JP3514006B2 - Aperture grill welding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aperture grill in which a slit in the vertical direction (vertical scanning direction, which may be referred to as "Y direction" hereinafter) is formed as a hole through which electron beams of three primary colors pass. The present invention relates to an aperture grill welder (hereinafter referred to as "AG welder") that is welded to a frame.

[0002]

2. Description of the Related Art Some color cathode ray tubes use an aperture grill as a color selection electrode in which slit holes formed seamlessly in the vertical direction are used as holes through which electron beams of three primary colors pass. Such an aperture grill includes a pair of support pieces (often referred to as A members) extending in the lateral direction (which means the horizontal scanning direction, and may be hereinafter referred to as "X direction"), and it. Supports the vertical direction (Y direction)
It is welded to the pair of supporting members of the frame, which is composed of a pair of elastic members (often referred to as B members) extending in the direction.

FIG. 6 is a perspective view showing a color selection electrode. In FIG. 6, 1 is a substantially rectangular frame, 2 is an aperture grill (mask), and L is a large number of linear strips (grill tape) constituting the aperture grill. , SL are slits formed between the adjacent filaments L and L, and the slits SL are holes through which the electron beams of the three primary colors pass. 3 and 3 are damper wires,
In order to suppress the vibration of a large number of filaments L, they are mounted in the X direction via damper springs 6, 6 (one 6 does not appear in the drawing). Incidentally, 1A and 1A are supporting members of the frame 1, and 1B and 1B are elastic members. Reference numeral 4 is a holder, and 5 is a spring, which are attached to the frame 1, respectively.

7 (A) and 7 (B) are perspective views for explaining a conventional example of a method for welding the aperture grill 2 to the supporting members 1A, 1A of the frame 1, and FIG. 7 (A) shows the state before welding. (B) shows a flat aperture grill forming strip which is wound in a roll shape. 2a is a flat aperture grill in which an aperture grill 2 is formed. A large number of flat aperture grills are formed in a row on a strip-shaped plate 2A wound in a roll,
It has a peripheral 2P, and the width of the peripheral 2P in the vertical direction, that is, the width of the clamp margin is, for example, 110.
Relatively large at mm or more The flat aperture grills 2a are individually separated by cutting the band-shaped body 2A, a large number of them are set in a FAG magazine portion (not shown) adjacent to the welding machine, and the flat aperture grills 2a are supplied one by one to the AG welding machine.

In order to weld the flat aperture grill 2a to the frame 1, a pair of clamping blocks 11a and 12a are placed on the base 10 of the welding machine so that both ends in the vertical direction of the flat aperture grill 2a are placed. And arrange them in parallel. This clamp block 1
The upper surfaces of 1a and 12a are cylindrical surfaces having the same curvature as the cylindrical surface of the frame 1. This clamp block 11a,
The upper and lower ends in the vertical direction of the flat aperture grill 2a separated from the strip plate 2A and set in the FAG magazine part are placed on 12a, and the lower surface of the clamp has the same cylindrical surface as the clamping blocks 11a and 12a. The plates 11b and 12b are placed, and pressure is applied on the plates 11b and 12b to firmly clamp the flat aperture grill 2a.

The members 11a and 11b and the member 12
A force is applied to a and 12b in the direction of increasing the distance between them, while a force between the support members 1A and 1A is applied in the direction of decreasing the distance between the support members against the elastic force of the elastic members 1B and 1B. In that state, the flat aperture grill 2a is welded to the supporting members 1A and 1A of the frame 1, and thereafter, an unnecessary portion of the flat aperture grill 2a, that is, the peripheral 2P is cut off. By cutting off the peripheral 2P, the flat aperture grill 2a becomes an aperture grill.

[0007]

By the way, in the prior art, as shown in FIG. 7B, one strip 2A having flat aperture grills 2a formed in a line was used as the aperture grill material. ,However,
When such an aperture grill material is used, the width of the peripheral 2P is very wide, so that the material is wasted a lot, which is one of the factors that hinder the cost reduction.

Therefore, recently, it has been attempted to use, as a material for the aperture grille, one strip-shaped body in which the aperture grilles 2a each having a narrow peripheral are formed in two rows. This is because not only it is possible to reduce the waste of materials, but also it is possible to increase the manufacturing efficiency of manufacturing the aperture grille 2a on the strip,
This is a factor that cannot be ignored and enables cost reduction. FIG. 8 shows such a strip. However, according to the conventional AG welding machine, because the peripheral 2P is narrowed, the clamper including the clamp blocks 11a and 12a and the clamp restraining plates 11b and 12b has a small clamp margin and cannot be grasped. There was a problem that it could not be applied to such band-like bodies.

Further, according to such a conventional AG welder, the clamper including the clamp blocks 11a and 12a and the clamp restraining plates 11b and 12b is considerably expensive, and the size of the aperture grill is large. It is necessary to replace them, and there is a problem that they are not versatile with respect to the type (tube type) of the color cathode ray tube. This leads to an increase in equipment costs, a decrease in the operating rate of the AG welding machine due to the replacement of members, and eventually a cost increase.

Therefore, the flat aperture grill is
Positioning in the X direction (horizontal direction), Y direction (vertical direction), and rotation direction (hereinafter also referred to as "θ direction" in some cases) with a positioning taper pin that fits in the central positioning hole of the upper side and the lower side. Then, with the four corners of the flat aperture grill pulled outward by clampers, the upper and lower parts of the frame (upper and lower parts in the Y direction)
We have developed an AG welder that presses and welds the above to the upper part and the lower part (the upper part and the lower part in the Y direction) of the slit forming part of the flat aperture grill from the lower side. Flat 6-21631
No. 4 and Japanese Patent Application No. 6-331451 have been proposed by the applicant company.

FIG. 9 is a perspective view for explaining such a technique, and is the drawing FIG. 1A itself attached to the application of Japanese Patent Application No. 6-216314. Here, the technique will be briefly described with reference to the same drawing. The flat aperture grill 2a is hidden by the flat plate for supporting the aperture grill of the AG welding machine (in FIG. 9, hidden by the flat aperture grill 2a. ) And place the four corners of the flat aperture grill 2a
The flat aperture grill 2a is kept horizontal by being strongly clamped by the clampers 16a to 16d of the welding machine and pulled outward. Then, in this state, the frame 1 is pushed up from below the flat aperture grill 2a and welded to the peripherals 2P, 2P. Numerals 17a and 17b are handles attached to the front and rear of the aperture grill supporting flat plate 17 for keeping the aperture grill supporting flat plate 17 horizontal.

The flat plate 17 for supporting the aperture grill
Had a size to fit inside the frame 1. That is, the height (length in the X direction) is smaller than the distance between the pair of support members 1a and 1a of the frame 1, and the length (length in the Y direction) is smaller than the distance between the pair of elastic members 1B and 1B. It was Otherwise, that is, if you make it bigger,
This is because it is not possible to push up the frame 1 from below and bring it into contact with the flat aperture grille 2a.

[0013]

By the way, the technique already applied for by the applicant is that when the flat aperture grill from the FAG magazine part is set in the AG welding machine, a flat plate (table) having a size that can be accommodated inside the frame is provided. Since the flat aperture grill 2a is supported by the support flat plate 2a, the ratio of the area supported by the support flat plate 17 to the area of the flat aperture grill 2a is small. Therefore, when the flat aperture grill 2a is supported, the flat aperture grill 2a bends. In particular, there is a problem in that bending occurs in the X direction. Such bending is not preferable because it may cause deformation of the flat aperture grille or AG wrinkles.

The present invention has been made in order to solve such a problem. A flat aperture grill having a large number of slits extending in the Y direction, through which an electron beam passes, is provided with an upper side and a lower side. With the positioning taper pin that fits into the positioning hole in the center of the X direction, Y direction and θ
In the direction, and the four corners of the flat aperture grill are pulled outward by the clampers, the upper and lower portions of the frame are placed on the upper and lower portions of the slit forming portion of the flat aperture grill on the rear side thereof. In an AG welding machine that presses and welds from above, the purpose is to be able to support it with a supporting flat plate so that no bending occurs until the flat aperture grill is set in the AG welding machine and then pulled or brought into contact with the frame. And

[0015]

An AG welding machine according to claim 1 has a support mechanism for supporting the flat aperture grill to be welded to a frame, the support mechanism having a size to be accommodated in an inner portion of the frame. A central supporting flat plate, a left movable supporting flat plate and a right movable supporting flat plate which are positioned at the same height on both the left and right sides of the central supporting flat plate so as to be movable in the X direction, and both of the movable supporting flat plates are moved in the X direction to move the center. And a flat plate moving device which is placed in a state of being close to a side edge of the support flat plate and a state of being separated from the side edge of the support flat plate.

Therefore, according to the AG welding machine of claim 1,
When supporting the flat aperture grill, the movable support plates on the left and right sides are brought close to the central support plate, and the substantial length of the support plate is temporarily the same as that of the flat aperture grill by the central support plate and the movable support plates on the left and right sides. It can be made longer and can support the flat aperture grill in that state. Therefore,
Eliminates the risk of the flat aperture grill bending during support. When pressing the frame against the lower surface of the flat aperture grill, it is sufficient to move the left and right movable support plates and separate them from the central support plate, and the left and right movable support plates prevent welding of the flat aperture grill to the frame. Things can be avoided.

The AG welder of claim 2 is the AG welder of claim 1.
In the welding machine, each clamper that pulls the four corners of the flat aperture grill has a T-shaped pin that comes into head contact with one surface of the original plate and a hexagon socket set screw that comes into contact with the other surface of the original plate at its tip surface. It is characterized by using.
Therefore, according to the AG welding machine of claim 2, since the main portion for directly grasping the flat aperture grill of the clamper is composed of the T-shaped pin and the hexagon socket set screw, it is possible to use a commercially available product and to procure parts to be used. , Easy to replace and cheaper cost.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a perspective view showing a state in a tension applying process for a flat aperture grill of one embodiment of an AG welder of the present invention, FIG. 2 is a perspective view showing an outline of a support mechanism, and FIG. 3 is a main part of a clamper. FIG.

In the drawings, 1 is a frame to which an aperture grill is welded, 1A and 1A are supporting members of the frame 1, to which the aperture grill is welded. 1B and 1B are elastic members of the frame 1. 2a
Is a flat aperture grill, which is conveyed from the FAG magazine portion (not shown) of the AG welding machine and is conveyed to the welding portion. As shown in FIG. 8, the flat aperture grill 2a is separated from the strip 2A in which the aperture grills 2a are formed in two rows, and the peripheral 2P is narrow.

Numerals 2h and 2h are positioning holes formed in the central portions of the upper and lower sides of the flat aperture grill 2a, and one positioning hole 2h has a fixed positioning pin whose diameter is fixed in the X and Y directions (for example, a diameter of 2 mm). ) 2
0 is fitted, and the other positioning hole 2h moves outward in the Y direction to move the flat aperture grill 2a to the X position.
Movable positioning pins 22 for positioning in the Y, Y, and θ directions are fitted. Reference numeral 21 is a support arm that supports the fixed positioning pin 20, and 23 is a movable positioning pin 2
2 is a support arm that supports 2. In this embodiment, the fixed positioning pin 20 and the movable positioning pin 22 are tapered pins having substantially the same shape.

Numerals 24a to 24d are clampers for clamping the four corners of the flat aperture grill 2a, specifically, the immediate vicinity of both ends of the pair of outermost slits, and each of the T-shaped pins 26 is attached to the tip of the clamp arm 25.
And the flat aperture grill 2a is clamped between the hexagon socket set screw 28 attached to the tip end of the clamp arm 27 and the flat aperture grill 2a. And the clamper 24a
The clamper 24b pulls the clamped flat aperture grill 2a outward in the X direction, and the clampers 24c and 24d pull the flat aperture grill 2a in the X and Y directions.

After the flat aperture grill 2a is clamped by the clampers 24a to 24d in this manner, the frame 1 is pushed up from below to lift the flat aperture grill 2a.
Although a is tensioned between the pair of support members 1A and 1A of the frame 1 and before the clamping, as shown by the solid line in FIG. The flat aperture grill 2a includes a central supporting plate 29 and left and right movable supporting plates 30L and 30R.
It is in a state of being supported by. That is, the flat aperture grill 2a from the FAG magazine part is attached to the central support plate 29 and the left and right movable support plates 3 respectively.
It is supported on 0L and 30R. Therefore, the flat aperture grill 2a has the longer supporting flat plates 29, 30.
L, 30R, which is flat as in the case of being supported only by a small supporting flat plate (corresponding to only the central supporting flat plate 29 in FIG. 2) which fits inside the flat aperture grill 2a as in the conventional case. This AG welding machine has no risk that both sides of the aperture grill 2a will be unsupported and bent.

After the support, the positioning pins 20,
22 is a positioning hole 2 of the flat aperture grill 2a
h, 2h, and pulling outward in the Y direction by the positioning pin 22 to perform positioning in the X, Y, and θ directions, and further clampers 24a to 24d to fix the four corners of the flat aperture grill 2a. The frame 1 in a state where it is clamped and then the elastic members 1B and 1B are pressed.
Need to be raised to bring the elastic members 1A, 1A into contact with the flat aperture grille 2a, but in order not to hinder the contact, the movable supporting flat plates 30L on both the left and right sides should be at least before the contacting operation is performed. , 30R
Is moved to the left and right to form a sufficient gap with the central supporting flat plate 29 as shown by the chain double-dashed line in FIG. Therefore, according to the present AG welding machine, the movable supporting flat plates 30L, 30
It is possible to prevent the R from interfering with the welding of the flat aperture grille to the frame 1.

Incidentally, at least the surface of each of the central supporting flat plate 29 and the movable supporting flat plates 30L, 30R is subjected to rust prevention treatment, and the flatness of the surface is, for example, 6.3 s or less. The heights of the clamp positions of the clampers 24a to 24d with respect to the flat aperture grill 2a are the central supporting flat plate 29 and the movable supporting flat plates 30L, 30.
The height of the surface of R is set to be 0 mm to 1.0 mm higher (which means that the height may be the same). Further, according to this AG welding machine, each clamper 24
As a member for directly grasping the flat aperture grille 2a of a to 24d, a T-shaped pin 26 and a hexagon socket set screw 28
Since a low-priced product can be used, the replacement cost is low and the replacement is easy.

3 and 4 show a concrete example of the present AG welding machine. FIG. 3 is one half of the plan view, and the other half of FIG.
FIG. 5 is a side view. 3 to 5, 1 is a frame, 2a is a flat aperture grille, 20 is a positioning pin (taper pin) formed on the positioning arm 21, and 22 is a positioning pin (taper pin) formed on the positioning arm 23. The flat aperture grill 1a is pulled by the cylinder 40 in the X direction to position the flat aperture grill 1a in the X, Y and θ directions.

Clampers 24a to 24d are clampers 2.
4a serves to clamp the upper left corner of the flat aperture grill 2a and pull it to the left in the X direction. Reference numeral 41 is a cylinder for the clamp, and the cylinder 41 functions to clamp or release the flat aperture grill 2a. 42 is a cylinder that pulls the upper left corner of the flat aperture grill 2a. The clamper 24b plays a role of clamping the upper right corner of the flat aperture grill 2a and pulling it to the right, but the configuration is exactly the same as that of the flat aperture grill 2a. Two
4c plays a role of clamping the lower left corner of the flat aperture grille 2a and pulling it diagonally right downward, that is, rightward in the X direction and downward in the Y direction. Specifically, the cylinder 4
Cylinder 43 provides a mechanism for clamping with the force of 1.
The mechanism for pulling downward in the direction of Y and further pulling in the direction of Y is pulled by the cylinder 42 to the left in the direction of X.

Therefore, the pulling force of the combined vector of the two pulling forces in the X and Y directions by the cylinder 42 and the cylinder 43 acts on the flat aperture grill 2a. 24d clamps the lower right corner of the flat aperture grille 2a to the diagonally lower left side, that is, to the left side in the X direction, Y
It acts to pull downward in the direction. Mechanism is clamper 2
It is exactly the same as 4c.

Reference numeral 29 denotes a central supporting flat plate having a size that can be accommodated inside the frame 1 and having a plane roughness of 6.3 s or less, as described above. Reference numerals 30L and 30R denote movable support flat plates provided on the left and right sides of the central support flat plate 29 at the same height so as to be movable in the Y direction. The plane roughness is the same as that of the central support flat plate 29, and the central support flat plate 29 and the movable support plate are movable. When the flat plates 30L and 30R are attached to each other, the overall width in the X direction is the flat aperture grill 2
It is designed to be larger than that of a. 31L,
31R is the movable support plate 30L, 30R is the cylinder 3
It is a flat plate moving device that moves in the X direction by the driving force of 2L and 32R. A support mechanism 33 is configured by the central support flat plate 29, the left and right movable support flat plates 30L and 30R, and the left and right flat plate moving devices.

[0029]

According to the AG welding machine of claim 1, when the flat aperture grill is supported, the left and right movable supporting flat plates are brought close to the central supporting flat plate to support the central supporting flat plate and the left and right movable supporting flat plates. The length can be temporarily made equal to or longer than the flat aperture grille, and the flat aperture grille can be supported in that state. Therefore, there is no possibility that the flat aperture grille will bend when being supported. still,
When pressing the frame against the bottom surface of the flat aperture grill, it is sufficient to move the movable support plates on both the left and right sides and separate them from the center support plate, and avoid that the movable support plates interfere with the welding of the flat aperture grill to the frame. You can

According to the AG welding machine of claim 2, since the main part for directly grasping the flat aperture grill of the clamper is composed of the T-shaped pin and the hexagon socket set screw, it is possible to use a commercially available product and It is easy to procure and replace, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of one embodiment of the present invention.

FIG. 2 is a perspective view showing an outline of a support mechanism which is a main part of the main part of the embodiment.

FIG. 3 is a half part of a plan view showing an AG welding machine that embodies the embodiment.

FIG. 4 is another half of a plan view showing an AG welding machine that embodies the embodiment.

FIG. 5 is a side view showing an AG welding machine that embodies the above embodiment.

FIG. 6 is a perspective view of a color selection electrode.

7 (A) and (B) are for explaining one of the conventional examples of welding of a flat aperture grill.
FIG. 3B is a perspective view showing a welding method, and FIG. 3B is a perspective view showing a strip-shaped body in which a plurality of flat aperture grills are formed in a row.

FIG. 8 is a perspective view showing a new type strip having a plurality of flat aperture grills formed in two rows.

FIG. 9 is a perspective view showing the background art developed and applied by the applicant company.

[Explanation of symbols]

1 frame 2a flat aperture grill 2h positioning hole 20 Positioning pin 22 Positioning pin 24a-d clamper 29 Central support plate 30L Left movable plate 30R Right movable plate 31L Left movement mechanism 31R Right movement mechanism 33 Support mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-12980 (JP, A) JP-A-62-132832 (JP, A) JP-B-46-42856 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) H01J 9/14 H01J 29/07

Claims (2)

(57) [Claims] 1. A flat aperture grill having a large number of slits extending in the vertical direction, through which an electron beam passes, and a horizontal direction by means of a positioning taper pin fitted into a central positioning hole of an upper side and a lower side of the flat aperture grill. With positioning in the vertical direction and the rotational direction and pulling the four corners of the flat aperture grill outward with a clamper, the upper and lower portions of the frame in the vertical direction are placed in the vertical direction of the slit forming portion of the flat aperture grill . An aperture grill welding machine which presses and welds to an upper part and a lower part from its lower side , that is, from the rear side in a direction (front-back direction) perpendicular to both the horizontal and vertical directions, which is welded to the frame. It has a support mechanism that supports the flat aperture grille. A central support flat plate sized to fit in, move the left movable supporting flat plate and the right movable supporting plates movably located laterally at the same height on the left and right of the central support plates the movable support flat plate laterally And a flat plate moving device for bringing the flat plate closer to the side of the central supporting flat plate or separating the flat plate from the central supporting flat plate. 2. A T-shaped pin that head-contacts one surface of the flat aperture grill with each clamper that pulls four corners of the flat aperture grill, and a stopper that contacts the other surface of the flat aperture grill with the tip surface. 2. The aperture according to claim 1, wherein the aperture is a screw.
Char grill welder