Abstract
An apparatus to assist elderly patients to stand up, as well as for the upper body to lean forward, has been developed. The mechanism of the apparatus enables to shift the person's center of gravity along an adequate trajectory during the standing up process, so as not to cause strain on the joints of the user's leg. On a basis of this concept, a bed type which supports from the back of the user was developed. To verify the validity of the apparatus, we performed interviews and measuring experiments of the body motion and of the center of gravity. We also found that checking both trajectories was important to the comfort of the subject. From the results, by using these apparatuses, the user can stand up easily and our hypothesis was confirmed.
