Nisca Corporation

Hiroki Imazu

Mizuho Shirakura

Shinichi Ito

Toshiaki Kagami

Takashi Saito

Koji Kanda

Mitsunori Tomono

Yuichi Kubota

Hiroyuki Yamada

Toshihiro Horii

Kenichi Sano

Yuji Hanawa

To enable a sheet to be folded in an accurate position with a simplified folding mechanism in performing folding processing on the sheet with a pair of folding rollers, a second transport path is disposed in a direction for crossing a first transport path for guiding a sheet from a carry-in portion to a carrying-out portion, and in the cross portion are disposed a folding roller pair for performing folding processing on a sheet, and a folding deflecting member for inserting a fold of the sheet in the nip portion. Then, the folding deflecting member is comprised of a driven roller that comes into press-contact with a roller periphery of the folding roller pair, and a shift member for shifting the driven roller from a waiting position to an actuation position, and by the operation of shifting the driven roller from the waiting position outside the path to the actuation position, the sheet front end portion is fed to the nip portion from an upstream-side guide path formed in the second transport path. At this point, the shift velocity of the driven roller is made higher than the velocity of the sheet sent from the first transport path.

Sheet folding apparatus

A sheet folding apparatus for forming first folding and second folding in a sheet enables the sheet to be folded in an accurate fold position in second folding, when the front end of the sheet which is first folded in a nip position of a first folding roller pair and transported strikes a stopper member, a guide member guides a fold to undergo second folding of the first-folded sheet to a nip position of a second folding roller pair, and second folding is formed.

Sheet folding apparatus and image formation system provided with the apparatus

A sheet folding apparatus for folding a sheet, includes a first transport path for guiding the sheet from a carry-in portion to a carrying-out portion without folding; a second transport path branching off from the first transport path for folding the sheet; folding rollers to fold the sheet; a driving motor; and a control device for controlling the driving motor. The folding rollers are disposed in between the carry-in roller and the carrying-out roller. The first transport path has a pinch roller and a guide cover for covering the folding. The guide cover shifts between an actuation position in which the sheet does not contact the folding rollers and a non-actuation position in which the sheet engages with the folding rollers. The control device controls the guide cover to shift to the actuation position with the pinch roller separated from a periphery of the one of the rollers.

To provide a folding mechanism for folding a sheet with a simplified structure having no fear of causing a deviation from the fold position, wrinkle and the like, provided are a transport pathfor transporting a sheet, and folding processing meansdisposed in the transport path to fold the sheet. Then, the folding processing means is comprised of folding roll pairs () coming into press-contact with one another to rotate in the opposite directions, and folding deflecting members () for guiding the fold of the sheet to the nip portions (Np, Np) of the folding roll pairs. Then, the folding deflecting members are provided with driven rollers () in contact press-contact with the roll periphery of one of the folding roll pair, and curved guides () along the roll periphery of the other one. The driven roller provides the sheet with transport force to guide to the nip portion, and the curved guide brings the sheet along the roll periphery of the other one to guide to the nip portion.

A sheet folding apparatus for performing folding processing, has a first transport path for guiding a sheet from a carry-in entrance to a carrying-out exit without performing the folding processing; a second transport path for performing the folding processing on the sheet from the carry-in entrance; and a folding processing device disposed in a folding position in the second transport path to fold the sheet from the carry-in entrance. The second transport path is disposed to cross the first transport path, and includes a path end portion for guiding the sheet to the folding position, and another path end portion for guiding the folded sheet from the folding position to a downstream side. The path end portion and the another path end portion are disposed opposite to each other relative to the first transport path.

In a sheet folding apparatus, to enable a jammed sheet to be removed with ease when a jam occurs, a casing having a carry-in entrance and a carrying-out exit is divided into an upper unit and a lower unit via a first transport path for carrying a sheet from the carry-in entrance to the carrying-out exit, a second transport path for performing folding processing on a sheet is disposed in the direction for crossing the first transport path, and in the upper unit are disposed a sheet front end switchback path for reversing and carrying the sheet toward a folding roller pair and sheet deflecting means for guiding the sheet to the folding roller pair. Then, the upper unit is coupled to the lower unit to be openable and closable by a hinge shaft rotating around one side end portion orthogonal to the sheet transport direction of the first transport path.

Sheet folding and image formation apparatus

A sheet folding apparatus for performing folding processing on a sheet from a carry-in entrance to carry out to a carrying-out exit has a sheet feeding apparatus, a first transport path, a second transport path, and a folding processing device. The sheet feeding apparatus includes a transport roller pair in press-contact with each other, a gate stopper device having a stopper member, a register area to curve and deform the sheet with the front end regulated, and a stopper driving device for shifting the gate stopper device. The stopper member is formed so that a shift trajectory of the regulation surface is to guide the front end of the sheet to the press-contact portion of the transport roller pair. The first transport path is provided with the sheet feeding apparatus for aligning a front end of the sheet fed from the carry-in entrance to feed to a predetermined processing position.

Sheet folding apparatus with skew correction mechanism and image formation system provided with the sheet folding apparatus

Sheets after having been sequentially folding-processed are stowed neatly without becoming dog-eared, wrinkled, etc. in the course of being transported to a stacker. A folding process unit folds sequentially fed copy paper or other sheets, and a sheet stacking unit loads/stows sheets from the folding unit. A conveyance device conveying one folding-processed sheet at a time is furnished between the folding unit and the sheet stacking unit. The conveyance device includes a first, upstream conveyance unit conveying sheets from the folding process unit in a direction approximately orthogonal to the sheets' crease(s), and a second, downstream conveyance unit conveying sheets in the orientation of the crease(s). The second conveyance unit is configured with a tray member where sheets are supported one at a time, and is configured so as to sequentially deliver each sheet to the sheet stacking unit along the tray member in the orientation of the crease(s).

Sheet-folding apparatus and image-forming system equipped with the same

A sheet stacking apparatus includes a sheet transport path for transporting a sheet; a discharge device disposed adjacent to the sheet transport path for sequentially transporting the sheet; a support tray disposed adjacent to the discharge device for temporarily supporting at least a part of the sheet transported by the discharge device; a stacker disposed at a downstream side of the support tray for stacking and storing the sheet transported from the support tray; a sheet pushing member disposed on the support tray for abutting against an edge of the sheet stacked on the support tray; and a drive device capable of rotating in forward and reverse directions. The drive device reciprocally moves the sheet pushing member between a retracted position at an upstream side of a stacking position where the sheet is stacked on the support tray and a transport position at a downstream side of the stacking position.

Sheet stacking apparatus and image forming apparatus equipped with the same

A staple apparatus includes a support tray for stacking sheets into a sheet bundle, a head unit arranged at a position away from the support tray and having a drive device for driving a staple into the sheet bundle, an anvil unit arranged on the support tray for bending the staple driven into the sheet bundle, and a staple operating device for pressing the head unit against the anvil unit and for separating the head unit from the anvil unit. A cover member is arranged to freely open and close a space for the stapling operation between the head unit and the anvil unit, and a control device controls the staple operating device not to operate when the cover member is not positioned at the closed position.

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Kofu, Japan

Hiroki Imazu