Medium transport device and recording device

Abstract

A medium transport device 7 includes a separation roller unit 51 and a unit accommodation section 71 in which the separation roller unit 51 is detachably and attachably provided, wherein the separation roller unit 51 includes a separation roller 54 that is configured to contact a feed roller 52 for feeding a medium 3 and is provided rotatably around a shaft 56 and a roller holder 53 that is configured to hold the separation roller 54 and that has a guide section 55 for guiding the medium 3 toward the feed roller 52 the unit accommodation section 71 is provided with an adjustment section 72 for adjusting the position of the guide section 55 in a direction that intersects the axial direction of the shaft 56.

What is claimed is: 
     
         1 . A medium transport device comprising:
 a separation roller unit and   a unit accommodation section in which the separation roller unit is detachably and attachably provided, wherein   the separation roller unit includes
 a separation roller that is configured to contact a feed roller for feeding the medium and that is provided rotatably around a shaft and 
 a roller holder that is configured to hold the separation roller and that has a guide section for guiding the medium toward the feed roller and 
   the unit accommodation section is provided with an adjustment section for adjusting a position of the guide section in a direction that intersects an axial direction of the shaft.   
     
     
         2 . The medium transport device according to  claim 1 , wherein
 the adjustment section includes a placement surface at a position where the roller holder of the unit accommodation section is placed in a state where the separation roller unit is attached to the unit accommodation section and a spacer that is disposed on the placement surface and that adjusts the position of the guide section.   
     
     
         3 . The medium transport device according to  claim 1 , wherein
 the adjustment section is configured to adjust the position of the guide section by power of a power source.   
     
     
         4 . The medium transport device according to  claim 1 , wherein
 the adjustment section is provided with a cam member configured to adjust the guide section to at least two positions.   
     
     
         5 . The medium transport device according to  claim 1 , wherein
 the separation roller unit includes a first pushing member configured to elastically push the separation roller toward the feed roller.   
     
     
         6 . The medium transport device according to  claim 5 , wherein
 the first pushing member is a torsion coil spring provided along the axial direction,   one end section of the torsion coil spring is exposed to the outside of the separation roller unit, and   the separation roller unit includes a holding section configured to hold the one end section.   
     
     
         7 . The medium transport device according to  claim 1 , wherein
 the separation roller unit includes a first locking section that locks with a first locked section provided in the unit accommodation section and that is provided at both end sections of the separation roller unit in the axial direction and   the first locking section is detachable and attachable by being separated from the first locked section.   
     
     
         8 . The medium transport device according to  claim 7 , wherein
 the separation roller unit includes a second locking section that is configured to be locked with a second locked section provided in the unit accommodation section and that is for positioning the separation roller unit with respect to the unit accommodation section and   a position at which the second locking section and the second locked section are locked is positioned, with respect to the transport direction of the medium, at a position at which the first locking section and the first locked section are locked and upstream of the shaft.   
     
     
         9 . The medium transport device according to  claim 1 , wherein
 the adjustment section includes
 a second pushing member that is provided in the unit accommodation section and that is configured to elastically push the separation roller unit toward the feed roller and 
 a positioning section that is provided in the unit accommodation section and that is configured to stop and position, at a predetermined position, the separation roller unit pushed by the second pushing member, 
   the separation roller unit is configured to be displaceable in a direction that intersects the axial direction of the shaft by the second pushing member and the positioning section,   the feed roller is detachable from and attachable to a rotation shaft along the axial direction, and   the guide section overlaps with the feed roller in a direction that intersects the axial direction of the shaft.   
     
     
         10 . The medium transport device according to  claim 1 , wherein
 the separation roller unit is detachable and attachable along the transport direction of the medium at a nip position between the feed roller and the separation roller.   
     
     
         11 . A recording device comprising:
 the medium transport device according to  claim 1  and   a recording section configured to perform recording on a medium transported from the medium transport device.