| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that many sensors must be installed in order to sense accurately the skew amount of a paper sheet being transported. SOLUTION: A sheet transporting device is equipped with a transporting means to transport sheets using the center position Pc as reference, a register sensor 23 to sense passage of each sheet, and an edge sensor 24 to sense the side edge of the sheet, wherein the register sensor 23 is installed in a position perpendicularly intersecting the sheet transporting direction and between the specified position Ps where the side edge of a sheet 40 in the smallest size will pass and the center position Pc, while the edge sensor 24 is installed on the side opposite the register sensor 23, and the sensing of the side edge is executed by moving the edge sensor 24 in the direction of going apart from the edge sensor 23 after the edge sensor 24 has sensed passage of the leading edge of the sheet in the standby position set previously according to the sheet size, and also the skew amount of the sheet is sensed on the basis of the timing at which the edge sensor 24 has sensed passage of the leading edge of the sheet and the timing at which the register sensor 23 has sensed passage of the leading edge of the sheet. COPYRIGHT: (C)2006,JPO&NCIPI
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