IMAGE FORMING APPARATUS

• US 20090123181A1
• Filed: 10/20/2008
• Published: 05/14/2009
• Est. Priority Date: 11/08/2007
• 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: ITO, Tetsushi, Harada, Yoshikazu, Tomita, Norio, Kikuchi, Yoshiteru
• Granted Patent: US 8,090,296 B2
• Time in Patent Office: Days
• US Class Current: 399/167
• CPC Class Codes: G03G 21/1647 Mechanical connection means
• CPC Class Codes: G03G 2221/1657 transmitting mechanical drive power
• CPC Class Codes: G03G 2221/1687 using opening shell type machines, e.g. pivoting assemblies

Abstract

There is provided an image forming apparatus that includes couplings for photoreceptor drums, couplings for waste toner transporting screws, and couplings for developing rollers, that transmit driving force to each of a plurality of driving shafts for driving a process portion that performs image formation by an electrophotographic method, and a plurality of coupling attaching/detaching members for attaching/detaching the plurality of coupling members, so as to drive the process portion. In the image forming apparatus, the plurality of coupling attaching/detaching members are provided so as to be movable independently, and the image forming apparatus includes a coupling attaching/detaching member driving mechanism that operates the coupling attaching/detaching members in association with each other.

Claims

1. An image forming apparatus that drives a process portion for performing image formation by an electrophotographic method, comprising:

a plurality of coupling members for transmitting driving force to each of a plurality of driving shafts that drive the process portion;

a plurality of coupling attaching/detaching members for attaching/detaching the plurality of coupling members; and

a coupling attaching/detaching member driving mechanism for operating the plurality of coupling attaching/detaching members in association with each other, wherein

the coupling member is configured by a driving coupling and a driven coupling, and

the plurality of coupling attaching/detaching members are provided so as to be movable independently.

2. The image forming apparatus according to claim 1, wherein the coupling attaching/detaching member driving mechanism includes an interlocking member that operates in association with an open/close operation of a cover that covers the process portion, and the interlocking member drives the coupling attaching/detaching member in association with the open/close operation of the cover to perform an attachment/detachment operation of the coupling member.

3. The image forming apparatus according to claim 1, wherein the coupling attaching/detaching member driving mechanism includes a driving transmission member that transmits driving force, among the plurality of coupling attaching/detaching members, to a second coupling attaching/detaching member through a first coupling attaching/detaching member.

4. The image forming apparatus according to claim 3, wherein the driving transmission member is an intermediate gear that transmits driving force so that an operating direction of the first coupling attaching/detaching member is opposite to an operating direction of the second coupling attaching/detaching member.

5. The image forming apparatus according to claim 1, wherein the coupling attaching/detaching member has a function of performing attachment/detachment operations of the plurality of coupling members simultaneously.

6. The image forming apparatus according to claim 5, wherein the process portion includes a plurality of photoreceptor drums having toner images formed thereon and a plurality of developing rollers for supplying toner to the photoreceptor drums, and includes, as the driving shafts, driving shafts of the plurality of photoreceptor drums and driving shafts of the plurality of developing rollers, and among the plurality of coupling attaching/detaching members, the first coupling attaching/detaching member attaches/detaches coupling members of the driving shafts of the plurality of photoreceptor drums and the second coupling attaching/detaching member attaches/detaches coupling members of the driving shafts of the plurality of developing rollers.

7. The image forming apparatus according to claim 5, wherein the process portion includes a plurality of photoreceptor drums having toner images formed thereon and a plurality of cleaning apparatuses for removing toner remaining on the photoreceptor drums, the cleaning apparatuses include waste toner transporting screws for transporting collected waste toner, and includes, as the plurality of driving shafts, driving shafts of the plurality of the photoreceptor drums and driving shafts of the plurality of waste toner transporting screws, and among the plurality of coupling attaching/detaching members, the first coupling attaching/detaching member attaches/detaches coupling members of the driving shafts of the plurality of photoreceptor drums and coupling members of the driving shafts of the plurality of waste toner transporting screws.

8. The image forming apparatus according to claim 2, wherein the image forming apparatus includes a transfer portion for transferring the toner images formed on the photoreceptor drums through an intermediate transfer belt onto a recording medium, and the interlocking member drives the coupling attaching/detaching member in association with the open/close operation of the cover to performs the attachment/detachment operation of the coupling member for transmitting driving force to a driving shaft of the intermediate transfer belt.