| 摘要 |
A holding member 22 that holds a lateral end portion of a board 13 is attached to be movable between an upward warping correction position and a normal clamping position with respect to a guide rail 14 of a conveyor 12. When the holding member 22 is positioned at the upward warpage correction position, a distal end portion that is the lowest portion of a slope surface 23 of the holding member 22 is positioned at an inner side of the board 13 than the upper end of the lifting member 21. By nipping the lateral end of the board 13 between the distal end portion of the slope surface 23 and the upper end of the lifting member 21 in such a positional relationship, the board 13 is clamped in a state that the downward bending moment is applied to the board 13. In the normal clamping position, the distal end portion of the slope surface 23 of the holding member 22 is positioned directly above the lifting member 21. By nipping the lateral end portion of the board 13 between the distal end portion of the slope surface 23 and the upper end of the lifting member 21 in such a positional relationship, the board 13 is clamped in a state that the downward bending moment is not applied to the board 13. |
