| 摘要 |
A motion converting mechanism according to the present invention is constructed such that pinion gears (10, 11) are in meshing engagement with a circular arcuate gear (8) for performing reciprocating circular arcuate motions about a pivot, and two sets of one-way clutch mechanisms (16-19) are provided in transmitting routes from the pinion gears (10, 11) to an output shaft (1), thereby rotating the output shaft (1) in the same direction. With this arrangement, the output shaft (1) is rotated in the same direction while the circular arcuate gear (8) moves forward and backward. Furthermore, a rotary tool according to the present invention is adapted to utilize the above-described motion converting mechanism, and the grip portion (6) of a reciprocatingly rotating member is reciprocatingly rotated with respect to a lever portion (5) of a main body, so that an output gear (4) can be rotated in the same direction, thereby rotating an article to be rotated in the same direction. With this arrangement, bolts, screws and the like can be tightened or untightened. Furthermore, another motion converting mechanism according to the present invention uses a circular gear (8) as an input portion, and the output shaft (1) is rotated in the same direction even when the circular gear (8) is rotated in either direction. <IMAGE> <IMAGE> |
