Image forming apparatus

• US 8,948,676 B2
• Filed: 10/17/2013
• Issued: 02/03/2015
• Est. Priority Date: 07/21/2010
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Fukao, Takeshi
• Primary Examiner(s): Gray, David
• Assistant Examiner(s): HARRISON, MICHAEL A
• Application Number:
  US14/056,340
• Publication Number:
  US 20140044463A1
• Time in Patent Office: 474 Days
• Field of Search: 399/121, 399/343, 399/358, 399/360
• US Class Current: 399/343
• CPC Class Codes: G03G 15/161 with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
• CPC Class Codes: G03G 21/0005 for removing solid developer or debris from the electrographic recording medium
• CPC Class Codes: G03G 21/105 Arrangements for conveying toner waste
• CPC Class Codes: G03G 21/12 Toner waste containers

Abstract

An image forming apparatus includes an image bearing member to bear a toner image, a waste toner storage mechanism to store residual toner, and an intermediate transfer unit detachable from the image forming apparatus. The intermediate transfer unit includes an intermediate transfer member onto which the toner image is transferred, a cleaning device to remove residual toner remaining on the intermediate transfer member after the toner image is transferred to a recording medium, and a connecting mechanism to connect the cleaning device and the waste toner storage mechanism. The connecting mechanism includes a movable connecting tube and a moving device to move the connecting tube between a first position at which the connecting tube engages the cleaning device and the waste toner storage mechanism, and the second position at which the connecting tube separates the cleaning device from the waste toner storage mechanism.

Claims

1. An image forming apparatus, comprising:

a toner conveyance path; and

a transfer unit detachably attachable relative to the image forming apparatus, the transfer unit including

an intermediate transfer belt configured to bear a toner image,

a cleaning device configured to remove residual toner remaining on intermediate transfer belt,

a connector configured to connect the cleaning device with the toner conveyance path, and

a moving device configured to move the connector between a first position and a second position, the connector connecting the cleaning device with the toner conveyance path at the first position, and separating the cleaning device from the toner conveyance path at the second position,

wherein the moving device includes a lever to move the connector, the lever being disposed at a front side of the transfer unit with respect to a detaching direction of the transfer unit, and

wherein the transfer unit is detachable from the image forming apparatus when the connector is at the second position.

2. The image forming apparatus according to claim 1, wherein the toner conveyance path includes an engaging portion configured to engage with the connector, and wherein the engaging portion prevents the transfer unit from moving in a detaching direction of the transfer unit when the connector is at the first position.

3. The image forming apparatus according to claim 1, wherein the lever is configured to prevent the transfer unit from moving in a detaching direction of the transfer unit.

4. The image forming apparatus according to claim 1, wherein the moving device includes a cam configured to move the connector between the first position and the second position.

5. The image forming apparatus according to claim 1, wherein a direction of movement of the connector between the first position and the second position is different from a detaching direction of the transfer unit.

6. The image forming apparatus according to claim 5, wherein the direction of movement of the connector between the first position and the second position is perpendicular to the detaching direction of the transfer unit.

7. The image forming apparatus according to claim 1, wherein the connector includes an opening and a shutter configured to cover the opening when the connector is at the second position.

8. The image forming apparatus according to claim 1, wherein residual toner remaining in the connector is discharged to toner conveyance path before detaching the transfer unit from the image forming apparatus.

9. The image forming apparatus according to claim 1, further comprising a photoconductive drum on which the toner image is formed, and the toner image is transferred to the intermediate transfer belt from the photoconductive drum.

10. The image forming apparatus according to claim 1, further comprising a spring configured to bias the connector from the first position toward the second position.

11. An image forming apparatus, comprising:

a toner conveyance path; and

a transfer unit detachably attachable to the image forming apparatus, the transfer unit including

an intermediate transfer belt configured to bear a toner image,

a cleaning device configured to remove residual toner remaining on intermediate transfer belt,

a connector configured to connect the cleaning device with the toner conveyance path, and

a moving device configured to move the connector between a first position and a second position, the connector connecting the cleaning device with the toner conveyance path at the first position, and separating the cleaning device from the toner conveyance path at the second position,

wherein the connector includes a conveyance screw configured to convey the residual toner from the cleaning device to the toner conveyance path,

rotation of the conveyance screw is prevented when the connector is at the second position,

the transfer unit includes a first gear, and the connector includes a second gear configured to engage with the first gear and to rotate the conveyance screw, and

the first gear and the second gear are separated when the connector is at the second position.

12. The image forming apparatus according to claim 11, wherein the first gear is a bevel gear.

13. The image forming apparatus according to claim 11, wherein the second gear is a bevel gear.

14. The image forming apparatus according to claim 11, further comprising a photoconductive drum on which the toner image is formed, and wherein the toner image is transferred to the intermediate transfer belt from the photoconductive drum.

15. An image forming apparatus, comprising:

a toner conveyance path;

an intermediate transfer belt configured to bear a toner image;

a cleaning device configured to clean the intermediate transfer belt;

a connector configured to connect the cleaning device with the toner conveyance path; and

a moving device configured to move the connector linearly between a first position and a second position in a first direction,

wherein the intermediate transfer belt and the connector are detachable from an opening of the image forming apparatus in a second direction different from the first direction when the connector is at the second position, and

the connector is disposed at the opening.

16. The image forming apparatus according to claim 15, wherein the toner conveyance path includes an engaging portion configured to engage with the connector when the connector is at the first position.

17. The image forming apparatus according to claim 16, wherein the engaging portion prevents the intermediate transfer belt from detaching from the image forming apparatus when the connector is at the first position.

18. The image forming apparatus according to claim 15, wherein the connector projects outward from the intermediate transfer belt in the first direction when the connector is at the first position.

19. The image forming apparatus according to claim 15, wherein the second direction is perpendicular to the first direction.