To simply conduct wiring work or installing work by eliminating necessity of a frame installing work of a blower unit in a ceiling.
Upper and lower base plates formed in a square shape having peripheries matching to a ceiling opening 7 are connected to upper and lower ends of a wind tunnel 9 containing a fan. An L-shaped fitting 12 for forming a base plate flange is fixed to one side of the lower plate 11, while stepwise fittings 13 formed of three surfaces bent substantially perpendicularly to opposed sides are disposed movably at the flange position and rising position to constitute a blower unit 6. The upper plate 10 is inserted into the opening 7 and rotated to be temporarily clamped. The fitment 12 is engaged with an edge of the opening 7, and the fittings 13 are fixed to the flange position, and thus the unit 6 is installed in the opening 7.
NAMATAME TATSUO
NAKAYAMA TOSHIO
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