KR100813334B1 - Apparatus for cleaning glass tube for backlight unit - Google Patents

Abstract

A cleaning device of a glass tube for a backlight unit is provided to adjust a support height of the glass tube by controlling an elevation controller, when a diameter of the glass tube is changed. A glass tube having a protective film and a fluorescent layer is supplied to a frame(100). A conveyor(200) transfers the glass tube on the frame at a constant pitch. Elevation rotating units(300) are implemented at both sides of the frame, and move the glass tube apart from the conveyor. The elevation rotating unit supports both ends of the glass tube and rotates the glass tube. An elevation adjuster(400) selectively elevates the elevation rotating unit to adjust an elevation height of the elevation rotating unit. A glass tube pressing unit(500) presses the glass tube from an upper direction to fix the glass tube. A glass tube cleaner(600) is implemented at one side of the frame and cleanses one end of the fixed glass tube.

Description

Glass tube cleaning device for backlight unit {APPARATUS FOR CLEANING GLASS TUBE FOR BACKLIGHT UNIT}

The present invention provides a backlight unit for cleaning one end of a glass tube for a Cold Cathode Fluorescent Lamp (CCFL) or an External Electrode Fluorescent Lamp (EEFL) used in a flat panel display (FPD). It relates to a cleaning device for a glass tube for use.

In general, flat panel display devices are classified into light emitting and light receiving types, and light emitting display devices using plasma display panels (PDP) and PL (Cathode Luminescence) using PL (Photo Luminescence) as phosphors. (FED, Field Emission Display) and the like, and the light-receiving type includes a liquid crystal display (LCD).

Since the liquid crystal display itself does not emit light to form an image, but receives light from the outside to form an image, the liquid crystal display device provides a separate light source, for example, a backlight, so that the image can be observed in a dark place.

The backlight for liquid crystal display devices includes a direct light type in which a plurality of fluorescent lamps are arranged under the liquid crystal in a planar manner, and an edge light type in which a fluorescent lamp is installed at the side of the light guide plate according to the installation form of the fluorescent lamp. type). The fluorescent lamp may be a cold cathode fluorescent lamp having electrodes at both ends in a glass tube, and an external electrode fluorescent lamp having electrodes at both ends in addition to the glass tube.

Both the cold cathode fluorescent lamp and the external electrode fluorescent lamp are filled with a certain amount of gas and mercury for driving the light emission in the glass tube for the fluorescent material coated lamp, and two electrodes are formed inside or outside the glass tube. When the fluorescent lamps are applied with high voltage to two internal or external electrodes at both ends, electrons existing in the glass tube for the lamp are moved to the positive electrode side and collide with each other to emit secondary electrons. Due to such a discharge phenomenon, electrons and mercury atoms flowing inside the lamp glass tube collide with each other to emit ultraviolet light of about 253.7 nm, and the ultraviolet light excites the fluorescent material to emit visible light.

Here, in general manufacturing apparatuses of cold cathode fluorescent lamps, a phosphor coating device for largely applying phosphors to a glass tube, a cleaning device for washing one end of a glass tube coated with phosphors, and a phosphor coated inside a glass tube are contained. Baking apparatus for removing the organic matter, an electrode sealing apparatus for forming a getter room for forming a getter insert while forming electrodes at both ends of the glass tube, and vacuum exhaust and gas cleaning in the interior of the glass tube where the electrodes are formed at both ends to remove impure gas. An exhaust injection device that removes and injects discharge gas and mercury to seal the getter room, a sealing cutting device that seals the electrode sealed to one end of the glass tube and cuts the getter room to form a lamp, and by high frequency Heating device for diffusing mercury injected into getters into the lamp as a whole Applying a voltage to the inverter for easing the aging comprises a device for stabilizing the light-on state.

In particular, the conventional cleaning apparatus for cleaning one end of the glass tube through a coating device for applying a protective film and a fluorescent layer on the inner surface of the glass tube includes a glass tube washing unit for rotating the glass tube to wash the glass tube using a brush.

6 is a side view illustrating a glass tube washing unit having an inner diameter brush of a conventional cleaning apparatus for a glass tube for a backlight unit.

The glass tube washing unit is provided with a movable plate 32 on a support plate 31 fixed to a frame, and a pair of brush chucks 33 and a driving motor 34 are installed on the movable plate 32 to provide a timing belt. Drive force is transmitted by the, and the movable plate 32 is made of an expansion and contraction cylinder 35 to move forward and backward along the rail, the inner diameter brush 36 brush holder 37 is installed is fitted to the brush chuck 33 do. In addition, the moving plate 32 is provided with a gauging jig 38 for setting the position of the glass tube 10 to be conveyed, so that the cleaning dimension is uniform, and the lower part of the chuck 33 generates phosphor dust during cleaning. Suction plate (39) connected to the suction dust collector is installed to remove the dust generated and to remove the phosphor powder on the inner diameter brush 36 to increase the cleaning efficiency. The rotating glass tube 10 fixes the washing position of the rotating glass tube 10 using a plurality of fixing chucks 40. By replacing the inner diameter brush 36 with a known end face or outer diameter brush in the above configuration, it is possible to wash the end face or outer diameter of the glass tube 10.

The glass tube cleaned with the phosphor is transferred to the electrode sealing apparatus through a baking apparatus to remove the organic substances contained in the fluorescent liquid to seal the electrode.

However, the conventional cleaning device as described above can only clean the glass tube of a certain diameter, when the diameter of the supplied glass tube is changed, there is a problem that the work efficiency is reduced, such as setting the new work equipment according to the diameter of the glass tube have.

In addition, a plurality of fixing chucks must be installed to fix the rotating glass tube, and the rotation of the glass tube is interfered by the plurality of fixing chucks or the glass tube is broken.

In addition, there is a problem in that it is difficult to clean clean only by washing with a rotary brush when the glass tube is washed, and thus, a phosphor or a foreign substance remains in the glass tube, thereby increasing a defect rate.

The present invention has been made to solve the above problems, and even if the diameter of the glass tube supplied changes the cleaning device for the glass tube for the backlight unit that can be cleaned through a simple operation without the need to set the whole new work equipment It aims to provide.

In addition, an object of the present invention is to provide a cleaning device capable of easily fixing a rotating glass tube when the glass tube is washed, so that the glass tube can be precisely washed.

In addition, it is an object of the present invention to provide a cleaning device that can remove the foreign matter on the inner surface of the glass tube in advance to easily wash the inner diameter with an inner diameter brush, and can clean the glass tube more cleanly, significantly reducing the failure rate.

Other objects, specific advantages and novel features of the invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

In order to achieve the above object, the apparatus for cleaning a glass tube for a backlight unit of the present invention includes a frame to which a glass tube coated with an inner surface of a protective film and a fluorescent layer is supplied, and a conveying unit for transferring the supplied glass tube to a predetermined pitch on the frame. And lifting and lowering parts which are respectively installed to face each other on both sides of the frame so as to be able to move up and down to separate the glass tube from the conveying part and simultaneously support and rotate both ends of the glass tube, and selectively raise and lower the roller part. Lifting control unit for adjusting the lifting height of the roller portion, and the glass tube pressing portion which is installed to be able to move up and down above the lifting and rotating portion, the glass tube supported by the lifting and rotating portion to rotate from above to fix the position of the glass tube; Is installed on one side of the frame, one end of the glass tube It comprises parts of the glass tube to the chuck cleaning.

The apparatus may further include a dryer installed at the frame in front of the glass tube washing unit to dry one end of the glass tube.

The apparatus may further include a push rod configured to push the other end of the glass tube so that the glass tube is installed and transferred to the other side of the frame to face the glass tube washing unit.

The transfer unit may include a pair of chains provided on both sides of the frame to circulate both ends of the frame, a sprocket rotatably provided on the frame to circulate the pair of chains, and the sprocket to rotate. A first driving motor and a gripping groove are formed to fix the glass tube, and a plurality of glass tube holders are coupled to the pair of chains at predetermined intervals.

In addition, it characterized in that it further comprises a chain support coupled to the frame to respectively support the lower portion of the pair of chains.

In addition, the elevating rotation unit, the first sub-frame, each adjacently arranged to cross zigzag adjacent to form a support bone to support the glass tube, but the support bone is formed in a plurality in parallel along the transport direction of the glass tube And a plurality of rotating rollers installed in the first subframe, a second driving motor for rotating the plurality of rotating rollers, and an elevating cylinder for elevating the first subframe.

In addition, the elevating control unit is characterized in that the second elevating cylinder for raising and lowering the elevating cylinder in accordance with the diameter of the glass tube installed in the lower portion of the elevating cylinder.

In addition, the elevating control unit is in close contact with the lower portion of the elevating cylinder is rotatably installed, and the adjustment cam of a polygonal column shape of each side is different in length so as to elevate the elevating cylinder in accordance with the diameter of the glass tube transferred. And, characterized in that it comprises a rotary lever for rotating the adjustment cam.

In addition, the glass tube pressing portion is characterized in that it comprises a second subframe provided above the lifting and lowering rotation portion, and a pressing roller provided on the second subframe to press the glass tube.

In addition, the glass tube pressing portion, characterized in that it further comprises a spring installed on the second sub-frame to elastically support the pressing roller.

The glass tube washing unit may further include a cross-sectional brush for washing the end surface of one end of the glass tube, a first outer brush for washing the outer diameter of one end of the glass tube, an inner diameter brush for washing the inner diameter of the one end of the glass tube, and an outer diameter of the one end of the glass tube. It comprises a second outer diameter brush for washing, characterized in that the cross-sectional brush, the first outer diameter brush, the inner diameter brush and the second outer diameter brush are installed in sequence.

The glass tube washing unit may further include a cemented carbide brush disposed between the first outer diameter brush and the inner diameter brush, the cemented carbide brush washing the lower end of the inner surface of the rotating glass tube.

In addition, the carbide brush, characterized in that the rod can be raised and lowered in conjunction with the elevating control unit, the rod-shaped is installed to be inserted into the inside of the glass tube.

In the cleaning apparatus of the glass tube for a backlight unit according to the present invention, even if the diameter of the supplied glass tube is changed, the support height of the glass tube can be adjusted by simple operation of the lifting control unit.

In addition, when the glass tube is washed, the rotating glass tube can be easily fixed by the glass tube pressing portion provided with the pressing roller, so that the glass tube can be washed precisely.

In addition, by removing the foreign matter on the inner surface of the glass tube through the carbide brush in advance can easily wash the inner diameter with the inner diameter brush, it is possible to clean the glass tube more clean.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the cleaning device for a glass tube for a backlight unit according to the present invention.

1 is a front view showing a preferred embodiment of the cleaning device of the glass tube for the backlight unit of the present invention, Figure 2a is a front view showing the conveying portion, the lifting rotating portion, the lifting control portion, the glass tube washing portion and the glass tube pressing portion of the embodiment of FIG. 2B is a front view illustrating a state in which the glass tube washing unit is removed in the embodiment of FIG. 2A, and FIG. 2C is a front view illustrating a state in which the glass tube pressing unit is removed in the embodiment of FIG. 2A, and FIG. 3 is a view of the embodiment of FIG. 2A. 4A to 4B are front views illustrating an operation process of the cleaning apparatus for the glass tube for the backlight unit according to the embodiment of FIG. 1, and FIG. 5 is a layout relationship of the transfer unit, the lifting rotating unit, and the glass tube pressing unit of the embodiment of FIG. 1. It is a perspective view shown.

As shown in FIGS. 1 and 3, the apparatus for cleaning a glass tube for a backlight unit of the present invention includes a frame 100, a transfer unit 200, a lift rotation unit 300, a lift control unit 400, and a glass tube press unit 500. And a glass tube washing unit 600, and may further include a chain support 150, a dryer 700, and a push rod 800. The transfer part 200 may include a chain 220, a sprocket 240, a first driving motor 260, and a glass tube holder 280. The lifting and lowering part 300 may include a first subframe 320, It may include a rotary roller 340, the second drive motor 360 and the lifting cylinder 380, the glass tube pressing portion 500 is the second subframe 520, the pressing roller 540 and the spring ( And 560.

The frame 100 receives a glass tube 10 coated with a protective film and a fluorescent layer on an inner surface thereof through an application device, and is formed along a conveying direction of the glass tube 10. Since various components described later are attached to the frame 100, the frame 100 is preferably made of a rigid body such as a metal material. As shown in FIG. 3, when the glass tube 10 is supplied and aligned to the frame 100, one end of the glass tube 10 to be cleaned faces the same direction on the frame 100 to be described later. The part 600 allows one end of the glass tube 10 to be automatically cleaned.

The transfer unit 200 transfers the glass tube 10 supplied to the frame 100 at a constant pitch on the frame 100. As shown in FIG. 1, the transfer part 200 includes a glass tube holder 280 that supports the glass tube 10, a chain 220 which transfers the glass tube holder 280, and a sprocket 240 which circulates the chain 220. And a first driving motor 260 for driving the sprocket 240.

As shown in FIG. 5, the glass tube holder 280 stably transports the glass tube 10, and a gripping groove 285 is formed to fix the glass tube 10. The gripping groove 285 preferably has a 'V' shape, such that the glass tube 10 does not move in the left and right directions of the gripping groove, and the glass tube 10 is always the center of the gripping groove 285 due to gravity. Towards the top, the top is open to facilitate loading and removal.

1 and 3, the chain 220 is provided side by side on both sides of the frame 100 to circulate both ends of the frame 100 is operated in an orbital manner. In addition, the chain 220 provided in pairs on both sides of the frame 100 is provided with a plurality of glass tube holders 280 at regular intervals, so that the glass tube 10 provided in the frame 100 is continuously provided at a constant pitch. Can be transferred to. That is, the glass tube holder 280 is fastened to each link constituting the chain 220 so that the glass tube holder 280 moves as the chain 220 rotates.

The chain 220 may be sag due to the weight of the chain 220 in the process of moving the frame 100. In order to prevent this, the chain 220 is provided with a chain support 150 in the frame 100, so that the chain It is desirable to support 220. That is, as shown in FIG. 1, the chain support 150 is coupled to the frame 100 so as to respectively support the lower portions of the pair of chains 220 traveling in the direction of transporting the glass tube 10.

The driving means is required to drive the chain 220 circulating in the caterpillar manner as described above. That is, the power transmission means for connecting the sprocket 240, the first drive motor 260 for driving the sprocket 240, and the sprocket 240 and the first drive motor 260, for example a drive chain 250 ), A belt, a gear, and the like, and the sprocket 240 is engaged with the chain 220 so that the first driving motor 260 rotates, thereby circulating the chain 220 in the frame 100.

As shown in FIGS. 4A to 4D and 5, the elevating rotation unit 300 is installed to face each other at both sides of the frame 100 to separate the glass tube 10 from the transfer unit 200. Simultaneously with both ends of the glass tube 10 is supported and rotated. The lifting and lowering part 300 is disposed to cross the first subframe 320 and each other in a zigzag adjacent to each other to form a support bone 345 that can support the glass tube 10, but the support bone 345 A second driving motor for rotating the plurality of rotating rollers 340 and the plurality of rotating rollers 340 provided in the first subframe 320 so that a plurality of the side by side along the transport direction of the glass tube 10 is formed. 360, and a lifting cylinder 380 for lifting up and down the first subframe 320. Lifting and rotating unit 300 is positioned adjacent to the portion to be cleaned on the frame 100, the glass tube 10 is transported, that is, the glass tube washing unit 600 to be described later.

In order to support the glass tube 10, a plurality of rotating rollers 340 are installed so as to cross each other adjacently zigzag as shown in FIG. That is, the two rotary rollers 340 overlap the center of the roller rotation axis so as to form a support bone 345 for supporting the glass tube 10, and in this way the support bone 345 is the glass tube 10 A plurality of rotary rollers 340 are installed so that a plurality is formed side by side along the conveying direction of the. The glass tube 10 is transported and supported on the support bone 345 formed by the plurality of rotating rollers 340, and the glass tube 10 also rotates with the rotation of the plurality of rotating rollers 340. The spacing of the support bones 345 formed by the plurality of rotating rollers 340 is a transport interval of the glass tube 10, ie, a glass tube holder, which is transported at a constant pitch by the transport unit 200. The interval is equal to 280. Each of the plurality of rotating rollers 340 rotates in the same direction as another adjacent rotating roller 340, and the glass tube 10 supported by the rotating roller 340 is rotated in the opposite direction to the rotating roller 340. .

In order to rotate the rotary roller 340, a second drive motor 360 is required, and the second drive motor 360 may directly drive the rotary roller 340, but is provided with a power transmission means The rotary roller 340 may be driven together. For example, there are a plurality of roller drive sprockets connected to the roller drive chain, the roller drive chain connected to the second drive motor 360, and installed on the drive shafts of the plurality of rotary rollers 340 as the power transmission means. Accordingly, the roller drive chain is circulated by the rotation of the second drive motor 360, the roller sprocket is rotated by the circulation of the drive chain, and the rotating roller 340 coaxial with the roller sprocket is rotated. As a result, the glass tube 10 supported by the rotating roller 340 is rotated.

As shown in FIG. 4B, the lifting cylinder 380 lifts the first subframe 320 to separate the glass tube 10 transferred by the transfer unit 200 from the transfer unit 200. That is, when the lifting cylinder 380 raises the first subframe 320, the rotating roller 340 installed in the first subframe 320 is raised, and the lifting roller 340 is raised to the transfer unit 200. The gripped glass tube 10 is supported by the rotary roller 340 to be spaced apart from the transfer part 200. The glass tube 10 which is lifted by the elevating chamber 380 and spaced apart from the conveying part 200 is supported by the rotating roller 340 and rotated, and is pressed by the glass tube pressing unit 500 to be described later and rotated by the rotating roller 340. ) Is supported and the rotating position is fixed.

As shown in FIGS. 4B and 5, when the lifting and lowering rotation part 300 is elevated, the glass tube rotated by the rotating roller 340 by raising the position where the glass tube 10 is supported higher than the transfer part 200. 10 to be separated upward from the transfer unit 200. That is, when the glass tube 10 is supported and rotated by the support bone 345 formed by the rotary roller 340 of the elevating rotation part 300, the glass tube 10 is supported by the glass tube holder 280 of the transfer part 200. In this case, the position where the glass tube 10 is supported is higher than that in which the glass tube 10 is spaced upward from the glass tube holder 280. Accordingly, the glass tube 10 may be freely rotated by the lifting and lowering part 300 without interfering with the transfer part 200 during the rotation.

Lifting control unit 400 to adjust the lifting height of the lifting and lowering rotation unit 300 by selectively lifting and lowering the lifting rotation unit (300). It is necessary to adjust the lifting height of the lifting lowering rotation part 300 in accordance with the change in the diameter of the glass tube 10 which is supported by the lifting lowering rotation part 300 and rotates. Even if the diameter of the glass tube 10 supported and supported by the elevating rotation unit 300 is changed, the elevating rotation unit 300 itself is moved to the glass tube 10 such that the center of the circle viewed from the cross section of the glass tube 10 coincides with the glass tube 10 having a different diameter. This is to move up and down according to the change in diameter. Whenever the diameter of the glass tube 10 is changed, the elevating rotation unit 300 may be raised and lowered by the elevating adjustment unit 400 so as to match the position of the circle center of the glass tube 10 to be transported. Accordingly, only the brush installed in each brush constituting the glass tube washing unit 600 to be described later may be replaced according to the diameter change of the glass tube 10.

As shown in FIG. 2, the elevating adjustment unit 400 is rotatably installed in close contact with the lower portion of the elevating cylinder 380 and moves the elevating cylinder 380 according to the diameter of the glass tube 10 transferred. It may include an adjustment cam 450 having a polygonal column shape having a different length of each side to move up and down, and an adjustment lever 455 for rotating the adjustment cam 450. The adjustment cam 450 has a polygonal column shape having a different length of each side, and thus the length of the vertical line lowered perpendicularly to each side from the rotation center of the adjustment cam 450 is different. Therefore, when the adjustment cam 450 is rotated according to the diameter of the glass tube 10 transferred to form the adjustment cam 450 in advance according to the diameter of the glass tube 10, the lifting cylinder ( 380 is raised and lowered, thereby matching the position of the circle center viewed from the cross section of each of the glass tubes 10 having different diameters. The adjustment cam 450 can be rotated using the control lever 455, and the drive to rotate the control cam 450 in accordance with the rotation of the control lever 455 to more easily rotate the control cam 450. Means may be provided. As shown in FIG. 2, the adjustment lever 455 may be directly attached to the adjustment cam 450 and rotated, or a gear box may be provided between the adjustment lever 455 and the adjustment cam 450, or a driving motor may be used. have. Since the lifting height of the first subframe 320 in which the rotary roller 340 is installed by the lifting cylinder 380 is constant, the lifting height of the entire lifting shaft 300 can be adjusted by lifting the lifting cylinder 380. In addition, the elevating control unit 400 may be elevating the elevating cylinder 380 according to the diameter of the glass tube 10 in any configuration.

As shown in FIGS. 2B and 4B, the glass tube pressing unit 500 is installed above the elevating rotation unit 300 to press the glass tube 10 that is supported by the elevating rotation unit 300 and rotates upward. The glass tube 10 is supported by the elevating rotation unit 300 to fix the position to rotate. The glass tube 10 is transferred to the transfer unit 200 to reach the position where the glass tube washing unit 600 is installed, and is raised and supported by the lifting and lowering unit 300 to rotate. The glass tube 10 raised by the elevating rotation unit 300 is pressed from above while being rotated by the glass tube pressing unit 500 to fix the position of the glass tube 10.

The glass tube pressing unit 500 includes a second subframe 520 installed above the elevating rotation unit 300, and a pressing roller 540 installed on the second subframe 520 to press the glass tube 10. ) May be included. Since the pressing roller 540 for pressing the glass tube 10 from above is rotatably installed, the glass tube 10 continues to rotate even when the glass tube 10 is pressed. Accordingly, the glass tube 10 is supported by the lifting and lowering portion 300 to rotate from below, and is pressed by the pressing roller 540 from above, so that the glass tube 10 is fixed while the glass tube 10 rotates. The position of the glass tube 10 is fixed, the glass tube 10 may be precisely washed by the glass tube washing unit 600 to be described later. In addition, the glass tube pressing unit 500 may further include a spring 560 installed in the second subframe 520 to elastically support the pressing roller 540. Accordingly, even if the diameter of the glass tube 10 changes, the pressing roller 540 elastically presses the glass tube 10 so that the glass tube 10 is not broken, and the pressing roller 540 is in close contact with the glass tube 10. The glass tube 10 can be fixed more firmly.

Glass tube washing unit 600 is installed on one side of the frame 100 to wash one end of the glass tube (10). The glass tube washing unit 600 includes a cross-sectional brush 620 for washing the end surface of one end of the glass tube 10, a first outer diameter brush 640 for washing the outer diameter, and an inner diameter brush 660 for washing the inner diameter. The second outer diameter brush 680 may further include washing the outer diameter, and the cross-sectional brush 620, the first outer diameter brush 640, the inner diameter brush 660, and the second outer diameter brush 680 may be sequentially formed. Is installed. The cross-sectional brush 620 is to clean the end surface of one end of the glass tube 10, using a cross-sectional brush larger than the diameter of the glass tube 10 so that it does not need to be replaced even if the diameter of the glass tube 10 changes. The first outer diameter brush 640 and the second outer diameter brush 680 are to wash the upper end of the outer peripheral surface of the rotating glass tube 10, so that when the diameter of the glass tube 10 changes, the outer diameter brush can be replaced accordingly. . The inner diameter brush 660 is to wash the inner circumferential surface of the glass tube 10, so that the inner diameter brush is inserted to match the center of the circle of the cross section of the glass tube 10, if the diameter of the glass tube 10 is changed to replace the inner diameter brush accordingly To help. Each brush is the same as the configuration of the conventional general cross section, the inner diameter and the outer diameter brush described above, detailed description thereof will be omitted.

The glass tube washing unit 600 is installed between the first outer diameter brush 640 and the inner diameter brush 660, and further comprises a cemented carbide brush 650 made of cemented carbide for cleaning the foreign matter formed in the inner diameter of one end of the glass tube 10. It may include. The inner diameter of the glass tube 10 may be washed better by removing foreign substances formed in the inner diameter of the glass tube 10 before washing the inner diameter of the glass tube 10 in which the first outer diameter cleaning is performed by the first outer diameter brush 640. Can be. In addition, the carbide brush 650 is raised and lowered in conjunction with the lifting control unit 400, it may be a rod shape. That is, the carbide brush 650 does not rotate in the shape of a rod, but is in contact with the lower portion of the inner circumferential surface of the relatively rotating glass tube 10 is to be washed. When the diameter of the glass tube 10 is changed, the center of the circle of the cross section of the glass tube 10 should be matched with another glass tube 10 by the elevating adjusting unit 400, and the height of the cemented carbide brush 650 by the height difference thereof. Carbide brush 650 in conjunction with the lifting control unit 400 should be able to move up and down because it should be changed. The carbide brush by driving the linear motor connected to the cemented carbide brush 650 as much as the lifting height measured by the micrometer and the lifting height of the lifting cylinder 380 by the lifting adjustment unit 400. There is a method for elevating 650, and any method is sufficient as long as it can elevate the cemented carbide brush 650 by the height to be elevated by the elevating adjustment unit 400.

As shown in FIG. 1, the dryer 700 is installed in the frame 100 in front of the glass tube washing unit 600 to dry one end of the glass tube 10. Dryer 700 is installed to prevent dropping of the phosphor and cleaning failure when washing the coating film coated on the inner surface of the glass tube 10 that has passed through the phosphor coating device, and the glass tube 10 with hot air through a heater or the like. It is to dry the inner surface.

The push rod 800 pushes the other end of the glass tube 10 so that the glass tube 10 is installed in front of each brush constituting the glass tube washing unit 600 is aligned. That is, since the glass tube 10 may change the position of the glass tube 10 after the transfer or cleaning by each brush, the glass tube 10 by the push rod 800 to move it to the correct cleaning position of each brush. To sort them.

Hereinafter, the operation of a preferred embodiment of the cleaning apparatus for a glass tube for a backlight unit according to the present invention will be described with reference to FIGS. 4A to 4E.

The glass tube 10 for the backlight unit having the protective film and the fluorescent layer coated on the inner surface through the phosphor coating device is provided on the frame 100 and aligned. At this time, the glass tube 10 is supported by the transfer unit 200 installed in the frame 100 and is transferred at a constant pitch from one end to the other end of the frame 100. That is, the glass tube 10 is transferred from the right side to the left side on the basis of FIG. 4.

The glass tube 10 is conveyed in one direction by a chain 220 circulating the frame 100, and is accommodated in the gripping groove 285 of the glass tube holder 280, and the glass tube 10 and the glass tube holder 280 are transported. Is transferred in contact with each other, and first passes through the dryer 700 to dry the fluorescent layer formed on the inner surface of the glass tube 10.

As shown in FIG. 4A, the glass tube 10 being transferred by the transfer unit 200 enters an area in which the elevating rotating unit 300, the glass tube pressing unit 500, and the glass tube washing unit 600 are provided. The operation of the push rod 800 immediately before or immediately after entering the area allows the position of one end of the glass tube 10 to be aligned to the correct position to be cleaned.

As shown in FIG. 4B, the lifting lowering and rotating unit 300 raises and lowers the glass tube 10 from the glass tube holder 280 of the transfer unit 200. In addition, the glass tube 10 is supported and rotated by a plurality of rotating rollers 320 that are rotated by the second drive motor 340 while being lifted by the lifting and lowering part 300. When each of the plurality of rotating rollers 320 rotates in the same direction, the glass tube 10 rotates in the opposite direction to the rotating roller 320. That is, since the glass tube 10 and the rotary roller 320 are in contact with each other, the glass tube 10 rotates in a direction opposite to the rotation of the rotary roller 320. The glass tube 10 is lifted by the elevating rotation unit 300 and the glass tube press unit 500 is pressed against the upper end of the outer circumferential surface of the glass tube 10 which is rotated so that the glass tube 10 is fixed from the elevating rotation unit 300. Let's do it. However, even in this case, the pressing roller 540 rotatably installed so that the rotation of the glass tube 10 is continued is to press the upper end of the glass tube 10. In this case, according to the diameter change of the glass tube 10, the spring 560 is compressed or stretched so that the pressure roller 540 elastically fixes the glass tube 10.

As shown in FIG. 4C, the glass tube 10 constituting the glass tube washing unit 600 includes a glass tube 10 which is lifted and supported by the lifting and lowering unit 300 in FIG. 4B and rotated, and whose position is fixed by the glass tube pressing unit 500. Each brush cleans one end of the rotating glass tube 10. Section, outer diameter and inner diameter washing method can be implemented in the prior art, so the detailed description thereof will be omitted. However, as shown in FIG. 5, when cleaning the cemented carbide, foreign substances, etc. formed on the lower inner surface of the glass tube 10 by the rod-shaped cemented carbide brush 650 are washed in advance.

As shown in FIG. 4D, the glass tube 10 washed by the glass tube washing unit 600 in FIG. 4C is lowered by the lifting and lowering unit 300 and seated on the transfer unit 200. Accordingly, the glass tube 10 proceeds to the next step by the transfer part 200, and the process of FIGS. 4A to 4D is repeatedly repeated.

On the other hand, the cleaning of the glass tube 10 is completed and the glass tube 10 seated on the conveying unit 200 is sequentially continued toward the baking device, electrode sealing device, exhaust injection device, sealing cutting device, heating device, aging device Transferred.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

1 is a front view showing a preferred embodiment of the cleaning apparatus of the glass tube for a backlight unit of the present invention,

Figure 2a is a front view showing the conveying part, the lifting rotary part, the lifting control unit, the glass tube washing portion and the glass tube pressing portion of the embodiment of Figure 1,

Figure 2b is a front view showing a state in which the glass tube washing portion removed in the embodiment of Figure 2a,

Figure 2c is a front view showing a state in which the glass tube pressing portion removed in the embodiment of Figure 2a,

3 is a plan view of the embodiment of FIG. 2A;

4A to 4B are front views illustrating an operation process of the cleaning apparatus of the glass tube for the backlight unit according to the embodiment of FIG. 1;

FIG. 5 is a perspective view illustrating an arrangement relationship between a conveying part, a lifting rotating part, a glass tube pressing part, and a carbide brush in the embodiment of FIG. 1,

FIG. 6 is a side view illustrating a glass tube washing unit of a conventional cleaning apparatus for a glass tube for a backlight unit. FIG.

Description of the main symbols in the drawings

10: glass tube

100: frame 150: chain support

200: transfer unit 220: chain

240: sprocket 260: first drive motor

280: glass tube holder 285: gripping groove

300: lifting and lowering unit 320: the first subframe

340: rotating roller 345: support bone

360: second drive motor 380: lifting cylinder

400: lifting control unit 450: control cam

455: Control lever

500: glass tube pressing unit 520: second subframe

540: pressure roller 560: spring

600: glass tube washing unit 620: section brush

640: first outer diameter brush

650: Carbide Brush

660: inner diameter brush 680: second outer diameter brush

700: Dryer

800: push rod

Claims (12)

A frame supplied with a glass tube coated with a protective film and a fluorescent layer on an inner surface thereof, A transfer part for transferring the supplied glass tube to a constant pitch on the frame; A lifting and rotating unit which is installed at both sides of the frame so as to be able to ascend and descend to each other so that the glass tube is spaced apart from the transfer unit and supports and rotates both ends of the glass tube; An elevating adjustment unit for selectively elevating the elevating rotating unit to adjust an elevating height of the elevating rotating unit; A glass tube pressing portion which is installed above the elevating rotation part and presses the glass tube that is supported and rotates on the elevating rotation part from above to fix the position of the glass tube; And a glass tube washing unit installed at one side of the frame to wash one end of the glass tube which is fixed in position. The method of claim 1, And a dryer installed on the frame in front of the glass tube washing unit to dry one end of the glass tube. The method of claim 1, And a push rod configured to push the other end of the glass tube so that the glass tube, which is installed and transferred to the other side of the frame, is opposed to the glass tube washing unit. The method of claim 1, The transfer unit, A pair of chains provided side by side on both sides of the frame to circulate both ends of the frame, A sprocket rotatably provided on the frame to circulate the pair of chains; A first driving motor for rotating the sprocket, And a holding groove is formed to fix the glass tube, and includes a plurality of glass tube holders coupled to the pair of chains at predetermined intervals. The method of claim 4, wherein And a chain support coupled to the frame so as to support the lower portions of the pair of chains, respectively. The method of claim 1, The lifting rotating unit, The first subframe, A plurality of rotating rollers installed in the first subframe such that a plurality of supporting bones are formed adjacent to each other and intersect in a zigzag to support the glass tube, and a plurality of supporting bones are formed side by side along the conveying direction of the glass tube; , A second driving motor for rotating the plurality of rotating rollers; And a lift cylinder for lifting and lowering the first subframe. The method of claim 6, The lifting control unit, The lifting cylinder is moved in close contact with the lower part of the lifting cylinder, and the lifting cylinder is lowered to match the position of the circle center of the glass tube according to the diameter of the glass tube when the transferred glass tube is lifted by the lifting rotating unit. With an adjustable cam, And a rotating lever for rotating the adjustment cam. The method of claim 1, The glass tube pressing portion, A second subframe provided above the elevating rotation part, And a pressing roller installed on the second subframe to press the glass tube. The method of claim 8, The glass tube pressing portion, And a spring installed in the second subframe to elastically support the pressing roller. The method of claim 1, The glass tube washing unit, Cross section brush for washing the end surface of the glass tube, A first outer diameter brush for washing the outer diameter of one end of the glass tube, An inner diameter brush for washing the inner diameter of one end of the glass tube, A second outer diameter brush for washing the outer diameter of one end of the glass tube, And the end face brush, the first outer diameter brush, the inner diameter brush, and the second outer diameter brush are sequentially installed. The method of claim 10, The glass tube washing unit, And a cemented carbide brush disposed between the first outer diameter brush and the inner diameter brush, the cemented carbide brush washing the lower end of the rotating inner surface of the glass tube. The method of claim 11, The carbide brush, A device for cleaning a glass tube for a backlight unit, which can move up and down in conjunction with the elevating control unit, and has a rod shape installed to be retractable into the glass tube.

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