JP5721259B2 - Railroad crossing warning light - Google Patents

Description

  The present invention relates to a level crossing warning light installed at a level crossing.

  A railroad crossing is a section where a railroad and a road intersect. A railroad crossing alarm will be installed at the railroad crossing to alert road passers. The railroad crossing alarm is installed on the left side from the road to the railroad crossing in principle on both sides of the railroad crossing line. The level crossing alarm has a level crossing warning light that emits red light. The light emission of the railroad crossing warning light has a predetermined line-of-sight distance and is visually recognized by road passers. Some level crossing warning lights have a light bulb and a red circular lens. However, when such a crossing warning light is viewed from a position close to the track, the angle formed by the optical axis of the circular lens and the viewing direction is large, so that it is difficult to visually recognize the light emission.

  As a railroad crossing warning light aiming at improving visibility from multiple directions, a light having a multi-surface light emitter in a glove has been proposed (for example, see Patent Document 1). However, such a level crossing warning light has a multi-faced light emitter composed of a large number of light emitting diode substrates, which makes the structure complicated and expensive. If the number of the multi-surface light emitters, that is, the number of light emitting diode substrates is reduced, the configuration is simplified. However, depending on the viewing direction, the luminance is lowered and the visibility of the crossing warning light is lowered.

JP 2010-179664 A

  The present invention solves the above-described problems, and an object thereof is to provide a railroad crossing warning light that emits light substantially uniformly around 360 degrees with a simple configuration.

A railroad crossing warning light of the present invention is installed at a railroad crossing, and has a cylindrical light source part , a bottomed cylindrical light-transmitting cover part that covers the light source part, and an outside of the cover part. and a plurality of back plate extending radially in plan view, light emission not circular in a side view, and wherein the shape der Rukoto having a straight left and right sides and the upper side.

  In this crossing warning light, it is preferable that the light source unit has a cylindrical substrate and a plurality of light emitting diodes arranged in a plane on the substrate.

  In the railroad crossing warning light, the light source unit is preferably formed in a cylindrical shape by bending a flat substrate on which the light emitting diode is mounted.

  In the railroad crossing warning light, it is preferable that the base material of the substrate is a thermoplastic resin.

  In this railroad crossing warning light, the light source unit may be composed of two semi-cylindrical rigid boards on which the light emitting diodes are mounted.

  In this railroad crossing warning light, it is preferable that the cover portion is formed with irregularities for diffusing the light emitted from the light source portion on the inner surface or the outer surface.

  In this crossing warning light, it is preferable that the installation angle of each of the plurality of back plates can be changed in plan view.

  According to the railroad crossing warning light of the present invention, the cylindrical light source unit emits light, so that light can be emitted substantially uniformly around 360 degrees. Further, since the light source portion is cylindrical, the configuration is simpler than that of a crossing warning light having a large number of flat light emitting diode substrates.

1 is a front view of a level crossing alarm device having a level crossing warning light according to an embodiment of the present invention. The front view of the level crossing warning light. The perspective view which looked at the level crossing warning light from diagonally downward. Sectional drawing of the level crossing warning light. The expanded view of the light source part in the level crossing warning light. The top view of the auxiliary light source part in the level crossing warning light. The bottom view of the level crossing warning light. The perspective view which looked at the level crossing warning light from diagonally upward.

  A railroad crossing warning light according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the level crossing warning light 1 is attached to the alarm column 21 of the level crossing warning device 2 via a bracket 22 and is installed at the level crossing as a set of two lights. The railroad crossing warning device 2 includes a warning sound generator 23, a warning sign 24, a train traveling direction indicator 25 and the like in addition to the railroad crossing warning light 1.

  As shown in FIGS. 2 and 3, the railroad crossing warning light 1 includes a cylindrical light source unit 3, a translucent cover unit 4 that covers the light source unit 3, a plurality of back plates 5, a shaft unit 11, and the like. The top plate 12 is provided. The back plate 5 extends radially outside the cover portion 4 in plan view.

  As shown in FIG. 4, the light source unit 3 is a light source for emitting light around the railroad crossing warning light 1, and in the present embodiment, a cylindrical substrate 31 and a planar shape on the substrate 31 are provided. And a plurality of light emitting diodes 32 (hereinafter referred to as LEDs). The railroad crossing warning light 1 has an auxiliary light source unit 6 as a light source in addition to the light source unit 3 in the lower part of the cover unit 4. The auxiliary light source unit 6 is an auxiliary light source for emitting light near the level crossing warning light 1. The auxiliary light source unit 6 may be omitted. In FIG. 4, the back plate 5 is not shown.

  The light source unit 3 is formed into a cylindrical shape by bending a flat substrate 31 on which the LEDs 32 as shown in FIG. 5 are mounted.

  The substrate 31 of the light source unit 3 is a printed wiring board, and the base material is a thermoplastic resin such as polytetrafluoroethylene. In the manufacture of the light source unit 3, the LED 32 is mounted on the flat substrate 31. The substrate 31 on which the LEDs 32 are mounted is plasticized by heating in a temperature range that does not damage the LEDs 32, is formed into a cylindrical shape, and is cooled to room temperature. The substrate 31 has a cylindrical shape at room temperature and is sandwiched from above and below by the top plate 12 and the support plate 13 (see FIG. 4). The top plate 12 and the support plate 13 are fixed to the shaft portion 11. The shaft part 11 is a hollow shaft, and wiring (not shown) for supplying power to the light source part 3 and the auxiliary light source part 6 is passed through the hollow part. The upper end of the shaft portion 11 is connected to the tip of the bracket 22. The base end side of the bracket 22 is attached to the alarm column 21.

  The substrate 31 of the light source unit 3 may be a flexible substrate. The flexible substrate is a flexible printed wiring board. When the substrate 31 is a flexible substrate, the shape is maintained by the upper and lower ends being supported by annular grooves formed in the top plate 12 and the support plate 13.

  The substrate 31 of the light source unit 3 may be a rigid substrate. The rigid substrate is a hard substrate having no flexibility, and is preferably a metal substrate having an insulating layer and a metal plate in order to promote heat dissipation of the LED 32. The light source unit 3 may have a cylindrical shape by combining two semi-cylindrical rigid substrates on which the LEDs 32 are mounted. Moreover, you may comprise the light source part 3 by mounting LED32 on a cylindrical rigid board | substrate.

  The LED 32 is a red LED, and emits visible light mainly in the red wavelength region. The light source unit 3 has a large number of LEDs 32 arranged in a planar shape, and becomes a substantially cylindrical planar light source. In this embodiment, 11 LEDs 32 vertically and 76 horizontally, 836 in total, are arranged on a rectangular substrate 31 having a length of 163 mm, and are connected in series and parallel by printed wiring. Molded into. The size of the substrate 31 and the number of LEDs 32 are not limited to this.

  As shown in FIG. 6, the auxiliary light source unit 6 includes an annular substrate 61 and a plurality of LEDs 62 arranged in a planar shape on the substrate 61. The LED 62 is a red LED. The annular substrate 61 is a printed wiring board and is attached to the lower surface side of the support plate 13. In the present embodiment, the auxiliary light source unit 6 has an LED array density lower than that of the light source unit 3 and an annular row of eleven LEDs 62 on an annular substrate 61 having a diameter of 144 mm and an opening having a diameter of 55 mm. Were arranged in two rows concentrically. The size of the substrate 61 and the number of the LEDs 62 are not limited to this.

  The cover part 4 is formed by molding a translucent resin such as acrylic or polycarbonate, and is transparent in red or colorless and transparent (see FIG. 4). The shape of the cover part 4 is a bottomed cylindrical shape. The light source unit 3 is accommodated in the cover unit 4 so that the symmetry axis thereof substantially coincides with the symmetry axis of the cover unit 4. The upper opening of the cover part 4 is closed by the top plate 12. The top plate 12 protrudes outward (in the radial direction) from the cover portion 4, and the protruding portion functions as a ridge.

  The cover part 4 has an uneven surface 41 for diffusing the light emitted from the light source part 3 formed on the inner surface. The unevenness 41 may be formed on the outer surface of the cover portion 4, but it is preferable to form it on the inner surface of the cover portion 4 because damage is prevented. In the present embodiment, as the unevenness 41, an unevenness row in which many thin prism shapes are arranged is formed on the inner surface of the cover portion 4. In order to facilitate the forming process, the prism ridgelines of the projections and depressions 41 are parallel to the vertical direction, that is, the symmetry axis of the cover portion 4. An unevenness for diffusing the light emitted from the auxiliary light source unit 6 may be further formed on the bottom of the cover unit 4. Instead of forming the irregularities 41, a light diffusing fine particle layer may be formed on the inner surface of the cover part 4 by coating or the like, or the light diffusing fine particles may be mixed with the base material of the cover part 4. Further, the unevenness 41 may be omitted.

  The back plate 5 is formed by coating a black metal plate and is provided to block outside light around the cover 4 (see FIGS. 2 and 3). As shown in FIG. 7, in the present embodiment, three back plates 5 are provided in a direction equally dividing 360 degrees in a plan view. The number of back plates 5 is not limited to three, and may be two or four. Further, the direction in which the back plate 5 is provided is not limited to the direction equally dividing 360 degrees. By changing the mounting direction of the railroad crossing warning light 1 in the railroad crossing warning device 2, the direction in which the plurality of backplates 5 are provided, that is, the installation angle of the backplate 5 in plan view can be changed at once.

  In the present embodiment, each of the plurality of back plates 5 can change the installation angle θ in plan view. The lower end of the back plate 5 is pivotally supported by the shaft portion 11 so as to be rotatable. As shown in FIG. 8, the back plate 5 has a fixing piece 51 for fixing the vicinity of the upper end to the top plate 12. The fixed piece 51 has an arc-shaped long hole 52. The fixed piece 51 is fixed to the top plate 12 by a screw 53 inserted through the long hole 52. The installation angle of the back plate 5 can be changed with respect to the top plate 12 within the range of the arc angle of the long hole 52. The back plate 5 may be directly fixed to the top plate 12 by welding or the like, omitting such a mechanism for changing the installation angle.

  In the level crossing warning light 1 configured as described above, the light source unit 3 and the auxiliary light source unit 6 are electrically connected to a level crossing control device (not shown). The railroad crossing control device supplies a direct current to the light source unit 3 and the auxiliary light source unit 6 when a train is detected in a predetermined control section on the track. The light source unit 3 and the auxiliary light source unit 6 supplied with the direct current emit light. The light emitted from the light source unit 3 passes through the cover unit 4 and is emitted mainly from the side surface of the cover unit 4 (see FIG. 2). The light emitted from the auxiliary light source unit 6 passes through the cover unit 4 and is emitted mainly from the bottom surface of the cover unit 4. Since light from the light source unit 3 is also emitted obliquely downward, visibility from below is ensured even when the auxiliary light source unit 6 is omitted.

  Since the crossing warning light 1 emits light from the cylindrical light source section 3, it can emit light substantially uniformly around 360 degrees, and the light can be viewed from around 360 degrees. For this reason, the road passer can visually recognize the light emission of the railroad crossing warning light 1 regardless of the intersection angle between the track and the road at the railroad crossing. In addition, the road passer can see not only the railroad crossing warning light 1 in front of the railroad track but also the light emission of the railroad crossing warning light 1 at a position across the railroad track so that the road passer approaches the railroad track. The visibility at the time is improved. Moreover, since the light source part 3 was made into the cylindrical shape, compared with the railroad crossing warning light which has many flat plate-shaped LED boards, a structure is simple.

  A conventional railroad crossing warning light having a circular lens looks circular when viewed from the front. The light emission of the railroad crossing warning light 1 according to the present embodiment is not circular, but may be viewed by a road passer from a predetermined distance, so the light source unit 3 may be cylindrical.

  Since the light source unit 3 is a cylindrical LED substrate, a desired luminance can be obtained depending on the output of each LED 32 and the number of LEDs 32 to be mounted.

  Since the light source unit 3 is formed into a cylindrical shape by bending the flat substrate 31 on which the LEDs 32 are mounted, since the LED 32 is attached when the substrate 31 is a flat plate shape, the cylindrical light source unit 3 is easily provided. The crossing warning light 1 can be manufactured at a low cost.

  Since the base material is a thermoplastic resin, the substrate 31 is plasticized by heating, and thus can be easily formed into a cylindrical shape. Moreover, since the cylindrical shape is maintained at room temperature, the deformation of the light source unit 3 after molding is prevented.

  In addition, if the light source unit 3 is configured by mounting LEDs on two semi-cylindrical rigid substrates, the light source unit 3 is easier to manufacture than mounting the LEDs 32 on a cylindrical rigid substrate.

  Since the cover portion 4 has a bottomed cylindrical shape, it is easier to manufacture than the spherical shape. In addition, since the light emitted from the cylindrical light source unit 3 is transmitted through the cylindrical surface of the cover unit 4, the incident angle to the cover unit 4 is reduced, and reflection at the interface between the cover unit 4 and the air is reduced. Reduced. For this reason, the luminous efficiency of the railroad crossing warning light 1 is increased.

  Since the cover part 4 forms the unevenness 41 on the inner surface, the light emitted from the light source part 3 is diffused by the unevenness 41, so that the light emission of the railroad crossing warning light 1 is further uniformed and glare is prevented. .

  Since each of the plurality of back plates 5 can change the installation angle in plan view, the installation angles of the individual back plates 5 can be adjusted independently. For this reason, it becomes easy to optimize the installation angle of each back plate 5 according to the crossing angle between the track and the road, etc., and the effect of shielding the outside light by the back plate 5 becomes high. Visibility is improved.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, the light source unit 3 may be a cylindrical planar light emitter made of an organic electroluminescence element. Moreover, the translucent cover part 4 is made into a cylindrical shape, and the lower opening may be closed with a metal plate or the like.

1 Railroad crossing warning light 3 Light source 31 Substrate 32 Light emitting diode (LED)
4 Cover part 41 Concavity and convexity 5 Back plate

Claims (7)

A crossing warning light installed at a crossing,
A cylindrical light source,
A bottomed cylindrical and translucent cover that covers the light source;
A plurality of back plates extending radially in plan view outside the cover portion ;
Emission not circular in a side view, crossing warning light, wherein the shape der Rukoto having a straight left and right sides and the upper side.   The railroad crossing warning light according to claim 1, wherein the light source unit includes a cylindrical substrate and a plurality of light emitting diodes arranged in a plane on the substrate.   The railroad crossing warning light according to claim 2, wherein the light source part is formed into a cylindrical shape by bending a flat substrate on which the light emitting diode is mounted.   The railroad crossing warning light according to claim 3, wherein the base material of the substrate is a thermoplastic resin.   The railroad crossing warning light according to claim 2, wherein the light source unit includes two semi-cylindrical rigid boards on which the light emitting diodes are mounted. The railroad crossing warning light according to any one of claims 1 to 5, wherein the cover portion is formed with irregularities for diffusing light emitted from the light source portion on an inner surface or an outer surface. The crossing warning light according to any one of claims 1 to 6, wherein each of the plurality of backboards can be changed in installation angle in plan view.

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