2011 Spiral Escalator

2011 Spiral Escalator

Nakatani::
A circulating circular escalator has a vertically-oriented relatable cylinder extending between upper and lower floors. An annular stairway having a plurality of steps is disposed about the relatable cylinder. An annular cam member is disposed around the relatable cylinder for cramming and guiding the steps to move along the stairway, and a landing board extends over each of the upper and lower horizontal runs of the stairway. The stairway includes a lower horizontal run at a lower floor level, an upper horizontal run at an upper floor level, and ascending and descending sloped runs connected between the lower and upper runs. The sloped runs may be used for conveying passengers, or either one of the runs may be used as a return run. The inner sides of the steps are attached to the relatable cylinder for rotation therewith, the steps each being independently vertically slidable relative to the relatable cylinder. The steps are supported and guided by vertical guide rails on the relatable cylinder and guide rollers on the steps for smooth translational movement. The load-bearing run may be made longer and therefore less steep than the return run. At least one intermediate horizontal run with a landing board may be disposed at an intermediate level between the upper and lower horizontal runs for serving an additional intermediate floor. (Wheeler, G. A., "Elevator," U. S. Patent 479864, Aug. 2, 1892.)

Summary of the Invention
Object of the invention is to provide an escalator, which can be placed within the narrowest possible space, without loss of any of the advantages of the escalators. ”This problem is solved according to the invention in that the escalator is guided like a spiral staircase. that the stairs have steps which are spaced like a sector of a circle, that only the broader, outer side-ends of the stairs are coupled with the respective adjacent stairs by connecting elements, which permit pivoting of the stairs relative to each other around an approximately vertical axis and furthermore an approximately vertical shift of the stairs relative to each other, that the stairs in the staircase area pass across at least one stationary, spiral type

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Nakatani::

Summary of the Invention