PROBLEM TO BE SOLVED: To display a normal suspended load value on a load meter in response to high/low-speed switching of a high/low speed hydraulic motor even when the load meter in use is inexpensive.SOLUTION: A suspended load value display device for a crane work machine comprises: a load meter 40 which displays driving oil pressure of a wind-up oil passage 24 of a high/low-speed hydraulic motor 23 as a load corresponding value of a suspended load; a first oil passage 41 which makes the driving oil pressure of the wind-up oil passage act directly on the load meter; a second oil passage 42 which makes the oil pressure act directly on the load meter; selection means 43 of selectively connecting the first oil passage and second oil passage to the wind-up oil passage; and pressure conversion means 44 provided in the second oil passage so as to raise the driving oil pressure of the wind-up oil passage in low-speed driving up to pressure corresponding to driving oil pressure in high-speed driving at a ratio corresponding to a ratio of oil absorption amounts per unit rotation in low-speed driving and high-speed driving and then apply the oil pressure to the load meter. The selection means is enabled to perform switching to the first oil passage side in the high-speed driving and to the second oil passage side in the low-speed driving.SELECTED DRAWING: Figure 2

    【課題】安価な荷重計を使用したものであっても、高・低速油圧モータの高・低速切換えに対応して該荷重計に正常な吊荷重値を表示させ得るようにすること。【解決手段】高・低速油圧モータ23の巻上油路24の駆動油圧を吊荷の荷重対応値として表示する荷重計40と、巻上油路の駆動油圧を荷重計に直接作用させる第1油路41と、荷重計に油圧を間接的に作用させる第2油路42と、第1油路と第2油路とを巻上油路に対して選択的に接続させる選択手段43と、第2油路に設けられていて低速駆動と高速駆動における単位回転当たりの吸収油量比に対応した比率で低速駆動時における上記巻上油路の駆動油圧を高速駆動時における駆動油圧に相当する圧力まで増圧して荷重計に供給する圧力変換手段44とを備え、選択手段は、上記高速駆動時には第1油路側に切換える一方、上記低速駆動時には第2油路側に切換えるように構成していることで、上記課題を達成し得るようにした。【選択図】 図2


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    Titel :

    SUSPENDED LOAD VALUE DISPLAY DEVICE FOR CRANE WORK MACHINE


    Weitere Titelangaben:

    クレーン作業機の吊荷重値表示装置


    Beteiligte:
    ATSUMI MASASHI (Autor:in)

    Erscheinungsdatum :

    2016-06-23


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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