JPH01239727A - Manufacturing equipment for implosion proof cathode-ray tube - Google Patents

Abstract

PURPOSE:To make it possible to insert a cathode-ray tube in a reinforcing metal fixture smoothly and to improve the accuracy of the positioning of attaching lugs and the Z-dimension by providing a means for applying outward more expansion force than the thermal expansion of the reinforcing metallic fixture when heated with a gas burner. CONSTITUTION:A reinforcing metallic fixture 15 is heated and thermally expanded with a burner 9. At this time, the operating rod of an air cylinder 25 is pulled back and the operating rod of an air cylinder 29 is pushed out. Thereby a slide base 20 is operated to the outside direction through an angle plate 26, and attaching lug 16 is pulled out with a force more than the thermal expansion of the reinforcing metallic fixture 15 through a pin 21a of the lug backing plate 21 to place the lug 16 in a specified position. And the reinforcing plate holder 28 is operated to the outside direction, and the central portion of the reinforcing metallic fixture 15 is pulled outward with an expanding force larger than the thermal expansion of the fixture 15, so as to place the central portion of the metallic fixture 15 in a specified position. Therefore the cathode-ray tube can be easily inserted in the metallic fixture 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing an explosion-proof cathode ray tube, in which a reinforcing metal fitting is attached to a cathode ray tube by shrink fitting in the manufacturing process of the cathode ray tube.

[Conventional technology]

There are various methods of reinforcing explosion-proof cathode ray tubes, but one of them is to heat and expand an endless reinforcing metal fitting using a gas burner, insert it into the outer periphery of the face of the cathode ray tube, and let it cool and contract. There is something that is fixed by shrink fitting.

In the conventional shrink-fit reinforcing device, the reinforcing metal fittings are pre-welded, and the reinforcing metal fittings are heated while the four places on the lug are received by lug holders. No. 182637/1983 is mentioned.

[Problem to be solved by the invention]

In the above conventional technology, the mounting hole on the lug and the amount of expansion of the reinforcing metal fitting are determined by thermal expansion only. The shape changes in the free state, and the shape changes indefinitely due to the effects of processing distortion, thermal distortion, etc. of the reinforcing metal fittings. That is, when the reinforcing metal fittings are heated,
Due to the difference in thermal expansion between the inner and outer surfaces of the reinforcing metal fittings on the long and short sides.

Warpage and sagging toward the gas burner side (inside) occur, making it impossible to smoothly insert the cathode ray tube into the reinforcing metal fitting. In addition, in the diagonal axis direction of the reinforcing metal fittings for the lugs, all four lugs will stretch and misalignment will occur. Dimensional accuracy decreases.

The object of the present invention is to make the reinforcing metal fittings for the cathode ray tube smooth.
The object of the present invention is to provide a manufacturing equipment for an explosion-proof cathode ray tube, which can be inserted into an explosion-proof cathode ray tube, and which can improve lug position accuracy and Z dimension accuracy during installation.

[Means to solve the problem]

The above object is achieved by providing an expansion means that applies an expansion force in the outward direction that is greater than the thermal expansion coefficient of the reinforcing metal fitting when heated by a gas burner.

[For use]

By applying an outward expansion force to the reinforcing metal fittings by the expansion means f during heating with the gas burner, the reinforcing metal fittings can thermally expand smoothly up to a predetermined position, and deformation of the reinforcing metal fittings is regulated. That is, when an expanding force is applied to the long and short sides in the outer diameter direction, the shapes and dimensions of the long and short sides are stabilized, and when an expanding force is applied to the mounting lugs in the outer radial direction, the positional accuracy of the mounting lugs is stabilized.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. As shown in FIG. 1, on the cathode ray tube mounting table 2 on which the cathode ray tube 1 is placed, a suction rubber 3 for vacuum suctioning the cathode ray tube 1 and a cathode ray tube holder 4 are provided. The cathode ray tube mounting table 2 is fixed to the upper end of a center shaft 6 rotatably supported by a lifting table 51. The lifting platform 5 is provided so as to be able to move up and down along a vertically arranged guide shaft 71, and is moved up and down by the up and down cylinder 8#. Also, the gas burner 9 is located above the lifting platform 5.
is provided. The center shaft 6 rotates as the rotation of the motor 10 is transmitted through the rotation shaft 11 and gears 12 and 13.

The fixing part 14 of the device is provided with a lug receiver means 17 for receiving a lug 16 and a lug expansion means 18, and a reinforcing metal fitting expansion means 19 is provided on the cass burner 91. .

As shown in FIGS. 2 and 3, the lug receiver means 17 is provided with four attachments corresponding to the lugs 16, respectively, and has the following configuration. Fixed part 1
41 The slide base 20 can freely slide in the center direction 1
A lug seat 21 is slidably provided on the slide base 20. Lug catch 2
1 includes a pin 21a into which the mounting hole of the lug 16 is inserted, and the front and rear positions are adjusted by screws 22. Further, a support plate 23 is placed on the slide base 201, and a lug presser metal fitting 24 is swingably supported on this support plate 231.

The lug expanding means 18 is configured so that the operating rod of the air cylinder 25 fixed to the fixed portion 141 is connected to the slide base 20.
It is fixed through an angle 26 to the end of the structure.

As shown in FIGS. 2 and 4, the reinforcing metal fitting expanding means 19 is provided corresponding to the central buts of the long and short sides of the reinforcing metal fitting 15, respectively. That is, gas burner 9
A support plate 27 is fixed at four locations on the long and short sides of the frame, and a reinforcing plate holder 28 is provided on the support plate 27 so as to be slidable in the center direction. Reinforcement plate holder 28
1) The operating rod of the air cylinder 29 is fixed to the support plate 27.

Further, a stopper 30 is provided so as to be located on the inner side of the reinforcing metal fitting 15 with respect to the top t of the reinforcing plate holder 28 .

Next, the operation will be explained. At the position where the lifting platform 5 is lowered, first, the pin 21a of the lug seat 21 is inserted into the mounting hole of the lug 16, and the reinforcing metal fitting 15 is positioned and placed on the lug seat 21. Thereafter, for installation, the lug 16 is held down and fixed by the lug holding fitting 24. Next, the lifting platform 5 rises,
The gas burner 9 is located inside the reinforcing metal fitting 15. After that, the cathode ray tube 1 is supplied and placed on the suction rubber 3 and the cathode ray tube holder 4, and the cathode ray tube 1 is positioned by a positioning mechanism (not shown).Subsequently, the vacuum suction of the suction rubber 3 works to securely hold the cathode ray tube 1 by 4 tons. Hold this. Next, motor 10
is activated, and the rotating shaft 11. The cathode ray tube 1 is rotated via the gear 13 and the center shaft 6, and taping is performed by wrapping tape around the outer circumference of the face of the cathode ray tube 1.

After the gas burner 9 rises and stops as described above, the gas burner 9 is ignited to heat and expand the reinforcing metal fitting 9.

At this time, the actuation rod of the air cylinder 25 is retracted, and the actuation rod of the air cylinder 29 is made to protrude. When the actuating rod of the air cylinder 25 is retracted, the slide base 20 is moved outward via the angle 26, and the lug 16 is mounted via the pin 21a of the lug seat 21 so that the lug 16 is moved beyond the amount of thermal expansion of the reinforcing metal fitting 15. The lug 16 is pulled outward with an expansion force of f), and the lug 16 is placed in a predetermined position f).

Further, when the operating rod of the air cylinder 29 protrudes, the reinforcing plate holder 28 is operated in the outward direction, and the stopper 301ζ
Therefore, the center 8 (5) of the reinforcing metal fitting 15 is pulled outward with an expansion force greater than the amount of thermal expansion of the reinforcing metal fitting 15, and the central portion of the reinforcing metal fitting 15 is positioned at a predetermined position t.

After completing the heating of the reinforcing metal fittings 15 and completing the taping of the cathode ray tube I, the vertical cylinder 8 is operated to raise and lower the lifting platform 5. That is, the gas burner 9 and the cathode ray tube mounting table 2 are lowered, and the cathode ray tube 1 is inserted into the reinforcing metal fitting 15. Thereafter, the cylinders 25 and 294 are operated in the opposite direction mJl to release the expansion force applied to the mounting lugs 16 and reinforcing metal fittings 151, and the reinforcing metal fittings 15 are cooled by cooling means (not shown). From this point, the reinforcing metal fitting 15 is contracted and can be fixed to the outer periphery of the face of the cathode ray tube l.

In this way, when heating the reinforcing metal fitting 15, the mounting lug 1
6 and the reinforcing metal fittings 15 are respectively expanded outwardly by the lug expanding means 17 and the reinforcing metal fitting expanding means 19 and positioned at predetermined positions, so that the dimensional accuracy of the reference line of the cathode ray tube 1 and the mounting lug 16 is increased by IrjJ. . Also brown w1
Since the gap between the inner diameter of the reinforcing metal fitting 15 and the long and short sides of the reinforcing metal fitting 15 is constant and sufficient, the cathode ray tube 1 can be smoothly inserted into the reinforcing metal fitting 15.

〔Effect of the invention〕

According to the present invention, it is possible to fit the cathode ray tube and the reinforcing metal fitting in a condition that maintains the relative accuracy, and the dimensional accuracy of the cathode ray tube reference line and the lug for attachment is improved.

Further, a certain gap is sufficiently secured between the reinforcing metal fitting and the cathode ray tube, so that the reinforcing metal fitting can be inserted into the outer circumferential surface of the face of the cathode ray tube without causing any harmful defects.

[Brief explanation of the drawing]

FIG. 1 is a full-length diagram showing an embodiment of the present invention, and FIG. J
FIG. 3 is a front view of the lug receiver means and lug expansion means, and FIG. 4 is a front view of the reinforcing plate expansion means. ■... Braun tube, 9... Gas burner, 1
5...Reinforcement metal fittings, 16...Lug for installation. 18... Lug expansion means, 19... Reinforcement fitting expansion means. Figure 1 Low = 7゛ Round 9: Sword゛°Shi゛°-su (5: Metal to stripe + 6: 1. A size 1 hula 7°゛ 18: U7, Omu 25 & I 12 19: Ne 111 strong @ 4-stage tool expansion■LOψΦ

Claims (1)

[Claims] 1. In an explosion-proof cathode ray tube manufacturing device in which a reinforcing metal fitting heated and expanded using a gas burner is inserted into the outer periphery of the face of a cathode ray tube and fixed by cooling and shrinking, the expansion exceeds the amount of thermal expansion of the reinforcing metal fitting when heated by a gas burner. A manufacturing device for an explosion-proof cathode ray tube, characterized in that an expansion means for applying force in an outward direction is provided.