Developer recovering device and image forming apparatus having the same

• US 8,126,340 B2
• Filed: 09/25/2007
• Issued: 02/28/2012
• Est. Priority Date: 09/25/2006
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Bito, Takahiro, Nagahama, Hitoshi
• Primary Examiner(s): Gray, David
• Assistant Examiner(s): EVANS, GEOFFREY T
• Application Number:
  US11/902,696
• Publication Number:
  US 20080075483A1
• Time in Patent Office: 1,617 Days
• Field of Search: 399/35, 399/99, 399/120, 399359-360, 43011987-11988
• US Class Current: 399/35
• CPC Class Codes: G03G 21/105 Arrangements for conveying toner waste
• CPC Class Codes: G03G 21/12 Toner waste containers
• CPC Class Codes: G03G 2221/0026 Cleaning of foreign matter, e.g. paper powder, from imaging member

Abstract

The toner transporting section is provided with a plurality of toner discharge portions, selectively discharges a waste toner from any one of the plurality of toner discharge portions, and stores the waste toner in a waste toner container to which the waste toner discharged from the selected toner discharge portion is to be stored. Accordingly, it is possible to exchange the waste toner container corresponding to the toner discharge portion not used for discharging the waste toner. Therefore, it is possible to exchange the waste toner containers without stopping an image forming operation in an image forming apparatus provided with a cleaning device.

Claims

1. A developer recovering device for transporting to waste developer containers a waste developer which has been recovered by a cleaning device for removing a residual developer on an image bearing member after a developer image has been transferred onto a recording material, comprising:

a developer transporting section having a plurality of developer discharge portions, for transporting the waste developer from the cleaning device so as to be selectively discharged from any one of the developer discharge portions;

a developer detecting section individually corresponding to the plurality of developer discharge portions, for detecting a storing state of the waste developer in the waste developer containers to which the waste developer discharged from the developer discharge portion is to be stored; and

a control section for controlling the developer transporting section so as to discharge the waste developer from the developer discharge portion corresponding to a waste developer container of the waste developer containers, which is available for storing the waste developer, based on a detection result of the developer detecting section, wherein the developer transporting section comprises;

an agitating tank that receives waste developer from the cleaning device, wherein first and second openings are formed in the agitating tank; and

an agitating member that is rotatably mounted in the agitating tank, and that is selectively rotated in first and second rotational directions in the agitating tank, wherein when the agitating member rotates in a first rotational direction, waste developer received from the cleaning device is conveyed by the agitating member directly to the first opening, and wherein when the agitating member is rotated in the second rotational direction, waste developer received from the cleaning device is conveyed by the agitating member directly to the second opening, wherein the agitating member comprises a shaft that is rotationally mounted in the agitating tank, and only a plurality of substantially flat agitating blades that extend radially outward from the shaft and that have a planar surface that extends parallel to the shaft.

2. The developer recovering device of claim 1, wherein, when the control section determines that a first one of the waste developer containers has been filled to capacity, based on a detection result of the developer detecting section, the developer transporting section is controlled so as to discharge the waste developer from the developer discharge portion to a second one of the plurality of waste developer containers which is not yet filled to capacity.

3. The developer recovering device of claim 1, further comprising a display section, wherein the control section allows the display section to display predetermined alarm information, when it is determined that the at least one waste developer container has been filled to capacity, based on a detection result of the developer detecting section.

4. The developer recovering device of claim 1, further comprising a container detecting section for detecting presence or absence of the available waste developer container in which the waste developer discharged from the respective developer discharge portions is to be stored,

wherein the control section controls the developer transporting section so as to discharge the developer only from the developer discharge portion which is available for discharging the waste developer to the waste developer container, based on a detection result of the container detecting section.

5. An image forming apparatus comprising:

an image forming section including an image bearing member for bearing a developer image and a cleaning section for removing a residual developer on the image bearing member, for allowing the image bearing section to bear the developer image based on image information, transferring the developer image onto a recording material, and fixing the transferred developer image onto the recording material; and

the developer recovering apparatus of claim 1 for recovering the developer which has been removed by the cleaning member.

6. The image forming apparatus of claim 5, wherein when the control section determines that all of the waste developer containers which are available for having the developer transported by the developer transporting section have been filled to capacity, based on a detection result of the developer detecting section, the control section allows the image forming section to stop an image forming operation.

7. The image forming apparatus of claim 5, wherein the developer detecting section detects an amount of the developer which is stored in the waste developer containers, based on the image information.

8. The image forming apparatus of claim 7, wherein the developer detecting section calculates an amount of the developer which is stored in the waste developer containers based on input signals values for individual pixels of the image information.

9. The image forming apparatus of claim 8, wherein the amount of the developer which is stored in the waste developer containers is also calculated based on weighting coefficients for individual pixels of the image information, the weighting coefficients being based upon grayscale values for the individual pixels.

10. The image forming apparatus of claim 5, further comprising a locking section capable of individually engaging and locking the waste developer containers at a position capable of storing the waste developer discharged from the respective developer discharge portions,

wherein the locking section locks the available waste developer container to which the waste developer is to be transported by the developer transporting section during an image forming operation by the image forming section, and unlocks the lock of the waste developer container to which the waste developer is not transported.

11. The developer recovering device of claim 1, wherein each agitating blade further comprises a flexible contact member that is provided at the end of the agitating blade, the flexible contact members contacting and sliding along an inner wall of the agitating tank when the agitating member rotates within the agitating tank.

12. The developer recovering device of claim 1, wherein the agitating tank is cylindrical, wherein the first and second openings in the agitating tank are formed on a cylindrical sidewall of the agitating tank, and wherein the agitating tank further comprises first and second shutters that corresponding to the first and second openings in the agitating tank, respectively, each of the first and second shutters being selectively movable between an open position in which the shutter opens the corresponding opening in the agitating tank and a closed position in which the shutter closes the corresponding opening in the agitating tank.

13. The developer recovering device of claim 12, wherein each of the first and second shutters comprises an arcuate shaped shutter body that has a shape corresponding to the cylindrical wall of the agitating tank in which the first and second openings are formed.

14. An image forming apparatus comprising:

an image forming section that forms a developer image on an image bearing member based on image data and a cleaning section for removing a residual developer on the image bearing member;

a developer transporting section that transports waste developer from the cleaning section to selected ones of a plurality of waste developer containers, wherein the developer transporting section comprises;

an agitating tank that receives waste developer from the cleaning section, wherein first and second openings are formed in the agitating tank, and

an agitating member that is rotatably mounted in the agitating tank and that rotates to convey waste developer in the agitating tank to the first and second openings, wherein the agitating member comprises a shaft that is rotationally mounted in the agitating tank, and only a plurality of substantially flat agitating blades that extend radially outward from the shaft and that have a planar surface that extends parallel to the shaft; and

a waste developer calculating section that calculates an amount of waste developer stored in each of the waste developer containers based on input signals values for individual pixels of the image data.

15. The image forming apparatus of claim 14, wherein the waste developer calculating section also calculates the amount of waste developer in each of the waste developer containers based on weighting coefficients for individual pixels of the image data, the weighting coefficients being based upon grayscale values for the individual pixels.

16. The image forming apparatus of claim 14, wherein the agitating tank is cylindrical, wherein the first and second openings in the agitating tank are formed on a cylindrical sidewall of the agitating tank, and wherein the agitating tank further comprises first and second shutters corresponding to the first and second openings in the agitating tank, respectively, each of the first and second shutters being selectively movable between an open position in which the shutter opens the corresponding opening in the agitating tank and a closed position in which the shutter closes the corresponding opening in the agitating tank.

17. The image forming apparatus of claim 16, wherein each of the first and second shutters comprises an arcuate shaped shutter body that has a shape corresponding to the cylindrical wall of the agitating tank in which the first and second opening are formed.