機械の構造規則

抄録

Drawing is a traditional means to describe machines and mechanical components. Man can extract the information that is necessary in designing and manufacturing processes without difficulty by virtue of his pattern-recognitive ability. But the topological structure of a machine, which is a fundamental feature of it and also practically used for constructing the data base for a computer aided design system for example, can not be extracted easily from the drawing because it contains less organized information about a machine. In the present paper, a method to represent the organized information of a machine in the aspect of topological structure is proposed. Firstly, a group of connectivity graphs is defined as description of a machine. The description represents machine structure explicitly and makes it possible to discuss the structural property strictly through the graph theoretical property of connectivity graphs. Secondly, by using them the anatomy of machine is attempted on some machines. Thirdly, by investigating those connectivity graphs obtained, some general rules and types of structure are extracted. They are essential in the notions of hierarchical and topological structure of machines. The knowledge about these fundamental properties is shown indispensable for constructing CAD systems especially the data base for them.