Sheet transporting apparatus, and document reading apparatus and printing apparatus provided with the same

Abstract

A sheet transporting apparatus including: sheet sensors arranged in a sheet transporting path; an enclosure door; a door sensor that detects the open/close state of the enclosure door; a control unit that determines the opened state or closed state of the enclosure door on the basis of the result of the detection by the door sensor, and makes a determination whether or not a sheet stays at the respective portions of the sheet sensors and whether or not the staying sheet is removed; and a display unit that displays a portion where the sheet stays, wherein the control unit controls such that it repeatedly makes a determination regarding the stay and the removal of the sheet when the sheet stays in the sheet transporting path and the enclosure door is opened, and updates the display on the basis of the result of the determination.

1 . A sheet transporting apparatus comprising:
 sheet sensors arranged at plural portions in a sheet transporting path, through which a sheet is transported, for detecting a sheet at the respective portions;   an enclosure door that shields the sheet transporting path from the outside with the closed state thereof, and can be opened for removing a sheet when the sheet stays in the sheet transporting path;   a door sensor that detects the open/close state of the enclosure door;   a control unit that determines the opened state or closed state of the enclosure door on the basis of the result of the detection by the door sensor, and makes a determination as to whether or not a sheet stays at the respective portions and whether or not the staying sheet is removed; and   a display unit that displays a portion where the sheet stays, when it is determined that the sheet stays in the sheet transporting path, wherein   the control unit controls such that it repeatedly makes a determination regarding the stay and the removal of the sheet when the sheet stays in the sheet transporting path and the enclosure door is opened, and updates the display of the portion where the sheet stays on the basis of the result of the determination.   
   
   
       2 . The sheet transporting apparatus according to  claim 1 , further comprising an opening mechanism that can open and close a part of the sheet transporting path for removing the staying sheet, and an opening portion sheet sensor that is arranged at a openable portion where the sheet transporting path is opened by the opening mechanism, and can detect the sheet when the openable portion is closed, wherein
 the control unit controls such that it repeatedly makes a determination regarding the stay and the removal of the sheet at the openable portion on the basis of the result of the detection by the opening portion sheet sensor when the openable portion is closed, and updates the display of the portion where the sheet stays on the basis of the result of the determination, while the control unit controls such that it does not make a determination regarding the stay and the removal of the sheet and does not update the display when the openable portion is opened.   
   
   
       3 . The sheet transporting apparatus according to  claim 2 , wherein
 the opening mechanism further includes an opening mechanism sensor that detects whether the opening mechanism is in its opened state or in its closed state, wherein   the control unit determines whether it makes a determination regarding the stay and the removal of the sheet at the openable portion and whether it updates the display based on the result of the determination on the basis of the result of the detection by the opening mechanism sensor.   
   
   
       4 . The sheet transporting apparatus according to  claim 1 , further comprising an instruction section that allows a user to make an instruction, wherein
 the control unit updates the display on the display unit when the instruction is given.   
   
   
       5 . The sheet transporting apparatus according to  claim 4 , wherein the control unit accepts the instruction only when the display unit displays the portion where a sheet stays. 
   
   
       6 . The sheet transporting apparatus according to  claim 1 , wherein
 the control unit allows the display unit to display in a different manner a portion where a sheet stays and a portion where a sheet has been removed, when a sheet stays at plural portions.   
   
   
       7 . The sheet transporting apparatus according to  claim 1 , wherein the control unit makes it possible to transport a sheet at the timing when the enclosure door is closed. 
   
   
       8 . A document reading apparatus provided with the sheet transporting apparatus according to  claim 1 . 
   
   
       9 . A printing apparatus provided with the sheet transporting apparatus according to  claim 1 .