JPH1021716A - Lighting equipment - Google Patents

Abstract

(57) [Problem] To provide a lighting device capable of suppressing a decrease in irradiation efficiency and facilitating maintenance. When a high-pressure mercury lamp is turned on, visible light and ultraviolet light are emitted from the high-pressure mercury lamp. On the high pressure mercury lamp 11 side of the globe 12, the reflectance is reduced by the protective layer 17 having a smaller refractive index than the globe 12, so that
Irradiation efficiency can be improved. The ultraviolet rays that have reached the globe 12 are absorbed by the photocatalyst layer 19 to generate holes inside the TiO ₂ in the photocatalyst layer 19, and oxidize substances attached to the surface of the globe 12. In addition to deodorizing by odorous substances, oxidizing action disinfects or sterilizes various bacteria including bacteria, purifies dirt, and decomposes tobacco and oil and fat components to purify the environment. A reduction in the luminous flux irradiated through the globe 12 can be prevented, and the energy saving effect is obtained. Cleaning such as wiping the globe 12 is not required, and maintenance is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a lighting device having a photocatalytic layer.

[0002]

2. Description of the Related Art Conventionally, as an illumination device, there is an illumination device used outdoors where dirt easily adheres or an illumination device used indoors where smoke or odor of tobacco floats in an atmosphere.

[0003] In particular, this kind of lighting device used outdoors is
For example, dust or dirt is likely to adhere due to the presence of air pollutants such as CO ₂ (carbon dioxide) or NO _x (nitrogen oxide) contained in the exhaust gas of automobiles.

[0004] Further, since these lighting devices are mounted at a high place on a road or a dark place in a tunnel, cleaning and other maintenance when dust or dirt adheres require a cost.

On the other hand, in a lighting device used indoors, for example, cigarette tar and the like easily adhere.

[0006] In this case, too, maintenance cannot always be performed easily, and a device that is easy to maintain is also desired.

Therefore, a fluorescent lamp described in, for example, Japanese Patent Application Laid-Open No. 1-169866 is known as a device that oxidizes and decomposes deposits. This Japanese Patent Laid-Open Publication No. 1-169
In the lamp described in Japanese Patent Publication No. 866, mercury that emits ultraviolet light by negative glow discharge in a light-transmitting envelope is sealed, and TiO ₂ (oxidation), which is a photocatalytic substance, is formed on the surface of the envelope. (Titanium, Titania).

Then, mercury is ionized and excited by negative glow discharge to generate ultraviolet rays of 185 nm and 245 nm.
It deodorizes or deodorizes the surrounding atmosphere, decomposes organic components in the atmosphere, and the like.

That is, when light in a wavelength range having energy larger than the band gap (forbidden band) of a semiconductor is irradiated, electrons and holes of electrons are generated in the semiconductor, and an electron transfer reaction occurs. For example, TiO ₂ is about 3.0 eV
Semiconductor having a band gap of 410 nm and having an energy larger than this band gap.
When the following so-called ultraviolet rays are irradiated, electrons and electron holes (holes) are generated in TiO ₂ , and the movement of the holes causes an electron transfer reaction on the surface. In this electron transfer reaction, the holes have the power to pull out electrons corresponding to the energy of the band gap, that is, the oxidizing power, and the oxidizing power of the holes changes the substance attached or contacted to the surface of TiO _2. Let me.

[0010] As described above, since TiO ₂ generates a strong oxidizing power when exposed to ultraviolet rays, substances attached to the TiO ₂ surface, such as acetaldehyde, methyl mercaptan,
Since oxidation and decomposition of substances such as hydrogen sulfide and ammonia are promoted, cleaning with dust or dust due to air pollution or the like can be facilitated. In addition, TiO
_In No. ₂ , since the band gap slightly changes depending on the impurity concentration, a photocatalytic action may be caused by visible light of 410 nm or more.

On the other hand, as a lighting device having a photocatalytic function using a lamp for general lighting, for example, Japanese Patent Laid-Open No.
The configuration described in Japanese Patent Publication No. 04-2004 is described. In the configuration described in Japanese Patent Application Laid-Open No. 7-111104, a photocatalyst layer is formed on a cover provided to face the lamp by using ultraviolet rays emitted from the lamp.

[0012]

However, in the case of the structure described in JP-A-7-111104, the photocatalytic layer generally has a large refractive index, so that the irradiation efficiency is significantly higher than when the cover is not provided with a photocatalytic layer. There is a problem that the lighting function is deteriorated due to the deterioration.

According to the present invention, without decreasing the irradiation efficiency,
An object of the present invention is to provide a lighting device capable of facilitating maintenance.

[0014]

According to a first aspect of the present invention, there is provided a lighting device, comprising: a fixture body provided with a light source for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm; 300nm to 410
a light-transmitting cover that covers a light source through which at least a part of ultraviolet light in a wavelength region of nm can pass; a protective layer provided on the light source side of the light-transmitting cover and having a refractive index equal to or less than the refractive index of the light-transmitting cover; The light-transmitting cover has a photocatalyst layer provided on the side opposite to the light source and capable of transmitting visible light.

The light-transmitting cover is made of a glass material such as soda lime glass or quartz glass, a light-transmitting ceramic,
A material such as resin can be configured by adjusting the thickness and the like.

Since the refractive index of the protective layer is equal to or less than the refractive index of the light-transmitting cover, the light from the light source is efficiently transmitted to the light-transmitting cover without increasing the amount of light reflected by the light-transmitting cover. Then, the photocatalyst layer formed on the surface of the light-transmitting cover is irradiated with ultraviolet light from a light source, and the light-transmitting cover has a thickness of 300 n.
It transmits ultraviolet rays in the wavelength range of m to 410 nm to promote oxidation and decomposition of substances attached to the surface of the photocatalyst layer, purifies dust or dirt, and the photocatalyst layer and the translucent cover transmit visible light. Irradiates the irradiation target.

A lighting device according to a second aspect of the present invention includes: a light source for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm; A light-transmitting cover disposed on the instrument body and covering a light source capable of transmitting at least a part of ultraviolet light in a wavelength range of 300 nm to 410 nm;
A protective layer provided on the light source side of the light-transmitting cover and having a refractive index equal to or less than the refractive index of the light-transmitting cover; and a photocatalytic layer provided on the opposite side of the light-transmitting cover from the light source and capable of transmitting visible light. Is what you are doing.

Since the refractive index of the protective layer is equal to or less than the refractive index of the light-transmitting cover, the light from the light source is reflected by the light-transmitting cover in an increased amount. UV light is radiated from a light source to the photocatalyst layer formed on the surface of the light-transmitting cover without being efficiently transmitted through the light-transmitting cover.
The photocatalyst can be surely performed by transmitting ultraviolet light in the wavelength range of m, and the photocatalyst layer and the translucent cover can transmit visible light and illuminate the irradiation target.

A lighting device according to a third aspect of the present invention includes a light source for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm, and a device body provided with a translucent cover and attached to a moving object; A light-transmitting cover disposed on the apparatus main body and covering a light source capable of transmitting at least a part of ultraviolet light in a wavelength range of 300 nm to 410 nm; and a refractive index of the light-transmitting cover provided on the light source side of the light-transmitting cover. And a photocatalyst layer provided on the side opposite to the light source of the light-transmitting cover and capable of transmitting visible light.

Then, the light source is attached to the apparatus main body attached to the moving object, and since the refractive index of the protective layer is equal to or less than the refractive index of the translucent cover, the amount of the light from the light source reflected by the translucent cover is small. It is efficiently transmitted through the light-transmitting cover without increasing, and the photocatalytic layer formed on the surface of the light-transmitting cover,
The light source irradiates ultraviolet rays, and the translucent cover transmits at least a part of the ultraviolet rays in the wavelength range of 300 nm to 410 nm to reliably perform the photocatalyst, and the photocatalyst layer and the translucent cover transmit visible light. The illumination target can be illuminated.

According to a fourth aspect of the present invention, there is provided the lighting device according to any one of the first to third aspects, wherein the refractive index is provided between the light-transmitting cover and the photocatalytic layer and is equal to or less than the refractive index of the light-transmitting cover. Is provided.

The protective layer located between the light-transmitting cover and the photocatalytic layer not only prevents reflection but also prevents the light-transmitting cover from affecting the photocatalytic layer.

According to a fifth aspect of the present invention, in the lighting device according to any one of the first to fourth aspects, the protective layer is made of silicon oxide (SiO ₂ ) and aluminum oxide (Al ₂
O ₃ ) as a main component.

Since silicon oxide and aluminum oxide have small refractive indices, they reliably prevent reflection and prevent a decrease in irradiation efficiency.

According to a sixth aspect of the present invention, in the illuminating device according to any one of the first to fifth aspects, the photocatalytic layer formed on the outer surface of the translucent cover has a thickness of 0.01 μm.
To 0.5 μm.

The photocatalyst layer formed on the surface of the translucent cover has a thickness of 0.01 μm to 0.5 μm and transmits visible light through the translucent cover having the photocatalyst layer formed thereon for illumination. .

[0027] According to a seventh aspect of the present invention, there is provided the lighting device according to any one of the first to sixth aspects, wherein the photocatalytic layer, the light-transmitting cover and the protective layer are formed of visible light and 300 nm.
The transmittance of at least a part of ultraviolet light in the wavelength region of from 410 nm to 410 nm is 70% or more.

The transmittance of at least a part of visible light and at least a part of ultraviolet light in a wavelength region of 300 nm to 410 nm is not significantly reduced. The protective layer is made of, for example, S
Although those containing iO ₂ as a main component are applicable, the present invention is not limited to this as long as the transmittance of visible light and at least a part of ultraviolet light in the wavelength region of 300 nm to 410 nm is 70% or more.

It is to be noted that a hard glass such as borosilicate glass can be used as the light-transmitting cover having a transmittance of 70% or more of ultraviolet rays in a wavelength region of 300 nm to 410 nm, but is not limited thereto.

The lighting device according to claim 8 is the lighting device according to any one of claims 1 to 7, wherein the photocatalytic layer is
It is formed mainly of anatase crystalline TiO ₂ .

Then, oxidation and decomposition of a substance adhered to the surface of the photocatalyst layer containing TiO _{2 of} anatase crystal type as a main component are promoted, and dust or dust is further purified.

According to a ninth aspect of the present invention, in the illuminating device according to any one of the first to eighth aspects, the translucent cover is formed by using an acrylic resin as a main component.

Since the acrylic resin hardly absorbs ultraviolet rays, the photocatalytic action of the photocatalytic layer is ensured.

According to a tenth aspect of the present invention, there is provided the lighting device according to any one of the first to third aspects, further comprising a pole for supporting the fixture body.

And, it can be attached to a high place where maintenance is not easy by the pole which supports the instrument body.

[0036] According to an eleventh aspect of the present invention, in the illumination device according to any one of the first to tenth aspects, the light-transmitting cover is provided at a portion which is in contact with the instrument body side because it is supported by the instrument body. Denotes a portion where the photocatalyst layer is not formed.

Since a portion where the photocatalyst layer is not formed is formed in a portion in contact with the device main body to be supported by the device main body, the device main body is oxidized and reduced by the photocatalytic action of the photocatalyst layer. Not done.

According to a twelfth aspect of the present invention, in the illuminating device according to any one of the first to eleventh aspects, the illuminating device is provided between the light-transmitting cover and the instrument body in a watertight manner. The photocatalyst layer is not formed on the portion of the translucent cover that comes into contact with the packing.

The photocatalyst layer prevents the packing from being adversely affected, thereby preventing the watertightness from being reduced.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a lighting device according to the present invention will be described below with reference to a road lighting device shown in FIGS.

FIG. 1 is a longitudinal sectional view showing a road lighting device.
FIG. 2 is a perspective view, FIG. 3 is a rear view with a part thereof cut away, and FIG. 4 is a plan view. The road lighting device 1 shown in FIGS. Attached, for example, along a highway or general road.

The road lighting device 1 has an appliance main body 3 having a substantially elliptical planar shape, and pole support portions 4 for attaching to the pole 2 are formed at the base end of the appliance main body 3. ing. An opening 5 facing the lower surface is formed on the distal end side of the instrument main body 3, and a plurality of reflections for reflecting light irradiated toward the opening 5 toward the opening 5 are formed on the inner surface of the instrument main body 3. Plates 6, 7, and 7 are mounted, and a lamp socket 8 is mounted on the base end side of these reflection plates 6, 7, and 7 via a lamp socket mounting plate 9. A reflecting plate 10 that reflects light emitted toward the base end is attached. A high-pressure mercury lamp 11, which is an HID lamp as a light source, is detachably attached to the lamp socket 8.

The opening 5 has a substantially hemispherical shape and a wavelength of 300.
about 1.51 nm for light of 800 nm to 800 nm.
A glove 12 as a translucent cover made of soda lime glass is held by a frame 13 so that
Is attached by a hinge 14 provided on the device main body 3 at a base end side of the opening 5 at a latch 15.
The frame 13 is held by the instrument body 3 with the glove 12 and the frame 13 closing the opening 5. Furthermore, a packing 16 for sealing the frame 13 in a watertight manner with the frame 13 closed to the tool body 3 is attached to the tool body 3.

FIG. 5 is a cross-sectional view showing the state of the photocatalyst layer. The globe 12 transmits at least 80% of visible light and at least a part of ultraviolet rays in a wavelength range of 300 nm to 410 nm. S on both sides
Protective layers 17 and 18 having a thickness of about 0.5 μm and a refractive index of about 1.43 for light having a wavelength of 300 nm to 800 nm, which are mainly composed of fine particles of iO ₂ or Al ₂ O ₃ , are formed. On the non-opposing protective layer 18, the average particle size is 1 μm or less, preferably 0.05 μm to 0.1 μm.
A photocatalyst layer 19 mainly composed of ₂ μm anatase crystal type TiO ₂ fine particles and having a refractive index of about 1.9 to 21 for light having a wavelength of 300 nm to 800 nm is formed.

The method of forming the photocatalyst layer 19 is as follows. First, a titanium alcoholate solution is prepared by dissolving an organic titanium compound as a main component in a solvent such as alcohol, and then adding TiO having an average particle size of 5 to 50 nm to the solution. _2. Disperse and suspend the fine particles to prepare a suspension. After this suspension is applied to the gloved surface by the sol-gel method, it is baked at about 700 ° C. also for the strengthening treatment to form a photocatalytic layer in an anatase crystal form. Further, the film thickness is 0.01 to 0.5 μm, preferably 0.08 μm, which transmits 80% or more of visible light.
Of the photocatalyst layer 19. The method of forming the photocatalyst layer 19 is not limited to this, and the same effect can be obtained by using any method such as a CVD method or a spin coating method.

The transmittance is obtained by the following equation, for example.

That is, the incident radiation flux [W] is Φe,
Assuming that the transmitted radiation flux [W] is Φe τ, the transmittance τ = Φe τ
Assuming that / Φe or Φv is an incident light flux [lm] and a transmitted radiation flux [lm] is Φvτ, the transmittance τ = Φvτ / Φv.

The protective layers 17 and 18 are made of Me ₃
SiNHSiMe ₃ (hexamethyldisilazane), [M
e ₂ SiNH] ₃ (hexamethylcyclotrisilazane)
For example, it is immersed in a solution manufactured by Tonen Co., Ltd., pulled up and dried, and formed at a temperature of 80 ° C.

Further, the photocatalyst layer 19 has an average particle size of 0.05
The glove 12 is immersed in a suspension prepared by dispersing a TiO ₂ powder and a SiO ₂ powder of
It is applied to a thickness of 1 μm on the average, dried at 100 ° C. or more, preferably at 150 ° C. for about 5 minutes, and dried.

The photocatalyst layer 19 is made of, for example, Si (Et
O ₄ ) (tetraethoxysilane Et is an ethyl group)
The binder component material may be formed by forming a solution in a mixed turbid liquid of a hydrophilic solvent and a hydrophobic high-boiling solvent, and applying, drying, and firing a liquid in which photocatalytic fine particles are dispersed and suspended.

Further, a photocatalyst layer may be formed on a painted surface and a metal surface of the surface of the pole 2 and the tool body 3 and the like.

Next, the operation of the above embodiment will be described.

First, when the high-pressure mercury lamp 11 is turned on,
Visible light from the high pressure mercury lamp 11 and 300 nm to 41
Irradiation is performed with light containing ultraviolet light in a wavelength range of 0 nm.

The visible light and ultraviolet light from the high-pressure mercury lamp 11 are reflected by the reflectors 6, 7, 7, and 10, or directly reach the globe 12, and are irradiated downward through the globe 12, Brighten the lower part. Since the protective layer 17 having a refractive index smaller than the refractive index of the globe 12 is provided on the high-pressure mercury lamp 11 side of the globe 12, the reflectance is lower than in the case of the globe 12 alone.
Irradiation efficiency can be improved. Further, the protective layer 18 on the side opposite to the high-pressure mercury lamp 11 similarly reduces the reflectance and improves the irradiation efficiency, and also prevents sodium from being deposited from the globe 12 from adversely affecting the photocatalytic layer 19. It also has a function as a passivation film for prevention. On the other hand, by not forming the photocatalyst layer 19 on the high-pressure mercury lamp 11 side, internal reflection can be reduced and irradiation efficiency can be improved.

Further, since both the globe 12 and the photocatalyst layer 19 transmit 80% or more of visible light, irradiation is performed with sufficient brightness.

Further, the ultraviolet rays that have reached the globe 12 are absorbed by the photocatalyst layer 19, and generate holes inside TiO ₂ in the photocatalyst layer 19, and the holes generate electrons by an energy corresponding to a band gap of about 3.0 eV. Has an oxidizing power to oxidize substances attached to the surface of the globe 12. At this time, since the photocatalyst layer 19 transmits 80% or more of the ultraviolet rays from the high-pressure mercury lamp 11 in the wavelength range of 300 nm to 410 nm, the high-pressure mercury lamp
Odors or organic substances that exhibit catalytic activity by 11 and external light and contaminate the environment are more efficiently oxidized and decomposed, and the high-pressure mercury lamp 11 generates heat to promote oxidative decomposition.

That is, decomposition of sulfur oxides such as methylcaptan and hydrogen sulfide, nitrogen-containing compounds such as ammonia, and aldehydes attached to the glove 12 is promoted, and deodorization is also performed by decomposition of odorous substances. .

Further, by virtue of the strong oxidizing action, it is possible to sterilize or sterilize germs including bacteria and purify dirt and the like, for example, decompose oil and fat components in cigarettes, and purify the environment.

Therefore, even if dust and dirt such as oils and fats accumulate on the surface of the globe 12, such as oil and fat components, the adhesion of these substances is effectively prevented, and the luminous flux radiated through the globe 12. Can be prevented, the energy saving effect is obtained, cleaning such as wiping the glove 12 is not required, and maintenance is facilitated.

The photocatalyst layer 19 is not limited to TiO ₂ , but may be, for example, ZnO, WO ₃ , LaRhO ₃ , FeT
iO ₃ , Fe ₂ O ₃ , CdFe ₂ O ₄ , SrTiO ₃ ,
CdSe, GaAs, CaP, CeO ₂ , TbO ₂ , M
Fine particles of a compound or substance having a photocatalytic action such as gO, Er ₂ O ₃ or RuO ₂ , or a mixed system of two or more of these fine particles, and a mixture of zeolite and the like, and a binder component. The same effect can be obtained.

If a photocatalyst layer is formed on the painted surface of the pole 2 and the main body 3, the high-pressure mercury lamp 11
Light or external light such as sunlight is applied to the photocatalyst layer 19.
Irradiation with ultraviolet light of 7 μW / cm ² or more causes photocatalytic activity, and dirt hardly adheres to the pole 2 and the apparatus main body 3.
Cleaning is unnecessary, and the appearance is improved.

Further, since the film has good moisture proofing properties, the moisture resistance and the corrosion resistance are improved, and it absorbs ultraviolet rays, so that deterioration due to ultraviolet rays can be prevented.

Next, a second embodiment will be described with reference to FIGS.
This will be described with reference to the tunnel lighting device shown in FIG.

FIG. 6 is a perspective view showing a tunnel lighting device, FIG. 7 is a front view, and FIG. 8 is a partially cut-away side view. The tunnel lighting device shown in FIGS.
21 is arranged, for example, in a tunnel.

The tunnel lighting device 21 shown in FIGS. 6 to 8 has a hollow thin box rectangular parallelepiped fixture main body 22, an opening 23 is formed on the lower surface of the fixture main body 22, and a back face of the fixture main body 22. Is formed with a plate-like mounting leg 24 for mounting. In addition, a reflector 25 on a curved surface that reflects light emitted toward the opening 23 toward the direction of the opening 23 is attached to the inside of the instrument body 22, and one end of the reflector 25 in the longitudinal direction is attached to the reflector 25. A lamp socket 26 is mounted, and the lamp socket 26 has a visible light as a light source and 300 n.
A low-pressure sodium lamp 27 for irradiating light including ultraviolet rays in a wavelength range of m to 410 nm is detachably mounted. The same effect can be obtained by using a high-pressure sodium lamp that emits visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm instead of the low-pressure sodium lamp.

Further, a transparent cover made of flat soda lime glass is formed in the opening 23 so that visible light and 300 nm
An illumination cover 28 that transmits at least 80% or more of at least a part of ultraviolet rays in a wavelength range of 410 nm to 410 nm is held by a frame body 29 and is attached by a hinge 31 provided on one side of the opening 23 so as to be openable and closable. With the latch 32 provided on the other side, the frame body 29 is held by the appliance main body 22 with the illumination cover 28 and the frame body 29 closing the opening 23. Further, a packing 33 for sealing the frame 13 in a watertight manner with the frame 13 closed with the device main body 22 is attached to the device main body 22. As described in the first embodiment, a photocatalyst layer may be formed around the instrument body 22 to facilitate maintenance.

Further, on the outer surface side of the illumination cover 28, a protective layer and a photocatalyst layer are formed by lamination similarly to the case shown in FIG. 5 of the first embodiment.

The second embodiment has the same function and effect as the first embodiment by turning on the low-pressure sodium lamp 27 or by external light such as sunlight. In the second embodiment,
Since the low-pressure sodium lamp 27 is used, the low-pressure sodium lamp 27 emits orange visible light and 300 nm
Irradiation is performed with light containing ultraviolet light in the wavelength range of ４１０410 nm. Since the illumination cover 28 and the photocatalyst layer, both of which are transparent, transmit 80% or more of visible light, the illumination is performed with sufficient brightness and the illumination cover
Since 28 transmits at least a part of at least a part of the wavelength region of 300 nm to 410 nm by 80% or more, the photocatalyst layer of the illumination cover 28 can surely perform the photocatalyst and clean the illumination cover 28 to improve the irradiation efficiency. In this case, the lighting cover
On the low-pressure sodium lamp 27 side of 28, a protective layer having a refractive index smaller than that of the illumination cover 28 is provided.
Since the reflectance is lower than in the case where only the illumination cover 28 is used, the irradiation efficiency can be improved. Further, the protective layer on the opposite side of the low-pressure sodium lamp 27 similarly reduces the reflectance and improves the irradiation efficiency, and at the same time, the passivation for preventing sodium from depositing from the lighting cover 28 and adversely affecting the photocatalytic layer. It also has a function as a film. Therefore, even when the visible distance of the exhaust gas or fog in the tunnel is short, the visible distance can be extended to a relatively long distance, and the maintenance is reduced and the energy is saved.

Further, the third embodiment will be described with reference to the emergency parking zone lighting device shown in FIGS.

FIG. 9 is a perspective view showing an emergency parking zone illumination device, FIG. 10 is a front view, and FIG. 11 is a side view with a part cut away. The emergency parking zone shown in FIGS. The lighting device 41 is arranged, for example, in an emergency parking zone in a tunnel.

The emergency parking zone lighting device 41 shown in FIGS. 9 to 11 has a hollow elongated rectangular parallelepiped equipment main body 42, and an opening 43 is formed in the lower surface of the equipment main body 42, and the rear face of the equipment main body 42 is provided. Is formed with a plate-like mounting leg 44 for mounting. In addition, a plate-shaped reflecting plate 45 that reflects the light emitted facing the opening 43 toward the direction of the opening 43 is attached inside the appliance body 42, and at both ends in the longitudinal direction of the reflecting plate 45, respectively. Two pairs of lamp sockets 46, 46 facing each other are mounted.
Between 6, 46, visible light as light source and 300nm ~
Straight tube type fluorescent lamps 47, 47 for irradiating light including ultraviolet rays in a wavelength region of 410 nm are detachably mounted.
The same effect can be obtained by using an annular or compact fluorescent lamp instead of the straight tube fluorescent lamp. Further, as described in the first embodiment, a photocatalyst layer may be formed around the instrument body 42 to facilitate maintenance.

The fluorescent lamp 47 is filled with a rare gas such as mercury and an inert gas such as argon, and a fluorescent layer formed inside (not shown) is excited by ultraviolet rays emitted from the mercury to become visible. It is formed of a three-wavelength phosphor that converts light.

The three-wavelength phosphor is, for example, Y ₂ O ₃ : Eu ³⁺ as a red phosphor having a peak wavelength at around 610 nm, and (La, Ce) as a green phosphor having a peak wavelength at around 540 nm. , Tb) PO ₄ , 45
Ba as a blue phosphor having a peak wavelength near 0 nm
Mg ₂ Al ₁₆ O ₂₇ : Eu ²⁺ is used.

The phosphor layer has a thickness of 300 nm to 4 nm.
It may be formed by mixing an ultraviolet light emitting phosphor that converts to ultraviolet light within a wavelength range of 10 nm. The ultraviolet light-emitting phosphor has a mixing ratio of 1 to 10% by weight, and includes europium-activated alkaline earth metal borate, lead-activated alkaline earth silicate, europium-activated phosphate, and cerium-activated rare earth phosphorus. At least one kind of phosphor in which halogen is added to an acid salt or europium-activated alkaline earth metal borate is used. As the europium-activated alkaline earth metal nitrate, for example, SrB ₄ O ₇ : Eu ²⁺ having a peak wavelength at 368 nm is effective, and the lead-activated silicate has a peak length at 370 nm (Ba, Ba).
Sr, Mg) ₃ Si ₂ O ₇ : Pb ²⁺ , BaSi ₂ O ₅ : Pb ²⁺ having a peak wavelength at 350 nm, and the like are suitable, and europium-activated alkaline earth metal phosphate is preferably 38.
(SrMg) ₂ having a peak wavelength between 0 nm and 395 nm
P ₂ O ₇ : Eu ²⁺ or the like is effective. Further, as the cerium-activated rare earth phosphate, YPO ₄ : Ce ³⁺ having a peak wavelength near 357 nm is preferable.

It should be noted that the fluorescent lamp 47 is not limited to the three-wavelength emission type, and the same effect can be obtained by using a calcium halophosphate phosphor or another phosphor used.

The opening 43 has visible light as a light-transmitting cover made of a flat tempered glass and at least a part of ultraviolet rays within a wavelength range of 300 nm to 410 nm.
A lighting cover 48 that transmits 0% or more is held by a frame body 49 and is attached by a hinge 51 provided on one side of the opening 43 so as to be openable and closable. The frame 49 is held by the instrument body 42 with the cover 48 and the frame 49 closing the opening 43.

Further, on the outer surface side of the lighting cover 48, a protective layer and a photocatalyst layer are formed by lamination similarly to the case shown in FIG. 5 of the first embodiment.

The third embodiment also provides the same functions and effects as the first embodiment by turning on the fluorescent lamp 47 or by external light such as sunlight. In the third embodiment, since the fluorescent lamp 47 that emits visible light and ultraviolet light of three wavelengths is used, high color rendering properties can be obtained.

Further, the fourth embodiment will be described with reference to a tunnel guidance indicator as an illumination device shown in FIGS.

FIG. 12 is a front view showing a tunnel guidance indicator, and FIG. 13 is a plan view.
The tunnel guidance indicator light 61 shown in FIG. 1 is disposed in a tunnel, for example.

The tunnel guidance indicator light 61 shown in FIGS. 12 and 13 has a bracket-shaped appliance main body 62, and an opening 63 is formed on the front and rear surfaces of the appliance main body 62. A plate-like mounting leg 64 for mounting is formed. Also,
Two pairs of lamp sockets 65, 65, which are opposed to each other, are attached to both ends in the longitudinal direction in the apparatus main body 62. Between these lamp sockets 65, 65, visible light and 300 nm or less are used as a light source. A straight tube type fluorescent lamp 6 for irradiating at least a part of a wavelength region of 410 nm
6, 66 are detachably attached. The same effect can be obtained by using a ring-shaped or compact fluorescent lamp instead of the straight tube fluorescent lamp, and the three-wavelength light-emitting type or other fluorescent lamp shown in the third embodiment can be obtained. Is used. Further, as described in the first embodiment, a photocatalytic layer may be formed around the device main body 62 to facilitate maintenance.

The front and rear openings 63 are provided with a transparent cover made of flat-plated tempered glass as a transparent cover made of visible light and 300 nm.
A display panel 67 that transmits at least a part of ultraviolet rays in a wavelength region of about 410 nm of 80% or more is held by a frame 68 and opened.
The display panel is attached by a hinge 70 provided on the upper side of the opening 63 so that it can be opened and closed, and a latch 70 provided on the other side of the opening 63.
The frame 63 is held by the instrument body 62 with the opening 63 closed by the frame 67 and the frame 68.

The display panel 67 has characters such as pictograms or emergency exits formed on the inner surface side thereof using an ultraviolet-transparent silk printing ink (not shown), and the outer surface side is shown in FIG. 5 of the first embodiment. As in the case, the protective layer and the photocatalyst layer are laminated.

The fourth embodiment also provides the same functions and effects as the first embodiment by turning on the fluorescent lamp 66 or by external light such as sunlight. In the fourth embodiment, pictograms or characters are formed on the display panel 67. However, since the printing board is made of ultraviolet-permeable silk printing ink, ultraviolet rays are not absorbed, and Since the protective layer having a refractive index smaller than the refractive index of the display panel 67 is provided on the fluorescent lamp 66 side, the reflectance is lower than that of the display panel 67 alone, so that the irradiation efficiency can be improved. . further,
The protective layer on the side opposite to the fluorescent lamp 66 similarly reduces the reflectance to improve the irradiation efficiency, and serves as a passivation film for preventing sodium from depositing from the display panel 67 and adversely affecting the photocatalytic layer. It also has an effect. In addition, visible light and 300 nm to 410 n
The ultraviolet rays reach at least the photocatalyst layer by transmitting at least 80% of at least a part of the ultraviolet rays in the wavelength region of m, and do not disturb the function and effect shown in the first embodiment.

Next, a fifth embodiment will be described with reference to the evacuation pit lighting device shown in FIGS.

FIG. 14 is a front view showing a lighting device for an evacuation mine, and FIG. 15 is a side view.
The evacuation pit lighting device 81 shown in FIG. 1 is disposed, for example, in an evacuation pit drilled in parallel with a tunnel.

The lighting device 81 for an evacuation mine shown in FIGS. 14 and 15 has a box-shaped device main body 82.
A plate-shaped direct mounting bracket 83 for mounting is mounted on the upper surface of 82. A reflector 84 is attached to the lower surface of the appliance body 82, and a pair of opposed lamp sockets 85 is attached to both ends of the reflector 84 in the longitudinal direction. The light source includes a straight tube-type fluorescent lamp 86 detachably mounted as a light source for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm.
It is inserted into a tube 87 made of polycarbonate, which is a resin as a light-transmitting cover that transmits 80% or more of light containing at least a part of ultraviolet light in a wavelength region of nm to 410 nm. In addition, instead of a straight tube type fluorescent lamp,
The same effect can be obtained by using an annular or compact fluorescent lamp that irradiates visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm, and the visible light and the visible light shown in the third embodiment can be obtained. 300 nm
A three-wavelength emission type or other fluorescent lamp that irradiates light including ultraviolet rays within a wavelength region of from 410 nm to 410 nm is used.

A protective layer and a photocatalyst layer are formed on the outer surface of the tube 87 in the same manner as in the case of the first embodiment shown in FIG.

The fifth embodiment has the same function and effect as the first embodiment by turning on the fluorescent lamp 86 or by external light such as sunlight. In the fifth embodiment, the tube 87
Is made of resin, but the operation and effect shown in the first embodiment are not impeded even when resin is used.

The sixth embodiment will be described with reference to a projector as a lighting device shown in FIG.

FIG. 16 is a partially cutaway plan view showing a floodlight. The floodlight 91 shown in FIG. 16 is provided, for example, in a stadium.

The floodlight 91 shown in FIG. 16 has an instrument body 92 made of aluminum die-cast and having a curved surface. An opening 93 is formed in the front of the instrument body 92, and a starting pulse is provided on the back of the instrument body 92. Box in which the starter 94 that generates
A mounting body (not shown) for mounting to a lighting tower or the like is formed on the upper surface, and cooling fins 96 and 97 for cooling are formed on the back side. Also, the instrument body 92
A pair of lamp sockets 98 is attached near the rear side of the lamp. Between the lamp sockets 98, a short arc type lamp that irradiates visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm as a light source is provided. A high-intensity discharge lamp 99 is mounted. Also, the instrument body 92
On the inner surface, a reflector 100 having a rotating curved surface is mounted similarly to the appliance main body 92, including a high-intensity discharge lamp 99. Further, as described in the first embodiment, a photocatalyst layer may be formed around the instrument body 92 to facilitate maintenance.

The front opening 93 has a transparent soda-lime glass cover as a flat cover, which is made of visible light and 30% light.
An illumination cover 101 that transmits at least a part of ultraviolet rays in a wavelength range of 0 nm to 410 nm by 80% or more is held by a frame body 102 and is attached to an apparatus main body 92 so as to be openable and closable.

On the outer surface side of the illumination cover 101, a protective layer and a photocatalyst layer are formed in a laminated manner as in the case of the first embodiment shown in FIG.

The sixth embodiment also provides the same functions and effects as the first embodiment by turning on the high-intensity discharge lamp 99 or by external light such as sunlight. In particular, the illuminance of the projector, which is not easily maintained at a high place, is prevented from lowering, thereby improving the maintenance and exerting an energy saving effect.

The light projector is not limited to a runway approach light, an approach angle indicating light or an outdoor type, and the same effect can be obtained by using it for a theater spotlight or effect light.

Further, the seventh embodiment will be described with reference to an aviation obstruction light as an illumination device shown in FIG.

FIG. 17 is a partially cutaway plan view showing an aviation obstacle light. The aviation obstacle light 111 shown in FIG. 17 is provided in, for example, a high-rise building or a high-rise building.

The aviation obstruction light 111 shown in FIG. 17 has a hollow instrument main body 112, and a mounting surface 113 for mounting on a building or the like is formed on the base end side of the instrument main body 112, and is formed on the upper side. Is provided with a heat radiating hole 114. In addition, the instrument body
A cylindrical base 115 is mounted on the upper part of the base 112, and the inside of the base 115 and the heat radiating holes 114 are communicated with each other to form an air flow path.
116 are formed. In addition, a substrate
A light emitting diode 118 for irradiating red visible light is mounted on the substrate 117 as a large number of light sources. On the upper part of the instrument body 112, a transparent red cover 119 as a cylindrical plastic light-transmitting cover enclosing a light emitting diode 118 is detachably attached to the instrument body 112. And red cover 11
9, a protective layer and a photocatalyst layer are laminated on the outer surface side, as in the case shown in FIG. 5 of the first embodiment.
Further, as described in the first embodiment, a photocatalyst layer may be formed around the instrument body 112 to facilitate maintenance.

As the light source according to the seventh embodiment, a light source which outputs light including ultraviolet rays within a wavelength range of 300 nm to 410 nm is provided instead of the light emitting diode 118 or in addition to the light emitting diode 118. The light-transmitting cover may transmit at least 80% or more of at least a part of ultraviolet rays in a wavelength range of 300 nm to 410 nm.

The seventh embodiment also has the same functions and effects as the first embodiment due to external light such as sunlight.

Further, an eighth embodiment will be described with reference to a runway guide light as an illumination device shown in FIGS.

FIG. 18 is a cross-sectional view showing a runway guide light, and FIG. 19 is a plan view of the runway guide light. The runway guide lights 121 shown in FIGS. 18 and 19 are provided, for example, on an airport runway. I have.

The runway guide light 121 shown in FIGS. 18 and 19 has an aluminum die-cast equipment main body 122, which is provided in a hole 124 formed in the runway 123 or the like. It is stored in box 125. At the center of the instrument body 122, a halogen lamp 126 for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm is attached as a light source. Further, a pair of reflecting mirrors 127 are mounted opposite to the halogen lamp 126.

An aluminum die-cast cover 128 is removably attached to the upper surface of the instrument body 122 with screws (not shown), like the instrument body 122. An opening 129 is formed at a position corresponding to the visible light and at least a part of the ultraviolet light in the wavelength region of 300 nm to 410 nm as a transparent cover made of a block-shaped hard glass or soda lime glass. % Is attached. Then, on the outer surface side of the ring glass 130, similarly to the case shown in FIG. 5 of the first embodiment,
The protective layer and the photocatalyst layer are laminated. further,
As described in the first embodiment, a photocatalyst layer may be formed around the lid 128 to facilitate maintenance.

The eighth embodiment also provides the same functions and effects as the first embodiment by turning on the halogen lamp 126 or by external light such as sunlight. In particular, it is effective against dirt and the like due to contact with tires from an aircraft using the runway, and safety is improved without increasing maintenance.

The ninth embodiment will be described with reference to a headlight device as a lighting device shown in FIG.

FIG. 20 is a cross-sectional view showing a headlight device. The headlight device 141 shown in FIG. 20 is provided in an automobile.

The headlight device 141 shown in FIG.
Has a box-shaped appliance main body 142 with an open front surface, a unit case 143 is attached to the back of the appliance main body 142, a lamp socket 144 is mounted on the unit case 143, and the lamp socket 144 has A discharge lamp 145 for irradiating visible light and light including ultraviolet rays in a wavelength range of 300 nm to 410 nm as a light source is detachably mounted, and a reflector 146 for reflecting irradiation light from the discharge lamp 145 is mounted. I have.

A prism on the inner surface as a lens-shaped light-transmitting cover that transmits at least 80% of visible light and at least a part of ultraviolet rays in a wavelength range of 300 nm to 410 nm is provided on the front side opening of the instrument body 142. A headlight cover 147 formed with a hole is attached. A protective layer and a photocatalytic layer are formed on the outer surface of the headlight cover 147 in the same manner as in the case of the first embodiment shown in FIG.

The ninth embodiment also provides the same functions and effects as the first embodiment by turning on the discharge lamp 145 or by external light such as sunlight.

In this case, the headlight device is not limited to a headlight device having a general light source, a front glass having a reflecting mirror and a prism, but is a projector type headlight having a light source, a reflecting mirror, an aspheric lens and a front glass. The present invention may be applied to any of a device and a multi-reflector type lamp provided with a reflector and a front glass. Also, not limited to headlight devices, auxiliary lamps such as fog lamps, driving lamps or spot lamps, working lamps that are not allowed to be used during running, or small lamps, twilight lamps, cornering lamps, turn signal lamps, brake lamps, The same effect can be obtained by using either a parking lamp or a rotating lamp. Further, similar effects can be obtained even when used not only for automobiles but also for aircrafts, ships, and other moving objects.

In particular, when used for such a moving object, dirt such as exhaust gas on roads and other places is less likely to be attached, maintenance is improved, visibility is improved, and an energy saving effect is obtained.

Further, the tenth embodiment is shown in FIG.
23 will be described with reference to the corrosion-resistant tunnel lighting device shown in FIG.

FIG. 21 is a front view showing a tunnel lighting device, FIG. 22 is a side view, and FIG. 23 is a sectional view showing an attached state of a lighting cover. 151 is installed inside the tunnel.

The tunnel lighting device 151 shown in FIGS. 21 to 23 has corrosion resistance and has a stainless steel box-shaped fixture main body 152 having an open front surface. Is provided with a direct mounting bracket 153. A lid 154 is attached to the front opening of the appliance body 152 by a hinge 155 provided on the upper side so as to be openable and closable on the stainless steel lid 154 in the same manner as the appliance main body 152. The lid 154 is closed by the latch body 156 to the instrument body 152 in a watertight manner.

Then, a concave portion 164 projecting outward along the periphery of the irradiation opening 157 of the lid 154 is formed, and this concave portion is filled with a silicone rubber adhesive 165, and is formed on the rear side of the lid 154. Presses a soda lime glass lighting cover 159 as a light-transmitting cover from the rear side via a silicone rubber adhesive 166, spot-welds a holding plate 167 as a light-shielding member, and shields the silicon rubber from light by the holding plate 167. This is to prevent the photocatalyst layer near the packing 158 from being irradiated with ultraviolet rays from the high-pressure sodium lamp 161 and to prevent the packing 158 from being deteriorated by the photocatalytic action.
Therefore, the silicone rubber adhesives 165 and 166 are hardly corroded by the photocatalyst layer.

Further, the lamp socket 16 is provided in the fixture body 152.
0, and these lamp sockets 160 have visible light and 300 nm to 410 nm as light sources.
A high-pressure sodium lamp 161 of a single-die type for irradiating light including ultraviolet rays in the wavelength region of nm is detachably mounted. The high-pressure sodium lamp 161 is provided corresponding to the reflector 168 provided on the instrument body 152. At the same time, the cover 154 faces the lighting cover 159. Further, a ballast for starting and lighting the high-pressure sodium lamp 161 is housed in the appliance body 152, and a ballast box 162 is attached. In addition, a reflector (not shown) that is optically opposed to the high-pressure sodium lamp 161 is provided in the appliance main body 152.

Further, the periphery of the device main body 152 and the cover 154 may not only be simply painted, but also a photocatalytic layer may be formed to facilitate maintenance as described in the first embodiment.

The tenth embodiment also provides the same functions and effects as the first embodiment by turning on the high-pressure sodium lamp 161 or by external light such as sunlight.

FIG. 24 is a cross-sectional view showing an attached state of a lighting cover according to another embodiment. In the embodiment shown in FIG. 24, an irradiation opening 157 is formed at the center of a lid 154, and Visible light and 300 nm to 4 nm are applied to the irradiation opening 157 by a corrosion resistant packing 158 having an H-shaped cross section.
80 of at least some of the ultraviolet light in the wavelength region of 10 nm.
Lighting cover 159 as a translucent cover that transmits more than
Is mounted watertight. In addition, the first surface
As in the case of the embodiment shown in FIG. 5, a protective layer and a photocatalyst layer are laminated, but the protective layer and the photocatalyst layer are not provided in a portion in contact with the packing 158.
158 is not oxidized or reduced by the photocatalytic layer.

FIG. 25 is a cross-sectional view showing a state in which a lighting cover according to another embodiment is attached. In the embodiment shown in FIG. 25, a photocatalytic layer of a lighting cover 159 is formed on the front surface of an outer surface, and a packing 158 is provided. Silica (SiO ₂ )
And a protective portion 171 of alumina (Al ₂ O ₃ ) are formed,
The photocatalyst layer was protected.

FIG. 26 is a cross-sectional view showing an attached state of a lighting cover according to another embodiment. The embodiment shown in FIG. 26 is different from the embodiment shown in FIG. 24 or FIG. A light-shielding plate 172 as a light-shielding member is attached to the lid 154 by spot welding at a position between the packing 158 and the high-pressure sodium lamp 161 on the inner surface side of the high-pressure sodium lamp 161.
UV radiation from the
Is prevented from deteriorating due to photocatalysis.

It is possible. Therefore, also in this case, the photocatalyst can be reliably performed even by using an arbitrary lamp that does not emit ultraviolet light.

FIG. 27 is a cross-sectional view showing the state of attachment of this translucent cover. Then, as shown in FIG. 27, a watertight packing 175 is provided on the instrument body 42,
No photocatalyst layer is formed on the opposing illumination cover 48 of the packing 175, and a light-shielding brush 176 is provided on a portion of the instrument body 42 opposing the photocatalyst layer. Since the photocatalyst layer is not formed on the portion facing the packing 175, the packing 175 is not corroded by the activity of the photocatalyst, and can maintain watertightness for a long time.
If the photocatalyst layer has a packing
Even if it spreads between the inner surfaces where
Is not easily corroded. Further, since only a part of the tip of the brush 176 contacts the photocatalyst layer, it is hardly affected by the photocatalyst and is hardly corroded by the activity of the photocatalyst. The brush
The same effect can be obtained even if 176 itself is formed of a member which is hardly affected by the activity of the photocatalyst.

Furthermore, in any of the embodiments,
An interference filter may be attached. In this case, tantalum pentoxide may be used as the high refractive index material and silica may be used as the low refractive index material.

Further, although the description has been made using soda lime glass as the light-transmitting cover, the light-transmitting cover has a wavelength of 300 nm.
Refractive index for light of ８００800 nm is 1.48 to 1.50
The same effect can be obtained by using a translucent resin material such as a methyl methacrylate resin and an acrylic resin.

[0128]

EXAMPLES Next, the results of specifically evaluating the embodiments shown in FIGS. 21 to 23 as examples will be described.

A high-pressure sodium lamp 161 having a power of 360 W was used. As a control experiment, a protective layer and a photocatalyst layer were provided on the side of the lighting cover 15 opposite to the high-pressure sodium lamp 161.
Control 1 provided only in No. 9 and Control 2 not provided with a photocatalyst layer were similarly used.

Then, these three lighting devices were arranged in a tunnel, and the transmittance [%] as the initial irradiation efficiency and the transmittance [%] after three months were measured, as shown in Table 1. Results.

[0131]

[Table 1] That is, when the relative transmittance is calculated with the above embodiment as 100%, the control 1 provided with the protective layer and the photocatalyst layer only on the opposite side is 82%, and the control 2 without the photocatalyst layer is 74%. In the above-mentioned embodiment, the irradiation efficiency hardly decreases over time, and the irradiation efficiency can be maintained higher than those of the control 1 and the control 2.

[0132]

According to the illumination device of the first aspect, since the refractive index of the protective layer is equal to or less than the refractive index of the light-transmitting cover, the amount of light from the light source reflected by the light-transmitting cover increases. UV light is radiated from the light source to the photocatalyst layer formed on the surface of the light-transmitting cover, and the light-transmitting cover transmits the ultraviolet light in the wavelength range of 300 nm to 410 nm. As a result, oxidation and decomposition of the substance attached to the surface of the photocatalyst layer are promoted, dust and dirt are purified, and the photocatalyst layer and the light-transmitting cover allow visible light to pass through and irradiate the irradiation target.

According to the illumination device of the second aspect, the light from the light source is attached to the fixture body in which the light source is embedded, and the refractive index of the protective layer is equal to or less than the refractive index of the translucent cover. The light is efficiently transmitted through the light-transmitting cover without increasing the amount of light reflected by the light-transmitting cover. The optical cover transmits visible light and can illuminate the irradiation target.

According to the illumination device of the third aspect, the light source is attached to the fixture body attached to the moving object, and since the refractive index of the protective layer is equal to or less than the refractive index of the translucent cover, light from the light source is transmitted. The light is efficiently transmitted through the light-transmitting cover without increasing the amount of light reflected by the light-transmitting cover.
A photocatalyst can be reliably performed by transmitting at least a part of ultraviolet rays in a wavelength range of 0 nm to 410 nm,
The photocatalyst layer and the light-transmitting cover transmit visible light and can illuminate the irradiation target.

According to the illuminating device of the fourth aspect, in addition to the illuminating device of any one of the first to third aspects, the light-transmitting cover and the protective layer located between the photocatalytic layers are not only antireflection but also light-transmitting. The negative cover can be prevented from adversely affecting the photocatalyst layer.

According to the illuminating device of the fifth aspect, in addition to the illuminating device of any one of the first to fourth aspects, since silicon oxide and aluminum oxide have small refractive indices, reflection is surely prevented and irradiation is performed. A decrease in efficiency can be prevented.

According to the illumination device of the sixth aspect, in addition to the illumination device of any one of the first to fifth aspects, the thickness of the photocatalytic layer formed on the surface of the translucent cover is 0.01 μm.
Visible light can be transmitted and illuminated through a light-transmitting cover having a photocatalyst layer having a thickness of from 0.5 μm to 0.5 μm.

According to the illuminating device of the seventh aspect, in addition to the illuminating device of any one of the first to sixth aspects, the transmittance of at least a part of visible light and at least a part of ultraviolet light in a wavelength region of 300 nm to 410 nm is increased. Lowering can be prevented.

According to the illuminating device of the eighth aspect, in addition to the illuminating device of any one of the first to seventh aspects, it is also possible to oxidize a substance mainly composed of anatase crystalline TiO ₂ and adhered to the surface of the photocatalytic layer. It promotes decomposition and can further purify dust or dirt.

According to the illuminating device of the ninth aspect, in addition to the illuminating device of the first aspect, the acrylic resin hardly absorbs ultraviolet rays, so that the photocatalytic action of the photocatalytic layer can be ensured.

According to the illuminating device of the tenth aspect, in addition to the illuminating device of any one of the first to third aspects, it is possible to mount the device on a high place where maintenance is not easy by the pole for supporting the fixture body. .

According to the illuminating device of the eleventh aspect, in addition to the illuminating device of any one of the first to tenth aspects, a photocatalytic layer is provided at a portion which is supported by the appliance body and is in contact with the appliance body side. Since the portion not formed is formed, it is possible to prevent the device body from being oxidized and reduced by the photocatalytic action of the photocatalytic layer.

According to the illuminating device of the twelfth aspect, in addition to the illuminating device of the first aspect, a photocatalytic layer is not formed on a portion of the translucent cover that comes into contact with the packing, so that the photocatalytic layer is not formed. The layer can prevent the packing from being adversely affected and the watertightness from being reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a road lighting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a rear view in which a part is cut away.

FIG. 4 is a plan view of the same.

FIG. 5 is a sectional view showing a state of the photocatalyst layer in the same.

FIG. 6 is a perspective view showing a tunnel lighting device according to the second embodiment;

FIG. 7 is a front view of the same.

FIG. 8 is a side view in which a part of the same is cut away.

FIG. 9 is a perspective view showing the emergency parking zone lighting device of the third embodiment.

FIG. 10 is a front view of the same.

FIG. 11 is a side view in which a part is cut away.

FIG. 12 is a front view showing a tunnel guidance indicator of the fourth embodiment.

FIG. 13 is a plan view of the same.

FIG. 14 is a front view showing the evacuation pit lighting device of the fifth embodiment.

FIG. 15 is a side view of the same.

FIG. 16 is a partially cutaway plan view showing the light projector of the sixth embodiment.

FIG. 17 is a partially cutaway plan view showing an aviation obstruction light according to the seventh embodiment.

FIG. 18 is a sectional view showing a runway guide light according to the eighth embodiment.

FIG. 19 is a plan view of the same.

FIG. 20 is a sectional view showing the headlight device according to the ninth embodiment;

FIG. 21 is a front view showing the tunnel lighting device according to the tenth embodiment.

FIG. 22 is a side view of the same.

FIG. 23 is a sectional view showing an attached state of the lighting cover.

FIG. 24 is a cross-sectional view showing an attached state of a lighting cover according to another embodiment.

FIG. 25 is a cross-sectional view showing an attached state of a lighting cover according to another embodiment.

FIG. 26 is a cross-sectional view showing an attached state of a lighting cover according to still another embodiment.

FIG. 27 is a cross-sectional view showing a state where the light-transmitting cover is attached.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Road lighting device 2 Pole 3,22,42,62,82,92,112,122,142,152
Equipment 11 High-pressure mercury lamp as light source 12 Glove as translucent cover 17, 18 Protective layer 19 Photocatalytic layer 21, 151 Lighting device for tunnel 27 Low-pressure sodium lamp as light source 28, 48, 101, 159 Translucent cover Lighting cover 33,158 Packing 41 Emergency parking zone lighting device 47,66,86 Fluorescent lamp as light source 61 Tunnel guidance indicator light as lighting device 67 Display plate as translucent cover 81 Evacuation mine lighting device 87 Tube as a translucent cover 91 Floodlight as a lighting device 99 High intensity discharge lamp as a light source 111 Aviation obstruction light as a lighting device 118 Light emitting diode as a light source 119 Red cover as a translucent cover 121 Gliding as a lighting device Road guidance light 130 Ring glass as translucent cover 141 Headlight device as lighting device 145 Discharge lamp as light source 147 Translucent cover Shielding plate as high pressure sodium lamps 172 light shielding member as a head light cover 161 sources as

Claims (12)

[Claims] 1. Visible light and 300 nm to 410
an instrument body provided with a light source for irradiating light containing ultraviolet light in a wavelength range of nm; and a light-transmitting light source disposed on the instrument body and covering at least a part of ultraviolet light in a wavelength range of 300 nm to 410 nm. A light-transmitting cover; a protective layer provided on the light source side of the light-transmitting cover and having a refractive index equal to or lower than the refractive index of the light-transmitting cover; provided on the side opposite to the light source of the light-transmitting cover and capable of transmitting visible light. And a photocatalyst layer. 2. Visible light and 300 nm to 410.
a light source for irradiating light including ultraviolet rays in a wavelength range of nm and a light-transmitting cover, and an instrument body buried below a horizontal plane; and 300 nm to 410 n arranged in the instrument body.
a light-transmitting cover that covers a light source through which at least a part of ultraviolet light in the wavelength range of m can pass; a protective layer provided on the light source side of the light-transmitting cover and having a refractive index equal to or less than the refractive index of the light-transmitting cover;
A photocatalyst layer provided on the side of the translucent cover opposite to the light source and capable of transmitting visible light. 3. Visible light and 300 nm to 410.
a light source for irradiating light including ultraviolet rays in a wavelength region of nm and a light-transmitting cover, and an instrument body attached to a moving object; and 300 nm to 410 arranged on the instrument body.
a light-transmitting cover that covers a light source through which at least a part of ultraviolet light in a wavelength region of nm can pass; a protective layer provided on the light source side of the light-transmitting cover and having a refractive index equal to or less than the refractive index of the light-transmitting cover; A photocatalyst layer provided on the side of the translucent cover opposite to the light source and capable of transmitting visible light. 4. The light-emitting device according to claim 1, further comprising a protective layer provided between the light-transmitting cover and the photocatalytic layer and having a refractive index lower than that of the light-transmitting cover. The lighting device according to the above. 5. The lighting device according to claim 1, wherein the protective layer contains at least one of silicon oxide (SiO ₂ ) and aluminum oxide (Al ₂ O ₃ ) as a main component. 6. The lighting device according to claim 1, wherein the photocatalytic layer formed on the outer surface of the translucent cover has a thickness of 0.01 μm to 0.5 μm. 7. The photocatalytic layer, the translucent cover and the protective layer each have a transmittance of at least a part of visible light and at least a part of ultraviolet light in a wavelength range of 300 nm to 410 nm.
The lighting device according to claim 1, wherein the lighting device is 0% or more. 8. The photocatalytic layer is made of TiO of anatase crystal type.
The lighting device according to claim 1, wherein the lighting device is formed with ₂ as a main component. 9. The lighting device according to claim 1, wherein the translucent cover is formed by using an acrylic resin as a main component. 10. The lighting device according to claim 1, further comprising a pole for supporting the fixture body. 11. The light-transmitting cover has a portion where the photocatalytic layer is not formed in a portion which is supported by the device main body and is in contact with the device main body side. The lighting device according to any one of 1 to 10. 12. A packing provided between the light-transmitting cover and the tool body to make the light-transmitting cover and the tool body watertight, and a photocatalyst layer is provided on a portion of the light-transmitting cover that contacts the packing. The lighting device according to claim 1, wherein the lighting device is not formed.