JPS594822B2 - Shadow mask attachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shadow mask mounting device that can automatically attach a shadow mask to a panel or the like during the manufacturing process of a color picture tube.

Generally, during the manufacturing process of color picture tubes, multiple exposure steps are required to form light-absorbing substances and light dots in the three colors of R, G, and B, and each time the panel and shadow mask are removed. need to be combined.

However, in the past, the shadow mask was attached to the panel by manual labor, which had the major drawback of extremely low work efficiency.

Therefore, there is a need for an automatic device that automatically attaches and detaches such a shadow mask and panel.

The present invention has been made in response to the above-mentioned demands, and provides a shadow mask configured to automatically mount a shadow mask that is attached via a spring to a panel pin protruding from the inner surface of the panel of a color picture tube. A mounting device is provided.

Hereinafter, the present invention will be described in detail along with embodiments shown in the drawings.

In the apparatus of the present invention, the shadow mask is supplied via a shadow mask housing jig consisting of a rectangular frame called a dummy panel.

A pin is implanted into this dummy panel and its inner surface at a position that exactly corresponds to a fitting hole drilled in the free end of a leaf spring-like mounting spring whose one end is fixed to the side surface of the shadow mask. , the shadow mask is attached to this pin via the attachment spring.

The device of the present invention is premised on the existence of such a dummy panel.

In the embodiment shown in FIG. 1 and below, the reference numeral 1 denotes a base, and on this base 1, as shown in FIG.
3 are fixed facing each other at regular intervals.

As shown in FIG. 3, an air cylinder 4 is fixed to the supports 2 and 3, and the rod of this air cylinder 4 extends through the upper plate of the supports 2 and 3, and has a guide shaft at its tip. 6,
A lifting platform 5 guided by 7 is fixed.

As is clear from FIG.
A mounting plate 6 is positioned in a fixed state on the mounting plate 3, and pads 7 made of an elastic body such as rubber are fixed to both ends of opposing edges of the mounting plate 6, respectively.

On the other hand, an air cylinder 8 is fixed on the lifting platform 5,
The tip of the rod is linked to an L-shaped positioning mold 10 having a pivot point on a support 9 installed on the lifting platform 5.

As shown in FIG. 1, a guide groove 11 for a panel pin is formed at the tip of the positioning die 10, with the upper end widened.

In addition, a guide pin 12 is implanted between the butts 7 on the opposite end side of the mounting plate 6 to fit into a positioning hole bored in the lower edge of the dummy panel (not shown). has been done.

On the other hand, a support stand 13 is fixed on the base 1 in a state perpendicular to the straight line connecting the pair of support stands 2 and 3 arranged opposite to each other, and the rod of the air cylinder 14 fixed to this support stand 13 is A lifting table 15 that extends through the upper plate of the support table 13 and is guided by a guide rod 16 is fixed to the tip thereof.

An air cylinder 17 is fixed on the lifting table 15, and the tip of the rod is connected to the approximately central part of a substantially U-shaped positioning mold 19 that is rotatably supported on a column 18 installed on the lifting table 15. The links are combined.

As is clear from FIG. 1, a panel pin guide groove 20 whose upper end is widened is also formed at the tip of the positioning mold 19.

Further, in the space formed by the pair of support tables 2 and 3 and the support table 13, an elevating table 23 is arranged which is attached to the substrate 1, is raised and lowered by an air cylinder 21, and is guided by a guide rod 22. .

A positioning plate 25, which is raised and lowered by an air cylinder 24, is fixed on the lifting platform 23, and the positioning plate 25 has markings in at least three positions on its outer surface, that is, in positions facing the panel pins of the panel, as shown in FIG. A positioning piece 26 having a U-shaped groove, a portion of which is shown, is provided to protrude upward.

This positioning plate 25 is normally connected to a guide rod 28 that connects the mask holder 27 and the lifting platform 23 located above the positioning plate 25.
You will be guided up by the.

As shown in FIG. 1, the mask holder 27 has a disc-shaped grooved cam 29 attached to its upper surface.
When the mask holder 27 is rotated by a torque actuator 30 fixed to the lower surface of the mask holder 27, a locking pawl 31 that deflects a mounting spring of the shadow mask expands and contracts in accordance with the rotation angle.

Note that even if the locking pawl 31a on the opposite side of the positioning mold 19 is wide as shown in FIG. 1, it may be narrow as shown in FIG. Either is fine.

Further, as is clear from FIGS. 1 and 2, frame guides 32 made of an elastic material such as rubber are fixed to the four corners of the mask holder 27.

Next, the operation of this embodiment configured as above will be explained.

First, the positioning molds 10 and 19 are at the lower limit of rotation, and the lifting platform 2
3 is at its lower limit, a dummy panel (not shown) accommodates a shadow mask, and is positioned by fitting the guide pin 12 on the mounting plate 6 into the fitting hole formed on its lower end surface. It will be placed.

In this state, the shadow mask (not shown) is accurately positioned by the pins of the dummy panel.

Next, the air cylinder 21 is activated, the lifting platform 23 is raised, the mask holder 27 is also raised, the locking claw 31 is inserted between the dummy panel and the mounting spring attached to the side of the shadow mask, and the torque is The actuator 30 is activated, rotates the grooved cam 29, retracts the locking pawl 31, presses the mounting spring toward the shadow mask, and releases it from the pin of the dummy panel.Then, the air cylinder 21 is activated again and the lifting platform 23 is moved. descends with the shadow mask attached to the mask holder 27.

Thereafter, the dummy panel is removed from the mounting tables 2 and 3 by a transport device (not shown).

The operations up to this point are preliminary operations before the shadow mask mounting operation.

Next, as shown by the symbol P in FIGS. 2 and 3, the mounting plates 2 and 3 are placed in a state in which the panel is roughly positioned by a transport device (not shown) with an accuracy within the operating accuracy of the transport device. It is placed on pad 7 of.

Then, the air cylinders 8 and 17 operate, and the positioning mold 10
, 19 rotates and enters the inside of the panel P, and the panel pin P is inserted into the guide grooves 11 and 20 at the tips thereof as shown in FIG.
By guiding □, the panel P is accurately positioned within the X-Y plane, and then returns to its original state.

Then, the positioning plate 25 is raised by the air cylinder 24 and approaches the mask holder 27, and the positioning piece 26 having the U-shaped notch is aligned with the locking claw 31.

In this state, the mask holder 27 with the shadow mask attached rises together with the lifting table 23 raised by the air cylinder 21, and the positioning pieces 26 sandwich the panel pin P1 of the panel P and position and fix it.

Thereafter, the locking pawl 31 is released, and the shadow mask mounting spring that has been pressed until now is expanded and fitted with the panel pin P1.

After the attachment of the mask to the panel P is completed in this manner, the air cylinders 21 and 24 are activated again, and the lifting platform 23 and the positioning plate 25 return to their original states.

The panel P with the shadow mask attached is transferred to the next process by a transfer device (not shown).

In this way, one cycle of the shadow mask device is completed, and the above cycle is repeated thereafter.

As is clear from the above description, the device of the present invention has a plurality of positioning molds that are implanted on the inner surface of the panel and performs positioning on a plane via panel pins, and a plurality of positioning molds that hold a shadow mask and hold a shadow mask. The mask holder has a locking claw that presses and releases the mounting spring of the mask holder, and a positioning plate that is provided facing the lower side of the mask holder and has a positioning piece that positions the panel when the shadow mask is attached. , it is possible to accurately and automatically attach the shadow mask to the panel, and the efficiency of the shadow mask attaching work is greatly improved.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the device of the present invention, and FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIG. 3 is a side view of the device in an expanded state. 1...Base, 2,3,13...Support stand, 4,8゜14.17,21,24...Air cylinder, 5゜23... ... Lifting platform, 6...
Mounting table, 7...Bat, 10.19...
・Positioning type, IL20...Guide groove, 12...
...Guide pin, 25 ...Positioning plate, 26
...Positioning piece, 27...Mask holder, 29...Groove cam, 30...Torque actuator, 31...Latching claw .

Claims (1)

[Claims] 1. A pair of supports having mounting plates placed a certain distance apart, and another support placed perpendicular to the straight line connecting the pair of supports, each of which is attached to each of these supports. a positioning mold rotated by an air cylinder; and an elevating plate disposed in a space formed by the three support stands so as to be movable up and down by an air cylinder;
A mask holder is mounted on the elevating plate and has a retractable locking pawl that can suppress and release the shadow mask mounting spring, and a positioning piece that faces below the mask holder and is movable up and down. A shadow mask mounting device characterized by comprising a plate.