| 摘要 |
PROBLEM TO BE SOLVED: To provide a hook ceiling capable of securing the brightness at the time of power failure. SOLUTION: The hook ceiling 1 is provided with a plurality of power source connection terminals 2a provided at a unit body 11 to which power-feeding lines of an alternating-current power source are connected from an installation face side, hook blade receptors 22 each arranged inside the unit body 11 at positions corresponding to hook blade insertion holes 19 fitted inside the unit body 11 for being hooked and holding hook blades 41 of a hook cap 40 inserted from one end part of the hook blade insertion holes 19 when they move toward the other end, an AC-DC conversion part 4 converting an alternating-current power inputted through the power source connection terminals 2a into direct-current power and supplying it to the hook blade receptors 22, a power failure detecting circuit 5 detecting power failure of the alternating-current power source, and a control circuit 10 for lighting direct-current devices 102, 102' of a lighting fixture type connected to the hook blade receptors 22 with a secondary battery 9 as a power source. COPYRIGHT: (C)2009,JPO&INPIT
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