| 摘要 |
PROBLEM TO BE SOLVED: To prevent deformation of a support member for supporting a polishing member. SOLUTION: A polishing device is provided with a pair of first support shafts 32a, 32b extended in the perpendicular direction, this first support shaft 32a, 32b is rotatably supported. In the first support shaft 32a, 32b, respective two polishing members 33 to 36 are mounted, each polishing member 33 to 36 is arranged in a different position in the perpendicular direction. Each of these polishing members 33 to 36 is brought into contact so as to be over a vertical width total unit in a rear side surface of wooden material, this rear side surface is polished. Total friction force relating to a rear side surface of each polishing member 33 to 36 is partially received by a pair of the first support shafts 32a, 32b, so as to decrease the friction force acting in each of both the first support shafts 32a, 32b smaller than in the past. |
