Patent ID: 7669697

Claim:
An elevator apparatus, comprising: a hoisting machine having a drive sheave and a hoisting machine brake for braking rotation of the drive sheave; a main rope wound around the drive sheave; a ascending/descending body suspended by the main rope to be raised and lowered by the hoisting machine; and a brake control device for controlling the hoisting machine brake, wherein: the brake control device has: a first brake control portion for stopping the ascending/descending body as an emergency measure by operating the hoisting machine brake when an abnormality is detected; a second brake control portion for reducing a braking force of the hoisting machine brake when a deceleration of the ascending/descending body becomes equal to or higher than a predetermined value during emergency braking operation of the hoisting machine brake; and a third brake control portion for monitoring a slip speed of the main rope with respect to the drive sheave during emergency braking operation of the hoisting machine brake and reducing a braking force of the hoisting machine brake when the slip speed of the main rope becomes equal to or higher than a predetermined value; and the second brake control portion and the third brake control portion control the hoisting machine brake independently of the first brake control portion.