JP2012069357A - Lighting system for condominium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system for a condominium for lighting from a ceiling to a common hallway by a lighting fixture, which can attain a feeling of brightness by improving an unobstructed view of the common hallway.SOLUTION: The lighting system can irradiate light on a common space 10 from the lighting fixture 1 arranged on a common ceiling 12. The common space 10 consists of a common hallway 11 for a condominium, the common ceiling 12, a common wall 13 for connecting the ceiling 12 and the hallway 11, and a front entrance 14 built into a part of the common wall 13. With the common wall 13, an average illumination at a ceiling side range 13a closer to the common ceiling 12 than an ascending door frame of the front entrance 14 is to be higher than that at a hallway side range 13b closer to the common hallway 11 than the ascending door frame. Therefore, the unobstructed view of the common hallway can be improved since the ceiling side range 13a forming a uniform wall surface with the common wall 13 and being higher than the eyes of a person M is illuminated brighter than the hallway side range 13b wherein contrast between the common wall 13 and the front entrance 14 is repeated and luminance unevenness is apt to be visible, and the feeling of brightness for the common hallway can be easily attained.

Description

  The present invention relates to an illumination system for an apartment house that illuminates a shared corridor in a common space such as an ordinary apartment house with a lighting device arranged on a ceiling.

  As this type of lighting system, there is known a lighting system that illuminates by installing a lighting fixture on a ceiling in front of the entrance of each dwelling unit along a common hallway (see Patent Document 1). A configuration example of this type of illumination system is shown in FIG. In this lighting system, the lighting fixture 100 is installed on the ceiling 105 in front of the entrance 104 for dwelling units discretely arranged along the common wall 103 standing on the common corridor 102 in the common space 101. Illuminate towards 102. The luminaire 100 is irradiated using a light source such as an incandescent bulb, and the light distribution pattern 106 spreads from the luminaire 100 side toward the common corridor 102 when the common wall 103 side is viewed in front, and the entrance 104 is It has a bell shape that irradiates in the center.

JP 2005-235634 A

  In this type of lighting system, when the shared corridor 102 is illuminated, the contrast between the entrance 104 and the shared wall 103 that are discretely arranged on the shared wall 103 is repeated, and brightness unevenness occurs downward from the upper end of the entrance 104. Easy to see. For this reason, when the common hallway 102 is viewed in the longitudinal direction, the view of the common hallway 102 is not good. Further, since illumination is performed around the entrance 104, the common wall 103 is higher than the human eye and the illuminance of the ceiling side region above the entrance 104 is lower than the illuminance of the corridor side region near the common corridor 102 below. For this reason, it is difficult to obtain a feeling of brightness.

  The present invention has been made to solve the above problems, and in a lighting system for an apartment house that illuminates the common hallway of the apartment house with a lighting device arranged on the common ceiling, the prospect of the common hallway is good and bright. An object of the present invention is to provide an illumination system that is easy to obtain a sense of comfort.

In order to achieve the above object, a lighting system according to the present invention includes a shared hallway for an apartment house, a shared ceiling facing the shared hallway, and a shared wall disposed at a position connecting the shared ceiling and the shared hallway. A lighting system for a collective housing that irradiates a common space constituted by a dwelling entrance built in a part of the common wall with a lighting device arranged on a common ceiling,
The common wall includes a ceiling side region closer to the common ceiling than the upper ceiling of the entrance for the dwelling unit, and a corridor side region closer to the shared corridor than the upper foot of the dwelling unit entrance, and the average in the ceiling side region The illuminance is larger than the average illuminance in the hallway area.

  In this apartment building lighting system, it is preferable that an average illuminance at a door knob of the entrance for the dwelling unit is larger than an average illuminance in an area below the door knob in the hallway area.

  In this apartment building lighting system, it is preferable to irradiate light in two opposite directions along the longitudinal direction of the common hallway.

  In this apartment building lighting system, the common space has a common handrail erected on the common corridor facing the common wall, and is surrounded by an opening edge of the common ceiling and an upper edge of the common handrail. It is preferable to have a light-shielding part that shields direct light from the luminaire toward the outer region.

  According to the lighting system for an apartment building of the present invention, compared to the corridor side area where the contrast of light and darkness by the common wall and the entrance for the dwelling unit is repeated and the luminance unevenness is easy to see, it is a homogeneous wall surface that is higher than human eyes and only the common wall. The ceiling side area is illuminated brightly. Therefore, uneven brightness is difficult to see, and more light enters the line of sight, so that the common corridor has better visibility and a sense of brightness can be easily obtained.

The block diagram of the lighting system for apartment houses concerning the 1st Embodiment of this invention. The perspective view of the lighting fixture of a lighting system same as the above. (A) is a common wall illuminance distribution map by the lighting fixture of the same lighting system, (b) is a shared wall illuminance distribution map by the lighting fixture of the conventional lighting system. The figure which shows the light distribution in the common space along the longitudinal direction of the common hallway by the lighting fixture of a lighting system same as the above. The figure which shows the light distribution in the common space along the transversal direction of the common hallway by the lighting fixture of a lighting system same as the above. The block diagram of the modification of the said embodiment. (A) is the structure and light distribution figure seen from the transversal direction of the shared corridor of the lighting system for apartment houses concerning the 2nd Embodiment of this invention, (b) is a perspective view of the lighting fixture of a lighting system same as the above. (A) is a figure which shows the arrangement | positioning relationship between the common wall illumination distribution by the lighting fixture of a lighting system same as the above, and the entrance for dwelling units, (b) is the arrangement of the common wall illumination distribution by the lighting fixture of the conventional lighting system and the entrance for dwelling units. The figure which shows a relationship. The block diagram of the modification of the said embodiment. The structure and light distribution figure seen from the longitudinal direction of the common corridor of the lighting system for apartment houses concerning the 3rd Embodiment of this invention, (b) is a perspective view of the lighting fixture of the lighting system. The light distribution curve figure in the surface parallel to the common wall by the lighting fixture of the illumination system same as the above and perpendicular to the common hallway. (A) is a floor surface illuminance distribution map on the common hallway by the lighting system same as the above, (b) is a floor surface illuminance distribution map on the common hallway by the lighting fixture of the conventional lighting system. The block diagram of the modification of the said embodiment. The block diagram of the lighting system for apartment houses which concerns on the 4th Embodiment of this invention. (A) is a figure which shows the light-shielding by the side of a short direction of a common corridor by the light-shielding plate of an illumination system same as the above, (b) is a perspective view of the lighting fixture of the illumination system. The block diagram of the modification of the said embodiment. The figure which shows the light distribution in the common space along a common hallway longitudinal direction by the conventional illumination system.

  An apartment building lighting system according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the present lighting system includes a luminaire 1 that illuminates a common space 10 for an apartment house. The common space 10 includes a common hallway 11, a common ceiling 12 that faces the common hallway 11, a common wall 13, and a dwelling entrance 14. The common wall 13 is disposed at a position connecting the common ceiling 12 and the common hallway 11, and the entrance 14 has a door knob 15 and is incorporated in a part of the common wall 13.

  The common wall 13 includes a ceiling side region 13 a closer to the common ceiling 12 than the upper base of the entrance 14 and a corridor side region 13 b closer to the common corridor 11 than the upper base of the entrance 14. The illumination system of the present embodiment illuminates so that the average illuminance in the ceiling side region 13a is larger than the average illuminance in the hallway side region 13b. Here, the longitudinal direction of the shared corridor 11 is the X direction, the short direction is the Y direction, and the person M proceeds in the X direction along the shared corridor 11.

  FIG. 2 shows the configuration of the luminaire 1. The lighting fixture 1 has a fixture main body 2 made of a rectangular housing and a light source 3 attached to the fixture main body 2. The light source 3 has, for example, a shape in which a plurality of micro light sources such as LEDs are arranged, and the optical axis 4 faces the ceiling side region 13 a side of the common wall 13 in a state where the lighting fixture 1 is installed on the common ceiling 102. It is fixed to the instrument body 2 as described above. The light source 3 is not limited to the LED, and may be another light source. There is no restriction on the arrangement as long as the ceiling side region 13a can be irradiated. Further, the instrument body 2 may have a shape other than a rectangle as long as the light source 3 is attached in the irradiation direction.

  FIG. 3A shows a shared wall illuminance distribution 16 a on the shared wall 13 due to the light emitted from the lighting fixture 1. FIG.3 (b) shows the common wall illumination distribution 16b by the conventional illumination system (refer FIG. 17) for the comparison. The shared wall illuminance distributions 16a and 16b are obtained by calculation under the same conditions of the width of the shared space 10, the reflectance of the shared space 10, and the lamp luminous flux. Here, for example, the common space 10 has a frontage of 14.4 m, a depth of 1.5 m, and a ceiling height of 2.7 m, and the reflectance of each surface of the common hallway 11, the common ceiling 12, and the common wall 13 is 10%. , 50%, and 30%, and the lamp luminous flux is 2210 (lm). The light distribution of the luminaire 1 is calculated using, for example, the light distribution BZ classification (British Zonal Classification) established by the British Lighting Society, and the light distribution by a plurality of micro light sources with the optical axis in the irradiation direction. As a whole, the desired lighting fixture light distribution is obtained.

  The common wall illuminance distribution 16a of the present lighting system has a wide distribution of high illuminance levels in the ceiling side region 13a as compared with the common wall illuminance distribution 16b of the conventional lighting system, and the irradiation light from the lighting fixture 1 is radiated from the ceiling side region 13a. The light distribution is more concentrated on the side.

  Table 1 below shows the average illuminance, the minimum illuminance, the maximum illuminance, and the ratio of the minimum illuminance and the average illuminance calculated for the ceiling-side region 13a and the corridor-side region 13b in the present illumination system and the conventional illumination system. (G1) and the ratio (G2) between the minimum illuminance and the maximum illuminance are shown. The unit of each of these illuminances is indicated by looks (lx). As shown in Table 1, the ratio of the average illuminance in the ceiling side area 13a and the corridor side area 13b between the present lighting system and the conventional lighting system is about 4 (112 / 28.5) and about 3.6 (40 .5 / 11.3). That is, in this illumination system, the ceiling side area 13a is irradiated more brightly than the corridor side area 13b as compared with the conventional illumination system.

  4 shows a schematic light distribution pattern 17a when the longitudinal direction of the shared corridor 11 is viewed in the shared space 10 in the present lighting system, and FIG. 5 shows an arrangement when the shorter direction of the shared corridor 11 is viewed. The light pattern 17b is shown. These light distribution patterns 17a and 17b indicate that the black and white shades of black are brighter and the whiter are darker, and that the average illuminance of the ceiling side region 13a is brighter than the average illuminance of the corridor side region 13b. Indicates that

  According to the lighting system of the present embodiment, the ceiling-side region 13a, which is a homogeneous wall surface of only the shared wall 13, is brighter than the corridor-side region 13b in which contrast between the entrance 14 and the shared wall 13 is repeated and uneven brightness is easily visible. Irradiated. Therefore, when the ceiling side area 13a is bright, the luminance unevenness generated in the corridor side area 13b is difficult to see, the line of sight is improved, and the position higher than the line of sight of the person M becomes bright, and it becomes easy to obtain a feeling of brightness. .

  Moreover, since the ceiling side area | region 13a is illuminated, when entering / exiting the entrance 14, the glare by illumination can be prevented. Moreover, by using LED for the light source 3, the lighting fixture 1 can be reduced in size and energy can be saved, and when the lighting fixture 1 is attached to the common ceiling 12, there is no overhead pressure feeling, Easy to see.

  FIG. 6 shows a modification of the above embodiment. In this modification, the light source 3 of the luminaire 1 is made one. The luminaire 1 includes a reflector 5 that is fixed to the fixture body 2 and reflects light from the light source 3. The reflector 5 is fixed to the lighting fixture 1 so as to irradiate the ceiling side region 13a. The shape of the reflecting plate 5 is not limited as long as it can irradiate light from the light source 3 in the direction of the ceiling side region 13a.

  According to this modification, by reducing the number of light sources, the initial and running costs are reduced, and the replacement work is reduced because only one lamp is replaced. In addition, there is no light color mismatch among the plurality of light sources, and the light from the light source 3 is collected by the reflector 5 and irradiated in the direction of the ceiling side region 13a. The problem of instability caused by tilting and fixing is reduced.

  Next, a lighting system for an apartment house according to a second embodiment of the present invention will be described with reference to FIGS. In the illumination system of this embodiment, the average illuminance in the area of the door knob 15 of the entrance 14 is larger than the average illuminance in the area below the door knob 15 in the hallway side area 13b.

  As shown in FIG. 7 (a), the luminaire 1 of the present illumination system further includes a plurality of light sources 3b that irradiate the door knob 15 of the entrance 14 in addition to the light source 3a that irradiates the ceiling side region 13a. The area is illuminated brighter than the area below it.

  As shown in FIG. 7B, the light source 3b is disposed along with the light source 3a on the side surface of the instrument body 2 facing the ceiling side region 13a, and the optical axis 4 of the light source 3b is directed toward the door knob 15 of the entrance 14. Is set. When the lighting fixture 1 is installed on the common ceiling 12, the optical axis 4 is inclined and fixed to the fixture body 2 so that the light source 3b irradiates the door knob 15, and the average illuminance of the door knob region is an area below the door knob region. Illuminate so that it is greater than the average illuminance. The light source 3b is formed of the same light source as the light source 3.

  Fig.8 (a) shows the irradiation state in the common wall illuminance distribution 16c by this illumination system, and the doorknob area | region of the entrance 14 by this shared wall illuminance distribution 16c, and the area | region below (each shown with a broken-line frame). FIG. 8B shows, for comparison, a common wall illuminance distribution 16b of a conventional lighting system (see FIG. 17), and an irradiation state in the doorknob region and the area below the common wall illuminance distribution 16b. As shown in FIGS. 8 (a) and 8 (b), in the present lighting system, the doorknob area has a higher illumination level and is illuminated brighter than the area below it in the conventional lighting system. .

  Table 2 below shows the average illuminance, the minimum illuminance, the maximum illuminance, and the ratio of the minimum illuminance to the average illuminance calculated for the doorknob area and the area below it in this illumination system and the conventional illumination system (G1). ) And the ratio (G2) between the minimum illuminance and the maximum illuminance. As shown in Table 2, the ratio of the average illuminance between the doorknob area and the area below it in the present lighting system and the conventional lighting system is about 1.7 (34.5 / 20.3) and about 1 respectively. .4 (15.8 / 11.0). That is, this illumination system can irradiate the area of the doorknob brighter than the area below that of the conventional illumination system.

  According to the present embodiment, the average illuminance in the door knob area of the entrance 14 becomes brighter than the average illuminance in the area below that, so it is easy to find the keyhole of the entrance door.

  FIG. 9 shows a modification of the above embodiment. This modification includes the light source 3 of the luminaire 1 and includes a reflection plate 5 that reflects light from the light source 3 in at least two directions. The reflection plate 5 has a reflection surface that reflects light from the light source 3 in the direction of the ceiling-side region 13 a and a reflection surface that reflects light in the direction of the door knob 15 of the entrance 14. Thereby, both the ceiling side area | region 13a and a doorknob area | region can be irradiated with the light from one light source 3 with the one reflecting plate 5, and a structure becomes simple. The shape of the reflecting plate 5 is not limited as long as it can irradiate the light from the light source 3 in the direction of the ceiling side region 13a and the direction of the door knob 15.

  Next, a lighting system for an apartment house according to a third embodiment of the present invention will be described with reference to FIGS. 10 to 12. In the illumination system of this embodiment, in the above-described embodiment, the luminaire 1 irradiates light in two opposite directions along the longitudinal direction of the common hallway 11.

  As shown in FIGS. 10 (a) and 10 (b), in the present lighting system, the luminaire 1 in the above embodiment has a light source c that irradiates two opposite directions along the longitudinal direction of the shared corridor 11, respectively. Further prepare. The light source 3c is composed of the same light source as the light sources 3a and 3b, and is fixed to both side surfaces of the appliance main body 2 which are opposed to each other along the longitudinal direction of the common hallway 11. The light source 3 c is arranged so that the optical axis 4 forms a certain inclination in the shared hallway 11 along the longitudinal direction of the shared hallway 11. Here, the light distribution pattern 17 a has a shape in which the irradiation light is expanded in the longitudinal direction of the common hallway 11.

  FIG. 11 shows a light distribution curve 20a in a plane perpendicular to the common corridor 11 along the longitudinal direction of the common corridor 11 and a common corridor along the short direction of the common corridor 11 calculated based on the irradiation characteristics of the lighting fixture 1. 11 shows a pie chart with the light distribution curve 20b in a plane perpendicular to FIG. The light distribution curve 20 a is a curve connecting the irradiation levels calculated along the circumference around the lighting fixture 1 in a plane parallel to the common wall 13, and the light distribution curve 20 b is perpendicular to the longitudinal direction of the common corridor 11. It consists of a curve connecting the irradiation levels calculated along the circumference centered on the luminaire 1 within a simple plane.

  The light distribution curve 20a changes symmetrically from the angle 0 ° of the pie chart to the left and right rotation angle directions, and is almost the maximum irradiation level in the vicinity of plus or minus 45 ° in two directions along the longitudinal direction of the common corridor 11. It has become. Thereby, the lighting fixture 1 comes to irradiate widely toward the longitudinal direction of the shared corridor 11 from directly below. Moreover, the lighting fixture 1 can irradiate toward the entrance 14 side of the common wall 13 with the light distribution curve 20b, for example.

  FIG. 12A shows a floor illumination distribution 21a of the common corridor 11 illuminated by the lighting fixture 1 of the present illumination system, and FIG. 12B shows a floor illumination distribution by a conventional illumination system for comparison. 21b is shown, and the illuminance distribution by two luminaires arranged at point P, respectively. In addition, P point shows the position of the center point of each lighting fixture in the common ceiling 12. In the present illumination system, the illuminance of the floor illuminance distribution 21a is distributed in the range of 15 (lx) to 25 (lx), whereas the illuminance of the conventional floor illuminance distribution 21b is about 10 (lx). To 70 (lx). Moreover, the present illumination system has a lower degree of illuminance reduction with respect to the central region of the luminaire 1 at the boundary region between the two luminaires 1 apart from the conventional illumination system. Therefore, the floor illumination distribution 21a of the present illumination system is leveled compared to the conventional floor illumination distribution 21b.

  Table 3 below shows the average illuminance, the minimum illuminance, the maximum illuminance, and the ratio of the minimum illuminance to the average illuminance calculated for the entire floor surface of the common corridor 11 corresponding to the illumination by the present illumination system and the conventional illumination system (G1). ) And the ratio (G2) between the minimum illuminance and the maximum illuminance. As shown in Table 3, in the present illumination system, the ratio between the minimum illuminance and the average illuminance (G1 = 0.560) and the ratio between the minimum illuminance and the maximum illuminance (G2 = 0.432) The system is larger than G1 = 0.157 and G2 = 0.059, respectively. Therefore, this illumination system makes the average illuminance, the minimum illuminance, and the maximum illuminance values close to each other and level the floor illuminance distribution as compared with the conventional illumination system.

  According to this lighting system, the floor illuminance distribution 21a is leveled compared to the conventional floor illuminance distribution 21b, and the difference between the minimum illuminance and the maximum illuminance is small over the entire floor surface, as compared with the conventional lighting system. The uniformity of lighting in the common corridor 11 is improved. Therefore, it is possible to reduce unevenness in brightness caused by the darkness between the luminaires 1 arranged apart from each other.

  FIG. 13 shows a modification of the above embodiment. This modification has a single light source 3 of the luminaire 1 and further includes a plurality of reflectors 5 a that reflect light from the light source 3 in opposite directions along the longitudinal direction of the shared hallway 11. The reflection plates 5a are fixed to both ends in the longitudinal direction of the shared corridor 11 in the appliance body 2, and reflect the light from the light source 3 in opposite directions. According to this modification, since the lighting fixture 1 can irradiate the light from one light source 3 in the opposite direction along the longitudinal direction of the common corridor 11 by the reflector 5a, the illumination of the common corridor 11 can be performed with a simple configuration. The uniformity of is improved.

  Next, a lighting system for an apartment house according to a fourth embodiment of the present invention will be described with reference to FIGS. 14 and 15. In the lighting system of the present embodiment, as shown in FIG. 14, the shared space 10 has a shared handrail 22 erected on the shared corridor 11 so as to face the shared wall 13, and the luminaire 1 toward the outer region. A light-shielding plate (light-shielding part) 6 that shields direct light from the light. The light shielding plate 6 shields direct light from the luminaire 1 traveling to the outer region surrounded by the opening edge of the common ceiling 12 and the upper edge of the common handrail 22.

  The shared handrail 22 has a shared handrail wall that is erected on the shared corridor 11 so as to face the shared wall 13 in parallel, and the upper edge of the shared handrail wall in the height direction is a handrail. The opening edge of the common ceiling 12 includes a peripheral edge of the opening of the common space 10 from the upper edge of the common handrail 22 to the common ceiling 12, and the common space viewed from the opening surrounded by the opening edge and the upper edge of the common handrail 22. The outer side of 10 is an outer region. The light shielding plate 6 is attached to the luminaire 1 so as to shield direct light from the luminaire 1 toward the outer region. The light shielding plate 6 may be attached to the common ceiling 12 side.

  As shown in FIG. 15A, the light shielding plate 6 is mounted on the side surface of the instrument body 2 on the shared handrail 22 side so as to face the shared wall 13. The light shielding plate 6 blocks direct light from the luminaire 1 emitted to the outer region through a triangular area (shown by hatching) formed by the luminaire 1, the common ceiling 12, and the common handrail 22. . In addition, the light-shielding plate 6 should just be a thing which can light-shield the direct light which goes out from the shared space 10 to an outer area | region. As shown in FIG. 15 (b), the lighting fixture 1 has a common ceiling 12 so that the optical axes 4 of the plurality of light sources 3 (3a, 3b, 3c) provided in the fixture body 2 are not directed to the outer region. The light source 3 is not provided on the side surface of the instrument body 2 on the shared handrail 22 side.

  According to this illumination system, leakage light from the shared space 10 to the outer region outside the irradiation target range can be suppressed, and light damage due to leakage light can be reduced. Moreover, energy loss can be suppressed by eliminating illumination in unnecessary directions.

  FIG. 16 shows a modification of the above embodiment. This modification has one light source 3 of the luminaire 1 and includes a light shielding plate 6 on the back surface side of the reflection plate 5 that reflects light from the light source 3 to the shared wall 13 side. The light shielding plate 6 is fixed to the reflecting plate 5 or the luminaire 1 so as to shield direct light directed to the outer region of the light emitted from the light source 3. This modification can block direct light toward the outer region, and the number of light sources 3 is reduced, so that the configuration is simplified.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, in each of the above embodiments, the case where the entrance for the dwelling unit exists on one side along the common hallway is shown, but when the entrance for the dwelling unit exists on both sides of the common hallway, the ceiling of the common wall on both sides from the lighting device What is necessary is just to illuminate each toward the side area and the door knob of the entrance for dwelling units. Moreover, in order to assist the directivity of the irradiation light from a lighting fixture, you may provide optical members, such as a concave lens, a convex lens, or a reflective mirror, for example in the front, back, or side of the output surface of a light source.

1 Lighting fixture 6 Light shielding plate (light shielding part)
DESCRIPTION OF SYMBOLS 10 Common space 11 Shared corridor 12 Shared ceiling 12a Open edge 13 Common wall 13a Ceiling side area 13b Corridor side area 14 Residential entrance 14a Upper wall 15 Door knob 22 Shared handrail 22a Upper edge

Claims (4)

A common hall for an apartment, a common ceiling facing the common hall, a common wall arranged to connect the common ceiling and the common hall, and a dwelling entrance built in a part of the common wall A lighting system for an apartment house that illuminates a common space constituted by lighting fixtures arranged on a common ceiling,
The common wall includes a ceiling side region closer to the common ceiling than the upper ceiling of the entrance for the dwelling unit, and a corridor side region closer to the shared corridor than the upper foot of the dwelling unit entrance, and the average in the ceiling side region An illumination system for an apartment house, characterized in that the illuminance is greater than the average illuminance in the hallway area.   The lighting system for an apartment house according to claim 1, wherein an average illuminance at a door knob of the entrance for the dwelling unit is larger than an average illuminance in an area below the door knob in the hallway area.   The lighting system for an apartment house according to claim 1 or 2, wherein the lighting fixture irradiates light in two opposite directions along the longitudinal direction of the common hallway. The shared space has a shared handrail erected in the shared hallway facing the shared wall,
3. The housing for an apartment house according to claim 2, further comprising: a light-shielding portion that shields direct light from a lighting device toward an outer region surrounded by an opening edge of the common ceiling and an upper edge of the common handrail. Lighting system.