| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical grating which has no cold sense, which can be sufficiently and visually recognized even under dim light, and which can prevent a stumbling accident.SOLUTION: A long member A is constituted by assembling a long translucent-transparent main resin bar cover 1 with a T-shaped cross-section groove, a long main resin bar 3 which is fitted into the groove and which has a T-shaped cross section, and a luminous tape 2 which is arranged in such a manner as to be positioned on the T-shaped top surface of the main resin bar 3, when the main bar is fitted into the groove. The many long members A are fixed at each predetermined mutual interval and in parallel with one another by means of a plurality of cross bars which are arranged at each predetermined interval in the longitudinal direction of the main resin bar 3. |
