| 摘要 |
PROBLEM TO BE SOLVED: To promote durability by embedding a lighting lense for a solar cell and flood lifting lenses for light emission diodes into a device main body by insert molding. SOLUTION: One lighting lense 1, four flood lenses 2 and four assembling nuts are respectively arranged to required positions of a metal mold to make insert molding of them from a synthetic resin such as polycarbonate, etc., and a device main body 10 having assembling bolt insertion holes 11 in four corners is formed. A solar cell is stuck on the lower surface of the lighting lense 1, at the same time, light emission diodes are arranged in recesses provided to the lower parts of the flood lighting lenses 2, and solar cell, light emission diodes, battery, etc., are connected to them. Then, the device main body 10 is stored in a synthetic resin box body embedded in the ground, bolts are screwed in nuts from the assembling bolt insertion holes 11, and a road installation type road signal device is formed. |
