SHUTTER CURTAIN LIFTING PREVENTION STRUCTURE IN SHUTTER DEVICE

摘要

A shutter curtain lifting prevention structure capable of securing a crime prevention effect by preventing a shutter curtain keeping a fully closed state from being raised even if the shutter curtain is attempted to be forcibly raised from the lower side of a seat plate by using a tool such as a bar. A cutout recessed part (9) is integrally formed in the guide groove (8) of a guide rail (5) by horizontally cutting the indoor side-face part (7b) of a front surface (7) positioned near a floor surface (10) in the vertical direction. Thus, when the seat plate (6) of the shutter curtain (4) keeping the fully closed state is raised, an interlock part (3b) positioned just above the seat plate (6) and bent is locked to the cutout recessed part (9).