JP2000348504A - Luminaire for tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire for tunnel, capable of lessening restrictions on effective internal height of the tunnel. SOLUTION: A luminaire for tunnel includes a body 1, equipped internally with a light source 3, a reflecting mirror 2 having a paraboloid arranged so that the light source 3 lies approx. at the focus, and a lighting device 4 to light up the light source 3, and installed on the inner surface of the tunnel in an arrangement such that the reflecting mirror 2 is positioned confronting an opening for light transmission 7 in the undersurface of the body 1 and the opening 7 is covered with a phototransmissive panel 5. The reflection mirror 2 is arranged so that its optical axis 10 intersects the panel 5 at an acute angle, the sides with oversurface 11 and undersurface 2 relative to the optical axis 10 being longer and shorter, respectively, in the axial directions, and that the optical axis 10 is installed so as to be directed in the vehicle advancing direction A inside the tunnel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lighting device for a tunnel.

[0002]

2. Description of the Related Art Conventionally, a propellant beam is emitted by illuminating the inside of a tunnel with a projector, that is, a driver traveling while following a preceding vehicle is irradiated with light in a traveling direction to illuminate the back of the preceding vehicle to illuminate the preceding vehicle. It was thought to improve the visibility of.

[0003]

However, when light is projected in the direction of the driver's line of sight by a light projector, an appropriate light distribution cannot be obtained. In addition, the height of the device, that is, the thickness of the device increases,
There is a restriction on the effective height in the tunnel. There were also problems such as the inability to perform automatic cleaning.

Accordingly, it is an object of the present invention to provide a tunnel lighting fixture capable of reducing restrictions on the effective height in a tunnel.

[0005]

According to a first aspect of the present invention, there is provided a lighting device for a tunnel, comprising: a light source; a reflecting mirror having a paraboloid disposed so that the light source is substantially at a focal position; A lighting device for a tunnel having a lighting device in a fixture main body, the reflecting mirror facing a translucent opening on a lower surface of the fixture main body, and covering the translucent opening with a translucent panel and being installed on an inner surface of a tunnel. In the above, the reflecting mirror is arranged so that an optical axis thereof intersects the translucent panel at an acute angle, and the upper surface side is longer in the optical axis direction and the lower surface side is shorter in the optical axis direction with respect to the optical axis. Wherein the device main body is installed in the tunnel such that the optical axis is oriented in the vehicle traveling direction in the tunnel.

According to the first aspect of the present invention, since the light of the light source is reflected by the reflecting mirror in the direction of the optical axis, that is, in the traveling direction of the vehicle, a professional beam is possible. Moreover, the restriction on the effective height in the tunnel is reduced as compared with the conventional example, and appropriate light distribution is easily obtained.

According to a second aspect of the present invention, in the tunnel lighting device according to the first aspect, the lighting device is disposed on a side opposite to the light source with the reflecting mirror interposed therebetween, and the translucent panel is a flat panel. It is.

According to the illumination device for a tunnel according to the second aspect, in addition to the same effects as those of the first aspect, the light source and the lighting device are arranged facing each other in the fixture body, so that the heat of the light source can be applied to the lighting device. The influence can be minimized and the size of the device can be reduced. By adopting a flat panel as the translucent panel, it is possible to cope with automatic cleaning.

According to a third aspect of the present invention, there is provided a tunnel lighting device according to the first or second aspect, wherein the reflecting mirror is provided with a line-of-sight guiding reflecting surface facing the entrance of the vehicle.

According to the third aspect of the present invention, in addition to the same effects as those of the first and second aspects, the light reflected by the line-of-sight guiding mirror is recognized by the driver, and the roadway in the tunnel is provided. A gaze guidance effect is obtained in which the shape of the vehicle is easy to understand and driving is easy.

According to a fourth aspect of the present invention, in the tunnel lighting device according to the third aspect, the line-of-sight guiding reflecting surface is provided near a tip of the reflecting mirror on the upper surface side with respect to the optical axis.

According to the tunnel lighting device of the fourth aspect, the same effect as that of the third aspect is obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In other words, this tunnel lighting device includes a light source 3, a reflecting mirror 2 having a parabolic surface arranged such that the light source 3 is substantially at a focal position, and a lighting device for lighting the light source 3 in FIGS. 1 and 2. The device 4 is provided in the instrument body 1. The appliance body 1 is, for example, a box-shaped lower surface opening made of a stainless steel plate, and a lid 13 is attached to the lower surface opening via a hinge 17. 14 is a latch of the lid 13, 15 is a main body mounting portion, and 16 is a cable gland.

The reflecting mirror 2 has a light-transmitting opening 7 on the lower surface of the instrument body 1.
And the light transmitting opening 7 is covered with the light transmitting panel 5 and installed on the inner surface of the tunnel 9. The light-transmitting opening is formed in the lid 13 and the light-transmitting panel 5 is provided. The translucent panel 5 is a flat panel using, for example, tempered glass.

The reflecting mirror 2 is arranged in the apparatus main body 1 so that the optical axis 10 intersects the light transmitting panel 8 at an acute angle, and is cut asymmetrically with respect to the optical axis 10. That is, the upper surface 11 is formed longer in the direction of the optical axis 10 and the lower surface 12 is formed shorter in the optical axis direction, and is made of, for example, an aluminum plate. The instrument body 1 is installed in the tunnel 9 so that the optical axis 10 faces the vehicle traveling direction A in the tunnel 9. The reflecting surface 2 for guiding the line of sight directed toward the entrance of the vehicle is provided on the reflecting mirror 2 with respect to the optical axis 10 of the reflecting mirror 2.
It is provided near the front end on one side. L is light in the traveling direction of the direct light and the reflected light of the light source 3. Lb is light reflected by the line-of-sight guidance reflecting surface 6, and is in the opposite direction to the light L.

The lighting device 4 includes a light source 10 with the reflecting mirror 2 interposed therebetween.
And are located on the opposite side. In the embodiment, the instrument body 1
The light source 3 is arranged on one side, and the lighting device 4 is arranged on the other side.

FIG. 3 shows a traveling state of the cars 19 and 20 in the tunnel. Since the light L is emitted in the traveling direction A of the cars 19 and 20, the light L is directed to the rear surface of the preceding car 20 or directly to the ground. It can be seen that the light is reflected and illuminated to enhance the visibility of the following vehicle 19.

FIG. 4 shows the installation positions of the tool bodies 1a and 1b. The tool body 1a is the entrance lighting (pro beam) of the tunnel 9, and the tool body 1b is the exit lighting (pro beam) of the tunnel 9.

According to the first embodiment, since the light from the light source 3 is reflected by the reflecting mirror 2 in the optical axis direction, that is, in the vehicle traveling direction A, a professional beam is possible. In addition, the restriction on the effective height in the tunnel 9 can be reduced as compared with the conventional example, and appropriate light distribution can be easily obtained.

By arranging the light source 3 and the lighting device 4 facing each other in the main body 1, the influence of the heat of the light source 3 on the lighting device 4 can be minimized, and the size of the equipment can be reduced. By adopting a flat panel as the translucent panel 5, it is possible to cope with automatic cleaning.

The light reflected by the line-of-sight guiding mirror 6 is recognized by the driver, and a line-of-sight guiding effect is obtained in which the shape of the roadway in the tunnel 9 is easy to understand and driving is easy.

A second embodiment of the present invention will be described with reference to FIG. That is, this tunnel lighting device is
In this embodiment, the gaze guiding reflection surface 4 is not provided, and the other configuration is the same as that of the first embodiment.

[0023]

According to the illumination device for a tunnel according to the first aspect, the light of the light source is reflected by the reflecting mirror in the optical axis direction, that is, in the traveling direction of the vehicle, so that a professional beam is possible. Moreover, the restriction on the effective height in the tunnel is reduced as compared with the conventional example, and appropriate light distribution is easily obtained.

According to the lighting device for a tunnel according to the second aspect, in addition to the same effect as in the first aspect, the light source and the lighting device are arranged opposite to each other in the fixture body, so that the heat of the light source can be applied to the lighting device. The influence can be minimized and the size of the device can be reduced. By adopting a flat panel as the translucent panel, it is possible to cope with automatic cleaning.

According to the third aspect of the present invention, in addition to the same effects as those of the first and second aspects, the light reflected by the gaze-guiding reflector is recognized by the driver, and the roadway in the tunnel is recognized. A gaze guidance effect is obtained in which the shape of the vehicle is easy to understand and driving is easy.

According to the tunnel lighting device of the fourth aspect, the same effect as that of the third aspect is obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a first embodiment of the present invention.

FIG. 2 is a front view of the front of the lighting fixture.

FIG. 3 is a longitudinal sectional view of a tunnel.

FIG. 4 is a cross-sectional view of a tunnel.

FIG. 5 is a sectional view of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Reflector 3 Light source 4 Lighting device 5 Translucent panel 6 Reflection surface for gaze guidance 7 Translucent aperture 10 Optical axis

Claims (4)

[Claims] 1. A light source, a reflector having a paraboloid disposed so that the light source is substantially at a focal position, and a lighting device for lighting the light source are provided in a fixture main body. In a tunnel lighting fixture installed on an inner surface of a tunnel, which faces a light-transmitting opening on a lower surface of the device main body, covers the light-transmitting opening with a light-transmitting panel, an optical axis of the reflecting mirror is the light-transmitting panel. And an upper surface side is formed longer in the optical axis direction with respect to the optical axis, and a lower surface side is formed shorter in the optical axis direction with respect to the optical axis. The lighting device for a tunnel, wherein the device body is installed in the tunnel so as to face a traveling direction. 2. The lighting device for a tunnel according to claim 1, wherein the lighting device is disposed on a side opposite to the light source with the reflecting mirror therebetween, and the translucent panel is a flat panel. 3. The lighting device for a tunnel according to claim 1, wherein the reflecting mirror is provided with a gaze-guiding reflecting surface facing the entrance of the vehicle. 4. A reflecting surface for guiding the line of sight is provided near a tip of the upper surface side of the reflecting mirror with respect to the optical axis.
The lighting equipment for a tunnel as described.