JP3326979B2 - Identifying the spring welding spot on the aperture grill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining a position where a panel mounting spring is welded to an aperture grill constituting a color cathode ray tube (hereinafter abbreviated as CRT).

[0002]

2. Description of the Related Art In a trinitron type CRT used for a television receiver or a monitor television of a computer, a large number of slits are formed inside a panel in which fluorescent paints of three primary colors (R, G, B) are applied on the inner surface. An aperture grill is attached, and the electron beams for the three primary colors emitted from the electron gun pass through the slits of the aperture grill and are applied to fluorescent paint portions of the corresponding color on the inner surface of the panel.

[0003] The aperture grill is composed of a frame formed in a substantially rectangular frame shape by four members of upper, lower, left and right, and a grill stretched over the frame. Many slits are formed extending vertically. The panel has a substantially rectangular panel portion in which the fluorescent paint is applied to an inner surface,
The panel includes four upper, lower, left, and right skirts extending inward from four sides of the panel, and the panel is formed to be slightly larger than the grill.

To mount the aperture grill to the panel, a spring for mounting the panel is welded to three or four members of the aperture grill, and the pin holes of the spring and the inner surfaces of the three or four skirt portions of the panel are attached. This is performed by engaging the pin that has been worn.

If the distance between the surface of the grill and the inner surface of the panel is different from the design value in the state where the aperture grill is mounted on the panel in this way, the electron beam passing through the slit of the grill will cause the corresponding fluorescent paint on the panel to be applied. Irradiation is not accurately performed on the spot, which causes a problem such as color misregistration in a completed CRT. For this reason, in a CRT requiring a high definition, such as a monitor television of a computer, it is important that the distance between the surface of the grill and the inner surface of the panel always be as designed at any location.
The position of the grill surface relative to the inner surface of the panel is determined by the position of the panel pins and the position of the aperture holes in the aperture grill. When the aperture grill is mounted on the panel, the pins are already attached to the panel. ,conventionally,
The welding position accuracy of the spring for each member was increased.

[0006]

However, if the pin of the panel is attached to the skirt portion which is slightly deviated from the proper position, or if the inner surface of the panel portion is twisted, the inner surface of the panel portion may be disturbed. If the pin position is incorrect, in this case, even if the spring is precisely welded to each member and the pin hole position with respect to the grill surface is accurate, the grill surface and panel The distance between the inner surfaces of the parts deviates from the design value depending on the location. Further, even if the position of the pin with respect to the inner surface of the panel portion and the welding position of the spring with respect to each member are accurate, if the grill is twisted due to distortion of each member, the position of the pin hole with respect to the surface of the grill is incorrect. This is accurate, and the gap between the inner surface of the panel portion of the panel and the grill surface of the aperture grill attached to the panel may deviate from the designed value depending on the location. That is, if one or both of the position of the pin with respect to the inner surface of the panel portion and the position of the pin hole with respect to the surface of the grill are incorrect, the gap between the surface of the grill and the inner surface of the panel portion is always as designed at any location. However, as a result, both the panel and the aperture grille are determined to be defective in the inspection after the aperture grille is mounted on the panel, and the yield is reduced.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a case in which the position of a pin with respect to the inner surface of a panel portion is shifted, or the grill of an aperture grill is twisted. However, in the CRT after completion, the spring welding portion of the aperture grill can be determined so that the electron beam passing through the grill can be accurately irradiated on the corresponding fluorescent paint portion of the panel portion. It is to provide a method.

[0008]

In order to achieve the above object, the present invention comprises a panel portion and four upper, lower, left and right skirt portions extending from four sides of the panel portion. At least three skirts are provided with aperture grill mounting pins, and a panel is mounted on a base on which a welding machine is installed so that the heights of the three pins are the same. And a panel mounting spring having a pin hole engageable with the pin is welded to at least three of the four sides facing the respective skirts, which are disposed inside the panel, A color cathode-ray tube having a color identification grill arranged facing the panel portion and an aperture grille extending inside the four side portions, wherein the spring is provided on a side portion of the aperture grille. At the time of welding, the height from the base to the attachment position of the three pins is measured with reference to the base, and the height of a plurality of measurement points on the panel portion is measured. When calculating the heights of a plurality of measurement points of the panel unit from the plane including the three pins with reference to the plane including the three pins, and attaching the aperture grill to the panel via the pins and springs By measuring the height of the plurality of measurement points of the grill facing each measurement point of the panel section from the base with reference to the base, the same height as the pins when engaged with the pins is measured. The height of a plurality of measurement points of the grille is calculated from the plane including the three pin holes with reference to the plane including the three pin holes located at a position, and the panel is attached to the panel via the pins and springs. A When the aperture grill is attached, each side portion of the aperture grill to which the springs are welded such that the intervals between the plurality of measurement points of the grille and the plurality of measurement points of the grille facing the panel portion is a predetermined design value. The position is derived based on the calculated height.

Further, according to the present invention, the indexing of each side portion of the aperture grill to which the respective springs are welded,
Adjusting the attitude of the aperture grill based on the height of the plurality of measurement points of the panel unit from the plane including the three pins and the height of the plurality of measurement points of the grill from the plane including the three pin holes, Each of the side portions of the aperture grill to which the respective springs are welded is positioned on the same plane.

Further, according to the present invention, based on heights of a plurality of measurement points of the panel section from a plane including the three pins,
Calculating a symmetrical component twist of the panel portion with respect to a plane including the three pins, and calculating the three pin holes based on heights of a plurality of measurement points of the grille from the plane including the three pin holes. Calculating the torsion of the symmetrical component of the grille with respect to the plane including, and comparing the torsion of the symmetrical components of both the panel portion and the grille, indexing each side portion of the aperture grille for welding the springs. It is determined whether or not is possible.

The present invention also provides an asymmetrical component torsion of the panel portion based on the height of a plurality of measurement points on the panel portion from the plane containing the three pins and based on the plane containing the three pins. And calculating the asymmetric component torsion of the grill based on the plane including the three pin holes based on the heights of the plurality of measurement points on the grill from the plane including the three pin holes. By comparing the asymmetric component torsion of both the panel portion and the grill, it is determined whether or not it is possible to determine each side portion of the aperture grill to which the respective springs are welded.

[0012]

According to the present invention, the positions of a plurality of measuring points on the panel portion with respect to a plane including the positions of three pins attached to the skirt portion of the panel and the positions of the plurality of measuring points on the grill corresponding to the respective measuring points. Is measured, and based on the measurement results of the positions of these measurement points, the side portion of the aperture grill to which the spring is welded is determined, so that when the aperture grill is attached to the panel via the pin and the spring, the panel portion is removed. The welding position of the spring, which can always keep the interval between the spring and the grille at the designed value at any place, is easily and accurately determined.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a description will be given of the configuration of an aperture grill constituting a CRT of the trinitron type and a panel for supporting the aperture grill inside. FIG. 1 shows a perspective view of an aperture grill viewed from the back side.
A frame 101 formed in a substantially rectangular frame shape by upper and lower horizontal members 103 and left and right vertical members 105 connecting both ends of the rear surfaces of the two horizontal members 103, respectively, and the upper and lower horizontal members 103 inside the frame 101. It is composed of a sheet-like grill 107 stretched between the front surfaces, and a number of slits 109 extending vertically are formed in the grill 107 at locations spaced apart in the left-right direction. The horizontal member 103 is formed so as to be curved so that the center portion protrudes forward from the left and right sides, and the lower horizontal member 103 and the left and right vertical members 105 are formed.
Spring holders 111 are welded to the outer surfaces of the spring holders 111, respectively, and a spring 3 for mounting the panel is welded to the outer surface of each spring holder 111. The spring 3 is formed in a rectangular shape in a plan view by an intermediate portion 301, and a base portion 303 and a tip portion 305 extending from both ends of the intermediate portion 301, and the base portion 303 is bent toward the outer surface of the intermediate portion 301. The tip 305 is bent toward the inner surface of the intermediate portion 301, and a pin hole 307 is formed in the tip 305.

FIG. 2 is a perspective view of the panel as viewed from the rear side. The panel 5 has a substantially larger size than the grill 107 and has a substantially rectangular shape curved to correspond to the frame 101. A panel portion 501 and four upper, lower, left and right skirt portions 503 extending rearward from four sides of the panel portion 501 are formed. The inner surfaces of the lower and left and right skirt portions 503 have pin holes 30 of the spring 3.
7, a pin 505 that can be engaged is attached. The aperture grill 1 is attached to the panel 5 by welding the base portion 303 of the spring 3 to a spring holder 111 so that the curved surface of the aperture grill 1 is along the curved surface of the panel portion 501 as shown in FIG. It is carried out by attaching the pin hole 307 of the spring 3 to the pin 505 of the panel 5 so that the aperture grill 1
Are supported inside the panel 5.

Next, a welding position determining method according to the present invention will be described with reference to the flowchart of FIG.
This will be described using a (PPH: panel pin height) measuring device. First, a measurement point Z ₀ substantially at the center of the inner surface of the panel portion 501 with reference to a plane including the three pins 505 of the panel 5.
And four corner side of the height measurement point _Z 1 ~Z _{4 (Z-axis} direction,
(PPH) The position is measured (step S1).

[0016] In measuring the height position of the respective measuring points Z ₀ to Z _4, first, as shown in FIG. 5, disposed at the same height position on the base (not shown) stand horizontally extending Done 3
The panel 5 with the rear end of the skirt portion 503 facing the base is placed on one support 7.

Next, the posture of the panel 5 is adjusted by appropriately raising and lowering the three supports 7 so that the pins 505 of the left and right skirt portions 503 face the pin chucks 901 of the left and right pin chuck devices 9 respectively. The pins 505 of the lower and left and right skirt portions 503 are positioned at the same height from the base. Next, the lower pin chuck device 9 is moved in the left-right direction of the panel by the moving mechanism 11 so that the pin chuck 901 of the lower pin chuck device 9 faces the pin 505 of the lower skirt portion 503. Next, each pin chuck device 9
Is moved closer to each skirt portion 503 by the moving mechanism 11, the pin chuck 901 is engaged with each pin 505 from the inside of the panel 5, and the panel 5 is positioned.
5 is in a state of extending in parallel with the base.

Next, as shown in FIG. 5, the tip of the tracing stylus 1301 of the measuring device 13 is brought into contact with each pin chuck device 9 to measure the position of each pin chuck device 9, and the measurement result is transferred to a personal computer or the like. Is output to control means (not shown) composed of Next, as shown in FIG. 5, five measuring instruments 1 provided at the base locations facing the respective measurement locations Z _{0 to} Z _4.
5, a motor 1701, a ball screw 1703, a lifting guide 1705, and a support plate 1707, as shown in FIG.
It is raised by the elevating mechanism 17 comprised of, respective measuring points Z ₀
To Z ₄ each brought into contact with the measuring element 1501 tip of the measuring instrument 15 to measure the height position of each measurement point _Z 0 to Z ₄ in.
Accordingly, the height position of the measuring point _Z 0 ~Z ₄ (PP
H) The measurement is completed, and the measurement result is output to the control means. As the measuring devices 13 and 15, a magnescale or a micrometer can be used.

The height positions (PP) of the measurement points Z _{0 to} Z ₄
Once measured H), each measuring instrument by the control means on the basis of the measurement result inputted from the 13, 15, the height and the respective measuring points Z ₀ to Z ₄ in the three pins 505 relative to the said base indexing by the height calculation respectively, based on the height indexing, the height of each measurement point Z ₀ to Z ₄ relative to the plane containing the three pins 505, the ideal of each measurement point Z ₀ to Z ₄ The difference from the target height is calculated (step S3). Further, based on the difference between the actual measurement height and the ideal height of each measurement point Z ₀ to Z ₄ of the panel 5, by the control means, the three pins 50
Then, the symmetrical component torsion (F / C) viewed from the plane including the five (5) and the asymmetrical component torsion (TW) from the plane including the three pins 505 are calculated (steps S5 and S7).

Next, facing to the each measuring point _Z 0 to Z ₄ when fitted with the aperture grill 1 in panel 5, measurement points _{Z 11} measurement points _{Z 10} and four corners near the substantially center of the grill 107 surface- measuring the height position of the Z ₁₄ (step S9).

[0021] In measuring the height position of the respective measuring points Z ₁₀ to Z _14, first, as shown in FIG. 7, arranged at the same height position on the base 19 which extends horizontally 3
The aperture grill 1 with the front surface of the grill 107 facing the base 19 is placed on one support 21. Next, as shown in FIG. 7, the measuring device 15 and similarly configured five measuring instrument 23 (not shown) of the lifting mechanism arranged respectively on the base portion facing the respective measuring points Z ₁₀ to Z ₁₄ is raised by, each measurement point Z ₁₀ to Z ₁₄ to the distal end of each contact is allowed each measured point Z of the probe of the measuring device 23 (not shown)
Height of ₁₀ to Z ₁₄ is measured. Accordingly, the height position measurement is finished measurement point Z ₁₀ to Z _14, the measurement result is output to the control means. The measuring device 23
As the measuring devices 13 and 15, a magnescale or a micrometer can be used. In the embodiment, the upper surface of the base 19 corresponds to a reference plane.

After measuring the height positions of the measuring points Z _{10 to} Z ₁₄ , the control means uses the measuring means based on the measurement results input from each measuring device 23 to determine each measuring point based on the base 19. indexing by calculation height of Z ₁₀ to Z ₁₄ each, based on the height indexing, the measured height of each measurement point _Z 10 _{to Z 14} relative to the plane containing the three pin holes 307, each measurement point calculating the difference between the ideal height of the Z ₁₀ to Z ₁₄ (step S11). Further, based on the difference between the actual measurement height and the ideal height of each measurement point Z ₁₀ to Z ₁₄ of the grille 107, the control unit, twist the symmetric element (F /
C) and the asymmetric component torsion (TW) are calculated (steps S13 and S15).

Next, the panel section 501 and the grill 107
The asymmetric component twist (TW) is compared by the control means, and the welding position of the spring 3 is adjusted.
It is determined whether or not the distance between the front surface and the inner surface of the panel section 501 has a relationship that can always be as designed at any location (step S17). If the asymmetric component torsion (TW) between the panel portion 501 and the grill 107 does not have the above-described relationship, before welding the spring 3 to the aperture grill 1, the aperture grill 1
And the panel 5 are excluded from the line, and if the above-mentioned relationship is established, the process proceeds to the next step S19.

In step S19, the panel 501
The control means compares the symmetric component torsion (F / C) of the grill 107 with the symmetric component torsion (F / C) of the grill 107. When the aperture grill 1 is mounted on the panel 5, the surface of the grill 107 and the It is determined whether or not the relationship is such that the interval between the inner surfaces can be set to a desired interval. If the symmetrical component torsion (F / C) between the panel portion 501 and the grill 107 does not have the above-described relationship, as in step S19, before welding the spring 3 to the aperture grill 1, If the panel 5 is excluded from the line and the above relationship is established, the next step S
Move to 21.

In step S21, the lower horizontal member 103
And each spring holder 11 of the left and right vertical members 105
The welding position of the spring 3 to 1 is determined. The welding portion of the spring 3 is determined by the control means by a plane including the difference between the asymmetric component twist (TW), the symmetric component twist (F / C), and the three pins 505 between the panel portion 501 and the grill 107. In accordance with the difference between the height from the measuring points Z _{1 to} Z ₄ and the height from the base 19 to the measuring points Z _{11 to} Z ₁₄ , the control means raises and lowers each support 21 and controls the aperture grill 1. This is done by adjusting the posture of the user.

Thus, with the aperture grill 1 attached to the panel 5, the surface of the grill 107 and the panel 5
The spring 3 welding spots of the spring holders 111 are set at the same height from the base 19 so that the interval between the inner surfaces of the springs 01 can always be as designed at any place.

Once the welding position of the spring 3 has been determined, as shown in FIG. 7, the upper, lower, left and right positioning rollers 25 disposed at the 19 bases outside the aperture grill 1 are used.
, The upper and lower horizontal members 103 and the left and right vertical members 105
And the aperture grill 1 is positioned. Next, the lower horizontal member 103 and the left and right vertical members 10
The pin hole 307 of the spring 3 is engaged with the pin 2701 of the spring holding means 27 provided at each of the 19 positions of the base outside the 5. Next, the pin 2701 of the spring holding means 27 for the lower horizontal member 103 is moved to the panel 5 in the same manner as the pin chuck device 9 is moved when the pin chuck 901 is engaged with the pin 505 of the lower skirt 503. Then, the pin 2701 of each spring holding means 27 is moved horizontally so as to approach the lower horizontal member 103 and the left and right vertical members 105, and the base of the spring 3 is welded to the spring 3 welding location of each spring holder 111. 303, and the spring 3 is welded to the spring holder 111 by a welding machine (not shown) (step S23).

When the springs 3 are welded, the supporting members 21 are lowered to separate them from the aperture grille 1 and the upper, lower, left and right positioning rollers 25 are connected to the upper and lower horizontal members 103.
And releasing the positioning of the aperture grill 1 away from the left and right longitudinal members 105, in this state, each measured from the plane position Z ₁₀ that includes a pin hole 307 of the three springs 3
~Z to ₁₄ Height (PGH: pin grill height) position by a measuring instrument 23 (step S25). When comparing the difference between the actual measurement height and the ideal height of each measurement point Z ₁₀ to Z ₁₄ of the grill 107 in the control unit (step S27), the difference is within a predetermined error range,
If a series of processes is completed and the error range is exceeded, the aperture grill 1 is attached to the panel 5 and the grill 1
The distance between the front surface of the panel 07 and the inner surface of the panel section 501 is measured (step S29), and it is checked whether the distance varies depending on the location or whether the distance is a predetermined distance. If there is no problem in step S29, a series of processes is terminated. If there is a problem, the aperture grill 1 and the panel 5 are excluded from the line as defective.

As described above, according to the embodiment, 3 of panel 5
Panel 501 based on a plane including two pins 505
The height position of the measuring point _Z 1 ~Z ₄ of substantially the center of the measuring point _{Z 0} and the four corners near the inner surface, measuring points _Z 11 of substantially the center of the measuring point _{Z 10} and four corner side of the grill 107 surface ~Z
₁₄ of the height position is measured, and the difference between the measured height and the ideal height of the measurement is calculated from these positions _{Z 0 ~Z 4, Z 10 ~Z} 14, the plane containing the three pin holes 307 from to the measurement point _{Z 0} of the panel portion 501 height (F / C)
If, from the base 19 to the measuring point _{Z 10} Height (F / C)
The welding position of the spring 3 to each spring holder 111 of the lower horizontal member 103 and the left and right vertical members 105 is determined based on the asymmetrical component twist (TW) of the panel portion 501 and the grill 107.

For this reason, even if the position of the pin 505 with respect to the inner surface of the panel portion 501 is shifted or the grill 107 of the aperture grill 1 is twisted, the surface of the grill 107 and the inner surface of the panel portion 501 may be twisted. Of the spring 3 of each spring holder 111 can be easily and accurately determined so that the distance between the springs 3 can be kept constant at any place. Therefore, the panel after the mounting of the aperture grill 1 on the panel 5 can be inspected. 5 and the aperture grille 1 can both reduce the rate of being determined to be defective and improve the yield.

Further, from the plane containing the three pin holes 307 to the measuring position _{Z 0} of the panel portion 501 height (F / C) position and, from the base 19 to the measuring point _{Z 10} Height (F /
C) The welding position is determined based on the position or the welding position is determined based on the asymmetrical component torsion (TW) of the panel portion 501 and the grill 107. Therefore, when a suitable welding position of the spring 3 cannot be determined. , Each spring holder 1
Before the spring 3 is welded to the aperture 11, the aperture grill 1 and the panel 5 can be removed from the line, and can be reused in combination with another aperture grill 1 or the panel 5, and the yield of the aperture grill 1 and the panel 5 can be improved. Can be improved.

In carrying out the method of the present invention, the structure of the means for positioning the panel 5 and the aperture grill 1 is not limited to the pin chuck device 9 and the positioning roller 25 shown in the embodiment, and is arbitrary. Panel unit 50
The means for measuring the respective positions of the inner surface of the device 1, the pin 505 and the surface of the grill 107 are the measuring devices 13 and 1 shown in the embodiment.
It is not limited to 5, 23, and is arbitrary. Further, the configuration of the means for adjusting the positions of the panel 5 and the aperture grill 1 is as follows.
The present invention is not limited to the three supports 21 shown in the embodiment, but includes, for example, a plurality of articulated arms and a chuck provided at the tip of each articulated arm and holding an appropriate portion of the panel 5 and the aperture grill 1. Optional. The panel unit 5
01 and the position measurement of the measurement point _Z 0 to Z ₄ of the inner surface, the grill 1
Localization of 07 the surface of the measuring point Z ₁₀ to Z _14, as shown in the embodiment, a state where the rear end of the panel 5 toward the base side, and towards the front of the grill 107 to the base 19 side Instead of the state, the operation may be performed with the panel 5 and the aperture grill 1 turned in the opposite direction. Furthermore, in the embodiment, five respective surfaces of the inner and grill 107 of the panel unit 501 measuring points _Z 0 _{to Z 4,} it is configured to measure the position of the Z 10 _{to Z 14,} the panel portion 501 and the grill 107 The number of measurement points is not limited to five, and the position of the measurement point is not limited to the position shown in the embodiment, but is arbitrary.

In the embodiment, the pins 505 of the panel 5
Although the case where the number of the springs 3 welded to the aperture grille 1 is three has been described, the number of pins 505 of the panel 5 and the number of the springs 3 welded to the aperture grille 1 are four, respectively. It is also applicable when there is one. In this case, the measurement of five height position of the measurement point Z ₀ to Z ₄ of the inner surface of the panel portion 501 has engaged the pin chuck 901 of the pin chuck device 9 to the pin 505 of the lower and right and left skirt portions 503 Thereafter, the pin chuck of the pin chuck device (not shown) for the upper skirt portion 503 is moved by the moving mechanism in the vertical direction of the base and the left and right direction of the panel 5 so as to reach the pin 505 of the upper skirt portion 503. Then, the pin chuck is moved to the pin 50.
5 is performed.

When the number of the pins 505 and the number of the springs 3 are four, the welding position of the spring 3 for the upper horizontal member 103 is determined as follows.
First, three pins 50 of the lower and left and right skirt portions 503
5 of the upper skirt portion 503 with respect to the plane including
The height of the pin hole 307 of the spring 3 of the upper horizontal member 103 with respect to the plane including the pin hole 307 of the spring 3 of the lower horizontal member 103 and the left and right vertical members 105 is determined based on the height of the upper horizontal member 103. Next, a spring holding means (not shown) for the upper lateral member 103 movable in a three-dimensional direction is provided with a pin chuck device for the upper skirt 503 when the pin chuck is engaged with the pin 505 of the upper skirt 503. The pins of the spring holding means are moved horizontally so as to approach the upper horizontal member 103 in the same manner as in the movement of the upper and lower members, respectively. As a result, the spring 3 of the upper horizontal member 103 is indexed to the welding position.

[0035]

As described above, according to the present invention, there are provided a panel portion and four upper, lower, left, and right skirt portions extending from four sides of the panel portion, and at least three of the four skirt portions are provided. A pin mounted with an aperture grille on one of the skirt portions, and a panel mounted on a base on which a welding machine is installed so that the heights to the mounting positions of the three pins are the same. Arranged inside the panel,
At least three of the four sides facing each skirt
A panel mounting spring having a pin hole engageable with the pin is welded to one of the side portions, and a color identification grill arranged to face the panel portion is stretched inside the four side portions. In the color cathode ray tube having the aperture grille, when welding the spring to the side of the aperture grille, measure the height from the base to the mounting position of the three pins with respect to the base. Then, by measuring the height of the plurality of measurement points of the panel section, the height of the plurality of measurement points of the panel section is measured from the plane including the three pins with reference to the plane including the three pins. When calculating the aperture grill of the plurality of measurement points of the grill facing each measurement point of the panel portion when the aperture grill is attached to the panel via the pin and the spring,
By measuring the height from the base with respect to the base, the three bases with respect to the plane including the three pin holes located at the same height as the pin when engaged with the pin are measured. The height of the plurality of measurement points of the grille is calculated from the plane including the pin hole, and when the aperture grill is attached to the panel via the pins and the spring, the heights of the plurality of measurement points are opposed to the plurality of measurement points of the panel portion. Each side portion of the aperture grill to which the respective springs are welded is derived based on the calculated height so that the interval between the plurality of measurement points of the grill becomes a predetermined design value.

For this reason, even if the position of the pin with respect to the inner surface of the panel portion is shifted or the grill is twisted, the gap between the grill and the panel is always set to the design value at any place. Can easily and accurately determine the location of the aperture grille that can be welded, thus reducing the rate at which both the panel and the aperture grille are rejected during post-installation inspection of the aperture grille to the panel. Thus, the product yield can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an aperture grill to which the present invention is applied as viewed from the back side.

FIG. 2 is a perspective view of a panel to which the aperture grill of FIG. 1 is attached, as viewed from the back side.

FIG. 3 is a perspective view showing a state in which an aperture grill is attached to a panel.

FIG. 4 is a flowchart showing steps of a method for determining a welding position according to the embodiment.

FIG. 5 is a perspective view showing a schematic configuration of a support and a pin chuck device.

FIG. 6 is a perspective view showing a schematic configuration of a measuring instrument.

FIG. 7 is a plan view of a base.

[Explanation of symbols]

1 aperture grill, 103 horizontal members,
105 vertical members, 107 grills, 111
Spring holder, 3 springs, 5 panels, 501 panels, 503 skirts
, 505 pins, 15,23 Measuring device, 19
Base, 21 _{support, Z 0 ~Z 4, Z 10} ~
Z ₁₄ measurement points

Claims (4)

(57) [Claims] 1. A panel, and four upper, lower, left and right skirts extending from four sides of the panel, and at least three of the four skirts are provided with pins for mounting an aperture grille. Attached and welded
Height of the three pins on the installed base
And a pin hole disposed on the inside of the panel and at least three of four sides facing the respective skirts, the pin holes being engageable with the pins. A color cathode ray tube comprising: a panel mounting spring welded to the panel unit; and a color identification grill disposed facing the panel unit, the aperture grille being extended inside the four sides. When the spring is welded to the side of the base, the three pins are removed from the base with respect to the base.
Measure the height to the landing position and measure the panel
By measuring the height of the location, the three pins are included.
From the plane containing the three pins with respect to the plane
Calculate the height of a plurality of measurement points on the panel section, and connect the aperture grill through the pins and springs.
Each measurement point on the panel when attached to the panel
With reference to the base of a plurality of measurement points of the grill facing the
By measuring the height from the base,
Before engaging with the pin and at the same height as said pin
The three pins based on a plane including the three pin holes.
The height of the measurement points of the grille from the plane containing the holes
Calculated, and the aperture is attached to the panel via the pin and the spring.
When the grill is installed, the multiple
The distance between a plurality of measurement points of the grill facing the measurement points
Weld each of the above springs so that
Calculated each side part of the aperture grille
A method for determining a spring welding portion of an aperture grill, which is derived based on a height . 2. The indexing of each side portion of the aperture grill to which the respective springs are welded is performed by the three pins.
And the height of a plurality of measurement points of the panel portion from a plane including
A plurality of measurements of the grill are made from a plane including the three pin holes.
2. The aperture grill according to claim 1, wherein the position of the aperture grill is adjusted based on the height of a fixed portion, and each side portion of the aperture grill to which the respective springs are welded is positioned on the same plane. Spring welding location index method. 3. A symmetrical component torsion of the panel portion with respect to a plane including the three pins is calculated based on a height of a plurality of measurement points of the panel portion from a plane including the three pins.
And, a plurality of the grill from a plane including the three pin holes
Plane including the three pin holes based on the height of the measurement point
By calculating the torsion of the symmetrical component of the grill based on the reference, and comparing the torsion of the symmetrical components of both the panel portion and the grille, it is possible to determine each side portion of the aperture grille for welding the springs. The method according to claim 1 or 2, wherein whether or not there is a spring welding portion is determined. 4. An asymmetric component torsion of the panel portion based on the height of a plurality of measurement points of the panel portion from the plane including the three pins and based on the plane including the three pins.
Out, double of the grill from a plane including the three pin holes
Based on the height of the number measurement points, calculate the asymmetry component torsion of the grille with respect to the plane including the three pin holes, and compare the asymmetry component torsion of both the panel portion and the grille.
The method according to claim 1, 2 or 3, wherein it is determined whether or not it is possible to determine each side portion of the aperture grill to which the respective springs are welded. .