JP3160414U - Lighting device and street light - Google Patents

Abstract

[PROBLEMS] To properly perform gaze guidance and irradiation of a road surface while avoiding that light from a light source directly enters a pedestrian's gaze, and to sense high aesthetics from the illuminated light. Provide lighting devices and street lights. A translucent panel that extends vertically and is arranged in the circumferential direction of a vertical axis, a cap portion that closes an upper side of an internal space S partitioned by the translucent panel, and the cap portion The LED light source 50 is disposed inside the LED 40 and emits illumination light directed obliquely downward to the outside of the internal space S via the translucent panel 30, and the illumination light passes through the lower region of the translucent panel 30. A transparent portion 32 that transmits light is used, and a frost portion 31 that diffuses and transmits illumination light is used for the upper region. [Selection] Figure 6

Description

  The present invention relates to an illuminating device using a highly directional light source such as an LED light source or an HID light source, and a street lamp provided with the illuminating device.

  Conventionally, street lamps equipped with illumination devices such as incandescent lamps, fluorescent lamps and mercury lamps have been used as a wide range of illumination outdoors such as roads and parks. However, these lighting devices consume a large amount of power and have a short life span, so that the maintenance cost for replacing the bulbs is high. Therefore, in recent years, an attempt has been made to use an LED (light emitting diode) light source with low power consumption and a long life as a light source for a street lamp (see, for example, Patent Document 1).

JP 2008-258007 A

  By the way, in the street light using the said LED light source, since the directivity of the illumination light radiate | emitted from the said LED light source is strong, only the light intensity of a certain specific direction becomes large. Therefore, in the case of a street light having a configuration in which the LED light source can be directly visually recognized from the outside, the illumination light from the LED light source having a large light intensity directly enters the eyes of the pedestrian and feels glare. was there.

  In order to guide the pedestrian's line of sight with a street light, it is preferable that a light emitting area is spread around the upper portion of the street light. However, in the case of a street light using an LED light source, illumination light is locally Since the light is emitted, there is a problem in that the light emitting region cannot be formed, and the pedestrian cannot be guided smoothly.

Although it is conceivable to deal with this point, for example, by covering the entire LED light source with a diffusely transmissive member such as frosted glass, it is not preferable because the illuminance on the road surface decreases.
Moreover, as a street light, it is preferable not only to irradiate a target object but also to feel aesthetics from the irradiated light.

  The present invention has been made in view of such problems, and can appropriately perform line-of-sight guidance and road surface irradiation while avoiding light from a light source directly entering the eyes of a pedestrian. Furthermore, it aims at providing the illuminating device and street lamp which can sense high aesthetics from irradiated light.

In order to solve the above problems, the present invention provides the following means.
That is, the illumination device according to the present invention is an illumination device that illuminates the illumination target surface from above, and the upper side of the internal space partitioned by the translucent panel is closed. And a light source that is arranged inside the shade part and emits illumination light directed obliquely downward to the outside of the internal space through the translucent panel, the translucent panel, The lower region is a transparent portion that transmits the illumination light, and the upper region is a frost portion that diffuses and transmits the illumination light.

  According to the illuminating device having such a feature, light having a high directivity emitted obliquely downward from the light source is directly incident on the eyes of a person located on the illumination target surface, that is, light close to the horizontal direction. The obtained light is emitted outward while being diffused by the frost portion in the upper region of the translucent panel. Therefore, the illumination light whose light intensity is reduced is incident on the eyes, and it can be avoided that a person located on the illumination target surface feels glare.

  In addition, when light is diffused by the frost portion of the upper region of the translucent panel, a light emitting region having a soft spread can be formed around the upper region. Can sufficiently exhibit the function of guiding the line of sight to pedestrians.

  Further, among the highly directional light emitted obliquely downward from the light source, the light that is close to the vertical direction, that is, that contributes to the irradiation of the illumination target surface, passes through the transparent portion of the translucent panel. Therefore, diffusion and absorption of light by the translucent panel can be suppressed as much as possible, and the illumination target surface can be irradiated with high illuminance.

  As described above, soft light is emitted from the upper region of the translucent panel so as to spread, and clear light having a high light intensity is emitted from the lower portion of the translucent panel. In this way, when lights having different properties are adjacent to each other, it is possible to obtain irradiation light having a beautiful contrast woven by these lights.

  In the lighting device according to the present invention, an intermediate region between the transparent portion and the frost portion in the translucent panel is a gradation portion that gradually transitions from the transparent portion to the frost portion. preferable.

  In this way, the intermediate region between the transparent portion and the frosted portion has a gradation, so that the soft irradiation light emitted from the upper region of the translucent panel and the lower region are emitted. The boundary with the clear irradiation light becomes ambiguous. Thereby, these two lights can be naturally melted without a sense of incongruity, and the aesthetics can be made higher.

  In the lighting device according to the present invention, it is preferable that the internal space communicates with the outside of the internal space on the lower side.

  Thereby, since the light which goes to the downward direction of internal space among the light radiated | emitted from a light source is radiate | emitted so that it may leak outside, it can utilize effectively, without interrupting the said light. In addition, it is possible to promote air circulation to the internal space and suppress a temperature rise due to the light source. As a result, the lifetime of the light source can be extended, and the illuminating device itself can be miniaturized because heat is not locally accumulated. Furthermore, dust, insects and the like can be prevented from accumulating in the lighting device.

Further, in the lighting device according to the present invention, an opening is formed in a part of the shade, and illumination light directed obliquely upward is provided outside the shade via the opening. A second light source that emits in the direction may be provided.
Thereby, an upper target object can be irradiated according to the time when it is requested | required to light up diagonally upwards, such as the flowering time of a cherry tree, for example.

Furthermore, in the illumination device according to the present invention, it is preferable that the light source is composed of an LED light source or an HID light source.
Thereby, the irradiation light with strong directivity which aimed at the power-saving and long life of a light source is realizable.

A street lamp according to the present invention includes any one of the above lighting devices and a support column that extends in the vertical direction and supports the lighting device at an upper portion.
Accordingly, it is possible to appropriately illuminate the road surface while avoiding the pedestrian feeling glare.

  According to the illuminating device and the street lamp according to the present invention, the light from the light source is directly pedestrian by irradiating the irradiating light with strong directivity through the translucent panel having the transparent portion and the frost portion. It is possible to appropriately perform line-of-sight guidance and road surface irradiation while avoiding entering the eyes. Moreover, high aesthetics can be sensed by the irradiation light having different properties that have passed through the light transmitting part and the frosted part, respectively.

It is a side view of the street light provided with the illuminating device which concerns on embodiment. It is a side view of the illuminating device which concerns on embodiment. It is a top view of the illuminating device which concerns on embodiment. It is a partial horizontal sectional view of the illuminating device which concerns on embodiment. It is a side view which shows the detail of the translucent panel in the illuminating device which concerns on embodiment. It is a model longitudinal cross-sectional view of the illuminating device which concerns on embodiment. It is a figure explaining the effect | action of the street lamp which concerns on embodiment. It is a figure explaining the effect | action of the street lamp which concerns on embodiment. It is a figure explaining the effect | action of the street lamp which concerns on embodiment. It is a side view which shows the other example of the street lamp provided with the illuminating device which concerns on embodiment. It is a side view which shows the other example of the street lamp provided with the illuminating device which concerns on embodiment.

Hereinafter, a street light provided with a lighting device according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the street light 1 is composed of a column 2 extending upward from the ground along a vertical axis O and a lighting device 10 provided at the upper end of the column 2 as a lighting target surface. Illuminate the road surface.
The support column 2 has a tapered shape in which the outer peripheral surface thereof gradually decreases in diameter as it goes upward, and a support portion 3 for fixing and holding the illumination device 10 is provided at the upper end thereof. In addition, a cable (not shown) for supplying electric power to the illumination device 10 is disposed inside the support column 2.

  As shown in FIGS. 2 and 3, the lighting device 10 includes a frame 20, a plurality (six in this embodiment) of light-transmitting panels 30, a cap 40, and a plurality (four in this embodiment). An LED light source 50 is provided. This illuminating device 10 has a substantially eighteen-hedron shape that combines two hexagonal pyramid shapes that are also formed around the vertical axis O at the upper and lower ends of the hexagonal column shape that is formed around the vertical axis O. I am doing.

  The frame 20 is a frame-shaped member that forms a hexagonal pyramid shape and a hexagonal columnar ridgeline in the lower part of the illuminating device 10 having a substantially octahedron shape, and includes six lower frame materials 21 and a hexagonal frame material. 22 and six upper frame members 23.

  The lower frame member 21 is a six bar-shaped member, and its lower end is fixed to the upper surface of the support portion 3 in the support column 2 and is separated from each other toward the upper side, that is, radially extending. Has been placed. The heights of the upper ends of these lower frame members 21 are all the same, and the angles formed by the adjacent lower frame members 21 and 21 are all constant.

  The hexagonal frame material 22 is a frame-like member having a substantially hexagonal shape, and the upper ends of the six lower frame materials 21 are fixed to the lower surfaces of the six corners, respectively. As a result, the hexagonal frame member 22 is arranged in parallel to the horizontal plane.

  The upper frame member 23 is a bar-shaped member in which six pieces are arranged so as to extend vertically upward from the upper surface of the six corners of the hexagonal frame member 22, and the height of these upper frame members 23 is all Identical. Moreover, since it arrange | positions at the corner | angular part of the hexagonal frame material 22, all the space | intervals of the adjacent upper frame materials 23 and 23 are made constant.

  As shown in FIG. 4, the upper frame member 23 includes an inner frame member 23a disposed on the inner side of the lighting device 10 and an outer frame member 23b disposed on the outer side. It is composed of The inner frame member 23a and the outer frame member 23b are bent in accordance with the corners of the hexagonal frame member 22, and are arranged in parallel to each other in a horizontal sectional view.

  The light transmissive panel 30 is a light transmissive panel formed using a synthetic resin such as polycarbonate or a transparent rectangular plate such as glass as a material, and between the adjacent upper frame members 23 and 23 in the frame 20. A total of six are provided. Thereby, a plurality of translucent panels 30 extending in the vertical direction are arranged along the circumferential direction of the vertical axis O, and an internal space S partitioned by these translucent panels 30 is formed. In addition, the lower part of the internal space S is in communication with the outside of the internal space S because the plurality of lower frame members 21 in the frame 20 are arranged at intervals.

  As shown in FIG. 4, the end of the long side of the substantially rectangular plate shape of the translucent panel 30 is sandwiched between the inner frame member 23a and the outer frame member 23b of the upper frame member 23. It is supported. Thereby, the translucent panel 30 is firmly fixed to the frame 20.

  Here, as shown in FIG. 5, the translucent panel 30 has an upper region (for example, an upper third region of the translucent panel 30) on a rectangular plate surface extending in the vertical direction as a frost portion 31. A lower region (for example, a lower third region of the translucent panel 30) is a transparent portion 32, and an intermediate region between the frosted portion 31 and the transparent portion 32 (for example, an intermediate portion in the vertical direction of the translucent panel 30). A gradation area 33 is defined as a third area).

  The frost portion 31 is a frosted glass-like portion formed by applying a milky white film on the surface of the upper region of the transparent rectangular plate that is the material of the translucent panel 30, or by applying a sand surface treatment. The light passing through the frost portion 31 is transmitted while being diffused.

  Whereas the frost portion 31 is a portion formed by processing the translucent panel 30, the transparent portion 32 is a portion that maintains the transparent state without processing the transparent rectangular plate. The light passing through the transparent portion 32 is emitted outward as light that maintains light intensity while suppressing light diffusion and absorption by the translucent panel 30 as much as possible.

  The gradation part 33 is a part formed so as to gradually transition from the frost part 31 to the transparent part 32, and gradually increases the degree of processing applied to the frost part 31 from the frost part 31 side toward the transparent part 32 side. It is formed by applying while weakening.

As shown in FIGS. 2 and 3, the shade portion 40 is a portion forming an upper hexagonal pyramid shape in the illuminating device 10 having an approximately eighteen-face shape, and is provided so as to close the internal space S from above. It has been. The shade portion 40 has a shade shape formed of six triangular plates 41 having hexagonal pyramid-shaped slopes, and one of the six triangular plates 41 has a triangular shape along its outer shape. An opening 41a is formed.
A decorative member 42 is attached to the top of the shade portion 40.

  As the LED light source 50 (light source), for example, a light emitting diode that emits light having high directivity such as white or yellow is employed. In the present embodiment, as shown in FIG. 3, four LED light sources 50 are respectively arranged inside the shade portion 40.

  Of these four LED light sources 50, three LED light sources 50a are three triangular plates 41 arranged alternately, out of the five triangular plates 41 excluding the triangular plate 41 having the opening 41a in the shade portion 40. It is fixed inside each. As shown in FIG. 6, these LED light sources 50a have an irradiation direction set obliquely downward, and more specifically, sandwich the vertical axis O with respect to the triangular plate 41 to which each LED light source 50a is fixed. The irradiation direction is set toward the translucent panel 30 opposed to each other. Thereby, compared with the case where the LED light source 50a irradiates light to the nearest translucent panel 30, the incident light is incident at a shallow angle with respect to the normal direction of the translucent panel 30.

  In addition, one LED light source 50b except for the three LED light sources 50a that emit light obliquely downward among the four LED light sources 50 is fixed inside the triangular plate 41 having the opening 41a in the shade portion 40. As shown in FIG. 6, the irradiation direction is set so that light is irradiated obliquely upward through the opening 41a.

  The power supply to these LED light sources 50 is arranged in the support column 2 and along the lower frame material 21. Further, as shown in FIG. 4, the inner frame material 23a and the outer frame in the upper frame material 23 are arranged. It is carried out via a cable 51 arranged between the material 23b.

Next, an effect | action of the street lamp 1 provided with the illuminating device 10 of this embodiment is demonstrated.
As shown in FIG. 6, the irradiation light having a strong directivity toward the obliquely downward direction emitted from the LED light source 50 a passes through the internal space S and enters the entire upper and lower regions of the translucent panel 30.

  At this time, among the light irradiated obliquely downward from the LED light source 50, the light near the horizontal direction, that is, the light that can be directly incident on the eyes of the pedestrian is frosted in the upper region of the translucent panel 30. It is emitted as diffused light L <b> 1 toward the outside of the internal space S while being diffused by 31.

  On the other hand, of the light emitted obliquely downward from the LED light source 50, the light that is close to the vertically downward direction, that is, the light that contributes to the irradiation of the road surface passes through the transparent portion 32 in the lower region of the translucent panel 30. Therefore, the diffusion and absorption of light by the translucent panel 30 are suppressed as much as possible, and the light is emitted as straight light L2 having high light intensity.

  Therefore, as shown in FIG. 7, since this diffused light L1 whose light intensity has been reduced is incident on the eyes of the pedestrian, it is possible to avoid the pedestrian feeling dazzled. Further, the road surface near the pedestrian's feet can be irradiated with the straight light L2, and the illuminance of the road surface can be secured high to ensure the safety of the pedestrian's feet.

  Further, as light is diffused by the frost portion 31 in the upper region of the translucent panel 30, a light emitting region T having a soft spread is formed around the upper region as shown in FIG. Thereby, since a pedestrian can grasp | ascertain the position of the illuminating device 10 in the street lamp 1 even from a distant place, by arrange | positioning a plurality of such street lamps 1 along a walking path, the gaze guidance with respect to the said pedestrian is carried out. It becomes possible to demonstrate the function.

  As described above, soft diffused light L1 is emitted from the upper region of the translucent panel 30 so as to spread, and clear straight light L2 having high light intensity is emitted from the lower region of the translucent panel 30. Will be. For this reason, lights having different properties are adjacent to each other, and it is possible to obtain irradiation light having a beautiful contrast woven by these lights.

  Furthermore, in this embodiment, since the gradation part 33 is formed between the frost part 31 and the transparent part 32 in the translucent panel 30, the illumination light passing through the gradation part 33 gradually starts from the diffused light L1. Is emitted to the outside of the internal space S as transition light L3 that changes to straight light L2. As a result, the boundary between the diffused light L1 and the straight light L2 becomes ambiguous, and these two lights can be blended naturally without a sense of incongruity, and the aesthetics can be further enhanced.

  Furthermore, since the lower part of the internal space S partitioned by the plurality of translucent panels 30 is in communication with the outside, the light emitted from the LED light source 50 in the downward direction of the internal space S leaks out. So that it is emitted outward. As a result, it can be effectively used as light for irradiating the road surface without blocking the light. Further, it is possible to promote the air flow to the internal space S and suppress the temperature rise by the LED light source 50. Therefore, the lifetime of the LED light source 50 can be further extended, and the illuminating device 10 itself can be reduced in size because heat is not locally accumulated. Further, dust, insects and the like can be prevented from accumulating in the lighting device 10.

  Further, since the upper light L4 can be emitted obliquely upward from the LED light source 50b through the opening 41a, for example, as shown in FIG. Can be achieved. When no light-up is necessary, it is possible to save power by turning off only the LED light source 50b.

The embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, in the embodiment, the street light 1 in which one lighting device 10 is arranged on the upper side of the support column 2 has been described. However, the present invention is not limited to this. For example, as shown in FIG. The support rod 4 extending in the direction may be provided, and the illuminating devices 10 and 10 may be arranged on the support rod 4 via the support portions 3 and 3 arranged at both upper ends of the support rod 4, respectively. .

  Further, as the street light 1, for example, as shown in FIG. 11, a support rod 4 extending in the horizontal direction is provided on the upper portion of the support column 2, and the support portions 3 and 3 are arranged at the lower ends of both ends of the support rod 4. A configuration in which the lighting devices 10 and 10 are arranged so as to be suspended under the support rod 4 may be adopted.

  Furthermore, in the embodiment, a plurality of translucent panels 30 are arranged in the circumferential direction of the vertical axis O, and the space partitioned by the translucent panel 30 is defined as the internal space S. The translucent member forming the translucent panel 30 may be used as the inner space S, and the lighting device 10 may be configured. Further, the translucent panel 30 is arranged not only on the entire circumference in the circumferential direction around the vertical axis O but on a part of the circumferential direction 90 °, 180 °, etc., for example, and the space inside the translucent panel 30 is illuminated as the internal space S. The apparatus 10 may be configured.

  Further, in the embodiment, an example in which a total of four LED light sources 50 are used has been described. However, a configuration in which three or less LED light sources 50 are arranged may be used, or five or more LED light sources 50 are arranged. It may be a configuration.

  In the embodiment, the example in which the LED light source 50 is used as the directional light source has been described. However, the present invention is not limited to this. For example, a high intensity discharge lamp (HID) light source may be used. Even in this case, it is possible to emit directional irradiation light in the same manner as the LED light source 50, and to achieve power saving and long life of the light source.

DESCRIPTION OF SYMBOLS 1 Street light 2 Prop 10 Illuminating device 20 Frame 30 Translucent panel 31 Frost part 32 Transparent part 33 Gradation part 40 Shade part 41a Opening part 50 LED light source 50a LED light source 50b LED light source O Vertical axis S Internal space L1 Diffuse light L2 Straight light L3 transition light L4 upward light

Claims (6)

A lighting device for illuminating the surface to be illuminated from above, a translucent panel extending vertically;
A cap portion for closing the upper side of the internal space partitioned by the translucent panel;
A light source disposed inside the shade portion and emitting illumination light directed obliquely downward through the translucent panel to the outside of the internal space;
The translucent panel has a lower region as a transparent portion that transmits the illumination light, and an upper region as a frost portion that diffuses and transmits the illumination light.   The lighting device according to claim 1, wherein an intermediate region between the transparent portion and the frost portion in the translucent panel is a gradation portion that gradually transitions from the transparent portion to the frost portion. .   The lighting device according to claim 1, wherein the inner space communicates with the outside of the inner space at a lower side thereof. An opening is formed in a part of the cap,
The second light source for emitting illumination light directed obliquely upward to the outside of the shade portion through the opening is provided inside the shade portion. The lighting device according to claim 1.   The lighting device according to any one of claims 1 to 4, wherein the light source is configured by either an LED light source or an HID light source. The lighting device according to any one of claims 1 to 5,
A street lamp characterized by comprising a column extending in the vertical direction and supporting the lighting device at an upper part thereof.

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