Medium conveying apparatus

Abstract

A medium conveying apparatus includes a conveyance roller to convey a medium, a facing roller facing the conveyance roller, and a support to support and allow the facing roller to swing. The support has a swing center located upstream from a rotation center of the facing roller in a medium conveying direction, and the swing center is on the same side as the facing roller with respect to a nip between the conveyance roller and the facing roller.

What is claimed is: 
     
         1 . A medium conveying apparatus comprising: 
 a conveyance roller to convey a medium;   a facing roller facing the conveyance roller; and   a support to support and allow the facing roller to swing, wherein the support has a swing center located upstream from a rotation center of the facing roller in a medium conveying direction, and   the swing center is on the same side as the facing roller with respect to a nip between the conveyance roller and the facing roller.   
     
     
         2 . The medium conveying apparatus according to  claim 1 , 
       wherein the support is located inward of a side wall of a medium conveying path in a direction intersecting the medium conveying direction. 
     
     
         3 . The medium conveying apparatus according to  claim 1 , further comprising a separator to separate the medium, wherein the separator is located upstream from the conveyance roller and the facing roller in the medium conveying direction, and 
       the conveyance roller conveys the medium separated by the separator. 
     
     
         4 . The medium conveying apparatus according to  claim 1 , wherein  
       the facing roller includes a first facing roller and a second facing roller located at an interval in a direction intersecting the medium conveying direction, and 
       the support allows the first facing roller and the second facing roller to be positioned at positions different from each other in a swing direction of the support. 
     
     
         5 . The medium conveying apparatus according to  claim 4 , wherein the support includes an ann portion that supports, at multiple positions, a rotation shaft common to the first facing roller and the second facing roller, and the arm portion torsionally deforms. 
     
     
         6 . The medium conveying apparatus according to  claim 4 , wherein the support includes an arm portion that supports, at multiple positions, a rotation shaft of the first facing roller and a rotation shaft of the second facing roller, and 
       the arm portion torsionally deforms. 
     
     
         7 . The medium conveying apparatus according to  claim 4 , 
       wherein the support includes a first arm portion and a second arm portion that independently support the first facing roller and the second facing roller, respectively. 
     
     
         8 . The medium conveying apparatus according to  claim 7 , further comprising a universal joint that couples a rotation shaft of the first facing roller and a rotation shaft of the second facing roller. 
     
     
         9 . The medium conveying apparatus according to  claim 1 , wherein  
       the support includes a pressing portion, and 
       the pressing portion presses a central portion of a rotation shaft of the facing roller in a direction intersecting the medium conveying direction. 
     
     
         10 . The medium conveying apparatus according to  claim 1 , further comprising a first rotation shaft and a second rotation shaft, wherein the facing roller includes: 
 a first facing roller located on the first rotation shaft; and    a second facing roller located on the second rotation shaft and at an interval from the first facing roller in an intersecting direction intersecting the medium conveying direction, and   the support supports the first rotation shaft and the second rotation shaft such that a center-side end of the first rotation shaft and a center-side end of the second rotation shaft in the intersecting direction are located downstream in the medium conveying direction from the other end of the first rotation shaft and the other end of the second rotation shaft.