Mounting structure and drive device for rotary drive unit, and image forming apparatus

Abstract

To provide an attachment structure of a rotary driving part, a driving device, and an image forming device which can restrain the rotary driving part from being attached in an inclined state.SOLUTION: An attachment structure of a rotary driving part 230 includes an attached member 210, the rotary driving part 230, and an attachment member 220. The rotary driving part 230 is attached to the attached member 210 in a state where a positioned part 231 of the rotary driving part 230 is positioned by a positioning part 211 of the attached member 210 by fixing an attachment part 221 of the attachment member 220 to an attached part 212 of the attached member 210. The attachment structure further includes a regulating part 214 which covers at least a part of the attachment member 220 side of the attached part 212 with a prescribed gap distance d1.SELECTED DRAWING: Figure 6B

Claims

1. A mounting member having a positioning portion and a mounting portion, A rotary drive unit having a positioning portion that is positioned at the positioning portion, A mounting member having a mounting portion that is attached to the mounting portion and fixed to the rotation drive portion, A mounting structure for a rotary drive unit, wherein the mounting portion of the mounting member is fixed to the mounting portion of the member to be mounted, so that the positioning portion of the rotary drive unit is positioned on the positioning portion of the member to be mounted, and the rotary drive unit is mounted to the member to be mounted, The mounting portion further comprises a restricting portion that covers at least a portion of the mounting member side of the mounting portion with a predetermined gap distance, The rotary drive unit comprises a drive gear fixed to the rotating shaft and a drive transmission gear that meshes with the drive gear, The mounting structure for a rotary drive unit is characterized in that the restricting portion is provided in the region on the rotation axis side of the rotary drive unit, among the regions on both sides of a second virtual line that is perpendicular to a first virtual line passing through the rotation axis of the rotary drive unit and the rotation axis of the drive transmission gear.

2. A mounting member having a positioning portion and a mounting portion, A rotary drive unit having a positioning portion that is positioned at the positioning portion, A mounting member having a mounting portion that is attached to the mounting portion and fixed to the rotation drive portion, A mounting structure for a rotary drive unit, wherein the mounting portion of the mounting member is fixed to the mounting portion of the member to be mounted, so that the positioning portion of the rotary drive unit is positioned on the positioning portion of the member to be mounted, and the rotary drive unit is mounted to the member to be mounted, The mounting portion further comprises a restricting portion that covers at least a portion of the mounting member side of the mounting portion with a predetermined gap distance, The regulating portion is provided at least at two locations on both sides of a virtual straight line that is perpendicular to the rotation axis of the rotary drive unit and passes through the rotation axis, with the rotation axis of the rotary drive unit in between. The mounting portion is provided with a fastening portion for fastening the mounting member to the member to be mounted by a fastening member, A mounting structure for a rotary drive unit, characterized in that one of the two restricting portions provided at the aforementioned locations covers at least a portion of the fastening portion so that it cannot be fastened with the fastening member.

3. A mounting structure for a rotary drive unit according to claim 1, The mounting structure for a rotary drive unit is characterized in that the restricting portion is formed by bending a part of the member to be mounted.

4. A mounting structure for a rotary drive unit according to claim 1, The restricting portion has an erected portion that is erected on the mounting member side from the mounting member, and an extended portion that extends from the erected portion toward the mounting member. A mounting structure for a rotary drive unit, characterized in that the extended portion covers the portion to be mounted.

5. A mounting structure for a rotary drive unit according to claim 4, The mounting structure for a rotary drive unit is characterized in that the extended portion is provided with an inclined portion on the opposite side from the upright portion, which is inclined toward the upright portion so as to reduce the gap distance.

6. A mounting structure for a rotary drive unit according to claim 4, The mounting structure for a rotary drive unit is characterized in that the upright portion is formed at a predetermined distance from the side surface of the mounting member when the rotary drive unit is attached to the mounting member.

7. A mounting structure for a rotary drive unit according to claim 1, The positioning portion is a hole provided in the member to be mounted, The positioning portion is a projection provided on the rotational drive unit and protruding from the mounting member toward the mounting member, A mounting structure for a rotary drive unit, characterized in that when the rotary drive unit is attached to the member to be mounted, the protruding portion is inserted into the hole, thereby positioning the rotary drive unit relative to the member to be mounted.

8. A mounting structure for a rotary drive unit according to claim 7, The mounting structure for a rotary drive unit is characterized in that the gap distance is less than or equal to the sum of the amount of protrusion of the protruding portion from the mounting member and the thickness of the mounting portion.

9. A mounting structure for a rotary drive unit according to claim 1, The mounting structure for a rotary drive unit is characterized in that the restricting portion is provided at least at two locations on both sides of a virtual straight line perpendicular to the rotation axis of the rotary drive unit and passing through the rotation axis, with the rotation axis of the rotary drive unit in between.

10. A mounting structure for a rotary drive unit according to claim 2, The rotary drive unit comprises a drive gear fixed to the rotating shaft and a drive transmission gear that meshes with the drive gear, The mounting structure for a rotary drive unit is characterized in that the restricting portion is provided in the region on the rotation axis side of the rotary drive unit, among the regions on both sides of a second virtual line that is perpendicular to a first virtual line passing through the rotation axis of the rotary drive unit and the rotation axis of the drive transmission gear.

11. A drive device characterized by comprising a mounting structure for a rotary drive unit as described in any one of claims 1 to 10.

12. An image forming apparatus characterized by comprising the drive device described in claim 11.

Images