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21. 发明授权

US5169136A Automatic paper feeder employing a lost motion mechanism 失效
标题翻译：自动送纸机采用迷失机构
公开(公告)号：US5169136A
公开(公告)日：1992-12-08
申请号：US789009
申请日：1991-11-07
申请人： Masahiro Yamagata , Koichiro Kitazume
发明人： Masahiro Yamagata , Koichiro Kitazume
IPC分类号： B41J13/00 , B65H5/06
CPC分类号： B41J13/0018
摘要： An automatic paper feeder for feeding a sheet of paper from a paper supply bin to a platen of a printer, comprises: a paper feed roller by which an outermost one of the sheets of paper stacked in the paper supply bin is fed toward the platen while being separated from the rest of sheets of paper; at least one conveyance roller provided between the platen and the paper feed roller train, the conveyance roller receiving a forward turning power from a drive shaft of the printer through a drive gear train having a gear unit; and a one-way torque transmission member provided between the gear unit and a shaft of the conveyance roller nearest to the platen, for transmitting the forward turning powr from the gear unit to the conveyance roller shaft only when the drive shaft of the printer is rotated in the forward direction, wherein a lost motion member is provided to the gear unit and the one-way torque member for preventing the forward turning power of the drive shaft from transmitting to the conveyance roller shaft until the gear unit is forwardly rotated in a predetermined angle, after transmitting the forward turning power from the drive shaft to the conveyance roller shaft and then transmitting a backward turning power from the drive shaft to the gear unit so that the gear unit is backwardly rotated in the predetermined angle.
摘要翻译：一种用于将纸张从供纸盒供给到打印机的压盘的自动供纸器，包括：供纸辊，堆叠在供纸盒中的最薄纸张通过该纸张供给辊被供给到压纸辊，同时与其余的纸张分离; 至少一个传送辊，设置在所述台板和所述供纸辊系之间，所述输送辊通过具有齿轮单元的驱动齿轮系从所述打印机的驱动轴接收前转动力; 以及单向转矩传递部件，其设置在齿轮单元和最靠近压板的输送辊的轴之间，用于仅当打印机的驱动轴旋转时才将前转转矩从齿轮单元传递到输送辊轴在向前方向上，其中向齿轮单元提供空转构件，并且单向扭矩构件用于防止驱动轴的前转动力传递到传送辊轴，直到齿轮单元以预定的方式向前旋转在从驱动轴向传送辊轴传递正转动力之后，然后将来自驱动轴的后退转动力传递到齿轮单元，使得齿轮单元以预定角度向后旋转。

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