JP2752935B2 - Light emission amount adjustment device for printer media detection sensor - Google Patents

Light emission amount adjustment device for printer media detection sensor

Info

Publication number
JP2752935B2
JP2752935B2 JP7265298A JP26529895A JP2752935B2 JP 2752935 B2 JP2752935 B2 JP 2752935B2 JP 7265298 A JP7265298 A JP 7265298A JP 26529895 A JP26529895 A JP 26529895A JP 2752935 B2 JP2752935 B2 JP 2752935B2
Authority
JP
Japan
Prior art keywords
medium
light
light emission
thickness
printer
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 - Lifetime
Application number
JP7265298A
Other languages
Japanese (ja)
Other versions
JPH09113230A (en
Inventor
博己 立山
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.)
NEC Computertechno Ltd
Original Assignee
NEC Computertechno Ltd
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 NEC Computertechno Ltd filed Critical NEC Computertechno Ltd
Priority to JP7265298A priority Critical patent/JP2752935B2/en
Publication of JPH09113230A publication Critical patent/JPH09113230A/en
Application granted granted Critical
Publication of JP2752935B2 publication Critical patent/JP2752935B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、プリンタの媒体検
知用センサの発光量調節装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for adjusting a light emission amount of a sensor for detecting a medium of a printer.

【０００２】[0002]

【従来の技術】従来のインサータ方式プリンタでは、イ
ンサータに設けられた媒体検知用センサの発光量レベル
は、挿入された媒体の種類に応じてフレキシブルに変化
することはなく常に一定であった。2. Description of the Related Art In a conventional inserter type printer, the light emission level of a medium detecting sensor provided in an inserter does not change flexibly according to the type of inserted medium, and is always constant.

【０００３】[0003]

【発明が解決しようとする課題】この従来の技術は、非
常に薄い紙が挿入された場合、発光（光源）から発せら
れた光は、ほとんど媒体を透過するため、媒体を検知で
きない場合があった。また、偶然媒体の挿入を検知でき
ても、媒体の位置決め等のセンサを使用する制御はいず
れも動作が不安定で、それに付随する様々な障害の誘因
となる可能性があった。According to this conventional technique, when very thin paper is inserted, the light emitted from the light emission (light source) hardly passes through the medium, so that the medium cannot be detected in some cases. Was. In addition, even if the insertion of the medium can be detected by accident, the control using the sensor such as the positioning of the medium is unstable in operation, and there is a possibility of causing various troubles accompanying the operation.

【０００４】[0004]

【課題を解決するための手段】本発明のプリンタの媒体
検知センサの発光量調節方式は、プリンタ筐体に設けら
れオペレータが押下することにより媒体の挿入をプリン
タの制御プログラムに通知する媒体挿入スイッチと、媒
体挿入口に設けられ挿入された媒体の厚さを検知する媒
体厚検知手段と、媒体の厚さ検知，媒体搬送，印字等の
制御を行うプリンタ制御手段と、インサータ上に設けら
れた光源および受光センサと、前記媒体厚検知手段で検
出した挿入媒体の厚さを基に前記光源の発光量を最適に
調節する発光量調節手段を有している。According to the present invention, there is provided a method for adjusting the light emission amount of a medium detection sensor of a printer, comprising a medium insertion switch provided in a printer housing for notifying an insertion of a medium to a printer control program when an operator presses the medium. A medium thickness detecting means provided in the medium insertion opening to detect the thickness of the inserted medium; a printer control means for controlling the medium thickness detection, medium conveyance, printing, and the like; and a printer provided on the inserter. A light source and a light receiving sensor; and a light emission amount adjusting means for optimally adjusting the light emission amount of the light source based on the thickness of the insertion medium detected by the medium thickness detecting means.

【０００５】[0005]

【発明の実施の形態】次に、本発明について図面を参照
して説明する。Next, the present invention will be described with reference to the drawings.

【０００６】図１は、本発明の一実施形態を示すブロッ
ク図である。媒体挿入スイッチ１はプリンタのインサー
タに媒体を挿入しても、媒体が非常に薄い、或いは光源
の発光量が非常に強い等の理由により、媒体を検知でき
ない場合に、オペレータが該スイッチを押下することに
よって、媒体の挿入をプリンタ制御手段に通知するため
のものである。受光センサ２は、インサータ上の媒体の
搬送面をはさんで、光源６と対向する位置に設けられ、
光源６から発せられた光を受光する。媒体が挿入される
と光源から発せられた光を遮るため、受光量が減少する
ことによって、媒体の挿入を検知しプリンタ制御手段に
通知する。FIG. 1 is a block diagram showing an embodiment of the present invention. The medium insertion switch 1 is pressed by an operator when the medium cannot be detected because the medium is very thin or the light emission amount of the light source is very strong even if the medium is inserted into the inserter of the printer. This is for notifying the printer control means of the insertion of the medium. The light receiving sensor 2 is provided at a position facing the light source 6 with the medium transport surface on the inserter interposed therebetween.
The light emitted from the light source 6 is received. When the medium is inserted, the light emitted from the light source is blocked, so that the amount of received light is reduced, thereby detecting the insertion of the medium and notifying the printer control means.

【０００７】尚、光源と受光センサは対となり、インサ
ータ上に複数存在して、媒体の位置決め、媒体ジャムの
検知等に使用される。プリンタ制御手段３は、媒体の厚
さ検知，媒体の搬送，印字等のプリンタの全体的な制御
を行う。媒体厚検知手段４は、挿入された媒体を搬送面
と垂直方向に上下移動可能な帆走ローラと押圧ローラで
挟みこむことによって、搬送ローラの基準位置からの移
動量によって媒体の厚さを機械的に検出する手段であ
る。発光両調節手段５は、媒体厚検知手段４で検出した
媒体の厚さに応じて光源の発光量を調節する。薄い媒体
に対しては発光量を少なくするよう調節する。尚、発光
量は、受光センサ２での受光量が媒体の存在を検出でき
るレベルまで減少させる。A plurality of light sources and light receiving sensors are provided on an inserter and used for positioning a medium, detecting a medium jam, and the like. The printer control means 3 performs overall control of the printer, such as detection of the thickness of the medium, conveyance of the medium, and printing. The medium thickness detecting means 4 mechanically detects the thickness of the medium by the amount of movement of the conveyance roller from a reference position by nipping the inserted medium between a sailing roller and a pressing roller which can move up and down in a direction perpendicular to the conveyance surface. This is a means for detecting. The light emission adjusting means 5 adjusts the light emission amount of the light source according to the thickness of the medium detected by the medium thickness detecting means 4. Adjustment is made to reduce the amount of light emission for a thin medium. The amount of light emission is reduced to a level at which the amount of light received by the light receiving sensor 2 can detect the presence of the medium.

【０００８】次に、図２を用いて動作を説明する。図２
は本実施例のプリンタの発光量調節方式を説明した図で
ある。ｙ軸は受光センサ２での受光量を示し、ｘ軸は媒
体の厚さを示す。同じ紙質であれば、受光量ｙは媒体の
厚さｘの関数であり、ｙ＝ｆ（ｘ）＋Ｃ（Ｃは定数）で
表される。ここでは簡単の為に、受光量ｙは媒体の厚さ
ｘに反比例するものとして説明する。Next, the operation will be described with reference to FIG. FIG.
FIG. 3 is a diagram illustrating a light emission amount adjustment method of the printer of the present embodiment. The y-axis indicates the amount of light received by the light receiving sensor 2, and the x-axis indicates the thickness of the medium. For the same paper quality, the received light amount y is a function of the thickness x of the medium, and is represented by y = f (x) + C (C is a constant). Here, for the sake of simplicity, the description will be made assuming that the amount of received light y is inversely proportional to the thickness x of the medium.

【０００９】光源６から発光された光は受光センサ２で
受光される。この時の受光量をＣ1とする。媒体がイン
サータ７の媒体挿入口に挿入されると、媒体が光を遮る
ために受光センサの受光量は減少する。これが予め定め
られた閾値Ｃ0 より低くなると、プリンタ制御手段３は
媒体が存在すると認識し、媒体の搬送を開始する。例え
ば、適度な厚さＡ0 の媒体が挿入された場合、受光量は
Ｂ0 となり、閾値Ｃ0より低いためプリンタ制御手段は
媒体ありと判断する。ところが、光の透過率が高い、非
常に薄い媒体（媒体厚さＡ1 ）が挿入された場合、受光
センサ２の受光量Ｂ1 は閾値Ｃ0 よりも低くならず、媒
体の存在を検知できない。この場合は、透過光センサに
よる媒体の検知は困難であるため、オペレータが媒体挿
入スイッチ１を押下することによって、媒体の挿入をプ
リンタ制御手段３に通知する。プリンタ制御手段３で
は、媒体の挿入を検知すると、媒体厚検知手段４に対
し、媒体の厚さ検知実行を指示する。Light emitted from the light source 6 is received by the light receiving sensor 2. The amount of light received at this time is C 1. When the medium is inserted into the medium insertion slot of the inserter 7, the amount of light received by the light receiving sensor decreases because the medium blocks light. If this is lower than the threshold value C 0 of predetermined printer control unit 3 recognizes that there is a medium, to start conveying of the medium. For example, when a medium having an appropriate thickness A 0 is inserted, the amount of received light is B 0 , which is lower than the threshold C 0 , so that the printer control unit determines that there is a medium. However, when a very thin medium (medium thickness A 1 ) having a high light transmittance is inserted, the light receiving amount B 1 of the light receiving sensor 2 does not become lower than the threshold value C 0 and the presence of the medium cannot be detected. . In this case, since it is difficult to detect the medium by the transmitted light sensor, the operator presses the medium insertion switch 1 to notify the printer control unit 3 of the insertion of the medium. Upon detecting the insertion of the medium, the printer control unit 3 instructs the medium thickness detection unit 4 to execute the medium thickness detection.

【００１０】媒体厚検知手段４は、搬送ローラを徐々に
下げ、媒体を押圧ローラとの間に挟み込み、搬送ローラ
の移動量により媒体の厚さを検知する。この厚さの測定
値は、発光量調節手段５に入力される。発光量調節手段
５は、厚さの測定値に応じて光源６の発光量を調節す
る。例えば、媒体の厚さが予め定められた規定値より薄
い場合、その差分に比例して発光量を小さくする。この
時、媒体が無い場合の受光センサ２の受光量をＣ2 とす
る。プリンタ制御手段３は、この新たに変更された発光
量で再度媒体の検知を行う。[0010] The medium thickness detecting means 4 gradually lowers the conveying roller, sandwiches the medium between the pressing roller, and detects the thickness of the medium based on the amount of movement of the conveying roller. The measured value of the thickness is input to the light emission amount adjusting means 5. The light emission amount adjusting means 5 adjusts the light emission amount of the light source 6 according to the measured value of the thickness. For example, when the thickness of the medium is smaller than a predetermined value, the light emission amount is reduced in proportion to the difference. At this time, the amount of light received by the light receiving sensor 2 when the medium is not a C 2. The printer control unit 3 detects the medium again with the newly changed light emission amount.

【００１１】この時の受光量はＢ2 となるが、この値も
閾値Ｃ0 より大きいため、プリンタ制御手段３は媒体の
を検知できない。このように媒体の検知ができない場合
には、プリンタ制御手段３は、発光量調節手段５に対し
光源６の発光量を１レベル下げるよう指示し、媒体の再
検知を試みる。プリンタ制御手段３は、受光量がＢ3と
なり閾値Ｃ0 よりも小さくなるまでこれを繰り返す。こ
のようにして、インサータ上の全ての光源の発光量を適
正に調節する。The amount of light received at this time is B 2 , but since this value is also larger than the threshold value C 0 , the printer control means 3 cannot detect the medium. If the medium cannot be detected in this way, the printer control means 3 instructs the light emission amount adjusting means 5 to lower the light emission amount of the light source 6 by one level, and tries to detect the medium again. The printer control unit 3 repeats this until received light amount becomes smaller than B 3 next threshold C 0. In this way, the light emission amounts of all the light sources on the inserter are properly adjusted.

【００１２】[0012]

【発明の効果】以上説明したように、本発明は、媒体の
厚さを検知する媒体厚検知手段をインサータの媒体挿入
口に設け、媒体を吸入する前に検出した媒体の厚さを基
に、インサータ上の、媒体の搬送面を境に受光センサと
対向して設置された全ての光源の発光量を最適に調節す
ることによって、非常に薄い媒体の取り扱いを可能とす
る効果がある。As described above, according to the present invention, the medium thickness detecting means for detecting the thickness of the medium is provided at the medium insertion opening of the inserter, and the medium thickness is detected based on the thickness of the medium detected before sucking the medium. An extremely thin medium can be handled by optimally adjusting the light emission amounts of all the light sources installed on the inserter and facing the light receiving sensor with the medium conveyance surface as a boundary.

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

【図１】本発明の一実施形態をを示すブロック図であ
る。FIG. 1 is a block diagram showing one embodiment of the present invention.

【図２】本実施例のプリンタの発光量調節方法を説明す
るためのグラフである。FIG. 2 is a graph for explaining a method of adjusting a light emission amount of the printer of the embodiment.

【符号の説明】[Explanation of symbols]

１ 媒体挿入スイッチ ２ 受光センサ ３ プリンタ制御手段 ４ 媒体厚検知手段 ５ 発光量調節手段 ６ 光源 REFERENCE SIGNS LIST 1 medium insertion switch 2 light receiving sensor 3 printer control means 4 medium thickness detecting means 5 light emission amount adjusting means 6 light source

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−77968（ＪＰ，Ａ) 特開 平７−206222（ＪＰ，Ａ) 特開 平１−134588（ＪＰ，Ａ) 特開 平４−32441（ＪＰ，Ａ) 特開 平７−198344（ＪＰ，Ａ) 特開 平２−70473（ＪＰ，Ａ) 特開 昭60−85385（ＪＰ，Ａ) 特開 昭59−39645（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B41J 11/42 B41J 29/48 B65H 7/14 G01B 11/06 G01V 8/10────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-77968 (JP, A) JP-A-7-206222 (JP, A) JP-A-1-134588 (JP, A) JP-A-4- 32441 (JP, A) JP-A-7-198344 (JP, A) JP-A-2-70473 (JP, A) JP-A-60-85385 (JP, A) JP-A-59-39645 (JP, A) (58) Field surveyed (Int.Cl. 6 , DB name) B41J 11/42 B41J 29/48 B65H 7/14 G01B 11/06 G01V 8/10

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 プリンタ匡体に設けられオペレータが押
下することにより媒体の挿入をプリンタの制御プログラ
ムに通知する媒体挿入スイッチと、媒体挿入口に設けら
れ挿入された媒体の厚さを検知する媒体厚検知手段と、
媒体の厚さ検知，媒体搬送，印字等の制御を行うプリン
タ制御手段と、インサータ上に設けられた光源および受
光センサと、前記媒体厚検知手段で検出した挿入媒体の
厚さを基に前記光源の発光量を最適に調節する発光量調
節手段とを含むことを特徴とするプリンタの媒体検知セ
ンサの発光量調整装置。1. A medium insertion switch provided in a printer housing for notifying a control program of a printer of insertion of a medium when pressed by an operator, and a medium provided in a medium insertion port and detecting a thickness of the inserted medium. Thickness detection means,
Printer control means for detecting medium thickness detection, medium conveyance, printing, etc., a light source and a light receiving sensor provided on an inserter, and the light source based on the thickness of the inserted medium detected by the medium thickness detection means A light emission amount adjusting device for optimally adjusting the light emission amount of the printer.
JP7265298A 1995-10-13 1995-10-13 Light emission amount adjustment device for printer media detection sensor Expired - Lifetime JP2752935B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7265298A JP2752935B2 (en) 1995-10-13 1995-10-13 Light emission amount adjustment device for printer media detection sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7265298A JP2752935B2 (en) 1995-10-13 1995-10-13 Light emission amount adjustment device for printer media detection sensor

Publications (2)

Publication Number Publication Date
JPH09113230A JPH09113230A (en) 1997-05-02
JP2752935B2 true JP2752935B2 (en) 1998-05-18

Family

ID=17415266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7265298A Expired - Lifetime JP2752935B2 (en) 1995-10-13 1995-10-13 Light emission amount adjustment device for printer media detection sensor

Country Status (1)

Country Link
JP (1) JP2752935B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3832364B2 (en) * 2002-03-19 2006-10-11 セイコーエプソン株式会社 Recording device
US7950767B2 (en) 2007-02-23 2011-05-31 Kabushiki Kaisha Toshiba Image forming apparatus
JP4898553B2 (en) * 2007-05-22 2012-03-14 株式会社リコー Double feed detection device, image forming device
JP2009001394A (en) * 2007-06-22 2009-01-08 Ricoh Co Ltd Image forming device
CN110536851B (en) 2017-04-21 2021-01-22 惠普发展公司，有限责任合伙企业 Sensor calibration
US11358820B2 (en) 2017-04-21 2022-06-14 Hewlett-Packard Development Company, L.P. Media bin sensors

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