JP2013058397A - Street light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a street light including an LED light source capable of obtaining desired brightness and light distribution.SOLUTION: The street light 10 includes a light body 2, a pole 3 raised on the ground and supporting the light body 2. The light body 2 includes a circular light source 20 supported by the pole 3 and a center light source 10 arranged at the center of the circular light source 20.

Description

  The present invention relates to a street light provided with an LED light source.

With the recent increase in output and life of LED light sources, lighting fixtures employing LED light sources as light sources are becoming popular. There is no exception in the street light that illuminates the ground by supporting the lamp body containing the light source on an outdoor pole, and various LED street lights that employ an LED light source as the light source have been proposed (for example, Patent Documents). 1).
In an LED street light that uses an LED light source as a light source, for example, in order to obtain brightness equivalent to that of a fluorescent mercury lamp, it is necessary to attach a large number of LED light sources to a lamp and to dissipate heat from the LED light source. There was a lamp, the lamp was enlarged, and the design was limited. For this reason, there has been proposed an LED lighting fixture that is compact in size by forming a fixture body in a frame shape and obtaining a wide range of light distribution with a small number of LED light sources (see, for example, Patent Document 2).

JP 2008-218182 A JP 2010-170954 A

However, in order to obtain a wide range of light distribution, the LED light source is provided at a position distant from the pole in the radial direction, so that the minimum illuminance cannot be ensured near the pole and it becomes dark. A light distribution equivalent to that of a mercury lamp could not be obtained.
This invention is made | formed in view of the situation mentioned above, and aims at providing a street lamp provided with the LED light source which can obtain desired illumination intensity and light distribution.

  In order to achieve the above object, the present invention provides a street light having a lamp body and a pole that is erected from the ground and supports the lamp body, and the lamp body is annularly supported by the pole. A light source and a central light source disposed in the center of the annular light source are provided.

  Further, the present invention provides the street light as described above, wherein a plurality of legs are extended from the top of the pole so as to support the annular light source substantially horizontally, and a plurality of arms are extended from the annular light source toward the annular center to thereby extend the central light source. It is characterized by supporting.

  Further, the present invention is characterized in that, in the street lamp, a gap having a size for separating light emission of the central light source and light emission of the annular light source is provided between the central light source and the annular light source. To do.

  In the street light, the present invention is characterized in that an electric wire extending from the pole is wired to the central light source through the arm extending from the annular light source.

  In the street light, the present invention is characterized in that the central light source and the annular light source can be selectively lit.

  According to the present invention, a street light having a lamp body and a pole standing from the ground and supporting the lamp body, the lamp body including an annular light source supported by the pole, and the annular light source A central light source disposed at the center of the light source, so that a desired illuminance and light distribution can be obtained using an LED light source, such as illuminating the vicinity of the pole with the light emission of the central light source and the wide area with the light emission of the annular light source. .

It is a figure which shows the structure of the street lamp which concerns on embodiment of this invention. It is a figure which shows the lighting pattern of a street lamp. It is a top view of a street light. It is a bottom view of the state which removed all the gloves of the lamp body. It is a bottom view of the lamp body in a state where a part of the globe of the annular light source is removed. It is sectional drawing of an annular light source. It is a disassembled perspective view which shows the LED unit of an annular light source.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, directions such as up and down are directions corresponding to the installation state.
FIG. 1 shows a configuration of a street light 1 according to the present configuration. FIG. 1 (A) is a top perspective view and FIG. 1 (B) is a bottom perspective view. The street light 1 is provided with a lamp body 2 fixed coaxially to the pole 3 on a top 3A of a pole 3 standing on the outdoor ground. The lamp body 2 includes a cylindrical mounting bracket 4 that is inserted into and fixed to the top 3 </ b> A of the pole 3, and a light source 6 is supported on a tripod 5 provided on the mounting bracket 4. The light source 6 includes an annular light source (second light source) 20 on a ring in plan view supported by the tripod 5, and a central light source (first light source) supported by three arms 30 at the center of the annular light source 20. Light source) 10.

  The street light 1 can selectively turn on the central light source 10 and the annular light source 20 as shown in FIG. 2. For example, as shown in FIG. The lighting pattern A for turning on both the annular light sources 20 or the lighting pattern B for turning on only the central light source 10 as shown in FIG. 2B can be used according to time, season, or the like. The street lamp 1 is configured to be lit with various lighting patterns other than the lighting pattern shown in FIG. 2, and the dimming of the central light source 10 and the annular light source 20 can be controlled separately. According to this configuration, the street light 1 can be provided with many brightness variations by separately controlling the lighting, dimming, and extinguishing of the central light source 10 and the annular light source 20. It can be used according to the brightness, time zone, and usage. As a result, in times when there is little traffic such as late at night, the central light source 10 and the annular light source 20 can be turned on, dimmed, and turned off to reduce the brightness and save energy.

In addition, since the central light source 10 and the annular light source 20 can be controlled to be turned on, dimmed, and turned off separately, even if one of the light sources stops lighting due to a failure, the other light source is normally turned on. Can be used.
Further, the street lamp 1 can change the light colors of the two light sources of the central light source 10 and the annular light source 20 to any light colors such as a light bulb color, white color, blue color, and green color. And can be used according to the intended use.

Hereinafter, the configuration of the street light 1 will be described in detail.
As shown in FIG. 1, the street light 1 supports a lamp body 2 on a pole 3 and turns on a light source 6 of the lamp body 2 to irradiate the ground. Although not shown in the figure, the pole 3 includes a ballast for supplying power to the lamp body 2 to turn on the light source, and a wire that is formed in a hollow shape and supplies power to the lamp body 2. It is wired to the lamp body 2 through the hollow portion. The lamp body 2 has a tripod 5 that supports the light source 6 and an arm 30 that supports the central light source 10 and is formed into a hollow shape by casting using an aluminum alloy or the like, and the lamp body through the hollow portion of the pole 3. The wires wired to 2 pass through the tripod 5 and the inside of the arm 30 and are wired to the annular light source 20 and the central light source 10. According to this configuration, the electric wires can be wired without impairing the design so that they cannot be seen from the outside of the street lamp 1.

  As shown in FIG. 3, the central light source 10 is a light source having a circular shape in plan view centered on the axis of the pole 3, and the annular light source 20 is a circular light source in plan view surrounding the central light source 10. . The light source 6 includes a gap S between the central light source 10 and the annular light source 20. The gap S is configured to have such a size that the light emission of the central light source 10 and the light emission of the annular light source 20 appear to be separated when both the central light source 10 and the annular light source 20 are turned on. The gap S is formed in an appropriate size between 10 mm and 120 mm according to the dimensions of the street lamp 1. Further, the light source 6 is configured such that the ratio of the gap S and the width W between the outer periphery and the inner periphery of the annular light source 20 is 1: 2 or more.

  As shown in FIG. 1, the central light source 10 includes a frustoconical first light source support 11 and an inverted frustoconical first globe 12 that is fixed to the first light source support 11 and extends downward. Prepare. The 1st light source support 11 is formed by casting etc. using the aluminum alloy etc. which was excellent in heat dissipation, and is formed in the hollow shape which a lower bottom opens. An LED unit 13, which will be described in detail later, is thermally connected and fixed to the upper surface 11 </ b> A of the first light source support 11 on the lower surface, that is, inside the first light source support 11. Moreover, the 1st light source support body 11 is provided with the cover part 16 which hangs down substantially perpendicularly along the circumferential direction at the edge of the lower base 11B.

  The first globe 12 is formed of a polycarbonate resin or the like having excellent strength, and has an upper base that is substantially the same diameter as the lower base of the first light source support 11 and a hollow shape that opens the upper base. The Further, the first globe 12 is formed such that the inclination angle of the side surface is substantially the same as the opening angle of each leg of the tripod 5. Although not shown, a plurality of boss portions are provided along the conical surface inside the first globe 12. The central light source 10 supports and fixes the LED unit 13 on the first light source support 11, and the first light source support 11 is surrounded by the cover 16 so as to surround the edge of the upper base of the first globe 12. 12 is configured. According to this configuration, it is possible to prevent the rainwater or the like from entering the inside of the central light source 10 from between the first light source support 11 and the first globe 12 by covering with the cover 16.

  A screw hole 19 is provided on the conical surface of the first light source support 11 at a position corresponding to a boss portion (not shown) formed inside the first globe 12. The first light source support 11 and the first globe 12 are fixed to the screw hole 19 and the screw 18 passed through the boss portion from above the first light source support 11. According to this configuration, since the screw 18 is screwed into the boss formed inside the first globe 12 from above the first light source support 11 through the screw hole 19, the lamp body 2 is attached to the pole. 3, the fixing structure such as the boss portion 17, the screw 18, and the screw hole 19 that fixes the first light source support 11 and the first globe 12 to the ground as shown in FIG. The design of the street lamp 1 is not impaired.

The annular light source 20 is an annular light source centered on the axis of the pole 3, and includes a ring body 21 and a second globe 22 that is detachably provided on the ring body 21. The annular light source 20 is supported substantially horizontally by a plurality of legs (tripods) 5 extending from the top 3 </ b> A of the pole 3. Each leg 5 extends from the axis of the pole 3 toward the outer peripheral side of the annular light source 20 at a predetermined opening angle.
The ring body 21 forms the upper side of the annular light source 20 and is formed by casting or the like using an aluminum alloy or the like having excellent heat dissipation. A second LED unit 28, which will be described in detail later, is thermally connected and fixed to the lower surface of the ring body 21.

  As shown in FIG. 1A, the ring body 21 is formed with a screw hole through which a screw 26 for fixing the tripod 5 from above the ring body 21 is passed. A plurality of heat radiation fins 24 are provided in a roulette shape on the inner peripheral side 23 of the ring body 21. The heat radiating fins 24 are configured so as not to be seen from the lower side or the outer peripheral side of the annular light source 20. According to this configuration, heat generated from a second LED unit described later included in the annular light source 20 can be dissipated through the radiation fins 24. In addition, as shown in FIG. 1 (B), the radiating fins 24 are configured to be invisible from the lower side or the outer peripheral side of the annular light source 20, so that the radiating fins 24 are exposed to the outside. The design of the street light 1 is not impaired.

Moreover, since the radiation fin 24 is provided on the inner peripheral side 23 of the upper surface of the ring body 21 and a gap S is provided between the central light source 10 and the annular light source 20, Wind passes between the light source 10 and the annular light source 20, whereby heat can be efficiently radiated from the radiation fins 24 by the wind passing through the gap S.
Further, from the inner peripheral side 23 of the ring body 21, the above-described arms 30 extend toward the annular center at equal intervals. On the outer peripheral side and inner peripheral side edge of the ring body 21, a covered portion 25 is provided that hangs downward substantially vertically.

  The second globe 22 forms the lower side of the annular light source 20 and is made of polycarbonate resin or the like having excellent strength. The second globe 22 is divided into at least three globe members 22A, 22B, and 22C so as to be attachable between the legs of the tripod 5. The globe members 22A, 22B, and 22C are arranged between the legs of the tripod 5 with their upper ends disposed inside the covered portion 25 of the ring body 21. Moreover, the 2nd globe 22 is comprised so that it can fix with the screw 27 from the upper direction of the ring body 21, as shown to FIG. 1 (A). According to this configuration, since the upper end of the second globe 22 can be covered with the covered portion 25, rainwater and the like enter the inside of the annular light source 20 from the gap between the ring body 21 and the second globe 22. Can be prevented. Further, the fixing structure such as the screw 27 for fixing the second globe 22 to the ring body 21 can be hidden from the lower side of the annular light source 20, and the design of the street lamp 1 is not impaired.

  FIG. 4 is a bottom view of the lamp body 2 with the first globe 12 and the second globe 22 removed. As shown in FIG. 4, the LED unit 13 is fixed to the lower surface of the first light source support 11 of the central light source 10. In the LED unit 13, four LEDs 15 are arranged at equidistant intervals in a substantially concentric manner on an LED substrate 14 that is a disk-shaped circuit board. The number and arrangement of the LEDs 15 arranged on the LED substrate 14 can be any arrangement as long as necessary illuminance is ensured and illuminance unevenness does not occur. The LED 15 is fixed to the LED substrate 14 by an LED mounting jig 15A. Thus, the central light source 10 illuminates the street lamp 1 with direct light and diffused light emitted from the LED 15 without using a reflecting mirror. For example, when the brightness of the street lamp 1 is reduced and the energy saving property is improved in a time zone where there is little traffic such as late at night, only the central light source 10 can emit light, and the central light source 10 has a large light emitting surface. Therefore, the brightness around the street lamp 1 can be kept even during dimming.

  The tripod 5 is fixed to the lower surface 21A of the ring body 21 of the annular light source 20. The tripod 5 is formed, for example, by casting an aluminum alloy that is excellent in heat dissipation as with the ring body 21, and a mounting surface (not shown) of the tripod 5 is mounted in contact with the lower surface 21 </ b> A of the ring body 21. The second LED unit 28 is fixed to the lower surface 21A. The second LED unit 28 is divided into three, and each LED unit 28A, 28B, 28C is disposed between each leg of the tripod 5, respectively. As shown in FIG. 5, the second globe 22 is provided with each of the globe members 22A, 22B, and 22C so as to be detachable separately. During the maintenance of the LED units 28A, 28B, and 28C, the globe members 22A and 22B are provided. , 22C, only the corresponding glove can be removed for work.

6 and 7 are diagrams showing the annular light source 20 and the LED unit 28 of the annular light source 20, and the configuration of the annular light source 20 will be described in detail below with reference to FIGS.
The annular light source 20 is formed in a diamond shape in cross section. Thereby, reduction of the wind pressure load which the annular light source 20 receives and weight reduction can be achieved. Further, since rain and dust on the surface can easily flow, contamination can be prevented.
The ring body 21 is formed in a cross-sectional triangle, and the lower surface 21A is formed substantially parallel to the horizontal plane. Further, the above-described heat dissipating fins 24 are provided integrally with the ring body 21 on the inner peripheral side 23 of the ring body 21.

  The second LED unit 28 is attached to the lower surface 21A. The second LED unit 28 is attached with a later-described LED substrate 31 that is thermally connected horizontally to a lower surface 21A substantially parallel to the horizontal plane. The second LED unit 28 includes an LED 32 that emits light immediately below. Heat generated from the second LED unit 28 is transferred to the ring body 21 via the LED substrate 31 and is radiated from the surface of the ring body 21 to the outside air. Since the ring body 21 is provided with the radiation fins 24 as described above, the heat dissipation is improved, and the heat generated from the second LED unit 28 can be efficiently radiated from the ring body 21. Further, since the heat radiating fins 24 are provided on the upper inner peripheral side 23 of the annular light source 20 having a diamond-shaped cross section, the heat radiating fins 24 should be arranged so that they cannot be seen from the streets regardless of the distance from the street light 1. Therefore, the heat dissipation of the annular light source 20 can be enhanced without impairing the design.

  In each LED unit 28A, 28B, 28C, four LEDs 32 are arranged on the LED substrate 31 which is a plate-like circuit board along the shape of the ring body 21 at equal intervals in the circumferential direction. The number and arrangement of the LEDs 32 arranged on the LED substrate 31 may be any arrangement as long as necessary illuminance is ensured and illuminance unevenness does not occur. The LED 32 is bonded to the LED substrate 31 by the adhesive sheet 32 </ b> A and is fixed to the LED substrate 31 by the LED mounting jig 34.

  The LED mounting jig 34 is formed in a substantially rectangular shape, and has an opening at which the LED 32 is disposed at a substantially central position. The LED attachment jig 34 is provided with two leg portions 34A, and the leg portions 34A are provided diagonally to each other. The LED board 31 is previously provided with a hole 37 at a position corresponding to the leg 34 </ b> A, and the leg 34 </ b> A is inserted into the hole 37 to fix the LED 32 to the LED board 31. The LED substrate 31 is provided with a reflecting mirror 35 provided for each LED 32 individually.

The reflecting mirror 35 irradiates light radiated directly from the LED 32 toward the radial direction of the annular light source 20. The reflecting mirror 35 is configured to irradiate light emitted from the LED 32 in the horizontal direction H and a predetermined range α downward from the horizontal direction H. As described above, the annular light source 20 directly irradiates the light emitted from the LED 32 in an arbitrary direction using the reflecting mirror 35, and illuminates the street light 1 aiming at a relatively far distance.
The reflecting mirror 35 is integrally provided with a reflector 35A that irradiates light emitted from the LED 32 in a predetermined direction, and a mounting portion 35B that is disposed at a position aimed at the reflector 35A and fixed to the LED substrate 31. The attachment portion 35B is provided with positioning pins 35C for positioning the reflecting mirror 35 with respect to the LED substrate 31. Although the positioning pin 35C is not shown, a hook or the like is formed at the tip, and the reflecting mirror 35 is inserted into the reflecting mirror fixing hole 38 provided in advance on the LED substrate 31. , It is fixed to the LED substrate 31 by a snap fit. The reflecting mirror 35 may be configured to be fixed by another method such as fixing with a screw in addition to the configuration of being fixed to the LED substrate 31 by snap fitting.

  The reflecting mirror 35 rotates clockwise or counterclockwise from the first position 38A in addition to the first position 38A that irradiates light emitted directly from the LED 32 toward the radial direction of the annular light source 20. It is configured to be attachable to the second position 38B or the third position 38C shifted in the horizontal direction by approximately 90 degrees. The LED substrate 31 is provided with reflecting mirror fixing holes 38 at positions corresponding to the positions 38A, 38B, and 38C. As described above, the reflecting mirror 35 can be fixed at three different positions 38A, 38B, and 38C so as to swing the head around the LED 32. Therefore, each of the plurality of reflecting mirrors 35 is oriented in an arbitrary direction simply by inserting the positioning pin 35C of the reflecting mirror 35 into the predetermined reflecting mirror fixing hole 38 according to the direction in which the light emitted from the LED 32 is desired to be directed. The light distribution of the street lamp 1 can be easily changed.

  As described above, according to the embodiment to which the present invention is applied, there is a street light 10 having the lamp body 2 and the pole 3 that is erected from the ground and supports the lamp body 2. The annular light source 20 supported by the pole 3 and the central light source 10 disposed at the center of the annular light source 20 are provided. Thereby, for example, the vicinity of the pole 3 can be illuminated by the light emission of the central light source 10 and a wide range can be illuminated by the light emission of the annular light source 20, and desired illuminance and light distribution can be obtained.

  According to the embodiment to which the present invention is applied, the plurality of legs 5 are extended from the top of the pole 3 to support the annular light source 20 substantially horizontally, and the plurality of arms 30 are extended from the annular light source 20 toward the annular center. Since the central light source 10 is supported, the annular light source 20 attached in a state of spreading outward from the top of the pole 3 can be stably supported by the plurality of legs 5 on the pole 3. Strength can be increased. Further, since the central light source 10 is supported by a plurality of arms 30 extending from the annular light source 20 toward the annular center, the central light source 10 can be separated from the pole 3 and stably supported by the annular light source 20.

  Moreover, according to the embodiment to which the present invention is applied, the gap S having a size for separating the light emission of the central light source 10 and the light emission of the annular light source 20 is provided between the central light source 10 and the annular light source 20. Wind can flow through the gap S, and the wind load on the light source 6 can be reduced. Further, when the central light source 10 and the annular light source 20 are turned on, the light emission from the central light source 10 and the light emission from the annular light source 20 are separated, and whether the central light source 10 is floating in the air. Since it looks like this, the design property at the time of lighting of the street lamp 1 can be improved.

  Further, according to the embodiment to which the present invention is applied, since the electric wire extending from the pole 3 is wired to the central light source 10 through the arm 30 extending from the annular light source 20, the gap S is provided between the central light source 10 and the annular light source 20. However, the electric wire to the central light source 10 can be wired so as not to be seen from the outside of the street lamp 1, and the design of the street lamp 1 is not impaired.

  Further, according to the embodiment to which the present invention is applied, since the central light source 10 and the annular light source 20 can be selectively turned on, for example, the central light source 10 and the annular light source 20 are turned on according to the time zone. You can change the pattern. Therefore, the brightness of the street lamp 1 can be reduced by turning on only the central light source 10 or the like, for example, at night when there is little traffic of people such as midnight, and the energy saving performance of the street lamp 1 can be improved.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to this. In the present embodiment, the central light source 10 is a light source having a circular shape in a plan view, and the annular light source 20 is a light source having a circular shape in a planar view surrounding the central light source 10. As for the shape of the annular light source 20, in addition to a circular / annular shape, each may be formed in a different shape or a polygon / angular shape such as a triangle or a quadrangle having the same shape.

DESCRIPTION OF SYMBOLS 1 Street light 2 Lamp body 3 Pole 6 Light source 10 Central light source 20 Annular light source 30 Arm S Gap

Claims (5)

A street light having a lamp body and a pole standing from the ground and supporting the lamp body,
The streetlight is characterized in that the lamp body includes an annular light source supported by the pole and a central light source disposed at the center of the annular light source.   2. A plurality of legs are extended from the top of the pole to support the annular light source substantially horizontally, and a plurality of arms are extended from the annular light source toward an annular center to support the central light source. Street light as described in.   The street light according to claim 1 or 2, wherein a gap having a size for separating the light emission of the central light source and the light emission of the annular light source is provided between the central light source and the annular light source. .   The street light according to claim 2 or 3, wherein an electric wire extending from the pole is wired to the central light source through the arm extending from the annular light source.   The street light according to any one of claims 1 to 4, wherein the central light source and the annular light source can be selectively turned on.