Planar double chain linkages 61
span the entire inner space. In plan, these chains are formed by a series of
continuous beams with multiple kinks, which, in practice, can be made by
other rigid structures with span and depth to provide sufficient stiffness
and coverage as long as all the hinges are at the right places. Kassabian et
al. (1999), Jensen and Pellegrino (2002) and Luo et al. (2007) proposed
methods for replacing the angulated beams with rigid plates that can
provide complete coverage. Readers may refer to their articles for details.
Here we show two of the assemblies devised by their approach in Figure
3.24 where all the plates neatly meet with one another once the assemblies
fold. Various other ways of designing plates also exist if overlapping of
plates is allowed. This is only practical provided that the adjacent plates
are placed at different heights to avoid physical collision of the plates
during motion.
span the entire inner space. In plan, these chains are formed by a series of
continuous beams with multiple kinks, which, in practice, can be made by
other rigid structures with span and depth to provide sufficient stiffness
and coverage as long as all the hinges are at the right places. Kassabian et
al. (1999), Jensen and Pellegrino (2002) and Luo et al. (2007) proposed
methods for replacing the angulated beams with rigid plates that can
provide complete coverage. Readers may refer to their articles for details.
Here we show two of the assemblies devised by their approach in Figure
3.24 where all the plates neatly meet with one another once the assemblies
fold. Various other ways of designing plates also exist if overlapping of
plates is allowed. This is only practical provided that the adjacent plates
are placed at different heights to avoid physical collision of the plates
during motion.