JPH0630223B2 - Position adjustment device for shadow mask of color cathode ray tube - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention automatically fits a shadow mask (hereinafter referred to as a mask) on a panel when a fluorescent surface is formed on the inner surface of the panel in the process of manufacturing a color cathode ray tube. The present invention relates to a mask position adjusting device used for a device (hereinafter referred to as a panel / mask fitting device).

[Technical Background of the Invention] In the process of manufacturing a color cathode ray tube, a panel and a mask are generally combined by fitting three panel pins with holes of a mask holder in a small tube (15 V or less).
In a large tube (17V or more), four panel pins are fitted with holes of a mask holder.

Of these, the automatic fitting device for the 3-pin panel and the mask is realized by the rotary type 4-head 4-position device, but the fitting of the 4-pin panel and the mask is done by the operator. The reality is that it is done manually. As a result, there is a problem in that mass production is hindered, and dust generated by an operator adheres to the fluorescent surface to deteriorate the quality and yield of the color CRT.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a completely automated mask position adjusting device that can be used in a panel / mask fitting device using four shafts. To do.

[Summary of the Invention] A position adjusting device for a shadow mask of a color cathode ray tube according to the present invention includes a mounting table for horizontally mounting the shadow mask of the color cathode ray tube supplied by a supply device, and the mounting table mounted on the mounting table. A coarse position adjusting device that roughly adjusts the position of the mask in a horizontal plane within a range that allows for manufacturing dimensional error, and a top part formed at a position corresponding to the mask holder hole on the lower side of the coarse position adjusted mask holder For pushing up a flat chevron groove to perform positioning in the height direction, the mask pushing up having an engaging member that engages with the flat portion of the chevron groove portion, which is formed of a chevron portion with an inclination angle smaller than the inclination angle of the chevron groove. And a reference pin sliding device for finely adjusting the mask by inserting reference pins into the mask holder holes of the mask held by the push-up device. It is characterized by a door.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view showing the whole of a panel mask fitting device using a shadow mask position adjusting device for a color cathode ray tube according to the present invention, the main parts of which are a panel position adjusting device 1 and a mask position adjusting device. 2, panel chuck device 3,
The panel mask chuck device 4 and the transfer device 5 are included.

This panel / mask fitting device panel position adjusting device 1
Adjusts the position of the supplied panel, the mask position adjusting device 2 adjusts the position of the supplied mask, and the panel chuck device 3 sucks the panel adjusted in position by the panel position adjusting device 1 and conveys it. The device 5 conveys the panel and the mask to the mask position adjusting device 2, the fitted panel and the mask are held by the panel / mask chuck device 4, and the conveying device 5 conveys them to the take-out position.

FIG. 2 is a plan view showing an arrangement of main parts of the position adjusting device 2 for the shadow mask of the color cathode ray tube according to the present invention.

The mask position adjusting device 2 includes a mask mounting table 1 on which a mask M supplied from a mask supply device (not shown) is mounted.
02, a coarse position adjusting mechanism 103 for adjusting the position of the mask placed on the mask placing table 102, and a mask pushing-up mechanism for pushing up the mask M coarsely adjusted by the rough position adjusting mechanism 103 to a predetermined height. An accurate position in the X-, Y-, and Z-axis directions by fitting a reference pin having a tip end formed in the shape of the panel pin PP into the mask holder hole of the mask M pushed up by the mask push-up mechanism 104. A reference pin sliding mechanism 105 for adjusting is provided.

Further, this mask position adjusting device uses the following mechanism when the mask is assembled to the panel.

That is, the mask holding mechanism 106 that holds the mask position by holding the inside of the mask frame of the mask M whose position is adjusted by the reference pin sliding mechanism 105, and the mask M held by the mask holding mechanism with the panel P. A holder opening / closing mechanism 107 for closing the so-called holder, which moves four mask holders fixed to the mask frame to the frame side for fitting preparation, and a holder for the holder opening / closing mechanism 107 for fitting the mask M on the panel P. The holder intermediate stop mechanism 108 for opening and stopping the panel P just before coming into contact with the inner surface of the panel P, and the panel P on which the mask M is fitted are removed from the panel chuck device 3 shown in FIG. The panel and the mask are fitted and inserted by the panel support mechanism 109 that supports the panel P while sandwiching.

The specific configuration and operation of the shadow mask position adjusting device for a color cathode ray tube according to the present invention will be described below.

As shown in FIGS. 2 and 3, the mask mounting table 102 is composed of eight spacers 112 arranged on the upper surface of the table 111 in the vicinity of the corners of the mask frame so as to cross the mask frame. Support M.

As shown in FIGS. 2, 4, and 5, the coarse position adjusting mechanism 103 includes four guide units 121 appropriately arranged on the upper surface of the table 111 and the guide unit 1.
21. Each pusher fitting 122 guided by each of the guides 21 slides back and forth, the V-shaped plate 123 fixed to the upper surface of the tip of the pusher mounting 122, and the V-shaped plate 123 rotatably in the vicinity of the tip. Two pusher rollers 1 mounted on the shaft
24 and the arm 1 projecting from the pusher fitting 122
25, and a stopper 126 fixed to the table 111 that contacts the arm 125 and sets the forward movement position of the pusher roller 124.

The pusher roller 124 is moved back and forth by a pusher fitting 122 which is connected to a cylinder 127 pivotally attached to the table 111 and is slid back and forth, and a mask is formed at the forward end of the pusher roller 124 so as to sandwich each corner of the mask frame. Position the frame. The distance between the pusher roller 124 and the side surface of the mask frame is set by a stopper 126 so as to keep the estimated dimensional error of ± 1 mm in manufacturing the mask at about 1.5 mm.

That is, the coarse position adjustment mechanism 103 adjusts the coarse position of the mask M on the mask mounting table 102 with an accuracy of about 1.5 mm in the horizontal plane.

As shown in FIGS. 2 and 6 to 8, the mask lifting mechanism 104 includes four brackets 131 arranged on the lower surface of the table 111 so as to correspond to the position of the mask holder MH of the mask M. A guide rod 132, which is guided vertically by a rectangular groove formed in each of the brackets 131 and slides up and down to vertically penetrate the table 111, and a block 133 fixed above the guide rod 132.
An L-shaped lever 134 rotatably attached to the block 133 and having a vertical portion smaller than the width of the block 133, and an L-shaped lever 134 protruding and fixed to both upper side surfaces of the block 133. Two plates 135 and 136 for limiting the rotation of the L-shaped lever 134, a stepped hole 137 formed near the lower end of the L-shaped lever 134, and the stepped hole 137.
The L-shaped lever 1 is inserted between the plate 136 and the plate 136.
Spring 138 for pressing 34 onto the plate 135
It is composed of The guide rod 132 is lifted by a cylinder 139 which is vertically fixed below the bracket 131 and whose tip is connected to the guide rod 132.
The L-shaped lever 134 moves up through the block 133,
The chevron portion F formed at the end of the horizontal portion of the shaped lever 134
However, a width of about 1 mm is formed in the center formed on the lower surface of the mask holder MH while maintaining a certain relation position with the hole H of the mask holder MH.
The mask M is pushed up by being engaged with the chevron-shaped groove R having the flat portion R'of.

Therefore, the mask M is set to a predetermined height (position in the Z direction), and at the same time, the coarse position is adjusted with a positional accuracy of about 1 mm in the X-axis and Y-axis directions.

The flat portion R'provided in the center of the chevron-shaped groove R formed on the lower surface of the mask holder MH is a mask when the mask holder MH is welded while being inclined with respect to the mask frame (however, the hole of the mask holder is in the regular position). Despite the misalignment of the chevron groove R with respect to the hole H of the holder MH, the L-shaped lever 1
This is intended to reduce the displacement of the hole H of the mask holder MH when it is supported by the tip of the chevron portion 34. For the same reason, the angle of inclination of the angled portion of the L-shaped lever 134 is smaller than the angle of inclination of the angled groove of the mask frame. Further, the strength of the spring 138 is stronger than the load for supporting the weight of the mask, but when the mask holder MH is inclined and welded as described later, the position of the chevron groove R changes with respect to the hole H of the mask holder MH. A reference pin described later is fitted in the hole H of the mask holder MH so that the L-shaped lever 134 has a function of escaping downward when the mask M is lowered.

The reference pin sliding mechanism 105, as shown in FIG. 2, FIG. 9, and FIG.
Four guide units 141 properly arranged on the shaft
And a reference pin attachment 142 that is guided by each of the guide units 141 and slides back and forth, and a reference pin attachment 142 that is above the reference pin attachment 142 and is horizontal to the height of the reference position where the hole H of the mask holder MH should be located. A reference pin 143, which has a tip end portion formed into a conical shape similar to the fitting portion of the panel pin PP, and one end of which is linked to the reference pin attachment 142.
A lever 145 connected via 44 to the upper surface of the table 111 so as to be pivotally attached, a cylinder 146 connected to the other end of the lever 145 and attached to the upper surface of the table 111, and the guide unit 141. It is composed of a stopper 147 which is provided in parallel in the vicinity and contacts the protruding portion of the reference pin attachment 142 to set the forward end of the reference pin 143. The reference pin attachment 142 is guided by the guide unit 141 via the link 144 by the lever 145, which is given a turning habit by the forward movement of the cylinder 146, to the position of the panel pin PP planted on the inner surface of the panel P. The tip of the reference pin 143 is fitted into the hole H of the mask holder MH of the mask M pushed up by the mask pushing mechanism 104, and the final position adjustment of the mask M with respect to the X axis, the Y axis, and the Z axis is performed.

Hereinafter, a specific configuration and operation of assembling the shadow mask and the panel thus adjusted in position will be described.

As shown in FIGS. 2 and 11, the mask gripping mechanism 106 includes four brackets 152 that are appropriately arranged on the upper surface of a base plate 151 that supports the table 111 by columns (not shown), and the brackets. 152
A lever 153 which is rotatably disposed on each of the above-mentioned members and swings in a vertical plane parallel to the Y-axis shown in FIG.
154 fixed to the upper side of the mask frame and contacting the inner surface of the mask frame, an arm 155 fixed to substantially the center of the lever 155, a cylinder connecting fitting 156 axially attached to the arm 155, and the base plate 151.
A cylinder 158 that is rotatably pivoted above another bracket 157 that is fixedly attached to the cylinder 158, and has the other end connected to the cylinder connection fitting 156 and operated by an independent hydraulic circuit.
It is composed of After the final position adjustment of the X-, Y-, and Z-axes of the mask M is performed, the mask holding mechanism 106 independently opens each lever 153 to slide the outer surface of each chip 154 by the reference pin. The mask 105 is brought into contact with the inner surface of the mask frame of the mask M by the mechanism 105, and then a solenoid valve (not shown) that controls the operation of each of the cylinders 158 described above is closed to close the oil before and after the cylinder in the hydraulic circuit. The state in which the mask M is held is maintained. After this, the reference pin 143 returns to the original position.

The holder opening / closing mechanism 107 is shown in FIG. 2, FIG. 12, and FIG.
As shown in the figure, a shaft 162 which is given a turning habit by a cylinder 161 suspended from the lower surface of the table 111,
A bearing body 163 which vertically penetrates the table 111 to form a Z axis and rotatably supports the Z axis, and the shaft 1.
The flange 164 fixed to the upper surface of 62 and the table 1
Four guide units 165 that are appropriately arranged in parallel on the upper surface of 11 on the X axis and the Y axis orthogonal to the Z axis and in the vicinity of the Y axis, and the X guided by each of the guide units 165. Holder mounting tool 166 that slides along the axis and the Y-axis, a ring 167 that connects the flange 164 and each holder mounting tool 166, and holder mounting tool 1
A holder 168 fixed to the front upper surface of the mask 66 and abutting on the mask holder MH of the mask M gripped by the mask gripping mechanism 106, a lever 169 protruding from the flange 164, and a holder 16 abutting on the lever 169.
8 is constituted by a stopper 170 fixed to a table 111 for setting a closed end. Cylinder 161
As the shaft 162 moves forward, the lever 169 of the shaft 162 stops
The flange 164 is rotated until it abuts 70, and the holder attachment 166 is slid while being guided by the guide unit 165 via the link 167 to close the holder 168, and the inner surface of the holder 168 is the outer surface of the mask holder MH. Press to close the mask holder MH close to the mask frame.

As shown in FIG. 2 and FIG. 14, the holder intermediate stop mechanism 108 guides a bracket 171 appropriately arranged on the lower surface of the table 111 to a square groove vertically formed in the bracket 171 to guide the operation. After the table 111 is vertically penetrated and slid up and down and moved up, when the holder opening / closing mechanism 107 is opened, the holder 169 is set to come into contact with the lever 169 so as to stop at a position just before coming into contact with the inner surface of the panel P. And a cylinder 173 which is connected to a lower portion of the slide rod 172 and vertically fixed to the bracket 171. After the holder 168 of the holder opening / closing mechanism 107 closes the mask holder MH, the cylinder 173 is retracted to raise the slide rod 172, and the panel chuck device 3 shown in FIG. The holder opening / closing mechanism 107 is lowered to a height at which the mask M is fitted to P, and as the slide rod 172 rises.
When the lever 169 comes into contact with the slide rod 172, the mask holder MH closed by the holder 168 is opened by its own spring force, and the panel pin PP planted on the inner surface of the panel P in the hole H of the mask holder MH is opened. Be fitted. That is, the mask holder MH is opened until the hole H of the mask holder MH is fitted to the panel pin PP, but the holder 168 is further opened just before the inner surface of the panel P abuts, and as a result, the contact between the mask holder MH and the holder is released.

The panel support mechanism 109, as shown in FIGS. 2 and 15, is arranged on the upper surface of the table 111.
A block 181 and a slanted surface 1 (eg, a slope 1) that slides up and down by being guided by a rectangular groove vertically formed in each block 181 and abuts a sliding body described later on a part of the side surface. / 10) formed on the panel support 182
A bottomed hole 183 formed in the center of the bottom of the panel support 182, the bottomed hole 183 and the block 181.
It is inserted between the bottom of the square groove and the panel support 182 constantly.
The sliding range of the spring 184 that pushes up the panel support 182 and the long hole LH that is planted on the side surface of the panel support 182 and is formed on the side surface of the block 181 so that the panel support 182 does not pop out. And a pin 185 that restricts the angle of movement of the block 181 are guided by a rectangular groove formed substantially horizontally in the block 181, and slide, and the tip end of the inclined surface I conforms to the inclined surface I formed on the side surface of the panel support 182. ′ Is formed and moved forward to contact the panel support 182 to support it, and a slide body 186 that supports the panel support body 182 and a cylinder 187 that is horizontally fixed and connected to the slide body 186 to slide the slide body 186 back and forth. It is composed of

The panel P sucked by the panel chuck device 3 is a mask M.
When the lower surface of the panel P pushes down the panel support 182 and stops, the sliding body 186 advances by the advance of the cylinder 187 to press the inclined surface I on the side surface of the panel support 182 to support the panel. The height of the body 182 is maintained. That is, since the panel chuck mechanism 3 is supported by the panel support mechanism 109 even when the panel P is released, the holder 168 opened to the inner surface of the panel P just before contact.
And the inner surface of the panel P are prevented from being damaged, and the slidable surfaces 186 and 182 of the sliding member 186 and the panel supporting member 182 are in pressure contact with each other.
Even if the height from the panel P to the lower surface of the panel P is not constant, the panel support 182 is supported in conformity with the load, and the panel support 182 is not displaced even if it receives a load. The panel can be clamped without being raised.

After that, the mask is fitted to the panels P sequentially attracted to the panel chuck device by the holder opening / closing mechanism and the holder intermediate stop mechanism, and the panel P on which the mask is fitted by the mask gripping mechanism is installed from the panel chuck device. It is supported until it is detached and pinched by the panel / mask chuck device.

As is apparent from the above description, the mask position adjusting device according to the present invention roughly adjusts the position of the mask of the color CRT supplied by the supplying device in the horizontal plane within the range in which a dimensional error in manufacturing is taken into consideration, and the coarse position adjustment is performed. While pushing up the chevron-shaped groove formed on the lower side of the panel holder of the formed mask to insert and support the reference pin, the mask is moved a minute distance to guide the mask holder MH to the reference position.
That is, since it is configured to perform stepwise position adjustment,
Even if the mask frame has dimensional variations that cannot be avoided by the current manufacturing technology, or the mask holder MH is tilted and fixed to the mask frame, the position of the mask can be adjusted without fail.

In the mask position adjusting device, the coarse position adjusting mechanism adjusts the coarse position of the supplied mask with an accuracy of about 1.5 mm, and then the mask lifting mechanism adjusts the coarse position with an accuracy of about 1 mm. Mask holder M by moving mechanism
Accurate position adjustment of the X-axis, Y-axis, and Z-axis is performed with reference to the hole H of H.

EFFECTS OF THE INVENTION According to the device of the present invention, since the mask can be accurately adjusted in position, there are advantages such as facilitating the sandwiching of the panel / mask chuck device. It is possible to provide a mask position adjusting device adapted to an automated panel mask fitting device which is the final object.

[Brief description of drawings]

FIG. 1 is a front view of a panel mask fitting apparatus using the panel or mask position adjusting apparatus of the present invention shown for explaining the present invention, and FIG. 2 is a main part of the mask position adjusting apparatus of the present invention. FIG. 3 is a plan view showing the arrangement, FIG. 3 is a side view showing the mask mounting table used in the present invention, FIG. 4 is a plan view showing the rough position adjusting mechanism, FIG. 5 is its side view, and FIG. FIG. 7 is a front view showing a mask lifting mechanism used in the invention, FIG. 7 is an enlarged front view showing an engagement relationship between the mask holder and the mask lifting mechanism, FIG. 8 is a side view showing the mask lifting mechanism, and FIG. FIG. 10 is a plan view showing a reference pin sliding mechanism used in the present invention, FIG. 10 is a side view thereof, FIG. 11 is a side view of a mask holding mechanism used in the present invention, and FIG. 12 is a panel mask using the present invention. A plan view showing a holder opening / closing mechanism of the insertion device,
FIG. 13 is a side view showing a partial cross section thereof, FIG. 14 is a side view showing a holder intermediate stopping mechanism of a panel mask inserting device using the present invention, and FIG. 15 is a panel using the present invention. It is a side view which shows the panel support mechanism of a mask insertion apparatus. 102 ... Mask mounting table 103 ... Coarse position adjusting mechanism 104 ... Mask pushing mechanism 105 ... Reference pin sliding mechanism 106 ... Mask gripping mechanism 107 ... Holder opening / closing mechanism 108 ... Holder intermediate stop mechanism 109 ... Panel Support mechanism 124 …… Pusher roller 143 …… Reference pin 168 …… Holder 182 …… Panel support

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-15743 (JP, A) JP-A-54-147774 (JP, A) JP-A-53-68566 (JP, A) Actual development Sho-54- 166258 (JP, U)

Claims (1)

[Claims] 1. A mounting table on which a shadow mask of a color cathode ray tube supplied by a supply device is horizontally mounted, and the mask mounted on the mounting table is within a horizontal plane within a range in which a dimensional error in manufacturing is taken into consideration. And a coarse position adjustment device that adjusts the coarse position with a rough position adjustment, and the top of the mask that is formed at a position corresponding to the mask holder hole on the lower side of the mask holder of the coarse position is pushed up and the position in the height direction is pushed up. A mask pushing-up device having an engaging member that engages with a flat portion of the chevron-shaped groove formed by a chevron-shaped portion having an angle of inclination smaller than the angle of inclination of the chevron-shaped groove for performing gimbaling; and a mask held by the pushing-up device. Position adjustment of a shadow mask of a color cathode ray tube, characterized in that it is provided with a reference pin sliding device for finely adjusting the mask by inserting panel reference pins into the mask holder holes respectively. Apparatus.