JP4271004B2 - Pantograph device - Google Patents

Description

この発明は、架線から電力を取り入れる為、新幹線等、高速で運転する鉄道車両の屋根上に設置した状態で使用する、パンタグラフ装置の改良に関する。   The present invention relates to an improvement of a pantograph device that is used in a state of being installed on a roof of a railway vehicle that operates at a high speed, such as a Shinkansen, in order to take in electric power from an overhead line.

鉄道車両の屋根の上方にはパンタグラフ装置を介して集電舟を支持し、架線から電力を取り入れる様にしている。即ち、この集電舟の上面に支持した、燒結金属等の導電材製の摺り板を架線の下縁に向け弾性的に押し付け、この架線から車両に電気を取り入れる様にしている。この様なパンタグラフ装置のうち、新幹線等の高速鉄道車両に使用するものは、運転時に発生する気流騒音の低減を考慮して、在来線に使用していた菱形構造のものとは異なる、所謂シングルアーム構造のものを使用している。   A current collector boat is supported above the roof of the railway vehicle via a pantograph device so that power is taken in from the overhead line. That is, a sliding plate made of a conductive material such as sintered metal supported on the upper surface of the current collector boat is elastically pressed toward the lower edge of the overhead wire, and electricity is taken into the vehicle from this overhead wire. Among such pantograph devices, those used for high-speed railway vehicles such as Shinkansen are different from the diamond-shaped structure used for conventional lines in consideration of reduction of airflow noise generated during operation. A single arm structure is used.

この様に気流騒音の低減を考慮したシングルアーム構造のパンタグラフ装置として、特許文献１や非特許文献１に記載されたものが知られている。図１１〜１４は、これら特許文献１及び非特許文献１に記載されたパンタグラフ装置１を示している。このパンタグラフ装置１は、台枠２の上面に、第一の横軸である揺動支持軸３を、車両の幅方向に亙って設けている。そして、この揺動支持軸３の中間部に、下枠４の基端部（下端部）を固定している。従ってこの下枠４は、この揺動支持軸３を中心として起伏する。又、この下枠４の先端部（上端部）に、第二の横軸である連結軸５を、上記揺動支持軸３と平行に設けている。そして、この連結軸５により、上枠６の基端部（下端部）を上記下枠４の先端部に、揺動変位自在に結合している。更に、上記上枠６の先端部（上端部）に、集電舟装置７を支持している。そして、上記揺動支持軸３と上記台枠２との間に設けたばね８により、上記下枠４と上枠６とを、図１１に鎖線で示す畳んだ状態から同図に実線で示す状態にまで起立させる方向の弾力を付与している。   As described above, those described in Patent Literature 1 and Non-Patent Literature 1 are known as pantograph devices having a single arm structure in consideration of reduction of airflow noise. FIGS. 11 to 14 show the pantograph device 1 described in Patent Document 1 and Non-Patent Document 1. FIG. In the pantograph device 1, a swing support shaft 3 as a first horizontal axis is provided on the upper surface of the underframe 2 over the width direction of the vehicle. A base end portion (lower end portion) of the lower frame 4 is fixed to an intermediate portion of the swing support shaft 3. Accordingly, the lower frame 4 undulates around the swing support shaft 3. A connecting shaft 5, which is a second horizontal axis, is provided in parallel to the swing support shaft 3 at the tip (upper end) of the lower frame 4. The connecting shaft 5 connects the base end portion (lower end portion) of the upper frame 6 to the distal end portion of the lower frame 4 so as to be swingably displaceable. Further, a current collecting boat device 7 is supported at the tip (upper end) of the upper frame 6. Then, the spring 8 provided between the swing support shaft 3 and the underframe 2 causes the lower frame 4 and the upper frame 6 to be in a state shown by a solid line from the folded state shown by a chain line in FIG. Elasticity in the direction to stand up to is given.

鉄道車両の走行時に上記集電舟装置７は、屋根面と架線との距離の変化に対応して、上記下枠４と上記上枠６との交差角度を変化させつつ、上記屋根面に対し昇降する。この場合でも、上記集電舟装置７の姿勢を一定として、この集電舟装置７の上面に支持した摺り板９、９と上記架線の下縁との摺接状態が適正に維持される様にしている。この為に、上記下枠４の先端部と上記上枠６の基端部との連結部、並びにこの上枠６の先端部と上記集電舟装置７との連結部には、適宜のリンク機構を設けて、上記下枠４及び上枠６の起伏に拘らず、上記集電舟装置７の姿勢が変化しない様にしている。   When the railway vehicle travels, the current collecting boat device 7 changes the crossing angle between the lower frame 4 and the upper frame 6 in response to a change in the distance between the roof surface and the overhead line, and against the roof surface. Go up and down. Even in this case, the posture of the current collecting boat device 7 is fixed, and the sliding contact state between the sliding plates 9 and 9 supported on the upper surface of the current collecting boat device 7 and the lower edge of the overhead wire is properly maintained. I have to. For this purpose, an appropriate link is provided between the connecting portion between the distal end portion of the lower frame 4 and the proximal end portion of the upper frame 6 and the connecting portion between the distal end portion of the upper frame 6 and the current collector boat device 7. A mechanism is provided so that the posture of the current collecting boat device 7 does not change regardless of the undulation of the lower frame 4 and the upper frame 6.

具体的には、図１４に示す様に、上記上枠６の基端部に釣り合い腕１０の基端部を、この上枠６の基端部から下方に突出する状態で結合固定し、この釣り合い腕１０をこの上枠６と共に、上記連結軸５を中心として揺動する様にしている。又、この釣り合い腕１０の先端部に、第三の横軸である釣り合い軸１１を、上記揺動支持軸３及び連結軸５と平行に設け、この釣り合い軸１１に、釣り合い棒１２の先端部（上端部）を、揺動変位自在に支持している。又、この釣り合い棒１２の基端部（下端部）を前記台枠２の上面に、第四の横軸であって上記釣り合い軸１１と平行に設けられた下部釣り合い軸１３により、揺動変位自在に支持している。更に、上記集電舟装置７の下面に設けたリンク腕１４の先端部と、上記下枠４の先端部に固定された部分とに、ロッド１５の両端部を揺動変位自在に連結している。   Specifically, as shown in FIG. 14, the base end portion of the counter arm 10 is coupled and fixed to the base end portion of the upper frame 6 so as to protrude downward from the base end portion of the upper frame 6. The counter arm 10 is swung around the connecting shaft 5 together with the upper frame 6. Further, a balance shaft 11 as a third horizontal axis is provided at the tip of the balance arm 10 in parallel with the swing support shaft 3 and the connecting shaft 5, and the tip of the balance rod 12 is provided on the balance shaft 11. The (upper end) is supported so as to be swingable and displaceable. Further, the base end portion (lower end portion) of the balance rod 12 is oscillated and displaced by the lower balance shaft 13 which is provided on the upper surface of the underframe 2 as the fourth horizontal axis and parallel to the balance shaft 11. Supports freely. Further, both end portions of the rod 15 are connected to a tip end portion of the link arm 14 provided on the lower surface of the current collecting boat device 7 and a portion fixed to the tip end portion of the lower frame 4 in a swingable manner. Yes.

上述の様な構成により、上記下枠４及び上枠６の起伏に拘らず、上記集電舟装置７の姿勢が変化しない様にしている。尚、これら下枠４及び上枠６は、何れも中空管状としており、上記釣り合い棒１２はこのうちの下枠４の内側に、上記ロッド１５は上枠６の内側に、それぞれ配設している。尚、この様な構造を有するパンタグラフ装置１を構成する、上記下枠４の長さＬ₄ （揺動支持軸３の中心と連結軸５の中心との距離）と、上記上枠６の長さＬ₆ （連結軸５の中心と集電舟装置７の揺動支持軸の中心との距離）とは従来、ほぼ等しくしていた。より具体的には、上記下枠４の長さＬ₄ を上記上枠６の長さＬ₆ の０．５〜１．５倍程度（Ｌ₄ ＝０．５Ｌ₆ 〜１．５Ｌ₆ ）としていた。 With the configuration as described above, the posture of the current collecting boat device 7 is not changed regardless of the undulations of the lower frame 4 and the upper frame 6. Each of the lower frame 4 and the upper frame 6 has a hollow tubular shape, and the balancing rod 12 is disposed inside the lower frame 4 and the rod 15 is disposed inside the upper frame 6. Yes. The length L ₄ of the lower frame ₄ (the distance between the center of the swing support shaft 3 and the center of the connecting shaft 5) and the length of the upper frame 6 constituting the pantograph device 1 having such a structure. Conventionally, the length L ₆ (the distance between the center of the connecting shaft 5 and the center of the swing support shaft of the current collecting boat device 7) has been substantially equal. More specifically, the length L ₄ of the lower frame 4 0.5-1.5 times the length L ₆ of the upper frame 6 as _{(L 4 = 0.5L 6 ~1.5L 6} ) It was.

又、近年に於ける鉄道車両の高速化に伴い、パンタグラフ装置部分で発生する気流騒音を低減し、鉄道沿線の環境基準を守る為に、この気流騒音を低減する為の各種構造が考えられている。例えば、特許文献２〜８には、鉄道車両の屋根面上で上記パンタグラフ装置を前後両側から挟む位置にカバーを設けた構造が記載されている。この様な従来構造は、上記鉄道車両の進行方向前側部分に存在するカバーにより空気の流れを上方に導き、上記パンタグラフ装置に当たる空気を希薄にして、このパンタグラフ装置部分でのカルマン渦の発生を抑え、上記気流騒音の低減を図るものである。又、特許文献９には、カバーの形状を流線形にする事により、このカバー部分で発生する気流騒音の低減を図る技術が記載されている。   Also, with the recent increase in the speed of railway vehicles, various structures for reducing this airflow noise have been considered in order to reduce the airflow noise generated in the pantograph device and to keep the environmental standards along the railway. Yes. For example, Patent Documents 2 to 8 describe a structure in which a cover is provided at a position sandwiching the pantograph device from both the front and rear sides on the roof surface of a railway vehicle. Such a conventional structure guides the flow of air upward by a cover existing in the front part of the traveling direction of the railway vehicle, dilutes the air hitting the pantograph device, and suppresses the generation of Karman vortices in the pantograph device part. Therefore, the airflow noise is reduced. Patent Document 9 describes a technique for reducing airflow noise generated in the cover portion by making the shape of the cover streamlined.

又、特許文献１０には、鉄道車両の屋根面上に設けた、上下方向に伸縮自在なカバーにより、パンタグラフ装置のうちで、上端部に設けた集電舟装置部分及び台枠を支持した碍子を除く大部分を覆った構造が記載されている。この様な特許文献１０に記載された構造によれば、このパンタグラフ装置を構成するパンタグラフ枠に殆ど風が当たらない様にして、このパンタグラフ装置部分での気流騒音の発生を低減できる。又、特許文献１１〜１３には、パンタグラフ枠を支持する碍子上に、このパンタグラフ枠と共に支持したカバーにより、このパンタグラフ枠の下半部を覆った構造が記載されている。この様な特許文献１１〜１３に記載された構造によれば、このパンタグラフ枠のうちで鉄道車両の走行に伴って発生する風に当たる部分を少なくして、このパンタグラフ枠部分で発生する気流騒音の低減を図れる。   Further, in Patent Document 10, an insulator that supports a current collecting boat device portion and a base frame provided at an upper end portion of a pantograph device by a vertically extendable cover provided on a roof surface of a railway vehicle. The structure covering most of the area except for is described. According to such a structure described in Patent Document 10, it is possible to reduce the generation of airflow noise in the pantograph device part so that the wind hardly hits the pantograph frame constituting the pantograph device. Patent Documents 11 to 13 describe a structure in which the lower half of the pantograph frame is covered with a cover that is supported together with the pantograph frame on an insulator that supports the pantograph frame. According to such a structure described in Patent Documents 11 to 13, the portion of the pantograph frame that hits the wind generated by the traveling of the railway vehicle is reduced, and the airflow noise generated in the pantograph frame portion is reduced. Reduction can be achieved.

更に、特許文献１４及び非特許文献２には、鉄道車両の屋根面上にパンタグラフ枠を絶縁支持する為の碍子として、水平方向に存在する仮想平面に関する断面形状が流線形のものを使用した構造が記載されている。この様な特許文献１４及び非特許文献２に記載された従来構造の場合には、気流騒音低減用のカバーは、上記碍子の上端部に支持固定された台枠の上面に設けたばね等のみを覆っている。パンタグラフ枠を構成する下枠及び上枠を覆う為のカバーは設けられておらず、これら下枠及び上枠には、鉄道車両の走行に伴う風がそのまま当たる様にしている。   Further, in Patent Document 14 and Non-Patent Document 2, a structure using a streamlined cross-sectional shape related to a virtual plane that exists in the horizontal direction is used as an insulator for insulatingly supporting a pantograph frame on a roof surface of a railway vehicle. Is described. In the case of the conventional structure described in Patent Literature 14 and Non-Patent Literature 2 as described above, the airflow noise reduction cover is provided with only a spring or the like provided on the upper surface of the base frame supported and fixed to the upper end of the insulator. Covering. Covers for covering the lower frame and the upper frame constituting the pantograph frame are not provided, and the wind accompanying the traveling of the railway vehicle is directly applied to the lower frame and the upper frame.

前述の図１１〜１４に示した様な、特許文献１及び非特許文献１に記載されたパンタグラフ装置１の場合、鉄道車両の屋根面上への設置状態で、連結軸５及び釣り合い軸１１部分で気流騒音が生じ易くなる為、改良が望まれている。この点に就いて、図１５〜１６により説明する。
図１５に略示する様に、下枠４の長さＬ₄ と上枠６の長さＬ₆ とがほぼ等しい従来のパンタグラフ装置１の場合には、走行時に起立させた状態では、連結軸５及び釣り合い軸１１部分の高さ位置が高くなる。パンタグラフ装置１を鉄道車両の屋根面に設置する場合には、図１６に略示する様に、台枠２を屋根面１６上に、碍子１７、１７を介して絶縁支持する。又、この屋根面１６でこの台枠２を前後から挟む２個所位置には、前述した特許文献２〜９、非特許文献１に記載されている如く、パンタカバーと呼ばれる防風板１８、１８を設置する。 In the case of the pantograph device 1 described in Patent Document 1 and Non-Patent Document 1 as shown in FIGS. 11 to 14 described above, the connecting shaft 5 and the countershaft 11 portion are installed on the roof surface of the railway vehicle. Therefore, improvement of airflow noise is desired. This point will be described with reference to FIGS.
FIG substantially as that shown in 15, when the lower frame 4 of the length L ₄ and approximately equal conventional pantograph device and length L ₆ of the upper frame 61 is in the state of being erected during traveling, connecting shaft 5 and the height position of the balance shaft 11 are increased. When the pantograph device 1 is installed on the roof surface of a railway vehicle, the frame 2 is insulated and supported on the roof surface 16 via insulators 17 and 17 as schematically shown in FIG. In addition, windbreak plates 18 and 18 called pantera covers are provided at two positions where the frame 2 is sandwiched from the front and back by the roof surface 16 as described in Patent Documents 2 to 9 and Non-Patent Document 1. Install.

上記連結軸５及び釣り合い軸１１部分の高さ位置が高くなると、これら両軸５、１１が上記防風板１８、１８よりも上方に露出し、走行時にこれら両軸５、１１部分に風が当り、高速走行時には気流騒音が発生する。実際の場合には、上記両軸５、１１の設置部分は覆い部材１９（図１１〜１４）により覆っているが、この覆い部材１９が気流騒音の原因となる。上記防風板１８、１８の高さＨ₁₈を大きくする事は、鉄道車両の高速走行時の空気抵抗を増大させる原因となる為、採用する事は難しい。 When the height positions of the connecting shaft 5 and the balance shaft 11 are increased, the shafts 5 and 11 are exposed above the windbreak plates 18 and 18, and wind is applied to the shafts 5 and 11 during traveling. Airflow noise is generated when traveling at high speed. In an actual case, the installation portions of the both shafts 5 and 11 are covered with the covering member 19 (FIGS. 11 to 14), and this covering member 19 causes airflow noise. Increasing the height H 18 of the windshields ₁₈ and ₁₈ is a cause of increasing the air resistance when the railway vehicle is traveling at high speed, and is therefore difficult to employ.

特許文献１０に記載されている様に、伸縮自在なカバーによりパンタグラフ枠の大部分を覆う構造によれば、このパンタグラフ枠部分で発生する気流騒音を大幅に低減できると考えられるが、構造が複雑になる等、現実的ではない。又、碍子部分で発生する気流騒音を抑える事はできない。
又、特許文献１１〜１３に記載されている様に、碍子の上方に設けたカバーにより、パンタグラフ枠の下部を覆う構造の場合には、パンタグラフ枠部分で発生する気流騒音を十分に抑えられないだけでなく、碍子部分で発生する気流騒音を抑える事もできない。
更に、特許文献１４及び非特許文献２に記載されている様に、碍子を流線形にする代わりにカバーを省略した構造の場合には、パンタグラフ枠部分で発生する気流騒音を抑えられない。 As described in Patent Document 10, according to the structure that covers most of the pantograph frame with a stretchable cover, it is considered that the airflow noise generated in this pantograph frame part can be greatly reduced, but the structure is complicated. It is not realistic. Moreover, the airflow noise generated at the insulator cannot be suppressed.
In addition, as described in Patent Documents 11 to 13, in the case of a structure in which the lower part of the pantograph frame is covered with a cover provided above the insulator, airflow noise generated in the pantograph frame part cannot be sufficiently suppressed. In addition, airflow noise generated in the insulator cannot be suppressed.
Further, as described in Patent Document 14 and Non-Patent Document 2, in the case of a structure in which the cover is omitted instead of making the insulator a streamline, airflow noise generated in the pantograph frame portion cannot be suppressed.

この様な事情に鑑みて、特願２００３−２７９６１４号には、パンタグラフ枠部分及び碍子部分で発生する気流騒音を大幅に低減させるべく、図１７〜１８に示す様な構造が開示されている。この図１７〜１８に示すパンタグラフ装置１ａは、台枠２ａの上方にカバー２０を設けると共に、このカバー２０の下面と屋根面との間の空間の前後方向（前後方向に関しては、鉄道車両の走行方向で言う）両端部を、それぞれ端部カバー２１ａ、２１ｂにより塞いでいる。この様な構造によれば、パンタグラフ枠２２の上端部と集電舟装置７とを除く部分に風が勢い良く当たる事を防止して、高速走行時にも、パンタグラフ装置１ａ部分で発生する気流騒音を十分に低く抑える事ができる。   In view of such circumstances, Japanese Patent Application No. 2003-279614 discloses a structure as shown in FIGS. 17 to 18 in order to significantly reduce airflow noise generated in the pantograph frame portion and the insulator portion. The pantograph device 1a shown in FIGS. 17 to 18 is provided with a cover 20 above the underframe 2a, and in the front-rear direction of the space between the lower surface of the cover 20 and the roof surface (with respect to the front-rear direction, the travel of the railway vehicle Both ends are closed by end covers 21a and 21b. According to such a structure, airflow noise generated in the pantograph device 1a portion can be prevented even when traveling at high speed by preventing the wind from striking the portion excluding the upper end portion of the pantograph frame 22 and the current collecting boat device 7. Can be kept low enough.

但し、この様な構造の場合、上記パンタグラフ枠２２を、上記カバー２０に設けた透孔２３を通じて、このカバー２０から上方に突出させる。この様なパンタグラフ枠２２を挿通する上記透孔２３は、このパンタグラフ枠２２の変位（前後方向の揺動と上下方向の揺動とが合わさった変位）を許容すべく、このパンタグラフ枠２２の変位方向（前後方向と上下方向とのうちの少なくとも何れかの方向）に長い長円形とする必要がある。この為、この透孔２３内を空気が流通する事でこの空気の流れが乱れる可能性があり、この様な乱れに基づいて高速走行時に無視できない騒音が生じる可能性がある。   However, in the case of such a structure, the pantograph frame 22 is protruded upward from the cover 20 through a through hole 23 provided in the cover 20. The through-hole 23 inserted through the pantograph frame 22 has a displacement of the pantograph frame 22 so as to allow the displacement of the pantograph frame 22 (displacement in which the swing in the front-rear direction and the swing in the vertical direction are combined). It is necessary to make the shape oval long in the direction (at least one of the front-rear direction and the up-down direction). For this reason, there is a possibility that the air flow may be disturbed by the air flowing through the through holes 23, and noise that cannot be ignored during high-speed traveling may be generated based on such a disturbance.

特許第３２９７３５５号公報Japanese Patent No. 3297355 特開平５−４５８１号公報Japanese Patent Laid-Open No. 5-4581 特開平５−３２８５１３号公報JP-A-5-328513 特開平６−７０４０４号公報JP-A-6-70404 特開平６−２１７４０５号公報JP-A-6-217405 特開平７−３１２８０３号公報JP 7-31803 A 特開平９−１６３５０３号公報JP-A-9-163503 特開平１０−６６２０２号公報Japanese Patent Laid-Open No. 10-66202 特開平９−１３６６４５号公報JP-A-9-136645 特開平６−１１３４０３号公報JP-A-6-113403 特開平６−２０５５０４号公報JP-A-6-205504 特開平８−１９１０６号公報JP-A-8-19106 特開平８−２２３７０２号公報JP-A-8-223702 特開平９−１３０９０７号公報JP-A-9-130907 「鉄道車両と技術」、レール アンド テック出版、平成１３年１ １月２０日、第７巻第５号、通巻第７０号、第１５〜１９頁"Railway Vehicles and Technology", Rail and Tech Publishing, January 20, 2001, Vol. 7, No. 5, Vol. 70, pp. 15-19 「鉄道車両と技術」、レール アンド テック出版、平成１３年１ １月２０日、第７巻第５号、通巻第７０号、第１０〜１４頁"Railway Vehicles and Technology", Rail and Tech Publishing, January 20, 2001, Vol. 7, No. 5, Vol. 70, pp. 10-14

本発明のパンタグラフ装置は、上述の様な事情に鑑みて、パンタグラフ枠を挿通する透孔部分で発生する気流騒音を低減させるべく発明したものである。   The pantograph device of the present invention has been invented in order to reduce airflow noise generated in a through-hole portion through which a pantograph frame is inserted in view of the above-described circumstances.

本発明のパンタグラフ装置は、台枠と、カバーと、パンタグラフ枠と、集電舟装置とを備える。
このうちの台枠は、鉄道車両の屋根面上に、例えば碍子を介して絶縁支持される。
又、上記カバーは、絶縁材製で、一部に上下両面同士を連通させる透孔を有し、上記台枠の上方に設けられている。
又、上記パンタグラフ枠は、上記台枠の上面に起倒自在に設けられ、上記透孔に挿通した状態でその上部を上記カバーの上方に突出させている。
又、上記集電舟装置は、上記パンタグラフ枠の上端部に支持されている。
そして、上記透孔は、上記パンタグラフ枠の変位｛上下方向の揺動と前後方向の揺動とが合わさった変位｝を許容すべくこのパンタグラフ枠の変位方向（上下方向と前後方向とのうちの少なくとも何れかの方向）に長い、例えば長円形の形状としており、この透孔の周縁とこの周縁に対向する上記パンタグラフ枠の外周面との開口部に、上記鉄道車両の運転時に於けるこのパンタグラフ枠の変位に拘らずこの開口部を塞ぐ第二のカバーを設けている。 The pantograph device of the present invention includes a base frame, a cover, a pantograph frame, and a current collecting boat device.
Of these, the underframe is insulated and supported on the roof surface of the railway vehicle via, for example, an insulator.
The cover is made of an insulating material, and has a through-hole that allows the upper and lower surfaces to communicate with each other, and is provided above the frame.
The pantograph frame is provided on the upper surface of the underframe so as to be able to rise and fall, and the upper part of the pantograph frame projects above the cover while being inserted through the through hole.
The current collecting boat device is supported by the upper end of the pantograph frame.
Then, the through hole is provided with a displacement direction of the pantograph frame (a displacement between the vertical direction and the front-rear direction) so as to allow the displacement of the pantograph frame (the displacement obtained by combining the vertical swing and the forward / backward swing). This pantograph has a long oval shape (at least in any direction), for example, and has an opening formed between the periphery of the through hole and the outer peripheral surface of the pantograph frame facing the periphery. A second cover is provided to close the opening regardless of the displacement of the frame.

上述の様に構成する本発明のパンタグラフ装置の場合には、カバーに設けた透孔の周縁とパンタグラフ枠の外周面との開口部を第二のカバーにより塞ぐ為、この開口部を空気が流通する事がない。この結果、この様な開口部を空気が流通する事による騒音を防止でき、高速走行時にもパンタグラフ装置部分で発生する気流騒音を十分に低く抑える事ができる。   In the case of the pantograph device of the present invention configured as described above, the second cover covers the opening between the periphery of the through hole provided in the cover and the outer peripheral surface of the pantograph frame, so that air flows through the opening. There is nothing to do. As a result, noise caused by air flowing through such an opening can be prevented, and airflow noise generated in the pantograph device can be sufficiently reduced even during high-speed traveling.

本発明を実施する場合に好ましくは、請求項２に記載した様に、第二のカバーを、第一、第二カバー素子を備えたものとする。
このうちの第一カバー素子は、透孔の周縁とこの周縁に対向するパンタグラフ枠の外周面との開口部のうちで、運転時に集電舟装置の下降に伴って拡がる部分を、この部分の拡縮に拘らず塞ぐものとする。
又、上記第二カバー素子は、上記透孔の周縁とこの周縁に対向する上記パンタグラフ枠の外周面との開口部のうちで、運転時に上記集電舟装置の上昇に伴って拡がる部分を、この部分の拡縮に拘らず塞ぐものとする。
この様に構成すれば、上記開口部を上記パンタグラフ枠の運転時の変位（上下方向の揺動と前後方向の揺動とが合わさった変位）に拘らず塞ぐ事ができる。 When the present invention is implemented, preferably, as described in claim 2, the second cover includes the first and second cover elements.
Of these, the first cover element has a portion that expands with the lowering of the current collecting boat device during operation in the opening of the peripheral edge of the through hole and the outer peripheral surface of the pantograph frame facing the peripheral edge. It shall be closed regardless of scaling.
Further, the second cover element is a portion of the opening of the peripheral edge of the through-hole and the outer peripheral surface of the pantograph frame facing the peripheral edge that expands as the current collector boat rises during operation. It shall be closed regardless of expansion / contraction of this part.
If comprised in this way, the said opening part can be plugged up irrespective of the displacement at the time of the driving | running | working of the said pantograph frame (displacement which the rocking | fluctuation of the up-down direction and the rocking | fluctuation of the front-back direction combined).

又、上記請求項２に係る発明を実施する場合に好ましくは、請求項３に記載した様に、第二のカバーを、第一、第二カバー素子と共に、第三カバー素子を備えたものとする。
このうちの第一カバー素子は、透孔の周縁とこの周縁に対向するパンタグラフ枠の外周面との開口部のうちで、集電舟装置を運転時の最高高さ位置から運転時の最低高さに位置にまで下降させる際に拡がる部分を、この部分の拡縮に拘らず塞ぐものとする。
又、上記第二カバー素子は、上記透孔の周縁とこの周縁に対向する上記パンタグラフ枠の外周面との開口部のうちで、上記集電舟装置を運転時の最低高さ位置から運転時の最高高さに位置にまで上昇させる際に拡がる部分を、この部分の拡縮に拘らず塞ぐものとする。
又、上記第三カバー素子は、上記透孔の周縁とこの周縁に対向する上記パンタグラフ枠の外周面との開口部のうちで、上記パンタグラフ枠を畳んだ状態から起立させて上記集電舟装置を運転時の最低高さ位置にまで上昇させる際に拡がる部分を、上記パンタグラフ枠が起立している間塞ぐものである。
この様に構成すれば、上記パンタグラフ枠を起立させた状態で、上記開口部のうちの運転時にこのパンタグラフ枠の変位に基づいて拡縮する部分を、構造を複雑にする事なく、それぞれのカバー素子により塞ぐ事ができる。 In carrying out the invention according to the second aspect, preferably, as described in the third aspect, the second cover is provided with the third cover element together with the first and second cover elements. To do.
Of these, the first cover element has an opening between the peripheral edge of the through-hole and the outer peripheral surface of the pantograph frame facing the peripheral edge. In addition, the portion that expands when lowered to the position is closed regardless of the expansion / contraction of this portion.
In addition, the second cover element is configured such that when the current collecting boat device is operated from the lowest height position during operation, the opening is formed between the periphery of the through hole and the outer peripheral surface of the pantograph frame facing the periphery. The portion that expands when it is raised to its maximum height is closed regardless of the expansion or contraction of this portion.
Further, the third cover element is erected from the folded state of the pantograph frame in an opening portion between a peripheral edge of the through hole and an outer peripheral surface of the pantograph frame facing the peripheral edge, and the current collecting boat device The portion that expands when the vehicle is raised to the lowest position during operation is closed while the pantograph frame is standing.
If comprised in this way, in the state which stood up the said pantograph frame, the part which expands / contracts based on the displacement of this pantograph frame at the time of the driving | running | working of each said opening element without making a structure complicated. Can be blocked by.

又、好ましくは、請求項４に記載した様に、上記台枠上でパンタグラフ枠を起倒させる為に、このパンタグラフ枠を、下枠と、上枠と、釣り合い腕と、釣り合い棒とから構成する。
このうちの下枠は、上記台枠上に設けられた第一の横軸により、その基端部を揺動自在に支持されたものとする。
又、上記上枠は、上記下枠の先端部に上記第一の横軸と平行に設けられた第二の横軸により、その基端部を揺動自在に支持されたものとする。
又、上記釣り合い腕は、上記上枠の基端部から突出する状態で設けられてこの上枠に対しその基端部を結合固定され、この上枠と共に上記第二の横軸を中心として揺動するものとする。
又、上記釣り合い腕は、上記釣り合い腕の先端部に上記第一、第二の横軸と平行に設けられた第三の横軸によりその先端部を揺動自在に支持され、これら第一〜第三の横軸と平行に設けられた第四の横軸によりその基端部を上記台枠に対し揺動自在に支持されたものとする。
そして、上記下枠の長さを、上記上枠の長さの１／６〜１／３倍とし、上記上枠をカバーに設けた透孔を通じてこのカバーの上方に突出させ、この上枠の上端部に集電舟装置を支持する。
この様に構成すれば、下枠の長さを短くした分、第二、第三の横軸の設置部分を低くできる。この為、上記カバーの高さ位置を低く抑えても、下枠及び上枠の起立状態での上記第二、第三の横軸の高さ位置を、上記カバーの下側に位置させる事ができる。この結果、このカバーの高さを低く抑えて、高速走行時に発生する気流騒音のより一層の低減と、空気抵抗の低減とを図れる。 Preferably, as described in claim 4, in order to raise and lower the pantograph frame on the underframe, the pantograph frame is composed of a lower frame, an upper frame, a balance arm, and a balance bar. To do.
Of these, the lower frame is supported by a first horizontal axis provided on the underframe so that its base end is swingably supported.
The upper frame has a base end portion swingably supported by a second horizontal axis provided in parallel to the first horizontal axis at a distal end portion of the lower frame.
The counter arm is provided so as to protrude from the base end portion of the upper frame, and the base end portion is coupled and fixed to the upper frame, and the counter arm swings around the second horizontal axis together with the upper frame. It shall move.
The balance arm is supported at the tip end portion of the balance arm by a third horizontal shaft provided in parallel with the first and second horizontal shafts so as to be swingable. It is assumed that the base end portion of the fourth horizontal axis provided in parallel with the third horizontal axis is supported to be swingable with respect to the frame.
Then, the length of the lower frame is set to 1/6 to 1/3 times the length of the upper frame, and the upper frame is protruded above the cover through a through hole provided in the cover. A current collecting boat device is supported at the upper end.
If comprised in this way, the installation part of a 2nd, 3rd horizontal axis can be made low by the part which shortened the length of the lower frame. For this reason, even if the height position of the cover is kept low, the height positions of the second and third horizontal axes in the standing state of the lower frame and the upper frame can be positioned below the cover. it can. As a result, the height of the cover can be kept low, and airflow noise generated during high-speed running can be further reduced and air resistance can be reduced.

図１〜１０は、本発明の実施例を示している。本実施例のパンタグラフ装置１ｂは、台枠２ｂと、カバー２０ａと、パンタグラフ枠２２ａと、集電舟装置７とを備える。
このうちの台枠２ｂは、前述の図１１〜１８に示したパンタグラフ装置１、１ａを構成する台枠２、２ａと同様に、金属板を曲げ形成する等により造られたもので、鉄道車両の屋根面１６上に、複数の碍子１７、１７を介して絶縁支持される。 1 to 10 show an embodiment of the present invention. The pantograph device 1b of the present embodiment includes a frame 2b, a cover 20a, a pantograph frame 22a, and a current collecting boat device 7.
Of these, the underframe 2b is formed by bending a metal plate or the like, similar to the underframes 2 and 2a constituting the pantograph devices 1 and 1a shown in FIGS. The roof surface 16 is insulated and supported via a plurality of insulators 17 and 17.

又、上記カバー２０ａは、エチレン酢酸ビニル共重合体（ＥＶＡ copolymer）や各種ＦＲＰの如き合成樹脂等の絶縁材製で、上記台枠２ｂの上方に、ブラケットを介してこの台枠２ｂに支持する等により、この台枠２ｂの上面全体を覆う状態で設けられている。本実施例の場合、上記カバー２０ａは、上面を大きな曲率半径を有する部分球面状の凸面とした天板部２４と、この天板部２４の幅方向（幅方向に関しては鉄道車両の幅方向で言う）両端縁から下方に折れ曲がった、左右１対の側板部２５とを備える。又、上記天板部２４の前後方向（前後方向に関しては、鉄道車両の走行方向で言う）片半部（図１〜２の左半部）で幅方向中間部には、上記天板部２４の本体部分の上面に比べ比較的小さな曲率半径で膨らんだ、膨出部２６を設けている。そして、この膨出部２６のうち、上記天板部２４の中央寄り半部で幅方向中間部に、前後方向に長い長円形の透孔２３ａを、この天板部２４の上下両面同士を連通させる状態で形成している。   The cover 20a is made of an insulating material such as an ethylene vinyl acetate copolymer (EVA copolymer) or various types of FRP, and is supported on the frame 2b via a bracket above the frame 2b. Etc., so as to cover the entire top surface of the underframe 2b. In the case of the present embodiment, the cover 20a has a top plate portion 24 whose upper surface has a partially spherical convex surface having a large radius of curvature, and the width direction of the top plate portion 24 (with respect to the width direction, the width direction of the railway vehicle). And a pair of left and right side plate portions 25 bent downward from both end edges. In addition, the top plate portion 24 is provided in the front-rear direction of the top plate portion 24 (the front-rear direction is referred to as the traveling direction of the railway vehicle) and at the middle portion in the width direction of the half portion (left half portion in FIGS. A bulging portion 26 swelled with a relatively small radius of curvature is provided. Of the bulging portion 26, an oblong through hole 23 a that is long in the front-rear direction is connected to the middle portion in the width direction at the center half of the top plate portion 24, and the upper and lower surfaces of the top plate portion 24 are communicated with each other. It is formed in a state to let it.

本実施例の場合、上記透孔２３ａは、上記天板部２４のうちの膨出部２６の曲面に沿って開口しており、その開口縁の展開形状は、図５に示す様に、それぞれが半円形状の１対の円弧部２７ａ、２７ｂと、これら円弧部２７ａ、２７ｂの両端縁同士を結ぶ１対の直線部２８、２８とから成る長円形である。このうちの各円弧部２７ａ、２７ｂは、上記透孔２３ａの前後方向両端部に設けられ、それぞれが前記パンタグラフ枠２２ａを構成する上枠６ａの外周面とほぼ同じ曲率を有する。又、上記各直線部２８、２８は、幅方向に関して上記上枠６ａの外径とほぼ同じ（外径より僅かに大きい）距離だけ離隔した状態で、互いに平行に設けられている。そして、この様な開口縁を有する上記透孔２３ａの内側に、上記上枠６ａを（上下方向及び前後方向の揺動を自在に）挿通している。   In the case of the present embodiment, the through hole 23a is open along the curved surface of the bulging portion 26 of the top plate portion 24, and the developed shape of the opening edge is as shown in FIG. Is an oval shape composed of a pair of semicircular arc portions 27a, 27b and a pair of straight portions 28, 28 connecting both ends of the arc portions 27a, 27b. Of these, the arc portions 27a and 27b are provided at both ends in the front-rear direction of the through hole 23a, and each has substantially the same curvature as the outer peripheral surface of the upper frame 6a constituting the pantograph frame 22a. The linear portions 28 are provided in parallel with each other in a state where they are separated from each other by a distance substantially the same as the outer diameter of the upper frame 6a (slightly larger than the outer diameter) in the width direction. Then, the upper frame 6a is inserted into the through-hole 23a having such an opening edge (movable in the vertical direction and the front-rear direction).

又、上記パンタグラフ枠２２ａは、前記台枠２ｂの上面に起倒自在に設けられ、上記透孔２３ａを通じてその上部が、上記カバー２０ａの上方に突出している。この様なパンタグラフ枠２２ａとして本実施例の場合には、図１０に略示する様な構造のものを使用している。即ち、上記台枠２ｂの上面に、第一の横軸である揺動支持軸３ａを、車両の幅方向に設けている。そして、この揺動支持軸３ａの中間部に、下枠４ａの基端部（下端部）を固定している。従ってこの下枠４ａは、この揺動支持軸３ａを中心として起伏する。又、この下枠４ａの先端部（上端部）に、第二の横軸である連結軸５ａを、上記揺動支持軸３ａと平行に設けている。そして、この連結軸５ａにより、上枠６ａの基端部（下端部）を上記下枠４ａの先端部に、揺動変位自在に結合している。更に、上記上枠６ａの先端部（上端部）に、前記集電舟装置７を支持している。そして、上記揺動支持軸３ａと上記台枠２ｂとの間に設けたばね８（図１１、１２参照）により、上記下枠４ａと上枠６ａとに、畳んだ状態から起立させる方向の弾力を付与している。   The pantograph frame 22a is provided on the upper surface of the frame 2b so that it can be raised and lowered, and the upper part of the pantograph frame 22a projects above the cover 20a through the through hole 23a. In the case of the present embodiment, such a pantograph frame 22a having a structure as schematically shown in FIG. 10 is used. That is, the swing support shaft 3a, which is the first horizontal axis, is provided on the upper surface of the underframe 2b in the vehicle width direction. And the base end part (lower end part) of the lower frame 4a is being fixed to the intermediate part of this rocking | fluctuation support shaft 3a. Accordingly, the lower frame 4a undulates around the swing support shaft 3a. A connecting shaft 5a, which is a second horizontal axis, is provided in parallel to the swing support shaft 3a at the tip (upper end) of the lower frame 4a. The connecting shaft 5a connects the base end portion (lower end portion) of the upper frame 6a to the distal end portion of the lower frame 4a so as to be swingably displaceable. Further, the current collecting boat device 7 is supported at the tip (upper end) of the upper frame 6a. And the spring 8 (refer FIG. 11, 12) provided between the said rocking | fluctuation support shaft 3a and the said base frame 2b gives the elasticity of the direction which makes the said lower frame 4a and the upper frame 6a stand up from the folded state. Has been granted.

鉄道車両の走行時（運転時）に上記集電舟装置７は、前記屋根面１６上に支持した上記台枠２ｂと架線との距離の変化に対応して、上記下枠４ａと上記上枠６ａとの交差角度を変化させつつ、上記台枠２ｂに対し昇降する。この場合でも、上記集電舟装置７の姿勢を一定として、この集電舟装置７の上面に支持した摺り板９と上記架線の下縁との摺接状態が適正に維持される様にしている。この為に、上記下枠４ａの先端部と上記上枠６ａの基端部との連結部、並びにこの上枠６ａの先端部と上記集電舟装置７との連結部には、適宜のリンク機構を設けて、上記下枠４ａ及び上枠６ａの起伏に拘らず、上記集電舟装置７の姿勢が変化しない様にしている。   When the railway vehicle is running (during driving), the current collecting boat device 7 responds to a change in the distance between the underframe 2b supported on the roof surface 16 and the overhead wire, and the lower frame 4a and the upper frame. It moves up and down with respect to the frame 2b while changing the crossing angle with 6a. Even in this case, with the attitude of the current collecting boat device 7 fixed, the sliding contact state between the sliding plate 9 supported on the upper surface of the current collecting boat device 7 and the lower edge of the overhead wire is properly maintained. Yes. For this purpose, there are appropriate links between the connecting portion between the distal end portion of the lower frame 4a and the proximal end portion of the upper frame 6a, and the connecting portion between the distal end portion of the upper frame 6a and the current collecting boat device 7. A mechanism is provided so that the posture of the current collecting boat device 7 does not change regardless of the undulations of the lower frame 4a and the upper frame 6a.

具体的には、上記上枠６ａの基端部に釣り合い腕１０ａの基端部を、この上枠６ａの基端部から、この上枠６ａの先端部とは逆方向に突出する状態で結合固定し、この釣り合い腕１０ａをこの上枠６ａと共に、上記連結軸５ａを中心として揺動する様にしている。又、この釣り合い腕１０ａの先端部に、第三の横軸である釣り合い軸１１ａを、上記揺動支持軸３ａ及び連結軸５ａと平行に設け、この釣り合い軸１１ａに、釣り合い棒１２ａの先端部（上端部）を、揺動変位自在に支持している。又、この釣り合い棒１２ａの基端部（下端部）を前記台枠２ｂの上面に、第四の横軸であって上記釣り合い軸１１ａと平行に設けられた下部釣り合い軸１３ａにより、揺動変位自在に支持している。更に、上記集電舟装置７の下面に設けたリンク腕１４の先端部と、上記下枠４ａの先端部に固定された部分（この下枠４ａの起伏に伴って揺動変位する部分）とに、ロッド１５の両端部を揺動変位自在に連結している。   Specifically, the base end portion of the counter arm 10a is joined to the base end portion of the upper frame 6a so as to protrude from the base end portion of the upper frame 6a in the direction opposite to the front end portion of the upper frame 6a. The balance arm 10a is rocked around the connecting shaft 5a together with the upper frame 6a. Further, a balance shaft 11a which is a third horizontal axis is provided at the tip of the balance arm 10a in parallel with the swing support shaft 3a and the connecting shaft 5a. The (upper end) is supported so as to be swingable and displaceable. Further, the base end portion (lower end portion) of the balance rod 12a is oscillated and displaced by the lower balance shaft 13a, which is provided on the upper surface of the frame 2b as a fourth horizontal axis and parallel to the balance shaft 11a. Supports freely. Furthermore, the tip of the link arm 14 provided on the lower surface of the current collector boat device 7 and a portion fixed to the tip of the lower frame 4a (a portion that swings and displaces as the lower frame 4a undulates) Further, both end portions of the rod 15 are connected so as to be swingable and displaceable.

上述の様な構成により、上記下枠４ａ及び上枠６ａの起伏に拘らず、上記集電舟装置７の姿勢が変化しない（摺り板９の上面を水平に保つ）様にしている。尚、本実施例の場合、上記上枠６ａを中空管状とし、この中空管状の上枠６ａの内側に、上記ロッド１５を配設する。これに対して上記釣り合い棒１２ａは、上記下枠４ａ外に配置する。即ち、上記釣り合い棒１２ａは上記下枠４ａと共に前記カバー２０ａにより覆われる。この為、この下枠４ａを中空管状とすると共に、この中空管状とした下枠の内側に上記釣り合い棒１２ａを配設する必要はない（する事は自由である）。   With the configuration as described above, the posture of the current collecting boat device 7 is not changed (the upper surface of the sliding plate 9 is kept horizontal) regardless of the undulations of the lower frame 4a and the upper frame 6a. In the case of the present embodiment, the upper frame 6a has a hollow tubular shape, and the rod 15 is disposed inside the hollow tubular upper frame 6a. On the other hand, the balance rod 12a is disposed outside the lower frame 4a. That is, the balancing rod 12a is covered with the cover 20a together with the lower frame 4a. Therefore, the lower frame 4a has a hollow tubular shape, and the balancing rod 12a does not need to be disposed inside the hollow tubular lower frame (it is free to do so).

この様に構成する本実施例の場合、図１０に示す様に、上記パンタグラフ枠２２ａを構成する上記下枠４ａの長さＬ_4a（揺動支持軸３ａの中心と連結軸５ａの中心との距離）を、上記上枠６ａの長さＬ_6a（連結軸５ａの中心と集電舟装置７の揺動支持軸の中心との距離）に比べて十分に小さく（Ｌ_4a≪Ｌ_6a）している。より具体的には、上記下枠４ａの長さＬ_4aを、上記上枠６ａの長さＬ_6aの１／６〜１／３倍（Ｌ_4a＝Ｌ_6a／６〜Ｌ_6a／３）としている。この様に下枠４ａの長さＬ_4aを十分に短くした本実施例の場合には、この下枠４ａの長さＬ_4aを短くした分だけ、上記連結軸５ａ及び釣り合い軸１１ａの設置部分を低くできる。この為、前記カバー２０ａの高さ位置を低く抑えても、上記下枠４ａ及び上枠６ａの起立状態で上記連結軸５ａ及び前記釣り合い軸１１ａの設置部分を、上記カバー２０ａの下側に位置させる事ができる。この結果、このカバー２０ａの高さを低く抑えて、高速走行時に発生する気流騒音の低減と、空気抵抗の低減とを図れる。 In the case of this embodiment configured as described above, as shown in FIG. 10, the length L _4a of the lower frame 4a constituting the pantograph frame 22a (the center of the swing support shaft 3a and the center of the connecting shaft 5a). the distance), and sufficiently small (L _4a «L _6a) than the length L _6a of the upper frame 6a (distance between the center of the pivot support shaft and the center of the collector vessel 7 of the connecting shaft 5a) ing. More specifically, the length L _4a of the lower frame 4a is set to 1/6 to 1/3 times the length L _6a of the upper frame 6a (L _4a = L _6a / _{6 to} L _6a / 3). Yes. In the case of the present embodiment in which the length L _4a of the lower frame 4a is sufficiently shortened in this way, the installation portions of the connecting shaft 5a and the balance shaft 11a are reduced by the length L _4a of the lower frame 4a. Can be lowered. For this reason, even if the height position of the cover 20a is kept low, the installation portions of the connecting shaft 5a and the balance shaft 11a are positioned below the cover 20a with the lower frame 4a and the upper frame 6a standing. You can make it. As a result, the height of the cover 20a can be kept low to reduce airflow noise generated during high speed running and to reduce air resistance.

尚、上記下枠４ａの長さＬ_4aが上記上枠６ａの長さＬ_6aの１／６未満（Ｌ_4a＜Ｌ_6a／６）の場合には、上記釣り合い棒１２ａを設置する事による上記上枠６ａの支持剛性の確保が不十分となる。これに対して、上記下枠４ａの長さＬ_4aが上記上枠６ａの長さＬ_6aの１／３を越える（Ｌ_4a＞Ｌ_6a／３）場合には、上記連結軸５ａ及び釣り合い軸１１ａの設置部分を十分に低くできず、上記カバー２０の高さを十分に低く抑える事ができない。この為、上記下枠４ａの長さＬ_4aを、上記上枠６の長さＬ_6aの１／６〜１／３倍としている。 Incidentally, when the length L _4a of the lower frame 4a is less than 1/6 of the length L _6a of the upper frame _{6a (L 4a <L 6a /} 6) , said by placing the balance bar 12a Ensuring the support rigidity of the upper frame 6a is insufficient. In contrast, when the length L _4a of the lower frame 4a exceeds 1/3 of the length L _6a of the upper frame _{6a (L 4a> L 6a /} 3) , said connecting shaft 5a and balance shaft The installation part of 11a cannot be made low enough, and the height of the cover 20 cannot be made low enough. For this reason, the length L _4a of the lower frame 4a is set to 1/6 to 1/3 times the length L _6a of the upper frame 6.

又、本実施例の場合、より一層の気流騒音の低減を図るべく、上記カバー２０ａに設けた前記透孔２３ａの内面とこの内面に対向する上記上枠６ａの外周面との開口部に、この上枠６ａの変位（上下方向の揺動と前後方向の揺動とが合わさった変位）に拘らずこの開口部を塞ぐ、第二のカバー２９を設けている。即ち、上記パンタグラフ枠２２ａを畳んだ状態から起立させる際、起立させた状態から畳む際、更には運転時に前記集電舟装置７が屋根面１６と架線との距離の変化に対応して昇降する際に、上記上枠６ａが上記透孔２３ａ内で変位（上下方向及び前後方向に揺動）する事により、上記開口部の形状（開口面積）が変化しても、この変化に対応してこの開口部を塞ぐ事のできる上記第二のカバー２９を、この開口部に設けている。本実施例の場合にはこの様な第二のカバー２９を、各種ＦＲＰの如き合成樹脂等の絶縁材によりそれぞれ形成した、第一、第二、第三カバー素子３０、３１、３２により構成している。 Further, in the case of the present embodiment, in order to further reduce the airflow noise, in the opening portion between the inner surface of the through hole 23a provided in the cover 20a and the outer peripheral surface of the upper frame 6a facing the inner surface, A second cover 29 is provided to close the opening regardless of the displacement of the upper frame 6a (displacement in which the vertical swing and the forward / backward swing are combined). That is, when raising the pantograph frame 22a from the folded state, folding the pantograph frame 22a from the raised state, and further during operation, the current collecting boat device 7 moves up and down in response to a change in the distance between the roof surface 16 and the overhead wire. At this time, even if the shape (opening area) of the opening changes due to the upper frame 6a being displaced (swaying in the vertical direction and the front-rear direction) in the through-hole 23a, the second cover 29 that can be close the opening, is provided in the opening. In the case of the present embodiment, such a second cover 29 is constituted by first, second, and third cover elements 30, 31, and 32 formed of an insulating material such as synthetic resin such as various FRPs. ing.

このうちの第一カバー素子３０は、上記透孔２３ａの周縁とこの周縁に対向する上記上枠６ａの外周面との開口部のうちで、運転時に上記集電舟装置７の下降に伴って拡がる部分、即ち、図１及び図５にαで示す部分を、この部分の拡縮に拘らず塞ぐものである。言い換えれば、図２に示す様に、前記集電舟装置７をこの図２の（６）に示す運転時の最高高さ位置から、この図２の（１）に示す運転時の最低高さに位置にまで下降させる際に、上記開口部のうちで拡がる部分（α部分）を、上記第一カバー素子３０により塞いでいる。本実施例の場合、この第一カバー素子３０は、前後方向に関する形状（側面から見た形状）を、中間部を頂部３３とした山状（略く字状）としており、上記上枠６ａの基端寄り部（透孔２３ａの周縁と対向する部分）の上半部に固定される。   Of these, the first cover element 30 has an opening of the peripheral edge of the through hole 23a and the outer peripheral surface of the upper frame 6a facing the peripheral edge, and the current collecting boat device 7 is lowered during operation. The expanding portion, that is, the portion indicated by α in FIGS. 1 and 5 is closed regardless of the expansion or contraction of this portion. In other words, as shown in FIG. 2, the current collector boat 7 is moved from the highest height position during operation shown in (6) of FIG. 2 to the lowest height during operation shown in (1) of FIG. When the position is lowered to the position, the portion (α portion) that expands in the opening is closed by the first cover element 30. In the case of the present embodiment, the first cover element 30 has a shape (viewed from the side) in the front-rear direction as a mountain shape (substantially square shape) with the middle portion as the top portion 33, and the upper frame 6 a It is fixed to the upper half part near the base end (the part facing the peripheral edge of the through hole 23a).

又、上記第一カバー素子３０は、幅方向の断面を略Ｕ字状としており、上記上枠６ａに固定した状態でこの上枠６ａから離れる方向に突出した凸曲面状の曲面部３４と、この曲面部３４の幅方向両端からそれぞれ連続する状態で互いに平行に設けられた１対の側面部３５、３５とを有する。このうちの曲面部３４は、幅方向に関する断面形状を、上記上枠６ａの外周面及び上記透孔２３ａの前後方向片端部（図１〜２の左端部、図５の上端部）を構成する円弧部２７ａとほぼ同じ形状（上枠６ａの外周面及び透孔２３ａの円弧部２７ａに沿った形状）としている。即ち、本実施例の場合には、上記曲面部３４の幅方向に関する曲率を、上記上枠６ａの外周面の曲率及び上記透孔２３ａの円弧部２７ａの曲率とほぼ同じとしている。又、上記第一カバー素子３０の幅方向に関する（内部も塞がれていると仮定した状態での）断面積を、前後方向中間部に設けた上記頂部３３で最大とすると共に、前後方向両端縁に向かう程徐々に小さくなる様にしている。   The first cover element 30 has a substantially U-shaped cross section in the width direction, and a convex curved surface portion 34 protruding in a direction away from the upper frame 6a while being fixed to the upper frame 6a, The curved surface portion 34 has a pair of side surface portions 35, 35 provided in parallel with each other in a continuous state from both ends in the width direction. Of these, the curved surface portion 34 has a cross-sectional shape in the width direction that constitutes the outer peripheral surface of the upper frame 6a and one end portion in the front-rear direction of the through hole 23a (the left end portion in FIGS. 1 and 2 and the upper end portion in FIG. 5). The shape is substantially the same as the arc portion 27a (the shape along the outer peripheral surface of the upper frame 6a and the arc portion 27a of the through hole 23a). That is, in the present embodiment, the curvature of the curved surface portion 34 in the width direction is substantially the same as the curvature of the outer peripheral surface of the upper frame 6a and the curvature of the arc portion 27a of the through hole 23a. The cross-sectional area of the first cover element 30 in the width direction (assuming that the inside is also closed) is maximized at the top portion 33 provided at the middle portion in the front-rear direction and both ends in the front-rear direction. It is designed to become smaller gradually toward the edge.

又、上記各側面部３５、３５は、上記上枠６ａの上半部にそれぞれねじ４０により固定した複数（図示の例の場合３個）の支持ブロック３９、３９を、幅方向両側から挟持した状態で、これら各支持ブロック３９、３９に別のねじ４１、４１により固定する。この様に上記各側面部３５、３５を上記各支持ブロック３９、３９に固定する事により、上記第一カバー素子３０を上記上枠６ａの基端寄り部分の上半部に固定する。この状態で、上記側面部３５、３５の外側面（互いに反対側の側面）同士の間隔は、上記上枠６ａの外径とほぼ同じとなる。そして、この上枠６ａの外周面と上記各側面部３５、３５の下端縁との段差部分にシリコン剤等のコーキング剤を埋め込んで、これら各外側面部３５、３５の下端縁と上記上枠６ａの外周面とを滑らかに連続させる。 Each of the side surface portions 35, 35 sandwiches a plurality of (three in the illustrated example) support blocks 39, 39 fixed to the upper half of the upper frame 6a by screws 40 from both sides in the width direction. In this state, the support blocks 39 and 39 are fixed to the support blocks 39 and 39 with different screws 41 and 41, respectively. In this way, by fixing the side portions 35, 35 to the support blocks 39, 39, the first cover element 30 is fixed to the upper half of the upper frame 6a. In this state, the distance between the outer side surfaces (side surfaces opposite to each other) of the side surface portions 35, 35 is substantially the same as the outer diameter of the upper frame 6a. Then, a caulking agent such as a silicon agent is embedded in a step portion between the outer peripheral surface of the upper frame 6a and the lower end edge of each side surface portion 35, 35, and the lower end edge of each outer surface portion 35, 35 and the upper frame 6a. Smoothly and continuously with the outer peripheral surface.

又、上記第一カバー素子３０の頂部３３は、図２の（１）に示す様に、上記集電舟装置７が運転時の最低高さ位置となった状態で、上記透孔２３ａの片端部を構成する上記円弧部２７ａに近接対向する。この状態から、図２の（２）〜（６）に示す様に、上記集電舟装置７が運転時の最高高さ位置に向けて上昇すると、上記第一カバー素子３０が上記上枠６ａと共に、上方（図１〜２、５の上方）に変位すると同時に、前後方向に関して一方（図１〜２の右方）に変位する。そして、この様な変位に伴って、上記第一カバー素子３０の前後方向片半部（図１〜２の左半部）外周面、即ち上記曲面部３４のうちの上記頂部３３から片端縁（図１〜２の左端縁）に至る部分が、上記透孔２３ａの円弧部２７ａと常に同じ距離を保った状態で近接対向する。   Further, as shown in FIG. 2 (1), the top 33 of the first cover element 30 has one end of the through hole 23a in a state where the current collecting boat device 7 is at the lowest height position during operation. It faces the arc portion 27a that constitutes the portion. From this state, as shown in (2) to (6) of FIG. 2, when the current collecting boat device 7 is raised toward the maximum height position during operation, the first cover element 30 is moved to the upper frame 6a. At the same time, it is displaced upward (upward in FIGS. 1 and 2 and 5), and at the same time is displaced in one direction (rightward in FIGS. 1 and 2) in the front-rear direction. And with such a displacement, one end edge (from the top part 33 of the curved surface part 34 of the outer peripheral surface of the front-back direction half part (left half part of FIGS. 1-2) of the said 1st cover element 30, ie, the said curved surface part 34 ( The portion that reaches the left edge in FIGS. 1 and 2 is close to and opposed to the circular arc portion 27a of the through hole 23a in a state that always maintains the same distance.

一方、上記図２の（６）に示す様に、上記集電舟装置７が運転時の最高高さ位置となった状態で、上記第一カバー素子３０の前後方向片端縁が、上記透孔２３ａの円弧部２７ａに近接対向する。この状態から、図２の（５）〜（１）に示す様に、上記集電舟装置７が運転時の最底高さ位置に向けて下降すると、上記第一カバー素子３０が上記上枠６ａと共に、下方（図１〜２、５の下方）に変位すると同時に、前後方向に関して他方（図１〜２の左方）に変位する。そして、この様な変位に伴って、上記第一カバー素子３０の前後方向片半部外周面（曲面部３４のうちの頂部３３から片端縁に至る部分）が、上述した集電舟装置７の上昇時と同様に、上記透孔２３ａの円弧部２７ａと常に同じ距離を保った状態で近接対向する。   On the other hand, as shown in FIG. 2 (6), in the state where the current collecting boat device 7 is at the highest height position during operation, the one end edge of the first cover element 30 in the front-rear direction is the through hole. It is close to and faces the arc portion 27a of 23a. From this state, as shown in (5) to (1) of FIG. 2, when the current collecting boat device 7 is lowered toward the lowest position during operation, the first cover element 30 is moved to the upper frame. 6a is displaced downward (downward in FIGS. 1 and 2 and 5), and at the same time is displaced in the other direction (leftward in FIGS. 1 and 2) in the front-rear direction. And with such a displacement, the front-rear direction one-half outer peripheral surface of the first cover element 30 (the portion of the curved surface portion 34 extending from the top 33 to one end edge) of the current collecting boat device 7 described above is used. As in the ascending state, they face each other in close proximity to the arc portion 27a of the through hole 23a while maintaining the same distance.

本実施例の場合、この様に第一カバー素子３０が上枠６ａと共に変位しても、この第一カバー素子３０の前後方向片半部外周面が上記円弧部２７ａに、常に同じ距離を保った状態で近接対向する。言い換えれば、この様に第一カバー素子３０の前後方向片半部が上記円弧部２７ａに常に同じ距離を保った状態で近接対向する様に、この第一カバー素子３０の前後方向片半部の断面形状を規制している。そして、この様に規制する事で、前記開口部のうちの図１及び図５にαで示す部分を、この開口部の拡縮に拘らず塞いでいる。   In the case of the present embodiment, even if the first cover element 30 is displaced together with the upper frame 6a in this way, the outer circumferential surface of the half portion in the front-rear direction of the first cover element 30 always keeps the same distance from the arc portion 27a. In close proximity. In other words, the front-rear direction half of the first cover element 30 is in close proximity to the arcuate part 27a while maintaining the same distance at all times. The cross-sectional shape is regulated. And by restrict | limiting in this way, the part shown by (alpha) in FIG.1 and FIG.5 of the said opening part is plugged up irrespective of expansion / contraction of this opening part.

尚、上記第一カバー素子３０の前後方向他半部（図１〜２の右半部）外周面、即ち、上記曲面部３４のうちの上記頂部３３から他端縁（図１〜２の右端縁）に至る部分は、図２の（１）に示す様な上記集電舟装置７が運転時の最低高さ位置となった状態で、前記カバー２０ａの膨出部２６から突出しない様に（突出したとしても空気の流れを乱さない程度と）する。言い換えれば、上記第一カバー素子３０の前後方向他半部外周面は、上記図２の（１）に示す状態（集電舟装置７が運転時の最低高さ位置となった状態）で、上記膨出部２６の前後方向に関する曲面にほぼ沿う様な形状とする。   In addition, the other half edge (right end of FIGS. 1-2) from the outer peripheral surface of the other half part (right half part of FIGS. 1-2) of the said 1st cover element 30 (ie, the right half part of FIGS. 1-2), ie, the said curved part 34. In the state where the current collecting boat device 7 as shown in (1) of FIG. 2 is at the lowest height position during operation, the portion reaching the edge) does not protrude from the bulging portion 26 of the cover 20a. (Even if it protrudes, it does not disturb the air flow). In other words, the outer circumferential surface of the other half portion in the front-rear direction of the first cover element 30 is in the state shown in (1) of FIG. 2 (the state where the current collecting boat device 7 is at the lowest height position during operation). The bulging portion 26 has a shape that substantially follows the curved surface in the front-rear direction.

又、前記第二のカバー２９を構成する前記第二カバー素子３１は、上記透孔２３ａの周縁とこの周縁に対向する上記上枠６ａの外周面との開口部のうちで、運転時に上記集電舟装置７の上昇に伴って拡がる部分、即ち、図１及び図５にβで示す部分を、この部分の拡縮に拘らず塞ぐものである。言い換えれば、図２に示す様に、前記集電舟装置７をこの図２の（１）に示す運転時の最低高さ位置から、この図２の（６）に示す運転時の最高高さ位置にまで上昇させる際に、上記開口部のうちで拡がる部分（β部分）を、上記第二カバー素子３１により塞いでいる。本実施例の場合、この第二カバー素子３１は、前後方向に関する形状（側面から見た形状）を、中間部を頂部３６とした山状（略く字状）としており、上記上枠６ａの基端寄り部分（透孔２３ａの内面と対向する部分）の下半部に固定される。 Further, the second cover element 31 constituting the second cover 29 has the above-mentioned collection during operation in an opening portion between the peripheral edge of the through hole 23a and the outer peripheral surface of the upper frame 6a facing the peripheral edge. The portion that expands as the electric boat device 7 rises, that is, the portion indicated by β in FIGS. 1 and 5 is closed regardless of the expansion / contraction of this portion. In other words, as shown in FIG. 2, the current collecting boat device 7 is moved from the lowest height position during operation shown in (1) of FIG. 2 to the highest height during operation shown in (6) of FIG. When the position is raised to the position , a portion (β portion) that expands in the opening is closed by the second cover element 31. In the case of the present embodiment, the second cover element 31 has a shape (viewed from the side) in the front-rear direction as a mountain shape (substantially square shape) with the middle portion as the top portion 36, and the upper frame 6 a It is fixed to the lower half of the base end portion (the portion facing the inner surface of the through hole 23a).

又、上記第二カバー素子３１は、幅方向の断面を略Ｕ字状としており、上記上枠６ａに固定した状態でこの上枠６ａから離れる方向に突出した凸曲面状の曲面部３７と、この曲面部３７の幅方向両端からそれぞれ連続する状態で互いに平行に設けられた１対の側面部３８、３８とを有する。このうちの曲面部３７は、幅方向に関する断面形状を、上記上枠６ａの外周面及び後述する第三カバー素子３２の頂部４２に設けた円弧部４３とほぼ同じ形状（上枠６ａの外周面及び円弧部４３に沿った形状）としている。即ち、本実施例の場合には、上記曲面部３７の幅方向に関する曲率を、上記上枠６ａの外周面の曲率及び上記円弧部４３の曲率とほぼ同じとしている。又、上記第二カバー素子３１の幅方向に関する（内部も塞がれていると仮定した状態での）断面積を、前後方向中間部に設けた上記頂部３６で最大とすると共に、前後方向両端縁に向かう程徐々に小さくなる様にしている。   The second cover element 31 has a substantially U-shaped cross section in the width direction, and a convex curved surface portion 37 protruding in a direction away from the upper frame 6a while being fixed to the upper frame 6a, The curved surface portion 37 has a pair of side surface portions 38 and 38 provided in parallel to each other in a state of being continuous from both ends in the width direction. Among these, the curved surface portion 37 has a cross-sectional shape in the width direction substantially the same shape as the outer peripheral surface of the upper frame 6a and the arc portion 43 provided on the top portion 42 of the third cover element 32 described later (the outer peripheral surface of the upper frame 6a). And a shape along the arc portion 43). That is, in the present embodiment, the curvature of the curved surface portion 37 in the width direction is substantially the same as the curvature of the outer peripheral surface of the upper frame 6a and the curvature of the arc portion 43. In addition, the cross-sectional area in the width direction of the second cover element 31 (assuming that the inside is also closed) is maximized at the top portion 36 provided in the middle portion in the front-rear direction, and both ends in the front-rear direction It is designed to become smaller gradually toward the edge.

又、上記各側面部３８、３８は、上記上枠６ａの下半部にそれぞれねじ４０により固定した複数（図示の例の場合５個）の支持ブロック３９、３９を、幅方向両側から挟持した状態で、これら各支持ブロック３９、３９に別のねじ４１、４１により固定する。この様に上記各側面部３８、３８を上記各支持ブロック３９、３９に固定する事により、上記第二カバー素子３１を上記上枠６ａの下半部に固定する。この状態で、上記側面部３８、３８の外側面（互いに反対側の側面）同士の間隔は、上記上枠６ａの外径とほぼ同じとなる。そして、この上枠６ａの外周面と上記各側面部３８、３８の上端縁との段差部分にシリコン剤等のコーキング剤を埋め込んで、これら各外側面部３８、３８の上端縁と上記上枠６ａの外周面とを滑らかに連続させる。
Each of the side surface portions 38, 38 sandwiches a plurality of support blocks 39, 39 (five in the illustrated example) fixed to the lower half portion of the upper frame 6a from both sides in the width direction. In this state, the support blocks 39 and 39 are fixed to the support blocks 39 and 39 with different screws 41 and 41, respectively. In this way, by fixing the side portions 38, 38 to the support blocks 39, 39, the second cover element 31 is fixed to the lower half of the upper frame 6a. In this state, the distance between the outer side surfaces (side surfaces opposite to each other) of the side surface portions 38, 38 is substantially the same as the outer diameter of the upper frame 6a. Then, a caulking agent such as a silicon agent is embedded in a step portion between the outer peripheral surface of the upper frame 6a and the upper edge of each of the side surfaces 38, 38, and the upper edge of each of the outer surface portions 38, 38 and the upper frame 6a. Smoothly and continuously with the outer peripheral surface.

又、上記第二カバー素子３１は、図２の（１）に示す様に、上記集電舟装置７が運転時の最低高さ位置となった状態で、その前後方向他端縁（図１〜２の右端縁）が上記第三カバー素子３２の円弧部４３に近接対向する。この状態から、図２の（２）〜（６）に示す様に、上記集電舟装置７が運転時の最高高さ位置に向けて上昇すると、上記第二カバー素子３１が上記上枠６ａと共に、上方（図１〜２、５の上方）に変位すると同時に、前後方向に関して一方（図１〜２の右方）に変位する。そして、この様な変位に伴って、上記第二カバー素子３０の前後方向他半部（図１〜２の右半部）外周面、即ち、上記曲面部３７のうちの上記他端縁から上記頂部３６近傍に至る部分が、上記第三カバー素子３２の円弧部４３と常に同じ距離を保った状態で近接対向する。   Further, as shown in FIG. 2 (1), the second cover element 31 has its other edge in the front-rear direction (FIG. 1) in a state where the current collecting boat device 7 is at the lowest height position during operation. The right edge of ˜2 is in close proximity to the arc portion 43 of the third cover element 32. From this state, as shown in (2) to (6) of FIG. 2, when the current collecting boat device 7 is raised toward the maximum height position during operation, the second cover element 31 is moved to the upper frame 6a. At the same time, it is displaced upward (upward in FIGS. 1 and 2 and 5), and at the same time is displaced in one direction (rightward in FIGS. 1 and 2) in the front-rear direction. And with such a displacement, the other half part of the second cover element 30 in the front-rear direction (the right half part in FIGS. 1 and 2) outer peripheral surface, that is, from the other end edge of the curved surface part 37 The portion reaching the vicinity of the top portion 36 is close to and opposed to the circular arc portion 43 of the third cover element 32 with the same distance always maintained.

一方、上記図２の（６）に示す様に、上記集電舟装置７が運転時の最高高さ位置となった状態で、上記第二カバー素子３１の頂部３６近傍が、上記第三カバー素子３２の円弧部４３に近接対向する。この状態から、図２の（５）〜（１）に示す様に、上記集電舟装置７が運転時の最底高さ位置に向けて下降すると、上記第二カバー素子３１が上記上枠６ａと共に、下方（図１〜２、５の下方）に変位すると同時に、前後方向に関して他方に（図１〜２の左方）変位する。そして、この様な変位に伴って、上記第二カバー素子３１の前後方向他半部外周面（曲面部３７のうちの他端縁から頂部３６近傍に至る部分）が、上述した集電舟装置７の上昇時と同様に、上記第三カバー素子３２の円弧部４３と常に同じ距離を保った状態で近接対向する。   On the other hand, as shown in FIG. 2 (6), in the state where the current collecting boat device 7 is at the highest height position during operation, the vicinity of the top 36 of the second cover element 31 is the third cover. It faces the arc portion 43 of the element 32 in close proximity. From this state, as shown in (5) to (1) of FIG. 2, when the current collecting boat device 7 is lowered toward the lowest position during operation, the second cover element 31 is moved to the upper frame. 6a is displaced downward (downward in FIGS. 1 and 2 and 5), and at the same time is displaced in the other direction (leftward in FIGS. 1 and 2). And with such a displacement, the front-rear direction other half outer peripheral surface of the second cover element 31 (the portion of the curved surface portion 37 from the other end edge to the vicinity of the top portion 36) is the above-described current collecting boat device. As in the case of the ascent of 7, the arcuate portion 43 of the third cover element 32 is in close proximity to each other with the same distance maintained.

本実施例の場合、この様に第二カバー素子３１が上枠６ａと共に変位しても、この第二カバー素子３１の前後方向片半部外周面が上記円弧部４３に、常に同じ距離を保った状態で近接対向する。言い換えれば、この様に第二カバー素子３１の前後方向片半部が上記円弧部４３に常に同じ距離を保った状態で近接対向する様に、この第二カバー素子３１の前後方向片半部の断面形状を規制している。そして、この様に規制する事で、前記開口部のうちの図１及び図５にβで示す部分を、この開口部の拡縮に拘らず塞いでいる。尚、上記第二カバー素子３１の前後方向片半部（図１〜２の左半部）外周面、即ち上記曲面部３７のうちの上記頂部３６から一端縁（図１〜２の左端縁）に至る部分の形状は、後述する様なパンタグラフ枠２２ａを畳んだ状態で、前記下枠４ａと干渉しない様に規制する。   In the case of the present embodiment, even when the second cover element 31 is displaced together with the upper frame 6a in this way, the outer circumferential surface of the half half of the front and rear direction of the second cover element 31 always maintains the same distance in the arc portion 43. In close proximity. In other words, the front-rear direction half of the second cover element 31 is close to and opposed to the arcuate part 43 in the state where the same distance is always maintained in this manner. The cross-sectional shape is regulated. And by restrict | limiting in this way, the part shown by (beta) in FIG.1 and FIG.5 of the said opening part is plugged up irrespective of expansion / contraction of this opening part. In addition, one end edge (the left end edge of FIGS. 1-2) from the top part 36 of the outer peripheral surface of the front-back direction half part (left half part of FIGS. 1-2) of the said 2nd cover element 31, ie, the said curved-surface part 37, is. The shape of the portion extending to is restricted so as not to interfere with the lower frame 4a in a state in which a pantograph frame 22a as described later is folded.

又、前記第二のカバー２９を構成する前記第三カバー素子３２は、上記透孔２３ａの周縁とこの周縁に対向する上記上枠６ａの外周面との開口部のうちで、上記パンタグラフ枠２２ａを畳んだ状態から起立させて前記集電舟装置７を運転時の最低高さ位置にまで上昇させる際に拡がる部分、即ち、図１及び図５にγで示す部分を、上記パンタグラフ枠２２ａが起立している間塞ぐものである。本実施例の場合、この第三カバー素子３２は、前後方向に関する形状（側面から見た形状）を略三角形状としており、１対の側面部４４、４４と、これら各側面部４４、４４の前後方向他端縁（図１〜２の右端縁）同士を連結する連結部４５とを備える。そして、このうちの各側面部４４、４４の前後方向片端部（図１〜２の左端部）を、前記台枠２ｂ或いはカバー２０ａ等の固定の部分に固定した１対のブラケット４６、４６により枢支している。   The third cover element 32 constituting the second cover 29 has the pantograph frame 22a in the opening between the peripheral edge of the through hole 23a and the outer peripheral surface of the upper frame 6a facing the peripheral edge. The pantograph frame 22a is a part that expands when the current collecting boat device 7 is raised to the lowest height position during operation by standing up from the folded state, that is, the part indicated by γ in FIGS. It closes while standing up. In the case of the present embodiment, the third cover element 32 has a substantially triangular shape in the front-rear direction (the shape seen from the side surface), and a pair of side surface portions 44, 44 and each of the side surface portions 44, 44. And a connecting portion 45 that connects the other ends in the front-rear direction (the right end edge in FIGS. 1 and 2). Then, a pair of brackets 46, 46 that fix one end portion in the front-rear direction (left end portion in FIGS. 1 and 2) of each of the side surface portions 44, 44 to a fixed portion such as the frame 2b or the cover 20a. It is pivotally supported.

即ち、上記各側面部４４、４４の片端部にそれぞれ枢支部材４７、４７を固定すると共に、これら各枢支部材４７、４７に固設した車両の幅方向に突出する横軸４８、４８を、上記各ブラケット４６、４６により枢支する事で、上記第三カバー素子３２をこれら各横軸４８、４８を中心とした揺動変位自在に支持している。そして、上記各枢支部材４７、４７に設けた突出部４９、４９と上記台枠２ｂに固定した部材との間に１対の引っ張りばね５０、５０を掛け渡す事で、上記第三カバー素子３２の頂部４２に設けた円弧部４３を上記上枠６ａの外周面に近付かせる方向（図８〜９の反時計方向）の弾性力を付与している。尚、上記各引っ張りばね５０、５０の弾性力に基づく上記第三カバー素子３２の揺動変位（図８〜９の反時計方向の変位）は、上記各枢支部材４７、４７に設けたストッパ部５１、５１が上記各ブラケット４６、４６の一部に当接する事で制限される。又、上記第三カバー素子３２の頂部４２に設けた上記円弧部４３の形状は、上記上枠６ａの外周面及び前記第二カバー素子３１の頂部３６に設けた曲面部３７とほぼ同じ形状（上枠６ａの外周面及び曲面部３７に沿った形状）としている。即ち、本実施例の場合には、上記円弧部４３の幅方向に関する曲率を、上記上枠６ａの外周面の曲率及び曲面部３７の曲率とほぼ同じとしている。   That is, the pivot members 47 and 47 are fixed to one end portions of the side surfaces 44 and 44, respectively, and the horizontal shafts 48 and 48 projecting in the width direction of the vehicle fixed to the pivot members 47 and 47 are provided. The third cover element 32 is supported by the brackets 46 and 46 so as to be swingable and displaceable about the horizontal shafts 48 and 48, respectively. Then, a pair of tension springs 50, 50 are spanned between the protrusions 49, 49 provided on the respective pivot members 47, 47 and the members fixed to the frame 2 b, so that the third cover element An elastic force is applied in a direction (counterclockwise in FIGS. 8 to 9) in which the circular arc portion 43 provided on the top portion 42 of the 32 approaches the outer peripheral surface of the upper frame 6a. A swing displacement of the third cover element 32 (counterclockwise displacement in FIGS. 8 to 9) based on the elastic force of each of the tension springs 50, 50 is a stopper provided on each of the pivot members 47, 47. The portions 51, 51 are restricted by contacting a part of the brackets 46, 46. Further, the shape of the arc portion 43 provided on the top portion 42 of the third cover element 32 is substantially the same shape as the outer peripheral surface of the upper frame 6 a and the curved surface portion 37 provided on the top portion 36 of the second cover element 31 ( The shape along the outer peripheral surface of the upper frame 6a and the curved surface portion 37). That is, in the present embodiment, the curvature in the width direction of the arc portion 43 is substantially the same as the curvature of the outer peripheral surface of the upper frame 6a and the curvature of the curved surface portion 37.

上述の様に構成する第三カバー素子３２は、上記パンタグラフ枠２２ａを畳んだ状態から起立させると、図１〜２及び図９の鎖線で示す位置から実線で示す位置へ、即ち、上記各枢支部材４７、４７に設けたストッパ部５１、５１が上記各ブラケット４６、４６の一部に当接するまで、上記各引っ張りばね５０、５０の弾性力に基づいて上昇する。この様なパンタグラフ枠２２ａが起立した状態では、上記第三カバー素子３２を構成する上記連結部４５が前記開口部のうちの図１及び図５にγで示す部分を常に塞いでいる。又、これと共に、この第三カバー素子３２の頂部４２に設けた円弧部４３が、前記第二カバー素子３１の外周面に近接対向する。尚、これら円弧部４３と第二カバー素子３１の外周面とが、前記集電舟装置７の運転時の昇降に拘わらず、常に同じ距離を保った状態で近接対向する作用は、前述した通りである。   When the third cover element 32 configured as described above is erected from the state in which the pantograph frame 22a is folded, the third cover element 32 is moved from the position indicated by the chain line in FIGS. The stoppers 51, 51 provided on the support members 47, 47 are raised based on the elastic force of the tension springs 50, 50 until the stoppers 51, 51 come into contact with a part of the brackets 46, 46. In such a state that the pantograph frame 22a stands up, the connecting portion 45 constituting the third cover element 32 always blocks the portion indicated by γ in FIGS. 1 and 5 of the opening. At the same time, an arc 43 provided on the top 42 of the third cover element 32 is in close proximity to the outer peripheral surface of the second cover element 31. Note that, as described above, the arc portion 43 and the outer peripheral surface of the second cover element 31 face each other while maintaining the same distance regardless of the elevation during operation of the current collector boat 7. It is.

又、上記パンタグラフ枠２２ａを起立した状態から畳むと、上記第三カバー素子３２は上記パンタグラフ枠２２ａ（上枠６ａ）の外周面により下方に押圧される事で、上記各引っ張りばね５０、５０の弾力に拘わらず、上記図１〜２及び図９の実線で示す位置から鎖線で示す位置へ、上記パンタグラフ枠２２ａと共に変位（揺動）する。この為に、上記各引っ張りばね５０、５０の弾力は、前記ばね８の弾力に比べて、遥かに小さくしている。又、上記開口部を塞ぐ上記連結部４５は、上記パンタグラフ枠２２ａを起立させた状態で、前記カバー２０ａの膨出部２６から前後方向に突出しない様に（突出したとしても空気の流れを乱さない程度と）する。言い換えれば、上記連結部４５の外側面は、上記図２の（１）〜（６）に示すパンタグラフ枠２２ａの起立状態で、上記膨出部２６の前後方向に関する曲面にほぼ沿う様にする。   When the pantograph frame 22a is folded from an upright state, the third cover element 32 is pressed downward by the outer peripheral surface of the pantograph frame 22a (upper frame 6a), so that the tension springs 50, 50 Regardless of elasticity, the pantograph frame 22a is displaced (swinged) from the position shown by the solid line in FIGS. 1-2 and 9 to the position shown by the chain line. For this reason, the elasticity of each of the tension springs 50, 50 is much smaller than the elasticity of the spring 8. Further, the connecting portion 45 that closes the opening portion does not protrude in the front-rear direction from the bulging portion 26 of the cover 20a in a state where the pantograph frame 22a is raised (even if protruding, the air flow is disturbed). To a certain extent). In other words, the outer surface of the connecting portion 45 is made to substantially follow the curved surface in the front-rear direction of the bulging portion 26 in the standing state of the pantograph frame 22a shown in (1) to (6) of FIG.

上述の様に構成する本実施例のパンタグラフ装置１ｂの場合には、上記パンタグラフ枠２２ａの上端部である前記上枠６ａの上半部と、集電舟装置７とを除く部分、即ち、前記台枠２ｂ、この台枠２ｂの上面に設置したばね８（図１１〜１２参照）等の、上記パンタグラフ枠２２ａを起倒させる為の機構、及び、このパンタグラフ枠２２ａの下部が、上記カバー２０ａにより覆われている。従って、鉄道車両の走行時にも、上記パンタグラフ枠２２ａの上端部と上記集電舟装置７とを除く部分に風が勢い良く当たる事がない。又、上記カバー２０ａに設けた透孔２３ａの内面と上記パンタグラフ枠２２ａ（上枠６ａ）の外周面との開口部を、前述した様な第二のカバー２９により塞ぐ為、この開口部に空気が流れ込む事が無くなり、この様な空気の流れに基づく騒音を防止できる。この結果、高速走行時にも、パンタグラフ装置部分で発生する気流騒音を、十分に低く抑える事ができる。しかも、上記第二のカバー２９を、前述した様な第一、第二、第三カバー素子３０〜３２により構成する為、上記開口部のうちの上記パンタグラフ枠２２ａの変位に基づいて拡縮する部分を、上記各カバー素子３０〜３２により効率良く塞ぐ事ができる。   In the case of the pantograph device 1b of the present embodiment configured as described above, a portion excluding the upper half portion of the upper frame 6a that is the upper end portion of the pantograph frame 22a and the current collector boat device 7, that is, the A mechanism for raising and lowering the pantograph frame 22a, such as a frame 2b, a spring 8 (see FIGS. 11 to 12) installed on the upper surface of the frame 2b, and a lower part of the pantograph frame 22a are connected to the cover 20a. Covered by. Therefore, even when the railway vehicle is traveling, the wind does not strike the portion excluding the upper end of the pantograph frame 22a and the current collecting boat device 7 vigorously. Further, the opening between the inner surface of the through hole 23a provided in the cover 20a and the outer peripheral surface of the pantograph frame 22a (upper frame 6a) is closed by the second cover 29 as described above. Can be prevented, and noise based on such air flow can be prevented. As a result, airflow noise generated in the pantograph device portion can be sufficiently suppressed even during high-speed traveling. Moreover, since the second cover 29 is constituted by the first, second, and third cover elements 30 to 32 as described above, a portion of the opening that expands or contracts based on the displacement of the pantograph frame 22a. Can be efficiently blocked by the cover elements 30 to 32 described above.

尚、本実施例の場合、円孔２３ａを構成する各円弧部２７ａ、２７ｂ、第一カバー素子３０の曲面部３４、第二カバー素子３１の曲面部３７、及び第三カバー素子３２の円弧部４３の形状を半円形とすると共に、この部分の曲率を上記パンタグラフ枠２２ａ（上枠６ａ）の外周面の曲率とほぼ同じとしている。但し、本発明を実施する場合の構造は、この様な構造に限定するものではない。例えば、高速運転時に発生する気流騒音を低減できるのであれば、上記各円弧部２７ａ、２７ｂ、４３及び曲面部３４、３７を、異なる曲率を有する円弧を組み合わせて成る複合円弧状のものや、角部を滑らかなに連続させた矩形状のものとしても良い。但し、互いに近接対向する円弧部２７ａ、２７ｂ、４３と曲面部３４、３７とはほぼ同じ形状とし、これら近接対向する部分の隙間が大きくならない様にする事は、本実施例の場合と同様である。又、本発明と前述の図１７〜１８に示した先発明の構造とを組み合わせて実施する事は、碍子１７、１７部分での気流騒音も十分に低減できる事から、特に好ましい。この場合に、碍子１７、１７の側方も、別のカバーで覆う事もできる。   In the case of the present embodiment, the arc portions 27a and 27b constituting the circular hole 23a, the curved portion 34 of the first cover element 30, the curved portion 37 of the second cover element 31, and the arc portion of the third cover element 32 are used. The shape of 43 is semicircular, and the curvature of this portion is substantially the same as the curvature of the outer peripheral surface of the pantograph frame 22a (upper frame 6a). However, the structure for carrying out the present invention is not limited to such a structure. For example, if the airflow noise generated during high-speed operation can be reduced, the arc portions 27a, 27b, 43 and the curved surface portions 34, 37 may be combined arcuate shapes formed by combining arcs having different curvatures, It is good also as a rectangular thing which continued the part smoothly. However, the arc portions 27a, 27b, 43 and the curved surface portions 34, 37 that face each other in the vicinity are substantially the same shape, and the gap between these portions that face each other does not become large as in the case of this embodiment. is there. In addition, it is particularly preferable to combine the present invention with the structure of the previous invention shown in FIGS. 17 to 18 because airflow noise in the insulators 17 and 17 can be sufficiently reduced. In this case, the sides of the insulators 17 and 17 can be covered with another cover.

本発明の実施例を、一部を切断して示す側面図。The side view which cuts and shows the Example of this invention partially. 集電舟装置の高さをそれぞれ変化させた状態で示す、図１と同様の側面図。The side view similar to FIG. 1 shown in the state which each changed the height of the current collector boat apparatus. 上枠を取り出して示す図で、（Ａ）は平面図、（Ｂ）は第一、第二カバー素子を取り付けた状態の側面図。It is a figure which takes out and shows an upper frame, (A) is a top view, (B) is a side view of the state which attached the 1st and 2nd cover element. 図３のＡ−Ａ断面図。AA sectional drawing of FIG. 一部を切断して示す、図１のＢ矢視図。The arrow B view of FIG. 1 which cuts and shows a part. 第三カバー素子の正面図。The front view of a 3rd cover element. 同じく平面図。FIG. 同じく側面図。Similarly side view. 図７のＣ−Ｃ断面図。CC sectional drawing of FIG. 屋根上への取付け状態を示す略側面図。The schematic side view which shows the attachment state on a roof. 従来のパンタグラフ装置の１例を示す側面図。The side view which shows one example of the conventional pantograph apparatus. 同じく平面図。FIG. 図１１の右方から見た図。The figure seen from the right side of FIG. 要部を取り出して示す側面図。The side view which takes out and shows the principal part. 同じく略側面図。Similarly a schematic side view. 屋根上への取付け状態を示す略側面図。The schematic side view which shows the attachment state on a roof. 先発明の斜視図。The perspective view of a prior invention. 同じく側面図。Similarly side view.

符号の説明Explanation of symbols

１、１ａ、１ｂ パンタグラフ装置
２、２ａ、２ｂ 台枠
３、３ａ 揺動支持軸
４、４ａ 下枠
５、５ａ 連結軸
６、６ａ 上枠
７ 集電舟装置
８ ばね
９ 摺り板
１０、１０ａ 釣り合い腕
１１、１１ａ 釣り合い軸
１２、１２ａ 釣り合い棒
１３、１３ａ 下部釣り合い軸
１４ リンク腕
１５ ロッド
１６ 屋根面
１７ 碍子
１８ 防風板
１９ 覆い部材
２０、２０ａ カバー
２１ａ、２１ｂ 端部カバー
２２、２２ａ パンタフラフ枠
２３、２３ａ 透孔
２４ 天板部
２５ 側板部
２６ 膨出部
２７ａ、２７ｂ 円弧部
２８ 直線部
２９ 第二のカバー
３０ 第一カバー素子
３１ 第二カバー素子
３２ 第三カバー素子
３３ 頂部
３４ 曲面部
３５ 側面部
３６ 頂部
３７ 曲面部
３８ 側面部
３９ 支持ブロック
４０ ねじ
４１ ねじ
４２ 頂部
４３ 円弧部
４４ 側面部
４５ 連結部
４６ ブラケット
４７ 枢支部材
４８ 横軸
４９ 突出部
５０ 引っ張りばね
５１ ストッパ部 DESCRIPTION OF SYMBOLS 1, 1a, 1b Pantograph device 2, 2a, 2b Underframe 3, 3a Oscillation support shaft 4, 4a Lower frame 5, 5a Connection shaft 6, 6a Upper frame 7 Current collector boat device 8 Spring 9 Sliding plate 10, 10a Balance Arm 11, 11a Balance shaft 12, 12a Balance rod 13, 13a Lower balance shaft 14 Link arm 15 Rod 16 Roof surface 17 Insulator 18 Windproof plate 19 Cover member 20, 20a Cover 21a, 21b End cover 22, 22a Pantaffle frame 23, 23a Through-hole 24 Top plate part 25 Side plate part 26 Swelling part 27a, 27b Arc part 28 Linear part 29 Second cover 30 First cover element 31 Second cover element 32 Third cover element 33 Top part 34 Curved part 35 Side part 36 Top portion 37 Curved surface portion 38 Side surface portion 39 Support block 40 Screw 41 Screw 42 Top portion 43 Arc portion 44 Surface 45 connecting portion 46 the bracket 47 pivot member 48 horizontal axis 49 projection 50 tension spring 51 stopper portion

Claims (4)

鉄道車両の屋根面上に絶縁支持される台枠と、一部に上下両面同士を連通させる透孔を有し、この台枠の上方に設けられた、絶縁材製のカバーと、上記台枠の上面に起倒自在に設けられ、上記透孔に挿通した状態でその上部をこのカバーの上方に突出させたパンタグラフ枠と、このパンタグラフ枠の上端部に支持された集電舟装置とを備え、上記透孔は、上記パンタグラフ枠の変位を許容すべくこのパンタグラフ枠の変位方向に長い形状としており、上記透孔の周縁とこの周縁に対向する上記パンタグラフ枠の外周面との開口部に、上記鉄道車両の運転時に於けるこのパンタグラフ枠の変位に拘らずこの開口部を塞ぐ第二のカバーを設けたパンタグラフ装置。   A base frame that is insulated and supported on the roof surface of the railway vehicle, and a cover made of an insulating material that has a through-hole that communicates the upper and lower surfaces in part, and is provided above the base frame, and the base frame A pantograph frame provided on the upper surface of the pantograph so that the upper part protrudes above the cover in a state of being inserted into the through hole, and a current collecting boat device supported by the upper end of the pantograph frame. The through hole has a shape that is long in the displacement direction of the pantograph frame so as to allow the displacement of the pantograph frame, and at the opening between the peripheral edge of the through hole and the outer peripheral surface of the pantograph frame facing the peripheral edge, A pantograph device provided with a second cover that closes the opening regardless of the displacement of the pantograph frame during operation of the railway vehicle. 第二のカバーは、透孔の周縁とこの周縁に対向するパンタグラフ枠の外周面との開口部のうちで、運転時に集電舟装置の下降に伴って拡がる部分を、この部分の拡縮に拘らず塞ぐ第一カバー素子と、同じく上昇に伴って拡がる部分を、この部分の拡縮に拘らず塞ぐ第二カバー素子とを備えたものである、請求項１に記載したパンタグラフ装置。   The second cover is a part of the opening between the periphery of the through-hole and the outer peripheral surface of the pantograph frame facing the periphery, and the portion that expands as the current collector boat descends during operation is related to the expansion / contraction of this portion. The pantograph device according to claim 1, further comprising a first cover element that closes and a second cover element that closes a portion that expands as it rises regardless of expansion or contraction of the portion. 第二のカバーは、第一、第二カバー素子と共に、第三カバー素子を備え、このうちの第一カバー素子は、透孔の周縁とこの周縁に対向するパンタグラフ枠の外周面との開口部のうちで、集電舟装置を運転時の最高高さ位置から運転時の最低高さ位置にまで下降させる際に拡がる部分を、この部分の拡縮に拘らず塞ぐものであり、上記第二カバー素子は、同じく上記集電舟装置を運転時の最低高さ位置から運転時の最高高さに位置にまで上昇させる際に拡がる部分を、この部分の拡縮に拘らず塞ぐものであり、上記第三カバー素子は、同じく上記パンタグラフ枠を畳んだ状態から起立させて上記集電舟装置を運転時の最低高さ位置にまで上昇させる際に拡がる部分を、上記パンタグラフ枠が起立している間中塞ぐものである、請求項２に記載したパンタグラフ装置。   The second cover includes a first cover element and a third cover element together with the first and second cover elements, and the first cover element includes an opening between the periphery of the through hole and the outer peripheral surface of the pantograph frame facing the periphery. Among these, the second cover covers a portion that expands when the current collecting boat device is lowered from the highest height position during operation to the lowest height position during operation, regardless of the expansion / contraction of this portion. Similarly, the element closes the portion that expands when the current collecting boat device is raised from the lowest height position during operation to the highest height during operation, regardless of the size of the portion. The three-cover element is also raised while the pantograph frame is raised, and the part that expands when the current collecting boat device is raised to the lowest height position during operation is raised while the pantograph frame is raised. 3. The device according to claim 2, which is a plug. Pantograph equipment. 台枠上でパンタグラフ枠を起倒させる為に、このパンタグラフ枠を、この台枠上に設けられた第一の横軸によりその基端部を揺動自在に支持された下枠と、この下枠の先端部にこの第一の横軸と平行に設けられた第二の横軸によりその基端部を揺動自在に支持された上枠と、この上枠の基端部から突出する状態で設けられてこの上枠に対しその基端部を結合固定され、この上枠と共に上記第二の横軸を中心として揺動する釣り合い腕と、この釣り合い腕の先端部に上記第一、第二の横軸と平行に設けられた第三の横軸によりその先端部を揺動自在に支持され、これら第一〜第三の横軸と平行に設けられた第四の横軸によりその基端部を上記台枠に対し揺動自在に支持された釣り合い棒とから構成すると共に、上記下枠の長さを、上記上枠の長さの１／６〜１／３倍としており、上記上枠をカバーに設けた透孔を通じてこのカバーの上方に突出させて、この上枠の上端部に集電舟装置を支持している、請求項１〜３の何れかに記載したパンタグラフ装置。
In order to raise and lower the pantograph frame on the underframe, the pantograph frame is provided with a lower frame whose base end is swingably supported by a first horizontal axis provided on the underframe, and a lower frame. An upper frame whose base end is swingably supported by a second horizontal axis provided in parallel to the first horizontal axis at the front end of the frame, and a state protruding from the base end of the upper frame A balance arm which is fixedly coupled to the upper frame and swings about the second horizontal axis together with the upper frame, and the first and first The tip is supported in a swingable manner by a third horizontal axis provided in parallel with the second horizontal axis, and the base is provided by a fourth horizontal axis provided in parallel with the first to third horizontal axes. The end portion is composed of a balance rod that is swingably supported with respect to the base frame, and the length of the lower frame is set to the length of the upper frame. 1/6 to 1/3 times the upper frame, the upper frame is projected above the cover through a through hole provided in the cover, and the current collecting boat device is supported at the upper end of the upper frame. Item 4. The pantograph device according to any one of Items 1 to 3.

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