| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilating fan capable of reduction of the cost by the use of a standard poligonal knut. SOLUTION: There is provided a reception portion 10 on an upper side frame of a frame shaped frame 1 that forms a ventilating fan body 3, in which reception section an accommodation section 9 having left and right openings, and there is provided in the reception section 10 a through-hole 13 through while there is inserted a fan bolt i2 threaded with a square nut 11 that is inserted and accommodated from the openings of the reception section 10. There is engaged with and mounted on a ventilating fan mounting hole 16 a tip end of the bolt 12 screwed with the square nut 11 freely to go forward and backward. Hereby, the standard square nut 11 is usable and is easily held because it is not fixed with the engagement, so that the cost thereof is reduced. |
