PROBLEM TO BE SOLVED: To provide a crane truck capable of performing detection of over-winding and transmission/reception of information with a single wire, and also to prevent the emission of radio waves in advance.SOLUTION: The crane truck comprises a traveling body 20, a pivoting body 40, a boom 50, and a signal line SL. The traveling body 20 and the pivoting body 40 have a battery 24 and a first control circuit 60. The boom 50 has an over-wind switch SW and a second control circuit 70. The first control circuit 60 has an electromagnetic relay 62, a stop circuit 64, and a first modulation/demodulation circuit 66. The second control circuit 70 has a second modulation/demodulation circuit 76 and a second power supply circuit 71. When the over-wind switch SW is in the open state, the electromagnetic relay 62 is closed. When the electromagnetic relay 62 is closed, the stop circuit 64 stops driving of the first modulation/demodulation circuit 66. When the over-wind switch SW is in the open state, the supply of the DC voltage from the second power supply circuit 71 to the second modulation/demodulation circuit 76 is stopped. As a result, emission of radio waves is prevented in advance.SELECTED DRAWING: Figure 4

    【課題】過巻の検知と情報の送受信とを単線にて行うことができ、かつ、電波の放出を未然に防止する。【解決手段】クレーン車は、走行体20と、旋回体40と、ブーム50と、信号線SLとを備える。走行体20及び旋回体40は、バッテリ24及び第1制御回路60を有する。ブーム50は、過巻スイッチSW及び第2制御回路70を有する。第1制御回路60は、電磁リレー62、停止回路64、及び第1変調/復調回路66を有する第2制御回路70は、第2変調/復調回路76、及び第2電源回路71を有する。過巻スイッチSWが開状態となると、電磁リレー62が閉状態になる。電磁リレー62が閉状態になると、停止回路64が第1変調/復調回路66の駆動を停止する。また、過巻スイッチSWが開状態になると、第2電源回路71から第2変調/復調回路76への直流電圧の供給が停止される。その結果、電波の放出が未然に防止される。【選択図】図4


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    Title :

    CRANE TRUCK


    Additional title:

    クレーン車


    Contributors:

    Publication date :

    2018-03-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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