JPH0850870A - Explosion-proof band for cathode ray tube - Google Patents

Abstract

PURPOSE:To provide an explosion-proof band for a CRT with no generation of flaws even when mounted on a panel part of the CRT and high explosion- proof performance in the explosion-proof band for the CRT in which a CRT holder is fixed to a band main body by resistance welding. CONSTITUTION:An explosion-proof bind 20 for a CRT has a band main body 21 for winding around the circumference of a panel part 11 of a CRT 10 and a CRT holder 22 for fixing the CRT 10 to a body to be fixed. Projections 31 for fixing the CRT holder 11 to the band main body 11 by projection welding are formed on the band main body 21 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a CRT explosion-proof band of a type in which a CRT holder is attached by resistance welding to a band body mounted on the outer periphery of a panel of a cathode ray tube (CRT).

[0002]

2. Description of the Related Art As shown in FIG. 12, a CRT 10 has a panel portion 11 on which an image is displayed and a funnel portion 12, which are fused with frit glass (solder glass). In order to make the inside of the CRT 10 have a high degree of vacuum, the neck portion 13 of the funnel portion 12 is evacuated. A CRT explosion-proof band 15 is attached to the panel portion 11 in order to prevent the front surface of the panel portion 11 from being deformed during the evacuation and to protect the panel portion 11.

As shown in FIG. 13, the CRT explosion-proof band 15 has a band body 16 wound around the panel portion 11. The band body 16 is formed by bending a steel material into a rectangular shape. Band body 1
Both ends 16a, 16b of 6 are connected to each other via a plate plate 17.

By the way, the CRT 10 is designed to be fixed to a casing, a frame or the like via a CRT holder 18, but in FIGS. 12 and 13, the CRT is shown.
An explosion-proof band 15 of the type in which holders 18 are attached to the four corners of the band body 16 is shown.

The CRT holder 18 and the plate plate 17 are attached to the band body 16 by resistance welding. As is well known, resistance welding is welding in which a current is applied to a portion of a material to be welded, the resistance heat is generated by the current to raise the temperature of the joint, and pressure is applied. This type of resistance welding includes projection welding performed by forming a protrusion (also referred to as a projection) on one of the joints. According to the projection welding, there is an advantage that the electric current can be concentrated on the protrusions to enhance the welding strength and the multi-point simultaneous welding can be performed.

Even in the explosion-proof band 15 for CRT, CR
Since the attachment strength of the T holder 18 and the plate plate 17 is required, the CRT holder 18 and the like are attached to the band body 16 by projection welding.

[0007]

However, in the conventional explosion-proof band 15, since projections for projection welding are formed on the CRT holder 18 side, as shown in FIG. In some cases, a convex portion such as a burr due to the nugget 17 formed by welding may appear toward the inside, that is, the side facing the panel portion 11. Normally, the wall thickness of the band body 16 is about 1 mm, while the wall thickness of the holder 18 is about 2 mm. For this reason,
Because of the nugget 17 formed by welding, it was easy for a convex portion to be formed inside the band body 16 on the thin side. In addition, in ordinary resistance welding, it was common knowledge to form a projection for resistance welding on the thick plate side.

However, due to the formation of burrs and protrusions due to the resistance welding, when the band body 16 is wound around the panel portion 11, the panel portion 11 may be damaged and the explosion-proof property may be deteriorated. . Further, if the outer periphery of the CRT is scratched due to burrs or protrusions of the explosion-proof band 15, it is difficult to reuse the panel portion 11 after the explosion-proof band 15 is attached.

Further, the nugget 17 is used for the band body 1
Since the convex portion is formed inside 6, it is difficult to manage the welding electrode and to extend the life of the welding electrode. The plate plate 17 is also attached to the band body 16 by projection welding, but this portion does not come into pressure contact with the outer periphery of the panel glass, so there is no problem as described above. It is the portion where the CRT holder 18 is attached that the burrs and projections due to projection welding may damage the outer periphery of the panel portion 11.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an explosion-proof band for CRTs which is mounted on the outer periphery of the panel portion of the CRT and has excellent explosion-proof characteristics.

[0011]

In order to achieve the above object, the explosion-proof band for CRT according to the first aspect of the present invention comprises:
The CRT has a band body wound around a panel portion of the CRT and a CRT holder for fixing the CRT to an attached body, and a protrusion for mounting the CRT holder on the band body by resistance welding. The band body is formed so as to project outward.

The size of the protrusion is 5.0 ± 1.0 m in diameter.
It is preferable that m is 0.5 to 1.0 mm. The number of moldings of the protrusion is 2 to 2 per one cathode ray tube holder.
It is preferably four.

It is preferable that the CRT holder has a claw for holding the stacked band bodies.
The explosion-proof band for CRT according to the second aspect of the present invention is CR
A portion of the band body to which the cathode ray tube holder is attached has a band body to be wound around a panel portion of T and a CRT holder for fixing the CRT to an attached body. It bulges outward so that a gap is created with the outer circumference.

The bulging height of the portion of the band body that bulges outward is preferably 0.1 to 0.5 mm.

[0015]

According to the CRT explosion-proof band according to the first aspect in which the projection for resistance welding is formed on the band body side, even if the CRT holder is attached to the band body by resistance welding, the CRT holder is attached to the inside of the band body, that is, the panel portion. There are no burrs or other protrusions facing the opposite side. Therefore, when the band main body is wound around the panel portion, the panel portion is not damaged, and the explosion-proof property is maintained or improved.

In addition, in the portion where the CRT holder is attached, the band body is bulged toward the outside of the CRT.
According to the explosion-proof band for CRTs which concerns on this viewpoint, it has the following effects. In the explosion-proof band for CRT related to this viewpoint, CR
Even if a resistance welding projection is provided on the T holder side and the CRT holder is resistance welded to the band body, the burrs and other protrusions that protrude toward the inside of the band body, that is, the side facing the panel section, swells the band body. It fits in the part where it was put out. Therefore, when the band body is wound around the panel portion, the burr and the convex portion are not pressed against the panel portion, and as a result, the panel portion is not scratched and the explosion-proof property is maintained or improved.

The projection for resistance welding has a diameter of 5.0 ±.
If the height is 1.0 mm and the height is 0.5 to 1.0 mm, and the number of moldings is 2 to 4, a predetermined welding strength can be obtained. In addition, if the CRT holder is formed with claws for holding the stacked band bodies, the manufactured CRT explosion-proof bands can be stacked and stacked, which facilitates storage.

Further, the swelling dimension of the band body is set to 0.
When the thickness is 1 to 0.5 mm, it is possible to reliably accommodate the convex portion such as the burr protruding inside the band body.

[0019]

EXAMPLE An explosion-proof band for a CRT according to the present invention will be described below.
A detailed description will be given based on an embodiment shown in the drawings. 1 is a perspective view showing a CRT explosion-proof band according to an embodiment of the present invention together with a CRT, FIG. 2 is an exploded perspective view showing a CRT explosion-proof band according to the embodiment, and FIG. 3 is a CRT according to the embodiment. FIG. 4 is a perspective view showing a CRT holder in the explosion-proof band, FIG. 4 is an enlarged perspective view showing a main part of the band body of the CRT explosion-proof band according to the embodiment in which protrusions are formed, and FIG. 5 is a CRT explosion-proof band according to the embodiment. FIG. 6 is an enlarged perspective view showing a main part of the band in which the CRT holder is attached to the band body by resistance welding, FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is an explosion-proof band for CRT according to the embodiment. It is a principal part sectional view which shows the state mounted | worn with the panel part of CRT. In addition,
The same members as those shown in FIGS. 12 and 13 are designated by the same reference numerals, and the description thereof will be partially omitted.

As shown in FIG. 1, a CRT explosion-proof band 20 according to an embodiment of the present invention is a panel portion 1 of a CRT 10.
1 has a band main body 21 wound around the circumference of the No. 1 and a CRT holder 22 for fixing the CRT 10 to a casing or a frame (see FIG. 6) as the attached body 23. In the following description, the CRT side of each member constituting the CRT explosion-proof band 20 is referred to as the inside of each member, and the opposite side is referred to as the outside.

The band body 21, as shown in FIG.
It is formed by bending a steel material into a rectangular shape. Both ends 21a and 21b of the band body 21 are formed by the plate plate 2
They are connected to each other via 4. Further, as shown in FIG. 6, the lower end edge of the band main body 21 in the drawing is doubly bent outward in order to increase the strength. The bending portion 25 is processed by a hemming process by a press or a roll former in several steps.

The steel material forming the band body 21 is not particularly limited, but Zn coated steel material, Al plated steel material, Ni plated steel material and the like can be exemplified. When the band body 21 is formed by pressing, for example, a steel material having a wall thickness of about 1.4 to 2.0 mm is used, and the band body 21 having the bent portion 25 is formed by a roll former. When formed, for example, 0.8 to
A steel material having a wall thickness of about 1.2 mm is used.

The plate plate 24, as shown in FIG.
The band body 21 is attached so as to cover both ends 21a and 21b. A part of the plate plate 24 corresponds to the bent portion 25 formed on the band body 21, and slightly protrudes outward. As shown in FIG. 2, the CRT holder 22 is formed by pressing a steel material such as bending and piercing, and is attached to the four corner portions 26 of the band body 21. Each CRT holder 22
As shown in FIG. 3, FIG. 5 and FIG. 6, the base portion 27 has a substantially L-shaped cross section and is attached to the band body 21, and a plate-like member extending outward from the base portion 27. And a flange portion 28. Base 27
Has an R shape corresponding to the R shape of the corner portion 26 of the band body 21. The flange portion 28 is formed with a through hole 29 into which an appropriate fastening means such as a screw or a bolt is inserted. As shown in FIG. 6, the CRT 10 is fixed to the casing 23 by fastening the flange portion 28 to the casing 23 or the like as the mounted body via the fastening means.

The upper end of the base portion 27 in the figure has a claw body 3.
0 is formed. CR manufactured by this claw body 30
The T explosion-proof band 20 can be stacked and stacked, and the band body 21 of the CRT explosion-proof band 20 stacked on the upper side is held by the claw 30. As shown in FIG. 6, the claw body 30 slightly protrudes outward so as to accommodate the bent portion 25 formed in the band body 21.

CRT holder 22 and plate 24
The steel material forming the is not particularly limited, but the same steel material as the band body 21 is used. Further, a steel material having the same thickness as the band body 21 is used. CRT
The holder 22 is attached to the band body 21 by resistance welding, particularly projection welding. When performing projection welding, the CRT holder 22
Alternatively, it is necessary to form a protrusion on one side of the band body 21.

In the conventional resistance welding, the projection was formed on the thick plate, but in this embodiment, as shown in the enlarged view of FIG. 4, the projection for the CRT holder for projection welding is used. 31 are provided at the four corners 26 of the band body 21 which is relatively thin. The protrusion 31 is the band body 21.
Is projected from the inside to the outside and is formed by pressing. The protrusion 31 has a diameter of 5.0 mm in the explosion-proof band 20 for a CRT of 20 to 30 inches.
The height is ± 1.0 mm and the height is 0.5 to 1.0 mm.

The number of protrusions 31 for projection welding one CRT holder 22 is not particularly limited, but it is preferable to form 2 to 4 protrusions 31. When the corner portion 26 of the band body 21 and the base portion 27 of the CRT holder 22 have an R shape as in the illustrated example, if four protrusions 31 are formed, one of them can be welded by applying pressure. The points may not come into contact with the CRT holder 22 and there is a risk of defective bonding. Therefore, in such a case, it is preferable that the number of moldings of the protrusion 31 is three. Also, at this time, one protrusion 31 is
It is preferable that the three protrusions 31 are arranged in a triangular shape so that the other two protrusions 31 are located on the ridgeline of FIG. With such an arrangement, the mounting strength of the CRT holder 22 becomes uniform along the direction orthogonal to the ridgeline and the two directions orthogonal to each surface, a total of three directions.

The plate plate 24 is also attached to the band body 21 by resistance welding, particularly projection welding. The projection 32 for the plate plate for performing projection welding is provided on the inner side surface of the plate plate 24. The protrusion 32 protrudes from the outer side to the inner side of the plate plate 24 and is formed by pressing. This protrusion 32
Is approximately the same as the dimension of the protrusion 31 for the CRT holder. The number of the protrusions 32 formed is not particularly limited, and the protrusions 32 are formed by a predetermined number capable of appropriately connecting both end portions 21a and 21b of the band body 21.

In the explosion-proof band 20 of this embodiment, as shown in FIG. 6, the projection 31 for the CRT holder has the band main body 2
Since it is provided on the first side, even if the CRT holder 22 is attached to the band body 21 by projection welding, a convex portion such as a burr does not protrude toward the inside of the band body 21, that is, the side facing the panel portion 11. Absent. As shown in FIG. 6, a nugget 17 formed by resistance welding
Are formed at the interface between the band body 21 and the CRT holder 22. With this nugget 17, in the conventional case, as shown in FIG.
As shown in, there is a risk that a protrusion may be formed inside the band body 16. In the present embodiment, since the resistance welding projection 31 is formed outward on the band body 21 side, the recess 31a due to the formation of the projection 31 has a recess 31a.
Nugget 1 is formed inside the concave portion 31a.
The convex part by 7 is settled. Therefore, burrs and protrusions do not project from the inner contact surface 21a of the band body 21.

In this embodiment, the welding strength between the CRT holder 22 and the band body 21 was measured and found to be 6
It has been confirmed that there is no problem in terms of strength since it is over 00 kgf. The plate plate 24 is also attached to the band body 21 by projection welding, but this portion is
Since it is not a portion that is pressed against the glass outer periphery of the CRT, there is no problem even if the resistance welding projection is formed on the plate plate 24 side.

In this embodiment, as shown in FIG. 7, when the band main body 21 is wound around the panel portion 11, the panel portion 11 is prevented from being scratched and the explosion-proof property is maintained or improved. it can. Actually, the CR of this embodiment
When the explosion-proof band for T was attached to the panel portion 11 of the CRT, it was confirmed that it was not scratched.

After attaching the explosion-proof band 20,
Since the CRT is not damaged, the CRT 10 can be reused. Furthermore, in the welded portion, no protrusions or burrs are projected on the electrode side in contact with the portion to be welded, so that the management of the welding electrode is facilitated and the life of the welding electrode can be extended.

In the present invention, the projection 3 for the plate plate is used.
2 may be formed on the band body 21 similarly to the protrusion 31 for the CRT holder. If both ends 21a and 21b of the band body 21 are overlapped and joined by resistance welding, it is not necessary to use the plate plate 24. At this time, both end portions 21 of the band body 21 that are overlapped
A projection welding projection is formed on the outer side of a and 21b.

8 to 11 show an explosion-proof band for a CRT according to another embodiment of the present invention, and FIG. 8 shows a C according to the same embodiment.
FIG. 9 is a perspective view showing a CRT holder in the RT explosion-proof band, FIG. 9 is an enlarged perspective view showing a main part of a band body in the CRT explosion-proof band according to the embodiment, and FIG. 10 is a CRT in the CRT explosion-proof band according to the embodiment. FIG. 11 is an enlarged perspective view showing a main part in which the holder is attached to the band body by resistance welding, and FIG. 11 is a sectional view taken along line XI-XI of FIG. 10.

An explosion-proof band for a CRT according to another embodiment of the present invention has a point that a projection for a CRT holder for performing projection welding is provided on the CRT holder, and a shape of a band main body of a portion to which the CRT holder is attached. The modification is different from the explosion-proof band 20 of the above-described embodiment. Below, these modifications will be mainly described.

As shown in FIG. 10, the CRT explosion-proof band 35 includes a band body 36 wound around the panel portion 11 of the CRT 10, and a CRT holder 37 attached to the four corners 26 of the band body 36. Have. Each CRT holder 37 is the CR of the above-mentioned embodiment.
Similar to the T holder 22, as shown in FIGS. 8, 10, and 11, it has a substantially L-shaped cross section, and has a base portion 27, a flange portion 28, and a claw body 30. In this embodiment, as shown in FIG. 8, the projection 38 for the CRT holder for performing projection welding is provided on the CRT holder 37.
It is provided on the base portion 27 of the.

The protrusion 38 projects inward from the outer side of the base portion 27 and is formed by press working.
The dimension of the protrusion 38 is 5.0 ± 1.0 mm in diameter in the explosion-proof band 35 for a CRT having a size of 20 to 30 inches.
The height is 0.5 to 1.0 mm.

The number of projections 38 for projection welding one CRT holder 37 is not particularly limited, but it is preferable to form 2 to 4 projections 38. When the corner portion 26 of the band main body 36 and the base portion 27 of the CRT holder 37 have an R shape as in the illustrated example, it is preferable that the number of the protrusions 38 is three, as described above. At this time, as described above, it is preferable to arrange the three protrusions 38 in a triangular shape.

On the other hand, as shown in the enlarged view of FIG. 9, the band body 36 has a portion to which the CRT holder 37 is attached, that is, four corner portions 26, which bulge outward and have a dent 39 formed inside. There is. With this dent 39,
When the band body 31 is attached to the panel portion 11, a predetermined gap is formed between the panel portion 11 and the band body 36. The bulging size of the band body 31, that is, the size of the gap is preferably about 0.1 to 0.5 mm.

In the explosion-proof band 35 of this embodiment having the above structure, the projection 38 for performing projection welding is used.
Although it is provided on the CRT holder 37 side, since the dent 39 is formed inside the band main body 36, even if the CRT holder 37 is attached to the band main body 36 by projection welding, it faces toward the inner side of the band main body 36. The protruding portion such as a burr that has come out is housed in the dent 39.

Therefore, as in the above-described embodiment, when the band main body 36 is wound around the panel portion 11, the panel portion 11 is not scratched and the explosion-proof property can be maintained or improved. In addition, the panel unit 11
It has become possible to reuse. Further, the management of the welding electrode is facilitated, and the service life of the welding electrode can be extended.

CR for the band bodies 21 and 36
The attachment positions of the T holders 22 and 37 are not limited to the four corner portions 26 of the band bodies 21 and 36 shown in the figure, but may be a portion other than the corner portions 26. Also, CRT
The shape and the number of holders 22 and 37 are not limited to the shape and the number of illustrated examples, and can be appropriately modified according to the mounting position with respect to the band bodies 21 and 36, the relative positional relationship with the mounted body, and the like. is there.

[0043]

As described above, the CR according to the present invention
According to the explosion-proof band for T, since the projection for resistance welding is formed on the band body side, even if the CRT holder is attached to the band body by resistance welding, burrs and the like are directed toward the inside of the band body, that is, the side facing the panel portion. There is no protrusion. Therefore, when the band main body is wound around the panel portion, the panel portion of the CRT is not scratched, and the explosion-proof property can be maintained or improved. Also, the panel part can be reused. Further, the management of the welding electrode is facilitated, and the service life of the welding electrode can be extended.

Further, according to the explosion-proof band for CRT according to another aspect of the present invention, since the band body is projected toward the outside of the CRT at the portion to which the CRT holder is attached, the resistance welding for the CRT is formed. Even if the CRT holder is attached to the band body by resistance welding using protrusions,
The protrusions such as burrs that protrude toward the inside of the band body, that is, the side facing the panel section, are accommodated in the protruding portion of the band body. Therefore, when the band main body is wound around the panel portion, the panel portion of the CRT is not scratched, and the explosion-proof property can be maintained or improved.
Also, the panel part can be reused. Further, the management of the welding electrode is facilitated, and the service life of the welding electrode can be extended.

Further, since the nail body for holding the stacked band bodies is formed on the CRT holder, the manufactured CR
Explosion-proof bands for T can be piled up and piled up for easy storage.

[Brief description of drawings]

FIG. 1 is a perspective view showing an explosion-proof band for a CRT according to an embodiment of the present invention together with a CRT.

FIG. 2 is an exploded perspective view showing a CRT explosion-proof band according to the embodiment.

FIG. 3 is a perspective view showing a CRT holder in a CRT explosion-proof band according to the embodiment.

FIG. 4 is an enlarged perspective view showing a main part of the explosion-proof band for CRT according to the embodiment, in which a protrusion of the band body is formed.

FIG. 5 is an enlarged perspective view showing a main part of a CRT explosion-proof band according to the embodiment, in which a CRT holder is attached to a band body by resistance welding.

6 is a sectional view taken along line VI-VI in FIG.

[Fig. 7] Fig. 7 shows a CRT explosion-proof band according to the embodiment.
It is a principal part sectional view which shows the state mounted | worn with the panel part of RT.

FIG. 8 is a perspective view showing a CRT holder in an explosion-proof band for CRT according to another embodiment of the present invention.

FIG. 9 is an enlarged perspective view showing a main part of the band body of the explosion-proof band for CRT according to the embodiment.

FIG. 10 is an enlarged perspective view showing a main part of the CRT explosion-proof band according to the embodiment, in which the CRT holder is attached to the band body by resistance welding.

11 is a sectional view taken along line XI-XI of FIG.

FIG. 12 is a perspective view showing a CRT having a conventional CRT explosion-proof band mounted on a panel portion.

FIG. 13 is an exploded perspective view showing a conventional CRT explosion-proof band.

[Explanation of symbols]

 10 ... CRT (cathode ray tube) 11 ... Panel part 20, 35 ... Explosion-proof band for CRT 21, 36 ... Band body 22, 37 ... CRT holder 23 ... Attached body 30 ... Claw body 31, 38 ... Protrusion for resistance welding 39 … Dent

Claims (6)

[Claims] 1. A cathode ray tube holder having a band body wound around a panel portion of the cathode ray tube and a cathode ray tube holder for fixing the cathode ray tube to a body to be attached, the cathode ray tube holder with respect to the band body. Explosion-proof band for a cathode ray tube, wherein a projection for attaching by means of resistance welding is formed on the band body side so as to project outward. 2. The dimension of the protrusion is 5.0 ± 1.0 in diameter.
The explosion-proof band for a cathode ray tube according to claim 1, which has a height of 0.5 mm and a height of 0.5 to 1.0 mm. 3. The explosion-proof band for a cathode ray tube according to claim 1, wherein the number of the protrusions formed is 2 to 4 per one cathode ray tube holder. 4. The explosion-proof band for a cathode ray tube according to claim 1, wherein the cathode ray tube holder has a claw body that holds the stacked band bodies. 5. A band body having a band body wound around a panel portion of the cathode ray tube, and a cathode ray tube holder for fixing the cathode ray tube to an attached body, wherein the cathode body is attached to the band body. Explosion-proof band for a cathode ray tube, wherein a portion of the above portion bulges outward so that a gap is formed between the portion and the outer circumference of the cathode ray tube. 6. The explosion-proof band for a cathode ray tube according to claim 5, wherein the bulging height of the portion of the band body that bulges outward is 0.1 to 0.5 mm.