Mobility in Metamorphic Mechanisms of Foldable/Erectable Kinds

[+] Author and Article Information
J. S. Dai

School of Engineering and Advanced Technology, University of Sunderland, Sunderland SRI 3SD, UK

J. Rees Jones

JP and J Rees Jones, 9 Beaumaris Dr. Thingwall, Heswall, Wirral, Merseyside L61 7XP, UK

J. Mech. Des 121(3), 375-382 (Sep 01, 1999) (8 pages) doi:10.1115/1.2829470 History: Received June 01, 1998; Revised June 01, 1999; Online December 11, 2007


This paper looks at a class of mechanisms that change structure when erected or folded. The class includes a variety of artefacts and decorative gifts and boxes comprised of flat card creased to enable the folding or unfolding of a structure. Such a structure admits kinematic study in keeping with theory of mechanisms when the creases are treated as hinges joining card and paper panels treated as links. New horizons have been brought up in the use and mechanised manufacture of mechanisms of this kind. Here typical types are described in terms of their fundamental parts and their equivalent mechanisms. Screw system theory is brought into the analysis of mechanisms of these kinds, particularly those containing multiple loops. Different geometry and system combinations are used for the study of mobility and kinematics making use of the result from the equivalent screw systems.

Copyright © 1999 by The American Society of Mechanical Engineers
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