| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear fitting structure capable of surely preventing a gear from falling off from a shaft when an axial stress is applied to the gear. SOLUTION: This gear fitting structure is provided with a first groove part 3a provided in the tip of a roller shaft 3, a pair of hole parts 3b, a rib 1f provided inside a roller shaft insertion hole 1c of the gear 1, engaged with the first groove part 3a of the roller shaft 3, and having a detent mechanism of the gear 1 relative to the roller shaft 3, and a pair of pin-shaped members 1d provided in the internal circumferential part of the trunk part 1b of the gear 1, inserted in the hole part 3b of the roller shaft 3, and having a detect mechanism of the gear 1 relative to the roller shaft 3. |
