Drum member and image forming apparatus

Patent metadata

Field	Value
Publication number	US-11768450-B2
Application number	US-202217871563-A
Country	US
Kind code	B2
Filing date	Jul 22, 2022
Priority date	Mar 5, 2020
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

A drum member includes: a substantially cylindrical drum body having a hollow part extending in an axial direction; a sheet member wound on the drum body; an adjusting mechanism configured to adjust tension in the sheet member, the adjusting mechanism including a moving member that holds an end of the sheet member in a circumferential direction and moves in a depth direction of the hollow part, and a fixing member that fixes the moving member to the drum body; and one or more positioning members that position the moving member such that the moving member does not move in the circumferential direction of the drum body when the moving member is fixed with the fixing member.

First claim

What is claimed is:

1. A drum member comprising:
a substantially cylindrical drum body having a hollow part extending in an axial direction;
a sheet member wound on the drum body;
an adjusting mechanism configured to adjust tension in the sheet member, the adjusting mechanism including a moving member that holds an end of the sheet member in a circumferential direction and moves in a depth direction of the hollow part, and a fixing member that fixes the moving member to the drum body; and
one or more positioning members that position the moving member such that the moving member does not move in the circumferential direction of the drum body when the moving member is fixed with the fixing member.

2. The drum member according to claim 1 , wherein the moving member is fixed to the drum body with the fixing member extending in the depth direction.

3. The drum member according to claim 2 , wherein
the sheet member is fastened to the moving member by a plurality of fastening members arranged along the axial direction and held by the moving member, and
the fixing member is provided between the fastening members.

4. The drum member according to claim 3 , wherein
the fastening members extend in the depth direction and overlap the fixing member as viewed in the axial direction, and
the fixing member and the fastening members are distinguishable from each other.

5. The drum member according to claim 4 , wherein the one or more positioning members are provided on outer sides of the fixing member in the axial direction.

6. The drum member according to claim 5 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

7. The drum member according to claim 6 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

8. The drum member according to claim 4 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

9. The drum member according to claim 8 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

10. The drum member according to claim 3 , wherein the one or more positioning members are provided on outer sides of the fixing member in the axial direction.

11. The drum member according to claim 10 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

12. The drum member according to claim 11 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

13. The drum member according to claim 3 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

14. The drum member according to claim 13 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

15. The drum member according to claim 2 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

16. The drum member according to claim 15 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

17. The drum member according to claim 1 , wherein
the drum body has a replaceable seating member in the hollow part, and
the moving member is fixed to the seating member with the fixing member.

18. The drum member according to claim 17 , wherein the one or more positioning members each include a guide pin that is provided on one of the moving member and the seating member and extends in the depth direction, and a guide hole that is provided in the other of the moving member and the seating member and into which the guide pin is inserted.

19. The drum member according to claim 1 , wherein
the sheet member includes an inner layer to be in contact with the drum body, and an outer layer disposed on the inner layer, and
the inner layer is a metal layer, the outer layer is a non-metal layer, and the metal layer is stretched in the circumferential direction to generate tension.

20. An image forming apparatus comprising:
the drum member according to claim 1 , the drum member transporting a recording medium; and
an intermediate transfer device that transfers a toner image to the recording medium transported by the drum member.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Kishi Kazuki
• Yuasa Koichiro
• Hagiwara Kazuyoshi
• Tanaka Kei
• Yoshioka Tomoaki
• Baba Toshiaki
• Miyamoto Yoko
• Tanaka Hirotaka

Classifications

• G03G15/1615 Primary

  relating to the driving mechanism for the intermediate support, e.g. gears, couplings, belt tensioning · CPC title

• B41F27/12

  for attaching flexible printing formes · CPC title

• G03G15/161

  with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent · CPC title

• G03G15/1685

  Structure, details of the transfer member, e.g. chemical composition · CPC title