Media transport apparatus and image forming apparatus

Abstract

To inhibit damage to a medium in a structure in which medium inclination correction is performed using a transport speed difference by independently driving two transport members disposed away from each other in a width direction of the medium, compared with a case where the medium inclination correction is performed with the medium nipped by a medium transport member on an upstream or downstream side of the two transport members.SOLUTION: A medium transport device include: an inclination correction unit (21) which corrects an inclination of a medium (S) by causing a difference in the transport of the medium (S) between one inclination correction member (21a) and the other inclination correction member (21b); and a pair of medium transport members (11a, 11b) disposed on a downstream side of the inclination correction unit (21). The medium transport members (11a, 11b) include a medium transport part (11) being movable between a transport position where the medium transport part (11) nips and transports the medium (S) and a release position where the nipped medium (S) is released. During correction of the inclination of the medium (S) by the inclination correction unit (21), the medium transport part (11) is moved to the release position.SELECTED DRAWING: Figure 6

Claims

1. A tilt correction unit has two tilt correction members that are spaced apart in the width direction of the medium, each tilt correction member can be driven individually during medium transport, and corrects the tilt of the medium with respect to the transport direction of the medium by creating a difference in the transport of the medium between one tilt correction member and the other tilt correction member. A media transport unit that transports a medium, positioned downstream of the tilt correction unit with respect to the medium transport direction, having a pair of media transport members positioned to sandwich the medium in the thickness direction of the medium, the media transport members being movable between a transport position for transporting the medium and a release position for releasing the sandwiching of the medium, A detection unit for detecting the degree of inclination of the aforementioned medium, If the magnitude of the tilt of the medium detected by the detection unit reaches a predetermined magnitude, the medium transport unit moves to the release position before the front end of the medium in the transport direction reaches the medium transport unit. Equipped with, During the period in which the tilt correction unit corrects the tilt of the medium, the medium transport unit is moved to the release position. The media transport unit holds the media in the transport position without moving it to the release position if the type of media is a predetermined type of paper that is easy to correct and the degree of tilt of the media detected by the detection unit does not reach a predetermined degree. A media transport device characterized by the following features.

2. By changing the transport speed of the medium using one of the tilt correction members and the other tilt correction member, a difference is created in the transport of the medium. The media transport device according to feature 1.

3. A detection unit for detecting the degree of inclination of the aforementioned medium, Equipped with, The transport speed is changed according to the degree of inclination of the medium detected by the detection unit. The media transport device according to feature 2.

4. By changing the timing at which the transport speed of the medium is changed by one of the tilt correction members and the other tilt correction member, a difference is created in the transport of the medium. A media transport device according to any one of the features 1 to 3.

5. A detection unit for detecting the degree of inclination of the aforementioned medium, Equipped with, The timing of changing the transport speed is altered according to the degree of inclination of the medium detected by the detection unit. The media transport device according to feature 4.

6. A media transport device according to any one of claims 1 to 5 for transporting a medium, Image forming means for forming an image on a medium, An image forming apparatus characterized by comprising the following:

Images