JP2019200853A - Head light for track traveling vehicle - Google Patents

Abstract

To provide a head light that has a structure and a lighting function suitable as a head light for a track traveling vehicle like a railroad vehicle.SOLUTION: A head light includes: three or more groups of LED light source sets which are arrayed and fixed dispersively in two-dimensional directions on the front side of an LED substrate (where an LED light source set of each group comprises a main lamp LED and a subordinate lamp LED arranged closely to each other); a condenser lens which is installed on an upper surface of each LED light source, and has its bottom part fixed to the LED substrate; a controller which is installed outside the back side of the LED substrate, and selectively supplies electric energy to each of a main lamp LED and a subordinate lamp LED of each LED light source set; a light-transmissive cover which is made to cover the front side of the LED substrate; and a heat sink which is installed on the back side of the LED substrate.SELECTED DRAWING: Figure 3

Description

The present invention relates to a headlamp for a track traveling vehicle. More particularly, the present invention relates to an improved headlamp for a vehicle that travels on a previously installed track, such as a railway vehicle.

In vehicles such as automobiles traveling on the ground and railway vehicles traveling along a track, there is an illuminating lamp called a headlamp that emits illumination light toward the front in the traveling direction of the vehicle in order to ensure safety during traveling. It is usually provided. Incandescent lamps have been used as light sources for vehicle headlamps, and then halogen lamps have been used. However, in recent years, vehicles that run on the ground, such as automobiles, use LEDs that consume less energy as light sources. Some headlamps are also being used.

  Many patent applications have already been filed for configurations and control systems that use LEDs as headlamps for vehicles traveling on the ground such as automobiles. Examples of which are described in Patent Document 1 and Patent Document 2 described below. List published patent applications.

  For headlamps installed on vehicles traveling on the ground (especially roads) such as automobiles, it is necessary to emit light with sufficient illuminance, as required by law, but it is also preferred by many automobile-related companies. Considering the diversity of design, there are many patent applications because a wide range of research has been conducted by many automobile headlamp development companies.

  On the other hand, regarding the headlamp of a vehicle traveling on a track such as a railway vehicle, there are few requirements for the illumination function compared to the headlamp of an automobile in consideration of the traveling conditions. In other words, although it is natural that the headlight of a railway vehicle needs to emit light having a necessary illuminance, in fact, other than that, the situation of the surroundings of the railway track by the driver of the railway vehicle is actually sufficient. High visibility, and it is easy for the driver of the oncoming vehicle to confirm the traveling direction of the railway vehicle, and it does not obstruct the driving operation of the driver of the oncoming vehicle. In the relevant ministerial ordinance, “sign lights: the direction of travel of the train can be confirmed from the front and rear of the train at night. "

  However, the Japan Railway Vehicle Industry Association has established “Railway Vehicle-Halogen Shielded Beam Lamp (JRIS-R-1643)” as a standard for railway vehicle headlamps based on deliberation by the Japan Railway Vehicle Industry Association Standard Review Committee. ing. As for the basic structure of a halogen shield beam (HSB) lamp for railway vehicles defined in the standard for headlamps of this railway vehicle, a round lamp is taken as an example, and a front view and a side view thereof are respectively shown in the accompanying drawings. This will be briefly described below with reference to (a) and (b) of 1.

  As shown in FIGS. 1A and 1B, a round HSB lamp 1 is composed of a lamp vessel comprising a hemispherical reflecting mirror 2 constituting the latter half part and a transparent cover 3 constituting the first half part, and It is composed of two halogen lamps (light-emitting tubes) 4 and 5 fixed in parallel to the bottom of the reflector of the lamp vessel. The two light-emitting tubes are composed of a light-emitting tube 4 fixed to the central portion of a reflecting mirror called a main lamp and a light-emitting tube 5 called a sub-lamp arranged and fixed in parallel to the upper part of the main light 4. The main lamp 4 radiates illumination light in front of the HSB lamp 1 and in a direction perpendicular to the HSB lamp 1 because of its fixed position. On the other hand, since the fixing position of the secondary lamp 5 is shifted upward from the center of the reflecting mirror 2, the illumination light is radiated obliquely downward although it is in front of the HSB lamp 1.

  As described above, the main light 4 gives illumination light radiated toward the front of the railway vehicle, that is, illumination light radiated in a direction parallel to the railroad track, and the sub-light 5 is a front lower side of the railway vehicle. Gives illumination light emitted toward. Accordingly, the main lamp 4 is turned on during normal travel (operation) of the railway vehicle. On the other hand, the sub-light 5 is turned on when a vehicle traveling oppositely approaches or when it approaches the platform of the station. For this reason, the driver of the oncoming vehicle can feel the glare and prevent the situation that hinders normal driving, and it can also make the passengers waiting for the vehicle approach at the station platform uncomfortable. Can be avoided.

  Each of the main lamp 4 and the sub lamp 5 is connected to a terminal group 6 including a main lamp terminal, a sub lamp terminal and a common terminal for supplying electric energy from the outside. Switching of the light emission operation between the main lamp 4 and the sub lamp 5 is performed by a switch (not shown) provided outside the HSB lamp and electrically connected to the main lamp terminal, the sub lamp terminal and the common terminal. .

  As described above, in the headlamp of a vehicle traveling on the ground such as an automobile, the LED light source is being used in an LED, and therefore, an automotive LED headlamp having various configurations has been developed. On the other hand, although it is speculated that the use of LED for the headlights of railway vehicles is also being considered, for the use of LED for the headlights of railroad vehicles, railway vehicles equipped with railcar headlamps are frequently updated. It seems that there is not enough progress because there are circumstances where it is not.

  That is, most railway vehicles currently in operation have a halogen lamp headlamp having a structure in accordance with the above-mentioned headlight standard JRIS-R-1643. When the headlamps are converted to LEDs, that is, when the light source is switched from the halogen lamp to the LED, the external structure of the lamp using the LED as the light source is shown in FIG. 1 unless the entire vehicle is updated. It should be substantially the same as the halogen shield beam lamp.

  However, there are not a few problems that cannot be solved simply by replacing the halogen lamp (light emitting tube), which is a light source, with an LED. One of them is a problem of low heat resistance inherent in the LED itself. That is, in order to use the main lamp and the sub-halogen lamp in FIG. 1 by replacing them with LEDs, considering the insufficient light emission characteristics of the LEDs (insufficient light emission amount per unit area), it is high. Although it is necessary to use an LED exhibiting light emission characteristics, application of high power is required for light emission of an LED exhibiting high light emission characteristics. And when using LED which light-emits by such application of high electric power, the problem of the high temperature of LED peripheral environment resulting from the high heat_generation | fever generate | occur | produced with the high-intensity light emission from LED generate | occur | produces. For this reason, the problem that it cannot be avoided that LED deteriorates within a short time occurs.

  The inventor of the present invention (the present inventor) has converted the headlamp having a structure according to JRIS-R-1643 into an LED, that is, the JRIS-R-, which has been used as a railcar headlamp so far. Research was conducted with the aim of switching the light source to an LED without the need for drastically changing the configuration of a headlamp using a halogen lamp having a structure according to 1643. And when conducting the research, we investigated patent publications and published patent publications that disclose patent applications that have already been filed or pending applications, and the investigation describes an invention that presents a specific solution to the above problem. I couldn't find the patent gazettes and published patent gazettes I made.

  The inventor continued the investigation after that, and there was a railway vehicle that is operated in the Tokyo area, which seems to be equipped with a headlamp using an LED as a light source, and was actually operated. I realized that That is, when observing the lighting behavior of the headlamps of some railway vehicles that are actually operated, the lower half of the headlamps shine brightly during normal operation, while the upper half remains dark. However, when the vehicle approaches the platform of the station, it is observed that the upper half of the headlight now shines brightly, and that the lower half is now dark. It was. Accordingly, in such a headlamp, an LED and a lens for orienting light obliquely downward are arranged in the upper half region of the HSB lamp shown in FIG. It was estimated that the headlight would be a LED light source in which the LED and a lens that orients light horizontally are combined in the lower half area.

JP 2010-40528 A JP 2017-336339 A

Railway vehicle-halogen shield beam lamp (JRIS-R-1643: 2013), issued by Japan Railway Vehicle Industry Association

  Regarding the lighting behavior of a headlamp that is presumed to use an LED as a light source for a railway vehicle as described above (that is, the manifestation of a clear switching between bright and dark areas in the headlamp), the function as the headlamp However, the lighting behavior of the headlamps is significantly different from that of the headlamps using conventional HSB lamps and the brightness is not enough. The problem that nature stands out occurs.

  The present inventor has developed a headlamp having a novel configuration that replaces a headlamp that uses an LED that is presumed to be adopted in a railway vehicle that actually operates as described above, that is, In a limited space, research was repeated with the aim of developing a headlamp that shows brightness and lighting behavior that is almost the same as a conventional headlamp using a halogen lamp (light-emitting tube) as a light source. As a result, the present invention described below has been reached.

  The headlamp for a track vehicle provided by the present invention includes: an LED substrate; at least three LED light source sets fixed in a two-dimensional distributed manner on the surface of one side of the LED substrate; Each LED light source set is composed of a main light LED and a sub light LED arranged close to each other; provided on the upper surface of each LED light source set and fixed to an LED substrate or a heat sink described later. A condensing lens; an electric energy supply means for selectively supplying electric energy to the main light LED and the sub light LED; a light-transmitting cover placed on the front side of the LED substrate; and provided behind the LED substrate A headlamp having a structure including a heat sink.

  That is, the present invention prepares a plurality of LED light source sets of the main light LED light source and the sub light LED light source in a state in which the proximity and parallel arrangement of the LED light source as the main light and the LED light source as the sub light is maintained, An LED illumination unit is configured by disposing a condenser lens on each upper surface of the LED light source set, and these LED illumination units are dispersedly arranged in a two-dimensional direction on the surface side of one side of the LED substrate. A headlamp for an orbital vehicle characterized by a point that is fixed in a standing state.

The preferable aspect of the headlamp of the track traveling vehicle of the present invention is as follows.
(1) The above-mentioned electric energy supply means is provided on the back surface of the LED board, and the main light LED input terminal and the sub light LED that are electrically connected to the main light LED and the sub light LED of each LED light source set. An electric energy input terminal comprising a lamp LED input terminal and a common terminal; a first electric circuit for connecting the main light LEDs of each LED light source set in series; a second electric for connecting the sub-light LEDs of each LED light source set in series A circuit; an LED drive driver for electrically connecting the main light LED input terminal, the sub light LED input terminal, the common terminal, and the first electric circuit and the second electric circuit; The light LED input terminal and the common terminal are electrically connected to the first electric circuit and the second electric circuit, respectively, and electric energy is supplied to the first electric circuit or the second electric circuit. A controller for controlling the driving of the LED driver to alternatively supply.

(2) The LED light source that is the main lamp of each LED illumination unit is disposed at the focal point of the condenser lens of the unit, and the LED light source that is the sub lamp is disposed close to the upper side of the LED light source that is the main lamp.
(3) Each of the LED light source set and the condensing lens is composed of six pairs having the same size and illumination performance, with one set of the LED light source set and the condensing lens as the other five sets of LED light source sets. The condensing lens is arranged at a uniform interval around a position centered on the set of LED light sources.
(4) The headlamp of the present invention for use as a substitute for a railway vehicle-halogen shield beam lamp in accordance with the Japan Railway Vehicle Industry Association Standard JRIS-R-1643.

  The present invention also provides a track traveling vehicle provided with the headlamp configured as described above.

By using the headlamp of the present invention, the brightness of the headlamp is manifested when switching between when the main lamp LED is lit and when the sub lamp is lit while the headlamp is an LED. When the headlamp is viewed from the outside as in the conventional halogen shielded beam lamp according to the provisions of JRIS-R-1643 using a halogen lamp (arc tube) as a light source, since the unnatural position is not seen. Even when only the main light is lit or when only the sub-light is lit, the brightness that spreads almost uniformly in the entire headlight is observed.

A front view (a) and a side view (b) of a round railway vehicle-halogen shield beam lamp according to Japanese Railway Vehicle Industry Association Standard JRIS-R-1643 used in the past are shown. The front view (a) which shows the structural example of the headlamp of the vehicle which drive | works the track according to this invention, a side view (b), and the side cover of a headlamp is removed, and the arrangement | positioning condition of a heat sink is shown. A partially exploded side view (c) is shown. FIG. 3 is a side view taken along an arrow in the partially exploded side view (c) of the headlamp of FIG. 2, and a plurality of LED illumination units provided inside a transparent cover on the front side of the headlamp are arranged on one side of an LED substrate. It shows a state in which it is dispersed and fixed in a two-dimensional direction on the surface of the side. It is an enlarged view which shows the structure of the LED illumination unit which comprises the headlamp of FIG. An example of an electric energy supply system that supplies electric power while switching electric energy to each of a main light LED and a sub light LED of a plurality of sets of LED lighting units arranged in a headlight of a vehicle traveling on a track according to the present invention. FIG. Another electric energy supply system for supplying electric power while switching electric energy to each of a main light LED and a sub light LED of a plurality of sets of LED lighting units arranged in a headlight of a vehicle traveling on a track according to the present invention It is an electric circuit diagram which shows an example.

  The headlamp of the track traveling vehicle of the present invention will be described with reference to FIGS. 2 to 5 of the accompanying drawings, taking the round type headlamp shown in FIG. 1 as an example. Although the square type headlamp is not particularly described, the configuration of the round type headlamp described below and the square type rail vehicle according to the Japan Railway Vehicle Industry Association Standard JRIS-R-1643-halogen shield When read in conjunction with the description of the beam lamp, a headlamp using the LED of the present invention as a light source (hereinafter sometimes abbreviated as LED headlamp) is not only a round shape but also a square shape LED headlamp. However, it should be easily understood that the same configuration can be used.

2 and 3, the LED headlamp 11 includes a transparent cover 12 on the front side and an LED substrate 14 having a plurality of LED illumination units 13 on the rear side. A plate 15 is provided. The LED illumination unit 13 includes a pair of LEDs (LED light sources), that is, an LED light source set including a main light LED 13a that functions as a main light, and a sub light LED 13b that functions as a sub light, and each LED light source set. And a condensing lens 16 fixed to the LED substrate 14 at the bottom. However, the condenser lens 16 is not necessarily fixed to the LED substrate 14 at the bottom, and may be indirectly fixed via any means. Further, the condenser lens 16 may be fixed directly or indirectly to the heat sink 15.
In the case where the condensing lens having the shape shown in FIGS. 2 and 3 is used, it is slightly wider than the sub lamp LED at a position close to the upper side of the sub lamp LED 13b (that is, the side opposite to the main lamp LED 13a). It is preferable to prevent the light emitted from the sub lamp LED 13b from spreading upward by providing the light shielding plate 13c.

  On the back surface of the LED substrate 14, an electrical energy input terminal 17 that supplies electrical energy to each LED light source set is provided.

The LED headlamp 11 shown in FIG. 2 includes a total of six sets of LED lighting units 13. The six sets of LED lighting units 13 are composed of a set of LED lighting units located in the center of the headlamp and five sets of LED lighting units arranged evenly around the central LED lighting unit. ing. However, such an arrangement of the LED lighting unit is preferable for the LED headlamp of the present invention, but is not essential.

  As shown in FIG. 3, each LED illumination unit 13 of the LED headlamp 11 of the present invention has an LED light source set composed of a pair of LEDs (LED light sources) 13a and 13b on the surface of the LED substrate. A condensing lens 16 is provided in front of each LED light source set (upward when viewed from the substrate) to collect the light emitted from the LED light source and define the light irradiation direction. . The LED 13a functioning as the main light is arranged and fixed at the center of the condenser lens 16 (the focal position of the condenser lens 16), and the LED 13b functioning as the auxiliary light is arranged close to the upper side of the main light LED 13a. It is preferred that In addition, as the heat sink 15 attached to the back of the LED substrate 14 or the LED substrate, various LED substrates and heat sinks that have been known or used so far in various lighting devices that use LEDs as light emitting sources. Since it can be used, a detailed description of the LED substrate and the heat sink is omitted.

  Next, the preferable aspect of the electrical energy supply system which supplies an electrical energy to each LED lighting unit 13 is demonstrated with reference to FIG.

  In FIG. 5, the electric energy supply system includes a first electric circuit that connects the main light LEDs of each LED light source set in series; a second electric circuit that connects the sub-light LEDs of each LED light source set in series; LED drive driver (LED driver) for electrically connecting each of the LED input terminal, the sub-light LED input terminal, the common terminal, and each of the first electric circuit and the second electric circuit; Electrically connected to each of the LED light input terminal and the common terminal, and each of the first electric circuit and the second electric circuit, and the electric energy is alternatively set to the first electric circuit or the second electric circuit. A controller for controlling the drive of the LED driver to be supplied.

  By configuring the electric energy supply system as described above, all the main lamp LEDs are turned on all at once, and the sub lamp LEDs are turned on all at the same time when all the main lamp LEDs are turned off. By adopting such an electric energy supply system, the entire front face of the headlamp is always kept bright.

  However, the electric energy supply system used for the headlamp of the track traveling vehicle of the present invention is not necessarily the system having the circuit configuration shown in FIG. 5, for example, as shown in FIG. It is also possible to provide an electric energy supply system including a separate driver and a sub-light lighting driver. When the electric energy supply system having such a circuit configuration is used, the electric energy supply system itself is increased in size, but there is no problem in the normal operation of the headlamp of the track traveling vehicle of the present invention.

DESCRIPTION OF SYMBOLS 1 Round railway vehicle HSB headlamp according to JRIS-R-1643 2 Reflector 3 Transparent cover 4 Main lamp luminous tube 5 Sublight luminous tube 11 LED headlamp of the present invention 12 Transparent cover 13 LED lighting unit 13a Main lamp LED
13b Sub-light LED
13c Shading plate
14 LED board 15 Heat sink 16 Condensing lens 17 Input terminal

Claims (6)

  LED substrate; at least three LED light source sets fixed in a two-dimensional distribution state on the surface of one side of the LED substrate, provided that each set of LED light source sets is arranged close to each other Condensing lens provided on the upper surface of each LED light source set and fixed to an LED substrate or a heat sink described later; An electric energy supply means for selectively supplying electric energy; a light-transmitting cover placed on the front side of the LED board; and a heatsink provided behind the LED board; The above-mentioned electric energy supply means is provided on the back surface of the LED board, and the main light LED input terminal and the sub light LED input that are electrically connected to the main light LED and the sub light LED of each LED light source set, respectively. An electric energy input terminal comprising a terminal and a common terminal; a first electric circuit for connecting the main light LEDs of each LED light source set in series; a second electric circuit for connecting the sub-light LEDs of each LED light source set in series; LED driver that electrically connects each of the LED light input terminal, the sub-light LED input terminal, the common terminal, and each of the first electric circuit and each of the second electric circuit; main light LED input terminal and sub-light LED input Electrical connection is made to each of the terminal and the common terminal, the first electric circuit, and the second electric circuit, and the electric energy is selected as the first electric circuit or the second electric circuit. To supply to a controller for controlling the driving of the LED driver, headlamp according to claim 1.   The headlamp according to claim 1 or 2, wherein the main lamp LED of each LED illumination unit is arranged at the focal point of the condenser lens of the unit, and the sub lamp LED is arranged close to the upper side of the main lamp LED.   Each of the LED light source set and the condensing lens is composed of six pairs having the same size and illumination performance, and the other five LED light source sets and the condensing lens are centered on one LED light source set and the condensing lens. The headlamp according to any one of claims 1 to 3, wherein and are arranged at uniform intervals around a position centered on the set of LED light sources. The headlamp according to any one of claims 1 to 4, which is a headlamp for use as a substitute for a railway vehicle-halogen shield beam lamp in accordance with Japan Railway Vehicle Industry Association Standard JRIS-R-1643. light.   A track traveling vehicle comprising the headlamp according to any one of claims 1 to 5.