| 摘要 |
PROBLEM TO BE SOLVED: To solve problems with this type of lift, by a simple mechanism and a reasonable means without increasing the number of component parts of the lift. SOLUTION: In the hydraulic synchronous lift having a master cylinder and a sub cylinder connected in series through a hydraulic synchronous circuit, a specified stroke A is provided at the lower end part 45 of the operating lever 31a of the master cylinder 31A in the space thereof from a stopper installed at the operating lever 31. At the initial time when a lifting up valve 35A in a hydraulic circuit is opened, a movable piston 46 is fitted into the cylinder so that only the movable piston 46 can be slidably moved upward by first hydraulic oil (a).
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