JP2013093194A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of uniformly lighting a road surface to be irradiated with illumination light in a tunnel at high illumination intensity.SOLUTION: The lighting device 100 includes a light source unit storage case 110, an upper light source unit 120, and a lower light source unit 130. The upper light source unit 120 includes: a base section 121 for the upper light source element; first upper light source elements 122A; and second upper light source elements 122B. The lower light source unit 130 includes: a base section 131 for a lower light source element; first lower light source elements 132A; and second lower light source elements 132B.

Description

  The present invention relates to a lighting device used in a tunnel or the like.

Conventionally, as a lighting device installed in a tunnel, a lighting device that emits a light distribution that approximates a cosine curve with respect to a longitudinal section of the tunnel (for example, see Patent Document 1) or uneven illuminance. Some have been suppressed (for example, see Patent Document 2).
In addition, there is an LED that uses an LED to suppress unnecessary power consumption and efficiently uses light to increase the illuminance within the light irradiation range (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 9-82111 (refer to claim 1, FIG. 1) Japanese Patent Laid-Open No. 7-272508 (refer to claim 1, FIG. 1) JP 2010-67367 A (refer to claim 1 and FIG. 1).

However, in a tunnel where external light is not inserted, the amount of light emitted from the light source of the lighting device is increased to illuminate the road surface with uniform and high illuminance, which increases the power consumption of the lighting device. It was.
In addition, when a light source such as a fluorescent lamp is used for the lighting device in the tunnel, light is emitted from the light source in all directions, so that light that is not irradiated on the road surface is generated, resulting in a decrease in road surface illumination and uniformity thereof. There was a problem.

  Therefore, a technical problem to be solved by the present invention, that is, an object of the present invention is to provide a lighting device that improves road surface illumination and uniformity in a tunnel and avoids an increase in power consumption.

  First, an illuminating device according to the first aspect of the present invention is installed on the wall surface of the tunnel in a state where it is inclined to the road surface within a tunnel cross section intersecting the direction of passage in the tunnel, and illumination light is applied to the road surface from a light emitting region A light source unit storage case including a case substrate fixed to the wall surface, an upper light source unit installed on the case substrate, and installed on the case substrate below the upper light source unit And installed on the case substrate to form a lower light source unit installation angle that is larger than an upper light source unit installation angle formed by the upper light source unit and the light source unit installation surface of the case substrate. A pair of lower light source units, wherein the upper light source units intersect each other in the tunnel cross section to form a mountain-shaped cross-sectional shape An upper light source element pedestal having a pair of upper light source element arrangement surfaces constituting at least a part of the oblique lines, and a first upper light source element and a second upper light source element respectively arranged on the pair of upper light source element arrangement surfaces And the lower light source unit has a pair of lower light source element arrangement surfaces forming at least a part of a pair of oblique lines that intersect with each other in the tunnel cross section to form a mountain-shaped cross-sectional shape. A side light source element pedestal, and a first lower light source element and a second lower light source element respectively disposed on the pair of lower light source element arrangement surfaces, the first upper light source element and the second upper light source element. A semiconductor light emitting element in which a light source element, a first lower light source element, and a second lower light source element emit light source light, and the semiconductor light emitting element By and a condenser lens for capsule respectively, it is obtained by solving the problems described above.

  The invention according to claim 2 is the illumination device according to claim 1, wherein the upper light source unit installation angle connects the respective ends of the pair of upper light source element arrangement surfaces to each other within the tunnel cross section. The upper virtual connection line and the virtual angle reference line parallel to the light source unit installation surface, and the lower light source unit installation angle of each of the pair of lower light source element arrangement surfaces in the tunnel cross section The above-described problem is further solved by the intersection angle between the lower virtual connection line connecting the end portions of the two and the virtual angle reference line.

  The invention according to claim 3 is the illuminating device according to claim 1 or 2, wherein the light source has a concave shape that faces the upper light source unit from a position closer to the case substrate than the upper light source unit in the tunnel cross section. An upper light reflecting mirror having a reflecting surface; and a lower light reflecting mirror having a concave light reflecting surface facing the lower light source unit from a position closer to the case substrate than the lower light source unit in the tunnel cross section; A center line of the upper light reflecting mirror overlaps an intersection of the pair of upper light source element arrangement surfaces, and a center line of the lower light reflecting mirror extends along the light source unit installation surface. The above-described problem is further solved by being shifted from the intersection of the light source element arrangement surfaces toward the outside of the light emitting area.

The invention according to claim 4 is the lighting device according to claim 3, wherein the first upper light source element is arranged above the second upper light source element in the tunnel cross section,
The first lower light source element is disposed below the second lower light source element in the tunnel cross section, and passes through an intermediate point between the center line of the upper light reflecting mirror and the center line of the lower light reflecting mirror. The angle formed by the normal line orthogonal to the light source unit installation surface and the upper end connection line passing through the upper element end portion of the first upper light source element and the upper region end portion of the light emitting region is the normal line. And the lower end connecting line passing through the lower element end of the first lower light source element and the lower area end of the light emitting area further solves the above-described problem. Is.

The illumination device according to claim 1 of the present invention is installed on the wall surface of the tunnel in a state of being inclined to the road surface in a tunnel cross section that intersects the passage direction in the tunnel and irradiates the road surface with illumination light from a light emitting region. By doing so, the road surface can be illuminated.
The illumination device according to claim 1 of the present invention includes a light source unit storage case including a case substrate fixed to the wall surface, an upper light source unit installed on the case substrate, and the case below the upper light source unit. A lower light source unit installation angle is formed on the case substrate so as to form a lower light source unit installation angle that is larger than the upper light source unit installation angle formed by the upper light source unit and the light source unit installation surface of the case substrate. A pair of upper light source elements, wherein the upper light source unit forms at least part of a pair of diagonal lines that intersect with each other in the tunnel cross section to form a mountain-shaped cross-sectional shape An upper light source element pedestal having an arrangement surface and a first upper light source element arranged on each of the pair of upper light source element arrangement surfaces. And a second upper light source element, wherein the lower light source unit forms at least part of a pair of oblique lines that intersect each other in the tunnel cross section to form a mountain-shaped cross-sectional shape. A lower light source element pedestal having a side light source element arrangement surface, a first lower light source element and a second lower light source element respectively arranged on the pair of lower light source element arrangement surfaces, The first upper light source element, the second upper light source element, the first lower light source element, and the second lower light source element each have a semiconductor light emitting element that emits light source light and a condenser lens that includes the semiconductor light emitting element. Accordingly, the respective semiconductor light emitting elements of the first upper light source element, the second upper light source element, the first lower light source element, and the second lower light source element are provided. After condensing the light source light emitted from the element with each condenser lens, the illumination light should be irradiated to irradiate the road surface with the irradiation range shifted from each of the upper light source unit and the lower light source unit. It is possible to improve the illumination illuminance on the road surface and improve the uniformity by eliminating the illumination light irradiated to other than the road surface and avoid an increase in power consumption.

  And in addition to the effect which the illuminating device which concerns on Claim 1, there exists the illuminating device which concerns on this Claim 2, The said upper side light source unit installation angle is each of a pair of said upper side light source element arrangement | positioning surface within the said tunnel cross section. An intersection angle between an upper virtual connection line that interconnects end portions and a virtual angle reference line that is parallel to the light source unit installation surface, and the lower light source unit installation angle is a pair of lower sides in the tunnel cross section A virtual angle reference with each of the upper virtual connection line and the lower virtual connection line by being an intersection angle between the lower virtual connection line connecting the respective ends of the light source element arrangement surface and the virtual angle reference line In order to irradiate a wide range of illumination light on the road surface according to the angle of intersection with the line, it is ensured that there is no illumination light other than the road surface to which the illumination light is to be irradiated, improving the illumination illuminance on the road surface and leveling. It can be further avoid an increase in power consumption as well as further achieve an improvement in sexual.

  And in addition to the effect which the illuminating device which concerns on Claim 1 or Claim 2 show | plays, the illuminating device which concerns on this Claim 3 WHEREIN: The said upper side light source from the position near the said case board | substrate from the said upper side light source unit in the said tunnel cross section. An upper light reflecting mirror having a concave light reflecting surface facing the unit and a concave light reflecting surface facing the lower light source unit from a position closer to the case substrate than the lower light source unit in the tunnel cross section are formed. A lower light reflecting mirror, a center line of the upper light reflecting mirror overlaps an intersection of the pair of upper light source element arrangement surfaces, and a center line of the lower light reflecting mirror extends along the light source unit installation surface. The first upper light source element, the second upper light source element, and the first lower light are shifted from the intersection of the pair of lower light source element arrangement surfaces toward the outside of the light emitting region. Out of the light source light emitted from the respective semiconductor light emitting elements of the element and the second lower light source element, the light source light not directed to the light emission region is emitted from the respective light reflecting surfaces of the upper light reflecting mirror and the lower light reflecting mirror. Since it is reflected in the area and waste of light source light is avoided, it is possible to further increase the illumination illuminance on the road surface by avoiding an increase in power consumption.

  And in addition to the effect which the illuminating device which concerns on this claim 4, the illuminating device which concerns on this invention 4 WHEREIN: The said 1st upper side light source element is arrange | positioned above the said 2 upper side light source element in the said tunnel cross section, The first lower light source element is disposed below the second lower light source element in the tunnel cross section, and passes through an intermediate point between the center line of the upper light reflecting mirror and the center line of the lower light reflecting mirror. The angle formed by the normal line orthogonal to the light source unit installation surface and the upper end connection line passing through the upper element end portion of the first upper light source element and the upper region end portion of the light emitting region is the normal line. Smaller than the angle formed by the lower element end of the first lower light source element and the lower end connection line passing through the lower region end of the light emitting region, so that the first upper light source is relatively Eleme Since the light emission directions of the first lower light source element and the second lower light source element arranged at positions closer to the road surface than the second upper light source element and the second upper light source element are directed to the road surface, unnecessary light source light is eliminated. The illumination illuminance can be further improved.

The installation drawing of the illuminating device which concerns on one Example of this invention. FIG. 2 is a cross-sectional view of the tunnel as viewed from a direction intersecting the passing direction in FIG. 1. The perspective view which fractured | ruptured partially the illuminating device which concerns on one Example of this invention. The fracture | rupture top view of the illuminating device which concerns on one Example of this invention. FIG. 3 is a diagram illustrating how the lighting device according to an embodiment of the present invention is used. The top view which showed the arrangement | positioning state of the illuminating device which concerns on one Example of this invention. Sectional drawing of the illuminating device which concerns on one Example of this invention. The enlarged plan view of the illuminating device which concerns on one Example of this invention.

The illuminating device of the present invention is installed on the wall surface of the tunnel in a state inclined to the road surface in the tunnel cross section intersecting the direction of passage in the tunnel, and irradiates the road surface with illumination light from the light emitting region, A light source unit storage case including a case substrate fixed to a wall surface, an upper light source unit installed on the case substrate, and an upper light source unit and a light source of the case substrate installed on the case substrate below the upper light source unit A lower light source unit installed on the case substrate so as to form a lower light source unit installation angle that is larger than the upper light source unit installation angle formed by the unit installation surface, and the upper light source unit has a tunnel cross section A pair of upper light source elements that constitute at least part of a pair of diagonal lines that intersect each other to form a mountain-shaped cross-sectional shape. An upper light source element pedestal having a surface, and a first upper light source element and a second upper light source element respectively disposed on a pair of upper light source element arrangement surfaces. A lower light source element pedestal formed with a pair of lower light source element arrangement surfaces forming a ridge line of the mold, and a first lower light source element and a second lower side respectively arranged on the pair of lower light source element arrangement surfaces A first light source element, a second upper light source element, a first lower light source element, and a second lower light source element that emit light source light, and include the semiconductor light emitting element. Each having a condensing lens that eliminates illumination light other than the road surface to which the illumination light is to be irradiated, thereby reducing the direction of illumination illuminance on the road surface. And as long as it avoids the increase in power consumption while realizing an improvement in uniformity, manner of its specific implementation, may any be any one.
For example, in the illumination device of the present invention, all of the plurality of semiconductor light emitting elements may be arranged offset from the central axis of the condensing lens corresponding to each of the plurality of semiconductor light emitting elements.

The semiconductor light emitting element may be a self light emitting element such as an LED or an organic EL element made of an inorganic semiconductor material.
Further, the upper light source unit and the lower light source unit may be arranged directly on the light source unit arrangement surface of the case substrate, or may be arranged indirectly via a fixing member.
Further, the upper light source unit and the lower light source unit can be attached and exchanged by appropriately setting the arrangement angle with respect to the light source unit arrangement surface so as to improve the illuminance with respect to the road surface and make the distribution uniform.
Further, the light source light emitted from the semiconductor light emitting element may be condensed by a condenser lens and then diffused through a transparent cover including a light diffusing plate disposed in the light emitting region.
Note that “upper side” and “lower side” in the lighting device of the present invention mean “upper” and “lower” when the lighting device is attached to the wall surface of the tunnel.

In addition, the “intersection of the pair of upper light source element arrangement surfaces” and the “intersection of the pair of lower light source element arrangement surfaces” of the present invention are not limited to the state in which these arrangement surfaces actually intersect with each other. The virtual planes that extended the upper light source element arrangement planes of each other intersect each other in the tunnel cross section, and the virtual planes that extended the pair of lower light source element arrangement planes intersect each other in the tunnel cross section It is a concept that includes points.
Further, in the present invention, “the center line of the lower light reflecting mirror is shifted from the intersection of the pair of lower light source element arrangement surfaces along the light source unit installation surface toward the outside of the light emitting region”. This means that the center line of the side light reflecting mirror is shifted to a position close to the outside of the illumination device on the opposite side of the upper light source unit with respect to the lower light source unit.

An illumination device 100 according to an embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is an installation view of a lighting device according to an embodiment of the present invention, FIG. 2 is a tunnel cross-sectional view seen from a direction intersecting the passing direction of FIG. 1, and FIG. FIG. 4 is a partially cutaway perspective view of a lighting device according to an embodiment of the invention, FIG. 4 is a cutaway plan view of the lighting device according to an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. FIG. 6 is a plan view showing an arrangement state of the lighting device according to the embodiment of the present invention, and FIG. 7 is a lighting device according to the embodiment of the present invention. FIG. 8 is an enlarged plan view of a lighting apparatus according to an embodiment of the present invention.

First, as illustrated in FIG. 1 and FIG. 2, the illumination device 100 irradiates the illumination light L in the range of the light irradiation angle θ with respect to the road surface G in the tunnel T while being installed on the wall surface TW of the tunnel T. Is.
The light irradiation angle θ is the sum of angles θ1 and θ2 described later.

Next, a detailed configuration of the illumination device 100 will be described with reference to FIGS.
As shown in FIGS. 1 to 5, the lighting device 100 is installed on the wall surface TW of the tunnel T in a state of being inclined to the road surface G in the tunnel cross section that intersects the direction of passage in the tunnel T and from the light emitting region R. The road surface G is illuminated with illumination light L to illuminate the road surface G.

  The illumination device 100 according to the present embodiment includes a light source unit storage case 110 including a case substrate 111 fixed to a wall surface TW, an upper light source unit 120 installed on the case substrate 111, and a lower side of the upper light source unit 120. A lower light source unit installation angle γ2 that is installed on the case substrate 111 and is larger than the upper light source unit installation angle γ1 formed by the upper light source unit 120 and the light source unit installation surface 112 of the case substrate 111 is formed. And the lower light source unit 130 installed on the case substrate 111, and the upper light source unit 120 constitutes at least part of a pair of oblique lines that intersect with each other in the tunnel cross section to form a mountain-shaped cross-sectional shape. Upper light source element pedestal 12 having a pair of upper light source element arrangement surfaces 121A and 121B 1 and a first upper light source element 122A and a second upper light source element 122B arranged on a pair of upper light source element arrangement surfaces 121A and 121B, respectively, and the lower light source unit 130 intersects each other in the tunnel cross section And a pair of lower light source element pedestals 131 having a pair of lower light source element arrangement surfaces 131A and 131B that constitute at least a part of a pair of oblique lines forming a mountain-shaped cross section, and a pair of lower light source element arrangements The first lower light source element 132A and the second lower light source element 132B are disposed on the surfaces 131A and 131B, respectively. The first upper light source element 122A, the second upper light source element 122B, and the first lower light source element 132A. And the second lower light source element 132B emits the light source light. A, 122BA, 132AA, 132BA and condensing lenses 122AB, 122BB, 132AB, 132BB containing these semiconductor light emitting elements 122AA, 122BA, 132AA, 132BA, respectively, thereby providing the first upper light source element 122A, The light source light emitted from the respective semiconductor light emitting elements 122AA, 122BA, 132AA, and 132BA of the second upper light source element 122B, the first lower light source element 132A, and the second lower light source element 132B is converted into each condenser lens 122AB, 122BB, After condensing at 132AB and 132BB, the illumination range is shifted from each of the upper light source unit 120 and the lower light source unit 130 to irradiate the road surface G with the illumination light L. Therefore, the illumination device 100 is irradiated with the illumination light L. Power road G or later Is adapted to avoid an increase in power consumption while realizing an improvement and enhancement of the uniformity of the illumination intensity of the road surface G by eliminating the illumination light irradiated on.

The illumination device 100 emits illumination light L toward the road surface G from the light emission region R of the transparent plate-like member 160 installed in the opening of the light source unit storage case 110.
Moreover, the illuminating device 100 is attached to the wall surface TW in a state where the longitudinal direction DL is parallel to the direction of passage in the tunnel T.

  In the illumination device 100, the upper light source unit installation angle γ1 is such that the upper virtual connection line VL1 and the light source unit installation surface connecting the respective ends 121AA and 121BA of the pair of upper light source element arrangement surfaces 121A and 121B in the tunnel cross section. 112 is an intersection angle with a virtual angle reference line VL0 parallel to 112, and the lower light source unit installation angle γ2 mutually connects the ends 131AA and 131BA of the pair of lower light source element arrangement surfaces 131A and 131B in the tunnel cross section. Depending on the intersection angle between the upper virtual connection line VL1 and the lower virtual connection line VL2 and the virtual angle reference line VL0. In order to irradiate illumination light over a wide area of the road surface G, illumination light other than the road surface G to be illuminated is irradiated. The bright light is surely eliminated to further improve the illumination illuminance and uniformity of the road surface G, and further avoid an increase in power consumption.

  The illuminating device 100 includes an upper light reflecting mirror 140 having a concave light reflecting surface 141 facing the upper light source unit 120 from a position closer to the case substrate 111 than the upper light source unit 120 in the tunnel cross section, and a lower light source in the tunnel cross section. A lower light reflecting mirror 150 having a concave light reflecting surface 151 facing the lower light source unit 130 from a position closer to the case substrate 111 than the unit 130, and the center line CL1 of the upper light reflecting mirror 140 is a pair of upper The light emitting region R overlaps with the intersection of the light source element arrangement surfaces 121A and 121B, and the center line CL2 of the lower light reflecting mirror 150 extends from the intersection of the pair of lower light source element arrangement surfaces 131A and 131B along the light source unit installation surface 112. Is shifted to the outside of the first upper light source element 122A, the second upper light source element 122B, Of the light source light emitted from the respective semiconductor light emitting elements 122AA, 122AB, 132BA, 132BB of the lower light source element 132A and the second lower light source element 132B, the light source light not directed to the light emission region R is converted into the upper light reflecting mirror 140 and In order to avoid waste of light source light by being reflected by the respective light reflecting surfaces 141 and 151 of the lower light reflecting mirror 150 to avoid waste of light source light, it is possible to further improve the illumination illuminance on the road surface R by avoiding an increase in power consumption. It has come to be realized.

  In the lighting device 100, the first upper light source element 122A is disposed above the second upper light source element 122B in the tunnel cross section, and the first lower light source element 132A is lower than the second lower light source element 132B in the tunnel cross section. The first upper light source element and the normal line NL that are arranged on the side and pass through the intermediate point C between the center line CL1 of the upper light reflecting mirror 140 and the center line CL2 of the lower light reflecting mirror 150 and orthogonal to the light source unit installation surface 112 The angle θ1 formed by the upper element end 122AE of 122A and the upper end connection line EL1 passing through the upper region end RE1 of the light emitting region R is the normal line NL and the lower element end of the first lower light source element 132A. Is smaller than the angle θ2 formed by the lower end connection line EL2 passing through the portion 132AE and the lower region end RE2 of the light emitting region R. Accordingly, the light emission directions of the first lower light source element 132A and the second lower light source element 132B, which are disposed closer to the road surface G than the first upper light source element 122A and the second upper light source element 122B, respectively Therefore, it is possible to further improve the illumination illuminance on the road surface G by eliminating unnecessary light source light.

The angle θ1 is set to 25 ° to 45 ° and the angle θ2 is set to 75 ° to 85 ° under the condition that the angle δ between the lighting device 100 attached to the wall surface TW and the plane parallel to the road surface G is 45 °. In order to achieve this, the lens irradiation angles α of the condenser lenses 122AB, 122BB, 132AB, and 132BB are set to 25 ° to 40 °, and the upper light source element arrangement surfaces 121A and 121B and the lower light source element arrangement surfaces 131A and 131B, respectively. And the angle β formed by each of the upper virtual connection line VL1 and the lower virtual connection line VL2 is set to 10 ° to 20 °.
Thereby, the illuminating device 100 can set the angle (theta) which irradiates the illumination light L to 100 degrees thru | or 115 degrees.

Next, the irradiation range of the illumination light L when the illumination device 100 attached to the wall surface TW of the tunnel T is viewed in plan will be described with reference to FIGS.
As shown in FIG. 6, a plurality of lighting devices 100 are attached along the wall surfaces TW on both sides of the road surface G with an installation interval d of 20 m.
In addition, the lighting devices 100 attached to the respective wall surfaces TW on both sides of the road surface G are alternately installed on the wall surfaces TW at equal intervals along the direction of passage in the tunnel T.

As shown in FIGS. 6 to 8, when the light reflecting surfaces 141 and 151 described above form a quadratic curve in the tunnel cross section, the distance a from the upper light source unit 120 to the cover 160 is set to 50 to 200 mm. The shift amount b of the semiconductor light emitting elements 122AA and 122BA arranged at positions shifted from the lens centers of the condenser lenses 122AB and 122BB is set to 1.5 to 2 mm.
In addition, the lower light source unit 130 also has the same distance a and displacement amount b as the upper light source unit 120.
According to the illuminating device 100 having such a configuration, the illumination angle L of the illumination light L viewed in a plane is set to be larger than 113 °, and the illumination light L is irradiated with high illumination intensity and uniform illumination over a wide range of the road surface G. can do.

  As described above, the illumination device 100 according to the present embodiment includes the light source unit storage case 110, the upper light source unit 120, and the lower light source unit 130, and the upper light source unit 120 includes the upper light source element pedestal. 121, a first upper light source element 122A and a second upper light source element 122B. The lower light source unit 130 includes a lower light source element pedestal 131, a first lower light source element 132A, and a second lower light source. The first upper light source element 122A, the second upper light source element 122B, the first lower light source element 132A, and the second lower light source element 132B include semiconductor light emitting elements 122A, 122BA, 132AA, and 132BA. , Condenser lenses 122AB, 122BB, 132AB, 132BB By having each, the illumination light irradiated other than the road surface G which should be irradiated with the illumination light L is eliminated, thereby improving the illumination illuminance and uniformity of the road surface G and avoiding an increase in power consumption. The effect is enormous in that the device performance can be significantly higher than that of the conventional lighting device.

DESCRIPTION OF SYMBOLS 100 ... Illuminating device 110 ... Light source unit storage case 111 ... Case board 112 ... Light source unit arrangement surface 120 ... Upper light source unit 121A, 121B ... Upper light source element arrangement surface 122A ... First upper light source element 122B ... Second upper light source element 122AA, 122BA, 132AA, 132BA ... Semiconductor light emitting element 122AB, 122BB, 132AB, 132BB ... Condensing lens 122AE ... Upper element end part 130 Lower light source unit 131A, 131B ... Lower light source element arrangement surface 132A ... First lower light source element 132B ... Second lower light source element 132AE ... Lower element end 140 ...・ Upper light reflector 141, 1 DESCRIPTION OF SYMBOLS 1 ... Light reflecting surface 150 ... Lower side light reflecting mirror 160 ... Cover CL1 ... Center line of upper side light reflecting mirror CL2 ... Center line of lower side light reflecting mirror C ... Upper side light Intermediate point between the center line of the reflecting mirror and the center line of the lower light reflecting mirror DL ... Longitudinal direction of the illumination device EL1 ... Upper end connection line EL2 ... Lower end connection line G ... Road surface NL ... Normal line of light source unit installation surface R ... Light exit area RE1 ... Upper area end RE2 ... Lower area end T ... Tunnel TW ... Tunnel wall VL0 .. virtual angle reference line VL1... Upper virtual connection line VL2... Lower virtual connection line α... Lens irradiation angle β... Angle γ1 formed by each light source element arrangement surface and each virtual connection line ... Upper light source unit installation angle γ2 ... Lower light Unit installation angle [delta] · · · casing substrate and the angle θ1 formed by the plane parallel to the road surface, .theta.2 · · · angle theta · · · light irradiation angle

Claims (4)

An illumination device that is installed on a wall surface of the tunnel in a state of being inclined to a road surface in a tunnel cross section that intersects a traffic direction in the tunnel and that irradiates illumination light to the road surface from a light emission region,
A light source unit storage case including a case substrate fixed to the wall surface;
An upper light source unit installed on the case substrate;
The lower light source unit is installed on the case substrate below the upper light source unit and has an angle larger than the upper light source unit installation angle formed by the upper light source unit and the light source unit installation surface of the case substrate. A lower light source unit installed on the case substrate to form an angle,
An upper light source element pedestal having a pair of upper light source element arrangement surfaces that constitute at least part of a pair of oblique lines that intersect each other in the tunnel cross section to form a mountain-shaped cross-sectional shape; The first upper light source element and the second upper light source element respectively disposed on the pair of upper light source element arrangement surfaces,
For the lower light source element, the lower light source unit has a pair of lower light source element arrangement surfaces constituting at least a part of a pair of oblique lines that intersect with each other in the tunnel cross section to form a mountain-shaped cross-sectional shape A pedestal, and a first lower light source element and a second lower light source element respectively disposed on the pair of lower light source element arrangement surfaces,
The first upper light source element, the second upper light source element, the first lower light source element, and the second lower light source element each include a semiconductor light emitting element that emits light source light, and a condenser lens that includes the semiconductor light emitting element. A lighting device having each of them. The upper light source unit installation angle is an upper virtual connection line that connects the respective ends of the pair of upper light source element arrangement surfaces within the tunnel cross section, and a virtual angle reference line parallel to the light source unit installation surface. Intersection angle,
The lower light source unit installation angle is an intersection angle between a lower virtual connection line connecting the ends of the pair of lower light source element arrangement surfaces to each other in the tunnel cross section and the virtual angle reference line. The lighting device according to claim 1. An upper light reflecting mirror formed with a concave light reflecting surface facing the upper light source unit from a position closer to the case substrate than the upper light source unit in the tunnel cross section;
A lower light reflecting mirror formed with a concave light reflecting surface facing the lower light source unit from a position closer to the case substrate than the lower light source unit in the tunnel cross section,
The center line of the upper light reflecting mirror overlaps the intersection of the pair of upper light source element arrangement surfaces,
2. The center line of the lower light reflecting mirror is shifted from the intersection of the pair of lower light source element arrangement surfaces toward the outside of the light emitting area along the light source unit installation surface. Or the illuminating device of Claim 2. The first upper light source element is disposed above the second upper light source element in the tunnel cross section;
The first lower light source element is disposed below the second lower light source element in the tunnel cross section;
A normal line passing through a midpoint between the center line of the upper light reflecting mirror and the center line of the lower light reflecting mirror and orthogonal to the light source unit installation surface, the upper element end of the first upper light source element, and the light emission The angle formed by the upper end connection line passing through the upper region end of the region passes through the normal and the lower element end of the first lower light source element and the lower region end of the light emitting region. The lighting device according to claim 3, wherein the lighting device is smaller than an angle formed by the lower end connecting line.

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