| 摘要 |
The invention relates to a chipper ( 1 ) bed knife ( 2 ) attached detachably to the chipper frame ( 3 ), the chipper ( 1 ) having a chipper disc ( 5 ) supported on its shaft ( 4 ), which shaft is fitted rotatably to the chipper frame ( 3 ), the chipper disc ( 5 ) comprising a number of knives ( 6 ) arranged to pass the knife edge ( 7 ) of the bed knife ( 2 ) at a distance corresponding to the required knife clearance (v), when the chipper disc ( 5 ) is rotating. The bed knife ( 2 ) also has a second knife edge ( 7' ), the said knife edges ( 7, 7' ) being arranged at a distance from each other in the direction of movement (A) of the chipper disc ( 5 ) knives ( 6 ). A groove ( 8 ) is formed in the bed knife ( 2 ) between the said knife edges ( 7, 7' ).
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