PROBLEM TO BE SOLVED: To provide a bridge type crane whose hoisting capability can be sufficiently utilized.SOLUTION: In a state where a main trolley 11 and an auxiliary trolley 12 are arranged to be positioned side by side in a longitudinal direction, a fourth wire rope 18D is taken up from a position corresponding to a wire rope in which loosening begins to occur, of first, second and third wire ropes 18A, 18B and 18C, toward a position corresponding to a wire rope in which excessive tension begins to occur. This can eliminate a state where the loosening and the excessive tension begin to occur in the first, second and third wire ropes 18A, 18B and 18C, so that the auxiliary trolley 12 can support nearly one third of a load of an object L to be hoisted and support a load close to a limit of a load which the trolley can hoist. Thus a hoisting capability of a bridge type crane 1 can be sufficiently utilized.SELECTED DRAWING: Figure 5

    【課題】吊り上げ能力を十分に活用できる橋形クレーンを提供する。【解決手段】主トロリ11及び補トロリ12が前後方向に互いに並ぶ位置に配置された状態において、第1、第2及び第3のワイヤーロープ18A,18B,18Cの内の弛みが生じようとするワイヤーロープに対応した位置から、過大な張力が発生しようとするワイヤーロープに対応した位置へ向かって、第4のワイヤーロープ18Dが巻き取られる。これにより、第1、第2及び第3のワイヤーロープ18A,18B,18Cに弛み及び過大な張力が発生しようとする状態が解消するため、補トロリ12は、吊り上げ対象物Lの荷重の略3分の1を支持することができ、その吊り上げ可能な荷重の限度に近い荷重を支持することが可能となる。以上により、橋形クレーン1の吊り上げ能力を十分に活用できる。【選択図】図5


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    Title :

    BRIDGE TYPE CRANE


    Additional title:

    橋形クレーン


    Contributors:

    Publication date :

    2017-04-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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