JPH0492334A - Method of attaching grid to frame of color cathode ray tube - Google Patents

Abstract

PURPOSE:To cut off wire rods left over outside a frame and fix wire-rod grids to the frame under a certain tension by individually the wire-rod grids. CONSTITUTION:Wire-rod grids 4 composed of wire-rod grids to be independent to each other are prepared, arranged on the frame of a color cathode ray tube at a predetermined pitch, maintained at the predetermined pitch by gutter type array plates 5 disposed on both sides of the frame and fixed to the frame under a predetermined independent tensile force applied to the respective wire-rod grids 4, and the wire-rod grids left over outside the frame are cut off. According to the present invention, since a tensile force can be applied individually to the wire-rod grids one by one, an arbitrary tensile force is applied at an arbitrary position of each wire-rod grid in the main beam of the frame, so that the appropriate wire stretch may be performed for every wire-rod grid.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to the manufacture of color televisions, and in particular to the attachment of grids to color cathode tube frames.

[Conventional technology]

When attaching a grid to the frame of a conventional color cathode tube, in the case of the wire method, a thin steel plate is processed using an etching method, and a so-called sudare-like grid is manufactured in which hundreds to thousands of wire rods are connected at both ends. has been done. In this case, each wire grid is not independent, so it is easy to apply equal tension to each wire or change the tension of each wire grid and fix it to the frame separately. Also, depending on the position of the wire grid, Different tensions may be applied to the wire grid.

[Problem U that the invention seeks to solve]

With conventional sagging-shaped wire grids, when tensioning the wires onto the frame, it is desirable to increase the tension sequentially from the center wire grid to the end wire grids, but since both ends are connected, each There was a problem in that it was difficult to change the tension of the wire grid. An object of the present invention is to provide a method for attaching a grid that can arbitrarily change the tension of several hundred to more than one thousand wire rods, since each wire rod grid is independent.

[Means to solve the problem]

The method of attaching a wire grid to the frame of a color cathode tube in the present invention is to prepare a wire grid consisting of mutually independent wire grids, arrange the wire grids at a predetermined pitch on the frame of the color cathode tube, and then The predetermined pitch is maintained by a cleaning alignment plate provided on the side, each wire grid is fixed to the frame while applying an independent predetermined tension to each wire grid, and the wire grid outside the frame is separated. It consists of things. In the present invention, the predetermined tension is a sufficiently large tension necessary to maintain the wire grid. Furthermore, welding or the like can be used to fix each wire grid to the frame.

[Effect]

In the present invention, since the wire grid is arranged singly,
- After fixing the wire grid and the frame one by one on the frame by welding or the like while applying a predetermined tension to each wire independently, it is possible to cut off the remaining wire outside the frame. As a result, the wire grid is fixed to the frame under constant tension.

【Example】

The present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show an example of a color cathode tube frame. The frame consists of a main beam 1 and a support beam 2, which are fixed to each other by welding or the like. The upper surface 3 of the main beam 1 is the surface on which the grid is placed. FIGS. 3 and 4 show a state in which a grid 4 made of the required number of wire rods is stretched on the upper surface 3 of the main beam 1. In FIGS. 3 and 4, it is necessary that a tension T is applied to the wire grid 4 stretched on the frame. In this case, it is desirable that the tension is changed from the tension T1 of the center grid 4 to the tension TO of the end grid 4 as it goes from the center to the ends. In the present invention, as shown in FIG.
Alignment plates 5 are provided near the main beam 1 on both sides to keep them aligned at a constant pitch. The alignment plate 5 has a groove 6, and after positioning the wire grid 4 using the groove 6, the wire grid 4 is fixed to the main beam 1 using, for example, an electrode rod 7. Below, attachment of the wire grid 4 will be explained in detail. Alignment plates 5 are fixed on both sides of the main beam 1 to fix the frame of the main beam 1 and the support beam 2 on the pedestal 8, and to align the wire grids 4 at a fixed pitch. The alignment plate 5 has a radius of curvature R that is the same as the radius of curvature of the main beam 1 of the frame, as shown in FIGS. 6 and 7, and the height above the frame 8 is also the same as that of the main beam 1. There is a groove 6 on the upper surface 14 of the alignment plate, and protrusions 12 come out from the groove 6 at a predetermined pitch. A wire grid 4 is arranged between the protrusions 12, so that the required number of wire grids 4 are arranged at a predetermined pitch. Returning to FIG. 5, the pedestal 8 is provided with a fixing bracket 9 on one side of the alignment plate 5 and a pulley 10 on the other side of the alignment plate 5, and a weight 11 is suspended from the pulley 10. There is. Therefore, -tIA15 of the grid wire is fixed to the fixing bracket 9, and the other end 16 can be tied to the weight 11 via the pulley 10. Thus, the weight 11 is placed on the wire grid 4.
gives tensions T1a to Tna. There are hundreds to thousands of wire grids 4, but they are not connected to each other and are independent, so each wire grid 4 has 11 weights.
By changing the weight of the wire grid 4, the tension T1a to Tna of the wire grid 4 can be freely changed. Furthermore, since the wire grid 4 is in contact with the top surface 3 of the main beam 1 of the frame, in this state, for example, a constant load is applied from above the wire grid 4 at tt[[7] which is directly above the top surface 3 of the main beam 1. If the wire grid 4 is pressed and a current is applied, the lower surface of the wire grid 4 and the upper surface 3 of the main beam 1 of the frame are welded. This welding work is carried out one by one or several wire rod grids 4 aligned on the upper surface 3 of the main beam 1 on the two sides of the frame, and in this way, all the wire rod grids 4 are welded to the frame, and the wire rods 4 are welded to the frame. This completes the fixing of the grid. Thereafter, all of the wire grids 4 are cut by UJ on both sides of the main beam 1 of the frame to complete the installation work. In FIG. 9, the wire grid 4 is connected to the upper surface 3 of the main beam 1 of the frame.
shows a part of the welded state at a predetermined pitch (interval). As the wire grid 4 is cut, the frame is slightly deformed due to the tension of the wire grid 4 fixed to the frame. That is, as shown in FIG. 8, when the wire grid 4 is welded to the main beam 1 of the frame, the main beam 1 is at the position of the dotted line a,
After cutting the wire grid 4, the main beam 1 is pulled and deformed due to the tension of the wire grid 4. Then, the deformation reaction force of the main beam 1 and the tension T of the wire grid 4 are corrected at the position b (the final position of the main beam 1 in FIG. 8, the deformation amount δ at the center). This is the finished product. Therefore, in the state of the finished product, the wire grid 4 is
The initial tensions Tla to Tna are determined so that the initial tensions T1a to Tna are loosened and the tensions are reduced, but the tensions T1 to Tn are maintained as shown in FIG. As shown in FIG. 5, the initial tension Tna of the wire grid 4
While keeping the weight of the weight 11 changed for each wire grid,
If welded to the upper surface 3 of the main beam 1 of the frame, after cutting the wire grid 4, the main beam 1 will be pulled by the initial tension Tna of the wire grid 4 as shown in FIG. When the final position is already in equilibrium, the wire grid 4 is 1
A predetermined tension is obtained individually so that the tension of each book is T1 to Tn. The tensions T1 to Tn can be obtained freely during the conventional
The method of the present invention solves the problem. As shown in Figure 8, a steel frame with h=5001i and J=650II was manufactured, and the cross-sectional area A=0°06II1.
12, Young's modulus E = 1.7X10' direction/lll12
Tensile strength σt = 70 kQ/am', yield strength σy = 6
To 0! J/Ill', a grid was made from trapezoidal steel wire with a base of 0.5 inches and tested. 942 wire grids 4 are arranged on the main beam 1 of the frame at a pitch of 0°7 ml, and the tension of the wire grid 4 near the center of the main beam 1 is 3 kg, and the tension of the wire grid 4 is gradually increased toward both ends. 2 kg near both ends.
A tension of 100 mL was applied to the wire grid 4. All the wire grids 4 are welded on the main beams 1 on two sides, and then the weights 11 are cut off.
The wire grid 4 was cut outside the main beam 1 to obtain a frame on which the wire grid 4 was stretched. As a result, the wire grid 4 at both ends of the frame 1 has a force of 2 kg and a natural frequency of 2.
051/sec, 1.5 kg in wire grid 4 in the center
A wire-clad frame (see Fig. 3) was obtained that had a tension of 1/sec and a natural frequency of 175 1/sec.

【Effect of the invention】

Since the present invention is configured as described above, when a wire grid is stretched on the frame of a color cathode tube of a television, the present invention allows tension to be applied to each wire grid individually, so that the wire grid can be tensioned individually. Appropriate wire tension can be applied to each wire grid by applying any tension to the wire grid at any position on the wire grid in the main beam.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a frame of a color cathode tube. 2 is a side view of the frame of the color cathode tube of FIG. 1. FIG. FIG. 3 is a plan view showing a state in which a wire grid is stretched on the upper surface of the frame. 4 is a partially cutaway side view of the frame and wire grid of FIG. 3; FIG. FIG. 9 is a partial side view showing a state in which the wire grid is welded to the main beam of the frame at a predetermined pitch (interval). (Margins below this page) This is a front view. FIG. 6 is a side view showing an example of an alignment plate for positioning the wire grid. FIG. 7 is a partial sectional view of the alignment plate of FIG. 6. FIG. 8 is a plan view showing the deformation of the main beam before and after the weight is cut off after the wire grid is fixed to the main beam of the frame. In the figure, reference numbers represent the following:・Main beam, ・Support beam, ・Top surface of main beam, ・Grid, ・Alignment plate, ・Groove, ・Electrode rod, ・Fixing bracket, ・Pulley, ・Weight. Figure 2

Claims (1)

[Claims] Grids made of mutually independent wire rods are prepared, and the wire grids are arranged at a predetermined pitch on a frame of a color cathode tube, and groove-type alignment plates provided on both sides of the frame Fixing each wire grid to the frame while maintaining the predetermined pitch and applying an independent predetermined tension to each wire grid, and then cutting off the wire grid outside the frame. How to install.