US 7,575,100 B2
Elevator apparatus that detects an accurate running speed of an elevator car that operates over speed
Takuo Kugiya, Tokyo (Japan); Takaharu Ueda, Tokyo (Japan); Ken-Ichi Okamoto, Tokyo (Japan); and Tatsuo Matsuoka, Tokyo (Japan)
Assigned to Mitsubishi Denki Kabushiki Kaisha, Chiyoda-Ku, Tokyo (Japan)
Filed on Oct. 06, 2008, as Appl. No. 12/285,467.
Application 12/285467 is a division of application No. 10/538307, granted, now 7,448,472, previously published as PCT/JP03/14923, filed on Nov. 21, 2003.
Prior Publication US 2009/0101450 A1, Apr. 23, 2009
Int. Cl. B66B 5/04 (2006.01)
U.S. Cl. 187—305  [187/295; 187/293] 11 Claims
OG exemplary drawing
 
1. An elevator apparatus, comprising:
a car for ascending and descending in a hoistway;
a controller for controlling the ascending and descending of the car;
braking means for braking the car;
a car speed detector for detecting a running speed of the car;
a car position detector for detecting a position of the car; and
an over speed monitoring portion for receiving information from the car speed detector and the car position detector, comparing an over speed set correspondingly to the position of the car with the running speed of the car, and actuating the braking means when the running speed of the car reaches the over speed,
wherein the over speed monitoring portion sets the over speed to be higher than a running speed pattern obtained when the car runs normally from one terminal landing to the other terminal landing by a predetermined margin.