JPH0340337A - Manufacture of discharge lamp with high pressure metal vapor - Google Patents

Abstract

PURPOSE:To eliminate intrusion of moisture into a sealed vessel by inserting only the end of an exhaust pipe into the sealed vessel filled with inert gas and put in the pressurized condition, thereby performing the feed of additives into the exhaust pipe, and thus refraining from opening and closing of the door of the sealed vessel. CONSTITUTION:Additive 7 of metal halide and an opening jig 11 are stored in a sealed vessel 6, which is filled with inert gas and put in pressurized condition. One end of an exhaust pipe 5 is connected with the tip pipe 4 of a light emitting tube 1, and the plug is removed from the vessel 6 insert hole 10, into which the branch 5b of the exhaust pipe 5 is inserted approx. 50mm deep, and the exhaust pipe 5 is fixed with a fixture at the insert hole 10. By the use of the opening jig 11 in the form of forceps, a vessel 13 containing the additive 7 is taken up with a hand fitted with a glove 12 and supplied into the exhaust pipe 5. Using a permanent magnet 9, this vessel 13 supported by the opening jig 11 is received and led to the branch 5a of exhaust pipe 5, which is then drawn off from the sealed vessel 6. This shall be followed by exhaustion of the light emitting tube 1 and additive 7 encapsulation in it.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a high-pressure metal vapor discharge lamp, and particularly to an improvement in a method for sealing an additive metal halide into an arc tube.

[Conventional technology]

FIG. 4 is an explanatory diagram showing an arc tube of a high-pressure metal vapor discharge lamp. Electrodes 2 are installed at both ends of the arc tube 1 made of quartz glass or the like.
is provided, and a molybdenum metal foil 3 is connected to the electrode 2. 4b is a tip-off section from which the tip tube 4 is removed. Fig. 5 is an explanatory diagram of the shape of the arc tube 1 in the middle of the process, and 4 is a chip tube for evacuating the inside of the arc tube and adding additives such as metal halides (hereinafter referred to as halides) inside the arc tube. It is necessary to introduce Generally, methods for encapsulating halides include, for example, Utility Model Publication No. 48-14951.
As shown in the publication, a method is used in which a halide is weighed in advance into a glass container or a metal container, and the halide is fed under pressure by the gas pressure of an exhaust machine or introduced by tilting the arc tube 1 using a rotary manifold. ing. However, the above method has a problem in that the weighed amount of additives such as halides remains in the manifold or part of the exhaust system. Is this a high-pressure metal vapor discharge lamp for that purpose? There was a drawback that 1 was not fully satisfied.

Next, a conventional method devised to improve the drawbacks of the above method will be explained with reference to FIGS. 6 and 7. In FIG. 6, an exhaust pipe 5 having a branch part 5b made of quartz or the like is connected to a chip tube 4 integrated with the arc tube 1, and a metal halide filler 7 is stored in the branch part 5b. In this method, the liquid is allowed to drip into the arc tube 1 through the exhaust pipe 5.

FIG. 7 is an explanatory diagram of the sealed container 6 used in this method, in which the halide 7 as an additive sealed in the arc tube 1 is transferred into the exhaust pipe 5 connected to the arc tube l. This shows the state in which it was taken out.

That is, the exhaust pipe 5 to which the arc tube 1 is connected is housed in an airtight container 6, and within the airtight container 6, the halide 7 weighed in a metal container is poured into the exhaust pipe using the glove 12 of the airtight container 6. 15, and transferred to the branch 5b of the exhaust pipe 5 using a permanent magnet 9 or the like. Using the above method, place the exhaust pipe 5 horizontally to prevent the halide 7 from spilling into the airtight container 6.
The transfer work process is completed within. Then, open the door 8 of the airtight container 6 and take out the luminescent material with the exhaust pipe 5 attached.
After exhausting the gas using an exhaust machine not specified by the government, the additive 7 such as a halide is dropped into the arc tube 1.

(3 Problems to be Solved by the Invention) However, in the method described above, moisture is brought into the sealed container 6 each time the door 8 of the sealed container 6 is opened and closed. The object 7 absorbs moisture, which has a negative effect on the lighting start of the luminous tube 1, and if the connection tube 5 is handled many times in the closed container 6, the inside of the closed container 6 becomes extremely narrow, causing the permanent magnet to 9 was difficult to transport. Further, depending on the model, it is necessary to weigh the additive 7, and the inside of the closed container 6 needs to be used widely and effectively, and a significantly large closed container 6 has to be used. Furthermore, since the door 8 of the sealed container 6 is limited to the minimum necessary size to prevent moisture from entering, the large arc tube 1 cannot fit into the sealed container 6 and cannot be handled.

This invention solves the above-mentioned problems, improves the quality of high-pressure metal vapor discharge lamps by preventing an increase in humidity in a sealed container, and encapsulates additives in a dry state, and also improves the quality of high-pressure metal vapor discharge lamps. The object of the present invention is to provide a manufacturing method that can be used to enclose an arc tube and handle a larger arc tube than conventional ones.

[Means to solve the problem]

Therefore, in the method for manufacturing a high-pressure metal vapor discharge lamp according to the present invention, in the method for manufacturing a high-pressure metal vapor discharge lamp in which a metal halide is sealed as an additive in an arc tube, the additive is placed in a closed container having an insertion opening. A step of storing the exhaust pipe inside and pressurizing it by filling it with an inert gas, connecting one end of the exhaust pipe having a branch to the chip tube of the arc tube, and connecting the other end of the exhaust pipe to the airtight container. a step of inserting the additive from the insertion port; a step of supplying the additive stored in the airtight container into the exhaust pipe from the pipe end of the exhaust pipe inserted into the airtight container; and a step of feeding the additive stored in the airtight container into the exhaust pipe. The object is achieved by a method characterized in that it comprises the steps of transferring an object to a branch of the exhaust pipe and extracting the exhaust pipe from the closed container.

[Effect]

In the method described above, first, one end of the exhaust pipe having a branch is connected to the tip tube of the arc tube.

The other end of the exhaust pipe is inserted into a pressurized airtight container filled with an inert gas, and the metal halide additive in the airtight container is inserted into the airtight container. It is fed into the exhaust pipe from the end.

Next, the additive supplied into the exhaust pipe is transferred to a branch of the exhaust pipe, and the exhaust pipe is extracted from the closed container.

In other words, the process of supplying additives and transferring them to the branches is performed by inserting only the end of the exhaust pipe into a pressurized airtight container filled with inert gas, and since the airtight container is not opened or closed, moisture The product does not enter sealed containers, luminous tubes, or exhaust pipes, thereby preventing the occurrence of defective products. Further, since there is no need to house the entire discharge lamp to which the exhaust pipe is connected in a sealed container, the work is easy, and it is also possible to handle large arc tubes.

〔Example〕

The method for manufacturing a high-pressure metal vapor discharge lamp according to the present invention will be explained below with reference to Examples.

FIG. 1 is an explanatory diagram of a method of manufacturing a high-pressure metal vapor discharge lamp, which is an embodiment of the present invention. Explaining the configuration,
A sealed container glove 12 is provided in front of the sealed container 6, and
A cylindrical insertion port 10 into which the exhaust pipe 5 is inserted is provided on the side surface, and is inserted diagonally, for example, into the side surface of the closed container 6 so that the metal halide additive 7 can be easily accommodated in the branch portion 5b of the exhaust pipe 5. It is installed at an angle of 40 to 50 degrees. This insertion port 10 has a fastener so that it can be attached to the surface of the exhaust pipe 5 while maintaining airtightness. The figure shows a state in which the exhaust pipe 5 connected to the chip tube 4 of the arc tube 1 is inserted into the closed container 6 through the insertion port 10, and the additive 7 is transferred to the branch portion 5b of the exhaust pipe 5.

The manufacturing method of the example will be explained below.

First, the metal halide additive 7 and the opening jig 11 are stored inside the sealed container 6, and the container is filled with an inert gas to be pressurized.

Next, prepare one or more arc tubes 1 with one end of the exhaust pipe 5 connected to the chip tube 4 of the arc tube l, and
At this time, the closed container 6 is in a pressurized state filled with inert gas, and the inert gas is blown to the outside.

Next, insert approximately 50III11 of the exhaust pipe 5 from the insertion port 10 with the branch 5b facing downward, and then insert the exhaust pipe 5 into the insertion port! Fix the exhaust pipe 5 by turning the fastener 0. In order to transfer the metal halide additive 7 weighed in the closed container 6 to the branch 5b of the exhaust pipe 5, the glove 12 of the closed container 6 is put on the hand. Using one arm, for example, the left hand wearing a glove 12, using a bottle set-like opening jig 11, open the container 13 containing the additive 7 inside the closed container 6, as shown in FIG. Exhaust pipe 5 was picked up and inserted with its surface widened.
is supplied into the exhaust pipe 5 from the pipe end. Next, from the outside, one arm, in this case the right hand, uses the permanent magnet 9 to take over the container 13 containing the additive 7 supported by the opening jig 11 and guide it to the branch 5b of the exhaust pipe 5. 7 is completed, and the exhaust pipe 5 is removed from the closed container 6. Then, the emitted light trlfl is evacuated and the additive γ is filled into the arc tube.

FIG. 3 is a comparative diagram showing changes in the dew point in a particular sealed container 6 in which 100 arc tubes were processed using the above method. In the conventional method, the humidity inside the closed container increases, whereas in the method according to the present invention, no change in dew point is observed.

When 50 5c-Na-based high-pressure metal vapor discharge lamps and metal halide lamps containing additives were produced using the method of this invention and the conventional method, 3 lamps were produced using the conventional method.
0 had a problem with starting, but this invention has a problem.
None of the lamps produced by the method of the example had starting failures.

(Effects of the Invention) As explained above, according to the present invention, the process of supplying additives to the exhaust pipe and transferring them to the exhaust pipe engineering department is carried out in a closed container filled with inert gas and pressurized. This is done by inserting only the end of the exhaust pipe, and the door of the sealed container is not opened or closed, so moisture does not enter the sealed container, luminous tube, or exhaust pipe, and by sealing the additive in a dry state, high pressure The quality of metal vapor discharge lamps can be improved.

In addition, there is no need to house the entire discharge lamp with the exhaust pipe connected in a sealed container, making the work easier.Also, since a large number of discharge lamps can be continuously worked on, there is no need to store additives in the exhaust pipe. It is possible to efficiently supply and transport gas, and also handle large arc tubes.

It is possible to provide a method for manufacturing a high-pressure metal vapor discharge lamp having the above effects.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a method for manufacturing a high-pressure metal vapor discharge lamp which is an embodiment of the present invention, Fig. 2 is an explanatory diagram of supplying metal halide to an exhaust pipe, and Fig. 3 is a diagram showing changes in the dew point of a closed container. Figure 4 is an explanatory diagram of the arc tube of a high-pressure metal vapor discharge lamp, Figure 5 is an explanatory diagram of the process of manufacturing the arc tube of a high-pressure metal vapor discharge lamp, and Figure 6 is an illustration of the process of attaching an exhaust pipe to the arc tube. The connected explanatory diagram, FIG. 7, is an explanatory diagram of a closed container used in the conventional manufacturing method. 1 is an arc tube, 4 is a chip tube, 5 is an exhaust pipe, 5b is a branch of the exhaust pipe, 6 is a sealed container, 7 is a metal halide which is an additive, 8 is a door, 9 is a permanent magnet, 10 is an insertion 11 is an opening jig, 12 is a sealed container glove, and 13 is a container containing additives. In addition, in FIG. 1, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In a method of manufacturing a high-pressure metal vapor discharge lamp in which a metal halide is sealed as an additive in an arc tube, the additive is stored inside a sealed container having an insertion port, and the container is filled with an inert gas and brought into a pressurized state. a step of connecting one end of an exhaust pipe having a branch to a chip tube of an arc tube, and inserting the other end of the exhaust pipe into the sealed container through the insertion port; and a step of storing the exhaust pipe in the sealed container. a step of supplying the additive into the exhaust pipe from the end of the exhaust pipe inserted into the closed container; transferring the additive supplied into the exhaust pipe to a branch of the exhaust pipe; A method for producing a high-pressure metal vapor discharge lamp, comprising the steps of extracting it from a sealed container.