JP3886266B2 - ACF sticking device for liquid crystal display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ACF adhering device for a liquid crystal display panel. More specifically, the present invention relates to an ACF adhering device for a liquid crystal display panel in which ACF can be adhered in series to each terminal portion of a plurality of liquid crystal display panels. It is about.
[0002]
[Prior art]
ACF (Anisotropic Conductive Film) is an electroconductive fine particle dispersed in a thermoplastic or thermosetting resin film. Conductive in a single direction (thickness direction) by thermocompression bonding. Sex is expressed.
[0003]
In the field of liquid crystal display panels, it is used to collectively connect an extraction electrode group formed in a terminal portion and an electrode group of a printed circuit board such as a TCP (Tape Carrier Package). FIG. A state in which the tape body 2 made of ACF is stuck on the terminal portion 1a of the panel 1 is shown.
[0004]
[Problems to be solved by the invention]
Conventionally, since this tape application is performed manually for each panel, not only man-hours are required, but also the accuracy of the attachment position is likely to vary, and the reliability of electrical connection may be lacking. It was.
[0005]
In addition, it is ideally affixed straight and with a constant tension. However, since it is a manual operation in reality, it is strongly stretched and pasted as shown exaggeratedly in FIG. (See section A), sometimes attached in a loose state (see section B).
[0006]
In the stretched portion, the contact area is insufficient. On the other hand, air bubbles may be generated inside the part pasted with looseness, which causes a leak.
[0007]
The present invention has been made to solve such a problem, and its object is to collectively place an ACF tape body with a constant tension with respect to each terminal portion in a state where a plurality of liquid crystal display panels are arranged. Another object of the present invention is to provide an ACF adhering device for a liquid crystal display panel that can be attached in a manner.
[0008]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a ACF attaching apparatus of a liquid crystal display panel is adhered to a series of tape body made of ACF (anisotropic conductive film) to the terminals of the plurality of liquid crystal display panels, A plurality of liquid crystal display panels each having a terminal surface aligned in the same direction and a table having an alignment surface; a tape holding means for holding the tape body; and the tape body while pulling out the tape body from the tape holding means. and attaching head attached to its respective terminal portion travels on each of the terminal portions, the same attached head includes a head support means for movably supported relative to the table, said head support means A first guide means parallel to the alignment surface of the table, a main substrate moving along the first guide means, and a second guide provided on the main substrate so as to be orthogonal to the first guide means. And a sub-substrate that moves along the second guide means, and the sub-substrate supports the adhering head, and the adhering head is interposed between the sub-substrate and the adhering head. An elastic means for biasing toward the table side is interposed .
[0009]
According to the present invention, the head support means is provided on the main substrate so as to be orthogonal to the first guide means parallel to the alignment surface of the table, the main substrate moving along the first guide means, and the first guide means. and a sub-board to move was along the second guide means and the second guide means, by the sub-substrate is stuck heads are supported, it is possible to precisely control the movement of the bonded wear head .
[0010]
Between the auxiliary substrate and the attached head, by elastic means for urging the same stuck head table side is interposed, the contact pressure of the attached head relative ends of the terminal portions uniform Can be. For the same reason, it is preferable that the sub-board is provided with stopper means for regulating the movement stroke of the sticking head.
[0011]
Moreover, the aspect which connects a sticking head to a negative pressure source and makes the surface which opposes the terminal part of the sticking head into the negative pressure adsorption surface of a tape body is also contained in this invention. In this case, by forming a negative pressure suction groove on the negative pressure suction surface along the traveling direction of the sticking head, the tape body can be held with an appropriate suction force.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The invention will now be described in more detail by means of the embodiments shown in the drawings. FIG. 1 is a front view of an ACF adhering apparatus according to this embodiment, FIG. 2 is a sectional view of an essential part thereof, and FIG. 3 shows a table of the apparatus as a perspective view.
[0013]
This ACF adhering apparatus is roughly divided into a table 10 for aligning a plurality of liquid crystal display panels 1, an adhering head 20 disposed on the table 10, and a predetermined direction supporting the adhering head 20. It is comprised from the support means 30 to which it moves to.
[0014]
As is well shown in FIG. 3, the table 10 includes a sturdy base 11 installed substantially horizontally. On the base 11, a block member 12 having a panel alignment surface 121 for placing a plurality of (six in this embodiment) liquid crystal display panels 1 in a horizontal row is placed.
[0015]
A side block 122 having a height higher than the panel alignment surface 121 is attached to one side edge of the block member 12. The height of the side block 122 may be about the thickness of the liquid crystal display panel 1. Further, a stopper block 123 is disposed on one side (left end in FIG. 3) of the panel alignment surface 121.
[0016]
The side block 122 is a ruler block, and by aligning the terminal portions 1a of the liquid crystal display panels 1 to the side block 122, the six liquid crystal display panels 1 can be accurately arranged in a horizontal row with the terminal portions 1a in the same direction. Can be arranged.
[0017]
The support means 30 includes a horizontal guide beam 31 as a first guide means arranged in parallel with the panel alignment surface 121 at a predetermined height position on the table 10, and the main substrate 32 is provided on the horizontal guide beam 31. Is slidably mounted. As shown in FIG. 2, the main board 32 is provided with vertical guide rails 321 as second guide means oriented in a direction orthogonal to the horizontal guide beam 31.
[0018]
Although not shown in detail, the vertical guide rail 321 may be, for example, a rail body having guide grooves having a U-shaped cross section on both sides thereof, and the sub board 33 slides in the vertical direction along the vertical guide rail 321. It is possible to move.
[0019]
That is, a sliding plate 331 that is slidably fitted in the vertical guide rail 321 is integrally attached to the back surface of the sub-board 33, and the sub-board 33 is attached to the sliding plate 331 and the vertical guide rail 321. Is held on the main substrate 32 so as to be movable up and down.
[0020]
The adhering head 20 is supported by the sub-board 33. In this case, a pair of bearing cylinders 332 and 332 are attached to the sub-board 33 via a bracket 333. The bearing cylinders 332 and 332 are both oriented in the vertical direction, and rods 334 and 334 are slidably inserted therein.
[0021]
The sticking head 20 is attached to the lower ends of the rods 334 and 334. In this embodiment, the sticking head 20 is placed between the sticking head 20 and the bearing tubes 332 and 332 on the table 10 side. Coil springs 335 and 335 that are biased toward are respectively interposed.
[0022]
The sub-board 33 is provided with a reel receiving rotary shaft 34 that rotatably holds the reel 21 around which the tape body 2 made of ACF is wound. The reel holder rotating shaft 34 is screwed with a reel presser 341 for preventing the reel 21 from falling off, and two guide rollers are provided in the tape supply path from the reel 21 to the sticking head 20. 336 and 337 are provided.
[0023]
In this embodiment, the sub board 33 is manually pushed down with respect to the table 10, and therefore, the sub board 33 is provided with a handle 35. That is, the sub-board 33 is pushed down by the operation of the handle 35, and the sticking head 20 is pushed against the terminal portion 1 a of the liquid crystal display panel 1 along with this, but between the main board 32 and the sub-board 33. Is provided with means for regulating the movement stroke.
[0024]
As shown in FIG. 4, the stroke means is provided on the side of the sub-board 33 with a pair of upper and lower relations so as to face the protrusion 322 and the protrusion 322 provided on the main board 32 side. It is comprised from the contact piece 36,36. In this example, the distance between the contact pieces 36 and 36 can be adjusted.
[0025]
That is, female screw portions 338 and 338 are respectively fixed to the upper edge and the lower edge of the sub-board 33, and the contact pieces 36 and 36 are connected to the female screws via the height adjusting screw shafts 361 and 361, respectively. Held by the sections 338 and 338. Therefore, the distance between the contact pieces 36 and 36 is adjusted by turning the adjusting screw shafts 361 and 361, and the moving stroke of the sub-board 33 is arbitrarily determined.
[0026]
Next, the sticking head 20 will be described with reference to FIG. According to this embodiment, the sticking head 20 is made of an aluminum block, and in the front view of FIG. 5A, when the moving direction during the sticking operation is the left side in the direction of the arrow X, the sticking head. The bottom surface 21 of 20 is provided with an inclination that becomes an upward gradient in the moving direction.
[0027]
In this embodiment, the inclination angle is 15 degrees, and the rising start point of the inclination is a position that is shifted to the left side by about 5 mm from the right end of the sticking head 20 in FIG. The width of the bottom surface 21 is the same as or wider than the width of the ACF tape body 2 supplied from the reel 21.
[0028]
As shown in the bottom view of FIG. 5C, a groove 211 is formed in the inclined portion of the bottom surface 21 along the moving direction of the sticking head 20. On the other hand, a convex portion 212 as shown in the right side view of FIG. The groove 211 and the convex portion 212 have the same width.
[0029]
A single main air passage 22 serving as a trunk is formed in the sticking head 20 along the moving direction. For example, five branch air passages 221 serving as branches communicate with the main air passage 22, four of which are opened in the groove 211 of the bottom surface 21, and the other one is a portion of the convex portion 212. Is open.
[0030]
The main air passage 22 is connected to a negative pressure source such as a vacuum pump (not shown). Thereby, the bottom surface 21 of the sticking head 20 acts as a negative pressure adsorption surface that adsorbs the ACF tape body 2 by the negative pressure generated in the groove 211. Due to the presence of the groove 211, the ACF tape body 2 is adsorbed and held in a state where it can be easily peeled off, not firmly on the bottom surface 21.
[0031]
Next, a series of operations of this ACF sticking apparatus will be described. It is assumed that the ACF tape body 2 has an adhesive surface on one surface, a release tape attached to the other surface, and is wound around a reel 21 with the adhesive surface side as the outside. On the table 10, as shown in FIG. 3, it is assumed that, for example, six liquid crystal display panels 1 are aligned in a line with the terminal portions 1a in the same direction.
[0032]
First, a negative pressure source (not shown) is activated to bring the sticking head 20 into a negative pressure adsorption state. The ACF tape body 2 is pulled out from the reel 21 and is stretched around the guide rollers 336 and 337, and the tips thereof are attracted and held by the sticking head 20. The negative pressure adsorption force is set to be weaker than the adhesive force of the ACF tape body 2.
[0033]
Next, with the handle 35, the sub-board 32 is lifted to a height at which the contact piece 36 below the stroke restricting means comes into contact with the protrusion 322, and the sticking head 20 is in a predetermined height position on the table 10, The main substrate 32 is moved along the horizontal guide beam 31, and the sticking head 20 is positioned at the right end of the panel row of FIG.
[0034]
Then, the handle 35 is pushed down and the sticking head 20 is lowered onto the terminal portion 1 a of the liquid crystal display panel 1. At this time, since the contact piece 36 above the stroke restricting means comes into contact with the protrusion 322, the sticking head 20 is pressed against the terminal portion 1a by a constant spring by the coil springs 334 and 334.
[0035]
Thereafter, the handle 35 is pushed to move the sticking head 20 to the left in FIGS. 1 and 3. As a result, the ACF tape body 2 is sequentially pulled out from the reel 21 and attached to each terminal portion 1a of the liquid crystal display panel 1 at a time.
[0036]
In this case, since the groove 211 and the convex portion 212 are formed on the bottom surface 21 of the sticking head 20, the ACF tape body 2 is easily separated from the bottom surface 21 and is strongly pressed by the convex portion 212. The ACF tape body 2 is securely attached to each terminal portion 1a. After the sticking is completed, the ACF tape body 2 is cut between the sticking head 20 and the table 10 with a knife or scissors.
[0037]
In this way, the ACF tape body 2 can be stuck in an ideal state straight with a constant pressing force. In the above embodiment, the sticking head 20 is moved manually, but it is also possible to use an automatic type by a driving mechanism such as a motor or an air cylinder.
[0038]
【The invention's effect】
As described above, according to the ACF adhering apparatus of the present invention, the plurality of liquid crystal display panels hold the table having the alignment surface in which the terminal portions thereof are aligned in the same direction and the ACF tape body. A tape holding means; a sticking head that travels and sticks on each terminal part while pulling out the ACF tape body from the tape holding means; and a head support means that supports the sticking head to be movable with respect to the table. The ACF tape body can be collectively affixed to each terminal portion with a constant tension in a state where a plurality of liquid crystal display panels are arranged.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an ACF sticking apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a main part of the embodiment.
FIG. 3 is a perspective view showing a table in the embodiment.
FIG. 4 is a cross-sectional view for explaining stroke restricting means in the embodiment.
FIG. 5 is a front view, a right side view, and a bottom view showing the sticking head in the embodiment.
FIG. 6 is a schematic perspective view showing a state in which an ACF tape body is attached to a terminal portion of a liquid crystal display panel.
FIG. 7 is a schematic diagram for explaining a problem in manual sticking work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 1a Terminal part 2 ACF tape body 21 Reel 10 Table 121 Panel alignment surface 122 Side surface (ruler) block 20 Adhesion head 21 Bottom surface 211 Groove 212 Protrusion part 30 Horizontal guide beam 32 Main board 33 Sub board 335 Coil spring 35 Handle

Claims (4)

In ACF attaching apparatus of a liquid crystal display panel is adhered to a series of tape body made of ACF (anisotropic conductive film) to the terminals of the plurality of liquid crystal display panels,
A plurality of liquid crystal display panels having a table having an alignment surface in which each terminal portion is aligned in the same direction, tape holding means for holding the tape body, and pulling out the tape body from the tape holding means It has an adhesion head that travels on each terminal part and adheres to each terminal part, and a head support means that supports the adhesion head movably with respect to the table ,
The head support means is provided on the main substrate so as to be orthogonal to the first guide means, a main substrate moving along the first guide means parallel to the alignment surface of the table, and the first guide means. A second substrate and a sub-substrate that moves along the second guide, and the adhering head is supported on the sub-substrate,
An ACF adhering apparatus for a liquid crystal display panel, wherein elastic means for urging the adhering head toward the table is interposed between the sub-substrate and the adhering head . 2. The ACF adhering device for a liquid crystal display panel according to claim 1 , wherein the sub-substrate is provided with stopper means for restricting a moving stroke of the adhering head. The negative pressure source connected to the said sticking head is further provided, The surface facing the said terminal part of the said sticking head is made into the negative pressure adsorption surface of the said tape body, The Claim 1 or 2 characterized by the above-mentioned. ACF sticking device for liquid crystal display panel as described in 1. 4. The ACF adhering device for a liquid crystal display panel according to claim 3 , wherein a negative pressure adsorbing groove is formed on the negative pressure adsorbing surface along a traveling direction of the adhering head.

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