JP2015039862A - Lamination apparatus and lamination method for laminating work in bent state - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamination apparatus which is for laminating workpieces in a bent state, substantially improves the efficiency percentage of laminated products by laminating a pair of workpieces always appropriately and allows reduction of production costs of the laminated products by the improvement.SOLUTION: A lamination apparatus includes an upper adsorption base 4 which holds a first workpiece W1 in a bent state by adsorption and a plurality of lower adsorption bases 5 which hold a second workpiece W2 in a bent state by adsorption. In a lower adsorption disk 2, there are provided an adsorption base lifting structure which elevates and lowers the individual lower adsorption bases 5 between an adsorption position and a retreat position, a lamination roller 6 which presses the second workpiece W2 onto the first workpiece W1, a roller lifting structure and a roller moving structure. When both workpieces W1 and W2 are laminated together, the individual adsorption bases 5 are switched, in order, to the retreat position by the adsorption base lifting structure before the lamination roller 6 moves from a lamination starting end to a lamination completion end. The lamination roller 6 in a lamination state is elevated and lowered along the bent shape of the first workpiece W1 by the roller lifting structure so as to laminate the first workpiece W1 and the second workpiece W2 together under uniform lamination force.

Description

  The present invention relates to a laminating apparatus and a laminating method for laminating workpieces such as plate glass and functional sheets in a curved shape, for example.

  This type of bonding apparatus is disclosed in Patent Document 1, for example. In this case, the substrate holder is held in a state in which the first substrate (work) is sucked and held by a stage having a concave curved substrate holding curved surface, and the bonding start end of the second substrate (work) is positioned with respect to the first substrate. The whole of the flat second substrate is supported diagonally by a suspension member fixed at the end of bonding. A liquid crystal material is disposed between the two substrates. By pressing the upper surface of the second substrate toward the substrate holding curved surface with a heating and pressing roller, the liquid crystal material is spread while suppressing the mixing of bubbles. The substrates are temporarily bonded in a curved shape. Finally, the curved panel placed on the holder is housed in an oven, and the curved panel is heated to a predetermined temperature and bonded together. The suspension member is gradually extended as the bonding of the second substrate proceeds to gradually reduce the inclination angle of the second substrate.

  A similar laminating apparatus is also disclosed in Patent Document 2, in which a flat liquid crystal that holds a polarizing plate (work) on the upper surface of a projecting curved stage and is placed on the upper surface of one end of the polarizing plate. The panel (work) is pressed against the stage with a panel sticking roller, the liquid crystal panel is bonded to the polarizing plate, and both are bonded in a curved shape. Furthermore, a polarizing plate sticking roller around which another polarizing plate is wound is pressed against the upper surface of the liquid crystal panel, the polarizing plate is adhered to the liquid crystal panel, and both are bonded in a curved shape.

  In the bonding apparatus of the present invention, each of the pair of workpieces is sucked and held through an appropriate bonding gap, and the suction holding state of the lower workpiece is released prior to the bonding movement of the bonding roller. However, although the lower workpiece is bonded to the upper workpiece with a bonding roller, this type of bonding technique is known in Patent Document 3 according to the proposal of the present applicant. However, the bonding apparatus of Patent Document 3 only bonds a pair of flat workpieces held by suction and obtains a flat bonded product, and does not bond the pair of workpieces in a curved shape. Absent. A similar bonding apparatus is also disclosed in Patent Document 4 according to the proposal of the present applicant.

JP 2002-014359 A (paragraph numbers 0081 to 0104, FIG. 1) JP 2009-237278 A (paragraph numbers 0009 to 0015, FIG. 2) Japanese Patent No. 4870046 (paragraph numbers 0018 to 0032, FIG. 10) International Publication No. 2012/172003

  In the bonding apparatus of patent document 1 and patent document 2, a flat work is pressed against the stage side with a bonding roller in a state where one work is adsorbed and held in a curved shape by a stage, and a pair of works are bonded together. To do. Thus, when bonding is performed in a state where only one of the workpieces is adsorbed and held in a curved shape, the latter workpiece pressed by the bonding roller meanders in the middle of the bonding, or shifts in the central axis direction of the bonding roller. Since it is easy to move, it becomes difficult to paste a pair of workpieces accurately. Moreover, when the latter workpiece is a sheet or a film, it is easy to generate wrinkles in the latter workpiece by pressing the bonding roller, or the bonding end edges of the pair of workpieces at the end of bonding are displaced. The defect rate becomes high.

  In the bonding apparatus of Patent Document 2, since the holding surface of the stage that sucks and holds the workpiece is formed with a protruding surface, it is difficult to make the pressing force of the bonding roller moving along the protruding surface constant, Therefore, it cannot bond, always providing equal bonding force to a pair of work. In that respect, in the bonding apparatus of Patent Document 1, since the bonding roller is moved along an arc trajectory around the center of curvature of the substrate holding curved surface, a substantially uniform bonding force can be applied to the pair of workpieces. However, when the substrate holding curved surface is formed in a non-arc shape (curved shape), the pressing force of the bonding roller varies depending on the bonding site. Thus, when there is variation in the bonding force of a pair of workpieces, there is a risk of causing a fatal product failure such that one workpiece floats away from the bonding surface during long-term use or the curved shape is locally distorted.

The purpose of the present invention is to bond a pair of workpieces in a state of being adsorbed and held in a curved shape, so that both workpieces can always be properly bonded to greatly improve the non-defective product rate. It is in providing the bonding apparatus which bonds the workpiece | work in the curved shape, and the bonding method which can reduce the production cost of the bonding goods.
The purpose of the present invention is to make the bonding force of a pair of workpieces uniform over the entire surface, and to keep the curved shape of the bonded product in an appropriate state over a long period of time. It is in providing the bonding method.
The object of the present invention is not only to bond a pair of workpieces in an arc shape, but also to bond a pair of workpieces with an equal bonding force even when both workpieces are bonded in a non-arc shape. The object is to provide a bonding apparatus and a bonding method for bonding a workpiece in a curved shape, which can be bonded in a curved shape.

  The bonding apparatus according to the present invention includes an upper suction disk 1 including an upper suction table 4 that sucks and holds the first work W1 in a curved shape, and a plurality of lower suction tables 5 that suck and hold the second work W2 in a curved shape. And a lower suction disk 2 provided with The lower suction disk 2 includes a lower suction table 5 between a suction position where the second work W2 is sucked and a retreat position where the lower work stand 2 is separated from the second work W2 and retreats outside the transition locus of the bonding roller 6. A suction stand lifting structure for lifting and lowering is provided. Furthermore, on the lower suction disk 2, a laminating roller 6 that presses and bonds the second work W2 to the first work W1, and a roller elevating structure that moves the laminating roller 6 up and down between a standby position and a pressing position. And the roller movement structure which moves the bonding roller 6 between the bonding start end and bonding end of both the workpiece | work W1 * W2 is provided. At the time of bonding of both the workpieces W1 and W2, prior to the bonding roller 6 moving from the bonding start end to the bonding end, each lower suction stand 5 is moved from the suction position to the retracted position by the suction stand lifting structure. While sequentially switching, both workpieces W1 and W2 are bonded together. The first workpiece W1 and the second workpiece W2 are bonded with a uniform bonding force while the bonding roller 6 in the bonding state is moved up and down along the curved shape of the first workpiece W1 with a roller lifting structure. The curved shape in the present invention is a concept including both an arc surface and a curved surface.

  At least one of the first workpiece W1 and the second workpiece W2 is formed in a curved shape in advance.

  The lower suction surface 15 of each lower suction platform 5 is formed in a partially curved shape corresponding to the curved shape of the opposing first workpiece W1.

  A buffer 32 is disposed between the laminating roller 6 and the roller lifting structure. In the bonding state, the workpieces W1 and W2 are bonded with a uniform bonding force while absorbing the variation in the height position of the bonding roller 6 with the buffer body 32.

  A silk screen 8 that supports the second workpiece W2 is stretched on the upper surface of the lower suction disk 2, and a plurality of lower suction tables 5 and bonding rollers 6 are disposed on the lower surface side thereof. In a state where the second work W2 is sucked and held in a curved shape via the silk screen 8 by the plurality of lower suction tables 5, the second work W2 is pressed against the first work W1 by the laminating roller 6, and both the works W1 and W2 are pressed. Paste.

  Both the workpieces are adjusted by adjusting the upper suction platform 4 according to the output signal from the displacement detection device 40 and the displacement detection device 40, which optically detects the positional displacement of the pair of workpieces W1 and W2. An alignment table 3 for positioning W1 and W2 is provided. The workpieces W1 and W2 are positioned in a state where the pair of workpieces W1 and W2 are sucked and held in a curved shape.

  Among the plurality of lower suction tables 5, a bonding roller 6 is interposed between the first suction table 5a that supports the bonding start end of the second workpiece W2 and the second suction table 5b adjacent to the first suction table 5a. A roller raising / lowering space S that allows the elevator to move up and down between the standby position and the pressing position is provided. In the roller lifting / lowering space S, the bonding roller 6 is displaced from the standby position to the pressing position, and the position near the bonding start end of the second workpiece W2 is temporarily bonded to the first workpiece W1. Continuously to the temporary bonding, the bonding roller 6 is moved to the bonding start end side in a state where the first suction stand 5a is displaced to the retracted position, and the first workpiece W1 and the second workpiece W2 are primary bonded. To do. In succession to the primary bonding, the entire surface of the first workpiece W1 and the second workpiece W2 is secondarily bonded by moving the bonding roller 6 from the bonding start end to the bonding end.

  In the bonding method according to the present invention, the first workpiece W1 is held in a curved shape by the upper suction table 4 and the second workpiece W2 is held in a curved shape by the plurality of lower suction tables 5 provided on the lower suction plate 2. And the upper suction disk 1 and the plurality of lower suction tables 5 are vertically opposed so that the facing distance E between the curved surfaces of the first workpiece W1 and the second workpiece W2 is made constant along the curved surface. In the state where the step of holding and the laminating roller 6 provided on the side of the lower suction board 2 are raised from the standby position to the pressing position, the laminating roller 6 is moved from the laminating start end side to the laminating end, A step of bonding the second workpiece W2 to the first workpiece W1 while retracting each lower suction platform 5 from the suction position to the retracted position prior to the movement of the combining roller 6. In the process of bonding the second workpiece W2 to the first workpiece W1, the bonding roller 6 is moved up and down along the curved shape of the first workpiece W1 to make the second workpiece W2 uniform with respect to the first workpiece W1. It is characterized by pasting with pressing force.

  At least one of the first workpiece W1 before being sucked and held by the upper suction table 4 and the second work W2 before being sucked and held by the lower suction table 5 is formed in a curved shape in advance.

  In the process of bonding the second workpiece W2 to the first workpiece W1, while absorbing the variation in the height position of the bonding roller 6 that presses the second workpiece W2 with the buffer 32, both the workpieces W1 and W2 are made uniform. Bonding with pressing force.

  In the step of bonding the second workpiece W2 to the first workpiece W1, the bonding roller 6 is displaced to the pressing position at a position near the bonding start end, and the position near the bonding start end of the second workpiece W2 is set to the first position. Temporarily pasting to the workpiece W1 and continuing to the temporary pasting, the pasting roller 6 is moved to the pasting start end side, and the pasting start end portion of the first workpiece W1 and the second workpiece W2 is primary pasted. Continuously to the primary bonding, the entire surface of the first workpiece W1 and the second workpiece W2 is secondarily bonded by moving the bonding roller 6 from the bonding start end to the bonding end.

  In the bonding apparatus according to the present invention, the first work W1 and the second work W2 are sucked and held in a curved shape by the upper suction table 4 and the lower suction table 5, respectively, and the second work W2 is held by the bonding roller 6 as the first work. The workpieces W1 and W2 were bonded by pressing against W1. Moreover, at the time of bonding of both the workpieces W1 and W2, the second suction table 5 is sequentially switched to the retracted position prior to the movement of the bonding roller 6 until the two workpieces W1 and W2 are bonded. The curved shape of the workpiece W2 can be held by each lower suction stand 5. In this way, when the pair of workpieces W1 and W2 are bonded and held in a curved shape, both the workpieces W1 and W2 can always be properly bonded, so the yield rate of bonded products is greatly improved. The production cost of the bonded product can be reduced accordingly.

  Furthermore, in the bonding state, since the bonding roller 6 is moved up and down along the curved shape of the first workpiece W1 with a roller lifting structure, both the workpieces W1 and W2 can be bonded with a uniform bonding force. Therefore, not only when a pair of workpieces W1 and W2 are bonded in an arc shape, but also when both workpieces W1 and W2 are bonded in a non-arc shape, both workpieces W1 and W2 are evenly bonded. It can be bonded to an appropriate curved shape with a resultant force.

  When at least one of the first workpiece W1 and the second workpiece W2 is formed in a curved shape in advance, the curved shape of the bonded product can be appropriately held by the shape retaining force of the workpiece formed in the curved shape. Moreover, since the workpiece | work formed in advance in the curved shape does not produce a deformation stress by bonding both the workpieces W1 and W2, the curved shape of the bonded product can be kept in an appropriate state for a long time. it can. Specifically, it is possible to eliminate the occurrence of product defects such as one of the workpieces floating away from the bonding surface during long-term use, or the curved shape being locally distorted.

  If the lower suction surface 15 of each lower suction platform 5 is formed in a partially curved shape corresponding to the curved shape of the first workpiece W1, the second workpiece W2 until just before the workpieces W1 and W2 are bonded together. Can be held in an appropriate curved shape by each lower suction stand 5. Therefore, both work W1 * W2 can be bonded more appropriately, and the quality rate of a bonded product can be improved further.

  The roller raising / lowering structure which raises / lowers the bonding roller 6 controls the rotation angle of the motor used as a drive source by numerical control, and adjusts the height position of the bonding roller 6, for example. However, since there is a limit to the controllable minimum movement amount of the motor and the mechanism that transmits power to the laminating roller 6 with its power converted, there is a slight variation in the height position of the laminating roller 6. End up. In order to absorb the variation in the height position of the bonding roller 6 and make the pressing force of the bonding roller 6 uniform, the buffer body 32 is arranged between the bonding roller 6 and the roller lifting structure. . The buffer 32 is made of, for example, a commercially available shock absorber. When the bonding roller 6 presses the second workpiece W2 while moving up and down following the change in the curved surface of the first workpiece W1, the height position of the bonding roller 6 is increased. The roller base 25 is lifted and lowered slightly in response to the variation of. Thus, by absorbing the variation in the height position of the bonding roller 6 with the buffer 32, the pressing force of the bonding roller 6 can be made uniform and the variation can be complemented.

  When the silk screen 8 is stretched on the upper surface of the lower suction board 2 and the second workpiece W2 is suctioned and held in a curved shape via the silk screen 8 by the plurality of lower suction tables 5, the second workpiece W2 has a self-retaining property. Even if it is not provided, the second workpiece W2 can be sucked and held in an appropriate curved shape. Moreover, in the adjacent part of the lower adsorption | suction stand 5, it can support the 2nd workpiece | work W2 with the silk screen 8 and hold | maintain the curved shape appropriately until just before both workpiece | work W1 * W2 is bonded.

  When the upper suction disk 1 is provided with the displacement detection device 40 and the alignment table 3 and the upper suction stand 4 is adjusted according to the output signal from the displacement detection device 40, the positioning of the pair of workpieces W1 and W2 suctioned and held in a curved shape is performed. Can be performed with high accuracy. Therefore, both the workpieces W1 and W2 are always properly bonded to further improve the yield rate of the bonded product, thereby improving the yield of the bonded product and reducing the production cost.

  In the roller lifting / lowering space S, after temporarily bonding the position near the bonding start end of the second workpiece W2 to the first workpiece W1 with the bonding roller 6, the bonding roller 6 is moved to the bonding start end side to move both workpieces W1. -When W2 is primarily bonded, the bonding start ends of both workpieces W1 and W2 can be properly bonded without any positional deviation. This is because when the second workpiece W2 is temporarily bonded, the bonding start end of the second workpiece W2 is displaced by the bonding roller 6 by adsorbing and holding the bonding start end with the first suction stand 5a. This is because, by performing primary bonding continuously to temporary bonding, bonding can be performed in a state where the bonding start ends of both the workpieces W1 and W2 are properly positioned. Therefore, by continuously bonding the entire surfaces of both the workpieces W1 and W2 in succession to the primary bonding, both the workpieces W1 and W2 can be bonded accurately along a preset curved shape.

  In the bonding method according to the present invention, the step of holding the first workpiece W1 and the second workpiece W2 in a curved shape by the upper suction table 4 and the lower suction table 5 and the facing distance E between the workpieces W1 and W2 are curved. Both the workpieces W1 and W2 were bonded together through a step of holding them along the surface and a bonding step of pressing the second workpiece W2 against the first workpiece W1 with the bonding roller 6. Moreover, in the process of bonding both the workpieces W1 and W2, the bonding roller 6 is moved up and down along the curved shape of the first workpiece W1. Thus, in the process of bonding both the workpieces W1 and W2, when the bonding roller 6 is operated up and down along the curved shape of the first workpiece W1, the second workpiece W2 is pressed evenly against the first workpiece W1. Bonding can be performed with pressure, and the pressing force applied to the second workpiece W2 can be prevented from varying depending on the bonding position. Therefore, not only when a pair of workpieces W1 and W2 are bonded in an arc shape, but also when both workpieces W1 and W2 are bonded in a non-arc shape, both workpieces W1 and W2 are evenly bonded. It can be bonded to an appropriate curved shape with a resultant force.

  When at least one of the first workpiece W1 and the second workpiece W2 is formed in a curved shape in advance, the curved shape of the bonded product can be appropriately held by the shape retaining force of the workpiece formed in the curved shape. Moreover, since the workpiece | work formed in advance in the curved shape does not produce a deformation stress by bonding both the workpieces W1 and W2, the curved shape of the bonded product can be kept in an appropriate state for a long time. it can. Specifically, it is possible to eliminate the occurrence of product defects such as one of the workpieces floating away from the bonding surface during long-term use, or the curved shape being locally distorted.

  In the process of bonding both the workpieces W1 and W2, when the bonding is performed while absorbing the variation in the height position of the bonding roller 6 with the buffer body 32, the pressing force of the second workpiece W2 by the bonding roller 6 is uniform. Can be This is because the buffer 32 can be lifted and lowered slightly to absorb and compensate for variations in the height position of the bonding roller 6. In addition, the reason why slight variation occurs in the height position of the bonding roller 6 is as described above.

  In the step of bonding both the workpieces W1 and W2, after temporarily bonding the position near the bonding start end of the second workpiece W2 to the first workpiece W1, the bonding roller 6 is moved to the bonding start end side to move both workpieces. When W1 and W2 are primarily bonded, the bonding start ends of both workpieces W1 and W2 can be appropriately bonded without any positional deviation. This is because when the second workpiece W2 is temporarily bonded, the bonding start end of the second workpiece W2 is displaced by the bonding roller 6 by adsorbing and holding the bonding start end with the first suction stand 5a. This is because, by performing primary bonding continuously to temporary bonding, bonding can be performed in a state where the bonding start ends of both the workpieces W1 and W2 are properly positioned. Therefore, by continuously bonding the entire surfaces of both the workpieces W1 and W2 in succession to the primary bonding, both the workpieces W1 and W2 can be bonded accurately along a preset curved shape.

It is a vertical front view which shows the schematic structure of the bonding apparatus which concerns on this invention. It is a side view which shows the outline of a suction stand raising / lowering structure. It is a side view which shows the outline of a roller raising / lowering structure. It is a vertical front view which shows the usage condition of the bonding apparatus which concerns on this invention. It is explanatory drawing which shows the bonding procedure of the bonding apparatus which concerns on this invention. It is a vertical front view which shows schematic structure of the bonding apparatus which concerns on another Example of this invention. It is explanatory drawing which shows the bonding procedure of the bonding apparatus which concerns on another Example of this invention.

(Example) FIG. 1 thru | or FIG. 5 has shown the Example of the workpiece | work bonding apparatus which concerns on this invention. In the present invention, front / rear, left / right, and upper / lower follow the cross arrows shown in FIGS. 1 and 3 and the front / rear, left / right, and upper / lower indications shown near each arrow.

  In FIG. 1, the workpiece bonding apparatus includes an upper upper suction disk 1 and a lower lower suction disk 2, an alignment table 3 is provided on the inner surface of the upper suction disk 1, and the first workpiece is disposed on the lower surface thereof. An upper suction stand 4 for sucking and holding W1 is provided. The lower suction board 2 is provided with seven lower suction tables 5, a bonding roller 6, an adsorption table raising / lowering structure for operating both 5 and 6, a roller raising / lowering structure, a roller moving structure, and the like.

  A silk screen 8 is stretched on the upper surface of the lower suction disk 2, and the lower suction table 5 and the bonding roller 6 are disposed on the lower surface side. A roller lifting space S is secured between the first suction stand 5a that supports the bonding start end of the second workpiece W2 and the second suction stand 5b adjacent to the first suction stand 5a. The laminating roller 6 is arranged. The second workpiece W2 is placed on the upper surface of the silk screen 8, and is sucked and held by the lower suction stand 5 via the silk screen 8.

  The upper suction plate 1 is supported so as to be swingable and openable about the hinge shaft 9 with respect to the lower suction plate 2 and can be automatically opened and closed by an operation cylinder (not shown). As shown in FIG. 1, in a state where the upper suction plate 1 is closed and swung and attached to the upper surface of the lower suction plate 2, the upper suction table 4 and the lower suction table 5 face each other vertically. The first workpiece W1 in this embodiment is made of a glass substrate such as a liquid crystal substrate or a plasma display substrate, and is curved in advance in a partial arc shape in a state that matches the curved shape of the upper workpiece suction surface 12 described later. The second workpiece W2 is made of a flat functional sheet such as a polarizing sheet or an antireflection film, and a transparent adhesive is applied to the bonding surface (upper surface side) with the first workpiece W1.

  A curved concave upper work suction surface 12 is formed on the lower surface of the upper suction stand 4, and a group of suction openings 14 communicating with the vacuum chamber 13 is formed over the entire surface. The upper workpiece suction surface 12 is formed so that the depth of the recess is maximized at the left and right central portions. As shown in FIG. 4, the first work W <b> 1 is positioned with respect to the upper work suction surface 12 in a state where the upper suction stand 4 is in the horizontal open posture, and a vacuum pressure is applied to the vacuum chamber 13 in this state. Thus, the first workpiece W1 can be brought into close contact with the upper workpiece suction surface 12 and suctioned and fixed in a concave curved surface shape. The vacuum chamber 13 of the upper adsorption table 4 is connected to a vacuum source (not shown) through a passage and an electromagnetic valve.

  As shown in FIG. 2, the lower suction stand 5 is formed in a hollow box shape that is long in the front and rear, and a lower suction surface 15 is formed in a partially curved shape on the upper surface of each lower suction stand 5. The lower suction surface 15 forms a lower workpiece suction surface 16 having the same curved shape as the upper workpiece suction surface 12. The lower workpiece suction surface 16 formed in a protruding curved surface shape is formed so that the protruding height is maximized at the left and right central portions. In this embodiment, the upper workpiece suction surface 12 and the lower workpiece suction surface 16 are each formed in a partial arc shape. Therefore, the lower suction surface 15 is formed in a partial arc shape and protrudes from the silk screen 8. Supports a curved surface. A group of suction openings 18 communicating with the vacuum chamber 17 inside the lower suction table 5 is formed on the lower suction surface 15. The second workpiece W2 is positioned with respect to the lower workpiece suction surface 16, and a vacuum pressure is applied to the vacuum chamber 17 in this state, whereby the second workpiece W2 is brought into close contact with the lower workpiece suction surface 16 to form a protruding curved surface. It can be adsorbed and fixed to. The vacuum chamber 17 of the lower adsorption table 5 is connected to a vacuum source (not shown) through a passage and an electromagnetic valve.

  In FIG. 2, the suction table elevating structure includes an elevating shaft 19 fixed to the front and back of the lower surface of the lower adsorption table 5, a guide tube 20 that guides and supports the elevating shaft 19 slidably up and down, It is provided in the front-rear center and is configured by an elevating structure for elevating and operating the individual lower suction table 5. The lifting structure includes a pinion 21 and a rack 22, a motor 23 that rotationally drives the pinion 21, and the like. By driving the elevating structure motor 23 in the normal direction or in the reverse direction, each lower suction stand 5 is separated from the upper suction position where the second work W2 is sucked and the second work W2 to separate the bonding roller 6. It is possible to move up and down between the retreat position for retreating out of the transition locus. As described above, since the lower work suction surface 16 is formed as a projecting curved surface as a group of the individual lower suction surfaces 15, each lower suction including the first and second suction tables 5a and 5b. The height at the suction position of the table 5 is varied.

  In FIG. 3, the bonding roller 6 is rotatably supported by a roller base 25, and the roller base 25 is supported by the lower suction disk 2 via a roller lifting structure and a roller moving structure. Guide rails 26 are arranged in front of and behind the bottom wall of the lower suction plate 2, and a roller lifting structure is provided between the slider 27 slidably guided by the guide rails 26 and the previous roller base 25. The roller lifting structure includes a pinion 28 and a rack 29, and a motor 30 that rotationally drives the pinion 28. The rack 29 is guided and supported by a guide body 31 fixed to the slider 27 so as to be movable up and down, and supports the front and rear of the roller base 25 via a buffer body 32 provided at the upper end thereof. By driving the roller 30 lifting / lowering motor 30 in the normal direction or in the reverse direction, the laminating roller 6 is held at the lower standby position below the second work W2 and the upper pressure is pressed against the second work W2 against the first work W1. It can be moved up and down between positions. Moreover, when bonding the 2nd workpiece W2 to the 1st workpiece W1, following the change of the curved surface of the 1st workpiece W1, the bonding roller 6 is raised / lowered, and both workpiece | work W1 * W2 is bonded uniformly. Can be pasted together.

  The roller moving structure includes a guide rail 26 and a slider 27, a timing belt 35 that reciprocates the slider 27, a pair of left and right timing pulleys 36, a motor 37 that rotationally drives one timing pulley 36, and the like. By connecting the upper straight portion of the transition locus of the timing belt 35 to the previous slider 27 with the connecting bracket 38, the slider 27 and the roller lifting structure are reciprocated by the roller moving structure, and the pasting roller 6 is pasted. A reciprocating operation can be performed between the start end and the end of bonding. In addition, the home position when the bonding roller 6 is in the standby position is the left and right center of the previous roller lifting space S as shown in FIG.

  The shock absorber 32 includes a cylinder, a piston, and a commercially available shock absorber provided with a spring for moving and energizing the piston, and the bonding roller 6 moves up and down following the change of the curved surface of the first workpiece W1. When pressing 2 workpiece | work W2, the roller stand 25 is lifted / lowered slightly corresponding to the dispersion | variation in the height position of the bonding roller 6. FIG. Thus, by absorbing the variation in the height position of the bonding roller 6 with the buffer 32, the pressing force of the bonding roller 6 applied to the second workpiece W2 is made uniform, and both workpieces W1 that are curved are curved. -W2 can be more uniformly bonded with a fixed bonding force. In addition, since there is a limit to the minimum controllable movement amount of the pinion 28, the rack 29, and the motor 30 that constitute the roller lifting structure, the height position of the bonding roller 6 varies as described above. However, the buffer body 32 moves up and down a little to absorb the variation in the height position of the bonding roller 6, so that the pressing force of the bonding roller 6 can be made uniform and the variation can be complemented.

  When the first workpiece W1 and the second workpiece W2 are bonded, as shown in FIG. 4, the first workpiece W1 is positioned and placed on the upper workpiece suction surface 12 with the upper suction stand 4 in the open posture. Adsorb and fix. Further, after the second work W2 is positioned and sucked and fixed by the lower suction stand 5 via the silk screen 8, the upper suction disk 1 is closed to bring both the works W1 and W2 into the vertical direction. As shown in FIG. 1, the first workpiece W1 and the second workpiece W2 in this state are held so that the facing distance E between the curved surfaces is constant along the curved surface. The facing distance E can be selected within a range of 0.2 to 5.0 mm depending on the material difference between the workpieces W1 and W2 to be bonded, and the first workpiece W1 is made of a glass substrate. In the case of the present embodiment where W2 is a functional sheet, it is preferably 2.0 mm.

  As described above, the pair of workpieces W1 and W2 that face each other vertically are roughly positioned, but their positional accuracy is not sufficient. In order to improve this positional accuracy to a precise level, displacement detectors (CCD cameras) 40 are arranged at two positions on the left and right sides of the upper suction plate 1 so that the displacement between the workpieces W1 and W2 can be optically detected. I am doing so. Reference numeral 41 denotes a detection hole that penetrates the alignment table 3 and the upper suction table 4 in the vertical direction. The image captured by the deviation detection device 40 is recognized by a not-shown alignment controller, and the alignment table 3 is adjusted based on an output signal from the controller, whereby a pair of workpieces W1 and W2 is obtained. Can be positioned with high positional accuracy while still being held in a curved shape. A structure for adjusting the alignment table 3 is not shown.

  As described above, with the first workpiece W1 and the second workpiece W2 positioned, the laminating roller 6 is raised from the standby position to the pressing position in the roller lifting space S as shown in FIG. The temporary position of the vicinity of the bonding start end of the second workpiece W2 is bonded to the first workpiece W1. Furthermore, as shown in FIG.5 (b), the bonding roller 6 is moved to the bonding start end side in the state which displaced the 1st adsorption stand 5a to the retracted position, and the 1st workpiece | work W1 and the 2nd workpiece | work W2 are moved. Primary bonding is performed. Thereafter, the bonding roller 6 is moved from the bonding start end toward the bonding end, and the entire surfaces of the first work W1 and the second work W2 are secondarily bonded. At the time of secondary bonding, as shown in FIG. 5C, each lower suction table 5 after the second suction table 5b is sequentially switched from the suction position to the retracted position prior to the movement of the bonding roller 6 and retracted. Hold in position.

  The bonding roller 6 at the time of the primary bonding and at the time of the secondary bonding follows the curved shape of the upper work adsorption surface 12, and is moved up and down by a roller lifting structure, and further, the height position of the bonding roller 6. Is absorbed by the buffer 32. Therefore, both work W1 * W2 can be uniformly bonded by fixed bonding force. In addition, the raising / lowering operation | movement of the buffer body 32 when absorbing the dispersion | variation in the pressing force of the bonding roller 6 is only a very small amount, Therefore, when the buffer body 32 act | operates, the up-and-down position of the bonding roller 6 is greatly disturbed. There is no.

  After the secondary bonding is completed, the bonding roller 6 is lowered to move to the roller lifting space S and returned to the home position. As shown in FIG. 5 (d), both the workpieces W1 and W2 in a state where the secondary bonding has been completed are integrated while maintaining a curved shape. Therefore, even if the upper suction disk 1 is opened to release the suction force of the upper suction table 4 and the bonded body is separated from the upper workpiece suction surface 12, the curved shape can be maintained.

As can be understood from the above description, the bonding method for bonding the workpiece according to the present invention in a curved shape is performed by bonding the second workpiece W2 to the first workpiece W1 in accordance with the following steps, whereby both of these W1 · W2 can be suitably bonded.
A step of holding the first work W1 in a curved shape by the upper suction table 4 and a second work W2 in a curved shape by the plurality of lower suction tables 5 provided on the lower suction plate 2;
A step of causing the upper suction disk 1 and the plurality of lower suction tables 5 to face each other vertically and maintaining the facing distance E between the curved surfaces of the first workpiece W1 and the second workpiece W2 constant along the curved surface; ,
The bonding roller 6 provided on the lower suction board 2 side is moved upward from the standby position toward the bonding end in a state where the bonding roller 6 is lifted from the standby position to the pressing position, and the bonding roller 6 moves during that time. A step of bonding the second workpiece W2 to the first workpiece W1 while retracting each lower suction platform 5 from the suction position to the retracted position prior to
In the process of bonding the second workpiece W2 to the first workpiece W1, the bonding roller 6 is moved up and down along the curved shape of the first workpiece W1 to make the second workpiece W2 uniform with respect to the first workpiece W1. It is characterized by pasting with pressing force.

  At least one of the first workpiece W1 before being sucked and held by the upper suction table 4 and the second work W2 before being sucked and held by the lower suction table 5 is formed in a curved shape in advance.

  In the process of bonding the second workpiece W2 to the first workpiece W1, while absorbing the variation in the height position of the bonding roller 6 that presses the second workpiece W2 with the buffer 32, both the workpieces W1 and W2 are made uniform. Bonding with pressing force.

In the step of bonding the second workpiece W2 to the first workpiece W1, the bonding roller 6 is displaced to the pressing position at a position near the bonding start end, and the position near the bonding start end of the second workpiece W2 is set to the first position. Temporarily pasting to work W1,
Continuously to the temporary bonding, the bonding roller 6 is moved to the bonding start end side, and the bonding start end portions of the first work W1 and the second work W2 are primarily bonded,
In succession to the primary bonding, the entire surface of the first workpiece W1 and the second workpiece W2 is secondarily bonded by moving the bonding roller 6 from the bonding start end to the bonding end.

  6 and 7 show another embodiment of the bonding apparatus according to the present invention. There, the bonding roller 6 is arranged on the outer side of the first suction table 5a located at the bonding start end among the seven lower suction tables 5, and the bonding roller 6 is in the standby position at the same position. (State shown in FIG. 6) is the home position. In the bonding apparatus of this Example, both opposing workpieces W1 and W2 are bonded at a stretch from the bonding start end to the bonding end. In detail, as shown to Fig.7 (a), the bonding roller 6 is raised from a standby position to a press position, and the bonding start end of the 2nd workpiece W2 is bonded to the bonding start end of the 1st workpiece W1. Thereafter, as shown in FIG. 7B and FIG. 7C, the bonding roller 6 is moved from the bonding start end toward the bonding end, and the entire surfaces of the first workpiece W1 and the second workpiece W2 are bonded. Match. Each lower suction stand 5 is sequentially switched from the suction position to the retracted position and held at the retracted position prior to the movement of the bonding roller 6. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  In addition to the above-described embodiment, the suction platform lifting structure and roller lifting structure are configured by using a nut body that is operated to be fed by the same screw shaft as the ball screw shaft in addition to the pinion-rack mechanism as a lifting element. can do. Further, the roller moving structure can be configured by using a feed screw shaft and a female screw body that is fed coaxially as a moving element. The upper workpiece suction surface 12 can be formed of a curved surface having a downward protrusion, and the lower workpiece suction surface 16 can be formed of a curved surface having a concave curved surface. The deviation detection device 40 does not need to be an optical detection device using a CCD camera, but detects the positions of magnetic markers provided in advance on the first workpiece W1 and the second workpiece W2, and detects both workpieces W1,. It may be a device that detects the displacement of W2. The buffer body 32 can be arrange | positioned between the roller stand 25 and the roller bearing which pivotally supports the bonding roller 6 rotatably.

  As a combination form of the first workpiece W1 and the second workpiece W2, in addition to the glass substrate and the functional sheet, a glass substrate and a glass substrate, a glass substrate and a glass plate, a glass plate and a glass plate, a glass plate and a functional sheet, A combination form such as a functional sheet and a functional sheet can be employed. Moreover, when either one of the 1st workpiece | work W1 and the 2nd workpiece | work W2 is previously formed in the curved shape, either of the case where each of both the workpiece | work W1 * W2 is previously formed in the curved shape may be sufficient. . Furthermore, when each of the workpieces W1 and W2 is a functional sheet, each workpiece W1 and W2 before bonding may be a flat sheet material. In the above embodiment, the silk screen 8 is stretched on the upper surface of the lower suction plate 2, but depending on the material for forming the second workpiece W2 sucked by the lower suction table 5, the silk screen 8 may be omitted, 5, the second workpiece W2 can be directly sucked and held. For example, when the second workpiece W2 is formed of a material having a self-shape retaining property such as a glass substrate or a glass plate, the silk screen 8 can be omitted.

DESCRIPTION OF SYMBOLS 1 Upper adsorption board 2 Lower adsorption board 3 Alignment table 4 Upper adsorption stand 5 Lower adsorption stand 5a 1st adsorption stand 5b 2nd adsorption stand 6 Bonding roller 8 Silk screen 12 Upper workpiece adsorption surface 15 Lower adsorption surface 16 Lower workpiece adsorption Surface 32 Buffer 40 Deviation detection device (CCD camera)
W1 1st work W2 2nd work S Roller lifting space

Claims (11)

An upper suction disk (1) having an upper suction table (4) for sucking and holding the first work (W1) in a curved shape, and a plurality of lower suction tables (5) for sucking and holding the second work (W2) in a curved shape. And a lower suction disk (2) provided with
In the lower suction disk (2), each lower suction table (5) is separated from the suction position for sucking the second work (W2) and the transition locus of the bonding roller (6) separated from the second work (W2). A suction stand lifting structure that lifts and lowers between the retracted position for retracting to the outside,
A laminating roller (6) for pressing and bonding the second work (W2) to the first work (W1);
A roller raising / lowering structure for raising and lowering the bonding roller (6) between the standby position and the pressing position;
A roller moving structure for moving the bonding roller (6) between the bonding start end and the bonding end of both workpieces (W1, W2) is provided.
Prior to the bonding roller (6) moving from the bonding start end to the bonding end, each work piece is switched while the lower suction stand (5) is sequentially switched from the suction position to the retracted position by the suction stand lifting structure. (W1 ・ W2) is bonded,
The first workpiece (W1) and the second workpiece (W2) are bonded while the bonding roller (6) in the bonding state is moved up and down along the curved shape of the first workpiece (W1) with a roller lifting structure. The bonding apparatus which bonds the workpiece | work characterized by this in curved shape.   The pasting device which pastes the work according to claim 1 in which at least any one of the 1st work (W1) and the 2nd work (W2) is beforehand formed in the curve shape.   The workpiece according to claim 1 or 2, wherein the lower suction surface (15) of each lower suction table (5) is formed in a partially curved shape corresponding to the curved shape of the opposing first workpiece (W1). A laminating device for laminating in a shape. The buffer (32) is arranged between the laminating roller (6) and the roller lifting structure,
In the bonding state, both workpieces (W1, W2) are bonded with a uniform bonding force while absorbing variations in the height position of the bonding roller (6) with the buffer body (32). A laminating apparatus for laminating the workpiece described in any one of the above in a curved shape. A silk screen (8) that supports the second workpiece (W2) is stretched on the upper surface of the lower suction disk (2), and a plurality of lower suction tables (5) and bonding rollers (6) are provided on the lower surface side thereof. Is placed,
The second workpiece (W2) is held by the plurality of lower suction platforms (5) in a curved shape via the silk screen (8), and the second workpiece (W2) is held by the laminating roller (6). The bonding apparatus which bonds the workpiece | work as described in any one of Claim 1 to 4 which presses against (W1) and bonds both workpieces (W1 * W2). A displacement detection device (40) for optically detecting the displacement of the pair of workpieces (W1, W2) on the upper suction disk (1), and an upper suction stand (40) according to an output signal from the displacement detection device (40) 4) and an alignment table (3) for positioning both the workpieces (W1, W2) by adjusting the operation.
The pasting which pastes the work according to any one of claims 1 to 5 in which both works (W1 and W2) are positioned in a state where the pair of works (W1 and W2) are sucked and held in a curved shape, respectively. Combined device. Of the plurality of lower suction tables (5), a first suction table (5a) that supports the bonding start end of the second workpiece (W2), and a second suction table (5b) adjacent to the first suction table (5a). And a roller raising / lowering space (S) that allows the laminating roller (6) to move up and down between the standby position and the pressing position,
In the roller lifting / lowering space (S), the bonding roller (6) is displaced from the standby position to the pressing position, and the position near the bonding start end of the second workpiece (W2) is temporarily bonded to the first workpiece (W1). And
In succession to the temporary bonding, the bonding roller (6) is moved to the bonding start end side with the first suction stand (5a) displaced to the retracted position, and the first workpiece (W1) and the second workpiece are moved. (W2) is primary bonded,
In succession to the primary bonding, the bonding roller (6) is moved from the bonding start end to the bonding end, and the entire surfaces of the first work (W1) and the second work (W2) are secondarily bonded. The bonding apparatus which bonds the workpiece | work as described in any one of Claim 1 to 6 in curve shape. The first workpiece (W1) is suctioned and held in a curved shape by the upper suction table (4), and the second workpiece (W2) is suctioned in a curved shape by a plurality of lower suction tables (5) provided on the lower suction plate (2). Holding, and
The upper suction disk (1) and the plurality of lower suction tables (5) are vertically opposed, and the facing distance (E) between the curved surfaces of the first work (W1) and the second work (W2) is curved. Holding it constant along the surface;
In the state where the laminating roller (6) provided on the side of the lower suction board (2) is raised from the standby position to the pressing position, the laminating roller is moved from the laminating start side to the laminating end, and laminating in the meantime. A step of bonding the second workpiece (W2) to the first workpiece (W1) while retracting each lower suction platform (5) from the suction position to the retracted position prior to the movement of the roller (6). And
In the step of bonding the second workpiece (W2) to the first workpiece (W1), the bonding roller (6) is moved up and down along the curved shape of the first workpiece (W1), and the second workpiece (W2). Is bonded to the first workpiece (W1) with a uniform pressing force to bond the workpiece in a curved shape.   At least one of the first work (W1) before being sucked and held by the upper suction table (4) and the second work (W2) before being sucked and held by the lower suction table (5) is curved in advance. The bonding method which bonds the workpiece | work of Claim 8 formed in the shape in a curve shape.   In the step of bonding the second workpiece (W2) to the first workpiece (W1), the buffer body (32) absorbs variations in the height position of the bonding roller (6) that presses the second workpiece (W2). However, the bonding method which bonds the workpiece | work of Claim 8 or 9 to curve shape, bonding both workpiece | work (W1 * W2) with a uniform pressing force. In the step of bonding the second workpiece (W2) to the first workpiece (W1), the bonding roller (6) is displaced to the pressing position in the vicinity of the bonding start end, and the second workpiece (W2) is bonded. Temporarily pasting the position near the starting end to the first workpiece (W1),
Continuously to the temporary bonding, the bonding roller (6) is moved to the bonding start end side, and the bonding start end portion of the first work (W1) and the second work (W2) is primarily bonded,
In succession to the primary bonding, the bonding roller (6) is moved from the bonding start end to the bonding end, and the entire surfaces of the first work (W1) and the second work (W2) are secondarily bonded. The workpiece | work bonding method which bonds the workpiece | work as described in any one of Claim 8 to 10 in curve shape.

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