JPH0136220B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to an assembly device for an electron gun for a color picture tube, and in particular to an assembly device for an electron gun for a color picture tube, and particularly to an assembly device for an electron gun for a color picture tube. It concerns withdrawal and distribution after withdrawal.

(Prior Art) In general, to assemble an electron gun for a color picture tube, parts such as electrodes formed in a plate shape or a shallow cap shape are stacked alternately with spacers at predetermined intervals. The molten bead glass is fixed to the protrusion on the side of the unit, and the unit is assembled into one piece.

Here, as the electron gun, the structure of a bipotential electron gun in which three electron guns are arranged in a line and integrated will be explained with reference to FIGS. 1 and 2. In the figure, 11 is a heater, 12 is a cathode that houses the heater 11, and a first grid 13 is disposed opposite to the cathode 12 at a predetermined interval. Furthermore, from this first grid 13, a second grid 14, a third grid 15, a fourth grid 16,
The fifth grid 17 and the sixth grid 18 are arranged opposite each other at a predetermined interval. These heaters 11 and the electrodes 12...18 each have implanted portions 11a, 12a...18a that protrude laterally, and bead glass located laterally through these implanted portions 11a, 12a...18a. Combined with 19.

When assembling such an electron gun, first place the sixth grid 18 on an electrode assembly jig (not shown), and place the spacer 20 as shown in FIG. 4
Grid 16, spacer 22, third grid 1
5. Place the spacer 23, second grid 14, spacer 24, and first grid 13 in this order. Furthermore, the spacer 25, the implanted portion 12a of the cathode 12, and the implanted portion 11a of the heater 11 are supported by rods (not shown) provided in the electrode assembly jig, and the intervals between the electrodes and their implanted portions are set as specified. Assemble to maintain distance. After this assembly, the implanted portion 18 of each electrode
Bead glass 1 made by softening a, 17a...11a
Plant it on 9 and integrate it.

After the electrode structure is constructed as described above and the bead glass 19 has cooled and solidified, each spacer 20,
21...25 are pulled out to make an electron gun without a cathode and heater, as shown in FIG. Finally, while measuring the distance from the electron beam passage hole of the first grid 13 using a measuring device, the cathode 12 is welded to the implanted part 12a as shown in FIGS. 1 and 2. In addition, the heater 11 is installed in the implanted part 11.
Weld to a.

In the manufacturing process of the electron gun, when pulling out the spacers 20, 21, . . . 25 from the electrode structure shown in FIG. He had pulled out a sheet. Also, the distribution of the pulled out spacers is
A worker measures or sorts each spacer while performing the process.

(Problems to be Solved by the Invention) In the conventional method described above, since the spacer is manually pulled out by an operator, the distance between each electrode is likely to vary during pulling out, and each electrode is likely to be damaged or deformed. , which has a great impact on the performance of the electron gun. Further, since a clamping device such as tweezers is used to pull out the spacer, the work is difficult because slipping occurs and the clamping force is not constant, and the work efficiency is extremely low. Furthermore, the distribution after drawing was entirely dependent on the operator, resulting in poor work efficiency.

The purpose of the present invention is to stabilize the work and reduce the occurrence of defects by pulling out the spacer from the electrode structure using mechanical force, and to significantly improve the work efficiency and easily adapt to automation. It is an object of the present invention to provide an assembly device for an electron gun, which can also easily perform distribution after extraction.

[Structure of the invention]

(Means for Solving the Problems) The first invention is to provide a spacer between adjacent electrodes of an electron gun, and to pull out the spacer from between each electrode with the distance between each electrode set to a predetermined value. The assembly device for an electron gun for extraction, wherein each of the spacers has a substantially equal planar shape and has a locking hole for extraction at an end, and supports an electrode structure in which the spacer is interposed between each of the electrodes. It has an electrode structure holding mechanism for fixing, a slider having a pin that can be engaged with the locking hole of the spacer, and an actuation mechanism that moves the slider forward and backward along the direction in which the spacer is pulled out, and includes the slider and the actuation mechanism. and a spacer extraction mechanism having a drive mechanism that moves the movable table forward and backward along the thickness direction of the spacer.

In addition to the above-mentioned configuration, the second invention includes a sorter that receives the spacers pulled out by the spacer pull-out mechanism and guides the spacers through a shutter, and a shutter that is arranged so that the outlet of the shutter is opposed to a predetermined storage box. The spacer distribution mechanism includes a moving mechanism for moving the spacer.

(Function) In the present invention, an electrode assembly is constructed by interposing a spacer between each electrode of an electron gun, and this electrode assembly is supported and fixed by the operation of an electrode assembly holding mechanism. Then, the slider of the spacer pull-out mechanism is moved toward the spacer by the operating mechanism, and the drive mechanism lowers the movable table slightly to engage the pin with the locking hole of the spacer. The actuation mechanism then moves the slider in the opposite direction to pull the spacer out of the electrode assembly. This pulling operation is repeated for the number of spacers interposed in the electrode structure.

Further, the pulled out spacers come off the pins and fall into the sorter of the spacer distribution mechanism, and the spacers received by the sorter are distributed and stored in the corresponding boxes via the shooter.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 5 shows spacers 20, 21 used in the present invention.
...25 is shown, and each spacer 20, 21...
25 have substantially the same planar shape, and a locking hole 26 for pulling out is provided at the same position at the end.

FIG. 6 shows an electrode structure holding mechanism 27 that supports and fixes the electrode structure shown in FIG. In the figure,
Reference numeral 28 denotes a table that supports the entire electrode assembly holding mechanism 27, and a cylinder 29 is vertically attached to the upper surface of this table 28. This cylinder 29
The piston rod 30 extends downwardly through the table 28 and connects to the plate 33 via joints 31,32. A claw 34 for pressing the electrode assembly is provided on the lower surface of the plate 33, and the claw 34 presses down the stationary electrode assembly to support and fix it. Further, the table 2 is provided on the upper surface of the plate 33.
Bearing 37 in bracket 36 attached to the bottom surface of 8
The lower ends of the pair of shafts 38 that are slidably fitted together are connected.

The electrode assembly holding mechanism 27 moves the piston rod 30 downward in the figure as shown by the arrow by the operation of the cylinder 29, thereby moving the pawl 34 in the same direction, thereby making it possible to pull out the spacer of the electrode assembly (not shown), which will be described later. Support and fix in a stable condition.

FIG. 7 shows the spacer 20,
21...25 is shown. In the figure, reference numeral 41 denotes a support table. A bracket 42 is attached to the upper surface of the table 41, and a pair of vertically extending shafts 43 are supported and fixed by this bracket 42. Reference numeral 44 denotes a moving table, which is composed of a pair of bearing parts 44a that slide together with the pair of shafts 43, and a connecting plate 44b that integrally connects them. A slider 46 is attached to the movable table 44 via a guide 47 so as to be slidable in the lateral direction shown in the figure, that is, in the direction in which the spacer is pulled out. The left end of the slider 46 in the figure is connected via a support rod 48 and a joint 49 to an actuation mechanism 50 that moves the slider 46 forward and backward in the direction in which the spacer is pulled out. As this operating mechanism 50, for example, as shown in the figure, a cylinder 50a attached to the moving table 44 via an L-shaped support 51 may be used, and its piston rod 50b may be connected to the slider 46 via the joint 49 or the like.

Further, at the right end of the slider 46 in the drawing, a fifth
A pin 53 is provided which engages with the locking hole 26 of each spacer 20, 21...25 shown in the figure. When the spacers 20, 21, . . . 25 are interposed between the electrodes, the locking holes 26 are set so that they all face in the same direction. Note that the one-dot chain line in the figure represents the electrode structure shown in FIG.

Reference numeral 55 denotes a drive mechanism that moves the movable table 44 up and down, that is, moves it forward and backward along the thickness direction of the spacer, and is driven by a pulse motor 5 provided inside the bracket 42.
5a, and a vertical ball screw 5 connected to the pulse motor 55a via a coupling 55b.
5c, and a nut 55d mounted on the connecting plate 44b of the moving table 44 and screwed into the ball screw 55c.
It consists of

When the spacer extraction mechanism 40 extracts the spacer from the electrode assembly, the spacer extraction mechanism 40 first operates the pulse motor 55.
a ball screw 55c that rotates and connects to it.
The moving table 44 is moved to the start position via the nut 55d screwed thereto. This starting position refers to the position where the slider 46 attached to the moving table 44 has been moved to a height corresponding to the spacer 20 shown in FIG. At this starting position, the slider 46 is moved by the cylinder 50a as shown by the arrow, so that the pin 53 provided at its tip faces the locking hole 26 of the spacer 20. In this state, the pulse motor 55a is rotated again, the moving table 44 is slightly lowered, and the pin 53 is moved to the spacer 2.
0 into the locking hole 26. Next, the cylinder 50a is operated in the opposite direction to the above, and the slider 4
6 in the direction opposite to the arrow, and pull out the spacer 20 engaged with the pin 53 at its tip from the electrode assembly. After pulling out, the pulse motor 55a is rotated again to move the moving table 44 to a position corresponding to the next spacer 21, and thereafter the spacer 21 is pulled out by the same operation as described above. In this way, pull out the spacers one by one, and remove all the spacers 20, 21...2.
5, the pulse motor 55a returns the movable table 44 to its original starting position in preparation for the next electrode assembly. Here, by setting the number of pulses to be applied to the pulse motor 55a in advance using a control circuit (not shown), it is possible to obtain the amount of rotation, that is, the amount of movement of the moving table 44, in accordance with the set number of pulses. Therefore, in order to perform the above-mentioned operation, the number of pulses may be set and programmed in accordance with the spacing between each electrode.

FIG. 8 shows a spacer distribution mechanism 60 that distributes pulled out spacers according to their thickness;
The figure is a plan view thereof. In the figure, reference numeral 61 denotes a support table, and a bracket 62 attached to the top surface of the table 61 supports a cylindrical body 63 passing through the table 61 and a sorter 64 having a tapered opening connected to its upper end. This sorter 64 receives the spacers pulled out by the spacer pulling mechanism 40, and its upper end is offset from the center of the cylindrical body 63, as shown in FIG. 9, in order to match the movement locus of the slider 46. Reference numeral 66 denotes a shutter, which has a connecting portion 66a rotatably fitted to the outer periphery of the lower end of the cylinder body 63, and a guide portion 66b extending diagonally downward from the connecting portion 66a, and is connected via a coupling 67. A mechanism such as a pulse motor 68 drives the lower end opening 66c so as to draw an arc. The pulse motor 68 is supported and fixed on the lower surface of the table 61 via a plate 69 and a support 70 by a bracket 71 extending from the lower end of the support 70. Further, on the arcuate locus of movement of the lower end opening 66c of the shutter 66, as shown in FIG. There is. Of course, the opening of each box 73 is the shutter 6.
The rotation amount of the pulse motor 68 is set so as to face the lower end opening 66c of the pulse motor 68, respectively. Also,
A disc 75 for detecting a rotation angle is provided on the outer periphery of the connecting portion 66a of the shooter 66 and is engaged with a detection switch 76. This detection switch 76 is connected to a disk 75.
When the lower end opening 66c of the shutter 66 reaches the final box 73, a command is issued to the pulse motor 68 to rotate the lower end opening 66c of the shutter 66 to a position facing the first box 73.

The spacer distribution mechanism 60 receives the spacers that are pulled out from the electrode assembly by the spacer extraction mechanism 40 and falls, with a sorter 64, and the cylindrical body 63
and the corresponding box 73 via the computer 66.
and store it in this box 73. In this case, in order to distribute each spacer according to its thickness, the pulse motor 68 is rotated each time a spacer is received, and the lower end opening of the shooter 66 is made to face a different box 73, respectively. When the final box 73 is reached, this is detected by the detection switch 76 that engages with the disc 75, and the box is returned until it faces the first box 73.

FIG. 10 shows the above-mentioned mechanisms together, and the spacer pulling mechanism 40 and the spacer distribution mechanism 60 commonly use support tables 41 and 61, and the upper end opening of the sorter 64 of the spacer distribution mechanism 60 is shown in FIG. is located below the movement locus of the slider 46 of the spacer extraction mechanism 40, and the pin 5 of the slider 46 is
This is to ensure that the spacer that falls off from 3 is caught.

Although the electrode structure holding mechanism 27 shown in FIG. 6 is not shown, it is in a position where it can hold down the electrode structure shown by the two-dot chain line.

Next, to explain the overall operation, the electrode structure is transferred from the previous process, a detection device (not shown) detects that it has reached a predetermined position, and the electrode structure holding mechanism 27 shown in FIG. Give operation commands. This command causes the cylinder 29 shown in FIG. 6 to operate, and its claw 34 holds, supports and fixes the stationary electrode structure at a predetermined position. Next, an operation command is given to the spacer extraction mechanism 40 shown in FIG. 7, and the slider 46, which is waiting at the start position described above, is moved in the direction of the arrow by the operation mechanism 50, and then the moving table 44 is moved by the pulse motor 55a. Lower it slightly to engage the pin 53 with the locking hole 26 of the spacer. Then, the slider 46 is moved in the direction opposite to the arrow by the actuating mechanism 50, and the spacer is pulled out from the electrode structure. This pulling operation is repeated as many times as there are spacers interposed in the electrode structure. The pulled out spacer comes off the pin 53 and falls into the sorter 64 of the spacer distribution mechanism 60. Sorter 64
The spacer received by the cylindrical body 63 and the shutter 6
6 and are distributed and stored in corresponding boxes 73 according to their thickness.

Since all of the above-mentioned work processes are mechanized, there are fewer defective products compared to conventional processes that were done manually, and work efficiency is greatly improved.

Next, another embodiment of the present invention will be described. When constructing an electrode structure, if three spacers are used between one electrode, each spacer must be identical, with a notch formed at one end and a locking hole for pulling out the spacer and holding the spacer at the other end. Use a shape. These are arranged so that the direction of the spacer located at the center is opposite to the direction of the other spacers. When pulling out, first engage the pins in the locking holes of each spacer, then engage the center spacer with the locking holes of the spacers other than the center while keeping the pins engaged with the locking holes of the spacers other than the center. Then, the other spacer can be pulled out using the pin that is engaged with the locking hole.

In this case, the spacer extraction mechanism requires one for the center spacer and one for the other spacers.
Since the spacer can be pulled out in a stable state using mechanical force, the electrodes will not be damaged or deformed.

〔Effect of the invention〕

According to the present invention, when the spacer is pulled out from the electrode assembly in the electron gun assembly process, the electrode assembly is supported and fixed, and the locking hole provided in the spacer is inserted into the locking hole in the spacer withdrawal direction and the spacer thickness. By engaging pins that move forward and backward in the direction and pulling them out sequentially, the entire spacer extraction work can be automated, making the work more stable and eliminating defective products without damaging or deforming the electrodes. It is possible to significantly reduce the occurrence of electron gun, stabilize the performance of the electron gun, and greatly improve its working efficiency.
This has great effects in improving work efficiency and productivity, such as eliminating manual labor.

Furthermore, by receiving the pulled out spacer with a sorter and guiding it to the box with a shooter,
It can also be easily distributed and work efficiency can be further improved.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view showing an example of the configuration of an electron gun, Figure 2 is a partially cutaway side view of Figure 1, and Figure 3 is an electrode in the middle of the electron gun manufacturing process. 4 is a sectional view showing the electron gun before the cathode and heater are attached, FIG. 5 is a plan view of the spacer used in the present invention, and FIG. 6 is a sectional view showing the electrode structure holding mechanism used in the present invention. 7 is a front view showing a spacer extraction mechanism used in the present invention; FIG. 8 is a partially cut-away front view showing a spacer distributing mechanism used in the present invention; FIG. 8 is a plan view of FIG. 8, and FIG. 10 is a partially cutaway front view showing an embodiment of an electron gun assembly apparatus according to the present invention. 12, 13, 14, 15, 16, 17, 18...
...Electrode, 20, 21, 22, 23, 24, 25...
... Spacer, 26 ... Locking hole, 27 ... Electrode structure holding mechanism, 40 ... Spacer extraction mechanism, 44 ...
Moving table, 46... slider, 50... operating mechanism,
53... Pulling pin, 55... Drive mechanism, 60
... Spacer distribution mechanism, 64 ... Sorter, 66 ...
...Shooter, 68...Movement mechanism, 73...Box.

Claims (1)

[Scope of Claims] 1. An assembly device for an electron gun, wherein a spacer is interposed between adjacent electrodes of an electron gun, and the spacer is pulled out from between each electrode with the distance between each electrode set to a predetermined value. , each of the spacers has substantially the same planar shape and has a locking hole for pulling out at the end, an electrode structure holding mechanism that supports and fixes the electrode structure in which the spacer is interposed between each of the electrodes; It has a slider having a pin that can be engaged with the locking hole of the spacer, and an actuation mechanism that moves the slider forward and backward in the direction in which the spacer is pulled out, and a moving stage that includes the slider and the actuation mechanism in the thickness direction of the spacer. An electron gun assembly device comprising: a spacer extraction mechanism having a drive mechanism that moves forward and backward along the spacer; 2. An assembly device for an electron gun, in which a spacer is interposed between adjacent electrodes of an electron gun, and the spacer is pulled out from between each electrode with the distance between each electrode set to a predetermined value, wherein each spacer is an electrode structure holding mechanism that has substantially the same planar shape and has a locking hole for pulling out at an end, and supports and fixes the electrode structure with a spacer interposed between each of the electrodes; and a locking hole of the spacer; A drive that includes a slider having an engageable pin and an actuation mechanism that moves the slider forward and backward along the direction in which the spacer is pulled out, and that moves a moving table including the slider and the actuation mechanism forward and backward along the thickness direction of the spacer. A spacer extraction mechanism having a spacer extraction mechanism, and a moving mechanism that receives the spacers pulled out by the spacer extraction mechanism by a sorter and guides them to a shooter, and moves the shooter so that the outlet of the shooter faces a predetermined storage box. An electron gun assembly device comprising: a spacer distribution mechanism;