JPS6095524A - Scanner of copying machine - Google Patents

Scanner of copying machine

Info

Publication number
JPS6095524A
JPS6095524A JP20271383A JP20271383A JPS6095524A JP S6095524 A JPS6095524 A JP S6095524A JP 20271383 A JP20271383 A JP 20271383A JP 20271383 A JP20271383 A JP 20271383A JP S6095524 A JPS6095524 A JP S6095524A
Authority
JP
Japan
Prior art keywords
scanning
motor
sensor
speed
actuator
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
Application number
JP20271383A
Other languages
Japanese (ja)
Inventor
Kiyoshi Matsuzawa
松沢　喜好
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP20271383A priority Critical patent/JPS6095524A/en
Publication of JPS6095524A publication Critical patent/JPS6095524A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To secure the preliminary run distance necessary for the start of a scanning system through one sensor by starting image formation after the scanning system attains to a scanning speed when a copying machine which drives the scanning system by an independent motor is controlled at the start of scanning. CONSTITUTION:A scanning motor 5 is a reversible motor, which rotates normally (in scanning direction) when a scanning-direction signal 13 is at HIGH or reverses when at LOW. A CPU8 outputs the scanning-direction signal LOW from an input/output control part 12 at the start of scanning to indicates the reversing of the motor, and the scanning motor 5 drives a lamp 1 at a life-size scanning speed in the opposite direction of scanning. The CPU8 when detecting a scanning sensor signal 15 changing from HIGH to LOW during the opposite-directional driving rotates the scanning motor in the scanning direction at a speed for specific magnification, and starts moving the lamp in the scanning direction. The front end of an original is image-formed on a photosensitive body when the rear end of an actuator goes beyond the scanning sensor.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は独立モータにより走査系を駆動する複写機の走
査開始時の制御に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to control at the start of scanning in a copying machine whose scanning system is driven by an independent motor.

〔従来技術〕[Prior art]

従来の複写機の走査系の駆動は、感光ドラム等を駆動す
るメインモータの動力を利ｊ１１シて行っていた。この
方法でメインモータの駆動トルクが太きいため、走査系
の立」ニリに要する時間が極めて短かい利点があった。The scanning system of a conventional copying machine is driven using the power of a main motor that drives a photosensitive drum and the like. This method had the advantage that the time required for the scanning system to stand up was extremely short because the driving torque of the main motor was large.

ところが、多段階の縮少、拡大の機能が導入されると、
走査系の速度を自由に制御するためにＤＣサーボモータ
等により走査系を独立駆動する様になった。However, when the multi-stage reduction and expansion function was introduced,
In order to freely control the speed of the scanning system, the scanning system has come to be independently driven by a DC servo motor or the like.

しかしながら、独立モータの場合には走査系の駆動能力
だけのトルクを持つ小型、＋＋＋′ｆ、ｔｉｉのものが
使われるため、メインモータからの駆動に比べて立上り
に時間を要する欠点がある。特に縮少重大の場合に走査
速度がそれ（一つれて大きくなるため、速い速度に立上
げるためには走査系の立上り時間も長くなっていた。However, in the case of an independent motor, a small, +++'f, tii motor with a torque equal to the driving capacity of the scanning system is used, so it has the disadvantage that it takes longer to start up than when driven by a main motor. In particular, when the reduction is serious, the scanning speed increases, so in order to start up at a faster speed, the start-up time of the scanning system becomes longer.

そのため、走査系の立」ニリに必要な助走距離を２個の
センサーで確保する方法を採用していた。Therefore, a method was adopted in which two sensors were used to ensure the necessary run-up distance for the scanning system.

第２図はその方法を示すもので、アクチュエーターＱ］
）の実線位置は、走査開始前の位置を示し、センサー（
イ）を踏んでいる。アクチュエーター＆１）の破線位置
は原稿先端の結像開始位置を示し、これはアクチュエー
ター〇◇の先端がセンサー（ハ）に到達した時に一致す
る。矢印方向に走査が開始されると像はアクチュエータ
ー０ηがセンサー（ハ）に来たところから結像を開始す
るため、走査系の立上り助走のための距離ｄが確保され
る。ところが、この場合、結像開始点を決めるためのセ
ンサー（ハ）の他にセンサー（イ）が必要となるため、
コストアップおよびセンサー故障の確率が増し、又製造
工程での２つのセンサーの位置出しに時間がかかるとい
う欠点があった。Figure 2 shows the method, using actuator Q]
) indicates the position before scanning starts, and the solid line position of the sensor (
A). The dashed line position of actuator &1) indicates the imaging start position of the leading edge of the document, which coincides when the leading edge of actuator 〇◇ reaches the sensor (c). When scanning starts in the direction of the arrow, the image starts forming from the point where the actuator 0η reaches the sensor (c), so that a distance d is secured for the start-up and run-up of the scanning system. However, in this case, a sensor (A) is required in addition to the sensor (C) to determine the starting point of imaging, so
This method has disadvantages in that it increases costs, increases the probability of sensor failure, and takes time to position the two sensors during the manufacturing process.

〔発明の目的〕[Purpose of the invention]

本発明は２個のセンサーにより走査系の立上りに必要な
助走距離を確保していた方式を、１個のセンサーにより
走査系の立上りに必要な助走距離を確保するようにした
複写機の走査装置を提供することを目的とする。The present invention provides a scanning device for a copying machine in which a system in which two sensors are used to secure the run-up distance necessary for the start-up of the scanning system is replaced with a system in which the run-up distance necessary for the start-up of the scan system is secured using one sensor. The purpose is to provide

〔発明の構成〕[Structure of the invention]

本発明は当初走査系を走査方向と反対方向に駆動しアク
チュエーターがセンサーを踏み外した時点を検出してア
クチュエータを走査方向に駆動させ、センサーを踏み外
した位置が原稿の先ｍ１，１結像位置と一致させるよう
にしたものであ私１〔実施例〕 第１図は複写機全体の概略を示す側面図であり、走査系
はランプ（１）およびランプの半分の速度で移動するミ
ラー（２）で構成され、走査モータ（図示せず）により
駆動されるアクチュエーター（図示せず）は、う、ンプ
（１）に固定されてランプ（１）の移動にともない移動
する。走査センサー（３）はアクチュエーターの移動に
より、オン・オフが行なわれる。。The present invention initially drives the scanning system in the opposite direction to the scanning direction, detects the point in time when the actuator depresses the sensor, drives the actuator in the scanning direction, and sets the position where the sensor is depressed as the imaging position m1,1 ahead of the document. 1 [Example] Figure 1 is a side view schematically showing the entire copying machine, and the scanning system consists of a lamp (1) and a mirror (2) that moves at half the speed of the lamp. An actuator (not shown) driven by a scanning motor (not shown) is fixed to the lamp (1) and moves as the lamp (1) moves. The scanning sensor (3) is turned on and off by moving the actuator. .

第８図は、第１図の走査センサー７１（の走査センサー
（３）と、アクチュエーター（４）の位置関係を示し、
アクチュエーター（４）はミラー（２）に敗り付けられ
ており、ミラーと共に移動する。FIG. 8 shows the positional relationship between the scanning sensor (3) of the scanning sensor 71 (of FIG. 1) and the actuator (4),
The actuator (4) is defeated by the mirror (2) and moves together with the mirror.

第４図はマイクロコンピュータで構成した制御ｌ１部で
ある。走査モータ（５）は、カウンタ（６）が作るクロ
ック信号（７）に同期した速度（′″−より回転する３
、ｃＰ　Ｕ　（８）は縮倍率に応じた分局値データをＲ
ＯＭ＋９１から読み取り、カウンタ（６）に入力する。FIG. 4 shows a control section 11 composed of a microcomputer. The scanning motor (5) rotates at a speed ('''-) synchronized with a clock signal (7) generated by a counter (6).
, cP U (8) is R
Read from OM+91 and input to counter (6).

カウンタ（６）は基準クロック（１０）をＣＰＵ（８＋
からＪｉえられた分周値データを使い分周して、クロッ
ク信号（７）を発生する。縮倍率データはＲＡＭｔｌｌ
）に記憶されＣＰＵ（８）で処理され走査モーター速度
を制御し、入出力制御部（１２１からモータ駆動信号を
出力する。走査モーター（５）は可逆転モータで走査方
向信号（１３）がＨＩＧＨの時、正転（走査方向）ＬＯ
Ｗの時、逆転を行う。The counter (6) uses the reference clock (10) as the CPU (8+).
The clock signal (7) is generated by dividing the frequency using the frequency division value data obtained from Ji. The reduction ratio data is in RAMtll
) and processed by the CPU (8) to control the scanning motor speed, and output a motor drive signal from the input/output control section (121).The scanning motor (5) is a reversible motor and the scanning direction signal (13) is HIGH. When , forward rotation (scanning direction) LO
When W, perform a reversal.

以下、走査開始時の制御動作を第３図、第４図及び第５
図に基き説明する。The control operations at the start of scanning are shown in Figures 3, 4, and 5 below.
This will be explained based on the diagram.

第８図の（Ａ）は走査開始前の状態を示す。アクチュエ
ーター（４）は走査センサー（３）を遮っており、走査
センサー（３）はオンの状態である。複写動作を開始し
、走査を開始する時点でＣＰ　Ｕ　（８）は入出力制御
部（１２）からＬＯＷの走査方向信号を出力してモータ
ー逆転を指示し、かつモータ駆動信号（１４）をオンに
して走査モータ（５）を駆動する。同時にＣＰ　Ｕ　（
８）は等倍の速度のクロック信号（７）が出力する様に
カウンタ（６）を設定する。以」二の制御（二より走査
モータ（５）は等倍の走査速度で走査と逆方向にランプ
（１）を駆動する。第８図の（Ｂ）はランプ（１）が逆
方向に駆動されて、アクチュエーター（４）が走査セン
サー（３）を踏み外した状態を示す。ＣＰ　Ｕ　ｆ８１
は走査モータ（５）を逆方向に駆動中（＝走査センサー
信号（１５）がＴＴＴＣＪＩからＬＯＷに変化する時点
をとらえて以下の処理を行う。すなわち、ランプを走査
方向に駆動して実際の走査を行うため（＝、走査方向信
号（ｔ３）を正方向にし、クロック信号を選択された倍
率の走査速度を与える周波数に合わせて出力する。縮小
の場合は高速となり、拡大の場合は低速となる。この結
果、走査モータは走査方向へ所定の倍率の速度で回転を
行い、ランプが走査方向へ移動を開始する。FIG. 8(A) shows the state before the start of scanning. The actuator (4) is blocking the scanning sensor (3) and the scanning sensor (3) is on. At the point when the copying operation is started and scanning is started, the CPU (8) outputs a LOW scanning direction signal from the input/output control section (12) to instruct motor reverse rotation, and turns on the motor drive signal (14). drive the scanning motor (5). At the same time, CPU (
8) sets the counter (6) so that the clock signal (7) at the same speed is output. The second control (2) The scanning motor (5) drives the lamp (1) in the opposite direction to the scanning at the same scanning speed. (B) in Figure 8 shows that the lamp (1) is driven in the opposite direction. CPU f81 indicates that the actuator (4) has missed the scanning sensor (3).
While driving the scanning motor (5) in the reverse direction (= the point in time when the scanning sensor signal (15) changes from TTTCJI to LOW, the following processing is performed. In other words, the lamp is driven in the scanning direction and the actual scanning is started. In order to perform (=, the scanning direction signal (t3) is set in the positive direction, and the clock signal is output in accordance with the frequency that gives the scanning speed of the selected magnification. In the case of reduction, the speed is high, and in the case of enlargement, the speed is low. As a result, the scanning motor rotates in the scanning direction at a speed of a predetermined magnification, and the lamp starts moving in the scanning direction.

第８図の（Ｃ）は（Ｔ３）の後（二ランプを走査方向に
駆動［７、アクチュエーターの後端が走査センサーを外
れた時点を示す。アクチュエーターの幅は、走査速度が
最大のとき、すなわち晶小の縮小率の場合に、ランプ速
度が走査速度に達するために必要な助走距離ｄと等しい
か、又はそれ以上に設定する。(C) in Figure 8 shows the point in time after (T3) when the two lamps are driven in the scanning direction [7, and the rear end of the actuator leaves the scanning sensor.The width of the actuator is as follows: In other words, in the case of a reduction ratio of a small crystal, the ramp speed is set to be equal to or greater than the run-up distance d required to reach the scanning speed.

従って、光学系はアクチュエーターの後端が、走査セン
サーを踏み外した位置で原稿の先端が感光体上に結像さ
れる。Therefore, in the optical system, the leading edge of the document is imaged on the photoreceptor at the position where the rear end of the actuator misses the scanning sensor.

〔発明の効果〕〔Effect of the invention〕

以上説明した様に本発明によれば、走査系が走査速度に
立ち上がった後に、結像が開始、されるため、センサー
１個で先端画像の乱れの無いコピーを提供することがで
きると共に安価で、かつ製造工程でのセンサー位置出し
調整を不用とする効果がある。As explained above, according to the present invention, image formation is started after the scanning system reaches the scanning speed, so it is possible to provide a copy without disturbance of the leading edge image with a single sensor and at low cost. , and has the effect of eliminating the need for sensor positioning adjustment during the manufacturing process.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明を適用する複写機の概略を示す側面図、
第２図は従来の走査装置の動作量、四国、第８図は本発
明の走査装置の動作説明図、第４・図は本発明の走査装
置の制御回路図、第５図は本発明の動作を示すタイミン
グチャートである。 符号説明 （１）・・・・・・ランプ　（２）・・・・・・ミラー
（３）・・・・・・走査センサー　（４）・・・・・・
アクチュエーター（５）・・・・・・走査モータFIG. 1 is a side view schematically showing a copying machine to which the present invention is applied;
FIG. 2 shows the amount of operation of the conventional scanning device in Shikoku, FIG. 8 is an explanatory diagram of the operation of the scanning device of the present invention, FIG. 4 is a control circuit diagram of the scanning device of the present invention, and FIG. It is a timing chart showing the operation. Description of symbols (1)...Lamp (2)...Mirror (3)...Scanning sensor (4)...
Actuator (5)...Scanning motor

Claims (1)

【特許請求の範囲】 複写機の走査系に連動したアクチュエーターによりオン
・オフする１個のセンサーを有し、はじめに走査系を走
査方向と反対方向に駆動し、前記アクチュエーターが前
記センサーを踏み外した時　。 点を検出して走査系を選択された倍率の走査速度となす
様に走査方向に駆動させる制御部を有し、前記アクチュ
エーターが走査方向に進行して、センサーを踏み外した
位置が原稿の先端の結像位置と一致するようにしたこと
を特徴とする複写機の走査装置。[Scope of Claims] It has one sensor that is turned on and off by an actuator linked to a scanning system of a copying machine, the scanning system is first driven in the opposite direction to the scanning direction, and when the actuator misses the sensor; . It has a control unit that detects the point and drives the scanning system in the scanning direction so as to achieve the scanning speed of the selected magnification, and the actuator moves in the scanning direction so that the position where the sensor is not stepped on is the leading edge of the document. A scanning device for a copying machine, characterized in that the scanning device is arranged to coincide with an image forming position.
JP20271383A 1983-10-31 1983-10-31 Scanner of copying machine Pending JPS6095524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20271383A JPS6095524A (en) 1983-10-31 1983-10-31 Scanner of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20271383A JPS6095524A (en) 1983-10-31 1983-10-31 Scanner of copying machine

Publications (1)

Publication Number Publication Date
JPS6095524A true JPS6095524A (en) 1985-05-28

Family

ID=16461918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20271383A Pending JPS6095524A (en) 1983-10-31 1983-10-31 Scanner of copying machine

Country Status (1)

Country Link
JP (1) JPS6095524A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5695272A (en) * 1980-10-30 1981-08-01 Canon Inc Variable magnification copying apparatus
JPS587153B2 (en) * 1975-12-29 1983-02-08 ダイキン工業株式会社 Reitouraizouko

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587153B2 (en) * 1975-12-29 1983-02-08 ダイキン工業株式会社 Reitouraizouko
JPS5695272A (en) * 1980-10-30 1981-08-01 Canon Inc Variable magnification copying apparatus

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