Support structure for variable message signs

摘要

The support structure (1) has a first flat frame (3) which may be fixed to the roof of a tunnel and has a fastening mechanism (15). Pins on the frame are engaged by hooks on the top edge of the assembly of signal laminae (13). The flat frame has a front frame (9), side frames (7) and a rear frame (11). The assembly of signal laminae has a second flat support frame (5). Catches at the bottom may engage with further catches on the first frame to hold the road sign in a horizontal inactive position.