JPH07296723A - Device for holding elastic supporting body in picture tube assembling device - Google Patents

Abstract

PURPOSE:To enable an elastic supporting body to be held in the reference position of a dummy pin irrespective of materials used for the elastic supporting body. CONSTITUTION:A device is for holding an elastic supporting body 3 while fitting an attaching hole around a dummy pin 5 having a tip form watching the mask attaching pin of a picture tube panel. This device is provided with a holding arm 18 for pressing and holding the elastic supporting body 3 to and on the rear end side of the dummy pin 5 in a state where the attaching hole of the elastic supporting body 3 is fitted around the tip part of the dummy pin 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for holding an elastic support while fitting an attachment hole of the elastic support at the tip of a dummy pin when the elastic support is welded to a frame of a shadow mask. It is about.

[0002]

2. Description of the Related Art Among the currently used color picture tubes, particularly those of the shadow mask type have a predetermined distance (currently about 10 mm) from the fluorescent screen of the picture tube panel.
A thin metal plate called a shadow mask with a large number of round holes or square holes regularly formed is attached. In the Trinitron picture tube, a metal mask with a large number of vertical slits is used.
This type of shadow mask is called an aperture grill.

As shown in FIG. 5, a shadow mask 1 made of a thin metal plate is attached to a frame 2 having a substantially rectangular shape. Elastic supports 3 are attached to the respective sides of the frame 2. These elastic supports 3 are for detachably attaching the shadow mask 1 to a picture tube panel (not shown), and the mask mounting pins 4 are attached to the picture tube panel in correspondence with the mounting positions of the elastic supports 3. It is provided. On the other hand, the elastic support body 3 attached to the frame body 2 of the shadow mask 1 is provided with an attachment hole 3a which can be inserted into and removed from the mask attachment pin 4. Then, the shadow mask 1 can be mounted on the picture tube panel via the elastic support body 3 by fitting the mounting holes 3a of the elastic support body 3 into the mask mounting pins 4 on the picture tube panel side. There is.

In the current picture tube assembly process, in many cases, each elastic support 3 is fixed to the frame 2 of the shadow mask 1 by spot welding.
During the welding operation, it is necessary to hold the elastic support 3 under the same conditions as when the mounting holes 3a are fitted in the mask mounting pins 4 of the picture tube panel. Conventionally, when holding the elastic support body 3 during welding, as shown in FIG.
A dummy pin 5 having a tip shape corresponding to the mask mounting pin 4 of the picture tube panel is used. At the tip of the dummy pin 5, a reference position (reference line) L in which the shape and dimensions of the mask mounting pin 4 are mechanically transferred is virtually set. Therefore, the mounting hole 3a of the elastic support 3 is fitted to the tip of the dummy pin 5, and in this state, the elastic support 3 is moved to the reference position L of the dummy pin 5 by the magnetic attraction force of the magnet 6.
I was trying to hold it.

[0005]

However, in the above-mentioned conventional holding device for the elastic support body, it is a prerequisite that the elastic support body 3 is a magnetic material such as a bimetal, and the elastic support 3 is elastic in view of the structural specifications of the picture tube. If the support 3 is a non-magnetic material, it cannot be held.

The present invention has been made in order to solve the above-mentioned problems, and the elastic support member is provided at the reference position of the dummy pin regardless of the material of the elastic support member (whether it is magnetic or non-magnetic). The purpose is to be able to hold.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and an elastic support having a mounting hole that can be inserted into and removed from a mask mounting pin of a picture tube panel is provided in a shadow mask. In a picture tube assembling apparatus that welds to a frame body, this is a device for holding an elastic support body while fitting a mounting hole into a dummy pin having a tip shape corresponding to a mask mounting pin. The holding arm for pressing and holding the elastic support member to the rear end side of the dummy pin in a state of being fitted to the tip end portion of the.

Further, the holding arm is configured to press and hold the elastic support while abutting on the axis of the mounting hole which is parallel to the short side direction of the elastic support.

[0009]

In the elastic support holding device of the present invention, the elastic support fitted to the tip of the dummy pin is pushed toward the rear end of the dummy pin by the support arm, so that the mask mounting pin of the picture tube panel is secured. The elastic support is positioned and held at the reference position of the corresponding dummy pin.

Further, the elastic support is pressed and held while the holding arm is in contact with the axis of the mounting hole that is parallel to the short side direction of the elastic support, so that the elastic support has the fulcrum position on the axis. The elastic support can be welded to the frame body of the shadow mask without restraining the swinging motion of the.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. In the present embodiment, for convenience of explanation, the same components as those in the above-mentioned conventional example are designated by the same reference numerals. FIG. 1 is a schematic configuration view showing an embodiment of a holding device for an elastic support in a picture tube assembling apparatus according to the present invention, in which (a) is a front view and (b) is a side view thereof. Shows.

In FIG. 1, a dummy pin 5 having a tip shape corresponding to a mask mounting pin of a picture tube panel (not shown).
Are fixed to the support block 11 by fastening nuts 10 and the like. The support block 11 is fixed to the tip portion of the base plate 12. A pneumatic slide guide table 13 is fixed to the rear end of the base plate 12, and a movable block 14 is movably mounted on the slide guide table 13. further,
A pneumatic rotary actuator 15 is mounted on the movable block 14.

The output shaft of the rotary actuator 15 is connected to the rear end of the support shaft 17 via a joint member 16. A holding arm 18 is pivotally attached to the tip of the support shaft 17. Support shaft 17
Is supported by a support block 11 in parallel with the dummy pin 5 via a bearing member (not shown) or the like, and is rotated by the drive of the rotary actuator 15 and is moved in the axial direction by the drive of the slide guide table 13. ing.

Here, a feature of the present invention is that in the holding device for holding the elastic support body 3 while fitting the mounting hole into the mask mounting pin of the picture tube panel, the holding arm 18 described above is used. It is a prepared point. Since the holding arm 18 is pivotally attached to the tip end portion of the support shaft 17 as described above, it operates integrally with the support shaft 17. That is, when the support shaft 17 rotates by driving the rotary actuator 15, the holding arm 18 also rotates integrally with the support shaft 17. Also, slide guide table 1
When the support shaft 17 is moved in the axial direction by driving 3, the holding arm 18 is also moved integrally with this. At this time, since the supporting shaft 17 and the dummy pin 5 are arranged in parallel, the holding arm 18 also moves in the axial direction X of the dummy pin 5.

Explaining further in terms of shape, the holding arm 18 is notched at its tip end portion corresponding to the tip end shape of the dummy pin 5, and when the elastic support body 3 is held, the holding arm 18 is cut by the notch portion. Positional interference with the dummy pin 5 is avoided. When the rotary actuator 15 is driven to rotate, the rotary actuator 15 is configured to rotate on the side opposite to the side where the cutout is formed, that is, in the θ direction in the drawing. Further, a ridge portion 18a (see FIG. 2) having a substantially triangular cross section is formed at a tip portion of the holding arm 18 facing the support block 11, and the ridge portion 18a is vertically arranged with the cutout portion therebetween. Each is provided.

On the other hand, a stopper member 19 is fixed to the side surface of the support block 11. This stopper member 1
9 is in contact with the lower side of the elastic support body 3 in a state where the mounting hole 3a of the elastic support body 3 is fitted to the tip end portion of the dummy pin 5 and thereby the movement of the elastic support body 3 in the rotating direction in the fitted state. It regulates.

Next, the operation of the elastic support holding device having the above structure will be described. First, at the start of the operation, the holding arm 18 is moved in the axial direction X of the dummy pin 5.
Stands by at a position separated from the dummy pin 5, that is, at a retracted position shown by a chain double-dashed line in FIG. Further, at the retracted position, the holding arm 18 is in a state of falling in the θ ₁ direction as shown by the chain double-dashed line in FIG.

Under such an initial state, the elastic support body 3 is supplied to the dummy pin 5 by a component supply device (not shown). At this time, the elastic support body 3 is sandwiched by a component supply device (not shown), and the mounting hole 3a is fitted to the tip portion of the dummy pin 5. At that time, since the tip portion of the holding arm 18 is sufficiently retracted with respect to the tip position of the dummy pin 5, the component supply device and the holding arm 18 are positioned when the elastic support body 3 is fed to the dummy pin 5. Do not interfere with each other.

When the elastic support body 3 is supplied to the dummy pin 5 in this way, the holding arm 18 rotates together with the support shaft 17 by driving the rotary actuator 15.
At this time, the holding arm 18 rotates in the direction of θ ₂ shown in FIG. 3, whereby the holding arm 18 stands up and the tip of the dummy pin 5 is placed in the notch. At this time, since the holding arm 18 is separated from the dummy pin 5, the elastic support body 3 is held by the component supply device (not shown).

Next, the movable block 14 and the rotary actuator 1 are driven by driving the slide guide table 13.
5 and the support shaft 17, the holding arm 18 moves in the axial direction X of the dummy pin 5. That is, the holding arm 18 is, as shown in FIG.
By the drive of 3, the retracted position shown by the two-dot chain line in the figure moves to the holding position shown by the solid line in the figure.

At this time, the protrusion 8a of the holding arm 18
3, as shown in FIG. 3, the elastic support 3 is brought into contact with the elastic support 3 at the axis K of the mounting hole 3a parallel to the short side direction of the elastic support 3, and is elastically supported by the driving force of the slide guide table 13 as it is. The body 3 is pressed to the rear end side of the dummy pin 5.
As a result, the elastic support 3 is reliably positioned and held at the reference position L of the dummy pin 5 corresponding to the mask mounting pin of the picture tube panel (not shown), as shown in FIG. In this state, the movement of the elastic support body 3 about the dummy pin 5 as a pivot in the rotation direction causes the stopper member 1 to move toward the lower side of the elastic support body 3.
It is regulated by the contact of 9.

At this point, the elastic support 3 is released from the sandwiched state of the component supply device. Further, before the elastic support body 3 is held by the holding arm 18, the shadow mask (not shown) is supplied and positioned.

Then, by driving a slide unit (not shown), the entire apparatus advances together with the base plate 12,
As a result, as shown in FIG. 4, the joining piece 3b of the elastic support 3 is
Is a holder 20 provided on the frame body of the shadow mask, for example.
Is located near the. Then, as shown in FIG.
The counter electrode 21 of the welding machine advances from both the elastic support 3 side and the holder 20 side, and the elastic support 3 and the holder 2 as they are.
0 and 0 are sandwiched by a predetermined pressing force. At this time, the protrusion 8a of the holding arm 18 presses and holds the elastic support 3 while abutting on the axial line K of the mounting hole 3a, so that the above-mentioned axial line K
Since the swinging motion of the holding arm with the fulcrum position as the fulcrum position is not restricted, the elastic support body 3 and the holder are sandwiched by the opposing electrode 21 without applying an unreasonable force to the fitting portion between the dummy pin 5 and the elastic support body 3. It is possible to closely contact with 20.

When a current is applied to the counter electrode 21 while the elastic support 3 and the holder 20 are in close contact with each other in this manner, the joining piece 3b of the elastic support 3 is moved to the holder 2 by the local heating action.
Welded to zero. Incidentally, the joint piece 3b of the elastic support 3
The welding location between the holder 20 and the holder 20 is appropriately set in consideration of the welding strength of the elastic support 3 with respect to the frame body of the shadow mask, and accordingly, the joining piece 3b and the holder 20 are provided over one location or a plurality of locations accordingly. Spot welding with is done.

When the welding of the elastic support 3 is completed in this way, the holding arm 18 is separated from the elastic support 3 by driving the slide guide table 13 and retracted from the dummy pin 5 (the position shown by the chain double-dashed line in FIG. 2). ). Further, the holding arm 18 is again tilted in the θ ₁ direction (FIG. 3) by driving the rotary actuator 15. In this state, the slide unit (not shown) is driven to retract the entire apparatus together with the base plate 12 from the shadow mask (not shown), and returns to the state before the operation is started again. After that, the elastic support body 3 is welded to the frame body of the shadow mask to be supplied next according to the same procedure as above.

[0026]

As described above, according to the present invention,
By holding the elastic support fitted to the tip of the dummy pin toward the rear end of the dummy pin by the holding arm, the elastic support is held in the specified position. Any body can be held without any trouble.

Further, the holding arm is brought into contact with the axis of the mounting hole parallel to the short side direction of the elastic support to press and hold the elastic support, whereby the fitting portion between the dummy pin and the elastic support is fitted. The elastic support can be welded to the frame body of the shadow mask without applying excessive force to the. Therefore,
When the shadow mask is mounted by fitting the mounting hole of the elastic support member to the mask mounting pin of the picture tube panel, the shadow mask can be mounted on the picture tube panel with high accuracy.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a holding device for an elastic support according to the present invention.

FIG. 2 is a diagram (No. 1) for explaining the device configuration and operation.

FIG. 3 is a diagram (part 2) explaining the device configuration and operation.

FIG. 4 is a diagram illustrating a holding state during welding.

FIG. 5 is a diagram illustrating a structure of a shadow mask.

FIG. 6 is a diagram illustrating a conventional device.

[Explanation of symbols]

 1 Shadow Mask 2 Frame 3 Elastic Support 4 Mask Mounting Pin 5 Dummy Pin 18 Holding Arm

Claims (3)

[Claims] 1. A picture tube assembling apparatus for welding an elastic support body having a mounting hole that can be fitted into and removed from a mask mounting pin of a picture tube panel to a frame body of a shadow mask, and a tip shape corresponding to the mask mounting pin. A device for holding the elastic support body while fitting the mounting hole into a dummy pin that forms the elastic support body in a state where the mounting hole of the elastic support body is fitted to a tip end portion of the dummy pin. A holding device for an elastic support body, comprising a holding arm for pressing and holding the dummy pin on the rear end side. 2. The holding arm presses and holds the elastic support while abutting on the axis of the mounting hole that is parallel to the short side direction of the elastic support.
Device for holding the elastic support described. 3. The holding arm is movably supported between a holding position located at the tip of the dummy pin in the axial direction of the dummy pin and a retracted position separated from the dummy pin by a predetermined distance. The device for holding an elastic support according to claim 1.