Tunnel casing for receiving roller shutter, has front and rear vertical walls that are parallel relative to each other, where rear vertical wall is connected with upper wall by detachable assembling screw

摘要

The casing (1) has front and rear vertical walls (2, 3) that are parallel relative to each other and respectively connected to an interior side and an exterior side, where ends of the casing are closed by side flanges (5). Lower edges of the walls and the flanges define a lower opening (6) closed by a detachable underside (12) permitting access to interior volume. The rear vertical wall is connected with an upper wall (4) by a detachable assembling screw, where the rear vertical wall and a rear part (4') of the upper wall are made of polyurethane foam.