IE_Lecture10-ed

IE_Lecture10-ed - Lecture 10 Industrial Ergonomics (ENGR...

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Unformatted text preview: Lecture 10 Industrial Ergonomics (ENGR 3460U) Cumulative Trauma Disorder structor: Dr Ahmad Barari Instructor: Dr. Ahmad Barari Barari- ENGR 3460U 1 CTD and TOOL DESIGN • Cumulative trauma disorders (CTDs) – Work-related musculoskeletal injuries – Due to repeated microtrauma from • High force, high repetition • Extreme joint motions, lack of rest – repetitive motion injuries • Cost to industry – 15-20% of workers – Average of $30,000/case Barari- ENGR 3460U 2 – OSHA effort ‘Ergonomics Standard’ HAND ANATOMY and CTDs • arpal tunnel syn. Carpal tunnel syn. • Tenosynovitis • endinitis Tendinitis • Trigger finger hite finger • White finger • Raynaud’s disease Barari- ENGR 3460U 3 AND/WRIST POSTURES HAND/WRIST POSTURES • aintain neutral wrist Maintain neutral wrist – Flexion/extension – Radial/ulnar deviation – ↓ grip strength 20-30% • Arms hang down – Abduction fatiguing – Overhead work is very bad Barari- ENGR 3460U 4 AND/WRIST POSTURES HAND/WRIST POSTURES Barari- ENGR 3460U 5 TYPES OF GRIP Power > Lateral > Two pt 100 lbs > 29% > 15% Barari- ENGR 3460U 6 TYPES OF GRIP Barari- ENGR 3460U 7 aintain a Straight wrist Maintain a Straight wrist Barari- ENGR 3460U 8 void Tissue Compression Avoid Tissue Compression Barari- ENGR 3460U 9 void Repetitive Finger Action Avoid Repetitive Finger Action Barari- ENGR 3460U 10 TOOL DESIGN #1...
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This note was uploaded on 10/18/2010 for the course ENGR 3360 taught by Professor Ahmadbarari during the Fall '10 term at UOIT.

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IE_Lecture10-ed - Lecture 10 Industrial Ergonomics (ENGR...

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