JPH0462570B2 - - Google Patents
Info
- Publication number
- JPH0462570B2 JPH0462570B2 JP12106385A JP12106385A JPH0462570B2 JP H0462570 B2 JPH0462570 B2 JP H0462570B2 JP 12106385 A JP12106385 A JP 12106385A JP 12106385 A JP12106385 A JP 12106385A JP H0462570 B2 JPH0462570 B2 JP H0462570B2
- Authority
- JP
- Japan
- Prior art keywords
- magnification
- gear
- switching
- image forming
- drive source
- 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
Links
- 238000003384 imaging method Methods 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 108091008695 photoreceptors Proteins 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はズーム機能を有する複写機に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine having a zoom function.
一般にズーム複写機は原稿台ガラス上の原稿を
光源で照射し、その反射光を第１〜第３ミラーを
経て結像手段に導き、該結像手段を構成するレン
ズ及び第４ミラーの相対位置により定まる倍率の
光像を感光体面に結像させるようになつている。
この結像手段の倍率に応じた相対位置への移動は
通常等倍時を基準として駆動源から発生するエン
コーダーパルス数により設定されるが、その動力
伝達系にはギアトレインが用いられるため、その
バツクラツシユにより設定倍率と実際の倍率とに
誤差を生じさせることがあり、しかも、この誤差
は倍率設定の回数が増えると拡大する虞れがあつ
た。
In general, a zoom copying machine illuminates an original on an original table glass with a light source, guides the reflected light to an imaging means through first to third mirrors, and positions the relative position of the lens and fourth mirror that constitute the imaging means. An optical image with a magnification determined by the above is formed on the surface of the photoreceptor.
The movement of this image forming means to a relative position according to the magnification is normally set by the number of encoder pulses generated from the drive source with reference to the same magnification, but since a gear train is used for the power transmission system, Batch crashing may cause an error between the set magnification and the actual magnification, and this error may increase as the number of times the magnification is set increases.
また、一般にズーム複写機は結像手段の移動
と、原稿走査（原稿台又は光源等の光学系の移
動）とを別個の駆動源を用いて独立に行つている
が、最近、装置の小型化及び低コスト化等のため
に単一駆動源により両駆動を行えるようにしたズ
ーム複写機が提案されている。この場合には駆動
源に連繋する原稿走査系の途中に倍率設定系へ適
時切換えできる切換え手段を介装する必要があ
り、しかも、この切換え手段は通常倍率設定ギア
と切換えギアの断続で行われることから、切換え
時にギアの歯先同士のぶつかり合いが生じ、その
際に倍率設定ギアが時計方向或いは反時計方向へ
一歯ずれることがある。この歯のずれは倍率設定
回数により累積されるという問題があつた。 In addition, zoom copying machines generally move the image forming means and scan the document (move the document table or optical system such as the light source) independently using separate drive sources, but recently the devices have become smaller. In order to reduce costs, zoom copying machines have been proposed that are capable of performing both drives using a single drive source. In this case, it is necessary to install a switching means that can switch to the magnification setting system in a timely manner in the middle of the document scanning system connected to the drive source, and this switching means is usually performed by intermittent switching between the magnification setting gear and the switching gear. Therefore, the tips of the gear teeth collide with each other during switching, and the magnification setting gear may shift by one tooth in the clockwise or counterclockwise direction. There was a problem in that this tooth shift was accumulated depending on the number of times the magnification was set.
この発明は上記の点に鑑み、ギアトレインのバ
ツクラツシユ或いは結像手段の移動と、原稿走査
とを単一駆動源から切換えて行うときに生ずる誤
差が累積されないようにしたズーム複写機を提供
することを目的としている。
In view of the above points, it is an object of the present invention to provide a zoom copying machine that prevents the accumulation of errors that occur when a single drive source is used to switch between the backlash of a gear train, the movement of an imaging means, and the scanning of an original. It is an object.
上記の目的を達成するため、この発明は結像手
段の移動と、原稿走査との駆動源が切換え手段を
介して共用されているズーム複写機において、前
記切換え手段の切換え回数に応じて結像手段を基
準位置に戻す制御手段を備え、設定倍率と実際の
倍率との誤差を適時修正できるように構成したも
のである。
In order to achieve the above object, the present invention provides a zoom copying machine in which a drive source for moving an image forming means and for scanning an original is shared through a switching means, in which an image is formed in accordance with the number of times the switching means is switched. The apparatus is equipped with a control means for returning the means to the reference position, and is configured to be able to correct the error between the set magnification and the actual magnification at any time.
次に、この発明を第１図乃至第３図に示す一実
施例にもとづいて説明する。
Next, the present invention will be explained based on an embodiment shown in FIGS. 1 to 3.
第１図はズーム複写機の光学系を示し、図にお
いて、１０は原稿台ガラス、１１は複写用原稿、
１２は原稿１１を照射する光源である。光源１２
により照射し、原稿１１から反射した光は第１ミ
ラー１３、第２ミラー１４、第３ミラー１５を通
して結像手段１６に導かれ、該結像手段１６を構
成するレンズ１７及び第４ミラー１８の相対位置
により定まる倍率の光像を感光体１９面に結像さ
せるようになつている。この結像手段１６のレン
ズ１７及び第４ミラー１８の相対移動は例えば、
ｆ＝200mmレンズ使用の場合、等倍時には第３ミ
ラー１５からレンズ１７までの距離ａと、レンズ
１７から第４ミラー１８までの距離ｂは共に400
mmとなり、l1＝ａ＋ｂ＝800mmであるが、0.5倍に
するときはａ＝600mm、ｂ＝400mmとなり、l0.5＝
ａ＋ｂ＝900mmである。従つて、等倍時の結像手
段１６の位置Ｐ，P′を基準とすると、0.5倍時に
はレンズ１７を600−400＝200mm図において右方
向へ移動させるとともに、第４ミラー１８を
（900−800）／２＝50mm図において右方向へ移動
させればよい。また、他の倍率設定時も前記基準
位置をCPUに記憶させておくことにより、駆動
源から発生するエンタコーダーパルス数として設
定できる。２０は前記結像手段１６の基準位置
Ｐ，P′に設けた位置検出センサーである。 FIG. 1 shows the optical system of a zoom copying machine, and in the figure, 10 is an original table glass, 11 is an original for copying,
12 is a light source that illuminates the original 11; light source 12
The light reflected from the original 11 is guided to the image forming means 16 through the first mirror 13, the second mirror 14, and the third mirror 15. A light image with a magnification determined by the relative position is formed on the surface of the photoreceptor 19. The relative movement of the lens 17 and the fourth mirror 18 of the imaging means 16 is, for example,
When using an f=200mm lens, the distance a from the third mirror 15 to the lens 17 and the distance b from the lens 17 to the fourth mirror 18 are both 400 at the same magnification.
mm, and l1=a+b=800mm, but when multiplying by 0.5, a=600mm, b=400mm, and l0.5=
a+b=900mm. Therefore, based on the positions P and P' of the image forming means 16 at the same magnification, when the magnification is 0.5, the lens 17 is moved to the right in the figure of 600-400=200 mm, and the fourth mirror 18 is moved to (900- 800)/2=50mm Just move it to the right in the diagram. Also, when setting other magnifications, by storing the reference position in the CPU, it can be set as the number of encoder pulses generated from the drive source. Reference numeral 20 designates position detection sensors provided at reference positions P and P' of the image forming means 16.
第２図は前記原稿台ガラス１０又は光源１２等
の光学系を移動させる原稿走査系の途中に倍率設
定系への切換え手段を介装した例を示している。
本図において、２１は駆動源、２２はその出力軸
２１′に固定した駆動ギア、２３は駆動ギア２２
に噛合し、該出力軸２１′を支点として揺動する
レバー２４に軸支された切換えギアである。切換
えギア２３は通常はバネ２５の作用で原稿走査系
のギア２６に噛合しているが、ソレノイド２７に
通電されると、倍率設定系のギア２８に噛合する
ようになつている。２９はソレノイド２７により
レバー２４が倍率設定系のギア２８側へ揺動した
ことを検出するセンサー、３０は該センサー２９
からの出力をカウントするカウンター、３１は該
カウンター３０の出力と、予め切換え回数を設定
する設定器３２の出力とを比較し、これらの出力
が一致したときに駆動源２１へ前記結像手段１６
を基準位置に戻すための作動信号を出力する制御
手段である。そして該結像手段１６が基準位置に
戻つたことがセンサー２０により検出され、その
検出信号を前記CPUが受領すると、駆動源２１
を停止させるとともに、これより若干遅らせて駆
動源２１を再スタートするようになつている。 FIG. 2 shows an example in which switching means for switching to a magnification setting system is interposed in the middle of an original scanning system for moving optical systems such as the original table glass 10 or the light source 12.
In this figure, 21 is a drive source, 22 is a drive gear fixed to the output shaft 21', and 23 is a drive gear 22.
This is a switching gear that is pivotally supported by a lever 24 that meshes with the output shaft 21' and swings about the output shaft 21' as a fulcrum. The switching gear 23 normally meshes with a gear 26 of the document scanning system under the action of a spring 25, but when the solenoid 27 is energized, it meshes with a gear 28 of the magnification setting system. 29 is a sensor that detects when the lever 24 is swung toward the gear 28 of the magnification setting system by the solenoid 27; 30 is the sensor 29;
A counter 31 that counts the output from the counter 30 compares the output of the counter 30 with the output of the setting device 32 that sets the number of times of switching in advance, and when these outputs match, the driving source 21 outputs the image forming means 16.
This is a control means that outputs an actuation signal to return the motor to its reference position. When the sensor 20 detects that the imaging means 16 has returned to the reference position and the CPU receives the detection signal, the drive source 21
At the same time, the drive source 21 is restarted a little later than this.
なお、前記結像手段１６が基準位置に戻る途中
でメイン電源がオフにされたときのためにバツク
アツプ電源が必要となるが、電源を再度オンした
時に必ず結像手段が基準位置に戻るようにしてお
けば問題はない。 Note that a backup power source is required in case the main power is turned off while the image forming means 16 is returning to the reference position, but it is necessary to ensure that the image forming means returns to the reference position when the power is turned on again. There is no problem if you keep it.
次に、上記実施例の作動を説明する。 Next, the operation of the above embodiment will be explained.
レンズ１７及び第４ミラー１８からなる結像手
段１６はその基準位置が等倍複写位置に設定され
ている。この状態で倍率設定釦を押して倍率を指
定すると、その信号でCPUが作動し、ソレノイ
ド２７に通電し、切換えギア２３を倍率設定系の
ギア２８に噛合させるとともに、駆動源２１を駆
動して結像手段１６を指定倍率に応じた位置まで
させて駆動源２１を停止させ、同時に前記ソレノ
イド２７をオフにする。これにより切換えギア２
３はバネ２５の作用で原稿走査系のギア２６に切
換えられる。複写倍率を更に変更した場合も結像
手段１６を変更した倍率に対応した変倍位置に正
確に移動させ、移動後原稿走査系に戻されるよう
になつている。 The reference position of the imaging means 16 consisting of a lens 17 and a fourth mirror 18 is set at the same-magnification copying position. In this state, when the magnification setting button is pressed to specify the magnification, the CPU is activated by the signal, energizes the solenoid 27, engages the switching gear 23 with the gear 28 of the magnification setting system, and drives the drive source 21 to connect. The image means 16 is moved to a position corresponding to the specified magnification, the drive source 21 is stopped, and at the same time the solenoid 27 is turned off. As a result, switching gear 2
3 is switched to a gear 26 of an original scanning system by the action of a spring 25. Even when the copying magnification is further changed, the image forming means 16 is accurately moved to a variable magnification position corresponding to the changed magnification, and then returned to the document scanning system after the movement.
前記操作後、コピー開始釦を押すと、前記駆動
源２１が駆動され、原稿台ガラス又は光源を含む
光学系を移動し、原稿走査が行われ、結像手段
（レンズ及び第４ミラー）１６にて設定された倍
率の光像を感光体１９に結像する。 After the above operation, when the copy start button is pressed, the drive source 21 is driven, moves the document table glass or the optical system including the light source, scans the document, and images the image forming means (lens and fourth mirror) 16. A light image with a set magnification is formed on the photoreceptor 19.
上記の如く倍率設定釦が押され、ソレノイド２
７に通電されて切換えギア２３が倍率設定系のギ
ア２８に揺動して噛合した場合において、その切
換え回数が設定器３２で予め設定された数とセン
ター２９からの信号をカウントしているカウンタ
ー３０の数とが一致した場合には制御手段３１は
結像手段１６をその基準位置に戻す作動信号を駆
動源２１に出力し、これにより該結像手段１６が
基準位置に戻つたことを基準位置検出センサー２
０が検出して、その検出信号を制御手段３１が受
領すると、駆動源２１を停止する。そして、この
位置から改めて先に倍率設定釦により選択された
倍率に応じた位置に結像手段１６を移動させるよ
うに作動する。 As shown above, the magnification setting button is pressed and solenoid 2
7 is energized and the switching gear 23 swings and engages with the gear 28 of the magnification setting system, the counter counts the number of switching times preset by the setting device 32 and the signal from the center 29. 30, the control means 31 outputs an actuation signal to the drive source 21 to return the imaging means 16 to its reference position, thereby indicating that the imaging means 16 has returned to its reference position. Position detection sensor 2
0 is detected, and when the control means 31 receives the detection signal, the drive source 21 is stopped. Then, the image forming means 16 is operated to move from this position to a position corresponding to the magnification previously selected by the magnification setting button.
なお、前記兼用駆動源としてステツプモータを
使用する場合には該モータの振動が光学系へ伝達
することも考えられるので、かかる場合には第３
図示の如く原稿走査系をベルト駆動方式にすれば
問題ないことは言うまでもない。 Note that when a step motor is used as the dual-purpose driving source, vibrations of the motor may be transmitted to the optical system.
Needless to say, there will be no problem if the document scanning system is of a belt drive type as shown in the figure.
このように、この発明によれば結像手段の移動
と、原稿走査の駆動源が切換え手段を介して共用
されているズーム複写機において、前記切換え手
段の切換え回数に応じて結像手段を基準位置に戻
す制御手段を備えたことを特徴としているから、
結像手段への動力伝達系にギアトレインが用いら
れ、そそのバツクラツシユがある場合でも、ま
た、切換え手段を構成する倍率設定ギアと切換え
ギアの断続時にギアの歯先同士のぶつかり合いに
より歯のずれがある場合でも、適時結像手段を基
準位置に戻して再スタートさせるので、これらの
場合に生ずる誤差が累積されることがないという
優れた効果を奏するものである。
As described above, according to the present invention, in a zoom copying machine in which the drive source for moving the image forming means and for scanning the original is shared through the switching means, the image forming means is set as a reference according to the number of times the switching means is switched. Because it is characterized by having a control means for returning it to the position,
Even if a gear train is used in the power transmission system to the image forming means and there is a bump in the gear train, there is also a possibility that the teeth of the gears collide with each other when the magnification setting gear and the switching gear that make up the switching means are connected. Even if there is a deviation, the imaging means is returned to the reference position and restarted in a timely manner, which provides an excellent effect in that errors occurring in these cases are not accumulated.
図はこの発明の実施例を示し、第１図はズーム
複写機の光学系を示す概略構成図、第２図は結像
手段と原稿走査との駆動源を共用させた場合の切
換え手段と、結像手段の移動制御手段の概略構成
図、第３図は切換え手段の他の例を示す概略構成
図である。
１６……結像手段（レンズ１７及び第４ミラー
１８）、１９……感光体、２０……基準位置検出
センサー、２１……駆動源、２３……切換えギ
ア、２６……原稿走査系のギア、２７……ソレノ
イド、２８……倍率設定系のギア、２９……倍率
設定回数の検出センサー、３０……カウンター、
３１……制御手段、３２……切換え回数の設定
器。
The figures show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram showing the optical system of a zoom copying machine, and FIG. 2 shows a switching means when the driving source is shared between the imaging means and document scanning. FIG. 3 is a schematic diagram of the movement control means for the imaging means, and FIG. 3 is a schematic diagram showing another example of the switching means. 16... Imaging means (lens 17 and fourth mirror 18), 19... Photoreceptor, 20... Reference position detection sensor, 21... Drive source, 23... Switching gear, 26... Original scanning system gear , 27...Solenoid, 28...Magnification setting gear, 29...Magnification setting number detection sensor, 30...Counter,
31...Control means, 32...Switching frequency setting device.
Claims (1)
え手段を介して共用されているズーム複写機にお
いて、前記切換え手段の切換え回数に応じて結像
手段を基準位置に戻す制御手段を備えたことを特
徴とするズーム複写機。1. A zoom copying machine in which the driving source for moving the imaging means and for scanning the original is shared through a switching means, comprising a control means for returning the imaging means to a reference position according to the number of times the switching means is switched. A zoom copying machine characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12106385A JPS61278834A (en) | 1985-06-04 | 1985-06-04 | Zoom copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12106385A JPS61278834A (en) | 1985-06-04 | 1985-06-04 | Zoom copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61278834A JPS61278834A (en) | 1986-12-09 |
| JPH0462570B2 true JPH0462570B2 (en) | 1992-10-06 |
Family
ID=14801920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12106385A Granted JPS61278834A (en) | 1985-06-04 | 1985-06-04 | Zoom copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61278834A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57188068A (en) * | 1981-05-15 | 1982-11-18 | Ricoh Co Ltd | Variable magnification optical system for copying machine |
| JPS592026A (en) * | 1982-06-28 | 1984-01-07 | Canon Inc | Variable power image forming device |
-
1985
- 1985-06-04 JP JP12106385A patent/JPS61278834A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61278834A (en) | 1986-12-09 |
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