Abstract: In an exhaust gas purification system with a continuous regeneration type DPF device, when a collecting quantity (?Pm) of PM exceeds a predetermined judgment collecting quantity (?Pm0), a number-of-regeneration-times coefficient (Rc) serving as an index of the number of regeneration times to a travel distance is compared with a predetermined judgment coefficient value (R0). When the number-of-regeneration-times coefficient (Rc) is smaller than the predetermined judgment coefficient value (R0), automatic traveling regeneration is performed. If this condition is not met, manual regeneration is performed.

Abstract: In an exhaust gas purification system (1) provided with a continuous regeneration type DPF device (13) and DPF control means (30C), when a collecting quantity (?Pm) of PM exceeds the predetermined judgment collecting quantity (?Pm0), a number-of-regeneration-times coefficient (Rc) serving as an index of the number of regeneration times to a travel distance is compared with a predetermined judgment coefficient value (R0). When the number-of-regeneration-times coefficient (Rc) is smaller than the predetermined judgment coefficient value (R0), automatic traveling regeneration is performed and when the number-of-regeneration-times coefficient (Rc) is equal to or more than the predetermined judgment coefficient value (R0), manual regeneration is performed.

Abstract: A printing machine comprising a conveyance path for conveying printing paper, and a position sensor for detecting the end of the printing paper passing through the conveyance path. Printing is carried out at a prescribed position on the printing paper, in accordance with this position sensor. The position sensor is located movably in a transverse direction to the conveyance path. It can be withdrawn to a position where it poses no obstacle when setting printing paper in the conveyance path.