JPH07211233A - Weight balancing-type positioning method and apparatus therefor - Google Patents

Abstract

PURPOSE:To precisely carry out positioning by supporting an object with the same force as its weight by a supporting means utilizing fluid pressure and holding a plurality of standard parts formed in the object. CONSTITUTION:An air cylinder 16, etc., is installed in three weight balancing apparatuses 10 which support a panel 2, which is an object, of a color cathode- ray tube from the lower side. When air is supplied to the cylinder 16, a mounting stand 12 and the panel 2 on the stand are elevated horizontally to a prescribed height and three pin holders 26 of a centering unit 25 alp set on the opposite to the insides of three supporting pins 3 f formed in the inner wall of the panel 2. Then, three linearly moving levers 27 are moved forward simultaneously by the driving of the unit 25 and the pins 3 are fitted in joining holes 29 of the pin holders 26. At that time, the air pressure is so adjusted by a precision regulator as to make the weight of the panel 2. be same as the total force of these three apparatuses 10. Consequently, since the panel 2 is supported in zero gravity state, positioning of the pins 3 can be adjusted with slight pushing force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight-balance type positioning method and apparatus for accurately positioning an object such as a panel of a color cathode ray tube or a color selection electrode.

[0002]

2. Description of the Related Art Conventionally, a color selection electrode of a color cathode ray tube is generally supported by a support pin integrally provided on an inner wall of a panel via a spring. Normally, such a color selection electrode is supported by a three-pin support system in which support pins are provided on the inner walls of the three sides of the panel, but with the increase in size and definition of color cathode ray tubes. A 4-pin support system has been adopted in which support pins are provided on the inner walls of the four sides of the panel.

FIG. 6 shows an example in which the color selection electrode 1 is supported in a panel 2 of a cathode ray tube by a 4-pin support system. Each of the four inner walls of the panel 2 has one support pin 3 (3
(A, 3B, 3C, 3D) are integrally provided. On the other hand, the supporting springs 6 (6A, 6B, 6) provided with engaging holes 5 on the four sides of the frame 4 of the color selecting electrode 1 respectively.
C, 6D) are attached. These springs 6
The engagement holes 5 of A, 6B, 6C and 6D are fitted and supported by the corresponding support pins 3A, 3B, 3C and 3D, respectively.

As the color selection electrode 1, a shadow mask, an aperture grill or the like is used. In the illustrated example, a large number of grid elements 9 are arranged at a predetermined pitch on a metal frame 4 composed of a pair of supporting members 7A and 7B facing each other and U-shaped elastic members 8A and 8B supporting both ends thereof. It is an application of the aperture grille.

In manufacturing the above-mentioned color cathode ray tube,
In the manufacturing process, a step of measuring the outer surface shape of the panel 2 having a cylindrical surface and an outer surface shape of the color selection electrode 1 having a curved surface, a welding step of the spring 6 in the color selection electrode 1 to the frame 4, and the like are included. is there. The outer surface shape of the panel 2 or the color selection electrode 1 is measured in a state where the panel 2 or the color selection electrode 1 is positioned at a predetermined position by a positioning device.

Also, when welding the fourth spring 6D of the color selection electrode 1, the fourth support pin 3 of the panel 2 is welded.
Since D is provided on the inner wall of the panel with some error with respect to the predetermined position, the 4-pin support type color selection electrode 1
In this case, at least the fourth spring 6D is welded so as to recognize the position of the fourth support pin 3D of the panel targeted for marriage (that is, the panel to be paired with the color selection electrode) and properly fit it. Must. The measurement of the position of the fourth support pin 3D is also performed with the panel 2 positioned by the positioning device, and the measured value is input to the welding device to perform welding.

For example, three springs 6 are provided on the frame 4 (actually, a holder fixed to the frame 4) of the color selection electrode 1.
After welding A, 6B and 6C, the color selection electrode 1 is attached to the panel 2
Mounted on the three support pins 3A, 3B, 3C of
And the relative position of the color selection electrode 1 is determined. Next, the fourth spring 6D is fitted to the fourth support pin 3D of the panel 2, and then the other end is attached to the frame 4 of the color selection electrode 1.
It was welded to (ie its holder).

Such a conventional positioning device for the color selection electrode 1 has four springs 6 (6) as shown in FIG.
A, 6B, 6C, 6D) are provided with four positioning pins 50. Then, among these four positioning pins 50, three positioning pins 50 are respectively engaged with the engagement holes 5 of the three springs 6A, 6B, 6C, and these three positioning pins 50 are used for the color selection electrode. The color selection electrode 1 is floated and held from the mounting table 51 by scooping up 1. Further, as shown in FIG. 8, the conventional positioning device for the panel 2 includes four pins 3 (3A, 3A,
3B, 3C, 3D) corresponding to four pin holders 52
Is provided. And these four pin holders 5
Of the two, the three pin holders 52 are replaced by the three pins 3A, 3
These three pin holders 5 are engaged with B and 3C, respectively.
The panel 2 is scooped up by 2 so that the panel 2 is floated and held from the mounting table 51.

In order to facilitate the scooping of the color selection electrode 1 by the positioning pin 50 or the scooping of the panel 2 by the pin holder 52, the positioning pin 50 is used.
A taper is provided on the outer peripheral surface of the tip of the pin holder 52.
The inner peripheral surface of the hole is tapered.

[0010]

However, in the conventional positioning device as described above, the color selection electrode 1 is used.
In the case of, the three positioning pins 50 are engaged and held in the engaging holes 5 of the three springs 6A, 6B, 6C, respectively. In the case of the panel 2, the three pins 3A, 3B,
Since the three pin holders 52 are engaged with and held by the 3C, the color selecting electrode 1 and the panel 2 are heavy in weight, especially in the case of a large color cathode ray tube. In the case of, the frictional force between the positioning pin 50 and the engagement hole 5 of the spring 6 becomes large, and in the case of the panel 2, the frictional force between the pin holder 52 and the support pin 3 becomes large. As a result, it may occur that the positioning pin 50 or the pin holder 52 cannot be completely inserted only by the pressing force of the positioning pin 50 or the pin holder 52. In this case, the reference surface cannot be obtained correctly, There was a problem in that the accuracy at the time of assembly was insufficient and a highly accurate color cathode ray tube could not be manufactured.

The present invention has been made in view of the above conventional problems, and provides a weight balance type positioning method and apparatus capable of accurately positioning and holding an object such as a panel or an aperture grill. Is intended.

[0012]

In order to solve the above-mentioned problems and the like and to achieve the above-mentioned object, the present invention uses, for example, a force equivalent to the weight of the object (1, 2). Positioning the object (1, 2) by supporting (1, 2) from below and holding a plurality of reference parts (3A, 3B, 3C, 5) provided on the object (1, 2). Is characterized by.

Further, according to the present invention, for example, as shown in FIGS. 1 to 5, an object (1, 2) having a plurality of reference portions (3A, 3B, 3C, 5) serving as a reference for positioning. A plurality of supporting means 10 capable of supporting the target object (1, 2) from below with a force equivalent to the weight of the plurality of reference parts (3A, 3A).
B, 3C, 5) is provided with positioning means (25, 42) for engaging and holding the holding parts (29, 43) respectively to hold and position the objects (1, 2).

Further, the support means 10 relating to the weight balance type positioning device of the present invention, as shown in FIG. 5, for example, is a mounting table 12 on which the objects (1, 2) are mounted, and this mounting table 12. A fluid pressure cylinder 16 connected to the fluid pressure cylinder 16 and a fluid pressure source for raising and lowering the mounting table 12 through the operation of the fluid pressure cylinder 16 can be provided.

A panel of a color cathode ray tube can be applied as an object of the weight balance type positioning device of the present invention, and a support pin provided on this panel may be used as a reference portion.

Furthermore, a color selection electrode of a color cathode ray tube can be applied as an object of the weight balance type positioning device of the present invention, and a spring provided in this color selection electrode may be used as a reference portion. .

[0017]

According to the present invention, as described above, the object (1, 2) is applied with a force equivalent to the weight of the object (1, 2).
Is supported from below, and a plurality of reference parts (3A, 3B, 3C, 5) provided on the object (1, 2) are held in this state, and the object (1, 2) can be accurately positioned. it can.

Further, the object (1,
2) is supported from below by a force equivalent to the weight of the object (1, 2), and the plurality of reference parts (3) of the object (1, 2) are supported.
By engaging and holding the holding portions (29, 43) to the A, 3B, 3C, 5), respectively, the objects (1, 2) can be moved with a light force and positioned accurately and reliably. .

Further, when the fluid pressure of the fluid pressure source is supplied to the fluid pressure cylinder 16, the mounting table 12 connected to this fluid pressure cylinder 16 moves up and down, and the objects (1, 2) are positioned at predetermined positions. To be done.

Then, the object is the panel 2 of the color cathode ray tube, and the supporting pin 3 provided on the panel 2 is used as the reference portion to be engaged and held by the holding portion of the positioning means 25, whereby the panel 2 is accurately positioned. can do.

Further, the object is the color selection electrode 1 of the color cathode ray tube, and the spring 6 provided on the color selection electrode 1 is used as a reference portion to be engaged and held by the holding portion of the positioning means 42, whereby the color selection is performed. The electrode 1 can be accurately positioned.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, FIGS. 3 and 4 show a second embodiment of the present invention, and FIG. 5 shows an embodiment of a supporting means according to the present invention. 1 to 5
In FIG. 6, the same parts as those in FIG.

FIG. 1 showing the first embodiment is an application of a panel 2 of a color cathode ray tube as an object. In FIG. 1, 10 is a weight balance device showing a specific example of a supporting means for supporting the panel 2 from below. The weight balance device 10 is composed of a shaft 11, a mounting table 12, a holder 13, a bush 14, a bracket 15, an air cylinder 16 and a shaft coupling 17, as shown in an enlarged sectional view in FIG.

The shaft 11 has a disk-shaped head portion 11a,
The head 11a has a shaft portion 11b which is continuous with the center of the lower surface and a convex portion 11c which is continuous with the center of the lower surface of the shaft portion 11b.
2 is fastened and fixed by a mounting screw 18. The shaft 11 is preferably made of metal such as aluminum alloy or steel, while the mounting table 12 is preferably made of synthetic resin. The reason why the material of the mounting table 12 is made of synthetic resin is to protect the contact surface of the color selection electrode 1 or the panel 2 as an object to be mounted by lowering the hardness of the mounting surface. Therefore, even a material other than synthetic resin can be used as the mounting table as long as the hardness of the mounting surface can be lowered.

The shaft portion 11b of the shaft 11 has a holder 13
The bush 11 is slidably inserted into the bush 14 fitted and fixed to the shaft 11.
It is held so that it can be moved up and down. This holder 13
Is fastened and fixed to the base 20 by a fixing screw 19, and the shaft portion 11b and the convex portion 11c are inserted into the through hole 21 provided in the base 20. Then, below the convex portion 11c of the shaft 11, a rod 16a of an air cylinder 16, which is a specific example of a fluid pressure cylinder, is arranged so that their axes are the same.

The air cylinder 16 includes a bracket 15
On the other hand, both ends are rotatably supported by a support screw 22, and the bracket 15 is fixed to the lower surface of the base 20 by a fixing screw 23. The convex portion 11c of the shaft 11 and the rod 16a of the air cylinder 16 are connected by a shaft joint 17 configured to transmit an axial force even when two axes intersect at an angle like a universal joint. There is. Therefore, when the rod 16a moves back and forth due to the operation of the air cylinder 16, the shaft 11 and the mounting table 12 connected by the shaft joint 17 also move back and forth, and the mounting table 1
The object placed on 2 is moved up and down.

At least two weight balance devices 10 having such a structure are required to support the panel 2 from below, but in the present embodiment, three weight balance devices 10 are provided to facilitate balance. Base 2
It is arranged in three places of 0. The three weight balance devices 10 receive the sealing surface of the panel 2 so that the panel 2 can be supported from below with a force equivalent to the weight of the panel 2.

In order to ensure the function of the weight balance device 10, an air pressure device (not shown) showing a specific example of a fluid pressure source is connected to each air cylinder 16. This air pressure device has an air compressor, a motor, a pressure control valve, and the like, and is also provided with a regulator capable of precisely adjusting the pressure supplied to each air cylinder 16. By the function of this regulator, 3 air cylinders from the air pressure device 1
The air pressure supplied to 6 is adjusted so that the resultant force of the three weight balance devices 10 becomes equal to the weight of the panel 2.

A centering unit 25, which is a specific example of positioning means for holding and positioning the panel 2, is disposed in the center of the inside of these three weight balance devices 10. The centering unit 25 has three linear movement levers 27 each having a pin holder 26, and a center member 28 for moving the linear movement levers 27 back and forth.
The rotation of 8 allows the three linear movement levers 27 to move forward and backward simultaneously. The pin holders 26 of the three linear movement levers 27 are provided so as to face the three support pins 3A, 3B, and 3C, which serve as reference surfaces for positioning the panel 2. Further, each pin holder 26 is provided with an engagement hole 29 showing a specific example of a holding portion opened to the tip end surface, and the inner peripheral surface thereof is tapered on the outer peripheral surface of the support pins 3A, 3B, 3C. The taper is matched.

By operating the centering unit 25 having such a structure, the three support pins 3A, 3B, 3C corresponding to the respective engagement holes 29 of the three pin holders 26 are formed.
By engaging with the three support pins 3A, 3
Panel 2 with the plane passing through the center of B and 3C as the reference plane
Are positioned and held by the centering unit 25.

Reference numeral 30 shown in FIG. 1 is a magnetic scale for measuring the outer surface of the panel 2, and reference numeral 31 is a magnetic scale for measuring the inner surface of the panel 2 as well.
The outer surface magnetic scale 30 and the inner surface magnetic scale 31 measure a plurality of portions on the outer surface and the inner surface of the panel 2 so that the shape of the panel 2 conforms to a predetermined shape based on the reference surface. It is determined whether or not it is formed by. Further, this panel positioning device is also provided with a magnetic scale (not shown) for detecting the position of the fourth support pin 3D.
Incidentally, 32 is a bracket for supporting the magnetic scale 30, and this bracket 32 is fixed to the base 20 by a fixing means such as a fixing screw.

The magnetic scales 30 and 31 as described above have a magnetic grid recorded on a magnetic medium as a scale, and have a magnetic head for detecting displacement of an object and outputting a detection signal. Magnetic scale 3 detected by this magnetic head
The detection signals of 0 and 31 are input to the processing device, and are calculated by this processing device to determine the appropriateness of the shapes of the color selection electrode 1 and the panel 2 which are the objects, or the fourth selection of the color selection electrode 1 is performed. Panel 2 required for welding spring 6D
The position of the fourth support pin 3D is measured.

The operation of the panel positioning device having such a structure is as follows, for example. First, the panel 2 is mounted on the mounting table 12 of the three weight balance devices 10, and the panel 2 is supported from below by these three weight balance devices 10. Then, by supplying air to the air cylinders 16 of the three weight balance devices 10, the axial force of the rod 16a is transmitted to the shaft 11 and the mounting table 12 via the shaft coupling 17 and pushed upward. The panel 2 placed on the placing table 12 is pushed up to a predetermined height.

In this case, three weight balance devices 1
0 is adjusted with a precision regulator so that the total force is equal to the weight of the panel 2.
The panel 2 placed on top is supported horizontally. In this state, the three support pins 3 provided on the inner wall of the panel 2
A centering unit 25 is provided inside A, 3B, and 3C.
The three pin holders 26 face each other so as to face each other, but the centers of the engagement holes 29 of the respective pin holders 26 do not always coincide with the centers of the pins 3A, 3B, 3C, and some deviations may occur. May have occurred.

Next, the centering unit 25 is operated from this state, and the three linear movement levers 27 are simultaneously advanced to engage the engagement holes 29 of the respective pin holders 26 with the support pins 3A, 3B, 3C, respectively. . When the center of the engagement hole 29 and the center of the support pins 3A, 3B, 3C coincide with each other, the engagement hole 29 and the support pin 3 are fitted smoothly, and there is no particular problem.

However, if the centers of the two do not coincide, a part of the peripheral edge of the engagement hole 29 causes the support pin 3A,
A part of the tapered surfaces of 3B and 3C is contacted, and a frictional force is locally generated. For this reason, as the weight of the panel 2 increases, the frictional force also increases, which may cause improper fitting. Particularly, in the conventional panel supporting method using only the pin holder 52 and the supporting pin 3, the above frictional force is small for a panel having a small screen size and a light weight. By the function, it is possible to correct the hole and the center of the support pin 3 by only pressing force between the hole of the pin holder 52 and the support pin 3. However, the larger the screen size and therefore the heavier the panel, the more the hole If there is a deviation between the pin position and the pin position, the frictional force also increases, and the pressing force between the hole and the pin is not sufficient to correct the center position of the two, resulting in poor fitting. Therefore,
In such a defective fitting state, the standard of the panel 2 is not determined, and not only the positioning failure but also the accuracy during assembly cannot be obtained.

On the other hand, in this embodiment, the panel 2 has a force equivalent to the weight of the three weight balance devices 1.
It is given by 0, whereby the panel 2 is supported as if it were in a weightless state. Then, this weightless state is achieved by the three weight balance devices 10
Even if another new force is applied to the panel 2, the three weight balance devices 10 move forward and backward so as to cancel the external force and keep the parallel state.

As a result, the center of the engaging hole 29 and the centers of the supporting pins 3A, 3B, 3C do not coincide with each other, so that part of the periphery of the engaging hole 29 is a tapered surface of the supporting pins 3A, 3B, 3C. Even if the frictional force is locally increased by abutting a part of the panel, the three weight balance devices 10 operate so as to cancel the frictional force, so that the panel 2 can be vertically moved with a light force. it can. As a result, the positions of the support pins 3A, 3B, 3C can be adjusted up and down by a light pressing force of the pin holder 26, so that the support pins 3A, 3 can be adjusted.
The pin holder 26 can be engaged with the support pins 3A, 3B, 3C while aligning the centers of B and 3C with the center of the engagement hole 29, and therefore the panel 2 can be positioned accurately and reliably. .

After the panel 2 is thus aligned, the outer surface magnetic scale 30 and the inner surface magnetic scale 31 are actuated to bring the respective magnetic heads into contact with the outer surface and the inner surface of the panel 2, and the contact surfaces thereof. Measure the position of each. In this case, as described above, the positioning of the panel 2 is accurately performed, and the outer surface and the inner surface of the panel 2 are measured in that state, so that each measurement point can be accurately measured. Therefore, the suitability of the shape of the panel 2 can be accurately determined.

Similarly, after the panel 2 is aligned, the magnetic scales for the support pins are operated to bring their magnetic heads into contact with the fourth pin 3D and measure the positions of their contact surfaces, respectively. Also in this case, similarly, since the fourth support pin 3D of the panel 2 is measured while the panel 2 is accurately positioned, the support pin 3D concerned is measured.
It is possible to accurately measure the measurement site and position.
This makes it possible to accurately weld the fourth spring 6D described later.

FIG. 3 showing the second embodiment applies the color selection electrode 1 of the color cathode ray tube as an object. 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Also in this embodiment, the weight selecting device 1 is configured to be supported by the three weight balancing devices 10, but the number of the weight balancing devices 10 may be two, or four or more.

As shown in the enlarged view of FIG. 4, the color selection electrode 1 shown in this embodiment comprises a metal frame 4 and a grill plate 40 in which a large number of grid elements 9 are arranged at a predetermined pitch. The grill plate 40 is welded to the frame 4 under tension. The frame 4 includes a pair of support members 7A and 7B installed so as to face each other, and U-shaped elastic members 8A and 8B that support both ends of the pair of support members 7A and 7B. On the four sides of
Supporting springs 6 (6A, 6B, 6C, 6D) are attached via spring holders 41, respectively. Each of the springs 6A, 6B, 6C, 6D is provided with a triangular engaging hole 5 serving as a reference portion,
Supporting pins 3A, 3B, 3C, 3 corresponding to the engaging holes 5
The color selection electrodes 1 are incorporated in the panel 2 by fitting them into the respective D.

Reference numeral 42 shown in FIG. 3 denotes a set unit for the color selection electrode, which includes three springs 6A, 6B,
The color selection electrode 1 is held at a predetermined position by three set units 42 provided so as to face 6C. The set unit 42 has a positioning pin 43 that is provided so as to project inward and can move back and forth in the horizontal direction. The positioning pin 43 is driven by an actuator 44. As such an actuator 44, for example,
Various devices such as an air cylinder and a motor can be applied.

Further, in FIG. 3, 45 is a magnetic scale for measuring the upper surface of the frame 4 of the color selecting electrode 1, and 46 is a magnetic scale for measuring the side surface of the frame 4 as well. These magnetic scales 45, 4
By measuring a plurality of parts on the outer surface of the frame 4 with 6, the shape of the frame 4 is determined by three springs 6A,
It is determined whether or not it is formed in conformity with a predetermined shape, which is based on a reference plane (reference surface) obtained by connecting the centers of the engagement holes 5 of 6B and 6C. I am trying to judge.

Reference numeral 47 is a bracket for supporting the magnetic scale 45, and 48 is a bracket for supporting the magnetic scale 46. Both of the brackets 47 and 48 are fixed to the base 20 by a fixing means such as a fixing screw. It is fixed. Other configurations are the same as those in the above embodiment.

The operation of the positioning device for the color selection electrode having such a structure is as follows, for example. Among these, the step of mounting the color selection electrode 1 on the mounting table 12 of the three weight balance devices 10 and then pushing it up to a predetermined height is the same as in the above-described embodiment. In this state, the precision regulator is adjusted so that the total resultant force of the three weight balancing devices 10 becomes equal to the weight of the color selection electrodes 1, so the color selection electrodes mounted on the three mounting tables 12 are adjusted. 1 is supported in a horizontal state. And 3 of the color selection electrode 1
The three positioning pins 43 of the set unit 42 face the outside of the three springs 6A, 6B, 6C provided on the sides so as to face each other, but the center of each positioning pin 43 is the spring 6A, It does not always coincide with the center of the engagement hole 5 of 6B and 6C, and there may be some deviation.

From this state, the set unit 42 is operated, and the positioning pin 43 is engaged with the engagement holes 5 of the springs 6A, 6B, 6C via the actuator 44, respectively. In this case, also in the present embodiment, the color selection electrodes 1 are supported from below by the action of the three weight balance devices 10 as if they were in a weightless state, as in the above embodiments. Therefore, since the center of the positioning pin 43 and the center of the engaging hole 5 do not coincide, the positioning pin 43
Even if a part of the peripheral edge of the contact part comes into contact with the peripheral edge of the engagement hole 5 and the frictional force locally increases, the three weight balance devices 10 move so as to eliminate the frictional force, and thus the weight is similarly light. The color selection electrode 1 can be moved vertically by force.

As described above, in this embodiment as well, the springs 6A, 6 are caused by the light pressing force of the positioning pin 43.
The positions of B and 6C can be adjusted up and down. Therefore, the positioning pin 43 can be engaged with the engagement hole 5 while aligning the center of the positioning pin 43 with the center of the engagement hole 5, whereby the color selection electrode 1 can be accurately and surely. Can be positioned.

After the color selection electrodes 1 are aligned in this way, the magnetic scales 45 and 46 are operated to bring the respective magnetic heads into contact with the outer surface of the color selection electrode 1 and measure the positions of the contact portions. To do. In this case, as described above, the positioning of the color selection electrode 1 is accurately performed, and the outer surface of the color selection electrode 1 is measured in that state, so that each measurement site can be accurately measured. Therefore, the suitability of the shape of the color selection electrode 1 can be accurately determined.

Next, the case where the fourth spring 6D is attached to the color selection electrode 1 will be described. In this case, since the position of the fourth support pin 3D of the panel 2 is precisely measured as described above, the fourth spring 6D is attached to the color selection electrode 1 based on the measurement result.

That is, what is the positional relationship of the position of the fourth support pin 3D of the panel 2 with respect to the reference plane determined by the other three support pins 3A, 3B and 3C based on the above-mentioned measurement results. You can see if it is in this support pin 3D
The position of the engagement hole 5 of the fourth spring 6D corresponding to the other is the other three springs 6A, 6B,
It is the same as the position with respect to the reference plane determined by 6C.
Therefore, by making the reference surface of the color selection electrode 1 coincide with the reference surface of the panel 2, the detection position of the fourth support pin 3D can be regarded as the position of the engagement hole 5 of the spring 6D. As a result, the engaging hole 5 is arranged at the above-mentioned deemed position and
The fourth spring 6D is welded to the spring holder 41 fixed to the frame 4 so that the fourth spring 6D is aligned with the position of the fourth support pin 3D of the panel 2 and is accurately attached to the color selection electrode 1. be able to.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, an example in which an aperture grill is applied as a color selection electrode of an object has been described. Can also be applied to. Further, in the above-described embodiment, the example in which the air pressure is used as the fluid pressure has been described, but it goes without saying that hydraulic pressure can be used. Further, the vertical movement / instruction of the mounting table 12 due to the adjustment of the fluid pressure or the like can be controlled based on the information obtained from the position sensor such as the magnetic scale. As described above, the present invention can be variously modified without departing from the spirit thereof.

[0053]

As described above, according to the present invention,
It is possible to provide a weight-balanced positioning method that can position an object while adjusting the position of the object up and down with a light force and can position the object accurately and reliably.

Further, in the present invention, since the supporting means capable of supporting the target object and the positioning means capable of holding the target object are provided and the target object is supported with a force equivalent to the weight of the target object, it is light. Weight balance type positioning that can move the object vertically with force, and can position the object accurately and surely by adjusting the position of the object vertically with a light force. A device can be provided.

Further, by constructing the supporting means by the mounting table, the fluid pressure cylinder and the fluid pressure source, the device having the above effects can be easily manufactured.

Then, the object can be used as a panel of the color cathode ray tube, and the supporting pins provided on the panel can be engaged and held by the holding portion of the positioning means with the supporting portion provided as a reference portion, whereby the panel can be accurately positioned.

Furthermore, the color selection electrode of the color cathode ray tube can be accurately positioned by engaging and holding the object as the color selection electrode of the color cathode ray tube with the spring provided therein as the reference part in the holding part of the positioning means. it can.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the back side of the panel shown in FIG.

FIG. 3 is a schematic explanatory view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of the front surface side of the color selection electrode shown in FIG.

FIG. 5 is a sectional view showing an embodiment of the weight balance device according to the present invention.

FIG. 6 is a plan view showing a state in which a color selection electrode is supported on a panel.

FIG. 7 is a process diagram showing a positioning state of a conventional panel positioning device.

FIG. 8 is a process diagram showing a positioning state of a conventional positioning device for a color selection electrode.

[Explanation of symbols]

 1 color selection electrode (object) 2 panel (object) 3A, 3B, 3C Support pin (reference part) 3D 4th support pin 4 Frame 5 Engagement hole (reference part) 6A, 6B, 6C, 6D Spring 10 Weight balance device (supporting means) 11 Shaft 12 Placement table 16 Air cylinder (fluid pressure cylinder) 17 Shaft joint 25 Centering unit (positioning means) 26 Pin holder 29 Engagement hole (holding portion) 30, 31, 45, 46 Magnetic scale 42 Set unit (positioning means) 43 Positioning pin (holding part)

Claims (5)

[Claims] 1. A weight balance type characterized in that an object is supported from below by a force equivalent to the weight of the object, and the object is positioned by holding a plurality of reference portions provided on the object. Positioning method. 2. A plurality of supporting means capable of supporting the target object from below with a force equivalent to the weight of the target object having a plurality of reference parts serving as a reference for positioning, and a holding part on the plurality of reference parts. And a positioning means for holding and positioning the object by respectively engaging with each other. 3. The weight balance type positioning device according to claim 2, wherein the supporting means includes a mounting table on which an object is mounted, a fluid pressure cylinder connected to the mounting table, and a fluid pressure cylinder of the fluid pressure cylinder. A weight-balance type positioning device, comprising: a fluid pressure source that moves up and down the mounting table through operation. 4. The weight balance type positioning apparatus according to claim 2, wherein the object is a panel of a color cathode ray tube, and a support pin provided on the panel is used as the reference portion. Positioning device. 5. The weight balance type positioning device according to claim 2, wherein the object is a color selection electrode of a color cathode ray tube, and a spring provided in the color selection electrode is used as the reference portion. Weight balance positioning device.