Printing device
AssigneeSeiko Epson Corporation
InventorsKazuhisa KATO, Kenichi TANIOKA
Life of this patent
Estimating the term…
Abstract
When a user performs an operation of removing a roll body RP from a medium holding unit 42 in a state in which a leading end PA of a medium is located downstream of a first roller pair 51 in a forward direction, a printing device 1 executes a first reverse conveyance operation of rotating a first driving roller 51a in a second direction such that the medium moves in a reverse direction by a first distance, executes a first forward conveyance operation of rotating the first driving roller 51a in a first direction such that a planetary gear 132 moves from a first position to a second position, and executes a second reverse conveyance operation of rotating the first driving roller 51a in the second direction such that the medium moves in the reverse direction by a second distance.
Claims5
A printing device comprising:
- a medium holding unit including a first shaft that rotatable holds a roll body obtained by winding a long medium in a roll shape;
- a conveyance path through which the medium is to be conveyed;
- a printing unit facing the conveyed medium;
- a first roller pair including a first driving roller and a first driven roller, and rotating to convey the medium in a forward direction and a reverse direction opposite to the forward direction;
- a first shaft gear provided on the first shaft and configured to rotate the first shaft;
- a first roller gear provided on a second shaft that rotatably supports the first driving roller, and configured to rotate the first driving roller;
- a drive unit configured to generate a driving force for rotating the first driving roller in a first direction and a second direction opposite to the first direction;
- a power transmission mechanism configured to transmit, when the drive unit rotates the first driving roller in the second direction, the driving force of the drive unit to the first shaft as a rotational force in a direction in which the medium is rewound to the medium holding unit side;
- and
- a control unit configured to control the drive unit, wherein
- the power transmission mechanism includes a sun gear rotated by the driving force of the drive unit and transmitting the driving force of the drive unit to the first roller gear, a planetary gear rotatable about a rotation center of the sun gear in a state in which the planetary gear meshes with the sun gear, and a pivoting member pivotable about the rotation center of the sun gear in a state in which the planetary gear is held,
- when the drive unit rotates the first driving roller in the second direction, the pivoting member pivots such that the planetary gear is located at a first position at which the driving force of the drive unit is transmitted to the first shaft gear, and when the drive unit rotates the first driving roller in the first direction, the pivoting member pivots such that the planetary gear is located at a second position at which the driving force of the drive unit is not transmitted to the first shaft gear, and
- when a user performs an operation of removing the roll body from the medium holding unit in a state in which a leading end of the medium is located downstream of the first roller pair in the forward direction, the control unit controls the drive unit to
- execute a first reverse conveyance operation of rotating the first driving roller in the second direction such that the medium moves in the reverse direction by a first distance,
- execute a first forward conveyance operation of rotating the first driving roller in the first direction such that the planetary gear moves from the first position to the second position, and
- execute a second reverse conveyance operation of rotating the first driving roller in the second direction such that the medium moves in the reverse direction by a second distance.
Dependencies are inferred from the claim text.