JP2000247652A - Yoke molding device for glass funnel for TV - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally formed a glass funnel for TVs having a plurality of yokes. SOLUTION: This device comprises a positioning mechanism which has an aperture end face to be sealed with a panel on one side of the funnel body and is fixed with a funnel base material 11 having bulging parts 116 on the other side of the funnel body and a yoke molding mechanism 43 which forms the yokes by molding the bulging parts 116 held heated and softened at the fixed funnel base material 111.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass funnel for a TV which can be suitably used for forming a funnel for a cathode ray tube having a plurality of yokes necessary for separately welding a plurality of neck tubes. A yoke molding apparatus.

[0002]

2. Description of the Related Art In recent years, in the field of cathode ray tubes such as color picture tubes for televisions, the demand for high-resolution cathode ray tubes capable of responding to high-definition broadcasting and large screens has been increased. Accordingly, various technical studies have been made to meet these demands.

As a part of this, a technology has been already developed in which a plurality of independent small cathode ray tubes are arranged so that a large screen with excellent resolution can be displayed (for example, Japanese Utility Model Application Laid-Open No. 53-117130). etc). However, this type of prior art is effective for outdoor display for displaying a huge screen with a large number of divisions, but for example, when the screen size is 4
Even if the method is applied to a medium-sized screen of about 0 inches, there is a problem that the presence of the joint formed between the respective divided areas is too conspicuous, and the reproduced screen is difficult to see.

On the other hand, as a device capable of solving the above-mentioned disadvantages, a device in which a plurality of independent cathode ray tubes are integrated to form a single screen as a whole has already been proposed (for example, Japanese Patent Application Laid-Open No. H10-157572). Japanese Patent Publication No. 50-17167, etc.). In this case, the conventional technique includes a front panel portion on which a phosphor screen is formed, a rear panel portion provided so as to face the front panel portion, and a plurality of pieces fused to the rear panel portion. And the plurality of neck portions fused to each of the funnel portions constitute the whole. For this reason, it is necessary to separately seal the electron gun afterwards for a plurality of neck portions, and the fusion work at that time is extremely difficult due to the narrow interval between the neck portions. There was a problem that would be difficult.

FIG. 6 shows an example of a conventional method capable of solving such a technical problem. A plurality of necks, in which an electron gun is sealed in advance, are joined to a funnel to attach a neck. After forming the funnel 3 or joining a plurality of necks to the funnel, the electron gun is sealed in the neck to form a funnel 3 with a neck. After joining separately, the back panel 2 and the front panel 1 are integrated to form an envelope (Japanese Patent Laid-Open No. 4-2940).
No. 30).

FIG. 7 shows another example of a conventional method capable of solving the same technical problem as described above. In this case, a funnel section having a neck section 8 in which an electron gun 9 is sealed is shown. 7 is integrally joined to the front panel portion 5 with the intermediate glass portion 6 interposed therebetween to form an envelope (see JP-A-7-45215).

[0007]

However, in each of the conventional examples shown in FIGS. 6 and 7, each of the funnels 3 with a neck or the funnel 6 is positioned at a predetermined position on the back panel 2 or the intermediate glass 6. In addition, they are individually fused and integrated afterward, and this not only increases the number of steps for manufacturing the same, but also complicates the operation.

Further, it is very difficult to simultaneously press-mold such a funnel having a plurality of necks at one place using a mold. That is, the mold and the glass are cracked due to the difference in expansion allowance in the heat process (temperature rising / cooling process), and it is extremely difficult to remove the mold even if it does not crack, so that productivity is greatly impaired. There was a problem.

SUMMARY OF THE INVENTION In view of the above-mentioned problems encountered in the prior art, the present invention relates to a method of integrally forming a funnel for a cathode ray tube having a yoke necessary for forming a neck portion to which a plurality of neck tubes are individually welded. TV that can be suitably used for
It is an object of the present invention to provide a yoke molding apparatus for a glass funnel for use.

[0010]

SUMMARY OF THE INVENTION The present invention has achieved the above-mentioned object, and has a structural feature that a substantially rectangular opening end face to which a panel is sealed is provided on one side of a funnel body. A funnel substrate for a cathode ray tube having a plurality of bulges at a position where the neck tube on the other side of the open end face of the funnel body is sealed is positioned with the open end face side upward or downward. And a yoke molding mechanism that forms the yoke by molding the bulging portion in a heated and softened state in the funnel substrate that is stationary via the positioning mechanism, and The positioning mechanism is a supporting means for supporting the funnel base material on the lower surface side, and a position in a horizontal plane direction with at least three reference points provided on two surfaces of the outer wall adjacent to the opening end surface as fulcrums. Side to fix And e means, among the four corners of the opening end face, a fixed support point for one of the two opposing corners,
And upper support means for supporting the upper surface side of the funnel base material via the floating support point with respect to the other two opposite corners, wherein the yoke molding mechanism is provided inside the bulging portion of the fixed funnel base material. The male means arranged directly opposite and the female means arranged directly outside the bulging portion of the funnel substrate are arranged so as to freely move up and down relative to each other. It is in.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a principal part showing an example of a yoke molding apparatus for a glass funnel for a TV according to the present invention in a longitudinal sectional direction, and shows a funnel substrate 1 for a cathode ray tube.
11 for positioning the positioning mechanism 11 and the positioning mechanism 1
The yoke molding mechanism 43 for forming the yoke 119 as shown in FIG.
The whole is composed. The yoke molding device 11
As shown in detail in FIG. 3, for example, a funnel substrate 111 to which is applied a substantially rectangular opening end surface 114 to which a panel (not shown) is sealed is provided on one side of the funnel main body 112. As shown in FIG. 2, for example, two bulging portions 1 protruding separately are used for forming two neck portions.
16 is formed on the back side, which is the other side of the funnel body 112.

First, the positioning mechanism 1 in which the funnel substrate 111 is fixed with the opening end surface 114 side positioned on the upper surface.
2 will be described. The support means 14 with the support 16 for supporting the funnel base material 111 on the lower surface side, and the two side surfaces 12 of the outer wall 120 adjacent to the opening end surface 114 are provided.
Lateral support means 24 for fixing the position in the horizontal direction with at least three positioning reference points 117 provided at 0a, 120b as fulcrums, and four corners 114 of the opening end face 114.
a to 114d, one of two opposite corners 114a, 114
c, the fixed support points P ₁ and P ₂ and the other two opposite corners 1
The upper support means 34 is configured to press and support from the upper surface side via the floating support points P ₃ and P ₄ with respect to 14b and 114d.

Of these, the support means 14 is provided in the main body 1 of the apparatus.
A support portion 14 erected at an appropriate length on the base 18 of the second,
An abutment 16 having a ball seating surface 17 disposed on the top end side of the support portion 15 so as to freely swing in the plane direction is formed. As a result, the funnel base material 111
The flat portion 118 located between the 6, 6 and 16 is mounted on the ball seating surface 17, and is supported at one point on its lower surface side by freely swinging in the surface direction.

The lateral support means 24 is provided with the lower support means 14.
The funnel substrate 111 supported by
As can be seen from the plan view of FIG. 1, a horizontal support portion 25 disposed at an appropriate position of the apparatus main body 12 so as to abut and support each reference point 117 from the orthogonal direction individually, The other two side surfaces 120c of the outer wall 120 that do not abut,
Piston part 26 arranged to be able to move forward and backward from the 120d direction
a, 27a, and the horizontal pressing portions 26, 2 for pressing separately via
7 are formed. Thereby, the funnel substrate 1
11 is supported in a state where the position in the horizontal plane direction is fixed.

Further, the upper support means 34 is provided on the opening end face 11.
4, a fixed support arm 35 fixedly in contact with and supports one of the two opposite corners 114a, 114c of the four corners 114a to 114d, and is positioned below the fixed support arm 35. The other two opposing corners 114b and 114d are brought into floating contact with each other, and are combined with a floating side arm 37 that supports the two corners 114b and 114d.
Specifically, a component member (specifically, a male member to be described later) that is disposed above the yoke forming mechanism 43 at each central portion where the fixed-side arm portion 35 and the floating-side arm portion 37 intersect. For example, annular connecting portions 36 and 38 which can secure a space 42 necessary for disposing the means 44) are provided.

The floating arm 37 is fixed to the fixed arm by interposing a plurality of spring members 41 such as a compression coil spring between the annular connecting portions 36 and 37 facing each other. It is formed so as to be freely floating and connected to 35. Thereby, the four corners 114a of the opening end face 114
To 114d, two opposing corners 114a, 114c
Fixed support points P ₁ , P ₂ with respect to the other two opposite corners 11
The funnel substrate 111 can be supported by being pressed from the upper surface side via the floating support points P ₃ and P ₄ with respect to 4b and 114d. Note that the fixed support point P ₂ positioned at one end 35a of the stationary support arm portion 35, the floating-side support arm portion 37
The a floating support point P ₄ located at one end 37a of,
If necessary, a height adjuster 39 having an appropriate adjustment mechanism such as finely adjusting the height between the funnel base 111 and the opening end surface 114 by operating the operation screw 40 is provided. Is desirable. Note that the four corners of the opening end surface 114 refer to a region defined by a long axis and a short axis without being limited thereto, although a diagonal corner is preferable as a reference plane in terms of flatness or the like.

On the other hand, the yoke molding mechanism 43 has a male means 44 disposed directly inside the bulging portion 116 of the fixed funnel base material 111 and a yoke forming mechanism 43 provided outside the bulging portion 116 of the funnel base material 111. The female means 54 arranged opposite to the other is formed so as to freely move up and down relative to each other.

Among them, the male means 44 is capable of freely controlling the two male units 47 separately facing and simultaneously facing the two bulging portions 116 of the funnel substrate 111 at a time. It is arranged as. That is, the male means 44 comprises a cylinder 45 controlled to be lifted and lowered, a flange 46 attached to a tip 45 a of the cylinder 45, and two sets of male units 4 attached to the flange 46.
7 are formed. The male unit 4
Reference numeral 7 denotes a support rod 49 which is arranged to freely move in the direction of the arrow with respect to the guide rail 48 via a step motor (not shown), and a chuck 50 attached to the support 49. And a male main body 51 which is detachably provided via the chuck portion 50. In the illustrated example, the male means 44 is shown in which the two male units 47 can be lifted and lowered collectively, but the individual male units 47 can be lifted and lowered independently. May be done. Further, the support rod portion 49 in the male unit 47 can be freely arranged not only in the direction of the arrow but also in the front-rear direction.

On the other hand, the female means 54 is constituted by two sets of female units 55 arranged independently. In this case, each of the female units 55 includes a cylinder 56 provided with a vent hole 57 so as to be movable up and down, a chuck portion 58 attached to the top end of the cylinder 56, And a female mold body 59 disposed at the same position. In addition, an air vent hole 60 is provided at the bottom of the female main body 59 to allow the ventilation hole 57 to communicate with the inside of the female main body 59. In the above-described embodiment, the case where the opening end face of the funnel body is molded upward is described. However, if the molding apparatus is reversed, molding can be performed with the opening end face downward. In that case, the funnel substrate is supported by the support means on the inside.

Next, the operation of the present invention will be described together with its effects.
And the opening end surface 114 is positioned with the side of the opening end surface 114 positioned on the upper surface.

That is, in the funnel base material 111, first, the flat portion 118 located between the bulging portions 16, 16 is placed on the ball seating surface 17, and the lower surface side can freely swing in the surface direction. And is supported at one point by the support means 14.

Next, the funnel base material 111 abuts the horizontal support 25 individually on each reference point 117 from the orthogonal direction, and the outer wall 120 to which the horizontal support 25 does not abut.
Piston part 2 in the direction of the other two side surfaces 120c and 120d.
By being pressed by the horizontal pressing portions 26 and 27 via 6a and 27a, the position in the horizontal plane direction is fixed and is supported by the lateral support means 24.

After the funnel substrate 111 is thus supported by the lower support means 14 and the lateral support means 24, it is fixed to one of two opposing corners 114a, 114c of the four corners 114a to 114d of the opening end face 114. The fixed support points P ₁ and P ₂ of the side support arm 35 are
The b and 114d are supported by the upper support means 34 in a state where the floating support points P ₃ and P ₄ of the floating support arm 37 are pressed from the upper surface side, respectively. The operation at this time will be described in more detail.
1, the floating end portion 1 of the funnel base member 111 is connected to the fixed-side support arm portion 35 so as to be free to float.
First, the floating support points P ₃ and P ₄ abut against the _four opposing corners 114b and 114d. When the upper support means 34 is further pressed relatively in this state, the fixed support points P ₁ and P ₂ eventually come into contact with the _two opposing corners 114 a and 114 c while resisting the elastic force of the spring material 41. Reach. Thus, the opening end face 114 of the funnel base 111 will be reliably supported at four points with its fixed support point at the four corners 114a to 114d P _1, P ₂ and floating support points P _3, P ₄ . In the case where the fixed-side support arm 35 and the floating-side support arm 37 include the height adjuster 39, the funnel substrate 1
Fine adjustment of the contact height of the ellipse 11 to the opening end surface 114 can make the positioning more preferable. If it is necessary to make further fine adjustments after the positioning, once the supporting state of the lateral support means 24 and the upper support means 34 with respect to the funnel substrate 111 is loosened, After making necessary corrections while finely adjusting the support means 34, the support means 34 can be re-supported to hold the correct position.

After the funnel substrate 111 is fixed through the positioning mechanism 13, the male means 44 disposed directly inside the bulging portion 116 and the bulging portion 116
The yoke 119 as shown in FIG. 4 is formed by subjecting the bulging portion 116 to yoke molding via the yoke molding mechanism 43 composed of the female mold means 54 disposed facing the outside.

That is, first, the bulging portion 116 of the funnel base material 111 is partially heated to a temperature suitable for yoke molding by using an appropriate heating device to be softened. In this state, each female unit 55 is operated and arranged so that the female body 59 is located directly below each bulging portion 116.

Next, using the space 42 provided in the upper support means 34, the male means 44 disposed above the bulging portion 116 are moved so that each male main body 51 is directly connected to each of the bulging portions 116. The position is adjusted while moving the supporting rod portion 49 via the guide rail portion 48 so as to face it.

After the above-described position adjustment is completed, the cylinder 45 is lowered, and the male body 51 is pressed against the bulging portions 116 facing each other. And molded simultaneously. As a result, a yoke 119 defined by the male body 51 and the female body 59 and formed into a predetermined shape is formed.

After completing the above molding operation, the cylinder 45
Is raised to retract the male body 51 from inside the bulging portion 116, and the female body 59 is lowered to complete the molding operation.

After the above-described series of forming operations is completed, the lower support means 14, the lateral support means 24, and the upper support means 34 constituting the positioning mechanism 13 are supported in the required order. By releasing, the funnel base material 111 formed as shown in FIG. 4 can be taken out and carried out to a subsequent process.

In this case, the funnel substrate 111 after molding
The yoke 11 is positioned in the direction of the tube axis X after being accurately positioned.
9, the electron gun (not shown) can be accurately positioned and sealed in the neck tube 123 even when the neck tube 123 is welded to obtain the necked funnel 121 shown in FIG. It is desirable that the tube axis X coincides with the center of the yoke on the reference line R of the yoke portion 119 (a virtual reference line perpendicular to the tube axis of the funnel yoke portion).

In the above, the case where the apparatus of the present invention is applied to the funnel substrate 111 having two bulging portions 116 has been described. The number of mold bodies and the number of female mold bodies of the female mold means are also prepared so as to correspond to the number of bulging portions.

[0032]

As described above, according to the present invention, a positioning mechanism is provided for a funnel base material used when integrally forming a plurality of neck portions capable of restricting and sealing the position of an electron gun in a funnel body. Can be accurately positioned and fixed via the.

Therefore, the yoke forming operation performed on the bulge portion of the funnel base material via the yoke forming mechanism is performed while ensuring that the pipe axis extending in the direction orthogonal to the reference line passes through the center of the yoke. It can be performed efficiently.

In addition, by using the apparatus of the present invention, a plurality of yokes can be formed in a state where they are accurately positioned, so that a neck tube is welded to a neck portion formed from the yokes. By using a funnel, a cathode ray tube can be manufactured efficiently and with high quality.

Further, according to the present invention, since a plurality of yokes can be formed integrally with the funnel main body, the work of fusing individual necked funnel members separately prepared as in the prior art can be performed. Not only can it be unnecessary, but also the number of steps can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main part showing an example of the present invention in a longitudinal sectional direction.

FIG. 2 is a plan view illustrating the arrangement relationship between a positioning mechanism and a funnel substrate according to the present invention.

FIG. 3 is a longitudinal sectional view showing an example of a funnel substrate formed by using the apparatus of the present invention.

FIG. 4 is a longitudinal sectional view showing an example after the funnel substrate shown in FIG. 3 is molded using the apparatus of the present invention.

FIG. 5 is a longitudinal sectional view showing one example of a necked funnel obtained by using the funnel substrate shown in FIG. 3;

FIG. 6 is a longitudinal sectional view showing a first conventional example of a cathode ray tube having a plurality of necks.

FIG. 7 is a longitudinal sectional view showing a second conventional example of a cathode ray tube having a plurality of necks.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Yoke molding apparatus 12 Device main body 13 Positioning mechanism 14 Lower support means 15 Support part 16 Abutment part 17 Ball bearing surface 18 Base 24 Lateral support means 25 Horizontal support parts 26 and 27 Horizontal pressing parts 26a and 27a Piston part 34 Upper support means 35 Fixed-side support arm 35a End 36 Annular connecting part 37 Floating-side arm 37a End 38 Annular connecting part 39 Height adjuster 40 Operating screw 41 Spring material 42 Space 43 Yoke forming mechanism 44 Male means 45 Cylinder 45a Tip part 46 Flange part 47 Male unit 48 Guide rail part 49 Supporting rod part 50 Chuck part 51 Male body 54 Female means 55 Female unit 56 Cylinder 57 Vent hole 58 Chuck part 59 Female body 59a One side female Mold part 59b Other side female mold part 60 Air vent hole 111 Funnel base material 112 Funnel Body 114 opening end face 114a~114d corners 116 bulged portion 117 reference point 118 flats 119 yoke 120 outside walls 120a, 120b sides 120c, 120d side 121 necked funnel 123 Neck tube X tube axis R reference line P _1, P ₂ fixed Support point P ₃ , P ₄ Floating support point

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Junya Morishita 1-10-1 Kitahonmachi, Funabashi-shi, Chiba F-term in Asahi Glass Co., Ltd. (reference) 5C032 BB10 BB11

Claims (3)

[Claims] 1. A funnel body having a substantially rectangular opening end face to which a panel is sealed, and a plurality of openings at a location for sealing a neck tube on the other side of the opening end face of the funnel body. A positioning mechanism for positioning a funnel base material for a cathode ray tube having a bulging portion with the side of the opening end face upward or downward; and a heating mechanism for positioning the funnel base material via the positioning mechanism. A yoke molding mechanism that forms the yoke by molding the bulging portion in a softened state, wherein the positioning mechanism is a lower support unit that supports a funnel base material on a lower surface side, and a vicinity of the opening end surface. Lateral support means for fixing a position in the horizontal plane direction with at least three reference points provided on two surfaces of the outer wall adjacent to each other as a fulcrum, and one of the four corners of the opening end surface with respect to one of two opposite corners. Fixed support And a supporting means for supporting the upper surface side of the funnel base material via a floating support point with respect to the other two opposite corners, wherein the yoke molding mechanism is provided with the bulging portion of the fixed funnel base material. The male means arranged facing directly inside the female means and the female means arranged facing the outside of the bulging portion of the funnel substrate are formed so as to freely move up and down relative to each other. TV characterized by being arranged
Glass funnel yoke molding equipment. 2. The positioning device according to claim 1, wherein the upper support means comprises a fixed support point and a floating support point for finely adjusting the height between the funnel base and the opening end face. The yoke molding apparatus for a glass funnel for a TV according to claim 1, further comprising a height adjusting tool separately provided. 3. The male means and the female means constituting the yoke forming mechanism are provided at predetermined positions with respect to the lateral support means, and the male means is provided with a respective one of the bulges of the funnel base material. 3. A yoke molding apparatus for a TV glass funnel according to claim 1 or 2, wherein a plurality of male units, each of which is individually opposed to each other at the same time, are collectively arranged so as to be freely liftable and lowered.