| 摘要 |
Provided is a gas pressure-type gravity compensation vertical lift mechanism that lifts freight (100) and comprises a control unit (25) that performs control so that a gas cylinder (2), that causes a drive force in the ascending direction to act upon a lifting structure (41), selectively connects to constant pressure gas cylinders (9, 15) that are maintained at a constant pressure in accordance with a held state, and so that for each change in the held state, the sum of the capacity of the gas cylinder and the constant pressure gas cylinder is the sum of the average capacity of each. |
