Abstract：
OBJECTIVE:The aim of this study was to determine how hand space for manual insertion of flexible hoses is affected by insertion method and force. BACKGROUND:Adequate space is needed during assembly tasks in which workers join parts together with their hands. Hose installations are an example of such a task. Hand clearance envelopes for insertion tasks that involve cylindrical objects, such as a hose, are currently unavailable in the literature. METHODS:Participants inserted a flexible 25-mm rubber hose onto a stationary flange using simulated methods similar to those observed in field studies of automotive assembly tasks. Markers placed on the back of the hand and wrists were used to measure postures during the insertion task. RESULTS:Hand clearance envelopes for high-force insertions were significantly larger across methods by an average of 15% for both male (p < .05) and female (p < .01) participants. Rocking insertions resulted in the largest hand clearance envelopes compared with other insertion methods. Rocking and twisting the hose resulted in mean increases in the cross-sectional area of the hand clearance envelopes of 35% and 24%, respectively, compared with the straight push. Differences were significant (p < .05) for male and female participants for both bead height conditions. CONCLUSION:Both required insertion force and method affect hand clearance envelopes during simulated insertions. APPLICATION:These methods can be used by engineers to determine if there is adequate clearance for the hand to grip selected objects.
journal_name
Hum Factorsjournal_title
Human factorsauthors
Grieshaber DC,Armstrong TJ,Chaffin DB,Keyserling WM,Ashton-Miller Jdoi
10.1177/0018720809336414subject
Has Abstractpub_date
2009-04-01 00:00:00pages
152-63issue
2eissn
0018-7208issn
1547-8181journal_volume
51pub_type
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