Stapling device of paper finishing device

A stapling device of a paper finishing device, which is installed to staple a paper bundle ejected from an image forming device, the stapling device comprising:

• a stapler including an entrance into which one side of paper is inserted;
• a moving part including a stapler moving bracket on which the stapler is seated, and a moving roller installed on the stapler moving bracket;
• a driving part which moves the stapler moving bracket;
• a base frame on which the stapler moving bracket and the driving part are installed and which includes a horizontal guide surface extending along the one side of the paper, a first corner stapling guide surface spaced apart from the horizontal guide surface, and a first inclined guide surface which diagonally connects the horizontal guide surface and the first corner stapling guide surface;
• and
• a position guide part which is installed on the base frame and includes a second corner stapling guide surface and a second inclined guide surface which diagonally connects the horizontal guide surface and the second corner stapling guide surface and is inclined to be opposite to the first inclined guide surface,
• wherein, when the moving roller is positioned on the horizontal guide surface, the stapling device is in a horizontal stapling mode, when the moving roller is moved along the first inclined guide surface and positioned on the first corner stapling guide surface, the stapling device is in a first corner stapling mode in which the stapler moving bracket is positioned to be inclined in a counterclockwise direction, and when the moving roller is moved along the second inclined guide surface and positioned on the second corner stapling guide surface, the stapling device is in a second corner stapling mode in which the stapler moving bracket is positioned to be inclined in a clockwise direction.