JP7271399B2

JP7271399B2 - Auxiliary scaffold

Info

Publication number: JP7271399B2
Application number: JP2019209291A
Authority: JP
Inventors: 真理子阿久津; 東樹宇田; 義博藤井
Original assignee: Railway Technical Research Institute; East Japan Railway Co
Current assignee: Railway Technical Research Institute; East Japan Railway Co
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2023-05-11
Anticipated expiration: 2039-11-20
Also published as: JP2021079838A

Description

本発明は、新幹線などの高速鉄道車両に取り付けられる補助排障器に関し、特に走行速度が高速化することによって発生する空力音を低減することができる補助排障器に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary obstacle guard to be attached to a high-speed railway vehicle such as Shinkansen, and more particularly to an auxiliary obstacle guard capable of reducing aerodynamic noise generated as the running speed increases.

従来、鉄道車両が走行するレール上に異物が存在する場合に、当該異物を取り除くことを目的として鉄道車両の先端の下部や鉄道車両の先端面の下部に設置されるスノープラウに補助排障器が取り付けられている。 Conventionally, when there is foreign matter on the rail on which the railway vehicle runs, the snow plow is installed at the bottom of the front end of the railway vehicle or at the bottom of the front end surface of the railway vehicle for the purpose of removing the foreign matter. is installed.

補助排障器は、スノープラウからレールに向かって延設され、レールの上面との間に所定の間隔を有するように設置されたゴム板状の部材であり、レール上に異物などが存在する場合に、補助排障器がレール上の異物をレール外にはじき出すなどして当該異物をレール上から取り除いている。 The auxiliary obstacle guard is a rubber plate-shaped member that extends from the snow plow toward the rail and is installed with a predetermined gap from the upper surface of the rail, and foreign objects, etc., are present on the rail. In such a case, the foreign matter on the rail is removed from the rail by, for example, pushing the foreign matter on the rail out of the rail.

特開２００９－１８４３８０号公報JP 2009-184380 A

しかし、従来の補助排障器は、スノープラウの前縁に沿った板状の形状となっている。この形状によって、鉄道車両が高速で走行すると、高速の気流にさらされることで空力音が発生し、当該空力音が騒音問題に繋がる可能性があるという問題があった。 However, the conventional auxiliary scaffolding device has a plate-like shape along the front edge of the snow plow. Due to this shape, when a railroad vehicle runs at high speed, it is exposed to high-speed air currents and generates aerodynamic noise, which may lead to noise problems.

そこで、本発明は上記問題に鑑みてなされたものであり、補助排障器で発生する空力音を低減すると共に、鉄道車両やスノープラウ自体の変更を伴うことなく、従来の鉄道車両に適用可能な補助排障器を提供することを目的とする。 Therefore, the present invention has been made in view of the above problems, and can reduce the aerodynamic noise generated by the auxiliary scaffold, and can be applied to conventional railway vehicles without changing the railway vehicles and snow plows themselves. It is an object of the present invention to provide an assistive scavenger.

上記課題を解決するために、本発明に係る補助排障器は、鉄道車両先端の下部又は、鉄道車両の先端面の下部に配設されるスノープラウに取り付けられる補助排障器であって、当該補助排障器は、前記鉄道車両の下部又は前記スノープラウに取り付けられる取付部と、前記取付部から下方に延びる排障部とを有し、前記排障部は、前記スノープラウ又は前記鉄道車両の底面に沿って延設される厚肉部を有し、前記厚肉部は、前記排障部の延設方向と略直交する方向に延設されると共に、前記排障部の延設方向の両端から延びる側面を有することを特徴とする。 In order to solve the above-mentioned problems, an auxiliary baffle according to the present invention is an auxiliary baffle that is attached to a snow plow disposed under the front end of a railroad vehicle or under the front end surface of a railroad vehicle, The auxiliary obstacle guard has a mounting portion attached to the lower portion of the railway vehicle or the snow plow, and an obstacle guard portion extending downward from the mounting portion, and the obstacle guard portion is attached to the snow plow or the railway. The vehicle has a thick portion extending along the bottom surface of the vehicle, the thick portion extending in a direction substantially orthogonal to the extending direction of the obstruction-relief portion, and extending from the obstruction-relief portion. It is characterized by having side surfaces extending from both ends of the direction .

また、本発明に係る補助排障器において、前記厚肉部は、前記側面同士が漸次近接するように連続する斜面を有すると好適である。 Moreover, in the auxiliary obstacle protector according to the present invention , it is preferable that the thick portion has a continuous slope so that the side surfaces gradually approach each other.

また、本発明に係る補助排障器において、前記排障部及び前記厚肉部は、前記鉄道車両の先端側に傾斜する先端側傾斜面を有すると好適である。 Further, in the auxiliary obstacle-relief device according to the present invention, it is preferable that the obstacle-relief portion and the thick-walled portion have a front end-side inclined surface that is inclined toward the front end of the railway vehicle.

また、本発明に係る補助排障器において、前記厚肉部は、前記底面に対して傾斜する底面側傾斜面を有すると好適である。 Moreover, in the auxiliary obstacle guard according to the present invention, it is preferable that the thick portion has a bottom-side inclined surface that is inclined with respect to the bottom surface.

また、本発明に係る補助排障器において、前記底面側傾斜面は、前記排障部の下端から延設されると好適である。 Further, in the auxiliary obstacle-relief device according to the present invention, it is preferable that the bottom-side inclined surface extends from the lower end of the obstacle-relief portion.

本発明に係る補助排障器は、スノープラウに取り付けられる取付部と、取付部から下方に延びる排障部とを有し、排障部は、スノープラウ又は鉄道車両の底面に沿って延設される厚肉部を有するので、厚肉部によって補助排障器前縁における渦の放出及び巻き込みを弱めることができ、空力音を低減させることができる。また、スノープラウへの取付部は従来と同様の形状とすることができるので、スノープラウに変更を加えることなく空力音の低減を図ることが可能となる。 The auxiliary obstacle guard according to the present invention has an attachment portion attached to the snow plow and an obstacle relief portion extending downward from the attachment portion, and the obstacle relief portion extends along the bottom surface of the snow plow or the railway vehicle. Therefore, the thick portion can weaken the shedding and entrainment of the vortex at the leading edge of the auxiliary baffle, and the aerodynamic noise can be reduced. In addition, since the attachment portion to the snow plow can have the same shape as the conventional one, it is possible to reduce the aerodynamic noise without modifying the snow plow.

本発明の第１の実施形態に係る補助排障器を取り付けた鉄道車両の斜視図。1 is a perspective view of a railroad vehicle equipped with an auxiliary obstacle guard according to a first embodiment of the present invention; FIG. 本発明の第１の実施形態に係る補助排障器を取り付けた鉄道車両の底面図。FIG. 2 is a bottom view of the railcar to which the auxiliary obstacle guard according to the first embodiment of the present invention is attached; 本発明の第１の実施形態に係る補助排障器の斜視図。BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the auxiliary|assistant restrainer which concerns on the 1st Embodiment of this invention. 本発明の第２の実施形態に係る補助排障器を取り付けた鉄道車両の底面図。FIG. 11 is a bottom view of a railroad vehicle equipped with an auxiliary obstacle guard according to a second embodiment of the present invention; 本発明の第２の実施形態に係る補助排障器の拡大斜視図。FIG. 11 is an enlarged perspective view of an auxiliary obstacle guard according to a second embodiment of the present invention; 本発明の第３の実施形態に係る補助排障器の拡大斜視図。FIG. 11 is an enlarged perspective view of an auxiliary obstacle deflector according to a third embodiment of the present invention; 本発明の第４の実施形態に係る補助排障器の拡大斜視図。FIG. 11 is an enlarged perspective view of an auxiliary obstacle guard according to a fourth embodiment of the present invention; 本発明の各実施形態に係る補助排障器の消音効果を確認した測定結果。Measurement results confirming the silencing effect of the auxiliary restraining device according to each embodiment of the present invention. 本発明の各実施形態に係る補助排障器の消音効果を確認した測定結果。Measurement results confirming the silencing effect of the auxiliary restraining device according to each embodiment of the present invention.

以下、本発明を実施するための好適な実施形態について、図面を用いて説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。 Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. In addition, the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the solution of the invention. .

［第１の実施形態］
図１は、本発明の第１の実施形態に係る補助排障器を取り付けた鉄道車両の斜視図であり、図２は、本発明の第１の実施形態に係る補助排障器を取り付けた鉄道車両の底面図であり、図３は、本発明の第１の実施形態に係る補助排障器の斜視図である。 [First Embodiment]
FIG. 1 is a perspective view of a railway vehicle to which an auxiliary restrainer according to the first embodiment of the present invention is attached, and FIG. FIG. 3 is a bottom view of the railway vehicle, and FIG. 3 is a perspective view of the auxiliary obstacle scavenger according to the first embodiment of the present invention.

図１に示すように、本実施形態に係る補助排障器１０は、鉄道車両１の先端面の下部に配設されるスノープラウ２に取り付けられる。補助排障器１０は、スノープラウ２に取り付けられた状態でレール３と所定の間隔を有して配置されており、レール３上に鉄道車両の走行の支障となるような障害物が載置されている場合に、当該障害物をレール３外に弾き飛ばし、鉄道車両１の車輪とレール３の間に障害物が噛みこむことで、鉄道車両１の走行の支障となることを防止している。 As shown in FIG. 1 , an auxiliary baffle 10 according to the present embodiment is attached to a snow plow 2 that is arranged below the front end surface of a railroad vehicle 1 . The auxiliary obstacle guard 10 is mounted on the snow plow 2 and arranged at a predetermined distance from the rail 3, and an obstacle that hinders the running of the railroad vehicle is placed on the rail 3. In this case, the obstacle is flipped out of the rail 3 to prevent the obstacle from getting caught between the wheel of the railroad vehicle 1 and the rail 3, thereby preventing the travel of the railroad vehicle 1 from being hindered. there is

図１及び２に示すように、本実施形態に係る補助排障器１０は、スノープラウ２に取り付けられる取付部１１と、取付部１１から下方に延びると共にレール３から所定の間隔をもって配置される排障部１２と、スノープラウ２又は鉄道車両１の底面に沿って延設される厚肉部１３を有している。 As shown in FIGS. 1 and 2, the auxiliary scaffold 10 according to this embodiment includes a mounting portion 11 mounted on the snow plow 2, and a mounting portion 11 extending downward from the mounting portion 11 and arranged at a predetermined distance from the rail 3. It has an obstructing part 12 and a thick part 13 extending along the bottom surface of the snow plow 2 or the railcar 1 .

本実施形態に係る補助排障器１０は、スノープラウ２の先端側にレール３に対応するように一対取り付けられており、切妻状に形成されたスノープラウ２の外縁に沿って進行方向Ｆに対して所定の角度傾斜した略ハの字に配置されている。 A pair of auxiliary obstacle guards 10 according to the present embodiment are attached to the tip side of the snow plow 2 so as to correspond to the rail 3, and extend in the traveling direction F along the outer edge of the snow plow 2 formed in a gable shape. It is arranged in a substantially V shape inclined at a predetermined angle.

図３に示すように、本実施形態に係る補助排障器１０は、ゴム等の弾性体で構成されると好適であり、一体に形成された部材であって、スノープラウ２に取り付ける取付部１１と取付部１１から下方に延びる排障部１２とを有している。取付部１１には、取付孔１４が形成され、当該取付孔１４にボルトなどの締結手段を挿通することで補助排障器１０の取り付けを行っている。 As shown in FIG. 3 , the auxiliary baffle 10 according to the present embodiment is preferably made of an elastic material such as rubber, and is an integrally formed member having a mounting portion attached to the snow plow 2 . 11 and an obstacle guarding portion 12 extending downward from the mounting portion 11 . A mounting hole 14 is formed in the mounting portion 11 , and a fastening means such as a bolt is inserted through the mounting hole 14 to mount the auxiliary obstacle guard 10 .

なお、取付部１１及び排障部１２は、スノープラウ２の形状に沿うように、進行方向前方から見た状態で鉛直方向から所定の角度傾斜しており、一対の補助排障器１０は、進行方向前方から見た状態でも略ハの字に配置されている。 In addition, the attachment portion 11 and the obstruction guard portion 12 are inclined at a predetermined angle from the vertical direction when viewed from the front in the traveling direction so as to follow the shape of the snow plow 2, and the pair of auxiliary obstruction guards 10 are Even when viewed from the front in the direction of travel, they are arranged in a substantially inverted V shape.

図２に示すように、排障部１２は、一対の補助排障器１０の対向する方向に向かって突出するように厚肉部１３が形成されている。図３に示すように、厚肉部１３は、排障部１２の延設方向と略直交する方向に延設されると共に、排障部１２の延設方向の両端から延びる側面２１と、側面２１の一端から側面２１同士が漸次近接するように連続する斜面２２とを有した形状となっている。 As shown in FIG. 2, the obstacle removing portion 12 is formed with a thick portion 13 so as to protrude in the direction in which the pair of auxiliary obstacle removing devices 10 face each other. As shown in FIG. 3, the thick portion 13 extends in a direction substantially orthogonal to the extending direction of the obstruction-relief portion 12, and has side surfaces 21 extending from both ends of the obstruction-relief portion 12 in the extending direction. It has a shape having a continuous slope 22 from one end of 21 so that the side surfaces 21 gradually approach each other.

このように、本実施形態に係る補助排障器１０は、排障部１２の背面（互いの補助排障器１０が対向する面）に厚肉部１３を形成することで厚みを持たせた形状となり、鉄道車両の走行に伴って当該厚肉部１３によって補助排障器１０の前縁において生じる渦の放出や巻き込みを弱めることができ、当該渦による空力音の低減を図ることが可能となる。また、本実施形態に係る補助排障器１０によれば、鉄道車両やスノープラウ自体の変更を伴うことなく、従来の鉄道車両に適用可能な補助排障器１０を提供することができる。 As described above, the auxiliary obstacle-relief device 10 according to the present embodiment is thickened by forming the thick-walled portion 13 on the rear surface of the obstacle-removing portion 12 (the surface facing each other). The thick portion 13 can weaken the discharge and entrainment of vortices generated at the front edge of the auxiliary obstacle guard 10 as the railway vehicle runs, and can reduce the aerodynamic noise caused by the vortices. Become. Further, according to the auxiliary baffle 10 according to the present embodiment, it is possible to provide the auxiliary baffle 10 that can be applied to a conventional railroad vehicle without changing the railroad vehicle or the snow plow itself.

［第２の実施形態］
以上説明した第１の実施形態に係る補助排障器１０は、厚肉部１３を側面２１と斜面２２とを有する形状である場合について説明を行った。次に説明する第２の実施形態に係る補助排障器１０ａは、第１の実施形態とは異なる形態を有する厚肉部の実施例について説明を行うものである。なお、上述した第１の実施形態の場合と同一又は類似する部材については、同一符号を付して詳細な説明を省略する。 [Second embodiment]
In the above-described auxiliary baffle 10 according to the first embodiment, the case where the thick portion 13 has the side surface 21 and the slope 22 has been described. An auxiliary obstacle scavenger 10a according to a second embodiment, which will be described next, is an example of a thick portion having a shape different from that of the first embodiment. Members that are the same as or similar to those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

図４は、本発明の第２の実施形態に係る補助排障器を取り付けた鉄道車両の底面図であり、図５は、本発明の第２の実施形態に係る補助排障器の拡大斜視図である。 FIG. 4 is a bottom view of a railway vehicle fitted with an auxiliary restraint system according to a second embodiment of the invention, and FIG. 5 is an enlarged perspective view of the auxiliary restraint system according to the second embodiment of the invention. It is a diagram.

図４に示すように、本実施形態に係る補助排障器１０ａは、第１の実施形態に係る補助排障器１０と同様に排障部１２の背面に厚肉部１３ａが形成されている。本実施形態に係る補助排障器１０ａの排障部１２及び厚肉部１３ａは、鉄道車両の先端側に傾斜する先端側傾斜面２３，２４を有している。 As shown in FIG. 4, in the auxiliary obstacle-relief device 10a according to the present embodiment, a thick portion 13a is formed on the rear surface of the obstacle-removing portion 12 in the same manner as the auxiliary obstacle-removing device 10 according to the first embodiment. . The obstacle removing portion 12 and the thick portion 13a of the auxiliary obstacle removing device 10a according to the present embodiment have tip side inclined surfaces 23 and 24 that are inclined toward the tip side of the railway vehicle.

図５に示すように、本実施形態に係る補助排障器１０ａの厚肉部１３ａは、排障部１２の延設方向と略直交する方向に延設されると共に、排障部１２の延設方向の後端側から延びる側面２１と、排障部１２の先端側及び側面２１の一端から延びると共に漸次近接するように連続する斜面２２とを有した形状となっている。さらに、厚肉部１３ａの先端側は、先端側傾斜面２３が形成されており、同様に排障部１２の先端側も先端側傾斜面２３と対応するように傾斜面２４が形成されている。 As shown in FIG. 5, the thick portion 13a of the auxiliary obstacle-relief device 10a according to the present embodiment extends in a direction substantially orthogonal to the extending direction of the obstacle-relief portion 12, It has a shape having a side surface 21 extending from the rear end side in the installation direction and a continuous slope 22 extending from the front end side of the obstruction relief portion 12 and one end of the side surface 21 and gradually approaching the side surface 21 . Further, a tip end inclined surface 23 is formed on the tip end side of the thick portion 13a, and an inclined face 24 is also formed on the tip end side of the obstruction relief portion 12 so as to correspond to the tip end inclined face 23. .

このように、本実施形態に係る補助排障器１０ａは、厚肉部１３ａの先端側に先端側傾斜面２３，２４を形成しているので、鉄道車両の走行に伴って当該厚肉部１３ａや先端側傾斜面２３，２４によって補助排障器１０ａの前縁において生じる渦の放出や巻き込みを弱めることができ、当該渦による空力音の低減を図ることが可能となる。また、本実施形態に係る補助排障器１０ａによれば、鉄道車両やスノープラウ自体の変更を伴うことなく、従来の鉄道車両に適用可能な補助排障器１０ａを提供することができる。 As described above, in the auxiliary obstacle guard 10a according to the present embodiment, the tip-side inclined surfaces 23 and 24 are formed on the tip side of the thick-walled portion 13a. The slanted surfaces 23 and 24 on the tip end side can weaken the shedding and entrainment of the vortex generated at the front edge of the auxiliary obstacle shield 10a, and it is possible to reduce the aerodynamic noise caused by the vortex. Further, according to the auxiliary baffle 10a according to the present embodiment, it is possible to provide the auxiliary baffle 10a that can be applied to conventional railway vehicles without changing the railway vehicle or the snow plow itself.

［第３の実施形態］
以上説明した第２の実施形態に係る補助排障器１０ａは、厚肉部１３ａの先端側に先端側傾斜面２３、２４を有する形状である場合について説明を行った。次に説明する第３の実施形態に係る補助排障器１０ｃは、第１及び第２の実施形態とは異なる形態を有する厚肉部の実施例について説明を行うものである。なお、上述した第１及び第２の実施形態の場合と同一又は類似する部材については、同一符号を付して詳細な説明を省略する。 [Third Embodiment]
The case where the auxiliary obstruction protector 10a according to the second embodiment described above has the distal end side inclined surfaces 23 and 24 on the distal end side of the thick portion 13a has been described. An auxiliary obstruction scavenger 10c according to a third embodiment to be described next describes an example of a thick portion having a shape different from those of the first and second embodiments. Members that are the same as or similar to those in the first and second embodiments described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

図６は、本発明の第３の実施形態に係る補助排障器の拡大斜視図である。 FIG. 6 is an enlarged perspective view of an auxiliary restraint system according to a third embodiment of the present invention.

図６に示すように、本実施形態に係る補助排障器１０ｃは、第１及び２の実施形態に係る補助排障器１０，１０ａと同様に排障部１２の背面に厚肉部１３ｃが形成されている。 As shown in FIG. 6, the auxiliary obstacle-relief device 10c according to this embodiment has a thick-walled portion 13c on the rear surface of the obstacle-removing portion 12, like the auxiliary obstacle-removing devices 10 and 10a according to the first and second embodiments. formed.

本実施形態に係る補助排障器１０ｃの厚肉部１３ｃは、排障部１２の延設方向と略直交する方向に延設されると共に、排障部１２の延設方向の両端から延びる側面２１と、排障部１２の下端から延設される底面側傾斜面２５とを有した形状となっている。このように、本実施形態に係る補助排障器１０ｃは、第１及び第２の実施形態に係る補助排障器１０，１０ａとは異なり、側面２１から連続する斜面２２が形成されておらず、底面側傾斜面２５は、側面２１に沿って延設されている。 The thick portion 13c of the auxiliary obstacle-relief device 10c according to the present embodiment extends in a direction substantially orthogonal to the extending direction of the obstruction-relief portion 12, and has side surfaces extending from both ends of the obstruction-relief portion 12 in the extending direction. 21 and a bottom-side inclined surface 25 extending from the lower end of the obstruction-relief portion 12 . As described above, unlike the auxiliary obstacle-relief devices 10 and 10a according to the first and second embodiments, the auxiliary obstacle-removing device 10c according to the present embodiment does not have the inclined surface 22 continuous from the side surface 21. , the bottom-side inclined surface 25 extends along the side surface 21 .

このように、本実施形態に係る補助排障器１０ｃは、厚肉部１３ｃの底面側に底面側傾斜面２５を形成しているので、鉄道車両の走行に伴って当該厚肉部１３や底面側傾斜面２５によって補助排障器１０ｃの前縁において生じる渦の放出や巻き込みを弱めることができ、当該渦による空力音の低減を図ることが可能となる。また、本実施形態に係る補助排障器１０ｃによれば、鉄道車両やスノープラウ自体の変更を伴うことなく、従来の鉄道車両に適用可能な補助排障器１０ｃを提供することができる。 As described above, the auxiliary obstacle escaper 10c according to the present embodiment forms the bottom-side inclined surface 25 on the bottom side of the thick-walled portion 13c. The side inclined surface 25 can weaken the shedding and entrainment of the vortex generated at the front edge of the auxiliary obstacle shield 10c, making it possible to reduce the aerodynamic noise caused by the vortex. Further, according to the auxiliary baffle 10c according to the present embodiment, it is possible to provide the auxiliary baffle 10c that can be applied to conventional railway vehicles without changing the railway vehicle or the snow plow itself.

［第４の実施形態］
以上説明した第３の実施形態に係る補助排障器１０ｃは、厚肉部１３ｃの底面側に底面側傾斜面２５を有する形状である場合について説明を行った。次に説明する第４の実施形態に係る補助排障器１０ｄは、第１～第３の実施形態とは異なる形態を有する厚肉部の実施例について説明を行うものである。なお、上述した第１から第３の実施形態の場合と同一又は類似する部材については、同一符号を付して詳細な説明を省略する。 [Fourth embodiment]
The case where the auxiliary obstacle guard 10c according to the third embodiment described above has a shape having the bottom surface side inclined surface 25 on the bottom surface side of the thick portion 13c has been described. An auxiliary obstruction scavenger 10d according to a fourth embodiment, which will be described next, will be described as an example of a thick portion having a shape different from those of the first to third embodiments. Members that are the same as or similar to those in the first to third embodiments described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

図７は、本発明の第４の実施形態に係る補助排障器の拡大斜視図である。 FIG. 7 is an enlarged perspective view of an auxiliary restraint system according to a fourth embodiment of the present invention.

図７に示すように、本実施形態に係る補助排障器１０ｄは、第１～第３の実施形態に係る補助排障器１０，１０ａ，１０ｃと同様に排障部１２の背面に厚肉部１３ｄが形成されている。 As shown in FIG. 7, the auxiliary obstacle-relief device 10d according to the present embodiment has a thick wall on the rear surface of the obstacle-removing part 12, similar to the auxiliary obstacle-relief devices 10, 10a, and 10c according to the first to third embodiments. A portion 13d is formed.

本実施形態に係る補助排障器１０ｄの厚肉部１３ｄは、補助排障器１０ｄの延設方向に沿って、先端側から後端側に向かって漸次厚みが増加するように形成されている。 The thick portion 13d of the auxiliary obstacle protector 10d according to the present embodiment is formed so that the thickness gradually increases from the front end side to the rear end side along the extension direction of the auxiliary obstacle protector 10d. .

このように、本実施形態に係る補助排障器１０ｄは、補助排障器１０ｄ自体を先端側から後端側に向かって漸次厚みが増加するように形成しているので、鉄道車両の走行に伴って補助排障器１０ｄの前縁において生じる渦の放出や巻き込みを弱めることができ、当該渦による空力音の低減を図ることが可能となる。また、本実施形態に係る補助排障器１０ｄによれば、鉄道車両やスノープラウ自体の変更を伴うことなく、従来の鉄道車両に適用可能な補助排障器１０ｄを提供することができる。 As described above, the auxiliary obstacle guard 10d according to the present embodiment is formed so that the thickness of the auxiliary obstacle guard 10d itself increases gradually from the front end side to the rear end side. Along with this, it is possible to weaken the shedding and entrainment of the vortex generated at the front edge of the auxiliary barrier 10d, and it is possible to reduce the aerodynamic noise caused by the vortex. Further, according to the auxiliary obstacle guard 10d according to the present embodiment, it is possible to provide the auxiliary obstacle guard 10d that can be applied to conventional railway vehicles without changing the railway vehicle or the snow plow itself.

次に、本発明を更に具体的に説明するために、実施例及び比較例を挙げて、本実施形態に係る補助排障器について騒音低減効果を確認する実験を実施した。当該実験は、鉄道車両先頭部の１／６．３縮尺模型を用いた風洞試験機において、風速を２００ｋｍ／ｈで生じる空力音の音圧レベルを測定したものである。 Next, in order to explain the present invention more specifically, an experiment was conducted to confirm the noise reduction effect of the auxiliary restraint system according to the present embodiment by giving examples and comparative examples. In the experiment, the sound pressure level of aerodynamic noise generated at a wind speed of 200 km/h was measured in a wind tunnel tester using a 1/6.3 scale model of the head of a railway vehicle.

実施例１は、第１の実施形態に係る補助排障器１０、実施例２は、第２の実施形態に係る補助排障器１０ａ、実施例３は、第３の実施形態に係る補助排障器１０ｃ、実施例４は、第４の実施形態に係る補助排障器１０ｄ並びに比較例は、従来の補助排障器を風洞試験用模型に取り付けてそれぞれの音圧レベルを測定した。 Example 1 is the auxiliary evacuation device 10 according to the first embodiment, Example 2 is the auxiliary evacuation device 10a according to the second embodiment, and Example 3 is the auxiliary evacuation device according to the third embodiment. The sound pressure levels of the barrier 10c, Example 4, the auxiliary barrier 10d according to the fourth embodiment, and the conventional auxiliary barrier 10d of the comparative example were attached to the wind tunnel test model, and the respective sound pressure levels were measured.

図８に示すように、実施例１及び２では、比較例と比べて５０Ｈｚから５００Ｈｚ帯における空力音を２から７．５ｄＢ低減することが確認できた。また、実施例１及び２は、オーバーオール値でも２ｄＢ以上の空力音の低減効果が認められた。 As shown in FIG. 8, in Examples 1 and 2, it was confirmed that the aerodynamic noise in the 50 Hz to 500 Hz band was reduced by 2 to 7.5 dB compared to the comparative example. Further, in Examples 1 and 2, an effect of reducing aerodynamic noise of 2 dB or more was recognized even at the overall value.

また、図９に示すように、実施例３及び４についても実施例１及び２のように排障部１２の背面を大きく肉厚部を形成しなくとも、１００Ｈｚから６３０Ｈｚ帯で空力音が低減することが確認できた。 In addition, as shown in FIG. 9, in Examples 3 and 4, the aerodynamic noise is reduced in the band from 100 Hz to 630 Hz without forming a large thick portion on the rear surface of the obstacle guarding portion 12 as in Examples 1 and 2. It was confirmed that

なお、図８及び図９に示すように、実施例１から４は、形状に応じて音圧レベルが低減する周波数帯が異なっているため、低減したい周波数帯に応じて適宜実施例１から４を採用することで、より効果的な空力音の低減を図ることが可能となる。 As shown in FIGS. 8 and 9, in Examples 1 to 4, the frequency band in which the sound pressure level is reduced differs depending on the shape. By adopting, it is possible to reduce aerodynamic noise more effectively.

また、上述した本実施形態に係る補助排障器１０，１０ａ，１０ｃ，１０ｄは、排障部１２の背面に種々の形状で厚肉部を形成した場合について説明を行ったが、その形状は、各実施形態に係る補助排障器の形状に限らず、種々の形状に変更しても構わない。その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれうることが、特許請求の範囲の記載から明らかである。 Further, in the above-described auxiliary obstacle-relief devices 10, 10a, 10c, and 10d according to the present embodiment, cases where thick-walled portions of various shapes are formed on the rear surface of the obstacle-relief portion 12 have been described. , the shape of the auxiliary obstacle scavenger according to each embodiment is not limited, and may be changed to various shapes. It is clear from the description of the scope of claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

１鉄道車両，２スノープラウ，３レール，１０，１０ａ，１０ｃ，１０ｄ補助排障器，１１取付部，１２排障部，１３，１３ａ，１３ｃ，１３ｄ厚肉部，１４取付孔，２１側面，２２斜面，２３，２４先端側傾斜面，２５底面側傾斜面。 1 railcar 2 snow plow 3 rail 10, 10a, 10c, 10d auxiliary obstacle guard 11 mounting part 12 obstacle removing part 13, 13a, 13c, 13d thick part 14 mounting hole 21 side, 22 inclined surface, 23, 24 tip side inclined surface, 25 bottom side inclined surface.

Claims

鉄道車両先端の下部又は、鉄道車両の先端面の下部に配設されるスノープラウに取り付けられる補助排障器であって、
当該補助排障器は、前記鉄道車両の下部又は前記スノープラウに取り付けられる取付部と、前記取付部から下方に延びる排障部とを有し、
前記排障部は、前記スノープラウ又は前記鉄道車両の底面に沿って延設される厚肉部を有し、
前記厚肉部は、前記排障部の延設方向と略直交する方向に延設されると共に、前記排障部の延設方向の両端から延びる側面を有することを特徴とする補助排障器。 An auxiliary scaffolding device attached to a snow plow disposed at the bottom of the front end of a railway vehicle or at the bottom of the front end surface of the railway vehicle,
The auxiliary obstacle guard has a mounting portion attached to the lower portion of the railroad vehicle or the snow plow, and an obstacle guard portion extending downward from the mounting portion,
The obstacle evacuation part has a thick part extending along the bottom surface of the snow plow or the railway vehicle,
The thick-walled portion extends in a direction substantially orthogonal to the extending direction of the obstruction-relief portion, and has side surfaces extending from both ends of the obstruction-relief portion in the extending direction. vessel.

請求項１に記載の補助排障器において、
前記厚肉部は、前記側面同士が漸次近接するように連続する斜面を有することを特徴とする補助排障器。 In the auxiliary restraint device according to claim 1,
The auxiliary obstacle scavenger , wherein the thick portion has a continuous slope so that the side surfaces gradually approach each other.

請求項１又は２に記載の補助排障器において、
前記排障部及び前記厚肉部は、前記鉄道車両の先端側に傾斜する先端側傾斜面を有することを特徴とする補助排障器。 In the auxiliary restraint device according to claim 1 or 2,
The auxiliary obstacle scavenger, wherein the obstacle-relief part and the thick-walled part have a tip-side inclined surface that is inclined toward the tip side of the railway vehicle.

請求項１に記載の補助排障器において、
前記厚肉部は、前記底面に対して傾斜する底面側傾斜面を有することを特徴とする補助排障器。 In the auxiliary restraint device according to claim 1 ,
The auxiliary restrainer, wherein the thick portion has a bottom-side inclined surface that is inclined with respect to the bottom surface.

請求項４に記載の補助排障器において
前記底面側傾斜面は、前記排障部の下端から延設されることを特徴とする補助排障器。 5. The auxiliary obstacle-relief device according to claim 4, wherein the bottom-side inclined surface extends from the lower end of the obstacle-relief portion.