Medium wind-up device, printing machine, and medium wind-up method

Patent metadata

Field	Value
Publication number	US-10821744-B2
Application number	US-201916292333-A
Country	US
Kind code	B2
Filing date	Mar 5, 2019
Priority date	Mar 8, 2018
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A medium wind-up device is provided to suppress causing a wrinkle at a time of winding a medium, and also suppress a fluctuation of a winding position. The medium wind-up device includes: a tension roller that presses a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, in order to provide the medium with a tension; a reversing roller that reverses the medium pressed by the tension roller, and the reversing roller being rotatable so as to follow a move of the medium; a loading mechanism that is capable of placing a load against a rotation of the reversing roller; and a wind-up portion that winds up the medium reversed by the reversing roller.

First claim

What is claimed is:

1. A medium wind-up device, comprising:
a tension roller, configured to press a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, in order to provide the medium with a tension;
a reversing roller, configured to reverse the medium pressed by the tension roller, and the reversing roller being rotatable so as to follow a move of the medium;
a loading mechanism, configured to place a load against a rotation of the reversing roller;
a wind-up portion, configured to wind up the medium reversed by the reversing roller; and
a controller, configured to control the loading mechanism,
wherein the controller controls a load applied to the medium by the loading mechanism according to a diameter of the medium wound by the wind-up portion.

2. The medium wind-up device according to claim 1 , wherein
the loading mechanism is configured to be able to stop a rotation of the reversing roller.

3. The medium wind-up device according to claim 2 , wherein
a surface of the reversing roller for contacting the medium is made to be smooth by using a metal material.

4. The medium wind-up device according to claim 3 , further comprising:
an upstream-side reversing roller, configured to reverse the medium at an upstream side in the transfer direction in relation to the tension roller, in order to have a winding angle of the medium to be wound around the tension roller, within a predetermined angle range.

5. The medium wind-up device according to claim 2 , further comprising:
an upstream-side reversing roller, configured to reverse the medium at an upstream side in the transfer direction in relation to the tension roller, in order to have a winding angle of the medium to be wound around the tension roller, within a predetermined angle range.

6. The medium wind-up device according to claim 1 , wherein
a surface of the reversing roller for contacting the medium is made to be smooth by using a metal material.

7. The medium wind-up device according to claim 6 , further comprising:
an upstream-side reversing roller, configured to reverse the medium at an upstream side in the transfer direction in relation to the tension roller, in order to have a winding angle of the medium to be wound around the tension roller, within a predetermined angle range.

8. The medium wind-up device according to claim 1 , further comprising:
an upstream-side reversing roller, configured to reverse the medium at an upstream side in the transfer direction in relation to the tension roller, in order to have a winding angle of the medium to be wound around the tension roller, within a predetermined angle range.

9. A printing machine, comprising:
an image forming device, configured to create an image on a medium, and being belt-shaped and transferred in a transfer direction that is predetermined; and
the medium wind-up device according to claim 1 , in order to wind up the medium on which the image has been created.

10. The printing machine according to claim 9 , wherein
the image forming device is configured to make an adjustment with respect to positions for creating the images, in such a way that the images are located evenly in a width-wise direction being perpendicular to the transfer direction of the medium, in a state of having been wound up by the medium wind-up device.

11. A medium wind-up method, comprising:
pressing a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, by use of a tension roller, in order to provide the medium with a tension;
reversing the medium, which is pressed by the tension roller, by use of a reversing roller, in a state where a load is placed against a rotation of the reversing roller that is rotatable so as to follow a move of the medium;
winding up the medium reversed by the reversing roller; and
controlling a load applied to the medium by the reversing roller according to a diameter of the medium which is wound.

12. A medium wind-up device, comprising:
a tension roller, configured to press a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, in order to provide the medium with a tension;
a reversing roller, configured to reverse the medium pressed by the tension roller, and the reversing roller being rotatable so as to follow a move of the medium;
a loading mechanism, configured to place a load against a rotation of the reversing roller;
a wind-up portion, configured to wind up the medium reversed by the reversing roller; and
a controller, configured to control the loading mechanism,
wherein the controller causes the loading mechanism to stop the rotation of the reversing roller when a diameter of the medium wound by the wind-up portion becomes larger than a predetermined volume.

Assignees

• Mimaki Eng Co Ltd

Inventors

• Akuta Shunsuke
• Takano Tomohiro
• Hotta Kosaku

Classifications

• B65H23/00

  Registering, tensioning, smoothing or guiding webs (registering articles B65H9/00; in connection with splicing B65H21/00) · CPC title

• B41J2/01

  Ink jet · CPC title

• B41J15/165

  for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides · CPC title

• B65H23/26

  by transverse stationary or adjustable bars or rollers · CPC title

• B65H18/103

  Reel-to-reel type web winding and unwinding mechanisms · CPC title