Advanced SearchSearch Tips
Compatibility of the Direction Sign on the Pendant Switch of Overhead Cranes
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Compatibility of the Direction Sign on the Pendant Switch of Overhead Cranes
Park, Jae Hee;
  PDF(new window)
Objective: The aim of this study is to suggest the standard of the direction sign on the pendant switch of overhead cranes which can reduce human errors in control. Background: A great number of crane accidents occur in industries. One of the major causes of the accidents is the mistake in the control of cranes by confusing the orientation of crane movements. Nevertheless, three different direction sign styles, 'East, West, South, North (EWSN)', 'Forward, Backward, Left, Right (FBLR)', and arrows for four directions are used without standardization. Method: An overhead crane simulator was installed for a laboratory experiment. It could move along six directions by the control of a pendant switch. 90 participants were evenly assigned to the three different conditions of direction sign styles. The participants were asked to control the pendant switch according to the continuously appearing 16 direction signs on a monitor ahead. The participants were allowed to refer an orientation sign board on the ceiling representing correct movement directions of the overhead crane simulator. Results: The direction sign style, 'EWSN', showed statistically significant better performance in task completion time and number of errors than the other sign styles. The direction sign style, 'EWSN', adopting the cardinal direction system, made the participants clear in direction controls after customizing to the crane movements. However, the direction sign styles, 'FBLR' and the arrows adopting the relative direction system made conflicts in direction controls due to the egocentric view of human. Conclusion: The direction sign style, 'EWSN', is the most appropriate for the standardization of the direction sign on the pendant switch of overhead cranes. Application: The results of this study can be applied to the standardization of direction sign in the legal notification on the safety certifications of crane manufacturing.
Compatibility;Overhead crane;Human error;Direction sign;Pendant switch;Cardinal direction;
 Cited by
이동식 크레인 사망재해의 인지공학적 대안,강현수;박범;

대한안전경영과학회지, 2015. vol.17. 4, pp.135-141 crossref(new window)
KOSHA, Cases of fatal crane accidents, Safety, 2009.

KSA, Crane-control, layout and characteristics, KS B ISO 7752-1, 2012.

Ministry of Employment and Labor, Legal notification on safety inspection, 2013-15, 2013.

Ministry of Employment and Labor, Legal notification on the safety certifications of dangerous machines, 2012-33, 2012.

Ministry of Employment and Labor, Yearly analysis report of industrial accidents, 2003-2012.

Park, J.H. et al., A study on the prevention of caught accidents of overhead crane, KOSHA, 2014.

Park, J.H. et al., Ergonomic modifications for preventing crane accidents, Proceedings of ESK 2006 fall conference, Ergonomics Society of Korea, 2006.

Sen, R,N. and Das, S,. An ergonomics study on compatibility of controls of overhead cranes in a heavy engineering factory in West Bengal, Applied Ergonomics, V.31, pp.179-184, 2000. crossref(new window)

Seo, E.H. et al., Ergonomic modifications of man-machine work system: Focused on crane work, KOSHA, 2006.