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    • 4. 发明授权
    • Sheet feeding device for reliably separating stacked sheets and image forming apparatus using same
    • 用于可靠地分离堆叠的片材的片材进给装置和使用其的成像装置
    • US06478294B2
    • 2002-11-12
    • US09826906
    • 2001-04-06
    • Kenji Hiratani
    • Kenji Hiratani
    • B65H500
    • B65H3/0661B65H1/12B65H2301/42344B65H2403/421B65H2404/5311B65H2404/5512B65H2405/111
    • A sheet feeding device includes a feeding roller that is driven to rotate, and a base plate to stack sheets thereupon. The sheet feeding device is configured to rotate around a supporting axis thereof in directions to contact and separate from the feeding roller. A base plate pressing member is configured to press the base plate toward the feeding roller, such that an uppermost sheet of the stack of sheets stacked on the base plate contacts the feeding roller in order to be fed by the feeding roller. A first friction device is arranged in a vicinity of a first part of an upper surface of the base plate so as to oppose the feeding roller. The first friction device is configured to provide a bottom sheet of the stack of sheets stacked on the base plate with a first frictional resistance greater than a predetermined value. A second friction device is arranged upstream of the first friction device in a sheet feeding direction and is configured to provide the bottom sheet of the stack of sheets stacked on the base plate with a second frictional resistance greater than the predetermined value.
    • 片材进给装置包括被驱动旋转的进给辊和用于在其上堆叠片材的基板。 送纸装置构造成围绕其支撑轴线在与进给辊接触和分离的方向上旋转。 基板按压部件被构造成将基板朝向进给辊按压,使得堆叠在基板上的堆叠的最上面的片材与进给辊接触以便被进给辊进给。 第一摩擦装置布置在基板的上表面的第一部分附近以与进给辊相对。 第一摩擦装置被配置为提供堆叠在基板上的堆叠的片材的第一摩擦阻力大于预定值的底片。 第二摩擦装置以片材进给方向布置在第一摩擦装置的上游,并且被配置为提供堆叠在基板上的堆叠的片材的底部片材,其具有大于预定值的第二摩擦阻力。