Media transport device, control method, and control program

Abstract

To provide a medium conveyance device capable of more appropriately correcting a skew of a medium, a control method and a control program.SOLUTION: A medium conveyance device 100 includes: a plurality of feeding rollers 112 which are arranged at intervals in a direction perpendicular to a medium conveyance direction and each independently rotate and feed a medium; a plurality of brake rollers 113 which are arranged so as to face each of the plurality of feeding rollers; a rotation shaft 135e of the plurality of brake rollers; a plurality of torque limiters 139a and 139b separately provided between each of the plurality of brake rollers; a skew detection part 164 which detects a skew of a medium to be fed; and a control part 161 which corrects the skew of the medium by making peripheral speeds of the plurality of feeding rollers mutually different when the skew of the medium is detected by the skew detection part.SELECTED DRAWING: Figure 7

Claims

[Claim 1] A feeding roller for feeding a medium, An imaging unit that images the medium, A skew detection unit that detects the skew of the medium, The system includes a control unit that corrects the skew of the medium using the feeding roller when the skew detection unit detects skew in the medium, If skew is detected even after correcting the skew of the medium, the control unit changes the imaging range of the imaging unit. A media transport device characterized by the following features. [Claim 2] The feeding roller further includes a first sensor and a second sensor, which are spaced apart in a direction intersecting the medium transport direction, on the downstream side in the medium transport direction of the feeding roller. The medium transport device according to claim 1, wherein the skew detection unit detects the skew of the medium if the first sensor does not detect the medium within a predetermined time after the second sensor detects the medium. [Claim 3] The media transport device according to claim 2, wherein the control unit changes the imaging range if the first sensor does not detect the medium within a second predetermined time after the correction of the skew of the medium is started. [Claim 4] The third sensor is further disposed between the feeding roller and the imaging unit, The media transport device according to any one of claims 1 to 3, wherein if skew is detected in the control unit even after correcting the skew of the medium, the control unit causes the imaging unit to start imaging before the leading edge of the medium passes the position of the third sensor. [Claim 5] The media transport device according to claim 4, wherein the control unit terminates imaging in the imaging unit after a predetermined period has elapsed since the rear end of the medium passed the position of the third sensor if no skew occurs in the medium, and terminates imaging in the imaging unit after a second predetermined period, which is longer than the predetermined period, has elapsed since the rear end of the medium passed the position of the third sensor if skew is detected in the medium. [Claim 6] A medium is fed by a feeding roller, The imaging unit captures an image of the medium. Detect the skew of the medium, If skew of the medium is detected, the feed roller corrects the skew of the medium. If skew is detected even after correcting the skew of the aforementioned medium, the imaging range of the imaging unit is changed. A method for imaging media characterized by the following: [Claim 7] A control program for a media transport device having a feed roller for feeding a medium and an imaging unit for imaging a medium, Detect the skew of the medium, If skew of the medium is detected, the feed roller corrects the skew of the medium. If skew is detected even after correcting the skew of the aforementioned medium, the imaging range of the imaging unit is changed. A control program characterized by causing the media transport device to perform the above action.

Images