| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a centrifugal fan excellent in assembly workability and enabling to easily manufacture even a fan with a structure having a projection demonstrating noise suppression effect or the like formed on a blade surface. SOLUTION: A blade piece connecting means including a pair of blade piece connecting parts 16a, 16b continuously formed to make distance between the upper end parts and distance between lower end parts and connecting each upper end parts and each lower end parts of each blade piece 4a respectively and a fixing part 17 connecting the blade piece connecting parts 16a, 16b as one unit is provided. At least one of a blade connecting plate piece part 5a side and a rotary base plate piece part 3a side are fixed by a fixing means after gradually reducing interval between a plurality of the blade pieces 4a to form a cylinder body by sliding a guide pin 18 projectingly provided on an upper end part a lower end part of the fixing part 17 of the blade piece connecting means along a round shape guide groove 22. COPYRIGHT: (C)2006,JPO&NCIPI
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