| 摘要 |
Scraping plates include: a first scraping plate 11 attached to chains 10, with an end surface 11c′ thereof facing a receiving plate 14 being deviated from an attachment point c′ where the first scraping plate 11 is attached to the chains 10, by a distance L1 to an opposite side of an advance direction a of the chains 10; and a second scraping plate 12 attached to the chains 10, with an end surface 12c′ thereof facing the receiving plate 14 being deviated from an attachment point d′ where the second scraping plate 12 is attached to the chains 10, by a distance L2 smaller than the distance L1 of the first scraping plate 11 to the opposite side of the advance direction a. |
