Sheet conveying apparatus communicably connected to post-processing apparatus, image forming apparatus, image formation system, and post-processing system

An image formation system comprising:

• an image formation unit configured to perform image formation on a sheet;
• a post-processing unit configured to perform post-processing on the sheet subjected to the image formation by said image formation unit;
• an escape section configured to receives the sheet subjected to image formation by said image formation unit without conveying the sheet to said post-processing unit;
• a switching unit configured to change a conveying destination of the sheet to one of said post-processing apparatus and said escape section;
• a determination unit configured to determine whether or not it is impossible to continue a post-processing operation by said post-processing unit;
• a count unit configured to count a value corresponding to the number of sheet bundles to be formed by sheets conveyed to said post-processing unit;
• and
• a control unit configured to, in a case where it is determined by said determination unit that it is impossible to continue the post-processing operation by said post-processing unit, control said switching unit based on the value counted by said count unit.

A post-processing system comprising:

• a conveying unit configured to convey a sheet;
• a post-processing unit configured to perform post-processing on the sheet conveyed by said conveying unit;
• an escape section configured to receive the sheet conveyed by said conveying unit without conveying the sheet to said post-processing unit;
• a switching unit configured to change a conveying destination of the sheet conveyed by said conveying unit to one of the post-processing apparatus and said escape section;
• a determination unit configured to determine whether or not it is impossible to continue a post-processing operation by said post-processing apparatus;
• a count unit configured to count a value corresponding to the number of sheet bundles to be formed by sheets conveyed to the post-processing apparatus;
• and
• a control unit configured to, in a case where it is determined by said determination unit that it is impossible to continue the post-processing operation, control said switching unit based on the value counted by said count unit.

An image forming apparatus that has a post-processing apparatus that performs post-processing on a sheet bundle formed by a plurality of sheets, communicably connected thereto, comprising:

• an image formation unit configured to perform image formation on a sheet;
• a conveying unit that includes a conveying path for conveying a sheet subjected to the image formation by said image formation unit, and a receiving unit for receiving the sheet without conveying the sheet to the post-processing apparatus;
• a determination unit configured to determine whether or not it is impossible to continue a post-processing operation by the post-processing apparatus;
• a setting unit configured to manually set a threshold value for specifying an upper limit value of sheets which can be conveyed to the post-processing apparatus after it is determined by said determination unit that it is impossible to continue the post-processing operation by the post-processing apparatus;
• and
• a control unit configured to, in a case where it is determined by said determination unit that it is impossible to continue the post-processing operation by the post-processing apparatus, control said conveying unit based on the threshold value set by said setting unit.