| 摘要 |
In order to maintain the dust collection efficiency, it comprises: a filtration chamber 20 which has an carbon fiber outlet 10 from which carbon fibers are discharged and to which a gas including the carbon fibers is introduced; a flexible cylindrical filter cloth 22 one end of which is suspended in the filtration chamber and which collects the carbon fibers in the gas in order to clean up the gas; and a pathway 30 for cleaned-up gas which is connected to the filtration chamber 20 through the cylindrical filter cloth 22 and which allows the cleaned-up gas to pass through it. Further, to the cylindrical filter cloth 22, a bottom plate 23 which is provided on the other end of the cylindrical filter cloth; ring supporting members 24 which are fixed to the cylindrical filter cloth and which are mutually separated with prescribed intervals in the axial direction of the cylindrical filter cloth; and a drive mechanism 40 which drives the bottom plate 23 along the axial direction of the cylindrical filter cloth 22; are provided in order that the cylindrical filter cloth 22 is freely expanded and contracted as bellows.
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