| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding structure wherein, in a shutter curtain comprising a plurality of fireproof sheets, when the sheets are wound around a mount shaft, joint parts of the sheets can be prevented from swelling out so that the diameter thereof becomes larger. SOLUTION: A shutter curtain 10 comprises a plurality of fireproofing sheets 11a, 11b which are connected one to another, and the curtain 10 is wound around a winding shaft 12. And in the shaft 12, a pipe 16a is connected to a pipe 16b to form a recess 15 which is disposed in a manner corresponding to a joint part 13 of the curtain 10.
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