| 摘要 |
PURPOSE: A portable crane is provided to easily move a crane by making the crane with a variable weighted object having a reservoir water space. CONSTITUTION: A portable crane is comprised of a body(10), a weighted material(20), a boom(30), a driving part(40), a controller(50), the wire(60), and a worktable(70) The body comprises a fixing jack(11) and a caster(12) while being installed in the rooftop of a building. The weighted material is installed in the top side of the body and includes a reservoir water space(23), a cover, and a drain. The boom is installed in the left and right side of the weighted material and includes a roller and a wire drum. |
