Abstract
Many researches on the optimum height for the working board had been studied in Japan since 1922. Particularly, after the World War II, we could find many results of careful studies which were studied in the different methods on the optimum height for the kitchen counters. But yet we have not found the results which express the most suitable height of it with reasonable methods. Therefore, the purpose of this study is to establish the criteria for the most suitable height possibly from the floor to the working surface of the kitchen counters for women to perform normal kitchen work while standing. At first, we have checked up the procedures of the traditional measurement with a new apparatus, that is, a successive automatic Respiration Analyzer. Next, we have surveyed the amount of energy expended in removing the kitchen utensil on the working surface. The general plan of this experiment consists of the following four heads, 1) subjects are seven young and sound females whose physical characteristics are shown in Table 2, 2) four degrees of height are selected from 60cm, 70cm, 80cm, 90cm, 100cm and 110cm height of kitchen counter according to elemental height of each subjects, 3) kitchen utensil to be used in working is a single handed pan, which weight is 1.0kg and which dimentions are about 14.5cm in diameter and 7.4cm in height and 4) working motions are given as to remove the utensil on the working surface right and left (50cm), as well as front and rare (35cm) horizontally, and repeated in constant velocity at 15 times per a minute. As results of these experiments, 1. The heights of kitchen counter have been found which is expended as the least amount of energy by each subjects (See Table 3). 2. The experimental formulas have been gained which will show suitable height of kitchen counter with each standardized height of human body (height, shoulder, neck, elbow, wrist, upper and lower elbow). 3. The formula (6) has been shown which is based on a height of wrist as one with a higher degree of accuracy.
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