| 摘要 |
The present invention relates to an S-setter for lifting a coaming member and a lifting jack with a roller for operating a lifting device in the S-setter. The lifting jack comprises a piston housing vertically installed on a base frame of the S-setter; a spring installed in the piston housing; a piston which is inserted into the piston housing and is elastically supported by a spring; a pedal having a front end coupled to the base frame to be rotated; and a roller which is coupled to the pedal through a bolt and presses the top end fo the piston. The lifting jack improves the coupling structure of the pedal, enables the easy attachment and detachment thereof, and efficiently operates the piston. |
