Hand/arm forces with pneumatic nail gun actuation systems

Details

• Personal Author:
  Albers, James T. ; Hudock, Stephen D. ; Lowe, Brian D.
• Description:
  A biomechanical model is presented to estimate cumulative user hand/arm force associated with two pneumatic nail gun trigger systems. The contact actuation trigger (CAT) can fire a nail when the user holds the trigger depressed first and then "bumps" the nail gun safety tip against the workpiece. With a full sequential actuation trigger (SAT) the user must press the tip against the workpiece prior to activating the trigger. The SAT is demonstrably safer in reducing traumatic injury risk, but increases the duration (and magnitude) of tip force exertion. Time integrated hand force was calculated for a single user from measurements of the tip contact force with the workpiece and transfer time between nails as inputs to a quasi-dynamic model of nailing in two task orientations. Application of the model shows the hand/arm force dependence upon the orientation of the workpiece in addition to the trigger system. Based on standard time allowances from work measurement systems (i.e. MTM - 1) the model results suggest that efficient application of tip contact force with the SAT would reduce total hand/arm force exertion attributable to this trigger system for this user. The present model is useful for considering differences in cumulative hand/arm force exposure between the SAT and CAT systems and the user perceptions and practices that result from these differences. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Ergonomics Fatigue Musculoskeletal System Occupational Health Safety
• Keywords:
  Arm-injuries Author Keywords: Nail Gun Biomechanical-modeling Biomechanics Force Hand-tools Measurement-equipment Models Pneumatic-tools Tools Weight-factors Workers

  More +
• ISSN:
  1071-1813
• Publisher:
  Human Factors and Ergonomics Society
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Illinois ; Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  58
• NIOSHTIC Number:
  nn:20045608
• Citation:
  Proceedings of the Human Factors and Ergonomics Society 58th Annual Meeting, October 27-31, 2014, Chicago, Illinois. Santa Monica, CA: Human Factors and Ergonomics Society, 2014 Sep; 58:1575-1579
• Federal Fiscal Year:
  2014
• NORA Priority Area:
  Construction
• Peer Reviewed:
  True
• Source Full Name:
  Proceedings of the Human Factors and Ergonomics Society 58th Annual Meeting, October 27-31, 2014, Chicago, Illinois
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a5b688faa59ce5e5b901d430f59596f29fd8c276a12a749da973bd0991f5e328d4f9bf281eae56f09d7b970d1936e0c7cf64dcc439d3259433e9dae23db4a68f
• Download URL:
  https://stacks.cdc.gov/view/cdc/200961/cdc_200961_DS1.pdf
• File Type:
  [PDF - 1.68 MB ]