JP2011100586A - Lighting system for tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system for tunnel, which can appropriately treat heat generated as a loss in a solid-state light-emitting element. <P>SOLUTION: The lighting system for tunnel includes: a frame 3 which has a plurality of solid-state light-emitting elements 4 fixed in a row on the side face of a long plate member having an installation part 8 at the lower part; wiring which supplies power to the solid-state light-emitting elements 4 from a power source; a reflecting plate 5 which has a reflective surface 12 inside to fix the installation part 8 of the frame 3; a case 2 which fixes and houses in its interior the reflective surface 12 of the reflecting plate 5 toward the opening part direction; and a translucent cover 6 which closes the opening part of the case 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tunnel illumination device used for illumination in a tunnel using a solid light emitting element as a light source.

  As a tunnel lighting device, as disclosed in Patent Document 1, conventionally, a lighting device using a fluorescent lamp as a light source has been mainly used. However, the fluorescent lamp may suddenly run out, and in such a case, it is necessary to perform maintenance for replacing the lamp.

  As a new light source for solving the above problems, solid-state light-emitting elements, particularly light-emitting diodes (hereinafter referred to as “LEDs”) are attracting attention. Unlike a fluorescent lamp, an LED does not cause a sudden blowout, as well as a long life. Therefore, the tunnel illumination device has an advantage that the maintenance is not required when the LED is used as the light source.

  By the way, when using LED as a light source, the process of the heat | fever generate | occur | produced as loss from it becomes important. If the heat treatment is not sufficiently performed, problems such as shortening the life of the LED occur. In patent document 2, in order to process the heat | fever generate | occur | produced as loss from LED, attaching a fin to LED is proposed.

JP 2009-16259 A JP 2009-245621 A

  However, the tunnel illumination device needs to be a waterproof type in order to protect the LEDs and the like from water leakage in the tunnel. That is, in the tunnel lighting device, LEDs are arranged in a sealed space. Therefore, even if the fin is attached to the LED as disclosed in Patent Document 2, the heat generated as a loss in the LED cannot be discharged outside the sealed space. That is, the method disclosed in Patent Document 2 cannot appropriately treat the heat.

  The present invention has been made for the purpose of solving the above-described problems, and provides a tunnel lighting device capable of appropriately processing heat generated as a loss in a solid state light emitting device. .

  In order to achieve the above object, a tunnel illumination device according to claim 1 is a frame in which a plurality of solid light emitting elements are arranged and fixed on the side of a long plate member having a mounting portion below, and a power source is connected to the solid light emitting element. A wiring for supplying electric power, a reflecting plate having a reflecting surface for fixing the mounting portion of the frame on the inside, a case for fixing and storing the reflecting surface of the reflecting plate in the direction of the opening, And a translucent cover that seals the opening of the case.

  The tunnel illumination device according to claim 2 is characterized in that the frame and the reflection plate are made of metal.

  Further, in the tunnel illumination device according to claim 3, in the cross section orthogonal to the longitudinal direction of the frame, the reflection surface is configured as a parabola shape, and the solid-state light emitting element is a parabola shape which is the reflection surface. It is characterized by being arranged at the focal point.

  In the tunnel illumination device according to the first aspect, the attachment portion of the frame in which the plurality of solid state light emitting elements are arranged and fixed is fixed to the reflection surface of the reflection plate. The reflector is fixedly housed in the case. Thereby, the heat generated as a loss in the solid state light emitting device can be transferred to the case via the frame and the reflection plate, and can be discharged to the outside from the case. Further, even if the heat accumulates in the reflector due to the heat capacity of the reflector, the temperature rise is suppressed, so that the temperature of the solid state light emitting device connected to the reflector via the frame is also increased. It can be suppressed. As described above, in the tunnel lighting device, heat generated as a loss in the solid light emitting element can be appropriately processed, and the solid light emitting element can be prevented from being adversely affected by the heat.

  The tunnel illumination device according to claim 2, wherein the frame and the reflection plate are made of metal, so that heat generated as a loss in the solid-state light emitting element can be quickly passed through the frame. Can diffuse. Thereby, it is possible to prevent the heat from being accumulated around the solid state light emitting device.

  In the illumination device for a tunnel according to claim 3, the light emitted from the solid-state light emitting element is converted into parallel light by the reflecting surface having a parabolic shape and used for illumination. Thereby, the illumination device for tunnel can suppress the diffusion of the light emitted from the solid state light emitting element, and can illuminate the illumination area brightly.

The perspective view of the illuminating device for tunnels of embodiment of this invention. The front view of the illuminating device for tunnels seen from the A direction of FIG. The perspective view explaining attachment of the solid light emitting element, a pipe, and a terminal part to a frame. FIG. 6 is an enlarged perspective view for explaining attachment of the reflection surface of the reflector and the attachment portion of the frame, omitting the case and the base portion. The expanded sectional view in the BB surface of FIG. The expanded sectional view in the CC plane of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The tunnel illumination device 1 of the present invention (hereinafter simply referred to as “illumination device 1”) includes a case 2, a frame 3, a solid light emitting element 4, a reflector 5, and the like. The lighting device 1 is a lighting device that can appropriately process heat generated as a loss in the solid state light emitting device 4 and exhibit excellent characteristics such as long life of the solid state light emitting device 4.

  As shown in FIGS. 1 and 2, the illuminating device 1 has a box-shaped case 2 having an opening 2a in one direction, and the case 2 extends from the solid light emitting element 4 in the direction of the opening 2a. The emitted light is emitted and illumination is performed. In the case 2, components such as the frame 3, the solid state light emitting element 4, and the reflection plate 5 are disposed. Moreover, the opening part 2a of the case 2 is sealed with the cover 6 which has translucency, as shown to FIG. Case 2 is made of resin, metal or the like, and cover 6 is made of a waterproof material such as resin or glass. Between the case 2 and cover 6, an unillustrated packing is inserted. Yes. Therefore, the internal space 7 constituted by the case 2 and the cover 6 is in a hermetically sealed state, preventing water from entering. In addition, in the illustrated lighting device 1, two frames 3 are provided, but one frame 3 may be provided, or three or more frames 3 may be provided.

  The frame 3 is made of a material having excellent thermal conductivity such as metal (for example, aluminum), and is made of a long plate as shown in FIG. Further, the frame 3 is provided with an attachment portion 8 for attachment to the reflecting plate 5 projecting in the lateral direction below the frame 3. First, a plurality of solid state light emitting devices 4 arranged in a line on the left and right side surfaces along the longitudinal direction are fixed to the frame 3 via a substrate for electronic wiring (not shown). Further, on the outer side of the frame 3, along the longitudinal direction thereof, there is translucency, and for protecting the solid light emitting element 4 provided with a notch in one direction in order to avoid interference with the mounting portion 8. The pipe 11 is inserted by sliding from the end direction of the frame 3. After the protective pipe 11 is inserted, the frame 3 can be inserted into and removed from the base 9 provided opposite to the inside of the case 2 at both ends in the longitudinal direction. The terminal portion 10 having the wired terminal pins 10a is attached. Since the base 9 is wired from a power source (not shown), the terminal pin 10a is inserted into the base 9 so that the solid state light emitting device 4 is supplied with power from the power source. It becomes possible.

  The solid-state light-emitting element 4 is an LED, an electroluminescence, or the like, and is particularly preferably configured as an LED. This is because the LED has a long life compared to a fluorescent lamp or the like, does not generate a break due to sudden, and the luminous efficiency is comparable to that of a fluorescent lamp.

  The reflection plate 5 is made of a material (for example, aluminum) that has good thermal conductivity such as metal and that can efficiently reflect light emitted from the solid state light emitting device 4, and is disposed throughout the internal space 7. Further, as shown in FIGS. 4 to 6, the reflecting plate 5 is provided with a reflecting surface 12 having a mirror finish inside.

  Here, in the frame 3 in which the solid light emitting element 4, the terminal portion 10, and the pipe 11 are attached, the terminal pin 10 a of the attached terminal portion 10 is inserted into the base portion 9. Thereafter, the integrated mounting portion 8 of the frame 3 is connected to the inner apex portion of the reflecting surface 12 by screws, rivets 8a, and the like along the longitudinal direction of each other. Further, the reflecting plate 5 is attached to the case 2 using the screws 5 and the rivets 5b, etc., with the legs 5a included in the reflecting plate 5 in the state where the reflecting surface 12 faces the opening of the case 2.

  Further, the reflecting surface 12 of the reflecting plate 5 has a parabolic shape in cross section perpendicular to the longitudinal direction of the frame 3 (illuminating device 1), and the solid light emitting element 4 is disposed at the parabolic focus. (See FIG. 5). With this configuration, the light emitted from the solid state light emitting device 4 is converted into parallel light and emitted from the opening 2a, and used for illumination.

  The heat generated as a loss in the solid light emitting element 4 in the present lighting device 1 configured as described above is because the solid light emitting element 4 and the case 2 and the cover 6 are connected by the air in the internal space 7. Although heat is transferred through the air, heat transfer from the solid light emitting element 4 to the case 2 and the cover 6 through the air is not efficiently performed because the heat conductivity of the air is low.

  Therefore, in the present lighting device 1, first, the solid light emitting element 4 is placed on the frame 3 made of a material having excellent thermal conductivity such as metal via a thin substrate (not shown) (for example, thickness 1 mm). It is fixed. Thereby, the heat is quickly diffused into the frame 3. Moreover, in this illuminating device 1, the attaching part 8 of the flame | frame 3 is being fixed to the reflective surface 12 of the reflecting plate 5 along a mutual longitudinal direction. That is, since the attachment portion 8 of the frame 3 and the reflection surface 12 of the reflection plate 5 are fixed over a wide area, heat can be efficiently transferred from the frame 3 to the reflection plate 5 (reflection surface 12). Moreover, since the reflecting plate 5 is made of a material having excellent thermal conductivity such as metal like the frame 3, the heat is quickly diffused to both the reflecting plate 5 and the connection. In addition, in the lighting device 1, since the reflector 5 is fixed to the case 2 to which the cover 6 is attached, the heat is prevented from being accumulated in the vicinity of the solid light emitting element 4, Heat can be efficiently transferred to the case 2 and the cover 6 via the substrate, the frame 3, and the reflection plate 5, and discharged to the outside of the internal space 7.

  By the way, the cover 6 is made of a material having low thermal conductivity such as a resin, and the case 2 may also be made of a material having low thermal conductivity such as a resin. In such a case, as described above, even if the path for transferring the heat to the case 2 and the cover 6 is constituted by the substrate, the frame 3, and the reflector 5, The conduction speed is suppressed, and the heat is not smoothly discharged to the outside of the internal space 7. Therefore, in such a case, the temperature of the solid state light emitting device 4 may be increased. However, this problem is also solved by the above configuration in the lighting device 1.

  Specifically, as shown in FIG. 2, the reflecting plate 5 is disposed over the entire interior space 7, and its volume is larger than that of the frame 3, so that it has a large heat capacity. is doing. Therefore, even when the discharge from the case 2 and the cover 6 to the outside of the internal space 7 is not smoothly performed, that is, when the amount of heat staying in the reflection plate 5 increases, the temperature of the reflection plate 5 increases. Is kept low due to its large heat capacity. Here, as described above, the solid state light emitting device 4 and the reflection plate 5 are connected via the frame 3 made of a material having excellent thermal conductivity and the thin substrate. That is, since the temperature difference between the solid light emitting element 4 and the reflecting plate 5 is reduced, the temperature rise of the reflecting plate 5 is suppressed as described above, so that the temperature increase of the solid light emitting element 4 is also suppressed low.

  As described above, the lighting device 1 uses the heat generated as a loss in the solid light emitting element 4 via the frame 3 on which the solid light emitting element 4 is disposed and the reflector 5 to cover the case 2 and the cover 6. Heat transfer to the outside of the internal space 7 from the case 2 and the cover 6, and the heat capacity of the reflector 5 can be used to suppress the temperature rise of the solid state light emitting device 4. . Due to these characteristics, the lighting device 1 can appropriately treat the heat generated as a loss in the solid light emitting element 4 disposed in the internal space 7 that is in a sealed state. It is possible to avoid adverse effects due to the heat.

  Furthermore, in this illuminating device 1, the cross section orthogonal to the longitudinal direction of the flame | frame 3 (illuminating device 1) is comprised by the reflective surface 12 of the reflecting plate 5 as a parabolic shape, A solid light emitting element 4 is provided. With this configuration, the light emitted from the solid state light emitting device 4 is converted into parallel light and used for illumination. Based on the above, this illuminating device 1 can suppress the diffusion of light emitted from the solid state light emitting element 4 and illuminate the illumination area brightly.

  In addition, the illuminating device 1 shown in this Embodiment is only one aspect | mode of the illuminating device for tunnels concerning this invention, and various deformation | transformation implementation is possible within the range which does not deviate from the summary of this invention. For example, in the above description, the reflective surface 12 made of metal having a mirror finish has been described. However, the surface of the reflective surface made of metal having a desired reflectivity and diffusivity is not a mirror finish. A reflective member may be attached.

  The tunnel illumination device according to the present invention can be applied regardless of whether it is for roads or for railroads.

1 Tunnel lighting equipment (lighting equipment)
2 Case 4 Solid light emitting device 5 Reflector 7 Internal space 8 Mounting part

Claims (3)

A frame in which a plurality of solid light emitting elements are arranged and fixed on the side surface of a long plate member having a mounting portion below;
Wiring for supplying power from a power source to the solid state light emitting device;
A reflection plate having a reflection surface on the inside for fixing the mounting portion of the frame;
A case in which the reflecting surface of the reflecting plate is directed in the direction of the opening and fixedly housed inside thereof;
A tunnel illumination device comprising: a light-transmitting cover that seals the opening of the case.   The tunnel illumination device according to claim 1, wherein the frame and the reflector are made of metal.   In the cross section orthogonal to the longitudinal direction of the frame, the reflective surface is configured as a parabolic shape, and the solid-state light emitting element is disposed at a parabolic focus that is the reflective surface. The tunnel illumination device according to claim 1 or 2.

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