A medium placement device includes a placement unit configured to have cut single paper thereon, a cover member configured to have single paper supplied to or discharged from an opening portion thereon, and a movement unit configured to move the cover member between a first position and a second position that is lower than the first position.

An image forming apparatus includes a first conveyance unit including an image forming unit to convey a sheet on which an image is formed, and a second conveyance unit including a cover movable between a close position and an open position, the second conveyance unit being movable between a first position where the sheet can be conveyed to the sheet conveyance path and a second position separated from the first position. The first conveyance unit includes a retaining portion to retain the cover at a predetermined position, wherein the cover does not interfere with the retaining portion when the second conveyance unit is positioned at the first position, and the cover is in contact with the retaining portion and retained at the open position in a condition where the second conveyance unit is positioned at the second position and the cover is moved from the close position to the open position.

A sheet storage apparatus includes an apparatus body, a sheet storage portion attachable/detachable to/from the apparatus body, a regulating portion to regulate a position of an end portion of the sheet stored in the storage portion, a cam member slidably movable by interlocking with a movement of the regulating portion, and a slide member supported on the apparatus body and slidably movable by engaging with the cam member in a case where the storage portion is attached to the apparatus body. A sensor includes a moving portion supported on the apparatus body and movable by engaging with the slide member, and a variable resistor, supported on the apparatus body, whose resistance value varies in response to a position of the moving portion in the second direction. The sensor outputs a detection value that varies in response to the resistance value of the variable resistor.

Provided is a printing apparatus for performing printing on a sheet drawn out from a roll including: a roll holding unit configured to hold the roll; a support unit configured to rotatably support the roll holding unit; a core portion provided to the roll holding unit and configured to be inserted into a hollow portion of a core pipe of the roll from an end portion of the core pipe to extend along an axis of the core pipe; a contact member provided to the core portion and configured to be put in contact with an inner wall surrounding the hollow portion of the core pipe; and a cam member disposed inside the core portion and configured to pivot to a first position where the contact member is pressed onto the inner wall and to a second position where the contact member is retracted from the inner wall.

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 feeding device includes a medium feeding mechanism switching between a first state in which the medium is fed from the feeding tray and a second state in which the medium is not fed from the feeding tray, a feeding roller rotationally driven in a forward rotation direction, and a separation roller that is rotationally driven in the reverse rotation direction when the feeding roller is rotationally driven in the forward rotation direction, wherein when the separation roller is rotationally driven in the forward rotation direction, the feeding roller is configured to be passively rotatable with respect to the separation roller, and wherein a rotation direction of the first motor when the cam member switches the medium feeding mechanism from the first state to the second state is the same as a rotation direction of the first motor when the separation roller rotates in the forward rotation direction.

An image forming apparatus includes a main body housing, an openable/closable part, a sheet feeding tray, an image forming device, a sheet feeding roller, a first coupling, a drive gear, a second coupling, a biasing member, and a link mechanism. The first coupling is provided in the sheet feeding roller. The second coupling is provided coaxially with the drive gear, rotatable following the drive gear, slidable relative to the drive gear in an axial direction and capable of fitting to the first coupling. The biasing member biases the second coupling to the first coupling to connect the second coupling to the first coupling. The link mechanism disconnects the second coupling from the first coupling against a biasing force of the biasing member so as to block a transmission of the drive force with an opening of the openable/closable part.

A perforation device includes a shaft, a perforation motor, a first perforation unit, a second perforation unit, a first cam, a second cam, a control unit and a perforation switching mechanism. The perforation switching mechanism reciprocates the shaft in an axial direction to selectively arrange the shaft in a first position in which the first cam is opposite the first perforation unit and the second perforation unit and in a second position in which the second cam is opposite the first perforation unit. The perforation switching mechanism includes a rack gear that is attached to the shaft, a perforation switching motor and a pinion gear that is fixed to the rotating shaft of the perforation switching motor and engages with the rack gear. The control unit can selectively perform first perforation processing and second perforation processing by arranging the shaft in the first position and in the second position.

A sheet conveyance apparatus includes a cover unit having a first guide, a base unit to support the cover unit in an openable and closable manner, and having a second guide, the first guide and the second guide forming a conveyance path in a state where the cover unit is closed with respect to the base unit, and a sheet feeding unit detachable from the cover unit. In addition, a cover member is supported by the cover unit to be pivotable between a closed position and covers at least a portion of the feeding unit and an open position where the portion of the feeding unit is exposed. The cover member moves from the closed position to the open position by being pressed by the holder while the feeding unit is detached from the cover unit.

The present invention relates to Indexer table (1) for rotary and horizontal shifting of paper bunches. Said indexer table (1) having spider arms shifted in rotary manner through pinion gear and servo motor. The drive power is provided to auxiliary shaft (5) from main shaft (4) through the pulley (11) and belt (19d) configuration. The juxtaposed shafts receive the drive power from the auxiliary shaft (5) through universal joints (10). The cam (12) on each shaft rotates along with rotation of the shaft for reciprocal movement of spider arm (20). The actuator (13) actuates follower (13b) for open and close movement of bunch gripper (21). Said bunch gripper (21) grips bunch paper and then said driven shaft (14) rotates so that the spider arm (20) shifts bunch paper in rotary manner. After performing operation of bunch paper, the spider arm (20) shifts bunch paper to next platform.