JP2006058411A - Method and apparatus for bonding polarizing plate to liquid crystal panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for bonding a polarizing plate to a liquid crystal panel, with which accuracy of bonding is heightened, and bonding adjustment is simplified, and operating efficiency is improved owing to shortened operation time. <P>SOLUTION: By linearly transferring a bonding table 1 which sucks and holds a liquid crystal panel A on the lower face side, the liquid crystal panel A is successively transferred to a liquid crystal panel positioning position b, to a polarizing plate bonding position d, and to a liquid crystal panel discharging position e. An index table 2 is adopted for the purpose of supplying the polarizing plate B to the polarizing plate bonding position d, and respective positions of the index table 2 are set to a polarizing plate supplying position f, to a mold-release sheet releasing position g, to a polarizing plate positioning position h, and to the polarizing plate bonding position d. An operation of bonding the polarizing plate B to the liquid crystal panel A is conducted with a polarizing plate bonding roll 41 on the polarizing plate bonding position d of the bonding table 1 and the index table 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for attaching a polarizing plate to a liquid crystal panel, and more particularly to a method and an apparatus for supplying a polarizing plate to a liquid crystal panel by supplying the polarizing plate with a rotary table while linearly conveying the liquid crystal panel.

  Conventionally, various apparatuses for automatically attaching a polarizing plate to a liquid crystal panel have been proposed. These devices supply a liquid crystal panel that has undergone cullet cleaning or the like to a sticking table, and stick the adhesive surface of the polarizing plate from which the release sheet has been peeled off while pressing the liquid crystal panel with a sticking roller. .

  For attaching the polarizing plate to such a liquid crystal panel, four liquid crystal panel mounting parts are provided on an index type attaching table, and a panel supply part, a panel cleaning part, a liquid crystal panel attaching part, a panel discharging part, etc. The liquid crystal panel mounting portion is intermittently rotated between the four positions, and the polarizing plate is supplied to the polarizing plate attaching portion (for example, see Patent Documents 1 and 2).

Japanese Utility Model Publication No. 62-184527 (FIGS. 1 and 2) JP-A-8-87007 (first page, second page, FIGS. 1 and 5)

However, sticking of the polarizing plate by the above method has the following problems.
1) Since the liquid crystal panel side is rotated, it is necessary to provide a liquid crystal panel transport table (sticking table) on a plurality of liquid crystal panel mounting portions on the index table, and in order to keep the sticking accuracy constant, It is necessary to adjust the parallelism of a plurality of pasting tables according to the pasting rollers arranged in the liquid crystal panel pasting section, and to adjust the accuracy of each pasting table to the same level. It is very difficult to adjust the parallelism.

2) In addition, it is necessary to maintain the parallelism of the affixing rollers disposed in the liquid crystal panel affixing portion in the same manner as described above. Therefore, it is necessary to adjust the parallelism of the affixing rollers.

3) Since there are multiple pasting tables on the index table, and there are pasting units, cleaning units, take-out mechanisms, etc. at each of the surrounding positions, there is space for checking and adjusting the pasting table. There are few, and maintenance is very difficult.

4) During the operation of attaching the polarizing plate, the four operations of taking out the polarizing plate, peeling the release sheet, positioning the polarizing plate, and attaching the polarizing plate are performed in series at one location. Speeding up the peeling of the mold sheet is accompanied by generation of static electricity, and adversely affects the liquid crystal panel when the polarizing plate is attached. Therefore, it is difficult to speed up the supply side of the polarizing plate.

5) In the conventional index method, the liquid crystal panel is adsorbed from the lower side to the upper surface of the liquid crystal panel mounting portion provided on the pasting table, and the polarizing plate is pasted from the upper side by the pasting roller. Since the surface of the polarizing plate adsorption table is slid and pasted while adsorbing the surface of the polarizing plate, there is a problem that scratches and foreign matter are easily generated when the polarizing plate slides on the table surface.

  Therefore, an object of the present invention is to improve the accuracy and adjust by linearly moving the attachment table that sucks and conveys the liquid crystal panel, adopts an index table on the supply side of the polarizing plate, and reduces the number of attachment tables. It is another object of the present invention to provide a method and an apparatus for attaching a polarizing plate to a liquid crystal panel, which can improve efficiency by shortening the time by simultaneously performing the processes on the polarizing plate in parallel.

  In order to solve the above-described problems, the invention of claim 1 is directed to linearly moving a sticking table that holds and holds the liquid crystal panel on the lower surface side, thereby positioning the liquid crystal panel at the liquid crystal panel positioning position and polarizing plate sticking. The index table is used for supplying the polarizing plate to the position where the polarizing plate is attached, and the position of the index table is changed to the polarizing plate supply position, the release sheet peeling position, and the polarizing plate. A configuration in which the positioning position and the polarizing plate attachment position are set, the polarizing plate attachment positions of the attachment table and the index table are matched, and the polarizing plate is attached to the liquid crystal panel at this polarizing plate attachment position. It is.

  According to the second aspect of the present invention, a sticking table for adsorbing and holding the liquid crystal panel on the lower surface side is arranged so as to move linearly along the rail, and the liquid crystal panel positioning position and polarizing plate sticking are performed during the movement of the sticking table. The position for attaching the liquid crystal panel and the position for discharging the liquid crystal panel are set, and an index table is used for supplying the polarizing plate to the polarizing plate attaching position, and each position of the polarizing plate suction table provided on the index table is polarized on the polarizing plate suction table. The polarizing plate supply position for supplying the plate, the release sheet peeling position for peeling the release sheet from the polarizing plate held by the polarizing plate adsorption table, the polarizing plate positioning position for the polarizing plate adsorption table, and the polarizing plate attaching position Set and paste the polarizing plate of the pasting table and index table The only positions are matched, Paste rollers to move up and down and placed on the polarizing plate pasting position is obtained by adopting a configuration in which to perform the pasting a polarizing plate to the liquid crystal panel.

  The affixing roller can swing left and right, both ends are supported by elastic buffer members, and can have an automatic alignment structure that can follow the liquid crystal panel surface.

  According to the present invention, since the sticking table for sucking and transporting the liquid crystal panel is linearly moved and the index table is adopted on the supply side of the polarizing plate, the number of sticking tables for the liquid crystal panel can be reduced to one. Therefore, it is possible to make only the adjustment in two places, which required the parallel adjustment of the eight pasting tables including the front and back of the liquid crystal panel, leading to shortening of the manufacturing and maintenance time of the apparatus.

  In addition, the linearity of the LCD panel transport system improves the maintainability of the sticking table that requires high accuracy in parallelism, and allows the sticking table to be adjusted accurately, resulting in the polarizing plate sticking accuracy. Will improve.

  Furthermore, since the polarizing plate supply is set on the index table side, it is possible to perform the peeling of the release sheet of the polarizing plate and the pasting of the polarizing plate simultaneously in parallel, and the pasting time can be shortened. .

  In addition, since the liquid crystal panel is held by suction on the lower surface side of the pasting table, the polarizing plate is pasted from the lower side. Gravity can be used to support the polarizing plate during pasting, and the adsorption pressure of the polarizing plate is reduced. It can be attached without lowering or adsorbing, and as a result, scratches on the polarizing plate and generation of foreign matter can be prevented, and unevenness after bonding can be suppressed.

  Furthermore, the pasting table is moved from the liquid crystal panel positioning position to the liquid crystal panel discharge position, and the positioning work that requires time on the liquid crystal panel side is performed on a separate table from the pasting table. Since the polarizing plates can be attached in parallel, there is no problem due to the increase in the number of attaching tables, and the polarizing plate can be attached efficiently.

  In addition, if the pasting roller can swing left and right and both ends are supported by elastic cushioning members, the pasting roller has an automatic centering structure that follows the liquid crystal panel surface, making it easy to adjust the pasting roller. It becomes.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the polarizing plate affixing device to the liquid crystal panel according to the present invention has a transport system for the liquid crystal panel A linearly arranged so that the transport of the liquid crystal panel A and the sticking of the polarizing plate B are performed as one pasting. The index table 2 is used for supplying the polarizing plate B to the liquid crystal panel A, as well as the attaching table 1.

  In addition, since the polarizing plate B is attached to both surfaces of the liquid crystal panel A, as shown in the plan view of FIG. 1, the polarizing plate attaching device to the liquid crystal panel is arranged by arranging two front and rear linearly, The polarizing plate B is pasted on one surface side of the liquid crystal panel A by the pasting device, and the polarizing plate B is pasted on the other surface side of the liquid crystal panel A by the following pasting device. Since it is a structure, the structure of one sticking apparatus is demonstrated and it substitutes for description by attaching | subjecting the same code | symbol to the same part to the other sticking apparatus.

  The transport system of the liquid crystal panel in the above-mentioned pasting apparatus includes a liquid crystal panel supply conveyor 3 that horizontally supports the liquid crystal panel A and transports it forward, and a liquid crystal panel transfer table 4 disposed at the liquid crystal panel transfer position a. A liquid crystal panel positioning table 5 disposed at the liquid crystal panel positioning position b, a liquid crystal panel cleaner mechanism 6 disposed at the liquid crystal panel cleaning position c, a polarizing plate attaching position d, and a liquid crystal panel disposed at the liquid crystal panel discharge position e. The discharge table 7 is arranged in a straight line, and the pasting table 1 is linearly moved on these.

  As shown in FIG. 6, the liquid crystal panel transfer table 4 is moved up and down on the liquid crystal panel supply conveyor 3, horizontally moved back and forth between the liquid crystal panel supply conveyor 3 and the liquid crystal panel positioning table 5, and the liquid crystal panel positioning table 5. The upward and downward movements are appropriately given by the drive device, and as shown in FIG. 6A, the liquid crystal panel A on the liquid crystal panel supply conveyor 3 is adsorbed by descending at a standby position located above the liquid crystal panel supply conveyor 3. Then, ascends, moves forward and lowers on the liquid crystal panel positioning table 5 as shown in FIG. 6B, and when the liquid crystal panel A is placed on the liquid crystal panel positioning table 5, the suction is released and the liquid crystal panel positioning table 5 After the liquid crystal panel A is supplied to the liquid crystal panel A, the liquid crystal panel A is returned to the standby position by ascending and retreating as shown in FIG. It is.

  The liquid crystal panel positioning table 5 sucks and holds the liquid crystal panel A supplied to the upper surface, and can be linearly moved, rotated and moved up and down by a driving device. As shown in FIGS. Illumination 8 and CCD camera 9 are arranged opposite to each other at the upper and lower positions outside panel positioning table 5.

  7 and 8 show a specific structure of the liquid crystal panel positioning table 5. The support table 11 is placed on the upper surface of the support base 10, and the rail 12 and the slider 13 are used as appropriate in a plan view in the direction indicated by the arrow (Y direction). It is arranged so that it can be moved by a drive mechanism (not shown), and an elevating table 18 guided by a vertical rail 15 and a slider 16 and moved up and down by a cylinder 17 is attached to a support frame 14 erected on the support table 11 and moved up and down. A liquid crystal panel positioning table 5 that is slightly smaller than the liquid crystal panel A is attached to the upper surface of the table 18 by a rotation motor 19 so that the liquid crystal panel positioning table 5 can freely rotate (θ direction). The illumination 8 and the CCD camera 9 are arranged opposite to each other.

  The liquid crystal panel positioning table 5 is linearly moved in the Y direction while the liquid crystal panel A supplied to the upper surface is sucked and held, and the edge of the liquid crystal panel A is detected by the illumination 8 and the CCD camera 9. The liquid crystal panel A is positioned by rotating in the θ direction based on the position information.

  As shown in FIG. 1, the attachment table 1 for the polarizing plate B to the liquid crystal panel A is attached to the tip of a moving mechanism 22 that can be reciprocated by a suitable drive mechanism (not shown) and a slider 21 along a linear rail 20. As shown in FIG. 2, the liquid crystal panel A is sucked and held on the lower surface side thereof as shown in FIG. 2, and a standby position located above the liquid crystal panel positioning table 5 as shown in FIGS. The linearly reciprocating movement is performed directly above the table 7, and this movement passes over the liquid crystal panel cleaner mechanism 6 and the polarizing plate attaching position d.

  The liquid crystal panel positioning table 5 rises after the liquid crystal panel A is positioned, and when the sticking table 1 that stops at the standby position sucks the liquid crystal panel A, the liquid crystal panel A is lifted and returned to the lowered position. The liquid crystal panel A is transferred to 1.

  In the case of FIG. 5, the liquid crystal panel cleaner mechanism 6 employs an ultrasonic cleaner, and when the liquid crystal panel A adsorbed on the lower surface of the attaching table 1 passes directly above, In the above example, the liquid crystal panel A is removed by spraying and sucking, but other mechanisms such as brushing may be employed.

  At the polarizing plate attaching position d, the index table 2 for supplying the polarizing plate B to the attaching table 1 is horizontally attached to the rotating shaft 25 of the rotating motor 24 as shown in FIGS. A polarizing plate suction table 26 is provided on the upper surface of the tip of each arm projecting in four directions at equal intervals on the same circumference, and intermittently rotates to one side at an angle equal to the arrangement interval of the polarizing plate suction table 26. The stop position of each polarizing plate adsorption table 26 is set to a polarizing plate supply position f, a release sheet peeling position g, a polarizing plate positioning position h, and a polarizing plate attaching position d. And the polarizing plate attaching position d of the index table 2 coincide with each other.

  Note that, at the polarizing plate attaching position d shown in FIG. 5, the attaching table 1 that holds the liquid crystal panel A is supplied from the right to the left in the figure, and the polarizing plate suction table 26 that holds the polarizing plate B is the index table 2. With the rotation, the polarizing plate suction table 26 is supplied from the left to the right in the drawing. In consideration of consistency with the advancing direction of the affixing table 1, the polarization in FIG. The left side at the plate attachment position d will be described as the front end side of the polarizing plate suction table 26.

  As shown in FIG. 5, the polarizing plate suction table 26 is attached to a rotating shaft 27 supported on the index table 2 at a rear position with respect to the moving direction of the liquid crystal panel A, and the tip side rises from a horizontal state. Is possible.

  At the liquid crystal panel discharge position e, as shown in FIGS. 5 and 9, the liquid crystal panel A with the polarizing plate attached is transferred from the sticking table 1 to the liquid crystal panel discharge table 7, and the liquid crystal panel discharge table 7 is below it. The liquid crystal panel A is placed on the liquid crystal panel transport conveyor 28, and the liquid crystal panel A is transported to the subsequent liquid crystal panel transfer position a by the liquid crystal panel transport conveyor 28 as shown in FIG. The polarizing plate B is affixed on the other surface side by the same action as described above, and is sent to the next process from the liquid crystal panel discharge position e at the subsequent stage by the liquid crystal panel discharge conveyor 29.

  As shown in FIG. 3, the polarizing plate supply position f in the index table 2 that supplies the polarizing plate B to the pasting table 1 has a release sheet C on the outside of the polarizing plate suction table 26 that stops at this position f. The storage box 30 storing a large number of polarizing plates B with the upper side stacked, and the uppermost polarizing plate B in the storage box 30 are sucked and stopped at the polarizing plate supply position f. A transfer mechanism 31 for supplying the release sheet C with the release sheet C facing upward is disposed on the polarizing plate adsorption table 26.

  At the release sheet peeling position g, as shown in FIG. 2, the peeling unit 32 for the release sheet C is disposed at the upper position of the polarizing plate suction table 26 stopped at this position g.

  As shown in FIG. 4, the peeling unit 32 moves horizontally between the front and rear ends of the table 26 on the polarizing plate suction table 26 stopped at the release sheet peeling position g and can move up and down. A peeling roller 33 is disposed, and a peeling tape 35 wound around a peeling tape supply reel 34 provided at a rear position of the polarizing plate adsorption table 26 is mounted, and the drawn peeling tape 35 is attached to a guide roller 36 and a protective paper peeling roller 37. After being wound on the peeling roller 33 via the tape, the tape is wound around the peeling tape collecting reel 38. The peeling tape 35 between the peeling roller 33 and the protective paper peeling roller 37 has its adhesive surface facing downward due to the peeling of the protective paper. It has become.

  As shown in FIG. 4A, when the polarizing plate adsorption table 26 that has adsorbed the polarizing plate B stops at the release sheet peeling position g, the peeling roller 33 standing by at the leading end side rising position is lowered, and the peeling tape 35 is adhered. The surface is pressed against the tip of the release sheet C, and as shown in FIG. 4B, the release roller 33 moves backward, and the release tape collection reel 38 winds the release tape 35, whereby the release sheet C is polarized. When the release sheet 33 is peeled off from the plate B and attached to the release tape 35 and the release roller 33 reaches the rear side of the polarizer B, the release sheet C is automatically released from the polarizer B as shown in FIG. After that, the peeling tape 35 is fed out, and the peeling roller 33 returns to the tip side ascending position.

  The supply of the polarizing plate B to the polarizing plate adsorption table 26 corresponds to the step of attaching the polarizing plate B to the liquid crystal panel A, which is a later step, so that the polarizing plate B has a predetermined length from the tip of the polarizing plate adsorption table 26. Therefore, at the release sheet peeling position g, the front end of the polarizing plate is positioned at the lower end of the polarizing plate B at the front end of the polarizing plate suction table 26 stopped at this position g. When the release sheet C is peeled off by the peeling roller 33 and the peeling tape 35, the adsorbent 39 is moved up and down, and the polarizing plate tip end adsorbing body 39 rises to adsorb the tip protruding portion of the polarizing plate B to the adsorbing pad. 40, so that the release process of the release sheet C can be performed without hindrance.

  The polarizing plate positioning position h is not shown, but when the polarizing plate adsorption table 26 that has adsorbed the polarizing plate B stops at this position h, a guide pin or the like is pressed against the edge of the polarizing plate B to obtain a polarizing plate adsorption table. The polarizing plate B is positioned with respect to H.26.

  As shown in FIG. 2, the polarizing plate attaching position d of the attaching table 1 and the index table 2 is such that the polarizing plate adsorbing table 26 that adsorbs the polarizing plate B on the upper surface is located at the lower portion and the liquid crystal panel A is adsorbed on the lower surface. As shown in FIGS. 5 and 9, the pasting table 1 is vertically opposed so as to be located at the upper part, and the polarized light moves up and down to the lower position on the tip side of the polarizing plate B adsorbed by the polarizing plate adsorption table 26. A plate pasting roller 41 is disposed.

  As shown in FIG. 10, the polarizing plate pasting roller 41 is a roller support frame that can swing left and right with a swing shaft 45 as a fulcrum on the upper surface of a lifting plate 44 that moves up and down by a cylinder 42 and guides 43 on both sides. 46, and the roller support frame 46 rotatably supports the polarizing plate attaching roller 41, and both ends of the roller support frame 46 are provided by elastic buffer members 47 such as springs and rubber provided between the lifting plate 44. By supporting, the polarizing plate attaching roller 41 is in a horizontal state and an automatic alignment function for the polarizing plate B is added.

  The polarizing plate pasting roller 41 rises when the polarizing plate B is pasted, pushes up the tip of the polarizing plate B adsorbed and held on the polarizing plate suction table 26 with the adhesive surface facing upward, and FIG. As shown in b), the liquid crystal panel A in which the polarizing plate B and the polarizing plate suction table 26 are tilted upward with the rotation shaft 27 as a fulcrum and the tip of the polarizing plate B is sucked and held on the lower surface of the pasting table 1 as shown in FIG. In this pressed state, the polarizing plate suction table 26 releases the polarizing plate, and the sticking table 1 is moved to the liquid crystal panel discharge table 7 so that the polarizing plate B is liquid crystal. It moves integrally with the panel A and is attached to the lower surface. At this time, the polarizing plate attaching roller 41 follows the liquid crystal panel surface by automatic alignment.

  The release sheet peeling position g, the polarizing plate positioning position h, and the polarizing plate attaching position d set around the index table 2 are for dust prevention with respect to the polarizing plate B with the adhesive surface exposed on the upper surface. The upper part is covered with a dustproof cover 48.

  As shown in FIG. 11, the liquid crystal panel discharge table 7 is disposed at a position directly below the attachment table 1 that stops at the liquid crystal panel discharge position e, and a support arm 49 that moves up and down as appropriate by lifting means via a reversing motor 50. The liquid crystal panel discharge table 7 mounted at the standby position shown by the solid line in FIG. 11A is raised in a horizontal state, whereby the polarizing plate B of the liquid crystal panel A held on the lower surface of the attaching table 1. When the liquid crystal panel A is placed on the liquid crystal panel transport conveyor 28 as shown in FIG. 11B, the suction is released. As shown in FIG. 11 (c), it reverses upward and returns to the standby position.

  The polarizing plate affixing device to the liquid crystal panel of the present invention is configured as described above. Next, a polarizing plate affixing method to the liquid crystal panel using this device will be described.

  First, in the pasting apparatus, the liquid crystal panel A is transported when the liquid crystal panel A sent by the liquid crystal panel supply conveyor 3 stops just below the liquid crystal panel transfer table 4 as shown in FIG. After the transfer table 4 is lowered and sucks the liquid crystal panel A, the liquid crystal panel A is transferred onto the liquid crystal panel positioning table 5 by ascending, moving to the liquid crystal panel positioning position b, and descending.

  As shown in FIGS. 7 and 8, the liquid crystal panel positioning table 5 sucks and holds the liquid crystal panel A supplied to the upper surface, and the edge of the supported liquid crystal panel A is illuminated 8 by planar linear movement and rotation. Then, the positioning table 5 moves together with the support table 11 along the rail 12 from the solid line position of FIG. Then, based on the positional information of the edge of the liquid crystal panel A captured by the CCD camera 9 at that time, the rotation motor 19 is driven and rotated in the θ direction to determine the planar position of the liquid crystal panel A. Fine adjustment is performed, and the liquid crystal panel positioning table 5 moves backward in the Y direction to the original position.

  The affixing table 1 stands by at the liquid crystal panel positioning position b, and as shown in FIG. 5, the liquid crystal panel positioning table 5 is raised, the liquid crystal panel A after positioning is pressed against the affixing table 1, and the affixing table 1 is When the liquid crystal panel A is sucked, the liquid crystal panel positioning table 5 releases the suction and returns to the lowered position.

  As shown in FIG. 5, the affixing table 1 that holds the liquid crystal panel A on the lower surface sequentially moves to the liquid crystal panel cleaning position c and the polarizing plate affixing position d, and passes through the cleaning position c. The lower surface is cleaned and stops at the polarizing plate attaching position d.

  Next, as shown in FIG. 3, the supply of the polarizing plate B is performed in the polarizing plate storage box 30 taken out by the transfer mechanism 31 on the polarizing plate suction table 26 stopped at the polarizing plate supply position f of the index table 2. When the polarizing plate B is supplied so that the release sheet C is positioned on the upper surface and the index table 2 is rotated by one pitch, the polarizing plate adsorption table 26 that adsorbs the polarizing plate B is as shown in FIG. 4A to 4C, the release sheet C is peeled from the polarizing plate B sucked and held on the polarizing plate suction table 26 by the operation of the release sheet peeling unit 32 as shown in FIGS. The adhesive surface is exposed on the upper surface of the polarizing plate B.

  The polarizing plate adsorption table 26 that adsorbs the polarizing plate B from which the release sheet C has been peeled moves to the polarizing plate positioning position h by one pitch rotation of the index table 2, and positioning of the polarizing plate B with respect to the polarizing plate adsorption table 26. Next, the polarizing plate adsorption table 26 that adsorbs the polarizing plate B is moved to the polarizing plate attaching position d by rotating the index table 1 by one pitch, and the liquid crystal panel A is moved to the bottom surface as shown in FIG. Stops directly below the pasting table 1 that has been sucked and held.

  Thus, by adopting the index table 2 for the supply of the polarizing plate B, the supply of the polarizing plate B onto the polarizing plate adsorption table 26, the peeling of the release sheet C from the polarizing plate B, the polarizing plate B Positioning and sticking of the polarizing plate B at the polarizing plate attaching position d can be performed simultaneously in parallel, the time required for supplying the polarizing plate B can be shortened, and the efficiency of attaching can be improved.

  When the attaching table 1 and the polarizing plate suction table 26 are stopped at the polarizing plate attaching position d, the polarizing plate attaching roller 41 is lifted as shown in FIGS. 5 and 9, and the liquid crystal panel discharge position e of the attaching table 1 is reached. The polarizing plate B is affixed on the lower surface of the liquid crystal panel A.

  When the sticking table 1 stops at the liquid crystal panel discharge position e, as shown in FIG. 11, the liquid crystal panel discharge table 7 moves up and down and reverses to receive the liquid crystal panel A from the sticking table 1 and onto the conveyor 28. The liquid crystal panel A is supplied so that the polarizing plate B is positioned above.

  Thereafter, the liquid crystal panel A having the polarizing plate B attached to one surface side is sent to a subsequent attaching device, and the polarizing plate B is attached to the other surface side through the same steps as described above.

The top view which shows the whole structure of the polarizing plate sticking device to a liquid crystal panel FIG. 1 is a longitudinal front view showing a part of the arrow II in FIG. Fig. 1 is an enlarged front view of a part of the arrow II-II in Fig. 1. (A) thru | or (c) is operation | movement explanatory drawing of the release sheet peeling mechanism of a polarizing plate. Explanatory diagram of operation enlarging the portion of arrow III-III in FIG. (A) thru | or (d) are transfer operation explanatory drawing to the positioning position of a liquid crystal panel. Plan view showing the positioning position of the LCD panel Front view showing the positioning position of the LCD panel (A) and (b) are diagrams for explaining the attaching operation of the polarizing plate. Enlarged side view of polarizing plate pasting part (A) thru | or (c) is liquid crystal panel discharge operation explanatory drawing

Explanation of symbols

A liquid crystal panel B polarizing plate C release sheet a liquid crystal panel transfer position b liquid crystal panel positioning position c liquid crystal panel cleaning position d polarizing plate attachment position e liquid crystal panel discharge position f polarizing plate supply position g release sheet peeling position h polarization Plate positioning position 1 Sticking table 2 Index table 3 Liquid crystal panel supply conveyor 4 Liquid crystal panel transfer table 5 Liquid crystal panel positioning table 6 Liquid crystal panel cleaner mechanism 7 Liquid crystal panel discharge table 8 Illumination 9 CCD camera 10 Support base 11 Support table 12 Rail 13 Slider 14 Support frame 15 Vertical rail 16 Slider 17 Cylinder 18 Lifting table 19 Rotating motor 20 Linear rail 21 Slider 22 Moving mechanism 23 Ultrasonic air ejecting section 24 Rotating motor 25 Rotating shaft 26 Polarizing plate adsorption table 27 Rotating shaft 28 Liquid crystal panel transport conveyor 29 Liquid crystal panel discharge conveyor 30 Storage box 31 Transfer mechanism 32 Peeling unit 33 Peeling roller 34 Peeling tape supply reel 35 Peeling tape 36 Guide roller 37 Protective paper peeling roller 38 Peeling tape Collection reel 39 Polarizing plate tip adsorbing body 40 Adsorbing pad 41 Polarizing plate attaching roller 42 Cylinder 43 Guide 44 Elevating plate 45 Oscillating shaft 46 Roller support frame 47 Elastic buffer member 48 Dustproof cover 49 Support arm 50 Reverse motor

Claims (3)

By moving the sticking table that holds the liquid crystal panel on the lower surface side in a straight line, the liquid crystal panel is sequentially transferred to the liquid crystal panel positioning position, the polarizing plate attaching position, and the liquid crystal panel discharging position. An index table is used for supplying the polarizing plate to the plate, and each position of the index table is set to a polarizing plate supply position, a release sheet peeling position, a polarizing plate positioning position, and a polarizing plate attaching position. A method of attaching a polarizing plate to a liquid crystal panel, wherein the polarizing plate attaching position of the table is matched and the polarizing plate is attached to the liquid crystal panel at the polarizing plate attaching position. The sticking table that holds the LCD panel on the lower surface side is arranged so as to move linearly along the rail, and while the sticking table is moving, the LCD panel positioning position, polarizing plate attaching position, LCD panel discharge position A polarizing plate supply that uses an index table to supply the polarizing plate to the polarizing plate attaching position, and supplies the polarizing plate to the polarizing plate suction table for each position of the polarizing plate suction table provided on the index table. Set the position, the release sheet peeling position to peel the release sheet from the polarizing plate held by the polarizing plate adsorption table, the polarizing plate positioning position with respect to the polarizing plate adsorption table, and the polarizing plate attachment position, Same position for attaching the polarizing plate to the index table Is allowed, the polarizing plate applier to the liquid crystal panels by pasting roller to move up and down and placed on the polarizing plate pasting position to perform pasting a polarizing plate to the liquid crystal panel. 3. A polarizing plate affixing device to a liquid crystal panel according to claim 2, wherein the affixing roller is swingable to the left and right and both ends are supported by elastic buffer members, and has an automatic alignment structure capable of following the surface of the liquid crystal panel. .

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