JP4358021B2 - Tunnel lighting system and tunnel lighting fixture - Google Patents

Description

  The present invention relates to a tunnel lighting system and a tunnel lighting fixture used therefor.

  The conventional tunnel illumination system 1 is configured as shown in FIGS. 11 to 13, for example. FIG. 11 is a schematic cross-sectional view showing the tunnel illumination system 1. FIG. 12 is a schematic longitudinal sectional view showing a part of the tunnel illumination system 1. FIG. 13 is a schematic longitudinal sectional view showing more parts of the tunnel illumination system 1.

  In this conventional tunnel illumination system 1, as shown in FIGS. 11 to 13, in the vicinity of the center of the ceiling of the tunnel 2, along the lane direction (perpendicular to the plane of FIG. 11, left and right in FIGS. 12 and 13), etc. It is comprised from the several lighting fixture 3 installed in the space | interval.

  Each luminaire 3 includes a light source unit (not shown) such as a low-pressure sodium lamp provided therein, and a reflection member (not shown) that reflects light from the light source unit to have a predetermined light distribution characteristic. And is composed of.

  Here, the predetermined light distribution characteristic is a cross section along the lane direction of the tunnel 2 shown in FIG. 13 so as to irradiate light mainly over the entire road surface of the roadway in the tunnel cross section shown in FIG. Thus, the illumination light from the lighting fixtures 3 adjacent to each other is diffused and overlapped with each other, so that the brightness is substantially uniform in the lane direction on the road surface of the roadway.

  On the other hand, as shown in FIG. 14, a tunnel lighting system 4 is also known in which lighting fixtures 3 are respectively installed near the left and right sides of the ceiling of the tunnel 2 (that is, near the upper side walls on both sides) in the cross section of the tunnel. ing. FIG. 14 is a schematic cross-sectional view showing another conventional tunnel illumination system 4.

  In this case, for example, the illumination light emitted from the lighting device 3 on one side in the cross section of the tunnel irradiates the road surface of the opposite roadway, and the lighting devices 3 on both sides irradiate the illumination light crossing each other. Yes.

By the way, the following patent document 1 discloses a roadway outer line illumination device that illuminates a roadway outer line for identifying a road shoulder and a roadway.
JP 2002-260401 A

  In the conventional tunnel lighting systems 1 and 4 described above, the light from the lighting fixture 3 is irradiated so as to have substantially uniform brightness on the road surface along the lane direction. At the start of service, the outer lines were relatively easy to see and there was no particular problem with running, but it became difficult to see due to deterioration over time, and the running vision environment was poor.

  Therefore, the visibility of the roadway outer line near the roadside, the shoulder of the road, and the lower part of the side wall is not good, and it is difficult to say that the vehicle traveling in the tunnel can be performed sufficiently safely and comfortably.

  Moreover, when the low-pressure sodium lamp is used as the light source unit, the lighting fixture 3 in the conventional tunnel lighting systems 1 and 4 described above has a relatively short average life of about 9000 hours. On the other hand, since it is difficult to perform the lamp replacement work every time the lamp becomes unsatisfactory because traffic regulation is required, even if the light source part becomes unsatisfactory, periodic lamp replacement work Until then, it may be left unsatisfactory.

  Therefore, when the lighting device 3 has a defect, the illumination light from the lighting device 3 is lost, so that the brightness of the tunnel illumination in the vicinity of the lighting device 3 decreases, and the brightness uniformity in the lane direction (uniformity) Degree). As a result, the visual environment in the tunnel is deteriorated, the driver's fatigue is increased, the obstacle identification judgment is lowered, and the safety is impaired.

  Furthermore, in the conventional tunnel lighting systems 1 and 4 described above, even if the brightness on the road surface is reduced due to the aging of the lighting fixture 3 or the brightness of the light source unit due to secular change, the reference brightness is satisfied. It is configured. However, if the roadside outer line near the roadside, the road shoulder, or the lower part of the side wall is contaminated by exhaust gas or the like, these visibility will be further deteriorated. There is a problem that it becomes difficult to travel because it becomes difficult to recognize.

  Moreover, the roadway outside line illuminating device disclosed in Patent Document 1 is not particularly intended to improve the illumination in the tunnel.

  Furthermore, in the tunnel illumination system, it is required that the luminaire constituting the tunnel illumination system is small and inexpensive, and that the installation work is easy and the installation cost is low.

  The present invention has been made in view of such circumstances, and can assist basic lighting to improve visibility of a roadway outer line near the roadside in the tunnel, a road shoulder, or a lower side wall, thereby further safety. Tunnel lighting that can support vehicle driving in a comfortable and comfortable tunnel, and the lighting equipment constituting the tunnel lighting system is small and inexpensive, and the installation work is easy and the installation cost can be reduced. It is an object of the present invention to provide a system and a tunnel luminaire used therefor.

  In order to solve the above problems, a tunnel lighting system according to a first aspect of the present invention includes a plurality of lighting fixtures installed along the lane direction in a tunnel, and each of the lighting fixtures is (i) mainly in a tunnel. A first light source unit that irradiates illumination light toward the road surface of the roadway by overlapping the illumination light from the first light source unit of the lighting device adjacent to the lighting device in the lane direction. A first light source unit for performing basic illumination with substantially uniform brightness in the lane direction on the road surface of the roadway, and (ii) of the roadway outer line near the roadside in the tunnel, the road shoulder, and the lower side wall And a second light source unit that irradiates illumination light toward at least one.

  According to the tunnel illumination system according to the first aspect, each luminaire includes the second light source unit that irradiates illumination light to the vicinity of the roadside separately from the basic illumination. A nearby roadway outer line, a road shoulder and / or a side wall lower part is actively illuminated by the second light source unit.

  Therefore, the brightness in the vicinity of the roadside is enhanced by the illumination by the second light source unit. Therefore, the visibility of the roadside outer line near the roadside, the shoulder of the road, and the lower part of the side wall is enhanced, and the vehicle traveling in the tunnel can be performed more safely and comfortably.

  Further, even if the vicinity of the roadside becomes difficult to see due to dirt or the like due to secular change, the vicinity of the roadside is improved for the driver by the bright illumination of the vicinity of the roadside by the second light source unit. Therefore, even if the roadside vicinity becomes difficult to see due to dirt or the like due to secular change, the vehicle traveling in the tunnel can be performed more safely and comfortably.

  Furthermore, even if the brightness of the road surface due to the basic illumination is reduced due to the disadvantage of the basic illumination or the uniformity of the brightness due to the illumination in the lane direction is reduced, the vicinity of the roadside is illuminated by the second light source unit. Accordingly, at least visibility near the roadside can be ensured, so that the safety and comfort of traveling in the tunnel can be improved.

  Further, according to the first aspect, since one lighting fixture has both the first light source and the second light source, compared to the case where both light sources are provided in separate lighting fixtures, The size can be reduced and the cost can be reduced, the installation work can be facilitated, and the installation cost can be reduced.

  The tunnel lighting system according to a second aspect of the present invention is the tunnel lighting system according to the first aspect, wherein the lighting fixture is arranged near the center of the ceiling in a cross section of the tunnel, and the second light source unit is located inside the lighting fixture. The second light source section on each side irradiates illumination light toward the roadside on the opposite side in the cross section of the tunnel.

  According to the second aspect, the second light source parts provided near both sides in the lane crossing direction in the lighting fixture cross each other toward the roadside on the opposite side, and the illumination light is transmitted. Will be irradiated. For this reason, a lighting fixture can be reduced further.

  The tunnel illumination system according to a third aspect of the present invention is the tunnel illumination system according to the first aspect, wherein the lighting fixture is disposed near both sides of the ceiling or near the upper part of the side walls on both sides in the tunnel cross section. Irradiates illumination light toward the roadside near the side opposite to the side where the luminaire is arranged.

  The tunnel lighting system according to a fourth aspect of the present invention is the tunnel lighting system according to the first aspect, wherein the lighting fixture is disposed near both sides of the ceiling or near the upper side wall on both sides in the tunnel cross section. Irradiates illumination light toward the vicinity of the roadside on the same side as the side on which the luminaire is disposed.

  Whereas the second aspect is an example in which the luminaire is disposed near the center of the tunnel, the third and fourth aspects are examples in which the luminaire is disposed near both sides of the tunnel. . When the luminaire is disposed near both sides of the tunnel, the second light source may irradiate illumination light near the road side on either side as in the third and fourth aspects.

  The tunnel illumination system according to a fifth aspect of the present invention is the tunnel illumination system according to any one of the first to fourth aspects, wherein the second light source unit is a lane in the vicinity of the roadside by illumination light from the second light source unit. It is composed of a plurality of light emitting elements arranged so that the directions of two or more light emitting elements of the plurality of light emitting elements are different from each other so that the degree of uniformity regarding the direction is increased.

  According to the fifth aspect, a lens system for converging and diverging light from each light emitting element is not required, and therefore, the size can be further reduced. Further, according to the fifth aspect, since the brightness approaches a uniform brightness in the vicinity of the road with respect to the lane direction, the driver is less discomfort due to a periodic change in brightness, and the visibility is further improved. It will be. It is more effective as auxiliary lighting for basic lighting.

  The tunnel illumination system according to a sixth aspect of the present invention is the tunnel illumination system according to the fifth aspect, wherein the plurality of light emitting elements are arranged at curved positions that are concave on the light emission side. Here, the curved shape includes not only an arc shape but also a shape by a combination of planes such as a part of a regular polygon.

  According to the sixth aspect, since the plurality of light emitting elements are arranged at the curved positions that are concave on the light emitting side, the plurality of light emitting elements protrude unnecessarily on the light emitting side. The lighting apparatus can be further downsized.

  A tunnel illumination system according to a seventh aspect of the present invention includes, in any one of the first to sixth aspects, an angle adjustment mechanism that adjusts an angle of the second light source unit around an axis extending in the lane direction. It is a thing.

  According to the seventh aspect, after the lighting fixture is installed at the center or side of the ceiling in the tunnel, the angle of the second light source unit around the axis is adjusted by the angle adjustment mechanism in the lighting fixture. By adjusting, it is possible to irradiate the light from the second light source unit appropriately toward the roadside without depending on the cross-sectional shape of the tunnel or the like.

  The tunnel illumination system according to an eighth aspect of the present invention is the tunnel illumination system according to any one of the first to seventh aspects, wherein the illumination light from the second light source unit is white light.

  According to the eighth aspect, the white light from the second light source unit illuminates the roadway outer line near the roadside, the road shoulder and / or the lower part of the side wall. Even when the first light source part of light is used, the color rendering near the road side is greatly improved, and the visibility near the road side is improved.

  In the tunnel illumination system according to a ninth aspect of the present invention, in any one of the first to eighth aspects, the illumination light from the second light source unit is different from the illumination light from the first light source unit. It is the light of color.

  According to the ninth aspect, when the first light source unit of monochromatic light such as a low-pressure sodium lamp is used as the basic illumination, the second light source unit emits white light, and the basic illumination For example, when the first light source unit using a white fluorescent lamp is used, the second light source unit emits yellow light, for example, so that the roadway outer line near the road side, the road shoulder or the lower side of the side wall is the basic illumination. It will be highlighted and illuminated with a different color, improving the visibility near the roadside and making it easier to drive.

  In the tunnel illumination system according to the tenth aspect of the present invention, the light distribution of the second light source unit when viewed from one side in the tunnel transverse direction is substantially a predetermined angle at which the vertical angle is 60 ° or less. It is set to the range.

  According to the tenth aspect, the light from the second light source is less likely to enter the driver's field of view, thereby preventing the driver from being dazzled by the light from the second light source. This makes it possible to drive the vehicle in a safer and more comfortable tunnel.

  The eleventh to twentieth aspects of the present invention described below correspond to the first to tenth aspects, respectively. The tunnel illumination fixtures according to the eleventh to twentieth aspects of the present invention can be used in the tunnel illumination system according to the first to tenth aspects, respectively.

  A tunnel lighting fixture according to an eleventh aspect of the present invention includes a first light source unit that emits illumination light mainly toward a road surface of a roadway in the tunnel, a roadway outer line, a road shoulder, and a side wall near the roadside in the tunnel. And a second light source unit that emits illumination light toward at least one of the lower portions.

  A tunnel lighting fixture according to a twelfth aspect of the present invention is the tunnel lighting fixture according to the eleventh aspect, wherein the lighting fixture is arranged near the center of the ceiling in the cross section of the tunnel, and the second light source unit is located inside the lighting fixture. The second light source section on each side irradiates illumination light toward the roadside on the opposite side in the cross section of the tunnel.

  According to a thirteenth aspect of the present invention, in the eleventh aspect, the lighting device is disposed near one side of the ceiling or near the upper side wall on one side in the tunnel cross section. A light source part irradiates illumination light toward the roadside vicinity on the opposite side to the side by which the said lighting fixture is arrange | positioned.

  According to a fourteenth aspect of the present invention, in the eleventh aspect, the lighting device is arranged near one side of the ceiling or near the upper side wall on one side in the tunnel cross section, A light source part irradiates illumination light toward the roadside vicinity of the same side as the side by which the said lighting fixture is arrange | positioned.

  In the tunnel lighting fixture according to a fifteenth aspect of the present invention, in any one of the eleventh to fourteenth aspects, the second light source unit is a lane in the vicinity of the roadside by illumination light from the second light source unit. It is composed of a plurality of light emitting elements arranged so that the directions of two or more light emitting elements of the plurality of light emitting elements are different from each other so that the degree of uniformity regarding the direction is increased.

  According to a sixteenth aspect of the present invention, in the fifteenth aspect, the plurality of light emitting elements are arranged at positions that form a curved shape that is concave on the light emitting side thereof.

  A tunnel lighting fixture according to a seventeenth aspect of the present invention includes, in any one of the eleventh to sixteenth aspects, an angle adjustment mechanism that adjusts an angle of the second light source unit around an axis extending in the lane direction. It is a thing.

  In the tunnel lighting fixture according to the eighteenth aspect of the present invention, in any of the eleventh to seventeenth aspects, the illumination light from the second light source unit is white light.

  In a tunnel lighting fixture according to a nineteenth aspect of the present invention, in any one of the eleventh to eighteenth aspects, the illumination light from the second light source unit is different from the illumination light from the first light source unit. It is the light of color.

  In the tunnel lighting fixture according to the twentieth aspect of the present invention, in any one of the eleventh to nineteenth aspects, the light distribution of the second light source unit when viewed from one side in the tunnel crossing direction is substantially Specifically, the vertical angle is set within a predetermined angle range of 60 ° or less.

  According to the present invention, the basic lighting can be assisted to improve visibility of the roadway outer line near the roadside in the tunnel, the road shoulder, or the lower part of the side wall, thereby supporting the vehicle traveling in the tunnel more safely and comfortably. In addition, the lighting equipment constituting the tunnel lighting system is small and inexpensive, and the installation work is easy and the installation cost can be reduced. A tunnel luminaire can be provided.

  Hereinafter, a tunnel lighting system and a tunnel lighting fixture according to the present invention will be described with reference to the drawings.

  [First Embodiment]

  FIG. 1 is a schematic cross-sectional view showing a tunnel illumination system 10 according to a first embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view showing a part of the tunnel illumination system 10. FIG. 3 is a schematic longitudinal sectional view showing more parts of the tunnel illumination system 10.

  As shown in FIGS. 1 to 3, the tunnel illumination system 10 according to the present embodiment is equidistant in the tunnel 11 along the lane direction (the direction perpendicular to the paper surface in FIG. 1, the left-right direction in FIGS. 2 and 3). A plurality of lighting fixtures (tunnel lighting fixtures) 20 are provided.

  In this case, as shown in FIG. 1, each lighting fixture 20 is disposed near the center of the ceiling in the tunnel cross section.

  Here, each lighting fixture 20 is configured as shown in FIGS. 4 and 5. FIG. 4 is a schematic bottom view of the lighting fixture 20 in which the first light source unit 22 is omitted. FIG. 5 is a partially cutaway schematic side view of the lighting fixture 20. FIG. 6 is a schematic partially enlarged perspective view showing the second light source unit 24 and its angle adjustment mechanism in the lighting fixture 20.

  As shown in FIGS. 4 to 6, the luminaire 20 includes a flat rectangular parallelepiped hollow casing 21 and a lane crossing direction (the horizontal direction in FIG. 1, FIGS. 2 and 3 in the casing 21). A first light source unit 22 supported so as to extend in a direction perpendicular to the plane of the paper, a horizontal direction in FIG. 4 and a direction perpendicular to the plane of FIG. 5, and a reflection member 23 disposed above the first light source unit 22; And a pair of second light source parts 24 housed in the vicinity of both end edges of the housing 21.

  The housing 21 includes an attachment portion 21a having an attachment screw hole for attaching the lighting fixture 20 to the ceiling of the tunnel 11, and includes a window portion 21b on the lower surface.

  Since the 1st light source part 22 and the reflection member 23 are the structures similar to the 1st light source part and reflection member in the lighting fixture 3 employ | adopted with the conventional tunnel illumination system 1 shown in FIG. 11 thru | or FIG. Detailed description thereof will be omitted.

  The first light source unit 22 is, for example, a low-pressure sodium lamp, and emits orange illumination light L1. The first light source unit 22 is reflected directly or by the reflecting member 23, and passes through the window portion 21b. Similar to the luminaire 3 shown in FIGS. 11 to 13, the light distribution characteristics are such that the light is diffused in the cross section along the lane direction and overlaps each other, so that almost uniform brightness is obtained on the road surface of the roadway. Is supposed to be granted. Instead of the low-pressure sodium lamp, a discharge lamp such as a fluorescent lamp or an HID lamp (high-intensity discharge lamp. For example, a high-pressure sodium lamp, a mercury lamp, or a metal halide lamp) is used as the first light source unit 22. Also good.

  On the other hand, a plurality of second light source units 24 are mounted side by side on a long and narrow support member 25 that is curved downward (that is, on the light emission side) in the vicinity of both sides in the lane crossing direction in the housing 21. It is comprised from the light emitting element 26 of the piece (in the case of illustration, 10 pieces).

  The support member 25 is made of, for example, a plate-like metal, plastic, or the like, and has a shaft 28 extending in the lane direction with respect to the attachment member 27 fixed to a fixing portion 21c provided at both ends of the support member 25. Is attached to be swingable.

  For example, as shown in FIG. 6, the support member 25 includes a pin 25 a that protrudes inward in the lane direction in the vicinity of both ends of the support member 25, and an arc-shaped groove 27 a centering on the shaft 28 formed in the mounting member 27. By engaging the inside, it can swing within a predetermined angle range as indicated by an arrow A, and is fixed at a predetermined angle by an appropriate means (not shown) such as a nut screwed to the pin 25a. It can be held. In addition, the angle adjustment mechanism of such a support member 25 and the 2nd light source part 24 is only an illustration, You may employ | adopt the angle adjustment mechanism of another structure.

  Here, the curvature radius of the curved portion of the support member 25 is such that the light distribution characteristics of the light L2 emitted from each light emitting element 26 are adjacent to each other in the vicinity of the roadside as shown in FIGS. The light from the second light source unit 24 is selected so as to overlap each other in the lane direction so that substantially uniform brightness is obtained in the lane direction as a whole.

  Further, as shown in FIG. 2, the light distribution of the light L2 when viewed from one side in the tunnel crossing direction is set to an angular range from the vertical angle θ1 on one side to the vertical angle θ2 on the other side. . In the present embodiment, θ1≈θ2 and θ1, θ2 ≦ 60 ° are set. Thus, setting θ1, θ2 ≦ 60 ° makes it difficult for the light L2 to enter the driver's field of view, so that it is possible to prevent the driver from being dazzled by the light L2 and to be safer. This makes it possible to drive the vehicle in a comfortable tunnel, which is preferable. However, the present invention is not limited to the vertical angles θ1, θ2 ≦ 60 °.

  The curved portion of the support member 25 is not limited to the arc shape as shown in FIG. 6, and forms a light distribution characteristic such that light emitted from each light emitting element 26 supported by the support member 25 diffuses in the lane direction. For example, the shape may be a combination of planes such as a part of a regular polygon, and at least one light emitting element 26 may be mounted on each plane.

  The second light source unit 24 emits light emitted from the second light source unit 24 when the support member 25 is swung around the shaft 28 with respect to the housing 21 when the lighting fixture 20 is installed. Is irradiated through the window 21b toward the roadside outer line 11a, the road shoulder 11b, and the side wall lower part 11c (may be any one or more of them) in the vicinity of the roadside in the tunnel 11. Adjusted.

  The light emitting element 26 is, for example, an LED with low power consumption and long life, and preferably emits a light emission color different from the light emission color of the first light source unit 22, for example, white light L2.

  Installation of the lighting fixture 20 in the tunnel 11 is performed as follows. That is, the luminaire 20 is installed side by side in the lane direction near the center of the ceiling in the tunnel 11. At that time, the light from the first light source unit 22 overlaps the light from the first light source unit 22 of the lighting fixture 20 adjacent in the lane direction in the lane direction, and is substantially uniform in the lane direction as a whole. The intervals between the lighting fixtures 20 are appropriately selected and installed so as to be bright.

  Then, with respect to each lighting fixture 20 installed in the vicinity of the center of the ceiling in the tunnel 11 in this way, the second light source unit 24 attached near the both sides of the casing 22 respectively attaches the support member 25 to the attachment member. The light L2 emitted from each light emitting element 26 of the second light source unit 24 is adjusted to swing with respect to 27, toward the roadway outer line 11a, the road shoulder 11b, or the side wall lower part 11c near the opposite roadside. The adjustment is performed so as to proceed, and thereafter, it is fixedly held to the attachment member 27 of the housing 22.

  This completes the installation of the lighting fixture 20 in the tunnel 11.

  Next, the operation of the tunnel illumination system 10 according to this embodiment will be described.

  First, the light emitted from the first light source unit 22 is reflected by the reflecting member 23 as a basic illumination and has a desired light distribution characteristic as in the lighting fixture 3 of the tunnel illumination system 1 shown in FIGS. The light is emitted toward the road surface in the tunnel 11. At this time, as shown in FIG. 1, in the cross section of the tunnel, the light L1 from the first light source unit 22 is irradiated with a predetermined brightness mainly over substantially the entire road surface.

  In addition, the light L2 emitted from the second light source unit 24 is directed toward the opposite side of the road, that is, in FIG. 1, by adjusting the swing of the support member 25 (angle adjustment of the second light source unit 24). The light L2a emitted from the second light source unit 24 located near the right side of the housing 22 of the lighting fixture 20 is located near the left side of the tunnel 11 and near the left side of the housing 22. Light L <b> 2 b emitted from the second light source unit 24 is irradiated toward the right side of the tunnel 11. At this time, since the support member 25 is curved in the lane direction, the light from the light emitting element 26 is diffused and irradiated along the lane direction as a whole. Since no system is required and the support member 25 is curved in a concave shape, it does not protrude outside the housing 22 and can be made compact.

  Accordingly, the roadway outer line 11a, the road shoulder 11b, and the side wall lower part 11c in the vicinity of the road sides on both sides are illuminated with a predetermined brightness by the light L2 from the second light source unit 24. Therefore, the vicinity of the roadside where the brightness of the illumination light L1 from the first light source unit 22 as the basic illumination becomes relatively low is illuminated by the light L2 from the second light source unit 24, thereby the vicinity of the roadside. Visibility is improved. Therefore, the driver of the automobile traveling in the tunnel 11 can easily drive while confirming the roadway outer line 11a, for example, and safety and comfort are improved.

  At that time, among the light L2 from the second light source unit 24, the light emitted at a small angle with respect to the lane direction is blocked by the edge of the window portion 21b of the housing 22, and thus travels in the tunnel 11. The driver of the automobile does not look directly at the second light source unit 24, and no glare is generated.

  In addition, for example, when the first light source unit 22 of one lighting fixture 20 becomes unsatisfactory, the irradiation of the light L1 on the road surface by the first light source unit 22 is interrupted, so that the brightness on the road surface of the roadway decreases. In addition, with respect to the lane direction, the uniform brightness due to the light L1 from the first light source unit 22 of each lighting fixture 20 is impaired, but even in that case, the second light source unit 24 is near the roadside. Since the irradiation of the light L2 is continued, the brightness in the lane direction in the vicinity of the roadside is kept substantially uniform.

  Therefore, even if the first light source unit 22 becomes inconspicuous, the second light source unit 24 irradiates the light L2 near the roadside, so that the roadside vicinity is relatively bright and the driver's visibility is ensured. Will not be compromised.

  Similarly, even if the light emission intensity of the first light source unit 22 decreases due to aging, and dirt or the like due to aging occurs on the roadway outer line 11a, the road shoulder 11b, or the side wall lower portion 11c near the roadside, The vicinity of the roadside is brightly illuminated by the light L2 from the second light source unit 22, so that the visibility does not deteriorate so much.

  Thus, according to the tunnel lighting system 10 according to the present embodiment, the roadway outer line 11a, the road shoulder 11b, and the side wall lower portion 11c in the vicinity of the roadside are separated from the second light source unit 24 accommodated in the lighting fixture 20. Illuminated by light L2. As a result, the visibility in the vicinity of the roadside is greatly improved, so that driver fatigue is reduced and safety is improved.

  Moreover, according to this Embodiment, since the one lighting fixture 20 has both the 1st light source 22 and the 2nd light source 24, both light sources 22 and 24 are each provided in a separate lighting fixture. Compared to the case, the size can be reduced and the cost can be reduced, the installation work can be facilitated, and the installation cost can be reduced.

  Furthermore, as described above, if the light emission color of the second light source unit 24 is different from the light emission color of the first light source unit 22, the vicinity of the road side stands out due to the difference in color, and the visibility near the road side is more enhanced. Since it improves further, it is preferable.

  In addition, it is preferable to emit white light from the second light source unit 24, since the color rendering property near the road side is greatly improved and the visibility near the road side is improved.

  [Second Embodiment]

  FIG. 7 is a schematic cross-sectional view showing a tunnel illumination system 30 according to the second embodiment of the present invention. FIG. 8 is a schematic longitudinal sectional view showing a part of the tunnel illumination system shown in FIG. FIG. 9 is a schematic longitudinal sectional view showing more parts of the tunnel illumination system shown in FIG.

  As shown in FIGS. 7 to 9, the tunnel lighting system 30 according to the present embodiment includes a plurality of lighting fixtures 32 arranged at equal intervals on the ceiling along the lane direction in the tunnel 31.

  In this case, as shown in FIG. 7, the respective lighting fixtures 32 are arranged on both the left and right sides of the ceiling of the tunnel 31 (near the upper portions of the left and right side walls of the tunnel 31) in the tunnel cross section.

  Here, the luminaire 32 is configured in substantially the same manner as the luminaire 20 shown in FIGS. 4 to 6, but the second light source unit 24 is provided only on one side (in the case of the road side). It has a different structure. But the lighting fixture 32 may be equipped with the 2nd light source part 24 only on the other side conversely.

  Here, the second light source unit 24 of each lighting fixture 32 is respectively connected to the roadway outer line 31a, the road shoulder 31b, and the side wall lower portion 31c in the vicinity of the roadside opposite to the side where the lighting fixture 32 of the tunnel 31 is attached. 1 or more of them may be irradiated) toward the light L2.

  Note that the second light source unit 24 is similar to the second light source unit 24 of the lighting fixture 20 in the tunnel lighting system 10 described above, as shown in FIGS. 8 and 9, and the lighting fixture 32 adjacent in the lane direction. By overlapping the light L2 from the second light source unit 24 with each other, it is arranged so as to have substantially uniform brightness in the lane direction. Also in this embodiment, the light distribution of the light L2 when viewed from one side in the tunnel crossing direction is from the vertical angle θ1 on one side to the vertical angle θ2 on the other side, as shown in FIG. The angle range is set such that θ1≈θ2 and θ1, θ2 ≦ 60 °. Further, the first light source 22 can obtain the same light distribution characteristic as that of the luminaire 3 employed in the conventional tunnel illumination system 4 shown in FIG.

  In the tunnel lighting system 30 according to this embodiment, after the respective lighting fixtures 32 are installed on the left and right sides of the ceiling of the tunnel 31, the second light source parts 24 of the respective lighting fixtures 32 are respectively located near the opposite road side. Swing adjustment (angle adjustment) is done and fixed.

  As described above, according to the tunnel illumination system 30 installed in the tunnel 31, the light (not shown) emitted from the first light source unit 22 is directed toward the road surface of the opposite roadway as in FIG. In addition to the irradiation, the light L2 emitted from the second light source unit 24 is irradiated toward the opposite side of the road as shown in FIG.

  Accordingly, the roadway outer line 31a, the road shoulder 31b, and the side wall lower part 31c in the vicinity of the roadsides on both sides are illuminated with a predetermined brightness by the light L2 from the second light source unit 24. The vicinity of the roadside where the brightness of the illumination light from the first light source unit 22 becomes relatively low is illuminated by the light L2 from the second light source unit 24, thereby improving the visibility near the roadside. . Therefore, for example, it is possible to drive comfortably while checking the roadway outer line 31a, and safety and comfort are improved.

  Thus, according to the tunnel illumination system 30 according to the present embodiment, the tunnel illumination system 10 shown in FIGS. 1 to 3 operates in the same manner as the tunnel illumination system 10 shown in FIGS. Similar advantages are obtained.

  [Third Embodiment]

  FIG. 10 is a schematic cross-sectional view showing a tunnel illumination system 40 according to the third embodiment of the present invention.

  As shown in FIG. 10, the tunnel lighting system 40 according to the present embodiment includes a plurality of lighting fixtures 42 arranged at equal intervals on the ceiling in the tunnel 41 along the lane direction.

  In this case, as shown in FIG. 10, each lighting fixture 42 is disposed on both the left and right sides of the ceiling of the tunnel 41 (near the upper portions of the left and right side walls of the tunnel 31) in the tunnel cross section.

  Here, the luminaire 42 is configured in substantially the same manner as the luminaire 32 of the tunnel illumination system 30 shown in FIGS. 7 to 9, but the second light source unit 24 is located on one side (in the illustrated case, near the center). ) Is different in that it is only provided. But the lighting fixture 42 may be equipped with the 2nd light source part 24 only on the other side conversely.

  Here, the second light source part 24 of each lighting fixture 42 is respectively a roadway outer line 41a, a road shoulder 41b, and a side wall lower portion 41c in the vicinity of the roadside on the side where the lighting fixture 32 of the tunnel 41 is attached. Arbitrary one or more may be provided.) It arrange | positions so that the light L2 may be irradiated toward.

  In addition, the 2nd light source part 24 is the 2nd light source part 24 of the lighting fixture 42 with which the emitted light L2 is the same as the 2nd light source part 24 of the lighting fixture 32 in the tunnel illumination system 30 mentioned above. By overlapping each other, the light is arranged so as to have almost uniform brightness in the lane direction. Although not shown in the drawings, also in the present embodiment, the light distribution of the light L2 when viewed from one side in the tunnel crossing direction is an angle from the vertical angle θ1 on one side to the vertical angle θ2 on the other side. The range is set, and θ1≈θ2 is set. However, in this embodiment, as can be seen from FIG. 10, the light L2 does not enter the driver's field of view even when θ1, θ2> 60 °. Further, the first light source 22 can obtain the same light distribution characteristic as that of the lighting fixture 3 employed in the conventional tunnel lighting system 4 shown in FIG.

  In the tunnel lighting system 40 according to the present embodiment, after the respective lighting fixtures 42 are respectively installed on the left and right sides of the ceiling of the tunnel 41, the second light source parts 24 of the respective lighting fixtures 42 are respectively located near the road side on the same side. Swing adjustment (angle adjustment) is done and fixed.

  As described above, according to the tunnel illumination system 40 installed in the tunnel 41, the light (not shown) emitted from the first light source unit 22 is directed toward the road surface of the opposite roadway as in FIG. In addition to irradiation, the light L2 emitted from the second light source unit 24 is irradiated toward the vicinity of the road side on the same side as shown in FIG.

  Accordingly, the roadway outer line 41a, the road shoulder 41b, and the side wall lower portion 41c near the roadsides on both sides are illuminated with a predetermined brightness by the light L2 from the second light source unit 24. The vicinity of the roadside where the brightness of the illumination light from the first light source unit 22 becomes relatively low is illuminated by the light L2 from the second light source unit 24, thereby improving the visibility near the roadside. . Therefore, for example, it is possible to drive easily while checking the roadway outer line 41a, and safety and comfort are improved.

  Thus, according to the tunnel illumination system 40 according to the present embodiment, the tunnel illumination system 30 shown in FIGS. 7 to 9 operates in the same manner as the tunnel illumination system 30 shown in FIGS. Similar advantages are obtained.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

  For example, in the above-described embodiment, the first light source unit 22 is configured by a low-pressure sodium lamp, while the second light source unit 24 is configured by a white LED, but is not limited thereto. Instead, the emission color of the second light source unit 24 may be selected to be different from the emission color of the first light source unit 22. For example, when the first light source unit 22 is a light source unit that emits white light such as a fluorescent lamp or a discharge lamp such as an HID, for example, a light source unit that emits yellow light is used as the second light source unit 24. Thereby, the roadside outer line near the roadside illuminated by the second light source unit 24, the road shoulder or the lower portion of the side wall is illuminated with emphasis in a color different from the basic illumination by the first light source unit 22, The visibility near the roadside is further improved.

  In the above-described embodiment, the second light source unit 24 uses the LED 26 as a light emitting element. However, the present invention is not limited to this, and other light emitting elements such as a semiconductor laser element may be used. .

1 is a schematic cross-sectional view showing a tunnel illumination system according to a first embodiment of the present invention. It is a schematic longitudinal cross-sectional view which shows a part of tunnel illumination system shown in FIG. It is a schematic longitudinal cross-sectional view which shows more parts of the tunnel illumination system shown in FIG. It is a schematic bottom view which shows the lighting fixture used with the tunnel lighting system shown in FIG. It is a partially cutaway schematic side view of the lighting fixture shown in FIG. It is a general | schematic partial expansion perspective view which shows the 2nd light source part in the lighting fixture shown in FIG. 4, and its angle adjustment mechanism. It is a schematic cross-sectional view which shows the tunnel illumination system by the 2nd Embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows a part of tunnel illumination system shown in FIG. It is a schematic longitudinal cross-sectional view which shows more parts of the tunnel illumination system shown in FIG. It is a schematic cross-sectional view which shows the tunnel illumination system by the 3rd Embodiment of this invention. It is a schematic cross-sectional view showing an example of a conventional tunnel illumination system. It is a schematic longitudinal cross-sectional view which shows a part of tunnel illumination system shown in FIG. It is a schematic longitudinal cross-sectional view which shows more parts of the tunnel illumination system shown in FIG. It is a schematic cross-sectional view showing another example of a conventional tunnel illumination system.

Explanation of symbols

10, 30, 40 Tunnel lighting system 11, 31, 41 Tunnel 20, 32, 42 Lighting fixture 21 Housing 22 First light source section (for basic lighting)
23 reflection member 24 2nd light source part (for auxiliary illumination)
25 Support member 25a Pin 27a Groove 26 Light emitting element 27 Mounting member 28 Axis

Claims (14)

A plurality of lighting fixtures installed along the lane direction in the tunnel,
Each of the lighting fixtures is (i) a first light source unit that emits illumination light mainly toward a road surface in a tunnel, and is a first light source of the lighting fixture that is adjacent to the lighting fixture in the lane direction. A first light source unit for performing basic illumination with substantially uniform brightness in the lane direction on the road surface of the roadway by overlapping with the illumination light from the unit, and (ii) near the roadside in the tunnel the roadway outside line, toward at least one of the shoulder and sidewall lower, have a, a second light source unit for emitting illumination light,
The lighting fixture is arranged near the center of the ceiling in the cross section of the tunnel,
The second light source portions are respectively arranged near both sides in the lane crossing direction in the lighting fixture,
The tunnel light system characterized in that the second light source unit on each side irradiates illumination light toward the roadside near the opposite side in the tunnel cross section . In the second light source unit, the orientations of two or more light emitting elements of the plurality of light emitting elements are increased so that the degree of uniformity in the lane direction is increased near the roadside by illumination light from the second light source unit. The tunnel illumination system according to claim 1 , wherein the tunnel illumination system includes a plurality of light emitting elements arranged differently from each other. The tunnel lighting system according to claim 2, wherein the plurality of light emitting elements are arranged at curved positions that are concave on the light emitting side thereof. The tunnel illumination system according to any one of claims 1 to 3 , further comprising an angle adjustment mechanism that adjusts an angle of the second light source unit around an axis extending in a lane direction. Tunnel illumination system as claimed in any one of claims 1 to 4, characterized in that illuminating light from the second light source unit is white light. The tunnel illumination system according to any one of claims 1 to 5 , wherein the illumination light from the second light source unit is light having a color different from that of the illumination light from the first light source unit. 2. The light distribution of the second light source unit when viewed from one side in the tunnel longitudinal direction is set to a predetermined angle range in which a vertical angle is substantially 60 ° or less. The tunnel lighting system in any one of thru | or 6 . A first light source that emits illumination light mainly toward the road surface of the roadway in the tunnel;
A second light source unit that irradiates illumination light toward at least one of a roadway outer line near the roadside in the tunnel, a road shoulder, and a lower side wall;
Equipped with a,
The lighting equipment is arranged near the center of the ceiling in the cross section of the tunnel,
The second light source portions are respectively arranged near both sides in the lane crossing direction in the lighting fixture,
The tunnel light fixture characterized in that the second light source unit on each side irradiates illumination light toward the roadside near the opposite side in the tunnel cross section . In the second light source unit, the orientations of two or more light emitting elements of the plurality of light emitting elements are increased so that the degree of uniformity in the lane direction is increased near the roadside by illumination light from the second light source unit. a plurality of light emitting elements arranged differently from one another, characterized in that it is configured, according to claim 8, wherein the tunnel luminaire. The tunnel light fixture according to claim 9, wherein the plurality of light emitting elements are arranged at a curved position that is concave on the light emitting side thereof. Tunnel illumination device according to any of claims 8 to 10, characterized in that it comprises an angle adjusting mechanism for adjusting the angle of the second light source unit about an axis extending in the lane direction. Tunnel illumination device according to any of claims 8 to 11, wherein the illumination light from the second light source unit is white light. The tunnel illumination fixture according to any one of claims 8 to 12 , wherein the illumination light from the second light source unit is light having a color different from that of the illumination light from the first light source unit. The light distribution of the second light source section when viewed from one side of the tunnel transverse claim 8, characterized in that substantially the vertical angle is set to a predetermined angle range is 60 ° or less The tunnel lighting fixture in any one of thru | or 13 .

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