JPS6217345B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an apparatus for manufacturing a bulb, such as a fluorescent lamp, which seals a bulb and a stem, exhausts the inside of the bulb, and seals and cuts an exhaust pipe. .

[Conventional technology]

For example, in fluorescent lamps, there is a sealing process in which the periphery of a stem mounted on the open end of a straight tube bulb is welded, and then the inside of the bulb is exhausted through an exhaust pipe protruding from the stem. ,
There is also an exhaust process in which a filler such as mercury or an inert gas is filled through the exhaust pipe, and the exhaust pipe is further sealed off. Conventionally, the sealing process and the exhaust process are each independent, and between these processes it is necessary to transfer the lamp from the previous process to the post process, and at the same time, it is necessary to prevent burnout due to the flame of the sealing burner. Therefore, it was necessary to shape the lead wires that were close to the exhaust pipe so that they were moved away from the exhaust pipe during the exhaust process, which not only resulted in poor work efficiency such as the inability to improve manufacturing speed, but also complicated and expensive processes. This method has various drawbacks, such as requiring a large amount of equipment, making the entire equipment in the factory complicated and requiring a large space.

For this reason, the applicant has researched a manufacturing device that can perform the sealing process and the exhaust process continuously in a single device without changing valves.
It is currently under development, and one example is the
No. 156818 (Japanese Unexamined Patent Publication No. 54-88678).

The tube manufacturing apparatus of the prior application includes a mount holder that holds a stem and has a lead wire insertion hole through which a lead wire led out from the stem is passed, and a mount holder that is provided coaxially within the mount holder and that holds the stem. a chipping burner that allows an exhaust pipe protruding from the holder to pass freely therethrough and has a flame hole opened on the inside facing the outer peripheral surface of the exhaust pipe; a sealing burner having a flame hole directed toward the abutting part with the opening edge of the tube bulb and heating and melting the abutting part; and a sealing burner that tightly supports the exhaust pipe and exhausts the inside of the valve through the exhaust pipe. The valve is also equipped with an exhaust head that sends the filler into the valve through the exhaust pipe.

[Problem that the invention seeks to solve]

However, in the manufacturing apparatus configured as described above, the sealing burner is placed outside the mount holder, so the mount holder and the chipping burner are present inside the sealing burner. For this reason, the diameter of the sealed burner has to be considerably large.

However, the flame hole of the sealed burner has conventionally been formed to be inclined forward and outward, and this combined with the large diameter of the sealed burner means that the gas flame injected from the flame hole is The diameter expands considerably at the end. Therefore, a problem arises in that the valve can only be applied to valves with a large sealed end diameter, for example, 32 mm or more.

The present invention aims to provide a tube manufacturing apparatus that can seal even a valve having a small sealing end diameter by heating and melting.

[Means for solving problems]

The present invention is characterized in that the flame hole of the sealed burner is formed to be inclined toward the front and inside.

[Effect]

With this configuration, the gas flame ejected from the flame hole of the sealed burner becomes finer at the tip.
Even if the diameter of the sealed end of the valve is small, it can be sealed, and since the gas flame heats the flared portion of the stem well, reliable sealing can be achieved.

[Embodiment of the Invention] An embodiment of the present invention will be described below based on the drawings.

1 in the figure is a bulb of a tubular fluorescent lamp,
A phosphor coating (not shown) is formed on the inner surface.
Reference numeral 2 denotes a mount, in which the opening edge of the flare portion 4 of the stem glass 3 faces the opening edge of the bulb 1, and the stem glass 3
Lead wires 5, 5 are passed through and sealed, and have a filament 6 at one end. Further, the stem glass 3 has an exhaust pipe 7 sealed therein.

Reference numeral 10 denotes a base body, which can be moved in a direction opposite to the direction of arrow A by a drive device (not shown). An annular sealed burner 11 is attached to the front surface of the base body 10, and this sealed burner 11 has flame holes 12 that are inclined from the outside toward the front inner center. Note that this sealed burner 11
and the base 10 form a gas passage 13, and this gas passage 13 communicates with a gas supply pipe (or hose) 13a. A mount holder 14 is integrally attached to the center of the base 10 through the base body 10, and the tip 14a of the mount holder 14 fits into one side of the flared portion 4. It is designed for positioning.
Two lead wire insertion holes 15 and 16 are formed through the mount holder 14 along the axial direction. The mount holder 14 also has a tip 14a.
Outside air communication holes 16, 16 are opened in the side wall at a position close to. A recess 17 is formed between the mount holder 14 and the sealed burner 11, and a batting plate 18 is disposed in the recess 17. As shown in FIG. 2, this butting plate 18 is connected to the tips of guide rods 20, 20 that are slidably inserted into guide holes 19, 19 formed in the base body 10 along the axial direction. and
The guide rods 20, 20 are constantly attracted and biased in a direction opposite to the direction of arrow A by coil springs 21, 21 attached to the rear end portions of the guide rods 20, 20. The butting plate 18 is adapted to advance from the recess 17 in the axial direction, that is, in the direction of arrow A, by pushing a pressing plate 22 provided at the rear end of the guide rods 20, 20 in the direction of arrow A. Note that the press plate 22 has a through hole 23 through which the exhaust pipe 7 and the lead wires 5, 5 pass.
is formed.

A chipping burner 24 is fitted into the mount holder 14. Chipping burner 2
4 has a loose insertion hole 25 in the center thereof through which the exhaust pipe 7 passes loosely, and flame holes 26 are opened on the inner surface of the front end portion of this loose insertion hole 25. The flame holes 26 are formed at positions corresponding to the outside air communication holes 16, 16. The flame holes 26 are communicated with a gas supply pipe (or hose) 28 via a gas passage 27 formed within the chipping burner 24.

On the other hand, at the rear of the base body 10, an exhaust head 30 is provided which moves independently of the base body 10 in the A direction, in the opposite direction to the A direction, or integrally with the base body 10. This exhaust head 30 is normally used, and is provided with a fastening rubber 31 approximately in the center, so that the exhaust pipe 7 introduced into the introduction hole 32 is tightly fastened with this fastening rubber 31. ing. Note that 33 is a pipe (or hose) that supplies pressurized air into the tightening rubber 31, and 34 is an exhaust hole that exhausts the inside of the valve 1 via the exhaust pipe 7, which also serves as an inlet for mercury or inert gas. are doing.

However, the operation of such a configuration will be explained.

The base body 10 and the exhaust head 30 receive the mount 2 while being moved in the direction opposite to the direction of arrow A, either integrally or independently of each other. In this case, the exhaust pipe 7 is passed through the loose insertion hole 25 of the chipping burner 24 from the tip 14a of the mount holder 14 and entered into the introduction hole 32 of the exhaust head 30, and at this time, the lead wires 5 and 6 are inserted into the lead wire insertion hole 15. ,1
Penetrate within 5. The flare tube 4 of the mount 2 is connected to the tip 14a of the mount holder 14.
When it contacts and matches, the pipe 33 of the exhaust head 30
Pressurized air is sent in from the inside to reduce the inner diameter of the fastening rubber 31, and the exhaust pipe 7 is fastened and supported by the fastening rubber 31.

In the course of such operation, the valve 1 is supported by a chuck (not shown) and is sent along the direction of arrow B in FIG. 1 to the position shown, where it stops and waits.

The base body 10 supporting the mount 2 and the exhaust head 30 move in the direction of arrow A, and stop when the peripheral edge of the flare portion 4 comes into contact with the opening edge of the valve 1.

Then, when the sealed burner 11 is ignited, the flame hole 1
A gas flame injected from the valve 2 is directed toward the contact portion between the bulb 1 and the flare portion 4, and the gas flame heats and melts these contact portions. With this melting, the valve 1 and the flare portion 4 are sealed, and during this sealing, the pressing plate 22 is moved forward in the direction of arrow A by an actuator (not shown). Then, the butting plate 18 moves forward against the coil springs 21, 21, and lightly presses the abutting portion between the heated and melted bulb 1 and the flare portion 4, thereby promoting the mutual familiarization of these glasses. Note that this pressing is performed once to several times during the sealing operation.

When the sealing between the valve 1 and the flare portion 4 is completed in this way, the sealing burner 11 is extinguished.

From the final stage of this sealing process, the inside of the valve 1 which communicates with the exhaust pipe 7 may be evacuated through the exhaust hole 34 of the exhaust head 30. However, once the sealing work is completed, the valve 1 is evacuated from the exhaust hole 34 through the exhaust pipe 7. Exhaust the inside of valve 1. At this time, the lead wires 5, 5 led out through the lead wire insertion holes 15, 15 of the mount holder 14 are connected to a power source to turn on the filament 6, and the coating material applied to the filament 6 is decomposed. and release of adsorbed impurities. Note that this process is called flushing. After that, the valve 1 is opened through the exhaust hole 34 and the exhaust pipe 7.
The evacuation process is completed by introducing mercury and sealing inert gas into the chamber.

After completing this work, chipping burner 2
4, and a gas flame is ejected from the flame hole 26.
Then, the portion of the exhaust pipe 7 facing this gas flame is heated and melted. During this melting, if only the exhaust head 30 is moved in the opposite direction to the direction of arrow A, the exhaust pipe 7 will extend at the melting point, and at this time the molten glass will be squeezed and closed, so the exhaust pipe 7 will remain at this position. It will be sealed.

Therefore, with such a device, the sealing work and the exhausting work can be performed continuously with one device, resulting in extremely high work efficiency.

Moreover, a chipping burner 2 is installed inside the sealing burner 11.
4 are integrally incorporated, the other burners 24, 11 do not get in the way when each of these burners 11, 24 is used, respectively.

Also, the lead wires 5, 5 are attached to the mount holder 1.
Since the lead wires pass through the lead wire insertion holes 15, 15 formed in 4, they are not burned by the sealing burner 11, and are less affected by this heat when using the chipping burner 24, thereby preventing thermal deterioration such as oxidation. Moreover, there is no need for troublesome efforts such as bending the lead wires 5, 5 separately in the sealing process and the sealing cutting process.

Furthermore, since the butting plate 18 presses the contact portion between the valve 1 and the flare portion 4 during the sealing process, reliable welding and sealing can be achieved.

In the above embodiment, since the flame hole 12 of the sealed burner 13 is formed to be inclined from the outside toward the front and inside, the contact portion between the bulb 1 and the flare portion 4 is A gas flame can be ejected from the outside to the inside. In other words, since the batting plate 18, mount holder 14, and chipping burner 24 are present inside the sealed burner 13, the sealed burner 13 has to have a large diameter. Even if the diameter of the opening end of the bulb 1 is small, for example, 30 mm or less, the abutting portion between the bulb 1 and the flare portion 4 can be reliably heated and melted.

Moreover, the gas flame injected from the flame hole 13 has a large heating rate on the flare portion 4, thereby making it possible to securely seal the gas flame.

Note that the base body 10 and the exhaust head 30 as shown in FIGS. 1 to 3 are attached to, for example, a rotating shaft 50 as schematically shown in FIG. 4 at a distance along the axial direction. a pair of spiders 50a,
48 near the periphery of 50b (50b side omitted)
The valve 1 and stem 2, which are mounted in pairs at equal intervals and held horizontally between the spiders 50a and 50b, are aligned with the arrow Y of the spiders 50a and 50b.
By continuous or intermittent rotation in the direction
Sealing valve 1 and stem 2, exhausting inside the valve,
Performs gas cleaning, flushing the filament, filling with mercury and gas, and sealing and cutting the exhaust pipe. More specifically, for example, the spiders 50a, 50b
At position 101, the stem 2 is supplied from a stem supply device (not shown) to the base body 10 and the exhaust head 30, and at position 102, the stem 2 is supplied to the valve supply conveyor 5.
The valve 1 is supplied from 2 to the valve boulder (not shown), the position of the valve 1 and the stem 2 is controlled at the position 103, and the sealing burner 11 is ignited between the positions 105 and 122. will be held. Further, between positions 123 and 141, exhausting of the valve 1 through the exhaust pipe 7, gas cleaning, flushing, and filling of mercury and inert gas are performed, and at positions 142 and 143, sealing and cutting work of the exhaust pipe 7 is performed, The evacuated valve 1 is taken out at position 144 and transported to the capping process by a conveyor 53 or the like.

Note that the supply of combustion gases such as oxygen and air for sealing and sealing, exhaust gas inside the valve, and supply of inert gas are performed through the center valve etc. as in a normal device.

Further, at position 145, the separated exhaust pipe 7 left in the exhaust head 30 after the seal is cut is removed.

Therefore, according to such a device, valve 1
The steps of sealing and exhausting the exhaust pipe 7 and cutting the seal of the exhaust pipe 7 can be performed continuously with one device.
Work efficiency is greatly improved. Additionally, the equipment becomes more compact, leading to cost reductions.
In particular, since each of the above processes can be performed continuously without transferring valves or mounts, the equipment is significantly simplified, and space within the factory can be used more effectively, as well as reducing the time required for transfer and transportation. And the simplification of equipment will greatly contribute to improving manufacturing efficiency.

It should be noted that the present invention is not limited to the manufacture of fluorescent lamps, but can also be applied to lamps equipped with mounts having the above-described configuration, such as spherical incandescent light bulbs.

〔Effect of the invention〕

As explained above, according to the present invention, even if the sealed burner becomes large due to the presence of the mount holder and chipping burner inside the sealed burner, the flame holes are directed diagonally inward, so that even if the sealed burner is large in size, Even at the sealed end of the valve, the stem can be reliably heated and melted. Moreover, since such a flame hole heats the flared portion of the stem to a high temperature, reliable sealing is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line - in FIG.
FIG. 3 is a view taken from the direction of the arrow in FIG. 2, and FIG. 4 is an explanatory diagram of a manufacturing device equipped with a plurality of sets of devices of the present invention. 1... Valve, 2... Mount, 4... Flare section, 5, 5... Lead wire, 7... Exhaust pipe, 10...
... Base body, 11 ... Sealing burner, 14 ... Mount holder, 15, 15 ... Lead wire insertion hole, 18
... Batting plate, 24 ... Chipping burner, 26 ... Flame hole, 30 ... Exhaust head, 31 ...
...Tightening rubber.

Claims (1)

[Claims] 1. A mount holder that holds a stem and has a lead wire insertion hole through which a lead wire led out from the stem is passed, and a mount holder that is provided coaxially within the mount holder and projects from the stem. A chipping burner that allows the exhaust pipe to pass through freely and has a flame hole opened on the inside facing the outer peripheral surface of the exhaust pipe, and a chipping burner that is provided on the outside of the mount holder coaxially with the mount holder and that connects the peripheral edge of the stem and the tube valve. a sealing burner having a flame hole directed toward the abutting portion with the opening edge and heating and melting these abutting portions; What is claimed is: 1. A tube device comprising: an exhaust head for feeding a filler into the valve through an exhaust pipe; and a flame hole of the sealed burner is formed to be inclined toward the front and inside. 2. Claim 1, characterized in that a butting plate is provided coaxially on the outside of the mount holder and presses the heated and fused portion of the valve and stem by reciprocating in the axial direction.
The tube manufacturing device described in Section 1.