Simulation of the After-Reach Hazard on Power Presses Using Dual Palm Button Actuation

Abstract

This paper describes a study of the after-reach hazard when a power press simulator is used. The after-reach hazard occurs when a worker reaches into a point of operation on a power press after the press cycle has been initiated. The hand-reach speed of industrial workers was measured to quantify the after-reach hazard and to determine variables that may affect after-reach movements. Significant differences in hand speed were identified, which were based on the age and gender of the worker. The location of the dual palm buttons in relation to the point of operation also significantly affected hand speed. Male workers who were 30 years of age or younger demonstrated the fastest hand speed and thus appear more likely to sustain a traumatic injury due to the after-reach hazard. The results of this study are compared with current federal standards.