Elevator governor and elevator device

An elevator governor which has a governor rope which performs circulating movement in synchronization with ascent and descent of a car disposed in a shaft of an elevator in such a manner as to be capable of ascending and descending and a sheave on which the governor rope is wound and which rotates in synchronization with the ascent and descent of the car via the governor rope, and constrains the circulating movement of the governor rope in a case when the descent speed of the car has reached a predetermined speed, comprising:

• a pendulum which is provided in the sheave, rotates integrally with the sheave, and moves to a radially outer side of the sheave according to the rotational speed of the sheave;
• rope constraining means which constrains the circulating movement of the governor rope when the pendulum has moved over a moving distance which is not less than a predetermined moving distance to the radially outer side of the sheave when the car is descending;
• a cam contact portion which is provided in the pendulum and moves integrally with the pendulum with respect to the sheave;
• a cam which is provided in such a manner as to be capable of moving between a protruding position where the cam can come into contact with the cam contact portion and a retracted position where the cam cannot come into contact with the cam contact portion;
• and
• cam moving means which moves the cam from the retracted position to the protruding position when the car door is open,
• wherein the cam has a cam surface which is formed in such a manner that, in the case where the cam is in the protruding position, the cam surface guides the cam contact portion of the pendulum which rotates integrally with the sheave in the direction in which the car descends, and moves the pendulum to the radially outer side of the sheave over a moving distance which is not less than the predetermined moving distance, and
• wherein the cam moving means moves the cam to the protruding position from the direction in which the cam contact portion and the pendulum are not moved to the radially outer side of the sheave in the process of movement of the cam.