PROBLEM TO BE SOLVED: To provide a maintenance window opening and closing mechanism capable of opening and closing an opening and closing cover safely and ensuring a working space.SOLUTION: The present invention includes an opening and closing cover 12, a link mechanism 20A connecting the opening and closing cover 12 and a counterweight 10, a spring 40, first and second fixed support portions 25, 26 arranged so that links 21, 22 are rotatable and horizontally arranged with respect to the counterweight 10, and first and second movable support portions 27, 28 arranged so that the links 21, 22 are rotatable and horizontally arranged with respect to the opening and closing cover 12. The first fixed support portion 25 and the first movable support portion 27, and the second fixed support portion 26 and the second movable support portion 28 are connected by the links 21, 22. The distance between the fixed support portions 25, 26 is smaller than the distance between the movable support portions 27, 28. The spring 40 is supported by a second link 22 at a position of the second fixed support portion 26, or at a position which becomes an inner side of a construction machine when closed by the opening and closing cover 12 and at a position between the center and the second fixed support portion 26 and between the first movable support portion 27 and the second movable support portion 28.SELECTED DRAWING: Figure 2

    【課題】安全に開閉カバーを開閉でき、作業スペースを確保できる整備用窓口開閉機構を提供する。【解決手段】開閉カバー12、開閉カバー12とカウンターウエイト10を連結するリンク機構20A、スプリング40、リンク21,22をカウンターウエイト10に対し回転可能かつ水平に並べて配された第1,2固定支持部25,26、リンク21,22を開閉カバー12に対し回転可能かつ水平に並べて配された第1,2移動支持部27,28を備え、第1固定支持部25と第1移動支持部27、第2固定支持部26と第2移動支持部28とがリンク21,22で連結され、固定支持部25,26の間隔が、移動支持部27,28の間隔より小さく、スプリング40を第2固定支持部26の位置又は中央と第2固定支持部26の間と第1移動支持部27と第2移動支持部28との間であり開閉カバー12で閉鎖したときに建設機械の内部側の位置とで第2リンク22に支持する。【選択図】図2


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    Title :

    MAINTENANCE WINDOW OPENING AND CLOSING MECHANISM


    Additional title:

    整備用窓口開閉機構


    Contributors:

    Publication date :

    2018-09-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    E02F Baggern , DREDGING / B62D MOTOR VEHICLES , Motorfahrzeuge



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