JPH05282998A - Positioning method for cathode ray tube and apparatus for it - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a cathode ray tube positioning method and apparatus capable of highly accurately positioning a cathode ray tube with a simple structure and significantly improving the inspection accuracy of the mounting bracket position. With the goal. According to the cathode ray tube positioning method of the present invention, the cathode ray tube 1 mounted on a panel surface supporting stage 12 is
X- that holds the long and short sides of the panel from four directions, front, back, left and right
Positioning is performed by the Y positioning mechanism 25, then the positioning is released, and the CRT is moved by the stage drive means to the Z point receiver that supports the virtual reference point (Z point) on the surface of the panel 1a, and the funnel is pressed. The above object can be achieved by bringing 21 into contact with the reference line of the funnel 1b of the cathode ray tube and operating the XY positioning mechanism again to perform positioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube positioning method and apparatus suitable for use when inspecting fittings fixed to four corners of a reinforcing band that is fastened to the side surface of a cathode ray tube panel.

[0002]

2. Description of the Related Art Generally, since the inside of a cathode ray tube is a high vacuum, as shown in FIGS. 3 (a) and 3 (b), the cathode ray tube 1 is used for the purpose of preventing implosion and glass scattering at the time of implosion.
The reinforcing band 2 is fastened to the side surface of the panel 1a. In order to attach the cathode ray tube 1 to a supporting portion of a television set or the like, L-shaped attachment fittings 3 having attachment holes for fixing the set are fixed to the reinforcing band 2 at four corners.
The position of the mounting bracket 3 is from the plane dimensions (A), (B), (C) of the center of the mounting hole and the reference point (Z point) 4 on the panel surface of the cathode ray tube 1 to the lower surface of the mounting bracket 3. It is specified by the height dimension (Z).

Conventionally, as an apparatus for automatically inspecting the position of the fitting 3, there is one as shown in FIG. This is to move the cathode ray tube 1 placed on the panel surface supporting stage 7 with the surface of the panel 1a facing downward to the reference position by using the positioning pins 6 arranged around the side surface of the panel 1a. Reference point (Z point) 4 on surface 1a is Z point receiver 5
Position it so that it is in the position relative to. Then, the panel surface support stage 7 is moved down, and the reference point (Z point) 4 of the cathode ray tube 1 is in contact with the Z point receiver 5, and the position of the mounting bracket 3 is measured by using a measuring device (not shown). Is measured, and the data output from the measuring device is processed to judge pass / fail. Since the measurement accuracy of the position of the mounting bracket 3 at this time largely depends on the position accuracy of the cathode-ray tube 1, highly accurate positioning is required.

Generally, as in FIG. 4, in order to position the cathode ray tube 1 mounted on the pin supporting the surface of the panel 1a, a positioning method as shown in FIGS. 5 and 6 is adopted. In the conventional example shown in FIG. 5, the positioning plate 9 provided facing the four sides of the panel 1a of the cathode-ray tube 1 moves forward, backward, leftward and rightward, and the positioning pin 8 provided on the positioning plate 9 is moved.
However, the cathode ray tube 1 is positioned at the reference position by pushing the side surface of the panel 1a. The positioning plate 9 has a mechanism in which plates facing each other on long sides and short sides are connected by levers, rods or the like (not shown) to move the same amount toward the center of the apparatus. Further, in the conventional example shown in FIG. 6, one corner of the side surface of the panel 1a is sandwiched and two sides are set as a reference, and the positioning pin 10 is brought into contact with three reference points (alignment points) on the panel 1a or the funnel side surface. , The positioning pin 11 on the opposite side is operated to position the cathode ray tube 1.

However, in any of the above-mentioned conventional techniques, when the cathode ray tube 1 is supported on the lower side of the panel 1a surface, since the surface of the panel 1a is spherical, the Z point receiver 5 is the panel as shown in FIG. CRT 1 even if it supports the surface
The vertical axis of may be slightly inclined (θ in the figure).

In particular, in the case of a small tube, since the spherical surface R of the surface of the panel 1a is small, a measurement error sometimes becomes large when measuring the height dimension Z of the mounting bracket 3. or,
Recently, the automation of the line has progressed, and the transfer is performed on the device by an automatic transfer machine. However, if the transfer accuracy is poor,
Accurate positioning may not be possible with a single positioning. If the positioning device is provided on the automatic transfer machine side, problems such as large-sized transfer head, increased weight, and increased cost will occur. Further, on the user side, automation of assembling of a television set and the like is progressing, and the standard of the position dimension of the mounting bracket 3 tends to become stricter year by year, so that it is necessary to measure with high accuracy.

[0007]

As described above, in the past, when positioning the cathode ray tube, only the positioning in the XY direction was performed, so that accurate measurement can be performed when the vertical axis of the cathode ray tube is tilted. There was nothing. Also, since positioning is performed only once, it is easily affected by transfer accuracy,
If the transfer accuracy is poor, accurate positioning may not be achieved.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cathode ray tube positioning method and apparatus capable of accurately positioning a cathode ray tube transferred under a panel surface with a simple structure. To do.

[0009]

According to the present invention, a cathode ray tube mounted on a panel surface supporting stage is provided with
Positioning is performed by an XY positioning mechanism that holds the short sides from four directions of front, rear, left and right, and then the positioning is released, and the CRT is supported by the stage drive means at a virtual reference point (point Z) on the panel surface. This is a method for positioning a cathode ray tube in which the funnel holder is moved to the Z point receiver, the funnel retainer is brought into contact with the reference line of the funnel of the cathode ray tube, and the XY positioning mechanism is operated again to perform positioning.

The present invention also provides an XY positioning mechanism for holding the long and short sides of the panel of the cathode ray tube from four directions of front, rear, left and right, and a panel surface supporting stage for supporting the panel surface at a plurality of points. Stage driving means for vertically driving the panel surface supporting stage, and a virtual reference point (Z point) on the panel surface
And a Z-point receiver that supports the cathode ray tube, and is provided with a funnel retainer that abuts on the reference line of the funnel of the cathode ray tube and vertically supports the center axis of the cathode ray tube.

[0011]

According to the apparatus of the present invention, in addition to the XY positioning mechanism for positioning the long side and short side of the panel of the cathode ray tube from four directions of front, rear, left and right, the center of the cathode ray tube is brought into contact with the reference line of the funnel of the cathode ray tube. Since the shaft is supported vertically and the funnel retainer that presses the cathode ray tube against the Z point receiver with a constant pressure is provided, the positioning accuracy can be improved.

According to the method of the present invention, after the first positioning is performed by the XY positioning mechanism on the panel surface supporting stage of the transferred cathode ray tube, the cathode ray tube is placed on the Z point receiver. Is moved to perform the second positioning by the XY positioning mechanism. That is, since the positioning is performed twice in total, highly reliable positioning can be performed even if the transfer accuracy is poor.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

First, the cathode ray tube positioning apparatus according to the present invention is constructed as shown in FIG. 1 (front view) and FIG. 2 (perspective view), and a panel surface supporting stage 12 is provided on a base 26. ing. This panel surface support stage 12
Is slidable up and down by a motor 14 via a guide 13, and a plurality of support pins 24 for supporting the cathode ray tube 1 transferred onto the apparatus are provided in a protruding manner. Of course, this support pin 24 can also slide up and down together with the panel surface support stage 12. Also, the panel surface support stage 1
When the panel surface supporting stage 12 descends around the periphery of 2, the cathode ray tube 1 is supported by contacting with four reference points (Z points) of the panel 1a surface, and the Z point capable of vertical position adjustment. A receiver 15 is provided. Furthermore, the panel surface support stage 1
2 and the height position of the Z point receiver 15 are the panel surface supporting stations.
Even if the cathode ray tube 12 is lowered and the cathode ray tube 1 is moved onto the Z-point receiver 15, the cathode ray tube 1 is in a positional relationship of only descending by about 3 mm. Each is a panel surface support stage 12
XY positioning mechanism (horizontal positioning mechanism) 2 which has exactly the same positioning on the Z point receiver 15
This is because it is performed in step 5.

Next, the XY positioning mechanism 25 will be described. The XY positioning mechanism 25 includes a base 26.
A positioning plate 1 is provided at four opposing positions so as to surround the panel surface supporting stage 12 and the Z point receiver 15 and is disposed so as to face four sides of the cathode ray tube 1.
Have six. On the positioning plate 16 is provided a positioning pad 17 having a spherical tip end portion which is slidable in all directions and whose position can be adjusted forward and backward.
The positioning plate 16 is mounted on a slider 18 with a built-in cylinder in which a sliding base, a guide shaft and a cylinder are integrated so that the positioning plate 16 can slide back and forth. The positioning plates 16 facing the long side and the short side of the panel 1a of the cathode ray tube 1 are connected by a lever 19 and a rod 20 shown in FIG. 2 and moved by an equal amount toward the apparatus center. It is a mechanism to do.

A funnel holder 21 for vertically positioning the funnel 1b of the cathode ray tube 1 is provided on the base 26. The funnel retainer 21 is arranged outside the outer peripheral portion of the target cathode ray tube 1 in consideration of the relationship with the automatic transfer machine, and is moved forward and backward with respect to the device center by the cylinder built-in slider 22 and the cylinder built-in slider 23. Thus, the structure is such that the funnel retainer 21 is brought into contact with the reference line of the funnel 1b of the cathode ray tube by sliding vertically on the device center. The pressing pressure at this time can be adjusted by a regulator.

Now, using the apparatus as described above,
A method of positioning the cathode ray tube will be described.
First, the CRT 1 mounted on the panel surface support stage 12 is positioned by the XY positioning mechanism 25 by a transfer device (not shown). That is, when the slider 18 is driven, the positioning plate 16 mounted on the sliding base advances toward the apparatus center,
Hold the cathode ray tube 1. In this state, the cathode ray tube 1 is positioned almost at the center position of the apparatus.

Next, the positioning plate 16 is retracted to release the positioning, and the vertical driving motor 14 is operated to lower the panel surface supporting stage 12. When the panel surface supporting stage 12 descends, the cathode ray tube 1 on the supporting stage 12 also descends, and the panel 1a surface and the Z point receiver 1
5 abuts. The panel surface support stage 12 further descends and stops in a state of being separated from the panel 1a surface. here,
The slider 22 is operated to move the funnel retainer 21 to the center of the apparatus. Then, the slider 23 is further driven to lower the funnel retainer 21 to bring it into contact with the reference line of the funnel 1b, and the cathode ray tube 1
While holding the center axis of the cathode ray tube vertically, the CRT 1 is pressed against the Z point receiver 15 by applying a light pressure.

Next, while the cathode ray tube 1 is being held by the funnel holder 21, the XY positioning mechanism 25 is operated to perform the second positioning, and the cathode ray tube 1 is held by the slider 18 for measurement (not shown). The position of the mounting bracket 3 is inspected by the device.

[0020]

According to the present invention, when positioning, X
In addition to the positioning in the -Y direction, the tilt of the vertical axis can be corrected. Since the positioning in the XY directions is performed twice, the positioning can be performed with high reliability even when the transfer accuracy is poor, and the cost of the transfer device can be reduced. Also, X
Since the -Y positioning mechanism 25 performs the first and second positioning using the same mechanism, the simple structure does not increase the cost.

From the above, the cathode ray tube can be positioned with high precision by a simple structure, so that the inspection accuracy of the mounting bracket position can be remarkably improved, which in turn contributes to the stabilization of the quality.

[Brief description of drawings]

FIG. 1 is a front view showing a CRT positioning device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

3A and 3B are a side view and a front view showing a general CRT.

FIG. 4 is a front view showing an apparatus for automatically inspecting the position of a fitting in a conventional cathode ray tube.

FIG. 5 is a plan view showing a conventional positioning device for a cathode ray tube.

FIG. 6 is a plan view showing another conventional positioning device for a cathode ray tube.

[Explanation of symbols]

1 ... CRT, 1a ... Panel, 1b ... Funnel, 2
... Reinforcing band, 3 ... Mounting bracket, 12 ... Panel surface support stage, 13 ... Guide, 14 ... Vertical drive motor, 15 ...
Z point receiver, 16 ... Positioning plate, 17 ... Positioning pad, 18, 22, 23 ... Slider, 21 ... Funnel holder, 25 ... XY positioning mechanism,

Claims (2)

[Claims] 1. A CRT mounted on a panel surface support stage is positioned by an XY positioning mechanism that holds the long and short sides of the panel from four directions of front, rear, left and right, and then the positioning is released. , By the stage driving means, the cathode ray tube is moved to a Z point receiver that supports a virtual reference point (point Z) on the panel surface, and the funnel retainer is brought into contact with the reference line of the funnel of the cathode ray tube. A cathode ray tube positioning method characterized by activating the XY positioning mechanism again to perform positioning. 2. An XY positioning mechanism for holding the long and short sides of the panel of the cathode ray tube from four directions of front, rear, left and right, a panel surface support stage for supporting the panel surface at a plurality of points, and this panel surface support. A cathode ray tube positioning device comprising a stage driving means for vertically driving a stage and a Z point receiver for supporting a virtual reference point (Z point) on the panel surface. A cathode ray tube positioning device comprising a funnel retainer which is in contact with a line and vertically supports the center axis of the cathode ray tube.