| 摘要 |
PROBLEM TO BE SOLVED: To easily position a sprinkler in the vertical and horizontal directions. SOLUTION: A system ceiling structure is provided with a first pipe 9a fixed to the roof space, a second pipe 9b connected to a sprinkler head and fixed to lighting appliances, and a displaceable connection pipe 9c to connect the first pipe 9a and the second pipe 9b. A plurality of fitting parts to fix the sprinkler head side part of the second pipe 9b to the lighting appliance in a pierced state, are formed along one direction of the lighting appliances at every necessary pitch. And the lighting appliances are arranged to position the fitting parts in the crossing direction against the direction to which the fitting parts are formed and also position the mutual distances of the fitting parts within the range decided by the installation criterion of the sprinkler head. The connection pipe 9e is made of a flexible joint and the fitting parts are used for light electrical appliances. |
