| 摘要 |
A lift device which is easily prefabricated, safe, free from maintenance and inspection, and installable for home-use, and finds such wide applications as escaping means in an emergency and a simple portable footstool. This device comprises a strap-like rail wound in a screw shape and shielded bearings arranged so as to be fitted to the strap-like rail, said rail and said shielded bearings being mounted on and fitted to either the inner periphery of a longer cylinder forming an outer shell or the outer periphery of an inner shorter cylinder telescopically provided with a proper space from the inner periphery of the longer cylinder, said shorter cylinder being mounted thereon with a lift cage through thrust bearings, and said lift cage being locked against rotation and provided thereon with a motor transmittingly rotating the shorter cylinder to thereby effect lifting, and further, relates to a lift device wherein the above-described lift devices are combined in multiple-telescopic structure, thereby allowing cylinders to project telescopically for lifting operation. This lift device comprises a strap-like rail and bearings screw-fitted to the strap-like rail, and is unique in social contribution, etc., in terms of safety, maintainability, modularity and the wide applications. <IMAGE> |
