JP2006256796A5 - - Google Patents
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- JP2006256796A5 JP2006256796A5 JP2005077116A JP2005077116A JP2006256796A5 JP 2006256796 A5 JP2006256796 A5 JP 2006256796A5 JP 2005077116 A JP2005077116 A JP 2005077116A JP 2005077116 A JP2005077116 A JP 2005077116A JP 2006256796 A5 JP2006256796 A5 JP 2006256796A5
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- time
- pair
- rolls
- image forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Claims (2)
前記画像形成部側に設けられた、周面が互いに接触した一対のロールからなり、該一対のロールの間に形成された第1ニップ領域にシートを挟み込んで該画像形成部にシートを送り込むタイミングを調整しながら該一対のロールが回転することで、該シートを該画像形成部に送り込むレジロールと、
前記シート収容手段側に設けられた、周面が互いに接触した回転速度の変更が自在の一対のロールからなり、該一対のロールの間に形成された第2ニップ領域にシートを挟み込んで該一対のロールが回転することで該シートに、前記レジロールへ向けての搬送力を与えるフィードロールと、
前記フィードロールと前記レジロールを結び、シートに前記搬送力を与える部材が配備されていない搬送路と、
前記搬送路の、前記レジロール近傍に配備され、シートの、搬送方向の端が通過したことを検知するセンサと、
前記センサがシートの後端が通過したことを検知してから画像形成部へ次に給送するシートの先端が通過したことを検知するまでの間の時間を計時し、該時間が所定時間よりも短い場合には前記第2ニップ領域を形成する一対のロールの回転速度を低下あるいは停止させ、該時間が所定時間よりも長い場合には該回転速度を上昇させる制御部とを備えたことを特徴とするシート給送装置。 In a sheet feeding apparatus that feeds a plurality of sheets stored in a sheet storing unit that stores sheets one by one to an image forming unit that forms an image on the surface of the sheet with a time interval,
A timing provided on the image forming unit side, comprising a pair of rolls whose peripheral surfaces are in contact with each other, and sandwiching the sheet in a first nip region formed between the pair of rolls, and feeding the sheet to the image forming unit A pair of rolls rotating while adjusting the registration roll to feed the sheet to the image forming unit,
The pair of rolls provided on the sheet storage means side, the peripheral surfaces of which are in contact with each other and capable of changing the rotation speed, can be freely changed, and the sheet is sandwiched between second nip regions formed between the pair of rolls. A feed roll that gives the sheet a conveying force toward the registration roll by rotating the roll of
A conveyance path that connects the feed roll and the registration roll and is not provided with a member that applies the conveyance force to the sheet;
A sensor that is disposed in the vicinity of the registration roll of the conveyance path and detects that the end of the sheet in the conveyance direction has passed,
The sensor measures the time from when the trailing edge of the sheet is detected until it is detected that the leading edge of the sheet to be fed next to the image forming unit has passed, and the time is longer than a predetermined time. A control unit that reduces or stops the rotational speed of the pair of rolls forming the second nip region when the time is shorter, and increases the rotational speed when the time is longer than a predetermined time. The sheet feeding device is characterized.
前記シート長さ取得部で取得した前記長さと前記前記第2ニップ領域を形成する一対のロールの回転速度から、前記センサをシートの先端が通過してから該シートの後端が通過するまでの間の見込時間を算出する見込時間算出部とを備え、
前記搬送路の長さは、給送するシートの、搬送方向の長さよりも短いものであり、
前記制御部は、前記センサがシートの先端が通過したことを検知してから該シートの後端が通過したことを検知するまでの間の時間を計時し、該時間が前記見込時間よりも長い場合には、前記第2ニップ領域を形成する一対のロールの回転速度を、前記第1ニップ領域を形成する一対のロールの回転速度よりも低下あるいは停止させるものであることを特徴とする請求項1記載のシート給送装置。 A sheet length acquisition unit for acquiring the length in the conveyance direction of the sheet fed to the image forming unit;
From the length acquired by the sheet length acquisition unit and the rotational speed of a pair of rolls forming the second nip region, from the time when the leading edge of the sheet passes through the sensor until the trailing edge of the sheet passes. An expected time calculation unit for calculating the expected time between
The length of the conveyance path is shorter than the length in the conveyance direction of the sheet to be fed,
The control unit counts a time from when the sensor detects that the leading edge of the sheet has passed to when it detects that the trailing edge of the sheet has passed, and the time is longer than the expected time. In this case, the rotational speed of the pair of rolls forming the second nip region is lower or stopped than the rotational speed of the pair of rolls forming the first nip region. The sheet feeding apparatus according to 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005077116A JP4622603B2 (en) | 2005-03-17 | 2005-03-17 | Sheet feeding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005077116A JP4622603B2 (en) | 2005-03-17 | 2005-03-17 | Sheet feeding device |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006256796A JP2006256796A (en) | 2006-09-28 |
JP2006256796A5 true JP2006256796A5 (en) | 2008-04-10 |
JP4622603B2 JP4622603B2 (en) | 2011-02-02 |
Family
ID=37096452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005077116A Expired - Fee Related JP4622603B2 (en) | 2005-03-17 | 2005-03-17 | Sheet feeding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4622603B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5232526B2 (en) * | 2008-05-08 | 2013-07-10 | 理想科学工業株式会社 | Printing device |
JP5126322B2 (en) * | 2009-12-28 | 2013-01-23 | ブラザー工業株式会社 | Image forming apparatus |
JP2012180189A (en) * | 2011-03-01 | 2012-09-20 | Ricoh Co Ltd | Image forming apparatus |
JP6135322B2 (en) * | 2013-06-14 | 2017-05-31 | セイコーエプソン株式会社 | Printing device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62136442A (en) * | 1985-12-07 | 1987-06-19 | Minolta Camera Co Ltd | Multi-level sheet feeder |
JPH1159965A (en) * | 1997-08-22 | 1999-03-02 | Ricoh Co Ltd | Paper carrying device |
JP2004131241A (en) * | 2002-10-10 | 2004-04-30 | Kyocera Corp | Image forming apparatus |
-
2005
- 2005-03-17 JP JP2005077116A patent/JP4622603B2/en not_active Expired - Fee Related
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