KR100322446B1 - Apparatus for fabricating cathode ray tube - Google Patents

Abstract

PURPOSE: An apparatus for fabricating a cathode ray tube is provided to hold and shift an exhaust tube without using an additional wedge by improving a structure of a clamping portion. CONSTITUTION: A holder(4) is used for holding a bulb(2). A holder receiver(6) is used for supporting the holder(4) in order to maintain stably a position of the bulb(2). The holder receiver(6) includes a fixing member(6a) and a rotary member(6b). The fixing member(6a) is fixed by a support member(8). The rotary member(6b) is rotated by a driving unit(10). The driving unit(10) is installed on the fixing member(6a). The driving unit(10) is combined with the rotary member(6b) through a gear(12). An electron gun(16) is located at the inside of the neck portion(14) of the bulb(2). A stem(18) is installed on the electron gun(16). The stem(18) is practically located at a spindle(22). The spindle(22) is driven by a driving portion(20).

Description

Cathode Ray Tube Manufacturing Equipment

The present invention relates to an apparatus for manufacturing a cathode ray tube, and more particularly, in the process of fusing the stem with the electron gun inserted into the bulb and emitting the electron beam to the bulb, pressurizing the stem to the bulb side and then again in the opposite direction. An apparatus for manufacturing a cathode ray tube for clamping an exhaust pipe attached to a stem for movement.

In general manufacturing process of cathode ray tube, the panel coated with phosphor on the inner surface is fused with funnel with shadow mask installed, and after the stem with electron gun emitting electron beam is fused to the neck part connected to the funnel, And a step of evacuating the inside of the pipe through an exhaust pipe attached to the stem and in communication with the funnel side.

In the above process, the stem is heated in the process of fusion of the stem to the neck portion, and then contacted with the neck portion, and the melted and fused at the same time while rotating them. The stem is pulled in the opposite direction to straighten the fusion site.

The reason for such a straightening process is that when the stem is pressed to the neck side, a phenomenon in which the molten portion swells to the outside or the inside of the neck due to the pressing force appears, so it is necessary to straighten the swollen portion.

If the bulging part of the neck is not straightened, if the bulging part is in the inner part of the neck, a crack may be formed in the welded part due to the strong adhesive force while the protruding part contacts the bulge part to support the stem pin in the stem. There is a problem that occurs.

In the case where a part occurs outside the neck, the outer diameter of the neck increases substantially at the part, making it difficult to install a color-purifying magnet or a deflection unit mounted through the neck.

Therefore, when the stem is fused to the neck portion, the stem should be pulled straight to straighten the bulging portion of the neck portion. At this time, it is generally known to clamp and pull the stem pin installed on the stem to move the stem.

However, this method requires pulling at least two stem pins, in which case the clamping force of the stem pins varies from stem pin to pin, so that a satisfactory effect in straightening the neck portion is not obtained.

Meanwhile, a technique for holding and pulling an exhaust pipe formed in the stem without clamping and pulling the stem pin is disclosed in US Pat. No. 4,798,552. However, the device disclosed in this patent has a structural problem in that a separate wedge means must be used to open or pinch a pair of members for holding the exhaust pipe as needed.

In order to solve the problems of the prior art as described above of the present invention, an object of the present invention is to provide an apparatus for manufacturing a cathode ray tube that can hold and move the exhaust pipe without using a separate wedge means.

In order to realize the object of the present invention as described above, the bulb holding means for supporting the bulb having a panel of the inner surface of the fluorescent surface rotatably in the circumferential direction; Drive means for holding the stem fused to the neck portion of the bulb held by the holding means to displace in the vertical and circumferential directions; It provides a cathode ray tube manufacturing apparatus comprising a means for clamping or releasing a clamp formed exhaust pipe integrally with the stem.

The means for clamping or releasing the clamp may include a clamp region consisting of a clamp member and a base arranged to have a smaller gap than the outer diameter of the exhaust pipe, and a clamp release provided to have a distance greater than the outer diameter of the exhaust pipe within the clamp area. Proposes a cathode ray tube manufacturing apparatus including a region

1 is a schematic view of a manufacturing apparatus according to the present invention.

Figure 2 is a partial cutaway view of the neck spindle of the manufacturing apparatus according to the present invention.

3 is a half sectional view of a clamp according to the present invention;

4 is a view for explaining the action of the clamp according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a manufacturing apparatus according to the present invention, in which a bulb 2 is held by a holder 4, which holder is supported by a holder receiver 6 to hold the bulb 2 in a stable posture. to be.

The bulb has a panel coated with phosphor on its inner side and a funnel fused to the panel and fused with a stem on which an electron gun is mounted.

The holder receiver 6 has a structure including a fixing member 6a having a position fixed by the supporting member 8 and a rotating member 6b that is rotatably disposed at the center of the outer member.

In order for the rotating member 6b to be rotated by the driving unit 10 provided on the fixing member 6a, the driving unit is gear-coupled with the rotating member 6b via the gear 12. .

The electron gun 16 positioned inside the neck portion 14 of the bulb 2 should be able to rotate in the circumferential direction or move in the vertical direction when the stem 18 mounted on the electron gun is fused with the neck portion. The drive means 20 like a motor is arrange | positioned in line with the axis of a bulb. The stem is located on the spindle 22 which is substantially rotated and linearly moved by the drive means 20.

In the present invention, after the stem is fused to the neck portion in the general cathode ray tube manufacturing apparatus as described above, the process of pulling the stem downward to straighten these fusion sites, wherein the clamped pull the exhaust pipe formed integrally to the stem To make it possible.

Spindle 22 provided by the present invention, as shown in Figure 2a has a hollow structure with a hollow inside, the chucking portion 24 is fixed to the drive means 20, and the stem 18 described above The stem mounting part 26 in which this position is located, and the insertion part 30 in which the clamping member 28 which clamps the exhaust pipe E formed integrally in the stem are located.

As shown in FIG. 2B, the insertion portion 30 includes a portion 32 into which the exhaust pipe E is inserted, and a portion 32 integral with the body of the spindle, and an opening 34 in which such portion does not exist. .

The opening 34 is provided to allow the clamp member 28 to clamp the outer circumference of the exhaust pipe E while the exhaust pipe E is located.

The clamp member 28 forms a clamping means together with the base 36 and the support member 38 fixed to the base.

The above-mentioned clamping means forms grooves 40 and 42 at the same curvature as the outer circumferential curvature of the exhaust pipe in the clamping member 28 and the base 36, respectively, in order to increase the outer circumference and contact surface foot of the exhaust pipe E.

The outer diameter of the grooves 40 and 42 is larger than the outer diameter of the exhaust pipe E so that the clamp member is configured not to clamp in the state where the exhaust pipe is located at this portion.

The support member 38 has a spacer 44 for floating a predetermined distance in contact with the base 36, and has a rod 46 into which the clamp member 28 is fitted.

The rod 46 has one end fixed to the support member 38 and the other end fixed to the base 36, and is formed between the support member 38 and the base 36 by the spacer 44. The clamp member 28 mentioned above is for the space part to become.

The clamp member 28 is fitted to the rod 46 for linear movement and is positioned in a state of receiving elastic force by the elastic member 48 in a predetermined direction.

One end of the elastic member 48 is supported on one side of the support member 38, and the other end thereof is positioned as a groove provided in the clamp member 28.

The clamp member 28 has a surface 50 parallel to the base 36 facing away from the groove 40 having the same curvature as the exhaust pipe.

In the cathode ray tube manufacturing apparatus of the present invention thus formed, the stem is fused to the neck portion of the bulb in a conventional manner, and then the clamp means is operated to straighten the fusion portion.

That is, in the fusion process, since the exhaust pipe E is located in the clamp members 28 of the clamp means and the grooves 40 and 42 of the base 36, the driving means 20 operates because the exhaust pipe is not clamped. It will not have any effect.

At the same time as the fusion is completed, the clamp means is moved horizontally to the left or the right in order to pull the exhaust pipe downward, and this operation results in the state of FIG. 4 from the state of FIG.

In this embodiment, although not shown to move the clamp means from side to side, a device such as a cylinder can be used.

3 is not clamped because the exhaust pipe E is located in the grooves 40 and 42, but if the clamp means is moved without moving the position of the exhaust pipe, the clamp member 28 is shown in FIG. The exhaust pipe E is in a state where the parallel surface 50 of is placed.

Since the distance between the surface F of the base 36 and the parallel surface 50 of the clamp member 28 is designed to be smaller than the outer diameter of the exhaust pipe E, when the exhaust pipe is in this position, the clamp member 28 is on the upper side. The elastic member 48 is elastically moved while receiving a force by compressing the elastic member 48.

The elastic movement of the clamp member 28 results in clamping the exhaust pipe E between the plane 50 parallel to the plane F of the base 36.

That is, the exhaust pipe E is clamped by the pressing force between the clamp member 28 and the base 36. When the clamp means is moved downward by using the driving means in this state, the clamp member 28 and the base 36 move the exhaust pipe E in a clamped state.

This is possible because the clamp member 28 and the base 36 clamp the exhaust pipe.

As described above, the cathode ray tube manufacturing apparatus according to the present invention can straighten the welded portion of the stem and the neck portion by clamping the exhaust pipe so that the structure can be simplified as compared with the conventional apparatus for holding and holding the stem pin. Since the action of clamping or releasing the clamp can be made only by horizontally moving the clamp means, there is an easy control effect.

Claims (4)

Bulb holding means rotatably supporting a bulb having a panel whose inner surface is made of a fluorescent surface in a circumferential direction; Drive means for holding the stem fused to the neck portion of the bulb held by the bulb holding means to displace in the vertical and circumferential directions; And means for clamping or releasing the clamp of the exhaust pipe integrally formed with the stem by moving in a direction orthogonal to the longitudinal direction of the exhaust pipe formed in the stem, wherein the means for clamping or releasing the clamp includes: A cathode ray tube manufacturing apparatus comprising a clamp region formed as a clamp member and a base arranged to have a smaller distance than an outer diameter, and a clamp release region provided to have a distance larger than the outer diameter of the exhaust pipe in the clamp region. The cathode ray tube manufacturing apparatus according to claim 1, wherein the clamp release region is formed of a groove formed between the clamp member and the base with approximately the same curvature as the exhaust pipe. The apparatus of claim 1, wherein the clamp member is supported by the elastic member between the base and the support member. The method according to claim 1, wherein the drive means has a spindle having a stem mounting portion for mounting the stem, the production of cathode ray tubes provided with an insertion portion is provided with a clamping member having a portion exposed to the exhaust pipe and the portion not exposed Device.

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