| CPC B65H 1/14 (2013.01) [B65H 1/04 (2013.01); B65H 2403/40 (2013.01); B65H 2403/722 (2013.01); B65H 2405/1117 (2013.01)] | 6 Claims |
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1. A sheet storage device comprising:
a lift plate on which a sheet is placed;
a push-up member
which is turnably supported below the lift plate,
to which power of a motor is transmitted and
which is turned in a lift-up direction to push up the lift plate;
a first gear which is rotated in one direction by the power of the motor;
a second gear which meshes with the first gear;
a transmission mechanism which includes at least a third gear that meshes with the second gear to transmit the power of the motor to the push-up member; and
a turning restriction member which restricts turning of the push-up member in a direction opposite to the lift-up direction,
wherein the first gear includes a cylindrical support portion with a center axis of the first gear being a cylindrical axis,
the turning restriction member includes
an annular portion to which the support portion is fitted and which is slidable on an outer circumferential surface of the support portion in the direction of the rotation and
a protrusion portion which protrudes outward in a radial direction from the annular portion to be able to engage with the second gear and
the protrusion portion
has a shape such that the protrusion portion cannot pass through a gap between the second gear and the annular portion in a direction orthogonal to an axial direction and
is located, relative to the gap, on a downstream side in a direction of rotation of the second gear caused by the power of the motor.
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