JP2014206568A - Plate-like member lamination method and plate-like member lamination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate-like member lamination method capable of laminating a plate-like member capable of handling thin and large devices having narrow frame free from air bubbles with a high productivity at a low cost.SOLUTION: The plate-like member lamination method laminates a first plate-like member 1 and a second plate-like member 2 while extending an adhesive material disposed therebetween while pressing the second plate-like member 2 against the rectangular first plate-like member 1 with a press roller 105 as press means and moving the same. The plate-like member lamination method includes a press-expanding step in which the press roller 105 is driven to perform a relative movement toward a corner 1a of the first plate-like member 1, and the width of pressed portion in the first plate-like member 1 by the press roller 105 via the second plate-like member 2 gets smaller as the adhesive material disposed between the second plate-like member 2 and the first plate-like member 1 is expanded.

Description

  The present invention relates to a plate-shaped member bonding method and a plate-shaped member bonding apparatus, in which two plate-shaped members are bonded together by pressing the plate-shaped member against another plate-shaped member.

  For example, the present invention belongs to the technical field of bonding of a touch panel and a flat display such as a liquid crystal display device, a plasma display, or an organic EL, or organic EL lighting.

  In general, in laminating a first plate-like member such as a liquid crystal panel and a second plate-like member such as a transparent touch panel or a cover glass for protecting the surface, it is extremely difficult for bubbles to be mixed between the members. is important. The mixing of bubbles causes deterioration in display quality and causes peeling.

  As a method and apparatus for laminating plate-like members that prevent air bubbles from being mixed, those that perform laminating in a vacuum are known. In this type of plate member bonding method and apparatus, before bonding, the first plate member and the second plate member are introduced into the vacuum chamber, and the chamber is evacuated. After the bonding is completed, the inside of the chamber is returned to atmospheric pressure, and the first plate member and the second plate member are taken out.

  However, such a plate-like member laminating method / apparatus has a problem that productivity is low because a large vacuum chamber or the like is required and evacuation is required every time the laminating is performed.

  Moreover, as a conventional plate-like member laminating method and apparatus in which such problems are unlikely to occur, for example, the one described in Patent Document 1 is known, and FIG. 7 is a diagram of the method and apparatus. Show.

  As shown in FIG. 7, the second plate-like member 2 is bonded to the first plate-like member 1, and the second plate-like member 2 is first bonded to the first plate-like member 1. The end of the side to be bonded last and the end of the side to be finally bonded are supported by the lower surface supported by a pillow 3 that can be moved up and down to restrict downward movement. ing. Thereby, it maintains so that the part which has not yet been pressed of the 2nd plate-shaped member 2 and the 1st plate-shaped member 1 may contact, and the 2nd plate-shaped member 2 is accompanying the movement of the roller 5 which is a press means. It will be stuck together while warping.

  Here, as an adhesive layer between the first plate-like member 1 and the second plate-like member 2, a method using a sheet-like adhesive material or a liquid adhesive material is dropped (or applied), and then pressed. There is a way to expand. However, the sheet-like adhesive material is expensive because it undergoes a process of processing the adhesive material into a sheet, and the disposal of the release film or the like is required during use. There is a problem that it is very difficult to simply attach the both sides of the plate-like member 1 and the second plate-like member 2 without air biting. For this reason, a method of spreading and spreading the liquid adhesive material is more desirable for bonding at a lower cost and higher productivity.

  In a method in which such a liquid adhesive material is dropped (or applied) and then spread out, in order to bond together without introducing bubbles, the liquid material 4 in the adhesive material is bonded while being stabilized. It becomes important.

JP 2011-53503 A

  However, in the method of FIG. 7 which is a conventional method, the first plate member 1 and the second plate member 2 are bonded in the direction along the long side (or short side) of FIG. In the bonding process, the width 6 of the liquid reservoir 4 of the adhesive material does not change from the state of the bonding start end portion, as shown in FIG.

  As a result, as shown in FIG. 9, the liquid pool 7 near both ends of the liquid pool width direction receives the resistance of the edge portion 19 of the first plate-like member 1, and the width direction center portion with respect to the advancing direction of bonding. By moving backward, the adhesive material could not be sufficiently spread out, and there was a problem that an unfilled portion 13 of the adhesive material was generated (see FIG. 12).

  Further, the liquid reservoir 8 is also shown in FIG. 9 (the same parts as those in FIG. 7 are denoted by the same reference numerals and a part of the description is omitted) inside the liquid reservoir width direction both ends. 4 is pushed in the laminating direction when the second plate-like member 2 is pressed, but since there is no element to control in the liquid pool width direction with respect to the movement of the liquid pool 4, in the liquid pool width direction, The dispersion of the liquid pool 4 is disturbed by the slight variation in the curvature of the second plate-like member 2, the slight variation in the pressing force, the slight variation in the pasting speed, the variation in the amount of the liquid pool, etc. In the spreading process, a portion having a small amount of liquid pool and a portion having a large amount are locally generated.

  As a result, in the portion where the liquid pool amount is small, the pressure applied to the liquid pool becomes low, which makes it easier for air to entrain between the plate member and the adhesive material, or the first plate member and the second plate shape. When the space between the members could not be sufficiently filled, there were problems such as entrapment of bubbles 12 and generation of unfilled portions 13 of the adhesive material (see FIG. 12).

  In addition, there is also a problem that the protruding portion 14 of the adhesive material is generated in a portion where the amount of liquid pool is locally large. Such a problem becomes more conspicuous in bonding to a large-sized plate-like member in accordance with the enlargement of a desired device in recent years.

  Further, in the method of FIG. 7, a larger force is required to maintain and control the same curvature of the second plate-like member 2 at the pressing position as the bonding residual dimension becomes shorter (the force is constant). This is because the bending moment decreases as the remaining bonding size decreases. Therefore, it is necessary to make the pillow 3 thick enough to withstand a certain load or more. In the case of such a thick pillow 3, the second plate shape as shown in FIG. 10 (the same parts as those in FIG. 7 are denoted by the same reference numerals and the description thereof is omitted). When the member 2 is sufficiently larger than the first plate-like member 1 (with overhang), a certain effect can be obtained.

  However, in recent years, demands for narrowing, thinning, and increasing the size of the devices have been increasing. Therefore, for bonding, the difference in size between the first plate member 1 and the second plate member 2 is made smaller, the thickness of the adhesive layer is made thinner, the first plate member 1 and the second plate member 2 are bonded together. It has been required to make the plate-like member 2 larger.

  Therefore, when the first plate-like member 1 and the second plate-like member 2 having substantially the same size (small overhang) are bonded using the thick pillow 3 as described above, FIG. The same parts as those in FIG. 7 are denoted by the same reference numerals, and a part of the description is omitted. Finally, the pillow 3 is inserted between the first plate member 1 and the second plate member 2. A pulling action is required.

  As a result, the second plate-like member 2 is restored, so that it comes into contact with the first plate-like member 1 before being pressed (FIG. 11 (c)). The position / shape where the liquid pool spreads cannot be controlled at all due to “vibration of 2” or “non-uniform contact in the width direction”. Therefore, as shown in FIG. 12, there is a problem that the bubbles 12 are bitten or the adhesive material is not sufficiently spread over the entire bonding surface, and an unfilled portion 13 and a protruding portion 14 are generated.

  A method using a pillow 9 having a nail shape as shown in FIG. 13 (the nail portion 10 is thinner than the adhesive layer) is also known. However, as the device becomes thinner, the thickness of the adhesive layer is on the order of several tens of microns. The following extremely thin bonding has been demanded, and it has become difficult to achieve a strength that can realize a desired bending moment with the nail portion 10 thinner than the thickness of the adhesive layer.

  Furthermore, when the desired plate-like member is enlarged with the increase in size of the device, the desired bending moment is obtained with the nail portion 10 thinner than the thickness of the adhesive layer with respect to the weight and rigidity of the plate-like member. In order to maintain the curvature uniformly in the width direction, it is necessary to make the claw portion 10 have high processing accuracy, and there are many problems such as high cost of the device. Arise.

  The present invention has been made in view of such problems of the prior art, and is inexpensive and highly productive without the occurrence of air bubbles and the like. For example, the device is made narrower, thinner, and larger. It is an object of the present invention to provide a plate-shaped member bonding method and a plate-shaped member bonding apparatus capable of bonding plate-shaped members that can cope with the above.

In order to achieve the above object, the first present invention provides:
The second plate-like member is pressed against the rectangular first plate-like member by the pressing means, and the adhesive material disposed between the first plate-like member and the second plate-like member is pushed and spread by the movement of the pressing means. A plate-like member laminating method,
As the pressing means is moved relatively toward the corners of the first plate-like member and the adhesive material disposed between the second plate-like member and the first plate-like member is spread out, A plate-like member laminating method, comprising: a step of expanding a pressing portion in which the pressing means presses the first plate-like member via the second plate-like member.

  According to this configuration, for example, the bonding is performed while the width of the liquid pool of the adhesive material formed on the pressing portion is narrowed as the bonding proceeds. As a result, a flow in which the liquid pool always tries to gather to the central portion is generated, and pressure is applied to the liquid pool. By applying this pressure, the liquid reservoir is stabilized and the entrapment of bubbles can be suppressed.

The second aspect of the present invention
A placing step of placing the rectangular first plate-shaped member on the bonding stage;
An arrangement step of arranging the second plate-like member above the first plate-like member;
A filling step of filling an adhesive material between the first plate member and the second plate member;
A pressing step of bending the second plate-like member by the pressing means and pressing the second plate-like member against the first plate-like member, the plate-like member bonding method according to the first aspect of the present invention, is there.

  According to this configuration, for example, the liquid pool in the vicinity of both ends in the width direction of the liquid pool receives the resistance of the edge portion of the plate-shaped member and does not recede from the central portion in the width direction with respect to the advancing direction of bonding. It becomes possible to sufficiently spread the adhesive material to the end or corner of the substrate.

The third aspect of the present invention
The position of the front end portion of the adhesive material liquid pool formed in the region of both end portions of the pressing portion is compared with the position of the front end portion of the adhesive material liquid pool formed in the central region of the press position. The plate-like member laminating method according to the second aspect of the present invention is characterized by being positioned forward with respect to the moving direction of the pressing means.

The fourth aspect of the present invention is
The pressing means has two pressing rollers,
In the spreading step, the two pressing rollers are arranged adjacent to the diagonal of the first plate-like member at the start of spreading and move away from each other after the start of spreading. A method for laminating plate-like members according to the third aspect of the present invention.

The fifth aspect of the present invention provides
The plate-like member laminating method according to the fourth aspect of the present invention, further comprising support means for supporting an end portion of the second plate-like member.

The sixth aspect of the present invention provides
While pressing the second plate-like member against the rectangular first plate-like member by pressing means, and spreading the adhesive material arranged between the first plate-like member and the second plate-like member by moving the pressing means A plate-like member laminating device for laminating,
The pressing means is a means that moves relatively toward the corner of the first plate-like member,
The width of the pressing portion that presses the second plate-shaped member becomes narrower as the adhesive material disposed between the second plate-shaped member and the first plate-shaped member is expanded by the movement. The pressing member is disposed with respect to the first plate member, and is a plate member bonding apparatus.

  According to this configuration, for example, it is possible to perform the bonding while narrowing the width of the pressing portion in the bonding process, and as a result, it is possible to stabilize the liquid pool formed in the pressing portion by applying pressure. Further, when the pressing portion by the pressing means is divided into, for example, five in the width direction, the position of the liquid reservoir tip portion of the adhesive material with respect to the bonding progress direction is more in the two regions at both ends than the three regions in the central portion. The adhesive material can be bonded together while being positioned forward, and the adhesive material can be sufficiently spread to the end and corner of the plate-like base material.

  As described above, according to the plate-like member laminating method and the plate-like member laminating device of the present invention, low-cost and high productivity without the occurrence of entrainment of bubbles, etc., narrowing and thinning of devices It is possible to bond plate-like members that can cope with the increase in size and size.

(A)-(b): The schematic diagram of the plate-shaped member bonding method in Embodiment 1 of this invention, and a plate-shaped member bonding apparatus. (A)-(d): Flow chart of plate-like member bonding method according to Embodiment 1 of the present invention. The figure explaining the change of the width | variety of the press position in the plate-shaped member bonding process in Embodiment 1 of this invention. The figure explaining the flow of the liquid pool of the adhesive material in Embodiment 1 of this invention The figure explaining the position of the liquid pool front-end | tip part with respect to the bonding advancing direction in Embodiment 1 of this invention. The figure explaining the bonding failure state It is a figure (at the time of a bonding start end) of the method and apparatus bonded together to a 1st plate-shaped member, pressing the 2nd plate-shaped member in a prior art, (a) is a top view, (b) is a side view. It is a figure (a bonding intermediate process) of the method and apparatus bonded together to a 1st plate-shaped member, pressing the 2nd plate-shaped member in a prior art, (a) is a top view, (b) is a side view. (A)-(b): It is a figure explaining the problem about the behavior of the adhesive material liquid reservoir part in a prior art, (a) is a top view, (b) is a side view. It is a flowchart of the bonding method in case the 2nd plate-shaped member in a prior art is fully larger than a 1st plate-shaped member (with overhang), (a) is at the time of starting edge part bonding, (b) is At the time of pasting the central part, (c) is a figure at the time of pasting the end part, (d) is a figure at the end of the pasting. It is a flowchart (bonding termination | terminus part) of the bonding method when the 2nd plate-shaped member in a prior art is a magnitude | size equivalent to a 1st plate-shaped member (small overhang), (a) is pillow extraction Before, (b) is when the pillow is removed, (c) is when the second plate-like member is restored, (d) is when the pressing is completed Illustration of poor bonding due to pillow removal Schematic side view of pillow with nail shape

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIGS. 1A and 1B are schematic views of a plate-like member bonding application method and a plate-like member bonding apparatus 100 according to Embodiment 1 of the present invention, and FIG. FIG. 1B is a schematic side view of the apparatus 100. FIG. 2 (a) to 2 (d) are flowcharts of the plate-like member laminating method according to Embodiment 1 of the present invention, where (a) is when the central portion is pressed, and (b) is the central peripheral portion. (C) shows the state at the time of pasting both end portions, and (d) shows the state at the end of the pasting.

  In FIG. 1, first, a rectangular first plate-like member 1 is placed on a bonding stage (not shown) (placement step), and a rectangular first plate-like member positioned vertically above the first plate-like member 1 is placed. Positioning with the two-plate member 2 is performed (arrangement step).

  Next, an adhesive material is filled between the first plate-like member 1 and the second plate-like member 2 by an adhesive supply nozzle (not shown) (filling step).

  And in the state which curved the 2nd plate-shaped member 2 with the press roller 105 which is a press means, supporting the corner | angular parts 2a and 2a of the 2nd plate-shaped member 2 from the lower surface with the pillow 3 which can be raised / lowered. The second plate member 2 is pressed against the first plate member 1 (pressing step). In this state, a liquid reservoir 4 of an adhesive material is formed between the first plate member 1 and the second plate member 2.

  In FIG. 2 (the same parts as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted), two corner portions 2a of the second plate-like member 2 to be finally bonded are thereafter. 2a by lowering the pillow 3 supporting the 2a, and changing the relative position of the roller 105 as the pressing means with respect to the first plate-like member 1 and the second plate-like member 2 in the direction of bonding (FIG. 2B). ) To (d)), the adhesive material applied in advance between the second plate-like member 2 and the first plate-like member 1 is spread and the second plate-like member 2 is attached to the first plate-like substrate 1. Align (push spreading process).

  Further, as shown in FIG. 1, as the pressing means, the two rollers 105 are arranged in the width direction of the pressing portion (pressing force) with respect to any side of the first plate-like member 1 and the second plate-like member 2. The axial direction of the roller 105) is not parallel, and the first plate member 1 and the second plate member 2 are arranged so that "one of the diagonal lines" and "the width direction of the pressing portion" are parallel, Bonding was performed by moving the rollers 105 in different traveling directions by 180 °. That is, the two pressing rollers 105 are configured to move toward the corners 1a and 1a (see FIG. 1A) of the first plate-like member 1, respectively.

  Accordingly, as shown in FIG. 3 (the same parts as those in FIG. 1 are denoted by the same reference numerals and a part of the description is omitted), the width of the pressing part in the bonding process of the two pressing rollers 105 is shown. It becomes possible to bond 11 while gradually changing 11.

  As a result, the width of the liquid pool of the adhesive material formed on the pressing portion is bonded while gradually changing, so that the same reference numerals are given to the same portions as those in FIG. As shown in (some explanations are omitted), a flow 20 is always generated in which the liquid pool tends to gather to the center, and pressure is applied to the liquid pool. By applying this pressure, it is possible to stabilize the liquid reservoir and to suppress the entrapment of bubbles.

  Further, in FIG. 5 (the same parts as those in FIG. 1 are denoted by the same reference numerals and a part of the description is omitted), the pasting is performed when the width of the pressing part is gradually changed. The position of the liquid pool front end portion with respect to the alignment traveling direction is shown.

  According to the present invention, with the progress of the bonding, the width of the liquid pool of the adhesive material is also narrowed. Therefore, in the liquid pools 21 at both ends of the liquid pool width direction, the direction of the bonding progress is performed by pressing the second plate member. The flow path of the pressure-sensitive adhesive material extruded on the surface is blocked. As a result, particularly in the liquid pools 21 at both ends in the liquid pool width direction (the positions of the liquid pools at the both ends in the width direction in FIG. 5 in the bonding progress direction), the gathering of the adhesive material becomes significant, and the bonding progress direction In the liquid reservoir 22 inside the both ends of the liquid pool width direction (see the tip position 16 in the bonding progress direction in the inner area excluding the width end areas in FIG. 5). In comparison, the liquid reservoir is pushed out in the direction of bonding.

  Accordingly, as shown in FIG. 5, when the pressing portion by the pressing roller 105 as the pressing means is divided into five in the width direction (see the five-divided region 30 in FIG. 5), the liquid pool of the adhesive material with respect to the bonding progress direction. With respect to the position of the tip portion, two regions 32 (see FIG. 5) at three ends of the central portion 31 (see the tip position 16 in the bonding progress direction of the inner region excluding the width direction end portion regions in FIG. 5). It is possible to bond the liquid pools at both end regions in the width direction with the liquid reservoirs (see the tip position 15 in the bonding progress direction) positioned forward.

  As a result, due to the influence of the resistance of the edge portion 19 of the plate-like member as shown in FIG. The effect that the adhesive material can be sufficiently spread to the end and corner of the plate-like member can be obtained.

Example 1
The configuration described in the first embodiment will be described in more detail with reference to examples.

  In the present example, bonding was performed using the plate-shaped member bonding method and the plate-shaped member bonding apparatus 100 shown in FIG.

  Here, the first plate member 1 is a liquid crystal display panel, and the second plate member 2 is a touch panel. The liquid crystal display panel has a structure in which liquid crystal is sealed between an array substrate and a color filter substrate, and an upper polarizing plate and a lower polarizing plate are attached to both surfaces thereof. The touch panel has a structure in which a conductive transparent electrode is arranged on a glass substrate. Both of them were bonded so that the upper polarizing plate of the liquid crystal display panel and the transparent electrode side of the touch panel face each other.

  The liquid crystal display panel has a rectangular shape with a size of 370 mm × 470 mm and a thickness of 2.5 mm. The touch panel has a rectangular shape with a size of 380 mm × 480 mm and a thickness of 0.7 mm.

  As the pressure-sensitive adhesive material, an acrylic ultraviolet curable resin having a viscosity of 3500 mPa · s was used, and the adhesive layers were bonded so that the thickness of the adhesive layer upon completion of the bonding was 50 μm.

Here, the two rollers 105 are arranged so as to be parallel to one of the diagonal lines of the liquid crystal panel and the touch panel, and then the directions in which the respective rollers 105 are 180 ° different from each other are set as the bonding progressing direction. By changing the relative position with respect to the panel and the touch panel at 50 mm / s, as the bonding progressed, the width of the pressed portion was narrowed and the adhesive material was spread and bonded. Thereafter, temporary curing under irradiation conditions of 500 mJ / cm ² and main curing under irradiation conditions of 1500 mJ / cm ² were performed.

  Table 1 shows the evaluation results for the occurrence of bubble defects of the 30 samples bonded in this way.

  6 (note that the same parts as those in FIG. 1 are denoted by the same reference numerals and explanations thereof are omitted), those having a bubble diameter of 17 μm or more are not present in the adhesive layer. In the case of “○”, the case of “1” or more is indicated as “X”. Here, the case where there was a region where the width 18 of the region where the pressure-sensitive adhesive material was insufficiently spread was 50 μm or more, or when the protruding portion 14 of the pressure-sensitive adhesive material was generated was indicated as “X”.

  Here, as Comparative Example 1, the same results according to the conventional method shown in FIG. Here, the first plate member 1 of the conventional method is a liquid crystal display panel, and the second plate member 2 is a touch panel. The liquid crystal display panel has a structure in which liquid crystal is sealed between an array substrate and a color filter substrate, and an upper polarizing plate and a lower polarizing plate are attached to both surfaces thereof. The touch panel has a structure in which a conductive transparent electrode is arranged on a glass substrate. Both of them were bonded so that the upper polarizing plate of the liquid crystal display panel and the transparent electrode side of the touch panel face each other.

  The liquid crystal display panel has a rectangular shape with a size of 370 mm × 470 mm and a thickness of 2.5 mm. The touch panel has a rectangular shape with a size of 380 mm × 480 mm and a thickness of 0.7 mm. As the pressure-sensitive adhesive material, an acrylic ultraviolet curable resin having a viscosity of 3500 mPa · s was used, and the adhesive layers were bonded so that the thickness of the adhesive layer upon completion of the bonding was 50 μm.

Here, one roller 5 is disposed at the end of the liquid crystal panel and the touch panel where the first bonding is performed so as to be parallel to the short sides of the liquid crystal panel and the touch panel, and then the last side to be bonded. While lowering the pillow 3 that supports the edge of the roller, the relative position of the roller 105 with respect to the liquid crystal display panel and the touch panel is changed at 50 mm / s, while expanding the adhesive material without changing the width of the pressing part during bonding. Pasted together. Thereafter, temporary curing under irradiation conditions of 500 mJ / cm ² and main curing under irradiation conditions of 1500 mJ / cm ² were performed.

  From Table 1, in Comparative Example 1 using the bonding method according to the conventional method, bonding is performed in the direction along the long sides of the liquid crystal display panel and the touch panel. No change from the situation. As a result, the liquid pool in the vicinity of the liquid pool width direction end receives the resistance of the edge portion of the plate-like member and recedes from the center in the width direction with respect to the advancing direction of bonding, thereby sufficiently It could not be spread out, resulting in an unfilled portion of the adhesive material. In addition, with respect to the portion inside the liquid pool width direction end, the liquid pool is pushed out in the bonding direction when the touch panel is pressed, but the element controls the liquid pool width direction with respect to the movement of the liquid pool Therefore, there is a tendency to spread the liquid pool due to slight variations in the curvature of the touch panel in the liquid pool width direction, slight variations in pressing force, slight variations in the pasting speed, and variations in the amount of liquid pool. It was disturbed, and bubble entrapment and sticking-out / unfilled parts of the adhesive material occurred.

  In addition, the liquid crystal display panel and the touch panel in Comparative Example 1 are comparatively large in size, are approximately equal in size (small overhang), and the thickness of the adhesive layer is thin, so that the wall thickness can withstand a certain load or more. While making a thick pillow, the pillow was pulled out from between the liquid crystal display panel and the touch panel at the end of the bonding process.

  As a result, when the touch panel is restored, it comes into contact with the liquid crystal display panel before pressing, causing "vibration of the touch panel" or "non-uniform contact in the width direction". Thus, the entrapment of bubbles occurred, and the adhesive material could not be sufficiently uniformly spread over the entire bonding surface, resulting in unfilled portions and protrusions.

  On the other hand, in Example 1 using the plate-shaped member bonding method of the present invention, bonding was performed while the width of the liquid reservoir of the adhesive material formed on the pressed portion was narrowed as the bonding progressed.

  As a result, in the pasting process, there is always a flow in which the liquid pool is likely to gather to the center, and pressure is applied to the liquid pool, so that the liquid pool can be stabilized and air bubbles are bitten. I was able to suppress the inclusion.

  In addition, as the pasting progresses, the width of the liquid reservoir of the adhesive material also becomes narrower. Therefore, the flow path of the adhesive material extruded in the pasting progress direction by pressing the touch panel is blocked at both ends of the liquid pool in the width direction. It will come off. As a result, the gathering of the adhesive material becomes remarkable particularly at both ends in the width direction of the liquid pool, and the liquid pool is pushed out in the bonding progress direction.

  Thereby, when the pressing part by the pressing roller 105 which is a pressing means is divided into five in the width direction (refer to the five-divided region 30 in FIG. 5), the center of the position of the liquid reservoir front end portion of the adhesive material with respect to the bonding progress direction 3 regions 31 (refer to the tip position 16 in the bonding progress direction of the inner region excluding the width direction both end regions in FIG. 5) and the two regions 32 (the width direction both end regions in FIG. 5). The liquid pool can be bonded while the front side (see the tip position 15 in the bonding progress direction) is positioned forward.

  As a result, it is possible to sufficiently spread the adhesive material to the end and corner of the plate-like member without retreating the liquid pool with respect to the resistance of the edge of the plate-like member in the advancing direction of bonding. It became possible.

  Here, in Embodiment 1, the pressing roller 105 is used as the pressing unit. However, any unit that can press the desired width with the desired pressure and can change / control the relative position with the plate-like member may be used. , Including but not limited to form and number.

  Further, in the first embodiment, the pressing roller 105 as the pressing means is arranged so that “one of the diagonal lines” and “the width direction of the pressing portion” of the first plate member and the second plate member are parallel to each other. However, the same effect can be obtained if the width direction of the pressing portion (the axial direction of the pressing roller 105) is not parallel to any side of the first plate-like member 1 and the second plate-like member 2. It is not limited to this.

  In the above embodiment, the first plate-like member 1 is placed on the bonding stage and is aligned with the second plate-like member 2 positioned above the first plate-like member 1 in the vertical direction. After that, the case where the adhesive material is filled between the first plate-like member 1 and the second plate-like member 2 by the adhesive supply nozzle has been described. However, the present invention is not limited to this. For example, it is placed on the bonding stage. After the adhesive material is supplied to the first plate-like member 1, the second plate-like member 2 may be arranged above the first plate-like member 1 for alignment.

  Moreover, in the said embodiment, although the structure which uses the two press rollers 105 as an example of the press means of this invention was demonstrated, not only this but the structure provided with one press roller may be sufficient, for example. In the case of this configuration, one pressing roller is arranged on the diagonal line of the first plate member 1, the first plate member 1 is pressed from above the second plate member 2, and then the first plate member 1 is pressed while pressing. The first plate-like member 1 moves toward one corner (see the corner 1a in FIG. 1A) of the one plate-like member 1 and moves in the opposite direction after the movement to one corner is completed. It is good also as a structure which returns to the position on 1 diagonal, and moves toward the other corner | angular part (refer corner 1a of Fig.1 (a)) of the 1st plate-shaped member 1 after that, pressing. In addition, when combined with the configuration in which the bonding stage is rotated by 180 °, the configuration is such that the pressing roller is moved again in the same direction after moving in the opposite direction and returning to the position on the diagonal line of the first plate-like member 1. What should I do?

  Moreover, in the said embodiment, although it was the structure which moves the press roller as a press means, it is not only this, For example, it is the structure to which a bonding stage moves only by moving a press means to an up-down direction. Also good.

  According to the plate member laminating method and the plate member laminating apparatus of the present invention, it is possible to cope with narrowing, thinning, and enlarging of a device, without causing bubbles and the like, and at low cost and productivity. In addition to the display field such as a liquid crystal display device and an organic EL display device, it is suitable for manufacturing applications such as a surface emitting device represented by organic EL lighting.

DESCRIPTION OF SYMBOLS 1 1st plate-shaped member 2 2nd plate-shaped member 3 Pillow 4 Liquid reservoir of adhesive material 5 Roller 105 Pressing roller (pressing means)
6 Width of the liquid pool of adhesive material 7 Liquid pool near the end of the liquid pool width direction (liquid pool retreated from the center with respect to the bonding direction)
8 Reservoir on the inner side of the end of the sump width direction
9 Pillow with Claw Shape 10 Claw Part 11 Width of Pressed Part 12 Bubble 13 Unfilled Part of Adhesive Material Insufficiently Expanded 14 Adhesive Material Extruded Part 15 Bonding Progression Direction of Liquid Pools at Both Ends of Width Direction Tip position 16 of the inner region excluding both end regions in the width direction, tip position in the direction of bonding 17 bubble diameter 18 width of the region where the adhesive material is insufficiently spread 19 edge portion of the plate-like member 20 liquid Flow in which the pool tends to gather to the central part 21 Liquid pools at both ends of the liquid pool width direction in the first embodiment of the present invention 22 Liquid pools inside the both ends of the liquid pool width direction in the first embodiment of the present invention

Claims (6)

The second plate-like member is pressed against the rectangular first plate-like member by the pressing means, and the adhesive material disposed between the first plate-like member and the second plate-like member is pushed and spread by the movement of the pressing means. A plate-like member laminating method,
As the pressing means is moved relatively toward the corners of the first plate-like member and the adhesive material disposed between the second plate-like member and the first plate-like member is spread out, A plate-like member bonding method, comprising: a step of expanding the width of a pressing portion where the pressing means presses the first plate-like member via the second plate-like member. A placing step of placing the rectangular first plate-shaped member on the bonding stage;
An arrangement step of arranging the second plate-like member above the first plate-like member;
A filling step of filling an adhesive material between the first plate member and the second plate member;
The plate-like member bonding method according to claim 1, further comprising: a pressing step of bending the second plate-like member by the pressing means and pressing the second plate-like member against the first plate-like member.   The position of the front end portion of the adhesive material liquid pool formed in the region of both end portions of the pressing portion is compared with the position of the front end portion of the adhesive material liquid pool formed in the central region of the press position. The plate member bonding method according to claim 2, wherein the plate member is positioned forward with respect to the moving direction of the pressing means. The pressing means has two pressing rollers,
In the spreading step, the two pressing rollers are arranged adjacent to the diagonal of the first plate-like member at the start of spreading and move away from each other after the start of spreading. The method for laminating a plate-like member according to claim 3.   The plate member bonding method according to claim 4, further comprising a supporting unit that supports an end portion of the second plate member. While pressing the second plate-like member against the rectangular first plate-like member by pressing means, and spreading the adhesive material arranged between the first plate-like member and the second plate-like member by moving the pressing means A plate-like member laminating device for laminating,
The pressing means is a means that moves relatively toward the corner of the first plate-like member,
The width of the pressing portion that presses the second plate-shaped member becomes narrower as the adhesive material disposed between the second plate-shaped member and the first plate-shaped member is expanded by the movement. The plate member laminating apparatus, wherein the pressing means is arranged with respect to the first plate member.