Document ID (ISN) | 30731 |
CIS number |
79-270 |
ISBN(s) |
91-7464-023-2 |
Year |
1978 |
Convention or series no. |
|
Author(s) |
Carlsöö S., Hansson J.E., Uppsäll M. |
Title |
Optimum working range in the operation of levers |
Original title |
Optimala arbetsområden vid manövrering av handreglage [in Swedish] |
Bibliographic information |
Arbete och hälsa - Vetenskaplig skriftserie 1978:12, Arbetarskyddsverket, Stockholm, Sweden, 1978. 38p. 15 ref. |
Abstract |
In this study, 20 seated subjects themselves determined the best location for 2 types of lever at 3 different work heights. The load on the shoulder muscles was measured electromyographically in 6 subjects. The optimum range was quite small, and usually had the shape of an ellipse. Lever locations providing an elbow angle of about 105° when the arm was parallel to the trunk were the most comfortable. Use of an arm support increased the load on the shoulder in forward-backward movements, and reduced it in lateral movements. Optimum locations for levers are recommended: levers used more than 2-3h/day should be adjustable. |
Descriptors (primary) |
control levers; reach distance; design of equipment; optimization; layout of controls |
Descriptors (secondary) |
sitting posture; forearm supports; ergonomic evaluation; electromyography; measurement of load on muscles |
Document type |
E - Books, reports, proceedings |
Subject(s) |
Ergonomics and work organization
|
Broad subject area(s) |
|
Browse category(ies) |
Anthropometry Ergonomics
|