が第二の位置へ移動することで、抜きカス３６が退避位置に移動するため、光学シート積層体２１が把持ハンド２２で把持可能となる。 Next, as shown in FIG. 6C, the folding roller 51 moves to the second position. Thereby, the optical sheet laminated body 21 and the punched residue 36 are completely separated. Further, since the punching roller 36 is moved to the retracted position by the folding roller 51 moving to the second position, the optical sheet laminate 21 can be gripped by the gripping hand 22.
　次に図６（ｄ）に示すように、シート積層体２１を把持ハンド２２が把持した後、把持チャック６０を開放し、図６（ｅ）に示すように、把持チャック６０、支持ローラ５０、折返しローラ５１を含む切出し部１９がシート搬送上流方向へ移動する。これにより、光学シート積層体２１の切出し、把持ハンド２２との受け渡しが完了する。 Next, as shown in FIG. 6D, after the gripping hand 22 grips the sheet laminate 21, the gripping chuck 60 is opened, and as shown in FIG. 6E, the gripping chuck 60, the support roller 50, The cutting unit 19 including the folding roller 51 moves in the upstream direction of sheet conveyance. Thereby, the cutting out of the optical sheet laminate 21 and the delivery with the gripping hand 22 are completed.
　把持ハンド２２の移動完了後に、支持ローラ５０、折返しローラ５１及び把持チャック６０等が元の位置に戻り、図６（ａ）の状態となる。 After completion of the movement of the gripping hand 22, the support roller 50, the folding roller 51, the gripping chuck 60, etc. return to their original positions, and the state shown in FIG.
　以上の動作を繰り返すことにより、切出し前搬送体３５から光学シート積層体２１を安定して連続に切出すことができる。 By repeating the above operations, the optical sheet laminate 21 can be stably and continuously cut from the pre-cutting conveyance body 35.
　なお、本発明は上述した各実施形態に限定されるものではない。当業者は、請求項に示した範囲内において、本発明をいろいろと変更できる。すなわち、請求項に示した範囲内において、適宜変更された技術的手段を組み合わせれば、新たな実施形態が得られる。 In addition, this invention is not limited to each embodiment mentioned above. Those skilled in the art can make various modifications to the present invention within the scope of the claims. That is, a new embodiment can be obtained by combining appropriately changed technical means within the scope of the claims.
　上述の課題を解決するために、本願の発明に係るシート積層体切出方法では、
　上記第１の方向は、０度より大きく３０度以下の範囲であり、上記第２の方向は、６０度から９０度の範囲であることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting method according to the invention of the present application,
The first direction is a range greater than 0 degree and less than or equal to 30 degrees, and the second direction is a range of 60 degrees to 90 degrees.
　この発明によれば、所定形状のシート積層体が打ち抜かれている長尺積層シートから、シート積層体を取り出す際のシート積層体自体への姿勢の乱れを最小化できる。 According to the present invention, it is possible to minimize the posture disorder to the sheet laminate itself when the sheet laminate is taken out from the long laminate sheet in which the sheet laminate having a predetermined shape is punched.
　上述の課題を解決するために、本願の発明に係るシート積層体切出方法では、
　上記シート積層体は光学シート積層体であることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting method according to the invention of the present application,
The sheet laminate is an optical sheet laminate.
　この発明によれば、所定形状の光学シート積層体を、その姿勢を乱すことなく安定して切り出すことができる。 According to the present invention, the optical sheet laminate having a predetermined shape can be stably cut out without disturbing the posture.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記押圧手段、上記支持手段、上記折返し手段のうち少なくともいずれかは、回転可能なローラにより構成されていることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
At least one of the pressing means, the support means, and the folding means is configured by a rotatable roller.
　この発明によれば、極めて簡単な構成で、所定形状のシート積層体が打ち抜かれている長尺積層シートから、シート積層体の姿勢を乱さず安定してシート積層体を切り出すことができるシート積層体切出装置を提供できる。なお、折返し手段がローラにより構成されていると、シートの巻きつけが大きいために最も好ましい。 According to the present invention, a sheet laminate that can be stably cut out from a long laminate sheet in which a sheet laminate having a predetermined shape is punched out without disturbing the posture of the sheet laminate with an extremely simple configuration. A body cutting device can be provided. Note that it is most preferable that the folding means is constituted by a roller because the winding of the sheet is large.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記支持手段および上記押圧手段が円筒体であり、
　上記押圧手段としてのローラと上記支持手段としての円筒体との間において、上記シート積層体を挟持することを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
The supporting means and the pressing means are cylindrical bodies,
The sheet laminate is sandwiched between a roller as the pressing means and a cylindrical body as the support means.
　この発明によれば、押圧手段としてのローラと支持手段としての円筒体との間においてシート積層体を挟持し、押圧角度を調整することによって、切出し時のシート積層体の姿勢を調整できる。結果、シート積層体の受け渡しを確実にすることができる。 According to the present invention, the posture of the sheet laminated body at the time of cutting can be adjusted by sandwiching the sheet laminated body between the roller as the pressing means and the cylindrical body as the supporting means and adjusting the pressing angle. As a result, delivery of the sheet laminate can be ensured.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記押圧手段は、固定部と移動部よりなる把持チャックより構成されていることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
The pressing means is characterized by comprising a gripping chuck comprising a fixed part and a moving part.
　この発明によれば、切り出すことになるシート積層体自体を確実に把持することができることとなり、製造時の誤動作を減らすことができる。 According to the present invention, the sheet laminate itself to be cut out can be securely gripped, and malfunctions during manufacturing can be reduced.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記押圧手段と上記支持手段とによって上記シート積層体を挟持すると共に、
　上記押圧手段と上記支持手段との位置関係によって、上記シート積層体の切り出し方向を調節することを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
While sandwiching the sheet laminate by the pressing means and the support means,
The cutting direction of the sheet laminate is adjusted by the positional relationship between the pressing means and the supporting means.
　この発明によれば、シート積層体の切出し方向を的確に調整できるので、確実にシート積層体を取り出すことができる。 According to the present invention, since the cutting direction of the sheet laminate can be adjusted accurately, the sheet laminate can be reliably taken out.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記押圧手段、上記支持手段、および上記折返し手段とが、一体となって、上記シート積層体の切り出し方向と逆方向に移動することを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
The pressing means, the support means, and the folding means move together in the direction opposite to the cut-out direction of the sheet laminate.
　この発明によれば、シート積層体切出装置とシート積層体取出し手段との間において、シート積層体を確実に受け渡すことができる。 According to the present invention, the sheet laminate can be reliably delivered between the sheet laminate cutting device and the sheet laminate taking-out means.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記第１の位置は、上記抜きカスの進行方向を０度以上３０度以下の範囲に定める位置であり、上記第２の位置は、上記抜きカスの進行方向を６０度以上９０度以下の範囲に定める位置であることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
The first position is a position that determines the traveling direction of the punched dregs in a range of 0 degrees to 30 degrees, and the second position is a range of 60 degrees to 90 degrees in advancing direction of the punched dregs. It is characterized by the position determined in
　この発明によれば、シート積層体の切り出し分離を確実且つ、安定して行うことができるシート積層体切出装置を提供できる。 According to the present invention, it is possible to provide a sheet laminate cutting apparatus that can reliably and stably cut and separate a sheet laminate.
　上述の課題を解決するために、本願の発明に係るシート積層体切出装置では、
　上記折返し手段は、上記支持手段を中心に前記第１の位置と第２の位置の間を揺動可能に構成されていることを特徴としている。 In order to solve the above problems, in the sheet laminate cutting apparatus according to the invention of the present application,
The folding means is configured to be swingable between the first position and the second position around the support means.
　この発明によれば、簡単な構成で確実な動作を行うことができるシート積層体切出装置を提供できる。 According to the present invention, it is possible to provide a sheet laminate cutting apparatus that can perform a reliable operation with a simple configuration.
　上述の課題を解決するために、本願の発明に係る光学シート積層体では、
　上述のシート積層体切出方法によって製造される光学シート積層体であることを特徴としている。 In order to solve the above-mentioned problem, in the optical sheet laminate according to the invention of the present application,
It is an optical sheet laminate manufactured by the above-described sheet laminate cutout method.
　上述の課題を解決するために、本願の発明に係るバックライトユニットでは、
　上述のシート積層体切出方法によって製造される光学シート積層体を用いて、液晶表示装置等のバックライトユニットであることを特徴としている。 In order to solve the above-described problem, in the backlight unit according to the invention of the present application,
It is a backlight unit such as a liquid crystal display device using the optical sheet laminate manufactured by the above-described sheet laminate cutting method.
　この発明によれば、優れた特性のバックライトユニットを提供できる。 According to the present invention, a backlight unit having excellent characteristics can be provided.
　発明の詳細な説明の項においてなされた具体的な実施形態または実施例は、あくまでも、本発明の技術内容を明らかにするものであって、そのような具体例にのみ限定して狭義に解釈されるべきものではなく、本発明の精神と次に記載する請求の範囲内で、いろいろと変更して実施することができるものである。 The specific embodiments or examples made in the detailed description section of the invention are merely to clarify the technical contents of the present invention, and are limited to such specific examples and are interpreted in a narrow sense. It should be understood that various modifications may be made within the spirit of the invention and the scope of the following claims.
　本発明によれば、液晶表示装置のバックライトユニット等に使用される複数の光学シートを積層した積層体であって、本体部分において接着部を持たない、且つ、優れた特性の光学シート積層体を提供することができる。液晶表示装置は、各種機器における表示装置として広く使用されており、産業上の利用可能性は高い。 According to the present invention, a laminated body in which a plurality of optical sheets used for a backlight unit of a liquid crystal display device and the like are laminated, and the optical sheet laminated body having no adhesive portion in the main body portion and having excellent characteristics. Can be provided. The liquid crystal display device is widely used as a display device in various devices and has high industrial applicability.
１０：バックライトユニット製造装置
１１ａ：第１層シートのスリットロール
１１ｂ：第２層シートのスリットロール
１１ｃ：第３層シートのスリットロール
１１ｄ：第４層シートのスリットロール
１２ａ～１２ｄ：光学シート材料
１３ａ：刃当てシート
１３ｂ：刃当てシートロール
１４ａ～１４ｅ：クリーニング手段
１５：第１の超音波ウエルダ
１６：第２の超音波ウエルダ
１７：打抜き手段
１９：切出し部
２１：光学シート積層体
２２：把持ハンド
２３：移動機構
２５：サブアッシイ
２６：サブアッシイ
２８：バックライトユニット
２９：遮光両面粘着シート
３０：搬送コンベア
３５：切出し前搬送体
３６：抜きカス
３８：組込部
３９：遮光両面粘着シート貼付部
５０：支持ローラ
５１：折返しローラ
５２：押さえローラ
５３：アイドラ
５４：アイドラ
５５：固定側のシート把持部
５６：移動側のシート把持部
６０：把持チャック
６１：把持チャック固定部
６２：把持チャック移動部
１００：液晶表示装置
１１０：光学シート積層体
１５０：バックライトユニット
１５１：液晶パネル
１５２：光源
１５３：導光板
１５４：反射板 10: Backlight unit manufacturing apparatus 11a: First layer sheet slit roll 11b: Second layer sheet slit roll 11c: Third layer sheet slit roll 11d: Fourth layer sheet slit rolls 12a to 12d: Optical sheet material 13a: blade contact sheet 13b: blade contact sheet rolls 14a to 14e: cleaning means 15: first ultrasonic welder 16: second ultrasonic welder 17: punching means 19: cutting part 21: optical sheet laminate 22: gripping Hand 23: Movement mechanism 25: Sub-assembly 26: Sub-assembly 28: Backlight unit 29: Light-shielding double-sided adhesive sheet 30: Conveyor 35: Transport body 36 before cutting 36: Unloading part 38: Built-in part 39: Light-shielding double-sided adhesive sheet pasting part 50 : Support roller 51: Folding roller 52: Pressing roller 53: Idler 4: idler 55: fixed-side sheet gripping part 56: moving-side sheet gripping part 60: gripping chuck 61: gripping chuck fixing part 62: gripping chuck moving part 100: liquid crystal display device 110: optical sheet laminate 150: backlight Unit 151: Liquid crystal panel 152: Light source 153: Light guide plate 154: Reflecting plate

Claims (13)

  1. 　所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出方法であって、
    　上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から押さえながら下方から支持すると共に、上記長尺積層シートの進行方向に対して水平または僅かに下方である第１の方向へ折り曲げて上記シート積層体の１個分の距離を移動させる第１の工程と、
    　上記シート積層体の移動を停止後、上記長尺積層シートを上記第１の方向より更に下方である第２の方向に折り曲げる第２の工程と、を有することを特徴とするシート積層体切出方法。     A sheet laminate cutting method for cutting out a sheet laminate of the predetermined shape from a long laminate sheet in which a sheet laminate of a predetermined shape is punched,
    A first direction in which the long laminated sheet in which the sheet laminated body of the predetermined shape is punched is supported from below while being pressed from above, and is horizontal or slightly below the traveling direction of the long laminated sheet A first step of folding the sheet laminate and moving the distance of one sheet laminate,
    A second step of bending the long laminated sheet in a second direction which is further below the first direction after stopping the movement of the sheet laminated body. Method.
  2. 　請求項１に記載のシート積層体切出方法において、
    　上記第１の方向は、０度以上３０度以下の範囲であり、上記第２の方向は、６０度から９０度の範囲であることを特徴とするシート積層体切出方法。     In the sheet laminated body cutting-out method according to claim 1,
    The sheet laminate cut-out method, wherein the first direction is in the range of 0 to 30 degrees, and the second direction is in the range of 60 to 90 degrees.
  3. 　請求項１に記載のシート積層体切出方法において、
    　上記シート積層体は光学シート積層体であることを特徴とするシート積層体切出方法。     In the sheet laminated body cutting-out method according to claim 1,
    The sheet laminate is a sheet laminate cut out method, wherein the sheet laminate is an optical sheet laminate.
  4. 　所定形状のシート積層体が打ち抜かれている長尺積層シートから、上記所定形状のシート積層体を切り出すシート積層体切出装置であって、
    　上記所定形状のシート積層体が打ち抜かれている長尺積層シートを、上方から抑える押圧手段と、下方から支持する支持手段と、移動可能で、上記長尺積層シートから上記所定形状のシート積層体が切り出された後の抜きカスの進行方向を変更するための折返し手段とを有し、
    　上記折返し手段は、上記抜きカスの進行方向を第１の方向に変更するための第１の位置と、上記抜きカスの進行方向を更に大きく変更するための第２の位置をとることを特徴とするシート積層体切出装置。     A sheet laminate cutting device for cutting out the sheet laminate of the predetermined shape from the long laminate sheet in which the sheet laminate of the predetermined shape is punched,
    A pressing means for holding the long laminated sheet from which the sheet laminated body of the predetermined shape is punched from above and a supporting means for supporting the long laminated sheet from below, and a movable sheet, and the sheet laminated body of the predetermined shape from the long laminated sheet. Folding means for changing the direction of travel of the punched residue after the
    The folding means takes a first position for changing the advancing direction of the extraction dregs to a first direction and a second position for changing the advancing direction of the extraction dregs further greatly. Sheet laminate cutting device.
  5. 　請求項４に記載のシート積層体切出装置において、
    　上記押圧手段、上記支持手段、および上記折返し手段のうち少なくともいずれかは、回転可能なローラにより構成されていることを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    At least one of the pressing unit, the supporting unit, and the folding unit is configured by a rotatable roller.
  6. 　請求項５に記載のシート積層体切出装置において、
    　上記支持手段および押圧手段が円筒体であり、
    　上記押圧手段としてのローラと上記支持手段としての円筒体との間において、上記シート積層体を挟持することを特徴とするシート積層体切出装置。     In the sheet laminated body cutting device according to claim 5,
    The supporting means and the pressing means are cylindrical bodies,
    A sheet laminate cutting device characterized in that the sheet laminate is sandwiched between a roller as the pressing means and a cylindrical body as the support means.
  7. 　請求項４に記載のシート積層体切出装置において、
    　上記押圧手段は、固定部と移動部よりなる把持チャックより構成されていることを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    The sheet pressing body cutting device according to claim 1, wherein the pressing means includes a gripping chuck including a fixed portion and a moving portion.
  8. 　請求項４に記載のシート積層体切出装置において、
    　上記押圧手段と上記支持手段とによって上記シート積層体を挟持すると共に、
    　上記押圧手段と上記支持手段との位置関係によって、上記シート積層体の切り出し方向を調節することを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    While sandwiching the sheet laminate by the pressing means and the support means,
    The sheet laminate cutting device, wherein a cutting direction of the sheet laminate is adjusted by a positional relationship between the pressing means and the support means.
  9. 　請求項４に記載のシート積層体切出装置において、
    　上記押圧手段、上記支持手段、および上記折返し手段とが、一体となって、上記シート積層体の切り出し方向と逆方向に移動することを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    The sheet laminate cutting device, wherein the pressing means, the support means, and the folding means are integrally moved in a direction opposite to the cutout direction of the sheet laminate.
  10. 　請求項４に記載のシート積層体切出装置において、
    　上記第１の位置は、上記抜きカスの進行方向を０度以上３０度以下の範囲に定める位置であり、上記第２の位置は、上記抜きカスの進行方向を６０度以上９０度以下の範囲に定める位置であることを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    The first position is a position that determines the traveling direction of the punched dregs in a range of 0 degrees to 30 degrees, and the second position is a range of 60 degrees to 90 degrees in advancing direction of the punched dregs. The sheet laminated body cutting device characterized in that the position is determined by the above.
  11. 　請求項４に記載のシート積層体切出装置において、
    　上記折返し手段は、上記支持手段を中心に前記第１の位置と第２の位置の間を揺動可能に構成されていることを特徴とするシート積層体切出装置。     In the sheet | seat laminated body cutting device of Claim 4,
    The sheet folding body cutting device, wherein the folding means is configured to be swingable between the first position and the second position around the support means.
  12. 　請求項１～３のいずれか１項に記載のシート積層体切出方法によって製造される光学シート積層体。 An optical sheet laminate produced by the sheet laminate cutout method according to any one of claims 1 to 3.
  13. 　請求項１２に記載の光学シート積層体を用いたバックライトユニット。 A backlight unit using the optical sheet laminate according to claim 12.
PCT/JP2009/067914 2008-10-17 2009-10-16 Method for cutting sheet laminate and cutting device thereof, optical sheet laminate, and backlight unit using it WO2010044463A1 (en)

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