JPH0125180B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an adjustment gauge for a jig used for sealing a panel glass and a funnel glass of a cathode ray tube. This relates to a stopper position adjustment gauge.

FIG. 1 is a schematic cross-sectional view of a cathode ray tube. In the figure, 1 is panel glass, 2 is funnel glass, 3 is neck glass, and 4 is solder glass for bonding panel glass 1 and funnel glass 2 together. 5 is an anode button sealed to the funnel glass 2; 6 is a fluorescent surface formed on the inner surface of the panel glass 1; 7 is an electron gun; and 8 is a lead electrically connected to the electron gun 7.

The cathode ray tube shown in FIG.
An image can be obtained on the fluorescent surface 6 by applying a suitable voltage to each electrode of the electron gun 7 through the electron gun 7 and further applying a high voltage of 10 to 30 KV to the anode button 5. It is well known that this image is viewed on color television sets.

In such a cathode ray tube, in order to obtain a correct image as planned on the fluorescent surface 6, the positional relationship between the fluorescent surface 6 and the electron gun 7 must be as designed. The suitability of the positional relationship between the fluorescent surface 6 and the electron gun 7 is actually determined by the positional relationship between the panel glass 1 and the funnel glass 2.
This is clear from FIG. Both are bonded to each other via solder glass 4 in a sealing process, and in this sealing process, the alignment state of panel glass 1 and funnel glass 2 is adjusted using a sealing jig.

FIG. 2 is a schematic sectional view when the two are sealed in a mismatched state, and FIG. 3 is a schematic plan view of the same. The positional deviations with respect to the design standards at three alignment positions 9 and 10 set for both are respectively expressed as a, b, and c (mm), but usually these are 0.6 mm or less. is set to

As described above, there are very strict requirements regarding the misalignment between the panel glass 1 and the funnel glass 2 with respect to the design standard, and thus various efforts have been made to achieve proper alignment.

A conventional adjustment method is shown in FIGS. 4 and 5. That is, a standard bulb 11 consisting of a panel glass 1 and a funnel glass 2 which have been bonded together in an aligned state is attached to a jig 12, and the panel glass support stopper 13 and funnel glass support stopper 14 of this jig 12 are attached to both glasses. 1,
The adjustment of the jig 12 is completed by adjusting the position by moving it in and out in the directions of arrows A and B so that it contacts the alignment positions 9 and 10 of No. 2, and then sealing is performed on the jig 12 that has completed this adjustment. A method has been used in which a panel glass 1 and a funnel glass 2 are attached and bonded together in a state in which they are aligned.

However, such a conventional method has the disadvantage that the degree of contact between each stopper 13 and 14 and each alignment position 9 and 10 of panel glass 1 and funnel glass 2 depends on the operator's judgment. This also caused misalignment due to improper adjustment of the jig. In addition, in recent years, the quality of cathode ray tubes has progressed further, and the requirement for misalignment between panel glass 1 and funnel glass 2 has become stricter, from 0.6 mm to 0.3 mm. The existing adjustment methods have become unable to meet this demand.

This invention was made in order to meet the above-mentioned drawbacks and demands, and was made for the purpose of quantitatively setting the position of a stopper for supporting panel glass with reference to the position of the stopper for supporting funnel glass. .

Next, an embodiment of the present invention will be described with reference to FIGS. 6, 7, and 8.

FIG. 7 shows a state in which the adjustment gauge 15 is attached to the jig 12. The adjustment gauge 15 is constructed by attaching a simulated panel 18 with adhesive to a standard simulated funnel 17 to which a simulated neck 16 is correctly connected, and a displacement measuring gauge 20 is attached to this simulated panel 18 using a holder 19. Displacement measurement gauge 20
are provided corresponding to each alignment position 9 of the panel glass 1 described above. In other words, when the adjustment gauge 15 is attached to the jig 12 and the funnel glass support stopper 14 of the jig 12 is in contact with the alignment position 10a of the standard simulated funnel 17, the displacement measuring gauge 20 is fixed to the panel support stopper. 13.

21 is a sensing rod of the displacement measuring gauge 20. As is clear from FIG. 8, the displacement measurement gauges 20 are provided at three locations on the simulated panel 18 so as to face each panel glass support stopper 13.
In addition, the alignment position 10a of the standard simulated funnel 17 is also adjusted to each funnel glass support stopper 1.
4 are provided at three locations facing each other.

On the other hand, a jig 12 for aligning the panel glass 1 and the funnel glass 2 and sealing them together.
As shown in FIGS. 7 and 8, a support member 25 is provided at the upper end of a column 24 having a base 23, and a panel glass support stopper 13 and a funnel glass are installed at three locations on this support member 25, respectively. A holder 26 having a support stop 14 is provided. Note that these stoppers 13 and 14 are provided so as to correspond to each panel glass alignment position 9 and funnel glass alignment position 10, respectively.

Using the adjustment gauge 15 as described above, the jig 1
In order to correctly adjust the positions of the panel glass support stopper 13 and the funnel glass support stopper 14 in accordance with the design standards, first, the indicated value of the displacement measurement gauge 20 of the adjustment gauge 15 is adjusted to the tip of the sensing rod 21. Set the alignment position so that it is flush with the alignment position of the standard simulated funnel 17, then move the sensing rod 21 in and out while looking at the reference value, and apply the instruction to the funnel glass of the panel glass 1 to be sealed. It is necessary to match the value corresponding to the design reference position for 2. This operation is performed, for example, as shown in FIG.
a, and in this state, the sensing rod 21 of the displacement measuring gauge 20 is projected and its tip is brought into contact with the flat block 27, and the indicated value at this time is read and taken as the reference value _l0 . Next, the sensing rod 21 is moved in and out to shift the indication of the displacement measuring gauge 20 in the positive or negative direction by the absolute value of the design standard value _l1 with respect to the standard value _l0 . The instruction value at this time is the set value l. That is, l=l ₀ +l ₁ (l ₁ is a positive or negative value).

After calculating the set value l of the displacement measurement gauge 20 in this way, the funnel glass support stopper 13 and the panel glass support stopper 14 of the jig 12 are adjusted.
Make adjustments.

In this operation, first, the adjustment gauge 15 is attached to the jig 12, and then each funnel glass support stopper 14 is brought into contact with each funnel glass alignment position 10a of the standard simulated funnel 17. 13 is brought into contact with the tip of the sensing rod 21 of the corresponding displacement measuring gauge 20. At this time, the displacement measurement gauge 20 is set to a set value l.

By the above operation, the panel glass support stopper 1 is connected to the funnel glass support stopper 14.
3 has been determined, the adjustment gauge 15 is then removed from the jig 12, and the funnel glass 2 and panel glass 1 are attached to the jig 12.
Install. From that state, each alignment position 9, 10 is adjusted to the corresponding stopper 13, 1.
4. This state is shown in FIG.
The panel glass 1 and the funnel glass 2 are thus aligned, and then the jig 12 is placed in a continuous furnace (not shown) to seal them together. in this case,
If a dial gauge is used as the displacement measuring gauge 20, the pressing force is small and almost constant, so that it always contacts the stopper with a constant pressure and exhibits excellent reproducibility. In addition, the setting becomes quantitative, allowing accurate setting down to 1/100 units, and when changing the set value l, the change can be made by simply changing the reading of the displacement measuring gauge 20. Note that as the standard simulated funnel 17, an actual funnel glass may be used, or one separately manufactured by machining may be used.

As detailed above, according to the present invention, the relative position of the panel glass support stopper with respect to the funnel glass support stopper of the sealing jig can be quantitatively set using a displacement measurement gauge. Therefore, the funnel glass of the cathode ray tube and the panel glass can be aligned with much less misalignment than in the conventional case. Therefore, it is possible to provide a high-quality cathode ray tube.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing a cathode ray tube, FIG. 2 is a schematic sectional view showing a cathode ray tube when panel glass 1 and funnel glass 2 are sealed in a mismatched state, and FIG. FIG. 4 is a partially cutaway side view showing the adjustment state of a conventional sealing jig; FIG. 5 is a view taken from the direction shown in FIG. 4; FIG. 8 show an embodiment of the present invention, FIG. 6 is a side view showing the setting state of the reference value l ₀ of the displacement measuring gauge 20, and FIG. 7 shows the adjusting state of the sealing jig 12. A partially cutaway side view, FIG. 8 is a view taken from the direction of FIG. 7. 1...Panel glass, 2...Funnel glass, 9...Panel glass alignment position, 1
0, 10a...Funnel glass alignment position, 11...Standard bulb, 12...Jig, 13
... Panel glass support stopper, 14 ... Funnel glass support stopper, 15 ... Adjustment gauge,
17... Standard simulation funnel, 18... Simulation panel, 20... Displacement measurement gauge, 21... Sensing rod,
l...Setting value, _l0 ...Reference value, _l1 ...Design reference value.
In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1 An adjustment gauge for adjusting the position of a funnel glass support stopper and a panel glass support stopper provided on a jig for supporting the funnel glass and panel glass of a cathode ray tube in a predetermined positional relationship, which is a standard simulation gauge. When the simulated panel is fixed to the funnel and the funnel glass support stopper is in contact with the alignment position of the standard simulated funnel, a displacement measuring gauge facing the panel glass support stopper is provided at the alignment position of the simulated panel; An adjustment gauge for a sealing jig, characterized in that the displacement measuring gauge is configured to quantitatively set the relative position of a panel glass support stopper with respect to a funnel glass support stopper.