JP2017100635A - Indicator lamp device for transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator lamp device for transportation which can secure high light intensity and a large lighting area of an indicator lamp and can reduce a depth dimension of the indicator lamp while improving workability of maintenance by using an optical fiber.SOLUTION: An indicator lamp device includes: an optical cable (30) having a plurality of incidence fiber bundles (31), a plurality of emission fiber bundles (33), and a cable part (32); a plurality of light emission elements arrayed on a substrate surface; a fiber holding body which holds end parts of the plurality of incidence fiber bundles in an array corresponding to an array of the plurality of light emission elements; and an indicator lamp arrayed so that end surfaces of the plurality light emission fiber bundles face to an indication direction. An optical fiber is a multicomponent glass fiber of which a wire diameter is 300 μm or less. The optical cable includes an array change part (32A) in which an array of the plurality of optical fibers is pseudo-randomly changed along a light guide direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an indicator lamp device for transportation such as a railroad crossing warning light or a railway traffic signal.

In the past, there have been indicator lights for transportation such as railroad crossing warning lights or railway traffic lights where indicator lights are installed at high places. In such an indicator lamp device, when a light source deteriorates or breaks down, it is necessary to repair or replace the light source using an aerial work vehicle. In this case, since an aerial work vehicle occupies a road or a track, there arises a problem that normal traffic is hindered or the working time is limited to a time zone with a small traffic volume.
Conventionally, in order to improve maintenance workability, there has been a proposal of a traffic signal device that installs a light source near the ground and uses an optical fiber to guide the light of the light source to a high place and turn on an indicator lamp (for example, Patent Document 1). . With this configuration, the light source can be maintained without occupying a road or using an aerial work vehicle.

Japanese Patent Laid-Open No. 10-208192

However, when applying a configuration using an optical fiber to an indicator light device for transportation, it is necessary to satisfy the following requirements. First, in order to ensure visibility, a large amount of light, a large lighting area, and lighting uniformity are required for the indicator lamp. Furthermore, in order to improve the maintenance workability, it is necessary to replace the optical fiber for many years. Further, the longer the repair or replacement cycle of the light source, the better. In addition, it is difficult to request high-precision alignment between the light source and the optical fiber when replacing the light source, and a mechanism for easily replacing the light source is also required.
Furthermore, in the indicator lamp device for transportation, there is also a demand for reducing the depth dimension of the indicator lamp. For example, in an overhang type warning light that is arranged above a road in a level crossing and issues a level crossing warning, the depth dimension cannot be increased in order to maintain the distance between the warning light and the passing area of the train. Also, in traffic lights in heavy snow areas, the depth of traffic lights cannot be increased in order to reduce the snow cover area. At present, an indicator lamp having a small depth is realized by using an LED (light emitting diode) as a light source.

Some of these requirements are generally considered to be contradictory, and it was not easy to satisfy all the requirements.
For example, in order to secure a large amount of light, it may be possible to apply a configuration in which a large number of light sources are used and light is guided to a display lamp by a large number of optical fibers. In order to secure a large lighting area, it is conceivable to apply a configuration in which a plurality of optical fiber emission ends are arranged at intervals from each other in a display lamp and light is emitted from a plurality of locations. However, in this configuration, when some of the many light sources fail, light is not emitted from the optical fiber corresponding to the failed light source. In this case, a conspicuous dark part such as a missing dot occurs in a part of the indicator lamp, and uniform lighting is impaired. Therefore, even when the remaining normal light source has a sufficient amount of light, the light source must be repaired or replaced.

  In order to easily replace the light source, it is conceivable to increase the tolerance of alignment between the light source and the optical fiber by using an optical fiber having a large wire diameter. Thereby, even if an error occurs in the arrangement of the light sources, the error in the amount of light taken into the optical fiber can be reduced. However, when the wire diameter of the optical fiber is increased, the allowable radius of curvature of the optical fiber is increased. On the other hand, in order to achieve uniform lighting in the indicator lamp, it is preferable to bend the optical fiber by 90 ° and arrange the emission end face toward the front. However, when an optical fiber having a large allowable curvature radius is bent by 90 ° in the indicator lamp, the depth dimension of the indicator lamp becomes large.

  The present invention improves the workability of maintenance of the light source unit by using an optical fiber, can secure a large light amount and a large lighting area of the indicator lamp, and can reduce the depth dimension of the indicator lamp. An object of the present invention is to provide an indicator light device for use.

In order to achieve the above object, the traffic light indicator lamp device of the present invention includes a plurality of incident fiber bundles each having a configuration in which a plurality of optical fibers are bundled, and a plurality of configurations each having a configuration in which a plurality of optical fibers are bundled. An optical cable having an output fiber bundle, and a cable portion for guiding light by a plurality of optical fibers from the incident fiber bundle to the output fiber bundle;
A light source unit for entering light into the plurality of incident fiber bundles;
An indicator lamp that emits light by light emitted from the plurality of output fiber bundles;
With
In the optical cable, light incident on a plurality of optical fibers constituting each one of the plurality of incident fiber bundles is divided into all of the plurality of output fiber bundles or a plurality of output fiber bundles. It is characterized by having the arrangement | sequence change part from which the arrangement | sequence of a some optical fiber changes so that it may guide | lead along a light guide direction.

Here, the light source unit is
A plurality of light emitting elements arranged on the substrate surface;
A fiber holder that holds the ends of the plurality of incident fiber bundles in an arrangement corresponding to the arrangement of the plurality of light emitting elements;
Have
Each incident end face of the plurality of incident fiber bundles may be arranged to be larger than each light emitting surface of the plurality of light emitting elements and to face the light emitting surface.
Further, the indicator lamp is arranged so that end portions of the plurality of output fiber bundles are separated from each other and end surfaces of the plurality of output fiber bundles are directed in a display direction,
The optical fiber may be a multicomponent glass fiber having a wire diameter of 300 μm or less.

According to the above configuration, light is incident from a plurality of light emitting elements arranged on the substrate surface via a plurality of incident fiber bundles, so that a large amount of light can be secured. Furthermore, since the light is emitted in the display direction from the end faces of the plurality of output fiber bundles arranged apart from each other and emitted from the indicator lamp, uniform lighting and a large lighting area can be realized.
On the other hand, since such a configuration is adopted, if light is guided from a plurality of light emitting elements to a plurality of emission positions of the indicator lamp without any ingenuity, if some of the light emitting elements break down, the display lamp lacks dots. A noticeable dark area like this can occur. However, according to the present invention, a plurality of incident fiber bundles and a plurality of outgoing fiber bundles are provided by bundling a large number of optical fibers using an optical fiber having a thin wire diameter. Further, the optical cable includes an arrangement changing unit for changing the arrangement of the optical fibers. As a result, even if several light emitting elements fail, the influence of the failure can be distributed to a plurality of outgoing fiber bundles, and it is possible to avoid the occurrence of a conspicuous dark portion such as a missing dot in the indicator lamp.
Furthermore, even if the wire diameter of one optical fiber is reduced, an incident fiber bundle is configured by bundling a plurality of optical fibers, so the diameter of the incident fiber bundle (hereinafter referred to as “binding diameter”) is increased, This incident end face can be formed larger than the light emitting surface of the light emitting element. Thereby, the tolerance of alignment between the light emitting element and the incident end face of the incident fiber bundle is increased, and the work at the time of replacing the light source can be facilitated.

Furthermore, in the indicator lamp, since a plurality of optical fibers are bundled and arranged as an output fiber bundle, even if the diameter of one optical fiber is set to a small diameter of 300 μm or less, the manufacturing process of the indicator lamp The handling of the optical fiber becomes easy. Furthermore, the allowable radius of curvature when bending the optical fiber can be reduced by the above-mentioned wire diameter of the optical fiber. Therefore, the end face of the outgoing fiber bundle can be directed in the display direction without increasing the depth dimension of the indicator lamp. In addition, a configuration for realizing uniform lighting (for example, a diffusing lens, etc.) by arranging the end faces of the plurality of outgoing fiber bundles apart from each other and facing the display direction can be realized by a simple optical system configuration. realizable. By these, the depth of an indicator lamp can be made small.
Furthermore, since multi-component glass fiber is applied as an optical fiber, the service life of the optical fiber is not significantly lowered even when compared with quartz glass fiber, and the service life can be greatly improved as compared with plastic fiber.

Here, the optical fiber may have a light receiving angle of 15 ° or more and 120 ° or less.
According to this configuration, even if the bundling diameter of the incident fiber bundle and the light emitting area of the light emitting element are increased, the end face of the incident fiber bundle can be disposed in the vicinity of the light emitting element to capture a large amount of light. Therefore, a large amount of light can be efficiently secured.
Furthermore, the light source unit includes a substrate holding unit that holds a substrate on which the plurality of light emitting elements are mounted,
The substrate may be configured to be detachable from the substrate holding portion.
According to this configuration, the light source can be easily replaced with the substrate. In addition, the substrate can be removed from the substrate holder and maintenance can be performed by the substrate alone.

  According to the present invention, in an indicator lamp device for transportation, it is possible to secure a large light quantity and a large lighting area of the indicator lamp while improving workability of maintenance by using an optical fiber, and The effect that the depth dimension can be reduced is obtained.

It is a front view which shows the level crossing alarm of embodiment of this invention. The optical cable contained in the level crossing alarm of embodiment is shown, (a) is a whole block diagram, (b) is a figure explaining an arrangement | sequence change part. It is a perspective view which shows a light source and the holding structure of an incident fiber bundle. It is a perspective view which shows the structure for alignment with a light source and an incident fiber bundle. It is a side view which shows a light emitting element and an incident fiber bundle. It is a front view which shows the internal structure of the warning light of the level crossing alarm of embodiment. It is a partially broken side view which shows the internal structure of the warning light of the railroad crossing alarm of embodiment. It is a figure which shows the modification of an optical cable. It is a figure which shows the modification of the structure which injects light into an optical cable from a light source.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing a railroad crossing alarm according to an embodiment of the present invention.
The railroad crossing alarm 1 of the present embodiment is an overhang type railroad crossing alarm that is arranged so that the warning light 40 covers the roads R1 and R2 in the railroad crossing. The railroad crossing alarm 1 is an embodiment of the indicator lamp device for transportation according to the present invention. The railroad crossing alarm 1 includes a main column 10 and a support column 15, a light source unit 20 disposed near the ground, an optical cable 30, and an alarm lamp 40 disposed at a high place. The warning lamp 40 corresponds to an example of an indicator lamp according to the present invention.
The main pillar 10 is set up beside the roads R1 and R2 in the railroad crossing, and is supported on the upper part of the main pillar 10 so that the support pillar 15 extends in the horizontal direction. The road R1 is a sidewalk, for example, and the road R2 is a roadway, for example.

2A and 2B show an optical cable included in a railroad crossing alarm device according to the embodiment. FIG. 2A is an overall configuration diagram, and FIG. 2B is a diagram illustrating an arrangement changing unit. In FIG. 2 (a), a number of the same components are given only a part to avoid complications.
The optical cable 30 is configured by bundling a large number of optical fibers. A plurality of incident fiber bundles 31 are provided on the incident side of the optical cable 30, and a plurality of outgoing fiber bundles 33 are provided on the outgoing side of the optical cable 30. Each of the incident fiber bundles 31 and each of the outgoing fiber bundles 33 is configured by bundling a plurality of optical fibers. For example, one cable portion 32 is provided between the incident fiber bundle 31 and the outgoing fiber bundle 33. In the present embodiment, a large number of optical fibers included in the optical cable 30 have a continuous structure from the incident fiber bundle 31 to the outgoing fiber bundle 33.

The optical fiber is a multicomponent glass fiber having a wire diameter of 300 μm or less. With such a wire diameter and material, this optical fiber has the characteristics that it is bent with a small aging deterioration, a low light propagation loss, and a small radius of curvature.
The diameter of the optical fiber is more preferably 30 μm to 70 μm in diameter. By setting it as such a wire diameter, the output fiber bundle 33 can be bent in a warning lamp 40 with a smaller curvature radius. Thereby, the depth of the warning lamp 40 can be made small as much as the configuration in which the LED light source is arranged on the indicator lamp.
The light receiving angle of the optical fiber is set to 15 ° or more and 120 ° or less. More preferably, the light receiving angle of the optical fiber is 25 ° or more and 80 ° or less. With such a configuration, even if the end face of the incident fiber bundle 31 and the light emitting surface 22a of the light emitting element 22 become large, light can be efficiently taken in. Furthermore, the light irradiated from the end surface of the output fiber bundle 33 can be made into a wide angle. On the other hand, if the light receiving angle is too large, the light propagation loss increases. However, if the value is as described above, an increase in the propagation loss can be suppressed.

Each of the plurality of incident fiber bundles 31 is not particularly limited, and is configured by bundling 700 to 4000 optical fibers, and the bundling diameter is about 2 mm.
Similarly, each of the plurality of output fiber bundles 33 is not particularly limited, but is configured by bundling 700 to 4000 optical fibers, and the bundling diameter is about 2 mm.
The cable portion 32 is configured by bundling a plurality of optical fibers constituting the plurality of output fiber bundles 33 and the plurality of incident fiber bundles 31.

  A portion C of the cable portion 32 is provided with an arrangement changing portion 32A in which the arrangement of optical fibers changes pseudo-randomly as it proceeds in the longitudinal direction of the cable, as shown in FIG. In FIG. 2B, only the optical fibers of the portions 32a and 32b included in the cable portion 32 are extracted and drawn. The light incident on the plurality of optical fibers included in one incident fiber bundle 31 is divided and guided to the plurality of output fiber bundles 33 by the arrangement changing unit 32A. In addition, the optical fibers arranged in a part of the incident fiber bundle 31 (center or end) are dispersed and arranged in various ranges in the outgoing fiber bundle 33.

FIG. 3 is a perspective view showing a light source and an incident fiber bundle holding configuration. FIG. 4 is a perspective view showing a structure for positioning the light source and the incident fiber bundle. FIG. 5 is a side view showing the light emitting element and the incident fiber bundle. In FIG. 3 and FIG. 4, a number of the same components are given only a part to avoid complexity.
The light source unit 20 includes a housing 20a having a waterproof function, a substrate 21 on which a plurality of light emitting elements 22 are mounted, a fiber holder 24 that holds a plurality of incident fiber bundles 31, a substrate 21, and a fiber holder 24. And a positioning mechanism 28 for fixing them in a predetermined positional relationship.
The plurality of light emitting elements 22 are, for example, high-intensity LEDs (light emitting diodes), and are mounted on the substrate 21 while being arranged vertically and horizontally at intervals. With such a configuration, a large amount of light can be secured, and efficient heat dissipation of the plurality of light emitting elements 22 can be realized with a simple structure. In addition, the some light emitting element 22 may be arranged in a line, and may be arranged at random.

The fiber holder 24 holds each end of the incident fiber bundle 31 in an arrangement corresponding to the arrangement of the plurality of light emitting elements 22. Specifically, the fiber holder 24 may employ a structure in which the fiber holder 24 is fixed to a plurality of through holes provided in the plate material through the end portions of the plurality of incident fiber bundles 31.
As the positioning mechanism 28, for example, as shown in FIG. 4, a fitted body 28a and a fitted body 28b that can be fitted to each other in a predetermined arrangement relationship are provided, the substrate 21 is held on one side, and the fiber holding body is held on the other side. The structure which fixes 24 can be employ | adopted. The to-be-fitted body 28a also functions as a board holding part that holds the board 21, and the board 21 can be attached and detached when the fitting between the to-be-fitted body 28a and the fitting body 28b is released. Thereby, when abnormality arises in the light emitting element 22, the light source can be replaced together with the substrate 21. The fitting structure of the positioning mechanism 28 is not limited to the structure shown in FIG. 4, and various structures such as a structure in which fitting pieces are fitted into fitting grooves and positioned relative to each other may be employed.

  As shown in FIG. 5, in a state where the substrate 21 and the fiber holder 24 are fixed, the end face of the incident fiber bundle 31 faces the light emitting element 22 so as to face the light emitting element 22. The area (vertical width and horizontal width) of the light emitting surface 22 a of the light emitting element 22 is smaller than the area (vertical width and horizontal width) of the end face of the incident fiber bundle 31. With this configuration, even if a slight error occurs in the arrangement of the light emitting elements 22, the light irradiated from the light emitting surface 22 a can be taken into a plurality of optical fibers with high efficiency from the end surface of the incident fiber bundle 31.

FIG. 6 is a front view showing a warning light of the railroad crossing alarm according to the embodiment. FIG. 7 is a partially broken side view showing the warning light of the railroad crossing alarm according to the embodiment. In FIG. 6 and FIG. 7, a number of the same components are given only a part to avoid complication.
The warning light 40 includes an output fiber bundle 33, a fiber holder 41 that holds each end of the output fiber bundle 33, and a lens (not shown) that diffuses outgoing light on the front surface of the fiber holder 41. Composed. The warning light 40 is supported by the support column 15 and is disposed at a high place.
The fiber holder 41 has a circular configuration when viewed from the front, and has a casing shape with a small depth dimension. The front surface of the fiber holder 41 is provided with a plurality of fixed pipes 42 through which the end portions of the plurality of output fiber bundles 33 are passed with the end face of the output fiber bundle 33 facing forward (display direction). The plurality of fixed pipes 42 are arranged so as to be separated from each other. The fiber holder 41 is connected to a pipe portion 45 for introducing the optical cable 30 to the side. The plurality of outgoing fiber bundles 33 are introduced into the fiber holder 41 through the pipe portion 45, bent at 90 ° in the fiber holder 41, and passed through the plurality of fixed pipes 42 to be fixed. Yes. The angle at which the output fiber bundle 33 is bent is not limited to 90 °. Based on the direction of the warning light 40 and the angle at which the optical cable 30 is introduced into the warning light 40, an appropriate angle may be bent so that the end face of the output fiber bundle 33 faces the display direction of the warning light 40.

  According to the railroad crossing alarm device 1 configured as described above, a large amount of light can be secured by the plurality of light emitting elements 22 arranged on the substrate 21 in the vertical and horizontal directions. Moreover, since the incident fiber bundle 31 having a larger binding diameter than the light emitting surface 22a of the light emitting element 22 is applied, the light of the light emitting element 22 can be irradiated to the end face of the incident fiber bundle 31 with less leakage. Furthermore, since the multi-component glass fiber having the above-described predetermined light receiving angle is applied as the optical fiber, even if the light emitting element 22 having a large light emitting surface 22a is used, the light irradiated on the end surface of the incident fiber bundle 31 is not affected. It can be efficiently incorporated into an optical fiber. In addition, since such an effect is similarly achieved even if there is a slight error in the arrangement of the light emitting elements 22, high-precision alignment between the light emitting elements 22 and the incident fiber bundle 31 is unnecessary, and the light source It can be easily replaced.

Further, a plurality of output fiber bundles 33 are provided on the output side of the optical cable 30, and the end portions of the plurality of output fiber bundles 33 are spaced apart from each other in the warning light 40, and each end surface is fixed in a state of facing forward. Yes. Thus, a large area of the warning light 40 can be secured, and the warning light 40 can be lit uniformly by adding a simple optical system configuration such as a diffusing lens.
Further, since the multicomponent glass fiber having the above-described predetermined wire diameter is applied as the optical fiber, the output fiber bundle 33 can be bent and fixed by 90 ° with a small radius of curvature in the fiber holder 41. . As a result, the depth of the warning light 40 can be reduced. In addition, since multi-component glass fiber is applied as an optical fiber, the service life of the optical fiber does not decrease much compared to quartz glass fiber, and the service life can be greatly improved compared to plastic fiber.

  Furthermore, even if some light emitting elements 22 fail due to the arrangement changing unit 32A of the optical cable 30 and light is no longer incident on some incident fiber bundles 31, the influence of this failure may affect the plurality of outgoing fiber bundles 33. It is dispersed and does not concentrate on one output fiber bundle 33. Therefore, if the overall light quantity is sufficient by the remaining light emitting elements 22 that have not failed, the alarm lamp 40 is normally lit. Therefore, it is possible to avoid a situation where the light source needs to be repaired or replaced even though the overall light quantity is sufficient.

  Furthermore, in the level crossing alarm device 1 of the present embodiment, the structure for supporting the warning lights 40 such as the main column 10 and the support column 15 can be the same as that of a level crossing alarm device using a conventional LED light source. . Accordingly, the warning light of the conventional railroad crossing alarm device is replaced with the warning light 40 of the present embodiment, and the light source unit 20 and the optical cable 30 are attached to the main pillar 10 or the like, whereby the railroad crossing alarm device 1 of the present embodiment. Can be realized.

(First modification)
FIG. 8 is a diagram illustrating a modification of the optical cable.
The railroad crossing alarm device of the first modified example uses the optical cable 30A of FIG. 8 as a configuration for guiding light from the light source unit 20 to the warning light 40. The optical cable 30 </ b> A is configured such that a portion on the incident side including the incident fiber bundle 31 can be separated from the cable portion 32. The divided portion is configured to be connected and divided by the connectors 35a and 35b. By connecting the divided portions with the connectors 35a and 35b, the individual optical fibers are opposed to and close to each other between the incident side and the cable portion 32, so that light propagates from the incident side to the cable portion 32. .

  According to such a configuration, the optical cable 30A can be set in the casing 20a by providing a through hole in the casing 20a of the light source unit 20 and passing the optical cable 30A through the through hole from the connector 35a (or 35b) side. it can. With such a configuration, the waterproof function of the portion through which the optical cable 30A of the housing 20a passes can be realized with an easy structure.

(Second modification)
Although the illustration of the railroad crossing alarm device of the second modification is omitted, the end faces of the plurality of outgoing fiber bundles 33 are opposed to the end faces of the plurality of outgoing fiber bundles 33 without facing the display direction of the warning light in the warning light. In this example, a plurality of reflection mirrors are installed. The plurality of reflecting mirrors are tilted and fixed inside the warning light so as to reflect the light emitted from the end faces of the plurality of outgoing fiber bundles 33 in the display direction of the warning light 40.

  According to the railroad crossing alarm device of the second modified example, the loss of light is increased by the reflecting mirror as compared with the railroad crossing alarm device 1 of the embodiment of FIG. The depth of the warning light increases as the system configuration increases. However, even if it is this structure, the workability | operativity of the maintenance of a level crossing alarm can be improved by using the optical cable 30. FIG.

(Third Modification)
FIG. 9 is a diagram illustrating a modification of the configuration in which light is incident on the optical cable from the light source.
The railroad crossing alarm device of the third modification is a modification of the configuration in which light is incident on the optical cable 30 from the plurality of light emitting elements 22.
In the third modification, a light guide 29 is provided between the plurality of light emitting elements 22 on the substrate 21 and the plurality of incident cable bundles 31 of the optical cable 30. The light guide 29 has a truncated cone shape, for example, and has an end surface with a large area facing the plurality of light emitting elements 22 of the substrate 21 to capture light, and an end surface with a small area facing the incident end surface of the plurality of incident cable bundles 31. Thus, the light is guided to the incident cable bundle 31.

The light guide 29 is made of, for example, transparent glass or resin. The side surface of the light guide 29 is made of, for example, a material having a lower refractive index than the inside of the light guide 29 or coated with a metal film so that light passing through the light guide 29 does not leak outside. Also good.
Or the light guide 29 is good also as a structure which hardened many optical fibers in the shape of a truncated cone.
According to the railroad crossing alarm of the third modified example, the loss of light increases when light is taken into the optical cable 30 as compared with the configuration in which light is incident as shown in FIG. 3, but the manufacturing process of the light source unit 20 is simplified. Can be

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the configuration in which the present invention is applied to a standard overhang type railroad crossing alarm device in which a supporting column is fixed to the upper part of one main column has been described as an example. However, the present invention can also be applied to a specially shaped level crossing alarm such as a gate-type level crossing alarm.
Moreover, in the said embodiment, although the specific structural example of the incident fiber bundle 31 and the output fiber bundle 33 was shown, for example, the number of the optical fibers which comprise the one incident fiber bundle 31 or the one output fiber bundle 33 For example, an appropriate number such as 10 orders, 100 orders, and 1000 orders may be selected. Also, the number of the plurality of incident fiber bundles 31 and the number of the plurality of outgoing fiber bundles 33 may be different numbers, or the number of optical fibers constituting one incident fiber bundle 31 and one outgoing fiber bundle 33 are constituted. The number of optical fibers may be different.

Moreover, in the said embodiment, it demonstrated taking the case of the structure by which the one board | substrate with which the several light emitting element was mounted was accommodated in the light source part. However, there may be a plurality of substrates on which the issuing elements are mounted, and a plurality of light source units may be provided so that one light source unit corresponds to one warning light. In addition, a plurality of substrates may be provided in the light source unit, and one light emitting element may be mounted on each of the plurality of substrates.
Moreover, although the example which applied this invention to the level crossing alarm was demonstrated in the said embodiment, this invention is applicable to the indicator lamp apparatus for various transportations, such as a traffic signal for railways. Moreover, in the said embodiment, although the incident fiber bundle and the output fiber bundle were made into the same number, it is good also as a different number. Moreover, you may provide a some light source part corresponding to a some indicator light, respectively. In addition, the details shown in the embodiments can be changed as appropriate without departing from the spirit of the invention.

1 Railroad crossing alarm (indicator lamp for transportation)
DESCRIPTION OF SYMBOLS 10 Main pillar 15 Supporting pillar 20 Light source part 21 Board | substrate 22 Light emitting element 22a Light emission surface 24 Fiber holder 28 Positioning mechanism 28a Fitted body 28b Fitting body 30, 30A Optical cable 31 Incident fiber bundle 32 Cable part 32A Arrangement | change part 33 Output fiber bundle 35a, 35b Connector 40 Warning light (indicator light)
41 Fiber holder 42 Fixed pipe 45 Pipe section

Claims (5)

A plurality of incident fiber bundles each configured to bundle a plurality of optical fibers, a plurality of output fiber bundles each configured to bundle a plurality of optical fibers, and a plurality of optical fibers from the incident fiber bundle to the output fiber bundle An optical cable having a cable portion for guiding light;
A light source unit for entering light into the plurality of incident fiber bundles;
An indicator lamp that emits light by light emitted from the plurality of output fiber bundles;
With
In the optical cable, light incident on a plurality of optical fibers constituting each one of the plurality of incident fiber bundles is divided into all of the plurality of output fiber bundles or a plurality of output fiber bundles. An indicator lamp device for transportation, comprising an arrangement changing unit that changes the arrangement of a plurality of optical fibers along a light guide direction so as to be guided. The light source unit is
A plurality of light emitting elements arranged on the substrate surface;
A fiber holder that holds the ends of the plurality of incident fiber bundles in an arrangement corresponding to the arrangement of the plurality of light emitting elements;
Have
2. The transportation system according to claim 1, wherein each incident end face of the plurality of incident fiber bundles is arranged to be larger than each light emitting surface of the plurality of light emitting elements and to face the light emitting surface. Indicator light device. The indicator lamps are arranged so that end portions of the plurality of output fiber bundles are separated from each other and end surfaces of the plurality of output fiber bundles are directed in a display direction,
3. The traffic light indicator lamp device according to claim 1, wherein the optical fiber is a multicomponent glass fiber having a wire diameter of 300 [mu] m or less.   The indicator light device for a transportation system according to claim 2, wherein the optical fiber has a light receiving angle of 15 ° or more and 120 ° or less. The light source unit includes a substrate holding unit that holds a substrate on which the plurality of light emitting elements are mounted,
The said lamp | ramp is a structure which can be attached or detached to the said board | substrate holding | maintenance part, The indicator lamp apparatus for transportation as described in any one of Claims 1-4 characterized by the above-mentioned.

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