JP2012001291A - Film peeling device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect holding failure of a film and downsize a film peeling device.SOLUTION: The protective film peeling device 10 includes a peeling unit peeling an end of the film adhering to a plate-like body off the plate-like body, and a holding unit 3 holding the end of the film peeled by the peeling unit. The holding unit 3 is provided with a holding wall 31 and a holding part 32 pinching the end of the peeled film. The holding wall 31 has a suction hole 31b for taking the air in. The holding part 31 has a through-hole 32c penetrating the holding part 31. When the holding wall 31 and the holding part 32 pinch the end of the film, a central axis of the through-hole 32c concentrically overlaps with a central axis of the suction hole 31b.

Description

  The present invention relates to a film peeling apparatus and a film peeling method for peeling a film attached to the surface of a protected member that is a plate-like body that is easily damaged when assembled or transported.

  In recent years, in an electronic device production process or an electrical product assembly process, a device defect or a product quality degradation is caused by scratches, dust, dust, particles, or the like. For this reason, as a countermeasure, protective films are widely used to protect the surface or exterior of electronic devices or electrical products.

  For example, a polarizing plate is provided on the outermost surface of the liquid crystal panel. A liquid crystal panel in which the surface of the polarizing plate is scratched and a liquid crystal panel in which the surface of the polarizing plate is soiled with dust, dust or the like are treated as defective products. For this reason, the protective film is affixed on the surface of the polarizing plate used as a to-be-protected member from the middle of manufacture of a polarizing plate. And the polarizing plate in the state where the protective film was affixed is affixed on a liquid crystal panel.

  However, since the protective film is not necessary for the final product liquid crystal television, there is a step of peeling the protective film in the assembly process of the liquid crystal television.

  In order to peel the protective film from the polarizing plate, initial peeling for peeling off the end portion of the protective film and whole peeling for peeling the entire protective film after the initial peeling are performed. For example, the entire surface can be peeled off by holding the protective film peeled off by the initial peeling with the gripping part and relatively moving the gripping part or the polarizing plate or winding up the protective film peeled off by the initial peeling. Peel off the entire protective film.

  For initial peeling, a method of indirectly peeling off the protective film by attaching an adhesive tape or the like to the surface of the protective film, or a method of peeling off the protective film itself with a scraper or a needle-like peeling member is used. Yes.

  However, in recent years, as the price of liquid crystal televisions has fallen, the demand for cost reduction has increased, and it has become essential to reduce the use of materials that do not contribute to improving the value of the final product, the liquid crystal television. Here, the adhesive tape used only for peeling off the protective film is a member that does not contribute to the improvement of the value of the liquid crystal television. For this reason, the peeling method of the protective film which does not use an adhesive tape etc. is calculated | required.

  And in the peeling method using an adhesive tape, the adhesive force of the adhesive of an adhesive tape and the protective film surface needs to be sufficiently larger than the adhesive force between a protective film and a polarizing plate. However, the surface of the protective film is subjected to a long-chain alkyl group or a silicon-based surface treatment so that the protective film does not stick with its own pressure-sensitive adhesive when rolled into a roll during production.

  For this reason, adhesiveness also falls with respect to the adhesive of an adhesive tape, and sufficient adhesive force for peeling a protective film from a polarizing plate cannot be obtained.

  Thus, it is preferable to use the method of peeling off a protective film directly with a peeling member rather than the method of peeling off a protective film indirectly using an adhesive tape etc.

  However, in the method of directly peeling off the protective film, the peeling member directly touches the polarizing plate, which may cause damage to the polarizing plate, or cause the peeling mistake depending on the positional accuracy of the polarizing plate and the attaching accuracy of the protective film. Become.

  Thus, for example, Patent Documents 1 and 2 disclose film peeling methods that solve this problem.

  FIG. 14 is a diagram illustrating a peeling operation of the peeling method of the conventional Patent Document 1. In FIG. Specifically, in the peeling method of Patent Document 1, first, the abutting member 103 is lowered in the direction of the arrow 107, and the abutting that is movable from above the protective film 101 with respect to the end of the protective film 101 is performed. The tip of the member 103 is pressed. And the abutting member 103 is moved to the inner side (arrow 108 direction) of the protective film 101 in the state which pressed the front-end | tip part of the abutting member 103. FIG. As a result, a partly peeled 106 a is formed between the end of the protective film 101 and the protected member 102. Next, the chuck claws 104a and 104b are arranged at predetermined positions (positions where the peeling 106a is formed), and air is blown by the air nozzle 105 from the outside (lateral direction) of the protected member 102. Then, the chuck claws 104a and 104b are lowered in the direction of the arrow 109, and the chuck claws 104b are moved in the direction of the arrow 110 to bring the chuck claws 104a and 104b closer to each other. Thereby, the peeling 106a is chucked by the chuck claws 104a and 104b by blowing air. Then, in a state where the peel 106 a is chucked, the protective claws 104 a and 104 b are pulled up in the direction of the arrow 111 to peel off the protective film 101.

  Moreover, in the peeling method of patent document 2, first, the center part of a cover film is damaged with a vibration pen with respect to the board | substrate with which the cover film was affixed on the front and back. And the edge of a cover film rises by injecting air to the damaged part. Then, the edge of the rolled up cover film is gripped, both of the rolled up cover film are detected by a photoelectric position sensor, and the presence or absence of a peeling error of the protective film is detected. Thereafter, the cover film is peeled off.

  Moreover, in the peeling method of patent document 3, a sensor is arrange | positioned on the clamping surface of a pair of clamp body which clamps a protective film, and the protection film was clamped by detecting the signal output from a sensor. To detect.

Japanese Patent Laid-Open No. 9-309664 (published on December 2, 1997) JP-A-8-181489 (published July 12, 1996) JP 2010-1104 A (published January 7, 2010)

  However, in the peeling method of patent documents 1-3, the following problems generate | occur | produce when peeling the protective film used as peeling object.

  Specifically, in the peeling method of Patent Document 1, the inner surfaces of the chuck claws 4a and 4b facing each other are knurled, and when the protective film 1 held by the chuck claws 4a and 4b is pulled up, It is devised not to slip down. However, since the protective film 1 is surface-treated with a long-chain alkyl group or a silicon-based material, the protective film 1 may slide down depending on the surface treatment state with the long-chain alkyl group or the silicon-based material. Further, the protective film 1 may slide down due to wear of the knurled portion (the inner surfaces of the chuck claws 4a and 4b facing each other). And in the peeling method of patent document 1, since there is no function which detects the presence or absence of the protective film 1, it will flow to the following process with the state which has not peeled the protective film completely. And if it flows to the next process in the state where the protective film has not been completely peeled off, an operation to stop the production line and remove the liquid crystal panel with poor peeling each time occurs.

  Moreover, in the peeling method of patent document 2, a series of work is performed for the long side direction of a board | substrate. For this reason, it is necessary to secure an installation space for the photoelectric position sensor and the reflecting plate that detect the rising of both ends of the protective film, and the problem arises that the peeling device is enlarged. Moreover, in the peeling method of patent document 3, since the sensor is arrange | positioned to a pair of clamp body as a movable part, it is necessary to ensure the space which arrange | positions a sensor, and the problem that a peeling apparatus enlarges generate | occur | produces. .

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to realize a film peeling apparatus and a film peeling method capable of reliably detecting a film gripping error and miniaturizing the apparatus. There is to do.

  In order to solve the above-described problems, the film peeling apparatus of the present invention was peeled off by the peeling unit for peeling the end of the film attached to the plate-like body from the plate-like body and the peeling unit in the film. A film peeling apparatus including a gripping unit that grips an end portion, wherein the gripping unit includes a gripping wall portion and a gripping portion that sandwich the peeled end portion, and the gripping wall portion sucks air. And the gripping part has a through hole penetrating the gripping part, and when the gripping wall part and the gripping part sandwich the end part, the center of the through hole is provided. The shaft is characterized by overlapping with the central axis of the suction hole.

  Moreover, in order to solve said subject, the film peeling method of this invention is the peeling process which peels the edge part of the film affixed on the plate-shaped object from a plate-shaped object, and the said peeling process in the said film. A film peeling method including a gripping step of gripping the peeled end portion. In the gripping step, the gripping wall portion having a suction hole for sucking air, and the suction hole and the central axis are the same. Suction generated by gripping the end of the film while sucking air through the suction hole by the gripping part having a through hole overlapping on the core, and closing the suction hole by the end of the film It is characterized by detecting changes in pressure.

  The film peeling apparatus of the present invention includes a gripping wall portion and a gripping portion that sandwich the end portion of the film that is peeled off by the peeling unit, and the gripping wall portion is a suction for sucking air. The holding part has a through hole that penetrates the holding part. That is, in the film peeling apparatus of the present invention, the gripping unit grips the end portion peeled off by the peeling unit in the film (pinches the peeled end portion of the film) and is formed on the gripping wall portion. Air is sucked from the suction hole.

  According to the above configuration, when the gripping wall portion and the gripping portion sandwich the end portion, the center axis of the through hole overlaps with the center axis of the suction hole. If there is a peeled end of the film in the unit (gripping the end of the film), the film will block the suction hole. When the film closes the suction hole, the pressure in the suction circuit that performs the air suction operation through the suction hole increases. On the other hand, when there is no film in the gripping unit (not gripping the end of the film), no pressure change occurs due to air suction from the suction hole.

  Thus, according to said structure, the presence or absence of the film in a holding | grip unit can be detected by detecting the raise of the pressure in the circuit for suction which performs air suction operation via the hole for suction. That is, according to the above configuration, it is possible to reliably detect a film gripping error by detecting a pressure increase in the suction circuit. Further, according to the above configuration, the film end is gripped by the gripping unit while performing the air suction operation through the suction hole, and the film gripping error is detected. It is not necessary to secure an installation space, and downsizing of the apparatus can be realized.

  Therefore, according to said structure, the film peeling apparatus which can detect the holding | grip mistake of a film reliably and can reduce an apparatus in size can be implement | achieved.

  Further, in the film peeling apparatus of the present invention, the gripping wall portion includes a first elastic portion having a first elastic through hole communicating with the suction hole on a side facing the gripping portion, and the gripping portion is Preferably, a second elastic portion having a second elastic through hole communicating with the through hole is provided on the side facing the gripping wall portion.

  According to said structure, the said grip wall part is provided with the 1st elastic part which has the 1st elastic through-hole connected to the said suction hole in the side facing the said grip part, The said grip part is the said grip Since the second elastic part having the second elastic through hole communicating with the through hole is provided on the side facing the wall part, the grip wall part and the end part where the grip part is peeled off by the peeling unit in the film When the film is sandwiched, the end portion of the film comes into contact with the first elastic portion and the second elastic portion. Therefore, according to said structure, since the edge part of a film contacts a 1st elastic part and a 2nd elastic part, it can prevent that a protective film slides down from a holding | grip unit. Further, according to the above configuration, the first elastic through hole communicating with the suction hole and the second elastic through hole communicating with the through hole are formed in each of the first elastic portion and the second elastic portion. Therefore, it is possible to easily detect an increase in pressure in the suction circuit through the suction hole.

  Moreover, in the film peeling apparatus of this invention, it is preferable that the said holding part and the said holding part each were equipped with the flat part in the mutually opposing side.

  According to said structure, since the said holding part and the said holding part are each equipped with the flat part in the mutually opposing side, the edge part by which the holding wall part and the holding part peeled by the said peeling unit in the said film is used. When sandwiched, the contact area of the film on the gripping wall and the gripping part increases. Therefore, according to said structure, the edge part of a film can be hold | gripped more strongly and the mistake of holding | grip of a film can be prevented more reliably.

  Moreover, in the film peeling apparatus of this invention, it is preferable that the said peeling unit was provided with the press part for pressing the edge part of the said film, and the movable unit for moving this press part.

  According to said structure, since the press part moves with a movable unit in the state which pressed the edge part of the film with the press part, the edge part of a film can be peeled efficiently by a peeling unit.

  Moreover, in the film peeling apparatus of this invention, it is preferable to provide the gas injection part which blows gas in the clearance gap between the plate-shaped body and film which arose by the press by the said press part.

  According to said structure, when a press part moves by a movable unit in the state which pressed the edge part of the film by the press part, it is gas with respect to the clearance gap between the plate-shaped body and film which were produced by the press by the said press part. Gas can be sprayed from the injection part. Thereby, the clearance gap between a plate-shaped body and a film can be enlarged. Therefore, according to said structure, peeling of a film can be performed more reliably.

  As described above, in the film peeling apparatus of the present invention, the gripping unit includes a gripping wall portion and a gripping portion that sandwich the peeled end portion, and the gripping wall portion is for suction for sucking air. The grip portion has a through hole that penetrates the grip portion, and when the end portion is sandwiched, the center axis of the through hole and the center axis of the suction hole are the same. It is the structure which has overlapped on the core.

  In addition, as described above, the film peeling method of the present invention includes a gripping wall portion having a suction hole for sucking air, and a penetration in which the suction hole and the central axis overlap on the same axis in the gripping step. The gripping portion having a hole grips the end of the film while sucking air through the suction hole, and the suction pressure change caused by the end of the film closing the suction hole It is the structure to detect.

  Therefore, it is possible to reliably detect a film gripping error and to reduce the size of the apparatus.

It is a perspective view which shows the structure of the film peeling apparatus of this invention. It is sectional drawing which shows schematic structure of the liquid crystal panel provided with the protective film peeled by the film peeling apparatus of this invention. It is a top view which shows the manufacturing process of the liquid crystal television using the film peeling apparatus of this invention. It is a perspective view which shows the structure of the holding wall part in the film peeling apparatus of FIG. It is a perspective view which shows the state by which the grip wall side rubber was attached to the grip wall part of FIG. It is a perspective view which shows the structure of the holding part in the film peeling apparatus of FIG. It is a perspective view which shows the structure of the holding part and rotation mechanism part in the film peeling apparatus of FIG. It is sectional drawing which shows the structure of the holding | grip unit part in the film peeling apparatus of FIG. It is a perspective view which shows the peeling process of the protective film using the film peeling apparatus of this invention. It is a perspective view which shows the peeling process of the protective film using the film peeling apparatus of this invention. It is a perspective view which shows the peeling process of the protective film using the film peeling apparatus of this invention. It is a perspective view which shows the peeling process of the protective film using the film peeling apparatus of this invention. It is a perspective view which shows the peeling process of the protective film using the film peeling apparatus of this invention. It is a figure which shows the peeling operation | movement of the peeling method of patent document 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

  This embodiment demonstrates the protective film peeling apparatus which peels the protective film affixed on the surface of the liquid crystal panel as an example of the film peeling apparatus of this invention. The protective film peeling apparatus (film peeling apparatus) of this embodiment peels the protective film affixed on the polarizing plate of the liquid crystal panel.

  First, the liquid crystal panel provided with the protective film peeled off by the protective film peeling apparatus of this embodiment is demonstrated. FIG. 2 is a cross-sectional view illustrating a schematic configuration of a liquid crystal panel including a protective film that is peeled off by the protective film peeling device of the present embodiment.

  As shown in FIG. 2, the liquid crystal panel 20 has a configuration in which a TFT substrate 7 and a color filter substrate 8 are attached. A very small amount of liquid crystal material (not shown) is injected between the TFT substrate 7 and the color filter substrate 8. Polarizing plates 9a and 9b are attached to the surface of the TFT substrate 7 and the surface of the color filter substrate 8, respectively. The liquid crystal panel 20 is attached with a drive IC, a signal input circuit board, etc. (not shown).

  The areas of the polarizing plates 9 a and 9 b are larger than the display area (video display area) of the liquid crystal panel 20 and smaller than the surface area of the TFT substrate 7 or the color filter substrate 8. For the purpose of preventing damage and contamination of the polarizing plates 9a and 9b, protective films 11a and 11b are attached via an adhesive.

  The protective films 11a and 11b are affixed during the production of the polarizing plates 9a and 9b. Then, it is cut larger than a predetermined size, and the end surface is polished to a predetermined size and manufactured. For this reason, the polarizing plates 9a and 9b and the protective films 11a and 11b have substantially the same size (surface area). That is, in this embodiment, the side surfaces of the polarizing plates 9a and 9b and the side surfaces of the protective films 11a and 11b are flush with each other.

  Note that the adhesive that attaches the polarizing plates 9a and 9b to the TFT substrate 7 or the color filter substrate 8 has good adhesion to the glass surface formed on the surface of each substrate. For this reason, the adhesive force between the polarizing plates 9a and 9b and the TFT substrate 7 or the color filter substrate 8 is far greater than the adhesive force between the polarizing plates 9a and 9b and the protective films 11a and 11b. strong.

  Next, FIG. 3 is a top view showing a manufacturing process of a liquid crystal television using the protective film peeling apparatus of this embodiment. That is, FIG. 3 shows a step of peeling the protective films 11a and 11b of the liquid crystal panel 20 of FIG. 2 (film peeling step). Below, although peeling of the protective film 11b formed in the back surface of the liquid crystal panel 20 of FIG. 2 is demonstrated, it is the same also about peeling of the protective film 11a.

  Specifically, as shown in FIG. 3, in the film peeling step, the protective film 11 b is peeled off by the protective film peeling device (film peeling device) 10 and attached to the backlight module 14. In the film peeling step, the protective film peeling device 10, the supply line 50, the assembly line 40, and the transport unit 12 are used. The storage box 13 in which the liquid crystal panel 20 is stored is sent through the supply line 50. The assembly pallet 15 on which the backlight module 14 is placed is sent from the previous process by the assembly line 40.

  The supply line 50 includes a supply conveyor 51 and a position detection camera (not shown). The supply conveyor 51 conveys the storage box 13 in which the liquid crystal panel 20 is accommodated, stops at the delivery position to the protective film peeling apparatus 10, and conveys the empty storage box 13. The position detection camera detects the position of the liquid crystal panel 20 in the storage box 13 at the delivery position.

  The assembly line 40 includes an assembly conveyor 41 and a positioning device 42. The assembly conveyor 41 conveys the assembly pallet 15 on which the backlight module 14 is placed from the previous process. And the assembly conveyor 41 stops the assembly pallet 15 in an assembly position, and after assembling | attaching the liquid crystal panel 20 from which the protective film 11b was peeled on the backlight module 14, it conveys to a post process. The positioning device 42 positions the backlight module 14 in order to assemble the liquid crystal panel 20 on the backlight module 14.

  The transport unit 12 is configured to prevent the liquid crystal panel 20 from being bent at the initial peeling of the 6-axis vertical articulated transport robot 12a, the panel suction hand 12b that sucks and holds the liquid crystal panel 20, and the protective film 11b. It is comprised with the back surface holding | maintenance part (not shown) to suppress. The panel suction hand 12b is attached to the tip of the transfer robot 12a. Moreover, a back surface holding portion (not shown) is provided at a corner portion of the panel suction hand 12b.

  The transport unit 12 grips the liquid crystal panel 20 and transports the liquid crystal panel 20 from the supply line 50 to the assembly line 40. Specifically, the transport unit 12 receives the liquid crystal panel 20 from the delivery position of the supply line 50 and moves the liquid crystal panel 20 to the peeling position of the protective film 11b. Further, after the protective film 11 b is peeled off, the transport unit 12 moves the liquid crystal panel 20 to the assembly position (positioning device 42) of the assembly line 40 and assembles the liquid crystal panel 20 on the backlight module 14.

  The film collection box 18 collects the peeled protective film 11b.

  The protective film separating apparatus 10 includes a transport table 16 and a control unit (not shown). The transport table 16 moves the protective film peeling apparatus 10 in the direction of the arrow 17 and moves it in the vertical direction (Z-axis direction) with respect to the liquid crystal panel 20. The control unit (not shown) controls the operation of each part of the protective film peeling apparatus 10.

  FIG. 1 is a perspective view showing the configuration of the protective film peeling apparatus 10. In FIG. 1 and FIGS. 9 to 13, the short side direction of the liquid crystal panel 20 (protective film 11 b), which is the target to be peeled off by the protective film peeling device 10, is the X-axis direction, and the long side direction is the Y-axis direction. A direction perpendicular to the X-axis direction and the Y-axis direction is taken as a Z-axis direction. It can be said that the Z-axis direction is a normal direction of the liquid crystal panel 20.

  As shown in FIG. 1, the protective film peeling apparatus 10 further includes a pressing part 1, a movable unit part 2, a gripping unit part 3, and a gas injection part 4. The peeling unit includes a pressing unit 1 and a movable unit unit 2. The pressing part 1 is inclined to the opposite side to the direction in which the protective film 11b is attached. The movable unit 2 moves the pressing portion 1 in the long side direction (Y-axis direction), the short side direction (X-axis direction), and the vertical direction (Z-axis direction) of the protective film 11b. The grip unit 3 grips a part of the protective film 11b that has been peeled off by the peeling unit.

  The movable unit 2 includes an X-axis direction table 21 that moves in the long-side direction (X-axis direction) of the protective film 11b, an X-axis direction air cylinder 22, and a short-side direction (Y-axis direction) of the protective film 11b. And a Y-axis direction table 23 and a Y-axis direction air cylinder 24.

  A pressing table 25 is attached on the X-axis direction table 21. The pressing table 25 is provided with a pressing spring 26 that presses the pressing portion 1 against the protective film 11b with a constant pressure. A Z-axis direction stage 27 is attached on the pressing table 25. The Z-axis direction stage 27 is provided with a spring 28 that presses the pressing portion 1 against the liquid crystal panel 20 from below with a constant pressure. The pressing unit 1 is fixed to the Z-axis direction stage 27.

  The gas injection unit 4 is attached to the Z-axis direction stage 27. The gas injection unit 4 includes a nozzle 4a and a connection port 4b. The angle of the nozzle 4 a is adjusted so that gas (compressed air) hits the portion of the protective film 11 b that has been deformed by pressing by the pressing portion 1. Furthermore, compressed air for blowing on the protective film 11b is supplied to the connection port 4a. The connection port 4a is connected to a compressed air supply unit (not shown) as means for supplying compressed air.

  The gripping unit 3 grips the protective film 11b that has been initially peeled off, and performs full surface peeling to peel off the entire protective film 11b. The grip unit 3 includes a grip wall 31 and a grip 32 that grip the initially peeled protective film 11b, and a rotation mechanism 33. The rotation mechanism unit 33 includes an arm 331 to which the gripping unit 32 is attached, and the gripping unit 32 moves to the gripping wall unit 31 side by the rotation operation of the arm 331. The gripping wall portion 31 and the gripping portion 32 grip the protective film 11 b that has been initially peeled by the rotational operation of the arm 331. Further, a gripping wall side rubber (first elastic portion) 311 and a gripping portion side rubber (second elastic portion) 321 are attached to the mutually facing surfaces of the gripping wall portion 31 and the gripping portion 32, respectively. A pipe 64 from a suction circuit (not shown) is connected to the side surface of the grip wall 31. The grip wall 31 and the rotation mechanism 33 are fixed to the main body 34 of the grip unit 3 with fixing screws 5 and 6, respectively. The “side surface of the gripping wall portion 31” means the side surface of the gripping wall portion 31 when the surface that grips the protective film 11b is the top surface.

  Hereinafter, the configuration of the grip unit 3 that is a characteristic configuration of the protective film peeling apparatus will be described in more detail based on FIG. 1 and FIGS. FIG. 4 is a perspective view showing the configuration of the gripping wall portion 31. FIG. 6 is a perspective view showing the configuration of the grip portion 32. FIG. 7 is a perspective view showing configurations of the grip portion 32 and the rotation mechanism portion 33. FIG. 8 is a cross-sectional view showing the configuration of the grip unit 3.

  As shown in FIGS. 4 and 5, a connection hole 31 a is provided on the side surface of the gripping wall portion 31. The connection hole 31a is connected to a pipe 64 from a suction circuit (not shown). Furthermore, a suction hole 31b is provided so as to intersect the connection hole 31a. The suction hole 31b is a hole for sucking air from the surface side that holds the protective film 11b. A grip wall side groove 31c is provided on a surface of the grip wall 31 that grips the protective film 11b.

  In addition, the gripping wall side rubber 311 is processed into a shape that fits in the gripping wall side groove 31c using hard rubber of wear-resistant urethane. Further, the holding wall side rubber 311 is provided with a holding wall side rubber hole (first elastic through hole) 311a. The gripping wall side rubber 311 is fixed to the gripping wall side groove 31c with a double-sided tape or an adhesive so that the center of the gripping wall side rubber hole 311a overlaps the center of the suction hole 31b. That is, the gripping wall side rubber hole 311 a communicates with the suction hole 31 b provided in the gripping wall portion 31. FIG. 5 is a perspective view showing a state where the gripping wall side rubber 311 is attached to the gripping wall portion 31.

  In addition, as shown in FIG. 6, the grip portion 32 has a cylindrical shape. A grip portion side groove portion 32a is provided on the surface of the grip portion 32 that grips the protective film 11b. In addition, a grip part side through hole 32c penetrating the grip part 32 is provided in a shape orthogonal to the grip part side groove part 32a. That is, the grip part side through hole 32c is formed to extend in a direction perpendicular to the bottom surface among the surfaces forming the grip part side groove part 32a. The central axis of the gripping part side through hole 32c overlaps with the central axis of the suction hole 31b formed in the gripping wall part 31 when the gripping unit part 3 grips the protective film 11b. Further, the grip portion 32 is provided with an attachment portion 32 b for attachment to the arm 331 of the rotation mechanism portion 33.

  Further, as shown in FIG. 7, the gripping portion side rubber 321 is processed into a shape that fits in the gripping portion side groove 32 a by using the same hard rubber of wear-resistant urethane as the gripping wall side rubber 311. In addition, the gripping portion side rubber 321 is provided with a gripping portion side rubber hole (second elastic through hole) 321a. The gripping part side rubber 321 is fixed to the gripping part side groove part 32a with a double-sided tape or an adhesive so that the center of the gripping part side rubber hole 321a overlaps the center of the gripping part side through hole 32c. That is, the grip portion side rubber hole 321 a communicates with the grip portion side through hole 32 c provided in the grip portion 32.

  As described above, the gripping wall portion 31 a includes the gripping wall side rubber 311 having the gripping wall side rubber hole 311 a communicating with the suction hole 31 b on the side facing the gripping portion 32. In addition, the grip portion 32 includes a grip portion side rubber hole 321 having a grip portion side rubber hole 321 a communicating with the grip portion side through hole 32 c on the side facing the grip wall portion 31. For this reason, when the gripping wall portion 31 and the gripping portion 32 sandwich the end portion of the protective film 11b, the end portion of the protective film 11b comes into contact with the gripping wall side rubber 311 and the gripping portion side rubber hole 321. Therefore, according to this configuration, it is possible to prevent the protective film 11b from sliding down from the grip unit 3.

  Further, as shown in FIG. 1 and FIGS. 4 to 6, the gripping wall side rubber 31 and the gripping part side rubber hole 321 having flat surfaces are formed on the gripping part 31 and the gripping part 32 facing each other. Is provided. That is, the grip portion 31 and the grip portion 32 are configured to have a flat portion on the sides facing each other. Thereby, when the holding wall part 31 and the holding part 32 pinch | interpose the edge part of the protective film 11b, the contact area of the protective film 11b in the holding wall part 31 and the holding part 32 becomes large, and the edge part of the protective film 11b is made more. It can be gripped strongly. As a result, it is possible to more reliably prevent a gripping error of the protective film 11b.

  An arm 331 and a rotation shaft 332 are attached to the rotation mechanism unit 33. The arm 331 is attached to the rotation mechanism unit 33 via the rotation shaft 332. The rotation operation by the rotation mechanism unit 33 is performed by supplying air.

  A support hole 331a is formed at the end of the arm 331 opposite to the rotation shaft 332. An attachment portion 32b of the grip portion 32 is press-fitted and fixed in the support hole 331a. Here, the orientation of the gripping portion 32 is adjusted so that the gripping wall side rubber 311 and the gripping portion side rubber 321 face each other when gripping the protective film 11b.

  Thus, as shown in FIG. 8, when the gripping unit 3 is based on the connection hole 31a of the gripping wall 31 (when viewed from the connection hole 31a side of the gripping wall 31), the suction hole 3 The central axes of 31b, gripping wall side rubber hole 311a, gripping part side rubber hole 321a, and gripping part side through hole 32c are concentrically overlapped with each other. The suction hole 31b, the gripping wall side rubber hole 311a, the gripping part side rubber hole 321a, and the gripping part side through hole 32c all have the same diameter. Therefore, when air is sucked from the suction circuit (not shown) through the connection hole 31a in the state of FIG. 8, the resistance in the suction circuit is low, that is, the pressure in the suction circuit (that is, the suction pressure). ) Does not go up.

  In the film peeling apparatus 10 of the present embodiment, when the air is sucked through the connection hole 31a, the control unit detects the presence of the protective film 11b (gripping) by detecting an increase in pressure in the suction circuit. The gripping of the protective film 11b by the unit unit 3 is detected. That is, when the protective film 11b is not gripped by the gripping unit 3 as shown in FIG. 8, if air is sucked from the suction circuit (not shown) through the connection hole 31a, The pressure (i.e., the suction pressure) does not increase. On the other hand, when the protective film 11b is gripped by the gripping unit 3, the protective film 11b closes the hole constituted by the suction hole 31b and the gripping wall side rubber hole 311a. As a result, the pressure in the suction circuit (suction pressure) increases. In the protective film peeling apparatus 10, the control unit detects whether or not the protective film 11b is gripped by the grip unit 3 by detecting an increase in pressure (pressure to be sucked) in the suction circuit.

  As described above, in the protective film peeling apparatus 10, it is possible to reliably grip the protective film 11 b by the grip unit unit 3 by detecting a pressure change due to air suction through the suction hole 31 b formed in the grip wall 31. Prevent mistakes. For this reason, the problem that it flows to the next process in a state where the protective film as in Patent Document 1 is not completely peeled off is not caused. Therefore, according to the protective film peeling apparatus 10, it is possible to prevent the liquid crystal panel 20 with poor peeling from flowing in the next process.

  Furthermore, in the protective film peeling apparatus 10, a part of the protective film 11b is gripped to detect a gripping error. Therefore, unlike Patent Document 2, it is not necessary to secure an installation space for the photoelectric position sensor and the reflecting plate, and downsizing of the protective film peeling apparatus can be realized.

  Next, the peeling method (peeling procedure) of the protective film 11b using the protective film peeling apparatus 10 is demonstrated. The peeling method of the protective film 11b using the protective film peeling apparatus 10 includes the following steps S1-S5. Hereinafter, description will be made with reference to the drawings corresponding to the respective steps (FIGS. 2, 3, and 9 to 13). The following peeling operation and gripping operation are controlled by the control unit of the protective film peeling apparatus 10. 9 to 13 are perspective views illustrating steps of a method for peeling the protective film 11b using the protective film peeling apparatus 10. FIG. The “peeling process” means the process of steps S1 to S3, and the “gripping process” means step S4.

[Step S1] (reference diagram; FIGS. 2, 3, and 9)
Step S <b> 1 is a step of bringing the pressing portion 1 to a predetermined position of the liquid crystal panel 20 as shown in FIG. 9. Specifically, it is a step of arranging the pressing portion 1 at the end of the protective film 11b.

  More specifically, first, in the supply line 50 shown in FIG. 3, the liquid crystal panel 20 in the storage box 13 stopped at the delivery position is imaged by a position detection camera (not shown). Then, the position and inclination of the liquid crystal panel 20 in the storage box 13 are calculated from the captured image and transmitted to the protective film peeling apparatus 10. Next, based on the transmission result, each axis of the transport robot 12a is driven, and the panel suction hand 12b is moved to the position of the transmitted liquid crystal panel 20. In the panel suction hand 12b, a plurality of suction pads (not shown) for sucking and holding the liquid crystal panel 20 are equally arranged according to the size of the liquid crystal panel 20. A panel suction air circuit (not shown) is connected to each suction pad. The suction force of each suction pad is adjusted by a control unit (not shown) controlling the panel suction air circuit. Thereby, the suction force is individually guided to each suction pad, and the liquid crystal panel 20 can be sucked by an appropriate suction force.

  Subsequently, when the pressure of the panel suction air circuit reaches a predetermined value, each axis of the transport robot 12a is driven to move the panel suction hand 12b that sucks and holds the liquid crystal panel 20 to the protective film peeling position.

  And using the conveyance table 16, the protective film peeling apparatus 10 is moved to the predetermined position in the surface (XY plane) parallel to the protective film 11b. Next, the protective film peeling apparatus 10 is raised in the direction of the arrow 70. And the press part 1 is made to contact the lower surface part 7a of the TFT substrate 7, and also the protective film peeling apparatus 10 is raised with the conveyance table 16 so that about 1-3 mm press part 44 may be pressed, for example. As a result, the pressing portion 1 itself stops at a position where it hits the lower surface portion 21 a of the TFT substrate 7. On the other hand, the main body of the protective film peeling apparatus 10 rises by about 1 to 3 mm which is set, and the pressing portion 1 presses the lower surface portion 21 a of the TFT substrate 7 by the spring 28 provided on the Z-axis direction stage 27. . Thereby, position adjustment of the protective film peeling apparatus 10 (pressing part 1) is performed in the state with elasticity.

  At this time, the control unit of the protective film peeling apparatus 10 operates the suction circuit. As a result, air is sucked from the suction holes 31 b provided in the gripping wall portion 31. This pressure is the initial pressure.

[Step S2] (reference diagram; FIG. 2, FIG. 3, FIG. 10)
Step S2 is a step of pressing the pressing portion 1 against the end portion of the protective film 11b and pressing it to a predetermined position in the X-axis direction of the protective film 11b (first pressing step), as shown in FIG.

  Specifically, first, the control unit drives the X-axis direction air cylinder 22 to move the X-axis direction table 21. Thereby, as FIG. 10 shows, the press part 1 moves to a X-axis direction (direction of the arrow 71), and will be in the state which the press part 1 contacted the edge part of the protective film 11b. Further, for example, the X-axis direction air cylinder 22 is driven to move the X-axis direction table 21 so as to press the pressing portion 1 of about 3 mm. As a result, the pressing portion 1 itself stops at a position where it hits the side surface of the polarizing plate 9b, while the X-axis direction table 21 moves about 3 mm which is set. For this reason, the pressing part 1 will press the edge part of the protective film 11b with the pressing spring 26 provided in the pressing table 25. FIG. Thereby, the protective film 11b used as peeling object deform | transforms. As a result, a gap is generated between the polarizing plate 9b and the protective film 11b.

[Step S3] (Reference diagram: FIGS. 2, 3, and 11)
In step S3, as shown in FIG. 11, the pressing portion 1 is pressed against the end portion of the protective film 11b and the compressed air 4d is blown from the gas injection portion 4 while the Y direction (arrow 72) of the protective film 11b It is a step (second pressing step) for moving the pressing portion 1 to a predetermined position.

  Specifically, first, the control unit blows compressed air 4d supplied from a compressed air supply unit (not shown) from the nozzle 4a of the gas injection unit 4 toward the end of the protective film 11b. Thereby, the compressed air 4d enters the gap between the polarizing plate 9b and the protective film 11b generated by the first pressing step, so that the gap is increased and the protective film 11b is peeled off.

  Subsequently, the pressing portion 1 is pressed against the side surface of the protective film 11b while the compressed air 4d is blown. In this state, the Y-axis direction air cylinder 24 is driven to move the Y-axis direction table 23. For example, the Y-axis direction table 23 is moved so that the pressing portion 1 moves about 14 mm in the Y-axis direction (the direction of the arrow 72).

  In the second pressing step, when the pressing portion 1 is moved in the Y-axis direction, the side surface of the protective film 11b is moved while blowing the compressed air 4d from the gas injection portion 4 toward the end of the protective film 11b. Good. By carrying out like this, the compressed air 4d can be sprayed in the clearance gap which the edge part of the protective film 11b pressed and deform | transformed by the press part 1. FIG. And the clearance gap between the polarizing plate 9b and the protective film 11b can be enlarged, and the corner | angular part 11c of the peeled protective film 11b can be pressed on the holding wall part 31 side.

[Step S4] (Reference diagram; FIGS. 2, 3, and 12)
Step S4 is a step (gripping step) of gripping the corner portion 11c of the protective film 11b peeled from the liquid crystal panel 20 in steps S1 to S3 using the gripping unit portion 3. In this embodiment, in this step S4, a pressure change inside the suction circuit that is caused by the corner portion 11c of the gripped protective film 11b closing the suction hole 31b formed in the grip wall portion 31 is detected.

  Specifically, the control unit operates the rotation mechanism unit 33 to rotate the arm 331 in the direction of the arrow 331b via the rotation shaft 332. As the arm 331 rotates and moves in the direction of the arrow 331b about the rotation shaft 332, the grip portion 32 rotates and moves together with the arm 331 (moves in a direction approaching the grip wall portion 31). In this manner, the operation of gripping (pinching) the corner portion 11c of the protective film 11b between the grip wall portion 31 and the grip portion 32 is performed.

  Moreover, in the protective film peeling apparatus 10 of this embodiment, the suction hole 31b formed in the holding wall part 31 is closed by the corner part 11c of the protective film 11b by holding the protective film 11b by the holding unit part 3. Will be removed. Then, the suction hole 31b is blocked by the corner portion 11c of the protective film 11b, whereby the pressure inside the suction circuit rises from the initial pressure. In step S4, the control unit detects that the protective film 11b has been gripped without any problem because the pressure inside the suction circuit has increased. And after holding | grip of the protective film 11b is detected, it progresses to the next process. The control unit stops the supply of the compressed air 4d, controls the X-axis direction air cylinder 22, and returns the pressing portion 1 to the initial position.

  The initial peeling is completed by the above steps S1 to S4.

[Step S5] (Reference diagram; FIGS. 2, 3, and 13)
Step S5 is a protective film peeling step in which the protective film 11b is gripped by the gripping unit portion 3 in step S4 and peeled to a predetermined position.

  Specifically, in a state where the corner portion 11c of the protective film 11b is gripped by the gripping unit portion 3, the control unit operates each axis of the transport robot 12a to suck and grip the liquid crystal panel 20 in the direction of arrow 73. The suction hand 12b is moved. As shown in FIG. 13, since the corner portion 11c of the protective film 11b is held by the holding unit 3, the protective film 11b is peeled from the polarizing plate 9b as the panel suction hand 12b moves. When the panel suction hand 12b reaches the peeling completion position, the control unit controls the rotation mechanism 33 to open the corner 11c of the protective film 11b that has been gripped. Subsequently, the control unit controls the Y-axis direction air cylinder 24 to return the pressing portion 1 to the initial position. The peeled protective film 11b falls into the film collection box 18 directly below. Thus, the peeling of the protective film 11b from the polarizing plate 9b on the back side of the liquid crystal panel 20 is completed.

  Thereafter, the control unit drives each axis of the transport robot 12 a to move the panel suction hand 12 b that sucks and holds the liquid crystal panel 20 to the assembly position of the assembly line 29. At this time, the assembly pallet 34 on which the backlight module 14 is mounted is stopped at the assembly position of the assembly line 29, and the backlight module 14 is positioned on the assembly pallet 34 by the positioning device 42. The control unit drives each axis of the transport robot 12a to assemble the liquid crystal panel 20 on the positioned backlight module 14, and controls the panel suction air circuit to release the suction grip of the liquid crystal panel 20.

  Next, the control unit drives each axis of the transport robot 12 a to retract the panel suction hand 12 b from the backlight module 14. When the panel suction hand 12b is retracted, the assembly line 40 operates the assembly conveyor 41, conveys the assembly line 40 on which the backlight module 14 is placed, to a subsequent process, and completes a series of operations.

  As mentioned above, since the protective film peeling apparatus 10 which concerns on this Embodiment peels the protective film 11b stuck on the surface of the liquid crystal panel 20, the press inclined to the opposite side to the direction where the protective film 11b was stuck. Part 1, movable unit 2 for moving the pressing part 1 in the Y-axis direction, X-axis direction and Z-axis direction of protective film 11b, and a gripping unit for gripping a part of peeled protective film 11b It is the structure provided with the part 3. FIG. Moreover, the protective film peeling method is a method using the protective film peeling apparatus 10 which concerns on this Embodiment. In this protective film peeling method, the step of bringing the pressing portion 1 to a predetermined position of the liquid crystal panel 20, the pressing portion 1 is pressed against the end of the protective film 11b, and the protective film 11b is pressed to a predetermined position in the X-axis direction. The compressed air 4d is blown toward the deformed portion of the protective film 11b from the gas pressing portion 4 attached to the Z-axis direction stage 27 and the movable unit 45 is pressed to a predetermined position in the Y-axis direction. A second pressing step, a step of holding the protective film 11b between the holding wall portion 31 and the holding portion 32 (holding step), and a corner portion 11c of the protective film 11b peeled off from the liquid crystal panel 20. And a film peeling step for gripping and peeling to a predetermined position. In the gripping process, gas is blown from the gas injection part 4 and the gripping part 32 provided on the gripping unit part 3 is rotated in a state in which the protective film 11b is pressed against the gripping wall part 31 to sandwich the protective film 11b. Hold it. In the gripping step, the presence or absence of gripping of the protective film 11b is detected by detecting a change in the sucking pressure caused by the suction hole 31b being blocked by the gripped protective film 11b. With this configuration, it is possible to reliably detect a gripping error of the protective film 11b. As a result, it is possible to prevent a poorly peeled liquid crystal panel from flowing into the next process, and to realize a film peeling device and a peeling method that can be miniaturized as a peeling device because a part of the protective film 11b is gripped and detected. There is an effect that can be.

  The present invention can also be expressed as follows.

  [1] In order to peel off the end of the film attached to the surface of the rectangular plate-like body from the plate-like body, a pressing portion for pressing the film end, a gas injection portion for blowing gas, and peeling A film peeling apparatus provided with a gripping unit for gripping a part of the film, wherein the gripping unit is composed of a gripping wall and a gripping part, and performs suction on the gripping wall side. A suction hole is provided, and a through hole is provided at the same position as the suction hole on the gripping portion side. When the gripping unit portion is closed, the center of the suction hole and the center of the through hole are By overlapping on a straight line and sandwiching the film between the gripping wall and the gripping part, the suction hole where suction is performed is closed, and a change in the pressure being sucked is detected. A film peeling apparatus.

  According to said structure, the said film deform | transforms by pressing the said press part to the short side direction of the said film. Then, in a state where the gas from the gas injection unit is blown into the gap generated by the deformation, the pressing unit is moved in the long side direction of the film, and a part of the film is peeled off from the rectangular plate-like body. Let And in the state which sprayed the gas from the said gas injection part, and pressed the said film against the holding wall, the said holding part provided in the said holding unit part is rotated, and the said film is pinched | interposed between the said holding walls Grasping is performed with. By grasping the film, the suction hole where the suction is performed is closed, and by detecting a change in the sucking pressure, the presence or absence of the film can be easily detected.

  [2] When the film is sandwiched between the gripping wall and the gripping part, the gripping unit part attaches a rubber having a through hole at the same position as the suction hole to the surface on the gripping part side. A flat portion is also provided on the gripping portion side of the rubber, and a rubber having a hole is also attached to the flat portion, and when the gripping unit portion is closed, the rubber contacts and is provided on the gripping wall side. The film peeling apparatus according to [1], wherein the center of the through hole provided in the grip portion overlaps with the center of the suction hole.

  With this configuration, it is possible to detect a change in pressure sucked through the suction hole even through rubber provided to prevent the film from slipping, and to easily detect the presence or absence of the film.

  [3] In order to peel off the end of the film attached to the surface of the rectangular plate-like body from the plate-like body, a pressing part for pressing the film end, a gas injection part for blowing gas, and peeling A film peeling method using the film peeling apparatus provided with the peeling unit for gripping a part of the film that has been made to move to a predetermined position of a rectangular plate-like body A first pressing step of pressing the pressing portion to a predetermined position in the short side direction of the film and providing a gap at the end of the film, and blowing gas from the gas injection portion into the gap provided by the pressing portion In a state where the pressing portion is moved to a predetermined position in the long side direction of the film, a gas is blown from the gas injection portion, and the film is pressed against the gripping wall. The suction hole in which suction is performed by rotating the grip portion provided in the grip unit and gripping the film between the grip wall and gripping the film A step of detecting the presence or absence of the film by detecting a change in the pressure that is blocked and sucked, and the film peeling apparatus up to a predetermined position in a state where the holding film is held by the holding unit The film peeling method characterized by performing initial peeling.

  With this configuration, it is possible to easily peel off the film edge (initial peeling of the film) without using an adhesive tape, and to reliably detect a film gripping error in the next process. The liquid crystal panel can be prevented from flowing. Furthermore, since a part of the protective film is gripped and detected, the film peeling apparatus can be miniaturized.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for, for example, an apparatus and a peeling method for peeling off a protective film used for preventing scratches and the like in an assembly process of an electric product such as a liquid crystal television.

1 Pressing part (peeling unit)
2 Movable unit (peeling unit)
3 Gripping unit (gripping unit)
31 Grasp wall 31a Connection hole 31b Suction hole 311 Grasp wall rubber (first elastic part)
311a Gripping wall side rubber hole (first elastic through hole)
32 Gripping part 32c Through hole 321 Gripping part side rubber (second elastic part)
321a Gripper side rubber hole (second elastic through hole)
4 Gas injection part 10 Protective film peeling device (film peeling device)
11a Protective film (film)
11b Protective film (film)

Claims (6)

A film peeling apparatus comprising: a peeling unit for peeling an end of a film attached to a plate-like body from the plate-like body; and a gripping unit for holding an end of the film peeled by the peeling unit. ,
The gripping unit includes a gripping wall portion and a gripping portion that sandwich the peeled end portion, the gripping wall portion has a suction hole for sucking air, and the gripping portion is the gripping portion. Has a through hole that penetrates
The film peeling apparatus according to claim 1, wherein when the gripping wall portion and the gripping portion sandwich the end portion, the central axis of the through hole overlaps with the central axis of the suction hole. The gripping wall portion includes a first elastic portion having a first elastic through hole communicating with the suction hole on a side facing the gripping portion,
The film peeling apparatus according to claim 1, wherein the grip portion includes a second elastic portion having a second elastic through hole communicating with the through hole on a side facing the grip wall portion.   3. The film peeling apparatus according to claim 1, wherein each of the grip portion and the grip portion includes a flat portion on a side facing each other.   The said peeling unit was equipped with the press part for pressing the edge part of the said film, and the movable unit for moving this press part, The any one of Claims 1-3 characterized by the above-mentioned. Film peeling device.   The film peeling apparatus according to claim 4, further comprising a gas injection unit that blows gas into a gap between the plate-like body and the film generated by pressing by the pressing unit. A film peeling method including a peeling step of peeling an end portion of a film attached to a plate-like body from the plate-like body, and a gripping step of gripping the edge portion peeled in the peeling step of the film. ,
In the gripping step, a gripping wall portion having a suction hole for sucking air and a gripping portion having a through hole in which the suction hole and a central axis overlap on the same axis are interposed through the suction hole. A film peeling method, comprising: grasping an end portion of a film while sucking air, and detecting a change in suction pressure caused by the end portion of the film closing the suction hole.

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