Medium ejection apparatus to change conveyance speed of ejection roller according to size of medium

Abstract

A medium ejection apparatus includes an ejection roller, an ejection tray to stack a medium ejected by the ejection roller, a drive mechanism to drive the ejection roller, a processor to detect a size of the medium ejected by the ejection roller, and control the drive mechanism to control a conveyance speed of the ejection roller when ejecting the medium. The processor changes the conveyance speed of the ejection roller from a first conveyance speed to a second conveyance speed lower than the first conveyance speed in the middle of ejecting the medium. The processor changes the second conveyance speed in accordance with the size of the medium.

What is claimed is: 
     
         1 . A medium ejection apparatus comprising:
 an ejection roller;   an ejection tray to stack a medium ejected by the ejection roller;   a drive mechanism to drive the ejection roller;   a processor to
 detect a size of the medium ejected by the ejection roller, and 
 control the drive mechanism to control a conveyance speed of the ejection roller when ejecting the medium, wherein 
   the processor changes the conveyance speed of the ejection roller from a first conveyance speed to a second conveyance speed lower than the first conveyance speed in the middle of ejecting the medium, and wherein   the processor changes the second conveyance speed in accordance with the size of the medium.   
     
     
         2 . The medium ejection apparatus according to  claim 1 , wherein a ratio of the first conveyance speed and the second conveyance speed is 3.0 or more and 5.6 or less. 
     
     
         3 . The medium ejection apparatus according to  claim 1 , wherein a region of the medium conveyed at the second conveyance speed by the ejection roller is larger than 2 mm and 5 mm or less from a back end of the medium. 
     
     
         4 . The medium ejection apparatus according to  claim 1 , further comprising a medium detection sensor located at an upstream side from the ejection roller in the medium conveyance direction, and wherein
 the processor changes the first conveyance speed to the second conveyance speed in accordance with detection of the medium by the medium detection sensor.   
     
     
         5 . A medium ejection method comprising:
 detecting a size of a medium ejected by an ejection roller to eject the medium to an ejection tray; and   controlling a drive mechanism to drive the ejection roller, to control a conveyance speed of the ejection roller when ejecting the medium, wherein   the conveyance speed of the ejection roller is changed from a first conveyance speed to a second conveyance speed lower than the first conveyance speed in the middle of ejecting the medium, and wherein   the second conveyance speed is changed in accordance with the size of the medium.   
     
     
         6 . The medium ejection method according to  claim 5 , wherein a ratio of the first conveyance speed and the second conveyance speed is 3.0 or more and 5.6 or less. 
     
     
         7 . The medium ejection method according to  claim 5 , wherein a region of the medium conveyed at the second conveyance speed by the ejection roller is larger than 2 mm and 5 mm or less from a back end of the medium. 
     
     
         8 . The medium ejection apparatus according to  claim 5 , wherein the first conveyance speed is changed to the second conveyance speed in accordance with detection of the medium by a medium detection sensor located at an upstream side from the ejection roller in the medium conveyance direction. 
     
     
         9 . A computer-readable, non-transitory medium storing a computer program, wherein the computer program causes a medium ejection apparatus including an ejection roller, an ejection tray to stack a medium ejected by the ejection roller, and a drive mechanism to drive the ejection roller to execute a process, the process comprising:
 detecting a size of a medium ejected by the ejection roller; and   controlling the drive mechanism to control a conveyance speed of the ejection roller when ejecting the medium, wherein   the conveyance speed of the ejection roller is changed from a first conveyance speed to a second conveyance speed lower than the first conveyance speed in the middle of ejecting the medium, and wherein   the second conveyance speed is changed in accordance with the size of the medium.   
     
     
         10 . The computer-readable, non-transitory medium according to  claim 9  wherein a ratio of the first conveyance speed and the second conveyance speed is 3.0 or more and 5.6 or less. 
     
     
         11 . The computer-readable, non-transitory medium according to  claim 9  wherein a region of the medium conveyed at the second conveyance speed by the ejection roller is larger than 2 mm and 5 mm or less from a back end of the medium. 
     
     
         12 . The computer-readable, non-transitory medium according to  claim 9  wherein
 the medium ejection apparatus further includes a medium detection sensor located at an upstream side from the ejection roller in the medium conveyance direction, and wherein 
 the first conveyance speed is changed to the second conveyance speed in accordance with detection of the medium by the medium detection sensor.