| 摘要 |
<P>PROBLEM TO BE SOLVED: To use an inexpensive laminated glass with a low heat-resistance temperature as a translucent cover of a lighting device for a tunnel. <P>SOLUTION: A laminated glass 9 is mounted as a translucent cover on an opening 3 to which light is emitted from a lamp 16 held by a lamp socket 12. A heat insulating body 14 is provided in a position covering the heat generating area near a base 17 of the lamp 16, between the lamp 16 and the laminated glass 9. While the heat generation from the heat generating area near the base 17 can be highest when the lamp 16 is turned on, the heat is insulated by the heat insulating body 14, and the reduced heat is transmitted to the laminated glass 9, thus suppressing the temperature increase of the laminated glass 9. Accordingly, even if the adhesive layer used for the laminated glass 9 is inexpensive and has a low heat-resistance temperature, discoloration or deterioration in strength of the adhesive layer can be prevented, enabling the inexpensive laminated glass 9 using the inexpensive adhesive layer to be used as the translucent cover to close the opening 3 of the lighting device for a tunnel. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
