JPS63104864A - Paper detector - Google Patents
Paper detectorInfo
- Publication number
- JPS63104864A JPS63104864A JP24968386A JP24968386A JPS63104864A JP S63104864 A JPS63104864 A JP S63104864A JP 24968386 A JP24968386 A JP 24968386A JP 24968386 A JP24968386 A JP 24968386A JP S63104864 A JPS63104864 A JP S63104864A
- Authority
- JP
- Japan
- Prior art keywords
- light
- paper
- platen
- shielding body
- photosensor
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 17
- 230000007257 malfunction Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 6
- 238000004020 luminiscence type Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/42—Scales and indicators, e.g. for determining side margins
Landscapes
- Handling Of Sheets (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は紙検装置に係り、特に、用紙の端面を検出する
のに好適な紙検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper inspection device, and particularly to a paper detection device suitable for detecting the end surface of paper.
従来の紙検出装置は、特に、紙移動式のプロッタにおい
ては、紙の両端を検出するために反射形の光センサをプ
ラテン下部に設け、遮光体としてベンキャリッジの僅か
な底面を使用していた。当然、遮光体をプラテンに近づ
ける程、外乱光を遮光するため誤動作しにくくなるが、
逆にセンサ自身の自発光による遮光体からの反射光が増
加するため、自発光による誤動作が生じやすくなるとい
う欠点があった。Conventional paper detection devices, especially in paper-moving plotters, installed reflective optical sensors at the bottom of the platen to detect both ends of the paper, and used the slight bottom surface of the Benn carriage as a light shield. . Naturally, the closer the light shielding body is to the platen, the more likely it will be to malfunction because it will block external light.
On the contrary, since the light reflected from the light shielding body due to the sensor's own self-emission increases, there is a drawback that malfunctions due to self-emission are more likely to occur.
本発明の目的は、あらゆる角度からの外乱光だけでなく
、自発光によるセンサの誤動作をもなくした、最適な紙
検出装置を提供することにある。An object of the present invention is to provide an optimal paper detection device that eliminates sensor malfunctions due to self-luminescence as well as disturbance light from all angles.
（問題点を解決するための手段〕
上記目的は、遮光体をできるだけプラテン上に近づける
ことにより、外乱光をより遮光しゃすくし、さらに光セ
ンサ光路に対し、遮光体の底面を傾けたり、ギザギザに
することによってセンサの自発光の反射光を受光素子に
導かないよう散乱さることにより達成される。(Means for solving the problem) The above purpose is to block the disturbance light even more by bringing the light shield as close as possible to the platen, and also by tilting the bottom of the light shield with respect to the optical sensor optical path or by making it jagged. This is achieved by scattering the self-luminous reflected light of the sensor so as not to guide it to the light receiving element.
反射形光センサは、発光素子から照射された光が紙で反
射され、受光素子で反射光を受光することにより紙の有
無を検知する０紙がないときは、反射光がないので受光
素子に光が入らないが、遮光体がないと外乱光により紙
がないのに有りと判断したり、また、遮光体があるとセ
ンサの自発光による遮光板底面からの反射光によって紙
有と判断することがある。そこで、遮光体の底面を発光
。A reflective optical sensor detects the presence or absence of paper by emitting light from a light emitting element and reflecting it off the paper, and receiving the reflected light at the light receiving element. 0 When there is no paper, there is no reflected light, so the light receiving element does not detect the presence of paper. No light enters, but if there is no light shield, it will be determined that there is paper even though there is no paper due to ambient light, and if there is a light shield, it will be determined that there is paper based on the light reflected from the bottom of the light shield due to the sensor's self-emission. Sometimes. Therefore, the bottom of the light shielding body emits light.
受光の光路面に対し傾斜をもたせるか、■溝面にするこ
とによって１反射光を散乱させれば直接受光素子に反射
光が入らず自発光による誤動作を避けることができる。If one reflected light is scattered by providing an inclination to the light receiving optical path surface or by forming a grooved surface, the reflected light will not directly enter the light receiving element, and malfunctions due to self-luminescence can be avoided.
以下、本発明の一実施例を第１．２．３図により説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 1.2.3.
第１図より、プラテン１は用紙４を面上でスムーズに移
動させるのに十分滑らかで、適当な広がりを持っている
。用紙４はモータ等（図示せず）により矢印方向に往復
移動可能である。プラテン１上には反射形の光センサ３
の光が通過するのに最小限必要な小穴２があり、その小
穴２を中心として、穴の下方にプラテン１面とほぼ垂直
に反射形光センサ３が取付けられている。光センサ３は
発光素子７と受光素子８が搭載されており、用紙４まで
の距離が焦点距離になるような位置に固定されている。From FIG. 1, the platen 1 is smooth enough and has a suitable extent to move the paper 4 smoothly over the surface. The paper 4 can be moved back and forth in the direction of the arrow by a motor or the like (not shown). A reflective optical sensor 3 is mounted on the platen 1.
There is a small hole 2 necessary for the minimum amount of light to pass through, and a reflective optical sensor 3 is mounted below the hole 2 and approximately perpendicular to the surface of the platen 1, centering on the small hole 2. The optical sensor 3 is equipped with a light emitting element 7 and a light receiving element 8, and is fixed at a position where the distance to the paper 4 is the focal length.
しかも、本実施例では外乱光の侵入をできるだけ少なく
するために、焦点距離の長い光センサ３を用い、用紙４
までの距離を長くしている。一方、プラテン１面上を用
紙４が移動可能なギャップを保って、遮光体がプラテン
１の小穴２を隠すように位置している。特に、太陽光な
どの外乱光は光強度が強く、散乱光んどの影響も考える
と、遮光体５はできるだけプラテン１に近い方が望まし
い、また、プロッタの場合、図象を広範囲に見えるよう
にする必要があるため、特別な遮光体を設けるのは難し
く、普通は紙検出の時だけベンキャリッジを小穴２まで
移動させてキャリッジの底面を遮光体としている１本発
明の一実施例である遮光体５の底面は、プラテン１面に
対し傾いた傾斜面６となっており１発光、受光光路面に
対し垂直にならないようにしている。Moreover, in this embodiment, in order to minimize the intrusion of ambient light, the optical sensor 3 with a long focal length is used, and the paper 4 is
increasing the distance to On the other hand, the light shielding body is positioned so as to hide the small holes 2 of the platen 1 while maintaining a gap that allows the paper 4 to move on the surface of the platen 1. In particular, disturbance light such as sunlight has a strong light intensity, and considering the influence of scattered light, it is desirable that the light shield 5 be as close to the platen 1 as possible. Therefore, it is difficult to provide a special light-shielding body, and normally the Benn carriage is moved to the small hole 2 only when paper is detected, and the bottom of the carriage is used as a light-shielding body. The bottom surface of the body 5 is an inclined surface 6 that is inclined with respect to the platen 1 surface, so that it is not perpendicular to the light path plane for one light emission and reception.
以下、動作を説明する０紙検出時には遮光体５が必ずプ
ラテン１の小穴２上に位置しており、外乱光１１が小穴
２に、最悪でも光センサ３に入射しないような高さに保
持し、外乱光１１を遮光している。用紙４がプラテン１
上にある場合、光センサ３内の発光素子７から照射され
た光は紙面裏側で反射され、受光素子８に入射されて紙
が有ることを検知する。一方、用紙４がないと、発光素
子７から照射された光は遮光体５の底面で反射され、底
面がプラテン１に平行ならば、そのまま受光素子８に入
射し、用紙がなくても有と判断してしまうが１本実施例
では傾斜面６としているためセンサ外に反射され受光さ
れない、よって、用紙４がない時は、遮光体５が用紙４
に近くても自発光により誤動作することはない。The operation will be explained below.When detecting zero paper, the light shield 5 is always located above the small hole 2 of the platen 1, and is held at a height such that the disturbance light 11 does not enter the small hole 2, or at worst, the optical sensor 3. , and blocks the disturbance light 11. Paper 4 is platen 1
If the paper is on the top, the light emitted from the light emitting element 7 in the optical sensor 3 is reflected on the back side of the paper surface, enters the light receiving element 8, and detects the presence of the paper. On the other hand, if there is no paper 4, the light emitted from the light emitting element 7 will be reflected on the bottom surface of the light shielding body 5, and if the bottom surface is parallel to the platen 1, it will directly enter the light receiving element 8, and it will be possible even without the paper. However, in this embodiment, since the inclined surface 6 is used, the light is reflected outside the sensor and is not received.Therefore, when there is no paper 4, the light shielding body 5 is
It will not malfunction due to self-emission even if it is close to .
本実施例によれば、外乱光１１だけでなく、自発光によ
り紙検出の誤動作をなくすことができるという効果があ
る。According to this embodiment, there is an effect that malfunctions in paper detection can be eliminated not only by the disturbance light 11 but also by self-luminescence.
第４，５図に本発明の他の実施例を示す。4 and 5 show other embodiments of the present invention.
第４図では、遮光体５の底面をＶ溝面とし、発光した光
に対しランダムな方向に散乱させるようにしたものであ
る。■溝面の形状は規則的でも不規則でも、さらにはク
ロスカットされても構わない、要するに光センサ３から
の光を他方に散乱できるような形状であればよい。In FIG. 4, the bottom surface of the light shielding body 5 has a V-groove surface, so that the emitted light is scattered in random directions. (2) The shape of the groove surface may be regular or irregular, or even cross-cut, as long as it can scatter the light from the optical sensor 3 to the other side.
第５図は、遮光体５の底面をなくし、内部が空洞１０を
持つ構造としたものである。外乱光１１に対しては第１
，３図での実施例効果と同様だが。FIG. 5 shows a structure in which the bottom surface of the light shielding body 5 is eliminated and the interior has a cavity 10. For the disturbance light 11, the first
, but similar to the effect of the embodiment shown in Figure 3.
自発光は空洞１０内に導かれ、光の反射強度を弱めるだ
けでなく、反射点を大幅に変えることにより受光素子８
への入射を極力小さくしたものである。The self-luminous light is guided into the cavity 10, which not only weakens the reflected intensity of the light but also greatly changes the reflection point, thereby increasing the light receiving element 8.
It is designed to minimize the incidence on the
第４，５図の他の実施例においても、自発光による紙検
出の誤動作をなくすることができるという効果がある。The other embodiments shown in FIGS. 4 and 5 also have the effect of eliminating paper detection errors due to self-luminescence.
以上から本発明によれば、外乱光を遮光するだけでなく
、光センサの発光する光による反射光をも受光素子へ導
くことがないため１紙がないときの誤動作をなくすると
いう効果がある。As described above, according to the present invention, not only is it possible to block external light, but also the reflected light from the light emitted by the optical sensor is not guided to the light receiving element, which has the effect of eliminating malfunctions when there is no paper. .
第１図は本発明の一実施例の紙がプラテン上にある時の
センサの光路を示した図、第２図は第１図の側面図、第
３図は紙がない時のセンサの光路を示した図、第４図、
第５図は本発明の他の実施例を示した図である。
１・・・プラテン、２・・・小穴、３・・・光センサ、
４・・・用紙、５・・・遮光体、６・・・傾斜面、７・
・・発光素子、８・・・受光素子、９・・・ギザギザ面
、１０・・・空洞、１１・・・外乱光。Figure 1 is a diagram showing the optical path of the sensor when paper is on the platen according to an embodiment of the present invention, Figure 2 is a side view of Figure 1, and Figure 3 is the optical path of the sensor when there is no paper. Figure 4 shows the
FIG. 5 is a diagram showing another embodiment of the present invention. 1...Platen, 2...Small hole, 3...Light sensor,
4... Paper, 5... Light shielding body, 6... Inclined surface, 7...
...Light emitting element, 8... Light receiving element, 9... Jagged surface, 10... Cavity, 11... Disturbing light.
Claims (1)
方には光路が前記プラテンの小穴を通るように反射形光
センサが、他方には遮光体が前記プラテンと間隔をおい
て設けられた紙検出装置において、前記遮光体のプラテ
ンに対向する面を前記光センサ発光、受光光路面に対し
傾斜をもたせたことを特徴とする紙検出装置。 ２、特許請求の範囲第１項において、前記遮光体のプラ
テンに対向する面をＶ溝面としたことを特徴とする紙検
出装置。 ３、特許請求の範囲第１項において、前記遮光体の前記
小穴に対向する部分に空洞を設けたことを特徴とする紙
検出装置。[Claims] 1. A platen having a small hole, and a reflective optical sensor on one side of the platen so that an optical path passes through the small hole of the platen, and a light shield on the other side of the platen. A paper detecting device provided at intervals, wherein a surface of the light shielding body facing the platen is inclined with respect to a light path surface of the light emitting and receiving light of the light sensor. 2. The paper detection device according to claim 1, wherein the surface of the light shielding body facing the platen is a V-groove surface. 3. The paper detection device according to claim 1, characterized in that a cavity is provided in a portion of the light shielding body facing the small hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24968386A JPS63104864A (en) | 1986-10-22 | 1986-10-22 | Paper detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24968386A JPS63104864A (en) | 1986-10-22 | 1986-10-22 | Paper detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63104864A true JPS63104864A (en) | 1988-05-10 |
Family
ID=17196648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24968386A Pending JPS63104864A (en) | 1986-10-22 | 1986-10-22 | Paper detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63104864A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04191235A (en) * | 1990-11-27 | 1992-07-09 | Tokyo Electric Co Ltd | Sheet detector |
| EP1065067A1 (en) * | 1999-06-28 | 2001-01-03 | Seiko Precision Inc. | Printer |
| JP2001269904A (en) * | 2000-03-24 | 2001-10-02 | Max Co Ltd | Electric stapler |
| JP2004095560A (en) * | 2003-10-06 | 2004-03-25 | Matsushita Electric Works Ltd | Fall detection switch |
| JP2006000520A (en) * | 2004-06-21 | 2006-01-05 | Sekiyu Ri | Input game medium detection device |
| JP2009298579A (en) * | 2008-06-17 | 2009-12-24 | Sharp Corp | Recording sheet conveying device and image processing device equipped with the same |
| US7871216B2 (en) * | 2005-12-19 | 2011-01-18 | Brother Kogyo Kabushiki Kaisha | Medium supporting member and image forming apparatus |
| US20110293346A1 (en) * | 2010-05-28 | 2011-12-01 | Canon Finetech Inc. | Conveying device and printing apparatus using same |
| WO2013111283A1 (en) * | 2012-01-25 | 2013-08-01 | 富士通フロンテック株式会社 | Medium detection device and medium conveyance device |
| JP2015184166A (en) * | 2014-03-25 | 2015-10-22 | サトーホールディングス株式会社 | Sensor unit for printing medium, and printer |
| JP2018154016A (en) * | 2017-03-17 | 2018-10-04 | セイコーエプソン株式会社 | Printer |
| JP2021528120A (en) * | 2018-05-14 | 2021-10-21 | ガンブロ・ルンディア・エービーＧａｍｂｒｏ Ｌｕｎｄｉａ Ａｂ | Fluid temperature control device and extracorporeal blood treatment device for extracorporeal blood treatment device. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039580A (en) * | 1983-08-12 | 1985-03-01 | Matsushita Electric Ind Co Ltd | Paper detecting device |
-
1986
- 1986-10-22 JP JP24968386A patent/JPS63104864A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039580A (en) * | 1983-08-12 | 1985-03-01 | Matsushita Electric Ind Co Ltd | Paper detecting device |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04191235A (en) * | 1990-11-27 | 1992-07-09 | Tokyo Electric Co Ltd | Sheet detector |
| EP1065067A1 (en) * | 1999-06-28 | 2001-01-03 | Seiko Precision Inc. | Printer |
| US6558055B1 (en) | 1999-06-28 | 2003-05-06 | Seiko Precision Inc. | Printer |
| JP2001269904A (en) * | 2000-03-24 | 2001-10-02 | Max Co Ltd | Electric stapler |
| JP2004095560A (en) * | 2003-10-06 | 2004-03-25 | Matsushita Electric Works Ltd | Fall detection switch |
| JP2006000520A (en) * | 2004-06-21 | 2006-01-05 | Sekiyu Ri | Input game medium detection device |
| US7871216B2 (en) * | 2005-12-19 | 2011-01-18 | Brother Kogyo Kabushiki Kaisha | Medium supporting member and image forming apparatus |
| JP2009298579A (en) * | 2008-06-17 | 2009-12-24 | Sharp Corp | Recording sheet conveying device and image processing device equipped with the same |
| US20110293346A1 (en) * | 2010-05-28 | 2011-12-01 | Canon Finetech Inc. | Conveying device and printing apparatus using same |
| US8882372B2 (en) | 2010-05-28 | 2014-11-11 | Canon Finetech, Inc. | Conveying device utilizing suction unit to attract print medium and printing apparatus using same |
| WO2013111283A1 (en) * | 2012-01-25 | 2013-08-01 | 富士通フロンテック株式会社 | Medium detection device and medium conveyance device |
| JP2015184166A (en) * | 2014-03-25 | 2015-10-22 | サトーホールディングス株式会社 | Sensor unit for printing medium, and printer |
| JP2018154016A (en) * | 2017-03-17 | 2018-10-04 | セイコーエプソン株式会社 | Printer |
| JP2021528120A (en) * | 2018-05-14 | 2021-10-21 | ガンブロ・ルンディア・エービーＧａｍｂｒｏ Ｌｕｎｄｉａ Ａｂ | Fluid temperature control device and extracorporeal blood treatment device for extracorporeal blood treatment device. |
| US11951244B2 (en) | 2018-05-14 | 2024-04-09 | Gambro Lundia Ab | Fluid temperature control device for an extracorporeal blood treatment apparatus and extracorporeal blood treatment apparatus |
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