JP2012106812A5 - - Google Patents

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Publication number
JP2012106812A5
JP2012106812A5 JP2010255309A JP2010255309A JP2012106812A5 JP 2012106812 A5 JP2012106812 A5 JP 2012106812A5 JP 2010255309 A JP2010255309 A JP 2010255309A JP 2010255309 A JP2010255309 A JP 2010255309A JP 2012106812 A5 JP2012106812 A5 JP 2012106812A5
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Japan
Prior art keywords
motor
top sheet
driving
lift
reached
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JP2010255309A
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Japanese (ja)
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JP5680942B2 (en
JP2012106812A (en
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Priority to JP2010255309A priority Critical patent/JP5680942B2/en
Priority claimed from JP2010255309A external-priority patent/JP5680942B2/en
Publication of JP2012106812A publication Critical patent/JP2012106812A/en
Publication of JP2012106812A5 publication Critical patent/JP2012106812A5/ja
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Publication of JP5680942B2 publication Critical patent/JP5680942B2/en
Expired - Fee Related legal-status Critical Current
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Description

積載板201に積載された複数の記録シートのうち最上位に位置する記録シート(トップシート)が所定位置に到達するとピックアップローラ22へ当接する。以降、ピックアップローラ22は、トップシートのリフトアップによって、上昇することになる。ピックアップローラ22が上昇するにしたがって、フラグ211が回動軸209を中心に回動する。紙面高さセンサ210は、発光素子と受光素子とを備える。フラグ211によって発光素子から受光素子へ向かう光が遮断されると、紙面高さセンサ210は、光が遮断されたこと(もはやリフトアップが不要であること)を示す情報をプリンタ制御部302に出力する。ここでは、トップシートがリフトアップ不要な高さに到達すると、紙面高さセンサ210はオン信号を出力する。一方、トップシートがリフトアップ不要な高さに到達していなければ、紙面高さセンサ210はオフ信号を出力する。紙面高さセンサ210は、トップシートが所定位置に到達しているかどうかを検知する検知手段として機能する。プリンタ制御部302は、光が遮断されたことを示す情報を検出すると、モータ制御部303へ停止指示を送信する。停止指示を受信すると、モータ制御部303は、モータ205の駆動を停止する。 When the uppermost recording sheet (top sheet) among the plurality of recording sheets stacked on the stacking plate 201 reaches a predetermined position, the recording sheet contacts the pickup roller 22. Thereafter, the pickup roller 22 is lifted by lifting the top sheet. As the pickup roller 22 moves up, the flag 211 rotates about the rotation shaft 209. The paper surface height sensor 210 includes a light emitting element and a light receiving element. When light traveling from the light emitting element to the light receiving element is blocked by the flag 211, the sheet surface height sensor 210, the information indicating that the light is shut off (that longer lift-up is not required) to the printer control unit 302 Output. Here, when the top sheet reaches a height that does not require lift-up, the paper surface height sensor 210 outputs an ON signal. On the other hand, if the top sheet has not reached a height that does not require lift-up, the paper surface height sensor 210 outputs an off signal. The paper surface height sensor 210 functions as a detection unit that detects whether or not the top sheet has reached a predetermined position. When the printer control unit 302 detects information indicating that light is blocked, the printer control unit 302 transmits a stop instruction to the motor control unit 303. When receiving the stop instruction, the motor control unit 303 stops driving the motor 205.

S501で、プリンタ制御部302は、紙面高さセンサ210からの出力信号がオフ状態かオン状態であるかを判定する。時刻T0において出力信号がオフ状態である。このように紙面高さセンサ210の出力信号がオフ状態であれば、S502に進む。プリンタ制御部302は、カウンタをスタートさせ、カウント値がt1秒(例:2秒)を超えたかどうかを判定する。以降でも、カウンタを用いて時間を計時するものとする。カウント値がt1秒を超えると、S503に進む。図6において、時刻T0からT1までの期間がt1秒となっている。 In step S <b> 501, the printer control unit 302 determines whether the output signal from the paper surface height sensor 210 is off or on. At time T0, the output signal is off. If the output signal of the paper surface height sensor 210 is off as described above, the process proceeds to S502 . Printer control unit 302, the counter starts a count value t1 seconds: determining if more than (Example 2 seconds). Thereafter, the time is counted using the counter. When the count value exceeds t1 seconds, the process proceeds to S503. In FIG. 6, the period from time T0 to T1 is t1 seconds.

Claims (1)

複数のシートが積載される積載板と、
前記積載板をリフトアップするリフトアップ手段と、
前記積載板に積載された複数のシートのうち最上位に位置するトップシートをピックアップするピックアップ手段と、
前記トップシートが所定位置に到達しているかどうかを検知する検知手段と、
第1方向に回転することで前記リフトアップ手段を駆動し、前記第1方向と反対の第2方向に回転することで前記ピックアップ手段を駆動するモータを含む駆動手段と、
記モータの回転方向と前記モータに供給される電流の値を制御する制御手段と
を備え、
前記制御手段は、前記トップシートが所定位置に到達したことを前記検知手段が検知したことで前記モータを停止させる際に、前記第2方向に予め定められた回転量だけ回転するよう前記モータを制御してから前記モータを停止させることを特徴とするシートフィード装置。
A loading plate on which a plurality of sheets are stacked;
Lift-up means for lifting up the loading plate;
Pick-up means for picking up the top sheet located at the top of the plurality of sheets stacked on the stacking plate;
Detecting means for detecting whether the top sheet has reached a predetermined position;
Driving means including a motor for driving the lift-up means by rotating in a first direction and driving the pickup means by rotating in a second direction opposite to the first direction;
And control means for controlling the value of current supplied to the direction of rotation of the front SL motor motor,
The control means controls the motor to rotate by a predetermined rotation amount in the second direction when the motor is stopped when the detection means detects that the top sheet has reached a predetermined position. A sheet feeding apparatus, wherein the motor is stopped after being controlled.
JP2010255309A 2010-11-15 2010-11-15 Sheet feeding apparatus and image forming apparatus Expired - Fee Related JP5680942B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010255309A JP5680942B2 (en) 2010-11-15 2010-11-15 Sheet feeding apparatus and image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010255309A JP5680942B2 (en) 2010-11-15 2010-11-15 Sheet feeding apparatus and image forming apparatus

Publications (3)

Publication Number Publication Date
JP2012106812A JP2012106812A (en) 2012-06-07
JP2012106812A5 true JP2012106812A5 (en) 2014-01-09
JP5680942B2 JP5680942B2 (en) 2015-03-04

Family

ID=46492898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2010255309A Expired - Fee Related JP5680942B2 (en) 2010-11-15 2010-11-15 Sheet feeding apparatus and image forming apparatus

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JP (1) JP5680942B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150088106A (en) 2014-01-23 2015-07-31 삼성전자주식회사 Image forming apparatus, control method of paper feeding thereof and computer-readable recording medium
JP6335598B2 (en) * 2014-04-09 2018-05-30 キヤノン株式会社 Sheet feeding apparatus and image forming apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03223030A (en) * 1990-01-30 1991-10-02 Ricoh Co Ltd Paper feeder
JPH08308293A (en) * 1995-04-28 1996-11-22 Ricoh Co Ltd Stepping motor driver and image reader using the driver
JP2001094735A (en) * 1999-09-17 2001-04-06 Ricoh Co Ltd Image reader

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