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One of the major problems faced by impaired mobility persons is the stairs in the entrance of the buildings. For overcoming these obstacles different carriers designed and manufactured. These carriers may also be classified by direction of moving, such as vertical, inclined or mobil carriers. The inclined platforms for seated, standing and wheel chair users can be manufactured by compatible to stairs like straight, cascaded, helical etc. Vertical platforms are designed and manufactured with a constant travel distance or specially for desired building. Vertical platforms may also be classified by the types of power and mechanism, such as trapezoidal screw-nut, hydraulic (direct-indirect) rack-pinion gear, rope and drum, chain drive and scissor type etc. Rules for safety, dimensions and functional operation standards for these machines are defined in TSE-ISO 9386-1. In this work a design study is given for a vertical screw-nut driven platform for using outdoor places which is appropriate for defined standards. A real time optimization process is described for minimizing the weight of system and costs. In the optimization process; suitable manufacturing parameters are taken into account while material and dimensional optimization is applied for obtaining the allowed factor of safety (FOS). So the higher cost materials are nested with focusing the design and so wastage material are minimized.
International Symposium on Industrial Design Engineering
ISIDE14
Ahmet CAN