JPH08167376A - Method and device for assembling aperture grille - Google Patents

Abstract

PURPOSE: To assemble a flat aperture grille with excellent precision along a pair of curved frame by means of a simple mechanism using the flat aperture grill of small width. CONSTITUTION: A pair of curved frames 8, 9 of an aperture grille frame 7 are pressed in parallel against a flat aperture grille 1 from the Z-direction orthogonal thereto in the condition where tension is applied to the flat aperture grille 1 in X and Y directions in the same plane. The flat aperture grille 1 is brought into close contact with a pair of curved frames 8, 9 to tightly stretching the flat aperture grille 1 between a pair of curved frames 8, 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for assembling an aperture grill used as a color selection electrode of a Trinitron (trade name of Sony Corporation) type color cathode ray tube (CRT).

[0002]

2. Description of the Related Art As is well known, as shown in FIG. 16, an aperture grill of a trinitron color cathode ray tube has a flat aperture grill 1 formed of a rectangular thin metal plate and a substantially rectangular shape by a metal frame. It is assembled by the aperture grille frame 7 assembled in a frame shape.

At this time, when the length direction of the rectangular flat aperture grill 1 is the X direction, the width direction is the Y direction, and the vertical direction perpendicular to these is the Z direction, the flat aperture is In the center of the grill 1,
A color selection electrode main portion 2 formed by slits 2a in the shape of an interlocking grid parallel to the Y direction is formed. And
Both end edges 1 of the flat aperture grill 1 in the Y direction
A pair of positioning holes 3 and 4 formed by Dharma holes are formed on the center P in the X direction of a and 1b.
A pair of cutting slits 5 are formed on both sides of the color selection electrode main portion 2 at both ends 1c and 1d in the X direction of the flat aperture grill 1 in parallel with the Y direction. Edges 1a, 1d in the direction
A pair of perforations 6 parallel to the X direction are provided on both sides of the color selection electrode main portion 2 along the inner sides of the pair of positioning holes 3 and 4, and between the both ends of the pair of slits 5. Is formed in.

The aperture grille frame 7 is
A pair of curved frames 8 and 9 that are curved in a substantially arcuate shape with a large radius of curvature along the X direction, and between the two ends of the curved frames 8 and 9 on the back side of the curved frames 8 and 9. Is connected in the Y direction integrally, and is formed in a substantially rectangular frame shape by a pair of substantially U-shaped and symmetrical connecting arms 10 and 11. Further, parallel curved surfaces 8a and 9a, which are curved in an arc shape with a large radius of curvature, are formed on the surface sides of the pair of curved frames 8 and 9.

The length X ₁ of the pair of curved surfaces 8a and 9a of the aperture grill frame 7 in the X direction and the interval X ₂ of the pair of slits 5 of the flat aperture grill 1 in the X direction are approximately X ₁ ≥ It is configured for X ₂ . Further, the inner distance Y ₁ and the outer distance Y _{2 of the} pair of curved surfaces 8a and 9a in the Y direction and the maximum width Y ₃ of the color selection electrode main portion 2 of the flat aperture grill 1 in the Y direction.
And the relationship between the pair of perforations 6 and the interval Y ₄ in the Y direction is Y ₁ > Y ₃ and Y ₂ > Y ₃ . Incidentally, they are formed in a pair of strip-like regions weld area S ₁ between the Y-direction on both sides and a pair of perforations 6 of the color selection electrode main portion 2 of the flat aperture grille 1, the pair of welding area S ₁ The pair of positioning holes 3, 4 are formed on the center P in the pair of positioning hole regions S ₂ which are outer band spaces.
Are formed.

Therefore, after the pair of welding areas S ₁ of the flat aperture grill 1 are arcuately welded along the pair of curved curved surfaces 8a and 9a of the aperture grill frame 7, the periphery of the color selection electrode main portion 2 is paired. Slit 5 and perforation 6
The aperture grill as shown in FIG. 5 is assembled by cutting along the portion.

At this time, in the aperture grill, unlike the general shadow mask, since the color selection electrode main portion 2 is formed very flexibly by the slits 2a in the shape of a blind grid, the flat aperture grill 1 is formed in the X direction and in the X direction. If the flat aperture grill 1 is not welded to the aperture grill frame 7 in a state in which the optimum tension is applied in the two directions of the Y direction, the slit 2a will be distorted, loosened, etc., resulting in a defective product.

Therefore, the applicant of the present invention has previously filed an application for the aperture grill assembling apparatus shown in FIGS. 17 to 19.

In this prior application, first, the positioning holes 3 and 4 of the flat aperture grill 1 are engaged with a pair of vertical positioning pins 14 on the tips of the pair of support arms 13 from above, and then the pair of positioning is performed. A weak tension is applied to the flat aperture grill 1 by the pin 14 in the Y _a directions which are opposite to each other in the Y direction.

[0010] Then, Y-direction of the opposite end edges 1a of the flat aperture grille 1, in 1b, the upper and lower pair of belt-shaped pair of clamping allowance S ₃ that extra provided outside the pair of positioning holes area S _2, a total of 4 The two chuck blocks 15 and 16 are sandwiched between the upper and lower chuck surfaces 15a and 16a with _a high pressure in the vertical direction Z _a direction and Z _b direction.

At this time, a pair of upper and lower chuck blocks 1
5,16 of the upper and lower chucking surface 15a, 16a is being processed with high precision at the same radius of curvature as the pair of curved surfaces 8a, 9a of the aperture grill frame 7, a pair of clamping allowance S ₃ by these chucks blocks 15 and 16 The flat aperture grill 1 sandwiched between the upper and lower sides is automatically curved along the X direction into an arc shape having the same radius of curvature as the pair of curved surfaces 8a and 9a.

Therefore, with a pair of upper and lower chuck blocks 15 and 16, a total of four chuck blocks 15 and 16, with a pair of sandwiching margins S ₃ of the flat aperture grill 1 sandwiched, they are pulled with high tension in the Y _a directions which are opposite to each other in the Y direction. hand,
With a high tension applied in the X direction to the flat aperture grille 1, the pair of curved curved surfaces 8a and 9a of the aperture grille frame 7 are pressed against the flat aperture grille 1 from the Z _a direction so as to be in close contact with each other in parallel.

Then, in this state, the pair of welding regions S ₁ of the flat aperture grill 1 are arcuately seamed along the pair of curved curved surfaces 8a, 9a of the aperture grill frame 7 by the pair of electrode rollers 17 as welding means. Welding 1
Then, the assembly of the aperture grill is completed.

[0014]

However, in this prior application, since a pair of pinching margins S ₃ must be additionally provided outside the pair of positioning hole regions S ₂ in the Y direction of the flat aperture grill 1, the flat aperture grill 1 is flat. The minimum required width Y ₅ of the aperture grill 1 in the Y direction must be very large. That is, Y ₅ ≧ (Y ₄ + 2S ₂
+ 2S ₃ ) is required.

Therefore, in the prior application, the flat aperture grill 1 having a very large width Y _{5 in the} Y direction must be used, and there is a great waste of material removal from the raw material of the flat aperture grill 1. The cost is very high.

In order to bend the flat aperture grill 1 into an arc shape having the same radius of curvature as the pair of curved curved surfaces 8a, 9a of the aperture grill frame 7, a pair of upper and lower chuck blocks 15, 16 are provided in total. 1
Since 5a and 16a must be processed with high precision, the processing cost is very high.

When the pair of curved curved surfaces 8a and 9a of the aperture grill frame 7 are pressed against the flat aperture grill 1 to be in close parallel contact with each other, the flat aperture grill 1 is held while maintaining the same radius of curvature as the pair of curved curved surfaces 8a and 9a.
In order to apply a high tension in the X direction to the chucks, a pair of upper and lower chuck blocks 15 and 16 in total are provided in the Z _a direction and the Z _b direction.
High clamping force from the direction and high tension in the direction Y _a are required. For this reason, in the prior application example, a plurality of hydraulic cylinders are used and Z _a and Z of these chuck blocks 15 and 16 are used.
_b, is performed in each direction of the drive of Y _a, the hydraulic cylinder maintenance is troublesome, maintenance cost is very high.

A pair of upper and lower chuck blocks 15 and 16 are sandwiched between the flat aperture grill 1 and the pair of curved surfaces 8a of the aperture grill frame 7, respectively.
In the method of curving in an arc shape with the same radius of curvature as 9a, it is necessary to prepare a dedicated chuck block for each size and shape of the aperture grill, and one type of chuck block changes the size and shape of the aperture grill. However, there is a problem that it is impossible to assemble a wide variety of products with one assembly device.

The present invention has been made to solve the above problems, and uses a flat aperture grill having a small width and a simple mechanism to convert the flat aperture grill into a pair of curved frames of the aperture grill frame. It is an object of the present invention to provide an assembling method and an assembling apparatus for an aperture grill that can be assembled with high accuracy.

[0020]

The method of assembling the aperture grill according to the present invention for achieving the above object comprises a flat aperture grill having two lengthwise and widthwise directions in one plane.
The process of applying tension in the direction and by pressing the pair of curved frames of the aperture grill frame against the flat aperture grill to which the tension is applied in parallel from the right angle direction, the flat aperture grill is modeled on the pair of curved frames. A step of bridging the flat aperture grill between the pair of curved frames so as to be in close contact with each other, and welding both widthwise end edges of the bridged flat aperture grill along the pair of curved frames of the aperture grill frame. And a step of performing.

Further, the aperture grill assembling apparatus according to the present invention engages with one of the pair of positioning holes formed at both widthwise end edges on the center in the lengthwise direction of the flat aperture grille. The reference pin to be fitted and the positioning pin that is engaged with the other positioning hole to apply tension in the width direction to the flat aperture grill and the four corners of the flat aperture grill are sandwiched, and the flat pin is used as a reference with respect to the flat pin. The four chuck mechanisms that apply tension to the aperture grille in two directions, that is, the lengthwise direction and the widthwise direction, and the aperture grill frame are positioned by the positioning means, and the pair of curved frames of the aperture grille frame are subjected to the tension. Press parallel to the flat aperture grille to which the In addition, the flat aperture grill is closely adhered to the pair of curved frames so that the flat aperture grill can be bridged between the pair of curved frames, and the width direction of the bridged flat aperture grills. And a welding means for welding both end edges of the two along the pair of curved frames of the aperture grill.

[0022]

According to the method of assembling the aperture grill of the present invention configured as described above, tension is applied to the flat aperture grill in two directions, the length direction and the width direction, within one plane, and By pressing the pair of curved frames against the flat aperture grills in a direction perpendicular to each other, the flat aperture grilles are closely adhered along the pair of curved frames, and the flat aperture grills are tensioned between the pair of curved frames. It is designed to be bridged, and the flat aperture grille is simple and imitates a pair of curved frames.
It can be passed over with high precision.

Further, in the aperture grill assembling apparatus of the present invention configured as described above, the pair of positioning holes formed at both ends in the width direction on the center in the length direction of the flat aperture grill serves as reference pins. By engaging with the positioning pin and applying tension in the width direction to the flat aperture grill by the positioning pin, the flat aperture grill is positioned with respect to the reference pin. Then, the four corners of the flat aperture grille are sandwiched by a total of four chucking mechanisms, and these chucking mechanisms apply tension to the flat aperture grille in two directions, a lengthwise direction and a widthwise direction, within one plane with reference to the reference pin. Add. Then, the pair of curved frames of the aperture grill frame are pressed parallel to the flat aperture grill from the right angle direction by the movable base which positions the aperture grill frame by the positioning means, and the flat aperture grill is closely adhered following the pair of curved frames. In this way, the flat aperture grill is tensioned and bridged between the pair of curved frames, and the flat aperture grill is maintained while maintaining the mutual positional relationship between the flat aperture grill and the aperture grill frame with high accuracy. Can be easily and highly accurately bridged by following a pair of curved frames.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an assembling method and an assembling apparatus for an aperture grill to which the present invention is applied will be described below with reference to FIGS. It should be noted that the same reference numerals are given to the same structural portions as those in FIGS. 16 to 19 and duplicate description will be omitted.

[Outline of Assembly Apparatus for Aperture Grill] First, an outline of an assembly apparatus for the aperture grill will be described with reference to FIGS.

First, the upper part of the fixed base unit 21 is formed on a horizontal reference base 21a, and a substantially square movable base 22 is horizontally arranged at the center position of the upper part of the reference base 21a.

The guide shafts 23 fixed vertically to the lower portions of the four corners of the movable base 22 are slidably inserted into the four guide cylinders 24 vertically attached to the lower portion of the reference base 21a. The movable base 22 is supported so as to be able to move up and down in parallel with the reference base 21a in the Z _a direction and the Z _b direction.

The lower ends of the four guide shafts 23 are connected by a single horizontal connecting frame 25, which is a driving means vertically and upwardly attached to the central portion of the lower part of the unit base 21 in the Z direction. The upper end of the cylinder rod 26a of the air cylinder 26 is connected to the center of the lower part of the connecting frame 25. Therefore,
The movable base 22 is moved to the Z direction by the Z direction air cylinder 26.
It is configured to be driven in parallel with the _a direction and the Z _b direction. The Z-direction air cylinder 26 has a Z
_A bellowram type air cylinder is used that can apply high pressure in the _b direction.

A rectangular horizontal table 27 for horizontally mounting the flat aperture grill 1 above the movable base 22 is provided with four vertical table stands 26.
It is horizontally attached at a position above the center of the movable base 22 by a.

A three-point support mechanism 28, which is a positioning means for the aperture grill frame 7, is attached to the upper part of the movable base 22 at a position below the outer circumference of the table 27.

Then, with the curved surfaces 8a, 9a of the pair of curved frames 8, 9 of the aperture grill frame 7 facing upward, the aperture grill frame 7 is horizontally placed on the outer periphery of the table 27 and above the three-point support mechanism 28. It is configured so that it can be mounted on and positioned.
At this time, the pair of connecting frames 10 and 11 of the aperture grille frame 7 are mounted on the upper portion of the three-point support mechanism 28. The three-point support mechanism 28 is provided with height adjusting means so that the pair of curved surfaces 8a and 9a of the mounted flat aperture grill 1 are slightly lower than the upper surface of the table 26.

A pair of pressure blocks 30 and 31, which are pressure means, are arranged on both sides of the pair of curved frames 8 and 9 of the aperture grille frame 7 positioned above the movable base 22. One pressure block 30 is fixed on the movable base 22, and the other pressure block 31 is slidable in the Y _a direction and the Y _b direction.

That is, a horizontal slide base 32 is slidably attached to the upper part of the movable base 22 in the Y _a direction and the Y _b direction via a pair of Y direction guide rails 33, and is mounted on the upper part of the slide base 32. The other pressure block 31 is mounted. The other pressure block 31 is centered on a vertical rotation center axis 34 arranged on the center P in the X direction, which is the length direction of the aperture grille frame 7, and the other pressure block 31 is Y in the horizontal plane with respect to the slide base 32. It is attached rotatably in the _c and Y _d directions.

A total of four pressers 30a, 31 having a self-aligning function are provided at both end positions in the X direction on the facing surfaces of the pair of pressure blocks 30, 31.
a is attached to these pressurizers 30a, 31
a is a pair of curved frames 8 and 9 of the aperture grille frame 7, two side surfaces 8b and 9b, each two in the X direction, a total of 4
It is configured such that the points can be mutually pressurized in the Y _b direction.

Then, press the other pressure block 31 to Y.
A drive mechanism 35 that drives in the _a direction and the Y _b direction is horizontally arranged along the center P. The drive mechanism 35 penetrates the one pressure block 30, and the screw shaft 36 rotatably attached to the pressure block 30 is engaged with the screw shaft 36, so that the slide base 32 is engaged. Nut 37 fixed to
And a handle shaft 39 mounted on the reference base 21a via a plurality of bearings 38 so as to be rotatable and movable in the Y _a direction and the Y _b direction, and the handle shaft 3 thereof.
It is constituted by a handle 40 fixed to one end of 9. Then, between the one end of the screw shaft 36 and the other end of the handle shaft 39, there is a Y _e direction and a Y _e direction.
_A coupling 41 that can be connected and disconnected in the _f direction is provided.

A pair of notches 30b along the center P are formed at the upper ends of the pair of pressure blocks 30 and 31.
31b is formed. And these notches 30
a pair of symmetrical support arms 4 horizontally inserted from both sides of the movable base 22 along the center P in the b and 31b.
The reference pin 44 and the positioning pin 4 are provided above the tips of the pins
5 is mounted vertically. At this time, the reference pin 44
Are arranged on the side of one pressure block 30 which is a fixed block, and the positioning pins 45 are arranged on the side of the other pressure block 31 which is a slide block.

Therefore, the reference pin 44 and the positioning pin 45 are arranged on the center P and are positioned on the movable base 22.
Are arranged in the vicinity of both sides of the pair of curved frames 8 and 9.

The end portions of the pair of support arms 42 and 43 on the opposite sides are horizontally supported in a cantilever manner on the upper portions of the pair of arm bases 46 and 47. Further, four guide shafts 48 fixed vertically to the lower portions of the pair of arm bases 46, 47 are slidably inserted into four guide cylinders 49 vertically attached to the reference base 21a. The pair of arm bases 46, 47 is configured to be movable up and down in parallel with the reference base 21a in the Z _a direction and the Z _b direction.

And each of the four guide shafts 4
The lower ends of 8 are connected by a pair of horizontal connecting frames 50. Then, the connecting frame 2 that is vertically driven in the Z _a direction and the Z _b direction by the air cylinder 26.
The height adjusting screws 51, which are a pair of abutting portions vertically attached to the upper ends of both ends in the Y direction of 5, are configured to be able to abut from below the central portions of the pair of connecting frames 50. Therefore, the movable base 22 and the two arm bases 4 are moved by one Z-direction air cylinder 26.
6 and 47 can be driven upward in the Z _b direction with a time difference.

As shown in FIGS. 7 and 9, the supporting arm 43 of the positioning pin 45 is slidably attached to the arm base 47 in the Y _a direction and the Y _b direction. The support arm 43 is moved to the Y _a direction and the Y _b direction by a Y direction air cylinder 52 which is a driving means having a small driving force and is attached to the upper part of the.
It is configured to be slidably driven in the direction.

X of the flat aperture grill 1
4 chuck mechanisms 54, 5 in total, sandwiching four corners in the Y and Y directions, and applying tension to the flat aperture grill 1 in two directions, the X direction and the Y direction.
5 is the upper part of the reference base 21a, X of the movable base 22
Center P on both sides in the Y direction with a space in the Y direction
Are arranged symmetrically with respect to.

Then, it is arranged on the reference pin 44 side, and X
A pair of symmetrical chuck mechanisms 54 facing each other
Is mounted on X _a direction and X _b direction slidably configured X direction slide base 56 on the reference base 21a, X _a direction and by an X-direction air cylinder 57 mounted on the reference base 21a It is configured to be driven in the _Xb direction.

Further, it is arranged on the side of the positioning pin 45,
A pair of symmetrical chuck mechanisms 54 opposed to each other in the X direction
Is the Y _a direction and the Y _b direction on the reference base 21a, and X
_The Y-direction slide base 58 and the X-direction slide base 59 that are slidably stacked in two directions at right angles to the _a direction and the X _b direction are mounted on top of a double slide base. At this time, the X-direction slide base 59 is mounted on the Y-direction slide base 58 which is driven in the Y _a direction and the Y _b direction by the Y-direction air cylinder 60 mounted on the reference base 21 _a. The X direction air cylinder 61 mounted on the base 58 is configured to drive the X direction slide base 59 on the Y direction slide base 58 in the X _a direction and the X _b direction. The chuck mechanism 55 is mounted on the upper part of the X-direction slide base 59, and the Y-direction slide base 58 and the X-direction slide base 59 separate the Y _a direction and the Y _b direction and the X _a direction and the X _b direction. It is configured to be driven in two orthogonal directions.

As shown in FIGS. 13 to 15, the pair of Y-direction slide bases 58 in the pair of double slide bases on which the pair of chuck mechanisms 55 on the positioning pin 45 side are mounted are provided on the reference base 21a. It is configured to slide in the Y _a direction and the Y _b direction along the pair of Y-direction guide rails 62, and the pair of X-direction slide bases 59 are the pair of Y-direction slide bases 58.
It is configured to slide in the X _a direction and the X _b direction along the X direction guide rail 63 provided above. Then, the pair of chuck mechanisms 54 on the reference pin 44 side
There has been configured to be slid only in the X _a direction and X _b along only the X-direction guide rails 63 a pair of X-direction slide base 56 which is mounted directly attached on the reference base 21a.

Then, a total of four chuck mechanisms 5 are provided.
Total of 4 X-direction air cylinders in 4, 55 5
The total force of the driving forces of 7 and 61 and the total force of the driving forces of the two Y-direction air cylinders 60 are set to have a relationship of approximately 1: 4.

[Description of Chuck Mechanism] Next, the chuck mechanisms 54 and 55 will be described with reference to FIGS. 13 to 15. Although the chuck mechanisms 54 and 55 have the same structure, FIGS. 13 and 15 show the chuck mechanism 55 mounted on the double slide base.

That is, the X-direction slide base 59 (56)
While long lower chuck arm 65 of arm length is is rotatably mounted in the Z _c direction and Z _d direction is the vertical direction via the horizontal rotation axis 67 of the upper portion clamping means. Then, an upper chuck arm 66 having a short arm length, which is the other of the sandwiching means, is provided above the substantially central portion of the lower chuck arm 65 in the longitudinal direction via a horizontal center axis of rotation 68 in the substantially Z _c direction and in the vertical direction. It is attached rotatably in the Z _d direction. The entire lower chuck arm 65 is urged to rotate in the Z _c direction about the rotation center shaft 67 by a tension coil spring 69 which is a rotation urging means, and the tip 65 of the lower chuck arm 65 is rotated.
a is brought into contact with a height adjusting screw 70, which is a vertical stopper mounted on the X-direction slide base 59 (56), and the lower chuck arm 65 is horizontally positioned.

A chuck air cylinder 71, which is a driving means, is attached to an upper part of the lower chat arm 65 on the side of the rotation center shaft 67 so as to be rotatable in the Z _e direction and the Z _f direction which are vertical directions via the rotation center shaft 72. Has been. The tip of the cylinder rod 71a of the chuck air cylinder 71 is connected to the lower chuck arm 65 and the upper chuck arm 66 by a boosting mechanism 75 using a pair of toggle links 73 and 74.

In the booster mechanism 75, one end of the pair of toggle links 73, 74 is connected to the lower chuck arm 65 and the upper chuck arm 66, respectively.
And the other ends of the pair of toggle links 73 and 74 are mutually connected by one connecting pin 78, and the tip of the cylinder rod 71a is rotatably connected to this connecting pin 78. . In addition,
On the Y-direction slide base 58 is an X stopper that restricts the movement amount of the X-direction slide base 59 in the X _a direction.
A direction adjusting screw 79 is attached.

[Description of Assembling Process of Aperture Grill] Next, the process of assembling the aperture grill will be described with reference to FIGS.
Will be described sequentially with reference to FIG.

[Standby State] First, in the standby state before the start of the assembling operation, as shown by the solid line in FIG. 13, the lower chuck arms 65 of all the chuck mechanisms 54 and 55 are moved by the tension coil spring 69 to adjust the height adjustment screw 70. The upper chuck arm 66 is brought into contact with the upper side and set in a horizontal state, and the upper chuck arm 66 is moved upwards about the rotation center axis 68 by approximately Z _d
Keep it open in the direction. In addition, one pressure block 30 shown in FIGS. 3 and 10 is different from the other pressure block 31.
Are separated in the Y _a direction.

[First Step] Next, at the start of assembly, as shown in FIGS. 4, 7, 8, 9, 10, and 11, a pair of curved frames 8 of the aperture grille frame 7 are provided. , 9 with the curved surfaces 8a and 9a facing upward,
The aperture grill frame 7 is inserted on the outer periphery of the table 27 between the pair of pressure blocks 30 and 31 in the Z _a direction, and the aperture grill frame is mounted on the three-point support mechanism 28 by the pair of connecting frames 10 and 11. Mounted on and positioned horizontally.

[Second Step] Next, the handle 40 of the drive mechanism 35 shown in FIG. 7 is pushed to the position shown by the solid line in the Y _e direction to rotate the coupling 41 in the clockwise direction or the like with the coupling 41 in the connected state. As shown in FIG. 10, the screw shaft 36 is rotationally driven via the handle shaft 39 and the coupling 41, and the screw base 36 is driven to slide by driving the slide base 32 in the Y _b direction. To do.

Then, as shown in FIGS. 4, 7, 9 and 10, the pair of pressurizers 31 of the other pressurizing block 31.
a presses the side surface 9b of the other curved frame 9 of the aperture grill frame 7 from the Y _b direction, and the side surface 8a of the one curved frame 8 of the aperture grill frame 7 has a pair of pressers 30a of one pressing block 30. Is pressed from the Y _b direction. As a result, lateral pressure from the Y _b direction is applied by the pair of pressure blocks 30 and 31 on both sides of the side surfaces 8 b and 9 b of the pair of curved frames 8 and 9,
The pair of curved frames 8 and 9 are bent so as to approach each other against elasticity in the Y _b direction. Then, the pair of curved frames 8 and 9 are charged with a bending reaction force in the Y _a direction which is _a direction away from each other.

At this time, one curved frame 8 of the aperture grille frame 7 is pressed against one pressure block 30 fixed on the movable base 22 from the Y _b direction, and the other curved frame 9 is pressed against the other curved frame 9. Pressure block 3
Since the lateral pressure is applied from the Y _b direction by 1, the pair of curved frames 8 and 9 of the aperture grille frame 7 are pressed in a state of being correctly positioned with reference to the reference pin 44.

At this time, Y _c about the rotation center axis 34 of the pressure block 31 with respect to the slide base 32 is taken as the center.
And Y _d direction self-centering function and four pressers 30
By the double self-aligning function in addition to the self-aligning function of a and 31a, both side surfaces 8b and 9b of the pair of curved frames 8 and 9 of the aperture grille frame 7 can be pressed in good balance.

[Third Step] Next, as shown in FIGS. 4, 7, 8, 9, 10, and 11, the X and Y directions of the flat aperture grill 1 are set to the X direction of the aperture grill frame 7. The flat aperture grill 1 is horizontally placed on the upper portion of the table 27 in a state of being aligned with the Y direction and the Y direction, and the pair of positioning holes 3 and 4 is inserted into the reference pin 44 and the positioning pin 45 from the Z _a direction. . At this time,
4 corners 1e of the flat aperture grill 1
The four lower chuck arms 65 of the one chuck mechanism 54, 55 are horizontally placed on top of the tips 65a.

[Fourth Step] Next, as shown in FIGS. 4, 7, 9 and 10, the positioning pin 45 is moved in the Y _a direction via the support arm 43 by the Y direction air cylinder 52 having a small driving force. And a weak tension in the Y _a direction with reference to the reference pin 44 is applied on the center P of the flat aperture grill 1. Then, the flat aperture grill 1 is tensioned horizontally on the table 27 and is correctly positioned with respect to the reference pin 44.

[Fifth Step] Next, referring to FIG. 11 and FIG.
As indicated by the dotted chain line, the cylinder rods 71a of the chuck air cylinders 71 of all the chuck mechanisms 54 and 55 are simultaneously projected in the Z _g direction, and the booster mechanism 75 causes the upper chuck arm 66 to move about the Z axis about the rotation center axis 68. _c
Direction of the upper chuck arm 66
6a is closed on the tip 65a of the lower chuck arm 65 so as to be crimped with high pressure, and the four corners 1e of the flat aperture grill 1 are raised from above and below between the tips 65a, 66a of the lower and upper chuck arms 65, 66. Hold by pressure.

At this time, as shown by the alternate long and short dash line in FIG. 13, the dead point where the connecting pin 78 of the pair of toggle links 74 and 75 connects the centers of the two connecting pins 76 and 77 is set to the upper chuck arm 66. From the rotation center axis 68 side toward the tip 66a side, and the pair of toggle links 7
4, 75 are automatically locked, and the lower and upper chuck arms 65, 66 are integrally connected.

Therefore, the upper and lower chuck arms 65, 66 of all the chuck mechanisms 54, 55 are automatically locked in the closed state, and the high pressure sandwiching state of the four corners 1e of the flat aperture grill 1 by these is maintained thereafter. It

[Sixth Step] Next, as shown in FIGS. 3, 7, 10 and 11, the pair of chuck mechanisms 54 on the reference pin 44 side are moved in the X _a direction which is _a direction away from each other. , The pair of chuck mechanisms 55 on the positioning pin 45 side are moved in the XY _a direction and the XY _b direction, which are directions away from each other about the reference pin 44 in an oblique direction,
X in the four corners 1e of the flat aperture grill 1
_a direction, pulling the XY direction _a and XY _b directions.

Then, the flat aperture grill 1 remains positioned on the center P with high precision by the reference pin 44 and the positioning pin 45, and the flat aperture grill 1 is aligned with the X direction which is the longitudinal direction in one horizontal plane. The flat aperture grill 1 is tensioned in the horizontal plane by applying high tension in two directions, that is, the Y direction which is the width direction.

At this time, with respect to the pair of chuck mechanisms 54 on the side of the reference pin 44, the pair of X-direction slide bases 56 is moved by the pair of X-direction air cylinders 57.
_By driving linearly in the _a direction, the pair of chuck mechanisms 54 are linearly moved in the X _a direction.

Regarding the pair of chuck mechanisms 55 on the positioning pin 45 side, the pair of Y-direction air cylinders 60
X _a pair of Y-direction slide base 58 at the same time is moved linearly in the Y _b direction, on the pair of Y-direction slide base 58, a pair of X-direction slide base 59 by a pair of X-direction air cylinder 61 by By driving the pair of chuck mechanisms 54 linearly in the X and Y directions, the XY which is the direction of the resultant force of the Y _b direction and the X _a direction.
_It is moved linearly in two diagonal directions, the _a direction and the XY _b direction. At this time, as shown in FIG. 13, the X-direction slid base 59 is brought into contact with the X-direction adjustment screw 79 of the Y-direction slide base 58 to regulate its position.

At this time, the X force applied to the flat aperture grill 1 is determined by the ratio of the total force of the driving forces of the four X-direction air cylinders 57 and 61 to the total force of the driving forces of the two Y-direction cylinders 60. Direction tension,
The relationship with the tension in the Y direction is approximately 1: 4.

As a result, it is possible to maintain a high degree of parallelism in the interlaced slits 2a forming the color selection electrode main portion 2 of the flat aperture grill 1 while maintaining a high degree of tension, and the slits 2a are distorted or loosened. Etc. does not occur at all.

[Seventh Step] Next, as shown by the one-dot chain line in FIG. 7, the handle 40 is pulled in the Y _f direction, and as shown by the one-dot chain line in FIG. Is separated from the screw shaft 36 in the Y _f direction to separate the coupling 41.

[Eighth Process] Next, FIG. 2, FIG. 6 and FIG.
As shown in FIG. 2, the cylinder rod 26a of the Z direction air cylinder 26 is pushed up in the Z _b direction to move the connecting frame 2
4 guide shafts 23 are simultaneously pushed up in the Z _b direction via 5.

Then, the movable base 22 is pushed up in parallel with the Z _b direction, the aperture grill frame 7 positioned on the movable base 22 is raised in the Z _b direction, and the pair of curved frames 8, 9 are formed. Curved surface 8a of
9a is the main part 2 of the color selection electrode of the flat aperture grill 1.
Are pressed against the pair of welding regions S ₁ on both sides in the Y direction in parallel with high tension in the Z _b direction which is a direction perpendicular to the flat aperture grill 1.

At this time, by using a belofram type air cylinder as the Z direction air cylinder 26, the pair of curved frames 8 and 9 are attached to the flat aperture grill 1 in the Z direction.
It can be pressed with high pressure from the _b direction.

At this time, as shown in FIG. 13, the flat aperture grill 1 is pushed up in the Z _b direction by the pair of curved curved surfaces 8a and 9a of the aperture grill frame 7, and the flat aperture grill 1 and the pair of curved curved surfaces 8a.
It is closely adhered in an arc shape following a and 9a.

At this time, all chuck mechanisms 54, 5
5, the lower and upper chuck arms 65 and 66 are integrally formed, and the tension coil spring 69 is centered around the rotation center shaft 67.
The lower and upper chuck arms 65 and 66 are naturally turned upward along the pair of curved surfaces 8a and 9a by rotating in the Z _d direction against.

At this time, X _b, which is a direction in which the lower and upper chuck arms 65 and 66 approach each other.
Direction of the tensile force acts, is the direction in which the X-direction slide base 56, 58 all chuck mechanism 54 and 55 are mounted close to each other against the air pressure of the X-direction air cylinder 57, 61 X _b Automatically moved in the direction,
The air pressure reaction force of the X direction air cylinders 57 and 61 in the X _a direction causes the X of the flat aperture grill 1 to move.
The tension in the _a direction is further increased.

As a result, the flat aperture grill 1 is subjected to a high tension in the two directions of the X direction and the Y direction, and a pair of curved curved surfaces 8a of the aperture grill frame 7 are provided.
The flat aperture grill 1 is bridged between the pair of curved curved surfaces 8a and 9a with high precision in a manner that closely follows the curved curved surfaces 8a and 9a without fail and in close contact with the curved curved surfaces 8a and 9a. Of course, flat aperture grill 1
The parallel accuracy of the slit 2a in the shape of a blind grid remains highly maintained.

At this time, as shown in FIG. 13, Z _b
A pair of height adjustment screws 51 of the connecting frame 25 is pushed up in the direction with a slight time difference from Z _b direction in the central portion of the pair of the connecting frame 50 are abutting, the movable base is raised to Z _b direction The pair of arm bases 46, 47 is lifted in the Z _b direction with a slight time difference with respect to 22.

Therefore, when the aperture grille frame 7 is pushed up to the flat aperture grille 1 from the Z _b direction, the reference pin 44 and the positioning pin 45 are integrally formed with the pair of support arms 42 and 43 by the pair of arm bases 46 and 47. At the same time, it can be raised in the Z _b direction.

As a result, when the flat aperture grill 1 is pushed up in the Z _b direction by the aperture grill frame 7, the reference pin 44 and the positioning pin 4 for the pair of positioning holes 3 and 4 of the flat aperture grill 1 are positioned.
It is possible to stably secure the engagement state with the flat aperture grill 5 and secure the positioning accuracy of the center P of the flat aperture grill 1 with respect to the center P of the aperture grill frame 7 at a high level, and to secure the flat aperture grill 1 with the aperture grill frame. It is possible to adhere to the pair of curved surfaces 8a and 9a of 7 with high accuracy.

[Ninth Step] Next, as shown in FIGS. 1 and 12, a pair of electrode rollers 17 as welding means are pressure-bonded onto the pair of welding regions S ₁ of the flat aperture grill 1 to form electrode rollers. While guiding the pair of electrode rollers 17 by a copying mechanism (not shown), the pair of electrode rollers 17 are rolled in the X _c direction along the pair of curved surfaces 8a and 9a of the aperture grill frame 7, A pair of welding regions S ₁ of the flat aperture grill 1 are seam-welded 18 in an arc shape on the pair of curved surfaces 8 a and 9 a of the aperture grill frame 7.

With the above, all the steps of assembling the aperture grille are completed. Therefore, all the air cylinders are decompressed, the aperture grill frame 7 is taken out from the movable base 22, and the periphery of the color selection electrode main portion 2 of the flat aperture grill 1 shown in FIG. 16 is formed into a pair of slits 5 and perforations 6. By cutting along, the finished product of the aperture grill shown in FIG. 5 can be obtained.

In the finished aperture grille shown in FIG. 5, the pair of pressure blocks 30 and 31 are naturally used from the Y _b direction applied to both sides of the pair of curved frames 8 and 9 of the aperture grille frame 7. Side pressure has already been released. Therefore, due to the bending reaction force in the Y _a direction which is _a direction in which the pair of curved frames 8 and 9 of the aperture grille frame 7 are precharged, the flat aperture grille 1 has a grid-shaped grid pattern of the color selection electrode main portion 2. Tension in the X direction, which is the length direction of the slit 2a, is given as an initial stress, and the parallel accuracy of the slit 2a is semipermanently secured.

According to the method and apparatus for assembling the aperture grille assembled as described above, as shown in FIG. 6, both end edges 1a, 1b in the Y direction which is the width direction of the flat aperture grill 1 are provided. , Only a pair of positioning hole regions S ₂ need to be provided outside the pair of welding regions S ₁ , and a pair of sandwiching margins S ₃ by the total of four chuck blocks 15 and 16 required in the prior application example are removed. be able to.

Therefore, this flat aperture grill 1
The minimum required width Y ₆ in the Y direction is the width Y _{5 of the} previous application.
Compared to, can be reduced by twice equivalent of the pair of clamping allowance S _{3. That, Y 6 = Y 5 -2S 3} . As a result, the waste of material removal from the original material of the flat aperture grill 1 is significantly reduced, and the material cost of the flat aperture grill 1 can be reduced to about 1/2 of that of the previous application.

Moreover, according to this aperture grill assembling apparatus, the flat aperture grill 1 is made to follow the pair of curved surfaces 8a and 9a of the aperture grill frame 7 by utilizing the tension of the flat aperture grill 1. Since it can be brought into close contact with each other, it can fully respond to changes in the size and shape of the aperture grill,
It is possible to assemble a wide variety of products with one assembly device.

The above is a description of one embodiment of the present invention.
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

[0086]

The assembling method and the assembling apparatus of the aperture grill of the present invention constructed as above have the following effects.

According to a first aspect of the present invention, there is provided a method for assembling an aperture grill, wherein a pair of curved frames of the aperture grill frame are flattened in a state in which tension is applied to the flat aperture grill in two directions of a length direction and a width direction. By pressing in parallel to the aperture grill from a direction perpendicular to the flat aperture grill, the flat aperture grill can be closely adhered following the pair of curved frames so that the flat aperture grill can be tensioned and bridged between the pair of curved frames. Therefore, it is not necessary to provide a sandwiching margin for sandwiching the chuck block with the chuck block as in the previous application example at both end edges in the width direction of the flat aperture grill, and the flat aperture grill with a width much smaller than that of the previous application example. Can be used. Therefore, it is possible to reduce the waste of material removal from the original material of the flat aperture grill and to significantly reduce the material cost of the flat aperture grill.

According to a second aspect of the present invention, the pair of bending frames of the aperture grille frame are applied at a right angle to the flat aperture grille in a state in which the pair of bending frames are pressed against each other against the elasticity so as to be pressed toward each other. And a step of pressing the flat aperture grill in the width direction at both end edges in the width direction to the pair of curved frames of the aperture grill, and then releasing the lateral pressure applied to the pair of curved frames. Therefore, the flat aperture grill of the aperture grill that has been assembled can be applied with tension in the width direction as an initial stress by the bending reaction force of the pair of curved frames of the aperture grill frame in the direction away from each other. To secure semi-permanently the parallel accuracy of the blind grid. It can be.

According to a third aspect of the present invention, in the aperture grill assembling apparatus, a pair of positioning holes formed at both ends in the width direction are engaged with the reference pin and the positioning pin on the center in the length direction of the flat aperture grill, The positioning pin applies tension in the width direction to the flat aperture grill to position the flat aperture grill with respect to the reference pin. Then, the four corners of the flat aperture grille are sandwiched by a total of four chucking mechanisms, and these chucking mechanisms apply tension to the flat aperture grille in two directions, a lengthwise direction and a widthwise direction, within one plane with reference to the reference pin. Add. Then, the pair of curved frames of the aperture grille frame are pressed parallel to the flat aperture grille from the direction perpendicular to the movable base on which the aperture grille frame is positioned by the positioning means, so that the flat aperture grille is closely adhered following the paired curved frame. In this way, the flat aperture grill is tensioned and bridged between the pair of curved frames, and the flat aperture grill is maintained while maintaining the mutual positional relationship between the flat aperture grill and the aperture grill frame with high accuracy. Can be bridged with high accuracy following a pair of curved frames. And, there is no need to provide a sandwiching margin for sandwiching with the chuck block in the width direction of the flat aperture grill as in the case of the previous application, and a flat aperture grill having a width extremely smaller than that of the previous application is completely eliminated. Can be used. Therefore, it is possible to reduce the waste of the material taken from the raw material of the flat aperture grill, and to significantly reduce the material cost of the flat aperture grill.

According to the third aspect, it is not necessary to use a chuck block having a chuck surface that is machined with a high precision to the same radius of curvature as the curved surface of the curved surfaces of the pair of curved frames of the aperture grill frame as in the case of the prior application. The chuck mechanism allows the flat aperture grill to be tensioned in the length and width directions in one plane, and by pressing the aperture grill frame from the direction perpendicular to the flat aperture grill with a movable base, the flat aperture grill is paired with a pair of curved surfaces of the aperture grill frame. Since they are brought into close contact with each other in accordance with, the assembly can be performed with high accuracy by using the inexpensive chuck mechanism and the movable base.

According to the third aspect of the present invention, it is necessary to use a chuck block for holding both widthwise edges of the flat aperture grill with a high holding force and pulling the flat aperture grill with a high tension in the width direction as in the prior application. Since there is no need for a hydraulic cylinder for driving the chuck block at high pressure, maintenance costs can be reduced.

According to the third aspect of the present invention, it is not necessary to use a chuck block having a chuck surface highly accurately processed to have the same radius of curvature as the curved surface of the curved surfaces of the pair of curved frames of the aperture grille frame as in the case of the prior application. The chuck mechanism allows the flat aperture grill to be tensioned in the length and width directions in one plane, and by pressing the aperture grill frame from the direction perpendicular to the flat aperture grill with a movable base, the flat aperture grill is paired with a pair of curved surfaces of the aperture grill frame. As described above, the assembling is performed so that a single assembling apparatus can assemble a wide variety of products corresponding to the changes in the size and shape of the aperture grill, and the equipment cost can be significantly reduced.

According to a fourth aspect of the present invention, the two chuck mechanisms on the reference pin side among the four chuck mechanisms are rotatably mounted on a slide base which is slid in the length direction of the flat aperture grill, and the positioning pin is provided. Since the two side chuck mechanisms are rotatably mounted on the double slide base that slides in the length direction and the width direction of the flat aperture grill, the flat aperture grill can be used by using the four chuck mechanisms. The tension can be effectively applied in the two directions of the length direction and the width direction, and the simplification of the structure and the cost reduction can be promoted.

According to a fifth aspect of the present invention, one curved frame on the reference pin side of the aperture grille frame is used as a reference, and the side surface of the other curved frame on the positioning pin side is resisted against elasticity to one curved frame side. By providing a pair of pressure blocks that apply side pressure to both side surfaces of the pair of curved frames by pressing, a pair of pressure blocks is applied to the both side surfaces of the pair of curved frames by the pair of pressure blocks. The curved frame is pressed parallel to the flat aperture grill from a direction perpendicular to the flat aperture grill, and both end edges in the width direction of the flat aperture grill are welded to the pair of curved frames by the pair of welding means, and then the pair of pressurization frames are pressed. Since the block is configured to release the lateral pressure applied to both sides of the curved frame, the assembly is completed. The flat aperture grille of the above-mentioned aperture grille applies a tension in the width direction as an initial stress by the bending reaction force of the pair of curved frames of the aperture grille frame in the direction of moving away from each other, thereby improving the parallelism of the flat grid of the flat aperture grille. The mechanism for securing semi-permanently can be greatly simplified.

According to a sixth aspect of the present invention, when the pair of curved frames of the aperture grill frame is pressed against the flat aperture grill by the movable base, the reference pin and the positioning pin are moved in the same direction as the movable base. Since it is configured, it is possible to press the aperture grill frame against the flat aperture grill in a state where the reference pin and the positioning pin are engaged with the pair of positioning holes of the flat aperture grill and the flat aperture grill is positioned with high accuracy. As a result, the flat aperture grill can be bridged with high precision between the pair of curved frames of the aperture grill frame.

A seventh aspect of the present invention is a means for applying tension in the width direction of the flat aperture grill by the positioning pin,
A means for applying tension to the flat aperture grill in two directions, a length direction and a width direction, in one plane by the four chuck mechanisms, and a pair of curved frames of the aperture grill frame to the flat aperture grill by the movable frame. Since the air cylinders are used for the means for pressing in parallel from the perpendicular direction and the pressure means of the pair of pressure blocks, the maintenance cost can be reduced.

According to the eighth aspect, the tension in the length direction and the tension in the width direction applied to the flat aperture grill are approximately 1 :.
Since it is set to 4, the parallel precision of the interdigital slits of the flat aperture grille can be ensured with high precision, and a high quality aperture grille can be assembled.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a step of adhering a flat aperture grill to an aperture grill frame and a seam welding step in an assembling process in an embodiment of an assembling method of an aperture grill and an assembling apparatus to which the present invention is applied. .

FIG. 2 is a perspective view illustrating a step of pressing the aperture grille frame against the flat aperture grille, which is the previous step of FIG.

FIG. 3 is a perspective view illustrating a tension applying process in a length direction and a width direction of the flat aperture grill, which is a previous process of FIG.

FIG. 4 is a perspective view illustrating a step of positioning the aperture grill frame on the movable base, a step of applying a lateral pressure of the aperture grill frame, and a step of horizontally mounting the flat aperture grill, which are the preceding steps of FIG. 3;

FIG. 5 is a perspective view of the aperture grille whose assembly has been completed by the completion of the above respective steps.

6A and 6B are a perspective view and a cross-sectional view for explaining the size of the flat aperture grill in the width direction.

FIG. 7 is a plan view of the entire aperture grill assembling apparatus of the present invention.

FIG. 8 is a side view taken along the line AA of FIG.

9 is a side view taken along the line BB of FIG. 7.

10 is an enlarged plan view of the movable base portion of FIG. 7. FIG.

FIG. 11 is an enlarged side view of FIG. 8 and is a drawing explaining a state in which tension is applied to the flat aperture grill in a horizontal plane.

FIG. 12 is an enlarged side view of FIG. 8 and is a drawing explaining a state in which the aperture grille frame is pressed against the flat aperture grille.

13 is a side view of the chuck mechanism taken along the line CC in FIG.

FIG. 14 is a plan view of FIG.

FIG. 15 is a side view taken along the line DD of FIG.

FIG. 16 is an exploded perspective view illustrating a flat aperture grill and an aperture grill frame which constitute the aperture grill.

FIG. 17 is a perspective view illustrating an aperture grille assembling apparatus according to a prior application example.

FIG. 18 is a side view and a cross-sectional view of the chuck block shown in FIG.

FIG. 19 is a perspective view illustrating the size in the width direction of the flat aperture grill used in the prior application example.

[Explanation of symbols]

1 Flat Aperture Grill 1a, 1b Edges in the width direction of the Flat Aperture Grill 1c, 1d Edges in the length direction of the Flat Aperture Grill 1e Four corners of the flat aperture grill 2 Color selection electrode main part 2a Color selection electrode main part Constituting slits 3, 4 Positioning holes 7 Aperture grill frame 8, 9 Aperture grille curved frame 8a, 9a Flat aperture grille curved frame curved surface 10, 11 Flat aperture grill connecting frame 17 Electrode roller ( Welding means 21 Base unit 21a Base unit reference base 22 Movable base (pressing means) 23 Guide shaft (parallel moving means) 24 Guide cylinder (parallel moving means) 25 Connecting frame 26 Z direction air cylinder -(Moveable base drive means) 27 Table (Flat aperture grill mounting means) 28 Three-point support mechanism (Aperture grill frame positioning means) 30, 31 Pressure block (side pressure applying means) 35 Drive mechanism (pressure block) Driving means) 42, 43 support arm 44 reference pin (positioning means for flat aperture grill) 45 positioning pin (positioning means for flat aperture grill) 46, 47 arm base 48 guide shaft (translating means) 49 guide cylinder (translating means) Means) 50 Connection frame 51 Height adjustment screw (contact means) 52 Y direction cylinder (positioning pin driving means) 54, 55 Chuck mechanism 56, 59 X direction slide base (chuck mechanism moving means) 57, 61 X direction Air cylinder (chuck machine 58 Y direction slide base (chuck mechanism moving means) 60 Y direction air cylinder (chuck mechanism moving drive means) 65 Lower chuck arm (flat aperture grill holding means) 66 Upper chuck arm (flat aperture grill) 69) Tensile coil spring (rotation urging means of chuck mechanism) 70 Stopper (positioning means of chuck mechanism) 71 Chuck air cylinder (drive means of chuck arm) 72 Rotation center shaft 75 Booster mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihisa Onishi 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (8)

[Claims] 1. A step of applying tension to a flat aperture grill in two directions, a lengthwise direction and a widthwise direction, in one plane, and a pair of curved frames of an aperture grille frame is applied to the flat aperture grill to which the tension is applied. By pressing the flat aperture grills in parallel from a right angle direction so that the flat aperture grills closely follow the pair of curved frames, the flat aperture grills are tensioned and bridged between the pair of curved frames. A method of assembling an aperture grill, comprising the step of welding both widthwise edges of the flat aperture grill thus formed along a pair of curved frames of the aperture grill frame. 2. A pair of bending frames of the aperture grille frame are parallel to each other from a direction perpendicular to the flat aperture grille in a state in which a side pressure is applied to the pair of bending frames against each other against elasticity so as to approach each other. And a step of releasing the lateral pressure applied to the pair of curved frames after welding the both end edges in the width direction of the flat aperture grill to the pair of curved frames of the aperture grill. The method for assembling the aperture grill according to claim 1. 3. A reference pin and another positioning hole engaged with one positioning hole of a pair of positioning holes formed at both ends in the width direction on the center of the flat aperture grill in the length direction. Aligned with the positioning pin that applies a tension in the width direction to the flat aperture grill and the four corners of the flat aperture grill, the flat aperture grill is lengthwise in one plane with the reference pin as a reference. The four chuck mechanisms for applying tension in two directions, namely, the width direction and the width direction, and the aperture grill frame are positioned by the positioning means, and the pair of curved frames of the aperture grill frame are perpendicular to the flat aperture grill to which the tension is applied. The flat aperture grille by pressing in parallel from different directions. The movable base is designed so that the flat aperture grills are closely contacted to each other so that the flat aperture grills are tightly bridged between the pair of curved frames, and both end edges in the width direction of the bridged flat aperture grills are connected to the apertures. An apparatus for assembling an aperture grill, comprising: welding means for welding along a pair of curved frames of the grill. 4. Two of the four chuck mechanisms on the side of the reference pin are rotatably mounted on a slide base which is slid in the length direction of the flat aperture grill, and two chuck mechanisms on the side of the positioning pin are provided. 4. The apparatus for assembling an aperture grill according to claim 3, wherein one chuck mechanism is rotatably mounted on a double slide base which is slid in two directions of a length and a width of the flat aperture grill. 5. The side surface of the other curved frame on the side of the positioning pin is pressed against one curved frame side against elasticity with reference to the curved frame on the side of the reference pin of the aperture grille frame. According to the above, a pair of pressurizing blocks for applying lateral pressure to both side surfaces of the pair of curving frames are provided. The flat aperture grill is pressed in parallel from a direction perpendicular to the flat aperture grill, and both widthwise edges of the flat aperture grill are welded to the pair of curved frames by the pair of welding means, and then paired by the pair of pressure blocks. 4. The lateral pressure applied to both side surfaces of the curved frame of FIG. 3 is released.
Alternatively, the aperture grill assembling apparatus according to claim 4. 6. The movable base is configured to move the reference pin and the positioning pin in the same direction as the movable base when the pair of curved frames of the aperture grill frame are pressed against the flat aperture grill. The aperture grill assembling apparatus according to claim 3, 4, or 5, wherein: 7. A means for applying a tension in the width direction of the flat aperture grill by the positioning pin, and a tension in the flat aperture grill in the two directions of a length direction and a width direction in one plane by the four chuck mechanisms. An air cylinder is used as the adding means, the means for pressing the pair of curved frames of the aperture grill frame by the movable frame in parallel from the direction perpendicular to the flat aperture grill, and the pressing means of the pair of pressure blocks. Claim 3 or Claim 4 characterized
Alternatively, the aperture grill assembling apparatus according to claim 5 or claim 6. 8. The tension in the length direction and the tension in the width direction applied to the flat aperture grill are set to about 1: 4, respectively. Alternatively, the method and apparatus for assembling the aperture grill according to claim 5, 6 or 7.