| 摘要 |
PURPOSE: A lifting jack apparatus is provided to prevent damage to lifting jacks and an object caused by the uneven operation of the lifting jacks. CONSTITUTION: A lifting jack apparatus comprises a plurality of lifting jacks(10), a load cell, a controller(30), and a revolution sensor. Each lifting jack comprises a motor, a screw driven with the motor, and a lifting point which raises or lowers an object. The load cell is coupled to the lifting point of the lifting jack in order to detect the load supported by the lifting jack. The controller interlocks with the lifting jacks and the load cell to display the load value sustained on each lifting jack and control each lifting jack. The revolution sensor is formed on the upper side of the lifting jack, detects the number of rotation of the screw to measure the moving distance of the lifting point, and transmits the measured distance to the controller. |
