JP7182382B2 - Railroad crossing safety device - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act (1) Date of sale: December 27, 2017 (2) Place of sale: Odakyu Electric Railway Co., Ltd. (1-8-3 Nishi-Shinjuku, Shinjuku-ku, Tokyo) Odakyu Electric Railway Co., Ltd. Hadano Electric System Management Office (1-1 Oohata-cho, Hadano City, Kanagawa Prefecture)

The present invention relates to a railroad crossing safety device.

A railroad crossing obstacle detection device widely used as a railroad crossing safety device has at least one of an incident part for injecting electromagnetic waves such as light and an emission part for emitting electromagnetic waves. It is determined whether or not there is an obstacle between the railroad crossing obstacle detection devices according to whether or not the railroad crossing obstacle detection device having the incident portion can receive the electromagnetic waves.

When it snows heavily, snow adheres to the incident part or the emitting part of the railroad crossing obstacle detection device, blocking the transmission of electromagnetic waves and making it impossible to detect obstacles. For example, Japanese Patent Laid-Open No. 2002-200002 discloses a technique for preventing snow from adhering to an incident portion or an exit portion of a railroad crossing obstacle detection device. Patent Literature 1 describes a railroad crossing obstacle detection device having a snow protection hood arranged in front of an entrance portion or an exit portion.

Japanese Utility Model Laid-Open No. 2-65670

Snow protection hoods must have an opening in the front to allow electromagnetic waves to pass through. Snow may enter the snow protection hood through the opening and adhere to the entrance or exit.

SUMMARY OF THE INVENTION In view of the background described above, the present invention provides means for preventing snow from adhering to the entrance or exit of a railroad crossing safety device.

In order to solve the above-described problems, the present invention provides a wind flow toward the incident part or the emitting part on the lower surface side of the upper surface plate covering the upper front side of the incident part for incident electromagnetic waves or the emitting part for emitting electromagnetic waves. A railroad crossing safety device is provided as a first aspect, which includes a snow protection hood having a wind deflector that changes the air flow.

According to the railroad crossing protection device of the first aspect, adhesion of snow to the entrance portion or the exit portion of the railroad crossing protection device is suppressed.

In the railroad crossing safety device according to the first aspect, the snow protection hood is provided at a position on the lower side of the top plate facing the incident portion or the emitting portion with the wind direction plate interposed therebetween. Alternatively, a configuration in which a front plate is provided with an opening through which an electromagnetic wave emitted from the emitting part passes, the opening having a shape in which the upper side is not closed may be employed as a second aspect. good.

According to the railroad crossing safety device of the second aspect, adhesion of snow to the upper portion of the front plate is suppressed.

In the railroad crossing safety device of the second aspect, the entrance section or the exit section is arranged below the entrance section or the exit section, and the front panel includes the entrance section arranged below the opening in addition to the opening section. A third aspect may employ a configuration in which an opening is provided through which an electromagnetic wave incident on the portion or an electromagnetic wave emitted from the emitting portion disposed below passes through.

According to the railroad crossing safety device of the third aspect, even if the railroad crossing safety device has a plurality of entrance portions or exit portions, adhesion of snow to each of the plurality of entrance portions or exit portions is suppressed.

1A and 1B are a side view and a cross-sectional view of a railroad crossing protection device according to an embodiment; FIG. 1A and 1B are a front view and a perspective view of a railroad crossing protection device according to an embodiment; FIG. The figure which showed the structure of the railroad crossing protection apparatus which concerns on a comparative example.

[Embodiment]
A railroad crossing safety device 1 according to an embodiment of the present invention will be described below. 1 and 2 are diagrams showing the configuration of the railroad crossing safety device 1. FIG. FIG. 1(A) is a side view of the railroad crossing safety device 1, and FIG. 1(B) is a side cross-sectional view of the railroad crossing safety device 1 taken along a vertical plane extending in the longitudinal direction of the railroad crossing safety device 1. FIG. be. 2(A) is a front view of the railroad crossing protection device 1, FIG. 2(B) is a view of the railroad crossing protection device 1 as viewed obliquely from above, and FIG. 2(C) is a view with the snow protection hood 12 removed. 1 is a front view of a railroad crossing safety device 1; FIG.

The railroad crossing protection device 1 includes a main body 11 and a snow protection hood 12 arranged in front of the main body 11. - 特許庁

The main body 11 has two incident portions, namely an incident portion 111a and an incident portion 111b. The incident part 111a and the incident part 111b receive electromagnetic waves emitted from another railroad crossing security device having an emitting part and convert them into electrical signals. The types of electromagnetic waves received by the incident portions 111a and 111b may be any of infrared rays, laser light, microwaves, millimeter waves, visible light, etc., as long as the objects can be detected. The railroad crossing protection device having an emission part has the same configuration as the railroad crossing protection device 1 except that it has two emission parts for emitting electromagnetic waves instead of the incidence part 111a and the incidence part 111b. A configuration in which the railroad crossing safety device 1 includes an emission portion instead of one of the incidence portion 111a and the incidence portion 111b may be employed.

The railroad crossing protection device 1 and the railroad crossing protection device having the output portion are arranged such that the incident portion and the output portion face each other on a diagonal line when the target area of the railroad crossing is viewed from above.

A lens 112a is arranged on the front side of the incident portion 111a, and a lens 112b is arranged on the front side of the incident portion 111b. The lenses 112a and 112b collect incident electromagnetic waves and guide them to the incident portion 111a or the incident portion 111b. In addition, in the railroad crossing safety device having an emission part instead of the incidence part 111a and the incidence part 111b, the electromagnetic wave emitted from the emission part is diffused by the lens 112a or the lens 112b.

A resin case 113 is provided in front of the lens 112a and the lens 112b. A transparent heater glass 114 is provided inside the resin case 113 . A transparent conductive film that generates heat when energized is formed on the surface of the heater glass 114 . A packing 115 is provided on the front side of the heater glass 114 in the resin case 113 to seal the periphery of the heater glass 114 . A pressing plate 116 is provided on the front surface of the packing 115, and a member provided behind the pressing plate 116 is fixed. The resin case 113, the packing 115, and the pressing plate 116 are provided with openings at positions corresponding to the positions of the lenses 112a and 112b. This opening will be described later.

A snow protection hood 12 is attached to the front side of the holding plate 116 . The snow protection hood 12 has a top plate 121 that covers the upper front surface of the main body 11, side plates 122 that cover the left and right direction, and a front plate 123 that covers the front side. The snow protection hood 12 does not have a plate member or the like that covers the lower surface side, and has a structure that extends downward.

A roof 124 is provided above the top plate 121 . The roof 124 has slopes that descend toward the side plates 122 on both sides. With these slopes, the snow falling on the roof 124 slides toward the side plates 122 and easily falls to the ground.

The front plate 123 is inclined downward from the tip of the upper plate 121 toward the rear. The front plate 123 is provided with an opening 123a and an opening 123b arranged vertically. The opening 123a is provided at a position corresponding to the lens 112a, and an electromagnetic wave incident from the front passes through the opening 123a, reaches the lens 112a, and is incident on the incident portion 111a. Similarly, the opening 123b is provided at a position corresponding to the lens 112b, and the electromagnetic wave passing through the opening 123b reaches the lens 112b and is incident on the incident portion 111b.

The opening 123b has a substantially circular shape when viewed from the front. The opening 123 a has an arc shape on the lower side and a shape that extends toward the upper side of the front plate 123 on the upper side. That is, the upper side of the front plate 123 is not closed.

A wind direction plate 125 is provided on the lower surface side of the upper surface plate 121 so as to protrude downward. The wind direction plate 125 is provided at a position close to the upper side of the front plate 123 of the top plate 121 and is inclined downward toward the rear with respect to the bottom surface of the top plate 121 .

The wind direction plate 125 blocks the upper side of the opening 123a when viewed from the front, but its size is adjusted so as not to block electromagnetic waves entering from the opening 123a and reaching the lens 112a. In addition, the wind direction plate 125 extends to a position in contact with the side plates 122 on both sides in the left-right direction.

A pressing plate 116 on the front side of the railroad crossing safety device 1 is provided with an opening 116a and an opening 116b. The opening 116a is provided at a position corresponding to the lens 112a, and the opening 116b is provided at a position corresponding to the lens 112b. The surface of the heater glass 114 in the resin case 113 is exposed to the outside through the openings 116a and 116b. Electromagnetic waves passing through the openings 123a and 123b of the front plate 123 are incident on the heater glass surfaces 114a and 114b. Hereinafter, the heater glass surface 114a and the heater glass surface 114b are referred to as "incident surfaces".

In a railroad crossing safety device having two emitting portions instead of the incident portion 111a and the incident portion 111b, the electromagnetic waves emitted from the heater glass surface 114a and the heater glass surface 114b are emitted from the opening 123a of the front plate 123 and the opening 123b. The light passes through the portion 123b and is emitted to the outside. In this case, the heater glass surface 114a and the heater glass surface 114b are called "outgoing surfaces".

In the present application, adhesion of snow to the incident surface is synonymous with adhesion of snow to the incident portion. Adherence of snow to the exit surface is synonymous with adhesion of snow to the incident portion.

A front surface 116c of the holding plate 116 without the openings 116a and 116b is closer to the front side than the heater glass surfaces 114a and 114b because the holding plate 116 is thick. Accordingly, there is a step between the edge of the heater glass surface 114a and the heater glass surface 114b and the front surface 116c of the pressing plate 116. As shown in FIG. Snow falling from the front tends to adhere to these steps. Therefore, it is preferable to reduce the thickness of the pressing plate 116 within a range in which the required strength is ensured to reduce the step.

The flow of wind blowing into the snow protection hood 12 will be described with reference to FIG. 1(B). A front plate 123 provided on the snow protection hood 12 prevents snow from entering the snow protection hood 12 . However, when a strong wind blows from the front to the rear during heavy snowfall, snow enters the snow protection hood 12 through the openings 123a and 123b.

The airflow A caused by the wind from the front flows into the snow protection hood 12 from the opening 123a in the upper part of the front panel 123. As shown in FIG. The airflow B flows into the snow protection hood 12 from the opening 123b at the bottom of the front panel 123. As shown in FIG. Since the airflow C flows into the portion between the openings 123 a and 123 b of the front plate 123 , the wind direction is changed downward by the front plate 123 and does not flow into the snow protection hood 12 .

Of the airflow A that has flowed into the snow protection hood 12 from the opening 123a, the airflow that has flowed from the upper side of the opening 123a collides with the wind direction plate 125 . Then, it becomes an air current D that flows downward inside the snow protection hood 12 . Due to the generation of such a downwardly flowing airflow D, most of the airflows A and B flowing into the snow protection hood 12 from the openings 123a and 123b are directed downward. As a result, the snow that has entered the snow protection hood 12 along with the airflows A and B moves downward and exits the snow protection hood 12 . As a result, the amount of snow that reaches the heater glass surface 114a and the heater glass surface 114b is reduced, and adhesion of snow to the entrance surface (or exit surface) is suppressed.

Note that the longer the length of the snow protection hood 12 in the front-rear direction (the left-right direction in FIG. 1), the higher the snow protection effect. That is, the length from the wind direction plate 125 to the incident surface or the exit surface can be increased, and the space in the snow protection hood 12 where the downward airflow D is weak can be increased. As a result, it is possible to further reduce snow reaching the entrance surface or the exit surface. Therefore, it is preferable to increase the length of the snow protection hood 12 within a range that does not affect the installation space, the mounting strength, and the like.

Next, a railroad crossing safety device 1H according to a comparative example will be described. FIG. 3 is a diagram showing the configuration of a railroad crossing safety device 1H according to a comparative example. FIG. 3(A) is a cross-sectional view of the railroad crossing protection device 1H viewed from the side, and FIG. 3(B) is a view of the railroad crossing protection device 1H viewed obliquely from above.

In the railroad crossing safety device 1H, the same reference numerals are given to the structural members having the same functions as the structural members of the railroad crossing safety device 1 shown in FIGS. The pressing plate 116H of the railroad crossing protection device 1H is thicker than the pressing plate 116 of the railroad crossing protection device 1H.

The snow protection hood 12H attached to the front surface of the main body 11H of the railroad crossing safety device 1H does not have the front plate 123, the roof 124, and the wind direction plate 125 unlike the snow protection hood 12 according to this embodiment.

The flow of wind blowing into the snow protection hood 12H will be described with reference to FIG. 3(A). As shown in FIG. 3A, the airflow E caused by the wind from the front flows into the snow protection hood 12H. Unlike the snow protection hood 12 according to the present embodiment, the snow protection hood 12H is not provided with the front plate 123 and the wind direction plate 125. Therefore, the airflow E goes straight through the snow protection hood 12H without being changed, and reaches the heater glass. It reaches the surface 114a or the heater glass surface 114b. Therefore, part of the snow that has entered the snow protection hood 12H together with the airflow E reaches and adheres to the entrance surface (or exit surface).

Further, since the presser plate 116H of the railroad crossing safety device 1H is thicker than the presser plate 116 of the railroad crossing safety device 1 according to the present embodiment, the front surface 116Hc of the presser plate 116H on each side of the heater glass surface 114a and the heater glass surface 114b is increased. There is a big gap between Therefore, snow tends to adhere to this step portion.

[Modification]
Various modifications can be made to the embodiments described above. Examples of these variations are given below. In addition, the embodiment described above and the modifications described below may be appropriately combined.

(1) In the above-described embodiment, the railroad crossing safety device 1 is configured to include two entrance portions or two exit portions, but the present invention is not limited to this. It may be one entrance section or one exit section. Alternatively, it may be configured to have one entrance portion and one exit portion. Also, the number of incident portions or emitting portions may be three or more.

(2) In the above-described embodiments, the incident portions or the emitting portions are arranged in the vertical direction, but they may be arranged in the horizontal direction.

(3) In the above-described embodiment, the holding plate 116 has two openings 116a and 116b at positions corresponding to the two lenses 112a and 112b. Not limited. A configuration may be adopted in which a plate portion near the center that separates the two openings 116a and 116b is removed to provide one vertically elongated opening. By adopting such a configuration, it is possible to further prevent snow from adhering to the entrance surface or the exit surface on the upper side.

(4) In the above-described embodiment, a device for detecting obstacles in a railroad crossing was used as an example of a railroad crossing protection device, but the present invention is not limited to this, and may be applied to other railroad crossing protection devices.

DESCRIPTION OF SYMBOLS 1... Railroad crossing protection apparatus 11... Main body 12... Snow protection hood 111a, 111b... Entrance part, 112a, 112b... Lens, 113... Resin case, 114... Heater glass, 114a, 114b... Heater glass surface, 115... Packing, 116... Retainer plate, 121... Top plate, 122... Side plate, 123... Front plate, 124... Roof, 125... Wind direction plate.

Claims (3)

A snow protection hood having a wind direction plate that changes the flow of wind toward the incident part or the emitting part only on the lower surface side of the top plate covering the upper front side of the incident part for incident electromagnetic waves or the emitting part for emitting electromagnetic waves ,
The wind direction plate extends above a position where the electromagnetic waves are incident and emitted.
Railroad crossing security device. The snow protection hood directs electromagnetic waves incident on the incident part or electromagnetic waves emitted from the emitting part to a position on the lower side of the upper plate facing the incident part or the emitting part with the wind direction plate interposed therebetween. 2. The railroad crossing safety device according to claim 1, further comprising a front plate provided with an opening through which the vehicle passes, the opening having an upper side that is not closed. having an incident portion or an exit portion arranged below the incident portion or the exit portion;
3. The front plate according to claim 2, wherein in addition to the opening, the front plate has an opening through which an electromagnetic wave incident on the incident portion arranged below or an electromagnetic wave emitted from the emitting portion arranged below passes. railroad crossing security device.

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