Sheet conveyor device

Patent metadata

Field	Value
Publication number	US-8991822-B2
Application number	US-201314039861-A
Country	US
Kind code	B2
Filing date	Sep 27, 2013
Priority date	Nov 30, 2012
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

A conveyor device includes a conveyor including a conveyor roller to convey a sheet along a conveyance path, a cover movable between a closed position where the cover covers the conveyor roller and an open position where the cover is separated from the conveyor roller. The conveyor further includes a pinch roller urged toward the conveyor roller when the cover is in the closed position. When the cover is in the closed position, the conveyor roller and the pinch roller define a nip point along the conveyance path. The conveyor device includes a holder supported by the cover and to rotatably support the pinch roller and an urging member disposed between the cover and the holder to move the holder away from the cover to urge the pinch roller toward the conveyor roller when the cover is in the closed position.

First claim

What is claimed is:

1. A sheet conveyor device comprising:
a conveyor configured to convey a sheet along a conveyance path, the conveyor comprising a conveyor roller configured to be driven to rotate;
a cover configured to be movable between a closed position where the cover covers the conveyor roller and an open position where the cover is separated from the conveyor roller to expose the conveyor roller, wherein the conveyor further comprises
a pinch roller that is urged toward the conveyor roller and is configured to be rotated following the rotation of the conveyor roller when the cover is in the closed position, wherein when the cover is in the closed position, the conveyor roller and the pinch roller face each other and define a nip point therebetween along the conveyance path, and the conveyor roller and the pinch roller are configured to convey the sheet downstream of the nip point along the conveyance path;

a holder configured to be supported by the cover and to rotatably support the pinch roller, the holder comprising a first guide portion configured to guide the sheet toward the nip point from a position upstream of the nip point along the conveyance path; and
an urging member disposed between the cover and the holder and configured to move the holder away from the cover to urge the pinch roller toward the conveyor roller when the cover is in the closed position,
wherein the first guide portion extends to a location between the pinch roller and the conveyor roller.

2. The sheet conveyor device according to claim 1 , wherein the first guide portion is disposed on a surface of the holder facing the conveyor roller.

3. The sheet conveyor device according to claim 1 , wherein the conveyance path comprises an upstream portion, a curved path portion and a downstream portion, where a conveying direction of the sheet makes a U-turn when the sheet is conveyed from the upstream portion through the curved path portion to the downstream portion, and
wherein the first guide portion defines a portion of the curved path portion.

4. The sheet conveyor device according to claim 1 , wherein the cover comprises a second guide portion configured to guide the sheet downstream of the nip point along the conveyance path.

5. The sheet conveyor device according to claim 1 , wherein the location is the nip point.

6. The sheet conveyor device according to claim 1 , further comprising:
a catch-guard portion disposed between the holder and the cover,
wherein the catch-guard portion is configured to come into contact with an edge of the sheet being conveyed downstream of the nip point along the conveyance path.

7. The sheet conveyor device according to claim 1 , further comprising:
means for contacting an edge of the sheet being conveyed downstream of the nip point along the conveyance path to restrict entanglement of the edge of the sheet with the pinch roller, the contacting means disposed between the holder and the cover.

8. The sheet conveyor device according to claim 1 , further comprising:
a reading unit configured to read an image on the sheet conveyed by the conveyor.

9. The sheet conveyor device according to claim 1 , further comprising:
an output portion configured to receive the sheet conveyed by the conveyor,
wherein the conveyor roller includes an ejection roller configured to eject the sheet conveyed by the conveyor, and
wherein the pinch roller includes an ejection pinch roller, the ejection pinch roller configured to urge against the ejection roller and rotate following rotation of the ejection roller.

10. A sheet conveyor device comprising:
a conveyor configured to convey a sheet along a conveyance path, the conveyor comprising a conveyor roller configured to be driven to rotate;
a cover configured to be movable between a closed position where the cover covers the conveyor roller and an open position where the cover is separated from the conveyor roller to expose the conveyor roller, wherein the conveyor further comprises
a pinch roller that is urged toward the conveyor roller and is configured to be rotated following the rotation of the conveyor roller when the cover is in the closed position, wherein when the cover is in the closed position, the conveyor roller and the pinch roller face each other and define a nip point therebetween along the conveyance path, and the conveyor roller and the pinch roller are configured to convey the sheet downstream of the nip point along the conveyance path;

a holder configured to be supported by the cover and to rotatably support the pinch roller, the holder comprising a first guide portion configured to guide the sheet toward the nip point from a position upstream of the nip point along the conveyance path;
an urging member disposed between the cover and the holder and configured to move the holder away from the cover to urge the pinch roller toward the conveyor roller when the cover is in the closed position; and
a base configured to support the conveyor roller rotatably, wherein the base is in contact with the holder and defines a portion of the conveyance path at a position upstream of the first guide portion when the cover is in the closed position,
wherein the holder comprises:
a first position at which the holder is supported by the conveyor roller via the pinch roller at the nip point; and
a second position at which the holder is supported by the base, and

wherein the urging member is disposed between the first position and the second position.

11. A sheet conveyor device comprising:
a conveyor configured to convey a sheet along a conveyance path, the conveyor comprising a conveyor roller configured to be driven to rotate;
a cover configured to be movable between a closed position where the cover covers the conveyor roller and an open position where the cover is separated from the conveyor roller to expose the conveyor roller, wherein the conveyor further comprises
a pinch roller that is urged toward the conveyor roller and is configured to be rotated following the rotation of the conveyor roller when the cover is in the closed position, wherein when the cover is in the closed position, the conveyor roller and the pinch roller face each other and define a nip point therebetween along the conveyance path, and the conveyor roller and the pinch roller are configured to convey the sheet downstream of the nip point along the conveyance path;

a holder configured to be supported by the cover and to rotatably support the pinch roller, the holder comprising a first guide portion configured to guide the sheet toward the nip point from a position upstream of the nip point along the conveyance path; and
an urging member disposed between the cover and the holder and configured to move the holder away from the cover to urge the pinch roller toward the conveyor roller when the cover is in the closed position,
wherein the holder includes a first end portion and a second end portion, the holder extending from the first end portion to the second end portion in a width direction of the conveyance path, and
wherein the first guide portion extends between the first end portion and the second end portion.

12. The sheet conveyor device according to claim 11 , wherein the urging member comprises a first urging member disposed closer to the first end portion, and a second urging member disposed closer to the second end portion,
the sheet conveyor device further comprising:
a stiff member being disposed between the first urging member and the second urging member, and being stiffer than the holder,

wherein the stiff member is in contact with the first urging member.

13. The sheet conveyor devic

Assignees

• Kozaki Daisuke
• Ohama Takashi
• Oyamada Ai
• Morinaga Takeru
• Brother Ind Ltd

Inventors

• Kozaki Daisuke
• Ohama Takashi
• Oyamada Ai
• Morinaga Takeru

Classifications

• B65H2404/513

  with limited number of active areas · CPC title

• B65H5/062 Primary

  between rollers or balls · CPC title

• B65H2404/144

  with relative movement of the rollers to / from each other · CPC title

• B65H2404/1431

  idler roller details · CPC title

• B65H2404/1531

  the transport surface being a cylinder · CPC title