JPS5814443A - Electron-gun assembling system - Google Patents

Abstract

PURPOSE:To obtain a high-quality electron gun, through a stable process and without deteriorating a cathode, by adjusting the distance between the cathode and a first grid to a given dimension during the assembly work of the electron gun, and mechanizing the whole welding process of the cathode. CONSTITUTION:In adjusting the distance between a cathode 11 attached to a welding electrode and a first grid 12 of an electron gun structure, the first grid 12, at first, becomes in contact with the end surface of a dummy 88 by a cam mechanism or the like by means of a positioning device 25. After that, a second movable table 29 is driven with a pulse motor 38, by means of a control unit 34 which is actuated on the basis of electric signals sent from an A-E converter so that the distance between ends of air nozzles 30 and the bottom surface of a concave part 89 of the dummy 88 becomes a given value. Next, the positioning device 25 is returned back to the right side of the figure so as to make the first grid 12 and the cathode 11 to become adjacent to one another. Following that, a first movable table 26 is driven with a pulse motor 36 so that the distance between the above ends of the air nozzles 30 and the cathode 11 becomes (A), by producing shift commands from the control unit 34.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used for assembling an electron gun for an H-ray picture tube, and is used in an electron gun assembly apparatus in which the distance between the can-r and the spear is set to a predetermined dimension. .

In general, electron guns for color picture tubes are 3 and 5F2.
1%! The heater image is shown in 5 as indicated by l.
, further Kl! Multiple Tsuku lJ 7 FalaSe141i
14111, etc., in a pair of bead mounts in a predetermined positional relationship. In an electron gun like Jin, the distance between the cathode I and the 'jIf1 grid 1 has a great influence on the performance of the electron gun, so this distance must be set accurately to a predetermined dimension. As shown in JjF3 diagram, Sai 1 diagram and Yako 2
Assemble the electron gun assembly (1) by removing the can-fall and heater from the one shown in the figure, and
' The can-I'll was positioned correctly with respect to the fin K, and then the can-I'll was assembled integrally with the holding member (1,) Kllllll.

Conventionally, for the above-mentioned positioning and welding, an operator first manually attaches the cathode II to the welding electrode from a tray using a tool capable of holding the cathode, such as a bottle set, and then attaches the can-Fll and lF1 grid a. The distance was set using a constant device such as an air microphone condenser meter, and then welded to the holding member (1,).

However, in the above-mentioned conventional work method, the operator manually attaches the cathode al to the welding electric wire, so that the cathode aυ cannot be attached to the welding electrode. It is easy to cause deformation, deformation, etc., and the work efficiency is also low, which greatly affects the performance of the electron gun. Also, the interval setting is done by the operator F)llI! This made the work difficult, and from this point of view, the work efficiency was low. In other words, conventionally 0 work was done manually by the worker.

Since the process required a lot of labor and time, there was room for improvement in terms of work efficiency and product quality.

The purpose of the present invention is to scatter the cathode onto the welding electrode and to
Electron gun assembly equipment that stabilizes the grid work by mechanically setting the distance between the grid and the grid without relying on nests or iillK, resulting in high-quality products and a significant improvement in work efficiency. There are many ways to provide the following. ``The present invention also provides a cathode transfer mechanism that suction-holds the cathode placed on a tray and places it transparently on a stand placed at a predetermined position, and a cathode transfer mechanism that moves the cathode placed on the stand. an insertion mechanism for inserting the bracket into a holding block facing the bracket, and a holding block holding the bracket to a position opposite to a welding electrode arranged linearly with the central axis of the first grid of the electron gun assembly. A cathode mounting mechanism that sends out a cathode from a holding pull to attach the cathode in the holding block to the S* electrode, and positioning the cathode attached to the first grid of the electron gun assembly and the welding electrode at predetermined intervals. The present invention is characterized by comprising a third connecting device which moves the cathode positioned at a predetermined interval from the first grift to the holding member X on the electron gun structure side in cooperation with the **t*. It is something.

The present invention will be described below with reference to an embodiment shown in FIG. 11. In I1wA, (g) is a positioning device, which will be explained in detail below with reference to Figures 6 and 27, and sm. (2) is the movable stand for the spearhead, and the support stand is placed above and below in Figure 16 - (in off-Ii, the direction perpendicular to the plane of the paper, O41!1
The electron gun assembly (2) shown in Figure 8 is movable along the left and right directions.
is supported and fixed with its axis recessed in the above-mentioned moving direction.

@i-sai! The movable base of the spear 1 is movable in the same direction Kfa as the moving direction of the movable base @,) of the spear 1, and the air nozzle (to) for im-determination is installed so that the air blowing direction is the same as the moving direction. Support and fix so that they match. The above air nozzles (■) are provided in three rows corresponding to the guns 1I1 constituting the electron gun assembly (1), and each passes through a through hole provided at the center 11 of each grid shown in the diagram. The tip faces the end face of a dummy and a cathode, which will be described later, via an electron beam passage hole provided at the center lI of the grid a. In addition, these air nozzles hthI, as shown in Figure 8, communicate with air I through K and sea, respectively, and blow air 2 from the tip toward the opposing object. The above-mentioned MuE conversion *an G family generates an electric signal corresponding to the distance to the opposing object by the back pressure of the air nozzle (to), and is provided for each air nozzle (to). (To) is a switching system that automatically switches the electrical signals from each MuE converter achin and transmits them to the control device (2).

es is connected to the movable base 1 through a gear mechanism using a pulse motor, and drives it in the moving direction Kf11. ＠ is also a pulse motor, which is connected to the moving table (2) of spear 2 through a gear mechanism, and moves it in the same direction Kl [I
I do. The control stirrup (incorporated) receives the electric signal from the MU converter SEW and connects it to the moving base IHIK of 1 or IF5 so that the distance between the tip of the corresponding air nozzle and the opposing object becomes a predetermined value. Give a movement command and drive the corresponding pulse motor.

- is the gun pitch feed mechanism, and the gear mechanism 4 is attached to the support stand @.
The electron gun assembly on the movable base (toward) of the spear 1 is moved through the support base (2) by the rigid plate of the pulse motor 11, The direction of juxtaposition is 6rIJ and 11! To the left of l 1!
8) Feed the gun along the vertical direction (in Figure 8) by the mounting pitch of each gun.

Returning to Figure J-4 and Figure 11, - is a welding device, which will be explained in detail below with reference to Figure 1 and Figure 10.

- is one welding electrode, which is arranged and fixed so as to form a straight line with one of the air nozzles -. This welding electrode has a collet shape and is inserted into the cylindrical portion of the cathode II to hold it. 4 is a bushing rod, which is moved in the horizontal direction Kf in the figure to spread out the collet-shaped part of the welding electrode.
A is provided so that it can move forward and backward. - is the cylinder for the sex clamp, - is the cylinder for the clamp, and the above v! The working end of the cylinder for the electric clamp (the right end indicated by If) is connected to the fixed end of the cylinder for the clamp (I
! The working end of the cylinder 4 for this clamp (the left end in ml) is connected to the bush n7F- through the link 6. As shown, the cylinder moves the bush P7 to the right in the figure once, and the welding electrode
Push out -w:t clamp 0th cylinder-
As a result of this operation, the push rod F- further moves in the same direction, and the fII grounding electrode is further pushed, causing the push rod F-(1) to move further in the same direction.
Make sure to classicize 1.

Here, the reason why the two-stage operation of the secondary clamp and the clamp is performed is as follows. In other words, the cathode I is attached to the electrode by the cathode attachment mechanism described later, but it is not always attached in a straight position.
In some cases, it may be worn in a closed position. In such a case, if you try to spread out the collet-shaped electrode and clamp it at once, the can F (El) will be deformed depending on the attachment shape 11.
Widen it a certain degree and clamp it, make the clearance between the can FIB tight KL and make the can Full follow the welding electrode. In this state, the welding electrode is further spread and clamped to minimize movement due to pressure contact during welding.

The mallet is the other welding electrode, and is attached to the tip of the actuator whose middle part is rotatably supported, and the hammer is attached to the outside of the cathode aυ clamped to the one welding electrode.
to face. In addition, the actuator (goods) is always moved from the spring ajK to the right (1) in the figure, that is, the other welding electrode (■) is
It receives the aS force in the direction of pressing against the outer circumferential surface of Flll, and @ is an interlocking body that is configured to be able to move forward and backward in the left and right directions in the figure.

At the right end of the layer, there is a part of the taper that engages with the left end of the actuator shaft as shown in the figure and assembles the clockwise movement of the actuator shaft. ＠ is a cylinder for S-contact operation, which is connected to the above-mentioned interlocking body ①, and is driven to the left as shown by the dashed arrow in the figure to release the engagement with the actuator and connect the other welding electrode to the other welding electrode. Allows pressure contact movement toward the outer peripheral surface of the can.

Returning to Figure 4 and Figure 4, - is the cathode transfer mechanism, which has an arm that is pivotably supported horizontally by a column -. At the tip of this arm ■? As shown in Fig. 11, a vacuum nozzle ring is attached so as to be movable up and down, and the vacuum nozzle attracts and holds the cathode on the tray.

The above tray (■) has a large number of cathodes arranged in a constant pattern (not shown), as shown in Figure 11.
e) in the cathode arrangement direction, that is, the X-axis direction (IEI
X-axis table and tray that move horizontally and horizontally
is held by a Y-axis table that moves the Y-axis in the Y-axis direction perpendicular to the I-axis.

These X-axis tables and Y-axis tables are fed at a constant pitch by corresponding pulse motors and gear mechanisms. These pulse motors are controlled by a digital switch (not shown). That is, X
When the pulse generator for driving the shaft repeatedly feeds a preset number of times (determined by the number of cathodes arranged),
This is detected by a digital switch, the pulse motor for driving the T-axis is operated for 1R, and then the feeding operation in the X-axis direction is repeated again. If you control this to 5,
The position where the vacuum nozzle @ adsorbs the cand on the tray is always at a constant position.

The cathode transfer machine*m performs 51'C as described above and adsorbs the cathode on the tray, then moves the arm at $.degree. The cathode is placed on a V-block-shaped stand shown by III.

The spear 415 and the spear l11 (2) are a canard attachment mechanism, which is constructed at the upper end of the arm 4 whose lower end is rotatably supported, and will be described in more detail below with the spear 111IK. n is a holding block, and the cathode also has a holding hole ■ for holding υ and a ventilation hole communicating with the holding hole σ barrel, and this ventilation chamber (2)′ is equipped with a vacuum and air blower. Provide a ventilation hole (■) that serves both purposes.

This holding block (2) is placed within a support block provided at the upper end of the arm (2) within a certain range as shown in the left and right sides of the figure. I is held so that it can slide. a is the ventilation path,
Air is supplied to the space inside the right shoulder of the holding block (2) in the support block ring to move the holding pull pull (2) to the left in the figure. Further, the holding hole σ barrel of the holding block n is moved to two positions by the arm 40 rotations: a position facing the V block-shaped table (2), and a position facing the tip of the welding electrode. do.

Returning to FIG. 11, the V-block-shaped stand n is configured to be movable toward the right in the figure so that it can approach the holding block (2). ■ is the insertion mechanism, which has an operating rod,
As a result, the can Y υ loaded on the table (2) is pushed into the holding hole (to) of the holding block n, and this operating rod applies air blow to the cathode toward the holding hole (2). .

Contrary to the diagram above, - is a dummy, which is provided at the upper end of the arm (to) concentrically with the holding hole (to) of the holding pull pull (2). l! Due to the rotation of the arm.

As shown by the arrow 4III1, it can be located both on the straight line connecting the air nozzle and the welding electrode and at a retracted position away from this line. This gummy is spear 14!
As shown by IEI, the end face facing the air nozzle (end) has a predetermined interval (G
It forms a concave S- of IIs equal to μ).

Furthermore, she is 41 years old! ! , - in the 6th figure is the judgment mechanism, which is shown in 1 year old 8th figure! According to the notes from Conversion-1, the interval between the first grid I and the can-Fll after welding is a predetermined value (G, /
K) range! Determine whether it is in I.

Further, each drive pulse motor is controlled so as to set the distance between the air nozzle and the cathode to a predetermined value.

Next, the effect will be explained. First, the tray indicated by I21II.
The case where the upper cathode I is attached to the welding electrode will be explained. In this case, a vacuum nozzle provided at the tip of an arm indicated by a spear 11wJ is lowered over the tray (2), and the can Fa1 on the tray (top) is vacuum-adsorbed and held. Thereafter, the vacuum nozzle branch is raised, and the arm is rotated by 10 degrees to position the vacuum nozzle on the V-block-shaped platform σJ shown in Fig. 11. At this position, the vacuum state Ai3 is lowered again, the vacuum nozzle is set to non-vacuum, and the cathode I is positioned on the stand n.Next, this stand (2) is moved to the right in the figure by a cam mechanism (not shown), etc. , approach the holding button (2) of the cathode attachment mechanism in the position shown in the diagram.

After this, drive the operating rod indicated by 11 to the right in the diagram, press the can (to) one above, and push it into the holding hole ■ of the holding pushpiece indicated by 11. At this time, at the same time, blow air from the operating rod ⑒ to ensure that the cathode I is inserted smoothly. In addition, the airflow amount σ connected to the holding hole (2) k is switched to the vacuum state by the ventilation hole -, so the cathode aD
The insertion operation is performed smoothly, and the can-F61 does not fall off.

Next, by rotating the 7-m (to) of the cathode mounting mechanism, the holding prong holding the can-I'1m is removed.
(2) is fI111I! as shown in the 4th m11. The electrode '- is moved to a position within the first electrode pair. At this time, of course, the dummy also moves, and the air nozzle ■ and welding electrode
It is located on Naotoso.

In the above state, air is fed into the ring of the support block through the ventilation path shown in the cross-sectional diagram to move the 9% holding block (2) to the left in the figure and bring it closer to the tip of the welding electrode. Furthermore, the ventilation hole in the holding block (2) is switched to air blow to create a positive pressure in the ventilation chamber (to), and the cathode in the holding hole (to) is sent out to the left in the figure. Therefore, the cathode is Welding electrode close to the open end of the holding hole (to)
It is attached to the tip of the When the cathode is pumped out, the air blow by the vent is cut off and the holding block (2)
also returns to its original position.

On the other hand, in the welding device 1, the Schilling-WW shown in Fig. 9 and Fig. 10 operates in sequence, and [the collet-shaped welding electrode] is spread out through the bushing rod, and the can-F@l is -! Clamp after clamp.

Next, we will explain the case where the distance between the cathode (Il attached to the "C" welding electrode) and the spear 1 grid I of the electron gun assembly (2) is set as described above.In this case, first, the positioning device ( 2), the 1f1 grid (l) of the electron gun assembly (2) comes into contact with the end of the dummy by a cam mechanism (not shown) as shown by the spear 1411. In this state, the tip of the air nozzle (to) When the distance from the bottom of the concave part ■ of DA 1-1 becomes a predetermined value MU, set it to 1 to 5, and set the electric note from the MU! converter CI to 1 [to the control device (2)! The moving table of spear 2 is driven by the pulse motor.In this way, the air nozzle
When the distance between the tip of the holder and the bottom of the recess 11 and H reaches a predetermined value, the movement command from the control device (b) disappears, and the pulse motor (to) is stopped.

Next, by using a cam mechanism (not shown) or the like, the positioning charge (c) is once moved to the right in the figure KtL, and the arm (to) is moved to retract the dummy to the position shown in FIG. Then, using a cam mechanism (not shown) or the like, move the positioning device (toward) toward the electrode, bringing the spear 1grid F (1 m) closer to the cathode aυ attached to the welding electrode. Air is blown out from the air nozzle (to) shown in the figure, and based on the electric signal from the MuX converter, the air nozzle (
The distance between the tip of (To) and Ka-F11 is JIP1! ill
As shown in the figure, a command to move the spear 1 to the moving base is issued from the control device so that the predetermined value is achieved, and the swk* wing of the spear 1 is driven with pulses. When the above-mentioned interval reaches a predetermined value, a transfer command from the control device (goods) is sent.
disappears, the pulses stop, and one positioning is completed. At this time, the distance between the spear grid I and the cathode I becomes a neat value (o, /K) from the relationship of the spear 1411.

In the state positioned as described above, the cathode 11 is located within its holding portion #(11,) as shown in the arrow Is diagram.
1 figure of spear, talent! As shown in the figure, it is identified in the bead mount. This welding is carried out on the cylinder shown in Figure 10 (
II of the holding member (11,) where the other welding electrode is aligned with the outer periphery of the cathode II by operating the interlocking body to the left in the figure as shown by the dashed arrow.
IIK is driven towards the cathode I, and presses the space between the welding electrode and the welding electrode deposited in the cathode I to weld.

When the above-mentioned welding is completed, the determination mechanism eυ shown in FIG. 14 determines whether the distance between the welded grit F(2) and the cathode ap is a predetermined value (G 1 , /K 2 ).

After this determination is completed, the electron gun assembly (2) is moved by a preset pitch in the direction in which the guns are arranged KfEi by the gun pitch feeding mechanism (A) shown in Figure 1 and Figure 1. After that, the above-mentioned assembly work is repeated again.As mentioned above, according to the main report 1'lK, the electron gun assembly worker 11
By setting the interval between the grid and the cathode to a predetermined dimension and by mechanizing all the work of welding the cathode, the work is stable and the cathode tSV can be changed. You can get a high quality electron gun without having to worry about it.

In addition, work efficiency is greatly improved, and it has a great effect on improving work efficiency, such as eliminating manual labor.

[Brief explanation of drawings]

Figure 1 of fang and figure 2 of spear show the electron gun after assembly. Figure 3 is a sectional view showing the electron gun assembly before assembling the cathode, and Figure 4 is a cross-sectional view showing the electron gun assembly before assembling the cathode. Figure 61!1%o1 is a picture of a thousand rain showing the positioning device used in this launch.
Figure 11 is a diagram showing the control section of the above-mentioned positioning device, Figure 10 is a flat diagram showing the device used in the present invention, and spear 11111 is a diagram showing the control section of the positioning device. Partial diagram showing the F$ sending mechanism and insertion mechanism, ttt
The figure shows the cathode traying used in the present invention.The figure shows the cathode traying used in the present invention. Figure 1i, which shows the positioning state of the cathode, is a Wtw table showing the positioning state of the cathode. α car cathode, (11,)...holding 11#, ■...
F% (2)...electronic gun structure, @...positioning device, (2)...11-year-old 1 harming table, @...2-year-old movable table, (to)...air nozzle, ( 2)...Mu 1 conversion -1
(To)・O switch, (Foundation)・・Control device 1wJ・・Gun pitch feed mechanism, @Fist・** device, -@Ko・** Electrode. ■・φcurrer transfer mechanism, -...tray, n...stand, (
c)・Φ cand attachment mechanism, n-9 holding block, -・
・Insertion mechanism, -...Da general-1-...Recess.

Claims (4)

[Claims] (1) A cathode transfer mechanism that holds the cathode placed on the tray and transfers and places it on a table placed at a predetermined position tK, and a can-1 placed on the table. An insertion mechanism for inserting into the opposing holding blocks and a holding block holding the can-r are moved to a position opposite to the center axis of the first grid of the electron gun assembly and the ** electrode arranged in the shape of an electric wire. The can-r in the holding block above is
*For electrodes! a cathode mounting mechanism that sends out the cathode from the holding block to place the cathode in the first position; a positioning device that positions the first grid of the electron gun assembly and the cutter attached to the welding electrode at a predetermined interval; 411. An electron gun assembly device comprising: a chain electrode for welding a cathode positioned at the welding electrode to a holding member on the electron gun assembly side in cooperation with the welding electrode. (2) The tray was configured to move at a neat pitch in the direction perpendicular to the arrangement of the cathodes, and the cathode transfer mechanism was designed to always hold the cathodes at the same position on the tray. An electron gun assembly apparatus according to claim 1, wherein the above is characterized as feature 1III. (3) As a positioning device, there is a single grid and a can.
A predetermined interval (o
, Δ0 and the same serious damage @*v**t, tada-, is configured to be movable along the straight line, holds the electron gun structure, and its spear 1 grid touches the opposite inner surface of the dummy. The position of the spear 1 and the position of the spear 2 where the grid is close to the cathode Km attached to the S ground electrode, and the movable stage of the spear that can be displaced respectively, and the straight line #cfa on the moving stage of the spear 1. The electron beam passing hole of the first grid is movably provided, and the moving table of the spear 2 holds a constant air nozzle facing the dummy or cathode, and the back pressure of the air nozzle h allows the electron beam to pass through the electron beam passage hole of the first grid. Mu 1 converter that generates an electrical signal according to the distance of , and electricity 4 from this Mu
Using I4#, a command is given to the moving base 2 to set the distance between the tip of the air nozzle and the dummy Takaji Okazawa to a predetermined value, and the cathode attached to the tip of the air nozzle and the ** electrode are given a command to move. In order to set the distance between The electron gun assembly device described in Section 2. (4) As a positioning device, a guard is used which has a mechanism for moving the electron gun assembly to the side-by-side arrangement 111 of the guns in the field by an amount corresponding to the mounting pitch. The electron gun assembly device according to any one of Items 1 to 3.