JP3183194B2 - Flat aperture grille, aperture grille and periphery trimming method thereof, and cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for selecting colors.
Aperture grille, flat aperture used for this
Equipped with an aperture grill and such an aperture grill
The cathode ray tube obtained. The present invention relates to a method for trimming a periphery of an aperture grill, and more particularly, to a method of trimming a perimeter of an aperture grille that peels a periphery of a flat aperture grill welded to a frame from a slit region.

[0002]

2. Description of the Related Art An aperture grill used as a color selecting means in a color tube of the Trinitron (trade name) system is welded to a frame. In order to perform the welding smoothly, a peripheral member is provided around a slit region of the aperture grill. Welding is performed in the attached state (this is called a flat aperture grill).

That is, as shown in FIG. 5, a frame 10 is welded to the back surface of the flat aperture grill 2, and the peripheral 14 of the flat aperture grill 2 needs to be removed after welding to the frame 10. The removal is called periphery trimming. More specifically, the flat aperture grill 2 includes a rectangular slit region 4 in which a number of slits are formed in parallel, a peripheral 14 continuously provided outside four sides of the slit region 4, and a slit region 4. Between the two sides of the slit region 4 in the X direction perpendicular to the slit extending direction and the peripheral 14, and the trimming slit 6 formed in parallel with the Y direction that is the slit extending direction, the slit region. A half-etching line extending between the two sides of the slit region in the Y direction, which is the direction in which the slit extends, and the peripheral; ing. The half etching line 8 is formed by reducing the thickness of the flat aperture grill 2, and the inside of the half etching line 8 is
Welded to. In FIG. 5, reference numeral 30 denotes a center reference hole, and the center reference hole 30 is used for positioning both when the frame 10 is assembled to the flat aperture grill 2, and is located outside the half etching line 8. It is provided above. Conventionally, as shown in FIG. 6, the peripheral 14 is separated from the half-etched portion 8 by being clamped by the clamp mechanism 16 of the trimming device and driven in the direction of the arrow 18 (actually open flat 7-240144). Reference).

[0004]

By the way, as shown in FIG. 6, the frame 10 has a curvature, and the flat aperture grill 2 also has a curvature along the frame 10, so that the flat aperture grill 2 is broken. Passes through the center and ends, the half-etched portion 8 is apt to be left unbroken due to variations in the depth or the like. As a countermeasure, the operation of the clamp mechanism 16 is controlled by turning upward as shown by an arrow 20 in FIG. However, such means has a problem that the movement of the clamp mechanism 16 is complicated, a complicated drive mechanism is required, and metal burrs generated at the end of peripheral removal cannot be completely eliminated. . The present invention has been made in view of the above points,
An object of the present invention is to provide a method of trimming an aperture grille that can reliably remove a peripheral by a simple movement of a clamp mechanism. In addition, the present invention provides
Flat aperture chuck suitable for ferri trimming method
The aim is to provide a lil. Further, the present invention provides
High quality aperture grill and this aperture grill
It is an object to provide a cathode ray tube having a rill.

[0005]

In order to achieve the above-mentioned object, an aperture grill periphery according to the present invention is provided.
The slitting method includes a rectangular slit region in which a number of slits are formed in parallel, a peripheral connected to each of the four sides of the slit region, and an X direction orthogonal to the slit extending direction of the slit region. A trimming slit formed between the two sides on both sides of the slit region and the periphery in parallel with the Y direction, which is the slit extending direction, and a trimming slit in the Y direction, which is the slit extending direction of the slit region. The two sides of the inside portion of the half etching line of the flat aperture grill having a half etching line extending in the X direction orthogonal to the slit extending direction between the two sides on both sides and the peripheral direction are welded to the frame. Then, separate the flat aperture grille peripheries welded to the frame along the half etching line At this time, a center reference hole is formed at the center of the half etching line in the X direction so as to intersect the half etching line, and both ends of the flat aperture grill in the X direction are clamped by a pair of clamp mechanisms. Are moved in a direction approaching each other at a constant speed to separate the peripheral along the half etching line.

In the present invention, the half-etching line is made to cross the center reference hole of the aperture grille, and both sides of the peripheral in the X direction are clamped by a pair of clamp mechanisms, and are moved in a direction approaching each other at a constant speed. Peel the peripheries from the line. This allows
Even if there is variation in the depth of the half-etching line, no peeling residue occurs, and the peripheral can be reliably removed to the end. In addition, since the center reference hole is the final end of the peripheral peeling, the peripheral can be completely removed without leaving metal burrs which are likely to be generated at the final end of the peeling.
A T picture tube is obtained. Further, by forming the half etching line and the center reference hole to intersect, the position of the center reference hole can be formed closer to the inside in the Y direction,
Therefore, the size of the flat aperture grill can be reduced, and the cost can be reduced by reducing the material.

[0007] The flat aperture grille according to the present invention.
Is a rectangular slit with many slits formed in parallel.
And a peripheral area connected to the outside of the four sides of the slit area.
Perpendicular to the ferrite and the slit extension direction of the slit area
Slip between the two sides on both sides in the X direction and the peripheral
A trimming slit extending parallel to the
2 on both sides in the Y direction which is the slit extension direction of the lit area
Between the side and the peripheral, orthogonal to the slit extending direction
Etching line extending in the X direction
And the peripheries on both sides along the half-etch line
It has a center reference hole as the center when peeling off from
The reference hole crosses the half-etched line.
It is characterized by being formed as follows.

[0008] In the flat aperture grill of the present invention
Is located between one side of the slit area and the peripheral.
A trimming slit parallel to the lit is formed,
Slit between the other side of the lit area and the peripheral
Half-etching line is formed in the direction perpendicular to
At the same time, the half etching line crosses the center reference hole
With this configuration, the half etching line
Along the periphery, the peripheries were peeled from both sides toward the center
At this time, the center reference hole is the final end of the peripheral peeling ,
Completely leaving metal burrs that easily occur at the end of peeling
Periphery removal becomes possible. Further, since the half etching line and the center reference hole intersect, the position of the center reference hole can be formed closer to the inside in the Y direction,
The size of the flat aperture grille can be reduced, and costs can be reduced by reducing the number of materials.

An aperture grill according to the present invention has a rectangular slit region in which a number of slits are formed in parallel, a peripheral connected outside four sides of the slit region, and a slit extending direction of the slit region. A trimming slit extending in parallel with the slit between the two sides on both sides in the X direction orthogonal to the periphery and the two sides on both sides in the Y direction, which is the slit extending direction of the slit region, and the periphery. X perpendicular to the slit extending direction
A half-etching line extending in the direction, and a center reference hole serving as a center when the peripheral is peeled off from both sides along the half-etching line, so that the center reference hole intersects with the half-etching line. The flat aperture grill formed in the above is welded to the frame, the peripheral is removed from the half-etched line , and the mark of the center reference hole is left .

In the aperture grill of the present invention, since the flat aperture grill is used, metal burrs do not remain in the peripheral peeled portion, and the quality of the aperture grill is improved.

A cathode ray tube according to the present invention has a rectangular slit region in which a number of slits are formed in parallel, a peripheral connected outside four sides of the slit region, and a slit extending direction of the slit region. A trimming slit extending in parallel with the slit between the two sides on both sides in the X direction orthogonal to the periphery and the two sides on both sides in the Y direction, which is the slit extending direction of the slit region, and the periphery. A half-etching line formed to extend in the X direction orthogonal to the slit extending direction, and a center reference hole serving as a center when peeling the peripheral from both sides along the half-etching line, A flat aperture grill with a center reference hole formed so as to intersect with the half-etched line is welded to the frame, and the peripheries are half-etched. It is removed from Gurain, center reference
It is characterized in that it comprises an aperture grill in which holes are left .

In the cathode ray tube of the present invention, a high quality aperture
High quality cathode ray tube with char grille
Can be achieved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a front view of a flat aperture grill used in the method of the present invention, FIG. 2 is a front view showing details of a portion A in FIG. 1, FIG. 3 is a front view corresponding to FIG. It is a top view which shows the peripheral removal operation | movement of the method of this invention. 1, a rectangular slit region 4 is formed in the flat aperture grill 2 similarly to the conventional flat aperture grill 2 shown in FIG. Trimming slits 6, 6 are formed on both sides (X direction) of the slit region 4, and half etching lines 8, 8 in which the thickness of the flat aperture grill 2 is reduced above and below (Y direction) of the slit region 4.
Are formed. On the back side of the flat aperture grill 2, 2
The sides are welded to the frame 10 (see FIGS. 2 and 4), and the flat aperture grill 2
Center reference holes 12 are formed above and below 1 (a straight line extending in the Y direction through the center of the slit region 4 in the X direction). The center reference holes 12, 12 are used for positioning the two when the frame 10 is assembled to the flat aperture grill 2, as shown in FIG.
The inner end 1201 side (slit area 4 side of the aperture grill 2) is wide, and the opposite side is narrow. In the embodiment of the present invention, the half etching line 8 intersects with the center reference hole 12, whereby the half etching line 8 is interrupted at the center reference hole 12 (FIG. 2). reference).

After assembling to the frame 10, the aperture grill 2 is set on a trimming device (not shown) and trimming of the peripheral 14 is performed as follows. In FIG. 4, reference numeral 20 denotes a clamp mechanism of the trimming device, which is a well-known structure that clamps both ends of the peripheral 14 by an air cylinder 24 or the like, and is provided at both ends of the aperture grill 2 in the X direction. Each clamp mechanism 20 is an arm mechanism (not shown) of a trimming device.
And clamps both ends of the peripheral 14 and moves on an arc-shaped trajectory at a constant left and right speed as shown by an arrow 26 in FIG. That is, both ends of the peripheral 14 are moved closer to each other, and are moved at a constant speed in a direction away from the surface of the aperture grill 2 forming the slit region 4. As a result, the peripherals 14 are connected to the trimming slits 6.
From the half-etching line 8 one after another, and the final end of the peeling is located at the center reference hole 12.
Is reached, the peripheral 14 is completely separated from the aperture grille 2, and the trimming is completed in a state where the hole 12 a of the center reference hole 12 is slightly left as shown in FIG. In this case, since the half etching line 8 intersects the center reference hole 12 of the aperture grill 2, if the two clamp mechanisms 16, 16 are synchronized, the center reference hole 12 becomes the final end of the peripheral peeling, and Periphery 14 can be completely removed without leaving burrs.

If the half etching line 8 and the center reference hole 12 do not intersect, if the clamping mechanism 20
Even when the clamps 20 are synchronized, since the clamp mechanism 20 is broken while being pulled upward, the clamp mechanism 20 is broken at the last peeled portion, and metal burrs such as a turn-up remain, thereby causing a problem in a later process. Therefore, it is necessary to cross the center reference hole 12 and the half etching line 8 and to perform the trimming operation at a constant speed by synchronizing the pair of clamp mechanisms 16 and 16.

As shown in FIG. 2, the relationship between the center reference hole 12 and the intersection of the half etching line 8 is such that the dimension t from the inner end 1201 of the center reference hole 12 to the half etching line 8 is 0 mm or more. It is preferably 1 mm or less. This is because, in the case of a 20-inch CRT picture tube, the welding space L for securing the welding portion 28 for welding the frame 10 is 4 mm, and the dimension t is 1 mm.
In this case, the welding space L is 4-1 = 3 mm, and when the dimension t is 1 mm or more, the welding space L becomes too small.

[0017] In this way, the gold is removed
Peripherily removed quality without leaving genus burrs
A good aperture grill is constructed. And this
A cathode ray tube is formed using the aperture grill.

As described above, in the trimming method according to the present embodiment, the half etching line 8 intersects the center reference hole 12 of the aperture grill 2 and the pair of clamp mechanisms 16, 16 approach each other at a constant speed. Therefore, even if there is variation in the depth of the half etching line 8, no peeling remains, and the peripheral can be reliably removed to the end. Further, since the center reference hole 12 is the final end of the peeling of the peripheral, the peripheral 14 can be completely removed without leaving metal burrs that easily occur at the final end of the peeling. Further, by forming the half etching line 8 and the center reference hole 12 to cross each other, the position of the center reference hole 12 can be formed closer to the inside in the Y direction, and the two positions shown in FIG. The size of the flat aperture grill 2 can be further reduced as compared with the conventional structure of
The cost can be reduced by reducing the amount of material.

[0019] Flat aperture grid of the present embodiment
When peeling the peripheral, the peripheral
The re-trimming method can be applied to the peripheral
Perfect Enables peeling.

[0020] In the aperture grill of the present embodiment,
Using the above flat aperture grille, quality
A good aperture grill can be provided. Of this embodiment
For the cathode ray tube, the above-mentioned aperture grille will be provided.
Thus, a higher quality cathode ray tube can be provided.

[0021]

As described above in detail, according to the present invention, the half etching line crosses the center reference hole of the aperture grill, and the pair of clamp mechanisms are moved at a constant speed in the direction approaching each other. Therefore, even if there is a variation in the depth of the half etching line, no peeling remains, and the peripheral can be reliably removed to the end. In addition, since the center reference hole is the final end of the peripheral peeling, the peripheral can be completely removed without leaving metal burrs that are likely to occur at the final peeling end, and a high- quality aperture grill can be obtained.
There is no problem in the subsequent steps, and a high quality CRT picture tube can be obtained. Further, by forming the half etching line and the center reference hole so as to intersect with each other, the position of the center reference hole can be formed closer to the inside in the Y direction. Therefore, the dimensions of the flat aperture grill can be reduced, and the material can be reduced. Cost reduction becomes possible.

[Brief description of the drawings]

FIG. 1 is a front view of a flat aperture grill used in the method of the present invention.

FIG. 2 is a front view showing details of a portion A in FIG. 1;

FIG. 3 is a front view corresponding to FIG. 2 after peripheral removal.

FIG. 4 is a plan view showing a peripheral removal operation of the method of the present invention.

FIG. 5 is a perspective view showing a conventional flat aperture grill.

FIG. 6 is a plan view showing a conventional peripheral removal operation.

[Explanation of symbols]

2 Flat aperture grille, 4 slit area, 8 half etching line, 10 frame, 12 center reference hole, 1201 inner end of center reference hole, 20 clamp mechanism

Claims (7)

(57) [Claims] 1. A rectangular slit region in which a number of slits are formed in parallel, a peripheral connected to each of four sides of the slit region, and an X direction orthogonal to a slit extending direction of the slit region. A trimming slit formed between two sides on both sides of the slit region and the periphery in parallel with the Y direction as the slit extending direction, and a slit region in the Y direction as the slit extending direction of the slit region. The two sides of the inside portion of the half etching line of the flat aperture grill having a half etching line extending in the X direction orthogonal to the slit extending direction between the two sides on both sides of the peripheral and the periphery Weld, then separate the flat aperture grille peripheries welded to the frame along the half-etch line A center reference hole is formed at the center of the half etching line in the X direction so as to intersect the half etching line, and both ends of the flat aperture grill in the X direction are clamped by a pair of clamp mechanisms; Are moved in a direction approaching each other at a constant speed so as to separate the peripheries along the half-etching line. 2. The two clamping mechanisms approach each other,
The periphery trimming method for an aperture grill according to claim 1, wherein the aperture grill is moved in a direction away from a surface of the aperture grill forming a slit region. 3. The half-etching line according to claim 1, wherein the half-etching line is formed on a line near the slit region of the center reference hole and within 1 mm from the inner end of the center reference hole. Periphery trimming method for aperture grill. 4. A rectangular shape in which a number of slits are formed in parallel.
Shaped slit region and a peripheral connected to the outside of four sides of the slit region
And the X direction orthogonal to the slit extending direction of the slit area
Between the two sides on both sides of the
And a trimming slit extending in parallel with the Y direction, which is a slit extending direction of the slit area.
Extending between the two sides of the side and the peripheral
Half-etchin extending in the X direction perpendicular to the X direction
And Gurain both sides along the periphery to half etching line
And a center reference hole serving as a center when the center aperture is peeled off from the half-etched line. 5. The flat aperture grill according to claim 4, wherein a position of the center reference hole from the inside of the center reference hole to a half etching line is 0 mm or more and 1 mm or less. 6. A rectangular slit region in which a number of slits are formed in parallel, a peripheral connected outside four sides of the slit region, and an X direction orthogonal to a slit extending direction of the slit region. A trimming slit extending in parallel with the slit between two sides on both sides of the peripheral and the peripheral; and two sides on both sides in the Y direction, which is a slit extending direction of the slit region, and the peripheral. A half-etching line formed extending in the X direction perpendicular to the slit extending direction, and a center reference hole serving as a center when peeling the peripheral from both sides along the half-etching line, A flat aperture grill formed so that the center reference hole intersects with the half-etched line is welded to a frame, and the peripheral It is removed from the half-etched lines, aperture grille, characterized by comprising left the hole mark of the center reference hole. 7. A rectangular slit region in which a number of slits are formed in parallel, a peripheral connected outside four sides of the slit region, and an X direction orthogonal to a slit extending direction of the slit region. A trimming slit extending in parallel with the slit between two sides on both sides of the peripheral and the peripheral; and two sides on both sides in the Y direction, which is a slit extending direction of the slit region, and the peripheral. A half-etching line formed extending in the X direction perpendicular to the slit extending direction, and a center reference hole serving as a center when peeling the peripheral from both sides along the half-etching line, A flat aperture grill formed so that the center reference hole intersects with the half-etched line is welded to a frame, and the peripheral Half-etching lines are removed from the cathode ray tube, characterized in that it comprises an the center reference Apachi <br/> Yaguriru the hole mark is left in the hole.