Photocatalyst carrying luminaire

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a luminaire provided with a light source for illuminating purposes and which carries a photocatalyst having effects such as deodorization, sterilization, and antifouling.

【0002】

[Conventional technology]

Titanium oxide, an n-type semiconductor, is known as a photocatalyst that promotes various chemical reactions such as deodorization, sterilization, decomposition of organic substances, purification of water, and wastewater treatment by the energy of ultraviolet rays. Various methods of supporting a photocatalyst on a glass plate, a tube, or a glass fiber have been proposed (Japanese Patent Laid-Open No. 62-66861, Japanese Patent Application Laid-Open No. 5-309267, EP633064, US4888101). However, there are problems that the catalytic activity tends to decrease, the durability is insufficient, the light transmittance of the supported photocatalyst is insufficient, and the manufacturing cost is very high.

【0003】

[Problems to be Solved by the Invention]

The problems that must be solved in order to support the photocatalyst on the lighting equipment are that the adhesion between the photocatalyst and the surface substrate of the lighting equipment is good, and that the photocatalytic activity is supported on the base of the lighting equipment container. It is not lowered, the light transmittance is not lowered by supporting the photocatalyst, the adhesive layer is not deteriorated by the supported photocatalyst, and the strength is maintained for a long period of time and the durability is maintained.

【0004】

[Means for solving problems]

The lighting fixture carrying the photocatalyst according to the present invention has a structure in which an adhesive layer is provided between the photocatalyst layer and the surface of the lighting fixture substrate, and the adhesive layer is a silicon-modified resin or poly having a silicon content of 2 to 60% by weight. A resin containing 3 to 60% by weight of siloxane or a resin containing 5 to 40% by weight of colloidal silica, and the photocatalyst layer is a photocatalyst containing 25 to 95% by weight of a metal oxide gel or a metal hydroxide gel. It is characterized by being a complex.

【0005】

The adhesive layer provided between the photocatalyst layer and the surface of the luminaire substrate has a function of firmly adhering the photocatalyst layer to the surface of the substrate, and the adhesive layer itself is not easily deteriorated by the photocatalytic action. doing.

【0006】

Examples of the resin used as the adhesive layer include acrylic resin, acrylic-silicon resin, silicon-modified resin, urethane resin, epoxy resin, polyester resin, alkyd resin, etc., in which silicon, polysiloxane, or colloidal silica is introduced by a commonly used method. However, silicon-modified resins containing acrylic-silicon resin and epoxy-silicon resin are the most excellent in terms of durability.

【0007】

BEST MODE FOR CARRYING OUT THE INVENTION

As the material of the adhesive in the present invention, a silicon-modified resin such as acrylic-silicon resin or epoxy-silicon resin having a silicon content of 2 to 60% by weight, a resin containing 3 to 60% by weight of polysiloxane, or colloidal silica may be used. A resin containing 5 to 40% by weight is suitable because it firmly adheres the photocatalyst and the adhesive layer itself is less deteriorated by the photocatalyst. Silicon-modified resins such as acrylic-silicon resin and epoxy-silicon resin with a silicon content of less than 2% by weight, resins with a polysiloxane content of less than 3% by weight, or resins with a colloidal silica content of less than 5% by weight , The adhesion with the photocatalyst layer becomes poor, and the adhesive layer is easily deteriorated by the photocatalyst, and the photocatalyst layer is easily peeled off. Silicon-modified resins such as acrylic-silicon resin and epoxy-silicon resin with a silicon content of more than 60% by weight have poor adhesion between the adhesive layer and the carrier, and poor wear resistance due to the reduced hardness of the adhesive layer. Become. With a resin having a polysiloxane content of more than 60% by weight or a resin having a colloidal silica content of more than 40% by weight, the adhesive layer becomes porous and the adhesiveness between the carrier and the adhesive layer deteriorates. The photocatalyst is easier to peel off than glass.

【0008】

When the adhesive layer resin is a silicon-modified resin such as acrylic-silicon resin or epoxy-silicon resin, the method of introducing silicon into the resin is ester exchange reaction, graft reaction using silicon macromer or reactive silicon monomer, hydrosilylation. There are various methods such as reaction and block copolymerization, but any method can be used. Acrylic resin and epoxy resin are the most excellent resins for introducing silicon in terms of film formation, toughness, and adhesion to carriers, but any resin such as alkyd resin, urethane resin, and polyester resin can be used. it can. These resins can be used in either solvent-soluble or emulsion types. There is no problem even if an additive such as a cross-linking agent is contained.

【0009】

When the adhesive layer resin contains polysiloxane, adhesiveness and durability when the polysiloxane is a hydrolyzate of silicon alkoxide having an alkoxy group having 1 to 5 carbon atoms or a product produced from the hydrolyzate. A lighting fixture carrying a photocatalyst with improved siloxane is obtained. When the number of carbon atoms in the alkoxy group of the silicon alkoxide exceeds 6, it is expensive and the hydrolysis rate is very slow, so that it becomes difficult to cure in the resin, and the adhesiveness and durability deteriorate. It is possible to use a polysiloxane obtained by hydrolyzing a silicon alkoxide partially containing chlorine, but if a polysiloxane containing a large amount of chlorine is used, the photocatalytic activity may be reduced due to the chlorine ions of impurities, or the adhesiveness may be reduced. Make it worse. As a method of introducing polysiloxane into a resin, a method of mixing a silicon alkoxide monomer with a resin solution and hydrolyzing it with water in the air at the time of forming an adhesive layer, or a method of partially hydrolyzing silicon alkoxide in advance with a resin is used. There are various methods such as mixing and further hydrolyzing with water in the air when forming the protective film, but any method may be used as long as it can be uniformly mixed with the resin. Further, in order to change the hydrolysis rate of the silicon alkoxide, a small amount of acid or base catalyst may be added. As the resin into which polysiloxane is introduced, any resin such as acrylic resin, acrylic-silicon resin, epoxy-silicon resin, silicon-modified resin, urethane resin, epoxy resin, polyester resin, and alkyd resin can be used, but acrylic-silicon can be used. Silicon-modified resins, including resins and epoxy-silicon resins, are the most durable.

【0010】

When the adhesive layer is a resin containing colloidal silica, the particle size of the colloidal silica is preferably 10 nm or less. At 10 nm or more, not only the resin in the adhesive layer is easily deteriorated by the photocatalyst, but also the adhesiveness between the photocatalyst layer and the adhesive layer is deteriorated. The simplest method for introducing this colloidal silica into the resin is to mix the resin solution and the colloidal silica solution, and then apply and dry to form a protective film. However, the resin is introduced in a state where the colloidal silica is dispersed. A polymerized and synthesized product may be used. In order to improve the adhesiveness and dispersibility between the colloidal silica and the resin, the colloidal silica may be treated with a silane coupling agent before use. As the resin into which colloidal silica is introduced, any resin such as acrylic resin, acrylic-silicon resin, epoxy-silicon resin, silicon-modified resin, urethane resin, epoxy resin, polyester resin, and alkyd resin can be used, but acrylic-silicon can be used. Resin-modified resins, including resins and epoxy-silicon resins, are the most durable. The colloidal silica can be any material, whether it is a silica sol made by cation exchange of a sodium silicate solution or a silica sol made by hydrolyzing silicon alkoxide.

【0011】

Durability can be improved by mixing a light stabilizer and / or an ultraviolet absorber or the like with the adhesive layer resin for the purpose of suppressing deterioration due to photocatalytic action. As a light stabilizer that can be used, a hindered amine type is preferable, but other light stabilizers can also be used. As the ultraviolet absorber, a triazole type or the like can be used. The amount added is 0.005 wt% or more and 10 wt% or less, preferably 0.01 wt% or more and 5 wt% or less with respect to the resin. Further, if the adhesive layer is treated with a silane-based or titanium-based coupling agent, the adhesiveness with the photocatalyst layer may be improved.

【0012】

As a method of supporting the adhesive layer on the glass, a method of coating and drying the resin solution by a printing method, a sheet molding method, a spray spraying method, a dip coating method, a spin coating method or the like can be used. The drying temperature varies depending on the type of solvent and resin, but is generally preferably 150 ° C or lower. By setting the thickness of the adhesive layer to 0.5 μm or more and 20 μm or less, it is possible to satisfy the characteristics required for the adhesive layer, that is, the photocatalyst layer is firmly adhered and the adhesive layer is resistant to deterioration due to the photocatalyst.

【0013】

The metal oxide gel or metal hydroxide gel in the photocatalyst layer not only adheres the photocatalyst powder and firmly adheres to the adhesive layer, but also has adsorptivity because the gel is porous, and has photocatalytic activity. It also has the effect of increasing. The content of the metal oxide gel or the metal hydroxide gel in the photocatalyst layer is preferably 25 to 95% by weight. If it is 25% by weight or less, the adhesion to the adhesive layer is insufficient, and if it is 95% by weight or more, the photocatalytic activity is insufficient. In addition, the specific surface area of the metal oxide gel or metal hydroxide gel is 100 m.²When it is more than / g, the adhesiveness becomes stronger and the catalytic activity also improves. As the material, an oxide gel or a hydroxide gel of a metal of silicon, aluminum, titanium, zirconium, magnesium, niobium, tantalum, or tungsten is preferable. Further, a gel in which these are mixed may be used, or a composite oxide gel prepared by a method such as a coprecipitation method may be used. In order to mix with the photocatalyst, it is desirable to mix in the state of the sol before forming a gel, or at the stage of the raw material before preparing the sol. Methods for preparing the gel include a method of hydrolyzing a metal salt, a method of neutralizing and decomposing, a method of ion exchange, a method of hydrolyzing a metal alkoxide, and the like. The photocatalyst powder is uniformly dispersed in the gel. Any method can be used as long as it can be obtained in a state of being. However, the presence of a large amount of impurities in the gel adversely affects the adhesiveness and catalytic activity of the photocatalyst, so a gel having few impurities is preferable. In particular, the presence of 5% or more of organic matter in the gel reduces the photocatalytic activity.

【0014】

As a photocatalyst in the photocatalyst layer, TiO₂, ZnO, SrTiO₃, CdS, GaP, InP, GaAs, BaTiO₃, K₂NbO₃, Fe₂O₃, Ta₂O₅, WO₃, SnO₂, Bi₂O₃, NiO, Cu₂O, SiC, SiO₂, MoS₂, InPb, RuO₂, CeO₂, Etc. and to these photocatalysts Pt, Rh, RuO₂, Nb, Cu, Sn, NiO and other known metals and metal oxides added can all be used. As for the content of the photocatalyst in the photocatalyst layer, the larger the amount, the higher the catalytic activity, but from the viewpoint of adhesiveness, it is preferably 75% by weight or less.

【0015】

In order to form the photocatalyst layer on the adhesive layer, a suspension in which the photocatalyst is dispersed in a metal oxide sol or a metal hydroxide sol solution can be coated by a coating method similar to that for forming the adhesive layer. .. The photocatalyst may be dispersed in the state of a metal oxide sol or a precursor solution of a metal hydroxide sol, and hydrolyzed or neutralized and decomposed at the time of coating to form a sol or gel. When a sol is used, an acid or alkaline gelatinizing agent or the like may be added for stabilization. Further, it is also possible to add 5% by weight or less of a surfactant, a silane coupling agent, or the like to the photocatalyst in the sol suspension to improve the adhesiveness and operability. The drying temperature at the time of forming the photocatalyst layer varies depending on the carrier material and the resin material in the adhesive layer, but is preferably 50 ° C or higher and 200 ° C or lower.

【0016】

The thickness of the photocatalyst layer is 0.1 μm or more and 10 μm or less, and the photocatalyst particles having a crystal particle size of 40 nm or less and the specific surface area of 100 m²When a metal oxide gel or a metal hydroxide gel of / g or more is used, the photocatalytic activity is sufficiently sufficient for practical use, and the total light transmittance of the photocatalytic layer and the adhesive layer at a wavelength of 550 nm is 70% or more.

【0017】

A luminaire in which an adhesive layer and a photocatalyst layer are provided on the surface of a base container of a luminaire can absorb harmful ultraviolet rays on the surface of the container and prevent the luminaire from being emitted to the outside. Further, in the case of a fluorescent lamp, it has been customary to add an ultraviolet absorber to a fluorescent substance applied in a container, but such measures are not required. The carrier provided with the adhesive layer and the photocatalyst layer of the present invention has an ultraviolet intensity of 3 mW / cm.²High durability that the adhesion by the grid tape method of JIS K 5400 maintains an evaluation score of 6 points or more even after irradiating with the black light of No. 4 for 500 hours at a temperature of 40 ° C and a relative humidity of 90%. You can also make things that show sex.

【0018】

The photocatalyst-supported lighting fixture according to the present invention is suitable for exerting antibacterial, antifouling, and deodorizing effects by photocatalytic action, and incandescent lamps, halogen lamps, discharge lamps, and fluorescent lamps that emit at least ultraviolet rays inside the lighting fixtures. It includes light sources such as lamps and HID lamps, and is roughly classified into the following four types.

【0019】

(1) Completely sealed type It is a type that is completely sealed with packing etc. so that the installation location of the light source inside the fixture and the outside air do not flow, and it is a rainproof and moistureproof type. In such an instrument, it is desirable to support and coat the photocatalyst according to the present invention on the outer surface, and it is preferable to support and coat the photocatalyst according to the present invention on the outside of the thick line portion as shown in FIG. In addition to the ceiling-mounted type that covers the light source so as to wrap it with a transparent or diffusive permeable material as shown in Fig. 1, there are fixtures such as hanging type (pendant), wall-mounted type (bracket), and stand type. , The shape of the glove can be preferably applied to any shape such as a spherical shape or a cubic shape, and any orientation. There is also a cover type that covers the front of the light source with a transparent or diffusion permeable material in the same way, and it is not limited to the ceiling-mounted type as shown in Fig. 2, but also a hanging type (pendant) and a wall-mounted type. (Bracket), embedded type, stand type, etc. can be considered, and the cover shape can be preferably applied to any shape such as a flat surface or a three-dimensional surface, and any orientation.

【0020】

(2) Simple sealed type It is made of a transparent or diffuse permeable material, and the light source is sealed in appearance, but there is air flow inside and outside the fixture. It is desirable to apply the photocatalyst according to the present invention on both the inside and the outside of the thick line portion as shown in FIG. In addition to the floor-mounted spotlights shown in Fig. 3, hanging type (pendant), wall-mounted type (bracket), stand type, and various portable lighting equipment can be considered, and the shape of the front glass is also possible. It can be preferably applied to any shape such as a circle or a polygon, and any orientation.

【0021】

(3) Open type A type that has air flow between the place where the light source is installed and the outside, a glove type that wraps the light source with a transparent or diffuse permeable material (Fig. 4), a transparent or diffuse permeable material A cover type that covers the front of the light source (Fig. 5), a shade type that covers the periphery of the light source with a transparent or diffuse transparent material (Fig. 6), and a reflector that controls the light distribution by a reflection phenomenon (Fig. 7). , A baffle that is diffused by an opaque or diffuse permeable material and whose light distribution is controlled by reflection or absorption (Fig. 8). In addition to the ones shown in the figure, hanging type (pendant), wall-mounted type (bracket), embedded type, stand type and other appliances can be considered, and their shapes and orientations can be preferably applied to all kinds. In these types, the photocatalyst according to the present invention is not limited to the part shown by the thick line in each figure, but all the parts where the antibacterial, antifouling, and deodorant effects due to the photocatalytic action are desired to be exhibited in the place where the light from the light source is directly irradiated. It is desirable to carry and apply to.

【0022】

(4) Other Other lighting fixture parts suitable for supporting and coating the photocatalyst according to the present invention include loopers that control light distribution by a light-shielding plate, strass beads that are decorative parts used for chandeliers, and various displays including a lighting light source inside. It is preferable to carry and coat the photocatalyst according to the present invention on the surface irradiated with light from a light source such as a panel or a mirror ball and the portion where air from the outside enters.

【0023】

In the photocatalyst-supported lighting fixture according to the present invention, the photocatalyst may be supported in a portion where the light from the light source is directly or indirectly irradiated, and the socket, the switch operation unit, and the light source which are the components constituting the lighting fixture The present invention also applies to light source supporting parts such as poles, frames, and arms that support the light source, and various photocatalysts such as prisms, lenses, reflectors, loopers, and baffles installed on the optical path of light emitted from the light source. Supporting such a photocatalyst is preferably applicable.

【0024】

The lighting equipment according to the present invention can be supported at any site as long as the surface temperature of the site where the photocatalyst layer is supported via the adhesive layer is 200 ° C or less, and the photocatalytic action of the lighting fixture can be used for antibacterial, deodorant, and antifouling. Because it can be expected to have excellent effects such as, for interior lighting such as homes and offices, for vehicles such as bicycles, automobiles, ships, aircraft, trains, etc., for decoration such as chandeliers, high temperature and humidity in bathrooms and kitchens, etc. Environmental, street lights, road lights, park lights, indicator lights, signal lights, tunnel lights, and other outdoor lighting, stage and studio lighting, refrigerators and deodorizing equipment, and equipment installed inside various storage containers. Suitable for use in a very wide range of applications such as for portable lighting equipment.

【0025】

[Example]

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples.

【0026】

Example 1 Flashlight Remove the plastic lens on the front of the flashlight that uses a commercially available fluorescent lamp as the light source, and add polysiloxane (manufactured by Corcoat Co., Ltd.) to a xylene solution containing 20% by weight of acrylic silicone resin with a silicon content of 3% by weight on the outer surface of this lens. A solution obtained by mixing 25% by weight of methyl silicate 51) with acrylic silicone resin and diluting it with isopropanol to a solid content of 15% by weight is sprayed using a spray gun WIDER88 manufactured by Iwata Paint Machinery Co., Ltd. It was applied and dried at 100 ° C for 120 minutes to form an adhesive layer. Next, in the plastic lens on which this adhesive layer was formed, a titanium oxide sol having a titanium oxide content of 15% by weight deflated with aqueous ammonia was placed in a silica sol having a silicon oxide content of 20% by weight in the presence of a surfactant. A solution for a photocatalyst layer, which was dispersed and diluted with ion-exchanged water to an oxide concentration of 10% by weight, was applied in the same manner as the adhesive layer and dried at 100 ° C. for 120 minutes to obtain a photocatalyst-supported flashlight lens. (sample 1) [0027]

Example 2 Bathroom lighting cover Same as in Example 1 on the outer surface of the thick line portion of the thick line portion of the bathroom luminaire for the ceiling-mounted type bathroom luminaire, which is a completely sealed ceiling-mounted type, which covers the light source so as to wrap it with a transparent or diffuse permeable material as shown in FIG. An adhesive layer and a photocatalyst layer were applied according to the materials and methods of the above to obtain a photocatalyst-supported bathroom lighting cover. (sample 2) [0028]

Example 3 Simple closed floor-standing type An adhesive layer and a photocatalyst layer were applied to the inner and outer surfaces of the thick line portion of the floor-mounted type spotlight shown in FIG. 2 by the same materials and methods as in Example 1 to obtain a photocatalyst-supported spotlight. (sample 3) [0029]

Example 4 Open glove type Adhesive layer and photocatalyst by the same material and method as in Example 1 on the inside and outside surface of the thick line part of the glove type luminaire of the type shown in FIG. A layer was applied to obtain a photocatalyst-supported lighting glove. (sample 4) [0030]

Example 5 Open cover type Adhesive layer and photocatalyst layer by the same material and method as in Example 1 on the inside and outside surface of the thick line part of the cover type luminaire of the type shown in FIG. 4 in which the front of the light source is covered with a transparent or diffusion permeable material. Was applied to prepare a photocatalyst-supported lighting cover. (sample5) [0031]

Example 6 Open shade type Adhesive layer and photocatalyst layer by the same material and method as in Example 1 inside and outside the thick line part of the stand type shade type luminaire that covers the periphery of the light source with the transparent or diffusible transparent material shown in FIG. Was applied to obtain a photocatalyst-supported shade. (sample6) [0032]

Example 7 Reflector An adhesive layer and a photocatalyst layer were applied to the reflector whose light distribution is controlled by the reflection phenomenon shown in FIG. 6 using the same materials and methods as in Example 1 to obtain a photocatalyst-supported reflector. (sample 7) [0033]

Example 8 Baffle A photocatalyst carrier is coated with an adhesive layer and a photocatalyst layer by the same material and method as in Example 1 on a baffle portion that is diffused by an opaque or diffuse permeable material and whose light distribution is controlled by reflection or absorption shown in FIG. And said. (sample 8) [0034]

Example 9 Louver An adhesive layer and a photocatalyst layer were applied to the louver whose light distribution was controlled by a light-shielding plate shown in FIG. 8 using the same materials and methods as in Example 1 to obtain a photocatalyst-supported louver. (sample 9) [0035]

Example 10 Strath beads An adhesive layer and a photocatalyst layer were applied to strass beads, which are decorative parts used for chandeliers, using the same materials and methods as in Example 1 to obtain photocatalyst-supported strass beads. (sample 10) [0036]

Example 11 Mirror ball An adhesive layer and a photocatalyst layer were applied to the surface of the mirror ball by the same material and method as in Example 1 to obtain a photocatalyst-supported mirror ball. (sample 11) [0037]

Example 12 Hereinafter, a twelfth embodiment of the present invention will be described with reference to the road lighting device shown in FIGS. 9 to 12. 9 is a vertical cross-sectional view showing a road lighting device, FIG. 10 is a perspective view thereof, FIG. 11 is a rear view with a part thereof cut out, FIG. 12 is a plan view, and FIG. 13 is a photocatalyst. It is a schematic diagram of a translucent cover. The road lighting device 1 shown in FIGS. 9 to 13 is attached to the tip of the pole 2 and is arranged along, for example, a highway or a general road. The road lighting device 1 has a device body 3 having a substantially oval shape in a plane, and a pole support portion 4 for attaching to a pole 2 which is a support is formed at the base end of the device body 3, and the device body 3 is formed. A closure 5 is formed on the tip side of the device toward the lower surface, and a plurality of reflectors 6, 7, which face the closure 5 and reflect the irradiated light toward the closure 5 on the inner surface of the instrument body 3. The lamp socket 8 is attached to the base end side via the lamp socket mounting plate 9, and the lamp socket mounting plate 9 also reflects the light emitted to the base end side. The plate 10 is attached. A high-pressure mercury lamp, which is a HID lamp as a light source that radiates an amount of ultraviolet rays of 300 nm or 400 nm at 0.05 W or more per 1000 lm, is detachably attached to the lamp socket 8. In addition, a glove 12 as a translucent cover made of substantially hemispherical hard glass is held in the frame body 13 and can be opened and closed by a hinge 14 provided on the instrument main body 3 on the tip side of the closing port 5. Then, the frame 13 is held by the instrument body 3 in a state where the glove 12 and the frame 13 close the closure 5 by the latch 15 provided on the instrument body 3 on the base end side of the closure 5. Further, the instrument body 3 is attached with a packing 16 that watertightly seals the frame body 13 in a state of being closed to the instrument body 3.

【0038】

Next, the operation of this embodiment will be described. First, the high-pressure mercury lamp 11 which is a light source is turned on to irradiate visible light and light of 300 nm to 400 nm. The light from the high-pressure mercury lamp 11 is reflected by the reflectors 6 and 7, or reaches the glove 12 directly and is irradiated downward through the glove 12. An adhesive layer and a photocatalyst layer are formed on the glove 12 by the same material and method as in Example 1, and the ultraviolet rays reaching the glove 12 are absorbed by the photocatalyst layer 18 in FIG. 13 and are contained in the photocatalyst layer 18. Photocatalytic action is caused by titanium oxide. Therefore, organic substances and the like which are dirt adhering to the photocatalyst layer 18 are more efficiently oxidized and decomposed, and apparently, dirt is less likely to adhere to the photocatalyst layer 18. Therefore, even if dust or dirt such as tobacco fat, oil or fat component is accumulated on the surface of the glove 12, the adhesion of these organic substances is effectively prevented, and the luminous flux emitted through the glove 12 is reduced. It can be prevented, the cleaning of the glove 12 is not required, and the maintenance cost can be reduced.

【0039】

Example 13 Next, a thirteenth embodiment will be described with reference to the tunnel lighting devices shown in FIGS. 14 to 16. 14 is a perspective view of the tunnel lighting device, FIG. 15 is a front view, and FIG. 16 is a side view with a part cut out. The tunnel lighting device 21 shown in FIGS. 14 to 16 is, for example, in a tunnel. It is arranged. The tunnel lighting device 21 has a thin box rectangular parallelepiped fixture body 22 in the center, a closure 23 is formed on the lower surface of the fixture body 22, and a plate-shaped mounting leg 24 for mounting is formed on the back surface of the fixture body 22. It is formed. In addition, the reflector 25 of the instrument body 22 is attached, and the lamp socket 26 is attached to one end surface of the reflector 25 in the longitudinal direction. The lamp socket 26 receives 0.05 W of ultraviolet rays of 300 nm or 400 nm per 1000 lm. A high-pressure sodium lamp 27 as a light source that emits the above is detachably attached. Further, in the opening 23, a lighting cover 28 as a translucent cover made of flat tempered glass is held by the frame main body 29 and is attached to the opening 23 so as to be openable and closable by a hinge 31 provided at one end of the opening 23. The frame 29 is held by the instrument main body 22 in a state where the lighting cover 28 and the frame 29 close the closing 23 by the latch 32 provided on the other side. Further, the instrument body 22 is attached with a packing 33 that watertightly seals the frame 13 in a state of being closed to the instrument body 22. Further, on the outer surface side of the illumination cover 28, an adhesive layer and a photocatalyst layer according to the present invention similar to those shown in FIG. 13 of the twelfth embodiment are formed. Then, by turning on the high-pressure sodium lamp 27 in this embodiment as well, the same actions and effects as those in the first embodiment can be exhibited.

【0040】

Example 14 A fourteenth embodiment will be described with reference to the emergency parking zone luminaire, which is the tunnel luminaire shown in FIGS. 17 to 19. FIG. 17 is a perspective view showing an emergency parking zone lighting device, FIG. 18 is a front view, FIG. 19 is a side view with a part cut out, and the tunnel lighting device 41 shown in FIGS. 17 to 19 is For example, it is arranged in an emergency parking zone in a tunnel. The emergency parking zone lighting device 41 shown in FIGS. 17 to 19 has a hollow rectangular parallelepiped fixture main body 42, and a closure 43 is formed on the lower surface of the fixture main body 42 and is attached to the back surface of the fixture main body 42. A plate-shaped mounting leg 44 for use is formed. In addition, a plate-shaped reflector 45 that reflects the light emitted toward the closing 43 toward the closing 43 is installed in the instrument main body 42, and both ends of the reflecting plate 45 in the longitudinal direction are respectively installed. Straight tube type fluorescent lamps 47 and 47 as a light source are detachably attached between the lamp sockets 46 and 46 which are paired with each other. The same effect can be obtained by using an annular type or a compact type fluorescent lamp instead of the straight tube type fluorescent lamp. The fluorescent lamp 47 is filled with a rare gas of an inert gas such as mercury and argon gas, and the phosphor layer formed inside (not shown) is excited by ultraviolet rays emitted from mercury to become visible light. It is formed of a three-wavelength fluorescent substance or the like to be converted.

【0041】

The above-mentioned three-wavelength type phosphor has, for example, (Y, Gd) BO3: Eu as a red-based phosphor having a peak wavelength near 616 nm, CaPO4 as a green phosphor having a peak wavelength near 540 nm, and a peak wavelength near 450 nm. BaMgAl14O23: Eu is used as the blue phosphor. Fluorescent lamps 47 for general lighting are usually considered to prevent the output of ultraviolet rays as much as possible, but a small amount of near-ultraviolet rays having a wavelength of 365 nm, which is the emission line of mercury, is emitted. The fluorescent lamp 47 is not limited to the three-wavelength type, and the same effect can be obtained by using a calcium halophosphate phosphor or a fluorescent substance used for others. Further, in the opening 43, a lighting cover 48 as a translucent cover made of flat tempered glass is held by the frame body 49 and is attached to the opening 43 so as to be openable and closable by a hinge 51 provided on one side of the closing 43. The frame 49 is held by the instrument body 42 in a state where the lighting cover 48 and the frame 49 close the closing 43 by a latch 52 provided on the other side of the 43.

【0042】

Further, in the 14th embodiment as well, by lighting the fluorescent lamp 47, the adhesive layer and the photocatalyst layer according to the present invention are provided on the translucent cover 48 as in the 12th embodiment. , The same action and effect as in Example 12 are exhibited.

【0043】

For samples.1 to 11 obtained in Examples 1 to 11, adhesion test by the grid tape method specified in JIS K5400, 5000 hours for each luminaire under a temperature of 40 ° C and a relative humidity of 90%. Durability was evaluated by examining the adhesion by the grid tape method after lighting and use. In addition, the salad oil decomposition activity and antibacterial activity, which are indicators of photocatalytic activity, were investigated, and the results are summarized in Table 1.

【0044】

<Test method> 1) Salad oil decomposition activity (antifouling properties) A commercially available salad oil (manufactured by Nissin Essential Oil Co., Ltd.) is applied to the surface of a lighting fixture carrying a photocatalyst using tissue paper, and the amount applied is 0.1 mg / cm.²The luminaire prepared by applying the coating was turned on, and the weight change during lighting was weighed and recorded with a precision balance capable of measuring up to 0.1 mg. The evaluation was based on the weight residual ratio of the applied salad oil after 48 hours, and the evaluation criteria were as follows. Evaluation of salad oil residual rate after 48 hours of light irradiation 10% or less A 30 ~ 10% B 50 ~ 30% C 80 ~ 50% D 80% or more E [0045]

2) Antibacterial evaluation A sample having a size of 2 to 3 cm square was prepared by cutting the surface portion of the container carrying the photocatalyst of the lighting equipment carrying the photocatalyst. The photocatalyst-supported surface of this sample is disinfected with 80% ethanol, dried at 150 ° C, sterilized, and then precultured and diluted in advance to increase the bacterial concentration to 10.⁵Drop 0.2 ml of Escherichia coli solution adjusted to individual / ml onto the sample surface and set in the incubator. Set four samples each under two types of light irradiation conditions: one that was irradiated with light from a white fluorescent lamp (15 W x 2 and a distance of 10 cm from the light source) and one that was not irradiated with light at all. After a predetermined time (1, 2, 3, 4 hours), take out the sample and wipe off the bacterial solution on the sample with sterile gauze soaked in sterile saline. Place the wiped sterile gauze in 10 ml of sterile saline and stir well. This supernatant bacterial solution is planted in an autoclave-sterilized 95 mmφ Petri dish agar medium, and the number of Escherichia coli colonies is counted after culturing at 36 ° C for 24 hours. Prepare a sample for measuring the number of reference bacteria with exactly the same operation before putting it in the incubator, inoculate the supernatant of sterile physiological saline on a Petri dish agar medium, and count the number of E. coli colonies after 24 hours culture. .. The survival rate of Escherichia coli after a predetermined time of each sample is calculated based on the numerical value. The evaluation was based on the residual rate of Escherichia coli in the sample irradiated with fluorescent light after 4 hours, and the evaluation criteria were as follows. Evaluation of E. coli survival rate after 4 hours 20% or less A 20-40% B 40-60% C 60-80% D 80% or more E [0046]

3) Adhesion evaluation Adhesion was evaluated by the grid tape method test specified in JIS K 5400. The cut spacing was set to 2 mm, and the number of stitches was set to 25. The evaluation points were based on the criteria described in JIS K 5400.

【0047】

4) Durability evaluation A sample having a size of 2 to 3 cm square was prepared by cutting the surface portion of the container carrying the photocatalyst of the lighting equipment carrying the photocatalyst. UV intensity 3 mW / cm with black light on the sample carrying this photocatalyst²After irradiating the light in a constant temperature and humidity chamber with a temperature of 40 ° C and a relative humidity of 90% for 500 hours, the adhesiveness was measured by the grid tape method specified in JIS K 5400, and the durability was evaluated. The evaluation score is the same as the adhesiveness evaluation.

【0048】

[table 1]

<img file="JPH09171707A_D0001.tif" />【0049】

[Effect of the invention]

Lighting equipment that carries a highly durable photocatalyst that has high photocatalytic activity, high light transmission, and is resistant to deterioration, for the purpose of antibacterial, deodorizing, antifouling, etc. It can be applied to a wide range of applications.

[Simple explanation of drawings]

[Figure 1]

Schematic cross-sectional view of the lighting fixture according to the second embodiment [Figure 2]

Schematic cross-sectional view of the lighting fixture according to the third embodiment [Fig. 3]

Schematic cross-sectional view of the lighting fixture according to Example 4 [Fig. 4]

Schematic cross-sectional view of the lighting fixture according to Example 5. [Fig. 5]

Schematic cross-sectional view of the lighting fixture according to Example 6 [Fig. 6]

Schematic cross-sectional view of the lighting fixture according to Example 7. [Fig. 7]

Schematic cross-sectional view of the lighting fixture according to Example 8 [Fig. 8]

Schematic cross-sectional view of the lighting fixture according to Example 9. [Fig. 9]

A vertical sectional view showing a road lighting device according to a twelfth embodiment. [Fig. 10]

Same as above perspective view [Fig. 11]

Same as above Rear view with a part cut out [Fig. 12]

Same as above plan view [Fig. 13]

Same as above Schematic cross-sectional view of a glove carrying a photocatalyst [Fig. 14]

A perspective view showing a tunnel lighting device according to a thirteenth embodiment. [Fig. 15]

Same as above front view [Fig. 16]

Same as above Side view with a part cut out [Fig. 17]

A perspective view showing a tunnel lighting device according to a fourteenth embodiment. [Fig. 18]

Same as above front view [Fig. 19]

Same as above Side view with a part cut out [Explanation of symbols]

1 Road lighting device 2 pole 3, 22, 42, 62 Instrument body 11 High-pressure mercury lamp as a light source 12 Gloves as a translucent cover 17 Adhesive layer 18 Photocatalytic layer 21 Tunnel lighting device 27 High pressure sodium lamp 28, 48 Lighting cover as a translucent cover 33 packing