To keep a relation between a direction of lever operation and a direction of slide of a spool of an operation valve constant regardless of a layout of the operation valve.SOLUTION: An operation valve 42 comprises: a main body 84; flow paths 89 forming a passage of hydraulic oil in the main body 84; a spool 85, arranged in the flow paths 89, which is slid in a longitudinal direction 8 through a second lever 62 to adjust a direction and a flow rate of the hydraulic oil; and a connection adaptor 86 that supports the second lever 62 turnably. The connection adaptor 86 forms a lever with a front end part 80 of the spool 85, a site thereof connected to the spool 85 as a point of load, cooperatively with the second lever 62, which has support parts 93 and 94 that support the second lever 62 to constitute a fulcrum. The support part 93 is laid out so that the point of load is displaced in the same direction as an operation direction of the second lever 62. The support part 94 is laid out so that the point of load is displaced in the opposite direction of the operation direction.SELECTED DRAWING: Figure 6

    【課題】操作バルブのレイアウトにかかわらず、レバー操作の向きと操作バルブのスプールのスライドの向きとの関係を不変とする。【解決手段】操作バルブ42は、本体84と、本体84内で作動油の通路を形成する流路89と、流路89内に配置され、第2レバー62を介して前後方向8にスライドされることで作動油の方向及び流量を調整するスプール85と、第2レバー62を回動自在に支持する連結アダプタ86とを備える。連結アダプタ86は、第2レバー62と協働してスプール85との連結部位であるスプール85の前端部80を作用点とする梃子を形成し、第2レバー62を支持して支点を構成する支持部93、94を有する。支持部93は、第2レバー62の操作向きに対して作用点が同向きに変位するようにレイアウトされている。支持部94は、上記操作向きに対して作用点が反対向きに変位するようにレイアウトされている。【選択図】図6


    Access

    Download


    Export, share and cite



    Title :

    OPERATION VALVE AND CRANE


    Additional title:

    操作バルブ及びクレーン


    Contributors:

    Publication date :

    2019-08-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / F16K VALVES , Ventile



    EMERGENCY-OPERATION VALVE BLOCK FOR A MOBILE CRANE

    SCHÜRMANN JOHANNES / SCHMITHÜSEN THOMAS / BOHMANN VERENA et al. | European Patent Office | 2024

    Free access

    CRANE OPERATION SYSTEM AND CRANE OPERATION METHOD

    HOSHIJIMA KAZUTERU | European Patent Office | 2023

    Free access

    CRANE OPERATION METHOD AND CRANE

    DAVID KEILHAUER / TOBIAS EBINGER / DENNIS SKUDLAREK | European Patent Office | 2022

    Free access

    CRANE OPERATION SYSTEM AND CRANE OPERATION INSTRUCTION METHOD

    MATSUURA MASAHIRO | European Patent Office | 2022

    Free access

    CRANE OPERATION TOOL AND CRANE

    MUTA GAKUSHI / ARITA RYUICHI / TAKEUCHI KOHEI | European Patent Office | 2023

    Free access