JPH01192647A - Device for detecting double feeding of paper of paper feeding device - Google Patents
Device for detecting double feeding of paper of paper feeding deviceInfo
- Publication number
- JPH01192647A JPH01192647A JP1540388A JP1540388A JPH01192647A JP H01192647 A JPH01192647 A JP H01192647A JP 1540388 A JP1540388 A JP 1540388A JP 1540388 A JP1540388 A JP 1540388A JP H01192647 A JPH01192647 A JP H01192647A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- encoder
- paper
- pressure roller
- detecting
- 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 description 10
- 230000000694 effects Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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、プリンター等の用紙送り装置の用紙
重ね送り検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper overlapping feed detection device for a paper feeding device such as a copying machine or a printer.
此種の装置では、用紙の送り方向に一定距離りを隔てて
、一対のセンサを配置し、用紙サイズを限定して、一対
のセンサが正確にオンオフするか否かで紙ジヤムや用紙
の重ね送り（２枚送り）の発生を検出している。In this type of device, a pair of sensors are placed a certain distance apart in the paper feeding direction, the paper size is limited, and paper jams and paper stacking are detected depending on whether the pair of sensors turns on and off accurately. The occurrence of feed (two-sheet feed) is detected.
また、特開昭６２−２７０３５５号公報には、加圧ロー
ラにエンコーダを連結し、このエンコーダの出力パルス
が特定の周波数以下になったことを検出するパルス監視
手段を設けたシート送り異常検知装置が開示されている
。Furthermore, Japanese Patent Application Laid-open No. 62-270355 discloses a sheet feeding abnormality detection device that includes an encoder connected to a pressure roller and a pulse monitoring means for detecting when the output pulse of the encoder becomes below a specific frequency. is disclosed.
距離りを隔ててセンサを配置した構成の場合、用紙がほ
とんど２重になっている場合には、用紙の重ね送りを検
出することができない、 ゛また。特開昭６２−２７
０３５５号公報にはカット紙の２重送りの発生を検出す
る手段に関しては何んらの記載がなく、また、モータの
回転数を変化させた場合、異常を検出してしまう欠陥が
存した。In the case of a configuration in which sensors are placed at a distance, it is not possible to detect overlapping feeding of paper if the paper is almost doubled. Japanese Unexamined Patent Publication 1986-27
Publication No. 0355 does not contain any description of means for detecting the occurrence of double feeding of cut paper, and also has a defect in that an abnormality is detected when the rotational speed of the motor is changed.
本発明は上記問題点を解消することを目的とするもので
ある。The present invention aims to solve the above problems.
上記目的を達成するため１本発明はモータ１２に連結す
るフィードローラ２と、該フィードローラ２にばね力に
よって押圧された回転自在な加圧ローラ２０と、前記フ
ィードローラ２と加圧ローラ２０の回転運動を電気信号
に変換するエンコーダ１４．２２と、該エンコーダ１４
．２２の各出力のずれを検出するずれ検出回路とを設け
たものである。In order to achieve the above object, the present invention includes a feed roller 2 connected to a motor 12, a rotatable pressure roller 20 pressed against the feed roller 2 by a spring force, and a combination of the feed roller 2 and the pressure roller 20. an encoder 14.22 that converts rotational motion into an electrical signal;
．． 22, and a shift detection circuit for detecting the shift of each output.
上記した構成において、フィードローラ２と加圧ローラ
２０との間に２枚のカット紙が送り込まれると、加圧ロ
ーラ２０の押圧力によってカット紙間しにすべりが発生
し、加圧ローラ２０とフィードローラ２の回転数が一致
しなくなる。これにより、一方のエンコーダ１４の出力
に対して、他方のエンコーダ２２の出力の位相あるいは
レベルがずれることになり、このずれは、ずれ検出回路
によって検出される。In the above configuration, when two cut sheets are fed between the feed roller 2 and the pressure roller 20, slipping occurs between the cut sheets due to the pressing force of the pressure roller 20, and the pressure roller 20 The rotation speeds of the feed rollers 2 no longer match. As a result, the phase or level of the output of the other encoder 22 will shift with respect to the output of one encoder 14, and this shift will be detected by the shift detection circuit.
〔実施例〕
以下に本発明の構成を添付図面に示す実施例を参照して
詳細に説明する。[Embodiments] The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.
２はプリンターの機体に設けられたフィードローラであ
り、これの芯軸４，６は機体に固設された軸受８，１０
に回転自在に支承されている。前記芯軸６の一端はモー
タ１２の出力軸の一端に連結している。前記モータ１２
には、入力軸の回転運動をパルス信号に変換するパルス
エンコーダ１４が固定され、該パルスエンコーダ１４の
入力軸は前記モータ１２の出力軸の他端に連結している
。2 is a feed roller provided on the body of the printer, and its core shafts 4, 6 are supported by bearings 8, 10 fixed on the body.
It is rotatably supported. One end of the core shaft 6 is connected to one end of the output shaft of the motor 12. The motor 12
A pulse encoder 14 that converts the rotational motion of an input shaft into a pulse signal is fixed to the motor 12, and the input shaft of the pulse encoder 14 is connected to the other end of the output shaft of the motor 12.
１６．１８はプリンター機体に、前記軸受８．１０の上
方に位置して、昇降自在に装置された軸受であり、これ
らに加圧ローラ２０の芯軸が回転自在に支承され、前記
芯軸には、前記軸受１８に固定されたパルスエンコーダ
２２の入力軸が連結している。前記加圧ローラ２０は、
軸受８，１６間及び１０．１８間に装置されたばね２４
．２６の引張力によって前記フィードローラ２に圧接し
、この圧接力は、フィードローラ２と加圧ローラ２０間
に第２図に示すように２枚のカット紙２８゜２８が挿入
されたとき、カット紙２８．２８回しにすべりが発生し
、加圧ローラ２０の回転数がフィードローラ２の回転数
に比し低下するような、値に設定されている。前記エン
コーダ１４．２２のパルス出力端は、プリンターの制御
部の、パルス同期状態のずれを検出するためのずれ検出
回路３０に接続している。前記ずれ検出回路３０の出力
端はモータ駆動回路３２と警報器３４に接続している。Reference numeral 16.18 denotes a bearing which is located above the bearing 8.10 in the printer body and is movable up and down.The core shaft of the pressure roller 20 is rotatably supported by these bearings. is connected to the input shaft of a pulse encoder 22 fixed to the bearing 18. The pressure roller 20 is
Spring 24 installed between bearings 8, 16 and 10.18
．． 26 is pressed against the feed roller 2 by a tensile force of The value is set such that slipping occurs after 28.28 turns of the paper and the number of rotations of the pressure roller 20 is lower than the number of rotations of the feed roller 2. The pulse output end of the encoder 14.22 is connected to a deviation detection circuit 30 of the printer control unit for detecting deviations in pulse synchronization. The output end of the deviation detection circuit 30 is connected to a motor drive circuit 32 and an alarm 34.
次に本実施例の作用について説明する。Next, the operation of this embodiment will be explained.
まず、エンコーダ１４と２２の入力軸を連動回転させた
とき、それらの出力パルスの位相が互いに一致するよう
に、予じめ調整しておく、モータ１２を駆動して、フィ
ードローラ２と加圧ローラ２０との間のカット紙を所定
方向に送る場合、正常な送り状態であれば、エンコーダ
１４．２２の出力パルスは１位相が一致して互いに同期
する。フィードローラ２と加圧ローラ２０間に２枚のカ
ット紙２８．２８が送り込まれて、用紙重送現象が発生
すると、カット紙２８．２８同しがすべって加圧ローラ
２０の回転数が低下し、エンコーダ１４と２２の出力パ
ルスの同期状態にずれが発生する。このずれは、ずれ検
出回路３ｏによって検出され、該検出回路３ｏは１１１
Ｉｔの検出信号を出力する。この信号によってモータ
駆動回路３２はモータ１２の回転を中止するとともに、
警報器３４が、警告音を発生する。尚１本実施例では、
エンコーダ１４．２２としてパルスエンコーダを採用し
たが、入力軸の回転運動を正弦波、直流電圧などの電気
信号に変換するエンコーダを用いることができ、又、ず
れ検出回路３０も、位相のずれ以外に一対のエンコーダ
の出力レベルのずれを検出するずれ検出回路を用いるこ
とができる。First, the motor 12 is adjusted in advance so that when the input shafts of the encoders 14 and 22 are rotated in conjunction, the phases of their output pulses match each other.The motor 12 is driven to apply pressure to the feed roller 2. When feeding a cut sheet between rollers 20 in a predetermined direction, the output pulses of the encoders 14 and 22 have one phase and are synchronized with each other under normal feeding conditions. When two sheets of cut paper 28, 28 are fed between the feed roller 2 and the pressure roller 20 and a paper double feeding phenomenon occurs, the cut sheets 28, 28 slip and the rotation speed of the pressure roller 20 decreases. However, a shift occurs in the synchronization state of the output pulses of the encoders 14 and 22. This deviation is detected by the deviation detection circuit 3o, which detects the deviation at 111.
It outputs a detection signal of It. This signal causes the motor drive circuit 32 to stop the rotation of the motor 12, and
An alarm device 34 generates a warning sound. In this embodiment,
Although a pulse encoder is used as the encoder 14, 22, an encoder that converts the rotational motion of the input shaft into an electrical signal such as a sine wave or a DC voltage can also be used. A shift detection circuit that detects a shift in the output levels of a pair of encoders can be used.
本発明は上述の如く構成したので確実にカット紙の２枚
送りを検出することができるとともに、加圧ローラをば
ね力によってフィードローラに押圧しているので、カッ
ト紙の２枚送りや紙ジヤムの発生を防止することができ
る効果が存する。Since the present invention is configured as described above, it is possible to reliably detect the feeding of two sheets of cut paper, and since the pressure roller is pressed against the feed roller by the spring force, it is possible to detect the feeding of two sheets of cut paper or the paper jam. There is an effect that can prevent the occurrence of.
第１図は外観図、第２図は側面図、第３図はブロック回
路図である。
２・・・・フィードローラ、 ４，６・・・・芯軸、
８゜１０・・・・軸受、 １２・・・・モータ、
１４・・・・エンコーダ、 １６．１８・・・・軸受
、 ２０・・・・加圧ローラ、 ２２・・・・エンコ
ーダ、 ２４．２６・・・・ばね、 ２８・・・・
カット紙特許出願人 武藤工業株式会社
代理人弁理士 西 島 綾 雄第３図
一一ノ
一′へＮ
曽
＼のFIG. 1 is an external view, FIG. 2 is a side view, and FIG. 3 is a block circuit diagram. 2...Feed roller, 4,6...Core shaft,
8゜10... Bearing, 12... Motor,
14...Encoder, 16.18...Bearing, 20...Pressure roller, 22...Encoder, 24.26...Spring, 28...
Cut Paper Patent Applicant Muto Kogyo Co., Ltd. Representative Patent Attorney Aya Nishijima To Figure 3 11-1'
Claims (1)
ィードローラ２にばね力によって押圧された回転自在な
加圧ローラ２０と、前記フィードローラ２と加圧ローラ
２０の回転運動を電気信号に変換するエンコーダ１４、
２２と、該エンコーダ１４、２２の各出力のずれを検出
するずれ検出回路とから成る用紙送り装置の用紙重ね送
り検出装置。(1) A feed roller 2 connected to a motor 12, a rotatable pressure roller 20 pressed by a spring force to the feed roller 2, and converting the rotational motion of the feed roller 2 and pressure roller 20 into an electrical signal. encoder 14,
22, and a deviation detection circuit for detecting deviations between the respective outputs of the encoders 14 and 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1540388A JPH01192647A (en) | 1988-01-26 | 1988-01-26 | Device for detecting double feeding of paper of paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1540388A JPH01192647A (en) | 1988-01-26 | 1988-01-26 | Device for detecting double feeding of paper of paper feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01192647A true JPH01192647A (en) | 1989-08-02 |
Family
ID=11887764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1540388A Pending JPH01192647A (en) | 1988-01-26 | 1988-01-26 | Device for detecting double feeding of paper of paper feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01192647A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7052008B2 (en) * | 2003-05-14 | 2006-05-30 | Kabushiki Kaisha Toshiba | Overlapped-sheet detection apparatus |
| US7517077B2 (en) * | 2003-09-02 | 2009-04-14 | Seiko Epson Corporation | Medium transporting device and recording apparatus incorporating with the same |
| JP2009132044A (en) * | 2007-11-30 | 2009-06-18 | Brother Ind Ltd | Sheet end detecting apparatus, image recorder equipped with the same, and method for detecting position of sheet being conveyed |
| CN104140008A (en) * | 2014-07-30 | 2014-11-12 | 龙岩烟草工业有限责任公司 | Opposite-pressing roller synchronization detecting device, system and method |
| US8962359B2 (en) | 2011-07-19 | 2015-02-24 | Crystal Is, Inc. | Photon extraction from nitride ultraviolet light-emitting devices |
| US9028612B2 (en) | 2010-06-30 | 2015-05-12 | Crystal Is, Inc. | Growth of large aluminum nitride single crystals with thermal-gradient control |
| US9034103B2 (en) | 2006-03-30 | 2015-05-19 | Crystal Is, Inc. | Aluminum nitride bulk crystals having high transparency to ultraviolet light and methods of forming them |
| US10446391B2 (en) | 2007-01-26 | 2019-10-15 | Crystal Is, Inc. | Thick pseudomorphic nitride epitaxial layers |
-
1988
- 1988-01-26 JP JP1540388A patent/JPH01192647A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1749771A1 (en) * | 2003-05-14 | 2007-02-07 | Kabushiki Kaisha Toshiba | Ovelapped-sheet detection apparatus |
| EP1749772A1 (en) * | 2003-05-14 | 2007-02-07 | Kabushiki Kaisha Toshiba | Overlapped-sheet detection apparatus |
| US7267339B2 (en) | 2003-05-14 | 2007-09-11 | Kabushiki Kaisha Toshiba | Overlapped-sheet detection apparatus |
| US7419156B2 (en) | 2003-05-14 | 2008-09-02 | Kabushiki Kaisha Toshiba | Overlapped-sheet detection apparatus |
| US7052008B2 (en) * | 2003-05-14 | 2006-05-30 | Kabushiki Kaisha Toshiba | Overlapped-sheet detection apparatus |
| US7517077B2 (en) * | 2003-09-02 | 2009-04-14 | Seiko Epson Corporation | Medium transporting device and recording apparatus incorporating with the same |
| US9034103B2 (en) | 2006-03-30 | 2015-05-19 | Crystal Is, Inc. | Aluminum nitride bulk crystals having high transparency to ultraviolet light and methods of forming them |
| US10446391B2 (en) | 2007-01-26 | 2019-10-15 | Crystal Is, Inc. | Thick pseudomorphic nitride epitaxial layers |
| JP2009132044A (en) * | 2007-11-30 | 2009-06-18 | Brother Ind Ltd | Sheet end detecting apparatus, image recorder equipped with the same, and method for detecting position of sheet being conveyed |
| US9028612B2 (en) | 2010-06-30 | 2015-05-12 | Crystal Is, Inc. | Growth of large aluminum nitride single crystals with thermal-gradient control |
| US8962359B2 (en) | 2011-07-19 | 2015-02-24 | Crystal Is, Inc. | Photon extraction from nitride ultraviolet light-emitting devices |
| US10074784B2 (en) | 2011-07-19 | 2018-09-11 | Crystal Is, Inc. | Photon extraction from nitride ultraviolet light-emitting devices |
| CN104140008A (en) * | 2014-07-30 | 2014-11-12 | 龙岩烟草工业有限责任公司 | Opposite-pressing roller synchronization detecting device, system and method |
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