Image forming system

Abstract

A sheet position detecting portion which detects a position of the sheet in which the image is formed by the image forming portion, a control portion which controls a motion of the inverting portion, and a sheet post-processing apparatus which is connected to the image forming portion and receives the sheet discharged from the discharging portion so as to apply an post-processing, and the control portion can change the motion of the inverting portion based on a detected information of the sheet position detecting portion, in such a manner that an interval time of the continuous sheets becomes equal to or more than a sheet interval time which the sheet post-processing apparatus can receive the sheet.

1 . An image forming system comprising:
 an image forming portion which forms an image in a sheet;   an inverting portion which inverts the sheet in which the image is formed by the image forming portion;   a discharging portion which discharges the sheet inverted by the inverting portion;   a sheet position detecting portion which detects a position of the sheet in which the image is formed by the image forming portion;   a control portion which controls a motion of the inverting portion; and   a sheet post-processing apparatus which is connected to the image forming portion and receives the sheet discharged from the discharging portion so as to apply an post-processing,   wherein the control portion can change the motion of the inverting portion based on a detected information of the sheet position detecting portion, in such a manner that an interval time of the continuous sheets becomes equal to or more than a sheet interval time which the sheet post-processing apparatus can receive the sheet.   
     
     
         2 . The image forming system according to  claim 1 ,
 wherein the inverting portion includes a rotating body rotating and conveying the sheet in which the image is formed by the image forming portion, in one direction and thereafter rotating and conveying in an inverting direction, and   the control portion is capable of changing a rotation start timing of the roller in the other direction based on the detected information of the sheet position detecting portion, in such a manner that an interval between the continuous sheets becomes equal to or more than a sheet interval time which the sheet post-processing apparatus is capable of receiving.   
     
     
         3 . The image forming system according to  claim 2 ,
 wherein the control portion delays the rotation start timing of the roller in the other direction at a time of conveying a subsequent sheet, in the case that an interval time between continuous preceding sheet and subsequent sheet detected by the sheet position detecting portion is shorter than a predetermined time.   
     
     
         4 . The image forming system according to  claim 1 ,
 wherein the inverting portion conveys the sheet in one direction, temporarily stops the sheet and thereafter conveys the sheet in the other direction,   the inverting portion starts conveying the sheet in the other direction and thereafter conveys the sheet to the discharging portion in a state of slowing down to a predetermined speed, and   the control portion is capable of changing a timing for slowing down the conveying speed of the sheet based on the detected information of the sheet position detecting portion after the inverting portion conveys the sheet in the other direction in such a manner that an interval time of the continuous sheets becomes equal to or more than a sheet interval time which the sheet post-processing apparatus is capable of receiving.   
     
     
         5 . The image forming system according to  claim 4 ,
 wherein the control portion sets a position starting slowing down a subsequent sheet after the inverting portion conveys the subsequent sheet in the other direction to an upstream side, in the case that the interval time between the continuous preceding sheet and subsequent sheet detected by the sheet position detecting portion is shorter than a predetermined time.   
     
     
         6 . The image forming system according to  claim 1 ,
 wherein the control portion is capable of changing a conveying speed of the inverting portion based on the detected information of the sheet position detecting portion in such a manner that an interval time of the continuous sheets at a time of being discharged from the discharging portion becomes equal to or more than a sheet interval time which the sheet post-processing apparatus is capable of receiving.   
     
     
         7 . The image forming system according to  claim 1 ,
 wherein the inverting portion includes a rotating body rotating and conveying the sheet in which the image is formed by the image forming portion in one direction and thereafter rotating and conveying in an inverting direction, and   the control portion controls a rotation start timing of the roller in the other direction and a sheet conveying speed by the roller based on the detected information from the sheet position detecting portion.   
     
     
         8 . The image forming system according to  claim 1 ,
 wherein the control portion changes a motion of the inverting portion in such a manner as to achieve a paper interval time at which the sheet post-processing apparatus is capable of receiving, in the case that the interval time of the sheet detected by the sheet position detecting portion is shorter than a predetermined time.