ANTI-DROP SAFETY DEVICE AGAINST TORSION SPRING BREAK IN ROLLING SHUTTER

摘要

This invention was developed to be used in civil or industrial rolling shutter With the purpose solution, it's possible to stop the falling of rolling shutter when the spring of enslavement, at motor o manual mechanism, breaks. In reality the device is made by a square mechanical shaft that may rotate few degrees respect an octagonal rotating tube, according with a mechanical device, in two torsion springs, one with a great torque and the other with a little opposite torque, in two gears, one rotating, the other fixed that may fit together, in one compressing spring and some other parts for mechanical connection. In normal working the powerful spring torque goes over the opposite little one obliging the devise to have a precarious position, however stable. In this position the gears are far each other and the octagonal tube may rotate winding or rewinding the rolling shutter. When the enslavement spring, which has the bigger torque, breaks, the device is obliged to move immediately toward a more stable position in which the rotating gear is strongly fit with the fixed gear. This position stops any rotation of the rotating gear and consequently the fall of the gate.