JP2012104345A - Lighting fixture - Google Patents

Abstract

Translated fromJapanese

【課題】壁面に取り付けられた広告等が見やすく、かつ壁面と反対側にいる人へのグレアを抑えた照明器具を提供する。
【解決手段】ＬＥＤ３２の光軸Ｌ１を傾けているので、光軸Ｌ１を傾けた側の壁面１２の鉛直面照度が高くなり、壁面１２に掲げられた広告１２１等が見えやすくなる。また、反射板３５によって遮光されるので、光軸Ｌ１と反対側にいる人へのグレアを抑えることができる。
【選択図】図２Provided is a lighting fixture that can easily see an advertisement or the like attached to a wall surface and suppresses glare to a person on the opposite side of the wall surface.
Since the optical axis L1 of the LED 32 is inclined, the vertical surface illuminance of the wall surface 12 on the side where the optical axis L1 is inclined is increased, and an advertisement 121 and the like placed on the wall surface 12 can be easily seen. Further, since the light is shielded by the reflecting plate 35, glare to a person on the side opposite to the optical axis L1 can be suppressed.
[Selection] Figure 2

Description

Translated fromJapanese

本発明は、駅のホーム等の上方に設けて、ホームおよび壁面に光を照射する照明器具に関するものである。  The present invention relates to a lighting fixture that is provided above a platform of a station and irradiates light on the platform and a wall surface.

従来より、天井面等に取り付けて主に下方を照明するために、細長い照明器具が用いられている（例えば、特許文献１参照）。
図７に示すように、特許文献１に記載の照明器具１００では、軸方向に細長く下方に開口した矩形箱状の筐体１０１を有し、筐体１０１の内部に、軸方向に長いＬＥＤ蛍光管１０２と、このＬＥＤ蛍光管１０２の光を下方へ反射する反射板１０３を有する。
ＬＥＤ蛍光管１０２は、軸方向に細長い板状のプリント基板１０４にＬＥＤ１０５を実装して形成されたＬＥＤ発光体１０６を、放熱板１０８を介して一部開口した略円管状の半透明のカバー体１０７内部に取り付けて形成される。2. Description of the Related Art Conventionally, a long and narrow lighting fixture has been used to attach to a ceiling surface or the like and mainly illuminate a lower part (see, for example, Patent Document 1).
As shown in FIG. 7, theluminaire 100 described inPatent Document 1 has a rectangular box-shaped casing 101 that is elongated in the axial direction and opens downward, and the LED fluorescence is long in the axial direction inside thecasing 101. Atube 102 and areflecting plate 103 that reflects light from the LEDfluorescent tube 102 downward are provided.
The LEDfluorescent tube 102 is a substantially circular semi-transparent cover body in which anLED light emitter 106 formed by mounting anLED 105 on a plate-like printedboard 104 elongated in the axial direction is partially opened through aheat sink 108. 107 is formed by attaching inside.

これにより、ＬＥＤ蛍光管１０２から照射される光を、広く拡散させて、照度を落とすことなく効率的に下方へ照射する。  Thereby, the light irradiated from the LEDfluorescent tube 102 is diffused widely, and the light is efficiently irradiated downward without decreasing the illuminance.

実用新案登録第３１６３６２１号公報（第１図）Utility Model Registration No. 3163621 (FIG. 1)

ところで、照明器具を設置する場所に対応して、光の照射範囲を限定したい場合がある。
図８に示すように、光源にＬＥＤユニット１１１を用いて所望の範囲を照明する照明器具１１０においては、ＬＥＤユニット１１１の照射方向前方の左右両側に反射板１１２，１１３を設けて照射範囲を規制している。ＬＥＤユニット１１１の光軸ＣＢは、照射方向である鉛直下方に向けられており、反射板１１２，１１３は光軸ＣＢに対して対称に設けられている。
これにより、横方向に発せられる光を反射板１１２，１１３により反射して、所望の方向（下方）へ効率よく光を照射している。By the way, there is a case where it is desired to limit the light irradiation range corresponding to the place where the lighting fixture is installed.
As shown in FIG. 8, in theluminaire 110 that illuminates a desired range using theLED unit 111 as a light source,reflectors 112 and 113 are provided on both the left and right sides in front of the irradiation direction of theLED unit 111 to restrict the irradiation range. is doing. The optical axis CB of theLED unit 111 is directed vertically downward as the irradiation direction, and thereflectors 112 and 113 are provided symmetrically with respect to the optical axis CB.
Thereby, the light emitted in the lateral direction is reflected by thereflectors 112 and 113, and the light is efficiently irradiated in a desired direction (downward).

しかしながら、前述した照明器具１１０のように、光源にＬＥＤユニット１１１を用いる場合には、蛍光灯を用いる場合に比して、もともと横方向への広がりが少ない上に、反射板１１２，１１３によって横方向の光がさらに遮光されてしまうので、例えば駅のホーム等の照明においては、ホーム後方の壁面における垂直面照度が不足して、時刻表や広告等が見えにくくなるという問題があった。  However, when theLED unit 111 is used as the light source as in thelighting fixture 110 described above, the lateral spread is less than that when a fluorescent lamp is used, and thereflectors 112 and 113 are used for the horizontal direction. Since the light in the direction is further shielded, for example, in the illumination of a station platform or the like, there is a problem that the vertical surface illuminance on the wall surface behind the platform is insufficient, making it difficult to see timetables and advertisements.

本発明は、従来の問題を解決するためになされたもので、壁面に取り付けられた広告等が見やすく、かつ壁面と反対側にいる人へのグレアを抑えた照明器具を提供することを目的とする。  The present invention has been made to solve the conventional problems, and it is an object of the present invention to provide a lighting apparatus that is easy to see advertisements and the like attached to a wall surface and that suppresses glare to a person on the opposite side of the wall surface. To do.

本発明の照明器具は、光軸が鉛直下方より所定角度傾いて配されるＬＥＤと、前記ＬＥＤの光軸が傾いている側とは反対側の側方に設けられ、前記ＬＥＤからの光を遮断し、かつ、前記ＬＥＤの光軸側に光を反射する反光軸側反射板と、を有するものである。  The lighting fixture of the present invention is provided on the side opposite to the side where the optical axis of the LED is inclined and the LED where the optical axis is inclined at a predetermined angle from below vertically, and the light from the LED is transmitted. And an anti-optical axis side reflecting plate that blocks light and reflects light toward the optical axis side of the LED.

また、本発明の照明器具は、前記反光軸側反射板の遮光角θ１が、
θ１≧ｔａｎ^−１（（ｈ０−ｈ１）／ｄ１）、
ｈ０：照明器具の設置高さ、
ｈ１：視点の高さ、
ｄ１：照明器具と視点の水平距離、
であるものである。In the lighting fixture of the present invention, the light-shielding angle θ1 of the anti-optical axis side reflector is
θ1 ≧ tan⁻¹ ((h0−h1) / d1),
h0: installation height of the lighting fixture,
h1: Height of viewpoint,
d1: Horizontal distance between the lighting fixture and the viewpoint,
It is what is.

また、本発明の照明器具は、前記ＬＥＤの光軸側の側方に光軸側反射板を備え、その遮光角が前記反光軸側反射板の遮光角よりも小さいものである。  Moreover, the lighting fixture of this invention equips the side by the side of the optical axis of said LED with the optical-axis side reflecting plate, The light-blocking angle is a thing smaller than the light-blocking angle of the said anti-optical-axis side reflecting plate.

さらに、本発明の照明器具は、前記光軸側反射板の遮光角θ２が、
θ２≦ｔａｎ^−１（（ｈ０−ｈ２）／ｄ２）、
ｈ０：照明器具の設置高さ、
ｈ２：広告等の上端の高さ、
ｄ２：照明器具と広告等の水平距離、
であるものである。Furthermore, in the lighting fixture of the present invention, the light shielding angle θ2 of the optical axis side reflector is
θ2 ≦ tan⁻¹ ((h0−h2) / d2),
h0: installation height of the lighting fixture,
h2: the height of the top edge of the advertisement, etc.
d2: Horizontal distance between lighting fixtures and advertisements,
It is what is.

本発明は、ＬＥＤの光軸を傾けているので、光軸を傾けた側の壁面の鉛直面照度が高くなり、壁面に掲げられた広告等が見えやすくなる。また、光軸と反対側に反射板を設けたので、反射板によって遮光され、光軸と反対側にいる人へのグレアを抑えることができるという効果を有する照明器具を提供できる。  In the present invention, since the optical axis of the LED is inclined, the vertical surface illuminance on the wall surface on which the optical axis is inclined is increased, and advertisements and the like placed on the wall surface can be easily seen. Further, since the reflecting plate is provided on the side opposite to the optical axis, it is possible to provide a lighting apparatus that has an effect of being shielded by the reflecting plate and suppressing glare to a person on the side opposite to the optical axis.

（Ａ）は本発明に係る実施形態の照明器具の平面図であり、（Ｂ）は側面図であり、（Ｃ）は下方から見た底面図(A) is a top view of the lighting fixture of embodiment which concerns on this invention, (B) is a side view, (C) is the bottom view seen from the downward direction図１中ＩＩ−ＩＩ位置の断面図Sectional view at II-II position in FIG.本発明適用のモデルである駅の断面構成図、断面寸法および必要照度を示す説明図Explanatory drawing which shows the cross-sectional block diagram of a station which is a model of this invention application, cross-sectional dimensions, and required illumination光軸の角度を５°刻みで３０°まで変化させた場合における駅の各部の計算照度を示す表Table showing the calculated illuminance of each part of the station when the angle of the optical axis is changed to 30 ° in 5 ° increments反光軸側反射板の遮光角を示す説明図Explanatory drawing which shows the light-shielding angle of a counter-optical-axis side reflecting plate光軸側反射板の遮光角を示す説明図Explanatory drawing which shows the light-shielding angle of an optical axis side reflecting plate従来のスポットライトの断面図Cross section of conventional spotlight従来の照明器具の光源にＬＥＤを用いた場合の断面図Sectional view when LED is used as light source of conventional lighting fixture

以下、本発明に係る実施形態の照明器具について、図面を用いて説明する。
図１および図２に示すように、本発明に係る実施形態の照明器具１０は、駅（図３参照）のホーム１３等の天井面１１にとりつけられて、ホーム１３や、線路１４やホーム１３後方（線路１４と反対側）の壁面１２を照明するのに用いることができる。Hereinafter, the lighting fixture of embodiment which concerns on this invention is demonstrated using drawing.
As shown in FIG. 1 and FIG. 2, thelighting apparatus 10 according to the embodiment of the present invention is attached to aceiling surface 11 such as aplatform 13 of a station (see FIG. 3), and theplatform 13, thetrack 14, and theplatform 13. It can be used to illuminate thewall surface 12 on the rear side (opposite the track 14).

照明器具１０は、例えばホーム１３に沿って長い器具本体２０を有しており、直接天井面１１に取り付けられたり、給配電のための電路であるレースウェイ２１を介して天井面１１に取り付けられる。
器具本体２０は、下方が開口（開口部２１）した矩形箱状を呈しており、天板２２がボルト・ナット２３により天井面１１等に取り付けられる。天板２２の下面には電源装置３４が取り付けられており、器具本体２０の内部に収容される。Thelighting fixture 10 has, for example, along fixture body 20 along thehome 13 and is directly attached to theceiling surface 11 or attached to theceiling surface 11 via araceway 21 that is an electric path for power supply and distribution. .
The instrumentmain body 20 has a rectangular box shape with an opening (opening 21) at the bottom, and atop plate 22 is attached to theceiling surface 11 or the like with bolts andnuts 23. Apower supply device 34 is attached to the lower surface of thetop plate 22 and is housed inside theinstrument body 20.

器具本体２０は、壁面１２側の側板２４と、側板２４に対向する線路側の側板２５を有する。両側板２４，２５間には取付板２６が傾斜して取り付けられており、取付板２６にはＬＥＤユニット（ＬＥＤ）３０が取り付けられている。
取付板２６の傾斜に対応して、壁面側の側板２４よりも、線路側の側板２５の方が長く下方まで設けられている。The instrumentmain body 20 includes aside plate 24 on thewall surface 12 side and aline side plate 25 facing theside plate 24. Amounting plate 26 is attached to be inclined between theside plates 24 and 25, and an LED unit (LED) 30 is attached to themounting plate 26.
Corresponding to the inclination of themounting plate 26, theside plate 25 on the track side is longer and lower than theside plate 24 on the wall surface side.

ＬＥＤユニット３０は、器具本体２０の長手方向に沿って複数個（ここでは、例えば８個）設けられている。各ＬＥＤユニット３０は、矩形板状の基板３１の上に複数個（ここでは、例えば６個）のＬＥＤチップ３２が取り付けられている。また、ＬＥＤチップ３２の前方には拡散材入りのパネル３３が設けられている。  A plurality of (for example, eight)LED units 30 are provided along the longitudinal direction of theinstrument body 20. EachLED unit 30 has a plurality of (for example, six)LED chips 32 mounted on a rectangular plate-shaped substrate 31. Apanel 33 containing a diffusing material is provided in front of theLED chip 32.

ＬＥＤユニット３０は取付板２６の下面に取り付けられている。このため、ＬＥＤユニット３０の光軸Ｌ１は、取付板２６に直交する方向であり、壁面側の側板２４側に傾いている。以後、鉛直方向に対して光軸Ｌ１がある側を光軸側または壁面側といい、光軸Ｌ１が無い側を反光軸側または線路側という。  TheLED unit 30 is attached to the lower surface of theattachment plate 26. For this reason, the optical axis L1 of theLED unit 30 is a direction orthogonal to themounting plate 26, and is inclined toward theside plate 24 on the wall surface side. Hereinafter, the side with the optical axis L1 with respect to the vertical direction is referred to as the optical axis side or the wall surface side, and the side without the optical axis L1 is referred to as the anti-optical axis side or the line side.

器具本体２０内部における取付板２６の下側には、光を遮断するとともに、光を光軸Ｌ１方向へ反射する反射板３５が取り付けられている。反射板３５は、鉛直方向に対して光軸Ｌ１がある側に設けられて光を線路側に反射する光軸側反射板３５１と、鉛直方向に対して光軸Ｌ１が無い側に設けられて光を壁面側に反射する反光軸側反射板３５２とを有する。  Areflection plate 35 that blocks light and reflects light in the direction of the optical axis L1 is attached to the lower side of themounting plate 26 inside theinstrument body 20. The reflectingplate 35 is provided on the side where the optical axis L1 is present with respect to the vertical direction, and is provided on the side where the optical axis L1 is not present with respect to the vertical direction. And an anti-opticalaxis reflecting plate 352 that reflects light toward the wall surface.

図３は、本発明適用のモデルである駅の断面構成図である。
図３に示すように、駅における各部の必要照度は、ホーム１３では、Ｅｈ≧２００（ｌｘ）、線路１４では、Ｅｒ≧２０（ｌｘ）、ホーム１３後方の壁面１２では、Ｅｖ≧１００（ｌｘ）に設定されている。また、各部における寸法は、図３に示す通りである。FIG. 3 is a sectional configuration diagram of a station which is a model to which the present invention is applied.
As shown in FIG. 3, the required illuminance of each part in the station is Eh ≧ 200 (lx) at theplatform 13, Er ≧ 20 (lx) at thetrack 14, and Ev ≧ 100 (lx) at thewall 12 behind the platform 13. ) Is set. The dimensions in each part are as shown in FIG.

図４には、光軸Ｌ１の角度θ（図２参照）を５°刻みで３０°まで変化させた場合の、各部の計算照度を示してある。
図４に示すように、光軸Ｌ１の角度θを大きくするほど、壁面１２の鉛直面照度が大きくなるが、ホーム１３および線路１４の水平面照度が小さくなる傾向が見られる。また、上述した各部位の必要照度を満足する角度θは、壁面１２の鉛直照度が１００（ｌｘ）を超える１５°となる。このとき、ホーム１３および線路１４における必要照度をも満足する。FIG. 4 shows the calculated illuminance of each part when the angle θ (see FIG. 2) of the optical axis L1 is changed to 30 ° in increments of 5 °.
As shown in FIG. 4, as the angle θ of the optical axis L <b> 1 is increased, the vertical illuminance of thewall surface 12 increases, but the horizontal illuminance of thehome 13 and thetrack 14 tends to decrease. Further, the angle θ satisfying the necessary illuminance of each part described above is 15 ° where the vertical illuminance of thewall surface 12 exceeds 100 (lx). At this time, the required illuminance at thehome 13 and thetrack 14 is also satisfied.

図５に示すように、上述したモデルの駅における反光軸側反射板３５２による遮光角θ１は、線路１４を走る電車の運転士の視点と照明器具１０との位置関係から、
θ１≧ｔａｎ^−１（（ｈ０−ｈ１）／ｄ１）、
ｈ０：照明器具の設置高さ、
ｈ１：視点の高さ、
ｄ１：照明器具と視点の水平距離、
各変数に図５に示す数値を代入すると、
θ１≧ｔａｎ（（２．９−１．４）／１．８）
≧４０°
より、反光軸側反射板３５２の遮光角θ１が４０°以上になるように、線路側の側板２５の高さを設定する。As shown in FIG. 5, the light blocking angle θ1 by the anti-opticalaxis side reflector 352 in the model station described above is based on the positional relationship between the viewpoint of the driver of the train running on thetrack 14 and thelighting fixture 10.
θ1 ≧ tan⁻¹ ((h0−h1) / d1),
h0: installation height of the lighting fixture,
h1: Height of viewpoint,
d1: Horizontal distance between the lighting fixture and the viewpoint,
Substituting the values shown in Fig. 5 for each variable,
θ1 ≧ tan ((2.9−1.4) /1.8)
≧ 40 °
Accordingly, the height of theside plate 25 on the line side is set so that the light shielding angle θ1 of the counter optical axisside reflecting plate 352 is 40 ° or more.

図６に示すように、光軸側反射板３５１による遮光角θ２は、反光軸側反射板３５２の遮光角θ１（図５参照）よりも小さいものであり、
θ２≦ｔａｎ^−１（（ｈ０−ｈ２）／ｄ２）、
ｈ０：照明器具の設置高さ、
ｈ２：広告等の上端の高さ、
ｄ２：照明器具と広告等の水平距離、
各変数に図６に示す数値を代入すると、
θ２≦ｔａｎ（（２．９−２．４）／３）
≦１０°
より、光軸側反射板３５２の遮光角θ２が１０°以下になるように、壁面側の側板２４の高さを設定する。As shown in FIG. 6, the light blocking angle θ2 by the optical axisside reflecting plate 351 is smaller than the light blocking angle θ1 (see FIG. 5) of the counter optical axisside reflecting plate 352,
θ2 ≦ tan⁻¹ ((h0−h2) / d2),
h0: installation height of the lighting fixture,
h2: the height of the top edge of the advertisement, etc.
d2: Horizontal distance between lighting fixtures and advertisements,
Substituting the values shown in Fig. 6 for each variable,
θ2 ≦ tan ((2.9-2.4) / 3)
≦ 10 °
Thus, the height of theside plate 24 on the wall surface side is set so that the light blocking angle θ2 of the optical axisside reflection plate 352 is 10 ° or less.

以上、説明した本発明に係る照明器具１０は、ＬＥＤユニット３０の光軸Ｌ１を傾けているので、鉛直方向よりも光軸Ｌ１を傾けた側の壁面１２の鉛直面照度が高くなり、壁面１２に掲げられた広告１２１等が見やすくなる。すなわち、光軸Ｌ１を１５°傾けることにより、壁面１２の鉛直面照度として１００（ｌｘ）が確保できるので、広告１２１や時刻表等が見やすくなる。
また、反射板３５によって遮光されるので、鉛直方向よりも光軸Ｌ１と反対側にいる人へのグレアを抑えることができる。As described above, since thelighting fixture 10 according to the present invention described above tilts the optical axis L1 of theLED unit 30, the vertical surface illuminance of thewall surface 12 on the side tilted with the optical axis L1 is higher than the vertical direction. It becomes easy to see theadvertisement 121 and the like listed in the above. That is, by tilting the optical axis L1 by 15 °, 100 (lx) can be secured as the vertical illuminance of thewall surface 12, making it easier to see theadvertisement 121, the timetable, and the like.
Further, since the light is shielded by the reflectingplate 35, glare to a person on the opposite side of the optical axis L1 from the vertical direction can be suppressed.

また、反光軸側反射板３５２の遮光角θ１を、照明器具１０と視点の位置関係から、ＬＥＤユニット３０が直接見えなくなる必要最小限の遮光角よりも大きくするので、より確実にグレアを抑えることができる。すなわち、線路１４側の反光軸側反射板３５２の遮光角θ１を４０°以上に設定したことにより、電車の運転士に対するグレアを確実に抑えることができる。  Further, since the light shielding angle θ1 of the counter-optical axisside reflecting plate 352 is made larger than the minimum necessary light shielding angle at which theLED unit 30 cannot be directly seen from the positional relationship between thelighting fixture 10 and the viewpoint, glare can be suppressed more reliably. Can do. That is, by setting the light-shielding angle θ1 of the anti-optical axisside reflection plate 352 on thetrack 14 side to 40 ° or more, glare for the train driver can be reliably suppressed.

また、鉛直方向よりも光軸Ｌ１を傾けた側の光軸側反射板３５１を設けたので、天井面１１に漏れる光を光軸側反射板３５１で下方向に反射することにより、効率よくホーム１３を照明することができる。また、青色ＬＥＤと黄色蛍光体を組み合わせた白色ＬＥＤを用いた場合に、特有の横方向へ出る黄色の光のスジが、天井面等に現れることを防ぐことができる。  In addition, since the optical axisside reflecting plate 351 on the side inclined with respect to the optical axis L1 from the vertical direction is provided, the light leaking to theceiling surface 11 is reflected downward by the optical axisside reflecting plate 351 so that the home can be efficiently used. 13 can be illuminated. Further, when a white LED in which a blue LED and a yellow phosphor are combined is used, it is possible to prevent a yellow light streak that appears in a specific lateral direction from appearing on a ceiling surface or the like.

さらに、光軸側反射板３５１の遮光角θ２を、照明器具１０と広告１２１等の位置関係から、ＬＥＤユニット３０からの光が遮られないための遮光角の最大値よりも小さくするので、広告１２１等の見えやすさを損なわずに、効率よくホーム１３を照明することができる。すなわち、壁面１２側の光軸側反射板３５１の遮光角θ２を、１０°以下に設定したことにより、広告１２１や時刻表等の見やすさを損なわずに、効率よくホーム１３を照明することができる。  Further, the light shielding angle θ2 of the optical axisside reflecting plate 351 is made smaller than the maximum value of the light shielding angle for preventing the light from theLED unit 30 from being blocked due to the positional relationship between thelighting fixture 10 and theadvertisement 121, etc. Thehome 13 can be efficiently illuminated without impairing the visibility of 121 or the like. That is, by setting the light blocking angle θ2 of the optical axisside reflection plate 351 on thewall surface 12 side to 10 ° or less, thehome 13 can be efficiently illuminated without impairing the visibility of theadvertisement 121 and the timetable. it can.

なお、本発明の照明器具は、前述した実施形態に限定されるものでなく、適宜な変形，改良等が可能である。
例えば、前述した実施形態においては、駅のホーム１３に取り付ける照明器具を例示したが、この他、マンションの開放廊下等、一方に視対象となる壁面があり、他方が解放されているような空間に広く適用可能である。In addition, the lighting fixture of this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, in the above-described embodiment, the lighting apparatus attached to theplatform 13 of the station is illustrated, but in addition to this, there is a space such as an open corridor of a condominium that has a wall surface to be viewed on one side and the other is open. Widely applicable to.

１０ 照明器具
３２ ＬＥＤチップ（ＬＥＤ）
３５１ 光軸側反射板
３５２ 反光軸側反射板
Ｌ１ 光軸
θ１ 反光軸側反射板の遮光角
θ２ 光軸側反射板の遮光角10Lighting equipment 32 LED chip (LED)
351 Optical axisside reflecting plate 352 Counter optical axis side reflecting plate L1 Optical axis θ1 Light blocking angle of counter optical axis side reflecting plate θ2 Light blocking angle of optical axis side reflecting plate

Claims (4)

Translated fromJapanese

光軸が鉛直下方より所定角度傾いて配されるＬＥＤと、
前記ＬＥＤの光軸が傾いている側とは反対側の側方に設けられ、前記ＬＥＤからの光を遮断し、かつ、前記ＬＥＤの光軸側に光を反射する反光軸側反射板と、を有する照明器具。LEDs whose optical axis is inclined at a predetermined angle from vertically below;
An anti-optical axis side reflector that is provided on a side opposite to the side where the optical axis of the LED is inclined, blocks light from the LED, and reflects light toward the optical axis of the LED; A lighting fixture having. 請求項１に記載の照明器具において、
前記反光軸側反射板の遮光角θ１が、
θ１≧ｔａｎ^−１（（ｈ０−ｈ１）／ｄ１）、
ｈ０：照明器具の設置高さ、
ｈ１：視点の高さ、
ｄ１：照明器具と視点の水平距離、
である照明器具。The lighting fixture according to claim 1,
The light blocking angle θ1 of the counter-optical axis side reflector is
θ1 ≧ tan⁻¹ ((h0−h1) / d1),
h0: installation height of the lighting fixture,
h1: Height of viewpoint,
d1: Horizontal distance between the lighting fixture and the viewpoint,
Is a lighting fixture. 請求項１または請求項２に記載の照明器具において、
前記ＬＥＤの光軸側の側方に光軸側反射板を備え、その遮光角が前記反光軸側反射板の遮光角よりも小さい照明器具。The lighting fixture according to claim 1 or 2,
An illumination fixture comprising an optical axis side reflector on a side of the LED on the optical axis side and having a light shielding angle smaller than that of the counter optical axis side reflector. 請求項３に記載の照明器具において、
前記光軸側反射板の遮光角θ２が、
θ２≦ｔａｎ^−１（（ｈ０−ｈ２）／ｄ２）、
ｈ０：照明器具の設置高さ、
ｈ２：広告等の上端の高さ、
ｄ２：照明器具と広告等の水平距離、
である照明器具。The lighting fixture according to claim 3,
The light blocking angle θ2 of the optical axis side reflecting plate is
θ2 ≦ tan⁻¹ ((h0−h2) / d2),
h0: installation height of the lighting fixture,
h2: the height of the top edge of the advertisement, etc.
d2: Horizontal distance between lighting fixtures and advertisements,
Is a lighting fixture.

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