KR100786394B1 - Apparatus for sealing and cutting glass tube for backlight unit - Google Patents

Abstract

An apparatus for sealing and cutting a glass tube for a backlight unit is provided to seal and cut the glass tube while rotating the glass tube through a roller unit to perform a sealing and cutting process of the glass tube stably. Glass tubes(10) are supplied to a frame(100), wherein each of the glass tubes has a provisionally sealed electrode. A transfer unit(200) transfers the glass tubes onto the frame at a uniform pitch. Roller units(300) are installed at both sides of the frame to support and rotate both end portions of the glass tube. A torch is installed at the frame to heat the provisionally sealed portion of the glass tube. A cutting unit(500) is installed at the frame to cut the provisionally sealed portion of the glass tube. Elevating blocks are respectively installed at both sides of the frame. The elevating blocks repeat a process of loading the glass tube on the roller units from the transfer unit by elevating both end portions of the glass tube and transferring the elevated glass tube and a process of loading the cut glass tube on the transfer unit from the roller unit.

Description

Sealing device for glass tube for backlight unit {APPARATUS FOR SEALING AND CUTTING GLASS TUBE FOR BACKLIGHT UNIT}

The present invention is a backlight unit for sealing 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 sealing cutting device for glass tubes.

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.

Briefly describing a series of processes for the manufacture of the fluorescent lamp, the process of coating the phosphor inside the glass tube for lamp manufacturing, the process of curing the coated phosphor, the process of evacuating the inside of the glass tube, the inside of the glass tube And a step of injecting a predetermined amount of argon gas and mercury, and cutting an end portion of the glass tube to have a lamp shape. However, the detailed process of performing the entire process may vary depending on the electrodes formed on the cold cathode fluorescent lamp and the external electrode fluorescent lamp, but in the sealing cutting process of cutting the end of the glass tube, a cutter for making each fluorescent lamp is used. Only the sealing cutting method is different, the operation process is very similar.

6 is a cross-sectional view illustrating a sealing cutting process of a typical cold cathode fluorescent lamp and FIG. 7 is a typical external electrode fluorescent lamp. The cold cathode fluorescent lamp 19 receives the semi-assembled glass tube 10 before the sealing cutting process and performs sealing cutting, and the bead 12 having the electrode 15 formed on one end of the glass tube is sealed. It is a state. A portion of the shielded electrode 15 is cut (a), and the shape of the cold cathode fluorescent lamp 19 is obtained. On the other hand, the external electrode fluorescent lamp 29 also performs the cutting (b) in a state in which the bead 12 having the electrode 15 formed on one end of the glass tube 10 is temporarily sealed. However, the electrode 15 in the external electrode fluorescent lamp 29 is provided for introducing the beads 12, and after the cutting (b) is completed to form the external electrodes 27 at both ends of the glass tube 10 The process proceeds.

Here, in general manufacturing apparatuses of cold cathode fluorescent lamps, a phosphor coating device for largely applying a phosphor to a glass tube, a cleaning device for washing one end of the glass tube coated with a phosphor, and a phosphor applied to the inside of a glass tube Baking apparatus for removing contained organic matter, electrode sealing apparatus for forming getter room for inserting getters while forming electrodes at both ends of glass tube, and vacuum exhaust and gas cleaning in the interior of glass tube with electrodes formed at both ends of impurity gas An exhaust injection device which seals the getter room by removing discharge gas and mercury and sealing the getter room, a sealing cutting device that seals the electrode sealed at one end of the glass tube and cuts the getter room to form a lamp, and at a high frequency. And a heating device for diffusing mercury injected into the getter into the lamp as a whole. An aging device that stabilizes the lighting state by applying a voltage to the aging inverter.

Conventional sealing cutting device is used to cut the getter room by sealing the electrode sealed in one end of the glass tube, and a variety of methods are used, using a sharp blade after heating the electrode portion sealed in one end of the glass tube to a high temperature By pressure cutting. Accordingly, there is a problem that the electrode is scratched while the glass tube is melted due to the high temperature in the sealing cutting process or the electrode is inclined while the electrode is scratched or the crack is generated in the glass tube.

In addition, when sealing cut the sealed electrode portion of the glass tube to be cut at the exact position desired by the user to reduce the failure rate, it is possible to achieve the automation of the sealing cutting device in the prior art there is no specific alternative to this situation to be.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a sealing cutting device of a glass tube for a backlight unit that can be stably sealed in a state in which the glass tube formed with the sealed electrode is rotated.

In addition, by accurately grasping the sealed electrode portion of the glass tube to correct its position, it significantly reduces the failure rate of the fluorescent lamp, and aims to automate the sealing cutting device.

In addition, an object of the present invention is to provide a sealing cutting device that can be easily replaced by having both a cold cathode fluorescent lamp and a cutter for an external electrode fluorescent lamp, and compatible with both.

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, a sealing cutting device for a glass tube for a backlight unit of the present invention includes a frame to which a glass tube with a shielded electrode formed at one end thereof is supplied, and the glass tube supplied at a constant pitch on the frame. A torch that is provided to each other so as to face each other at both sides of the frame and the conveying unit, the roller unit supporting and rotating both ends of the glass tube, and a torch installed at one side of the frame to heat the sealed electrode portion of the glass tube; A cutting part installed at one side of the frame to cut the temporarily sealed electrode portion of the glass tube, and installed at both sides of the frame to face each other, and after elevating both ends of the glass tube, the transfer unit is configured to move the glass tube. The glass tube is transferred to the roller part from the conveying part by a constant pitch for conveying. The said glass tube at the time of cutting comprises the elevating block to repeat the operation for mounting the conveying part from the roller unit.

The apparatus may further include a gripper which picks up one end portion of the glass tube cut by the cutting unit and is discharged to the outside.

In addition, a camera for photographing the temporarily sealed electrode portion of the glass tube installed and transported above the roller portion, and processing the image signal photographed from the camera, by measuring the degree of alignment of the shielded electrode portion of the glass tube A control unit for determining whether or not within a range of a preset alignment value, and a push rod connected to the control unit for pushing the other end of the glass tube to align the sealed electrode portion of the glass tube within a range of a preset alignment value It is done by

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 rollers, a plurality of rotating rollers are arranged so that each adjacent to cross the zigzag adjacent to form a support bone to support the glass tube, the plurality of support rollers are formed side by side along the transport direction of the glass tube and And, characterized in that it comprises a second drive motor for rotating the plurality of rotary rollers.

In addition, the torch is characterized in that it is installed between the plurality of rotary rollers to heat the sealed electrode portion of the glass tube supported and rotated by the plurality of rotary rollers.

The cutting unit may further include a subframe provided at one side of the frame, a subblock provided to move up and down on the subframe, and a cutter installed at the subblock to cut the sealed electrode portion of the glass tube. It is characterized by including.

The cutter may be any one of a cold cathode fluorescent lamp cutter and an external electrode fluorescent lamp cutter.

In addition, the cutter is provided with both the cold cathode fluorescent lamp cutter and the external electrode fluorescent lamp cutter is characterized in that it is selectively operated by the user's operation.

The sealing cutting device of the glass tube for a backlight unit according to the present invention can stably seal the cut in a state in which the glass tube formed with the electrode sealed by the roller portion rotates, and the glass tube can be accurately and easily moved through the transfer unit and the lifting block. Can be moved to realize the automation of the sealing cutting device.

In addition, through the camera and the push rod connected to the control unit can accurately correct the position to be sealing cut can significantly reduce the failure rate.

In addition, both a cold cathode fluorescent lamp or an external electrode fluorescent lamp cutter may be provided and easily replaced, and both may be compatible.

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

1 is a front view showing a preferred embodiment of the sealing cutting device of the glass tube for a backlight unit of the present invention, Figure 2 is an enlarged view of the main portion of the embodiment of Figure 1, Figure 3 is a plan view of the embodiment of Figure 2, Figure 4 1 is a front view illustrating an operation process of a sealing cutting device of a glass tube for a backlight unit according to the embodiment of FIG. 1, and FIG. 5 is a perspective view illustrating an arrangement relationship between a roller unit, a lifting block, a transfer unit, and a gripper of the embodiment of FIG. 1. .

The sealing cutting device of the glass tube for the backlight unit of the present invention includes a frame 100, a transfer part 200, a roller part 300, a torch 400, a cutting part 500 and a lifting block 600, and The chain support 150 may further include a gripper 700, a camera 800, a controller 820, and a push rod 840. The transfer part 200 may include a chain 220, a sprocket 240, a first driving motor 260, and a glass tube holder 280, and the roller part 300 may include a rotating roller 320 and a second roller. The driving motor 340 may be included, and the cutting unit 500 may include a subframe 520, a subblock 540, and a cutter 560.

The frame 100 receives the glass tube 10 having the temporarily sealed electrode 15 formed at one end thereof and is formed along the 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 to and aligned with the frame 100, one end of the glass tube 10 having the sealed electrode 15 formed thereon faces the same direction on the frame 100. By the cutting unit 500 to be described later to be able to automatically seal the cut portion of the sealed electrode 15 of the glass tube 10.

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 it may include a first drive 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 to move the glass tube holder 285 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.

As described above, a driving means is required to drive the chain 220 circulating in an infinitely orbital manner. 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.

The roller unit 300 is installed on both sides of the frame 100 so as to face each other, and supports and rotates both ends of the glass tube 10. The roller unit 300 is provided on both sides of the frame 100, respectively, a plurality of rotating rollers 320 for supporting and rotating both ends of the glass tube 10, and a second for rotating the plurality of rotating rollers It may include a drive motor 340. The roller unit 300 is located at the portion where the sealing tube is to be performed on the frame 100 to which the glass tube 10 is transferred, and the cutter 560 of the cutting unit 500 to be described later is located above the roller unit 300. It is located at.

In order to support the glass tube 10, a plurality of rotating rollers 320 are installed so as to cross each other in a zigzag adjacent to each other, as shown in Figure 5, that is, the two rotating rollers 320 to support the glass tube 10 In order to form the support bone 325 for the center of the roller surface does not coincide with each other, and in this way the support bone 325 a plurality of rotating rollers to be formed side by side along the conveying direction of the glass tube 10 ( 320). The glass tube 10 is transported and supported on the support bone 325 formed by the plurality of rotating rollers 320, and the glass tube 10 also rotates with the rotation of the plurality of rotating rollers 320. Arrangement interval of the support bone 325 formed by the plurality of rotating rollers 320 is a glass tube provided in the transport interval, that is, the chain 220 of the glass tube 10 is transferred to a constant pitch by the conveying unit 200 At the same interval as the holder 280. Each of the plurality of rotating rollers 320 rotates in the same direction as other adjacent rotating rollers 320, and the glass tube 10 supported by the rotating rollers 320 rotates in the opposite direction to the rotating rollers 320.

In order to rotate the rotary roller 320, a second drive motor 340 is required, and the second drive motor 340 may directly drive the rotary roller 320, but is provided with a power transmission means, The rotary roller 320 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 340, and the like installed on the drive shafts of the plurality of rotating rollers. Accordingly, the roller drive chain is circulated by the rotation of the second drive motor 340, the roller sprocket is rotated by the circulation of the drive chain, and the rotating roller 320 which is coaxial with the roller sprocket is rotated. As a result, the glass tube 10 supported by the rotary roller 320 is rotated, and the position to be sealed cut of the glass tube 10 by the torch 400 to be described later may be uniformly heated by the rotation of the glass tube 10. The sealing cut of the glass tube 10 may be performed more easily by the cutting part 500. That is, when the glass tube 10 is soluble by the torch 400, the electrode 15 may be distorted due to the rotation of the glass tube 10, or the defect such as the glass tube 10 may be biased downward may be significantly reduced. will be.

On the other hand, the roller unit 300 is installed in a position where the glass tube 10 is supported higher than the transfer unit 200 so that the glass tube 10 rotated by the roller unit 300 is separated from the transfer unit 200 upwards. do. That is, when the glass tube 10 is supported by the valley formed by the rotary roller 320 of the roller unit 300, the glass tube 10 is more than when the glass tube 10 is supported by the glass tube holder 280 of the transfer unit 200. The supported position is increased so as to space the glass tube 10 upward from the glass tube holder 280. Accordingly, the glass tube 10 may be freely rotated by the roller unit 300 without interfering with the transfer unit 200 during rotation.

In this case, the glass tube 10 transferred to the conveying part 200 is seated on the roller part 300 or the glass tube 10 sealed by the cutting part 500 to be described later in the roller part 300 is transferred again. As shown in FIG. 4, the elevating block 600 is required to be seated at 200.

The lifting block 600 is installed adjacent to the roller unit 300 so as to face each other at both sides of the frame 100. In addition, after elevating both ends of the glass tube 10, the transfer unit 200 transfers the glass tube 10 by a predetermined pitch to transfer the glass tube 10 to the roller unit 300 from the transfer unit 200. At the same time as seated on the glass tube 10 is cut and repeats the operation of seating the transport unit 200 from the roller portion 300. That is, since the support position of the glass tube 10 of the roller unit 300 is higher than the support position of the glass tube 10 of the transfer unit 200, the glass tube 10 may not be directly seated from the transfer unit 200 to the roller unit 300. Therefore, the lifting block 600 serves as a medium capable of transferring the glass tube 10 from the transfer unit 200 to the roller unit 300 and the roller unit 300 to the transfer unit 200. In this case, when the lifting block 600 to raise and lower the glass tube 10, the holding groove 285 formed in the glass tube holder 280 of the transfer unit 200 so that the glass tube 10 is stably supported and The same glass tube support groove is preferably formed in the elevating block 600.

On the other hand, if the lifting block 600 is not provided separately, the roller unit 300 is directly raised and lowered to receive and rotate the glass tube 10 from the transfer unit 200, the cutting operation by the cutting unit 500 to be described later When the sealing cutting position of the glass tube 10 is variable, precise cutting is difficult, and a more complicated correction device must be separately provided to correct the sealing cutting position. That is, since the roller unit 300 is continuously rotating, the position of the glass tube 10 supported by the roller unit 300 such as friction vibration caused by the rising and falling of the roller unit 300 together with the position correction due to the rotational vibration is Because it can change from time to time. Therefore, by transferring the glass tube 10 to the transfer part 200 and the roller part 300 by the lifting block 600, respectively, only the support position of the glass tube 10 of the roller part 300 is correctly fixed, and the glass tube 10 By precisely positioning only the electrode part, it is possible to perform precise sealing cutting simply.

When the glass tube 10 is seated from the transfer unit 200 to the roller unit 300 by the lifting block 600, a more accurate sealing cutting is performed before the sealing cutting operation is performed by the cutting unit 500 to be described later. It is necessary to correct the position of the portion of the shielded electrode 15 of the glass tube 10 to be within the set range, that is, the position to be cut by the cutting unit 500. To this end, as shown in FIGS. 1 to 3, a camera 800, a controller 820, and a push rod 840 are required.

The camera 800 photographs the part of the shielded electrode 15 of the glass tube 10 which is installed and transferred above the roller part 600. The controller 820 processes the image signal photographed from the camera 800, and measures the degree of alignment of the portion of the shielded electrode 15 of the glass tube 10 to determine whether it is within a preset range of alignment values. . Here, the range of the preset alignment value of the glass tube 10 in order to prevent the occurrence of a failure by sealing the electrode 15 of the glass tube 10 accurately by the cutter 560 of the cutting unit 500 to be described later. The part of the electrode 15 is the minimum error range of the position where the sealing is to be cut. The push rod 840 is connected to the controller 820 to push the other end of the glass tube 10 to align the portion of the shielded electrode 15 of the glass tube 10 within a range of a preset alignment value. That is, even if the glass tube 10 is provided to the first frame 100, such as when the glass tube 10 is transported by the transfer unit 200 or seated on the roller unit 300 by the lifting block 600, the cutting unit 500 The position to be sealed of the glass tube 10 may change until the sealing is cut. Accordingly, it is necessary to correct the portion of the shielded electrode 15 of the glass tube 10, that is, the position to be sealed cut. For this purpose, the push rod 840 pushes the other end of the glass tube 10 by a variable position. It is to correct the position to be the sealing cut of the glass tube 10 within the range of the preset alignment value.

The torch 400 is installed at one side of the frame 100 to heat the portion of the shielded electrode 15 of the glass tube 10. The torch 400 heats the part of the glassed electrode 15 of the glass tube 10, so that the glass tube 10 is melted, and the glass tube 10 is more easily sealed cut by the cutting part 500 to be described later. To be possible. The torch 400 should be installed to heat the portion of the sealed electrode 15 of the glass tube 10, that is, the position to be sealed, immediately before the glass tube 10 is sealed by the cutting unit 500, which will be described later. Therefore, the roller parts 300 are installed adjacent to one roller part 300 installed at one side of the frame 100 together with the cutting part 500 to be described later among both side parts of the frame 100 in which the roller parts 300 are located. Preferably, as shown in FIG. 5, the torch 400 is supported by the plurality of rotating rollers 320 constituting the roller part 300, and the sealed electrode 15 of the glass tube 10 that rotates. Since the part is installed between the plurality of rotating rollers 320 to heat, the sealing can be cut immediately after heating together with the rotation of the glass tube 10, thereby simplifying the process and compacting the device.

The cutting unit 500 is installed at one side of the frame 100 to seal the portion of the shielded electrode 15 of the glass tube 10 to the subframe 520, the subblock 540, and the cutter 560. It is provided. The subframe 520 is fixed to one side of the frame 100, and is installed adjacent to the roller 300 and the torch 500. The other components of the cutting unit 500 are fastened to the subframe 520.

The subblock 540 is provided to be able to move up and down in the subframe 520. The subblock 540 may be provided to slide along one surface of the subframe 520. For example, the subblock 540 may be provided in the subframe 520, and the subblock 540 may be provided with a guide shoe. In addition, as a driving method for raising and lowering the sub-block 540, a linear actuator is used, and in particular, the construction of an automation line or precise control is easy by using a linear electric motor.

The cutter 560 is installed in the sub block 540 to cut a portion of the shielded electrode 15 of the glass tube 10, that is, a position to be sealed cut. The cutter 560 is connected to a driving means such as an electric motor, and seals the glass tube 10 for the backlight unit by rotation. At this time, the cutter 560 may be raised and lowered by the sub-block 540 in the subframe 520, thus sealing sealing the glass tube 10 rotated by the roller unit 300. The cutter 560 may be any one of a cold cathode fluorescent lamp cutter and an external electrode fluorescent lamp cutter. In addition, the cutter 560 may include both a cold cathode fluorescent lamp cutter and an external electrode fluorescent lamp cutter to be selectively operated by a user's operation. That is, the cutter 560 may be installed to be replaced manually or automatically according to the type of fluorescent lamp. However, since the cold cathode fluorescent lamp cutter or the external electrode fluorescent lamp cutter uses a conventional cutter, a detailed description thereof will be omitted.

The gripper 700 picks up the cut portion of the glass tube 10 cut by the cutting part 500 and discharges it to the outside. That is, when the glass tube 10 rotating by the roller unit 300 is heated by the torch 400 and is cut by the cutting unit 500, the sealing cut and remaining cut portion of the glass tube 10 is gripper ( 700 is picked up and discharged to the outside. The gripper 700 serves as a simple robot arm in a general forceps shape.

Hereinafter, the operation of a preferred embodiment of the sealing cutting device of the glass tube for a backlight unit according to the present invention will be described with reference to Figures 4a to 4e.

A glass tube 10 for a backlight unit having an electrode 15 sealed at one end through a phosphor coating device, a cleaning device, a baking device, an electrode sealing device, and an exhaust injection device is provided to the frame 100 to be aligned. At this time, the glass tube 10 is supported by the transfer unit 200 installed in the frame 100 is transferred from one end to the other end of the frame 100 by a predetermined interval. 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 transported 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 transported in contact. As shown in FIG. 4A, the glass tube 10 being transferred by the transfer part 200 enters an area in which the lifting block 600, the roller part 300, the torch 400, and the cutting part 500 are provided. . Operation of the camera 800, the control unit 820 and the push rod 840 immediately before or immediately after entering the area corrects the position of the portion of the shielded electrode 15 of the glass tube 10 to the correct position to be sealed cut. Can be.

As shown in FIG. 4B, the elevating block 600 elevates the glass tube 10 from the glass tube holder 280 of the transfer unit 200.

As shown in FIG. 4C, after the glass tube 10 is elevated by the elevating block 600, the elevating block 600 is supported by the glass tube 10 to move up and down by the transfer interval in the conveying direction of the transfer unit 200. It moves horizontally, and simultaneously the conveyance part 200 also moves along the frame 100 by the same space | interval.

As shown in FIG. 4D, the transfer unit 200 stops moving, and the lifting block 600 lowers the glass tube 10 to seat the roller unit 300.

As shown in FIG. 4E, the glass tube 10 seated on the roller part 300 is supported and rotated by a plurality of rotating rollers 320 that are rotated by the second driving motor 340. 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. In the state where the glass tube 10 is being rotated by the rotating roller 320, the cutter 560 of the cutting part 500 is lowered to seal the cut portion of the glass tube 10, that is, the portion of the sealed electrode 15. Seal cutting. However, before the glass tube 10 is silica-cut by the cutting unit 500, the glass tube 10 may be soluble first with a high-temperature flame emitted from the torch 400 illustrated in FIG. 5.

When the sealing cut of the glass tube 10 is completed, the shape of the fluorescent lamp is completed, and the fluorescent lamp is continuously transferred to the left side by the lifting block 600 based on FIG. After the sealing cut is completed, the glass tubes 10 seated on the transfer part 200 are continuously transferred toward the heating device and the aging device for mercury diffusion.

By repeating the above process is to perform the sealing cutting operation of the glass tube 10, it is possible to build the automation line.

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 long as it will be apparent to those skilled in the art.

1 is a front view showing a preferred embodiment of a sealing cutting device of a glass tube for a backlight unit of the present invention,

2 is an enlarged view illustrating main parts of the embodiment of FIG. 1;

3 is a plan view of the embodiment of FIG.

Figure 4 is a front view showing the operation of the sealing cutting device of the glass tube for the backlight unit according to the embodiment of Figure 1,

FIG. 5 is a perspective view illustrating an arrangement relationship between a roller unit, a lifting block, a transfer unit, and a gripper of the embodiment of FIG. 1;

6 is a cross-sectional view showing a sealing cutting process of a typical cold cathode fluorescent lamp,

7 is a cross-sectional view illustrating a sealing cutting process of a general external electrode fluorescent lamp.

Description of the main symbols in the drawings

10 glass tube 15 shielded electrode

100: frame 150: chain support

200: transfer unit 220: chain

240: sprocket 260: first drive motor

280: glass tube holder 285: gripping groove

300: roller portion 320: rotary roller

325: support bone 340: second drive motor

400: torch

500: cutting unit 520: subframe

540: subblock 560: cutter

600: lifting block

700: gripper

800: camera 820: control unit

840: push rod

Claims (10)

A frame to which a glass tube having a shielded electrode formed at one end is supplied; A transfer part for transferring the supplied glass tube to the frame at a constant pitch; Roller parts which are respectively installed to face each other at both sides of the frame to support and rotate both ends of the glass tube; A torch installed at one side of the frame to heat the sealed electrode portion of the glass tube; A cutting part installed at one side of the frame to cut the sealed electrode part of the glass tube; It is installed on both sides of the frame to face each other, and after lifting both ends of the glass tube is transported to the glass tube by a constant pitch for transporting the glass tube to be seated and cut at the same time while seated on the roller portion Sealing and cutting device for a glass tube for a backlight unit comprising a lifting block for repeating the operation of seating the glass tube from the roller to the transfer unit. The method of claim 1, And a gripper for picking up one end portion of the glass tube cut by the cutting unit and below the sealed electrode portion and discharging it to the outside. The method of claim 1, A camera for photographing the sealed electrode portion of the glass tube which is installed and transported above the roller part; A controller configured to process an image signal photographed from the camera and measure an alignment degree of the shielded electrode portion of the glass tube to determine whether it is within a preset alignment value; And a push rod connected to the controller to push the other end of the glass tube to align the sealed electrode portion of the glass tube within a range of a preset alignment value. 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, A gripping 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 to support the lower portions of the pair of chains, respectively. The method of claim 1, The roller unit, A plurality of rotating rollers disposed to cross each other in a zigzag adjacent to each other to form a support bone capable of supporting the glass tube, wherein the support bones are formed in parallel along the conveying direction of the glass tube; And a second driving motor for rotating the plurality of rotation rollers. The method of claim 6, And the torch is installed between the plurality of rotating rollers so as to heat the sealed electrode portion of the glass tube supported and rotated by the plurality of rotating rollers. The method of claim 1, The cutting unit, A subframe installed at one side of the frame, A sub block provided to be able to move up and down in the subframe; And a cutter installed on the sub-block to cut the sealed electrode portion of the glass tube. The method of claim 8, And the cutter is any one of a cold cathode fluorescent lamp cutter and an external electrode fluorescent lamp cutter. The method of claim 8, The cutter is provided with both a cold cathode fluorescent lamp cutter and an external electrode fluorescent lamp cutter is selectively operating by the user's operation sealing sealing device for the glass tube.

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