TABLE LIFT DEVICE

PROBLEM TO BE SOLVED: To solve the problem that fluctuation of thrust of an electric cylinder becomes large depending on a shape of a cam surface when a tilting fulcrum of the electric cylinder is matched to the rotation center of lift arms in the case of structure for moving a drive roller sandwiched between the cam surface of an inner arm and the cam surface of an outer arm to vertically extend and contract the lift arms by using the electric cylinder as a drive source in a lift device which elevates a table in parallel by interposing the X-shaped lift arms between a base installed on the floor and the table for loading a load, and to suppress the fluctuation of the thrust of the electric cylinder without correcting the cam surface.SOLUTION: A table lift device can change a pressed state of a drive roller to the cam surfaces 30a, 31a to suppress fluctuation of thrust by setting a tilting fulcrum 21 of an electric cylinder 20 at a position avoiding the rotation center 13 of lift arms 10.