PROBLEM TO BE SOLVED: To wind up a rope with an anchor without relying upon a human power and to remove and store it without demolishing the shape. SOLUTION: After a conical roller 5 is provided in a vessel and the rope with an anchor is continuously wound up by a driving device 9 or the like, the rope with an anchor can be removed without demolishing the shape by removing a side end plate of the conical roller. COPYRIGHT: (C)2003,JPO