A sheet conveying device includes a discharging roller pair, a discharge sheet holding portion, and a stopper member. The discharging roller pair discharges the sheet member outside from a sheet discharge port by rotating in a forward rotational direction. The discharging roller pair includes a first conveying roller, and a roller member. The discharge sheet holding portion is for holding the sheet member discharged outside by the discharging roller pair. The stopper member is swingably supported on a rotational shaft of the first conveying roller. The stopper member allows the sheet member to be discharged to the discharge sheet holding portion when the discharging roller pair rotates in the forward rotational direction, and prevents the sheet member from intruding into the nip portion from the discharge sheet holding portion when the discharging roller pair rotates in the reverse rotational direction.

A sheet conveying device includes a discharging roller pair, a discharge sheet holding portion, and a stopper member. The discharging roller pair discharges the sheet member outside from a sheet discharge port by rotating in a forward rotational direction. The discharging roller pair includes a first conveying roller, and a roller member. The discharge sheet holding portion is for holding the sheet member discharged outside by the discharging roller pair. The stopper member is swingably supported on a rotational shaft of the first conveying roller. The stopper member allows the sheet member to be discharged to the discharge sheet holding portion when the discharging roller pair rotates in the forward rotational direction, and prevents the sheet member from intruding into the nip portion from the discharge sheet holding portion when the discharging roller pair rotates in the reverse rotational direction.

In a sheet postprocessing apparatus, an accommodation paddle increases a rate of increase in transport force generated for sheets by the accommodation paddle, in conjunction with a rate of increase in transport resistance generated for the sheets by a sheet pressing member with an increase in number of the sheets stacked on a sheet stacker.

In a sheet postprocessing apparatus, an accommodation paddle increases a rate of increase in transport force generated for sheets by the accommodation paddle, in conjunction with a rate of increase in transport resistance generated for the sheets by a sheet pressing member with an increase in number of the sheets stacked on a sheet stacker.

Provided are a sheet stacking device, a counter ejector and a box making machine, wherein: a hopper unit stacks sheet-like cardboard boxes; feeding rolls feed a cardboard box to the hopper unit; and a guiding device is disposed between the feeding rolls and the hopper unit and includes a first guide part that extends in a horizontal direction and guides a lower surface of the cardboard box and a second guide part that extends in a vertical direction and guides a rear end of the cardboard box. Due to this configuration, the occurrence of damage to box making sheets in high-speed conveying of the box making sheets can be suppressed and the box making sheets can be appropriately stacked in a prescribed posture.

Provided are a sheet stacking device, a counter ejector and a box making machine, wherein: a hopper unit stacks sheet-like cardboard boxes; feeding rolls feed a cardboard box to the hopper unit; and a guiding device is disposed between the feeding rolls and the hopper unit and includes a first guide part that extends in a horizontal direction and guides a lower surface of the cardboard box and a second guide part that extends in a vertical direction and guides a rear end of the cardboard box. Due to this configuration, the occurrence of damage to box making sheets in high-speed conveying of the box making sheets can be suppressed and the box making sheets can be appropriately stacked in a prescribed posture.

The invention provides a paper path structure that is able to perform the following four functions: pass a sheet of paper through the paper path structure with is original orientation maintained; pass a sheet of paper through the paper path structure with its original orientation reversed; stack a sheet of paper in a stack repository with its original orientation maintained; and stack a sheet of paper in the stack repository with its original orientation reversed. The invention also provides a method to operate said paper path structure as well as a stacker and a printer comprising said paper path structure.

The invention provides a paper path structure that is able to perform the following four functions: pass a sheet of paper through the paper path structure with is original orientation maintained; pass a sheet of paper through the paper path structure with its original orientation reversed; stack a sheet of paper in a stack repository with its original orientation maintained; and stack a sheet of paper in the stack repository with its original orientation reversed. The invention also provides a method to operate said paper path structure as well as a stacker and a printer comprising said paper path structure.

Provided is a fin stacking apparatus, which is configured to stack a fin having a flat-plate shape and a plurality of holes formed therein. The fin stacking apparatus includes: a plurality of stacking pins to be inserted into the plurality of holes of the fin; a suction plate which is arranged above the plurality of stacking pins and is configured to suck the fin through a plurality of holes formed in the suction plate; and a roller arranged in a slide region on the suction plate where a flat surface portion of the fin moves.

The sheet post-processing device includes a discharge port, a discharge tray, a first sheet holding member, and a second sheet holding member. The discharge port has a pair of discharge rollers that discharge a sheet including a folded sheet subjected to folding processing. The first sheet holding member and the second sheet holding member are, on a downstream side of the pair of discharge rollers in the discharge direction of the folded sheet, selectively disposed at a holding position, at which the first sheet holding member and the second sheet holding member intersect a discharge route for the folded sheet and extend downward from above the pair of discharge rollers toward the discharge tray to hold the folded sheet, and a retreat position retreated to above the discharge route for the folded sheet.