JP2005161176A - Dismounting method and apparatus of plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dismounting method of a plasma display panel that does not break a glass substrate in separating a pair of glass substrates constituting the plasma display panel. <P>SOLUTION: Upon separating the panel peripheral parts, in which a sealing member 26 is installed, along the separation line in the plasma display panel 14 formed by bonding the peripheral parts of a front substrate 7 and a rear substrate 13 in a counter arrangement by the sealing member 26, scribes 29a, 29b are formed along the separation line on each of the outer faces of the front substrate 7 and the rear substrate 13. Then, the motion to incline the panel peripheral parts to be separated to the front substrate side of the panel and the motion to incline the same to the rear substrate side are conducted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a plasma display panel disassembling method and a disassembling apparatus used in a large-screen, thin and lightweight plasma display apparatus.

  In recent years, plasma display devices have attracted attention as thin display devices with excellent visibility, and higher definition and larger screens are being promoted.

  This plasma display device is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge types: a surface discharge type and a counter discharge type, but high definition, large screen, and simple manufacturing are possible. Therefore, at present, AC-type and surface-discharge-type plasma display devices are mainly used.

  In such a plasma display device, a pair of glass substrates on which a plurality of electrodes and the like are formed are arranged so as to face each other so that a discharge space is formed therebetween, and the periphery thereof is joined with frit glass. A panel module is composed of a panel, a chassis that holds the plasma display panel, and a display drive circuit block that is attached to the chassis and applies a signal to the plasma display panel to perform display. The finished product is covered.

In recent years, recycling of household electrical appliances has been regarded as important from the viewpoint of effective use of resources, and a method for disassembling a plasma display device has also been studied (for example, see Patent Document 1).
JP 2003-112155 A

  In a plasma display panel, a pair of glass substrates occupy a considerable proportion of the panel weight. Recycling the glass substrates can improve the recycling rate of the plasma display device. In order to use it, it is necessary to remove components such as electrodes formed on the glass substrate to make a sufficiently clean glass substrate. For that purpose, it is necessary to separate the pair of glass substrates constituting the panel into the respective glass substrates, but in the process after the separation, work for removing the constituent materials such as electrodes formed on the glass substrate In view of the properties, it is desirable to separate the glass substrate so as not to crack or to break the glass substrate. However, the pair of glass substrates constituting the panel are joined to each other by a frit glass so that the airtightness inside the panel is secured and the glass substrate is not broken. It was difficult to separate them. For example, when a diamond cutter is used to cut the inside of a portion joined with frit glass, the glass substrate often cracks during the cutting operation.

  The present invention has been made to solve such a problem, and an object of the present invention is to prevent the glass substrate from being broken when the pair of glass substrates constituting the plasma display panel is separated. To do.

  In order to achieve the above object, the method for disassembling a plasma display panel according to the present invention provides a plasma display panel in which peripheral portions of a front substrate and a back substrate that are arranged to face each other are joined together by a sealing member. When separating the peripheral portion of the panel along the separation line, after forming a scribe along the separation line on the outer surface of each of the front substrate and the rear substrate, the panel peripheral portion to be separated is placed on the front side of the panel. A tilting action and a tilting action toward the back side of the panel are performed.

  ADVANTAGE OF THE INVENTION According to this invention, a pair of glass substrate which comprises a plasma display panel can be isolate | separated in the state which does not break. For this reason, it becomes easy to remove components such as electrodes formed on the separated glass substrate, the glass recycling rate is improved, and resources can be used effectively.

  That is, the invention according to claim 1 of the present invention is a plasma display panel in which the peripheral portions of the front substrate and the rear substrate that are arranged to face each other are joined by a sealing member, and the peripheral portion of the panel provided with the sealing member. When the substrate is separated along the separation line, a scribing is formed on the outer surface of each of the front substrate and the rear substrate along the separation line, and then the peripheral portion of the panel to be separated is tilted toward the front side of the panel. A method of disassembling a plasma display panel, characterized by performing an operation of tilting toward the back side.

  According to a second aspect of the present invention, in the first aspect of the invention, the first clamping means is used to hold the panel across the separation line inside the separation line and to hold the panel. An operation of inclining the second clamping means toward the front side of the panel and an operation of inclining the back side of the panel after holding the peripheral portion of the panel to be separated along the separation line using the clamping means of 2 It is characterized by performing.

  According to a third aspect of the present invention, there is provided a plasma display panel in which the peripheral portions of the front substrate and the rear substrate that are arranged to face each other are joined by a sealing member, and the peripheral portion of the panel provided with the sealing member. The first clamp means for holding the panel along the separation line inside the separation line and the peripheral portion of the panel to be separated And a second clamp means for holding the sheet by holding it along the separation line, wherein the second clamp means has a function of inclining the panel peripheral part to be separated to the front side of the panel and the back side of the panel. This is a plasma display panel dismantling apparatus.

  The invention according to claim 4 is the invention according to claim 3, wherein the second clamping means is a first holding member for holding the front side of the panel and a second holding member for holding the back side of the panel. The first holding member and the second holding member are coupled and fixed so as to be detachable.

  According to a fifth aspect of the present invention, in the third aspect of the invention, the second clamping means has an arm portion extending in one direction, and a drive for rotating the arm portion. Means are provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  First, the structure of the plasma display panel will be described with reference to FIG. As shown in FIG. 1, on the front substrate 1, a plurality of display electrodes 4 each formed by a pair of stripe-shaped scanning electrodes 2 and stripe-shaped sustain electrodes 3 are formed so as to cover the display electrodes 4. A dielectric layer 5 is formed on the dielectric layer 5, and a protective layer 6 is formed on the dielectric layer 5. Thus, on the front substrate 1, a surface layer composed of the display electrode 4, the dielectric layer 5 and the protective layer 6 is formed, and thereby the front plate 7 is configured.

  A plurality of striped address electrodes 9 are formed on the back substrate 8, and an insulating layer 10 is formed so as to cover the address electrodes 9. On the insulator layer 10 between the address electrodes 9, a partition wall 11 parallel to the address electrode 9 is disposed, and a phosphor layer 12 is provided on the side surface of the partition wall 11 and the surface of the insulator layer 10. Thus, on the back substrate 8, the surface layer composed of the address electrodes 9, the insulator layer 10, the barrier ribs 11 and the phosphor layer 12 is formed, and thereby the back plate 13 is configured.

  The front substrate 1 and the rear substrate 8 are arranged to face each other through a minute discharge space so that the display electrode 4 and the address electrode 9 are three-dimensionally intersected at a right angle, and the periphery is a sealing member (frit glass). The panel is configured by sealing, for example, a mixed gas of neon and xenon as a discharge gas in the discharge space. A discharge cell is formed at a portion where the display electrode 4 and the address electrode 9 intersect three-dimensionally, and each of the discharge cells is red, green, and blue along a direction parallel to the display electrode 4. The phosphor layers 12 are sequentially arranged one by one. Further, as the front substrate 1 and the rear substrate 8, glass substrates having a thickness of about 2.5 mm to 3 mm are used.

  In the panel having such a configuration, by applying a write pulse between the address electrode 9 and the scan electrode 2, an address discharge is performed between the address electrode 9 and the scan electrode 2, and a discharge cell to be displayed is selected. Thereafter, by applying a periodic sustain pulse that is alternately inverted between the scan electrode 2 and the sustain electrode 3, a sustain discharge is generated between the scan electrode 2 and the sustain electrode 3, and a predetermined display is performed. ing.

  FIG. 2 shows an example of the overall configuration of a plasma display device incorporating the panel having the structure described with reference to FIG.

  In FIG. 2, the housing that houses the panel 14 is composed of a front frame 15 and a metal back cover 16, and the opening of the front frame 15 is made of glass that also serves as an optical filter and protects the panel 14. A front cover 17 is disposed. For example, silver deposition is performed on the front cover 17 in order to suppress unnecessary radiation of electromagnetic waves. The back cover 16 is provided with a plurality of vent holes 16a for releasing heat generated in the panel 14 and the like to the outside.

  On the back side of the panel 14, a chassis 18 made of aluminum or the like and serving as a holding member for holding the panel 14 is disposed via a heat conductive sheet 19. On the rear side of the chassis 18, the panel 14 is driven for display. A plurality of circuit blocks 20 are attached to form a display unit. The circuit block 20 includes an electric circuit for driving and controlling the display of the panel 14, and an electrode lead-out portion formed by pulling out each electrode to an edge portion of the panel 14 to form an electrode terminal. They are electrically connected by a plurality of flexible wiring boards (not shown) extending beyond the edges of the four sides. Further, a boss portion 18a for attaching the circuit block 20 and fixing the back cover 16 is protruded from the rear surface of the chassis 18 by integral molding using die casting or the like. The chassis 18 may be configured by fixing a fixing pin to an aluminum flat plate. The heat conductive sheet 19 is for efficiently transferring the heat generated in the panel 14 to the chassis 18 for heat dissipation, and is adhered to each of the panel 14 and the chassis 18 with an adhesive.

  Next, a method for disassembling such a plasma display device will be described with reference to a flow chart of the disassembling process of FIG.

  In FIG. 3, 21 is a pre-processing step for removing a panel with a chassis in which the panel 14, the heat conductive sheet 19 and the chassis 18 (see FIG. 2) are integrated from the discarded plasma display device (discard display), and 22 is with the chassis. A chassis separating step for separating the panel into the panel 14, the chassis 18 and the heat conductive sheet 19, 23 is a substrate separating step for separating the front plate 7 and the back plate 13 from the panel 14, and 24 is the front plate 7 on the front substrate 1 with respect to the front plate 7. A surface layer removing step 25 for removing the surface layer is a surface layer removing step 25 for removing the surface layer on the back substrate 8 with respect to the back plate 13. Hereinafter, each of these steps will be described.

  The waste display is first sent to the pretreatment step 21. In this step, the part of the panel 14 is taken out from the casing composed of the front frame 15 and the back cover 16 shown in FIG. 2, and the circuit block 20 and the flexible wiring board are removed. Thereby, the panel with the chassis in a state where the panel 14, the heat conductive sheet 19, and the chassis 18 are integrated is taken out. Note that the glass, metal, circuit board, or the like constituting the casing separated in this step is sent to the regeneration step after simple processing such as cleaning.

  The chassis-equipped panel taken out in the pretreatment step 21 is sent to the chassis separation step 22 and separated into the panel 14, the chassis 18, and the heat conductive sheet 19. That is, the chassis-equipped panel is heated in an electric furnace to a temperature (for example, about 150 ° C.) at which the adhesive strength of the adhesive that bonds each of the panel 14 and the chassis 18 and the heat conductive sheet 19 is reduced. The panel 14 and the chassis 18 are separated by applying a peeling force. At this time, the heat conductive sheet 19 is usually attached to the panel 14, but the heat conductive sheet 19 attached to the panel 14 can be peeled from the panel 14 by hand. If the adhesive remains on the panel 14 when the heat conductive sheet 19 is peeled off, the adhesive remains on the surface of the panel 14 by an appropriate means such as wiping off the adhesive. Remove the adhesive. The separated chassis 18 is reused as it is, or melted again and regenerated as a raw material for the chassis or the like.

  The panel 14 taken out in the chassis separation step 22 is sent to the substrate separation step 23. The panel 14 is configured by joining the front plate 7 and the back plate 13 with a sealing member made of frit glass at the periphery thereof. In addition, the protective layer 6 formed on the front substrate 1 and the partition wall 11 formed on the back substrate 8 are not bonded, and when the portion bonded by the sealing member is cut from the panel 14, the front plate 7 and the back plate 13. In the substrate separating step 23, the panel 14 is separated into a peripheral portion where the sealing member is formed, a front plate 7 excluding the peripheral portion, and a back plate 13 similarly excluding the peripheral portion. The separation method will be described later.

  In the front plate 7 obtained in the substrate separating step 23, the surface layer composed of the display electrode 4, the dielectric layer 5 and the protective layer 6 is formed on the surface of the front substrate 1. By removing the surface layer on 1, a front substrate 1 (glass substrate) in a state where nothing is formed on the surface is obtained. For example, the surface layer can be removed by polishing the surface layer on the front substrate 1 using a disc-shaped grindstone having diamond abrasive grains on the surface.

  Further, in the back plate 13 obtained in the substrate separating step 23, the surface layer composed of the address electrode 9, the insulator layer 10, the partition wall 11 and the phosphor layer 12 is formed on the surface of the back substrate 8. In the removing step 25, the surface layer on the back substrate 8 is removed. Here, the surface layer on the back substrate 8 can be removed using the same method as the method for removing the surface layer on the front substrate 1 in the surface layer removing step 24.

  Since the front substrate 1 and the back substrate 8 obtained as described above are glass substrates in a state where nothing is formed on the surface, the glass substrate is pulverized to form a cullet. Can be used as a raw material. Therefore, the recycling rate of the glass substrate can be increased.

  Next, a method for separating the panel 14 into the front plate 7 and the back plate 13 in the substrate separation step 23 described above will be described with reference to the drawings.

  FIG. 4 is a plan view when the panel 14 is viewed from the back plate 13 side. As shown in FIG. 4, the front plate 7 and the back plate 13 are joined by a sealing member 26 at the periphery thereof, and a reference numeral 27 indicated by a one-dot chain line at a position inside the sealing member 26. The line is a separation line indicating a position when the panel peripheral portion provided with the sealing member 26 is separated from the panel 14. When the panel peripheral part is separated along the separation line 27, the part inside the separation line 27 is separated into the front plate 7 and the back plate 13, and the part outside the separation line 27 is around the front plate 7 and the back plate 13. A portion in which the portions are joined by the sealing member 26 is obtained. Normally, since the sealing member 26 contains lead, the portion outside the separation line 27 can be reused as a raw material for lead-containing glass.

  FIG. 5 is a partial cross-sectional view for explaining a panel disassembling apparatus used for disassembling the panel 14 by separating the panel peripheral portion, and shows a state in which the panel 14 is set in the disassembling apparatus 28. A scribe 29a and a scribe 29b are formed on the outer surface, which is the surface of each of the front plate 7 and the back plate 13 constituting the panel 14, along a separation line 27 shown in FIG. The scribe 29a of the face plate 7 and the scribe 29b of the back plate 13 are provided at positions facing each other. The dismantling device 28 performs an operation of bending the panel peripheral portion, which is an outer portion of the scribes 29a and 29b, upward and downward, so that the panel peripheral portion is removed from the panel 14 at the position of the scribes 29a and 29b. It is an apparatus that performs the work of separating, that is, the work of breaking the peripheral portion of the panel.

  A panel support member 31 is disposed on the table 30, and a receiving member 32 made of an elastic body such as rubber is provided on the surface of the panel support member 31. Panel pressing means 33 is disposed above the panel support member 31, and a pressing member 34 made of an elastic material such as rubber is provided on the surface of the panel pressing means 33. A panel support 35 for supporting the end of the panel 14 is disposed on the table 30 so as to hold the panel 14 together with the panel support member 31 in a substantially horizontal state. The panel 14 is disposed on the panel support member 31 and the panel support base 35 so that the scribe 29 a of the front plate 7 is close to the end of the receiving member 32. The panel pressing means 33 holds the panel 14 by pressing the panel 14 toward the panel support member 31 by means (not shown). That is, the panel pressing means 33 holds the panel 14. When the panel 14 is held, the pressing member 34 is held. Are arranged so as to be close to the scribe 29 b of the back plate 13. Thus, the panel support member 31, the receiving member 32, the panel pressing means 33, and the pressing member 34 are means for holding the panel 14 along the separation line 27 inside the separation line 27 (first clamping means). It is.

  Further, the breaking arm 36 and the gripping member 37 as means for breaking the panel peripheral portion constitute a means (second clamping means) for clamping the panel peripheral portion along the separation line 27 at the tip portion thereof. The breaking arm 36 and the gripping member 37 are coupled and fixed using a fixing screw 39 via a spacer 38 made of an elastic member, and are configured to be detachable. The front ends of the breaker arm 36 and the gripping member 37 are arranged to support the surface of the panel 14 at the portion where the sealing member 26 of the panel 14 is formed, and the breaker arm 36 holds the front side of the panel 14. The holding member 37 is a second holding member that holds the back side of the panel 14.

  The arm portion 36a of the breaking arm 36 is configured to extend in one direction, and a pin 40 is provided at the end thereof. The cylinder 41 is connected to the pin 40 by a connecting member 42, and the arm portion 36a of the breaking arm 36 is rotated clockwise and counterclockwise by the reciprocating motion of the cylinder 41. The cylinder 41 and the connecting member 42 are It is a drive means for rotating the arm part 36a. The broken arm support member 43 is connected to a cylinder 45 by a shaft 44, and 46 is a stopper. The broken arm support member 43 is biased upward by a compression coil spring 47. When the cylinder 45 is operated to move the shaft 44 downward, the broken arm support member 43 is also configured to be lowered downward.

  A method for cutting the peripheral portion of the panel from the panel 14 using the disassembling apparatus 28 configured as described above will be described with reference to FIGS.

  First, scribes 29a and 29b are formed along the separation line 27 on both surfaces of the panel 14 by a diamond cutter. Next, the scribe 29 a formed on the front plate 7 is placed at a predetermined position on the panel support member 31 and the panel support base 35 so as to be close to the end of the receiving member 32 provided on the surface of the panel support member 31. The panel 14 is placed. At this time, the gripping member 37 is removed from the breaking arm 36, and the panel pressing means 33 is retracted so as not to interfere with the panel 14. Thereafter, by pressing a predetermined portion of the panel 14 against the panel support member 31 using the panel pressing means 33, the pressing member 34 on the surface of the panel pressing means 33 and the receiving member 32 on the surface of the panel support member 31, The inner part of the panel 14 is sandwiched from the scribes 29a and 29b.

  Further, as described above, when the panel 14 is placed at a predetermined position on the panel support member 31 and the panel support base 35, the portion where the sealing member 26 is formed is positioned on the upper surface of the distal end portion of the breaking arm 36. It has become. After that, when the holding member 37 is coupled and fixed to the breaking arm 36 using the fixing screw 39, the peripheral portion of the panel is sandwiched between the breaking arm 36 and the holding member 37. FIG. 5 shows this state. FIG. 5 shows a state in which the panel 14 is placed so that the front plate 7 is positioned below the back plate 13. This is because an exhaust pipe or the like is attached to the back plate 13. This is because workability is taken into consideration, and if there is no particular problem, it is possible to place the panel 14 so that the back plate 13 is on the lower side with respect to the front plate 7, contrary to the case of FIG.

  After the state shown in FIG. 5, the cutting arm 36 and the gripping member 37 are moved upward and downward to be cut at the positions of the scribes 29a and 29b. In other words, the peripheral portion of the panel is separated from the panel 14 at the positions of the scribes 29a and 29b by performing the operation of inclining the breaking arm 36 and the gripping member 37 toward the front side of the panel 14 and the operation of inclining toward the back side of the panel 14. To do.

  FIG. 6 shows a state in which the cylinder 41 is operated and the breaking arm 36 is rotated counterclockwise. The peripheral portion of the panel sandwiched between the breaking arm 36 and the holding member 37 is upward, that is, the panel 14. Tilt to the back side. At this time, tensile stress due to bending force is generated in the scribe 29 a formed on the front plate 7, and a crack is generated from the scribe 29 a in the thickness direction of the front plate 7. At this time, in the portion where the scribe 29 a is formed and the front plate 7 and the back plate 13 are not joined, cracks generated in the thickness direction of the front plate 7 from the scribe 29 a are directed toward the back plate 13. It will not extend to. Therefore, this time, in order to generate a crack in the thickness direction on the back plate 13, the peripheral portion of the panel is bent downward.

  That is, after the cylinder 41 is operated and returned to the state shown in FIG. 5, as shown in FIG. 7, the cylinder 41 is further operated to rotate the breaking arm 36 clockwise, and at the same time, the cylinder 45 is operated. The broken arm support member 43 is pulled down so that the broken arm 36 smoothly rotates clockwise. At this time, the peripheral portion of the panel sandwiched between the breaking arm 36 and the gripping member 37 is tilted downward, that is, the front side of the panel 14, so that the scribe 29 b formed on the back plate 13 is subjected to tensile stress due to bending force. The crack occurs in the thickness direction of the back plate 13 from the scribe 29b. Similarly, at this time, in the portion where the front plate 7 and the back plate 13 are not joined, the crack generated in the thickness direction of the back plate 13 from the scribe 29b does not extend to the front plate 7.

  By performing the operation of moving the folding arm 36 and the gripping member 37 upward and downward once or a plurality of times, cracks are formed in the scribe 29a and scribe 29b portions formed on the front plate 7 and the back plate 13, respectively. The panel peripheral part on one side of the panel 14 can be separated at the positions of the scribes 29a and 29b. By performing this operation for each side of the panel 14, the entire panel periphery is separated. As a result, the panel 14 can be separated into the panel peripheral portion where the sealing member 26 is formed, the front plate 7 excluding the panel peripheral portion, and the back plate 13 excluding the panel peripheral portion.

  According to the above method, the peripheral portion of the panel can be broken so that cracks, cracks and the like do not enter the portions inside the scribes 29a and 29b of the panel 14, so that the front plate 7 and the back plate The front plate 7 and the back plate 13 can be separated while 13 is not broken. For this reason, the front plate 7 and the back plate 13 can be easily handled in the subsequent steps, and the above-described method is used when removing the surface layers on the front substrate 1 and the back substrate 8 in the surface layer removing steps 24 and 25. It is possible to easily perform polishing using a grindstone. By this, the ratio which can recycle the glass currently used for panel 14 improves, and resources can be used effectively. In addition, since the dismantling apparatus according to the above embodiment has a simple apparatus configuration, the investment cost can be reduced, and the cost required for disassembling the panel 14 and further disassembling the plasma display apparatus can be reduced. be able to. As a result, the cost of the recycling process can be reduced.

  In the above embodiment, the breaking operation is performed for each side of the panel 14. However, for example, the dismantling apparatus may be configured to simultaneously break two opposite sides of the panel 14. Further, the present invention can be applied not only to disassembling a used and discarded plasma display device but also to disassembling a panel determined to be defective in the manufacturing process of the plasma display panel.

  As described above, according to the present invention, the pair of glass substrates constituting the plasma display panel can be separated without being broken. For this reason, it becomes easy to remove components such as electrodes formed on the separated glass substrate, which is useful when the plasma display device is disassembled.

The perspective view which shows a part of plasma display panel in one embodiment of this invention The exploded perspective view which shows the whole structure of the plasma display apparatus using the plasma display panel Disassembly process flow chart showing disassembly method of the plasma display device The top view which shows the position which isolate | separates the front plate and back plate of the plasma display panel Partial sectional view for explaining the dismantling apparatus of the plasma display panel Operational diagram when cutting the edge of the plasma display panel Operational diagram when cutting the edge of the plasma display panel

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front board 7 Front board 8 Back board 13 Back board 14 Panel 28 Dismantling apparatus 29a, 29b Scribe 31 Panel support member 33 Panel press means 35 Panel support stand 36 Breaking arm 37 Holding member 41 Cylinder 43 Breaking arm support member 45 Cylinder

Claims (5)

In the plasma display panel formed by joining the peripheral portions of the front substrate and the rear substrate facing each other with a sealing member, when separating the panel peripheral portion provided with the sealing member along the separation line, After forming a scribe along the separation line on each outer surface of the rear substrate, the plasma is characterized in that the peripheral portion of the panel to be separated is tilted toward the front side of the panel and tilted toward the back side of the panel. Display panel disassembly method. Using the first clamping means, the panel is sandwiched and held along the separation line inside the separation line, and the panel peripheral part to be separated is separated along the separation line using the second clamping means. 2. The method for disassembling a plasma display panel according to claim 1, wherein after the holding, the second clamping means is tilted toward the front side of the panel and tilted toward the back side of the panel. In a plasma display panel in which peripheral portions of a front substrate and a rear substrate that are arranged opposite to each other are joined by a sealing member, the device is used to separate the peripheral portion of the panel provided with the sealing member along a separation line. A first clamping means for holding the panel along the separation line inside the separation line, and a second clamping means for holding the periphery of the panel to be separated along the separation line And the second clamping means has a function of tilting the panel peripheral portion to be separated toward the front side of the panel and the back side of the panel. The second clamping means has a first holding member that holds the front side of the panel and a second holding member that holds the back side of the panel, and the first holding member and the second holding member can be attached and detached. 4. The apparatus for disassembling a plasma display panel according to claim 3, wherein the apparatus is fixedly coupled as described above. 4. The dismantling of the plasma display panel according to claim 3, wherein the second clamping means has an arm portion extending in one direction, and driving means for rotating the arm portion. apparatus.

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