Patent ID: 9199811
Filing Date: 2015-12-01
Classification: B65H,G03G

Abstract:
1. A sheet conveying device comprising: a device main body including, inside thereof, a first conveying roller; an opening/closing member supported by a side of the device main body so as to be openable and closable with one end of the opening/closing member as a fulcrum, the opening/closing member including a second conveying roller which forms a pair of conveying rollers together with the first conveying roller while abutting the first conveying roller when the opening/closing member is at a closing position with respect to the side, the opening/closing member, at the closing position, constituting a conveying guide of a conveyance path in which a sheet member is conveyed; and a lock mechanism configured to lock the opening/closing member, at the closing position, to the device main body, the lock mechanism including: an engaged projection provided on an inner wall surface of the device main body, the inner wall surface being perpendicular to the side, the engaged projection projecting toward a facing surface of the opening/closing member that faces the inner wall surface when the opening/closing member is at the closing position; an engaging projection provided on the facing surface, the engaging projection projecting toward the inner wall surface and configured to engage with the engaged projection when the opening/closing member is at the closing position; and an elastic supporting portion configured to support either the engaged projection or the engaging projection in such a manner that the engaged projection or the engaging projection can be displaced between a projection position and a retreat position, the elastic supporting portion biasing the engaged projection or the engaging projection toward the projection position by an elastic force thereof, wherein during a closing process in which the opening/closing member is operated in a closing direction toward the closing position, the second conveying roller is in no contact with the first conveying roller until the engaging projection abuts the engaged projection to cause the engaged projection or the engaging projection to be retreated, and climbs over the engaged projection, and the second conveying roller contacts the first conveying roller at any point within a period after the engaging projection climbs over the engaged projection and before the engaging projection reaches the closing position, wherein the engaged projection includes a first apex, a first inclined surface, and a second inclined surface, the first apex projecting in a projecting direction of the engaged projection, the first inclined surface being inclined downward from the first apex in an opening direction toward an opening position at which the opening/closing member is opened with respect to the side, the second inclined surface being inclined downward from the first apex in the closing direction of the opening/closing member with respect to the side, the engaging projection includes a base end, at least one second apex, a third inclined surface, and a fourth inclined surface, the base end being provided on the facing surface, the at least one second apex projecting in a projecting direction of the engaging projection from the base end, the third inclined surface being inclined downward from the at least one second apex in the opening direction, the fourth inclined surface being inclined downward from the at least one second apex in the closing direction, and during the closing process, the at least one second apex of the engaging projection moves along the first inclined surface toward the first apex, thereby causing the engaging projection or the engaged projection to be displaced from the projection position to the retreat position, and the at least one second apex of the engaging projection climbs over the first apex and moves along the second inclined surface, thereby causing the engaging projection or the engaged projection to be displaced from the retreat position to the projection position and causing the opening/closing member to be locked at the closing position.