| 摘要 |
PROBLEM TO BE SOLVED: To make a smoke exhaust function possible to operate when need arises even when a maintenance personnel cannot operate it in the case it has the smoke exhaust function and a sunlight collecting function. SOLUTION: This device 1 has a lower frame 2, an upper frame 3 which covers the lower frame 2 when it is descending, and an automatic opening/ closing device 4 which moves the upper frame 3 vertically. The upper frame 3 has two light collecting prisms 33a, 33b, a transparent cover which covers the prisms, rotational driving devices 34a, 34b which rotate the prisms, and a controller 35 which controls the rotational driving devices so as to rotate the prisms in a proper angle corresponding to the position of the sun, and a power supply such as a solar battery 36 which supplies electric power to the rotational driving device and the controller is placed in the transparent cover 31. The automatic opening/closing device 4 has X-arms 41, 42 and an elevating motor 46. The motor is started to form a smoke exhaust port by maintenance personnel's hand operation or automatic operation of the automatic operation device 4 based on a detected signal by a smoke detecting function K.
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