Elevator hoisting device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKazutoshi Ohta, Katsuhiko Suzuki
Life of this patent
Estimating the term…
Abstract
An elevator hoisting device including a stator forming a primary side of a linear motor disposed on an wall of a hoistway adjacent to its ceiling, a tape-shaped amorphous metallic member for hanging down over a pulley to support at opposite ends thereof an elevator car and a counter weight so as to cause its pendent portion connected to the counter weight to be close to the stator through a non-magnetic member with a low coefficient of friction to form a secondary conductor of the linear motor. The non-magnetic member and therefore the adjacent surface of the stator is somewhat tilted to the vertical downward toward the wall of the hoistway.
Claims4
An elevator hoisting device, comprising
- a linear motor having a stator for being disposed on the side of a building and forming the primary side of said motor;
- an elevator car;
- a counterweight;
- at least one longitudinally extending tape-shaped metallic member, continuously flexible all along its length, connected at opposite ends thereof to said elevator car and said counterweight;
- and
- means for engaging said member intermediate said opposite ends at a location above said elevator car and said counterweight so as to vertically support said member, said elevator car and said counterweight, said member being movable longitudinally with respect to said means so as to move said elevator car and counterweight in opposite vertical directions therewith, the portion of said member between said location and said counterweight being located close to said stator so as to be vertically driven by magnetic forces from said stator, whereby said portion functions as a secondary electrical conductor of said linear motor;
- said elevator car and said counterweight being movable with said member between first positions in which said elevator care is adjacent said engaging means and said counterweight is substantially below said engaging means, and second positions in which said counterweight is adjacent said engaging means and said elevator car is substantially below said engaging means, said stator being located adjacent said engaging means so as to oppose said portion when said elevator car and said counterweight are in either of said first positions and said second positions;
- said portion of said member including a vertically extending uppermost part, said stator having a front face opposing said uppermost part and tilted downwardly and away from said uppermost part.
Dependencies are inferred from the claim text.