JPH0446360Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a cathode ray tube exhaust device used in the manufacturing process of cathode ray tubes.

(Prior Art) The evacuation operation of a cathode ray tube is performed by mounting the cathode ray tube on an evacuation truck of a transport device. This exhaust truck has an exhaust system using a vacuum pump system.
The inside of the mounted cathode ray tube is evacuated using the vacuum pump mentioned above. In this case, in order to increase the degree of vacuum inside the cathode ray tube, the cathode ray tube is usually passed through an exhaust furnace using a carrier, and the cathode ray tube is heated and evacuated in the exhaust furnace.

FIG. 3 shows the overall structure of the conventional exhaust system described above. In the figure, reference numeral 11 denotes a conveying device, which is driven by a drive device 11a, and includes a plurality of exhaust trucks 12.
is moved along an elliptical trajectory including the exhaust furnace 13. Although not shown, this exhaust truck 12 has a vacuum pump type exhaust device, and is shown in FIGS. 4 and 5.
As shown in the figure, the interior of the cathode ray tube 14 mounted on the exhaust truck 12 is evacuated to create a vacuum.
Further, on the exhaust truck 12, the cathode ray tube 14 is mounted.
A cage 15 is provided surrounding the periphery.

Here, when the cathode ray tube 14 mounted on the exhaust truck 12 passes through the exhaust furnace 13, the exhaust furnace
3, it is heated and exhausted. At this time, the cathode ray tube 14 may implode (destruction as if shrinking due to the vacuum inside) due to scratches on the glass, which is the material of the cathode ray tube 14, or thermal distortion due to heating. The above-mentioned cage 15 is provided to prevent glass fragments from scattering onto the adjacent exhaust truck 12 and causing a chain implosion. The cage 15 also prevents fragments generated by implosion from falling into the exhaust furnace 13 and interfering with the movement of the exhaust truck 12 or damaging the interior of the exhaust furnace 13.

The cage 15 is made of mesh or a perforated iron plate so that high temperature gas for heating the cathode ray tube 14 can pass therethrough. Moreover, this cage 15 is
In order to place the cathode ray tube 14 on and off the exhaust truck 12, two
The structure is such that one side of the split can be opened and closed.
That is, after the cage 15 is opened and the cathode ray tube 14 is mounted, the cage 15 is closed to surround the cathode ray tube 14 as shown in FIG. 4, and then passed through the exhaust furnace 13 and evacuated while being heated. When the exhaust truck 12 comes out of the exhaust furnace 13 after exhausting, the cage 15 is opened again and the cathode ray tube 14 inside the cage 15 is taken out.

It is difficult to open and close the cage 15 described above manually, and a dedicated cage opening/closing device is usually used. That is, as shown in FIG. 3, a cage closing device 17a is provided near the entrance of the exhaust furnace 13. Therefore, in the exhaust truck 12 entering the exhaust furnace 13, the movable part 15a of the cage 15 closes and the cathode ray tube 1
Protect 4. By this closing operation of the cage 15, the cage 15 itself becomes in a shape that allows it to pass through the inside of the exhaust furnace 13. Further, a cage opening device 17b is provided near the outlet of the exhaust furnace 13. Therefore, in the exhaust truck 12 that has passed through the exhaust furnace 13, the movable part 15 of the cage 15
a is lifted by the cage opening device 17b and placed in the open state. Thereafter, the cathode ray tube 14 inside the cage 15 is taken out manually or by a transfer device. Furthermore, the conveyance trajectory of the conveyance device 11 is an ellipse, and the cage 15 must be closed at the turning portion at the end thereof. For this reason, a cage closing device 17c is provided near the entrance of the rotating section on the right side of the figure, and a cage opening device 17d is provided at the exit portion. That is, when the exhaust truck 12 reaches the entrance of the rotating part in the direction shown in the figure, the cage 15 is closed by the cage closing device 17c and enters the rotating state. When the exhaust truck 12 comes to the straight section after turning, the cage 15 is opened again by the cage opening device 17d. After that, insert the new cathode ray tube 14 into the open cage 1.
The cage 15 is mounted on the exhaust truck 12 via the cage 5, the cage 15 is closed by the cage opening device 17a, and the cage 15 is moved into the exhaust furnace 13 to perform heating and exhaust.

(Problem to be solved by the invention) In this way, in an exhaust system using an openable cage 15, there are usually a total of four cage opening/closing devices 17.
It is necessary to provide a, 17b, 17c, and 17d. Moreover, this cage opening/closing device 17a, 17b,
Since it is not possible to attach and detach the cathode ray tubes 14 near the tubes 17c and 17d, in order to secure this work space, it is necessary to adopt a configuration in which a large number of exhaust trolleys 12 are laid out outside the exhaust furnace 13, and the equipment is Increase in size. Furthermore, since the cage 15 is heavy and can be opened and closed, if it is heated in the exhaust furnace 13, the movable part 15a will rust, which may cause an accident. Further, although it is originally necessary to heat only the cathode ray tube 14 in the exhaust furnace 13, the cage 15 is also heated, which increases the energy consumption of the exhaust furnace 13.

The purpose of the present invention is to provide a cathode ray tube exhaust device that allows the cathode ray tube to be easily attached and detached without opening and closing the cage, requires a small work space, and can also reduce wasted power for heating the cage. It is in.

[Structure of the idea]

(Means for Solving the Problems) The cathode ray tube exhaust device according to the present invention is a cathode ray tube exhaust device in which a cathode ray tube is mounted on an exhaust truck, and the cathode ray tube is surrounded by a cage and passed through an exhaust furnace to heat and exhaust the tube. In this case, the cage has an open upper surface and a partial opening on one side.

(Function) According to the present invention, the cathode ray tube can be attached to and detached from the exhaust truck without opening or closing the cage.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, a cathode ray tube 14 is mounted on an exhaust truck 12 having a vacuum pump system as in the past, and a cage 19 surrounds the cathode ray tube 14.
surrounded by. This cage 19 prevents fragments from scattering when the cathode ray tube 14 implodes, but the upper surface 19a, which has little effect on scattering to the surroundings, is open, and one side (the front in this case) is partially A typical opening 19b is provided. Here, as for the dimensions of each part of the opening 19b, it is preferable that the dimension a shown in FIG. 1 is 200 mm, and the dimension b from the top surface of the cathode ray tube 14 to the upper surface of the front portion 19c is about 150 mm. The larger the dimensions a and b are, the easier it becomes to attach and detach the cathode ray tube 14 to and from the exhaust truck 12. However, if it is too large, when the cathode ray tube 14 implodes, glass fragments will fall out of the cage 19 and be caught between the inner wall of the exhaust furnace 13 and the cage 19, damaging the exhaust truck 12 and its transport mechanism. It will be damaged.
Therefore, the dimensions described above are preferred.

Further, as described above, since the cage 19 has an open top surface 19a and a partial opening 19b on one side, some glass fragments may be scattered outside the cage 19 when the cathode ray tube 14 implodes. Conceivable. In this case, some of the scattered fragments
There is a risk that the blower will hit the inner wall of the exhaust truck 12 and again enter the cage 19 of the adjacent exhaust truck 12, hitting the cathode ray tube 14 inside the cage 19 and damaging it.

In order to prevent this, the distance c between the outer surface of the cage 19 and the inner surface 13a of the exhaust furnace 13 should be made sufficiently small, as shown in FIG.
However, since the cage 19 is heated in the exhaust furnace 13 and undergoes thermal deformation, if the interval c is made too small, the cage 19 will become difficult to pass through the exhaust furnace 13 due to thermal deformation. Therefore, it is preferable to set this interval c to about 20 mm. That is, if the interval c is set to the minimum dimension that allows the passage space for the exhaust truck 12 to pass through the exhaust furnace 13, even if the upper surface of the cage 19 is open and there is a partial opening 19b on one side, the cathode ray tube 1
The glass fragments caused by the implosion of No. 4 will not be scattered around, and will not damage another cathode ray tube 14 in the cage 19 of the adjacent exhaust truck 12.

[Effect of idea]

As described above, according to the present invention, when a cathode ray tube is heated and exhausted, a cage with an open top surface and a partial opening on one side is used as a cage surrounding the cathode ray tube. There is no need to open and close the cage, so the cage opening and closing device that was conventionally required is no longer necessary, and the space required for opening and closing is also no longer necessary. Therefore, the number of exhaust trucks to be provided on the transport device can also be reduced. Furthermore, since the weight of the cage is reduced and there are no moving parts, the energy consumption of the exhaust furnace can be suppressed, and the cage itself is simple and difficult to break, eliminating the possibility of accidents due to cage breakage.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the main parts of an embodiment of the cathode ray tube exhaust device according to the present invention, Fig. 2 is a front view showing the relationship between the device in Fig. 1 and the exhaust furnace, and Fig. 3 is the entire conventional device. Plan view showing the configuration, Figures 4 and 5
The figure is a perspective view showing the states of the cage and cathode ray tube on the exhaust truck used in FIG. 3 when the cage is closed and when the cage is open, respectively. 12... Exhaust truck, 13... Exhaust furnace, 14...
Braun tube, 19...cage, 19a...top surface,
19b...Opening.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cathode ray tube exhaust device in which a cathode ray tube is mounted on an exhaust cart, the cathode ray tube is surrounded by a cage and passed through an exhaust furnace to perform heating and exhaust, the cage has an open top surface. Also, a cathode ray tube exhaust device characterized by having a partial opening on one side.