JPH049720Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cathode ray tube enclosing machine that supports a cathode ray tube bulb on a table with its neck facing downward and encapsulates an electron gun in the neck.

2. Description of the Related Art A conventional enclosing machine for enclosing an electron gun into the neck of a cathode ray tube bulb will be described below with reference to FIGS. 4 to 7. In the figure, 1 is a cathode ray tube bulb (hereinafter referred to as
2 is a valve support unit;
3 is a turntable, and valve support unit 2
is the valve support (table) 4 and the rubber ring 5
and rod 6, column 7, rotating block 8 and pulley 9
and a stem positioning block 10, and is rotatably supported on the turntable 3 via a bearing 16 by a shaft 8a which is directly connected to the rotary block 8 and has a pulley 9 attached to the bottom.
That is, as shown in FIG. 6, a plurality of valve support units 2 are controlled along the circumference of the turntable 3, and a belt 11 that rotates at a fixed position is arranged around the turntable 3 to form an arc-shaped structure. A belt 11 is attached to the pulley 9 of some of the valve support units 2 lined up.
are brought into contact with each other to rotate those valve support units 2. Then, as described later, after setting the valve 1 in the valve support unit 2 and inserting the electron gun 13, while rotating the valve support unit 2, as shown in FIG. The neck portion 1a near the stem 14 is heated from outside the support column 7, and the electron gun 13 is enclosed therein. Here, the table 4 has a support hole 4a through which the neck portion 1a of the valve 1 is inserted, and is fixed to the rotating block 8 via the support 7, and the funnel portion 1b is inserted through the support hole 4a. Support valve 1 vertically
Hold. A rubber ring 5 is disposed around the support hole 4a, and a rod 6 abuts against the side of the funnel portion 1b of the valve 1 on the table 4 to regulate the position of the valve 1. The stem positioning block 10 is inserted into the shaft 8a so as to be vertically movable with its center line aligned with the center line of the shaft 8a, and when the valve support unit 2 is rotated, it is engaged with the shaft 8a and the valve support unit 2 is rotated. rotates with. Further, as shown in FIGS. 4 and 7, the stem 14 of the electron gun 13 is set by a stem receiving jig 12 detachably attached to the upper part of the stem positioning block 10. When the model changes, only the stem receiving jig 12 is replaced accordingly. Here, as shown in FIG. 7, the stem receiving jig 12 and the stem positioning block 10 each have a pin 12a and a groove 1 into which the pin 12a fits.
0a is formed, and when the stem receiving jig 12 is attached and the stem positioning block 10 is rotated together with the valve support unit 2, the pin 12a is locked in the groove 10a and the stem receiving jig 12 is rotated.

The electron gun encapsulation process for the cathode ray tube based on the above configuration will be described below with reference to FIG. First, move the circumference of the turntable 3 to positions P ₁ , P ₂ , P ₃ , P ₄ , P ₅ ,
Divided into P ₆ , valve support unit 2 in P ₄ and P ₅
The belt 11 is brought into contact with the pulley 9 in an arc shape and runs, and the turntable 3 is intermittently rotated in the same direction. Then, the valve support unit 2
is sent intermittently sequentially to positions P ₁ , P ₂ , P ₃ , P ₄ , P ₅ , P ₆ and remains stationary at P ₁ , P ₂ , P ₃ , P ₆ and rotates at P ₄ and P ₅ , First, lower the stem positioning block 10 at _P1 ,
It is supplied with an electron gun 13, positioned, and sent to _P2 . Then, at P ₂ , valve 1 is placed on table 4.
After inputting the electron gun and regulating its position with the rod 6, the stem positioning block 10 is raised at _P3 and the electron gun 13 is inserted into the valve 1. At this time, when inserting the electron gun 13 into the valve 1, as shown in FIG. 8, the positions of the lead pins G ₁ , G ₂ . The positions of the lead pins G ₁ , G ₂ . Stem receiving jig 12
The location is regulated by Thereafter, the belt 11 contacts the pulley 9 at P ₄ and the valve support unit 2 begins to rotate, moving to an arc-shaped position P ₅
Then, the burner 15 heats the neck portion 1a near the stem 14, and the electron gun 13 is enclosed in the bulb 1. After the above-mentioned sealing, the valve 1 is taken out from the valve support unit 2 at a position _P6 where the turntable 3 has rotated once.

Problems to be Solved by the Invention By the way, as mentioned above, when enclosing the electron gun 13 in the bulb 1, the lead pins G ₁ , G ₂ . In order to arrange the valve 1 and the electron gun 13 in the valve support unit 2, the positions of the valve 1 and the electron gun 13 are controlled and set. However, when the valve support unit 2 starts rotating at position _P4 of the turntable 3, the belt 11 is attached to the pulley 9.
valve 1 with the shock when it touches and rotates.
However, as shown in FIG. 9, the table may be misaligned (dotted line in the figure) or tilted. Furthermore, when the turntable 3 decelerates intermittently, the valve position may shift due to inertia. Therefore, if there are two rods 6, the displacement of the valve 1 will be reduced, but the rods 6 will get in the way and make it difficult to close the valve 1. Furthermore, changing the size of the valve 1 makes it troublesome to change the position of the rod 6.

Conventionally, the positional deviation of the valve 1 shown in FIG. 9 is ±
30° was allowed and relatively no inconvenience occurred, but in recent years there has been a trend to mount the valve 1 in a socket 18 of a rectangular printed circuit board 17, as shown in FIG. Therefore, as shown in FIG. 11, if the printed circuit board 17 is tilted with respect to the valve 1, it becomes difficult to attach the printed circuit board 17 to the outside, and the positional deviation between the valve 1 and the electron gun 13 may be, for example, ±5 degrees. It's been requested.

Means for Solving the Problems The present invention is a valve support that is inserted through the neck of a cathode ray tube bulb to support the funnel and rotate while vertically supporting the bulb. A shaft that elastically protrudes and retracts is arranged in the tube, and the contact ball is elastically pressed against the anode button of the valve funnel supported by the valve support to regulate the position of the cathode ray tube bulb. Features.

Function: Support the valve vertically on the valve support with the neck facing down, and position the valve by pressing the contact ball against the anode button on the valve funnel.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a side view of the internal mechanism of a cathode ray tube enclosing machine according to the present invention, and FIGS. 2 and 3 are a schematic side view of the main part of FIG. 1 and a side view of the external appearance.
In the figure, 1 is a valve, 1a is a neck part of the valve 1, 1b is a funnel part of the valve 1, 1c is a face part of the valve 1, 5 is a rubber ring, 16 is an anode button of the funnel part 1b, 19 is a table, 20 is a contact ball, 21 is a shaft, 22 is a shaft receiver, 23 is a spring, 2
4 is a support rod. Valve support (table) 4
has a support hole through which the neck portion 1a of the valve 1 is inserted;
Vertical and support. The contact ball 20 is attached to a support portion 25 (second
(see figure) and is rotatably attached, with a part protruding from the anode button 16 of the funnel part 1b of the valve 1 on the table 19. The shaft 21 is supported movably in the axial direction by a shaft receiver 22 supported by a support rod 24, and a spring 23 connecting the contact ball 20 and the shaft receiver 22 via a support portion 25 is connected between the two. is fitted externally. The support rod 24 rotatably supports the shaft receiver 22 in the vertical direction, and is attached to the table 19 so as to be movable along the surface direction. That is, the support rod 24
As shown in FIG. 1, the movable portion 27 is vertically attached to a movable portion 27 that reciprocates within a guide 26 attached to the table 19 along the surface direction of the table 19. As shown in FIG.

The operation will be explained based on the above configuration. First, as shown in Fig. 6, position P ₂ of the turntable 3 is set.
Then, as shown in FIG.
Adjust the contact ball 20 so that it hits the anode button 16 of the funnel portion 1b when the valve 1 is vertically supported on the table 19 by moving it along the surface direction of the valve 9 and rotating the shaft receiver 22. . Then, with the turntable 3 rotated and the belt 11 running, the stem positioning block 10 is lowered at position _P1 in FIG. 6, and an electron gun (not shown) is supplied thereto for positioning. Then, in position _P2 in FIG. 6, the contact ball 20 is partially fitted into the anode button 16, and the neck portion 1a is inserted into the support hole of the table 19, and the valve 1 is put into the table 19 and vertically Support (Figure 1). At this time, the position of the support rod 24 and the angle of the shaft receiver 22 are adjusted to position the contact ball 20 slightly inside the funnel portion 1b. Then, put the valve 1 into the turntable 19 and press the anode button 1.
When the contact ball 20 is fitted into the contact ball 6, the contact ball 20 is pressed by the anode button 16 against the biasing force of the spring 23.
Conversely, the contact ball 20 is pressed against the anode button 16 by the repulsive force of the spring 23, and the position of the valve 1 is fixed. According to experiments,
It was confirmed that the positional deviation of valve 1 could be kept within ±3°.

Effects of the invention According to the invention, when a cathode ray tube bulb is vertically supported on a table with its neck facing downward and an electron gun is sealed in the neck, a contact ball is pressed against the anode button in the funnel of the bulb. Since the position of the valve is regulated on the table, the valve position at the time of sealing can be kept within ±3°, making it possible to meet market demands.

[Brief explanation of the drawing]

Fig. 1 is a side view of the internal mechanism of a cathode ray tube encapsulation machine according to the present invention, Fig. 2 is a schematic side view of the main parts of Fig. 1, and Fig. 3 is an external side view of the main parts of the encapsulation machine of Fig. 1. ,
Fig. 4 is a partially sectional side view of a valve support unit of a conventional cathode ray tube encapsulant, Fig. 5 is a perspective view of the valve support unit of Fig. 4, and Fig. 6 is a cathode ray tube encapsulant of Fig. 4. 7 is a perspective view of the stem positioning block of the valve support unit shown in FIGS. 4 and 5, and FIG. 8 is a bottom view of the valve in which the electron gun is enclosed. 9
FIG. 10 and FIG. 11 are diagrams for explaining conventional problems. 1...Cathode ray tube bulb, 1a...Network part, 1
b...Funnel part, 16...Anode button,
19...table, 20...contact ball,
21...Shaft, 22...Shaft receiver, 23
...Spring, 24...Support rod.

Claims (1)

[Scope of utility model registration request] A valve support body that is inserted through the neck of a cathode ray tube bulb to support the funnel part, vertically support the bulb, and rotate, has a contact ball integrated at its tip and a shaft that elastically protrudes and retracts in the axial direction. . A cathode ray tube enclosing machine, characterized in that the contact ball is elastically pressed against an anode button of a valve funnel supported by a valve support to regulate the position of the cathode ray tube bulb.