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Ex. 4-1 Lifting Box into Car

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Ex. 4-1 Lifting Box into Car

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    1. IE 327 1

    2. IE 327 2 Ex. 4-1 Lifting Box into Car 30 lb box from ground into trunk Twist 90 to pick up Ground level ? V = 0 Min horizontal ? H = 10 Trunk ? H = 25, V = 25 One-shot lift, FM = 1 No cutouts, CM = 0.95

    3. IE 327 3 Ex. 4-1 Lifting Box into Car

    4. IE 327 4

    5. IE 327 5 COUPLING MULTIPLIER

    6. IE 327 6 Effect of Multipliers - 1

    7. IE 327 7 Effect of Multipliers - 2

    8. IE 327 8 Effect of Multipliers - 3

    9. IE 327 9 Lifting Interventions Decrease H Avoid twisting Turntables Extra step Lift tables Tilt tables Hoists

    10. IE 327 10 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 AKA: repetitive motion injuries Cost to industry 15-20% of workers Average of $30,000/case OSHA effort Ergonomics Standard

    11. IE 327 11 HAND ANATOMY and CTDs Carpal tunnel syn. Tenosynovitis Tendinitis Trigger finger White finger Raynauds disease Rotator cuff Thoracic outlet syn.

    12. IE 327 12 HAND/WRIST POSTURES Maintain neutral wrist Flexion/extension Radial/ulnar deviation ? grip strength 20-30% Arms hang down Abduction fatiguing Overhead work is very bad

    13. IE 327 13 TYPES OF GRIP

    14. IE 327 14 CTD risk analysis Similar to NIOSH 4 factors Frequency Posture Force Misc Index < 1

    15. IE 327 15

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