Toner case and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2019384207-A1
Application number	US-201916437381-A
Country	US
Kind code	A1
Filing date	Jun 11, 2019
Priority date	Jun 15, 2018
Publication date	Dec 19, 2019
Grant date	—

Abstract

A toner case includes a case main body, first and second agitators, and a transmitting mechanism. The case main body is configured to store a toner. The first and second agitators are configured to rotate and to agitate the toner in the case main body. A transmitting mechanism is configured to transmit rotation to the first and second agitators. The transmitting mechanism stops transmission of the rotation to the second agitator while the transmitting mechanism continues the transmission of the rotation to the first agitator, when driving torque of the second agitator is equal to or more than a first set value.

First claim

1 . A toner case comprising:
a case main body configured to store a toner; first and second agitators configured to rotate and to agitate the toner in the case main body; and a transmitting mechanism configured to transmit rotation to the first and second agitators, wherein the transmitting mechanism stops transmission of the rotation to the second agitator while the transmitting mechanism continues the transmission of the rotation to the first agitator, when driving torque of the second agitator is equal to or more than a first set value.

2 . The toner case according to claim 1 ,
wherein the transmitting mechanism includes: a first transmitter configured to rotate integrally with the first agitator; a second transmitter configured to rotate integrally with the second agitator; and a first connector configured to connect the first transmitter with the second transmitter, and the first connector includes a first torque limiter, wherein the first torque limiter is actuated to restrict the transmission of the rotation from the first transmitter to the second transmitter, and the transmission of the rotation to the second agitator is stopped, when the driving torque of the second agitator is equal to or more than the first set value.

3 . The toner case according to claim 2 , further comprising a third agitator configured to rotate and to agitate the toner in the case main body,
wherein the transmitting mechanism further includes: a third transmitter configured to rotate integrally with the third agitator; and a second connector configured to connect the second transmitter with the third transmitter, and the second connector includes a second torque limiter, wherein the second torque limiter is actuated to restrict the transmission of the rotation from the second transmitter to the third transmitter, and the transmission of the rotation to the third agitator is stopped, when driving torque of the third agitator is equal to or more than a second set value.

4 . The toner case according to claim 3 ,
wherein the second set value at which the second torque limiter is actuated is set to be equal to or less than the first set value at which the first torque limiter is actuated.

5 . The toner case according to claim 2 ,
wherein the first connector further includes: a driving piece connected with the first transmitter; and a driven piece connected with the second transmitter, and the first torque limiter is arranged between the driving piece and the driven piece, wherein the driving piece rotates with respect to the driven piece and the transmission of the rotation from the first transmitter to the second transmitter is restricted, when the first torque limiter is actuated.

6 . The toner case according to claim 5 ,
wherein the first agitator is configured to rotate around a first rotation axis extending along one direction, and the second agitator is configured to rotate around a second rotation axis extending along the one direction, wherein a boss protrudes from one end wall in the one direction of the case main body to an outside in the one direction, and the driving piece is rotatably attached to an outer circumference of the boss.

7 . The toner case according to claim 6 ,
wherein the driven piece is arranged at an inside in the one direction of the driving piece.

8 . The toner case according to claim 5 ,
wherein a driving gear which meshes with a gear of the first transmitter is arranged on an outer circumference of the driving piece, and a driven gear which meshes with a gear of the second transmitter is arranged on an outer circumference of the driven piece.

9 . The toner case according to claim 1 ,
wherein the case main body includes: a storage space configured to store the toner; and a discharge space from which the toner is discharged, the discharge space being communicated with the storage space, and the first and second agitators are configured to agitate the toner in the storage space and to convey the toner in the storage space to the discharge space, the first agitator is arranged at a downstream side of the second agitator in a toner conveying direction from the storage space to the discharge space.

10 . The toner case according to claim 9 ,
wherein a bottom wall of the case main body includes: a first wall arranged below the first agitator, and a second wall arranged below the second agitator, and the first wall is arranged higher than the second wall.

11 . The toner case according to claim 9 ,
wherein a bottom wall of the case main body is inclined downward from a downstream side to an upstream side in the toner conveying direction.

12 . The toner case according to claim 9 ,
wherein the discharge space is arranged higher than the storage space, and the first agitator is configured to lift the toner in the storage space to the discharge space.

13 . An image forming apparatus comprising the toner case according to claim 1 .

Assignees

• Kyocera Document Solutions Inc

Inventors

• Ishii Akira
• Tomimori Koshiro

Classifications

• G03G15/0889 Primary

  for agitation or stirring · CPC title

• G03G2215/0802

  Arrangements for agitating or circulating developer material · CPC title

• G03G2221/1657

  transmitting mechanical drive power · CPC title

• G03G2215/0819

  two or more agitators · CPC title

• G03G15/0891

  for conveying or circulating developer, e.g. augers · CPC title