JP2017117668A - Shield plate and street light using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield plate which shields light from a luminaire, may be attached or detached to a column, and reduces influence of wind, in particular wind from a lateral direction, and to provide a street light including the shield plate.SOLUTION: A shield plate shields light from a luminaire and includes: a fixing part which enables fixture to a column and a shield part connected with the fixing part. A recessed part is formed in a direction toward the fixing part at a side of outer edges forming the shield part which is opposite to a side with which the fixing part is connected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shielding plate that can be attached to a lamp such as a street lamp, and a lamp provided with the shielding plate.

Conventionally, incandescent lamps and mercury lamps have been used as light sources for street lamps, but in recent years, LED light sources with low power consumption and long life have come to be used. With regard to such a street light, for example, the street light described in Patent Document 1 is an LED that illuminates a wide area around the pole with an annular light source supported by the pole and a central light source disposed at the center of the annular light source. This is a street lamp that makes it possible to obtain a desired illuminance and light distribution using a light source.

  However, in the field of street lamps, there are areas that should be illuminated (for example, roads) and areas that should not be illuminated (for example, private land, farmland, rivers, etc. located on the back side of lighting devices) and should be illuminated. There is a need for street lights that illuminate areas and not areas that should not.

  In order to solve such a problem, Patent Document 2 provides a street light that can efficiently irradiate an area that needs illumination and that has less leakage light and can prevent nearby light pollution. It is a street light provided with a substantially box-shaped reflection unit having a reflection surface for reflecting light emitted from the light source unit toward the road surface through the opening. As a result, it is possible to reduce the upper luminous flux and leaked light that extend outside the illumination required area, prevent light pollution in the vicinity, and save power.

  However, in the street lamp according to Patent Document 2, since the reflection unit is manufactured integrally with the street lamp from the beginning, there is a problem that once the street lamp is installed, the reflection unit cannot be easily attached and detached. there were. That is, there is a problem in that the light distribution cannot be controlled when the area to be illuminated and the area that should not be illuminated change after the street lamp is installed. Moreover, since the reflection unit used for the street light which concerns on patent document 2 is a substantially box shape, it is easy to receive especially the influence of the wind from a horizontal direction. Therefore, when a strong wind such as a typhoon is used, there is a fear that the substantially box-shaped reflection unit receives the wind and collapses the street light.

JP 2013-58397 A JP2015-38826A

Therefore, the present invention provides a shielding plate that shields light from the lighting device and can be attached to and detached from the support column, and can reduce the influence of wind especially from the lateral direction, and a street light provided with the shielding plate.

  According to one aspect of the present invention, there is provided a shielding plate that shields light from a lighting device, the securing portion including a fixing portion that can be fixed to a support column, and a shielding portion that is coupled to the fixing portion. A concave portion is formed in a direction toward the fixed portion on the side facing the side to which the fixed portion is connected among the outer edges that form the shape.

  ADVANTAGE OF THE INVENTION According to this invention, the light which shields the light from an illuminating device, can be attached or detached to a support | pillar, and reduced especially the influence of the wind from a horizontal direction, and a streetlight provided with the shielding plate can be provided.

It is the schematic of the street light which concerns on embodiment of this invention. It is a figure which shows the illumination part of the street lamp which concerns on embodiment of this invention. It is a figure which shows the shielding board which concerns on embodiment of this invention. It is a figure which shows the installation angle with respect to the support | pillar of the shielding board which concerns on embodiment of this invention. It is sectional drawing in the AA of FIG.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of thicknesses of the respective regions are different from actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

  FIG. 1 is a schematic view of a street light provided with a shielding plate according to an embodiment of the present invention. The street lamp 1 includes a lighting device 10 attached to the upper part of the support column 2 and a shielding plate 20 attached to the support column 2 below the lighting device 10. The shielding plate 20 shields light from the lighting device 10. In FIG. 1, the direction of light emitted from the illumination device 1 is indicated by an arrow. The area on the right side of the column 2 is an area where light is desired to be illuminated. On the other hand, the region on the left side of the column 2 (shaded portion in FIG. 1) is a region where light is not desired to be illuminated. In this way, by arranging the shielding plate 20 in an area where light is not desired to be illuminated, the light emitted from the lighting device 10 can be shielded, and the street lamp 1 can illuminate only the area desired to be illuminated.

FIG. 2 shows details of the lighting device 10. A plurality of illumination units 10a to 10h are formed in an annular shape in a clockwise direction, and LEDs 11 are arranged in each illumination unit 10a to 10h so as to emit light downward (on the ground side). In this way, by forming the illumination device 10 in a ring shape by the plurality of illumination units 10a to 10h, it is possible to illuminate the light from the LED 11 toward the ground side toward the entire circumference centered on the support column 2.

FIG. 3 shows details of the shielding plate 20. The shielding plate 20 includes a shielding part 21, a horizontal part 26 connected to the shielding part 21, and a substantially C-shaped fixing part 22 connected to the horizontal part 26. A semicircular cutout is formed at the center of the edge of the horizontal portion 26, and the hole 23 is formed by combining the cutout portion and the substantially C shape of the fixed portion 22. The shielding plate 20 is fixed to the support 2 by passing the support 2 through the hole 23. The fixing portion 22 and the horizontal portion 26 can be removed by screws, and the shielding plate 20 can be easily attached to and removed from the support column 2. In addition, the horizontal part 26 should just be provided as needed, and the fixing | fixed part 22 and the shielding part 21 can also be directly connected without having the horizontal part 26. FIG. In that case, the hole 23 may be formed by providing a notch portion in the shielding portion 21 and combining the notch portion and the substantially C shape of the fixing portion 22.

The shielding part 21 has a curved shape with an M-shaped outer edge. That is, when viewed in a plan view, the concave portion 24 and the convex portion 25 are formed on the outer edges of the fixed portion 22 that face each other. As shown in FIG. 3, when the center line of the shielding plate 20 is a BB line, the shape of the recess 24 is symmetrical so that the most recessed portion is on the BB line.

Further, an extension line of the edge of the horizontal portion 26 connected to the fixing portion 22 is defined as a CC line, and a line obtained by moving the CC line in the vertical direction until reaching the convex portion 25 of the shielding portion 21 is represented by DD. If it is taken as a line, the recessed part 24 is arrange | positioned so that it may dent from the DD line side to the CC line side. That is, in FIG. 3, it can be seen that the distance E from the CC line to the outer edge of the shielding part 21 in the vertical direction is smaller in the distance E in the concave part 24 than in the distance F in the convex part 25. The recessed part 24 has the most recessed part on the center line BB line of the shielding board 20, and is formed so that it may spread gradually toward right and left. When viewed in a plan view, the shielding plate 20 is formed so that its area gradually increases from the center line BB to the left and right.

FIG. 4 shows the inclination θ with respect to the horizontal line when the shielding plate 20 is attached to the column 2. The inclination θ has an inclination of 10 ° to 30 ° in the direction toward the illumination device 10 with respect to the horizontal line. By setting the inclination θ to 10 ° or more, light leakage from the illumination device 10 can be suppressed and light can be effectively shielded. On the other hand, if the inclination θ is set to be larger than 30 ° and the shielding plate 20 is tilted in the vertical direction with respect to the horizontal line, it becomes easy to be affected by the crosswind, and there is a high risk that the street light will collapse. turn into. Therefore, the inclination θ is preferably in the range of 10 ° to 30 ° in the direction toward the illumination device 10 with respect to the horizontal line.

FIG. 5 is a cross-sectional view of the street lamp 1 as seen from the ground side along the line AA in FIG. The shielding plate 20 is attached so as to cover most of the upper half of the annular illumination device 10 (illumination units 10a, 10b, 10g, and 10h). By attaching the shielding plate 20 in this way, light emitted from the illumination units 10a, 10b, 10g, and 10h can be shielded. The mounting position of the shielding plate 20 can be adjusted by the fixing portion 22. In FIG. 5, the shielding plate 20 is arranged so as to shield the light emitted from the illumination units 10 a, 10 b, 10 g, and 10 h, but by rotating the shielding plate 20 clockwise around the support column 2, For example, the light emitted from the illumination units 10c, 10d, 10e, and 10f can be blocked. For this reason, even if a street light that illuminates the entire area around the column 2 has already been installed and an area where light is not desired is generated later, the shielding plate 20 can be retrofitted. By attaching, a light shielding area can be created.

Further, the shielding plate 20 has a recess 24 formed on the outer edge facing the fixed portion 22. This is because the support 2 is disposed on the fixing portion 22, and therefore, the light on the back side of the support 2 out of the light emitted from the lighting fixture 10 is blocked by the support 2. That is, in FIG. 5, a part of the light emitted from the illumination units 10 c, 10 d, 10 e, and 10 f to the shielding plate 20 side is blocked by the column 2. Considering the light blocked by the support column 2, the shielding plate 20 is formed so as not to become larger than necessary. For example, the concave portion 24 may not be formed in the shielding plate 20 and may be rectangular, but the area of the shielding plate 20 becomes larger than necessary. As a result, the weight of the shielding plate 20 increases, making it difficult to attach the shielding plate 20 or increasing the area, thereby increasing the cost of the shielding plate 20. The shielding plate 20 according to the present invention can effectively shield a part of light from a light source with a minimum area in a street lamp that emits light in all directions around a column.

Further, when the surface of the shielding unit 21 facing the illumination device 10 is a mirror surface, the light in the region that should not be illuminated can be shielded and the light can be efficiently reflected toward the region that should be illuminated.

As described above, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 ... street light,
2 ... posts
10 ... lighting device,
10a to 10h ... lighting unit,
11 ... LED,
20 ... shielding plate,
21 ... shielding part,
22 ... fixed part,
23 ... hole,
24 .. recess,
25 ... convex part,
26 ... Horizontal part

Claims (7)

A shielding plate for shielding light from the lighting device,
A fixing part that enables fixing to the column;
A shielding part connected to the fixing part,
The shielding board characterized by the recessed part being formed in the direction which faces the said fixing | fixed part in the side facing the side which the said fixing | fixed part connects among the outer edges which form the said shielding part. The shielding plate according to claim 1,
2. The shielding plate according to claim 1, wherein the outer edge is M-shaped so as to have a region whose area gradually increases from the center toward both sides in plan view. The shielding plate according to claim 1, wherein the fixing portion is coupled to the shielding plate so as to face the most recessed portion of the recess. The horizontal part connected so that the said shielding part may have an inclination-angle of 10 degrees-30 degrees with respect to a horizontal direction between the said fixing | fixed part and the said shielding part was further provided. 4. The shielding plate according to any one of 3 above. The lighting device is attached to the upper side of the column,
The street light provided with the shielding board of any one of Claims 1 thru | or 4 under the said illuminating device. The lighting device is attached to the upper side of the column,
The shielding plate according to any one of claims 1 to 3, wherein the shielding plate is fixed to the column so that an inclination of 10 ° to 30 ° is formed in the direction of the lighting device with respect to a horizontal direction. Street light. The street light according to claim 5 or 6, wherein the lighting device is formed in an annular shape centering on the support column.

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