Funnel and guide rail for a rolling shutter

摘要

The device (10) has an engagement unit on an upper end of guide rail (6). Front and rear guide walls extend from a bottom side of the device. One of the walls has a limit stop (17) retractable between an active position in which the stop is engaged with a complementary stop (18) provided with a blade of apron to prevent the engagement and disengagement of the blade and a retracted position to allow engagement and disengagement of the blade. The rail constitutes a locking unit to lock the limit stop in the active position during a complete engagement position of the device in the rail. An independent claim is also included for a method for engagement or disengagement of blade of apron.