JPS63114045A - Positioning of valve and filament - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of aligning a bulb and a filament.

Conventional technology In general, in the manufacture of halogen light bulbs, etc., before sealing the end of a tubular bulb, a mount with an external lead wire connected to the end of the filament via metal foil is inserted and held inside the tubular bulb, and the center of the filament is Adjustments are made so that the center axis of the valve is located on the axis. If this adjustment is not made, and the valve is set at an angle, the valve end will shrink in the diametrical direction due to heating at the end of the valve during sealing, causing the inner surface of the valve to come into contact with the metal foil or external lead wire. It may also be fused. These may cause leaks or cracks in the sealed portion.

Conventionally, alignment between the central axis of the bulb and the central axis of the filament has been performed using a jig as shown in FIG. That is, in FIG. 7, the tubular valve with exhaust pipe 1 held by the valve holder 13 is adjusted in the X-ray direction by rotating the screw 14, and adjustment in the Y-axis direction is performed by rotating the screw 15. Ta.

In addition, in FIG. 7, 2 is an exhaust pipe, and 7 is a cap fitted into the upper opening of the valve 1.

Problems to be Solved by the Invention However, such conventional methods not only require a relatively long time for adjustment, but also have the problem that if the valve is set at an angle, it is impossible to correct it. There was a point.

Alternatively, when aligning the exhaust pipe by holding it, problems will occur if the angle θ between valve 1 and exhaust pipe 2 is always 90° as shown in Figure 8. However, there are cases where θ is not set at 90° or deviates.
Particularly in the case of long bulbs, the central axis of the bulb and the central axis of the filament may deviate by a maximum of 2 to 31 degrees.

With conventional methods, it has been impossible to correct the deviation in such cases.

The present invention was made to solve these problems, and it is possible to align the bulb and filament in a short time, and even if the bulb is set at an angle, it can be corrected and aligned. The present invention provides a method for aligning the bulb and filament that allows for the alignment of the bulb and filament.

Means for Solving the Problems In order to solve these problems, the method of aligning the valve and the filament of the present invention involves aligning the end of the exhaust pipe of a tubular valve with an exhaust pipe into which a filament is inserted. The central axis of the bulb is positioned on the central axis of the filament by heating and softening the exhaust pipe with a burner while holding the valve, and holding the bulb between a pair of holders.

Even if the operating valve is set at an angle, when the valve is held between the holders, the exhaust pipe is heated and softened by the burner, so the valve can move and be straightened. As a result, the central axis of the bulb and the central axis of the filament can be aligned.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings, taking the case of a double-capped halogen light bulb as an example.

1A and 1B are plan views for explaining the steps of the method of the present invention, and FIG. 2 is a front view showing a state in which the exhaust pipe is held.

In FIGS. 1A and 1H, 1 is a tubular glass bulb, 2 is an exhaust pipe welded to the bulb 1, 3 is a filament inserted into the bulb 1, 4 is an exhaust pipe holder, and 5 is the exhaust pipe 2. The burner 6 installed nearby is installed near the exhaust pipe 2 and a little further away.

The cooling air nozzle 7 is a pair of valve holders that can be opened and closed, and the inside of the tip has a V-shape. lI8 is formed. The armature 8 may be semicircular.

In FIG. 2, reference numeral 9 denotes a cap fitted into the upper opening of the valve 1, which holds the upper external lead wire. Reference numeral 10 denotes a mount pin having a structure that can be divided into two in the axial direction, and has a small hole, into which a lower external lead wire is inserted to hold it.

In FIG. 2, 11 is a connecting pipe and 12 is a center valve. Next, the operation of such a device will be explained.

The end of the exhaust pipe 2 of the valve 1 with the filament 3 inserted inside is held by the exhaust pipe holder 4, and the exhaust pipe 2 is locally heated and softened with a burner 5 (see Figure 3) that emits a thin, sharp flame. (Figure 1A). When a part of the exhaust pipe 2 has softened slightly, the burner is moved away from the exhaust pipe 25 to stop heating the exhaust pipe 2 by the burner 5, and the V-shaped groove 8 of the pair of holders 9 is used to secure the lower end of the valve 1. At the same time, cooling air is blown from the cooling air nozzle 6 onto the heat-softened part of the exhaust pipe 2 to cool and harden the heat-softened part (FIG. 1B).

After the alignment is completed, inert gas is flowed into the valve 1 through the exhaust pipe 2 (in the direction of the arrow in Fig. 2), and the air inside the valve 1 is exhausted.While the inert gas is flowed into the valve 1, the burner The lower end of the valve is sealed by heating and softening the end of the valve with a sealing jig (not shown) and applying pressure with a sealing jig (not shown).

After that, the cap 9 is removed, the valve holder 7 is opened, the mount pin 10 is separated into two parts, and the mount pin 10 is separated and opened, and the exhaust pipe holder 4 is rotated 180 degrees around the exhaust pipe 2, thereby allowing the above-mentioned The sealing part is located on the upper side and the opening of the valve 1 is located on the lower side. The external lead wire that has come to the bottom is inserted into the small hole of the mount pin 10. After that, the bulb 1 and the filament 3 are aligned in the same manner as above, and the lower end of the bulb 1 is sealed in the same manner, and the two are assembled in the usual manner as shown in FIG. Obtain a base-shaped halogen light bulb.

If the angle θ between the central axis of the valve 1 and the central axis of the exhaust pipe 2 is not 90°, then if the end of the exhaust pipe 2 is held with the exhaust pipe holder 4, the central axis of the valve 1 will be It has a slight angle with respect to the vertical axis, in other words the central axis of the filament 3, ie the bulb 10 is set at an angle.

According to the method of the present invention, even in such a case, the exhaust pipe 2 is heated and softened and the valve 1 is held between the pair of holders 9, so that the valve 1 can move during the holding, and therefore the valve The central axis of filament 1 and the central axis of filament 3 can be aligned without fail.

According to experiments, the production speed of the method of the present invention is approximately 4 times higher than that of the conventional method, and the incidence of defective products is approximately 1/3
It was confirmed that there was a decrease in

In the above embodiments, the case of a double-cap type halogen light bulb has been described, but the present invention can of course be practiced in the case of a single-cap type halogen light bulb as shown in FIG. In this case, the exhaust pipe-equipped valve 1 shown in FIG. 6 is used, and the exhaust pipe holder is installed at a location rotated 90° counterclockwise from the positions shown in FIGS. 1A and 1B. In other words, it is located directly above the exhaust pipe.

Furthermore, it goes without saying that the present invention can also be implemented with single-cap or double-cap infrared light bulbs.

As described in detail, according to the method of the present invention, the alignment between the bulb and the filament can be automatically performed in a short time, and even a bulb that is set at an angle can be corrected. This has the excellent effect of always being able to align the positions.

[Brief explanation of the drawing]

1A and 1B are plan views for explaining the steps of the method of the present invention, FIG. 2 is a front view showing a state in which the exhaust pipe is held, FIG. 3 is a side view showing an example of the burner, and FIG. The figure is a front view of a double-cap type halogen light bulb, Figure 5 is a front view of a single-cap type halogen light bulb, Figure 6 is a front view of a single-cap type halogen bulb before processing, and Figure 7 is a front view of a conventional method. FIG. 8 is a plan view of a jig for carrying out the process, and is a diagram for explaining the angle formed between the valve and the exhaust pipe. 1... Tubular valve 2... Exhaust pipe 3... Filament 4... Exhaust pipe holder 5... Burner
6... Cooling air nozzle 7... Valve holder 8... Groove 9... Cap 10... Mount pin Patent applicant CKC Corporation Matsushita Electric Industrial Co., Ltd. (5 others) 4...・Stab tracheal storage device 5°゛°burner B)
6°°° Figure 4

Claims (1)

[Claims] While holding the end of the exhaust pipe of a tubular valve with an exhaust pipe into which a filament has been inserted, the exhaust pipe is heated and softened with a burner, and the valve is held between a pair of holders to remove the filament. A method for aligning a bulb and a filament, the method comprising positioning the central axis of the bulb on the central axis of the filament.