| 摘要 |
<p>PROBLEM TO BE SOLVED: To divide a canopy for a vertical shaft into two or more members, carry it to a mounting field, and enable it to be safely mounted to the vertical shaft without a worker working in the inside of the vertical shaft.SOLUTION: A step of mounting a frame 10 to an upper end of an assembled liner plate and a step of mounting central beam members 21L, 21R and beam members 25, 28 along with central panel members 41A, 41B to the frame 10 are passed through. Thereby, the central panel members 41A, 41B can be safely mounted in the central part of the upper end opening part of the vertical shaft, without requiring the work in the inside of the vertical shaft and the work in the high place scaffolding. Then, peripheral panel member 42A, 42B, 42C ... can safely be mounted from the outside of the vertical shaft.</p> |
