| 摘要 |
PROBLEM TO BE SOLVED: To simplify the form of a claw wheel by arranging rolling bodies protruded from a disc possessed by the claw wheel on the circumference of the disc so as to be uniformly distributed in the circumferential direction, and forming a plurality of recessed parts having the form conformed to the surface form of the rolling bodies and engaged with the protruding parts of the rolling bodies directly on a guide rail at equal intervals. SOLUTION: A claw wheel 10 has a disc, and rolling bodies 13 are arranged on the circumference of the disc so as to be uniformly distributed in the circumferential direction. The rolling bodies 13 are provided so as to protrude slightly from the circumference and both side end surfaces of the claw wheel 10. Each guide rail 1, 2 has a plurality of recessed parts 16, 17, 18, 19 having the form conformed to the surface form of the rolling bodies 13 at equal intervals so that the protruding parts of the rolling bodies 13 are fitted thereto. Since the recessed parts 16, 17, 18, 19 need not to be machined deeply, a weak position with the cross section is largely reduced to cause a breakage is never formed on the guide rail 1, 2. Thus, a fixing device is dispensed with, and a simple structure not requiring a lot of space can be provided. |
