Sheet conveying device, image forming apparatus incorporating the sheet conveying device, sheet conveying method using the image forming apparatus incorporating the sheet conveying device, and image forming method using the image forming apparatus incorporating the sheet conveying device

Patent metadata

Field	Value
Publication number	US-11148892-B2
Application number	US-201916269915-A
Country	US
Kind code	B2
Filing date	Feb 7, 2019
Priority date	Mar 6, 2018
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A sheet conveying device includes a position detector configured to detect a position of a side end portion of a conveyance target medium, a position adjuster configured to move in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of sheet conveyance, while conveying the conveyance target medium, and adjust a position of the conveyance target medium, according to the position of the side end portion of the conveyance target medium detected by the position detector, a transfer rotary body disposed downstream from the position adjuster in a sheet conveying direction and having a receiver mounted on the rotary body to receive the conveyance target medium, and circuitry configured to change a rotation speed of the transfer rotary body according to the position of the conveyance target medium after adjusted by the position adjuster.

First claim

What is claimed is:

1. A sheet conveying device comprising:
a sensor configured to detect a position of a side end portion of a conveyance target medium;
rollers configured to move in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of sheet conveyance, while conveying the conveyance target medium, and to adjust a position of the conveyance target medium, according to the position of the side end portion of the conveyance target medium detected by the sensor;
a cylinder disposed downstream from the rollers in a sheet conveying direction and having a receiver mounted on the cylinder to receive the conveyance target medium; and
circuitry configured to change a rotation speed of the cylinder according to the position of the conveyance target medium after adjusted by the rollers.

2. The sheet conveying device according to claim 1 , further comprising:
a first rotary encoder configured to detect a drive position when the rollers move in the at least one of the width direction of the conveyance target medium and the rotation direction of the conveyance target medium within the plane of sheet conveyance,
wherein the circuitry changes the rotation speed of the cylinder based on a detection result of the first rotary encoder.

3. The sheet conveying device according to claim 1 , further comprising:
a second rotary encoder configured to detect the rotation speed of the cylinder,
wherein the circuitry changes the rotation speed of the cylinder based on an amount of positional change of the conveyance target medium and a detection result of the second rotary encoder.

4. The sheet conveying device according to claim 1 , further comprising:
a conveyance target medium speed detector configured to detect a conveying speed of the conveyance target medium,
wherein the circuitry changes the rotation speed of the cylinder based on an amount of position change of the conveyance target medium and a detection result of the conveyance target medium speed detector.

5. The sheet conveying device according to claim 1 ,
wherein the sensor detects the position of the side end portion of the conveyance target medium for multiple times,
wherein the rollers adjusts the position of the conveyance target medium for multiple times according to the position of the side end portion of the conveyance target medium detected by the sensor, and
wherein the circuitry changes the rotation speed of the cylinder for multiple times according to the position of the conveyance target medium after adjusted by the rollers.

6. The sheet conveying device according to claim 1 ,
wherein each of a number of times to change the position of the conveyance target medium by the rollers and a number of times to change the rotation speed of the cylinder by the circuitry is smaller than a number of times to detect the position of the side end portion of the conveyance target medium by the sensor.

7. An image forming apparatus comprising the sheet conveying device according to claim 1 .

8. A sheet conveying method comprising:
detecting a position of a side end portion of a conveyance target medium;
conveying the conveyance target medium according to the position of the side end portion of the conveyance target medium detected by the detecting;
moving rollers, during the conveying, in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of sheet conveyance;
adjusting a position of the conveyance target medium;
causing a cylinder to receive and convey the conveyance target medium; and
changing a rotation speed of the cylinder according to the position of the conveyance target medium after adjusted by the adjusting.

9. The method according to claim 8 , further comprising:
moving the conveyance target medium in the at least one of the width direction of the conveyance target medium and the rotation direction of the conveyance target medium within the plane of sheet conveyance of the conveyance target medium while conveying the conveyance target medium by the rollers;
changing the position of the conveyance target medium;
detecting a drive position of the rollers moved by the moving; and
changing the rotation speed of the cylinder based on the drive position of the rollers detected by the detecting the drive position.

10. The method according to claim 8 , further comprising:
changing the rotation speed of the cylinder based on an amount of change of the position of the conveyance target medium and the rotation speed of the cylinder.

11. The method according to claim 8 , further comprising:
changing the rotation speed of the cylinder based on an amount of change of the position of the conveyance target medium and a conveying speed of the conveyance target medium directly detected.

12. The method according to claim 8 , further comprising:
moving the conveyance target medium in the at least one of the width direction and the rotation direction within the plane of sheet conveyance for multiple times according to the position of the side end portion of the conveyance target medium detected;
adjusting the position of the conveyance target medium for multiple times; and
changing the rotation speed of the cylinder for multiple times according to the position of the conveyance target medium after adjusted by the adjusting.

13. The method according to claim 8 ,
wherein each of a number of times to change the position of the conveyance target medium and a number of times to change the rotation speed of the cylinder is smaller than a number of times to detect the position of the side end portion of the conveyance target medium.

14. An image forming method comprising:
conveying a conveyance target medium using the sheet conveying method according to claim 8 , and
forming an image on the conveyance target medium.

Assignees

• Egawa Tomohiro
• Maeyama Yuichiro
• Takahashi Motoharu
• Ricoh Co Ltd

Inventors

• Egawa Tomohiro
• Maeyama Yuichiro
• Takahashi Motoharu

Classifications

• B65H7/10

  responsive to incorrect side register (controlling transverse register of webs B65H23/032) · CPC title

• B41J13/32

  Means for positioning sheets in two directions under one control, e.g. for format control or orthogonal sheet positioning · CPC title

• B65H7/06

  responsive to presence of faulty articles or incorrect separation or feed (B65H7/14 takes precedence) · CPC title

• B65H9/002 Primary

  changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall · CPC title

• B65H2404/1424

  moving in parallel to their axis · CPC title