Patent ID: 7243830

Claim:
A staple-leg guide mechanism, in which a C-shaped staple supplied into a striking passage formed between a front end surface of a staple supply passage and a rear surface of a face plate arranged in front of the staple supply passage is struck out toward sheets from the striking passage by a driver plate, the guide mechanism comprising: a forming plate operated in a different phase with the driver plate; a pusher provided on a side of a front end surface of the staple supply passage and having a pushing portion, by which the C-shaped staple is pushed into the striking passage; and a guide piece formed on the pushing portion of the pusher and continuously projected toward a side of the face plate in a staple striking-out direction through an inclined surface, so as to enter between both legs of a staple in the striking passage, wherein the inclined surface is formed in a position to engage with a staple when tip ends of staple legs struck out by the driver plate touch the sheets, so that the staple legs are guided by the guide piece.