ROTATION LOCK MECHANISM FOR GEAR

摘要

The purpose of the present invention is to enable a gear to be locked for rotation in both the forward and reverse directions and to facilitate the unlocking. This rotation lock mechanism for a gear is provided with: a first insertion member (31) inserted into a tooth groove (25m) of a gear (25) and pressing on a tooth flank (25e) of a tooth (25z); a second insertion member (32) inserted into another tooth groove (25m) and pressing on a tooth flank (25e) of another tooth (25z); and an actuator configured so as to insert the first insertion member (31) and the second insertion member (32) into respective corresponding gear grooves (25m) and to remove the first insertion member (31) and the second insertion member (32) therefrom. The rotation in the forward direction is prohibited when the first insertion member (31) presses on the tooth flank (25e) of the tooth (25z), and the reverse rotation is prohibited when the second insertion member (32) presses on the tooth flank (25e) of the another tooth (25z).