JPS6126180B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cathode ray tube and an apparatus therefor, in which a means for removing glass debris fused to a mount chip during sealing of the cathode ray tube is improved.

Generally, in sealing a cathode ray tube, as shown in FIG. 1, the panel 11 and neck portion 12 of the cathode ray tube 10 are held in a predetermined position by a holder, and an electron gun is mounted on a mount chip 13 located below the holder. The electron gun is supported by inserting the stem pin 14, and then the mount chip 13 is raised to insert the electron gun into the neck 12 of the cathode ray tube 10, and in this state the neck 12 is sealed by heat. After this sealing, the mount chip 13 is lowered to the state shown in the figure, but glass debris (hereinafter referred to as cullet) 15 is formed around the mount chip 13 by the sealing process, as shown in the figure. It fuses into a shape. If this cullet 15 is left as it is, it will interfere with the next sealing operation, so it must be removed every time.

Conventionally, the removal of the cullet 15 has been carried out using, for example, a bellows-shaped hose 18 having an iron cylindrical tube 17 at the tip, and evacuating the hose 18 with a vacuum suction device 19, as shown in FIG. was. That is, an operator grasps the knob 21 provided on the outer surface of the iron cylindrical tube 17, places the open end of the iron cylindrical tube 17 over the cullet 15 fused to the mount tip 13, and shakes it back and forth and left and right. The impact destroys Calet 15, and
The broken and fallen cullet 15 was removed by suction through a hose 18 by a vacuum suction device 19.

However, according to the above-mentioned means, the worker has to carry the heavy iron cylindrical tube 17 each time, which puts a heavy burden on the worker. In addition, suction residue is likely to occur, which may impede the operation of the sealing mechanism, and if it gets mixed into the cathode ray tube 10 during the sealing operation, it may adversely affect the quality of the cathode ray tube 10. Furthermore, since the iron cylindrical tube 17 applies a strong impact to the mount tip 13 each time, the mount tip 13 is subject to severe wear and tear, and the rod for raising and lowering the mount tip becomes bent, making it impossible to move up and down smoothly and damaging the seal. There were problems such as a decrease in stopping accuracy.

An object of the present invention is to be able to remove the cullet that is fused around the mount chip during the sealing operation of the cathode ray tube without causing any impact, and to automate the cullet removal process without damaging the mount chip. Another object of the present invention is to provide a method and apparatus for manufacturing a cathode ray tube that achieves good sealing.

The method for manufacturing a cathode ray tube of the present invention is a method for manufacturing a cathode ray tube in which an electron gun supported on a mount chip is inserted into the neck of the cathode ray tube and sealed, and after the sealing, glass scraps are fused from the cathode ray tube. A step of separating the mount chip, a step of heating the glass chips fused to the separated mount chip to separate it from the mount chip, and a step of mounting the separated glass chips without any destructive operation. The present invention is characterized by comprising a step of removing it from the chip portion.

Further, the cathode ray tube manufacturing apparatus of the present invention is a cathode ray tube manufacturing apparatus that inserts and seals an electron gun supported on a mount chip into the neck portion of the cathode ray tube, wherein the cathode ray tube manufacturing apparatus is provided with respect to the mount chip and performs the sealing operation. a heating element that heats the glass debris fused to the mount chip and separates it from the mount chip; and a heating element that engages and moves the glass debris separated by the heating and removes it from the mount chip without any destructive operation. The present invention is characterized in that it is equipped with an ejector for ejecting.

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

As shown in FIG. 1, the cathode ray tube sealing operation itself involves holding the panel 11 and neck portion 12 of the cathode ray tube 10 in a predetermined position with a holder, and attaching an electron gun to the mount chip 13 located below the holder. is supported by inserting the stem pin 14, then the mount chip 13 is raised, the electron gun is inserted into the neck portion 12 of the cathode ray tube 10, and the neck portion 12 is heat-sealed in this state. . After this sealing, mount chip 1
3 is lowered, and the mount chip 13 with the cullet 15 fused around it is separated from the cathode ray tube 10.

FIG. 2 shows the state in which the mount chip 1, to which the cullet 15 is fused, is lowered. In FIG. 2, 25 is a heating element, and the mount chip 13
It is used to uniformly heat the cullet 15 that is fused around the cullet 15. As this heating body 25, for example, a ring-shaped burner is used as shown in the figure. 2
Reference numeral 6 denotes a remover for the cullet 15, which has a groove 28 in the center for avoiding the mount tip lifting rod 27, and is approximately U-shaped in plan, and the burner 25 is opposed to the ring-shaped burner 25. It is also supported by a frame 29.

Reference numeral 31 denotes a movable support body, which is supported by a slide column 32 so as to be movable up and down, and supports the frame 29 via a ball spline shaft 33 so as to be movable back and forth. Both 35 and 36 are actuating cylinders, the former being provided between the movable support 31 and the frame 29 to move the frame 29 forward and backward with respect to the mount chip 13, and the latter being provided between the movable support 31 and the base 37. The movable support body 31 is moved up and down.

Reference numeral 39 denotes a cullet stopper, which is formed into a plate shape and is placed on both sides of the mount tip lifting rod 27 along the direction in which the remover 26 enters. Maintain approach distance. Reference numeral 41 denotes an air blow nozzle, which is attached from outside the apparatus so as to face above the removing tool 26, and is used to drop the cullet 15 after being removed. 42 is a discharge chute for guiding the cullet 15 falling from the ejector 26, and 43 is a cullet receiving box disposed at the terminal end of the discharge chute 42.

In the above configuration, removal of the cullet 15 is performed as follows. First, from the state shown in FIG. 2, the frame 26 is pushed out by the operating cylinder 35, and as shown in FIG. position it like this. The burner 25, which is lit in this state, uniformly heats the cullet 15. Due to this heating, the cullet 15 is softened, and the mount tip 1
It becomes easier to separate from 3 and becomes separated. Next, the movable support 36 is raised by the cylinder 36. With this operation, the removing tool 26 and the ring-shaped burner 25 also rise as shown in FIG. 4, so that the cullet 15 is extracted upward from the mount tip 13 by the removing tool 26.

Next, the removing tool 26 is moved backward by the actuating cylinder 35, and further lowered by the actuating cylinder 36.
With this operation, the removing tool 26 returns to the position shown in FIG. 2, so the cullet 15 on the removing tool 26 is blown against the air blow nozzle 41 and dropped, and removed into the cullet receiving box 43 via the ejection chute 42 for work. end.

Therefore, the cullet 15 fused to the mount chip 13 can be removed without any destructive operation, that is, without receiving any impact, and the operator's manual work can be omitted, reducing the burden on the operator. It is possible to perform a good sealing work by significantly reducing the amount of damage.

Next, another embodiment of the present invention will be described. In the above embodiment, a ring-shaped heating body 25 was used, but
In short, the problem is how uniformly the fused portion between the cullet 15 and the mount tip 13 can be heated, and the following methods are also used for this purpose.
That is, as shown in FIG.
5. As shown in FIG. 6, a plurality of burners 4 are arranged approximately symmetrically around the fused portion of the cullet 15.
6. As shown in FIG. 7, various devices are used, such as a high frequency coil 47 loosely fitted around the outer periphery of the fused portion of the cullet 15 and arranged around the cullet 15, and a laser beam (not shown).

Further, the removing tool 26 is not limited to that of the above embodiment, but may be a round bar formed into a U shape as shown in FIG. A pair of openable and closable plates 26a and 26b having through-holes on opposing surfaces connected by a spring 26c may be used.

In addition, the shape of the mount tip 13 was formed into a downwardly tapered shape in the above embodiment, as shown in FIG. 4, so that the cullet 15 could easily fall. Since the fused portion 15 may get stuck or become difficult to remove when removed by the removal tool 26, the shape of the mount tip 13 may be configured as shown in FIG. 10, for example. That is, the upper part of the mount chip 13 to which the cullet 15 is fused is formed into a cylindrical shape with the same outer diameter, and the part below it is tapered downward as in the previous embodiment.

When formed in this manner, the cullet 15 does not sink inward from the upper end of the tapered part of the mount tip 13 and fuse as in the case of the shape shown in FIG. be able to. Therefore, when the mount chip 13 is removed, it does not receive any upward force.
The height accuracy of the mount chip 13 can be kept high, the sealing work can be performed better, and a high quality cathode ray tube can be obtained.

The mount tip 13 is designed to prevent the cullet 15 from sinking inward from the tapered upper end of the mount tip and being fused, but for this purpose, the shape is not limited to the above, and for example, the shape shown in FIGS.
It may also be of the shape shown in FIGS. In other words, Figures 11a and 11e are cylindrical, Figures 11b and 11 are tapered upwards, and Figures 11d and 11 are cylindrical. Its side surface is formed into a curved shape that swells outward. Also, the first
Figure 2 shows the end face shape of the mount chip 13.
Broadly speaking, there are two types: those with flat parts on the side faces (a and b in the figure) and those with protrusions and recesses on the side faces (c to g in the figure) and gear-shaped end faces.

These shapes do not prevent the cullet 15 from falling, and moreover, it can be easily extracted after softening.

As described above, according to the present invention, when removing glass debris (cullet) that has fused around the mount chip during sealing work for a cathode ray tube, the glass debris is heated, and then the glass debris softened by this heating is mounted. Since the glass particles are removed from the chip, the glass particles can be removed without any impact unlike conventional methods, and the subsequent sealing work can be performed well to obtain high-quality cathode ray tubes, while reducing the burden on the operator. It can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a conventional device, FIG. 2 is a perspective view showing an embodiment of the cathode ray tube manufacturing device according to the present invention, and FIG. 3 is a partial perspective view showing the main parts of the present invention. FIG. 4 is a partial explanatory diagram showing the process of removing glass debris according to the present invention, and FIGS. 8 and 9 are both perspective views showing other embodiments of the removing tool used in the present invention, FIG. 10 is a partially enlarged view showing other embodiments of the mount chip used in the present invention, and FIGS.
f and FIGS. 12a to 12g are both a side view and a plan view showing examples of the shape of the mount chip used in the present invention. 10... Braun tube, 12... Network section, 13
...Mount chip, 15...Glass scrap, 25,4
5, 46, 47... heating element, 26... removal tool.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a cathode ray tube, in which an electron gun supported on a mount chip is inserted into the neck of the cathode ray tube and sealed, and after the sealing, the mount chip to which glass waste is fused is pulled out from the cathode ray tube. separating the glass chips from the mount chip by heating the glass chips fused to the separated mount chips; and removing the separated glass chips from the mount chips without any destructive operation. A method for manufacturing a cathode ray tube, comprising the steps of: 2 A cathode ray tube manufacturing device that inserts and seals an electron gun supported by a mount chip into the neck of a cathode ray tube, which is provided for the mount chip to prevent glass debris from being fused to the mount chip during the sealing operation. A heating element that heats and separates it from the mount chip, and a removal tool that engages and moves the glass debris separated by the heating and removes it from the mount chip without destroying it. CRT manufacturing equipment featuring: 3. The cathode ray tube manufacturing apparatus according to claim 2, wherein a ring-shaped burner arranged around the glass scraps is used as the heating element. 4. The cathode ray tube manufacturing apparatus according to claim 2, characterized in that a pair of line burners facing each other with glass scraps in between is used as the heating body. 5. The cathode ray tube manufacturing apparatus according to claim 2, characterized in that a plurality of burners arranged approximately symmetrically around the glass scraps are used as the heating elements. 6. The cathode ray tube manufacturing apparatus according to claim 2, characterized in that a high-frequency coil placed around the glass scraps is used as the heating body. 7. The cathode ray tube manufacturing apparatus according to claim 2, characterized in that a laser beam is used as the heating body. 8. The cathode ray tube manufacturing apparatus according to any one of claims 2 to 7, characterized in that the remover is approximately U-shaped. 9. The cathode ray tube manufacturing apparatus according to any one of claims 2 to 7, characterized in that the removing device is a pair of plates configured to be openable and closable. 10. The cathode ray tube manufacturing apparatus according to any one of claims 2 to 9, wherein the fused portion of the mount chip with the glass waste is formed into a cylindrical shape having the same outer diameter. 11. The mount chip according to any one of claims 2 to 9, characterized in that the fused portion of the mount chip with the glass dust is formed into a tapered shape that tapers upward. CRT manufacturing equipment. 12. The cathode ray tube according to any one of claims 2 to 9, characterized in that the fused portion of the mount chip with the glass dust is formed into a curved side surface that swells outward. manufacturing equipment. 13. The cathode ray tube manufacturing apparatus according to any one of claims 2 to 12, characterized in that the fused portion of the mount chip with the glass waste is formed so that its end face has a gear-like shape. . 14. The cathode ray tube manufacturing apparatus according to any one of claims 2 to 12, characterized in that the fused portion of the mount chip with the glass waste is provided with a flat portion on the side surface thereof.