INTERNALLY ILLUMINATED TYPE SIGN BOARD

摘要

PURPOSE:To keep well an indication effect of a sign board installed on a road and increase the durability. CONSTITUTION:An illuminator 2 is disposed in a box body 1 opened at the front face. A transparent protection plate 3 made of polycarbonate resin is detachably fixed to the front face of box body to close the opening. A translucent sheet 5 applied with a specified sign is spread at a specified distance from the transparent protection plate 3 to be oppositely arranged in the box body 1. A plurality of air holes 10 are provided at the corresponding sideface of box body between the transparent protection plate 3 and the translucent sheet 5 and covered with a filter 11.