Canon Finetech Nisca Inc.

Toshiyuki Katsumata

Mamoru Kubo

Masaya Takahashi

Hisashi Osada

Junya Nakajima

Takuma Kobayashi

Yusuke Mitsui

Takeshi Fukasawa

A guide portion guides a binding unit in a first direction and a second direction. The guide portion includes a pair of first wall portions, a pair of second wall portions, a pair of third wall portions, and a restricting portion. A first protrusion is engageable between the pair of first wall portions and between the pair of second wall portions. A second protrusion is disposed upstream of the first protrusion in the first direction, and is engageable with the pair of first wall portions and the pair of third wall portions. The restricting portion restricts entry of the first protrusion from between the pair of first wall portions to between the pair of third wall portions and permits entry of the second protrusion from between the pair of first wall portions to between the pair of third wall portions.

Sheet binding apparatus, sheet processing apparatus, and image forming system

In a case where a binding unit performs a binding process at the corner portion on a first end side in a width direction of the sheet in the second posture, an abutment operation of conveying the sheet and abutting the downstream end edge of the sheet in a conveyance direction against the abutment portion, and a shift operation of moving the sheet to a position where the sheet does not contact a back side surface of the binding unit when the binding unit is in the second posture, on a second end side in the width direction with respect to a position of the sheet conveyed to the placement portion are performed. Then a movable turning unit turns the binding unit from a first posture to the second posture, and the binding process is performed by the binding unit in the second posture.

Sheet processing apparatus and image forming system

A sheet processing device includes a plurality of first units and a second unit. The first units each include, as one unit, a pressing member that presses a folding loop, a frame that movably holds the pressing member in a sheet pressing direction, and an elastic member that is disposed between the frame and the pressing member to bias the pressing member in the sheet pressing direction. The second unit supports, as one unit, a plurality of rows of first units such that the first units of each row are arranged, as a pair, so as to be opposed to each other and that an interval between the pairs is reduced stepwise from a downstream side to an upstream side in a moving direction of the second unit.

Sheet processing device and image formation apparatus provided with the same

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Yamanashi-ken, Japan

Toshiyuki Katsumata