Waste toner container and image forming apparatus including same

• US 10,534,311 B2
• Filed: 11/08/2017
• Issued: 01/14/2020
• Est. Priority Date: 11/30/2016
• Status: Active Grant

• Current Assignee: Konica Minolta Inc.
• Original Assignee: Konica Minolta Inc.
• Inventors: Yanase, Shinji, Fujii, Satoshi
• Primary Examiner(s): Verbitsky, Victor
• Application Number:
  US15/807,329
• Publication Number:
  US 20180150020A1
• Time in Patent Office: 797 Days
• CPC Class Codes: G03G 15/0855 the concentration being measured by optical means
• CPC Class Codes: G03G 15/0862 the level being measured by optical means
• CPC Class Codes: G03G 15/105 Detection or control means for the toner concentration
• CPC Class Codes: G03G 21/105 Arrangements for conveying toner waste
• CPC Class Codes: G03G 21/12 Toner waste containers
• CPC Class Codes: G03G 21/16 Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements

Abstract

A waste toner container provided for use in an image forming apparatus includes: a body receiving, through an inlet, waste toner discharged from the image forming apparatus, and contains the waste toner; a conveyance member conveying the waste toner, which has been received through the inlet; a waste toner deposition chamber disposed downstream of the inlet in a waste toner conveyance direction such that the waste toner that has been conveyed is increasingly deposited therein, the chamber having a light-transmissive window through which amount of the deposited waste toner is optically monitorable from outside of the body; a conductive member disposed on an inner surface of the body so as to come into contact with the waste toner being conveyed; and a connection unit disposed between the conductive member and an earth member provided in the image forming apparatus to electrically connect between the conductive member and the earth member.

Claims

1. A waste toner container that is provided for use in an image forming apparatus, the waste toner container comprising:

a body that receives, through an inlet thereof, waste toner discharged from the image forming apparatus, and contains therein the waste toner;

a conveyance member that conveys the waste toner, which has been received through the inlet;

a waste toner deposition chamber that is disposed downstream of the inlet in a waste toner conveyance direction such that the waste toner that has been conveyed by the conveyance member is increasingly deposited therein, the waste toner deposition chamber having a light-transmissive window through which an amount of the deposited waste toner is optically monitorable from outside of the body;

a conductive member that is disposed on a wall of the body near the window and coming into contact with the waste toner that is being conveyed by the conveyance member, to dissipate a charge of waste toner in order to reduce adherence of the waste toner to the window; and

a connection unit that is disposed between the conductive member and an earth member that is provided in the image forming apparatus to electrically connect between the conductive member and the earth member.

2. The waste toner container of claim 1, wherein

the conductive member is disposed on a bottom portion of the wall of the body.

3. The waste toner container of claim 1, wherein

the conductive member is sheet-like.

4. The waste toner container of claim 1, wherein

the connection unit includes:

a first connection part that is electrically connected with the conductive member; and

a second connection part that is electrically connected with the earth member, and

the second connection part is elastic, and is pressed onto the earth member.

5. The waste toner container of claim 1, wherein

the conveyance member is a rotary member that rotates around a rotational axis thereof along the waste toner conveyance direction, and includes a spiral part that applies a conveyance force in a rotational axis direction thereof to the waste toner.

6. The waste toner container of claim 5, wherein

the conveyance member further includes a stirring unit that applies a force in a rotational direction thereof to the waste toner, and

the conductive member faces the stirring unit.

7. The waste toner container of claim 1, further comprising:

a partition member that partitions an internal space of the body into an upper containing space and a lower containing space; and

a communication member via which the upper containing space and the lower containing space are only partially communicated with each other, wherein

the image forming apparatus includes;

an image carrier;

a developing unit that develops an electrostatic latent image on the image carrier with a developer to obtain a toner image;

a transfer unit that transfers the toner image from the image carrier onto a recording sheet or transfers the toner image from the image carrier onto the recording sheet via an intermediate transfer member; and

a cleaner that removes, as waste toner, residual toner on the image carrier or the intermediate transfer member after the toner image has been transferred,

the developing unit employs a trickle development system according to which while a developer including toner is supplied to a housing, part of the developer that has become excessive is discharged as waste toner,

the conveyance member, the waste toner deposition chamber, and the conductive member are disposed in the lower containing space,

the waste toner discharged from the developing unit is contained in the lower containing space through the inlet, and

the waste toner removed by the cleaner is contained in the upper containing space through another inlet of the body.

8. The waste toner container of claim 7, wherein

the lower containing space has a smaller capacity than the upper containing space, and

the waste toner deposition chamber is positioned immediately below the communication member.

9. The waste toner container of claim 1, further comprising

a screw, wherein

the conductive member is disposed facing the screw.

10. The waste toner container of claim 1, wherein

the waste toner deposition chamber is disposed midstream of a route where the conveyance member conveys the waste toner.

11. The waste toner container of claim 1, further comprising:

a partition member that partitions an internal space of the body into an upper containing space and a lower containing space located directly below the upper containing space, the partition member disposed between the upper containing space and the lower containing space, there being a hole formed through the partition member; and

a communication member connected to the hole in the partition member and configured to allow waste toner in the upper containing space to enter the lower containing space,

wherein the lower containing space receives waste toner through the inlet of the body,

the upper containing space receives waste toner through another inlet of the body, and

the conveyance member, the waste toner deposition chamber, and the conductive member are disposed in the lower containing space.

12. The waste toner container of claim 11, further comprising a second conveyance member, the second conveyance member disposed in the upper containing space and configured to rotate to move waste toner received in the upper containing space toward the communication member.

13. The waste toner container of claim 1, wherein the conductive member is disposed on a side portion of the wall of the body.

14. An image forming apparatus including a waste toner container,

the waste toner container comprising:

a body that receives, through an inlet thereof, waste toner discharged from the image forming apparatus, and contains therein the waste toner;

a conveyance member that conveys the waste toner, which has been received through the inlet;

a waste toner deposition chamber that is disposed downstream of the inlet in a waste toner conveyance direction such that the waste toner that has been conveyed by the conveyance member is increasingly deposited therein, the waste toner deposition chamber having a light-transmissive window through which an amount of the deposited waste toner is optically monitorable from outside of the body;

a conductive member that is disposed on a wall of the body near the window and coming into contact with the waste toner that is being conveyed by the conveyance member, to dissipate a charge of waste toner in order to reduce adherence of the waste toner to the window; and

a connection unit that is disposed between the conductive member and an earth member that is provided in the image forming apparatus to electrically connect between the conductive member and the earth member.

15. The image forming apparatus of claim 14, wherein

the conductive member is disposed on a bottom portion of the wall of the body.

16. The image forming apparatus of claim 14, wherein

the conductive member is sheet-like.

17. The image forming apparatus of claim 14, wherein

the connection unit includes:

a first connection part that is electrically connected with the conductive member; and

a second connection part that is electrically connected with the earth member, and

the second connection part is elastic, and is pressed onto the earth member.

18. The image forming apparatus of claim 14, wherein

the conveyance member is a rotary member that rotates around a rotational axis thereof along the waste toner conveyance direction, and includes a spiral part that applies a conveyance force in a rotational axis direction thereof to the waste toner.

19. The image forming apparatus of claim 18, wherein

the conveyance member further includes a stirring unit that applies a force in a rotational direction thereof to the waste toner, and

the conductive member faces the stirring unit.

20. The image forming apparatus of claim 14, wherein

the waste toner container further comprises:

a partition member that partitions an internal space of the body into an upper containing space and a lower containing space; and

a communication member via which the upper containing space and the lower containing space are only partially communicated with each other, wherein

the image forming apparatus includes;

an image carrier;

a developing unit that develops an electrostatic latent image on the image carrier with a developer to obtain a toner image;

a transfer unit that transfers the toner image from the image carrier onto a recording sheet or transfers the toner image from the image carrier onto the recording sheet via an intermediate transfer member; and

a cleaner that removes, as waste toner, residual toner on the image carrier or the intermediate transfer member after the toner image has been transferred,

the developing unit employs a trickle development system according to which while a developer including toner is supplied to a housing, part of the developer that has become excessive is discharged as waste toner,

the conveyance member, the waste toner deposition chamber, and the conductive member are disposed in the lower containing space,

the waste toner discharged from the developing unit is contained in the lower containing space through the inlet, and

the waste toner removed by the cleaner is contained in the upper containing space through another inlet of the body.

21. The image forming apparatus of claim 20, wherein

the lower containing space has a smaller capacity than the upper containing space, and

the waste toner deposition chamber is positioned immediately below the communication member.

22. The image forming apparatus of claim 14, further comprising

a screw, wherein

the conductive member is disposed facing the screw.

23. The image forming apparatus of claim 14, wherein

the waste toner deposition chamber is disposed midstream of a route where the conveyance member conveys the waste toner.

24. The image forming apparatus of claim 14, further comprising:

an image carrier;

a developing unit that develops an electrostatic latent image on the image carrier with a developer to obtain a toner image, the developing unit discharging an excess amount of developer as waste toner;

a transfer unit that transfers the toner image from the image carrier onto a recording sheet or transfers the toner image from the image carrier onto the recording sheet via an intermediate transfer member; and

a cleaner that removes, as waste toner, residual toner on the image carrier or the intermediate transfer member after the toner image has been transferred,

wherein the waste toner container further comprises

a partition member that partitions an internal space of the body into an upper containing space and a lower containing space located directly below the upper containing space, the partition member disposed between the upper containing space and the lower containing space, there being a hole formed through the partition member, and

a communication member connected to the hole in the partition member and configured to allow waste toner in the upper containing space to enter the lower containing space,

wherein the lower containing space receives waste toner, which was discharged from the developing unit, through the inlet of the body,

the upper containing space receives waste toner, which was removed by the cleaner, through another inlet of the body, and

the conveyance member, the waste deposition chamber, and the conductive member are disposed in the lower containing space.

25. The image forming apparatus of claim 24, wherein the waste toner container further comprises a second conveyance member, the second conveyance member is disposed in the upper containing space and is configured to rotate to move waste toner received in the upper containing space toward the communication member.

26. The image forming apparatus of claim 14, wherein the conductive member is disposed on a side portion of the wall of the body.