Patent ID: 7886877

Claim:
A door device for an elevator, comprising: an elevator door having a landing door, and a car door displaceable with respect to the landing door between an engagement position at which the car door is engaged with the landing door and an open-away position located on a door-closing side with respect to the engagement position, the landing door and the car door being moved while being engaged with each other when the car door is located at the engagement position so that the landing door opens/closes a landing doorway; a locking device for performing an operation corresponding to a position of the car door with respect to the landing door when the landing doorway is fully closed by the landing door, locking the landing door while the car door is displaced from the engagement position to the open-away position, and unlocking the landing door while the car door is displaced from the open-away position to the engagement position; an unlock detecting device for detecting whether or not the landing door is unlocked; a door control device having an engagement completion time calculating portion for predicting an engagement completion time to a moment when the car door reaches the engagement position during a door-opening operation based on information from the unlock detecting device, a speed pattern generating portion for generating a speed pattern of the car door during the door-closing operation based on information from the engagement completion time calculating portion, and a speed control portion for controlling a speed of the car door according to the speed pattern.