Sheet processing apparatus, sheet laminator, image forming apparatus, and image forming system
A sheet processing apparatus includes a sheet separator, a position detector, a position adjuster, a take-up roller, and a take-up assembly. The sheet separator separates a two-ply sheet, and inserts a sheet medium into the two-ply sheet. The position detector detects respective amounts of positional deviations of the two-ply sheet and the sheet medium. The position adjuster adjusts the positional deviation of the two-ply sheet, before a sheet separating operation, based on the amount of the positional deviation of the two-ply sheet. The take-up roller takes up the two-ply sheet subjected to the sheet separating operation. The take-up assembly moves the take-up roller in a width direction. The position adjuster causes the positional deviation of the two-ply sheet to be adjustable based on the amount of the positional deviation of the sheet medium. The take-up assembly causes the take-up roller to be movable in sync with the position adjuster.
1 . A sheet processing apparatus comprising:
a sheet separator device configured to:
separate two sheets of a two-ply sheet, in which the two sheets are overlapped and bonded together at a bonding portion, to perform a sheet separating operation; and
insert a sheet medium between the two sheets separated from each other to perform a sheet inserting operation, the sheet medium to be conveyed in a conveyance direction toward the sheet separator device;
a position detector device configured to:
detect an amount of a positional deviation of the two-ply sheet in a width direction orthogonal to the conveyance direction; and
detect an amount of a positional deviation of the sheet medium in the width direction;
a position adjuster device configured to adjust the positional deviation of the two-ply sheet in the width direction, before the sheet separating operation, based on the amount of the positional deviation of the two-ply sheet detected by the position detector device;
a take-up roller configured to take up one of the two sheets of the two-ply sheet subjected to the sheet separating operation; and
a take-up assembly mechanism configured to move the take-up roller in the width direction,
wherein the position adjuster device is further configured to cause the positional deviation of the two-ply sheet in the width direction to be adjustable based on the amount of the positional deviation of the sheet medium, and
the take-up assembly mechanism is further configured to cause the take-up roller to be movable in sync with a movement of the position adjuster device.
2 . The sheet processing apparatus according to claim 1 , wherein the position adjuster device includes:
a conveyor configured to nip the two-ply sheet and the sheet medium and convey the two-ply sheet and the sheet medium; and
a movement mechanism configured to move the conveyor in the width direction.
3 . The sheet processing apparatus according to claim 1 , wherein the take-up assembly mechanism includes:
a holder device configured to rotatably hold the take-up roller; and
a driver configured to move the holder device in the width direction.
4 . The sheet processing apparatus according to claim 1 , wherein the take-up assembly mechanism includes:
a holder device configured to rotatably hold the take-up roller; and
a spring configured to return the holder device to an original position.
5 . The sheet processing apparatus according to claim 1 , further comprising:
a conveyor configured to nip the two-ply sheet and the sheet medium and convey the two-ply sheet and the sheet medium,
wherein the take-up assembly mechanism is further configured to move the take-up roller and the conveyor, as a single unit, in the width direction.
6 . The sheet processing apparatus according to claim 1 , wherein the take-up roller includes a gripper configured to change between:
an open state in which the gripper is open to allow an insertion of an end of one of the two sheets of the two-ply sheet; and
a gripping state in which the gripper is closed to grip the end of one of the two sheets of the two-ply sheet inserted to the gripper.
7 . The sheet processing apparatus according to claim 1 , wherein the position adjuster device is further configured to adjust a center position of the sheet medium in the width direction to match a center position of the two-ply sheet in the width direction.
8 . The sheet processing apparatus according to claim 1 , wherein the position adjuster device is further configured to change an adjustment amount of a position in the width direction to a value within a range of a length of the two-ply sheet in the width direction.
9 . The sheet processing apparatus according to claim 8 , further comprising:
an operation panel configured to receive at least one user input, the at least one user input indicating a positional adjustment amount of the position adjuster device in the width direction.
10 . The sheet processing apparatus according to claim 1 , wherein the position detector device includes:
a first detector configured to detect the amount of the positional deviation in the width direction; and
a second detector configured to detect the amount of the positional deviation in the width direction.
11 . The sheet processing apparatus according to claim 10 , wherein the first detector includes an optical sensor configured to detect at least one end of the sheet medium in a main scanning direction of the sheet medium.
12 . The sheet processing apparatus according to claim 10 , wherein the first detector is configured to move along a main scanning direction of the sheet medium in order to detect opposite ends of the sheet medium.
13 . The sheet processing apparatus according to claim 10 , wherein the second detector includes an optical sensor configured to detect at least one end of the two-ply sheet in a main scanning direction of the two-ply sheet.
14 . The sheet processing apparatus according to claim 1 , wherein the position adjuster device is configured to move to meet a center position in the width direction with a center reference position of the sheet processing apparatus.
15 . The sheet processing apparatus according to claim 1 , further comprising:
a guide device configured to guide one of the two sheets, separated from each other, of the two-ply sheet to the take-up roller.
16 . The sheet processing apparatus according to claim 15 , wherein the take-up roller includes a gripper, and
the guide device is configured to move and bias the gripper to change the gripper between an open state in which the gripper is open and a gripped state in which the gripper is closed to grip the two-ply sheet.
17 . The sheet processing apparatus according to claim 16 , further comprising:
a pressure lever configured to rotate about a rotary shaft of the guide device and having one end to rotate with the guide device,
wherein the guide device includes the pressure lever, and
the pressure lever is configured to bias the gripper of the take-up roller in response to the pressure lever rotating.
18 . The sheet processing apparatus according to claim 15 , wherein the take-up roller is inside of a rotation range of the guide device.
19 . The sheet processing apparatus according to claim 1 , wherein the take-up roller includes a cut-shaped holder device configured to receive one end of the two-ply sheet.
20 . The sheet processing apparatus according to claim 1 , further comprising:
a conveyor configured to nip and convey the two-ply sheet,
wherein the take-up roller has a conveyance linear velocity equal to or greater than a conveyance linear velocity of the conveyor.
21 . The sheet processing apparatus according to claim 1 , further comprising:
a feeler mounted on a rotary shaft of the take-up roller, the feeler configured to rotate with the rotary shaft of the take-up roller;
a detector configured to detect a rotation of the feeler; and
a coupler coupling the take-up roller and a driver, the driver configured to drive the take-up roller, the take-up roller configured to prevent a transmission of a driving force equal to or greater than a given torque,
wherein the take-up roller is further configured to stop a take-up of the two-ply sheet in response to the detector detecting a stopping of rotation of the feeler, after the take-up roller has started the take-up of the two-ply sheet.
22 . A sheet laminator comprising:
the sheet processing apparatus according to claim 1 ; and
a thermal presser downstream from the sheet processing apparatus in a sheet conveyance direction, the thermal presser configured to heat and press the two-ply sheet.
23 . An image forming apparatus comprising:
an image former configured to form an image on a sheet; and
the sheet laminator according to claim 22 .
24 . An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet laminator according to claim 22 .
25 . An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet laminator according to claim 22 , detachably attached to the image forming apparatus.
26 . An image forming apparatus comprising:
an image former configured to form an image on a sheet; and
the sheet processing apparatus according to claim 1 .
27 . An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet processing apparatus according to claim 1 .
28 . An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet processing apparatus according to claim 1 , detachably attached to the image forming apparatus.