A sheet conveying apparatus includes: a plurality of driving parts each connected to one end of corresponding one of a respective plurality of rotating shafts; a first torque adjuster connected to another end of each of the plurality of rotating shafts, the first torque adjuster applying first torque to the plurality of driving parts; a second torque adjuster that applies, to the driving parts, second torque for adjusting the first torque to be applied to the driving parts by the first torque adjuster; and a hardware processor that controls the second torque to be applied to the driving parts in the second torque adjuster in accordance with a number of revolutions of the driving part.

A sheet processing apparatus includes a conveying portion, a first stack portion on which sheets conveyed are stacked, a first regulating portion which regulates a position of a sheet bundle in a crossing direction crossing to the sheet transport direction, a second regulating portion which regulates a position of a sheet bundle in the conveying direction, a first binding portion binding a corner portion of the sheet bundle by a staple, a second binding portion which binds a corner portion of a sheet bundle without a staple, a second stack portion which stacks a sheet bundle discharged from the first stack portion, and a lifting-lowering motor which lifts and lowers the second stack portion. The lifting-lowering motor is located at a downstream, in the conveying direction, of a first binding position where the first binding portion binds a sheet bundle.

The purpose of the present invention is to provide a post-processing apparatus capable of performing conveying to and storing at a predetermined stack tray without causing sheet jamming even when a sheet having larger size than a standard size is introduced. The present invention comprises a post-processing apparatus as a processing tray on which sheets conveyed in a predetermined conveyance direction are stacked into a bundle shape, an aligning device which aligns the sheets conveyed to the processing tray, a binding device which performs a binding process on the sheets aligned by the aligning device, and a controller which controls the aligning device so that a sheet is aligned at a position being apart from the binding device by a predetermined distance when the sheet conveyed to the processing tray has a predetermined size or larger.

A paper conveying apparatus and an image forming apparatus are described which can appropriately convey a sheet when the sheet is restarted after forming a loop. The paper conveying apparatus includes a conveying roller pair in the upstream side of a loop roller pair, a stepping motor for rotationally driving the conveying roller pair, and a processor for controlling rotation of the stepping motor by controlling pulse signals and excitation current supplied to the stepping motor. This processor halts rotation of the conveying roller pair by stopping output of the pulse signals when loop formation of the sheet is completed, and switches the excitation current to a lower current value which is lower than a reference current value at which excitation is turned on.

A belt step conveyor system includes a moving belt gripper mounted on a linear movement system to convey the conveyor belt rotating about a plurality of pulleys in successive distance movements while the moving belt gripper engages the conveying belt and the moving belt gripper is moved from a home position to an end position by linear movement system. The conveyor belt is stagnant by engaging a stagnating belt gripper while the moving belt gripper moves back to its home position, else the stagnating belt gripper releases the conveyor belt.

Provided is a paper-discharge apparatus that suppresses operating sound of the paper-discharge apparatus. A contact member changes the posture of the introduction guide by coming in contact with the introduction lever and rotating the introduction lever. A control unit sets a state in which paper is introduced to the paper-discharge-conveying unit to a non-contact state of the introduction lever and contact member, and sets a state when conveyed paper is guided to another discharge destination to a contact state of the introduction lever and the contact member. The control unit rotates the motor at a first speed and moves the contact member, and brings the contact member in contact with the introduction lever after setting the rotating speed of the motor to a second speed that is slower than the first speed.

The image forming apparatus includes a plate movable up and down, a control cam that moves the plate up and down, a stepping motor that derives the control cam, a sheet feeding roller that contacts the sheet on the plate moved up by the control cam to feed the sheet held in contact with the feeding unit through rotation caused by drive from the stepping motor, and a control unit that controls the stepping motor. The control unit rotates the stepping motor at a first speed so that the control cam moves the plate up. After the sheet feeding roller is rotated, when the sheet feeding roller is stopped to stop the stepping motor, the control unit changes the rotational speed of the stepping motor from the first speed to a second speed.

The purpose of the present invention is to provide a sheet bundle conveying apparatus capable of discharging a sheet bundle from a processing tray where a binding process is performed toward the downstream side in right posture to a right position. The present invention comprises a sheet bundle conveying apparatus which conveys sheets stacked at a stack portion to a storing portion at the downstream side including a first conveying member which conveys sheets at the stack portion by a predetermined distance, a second conveying member which performs relay conveyance of the sheets conveyed by the first conveying member by the predetermined distance as being set to have a higher moving speed than that of the first conveying member, and a driving portion which drives the first conveying member and the second conveying member.

A sheet conveying device includes a conveying roller, a drive motor, a second detection portion, and a control portion. The control portion includes a first drive control portion, a rotation amount calculation portion, and a second drive control portion. When a front end of a sheet member is detected by the second detection portion, the first drive control portion sets driving of the drive motor in a stopped state before the sheet makes contact with the conveying roller. Rotation amount calculation portion performs a process of calculating a rotation amount of the conveying roller after the sheet member conveyed from upstream in the conveying direction of the sheet member makes contact with the conveying roller. Second drive control portion starts driving of the drive motor at a timing in accordance with the rotation amount of the conveying roller calculated by the rotation amount calculation portion.

An image forming apparatus includes an image forming unit to form an image on a sheet, a conveyance roller, a motor, a gear train, a detection unit to detect motor driving current, a phase determination unit to determine a motor rotor rotation phase, and a control unit having first and second control modes. The control unit rotates the rotor to rotate the conveyance roller in a predetermined direction, and rotates the conveyance roller in a direction opposite to the predetermined direction. The control unit controls the driving current in the second control mode, and then switches, in response to a value corresponding to a rotor rotation speed having reached a target speed, from the second control mode to the first control mode to control the driving current. The target speed is a speed which corresponds to a speed when the conveyance roller conveys the sheet and is a constant value.