| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an angle adjustment method realizing accuracy improvement of an installation angle of a lighting fixture in a tunnel and simplification of an angle adjustment work. <P>SOLUTION: A laser pointer is installed on a lighting fixture side and irradiation points of illumination are directly irradiated on the road surface, and by maintaining the positions of the irradiated points within a prescribed control reference value, adjustment of the center of an optical axis of the lighting fixture is made. The laser pointer is installed at right angles at the central position of the optical axis of the front glass of the lighting fixture, and a precise reference point control is carried out by using a vertical display function of the laser pointer. Further, by utilizing a CAD or the like, shapes of tunnel cross sections are analyzed at least by several tens of cross sections or more, and based on the analysis result, the number of types of the installation fittings of the lighting fixture suitable for the wall shapes are consolidated and manufactured in several kinds, thereby enabling simplification of control and accuracy improvement in angle adjustment. <P>COPYRIGHT: (C)2013,JPO&INPIT |
