JPS61158846A - Heat-welding apparatus - Google Patents

Abstract

PURPOSE:To provide the titled apparatus having simplified mechanism for rotating a burner, and enabling high-accuracy welding, by using a rotational driving apparatus to swing a ring-shaped line burner reciprocally along the outer circumference of a glass bulb within a prescribed rotational angle. CONSTITUTION:A glass bulb 4 is mounted to a bulb holder 3, and an electron gun 26 is attached to the tip end of the mount holder 25 of the lowest position. The mount holder is lifted and maintained at a prescribed welding part in the neck of the glass bulb 4. The ring-shaped burner 5 is lifted with an air cylinder 24 to a prescribed welding part of the neck of the glass bulb 4, and the burner 5 is swing within a prescribed rotational angle alpha by energizing the motor 21, and at the same time, gas is supplied to the ring-shaped line burner to heat the welding part of the glass bulb 4 uniformly. After the heat-welding, the ring-shaped burner 5 and the mount holder 25 are lowered by the procedures reverse to the above, the neck part of the glass bulb 4 below the welded part is removed from the mount holder 25 and the apparatus is returned to the stage for the welding of the next glass bulb 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat sealing device used for sealing a glass bulb such as an electron tube and a sealed component such as an electron gun.

[Technical background of the invention and its problems] Conventionally, when sealing a glass bulb such as an electron tube and an electron gun, the glass bulb is held in a bulb holder, while the electron gun is held at the tip of the mount holder. The sealing area of the glass bulb is then surrounded by a cross fire made up of several single burners, which uniformly heats the area around the sealing area. Welding was done.

The welding equipment used in this method is (a)
As shown in FIG. 3, a pair of line burners 1.1 are arranged with the nozzle 1a side facing each other with the sealed portion 2a of the glass bulb 2 in between, and these line burners 1.1 are arranged as shown by arrows. A device configured to rotate around the sealed portion 2a to uniformly heat the sealed portion to avoid welding, and (b) a pair of line burners 1 as shown in FIG.
1 with the sealing part 2a of the glass bulb 2 in between, with the nozzle 1a side facing each other, these line burners 1.1 are fixed, and the glass bulb 2 is placed with the neck part as the center as shown by the arrow. A device is used that is configured to uniformly heat and weld the sealed portion by rotating the sealing portion.

However, all of these conventional devices have a structure in which either the line burner 1.1 or the glass bulb 2 is rotated, resulting in uneven heating due to misalignment of the tip of the burner frame, and the initial setting of the glass bulb. There has been a problem in that welding accuracy tends to deteriorate due to mechanical fluctuations in position and the like.

In addition, this method requires complex mechanisms such as a burner rotation mechanism, a fuel supply mechanism to the rotating burner, and a glass bulb rotation mechanism, which makes the entire device complex and is inconvenient for maintenance. There was a problem.

[Object of the Invention] The present invention has been made to solve these conventional problems, and an object of the present invention is to provide a heat sealing device that has a simplified burner rotation mechanism and is capable of high-precision welding. shall be.

[Summary of the Invention] That is, the heating pair @ device of the present invention includes: a bulb holder that holds a glass bulb; a mount holder that holds a sealed component at a sealed portion of the glass bulb held by the bulb holder; A heat sealing apparatus comprising a burner having a plurality of nozzles arranged surrounding a sealed portion of a glass bulb, and a rotation drive device that rotates the burner along the outer periphery of the glass bulb, the burner comprising: A ring-shaped line burner has a plurality of nozzles arranged inward on the same circumference at approximately equal intervals, and the rotation drive device rotates the ring-shaped line burner at a predetermined rate along the outer periphery of the glass bulb. By using a swinging device that rotates forward and backward within an angle, it prevents uneven heating due to misalignment of the tip of the burner frame and deterioration of welding accuracy due to mechanical fluctuations in the initial setting position of the glass bulb. This is a simplified version of the configuration.

[Embodiments of the invention] An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 is a side view showing the configuration of an embodiment of the present invention, and FIG. 2 is a plan view showing the main parts thereof.

In these figures, 3 is a bulb holder that holds a glass bulb 4 such as a cathode ray tube, and is supported by a horizontal support part 3a that holds the panel part of the glass bulb 4 and a vertical support part 3b that supports the base of the funnel. ,
The glass bulb 4 is held substantially vertically with its neck facing downward.

Reference numeral 5 denotes a known ring-shaped line burner, which is constructed by arranging a large number of nozzles 5a on the same circumference at approximately equal intervals in the tangential direction of the sealed portion.

6 is a rocking device for the ring-type line burner 5,
A turntable 7, a support shaft 8 with a through hole in the center whose upper part is fixed to the turntable 7 and whose lower part is rotatably supported, and a forward and reverse rotation that rotates the turntable 7 forward and backward within a predetermined rotation angle! 1! It is composed of a mechanism 9 and a vertical drive mechanism 10 for raising and lowering the turntable 7.

The turntable 7 has a disc shape with a through hole in the center, and horizontally supports the ring-shaped line burner 5 via a support 7a.

The support shaft 8 is a cylindrical cam that is vertically supported by a bearing 11 fixed within the machine frame, and whose upper end is coaxially fitted and fixed into a through hole of the turntable 7, and whose lower end is fixed to its outer periphery. It is rotatably supported by a cam follower 13 of the vertical drive mechanism 10 fitted into a follower receiver 12 .

The forward/reverse mechanism 9 includes two guide rods 14 fixed to the edge of the turntable 7 parallel to its rotation axis, a slider 15 slidably attached to these guide rods 14, and a slider 15 with one end. A crank arm 16 is pivotally connected to the slider 15, and the apex of the L shape is rotatably supported on a pedestal 17 fixed under the machine frame, and one end of the L shape is pivotally connected to the other end of the link 16. and a heart cam 2 that swings the cam follower 18 of the L-shaped lever 19 within a predetermined rotation angle α.
0 and a motor 21 that rotates the heart cam 20.

The vertical drive machine Mf110 is provided with a cam follower 13 engaged with a cam follower receiver 12 at one end of the rhomboid shape, and an L-shaped bar 23 whose apex of the L shape is pivotally connected to a support base 22 positioned below the machine frame. and an air cylinder 24 having an operating end of a piston 24a attached to the other end of the L-shaped bar 23.

Reference numeral 25 denotes a mount holder disposed through the support shaft 8, which is configured to be capable of being raised and lowered by an up-and-down drive mechanism (not shown) with an electron gun 26 attached to its upper end.

Although not shown, a flexible tube for gas supply is connected to the ring-shaped burner 5, and this flexible tube is opened when the vertical drive mechanism is in the up-down position and closed when it is in the down position. A solenoid valve is provided. Further, the ring-shaped burner 5 is provided with a pilot burner to which gas is supplied through a flexible tube in a separate system.

Next, the operation of the heat sealing apparatus of the present invention will be explained.

First, the glass bulb 4 is attached to the bulb holder 3, and the electron gun 26 is attached to the tip of the mount holder 25 which is in the lowered position, and the electron gun 26 is brought up and held in a predetermined sealing part in the neck of the glass bulb 4. Next, the air cylinder 24 is operated to raise the ring-shaped burner 5 to a predetermined sealing area of the neck of the glass bulb 4, and the motor 21 is driven to swing the ring-shaped line burner 5 within a predetermined rotation angle α. At the same time, gas is supplied to the ring-shaped line burner 5 to uniformly heat the sealed portion of the glass bulb 4.

After heating and sealing the sealing part in this way, the ring-shaped burner 5 and the mount holder 25 are lowered in the reverse order to the above, and the neck part of the glass bulb 4 below the welding part is moved from the mount holder 25. Remove it and prepare for sealing the next glass bulb 4.

Since the heat sealing device of the present invention is configured as described above, neither the bulb holder nor the ring-shaped line burner requires a rotation mechanism, so the entire device can be configured simply. Fuel gas can be supplied to the ring-shaped line burner using conventional flexible tubes. Furthermore, since the burner is ring-shaped, even if the rotation angle is small, the entire circumference of the welding area can be heated uniformly.Furthermore, the rotation angle of the ring-shaped line burner is small, which improves welding accuracy. .

[Effects of the Invention] As explained above, the heat sealing device of the present invention can heat the sealing portion of a glass bulb with high precision, has a simple configuration, and is easy to operate and maintain. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a plan view showing the main parts thereof, Fig. 3 is a plan view schematically showing the main parts of a conventional heat sealing device, and Fig. 4 FIG. 2 is a plan view schematically showing the configuration of another conventional heat sealing device. 3...... Valve holder 4...
・・・・・・・・・Glass bulb 5・・・・・・・・・・・・
・Ring type line burner 6・・・・・・・・・・・・
Rocking device 7...Turntable 8...
......Support shaft 9...Forward and reverse rotation mechanism 10...
・・・・・・Vertical drive mechanism 11・・・・・・・・・
...Bearing 12...Cam follower bearing 13.
18...Cam follower 14...Guide rod 15...
・・・・・・Slider 16・・・・・・・・・・・・
・Crank arm 19.23...L-shaped bar 20...Heart cam 21...
......Motor 24...F cylinder 25...
...Mount holder 26...
・・・・・・Electronic gun representative Patent attorney Sa Suyama - Figure 3 Figure 4

Claims (4)

[Claims] (1) A bulb holder that holds a glass bulb, a mount holder that holds a sealed component at the sealed portion of the glass bulb held in the bulb holder, and a plurality of mount holders arranged around the sealed portion of the glass bulb. A heat sealing apparatus comprising: a burner having a nozzle; and a rotation drive device for rotating the burner along the outer periphery of the glass bulb; The ring-shaped line burners are arranged at approximately equal intervals, and the rotary drive device is a rocking device that rotates the ring-shaped line burners forward and reverse within a predetermined rotation angle along the outer periphery of the glass bulb. Features of heat sealing equipment. (2) A rocking device includes a turntable on which a ring-shaped line burner is mounted, a support shaft whose upper part is fixed to the turntable and whose lower part is rotatably supported, and one end of which is connected to the turntable or the support shaft. 2. The heat sealing apparatus according to claim 1, comprising a crank arm pivotally mounted to allow relative movement in the vertical direction, and a drive mechanism for reciprocating the crank arm. (3) Claim 1, characterized in that the mount holder is equipped with a drive mechanism that moves the tip up and down toward the sealing part of the glass bulb held in the bulb holder.
The heat sealing device according to item 1 or 2. (4) The heat sealing device according to any one of claims 1 to 3, wherein the sealed component is an electron gun.