| 摘要 |
PURPOSE: An improved hoist is provided to efficiently perform the moving work of objects by freely changing the position of a hoisting unit having a hook within a maximum work radius. CONSTITUTION: An improved hoist comprises a main shaft (102), a rotation bar (103), a position determiner (110), and a first level maintenance bar (111). The main shaft is protruding downward from a ceiling (101). The rotation bar is installed on the bottom end of the main shaft. The position determiner is installed on one end of the rotation bar and has a hoisting unit (105). The first level maintenance bar is installed on the other end of the rotation bar and maintains the level of the rotation bar when the position determiner is pulled downward. |
