| 摘要 |
PROBLEM TO BE SOLVED: To provide a mono-rake dust collector constituted so that a raking portion does not escape from a screen surface, an elevating/lowering guide is not required to be extended below the water surface and the dust in the water is never entwined around the elevating/lowering guide. SOLUTION: A rake 3 is provided with right-and-left arms 32 for supporting the raking portion 31 and guide rollers 30 each of which is fit to the base end part of each of the arms 32. The central portions in the length of the arms 32 are supported respectively by right-and-left chains 60 of an elevating/lowering mechanism 4 to be rotated freely. The rollers 30 are supported respectively by the right-and-left elevating/lowering guides 7 to be slid freely. The rake 3 is formed so that the portion 31 is pressed to a screen 2 at the position lower than the positions of the arms 32 supported by the chains 60 and the rollers 30 are engaged with the guides 7 at the positions higher than the positions of the arms 32 supported by the chains 60. COPYRIGHT: (C)2004,JPO
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