The present invention relates to a free fall prevention apparatus of a forklift fork by blocking a working oil leak. More specifically, the present invention relates to a free fall prevention apparatus of a forklift fork by blocking a working oil leakage, in which, when the fork loading cargo is lifted and fixed, and the work such as pipe welding is conducted continuously for a long time at a certain height, a spool is formed on a flow rate control valve controlling the working oil supplied to a cylinder for the forklift from a main valve, and the working oil leak is prevented from the cylinder for the lift by a driving means which operates the spool. Accordingly, the free fall prevention apparatus is able to prevent the fork from freely falling despite the will of a driver. In the flow rate control valve controlling the working oil supplied to the cylinder for the lift of the forklift fork by operating the main valve, the spool (11) is formed on a body (6) of the flow rate control valve (10). The spool (11), which controls the opening/closing of a flow path (16) on the side of the main valve (1) and a flow path (17) on the cylinder (3) side, forms the driving means on an upper surface of the body (6).

    본 발명은 작동유 유출 차단을 통한 지게차 포크의 자유강하 방지장치에 관한 것으로, 더욱 상세하게는 화물이 적재되는 포크를 리프팅시켜 고정시킨 상태에서 배관용접등과 같은 작업을 소정높이에서 장시간동안 연속으로 하게 되는 경우, 메인밸브로부터 포크리프트용 실린더에 공급되는 작동유를 조정하는 유량조절밸브에 스플(Spool)을 형성하여 스플을 작동시키는 구동수단의 조직으로 리프트용 실린더로부터 작동유의 유출됨이 차단되도록 함으로서 운전자의 의사에 반하여 포크의 자유강하됨을 방지할 수 있도록 된 것에 관한 것으로, 메인밸브조작으로 지게차 포크의 리프트용 실린더에 공급되는 각동유를 조정하는 유량조절밸브에 있어서, 상기 유량조절밸브(10)의 몸체(6)에 스플(11)을 형성하고, 메인밸브(1)측의 유로(16)와 실린더(3)측의 유로(17)를 개폐되도록 조정하는 스플(11)이 구동수단을 몸체(6)상면에 형성한 것이다.


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    Title :

    Free fall prevention device of forklift fork by blocking oil leakage


    Additional title:

    작동유 유출 차단을 통한 지게차 포크의 자유강하 방지장치


    Contributors:

    Publication date :

    2021-09-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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