Paper ejecting device with swinging protruding members

A paper ejecting device, comprising:

• a body for sucking a sheet of paper on a paper transport surface;
• jumping boards having paper transport surfaces and being provided on both sides of the body along a paper transport direction;
• a plurality of protruding members disposed so as to independently swing up and down around an axis of a swinging shaft for supporting one ends of the protruding members;
• swinging devices for swingingly driving the protruding members from a position where the protruding members have top portions composing other ends of the protruding members and protruding upward to a predetermined height from the paper transport surface to a position where the protruding members retract below the paper transport surface;
• and
• a controller for controlling the swinging devices and combining swinging positions of the protruding members according to one of the kind of paper and a bias of a surface print rate of the sheet;
• wherein each of the protruding members integrally and individually has a suction box, a pair of a drive roller and a driven roller disposed at the front and rear of the suction box, a paper suction transport belt individually associated with the suction box and looped over the rollers at the front and rear of the suction box, and a plurality of holes formed on the paper suction transport belt, whereby a printed sheet is transported on the upper surface of the paper suction transport belt by sucking air through the plurality of holes.