INSTALLING STRUCTURE OF ASSEMBLY TYPE FAN

摘要

PROBLEM TO BE SOLVED: To provide the installing structure of an assembly type fan capable of precluding breakage of a fastening part between each fan blade and a metal disc. SOLUTION: Assembly type fan according to the invention is embodied in such a structure that a blade part and a spider part are formed in a single piece with each blade made of resin and the spider part is installed on the metal disc using rivet, bolt, etc., wherein the installation is made in such a way that the center across the plate thickness of the blade assembling structure part of the disc is located approximately identical to the line perpendicular to the rotational center and passing the center of gravity of the blade in order to reduce a twisting force generated in the structure part (fastening part) of the blade resulting from a moment generated by the centrifugal force generated following the rotation of the fan.