JPH01195635A - Exhausting machine for tubular bulb - Google Patents

Abstract

PURPOSE:To improve the working efficiency and obtain high vacuum, high quality and high efficiency by transferring a heating device and a chipping device provided on a rotary bed in sequence to exhaust heads arranged on a fixed bed as the rotary bed is rotated around the fixed bed. CONSTITUTION:A rotary bed 4 is provided with a circular gear, a driving gear is engaged on the inner face of the circular gear, this driving gear is continuously rotated or intermittently rotated by a motor fixed on a basement. The heating device 24 and the chipping device 29 provided on this rotary bed 4 are transferred in sequence to exhaust heads 8a...8h arranged on the fixed bed 3 as this rotary bed 4 is rotated around the fixed bed 3. High-vacuum drawing is thereby allowed, no oil steam infiltrates into a tubular bulb, thus the quality is improved. High-vacuum drawing can be continuously performed with no interruption, and the efficiency of the vacuum drawing work is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Application Field) The present invention relates to an evacuation machine for bulbs such as incandescent lamps, discharge lamps, etc.

(Prior art) In general, incandescent bulbs, discharge lamps, and other bulbs, regardless of the type of light emitted, electrodes and incandescent bodies are sealed inside the bulb, and then the inside of the bulb is evacuated and purified. Afterwards, a rare gas is sealed inside and the seal is cut.

Such a process is called an evacuation process, and has conventionally been automatically performed using a machine exclusively for evacuation.

A conventional exhaust machine has a swivel table in the center, and a plurality of exhaust heads that rotate together with the swivel table are arranged at intervals around the swivel table. The tube was airtightly chucked and connected to the vacuum and gas filling piping installed on the swivel table.

A heating device and a chipping device are fixed around the swivel table, and when the exhaust head rotates as the swivel table rotates, the tube valves attached to these exhaust heads are heated one after another. equipment and chipping equipment.

Further, a center valve is attached to the swivel table. That is, the center valve is composed of an upper center valve that rotates together with the swivel table and a lower center valve that does not rotate with respect to the upper center valve, and the upper center valve is connected to the exhaust head. A hole is formed that communicates with the evacuation and filling gas supply piping, and the lower center valve is also formed with holes, slits, etc. that are connected to the vacuum pump and the filling gas supply cylinder. When the rotating base and the upper center valve rotate, the hole in the upper center valve communicates with the hole or slit in the lower center valve, so that the exhaust head is connected to the vacuum pump or the sealed gas supply cylinder.

Therefore, when the tube valve attached to the exhaust head is transferred to the heating device, the inside of the valve is evacuated, and after this evacuation, the sealed gas is supplied into the valve, and then when the valve is transferred to the chipping device, υ It was designed to seal off the trachea.

(Problem to be Solved by the Invention) However, an exhaust machine having a structure in which the exhaust head is rotated using a center valve as described above requires an airtight seal between the sliding surfaces of the upper center valve and the lower center valve in the center valve. Since this is done using an oil film, leaks may occur if the sliding surface runs out of oil or foreign matter enters. For this reason, there are restrictions such as not being able to draw a high vacuum.

Further, the oil film of the airtight seal evaporates, and this oil vapor enters the inside of the bulb valve, resulting in a decrease in quality.

Furthermore, when the swivel table is moved intermittently, the connection between the vacuum pump and the exhaust head is broken, which interrupts evacuation, making it impossible to perform high-speed exhaust, resulting in problems such as low work efficiency.

The present invention seeks to provide an evacuation machine capable of high vacuum, high quality, and high efficiency.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a fixed base and a rotating base that rotates continuously or intermittently around the fixed base, and a plurality of exhaust heads around the fixed base. These exhaust heads airtightly chuck the exhaust pipe of the tube valve and are switchably connected to the vacuum system piping and the sealed gas supply system piping installed on this fixed stand. and a heating device and a chipping device are provided on the swivel base at intervals in the circumferential direction of the swivel base, and as the swivel base is rotated around the fixed base, It is characterized in that the heating device and the chipping device are sequentially transferred to the exhaust head of the fixed table.

(Function) According to the present invention, there is provided a fixed base and a swivel base that is rotated continuously or intermittently around the fixed base, and as the swivel base is rotated around the fixed base, the swivel base is provided with a Since the heating device and chipping device are sequentially transferred to the exhaust head placed on the fixed stand, it is possible to eliminate the use of a conventional center valve, and thus to reduce leakage caused by the use of a center valve. It is possible to eliminate problems such as the occurrence of oil vapor and the intrusion of oil vapor into the tube valve, resulting in quality deterioration and work efficiency deterioration.

(Example) The present invention will be described below based on an example shown in the drawings.

In the figure, 1 is a base, and on this base l is a support Yj
j units 2 are provided.

A fixed base 3 is installed in the center of the support base 2, and
The fixed base 3 is provided with a swivel base 4 that can freely rotate within a horizontal plane.

The swivel base 4 includes a ring gear 5, and a drive gear 6 meshes with the inner surface of the ring gear 5. The drive gear 6 is rotated continuously or intermittently by a motor 7 fixed on the base 1. ing. Therefore, the swivel table 4 can be rotated continuously or intermittently around the fixed table 3 as shown by the arrows in FIG.

” 1. The fixed base 3 has a plurality of exhaust heads 8 around it.
are arranged at equal intervals in the circumferential direction. In this embodiment, eight heads are used, and in FIG. 1, they are indicated by 8a to 8h in the counterclockwise direction. These exhaust heads 8 are equipped with a chuck means (not shown) for airtightly chucking the exhaust pipe 41 of the tube valve 40.

Further, a low vacuum pump 9 is mounted on the fixed table 3, and a low vacuum manifold 10 is mounted on this low vacuum pump 9.
are connected to each other, and the low vacuum manifold (20) is connected to the exhaust head 8... via electromagnetic valves 11... and low vacuum system piping 12..., respectively.

Further, a high vacuum pump 13 is mounted on the fixed table 3, and this high vacuum pump 13 is connected to the high vacuum manifold 1.
Connected to 4. This high vacuum manifold 14 includes a solenoid valve 15 and a high vacuum system piping 16.
. . and is connected to the exhaust head 8 .

Furthermore, a gas cylinder 17 filled with a sealed gas such as argon is installed outside the base 1, and this gas cylinder 17 is connected to a gas supply manifold 19 via a supply pipe 18. This gas supply manifold 19
are connected to the exhaust head 8 through a solenoid valve 20 and a sealed gas supply pipe 21, respectively.

On the other hand, the swivel table 4 is provided with processing devices necessary for exhaust gas at intervals in the circumferential direction of the swivel table 4. In the case of this embodiment, the processing device rotates around the rotating base 4 in one direction.
A loading device 23 that supplies the tube bulb 40 to the exhaust head 8... and first to fourth heating devices 24, 25 that heat the tube bulb 40 supported by the exhaust head 8.
．． 20.27, an empty position 28 for supplying sealed gas to the tube valve 40 supported by the exhaust head 8, a chipping device 29 consisting of a gas burner, etc. for sealing and cutting the exhaust pipe 41, and a tipping device 29 that is connected to the exhaust head after the exhaust is finished. 8 and an exhaust pipe removal position 30 for discharging the remaining exhaust pipe 41.

These processing devices 23 to 30 each have an exhaust head 8.
It corresponds to the tube bulb 40 supported by...

The operation of the exhaust machine having such a configuration will be explained.

The arc tube bulb 4o of the discharge lamp with electrodes sealed in advance is supplied to each of the exhaust heads 8a to 8h by the loading device 23 as the swivel base 4 rotates clockwise.

As the swivel table 4 rotates, the arc tube bulbs 40 supported by the respective exhaust heads 8 are subjected to exhaust processing.

This will be explained in more detail by taking as an example the case of the arc tube bulb 40 supported by the exhaust head 8a.

When the arc tube valve 40 is attached to the exhaust head 8a, the solenoid valve 11 of the low vacuum system piping 12 connected to this exhaust head 8a is opened, so that the exhaust head 8a generates a low vacuum via the low vacuum manifold IO. It is connected to the pump 9, and therefore low evacuation of the arc tube bulb 40 is started.

Next, as the swivel base 4 rotates in the direction of the arrow, the first heating device 24 is opposed to the exhaust head 8a and heats the arc tube bulb 40 supported by the exhaust head 8a.

When the first heating device 24 starts heating the arc tube bulb 40 of the exhaust head 8a, the solenoid valve 11 of the low vacuum system piping 12 closes, and the high vacuum system piping 1 replaces this.
6 solenoid valve 15 is opened, thus arc tube valve 40
is the high vacuum pump 13 via the high vacuum manifold 14.
Since it is connected to , high vacuuming starts.

While continuing this high vacuum, the swivel table 4 is rotated in the direction of the arrow, and the second heating device 25, third heating device 26, and fourth heating device 27 are successively opposed to the exhaust head 8a. The arc tube bulbs 40 supported by the exhaust head 8a are sequentially heated.

By such heating and evacuation, impurities adsorbed on the glass and electrodes of the arc tube bulb 40 are released and drawn out of the bulb, resulting in a so-called degassing process. Such a degassing process is performed sequentially by the second heating device 25, the third heating device 26, and the fourth heating device 27, so that when the fourth heating device 27 is finished, the inside of the valve 4o is Maintained at high vacuum.

Next, as the swivel base 4 rotates in the direction of the arrow, the vacant position 28 for supplying the sealed gas faces the exhaust gas Rad 8a. At this time, the solenoid valve 15 of the high vacuum system piping 16 is closed, and the solenoid valve 2 of the sealed gas supply piping 21 is closed instead.
Since the arc tube bulb 40 is connected to the gas cylinder 17, a gas such as argon is supplied from the gas cylinder 17.

When a predetermined amount of sealed gas is supplied into the arc tube bulb 40, the chipping device 2 rotates as the swivel base 4 rotates in the direction of the arrow.
9 faces the exhaust head 8a. At this time, the solenoid valve 2o of the sealed gas supply pipe 21 is closed, and the chipping device 2
The exhaust pipe 41 is sealed and cut using a gas burner 9.

As a result, the valve 4o is sealed and falls from the exhaust head 8a, and is removed by an unloading device (not shown).
give it to

In this case, the exhaust pipe 41 remains in the exhaust head 8a, and is removed when the exhaust pipe removal position 30 faces the exhaust head 8a as the swivel base 4 rotates in the direction of the arrow.

According to this embodiment, the exhaust heads 8a to 8h, which are connected to the evacuation system and the sealed gas supply system through piping, are fixed to the fixed base 3, and the loading devices 23 and the first to first 4 heating device 24.25.
26.27, empty position 28 for supplying filler gas,
Since the chipping device 29 and the exhaust pipe removal position 30 are provided on the swivel base 4, there is no need to connect the exhaust heads 8a to 8h to the evacuation system and the sealed gas supply system through a center valve.

Therefore, the occurrence of leaks caused by the use of the center valve is eliminated, and since it is possible to evacuate at a high degree of vacuum, there are no residual impurities in the valve, and there is no possibility of oil vapor entering the tube valve, improving quality. improves.

Further, the high vacuum operation can be continued regardless of the rotational movement of the swivel table 4, and the high vacuum operation can be performed quickly, improving work efficiency.

Note that the present invention is not limited to use for exhausting discharge lamps, but can also be implemented for exhausting incandescent light bulbs, etc., and the exhaust schedule is not limited to the above example, and inert gas may be added during the process. A cleaning step may also be provided.

Further, the exhaust treatment device may include not only a heating device and a chipping device, but also a device for charging mercury or a luminescent substance, a halogen encapsulation device, a flushing device, an aging device, and the like.

Furthermore, in the present invention, the swivel base installed around the fixed base is not limited to being in the same plane as the fixed base, but may have a coaxial relationship with the fixed base. For example, there may be a vertical positional shift as shown in the drawings.

[Effects of the Invention] As explained above, the present invention includes a fixed base and a rotating base that rotates continuously or intermittently around the fixed base, and the rotating base rotates the roller of the fixed base. Additionally, since the heating device and chipping device provided on the rotating table are sequentially transferred to the exhaust head placed on the fixed table, it is possible to eliminate the use of a conventional center valve. Therefore, the occurrence of leaks due to the use of a center valve can be eliminated, high vacuum can be achieved, and oil vapor does not enter the tube valve, resulting in improved quality. Furthermore, since high vacuuming can be performed continuously without interruption, the efficiency of vacuuming work is improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a plan view and FIG.
The figure is a view taken along the line ■-■ in FIG. ■...Base, 3...Fixed base, 4...Swivel base, 7...
...Motor, 8a-8h...Exhaust head, 9...Low vacuum pump, 13...High vacuum pump, 17...Gas cylinder, 10.14° 19...Manifold, 11.1
5.20...Solenoid valve, 12.10゜21...Piping,
23...Loading device, 24.25.28°27
...Heating device, 29...Tipping device, 4o...
・Valve, 41...exhaust pipe. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A fixed base and a swivel base that rotates continuously or intermittently around the fixed base are provided, and a plurality of exhaust heads are arranged at intervals around the fixed base, and these exhaust heads are used for the exhaust of the tube valve. It chucks the tube airtight and is switchably connected to the vacuum system piping and the sealed gas supply system piping installed on this fixed base, and the above-mentioned swivel base is provided with an interval in the circumferential direction of the swivel base. and a heating device and a chipping device are provided at the swivel base, and as the swivel base is rotated around the fixed base, the heating device and the chipping device provided on the swivel base are sequentially transferred to the exhaust head of the fixed base. A tube exhaust machine characterized by: