| 摘要 |
<p>PURPOSE: To improve the efficiency of work by providing a wire-winding drum with a large-sized diameter, a driving part therefor, slide sheaves sliding parallel with the drum, and an intermediate sheave for changing the direction of its wire, which sheave is arranged ahead of thereof. CONSTITUTION: A structure on the top floor Ny is raised by floor-jacking up apparatus, and working space for constructing a structure on the next lower floor is formed under the top floor Ny. At the same time, a lift way H is extended, wire 202 is rewound by a length corresponding to the height of a single-layer story and a lift is extended. When the lift is extended, a winding drum 2 with winding grooves which is secured by a stop pin is released thereby and the wire 202 of the length of the lift is rewound by driving the drum 2, following which the drum 2 is fastened by the stop pin. Since the wire 202 of the amount of the whole lift is wound on the drum 2, the wire 202 is mechanically rewound each time the the top floor is raised. Furthermore, since slide sheaves 4 are horizontally moved acting in concert with the drum 2, the wire 202 is smoothly rewound and wound. In this way, the lift can be extended mechanically and in a short time.</p> |
