Patent ID: 7995962
Filing Date: 2011-08-09
Classification: B42B,B42C,B65H,G03G

Abstract:
1. A sheet post-processing apparatus comprising: a stack tray on which a plurality of sheets is stacked; a first stapler and a second stapler for stapling the stack of sheets on the stack tray; a first moving frame member on which the first stapler is mounted rotatably; a second moving frame member on which the second stapler is mounted; an interlocking mechanism for interlocking the first moving frame member and the second moving frame member to allow the first moving frame member and the second moving frame member to move linearly in opposite directions from each other; a fixed frame member for supporting the first moving frame member and the second moving frame member in such a manner that the first moving frame member and the second moving frame member can undergo the linear movement; a rotating member rotatably mounted on the first moving frame member, the rotating member so held in engagement with the first moving frame member as to move linearly the first moving frame member by rotation of the rotating member, and also rotating the first stapler by rotation of the rotating member; and a single drive source for driving the rotating member, wherein the rotating member is so configured as to be rotatable about a rotation center thereof over a first angle range and a second angle range continuing from the first angle range with respect to the rotation center; the first moving frame member is linearly moved by the rotation of the rotating member when the rotating member is rotated by the drive source over the first angle range, and the first stapler is rotated by the rotation of the rotating member when the rotating member is rotated beyond the first angle range and over the second angle range; the rotating member has an engagement groove engaging with an engagement shaft supported by the fixed frame member; and the engagement groove has a first arcuate groove extending over an angle range corresponding to the first angle range and a second arcuate groove extending over an angle range corresponding to the second angle range.