JPH05182602A - Method for mounting explosion-proof type cathode-ray tube and explosion-proof type cathode-ray tube used trherewith - Google Patents

Abstract

PURPOSE:To facilitate the work process of mounting a cathode-ray tube, by making the structure so as to prevent displacement between the hole of a mounting lug and the hole of a mounting frame for the cathode-ray tube which is caused by shrinkage of a shrink band. CONSTITUTION:After a funnel 2 and a panel 3 are firmly fixed to a cathode-ray tube, a shrink band 4 welded at the superimposed part to be formed into a rectangular-shape is heated to be expanded and fitted the to circumference of the cathode-ray tube and then fastened. Mounting lugs 8 are welded at four corners of the band 4 before shrinkage fitting. The power of preventing implosion is obtained from shrinkage of the band 4. Even when a lug 8 is displaced due to shrinkage of the band 4, the central axis of a hole 8a is not deviated from that of a mounting screw hole 7a, so that the operation of mounting a cathode-ray tube on the mounting frame is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof type cathode ray tube used for TVs and the like.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a conventional explosion-proof type cathode ray tube disclosed in, for example, Japanese Utility Model Laid-Open No. 2-73043, in which 1 is a cathode ray tube, 2 is a funnel, 3 is a panel, and 4 is a cathode ray tube 1. Shrink band 5 wound around, 5 is mounting lug welded to shrink band 4, 6
Is a holding holder attached to the shrink band 4.

The explosion-proof type cathode-ray tube is fastened with a force necessary for preventing implosion by fixing the funnel 2 and the panel 3 and heating the shrink band 4 on its outer periphery to expand it and then fitting it (shrink fit). ing. As described above, the L-shaped attachment lugs 5 having the holes 5a for attaching the explosion-proof cathode ray tube 1 to the attachment frame 7 shown in FIG. 9 are welded to the four corners of the shrink band 4.

[0004]

In the conventional explosion-proof type cathode-ray tube, as shown in FIG. 9, the shrink band 4 shrinks in the direction of the solid line arrow in the figure during cooling immediately after shrink fitting, so that the mounting lug 5 also has the broken line arrow. Displace in the direction. At this time, the positions of the holes 5a of the mounting lug 5 and the screw holes 7a of the mounting frame 7 may be displaced from each other by a distance L due to variations in manufacturing conditions and dimensional conditions of the constituent materials, which makes it difficult to mount the explosion-proof cathode ray tube 1. There was a problem such as.

The present invention has been made to solve the above-mentioned problems, and is used for a method of attaching an explosion-proof type cathode ray tube and a method thereof, which can facilitate the work process when attaching the explosion-proof type cathode ray tube. The purpose is to obtain an explosion-proof cathode ray tube.

[0006]

In the explosion-proof type cathode-ray tube according to the present invention, when the mounting lug is welded to the shrink band, the mounting lug is welded so that its hole faces the longitudinal direction of the shrink band. ..

[0007]

According to the present invention, since the displacement of the hole of the mounting lug and the screw hole of the mounting frame of the explosion-proof type Braun tube does not occur due to shrinkage of the shrink band, the work process at the time of mounting the explosion-proof type Braun tube is easy. Becomes

[0008]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view, and the same or corresponding parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. In the figure, 8 is a mounting lug welded to the shrink band 4, which has a hole 8a oriented in the circumferential direction. Reference numeral 9 is a superposed portion of the welded portion when the shrink band 4 is framed. The explosion-proof type cathode-ray tube is formed by fixing the funnel 2 and the panel 3 and then heating and expanding the shrink band 4 welded to the outer periphery of the funnel 2 and formed in a rectangular shape by shrinking to fit (shrink fit). , It is fastened to the state shown in Fig. 1 with the force necessary to prevent the implosion of the cathode ray tube.

Mounting lugs 8 are welded to the four corners of the shrink band 4 before shrink fitting. As shown in FIG. 2, the force for preventing the implosion of the cathode ray tube is obtained by the shrinking of the shrink band 4 (shrinking in the direction of the solid line arrow in the figure). Is different. However, according to the present invention, even if the position of the mounting lug 8 varies due to contraction, the central axis AB (see FIG. 3) between the hole 8a and the mounting screw hole 7a does not deviate, so the explosion-proof type cathode ray tube. Can be easily attached to the attachment frame 7. As shown in FIGS. 2 and 3, the hole 8a
By mounting the washer 10 between the mounting screw hole 7a and the mounting screw hole 7a, more accurate positioning can be performed.

Embodiment 2. Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 4, the same or corresponding parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, as the mounting lug 8A, the overlapping portion 9 and the bent portion of the overlap welding portion of the shrink band 4 are used. The operation and the operation are the same as those of the first embodiment. In this embodiment, it is not necessary to manufacture the mounting lug 8A as a separate component, so the number of components is reduced and the cost is reduced.

Embodiment 3. Further, as shown in FIG. 5, the mounting lug 8B may be formed by cutting out a part of the shrink band 4 and bending it.

Embodiment 4. Further, as shown in FIG. 6, the mounting lugs 8, 8A, 8B of the first, second, and third embodiments may be arbitrarily combined.

Embodiment 5. Further, as shown in FIG. 7, a T-shaped key portion 8b may be provided on the heads of the mounting lugs 8, 8A, 8B of the first, second, and third embodiments. Since the hook portion 8b is fitted into the groove provided in the mounting frame 7, a catching action is generated, so that it is possible to generate a temporary fastening action when fixing the explosion-proof type cathode-ray tube. Will be easier.

[0014]

As described above, according to the present invention, since the direction of the hole of the mounting lug is fixed so as to face the circumferential direction of the shrink band, it is possible to easily mount the explosion-proof type cathode-ray tube on the mounting frame. Is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an explosion-proof type cathode-ray tube according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing a method of mounting the explosion-proof type cathode ray tube of FIG.

FIG. 3 is an exploded view of a main part of FIG.

FIG. 4 is a perspective view showing an explosion-proof type cathode-ray tube according to Example 2 of the present invention.

FIG. 5 is a perspective view showing a mounting lug according to Embodiment 3 of the present invention.

FIG. 6 is a side view showing a shrink band having a mounting lug according to Embodiment 4 of the present invention.

FIG. 7 is a side view showing a mounting lug according to a fifth embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional explosion-proof type cathode ray tube.

9 is a diagram showing a method of mounting the explosion-proof type cathode ray tube in FIG.

[Explanation of symbols]

 2 Funnel 3 Panel 4 Shrink band 7 Mounting frame 7a Mounting screw hole 8 Mounting lug 8A Mounting lug 8B Mounting lug 8a Hole 9 Overlap part

Claims (2)

[Claims] 1. An explosion-proof cathode-ray tube having a shrink band wound around the outer periphery of a panel and a mounting lug provided on the shrink band so that the holes of the mounting lug are oriented in the circumferential direction of the shrink band. The explosion-proof cathode ray tube is attached to the attachment frame by inserting a screw into the attachment hole and the hole of the attachment lug so that the attachment hole provided in the explosion-proof cathode ray tube attachment frame faces the hole of the attachment lug. How to install an explosion-proof type cathode ray tube. 2. An explosion-proof type cathode-ray tube having a shrink band wound around the outer periphery of the panel and a mounting lug provided on the shrink band, so that the holes of the mounting lug are oriented in the circumferential direction of the shrink band. Explosion-proof type cathode ray tube characterized by having done.