JP5124537B2 - Bonding member manufacturing method and bonding member manufacturing apparatus - Google Patents

Description

  The present invention relates to a method for manufacturing a bonding member and a bonding member manufacturing apparatus, and more particularly to a method for manufacturing a bonding member and a bonding member manufacturing apparatus in which a liquid resin is spread over a member without excess or deficiency while avoiding gas mixing.

  A display constructed by bonding an element substrate on which a liquid crystal or an organic light emitting element is mounted and a sealing substrate that protects the element substrate over the entire surface through an adhesive layer as seen in a display of a mobile phone, etc. There exists an apparatus (joining member) (for example, refer patent document 1).

JP 2004-247239 A (FIG. 1 etc.)

  In the display device as described above, it is preferable that no gas exists in the adhesive layer in order to avoid unintended refraction of light emitted from the element substrate. However, in the display device as described above, since the element substrate and the sealing substrate are generally rectangular, it is possible to form the adhesive layer on the entire surface of the substrate, particularly at the corners of the rectangular substrate, without mixing gas into the adhesive layer. was difficult. In other words, when the two substrates are brought close to the final thickness of the adhesive layer after the adhesive is applied to the substrates, an appropriate amount of adhesive is applied to the inside while applying the adhesive along the outer periphery of the substrate. However, if the adhesive is applied only near the center of the substrate to avoid gas entrapment, it will not spread to the corners, but on the other hand, near the center of the substrate. In addition, if an adhesive was applied also to the corner area, the adhesive protruded from the substrate.

  In view of the above-described problems, an object of the present invention is to provide a method for manufacturing a joining member and a joining member manufacturing apparatus in which a liquid resin is spread over the member without excessive or insufficient while avoiding gas mixing.

  In order to achieve the above object, a method for manufacturing a joining member according to a first aspect of the present invention is shown in FIG. 1 and FIG. 4, for example. 1 member D and plate-like second member P are synthetic resin having a predetermined thickness formed by curing liquid resin G, which is a liquid synthetic resin whose viscosity is increased by a predetermined thickening process. A method of manufacturing a joining member C (see, for example, FIG. 2) joined through a layer GL (for example, see FIG. 2); an amount of liquid resin corresponding to the volume of the synthetic resin layer GL (see, for example, FIG. 2) An application step of applying G to the application surface Df of the first member D, the main part Gm applied substantially covering the centroid Dc of the planar shape of the first member D, and the main part Gm It is applied to the vicinity of the corner De of the first member D on a virtual guide line Lb connecting the corner De of the first member D. An application step of applying the liquid resin G so as to form the guiding portion Gb; an alignment step of making the application surface Df and the joint surface Pf of the second member P face each other (see, for example, FIG. 4B) An approaching step (see, for example, FIG. 4C) for bringing the coating surface Df and the bonding surface Pf closer to a distance corresponding to a predetermined thickness; and a leading end of the guide member Gb on the corner De side of the first member D A thickening step (for example, refer to FIG. 4D) for applying a thickening treatment to the liquid resin G of the portion.

  With this configuration, since the liquid resin is applied to the vicinity of the corner of the first member, the liquid resin can reach the corner when the first member and the second member are brought close to each other. Since the thickening treatment is performed on the liquid resin, the spreading of the thickened portion can be suppressed and the liquid resin can be prevented from protruding.

  Moreover, the manufacturing method of the joining member which concerns on the 2nd aspect of this invention is the induction | guidance | derivation in an application | coating process in the manufacturing method of the joining member which concerns on the said 1st aspect of this invention, as shown, for example in FIG. The portion Gb is formed in a straight line, the tip of the first member D on the corner De side is tapered (Gb2), and the length of the tapered portion Gb2 is 1.2 times the width Gbw of the straight line Gb1. It is formed 3.8 times or less.

  If comprised in this way, liquid resin can be apply | coated in an application | coating process to the position where liquid resin reaches | attains reliably to the corner | angular of a 1st member when an approach process is performed.

  Moreover, the manufacturing method of the joining member which concerns on the 3rd aspect of this invention WHEREIN: In the manufacturing method of the joining member which concerns on the said 1st aspect or 2nd aspect of the said invention, if it shows, for example with reference to FIG. The thickening step (see, for example, FIG. 4D) is started when the liquid resin G guiding portion Gb reaches one side Ds of the first member D.

  If comprised in this way, it will become easy to balance with filling to the corner | angular part of liquid resin, and suppression of a protrusion.

  Moreover, the manufacturing method of the joining member which concerns on the 4th aspect of this invention is, for example, as shown in FIG. 3, the joining member which concerns on any one aspect of the said 1st aspect thru | or 3rd aspect of this invention. In the production method, the liquid resin G is increased in viscosity when irradiated with electromagnetic waves having a predetermined wavelength; the thickening step (see, for example, FIG. 4D) The joint surface Pf and the coating are applied from the outside of the virtual space formed by extending the outer edge of one member D in the vertical direction toward the joint surface Pf or the coating surface Df with which the liquid resin G at the tip of the guide portion Gb is in contact. The irradiation is performed along the irradiation line Ls inclined at a predetermined angle θ with respect to the normal Lv of the surface to which the electromagnetic wave having a predetermined wavelength is directed in the surface Df.

  If comprised in this way, a viscosity will become high outside the liquid resin of the front-end | tip of an induction | guidance | derivation part, and it will become difficult to protrude liquid resin.

  In order to achieve the above object, a joining member manufacturing apparatus according to a fifth aspect of the present invention includes a plate-like first member D having a polygonal planar shape, as shown in FIG. The plate-like second member P and a synthetic resin layer GL having a predetermined thickness formed by curing a liquid resin G, which is a liquid synthetic resin whose viscosity is increased by a predetermined thickening process (for example, FIG. 2). An apparatus 1 for manufacturing a joining member C (see, for example, FIG. 2) joined via a reference); a liquid resin coating apparatus 21 for applying a liquid resin G to the application surface Df of the first member D; A virtual guide line Lb connecting the main part Gm and the corner De of the first member D substantially covering the planar centroid Dc of the first member D and applied with the liquid resin G A state in which the guide part Gb on which the liquid resin G is applied to the vicinity of the corner De of the first member D is formed A control device 60 for controlling the liquid resin coating device 21 so as to apply the liquid resin G; an alignment device 13 for making the coating surface Df and the joint surface Pf of the second member P face each other; and the coating surface Df and the joint surface An approach device 14 for bringing Pf close to a distance corresponding to a predetermined thickness; and the viscosity of the tip portion of the liquid resin G applied to the application surface Df on the corner De side of the first member D of the guide portion Gb. And a thickening means 41 for performing a thickening process to be increased.

  If comprised in this way, since a liquid resin coating device is controlled so that liquid resin may be applied in the state where the guidance part to which liquid resin was applied to the vicinity of the corner of the 1st member was formed, the 1st member and When the second member is approached, the liquid resin can reach the corner. In addition, since there is a thickening means for performing a thickening process that increases the viscosity of the tip end portion of the first member of the guide portion, the liquid resin is first formed by the approaching device bringing the application surface and the joint surface close to each other. When it is about to protrude from the first member and / or the second member, it is possible to increase the viscosity of the liquid resin in the portion and prevent the liquid resin from protruding.

  The joining member manufacturing apparatus according to the sixth aspect of the present invention is the same as the joining member manufacturing apparatus 1 according to the fifth aspect of the present invention (see, for example, FIG. 1). The manufacturing method of the joining member which concerns on any one aspect of the said 1st aspect thru | or 4th aspect of this invention is performed.

  If comprised in this way, when the 1st member and the 2nd member are made to approach, liquid resin can be made to reach the corner, and the extension of the liquid resin of the corner portion which performed the thickening treatment The liquid resin can be prevented from protruding.

  According to the present invention, the liquid resin can reach the corner when the first member and the second member are brought close to each other, and the liquid resin is spread at the corner portion subjected to the thickening treatment. Since the liquid resin can be suppressed and the liquid resin can be prevented from protruding, the liquid resin can be spread over the member without excess or deficiency while avoiding gas mixing.

It is a perspective view which shows the outline of the joining member manufacturing apparatus which concerns on embodiment of this invention. It is a figure which illustrates the composition of a joining member. (A) is a top view, (b) is a front view. It is the elements on larger scale explaining the irradiation condition of an ultraviolet-ray. It is a figure explaining the state of the joining member manufacturing apparatus in the manufacture process of a joining member. It is a figure which shows the 1st member with which liquid resin was apply | coated. (A) is a top view, (b) is the elements on larger scale of the corner | angular part of a 1st member. It is a fragmentary top view explaining the timing of the thickening process with respect to the spread state of liquid resin.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or similar members are denoted by the same or similar reference numerals, and redundant description is omitted.

  First, with reference to FIG. 1, the joining member manufacturing apparatus 1 which concerns on embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing a schematic configuration of a joining member manufacturing apparatus 1. The joining member manufacturing apparatus 1 includes a nozzle 21 as a liquid resin application device that applies an adhesive G as a liquid resin to the application surface Df of the first member D, and the first member D and the second member P. A reversing unit 10 to be bonded, a UV irradiator 41 as a thickening means for increasing the viscosity of the outer peripheral portion of the adhesive G, and a control device 60 for controlling the operation of the joining member manufacturing apparatus 1 are provided. Here, prior to detailed description of the bonding member manufacturing apparatus 1, the configuration of the bonding member manufactured by the bonding member manufacturing apparatus 1 is illustrated.

  2A and 2B are diagrams illustrating the configuration of the joining member C, where FIG. 2A is a plan view and FIG. 2B is a front view. The joining member C is composed of a liquid crystal panel D, which is a kind of image display device as a first member, and a protective glass P functioning as a protective plate as a second member, with an adhesive layer GL interposed therebetween. It is a part. The adhesive layer GL is a layer that functions as an intermediate layer as a synthetic resin layer formed by spreading the adhesive G (see FIG. 1). The joining member C manufactured in the present embodiment is a part typically used for a display of a mobile phone. Hereinafter, in the present embodiment, it is assumed that the first member is the liquid crystal panel D and the second member is the protective glass P.

  The liquid crystal panel D has a size suitable for a mobile phone display and is formed in a rectangular plate shape. The protective glass P is formed in a rectangular plate shape that is slightly larger than the liquid crystal panel D. The adhesive G that forms the adhesive layer GL includes a synthetic resin and is configured to increase in viscosity when irradiated with ultraviolet rays. Further, the viscosity of the adhesive G is increased by cooling. The viscosity of the adhesive G before the thickening treatment described below is preferably 100 to 5000 mPa · s, and more preferably 1000 to 5000 mPa · s. The adhesive layer GL attaches the liquid crystal panel D and the protective glass P, and holds the distance between the liquid crystal panel D and the protective glass P at a predetermined distance (a distance corresponding to a predetermined thickness) when cured. It plays the role of an intermediate layer. The amount of the adhesive G in the bonding member C is an amount that becomes the thickness of the intermediate layer that should be interposed in order to set the interval between the liquid crystal panel D and the protective glass P to a predetermined interval.

  As described above, in the present embodiment, the first member is a rectangular plate-shaped liquid crystal panel D, and the second member is a rectangular plate-shaped protective glass P. However, the first member and The second member can be applied to other than these. The first member and the second member are separate bodies and are typically made of different materials, but may be the same material. The first member may be a polygon having a planar shape other than a rectangle, but typically a polygon having a generally triangular to hexagonal shape (the sum of inner angles is 180 ° to 720 °) is used. . If the planar shape of the first member is a circle, the adhesive G is spread by applying the adhesive G to the central portion of the first member and spinning it to spread over the entire plane of the first member. Is possible. However, when the planar shape of the first member is a polygon (typically rectangular), it is difficult to spread the adhesive G over the entire plane by the same spinning method as that of the circular member. It is difficult to spread the adhesive G on the surface. In the present embodiment, an apparatus and a method that can spread the adhesive G over the entire plane including the corners of the first member whose plane shape is formed in a polygonal shape will be described. The second member may have a planar shape other than a rectangle (for example, a circle or an ellipse).

  Returning to FIG. 1 again, the description of the joining member manufacturing apparatus 1 will be continued. The reversing unit 10 includes a mounting table 11 on which the liquid crystal panel D is mounted, a driver 14 that reverses the mounting table 11, and a vertical rail 15 that moves the mounting table 11 in the vertical direction. The mounting table 11 has a thick plate shape, and the planar shape thereof is a shape having a rectangular shape that is substantially the same size as the liquid crystal panel D, with the four corners cut off (see also FIG. 4B). ). The area of the four corners to be cut off of the mounting table 11 is preferably an area to which the UV irradiator 41 wants to apply ultraviolet light. The mounting table 11 typically has a plurality of vent holes communicating with a vacuum pump (not shown) on the surface in contact with the liquid crystal panel D, and the liquid crystal panel D is evacuated by the operation of the vacuum pump (not shown). It is configured so that it can be adsorbed.

  The driver 14 is configured by housing a motor (not shown) in a rectangular parallelepiped casing 14a. A rotation shaft (not shown) of the motor protrudes from one surface of the housing 14a to the outside, and a cylindrical reversing shaft 13 is attached to the protruding rotation shaft (not shown). The reversing shaft 13 is attached so that both axes coincide with a rotating shaft (not shown) and extend horizontally. The cylindrical side surface of the reversing shaft 13 and the thickness portion of the mounting table 11 are connected via the reversing arm 12. The mounting manner of the mounting table 11 with respect to the reversing arm 12 is such that the position where the top plate (upper surface) of the mounting table 11 is horizontal can be set as the home position. The driver 14 can reverse the mounting table 11 along the circumference of a virtual circle whose radius is the distance from the axis of the reversing shaft 13 to the mounting table 11 by rotating the reversing shaft 13 around the axis. It is configured. A mounting on which the protective glass P is mounted at a position facing the mounting table 11 when the mounting table 11 comes to the opposite side of the home position (hereinafter referred to as “reverse position”) along the circumference of the virtual circle. A table 31 is provided. The top plate (upper surface) of the mounting table 31 is horizontal. In the present embodiment, the mounting table 31 is fixed in the vertical direction.

  The driver 14 also houses a gear (not shown) and a motor (not shown) for rotating the gear (not shown) in the housing 14a. A motor (not shown) for rotating a gear (not shown) is typically different from that for rotating the reversing shaft 13. The gear (not shown) is engaged with the vertical rail 15 installed so as to extend in the vertical direction, and the casing 14a moves up and down along the vertical rail 15 by rotating the gear (not shown). Along with this, the mounting table 11 indirectly connected to the housing 14a is also configured to move up and down in the vertical direction.

  As described above, the reversing unit 10 reverses the mounting table 11 to apply the application surface Df of the liquid crystal panel D placed on the mounting table 11 and the bonding surface Pf of the protective glass P placed on the mounting table 31. Since the application surface Df and the bonding surface Pf can be brought close to each other by moving the mounting table 11 in the vertical direction, it also functions as an access device. Have.

  The nozzle 21 is provided at a position where the adhesive G can be supplied to the application surface Df of the liquid crystal panel D mounted on the mounting table 11 at the home position. The nozzle 21 is provided with a valve 22 so that the presence or absence of the discharge of the adhesive G from the nozzle 21 can be controlled by opening and closing the valve 22. Further, the nozzle 21 is attached to a moving member 23 that can arbitrarily move above the liquid crystal panel D at the home position, and can arbitrarily move above the liquid crystal panel D via the moving member 23. It is configured to be able to.

  The UV irradiator 41 is a device that irradiates ultraviolet rays in order to increase the viscosity of the adhesive G. The four UV irradiators 41 of the liquid crystal panel D in the inversion position are arranged so that each of the four corners of the liquid crystal panel D sucked and held by the mounting table 11 in the inversion position can be irradiated with ultraviolet rays. It is installed above each of the four corners (see also FIG. 4 (d)).

  As shown in the partially enlarged view of FIG. 3, in the present embodiment, UV is irradiated in a direction in which ultraviolet rays are irradiated from the outside of the vertically upper region (virtual space) of the liquid crystal panel D toward the corner of the liquid crystal panel D. An irradiator 41 is provided. More specifically, the direction outside the joint surface Pf (the space outside the virtual space) with respect to the perpendicular Lv of the joint surface Pf facing the corner portion of the application surface Df of the liquid crystal panel D at the inversion position. A UV irradiator 41 is provided so that ultraviolet rays are irradiated along an irradiation line Ls (virtual line) inclined at a predetermined angle θ. The irradiation line Ls is located on a virtual plane including the horizontal line Lh connecting the point where the perpendicular line Lv intersects the application surface Df and the vertex of the corner of the application surface Df closest to that point, and the perpendicular line Lv. Is preferred. If comprised in this way, a viscosity can be made so high that it goes outside with respect to the adhesive agent G which exists in the corner | angular part vicinity of the liquid crystal panel D, and the protrusion of the adhesive agent G from the liquid crystal panel D is suppressed. be able to.

  The control device 60 is connected to the reversing unit 10 (particularly, the two motors of the driver 14) by a signal cable, and can rotate the reversing shaft 13 about the axis in the forward and reverse directions and move the driver 14 vertically and vertically. It is comprised so that it can be moved to. The control device 60 is connected to the valve 22 and the moving member 23 by a signal cable, and is configured to be able to control the opening and closing of the valve 22 and the movement of the nozzle 21. The control device 60 is connected to the UV irradiator 41 through a signal cable, and is configured to control the presence or absence of ultraviolet irradiation. The control device 60 includes a first control device that controls the valve 22 and the moving member 23, a second control device that controls the reversing unit 10, and a third control device that controls the UV irradiator 41, respectively. Although it can be configured as a separate body, in the present embodiment, it is configured integrally physically while enabling conceptual distinction, and in the following, it is an integrated control device 60 without particular distinction. Will be described.

  With continued reference to FIG. 4, the operation of the joining member manufacturing apparatus 1 will be described. FIG. 4 is a diagram illustrating a state of the joining member manufacturing apparatus 1 in the manufacturing process of the joining member C. The process of manufacturing the bonding member C by the bonding member manufacturing apparatus 1 is one embodiment of the present invention in which the method for manufacturing the bonding member is embodied. In the following description, when referring to the configuration of the bonding member manufacturing apparatus 1 or the structure of the bonding member C, FIGS. 1 to 3 will be referred to as appropriate. When manufacturing the joining member C, first, the robot (not shown) grasps one liquid crystal panel D in the liquid crystal tray (not shown) in which the liquid crystal panel D prepared in the previous process is accommodated, and the coating surface Df is determined. Place it on the mounting table 11 facing upward. On the other hand, a robot (not shown) grasps one protective glass P in a glass tray (not shown) in which the protective glass P prepared in the previous process is accommodated, and the joint surface Pf faces upward on the mounting table 31. Place. When the liquid crystal panel D and the protective glass P are mounted on the mounting tables 11 and 31, respectively, the adhesive G is discharged from the nozzle 21 while appropriately moving the nozzle 21, and the adhesive G is applied to the application surface Df of the liquid crystal panel D. Application is performed (application process, see FIG. 4A). When the adhesive G is applied, the mounting table 11 on which the liquid crystal panel D is mounted is in the home position.

  Here, the application state of the adhesive G will be described with reference to FIG. 5A and 5B are diagrams showing the liquid crystal panel D to which the adhesive G is applied. FIG. 5A is a plan view and FIG. 5B is a partially enlarged view of a corner portion of the liquid crystal panel D. FIG. The nozzle 21 moves on the application surface Df while controlling the opening and closing of the valve 22 by a signal from the control device 60, and applies the adhesive G to the application surface Df so that the main part Gm and the guide part Gb are formed. Apply. The formed main portion Gm substantially covers the centroid Dc of the planar shape (application surface Df) of the liquid crystal panel D. The term “substantially covering” here means not only when covering the centroid Dc, but also covering the centroid Dc to the extent that it can be understood as a whole even if there is a gap on the centroid Dc. The case where the centroid Dc is covered when the adhesive G is spread, for example, is also included. Thus, the main part Gm may formally be open above the centroid Dc, but from the viewpoint of avoiding air bubbles from entering the adhesive layer GL when it becomes the joining member C, the main part Gm is bonded. It is preferable that the shape to which the agent G is applied is determined. In the present embodiment, the main portion Gm is formed in a substantially similar shape that is reduced with respect to the coating surface Df with reference to the centroid Dc. The “substantially similar shape” is a shape that reaches the outer periphery of the application surface Df when the adhesive G is spread. The main portion Gm is formed by the nozzle 21 reciprocating linearly and moving at a right angle to the straight line by the width of the straight line at the end where the nozzle 21 turns back. Alternatively, the nozzle 21 is moved in the longitudinal direction of the rectangular application surface Df so as to pass through the centroid Dc, and the discharge amount per unit time of the adhesive G is increased as compared with the case where the guide part Gb is formed. You may form by making 21 movement speed slow.

  The guide part Gb is formed in a linear shape on a virtual guide line Lb connecting the main part Gm and the corner De of the liquid crystal panel D. It does not matter whether the guide line Lb passes through the centroid Dc. Typically, the guide line Lb passes through a point where the distance from the corner De to the main part Gm is the shortest, or a line that bisects the corner De. Although it is defined, it may be appropriately determined from the viewpoint of spreading the application surface Df without a gap when the adhesive G is spread. The guiding portions Gb are formed by the number of corners De (four in the present embodiment) of the liquid crystal panel D, and each guiding portion Gb is in contact with the main portion Gm at the end on the main portion Gm side, and on the corner De side. Is stopped near the corner De. Here, the vicinity of the corner De refers to the adhesive G without contacting the corner De and before the liquid crystal panel D and the protective glass P approach the finishing distance (a distance corresponding to the thickness of the adhesive layer GL). Is close enough to reach the side Ds near the corner De. By doing in this way, when adhesive G is extended, it can control that it protrudes from corner De neighborhood. Furthermore, by forming the tip on the corner De side of the guide portion Gb to be tapered, it is possible to improve the effect of suppressing the protrusion while reaching the corner De when the adhesive G is spread.

  A partially enlarged view of FIG. 5B shows a tapered state of the guiding portion Gb. The guide part Gb is typically formed by discharging the adhesive G while the nozzle 21 moves from the main part Gm side to the corner De side. The nozzle 21 moves at a constant speed while discharging the adhesive G having a constant flow rate from the main part Gm to the boundary point Lbs on the guide line Lb, thereby forming a linear part Gb1 having a substantially equal width Gbw. After the point Lbs, the tapered portion Gb2 is formed by reducing the flow rate discharged to the liquid crystal panel D. In order to form the tapered portion Gb2, for example, the valve 22 is opened until the nozzle 21 moving at a constant speed reaches the boundary point Lbs, and the valve 22 is closed when the boundary point Lbs is reached. After the boundary point Lbs, the nozzle 22 is closed. This can be realized by applying the adhesive G remaining in the nozzle 21 to reduce the flow rate of the adhesive G discharged from the nozzle 21. Alternatively, instead of opening / closing control of the valve 22 or instead of opening / closing control of the valve 22, the unit length of the adhesive G supplied to the application surface Df in the direction of the guide line Lb by increasing the moving speed of the nozzle 21 after the boundary point Lbs. The tapered part Gb2 may be formed by reducing the flow rate per unit. At this time, the tapered portion Gb2 may be formed so that the length of the tapered portion Gb2 (distance along the guide line Lb) is 1.2 times or more and 3.8 times or less of the width Gbw of the linear portion Gb1. Alternatively, when the width Gbw passing through the boundary point Lbs is used as a base and approximated to a triangle having the tip of the tapered part Gb2 as a vertex, the tapered part Gb2 is set so that the angle of the vertex facing the base is 15 to 45 °. It is good to form. In this way, when the adhesive G is spread by bringing the application surface Df and the joint surface Pf close to each other, the adhesive G can be applied to a position where the adhesive G reliably reaches the corner De. it can. In addition, the application amount to the application surface Df of the adhesive G that combines the main portion Gm and each guide portion Gb is the adhesive layer when the joining member C having the adhesive layer GL having a predetermined thickness is manufactured. This is an amount corresponding to the volume of GL. Hereinafter, it returns to FIG. 4 again and description of the effect | action of the joining member manufacturing apparatus 1 is continued.

  When the application of the adhesive G is completed, the control device 60 rotates the reversal shaft 13 to reverse the liquid crystal panel D at the home position to the reversal position, and makes the application surface Df face the bonding surface Pf (positioning step). FIG. 4B). At this time, the distance between the application surface Df and the bonding surface Pf is larger than the thickness of the adhesive layer GL when the bonding member C is formed, and is typically spread on the application surface Df. The driver 14 is present at a position (height) at which the adhesive G before contact does not come into contact with the joint surface Pf.

  When the application surface Df is opposed to the joint surface Pf, the control device 60 moves the driver 14 downward along the vertical rail 15 so that the distance between the application surface Df and the joint surface Pf is a predetermined thickness of the adhesive layer GL. It is made to approach until it becomes the distance equivalent to this (approach process, refer FIG.4 (c)-(d)). In the approaching process, the adhesive G in the vicinity of the centroid Dc where a relatively large amount of the adhesive G exists in the surroundings hangs down from the other parts. The adhesive G comes into contact with the joint surface Pf so as to spread. In the alignment step described above, since the liquid crystal panel D coated with the adhesive G is inverted and positioned vertically above the protective glass P, a part of the coated adhesive G is dripped. The adhesive G can be started to come into contact with the protective glass P in a relatively small area, and the mixing of bubbles into the adhesive G between the liquid crystal panel D and the protective glass P can be suppressed. can do. When the application surface Df and the bonding surface Pf further approach, the adhesive G sandwiched between the application surface Df and the bonding surface Pf spreads and gradually spreads toward the outer periphery of the liquid crystal panel D. At this time, the contact of the adhesive G on the joint surface Pf started from the vicinity of the centroid Dc of the main part Gm reaches the guiding part Gb. When the application surface Df comes into contact with the joint surface Pf up to the leading end of the guide portion Gb and the application surface Df and the joint surface Pf approach each other, the leading end of the guide portion Gb also extends toward the corner De of the liquid crystal panel D.

  When the leading end of the guiding part Gb reaches near the corner De during the approaching process, the control device 60 operates the UV irradiator 41 to irradiate the guiding part Gb near the corner De with ultraviolet rays, and the ultraviolet rays are irradiated. The thickening process is performed to increase the viscosity of the adhesive G in the portion (the thickening step, see FIGS. 4D to 4E). At this time, since the four corners of the mounting table 11 are cut off, it is possible to reliably irradiate the adhesive G near the corner De with ultraviolet rays. By performing the thickening treatment, the spreading speed of the adhesive G in the portion where the viscosity has increased is slowed, the spreading of the adhesive G in the portion is suppressed, and the adhesive G protrudes from the liquid crystal panel D. Is suppressed.

  As shown in the partial plan view of FIG. 6, the timing of starting the irradiation of ultraviolet rays (thickening process) is one when the adhesive G is one of the liquid crystal panel D when the guiding part Gb is extended in the approaching step. It may be when the side Ds is reached. This makes it easier to balance the filling of the adhesive G into the corner De and the suppression of the protrusion in the further approaching step, and the adhesive layer GL can be formed without excess or deficiency. In particular, since the adhesive G is applied so that the tip of the guide portion Gb is tapered (see FIG. 5B), the adhesive G can be easily spread to the corner De. To determine whether or not the adhesive G has reached the side Ds, for example, a camera (not shown) connected by a signal cable is installed in the control device 60, and the camera (not shown) is connected to the side Ds of the adhesive G. When the arrival at is detected, the UV irradiator 41 can be activated.

  Even after the thickening process is started, the approaching process is continued until the distance between the application surface Df and the bonding surface Pf becomes a distance corresponding to a predetermined thickness of the adhesive layer GL. By performing the thickening process while the approaching process is continued, spreading of the adhesive G in the portion where the viscosity has increased is suppressed. And since the part to which the thickening process is not performed is a liquid with a comparatively small viscosity, the adhesive agent G is easy to spread | diffuse along the application surface Df and the joint surface Pf which are in contact. That is, even if the portion of the adhesive G that reaches the side Ds gradually increases, the space between the two passes through the application surface Df and the joint surface Pf rather than jumping out from the side Ds within the allowable range. There is a tendency. This is considered to be due to the surface tension of the adhesive G. That is, in the approaching process, even if the speed at which the adhesive G reaches the entire side Ds is slightly deviated, if the difference is small, the adhesive G that has previously reached the side Ds is more likely to protrude from the liquid crystal panel D due to surface tension. It diffuses into the space between the coating surface Df and the bonding surface Pf. Thus, when the distance between the application surface Df and the bonding surface Pf reaches a distance corresponding to a predetermined thickness of the adhesive layer GL, the adhesive G is filled over the entire application surface Df without protruding. It will be.

  When the approaching step is completed, the adhesive G filled between the application surface Df and the bonding surface Pf is cured so as not to flow to form the adhesive layer GL (finishing step). Since the adhesive G is denatured so that the viscosity increases in accordance with the integrated amount of irradiated ultraviolet rays, the adhesive G can be cured by increasing the integrated amount of ultraviolet rays irradiated from the UV irradiator 41. it can. Curing of the adhesive G is typically performed by spreading the irradiated ultraviolet rays over the entire adhesive G. At this time, it is good also as releasing the adsorption | suction holding | maintenance of the mounting base 11, and returning the mounting base 11 to a home position. The finishing process is typically performed by an irradiator (not shown) that is different from the UV irradiator 41 and can cover the entire liquid crystal panel D with the irradiated ultraviolet rays.

  As described above, in the bonding member manufacturing apparatus 1 and the manufacturing method of the bonding member C according to the present embodiment, since the adhesive G is applied to the vicinity of the corner De of the application surface Df, the guide portion Gb is formed. When the liquid crystal panel D and the protective glass P are brought close to each other, the adhesive G can reach the corner De. Also, when the adhesive G reaches the side Ds in the vicinity of the corner De, the thickening process is performed by irradiating ultraviolet rays, so that the spreading of the adhesive G at the corner De subjected to the thickening process is suppressed. It is possible to prevent the adhesive G from protruding. Accordingly, it is possible to spread the adhesive G over the application surface Df of the liquid crystal panel D without excess or deficiency while avoiding gas mixing.

  In the above description, the liquid resin is the adhesive G whose viscosity increases when irradiated with ultraviolet rays as electromagnetic waves having a predetermined wavelength. However, the viscosity increases when irradiated with electromagnetic waves having predetermined wavelengths other than ultraviolet rays. It may be of a nature, or may be of a nature in which the viscosity is increased by heating, for example, other than irradiating an electromagnetic wave of a predetermined wavelength. In addition to electromagnetic waves having a predetermined wavelength other than ultraviolet rays, the electromagnetic waves can be specified by distinguishing radio waves, infrared rays, visible rays, X-rays, gamma rays, and can be specified with a specific wavelength (nanometer) range. . And a thickening process will depend on the characteristic of the liquid resin used. In other words, means capable of increasing the viscosity (an electromagnetic wave irradiator, a heater, a cooler, etc.) having a predetermined wavelength is appropriately employed depending on the characteristics of the liquid resin used.

  In the above description, the planar shape of the mounting table 11 is formed such that the corners of the liquid crystal panel D (first member) appear. However, if the corner portion can be thickened, the corners are increased. It does not have to be formed to appear. For example, when the mounting table 11 is formed of a material that transmits ultraviolet rays, the corners of the mounting table 11 may not be cut off, or when a liquid resin that thickens by heating is used, the corners of the mounting table 11 are used. It is good also as a structure which enables thickening by providing heating means, such as a heater, at the corner of the mounting table 11 without being cut off.

  In the above description, the UV irradiator 41 is provided outside the virtual space formed by extending the outer edge of the liquid crystal panel D vertically upward, in other words, provided on the liquid crystal panel D side. However, as long as the adhesive G can be irradiated with ultraviolet rays, it may be provided on the side of the protective glass P (which is a material that transmits ultraviolet rays in the present embodiment). That is, it may be provided outside the virtual space formed by extending the outer edge of the liquid crystal panel D vertically downward. Alternatively, the UV irradiator 41 may be provided on the same horizontal plane as the liquid crystal panel D (a position where the predetermined angle θ is 90 °). As described above, when the UV irradiator 41 is provided outside the virtual space formed by extending the outer edge of the liquid crystal panel D in the vertical direction (upper and lower appropriate directions), the tip of the guiding portion Gb is bonded. The outside of the agent G is preferable because the viscosity increases and the adhesive G is more difficult to protrude. However, when the viscosity does not have to increase as the outside of the adhesive G at the tip of the guiding portion Gb, the UV irradiator 41 is provided in a virtual space formed by extending the outer edge of the liquid crystal panel D in the vertical direction. It may be done.

  In the above description, in the alignment step, the liquid crystal panel D (first member) is inverted to make the coating surface Df and the bonding surface Pf face each other, but the protective glass P (second member) is inverted. It is good also as making it move, or good also as moving both. In the approaching step, the liquid crystal panel D (first member) is moved in the vertical direction. However, the protective glass P (second member) may be moved in the vertical direction, or both may be moved closer to each other. It is also possible to make it.

DESCRIPTION OF SYMBOLS 1 Joining member manufacturing apparatus 10 Inversion unit 13 Inversion shaft 14 Driver 21 Nozzle 41 UV irradiator 60 Control apparatus C Joining member D Liquid crystal panel (1st member)
Df Application surface Dc Centroid Ds Side De Angle P Protective glass (second member)
Pf Bonding surface G Adhesive (liquid resin)
Gm Main part Gb Guide part Gb1 Straight line part Gb2 Tapered part Gbw Width GL Adhesive layer Lb Guide line Ls Irradiation line Lv Perpendicular line

Claims (6)

The liquid resin, which is a liquid synthetic resin whose viscosity increases by a predetermined thickening treatment, is cured by the plate-like first member and the plate-like second member having a planar shape formed into a polygon. A method for producing a joined member joined via a synthetic resin layer having a predetermined thickness formed;
An application step of applying an amount of the liquid resin corresponding to the volume of the synthetic resin layer to the application surface of the first member, substantially covering the centroid of the planar shape of the first member; The liquid resin so as to form a main part that is formed and a guide part that is applied to a vicinity of the corner of the first member on a virtual guide line that connects the main part and the corner of the first member. An application step of applying
An alignment step of making the application surface and the bonding surface of the second member face each other;
An approaching step of bringing the application surface and the joint surface closer to a distance corresponding to the predetermined thickness;
A thickening step of performing the thickening treatment on the liquid resin at the tip of the guide portion on the corner side of the first member;
A method for manufacturing a joining member. The guide portion in the coating step is formed in a straight line shape, and a tip on the corner side of the first member is tapered, and the length of the tapered portion is 1.2 times the width of the straight line. More than 3.8 times formed;
The manufacturing method of the joining member of Claim 1. Starting the thickening step when the guiding portion of the liquid resin reaches one side of the first member;
The manufacturing method of the joining member of Claim 1 or Claim 2. The liquid resin increases in viscosity when irradiated with an electromagnetic wave having a predetermined wavelength;
In the thickening step, the liquid resin at the tip of the guiding portion is in contact with the electromagnetic wave having the predetermined wavelength from the outside of a virtual space formed by extending the outer edge of the first member in the vertical direction. Irradiating along the irradiation line inclined at a predetermined angle with respect to the perpendicular of the surface of the bonding surface and the coating surface to which the electromagnetic wave of the predetermined wavelength is directed toward the bonding surface or the coating surface Done by
The manufacturing method of the joining member of any one of Claim 1 thru | or 3. The liquid resin, which is a liquid synthetic resin whose viscosity increases by a predetermined thickening treatment, is cured by the plate-like first member and the plate-like second member having a planar shape formed into a polygon. An apparatus for producing a joining member joined through a synthetic resin layer having a predetermined thickness formed;
A liquid resin coating apparatus for coating the liquid resin on the coating surface of the first member;
The main part substantially covering the centroid of the planar shape of the first member and coated with the liquid resin, and the first guide line on the virtual guide line connecting the main part and the corner of the first member A control unit that controls the liquid resin coating device so as to apply the liquid resin in a state where the liquid resin is applied to the guide portion where the liquid resin is applied to the vicinity of the corner of the member;
An alignment device that opposes the application surface and the bonding surface of the second member;
An approach device for bringing the application surface and the joint surface closer to a distance corresponding to the predetermined thickness;
A thickening means for applying the thickening treatment to increase the viscosity of the tip portion of the guide member on the corner side of the first member of the liquid resin applied to the application surface;
Joining member manufacturing equipment. The said control apparatus performs the manufacturing method of the joining member of any one of Claims 1 thru | or 4.
The joining member manufacturing apparatus according to claim 5.

Images