A mechanism design approach for workload reduction in parking operation of a double decker bicycle storage rack

Yasuyuki Yamada, Hiromoto Iino, Toshio Morita

Research output: Contribution to journalArticle


Double decker storage racks are established in communal facilities for efficient bicycles storage. However, an upper rack of the rack is rarely utilized, because its workload to users in parking operation is large. This paper discusses a design method of a double decker bicycle storage rack equipped with an original load reduction mechanism. First, questionnaire and electromyogram measurement are conducted, and it becomes clear that the physical load is the largest when users lift the upper rack with bicycle. Next, a load reduction mechanism that consists of a compression spring and a slider is developed, and the mechanism is installed in a double decker bicycle storage rack on market. Finally, it is clarified that the mechanism can reduce the physical load of users effectively, from the results of questionnaire and several evaluation experiments.

Original languageEnglish
Pages (from-to)3276-3282
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number760
Publication statusPublished - 2009 Dec



  • Double decker storage rack
  • Load reduction mechanism human machine interface
  • Mechanical gravity canceller
  • Power asist device

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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