| 摘要 |
PURPOSE:To obtain the titled highly durable shoe by providing the main shoe body and a ceramic rubbing piece, and detaining the rubbing piece on the rubbing surface between the main shoe body and the piece by a detaining means. CONSTITUTION:A bucket 9 is rotated through chains 7 and 8, the deposit on the bottom surface 2 of a water layer 1 is collected in the bucket 9, the deposit is lifted, turned over, and discharged, and the bucket 9 is lengthwise moved at the upper part of the water layer 1 and then descends. In this case, the bucket 9 is guided by the shoes 14 and 14 provided at the upper and lower parts of the bucket 9 along the lower rail 10 and the upper rail 11. Since the ceramic rubbing piece is preset on he rubbing surface of the shoe 14, the rubbing piece is mainly brought into contact with the rails 10 and 11 when the rubbing surface of the main shoe body is eroded, and the load of the rubbing surface of the main shoe body is reduced.
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