To provide a crane overwinding prevention device that improves safety compared to conventional devices, reduces installation costs, and reliably prevents a crane rope from overwinding, as well as doubly prevents overwinding by providing the overwinding prevention device according to the present invention in addition to an overwinding prevention device that detects slack in the rope to prevent overwinding.SOLUTION: The overwinding prevention device has a boom tip 2 of a crane and a lifting fixture 4 suspended from the tip via a hoisting rope 3. An unapproachable interval H during rope hoisting is set between a lower surface of the boom tip 2 and an upper surface of the lifting fixture 4. A sensor 6 that emits a detection signal and on which the upper surface of the lifting fixture 4 abuts when the upper surface of the lifting fixture 4 enters into the unapproachable interval H during hoisting of the hoisting rope 3, is provided in the unapproachable interval H.SELECTED DRAWING: Figure 1

    【課題】本発明は、従来に比較してより安全性が向上し、しかも設置コストを安価に出来、さらには確実にクレーンロープの巻過を防止できる巻過防止装置を提供でき、また、ロープの緩みを検出して巻過防止を行う巻過防止装置に加えて本発明による巻過防止装置を設けることにより、二重に巻過を防止できるクレーンの巻過防止装置を提供する。【解決手段】本発明は、クレーンのブーム先端部2と該先端部から巻き上げロープ3を介して吊下された吊り具4とを有し、前記ブーム先端部2下面と前記吊り具4上面の間には、ロープ巻き上げ時の接近不可間隔Hが設定されてなり、前記巻き上げロープ3の巻き上げ時に、前記吊り具4上面が前記接近不可間隔H内に進入したとき、前記吊り具4の上面が当接して検知信号を発するセンサ6を前記接近不可間隔H内に設けたことを特徴とする。【選択図】図1


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    Title :

    CRANE OVERWINDING PREVENTION DEVICE


    Additional title:

    クレーンの巻過防止装置


    Contributors:

    Publication date :

    2023-10-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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