JP2003185987A - Device for folding and dividing liquid crystal panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid the occurrence of a defect at a divided edge and to prevent divided material and a small piece of glass due to edge removal and terminal part formation from being left behind in a conveying path for a liquid crystal panel involved in dividing a a liquid crystal panel along its cutting-plane line. <P>SOLUTION: A device for folding and dividing a liquid crystal display comprises: a first folding and dividing device B composed of a thrusting up bar material 12 that is elevated or lowered by an appropriate elevating and lowering means and a dividing means 14, located over the bar material and exerting dividing force involved in being lowered; a first conveying device C for the liquid crystal panel, wherein each cutting-plane line on the liquid crystal panel A on which edge removal, terminal part formation, and large dividing and product-sized subdividing cutting-plane lines are formed on surface and rear faces is provided so as to reach the first cracking device; a second conveying device E that receives a largely divided liquid crystal panel folded and divided by the first cracking device as a load for conveying; a swiveling device D for swiveling the largely divided liquid crystal panel by 90&deg;, and a second folding and dividing device F which is provided so as to apply edge removal, terminal part formation and division along the subdividing cutting-plane line to the liquid crystal panel conveyed by a third conveying device G, and has the same configuration as that of the first cracking device. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel folding apparatus formed by bonding two glass sheets. 2. Description of the Related Art As a conventional technique for dividing a large liquid crystal panel into product sizes, cutting lines for ear dropping, large splitting and small splitting are formed on the front and back surfaces of the liquid crystal panel. In addition, a cutting line for dropping the ears, a cutting line for large and small splits is made on the back of the liquid crystal panel, and the liquid crystal panel, in which each cutting line on the front surface is split in advance, is transported (sent) to the split position. In addition, the sheet is split while applying an impact on the cutting line by a splitting member such as a bar or a roll of the splitting device (the cut is made to penetrate the cutting line to be cut). However, since a suction table called a stage (a structure in which the mounting surface or the stacking surface of the liquid crystal panel and the inside of the suction box communicate with each other through a myriad of small holes) is used for the transfer means of the liquid crystal panel, the suction table is mounted on the suction table. The entire surface of the liquid crystal panel is strongly supported by suction. In such a situation, when the liquid crystal panel is split, the liquid crystal panel on the upstream side of the split line (next split liquid crystal panel) and the liquid crystal panel on the downstream side (folded liquid crystal panel, that is, large and small split liquid crystal panels) are used. Since there is no flexibility to allow movement at the part where the panel is separated from the panel, a scorching phenomenon (a strong processing force on the cut surfaces due to the division) occurs in the divided section, and there is a defect There was also a problem that the liquid crystal panel was damaged due to the formation of defective parts and a small piece remaining on the table. [0005] In particular, as shown in FIG. 8, when a terminal portion is formed at two edges sandwiching one corner of the liquid crystal panel on the CF side of the liquid crystal panel (to a product size), along the large and small cutting lines. An end forming cutting line is inserted, and the terminal forming cutting line is cut by a cutting device. [0006] In this case, the cutting line for forming the terminal portion is split, and then the cutting line for the large split and the small split is split. [0007] At this time, when the bending is applied on the cutting line of the large and small portions, the bent portion of the terminal portion is also bent and the broken portion of the terminal portion is squeezed again. Cause The cause of the AR surface side defect is also that the AR surface is reversely warped when the CF surface is divided after the AR surface is divided, and the AR surface disconnection is increased. [0009] When the CF surface is cut, it is completely cut. At that time, the liquid crystal panel extends in the width direction simultaneously with the division. [0010] In this case, since the suction of the liquid crystal panel is too strong for the support, the center is pressed down, and the squeezing of the divided section is further promoted. In addition, since the divided liquid crystal panels of large and small parts (product size) remain sucked on the suction table, there is also a problem that the liquid crystal panels cannot be immediately transferred to the next process or taken down after the division. Was. In view of the above, the present invention is intended to prevent the occurrence of a defect in the divided edge and to immediately transfer or take off the divided liquid crystal panel to the next step. [0013] In order to solve the above-mentioned problems, the present invention provides a push-up bar material which is raised and lowered by a suitable lifting means, and which is located immediately above the bar material and has a suitable lifting and lowering means. A first splitting device composed of a splitting member for applying a splitting force in accordance with the descent by the means, a dropping line on the front and back surfaces, a cutting line for large and small products, and a cutting line for forming a terminal portion only on the back surface. Each of the cutting lines on the front surface has been cleaved, and the rear surface of each of the liquid crystal panels has a lug, a terminal portion, and a large cutting line. 1 transporting means, a second transporting device for receiving and transporting the large liquid crystal panel split by the first folding device, and receiving and transferring the large liquid crystal panel unloaded by the second transporting device. Swivel provided to swivel Device, a third transfer device provided to receive and discharge the opposite end of the large liquid crystal panel turned by the turning device in the unloading direction, and a large liquid crystal panel transferred by the third transfer device And a second splitting device having the same configuration as the first splitting device provided so as to cut off each of the ear droppings, the terminal portion formation and the small cutting line. Embodiments of the present invention will be described with reference to the accompanying drawings. In the embodiment of the present invention, as shown in FIGS. 1 to 8, both sides (front and back) of a liquid crystal panel A formed by bonding two sheets of glass are cut in advance by a cutting cutter. 1, a large cutting line 2 and a small cutting line 3 of the product size are inserted (sscribed). In the liquid crystal panel a having a product size (according to the small size), an edge dividing cutting line 4 for dividing (for forming a terminal portion) two edges sandwiching one corner of the CF surface. There is (slive) there. Then, the cutting line 1, the large cutting line 2, and the small cutting line 3 on the AR surface of the liquid crystal panel A are cut in advance by a splitting machine (folding device). ) A cutting line 1 on the AR side of the liquid crystal panel A in the transfer direction, a major cutting line 2 intersecting the conveying direction, a cutting line 1 on the opposite side to the conveying direction, and an edge crossing the conveying direction. The dividing line 4 is split by the first splitting device B. In the case of the first folding device B, in the case shown in the drawing, the lower surface of the divided portion is raised by the push-up bar member 12 which rises by the extension of the cylinder 11, and the dividing force (addition force) is applied to the divided portion by the descending action of the cylinder 13. (By pressure or impact) and a dividing member 14 such as a bar or a roll. It should be noted that the cylinders 11 and 13 may be moved up and down by cams or cranks. Also, the first cutting device B has an ear drop cutting line 1,
The liquid crystal panel A is transported by the first transport device C so as to sequentially reach the large cutting line 2, the ear dropping cutting line 1, and the middle edge cutting line 4. The first transporting device C is a box-shaped air having a center for floating the supplied liquid crystal panel A by blowing air upward in the case shown in the figure and an infinite number of ejection holes on the top walls on both side sides of the center. A table 15, a guide rail 16 juxtaposed between the center and the side air table 15, and a slider 17 which is restrained by the guide rail 16 so as not to rotate and runs in the front-rear direction.
And a male screw 20 which is screwed into the screw hole 18 of the slider 17 and is driven at a fixed position by a motor 19 of numerical control, and both sides of the opposite edge of the liquid crystal panel A in the feeding direction ( A suction hose (not shown) is connected to a suction hose 21 (not shown) so as to suck the lower surface of FIG. In other words, the movement (conveyance) of the divided large liquid crystal panel A 'as well as before and after the divided portion at the time of the division.
Not to disturb. In front of the first folding device B, a second transporting device E for receiving and transporting the large liquid crystal panel A 'split by the first folding device B, and the second transporting device E A turning device D is provided for receiving the large liquid crystal panel A 'carried out by E and turning it by 90 degrees. The above-mentioned second transport device E is provided with the first
An air table 15 for floating a large liquid crystal panel A 'similar to the transfer device C, a slider 17 restrained by a guide rail 16 so as not to rotate, and provided to run in the front-rear direction, and a screw of the slider 17 The male screw 20 is screwed into the hole 18 and driven at a fixed position by a motor 23 of numerical control, and both sides of the lower surface of the large liquid crystal panel A '(the inside of the remaining ear edge) are sucked. The swivel device D, which is constituted by a suction hose 24 connected to a suction hose and provided on the slider 17, receives the large liquid crystal panel A 'carried out to a fixed position by the second transfer device E, and turns the liquid crystal panel A' by 90 degrees. And a suction pad 27 which rotates 90 degrees by the operation of the motor 25 and moves up and down by the action of the cylinder 26.
After the suction and holding by 4, the male screw 20 is driven by the operation of the motor 23, and the large liquid crystal panel A 'is carried in just above the suction pad 27 while the slider 17 is moved forward. Then, the suction pad 27 which is raised by the action of the cylinder 26 sucks the large liquid crystal panel A '.
Hold by suction. On the other hand, the suction cup 24 from which suction has been released rotates the male screw 20 in the reverse direction by the operation of the motor 23, and is retracted to the load receiving position of the next split large liquid crystal panel A '. Then, the suction pad 27 is turned by 90 degrees by the operation of the motor 25, and the large liquid crystal panel A 'is turned by 90 degrees. The large liquid crystal panel A 'rotated by 90 degrees is transported by a third transport device G similar to the first transport device C and the second transport device E. The third transfer device G includes an air table 15 for floating the large liquid crystal panel A 'and a guide rail 1
6, a slider 17 which is restrained so as not to rotate and is provided so as to travel in the front-rear direction.
8 and a suction hose for sucking the lower surface of the opposite end of the large-sized liquid crystal panel A 'in the transport direction, which is provided to be driven at a fixed position by a motor 28 of numerical control. The slider 17 is connected to the suction cup 29 provided on the slider 17. Further, in front of the third transport means G, a second folding line for cutting the ear drop cutting line 1, the small cutting line 3 and the edge cutting line 4 of the sent large liquid crystal panel A '. A splitting device F is provided. The above-described second folding device F includes a first folding device B
The description of the same configuration as that described above is omitted. The second transporting device E, like the first transporting device C, is designed so that an attractive supporting force does not act on a portion near the fold line at the time of breaking. The small panel a of the product size split by the second splitting device F is floated by the same air table 15 as the second transfer device E and the third transfer device G. The slider 17 which drives the male screw 20 by operation and travels using the guide rail 16 as a guide
Is sucked out by the suction cup 31 and carried out, but may be taken down by another dispenser (not shown). Next, the splitting procedure will be described with reference to FIGS. By the pretreatment supplied to the first transport device C, A
R side ear drop cutting line 1, large split cutting line 2 and small split cutting line 3
The liquid crystal panel A, which has been cut (by penetrating the cutting line), first receives the first transfer device C such that the cutout line 1 reaches the cutting line 1 by the first splitting device B as shown in FIG. (By numerical control). Next, the bar material 12 is raised by the extension action of the cylinder 11 to push up the lower surface of the liquid crystal panel A, and then the cutting member 14 is impacted by the separating member 14 by the action of the cylinder 13 on the cutting line 1 of the upper surface of the liquid crystal panel A. Or pressurizing force. Then, the ear drop cutting line 1 penetrates and breaks, and is divided. The separated ear edge falls downward. Of course,
Glass powder and the like accompanying the separation also fall and do not remain on the transport path. In addition, since there is no holding means such as suction before and after the dividing portion by the first folding device B, there is no squeak in the dividing section, and there is no defect in the dividing section edge (such as a clam-like drop). Next, as shown in FIG. 6, the first transporting device C is operated to feed the edge breaking line 4 to the first folding device B, and the edge breaking line 4 is sent by the first folding device B as described above. Break the wire by penetrating the disconnection 4. The fragments corresponding to the splitting fall, and the terminal portions P are formed on the liquid crystal panel A as shown in FIG. Thereafter, the first cutting device B is divided into two large cutting lines 2.
After the liquid crystal panel A is transported by the first transporting device C so as to reach (shown in FIG. 7), the liquid crystal panel A is divided by the first folding device B while penetrating the large cutting line 2. As described above, the edge cutting line 4, the large cutting line 2, and the ear dropping cutting line 1 are cut and sequentially cut while being penetrated by the first cutting device B. The large liquid crystal panel A ', which has been split and sequentially divided, is received by the second transport device E and transported while being sucked by the suction cup 24, and also by the turning device D as shown in FIGS. Turn 90 degrees. Then, the swiveled large liquid crystal panel A 'is sucked by the suction cup 29 of the third transfer device G to receive the load, and the suction of the suction pad 27 is released. When the cutting line 1 of the large liquid crystal panel A 'reaches the second folding device F by the third transport device G, the cutting line 1 is cut off in the same manner as the first folding device B described above. And divide it into pieces. The separated ear edge falls. Next, the third transporting device G causes the second folding device F
At the edge, the perimeter-divided line 4 is permeated by the second dividing device F, and is divided. The divided pieces that fall due to the division fall. After that, the small cutting line 3 is added to the second folding device F.
Is reached, the small cutting line 3 is penetrated by the second splitting device F and split, and the small liquid crystal panel a of the product size separated by the split is received by the suction cup 32 and carried out. As described above, the divided liquid crystal panel a is obtained by dividing the edge dividing cutting line 4, the small cutting line 3, and the ear dropping cutting line 1 while penetrating the second cutting device F. . At the time of the above-mentioned splitting, as in the case of the splitting by the first splitting device B, there is no squeak at the edge of the divided section, and the loss is eliminated. As described above, according to the liquid crystal panel splitting device of the present invention, the liquid crystal panel and the liquid crystal panel at the splitting and splitting portion by the penetration of each cutting line by the first and second splitting devices are provided. Since there is no support means such as suction of the large liquid crystal panel, there is no squeal in the cross section due to the split. For this reason, it is possible to eliminate the defect of the divided section and eliminate the occurrence of defective products. Further, since the divided small liquid crystal panel does not remain on the suction table as in the prior art, the small liquid crystal panel can be carried out, that is, taken down immediately after the division. Further, since unnecessary parts, such as ear edges and glass powder, do not remain in the fold portions (by the push-up bar member and the dividing member) of the first and second fold devices, the first and second fold devices can be smoothly divided. In addition, the liquid crystal panel is transported and unloaded, and the panel surface is not damaged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a liquid crystal panel splitting device according to the present invention; FIG. 2 is a side view of the same; FIG. 3 is a front view of a first transporting device; FIG. FIG. 5 is a side view showing a fold of an edge. FIG. 6 is a side view showing a fold of a marginal cutting line. FIG. 7 is a side view showing a fold of a small cut line. ] Perspective view showing the splitting of the liquid crystal panel from the liquid crystal panel to the product size [Explanation of symbols] A Liquid crystal panel A 'Large split liquid crystal panel a Small split liquid crystal panel 1 Ear drop cutting line 2 Large split cutting line 3 Small split Cutting line 4 Perimeter cutting line B First folding device 11, 13 Cylinder 12 Bar material 14 Cutting member C First transport device 15 Air table 16 Guide rail 17 Slider 18 Screw hole 19 Motor 20 Male screw 21 Sucker D Rotating device E second transfer device 23 motor 24 suction cup 25 motor 26 cylinder 7 suction pad G third transfer device 28 motor 29 suction cup 30 Motor 31 sucker F second bend-breaking apparatus

Claims (1)

Claims: 1. A push-up bar material which is raised and lowered by a suitable lifting means, and a separating member which is located immediately above the bar material and which applies a separating force in accordance with the lowering by the suitable lifting means. The first splitting device that was constructed, and the front and back faces were cut, and the cutting line for forming the terminal portion was formed only on the back face, and the cut lines on the front face were cut off. A first transporting means for the liquid crystal panel provided so that the lugs, terminal portions, and large cutting lines on the respective back surfaces of the panel reach the first folding device; A second transport device for receiving and transporting the divided large liquid crystal panel, a rotating device provided for receiving the large liquid crystal panel carried out by the second transport device and rotating the liquid crystal panel by 90 degrees, and the rotating device. Turned large LCD panel A third transfer device provided to receive and discharge the end on the opposite side in the unloading direction, and each ear drop of the large split liquid crystal panel transferred by the third transfer device, a terminal portion formation and a small cutting line. A splitting device for a liquid crystal panel, comprising a splitting device provided so as to be divided and a second splitting device having the same configuration as the first splitting device.