DEVICE TO PROVIDE SAFE OPERATION OF LIFT

摘要

FIELD: passenger lifts with automatic door control drive; safety devices. SUBSTANCE: to solve the problem device is provided with series- connected independent sealed contacts of selecting sensors for each floor and free contacts of shaft door operated by shaft penetration control relays. Selecting sensor contacts are closed by magnets, and free contacts of shaft doors are closed in parallel by pairs on each floor and are open when shaft doors are closed. EFFECT: enhanced reliability of operation. 1 dwg