| 摘要 |
<p>PURPOSE:To realize two-dimensional and three dimensional motions at a arbitrary position by way of arrangement of pins, by forming more than one hole in a part of each spherical surface so that a pin is press-fitted in one of the holes while a pin is loosely fitted in the other one of the holes. CONSTITUTION:When a pin 30 is inserted into a coupled links 36, the pin 30 is tightly press-fitted in a large diameter part 9 while a pin is loosely fitted in a small diameter part 12, and the length of the larger pin is selected such that it does not project into the small diameter part 12. Further, if the pins 30 are engaged into each link at four positions, the links are made to be impossible to be flexible, and to be fixed so that it may has a self-sustaining ability. Further, the pins 30 are engaged at two positions or one position, laterally symmetrical, the links are flexible in one direction so that a two-dimensionally movable support member may be provided. In this arrangement the pin 30 is inserted at the center of a curve, the curving motion may be smoothly made. Accordingly, it is possible to realize two-dimensional or three dimensional motions by way of arrangement of the pins 30.</p> |
