Adhesive bonding sheet processing device and image forming device provided with the same

A sheet processing device for applying an adhesive onto a paper sheet and conveying an adhesive-applied paper sheet, comprising:

• a carry-in path along which the paper sheet is carried in;
• a stacker section that stores the paper sheet conveyed along the carry-in path;
• a stopper section that regulates a position of the paper sheet stored in the stacker section;
• a bonding member that is positioned at an entrance of the stacker section and applies the adhesive onto the paper sheet carried in along the carry-in path;
• a retreat path which is a conveying path that branches off from the carry-in path and allows switchback conveyance of the adhesive-applied paper sheet;
• a deflection guide that is disposed at a branching position and configured to bias the paper sheet on the conveying path toward the retreat path and prevent the adhesive-applied paper sheet to be switchback-conveyed from being carried into the carry-in path;
• and
• a protruding guide including a guide portion that protrudes into the conveying path and guides the adhesive-applied paper sheet guided by the deflection guide,
• wherein the deflection guide and protruding guide are disposed so as not to contact the adhesive-applied position of the paper sheet.

A sheet processing device comprising an adhesive application device attached as a unit to a device that stores paper sheets sequentially carried into a stacker section so as to form a paper sheet bundle,

• the adhesive application device being constituted by unitizing:
• a carry-in path along which the paper sheet is carried in;
• a bonding member that is positioned at an exit of the carry-in path and is configured to be movable between an adhesive application position at which the adhesive is applied onto the paper sheet and a separated position separated from the paper sheet so as to allow passage of the paper sheet;
• a drive member that moves the bonding member between the adhesive application position and separated position;
• a platen that is provided so as to face the bonding member and backs up, at the adhesive application position, the paper sheet to be applied with the adhesive and an adhesive-applied paper sheet;
• an exit of the carry-in path and an entrance of a retreat path which is a conveying path for switchback conveyance of the adhesive-applied paper sheet in an opposite direction to a carry-in direction;
• and
• a protruding guide including a guide portion that protrudes into the conveying path and guides the adhesive-applied paper sheet to the entrance of the retreat path,
• wherein the adhesive application device is configured to be attachable to the stacker section.