JP5217842B2 - 記録紙給送装置および画像形成装置 - Google Patents
記録紙給送装置および画像形成装置 Download PDFInfo
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- JP5217842B2 JP5217842B2 JP2008246444A JP2008246444A JP5217842B2 JP 5217842 B2 JP5217842 B2 JP 5217842B2 JP 2008246444 A JP2008246444 A JP 2008246444A JP 2008246444 A JP2008246444 A JP 2008246444A JP 5217842 B2 JP5217842 B2 JP 5217842B2
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- Sheets, Magazines, And Separation Thereof (AREA)
Description
111 本体制御部(給送動作開始前制御手段、給送動作開始時制御手段、給送動作中制御手段、給送動作終了時制御手段、給送動作エラー時制御手段)
200 記録紙給送装置
210 記録紙載置台
210a 回動支点
211 ステッピングモータ(駆動源)
213 アイドラギヤ
215、223 ギヤ付ワンウェイクラッチ(駆動力切替手段)
216、217 偏心カムギヤ
218 偏心カム(第1の偏心カム)
218a、219a 長穴
219 偏心カム(第2の偏心カム)
220 給紙コロ
221 給紙コロ駆動軸
222 カム駆動軸(カム駆動伝達手段)
224、225 カム駆動アイドラギヤ
226 カム支持軸
230 圧縮バネ(付勢手段)
231、232 止め輪
240 ユニットガイド板
240a、240b 突起(位相一致部材)
250 偏心カム位置センサ
260 記録紙載置台移動手段
Claims (13)
- 記録紙を積載可能な記録紙載置台と、
前記記録紙載置台を上方に付勢する付勢手段と、
給紙コロ駆動軸の一端部に固定され、前記記録紙載置台に載置された記録紙を給紙する給紙コロと、
前記給紙コロ駆動軸の他端部に回転自在に設けられ回転位置に応じて前記記録紙載置台を下方に押下げる第1の偏心カムと、前記給紙コロ駆動軸と同一軸線上に配置され、回転位置に応じて前記記録紙載置台を下方に押下げる第2の偏心カムと、前記第1の偏心カムから前記第2の偏心カムに駆動力を伝達するカム駆動伝達手段とを有し、前記記録紙載置台に載置された記録紙が前記給紙コロに当接する上昇位置と前記記録紙載置台に載置された記録紙が前記給紙コロから離隔する下降位置との間で前記記録紙載置台を移動させる記録紙載置台移動手段と、
前記給紙コロまたは前記記録紙載置台移動手段の何れかを駆動する駆動源と、
前記第1の偏心カムと前記第2の偏心カムは、同一軸線上で第1の間隔を隔てて前記第1の偏心カムと前記第2の偏心カムが配置される第1の位置と、該第1の位置よりも近接した間隔を隔てて前記第1の偏心カムと前記第2の偏心カムが配置される第2の位置との間で移動可能に構成され、前記第1の偏心カムと前記第2の偏心カムが前記第2の位置にあるとき、前記第1の偏心カムおよび前記第2の偏心カムにそれぞれ係合して、前記第1の偏心カムおよび前記第2の偏心カムの位相を一致させる、筺体に固定された位相一致部材と、
を備えたことを特徴とする記録紙給送装置。 - 前記駆動源が第1の方向に回転するとき、前記記録紙載置台移動手段を駆動し、前記駆動源が第2の方向に回転するとき前記給紙コロ駆動軸を回転させる、一方向クラッチを有する駆動力切替手段を備えたことを特徴とする請求項1に記載の記録紙給送装置。
- 前記カム駆動伝達手段が、
前記給紙コロ駆動軸とは異なる軸線上に配置されたカム駆動軸と、
前記第1の偏心カムに固定されて該第1の偏心カムと一体的に回転する第1の偏心カムギヤおよび前記第2の偏心カムギヤに固定されて該第2の偏心カムギヤと一体的に回転する第2の偏心カムギヤと、
前記カム駆動軸の両端部近傍にそれぞれ固定されるとともに前記第1の偏芯カムギヤおよび前記第2の変心カムギヤとそれぞれ歯合する第1のカム駆動アイドラギヤおよび第2のカム駆動アイドラギヤと、を有し、
前記駆動力切替手段が、
前記カム駆動軸の端部に設けられ、前記駆動源が第1の方向に回転するとき、前記駆動源の回転を前記カム駆動軸に伝達する第1の一方向クラッチと、
給紙コロ駆動軸の端部に設けられ、前記駆動源が第2の方向に回転するとき、前記駆動源の回転を前記給紙コロ駆動軸に伝達する第2の一方向クラッチと、を有することを特徴とする請求項2に記載の記録紙給送装置。 - 前記第1の偏心カムと前記第2の偏心カムが、前記第1の位置または前記第2の位置の何れにあるときにおいても、前記カム駆動伝達手段が前記第1の偏心カムから前記第2の偏心カムに駆動力を伝達する状態となっていることを特徴とする請求項1乃至請求項3の何れかに記載の記録紙給送装置。
- 前記記録紙給送装置の給送動作開始前は、前記駆動源を前記第1の方向に回転させて前記記録紙載置台を前記下降位置に移動させておく給送動作開始前制御手段を備えたことを特徴とする請求項1乃至請求項4の何れかに記載の記録紙給送装置。
- 前記記録紙給送装置の給送動作開始時は、前記駆動源を前記第1の方向に回転させて前記記録紙載置台を前記上昇位置に移動させた後、前記駆動源を前記第2の方向に回転させて前記給紙コロ駆動軸を回転させる給送動作開始時制御手段を備えたことを特徴とする請求項1乃至請求項5の何れかに記載の記録紙給送装置。
- 前記記録紙給送装置の給送動作中は、前記記録紙の給送開始から給送終了まで連続して、前記駆動源を前記第2の方向に回転させて前記給紙コロ駆動軸を回転させる給送動作中制御手段を備えたことを特徴とする請求項1乃至請求項6の何れかに記載の記録紙給送装置。
- 前記記録紙給送装置の給送動作終了時は、前記駆動源を前記第1の方向に回転させて前記記録紙載置台を前記下降位置に移動させる給送動作終了時制御手段を備えたことを特徴とする請求項1乃至請求項7の何れかに記載の記録紙給送装置。
- 前記記録紙給送装置の給送動作中にエラーが発生したときは、前記駆動源の前記第2の方向への回転を停止してから、前記駆動源を前記第1の方向に回転させて前記記録紙載置台を前記下降位置に移動し、前記駆動源を停止する給送動作エラー時制御手段を備えたことを特徴とする請求項1乃至請求項8の何れかに記載の記録紙給送装置。
- 請求項1乃至請求項9の何れかに記載の記録紙給送装置を備えたことを特徴とする画像形成装置。
- 前記画像形成装置が、電子写真複写機であることを特徴とする請求項10に記載の画像形成装置。
- 前記画像形成装置が、レーザビームプリンタであることを特徴とする請求項10に記載の画像形成装置。
- 前記画像形成装置が、ファクシミリ装置であることを特徴とする請求項10に記載の画像形成装置。
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US12/585,487 US8016283B2 (en) | 2008-09-25 | 2009-09-16 | Recording sheet feeder and image forming apparatus providing easy maintenance with simple structure |
CN200910205110.0A CN101683928B (zh) | 2008-09-25 | 2009-09-25 | 记录纸供给装置及图像形成装置 |
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JP2011121765A (ja) * | 2009-12-14 | 2011-06-23 | Canon Inc | シート給送装置 |
US8167300B1 (en) * | 2010-10-29 | 2012-05-01 | Lexmark International, Inc. | Method for determining the amount of media sheets in a media tray in an image forming device |
US8123212B1 (en) * | 2010-10-29 | 2012-02-28 | Lexmark International, Inc. | Method and apparatus for adjusting media positioning and indexing using an encoder in an image forming device |
SG184601A1 (en) * | 2011-03-31 | 2012-10-30 | Cal Comp Prec Singapore Ltd | Depinching mechanism for paper jam removal in printer |
CN103716497A (zh) * | 2012-09-28 | 2014-04-09 | 致伸科技股份有限公司 | 馈纸式扫描装置 |
CN103716498A (zh) * | 2012-09-28 | 2014-04-09 | 致伸科技股份有限公司 | 馈纸式扫描装置 |
JP5836295B2 (ja) * | 2013-02-22 | 2015-12-24 | 京セラドキュメントソリューションズ株式会社 | 給紙装置、およびこれを備えた画像形成装置、画像読取装置 |
CN104290469B (zh) * | 2013-07-17 | 2017-04-19 | 中国建筑设计院有限公司 | 数码打印机纸卷升降系统 |
JP5915609B2 (ja) * | 2013-09-12 | 2016-05-11 | コニカミノルタ株式会社 | 動力伝達装置、画像形成装置及び動力伝達装置の制御方法 |
JP6132863B2 (ja) * | 2014-02-28 | 2017-05-24 | キヤノン株式会社 | 画像形成装置 |
CN104118745B (zh) * | 2014-07-14 | 2016-03-09 | 江苏辰光纸箱机械制造有限公司 | 自动印刷机的托纸板同步升降机构 |
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