JP4794039B2

JP4794039B2 - Line crossing cable protection device and line crossing cable protection method

Info

Publication number: JP4794039B2
Application number: JP2000378739A
Authority: JP
Inventors: 義人奥芝; 武二福田; 啓介切敷
Original assignee: Hokkaido Railway Co
Current assignee: Hokkaido Railway Co
Priority date: 2000-12-13
Filing date: 2000-12-13
Publication date: 2011-10-12
Anticipated expiration: 2020-12-13
Also published as: JP2002180401A

Description

【０００１】
【発明の属する技術分野】
本発明は、鉄道のレールの下方を横断して延設される線路下横断ケーブルをまくらぎに取り付けて防護する線路下横断ケーブル防護装置、及び線路下横断ケーブルの防護方法に関するものである。
【０００２】
【従来の技術】
鉄道においては、軌道回路の両端部に設けられるインピーダンスボンドの配線を行うため、鉄道のレールの下方を線路方向に対してほぼ直角方向に横断してケーブル（以下、「線路下横断ケーブル」という。）を配設する必要がある。インピーダンスボンドの他、踏切に設けられる踏切制御機器の配線を行う場合にも、線路下横断ケーブルを配置する必要がある。
【０００３】
このような場合には、従来は、図２０に示すように、「ケーブル防護用ＰＣまくらぎ」と呼ばれる特殊なまくらぎ６０を使用していた。このケーブル防護用ＰＣまくらぎ６０は、まくらぎの肩部が凹部（以下、「ケーブル収容凹部」という。）６０ａ、６０ｂとなっており、このケーブル収容凹部６０ａ、６０ｂにケーブルＣを入れることができるようになっている。
【０００４】
また、ケーブル防護用ＰＣまくらぎ６０には、数カ所にボルト用埋込栓６０ｃがまくらぎ製造時に埋設されている。これにより、鋼板等で略「コ」字断面形状となるように形成されボルト挿通孔（図示せず）が開設されたケーブル防護用カバー６２、６３、６４を用い、カバー取付用ボルト６５、６６、６７等をケーブル防護用カバー６２〜６４等のボルト挿通孔を通してボルト用埋込栓６０ｃにねじ込むことにより、ケーブル防護用カバー６２〜６４等をケーブル防護用ＰＣまくらぎ６０に取り付けることができる。
【０００５】
ケーブル防護用カバー６２〜６４等は、マルチプルタイタンパー等の軌道保守機械で頻繁に作業を行う箇所の付近に取り付けられ、これらの作業時に機械等によってケーブルＣが損傷、切断等されないように配慮されている。
【０００６】
しかし、上記のようなケーブル防護用ＰＣまくらぎ６０は、特殊な構成を有しているため、材料コストが高い、という問題があった。さらに、まくらぎを交換する場合、他の標準まくらぎとは異なる特殊なものであるため、標準まくらぎとは別の作業となり、保守作業費用も割高である、という問題があった。
【０００７】
この問題を解決するため、出願人らは、硬質材料からなる第２管状部材の中にケーブルを入れ、この第２管状部材を、ＦＲＰ等の可撓性材料からなる第１管状部材の中に収容し、第１管状部材をまくらぎ端部に支持された部材の係合凹部に嵌合させて支持させる線路下横断ケーブル取付構造を開発し提案した（特願平１０−２７３０１７号参照）。
【０００８】
【発明が解決しようとする課題】
しかしながら、上記した線路下横断ケーブル取付構造は、マルチプルタイタンパーのタンピングツールにより誤って打撃を受けることがかあり、それにより破損する可能性があった。また、上記した線路下横断ケーブル取付構造を、既設の線路下横断ケーブルに適用する場合には、すでに接続されている線路下横断ケーブルの接続箇所の少なくとも１箇所を、一旦取り外し、上記の第２管状部材や第１管状部材の中を挿通させ、再度接続しなおす必要があった。このため、その改良が望まれていた。
【０００９】
本発明は上記の問題を解決するためになされたものであり、本発明の解決しようとする課題は、ケーブル破損に対する強度が高く、施工の容易な線路下横断ケーブル防護装置、及び線路下横断ケーブルの防護方法を提供することにある。
【００１０】
【課題を解決するための手段】
上記課題を解決するため、本発明に係る線路下横断ケーブル防護装置は、
鉄道のレールを支持するまくらぎにおいてレール長手方向に垂直なまくらぎ長手方向の端部となる２つのまくらぎ端部にそれぞれ支持されるとともに円形開口部を有する２つのまくらぎ端支持部材と、
鋼からなり内部にケーブルが収容可能な管状の部材で、前記まくらぎ長手方向に延在するように配設され、前記管の両端付近が前記各まくらぎ端支持部材の各円形開口部に挿通されそれぞれ防護管固定手段により前記各まくらぎ端支持部材に固定されて支持されるケーブル防護管と、
前記ケーブル防護管と前記まくらぎとの間を電気的に絶縁する第１電気絶縁手段を
備える線路下横断ケーブル防護装置であって、
前記ケーブル防護管には、その一部が管長手方向の全長にわたって線状に切り欠かれ前記ケーブルを挿入可能な線状切欠部が形成され、
前記円形開口部には、前記ケーブルを挿入可能な切欠箇所である第１ケーブル挿入用切欠部が形成され、
前記防護管固定手段には、前記ケーブルを挿入可能な切欠箇所である第２ケーブル挿入用切欠部が形成され、
前記第１電気絶縁手段には、前記ケーブルを挿入可能な切欠箇所である第３ケーブル挿入用切欠部が形成されること
を特徴とする。
【００１１】
上記した線路下横断ケーブル防護装置において、好ましくは、前記防護管固定手段は、前記ケーブル防護管の両端付近の外周面に形成された雄ねじ部と、前記雄ねじ部に螺合可能な雌ねじ部を有する固定用ナットを有する。
【００１２】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記第１電気絶縁手段は、高分子材料からなり内部に前記ケーブル防護管が挿通可能な筒状に形成された絶縁筒状部材であり、前記絶縁筒状部材は、前記各まくらぎ端支持部材の円形開口部と前記ケーブル防護管との間に介在するように設置される。
【００１３】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記各まくらぎ端支持部材の円形開口部は、電気的絶縁のための離隔距離が前記ケーブル防護管と前記レールとの間に確保される位置に設けられる。
【００１４】
また、上記した線路下横断ケーブル防護装置において、好ましくは、ゴム系材料からなり、前記線状切欠部内に嵌め込まれて前記ケーブル防護管に着脱可能とする嵌込部と、前記線状切欠部を閉塞することにより前記ケーブル防護管内部に収容された前記ケーブルが脱落することを防止する本体部を有する切欠閉塞部材を備える。
【００１５】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記切欠閉塞部材は、前記ケーブル防護管と前記まくらぎとの間を電気的に絶縁する第２電気絶縁手段を兼ねる。
【００１６】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記ケーブル防護管に取り付けられ、前記第１ケーブル挿入用切欠部と嵌合することにより、少なくとも前記ケーブル防護管の回転移動を防止する移動防止部材を備える。
【００１７】
また、上記した線路下横断ケーブル防護装置において、好ましくは、
前記まくらぎ端支持部材は、
前記まくらぎ端部付近の表面のうちの一面である第１被圧面を押圧可能な第１押圧部を有する第１支持部材と、
前記まくらぎ端部付近の表面のうちの他の面である第２被圧面を押圧可能な第２押圧部を有する第２支持部材と、
前記第１押圧部により前記第１被圧面に押圧させるとともに前記第２押圧面により前記第２被圧面を押圧させて前記第１支持部材及び前記第２支持部材を前記まくらぎ端部に固定する支持用ボルト及び支持用ナットを有する。
【００１８】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記第１押圧部により前記第１被圧面を押圧させるとともに前記第２押圧面により前記第２被圧部を押圧させるように付勢する付勢部材を有する。
【００１９】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記第１押圧部と前記第１被圧面との間に介設され前記第１押圧部による前記第１被圧面の押圧を補助する第１押圧補助部材と、前記第２押圧部と前記第２被圧面との間に介設され前記第２押圧部による前記第２被圧面の押圧を補助する第２押圧補助部材を有する。
【００２０】
また、上記した線路下横断ケーブル防護装置において、好ましくは、前記第１支持部材又は前記第２支持部材の下部に取り付けられるとともに前記まくらぎ端部の底面に下方から当接する第３支持部材を有する。
【００２１】
また、本発明に係る線路下横断ケーブルの防護方法は、円形開口部を有する２つのまくらぎ端支持部材を、鉄道のレールを支持するまくらぎにおいてレール長手方向に垂直なまくらぎ長手方向の端部となる２つのまくらぎ端部に取り付ける第１工程と、次いで、鋼からなり内部にケーブルが収容可能な管状に形成されるとともにその一部が管長手方向の全長にわたって線状に切り欠かれ前記ケーブルを挿入可能な線状切欠部が形成されたケーブル防護管を、前記まくらぎ長手方向に延在させるとともに、前記ケーブル防護管の両端付近を前記各まくらぎ端支持部材の各円形開口部に挿通する第２工程と、次いで、前記線状切欠部と、前記円形開口部に形成され前記ケーブルを挿入可能な切欠箇所である第１ケーブル挿入用切欠部と、前記各まくらぎ端支持部材に前記ケーブル防護管を固定する防護管固定手段に形成され前記ケーブルを挿入可能な切欠箇所である第２ケーブル挿入用切欠部と、前記ケーブル防護管と前記まくらぎとを電気的に絶縁する第１電気絶縁手段に形成され前記ケーブルを挿入可能な切欠箇所である第３ケーブル挿入用切欠部を通して、前記ケーブル防護管の内部にケーブルを収容させて線路下を横断させる第３工程と、前記ケーブル防護管の両端部を、それぞれ防護管固定手段により前記各まくらぎ端支持部材に固定させ、第１電気絶縁手段により前記ケーブル防護管と前記まくらぎとの間を電気的に絶縁する第４工程を有することを特徴とする。
【００２２】
【発明の実施の形態】
以下、本発明の実施形態について、図面を参照しながら説明する。
【００２３】
図１は、本発明の一実施形態である線路下横断ケーブル防護装置の構成を示す線路方向に見た正面図である。
【００２４】
図１に示すように、この線路下横断ケーブル防護装置１００は、まくらぎ端支持部材３と、ケーブル防護管１と、防護管固定絶縁構造２を備えて構成されている。
【００２５】
まくらぎ端支持部材３は、まくらぎ５０においてレール長手方向に垂直なまくらぎ長手方向の端部となるまくらぎ端部に、後述するボルト等により支持されている。また、ケーブル防護管１は、レール長手方向に垂直なまくらぎ長手方向に延在するように配設され、その両端が２個のまくらぎ端支持部材３、３によって支持され、その内部にケーブルＣを収容している。また、ケーブル防護管１は、防護管固定絶縁構造２により、各まくらぎ端支持部材３、３に固定されて支持されている。
【００２６】
次に、ケーブル防護管１の構成について、さらに詳細に説明する。図２は、図１に示す線路下横断ケーブル防護装置におけるケーブル防護管のさらに詳細な構成を示す図であり、図２（Ａ）はケーブル防護管の端部付近の管長手方向の縦断面図を、図２（Ｂ）は図２（Ａ）におけるＡ−Ａ横断面図を、図２（Ｃ）は図２（Ａ）におけるＢ−Ｂ横断面図を、それぞれ示している。
【００２７】
図２に示すように、ケーブル防護管１は、鋼からなる管状の部材であり、一般部１ａと、両端付近に形成された雄ねじ部１ｂを有している。雄ねじ部１ｂの外周面には、雄ねじが形成されている。また、ケーブル防護管１の内部には、ケーブルＣが収容可能な略円柱状のケーブル収容空間１ｅが設けられている。また、ケーブル防護管１には、その一部が管長手方向の全長にわたって線状に切り欠かれたスリット状の線状切欠部１ｃが形成されている。この線状切欠部１ｃの幅ｂ１は、ケーブルＣの外径よりも大きな値に設定されている。また、ケーブル防護管１の一般部１ａの両端付近（雄ねじ部１ｂとの境界付近）には、内壁に雌ねじが形成されたねじ孔１ｄが形成されている。
【００２８】
次に、まくらぎ端支持部材３の構成について、さらに詳細に説明する。図３は、図１に示す線路下横断ケーブル防護装置のさらに詳細な構成を示す図であり、図３（Ａ）は図１におけるまくらぎ端部の拡大上面図を、図３（Ｂ）は図１におけるまくらぎ端部の拡大側面図を、それぞれ示している。また、図４は、図１に示す線路下横断ケーブル防護装置の構成部品である第１支持部材の構成を示す図であり、図４（Ａ）は上面図を、図４（Ｂ）は側面図を、図４（Ｃ）は正面図を、それぞれ示している。また、図５は、図１に示す線路下横断ケーブル防護装置の構成部品である第２支持部材の構成を示す図であり、図５（Ａ）は上面図を、図５（Ｂ）は正面図を、図５（Ｃ）は側面図を、それぞれ示している。また、図６は、図１に示す線路下横断ケーブル防護装置の構成部品である第３支持部材の構成を示す図であり、図６（Ａ）は上面図を、図６（Ｂ）は側面図を、図６（Ｃ）は正面図を、それぞれ示している。また、図７は、図１に示す線路下横断ケーブル防護装置の構成部品である付勢用ばねと支持用ボルトの構成を示す図であり、図７（Ａ）は付勢用ばねの側面図を、図７（Ｂ）は支持用ボルトの側面図を、それぞれ示している。また、図８は、本発明の一実施形態である線路下横断ケーブル防護装置における第１押圧補助部材の拡大図である。
【００２９】
まくらぎ端支持部材３は、図３等に示すように、第１支持部材３１と、第２支持部材３２と、第３支持部材３３と、２本の支持用ボルト３５、３５と、２個の支持用ナット３６、３６と、付勢用ばね３４と、２本の第３支持部材取付用ボルト３７、３７と、２個の第３支持部材取付用ナット３８、３８と、４枚の平座金３９、３９、３９、３９と、第１押圧補助部材４１と、第２押圧補助部材４２を有している。なお、図３（Ａ）、図３（Ｂ）においては、複雑化を避けるため、防護管固定絶縁構造２の図示を省略している。
【００３０】
上記において、付勢用ばね３４は、特許請求の範囲における付勢部材に相当している。次に、上記したまくらぎ端支持部材３の各構成部品の構成について説明する。
【００３１】
第１支持部材３１は、図４（Ａ）、図４（Ｂ）、図４（Ｃ）に示すように、鋼材からなり、矩形板状の垂直部３１ａと第１押圧部３１ｂを有している。第１押圧部３１ｂは、一つの板部材に切込み等を入れて曲げ加工するか、あるいは２つの板部材を溶接すること等により、垂直部３１ａの上部から屈曲するように形成されている。また、第１押圧部３１ｂの板面は、垂直部３１ａの板面に対して垂直になるように形成されている。
【００３２】
また、垂直部３１ａの上部には、後述するケーブル防護管１を支持するための円形開口部３１ｃが形成されている。この円形開口部３１ｃは、ほぼ円形をなす切欠きとなっている。この円形開口部３１ｃの斜め上方には、ケーブルＣを挿入可能な切欠箇所である第１ケーブル挿入用切欠部３１ｈが形成されている。第１ケーブル挿入用切欠部３１ｈを挟む部分は、切欠周辺部３１ｉ、３１ｋとなっている。また、垂直部３１ａの下部には、後述する第３支持部材３３をボルトで取り付けるためのボルト用孔３１ｄが開設されている。
【００３３】
一方、第１押圧部３１ｂの中央付近には、後述する支持用ボルト３５を取り付けるためのボルト用孔３１ｅが開設されている。また、第１押圧部３１ｂの下部には、後述する第１押圧補助部材４１を取り付けるための取付用孔３１ｆ、３１ｇが開設されている。
【００３４】
第２支持部材３２は、図５（Ａ）、図５（Ｂ）、図５（Ｃ）に示すように、鋼材からなり、矩形板状態の垂直部３２ａと第２押圧部３２ｂを有している。第２押圧部３２ｂは、一つの板部材に切込み等を入れて曲げ加工するか、あるいは２つの板部材を溶接すること等により、垂直部３２ａの上部から屈曲するように形成されている。また、第２押圧部３２ｂの板面は、垂直部３２ａの板面に対して垂直になるように形成されている。
【００３５】
また、垂直部３２ａの上部には、後述するケーブル防護管１を支持するための円形開口部３２ｃが形成されている。この円形開口部３２ｃは、ほぼ円形をなす切欠きとなっている。この円形開口部３２ｃの斜め上方には、ケーブルＣを挿入可能な切欠箇所である第１ケーブル挿入用切欠部３２ｈが形成されている。第１ケーブル挿入用切欠部３２ｈを挟む部分は、切欠周辺部３２ｉ、３２ｋとなっている。また、垂直部３２ａの下部には、後述する第３支持部材３３をボルトで取り付けるためのボルト用孔３２ｄが開設されている。
【００３６】
一方、第２押圧部３２ｂの中央付近には、後述する支持用ボルト３５を取り付けるためのボルト用孔３２ｅが開設されている。また、第２押圧部３２ｂの下部には、後述する第２押圧補助部材４２を取り付けるための取付用孔３２ｆ、３２ｇが開設されている。
【００３７】
また、第１支持部材３１と第２支持部材３２は、互いに対称な形状となっており、垂直部３１ａが垂直部３２ａに対応し、第１押圧部３１ｂが第２押圧部３２ｂに対応している。また、円形開口部３１ｃが円形開口部３２ｃに対応している。また、ボルト用孔３１ｄ、３１ｅがボルト用孔３２ｄ、３２ｅにそれぞれ対応し、取付用孔３１ｆ、３１ｇが取付用孔３２ｆ、３２ｇにそれぞれ対応している。
【００３８】
第３支持部材３３は、図６（Ａ）、図６（Ｂ）、図６（Ｃ）に示すように、鋼材からなり、矩形板状態の垂直部３３ａと水平部３３ｂを有している。第３支持部材３３は、一つの板部材に曲げ加工するか、あるいは圧延加工等の一体形成を行うこと等によって形成されている。また、水平部３３ｂの板面は、垂直部３３ａの板面に対して垂直になるように形成されており、第３支持部材３３の断面形状は略「Ｌ」字状となっている。また、垂直部３３ａには、上記した第１支持部材３１及び第２支持部材３２にボルトで取り付けるためのボルト用の長円孔３３ｃ、３３ｄが開設されている。また、第３支持部材取付用ボルト３７は、鋼材からなるボルトである。また、第３支持部材取付用ナット３８は、鋼材からなり六角形状に形成されたナットである。また、平座金３９は、鋼材からなり円板状に形成されたナットである。
【００３９】
付勢用ばね３４は、図７（Ａ）に示すように、線状のばね鋼材からなり、コイル状（弦巻状）に形成されたばねである。
【００４０】
支持用ボルト３５は、図７（Ｂ）に示すように、鋼材からなり、円柱状の軸部３５ａと、ばね嵌合部３５ｂと、雄ねじ部３５ｃを有している。ばね嵌合部３５ｂは、らせん状の溝を有している。このため、ばね嵌合部３５ｂを付勢用ばね３４の端部３４ａ又は３４ｂの内部へねじ込むと、らせん状溝が付勢用ばね３４の端部３４ａ又は３４ｂの内側と嵌合する。支持用ナット３６は、鋼材からなり六角形状に形成されたナットである。
【００４１】
第１押圧補助部材４１は、図３（Ｂ）、図８に示すように、合成樹脂材料やゴム系材料からなり、三角柱状のクサビ部４１ａと、クサビ部４１ａの平面側に設けられた２つの突起状の嵌合部４１ｂ、４１ｂと、押え部４１ｃを有している。クサビ部４１ａの傾斜面の傾斜角度は、まくらぎ５０の前後側面（レール長手方向に対して前面又は後面となる側面）の傾斜角度と等しい値に設定されている。また、押え部４１ｃの底面形状は、まくらぎ５０の肩部の曲面と同様な曲面形状に形成されている。第２押圧補助部材４２は、図３（Ｂ）に示すように、合成樹脂材料やゴム系材料からなり、第１押圧補助部材４１と同様の構成を有している。
【００４２】
次に、上記したまくらぎ端支持部材３、３をまくらぎ５０の両方のまくらぎ端部に取り付け、ケーブル防護管１と第２管状部材２をまくらぎ端支持部材３、３に取り付ける方法について説明する。
【００４３】
まず、所定のまくらぎ５０のまくらぎ端部にまくらぎ端支持部材３を取り付ける。このため、取り付けを行うまくらぎ５０のまくらぎ端部の道床砕石（バラスト）を掻き出し、まくらぎ５０のまくらぎ端部の側方及び下部にまくらぎ端支持部材３を取り付けることができる空間を作る。
【００４４】
上記の作業と並行して、まくらぎ端支持部材３の一部をあらかじめ組み立てる。まず、第３支持部材３３のボルト用孔３３ｃを、第１支持部材３１のボルト用孔３１ｄと合致させ、同様にして第３支持部材３３のボルト用孔３３ｄを、第２支持部材３２のボルト用孔３２ｄと合致させた後、２組の第３支持部材取付用ボルト３７、第３支持部材取付用ナット３８、平座金３９を用いて、第３支持部材３３を第１支持部材３１及び第２支持部材３２に取り付ける。この際、第３支持部材３３のボルト用孔３３ｃ、３３ｄが長円孔となっているので、まくらぎ５０の断面寸法が異なる各種のものについて対応が可能となっている。
【００４５】
この場合、第１支持部材３１の垂直部３１ａの下端と、第３支持部材３３の垂直部３３ａの下端とが一致するように設定し、同様に、第２支持部材３２の垂直部３２ａの下端と、第３支持部材３３の垂直部３３ａの下端とが一致するように設定する。これにより、第１支持部材３１と第２支持部材３２と第３支持部材３３は、図３（Ｂ）に示すように、まくらぎ５０の側面側から見ると、略「Ｕ」字状の部材となり、図１に示すように、まくらぎ５０の正面側から見ると、略「Ｆ」字状の構造となる。
【００４６】
また、第１支持部材３１の第１押圧部３１ｂの取付用孔３１ｆ、３１ｇに第１押圧補助部材４１の嵌合部４１ｂ、４１ｂを押入して嵌合させ、第１支持部材３１の第１押圧部３１ｂの内側に、図３（Ｃ）に示すように第１押圧補助部材４１を取り付ける。同様にして、第２支持部材３２の第２押圧部３２ｂの内側に第２押圧補助部材４２を取り付ける。
【００４７】
次に、上記のような組立てによって形成されたまくらぎ端支持部材３の一部のうち、第３支持部材３３の水平部３３ｂの上面を、まくらぎ５０のまくらぎ端部の下面に、図１、図３（Ｂ）に示すようにして下方から当接させる。また、同時に、第１押圧補助部材４１のクサビ部４１ａの傾斜面を、図３（Ｂ）、図８に示すように、まくらぎ５０の前後側面の上方の肩部に相当する傾斜面Ｓ１（以下、「第１被圧面」という。）に当接させる。同様にして、第２押圧補助部材４２についても、クサビ部（図示せず）の傾斜面をまくらぎ５０の前後側面の上方の肩部に相当する傾斜面Ｓ２（以下、「第２被圧面」という。）に当接させる（図３（Ｂ）参照）。
【００４８】
また、上記作業と並行して、２本のうちの一方の支持用ボルト３５のばね嵌合部３５ｂを付勢用ばね３４の一方の端部３４ａの内部へねじ込み、ばね嵌合部３５ｂのらせん状溝を付勢用ばね３４の端部３４ａの内壁と嵌合させる。また、同様にして、２本のうちの他方の支持用ボルト３５のばね嵌合部３５ｂを付勢用ばね３４の他方の端部３４ｂの内部へねじ込み、ばね嵌合部３５ｂのらせん状溝を付勢用ばね３４の他方の端部３４ｂの内壁と嵌合させる。これにより、付勢用ばね３４の両端３４ａ、３４ｂに支持用ボルト３５、３５を取り付け、ばね付きボルトを形成する。
【００４９】
次に、図３（Ａ）、図３（Ｂ）に示すように、上記のようにして形成されたばね付きボルトの端部となる雄ねじ部３５ｃの一方を、まくらぎ５０に当接された状態の第１支持部材３１の第１押圧部３１ｂのボルト用孔３１ｅに挿通させるとともに、ばね付きボルトの端部となる雄ねじ部３５ｃの他方を、まくらぎ５０に当接された状態の第２支持部材３２の第２押圧部３２ｂのボルト用孔３２ｅに挿通させ、それぞれに平座金３９を挿通させた後、それぞれに支持用ナット３６をねじ込み締め付ける。
【００５０】
このボルト締付力は、第１支持部材３１の第１押圧部３１ｂから第１押圧補助部材４１を経てまくらぎ５０の前後側面の上方肩部の第１被圧面Ｓ１に作用し、第１被圧面Ｓ１が締め付けられる。一方、同様に、ボルト締付力は、第２支持部材３２の第２押圧部３２ｂから第２押圧補助部材４２を経てまくらぎ５０の前後側面の上方肩部の第２被圧面Ｓ２に作用し、第２被圧面Ｓ２が締め付けられる。この締付作用により、まくらぎ端支持部材３は、まくらぎ５０のまくらぎ端部に固定され支持される。このようにして、図１に示すように、まくらぎ５０の一方の端部、及びまくらぎ５０の他方の端部に、それぞれまくらぎ端支持部材３を取り付ける。
【００５１】
このようにしてまくらぎ端支持部材３、３がまくらぎ５０の各まくらぎ端部に取り付けられると、図１に示すように、第１支持部材３１の垂直部３１ａの下部と、第３支持部材３３の垂直部３３ａの下部は、第３支持部材取付用ボルト３７等により一体化され、バラスト砕石Ｂ内に挿入される。このため、この部分は、周囲のバラスト砕石Ｂからの圧力を受け、この圧力によりまくらぎ５０が水平方向にずれることが防止される。同様にして、第２支持部材３２の垂直部３２ａの下部と、第３支持部材３３の垂直部３３ａの下部は、第３支持部材取付用ボルト３７等により一体化され、バラスト砕石Ｂ内に挿入され、この部分が周囲のバラスト砕石Ｂから圧力を受けることによりまくらぎ５０が水平方向にずれることが防止される。ここに、一体化された第１支持部材３１の垂直部３１ａの下部と、第３支持部材３３の垂直部３３ａの下部は、根入部を構成している。同様に、一体化された第２支持部材３２の垂直部３２ａの下部と、第３支持部材３３の垂直部３３ａの下部は、根入部を構成している。
【００５２】
ここまでの工程は、特許請求の範囲における第１工程に相当している。
【００５３】
次に、ケーブル防護管１を、防護管固定絶縁構造２により、各まくらぎ端支持部材３、３に固定することになるが、この説明に先立ち、図１における防護管固定絶縁構造２の構成についてさらに詳細に説明を行う。
【００５４】
図９は、図１に示す線路下横断ケーブル防護装置における防護管固定絶縁構造のさらに詳細な構成を示す図である。図９に示すように、防護管固定絶縁構造２は、防護管１の両端に形成された雄ねじ部１ｂと、固定用ナット２１と、固定用座金２２と、絶縁筒状部材２３と、移動防止部材２４と、取付ねじ２５を有している。次に、上記した防護管固定絶縁構造２の各構成部品の構成について説明する。
【００５５】
図１０は、図１に示す線路下横断ケーブル防護装置の構成部品である固定用ナットの構成を示す図であり、図１０（Ａ）は正面図を、図１０（Ｂ）は側面図を、それぞれ示している。また、図１１は、図１に示す線路下横断ケーブル防護装置の構成部品である固定用座金の構成を示す図であり、図１１（Ａ）は正面図を、図１１（Ｂ）は側面図を、それぞれ示している。また、図１２は、図１に示す線路下横断ケーブル防護装置の構成部品である絶縁筒状部材の構成を示す図であり、図１２（Ａ）は正面図を、図１２（Ｂ）は側面図を、それぞれ示している。また、図１４は、図１に示す線路下横断ケーブル防護装置の構成部品である移動防止部材とその取付ねじの構成を示す図であり、図１４（Ａ）は移動防止部材の上面図を、図１４（Ｂ）は移動防止部材の正面図を、図１４（Ｃ）は取付ねじの側面図を、それぞれ示している。なお、図９〜図１４は、同一の縮尺で図示されており、各部品の相対的な寸法の関係は実際の場合と等しくなっている。
【００５６】
図１０に示すように、固定用ナット２１は、横断面が六角形状で、内壁面に雌ねじ部２１ａが形成されている。この雌ねじ部２１ｂは、ケーブル防護管１の両端付近の外周面に形成された雄ねじ部１ｂに螺合可能となっている。また、固定用ナット２１の側部には、ナット切欠部２１ｂが形成されている。ナット切欠部２１ｂの切欠の幅ｂ２は、ケーブル防護管１の線状切欠部１ｃの幅と等しいか、それより大きな値となっている。
【００５７】
また、図１１に示すように、固定用座金２２は、横断面が略円形状の平座金であり、固定用座金２２の側部には、座金切欠部２２ａが形成されている。座金切欠部２２ａの切欠の幅ｂ３は、ケーブル防護管１の線状切欠部１ｃの幅と等しいか、それより大きな値となっている。また、固定用座金２２は、その内部に、ケーブル防護管１が挿通可能な略円盤状の防護管収容空間２２ｂが形成されている。
【００５８】
ナット切欠部２１ｂと座金切欠部２２ａは、後述するように、特許請求の範囲における第２ケーブル挿入用切欠部を構成する。
【００５９】
また、図１２に示すように、絶縁筒状部材２３は、プラスチック材料、繊維教化プラスチック材料（ＦＲＰ）等の電気的絶縁性を有する高分子材料、例えばＡＢＳ樹脂からなり、全体が略筒状に形成された部材である。絶縁筒状部材２３は、外部に突出した鍔状部２３ａと、筒状部２３ｂを有している。また、絶縁筒状部材２３は、その内部に、ケーブル防護管１が挿通可能な略円柱状の防護管収容空間２３ｄが形成されている。また、絶縁筒状部材２３の側部には、切欠箇所である第３ケーブル挿入用切欠部２３ｃが形成されている。第３ケーブル挿入用切欠部２３ｃの切欠の幅ｂ４は、ケーブル防護管１の線状切欠部１ｃの幅と等しいか、それより大きな値となっている。
【００６０】
図９に示すように、絶縁筒状部材２３は、各まくらぎ端支持部材３の円形開口部３２ｃとケーブル防護管１との間に介在するように設置され、ケーブル防護管１とまくらぎ５０との間を電気的に絶縁する。絶縁筒状部材２３は、特許請求の範囲における第１電気絶縁手段に相当している。
【００６１】
また、図１４に示すように、移動防止部材２４は、プラスチック材料、繊維教化プラスチック材料（ＦＲＰ）等の電気的絶縁性を有する高分子材料、例えばＡＢＳ樹脂からなり、全体が略直方体状に形成された部材である。移動防止部材２４は、略円柱状のねじ挿通孔２４ａと、円筒面の一部をなす凹面である底面２３ｂを有している。また、移動防止部材２４の短辺の幅ｂ６は、ケーブル防護管１の線状切欠部１ｃの幅より小さな値となっている。
【００６２】
また、取付ねじ２５は、略皿状の頭部２５ａと、外周面に雄ねじが形成された雄ねじ部２５ｂを有している。頭部２５ａの上面には、十字状の凹部２５ｃが形成されている。雄ねじ部２５ｂの雄ねじは、移動防止部材２４のねじ挿通孔２４ａに挿通可能で、ケーブル防護管１のねじ孔１ｄの内壁の雌ねじと螺合可能となっている。
【００６３】
図９に示すように、移動防止部材２４は、取付ねじ２５と、ケーブル防護管１のねじ孔１ｄとの螺合により、移動防止部材２４の短辺（幅ｂ６の部分）がケーブル防護管１の長手方向に向かって前縁及び後縁となるように、ケーブル防護管１の外側に取り付けられ、第１ケーブル挿入用切欠部３２ｈと嵌合することにより、ケーブル防護管１が管の中心軸のまわりに回転移動することを防止する。
【００６４】
図９に示すように、ケーブル防護管１の雄ねじ部１ｂと固定用ナット２１は互いに螺合し、固定用座金２２と絶縁筒状部材２３を、第２支持部材の切欠周辺部３２ｉ及び３２ｋに押し付け、まくらぎ端支持部材３に固定している。したがって、これらは、特許請求の範囲における防護管固定手段を構成している。
【００６５】
次に、防護管固定絶縁構造２により、ケーブル防護管１を、各まくらぎ端支持部材３、３に固定する方法について、図３、図９、及び図１５ないし図１８を参照しつつ詳細に説明を行う。図１５ないし図１８は、線路下横断ケーブル防護装置１００の固定方法、及び線路下横断ケーブル防護装置１００による線路下横断ケーブルの防護方法を説明する図である。
【００６６】
まず、上記のケーブル防護管１に、移動防止部材２４を取付ねじ２５、２５によって取り付ける。次に、図１５（Ａ）に示すように、移動防止部材２４を取り付けたケーブル防護管１を、まくらぎ端支持部材３の円形開口部３２ｃに挿入する。図１５（Ａ）において、３２ｉ、３２ｋは、垂直板３２ａのうち、第１ケーブル挿入用切欠部３２ｈを挟む切欠周辺部を示している。そして、さらに方向Ｄ１へ挿通を行い、移動防止部材２４が、円形開口部３２ｃの斜め上方の切欠箇所である第１ケーブル挿入用切欠部３２ｈを通過するようにする。この工程は、特許請求の範囲における第２工程に相当している。
【００６７】
次に、図１５（Ａ）、図１５（Ｂ）に示す方向Ｄ２へ、ケーブル防護管１を軸回り回転させる。これにより、図１５（Ｂ）に示すように、ケーブル防護管１の線状切欠部１ｃと、まくらぎ端支持部材３の第１ケーブル挿入用切欠部３２ｈが重なり合う状態となる。
【００６８】
次に、図１６（Ａ）に示すように、ケーブル防護管１の両端から、絶縁筒状部材２３を筒状部２３ｂを先頭にして挿通し、次いで、固定用座金２２を挿通し、最後に固定用ナット２１を螺合させる。そして、絶縁筒状部材２３、固定用座金２２、固定用ナット２１を適宜回転させて、これらの切欠部である第３ケーブル挿入用切欠部２３ｃと、座金切欠部２２ａと、ナット切欠部２１ｂが、ケーブル防護管１の線状切欠部１ｃと重なり合う状態となるようにする。この場合、座金切欠部２２ａと、ナット切欠部２１ｂは、特許請求の範囲における第２ケーブル挿入用切欠部を構成している。
【００６９】
次に、図１６（Ｂ）に示すように、第３ケーブル挿入用切欠部２３ｃと、座金切欠部２２ａと、ナット切欠部２１ｂと、線状切欠部１ｃを通して、ケーブルＣをケーブル防護管１の内部（ケーブル収容空間１ｅ）に収容させる。これにより、ケーブルＣは、線路下を横断して配置されることになる。また、既設の線路下横断ケーブルの場合であっても、上記の各切欠部２３ｃ、２２ａ、２１ｂ、１ｃを通せばよいため、すでに接続されている線路下横断ケーブルの接続箇所を取り外す必要はなく、施工は極めて容易である。ここまでの工程は、特許請求の範囲における第３工程に相当している。
【００７０】
しかし、この状態のままでは、ケーブルＣがケーブル防護管１内から外部へ再び脱落する可能性もある。このため、本実施形態の線路下横断ケーブル防護装置１００では、図１３に示すような切欠閉塞部材１１を備えている。この切欠閉塞部材１１は、合成ゴム等のゴム系材料からなり、本体部１１ａと、嵌合凹部１１ｂと、底部１１ｃを有している。嵌合凹部１１ｂは、両方の側部に設けられた凹部であり、凹部の内壁の間の距離（幅）ｂ５は、ケーブル防護管１の線状切欠部１ｃの幅より若干大きな値となっている。また、底部１１ｃの幅は、線状切欠部１ｃの幅よりかなり大きな値となっている。このような構成により、嵌合凹部１１ｂと底部１１ｃは、ゴム系材料の弾性により、線状切欠部１ｃに嵌め込まれる。また、本体部１１ａの幅は、線状切欠部１ｃの幅よりかなり大きな値となっており、線状切欠部１ｃを閉塞することができる。したがって、この切欠閉塞部材１１を、図１３に示すようにケーブル防護管１に取り付ければ、ケーブル防護管１内部に収容されたケーブルＣが脱落することを防止することができる。この場合、嵌合凹部１１ｂと底部１１ｃは、特許請求の範囲における嵌込部を構成している。
【００７１】
図１７は、切欠閉塞部材１１を、ケーブル防護管１に取り付ける方法を説明したものである。図１７に示すように、切欠閉塞部材１１をたわめながら、図の矢印部分を押圧すると、ゴム系材料の弾性により、底部１１ｃが押し縮められ、ケーブル防護管１の線状切欠部１ｃを経てケーブル収容空間１ｅ内に挿入され、嵌合凹部１１ｂが線状切欠部１ｃを構成する両側の突出端と嵌合する。これにより、図１３の横断面図の状態となる。
【００７２】
図１８（Ａ）は、図１６（Ｂ）の状態の後、ケーブル防護管１の線状切欠部１ｃに上記の切欠閉塞部材１１を装着した状態を示したものである。図１８（Ａ）に示すように、切欠閉塞部材１１は、移動防止部材２４の近傍程度までの長さとなっている。これは、図９に示すように、移動防止部材２４は、最終的には、第１ケーブル挿入用切欠部３２ｈと嵌合する状態となるので、切欠閉塞部材１１の端部が絶縁筒状部材２３の端部と干渉しないようにするためである。
【００７３】
次に、図１８（Ａ）、図１８（Ｂ）に示す方向Ｄ３へ、ケーブル防護管１を軸回り回転させる。これにより、図１８（Ｂ）に示すように、ケーブル防護管１に取り付けられた移動防止部材２４と、まくらぎ端支持部材３の第１ケーブル挿入用切欠部３２ｈが対向する状態となる。
【００７４】
次に、図１８（Ｂ）に示すように、移動防止部材２４を取り付けたケーブル防護管１を、方向Ｄ４に移動させ、移動防止部材２４を、まくらぎ端支持部材３の第１ケーブル挿入用切欠部３２ｈに挿入する。次に、固定用ナット２１を、いずれかの方向に回転させて、締め付ける。これにより、固定用ナット２１と、固定用座金２２と、絶縁筒状部材２３は、図１８（Ｂ）の右方へ向かって移動する。この際、絶縁筒状部材２３の第３ケーブル挿入用切欠部２３ｃは、移動防止部材２４に対向させた状態のままとする。これにより、絶縁筒状部材２３の筒状部２３ｂは、円形開口部３２ｃとケーブル防護管１の間の隙間に挿入され、一方、移動防止部材２４は、絶縁筒状部材２３の第３ケーブル挿入用切欠部２３ｃの中にも入り込む。この状態で、固定用ナット２１をさらに締め付けると、図９に示す状態となり、ケーブル防護管１は、まくらぎ端支持部材３に固定される。また、同時に、ケーブル防護管１とまくらぎ端支持部材３との間は、介在する絶縁筒状部材２３により電気的に絶縁される。したがって、ケーブル防護管１とまくらぎ５０との間は、電気的に絶縁される。ここまでの工程は、特許請求の範囲における第４工程に相当している。
【００７５】
この状態では、図３（Ｂ）に示すように、各まくらぎ端支持部材３の円形開口部３１ｃ、３２ｃは、まくらぎ５０の高さの中央部付近まで下げられて配置されており、ケーブル防護管１とレールＲ（図１参照）との間に、電気的絶縁のために必要な所要の離隔距離が確保されている。
【００７６】
また、この状態を横断面図で見ると、図１９に示すようになっている。すなわち、まくらぎ５０とケーブル防護管１の間には、ゴム系材料からなる切欠閉塞部材１１が挟まれており、切欠閉塞部材１１の本体部１１ａがまくらぎ５０の側面と接触するようになっている。このため、この切欠閉塞部材１１によっても、ケーブル防護管１とまくらぎ５０との間は電気的に絶縁されている。この場合、切欠閉塞部材１１は、特許請求の範囲における第２電気絶縁手段に相当している。
【００７７】
なお、上記の図１５ないし図１８による説明は、ケーブル防護管１の一方の端部における取り付けや固定について行ったが、ケーブル防護管１の他方の端部における取り付けや固定についても上記とまったく同様である。具体的には、上記の説明における円形開口部３２ｃを３１ｃに、第１ケーブル挿入用切欠部３２ｈを３１ｈに、切欠周辺部３２ｉ及び３２ｋを３１ｉ及び３１ｋに、それぞれ読み替えればよい。
【００７８】
上記のようにして構成された本実施形態の線路下横断ケーブル防護装置１００は、以下のような利点を有している。
【００７９】
（１）ケーブル防護管１は鋼管であるため、強度が高く、線路保守機械のタンピングツール等の打撃によっても破損することはなく、内部に収容されたケーブルの安全性が高い。
【００８０】
（２）また、各切欠部１ｃ等が設けられているため、既設のケーブルも、接続を取り外す必要がなく、そのままケーブル防護管１内に収容できるため、施工が容易で、間合いが短い場合でも施工が可能である。
【００８１】
（３）ケーブルＣを取り付けるまくらぎ５０は、標準のまくらぎでよいため、材料（製品）コストは、従来のケーブル防護用ＰＣまくらぎに比べて大幅に低減することができる。
【００８２】
（４）また、ケーブルＣを取り付けるまくらぎ５０が標準のものでよいことから、まくらぎの交換作業も一律に行うことができ、保守作業コストも、削減可能である。
【００８３】
（５）まくらぎ端支持部材３は、まくらぎ端部に容易に着脱できる構造となっているため、保守作業の能率が向上する。
【００８４】
（６）円形開口部３１ｈ、３２の配置位置、絶縁筒状部材２３、切欠閉塞部材１１により、レールやまくらぎとの間の短絡を防止することができ、信号故障等が確実に防止できる。
【００８５】
（７）まくらぎ端支持部材３は、支持用ボルト３５の締付力によりまくらぎ５０を締め付けることによりまくらぎ５０に取り付けることができるため、まくらぎ５０に取付用の孔を穿孔するなどの加工が不要であり、取付作業が容易であるうえ、取り付けるまくらぎ５０の強度を低下させることもない。
【００８６】
（８）支持用ボルト３５、３５には付勢用ばね３４が取り付けられており、各支持用ボルト３５、３５には付勢用ばね３４の弾性作用により引張力が加えられている。これにより、第１支持部材３１の第１押圧部３１ｂから第１押圧補助部材４１を経てまくらぎ５０の第１被圧面Ｓ１を押圧させるとともに、第２支持部材３２の第２押圧部３２ｂから第２押圧補助部材４２を経てまくらぎ５０の第２被圧面Ｓ２を押圧させるように付勢がなされ、かつ支持用ナット３６の内側の面が第１支持部材３１の第１押圧部３１ｂの外面及び第２支持部材３２の第２押圧部３２ｂの外面につねに押圧されている。このため、列車振動等により支持用ナット３６が緩むことが防止されている。
【００８７】
（９）この線路下横断ケーブル防護装置１００の各部材は、土木・建築用資材として広く使用されている鋼材、鋼板、コイルばね、ボルト、ナット、鋼管、プラスチック管等を使用することができるため、非常に便宜である。また、各部材に対する加工についても、特殊な加工を必要としないため、製造コストが低廉である。
【００８８】
（１０）この線路下横断ケーブル防護装置１００においては、まくらぎ５０とまくらぎ５０の中間の道床砕石の部分に突出する部分は、支持用ナット３６程度であるため、線路保守機械の作業のじゃまになることがない。
【００８９】
なお、本発明は、上記実施形態に限定されるものではない。上記実施形態は、例示であり、本発明の特許請求の範囲に記載された技術的思想と実質的に同一な構成を有し、同様な作用効果を奏するものは、いかなるものであっても本発明の技術的範囲に包含される。
【００９０】
例えば、上記実施形態においては、移動防止部材２４をあらかじめケーブル防護管１に取り付けてから、まくらぎ端支持部材３に固定する方法を例に挙げて説明したが、本発明はこれには限定されず、他の方法、例えば、移動防止部材２４は、図９に示すような位置関係とした後に、取付ねじ２５により後から取り付けるようにしてもよい。
【００９１】
また、上記実施形態においては、付勢部材としてコイル状のばねを用いる構成を例に挙げて説明したが、本発明はこれには限定されず、付勢部材を用いない構成であってもよい。
【００９２】
また、付勢部材を用いる場合には、コイル状のばねのみに限定されず、板ばね、竹の子状のばね等であってもよい。また、引張ばねのみに限定されず、圧縮ばねであってもよい。圧縮ばねを付勢部材として用いる場合には、例えば、第１押圧部３１ｂと第２押圧部３２ｂの内側に配置し、第１押圧部３１ｂと第２押圧部３２ｂに圧縮力を付与するように構成すればよい。
【００９３】
また、上記実施形態においては、第１被圧面、第２被圧面として、まくらぎ端部の前後側面の上方肩部の傾斜面を例に挙げて説明したが、本発明はこれには限定されず、まくらぎの他の面を第１被圧面及び第２被圧面として押圧し締め付けてもよい。例えば、まくらぎ端部の上面と下面を第１被圧面又は第２被圧面として押圧して締め付けてもよい。この場合には、第１押圧部又は第２押圧部は、まくらぎ端部の上面又は下面に対向する位置に配置され、付勢部材は鉛直方向に配置される。
【００９４】
また、他の形態として、まくらぎ端部の前後側面の斜面の中央部付近を第１被圧面及び第２被圧面として押圧し締め付けたり、まくらぎ端部の前後側面の斜面の下部付近を第１被圧面及び第２被圧面として押圧し締め付けるようにしてもよい。この場合には、第１押圧部又は第２押圧部は、まくらぎ端部の端面の外側の中央部付近、又はまくらぎ端部の端面側の下部付近に配置され、付勢部材はまくらぎ端部の端面の外側で水平方向に配置される。
【００９５】
また、上記実施形態においては、第１押圧補助部材、第２押圧補助部材として、三角形断面の部分を有する部材を例に挙げて説明したが、本発明はこれには限定されず、他の構成の部材、例えば、台形断面の部分を有する部材等であってもよい。
【００９６】
【発明の効果】
以上説明したように、本発明によれば、鋼製のケーブル防護管を用いたため、ケーブル破損に対する強度が高く、ケーブル防護管に線状切欠部を設けるとともに、まくらぎ端支持部材に第１ケーブル挿入用切欠部を、防護管固定手段に第２ケーブル挿入用切欠部を、第１電気絶縁手段に第３ケーブル挿入用切欠部を設けたので、既設の線路下横断ケーブルでも既設接続を外すことなく収容施工が容易に行える、等の利点を有している。
【図面の簡単な説明】
【図１】本発明の一実施形態である線路下横断ケーブル防護装置の構成を示す線路方向に見た正面図である。
【図２】図１に示す線路下横断ケーブル防護装置におけるケーブル防護管のさらに詳細な構成を示す図であり、図２（Ａ）はケーブル防護管の端部付近の管長手方向の縦断面図を、図２（Ｂ）は図２（Ａ）におけるＡ−Ａ横断面図を、図２（Ｃ）は図２（Ａ）におけるＢ−Ｂ横断面図を、それぞれ示している。
【図３】図１に示す線路下横断ケーブル防護装置のさらに詳細な構成を示す図であり、図３（Ａ）は図１におけるまくらぎ端部の拡大上面図を、図３（Ｂ）は図１におけるまくらぎ端部の拡大側面図を、それぞれ示している。
【図４】図１に示す線路下横断ケーブル防護装置の構成部品である第１支持部材の構成を示す図であり、図４（Ａ）は上面図を、図４（Ｂ）は側面図を、図４（Ｃ）は正面図を、それぞれ示している。
【図５】図１に示す線路下横断ケーブル防護装置の構成部品である第２支持部材の構成を示す図であり、図５（Ａ）は上面図を、図５（Ｂ）は正面図を、図５（Ｃ）は側面図を、それぞれ示している。
【図６】図１に示す線路下横断ケーブル防護装置の構成部品である第３支持部材の構成を示す図であり、図６（Ａ）は上面図を、図６（Ｂ）は側面図を、図６（Ｃ）は正面図を、それぞれ示している。
【図７】図１に示す線路下横断ケーブル防護装置の構成部品である付勢用ばねと支持用ボルトの構成を示す図であり、図７（Ａ）は付勢用ばねの側面図を、図７（Ｂ）は支持用ボルトの側面図を、それぞれ示している。
【図８】本発明の一実施形態である線路下横断ケーブル防護装置における第１押圧補助部材の拡大図である。
【図９】図１に示す線路下横断ケーブル防護装置における防護管固定絶縁構造のさらに詳細な構成を示す図である。
【図１０】図１に示す線路下横断ケーブル防護装置の構成部品である固定用ナットの構成を示す図であり、図１０（Ａ）は正面図を、図１０（Ｂ）は側面図を、それぞれ示している。
【図１１】図１に示す線路下横断ケーブル防護装置の構成部品である固定用座金の構成を示す図であり、図１１（Ａ）は正面図を、図１１（Ｂ）は側面図を、それぞれ示している。
【図１２】図１に示す線路下横断ケーブル防護装置の構成部品である絶縁筒状部材の構成を示す図であり、図１２（Ａ）は正面図を、図１２（Ｂ）は側面図を、それぞれ示している。
【図１３】図１に示す線路下横断ケーブル防護装置の構成部品である切欠閉塞部材の構成を示す横断面図である。
【図１４】図１に示す線路下横断ケーブル防護装置の構成部品である移動防止部材とその取付ねじの構成を示す図であり、図１４（Ａ）は移動防止部材の上面図を、図１４（Ｂ）は移動防止部材の正面図を、図１４（Ｃ）は取付ねじの側面図を、それぞれ示している。
【図１５】本発明の一実施形態である線路下横断ケーブル防護装置の固定方法、及びこの線路下横断ケーブル防護装置による線路下横断ケーブルの防護方法を説明する第１の図である。
【図１６】本発明の一実施形態である線路下横断ケーブル防護装置の固定方法、及びこの線路下横断ケーブル防護装置による線路下横断ケーブルの防護方法を説明する第２の図である。
【図１７】本発明の一実施形態である線路下横断ケーブル防護装置の固定方法、及びこの線路下横断ケーブル防護装置による線路下横断ケーブルの防護方法を説明する第３の図である。
【図１８】本発明の一実施形態である線路下横断ケーブル防護装置の固定方法、及びこの線路下横断ケーブル防護装置による線路下横断ケーブルの防護方法を説明する第４の図である。
【図１９】本発明の一実施形態である線路下横断ケーブル防護装置の固定方法、及びこの線路下横断ケーブル防護装置による線路下横断ケーブルの防護方法を説明する第５の図である。
【図２０】従来の線路下横断ケーブル箇所における軌道の構成を示す図であり、図２０（Ａ）はケーブル防護用ＰＣまくらぎの部分正面図を、図２０（Ｂ）はケーブル防護用ＰＣまくらぎの部分正面図を、図２０（Ｃ）は図２０（Ａ）におけるＡ−Ａ断面図を、それぞれ示している。
【符号の説明】
１ケーブル防護管
１ａ一般部
１ｂ雄ねじ部
１ｃ線状切欠部
１ｄねじ孔
１ｅケーブル収容空間
２防護管固定絶縁構造
３まくらぎ端支持部材
１１切欠閉塞部材
１１ａ本体部
１１ｂ嵌合凹部
１１ｃ底部
２１固定用ナット
２１ａ雌ねじ部
２１ｂナット切欠部
２２固定用座金
２２ａ座金切欠部
２２ｂ防護管収容空間
２３絶縁筒状部材
２３ａ鍔状部
２３ｂ筒状部
２３ｃ第３ケーブル挿入用切欠部
２３ｄ防護管収容空間
２４移動防止部材
２４ａねじ挿通孔
２４ｂ底面
２５取付ねじ
２５ａ頭部
２５ｂ雄ねじ部
２５ｃ十字状凹部
３１第１支持部材
３１ａ垂直部
３１ｂ第１押圧部
３１ｃ円形開口部
３１ｄ、３１ｅボルト用孔
３１ｆ、３１ｇ取付用孔
３１ｈ第１ケーブル挿入用切欠部
３１ｉ、３１ｋ切欠周辺部
３２第２支持部材
３２ａ垂直部
３２ｂ第２押圧部
３２ｃ円形開口部
３２ｄ、３２ｅボルト用孔
３２ｆ、３２ｇ取付用孔
３２ｈ第１ケーブル挿入用切欠部
３２ｉ、３２ｋ切欠周辺部
３３第３支持部材
３３ａ垂直部
３３ｂ水平部
３３ｃ、３３ｄボルト用孔
３４付勢用ばね
３４ａ、３４ｂ端部
３５支持用ボルト
３５ａ軸部
３５ｂばね嵌合部
３５ｃ雄ねじ部
３６支持用ナット
３７第３支持部材取付用ボルト
３８第３支持部材取付用ナット
３９平座金
４０まくらぎ継材取付用ナット
４１第１押圧補助部材
４１ａクサビ部
４１ｂ嵌合部
４１ｃ押え部
４２第２押圧補助部材
４３水平部
４４側壁部
５０ＰＣまくらぎ
６０ケーブル防護用ＰＣまくらぎ
６０ａ、６０ｂケーブル収容凹部
６０ｃボルト用埋込栓
６２〜６４ケーブル防護用カバー
６５〜６７カバー取付用ボルト
１００線路下横断ケーブル防護装置
Ｂバラスト砕石
ｂ１〜ｂ６幅
Ｃケーブル
Ｒレール
Ｓ１第１被圧面
Ｓ２第２被圧面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an under-line crossing cable protection device that protects a cross-line crossing cable that extends across a railroad rail by attaching it to a sleeper, and a protection method for the under-line crossing cable.
[0002]
[Prior art]
In a railway, in order to perform impedance bond wiring provided at both ends of a track circuit, a cable (hereinafter referred to as a “under-traffic crossing cable”) is formed by crossing the lower part of the rail of the railway in a direction substantially perpendicular to the line direction. ) Must be provided. In addition to impedance bonding, it is necessary to arrange a cable under the track when wiring a railroad crossing control device provided at a railroad crossing.
[0003]
In such a case, conventionally, as shown in FIG. 20, a special sleeper 60 called a “cable protection PC sleeper” has been used. In this cable protection PC sleeper 60, the shoulder portions of the sleepers are recessed portions (hereinafter referred to as “cable housing recessed portions”) 60a, 60b, and the cable C can be inserted into the cable housing recessed portions 60a, 60b. It is like that.
[0004]
In addition, the cable protection PC sleeper 60 is embedded with bolt embedded plugs 60c at several places during manufacture of the sleeper. As a result, the cover mounting bolts 65, 66 are formed using the cable protection covers 62, 63, 64 that are formed in a steel plate or the like so as to have a substantially “U” cross-sectional shape and have bolt insertion holes (not shown). , 67 and the like are screwed into the bolt embedded plug 60c through the bolt insertion holes of the cable protection covers 62 to 64, etc., so that the cable protection covers 62 to 64 can be attached to the cable protection PC sleeper 60.
[0005]
The cable protection covers 62 to 64, etc. are attached in the vicinity of places where frequent work is performed by track maintenance machines such as multiple tie tampers, and consideration is given so that the cable C is not damaged or cut by the machines during these work. ing.
[0006]
However, the cable protection PC sleeper 60 as described above has a problem that the material cost is high because it has a special configuration. Furthermore, when a sleeper is replaced, it is a special thing that is different from other standard sleepers, so that there is a problem that the work is different from the standard sleeper and the maintenance work cost is also expensive.
[0007]
In order to solve this problem, the applicants put a cable in the second tubular member made of a hard material, and place the second tubular member in the first tubular member made of a flexible material such as FRP. An under-line crossing cable mounting structure that accommodates and supports the first tubular member by fitting it into the engaging recess of the member supported by the sleeper end (see Japanese Patent Application No. 10-273017) has been proposed.
[0008]
[Problems to be solved by the invention]
However, the above-mentioned cross-cable crossing cable mounting structure described above may be accidentally hit by a tamping tool of a multiple tie tamper and may be damaged thereby. In addition, when the above-described under-track crossing cable mounting structure is applied to an existing under-track crossing cable, at least one of the connection points of the already-under-crossing cable that has already been connected is temporarily removed, and the above second It was necessary to insert through the tubular member or the first tubular member and reconnect. For this reason, the improvement was desired.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to provide a device for crossing a cable under a line and a cable for crossing a line that has high strength against cable breakage and is easy to construct. Is to provide a protection method.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the under-line crossing cable protection device according to the present invention is:
Two sleeper end support members respectively supported by two sleeper ends that are perpendicular to the rail longitudinal direction in the sleepers that support railroad rails and having a circular opening;
A tubular member made of steel and capable of accommodating a cable inside, and arranged so as to extend in the longitudinal direction of the sleeper, and both ends of the tube are inserted into the circular openings of the sleeper end support members. Cable guard pipes fixedly supported on the sleeper end support members by guard pipe fixing means,
First electrical insulation means for electrically insulating the cable protection tube and the sleeper;
A cable crossing cable protection device comprising:
In the cable protection pipe, a part thereof is linearly cut out over the entire length in the longitudinal direction of the pipe, and a linear cutout portion into which the cable can be inserted is formed.
The circular opening is formed with a first cable insertion notch that is a notch where the cable can be inserted.
The protective tube fixing means is formed with a second cable insertion notch that is a notch where the cable can be inserted,
The first electrical insulating means is formed with a third cable insertion notch that is a notch where the cable can be inserted.
It is characterized by.
[0011]
In the above-mentioned cable crossing protection device under the line, preferably, the protective tube fixing means has a male screw portion formed on an outer peripheral surface near both ends of the cable protective tube, and a female screw portion that can be screwed to the male screw portion. Has a fixing nut.
[0012]
Further, in the above-mentioned cable under-line cable protection device, preferably, the first electrical insulating means is an insulating cylindrical member made of a polymer material and formed in a cylindrical shape into which the cable protection tube can be inserted. The insulating cylindrical member is installed so as to be interposed between the circular opening of each sleeper end support member and the cable protection tube.
[0013]
Further, in the above-mentioned cable crossing protection device under the track, preferably, the circular opening of each sleeper end support member has a separation distance for electrical insulation between the cable protection tube and the rail. It is provided at the position.
[0014]
Further, in the above-under-the-line crossing cable protection device, preferably, a fitting portion made of a rubber material and fitted in the linear cutout portion to be detachable from the cable protection pipe, and the linear cutout portion is provided. A notch closing member having a main body portion that prevents the cable housed in the cable protection tube from dropping off by being closed is provided.
[0015]
Moreover, in the above-mentioned track crossing cable protection device, preferably, the notch closing member also serves as second electrical insulation means for electrically insulating the cable protection tube and the sleeper.
[0016]
Further, in the above-mentioned crossing cable protection device under the line, it is preferable that the cable protection tube is attached to the cable protection tube and is fitted to the notch for inserting the first cable to prevent at least rotational movement of the cable protection tube. A prevention member is provided.
[0017]
Moreover, in the above-mentioned cable crossing protection device under the line, preferably,
The sleeper end support member is
A first support member having a first pressing portion capable of pressing a first pressure-receiving surface that is one of the surfaces near the sleeper end portion;
A second support member having a second pressing portion capable of pressing the second pressure-receiving surface which is the other surface of the surface near the sleeper end portion;
The first pressing portion is pressed against the first pressure-receiving surface and the second pressing surface is pressed against the second pressure-receiving surface to fix the first support member and the second support member to the sleeper end. It has a supporting bolt and a supporting nut.
[0018]
Moreover, in the above-mentioned track crossing cable protection device, it is preferable that the first pressure surface is pressed by the first pressing portion and the second pressure portion is pressed by the second pressing surface. It has a biasing member.
[0019]
Moreover, in the above-mentioned under-track crossing cable protection device, preferably, a first intervening between the first pressing portion and the first pressure-receiving surface assists the pressing of the first pressure-receiving surface by the first pressing portion. A first pressing assisting member; and a second pressing assisting member interposed between the second pressing portion and the second pressed surface to assist the pressing of the second pressed surface by the second pressing portion.
[0020]
Moreover, in the above-described track crossing cable protection device, preferably, a third support member is attached to a lower portion of the first support member or the second support member and contacts a bottom surface of the sleeper end portion from below. .
[0021]
Further, according to the present invention, there is provided a protection method for a crossing cable under a track, in which two sleeper end support members having circular openings are connected to a sleeper supporting a railroad rail in a longitudinal direction perpendicular to the rail longitudinal direction. The first step to be attached to the two sleeper ends, and then formed into a tubular shape that is made of steel and can accommodate the cable, and a part thereof is cut out linearly over the entire length in the longitudinal direction of the tube. A cable protection tube formed with a linear notch into which a cable can be inserted is extended in the sleeper longitudinal direction, and the vicinity of both ends of the cable protection tube is formed in each circular opening of each sleeper end support member. A second step of inserting, then, the linear notch, and a first cable insertion notch that is a notch where the cable is inserted and formed in the circular opening, The cable protection tube is fixed to each sleeper end support member. A second cable insertion notch that is formed in the protective tube fixing means and is a notch where the cable can be inserted; Electrically insulates the cable protection tube from the sleeper A third step of allowing the cable to be accommodated inside the cable protection tube and traversing under the track through a third cable insertion notch that is formed in the first electrical insulation means and is a notch where the cable can be inserted; and Both ends of the cable protective tube are fixed to the sleeper end support members by protective tube fixing means, respectively, and a fourth electrical insulating means electrically insulates the cable protective tube from the sleepers. It has the process.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
FIG. 1: is the front view seen in the track | line direction which shows the structure of the crossing cable underline protection device which is one Embodiment of this invention.
[0024]
As shown in FIG. 1, the under-line crossing cable protection device 100 includes a sleeper end support member 3, a cable protection tube 1, and a protection tube fixing insulating structure 2.
[0025]
The sleeper end support member 3 is supported by a bolt or the like, which will be described later, on a sleeper end that is an end in the sleeper longitudinal direction perpendicular to the rail longitudinal direction. The cable protection tube 1 is disposed so as to extend in the sleeper longitudinal direction perpendicular to the rail longitudinal direction, and both ends thereof are supported by the two sleeper end support members 3 and 3, and the cable C Is housed. The cable protection tube 1 is fixed and supported by the sleeper end support members 3 and 3 by a protection tube fixing insulating structure 2.
[0026]
Next, the configuration of the cable protection tube 1 will be described in more detail. FIG. 2 is a diagram showing a more detailed configuration of the cable protection tube in the under-line crossing cable protection device shown in FIG. 1, and FIG. 2 (A) is a longitudinal sectional view in the longitudinal direction of the tube near the end of the cable protection tube. 2 (B) is a cross-sectional view taken along line AA in FIG. 2 (A), and FIG. 2 (C) is a cross-sectional view taken along line BB in FIG. 2 (A).
[0027]
As shown in FIG. 2, the cable protection tube 1 is a tubular member made of steel, and includes a general portion 1a and male screw portions 1b formed near both ends. A male screw is formed on the outer peripheral surface of the male screw portion 1b. In addition, a substantially cylindrical cable housing space 1 e in which the cable C can be housed is provided inside the cable protection tube 1. In addition, the cable protection tube 1 is formed with a slit-like linear notch portion 1c that is partially cut out linearly over the entire length in the longitudinal direction of the tube. The width b1 of the linear notch 1c is set to a value larger than the outer diameter of the cable C. Further, near both ends of the general portion 1a of the cable protection tube 1 (near the boundary with the male screw portion 1b), a screw hole 1d having an internal thread formed on the inner wall is formed.
[0028]
Next, the configuration of the sleeper end support member 3 will be described in more detail. 3 is a diagram showing a more detailed configuration of the under-line crossing cable protection device shown in FIG. 1. FIG. 3 (A) is an enlarged top view of the sleeper end portion in FIG. 1, and FIG. The enlarged side view of the sleeper edge part in FIG. 1 is shown, respectively. 4 is a diagram showing the configuration of a first support member that is a component of the under-line crossing cable protection device shown in FIG. 1, FIG. 4 (A) is a top view, and FIG. 4 (B) is a side view. FIG. 4 (C) shows a front view. 5 is a diagram showing the configuration of the second support member, which is a component of the under-line crossing cable protection device shown in FIG. 1, where FIG. 5 (A) is a top view and FIG. 5 (B) is a front view. FIG. 5C shows a side view. FIG. 6 is a diagram showing a configuration of a third support member that is a component of the under-line crossing cable protection device shown in FIG. 1, FIG. 6 (A) is a top view, and FIG. 6 (B) is a side view. FIG. 6C shows a front view. FIG. 7 is a diagram showing the configuration of an urging spring and a supporting bolt, which are components of the under-line crossing cable protection device shown in FIG. 1, and FIG. 7 (A) is a side view of the urging spring. FIG. 7B shows a side view of the supporting bolt. FIG. 8 is an enlarged view of the first pressing auxiliary member in the track crossing cable protection device according to the embodiment of the present invention.
[0029]
As shown in FIG. 3 and the like, the sleeper end support member 3 includes a first support member 31, a second support member 32, a third support member 33, two support bolts 35 and 35, and two pieces. Support nuts 36, 36, biasing spring 34, two third support member mounting bolts 37, 37, two third support member mounting nuts 38, 38, and four flat plates. Washers 39, 39, 39, 39, a first pressing auxiliary member 41, and a second pressing auxiliary member 42 are provided. 3A and 3B, illustration of the protective tube fixing insulating structure 2 is omitted to avoid complication.
[0030]
In the above description, the biasing spring 34 corresponds to the biasing member in the claims. Next, the configuration of each component of the sleeper end support member 3 will be described.
[0031]
As shown in FIGS. 4 (A), 4 (B), and 4 (C), the first support member 31 is made of steel and has a rectangular plate-shaped vertical portion 31a and a first pressing portion 31b. Yes. The first pressing portion 31b is formed so as to bend from the upper portion of the vertical portion 31a by bending a cut or the like in one plate member or by welding two plate members. Further, the plate surface of the first pressing portion 31b is formed to be perpendicular to the plate surface of the vertical portion 31a.
[0032]
In addition, a circular opening 31c for supporting a cable protection tube 1 described later is formed in the upper part of the vertical part 31a. The circular opening 31c is a cutout having a substantially circular shape. A first cable insertion notch 31h, which is a notch where the cable C can be inserted, is formed obliquely above the circular opening 31c. The portions sandwiching the first cable insertion cutout portion 31h are cutout peripheral portions 31i and 31k. In addition, a bolt hole 31d for attaching a third support member 33 (described later) with a bolt is formed below the vertical portion 31a.
[0033]
On the other hand, near the center of the first pressing portion 31b, a bolt hole 31e for attaching a support bolt 35 described later is opened. In addition, attachment holes 31f and 31g for attaching a first pressing auxiliary member 41 described later are formed in the lower portion of the first pressing portion 31b.
[0034]
As shown in FIGS. 5 (A), 5 (B), and 5 (C), the second support member 32 is made of steel and has a rectangular plate state vertical portion 32a and a second pressing portion 32b. Yes. The second pressing portion 32b is formed so as to bend from the upper portion of the vertical portion 32a by bending a cut or the like in one plate member or by welding two plate members. Further, the plate surface of the second pressing portion 32b is formed to be perpendicular to the plate surface of the vertical portion 32a.
[0035]
In addition, a circular opening 32c for supporting a cable protection tube 1 to be described later is formed in the upper portion of the vertical portion 32a. The circular opening 32c is a cutout having a substantially circular shape. A first cable insertion notch 32h, which is a notch where the cable C can be inserted, is formed obliquely above the circular opening 32c. The portions sandwiching the first cable insertion notch 32h are notch peripheral portions 32i and 32k. In addition, a bolt hole 32d for attaching a third support member 33 (described later) with a bolt is formed below the vertical portion 32a.
[0036]
On the other hand, near the center of the second pressing portion 32b, a bolt hole 32e for attaching a support bolt 35 described later is formed. In addition, attachment holes 32f and 32g for attaching a second pressing auxiliary member 42 to be described later are formed in the lower portion of the second pressing portion 32b.
[0037]
The first support member 31 and the second support member 32 are symmetrical to each other, the vertical portion 31a corresponds to the vertical portion 32a, and the first pressing portion 31b corresponds to the second pressing portion 32b. Yes. Further, the circular opening 31c corresponds to the circular opening 32c. Further, the bolt holes 31d and 31e correspond to the bolt holes 32d and 32e, respectively, and the attachment holes 31f and 31g correspond to the attachment holes 32f and 32g, respectively.
[0038]
As shown in FIGS. 6 (A), 6 (B), and 6 (C), the third support member 33 is made of steel and has a vertical portion 33a and a horizontal portion 33b in a rectangular plate state. The third support member 33 is formed by bending a single plate member or integrally forming such as a rolling process. Further, the plate surface of the horizontal portion 33b is formed to be perpendicular to the plate surface of the vertical portion 33a, and the cross-sectional shape of the third support member 33 is substantially “L” shape. In addition, oblong holes 33c and 33d for bolts that are attached to the first support member 31 and the second support member 32 with bolts are formed in the vertical portion 33a. The third support member mounting bolt 37 is a bolt made of steel. The third support member attaching nut 38 is a nut made of steel and formed in a hexagonal shape. The flat washer 39 is a nut made of steel and formed in a disk shape.
[0039]
As shown in FIG. 7A, the urging spring 34 is a spring made of a linear spring steel material and formed in a coil shape (string winding shape).
[0040]
As shown in FIG. 7B, the support bolt 35 is made of steel and has a columnar shaft portion 35a, a spring fitting portion 35b, and a male screw portion 35c. The spring fitting portion 35b has a spiral groove. For this reason, when the spring fitting portion 35 b is screwed into the end portion 34 a or 34 b of the biasing spring 34, the spiral groove fits inside the end portion 34 a or 34 b of the biasing spring 34. The support nut 36 is a nut made of steel and formed in a hexagonal shape.
[0041]
As shown in FIGS. 3B and 8, the first pressing auxiliary member 41 is made of a synthetic resin material or a rubber-based material, and has a triangular prism-shaped wedge portion 41a and 2 provided on the plane side of the wedge portion 41a. It has two protrusion-like fitting parts 41b and 41b and a pressing part 41c. The inclination angle of the inclined surface of the wedge part 41a is set to a value equal to the inclination angle of the front and rear side surfaces of the sleeper 50 (the side surface that becomes the front surface or the rear surface with respect to the rail longitudinal direction). Further, the bottom surface shape of the presser portion 41 c is formed in a curved surface shape similar to the curved surface of the shoulder portion of the sleeper 50. As shown in FIG. 3B, the second pressing auxiliary member 42 is made of a synthetic resin material or a rubber-based material, and has the same configuration as the first pressing auxiliary member 41.
[0042]
Next, a method of attaching the sleeper end support members 3 and 3 to both sleeper ends of the sleeper 50 and attaching the cable protection tube 1 and the second tubular member 2 to the sleeper end support members 3 and 3. explain.
[0043]
First, the sleeper end support member 3 is attached to the sleeper end portion of the predetermined sleeper 50. For this reason, the space which can scrape out the bedbed crushed stone (ballast) of the sleeper end of the sleeper 50 to be attached, and attach the sleeper end support member 3 to the side and the lower part of the sleeper end of the sleeper 50. create.
[0044]
In parallel with the above operation, a part of the sleeper end support member 3 is assembled in advance. First, the bolt hole 33c of the third support member 33 is matched with the bolt hole 31d of the first support member 31, and similarly, the bolt hole 33d of the third support member 33 is replaced with the bolt of the second support member 32. After matching with the use hole 32d, the third support member 33 is connected to the first support member 31 and the first support member 31 by using two sets of third support member mounting bolts 37, a third support member mounting nut 38, and a plain washer 39. 2 Attach to the support member 32. At this time, since the bolt holes 33c and 33d of the third support member 33 are oblong holes, it is possible to cope with various types of the sleeper 50 having different cross-sectional dimensions.
[0045]
In this case, the lower end of the vertical portion 31a of the first support member 31 is set to coincide with the lower end of the vertical portion 33a of the third support member 33. Similarly, the lower end of the vertical portion 32a of the second support member 32 is set. And the lower end of the vertical portion 33a of the third support member 33 are set to coincide with each other. Accordingly, the first support member 31, the second support member 32, and the third support member 33 are substantially “U” -shaped members when viewed from the side surface of the sleeper 50, as shown in FIG. Thus, as shown in FIG. 1, when viewed from the front side of the sleeper 50, a substantially “F” -shaped structure is obtained.
[0046]
Further, the fitting portions 41 b and 41 b of the first pressing auxiliary member 41 are pushed into and fitted into the mounting holes 31 f and 31 g of the first pressing portion 31 b of the first supporting member 31, so that the first As shown in FIG. 3C, the first pressing auxiliary member 41 is attached inside the pressing portion 31b. Similarly, the 2nd press auxiliary member 42 is attached inside the 2nd press part 32b of the 2nd support member 32. As shown in FIG.
[0047]
Next, among the part of the sleeper end support member 3 formed by the above assembly, the upper surface of the horizontal portion 33b of the third support member 33 is set to the lower surface of the sleeper end portion of the sleeper 50. 1. Contact from below as shown in FIG. At the same time, the inclined surface of the wedge portion 41a of the first pressing auxiliary member 41 is formed as an inclined surface S1 (corresponding to the upper shoulder portion of the front and rear side surfaces of the sleeper 50 as shown in FIGS. 3B and 8). Hereinafter, it is referred to as a “first pressure surface”). Similarly, with respect to the second pressing auxiliary member 42, the inclined surface of the wedge portion (not shown) is the inclined surface S2 corresponding to the upper shoulder portion of the front and rear side surfaces of the sleeper 50 (hereinafter referred to as “second pressurized surface”). (Refer to FIG. 3B).
[0048]
In parallel with the above operation, the spring fitting portion 35b of one of the two support bolts 35 is screwed into the inside of one end portion 34a of the biasing spring 34, and the spring fitting portion 35b is spiraled. The groove is fitted to the inner wall of the end 34 a of the biasing spring 34. Similarly, the spring fitting portion 35b of the other support bolt 35 of the two is screwed into the other end portion 34b of the biasing spring 34, and the spiral groove of the spring fitting portion 35b is formed. The urging spring 34 is fitted to the inner wall of the other end 34b. As a result, the supporting bolts 35 and 35 are attached to both ends 34a and 34b of the biasing spring 34 to form a spring-loaded bolt.
[0049]
Next, as shown in FIGS. 3 (A) and 3 (B), one end of the male thread portion 35c, which is the end of the spring-loaded bolt formed as described above, is in contact with the sleeper 50. The second support member is inserted into the bolt hole 31e of the first pressing portion 31b of the first support member 31 and the other end of the male screw portion 35c serving as the end portion of the spring-loaded bolt is in contact with the sleeper 50. After inserting into the bolt hole 32e of the 2nd press part 32b of the member 32, and inserting the plain washer 39 in each, the support nut 36 is screwed and tightened in each.
[0050]
The bolt tightening force acts on the first pressure-receiving surface S1 of the upper shoulder portion of the front and rear side surfaces of the sleeper 50 from the first pressing portion 31b of the first support member 31 through the first pressing auxiliary member 41, thereby The pressure surface S1 is tightened. On the other hand, similarly, the bolt tightening force acts on the second pressure-receiving surface S2 of the upper shoulder portion of the front and rear side surfaces of the sleeper 50 from the second pressing portion 32b of the second support member 32 through the second pressing auxiliary member 42. The second pressure surface S2 is tightened. By this tightening action, the sleeper end support member 3 is fixed and supported by the sleeper end portion of the sleeper 50. In this manner, as shown in FIG. 1, the sleeper end support members 3 are attached to one end of the sleeper 50 and the other end of the sleeper 50, respectively.
[0051]
When the sleeper end support members 3 and 3 are attached to the sleeper end portions of the sleeper 50 in this way, as shown in FIG. 1, the lower portion of the vertical portion 31a of the first support member 31 and the third support The lower part of the vertical portion 33a of the member 33 is integrated by a third support member mounting bolt 37 or the like and inserted into the ballast crushed stone B. For this reason, this part receives the pressure from the surrounding ballast crushed stone B, and it is prevented that the sleeper 50 shifts | deviates to a horizontal direction by this pressure. Similarly, the lower portion of the vertical portion 32a of the second support member 32 and the lower portion of the vertical portion 33a of the third support member 33 are integrated by a third support member mounting bolt 37 or the like and inserted into the ballast crushed stone B. Then, the sleeper 50 is prevented from shifting in the horizontal direction by receiving pressure from the surrounding ballast crushed stone B in this portion. Here, the lower part of the vertical part 31a of the integrated first support member 31 and the lower part of the vertical part 33a of the third support member 33 constitute an intrusion part. Similarly, the lower part of the vertical part 32a of the integrated second support member 32 and the lower part of the vertical part 33a of the third support member 33 constitute an intrusion part.
[0052]
The steps so far correspond to the first step in the claims.
[0053]
Next, the cable protection tube 1 is fixed to the sleeper end support members 3 and 3 by the protection tube fixing and insulating structure 2. Prior to this description, the configuration of the protection tube fixing and insulating structure 2 in FIG. Will be described in more detail.
[0054]
FIG. 9 is a diagram showing a more detailed configuration of the protective tube fixing insulating structure in the under-line crossing cable protective device shown in FIG. As shown in FIG. 9, the protective tube fixing insulating structure 2 includes a male screw portion 1 b formed at both ends of the protective tube 1, a fixing nut 21, a fixing washer 22, an insulating cylindrical member 23, and movement prevention. A member 24 and a mounting screw 25 are provided. Next, the structure of each component of the above-described protective tube fixing insulating structure 2 will be described.
[0055]
FIG. 10 is a diagram showing a configuration of a fixing nut that is a component part of the under-track crossing cable protection device shown in FIG. 1, FIG. 10 (A) is a front view, FIG. 10 (B) is a side view, Each is shown. 11 is a diagram showing a configuration of a fixing washer that is a component of the under-line crossing cable protection device shown in FIG. 1, FIG. 11 (A) is a front view, and FIG. 11 (B) is a side view. Respectively. 12 is a diagram showing a configuration of an insulating cylindrical member which is a component of the under-line crossing cable protection device shown in FIG. 1, FIG. 12 (A) is a front view, and FIG. 12 (B) is a side view. Each figure is shown. Moreover, FIG. 14 is a figure which shows the structure of the movement prevention member which is a component of the crossing cable protection apparatus under a track | line shown in FIG. 1, and its attachment screw, FIG.14 (A) is a top view of a movement prevention member, FIG. 14B is a front view of the movement preventing member, and FIG. 14C is a side view of the mounting screw. 9 to 14 are illustrated at the same scale, and the relative dimensional relationship of each component is equal to that in an actual case.
[0056]
As shown in FIG. 10, the fixing nut 21 has a hexagonal cross section, and an internal thread 21a is formed on the inner wall surface. The female threaded portion 21b can be screwed into a male threaded portion 1b formed on the outer peripheral surface near both ends of the cable protection tube 1. A nut notch 21 b is formed on the side of the fixing nut 21. The notch width b2 of the nut notch 21b is equal to or greater than the width of the linear notch 1c of the cable protection tube 1.
[0057]
As shown in FIG. 11, the fixing washer 22 is a flat washer having a substantially circular cross section, and a washer notch 22 a is formed on the side of the fixing washer 22. The width b3 of the notch of the washer notch 22a is equal to or larger than the width of the linear notch 1c of the cable protection tube 1. The fixing washer 22 has a substantially disk-shaped protective tube housing space 22b into which the cable protective tube 1 can be inserted.
[0058]
As will be described later, the nut notch 21b and the washer notch 22a constitute a second cable insertion notch in the claims.
[0059]
In addition, as shown in FIG. 12, the insulating cylindrical member 23 is made of a polymer material having electrical insulation properties such as plastic material, fiber teaching plastic material (FRP), such as ABS resin, and the whole is substantially cylindrical. It is a formed member. The insulating cylindrical member 23 has a flange-like portion 23a protruding outward and a cylindrical portion 23b. The insulating cylindrical member 23 has a substantially cylindrical protective tube housing space 23d into which the cable protective tube 1 can be inserted. In addition, a third cable insertion notch 23c, which is a notch, is formed on the side of the insulating cylindrical member 23. The notch width b4 of the third cable insertion notch 23c is equal to or larger than the width of the linear notch 1c of the cable protection tube 1.
[0060]
As shown in FIG. 9, the insulating cylindrical member 23 is installed so as to be interposed between the circular opening portion 32 c of each sleeper end support member 3 and the cable protection tube 1, and the cable protection tube 1 and the sleeper 50. Is electrically insulated from each other. The insulating cylindrical member 23 corresponds to the first electrical insulating means in the claims.
[0061]
Further, as shown in FIG. 14, the movement preventing member 24 is made of a polymer material having electrical insulation properties such as plastic material, fiber teaching plastic material (FRP), such as ABS resin, and is formed in a substantially rectangular parallelepiped shape as a whole. It is a member made. The movement preventing member 24 has a substantially cylindrical screw insertion hole 24a and a bottom surface 23b which is a concave surface forming a part of a cylindrical surface. Further, the width b6 of the short side of the movement preventing member 24 is a value smaller than the width of the linear notch 1c of the cable protection tube 1.
[0062]
The mounting screw 25 has a substantially dish-shaped head portion 25a and a male screw portion 25b in which a male screw is formed on the outer peripheral surface. A cross-shaped recess 25c is formed on the upper surface of the head 25a. The male screw of the male screw portion 25 b can be inserted into the screw insertion hole 24 a of the movement preventing member 24, and can be screwed with the female screw on the inner wall of the screw hole 1 d of the cable protection tube 1.
[0063]
As shown in FIG. 9, the movement preventing member 24 has a short side (width b6 portion) that is secured to the cable protection tube 1 by screwing the mounting screw 25 and the screw hole 1 d of the cable protection tube 1. The cable protection tube 1 is attached to the outside of the cable protection tube 1 so as to be a front edge and a rear edge in the longitudinal direction of the cable, and is fitted with the first cable insertion notch 32h, so that the cable protection tube 1 becomes the central axis of the tube. Prevents rotational movement around.
[0064]
As shown in FIG. 9, the male threaded portion 1b of the cable protection tube 1 and the fixing nut 21 are screwed together, and the fixing washer 22 and the insulating cylindrical member 23 are connected to the notch peripheral portions 32i and 32k of the second support member. It is pressed and fixed to the sleeper end support member 3. Therefore, they constitute the protective tube fixing means in the claims.
[0065]
Next, a method for fixing the cable protection tube 1 to the sleeper end support members 3 and 3 by the protection tube fixing insulating structure 2 will be described in detail with reference to FIGS. 3, 9, and 15 to 18. Give an explanation. FIGS. 15 to 18 are diagrams for explaining a fixing method of the under-line crossing cable protection device 100 and a protection method for the under-line crossing cable protection device 100 by the under-line crossing cable protection device 100.
[0066]
First, the movement preventing member 24 is attached to the cable protection tube 1 with the mounting screws 25, 25. Next, as shown in FIG. 15A, the cable protection tube 1 to which the movement preventing member 24 is attached is inserted into the circular opening 32 c of the sleeper end support member 3. In FIG. 15A, 32i and 32k indicate notch peripheral portions of the vertical plate 32a that sandwich the first cable insertion notch 32h. Further, the insertion is further performed in the direction D1 so that the movement preventing member 24 passes through the first cable insertion notch 32h that is a notch portion obliquely above the circular opening 32c. This step corresponds to the second step in the claims.
[0067]
Next, the cable protection tube 1 is rotated about its axis in the direction D2 shown in FIGS. 15 (A) and 15 (B). As a result, as shown in FIG. 15B, the linear notch 1c of the cable protection tube 1 and the first cable insertion notch 32h of the sleeper end support member 3 are overlapped.
[0068]
Next, as shown in FIG. 16 (A), the insulating cylindrical member 23 is inserted from both ends of the cable protection tube 1 with the cylindrical portion 23b at the top, then the fixing washer 22 is inserted, and finally The fixing nut 21 is screwed. Then, the insulating cylindrical member 23, the fixing washer 22, and the fixing nut 21 are appropriately rotated to form a third cable insertion notch 23c, a washer notch 22a, and a nut notch 21b, which are notches. Then, the cable protection tube 1 is overlapped with the linear notch 1c. In this case, the washer notch 22a and the nut notch 21b constitute a second cable insertion notch in the claims.
[0069]
Next, as shown in FIG. 16B, the cable C is passed through the third cable insertion notch 23c, the washer notch 22a, the nut notch 21b, and the linear notch 1c. It is housed inside (cable housing space 1e). As a result, the cable C is disposed across the line. Further, even in the case of an existing underline crossing cable, it is only necessary to pass the above-described notches 23c, 22a, 21b, and 1c, so there is no need to remove the connection point of the already connected underline crossing cable. Construction is extremely easy. The steps so far correspond to the third step in the claims.
[0070]
However, in this state, the cable C may fall out from the cable protection tube 1 to the outside. For this reason, the under-track crossing cable protection device 100 of the present embodiment includes a notch closing member 11 as shown in FIG. The notch closing member 11 is made of a rubber-based material such as synthetic rubber, and has a main body portion 11a, a fitting concave portion 11b, and a bottom portion 11c. The fitting recess 11b is a recess provided on both sides, and the distance (width) b5 between the inner walls of the recess is slightly larger than the width of the linear notch 1c of the cable protection tube 1. Yes. Further, the width of the bottom portion 11c is considerably larger than the width of the linear cutout portion 1c. With such a configuration, the fitting recess 11b and the bottom 11c are fitted into the linear notch 1c by the elasticity of the rubber-based material. Further, the width of the main body 11a is considerably larger than the width of the linear notch 1c, and the linear notch 1c can be closed. Therefore, if the notch closing member 11 is attached to the cable protection tube 1 as shown in FIG. 13, it is possible to prevent the cable C accommodated in the cable protection tube 1 from dropping off. In this case, the fitting concave portion 11b and the bottom portion 11c constitute a fitting portion in claims.
[0071]
FIG. 17 illustrates a method of attaching the notch closing member 11 to the cable protection tube 1. As shown in FIG. 17, when the notch closing member 11 is bent and the arrow portion in the figure is pressed, the bottom 11 c is compressed by the elasticity of the rubber-based material, and the linear notch 1 c of the cable protection tube 1 is moved. After that, it is inserted into the cable housing space 1e, and the fitting recess 11b is fitted to the protruding ends on both sides constituting the linear notch 1c. Thereby, it will be in the state of the cross-sectional view of FIG.
[0072]
FIG. 18A shows a state in which the notch closing member 11 is attached to the linear notch 1c of the cable protection tube 1 after the state of FIG. 16B. As shown in FIG. 18A, the notch closing member 11 has a length up to the vicinity of the movement preventing member 24. As shown in FIG. 9, since the movement preventing member 24 is finally in a state of fitting with the first cable insertion notch 32h, the end of the notch closing member 11 is an insulating cylindrical member. This is so as not to interfere with the end of 23.
[0073]
Next, the cable protection tube 1 is rotated about its axis in a direction D3 shown in FIGS. 18 (A) and 18 (B). As a result, as shown in FIG. 18B, the movement preventing member 24 attached to the cable protection tube 1 and the first cable insertion notch 32h of the sleeper end support member 3 face each other.
[0074]
Next, as shown in FIG. 18 (B), the cable protection tube 1 to which the movement preventing member 24 is attached is moved in the direction D4, and the movement preventing member 24 is used for inserting the first cable of the sleeper end support member 3. Insert into the notch 32h. Next, the fixing nut 21 is rotated in either direction and tightened. As a result, the fixing nut 21, the fixing washer 22, and the insulating cylindrical member 23 move toward the right in FIG. 18B. At this time, the third cable insertion notch 23 c of the insulating cylindrical member 23 remains in a state of facing the movement preventing member 24. Thereby, the cylindrical portion 23b of the insulating cylindrical member 23 is inserted into the gap between the circular opening 32c and the cable protection tube 1, while the movement preventing member 24 is inserted into the third cable of the insulating cylindrical member 23. It also enters the notch 23c for use. If the fixing nut 21 is further tightened in this state, the state shown in FIG. 9 is obtained, and the cable protection tube 1 is fixed to the sleeper end support member 3. At the same time, the cable protection tube 1 and the sleeper end support member 3 are electrically insulated by the interposed insulating cylindrical member 23. Therefore, the cable protection tube 1 and the sleeper 50 are electrically insulated. The steps so far correspond to the fourth step in the claims.
[0075]
In this state, as shown in FIG. 3 (B), the circular openings 31c and 32c of each sleeper end support member 3 are arranged to be lowered to the vicinity of the center portion of the sleeper 50, and the cable A required separation distance required for electrical insulation is secured between the protective tube 1 and the rail R (see FIG. 1).
[0076]
Further, when this state is seen in a cross-sectional view, it is as shown in FIG. That is, the notch closing member 11 made of a rubber material is sandwiched between the sleeper 50 and the cable protection tube 1, and the main body portion 11 a of the notch closing member 11 comes into contact with the side surface of the sleeper 50. ing. For this reason, the cable protection tube 1 and the sleeper 50 are also electrically insulated by the notch closing member 11. In this case, the notch closing member 11 corresponds to the second electrical insulating means in the claims.
[0077]
The above description with reference to FIGS. 15 to 18 has been made with respect to the attachment and fixing at one end of the cable protection tube 1, but the attachment and fixing at the other end of the cable protection tube 1 are exactly the same as described above. It is. Specifically, the circular opening 32c in the above description may be read as 31c, the first cable insertion cutout 32h as 31h, and the cutout peripheral portions 32i and 32k as 31i and 31k, respectively.
[0078]
The under-line crossing cable protection device 100 of the present embodiment configured as described above has the following advantages.
[0079]
(1) Since the cable protection pipe 1 is a steel pipe, it has high strength and is not damaged even by hitting with a tamping tool or the like of a track maintenance machine, and the safety of the cable accommodated therein is high.
[0080]
(2) Moreover, since each notch 1c etc. are provided, it is not necessary to remove the existing cable and can be accommodated in the cable protective tube 1 as it is. Construction is possible.
[0081]
(3) Since the sleeper 50 to which the cable C is attached may be a standard sleeper, the material (product) cost can be greatly reduced as compared with a conventional cable protection PC sleeper.
[0082]
(4) Since the sleeper 50 to which the cable C is attached may be a standard sleeper, the sleeper replacement work can be performed uniformly, and the maintenance work cost can be reduced.
[0083]
(5) Since the sleeper end support member 3 has a structure that can be easily attached to and detached from the sleeper end, the efficiency of maintenance work is improved.
[0084]
(6) The arrangement position of the circular openings 31h and 32, the insulating cylindrical member 23, and the notch closing member 11 can prevent a short circuit between the rail and the sleeper, and can reliably prevent a signal failure or the like.
[0085]
(7) Since the sleeper end support member 3 can be attached to the sleeper 50 by tightening the sleeper 50 by the tightening force of the support bolt 35, a hole for attachment is drilled in the sleeper 50, etc. Processing is not required, the attachment work is easy, and the strength of the sleeper 50 to be attached is not reduced.
[0086]
(8) An urging spring 34 is attached to the supporting bolts 35, 35, and a tensile force is applied to each of the supporting bolts 35, 35 by the elastic action of the urging spring 34. Accordingly, the first pressed surface S1 of the sleeper 50 is pressed from the first pressing portion 31b of the first supporting member 31 through the first pressing auxiliary member 41, and the second pressing portion 32b of the second supporting member 32 is pressed from the second pressing portion 32b. Energized so as to press the second pressure-receiving surface S2 of the sleeper 50 through the two pressing auxiliary member 42, and the inner surface of the support nut 36 is the outer surface of the first pressing portion 31b of the first supporting member 31 and It is always pressed against the outer surface of the second pressing portion 32b of the second support member 32. For this reason, the support nut 36 is prevented from being loosened by train vibration or the like.
[0087]
(9) Since each member of the under-track crossing cable protection device 100 can use steel materials, steel plates, coil springs, bolts, nuts, steel pipes, plastic pipes, etc. that are widely used as civil engineering and construction materials. It is very convenient. Also, since the processing for each member does not require special processing, the manufacturing cost is low.
[0088]
(10) In this under-track crossing cable protection device 100, the portion protruding from the bedrock crushed stone intermediate between the sleeper 50 and the sleeper 50 is about the support nut 36, so that the work of the track maintenance machine is disturbed. Never become.
[0089]
The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.
[0090]
For example, in the above embodiment, the method of attaching the movement preventing member 24 to the cable protection tube 1 in advance and then fixing the movement preventing member 24 to the sleeper end support member 3 has been described as an example. However, the present invention is not limited to this. Instead, other methods, for example, the movement preventing member 24 may be attached later by the attachment screw 25 after having the positional relationship shown in FIG.
[0091]
Moreover, in the said embodiment, although demonstrated using the structure which uses a coil-shaped spring as an urging | biasing member as an example, this invention is not limited to this, The structure which does not use an urging | biasing member may be sufficient. .
[0092]
Moreover, when using an urging | biasing member, it is not limited only to a coil-shaped spring, A leaf | plate spring, a bamboo shoot-like spring, etc. may be sufficient. Moreover, it is not limited only to a tension spring, A compression spring may be sufficient. When the compression spring is used as the urging member, for example, it is arranged inside the first pressing portion 31b and the second pressing portion 32b so as to apply a compressive force to the first pressing portion 31b and the second pressing portion 32b. What is necessary is just to comprise.
[0093]
Moreover, in the said embodiment, although demonstrated as an example the inclined surface of the upper shoulder part of the front-and-back side surface of a sleeper edge part as a 1st to-be-pressed surface and a 2nd to-be-pressed surface, this invention is limited to this. Alternatively, the other surface of the sleeper may be pressed and tightened as the first pressure-receiving surface and the second pressure-receiving surface. For example, the upper surface and the lower surface of the sleeper end may be pressed and tightened as the first pressure surface or the second pressure surface. In this case, a 1st press part or a 2nd press part is arrange | positioned in the position facing the upper surface or lower surface of a sleeper edge part, and an urging | biasing member is arrange | positioned in the perpendicular direction.
[0094]
As another form, the central portion of the slope on the front and rear side surfaces of the sleeper end is pressed and tightened as the first pressure surface and the second pressure surface, or the lower portion of the slope on the front and rear side surfaces of the sleeper end portion is The first pressure surface and the second pressure surface may be pressed and tightened. In this case, the first pressing portion or the second pressing portion is disposed in the vicinity of the center portion on the outer side of the end surface of the sleeper end portion or in the vicinity of the lower portion on the end surface side of the sleeper end portion, and the biasing member is the sleeper. It arrange | positions in the horizontal direction outside the end surface of an edge part.
[0095]
Moreover, in the said embodiment, although the member which has the part of a triangular cross section was mentioned as an example and demonstrated as a 1st press auxiliary member and a 2nd press auxiliary member, this invention is not limited to this, Other structures For example, a member having a trapezoidal cross section may be used.
[0096]
【The invention's effect】
As described above, according to the present invention, since the steel cable protection tube is used, the strength against cable breakage is high, the cable protection tube is provided with a linear notch, and the sleeper end support member has the first cable. Since the insertion notch is provided with the second cable insertion notch in the protective tube fixing means and the third cable insertion notch in the first electrical insulation means, disconnect the existing connection even with the existing cable under the track. There is an advantage that the housing construction can be easily performed.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of a configuration of a cross line underline cable protection device according to an embodiment of the present invention viewed in a line direction.
2 is a diagram showing a more detailed configuration of a cable protection tube in the cable crossing cable protection device shown in FIG. 1; FIG. 2 (A) is a longitudinal sectional view in the longitudinal direction of the tube near the end of the cable protection tube; 2 (B) is a cross-sectional view taken along line AA in FIG. 2 (A), and FIG. 2 (C) is a cross-sectional view taken along line BB in FIG. 2 (A).
3 is a diagram showing a more detailed configuration of the under-line crossing cable protection device shown in FIG. 1. FIG. 3 (A) is an enlarged top view of a sleeper end portion in FIG. 1, and FIG. The enlarged side view of the sleeper edge part in FIG. 1 is shown, respectively.
4 is a diagram showing a configuration of a first support member that is a component part of the under-track crossing cable protection device shown in FIG. 1, FIG. 4 (A) is a top view, and FIG. 4 (B) is a side view. FIG. 4C shows a front view, respectively.
5 is a diagram showing a configuration of a second support member that is a component part of the under-track crossing cable protection device shown in FIG. 1. FIG. 5 (A) is a top view, and FIG. 5 (B) is a front view. FIG. 5C shows side views, respectively.
6 is a diagram showing a configuration of a third support member that is a component part of the under-track crossing cable protection device shown in FIG. 1. FIG. 6 (A) is a top view, and FIG. 6 (B) is a side view. FIG. 6C shows a front view, respectively.
7 is a diagram showing a configuration of an urging spring and a supporting bolt that are components of the under-line crossing cable protection device shown in FIG. 1, and FIG. 7 (A) is a side view of the urging spring; FIG. 7B shows a side view of the supporting bolt.
FIG. 8 is an enlarged view of a first pressing auxiliary member in the under-track crossing cable protection device according to the embodiment of the present invention.
FIG. 9 is a diagram showing a more detailed configuration of a protective tube fixing insulating structure in the under-line crossing cable protective device shown in FIG. 1;
10 is a diagram showing a configuration of a fixing nut that is a component part of the under-track crossing cable protection device shown in FIG. 1. FIG. 10 (A) is a front view, FIG. 10 (B) is a side view, Each is shown.
11 is a diagram showing a configuration of a fixing washer that is a component part of the under-track crossing cable protection device shown in FIG. 1. FIG. 11 (A) is a front view, FIG. 11 (B) is a side view, Each is shown.
12 is a diagram showing a configuration of an insulating cylindrical member that is a component part of the under-track crossing cable protection device shown in FIG. 1. FIG. 12 (A) is a front view, and FIG. 12 (B) is a side view. , Respectively.
13 is a cross-sectional view showing a configuration of a notch closing member that is a component of the under-line-crossing cable protection device shown in FIG. 1;
14 is a diagram showing a configuration of a movement preventing member and its mounting screw, which are components of the under-track crossing cable protection device shown in FIG. 1, and FIG. 14 (A) is a top view of the movement preventing member, and FIG. (B) is a front view of the movement preventing member, and FIG. 14 (C) is a side view of the mounting screw.
FIG. 15 is a first view for explaining a fixing method of the under-line crossing cable protection device and a protecting method for the under-line crossing cable by this under-line crossing cable protection device according to an embodiment of the present invention.
FIG. 16 is a second view for explaining a fixing method of the under-line crossing cable protection device and a protecting method of the under-line crossing cable by this under-line crossing cable protection device according to an embodiment of the present invention.
FIG. 17 is a third view for explaining a fixing method of the under-line crossing cable protection device and a protecting method for the under-line crossing cable by this under-line crossing cable protection device according to an embodiment of the present invention.
FIG. 18 is a fourth diagram illustrating a fixing method for a cross-line crossing cable protection device according to an embodiment of the present invention and a protection method for the cross-line crossing cable protection device using the cross-line crossing cable protection device.
FIG. 19 is a fifth diagram for explaining a fixing method of the under-line crossing cable protection device and a protecting method of the under-line crossing cable by this under-line crossing cable protection device according to an embodiment of the present invention.
20A and 20B are diagrams showing a configuration of a track at a conventional cable crossing section under a track, in which FIG. 20A is a partial front view of a cable protection PC sleeper, and FIG. 20B is a cable protection PC sleeper. FIG. 20C is a partial front view, and FIG. 20C is a sectional view taken along line AA in FIG.
[Explanation of symbols]
1 Cable protection tube
1a General Department
1b Male thread
1c linear notch
1d screw hole
1e Cable housing space
2 Protection tube fixed insulation structure
3 sleeper end support members
11 Notch closure member
11a body
11b Fitting recess
11c bottom
21 Fixing nut
21a Female thread
21b Nut notch
22 Washers for fixing
22a Washer notch
22b Protective tube storage space
23 Insulated cylindrical member
23a bowl
23b Tubular part
23c Notch for inserting third cable
23d Protective tube storage space
24 Movement prevention member
24a Screw insertion hole
24b Bottom
25 mounting screws
25a head
25b Male thread
25c Recessed cross
31 First support member
31a Vertical section
31b 1st press part
31c Circular opening
31d, 31e Bolt hole
31f, 31g Mounting holes
31h First cable insertion notch
31i, 31k Notch periphery
32 Second support member
32a Vertical section
32b 2nd press part
32c circular opening
32d, 32e Bolt hole
32f, 32g Mounting hole
32h First cable insertion notch
32i, 32k Notch periphery
33 Third support member
33a Vertical section
33b Horizontal part
33c, 33d Bolt hole
34 Biasing spring
34a, 34b end
35 Support bolt
35a Shaft
35b Spring fitting part
35c Male thread
36 Supporting nut
37 Third support member mounting bolt
38 Third support member mounting nut
39 Flat washer
40 Nuts for mounting sleeper joints
41 First pressing auxiliary member
41a wedge part
41b Fitting part
41c Presser part
42 Second pressing auxiliary member
43 Horizontal
44 Side wall
50 PC sleeper
60 PC sleeper for cable protection
60a, 60b Cable housing recess
60c bolt embedded plug
62-64 Cable protective cover
65-67 Cover mounting bolt
100 Crossing cable protection device under the track
B Ballast crushed stone
b1-b6 width
C cable
R rail
S1 First pressure surface
S2 Second pressure surface

Claims

Two sleeper end support members each having a circular opening and supported by two sleeper ends that are perpendicular to the rail longitudinal direction in the sleepers that support railroad rails, and steel It is a tubular member that can accommodate a cable inside and is arranged so as to extend in the longitudinal direction of the sleeper, and both ends of the tube are inserted into the circular openings of the sleeper end support members. A cable protection pipe fixed to and supported by each sleeper end support member by a protection pipe fixing means, and a line including first electrical insulation means for electrically insulating between the cable protection pipe and the sleeper. A lower crossing cable protection device, wherein a part of the cable protection pipe is cut out linearly over the entire length in the longitudinal direction of the pipe to form a linear cutout portion into which the cable can be inserted. The circular opening is formed with a first cable insertion notch which is a notch where the cable can be inserted, and the protective tube fixing means is a second notch where the cable can be inserted. A cable undercut cable protection device, wherein a cable insertion notch is formed, and a third cable insertion notch is formed in the first electrical insulating means, which is a notch where the cable can be inserted. .

2. The under-track crossing cable protection device according to claim 1, wherein the protection tube fixing means includes a male screw portion formed on an outer peripheral surface near both ends of the cable protection tube, and a female screw portion that can be screwed to the male screw portion. An under-line crossing cable protection device characterized by having a fixing nut.

2. The cable-under-track cable protection device according to claim 1, wherein the first electrical insulating means is an insulating cylindrical member made of a polymer material and formed into a cylindrical shape into which the cable protection tube can be inserted. The under-line crossing cable protection device, wherein the insulating tubular member is installed so as to be interposed between the circular opening of each sleeper end support member and the cable protection tube.

2. The under-line crossing cable protection device according to claim 1, wherein the circular opening of each sleeper end support member is a position where a separation distance for electrical insulation is secured between the cable protection tube and the rail. A cable crossing protection device under a track, characterized in that it is provided in a cable.

The under-line crossing cable protection device according to claim 1, which is made of a rubber-based material and is fitted into the linear cutout portion so as to be detachable from the cable protection pipe, and the linear cutout portion is closed. And a notch closing member having a main body portion for preventing the cable housed in the cable protective tube from dropping off.

6. The under-cable crossing cable protection device according to claim 5, wherein the notch closing member also serves as second electrical insulation means for electrically insulating the cable protection tube and the sleeper. Crossing cable protection device.

The under-track crossing cable protection device according to claim 1, wherein the movement protection member is attached to the cable protection pipe, and prevents at least rotational movement of the cable protection pipe by fitting with the first cable insertion notch. A cable crossing protection device under the track, comprising:

2. The under-track crossing cable protection device according to claim 1, wherein the sleeper end support member includes a first pressing portion capable of pressing a first pressure-receiving surface that is one of the surfaces in the vicinity of the sleeper end portion. 1st support member, the 2nd support member which has the 2nd press part which can press the 2nd to-be-pressed surface which is the other side of the surface near the sleeper edge part, and the 1st press part makes the 1st And a support bolt and a support nut for pressing the second pressure surface and pressing the second pressure surface by the second pressure surface to fix the first support member and the second support member to the sleeper end. A cable crossing protection device under the track.

The under-track crossing cable protection device according to claim 8, wherein the first pressing portion presses the first pressure-receiving surface and the second pressing surface presses the second pressure-receiving portion. An under-cable crossing cable protection device comprising a member.

The under-track crossing cable protection device according to claim 8, wherein the first pressing portion is interposed between the first pressing portion and the first pressed surface and assists the pressing of the first pressed surface by the first pressing portion. An auxiliary member, and a second pressing auxiliary member that is interposed between the second pressing portion and the second pressed surface and assists the pressing of the second pressed surface by the second pressing portion. Under-track crossing cable protection device.

The under-track crossing cable protection device according to claim 8, further comprising a third support member that is attached to a lower portion of the first support member or the second support member and contacts the bottom surface of the sleeper end portion from below. A traverse cable protection device under the feature.

A first step of attaching two sleeper end support members having a circular opening to two sleeper ends that are perpendicular to the rail longitudinal direction in a sleeper that supports a railroad rail; Next, the cable protection is made of steel and is formed into a tubular shape that can accommodate the cable, and a part thereof is linearly cut out over the entire length in the longitudinal direction of the tube to form a linear cutout portion into which the cable can be inserted. A second step of extending the pipe in the longitudinal direction of the sleeper and inserting the vicinity of both ends of the cable protection pipe through the circular openings of the sleeper end support members; and then, the linear notch, a first cable insertion notch the circular opening can be inserted notched portion of the cable is formed, protective fixing the cable protection tube to the each sleeper end support member A second cable insertion notch formed in the fixing means is insertable cutout portion of said cable, said cable being formed on the first electrically insulating means for electrically insulating the said and the cable protection tube sleepers The third step of accommodating the cable inside the cable protective tube through the third cable insertion notch, which is an insertable notch, and traversing under the track, and both ends of the cable protective tube are respectively connected to the protective tube. Crossing below the line characterized by having a fourth step of fixing to each sleeper end support member by fixing means and electrically insulating between the cable protection tube and the sleepers by first electrical insulation means. Cable protection method.