Operation lever turn-stop and unlocking mechanisms in lever device

摘要

A lever device in which a band (12) disposed on one side of an operation handle shaft (1) and a mount stay (4) disposed on the other side of the handle shaft for supporting an operation lever (3) are clamped and fixed with each other through clamp bolts (16), and in which a drum (11c) of an operation mechanism for controlling wire (11) is mounted on a lower portion of the operation lever. In the lever device, a concave portion (17) is formed in an inner surface of either one of the band and stay contacting with a surface of the handle shaft, and a turn-stop member (18, 18A, 18B) having a protruding portion (19) capable of biting into the surface of the handle shaft is fitted in the concave portion whereby an operation lever turn-stop mechanism is constituted so that the operation lever can be effectively prevented from turning even if the stay is not so strongly tightened, and a lock lever (10) for holding the operation lever in an upward turned state is mounted on the operation lever so as to be operated up/down turnably around the drum, a front portion (10b) of the lock lever is urged to turn upward by means of a spring (27) so that the front portion of the lock lever engages with an engagement portion (23) formed in the stay when the operation lever is turned upward, and a finger placing portion (25) is formed at a rear portion of the lock lever so that the finger placing portion projects toward a side of the handle shaft when the lock lever engages with the engagement portion and so that the front portion of the lock lever is disengaged from the engagement portion of the stay when the finger placing portion is pressed against the spring force so that the lock lever is turned downward whereby an operation lever unlock mechanism is constituted so that the operation lock can be unlocked rapidly in case of emergency or the like. <IMAGE>