JP2003068101A - Underground lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water dew generated inside a luminaire underground box from dropping on an illuminating lamp and the like. SOLUTION: An underground lighting system comprises the luminaire underground box 2 provided with a translucent part 1 at a top surface and buried in the underground, a concave mirror 4 arranged in a substantially central position of a bottom surface and internally mounted with the illuminating lamp 3 to reflect light of the illuminating lamp 3 upward, and a lighting device 5 including the concave mirror 4. The translucent part 1 is swollen upward. An upper surface of the concave mirror 4 between an open end of the concave mirror 4 and the illuminating lamp 3 is provided with a cannel portion encircling the illuminating lamp 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground illuminating device which is embedded in an outdoor ground such as a park or a sidewalk for lighting.

[0002]

2. Description of the Related Art As a conventional example of this type, there is, for example, the one disclosed in Japanese Patent Laid-Open No. 10-255540. This is an underground illuminating device that is embedded in an outdoor ground such as a park or sidewalk and lights up.For example, planting in parks or shrines or in sidewalks on both sides such as main roads. To illuminate at night.

In this underground illuminating device,
A concave mirror that has an illuminating lamp inside and that reflects the light of the illuminating lamp upward is provided. For example, when such an underground illuminating device is installed on both sides of a road, driving of a car is performed. It is also possible to replace the concave mirror and change the range illuminated by the underground illuminating device in order to prevent the person from feeling uncomfortable glare.

Further, in such an underground illuminating device used outdoors, dew condensation water is inevitably generated due to the temperature difference between the inside and the outside of the luminaire housing box.
In the one described in Japanese Patent Application Laid-Open No. 10-255540, the dew condensation water generated inside the lighting equipment buried box is collected in the water collecting portion provided on the bottom surface of the lighting equipment buried box. When the water level of the water exceeds the reference value, the power of the lighting device is shut off, and at the same time, it is notified to the outside to prevent the water from adversely affecting the lighting device.

[0005]

However, when the illuminating lamp is turned on and the temperature of the outer tube of the illuminating lamp is rising, dew condensation water is generated on the upper surface of the luminaire buried box facing the illuminating lamp. However, when the condensed water falls on the lighting, it may adversely affect the lighting. Further, if the condensed water falls into the concave mirror and flows down to the bottom surface along the outer wall of the concave mirror, and the condensed water reaches the main body of the lighting device, it may adversely affect the entire lighting device. In particular, the temperature of the illuminating lamp has risen, and if the illuminating lamp is exposed to condensed water having a temperature difference from the outer tube of the illuminating lamp, the illuminating lamp may be damaged.

[0006]

According to a first aspect of the present invention, there is provided an underground illuminating device, wherein an upper surface of the illuminating device is buried in the ground with a transparent portion, and a bottom surface of the illuminating device is disposed substantially in the center. And a concave mirror that has an illuminating lamp inside thereof and reflects the light of the illuminating lamp upward, and an illuminating device that includes the illuminating lamp and the concave mirror, and in the underground embedded illuminating device, the translucent portion is directed upward. It is characterized by being bent.

In such an underground illuminating device, even when dew condensation water is generated on the upper surface of the luminaire embedded box facing the illuminating lamp, the dew condensation water is bulged upward. Since it flows down along the section, it is possible to prevent the condensed water from falling on the illumination lamp.

An underground illuminating device according to claim 2 is the underground illuminating device according to claim 1, wherein
A groove is provided on the upper surface of the concave mirror between the opening end of the concave mirror and the lighting lamp so as to surround the lighting lamp.

In such an underground illuminating device, even when the condensed water falls into the concave mirror, the condensed water is formed in the groove provided on the upper surface of the concave mirror between the opening end of the concave mirror and the illumination lamp. Since the condensed water does not reach the main body of the lighting device such as a lighting lamp, it is possible to prevent adverse effects on the lighting device.

The underground embedded lighting device according to claim 3 is the underground embedded lighting device according to claim 2, wherein
It is characterized in that the groove is provided with a drainage hole.

In such an underground illuminating device, condensed water can be drained through the drain hole without collecting in the groove. Further, even if a large amount of dew condensation water is generated in the lighting equipment buried box and collects in the groove, the dew condensation water does not overflow from the groove and can be quickly drained.

An underground illuminating device according to a fourth aspect is the underground illuminating device according to the third aspect,
It is characterized in that a water guide pipe is connected to the drainage hole.

In such an underground illuminating device, since the water guide pipe is connected to the drain hole, the condensed water from the groove is drained to a desired place, for example, the bottom surface of the lighting equipment burying box. be able to.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. (The first embodiment corresponds to claim 1.) An underground illuminating device shown in FIG. 1 includes a luminaire burying box 2 whose upper surface is embedded in the ground by a light transmitting portion 1. , A concave mirror 4 which is arranged substantially in the center of the bottom surface and has an illuminating lamp 3 therein and which reflects the light of the illuminating lamp 3 upward, and an illuminating device 5 comprising the illuminating lamp 3 and the concave mirror 4.
And a fixture 6 for fixing the translucent portion 1 to the lighting equipment buried box 2.

The translucent portion 1 is made of a material such as glass and bulges upward. The material of the lighting fixture buried box 2 is, for example, a stainless steel plate and has a cylindrical shape.
In order to prevent water vapor or the like from entering the interior of the lighting equipment embedded box 2, synthetic rubber packing may be inserted around the light-transmissive portion 1 and the top surface of the illumination equipment embedded box 2. As the illuminating lamp 3, incandescent lamps include general illuminating lamps and halogen lamps, low-pressure discharge illuminating lamps include fluorescent illuminating lamps and low-pressure sodium illuminating lamps, and high-pressure discharge illuminating lamps include mercury illuminating lamps, metal halide illuminating lamps, and It may be a high pressure sodium lighting lamp or the like. The material of the concave mirror 4 is a metal plate here, but may be, for example, quartz glass, hard glass, or heat resistant synthetic resin. The shape of the concave mirror 4 is a conical cross-section with a substantially concave shape in conformity with the shape of the embedded box 2 for a lighting fixture. The lighting device 5 includes a ballast for turning on the lighting lamp 3 and wiring therein. The material of the fixture 6 is metal such as stainless steel.

When the illumination lamp 3 is, for example, a halogen bulb, the bulb temperature of the halogen bulb is 15 during normal lighting.
It becomes about 0 to 250 ° C. At this time, even if dew condensation water is generated on the upper surface of the lighting fixture buried box 2 facing the lighting lamp 3, the dew condensation water is bulged upward as shown in FIG. Moves along the inner surface of the translucent portion 1 and does not fall on the illumination lamp 3. Therefore, the illumination lamp 3 is not damaged. Further, since the translucent portion 1 covers the entire upper surface of the lighting equipment buried box 2, the translucent portion 1 is larger than the diameter of the concave mirror 4 and the condensed water is used for the concave mirror 4.
It does not fall inside. As a result, it is possible to prevent a ballast, etc. in the lighting device 5 from being damaged and prevent a ground fault, a decrease in withstand voltage, an electric shock, and the like.

The shape of the lighting equipment embedded box 2 may be a square pole, and the shape of the concave mirror 4 may be adapted to it.

FIG. 4 shows the case where the present invention is installed, for example, in a park, and is used when the beauty of the planting 10 is not impaired or when the surroundings are not bright enough at night only by the lighting columns. Is shown. Of course, you may install it in the sidewalks on both sides of the main road, or you may light the shrines and temples at night. Further, it may be arranged along the width of a road or a bridge, or a decorative building or the like may be illuminated at night. Further, it may be used as a guide light or a sign light on a runway of an airfield or a general road.

A second embodiment of the present invention will be described below with reference to FIG. (The second embodiment corresponds to claims 1 and 2.) The underground buried illumination device shown in FIG. 2 is the same as the open end of the concave mirror 4 in the underground buried illumination device shown in FIG. A groove portion 7 for collecting condensed water is provided along the periphery of the illumination lamp 3 on the upper surface of the concave mirror 4 between the illumination lamp 3. In the underground illuminating device shown in FIG. 1, the condensed water generally falls outside the upper open end of the concave mirror 4, but as the condensed water moves to the end of the transparent portion 1, the condensed water accumulates and the concave mirror 4 is formed. May fall inside the open end of the top surface of the. Further, the curvature ratio of the light transmitting portion 1 decreases as it goes to the end of the light transmitting portion 1. Therefore, before the condensed water reaches the end of the light transmitting portion 1, the condensed water drops and the upper open end of the concave mirror 4 is exposed. It becomes easy to fall inside.

Even in such a case, since the groove portion 7 is provided in the concave mirror 4, the condensed water that has fallen into the concave mirror 4 has the groove portion 7.
It is possible to prevent a ground fault, a decrease in dielectric strength, an electric shock, etc. without damaging the ballast and the like in the lighting device 5 by collecting in

The constitutions and effects not described above are the same as those of the first embodiment.

The third embodiment of the present invention will be described below with reference to FIG. (The third embodiment corresponds to claims 1 to 4.) The underground buried lighting device shown in FIG. 3 is the underground buried lighting device shown in FIG. A water guide pipe 9 is provided in the hole 8 and the drain hole 8.

As a result, the condensed water collected in the groove 7 can be discharged to a desired place. The drainage place may be provided, for example, on the bottom surface of the lighting equipment buried box 2.

The constitutions and effects not described above are the same as those of the first and second embodiments.

[0025]

As described in detail above, in the underground illuminating device according to the first aspect of the present invention, since the light transmitting portion on the upper surface of the luminaire burying box is bulged upward, Even if dew condensation water is generated on the upper surface of the lighting equipment buried box facing the above, the dew condensation water flows down along the translucent part that is bulging upward, so that the dew condensation water does not fall on the lighting. Can be prevented.

In the underground illuminating device according to the second aspect, since the groove is provided along the periphery of the illuminating lamp, particularly on the upper surface of the concave mirror between the opening end of the concave mirror and the illuminating lamp, the dew condensation water is formed. Even when the water drops into the concave mirror, the condensed water collects in the groove portion provided in the concave mirror between the opening end of the concave mirror and the illumination lamp, and the adverse effect of the condensed water on the lighting device can be prevented.

In the underground illuminating device according to the third aspect, since the drainage hole is provided especially in the groove, the condensed water can be drained through the drainage hole without collecting in the groove. Further, even if a large amount of dew condensation water is generated in the lighting equipment buried box and collects in the groove, the dew condensation water does not overflow from the groove and can be quickly drained.

In the underground illuminating device according to claim 4, since the water guide pipe is connected to the drain hole,
Condensed water from the groove can be drained to a desired place, for example, the bottom surface of the lighting equipment buried box.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment.

FIG. 2 is a cross-sectional view showing a second embodiment.

FIG. 3 is a cross-sectional view showing a third embodiment.

FIG. 4 is an explanatory diagram showing a usage example of the first embodiment.

[Explanation of symbols] 1 Translucent part 2 Buried box for lighting equipment 3 lighting 4 concave mirror 5 Lighting equipment 7 groove 8 drainage holes 9 Water guide tube

Claims (4)

[Claims] 1. An embedded box for a lighting fixture, the upper surface of which is a translucent part and which is buried in the ground, and the lighting box which is disposed substantially in the center of the bottom surface and which has an illuminating lamp inside the illuminating lamp. An underground illuminating device including a reflecting concave mirror and an illuminating device including an illuminating lamp and a concave mirror, wherein the translucent portion is curved upward. 2. An underground illuminating device according to claim 1, wherein a groove is provided on the upper surface of the concave mirror between the opening end of the concave mirror and the illuminating lamp so as to surround the illuminating lamp. 3. The underground embedded lighting device according to claim 2, wherein a drainage hole is provided in the groove. 4. The underground illuminating device according to claim 3, wherein a water guide pipe is connected to the drain hole.