JP5134496B2 - Work bonding machine - Google Patents

Description

  The present invention relates to a workpiece laminating apparatus for laminating a bonded body such as a polarizing film, a protective film, or a plate glass to a bonding target surrounded by a frame having a frame shape. The workpiece bonding apparatus of the present invention is used in the process of manufacturing a liquid crystal display, a plasma display, a touch panel, etc., for example.

  In the workpiece bonding apparatus of the present invention, a silk screen that can be ventilated is stretched on the upper opening surface of the vacuum chamber, and the bonded body indirectly supported via the silk screen is pressed upward with a roller to be bonded. Although it sticks, the basic structure of this kind of bonding apparatus is well-known in patent document 1. FIG. There, the antireflection film placed on the upper surface of the silk screen is sucked and held with vacuum pressure, and the cathode ray tube is supported on the left and right sides of the vacuum chamber with the antireflection film facing up and down, The anti-reflection film is pressed against the display surface of the cathode ray tube with a roller arranged on the inner surface of the screen to perform bonding.

  The work bonding apparatus according to the present invention can suitably bond a film to a bonding target in which the periphery of the bonding surface is surrounded by a frame-like frame body and there is a step between the surface of the frame body and the bonding surface. However, this kind of pasting object can be found in Patent Document 2, for example. There, an optical filter arranged in front of the plasma display is supported by a frame-shaped front frame. A protective film and a functional sheet are bonded to the outer surface of the optical filter as necessary.

JP-A-10-334807 (paragraph number 0039, FIG. 7) Japanese Patent Laying-Open No. 2007-206468 (paragraph number 0018, FIG. 2)

  As described above, when the periphery of the pasting surface to be pasted is surrounded by a frame-like frame, the frame protrudes from the pasting surface and becomes an obstacle, so the film is properly attached to the pasting surface. It becomes difficult to paste. In order to automatically perform such bonding work, the present inventor made a prototype of a bonding apparatus shown in FIG. There, the elastic foam 41 which can be ventilated is fixed to the upper surface of the silk screen 40, and the film 42 placed on the upper surface is bonded to the bonding surface 44 of the bonding object 43. The thickness dimension of the elastic foam 41 is set to be larger than the step dimension between the frame body 45 and the pasting surface 44, and the film 42 is pasted on the inner surface of the silk screen 40 via the elastic foam 41 with the roller 46. Press to 44 and bond.

  According to said bonding apparatus, it can eliminate that a frame interferes with bonding, and the film adsorbed on the upper surface can be suitably bonded to the bonding surface by pressing the elastic foam to the bonding surface with a roller. It should be. However, it is difficult to properly bond the film, and for example, it is inevitable that bonding failure occurs such as the film being displaced, wrinkling on the bonding surface, or local bubbles.

  Various changes were made to the elasticity and thickness of the elastic foam, the pressing force of the roller, etc. to eliminate the bonding failure, but a favorable result was not obtained. As a result of examining the cause, in a state where the elastic foam is pressed against the affixing surface, the elastic foam is also crushed in the traveling direction of the roller, and at that time, the film is obliquely pressed in the traveling direction of the roller and bent. I got the conviction that it was the cause. Incidentally, the film that failed to be bonded is not only peeled and discarded, but the cost associated with the disposal is a major obstacle to reducing the cost of the object to be bonded. In particular, functional films such as polarizing films and antireflection films, which are expensive, have high costs associated with poor bonding.

  This invention is proposed based on said knowledge, Comprising: The objective is the bonding of a film etc. suitably with respect to the bonding target in which the circumference | surroundings of the bonding surface are surrounded by the frame-like frame Then, it is providing the workpiece | work bonding apparatus which improves the yield of bonding object and can reduce the manufacturing cost of bonding object by that much.

  The workpiece | work bonding apparatus of this invention supports the 1st bonding stand 1 which supports the plate-shaped or film-shaped bonding body W1, and the bonding object W2 in the state which opposes through the bonding body W1 and the predetermined clearance E. FIG. The 2nd bonding stand 2 is provided. The bonding target W2 includes a bonding surface 5 to which the bonding body W1 is bonded and a frame-shaped frame body 6 surrounding the bonding surface 5, and a step between the surface of the frame 6 and the bonding surface 5 is provided. T2 is formed. The first bonding table 1 has a vacuum chamber 8 and a breathable silk screen 9 stretched on the opening surface of the vacuum chamber 8. On the outer surface of the silk screen 9, the mounting base 10 that supports the bonded body W1 is disposed. Inside the vacuum chamber 8, the roller 11 which presses the bonding body W1 to the bonding surface 5 through the silk screen 9 and the mounting base 10 is arrange | positioned. The mounting base 10 is configured by laminating a group of hard sheets 14 that can be ventilated and fixing the end surfaces of the laminated hard sheets 14 on the pressing start end side so as not to be separated. Thus, the bonding base W1 is bonded to the bonding surface 5 while following the roller 11 and locally bending and deforming the mounting base 10.

  The mounting base 10 can be configured to include an elastic sheet 15, and is configured by laminating one hard sheet 14 constituting the pressing surface 16 on the outer surface of the elastic sheet 15.

  The hard sheet 14 is formed of a metal sheet and / or a plastic sheet. The elastic sheet 15 is formed of either a urethane sheet or a silicon rubber sheet.

  A plurality of support bases 12 that support the mounting base 10 are arranged inside the silk screen 9. The support base 12 supports the support base 10 so that it can be displaced between a support position for supporting the mounting base 10 and a retracted position below the movement trajectory of the roller 11. Therefore, interlocking with the bonding movement of the roller 11, the plurality of support bases 12 are sequentially retreated to the retreat position, and the bonding body W <b> 1 is bonded to the bonding surface 5.

  In the present invention, the air-permeable mounting base 10 is disposed on the outer surface of the silk screen 9 covering the opening surface of the vacuum chamber 8, and the bonded body W1 is adsorbed and held by applying a vacuum pressure to the upper surface. Moreover, the bonding object W2 is supported by the 2nd bonding stand 2, the bonding surface 5 is made to oppose via the predetermined clearance gap E with respect to the bonding body W1, and the silk screen 9 and mounting base of this state 10 was pressed toward the bonding target W2 with the roller 11, and the bonding body W1 was bonded to the bonding surface 5 of the bonding target W2. Thus, when the bonding body W1 on the upper surface of the mounting base 10 is bonded to the bonding surface 5 while pressing the mounting base 10 with the roller 11, the periphery of the bonding surface 5 is surrounded by the frame 6 having a frame shape. Even if it is a case, the bonding body W1 can be reliably bonded with respect to the bonding surface 5 without being obstructed by the frame body 6.

  A group of hard sheets 14 that can be ventilated are stacked, and the end surface on the pressing start end side of the stacked hard sheets 14 is fixed so as not to be separated, so that the mounting base 10 is configured, so that the stacked hard sheets 14 are separated. The ease of movement of each hard sheet 14 can be ensured while preventing the above. Thereby, the difference of the curved shape of each hard sheet 14 when the mounting base 10 follows the roller 11 and locally curves and deforms can be smoothly absorbed by each hard sheet 14 being displaced.

  Therefore, according to the workpiece | work bonding apparatus of this invention, it pastes on the bonding surface 5 of the bonding target W2 provided with the frame-shaped frame body 6, following the roller 11 and making it bend and deform | transform smoothly smoothly. Bonding W1 can be properly bonded, and bonding object W2 is manufactured by cleaning out bonding defects such as bonding W1 being misaligned, wrinkling on the bonding surface, or locally producing bubbles. Time yield can be improved, and the manufacturing cost of the bonding object W2 can be reduced accordingly.

  In the mounting base 10 including the elastic sheet 15 in addition to the group of hard sheets 14, the hard sheet 14 constituting the pressing surface 16 is laminated on the outer surface of the elastic sheet 15. By providing the elastic sheet 16 on the inner side of the surface 16, the variation in the pressing force acting on the bonded body W1 can be absorbed by the elastic sheet 16 being elastically deformed. As a result, it is possible to improve the yield of the bonding object W2 by uniformly bonding the bonding body W1 to the bonding surface 5 in a state without bonding unevenness. Incidentally, the curved shape when the mounting base 10 follows the roller 11 is slightly different depending on which part of the mounting base 10 the roller 11 presses. Variations occur in the pressing force applied from 16 to the bonded body W1.

  The hard sheet 14 can be formed of a metal sheet or a plastic sheet. As the metal sheet, a stainless steel sheet, a steel alloy sheet, a copper alloy sheet or the like is suitable. According to these metal sheets, durability during long-term use can be improved, and the mobility of adjacent hard sheets 14 can be easily moved. Can be secured. Further, the hard sheet 14 can be formed of a plastic sheet having excellent lubricity, such as a fluororesin, a PET resin, or an ultra high molecular weight polyethylene. In that case, the hard sheets 14 are easily slipped between adjacent hard sheets 14. Thus, the deformation operation when the mounting base 10 follows the roller 11 and is locally bent and deformed can be further smoothed. According to the elastic sheet 15 formed of a urethane sheet or a silicon rubber sheet, it is possible to exhibit a stable elasticity over a long period of time and hardly deteriorate compared to other elastic materials. In addition, it is easy to obtain and costs less.

  When the mounting base 10 is supported by a plurality of support bases 12 provided inside the silk screen 9, the silk screen 9 is restricted from being bent and deformed by the weight and negative pressure of the mounting base 10, and bonded to the bonded body W1. The gap E with the surface 5 can always be constant. Therefore, the pressing operation of the mounting base 10 by the roller 11 can be made constant at all times, and the bonding body W1 can be appropriately bonded to the bonding surface 5 with no unevenness. Further, by moving the rollers 11 while retreating the plurality of support bases 12 sequentially to the retreat position, the mounting base 10 is supported by the support base 12 until just before being pasted, and the previous gap E is formed. It maintains in a proper state and can paste the bonding body W1 uniformly from one end to the other end.

(Example) FIG. 1 thru | or FIG. 4 shows the Example of the workpiece | work bonding apparatus which concerns on this invention. In FIG. 2, the workpiece bonding apparatus includes a first bonding table 1 that supports the bonding body W1 and a second bonding table 2 that supports the bonding object W2 in a state of facing the bonding body W1 and the predetermined gap E. And. The 2nd bonding stand 2 is connected with the 1st bonding stand 1 so that rocking | fluctuation opening / closing is possible, and is opened and closed by the air cylinder and motor which are not shown in figure.

  The bonded body W1 is made of a functional film such as an antistatic film or an antireflection film, or a transparent plate glass or plastic plate, and a transparent adhesive layer is formed on the entire surface thereof. The bonding target W2 includes a bonding surface 5 to which the bonding body W1 is bonded and a frame-shaped frame body 6 surrounding the bonding surface 5, and a step between the surface of the frame 6 and the bonding surface 5 is provided. T2 is formed. The outer shape of the past bonded body W1 is formed in the same square as the pasting surface 5. Specific examples of the bonding target W2 include a plasma display, a liquid crystal display, a touch panel, and the like, and these display surfaces serve as the bonding surface 5. Of course, devices other than the display may be the bonding target W2.

  The first bonding table 1 includes a box-shaped vacuum chamber 8 that opens upward, and a breathable silk screen 9 that is stretched over the opening surface of the vacuum chamber 8. On the outer surface of the silk screen 9, the mounting base 10 that supports the bonded body W1 is disposed. Further, inside the vacuum chamber 8, a roller 11 that presses the bonding body W <b> 1 against the bonding surface 5 through the silk screen 9 and the mounting base 10, and a pair of left and right support bases 12 that support the mounting base 10 are arranged. It is. In FIG. 2, reference numeral 13 denotes a vacuum pump (vacuum source) that exhausts air in the vacuum chamber 8. The screen surface of the silk screen 9 excluding the placement portion of the placement base 10 is sealed with a shielding sheet (not shown) so as not to allow ventilation.

  An attachment jig (not shown) is provided on the second bonding table 2, and the bonding object W2 can be fixed in a predetermined posture by a very simple operation.

  The mounting base 10 includes a group of hard sheets 14 that can be ventilated and an elastic sheet 15 as laminated elements. As shown in FIGS. 2 and 3, a base layer is formed of five hard sheets 14 out of six hard sheets 14, and an elastic sheet 15 is laminated on the outer surface thereof. Furthermore, the pressing surface 16 is configured by laminating one hard sheet 14 remaining on the outer surface of the elastic sheet 15, and the mounting base 10 is configured by fixing the end surfaces on the pressing start end side of these stacked bodies.

  The hard sheet 14 is made of a stainless steel sheet having a thickness of 0.05 to 0.2 mm, and the elastic sheet 15 is formed of a urethane sheet or a silicon rubber sheet having a thickness of 0.3 to 1.0 mm. A group of ventilation holes 17 and 18 are formed in the sheet surface of each hard sheet 14 and the sheet surface of the elastic sheet 15 in the same arrangement pattern, penetrating in the thickness direction. The diameter of the vent hole 17 is preferably selected from the range of 0.3 to 1.0 mm, more preferably from the range of 0.5 to 0.8 mm. If the diameter is less than 0.3 mm, the shape and size of the vent hole 17 are likely to vary, and the hole may be blocked by the entry of foreign matter such as dust. On the other hand, if the diameter exceeds 1.0 mm, the film surface may be sucked into the vent hole 17 of the uppermost hard sheet 14 by vacuum pressure and deformed when the film thickness of the bonded body W1 is small.

  The air holes 17 of the hard sheet 14 are accurately formed in a state where the diameter and the arrangement pattern are constant by etching the stainless steel sheet or drilling with a laser processing machine. Further, the vent hole 18 of the elastic sheet 15 is precisely formed in a state where the diameter and the arrangement pattern are constant by drilling with a laser processing machine. Therefore, in a state where all the hard sheets 14 and the elastic sheets 15 are laminated, all the vent holes 17 and 18 are communicated in the vertical direction, and the vacuum pressure in the vacuum chamber 8 is applied to the bonded body W1 placed on the pressing surface 16. Can act. The hard sheet 14 and the elastic sheet 15 in a laminated state are integrated so as not to be separated by laser welding the sheet end facing the pressing start end side of the mounting base 10 when the mounting base 10 is pressed by the roller 11. This fixed portion is denoted by reference numeral 19.

  The outer shape of the obtained mounting base 10 is the same quadrangle as the bonded body W <b> 1 and is large enough to enter and exit the frame body 6. Further, the total thickness T1 of the mounting base 10 is set slightly larger than the step T2 described above. In this embodiment, when the step T2 is 4 to 4.5 mm, the entire thickness of the mounting base 10 is set. The thickness dimension T1 was 5 mm.

  A positioning frame 32 is provided on the upper surface of the silk screen 9 in order to position the mounting base 10 in the front-rear and left-right directions. The positioning frame 32 receives and positions the left and right side surfaces and the front and rear side surfaces of the mounting base 10, and can move upward along with the mounting base 10 pushed up by the roller 11. For this purpose, the front and rear ends of the positioning frame 32 are guided and supported only at the upper end of the peripheral wall of the vacuum chamber 8 so as to move up and down.

  The roller 11 is rotatably supported by a roller bearing 21 provided inside the vacuum chamber 8. In addition, the air cylinder 22 provided between the roller bearing 21 and the roller support 20 is operated to move up and down to a standby position below the silk screen 9 and an upper pressing position that presses the mounting base 10 against the bonding target W2. It is configured so that it can.

  The roller support 20 is reciprocally driven by the drive structure and can reciprocate between the left end and the right end of the vacuum chamber 8. As shown in FIG. 2, the roller support base 20 is slidably guided and supported by the guide rail 23, and the roller support base 20 is fixed to the linear transition portion of the timing belt 24 arranged in parallel with the guide rail 23. Can be reciprocated left and right. The timing belt 24 is wound around a pair of left and right timing pulleys 25. One of the timing pulleys 25 is driven to rotate in both forward and reverse directions by a step motor 26, whereby the roller support 20 is reciprocated via the timing pulley 25. it can.

  The support 12 is made of a plate that can be ventilated, such as punching metal or a metal net, and is horizontally disposed on the lower surface side of the silk screen 9 and supported by an air cylinder 29. The support table 12 is moved up and down by an air cylinder 29, and the upper support position where the upper surface contacts the lower surface of the silk screen 9 and the retreat position where the support table 12 descends below the trajectory of the roller 11 are supported. Can be displaced.

  By supporting the mounting base 10 via the silk screen 9 with the left and right support bases 12, it is possible to prevent the silk screen 9 from being bent downward due to the weight and negative pressure of the mounting base 10. Thereby, the bonding body W1 mounted on the upper surface of the mounting base 10 can be directly opposed to the bonding surface 5 of the bonding target W2 via the appropriate gap E. In addition, when the roller 11 moves in the direction of the arrow M, the left and right support bases 12 are lowered to the retracted position in order from the side closer to the roller 11.

  The bonding apparatus comprised as mentioned above bonds the bonding body W1 to the bonding object W2 as follows. First, the 2nd bonding stand 2 is open-operated, and the bonding object W2 is mounted on the mounting jig provided on the bonding surface side. The film-like bonding body W1 is placed and positioned on the upper surface of the mounting base 10 whose upper surface is opened, and vacuum pressure is applied to the vacuum chamber 8 so that the bonding body W1 is adsorbed and fixed by the mounting base 10. Next, the 2nd bonding stand 2 is reversed, and as shown in FIG. 2, the bonding surface 5 of the bonding object W2 is made to oppose with the bonding body W1 and the predetermined gap E in between. The value of the gap E is preferably 0.1 to 3 mm. The second bonding table 2 in this state is received by a positioning table (not shown) and is locked and fixed so as not to be separated. The mounting base 10 is supported by a pair of left and right support bases 12.

  After the preparation for bonding is completed as described above, the roller 11 is moved to a position below the pressing start end of the mounting base 10, and the roller 11 is further moved upward to the pressing position by the air cylinder 22. 10 is pressed together with the silk screen 9 toward the bonding surface 5 of the bonding object W2. Thereby, the bonding body W1 vacuum-adsorbed on the upper surface of the mounting base 10 can be pressed and bonded to the bonding surface 5.

  As shown in FIG. 1, the mounting base 10 when being pushed up by the roller 11 is locally curved and deformed to partially press the bonding body W <b> 1 against the bonding surface 5. Thus, in order to follow the roller 11 and smoothly bend the mounting base 10 pressed by the roller 11, only the pressing start ends of the six laminated hard sheets 14 and the elastic sheet 15 are fixed by the weld layer. Thus, each sheet can be freely moved relative to each other. In other words, the shape change when each sheet is curved can be smoothly absorbed by each sheet being displaced. Incidentally, in the case where the pressing start end and the pressing end of the mounting base 10 or the four peripheral portions are fixed, each sheet is restrained by the fixed portion and cannot be moved relatively. It cannot follow and bend smoothly.

  The mounting base 10 is provided with an elastic sheet 15 between the base layer and the uppermost hard sheet 14 for the following reason. The curved shape when the mounting base 10 is deformed following the roller 11 slightly differs depending on which part of the mounting base 10 the roller 11 is pressing. For example, the curved shape of the mounting base 10 is different between the left and right ends and the central portion, and variation occurs in the pressing force when the bonded body W1 is pressed by the pressing surface 16 due to this shape change. However, if the elastic sheet 16 is provided on the lower surface side of the pressing surface 16, the variation in the pressing force acting on the bonded body W1 can be absorbed by the elastic sheet 16 being elastically deformed, and thus the bonded body W1 is unevenly bonded. Can be bonded evenly in the absence.

  The roller 11 is operated to move at a constant speed from the left end to the right end of the bonded body W <b> 1 in FIG. 4, and the left and right support bases 12 are sequentially lowered as the roller 11 moves. First, when the roller 11 pushes up the pressing start end of the mounting base 10, the left support base 12 close to the roller 11 is moved down by the air cylinder 29 and moved from the movement space of the roller 11 to the retracted position. . Prior to the roller 11 reaching the center of the mounting base 10, the right support 12 is moved down by the air cylinder 29 and moved from the movement space of the roller 11 to the retracted position. After the bonding is completed, the roller 11 returns to the home position shown in FIG. 2, and the left and right support bases 12 return to the support position to support the mounting base 10. Finally, the 2nd bonding stand 2 is opened and rocked, and the bonding object W2 is taken out.

  In said Example, although the case where the bonding body W1 was a film was demonstrated, also when the bonding body W1 is a glass substrate or a plastic substrate, the bonding body W1 is appropriately appropriate with respect to the bonding object W2. Moreover, it can be quickly bonded. The 2nd bonding stand 2 can be rock | fluctuated and opened around the vertical rocking | fluctuation axis | shaft, and can face the bonding body W1.

  The hard sheet 14 can be formed of a plastic sheet, for example, a plastic sheet excellent in lubricity, such as a fluororesin, a PET resin, or an ultra high molecular polyethylene. In that case, the fixing part 19 can be formed by applying an adhesive to the sheet end face facing the pressing start end side of the mounting base 10, and the vent hole 17 may be formed by an NC processing machine. In addition to the stainless steel sheet, the hard sheet 14 can be formed of a metal sheet such as a steel alloy sheet or a copper alloy sheet, and any metal sheet having particularly excellent lubricity can be suitably used. Note that the number of the hard sheets 14 constituting the base layer should be appropriately changed according to the dimension of the step T2, and the number is not limited to the number described in the embodiment.

  In a state where the bonding surface 5 of the bonding object W2 is directly facing the bonding body W1 with the predetermined gap E in between, the first bonding table 1 or the bonding body W1 is used as a position reference, and the second bonding table 2 is used. Can be positioned by adjusting with an alignment device. Although it is preferable that the mounting base 10 includes the elastic sheet 15, the elastic sheet 15 can be omitted depending on the material of the bonded body W1. Two or more support bases 12 can be provided as necessary. Further, when the weight of the mounting base 10 is supported by the peripheral wall 3 of the vacuum chamber 8, the support base 12 can be omitted.

It is a vertical front view of only the principal part which shows the detail of the bonding structure. It is a vertical front view of a workpiece bonding apparatus. It is a perspective view of a mounting base. It is a vertical front view of the workpiece | work bonding apparatus of the state in the middle of bonding. It is a vertical front view of the workpiece bonding structure which shows a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st bonding stand 2 2nd bonding stand 5 Pasting surface 6 Frame 8 Vacuum chamber 9 Silk screen 10 Mounting base 11 Roller 14 Hard sheet 15 Elastic sheet W1 Pasting body W2 Pasting object T2 Level difference

Claims (4)

The first bonding stand (1) that supports the plate-like or film-like bonding body (W1) and the bonding target (W2) are supported in a state of facing the bonding body (W1) via the predetermined gap (E). A second bonding table (2)
The pasting object (W2) includes a pasting surface (5) to which the pasting body (W1) is pasted and a frame-like frame body (6) surrounding the pasting surface (5). ) Is formed between the surface and the pasting surface (5),
The first bonding stand (1) has a vacuum chamber (8) and a breathable silk screen (9) stretched on the opening surface of the vacuum chamber (8),
On the outer surface of the silk screen (9), a mounting base (10) for supporting the bonded body (W1) is disposed,
Inside the vacuum chamber (8), a roller (11) for pressing the bonding body (W1) against the bonding surface (5) via the silk screen (9) and the mounting base (10) is disposed.
The mounting base (10) is configured by laminating a group of hard sheets (14) that can be ventilated, and fixing the end face on the pressing start end side of the laminated hard sheets (14) in an inseparable manner,
The workpiece bonding apparatus, wherein the mounting base (10) follows the roller (11) and bonds the bonding body (W1) to the bonding surface (5) while locally bending and deforming. The mounting base (10) includes an elastic sheet (15),
The work bonding apparatus according to claim 1, wherein one hard sheet (14) constituting the pressing surface (16) is laminated on the outer surface of the elastic sheet (15).   The workpiece bonding according to claim 2, wherein the hard sheet (14) is formed of a metal sheet and / or a plastic sheet, and the elastic sheet (15) is formed of either a urethane sheet or a silicon rubber sheet. apparatus. A plurality of support bases (12) for supporting the mounting base (10) are arranged inside the silk screen (9),
The support base (12) is supported so as to be displaceable between a support position for supporting the mounting base (10) and a retracted position below the movement locus of the roller (11).
In conjunction with the movement of the roller (11), the plurality of support tables (12) are sequentially moved to the retracted position, and the bonded body (W1) is bonded to the bonding surface (5). Or the workpiece bonding apparatus of 3.

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