| 摘要 |
PROBLEM TO BE SOLVED: To enhance sealing by completely eliminating peripheral and axial gaps between adjacent divided pieces and peripheral and axial gaps between adjacent brush pieces. SOLUTION: Axially opened notched parts 6 and 7 are provided in both end parts of a divided piece 5 in a peripheral direction, and the peripheral end part of a brush piece 9 is positioned in the notched parts 6 and 7. When the divided pieces 5 are combined, the end parts of the brush pieces 9 positioned in the notched parts 6 and 7 of the adjacent divided pieces 5 are overlapped with each other, and peripheral and axial gaps between the divided pieces 5 and peripheral and axial gaps between the brush pieces 9 are sealed. During use, the end part of the brush piece 9 of an upstream side is pressed toward the end part of the brush piece 9 of a downstream side, and sealing between both is further enhanced. |
