| 摘要 |
PURPOSE:To easily further surely detect presence of the material residue, by equipping a grasp pawl which closely supports the side part of a very fine bar material throughout a wide range. CONSTITUTION:A point end part 42 of a detector piece 40 in the point end of a detecting slider member is not contacted to but positioned in a very approximate place to the outside part 44 of a grasp pawl 18. Then the material residue 16 in a very approximate positon to the part 44 of the pawl 18 is pressed by the part 42 of the piece 40, and bending moment aplied to the residue 16 becomes equal almost to zero, while the residue 16, even if a very fine bar material, is never forcibly curved by the piece 40, and presence of the residue 16 is surely detected. |
