KR100713804B1 - Seal-cutting apparatus - Google Patents

Abstract

A thread cutting device is provided. The seal cutting device according to the present invention includes a main head chuck and a sub head chuck for fixing a glass tube, and a seal cutting device for thread cutting one end of the glass tube, the first auxiliary pulley and the second end of each of the first and second pulleys. A driving force transmission unit having a second auxiliary pulley, the first auxiliary pulley being connected to a belt and a main pulley installed at an end of a driving shaft of a motor providing a driving force to the glass tube seal cutting device, and transmitting a driving force of the motor; A main head pulley installed to contact a belt spanning the first auxiliary pulley to rotate a main head gear connected to the main head chuck; A subhead pulley installed to contact a belt spanning the second auxiliary pulley to rotate a subhead gear connected to the subhead chuck; And a torch for heating one end of the glass tube. According to the present invention, by cutting the one end of the glass tube while rotating the main head chuck and the sub head chuck fixing the glass tube at the same speed, it is possible to prevent the glass tube from twisting.

Sealing device, main head chuck, sub head chuck, fluorescent lamp, pulley

Description

Seal-cutting apparatus

1 is a cross-sectional view of a seal cutting device of a fluorescent lamp according to an embodiment of the present invention.

Figure 2 is a side view of the seal cutting device of the fluorescent lamp according to an embodiment of the present invention.

3 is a view showing in detail the configuration of the portion including the sub-head connecting portion of FIG.

* Explanation of symbols for main parts of drawings *

110: motor 120: main pulley

125: driving force transmission unit 130: first auxiliary pulley

135: second auxiliary pulley 140: main head pulley

145: auxiliary head pulley 150: main head gear

155: auxiliary head gear 160: main head chuck

165: auxiliary head chuck 170: moving part

180: belt 190: other auxiliary pulley

200: fluorescent lamp fixing part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread cutting device. More particularly, the present invention relates to a thread cutting device including a main head chuck and a sub head chuck for fixing a glass tube to seal the one end of the fluorescent lamp.

In general, a flat panel display is classified into a light emitting type and a light receiving type. The light emitting type includes a cathode ray tube, an electroluminescent (EL) element, a plasma display panel (PDP), and the like. The light receiving type includes a liquid crystal display (LCD) and the like.

Since the light receiving display device itself emits light and does not form an image, but receives light from the outside to form an image, a separate light source, for example, a backlight, must be provided.

Fluorescent lamps used in the backlight include cold cathode fluorescent lamps (CCFLs) in which both electrodes are installed in the tube, and external electrode fluorescent lamps (EEFL) in which both electrodes are installed outside the tube.

Cold cathode fluorescent lamps are coated with a protective film and phosphor on the inner surface of the glass tube, baked at high temperature, and equipped with electrodes at both ends of the glass tube to be sealed through a vacuum exhaust process, and a certain amount of mercury, argon (Ar) and When a high voltage is applied to the electrodes provided at both ends by filling a mixed gas such as neon, mercury is excited by the electron emission by the electric field from the electrode, and the ultraviolet rays are emitted, and the ultraviolet rays are emitted as visible light by the phosphor. It is called a cold cathode fluorescent lamp because it is converted and irradiated with light, and electrons are not emitted by heat, but heat is not required by an electron emission method by an electric field.

In general, a method of manufacturing a cold-fluorescent fluorescent lamp includes applying a phosphor to an inner surface of a glass tube having both ends open, a baking step of removing deposits and organic matter of the applied phosphor, and sealing an electrode at one end of the glass tube, and getting getter room Forming an electrode, sealing the electrode at the other end of the glass tube, evacuating the glass tube, injecting a discharge gas, sealing and forming one end of the glass tube, and aging.

The seal cutting device for seal-cutting one end of a glass tube is equipped with one torch which can be rotated along the outer peripheral direction of a glass tube. This seal cutting device fixes the glass tube and seal-cuts one end of the glass tube while rotating the torch along the outer periphery of the temporarily fixed position at one end of the glass tube.

However, this manner of fixing the glass tube and thread cutting while rotating the torch significantly complicates the thread cutting device. Therefore, the apparatus for fixing the torch and thread cutting while rotating the glass tube has been researched and developed. However, as the rotational speeds of the pair of head chucks, that is, the main head chuck and the sub head chuck, which rotate by fixing the glass tube are different, There is a problem in that the fluorescent lamp is broken even in a small impact due to the twisting phenomenon occurs.

SUMMARY OF THE INVENTION The present invention provides a fluorescent lamp seal cutting device including a main head chuck and a sub head chuck to fix a fluorescent lamp to seal the one end of the fluorescent lamp while rotating the main head chuck and the sub head chuck at the same speed. To provide.

According to another aspect of the present invention, a seal cutting device includes a main head chuck and a sub head chuck to fix a glass pipe, and a seal cutting device to seal the one end of the glass pipe. And a first auxiliary pulley and a second auxiliary pulley, wherein the first auxiliary pulley is connected to a belt and a main pulley installed at an end of a drive shaft of a motor providing a driving force to the fluorescent lamp seal cutting device. Driving force transmission unit for transmitting; A main head pulley installed to contact a belt spanning the first auxiliary pulley to rotate a main head gear connected to the main head chuck; A subhead pulley installed to contact a belt spanning the second auxiliary pulley to rotate a subhead gear connected to the subhead chuck; When the torch for heating one end of the fluorescent lamp and the sub head chuck does not rotate in the same way as the main head chuck, it is installed between the sub head rotating part connected to the sub head chuck and the sub head shaft connected to the sub head gear. And a subhead connecting portion for rotating the subhead chuck in the same manner as the main head chuck.

The seal cutting device according to the present invention may further include a moving unit for moving the sub head chuck in the tube axis direction of the fluorescent lamp with respect to the main head chuck.

The sub head connection unit includes a rotation correction unit that rotates the sub head rotating unit in the same manner as the main head chuck; An elastic part configured to apply a force to a portion where the sub head connecting portion and the sub head shaft meet to fix the sub head shaft to the sub head connecting portion; And it may include a tension control nut for adjusting the tension of the elastic portion.

delete

Preferably, the rotation correction unit is a bearing. Alternatively, the rotation compensator may be a bush.

delete

delete

According to another aspect of the present invention to achieve the above technical problem, a thread cutting device includes: a main head chuck and a sub head chuck fixing both ends of a glass tube; A torch for heating one end of the glass tube; A driving force transmission unit for transmitting a driving force applied to any one of the main head chuck and the sub head chuck to the other such that the rotation speed of the main head chuck and the sub head chuck are the same; And a subhead connecting portion for smoothly rotating the subhead chuck so as to rotate in the same manner as the main head chuck when slip occurs between the main head chuck and the sub head chuck.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. For each figure, like reference numerals denote like elements.

In the embodiment of the present invention, a seal cutting device of a fluorescent lamp used in a process of manufacturing a fluorescent lamp by sealing a glass tube will be described as an example.

1 is a cross-sectional view of a seal cutting device of a fluorescent lamp according to an embodiment of the present invention, Figure 2 shows a side view of a seal cutting device of a fluorescent lamp according to an embodiment of the present invention.

1 and 2, the thread cutting device 100 of the fluorescent lamp includes a driving force transmitting unit 125, a first auxiliary pulley 130, a second auxiliary pulley 135, a main head pulley 140, and a sub head. Pulley 145, main head gear 150, sub head gear 155, main head chuck 160, sub head chuck 165, sub head rotator 167, sub head connection 169, moving part ( 170, sub head shaft 172 and torch 175.

The main pulley 120 is installed at the end of the drive shaft of the motor 110.

The driving force transmission unit 125 is for transmitting the driving force of the motor 110 to the thread cutting device 100, and includes first and second auxiliary pulleys 130 and 135 at both ends.

The first auxiliary pulley 130 is connected to the main pulley 120 and the belt 180. Belt 180 is a timing belt. When the main pulley 120 rotates according to the driving of the motor 110, the belt 180 rotates and the first auxiliary pulley 130 and the second auxiliary pulley 135 rotate due to the rotation of the belt 180. Rotate

The main head pulley 140 is installed to contact the belt 180 spanning the first auxiliary pulley 130 to rotate the main head gear 150 connected to the main head chuck 160. The sub head pulley 145 is installed to contact a belt (not shown) spanning the second auxiliary pulley 135 to rotate the sub head gear 155 connected to the sub head chuck 165. Since the main head pulley 140 and the sub head pulley 145 rotate by engaging with the first auxiliary pulley 130 and the second auxiliary pulley 135, the main head chuck 160 and the sub head are rotated at the same speed. The chuck 165 rotates at the same speed.

As shown in FIG. 2, another auxiliary pulley 190 may be installed between the main pulley 120 and the first auxiliary pulley 130 to maintain a constant tension of the belt 180. This is because the rotation speed of the main head pulley 140 which is engaged with the belt 180 to rotate is maintained only when the tension of the belt 180 is kept constant.

The fluorescent lamp is fixed by the main head chuck 160 and the sub head chuck 165 through a hole in the center of the main head chuck 160. As the motor 110 is driven, the first auxiliary pulley 130 connected to the belt 180 is rotated, and the second auxiliary pulley 135 is rotated at the same speed, and the main head chuck 160 and the sub head chuck 165 are rotated. ) Is rotated at the same speed.

As the main head chuck 160 and the sub head chuck 165 rotate, the fluorescent lamp is rotated, and one end of the fluorescent lamp is heated by the torch 175. The method of thread cutting using the fixed torch 175 while rotating the fluorescent lamp makes the thread cutting device less complicated than the method of fixing the fluorescent lamp and thread cutting while rotating the torch. In addition, when the torch is rotated, the shape of the flame may not be constantly heated along the circumference of the fluorescent lamp while the flame shape is deformed by air resistance, while the torch may be fixed.

When the main head chuck 160 and the sub head chuck 165 rotate, the rotation speed may vary due to either slip. At this time, when the sub head chuck 165 does not rotate in the same manner as the main head chuck 160, the sub head connecting part 169 may include the sub head rotating part 167 and the sub head gear (connected to the sub head chuck 165). It is installed between the sub head shaft 172 connected to the 145, and serves to rotate the sub head chuck 165 in the same way as the main head chuck 160. The detailed configuration of the sub head connection unit 169 will be described later with reference to FIG. 3.

When one end of the fluorescent lamp is sufficiently heated to be cut to some extent, the subhead chuck 165 is moved by the moving unit 170 in the tube axis direction of the fluorescent lamp with respect to the main head chuck 160.

That is, the sub head chuck 165 is moved away from the main head chuck 160. In this manner, one end of the fluorescent lamp is pulled and stretched as it is stretched. As a result, the thread-cutting portion of the fluorescent lamp is not flat, and the shape of the thread-cutting portion is good.

3 is a view illustrating in detail the configuration of a part including the subhead connection part of FIG. 1.

The sub head connection unit 169 includes a rotation correcting unit 310, an elastic unit 330, a tension adjusting nut 340, and a fixing nut 350.

When the sub head chuck 165 does not rotate in the same manner as the main head chuck 160, the rotation compensator 310 connects the sub head rotator 167 connected to the sub head chuck 165 with the main head chuck 160. It serves to rotate the same. In the embodiment of the present invention, a bearing is used for the rotation correction unit 310.

When slip occurs between the subhead chuck 165 and the main head chuck 160, the rotation correction unit 310 smoothly rotates the subhead chuck 165 to rotate in the same manner as the main head chuck 160. It plays a role.

Alternatively, a bush may be used for the rotation correction unit 310.

The elastic portion 330 may apply a force to the friction portion 320, which is a portion where the subhead connecting portion 169 and the subhead shaft 172 meet so as to fix the subhead shaft 172 to the subhead connecting portion 169. Add.

The tension adjusting nut 340 adjusts the tension of the elastic portion 330. If the tension is applied to the elastic portion 330 too strongly, the friction portion 320 is generated a lot of friction force between the sub-head chuck 165 and the main head chuck 160 because the rotation of the sub-head connection portion 320 is not smooth. Even if slip occurs, rotation cannot be compensated.

On the contrary, when the tension is applied to the elastic portion 330 too weakly, the frictional force of the friction portion 320 is too small to properly transmit the rotational force of the subhead shaft 172 to the subhead connection portion 169.

The fixing nut 350 fixes the sub head shaft 172 to the sub head connecting portion 169.

Even if a slip occurs in the main head chuck 160 and the sub head chuck 165 which can be rotated at the same speed by the drive transmission unit 125 by the subhead connection unit 169 having such a structure, the same is corrected. Secure the rotation at speed.

Although partially shown in FIG. 2, the plurality of fluorescent lamp fixing parts 200 are arranged in a circular shape, and thus, the fluorescent lamp fixing parts 200 rotate to manufacture the fluorescent lamps according to the manufacturing process of the fluorescent lamps.

In addition, the present invention can be applied not only to a cold cathode fluorescent lamp manufacturing apparatus but also to a general fluorescent lamp manufacturing apparatus such as an external electrode fluorescent lamp (EEFL).

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

According to the present invention, by cutting the one end of the glass tube while rotating the main head chuck and the sub head chuck fixing the glass tube at the same speed, it is possible to prevent the glass tube from twisting. In addition, when the rotation is not the same due to the slip between the main head chuck and the sub head chuck, the sub head chuck is rotated in the same way as the main head chuck due to the action of the sub head connection provided between the sub head chuck and the sub head shaft connected to the sub head gear. You can.

Claims (10)

Claims [1] A seal cutting device comprising a main head chuck and a sub head chuck for fixing a glass tube to seal-cut one end of the glass tube. A first auxiliary pulley and a second auxiliary pulley are provided at both ends, and the first auxiliary pulley is connected to a belt by a main pulley (pulley) provided at an end of a drive shaft of a motor providing a driving force to the glass tube seal cutting device, and a driving force of the motor. Driving force transmission unit for transmitting; A main head pulley installed to contact a belt spanning the first auxiliary pulley to rotate a main head gear connected to the main head chuck; A subhead pulley installed to contact a belt spanning the second auxiliary pulley to rotate a subhead gear connected to the subhead chuck; A torch for heating one end of the glass tube; And When the subhead chuck does not rotate in the same manner as the main head chuck, the subhead chuck is installed between the subhead rotating part connected to the subhead chuck and the subhead shaft connected to the subhead gear to make the subhead chuck the same as the main head chuck. Sealing device comprising a sub-head connection to rotate. The method of claim 1, And the belt is a timing belt. The method of claim 1, And a moving unit which moves the sub head chuck in the tube axis direction of the glass tube with respect to the main head chuck. delete The method of claim 1, The sub head connection portion, A rotation correction unit for rotating the sub head rotating unit in the same manner as the main head chuck; An elastic part configured to apply a force to a portion where the sub head connecting portion and the sub head shaft meet to fix the sub head shaft to the sub head connecting portion; Sealing device, characterized in that it comprises a tension adjustment nut for adjusting the tension of the elastic portion. The method of claim 5, Sealing device, characterized in that the rotation correction unit is a bearing. The method of claim 5, And the rotation compensator is a bush. delete delete A main head chuck and a sub head chuck fixing both ends of the glass tube; A torch for heating one end of the glass tube; A driving force transmission unit for transmitting a driving force applied to any one of the main head chuck and the sub head chuck to the other such that the rotation speed of the main head chuck and the sub head chuck are the same; And And a subhead connecting portion for smoothly rotating the subhead chuck so that the subhead chuck can rotate in the same manner as the main head chuck when slip occurs between the main head chuck and the sub head chuck.

Images