JPS6237868A - Automatic selector for incandescent lamp - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic sorting device for incandescent light bulbs, and more particularly, an automatic sorting device for incandescent light bulbs that detects the condition of the gas filled in the incandescent light bulb and determines whether it is good or bad. Regarding improvements.

[Technical backstory of the invention and its problems]

Generally, defective products may be produced during the manufacturing process of incandescent light bulbs.

For example, if the exhaust gas of an incandescent light bulb is defective, the purity of the gas mainly composed of inert gas such as argon is low, or slow leakage occurs, the life of the incandescent light bulb will be shortened. The luminous flux may decrease or the retention characteristics of the luminous flux may deteriorate.

Conventionally, therefore, light bulb manufacturing factories have detected the gas state within the incandescent light bulbs and removed the above-mentioned undesirable incandescent light bulbs during the manufacturing process. In other words, high-frequency, high-voltage voltage is applied to all incandescent light bulbs manufactured to generate high-frequency discharge within the incandescent light bulbs.

An operator visually judges the color and eliminates it, thereby preventing the above-mentioned undesirable defective incandescent bulbs from being shipped to the market.

FIG. 4 shows an example of conventional sorting performed by an operator, in which a high frequency voltage from a high frequency voltage generator @1 is applied to a discharge terminal 3 via a conductor 2.

Then, a high frequency discharge is generated between the discharge terminal 3 and a metal part such as a filament (not shown) in the incandescent light bulb 4. The color of the light emitted at that time and the state of its discharge were visually observed by the operator's naked eyes 6 to determine the gas state within the incandescent bulb 4 and to determine whether it was good or bad.

However, in such a conventional example, in recent years, one of the workers
Due to the rapid increase in quality and the rapid increase in the production speed of incandescent light bulbs, it has become impossible for workers to make judgments with their naked eyes to keep up with the production speed, so attempts are being made to automate such inspections.

An example of the automatic sorting device is shown in FIG.

This is because when a discharge occurs between the discharge terminal 8 to which the high frequency voltage of the high frequency voltage generator 7 is applied and a metal part such as a filament in the incandescent light bulb 9, this light emission is transmitted to the sensor device 10.
This is determined based on the following. This sensor device 10 includes a filter 11, a photocell 12 and a metering relay 13.
Of the light spectrum during the discharge, for example, 3'60 nm to 4 transmitted by the filter 11
The 20 nm light is converted into a photocurrent by the phototube 12, and the voltage generated by passing this photocurrent through a predetermined load is supplied to the metering relay 13. The incandescent light bulbs 9 within the voltage range set in this metering relay 13 are sent to the next process 14 as good products, and the incandescent light bulbs 9 that are defective outside the above voltage range are sent to the defective product department 15 as defective products. It has become.

However, in such a conventional example, because the conditions of occurrence of discharge are different, a predetermined number of runs, for example, 360 to 420 runs, is used.
There was a problem in that it became difficult to detect the quality of the filter using a nanometer filter.

[Purpose of the invention]

-3 - The present invention has been made in view of the above circumstances, and has improved sorting ability, such as being able to reliably sort out incandescent light bulbs even when the conditions of occurrence of discharge within the incandescent light bulbs are different. The purpose of this invention is to provide an automatic sorting device for incandescent light bulbs.

[Summary of the Invention] □The present invention is characterized in that the light spectrum during discharge of an incandescent lamp differs between a good product and a defective product in a predetermined wavelength range. In the case of an incandescent light bulb, there is a noticeable level difference in the periphery of 56゛0nI11, and the intensity ratio between light in this predetermined wavelength range and light in other wavelength ranges has almost no effect even if there is a level change. It was developed with the focus on improving the ability to sort out incandescent light bulbs.

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[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. 1 shows the overall configuration of an embodiment of the present invention, which includes a discharge generator A that generates discharge in an incandescent light bulb 20, and an identification device @8.

Discharge generator A is a high voltage generator 2 that generates high voltage.
A discharge terminal 24 is electrically connected to the output terminal 22 of 1 through a conductive wire 23. The high voltage generator 1f21 is placed on the top of a column 25 that stands up on a machine bed (not shown), and the discharge terminal 24 is suspended from an arm 26 made of an insulator that extends laterally from the top of the column 25. ing.

On the other hand, the incandescent light bulb 20 is held by a holder 27 separately provided on the machine bed (not shown), and is transported to a predetermined inspection position located below the discharge terminal 24'. When the incandescent light bulb 20 is positioned at this detection position, its base 28 is brought into electrical contact with the ground plate 29 and grounded.

Further, the incandescent light bulb 20 has a glass bulb 30 filled with a mixture of, for example, 90% argon gas and 10% nitrogen gas by volume at a pressure of 82,500 pa (at 20° C.). Discharge occurs between the metal part in 30 and the discharge terminal 24.

The light spectrum emitted during this discharge is as follows:
A first optical sensor 31 placed on the side of the inspection position of
and is received by the second optical sensor 32. These first
Although the light receiving directions of the second optical sensors 31 and 32 are different from each other, they are set to receive light from the same required location within the glass bulb 30, as shown by the broken line in the figure, and are placed on a machine table (not shown), etc. Fixed. These first and second optical sensors 31 and 32 have optical filters so as to detect light in a predetermined wavelength range among the light spectrum emitted during the discharge shown in FIG.
1 detects light α in a wavelength range around 560 nm, and the second optical sensor 32 is equipped with an optical filter for detecting light β in a wavelength range around 670 nm.

Of the light spectrum emitted during discharge, the wavelength is 560
As shown in the spectral distribution diagram in Figure 2, the light α around nm is at a remarkable level between non-defective products and non-defective products that are contaminated with a large amount of impurity gas, have large leaks, or are severely defective. It shows a difference. That is, when the incandescent bulb 20 is a good product, the light output of the light α is relatively large, but as the bulb becomes defective, it gradually decreases, and when the incandescent bulb 20 becomes defective, it shows the minimum output. . Therefore, from now on α
It is also possible to sort out whether the incandescent light bulb 20 is good or bad by detecting only the incandescent light bulb 20, but if the incandescent light bulb 20 deviates from a predetermined inspection position, the level will fluctuate and accurate sorting cannot be performed.

On the other hand, the optical output of β light with a wavelength around 670 nm is almost constant regardless of whether the incandescent bulb 20 is a good product, a defective product, or a low-quality product, and is at almost the same level as the optical output of α waves shown in the case of a non-defective product. reach

Therefore, the value of the light intensity ratio α/β between α and β becomes a parameter for identifying the quality of the incandescent light bulb 20, and moreover,
If the incandescent light bulb 20 deviates from a predetermined inspection position and a level change occurs in both the light α and β, the fluctuation will be equal to α/β.

Since it acts almost equally on β, α/β is almost constant.

Therefore, the first and second optical sensors 31 and 32 are connected to a computer 34 as an identification device via an interface 33, and the computer 34 calculates the intensity ratio α/of the α light and β light.
In addition to calculating β, the quality of the incandescent light bulb 20 is determined based on the intensity ratio α/β. computer 3
4 is a well-known computer that displays the results of identifying whether the incandescent light bulb 20 is good or bad on the screen of the CR7 display device 35;
If the product is determined to be defective, a rejection signal is given to a rejection device (not shown) to eliminate the defective product from the inspection line, and the data is stored in the storage section.

The results of selecting the quality of the incandescent light bulb 20 according to this embodiment are shown in the frequency distribution diagram of FIG. Figure 3 shows the results of sorting 20 incandescent light bulbs based on α/β, including 150 inferior quality products, 140 aged quality products, and 450 non-defective products, and most of the non-defective products were found in areas with large α/β values. The graph shows that the α/β values are distributed in areas with smaller α/β values as the products become older and in good condition. In other words, it is shown that the quality of the incandescent light bulb 20 can be determined stably and accurately based on the α/β value.

Furthermore, in this embodiment, the intensity ratio α/β of α light in a predetermined wavelength range and β light in other wavelength ranges in the light spectrum during discharge is determined, so if the incandescent light bulb 20 is located at a predetermined detection position J. : Even if the discharge generation situation is different due to deviation, and the levels of the lights α and β in both wavelength ranges vary, the intensity ratio α/β of both lights α and β remains almost constant. The ability to sort out pass/fail is improved. For example, in the conventional example shown in FIG. 5, the pass/fail screening ability was about 70% due to its problems, whereas the present embodiment has a pass/fail screening ability of about 96% or more.

Note that in the above embodiment, the first and second optical sensors 31 and 32 individually detect α light and β light, but the present invention is not limited to this, and for example, a single optical sensor may be used. Both spectra of α light and β light may be detected simultaneously.

Further, although the light β is set to light around 670 nm, the present invention is not limited to this, and any light in a convenient wavelength range may be used when comparing the intensity with the light α.

Furthermore, although the computer 34 is used as the identification device, it is of course not necessary to use a computer as long as it has the function of calculating the α/β value and the function of identifying the quality of the incandescent light bulb based on the α/β value. be.

〔Effect of the invention〕

As explained above, the present invention includes a discharge generating device that applies a high voltage to an incandescent bulb to generate a discharge, and an output that varies according to the gas state of the incandescent bulb among the light spectrum emitted during the discharge. Compare the intensity of light in at least two wavelength ranges: light in a predetermined wavelength range and light in other wavelength ranges with less fluctuation in output, and identify the above-mentioned incandescent bulb as a good product or a defective product based on this intensity ratio. It has a device.

Therefore, according to the present invention, incandescent light bulbs can be distinguished from non-defective products and defective products based on the intensity ratio of light in at least two wavelength ranges, that is, light in a predetermined wavelength range and light in other wavelength ranges, which is a parameter for determining the quality of incandescent light bulbs. Even if the output levels of the two wavelength ranges fluctuate due to different discharge occurrence conditions, the intensity ratio of both lights remains almost constant, so the selection can be performed. . In other words, it is possible to accurately and reliably classify whether the battery is good or bad even if the conditions of occurrence of discharge are different, so that the selection ability can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of an automatic sorting device for incandescent light bulbs according to the present invention, and FIG. 2 is a spectral distribution diagram showing the light spectrum emitted during discharge according to the quality of the incandescent light bulb.
FIG. 3 is a frequency distribution diagram showing the selection results according to the embodiment shown in FIG. 1, FIG. 4 is a schematic diagram of a conventional example, and FIG. 5 is a block diagram of another conventional example. 20... Incandescent light bulb, 21... High frequency lightning generator,
24...Discharge terminal, 30...Glass bulb, 31.
...First light sensor, 32...Second light sensor, 34...
Computer. = 12- - Ubin Kaikan Sakae Geba Ya Kenki Ken edition Ukebutsu Tsuri 4 Zucha 5 Diagram procedure amendment (Jiri September 3, 1986 Director General of the License Agency Black 1) Indication of Akio Tono Incident Showa 1960 Patent Application No. 167394 Name of the invention Automatic selection device for incandescent light bulbs 3 Relationship with the amended case Patent applicant

Claims (1)

[Claims] 1. A discharge generating device that applies a high voltage to an incandescent bulb to generate a discharge, and of the light spectrum emitted during the discharge, the output is varied according to the gas state of the incandescent bulb. It is characterized by having an identification device for identifying the above-mentioned incandescent light bulb as a good product or a defective product based on the intensity ratio of light in at least two wavelength ranges: light in a predetermined wavelength range and light in another wavelength range whose output does not fluctuate. Automatic sorting device for incandescent light bulbs. 2. The incandescent light bulb is a gas-filled incandescent light bulb whose main component is a mixed gas of argon gas and nitrogen gas, and the light in the predetermined wavelength range is light in the wavelength range around 560 nm. Automatic sorting device for incandescent light bulbs as described. 3. The automatic glow sorting device for incandescent light bulbs according to claim 2, wherein the light in other wavelength ranges is light in a wavelength range around 670 nm.