JP2004303603A - Guide light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide light capable of suppressing the degradation of light emission quantity or the like due to the stains of a transparent cover. <P>SOLUTION: On the surface 3a of the transparent cover 3 of a guide light 1, there is formed a coating layer 3b made up of a titanium dioxide photocatalyst that oxidatively destroys organic matters by exerting a catalysis when the visible light of a illuminating lamp or the like is irradiated. In addition, an inclined front board 35 inclined upward on the transparent cover 3 is inclined at the angle of inclination of 45°or over in relation to a horizontal direction. Since dusts and others adhered to the surface of the inclined front board 35 are likely to drop naturally from the portions, the accumulation of dusts and others can be prevented or suprressed. Since, on the surface of the transparent cover 3, the coating layer 3b with a self-cleaning characteristic is formed, and the portions where dusts and others are likely to accumulate are steeply inclined; the surface of the transparent cover 3 can be kept clean for a long period of time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a guide light installed on a wall or the like in order to safely guide a person along an evacuation route to an evacuation exit in an emergency such as a fire in an underground mall, a subway passage, or the like. It relates to improvement of the cover.
[0002]
[Prior art]
Guidance lights installed in underground malls and subway passages are installed to guide people to a safe place such as an evacuation exit when the visibility is deteriorated due to smoke or the like due to a fire or the like. A commercial AC power supply is used as a power supply for the guide light. There is also known a system that switches to a storage battery in an emergency when commercial AC power is cut off to turn on a guide light. For example, a disaster prevention lighting device having a configuration according to Patent Document 1 is disclosed.
[0003]
The present applicant has proposed a guide light system suitable for installation in a place where a commercial AC power supply is not buried, particularly in a road tunnel (Japanese Patent Application No. 2002-337463).
[0004]
[Patent Document 1]
JP-A-2001-338784
[Problems to be solved by the invention]
Here, in an underground shopping mall, a subway, or in a road tunnel, a large amount of dust, car exhaust gas, and the like are generated. Therefore, the dust easily adheres to and accumulates on the transparent cover covering the surface of the guide light. If the transparent cover is contaminated, the transparency may be reduced, the brightness at the time of lighting may be reduced, and the visibility may be reduced.
[0006]
In addition, in a guide light configured to self-generate power by incorporating a solar panel, if the transparent cover is contaminated, the energy of external light incident through the transparent cover is attenuated. As a result, there is a possibility that a sufficient amount of power cannot be generated. Similarly, in the case of an induction lamp with a built-in illuminance sensor, the illuminance sensor malfunctions even if the transparent cover is dirty in order to emit light when the illumination is turned off in the event of a fire or when the illuminance is reduced due to smoke filling. There is fear.
[0007]
In view of the above, an object of the present invention is to propose a guide light provided with a transparent cover capable of avoiding or suppressing accumulation of dust and dirt.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a guide light of the present invention includes a guide light body including a light source lamp, a transparent cover attached to the guide light body, and at least a part of a surface of the transparent cover. Wherein the coating layer has a self-cleaning property capable of oxidatively decomposing organic substances attached to the surface of the coating layer. As a coating layer having a self-cleaning property, a coating layer made of a photocatalyst such as a titanium dioxide photocatalyst can be used.
[0009]
According to the present invention, dirt such as dust adhering to the transparent cover of the guide light is oxidized and decomposed by the coating layer, so that the surface of the transparent cover is maintained in a clean state for a long time. Therefore, it is possible to avoid adverse effects such as a decrease in visibility due to dirt on the transparent cover, a decrease in the amount of power generated by the built-in solar panel, and a malfunction of the built-in illuminance sensor.
[0010]
Here, a guide light installed on a wall surface such as an underground shopping mall or a subway passage irradiates not the sunlight but the light of an illumination light or an advertisement light. Therefore, in this case, it is desirable to form a coating layer of a photocatalyst that exerts a catalytic action by a visible light component instead of an ultraviolet ray.
[0011]
Further, in the transparent cover of the guide light, dust and the like tend to adhere to and accumulate on a portion facing upward. Therefore, it is desirable that the coating layer is formed on a portion of the transparent cover that is easily contaminated, that is, on a surface of the transparent cover that faces upward from the horizontal direction.
[0012]
Further, it is desirable that the surface portion of the transparent cover facing upward from the horizontal direction is a flat surface or a convex curved surface inclined at an inclination angle of 45 degrees or more with respect to the horizontal direction. If the inclination angle is increased, it is possible to suppress the adhesion and accumulation of dust and the like.
[0013]
Next, the coating layer may be formed on a portion of the transparent cover facing the light source lamp. In the case where the guide light main body includes a battery power supply for supplying driving power to the light source lamp, and the battery power supply includes a solar panel that performs a power generation action by external light incident through the transparent cover. In this case, the coating layer may be formed on a portion of the transparent cover facing the solar panel. Furthermore, when the guide light body includes an illuminance sensor that detects illuminance based on external light incident through the transparent cover, a portion of the transparent cover facing a light receiving surface of the illuminance sensor. The coating layer may be formed beforehand.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a guide light to which the present invention is applied will be described below with reference to the drawings.
[0015]
FIG. 1 is a perspective view showing the guide light according to the present embodiment in a partially cut-out state, FIG. 2 is a front view of the guide light in a state in which a transparent cover of the guide light is cut out, a longitudinal sectional view of the guide light, FIG. 3 is a schematic cross-sectional view of a light source lamp of a guide light. The guide light 1 according to the present embodiment is installed on a wall surface of an underground mall, a tunnel, or the like, and includes a guide light main body 2 and a transparent cover 3 made of plastic or the like. The guide light main body 2 includes a mounting plate 2A fixed to the wall surface W, and a light source lamp unit 4 mounted on the surface 2a of the mounting plate 2A. The light source lamp unit 4 is covered by the transparent cover 3. .
[0016]
The light source lamp unit 4 includes a unit case 5 assembled from a plate material such as a steel plate, and three solar panels 6 are attached to an upper end portion of the unit case 5. A light source lamp 7 is attached to a lower part of the front surface of the unit case 5, and a secondary battery 8 and a control board 9 are arranged inside the unit case 5.
[0017]
The transparent cover 3 of this example is transparent to visible light, and the illumination light and the light of the advertising light installed in the underground mall or the tunnel pass through the transparent cover 3 and reach the light receiving surface of the internal solar panel 6. It is possible. Further, the light from the light source lamp unit 4 can be transmitted through the transparent cover 3 and emitted to the outside. The transparent cover 3 includes a horizontal bottom plate portion 31, a vertical front plate portion 32 and left and right vertical side plate portions 33 and 34 extending vertically upward from a front edge and left and right edges of the bottom plate portion 31, and a vertical front plate portion. 32 has an inclined front plate portion 35 that is receded at an inclination angle θ steeper than 45 degrees from the upper end (see FIG. 2B).
[0018]
The rear edge of the bottom plate portion 31, the left and right vertical side plate portions 33 and 34, and the inclined front plate portion 35 are fixed to the mounting plate surface 2a in a liquid-tight manner via a seal member 10 such as an O-ring. In order to fix the cover 3 to the mounting plate surface 2a, the left and right vertical side plate portions 33, 34 of the cover 3 are formed with laterally protruding flanges 36, 37, to which fixing screws (not shown) are attached. Tap holes 36a and 37a for screwing are formed.
[0019]
Here, as shown in FIG. 1, a coating layer 3b having a self-cleaning property is formed on the entire surface 3a of the transparent cover 3 of the present embodiment. The coating layer 3b is a coating layer made of, for example, a titanium dioxide photocatalyst. When a visible light component having a wavelength of 420 to 430 nm is applied, the coating layer 3b exerts a catalytic action to oxidize and decompose organic substances such as dust adhering to the surface. Such a photocatalyst coating layer 3b can be formed using a photocatalyst coating agent sold by Nippon Parkerizing Co., Ltd. under the trade name of "Partitanium".
[0020]
As described above, the coating layer 3b having a self-cleaning property is formed on the surface 3a of the transparent cover 3 of the present embodiment, and the upwardly facing portion (the inclined front plate) of the transparent cover 3 on which dust and the like easily accumulate. The portion 35) is a steep slope of 45 degrees or more. Therefore, it is possible to suppress the accumulation of foreign matter such as dust on the surface 3a of the transparent cover 3, and the foreign matter attached to the surface 3a is oxidized and decomposed by the action of the coating layer 3b. Therefore, the surface 3a of the transparent cover 3 can be kept clean for a long period of time.
[0021]
Next, the three solar panels 6 attached to the upper end of the light source lamp unit 4 are slightly oblong rectangles, and are installed at an inclination angle of approximately 45 degrees so that the front side is downward. I have. The solar panel 6 receives light from an illumination light, an advertisement light, or the like installed on a ceiling or the like via the cover 3 to generate power. Electric power generated by the solar panel 6 is stored in the secondary battery 8.
[0022]
On the other hand, the light source lamp 7 of the present example includes a flash lamp 11, three white light emitting diode lamps 21, 22, and 23, and a light emission control circuit (see FIG. 3) for controlling light emission of these lamps. As can be seen from FIGS. 2B and 2C, the flash lamp 11 is disposed substantially at the center of the guide lamp 1 in the width direction, and one white light emitting diode lamp 21 is disposed on the right side of the flash lamp 11. On the left side of the flash lamp 11, two white light emitting diode lamps 22 and 23 are arranged. These are arranged at the same height position.
[0023]
The flash lamp 11 includes a gas discharge bulb 12, a reflector 13, and a front cover 14 disposed on the front of the bulb 12 (see FIG. 2B). In this example, by appropriately setting the shape of the reflecting surface of the reflector 13, the vertical divergence angle of the emitted light is set to be equal to or less than a predetermined angle, and the directivity of the emitted light in the vertical direction is enhanced. A filter 14a for cutting visible light components of 500 nm or less is attached to the front cover 14. Alternatively, a filter layer having the same optical characteristics may be coated on the front or back surface of the front cover 14. As a result, the light emitted from the flash-on lamp 11 is not white light but pale yellow, yellow, or pale orange. In addition to the flash lamp, a yellow light emitting diode may be used.
[0024]
Next, as shown in FIG. 2C, the white light emitting diode lamp 21 disposed on the right side of the flash lamp 11 is located on the right side with respect to the main optical axis 11a of the flash lamp 11 extending forward of the guide lamp. It is arranged so that the direction inclined by 30 degrees becomes the optical axis 21a of the emitted light. Further, the white light emitting diode lamp 21 of this example uses a narrow angle light emitting diode having a divergence angle of 30 degrees or less, for example, 20 degrees, which is narrower than a general one. Further, the lamp lens 21b of the white light emitting diode lamp 21 is formed with a coating having an optical property of cutting a visible light component of 500 nm or less. Further, in addition to the white light emitting diode lamp, a yellow light emitting diode may be used.
[0025]
The white light emitting diode lamp 22 disposed on the left side of the flash lamp 11 is disposed such that the direction toward the front of the guide light becomes the optical axis 22a of the emitted light. On the other hand, the white light emitting diode lamp 23 disposed on the left side of the lamp 22 is disposed such that the direction inclined 30 degrees to the left side with respect to the optical axis 22a of the lamp 22 becomes the optical axis 23a of the emitted light. Have been. These white light emitting diode lamps 22 and 23 are also narrow angle light emitting diodes, and their lamp lenses 22b and 23b are provided with a coating for cutting visible light components of 500 nm or less. Further, in addition to the white light emitting diode lamp, a yellow light emitting diode may be used.
[0026]
FIG. 3 is a schematic block diagram showing a control circuit built in the control board 9 of the guide light 1 of this embodiment. The control circuit 40 includes an illuminance detection unit 41, a switching circuit 42, and a light emission control circuit 43. The illuminance detector 41 is for detecting the illuminance of the place where the guide light 1 is installed, and includes a detection circuit 45. The detection circuit 45 monitors the amount of power generated by the solar panel 6, and switches the switching signal when the amount of power generation falls below a predetermined reference amount, in other words, when the illuminance falls below a predetermined illuminance level. Output to the circuit 42. Upon receiving this switching signal, the switching circuit 42, which is normally held in the off state, switches on. For example, the switching circuit 42 is turned on when the power becomes 40 lux or less.
[0027]
In this example, the illuminance detection is performed indirectly based on the amount of power generated by the solar panel 6, but instead, a light / dark detection sensor or an illuminance sensor may be separately provided, and the illuminance detection may be performed based on the output.
[0028]
Next, in this example, a solar panel (solar cell) 6 is provided as a battery power supply, and a secondary battery 8 charged by the solar panel 6 is provided. As described above, the solar panel 6 receives light from an illuminating lamp, an advertising lamp, and the like, and the generated electromotive force is stored in the secondary battery 8. Power is supplied from the secondary battery 8 to the illuminance detector 41, the switching circuit 42, and the light source lamp 7 (flash lamp 11, white light emitting diodes 21, 22, and 23).
[0029]
When the switching circuit 43 is off, the power supply circuit is shut off, and the light source lamp 7 does not emit light. When the illuminance at the place where the guide light is installed is reduced to 40 lux or less, the switching circuit 42 is turned on, a power supply circuit is formed, and the light source lamp 7 emits light under the control of the light emission control circuit 43.
[0030]
FIG. 4 is a timing chart showing the light emission state of the flash lamp 11 and the three white light emitting diodes 21, 22, and 23. As shown in FIG. 4A, the flash lamp 11 generates a short flash light L (11) of 0.1 to 0.2 ms at a constant interval T1 (flash emission). On the other hand, as shown in FIG. 4B, the three white light emitting diode lamps 21, 22, and 23 are controlled to emit light alternately with the flash lamp 11. The white light emitting diodes 21 to 23 of this example have an on / off duty ratio of 50%, and are on / off controlled in the same cycle T1 as that of strobe light emission. The emission control of the flash lamp 11 and the white light emitting diode lamps 21, 22, and 23 is performed by the emission control circuit 43.
[0031]
(Other embodiments)
In the above-described example, the guide light has the coating layer 3b formed on the entire surface of the transparent cover 3. Alternatively, the coating layer 3b may be formed only on the transparent cover 3 covering the front surface of the light source lamp 7 and the transparent cover 3 covering the front surface of the solar panel 6. In the case where an illuminance sensor is provided, the coating layer 3b may be formed on a portion facing the light receiving surface of the illuminance sensor.
[0032]
Next, as shown in FIG. 5, when the light receiving surface 6a of the solar panel 6 is horizontally arranged in an upward state, a coating layer is formed on the surface of the portion 3B of the transparent cover 3A covering the light receiving surface 6a. 3b may be formed. Furthermore, if the shape of this portion is a parabolic cross section protruding upward and the angle θ of the tangent drawn on the surface thereof is 45 ° or more except for the tip portion, the portion of the transparent cover portion 3B can be formed. Dust attached to the surface easily falls naturally. Therefore, the occurrence of dirt on this portion can be suppressed.
[0033]
【The invention's effect】
As described above, in the guide light of the present invention, a coating layer having a self-cleaning property is formed on at least a part of the surface of the transparent cover. By forming the coating layer, it is possible to prevent dust and the like from adhering and accumulating on the surface of the transparent cover, thereby lowering the transparency. As a result, the surface of the transparent cover can be maintained in a clean state for a long period of time, so that the amount of light emitted from the guide light due to dirt on the transparent cover, the amount of power generated by the built-in solar panel, or the built-in illuminance can be reduced. A malfunction of the sensor can be prevented.
[0034]
Further, in the guide light of the present invention, the portion of the transparent cover facing the light source lamp, the solar panel, or the illuminance sensor is formed as an inclined surface or a convex curved surface inclined at 45 degrees or more with respect to the horizontal direction. Therefore, dust or the like that has fallen on the portion of the transparent cover is likely to fall naturally, so that accumulation of dust and the like can be suppressed. Therefore, the surface of the transparent cover can be kept in a clean state for a long time by the synergistic effect with the self-cleaning effect of the coating layer.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where a guide light to which the present invention is applied is partially cut out.
2A is a front view showing the guide light of FIG. 1 with a transparent cover cut out, FIG. 2B is a longitudinal sectional view of the guide light of FIG. 1, and FIG. 2C is a view of the guide light of FIG. FIG. 3 is a schematic cross-sectional view showing a main part.
FIG. 3 is a schematic block diagram showing a control circuit of the guide light of FIG. 1;
FIG. 4 is a timing chart showing a light emitting operation of a light source lamp of the guide light of FIG. 1;
FIG. 5 is an explanatory view showing another example of the transparent cover of the guide light.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 guide light 2 guide light main body 2A mounting plate 3, 3A transparent cover 3a transparent cover surface 3b coating layer 4 light source lamp unit 5 unit case 6 solar panel 7 light source lamp 8 secondary battery 11 flash lamp 11a main optical axis 12 light bulb 13 Reflector 14 Front cover 14a Optical filters 21, 22, 23, 24, 25 White light emitting diode lamps 21a to 25a Optical axes 21b to 23b Lamp lens 41 Illuminance detector 42 Switching circuit 43 Light emission control circuit

Claims (8)

A guide light body including a light source lamp, a transparent cover attached to the guide light body, and a coating layer formed on at least a part of the surface of the transparent cover;
The guide light, wherein the coating layer has a self-cleaning property capable of oxidatively decomposing organic substances attached to the surface of the coating layer. In claim 1,
The guide light, wherein the coating layer is a coating layer made of a photocatalyst such as a titanium dioxide photocatalyst. In claim 2,
The guide light, wherein the coating layer is a coating layer made of a photocatalyst that exerts a catalytic action when exposed to a visible light component. In claim 1, 2 or 3,
The guide light, wherein the coating layer is formed at least on a surface portion of the transparent cover facing upward from a horizontal direction. In claim 4,
The guide light, wherein the surface portion is a flat surface or a convex curved surface inclined at an inclination angle of 45 degrees or more with respect to a horizontal direction. In any one of claims 1 to 5,
An induction lamp, wherein the coating layer is formed on a portion of the transparent cover facing the light source lamp. In claim 6,
The guide light main body includes a battery power supply for supplying driving power to the light source lamp, and the battery power supply includes a solar panel that performs a power generation action by external light incident through the transparent cover,
The guide light, wherein the coating layer is formed on a portion of the transparent cover facing the solar panel. In claim 6 or 7,
The guide light body includes an illuminance sensor that detects illuminance based on external light incident through the transparent cover,
The guide light, wherein the coating layer is formed on a portion of the transparent cover facing a light receiving surface of the illuminance sensor.

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