A sheet stacking apparatus includes a tray capable of stacking plural sheets, and four wires with one end of each of them being connected to a corresponding one of portions at four corners of the tray. On the downstream side of the tray concerning a sheet feeding direction, the other end of each of two wires is connected via pulleys provided above the tray. A winding unit in the apparatus vertically moves the tray hung by the four wires by winding up or rolling down the two wires. On a side opposite to the side of the tray where the connecting portion to which one end of each of the two wires connected to the winding unit is connected, the other end of each of the remaining two wires are connected via pulleys provided above and below the tray, respectively.

A system of mitigating force in a mechanical system, the system comprising a frame member, a first rail connected to the frame member, a second rail connected to the frame member and extending along the frame member in parallel to the first rail, an assembly movably engaging the first and second rails, and a first bracket located between the first and second rails, with at least one first bracket attachment secured to the frame member, the first bracket sharing an upper edge with a lower edge of the first rail, such that a downward force applied on the first rail is distributed to the first bracket and the frame member via the at least one first bracket attachment.

A paper reversing apparatus includes a main conveyance path, a reversing path, first and second guiding plates and a hardware processor. The reversing path is disposed so as to form a predetermined angle with respect to the main conveyance path. Paper enters the reversing path from the main conveyance path and leaves the reversing path to the main conveyance path by being sent backward. When paper enters the reversing path, the processor moves the first guiding plate to a position for the paper to follow the first guiding plate and moves the second guiding plate to a position to avoid the paper. When paper leaves the reversing path, the processor moves the second guiding plate to a position for the paper to follow the second guiding plate and moves the first guiding plate to a position to avoid the paper.

A medium transporting device includes a driving roller that transports a medium and that is driven to rotate, a driven roller that nips the medium between the driving roller and the driven roller and rotates in accordance with the rotation of the driving roller, a rotary shaft of the driven roller, a first pressing member that presses the rotary shaft in a direction in which the driven roller comes into contact with the driving roller, a second pressing member that presses the rotary shaft in a direction in which the driven roller comes into contact with the driving roller, and a spacer member that is integrally provided with a first spacer interposed between the rotary shaft and the first pressing member and a second spacer interposed between the rotary shaft and the second pressing member.

An image forming apparatus includes a flag, a sensor, a loop controller, a detector, and an image controller. The flag is disposed between the first and second conveying units and moves when in contact with a recording material having a loop. A signal value output from the sensor varies per a flag position. The loop controller changes a recording material speed based on the signal value output. The detector detects the recording material or an image formed on the recording material and the image controller changes an image forming condition based on the detection. The detector includes first and second contacting members that move to nip the recording material. A position of the flag, for changing a signal value output from the sensor, is included in a range in which first and second contacting members are movable.

A spindle mechanism of a winding machine includes a spindle box provided with a mounting hole; bearings respectively arranged at both ends of the mounting hole of the spindle box to form a front bearing and a rear bearing, the bearing comprises an inner ring and an outer ring; and a spindle, the spindle is arranged to pass through the mounting hole of the spindle box and is rotatably positioned on the spindle box by means of the bearings, and the number of the front bearings is the same as the number of the rear bearings, and the outer ring of at least one of the front bearing and the rear bearing is not restricted in an axial direction so as to form a free end.

A system of mitigating force in a mechanical system, the system comprising a frame member, a first rail connected to the frame member, a second rail connected to the frame member and extending along the frame member in parallel to the first rail, an assembly movably engaging the first and second rails, and a first bracket located between the first and second rails, with at least one first bracket attachment secured to the frame member, the first bracket sharing an upper edge with a lower edge of the first rail, such that a downward force applied on the first rail is distributed to the first bracket and the frame member via the at least one first bracket attachment.

A moving-side roller reliably separates from a stationary-side roller so as to enable appropriate document transport. An image reading apparatus causes a roller support member supporting the moving-side roller to come into contact with the stationary-side roller. A contact state and a separation state can be switched. The image reading apparatus includes an external force providing portion to exert a third external force on the roller support member in a direction for restraining warping that is generated in the roller support member by a first external force that a cam exerts on the roller support member and by a second external force that an urging device exerts on the roller support member.

The detection unit includes a first contact member, which comes into contact with a first surface of a recording material and a second contact member, which comes into contact with a second surface of the recording material, the first contact member and the second contact member being disposed so as to oppose each other thus being capable of nipping the recording material, and the first contact member and the second contact member are movable in a direction in which the first contact member and the second contact member nip the recording material, and is rotatable about an axis line extending in a predetermined direction, the predetermined direction being orthogonal to the direction in which the first contact member and the second contact member are movable and being orthogonal to a conveyance direction of the recording material.

The present invention relates to a w winder (1) for winding a web roll (2) from a fibrous web such as a paper web or a web of non-woven 12 material paper (2). The winder (1) comprises two support rolls (3, 4) for supporting the web roll (2) during reeling and a core shaft (5) for winding the paper reel (2). At each longitudinal end of the core shaft (5), there is a carrier chuck (6) in which the core shaft (5) is rotatably journalled. The carrier chucks to are arranged to be movable in a frame towards or away from the support rolls (3, 4) and a rider roll (8) is arranged to be capable of acting against the web roll (2) being wound. The rider roll (8) is carried by a rider roll beam (9) and the rider roll beam (9) is arranged to be movable in the frame (7) such that the rider roll (8) can be moved towards or away from the support rolls (3, 4). There is at least one actuator (10) for moving the rider roll beam (9) towards or away from the support rolls (3, 4); and at least one load cell (12) arranged to detect the force between the rider roll (8) and the web roll (2). The winder (1) also comprises at least one actuator (11) for moving the carrier chucks (6) of the core shaft (5) independently of the rider roll beam (9) and the winder (1) comprises at least one load cell (13) arranged to detect the force with which the carrier chucks (6) act on the core shaft (5). The winder (1) also comprises a logic control system (14) connected to the load cells (12, 13) such that the logic control system (14) receives measured values for the force between the web roll (2) and the rider roll (8) and the force with which the carrier chucks (6) act on the core shaft (5). The logic control system (14) is programmed to control movement of the carrier chucks (6) and the rider roll beam (9) such that the sum of the forces detected from the load cells (12, 13) and the force resulting from a calculated weight of the web roll (2) corresponds to a set value for the force between the web roll (2) and the support rolls (3, 4). The invention also relates to a corresponding method for operating the winder.