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JP-7855889-B2 - Cleaning apparatus and image forming apparatus

JP7855889B2JP 7855889 B2JP7855889 B2JP 7855889B2JP-7855889-B2

Inventors

  • 三田村 尚哉
  • 下平 彬
  • 御供 喜保

Assignees

  • 富士フイルムビジネスイノベーション株式会社

Dates

Publication Date
20260511
Application Date
20220325

Claims (8)

  1. A blade-shaped cleaning member is positioned so that its tip, made of an elastic material, is pressed against the endless belt to clean the surface of the endless belt. The cleaning member is provided with a driven roll, which is positioned opposite to the cleaning member via the endless belt and rotates in accordance with the movement of the endless belt, and whose outer surface is formed of an elastic material. Equipped with , The driven roll is, The bearing is fixed to the bracket, and the bracket is biased by a biasing means, thereby providing tension to the endless belt, thus forming a tension roll. The cleaning member is A cleaning device in which the endless belt is fixed to the bracket and its relative position to the tension roll is set such that, when the endless belt is stopped, the tip of the belt remains embedded in the outer surface of the tension roll via the endless belt .
  2. The cleaning apparatus according to claim 1 , wherein the hardness of the solid rubber, which is the elastic body of the tension roll, is 30 or more, and its thickness is less than 5.0 mm .
  3. The cleaning apparatus according to claim 1 , wherein the foamed rubber, which is the elastic body of the tension roll, has a hardness of 30 or more and a thickness of less than 5.0 mm.
  4. The cleaning device according to any one of claims 1 to 3 , wherein the endless belt is an intermediate transfer belt .
  5. The cleaning apparatus according to any one of claims 1 to 4 , wherein the tension roll is formed such that its outer diameter decreases toward one end in the axial direction .
  6. A cleaning device according to any one of claims 1 to 5 , comprising a cleaning member provided so as to contact the tension roll and for cleaning the surface of the tension roll .
  7. The cleaning device according to claim 6, wherein the cleaning member is a cleaning roll in which foam is wound in a spiral shape .
  8. A cleaning device according to any one of claims 1 to 7, The drive roll, whose outer surface is formed of an elastic material, drives the aforementioned endless belt. An image forming apparatus equipped with the following features.

Description

This invention relates to a cleaning apparatus and an image forming apparatus. Patent Document 1 discloses a cleaning device comprising: a blade-shaped cleaning member positioned so that its edge contacts the surface of an endless belt member stretched between multiple rolls; and an opposing member supporting the back side of the endless belt member with which the edge contacts the blade-shaped cleaning member. The opposing member has a relief allowance portion that allows the endless belt member to move away from the blade-shaped cleaning member when the edge of the blade-shaped cleaning member deforms in a direction that bites into the surface of the endless belt member. Japanese Patent Publication No. 2011-186311 This is a side view showing the configuration of an image forming apparatus according to the first embodiment.This is a cross-sectional view showing a cleaning apparatus according to the first embodiment.This is a cross-sectional view showing an enlarged portion of the cleaning apparatus according to the first embodiment, indicating that the intermediate transfer belt is stopped.This is a cross-sectional view showing an enlarged portion of the cleaning apparatus according to the first embodiment, illustrating the state in which the intermediate transfer belt is in operation.This is a cross-sectional view showing an enlarged portion of the cleaning apparatus related to the comparative example, indicating that the intermediate transfer belt is stopped.This is a cross-sectional view showing an enlarged portion of the cleaning device related to the comparative example, illustrating the state in which the intermediate transfer belt is in operation.This is a schematic diagram showing a cleaning apparatus according to the second embodiment.This is a schematic diagram showing a cleaning apparatus according to the third embodiment. [First Embodiment] The image forming apparatus according to the first embodiment will be described below with reference to the drawings. In the first embodiment, an example in which the image forming apparatus includes an intermediate transfer belt will be described. Arrows D shown as appropriate in each figure indicate the circumferential direction D of the intermediate transfer belt 22, and arrows W indicate the axial direction W of the driven roll. [Configuration of the image forming apparatus] As shown in Figure 1, the image forming apparatus 10 has a housing 12, and an image forming unit 14, a transfer device 16, a fixing device 18, a paper feeding device 20, and a cleaning device 60 are arranged inside the housing 12. A transport path 47 for transporting paper P, which is an example of a recording medium, is formed inside the housing 12. The image forming unit 14 employs an electrophotographic method to form an image on the paper P. The image forming unit 14 has, for example, four image forming units 24. These four image forming units 24 form toner images of different colors, such as yellow, magenta, cyan, and black. The image forming unit 24 has a photoreceptor drum 26. The photoreceptor drum 26 is an example of an image holder, and rotates while holding the toner image to be transferred to the paper P on its outer surface. The image forming unit 24 is equipped with a charging device 28 for charging the photoreceptor drum 26, an exposure device 29 for forming an electrostatic latent image, a developing device 30 for developing the charged latent image with toner, and a cleaning device 32 for cleaning the photoreceptor drum 26 after transfer. The transfer device 16 has an intermediate transfer belt 22, which is an example of an endless belt. Toner images are primarily transferred to the intermediate transfer belt 22 from the photoreceptor drum 26 by the primary transfer roll 36. The primary transferred toner images are then secondarily transferred to the paper P by the secondary transfer roll 38. The intermediate transfer belt 22 is wrapped around a drive roll 40 that rotates, a driven roll 65 that rotates in accordance with the movement of the intermediate transfer belt 22, and a primary transfer roll 36, and is configured to move in the circumferential direction D. The outer surface of the drive roll 40 is formed of solid rubber 42, which is an example of an elastic material. The outer surface of the drive roll 40 is covered with solid rubber 42. The thickness of the solid rubber 42 can be, for example, 0.5 to 2.0 mm. The fixing device 18 fixes the toner image transferred to the paper P to the paper P using, for example, heat and pressure. The paper feeder 20 includes a storage section 45 for storing stacked paper P, and a pickup roll 46 for feeding the paper P stored in the storage section 45 toward the transport path 47. The transport path 47 passes through a secondary transfer position between the secondary transfer roll 38 and the drive roll 40, and a fixing position by the fixing device 18, before being discharged to the discharge section 48 outside the housing 12