抄録
In order to clarify the factors inducing the abolition of the steady state in the continuous low speed works in the industrial labor in general, the author investigated the pattern of the abolition of the steady state in these works by their various consisting factors such as the local muscular work, visual concentration, the maintenance of the working posture in a certain fixed model work. Roughly the following results were thus obtained.
(1) One of the largest factors inducing the abolition of the steady state is presumed evidently to be the localized fatigue of the working muscles.
(2) Although the fact should not be over-looked that the mental and neurotic fatigue such as the visual concentration in the work for flicker value determination is the factor of abolition to the steady slate in this kind of work to a certain extent, its comparative weight to the fatigue of the working muscles is presumed to be considerably smaller.
(3) The fact that the muscular and neurotic fatigue due to the maintenance of the working posture for a long time becomes the factor inducing the abolition of the steady state in this kind of work is considered not too significant as far as that posture is particularly forced.
(4) For the maintenance of the steady state in this kind of continuous low speed work over along period of time, insertion of rests was found more effective rather than the reduction in the intensity of the work itself. Consequently, the accumulation of stress in the case when a certain work, though its intensity is relatively weak, is given, is considered to play an extremely important role in the abolition of the steady state in this kind of work.
