JPS6371046A - Device for detecting presence of recording sheet - Google Patents
Device for detecting presence of recording sheetInfo
- Publication number
- JPS6371046A JPS6371046A JP21512486A JP21512486A JPS6371046A JP S6371046 A JPS6371046 A JP S6371046A JP 21512486 A JP21512486 A JP 21512486A JP 21512486 A JP21512486 A JP 21512486A JP S6371046 A JPS6371046 A JP S6371046A
- Authority
- JP
- Japan
- Prior art keywords
- light
- recording paper
- pin
- plate
- hole
- 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 description 3
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Accessory Devices And Overall Control Thereof (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、複写機、ファクシミリ、プリンター等に用い
られる記録紙の有無を検出する記録紙有無検出装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording paper presence/absence detection device for detecting the presence or absence of recording paper used in copying machines, facsimile machines, printers, and the like.
［従来の技術］
従来、この種の記録紙有無検出装置は、例えば第３図及
び７ｇ４図に示すように記録紙１を載置するプレート２
を挟んで発光素子３と受光素子４を配置し、発光素子３
からの光を受光素子４に通す透光窓たる孔５をプレート
２に形成してなる。[Prior Art] Conventionally, this type of recording paper presence/absence detecting device has a plate 2 on which a recording paper 1 is placed, as shown in FIGS. 3 and 7g4, for example.
The light emitting element 3 and the light receiving element 4 are arranged with the light emitting element 3 and the light receiving element 4 in between.
A hole 5 serving as a light-transmitting window is formed in the plate 2 to allow light from the light to pass through the light-receiving element 4.
上記プレート２の一端側は、該プレート２と基部６の間
に設けたばね７により上方に付勢され、これにより記録
紙１は給紙ローラ８に押圧されている。そして、記録紙
１は、この給紙ローラ８により矢印Ａ方向に一枚ずつ順
に送り出されるようになっている。One end of the plate 2 is urged upward by a spring 7 provided between the plate 2 and the base 6, and the recording paper 1 is thereby pressed against the paper feed roller 8. The recording paper 1 is fed out one by one in the direction of arrow A by the paper feed roller 8.
以上の構成から、記録紙１がプレート２の上にある間は
、発光素子３から出た光は記録紙１により遮られ、発光
素子４に到達しない状態となっている。With the above configuration, while the recording paper 1 is on the plate 2, the light emitted from the light emitting element 3 is blocked by the recording paper 1 and does not reach the light emitting element 4.
一方、記録紙１が給紙ローラ８により給紙され、プレー
ト２の上に１枚もなくなった場合、発光素子３から出た
光はプレート２の孔５を通り受光素子４に到達する状態
となり、この受光素子４から、記録紙１がなくなったこ
とを知らせる用紙補給信号が出力されていた。On the other hand, when the recording paper 1 is fed by the paper feed roller 8 and no paper is left on the plate 2, the light emitted from the light emitting element 3 passes through the hole 5 of the plate 2 and reaches the light receiving element 4. The light receiving element 4 outputs a paper replenishment signal indicating that the recording paper 1 has run out.
［解決すべき問題点コ
上記のように従来においては、記録紙１自体にて発光素
子３から出力された光を遮るようにしていたため、光の
遮蔽性に優れない記録紙、例えば薄手のトレーシングペ
ーパー又は透明なＯＨＰ用シートを用いた場合、発光素
子３の光はかかる記録紙１を透過して受光素子４に到達
してしまい、この結果記録紙１があるにもかかわらず記
録紙１がなくなったことを知らせる信号が出力されるこ
とになり、光の遮蔽性に優れない記録紙を用いることか
できないという問題点があった。[Problems to be solved] As mentioned above, in the past, the recording paper 1 itself blocked the light output from the light emitting element 3, so recording paper that does not have excellent light shielding properties, such as thin paper When racing paper or a transparent OHP sheet is used, the light from the light emitting element 3 passes through the recording paper 1 and reaches the light receiving element 4. As a result, even though there is recording paper 1, the light from the recording paper 1 This results in the output of a signal indicating that the light has run out, resulting in the problem that the only option is to use recording paper that does not have excellent light shielding properties.
本発明は、上記従来の問題点に鑑みなされたものであり
、光の遮蔽性に優れない記録紙をも用いることができる
記録紙有無検出装置を提供することを目的とする。The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a recording paper presence/absence detection device that can use recording paper that does not have excellent light shielding properties.
［問題点の解決手段］
このため本発明では、記録紙載置用のプレートに設けた
透光窓を挟んで発光素子と受光素子を配置し、該受光素
子による受光の有無により上記プレート上の記録紙の有
無を検出する記録紙有無検出装置において、上記プレー
トにガイド孔を形成し、このガイド孔に、上記プレート
の記録紙載置面側へ突出付勢され且つ記録紙の載置によ
り没するピンを配し、上記記録紙載置面の裏面側に上記
透光寞開閉用の遮蔽板を設けると共に、上記ピンの出没
動作に連動して上記遮蔽板を駆動し、上記ピンの突出状
態で上記透光窓を開き上記ピンの没状態で上記透光窓を
閉じる連動手段を備えるという構成を採用し、これによ
って上記目的を達成しようとするものである。[Means for Solving Problems] Therefore, in the present invention, a light emitting element and a light receiving element are arranged with a light transmitting window provided on a plate for placing recording paper in between, and depending on whether or not light is received by the light receiving element, In a recording paper presence/absence detection device for detecting the presence or absence of recording paper, a guide hole is formed in the plate, and the guide hole is biased to protrude toward the recording paper mounting surface of the plate and is depressed when the recording paper is placed. A shielding plate for opening and closing the transparent view is provided on the back side of the recording paper mounting surface, and the shielding plate is driven in conjunction with the protruding and retracting movement of the pin, and the protruding state of the pin is The invention is intended to achieve the above object by providing an interlocking means that opens the light-transmitting window when the pin is in the depressed state and closes the light-transmitting window when the pin is in the retracted state.
［実施例］
以下、本発明の一実施例を第１図及び第２図に基づいて
説明する。なお、上記従来例と同様な構成は同符号を用
いるものとし、その説明は省略する。[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. Note that configurations similar to those of the above-mentioned conventional example will be designated by the same reference numerals, and their description will be omitted.
図中２はプレートを示し、このプレート２の下側には、
該プレート２に形成した透光窓たる孔５を開閉する開閉
機構１０を設けである。2 in the figure indicates a plate, and on the underside of this plate 2,
An opening/closing mechanism 10 is provided to open and close the hole 5, which is a transparent window formed in the plate 2.
開閉機構１０は、記録紙１の有無を検出するピン１１と
、このピン１１の動作に基づき孔５を開閉する遮蔽板１
２と、これらピン１１と遮蔽板１２を連結する連動手段
たるＬ字型形状のアーム１３とからなる。The opening/closing mechanism 10 includes a pin 11 that detects the presence or absence of the recording paper 1, and a shielding plate 1 that opens and closes the hole 5 based on the operation of the pin 11.
2, and an L-shaped arm 13 serving as interlocking means for connecting these pins 11 and the shielding plate 12.
ピン１１は、その下部を、アーム１３の一端側に形成し
た長孔１３ａに摺動可能に嵌込んであると共に、上部を
、プレート２に形成したガイド孔２ａに緩く嵌込んで配
しである。The pin 11 has its lower part slidably fitted into a long hole 13a formed at one end of the arm 13, and its upper part loosely fitted into a guide hole 2a formed in the plate 2. .
遮蔽板１２は、アーム１３のうち孔５側に屈曲した先端
に取付けられ、プレート２の裏面側に配してあり、孔５
を開閉するものである。The shielding plate 12 is attached to the tip of the arm 13 that is bent toward the hole 5 side, and is arranged on the back side of the plate 2.
It opens and closes.
アーム１３は、プレート２の裏面に設けた支持ｉ２ｂに
回動自在に取付けてあり、アーム１３自体と遮蔽板１２
の重みにより、反時計方向に回動するようになっている
。このため、ピン１１は、プレート２の記録紙載置面側
へ突出付勢されている。したがって、記録紙１がない状
態では、アーム１３が反時計方向に回動し、これに伴っ
て、ピン１１は押上げられてプレート２から突出した状
態となり、一方遮蔽板１２は孔５を開く状態となる。The arm 13 is rotatably attached to a support i2b provided on the back surface of the plate 2, and the arm 13 itself and the shielding plate 12
The weight causes it to rotate counterclockwise. Therefore, the pin 11 is biased to protrude toward the recording paper mounting surface of the plate 2. Therefore, when there is no recording paper 1, the arm 13 rotates counterclockwise, and the pin 11 is pushed up and protrudes from the plate 2, while the shielding plate 12 opens the hole 5. state.
また、アーム１３は、記録紙１が少なくとも１枚ある状
態において、該記録紙１の重みによりピン１１が押下げ
られて没するように、取付けである。したがって、記録
紙１がある状態では、ピン１１は押下げられて没し、こ
れに伴ってアーム１３が時計方向に回動し、遮蔽板１２
は孔５を閉じる状態となる。なお、本実施例では、アー
ム１３の一端に設けた重り１３ｂにより、アーム１３の
両端のバランスをとフでいる。Further, the arm 13 is attached so that when at least one sheet of recording paper 1 is present, the pin 11 is pressed down and sunk by the weight of the recording paper 1. Therefore, when the recording paper 1 is present, the pin 11 is pushed down and sunk, and the arm 13 rotates clockwise and the shielding plate 12
is in a state where the hole 5 is closed. In this embodiment, the balance between both ends of the arm 13 is maintained by a weight 13b provided at one end of the arm 13.
また、ピン１１は、下部を長孔１３ａに摺動可能に嵌込
んであることから、アーム１３が回動する際にこの長孔
１３ａ内を摺動し、円滑に押上げあるいは押下げられる
こととなる。Furthermore, since the lower part of the pin 11 is slidably fitted into the elongated hole 13a, when the arm 13 rotates, it slides within the elongated hole 13a and is smoothly pushed up or down. becomes.
即ち、アーム１３は、ピン１１の出没動作に連動して、
ピン１１の突出状態で孔５を開き、ピン１１の没状悪で
孔５を閉じる方向に遮蔽板１２を駆動している。したが
って、記録紙１がない状態では、ピン１１がプレート２
より突出して孔５が開かれ、発光素子３からの光は孔５
を介して受光素子４に到達する。一方記録紙１がある状
態では、ピン１１が没して孔５が閉じられ、発光素子３
からの光は遮蔽板１２により遮断される。このため、記
録紙１が透明であっても、該記録紙１がある状態では発
光素子３から出力される光は受光素子４に到達しないこ
ととなる。That is, the arm 13 moves in conjunction with the movement of the pin 11,
The hole 5 is opened when the pin 11 is in a protruding state, and the shielding plate 12 is driven in a direction in which the hole 5 is closed when the pin 11 is in a depressed state. Therefore, when there is no recording paper 1, the pin 11 is connected to the plate 2.
The hole 5 is opened to protrude more, and the light from the light emitting element 3 passes through the hole 5.
The light reaches the light receiving element 4 via. On the other hand, when the recording paper 1 is present, the pin 11 sinks, the hole 5 is closed, and the light emitting element 3
The light from the front is blocked by the shielding plate 12. Therefore, even if the recording paper 1 is transparent, the light output from the light emitting element 3 will not reach the light receiving element 4 when the recording paper 1 is present.
なお、発光素子３と受光素子４は、アーム１３がわずか
に回動しただけで、孔５を介して光を通すことができる
ようにするために、斜め方向に対向して配置しである。Note that the light-emitting element 3 and the light-receiving element 4 are arranged to face each other in an oblique direction so that light can pass through the hole 5 even if the arm 13 is slightly rotated.
［発明の効果コ
以上のように本発明は、記録紙の有無を検出するピンを
設け、更にこのピンと連動して記録紙がない状態で透光
窓を開き、記録紙がある状態で透光窓を閉じる遮蔽板を
設けたので、光の遮蔽性に優れない記録紙を用いた場合
であっても、記録紙がある状態では遮蔽板により透光窓
が閉じられ発光素子からの光は受光素子に到達しなくな
ることから、従来のように光の遮蔽性に優れた記録紙だ
けでなく光の遮蔽性に優れない記録紙をも用いることが
できる効果を奏する。[Effects of the Invention] As described above, the present invention is provided with a pin that detects the presence or absence of recording paper, and in conjunction with this pin, opens the light-transmitting window when there is no recording paper, and opens the light-transmitting window when the recording paper is present. Since a shielding plate is provided to close the window, even if recording paper that does not have excellent light shielding properties is used, the light-transmitting window will be closed by the shielding plate when the recording paper is present, and the light from the light emitting element will not be received. Since the light does not reach the elements, it is possible to use not only recording paper that has excellent light shielding properties as in the past, but also recording paper that does not have excellent light shielding properties.
第１図は記録紙がある状態を示す本実施例の要部縦断面
図、第２図は記録紙がない状態を示す本実施例の要部縦
断面図、第３図は記録紙がある状態を示す従来例の要部
縦断面図、第４図は記録紙がない状態を示す従来例の要
部縦断面図である。
１：記録紙 ２ニブレート
３：発光素子 ４：受光素子
５：孔 １１：ピンFig. 1 is a vertical sectional view of the main part of this embodiment showing a state in which there is recording paper, Fig. 2 is a longitudinal sectional view of the main part of this embodiment showing a state in which there is no printing paper, and Fig. 3 is a longitudinal sectional view of the main part of this embodiment showing a state in which there is recording paper. FIG. 4 is a vertical cross-sectional view of a main part of a conventional example showing a state in which there is no recording paper. 1: Recording paper 2 Nibrate 3: Light emitting element 4: Light receiving element 5: Hole 11: Pin
Claims (1)
子と受光素子を配置し、該受光素子による受光の有無に
より上記プレート上の記録紙の有無を検出する記録紙有
無検出装置において、上記プレートにガイド孔を形成し
、このガイド孔に、上記プレートの記録紙載置面側へ突
出付勢され且つ記録紙の載置により没するピンを配し、
上記記録紙載置面の裏面側に上記透光窓開閉用の遮蔽板
を設けると共に、 上記ピンの出没動作に連動して上記遮蔽板を駆動し、上
記ピンの突出状態で上記透光窓を開き上記ピンの没状態
で上記透光窓を閉じる連動手段を備えたことを特徴とす
る記録紙有無検出装置。[Claims] A light-emitting element and a light-receiving element are arranged across a light-transmitting window provided on a plate for placing recording paper, and the presence or absence of recording paper on the plate is detected by the presence or absence of light reception by the light-receiving element. In the recording paper presence/absence detecting device, a guide hole is formed in the plate, and a pin is disposed in the guide hole, which is biased to protrude toward the recording paper mounting surface of the plate and sinks when the recording paper is placed.
A shielding plate for opening and closing the transparent window is provided on the back side of the recording paper mounting surface, and the shielding plate is driven in conjunction with the protruding and retracting movement of the pin, and the transparent window is opened with the pin protruding. A recording paper presence/absence detecting device comprising interlocking means for closing the transparent window when the opening pin is in the recessed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21512486A JPS6371046A (en) | 1986-09-12 | 1986-09-12 | Device for detecting presence of recording sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21512486A JPS6371046A (en) | 1986-09-12 | 1986-09-12 | Device for detecting presence of recording sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6371046A true JPS6371046A (en) | 1988-03-31 |
Family
ID=16667127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21512486A Pending JPS6371046A (en) | 1986-09-12 | 1986-09-12 | Device for detecting presence of recording sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6371046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743522A (en) * | 1996-11-14 | 1998-04-28 | Xerox Corporation | Document or copy sheet tray sheet set sensor actuator |
-
1986
- 1986-09-12 JP JP21512486A patent/JPS6371046A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743522A (en) * | 1996-11-14 | 1998-04-28 | Xerox Corporation | Document or copy sheet tray sheet set sensor actuator |
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