A sheet processing apparatus includes a conveyance unit configured to convey a sheet in a sheet conveyance direction, a punching unit configured to punch a hole to the sheet being conveyed by the conveyance unit, a moving unit configured to move the punching unit in an intersecting direction intersecting the sheet conveyance direction, a detection unit arranged upstream of the punching unit in the sheet conveyance direction and configured to change an output value based on a position of an edge portion, in the intersecting direction, of the sheet being conveyed, a cleaning portion configured to clean the detection unit, and an interlocking portion configured to move the cleaning portion so as to clean the detection unit by interlocking with a movement of the punching unit in the intersecting direction.

A sheet processing apparatus includes a sheet conveyance portion, a punching member, a punching member moving portion, a position detection portion, and a controller. In a case of performing a punching process on a preceding sheet and a succeeding sheet successively conveyed to a predetermined position, the controller is configured to execute preliminary movement after the punching process on the preceding sheet is finished and before an end portion position of the succeeding sheet in a sheet width direction that coincides with a first punching position of the succeeding sheet in a conveyance direction reaches the position detection portion. The first punching position is a position where the punching process is first performed on the succeeding sheet.

A post-processing apparatus includes a transport path having a first path member and a second path member, a punching member disposed on the transport path to perform punching on the medium. The transport path includes a first transport path disposed downstream of the punching member in a transport direction and a second transport path continuously extending downstream of the first transport path in the transport path, the second transport path having a curved shape to hold the medium in a curved state, the first path member in the second transport path forms an outer side of the curved shape and is disposed at a position further separated from the first surface than the first path member in the first transport path, and an upstream end in the transport direction of the medium in the curved state is moved from the first transport path to the second transport path.

In case of simultaneously performing a punching process and a finishing process other than the punching process in an image forming apparatus, in order to prevent an unnecessary (ineffectual) finishing process from being performed, an information processing controller unit of a multifunction peripheral performs control of permitting to set in combination a double-punching center setting and a bookbinding setting, and of prohibiting to set in combination a punch setting, other than the double-punching center setting, and the bookbinding setting.

A sheet processing apparatus includes a puncher, a first sensor positioned upstream of the puncher in the conveyance direction, a second sensor positioned upstream of the first detection position in the conveyance direction, a drive source configured to drive the puncher, a controller configured to control the drive source. The controller executes a control mode including a first process of controlling a rotation speed of the puncher on a basis of a detection result of the second sensor and a second process of controlling the rotation speed of the puncher on a basis of a detection result of the first sensor. In the control mode, the controller does not stop rotation of the puncher in a period between the punching process on the preceding sheet and a punching process on the succeeding sheet.

A sheet processing apparatus includes a puncher, a first sensor positioned upstream of the puncher in the conveyance direction, a second sensor positioned upstream of the first detection position in the conveyance direction, a drive source configured to drive the puncher, a controller configured to control the drive source. The controller executes a control mode including a first process of controlling a rotation speed of the puncher on a basis of a detection result of the second sensor and a second process of controlling the rotation speed of the puncher on a basis of a detection result of the first sensor. In the control mode, the controller does not stop rotation of the puncher in a period between the punching process on the preceding sheet and a punching process on the succeeding sheet.

In case of simultaneously performing a punching process and a finishing process other than the punching process in an image forming apparatus, in order to prevent an unnecessary (ineffectual) finishing process from being performed, an information processing controller unit of a multifunction peripheral performs control of permitting to set in combination a double-punching center setting and a bookbinding setting, and of prohibiting to set in combination a punch setting, other than the double-punching center setting, and the bookbinding setting.

A sheet processing apparatus includes a sheet conveyance portion, a punching member, a punching member moving portion, a position detection portion, and a controller. In a case of performing a punching process on a preceding sheet and a succeeding sheet successively conveyed to a predetermined position, the controller is configured to execute preliminary movement after the punching process on the preceding sheet is finished and before an end portion position of the succeeding sheet in a sheet width direction that coincides with a first punching position of the succeeding sheet in a conveyance direction reaches the position detection portion. The first punching position is a position where the punching process is first performed on the succeeding sheet.

A sheet perforating apparatus includes a punch unit configured to punch holes in a sheet from an image processing apparatus. A dust box is below the punch unit and detachably attached to a case. A lid member is attached to the dust box and is displaceable between a closed state, in which the lid member closes an opening of the dust box, and an open state, in which the lid member does not close the opening of the dust box. When in the open state, the lid member is electrically grounded to weaken static electricity of punch chips dropped from the punch unit to the lid member and directs the punch chips towards the opening.

A cutting machine can be configured to set a cutting line with respect to a cutting material that is placed on a supporting platform, cut the cutting material along one cutting line that intersect with and changes direction at a second cutting line at a corner portion, leaving a part of the cutting material connected along a predetermined distance from a point of intersection of the corner portion, and cutting along the other cutting line so as to not leave a connected part, up to a predetermined distance from the point of intersection of the corner portion.