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RISS 인기검색어
- 검색키워드
- 주제어 : A-type hand tools (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Optimal Grip Span of A-type Pliers in a Maximum Gripping Task
Yong-Ku Kong,Jin Woo Jung,Sangmin Kim,Heewoong Jung,Hakje Yoo,Dae-Min Kim,Hyun-Sung Kang 대한인간공학회 2013 大韓人間工學會誌 Vol.32 No.6
Objective: The objective of this study is designing an optimal hand tool through maximum grip force study accordance to the hand grip span. Background: In order to prevent musculoskeletal diseases, studies on hand tool design are proceeding based on grip strength, finger force, and contribution of individual finger force on total grip strength. However, experimental apparatus using a tool that is actually used in work place was almost non-existent. Method: 19 males were participated in an experiment. Using the load cell inserted real plier, finger force, grip strength, and subjective discomfort rate of both hands (dominant and non-dominant) were measured in 5 different hand grip span(45mm, 50mm, 60mm, 70mm, and 80mm). Results: There was significant difference(p<0.001) of total grip strength, individual finger force and subjective discomfort rating according to various hand grip span(45, 50, 60, 70, and 80mm). Also, statistically significant different(p<0.001) was shown between the dominant hand and non-dominant hand. In addition, individual finger force in maximum grip was in order of middle finger, ring finger, index finger, and little finger. Conclusion: Optimal grip span of pliers that exerting maximum grip strength is 50~60mm. Application: This finding is expected to be used for designing proper pliers.
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Evaluation of pliers in a maximum gripping task
Yong-Ku Kong,Min-Tae Seo,Ji-Soo Kim,Hyun-Sung Kang 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.5
Objective: The objective of this study is to derive the optimal grip span of pliers in a maximum gripping task. Background: Although many previous studies have been performed for I-Type and cylinder-type handles and evaluated their various grip span size, there are only few studies regarding on A-Type handles such as pliers. Methods: A total of 25 males participated in this experiment and conducted maximum gripping task using custom-made pliers with three grip spans (50, 70, and 90㎜). The effects of grip spans on grip strength, muscle activity, and subjective discomfort were analyzed. Results: The experimental results showed that total grip strength of 50㎜ grip span had significantly higher than another grip spans. Subjective discomfort showed that the discomfort rating of radius side of the palm was higher than most other parts, significantly. The %MVC of the muscle has no significant difference in three grip span. Conclusion: It was recommended to use the 50mm grip span to exert the maximum grip strength with similar muscle activities in uses of pliers. Application: This finding is expected to be used as the basic data for designing proper pliers.
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