ELEVATOR SAFETY SYSTEM

摘要

The present invention further improves safety of a maintenance worker even when a safety device is invalidated during maintenance and recovery work. An elevator safety system has: an invalidation specification means (15) for specifying invalidation of any of a plurality of safety devices (14A) to (14N); an operation mode setting means (16) for setting an operation mode; a safe state determination processing unit (29) that gives invalidation permission while referring to a safe state parameter (35) defined by a safe state definition table on the basis of a signal from the invalidation specification means (15); and a safety device determination processing unit (30) that puts a brake on a passenger car. This safety device determination processing unit (30) has invalidation processing units (33A) to (33N) invalidating the safety device specified with the invalidation specification means (15) by an invalidation permission signal and a cancellation signal of the invalidation permission signal from the safe state determination processing unit (29).