Recording medium transport device, and image forming apparatus

摘要

A recording medium transport device includes a connecting member that connects two transport roller pairs, and a drive switching section that is provided to one of the two transport roller pairs, and switches between a state in which a rotational drive force is transmitted between the two transport roller pairs via the connecting member and a state in which the rotational drive force is not transmitted between the two transport roller pairs. A controller of the recording medium transport device causes the drive switching section to switch from the state in which the rotational drive force is not transmitted between the two transport roller pairs to the state in which the rotational drive force is transmitted between the two transport roller pairs via the connecting member, when the rotational speed of at least one of the transport roller pairs falls outside a predetermined speed range.

主权项

1. A recording medium transport device comprising:
a transport path along which a recording medium is transported; two transport roller pairs, that are located at different positions on the transport path in a transport direction of the recording medium, and transport the recording medium; two stepping motors, that are provided for each one of the two transport roller pairs respectively, and supply a rotational drive force to the relevant transport roller pairs; a rotational speed detecting section configured to detect a rotational speed of at least one of the two transport roller pairs; a connecting member configured to connect the two transport roller pairs; a drive switching section, that is provided to one of the two transport roller pairs and is configured to switch between a state in which the rotational drive force is transmitted between the two transport roller pairs via the connecting member and a state in which the rotational drive force is not transmitted between the two transport roller pairs; and a controller configured to cause the drive switching section to switch from the state in which the rotational drive force is not transmitted between the two transport roller pairs to the state in which the rotational drive force is transmitted between the two transport roller pairs via the connecting member, when the rotational speed detected by the rotational speed detecting section falls outside a predetermined speed range.