Paper output mechanism

Abstract

A paper output mechanism includes: a roller pair composed of a first roller and a second roller travelable around the first roller and configured, when the second roller is in a first position, to output a piece of paper to a paper placement part by pinching the piece of paper between the first and second rollers and driving at least one of the first and second rollers into rotation with an actuator; and a roller position changing mechanism for switching the second roller between the first position and a second position located closer to the paper output side than the first position. When the trailing edge of the piece of paper is sent out to the paper placement part, the roller position changing mechanism changes the second roller from the first position to the second position.

1 . A paper output mechanism, disposed at the terminal end of a paper conveyance path, for outputting a piece of paper conveyed to the terminal end of the paper conveyance path from the terminal end thereof to a paper placement part disposed below the terminal end of the paper conveyance path, the paper output mechanism comprising:
 a roller pair composed of a first roller and a second roller travelable around the first roller and configured, when the second roller is in a first position on a traveling path of the second roller, to output the piece of paper to the paper placement part by pinching the piece of paper between the first and second rollers and driving at least one of the first and second rollers into rotation with an actuator; and   a roller position changing mechanism for switching the second roller between the first position and a second position located on the traveling path of the second roller and closer to the paper output side than the first position, the roller position changing mechanism being configured, when the first roller and the second roller in the first position send out the trailing edge of the piece of paper to the paper placement part in the course of output of the piece of paper to the paper placement part, to change the second roller from the first position to the second position.   
   
   
       2 . The paper output mechanism of  claim 1 , wherein
 the first position is a position in which the axis of rotation of the first roller is located closer to the paper output side than the axis of rotation of the second roller, and   the second position is a position in which the axis of rotation of the second roller is located closer to the paper output side than the axis of rotation of the first roller and the pinch of the piece of paper between the first and second rollers is released.   
   
   
       3 . The paper output mechanism of  claim 1 , wherein when the first roller and the second roller in the first position send out the trailing edge of the piece of paper to the paper placement part in the course of output of the piece of paper to the paper placement part, the rotational driving speed of the roller driven into rotation by the actuator is changed to higher side. 
   
   
       4 . The paper output mechanism of  claim 1 , wherein the roller pair is disposed at the terminal end of the paper conveyance path provided in a printer body and in the vicinity of a paper output port in the printer body.