JPS60189137A - Assembly device of cathode-ray tube - Google Patents

Abstract

PURPOSE:To improve setting accuracy of the captioned cathode-ray tube by performing the rotary angle setting between a bulb and an electron gun while using a graduation line provided on a bulb face as the reference and monitoring an inserting position of the electron gun while using an optical system. CONSTITUTION:A bulb 12 is put on the bulb holding table 35 of a bulb holding mechanism 34 while clamping the neck part 15 with a clamp unit 36. A rotary regulation dial 38 is operated so that the X and Y directions of a graduation line projected on a monitor television 44 may agree with the reference lines 45 and 46. Next, an electron gun 13 is mounted on an electron gun holding mechanism 48. A ray 52 is emitted from a light source 53 aiming at the through hole 51 of the electron gun 13 while operating the rotary regulation dial 49 so that an area of an exposed image may be the maximum. The electron gun holding mechanism 48 is made to rise so far as to hit a stopper pulley 58 by an insertion mechanism 57 while operating an inserting position fine regulating handle 62 so that an inserting position setting line set up in an optical system 71 may agree with a prescribed position of the electron gun 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cathode ray tube assembly apparatus that assembles an electron gun by inserting an electron gun into a predetermined position within pulp.

[Technical background of the invention and its problems]

In general, a cathode ray tube has an external appearance as shown in FIGS. 1 and 2, and a scale line α as shown in FIG. 1 is provided on the face surface. This cathode ray tube has an electron gun α shown in Figure 3 inserted into a glass bulb a, and a plurality of barbs α provided on the circumference of the electron gun α as shown in Figure 4. After holding the electron gun at a predetermined position inside the neck part a of the valve (2), the electron gun is assembled by welding them together using a sealing machine.

In this case, the vertical central axis (12α) of the bulb (6) and the vertical central axis (13) of the electron gun must coincide with each other, and the mutual rotation angles about these must be in a predetermined relationship. , and the position along the central axis (12 direction) of the electron gun 1 in the valve 04 (corresponding to the insertion depth) is
Being in a predetermined position is extremely important for the performance of the cathode ray tube. Therefore, in assembling, it is necessary to set these positional relationships with high accuracy before the welding. Conventionally, these settings were performed as follows.

That is, when setting the rotation angle of the valve 0 and the electron gun (II), first place the valve (2) on the setting jig stand as shown in Fig. 6.Then, the face surface is centered. Abut against the positioning contact plate 0 in the axis (12α) direction,
Further, the lower end face (E) of the outer diameter of the valve is placed on a valve rotation angle positioning stand (E), and the neck portion 0υ is placed on a valve horizontal holding stand Qυ to position and fix.

Next, attach the rotation angle positioning line (2
Mark shi.

In this way, one electron gun 0→ is inserted into the fixedly positioned pulp Q sand along the central axis (12α). At this time, the operator uses visual sense to insert the electron gun (to) the predetermined position @( The rotation angle of the valve (b) and the electron gun a was set by aligning the positioning line (shown in FIG. 3) with the positioning line (2).

In addition, the positioning of the electron gun (11) along the central axis direction is as follows:
As shown in Figure 5, position the positioning jig (E) to the valve (2).
) and the neck part (1!19),
A positioning line (C), which is preset in the positioning jig (2), is also marked on the neck part αQ, and this and the predetermined position (2η (shown in Fig. 3) of the electron gun a1) are clearly visible to the operator. I'm trying to match the feeling.

However, such a method has the following problems.

First, regarding the rotation angle setting between Pal 19 years old and the electron gun), the positioning and fixing of the valve (2) shown in Figure 6 is...
Since this is done based on the outer shape of Marubu (2), if there is a positional rack in the rotational direction between the outer shape of Pulp α and the scale line (11) shown in Fig. 1, the electronic Gun (6)
The rotation angle setting with respect to the original setting partner (scale &1oI) will no longer be performed accurately. Also, Ji J4eα′
I) Since the manual insertion method relies on alignment using (c) and the operator's visual sense, the positioning accuracy is not high, and the electron gun may be bent during insertion, or the position may be corrected after insertion. There are problems such as deformation of the gun and poor workability.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cathode ray tube assembly apparatus that can easily and accurately set the rotation angle between a valve and an electron gun and the insertion position of the electron gun into the bulb.

[Summary of the invention]

A cathode ray tube assembly apparatus according to the present invention is for assembling an electron gun by inserting it into a bulb for an N-ray tube, and aligns the bulb with a preset reference line for the tube axis. a valve holding mechanism configured to hold and be rotatable around the tube axis reference line; a television camera for taking an image of the face of the bulb held by the valve holding mechanism; and a monitor television for projecting the image; an electron gun holding mechanism configured to hold the electron gun so that its vertical center axis coincides with the tube axis reference line and to be rotatable about the tube axis reference line; and a diameter of the electron gun. A television camera that receives a reference light beam whose direction is determined in advance to pass through a through hole provided in the direction, a monitor television that takes a picture of the received light beam, and a television camera that displays the received light image; an insertion mechanism for inserting the electron gun held by the electron gun into the valve; and an insertion mechanism disposed near the electron gun insertion point of the valve held by the valve holding mechanism so that the electron gun is placed at a preset position in the valve. and an optical system for monitoring whether the electron gun has been reached, the valve holding mechanism and the electron gun holding mechanism can be rotated to set their rotation angles while monitoring the monitor television;
Further, the insertion position of the shimiko gun can be precisely set by the optical system.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

In FIGS. 7 and 8, 0 is a frame, and an upper pace (2) is integrally attached to the upper part of the frame via a support column. (B) is a valve holding mechanism, which is rotatably provided on the valve holding table (
) and a valve neck clamp unit (2) provided below the upper pace 03.

The valve holding table (B) holds the upper part of the valve (B) as shown in the figure, and the valve neck clamp unit 0→ holds the neck portion 0→ of the valve (2). Then add these valves (2
) is held so that its vertical center axis (12ff) coincides with a preset reference line Of) for the tube axis.

Further, the valve holding table (to) has a rotation adjustment dial (to), and by rotating this dial, the valve holding table (c) rotates around the reference line Of).

The valve neck clamp unit (g) is shown in Fig. 9 (
") (As shown by →, there is a pair of chuck jaws 01θ (see), but one chuck jaw (to) contacts the neck part θ at a total of 4 points on the top and bottom, and the other chuck O1 and 2 points contact In addition, the two chuck jaws θ1 are arranged in the middle of the four chuck jaws OI, and in the same figure (o),
As shown, the neck portion (g) is held securely and positioned so that its vertical center axis (12α) coincides with the reference line 0η as described above.

The ring is a television camera that is placed above and facing the valve holding mechanism (b) to take an image of the face of the valve (b) held by the valve holding mechanism (b). 9◆ is a monitor TV that shows the image captured by the TV camera. As shown in Fig. 1, scale lines αυ are provided on the face surface, and these are displayed on the monitor TV (Incorporated). Therefore, whether or not the X and Y directions of this scale line α coincide with a preset reference line (c) for setting the rotation angle is monitored on the monitor television θl. If they do not match, turn the rotation adjustment dial (
) to rotate the valve (2). And the reference line -0Q and the X of the scale line a◇.

By matching with the Y direction, the rotation angle of the cipher valve (6) is set to a normal state.

轡 is an electron gun holding mechanism that holds the electron gun (2) so that its vertical center axis (13) coincides with the reference line 071 for the tube axis. , is configured to be rotatable around the reference line 0η, and is rotated in any direction by operating the attached rotary FAR dial θ field to set the rotation angle of the electron gun α.

As shown in FIG. 3, the electron gun (b) is provided with a hole (it]tl+hole II) that passes through it in the diametrical direction, as shown in FIG. 3, for measuring its rotation angle. and to the electron gun holding mechanism)
For the electron gun α) held in the through hole II)
Six beams of light with predetermined directions are applied from the light source. The light beam I2 passing through the through hole Φη is received by a television camera installed on the offending side, and the image of the received light is displayed on a monitor television.

The light beam 69 serves as a reference line for setting the rotation angle of the electron gun, and its direction is set in advance by the controller so that it is parallel to the reference line for setting the valve rotation angle. I'll keep it.

Here, if the rotation angle of ) on the electron gun is as specified,
Since the through-hole and the ray ring coincide, the area of the light-receiving image projected on the monitor TV is maximized. On the other hand, if the rotation angle of the electron gun () is outside the specified angle,
The area of the received light image becomes correspondingly smaller. Therefore, if you operate the rotation adjustment dial (to) so that the area is maximized while monitoring this received light image with the monitor TV ring,
The rotation angle of the electron gun (c) can be set accurately.

6 is an electron gun insertion mechanism that moves the electron gun holding mechanism up and down along the tube axis reference line Cl7).

The electron gun a port is inserted into the valve a port by the upward movement of the insertion mechanism (2). Further, a stone/four pulley for fine adjustment of the insertion position is provided at the upper end of this insertion mechanism. This stopper pulley branch is connected to the adjacent rotating shaft wheel (made by Zolli) via a bell) Iυ.
It is connected to the lower end of the rotation shaft and is rotated by operation of the adjustment handle 814.

In addition, as the stopper pulley rotates, the screw mechanism moves the stopper pulley up and down within a fine adjustment range.

- is a light source elevating mechanism, and a wheel is a television camera elevating mechanism, which are connected via gears to a common drive shaft supported by the frame 0. By rotating the lifting handle provided at the end of the drive shaft, the light source and the television camera are moved up and down in conjunction with each other.

tu is an optical system for enlarging and monitoring the electron gun insertion point, and is placed near the electron gun insertion point of the valve (b) held by the valve holding mechanism (b). This optical system (
As shown in Fig. 9 (J), the lens c) has a mark () set in advance on the insertion position designation line. , shows the electron gun Q inserted into a predetermined position within the valve (6).

In the above configuration, when assembling, first the valve (6
) is placed on the pulp holding table (c) of the pulp holding mechanism (b), the neck α→ is clamped with the clamp unit (2), and the valve (6) is placed on the vertical central axis (12α).
Position and fix it so that it coincides with the tube axis reference line 0η. In this state, the face of the bulb (6) is imaged by a television camera wheel, and the image is projected onto the monitor television θ. Then, operate the rotation adjustment dial (2) so that the X and Y directions of the scale line Q center projected on the monitor TV align with the preset reference line (6), and turn the valve (2). Set the rotation angle.

Next, the electron gun o1 is mounted on the electron gun holding mechanism.

With this installation, the vertical center axis (13 is the tube axis reference line 0'?) of the i subgun α) coincides with the vertical center axis. After the above installation, a light beam (2) is emitted from the light source toward the through hole of the electron gun α-hole. The light beam axis passing through which through hole 11) is received by a television camera, and the received light image is displayed on a monitor television. Therefore, this received light image is monitored, and the rotation adjustment dial θ91 is operated to maximize the area of the received light image, thereby setting the rotation angle of the electron gun.

After completing each of the above settings, in order to insert the electron gun (2) into the valve 04 from the bottom, the insertion mechanism I't) raises the shim gun holding mechanism) until it hits the stopper pulley, and the electron gun (2) is inserted into the valve (6). After that, operate the insertion position fine adjustment handle so that the insertion position setting kneading set in the optical system Q◇ matches the predetermined position (c) of the electron gun a3, and operate the stopper pulley to make fine adjustments. , into the electron gun). After the above settings are completed, sealing is performed using a sealing machine (not shown). After sealing, operate the lift handle 43 to synchronize the light source and the television camera IΦ and raise it to the position where the electron gun 11 is inserted.Then, at this position, the bulb after sealing ( 121 and the electron gun α→ are measured at the same time.

〔Effect of the invention〕

As described above, according to the present invention, since the rotation angle of the valve and the electron gun is set based on the scale line provided on the face of the valve, there is no variation between the pulp outer shape and the position of the scale line. This can also be ignored, improving the accuracy of setting the rotation angle. Furthermore, since the insertion position of the electron gun is monitored using an optical system, there are fewer errors and the setting accuracy is similarly improved. Furthermore, since the valve and the electron gun are inserted in alignment with the reference line for the tube axis, bending and deformation of the electron gun can be prevented, and automation can be easily accommodated.

[Brief explanation of drawings]

1 and 2 are front and side views showing the external shape of the cathode ray tube, FIG. 3 is a front view showing the configuration of the electron gun, and FIG. 4 is a sectional view showing the combination of the bulb and the electron gun. 5 and 6(a) (, 8) are views showing the conventional assembly method, FIG. 7 is a front view showing an embodiment of the N-pole tube assembly apparatus according to the present invention, and FIG. 8 is the side view of Fig. 7, No. 91 (α
) (g) (C) is the top view, side view and usage state diagram of the pulp neck clamp unit shown in Fig. 7.
FIG. 0(α)(k) is an explanatory diagram of the optical system shown in FIG. 7.

Claims (1)

[Claims] (1) In an apparatus for assembling an electron gun by inserting it into pulp for a cathode ray tube, the bulb is held so that its vertical center axis coincides with a preset reference line for the tube axis, and the above-mentioned reference line for the tube axis is held. a pulp holding mechanism configured to be rotatable around the pulp holding mechanism; a television camera that images the face of the valve held by the pulp holding mechanism; and a monitor television that displays the image; An electron gun holding mechanism configured to hold the electron gun so as to coincide with the tube axis reference line and to be rotatable around the tube axis reference line; a television camera that receives a reference light beam whose direction is determined in advance, a monitor television that displays an image of the received light; and an electron gun that moves the electron gun holding mechanism along the tube axis reference line and holds the electron gun therein. an insertion mechanism for inserting the electron gun into the pulp; and an optical system disposed near the Ryuko gun insertion point of the valve held by the pulp holding mechanism to monitor whether the electron gun has reached a preset position within the pulp. A cathode ray tube assembly device comprising: