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    • 6. 发明公开
    • Sheet conveyance unit
    • Blattfördereinheit
    • EP2399852A2
    • 2011-12-28
    • EP11169598.7
    • 2011-06-10
    • Ricoh Company, Ltd.
    • Karikusa, YujiShirakawa, JunjiShoji, Yutaka
    • B65H9/06B65H7/02
    • B65H9/06B65H5/062B65H7/02B65H9/006B65H2404/1424B65H2404/144B65H2511/224B65H2511/514B65H2701/1311B65H2801/06B65H2220/02B65H2220/01
    • A sheet conveyance unit (105) includes first and second conveyance rollers (151A,151B) facing each other, a first stopper (155A) provided at an axial end portion of the first conveyance roller (151A), projecting radially beyond a circumferential surface of the first conveyance roller (151A), downstream rollers (152) positioned downstream from the first and second conveyance rollers (151A,151B) in a sheet conveyance direction, a unit for engaging and disengaging to disengage the first and second conveyance rollers (151A,151B) from each other, and a controller. The first stopper (155A) rotates to a contact position projecting into the sheet conveyance path and to a non-contact position away from the sheet conveyance path as the first conveyance roller (151A) rotates. The first stopper (155A) moves to the non-contact position after stopping a sheet. The first and second conveyance rollers (151A,151B) are disengaged from each other after a leading end of the sheet reaches the downstream rollers (152), before the first stopper (155A) moves to the contact position.
    • 片材输送单元(105)包括彼此相对的第一和第二输送辊(151A,151B),设置在第一输送辊(151A)的轴向端部处的第一止动件(155A) 第一输送辊(151A),在纸张输送方向上位于第一和第二输送辊(151A,151B)下游的下游辊(152),用于接合和分离以使第一和第二输送辊(151A, 151B)和控制器。 当第一输送辊(151A)旋转时,第一止动件(155A)旋转到突出到片材输送路径中的接触位置和离开片材输送路径的非接触位置。 第一止动件(155A)在停止片材之后移动到非接触位置。 在第一止动件(155A)移动到接触位置之前,在纸张的前端到达下游辊(152)之后,第一和第二输送辊(151A,151B)彼此脱离。