KR20070000705A - Dust eliminate apparatus of back light unit and dust eliminate method thereof - Google Patents

Abstract

An apparatus and a method for removing dust in a backlight unit are provided to improve efficiency of removing impurities such as dust adhering onto a sheet of the backlight unit, by performing dust removing work within a clean room cut off from the outside. A sheet supply unit(100) elevates a loading plate by a height of one sheet when the sheets loaded on the loading plate are conveyed one by one. A first conveyance unit conveys the sheets to a second conveyance unit. The second conveyance unit makes the sheets pass through a clean room(510), and conveys the impurities moved-sheets to the exit side. An air knife, an ionizer, and a clean roller remove the dust remaining on the sheet within the clean room. A loading unit(700) loads the impurities moved-sheets, which are conveyed by the second conveyance unit, at the exit side.

Description

Dust Eliminating Apparatus and Removal Method of Backlight Unit {Dust Eliminate Apparatus of Back Light Unit and Dust Eliminate Method Thereof}

1 is a plan view showing a conventional backlight unit cleaning apparatus.

Figure 2 is a front view showing a conventional backlight unit cleaning device.

Figure 3 is a schematic overall perspective view showing a dust removal apparatus of the present invention.

Figure 4 is a rear perspective view showing the uploading device of the present invention.

Figure 5 is a front perspective view showing the uploading device of the present invention.

Figure 6 is a perspective view showing a first transfer device of the present invention.

7 is a plan view showing a first transfer device of the present invention.

Figure 8 is a perspective view showing a first conveying conveyor of the second conveying apparatus of the present invention.

Figure 9 is a perspective view showing a second conveying conveyor of the second conveying apparatus of the present invention.

Figure 10 is a perspective view showing a state in which the air knife and ionizer of the present invention is installed.

Figure 11 is a schematic perspective view of the main body of the present invention.

Figure 12 is a schematic front view of the main body of the present invention.

Figure 13 is a perspective view of the upper clean roller of the present invention.

Figure 14 is an exploded perspective view showing the main portion of the clean roller of the present invention.

Figure 15 is a perspective view of the loading apparatus of the present invention.

Figure 16 is a schematic perspective view showing the operation portion of the present invention.

Figure 17 is a perspective view showing a sheet wound on a clean roller of the present invention.

* Description of the symbols for the main parts of the drawings *

100: sheet feeder 101: front plate 102: side plate

103: motor 104: pedestal 105: fixing bracket

106: drive gear 107: driven gear 108: screw

109: ball screw 110: linear guide 111: loading plate

112: bracket 113: hatch 114: through hole

115: vertical plate 116: top plate 117: air jet pipe

118: ionizer 119: load sensor 121: first position sensor

122: second position sensor

200: first transfer device 201: fixing bracket 202: cylinder

203: cylinder rod 204: rod end 205: transfer plate

206: guide bar 207: guide bracket 208: top plate

209: lifting cylinder 210: flat plate 211: guide

212: vacuum pad

300: second conveying apparatus 310: first conveying conveyor 311: front rotary roller

312: fixing bracket 313: rear rotating roller

315: belt 316: stand

350: second conveying conveyor 351: front rotary roller 352: drive pinion gear

353: fixing bracket 354: rear rotating roller 355: driving roller

356: belt 357: stand

400: air knife 410: cover 411: detection sensor

412: door 450: ionizer

500: clean roller 501: wheel 502: body frame

510: clean room

530: lower clean roller 531: roller 532: motor

534: driven sprocket 535: lower drive gear 536: lower driven gear

537: lower chain 538: lower sprocket 540: lower clean roller

541: lower cylinder 550: upper clean roller 551: upper roller

552: idle gear 553: upper drive gear 554: upper driven gear

555: upper chain 556: upper sprocket 557: upper clean roller

558: upper cylinder 559: adjustment knob 560: gauge

600: dust collector 601: duct 602: outlet

700: loading device 701: plate 702: loading plate

703: vertical plate 704: air knife 705: ionizer

706: position sensor

The present invention relates to a dust removing device of a backlight unit and a method of removing the same, and more particularly to a dust removing device of a backlight unit for removing foreign matters on components of the backlight unit, such as a diffusion sheet and a reflective sheet, and a removal thereof. It is about a method.

As is well known, the backlight unit is an acrylic injection product that guides light to liquid crystals in the liquid crystal display, and is one of the main components for controlling the brightness and uniform illumination of the liquid crystal display.

Such a backlight unit includes a reflective sheet, a diffusion sheet, a light guide plate (LGP), a liquid crystal display (LCD) panel, a cold cathode fluorescent lamp (CCFL), a prism sheet, and the like. It consists of several parts.

In addition, the reflective sheet reflects the diffused light to the inside so that the light does not leak to the outside, the diffuser sheet allows the light from the light guide plate to be uniformly spread on the screen, and the light guide plate transmits the light emitted from the cold cathode fluorescent lamp to the entire surface of the LCD. It delivers the light uniformly and performs the brightness and uniform lighting function of the backlight unit. The cold cathode fluorescent lamp emits light with the applied power to provide the light source, and the prism sheet collects the light of the lamp in the backlight unit. .

Such a backlight unit sequentially stacks an LCD panel, a prism sheet, a diffusion sheet, a light guide plate, and a reflective sheet, and installs cold cathode fluorescent lamps on both sides thereof, thereby stably coupling them to the frame.

Such a backlight unit is a component that determines the brightness of a liquid crystal display, the clarity of a screen, and the like, and if foreign matter such as dust remains between the backlight units or between sheets, it causes a fatal defect in the product.

As a main cause of such defects, if foreign matters such as dust are attached to the surface of each part of the backlight unit, the foreign matters may cause the angle of irradiation of the light to be impaired or impede the passage of light, thereby degrading the screen state. Of course, there was a problem that the liquid crystal display device can not be used due to the product defect of the liquid crystal display device.

In order to solve the above problems, Korean Utility Model Application No. 2004-15260 (designation name: backlight unit cleaning device, hereinafter referred to as 'quoting proposal') is disclosed.

Such a reference design includes a housing 10 provided with a predetermined movement path, a pallet 20 moving along the movement path, in which the inspection backlight unit 1 can be accommodated, and the pallet 20 along the movement path. A transport member 30 installed in the housing 10 so as to selectively contact the pallet 20 for movement, and a cleaner 40 installed in the housing 10 so as to clean predetermined portions of the backlight unit 1. do.

Such a reference is that if the inspection backlight unit 1 is operated in a state in which the cleaning device is fixed to the pallet 20 accommodating part 26 of the housing 10, the motor 38 is driven so that the locking rod 20 is engaged with the pallet 20. The block of the Y feed unit 31 is moved along the rotary rod 35 until it is positioned in the Y insertion groove 23 of the Y.

After the Y transfer unit 31 stops the movement, the locking rod is lowered and inserted into the Y insertion groove 23, and the block is moved along the Y path 11, and the pallet 20 moves with it.

In addition, the brush 45 of the Y cleaner 41 installed in the housing 10 contacts the predetermined portion of the backlight unit 1 during the movement to perform the cleaning operation. The Y cleaner 41 cleans any edge of the backlight unit 1, the X cleaner 42 cleans any remaining edge, and the second Y cleaner 42 is cleaned by the Y cleaner 41. One spot will be cleaned once again.

Such a proposal can improve the cleaning efficiency while maintaining the level of cleaning uniformly by automating the cleaning process of the backlight unit, but the structure is complicated and the shock or vibration generated during the movement because it is moved by a plurality of transfer units This may damage the backlight unit, may cause scratches on the surface during cleaning with a brush, and cleaning with a plurality of cleaners may result in deduplication, reducing work efficiency and moving by a plurality of moving paths. As the size of the cleaning device is increased, the installation of the cleaning device is not easy, and the price of the cleaning device increases.

The object of the present invention devised to solve the above problems is to prevent the generation of static electricity in the clean room is blocked from the outside to improve the efficiency of removing foreign matters such as dust on each component of the backlight unit, as well as a continuous series The present invention provides a dust removing device of a backlight unit for removing foreign matters and a method of removing the same.

In order to achieve the above object, the present invention provides a sheet feeding step of elevating to supply the sheet loaded on the stacking plate, and transferring the sheet loaded on the raised stacking plate to the clean room by suction of a vacuum pad; When the sheet enters the clean room, the air sprayed on both sides of the clean room forms an air barrier wall to block the outside and the clean room, and the ionizer is discharged from the ionizer so that static electricity does not occur in the supplied sheet. The ion generating step of discharging, the foreign material removing step of removing foreign matters such as dust on the sheet while the conveyed sheet passes through the rollers installed at the upper and lower parts, and collecting the foreign matter inside the clean room together with the air injected from the air knife. When the dust collecting step and the removal of the foreign matter on the sheet is completed, the air blowing of the air knife is temporarily In addition, the present invention proposes an air knife and ionizer intermittent step of continuously releasing ions of the ionizer, and a dust removing method of the backlight unit comprising a discharge step of discharging the cleaned sheet.

The present invention improves the foreign matter removal efficiency by removing foreign matters such as dust on the surface of the sheet in a clean room blocked from the outside, and facilitates desorption of foreign matters by ions emitted from the ionizer as well as generating static electricity. It is useful to prevent damage to the sheet due to static electricity.

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

As shown in the drawing, the present invention provides a sheet supply apparatus 100 for loading sheets (a light guide plate, a reflecting sheet, a diffusion sheet, a prism sheet, and the like). A first transfer device 200 which sucks the supplied sheet by the suction plate and transfers it to the second transfer device, a second transfer device 300 which transfers the transferred sheet to the clean room, and transfers the cleaned sheet to the discharge side; When the sheet enters the clean room, the air knife 400 is installed on both sides of the clean room to inject air to block the outside, and ions are generated together with the air knife on both sides of the clean room to prevent the generation of static electricity and remove foreign substances from the seat. The ionizer 450 facilitates the suction, and the clean roller 500 removes the foreign matter from the sheet while passing through the sheet, and absorbs the foreign matter together with the air discharged from the clean room. A dust collecting device 600 for entering and discharging, and a stacking device 700 for loading a finished sheet.

In addition, as shown in FIGS. 4 to 5, the sheet feeder 100 fixes the front plate 101 with the middle portion open, and fixes the side plate 102 on both sides thereof. The rear of the front plate 101 is fixed to the pedestal 104 supporting the motor 103, the fixing bracket 105 for supporting the motor 103 on the upper surface thereof is fixed.

In addition, the motor 103 is installed on the upper surface of the fixing bracket 105, and the driving gear 106 coupled to the motor 103 and the driven gear 107 rotating in engagement with it are gear-coupled. The driven gear 107 is installed vertically with a screw 108, the screw 108 is coupled to the ball screw 109 is elevated by the rotation of the screw 108. In addition, the linear guide 110 is installed at positions spaced apart by a predetermined distance on both sides of the screw 108.

In addition, the ball screw 109 is fixed to the lifting plate 111 to be elevated in accordance with the lifting and lowering of the ball screw 109, and installs a bracket 112 for supporting the loading plate 111 on the lower surface of the loading plate 111 It is fixed to the lifting hole 113 which is elevated along the linear guide 110. In addition, the through plate 114 is formed in the stacking plate 111 to match the size of the stacked sheet (not shown in the drawing), and the vertical plate 115 is movably coupled so that the sheet is stacked by an appropriate amount.

In addition, the upper plate 116 is fixed to the upper surface of the front plate 101, the air injection pipe 117 is installed on the upper surface thereof, and together with the ions to release the ions to prevent the static electricity generated in the sheet Install ionizer (118).

In addition, the load plate 111 is provided with a load sensor 120 for detecting the presence or absence of the sheet, and when the loading plate 111 is lowered, the first position sensor 121 for informing whether the sheet is loaded or not The surface of the stacking plate 111 is knurled to prevent static electricity from occurring in the sheet, and a second position for sensing the height of the stacking plate 111 on the upper side of the front plate 101. The sensor 122 is installed.

In addition, the upper limit limit switch 123 is installed to limit the rising height of the stacking plate 111 so that it does not rise any more when the predetermined height is raised. The lower limit switch 124 is installed to limit the height. The upper limit switch 123 and the lower limit switch 124 as described above prevent the breakage of the sheet feeder 100 by limiting the moving distance of the loading plate 111.

6 to 7, the first transfer device 200 fixes the fixing bracket 201 fixed to the main frame 501 on both sides of the cylinder 202, and horizontally reciprocates in the cylinder 202. Engage the moving cylinder rod 203. The rod end 204 is coupled to the front end of the cylinder rod 203, the transfer plate 205 is fixed to the upper portion thereof, and the guide bar 206 is installed to move the transfer plate 205 horizontally. The guide bracket 207 is fixed to both ends of the guide bar 206 to fix it to the body frame 502.

In addition, the upper plate 208 is fixed to the upper surface of the transfer plate 205 to the upper surface of the other cylinder rod 203 at a predetermined height, and the lifting cylinder 209 which is vertically raised and lowered is coupled to the center of the upper plate 208. . A flat plate 210 having a predetermined size is installed below the upper plate 208, and the flat plate 210 is coupled to be elevated by the operation of the lifting cylinder 209, and guides are provided on both sides of the lifting cylinder 209. 211).

In addition, the flat plate 210 is provided with a plurality of vacuum pads 212 in the front and rear, when the vacuum pad 212 is in close contact with the seat sucks air from the air compressor (not shown in the drawing) vacuum pad 212 The sheet is attached in a vacuum state.

Along with this, a level sensor 215 is installed at the lower portion of the guide bar 206 so as to properly maintain the height of the seat, which limits the height at which the seat is raised, thereby smoothly conveying the sheet. It is detected whether or not the sheet 100) is present. In addition, the ionizer 216 is installed to prevent the generation of static electricity generated during the transfer of the sheet, which continuously releases ions regardless of the feeding state of the sheet, thereby preventing static electricity from the sheet and desorption of foreign substances. To facilitate.

In addition, the second transfer device 300 is composed of two transfer conveyors 310, which are shown in Figures 8 and 9, the first transfer conveyor 310 is supplied from the first transfer device 200 The sheet is transferred to the clean roller 500 side, and the second transfer conveyor 350 transfers the sheet from which the foreign matter such as dust is removed from the clean roller 500 to the discharge side.

In addition, as shown in FIG. 8, the first conveying conveyor 310 fixes the fixing brackets 312 to both ends of the front rotating roller 311 which is installed close to the first conveying apparatus 200. A fixing bracket 312 is fixed to one end of the rear rotating roller 313 installed close to the clean roller 500, and a driven sprocket 534 connected to the motor 532 and a chain is installed at the other end thereof. . Since the driven sprocket 534 and the spur gear 534a are formed in two rows, the rear spur roller 313 rotates while the driven sprocket 534 and the spur gear 534a simultaneously rotate in the same direction. .

Such rotating rollers 311 and 313 couple a plurality of belts 315 in a tensioned state, and install a pedestal 316 below the belt 315 so that the belt 315 does not stretch downward, and fixing brackets at both ends thereof. Secure 312. In addition, when the abnormality occurs in the clean room 510 is installed a sheet sensor 317 to control to stop the supply of the sheet.

In addition, as shown in FIG. 9, the second conveying conveyor 350 has a front rotating roller 351 installed close to the clean roller 500 side, and one end thereof is driven with a pinion gear that meshes with the clean roller 500. 352, and the other end thereof is fixed to the fixing bracket (353). In addition, the fixing bracket 353 is fixed to both ends of the rear rotating roller 354 in close proximity to the loading plate side, and a plurality of belts 356 are coupled between the front rotating roller 351 and the rear rotating roller 354. do. The fixing bracket 353 is fixed to both ends of the pedestal 357 to prevent the belt 356 from sagging, and a driving roller 355 is installed at the rear of the rear rotating roller 354 to smooth the transfer of the sheet. .

In addition, when an abnormality occurs in the clean room 510, the seat detection sensor 317 is installed so that the discharge of the sheet is not accumulated.

In addition, as shown in Figure 10, the air knife 400 is installed on the inside of the cover 410, the cover 410 is a lower portion is opened so that the sheet is transferred to the front, both sides and the upper surface is closed form Is done. To form the clean room 510, both sides and the top surface are formed in a closed form by the cover 410, and the front surface forms an air blocking wall which is blocked from the outside by the air injected from the air knife 400. The cover 410 is rotatably installed on both sides of the clean roller 500.

On the front side of the cover 410 is installed a detection sensor 411 for detecting whether the sheet is transferred into the clean room 510, the air inclined front surface of the cover 410 400 or ionizer 450 In the event of a failure or an abnormality of the clean room 510, the door 412 is installed to be rotatable.

In addition, the ionizer 450 is installed at the rear of the air knife 400 installed in the cover 410. The ionizer 450 releases ions to facilitate desorption of foreign substances on the surface of the sheet. That is, during the transfer of the sheet to prevent the generation of static electricity by the contact of the sheet and other objects, as well as to remove the generated static electricity, to facilitate the desorption of organic or inorganic substances on the surface of the sheet.

11 to 14, the clean roller 500 is installed on the upper and lower portions of the second transfer device 300. The clean roller 500 is provided with a cover 410 on the upper portion of the first conveying conveyor 310, the conveying side of the sheet in order to remove foreign matters such as dust, organic matter, inorganic matter, etc. adhered to the sheet in a sealed state, The cover 410 is rotatably installed on an upper portion of the second transfer conveyor 350 that is the discharge side of the cover.

In addition, the clean room 510 seals the front, rear, and both sides of the clean roller 500, and also seals the driving motor 532 for transmitting the driving force, and seals the upper clean roller 550 and the lower clean roller 530. Install in the correct state. The clean room 510 is formed in a state in which only a part of the inlet side and the discharge side through which the sheet is transferred is opened, and the open part is sealed by an air blocking wall injected from the air knife 400.

In addition, the clean roller 500 includes a lower clean roller 530 and an upper clean roller 550. The lower clean roller 530 is installed at the center of the longitudinal direction of the body frame 502 with the wheel 501, the upper clean roller 550 is installed on the upper portion thereof.

In addition, the lower clean roller 530 is provided with four rollers 531 which are interlocked and rotated in a straight line, and a motor 532 is installed at one lower side of the lower clean roller 530 and is driven by a motor 532 and a chain 533. Install the sprocket 534. The driven sprocket 534 is composed of two rows with the spur gear 534a, the sprocket 534 drives the first transfer conveyor 310 and the lower drive gear meshed with the spur gear 534a. Forward to 535. In the present invention, the driven sprocket 534, the lower drive gear 535, the lower driven gear 536, the upper drive gear 553, the upper driven gear 554, the sprocket as shown in FIG. And gears in two rows.

In addition, the spur gear 534a meshes with the lower drive gear 535, and connects the sprocket of the lower drive gear 535 and the sprocket of the lower driven gear 536 with the lower chain 537. The lower chain 537 is installed to interlock with the lower sprocket 538 coupled to the roller 531 on the upper surface thereof.

In addition, a lower clean roller 540 is installed at the lower portion of the roller 531 to rotate in surface contact with the spread paper wrapped, and a lower cylinder 541 for adjusting the height of the lower clean roller 540 is coupled.

In addition, the upper clean roller 550 is made of the same configuration as the lower clean roller 530, four upper rollers 551 are rotated in interlocking in a straight line, and the driven sprocket 534 on one side thereof ) And an idle gear 552 to be engaged, and install an upper drive gear 553 to be engaged with it, and install an upper driven gear 554 rotated with it.

An upper chain 555 is coupled between the upper drive gear 553 and the upper driven gear 554, and an upper sprocket 556 that is rotated together with the upper chain 555 is coupled to the upper roller 551. do.

In addition, the upper roller 551 is provided with a set of the upper clean roller (557) is wound in contact with the surface of the upper roller 551, the upper cylinder 558 for adjusting the height of the upper cylinder 558 is installed, Adjusting knobs 559 for adjusting the positions of the cylinder 558, the upper clean roller 557 and the upper roller 551, and the like are provided on both sides.

In addition, the front of the adjustment knob 559 is provided with a gauge 560 indicating the horizontal state and the height of the upper roller 551 and the like.

In addition, the dust collector 600 is provided with a duct 601 for transporting the foreign matter desorbed from the surface of the air and the seat in the clean room 510, a discharge port 602 for collecting dust and discharged at one end thereof is installed. do.

In addition, as shown in FIG. 15, the stacking apparatus 700 fixes a plate 701 supporting the rear and side surfaces, and installs a stacking plate 702 for stacking the sheets discharged from the second transport conveyor 350. In order to prevent the sheets to be stacked, the plurality of vertical plates 703 are installed to be movable.

An air injection pipe 704 is installed on the upper surface of the plate 701 so that dust is not attached to the sheet from which the foreign matter is removed, an ionizer 705 is installed on the stacked sheet so that static electricity does not occur, and the sheet is plated. The stacking plate 701 is mounted on the 701 and the position detection sensor 706 is installed to detect and notify the worker when the fall is completed.

In addition, the seat detection sensor 707 is installed, and an upper limit limit switch 708 and a lower limit limit switch 709 for limiting the rising and lowering heights of the loading plate 702 are installed. This is the same as that installed in the sheet feeder 100.

Further, as shown in FIG. 16, an operation unit 750 is provided at a predetermined position of the main frame 502 to temporarily start and operate the dust removing device and suspend the operation of the removing device.

According to the present invention having the above configuration, when the sheet is loaded on the stacking plate 111 of the sheet feeder 100 and the power is applied by operating the operation unit 750, sensing is performed by the motors 103 and 532 and various sensors. To get started.

First, when the sheet feeder 100 rotates the drive gear 106 by driving the motor 103, the screw 108 coupled to the driven gear 107 rotates, and the ball screw 109 coupled thereto is rotated. As it rises, the loading plate 111 rises. When the rising of the stacking plate 111 reaches the transport position of the first transporting device 200, the stacking plate 111 stops rising. At this time, the loading plate 111 is safely lifted by the upper limit sensor 123 and the lower limit sensor 124 within the limited transfer section. Subsequently, the cylinder 202 of the first transfer device 200 is operated, and thus the cylinder rod 203 is advanced to the loading plate 111 side.

At this time, in the air injection pipe 117 installed on the upper plate 116, the high pressure air is continuously sprayed to remove foreign substances such as dust, organic matter, and inorganic matter on the surface of the sheet primarily, and the ionizer installed with this ( In 118), the ions generated by the electrical signal are continuously released to prevent static electricity from being generated during the transfer, and to facilitate the desorption of foreign substances on the sheet.

When the advance of the cylinder rod 203 is completed as described above, the lifting cylinder 209 installed in the upper plate 208 is operated, and the vacuum pad 212 as the flat plate 210 descends due to the lowering of the lifting cylinder 209. ) Also descends.

The vacuum pad 212 is in contact with the stacked sheet of the loading plate 111, air is sucked into the vacuum pad 212, and the vacuum pad 212 is attached to the sheet in a vacuum state. As such, when the sheet is attached, the cylinder rod 203 is reversed and lowered to the first conveying conveyor 310 of the second conveying apparatus 300.

In this case, when the sheet is transferred to the stacking plate 111, the second position sensor 122 senses the transported state and raises the stacking plate 111 by the height at which the sheet is transported. When the loading plate 111 is repeated to repeat.

In addition, when the supply of the sheets stacked on the loading plate 111 is completed, if the load is not detected by the load sensor 120, the loading plate 111 is lowered, and the first position detection sensor 121 installed at the lower portion thereof. It is detected that the loading plate 111 is lowered), thereby operating the alarm sound or lamp to inform the worker, thereby providing a sheet to the loading plate 111.

In this way, the sheet placed on the first transport conveyor 310 enters the clean room 510 along the belt 315 rotated by the rotation of the front and rear rotation rollers 311 and 313. When the sheet enters the inside of the clean room 510, the sensor 411 installed on the cover 410 detects this to operate the air knife 400 installed inside the cover 410, and removes dust. With the operation of the ionizer 450 is to operate.

That is, in the two covers 410 installed on both sides of the clean room 510, the air blocking wall is formed to block the air injected from the air knife 400 from the outside, and thus the clean roller 500 is installed. The interior of the clean room 510 is blocked from the outside.

In addition, the cover 410 is suspended during the transfer of the sheet or the air knife 400 or ionizer 450, the work is suspended, the cover 410 is opened to one side to repair or replace them, etc. Will be able to.

In addition, the sheet conveyed by the first transport conveyor 310 is to prevent the static electricity generated by the ions emitted from the ionizer 450, as well as to facilitate the desorption of foreign matter on the sheet. Subsequently, the sheet enters between the clean rollers 500, and the clean roller 500 adjusts the height of the upper clean roller 550 according to the thickness of each component such as a light guide plate, a diffusion sheet, and a reflective sheet constituting the backlight unit. It is transported in a dull state.

In addition, the lower clean roller 530 and the upper clean roller 550 are rotated by the driving of the motor 532 installed on the lower part of the main frame 502, and the driven sprocket connected by the motor 532 and the chain 533. 534 is rotated, and the spur gear 534a formed in two rows and the spur gear (not shown) formed in two rows are engaged with the lower drive gear 535 to rotate the lower drive gear 535.

Accordingly, the lower driven gear 536 connected to the lower chain 537 rotates, and the lower sprocket 538 rotates as the lower chain 537 rotates, and the roller connected to the lower sprocket 538 rotates. 531 rotates.

Subsequently, the lower clean roller 540 installed to be in surface contact with the roller 531 rotates, and the lower clean roller 540 removes the foreign matter from the lower surface of the sheet by adhering the foreign matter on the roller 531 to the diffusion paper. .

In addition, the lower cylinder 541 coupled to the lower clean roller 540 presses the lower clean roller 540 upwardly to maintain the surface contact state with the roller 531 closely, and the spring 561 installed thereto. The elasticity is imparted to the lower clean roller 540.

As the driven sprocket 534 rotates as described above, the upper clean roller 550 rotates, and the idle gear 552 engaged with the upper portion of the driven sprocket 534 rotates, and the upper portion engaged with the sprocket 534 rotates. The drive gear 553 rotates.

The upper driven gear 554 connected to the upper driving gear 553 and the upper chain 555 rotates, and the upper sprocket coupled to the lower portion of the upper chain 555 as the upper chain 555 rotates. 556 is rotated, the upper roller 551 integrally therewith is rotated.

Accordingly, the upper clean roller 550 installed to be in surface contact with the upper roller 551 is rotated, and foreign matters such as dust deposited on the upper roller 551 from the sheet are adhered to the diffusion paper on the upper clean roller 557 to be removed. . In addition, the installation height of the upper cylinder 558 coupled to the upper clean roller 557 is adjusted according to the thickness of the seat, and the spring 561 coupled with the upper clean roller 557 is elastic to the upper roller 551. Pressurized by.

In addition, the height of the entire upper roller roller 550 is adjusted by the adjustment knobs 559 provided on both sides of the upper cylinder 558 as well as the horizontal state of the upper cleaner roller 550 according to the gauge 560 installed in front of the upper cylinder roller 558. And adjusting the installation height appropriately.

Thus, while passing between the lower clean roller 530 and the upper clean roller 550 removes foreign substances such as dust, organic matter, inorganic matter on the upper and lower surfaces, that is, the surface and the rear surface of the sheet, and the lower clean roller 540 and The upper clean roller 558 winds up a sheet that is easily adhered to the foreign matter on the circumferential surfaces of the rollers 531 and 551 to cut and use the sheet on which the foreign matter is stuck.

In addition, the foreign matter scattered while removing foreign matters such as dust in the clean room 500 is introduced into the dust collector 600 through the duct 601 by the operation of the dust collector 600 installed in the lower portion, the dust collector 600 When the foreign matter is collected in the) through the outlet 602 to maintain a clean state inside the clean room (510).

The sheet thus cleaned is rotated by the rotation of the drive pinion gear 352 coupled to the second transfer conveyor 350 to transfer the sheet to the discharge side to be loaded on the loading plate 702 of the loading device 700, and the cover When detecting that the sheet is discharged by the sensing of the sensor 411 installed in the 410 to transfer the sheet loaded in the sheet feeder 100 by the operation of the first transfer device (200).

In addition, the air is discharged continuously from the air injection pipe 704 so as not to get foreign matter such as dust on the sheet to be loaded on the loading plate 702 as well as release ions from the ionizer 705 to prevent the occurrence of static electricity. .

In addition, the stacking plate 702 is lowered as the sheet is stacked by the amount of the stacking plate 702, and when the stacking plate 702 is lowered to the position of the position sensor 706 installed on the lower side, an alarm sound or By operating a notification means such as a lamp to inform the operator of the discharge of the seat.

When the stacking of the discharged sheet is completed as described above, the operator may transfer the sheet from the stacking plate 702 so that the foreign substance-removed sheet may continue to be stacked.

In addition, the dust removal method of the present invention will be described with reference to the removal device.

As described above, the present invention raises and lowers the stacking plate 111 on which the sheet is loaded by the driving of the motor 103, while the sheet is attached to the vacuum pad 212 by the first transfer device 200. When the sheet 310 is conveyed, and the sheet is conveyed, the second position sensor 122 detects the stacking height of the sheet, and the stacking plate 111 is lifted by the thickness of the sheet. In addition, by spraying air by the air injection pipe 117 installed on the upper plate 116, the foreign matter on the sheet is first removed, and the ionizer 118 is discharged by the ionizer 118 to the stacked sheet and the sheet being transferred. Prevent the generation of static electricity.

As such, when the loading plate 111 is raised, the cylinder 202 is operated to push the cylinder rod 203 forward, and the lifting cylinder 209 is lowered to attach the sheet to the vacuum pad 212 in a vacuum state. It raises, and allows this to enter the clean room 510 into the first transfer conveyor 310, which is the second transfer device 300.

Subsequently, when the sheet enters the clean room 510, the detection sensor 410 installed on the cover 410 detects this, and operates the air knife 400 installed inside the cover 410 to open the sprayed air blocking wall. Form. The air blocking wall is injected from both sides of the clean room 510 to be blocked from the outside.

In addition, the ionizer 450 installed adjacent to the air knife 400 continuously emits ions to prevent static electricity that may occur in the sheet. This causes the sheet to be damaged when static electricity is generated, and facilitates the removal of foreign matter on the sheet.

The sheet to be conveyed then passes between the lower clean roller 530 and the upper clean roller 550 installed in the clean room 510. At this time, the foreign matter adhered to the sheet is attached to the roller 531 and the upper roller 551 to rotate, adhered to the lower clean roller 540 installed to be in surface contact with the lower roller 531, the upper roller 551 ) It is adhered to the upper clean roller (557) which is installed in surface contact with the top to remove foreign substances.

In addition, the lower cylinder 541 adjusts the height of the lower clean roller 530, the upper cylinder 558 adjusts the height of the upper clean roller 550, the adjustment knob 559 provided on both sides of the upper cylinder 558 Adjusts the height of the integrated upper clean roller 550, and the upper cylinder 558 precisely adjusts its horizontal state and height in accordance with the gauge 560.

In addition, as the foreign matter is removed from the sheet, foreign matters are scattered in the clean room 510, and the foreign matters thus scattered are collected into the dust collecting device 600 through the duct 601 installed under the clean room 510, and the outlet 602. Eject through).

When the foreign matter is removed and transported in the clean room 510 as described above, the operation of the air knife 400 installed in the cover 410 is temporarily suspended to allow the sheet to be discharged while the ionizer 450 continuously ions. Release. The sheet cleaned of the foreign matter of the sheet is stacked on the loading plate 702 of the loading apparatus by the second transfer conveyor 350.

In this way, the present invention improves the efficiency of removing foreign matters by removing foreign matters such as dust from the surface of the sheet in a clean room, which is blocked from the outside, and facilitates desorption of foreign matters by ions emitted from the ionizer as well as generating static electricity. It is useful to prevent damage to the sheet due to static electricity.

In addition, a series of processes from supplying to discharging the sheet improves the removal time of foreign substances, thereby increasing work efficiency, and reducing the defect rate of the liquid crystal display by removing the foreign matter attached to the sheet.

Claims (8)

A sheet feeding step of lifting and lowering to feed the stacked sheets on the loading plate, Transferring the sheet loaded on the raised loading plate to a clean room by suction of a vacuum pad, When the sheet enters the clean room, an air blocking step of blocking the outside and the clean room by forming an air blocking wall with air injected into both sides of the clean room, An ion release step of releasing ions from the ionizer to prevent static electricity from being supplied to the sheet, A foreign material removal step of removing foreign substances such as dust and dirt from the sheet while the conveyed sheet passes through the rollers installed at the upper and lower parts; A dust collecting step of collecting the foreign matter together with the air injected from the air knife; When the removal of the foreign matter of the sheet is completed, the air knife and ionizer intermittent step of releasing the ion of the ionizer while giving priority to the air blowing of the air knife, And a discharge step of discharging the cleaned sheet. The method of claim 1, The air injection is appropriately interrupted during the conveyance of the seat by the air injection pipe and the air knife, the ion release of the ionizer is made continuously dust removal method of the backlight unit. A sheet feeder which raises the stacking plate by the height of the sheet when the sheets stacked on the stacking plate are conveyed one by one by the first feeder; A first transfer device for transferring the supplied sheet one by one to a second transfer device by vacuum attachment of a vacuum pad; A second transfer device for transferring the sheet supplied from the first transfer device to a discharge side while the foreign material such as dust is removed while passing through the clean room; An air knife for forming an air barrier wall on both sides of the clean room when the sheet enters the clean room by the second transfer device; An ionizer installed on one side of the air knife to release ions so that static electricity does not occur in the conveyed sheet; And the clean roller to remove the foreign matter is adhered to the foreign matter, such as dust adhered to the sheet while the conveyed sheet is passed, And a stacking device for transporting and stacking the sheet from which the foreign matter is removed to the discharge side. The method of claim 3, The sheet feeder is provided with a load sensor for detecting the loading state of the sheet on the upper surface of the loading plate, a first position sensor for detecting the rising state of the loading plate on the top of the front plate, Dust removing device of the backlight unit, characterized in that the second position sensor for detecting the falling state of the loading plate in the lower portion. The method of claim 3, The clean roller is a dust removal device of the backlight unit, characterized in that for cutting the sheet wound to facilitate the attachment of foreign substances such as dust. The method of claim 3, And a dust collecting device for collecting and discharging the foreign matter such as dust removed from the sheet under the clean roller. The method of claim 3, The clean roller is provided with a cylinder to adjust the height of the clean roller interlocked with a plurality of lower rollers at the bottom, the backlight is characterized in that the cylinder is installed to adjust the height of the clean roller interlocked with the plurality of upper rollers Dust removal unit of the unit. The method of claim 3, The air knife is dust removal device of the backlight unit, characterized in that installed to adjust the angle of the air is sprayed.

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