JPS6026255B2 - Assembling method and device for panel and shadow mask in cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for assembling a panel and a shadow mask in a color cathode ray tube manufacturing process.

Since the panel is made of glass, its dimensional accuracy is poor.

For this purpose, a reference pin is embedded in the inner surface of the periphery of the panel so that it has a predetermined dimension based on the inner plane of the panel, and a leaf spring welded to the frame of the shadow mask that is inserted into the panel is attached to this reference pin. By aligning the reference holes, the panel and the shadow mask are fixed in a predetermined positional relationship. Conventionally, the assembly of the panel and shadow mask has relied on the manual labor of skilled workers.

A major factor that hinders the mechanization of this assembly work is that when a coating of honey is applied to the inner surface of the panel in the early stages of the color cathode ray tube manufacturing process, the coating film is scraped off and becomes deposits inside the tube. Therefore, it was not possible to use the inner plane of the panel as a reference. The present invention aims to improve this point, and does not use the inner plane of the panel as a reference.
By positioning the panel and the shadow mask using the panel's reference pin and the shadow mask's reference hole as references, the panel and the shadow mask can be accurately aligned even if the inner surface of the panel is coated with a phosphor. It is an object of the present invention to provide a method and apparatus that can position and mechanically assemble the two. An embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, a mask transfer machine 3 is installed around the assembly device 1 to transfer shadow masks m of color cathode ray tubes from the mask carry-in conveyor 2 to the mask setting position msp of the assembling device 1. Then, the panel P of the color cathode ray tube is transferred from the panel carrying conveyor (not shown) to the panel setting position ps of the assembly device 1.
an assembly a of the panel P and shadow mask m assembled in the assembly device 1;
An assembly transfer machine 6 for transferring the assembly material from the assembly device 1 to the carry-out conveyor 5 is arranged. Each of the above transfer machines 3 and 4
, 6 is provided with a movable base 8 that moves forward and backward with respect to the assembly device 1 on the upper part of the machine frame 7, and a panel P, a shadow mask m, and an assembly that are moved up and down by a cylinder device 9 are provided below the movable base 8. The chuck mechanism 10 of a is provided.
Further, the assembly apparatus 1 includes a positioning mechanism 11 for the panel P (see FIG. 5) at the panel setting position psp, and the mask setting position ms
A positioning mechanism 12 (see FIG. 9) for the shadow mask m is provided at the center, and a mechanism 12 for moving the panel P at the panel setting position psp to the mask setting position msp is provided at the center. The transport mechanism 13 is provided to cover the shadow mask m.

Here, as shown in FIGS. 3 and 4, the panel P has a pair of main reference pins x, and a bar protruding from the center of two opposing surfaces in the longitudinal direction among the inner surfaces of the peripheral edge. A sub-reference pin y. or y
,,y2 are provided protrudingly.

Next, the positioning mechanism 11 for the panel P provided at the panel setting position psp of the assembly apparatus 1 will be explained based on FIGS. 5 to 8.

At the panel setting position pSp, a hole 21 is drilled in the counterfeit stand 20 of the assembly device 1, and the hole 21 is
Left and right ball screw holes 23, which are respectively rotated by left and right pulse motors 22, are horizontally arranged below the ball screw punches 23, and a movable table 24 serving as a base is screwed into the left and right ball screw punches 23, respectively. Air cylinders 25 as vertical movement devices are attached to the sides of the left and right moving tables 24, respectively, and at the tips of the piston rods 26 of the left and right air cylinders 25,
Push-up plates 28 that move up and down guided by guides 27 fixed to the upper surface of the movable table 24 are fixed to each other, and left and right main reference pins x of the panel P are attached to the upper ends of the left and right push-up plates 28.
, , x2, a V-shaped positioning groove 29 is formed. When the panel P with the Sekiguchi facing downward is supplied to the panel setting position psp, the positioning mechanism 11 of the panel P is moved by the pulse motor 22 to the ball screw position as shown in FIG. 23 to move the left push-up plate 28a to the left, and this push-up plate 2
8a, press the left main reference pin x, and press the panel P.
to a preset position.

At this time, the main reference pin cedar on the right side and the push-up plate 28b on the right side
The position of the right push-up plate 28b is set in advance by the number of pulses of the right pulse motor 22 so that a slight gap is created between the two. Next, as shown in FIG. 7, the left push-up plate 28a is slightly horizontally moved in the direction of arrow 32 by the pulse motor 22 to create a gap between it and the left main reference pin The push-up plate 28a is lowered in the direction of arrow 33, and then moved horizontally in the direction of arrow 34 by the pulse motor 22 to position the push-up plate 28a directly below the left main reference pin x. The push-up plate 28a is raised in the direction of the arrow 35 by the air cylinder 25, and the left main reference pin x is pushed up so that it rises a small distance 12 above the table surface. Similarly to the left main reference pin x, the right main reference pin x2 is also pushed upward by the right push-up plate 28b, which is sequentially moved in the directions of arrows 36, 37, and 38, as shown in FIG. In this action, the left and right main reference pins x, . The cedar is engaged with the V-shaped positioning grooves 29 of the left and right push-up plates 28 and is accurately positioned. Next, the positioning mechanism 12 for the shadow mask m provided at the mask setting position msp of the assembly apparatus 1 will be explained based on FIGS. 9 to 14. The shadow mask m includes a pair of leaf springs 42 having main reference holes e, e2 that compete with the pair of main reference pins x, x2 of the panel P, and sub-reference pins y, y, of the panel P. , y2 and a pair of plate springs 44, which are drilled with sub-reference holes f, , y2, are welded to the outer surface of the frame 45. Now, the above mask setting position msp
Left and right pulse motors 48 are disposed below the mounting table 47 of the assembly device 1, and the left and right pulse motors 48
A ball screw punch 49 is connected to each of the left and right ball screw punches 49, a moving table 50 is screwed to each of the left and right ball screw punches 49, a air cylinder 51 is attached to the upper surface of the left and right moving table 50, and a piston rod of the left and right air cylinder 51 is connected to the ball screw punch 49. At the tip of the shadow mask m, a positioning tool 52 whose conical tip moves forward and backward with respect to the main reference holes e, , e2 of the shadow mask m is attached, and the main reference holes e, , e2 are bored. The spring presser 53 that moves forward and backward with respect to the pair of leaf springs 42 is moved by the moving base 5.
Attach on top of 0.

The tip of the positioning tool 52 is moved forward and backward through the notched groove 54 of the spring presser 53. In addition, the main reference holes e,, e2
Similarly to the spring holder 53 for the plate spring 42, a spring holder 55 for the plates 44 of the sub-reference holes U, , and the like and a mechanism (not shown) for moving the spring holder 55 forward and backward are provided.

Furthermore, four hydraulic cylinders 59 are provided inside the shadow mask m, each of which includes a presser 57 that moves forward and backward toward one side of the frame 45 and a presser 58 that moves forward and backward toward the other side of the frame 45.

When the shadow mask m with the opening facing downward is supplied to the mask setting position msp, the positioning mechanism 12 of the shadow mask m is operated by the pulse motor as shown in FIGS. 11 and 12. 48 to move the movable table 50 and press the spring holders 53, 55 at four locations.
At the same time, the left and right positioning tools 52 are inserted into the main reference holes e, e2 of the corresponding leaf springs 42 by the left and right air cylinders 51 to accurately position the shadow mask m. Make a delivery.

Next, as shown in FIG. 13, the hydraulic cylinder 59 is operated to bring the pressers 57 and 58 into contact with the inner surface of the frame 45, and the hydraulic circuit of the hydraulic cylinder 59 is closed, thereby fixing the shadow mask m. . Next, in the fixed state, as shown in FIG. 14, the air cylinder 51 is operated to pull out the positioning tool 52 from the main reference holes e, e2. Next, a transfer machine 13 provided at the center of the assembly device 1
will be explained based on FIGS. 1 and 2.

A rotating shaft 62 is provided in the center of the table 61, and this rotating shaft 6
A drive mechanism 63 for rotating the rotating shaft 62 clockwise by 90 degrees is connected to the lower end of the rotary shaft 62, and a rotation arm 64 is fixed to the upper end of the rotating shaft 62, and air cylinders 65 are attached to both ends of the arm 64. vacuum cups 66 are attached to the lower ends of the piston rods of the air cylinders 65 on both sides. Note that 67 in the figure is a guide. Then, as shown in FIG. 15, the panel setting position psp
As shown in FIG. 15, the panel P positioned in
5, the arm 64 rotates the panel P clockwise 9 times to transfer it directly above the shadow mask m positioned at the mask setting position msp, and the air cylinder 65 is lowered to place the panel P in the shadow. mask m
to be competed in.

At this time, as shown in FIG. 16, the shadow mask m
Since all the leaf springs 42 and 44 are pressed inward by the spring holders 53 and 55, the panel P can be covered with the shadow mask M without being obstructed by the leaf springs 42 and 44.

Next, as shown in FIG. 17, the pulse motor 48 is operated to move the spring retainer 53 outward, and the push-up plate 28 is moved outward.
makes the main reference pins x, , x2 of the panel P, which have already been positioned relative to each other by the positioning tool 52, compete with the main reference holes e, , e2 of the leaf spring 42 of the shadow mask m. Here, the sub-reference pins y,, y2 of the panel P and the shadow mask m
Sub-reference hole f,, remove the push-up plate 28 and positioning odor 5
2, the alignment may not be achieved as shown in FIG. 18.

Therefore, in the frame 45 of the shadow mask m, on the lower side of the two sides where the leaf springs 44 of the sub-reference holes L and f2 are attached,
These two sides are alternately pressed down and the shadow mask m is swung around the main reference pins x, x2 as fulcrums.
A pressure air cylinder (not shown) is provided as an adjustment device for aligning the sub-reference holes f, f2 of the leaf springs 44 with the sub-reference pins y, y2 of the panel P.

The piston rod 70 is shown in FIG. Next, the overall operation of the assembly device 1 will be explained in FIGS.
This will be explained based on FIG.

{11 Start (Figure 20).

{21 Panel P to panel setting position ps
After being transferred to P, the pair of main reference pins x, x2 are positioned by the positioning machine 11 (21st
figure).

{3' After the panel P is held by the transfer mechanism 13 and the shadow mask m is transferred to the mask setting position msp, the pair of main reference holes e, e2 are positioned by the positioning mechanism 12. Figure 22).

'41 Panel P and shadow mask m are assembled, and the next panel P is moved and positioned (Fig. 23).

The assembly a of the above process is picked up, the next panel P is held, and at the same time the next shadow mask m is transferred and positioned (FIG. 24).

■ The assembly a is transferred to a position facing the carry-out conveyor 5, and the next panel P and shadow mask m are
At the same time, the next panel P is moved and positioned (Fig. 26). '7} Perform the same work as in step [31] and transfer the assembly a to the carry-out conveyor 5. Repeat the above steps in order. According to the present invention, the panel is positioned by engaging the pair of main reference pins of the panel with the corresponding positioning grooves of the push-up plate, and the corresponding positioning tool is inserted into the pair of main reference holes of the shadow mask. Since the position of the shadow mask is determined by using iron inserts, compared to the conventional method of detecting the position of the pins based on the inner plane of the panel, even if the inner plane of the panel is coated with crab light, etc. There are no problems,
The panel and shadow mask can be accurately positioned and both can be lined up.

In addition, a pair of pre-positioned main reference pins of the panel are iron-coupled with a pair of pre-positioned main reference holes of the shadow mask, and then the shadow mask is swung using the main reference pins of the panel as a fulcrum, and the panel Since the sub-reference pin of the shadow mask and the sub-reference hole of the shadow mask are iron-coupled, the work of assembling the panel and the shadow mask itself can be easily performed, and the work can be easily streamlined. In addition, by providing assembly equipment that can faithfully carry out such work, we can eliminate the inefficiency and inefficiency of traditional manual labor.
High burden can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the apparatus for assembling a panel and shadow mask in a cathode ray tube according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a plan view showing a 3-pin type panel, and FIG. 5 is a front view of the panel positioning mechanism 11, FIGS. 6 and 7 are sectional views of the main parts showing the operation of the mechanism 11, and FIG. 8 is the mechanism 11. FIG. 9 is a front view of the shadow mask positioning mechanism 12, and FIG.
11 is a perspective view of the main parts of the mechanism 12, FIG. 12 is a plan view of the main parts showing the action of the mechanism 12, and FIGS. 13 and 14 are the mechanism 12. Fig. 15 is a perspective view showing the action of the transfer mechanism; Figs. 16, 17, and 18 are sectional views of essential parts showing the assembly action of the panel and shadow mask; Fig. 19 is a bottom view showing the action of the transfer mechanism; The figures are cross-sectional views showing the action of the adjustment device, Fig. 20, Fig. 21,
Figures 22, 23, 24, 25, and 2
FIG. 6 is a plan view showing the operation of the assembly device. P...Cathode ray tube panel, m...Shadow mask, x,
, Uniform...Main reference pin, y,,y2...
Sub reference pin, e,, e2...Main reference hole, L, f2...Sub reference hole, pSp...''Panel setting position, m
sp...mask setting position, 13...
...Transfer mechanism, 24...Movement table as a base,
25... Air cylinder as vertical movement counterfeit, 2
8... Push-up plate, 29... Positioning groove, 42, 4
4... Leaf spring, 45... Frame, 52... Positioning tool, 53, 55... Spring holder, 70...
・Piston rod of air cylinder as adjustment device. ※'Fig. Figure '7' Figure '8' Figure Pig '0 Figure Hagen Zukai 2' Figure Bribery 2 Figure Connecting Genzu Jibutsu Zujibutsu Zu Kakuzu

Claims (1)

[Claims] 1. A panel comprising a pair of main reference pins protruding from the center of two opposing inner surfaces of the peripheral edge and a sub reference pin protruding from the center of the remaining one or two surfaces. , a pair of leaf springs each having a main reference hole drilled therein which is fitted to a pair of main reference pins of this panel, and a leaf spring having a sub-datum hole drilled therein which is fitted to a sub-reference pin of the panel, are attached to a frame. A positioning groove formed at the upper end of the push-up plate is engaged from below with a pair of main reference pins of the panel arranged with the opening facing downward, and the push-up plate is The panel is accurately positioned by raising the panel, and a positioning tool with a conical tip is inserted from the outside into the main reference holes of the pair of leaf springs of the shadow mask, which are arranged with their openings facing downward. Accurate positioning is performed, all leaf springs of this shadow mask are pressed by spring holders, and the positioning tool is retreated from the pair of main reference holes, and the positioned panel is placed on the top of the positioned shadow mask. transfer the panel, fit the panel onto the shadow mask, loosen the spring holder, fit the main reference holes of the pair of leaf springs of the shadow mask into the pair of main reference pins of the panel, and then tighten the pair of main reference pins. A method for assembling a panel and a shadow mask in a cathode ray tube, characterized in that the shadow mask is slightly swung using the shadow mask as a fulcrum so that a sub-reference hole of a plate spring of the shadow mask is fitted into a sub-reference pin of the panel. 2 A panel setting position in which a panel is arranged with a pair of main reference pins protruding from the center of two opposing inner surfaces of the peripheral edge and a sub reference pin protruding from the center of the remaining one or two surfaces. a pair of leaf springs each having a main reference hole that fits into the pair of main reference pins in the panel; and a leaf spring having a sub-reference hole that fits into the sub-reference pin of the panel. a mask setting position for arranging a shadow mask formed by fixing and fixing to the outer surface of the frame;
a transport mechanism for transporting the panel at the panel setting position to the mask setting position and fitting the panel onto the shadow mask at the mask setting position; A pair of bases is arranged below the panel arranged facing downward, a vertical movement device is provided on each of the pair of bases, a push-up plate is attached to each of the pair of vertical movement devices, and the pair of bases is provided with a vertical movement device. A positioning groove is formed at the upper end of the push-up plate so as to face the main reference pin of the panel, and this leaf spring is provided on the outside of all the leaf springs of the shadow mask which is arranged with the opening facing downward in the mask setting position. disposing a spring holder that moves forward and backward relative to the pair of leaf springs of the shadow mask, and disposing a positioning tool outside the main reference hole of the pair of leaf springs of the shadow mask, the conical tip of which moves forward and backward with respect to the main reference hole; In the frame of the shadow mask, place the secondary reference holes of the leaf springs of the shadow mask on the lower side of the two sides that are not the attachment parts of the pair of leaf springs in which the main reference holes are drilled, by slightly moving the two sides alternately. An assembly device for a panel and a shadow mask for a cathode ray tube, characterized in that an adjustment device that fits into a reference pin is provided.