JPH10125224A - Pressurizing jig used in manufacturing color selecting electrode of color crt, and manufacture of color selecting electrode of color crt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of wrinkles on an electrode element assembly by using a pressurizing jig having a fixed projection provided on a prescribed face of a block in contact with the vicinity of the center section of one of the upper and lower members, to which many electrode element assemblies are fixed, of the frame of a color selecting electrode and an oscillating projection having a planer contact face provided on the prescribed face of the block is contact with the vicinity of the center section of one of the upper and lower members. SOLUTION: This pressurizing jig 20 is provided with an extremely small-diameter semicylindrical projection 22 extended in the nearly perpendicular direction to the long side from one long side to this side of the other long side near one end section on one side face of a nearly rectangular solid-shaped block 21. The pressurizing jig 20 is also provided with an oscillating projection 23 having a planar contact face 23a in contact with one of the upper and lower members of a frame near the other end section on one side face of the block 21. A recess 24 is provided at the other end section of the block 21, and the oscillating projection 23 is inserted into the recess 24 so that a part of the contact face 23a side is exposed. When two pressurizing jigs 20 are used to pressurize the frame, the applied force to the vicinities of both end sections of the upper and lower members is distributed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing jig used for manufacturing a color selection electrode for a color cathode ray tube and a method for manufacturing a color selection electrode for a color cathode ray tube.

[0002]

2. Description of the Related Art A conventional process for manufacturing a color selection electrode having a large number of color selection electrode elements corresponding to a striped three primary color phosphor screen of a color cathode ray tube will be described below with reference to FIG. I do. In FIG. 2A, 1 is a frame,
The frame 1 includes upper and lower members (hereinafter, referred to as A members) 2A, 2B and left and right members (hereinafter, referred to as B members) 3L, 3R each having an L-shaped cross section made of a steel material or the like.

Further, on the back side of the B members 3L and 3R,
The self-temperature correction elements 4L and 4R such as bimetals are fixed by welding or the like, and spring holders 5A and 5B for holding leaf springs to be fitted to pins formed on the inner surface of the panel of the color cathode ray tube are attached to the A members 2A and 2B. The spring holders 5L and 5R are fixed to the side surfaces of the members 2A and 2B; 3L and 3R by welding as indicated by arrows on the B members 3L and 3R.

Next, as shown in FIG. 2B, a number of color selection electrode elements 6 are fixed to the frame 1 by welding or the like. In order to explain the manufacturing method of the large number of color selection electrode elements 6, a large number of slits 7 are formed in a rectangular thin mild steel plate by a photochemical etching method, so that a large number of color selection electrode elements held by a frame are formed. The body 6 is formed.

As shown by an arrow G, a tension is applied to the color selection electrode element 6 so that both sides thereof are pulled in the direction in which the color selection electrode element 6 extends.
As shown by the arrow F, a large number of color selection electrode elements 6 are applied in a state where a force is applied in a direction in which the distance between the A members 2A and 2B is reduced.
Are fixed to the A members 2A and 2B of the frame 1 by welding.

Next, a method of pressing the frame 1 of the color selection electrode will be described with reference to FIG. Of the A members 2A and 2B of the frame 1, for example, the member 2A is fixed by a pair of fixing jigs 9, and a pair of pressing jigs 1 is provided on the member 2B side.
0, the A member 2B is pressed by the pressurizing mechanism 11 such as a hydraulic device so that the distance between the A members 2B and 2A is reduced.
Press.

As shown in FIG. 4, a conventional example of the pressing jig 10 has a long side extending from one long side to a side short of the other long side on one side of a substantially rectangular block 11. A pair of semi-cylindrical protrusions 12, 12 having an extremely small diameter of about R3 (radius 3 mm) extending in a substantially vertical direction are provided near both ends. The pair of projections 12, 12 are brought into contact with the A member 2B of the frame 1. Reference numeral 13 denotes an engaging portion provided on the back side of the block 11 for engaging with a pressing mechanism (see FIG. 3).

[0008]

When the A member 2B of the frame 1 is pressurized by using two such pressurizing jigs 10,
In order to reduce the weight of the frame 1 and to design it to have a wide aspect ratio (the aspect ratio is set to be longer than the aspect ratio of 3: 4, for example, the aspect ratio is set to 9:16), the B member 3L of the A members 2A and 2B is used. There is a problem that wrinkles occur in the electrode element 8 after the blackening process, which is stretched at a portion close to the joint with the 3R.

In view of the foregoing, the present invention provides a pressing jig used in manufacturing a color selection electrode of a color cathode ray tube, which does not cause wrinkles in an electrode element fixed near both ends of upper and lower members of a frame. It is something to try to suggest.

Another object of the present invention is to propose a method of manufacturing a color selection electrode of a color cathode ray tube, which does not cause wrinkles in an electrode element fixed near both ends of upper and lower members of a frame.

[0011]

According to the present invention, a pressing jig used in manufacturing a color selection electrode of a color cathode ray tube according to the present invention comprises a block and upper and lower members to which a number of electrode elements of a frame of the color selection electrode are fixed. A fixed projection provided on a predetermined surface of the block so as to be in contact with the vicinity of one central portion, and a planar projection provided on a predetermined surface of the block so as to be in contact with the vicinity of one end of the upper and lower members. And a swing projection having a contact surface.

According to the pressing jig of the present invention, two such pressing jigs are used, and the fixing projections of the two pressing jigs are
The two pressing jigs are brought into contact with the vicinity of one center of the upper and lower members, and each of the swinging projections is brought into contact with the vicinity of one of both ends of the upper and lower members, and the other of the upper and lower members is fixed to the fixing jig In the fixed state, a force is applied to the pressing jig so that the interval between the upper and lower members is reduced, so that the planar contact portion of the swinging convex portion is entirely on one surface of the upper and lower members of the frame. Since the contact is made, the pressing force applied to the vicinity of both ends of the upper and lower members is dispersed, so that there is no possibility that wrinkles are generated in the electrode body stretched and fixed to the upper and lower members of the frame.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pressing jig according to an embodiment of the present invention will be described below with reference to FIG. Figures 1A, B and C
3 is a plan view, a front view, and a perspective view of the pressing jig. The pressing jig 20 extends in a direction substantially perpendicular to the long side from one long side to a side short of the other long side near one end on one side surface (plane) of the substantially rectangular parallelepiped block 11. A semi-cylindrical convex portion 22 having an extremely small diameter of about R3 (radius 3 mm)
Near the other end on one side surface of the block 11, a swinging convex portion 23 having a flat contact surface 23a for contacting one of the upper and lower members 2A, 2B of the frame 1 is provided.
Configure.

A recess 24 is provided at the other end of the block 21. A swing projection 23 is fitted into the recess 24 so as to partially expose the surface 23a side. A semi-cylindrical projection 25b rotatably fitted into a semi-cylindrical recess 25a provided on a back plate 25 in the recess 24 is integrally provided.

As described with reference to FIG. 2B, tension is applied to a large number of color selection electrode elements 6 so that both sides thereof are pulled in the extension direction of the color selection electrode element 6 as shown by an arrow G. With respect to the frame 1, as shown by an arrow F, a state where a force is applied in a direction in which the interval between the A members 2 </ b> A and 2 </ b> B is reduced, the vicinity of both ends of the large number of color selection electrode The first A members 2A, 2B are fixed by welding.

According to the pressing jig 20 of this embodiment,
As described with reference to FIG. 3, two pressing jigs 20 are used in place of the pressing jig 10, and each fixed projection 22 of the two pressing jigs 20 is connected to the upper and lower members (A members) 2A. , 2B, and each of the swinging projections 23 of the two pressing jigs 20 is brought into contact with the vicinity of one of both ends of the upper and lower members 2A, 2B. In a state where the other of 2A and 2B is fixed by the fixing jig 9, by applying a force to the pressing jig 20 by the pressing mechanism 11 such as a hydraulic device so that the interval between the upper and lower members 2A and 2B is reduced. Swing projection 23
The flat contact portion 23a of the upper and lower members 2A of the frame 1,
Since the entire surface is in contact with one surface of the upper and lower members 2B, the pressing force applied to both ends of the upper and lower members is dispersed.
Despite the lightweight design and wide aspect design,
There is no danger of wrinkles occurring in the color selection electrode body 8 stretched and fixed to the upper and lower members 2A, 2B of the frame 1, particularly the color selection electrode body 8 attached to both ends of the upper and lower members 2A, 2B.

[0017]

According to the first aspect of the present invention, the color selection electrode frame is provided on the predetermined surface of the block so as to come into contact with the vicinity of one central portion of the upper and lower members to which the plurality of electrode elements are fixed. The fixed convex portion and the swinging convex portion having a planar contact surface provided on a predetermined surface of the block so as to be in contact with the vicinity of one end of the upper and lower members. And to obtain a pressing jig for use in the manufacture of a color selection electrode for a color cathode ray tube, which does not cause wrinkles in the electrode body fixed near both ends of the upper and lower members of the frame despite the wide aspect design. Can be.

According to the second aspect of the present invention, the block is provided on a predetermined surface of the block so as to be in contact with the vicinity of one central portion of the upper and lower members to which the plurality of electrode elements of the color selection electrode frame are fixed. The fixed convex portion provided, provided on a predetermined surface of the block so as to contact near one end of the upper and lower members,
Two pressurizing jigs having a swinging convex portion having a planar contact surface are used, and each fixed convex portion of the two pressurizing jigs is brought into contact with the vicinity of one central portion of the upper and lower members, and The distance between the upper and lower members is reduced in a state where the respective swinging convex portions of the two pressing jigs are brought into contact with the vicinity of one of both ends of the upper and lower members and the other of the upper and lower members is fixed by the fixing jig. As described above, a large number of color selection electrode elements were fixed between the upper and lower members of the frame in a state where a force was applied to the pressing jig. Nevertheless,
A method for manufacturing a color selection electrode of a color cathode-ray tube in which wrinkles are not likely to be generated in the color selection electrode body fixed near both ends of the upper and lower members of the frame can be obtained.

[Brief description of the drawings]

FIG. 1A is a plan view showing a pressing jig according to an embodiment of the present invention. B is a front view thereof. C is a perspective view thereof.

FIG. 2 is an explanatory view showing a manufacturing process of a conventional color selection electrode.

FIG. 3 is an explanatory view of a conventional method of pressing a frame of a color selection electrode.

FIG. 4 is a perspective view showing a conventional pressing jig.

[Explanation of symbols]

Reference Signs List 20 pressure jig, 21 block, 22 convex part, 23
Swiveling convex, 24 concave, 25 back plate

Claims (2)

[Claims] 1. A block, comprising: a fixed convex portion provided on a predetermined surface of the block so as to be in contact with a central portion of one of upper and lower members to which a large number of electrode elements of a color selection electrode frame are fixed; And a swing projection provided on a predetermined surface of the block so as to come into contact with the vicinity of one end of the upper and lower members, and a swinging projection having a planar contact surface. Pressing jig used for manufacturing sorting electrodes 2. A fixed projection provided on a predetermined surface of the block so as to come into contact with the block and near the center of one of upper and lower members to which a number of color selection electrode bodies of the frame of the color selection electrode are fixed. And two pressurizing jigs each having a part and a swing projection provided on a predetermined surface of the block so as to come into contact with the vicinity of one end of the upper and lower members. The fixed projections of the two pressing jigs are brought into contact with the vicinity of the center of one of the upper and lower members, and the swing projections of the two pressing jigs are A state in which a force is applied to the pressing jig so that the space between the upper and lower members is reduced while the other of the upper and lower members is fixed with a fixing jig while being brought into contact with the vicinity of one of both ends of the upper and lower members. In such a manner, the plurality of color selection electrode bodies are stretched between upper and lower members of the frame. Method of manufacturing a color selection electrode of a color cathode ray tube, characterized in that the wear.