JPS6319975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly apparatus for an electron gun assembly suitable for a cathode ray tube.

Generally, the assembly of the electron gun structure is as shown in FIGS. 1 and 2.
A plurality of electrode support rods 5 that hold 3, 4, and G4 in a coaxial relationship are engaged with guide shafts 6 and 6' and attached to a base 7, and pressurize the electrodes etc. inserted into the electrode support rods 5. It is temporarily assembled using an electron gun structure assembly jig that is pressurized and held by the mechanism 10 and can also hold the cathode support 8, heater support 9, etc., and finally the outside of each grid electrode is assembled. An electrode support 12 as shown in FIG. 3 is embedded and assembled into a plurality of glass insulator rods 11 for fixing the electrode.

FIG. 4 is a side view of the main parts of a conventional electron gun structure assembly device, and in the drawing, an electron gun structure assembly jig 13
is inserted and held in the holder 14. The glass insulator rod 11 is placed on the holding bed 15, and after being heated and melted by the gas burner 16, the rod 18 of the air cylinder 17 is pushed up and held by the arms 19 and 20 that engage with the rod 18. The bed 15 moves circularly about the fulcrum 21 and is pressed against and embedded in supports such as grid electrodes that are temporarily assembled in the electron gun assembly assembly jig 13.

In such a conventional assembly method, since the glass insulator rod 11 follows a locus of circular motion, the direction in which the supports such as each grid electrode are embedded is not at right angles, and the circular motion of the glass insulator rod 11 is not perpendicular. In the lower part of the electron gun assembly assembly jig 13 where the equivalent radius of the trajectory is short, the embedded angle of the glass insulator rod relative to the support body deviates greatly from the right angle, so the glass insulator rod bulges around the support body, and the support The embedding area of the support body is reduced, sufficient electrode fixing strength cannot be obtained, and excessive residual thermal stress is likely to occur around these supports. If thermal stress remains, the thermal history during the manufacturing process of cathode ray tubes can cause minute cracks in the glass insulator rod, producing microscopic glass fragments that are harmful to the manufacture of cathode ray tubes, or even breaking the glass insulator rod. There are problems such as the occurrence of

In FIG. 4, the glass insulator rods 11 are usually embedded from both the left and right sides (the left side is not shown), but the glass insulator rods on both the left and right sides are inserted into the support bodies on the left and right sides of each grid electrode, etc. Although the electron gun assembly assembly device has been manufactured with mechanical precision so that 11 is embedded at exactly the same time, due to variations in the melting state of the glass insulator rods, wear and tear of the holding bed, etc. In practice, it is difficult to embed the glass insulator rod at the same time, and the force applied to the electron gun structure assembly jig will vary from side to side when embedding the glass insulator rod. It has the disadvantage that considerable force is generated between the tool and the jig.

As mentioned above, the molten state of the glass insulator rod,
Depending on the embedding direction, embedding method, etc., there is a problem in that the relative position between each grid electrode of the electron gun assembly removed from the electron gun assembly assembly jig changes compared to when it is temporarily assembled.

Further, the glass insulator rod 11 is attached to its holding bed 1.
Since the glass insulator rod 11 is heated and melted by a gas burner 16 on top of the glass insulator 11 and then pushed up for embedding, the glass insulator rod 11 is air-cooled while being moved for embedding. It is necessary to lengthen the heating and melting time of the body rod, and the moving time for embedding the glass insulator rod results in so-called loss time, and the conventional electron gun assembly assembly apparatus has the problem of low work efficiency.

It is an object of the present invention to provide an electron gun assembly assembly apparatus that solves the problems of the above-mentioned assembly method using the conventional electron gun assembly assembly apparatus.

According to the present invention, in assembling an electron gun assembly in which insulator rods for fixing various electrodes, etc. are embedded in respective supports for various electrodes, etc. held in an electron gun assembly assembly jig, one room is provided. An electron gun assembly assembly apparatus is obtained in which the pressing force of a plurality of heated and melted insulator rods is balanced using a tandem fluid cylinder such as a two-rod air cylinder.

Specifically, by moving the insulator rod in a straight line,
An electron gun assembly assembly device is obtained, which is characterized in that it is pressed perpendicularly to each support and embedded. Further, when heating and melting the insulator rod, an electron gun assembly assembly apparatus is obtained, which is characterized in that the insulator rod is heated in a follow-up manner while the insulator rod is being moved.

This invention will be explained below with reference to the drawings. FIG. 5 is a plan view showing essential parts of the electron gun assembly assembly apparatus of the present invention, and FIG. 6 is a side view thereof. In these figures, the left-hand side shows the holding bed of the glass insulator rod in its lowered position, and the right-hand side shows it in its raised position.

In these drawings, 50 is a 1-chamber, 2-rod air cylinder (hereinafter referred to as tandem air cylinder);
Rods 51 at both ends of the rod 51 are engaged with a slide bed 52, and the slide bed 52 is configured to slide on a slide shaft 53 in conjunction with the movement of the rods 51. A slide bed 54 is engaged with the slide bed 52 by a spring 55.
The slide bed 54 is configured to be able to slide on a slide shaft 56.

The slide bed 54 is provided with a fulcrum 58 for the support arm 57 of the bed 15 that holds the glass insulator rod 11, and when the rod 51 of the tandem air cylinder 50 is retracted or pushed out,
Slide bed 52, support arm 57 and arm 5
The holding bed 15 is configured to be pushed up or down about the fulcrum 58 by the links 9. Also slide bed 52
A vertical adjustment mechanism 6 is provided for pressing the support arm 57 to regulate the verticality of the glass insulator rod 11.
0 is provided, and after the support arm 57 is pushed up vertically, the rod 51 of the tandem air cylinder 50 is further retracted, so that the support arm 57 is vertically pressed by the vertical adjustment mechanism 60, and the support arm 57 is pushed vertically together with the slide bed 52. It is configured to horizontally move a certain distance on the slide shaft 53 in the direction of the electron gun assembly assembly jig 13. The slide bed 54 is provided with a stopper mechanism for regulating the distance of this horizontal movement, and a stopper mechanism 62 is embedded on the electron gun assembly assembly jig 13 side.
A horizontal movement stopper 61 is provided on the opposite side thereof, a fixed column 63 is fixed to the main body of the tandem air cylinder 50, and the tandem air cylinder 50 is fixed to a base plate 64.

FIG. 7 is a side view showing the main parts of the follow-up mechanism of the gas burner 16. The gas burner 16 is fixed to one end of the arm 66 via an arm 65, and the arm 66 is connected to the support arm 5 of the holding bed 15.
It is fixed to the slide bed 54 at the same fulcrum 58 as 7. The other end of the arm 66 is engaged with the slide bed 54 via a spring 67. A regulating piece 68 for regulating the rising movement of the arm 66 by the support arm 57 is provided on the arm 66.
6, and the arm 66 is attached to the spring 67.
Since the arm 66 is constantly being pulled and trying to rise, as the support arm 57 is pushed up, the arm 66 is configured to rise while contacting the support arm 57 with the regulating piece 68. In response to a signal from a burner escape detection micro switch 68 (shown in FIG. 5), one end 69 of the arm 66 is pulled by a burner escape air cylinder 70, causing the arm 66 to
6-1 and arm 66-2 are bent at their joint shafts 73, and the gas burner 16 is pulled away from the holding bed 15, and the holding bed 15 and the support arm 57 are bent.
Stopper 74 in a position that does not hinder the pushing up of the
It is configured so that it can be stopped. The stopper 74 is fixed to the slide bed 54 by a stopper mechanism 75.

By configuring the electron gun assembly assembly apparatus as described in detail above, various problems in assembling methods using conventional electron gun assembly assembly apparatuses can be solved. In other words, in the conventional assembly method, the glass insulator rod is embedded following the locus of circular motion;
In the assembly method of the present invention, the glass insulator rod is embedded in the support such as each grid electrode at right angles by horizontal movement after following the locus of circular motion.
Due to the equivalent radius of the circular motion of the glass insulator rod, excessive residual thermal stress will not be generated around the support, and the problem of reducing the embedded area of the support can also be solved. In addition, when the force associated with the start of embedding the glass insulator rod is first applied to the rod on the left side of the tandem air cylinder and no force is applied to the rod on the right side, the air pressure inside the tandem air cylinder does not increase and the force on the left side rod is initially applied. The rod on the right side continues to push out while the rod is stopped while maintaining the force associated with the start of embedding the glass insulator rod.
When the force applied to both the left and right rods becomes equal, the air pressure inside the tandem air cylinder increases, and the same force is applied to both the left and right rods at the same time, causing the glass insulator rods to move horizontally at the same time and become embedded in each support. become. By using the tandem air cylinder in this manner, it is possible to solve the problem of the conventional assembly method in which the force applied to the electron gun assembly assembly jig varies from side to side when embedding the glass insulator rod.

In addition, by providing a tracking mechanism with the holding bed of the gas burner, heating continues for a certain period of time even during the movement of the holding bed, so the entire movement time of the holding bed does not become so-called loss time, improving work efficiency. This can solve the conventional problem of low performance.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional electron gun assembly assembly jig, Fig. 2 is a sectional view of the assembled electron gun assembly, Fig. 3 is a perspective view of the electrodes, and Fig. 4 is a conventional electron gun assembly device. 5 and 6 are respectively a plan view and a side view of an embodiment of the present invention, and FIG. 7 is a side view of a gas burner follow-up mechanism. 11... Glass insulator rod, 16... Gas burner, 50... Tandem air cylinder, 51...
Rod, 52...Slide bed.

Claims (1)

[Scope of Claims] 1. In the assembly of an electron gun assembly in which fixed insulator rods such as various electrodes are embedded in respective supports for various electrodes etc. held in an electron gun assembly assembly jig, tandem fluid An electron gun assembly assembly apparatus characterized in that a plurality of heated and melted insulator rods are linearly moved using a cylinder, and are pressed and embedded at right angles to each support. 2. The electron gun assembly assembly apparatus according to claim 1, wherein when heating and melting the insulator rod, follow-up heating is performed even during movement of the insulator rod.