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JPH0717288B2 - Sheet feeding device - Google Patents
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JPH0717288B2 - Sheet feeding device - Google Patents

Sheet feeding device

Info

Publication number
JPH0717288B2
JPH0717288B2 JP61263061A JP26306186A JPH0717288B2 JP H0717288 B2 JPH0717288 B2 JP H0717288B2 JP 61263061 A JP61263061 A JP 61263061A JP 26306186 A JP26306186 A JP 26306186A JP H0717288 B2 JPH0717288 B2 JP H0717288B2
Authority
JP
Japan
Prior art keywords
sheet
sheet feeding
feeding device
support member
sensor
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.)
Expired - Fee Related
Application number
JP61263061A
Other languages
Japanese (ja)
Other versions
JPS63117825A (en
Inventor
浩敏 岸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP61263061A priority Critical patent/JPH0717288B2/en
Publication of JPS63117825A publication Critical patent/JPS63117825A/en
Publication of JPH0717288B2 publication Critical patent/JPH0717288B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Description

【発明の詳細な説明】 イ、発明の目的 〔産業上の利用分野〕 本発明は、例えば複写機・プリンタ等のシート収納部か
ら複写材シート(以下、シートと略称する)を一枚ずつ
給送するシート給送装置に関する。特に、そのシート収
納部のシート残量検知に関するものである。
DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the invention [Industrial field of application] The present invention supplies a copy material sheet (hereinafter abbreviated as a sheet) one by one from a sheet storage unit of, for example, a copying machine or a printer. The present invention relates to a sheet feeding device for feeding. In particular, it relates to detection of the remaining amount of sheets in the sheet storage section.

〔従来の技術〕[Conventional technology]

複写機・プリンタ等においては、シート収納部のシート
を常に切らさないようにする必要がある。そのため、シ
ート収納部のシート残量あるいは有無を検知して、シー
ト補給予告あるいはシート無しの表示を出し、シートの
補充追加を促すようにした装置がある。
In copiers, printers, etc., it is necessary to keep the sheets in the sheet storage unit from running out. Therefore, there is a device that detects the remaining amount or the presence or absence of the sheet in the sheet storage unit and outputs a sheet replenishment notice or a no sheet indication to prompt the addition of the sheet.

従来、上記のような装置として、回動自在なアームをシ
ート上に当接させ、アームの回動軸上に固設された遮光
板に対向した位置にシート無し予告用のフォトセンサお
よびシート無し検知用のセンサを配設している。
Conventionally, as the above-mentioned device, a rotatable arm is brought into contact with a seat, and a photo sensor for notifying a sheet and a seat are not provided at a position facing a light shielding plate fixed on a rotating shaft of the arm. A sensor for detection is provided.

そして、シートの積載量の変化に応じて回動変位する遮
光板による上記センサの遮光の有無により、シート無し
予告あるいはシート無し表示を行っている。
Then, depending on the presence or absence of the light shielding of the sensor by the light shielding plate which is rotationally displaced according to the change of the stacking amount of the sheets, the sheet absence notice or the sheet absence display is performed.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

従来のシート給送装置は上記のように構成されているた
め、複数の予告レベルを設定するには、その数だけセン
サを設けることが必要で、構成が複雑で高価となる。ま
た、シート無し予告あるいはシート無し表示検知に係る
遮光板の微少な変位量を検知するためには、各センサの
取付位置の厳密な調整が必要であり、検知精度が低いな
どの問題点があった。
Since the conventional sheet feeding apparatus is configured as described above, in order to set a plurality of notice levels, it is necessary to provide the same number of sensors, which makes the configuration complicated and expensive. Further, in order to detect a slight amount of displacement of the light-shielding plate related to the sheet-free notice or the sheet-free display detection, it is necessary to strictly adjust the mounting position of each sensor, and there are problems such as low detection accuracy. It was

本発明は上記の問題点を解消するためになされたもの
で、センサの取付位置精度の厳密な調整を必要とするこ
となく、複数の予告レベルの設定に1つのセンサで対応
できる検知精度の高いシート給送装置を得ることを目的
とする。
The present invention has been made to solve the above-mentioned problems, and one sensor can deal with the setting of a plurality of advance notice levels with high detection accuracy without requiring strict adjustment of the mounting position accuracy of the sensor. The purpose is to obtain a sheet feeding device.

ロ、発明の構成 〔問題点を解決するための手段〕 本発明は、シート積載板がシートの積載量に応じてシー
トの積載方向に変位し最上位のシートを所定の給紙位置
に保つように構成されたシート収納部と、 前記シート収納部からシートを一枚ずつ給送するシート
給送部とを有するシート給送装置において、 前記シート積載板の変位に追従してシートの積載方向に
変位自在に設けられた支持部材と、 前記支持部材に対してシートの積載方向に相対変位自在
に設けられ前記最上位のシートに当接するレバー部材
と、 前記支持部材と前記レバー部材との相対変位を検知する
センサと、 を具備したことを特徴とするシート給送装置である。
B. Configuration of the Invention [Means for Solving Problems] In the present invention, the sheet stacking plate is displaced in the stacking direction of the sheets according to the stacking amount of the sheets to keep the uppermost sheet at a predetermined sheet feeding position. In a sheet feeding device having a sheet storing section configured as described above, and a sheet feeding section that feeds sheets one by one from the sheet storing section, in a sheet stacking direction following a displacement of the sheet stacking plate. A supporting member provided so as to be displaceable, a lever member provided so as to be displaceable relative to the supporting member in a sheet stacking direction and abutting against the uppermost sheet, and a relative displacement between the supporting member and the lever member. A sheet feeding device comprising: a sensor for detecting

〔作用〕[Action]

本発明におけるシート給送装置は、シートを積載するシ
ート積載板に追従する支持部材と積載されているシート
の最上位のシートに当接するレバー部材との相対的な変
位をセンサで検知するようにし、その相対的な変位の検
知に基づいてシート積載板に積載されているシートの厚
み(積載されているシート束の厚さ)を検知することが
できる。そして、そのシートの厚みの検知に基づいてシ
ート無しまたはシート無し予告を行うことができる。
In the sheet feeding device according to the present invention, the sensor detects relative displacement between the support member that follows the sheet stacking plate on which the sheets are stacked and the lever member that contacts the uppermost sheet of the stacked sheets. The thickness of the sheets stacked on the sheet stacking plate (thickness of the stacked sheet bundle) can be detected based on the detection of the relative displacement. Then, based on the detection of the thickness of the sheet, it is possible to give a sheet-less or sheet-less notice.

〔実施例〕〔Example〕

以下、本発明の実施例を図面について説明する。図にお
いて、カセット1内には、付勢部材2により給送ローラ
3に対して付勢された積載板4上に、シート5が積載さ
れている。上記付勢部材2は図示の圧縮ばねの他、等価
な手段でもよい。
Embodiments of the present invention will be described below with reference to the drawings. In the figure, in a cassette 1, a sheet 5 is stacked on a stacking plate 4 that is biased by a biasing member 2 against a feeding roller 3. The biasing member 2 may be equivalent to the compression spring shown in the figure.

支持部材6は積載板4の変位に追従して変位するよう
に、装置本体に配設された保持手段7に保持されてい
る。この支持部材6の一端側は積載板4に当接し他端側
にはラインセンサ8が固設されている。
The support member 6 is held by a holding means 7 provided in the main body of the apparatus so as to be displaced following the displacement of the stacking plate 4. One end side of the support member 6 is in contact with the stacking plate 4, and the line sensor 8 is fixedly provided on the other end side.

また、上記支持部材6には、レバー部材9がピン6aと長
孔9aとによって相対変位自在に保持されており、この一
端側は最上位のシートに当接し他端側にはラインセンサ
8の遮光部10を有している。
A lever member 9 is held on the support member 6 by a pin 6a and an elongated hole 9a so that the lever member 9 is relatively displaceable. One end of the lever member 9 abuts on the uppermost sheet and the other end of the line sensor 8 is attached. It has a light shielding portion 10.

つぎに動作について説明する。シート積載量に応じて積
載板4が変位すると、この変位に追従して支持部材6が
矢示方向に変位し、遮光部10で遮光されるラインセンサ
8の範囲が変りラインセンサの出力状況が変化する。そ
こで、上記ラインセンサ8の出力Vxを所定の設定レベル
Vcと比較回路11によって比較することにより、シート無
し予告あるいはシート無しの信号を表示手段12に出力す
ることができる。
Next, the operation will be described. When the stacking plate 4 is displaced in accordance with the amount of stacked sheets, the support member 6 is displaced in the direction of the arrow following this displacement, and the range of the line sensor 8 shielded by the light shielding unit 10 is changed to change the output status of the line sensor. Change. Therefore, the output Vx of the line sensor 8 is set to a predetermined set level.
By comparing Vc with the comparison circuit 11, it is possible to output to the display means 12 a notice of no seat or a signal of no seat.

ハ、発明の効果 以上のように、本発明によれば、積載シートの最上位レ
ベルを検知するのではなく、積載シートの厚みを検知す
るように構成したので、複雑な調整を必要とすることな
く、複数の予告レベルの設定に対して簡単に対応でき、
高精度にシート残量を検知することができる効果があ
る。
C. Effect of the Invention As described above, according to the present invention, the thickness of the stacked sheet is detected instead of detecting the uppermost level of the stacked sheet, so that complicated adjustment is required. Without, you can easily respond to the setting of multiple notice levels,
There is an effect that the remaining amount of the sheet can be detected with high accuracy.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明の一実施例によるシート給送装置を示す
横断面図、第2図は表示回路系のブロック図である。 4……積載板、5……シート、6……支持部材、8……
ラインセンサ、9……レバー部材、10……遮光部。
FIG. 1 is a cross sectional view showing a sheet feeding apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a display circuit system. 4 ... Loading plate, 5 ... Sheet, 6 ... Supporting member, 8 ...
Line sensor, 9 ... Lever member, 10 ... Light-shielding part.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】シート積載板がシートの積載量に応じてシ
ートの積載方向に変位し最上位のシートを所定の給紙位
置に保つように構成されたシート収納部と、 前記シート収納部からシートを一枚ずつ給送するシート
給送部とを有するシート給送装置において、 前記シート積載板の変位に追従してシートの積載方向に
変位自在に設けられた支持部材と、 前記支持部材に対してシートの積載方向に相対変位自在
に設けられ前記最上位のシートに当接するレバー部材
と、 前記支持部材と前記レバー部材との相対変位を検知する
センサと、 を具備したことを特徴とするシート給送装置。
1. A sheet accommodating unit configured to displace a sheet stacking plate in a sheet stacking direction according to a stacking amount of sheets to keep the uppermost sheet at a predetermined sheet feeding position, and the sheet storing unit. In a sheet feeding device having a sheet feeding unit that feeds sheets one by one, a support member provided so as to be displaceable in a sheet stacking direction following the displacement of the sheet stacking plate, and the support member On the other hand, a lever member provided so as to be relatively displaceable in the sheet stacking direction and abutting on the uppermost sheet, and a sensor for detecting relative displacement between the support member and the lever member are provided. Sheet feeding device.
【請求項2】前記センサは前記支持部材に固設されたラ
インセンサと、前記レバー部材に設けた遮光部とからな
り、該センサは前記支持部材と前記レバー部材との相対
変位により前記ラインセンサの前記遮光部による遮光範
囲の変化に応じた出力をすることを特徴とする特許請求
の範囲第1項に記載のシート給送装置。
2. The sensor comprises a line sensor fixedly mounted on the support member, and a light-shielding portion provided on the lever member, the sensor being the line sensor due to relative displacement between the support member and the lever member. The sheet feeding device according to claim 1, wherein the sheet feeding device outputs an output in accordance with a change in a light blocking range of the light blocking section.
JP61263061A 1986-11-05 1986-11-05 Sheet feeding device Expired - Fee Related JPH0717288B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61263061A JPH0717288B2 (en) 1986-11-05 1986-11-05 Sheet feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61263061A JPH0717288B2 (en) 1986-11-05 1986-11-05 Sheet feeding device

Publications (2)

Publication Number Publication Date
JPS63117825A JPS63117825A (en) 1988-05-21
JPH0717288B2 true JPH0717288B2 (en) 1995-03-01

Family

ID=17384306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61263061A Expired - Fee Related JPH0717288B2 (en) 1986-11-05 1986-11-05 Sheet feeding device

Country Status (1)

Country Link
JP (1) JPH0717288B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0736932Y2 (en) * 1989-03-15 1995-08-23 カシオ電子工業株式会社 Paper remaining amount detector
US5572630A (en) * 1992-12-10 1996-11-05 Minolta Camera Kabushiki Kaisha Image forming apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5767439A (en) * 1980-10-08 1982-04-24 Toshiba Corp Detector for number of form

Also Published As

Publication number Publication date
JPS63117825A (en) 1988-05-21

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