JP5736540B2 - lighting equipment - Google Patents

Description

  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.

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, the luminaire 100 described in Patent 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 the casing 101. A tube 102 and a reflecting plate 103 that reflects light from the LED fluorescent tube 102 downward are provided.
The LED fluorescent tube 102 is a substantially circular semi-transparent cover body in which an LED light emitter 106 formed by mounting an LED 105 on a plate-like printed board 104 elongated in the axial direction is partially opened through a heat sink 108. 107 is formed by attaching inside.

  Thereby, the light irradiated from the LED fluorescent tube 102 is diffused widely, and the light is efficiently irradiated downward without decreasing the illuminance.

Utility Model Registration No. 3163621 (FIG. 1)

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 the luminaire 110 that illuminates a desired range using the LED 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 the LED unit 111 to restrict the irradiation range. doing. The optical axis CB of the LED unit 111 is directed vertically downward as the irradiation direction, and the reflectors 112 and 113 are provided symmetrically with respect to the optical axis CB.
Thereby, the light emitted in the lateral direction is reflected by the reflectors 112 and 113, and the light is efficiently irradiated in a desired direction (downward).

  However, when the LED unit 111 is used as the light source as in the lighting fixture 110 described above, the lateral spread is less than that when a fluorescent lamp is used, and the reflectors 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.

  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.

The lighting fixture of the present invention is a box shape that is directly or indirectly attached to a mounting surface through a predetermined member and has an open bottom, and the cross-sectional shape along the width direction orthogonal to the longitudinal direction is a U shape. The U-shaped shape includes a top plate, a first side plate extending downwardly connected to one end portion of the top plate, and a lower side connected to the other end portion of the top plate. And the length is set to be shorter than the first side plate, so that the lower end portion is constituted by a second side plate located above the lower end portion of the first side plate, and In an internal space, between the first side plate and the second side plate, the second side plate is provided so as to be inclined with respect to the top plate, and the inclination is provided from the first side plate to the second side plate. An instrument body provided with a mounting plate that is inclined obliquely upward toward
A plurality of LED chips disposed along the longitudinal direction of the substrate at a central position in the width direction perpendicular to the longitudinal direction of the substrate on the lower surface of the substrate ; A reflection unit that is arranged and accommodated so as to surround the periphery of the LED unit in a space located below the mounting plate in the internal space of the instrument body, and that opens downward includes a plate, a respective optical axes of the plurality of LED chips, corresponding to the inclination of the attachment plate is inclined a predetermined angle with respect to a vertical line, the reflecting plate, one of said substrate From the vicinity of the end portion to the lower end portion of the first side plate of the instrument main body, the first reflecting plate portion that is a portion inclined obliquely downward, and the inner surface is a reflecting surface that reflects light, and Near the other end of the board And the second reflecting plate portion whose inner surface is a reflecting surface that reflects light, to the lower end portion of the second side plate of the instrument body, and a portion inclined obliquely downward, The length of the first reflecting plate portion is longer than the length of the second reflecting plate portion .

Further, the lighting fixture of the present invention, among the light from the LED unit, out of the angle formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the first reflector portion, The light having the smallest value is defined as the first light shielding angle, and the light ray emitted from the LED unit obliquely downward in contact with the lower end of the second reflecting plate portion is formed by the horizontal line. When the smallest value among the angles is used as the second light shielding angle, the first light shielding angle θ1 is:
θ1 ≧ tan−1 ((h0−h1) / d1),
h0: installation height of the lighting fixture,
h1: the height of the viewpoint of the person located in the lower space on the first reflector portion side ,
d1: horizontal distance between the viewpoint and lighting equipment,
It is what is.

Further, the lighting fixture of the present invention, among the light from the LED unit, out of the angle formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the first reflector portion, The light having the smallest value is defined as the first light shielding angle, and the light ray emitted from the LED unit obliquely downward in contact with the lower end of the second reflecting plate portion is formed by the horizontal line. In the case where the angle having the smallest value is set as the second light shielding angle, the second light shielding angle is smaller than the first light shielding angle.

Furthermore, in the lighting fixture of the present invention, the second light shielding angle θ2 is
θ2 ≦ tan−1 ((h0−h2) / d2),
h0: installation height of the lighting fixture,
h2: the height of the upper end of the illumination object, such as an advertisement, disposed on the wall surface on the second reflector portion side ,
d2: horizontal distance between the lighting fixture and the lighting object ,
It is what is.

  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) 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 Sectional view at II-II position in FIG. Explanatory drawing which shows the cross-sectional block diagram of a station which is a model of this invention application, cross-sectional dimension, and required illumination intensity 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 Explanatory drawing which shows the light-shielding angle of a counter optical axis side reflecting plate Explanatory drawing which shows the light-shielding angle of an optical axis side reflecting plate Cross section of conventional spotlight Sectional view when LED is used as light source of conventional lighting fixture

Hereinafter, the lighting fixture of embodiment which concerns on this invention is demonstrated using drawing.
As shown in FIG. 1 and FIG. 2, the lighting apparatus 10 according to the embodiment of the present invention is attached to a ceiling surface 11 such as a platform 13 of a station (see FIG. 3), and the platform 13, the track 14, and the platform 13. It can be used to illuminate the wall surface 12 on the rear side (opposite the track 14).

The lighting fixture 10 has, for example, a long fixture body 20 along the home 13 and is directly attached to the ceiling surface 11 or attached to the ceiling surface 11 via a raceway 21 that is an electric path for power supply and distribution. .
The instrument main body 20 has a rectangular box shape with an opening (opening 21) at the bottom, and a top plate 22 is attached to the ceiling surface 11 or the like with bolts and nuts 23. A power supply device 34 is attached to the lower surface of the top plate 22 and is housed inside the instrument body 20.

The instrument main body 20 includes a side plate 24 on the wall surface 12 side and a line side plate 25 facing the side plate 24. A mounting plate 26 is attached to be inclined between the side plates 24 and 25, and an LED unit (LED) 30 is attached to the mounting plate 26.
Corresponding to the inclination of the mounting plate 26, the side plate 25 on the track side is longer and lower than the side plate 24 on the wall surface side.

  A plurality of (for example, eight) LED units 30 are provided along the longitudinal direction of the instrument body 20. Each LED unit 30 has a plurality of (for example, six) LED chips 32 mounted on a rectangular plate-shaped substrate 31. A panel 33 containing a diffusing material is provided in front of the LED chip 32.

  The LED unit 30 is attached to the lower surface of the attachment plate 26. For this reason, the optical axis L1 of the LED unit 30 is a direction orthogonal to the mounting plate 26, and is inclined toward the side 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 counter optical axis side or the line side.

  A reflection plate 35 that blocks light and reflects light in the direction of the optical axis L1 is attached to the lower side of the mounting plate 26 inside the instrument body 20. The reflecting plate 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-optical axis reflecting plate 352 that reflects light toward the wall surface.

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 the platform 13, Er ≧ 20 (lx) at the track 14, and Ev ≧ 100 (lx) at the wall 12 behind the platform 13. ) Is set. The dimensions in each part are as shown in FIG.

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 the wall surface 12 increases, but the horizontal illuminance of the home 13 and the track 14 tends to decrease. Further, the angle θ satisfying the necessary illuminance of each part described above is 15 ° where the vertical illuminance of the wall surface 12 exceeds 100 (lx). At this time, the required illuminance at the home 13 and the track 14 is also satisfied.

As shown in FIG. 5, the light blocking angle θ1 by the anti-optical axis 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 the track 14 and the lighting 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 the side plate 25 on the line side is set so that the light shielding angle θ1 of the counter optical axis side reflecting plate 352 is 40 ° or more.

As shown in FIG. 6, the light blocking angle θ2 by the optical axis side reflecting plate 351 is smaller than the light blocking angle θ1 (see FIG. 5) of the counter optical axis side 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 the side plate 24 on the wall surface side is set so that the light blocking angle θ2 of the optical axis side reflection plate 352 is 10 ° or less.

As described above, since the lighting fixture 10 according to the present invention described above tilts the optical axis L1 of the LED unit 30, the vertical surface illuminance of the wall surface 12 on the side tilted with the optical axis L1 is higher than the vertical direction. It becomes easy to see the advertisement 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 the wall surface 12, making it easier to see the advertisement 121, the timetable, and the like.
Further, since the light is shielded by the reflecting plate 35, glare to a person on the opposite side of the optical axis L1 from the vertical direction can be suppressed.

  Further, since the light shielding angle θ1 of the counter-optical axis side reflecting plate 352 is made larger than the necessary minimum light shielding angle at which the LED unit 30 cannot be directly seen from the positional relationship between the lighting 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 axis side reflection plate 352 on the track 14 side to 40 ° or more, glare for the train driver can be reliably suppressed.

  In addition, since the optical axis side reflecting plate 351 on the side inclined with respect to the optical axis L1 from the vertical direction is provided, the light leaking to the ceiling surface 11 is reflected downward by the optical axis side 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.

  Further, the light shielding angle θ2 of the optical axis side reflecting plate 351 is made smaller than the maximum value of the light shielding angle for preventing the light from the LED unit 30 from being blocked due to the positional relationship between the lighting fixture 10 and the advertisement 121, etc. The home 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 axis side reflection plate 351 on the wall surface 12 side to 10 ° or less, the home 13 can be efficiently illuminated without impairing the visibility of the advertisement 121 and the timetable. it can.

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 the platform 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 Lighting equipment 32 LED chip (LED)
351 Optical axis side 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)

It is attached to the surface to be attached directly or indirectly through a predetermined member, and has a box shape with an opening at the bottom, and a cross-sectional shape along the width direction perpendicular to the longitudinal direction is a U-shape. The shape is a top plate, a first side plate connected to one end of the top plate and extending downward, and connected to the other end of the top plate and extending downward, and has a length of By being set shorter than the first side plate, the lower end portion is constituted by a second side plate located above the lower end portion of the first side plate, and in the internal space, An inclination is provided between the first side plate and the second side plate with respect to the top plate, and the inclination is inclined obliquely upward from the first side plate toward the second side plate. An instrument body with a mounting plate to be
A plurality of LED chips disposed along the longitudinal direction of the substrate at a central position in the width direction perpendicular to the longitudinal direction of the substrate on the lower surface of the substrate ; An LED unit comprising:
In the space located below the mounting plate in the internal space of the instrument body, the reflector plate is disposed and accommodated so as to surround the periphery of the LED unit, and opens downward.
Have
Wherein the plurality of LED chips each optical axis, corresponding to the inclination of the mounting plate is inclined a predetermined angle with respect to a vertical line,
The reflector is
A first reflection whose inner surface is a reflection surface that reflects light, which is a portion inclined obliquely downward from one end portion of the substrate to a lower end portion of the first side plate of the instrument body. A plate part,
A second reflection whose inner surface is a reflective surface that reflects light, which is a portion inclined obliquely downward from the vicinity of the other end of the substrate to the lower end of the second side plate of the instrument body. A plate part,
Have
The length of the said 1st reflecting plate part is a lighting fixture longer than the length of the said 2nd reflecting plate part . The lighting fixture according to claim 1,
Of the light from the LED unit, the smallest value among the angles formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the first reflecting plate portion is the first. The light shielding angle that has the smallest value among the angles formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the second reflecting plate portion of the light from the LED unit Is the second shading angle,
The first light shielding angle θ1 is
θ1 ≧ tan−1 ((h0−h1) / d1),
h0: installation height of the lighting fixture,
h1: the height of the viewpoint of the person located in the lower space on the first reflector portion side ,
d1: horizontal distance between the viewpoint and lighting equipment,
Is a lighting fixture. The lighting fixture according to claim 1 or 2,
Of the light from the LED unit, the smallest value among the angles formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the first reflecting plate portion is the first. The light shielding angle that has the smallest value among the angles formed by the horizontal line and the light beam emitted obliquely downward in contact with the lower end of the second reflecting plate portion of the light from the LED unit Is a second light shielding angle, the second light shielding angle is smaller than the first light shielding angle. The lighting fixture according to claim 3,
The second light shielding angle θ2 is
θ2 ≦ tan−1 ((h0−h2) / d2),
h0: installation height of the lighting fixture,
h2: the height of the upper end of the illumination object, such as an advertisement, disposed on the wall surface on the second reflector portion side ,
d2: horizontal distance between the lighting fixture and the lighting object ,
Is a lighting fixture.

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