JP2005203302A - Tunnel lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend disposition intervals of tunnel lighting systems, and to reduce the number of lights in the lighting system, which should be disposed in the inside of a tunnel. <P>SOLUTION: This tunnel lighting system 1 is provided with a lamp 16 disposed perpendicularly to the traffic direction of the tunnel 2, a reflector 15 integrally molded to a shape having a cup part 30 covering the lamp 16 to reflect light of the lamp 16 by the inside surface of the cup 30. A first side face 15a along the circumference direction of the lamp 16 in the cup part 30 is structured so that in order to form a light distribution shape in which a light flux having the maximum luminous intensity within a range of vertical angles of 40 degrees to 70 degrees, a plurality of reflecting walls 30a-30e to make reflecting light having mutually different vertical angles are formed so as to have shapes successively connected from the opening end 15d of the cup 30 to its bottom, and in the first side face 15a of the cup part 30, the reflecting wall 30a to make reflecting light having a vertical angle of 65 degrees which is smaller than the vertical angle of 70 degrees of the reflecting light to obtain the maximum luminous intensity is formed at the opening end 15d of the cup part 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an illuminating device installed inside a tunnel of an automobile road, and more particularly to a tunnel illuminating device suitable for use in a tunnel constructed in a mountainous area or the like with a relatively small amount of traffic.

  For tunnels, there are high-traffic tunnels such as highway tunnels and first-class national highway tunnels, as well as tunnels built in mountainous areas, etc., all the time of the day or temporarily. There is a low-traffic tunnel. All these tunnels are equipped with tunnel lighting equipment as lighting equipment for the purpose of ensuring traffic safety and smoothness under special conditions inside the tunnel, regardless of the traffic volume (for example, patents) Reference 1).

In general, an average road surface brightness L (cd / m ² ) and an arrangement interval (span) S (m) of tunnel illumination devices are defined as indices for a vehicle driver to travel safely in a tunnel. For example, when the design speed is 40 (km / h), in the case of a tunnel with a large amount of traffic, the average road surface brightness L ≧ 1.5 (cd / m ² ), and a tunnel with a relatively small amount of traffic (for example, one day In the case of a tunnel having a traffic volume of 10,000 or less), it is required to satisfy an average road surface luminance L ≧ 0.7 (cd / m ² ).

Further, the arrangement interval (span) S (m) of the tunnel illumination device is S / H ≦ in the one-side arrangement in which the tunnel illumination device is arranged only on one side wall surface inside the tunnel, where the mounting height is H (m). It is desirable to satisfy 1.5.
Japanese Patent Laid-Open No. 2003-21783

  However, if the number of lights of the tunnel lighting device per unit length installed in the tunnel is large, the cost required for installation and the cost required for maintenance after the tunnel lighting device is installed will increase. In particular, tunnels with low daily traffic will cost more per vehicle than tunnels with high traffic, so how to reduce the number of installed lights in such tunnels. Is an important issue.

  The present invention has been made in view of the above-described circumstances, and provides a tunnel lighting device that can extend the arrangement interval of tunnel lighting devices and can reduce the number of lamps of the tunnel lighting device to be arranged inside the tunnel. The purpose is to do.

  In order to achieve the above object, according to the present invention, there is provided a tunnel illumination device installed on a wall surface of a tunnel, wherein the lamp has a lamp disposed substantially perpendicular to the traffic direction of the tunnel and a cup portion covering the lamp. And a reflecting plate that reflects the light of the lamp, and the inner surface of the cup portion along the circumferential direction of the lamp has a maximum luminous intensity within a range of a vertical angle of 40 degrees to 70 degrees. A plurality of paraboloids that create reflected light of different vertical angles to form a light distribution shape in which are arranged are formed in a shape connected from the opening end to the bottom of the cup portion, and the vertical angle that should be the maximum luminous intensity A paraboloid that produces reflected light having a smaller vertical angle than reflected light is formed at the opening end of the cup portion.

  Further, the present invention provides a tunnel illuminating device installed on a wall surface of a tunnel, a lamp disposed substantially perpendicular to the traffic direction of the tunnel, a reflector that reflects light from the lamp, the lamp, and the reflection Of the light emitted toward the tunnel wall surface by the plate, a shielding plate is provided which shields light in the rear portion of the tunnel illumination device and in a high portion in the vertical direction.

  In the tunnel lighting device installed on the wall surface of the tunnel, the present invention is integrally formed in a shape having a lamp disposed substantially perpendicular to the traffic direction of the tunnel and a cup portion covering the lamp, And a shield that shields light in the rear part of the tunnel illuminating device and in a high part in the vertical direction out of the light irradiated toward the wall surface of the tunnel by the lamp and the reflector. Each of the inner surface along the circumferential direction of the lamp in the cup portion to form a light distribution shape in which a luminous flux having a maximum luminous intensity is disposed within a vertical angle range of 40 degrees to 70 degrees. A plurality of paraboloids that create reflected light of different vertical angles are formed in a shape that is connected from the opening end to the bottom of the cup part, and the reflection of a vertical angle smaller than the reflected light of the vertical angle that should be the maximum luminous intensity Parabolic making characterized by being formed on the open end of the cup portion.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to extend the arrangement | positioning space | interval of a tunnel illuminating device, maintaining the average road surface brightness at a favorable value, and it becomes possible to reduce the number of lamps of the tunnel illuminating device which should be arrange | positioned inside a tunnel.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing a configuration of a tunnel 2 in which a tunnel illumination device 1 according to the present embodiment is disposed, and FIG. 2 is a top view of the tunnel 2.

  As shown in FIG. 1, the tunnel 2 has a bowl-shaped cross section, and its wall surface is covered with concrete. A two-lane road 3 having a lane width of 3 M (meters) is provided on the bottom surface of the tunnel 2, and a road surface is formed on each road 3 with a road shoulder 4. As shown in FIGS. 1 and 2, the tunnel illumination device 1 is arranged at a predetermined arrangement interval (span) S only on one wall surface of the both wall surfaces of the tunnel 2 (so-called one-sided arrangement). These tunnel illumination devices 1 are installed at a height (mounting height H) of 4.5M to 5M (5M in the illustrated example) from the road surface (bottom surface) of the tunnel 2 at a mounting angle of 25 to 30 degrees (in the illustrated example). Further, the arrangement interval (span) S of each tunnel illumination device 1 is wider than that of the conventional one and is about 22.5 M (that is, the S / H ratio is about 4.5). ).

  Hereinafter, the tunnel illumination device 1 will be described in detail with reference to the drawings.

  FIG. 3 is a diagram illustrating a configuration of the tunnel illumination device 1, and FIG. 4 is a diagram illustrating a configuration of an illumination unit provided in the tunnel illumination device 1. FIG. 5 is a diagram schematically showing a cross section of the illumination unit, and FIG. 6 is a side view of the illumination unit. FIG. 7 shows an example of a light distribution diagram of the tunnel illumination device 1, and shows the light distribution of the tunnel illumination device 1 in a vertical plane (in the vertical plane) passing through the center O of the tunnel illumination device 1. FIG. In FIG. 7, the direction directly below the tunnel lighting device 1 is a vertical angle of 0 degrees, and the direction parallel to the traffic direction is a vertical angle of 90 degrees, and the solid line shown in FIG. 7 indicates light distribution at a predetermined horizontal angle.

  As shown in FIG. 3, the tunnel lighting device 1 includes a box-shaped case 10 extending in the traffic direction. The case 10 includes a case main body (not shown) that houses a lamp 16 and the like, which will be described later, and a lid 14 that is attached to the case main body by a hinge 12 so as to be opened and closed. On one side of the case main body, two hooks 13 that are hooked to the edge of the lid 14 and prohibit the opening of the lid 14 are attached. The case main body is provided with a waterproof rubber packing (not shown) at a location (opening edge) in contact with the lid 14 to prevent water or the like from entering inside. The case body is provided with four attachment pieces 11. When the case 10 is fixed to the wall surface of the tunnel 2, the lid 14 is directed to the road side, and the length direction of the case 10 is the traffic direction. It is applied to the wall so as to be substantially parallel, and a bolt or the like is applied to each of the mounting pieces 11 and fixed. A window frame 14 a is formed on the upper surface of the lid 14, and a translucent glass 19 is fitted into the window frame 14 a.

  An illuminating unit 20 having a lamp 16 as a light source and a reflecting plate 15 is disposed inside the case 10 on one side as viewed from the case center O, and illumination light emitted from the illuminating unit 20 passes through the translucent glass 19. It is irradiated toward the road surface. Further, on the other side of the case 10, a device such as a ballast for controlling the lighting of the lamp 16 is disposed.

  The lamp 16 includes an arc tube having a substantially cylindrical long axis K. For example, a 70 watt (W) high-pressure sodium lamp is used, and is mounted between a pair of sockets 21. Here, in the present embodiment, the lamp 16 is arranged in such a posture that its long axis K is substantially perpendicular to the traffic direction, and the amount of light traveling far away in the traffic direction and the anti-traffic direction is It is designed to increase compared to the case where the length direction is arranged parallel to the traffic direction.

  That is, as shown in the light distribution diagram of FIG. 7, the tunnel illuminating device 1 according to the present embodiment is substantially bilaterally symmetric about a vertical angle of 0 degrees, and the luminous flux having the maximum luminous intensity is a relatively large vertical angle. In the traffic direction and the anti-traffic direction of the tunnel 2, the range in which the tunnel illumination device 1 can irradiate is expanded, and the arrangement interval (span) S of the tunnel illumination device 1 is made larger than the conventional one. It is possible to widen (for example, S = about 22.5M).

However, in general, if the arrangement interval (span) S of the tunnel illumination device 1 is simply widened, the average road surface luminance L may be deteriorated. Therefore, in the present embodiment, when the design speed is 40 (km / h) while maintaining a wide span (for example, S / H = 4.5), the average road surface brightness L ≧ 0.7 (cd / m ² : candela per square meter).

Specifically, the inventor sets the light distribution of the tunnel illumination device 1 as a light distribution in which a luminous flux having the maximum luminous intensity is disposed within a vertical angle range of 40 degrees to 70 degrees, so that the S / H ratio = While maintaining 4.5, it has been determined through experiments and the like that an average road surface brightness L ≧ 0.7 (cd / m ² ) can be achieved at a design speed of 40 (km / h). At this time, since the tunnel illumination device 1 has a substantially symmetrical light distribution, the luminous flux having the maximum luminous intensity is also disposed within the vertical angle range of 290 to 320 degrees. In the present embodiment, the light distribution shape of the tunnel illumination device 1 is realized by the reflector 15. Hereinafter, the configuration of the reflecting plate 15 will be described in detail.

  As shown in FIGS. 3 to 6, the reflecting plate 15 is a metal plate (for example, an aluminum plate) having a predetermined reflectance with respect to the light of the lamp 16 so as to have a cup portion 30 that covers the lamp 16. It is formed by molding or the like. The cup portion 30 reflects the light of the lamp 16 on its inner side surface. When roughly divided, the first side surface 15 a formed along the circumferential direction of the lamp 16 and the major axis K of the lamp 16 intersect. A second side surface 15b and a third side surface 15c are formed. The second side surface 15b is arranged on the road side when the tunnel lighting device 1 is attached to the wall surface of the tunnel 2, and conversely, the third side surface is arranged on the wall surface side to direct the light of the lamp 16 toward the road. It is a reflective surface.

  The light distribution shape of the tunnel illumination device 1 is mainly formed by the first side surface 15a. Specifically, as shown in FIG. 5, the first side surface 15 a is symmetrical in the cross section perpendicular to the long axis K of the lamp 16 and has a plurality of reflecting walls 30-1 to 30-1 having different paraboloids. 30-8 (eight in the illustrated example) have a shape connected stepwise, and the light of the lamp 16 disposed inside the first side surface 15a is reflected by the reflecting walls 30-1 to 30-8. Each is reflected with a predetermined vertical angle.

  Here, as described above, in the present embodiment, the light distribution of the tunnel lighting device 1 is the first light distribution in which the luminous flux having the maximum luminous intensity is disposed within the range of the vertical angle of 40 degrees to 70 degrees. The lamp 16 is disposed in the side surface 15a as follows. That is, the direct light from the lamp 16 and the reflected light from the reflection walls 30-1 to 30-8 are larger in the amount of direct light, so that the direct light up to a vertical angle of 65 degrees can be irradiated. 16 is arranged. Specifically, when the opening radius of the first side surface 15a is n, the height from the opening surface 15e to the lamp 16 is h, and the maximum vertical angle of direct light is θ, h = n × Arctan θ (this embodiment) In this embodiment, the lamp 16 is disposed at a height that satisfies θ≈65 degrees. By arranging the lamp 16 in this way, direct light having a vertical angle θ or less is emitted from the opening of the reflector 15 toward the road surface.

  Further, light emitted from the lamp 16 at a vertical angle θ or more is reflected by the reflecting walls 30-1 to 30-8 of the first side surface 15a, and the paraboloids of the reflecting walls 30-1 to 30-8. The road surface is irradiated with a vertical angle defined by In the present embodiment, a reflection wall 30a that creates reflected light with a vertical angle of 65 degrees is formed at the opening end 15d so as to provide a light distribution in which a light beam having the maximum luminous intensity is disposed within a vertical angle range of 40 degrees to 70 degrees. Then, the reflecting wall 30b that produces the reflected light having a vertical angle of 70 degrees is connected to the reflecting wall 30a, and the reflecting walls 30c to 30f in which the vertical angles of the reflected light are sequentially reduced are sequentially connected to the reflecting wall 30b. ing.

  By the way, in order to extend the arrangement interval of the tunnel illumination device 1, it is advantageous to increase the vertical angle of the luminous flux having the maximum luminous intensity. That is, in order to extend the arrangement interval of the tunnel illumination device 1 while maintaining the average road surface brightness L at a good value, the reflection wall 30b that produces reflected light with a vertical angle of 70 degrees is used as the opening end 15d of the reflection plate 15. It is desirable to form.

  However, in the present embodiment, as described above, instead of the reflecting wall 30b that produces reflected light with a vertical angle of 70 degrees, the reflecting wall 30a that produces reflected light with a vertical angle of 65 degrees is intentionally formed at the opening end 15d. It is said.

  More specifically, when the reflecting wall 30a is formed at the opening end 15d and when the reflecting wall 30b is formed at the opening end 15d, the reflecting wall 30a is formed at the opening end 15d. The entry angle from the opening surface 15e to the reflecting wall is reduced, and the height m from the opening surface 15e to the bottom of the cup portion 30 can be reduced. Thereby, the metal mold | die at the time of integrally molding the said reflecting plate 15 by press molding etc. can be made compact.

  Moreover, in the tunnel lighting device 1 according to the present embodiment, the light / dark ratio on the wall surface caused by the lighting of the tunnel lighting device 1 is suppressed by adjusting the light directed to the wall surface behind the tunnel lighting device 1 and operated. The configuration is such that the flickering of the tunnel lighting device that a person feels while traveling is reduced, and no discomfort is given.

  Specifically, when the tunnel lighting device 1 is attached to a wall surface, the illuminance on the wall surface closer to the lamp 16 than the road surface is high, and the light / dark ratio between the adjacent tunnel lighting device 1 on the wall surface is high. Occurs. In particular, when the tunnel illumination device 1 is configured to irradiate light toward the far side in the traffic direction and the anti-traffic direction as in the present embodiment, the light / dark ratio on the wall surface tends to increase. Therefore, in the present embodiment, as shown in FIGS. 3 and 4, among the light traveling from the lamp 16 toward the wall surface, the light is shielded behind the tunnel illumination device 1 and in the vertical portion. The louver 17 is provided.

  FIG. 8 is a perspective view showing a configuration of the light shielding louver 17. The light shielding louver 17 is formed of a plate material whose surface is coated in black to prevent reflection, and is formed at a rod-like base portion 40 that crosses the cup portion 30 of the reflecting plate 15 and at both ends of the base portion 40. And a light shielding portion 43 that is bent substantially perpendicularly from the base portion 40. Each of the attachment portions 41 is formed with a hole 42 for fixing the attachment portion 41 to the reflection plate 15 with a screw or the like.

  On the other hand, as shown in FIGS. 3 and 4, the reflector 15 is provided with a fixing hole 18 for positioning and fixing the light shielding louver 17 around the opening of the cup portion 30, and the mounting portion 41 is fixed to the fixing hole. 18 is fixed by a screw or the like. A plurality of the fixing holes 18 are provided along the long axis K of the lamp 16 so that the mounting position of the light shielding louver 17 can be appropriately adjusted.

  As described above, the light shielding portion 43 shields light from the lamp 16 toward the wall surface. When the light shielding portion 43 is attached to the reflecting plate 15, the portion closest to the lamp 16, that is, the long axis K of the lamp 16. Is formed in a shape that draws a circular arc that becomes gradually narrower toward both ends, centering on a point P that intersects with. As described above, in the light shielding portion 43, by increasing the light shielding area at the place P where the distance from the lamp 16 is closest, the light flux having the maximum luminous intensity is effectively shielded from the light traveling from the lamp 16 toward the wall surface. can do.

  By providing such a light shielding louver 17, as shown in FIG. 9, a portion with high illuminance (indicated by hatching in the figure) irradiated on the wall surface when the light shielding louver 17 is not provided is effectively shielded. As shown in FIG. 5, the change in illuminance on the wall surface can be changed gently, and the light / dark ratio on the wall surface caused by the lighting of the tunnel illumination device 1 can be suppressed.

  Furthermore, in the present embodiment, the second side surface 15b of the cup portion 30 formed on the reflecting plate 15, that is, the surface that reflects the light of the lamp 16 toward the wall surface of the tunnel 2 is coated with, for example, black. Non-reflective processing is performed so as not to reflect 16 light, and the amount of light toward the wall surface behind the tunnel illumination device 1 is suppressed.

  That is, the tunnel illumination device 1 according to the present embodiment has a wall surface with a height of about 1M (meter) located approximately in the middle between two adjacent tunnel illumination devices 1 when the light intensity behind the device is “1”. That is, it has a light distribution in which the light intensity at a position corresponding to the height of the line of sight of the vehicle driver is 1.0 to 2.5 times the light intensity behind the apparatus, and flickers generated by the tunnel illumination device 1 Is effectively suppressed, and the discomfort given to the driver can be reduced.

As described above, according to the tunnel lighting device 1 of the present embodiment, the lamp 16 disposed substantially perpendicular to the traffic direction of the tunnel 2 and the cup 30 that covers the lamp 16 are integrally formed. And a reflecting plate 15 that reflects the light of the lamp 16 on the inner side surface of the cup portion 30, and the first side surface 15 a along the circumferential direction of the lamp 16 in the cup portion 30 has a vertical angle of 40 degrees to 70 degrees. A shape in which a plurality of reflecting walls 30a to 30e that create reflected light with different vertical angles are connected from the opening end 15d of the cup portion 30 to the bottom so as to form a light distribution shape in which a luminous flux having the maximum luminous intensity is arranged within the range of Since the average road surface luminance L is maintained at a good value (L ≧ 0.7 (cd / m ² )), light can be irradiated over a wide range in the traffic direction and the anti-traffic direction. Can, next door It is possible to increase the distance between the two tunnel illumination devices 1 in contact with each other. Therefore, the arrangement interval (span) of the tunnel illumination device 1 can be extended, and the number of lamps of the tunnel illumination device 1 to be arranged inside the tunnel can be reduced.

  Further, according to the tunnel illumination device 1 of the present embodiment, the first side surface 15a of the cup part 30 produces reflected light having a vertical angle of 65 degrees that is smaller than the reflected light having a vertical angle of 70 degrees that should be the maximum luminous intensity. Since the reflection wall 30a is formed at the opening end 15d of the cup portion 30, the height of the cup portion 30 can be suppressed and the size can be reduced.

  Furthermore, according to the tunnel illumination device 1 of the present embodiment, out of the light emitted toward the wall surface of the tunnel 2 by the lamp 16 and the reflection plate 15, it is behind the tunnel illumination device 1 and in the vertical direction. Since the configuration includes the shielding louver 17 that shields light of a high part, the change in illuminance on the wall surface can be changed gently, and the light / dark ratio on the wall surface caused by the lighting of the tunnel illumination device 1 can be suppressed. It becomes.

  Further, according to the tunnel illumination device 1 of the present embodiment having an attachment angle of 30 degrees, when the luminous intensity behind the device is “1”, the tunnel illumination device 1 is positioned approximately in the middle of the two adjacent tunnel illumination devices 1. The flicker generated by the tunnel lighting device 1 is effective because the light intensity on the wall surface of about 1 meter in height has a light distribution shape that is 1.0 to 2.5 times the light intensity behind the device. It is possible to reduce the discomfort given to the driver.

The above-described embodiment shows one aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
(1) In the above-described embodiment, the light distribution of the tunnel lighting device 1 is added to the light distribution shape described in the above-described embodiment, and further, as follows, so that the total uniformity U0, the lane axis Any or all of the uniformity UL and the glare (IT value) can be made good values.

  FIG. 11 is a diagram illustrating an example of the light distribution of the tunnel illumination device 1 according to this modification, and is a diagram illustrating the light distribution in a horizontal plane.

  In this figure, the luminous intensity of a light beam arranged within a horizontal angle range of 20 degrees to 60 degrees and a vertical angle range of 10 degrees to 30 degrees (indicated by the hatched area A) is 150 to 300 (cd / 1000 lm). By using the light distribution shape as described above, it is possible to achieve the overall uniformity U0 ≧ 0.4.

Here, the total uniformity U0 is defined by the ratio of the average illuminance on the road surface to the minimum illuminance, and is used as an indicator of unevenness in brightness in the traffic direction. That is, the closer the value of the total uniformity U0 is to “1”, the more uneven the brightness is, and generally, the total uniformity U0 ≧ 0.4 is calculated. Even in the present modification, the tunnel illumination device 1 has the light distribution shape as described above, so that the S / H ratio = 4.5 and the average road surface brightness L ≧ 0.7 (cd / m ² ). It is possible to achieve the overall uniformity U0 ≧ 0.4 while maintaining.

In addition, in FIG. 11, the light distribution of the tunnel lighting device 1 is added to the light distribution shape described in the above embodiment, and further, the horizontal angle is 75 ° to 85 ° and the vertical angle is 35 ° to 65 °. By making the luminous intensity distribution of the luminous flux arranged within the range (indicated by the hatched area B) 150 (cd / 1000 lm) or more, S / H ratio = 4.5 and average road surface brightness L ≧ While maintaining 0.7 (cd / m ² ), the lane axis uniformity UL indicating the uniformity on the lane axis can be set to a good value. Specifically, the inventors have such a light distribution shape, so that the lane axis uniformity UL on the side where the tunnel illumination device 1 is arranged is used as the lane axis uniformity UL on the one side arrangement. It is experimentally determined that the lane axis uniformity UL on the side where the lighting device 1 is not disposed can be about 0.4 or more.

Further, the luminous intensity of the light beam arranged in the range of the shaded area B, that is, the horizontal angle of 75 to 85 degrees and the vertical angle of 35 to 65 degrees is set to 450 (cd / 1000 lm) or less. By adopting a light distribution shape, glare (TI value) can be suppressed to 15% or less while maintaining S / H ratio = 4.5 and average road surface brightness L ≧ 0.7 (cd / m ² ). It is. Here, the glare indicates an index of glare. Therefore, as described above, a light distribution shape in which the luminous intensity of a light beam arranged in a range of a horizontal angle of 75 to 85 degrees and a vertical angle of 35 to 65 degrees is 450 (cd / 1000 lm) or less. By doing so, it becomes possible to suppress the difference in brightness between the vicinity immediately below the tunnel illumination device 1 and the adjacent tunnel illumination device 1 and reduce glare.

By controlling the light intensity within each of the hatched area A and the hatched area B as described above, S / H ratio = 4.5 and average road surface brightness L ≧ 0.7 (cd / m ² ) While maintaining the above, it is possible to make all the values of the total uniformity U0, the lane axis uniformity UL, and the glare (TI value) favorable.
(2) Further, in the above-described embodiment, the one-sided arrangement in which the tunnel illumination device 1 is arranged only on one side of both wall surfaces in the tunnel is illustrated, but the present invention is not limited to this, and a staggered arrangement or a facing arrangement may be used.

It is sectional drawing of the tunnel by which the tunnel illuminating device concerning embodiment of this invention is arrange | positioned. It is a top view of the said tunnel. It is a top view which shows the structure of the said tunnel illuminating device. It is a perspective view which shows the structure of an irradiation part. It is sectional drawing of a cup part. It is a side view of a cup part. It is a figure which shows an example of the light distribution in the vertical plane of the said tunnel illuminating device. It is a perspective view which shows the structure of a light shielding louver. It is a figure which shows an example of the illumination intensity distribution in the wall surface when the light-shielding louver is not attached. It is a figure which shows an example of the illumination intensity distribution in the wall surface when a light shielding louver is attached. It is a figure which shows an example of the light distribution in the horizontal surface of the said tunnel illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tunnel illumination apparatus 2 Tunnel 3 Road 4 Shoulder 15a 1st side surface 15b 2nd side surface 15c 3rd side surface 15d Open end 16 Lamp 17 Light-shielding louver 20 Illumination part 30 Cup part 30-1-30-30 Reflection wall K Long axis

Claims (3)

In the tunnel lighting device installed on the wall of the tunnel,
A lamp arranged substantially perpendicular to the traffic direction of the tunnel;
A reflection plate that is integrally molded into a shape having a cup portion that covers the lamp and reflects the light of the lamp;
Reflected light of different vertical angles so as to form a light distribution shape in which the luminous flux having the maximum luminous intensity is arranged in the range of 40 to 70 degrees on the inner side surface along the circumferential direction of the lamp in the cup portion. A plurality of paraboloids that form a contiguous shape from the opening end to the bottom of the cup portion, and a parabolic surface that produces reflected light having a vertical angle smaller than the reflected light having a vertical angle that should be the maximum luminous intensity. A tunnel illuminator characterized by being formed at the open end of the part. In the tunnel lighting device installed on the wall of the tunnel,
A lamp arranged substantially perpendicular to the traffic direction of the tunnel;
A reflector that reflects the light of the lamp;
A shielding plate that shields light in the vertical direction at the rear of the tunnel illumination device out of the light emitted toward the tunnel wall by the lamp and the reflection plate, Tunnel lighting device. In the tunnel lighting device installed on the wall of the tunnel,
A lamp arranged substantially perpendicular to the traffic direction of the tunnel;
A reflector plate that is integrally molded into a shape having a cup portion that covers the lamp, and reflects the light of the lamp;
Among the light irradiated toward the wall surface of the tunnel by the lamp and the reflecting plate, a shielding plate that shields the light in the rear portion of the tunnel illumination device and in the vertical direction,
Reflected lights of different vertical angles so as to form a light distribution shape in which the luminous flux having the maximum luminous intensity is disposed in the range of 40 to 70 degrees on the inner side surface of the cup portion along the circumferential direction of the lamp. A plurality of paraboloids that form a contiguous shape from the opening end to the bottom of the cup portion, and a parabolic surface that produces reflected light having a vertical angle smaller than the reflected light having a vertical angle that should be the maximum luminous intensity. A tunnel illuminator characterized by being formed at the open end of the part.

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