Sheet conveying device and image forming apparatus

Abstract

To provide a sheet conveying device preventing occurrence of a printing failure caused by water droplets attached on recording material using an injection-molded conveying guide.SOLUTION: A sheet conveying device conveying recording material and provided at an image forming apparatus comprising an image forming section and a heating section is provided with: a conveying section; and a conveying guide 123 forming a conveying passage and having a curved section 123b to form a curved passage in at least a part of the conveying passage, the conveying guide 123 being formed by injection molding. A plurality of ribs 123a extending in a conveying direction of the recording material to guide the recording material is arranged on a surface of the curved section 123b. The plurality of ribs 123a includes a first rib 123a1 and a second rib 123a2 adjacent to the first rib 123a1 and the second rib 123a2 is arranged to be deviated from the first rib 123a1 in a width direction orthogonal to the conveying direction and the conveying direction so as to form a gap from the first rib 123a1.SELECTED DRAWING: Figure 5

Claims

1. 1. A sheet conveying device that is provided in an image forming apparatus having an image forming section that forms an image on a sheet-shaped recording material and a heating section that heats the recording material, the sheet conveying device conveying the recording material, a conveying section that conveys the recording material; a first transport guide formed by injection molding, the first transport guide forming a transport path above the heating section along which the recording material is transported, the first transport guide having (i) a curved portion for forming a curved path in at least a portion of the transport path, and (ii) a plurality of ribs provided on a surface of the curved portion facing the recording material, each of the plurality of ribs extending along the transport direction of the recording material, the plurality of ribs including a first rib and a second rib adjacent to the first rib; Equipped with the second rib is arranged to be shifted from the first rib in the width direction perpendicular to the conveying direction and in the conveying direction so that a gap is formed between the second rib and the first rib; A sheet conveying device characterized in that, in the conveying direction, the first rib has a first upstream end and a first downstream end, the second rib has a second upstream end and a second downstream end, the second upstream end is located between the first upstream end and the first downstream end, and the first downstream end is located between the second upstream end and the second downstream end.

2. 2 . The sheet transport device according to claim 1 , wherein the plurality of ribs are disposed discretely on the curved portion in the width direction within a paper passage area for the recording material of a maximum paper size that can be passed.

3. 3. The sheet transport device according to claim 1, wherein the plurality of ribs are discretely disposed on the curved portion in the transport direction.

4. 4. The sheet transport device according to claim 1, wherein a length of each of the plurality of ribs in the transport direction is shorter than a length of the curved portion in the transport direction.

5. The plurality of ribs include a third rib adjacent to the second rib, and the third rib is arranged in the width direction and the conveying direction so as to form a gap between the third rib and the second rib.

5. The method according to claim 1, wherein the first rib is shifted from the second rib.

2. A sheet conveying apparatus according to claim 1 .

6. The sheet conveying device of claim 5, characterized in that, in the conveying direction, the third rib has a third upstream end and a third downstream end, the third upstream end being located between the second upstream end and the second downstream end, and the second downstream end being located between the third upstream end and the third downstream end.

7. 7. The sheet conveying device according to claim 1, wherein the surface of the curved portion facing the recording material is curved in a convex shape.

8. 8. The sheet transport device according to claim 1, further comprising a plurality of rollers disposed in the transport path so as to face the first transport guide.

9. A sheet conveying device as described in claim 8, characterized in that each of the plurality of rollers has a plurality of protrusions configured to contact the recording material.

10. A sheet conveying device as described in Claim 9, characterized in that the multiple rollers are arranged with a shift in the conveying direction.

11. 11. The sheet transport device according to claim 1, further comprising a moisture absorbing member provided in the transport path so as to face the first transport guide.

12. 12. The sheet conveying apparatus according to claim 11, wherein the moisture absorbing member is a nonwoven fabric.

13. The sheet conveying device further includes a second conveying guide facing the first conveying guide, 13. The sheet transport device according to claim 1, wherein the second transport guide is provided with a plurality of first holes.

14. The sheet conveying device further includes a cover facing the second conveying guide, The cover includes a plurality of second holes; 14. The sheet transport device according to claim 13, wherein the first holes and the second holes are arranged so as to be shifted from each other when viewed from above.

15. The sheet conveying device further includes a guide member configured to guide the recording material, the guide member being disposed downstream of the heating unit and upstream of the conveying path in the conveying direction, 15. The sheet transport device according to claim 1, wherein the guide member includes: (i) a transport rib inclined with respect to the transport direction; and (ii) an air hole.

16. The transport path is a path for double-sided printing, The sheet conveying device of any one of claims 1 to 15, characterized in that the conveying section has a roller configured to rotate in a first direction and a second direction opposite to the first direction, and configured to convey the recording material that has passed through the heating section by rotating in the first direction, and to convey the recording material to the conveying path by rotating in the second direction.

17. an image forming section configured to form an image on a recording material; a heating section configured to heat the recording material; The sheet conveying device according to any one of claims 1 to 16, which conveys the recording material; An image forming apparatus comprising:

Images