JP3928744B2 - Lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a lighting device having a photocatalytic layer.
[0002]
[Prior art]
  Conventionally, as a lighting device, there are a lighting device used outdoors where dirt easily adheres, or a lighting device used indoors where cigarette smoke or odor floats in the atmosphere.
[0003]
  In particular, this type of illumination device used outdoors is, for example, CO contained in the exhaust gas of an automobile.₂(Carbon dioxide) or NO_xDue to the presence of air pollutants such as (nitrogen oxide), dust or dirt is likely to adhere.
[0004]
  In addition, since these lighting devices are attached to high places on roads or dark places in tunnels, they are expensive for cleaning and other maintenance when dust or dirt adheres.
[0005]
  On the other hand, the lighting device used indoors is liable to adhere, for example, cigarette dust.
[0006]
  Also in this case, maintenance cannot always be performed easily, and an easy maintenance is desired.
[0007]
  Therefore, for example, a fluorescent lamp described in Japanese Patent Application Laid-Open No. 1-169866 is known as an apparatus that oxidizes and decomposes deposits. The lamp described in Japanese Patent Laid-Open No. 1-169866 is a substance having a photocatalytic action on the surface of the envelope, in which mercury that emits ultraviolet rays is enclosed by negative glow discharge in the envelope having translucency. TiO₂A photocatalyst layer of (titanium oxide, titania) is formed.
[0008]
  Then, mercury is ionized and excited by negative glow discharge to generate ultraviolet rays of 185 nm and 245 nm. Upon receiving ultraviolet rays emitted from the mercury, deodorization or deodorization in the surrounding atmosphere and decomposition of organic components in the atmosphere And so on.
[0009]
  That is, when light in a wavelength region having energy larger than the band gap (forbidden band) of the semiconductor is irradiated, electrons and electron holes are generated in the semiconductor, causing an electron transfer reaction. For example TiO₂Is a semiconductor having a band gap of about 3.0 eV, and when irradiated with a so-called ultraviolet ray having a wavelength of 410 nm or less and having energy larger than the band gap, TiO₂Electrons and electron holes (through holes) are generated in the surface, and the movement of the holes causes an electron transfer reaction on the surface. In this electron transfer reaction, holes have a force for extracting electrons corresponding to the energy corresponding to the band gap, that is, an oxidizing power.₂The substance attached to or touching the surface of the surface is changed.
[0010]
  Thus, TiO₂TiO2 generates strong oxidizing power when exposed to ultraviolet rays, so TiO₂Oxidation and decomposition of substances adhering to the surface such as acetaldehyde, methyl mercabtan, hydrogen sulfide or ammonia are promoted, so that cleaning with dust or dirt due to air pollution can be facilitated. TiO₂Since the band gap slightly changes depending on the concentration of impurities, photocatalysis may occur with visible light of 410 nm or more.
[0011]
  On the other hand, as a lighting device with a photocatalytic function using a lamp for general lighting, for example, a configuration described in JP-A-7-111104 is described. In the configuration described in Japanese Patent Application Laid-Open No. 7-111104, a photocatalyst layer is formed on a cover provided opposite to a lamp using ultraviolet rays irradiated from the lamp.
[0012]
[Problems to be solved by the invention]
  However, the configuration described in JP-A-7-111104 is intended for deodorization, and it is unclear whether it has a sufficient dirt removal effect. In addition, when a general cover, for example, a light diffusive cover is used, the cover has a low ultraviolet transmittance, and a large amount of ultraviolet rays are absorbed or reflected, and a desired photocatalytic action cannot be obtained. Dirt due to adhesion of dust cannot be removed sufficiently.
[0013]
  On the other hand, when visible light from the lamp is absorbed by the photocatalyst layer, there is a problem that the illumination efficiency is impaired due to a significant decrease in irradiation efficiency.
[0014]
  An object of this invention is to provide the illuminating device which can make maintenance easy, without reducing irradiation efficiency.
[0015]
[Means for Solving the Problems]
  The illumination device according to claim 1, wherein the light source emits light including visible light and ultraviolet light in a wavelength region of 300 nm to 410 nm; and at least part of the ultraviolet light in the wavelength region of 300 nm to 410 nm and the transmittance of visible light. A translucent cover covering the light source at 80% or more; a photocatalytic layer formed on the outer surface of the translucent cover with a film thickness of 0.01 μm to 0.5 μm and having a visible light transmittance of 80% or more; An instrument body provided with a translucent cover;A packing provided between the translucent cover and the instrument main body and watertight between the translucent cover and the instrument main body;WithIt is characterized by being installed outdoorsIs.
[0016]
  The translucent cover can be configured by adjusting the thickness of a glass material such as soda lime glass and quartz glass, translucent ceramics, and resin so that the transmittance with visible light is 80% or more. .
[0017]
  The photocatalyst layer formed on the surface of the translucent cover is irradiated with ultraviolet rays from a light source, and the translucent cover has a transmittance of 80% or more of at least part of the ultraviolet rays in the wavelength region of 300 nm to 410 nm. It promotes oxidation and decomposition of substances adhering to the surface of the layer, purifies dust or dust, and the photocatalyst layer and the translucent cover have a visible light transmittance of 80% or more, so that the photocatalyst layer is formed. The light cover transmits visible light and irradiates it.
[0018]
  Visible light is transmitted and illuminated through the translucent cover in which the total thickness of the photocatalyst layer formed on the surface of the translucent cover is 0.01 μm to 0.5 μm and the photocatalyst layer is formed.
[0019]
  Claim2The lighting device as claimed in claim1In the illuminating device described above, the photocatalytic layer has a transmittance of at least part of visible light and ultraviolet rays in a wavelength region of 300 nm to 410 nm of 80% or more.Provided through the middle layerIs.
[0020]
  The possibility of detachment of the photocatalyst layer is eliminated without significantly reducing the transmittance of at least a part of visible light and ultraviolet light in the wavelength region of 300 nm to 410 nm. For example, the intermediate layer may be SiO₂However, the present invention is not limited to this as long as the transmittance of at least part of visible light and ultraviolet rays in the wavelength region of 300 nm to 410 nm is 80% or more.
[0021]
  Claim3The lighting device according to claim 1.Or 2In the described lighting device, the photocatalytic layer comprises anatase crystalline TiO₂Is formed as a main component.
[0022]
  Anatase crystal TiO₂It promotes the oxidation and decomposition of substances adhering to the surface of the photocatalyst layer with the main component of and thus further purifies dust or dust.
[0023]
  Claim4The illuminating device according to claim 1.3In any one of the lighting devices, the translucent cover has an ultraviolet transmittance of 80% or more in a wavelength region of 300 nm to 410 nm.
[0024]
  Since the translucent cover has an ultraviolet transmittance of 80% or more in a wavelength region of 300 nm to 410 nm, the ultraviolet light is surely transmitted to the photocatalyst layer on the surface, and the photocatalyst in the photocatalyst layer is ensured. In addition, although hard glass, such as a borosilicate glass, is applicable to the translucent cover whose transmittance | permeability of the ultraviolet-ray in the wavelength range of 300 nm thru | or 410 nm is 80% or more, for example, it is not restricted to this.
[0025]
  Claim5The illuminating device according to claim 1.4In any one of the lighting devices, the translucent cover is formed by using an acrylic resin as a main component.
[0026]
  Since the acrylic resin hardly absorbs ultraviolet rays, the photocatalyst by the photocatalyst layer is ensured.
[0027]
  Claim6The lighting device according to claim 1.5The lighting device according to any one of the above, includes a pole that supports the instrument body.
[0028]
  The pole that supports the instrument body can be attached to high places where maintenance is not easy.
[0029]
  Claim7The illuminating device according to claim 1.6In any one of the lighting devices, the translucent cover is a portion in which a photocatalyst layer is not formed in a portion that is in contact with the fixture main body so as to be supported by the fixture main body. .
[0030]
  Since the portion where the photocatalyst layer is not formed is formed in the portion that is in contact with the device main body so as to be supported by the device main body, the device main body is not oxidized or reduced by the photocatalytic action of the photocatalyst layer.
[0031]
  The lighting device according to claim 8 is the lighting device according to any one of claims 1 to 7,TransparencyThe photocatalyst layer is not formed on the portion of the light cover that contacts the packing, and the photocatalyst layer has an adverse effect on the packing and prevents the watertightness from being lowered.
[0032]
  The illuminating device according to claim 9 is a device according to claims 1 to.7In any one lighting device,TransparencyLight-shielding member that shields light to the part that contacts the packing of the optical coverTheThe photocatalytic action of the photocatalyst layer contacting the packing of the translucent cover is stopped, and the photocatalyst layer has an adverse effect on the packing and prevents water tightness from being lowered.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, a first embodiment of a lighting device according to the present invention will be described with reference to a road lighting device shown in FIGS.
[0034]
  1 is a longitudinal sectional view showing a road lighting device, FIG. 2 is a perspective view thereof, FIG. 3 is a rear view with a part cut away, and FIG. 4 is a plan view. The road lighting device 1 shown in FIG. 1 is attached to the tip of a pole 2 and is disposed along, for example, an expressway or a general road.
[0035]
  The road lighting device 1 has a substantially oval-shaped appliance main body 3, and pole support portions 4, 4 for attaching to the pole 2 are formed at the proximal end of the appliance main body 3. Moreover, the opening 5 toward the lower surface is formed on the distal end side of the instrument main body 3, and a plurality of reflections are provided on the inner surface of the instrument main body 3 to reflect the light emitted facing the opening 5 toward the opening 5. The plates 6, 7, 7 are attached, and a lamp socket 8 is attached to the base end side of these reflectors 6, 7, 7 via a lamp socket attachment plate 9. A reflector 10 that reflects the light irradiated to the base end side is attached. A high-pressure mercury lamp 11 that is an HID lamp as a light source is detachably attached to the lamp socket 8.
[0036]
  In addition, a glove 12 as a translucent cover made of a substantially hemispherical hard glass is held in a frame 13 and is attached to the opening 5 by a hinge 14 provided on the instrument body 3 on the distal end side of the opening 5. The frame body 13 is held by the instrument body 3 in a state where the globe 12 and the frame body 13 close the opening 5 by the latch 15 provided in the instrument body 3 on the proximal end side of the opening 5. Furthermore, a packing 16 is attached to the instrument body 3 to seal the frame 13 in a watertight manner while the frame 13 is closed by the instrument body 3.
[0037]
  FIG. 5 is a cross-sectional view showing the state of the photocatalyst layer. The globe 12 transmits 80% or more of visible light and at least a part of ultraviolet rays in the wavelength region of 300 nm to 410 nm, and is reflected on the surface of the globe 12. Is SiO₂An anatase type TiO having an average particle diameter of 1 μm or less, preferably 0.05 μm to 0.2 μm, through an intermediate layer 17 mainly composed of fine particles of₂A photocatalytic layer mainly composed of the fine particles is formed. A photocatalyst layer is formed by first preparing a titanium alcoholate solution by dissolving an organic titanium compound as a main component in a solvent such as alcohol, and then adding TiO with an average particle diameter of 5 to 50 nm to this solution.₂Fine particles are dispersed and suspended, and the suspension is prepared. After this suspension is applied to the globe surface, it is fired at about 600 ° C. to form a photocatalyst layer. The film thickness is 0.01 to 0.5 μm, preferably 0.08 μm, which transmits 80% or more of visible light.
[0038]
  The transmittance is obtained by the following equation, for example.
[0039]
  That is, assuming that the incident radiant flux [W] is Φe and the transmitted radiant flux [W] is Φe τ, the transmittance τ = Φe τ / Φe or Φv is the incident light flux [lm], and the transmitted radiant flux [lm] Is Φv τ, the transmittance τ = Φv τ / Φv.
[0040]
  In addition, the intermediate layer 17 uses Me as the starting material.₃SiNHSiMe₃(Hexamethyldisilazane), [Me₂SiNH]₃(Hexamethylcyclotrisilazane) For example, it is dipped in a solution made by Tonen Co., Ltd., dried, and formed at a temperature of 80 ° C.
[0041]
  Further, the photocatalyst layer 18 is made of TiO having an average particle diameter of 0.05 μm.₂Powder and SiO₂In a suspension prepared by dispersing the above powder in a mixed medium of butyl alcohol-butyl alcohol, the globe 12 is dipped and applied on the intermediate layer 17 to an average thickness of 1 μm, and is 100 ° C. or higher, preferably 150 ° C. Hold at about 5 minutes to dry and form.
[0042]
  The photocatalyst layer 18 is made of, for example, Si (EtO₄) (Tetraethoxysilane Et is an ethyl group), the binder component material is made into a solution in a mixed turbid solution of a hydrophilic solvent and a hydrophobic high boiling point solvent, and a solution in which photocatalyst fine particles are dispersed and suspended is applied, dried, and fired May be formed.
[0043]
  Furthermore, you may form a photocatalyst layer in the coating surface and metal surface of surfaces, such as the pole 2 and the instrument main body 3. FIG.
[0044]
  Next, the operation of the above embodiment will be described.
[0045]
  First, when the high-pressure mercury lamp 11 is turned on, the high-pressure mercury lamp 11 emits light including visible light and ultraviolet rays in a wavelength region of 300 nm to 410 nm.
[0046]
  These visible rays and ultraviolet rays 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 to brighten the lower portion. To do.
[0047]
  Moreover, since both the globe 12 and the photocatalyst layer 18 transmit 80% or more of visible light, irradiation is performed with sufficient brightness.
[0048]
  Furthermore, the ultraviolet rays that have reached the globe 12 are absorbed by the photocatalyst layer 18, and the TiO in the photocatalyst layer 18 is absorbed.₂A hole is generated inside the hole, and the hole has a force for extracting electrons by energy corresponding to a band gap of about 3.0 eV, that is, an oxidizing power, and oxidizes a substance attached to the surface of the globe 12. At this time, the photocatalyst layer 18 transmits 80% or more of ultraviolet rays in the wavelength region of 300 nm to 410 nm from the high pressure mercury lamp 11, so that the catalytic activity is exhibited by the high pressure mercury lamp 11 and external light to pollute the environment. The odor or organic matter is oxidized and decomposed more efficiently, and the oxidative decomposition action is promoted by the heat generated by the high-pressure mercury lamp 11.
[0049]
  That is, for example, decomposition of sulfur oxides such as methylcaptan and hydrogen sulfide, nitrogen-containing compounds such as ammonia, and aldehydes adhering to the globe 12 is accelerated, and deodorization is also performed by decomposition of odorous substances.
[0050]
  In addition, due to the strong oxidizing action, it is possible to sterilize or sterilize various germs including bacteria, purify dirt, etc., for example, by decomposing oil and fat components and the like, and purifying the environment.
[0051]
  Therefore, even if dust or dirt such as oil and fat components accumulate on the surface of the globe 12, these substances are effectively prevented from adhering and the luminous flux irradiated through the globe 12 is reduced. It can be prevented, has an energy saving effect, does not require cleaning such as wiping the glove 12, and is easy to maintain.
[0052]
  As the photocatalyst layer 18, TiO₂For example, ZnO, WO₃, LaRhO₃, FeTiO₃, Fe₂O₃, CdFe₂O₄, SrTiO₃, CdSe, GaAs, CaP, CeO₂, TbO₂, MgO, Er₂O₃Or RuO₂The same effect can be obtained even when formed with a fine particle of a compound or substance having a photocatalytic action such as a mixture system of these two or more fine particles, a mixture of zeolite, and a binder component. Can do.
[0053]
  If a photocatalyst layer is formed on the painted surface of the pole 2 and the instrument body 3, etc., 0.7 μW / cm is applied to the photocatalyst layer 18 by external light such as light from the high-pressure mercury lamp 11 or sunlight.₂When the above ultraviolet rays are irradiated, the photocatalytic activity is generated, and the dirt becomes difficult to adhere to the pole 2 and the instrument body 3, and the dirt is easily washed away particularly by rain, so that the cleaning becomes unnecessary and the aesthetic appearance is improved.
[0054]
  Furthermore, since the moisture resistance is good, the moisture resistance and corrosion resistance are improved, and ultraviolet rays are absorbed, so that deterioration due to ultraviolet rays can be prevented.
[0055]
  Next, a second embodiment will be described with reference to the tunnel illumination device shown in FIGS.
[0056]
  6 is a perspective view showing a tunnel lighting device, FIG. 7 is a front view, FIG. 8 is a side view with a part cut away, and the tunnel lighting device 21 shown in FIGS. Located in the tunnel.
[0057]
  The tunnel lighting device 21 shown in FIGS. 6 to 8 has a hollow thin box rectangular body 22, an opening 23 is formed on the lower surface of the body 22, and the rear surface of the body 22 is for mounting. A plate-like mounting leg 24 is formed. In addition, a reflection plate 25 on a curved surface that reflects the light emitted facing the opening 23 toward the direction of the opening 23 is attached in the instrument body 22, and one end side in the longitudinal direction of the reflection plate 25 is attached. A lamp socket 26 is attached, and a low-pressure sodium lamp 27 that irradiates light including visible light as a light source and ultraviolet rays in a wavelength region of 300 nm to 410 nm is detachably attached to the lamp socket 26. The same effect can be obtained by using a high-pressure sodium lamp that irradiates light including visible light and ultraviolet rays in the wavelength region of 300 nm to 410 nm instead of the low-pressure sodium lamp.
[0058]
  In addition, a light cover 28 that transmits 80% or more of visible light and at least a part of ultraviolet rays in the wavelength region of 300 nm to 410 nm is held in the frame 29 as a transparent cover made of tempered glass in the form of a flat plate. It is attached so as to be openable and closable by a hinge 31 provided on one side of the opening 23, and in a state where the lighting cover 28 and the frame 29 close the opening 23 in the latch 32 provided on the other side of the opening 23, A frame 29 is held by the instrument body 22. Furthermore, a packing 33 is attached to the instrument main body 22 to seal the frame 13 in a watertight manner while the frame 13 is closed by the instrument main body 22. As described in the first embodiment, a photocatalyst layer may be formed around the instrument body 22 to facilitate maintenance.
[0059]
  Further, an intermediate layer and a photocatalyst layer are laminated on the outer surface side of the illumination cover 28 as in the case of the first embodiment shown in FIG.
[0060]
  The second embodiment also exhibits the same operations and effects 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 light including orange visible light and ultraviolet light in the wavelength region of 300 nm to 410 nm. Since both the illumination cover 28 and the photocatalyst layer transmit 80% or more of visible light, the illumination cover 28 irradiates with sufficient brightness, and the illumination cover 28 covers at least part of the wavelength region of 300 nm to 410 nm by 80% or more. Since the light is transmitted, the photocatalyst can be surely performed by the photocatalyst layer of the illumination cover 28, and the illumination cover 28 can be cleaned to improve the irradiation efficiency. Therefore, even when the viewing distance such as exhaust gas or fog in the tunnel is short, the viewing distance can be increased to a relatively long distance, and maintenance can be reduced and energy can be saved.
[0061]
  Further, a third embodiment will be described with reference to an emergency parking zone illumination device shown in FIGS.
[0062]
  9 is a perspective view showing an emergency parking zone illumination device, FIG. 10 is a front view, FIG. 11 is a side view with a part cut away, and the emergency parking zone illumination device shown in FIGS. 41 is arranged, for example, in an emergency parking zone in the tunnel.
[0063]
  The emergency parking belt illumination device 41 shown in FIGS. 9 to 11 has a hollow elongated rectangular parallelepiped device body 42, an opening 43 is formed on the lower surface of the device body 42, and is attached to the back surface of the device body 42. A plate-shaped mounting leg 44 is formed. In addition, a plate-like reflecting plate 45 that reflects the light irradiated facing the opening 43 toward the direction of the opening 43 is attached in the instrument main body 42, and both ends of the reflecting plate 45 in the longitudinal direction are respectively attached. Two paired lamp sockets 46 and 46 are attached to face each other, and light including visible light and ultraviolet light in a wavelength region of 300 to 410 nm is irradiated between the lamp sockets 46 and 46 as a light source. Straight tube fluorescent lamps 47 and 47 are detachably attached. Note that the same effect can be obtained by using a circular 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.
[0064]
  The fluorescent lamp 47 is filled with an inert gas such as mercury and argon, and a phosphor layer formed inside is not shown and is excited by ultraviolet rays emitted from the mercury to be converted into visible light. It is made of a three-wavelength phosphor.
[0065]
  This three-wavelength phosphor is, for example, Y as a red phosphor having a peak wavelength near 610 nm.₂O₃: Eu³⁺(La, Ce, Tb) PO as a green phosphor having a peak wavelength near 540 nm₄BaMg as a blue phosphor having a peak wavelength around 450 nm₂Al₁₆O₂₇: Eu²⁺Is used.
[0066]
  Note that the phosphor layer may be formed by mixing an ultraviolet light emitting phosphor that converts ultraviolet light within a wavelength region of 300 nm to 410 nm. Further, 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 or more phosphors obtained by adding halogen to an acid salt or europium-activated alkaline earth metal borate are used. As the europium-activated alkaline earth metal nitrate, for example, SrB having a peak wavelength at 368 nm₄O₇: Eu²⁺Is effective and has a peak length at 370 nm as a lead-activated silicate (Ba, Sr, Mg)₃Si₂O₇: Pb²⁺BaSi with a peak wavelength at 350 nm₂O₅: Pb²⁺The europium-activated alkaline earth metal phosphate has a peak wavelength at 380 nm to 395 nm (SrMg)₂P₂O₇: Eu²⁺Etc. are effective. As cerium-activated rare earth phosphate, YPO having a peak wavelength near 357 nm is used.₄: Ce³⁺Etc. are suitable.
[0067]
  The fluorescent lamp 47 is not limited to the three-wavelength light emitting type, and the same effect can be obtained by using a calcium halophosphate phosphor or a phosphor used for others.
[0068]
  In addition, the opening 49 has an illumination cover 48 that transmits 80% or more of visible light as a transparent cover made of flat tempered glass and at least part of ultraviolet rays in the wavelength region of 300 nm to 410 nm. It is held so that it can be opened and closed by a hinge 51 provided on one side of the opening 43, and the illumination cover 48 and the frame body 49 close the opening 43 by a latch 52 provided on the other side of the opening 43. The frame 49 is held by the instrument body 42.
[0069]
  Further, on the outer surface side of the illumination cover 48, an intermediate layer and a photocatalyst layer are laminated as in the case shown in FIG. 5 of the first embodiment.
[0070]
  And this 3rd Embodiment also has the same operation and effect as a 1st embodiment by lighting fluorescent lamp 47 or external light, such as sunlight. In the third embodiment, since the fluorescent lamp 47 that emits visible light and ultraviolet light having three wavelengths is used, high color rendering is also obtained.
[0071]
  Furthermore, a fourth embodiment will be described with reference to a tunnel guide indicator lamp as the illumination device shown in FIGS.
[0072]
  FIG. 12 is a front view showing a tunnel guide indicator lamp, and FIG. 13 is a plan view. The tunnel guide indicator lamp 61 shown in FIGS. 12 and 13 is disposed in a tunnel, for example.
[0073]
  The tunnel guide indicator lamps 61 shown in FIG. 12 to FIG. 13 have a mouthpiece-like instrument main body 62, an opening 63 is formed on the front and rear surfaces of the instrument main body 62, and the upper surface of the instrument main body 62 is for mounting. A plate-like mounting leg 64 is formed. Further, two lamp sockets 65, 65 that are opposed to each other are attached to both ends in the longitudinal direction in the instrument main body 62, and between these lamp sockets 65, 65, visible light and Straight tube fluorescent lamps 66 and 66 that irradiate at least a part of the wavelength region of 300 nm to 410 nm are detachably attached. The same effect can be obtained by using a circular or compact fluorescent lamp in place 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 photocatalyst layer may be formed around the instrument body 62 to facilitate maintenance.
[0074]
  Further, a display plate 67 that transmits at least 80% of visible light and at least part of ultraviolet rays in a wavelength region of 300 nm to 410 nm as a flat tempered glass transparent cover is provided in the front and rear openings 63 as a frame body 68. Is attached to be able to be opened and closed by a hinge 69 provided on the upper side of the opening 63, and the display panel 67 and the frame body 68 close the opening 63 by a latch 70 provided on the other side of the opening 63. The frame 63 is held by the instrument body 62.
[0075]
  The display board 67 is formed with characters such as pictograms or emergency exits on the inner surface side by ultraviolet transmissive silk printing ink (not shown), and the outer surface side is the same as that shown in FIG. 5 of the first embodiment. In addition, an intermediate layer and a photocatalyst layer are laminated.
[0076]
  The fluorescent lamp 47 is filled with an inert gas such as mercury and argon, and a phosphor layer formed inside is not shown and is excited by ultraviolet rays emitted from the mercury to be converted into visible light. And a mixture of a three-wavelength phosphor that emits light and an ultraviolet light-emitting phosphor that converts ultraviolet light within a wavelength region of 300 nm to 410 nm.
[0077]
  The three-wavelength phosphor is, for example, (Y.Gd) BO as a red phosphor having a peak wavelength near 616 nm.₃: Eu, CaPO as a green phosphor having a peak wavelength around 540 nm₄BaMgAl as a blue phosphor having a peak wavelength around 450 nm₁₄O₂₃: Eu is used.
[0078]
  In addition, the ultraviolet light emitting phosphor has a mixing ratio of 1 to 10% by weight, and europium-activated alkaline earth metal nitrate, lead-activated silicate, europium-activated alkaline earth metal aluminate, or halogen added thereto At least one of the phosphors used is used. As the europium activated alkaline earth metal nitrate, for example, Sr having a peak wavelength at 368 nm₂B₂O₇: Eu²⁺Is effective and has a peak length at 370 nm as a lead-activated silicate (BaSrMg)₃SiO₇: Pb²⁺BaSi with a peak wavelength at 350 nm₂O₅: Pb²⁺The europium-activated alkaline earth metal aluminate having a peak wavelength of 358 nm to 360 nm is effective.
[0079]
  The fluorescent lamp 47 is not limited to the three-wavelength light emitting type, and the same effect can be obtained by using a calcium halophosphate phosphor or a phosphor used for others.
[0080]
  In addition, the opening 49 has an illumination cover 48 that transmits 80% or more of visible light as a transparent cover made of flat tempered glass and at least part of ultraviolet rays in the wavelength region of 300 nm to 410 nm. It is held so that it can be opened and closed by a hinge 51 provided on one side of the opening 43, and the illumination cover 48 and the frame body 49 close the opening 43 by a latch 52 provided on the other side of the opening 43. The frame 49 is held by the instrument body 42.
[0081]
  Further, on the outer surface side of the illumination cover 48, an intermediate layer and a photocatalyst layer are laminated as in the case shown in FIG. 5 of the first embodiment.
[0082]
  And this 3rd Embodiment also has the same operation and effect as a 1st embodiment by lighting fluorescent lamp 47 or external light, such as sunlight. In the third embodiment, since the fluorescent lamp 47 that emits visible light and ultraviolet light having three wavelengths is used, high color rendering is also obtained.
[0083]
  Furthermore, a fourth embodiment will be described with reference to a tunnel guide indicator lamp as the illumination device shown in FIGS.
[0084]
  FIG. 12 is a front view showing a tunnel guide indicator lamp, and FIG. 13 is a plan view. The tunnel guide indicator lamp 61 shown in FIGS. 12 and 13 is disposed in a tunnel, for example.
[0085]
  The tunnel guide indicator lamps 61 shown in FIG. 12 to FIG. 13 have a mouthpiece-like instrument main body 62, an opening 63 is formed on the front and rear surfaces of the instrument main body 62, and the upper surface of the instrument main body 62 is for mounting. A plate-like mounting leg 64 is formed. Further, two lamp sockets 65, 65 that are opposed to each other are attached to both ends in the longitudinal direction in the instrument main body 62, and between these lamp sockets 65, 65, visible light and Straight tube fluorescent lamps 66 and 66 that irradiate at least a part of the wavelength region of 300 nm to 410 nm are detachably attached. The same effect can be obtained by using a circular or compact fluorescent lamp in place 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 photocatalyst layer may be formed around the instrument body 62 to facilitate maintenance.
[0086]
  Further, a display plate 67 that transmits at least 80% of visible light and at least part of ultraviolet rays in a wavelength region of 300 nm to 410 nm as a flat tempered glass transparent cover is provided in the front and rear openings 63 as a frame body 68. Is attached to be able to be opened and closed by a hinge 69 provided on the upper side of the opening 63, and the display panel 67 and the frame body 68 close the opening 63 by a latch 70 provided on the other side of the opening 63. The frame 63 is held by the instrument body 62.
[0087]
  The display board 67 is formed with characters such as pictograms or emergency exits on the inner surface side by ultraviolet transmission type silk printing ink (not shown), and the outer surface side is the same as that shown in FIG. 5 of the first embodiment. In addition, an intermediate layer and a photocatalyst layer are laminated.
[0088]
  And this 4th Embodiment also has the effect | action and effect similar to 1st Embodiment by lighting the fluorescent lamp 66 or external light, such as sunlight. In the fourth embodiment, pictograms or characters are formed on the display board 67. However, since the silk printing ink is transmissive to ultraviolet rays, ultraviolet rays are not absorbed and visible light and 300 to 410 nm are absorbed. The ultraviolet rays reach the photocatalyst layer by transmitting at least 80% of at least some of the ultraviolet rays in the wavelength region, and the operation and effect shown in the first embodiment are not hindered.
[0089]
  Further, a fifth embodiment will be described with reference to an evacuation tunnel illumination device shown in FIGS.
[0090]
  FIG. 14 is a front view showing an evacuation mine lighting device, and FIG. 15 is a side view. The evacuation mine lighting device 81 shown in FIGS. 14 and 15 is arranged, for example, in an evacuation pit drilled in parallel with a tunnel. It is installed.
[0091]
  14 and 15 has a box-shaped instrument main body 82, and a plate-shaped direct fitting 83 for attachment is attached to the upper surface of the instrument main body 82. A reflector 84 is attached to the lower surface of the fixture body 82, and a pair of opposing lamp sockets 85 are attached to both ends of the reflector 84 in the longitudinal direction. A straight tube type fluorescent lamp 86 that irradiates visible light and light including ultraviolet rays in the wavelength range of 300 nm to 410 nm as a light source is detachably attached. The fluorescent lamp 86 is visible light and has 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 translucent cover that transmits 80% or more of at least some of the ultraviolet rays. The same effect can be obtained by using an annular or compact fluorescent lamp that irradiates light including visible light and ultraviolet rays in the wavelength region of 300 nm to 410 nm instead of the straight fluorescent lamp. A three-wavelength light emitting type or other fluorescent lamp that irradiates light including visible light and ultraviolet light in a wavelength region of 300 nm to 410 nm shown in the third embodiment is used.
[0092]
  And the intermediate | middle layer and the photocatalyst layer are laminated | stacked and formed on the outer surface side of the tube 87 similarly to the case shown in FIG. 5 of 1st Embodiment.
[0093]
  The fifth embodiment also exhibits the same operations and effects 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 even when resin is used, the operation and effect shown in the first embodiment are not hindered.
[0094]
  In addition, a sixth embodiment will be described with reference to a projector as an illumination device shown in FIG.
[0095]
  FIG. 16 is a plan view in which a part of the projector is cut out, and the projector 91 shown in FIG. 16 is disposed in a stadium, for example.
[0096]
  The projector 91 shown in FIG. 16 has a rotary curved instrument body 92 made of aluminum die cast, an opening 93 is formed on the front surface of the instrument body 92, and a starting pulse is generated on the back surface of the instrument body 92. A box 95 in which a starter 94 is accommodated is attached, and an evacuation shaft lighting device 81 shown in FIG. 14 and FIG. 15 is disposed on an upper surface in, for example, an evacuation shaft drilled parallel to the tunnel.
[0097]
  14 and 15 has a box-shaped instrument main body 82, and a plate-shaped direct fitting 83 for attachment is attached to the upper surface of the instrument main body 82. In addition, a reflector 84 is attached to the lower surface of the fixture body 82, and a pair of lamp sockets 84 are attached to opposite ends of the reflector 84 in the longitudinal direction. A straight tube type fluorescent lamp 86 that irradiates visible light and light including ultraviolet rays in the wavelength range of 300 nm to 410 nm as a light source is detachably attached. The fluorescent lamp 86 is visible light and has 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 translucent cover that transmits light including ultraviolet rays. The same effect can be obtained by using an annular or compact fluorescent lamp that irradiates light including visible light and ultraviolet rays in the wavelength region of 300 nm to 410 nm, instead of the straight fluorescent lamp 86. A three-wavelength light emitting type or other fluorescent lamp that irradiates light including visible light and ultraviolet light in the wavelength region of 300 nm to 410 nm shown in the third embodiment can be used.
[0098]
  And the intermediate | middle layer and the photocatalyst layer are laminated | stacked and formed on the outer surface side of the tube 87 similarly to the case shown in FIG. 5 of 1st Embodiment.
[0099]
  The fifth embodiment also exhibits the same operations and effects 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 even when resin is used, the operation and effect shown in the first embodiment are not hindered.
[0100]
  In addition, a sixth embodiment will be described with reference to a projector as an illumination device shown in FIG.
[0101]
  FIG. 16 is a plan view in which a part of the projector is cut out, and the projector 91 shown in FIG. 16 is disposed in a stadium, for example.
[0102]
  The projector 91 shown in FIG. 16 has a rotary curved instrument body 92 made of aluminum die cast, an opening 93 is formed on the front surface of the instrument body 92, and a starting pulse is generated on the back surface of the instrument body 92. A box 95 in which a starter 94 is accommodated is attached, and an evacuation shaft lighting device 81 shown in FIG. 14 and FIG. 15 is disposed on an upper surface in, for example, an evacuation shaft drilled parallel to the tunnel.
[0103]
  14 and 15 has a box-shaped instrument main body 82, and a plate-shaped direct fitting 83 for attachment is attached to the upper surface of the instrument main body 82. In addition, a reflector 84 is attached to the lower surface of the fixture body 82, and a pair of lamp sockets 84 are attached to opposite ends of the reflector 84 in the longitudinal direction. A straight tube type fluorescent lamp 86 that irradiates visible light and light including ultraviolet rays in the wavelength range of 300 nm to 410 nm as a light source is detachably attached. The fluorescent lamp 86 is visible light and has 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 translucent cover that transmits at least part of the ultraviolet rays of 80% or more. The same effect can be obtained by using an annular or compact fluorescent lamp that irradiates visible light and at least a part of ultraviolet rays of 300 nm to 410 nm instead of the straight fluorescent lamp. A three-wavelength light emitting type or other fluorescent lamp that irradiates light including visible light and ultraviolet light in a wavelength region of 300 nm to 410 nm shown in the embodiment is used.
[0104]
  And the intermediate | middle layer and the photocatalyst layer are laminated | stacked and formed on the outer surface side of the tube 87 similarly to the case shown in FIG. 5 of 1st Embodiment.
[0105]
  The fifth embodiment also exhibits the same operations and effects 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 even when resin is used, the operation and effect shown in the first embodiment are not hindered.
[0106]
  In addition, a sixth embodiment will be described with reference to a projector as an illumination device shown in FIG.
[0107]
  FIG. 16 is a plan view in which a part of the projector is cut out, and the projector 91 shown in FIG. 16 is disposed in a stadium, for example.
[0108]
  The projector 91 shown in FIG. 16 has a rotary curved instrument body 92 made of aluminum die cast, an opening 93 is formed on the front surface of the instrument body 92, and a starting pulse is generated on the back surface of the instrument body 92. A box 95 in which the starter 94 is accommodated is attached, an attachment body (not shown) for attachment 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 rear surface side. In addition, a pair of lamp sockets 98 is attached to the appliance main body 92 in the vicinity of the back side, and between these lamp sockets 98, light including visible light and ultraviolet light in a wavelength region of 300 nm to 410 nm is irradiated as a light source. A short arc type high intensity discharge lamp 99 is attached. In addition, the inner surface of the instrument main body 92 includes a high-intensity discharge lamp 99, and a reflector 100 having a rotating curved surface is mounted in the same manner as the instrument main body 92. Further, as described in the first embodiment, a photocatalyst layer may be formed around the appliance main body 92 to facilitate maintenance.
[0109]
  In addition, an illumination cover 101 that transmits 80% or more of visible light and at least a part of ultraviolet rays in a wavelength region of 300 nm to 410 nm as a light-transmitting cover made of flat tempered glass is provided in the frame 102 in the opening 93 on the front surface. It is held and attached to the instrument body 92 so that it can be opened and closed.
[0110]
  Then, an intermediate layer and a photocatalyst layer are laminated on the outer surface side of the illumination cover 101, as in the case of the first embodiment shown in FIG.
[0111]
  The sixth embodiment also exhibits the same operations and effects as the first embodiment by turning on the high-intensity discharge lamp 99 or by external light such as sunlight. In particular, it is possible to prevent a decrease in illuminance of a projector that is not easily maintained at a high place, thereby improving maintenance and exhibiting an energy saving effect.
[0112]
  The projector is not limited to a runway approach light, an approach angle indicator light, or an outdoor type, but the same effect can be obtained when used for a theater spotlight or an effect light.
[0113]
  Further, a seventh embodiment will be described with reference to an aviation obstacle light as the illumination device shown in FIG.
[0114]
  FIG. 17 is a plan view in which a part of the aviation obstacle light is cut out. The aviation obstacle light 111 shown in FIG. 17 is disposed in, for example, a high-rise building or a high-rise building.
[0115]
  The aircraft obstacle light 111 shown in FIG. 17 has a hollow instrument main body 112, 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 a heat radiating hole on the upper side. 114 has been drilled. Further, a cylindrical base 115 is attached to the upper part of the instrument main body 112, and the inside of the base 115 and the heat radiating hole 114 are communicated to form an air flow path 116. A substrate 117 is attached to the outer surface of the base 115, and a light emitting diode 118 that emits red visible light is attached to the substrate 117 as a number of light sources. Further, a red transparent red cover 119 is detachably attached to the instrument body 112 as a cylindrical plastic translucent cover containing the light emitting diode 118 on the upper part of the instrument body 112. Then, an intermediate layer and a photocatalyst layer are laminated on the outer surface side of the red cover 119 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.
[0116]
  Further, as the light source of the seventh embodiment, a light source that outputs light including ultraviolet rays in a wavelength region of 300 nm to 410 nm is provided in place of the light emitting diode 118 or in addition to the light emitting diode 118, and transmits light. You may make it transmit 80% or more of at least one part ultraviolet-ray in the wavelength range of 300 nm-410 nm through a light cover.
[0117]
  And this 7th Embodiment also has the effect | action and effect similar to 1st Embodiment with external light, such as sunlight.
[0118]
  Furthermore, an eighth embodiment will be described with reference to a runway guide light as the illumination device shown in FIGS.
[0119]
  FIG. 18 is a sectional view showing a runway guide light, FIG. 19 is a plan view thereof, and the runway guide lights 121 shown in FIGS. 18 and 19 are disposed on a runway of an airport, for example.
[0120]
  The runway guide lamp 121 shown in FIGS. 18 and 19 has an instrument body 122 made of aluminum die cast, and the instrument body 122 is attached to a box 125 provided in a hole 124 formed in the runway 123 or the like. It is stored. A halogen lamp 126 for irradiating light including visible light and ultraviolet rays in a wavelength region of 300 nm to 410 nm is attached to the center of the instrument body 122 as a light source. In addition, a pair of reflecting mirrors 127 is attached to face the halogen lamp 126.
[0121]
  On the upper surface side of the instrument main body 122, a lid 128 made of aluminum die cast is detachably attached with a screw or the like (not shown) in the same manner as the instrument main body 122. The lid 128 corresponds to the reflecting mirror 127. An opening 129 is formed at the position, and the opening 129 is a ring-shaped glass 130 that transmits 80% or more of visible light and at least a part of ultraviolet rays in a wavelength region of 300 nm to 410 nm as a transparent cover made of block-shaped hard glass. Is attached. Then, an intermediate layer and a photocatalyst layer are laminated on the outer surface side of the ring glass 130 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 lid 128 to facilitate maintenance.
[0122]
  The eighth embodiment also exhibits the same operations 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 from contact with tires from an aircraft using a runway, and safety is further improved without increasing maintenance.
[0123]
  The ninth embodiment will be described with reference to a headlight device as an illumination device shown in FIG.
[0124]
  FIG. 20 is a cross-sectional view showing the headlight device, and the headlight device 141 shown in FIG. 20 is disposed in an automobile.
[0125]
  The headlight device 141 shown in FIG. 20 has a box-shaped instrument main body 142 having an open front surface, and a unit case 143 is attached to the back of the instrument main body 142, and a lamp socket 144 is attached to the unit case 143. The lamp socket 144 is detachably mounted with a discharge lamp 145 that irradiates light including visible light and ultraviolet light in the wavelength region of 300 nm to 410 nm as a light source. A reflective body 146 is attached.
[0126]
  In addition, a prism is formed on the inner surface as a lens-like translucent cover that transmits 80% or more of visible light and at least part of ultraviolet rays in the wavelength region of 300 nm to 410 nm in the opening on the front side of the instrument body 142. A headlight cover 147 is attached. Then, an intermediate layer and a photocatalyst layer are laminated on the outer surface side of the headlight cover 147 as in the case shown in FIG. 5 of the first embodiment.
[0127]
  The ninth embodiment also exhibits the same operations and effects as those of the first embodiment by turning on the discharge lamp 145 or by external light such as sunlight.
[0128]
  In this case, the headlight device is not limited to a general light source, a front glass having a reflecting mirror and a prism, but a projector-type headlight device having a light source, a reflecting mirror, an aspheric lens and a front glass, or The present invention may be applied to any of a multi-reflector type lamp having a reflecting mirror and a front glass. In addition to headlight devices, auxiliary lamps such as fog lamps, driving lamps or spot lamps, working lamps that are not allowed to be used during traveling, or small lamps, twilight lamps, cornering lamps, turn signal lamps, brake lamps, The same effect can be obtained when used for either a parking lamp or a rotating lamp. Furthermore, the same effect can be obtained when used for not only automobiles but also aircraft, ships, and other moving objects.
[0129]
  In particular, when used for such a moving object, dirt due to exhaust gas or the like on the road or other places is less likely to be adhered, maintenance is improved, visibility is improved, and energy is saved.
[0130]
  The tenth embodiment will be described with reference to the corrosion-resistant lighting device shown in FIGS.
[0131]
  FIG. 21 is a front view showing a tunnel lighting device, FIG. 22 is a side view, FIG. 23 is a cross-sectional view showing a mounting state of a lighting cover, and the tunnel lighting device 151 shown in FIGS. It is installed in the tunnel.
[0132]
  These tunnel lighting devices 151 shown in FIG. 21 to FIG. 23 have corrosion resistance, and have a stainless steel box-like instrument main body 152 having an open front surface. A metal fitting 153 is attached. Further, a lid 154 is attached to the front opening of the instrument main body 152 by a hinge 155 provided at the top thereof so that it can be opened and closed to the stainless steel lid 154 in the same manner as the instrument main body 152, and is provided at the lower part of the instrument main body 152. The lid body 154 is closed in a watertight manner to the instrument body 152 by the latch body 156.
[0133]
  Then, a concave portion 164 protruding outward along the periphery of the irradiation opening 157 of the lid body 154 is formed, and this concave portion is filled with a silicone rubber adhesive 165, and an illumination cover is provided on the back side of the lid body 154. 159 is pressed from the back side through a silicon rubber adhesive 166, and a pressing plate 167 as a light shielding member is spot welded. The light is blocked by the pressing plate 167, and the ultraviolet ray from the high pressure sodium lamp 162 is applied to the photocatalyst film near the silicon rubber packing 158. Is prevented, and the silicon rubber packing 158 is prevented from being deteriorated by the photocatalytic action. Accordingly, the silicon rubber adhesives 164 and 166 are hardly corroded by the photocatalyst layer.
[0134]
  In addition, lamp sockets 160 are attached to the instrument main body 152. These lamp sockets 160 are single-ended high-pressure sodium lamps that irradiate light including visible light and ultraviolet rays in a wavelength region of 300 nm to 410 nm as light sources. 161 is detachably attached, and the high-pressure sodium lamp 161 is provided corresponding to the reflector 168 provided on the instrument main body 152 and faces the illumination cover 159 of the lid 154. Furthermore, a ballast box 162 is attached to the appliance main body 152, which contains a ballast for starting and lighting the high-pressure sodium lamp 161. In the instrument main body 152, a reflector (not shown) that is optically opposed to the high-pressure sodium lamp 161 is disposed.
[0135]
  Furthermore, not only the surroundings of the instrument main body 152 and the lid body 154, but also the photocatalyst layer may be formed to facilitate maintenance as described in the first embodiment.
[0136]
  The tenth embodiment also exhibits the same operations and effects as the first embodiment by turning on the high-pressure sodium lamp 161 or by external light such as sunlight.
[0137]
  FIG. 24 is a cross-sectional view showing a mounting state of a lighting cover according to another embodiment. In the embodiment shown in FIG. 24, an irradiation opening 157 is formed in the center of the lid 154, and the irradiation opening 157 is formed. Includes a silicon rubber packing 158 having an H-shaped cross section and a transparent cover 159 serving as a translucent cover that transmits at least 80% of visible light and at least part of ultraviolet rays in the wavelength region of 300 nm to 410 nm. Is watertight. As in the case of the first embodiment shown in FIG. 5, the intermediate layer and the photocatalyst layer are laminated on the outer surface side, but the intermediate layer and the photocatalyst are in contact with the silicon rubber packing 158. Without providing a layer, the silicon rubber packing 158 is not oxidized or reduced by the photocatalyst layer.
[0138]
  FIG. 25 is a cross-sectional view showing the mounting state of the lighting cover of another embodiment. In the embodiment shown in FIG. 25, the photocatalyst layer of the lighting cover 159 is formed on the front surface of the outer surface, and the silicon rubber packing 158 and Silica (SiO₂) And alumina (Al₂O₃) Is formed to protect the photocatalytic layer.
[0139]
  Further, FIG. 26 is a cross-sectional view showing a mounting state of a lighting cover according to another embodiment. The embodiment shown in FIG. 26 is the inner surface side of the lid 154 in the embodiment shown in FIG. In addition, a light shielding plate 172 as a light shielding member is attached to the lid body 154 by spot welding, located between the silicon rubber packing 158 and the high pressure sodium lamp 162, and the ultraviolet light from the high pressure sodium lamp 162 is attached to the photocatalytic film near the silicon rubber packing 158. Is prevented, and the silicon rubber packing 158 is prevented from being deteriorated by the photocatalytic action.
[0140]
  Next, an eleventh embodiment will be described with reference to the tunnel illumination device shown in FIGS.
[0141]
  FIG. 27 is a front view showing a tunnel lighting device, and FIG. 28 is a side view with a part cut away. The tunnel lighting device 181 shown in FIGS. 6 to 8 is disposed in a tunnel, for example. Yes.
[0142]
  The tunnel lighting device 181 shown in FIGS. 27 and 28 is the same as the tunnel lighting device 21 shown in FIGS. 6 to 8, except that a low-pressure sodium lamp 182 that mainly emits visible light is attached to the lamp socket 26. Separately from the lamp 182, an ultraviolet irradiation lamp 183, so-called black light that mainly emits ultraviolet light, is disposed between the lamp sockets 184, 184, and the ultraviolet irradiation lamp 183 is disposed in parallel to the low-pressure sodium lamp 182. It is. In addition, an ultraviolet reflecting portion 185 that reflects light from the ultraviolet irradiation lamp 183 to almost the entire surface of the illumination cover 28 is formed on the reflection plate 25 corresponding to the ultraviolet irradiation lamp 183.
[0143]
  Even when the low-pressure sodium lamp 182 that irradiates or hardly irradiates ultraviolet rays is used, ultraviolet rays are irradiated from the ultraviolet irradiation lamp 183, so that photocatalysis can be performed reliably. Therefore, even if an arbitrary lamp that does not irradiate ultraviolet rays is used, photocatalysis can be performed reliably.
[0144]
  The twelfth embodiment will be described with reference to the emergency parking zone illumination device shown in FIGS.
[0145]
  FIG. 29 is a front view showing an emergency parking zone lighting device, and FIG. 30 is a side view with a part cut away.
[0146]
  The lighting device 191 shown in FIGS. 29 and 30 is disposed, for example, in an emergency parking zone in a tunnel.
[0147]
  29 and 30 is a so-called black light that mainly irradiates ultraviolet rays at the diagonal positions on both sides of the fluorescent lamps 47 and 47 that mainly emit visible light in the illumination device 41 shown in FIGS. The ultraviolet irradiation lamps 192 and 192 are arranged between the lamp sockets 193 and 193, respectively, and the ultraviolet irradiation lamps 192 and 192 are arranged in parallel with the fluorescent lamps 47 and 47. Further, on the reflection plate 45 corresponding to the ultraviolet irradiation lamps 192, 192, ultraviolet reflection portions 194, 194 are formed which reflect light from the ultraviolet irradiation lamps 192, 192 to the entire surface almost opposite to the illumination cover 48. Has been.
[0148]
  Even if fluorescent lamps 47 and 47 that irradiate or hardly irradiate ultraviolet rays are used, ultraviolet rays are emitted from the ultraviolet irradiation lamps 192 and 192, so that photocatalysis can be performed reliably. Therefore, also in this case, the photocatalyst can be reliably performed even if an arbitrary lamp that does not irradiate ultraviolet rays is used.
[0149]
  FIG. 31 is a cross-sectional view showing an attached state of the translucent cover. As shown in FIG. 31, the instrument main body 42 is provided with a watertight packing 195, and a photocatalyst film is not formed on the lighting cover 48 opposed to the packing 195, but faces the photocatalyst film of the instrument main body 42. The portion is provided with a light-shielding brush 196. Since the photocatalytic film is not formed on the portion facing the packing 195, the packing 195 is not corroded by the activity of the photocatalyst and can maintain water tightness for a long time. Even if the photocatalyst layer extends between the inner surfaces where the packing 195 is located due to a manufacturing defect, the ultraviolet rays are shielded by the brush 196, so that the packing 195 is hardly corroded. Further, since only a part of the tip of the brush 196 contacts the photocatalyst film, the brush 196 is hardly affected by the photocatalyst and is not easily corroded by the activity of the photocatalyst. The same effect can be obtained even if the brush 196 itself is formed of a member that is not easily affected by the activity of the photocatalyst.
[0150]
  Further, a thirteenth embodiment will be described with reference to a street light shown in FIG.
[0151]
  FIG. 32 is a perspective view showing a street lamp.
[0152]
  In the street light 201 shown in FIG. 32, the appliance main body 202 has a frame 202 having a shape corresponding to each side of the rectangular parallelepiped, and the frame 202 has a glass or a photocatalyst film formed on its surface on five surfaces. A translucent cover 203 made of resin is attached, and a high-intensity discharge lamp 204 as a light source is disposed inside. The frames 202 and 202 are connected to the pole 205 via a support 206, and a reflecting surface 207 is formed near the frame 202 of the pole 205.
[0153]
  And, for example, when photocatalyst is performed by ultraviolet rays from sunlight, the efficiency of the photocatalyst may decrease due to the shadow of the frame 202 itself, but the necessary ultraviolet rays are reflected by the photocatalytic film by the reflecting surface 207, The photocatalyst is performed by the reflected light from the reflecting surface 207, and the photocatalyst is efficiently and reliably performed.
[0154]
  The reflecting surface may be formed arbitrarily by forming the reflecting surface directly on the surface of the pole, attaching a separate mirror, or the like. Moreover, if a mirror etc. are attached to the existing illuminating device, it can be configured easily.
[0155]
  Further, when applied to an outdoor device-integrated type or a single-type photoswitch, a malfunction or sensitivity error due to a change in sensitivity due to dirt can be reduced. In particular, in the case of a switch that turns on the lamp when the ambient brightness changes to a predetermined value or less, it starts lighting even if the brightness is not less than the predetermined value due to dirt, or the brightness exceeds the predetermined value. In this case, it is possible to prevent a so-called malfunction in which the lamp is lit for an unnecessarily long time because it is not turned off.
[0156]
  Further, 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 material.
[0157]
【The invention's effect】
  According to the illuminating device of claim 1, the photocatalyst layer formed on the surface of the translucent cover is irradiated with ultraviolet rays from a light source, and the translucent cover is at least a part of the ultraviolet rays in a wavelength region of 300 nm to 410 nm. Since the transmittance of the light is 80% or more, the substance adhering to the surface of the photocatalyst layer is promoted to be oxidized and decomposed to remove dust or dust, and the photocatalyst layer and the translucent cover have a visible light transmittance of 80%. Above,The total film thickness of the photocatalyst layer formed on the surface of the translucent cover is 0.01 μm to 0.5 μm.Because there isVisible light is transmitted through the translucent cover on which the photocatalyst layer is formed,Can be irradiated. In addition, even when used in the outdoors by providing a watertight seal between the translucent cover and the instrument main body, dirt is not easily attached, so that an outdoor lighting device that can be easily maintained can be provided.
[0158]
  Claim2According to the described lighting device, the claim1ListedeffectIn addition, the risk of detachment of the photocatalyst layer can be eliminated without greatly reducing the transmittance of at least part of visible light and ultraviolet light in the wavelength region of 300 nm to 410 nm.
[0159]
  Claim3According to the described lighting device, claim 1Or 2DescribedeffectIn addition to anatase TiO₂It is possible to promote the oxidation and decomposition of the substance adhering to the surface of the photocatalyst layer with the main component of and to further purify dust or dust.
[0160]
  Claim4According to the illuminating device described, claims 1 to3Any one ofeffectIn addition, since the translucent cover has an ultraviolet transmittance of 80% or more in the wavelength region of 300 nm to 410 nm, it can reliably transmit the ultraviolet rays to the photocatalyst layer on the surface and ensure the photocatalyst in the photocatalyst layer.
[0161]
  Claim5According to the illuminating device described, claims 1 to4Any one ofeffectIn addition, since the acrylic resin hardly absorbs ultraviolet rays, the photocatalyst by the photocatalyst layer can be ensured.
[0162]
  Claim6According to the described lighting device, claim 15Any one ofeffectIn addition to the poles that support the instrument body, it can be installed in high places where maintenance is not easy.
[0163]
  Claim7According to the illuminating device described, claims 1 to6Any one ofeffectIn addition, since the portion where the photocatalyst layer is not formed is formed in the portion that is in contact with the device body side to be supported by the device body, the device body is oxidized and reduced by the photocatalytic action of the photocatalyst layer. Can be prevented.
[0164]
  Claim8According to the illuminating device described, claims 1 to7Any one ofeffectIn addition, the photocatalyst layer is not formed on the part of the translucent cover that contacts the packing.ButNegatively impact packingWaterIt is possible to prevent the density from being lowered.
[0165]
  According to a lighting device according to claim 9, claims 1 to7In addition to any one of the effects described above, light to the portion of the translucent cover that contacts the packing is blocked by the light blocking member to stop the photocatalytic action of the photocatalytic layer, and the photocatalytic layer has an adverse effect on the packing and has water tightness. It can be prevented from decreasing.
[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 with a part cut away.
FIG. 4 is a plan view of the same.
FIG. 5 is a sectional view showing the state of the photocatalyst layer.
FIG. 6 is a perspective view showing a tunnel illumination device according to the second embodiment;
FIG. 7 is a front view of the above.
FIG. 8 is a side view with a part cut away.
FIG. 9 is a perspective view showing an emergency parking zone illumination device according to 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 guide indicator lamp according to the fourth embodiment;
FIG. 13 is a plan view of the same.
FIG. 14 is a front view showing an evacuation tunnel illumination device according to a fifth embodiment of the same.
FIG. 15 is a side view of the same.
FIG. 16 is a plan view with a part cut away showing a projector according to the sixth embodiment;
FIG. 17 is a plan view in which a part of the aviation obstacle light according to the seventh embodiment is cut away.
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 plan view showing a corrosion-resistant lighting device according to the tenth embodiment.
FIG. 22 is a side view of the same as above.
FIG. 23 is a cross-sectional view showing an attached state of the illumination cover.
FIG. 24 is a cross-sectional view showing a mounting state of a lighting cover according to another embodiment.
FIG. 25 is a cross-sectional view showing a mounting state of a lighting cover according to another embodiment.
FIG. 26 is a cross-sectional view showing a mounting state of a lighting cover according to still another embodiment.
FIG. 27 is a front view showing the tunnel illumination device of the eleventh embodiment;
FIG. 28 is a side view in which a part is cut away.
FIG. 29 is a front view showing an emergency parking zone illumination device according to a twelfth embodiment.
FIG. 30 is a side view in which a part is cut away.
FIG. 31 is a sectional view showing the vicinity of the periphery of the above.
FIG. 32 is a perspective view showing a street lamp according to a thirteenth embodiment;
[Explanation of symbols]
        1 Road lighting system
        2 Paul
        3,22,42,62,82,92,112,122,142,152 Instrument body
        11 High pressure mercury lamp as light source
        12 Globe as translucent cover
        17 middle class
        18 Photocatalyst layer
        21,151,181 Tunnel lighting equipment
        27 Low pressure sodium lamp as light source
        28, 48, 101, 159 Lighting cover as translucent cover
        33,158,195 packing
        41,191 Emergency parking zone lighting system
        47, 66, 86 Fluorescent lamp as light source
        61 Tunnel guidance indicator lamp as lighting device
        67 Display board as translucent cover
        81 Evacuation mine lighting system
        87 Tube as translucent cover
        91 Floodlight as a lighting device
        99 High-intensity discharge lamp as light source
        111 Aviation Obstruction Light as a lighting device
        118 Light-emitting diode as light source
        119 Red cover as translucent cover
        121 Runway guide lights as lighting equipment
        130 Ring glass as translucent cover
        141 Headlight device as lighting device
        145 Discharge lamp as light source
        147 Headlight cover as translucent cover
        161, 182 Low pressure sodium lamp as light source
        172 Shading plate as shading member
        183 and 192 UV irradiation lamp as light source
        201 Street light as a lighting device

Claims (9)

A light source for irradiating light including visible light and ultraviolet light in a wavelength region of 300 nm to 410 nm;
A translucent cover that covers at least a part of ultraviolet rays in a wavelength region of 300 nm to 410 nm and a visible light transmittance of 80% or more and covers a light source;
A photocatalytic layer formed on the outer surface of the translucent cover with a thickness of 0.01 μm to 0.5 μm and having a visible light transmittance of 80% or more;
An instrument body provided with a light source and a translucent cover;
A packing provided between the translucent cover and the instrument main body and watertight between the translucent cover and the instrument main body;
The lighting device is characterized by being installed outdoors .   2. The lighting device according to claim 1, wherein the photocatalyst layer is provided through an intermediate layer in which at least a part of transmittance of visible light and ultraviolet rays in a wavelength region of 300 nm to 410 nm is 80% or more. . The lighting device according to claim 1, wherein the photocatalyst layer is formed mainly of anatase crystal TiO ₂ .   4. The lighting device according to claim 1, wherein the translucent cover has an ultraviolet transmittance of 80% or more in a wavelength region of 300 nm to 410 nm.   The lighting device according to claim 1, wherein the translucent cover is formed mainly of an acrylic resin.   The lighting device according to claim 1, further comprising a pole that supports the instrument body.   7. The translucent cover is formed with a portion where the photocatalyst layer is not formed in a portion that is in contact with the device main body in order to be supported by the device main body. The lighting device according to one. Lighting apparatus of claims 1 to 7 any one described is characterized by not forming the photocatalyst layer in a portion in contact with the packing of light-transmitting cover. Lighting device that features the claims 1 to 7 any one describes that includes a light shielding member for blocking light to the portion in contact with the packing translucent cover.

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