抄録
A method to design the two-dimensional shapes of patterns of brassiere cup is proposed. A brassiere cup consists of several patterns and their shapes are designed by repeatedly making a paper cup model and checking its three-dimensional shape. For improvement of design efficiency of brassieres, such trial and error must be reduced. As a cup model for check is made of paper not cloth, it is assumed that the surface of the model is composed of several developable surfaces. A developable surface is generated by sweeping a straight line, which is referred to as a generatrix, along a three-dimensional curve. In this paper, it is revealed that the direction of a generatrix can be determined geometrically when the threedimensional shapes of edges of a pattern are given. By using this direction of a generatrix, we can design the twodimensional shape of the pattern. It is experimentally verified that the pattern designed by our proposed method is almost coincided with the measured shape of a pattern, which is used for making three-dimensional shape of edges.
