JP6685988B2 - Lighting equipment - Google Patents

Description

  The present invention relates to an illuminating device, for example, an illuminating device using a straight tube fluorescent lamp as a light source in a salt-damaged area such as Okinawa region and its surrounding area.

There are the following types of straight tube fluorescent lamps or lighting equipment.
1. Lighting equipment for straight tube fluorescent lamps (AC lighting straight tube fluorescent lamps, not DC lighting) that are lit at commercial or high frequencies.
2. Lighting equipment for straight tube fluorescent lamps that uses a waterproof socket with improved waterproofness at the end of the lamp.
3. A straight tube fluorescent lamp lighting fixture with a transparent resin windproof tube that does not come into contact with or adhere to the surroundings of the lamp.
4. A straight tube fluorescent lamp with a shatterproof resin tube that covers the entire lamp and prevents glass fragments from scattering when damaged.
5. A straight tube fluorescent lamp whose mercury content has been reduced to less than 5 mg.
6. The installation method of the luminaire in which the luminaire body is grounded.

JP, 2007-305431, A JP, 2009-245845, A Japanese Utility Model Publication No. 38-15356 JP, 2005-26025, A JP, 09-027210, A Japanese Utility Model Publication No. 41-010392 JP, 2009-199885, A JP, 11-135219, A JP, 2009-146627, A JP 2000-315557 A JP, 2007-207722, A JP, 2009-146627, A JP2012-248334A Micro film of No. Sho 53-121788

There is a phenomenon that the total luminous flux of the lamp used in the outdoor eaves lighting equipment with a waterproof socket becomes low and the emission color becomes a light pink color.
An object of the present invention is to provide a lighting device having a waterproof effect.

The lighting device of the present invention is
A translucent pipe arranged so as to cover the light source,
A tubular packing formed to correspond to the shape of the end portion in the axial direction of the pipe,
A cap arranged at an end portion in the axial direction with the packing in between, and a cap having an annular recess corresponding to the shape of the packing that faces the end portion of the packing,
The packing is
A first packing that is fitted into the annular recess, and a second packing that is arranged in close contact with the inside of the first packing and that is in close contact with the inner circumference of the pipe,
The cross-sectional shape of the second packing in the direction of the central axis has a convex portion whose outer peripheral tip is in close contact with the inner circumference of the first packing, and has an annular step on the middle side to fit the inner circumference of the end of the pipe. It has a character shape.

  According to the present invention, it is possible to provide a lighting device having a waterproof effect.

Structural drawing of a straight tube fluorescent lamp lighting fixture with a waterproof socket. Structural drawing of a straight tube fluorescent lamp lighting fixture with a waterproof socket. Structural drawing of a straight tube fluorescent lamp lighting fixture with a waterproof socket. 1 is a structural diagram of a straight tube type fluorescent lamp fixture with a windproof tube / waterproof cap according to a first embodiment. 1 is a structural diagram of a straight tube type fluorescent lamp fixture with a windproof tube / waterproof cap according to a first embodiment. FIG. 6 is a structural diagram of a straight tube type fluorescent lamp device with a scattering prevention film according to a second embodiment. FIG. 7 is a structural diagram of a straight tube fluorescent lamp lighting fixture using a shrinkable tube according to a third embodiment. The figure which shows the experimental example of Embodiment 1, 2, 3, and its result.

<< Background to invention >>
Lighting equipment for straight tube fluorescent lamps is installed under the outdoor eaves of large stores in the salt-damaged areas such as the Okinawa region and the surrounding areas. Here, the following non-existent failure cases were reported.
The fluorescent lamp FHF32EX-N that has been used for outdoor eaves lighting equipment with a waterproof socket and no windproof tube in a commercial facility in Okinawa, which has been turned on for only about 3,000 hours, has an extremely low total luminous flux and a light pink color. It was colored.
This problem was not due to the fact that the lighting fixture was newly installed, and it had a history of exchanging fluorescent lamps more than once in the past in the form of fulfilling the life of the fluorescent lamp, and there was no similar problem in the past. Initially thought to be a malfunction of the fluorescent lamp, this phenomenon occurred in large stores, and all occurred only in lighting fixtures with waterproof sockets under the outdoor eaves. However, although several thousand fluorescent lamps of the same name on the same production day (same production lot) were lit in the store, it was found that such a symptom did not occur at all, and it was difficult to identify the cause of the problem. there were.

  This symptom is the same as the one described in JP-A-2007-305431, “0043”, “All the enclosed mercury is consumed before the rated life is reached and the mercury-less lighting state is achieved”, and ultraviolet rays generated from mercury discharge. It was considered that the fluorescent light emission amount decreased due to the lack of light emission, and the entire fluorescent lamp became dark. Then, it was considered that the mercury vapor discharge could not secure a sufficient discharge current, and therefore the argon gas sealed as the buffer gas was involved in the discharge. Actually, when the fluorescent lamp in which the symptom occurred was measured, the visible light emission from the weak argon discharge was confirmed. However, such a symptom did not occur at all in the same production lot of fluorescent lamps installed indoors in the same store.

When observing the luminous flux reduction lamp, an extremely dark portion (blackening) was observed on the inner surface of the fluorescent lamp in 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 the Ar gas discharge was observed. Usually, a fluorescent lamp has a tube filled with mercury vapor, and the phosphor layer formed on the inner surface of the glass tube emits visible light due to ultraviolet rays generated by mercury vapor discharge. However, ultraviolet rays from mercury seemed to be extremely decreased, and the visible light emission of the phosphor was decreased along with this spectrum. On the other hand, barium and mercury were detected when the black spots were analyzed. It is considered that the black spots were trapped at the end of the lamp in a form in which it was difficult for mercury to evaporate, and the mercury equivalent to the saturated mercury vapor pressure was not evaporated in the tube, resulting in an unsaturated state.
This black portion of the fluorescent lamp was heated to a tube wall temperature of about 250 ° C. with an industrial dryer, and heating was continued for about 5 minutes. This heating was performed while lighting the lamp with a predetermined lighting device. As a result, before the heating, there was a defect, but the whole was a dim pink light emission, but it seems that mercury was evaporated from the black edges at the end with heating, and fluorescence emission gradually from the ends. It started to return and finally returned to normal brightness. After that, the total luminous flux, electrical characteristics, and spectral distribution of the lamp were measured, and the characteristics were completely normal.

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

  We investigated many cases of this symptom, including related companies, and confirmed that no such cases have occurred at least in Honshu. On the other hand, when a survey was conducted in Okinawa for other such cases, similar symptoms were found in multiple properties. These were found in parking lots and public transportation facilities, and the manufacturers and light source colors were scattered. Therefore, this phenomenon was not a problem peculiar to one company, but was considered to be a phenomenon that occurred widely and generally and only in a very small part of the area and a part of the lighting equipment. However, even in Okinawa, similar lighting equipment has been used for decades, and it was unclear why this phenomenon has recently become apparent.

The reason why such an inconvenience does not occur in the existing fixtures after the lamp is newly replaced despite the conventional inconvenience does not occur is as follows.
This is because each manufacturer is reducing the amount of mercury enclosed in fluorescent lamps year by year through the RoHS directive and environmentally friendly design efforts. In the old days, about 10 to 20 mg of liquid mercury was enclosed in each fluorescent lamp. Even at that time, in the case where conditions such as this case were established, black spots due to edge mercury aggregation occurred in the Okinawa area. However, since the coagulation was saturated and there was excess mercury, there was no shortage of mercury vapor in the lamp, and no symptom of failure occurred. Recently, considering the environmental impact of each company, the amount of enclosed mercury is less than 5 mg. Therefore, when all the enclosed mercury is aggregated at the end, excess mercury disappears and the mercury discharge cannot be maintained, and a symptom of emitting pink light due to Ar discharge is observed.

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

Although the details of the clear mechanism of the failure have not been clarified, the inventors have estimated that the clear mechanism of the failure is as follows.
1. Water 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 because deterioration of the waterproof packing due to repeated replacement of fluorescent lamps, deterioration over time, and permeation of salt water through the gap caused by a difference between manufacturers.
3. The infiltrated salt water is hard to evaporate due to the heat generated when the lamp is turned on, so that the metal shell 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 with the main body of the lighting fixture, which is grounded or substantially grounded, and is electrically connected to the outer surface of the glass tube of the waterproof socket portion.
5. The positive charge of mercury ions generated inside the lamp during lamp operation is electrically attracted to and adheres to the outer surface of the glass tube of the substantially waterproof socket portion of the lamp end.
6. Although it initially adheres as re-evaporable metallic mercury, it forms amalgam with sodium or the like which is a glass tube component, or becomes mercury oxide, which makes it difficult to contribute to discharge.
7. In this way, the amount of ineffective mercury that cannot be evaporated increases, and for example, in the case of a straight tube 40 W, mercury of several μg (about 1/1000 of the enclosed amount) necessary for mercury vapor discharge is contained in mercury contained in several mg. Even evaporation cannot be done. Here, there is a limit to the total amount of mercury attached to the portion corresponding to the waterproof socket, which is about 4 to 5 mg, and when more mercury is filled, the vaporizable liquid mercury is saturated in the tube. A sufficient amount to reach the mercury vapor pressure is surplus, and this problem is not observed in the first place.
8. The mercury vapor discharge cannot be maintained, and the Ar gas in which the insufficient discharge current is filled as a buffer gas contributes to the discharge and the discharge is maintained.
9. The discharge is maintained, but the emission of ultraviolet light from the mercury is reduced, so that the phosphor weakens the emission, and instead infrared or pink visible emission from the Ar discharge is observed.

There are the following as countermeasures against this problem.
Measures 1. Increase the amount of mercury in fluorescent lamps to the original level.
Measure 2. Do not illuminate with AC at commercial frequency or high frequency, but illuminate with DC.
Measure 3. Do not allow salty water to get under the waterproof packing.

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

The solution chosen by the inventors is as follows, rather than addressing it with a lamp with increased mercury and without changing to a DC lighting system.
Embodiment 1. Modify the equipment to add a windbreak tube.
Embodiment 2. Replace the lamp with a shatterproof type.
Embodiment 3. After covering both ends of the lamp and the socket with a shrink tube, heat shrink to improve moisture and water resistance.

Embodiment 1.
FIG. 4 and FIG. 5 are views showing a part of the lighting equipment of the first embodiment.
The lighting fixture includes a lighting fixture 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 has an instrument socket 21, a tubular packing 16, a windproof packing 17, and a waterproof cap 22.
The instrument socket 21 is formed with an annular annular recess 25 into which the windproof packing 17 is fitted, 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. 1. The waterproof cap 122 of the lighting fixture shown in FIGS. 4 and 5 has a different shape from the waterproof cap 22 shown in FIG.
The tubular packing 16 has an annular and tubular shape, and one end of the tubular packing 16 is fitted into the annular recess 25 of the instrument socket 21. The tubular packing 16 is made of rubber or silicon and is deformed by pressure.

The windproof packing 17 has an annular and tubular 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 tubular packing, and the inner periphery thereof contacts the outer periphery of the fluorescent lamp 10.
The cross-sectional shape of the windproof packing 17 in the direction of the central axis is convex, T-shaped, L-shaped, or Z-shaped. The middle of the windproof packing 17 has an annular step into which the inner circumference of the end of the windproof tube 30 is fitted.
The convex portion 28 at the tip of the outer periphery of the windproof packing 17 is press-fitted into the inner periphery of the tubular 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 circumference of the windproof packing 17, the bottom part 29 of the windproof packing 17 is adhered only to the glass tube 11 and the bottom part 29 is not extended to the mouthpiece 12. The electrical connection with 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, the effect of suppressing electrical connection between (the metallic shell of) the base 12 and the outer surface of the fluorescent tube (glass tube 11) is exerted.

  The windbreak tube 30 is a transparent or semi-transparent pipe that covers the glass tube 11 of the fluorescent lamp 10. The inner circumference of the end portion of the windbreak tube 30 is closely attached to the outer circumference of the annular step of the windbreak packing 17 to provide a waterproof effect.

  The waterproof cap 122 has an annular and tubular shape, and the female screw groove 27 is cut inside. The female screw groove 27 of the waterproof cap 122 is screwed into the male screw groove 26 of the instrument socket 21 while rotating, and the waterproof cap 122 fixes the tubular packing 16 to the instrument socket 21. The waterproof cap 122 has a different 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 and outer diameter as the tubular packing 16. 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 tubular packing 16. The ring 118 has an inner diameter and an outer diameter different from those of the ring 18 shown in FIGS.

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

The outer diameter of the tubular packing 16 is equal to the minimum inner diameter of the waterproof cap 122.
The inner diameter of the tubular 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 be press-fitted.
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 mouthpiece 12) or is slightly small enough to be press-fitted.
The female screw groove 27 of the waterproof cap 122 has the same pitch as the male screw groove 26 of the instrument socket 21.
The ring 118 has the same inner diameter and the same outer diameter as the tubular packing 16.

1. Removal Step The waterproof cap 22 shown in FIG. 2 is rotated to remove the waterproof cap 22 from the instrument socket 21. The waterproof cap 22 comes off on the right side 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 disappears, so that the adhesion between the rubber packing 23 and the fluorescent lamp 10 weakens as shown in FIG. Alternatively, 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 instrument socket 21, and the fluorescent lamp 10, the rubber packing 23, the ring 18, and the waterproof cap 22 are removed from the instrument body 100. The rubber packing 23, the ring 18 and the waterproof cap 22 are discarded since they are not used in 1 in this embodiment in the future.
At this point, only the instrument socket 21 of Figure 1 remains naked.

2. Attaching Step Next, the fluorescent lamp 10 is passed through the windbreak tube 30. The fluorescent lamp 10 may be a new one or may be 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. Turn it on. The windbreak tube 30 is cut in advance to a length such that the windproof packing 17 can be located 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 tubular 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 instrument socket 21 and the fluorescent lamp 10 is attached to the instrument socket 21.
Further, one end of the windproof packing 17 is fitted into the annular recess 25. Thus, the state shown in 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 tubular 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 tubular packing 16, the tubular packing 16 is deformed, and the entire outer circumference of the convex portion 28 of the windproof packing 17 is surrounded. Stick to.

As described above, the method for manufacturing a lighting fixture according to the first embodiment is a method for converting a lighting fixture with a waterproof socket into a lighting fixture with a waterproof socket and a windproof tube.
Retrofitting a windbreak tube to a lighting fixture with a waterproof socket requires the cost of selecting and obtaining parts and modifying the lighting fixture. In the first place, in order to make a lighting fixture with a windproof tube, the structure of the socket part is different from the lighting fixture with a waterproof socket (Fig. 1) that is currently in trouble, and it is a completely different model as a fixture, and its application 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 tubular packing 16, the windproof packing 17, A ring 118 having a structure different from that of FIG. 1, a waterproof cap 122 having a structure different from that of FIG. 1, and a windbreak tube 30 may be installed.

  Here, if the waterproofing caps are from the same manufacturer, the screw pitch may be the same. However, the design has been changed with the production time, and the waterproof cap 22 cannot always be used. In the first place, the purpose of using the windbreak tube 30 is irrelevant to windbreak, and is intended to prevent the water containing salt, which will be described later, from adhering to the vicinity of the end cap of the fluorescent lamp 10. The original wind-proof packing 17 of FIG. 1 was attached for this purpose, but its function is impaired due to deterioration and unexpected salt water permeation has occurred, so that the moisture from the wind-proof tube 30 has been lost. Quarantine is required.

  As described above, the lighting device according to the first embodiment is used in the salt-damaged area and its surroundings, and the islands other than Honshu and the islands south of Honshu or Okinawa and its neighboring islands are directly exposed to the sea breeze and are not rained. This is suitable when using the fluorescent lamp 10 installed under the eaves outdoors.

  The luminaire of the first embodiment is a luminaire in which a waterproof socket is used but a 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 main body of the luminaire of the fluorescent lamp 10 is substantially grounded.
Furthermore, the amount of mercury enclosed in the combined fluorescent lamp 10 is 5 mg or less.
The lighting device of the first embodiment is characterized in that the fluorescent lamp 10 of the lighting device is covered with a windbreak tube 30.

Embodiment 2.
FIG. 6 is a diagram showing a part of the lighting equipment of the second embodiment. A difference from FIG. 1 is that a scattering prevention tube 40 is provided on the outer periphery of the fluorescent lamp 10. The thickness of the shatterproof 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 an instrument socket 21, an electrode 14 arranged near the center of the glass tube 11 from the base 12, a base 12 and the glass tube 11. And a shatterproof tube 40 formed of a resin shrink tube covering the entire outer periphery of the.

  The shatterproof tube 40 does not have to be provided in the entire glass tube 11 and may be in the 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 method of manufacturing the lighting fixture for manufacturing the waterproof lighting fixture of FIG. 6 from the waterproof lighting fixture of FIG. 1 is as follows.
1. Removal Step The removal step operates in the same manner as in the first embodiment.
2. Attaching Step The fluorescent lamp 10 is passed through the shatterproof tube 40, and the shatterproof tube 40 is shrunk by hot air such as a dryer.

Next, the fluorescent lamp 10 covered with the shatterproof 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 instrument socket 21.
Next, the rubber packing 23 is attached to the annular recess 25.
Next, the waterproof cap 22 is screwed and attached to the instrument socket 21. 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 shatterproof tube 40, the waterproof effect is improved.

  The shatterproof fluorescent lamp 10 is more expensive and more expensive than a normal shatterproof tube-free fluorescent lamp. However, this 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 salt water permeation, and even if there is some salt water permeation, salt water and the base Since the contact with the metal part is suppressed, the occurrence of defects can be effectively suppressed.

  As described above, the lighting equipment 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 shatterproof tube 40 (resin shrink tube). And After the shatterproof tube 40 contracts, the shatterproof tube 40 covers the entire metal caps 12 at both ends of the fluorescent lamp 10. Further, the scattering prevention tube 40 is closely attached to the electrode surrounding portion 15 including the glass boundary between the base 12 and the base 12 and at least from the boundary to the electrode surrounding portion 15.

Embodiment 3.
FIG. 7 is a diagram showing a part of the lighting equipment of the third embodiment.
The difference from FIG. 1 is that a contraction tube 50 is provided around the waterproof cap 22 and the fluorescent lamp 10. The shrink tube 50 is a resin shrink tube.
The shrinkable tube 50 may cover the outer circumference of the glass tube 11 from the outer circumference of the end of the waterproof cap 22 to at least the surrounding portion of the electrode 14. However, the entire glass tube 11 may be coated, and if the entire glass tube 11 is coated, it has an effect of preventing scattering of the glass tube 11.

The method of manufacturing the lighting fixture for manufacturing 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 passed through the fluorescent lamp 10, and the fluorescent lamp 10 is passed through the contraction 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 instrument socket 21.
The rubber packing 23 is attached to the annular recess 25.
The waterproof cap 22 is screwed and attached to the instrument socket 21.

2. Covering step The shrink tube 50 is aligned with the waterproof cap 22 side so that the waterproof cap 22 and the glass tube 11 are covered, and the waterproof cap 22 is shrunk by hot air such as a dryer. After the contraction, as shown in FIG. 7, the contraction tube 50 covers the waterproof cap 22 and the glass tube 11.

  Shrinking with a dryer takes more time than mere lamp replacement, but salt water penetration can be suppressed by covering the instrument 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 by the shatterproof tube. It is characterized in that the moisture proof property between at least both ends of the lamp and the appliance socket 21 is enhanced.

*** Experimental examples of the first, second and third embodiments and their results ***
FIG. 8 shows an experimental example of the first, second and third embodiments and the result thereof.
The effect was confirmed by conducting the experiments of the first, second, and third embodiments at two locations in total, in Yomitan Village, Okinawa Prefecture, and Naha City, where the problem occurred. The lighting fixtures are all for FHF32 lamps and are high-frequency lighting fixtures for one and two lights (such as those manufactured by Mitsubishi Electric Lighting Co., Ltd.), and a waterproof packing (rubber packing 23) is installed in the fixture socket 21. A windproof tube was used. All of these lighting fixtures are installed under the same eaves in the same place. Lighting was at a rated voltage of 20 hours a day. This was continued and the occurrence of the phenomenon was confirmed, and the amount of mercury aggregated in the waterproof packing corresponding portion 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, and only mercury was collected and the amount of mercury was measured by weight. The mercury agglutination was visually confirmed.The symptom occurrence time was indicated by the lighting time of the earliest occurrence of the three defects, but it is considered that the earliest occurrence of the defects is due to the reproduction of the defects. Is.

In Comparative Examples 1 and 2, since the amount of mercury was 10 mg, no trouble occurred. In Comparative Example 1, there was no problem, but the rubber packing should be attached because it was originally a lighting fixture for outdoor use, and the problem could be avoided, but it was excluded from the effective implementation products.
Inconvenience example 1 is an example in which only the rubber packing 23 and the waterproof cap 22 are used at 60 Hz lighting, and a failure occurs.
Inconvenience example 2 is an example in which only the rubber packing 23 and the waterproof cap 22 are used with lighting at 45 kHz, and a failure has occurred.
In Comparative Example 4, no failure occurred, but since it was originally an outdoor lighting fixture, rubber packing should be attached, and the failure could be avoided, but it was excluded from the effective implementation products.
In Comparative Example 5, the DC lighting was performed, and the catalysis phenomenon occurred.

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

<< Confirmation of effects of Embodiments 1, 2 and 3 >>
In Okinawa, there are also cases where the shatterproof fluorescent lamp 10 is installed under an eaves and is used as a lighting fixture. Similarly, there are cases where equipment with a windbreak tube is installed. These problems do not occur. This problem occurs only in appliances that have not been subjected to them. Although we have confirmed these effects, we have to take measures to reduce the environmental load, etc., out of some possible countermeasures when this problem occurs in equipment that does not have these effects. The conclusion is that the above measures are good, even if they cost a little.

  As described above, according to the first, second, and third embodiments, the water content containing salt is electrically connected between the metal shell and the outer surface of the glass tube of the lamp body. Since this is effectively suppressed, mercury ions are prevented from aggregating in the portion corresponding to the waterproof packing, and this problem does not occur.

  Now that the mechanism of failure has been clarified, it is also known that the lighting equipment with a windbreak tube is useful in solving this saltwater penetration failure, although it is different from the original purpose of windbreak. That is, if the lighting fixture with the waterproof socket is discarded and all the lighting fixtures are replaced with the lighting fixture with the windproof tube, this problem can be solved. However, the new cost of replacing the luminaire and the environmental load of disposing of the luminaire with a waterproof socket that is still usable will be created.

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

  The first, second, and third embodiments may be combined. Further, in the first, second, and third embodiments, the case of the straight tube fluorescent lamp 10 has been described, but the present invention is not limited to the straight tube fluorescent lamp, and may be a single-ended die fluorescent lamp or a ring fluorescent lamp. Further, not only the fluorescent lamp but also other lamps, Embodiments 1, 2 and 3 can be applied in order to prevent the electric contact action between the base and the glass tube.

The luminaire of the above-described embodiment has a luminaire socket to which a lamp is attached, and the luminaire having an annular recess for fitting a rubber packing and a screw groove into which a waterproof cap is screwed is formed in the luminaire.
A tubular packing, one end of which is fitted into the annular recess of the instrument socket,
An annular windproof packing that fits inside the tubular packing and contacts the outer circumference of the lamp,
An end is attached to the outer circumference of the windproof packing, and a windproof tube that covers the circumference of the lamp,
It is characterized in that it is equipped with a waterproof cap screwed into the thread groove of the instrument socket and closely fitting the tubular packing to the windproof packing.

The lighting equipment of the above-described embodiment is
A lighting fixture body having a fixture socket;
Annular rubber packing,
A waterproof cap that is attached to the fixture socket and that fits the rubber packing around the lamp.
A glass tube, a mouthpiece provided at both ends of the glass tube and attached to an instrument socket, an electrode arranged near the center of the glass tube from the mouthpiece, and a resin shrink tube covering at least the outer periphery of the glass tube from the mouthpiece to the electrode surrounding portion. And a lamp having and.

The lighting equipment of the above-described embodiment is
A lighting fixture body having a fixture socket;
Annular rubber packing,
A waterproof cap that is attached to the fixture socket and that fits the rubber packing around the lamp.
A glass tube, a lamp provided at both ends of the glass tube and attached to an instrument socket, and a lamp having an electrode arranged near the center of the glass tube from the mouthpiece,
A resin shrink 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 is provided.

  The lighting fixtures described above should have a straight tube fluorescent lamp with an enclosed mercury content of 5 mg or less turned on at a commercial frequency by a magnetic ballast or at a high frequency by a high frequency lighting circuit, and the main body of the lighting fixture should be grounded. Is characterized by.

The method for manufacturing a lighting fixture according to the above-described embodiment has a fixture socket for mounting a lamp, and the fixture socket is for waterproofing in which an annular recess for fitting a rubber packing and a screw groove for screwing a waterproof cap are formed. In a method of manufacturing a lighting fixture for manufacturing a waterproof and windproof lighting fixture from the lighting fixture,
Insert one end of the annular tubular packing into the annular recess of the instrument socket,
Cover the lamp with a windbreak tube, and attach the end of the windbreak tube to the outer circumference of the annular rubber packing attached to the outer circumference of the lamp.
Insert the annular rubber packing into the inner circumference of the tubular packing,
It is characterized in that the waterproof cap is screwed into the thread groove of the instrument socket, and the tubular packing is brought into close contact with the rubber packing.

The method for manufacturing a lighting fixture according to the above-described embodiment is a method for manufacturing a lighting fixture for waterproofing,
Resin shrinkage on at least the outer circumference of the glass tube from at least the base of the lamp to the electrode surrounding portion of a lamp having a glass tube, caps attached to the instrument sockets provided at both ends of the glass tube, and electrodes arranged near the center of the glass tube Coat 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,
It is characterized in that a waterproof cap is attached to the appliance socket and a rubber packing is closely attached around the lamp.

The method for manufacturing a lighting fixture according to the above-described embodiment is a method for manufacturing a lighting fixture for waterproofing,
Pass the lamp through the resin shrink tube, annular waterproof cap, and annular rubber packing,
Attach the lamp to the instrument socket,
Attach the waterproof cap to the fixture socket, and put the rubber packing around the lamp,
It is characterized in that the resin shrink tube covers the glass tube outer periphery 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 tubular packing, 17 windproof packing, 18 ring, 19 black groove, 20 waterproof socket, 21 instrument socket, 22 waterproof cap, 23 rubber packing, 25 annular concave part, 26 male screw groove, 27 female screw groove, 28 convex part, 29 bottom part, 30 windproof tube, 40 shatterproof tube, 50 shrinkage tube, 100 instrument body, 118 ring, 122 waterproof cap.

Claims (4)

A translucent pipe arranged so as to cover the light source,
A tubular packing formed to correspond to the shape of the end portion in the axial direction of the pipe,
A cap arranged at an end portion in the axial direction with the packing in between, and a cap having an annular recess corresponding to the shape of the packing that faces the end portion of the packing,
The packing is
A first packing that is fitted into the annular recess, and a second packing that is arranged in close contact with the inside of the first packing and that is in close contact with the inner circumference of the pipe,
The cross-sectional shape of the second packing in the direction of the central axis has a convex portion whose outer peripheral tip is in close contact with the inner circumference of the first packing, and has an annular step on the middle side to fit the inner circumference of the end of the pipe. A lighting device that is shaped like a letter. A translucent pipe arranged so as to cover the light source,
A tubular packing formed to correspond to the shape of the end portion in the axial direction of the pipe,
A cap arranged at an end portion in the axial direction with the packing in between, and a cap having an annular recess corresponding to the shape of the packing that faces the end portion of the packing,
The packing is
A first packing that is fitted into the annular recess, and a second packing that is arranged inside the first packing and that is in close contact with the inner circumference of the pipe,
The first packings is deformed in a direction intersecting the axial direction of the pipe is pressurized in the axial Direction of the pipe, and in close contact with the entire outer periphery of the second packing,
The cross-sectional shape of the second packing in the direction of the central axis has a convex portion whose outer peripheral tip is in close contact with the inner peripheral surface of the first packing, and has an annular stepped portion that fits the inner peripheral surface of the end portion of the pipe in the middle side. A lighting device that is shaped like a letter. The packing is
The lighting device according to claim 1 or 2 , wherein a maximum outer dimension of a cross section orthogonal to the axial direction is larger than a maximum outer dimension of the pipe. The first packing is
Lighting device according to any one of claims 1 to 3, which is arranged outside the outer circumference of the pipe.

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