PROBLEM TO BE SOLVED: To solve the problem in which it is necessary to replace a rotary joint with another rotary joint corresponding to added electric signal wires when addition of the electric signal wires between a revolving superstructure and an under-carriage occurs.SOLUTION: A rotary joint 30 has four connection wires A through D. On the other hand, it is assumed that a lower weight detection switch 35 other than a side frame expansion remote control 33 and a side frame cylinder expansion device 34 is added as an additional function to an under-carriage 10. On this account, normally, it is necessary to replace the rotary joint 30 with a rotary joint having six connection wires. However, by switching electric signal wires of an upper changer 31 and a lower changer 32, the rotary joint 30 having the four connection wires A through D can be used.SELECTED DRAWING: Figure 3

    【課題】上部旋回体と下部走行体との間の電気信号線に追加が生じた場合、追加した電気信号線に対応した回転継手へ交換する必要があった。【解決手段】回転継手30は、4本の接続線A〜Dを有する。一方、下部走行体10には、サイドフレーム伸縮リモコン33、サイドフレームシリンダ伸縮装置34の他に、ロアウエイト検出スイッチ35が追加機能して加えられたものとする。このため、通常であれば6本の接続線を有する回転継手に交換する必要があるが、上部切換器31及び下部切換器32の電気信号線を切り替えることにより、4本の接続線A〜Dを有する回転継手30を用いることができる。【選択図】図3


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    Title :

    SIGNAL WIRE CHANGEOVER DEVICE FOR WORK MACHINE AND WORK MACHINE


    Additional title:

    作業機械の信号線切換装置及び作業機械


    Contributors:

    Publication date :

    2017-06-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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