JP3908024B2

JP3908024B2 - Magnetically levitated linear motor car track

Info

Publication number: JP3908024B2
Application number: JP2001379097A
Authority: JP
Inventors: 征規竹内; 五郎長尾; 正元首藤; 寿加藤
Original assignee: Topy Industries Ltd
Current assignee: Topy Industries Ltd
Priority date: 2001-12-12
Filing date: 2001-12-12
Publication date: 2007-04-25
Anticipated expiration: 2021-12-12
Also published as: JP2003184005A

Description

【０００１】
【発明の属する技術分野】
本発明は、磁気浮上式リニアモーターカーシステムの軌道に関し、特に枕木締結構造の改良に関する。
【０００２】
【従来の技術】
磁気浮上式のリニアモータカーシステムのように、レールが枕木から飛び出すように配置される場合には、安全のためにレールを枕木にしっかりと固定する必要がある。この場合に、温度変化に伴うレールの伸縮や軌道桁の活荷重たわみによるレールの変位に起因して、レールと、枕木と、レールを枕木に固定する固定構造と、枕木を軌道桁に締結する締結構造に過大な負荷が作用してしまう。そのため、特開平９−２６８５０６号公報に示す枕木締結構造では、枕木と軌道桁側との間で上記レール変位を吸収するようにしている。
【０００３】
上記公報の枕木締結構造について、図７を参照しながら説明する。枕木２’はＨ型鋼からなり、左右一対の枕木締結構造Ａ’（一方のみ示す）によって、軌道桁１’に締結されている。各枕木締結構造Ａ’は、軌道桁１’に設けられた支持部１０’を有している。この支持部１０’は、軌道桁１’の上面から突出するように設けられたモルタル製の台座１１’と、台座１１’の上に設置されたベースプレート１２’と、台座１１’に垂直に埋め込まれた棒形状をなすアンカーナット１３’とを有している。このアンカーナット１３’にねじ込まれた固定ボルト１５’によってベースプレート１２’が台座１１’に固定されている。
【０００４】
上記枕木２’の下側フランジ部２０’は、ゴム板７１’を介してベースプレート１２’に載っている。さらに、下側フランジ部２０’の幅方向の両側部には、それぞれゴム板８１’，座金９０’が載っている。下側フランジ部２０’の両側部に形成された貫通孔にはゴム筒９５’が収容され、さらにその内側にはスリーブ９２’が収容されている。そして、締結ボルト９１’が、座金９０’とスリーブ９２’を貫通してベースプレート１２’にねじ込まれることにより、枕木２’が締結されている。この際、締付ボルト９１’が締付力をもってねじ込まれ、この締め付け力により、積層状態にあるゴム板７１’，下側フランジ部２０’，ゴム板８１’，座金９０’が、ベースプレート１２’に向けて押し付けられる。この状態でゴム板７１’、８１’は圧縮されるが、この圧縮量は上記スリーブ９２’により規制される。また、締付ボルト９１’の締付力により、座金９０’，スリーブ９２’，ベースプレート１２’が互いに強い力で当たるため、これら部材は支持部１０’と実質的に一体化される。
【０００５】
上記構成において、レールが温度変化により伸縮したり、軌道桁１’に活荷重たわみが生じた場合に、レールが図中Ｘ方向（レール長手方向）に変位し（軌道桁１’に対して相対的に変位し）、枕木２’もこのレールに追随して変位するが、この変位をゴム板７１’、８１’の弾性変形で吸収する。そのため、レールや枕木２’に過大な負荷がかかるのを回避でき、レールと枕木２’の固定構造に過大な負荷がかかるのも回避できる。
【０００６】
上記レールの変位に際して付与される水平荷重は、上下のゴム板７１’，８１’ゴム筒９５’に分担されるが、下側のゴム板７１’に伝達される水平荷重は、締結ボルト９１’を介さずにベースプレート１２’に伝達されるので、締結ボルト９１’の水平荷重負担を軽減できる。また、上側のゴム板７１’に伝達される水平荷重は、スリーブ９２’にも分担されるので、この点からも締結ボルト９１’への水平荷重負担を軽減できる。
なお、枕木２にかかる鉛直方向の荷重はゴム板７１’またはゴム板８１’が圧縮変形してこれを受け持つ。
【０００７】
【発明が解決しようとする課題】
上記公報の枕木締結構造では、ゴム板７１’はその上下面が枕木２’のフランジ部２０’とベースプレート１２’に圧力をもって接触しているだけであり、ゴム板８１’もその上下面が座金９２’とフランジ部２０’とに圧力をもって接触しているだけである。そのため、ゴム板７１’，８１’が大きな荷重を受けて弾性変形した時に、その上下の部材の面に対して滑ることがあり、設定していたばね定数とならず、期待したレベルの荷重負担が得られなかった。
【０００８】
【課題を解決するための手段】
本発明は、軌道桁と、軌道桁に沿って間隔をおいて配置され軌道桁の長手方向と直交する方向に延びる枕木と、この枕木の両端部に固定されて軌道の長手方向に延びる一対のレールとを備えた磁気浮上式リニアモータカー用軌道において、上記枕木がほぼ水平をなすフランジ部を有し、このフランジ部が枕木の少なくとも左右２箇所の枕木締結構造で軌道桁に締結され、各枕木締結構造が、
（ａ）上記軌道桁に設けられ、ほぼ水平をなす上面とこの上面に開口するねじ穴を有する支持部と、
（ｂ）上記枕木のフランジ部と上記軌道桁の支持部の上面との間に介在されるとともに貫通孔を有する板形状の第１弾性ユニットと、
（ｃ）上記枕木のフランジ部の上方に配置されるとともに貫通孔を有する座金と、
（ｄ）上記枕木のフランジ部と座金との間に介在されるとともに貫通孔を有する板形状の第２弾性ユニットと、
（ｅ）上記第１弾性ユニット，枕木のフランジ部，第２弾性ユニット，座金の順に下から積層された状態で、これら部材の貫通孔を貫通して上記支持部のねじ穴にねじ込まれ、その締結力をもってこれら部材を上記軌道桁の支持部の上面に向けて締め付ける締結ボルトと、
を備え、上記第１弾性ユニットは、第１ゴム板とこの第１ゴム板の少なくとも一方の面に接着された金属板とを有し、上記第２弾性ユニットは、第２ゴム板とこの第２ゴム板の少なくとも一方の面に接着された金属板とを有することを特徴とする。
【０００９】
上記構成によれば、第１，第２のゴム板の弾性変形により、レール変位に伴う枕木の変位を吸収できるので、レールと、枕木と、レールと枕木の固定構造に過大な負荷がかかるのを回避できる。また、これらゴム板の弾性変形により枕木締結構造の締結ボルトに過大な負荷（特に水平荷重）が付与されるのを回避できる。しかも、第１，第２ゴム板のいずれも、少なくとも一方の面に金属板が接着されているので、これら第１，第２ゴム板は大きな荷重を受けても滑りを抑制されて弾性変形することが可能となり、設定していたばね定数を確保でき、ひいては期待したレベルの荷重負担が得られる。
【００１０】
好ましくは、上記第１弾性ユニットにおいて、第１ゴム板の下面に上記金属板が接着され、この金属板の貫通孔が第１ゴム板の貫通孔より小さく形成されていてその周縁部が受部として提供され、上記座金と当該金属板の受部との間には、上記締結ボルトを囲む金属スリーブが介在され、上記締結ボルトの締結力により、上記スリーブが当該金属板の受部を軌道桁の支持部の上面に押し付けている。この構成によれば、第１弾性ユニットの金属板が締付ボルトの締め付け力でスリーブに押えられているので、第１ゴム板は特に水平荷重付与時においてより一層確実に弾性変形し、荷重を負担することができる。
【００１１】
好ましくは、上記第２弾性ユニットにおいて、第２ゴム板の下面に金属板が接着され、上記座金の周縁には下方に突出する環状の係止凸部が形成され、この係止凸部が上記第２ゴム板の外周の上縁部を係止する。
この構成によれば、座金の係止凸部の第２ゴム板への係止作用により、第２ゴム板の座金に対する滑りを抑制でき、第２ゴム板は特に水平荷重付与時においてより一層確実に弾性変形し、荷重を負担することができる。また上記係止作用により、第２弾性ユニットと座金との間の位置決めを行うことができる。
【００１２】
好ましくは、上記第１弾性ユニットにおいて、第１ゴム板の上面に金属板が接着され、その貫通孔の周縁に上方に突出する環状の係止凸部が形成され、上記第２弾性ユニットにおいて上記第２ゴム板の下面に金属板が接着され、その貫通孔の周縁に下方に突出する環状の係止凸部が形成され、これら第１，第２弾性ユニットの金属板の係止凸部が上記枕木のフランジ部の貫通孔の内周に係止されている。
【００１３】
この構成によれば、第１，第２弾性ユニットの金属板の係止凸部がフランジ部に係止作用により、金属板のフランジ部に対する滑りを確実に無くすことができ、そのため上記第１，第２ゴム板は特に水平荷重に対してより一層確実に弾性変形され、荷重を負担することができる。また、上記係止凸部の係止作用により第１，第２弾性ユニットを枕木に対して位置決めすることができる。
【００１４】
好ましくは、上記枕木が断面ほぼ四角形のパイプ形状をなし、その下側の水平辺部が上記フランジ部として提供され、この枕木の水平辺部の幅方向中央に上記貫通孔が形成されている。
この構成によれば、枕木締付構造毎に第１，第２弾性ユニット，座金，締付ボルトを１組用いるだけで済み、構成を簡略化することができる。
【００１５】
軌道桁の支持部が、軌道桁の上面から突出するモルタル製の台座と、この台座に埋め込まれた棒形状のアンカーナットと、アンカーナットの上端に固定されて台座に載せられたベースプレートとを有し、上記アンカーナットのねじ穴が、上記締結ボルトがねじ込まれる軌道桁の支持部のねじ穴として提供される。
この構成によれば、枕木や第１，第２弾性ユニットを締め付ける締付ボルトを、台座に埋め込まれたアンカーナットに直接ねじ込むので、構成を簡略化することができる。
【００１６】
【発明の実施の形態】
以下、本発明の一実施形態について、図１〜図６を参照しながら説明する。まず、磁気浮上式リニアモーターカーシステムの概略構成を図５、図６を参照しながら説明する。地上側には、車両の走行方向（紙面と直交する方向）に沿って延びる鋼製またはＰＣコンクリート製などの軌道桁１が設けられている。この軌道桁１には、その長手方向に間隔をおいて枕木２が配置されている。枕木２は軌道桁１の長手方向と直交する方向に延び、左右一対の枕木締結構造Ａを介して軌道桁１に締結される。枕木２の左右端には、軌道桁１の長手方向に延びる一対のレール３が固定されている。これら軌道桁１，枕木２，レール３により、軌道が構成される。
【００１７】
各レール３は、断面が逆Ｕ字形をなす本体部３０と、この本体部３０から水平に延びる取付部３５とを有し、この取付部３５が図示しないボルトとナットにより枕木２にしっかりと固定されている。本体部３０は枕木２から突出しており、その上面には、リニアモータの二次側導体を構成するアルミ製のリアクションプレート４が取り付けられている。
【００１８】
他方、車両５の底面には、左右に対をなすモジュール６が空気ばね５ａを介して取り付けられている。左右のモジュール６は、左右のレール３を跨ぐようにして配置され、車両５の長手方向に沿って複数組設けられている。
【００１９】
各モジュール６はモジュール本体６０を有している。モジュール本体６０は、レール３の外側に位置する垂直部６０ａとレール３の上方に位置する水平部６０ｂとを有して断面Ｌ字形をなす。モジュール本体６０の垂直部６０ａには、レール３の長手方向に沿って配置された複数の浮上用電磁石６１が設けられている。この電磁石６１は、断面Ｕ字形のコア６１ａとコイル６１ｂとを有しており、このコア６１ａの両端が上記レール３の本体部３０の一対の凸部３１，３２と対峙している。コイル６１ｂに電流が流れると、コア６１ａとレール３との間で吸引力が働き、これにより車両５が浮上するようになっている。
【００２０】
上記モジュール本体６０の水平部６０ｂの下面にはリニアモータの一次側コイル６５が設けられている。この一次側コイル６５は、上記リアクションプレート４に対峙しており、その駆動時にリアクションプレート４と協働して、車両５をレール３に沿って走行させるようになっている。
【００２１】
次に、本発明の特徴部について図１〜図４を参照しながら説明する。枕木２は、図２に示すように断面ほぼ四角形のパイプ鋼からなる。この枕木２の下側の水平辺部が締結のためのフランジ部２０として提供される。なおフランジ部２０には、左右の枕木締結構造Ａに対応して２箇所に円形の貫通孔２１（１箇所のみ示す）が形成されている。この貫通孔２１は、フランジ部２０の幅方向の中央に形成されている。また、枕木２の一方の垂直辺部には貫通孔２１に対応して作業用及び検査用の開口２２が形成されている。
【００２２】
各枕木締結構造Ａは、軌道桁１側の構成である支持部１０を有している。この支持部１０は、図１，図２に示すように、モルタル製の台座１１と、この台座１１に載せられたベースプレート１２と、短尺の異形鉄筋からなりその上端がベースプレート１２の下面中央に溶接されるとともに台座１１に埋め込まれたアンカーナット１３とを有している。アンカーナット１３にはねじ穴１４が形成されている。なお、ベースプレート１２の貫通孔を小さくしアンカーナット１３に繋がるねじ穴１４を形成することもできる。
【００２３】
上記支持部１０は次のようにして構築される。予め軌道桁１の上面に穴１ａが形成されており、この穴１ａの周囲に型枠（図示しない）が載せられている。アンカーナット１３を溶接したベースプレート１２を、穴１ａの上方に配置し、ベースプレート１２に螺合された高さ調整ボルト１５の下端を軌道桁１の上面に当て、このボルト１５を回してベースプレート１２の高さを調節した後、モルタルを型枠内および穴１ａに打設して、台座１１を構築する。この台座１１は、軌道桁１の上面から突出する水平部１１ａと、軌道桁１の穴１ａ内に位置する垂直部１１ｂとを有している。水平部１１ａの平面形状は、枕木２の長手方向に若干長い長方形をなしている。
【００２４】
上記支持部１０に枕木２のフランジ部２０を締結するための構成要素は、板形状をなす第１，第２の弾性ユニット７０，８０と、座金９０と、締結ボルト９１と、スリーブ９２と、高さ調整シム９３とを有している。
【００２５】
上記構成要素を、図３，図４を参照しながら説明する。上記弾性ユニット７０は、ゴム板７１（第１ゴム板）と、その上面全域に接着された金属板７２と、その下面全域に接着された金属板７３とを有している。ゴム板７１は平面形状が長方形をなし、枕木２の長手方向に長くなっている。金属板７２，７３は例えばステンレス製であり、ゴム板７１とほぼ等しい平面形状を有し、その内縁はゴム板７１の内縁よりも小さいものの、その外縁はゴム板７１の外縁と一致している。弾性ユニット７０において、枕木２の幅方向の寸法はフランジ部２０の幅寸法とほぼ等しく、枕木２の長手方向の寸法はフランジ部２０の幅寸法より大きい。
【００２６】
上記ゴム板７１の中央にはフランジ部２０の貫通孔２１と同径をなす円形の貫通孔７１ａが形成されている。上側の金属板７２の中央に形成された円形の貫通孔７２ａの径はゴム板７１の貫通孔７１ａより若干小さく、この貫通孔７２ａの周縁には上方に突出する円環状の係止凸部７２ｘが形成されている。また、下側の金属板７３の中央に形成された円形の貫通孔７３ａは、ゴム板７１の貫通孔７１ａより遥かに小さくなっており、この貫通孔７３aの周縁部が後述の作用をなす受部７３ｂとなっている。
【００２７】
上記弾性ユニット７０は高さ調整シム９３を介してベースプレート１２の上面（支持部１０の上面）に載り、この弾性ユニット７０の上に枕木２のフランジ部２０が載っている。弾性ユニット７０の金属板７２はフランジ部２０の下面に接し、その係止凸部７２ｘがフランジ部２０の貫通孔２１の内周に係止されることにより、弾性ユニット７０が枕木２に対して位置決めされている。
【００２８】
上記弾性ユニット８０は、上記ゴム板７１と同一材料でほぼ等しい厚さをなすゴム板８１と、このゴム板８１の下面全域に接着されたステンレス等からなる金属板８２とを有している。尚、それぞれが必要とするゴム定数さえ満たせば、ゴム板８１とゴム板７１は材質も厚みも別々でもかまわない。ゴム板８１と金属板８２は、平面形状がフランジ部２０の幅寸法とほぼ等しい径の円形をなしており、その外周縁が一致している。ゴム板８１の中央には、上記ゴム板７１の貫通孔７１ａと等しい径をなす円形の貫通孔８１ａが形成されており、金属板８２の中央にも、上記金属板７２の貫通孔７２ａと等しく貫通孔８１ａより若干小さい円形の貫通孔８２ａが形成されている。金属板８２の貫通孔８２ａの周縁には下方に突出する円環状の係止凸部８２ｘが形成されている。
【００２９】
上記弾性ユニット８０は、枕木２のフランジ部２０に載せられている。この弾性ユニット８０の金属板８２はフランジ部２０の上面に接しており、その係止凸部８２ｘがフランジ部２０の貫通孔２１の内周に係止されることにより、弾性ユニット８０が枕木２に対して位置決めされている。
【００３０】
なお本実施形態では、ゴム板７１と金属板７２，７３の接着，ゴム板８１と金属板８２の接着は加硫接着で行なっているが、接着剤による接着でもよい。
【００３１】
上記座金９０は、平面形状が円形をなし、その中央には円形の貫通孔９０ａが形成されるとともに、その下面には貫通孔９０ａを囲むようにして円形の凹部９０ｂが形成されている。さらに座金９０の外周には下方に突出する円環状の係止凸部９０ｘが形成されている。
【００３２】
上記座金９０は上記弾性ユニット８０のゴム板８１の上面に載せられており、その係止凸部９０ｘがゴム板８１の外周の上縁部に係止されることにより、座金９０が弾性ユニット８０に対して位置決めされ、ひいては枕木２に対して位置決めされている。
【００３３】
上記スリーブ９２は、枕木２のフランジ部２０の貫通孔２１，弾性ユニット７０の貫通孔７１ａ，７２ａおよび弾性ユニット８０の貫通孔８１a，８２ａ内に、これら貫通孔と同軸をなして収容されており、上記弾性ユニット７０の金属板７３の受部７３ｂと座金９０との間に介在されている。スリーブ９２の上端は座金９０の凹部９０ｂに嵌っており、これによりスリーブ９２が座金９０に対して位置決めされ、ひいては枕木２に対して位置決めされている。
【００３４】
上記締付ボルト９１は、上記座金９０の貫通孔９０ａを貫通し、スリーブ９２を貫通し、弾性ユニット７０の金属板７３の貫通孔７３ａ，高さ調整シム９３の貫通孔９３ａを貫通して、アンカーナット１３またはアンカーナット１４とベースプレート１２の両方に形成されたねじ穴１４にねじ込まれている。この締付ボルト９１の締付力により、締め付けボルト９１の頭部９１ａを介して、積層状態の弾性ユニット７０，８０，フランジ部２０，座金９０がベースプレート１２に向けて押し付けられる。なお、上記スリーブ９２により、締付ボルト９１のねじ込み量が規制され、上記ゴム板７１，８１の圧縮量を所定量に設定することができる。即ち、ゴム板の圧縮量を規制して枕木の押しつけ力を所定値に設定することができる。
【００３５】
上記締付ボルト９１の締め付け状態において、スリーブ９２の下端が弾性ユニット７０の金属板７３の受部７３ｂを押し付けた状態にあり、締付ボルト９１，座金９０，スリーブ９２，金属板７３，高さ調整シム９３が、軌道桁１の支持部１０と実質的に一体をなし、軌道桁１側の系を構成する。
【００３６】
他方、枕木２のフランジ部２０には弾性ユニット７０，８０の金属板７２，８２が接し、フランジ部２０の貫通孔２１の内周に金属板７２，８２の環状の係止凸部７２ｘ，８２ｘが係止されているため、これら金属板７２，８２は枕木２と実質的に一体をなし枕木２側の系を構成する。
【００３７】
次に、上記構成をなす枕木締結構造Ａの作用を説明する。以下、詳述する。レール３が温度変化により伸縮したり、軌道桁１に活荷重たわみが生じたりすることによって、このレール３は軌道桁１に対して図２のＸ方向（枕木２と直交する方向）に変位しようとする。また、暴風時に車両が横風を受けた時には、レール３は、図１のＹ方向（枕木２の長手方向）に変位しようとする。このような場合、レール１をしっかりと固定している枕木２は、レール３が変位しようとする方向の力を受ける。この際、軌道桁１側の系と枕木２側の系との間に介在されているゴム板７１，８１が弾性変形することにより、枕木２の変位を許容し、ひいてはレール２の変位を許容する。その結果、レール３，枕木２，レール３を枕木２に固定する構造への過大な負荷を低減できる。
【００３８】
枕木２に付与される水平荷重は、２つの経路に分かれて軌道桁１の支持部１０に伝達される。第１の経路は、フランジ部２０から金属板７２，ゴム板７１，金属板７３を経て軌道桁１の支持部１０に至る経路である。第２の経路は、フランジ部２０から金属板８２，ゴム板８１，座金９０を経、さらに締付ボルト９１，スリーブ９２を経て軌道桁１の支持部１０に至る経路である。この第２経路では締付ボルト９１を囲むスリーブ９２が締結ボルト９１より剛性が高く、座金９０との接触面積が大きいため、水平荷重を負担することができ、締付ボルト９１の荷重負担を大幅に軽減することができる。また、ゴム板７１はゴム板８１に比べてばね定数が大きいため、荷重負担比率を大きくすることができ（第１経路の荷重分担率を第２経路より大きくすることができ）、締結ボルト９１，スリーブ９２への荷重負担を軽減することができる。
【００３９】
下側のゴム板７１が車両荷重を担う。また、枕木締付構造Ａに上記水平荷重がかかる場合、鉛直荷重が伴うことが多いが、この鉛直荷重はゴム板７１の圧縮またはゴム板８１の圧縮により負担することができる。
【００４０】
第１ゴム板７１は、その上下面の全域に金属板７２，７３が接着されているので、弾性変形による滑りを回避でき、設定されたばね定数で弾性変形して、上記荷重を確実に担うことができる。しかも、金属板７２が係止凸部７２ｘにより枕木２のフランジ部２０に係止されていて枕木２と一体をなし、金属板７３がスリーブ９２によりベースプレート１２に強く押し付けられていて支持部１０と一体をなしているため、上記第１ゴム板７１の弾性変形による荷重負担をより一層確実なものとすることができる。
【００４１】
また、第２ゴム板８１は、下面の全域に金属板８２が接着されているとともに、外周の上縁部が座金９０の係止凸部９０ｘで係止されているので、弾性変形による滑りを回避でき、設定されたばね定数で弾性変形して、上記荷重を確実に担うことができる。しかも、金属板８２が係止凸部８２ｘにより枕木２のフランジ部２０に係止されていて枕木２と一体をなし、ゴム板８１の外周上縁部が座金９０の係止凸部９０ｘに係止されていて、座金９０と実質的に一体をなしているため、上記第２ゴム板８１の弾性変形による荷重負担をより一層確実なものとすることができる。
【００４２】
本実施形態では、枕木２がＨ型鋼ではなく四角形のパイプ鋼からなり、各枕木締結構造Ａにおいて、枕木２のフランジ部２０の中央に第１弾性ユニット７０，第２弾性ユニット８０，座金９０，締付ボルト９１，スリーブ９２を１組用いるだけで済み、構成を簡略化することができる。
【００４３】
本発明は上記実施形態に制約されず、種々の形態を採用可能である。例えば、第２ゴム板の上面にも金属板を接着し、この金属板の外周縁と座金の外周縁とをいずれかに設けた係止凸部で係止するようにしてもよい。
本願明細書において、ゴム板とは、ゴム状弾性を示す材料で形成された板を意味する。
【００４４】
【発明の効果】
以上説明したように本発明によれば、第１，第２のゴム板の弾性変形により、レールと、枕木と、レールと枕木の固定構造に過大な負荷がかかるのを回避できるとともに、枕木締結構造の締結ボルトに過大な負荷が付与されるのを回避できる。しかも、第１，第２ゴム板に接着した金属板により、弾性変形に伴う滑りを抑制でき、第１，第２ゴムによる荷重負担を確実に行うことができる。
【図面の簡単な説明】
【図１】本発明の一実施形態をなす枕木締結構造を、枕木の長手方向に沿う面で断面にして示す図である。
【図２】同枕木締結構造を、レールの長手方向に沿う面で断面にして示す図である。
【図３】図１の要部を拡大して示す断面図である。
【図４】同枕木締結構造に用いられる２つの弾性ユニットを示す断面図である。
【図５】同枕木締結構造が適用されるリニアモーターカーシステムの概略構成を示す正面図である。
【図６】図５の要部拡大正面図である。
【図７】従来の枕木締結構造を、レールの長手方向に沿う面で断面にして示す図である。
【符号の説明】
Ａ枕木締結構造
１軌道桁
２枕木
３レール
２０フランジ部
２１貫通孔
７０第１弾性ユニット
７１第１ゴム板
７２，７３金属板
８０第２弾性ユニット
８１第２ゴム板
８２金属板
７１ａ，７２ａ，７３ａ，８１ａ，８２ａ貫通孔
７２ｘ，８２ｘ係止凸部
９０座金
９０ｘ係止凸部
９１締付ボルト
９２スリーブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a track of a magnetically levitated linear motor car system, and more particularly to an improvement of a sleeper fastening structure.
[0002]
[Prior art]
When the rail is arranged so as to jump out from the sleeper as in the magnetically levitated linear motor car system, it is necessary to firmly fix the rail to the sleeper for safety. In this case, the rail, the sleeper, the fixing structure for fixing the rail to the sleeper, and the sleeper are fastened to the track girder due to the rail displacement due to the expansion and contraction of the rail accompanying the temperature change and the deflection of the live load of the track girder. An excessive load acts on the fastening structure. Therefore, in the sleeper fastening structure shown in Japanese Patent Laid-Open No. 9-268506, the rail displacement is absorbed between the sleepers and the track girders.
[0003]
The sleeper fastening structure of the above publication will be described with reference to FIG. The sleeper 2 'is made of H-shaped steel and is fastened to the track girder 1' by a pair of left and right sleeper fastening structures A '(only one is shown). Each sleeper fastening structure A ′ has a support portion 10 ′ provided on the track girder 1 ′. The support 10 ′ is vertically embedded in a mortar base 11 ′ provided so as to protrude from the upper surface of the track girder 1 ′, a base plate 12 ′ installed on the base 11 ′, and the base 11 ′. And an anchor nut 13 ′ having a bar shape. The base plate 12 ′ is fixed to the base 11 ′ by fixing bolts 15 ′ screwed into the anchor nut 13 ′.
[0004]
The lower flange portion 20 'of the sleeper 2' is placed on the base plate 12 'via a rubber plate 71'. Further, a rubber plate 81 ′ and a washer 90 ′ are placed on both sides in the width direction of the lower flange portion 20 ′. A rubber cylinder 95 ′ is accommodated in the through holes formed in both side portions of the lower flange portion 20 ′, and a sleeve 92 ′ is accommodated therein. Then, the sleeper 2 'is fastened by the fastening bolt 91' passing through the washer 90 'and the sleeve 92' and screwed into the base plate 12 '. At this time, the tightening bolt 91 ′ is screwed in with a tightening force, and by this tightening force, the rubber plate 71 ′, the lower flange portion 20 ′, the rubber plate 81 ′, and the washer 90 ′ in the laminated state are converted into the base plate 12 ′. It is pushed toward. In this state, the rubber plates 71 ′ and 81 ′ are compressed, but the amount of compression is regulated by the sleeve 92 ′. Further, since the washer 90 ', the sleeve 92', and the base plate 12 'contact each other with a strong force by the tightening force of the tightening bolt 91', these members are substantially integrated with the support portion 10 '.
[0005]
In the above configuration, when the rail expands or contracts due to a temperature change or the deflection of a live load occurs in the track girder 1 ′, the rail is displaced in the X direction (rail longitudinal direction) in the figure (relative to the track girder 1 ′). The sleepers 2 'are also displaced following the rails, and this displacement is absorbed by the elastic deformation of the rubber plates 71' and 81 '. Therefore, it is possible to avoid applying an excessive load to the rail and the sleeper 2 ′, and it is also possible to avoid applying an excessive load to the fixing structure of the rail and the sleeper 2 ′.
[0006]
The horizontal load applied when the rail is displaced is shared by the upper and lower rubber plates 71 ′ and 81 ′ rubber cylinders 95 ′. The horizontal load transmitted to the lower rubber plate 71 ′ is the fastening bolt 91 ′. Therefore, the horizontal load burden of the fastening bolt 91 'can be reduced. Further, since the horizontal load transmitted to the upper rubber plate 71 ′ is also shared by the sleeve 92 ′, the horizontal load burden on the fastening bolt 91 ′ can be reduced also from this point.
The load in the vertical direction applied to the sleeper 2 is handled by the rubber plate 71 ′ or the rubber plate 81 ′ being compressed and deformed.
[0007]
[Problems to be solved by the invention]
In the sleeper fastening structure of the above publication, the upper and lower surfaces of the rubber plate 71 'are only in contact with the flange portion 20' and the base plate 12 'of the sleeper 2' with pressure, and the upper and lower surfaces of the rubber plate 81 'are also washers. It is only in contact with 92 'and flange part 20' with pressure. Therefore, when the rubber plates 71 ′ and 81 ′ are elastically deformed by receiving a large load, they may slide with respect to the surfaces of the upper and lower members, so that the set spring constant does not become the expected load load. It was not obtained.
[0008]
[Means for Solving the Problems]
The present invention relates to a track girder, a sleeper that is spaced along the track girder and extends in a direction perpendicular to the longitudinal direction of the track girder, and a pair of rails fixed to both ends of the sleeper and extending in the longitudinal direction of the track. In a magnetically levitated linear motor car track provided with rails, the sleepers have flange portions that are substantially horizontal, and the flange portions are fastened to the track girders with a sleeper fastening structure of at least two left and right sleepers. The fastening structure is
(A) a support portion provided on the track girder and having a substantially horizontal upper surface and a screw hole opening on the upper surface;
(B) a plate-shaped first elastic unit interposed between the flange portion of the sleeper and the upper surface of the support portion of the track girder and having a through hole;
(C) a washer disposed above the flange portion of the sleeper and having a through hole;
(D) a plate-shaped second elastic unit interposed between the flange portion of the sleeper and the washer and having a through hole;
(E) In a state where the first elastic unit, the flange portion of the sleeper, the second elastic unit, and the washer are stacked from the bottom in order, the through holes of these members are passed through and screwed into the screw holes of the support portion. Fastening bolts that fasten these members toward the upper surface of the support portion of the track girder with a fastening force;
The first elastic unit includes a first rubber plate and a metal plate bonded to at least one surface of the first rubber plate, and the second elastic unit includes the second rubber plate and the first rubber plate. And a metal plate bonded to at least one surface of the two rubber plates.
[0009]
According to the above configuration, since the displacement of the sleepers accompanying the rail displacement can be absorbed by the elastic deformation of the first and second rubber plates, an excessive load is applied to the rail, the sleepers, and the fixing structure of the rails and the sleepers. Can be avoided. Further, it is possible to avoid applying an excessive load (particularly a horizontal load) to the fastening bolt of the sleeper fastening structure due to the elastic deformation of these rubber plates. Moreover, since the metal plate is bonded to at least one surface of each of the first and second rubber plates, the first and second rubber plates are elastically deformed while being prevented from slipping even when subjected to a large load. Therefore, the set spring constant can be secured, and the expected load level can be obtained.
[0010]
Preferably, in the first elastic unit, the metal plate is bonded to the lower surface of the first rubber plate, a through hole of the metal plate is formed smaller than a through hole of the first rubber plate, and a peripheral portion thereof is a receiving portion. A metal sleeve surrounding the fastening bolt is interposed between the washer and the receiving portion of the metal plate, and by the fastening force of the fastening bolt, the sleeve moves the receiving portion of the metal plate into a track girder. It is pressed against the upper surface of the support part. According to this configuration, since the metal plate of the first elastic unit is pressed against the sleeve by the tightening force of the tightening bolt, the first rubber plate is more reliably elastically deformed particularly when a horizontal load is applied, and the load is reduced. Can bear.
[0011]
Preferably, in the second elastic unit, a metal plate is bonded to the lower surface of the second rubber plate, and an annular locking projection that protrudes downward is formed on the periphery of the washer. The upper edge of the outer periphery of the second rubber plate is locked.
According to this configuration, the locking action of the locking projection of the washer to the second rubber plate can suppress the slip of the second rubber plate with respect to the washer, and the second rubber plate is more reliable particularly when a horizontal load is applied. It can be elastically deformed to bear the load. Moreover, the positioning between the second elastic unit and the washer can be performed by the locking action.
[0012]
Preferably, in the first elastic unit, the metal plate is bonded to the upper surface of the first rubber plate, the locking protrusions of the annular projecting upward the periphery of the through hole is formed, the in the second elastic unit A metal plate is bonded to the lower surface of the second rubber plate, and annular locking projections projecting downward are formed on the periphery of the through hole. The locking projections of the metal plates of the first and second elastic units are It is locked to the inner periphery of the through hole of the flange portion of the sleeper.
[0013]
According to this configuration, the locking projections of the metal plates of the first and second elastic units can be reliably prevented from slipping with respect to the flange portions of the metal plates by the locking action of the flange portions. In particular, the second rubber plate is elastically deformed more reliably with respect to the horizontal load, and can bear the load. Further, the first and second elastic units can be positioned with respect to the sleepers by the locking action of the locking projections.
[0014]
Preferably, the sleeper has a pipe shape with a substantially rectangular cross section, the lower horizontal side portion is provided as the flange portion, and the through hole is formed in the center of the horizontal side portion of the sleeper in the width direction.
According to this configuration, it is only necessary to use one set of the first and second elastic units, the washer, and the tightening bolt for each sleeper tightening structure, and the configuration can be simplified.
[0015]
The support part of the track girder has a mortar base that protrudes from the top surface of the track girder, a bar-shaped anchor nut embedded in the base, and a base plate that is fixed to the upper end of the anchor nut and placed on the base. And the screw hole of the said anchor nut is provided as a screw hole of the support part of the track beam into which the said fastening bolt is screwed.
According to this configuration, the tightening bolt for tightening the sleepers and the first and second elastic units is directly screwed into the anchor nut embedded in the pedestal, so that the configuration can be simplified.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. First, a schematic configuration of a magnetically levitated linear motor car system will be described with reference to FIGS. On the ground side, a track girder 1 made of steel or PC concrete extending along the traveling direction of the vehicle (direction orthogonal to the paper surface) is provided. In this orbit girder 1, sleepers 2 are arranged at intervals in the longitudinal direction. The sleeper 2 extends in a direction perpendicular to the longitudinal direction of the track girder 1 and is fastened to the track girder 1 via a pair of left and right sleeper fastening structures A. A pair of rails 3 extending in the longitudinal direction of the track girder 1 are fixed to the left and right ends of the sleepers 2. These track girders 1, sleepers 2 and rails 3 constitute a track.
[0017]
Each rail 3 has a main body portion 30 having an inverted U-shaped cross section and a mounting portion 35 extending horizontally from the main body portion 30, and the mounting portion 35 is firmly fixed to the sleeper 2 with bolts and nuts (not shown). Has been. The main body 30 protrudes from the sleeper 2, and an aluminum reaction plate 4 that constitutes a secondary side conductor of the linear motor is attached to the upper surface of the main body 30.
[0018]
On the other hand, the module 6 which makes a pair on the left and right is attached to the bottom surface of the vehicle 5 via an air spring 5a. The left and right modules 6 are arranged so as to straddle the left and right rails 3, and a plurality of sets are provided along the longitudinal direction of the vehicle 5.
[0019]
Each module 6 has a module body 60. The module main body 60 has a vertical portion 60 a located outside the rail 3 and a horizontal portion 60 b located above the rail 3 and has an L-shaped cross section. A plurality of levitating electromagnets 61 arranged along the longitudinal direction of the rail 3 are provided in the vertical portion 60 a of the module body 60. The electromagnet 61 has a core 61 a having a U-shaped cross section and a coil 61 b, and both ends of the core 61 a are opposed to the pair of convex portions 31 and 32 of the main body 30 of the rail 3. When a current flows through the coil 61b, an attractive force acts between the core 61a and the rail 3, thereby causing the vehicle 5 to float.
[0020]
A linear motor primary coil 65 is provided on the lower surface of the horizontal portion 60 b of the module body 60. The primary side coil 65 faces the reaction plate 4, and cooperates with the reaction plate 4 to drive the vehicle 5 along the rail 3 when driven.
[0021]
Next, the features of the present invention will be described with reference to FIGS. The sleeper 2 is made of pipe steel having a substantially square cross section as shown in FIG. A lower horizontal side portion of the sleeper 2 is provided as a flange portion 20 for fastening. In addition, the circular through-hole 21 (only one place is shown) is formed in the flange part 20 at two places corresponding to the left and right sleeper fastening structures A. The through hole 21 is formed in the center of the flange portion 20 in the width direction. In addition, an opening 22 for work and inspection is formed in one vertical side portion of the sleeper 2 corresponding to the through hole 21.
[0022]
Each sleeper fastening structure A has the support part 10 which is the structure at the side of the track girder 1 side. As shown in FIGS. 1 and 2, the support portion 10 is composed of a mortar base 11, a base plate 12 mounted on the base 11, and a short deformed reinforcing bar whose upper end is welded to the center of the lower surface of the base plate 12. And an anchor nut 13 embedded in the pedestal 11. A screw hole 14 is formed in the anchor nut 13. In addition, the through-hole of the base plate 12 can be made small and the screw hole 14 connected with the anchor nut 13 can also be formed.
[0023]
The support 10 is constructed as follows. A hole 1a is formed in advance on the upper surface of the track girder 1, and a mold (not shown) is placed around the hole 1a. The base plate 12 to which the anchor nut 13 is welded is disposed above the hole 1a, the lower end of the height adjustment bolt 15 screwed into the base plate 12 is applied to the upper surface of the track girder 1, and the bolt 15 is turned to turn the base plate 12 After adjusting the height, the mortar is driven into the mold and in the hole 1a to construct the base 11. The pedestal 11 has a horizontal portion 11 a protruding from the upper surface of the track girder 1 and a vertical portion 11 b positioned in the hole 1 a of the track girder 1. The planar shape of the horizontal portion 11 a is a rectangle that is slightly longer in the longitudinal direction of the sleepers 2.
[0024]
The components for fastening the flange part 20 of the sleeper 2 to the support part 10 are plate-like first and second elastic units 70, 80, washers 90, fastening bolts 91, sleeves 92, And a height adjustment shim 93.
[0025]
The above components will be described with reference to FIGS. The elastic unit 70 includes a rubber plate 71 (first rubber plate), a metal plate 72 bonded to the entire upper surface thereof, and a metal plate 73 bonded to the entire lower surface thereof. The rubber plate 71 has a rectangular planar shape and is elongated in the longitudinal direction of the sleepers 2. The metal plates 72 and 73 are made of, for example, stainless steel, and have a planar shape substantially equal to that of the rubber plate 71. Although the inner edge is smaller than the inner edge of the rubber plate 71, the outer edge coincides with the outer edge of the rubber plate 71. . In the elastic unit 70, the dimension in the width direction of the sleeper 2 is substantially equal to the width dimension of the flange part 20, and the dimension in the longitudinal direction of the sleeper 2 is larger than the width dimension of the flange part 20.
[0026]
A circular through hole 71 a having the same diameter as the through hole 21 of the flange portion 20 is formed at the center of the rubber plate 71. The diameter of the circular through-hole 72a formed at the center of the upper metal plate 72 is slightly smaller than the through-hole 71a of the rubber plate 71, and an annular locking projection 72x protruding upward at the periphery of the through-hole 72a. Is formed. In addition, a circular through hole 73a formed in the center of the lower metal plate 73 is much smaller than the through hole 71a of the rubber plate 71, and a peripheral portion of the through hole 73a receives an action described later. Part 73b is formed.
[0027]
The elastic unit 70 is placed on the upper surface of the base plate 12 (the upper surface of the support portion 10) via the height adjustment shim 93, and the flange portion 20 of the sleeper 2 is placed on the elastic unit 70. The metal plate 72 of the elastic unit 70 is in contact with the lower surface of the flange portion 20, and the locking projection 72 x is locked to the inner periphery of the through hole 21 of the flange portion 20, so that the elastic unit 70 is attached to the sleeper 2. It is positioned.
[0028]
The elastic unit 80 includes a rubber plate 81 made of the same material as the rubber plate 71 and having substantially the same thickness, and a metal plate 82 made of stainless steel or the like bonded to the entire lower surface of the rubber plate 81. It should be noted that the rubber plate 81 and the rubber plate 71 may be made of different materials and thicknesses as long as they satisfy the required rubber constants. The rubber plate 81 and the metal plate 82 have a circular shape with a planar shape having a diameter substantially equal to the width dimension of the flange portion 20, and the outer peripheral edges thereof coincide. A circular through hole 81 a having the same diameter as the through hole 71 a of the rubber plate 71 is formed in the center of the rubber plate 81, and is equal to the through hole 72 a of the metal plate 72 in the center of the metal plate 82. A circular through hole 82a that is slightly smaller than the through hole 81a is formed. An annular locking projection 82x protruding downward is formed on the periphery of the through hole 82a of the metal plate 82.
[0029]
The elastic unit 80 is placed on the flange portion 20 of the sleeper 2. The metal plate 82 of the elastic unit 80 is in contact with the upper surface of the flange portion 20, and the locking projection 82 x is locked to the inner periphery of the through hole 21 of the flange portion 20, so that the elastic unit 80 is moved to the sleeper 2. Is positioned against.
[0030]
In this embodiment, the rubber plate 71 and the metal plates 72 and 73 and the rubber plate 81 and the metal plate 82 are bonded by vulcanization bonding, but may be bonded by an adhesive.
[0031]
The washer 90 has a circular planar shape, a circular through hole 90a is formed at the center thereof, and a circular recess 90b is formed on the lower surface of the washer 90 so as to surround the through hole 90a. Further, an annular locking projection 90x protruding downward is formed on the outer periphery of the washer 90.
[0032]
The washer 90 is placed on the upper surface of the rubber plate 81 of the elastic unit 80, and the locking projection 90x is locked to the upper edge of the outer periphery of the rubber plate 81, so that the washer 90 is elastic. To the sleeper 2 as a result.
[0033]
The sleeve 92 is accommodated in the through hole 21 of the flange portion 20 of the sleeper 2, the through holes 71 a and 72 a of the elastic unit 70, and the through holes 81 a and 82 a of the elastic unit 80 so as to be coaxial with these through holes. The elastic unit 70 is interposed between the receiving portion 73b of the metal plate 73 and the washer 90. The upper end of the sleeve 92 is fitted in the recess 90 b of the washer 90, whereby the sleeve 92 is positioned with respect to the washer 90, and consequently with respect to the sleeper 2.
[0034]
The fastening bolt 91 passes through the through hole 90a of the washer 90, passes through the sleeve 92, passes through the through hole 73a of the metal plate 73 of the elastic unit 70, and the through hole 93a of the height adjusting shim 93, It is screwed into the screw hole 14 formed in both the anchor nut 13 or the anchor nut 14 and the base plate 12. With the tightening force of the tightening bolt 91, the elastic units 70 and 80, the flange portion 20, and the washer 90 in a stacked state are pressed toward the base plate 12 through the head 91 a of the tightening bolt 91. Note that the amount of screwing of the tightening bolt 91 is restricted by the sleeve 92, and the amount of compression of the rubber plates 71 and 81 can be set to a predetermined amount. That is, the pressing force of the sleeper can be set to a predetermined value by regulating the compression amount of the rubber plate.
[0035]
In the tightened state of the tightening bolt 91, the lower end of the sleeve 92 is in a state of pressing the receiving portion 73b of the metal plate 73 of the elastic unit 70. The tightening bolt 91, the washer 90, the sleeve 92, the metal plate 73, the height The adjustment shim 93 is substantially integrated with the support portion 10 of the track girder 1 and constitutes a system on the side of the track girder 1.
[0036]
On the other hand, the metal plates 72 and 82 of the elastic units 70 and 80 are in contact with the flange portion 20 of the sleeper 2, and the annular locking projections 72 x and 82 x of the metal plates 72 and 82 are formed on the inner periphery of the through hole 21 of the flange portion 20. Therefore, the metal plates 72 and 82 are substantially integrated with the sleeper 2 and constitute a sleeper 2 side system.
[0037]
Next, the operation of the sleeper fastening structure A having the above configuration will be described. Details will be described below. When the rail 3 expands and contracts due to a temperature change or the live load deflection occurs in the track girder 1, the rail 3 will be displaced in the X direction in FIG. 2 (direction orthogonal to the sleepers 2) with respect to the track girder 1. And When the vehicle receives a crosswind during a storm, the rail 3 tends to be displaced in the Y direction (the longitudinal direction of the sleepers 2) in FIG. In such a case, the sleepers 2 that firmly fix the rail 1 receive a force in the direction in which the rail 3 tends to be displaced. At this time, the rubber plates 71 and 81 interposed between the system on the side of the track girder 1 and the system on the sleeper 2 are elastically deformed, thereby allowing the sleeper 2 to be displaced and eventually allowing the rail 2 to be displaced. To do. As a result, an excessive load on the structure for fixing the rail 3, the sleeper 2 and the rail 3 to the sleeper 2 can be reduced.
[0038]
The horizontal load applied to the sleeper 2 is transmitted to the support portion 10 of the track girder 1 in two paths. The first path is a path from the flange portion 20 to the support portion 10 of the track girder 1 through the metal plate 72, the rubber plate 71, and the metal plate 73. The second path is a path from the flange portion 20 through the metal plate 82, the rubber plate 81, and the washer 90 to the support portion 10 of the track girder 1 through the tightening bolt 91 and the sleeve 92. In this second path, the sleeve 92 surrounding the fastening bolt 91 is higher in rigidity than the fastening bolt 91 and has a large contact area with the washer 90, so that it is possible to bear a horizontal load and greatly increase the load on the fastening bolt 91. Can be reduced. Further, since the rubber plate 71 has a larger spring constant than the rubber plate 81, the load sharing ratio can be increased (the load sharing ratio of the first path can be made larger than that of the second path), and the fastening bolt 91 can be obtained. , The load on the sleeve 92 can be reduced.
[0039]
The lower rubber plate 71 bears the vehicle load. Further, when the horizontal load is applied to the sleeper fastening structure A, a vertical load is often accompanied, but this vertical load can be borne by compression of the rubber plate 71 or compression of the rubber plate 81.
[0040]
Since the metal plates 72 and 73 are bonded to the entire upper and lower surfaces of the first rubber plate 71, slippage due to elastic deformation can be avoided, and the first rubber plate 71 is elastically deformed with a set spring constant and reliably bears the load. Can do. In addition, the metal plate 72 is locked to the flange portion 20 of the sleeper 2 by the locking projection 72x and is integrated with the sleeper 2, and the metal plate 73 is strongly pressed against the base plate 12 by the sleeve 92, Since they are integrated, the load burden due to the elastic deformation of the first rubber plate 71 can be further ensured.
[0041]
Further, the second rubber plate 81 has a metal plate 82 bonded to the entire area of the lower surface, and the upper edge of the outer periphery is locked by the locking projection 90x of the washer 90. This can be avoided, and can be elastically deformed with a set spring constant to reliably bear the load. In addition, the metal plate 82 is locked to the flange portion 20 of the sleeper 2 by the locking projection 82x so as to be integrated with the sleeper 2, and the upper peripheral edge of the rubber plate 81 is engaged with the locking projection 90x of the washer 90. Since it is stopped and substantially integrated with the washer 90, the load burden due to the elastic deformation of the second rubber plate 81 can be further ensured.
[0042]
In the present embodiment, the sleepers 2 are made of rectangular pipe steel instead of H-shaped steel, and in each sleeper fastening structure A, the first elastic unit 70, the second elastic unit 80, the washer 90, Only one set of the fastening bolt 91 and the sleeve 92 is used, and the configuration can be simplified.
[0043]
The present invention is not limited to the above embodiment, and various forms can be adopted. For example, a metal plate may be bonded to the upper surface of the second rubber plate, and the outer peripheral edge of the metal plate and the outer peripheral edge of the washer may be locked by a locking projection provided on either.
In the present specification, the rubber plate means a plate formed of a material exhibiting rubber-like elasticity.
[0044]
【The invention's effect】
As described above, according to the present invention, it is possible to avoid an excessive load on the rail, the sleeper, and the fixing structure of the rail and the sleeper due to the elastic deformation of the first and second rubber plates. It can be avoided that an excessive load is applied to the fastening bolt of the structure. In addition, the metal plate bonded to the first and second rubber plates can suppress slippage due to elastic deformation, and can reliably load the first and second rubbers.
[Brief description of the drawings]
FIG. 1 is a diagram showing a cross-section of a sleeper fastening structure according to an embodiment of the present invention along a surface along the longitudinal direction of a sleeper.
FIG. 2 is a view showing the sleeper fastening structure in a cross section along a plane along the longitudinal direction of the rail.
FIG. 3 is an enlarged cross-sectional view showing a main part of FIG. 1;
FIG. 4 is a cross-sectional view showing two elastic units used in the sleeper fastening structure.
FIG. 5 is a front view showing a schematic configuration of a linear motor car system to which the sleeper fastening structure is applied.
6 is an enlarged front view of the main part of FIG. 5. FIG.
FIG. 7 is a view showing a conventional sleeper fastening structure in a cross section along a plane along the longitudinal direction of a rail.
[Explanation of symbols]
A sleeper fastening structure 1 track girder 2 sleeper 3 rail 20 flange portion 21 through hole 70 first elastic unit 71 first rubber plate 72, 73 metal plate 80 second elastic unit 81 second rubber plate 82 metal plates 71a, 72a, 73a , 81a, 82a Through holes 72x, 82x Locking projection 90 Washer 90x Locking projection 91 Tightening bolt 92 Sleeve

Claims

A track girder, a sleeper that is spaced along the track girder and extends in a direction perpendicular to the longitudinal direction of the track girder, and a pair of rails that are fixed to both ends of the sleeper and extend in the longitudinal direction of the track In a magnetically levitated linear motor car track,
The sleeper has a flange portion that is substantially horizontal, and the flange portion is fastened to the track girder by a sleeper fastening structure of at least two left and right sleepers, and each sleeper fastening structure is
(A) a support portion provided on the track girder and having a substantially horizontal upper surface and a screw hole opening on the upper surface;
(B) a plate-shaped first elastic unit interposed between the flange portion of the sleeper and the upper surface of the support portion of the track girder and having a through hole;
(C) a washer disposed above the flange portion of the sleeper and having a through hole;
(D) a plate-shaped second elastic unit interposed between the flange portion of the sleeper and the washer and having a through hole;
(E) In a state where the first elastic unit, the flange portion of the sleeper, the second elastic unit, and the washer are stacked from the bottom in order, the through holes of these members are passed through and screwed into the screw holes of the support portion. Fastening bolts that fasten these members toward the upper surface of the support portion of the track girder with a fastening force;
The first elastic unit includes a first rubber plate and a metal plate bonded to at least one surface of the first rubber plate, and the second elastic unit includes the second rubber plate and the first rubber plate. 2 having a metal plate bonded to at least one surface of the rubber plate,
In the first elastic unit, the metal plate is bonded to the lower surface of the first rubber plate, a through hole of the metal plate is formed smaller than a through hole of the first rubber plate, and a peripheral portion thereof is provided as a receiving portion. A metal sleeve surrounding the fastening bolt is interposed between the washer and the receiving portion of the metal plate, and by the fastening force of the fastening bolt, the sleeve causes the receiving portion of the metal plate to support the track girder. A magnetically levitated linear motor car track characterized by being pressed against the upper surface of the motor.

A track girder, a sleeper that is spaced along the track girder and extends in a direction perpendicular to the longitudinal direction of the track girder, and a pair of rails that are fixed to both ends of the sleeper and extend in the longitudinal direction of the track In a magnetically levitated linear motor car track,
The sleeper has a flange portion that is substantially horizontal, and the flange portion is fastened to the track girder by a sleeper fastening structure of at least two left and right sleepers, and each sleeper fastening structure is
(A) a support portion provided on the track girder and having a substantially horizontal upper surface and a screw hole opening on the upper surface;
(B) a plate-shaped first elastic unit interposed between the flange portion of the sleeper and the upper surface of the support portion of the track girder and having a through hole;
(C) a washer disposed above the flange portion of the sleeper and having a through hole;
(D) a plate-shaped second elastic unit interposed between the flange portion of the sleeper and the washer and having a through hole;
(E) In a state where the first elastic unit, the flange portion of the sleeper, the second elastic unit, and the washer are stacked from the bottom in order, the through holes of these members are passed through and screwed into the screw holes of the support portion. Fastening bolts that fasten these members toward the upper surface of the support portion of the track girder with a fastening force;
The first elastic unit includes a first rubber plate and a metal plate bonded to at least one surface of the first rubber plate, and the second elastic unit includes the second rubber plate and the first rubber plate. 2 having a metal plate bonded to at least one surface of the rubber plate,
In the second elastic unit, a metal plate is bonded to the lower surface of the second rubber plate, and an annular locking projection protruding downward is formed on the periphery of the washer, and the locking projection is formed by the second rubber. A magnetically levitated linear motor car track characterized by locking the upper edge of the outer periphery of the plate.

A track girder, a sleeper that is spaced along the track girder and extends in a direction perpendicular to the longitudinal direction of the track girder, and a pair of rails that are fixed to both ends of the sleeper and extend in the longitudinal direction of the track In a magnetically levitated linear motor car track,
The sleeper has a flange portion that is substantially horizontal, and the flange portion is fastened to the track girder by a sleeper fastening structure of at least two left and right sleepers, and each sleeper fastening structure is
(A) a support portion provided on the track girder and having a substantially horizontal upper surface and a screw hole opening on the upper surface;
(B) a plate-shaped first elastic unit interposed between the flange portion of the sleeper and the upper surface of the support portion of the track girder and having a through hole;
(C) a washer disposed above the flange portion of the sleeper and having a through hole;
(D) a plate-shaped second elastic unit interposed between the flange portion of the sleeper and the washer and having a through hole;
(E) In a state where the first elastic unit, the flange portion of the sleeper, the second elastic unit, and the washer are stacked from the bottom in order, the through holes of these members are passed through and screwed into the screw holes of the support portion. Fastening bolts that fasten these members toward the upper surface of the support portion of the track girder with a fastening force;
The first elastic unit includes a first rubber plate and a metal plate bonded to at least one surface of the first rubber plate, and the second elastic unit includes the second rubber plate and the first rubber plate. 2 having a metal plate bonded to at least one surface of the rubber plate,
In the first elastic unit, a metal plate is bonded to the upper surface of the first rubber plate, and an annular locking convex portion protruding upward is formed at the periphery of the through hole . In the second elastic unit, the second rubber is A metal plate is bonded to the lower surface of the plate, and annular locking projections projecting downward are formed at the periphery of the through-holes. The locking projections of the metal plates of the first and second elastic units are formed by the sleepers. A magnetically levitated linear motor car track that is locked to the inner periphery of the through hole of the flange portion.

The sleeper has a substantially quadrangular pipe shape, the lower horizontal side is provided as the flange portion, and the through hole is formed in the center of the horizontal side of the sleeper in the width direction. The magnetically levitated linear motor car track according to any one of claims 1 to 3 .

The support part of the track girder has a mortar base projecting from the top surface of the track girder, a rod-shaped anchor nut embedded in the base, and a base plate fixed to the upper end of the anchor nut and placed on the base plate. and the screw hole of the anchor nut, maglev according to any one of claims 1 to 4, characterized in that provided as threaded holes in the support portion of the track girder which the fastening bolt is screwed Orbit.