A method for locking industrial sectional doors has sensor operated bolts in door mounted actuators which slide to engage holes in the roller track rails

摘要

In the case of a vertically moving sectional door (1) having slats (1a-1d), one or more of which carry actuators (9) by which bolts (11) are electromagnetically or hydraulically pushed into holes in the guide rails (3) at certain positions to holding the door securely in an intermediate opening position.