A study on Safety Design Requirements against Nullification of Safeguards for Industrial Machines

Abstract

This paper proposes a safety design to prevent labor accidents due to the nullification of safeguards. Causes of nullification are specified in cases of accidents involving industrial machinery. They are categorized in terms of laborsaving. It turns out that the safety requirements to improve mechanical equipment vary according to the categories. An issue of conventional safety design is discussed considering the nullification causes. A new approach to deal with the issue is introduced and a methodology of system control is demonstrated as an example of its application.