Image forming apparatus with coaxially rotatable cover member and sub cover member

1. An image forming apparatus, comprising:

an apparatus main body;

a cover member that is provided rotatable in a rotation direction about a rotation axis with respect to the apparatus main body, having an opening part,

a fuser that fuses a toner image formed on each medium of media wherein the fuser is attached to the apparatus main body by being inserted through the opening part and detached from the apparatus main body by being pulled out of the opening part; and

a sub cover member that has an surface portion and is attached to the fuser, wherein

in a state in which the fuser is attached to the image forming apparatus, the surface portion of the sub cover is arranged within the opening part,

the sub cover member moves in the rotation direction in correspondence with the rotation of the cover member, wherein

the rotation axis of the cover member is arranged parallel to a width direction of the media such that the cover member rotates around the rotation axis,

the sub cover member has a center axis around which the sub cover member rotates, and

the center axis of the sub cover member is coaxial to the rotation axis of the cover member such that the sub cover member rotates together with the rotation of the cover member around the rotation axis.

2. The image forming apparatus according to claim 1 , wherein

the cover member and the sub cover member are placed on an upper surface of the apparatus main body,

each of the media on which the toner image has been fixed by the fuser comes out through the opening part, reaching the continuous surface such that the media are stacked on the continuous surface in a vertical direction.

3. The image forming apparatus according to claim 1 , wherein

the sub cover member has

a first engaging part that is provided at a position at a predetermined distance from the rotation axis and engages with the cover member, and

a second engaging part that is provided at a farther distance than the first engaging part from the rotation axis and engages with the cover member, and

the sub cover member moves in a state in which the first engaging part and the second engaging part are engaged with the cover member.

4. The image forming apparatus according to claim 3 , wherein

when the cover member opens by rotating in the rotation direction, the second engaging part is pushed up by the cover member, and thereby, the sub cover member is rotated by the cover member.

5. The image forming apparatus according to claim 1 , wherein

the sub cover member has an engaging part that engages with the fuser,

the fuser has a guide part that engages with the engaging part and guides the sub cover member to move in the rotation direction, and

the sub cover member can be moved in the rotation direction by the cover member while the engaging part is guided by the guide part provided on the fuser.

6. The image forming apparatus according to claim 5 , wherein

the guide part is a long hole formed in an arc shape, and

the engaging part is a protruding part inserted into the long hole.

7. The image forming apparatus according to claim 1 , wherein

the sub cover member has a sub cover stack surface that forms a portion of the exterior surface of the cover member and is for stacking the media.

8. The image forming apparatus according to claim 7 , wherein

the sub cover member has the sub cover stack surface on an exposed portion, which is exposed from the opening part when the fuser is attached to the apparatus main body,

the cover member has a cover stack surface for stacking the media on an outer peripheral part, and

when the fuser is attached to the apparatus main body, a stack surface on which the media are stacked is formed by connecting the sub cover stack surface and the cover stack surface.

9. The image forming apparatus according to claim 8 , wherein

the sub cover member covers a gap (Sp 1 ) provided between the sub cover stack surface and the cover stack surface.

10. The image forming apparatus according to claim 9 , wherein

the rotation axis around which the cover member and the sub cover member open or close by rotating is positioned on an opposite side with respect to the gap at the exposed portion of the sub cover member.

11. The image forming apparatus according to claim 1 , wherein

the cover member includes a shaft that forms the rotation axis of the cover member, and

the center axis of the sub cover member is an imaginary axis that coincides the rotation axis of the cover member.

12. An image forming apparatus comprising:

an apparatus main body;

a cover member that is provided rotatable in a rotation direction about a rotation axis with respect to the apparatus main body, having an opening part,

a fuser that fuses a toner image formed on each medium of media wherein the fuser is attached to the apparatus main body by being inserted through the opening part and detached from the apparatus main body by being pulled out of the opening part; and

a sub cover member that has an surface portion and is attached to the fuser, wherein

in a state in which the fuser is attached to the image forming apparatus, the surface portion of the sub cover is arranged within the opening part,

the sub cover member moves in the rotation direction in correspondence with the rotation of the cover member, wherein

the sub cover member has

a first engaging part that is provided at a position at a predetermined distance from the rotation axis and engages with the cover member, and

a second engaging part that is provided at a farther distance than the first engaging part from the rotation axis and engages with the cover member, and

the sub cover member moves in a state in which the first engaging part and the second engaging part are engaged with the cover member.

13. The image forming apparatus according to claim 12 , wherein

when the cover member opens by rotating in the rotation direction, the second engaging part is pushed up by the cover member, and thereby, the sub cover member is rotated by the cover member.

14. The image forming apparatus according to claim 12 , wherein

the sub cover member has a third engaging part that engages with the fuser,

the fuser has a guide part that engages with the third engaging part and guides the sub cover member to move in the rotation direction, and

the sub cover member can be moved in the rotation direction by the cover member while the third engaging part is guided by the guide part provided on the fuser.

15. The image forming apparatus according to claim 14 , wherein

the guide part is a long hole formed in an arc shape, and

the third engaging part is a protruding part inserted into the long hole.

16. The image forming apparatus according to claim 12 , wherein

the sub cover member has a sub cover stack surface that forms a portion of the exterior surface of the cover member and is for stacking the media.

17. An image forming apparatus comprising:

an apparatus main body;

a cover member that is provided rotatable in a rotation direction about a rotation axis with respect to the apparatus main body, having an opening part,

a fuser that fuses a toner image formed on each medium of media wherein the fuser is attached to the apparatus main body by being inserted through the opening part and detached from the apparatus main body by being pulled out of the opening part; and

a sub cover member that has an surface portion and is attached to the fuser, wherein

in a state in which the fuser is attached to the image forming apparatus, the surface portion of the sub cover is arranged within the opening part,

the sub cover member moves in the rotation direction in correspondence with the rotation of the cover member, wherein

the sub cover member has an engaging part that engages with the fuser,

the fuser has a guide part that engages with the engaging part and guides the sub cover member to move in the rotation direction, and

the sub cover member can be moved in the rotation direction by the cover member while the engaging part is guided by the guide part provided on the fuser.