JP2006243184A - Separating apparatus of plasma display panel holding plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separating apparatus capable of efficiently separating a holding plate from a plasma display panel in high volume comparatively inexpensively by suppressing influence of an adhesive having tack as much as possible. <P>SOLUTION: In the plasma display panel comprising; a display panel composed of a front side glass substrate in which discharge space is formed inside and a rear side glass substrate 5b; and the holding plate 7 for heat discharging which is fixed to the rear side glass substrate 5b via an adhesive member 6, the separating apparatus of a plasma display panel holding plate for heat discharging separates the holding plate 7 for heat discharging from the rear side glass substrate 5b by cutting the adhesive member 6 by making a cutting device 10 contact and relatively move the adhesive member 6. The cutting device 10 which is composed of cutting blades is equipped with a means 13 for supplying solution almost continuously to an outer surface of the cutting blade during cutting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention comprises a display panel composed of a display side glass substrate and a back side glass substrate in which a discharge space is formed, and a metal holding plate fixed to the back side glass substrate via an adhesive member. The present invention relates to a plasma display panel holding plate separating apparatus for cutting a bonding member by a cutting device to separate a metal holding plate from a rear glass.

  In recent years, a plasma display device has been used as a flat display device having a large screen and excellent visibility. In this plasma display apparatus, a pair of glass substrates are bonded together to form a glass substrate, and the inner surface of one glass substrate is coated with ultraviolet light emitted using a discharge gas injected between the two glass substrates. The body is illuminated and illuminated. When the light emission due to this discharge is repeated, the glass substrate becomes hot. Therefore, the chassis of the glass substrate is constituted by a holding plate having a heat radiation function such as aluminum, and this holding plate is made of acrylic or silicone adhesive with the glass substrate. It is fixed on the back and unitized as a plasma display panel.

  In recent years when recycling of household electrical appliances is regarded as important from the viewpoint of effective use of resources, when such a plasma display device is discarded due to a failure or the like, not only glass substrates but also precious metals contained in the interior thereof When collecting the kind, it is necessary to first separate and disassemble the glass substrate constituting the plasma display panel and the holding plate having a heat radiation function. As a method for separating and disassembling the glass substrate and the holding plate, a method of heating the plasma display panel and softening the adhesive is known, but not only a dedicated heating furnace is required, but also the glass substrate and the holding plate. Heat distortion was added to the material, making it unsuitable for reuse. Under such circumstances, as a means for separating the glass substrate and the holding plate in a short time without using a heating furnace, a technique of cutting the adhesive portion with a cutting device such as a cutting blade or a heating wire is adopted. (See Patent Document 1).

Japanese Patent Laying-Open No. 2004-184677 (see paragraphs 0013 and FIGS. 1 and 7)

  However, in the separation and dismantling means described in Patent Document 1, when using a cutting blade, the cutting waste is a sticky adhesive, so a specially shaped cutting blade must be used, and the cutting tool Not only is the production cost high, but the sharpness is unavoidable due to the effects of chips on the cutting blade that cannot be eliminated. On the other hand, when using a heated wire, due to the heating temperature, it is forced to replace the wire constantly, and it is not suitable for separating the holding plate from a large amount of plasma display panel and trying to reuse the glass substrate. .

  The present invention has been made in view of such a situation, and it is possible to efficiently separate a holding plate from a large number of plasma display panels at a relatively low cost while suppressing the influence of a sticky adhesive as much as possible. It is an object of the present invention to provide a plasma display panel holding plate separating apparatus.

In order to solve the above-mentioned problems, a plasma display panel holding plate separating apparatus according to claim 1 of the present invention comprises a display panel comprising a display-side glass substrate and a back-side glass substrate each having a discharge space formed therein. In a plasma display panel composed of a heat radiating holding plate fixed to the back glass substrate through an adhesive member, the cutting device is brought into contact with the adhesive member while moving relative to the display panel. A heat dissipation holding plate separating device for a plasma display panel that cuts a member and separates a heat dissipation holding plate from the rear side glass, wherein the cutting device is constituted by a cutting blade, and the outer surface of the cutting blade during cutting The solution is supplied almost continuously.
According to this feature, since the solution always flows continuously on the outer surface of the cutting blade, the cutting surface of the adhesive member after cutting re-adheres to the cutting blade, or sticky cutting debris becomes a cutting blade. Sticking can be suppressed, the cutting edge can be maintained for a long time, and even a large amount of plasma display panels can be continuously separated from the heat dissipation holding plate.

The plasma display panel holding plate separating apparatus according to claim 2 of the present invention is the plasma display panel holding plate separating apparatus according to claim 1, wherein the cutting blade abuts against the adhesive member to make a cut. It is characterized in that it is connected to a repetitive mechanism that repetitively moves alternately between a cutting position to be inserted and a non-cutting position away from the adhesive member.
According to this feature, cutting waste adhering to the cutting blade can be wiped off by retracting to the non-cutting position where the cutting blade is separated from the adhesive member.

The plasma display panel holding plate separating apparatus according to claim 3 of the present invention is the plasma display panel holding plate separating apparatus according to claim 1 or 2, wherein the solution is applied to the outer surface from the inside of the cutting blade. It is characterized by being supplied toward.
According to this feature, since the solution can be supplied from the inside of the cutting blade toward the outer surface, the solution can be distributed relatively evenly on the outer surface.

A plasma display panel holding plate separating apparatus according to a fourth aspect of the present invention is the plasma display panel holding plate separating apparatus according to any one of the first to third aspects, wherein the cutting blade is relative to the display panel. The moving direction has a predetermined angle.
According to this feature, the cutting load of the cutting blade can be reduced as much as possible in the initial stage of cutting the adhesive member. In the middle stage of cutting, even if the cutting load increases due to an increase in the number of cut surfaces, it can be cut efficiently and continuously in combination with the cooling action of the solution.

The plasma display panel holding plate separating apparatus according to claim 5 of the present invention is the plasma display panel holding plate separating apparatus according to any one of claims 1 to 4, wherein the solution is an oily solution. It is characterized by.
According to this feature, since the solution is oily, it functions as a cutting oil and can maintain the sustainability of the cutting blade.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is an exploded perspective view showing a plasma display panel to which the present invention is applied, and FIG. 2 (a) is a use state of a chassis member separating apparatus of the present invention. FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A, FIG. 3 is a cross-sectional view showing a cutting blade, and FIG. 4 is an enlarged cross-sectional view of a main part showing the internal structure of the drive mechanism. FIG. 5 is a schematic plan view showing an operation state of the cutting blade, and FIG. 6 is a cross-sectional view showing a cutting state by the cutting blade.

  A plasma display panel 1 shown in FIG. 1 includes a front case portion 2 and a back case portion 8 that are combined with each other to form a case, and an internal unit 30 that is accommodated in the case.

  The internal unit 30 includes a chassis member 7 as a heat radiating holding plate, a plasma display panel substrate (hereinafter abbreviated as a PDP substrate) 5 as a display panel supported on the front surface of the chassis member 7, a chassis member 7, A heat conductive sheet 6 as an adhesive member interposed between the PDP substrate 5 and an optical functional filter 3 having functions such as antistatic, color tone / brightness correction, electromagnetic wave shielding and the like and disposed on the front surface of the PDP substrate 5 And consist of

  As shown particularly in FIG. 2, the PDP substrate 5 is composed of a glass front plate 5a (display side glass substrate) and a back plate 5b (back side glass substrate). The front plate 5a is a back plate 5b. The long side direction is long and the short side direction is short. Accordingly, there is a region where the front plate 5a and the back plate 5b do not overlap each other, and terminals (not shown) connected to electrodes (not shown) provided in the PDP substrate 5 are formed in the non-polymerized region. ing. A plurality of film-like wiring (not shown) having a connector (not shown) at the tip is crimped to this terminal, and the connector is provided on a circuit board (not shown) arranged on the back surface of the chassis member 7. By being coupled to (not shown), the circuit board and the PDP board 5 are electrically connected.

  The peripheral portions of the front plate 5a and the back plate 5b are bonded and sealed with a sealing material 9 made of low melting point glass to form a gas discharge space, and a predetermined pressure is contained in the sealed gas discharge space. A rare gas (such as a mixed gas of neon and xenon) is enclosed.

  Specifically, the front plate 5a covers a transparent glass substrate (not shown) and an electrode pair (not shown) made up of display electrodes formed on a surface of the glass substrate facing the rear plate 5b. A transparent dielectric layer (not shown) made of dielectric glass is formed, and a protective layer (not shown) made of magnesium oxide (Mgo) provided on the rear side of the dielectric layer.

  The back plate 5b includes a transparent glass substrate (not shown), an address electrode (not shown) patterned on the surface of the glass substrate facing the front plate 5a, and a back surface formed so as to cover the address electrode. It is composed of a dielectric layer (not shown) and a rib (not shown) provided on the front side of the dielectric layer, and red (R), green (G), and blue (B) between the ribs. A phosphor layer is formed.

  Thus, the space part divided by each rib becomes a light emitting region, and the phosphor layer is applied to each light emitting region. The rib and the address electrode are formed in parallel, the display electrode is orthogonal to the address electrode, and a discharge cell (not shown) is formed at the intersection of the display electrode and the address electrode.

  In the display panel configured as described above, an address pulse is applied between the address electrode and the display electrode based on image data to be displayed, and then a sustain pulse is applied between the paired display electrodes. Sustain discharge occurs selectively at. As a result, ultraviolet rays are generated in the discharge cells in which the sustain discharge has occurred, and visible light is emitted from the phosphor layers of the respective colors (R, G, and B) excited by the ultraviolet rays, and an image is displayed.

  The chassis member 7 is made of aluminum die-casting or the like. Although not shown in the drawing, a plurality of heat radiation fins are integrally formed over almost the entire area, and the chassis member 7 performs light emission driving and light emission control of the PDP substrate 5. A circuit board is attached.

  The heat conductive sheet 6 efficiently conducts heat of the PDP substrate 5 to the chassis member 7, and is made of, for example, a double-sided pressure-sensitive adhesive sheet made of a thermosetting pressure-sensitive adhesive composition such as acrylic, silicone, or epoxy. Composed. That is, the heat conductive sheet 6 made of the thermosetting pressure-sensitive adhesive composition has heat resistance stability, and the problem due to thermal expansion between the PDP substrate 5 and the chassis member 7 during use is alleviated. Peeling is less likely to occur. Moreover, the thickness after thermosetting of the heat conductive sheet 6 in a present Example is about 1-2 mm.

  FIG. 2 shows the chassis member separating apparatus 20. In this embodiment, the chassis member separating apparatus 20 includes a cutting blade 10 that is formed at least longer than the length of the short side of the PDP substrate 5b, and drive units 11 and 11 'for driving the cutting blade 10. And a supply pump 12 for supplying a solution to the outer surface of the cutting blade 10 as will be described later. The cutting blade 10 repeatedly moves in parallel with the display surface of the PDP substrate 5, Further, the chassis member 7 and the PDP substrate 5 can be separated by being inserted from the short side of the PDP substrate 5 into the substantially central portion in the thickness direction of the heat conductive sheet 6 and cutting in the longitudinal direction of the PDP substrate 5. It is like that. That is, in this embodiment, the cutting device is constituted by the cutting blade 10 and the drive units 11 and 11 ′ for driving the cutting blade 10, and the cutting device and the cutting device are arranged in the longitudinal direction of the PDP substrate 5. A chassis member separation device 20 is configured including a device (not shown) for movement and the supply pump 12.

  As shown particularly in FIGS. 3 and 4, a space portion 14 extending in the longitudinal direction is formed inside the cutting blade 10 of the present embodiment, and a tapered surface constituting the front and back surfaces of the blade portion. A plurality of discharge holes 13 communicating with the space portion 14 are formed in 10a and 10a. The discharge holes 13 of the present embodiment are formed in a plurality of rows by four in the traveling direction of the cutting blade 10 and at predetermined intervals in the longitudinal direction.

  A communication hole 14 a is formed at one end of the space portion 14, and a hose 18 connected to the above-described supply pump 12 is extended from the communication hole 14 a, and the solution supplied from the supply pump 12. Is introduced into the space 14 formed inside the cutting blade 10 via the hose 18.

  Further, as shown in FIG. 5, connecting pieces 10b and 10b are extended outward from both longitudinal ends of the cutting blade 10, and the end portions of the connecting pieces 10b and 10b are The shafts 17 are pivotally attached to predetermined positions on the upper surfaces of the turntables 16 and 16 ′ rotatably provided inside the drive units 11 and 11 ′.

  The rotary disk 16 provided in one drive unit 11 is fixed to a drive shaft 15a protruding from the upper surface of the speed reduction unit 19 linked to the drive motor 15 provided below, and the drive motor 15 is fixed. When the drive shaft 15a is driven to rotate, it rotates clockwise as shown in FIG.

  The turntable 16 ′ provided in the other drive unit 11 ′ is a follower turntable, and is provided rotatably around a drive shaft 16a fixed at a predetermined position in the drive unit 11 ′. Yes.

  Note that the cutting blade 10 is disposed so as to be substantially parallel to the short side of the panel in a state where the end portions of both the connecting pieces 10b and 10b are pivotally attached to the respective rotary plates 16 and 16 '. The drive control of the drive motor 15 and the supply pump 12 is performed by a control device (not shown).

  As shown in FIG. 5, the chassis member separating apparatus 20 configured as described above is driven by the rotating disk 16, which is driven by the driving motor 15, and the rotating disk 16 ′ connected via the cutting blade 10 is driven. By rotating, the cutting blade 10 performs a circular motion in the horizontal direction while maintaining a posture parallel to the short side of the panel.

  Specifically, the cutting blade 10 has a circular edge along the circumference of the turntables 16 and 16 'when the turntables 16 and 16' rotate clockwise in the state of the solid line in FIG. After moving to an arc shape and moving to the position indicated by a two-dot chain line in FIG. 5, the both ends further move in an arc shape along the circumference of the rotary plates 16 and 16 ′ and return to the solid line position in FIG. repeat.

  That is, the cutting blade 10 is in contact with the heat conductive sheet 6 and is cut (a position indicated by a two-dot chain line in FIG. 5), and a non-cut position (a two-dot solid line in FIG. 5) away from the heat conductive sheet 6. The drive units 11 and 11 ′ are in contact with the heat conduction sheet 6 so that the cutting blade 10 is brought into contact with the heat conduction sheet 6, and the cutting position is separated from the heat conduction sheet 6. A repetitive mechanism that alternately and repeatedly moves is constructed.

  The drive units 11, 11 ′ configured as described above are fed by a predetermined amount toward the longitudinal direction of the PDP substrate 5 by a feed mechanism (not shown) while circularly moving the cutting blade 10 as described above. Yes. Thereby, the cutting blade 10 is inserted into the heat conductive sheet 6 from the short side of the PDP substrate 5 and advances in the longitudinal direction of the PDP substrate 5 while repeating circular motion.

  Further, during the movement of the cutting blade 10, the above-mentioned solution is sent from the supply pump 12 toward the cutting blade 10 by a predetermined amount. In particular, as shown in FIG. A small amount of solution is supplied almost continuously to the outer surface of the cutting blade 10 from 14 through a plurality of discharge holes 13. The solution is preferably water.

  As a result, the solution flows between the outer surface of the cutting blade 10 and the cut surface of the cut heat conductive sheet 6, so that the cut surface of the heat conductive sheet 6 after cutting is reattached to the outer surface of the cutting blade 10. In addition, sticking cutting scraps are prevented from adhering to the cutting blade, and the sharpness of the cutting blade 10 can be maintained for a long time. Therefore, the chassis member 7 can be continuously separated even in a large amount of the plasma display panel 1.

  Further, the end of each of the connecting pieces 10b and 10b of the cutting blade 10 is a drive unit as a repetitive mechanism that alternately and repetitively moves between a cutting position that makes contact with the heat conductive sheet 6 and makes a cut and a non-cutting position that is separated from the adhesive member. By being connected to 11, 11 ′, the cutting blade 10 repeats cutting and evacuation from the cutting position alternately by circular motion, and one of the cutting blades 10 in the middle of this repetitive motion. Since the portion protrudes from the long side of the heat conductive sheet 6, the cutting waste adhering to the cutting blade 10 can be removed to the outside of the heat conductive sheet 6.

  In particular, if the diameter of this circular motion is made larger, the length of the cutting blade 10 protruding from the long side of the heat conductive sheet 6 in the middle of the repetitive motion becomes larger, so that the cutting debris adhering to the cutting blade 10 is further removed. It can be effectively wiped out of the heat conductive sheet 6.

  In particular, by retracting from the cutting position to the non-cutting position after cutting, the solution can easily flow into the cutting part located in front of the blade part when retracted to the non-retracting position. Adhering to the part is suppressed.

  Furthermore, since it is possible to discharge the cutting waste toward any one edge side of the heat conductive sheet 6 by repetitive movement by circular motion, the cutting waste is discharged to the outside without being pulled back to the inside. be able to.

  Further, in the present embodiment, the solution is configured to be supplied from the space portion 14 formed inside the cutting blade 10 toward the outer surface via the plurality of discharge holes 13, so that the solution is removed from the outside. Not only can the surface be dispersed relatively evenly, but also when the thin heat conductive sheet 6 is cut, the solution can be reliably supplied to the cut surface.

  In addition, although the discharge hole 13 in a present Example was formed only in the taper surfaces 10a and 10a which comprise the blade part of the cutting blade 10, you may form in outer surfaces other than the taper surface 10a, or a discharge hole The number, arrangement position, size, etc. of 13 are arbitrary and can be variously changed.

  In addition, when such a solution is used as an oil-based cleaning agent, it functions as a cutting oil, and the sustainability of the cutting blade 10 can be further maintained.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the cutting blade 10 is cut in a state parallel to the short side of the PDP substrate 5, but may be cut from the long side of the PDP substrate 5, or as shown in FIG. Thus, for example, the cutting blade 10 may be cut in an oblique direction (for example, 45 degrees) with respect to the PDP substrate 5 so that the relative movement direction of the cutting blade 10 with respect to the PDP substrate 5 has a predetermined angle.

  In this way, the cutting load of the cutting blade 10 can be reduced as much as possible in the initial cutting of the heat conductive sheet 6. Further, in the middle stage of cutting, even if the cutting load increases due to an increase in the number of cut surfaces, it can be cut efficiently and continuously in combination with the cooling action of the solution.

  Further, the drive mechanism 11, 11 ′ of the above embodiment has a rotating disk 16 between a cutting position where the cutting blade 10 is brought into contact with the heat conducting sheet 6 to make a cut and a non-cutting position away from the heat conducting sheet 6. However, in the present invention, the present invention is limited to the reciprocating motion between the cutting position and the non-cutting position of the cutting blade 10 by the circular motion. However, it may be a repetitive movement by a linear movement.

  Moreover, in the said Example, although the solution supplied to the outer surface of the cutting blade 10 was supplied through the discharge hole 13 from the inside (space part 14) of the cutting blade 10, this invention is this. It is not limited to this, and it is sufficient that the solution can be supplied almost continuously to the outer surface of the cutting blade 10 during cutting. For example, the outer surface of the cutting blade 10 is directed from the outside of the cutting blade 10 to the outer surface of the cutting blade 10. A discharging means for discharging the solution may be applied.

  Moreover, although the blade part of the cutting blade 10 in the said Example was formed so that a front-end | tip may make an acute angle in the taper surface of a front and back, the shape of a blade part is not limited to the thing of the said Example. For example, a saw blade or the like may be applied.

It is a disassembled perspective view which shows the plasma display panel to which this invention is applied. (A) is a schematic plan view which shows the use condition of the chassis member separation apparatus of this invention, (b) is AA sectional drawing of (a). It is sectional drawing which shows a cutting blade. It is a principal part expanded sectional view which shows the internal structure of a drive mechanism. It is a schematic plan view which shows the operation | movement condition of a cutting blade. It is sectional drawing which shows the cutting condition by a cutting blade. It is a schematic plan view which shows the modification of the cutting method by a chassis member separation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plasma display panel 2 Front case part 3 Optical function filter 5 PDP substrate (display panel)
5a Front plate (display side glass substrate)
5b Back plate (Back side glass substrate)
6 Thermal conductive sheet (adhesive member)
7 Chassis member (Heat dissipation holding plate)
8 Back case part 9 Sealing material 10 Cutting blade (cutting device)
10a Tapered surface 10b Connecting pieces 11, 11 ′ Drive unit (cutting device) (repetitive mechanism)
12 Supply pump (solution supply means)
13 Discharge hole (solution supply means)
14 Space (solution supply means)
14a Communication hole 15 Drive motor (repetition mechanism)
15a Drive shaft (repetition mechanism)
16, 16 'turntable (repetition mechanism)
16a Drive shaft (repetition mechanism)
17 Shaft member (repetitive mechanism)
18 Hose (solution supply means)
19 Deceleration unit (repetition mechanism)
20 Chassis member separation device (Heat radiation separation plate separation device)
30 Internal unit

Claims (5)

  A plasma display panel comprising a display panel comprising a display side glass substrate and a back side glass substrate having a discharge space formed therein, and a heat dissipation holding plate fixed to the back side glass substrate via an adhesive member In this case, the heat-dissipating holding plate separating device for a plasma display panel that cuts the adhering member while moving the cutting device in contact with the adhering member and moving the cutting device relative to the display panel to separate the heat-dissipating holding plate from the rear glass. The cutting device comprises a cutting blade, and has a means for supplying the solution to the outer surface of the cutting blade substantially continuously during cutting, and a heat dissipation holding plate for a plasma display panel Separation device.   2. The heat dissipation of the plasma display panel according to claim 1, wherein the cutting blade is connected to a repetitive mechanism that repetitively moves alternately between a cutting position that makes contact with the adhesive member and makes a cut, and a non-cutting position that is separated from the adhesive member. Holding plate separator.   3. The heat dissipation holding plate separating apparatus for a plasma display panel according to claim 1, wherein the solution is supplied from the inside of the cutting blade toward the outer surface.   The plasma display panel heat dissipation holding plate separating apparatus according to any one of claims 1 to 3, wherein a relative movement direction of the cutting blade with respect to the display panel has a predetermined angle.   The apparatus for separating a heat dissipation plate for a plasma display panel according to any one of claims 1 to 4, wherein the solution is an oily solution.

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