| 摘要 |
<p>PROBLEM TO BE SOLVED: To revolve a movable roof section as needed, by reducing maintenance work for a rail.SOLUTION: An openable/closable roof structure includes: a stationary roof section (11) that partially covers an area above facilities and that assumes a semicircular shape in a plan view; a rail (13) that is laid around the facilities; and a movable roof section (12) that revolves on the rail between a closing position to cover the rest of the area above the facilities and an opening position to overlap the stationary roof section and that assumes a semicircular shape in a plan view. The entire perimeter of a rail track is covered with a ring (14) revolving integrally with the movable roof section.</p> |
