A sheet conveyance apparatus includes a body portion, an openable portion supported by the body portion and configured to be opened and closed with respect to the body portion, a first movable guide supported by the openable portion and movable to a first position at which a first conveyance path through which a sheet is conveyed is formed between the first movable guide and the openable portion and a second position at which the first path is opened, a second movable guide movably supported by the first movable guide, and an abutment portion provided in the body portion. In a state where the openable portion is closed, the second movable guide abut with the abutment portion and is held on a position to form a second conveyance path through which the sheet is conveyed.

A sheet conveyance apparatus includes a body portion, an openable portion supported by the body portion and configured to be opened and closed with respect to the body portion, a first movable guide supported by the openable portion and movable to a first position at which a first conveyance path through which a sheet is conveyed is formed between the first movable guide and the openable portion and a second position at which the first path is opened, a second movable guide movably supported by the first movable guide, and an abutment portion provided in the body portion. In a state where the openable portion is closed, the second movable guide abut with the abutment portion and is held on a position to form a second conveyance path through which the sheet is conveyed.

A sheet feed device comprises a first conveyance path and a second conveyance path which are different sheet conveyance paths, and a conveyance path merging section for merging the first conveyance path and the second conveyance path together. At least one of the first conveyance path and the second conveyance path includes an upstream side roller that feeds sheet to downstream side in a conveyance direction. The conveyance path merging section comprises a conveyance roller pair that conveys the sheet fed from the first conveyance path and the second conveyance path through a nip; a variable mechanism that makes an arrangement angle of one roller of the conveyance roller pair to the other roller thereof variable; and a transmission mechanism that transmits a driving force from the upstream side roller provided in one of the first conveyance path and the second conveyance path to the variable mechanism.

A medium feed device includes a feed roller provided to a device body and configured to feed paper, a separator roller provided at a position on the device body facing the feed roller and configured to separate the paper, and a medium support section configured to support the medium in an inclined state upstream of the feed roller. The medium support section is configured with a variable contact angle between the paper supported by the medium support section and the separator roller.

A medium feed device includes a feed roller provided to a device body and configured to feed paper, a separator roller provided at a position on the device body facing the feed roller and configured to separate the paper, and a medium support section configured to support the medium in an inclined state upstream of the feed roller. The medium support section is configured with a variable contact angle between the paper supported by the medium support section and the separator roller.

An image forming system comprises an image forming apparatus for forming an image on a sheet and a sheet processing apparatus for performing binding processing on a sheet bundle formed of a plurality of sheets having formed the image. The sheet processing apparatus performs binding processing by a stapler on the sheet bundle placed on an intermediate tray and an opening. The image forming apparatus controls image forming preparation and timing of movement of the stapler in accordance with presence/absence of the sheet bundle on the opening, position of the stapler and timing to obtain an image forming instruction including binding processing.

An image forming system comprises an image forming apparatus for forming an image on a sheet and a sheet processing apparatus for performing binding processing on a sheet bundle formed of a plurality of sheets having formed the image. The sheet processing apparatus performs binding processing by a stapler on the sheet bundle placed on an intermediate tray and an opening. The image forming apparatus controls image forming preparation and timing of movement of the stapler in accordance with presence/absence of the sheet bundle on the opening, position of the stapler and timing to obtain an image forming instruction including binding processing.

A sheet conveyance apparatus includes a body portion, and an openable unit including an openable portion supported by the body portion, a first movable guide to guide a sheet, a supporting portion to movably support the first movable guide between a first position, at which a first conveyance path through which the sheet is conveyed is formed between the first movable guide and the openable portion, and a second position, at which the first conveyance path is opened, the supporting portion being moved away from the body portion along with an opening operation of the openable portion, and a second movable guide movably supported by the first movable guide. An abutment portion abuts with the second movable guide in a state where the openable portion is closed, such that the second movable guide is held on a position to form a second conveyance path through which the sheet is conveyed.

A sheet conveyance apparatus includes a body portion, and an openable unit including an openable portion supported by the body portion, a first movable guide to guide a sheet, a supporting portion to movably support the first movable guide between a first position, at which a first conveyance path through which the sheet is conveyed is formed between the first movable guide and the openable portion, and a second position, at which the first conveyance path is opened, the supporting portion being moved away from the body portion along with an opening operation of the openable portion, and a second movable guide movably supported by the first movable guide. An abutment portion abuts with the second movable guide in a state where the openable portion is closed, such that the second movable guide is held on a position to form a second conveyance path through which the sheet is conveyed.

A sheet storage device includes a body, a tray, a rotating member, an angle sensor, and a controller. The tray is vertically repositionable relative to the body and supports a sheet placed on the tray. The rotating member rotates in conjunction with a vertical movement of the tray. The angle sensor detects a rotation angle of the rotating member. The controller is operatively coupled to the angle sensor and determines a remaining number of sheets placed on the tray based on a detection result of the angle sensor.