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Ergonomic hand tool interventions for the furniture manufacturing industry.

Authors
Smith-CA; Mirka-GA; Myers-KA
Source
Proceedings of the IEA 2000/HFES 2000 Congress, Vol. 5, San Diego, CA, July 30-August 4, 2000. Santa Monica, CA: Human Factors and Ergonomics Society, 2000 Jul; 5:99-102
NIOSHTIC No.
20026164
Abstract
This project focused on the development of ergonomic interventions to reduce the incidence of musculoskeletal problems in the furniture manufacturing industry. The results of an industry-based survey provided a list of the high priority jobs to be addressed with ergonomic interventions. This paper focuses on the development and evaluation of two of these interventions: an upholstery hand tool and an ergonomic interface for a random orbital sander. Laboratory testing was performed to examine the ergonomic issues with use of each intervention. A reduction in risk factors was found with use of the interventions. The upholstery hand tool reduced grip force from 36 to 18 N, improved hand posture by changing from a pinch grip to a power grip, and reduced the repetition rate from 40 to 24 repetitions per minute. EMG analysis of intrinsic and extrinsic muscles showed a reduction in overall muscle activity and a shift from the intrinsic muscles to the extrinsic finger flexor muscles. The ergonomic interface for the random orbital sander was designed to reduce exposure to vibration and eliminate the need for sustained, static grip force. A subjective survey of users revealed both a short and long term improvement in user comfort and fatigue, while a pre-post study design revealed no significant change in grip strength.
Keywords
Ergonomics; Injury-prevention; Musculoskeletal-system-disorders; Musculoskeletal-system; Furniture-industry; Furniture-manufacture; Furniture-workers; Power-tools; Hand-tools; Engineering-controls; Control-technology
Publication Date
20000730
Document Type
Conference/Symposia Proceedings
Funding Amount
368836
Funding Type
Grant
Fiscal Year
2000
NTIS Accession No.
NTIS Price
ISBN No.
0945289138
Identifying No.
Grant-Number-R01-OH-003701
Source Name
Proceedings of the IEA 2000/HFES 2000 Congress, Vol. 5, San Diego, CA, July 30-August 4, 2000
State
CA; NC
Performing Organization
North Carolina State University, Raleigh, North Carolina
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