JPH0424592Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a jig for sealing the panel and funnel of a cathode ray tube.

[Prior Art] Generally, in a color cathode ray tube, as shown in FIG. A shadow mask (not shown), which is a color selection electrode, is arranged opposite to the phosphor screen, and an electron gun 5 is enclosed in the neck portion 4 of the funnel 2.

Here, extremely high precision is required for the relative positions of the phosphor screen, shadow mask, and electron gun 5, and the size is a factor that influences the operating characteristics of the color cathode ray tube. That is, panel 1
Accurately aligning and sealing funnel 2 and funnel 2 is one of the most important steps in manufacturing color cathode ray tubes.
For this reason, panel 1 and funnel 2 have three
Panel alignments 6 and funnel alignments 7 are provided as reference points.

6 and 7 show a conventional sealing jig for sealing the panel 1 and funnel 2 together. In the figure, 11a, 11b, 11
c is a panel alignment support part that faces the panel alignment 6 at three locations, 12a, 12b, 12
13 is a yoke support portion that is in contact with the funnel yoke portion 8;
is a neck support portion that is in contact with the neck portion 4. Panel alignment support parts 11a, 11b, 11c
and funnel alignment support part 12a, 1
2b and 12c are each provided with a fine adjustment mechanism (not shown) for adjusting the alignment between the panel 1 and the funnel 2. Further, the yoke support portion 13 and the neck support portion 14 are generally fixed to the jig main body 16 as a non-adjustable integral structure.

Here, a sealing process using the above-mentioned sealing jig will be explained. Funnel 2 coated with fritted glass 3
When set on the sealing jig, the funnel 2 is held by the three funnel alignment support parts 12a, 12b, 12c, the yoke support part 13, and the neck support part 14, and when the panel 1 is set on this, the funnel 2 is It is held by the panel alignment support parts 11a, 11b, and 11c. next,
This is carried into a heat treatment furnace by a belt conveyor, and the frit glass 3 is crystallized under preset sealing conditions, for example, 450° C., and the panel 1 and the funnel 2 are aligned and sealed. After completing this step, the sealing jig is either sent back to the entrance of the heat treatment furnace or stored until the next opportunity to use it.

[Problems to be solved by the invention] In the conventional sealing jig as described above, the yoke support part 13 and the neck support part 14 are fixed to the jig main body 16 as an integral structure that cannot be adjusted. Therefore, it is a special jig that is compatible only with specific types of cathode ray tubes.

In recent years, as market demands have diversified, color cathode ray tubes have become increasingly diverse, and not only the screen size, but also the shape of the envelope, the outer diameter of the neck portion 4, etc., are diverse, and conventional sealing With regard to jigs, a special sealing jig must be made for each type of product, which poses problems in that it requires a large amount of equipment cost and a vast amount of storage space.

This idea was made to solve the problems mentioned above, and it can be used in many different products.
It is an object of the present invention to provide a sealing jig for cathode ray tubes that can reduce equipment costs and space.

[Means for Solving the Problems] In the sealing jig according to this invention, a head portion including an alignment support portion, a yoke support portion, and a neck support portion is detachably attached to a jig base. It is something.

[Function] In this invention, the alignment support portion, yoke support portion, and neck support portion are appropriately set according to the size of the screen of the cathode ray tube to be sealed, the shape of the yoke portion, and the outer diameter of the neck portion. Since the dedicated head section can be replaced with respect to the jig base, the jig base can be used in common when sealing various types of cathode ray tubes.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings.

In FIG. 1 and FIG. 2, 15 indicates panel alignment support portions 11a, 11b, 11c, funnel alignment support portions 12a, 12b, 12
c, yoke support part 13, and neck support part 14
16 is a jig base which is placed on a floor surface such as a belt conveyor and supports the head part 15.

The head portion 15 and the jig base 16 are fastened together by a plurality of bolts 17 and nuts 18 at respective fastening portions 15a and 16a.

In the above configuration, since the head portion 15 is detachable from the jig base 16,
A dedicated head section 15 is prepared in advance for each type of cathode ray tube, in which panel alignment support sections 11a, 11b, 11c, funnel alignment support sections 12a, 12b, 12c, yoke support section 13, and neck support section 14 are set. By doing so, these can be appropriately selected and attached to the jig base 16, and the jig base 16 can be used in common for sealing various types of cathode ray tubes.

Therefore, equipment costs can be reduced, and the sealing jig storage space can be significantly reduced.

In the above embodiment, the head section 15 and the jig base 16 are
was fastened with bolt 17 and nut 18, but
As shown in FIG. 3, for example, the jig base 16 is provided with a fitting portion 16b consisting of a protrusion, and the head portion 15 is provided with a fitted portion 15b consisting of a hole, and the two are fitted together. If the fitting condition between the two is relatively loose, the head portion 15 can be easily replaced by an automatic machine or a robot.

In this case, the loosely fitted head portion 15
A rod-shaped support member 19 whose height is adjusted in advance is provided on the jig base 16 in order to support the jig base 16.

As shown in FIG. 4, this support member 19 is set at a height that supports the head portion 15 so as to tilt it in the direction of arrow G. As a result, when the cathode ray tube is set, the panel alignment 6 and the funnel alignment 7 are always aligned by the corresponding alignment supports 11a, 11b, 11c and 12a, by the action of their own weight.
12b and 12c, and even if vibrations are applied from the outside during the sealing process, the consistency between the panel 1 and the funnel 2 will not be impaired. At this time, as shown in FIG. 3, the matching surface S between the panel 1 and the funnel 2 forms constant angles α and β with respect to the horizontal plane L.

Therefore, in this embodiment, the same effects as those of the previously described embodiment can be achieved, and the work of replacing the head portion 15 with respect to the jig base 16 can be easily performed by an automatic machine or a robot. become.

[Effects of the invention] As described above, according to this invention, the sealing jig base can be used in common for many types of cathode ray tubes, which reduces equipment costs and reduces the storage cost of the sealing jig. Space can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the sealing jig according to this invention, Fig. 2 is a plan view of the same, Fig. 3 is an exploded perspective view showing another embodiment, and Fig. 4 is a longitudinal sectional view of the same. figure,
FIG. 5 is a perspective view showing a schematic configuration of a color cathode ray tube, FIG. 6 is a longitudinal sectional view showing a conventional sealing jig, and FIG. 7 is a plan view thereof. 1...Panel, 2...Funnel, 4...Network section, 6...Panel alignment, 7...Funnel alignment, 8...Yoke section, 11a, 1
1b, 11c...Panel alignment support part, 1
2a, 12b, 12c...Funnel alignment support part, 13...Yoke support part, 14...Neck support part, 15...Head part, 16...Jig base. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An alignment support part that contacts an alignment provided on a panel and funnel of a cathode ray tube, a yoke support part that contacts a yoke part of a funnel of the cathode ray tube, and a neck support part that contacts a neck part of the cathode ray tube. A sealing jig for a cathode ray tube, comprising: a head portion comprising the alignment support portion, a yoke support portion, and a neck support portion; and a jig base for detachably attaching the head portion. Pipe sealing jig.