Medium processing device and recording system

Abstract

A medium processing device includes a processing unit performing processing on a medium, a processing tray on which the medium is placed, a discharge roller pair configured to discharge the medium, a feeding unit configured to feed the medium to the processing tray and the discharge roller pair, and a curvature applying unit configured to apply curvature to the medium along a width direction intersecting a conveyance direction. The discharge roller pair includes a first roller and a second roller. The second roller is displaceable between a first state where the second roller can nip the medium with the first roller, and a second state where the second roller is more separated from the first roller. The curvature applying unit is in a curvature applying state when the second roller is in the second state, and in a retracted state when the second roller is in the first state.

What is claimed is: 
     
         1 . A medium processing device comprising:
 a processing unit configured to perform processing on a medium;   a processing tray on which the medium to be processed by the processing unit is placed;   a discharge roller pair configured to discharge the medium from the processing tray;   a feeding unit configured to be able to feed the medium to the processing tray and the discharge roller pair; and   a curvature applying unit configured to apply curvature along a width direction intersecting a conveyance direction of the medium, to the medium fed to the processing tray by the feeding unit, wherein   the discharge roller pair includes:   a first roller that abuts on a first surface of the medium; and   a second roller that abuts on a second surface opposite to the first surface of the medium, and   the second roller is displaceable between a first state where the second roller nip the medium with the first roller between the second roller and the first roller, and a second state where the second roller is more separated from the first roller than in the first state, and   the curvature applying unit is   in a curvature applying state of applying the curvature to the medium when the second roller is in the second state, and   in a retracted state of being retracted further from the medium than in the curvature applying state, when the second roller is in the first state.   
     
     
         2 . The medium processing device according to  claim 1 , further comprising:
 a linking unit configured to link a displacement of the second roller into the first state and the second state with a displacement of the curvature applying unit into the retracted state and the curvature applying state.   
     
     
         3 . The medium processing device according to  claim 2 , wherein
 the linking unit includes:   an energizing unit configured to energize the curvature applying unit so as to be in the retracted state;   a first displacement unit configured to displace the curvature applying unit so as to be in the curvature applying state against an energizing force of the energizing unit; and   a second displacement unit configured to displace the second roller into the first state and the second state, and   the first displacement unit displaces the curvature applying unit as the second displacement unit is displaced.   
     
     
         4 . The medium processing device according to  claim 3 , wherein
 the curvature applying unit includes:   an abutting part configured to be able to abut on the medium by swinging; and   a support shaft configured to support the abutting part in a swingable manner, and   the first displacement unit rotates the support shaft.   
     
     
         5 . The medium processing device according to  claim 4 , wherein
 the feeding unit is a rotating body provided in the second displacement unit,   the second displacement unit is rotationally movable about a rotation center of the rotating body,   the rotation center is located between the first displacement unit and the discharge roller pair in the conveyance direction,   the abutting part of the curvature applying unit swings about a swing center, and   the swing center is located between the first displacement unit and the abutting part in the conveyance direction.   
     
     
         6 . The medium processing device according to  claim 3 , wherein
 the curvature applying unit includes:   an abutting part configured to be able to abut on the medium by swinging; and   a pressing part configured to press the abutting part toward the medium.   
     
     
         7 . The medium processing device according to  claim 6 , wherein
 an energizing force of the energizing unit is larger than a pressing force of the pressing part.   
     
     
         8 . The medium processing device according to  claim 6 , wherein
 a moment acting on the curvature applying unit by the energizing force of the energizing unit is larger than a moment acting on the curvature applying unit by the pressing force of the pressing part.   
     
     
         9 . The medium processing device according to  claim 6 , wherein
 the curvature applying unit includes a support shaft that supports the abutting part in a swingable manner, and   the abutting part engages with the support shaft and swings as the support shaft rotates.   
     
     
         10 . The medium processing device according to  claim 3 , wherein
 the curvature applying unit includes:   an abutting part configured to be able to abut on the medium by swinging;   a support shaft configured to support the abutting part in a swingable manner; and   a displacement member configured to be displaceable between a support position for supporting the abutting part from below and a lowering position for lowering the abutting part, and   the first displacement unit displaces the displacement member.   
     
     
         11 . The medium processing device according to  claim 10 , wherein
 the displacement member is slidable between the support position and the lowering position, and engages with the support shaft and slides as the support shaft rotates.   
     
     
         12 . The medium processing device according to  claim 10 , wherein
 the first displacement unit displaces the displacement member via a gear train.   
     
     
         13 . The medium processing device according to  claim 3 , wherein
 the first displacement unit includes a rotating member at a contact position with the second displacement unit.   
     
     
         14 . The medium processing device according to  claim 1 , wherein
 a conveyance unit configured to convey the medium in the conveyance direction is not provided between the feeding unit and the discharge roller pair in the conveyance direction.   
     
     
         15 . The medium processing device according to  claim 1 , wherein
 the first surface is a surface to be placed on the processing tray.   
     
     
         16 . The medium processing device according to  claim 1 , further comprising:
 a control unit configured to control switching of the state of the second roller, wherein   the control unit is configured to be able to switch between   a first mode in which the medium is fed and placed on the processing tray by the feeding unit in a state where the second roller is in the second state, then the second roller is switched from the second state to the first state, and the medium placed on the processing tray is discharged by the discharge roller pair, and   a second mode in which the medium is discharged without being placed on the processing tray by the feeding unit and the discharge roller pair while the first state of the second roller is maintained.   
     
     
         17 . The medium processing device according to  claim 1 , wherein
 the curvature applying unit is configured to be able to be in an intermediate state between the retracted state and the curvature applying state in addition to the curvature applying state, when the second roller is in the second state.   
     
     
         18 . The medium processing device according to  claim 1 , further comprising:
 a displacement unit configured to displace the second roller into the first state and the second state and displace the curvature applying unit into the retracted state and the curvature applying state; and   a control unit configured to control the displacement unit, wherein   the control unit controls the displacement unit such that   the curvature applying unit is in the retracted state when the second roller is in the first state, and   the curvature applying unit is in the curvature applying state when the second roller is in the second state.   
     
     
         19 . A recording system comprising:
 a recording device configured to perform recording on a medium; and   the medium processing device according to  claim 1 , configured to perform the processing on the medium on which recording is performed by the recording device.