| 摘要 |
PROBLEM TO BE SOLVED: To inhibit creep deformation of a resin gear without enlarging a gear reducer.SOLUTION: A second gear 60 and a spur gear 42 of a first gear 40 composing a gear train of the gear reducer 4B are made of resin. Flexible metal plates K1, K2 are integrally inserted and formed at an inside of each tooth 42A, 64. The metal plates K1, K2 are arranged with plate surface thereof oriented to a tooth surface of each tooth 42A, 64. Each teeth 42A, 64 meshing each other are supported by the metal plates K1, K2. Consequently, a support structure inhibiting creep deformation is provided. |
