JP2002329413A - Stain removing structure of illumination fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stain removing structure of an illumination fixture having a shape profile with which rain water or the like is not directly contacted wherein dusts or the like adhered to a cover of the illumination fixture are completely removable and wherein the removal can be carried out comparatively easily. SOLUTION: The illumination fixture is composed of a support column 8, a lamp 9 and a cover to wrap the lamp 9, and an illumination fixture 1 covers a surface of a cove 3 by a hydrophilic film 4, and numerous recessed grooves 2 are formed to go to the bottom side from the top side of the cover 3 on the surface of the hydrophilic film 4. In case there is no recessed groove 2, the rain water or the like makes contact with the surface only up to the maximum diameter positions P, but by forming the recessed grooves 2, the rain water or the like makes contact with the surface even to the bottom of the cover 3 of the support column 8 side uniformly from P. By this, the dusts or the like are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dirt removing structure for a lighting fixture having a shape in which part or all of a contour shape of a cover to be exposed to water is reduced in a downward direction. The present invention relates to a dirt removing structure for a lighting fixture capable of completely washing and removing adhering dust and the like.

[0002]

2. Description of the Related Art Illumination tools such as those shown in FIGS.
The shape shown in FIG. 7 has been conventionally employed. FIG.
The lighting fixture 100 shown in FIG. 1 includes a support 8, a lamp 9, and a spherical contoured cover 300 that encloses the lamp 9 and has a base end fixed to the support 8. The lighting fixture 100a shown in FIG. 17 includes a support 8 and a lamp 9 and a cover 300a that encloses the lamp 9 and has a base end fixed to the support 8 and the cover 300a is supported from the top side thereof. It has a contour shape that is reduced toward the bottom side on the eight side.

[0003]

The covers 300 and 300a of the lighting fixtures 100 and 100a shown in FIGS. 16 and 17 are in a state where dust and dirt (hereinafter referred to as dust 11 (FIG. 18)) easily adhere. Yes, especially covers 300, 300a
However, if the lamp is exposed to the atmosphere, a large amount of dust and the like 11 adhere to the lamp and adversely affect the illuminance of the lamp 9. Therefore, it is necessary to remove dust and the like 11. Cover 300, 300a
In the case of the lighting fixtures 100 and 100a exposed to the atmosphere side, the rainwater 10 occasionally comes into contact with the covers 300 and 300a,
The covers 300 and 300a are wetted by water and are self-cleaned.

[0004] However, as shown in FIG.
In this case, rainwater adheres only to the upper half of the cover 300, and the rainwater hardly hits the lower half of the cover 300 from the point P at the maximum diameter position toward the column 8 side. Therefore, dust or the like 11 attached to the upper half of the cover 300
Is removed by rainwater and falls downward.
Dust and the like 11 attached to the lower half of 00 are not removed. Similarly, as shown in FIG.
In the case of 00a, there is a problem that dust is removed only on the top side as shown in the figure, and rainwater 10 does not hit most of the other places, and dust is not removed. Therefore, this type of lighting fixture 100,
In the case of 100a, self-cleaning by the rain water 10 could not be performed, and special water washing had to be performed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and irrespective of the contour of the lighting device, dust and the like adhering to the surface of the cover are effectively removed by self-cleaning. It is an object of the present invention to provide a dirt removing structure for a lighting fixture that can always maintain a desired illuminance in a desired state.

[0006]

According to the present invention, in order to achieve the above object, a dirt removing structure for a lighting fixture according to claim 1 is provided.
A dirt removing structure for removing dust, dirt, and the like adhering to the surface of the cover of a lighting device including a lamp and a cover surrounding the lamp by washing with water, and covering the surface of the cover with a hydrophilic film, It is characterized in that a concave groove or an uneven portion is formed on the surface of the hydrophilic film. As described above, rainwater and the like flows along the concave grooves and uneven portions formed on the surface of the hydrophilic film covering the cover, and the entire surface of the cover is wetted by the rainwater, thereby completely removing dust and the like. As a result, the illuminance of the illuminating device can always be maintained in a normal state.

Further, in the dirt removing structure for a lighting device according to a second aspect of the present invention, the concave groove is a connecting groove.
By forming the continuous grooves, rainwater or the like can smoothly and reliably flow down.

[0008] In a third aspect of the present invention, the dirt removing structure for a lighting device is characterized in that the irregularities make the surface of the hydrophilic film rough. By making the surface of the hydrophilic film rough, rainwater or the like flows down along the rough irregularities.

Further, in the dirt removing structure for a lighting device according to a fourth aspect of the present invention, the groove or the uneven portion is formed on a surface of the hydrophilic film which directly covers the cover itself. I do. By forming the concave groove and the uneven portion on the hydrophilic film, rainwater can flow down more reliably.

According to a fifth aspect of the present invention, in the dirt removing structure for a lighting device according to the fifth aspect, the concave groove or the uneven portion is formed by directly projecting the concave groove or the uneven portion directly formed on the surface of the cover onto the hydrophilic film. It is characterized by being formed by being formed. Since the concave grooves and uneven portions formed on the cover are projected on the hydrophilic film on the surface, almost the same effects as those formed on the hydrophilic film itself can be obtained.

According to a sixth aspect of the present invention, in the dirt removing structure for a lighting device, the concave groove or the uneven portion is formed on a surface of an undercoat covering the surface of the cover. It is formed by being projected onto the hydrophilic film side covering the undercoat. Because grooves and irregularities formed in the undercoat coated on the surface of the cover are projected on the hydrophilic film on the surface,
Almost the same effects as those formed on the hydrophilic film itself can be obtained.

In the stain removing structure for a lighting device according to a seventh aspect of the present invention, the cover is formed such that a part or the entire surface of the cover has a contour shape which is reduced in a downward direction. And Since the present invention can be applied to all luminaires having a contour shape having a shape portion that is reduced downward, the applicable range is extremely wide.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a dirt removing structure for a lighting fixture according to an embodiment of the present invention. 1 and 2 show the structure of a lighting device 1 having a dirt removing structure according to the present invention. The lighting device 1 includes a support 8, a lamp 9, and a cover 3 that encloses the lamp 9 and has a base end thereof fixed to the support 8. In the present embodiment, the cover 3 is formed of a spherical shape, but may be of any other spherical shape, of course, a trapezoidal shape described later, or any other shape having a contour that is reduced toward the bottom. May be.

The cover 3 is made of a relatively thin glass or resin material forming the cover 3 itself. In this embodiment, the cover 3 is covered with a hydrophilic film 4. In particular, when the cover 3 is made of a resin material, it is preferable to cover the cover 3 with a hydrophilic film 4 in order to improve water wettability. The hydrophilic film 4 is provided for improving water wettability, and is made of, for example, a photocatalytic film formed by applying a titanium oxide-containing liquid. Further, the film thickness is small, about 0.1 to 1 μm.

As shown in FIGS. 1 and 2, this hydrophilic film 4
A concave groove 2 is formed entirely on the surface of. That is, the concave groove 2 is formed in a curved shape from the top side of the spherical cover 3 to the bottom side of the column 8 side, and extends along the circumferential direction as shown in FIGS. Many are formed at equal intervals.
FIG. 3 is a top view as viewed in the direction of arrow A in FIG. 2, and FIG.
FIG. 7 is a cross-sectional view taken along line BB of FIG.

FIG. 5 is a partially enlarged view of FIG.
A concave groove 2 is formed in the hydrophilic film 4 covering the glass part in an uneven shape. The concave groove 2 is desirably formed within the thickness of the hydrophilic film 4, but may have a bottom reaching the cover 3. As an example of a method for forming the concave groove 2, a flow coat using a coating solution adjusted to have an appropriate viscosity is employed. More specifically, a liquid having a higher viscosity is sprayed on a flat base material with a hose or the like to wet the entire surface, and the solvent is allowed to evaporate by allowing the liquid to evaporate. This streak corresponds to the groove 2. The size and the like of the concave groove 2 are affected by conditions such as viscosity temperature and humidity of the liquid used.

By forming the concave groove 2 having the above-described shape, when the rainwater 10 hits the top of the lighting fixture 1 as shown in FIG. 10, the rainwater 10 flows from the top along the contour of the cover 3. However, rainwater 10 that is guided by the concave groove 2 and circulates toward the support column 8 without falling directly downward from the point P at the maximum diameter position of the cover 3 as in the related art is generated. As a result, the portion from the point P of the cover 3 to the lower column 8 side also covers
, And the dust and the like 11 adhering to this portion can be removed cleanly.

FIG. 6 shows another embodiment of the present invention, and is a partially enlarged view of a portion corresponding to FIG. 5 described above. In the case of the above embodiment, as shown in FIGS. 4 and 5, the concave groove 2 is formed directly on the hydrophilic film 4. In the present embodiment, the groove 5 is formed on the cover 3a side. The shape of the groove 5 is substantially the same as the shape of the groove 2. As a method for forming the concave groove 5, there is press molding. When the hydrophilic film 4 is formed on the surface of the cover 3a forming the concave portion 5, the hydrophilic film 4 has a very small thickness, so that the shape of the concave portion 5 is directly projected on the hydrophilic film 4 side. A concave groove 2 a is formed on the surface of the hydrophilic film 4. As described above, the rainwater 10 flows along the concave groove 2a as in the case shown in FIG. 10, and the dust and the like 11 are completely removed.

FIG. 7 shows still another embodiment of the present invention, and is a partially enlarged view corresponding to FIGS.
In this embodiment, an undercoat 6 is formed on the surface of the cover 3.
Is formed, and a concave groove 7 is formed on the surface of the undercoat 6. As a method for forming the concave groove portion 7, there is a method by the above-mentioned flow coating using a coating solution adjusted to an appropriate viscosity. By forming the undercoat 6 on the surface of the collar 3, the durability can be improved and the adhesion to the hydrophilic film 4 can be improved. In particular, when the cover 3 is made of a resin material, the coating with the undercoat 6 is effective. The undercoat 6, the photocatalytic film and the like have a high heat resistance temperature, but the resin material generally has a low heat resistance. Therefore, in the case of forming an undercoat, it is necessary to select a firing temperature and a solvent composition according to the firing temperature. In the case of the present embodiment, FIG.
As shown in FIG. 6, a groove 7 having the same shape as that of FIG. 6 is formed on the surface of the undercoat 6. Thereby, the concave groove 2a can be formed on the surface of the hydrophilic film 4 covering the surface of the undercoat 6. As described above, the hydrophilic film 4
The groove 2a that can exhibit the same effect can be formed in the hydrophilic film 4 without forming the groove 2 directly on the hydrophilic film 4.

FIG. 8 shows another embodiment of the present invention, which is one of the application examples of the lighting fixture 1 shown in FIG. 1 and the like. In this case, the concave groove 2b formed on the surface of the hydrophilic film 4 has an oblique groove. This inclination angle may be an appropriate angle, but any angle may be used as long as the rainwater 10 (FIG. 10) easily flows from the top side toward the bottom side on the column 8 side. In addition,
The groove 2b may be formed directly on the hydrophilic film 4 as described above, or may be formed by projecting from the cover 3 side or the undercoat 6 side. Above groove 2
The effect of removing dust and the like 11 similar to the above can also be improved by b.

FIG. 9 shows a case where a concave groove 2A is formed in a lighting device 1A having a trapezoidal cover 3A. In the case of the illuminating device 1A, since the size is reduced from the top side toward the bottom side on the support column 8 side, rainwater adheres only around the top as described in the above-mentioned prior art. However, by forming the groove 2A along the inclined surface, the rainwater 10 flows along the groove 2A as shown in FIG.
Dust and the like 11 adhering to the entire surface can be cleanly removed. Also in the case of the present embodiment, the concave groove 2A is formed directly on the hydrophilic film 4A or formed by projecting from the concave groove (not shown) provided in the cover 3A and its undercoat (not shown). What is done is adopted.

FIG. 12 shows, for example, a lighting device 1B in which an uneven portion 12 is provided on the surface of a lighting device coated with a hydrophilic film.
The uneven portion 12 is formed in large numbers on almost the entire surface of the lighting fixture 1B, but may be formed only on the lower side. The uneven portion 12 is formed by applying and baking a coating liquid to which a high boiling point solvent such as ethylene glycol is added. When such irregularities 12 are formed, the rainwater 10 is attracted to the irregularities 12 as shown in FIG. 13, and the rainwater 10 also flows along the surface of the lower part, so that the lower part is washed with the rainwater 10. Will be The uneven portion 12 may be formed not only on the surface of the hydrophilic film but also on the cover 3a or the undercoat 6 as shown in FIGS. In the cover 3a, the concave and convex portions 12 are formed by frost processing, press molding, and sandblasting. In the case of the intercoat 6, the concave and convex portions 12 are formed by applying and baking a coating liquid to which a high boiling point solvent is added.

FIG. 14 shows a lighting fixture 1 having a hexagonal outline shape.
FIG. 15 shows an illumination device 1D in the form of a rugby ball having the uneven portions 12 and / or the concave grooves 2 provided thereon. In either case, the entire surface is cleaned.

In the above description, the method of removing dust and the like from lighting fixtures having various contours has been described. However, the contour is not limited to the above, and any contour having a shape that is reduced downward is used. Applied to

[0025]

According to the first aspect of the present invention, according to the structure for removing dirt from a lighting fixture, the cover is covered with a hydrophilic film to improve the degree of water wetting, and the surface of the hydrophilic film has a concave groove. Alternatively, since the uneven portion is formed, rainwater or the like hits the entire surface of the hydrophilic film, and the attached dust and the like can be washed away, thereby preventing a decrease in illuminance. 2) According to the dirt removing structure of the luminaire of claim 2 of the present invention, by providing a continuous concave groove, it is possible to surely and completely remove dust and the like. According to the third aspect of the present invention, the unevenness is formed to make the surface of the hydrophilic film rough, so that rainwater is attracted along the unevenness, and the entire surface is removed. Cleaning becomes possible. 4) According to the dirt removing structure of the luminaire of claim 4 of the present invention, since the concave groove or the uneven portion is formed directly on the surface of the hydrophilic film, the flow of rainwater or the like is performed more reliably. According to the fifth aspect of the present invention, in the dirt removing structure for a lighting device according to the present invention, the concave groove is formed by projecting a concave groove portion or a concave / convex portion formed on the cover side to the hydrophilic film side, and is directly recessed in the hydrophilic film. Almost the same effects as in the case of forming the groove or the uneven portion can be obtained. 6) According to the stain removing structure of the lighting device of claim 6 of the present invention, the groove is formed by projecting a groove or an uneven portion formed on the surface of the undercoat covering the cover on the hydrophilic film side, Almost the same effects as those provided directly on the hydrophilic film can be obtained. 7) According to the dirt removing structure of the illuminating device according to claim 7 of the present invention, the cover is not limited to a spherical shape, but is applied to all shapes having a contour that is reduced in a downward direction.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a schematic structure of a lighting device provided with a dirt removing structure of the present invention.

FIG. 2 is a front view of a lighting device provided with a concave groove of the dirt removing structure of the present invention.

FIG. 3 is a top view as viewed in the direction of arrow A in FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is an enlarged view of a circle shown in FIG. 4;

FIG. 6 is an enlarged view showing a portion corresponding to FIG. 5 in another embodiment of the present invention.

FIG. 7 is an enlarged view of a portion corresponding to FIG. 5 in another embodiment of the present invention in which an undercoat is provided on a surface of a cover.

FIG. 8 is a front view of a lighting device showing another embodiment of the present invention in which oblique grooves are provided.

FIG. 9 is a front view of a lighting device having a trapezoidal cover whose contour shape is reduced toward the bottom, in which the concave groove of the present invention is provided in the cover.

FIG. 10 is a cross-sectional view for explaining a method of removing dust and the like in the lighting device of the present invention having a spherical cover.

FIG. 11 is a cross-sectional view for explaining a method of removing dust and the like in the lighting device of the present invention having a trapezoidal cover that is reduced in size from the top to the bottom.

FIG. 12 is a front view of an illuminator in which uneven portions are formed on the surface of a hydrophilic film.

13 is a partial cross-sectional view for explaining an enlarged shape around an uneven portion in FIG. 12 and a form of dust removal by rainwater.

FIG. 14 is a front view of a lighting device having a cover having a hexagonal outline shape.

FIG. 15 is a front view of a lighting device having a cover with a contour shape of a rugby ball shape.

FIG. 16 is a cross-sectional view showing a lighting device having a conventional spherical cover.

FIG. 17 is a cross-sectional view showing a conventional trapezoidal lighting device.

18 is a front view for explaining a method of removing dust and the like in the lighting fixture shown in FIG.

19 is a front view for explaining a method of removing dust and the like in the lighting fixture shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lighting tool 1A lighting tool 1B lighting tool 1C lighting tool 2 concave groove 2a concave groove 2b concave groove 2a concave groove 3 cover 3a cover 4 hydrophilic film 4a hydrophilic film 5 concave groove 6 undercoat 7 concave groove 8 support 9 lamp 10 Rainwater 11 Dust, etc. (dust and dirt, etc.) 12 Roughness

Claims (7)

[Claims] 1. A dirt removing structure for removing dust, dirt, and the like adhering to the surface of a cover of a lighting device including a lamp and a cover surrounding the lamp by washing with water, wherein the surface of the cover is a hydrophilic film. A dirt removing structure for a lighting device, wherein the groove is covered with a hydrophilic film and a concave groove or an uneven portion is formed on the surface of the hydrophilic film. 2. The structure according to claim 1, wherein the concave groove is a connecting groove. 3. The method according to claim 1, wherein the uneven portion is made to roughen the surface of the hydrophilic film.
The dirt removing structure of the lighting fixture according to the above. 4. The structure for removing dirt from a lighting device according to claim 1, wherein the concave groove or the uneven portion is formed on a surface of the hydrophilic film which directly covers the cover itself. 5. The method according to claim 1, wherein the groove or the uneven portion is formed by projecting the groove or the uneven portion directly formed on the surface of the cover toward the hydrophilic film. 2. The structure for removing dirt from a lighting device according to 1. 6. The method according to claim 6, wherein the groove or the uneven portion is formed on a surface of the undercoat coated on the surface of the cover, and the groove or the uneven portion formed on the surface of the undercoat is projected on the hydrophilic film side covering the undercoat. The dirt removing structure for a lighting device according to claim 1, wherein the dirt removing structure is formed. 7. The dirt removing structure for a lighting device according to claim 1, wherein the cover forms a contour shape that is reduced in a downward direction on a part or the entire surface of the cover.