JP5996700B2 - Lighting apparatus and method of manufacturing the lighting apparatus - Google Patents

Description

  The present invention relates to a lighting fixture and a method for manufacturing the lighting fixture, for example, a lighting device using a straight fluorescent lamp as a light source in a salt damage area such as the Okinawa region and the surrounding area.

There are the following types of straight tube fluorescent lamps or lighting fixtures.
1. Lighting equipment for straight tube fluorescent lamps that are lit at commercial frequency or high frequency (AC lit straight tube fluorescent lamps that are not DC lighting).
2. Lighting equipment for straight tube fluorescent lamps using a waterproof socket with improved waterproofness at the end of the lamp.
3. Lighting equipment for straight tube fluorescent lamps with a transparent resin windproof tube that does not come into contact with or close to the lamp periphery.
4). Anti-scattering straight tube fluorescent lamp that covers the entire lamp with a shrink resin tube and prevents glass fragments from being damaged.
5. A straight tube fluorescent lamp whose mercury content has been reduced to 5 mg or less by reducing the amount of mercury.
6). Installation method of lighting fixtures where the lighting fixture body is grounded.

JP 2007-305431 A JP 2009-245845 A Japanese Utility Model Publication No. 38-15356 Japanese Patent Laid-Open No. 2005-26025

There is a phenomenon that the total luminous flux of fluorescent lamps used in outdoor eaves lighting fixtures with waterproof sockets becomes low, and the light emission color becomes light pink.
An object of this invention is to provide the lighting fixture which solves the said phenomenon, and the manufacturing method of a lighting fixture.

This invention
A glass tube, a base provided at both ends of the glass tube, an electrode disposed near the center of the glass tube from the base, and an outer periphery of the glass tube from the base to the surrounding portion of the electrode are covered. A lamp having a resin shrinkable tube;
A lighting fixture body having a fixture socket to which the base is attached;
An annular rubber packing attached to both ends of the lamp;
A waterproof cap that is attached to the appliance socket and tightly contacts the rubber packing around the lamp;
It is provided with.

  According to the present invention, moisture containing salt suppresses the electrical connection between the base (metal shell) and the outer surface of the glass tube (lamp main body glass tube), so that mercury ions are contained in the rubber packing of the glass tube. Aggregation in a corresponding portion is reduced, the total luminous flux of the fluorescent lamp is lowered, and the phenomenon that the emission color becomes a light pink color does not occur.

The structure figure of the straight tube | pipe type fluorescent lamp lighting fixture with a waterproof socket. The structure figure of the straight tube | pipe type fluorescent lamp lighting fixture with a waterproof socket. The structure figure of the straight tube | pipe type fluorescent lamp lighting fixture with a waterproof socket. FIG. 3 is a structural diagram of a straight tube fluorescent lamp apparatus with a windproof tube and a waterproof cap according to the first embodiment. FIG. 3 is a structural diagram of a straight tube fluorescent lamp apparatus with a windproof tube and a waterproof cap according to the first embodiment. FIG. 6 is a structural diagram of a straight tube fluorescent lamp device with a scattering prevention film according to a second embodiment. FIG. 6 is a structural diagram of a straight tube fluorescent lamp illuminator using a shrinkable tube according to a third embodiment. The figure which shows the experiment example of Embodiment 1,2,3, and its result.

≪Background to Invention≫
Lighting equipment for straight tube fluorescent lamps is installed under the eaves of large stores in salt-affected areas such as the Okinawa region and surrounding areas. Here, the following trouble cases that have never existed were reported.
The fluorescent lamp FHF32EX-N, which has been used for outdoor eaves lighting fixtures with waterproof sockets and no windproof tubes at commercial facilities in Okinawa, has been lit only for about 3,000 hours. It was a color.
This defect is not a new installation of the lighting fixture, and has already had a history of replacing the fluorescent lamp in the form of having completed the life of the fluorescent lamp more than twice in the past, and there has never been a similar problem in the past. Initially thought to be a problem with fluorescent lamps, this phenomenon occurred in large stores, and occurred mostly only in lighting fixtures with waterproof sockets under the outdoor eaves. However, several thousand lamps with the same name on the same production day (same production lot) are turned on in the store. However, it has been found that such a symptom has never occurred, and it is difficult to identify the cause of the failure. there were.

  This symptom is the same as that described in “0043” of Japanese Patent Application Laid-Open No. 2007-305431, in which all of the enclosed mercury is consumed and the mercury-less lighting state is reached, and ultraviolet rays generated from mercury discharge. It was considered that the amount of luminescence of the phosphor decreased due to the lack of light and the entire fluorescent lamp became dark. And since mercury vapor discharge could not secure a sufficient discharge current, it was considered that the argon gas enclosed as a buffer gas was involved in the discharge. Actually, when the fluorescent lamp in which the symptom occurred was measured, visible light emission from a weak argon discharge was confirmed. However, such a symptom never occurred in fluorescent lamps of the same production lot that were installed indoors in the same store.

When observing the light flux lowering lamp, a very dark portion (black spot) was observed on the inner surface of the fluorescent lamp at the portion in close contact with the rubber packing of the waterproof socket (FIG. 1). When the spectral distribution of the lamp was measured, infrared radiation generated from Ar gas discharge was observed. In general, a fluorescent lamp has a tube filled with mercury vapor, and a phosphor layer formed on the inner surface of the glass tube emits visible light by ultraviolet rays generated from mercury vapor discharge. However, the ultraviolet light from mercury seems to have decreased significantly, and the phosphor visible emission decreased with this spectrum. On the other hand, barium and mercury were detected by analyzing the black spot. It seems that black spots were trapped at the end of the lamp in such a way that the mercury was difficult to evaporate, and the mercury corresponding to the saturated mercury vapor pressure did not evaporate in the tube, resulting in an unsaturated state.
This black spot portion of the fluorescent lamp was heated with an industrial dryer to a tube wall temperature of about 250 ° C., and heating was continued for about 5 minutes. This heating was performed while lighting the lamp with a predetermined lighting device. As a result, it was thought that mercury had evaporated from the black spots at the end with heating, and the fluorescent light emission gradually started from the end, whereas the whole was dim pink light emission before the heating. It began to return and eventually returned to normal brightness. Thereafter, the total luminous flux, electrical characteristics, and spectral distribution of the lamp were measured, but the characteristics were quite normal.

The light emission from the fluorescent lamp in this transient phenomenon is observed as a spectral distribution, λ = 811.4 nm as a representative value of light emission from Ar gas discharge, and λ = 543 nm as a representative value of light emission from mercury (this is the value of phosphor) The luminescence peak is the amount of luminescence of the phosphor that receives ultraviolet rays generated from mercury discharge and converts to green, and is used as a substitute characteristic of the amount of ultraviolet rays generated from Hg discharge. As a result, at first, infrared emission from Ar discharge is mostly observed, and visible emission from phosphor is relatively small, but emission from Ar decreases with time, and instead visible emission from phosphor. Increased. Separately, ultraviolet emission from mercury itself was also observed, but an increase similar to that at λ = 543 nm was observed.
This phenomenon is not a normal mercury vapor discharge, but a discharge form in which Ar discharge compensates for the lack of mercury, and mercury is released into the discharge space by heating. Then, since mercury Hg has a lower ionization voltage than Ar, it contributes mainly to the discharge, and it is considered that the ratio of Ar discharge with a high ionization voltage gradually decreased.
In the past, there has been no report of such a symptom that many fluorescent lamps in the market become dim pink in an extremely short usage time of several thousand hours at the same time. Furthermore, this phenomenon is not simply due to a manufacturing failure of a fluorescent lamp, which is more obvious than the fact that lamps of the same production lot are used without any problems in indoor lighting applications of the same facility.

  Many cases of this symptom, including related companies, were investigated, but it was confirmed that no such cases occurred at least in Honshu. On the other hand, when investigating whether there were other such cases in Okinawa, similar symptoms were found in multiple properties. These were found in parking lots and public transportation related facilities, etc., and the manufacturers and light source colors were scattered. Therefore, this phenomenon was not a problem unique to a single company, but seemed to be a phenomenon that occurred only in some areas and some lighting fixtures. However, even in Okinawa, similar lighting fixtures have been used for decades, and it was unclear why this phenomenon became apparent recently.

In the existing equipment, such a problem occurs after a new lamp replacement even though no problem has occurred in the past, for the following reason.
This is because each manufacturer reduces the amount of mercury enclosed in fluorescent lamps year by year through the RoHS Directive and environmentally conscious design efforts. In the old days, about 10 to 20 mg of liquid mercury was sealed per fluorescent lamp. Even at that time, in the case where the conditions such as the present case were established, black spots due to edge mercury aggregation occurred in the Okinawa area. However, since the aggregation was saturated and there was surplus mercury, there was no shortage of mercury vapor in the lamp, and no symptoms of malfunction occurred. Recently, the mercury content has been reduced to less than 5 mg in consideration of the environmental impact of each company. For this reason, when all of the enclosed mercury aggregates at the end, the excess mercury disappears and the mercury discharge cannot be maintained, and a symptom of pink emission due to Ar discharge is observed.

  Originally, rubber packing should be used for the purpose of preventing water (or rainwater containing salt) from entering the lamp end, but in reality, it is spread and deteriorated by multiple lamp replacements, or Due to variations in lamp diameter and differences between manufacturers, there is actually a gap, and the salt water soaked here is difficult to evaporate, and the outer surface conductivity at the end of the lamp is always maintained. . As a result of actually analyzing the deposit on the base, it was found to be a salt. That is, it has been found that rainwater containing salt covering the glass tube and the metal shell part of the base has an electrical connection between the metal base shell part and the glass of the lamp body.

Although the details of the clear mechanism of the occurrence of the defect are not clear, the inventors have estimated that the clear mechanism of the occurrence of the defect is as follows.
1. Moisture containing salt adheres to the outer surface of the glass tube at the end of the lamp.
2. The salt water penetrates between the waterproof packing and the glass tube. This is due to deterioration of the waterproof packing due to repeated replacement of fluorescent lamps, deterioration over time, and infiltration of salt water from gaps caused by differences between manufacturers.
3. The permeated salt water is hard to evaporate due to heat generated when the lamp is turned on, and the metal shell part of the base and the outer surface of the fluorescent lamp glass tube are electrically short-circuited.
4). Further, the salt water is electrically short-circuited to a grounded or substantially grounded lighting fixture body, and is electrically connected to the outer surface of the glass tube of the waterproof socket portion.
5. During the lamp operation, the positive charge of mercury ions generated inside the lamp is electrically attracted to and adhered to the outer surface of the glass tube of the substantially grounded lamp end waterproof socket portion.
6). Although initially deposited as re-evaporable metallic mercury, it forms an amalgam with sodium or the like, which is a glass tube component, or becomes mercury oxide, making it difficult to contribute to the discharge.
7). Thus, the amount of ineffective mercury that cannot be evaporated increases. For example, in the case of a straight tube of 40 W, several μg of mercury required for mercury vapor discharge (about 1 / 1,000 of the enclosed amount) of mercury enclosed in several mg. Even evaporation is impossible. Here, there is a limit to the total amount of mercury attached to the waterproof socket equivalent, which is about 4 to 5 mg. If more mercury is sealed, liquid mercury that can be evaporated is saturated in the lamp. A sufficient amount to reach the mercury vapor pressure becomes redundant, and this defect is not observed in the first place.
8). Mercury vapor discharge cannot be maintained, and Ar gas filled with insufficient discharge current as a buffer gas contributes to the discharge and maintains the discharge.
9. Although the discharge is maintained, since the ultraviolet radiation from mercury is reduced, the phosphor emits less light. Instead, infrared or pink visible light emission from the Ar discharge is observed.

The following countermeasures are available for this problem.
Countermeasure 1. Increase the amount of mercury in the fluorescent lamp as before.
Measure 2 Do not use AC lighting with commercial frequency or high frequency, use DC lighting.
Measure 3 Prevent salty water from entering under the waterproof packing.

  Although the above-mentioned measure 1 already has a past record, it is not desirable from the viewpoint of environmental load. Measure 2 requires a catalysis phenomenon and needs to be replaced with a new lighting circuit. Therefore, measure 3 is desirable, and all of the embodiments described below are directed to measure 3. The above measure 3 is the best from the viewpoint of reducing the environmental load.

The solution chosen by the inventors is not to deal with a lamp with increased mercury, but to change to a direct current lighting system, as follows.
Embodiment 1 FIG. Modify the equipment to add a windproof tube.
Embodiment 2. FIG. Replace the lamp with one that prevents splashing.
Embodiment 3 FIG. Cover both ends of the lamp and the socket with a shrink tube, and then heat-shrink to improve moisture and water resistance.

Embodiment 1 FIG.
4 and 5 are diagrams showing a part of the lighting apparatus of the first embodiment.
The luminaire includes a luminaire main body 100 and a straight tube fluorescent lamp 10 (hereinafter also simply referred to as a fluorescent lamp 10). The luminaire main body 100 has a waterproof socket 20 to which the fluorescent lamp 10 is attached.
The waterproof socket 20 includes an instrument socket 21, a cylindrical packing 16, a windproof packing 17, and a waterproof cap 22.
The appliance socket 21 is formed with an annular annular recess 25 for fitting the windproof packing 17 and a spiral male screw groove 26 into which the waterproof cap 22 is screwed.

The fixture socket 21 and the fluorescent lamp 10 of the lighting fixture shown in FIGS. 4 and 5 are the same as the fixture socket 21 and the fluorescent lamp 10 shown in FIG. The waterproof cap 122 of the lighting fixture shown in FIGS. 4 and 5 has a shape different from that of the waterproof cap 22 shown in FIG.
The cylindrical packing 16 has an annular and cylindrical shape, and one end thereof is fitted into the annular recess 25 of the instrument socket 21. The cylindrical packing 16 is rubber or silicon and is deformed by pressure.

The windproof packing 17 has an annular and cylindrical shape as a whole, is rubber or silicon, and is deformed by pressure. The outer periphery of the windproof packing 17 is fitted into the inner periphery of the cylindrical packing, and the inner periphery contacts the outer periphery of the fluorescent lamp 10.
The cross-sectional shape of the windproof packing 17 in the central axis direction is a convex shape, a T shape, an L shape, or a Z shape. In the middle of the windproof packing 17, there is an annular step that fits the inner periphery of the end of the windproof tube 30.
A convex portion 28 at the outer peripheral tip of the windproof packing 17 is press-fitted into the inner periphery of the cylindrical packing 16 to provide a waterproof effect.

  Further, the bottom portion 29 of the windproof packing 17 is in close contact with the outer periphery of the glass tube 11 of the fluorescent lamp 10 to provide a waterproof effect. Even if water enters the inner periphery of the windproof packing 17, the bottom portion 29 of the windproof packing 17 is in close contact with only the glass tube 11 and does not extend to the base 12, so that the base 12 (the metal shell thereof) The electrical connection between the outer surface of the fluorescent tube (glass tube 11) is suppressed. Even if the bottom portion 29 of the windproof packing 17 is brought into close contact with only the base 12, there is an effect of suppressing the electrical connection between the base 12 (the metal shell thereof) and the outer surface of the fluorescent tube (glass tube 11).

  The windproof tube 30 is a transparent or translucent pipe that covers the periphery of the glass tube 11 of the fluorescent lamp 10. The inner periphery of the end of the windproof tube 30 is attached to the outer periphery of the annular step of the windproof packing 17 so that a waterproof effect is achieved.

  The waterproof cap 122 has an annular and cylindrical shape, and a female screw groove 27 is cut inside. The female thread groove 27 of the waterproof cap 122 is screwed into the male thread groove 26 of the instrument socket 21 while rotating, and the waterproof cap 122 fixes the cylindrical packing 16 to the instrument socket 21. The waterproof cap 122 is different in shape from the waterproof cap 22 shown in FIGS. 1 to 3, but has the same screw diameter and screw pitch.

  The ring 118 has a donut shape, and has the same inner diameter as the cylindrical packing 16 and the same outer diameter. The ring 118 is made of resin, rubber, or plastic. The ring 118 is sandwiched between the inner wall of the waterproof cap 122 and one end of the cylindrical packing 16. The ring 118 has a different inner diameter and outer diameter from the ring 18 shown in FIGS.

Hereinafter, the manufacturing method of the lighting fixture of Embodiment 1 is demonstrated.
Here, a method of manufacturing the waterproof and windproof luminaire shown in FIG. 5 from the waterproof luminaire shown in FIG. 2 will be described. The lighting fixture body 100 has a fixture socket 21 to which the fluorescent lamp 10 is attached. The appliance socket 21 is formed with an annular recess 25 for fitting the windproof packing 17 and a male screw groove 26 into which the waterproof cap 122 is screwed.
First, the following annular cylindrical packing 16, annular windproof packing 17, annular waterproof cap 122 and ring 118 are manufactured in advance.

The outer diameter of the cylindrical packing 16 is equal to the minimum inner diameter of the waterproof cap 122.
The inner diameter of the cylindrical packing 16 is larger than the outer diameter of the convex portion 28 of the windproof packing 17. However, it is slightly large enough to allow press-fitting.
The inner diameter of the bottom portion 29 of the windproof packing 17 is equal to the outer diameter of the glass tube 11 (or the base 12) or slightly small enough to allow press-fitting.
The female thread groove 27 of the waterproof cap 122 has the same pitch of the male thread groove 26 of the instrument socket 21.
The ring 118 has the same inner diameter as the cylindrical packing 16 and the same outer diameter.

1. Removal Step The waterproof cap 22 of FIG. 2 is rotated to remove the waterproof cap 22 from the instrument socket 21. The waterproof cap 22 comes off to the right in FIG.
In FIG. 2, when the waterproof cap 22 is removed, the pressure from the waterproof cap 22 to the ring 18 and the rubber packing 23 is eliminated, so that the adhesion between the rubber packing 23 and the fluorescent lamp 10 is weakened as shown in FIG. Alternatively, the contact between the rubber packing 23 and the fluorescent lamp 10 is eliminated.
Next, the rubber packing 23 is removed from the annular recess 25 of the instrument socket 21, and the rubber packing 23 is shifted to the right side in FIG.
Next, the pin 13 of the fluorescent lamp 10 is removed from the appliance socket 21, and the fluorescent lamp 10, the rubber packing 23, the ring 18 and the waterproof cap 22 are removed from the appliance main body 100. The rubber packing 23, the ring 18 and the waterproof cap 22 are discarded because they will not be used in the present embodiment in the future.
At this point, only the instrument socket 21 of FIG. 1 remains bare.

2. Next, the fluorescent lamp 10 is passed through the windproof tube 30. The fluorescent lamp 10 may be new or removed from the instrument body 100.
Next, the windproof packing 17 is fitted and attached to both ends (or the base 12) of the glass tube 11 of the fluorescent lamp 10, the end of the windproof tube 30 is placed on the outer periphery of the windproof packing 17, and the windproof tube 30 is floated from the glass tube 11. To the state. The windproof tube 30 is cut in advance such that the windproof packing 17 can be positioned at both ends (or the base 12) of the glass tube 11.
Next, the windproof tube 30 having the fluorescent lamp 10 inside is passed through the waterproof cap 122 and the ring 118. Further, the cylindrical packing 16 is fitted on the outer periphery of the convex portion 28 of the windproof packing 17.
Next, the pin 13 is inserted into the appliance socket 21 and the fluorescent lamp 10 is attached to the appliance socket 21.
Further, one end of the windproof packing 17 is fitted into the annular recess 25. Thus, the state of FIG. 4 is obtained.
Next, the female screw groove 27 of the waterproof cap 122 is screwed into the male screw groove 26 of the instrument socket 21. The waterproof cap 122 moves toward the instrument socket 21 and pressurizes the ring 118 and the cylindrical packing 16.

  As shown in FIG. 5, the ring 118 is sandwiched between the inner wall of the waterproof cap 122 and one end of the cylindrical packing 16, so that the cylindrical packing 16 is deformed and the entire outer periphery of the convex portion 28 of the windproof packing 17. Close contact with.

Thus, the manufacturing method of the lighting fixture of Embodiment 1 is the method of remodeling the lighting fixture with a waterproof socket into the lighting fixture with a waterproof socket and a windproof tube.
In order to retrofit a windproof tube to a lighting fixture with a waterproof socket, it is necessary to select and obtain parts and to modify the lighting fixture. In the first place, in order to make a luminaire with a windproof tube, the structure of the socket part is different from the illuminator with a waterproof socket (Fig. 1), which is currently in trouble, and it is a completely different model as a fixture. Is also different.
In order to modify this later, the windproof packing 17, the ring 18 and the waterproof cap 22 shown in FIG. 1 are removed, and as shown in FIGS. 4 and 5, the cylindrical packing 16, windproof packing 17, and FIG. A ring 118 having a structure different from that of FIG. 1, a waterproof cap 122 having a structure different from that of FIG.

  Here, if they are from the same manufacturer, the screw pitch of the waterproof cap may be the same. However, the design is changed with the production time, and the waterproof cap 22 is not necessarily diverted. In the first place, the purpose of using the windproof tube 30 is irrelevant to windproof, and is intended to prevent moisture containing salt, which will be described later, from adhering to the vicinity of the end cap of the fluorescent lamp 10. Although the original windproof packing 17 of FIG. 1 was installed for this purpose, its function becomes incomplete due to deterioration, or unexpected salt water penetration occurs, so that moisture from the windproof tube 30 is generated. Need to be isolated.

  As described above, the lighting apparatus according to Embodiment 1 is used in the salt damage area and its surroundings, in the islands other than Honshu and in the south of Honshu, or in Okinawa and its neighboring islands. It is suitable when using the fluorescent lamp 10 installed under the outdoor eaves.

  Although the waterproof socket is used, the lighting fixture of Embodiment 1 is a lighting fixture in which the windproof tube is not originally installed. The fluorescent lamp 10 is turned on at a commercial frequency by a magnetic ballast, or is turned on at a high frequency by a high frequency lighting circuit, and is not a direct current lighting.

The lighting fixture body of the fluorescent lamp 10 is substantially grounded.
Furthermore, the enclosed mercury amount of the combined fluorescent lamp 10 is an enclosed amount of 5 mg or less.
The lighting apparatus according to Embodiment 1 is characterized in that the fluorescent lamp 10 of the lighting apparatus is covered with a windproof tube 30.

Embodiment 2. FIG.
FIG. 6 is a diagram illustrating a part of the lighting apparatus of the second embodiment. The difference from FIG. 1 is that the scattering prevention tube 40 is provided on the outer periphery of the fluorescent lamp 10. The thickness of the scattering prevention tube 40 is about 100 μm.

  The fluorescent lamp 10 includes a glass tube 11, a base 12 provided at both ends of the glass tube 11 and attached to a fixture socket 21, an electrode 14 disposed near the center of the glass tube 11 from the base 12, a base 12 and the glass tube 11. And an anti-scattering tube 40 made of a resin shrinkable tube covering the entire outer periphery.

  The scattering prevention tube 40 may not be provided in the entire glass tube 11, and may be in a range in which salt water permeation can be suppressed. For example, at least from the base 12 to the electrode surrounding portion 15 of the electrode 14.

The manufacturing method of the lighting fixture which manufactures the waterproof lighting fixture of FIG. 6 from the waterproof lighting fixture of FIG. 1 is as follows.
1. Removal Step The removal step performs the same operation as in the first embodiment.
2. Mounting Step The fluorescent lamp 10 is passed through the scattering prevention tube 40, and the scattering prevention tube 40 is contracted with hot air such as a dryer.

Next, the fluorescent lamp 10 covered with the anti-scattering tube 40 is passed through the waterproof cap 22 removed in the removal step, and further passed through the rubber packing 23.
Next, the pin 13 of the fluorescent lamp 10 is attached to the appliance socket 21.
Next, the rubber packing 23 is attached to the annular recess 25.
Next, the waterproof cap 22 is screwed into the instrument socket 21 and attached. The rubber packing 23 comes into close contact with the glass tube 11. Since the adhesion between the rubber packing 23 and the glass tube 11 is increased by the thickness of the scattering prevention tube 40, the waterproof effect is improved.

  The anti-scattering fluorescent lamp 10 is more costly and expensive than a normal fluorescent lamp without an anti-scattering tube. However, the tube of about 100 μm fills the gap between the rubber packing 23 of FIG. 1 and the end of the glass tube 11 of the fluorescent lamp 10 to suppress the penetration of salt water, and even if there is a slight penetration of salt water, Since the contact with the metal part is suppressed, the occurrence of defects can be effectively suppressed.

  As described above, the lighting fixture and the fluorescent lamp 10 of the second embodiment are the same as those of the first embodiment, and the fluorescent lamp 10 to be used is covered with the scattering prevention tube 40 (resin shrinkable tube). And After the scattering prevention tube 40 contracts, the scattering prevention tube 40 covers the entire metal base 12 at both ends of the fluorescent lamp 10. Furthermore, the scattering prevention tube 40 is closely attached to the electrode surrounding portion 15 at least from the boundary portion including the glass boundary of the base 12 to the base 12 of the lamp.

Embodiment 3 FIG.
FIG. 7 is a diagram illustrating a part of the lighting apparatus of the third embodiment.
The difference from FIG. 1 is that there is a shrinkable tube 50 on the outer periphery of the waterproof cap 22 and the fluorescent lamp 10. The shrink tube 50 is made of a resin shrink tube.
The shrinkable tube 50 may be covered on the outer periphery of the glass tube 11 from the outer periphery of the end of the waterproof cap 22 to at least the surrounding portion of the electrode 14. However, the whole glass tube 11 may be covered, and if the whole is covered, there is an effect that helps to prevent the glass tube 11 from scattering.

The manufacturing method of the lighting fixture which manufactures the waterproof lighting fixture of FIG. 7 is as follows.
1. Mounting Step The fluorescent lamp 10 is passed through the waterproof cap 22, the rubber packing 23 is further passed through the fluorescent lamp 10, and the fluorescent lamp 10 is further passed through the shrinkable tube 50 whose diameter is larger than the diameter of the waterproof cap 22.
The pin 13 of the fluorescent lamp 10 is attached to the appliance socket 21.
The rubber packing 23 is attached to the annular recess 25.
The waterproof cap 22 is screwed into the instrument socket 21 and attached.

2. Covering Step The shrinkable tube 50 is aligned with the waterproof cap 22 so that the waterproof cap 22 and the glass tube 11 are covered, and the waterproof cap 22 is contracted with hot air such as a dryer. After contraction, the contraction tube 50 covers the waterproof cap 22 and the glass tube 11 as shown in FIG.

  Shrinking with a dryer takes more time than simply replacing the lamp, but salt water penetration can be suppressed by covering the appliance socket 21 and the lamp end with the shrink tube 50.

  As described above, the lighting fixture and the fluorescent lamp 10 of the third embodiment are the same as those of the first embodiment, and the fixture socket 21 and the lamp end are collectively contracted and sealed with the anti-scattering tube, It is characterized in that at least moisture resistance between the lamp ends and the appliance socket 21 is improved.

*** Experimental examples and results of Embodiments 1, 2 and 3 ***
FIG. 8 shows experimental examples and results of the first, second, and third embodiments.
The effects of the first, second, and third embodiments were confirmed in two places, Yomitan Village in Okinawa Prefecture and Naha City, where the problem occurred. The lighting fixtures are all for FHF32 lamps, which are high-frequency lighting fixtures for one and two lamps (Mitsubishi Electric Lighting Co., Ltd., etc.), and a waterproof packing (rubber packing 23) is installed in the fixture socket 21. The windproof tube was not used. All these lighting fixtures are installed under the same eaves in the same place. Lighting was performed at a rated voltage of 20 hours per day. This was continued and the occurrence of the phenomenon was confirmed, and the amount of mercury aggregated in the equivalent part of the waterproof packing after lighting for 2,000 hours was measured. In this measurement, three samples were cut (corresponding to both ends, glass tubes at both ends were treated with nitric acid, only mercury was collected, and the amount of mercury was measured by weight. FIG. Mercury agglomeration was visually confirmed, and the symptom occurrence time was indicated by the lighting time of the earliest out of the three, because the earliest occurrence is considered to be a reproduction of the occurrence. It is.

In Comparative Examples 1 and 2, since the amount of mercury was 10 mg, no malfunction occurred. In Comparative Example 1, there was no occurrence of defects, but since it was originally a lighting fixture for outdoor use, rubber packing should be attached, and the occurrence of defects could be avoided, but it was excluded from the effective products.
The defect example 1 is an example in which only the rubber packing 23 and the waterproof cap 22 are used with 60 Hz lighting.
The defect example 2 is an example in which only the rubber packing 23 and the waterproof cap 22 are used with 45 kHz lighting, and a defect occurred.
In Comparative Example 4, there was no occurrence of defects, but since it was originally a lighting fixture for outdoor use, rubber packing should be attached, and the occurrence of defects could be avoided, but it was excluded from the effective products.
The comparative example 5 was direct current lighting and the catalysis phenomenon occurred.

The implementation products 1 to 6 are effective implementation products, and are the following combinations.
Implementation product 1 (Embodiment 1): 60 Hz lighting + windproof packing 17 + windproof tube 30
Implementation product 2 (Embodiment 2): 60 Hz lighting + rubber packing 23 + scattering prevention tube 40
Implementation product 3 (Embodiment 3): 60 Hz lighting + rubber packing 23 + shrinkable tube 50
Implementation product 4 (Embodiment 1): 45 kHz lighting + windproof packing 17 + windproof tube 30
Implementation product 5 (Embodiment 2): 45 kHz lighting + rubber packing 23 + scattering prevention tube 40
Implementation product 6 (Embodiment 3): 45 kHz lighting + rubber packing 23 + shrinkable tube 50

<Confirmation of effects of first, second, third embodiments>
In Okinawa, there is a case where the anti-scattering fluorescent lamp 10 is installed under the eaves and is used by a lighting fixture. Similarly, there are cases where instruments with windproof tubes are installed. These do not have this problem. This problem only occurs in devices that are not provided with them. Although we have confirmed these effects, among the possible countermeasures to be taken when this defect occurs in these unapplied equipment, we can cope with it from the viewpoint of reducing the environmental impact. Even if it costs a little, we have concluded that the above measures are good.

  As described above, according to the first, second, and third embodiments, the means of the present embodiment indicates that moisture including salt is electrically connected between the metal shell and the outer surface of the lamp body glass tube. In order to suppress effectively, it is reduced that mercury ion aggregates in a waterproof packing equivalent part, and this malfunction phenomenon does not occur.

  Now that the mechanism of failure has been found, it has been found that a luminaire with a windproof tube helps to eliminate this saltwater penetration problem, although it is different from the original purpose of windproofing. That is, if the lighting fixture with a waterproof socket is discarded and replaced with a lighting fixture with a windproof tube, the problem is solved. However, it creates a new cost of replacing the lighting fixtures and an environmental burden of eliminating the lighting fixtures with waterproof sockets that can still be used.

  The measures described in the first, second, and third embodiments are meaningful selections from the viewpoint of environmental considerations.

  The first, second, and third embodiments may be combined. In the first, second, and third embodiments, the case of the straight tube type fluorescent lamp 10 has been described. However, the present invention is not limited to the straight tube type fluorescent lamp, and may be a single-end type fluorescent lamp or a ring type fluorescent lamp. Further, the first, second, and third embodiments can be applied to prevent electrical contact between the base and the glass tube in the case of other lamps as well as fluorescent lamps.

The lighting fixture of the embodiment described above has a fixture socket to which a lamp is attached, and the fixture socket is formed with an annular recess for fitting a rubber packing and a screw groove into which a waterproof cap is screwed.
A cylindrical packing whose one end is fitted into the annular recess of the instrument socket;
An annular windproof packing that fits into the inner periphery of the cylindrical packing and contacts the outer periphery of the lamp;
Windproof tube with an end attached to the outer periphery of the windproof packing and covering the lamp,
A waterproof cap is provided which is screwed into the thread groove of the instrument socket and attaches the cylindrical packing to the windproof packing.

The lighting apparatus of the above-described embodiment is
A lighting fixture body having a fixture socket;
An annular rubber packing;
A waterproof cap that attaches to the fixture socket and attaches rubber packing to the periphery of the lamp,
A glass tube, a base provided at both ends of the glass tube and attached to an instrument socket, an electrode disposed near the center of the glass tube from the base, and a resin shrinkable tube coated on the outer periphery of the glass tube at least from the base to the electrode surrounding portion And a lamp having the above.

The lighting apparatus of the above-described embodiment is
A lighting fixture body having a fixture socket;
An annular rubber packing;
A waterproof cap that attaches to the fixture socket and attaches rubber packing to the periphery of the lamp,
A lamp having a glass tube, a base provided at both ends of the glass tube and attached to an instrument socket, and an electrode disposed near the center of the glass tube from the base;
And a resin-made shrinkable tube covering the outer periphery of the glass tube from the outer periphery of the end portion of the waterproof cap to at least the electrode surrounding portion.

  The lighting fixture is a straight tube fluorescent lamp with an enclosed mercury amount of 5 mg or less, which is lit at a commercial frequency with a magnetic ballast, or at a high frequency with a high frequency lighting circuit, and the fixture body is grounded. It is characterized by.

The manufacturing method of the lighting fixture according to the embodiment described above has a fixture socket to which a lamp is attached, and the fixture socket is formed with an annular recess for fitting a rubber packing and a screw groove into which a waterproof cap is screwed. In a manufacturing method of a lighting fixture for manufacturing a waterproof and windproof lighting fixture from a lighting fixture,
Fit one end of the annular cylindrical packing into the annular recess of the instrument socket,
Put the windproof tube around the lamp and attach the end of the windproof tube to the outer periphery of the annular rubber packing attached to the outer periphery of the lamp,
Fit the annular rubber packing into the inner periphery of the cylindrical packing,
The waterproof cap is screwed into the thread groove of the instrument socket, and the cylindrical packing is brought into close contact with the rubber packing.

The manufacturing method of the lighting fixture of the embodiment described above is a manufacturing method of a waterproof lighting fixture.
Resin shrink on the outer periphery of the glass tube from at least the base to the electrode surrounding portion of the lamp having a glass tube, a base provided at both ends of the glass tube and attached to the instrument socket, and an electrode disposed near the center of the glass tube from the base Cover the tube,
Pass the lamp covered with the resin shrink tube through the annular waterproof cap and the annular rubber packing,
Attach the lamp to the instrument socket,
A waterproof cap is attached to the appliance socket, and a rubber packing is closely attached to the periphery of the lamp.

The manufacturing method of the lighting fixture of the embodiment described above is a manufacturing method of a waterproof lighting fixture.
Pass the lamp through the resin shrink tube, the annular waterproof cap and the annular rubber packing,
Attach the lamp to the instrument socket,
Attach the waterproof cap to the fixture socket, and attach the rubber packing to the lamp
The resin shrinkable tube is coated on the outer periphery of the glass tube from the outer periphery of the end portion of the waterproof cap to at least the electrode surrounding portion.

  10 fluorescent lamp, 11 glass tube, 12 base, 13 pin, 14 electrode, 15 electrode surrounding part, 16 cylindrical packing, 17 windproof packing, 18 ring, 19 black sum, 20 waterproof socket, 21 instrument socket, 22 waterproof cap, 23 rubber packing, 25 annular recess, 26 male thread groove, 27 female thread groove, 28 convex part, 29 bottom side part, 30 windproof tube, 40 anti-scattering tube, 50 contraction tube, 100 instrument body, 118 ring, 122 waterproof cap.

Claims (7)

A glass tube, a base provided at both ends of the glass tube, an electrode disposed near the center of the glass tube from the base, and an outer periphery of the glass tube from the base to the surrounding portion of the electrode are covered. A lamp having a resin shrinkable tube;
A lighting fixture body having a fixture socket to which the base is attached;
An annular rubber packing attached to both ends of the lamp;
A waterproof cap that is attached to the appliance socket and tightly contacts the rubber packing around the lamp;
A lighting fixture comprising:   The lighting fixture according to claim 1, wherein the resin shrinkable tube fills a gap between the rubber packing and the glass tube by attaching the waterproof cap to the fixture socket. A lamp having a glass tube, a base provided at both ends of the glass tube, and an electrode disposed near the center of the glass tube from the base;
A lighting fixture body having a fixture socket to which the base is attached;
An annular rubber packing attached to both ends of the lamp;
A waterproof cap that is attached to the appliance socket and tightly contacts the rubber packing around the lamp;
A resin-made shrinkable tube coated on the outer periphery of the glass tube from the outer periphery of the end of the waterproof cap to the surrounding portion of the electrode;
A lighting fixture comprising:   The lighting device according to claim 3, wherein the rubber packing is in close contact with the glass tube when the waterproof cap is attached to the appliance socket.   In the lighting fixture, a straight fluorescent lamp with an enclosed mercury amount of 5 mg or less is lit at a commercial frequency by a magnetic ballast, or at a high frequency by a high frequency lighting circuit, and the lighting fixture body is grounded. The lighting fixture according to any one of claims 1 to 4, wherein A glass tube, a base provided at both ends of the glass tube, an electrode disposed near the center of the glass tube from the base, and an outer periphery of the glass tube from the base to the surrounding portion of the electrode are covered. A lamp having a resin shrinkable tube, a lighting fixture body having an appliance socket to which the base is attached, an annular rubber packing attached to both ends of the lamp, and attached to the appliance socket, A method of manufacturing a lighting fixture comprising a waterproof cap that is closely attached to the periphery of the lamp,
The cap is attached to both ends of the glass tube, and a lamp covered with a resin shrinkable tube is passed through the annular waterproof cap and the annular rubber packing,
Attach the lamp to the appliance socket,
The manufacturing method of the lighting fixture characterized by attaching the said waterproof cap to the said fixture socket, and making the said rubber packing contact | adhere to the circumference | surroundings of the said lamp | ramp. A lamp having a glass tube, a base provided at both ends of the glass tube, and an electrode disposed near the center of the glass tube from the base; a lighting fixture body having a fixture socket to which the base is attached; An annular rubber packing attached to both ends of the lamp, a waterproof cap attached to the fixture socket, and tightly attaching the rubber packing to the periphery of the lamp, and the outer periphery of the waterproof cap to the surrounding portion of the electrode A shrinkable tube made of resin coated on the outer periphery of a glass tube, and a method for manufacturing a waterproof lighting fixture comprising:
The lamp is passed through the resin shrinkable tube, the annular waterproof cap, and the annular rubber packing,
Attach the lamp to the appliance socket,
Attaching the waterproof cap to the appliance socket;
The rubber packing is closely attached around the lamp,
The manufacturing method of the lighting fixture characterized by coat | covering the said resin shrinkable tube to the outer periphery of the said glass tube from the edge part outer periphery of the said waterproof cap to the collar part of the said electrode at least.

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