JP3312466B2 - Spring holder welding method, spring holder inclination restricting device used for the welding method, and cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring holder welding method , a spring holder inclination restricting device used in the welding method, and a cathode ray tube manufactured by the welding method , and more particularly to a color selection mechanism used in a trinitron tube. those of the spring holder welding method for welding the spring holder to the frame of the aperture grill (AG), relating <br/> the spring holder tilt regulating device and a cathode ray tube manufactured by the welding method used in the welding process It is.

[0002]

2. Description of the Related Art As shown in FIG. 6, an aperture grill (AG) as a color selection mechanism used in a trinitron tube is composed of an AG mask 2 made of a thin metal plate having a large number of elongated slits 2a and an AG frame. And a horizontal frame 3a and a vertical frame 3b.

[0003] The AG1 thus configured is arranged close to the phosphor screen on the inner surface of the panel 10 of the trinitron tube. The arrangement method is such that the spring holder 4 welded to the AG frames 3a, 3b, and the spring holder 4
This is done by fitting the fixing pin 11 of the panel 10 via the spring 5 welded to the panel 10.

[0004] As shown in FIG. 7, the AG frame 2a, which usually spreads upward by about 3 °, is spot-welded with the spring holder 4 so as to follow the sides (FIG. 8). As shown in the figure, a flat aperture grill (F) is
AG) is spot-welded to the horizontal frame 3a, and after pressurization is completed, unnecessary portions at both ends are trimmed to form an oxide film.
A blackening heat treatment is performed to remove the strain.

[0005] Through such a series of manufacturing steps, the tension of the AG mask 2 is applied to the frame, so that the AG1 has the spring holder surface 4a as shown in FIG.
It is designed to be substantially perpendicular to a. The reason is to firmly fit the above-mentioned fixing pin 11 on the inner surface of the panel and the spring 5 attached to the spring holder 4.

[0006]

In the manufacture of the above AG1, the AG mask surface 2a and the spring holder surface 4a are subjected to the blackening heat treatment at the final stage depending on the lot.
May not be vertical as designed due to the variation in the tension, and the AG1 cannot be firmly fitted to the panel 10.

[0007] The view of the above problems the invention is finally spring holder welding method capable of retaining substantially vertically spring holder surface AG mask surface, a spring for use in the welding direction <br/> method Holder tilt control device and its
It is an object of the present invention to provide a cathode ray tube manufactured by the above welding method .

[0008]

In order to solve the above problems SUMMARY OF THE INVENTION, spring holder welding method of the present invention according to claim 1, spring holder welding method odor welding the spring holder to the color selection mask frame of a cathode ray tube
The color selection mask of the above color selection mask frame is welded.
The color selection mask to a straight line perpendicular to the surface
Of the spring holder that is inclined in the direction in which the
Upon welding the spring holder to the welding surface, and welding the said spring holder at a predetermined angle with respect to the welding surface of the spring holder, the predetermined
Angle the color selection mask on the color selection mask frame
After a certain processing step including the step of welding
The spring holder surface is almost perpendicular to the work surface
It is characterized by a correction angle .

[0009] Spring holders welding method according to claim 2 of the present invention according to claim 1, said spring holder
ー is spot welding.

[0010] To solve the above-mentioned problems, a third aspect of the present invention is provided.
The invention according to the present invention is used for a spring holder welding method.
A spring holder inclination control device,
The surface to which the color selection mask of the color selection mask frame is welded
The welding surface side of the color selection mask is wider than the straight line that makes a right angle.
On the welding surface of the spring holder that is inclined in the
The spring holder so that it is at the specified angle.
It has at least two pairs of gripping pieces facing each other for clamping.
Then, the predetermined angle is set on the color selection mask frame.
After a certain processing step including the step of welding the color selection mask,
The spring holder surface above the color selection mask surface
Use the above spring holder as a correction angle to make it almost vertical
It is characterized by being pinched .

[0011] In order to solve the above-mentioned problems, a fourth aspect of the present invention is provided.
Is a color selection mask of a color selection mask frame.
The color selection mask against a straight line perpendicular to the surface to which the
Spring inclined in the direction in which the welding surface side of the disc expands
Upon welding the spring holder to the welding surface of the holder, the spring holder is welded at an angle to the weld surface of the spring holder, the predetermined
The angle of the color selection mask frame to the color selection mask frame.
After a certain processing step including the step of welding
The spring holder surface is almost perpendicular to the disk surface.
And a color selection electrode having a correction angle which is different from that of the color selection electrode.

[0012]

According to the spring holder welding method according to claim 1-2 of the present invention, with respect to the welding surface of the cathode ray tube of the color selection mask frame 3a, welded spring holder 14 at a predetermined angle (preferably spot welding) Therefore, the surface of the color selection mask 2 and the spring holder 14 can be finally brought into a predetermined angular relationship (preferably perpendicular). Therefore, the color selection mechanism can be firmly attached to the fixing pin of the panel of the cathode ray tube via the spring.

According to the spring holder inclination restricting device according to claim 3 of the present invention, the spring holder surface 4
a has at least two sets of opposed gripping pieces for holding the spring holder 4 at a predetermined angle with respect to the welding surface of the color selection mask frame of the cathode ray tube. The holder 4 can be arranged vertically, for example, and the color selection mechanism (color selection mask with frame) 1 can be firmly attached to the panel 10 of the cathode ray tube.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a state in which a spring holder is attached to an AG frame at an angle of 1 ° (angle) by a conventional method. That is, as shown in FIG. 1, this AG frame lot is formed by the above-mentioned conventional spring holder welding method (up to the blackening step).
The mounting surface 4a of the spring holder 4 is inclined by 1 ° (the angle is exaggerated) with respect to the perpendicular to the mask surface 2a. Therefore, the spring holder 4 is not vertically arranged with respect to the AG mask 2.

Therefore, in this embodiment, the spot welding of the spring holder was performed on the remaining same lot as follows so as to correct the 1 ° inclination (defective state) shown in FIG. In the drawings used in the description of the present embodiment, the same elements as those in the drawings used in the prior art are denoted by the same reference numerals.

FIG. 2 is a schematic view for explaining a spring holder welding method according to the present invention. FIG. 2 shows FIG.
The spring holder 4 is attached to the welding surface of the horizontal frame 3a, which is an AG frame, to correct the defective state shown in FIG.
Is held at an angle of 1 ° outward and pressurized using the front electrode 20a and the back electrode 20b to perform spot welding. Note that the inclination restricting device 1 described in detail later as a method of restricting the angle (inclination).
2 is used.

After the spring holder 4 is spot-welded to the AG frame 3a at an angle of 1 ° to the AG frame 3a, a flat aperture, which is a material of an aperture grill (AG) mask as a color selection mask for a trinitron tube, is formed on the horizontal frame 3a. Spot welding the grill (FAG). In this embodiment, as in the prior art, the horizontal frame 3a is previously pressurized in the direction of the arrow as shown in FIG. 9 before this welding step. 3a.

After the welding of the FAG, when the pressurization shown in FIG. 9 is terminated, even if the FAG is welded to the frame, the horizontal frame 3a is slightly returned by the turnbuckle, and then the FAG is released.
The unnecessary portions at both ends of the AG are trimmed, and the above-described heat treatment for blackening and removing distortion is performed. The heat treatment is performed in an oxidizing atmosphere.

FIG. 3 is a schematic sectional view of the AG thus obtained. As shown in FIG. 3, the surface of the AG mask 2 and the surface of the spring holder 4 were substantially perpendicular (90 °). That is, in the present embodiment, the regulating portion 12 of the tilt regulating device is used.
Then, the spring holder was corrected by 1 ° to make the AG mask surface 2a and the spring holder surface 4a perpendicular to each other, so that the spring was fitted well to the panel.

Next, FIG. 4 is a side view showing the angle of the spring holder used for welding the spring holder 4 to the frame described above, and FIG. 4 is an enlarged view of the restricting portion 12 of the inclination restricting device of FIG. 4 and its vicinity. 5 will be described.

As shown in FIGS. 4 and 5, the inclination restricting device includes a restricting portion 12 and a cylinder portion 13. In particular, as shown in an enlarged manner in FIG. 5, the restricting portion 12 and its vicinity hold the spring holder 4 at a predetermined angle with respect to the horizontal frame 3a of the AG frame. The holding is performed by a holder holding portion 16 integrally connected to the slide block 15 and a holder holding portion 18 connected to the slide block 17. The holder holders 16 and 18 have a total of 4
Individual Kamaboko-shaped spring holder retainers 19a, 19
b, 19c and 19d are provided, and these four spring holder pressers 19a, 19b, 19c and 19d are provided.
With this, the spring holder 4 is held.

A hydraulic cylinder 21 is mounted on the slide block 17, and a hydraulic cylinder rod is connected to the slide block 17 via a cylinder joint 22. When the hydraulic cylinder 21 operates to retract, the spring holder 4 is firmly held by the spring holder holding portions 16 and 18 as described above. At this time, the spring holder 4 is set between the spring holder holding portions 16 and 18 at a predetermined angle. The predetermined angle is adjusted by increasing or decreasing the inclination adjusting plate 23 composed of a plurality of steel plates disposed immediately below each spring holder retainer.

Thereafter, the air cylinders 25 and 26 are actuated to press the set spring holder 4 against the AG frame 3a, and then sandwiched between the front electrode 20a and the back electrode 20b (see FIG. 2) to perform spot welding. In the figure, one spring holder 4 is attached to the AG frame 3a.
° is inclined.

[0024]

As described above, according to the present invention, F
Even if an external influence such as a pressure change for adjusting the tension is applied in the AG (AG mask) welding, the AG is set so that the spring holder surface is finally substantially perpendicular to the AG mask surface.
The spring holder can be welded to the frame. Therefore, the color selection mechanism can be firmly attached to the fixing pins of the panel of the cathode ray tube via the spring.

[Brief description of the drawings]

[Fig. 1] The spring holder is at 1 ° to the AG mask surface.
FIG. 4 is a schematic cross-sectional view showing a state where the camera is tilted and attached to an AG frame.

FIG. 2 is a schematic view for explaining a spring holder welding method according to the present invention.

FIG. 3 is a schematic sectional view showing a welded portion obtained according to the present invention.

FIG. 4 is a side view showing a spring holder inclination restricting device according to the present invention.

FIG. 5 is an enlarged view of a restricting portion of the tilt restricting device of FIG. 4 and its vicinity.

FIG. 6 is a perspective view of a color selection mechanism.

FIG. 7 is a sectional view of an AG frame.

FIG. 8 is a sectional view of a spring holder attaching portion to the AG frame.

FIG. 9 is a schematic diagram showing AG frame pressurization during welding.

FIG. 10 is a sectional view for explaining an angle between an AG mask surface and a spring holder.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Aperture grill (AG) 2 AG mask 2a Slit 3a Horizontal frame (AG frame) 3b Vertical frame (AG frame) 4 Spring holder 5 Spring 10 Panel 11 Fixing pin 12 Restriction part of inclination restriction device 13 Cylinder part of inclination restriction device 15 Slide block 16, 17 Holder holder 19a, 19b, 19c, 19d Spring holder holder 20a Front electrode 20b Back electrode 21 Hydraulic cylinder 22 Cylinder joint 23 Tilt adjusting plate 25, 26 Air cylinder

Claims (4)

(57) [Claims] 1. A spring holder welding method for welding a spring holder to a color selection mask frame of a cathode ray tube.
In the above, the color selection mask of the color selection mask frame is welded.
Welding side of the color selection mask with respect to a straight line perpendicular to the surface
Of a spring holder that is inclined in the direction in which
When welding the spring holder to the surface ,
The spring holder is welded at a predetermined angle to the welding surface of the pulling holder , and the predetermined angle is
Dissolves the color selection mask into the color selection mask frame
After a certain processing step including a contacting step, the above-mentioned color selection mask surface
Correction that the spring holder surface is almost vertical
Spring holder welding method characterized by being an angle . 2. The method according to claim 1, wherein the welding of the spring holder is spot welding. 3. A spring holder inclination regulating device used in a spring holder welding method, wherein a color selection mask of a color selection mask frame of a cathode ray tube is welded.
Of the color selection mask against a straight line perpendicular to the surface
Spring holder inclined in the direction in which the contact surface spreads
Against the welding surface has at least two pairs of gripping piece opposite for clamping the spring holder to a predetermined angle, the predetermined angle, the Irosen to the color selection mask frame
After a certain processing step including the step of welding another mask,
The spring holder surface is almost perpendicular to the selection mask surface.
Hold the above spring holder as a correction angle to be straight
A spring holder inclination restricting device, characterized in that: 4. The color selection mask of the color selection mask frame
A color selection mask for a straight line perpendicular to the surface to be welded
The spring holder that is inclined in the direction in which the welding surface side of
Upon welding the spring holder to the welding surface of the loaders, the spring holder at an angle to the weld surface of the spring holder is welded, the predetermined angle, the color to the color selection mask frame
After a certain processing step including the step of welding the selection mask ,
Above spring holder surface is roughly equivalent to color selection mask surface
A cathode ray tube comprising a color selection electrode having a vertical correction angle .