The Relation between Motion Characteristics According to the Arm Used and Motion Directions
Fumihiko Inoue, Mitsuyuki Kawakami, Takayoshi UKAI · TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C · 2003
This research pays attention to "Get and Place Activities" that compose labor intensive work. The PTS method which defines the standard value of motion time does not consider the arm used. What this research proposes is to pursue the factors for planning the optimum work system which can improve productivity, and to clarify the motion characteristic differences between the right and left hand used. The research method is to observe and measure the movement characteristics of a typical standing worker doing "Get and Place Activities". The evaluation indexes used in this experiment include the measured motion locus, motion velocity, motion time and mvoelectric potential. The results have shown (1) the existence of reasonable motion direction according to the arm used, and (2) a proposed experimental formula expressing the relationship between the motion time and motion direction by the right arm, and the optimum angle to obtain the reasonable motion direction.