JPH07232851A - Tape affixing device - Google Patents

Abstract

PURPOSE:To affix a tape member which consists of an aerotropic conductive sheet and a paper base onto a transparent base plate smoothly by maintaining it in a properly tensed condition. CONSTITUTION:A tape member 5 is given a prescribed tension by delivering the tape member 5 from a feeding reel 10, drawing it with a delivery roller 12, making a prescribed length of the tape member 5 stocked in a stocking part 14, and generating an attracting force in the stocking part 14 by applying negative voltage through an attracting passage. The free end of the tape member 5 which has been delivered from the stocking part 14 is pushed against the surface of a transparent base plate 1 and rotated by a affixing roller 21 which is disposed at a position on the upstream side of a chucking means 20 when viewed from its flowing direction. As a result, the tape member 5 is affixed onto the transparent base plate 1, completely eliminating the risks that excessive tension may be applied along the entire running route of the tape member 5 or a crease may be generated. It is thus possible to affix the tape member 5 smoothly and accurately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sticking a tape member made of an anisotropic conductive sheet on an electrode provided on a transparent substrate constituting a liquid crystal in a liquid crystal manufacturing process. .

[0002]

2. Description of the Related Art In manufacturing a liquid crystal constituting a liquid crystal display, a tab member is connected to an electrode provided on a transparent substrate forming the liquid crystal display. An anisotropic conductive sheet is used to connect the tab member. This anisotropic conductive sheet has both sides with adhesive surfaces, and it is attached to a transparent substrate.
A tab member is attached on top of it.

[0003]

When the anisotropic conductive sheet is attached to the transparent substrate, the anisotropic conductive sheet must be attached with a predetermined tension. If the tension is insufficient, there is a problem that wrinkles are generated at the time of attachment, bubbles are generated, or the like, resulting in poor contact with the electrodes of the transparent substrate. On the other hand, if the tension is too high, the anisotropic conductive sheet will be stretched, so that the density of the conductor powder may change, which may cause contact failure.

The present invention has been made in view of the above points, and it is an object of the present invention to smoothly attach an anisotropic conductive sheet to a transparent substrate with appropriate tension. Is to be able to.

[0005]

In order to achieve the above-mentioned object, the apparatus of the present invention comprises an anisotropic conductive sheet having adhesive surfaces on both sides, and a backing sheet attached to the anisotropic conductive sheet. A feed roller for pulling out the tape member from the supply reel and adhering it to a transparent substrate forming a liquid crystal by a sticking roller, and for adsorbing and pulling out the mount side of the tape member from the supply reel. A stock part for stocking a tape member of a predetermined length sent from the feed roller, a tension applying means for giving a predetermined tension to the tape member in the stock part, and a tip of the tape member sent out from the stock part. By chucking the chucking means and the tape member by rolling on the surface of the transparent substrate at a position upstream of the chucking means in the flow direction, It is an its characterized by being configured the-loop member and a pasting roller pasted on a transparent substrate.

[0006]

[Function] The anisotropic conductive sheet has adhesive surfaces on both sides, but when it is attached to a transparent substrate, a mount is attached on one side and the opposite side is attached. The tape member becomes an adhesive surface, and the adhesive surface side is attached to the transparent substrate. The tape member is supplied from the supply reel, and the supplied tape member is first sent to the stock section.
If too much force is applied to the tape member in sending it to the stock portion, the sheet will be stretched. Also, when feeding the sheet to the stock section, it is necessary to avoid touching the adhesive surface. From the above, by using a feed roller that sucks the backing side by negative pressure and winding the feed roller at a predetermined angle, it is possible to exert a sufficient feed force only by applying a weak force to the tape member. Become.

When attaching the tape member, it is necessary to maintain a state in which the tape member has a predetermined tension. In order to generate this tension, a tension applying means is provided in the stock portion and feeding by a feed roller is performed. Completely separates to generate the required tension in the stock.

Although the tape member is pulled out from the stock portion by the chuck means, the tape member is held in a state of having a predetermined tension by the tension applying means. In this state, the sticking roller is displaced in the direction of the transparent substrate to bring the tape member into pressure contact with the transparent substrate with a predetermined pressing force. Then, the sticking roller and the transparent substrate are relatively moved to roll the sticking roller, and the sticking force acting on the tape member at that time allows the sticking roller to stick to the transparent substrate. As described above, by adhering the tape member with a proper tension, wrinkles, bubbles and the like are not generated. Above all,
Even if air is present between the tape member and the transparent substrate by forming the sticking roller with an elastic member having an arcuate surface whose outer peripheral surface is convex at the center, this tape member is The central portion in the width direction first comes into contact with the transparent substrate, and the transparent substrate comes into contact with the left and right side portions so as to be spread, so that no bubbles are included between them.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 is a transparent substrate that constitutes a liquid crystal, and an electrode 1a is provided outside the display area on the surface of the transparent substrate 1, and both surfaces are adhesive surfaces on this electrode. The anisotropic conductive sheet 2 is attached. Then, the electronic component 3a is further mounted on the anisotropic conductive sheet 2, and the tab member 3 on which a required wiring pattern is formed is superposed on the anisotropic conductive sheet 2, and a predetermined pressing force is applied to the transparent substrate 1. The electrode 1a and the electrode 3b on the tab member 3 side are electrically connected via the anisotropic conductive sheet 2. In the step of mounting the tab member 3, first, the anisotropic conductive sheet 2 is attached to a predetermined position of the transparent substrate 1, and the anisotropic conductive sheet 2 is used.
When the tape member 5 is attached, the tape member 5 in which the mount 4 is attached to one side surface thereof is used, and the tape member 5 is attached to the transparent substrate 1.

For this purpose, the tape sticking device shown in FIG. 2 is used. In the figure, 10 indicates a supply reel of the tape member 5, and the tape member 5 supplied from the supply reel 10 is wound around a delivery roller 12 at a predetermined angle by a pair of guide rollers 11a and 11b. Is driven to be fed into the stock portion 14 via the guide roller 13. The tape member 5 having a predetermined length is stocked in the stock unit 14, and the tape member 5 stocked in this way is sent out from the stock unit 14 via the guide roller 15. ing. Further, one or a plurality of guide rollers 16 are arranged on the downstream side, and the guide roller 1
A discharging roller 17 is provided on the downstream side of 6. The guide roller 1 is provided downstream of the static elimination roller 17.
8 and 19 are provided.

The tape member 5 sent out from the guide roller 19 has its tip end chucked by the chucking means 20 and pulled out by a predetermined length. A sticking roller 21 is provided at a portion where the tape member 5 is pulled out, and the sticking roller 21 rolls while the tape member 5 is pressed against the transparent substrate 1 to roll the tape member 5. 5 is attached to the transparent substrate 1. Further, in the figure, 22 is a cutter member, and 23 is a holding member for the tape member 5.

The delivery roller 12 delivers the tape member 5 from the supply reel 10, but since the back tension changes depending on the winding diameter of the tape member 5 on the supply reel 10 and the like, the delivery roller 12 is provided.
In this case, the tape member 5 is pulled out from the supply reel 10 in a state where it is not extended and the function of feeding the tape member 5 to the stock portion 14 is exerted. Therefore, the delivery roller 12 has the configuration shown in FIGS. 3 and 4.

In the drawing, reference numeral 30 denotes a rotating wheel, which is a cup portion 30a and a shaft portion 3.
0b, and a number of suction holes 31 penetrating in the thickness direction of the cup portion 30a are formed at a predetermined pitch. A gear 32 is fixedly provided on a shaft portion 30b connected to the cup portion 30a, and the gear 32 meshes with a drive gear 34 of a motor 33. Rotating wheel 3
The fixed body 35 is inserted through 0. This fixed body 35
Is composed of a circular portion 35a and a rod portion 35b, the circular portion 35a slidably contacts the inner surface of the cup portion 30a, and the rod portion 35b is inserted inside the shaft portion 30b. here,
The circular portion 35a of the fixed body 35 has a groove 36-shaped passage 36 formed at a predetermined angle on the outer peripheral surface thereof, that is, approximately 270 ° in the drawing, and the suction passage 37 is formed in the rod portion 35b.
Has been drilled. A plurality of communication passages 38 are radially provided from the suction passage 37, and the communication passages 38 open to the passage 36. The suction passage 37 is connected to a negative pressure source (not shown), so that the suction holes 31 provided in the rotating wheel 30 generate a suction force by negative pressure when communicating with the passage 36 during the rotation. .

The guide rollers 11a and 11b are for winding the tape member 5 around the delivery roller 12 by a predetermined angle, whereby the tape member 5 has an angle slightly larger than the angle at which the mount 4 side forms the passage 36. It is only wound around the delivery roller 12 and sucked and held by the suction hole 31. Then, when the rotating wheel 30 of the delivery roller 12 is rotated in this state,
The tape member 5 can be pulled out from the supply reel 10. By thus adsorbing and holding the tape member 5 at a large angle by the delivery roller 12, the tape member 5 can be pulled out without applying a strong force locally, and there is no possibility that the tape member 5 will be extended at the time of pulling out.

The stocking section 14 is for stocking the tape member 5 pulled out from the supply reel 10 by the feeding roller 12 by a predetermined length, and has the structure shown in FIGS. 5 to 7. There is. In the figure, 40 is a base plate, 41 and 41 are guide columns, 42 is transparent glass, and 43 is a glass pressing plate. A step is provided on the surface of the base plate 40, and the elevated portion becomes the tape guide surface portion 40a. The pair of guide columns 41 are provided so as to sandwich the tape guide surface portion 40a. Further, the guide column 41 is provided with a step portion 41 a, and the transparent glass 42 is incorporated so as to contact the step portion 41 a so that the inside can be viewed through the transparent glass 42. This transparent glass 42
The stock portion 14 is assembled by interposing the spring 44 between the glass pressing plate 43 and the glass pressing plate 43, and screwing the screw 45 from the glass pressing plate 43 to the base plate 40 via the guide strut 41. The upper side of the stock portion 14 is open, the side portions are closed by the guide columns 41, and the lower side is closed by the ridges 40b provided at the lower end of the tape guide surface portion 40a of the base plate 40. A space 14a is formed. The stock space 14a has a width slightly wider than the width of the tape member 5 and has a depth such that the tape member 5 can be stocked several times as long as the sticking length of the tape member 5 to the transparent substrate 1.

The tape member 5 is drawn into the stock portion 14 at a portion between the guide rollers 13 and 15. In order to apply this pulling force, the base plate 4
A suction passage 46 is formed at a position below the portion where the protrusion 40b of 0 is formed, and a plurality of communication holes 47 are formed in the protrusion 40b. A suction force for drawing the member 5 into the stock space 14a of the stock portion 14 is generated.
Stock space 1 formed by the guide columns 41, 41
By making the width of 4a slightly larger than the width of the tape member 5, the suction passage 46 is connected to a negative pressure source, and the stock space 14a is connected from this suction passage 46 via the communication hole 47.
When the tape member 5 is brought into a negative pressure state, the tape member 5 becomes substantially circular and comes into contact with the guide column 41. Therefore, the tape member 5 becomes a movable partition wall, and the lower portion of the tape member 5 is sucked by negative pressure. It is kept in a predetermined tension by force. The suction passage 46 and the communication hole 47 form a tension applying means for applying a constant tension on the downstream side in the feeding direction of the tape member 5. Since the adhesive surface of the tape member 5 faces the guide column 41, the distance between the guide rollers 13 and 15 can be reduced by making the gap between the guide rollers 13 and 15 smaller than the lengthwise dimension of the upper end opening of the stock portion 14. The contact portion of the tape member 5 with the guide column 41 comes into contact with the area below the stock space 14a with the smallest possible area.

Stock space 14 in stock section 14
The tape member 5 drawn into the inside of a and stocked is such that ion wind is blown in the path from the guide roller 16 to the charge eliminating roller 17, as shown by the arrow in FIG. Furthermore, this static elimination roller 1
By setting 7 to the ground potential, the charged tape member 5 is discharged by the path so far.

The tape member 5 running through the static elimination roller 17 is turned around by the guide roller 18 and further wound around the guide roller 19, the free end of which is the chuck means 2.
It is designed to be chucked by 0. By this chuck means 20, the tape member 5 is pulled out by the length of the sticking to the transparent substrate 1. Therefore, as shown in FIG. 8, the chuck means 20 is composed of a roller 50 and a movable plate 51, and the movable plate 51 is displaced by an air cylinder 52 in a direction of approaching / separating from the roller 50. ing. This chuck means 20 has its roller 5
The tape member 5 is chucked between 0 and the movable plate 51,
In the parallel direction of the transparent substrate 1, the transparent substrate 1 can be moved by an interval corresponding to one attachment length. Therefore, the chuck means 20 is mounted on a slide block 53, and the slide block 53 can be slid and displaced by a forward / reverse rotation motor (not shown). Thus, by using the roller 50 for the chuck means 20, when the tape member 5 is attached to the transparent substrate 1, the tip end portion of the tape member 5 can be easily separated from the chuck means 20.

Chucked by the chuck means 20,
As a sticking roller 21 for sticking the tape member 5 pulled out by a length corresponding to the sticking length to the transparent substrate 1 to the surface of the transparent substrate 1, as shown in FIG. Having a support shaft 60 that is displaceably supported,
A roller 62 made of conductive rubber is fitted to the support shaft 60 via a bearing 61. The cross section of the roller 62 is an arc surface 62a having a convex shape at the center. With this configuration, the tape member 5 has the arc surface 6 of the roller 62 in the attaching roller 21.
The most projecting central portion of 2a first comes into contact with each other, and is brought into surface contact by being spread laterally by the pressing force. As a result, even if air is present between the tape member 5 and the transparent substrate 1, this air will not be absorbed by the tape member 5.
Will be discharged from the side,
It is attached in a state that it does not contain bubbles.

The tape member 5 is attached to the transparent substrate 1 as described above, but the end portion of the tape member 5 must be cut. Therefore, a cutter 22 including an upper blade 22a and a lower blade 22b is provided at the front position of the guide roller 19, and the tape member 5 is cut between the cutter 22 and the guide roller 19. After that, in order to hold the free end portion thereof, a holding member 23 including a pair of clampers 23a and 23b that come close to and away from each other is provided. The holding member 23 is separated from the cutter 22 by a predetermined distance, and the distance is such that the free end portion of the tape member 5 after the chuck means 20 has cut the roller 50 and the movable plate 51.
This is to have an extra length so that it can be clamped between and.

Thus, the transparent substrate 1 is set on a carrier table 72 mounted on, for example, a ball screw feeding mechanism 70 via a position fine adjustment mechanism 71. First, by recognizing the alignment mark 1b provided on the transparent substrate 1 by using, for example, an image recognizing means, the position fine adjustment mechanism 71 is driven to finely adjust the position in the XY directions (and the rotation direction). Then, while the transport table 72 is being moved by the ball screw feeding mechanism 70, the adhesive surface of the anisotropic conductive sheet 2 forming the tape member 5 is attached to a predetermined position using a tape attaching device.

In the tape sticking device, the tape member 5 is previously fed from the supply reel 10 to the guide rollers 11a and 11b.
Is guided by the feed roller 12 and is wound around the feed roller 12 by a predetermined angle.
The guide roller 15, the guide roller 16, and the guide roller 16 are stored in the stock space 14a of 4 for a predetermined length.
After passing through the static elimination roller 17, it is guided around by the guide rollers 18 and 19, and its free end is chucked by the chuck means 20. And the chuck means 2
0 is arranged at a position where the tape member 5 is pulled out from the guide roller 19 by the length of the sticking to the transparent substrate 1.

Therefore, when the transparent substrate 1 is placed at a predetermined position, the sticking roller 21 is lowered to bring the tape member 5 into contact with the transparent substrate 1, and a predetermined pressing force is applied by the sticking roller 21. Add. As a result, the sticking roller 21 rolls and the tape member 5 is stuck on the transparent substrate 1. In this state, the transparent substrate 1 is first shown in FIG.
By moving the tape member 5 to the left and releasing the chuck of the tape member 5 by the chucking means 20 to attach the portion up to the free end of the tape member 5 to the transparent substrate 1 and then to the right. , Transparent substrate 1
Then, the tape member 5 is attached to the entire area. Then, the transparent substrate 1 is once stopped at a position immediately before the tape member 5 is completely attached. In this state, the cutter member 22 is operated to cut the tape member 5, and the holding member 23 cuts the tape member 5 into a free state and clamps the vicinity of the end of the tape member 5 to be attached next. After that, the transparent substrate 1 is moved again so that the tape member 5 is completely attached to the transparent substrate 1.

When the attachment of the tape member 5 is completed as described above, the upper blade 22a and the lower blade 22b constituting the cutter member 22 are separated from each other and the attaching roller 21 is raised. In this state, the chuck means 20 is brought close to the holding member 23, and the free end of the tape member 5 held by the holding member 23 is chucked. Then, by releasing the clamp of the tape member 5 by the holding member 23 and returning the chuck means 20 to the original position, the operation for attaching the tape member 5 to the next transparent substrate 1 can be started. It becomes a state.

By the way, when the tape member 5 is adhered to the transparent substrate 1, it is necessary to hold the tape member 5 with a certain tension in order to prevent the occurrence of wrinkles. However, if the tension is made too large, the anisotropic conductive sheet 2 will be elongated and the density of the conductive powder uniformly dispersed in the anisotropic conductive sheet 2 will change. For this purpose, the tape roller 5 is moved from the guide roller 19 to the chuck means 2.
It is necessary to maintain the part up to 0 in a predetermined tension state. To this end, the stock space 14 of the stock section 14
A is divided into two upper and lower space portions by the tape member 5, and the lower space portion is in a negative pressure state by a suction passage 37 as a tension applying means. Therefore, this suction force causes the tape member 5 to move to the stock portion 1.
A force acts in the direction of being pulled into 4, so that an appropriate tension can be generated, and the anisotropic conductive sheet 2 does not stretch at the time of sticking, and the entire surface is surely secured. By contacting the transparent substrate 1, it is possible to surely prevent the occurrence of a situation such as wrinkles or bubbles.

The stock portion 14 stocks a length of the tape member 5 which is affixed a plurality of times. For this purpose, the feeding roller 12 moves the tape member 5 from the supply reel 10 to the stock member 14.
I try to pull out. When an excessive force is applied to the tape member 5 when the tape member 5 is pulled out by the delivery roller 12,
After all, elongation will occur. Further, since the tape member 5 is pulled, it is not preferable to bring the tape member 5 into contact with the adhesive surface of the tape member 5 because an adhesive substance adheres to the surface of the delivery roller 12. However, the delivery roller 12 exerts a suction force by negative pressure on the backing sheet 4 side of the tape member 5 to hold the adhesive surface side in a non-contact state, and the delivery roller 12 covers the tape member 5 over a considerably large angle. Since the tape member 5 is wound around the tape member 5, the tape member 5 can be smoothly pulled out, and the tape member 5 is not stretched in the meantime. Here, by making the outer diameter of the delivery roller 12 considerably larger than the outer diameter of the gear 32, the load on the tape member 5 can be further reduced.

While the tape member 5 travels, it slides on other members at various places, so that it is charged with static electricity. Since the ionizing air is supplied and the charge eliminating roller 17 is interposed, most of the static electricity is removed before the attachment. However, when the tape member 5 is attached to the transparent substrate 1, the attaching roller 21 rolls on the tape member 5, so that static electricity may be charged even at this stage. However, the sticking roller 2
Since the roller 62 constituting No. 1 is formed of a conductive member and has a ground potential, static electricity can be almost completely removed.

Further, the sticking roller 21 is stuck to the transparent substrate 1 by applying a pressing force to the tape member 5, and the sticking roller 21 is made of rubber having elasticity. Since the central portion has the arcuate surface 62a formed in the most arcuate shape, the sticking roller 21 first comes into contact with the tape member 5 at the most projecting portion of the arcuate surface 62a. As the force increases, the abutting portion expands to the left and right in the width direction. Therefore, even if air is present between the tape member 5 and the transparent substrate 1, this pressing force causes the air to be pushed out to the left and right sides of the tape member 5 and discharged. As a result, there is no inconvenience that bubbles or the like are generated when the tape member 5 is attached.

[0029]

As described above, according to the present invention, the tape member pulled out from the supply reel by the feed roller is stocked in a stock portion of a predetermined length, and a predetermined tension is applied to the stock member by the tension applying means. The tape member sent out from the stock portion is pressed against the surface of the transparent substrate by a sticking roller at a position on the upstream side of the chuck means in the flow direction of the tape member and rolled to make the tape member transparent. Since it is configured to be pasted on the substrate, the tape member can be pasted smoothly and accurately, completely eliminating the possibility that excess tension will be applied to the entire traveling path of the tape member and wrinkles will occur. There is an effect such as being able to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a process of mounting a tab member on a transparent substrate.

FIG. 2 is an overall configuration diagram of a tape sticking device.

FIG. 3 is an exploded perspective view of a delivery roller.

FIG. 4 is a cross-sectional view of a delivery roller in an assembled state.

FIG. 5 is an exploded perspective view showing a configuration of a stock section.

FIG. 6 is a vertical sectional view of a stock section.

FIG. 7 is a cross-sectional view of a stock section.

FIG. 8 is a structural explanatory view of chuck means.

FIG. 9 is a cross-sectional view of a sticking roller.

[Explanation of symbols]

 1 Transparent Substrate 2 Anisotropic Conductive Sheet 4 Mount 5 Tape Member 10 Supply Reel 12 Feeding Roller 14 Stock Section 20 Chuck Means 21 Sticking Roller 22 Cutter Member 30 Rotating Wheel 31 Suction Hole 35 Fixed Body 36 Passage 37 Suction Passage 38 Communication Passage 40 Base Plate 41 Guide Strut 42 Transparent Glass 43 Glass Holding Plate 46 Suction Passage 47 Communication Hole 60 Support Shaft 62 Roller 62a Arc Surface 70 Ball Screw Feed Mechanism 72 Transport Platform

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunio Yukata 2-6-2, Otemachi, Chiyoda-ku, Tokyo Inside Nitrate Electronics Engineering Co., Ltd.

Claims (7)

[Claims] 1. An anisotropic conductive sheet having adhesive surfaces on both sides and a backing paper attached to the anisotropic conductive sheet, and a tape member having an adhesive surface on one side is pulled out from a supply reel, and liquid crystals are formed by an application roller. A stock for sticking to a transparent substrate, which stocks a feed roller for adsorbing and pulling out the mount side of the tape member from the supply reel, and a tape member of a predetermined length sent from the feed roller. Section, tension applying means for applying a predetermined tension to the tape member in the stock section, chucking means for chucking the tip of the tape member fed from the stock section, and the tape member upstream of the chucking means in the flow direction. And a sticking roller that sticks the tape member on the transparent substrate by rolling it against the surface of the transparent substrate at the side position. A tape sticking device characterized in that 2. The feed roller is composed of a rotating wheel and a fixed body with which the rotating wheel is in sliding contact, and a plurality of suction holes are formed on the outer peripheral surface of the rotating wheel. The tape sticking device according to claim 1, wherein only the negative pressure source and the winding portion of the tape member communicate with each other. 3. The stock portion has a stock space having an opening at the upper end and having a width slightly wider than the width of the tape member, and accommodates a predetermined length of tape member from above the stock space. The tape applying device according to claim 1, wherein the tension applying means is configured to exert a suction force by a negative pressure from below the stock space. 4. The sticking roller is configured to be displaceable in a direction of approaching or separating from a transparent substrate, and configured to move the transparent substrate in a horizontal direction.
The tape sticking device described. 5. The tape sticking apparatus according to claim 1, wherein the sticking roller is formed of an elastic member having an arcuate surface whose outer peripheral surface has a convex shape at the center. 6. The tape sticking device according to claim 1, wherein the sticking roller is made of conductive rubber and is held at a ground potential. 7. The chucking means comprises a lower roller and an upper clamp member which comes into contact with and separates from the lower roller for chucking the tip end of the tape member. Tape sticking device.