PROBLEM TO BE SOLVED: To provide a lifting machine such as a wheel dolly or a hand lift, which is easy to finely adjust the height of a lifting part.SOLUTION: In a lifting machine, oil in an oil tank 13 is supplied into the inside 5b of a cylinder through an oil supply passage 45 by a raising pump 19, a branch passage 27 branching from the oil supply passage 45 is provided, the branch passage 27 is connected to a lifting pump 20, a check valve 36 is provided between the raising pump 19 and a branching part 26b of the branch part 27 in the oil supply passage 45, and no check valve is provided between the branching part 26b and the cylinder 5 in the branch passage 27 and the oil supply passage 45, so that oil can mutually flow in the inside 5b of the hydraulic cylinder and in the lifting pump 20.SELECTED DRAWING: Figure 12
【課題】昇降部の高さの微調整が容易に行える、ホイールドーリやタイヤリフトやハンドリフト等の昇降機を提供する。【解決手段】油タンク13内の油を、上昇ポンプ19を用いて、油供給路45を通じて、シリンダー内5bに供給し、油供給路45から分岐する分岐路27を設け、分岐路27を昇降ポンプ20に接続し、油供給路45における、上昇ポンプ19と、分岐路27の分岐部26bとの間に逆止弁36を設け、分岐路27及び、油供給路45における、分岐部26bとシリンダー5間には逆止弁を設けず、油が、油圧シリンダー内5bと昇降ポンプ20内を相互に流通することができるようにした。【選択図】 図12
LIFTING MACHINE
昇降機
2017-02-16
Patent
Electronic Resource
Japanese
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 / B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |