JPH0778559A - Cathode-ray tube manufacturing device - Google Patents

Abstract

PURPOSE:To provide a panel clamp mechanism of the simple structure and a high reliability by forming a panel clamp part of a rotary head of a hollow pressure contact body which is expanded or contracted by air pressure. CONSTITUTION:In holding a panel 15, a front surface of the panel 15 is brought in contact with a butting part 33 of a clamp mechanism, and the panel 15 is positioned. In this condition, low pressure air is supplied from an air introducing/ sucking tube 34, and a clamp resilient body 41 of each clamp part 32 is expanded, so a press contact part 44 is brought into contact with the side of the panel 15. For releasing hold to the panel 15, the low pressure air is released to reduce air pressure inside the resilient body 41, and the butting part 44 is contracted to release clamping.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a cathode ray tube used for producing a fluorescent screen, and more particularly to a panel clamp mechanism for holding a panel of the cathode ray tube in a pinching manner.

[0002]

2. Description of the Related Art Injection, coating, discharging, drying, exposure, development, etc. of a photosensitive film, carbon slurry, phosphor slurry of each color, etc., in forming a fluorescent screen in a color cathode ray tube are carried out by using a so-called fluorescent screen preparing apparatus. . Usually, the phosphor screen forming device is composed of a green phosphor film, a blue phosphor film, a red phosphor film,
And the like, and each exposure table corresponding thereto is arranged in the order of steps. The coating table has a plurality of arms for supporting the panel radially on the rotary main shaft of the table, and a rotary head capable of rotating and revolving is provided at the tip of each arm, and the panel is held by the rotary head. To be done. A developing means, a heater drying means after development, a slurry (or photosensitive liquid) injecting means, a slurry (or photosensitive liquid) discharging means, a slurry (or photosensitive film) drying means by a heater, etc. are arranged on the outer periphery of the coating table. . While the panel is held by each rotary head, each of the above means is moved during one rotation of the rotation main shaft, and in sequence, development-drying-slurry (or photosensitive solution) injection-spin coating-
Each process of discharging the slurry (or photosensitive liquid) and drying is performed.

The revolution of the rotary head rotates between 0 ° and 180 ° according to each process, and the rotation of the rotary head rotates at an arbitrary number of revolutions from 0 rpm to 300 rpm according to each process.

The rotary head is provided with a panel clamp mechanism having a clamp portion for directly holding the panel of the cathode ray tube. Conventionally, a so-called mechanical chuck method has been adopted as a panel clamp mechanism of a rotary head in a fluorescent screen producing apparatus for a cathode ray tube for a non-consumer, for example, an air cylinder method with a brake, a vari clamp method, a ratchet method, a trapezoidal shape. A screw system, a motor system with a brake, etc. are known.

For example, as shown in FIG. 12, the clamp mechanism 1 of the air cylinder system with a brake has an air cylinder 4 having a clamp portion 3 corresponding to the four sides of the panel 2 of the cathode ray tube, in principle. It is arranged so that the clamp portion 3 is pressed against the four sides of the panel 2 by driving the air cylinder 4 to hold the panel 2 in a pinching manner.

[0006]

However, the mechanical chuck type panel clamp mechanism is more complicated and more costly than the suction pad type clamp mechanism of the cathode ray tube for the consumer, and the reliability is high. There was a problem such as low.

For example, in the air cylinder system with a brake,
Brake maintenance is required, and the structure is large. It is difficult for the burr clamp method to support automation. The ratchet system and the motor system with a brake are large in structure and costly. The trapezoidal screw method also requires maintenance and inspection of screws, and the structure is large.

In view of the above points, the present invention provides an apparatus for manufacturing a cathode ray tube having a rotary head having a panel clamp mechanism having a simple mechanism and a highly reliable panel clamp mechanism. To do.

[0009]

An apparatus for manufacturing a cathode ray tube according to the present invention comprises a rotary head 16 having a panel clamp portion 32 for holding a panel 15 of the cathode ray tube in a pinch manner, and the panel clamp portion 32 is pneumatically operated. It is formed by a hollow pressure-bonded body 41 that expands and contracts.

[0010]

In the present invention, when the panel 15 of the cathode ray tube is held by the rotary head 16, low pressure air is introduced into the hollow pressure-bonding body 41 forming the panel clamp portion 32 to expand and expand the hollow pressure-bonding body 41. The panel 15 is clamped by being crimped to the opposite sides of the panel 15. When the clamp on the panel 15 is released, the hollow pressure-bonded body 41 is retracted by pulling out the air from the hollow pressure-bonded body 41 and separated from the side of the panel to be released from the clamp.

By constructing the panel clamp portion 32 with the hollow crimp body 41 in this manner, the panel clamp mechanism 2
1 can be simplified and a highly reliable clamp operation can be performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cathode ray tube manufacturing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are a front view and a side view showing a main part of a fluorescent screen producing apparatus for a cathode ray tube according to the present invention, that is, a coating table 11 thereof. This application table 11
Is a table body 12, a rotary spindle 13 provided in the center of the table body 12, and a plurality of arms (only one of which is shown in the example shown in the figure) rotating in a horizontal plane about the rotary spindle. A rotary head 16 for holding a cathode ray tube panel 15 provided at the tip of each arm 14 is provided. The plurality of arms 14 are radially around the main spindle 13 and are developed, dried, slurry (or photosensitive liquid) is injected, spin-coated, slurry (or photosensitive liquid).
For example, they are arranged at equiangular intervals so as to correspond to respective work process positions such as discharge and slurry (or photosensitive liquid) drying, and are intermittently rotated to respective work process positions around the rotary spindle 13. Done.

The rotary head 16 is supported by the tip of the arm 14 so that it can rotate a (see FIG. 2) and revolve b (see FIG. 1). As shown in FIGS. 3 and 4, the rotary head 16 includes a clamp mechanism 21 that actually holds the panel 15 and a drive unit 22 that rotates and revolves the clamp mechanism 21. The drive unit 22 has a rotation shaft 24 that is rotated by a motor 23 and also has a rotation shaft 24.
The outer shaft 25 is integrally provided with a revolving shaft 26 that extends left and right in a direction orthogonal to the rotation shaft 24.

A plurality of clamp mechanisms 21 are provided on a support plate 31 integrally attached to the rotation shaft 24 so as to sandwich the panel 15 to be held. In this example, four clamp mechanisms are provided at positions corresponding to four sides of the panel 15. Clamp portion 32 [32A, 32B, 32C,
32D] is fixed. Reference numeral 33 is an abutting portion for positioning, which abuts the front surface of the panel 15 provided on the support plate 31.

In the clamp mechanism 21, air is supplied to the four clamp portions 32A to 32D from the external air introduction / suction pipe 34 through the rotation shaft 24 so that the clamp portion 32 formed by the hollow crimping body can be expanded and contracted by air pressure. Air piping 35 [35A, 35B, for supplying or sucking 37
35C, 35D] are provided.

In the rotation shaft 24, an empty chamber 38 is formed between the outer shaft 25 provided via a bearing bearing and the rotation shaft 24, and an external air introduction / suction pipe 34 is made to communicate with this empty chamber 38. An air hole 39 communicating with the vacant chamber 38 is formed in a part of the rotation shaft 24, and the air hole 39 is formed in each of the air pipes 3.
5A to 35D. Therefore, even when the rotation shaft 24 is rotating at a predetermined rotation speed, the air introduction / suction pipe 3
4-Vacancy 38-Air hole 39-Air piping 35 [35A-3
5D], it is possible to supply low pressure air to each of the clamp portions 32 [32A to 32D]. The same can be done when sucking air from the clamp portion 32.

On the other hand, the clamp portion 32, as shown in FIGS. 5 to 7, for example, is an inflatable / contractible clamp elastic body 41 that contacts the panel 15, a bracket 42 that supports the clamp elastic body 41, and a clamp elastic body. 41 and a plate plate 43 for fixing the bracket 42.

The clamp elastic body 41 has a crimping portion 44 that directly contacts the panel in the center, and an expanding and contracting portion 45 that extends from the periphery of the crimping portion 44 and is normally bent forward in a convex shape to be in a contracted state. Further, the extension portion 46 extending further rearward from the expansion / contraction portion 45 and the flange portion 47 in which the extension end is bent inwardly.
And has a hollow shape. Vertical and horizontal cuts 48 are provided on the panel contact surface of the crimp portion 44. The clamp elastic body 41 is made of, for example, a synthetic rubber of EPT and ultra rubber (NBR rubber and acrylic rubber), and a canvas 49 is embedded therein for direction control and burst prevention.

The bracket 42 has a recess 50 into which the clamp elastic body 41 can be fitted, and an air hole 51 is formed so as to communicate with the recess 50. The clamp elastic body 41 is fitted in the concave portion 50 of the bracket 42, the plate plate 43 is arranged in the concave portion 50 so as to sandwich the flange portion 47 of the clamp elastic body 41, and the bracket 42 is clamped by the screw 53. The elastic body 41 is fixed. A through hole 54 is formed in the plate plate 43 at a position corresponding to the air hole 51 of the bracket 42. In this way, the clamp portion 32 of the hollow crimp body is formed.

Next, the operation of the above-mentioned clamp mechanism 21 will be described. When holding the panel 15, first the panel 1
The front surface of 5 abuts on the abutting portion 33 of the clamp mechanism 21 to position the panel 15. Air introduction in this state
Low pressure air is sent from the suction pipe 34 to each clamp part 3
The clamp elastic bodies 41 of 2A to 32D are expanded and expanded, and the crimping portions 44 thereof are brought into pressure contact with the corresponding sides of the panel 15 (see the chain line in FIG. 8). As a result, the panel 15 is held.

When the holding of the panel is released, low-pressure air is removed to reduce the air pressure in the clamp elastic body 41.
The crimp portion 44 retracts and separates from the panel 15, and the clamp is released.

9 to 11 show another example of the clamp portion 32. The clamp portion 32 includes a clamp elastic body 61 that abuts on the panel 15, a bracket 62, and a plate plate 63 for fixing. The clamp elastic body 61 has a crimping portion 64 that directly contacts the panel 15 in the center, and an expanding / contracting portion 65 and an expanding / contracting portion 65 that extend from the periphery of the crimping portion 64 and are always bent forward in a convex shape. And an end portion of the flange portion 66 which is bent outward. The bottom surface of the flange portion 66 and the bottom surface of the crimp portion 64 are formed flush with each other. The clamp elastic body 61 can also be formed of synthetic rubber in which the above-mentioned canvas 49 is embedded.

The bracket 62 has a recess 67 into which the clamp elastic body 61 is fitted, and a projection ring 68 that abuts the flange portion 66 of the clamp elastic body 61 is formed on the bottom surface of the recess 67, and the recess 67 is formed. And an air hole 69 communicating with the.

When the clamp elastic body 61 is fitted in the concave portion 67 of the bracket 62, the flange portion 66 of the clamp elastic body 61 comes into contact with the projecting ring 68 on the bottom surface of the concave portion so that the crimp portion 64 and the bottom surface of the concave portion 67. A hollow portion 70 is formed between them. The plate plate 63 is arranged so as to be pressed against the upper surface of the flange portion 66, and is fixed to the bracket 62 with screws 71. As a result, the clamp elastic body 61 has the flange portion 66 fixedly held between the bracket 62 and the plate plate 63.

Also in this clamp portion 32, the air hole 6
By supplying air pressure to the hollow portion 70 through 9, the pressure-bonding portion 64 expands and contracts via the expansion / contraction portion 65, and the panel 15 is clamped by clamping. When the clamp is released, the air pressure in the hollow portion 70 is reduced and the crimp portion 64 is retracted.

According to the above-described fluorescent screen producing apparatus 11, the mechanism can be simplified by adopting the so-called air chuck system in which the clamp mechanism 21 of the rotary head 16 is provided with the clamp portion 32 that expands and contracts by air pressure. In addition, the reliability of the clamp mechanism can be improved.

The clamp portion 32 [32A to 32]
D], the rubber pressure-bonding portion 44 (or 64) is attached to the panel 1
Since it is pressed against 5, the panel 15 is not scratched. The clamping operation is performed by the pneumatic clamp elastic body 41.
Since it is performed by the expansion and contraction of (or 61), the response becomes good.

Since the clamp mechanism 21 has no mechanically movable parts, it can be oil-free. At the same time, it is highly dustproof. Further, even if the panel shape is uneven, the clamp portion 32 can reliably clamp the panel surface.

Further, the weight of the clamp mechanism 21 can be reduced, and the overall manufacturing cost can be reduced. Furthermore,
Since the clamp mechanism 21 is simplified, there are actual benefits such as good maintainability.

[0031]

According to the present invention, by using the air chuck type clamp mechanism, the structure is simplified and a highly reliable clamp mechanism can be obtained. The clamp part expands and contracts quickly due to air pressure, so the responsiveness of the clamp operation is good, and since there is no mechanical moving part, there is no lubrication,
Highly dustproof.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing an example of an apparatus for manufacturing a cathode ray tube according to the present invention.

FIG. 2 is a side view of an apparatus for manufacturing a cathode ray tube according to the present invention.

FIG. 3 is a sectional view of a rotary head according to the present invention.

FIG. 4 is a bottom view of the rotary head according to the present invention.

FIG. 5 is a plan view showing an example of a clamp section according to the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

7 is a cross-sectional view taken along the line BB of FIG.

FIG. 8 is an explanatory diagram of the operation of the clamp section.

FIG. 9 is a plan view showing another example of the clamp section according to the present invention.

10 is a sectional view taken along the line CC of FIG.

11 is a cross-sectional view taken along the line DD of FIG.

FIG. 12 is a principle configuration diagram of a conventional clamp mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamping mechanism 2 Panel of cathode ray tube 3 Clamping part 4 Air cylinder 11 Coating table of fluorescent screen creating device 12 Table body 13 Rotating main spindle 14 Arm 15 Cathode ray tube panel 16 Rotary head 21 Clamping mechanism 22 Drive part 23 Rotation motor 24 Rotation Shaft 25 Outer jacket 26 Revolution shaft 32 [32A to 32D] Clamp portion 34 Air introduction / suction pipe 35 [35A to 35D] Air piping 41, 61 Clamp elastic body 42, 62 Bracket 43, 63 Plate plate

Claims (1)

[Claims] 1. A cathode line comprising a rotary head having a panel clamp part for holding a panel of a cathode ray tube in a sandwiched manner, wherein the panel clamp part is formed by a hollow crimping body which expands and contracts by air pressure. Pipe manufacturing equipment.