JPS59125720A - Device for converting magnification of image of copying machine - Google Patents

Device for converting magnification of image of copying machine

Info

Publication number
JPS59125720A
JPS59125720A JP18383A JP18383A JPS59125720A JP S59125720 A JPS59125720 A JP S59125720A JP 18383 A JP18383 A JP 18383A JP 18383 A JP18383 A JP 18383A JP S59125720 A JPS59125720 A JP S59125720A
Authority
JP
Japan
Prior art keywords
mirror
lens
cam
pulleys
belt
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
JP18383A
Other languages
Japanese (ja)
Inventor
Hiroshi Inoue
弘 井上
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.)
Fujinon Corp
Original Assignee
Fujinon Corp
Fuji Photo Optical 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 Fujinon Corp, Fuji Photo Optical Co Ltd filed Critical Fujinon Corp
Priority to JP18383A priority Critical patent/JPS59125720A/en
Publication of JPS59125720A publication Critical patent/JPS59125720A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/04Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

PURPOSE:To simplify the structure of the titled device and to reduce the height of said device to reduce in size by connecting a lens board to a belt and moving a mirror board by a cam rotated by the belt. CONSTITUTION:A toothed belt 23 is arranged so as to surrounded the mirror board 15 and the lens board 20 wound by 4 pulleys 24-27. The cam 30 is fitted coaxially with the pulley 25 and a follow-up pin 31 fitted to a bearing part 15a is abutted to the cam 30. When a motor 28 starts to rotate, the toothed belt 23 rotates and pulls and moves the lens board 20 along guiding rods 21, 22 in the optical axis direction. Simultaneously with the movement, the cam 30 rotates and pushes the mirror board 15 through the follow-up pin 31 to move the mirror board 15 in the optical axis direction. The positions of the lens board 20 and the mirror board 15 are adjusted by the toothed belt 23 and the cam 30, so that a required magnification of an image can be obtained.

Description

【発明の詳細な説明】 本発明は複写機の像倍率変換装置に関するものである。[Detailed description of the invention] The present invention relates to an image magnification conversion device for a copying machine.

複写機は、原稿面と結像面とが定まっているため、レン
ズ系の位置を変えることによシ、物点距離及び像点距離
を調節して紙サイズに応じた像倍率を得るようになって
いる。第1図は複写機の光学系を示すものであり、透明
な原稿台1の下方に照明部2が配置されている。この照
明部2は、光源3、光源3から放出された光を原稿台1
に向けて反射させるミラー4,5、及び原稿台1に載置
された原稿で反射され前記ミラー4,5の間に形成され
た隙間を通った光を反射するミラー6から構成されてい
る。
In a copying machine, the document surface and the image formation surface are fixed, so by changing the position of the lens system, the object point distance and image point distance can be adjusted to obtain the image magnification according to the paper size. It has become. FIG. 1 shows the optical system of a copying machine, in which an illumination section 2 is arranged below a transparent document table 1. As shown in FIG. The illumination unit 2 includes a light source 3 and a light emitted from the light source 3.
The mirror 6 includes mirrors 4 and 5 that reflect light toward the document table 1, and a mirror 6 that reflects light that is reflected by a document placed on a document table 1 and passes through a gap formed between the mirrors 4 and 5.

前記ミラー6で反射された光は、ミラー7.8、レンズ
系9、ミラー10〜12を経て感光ドラム13の外周に
入射する。複写時には、照明部2と、ミラー7.8を保
持したミラ一台14とが矢線方向へ移動し、物点距離を
一定に保ったまま原稿を照明する。これは、ミラ一台1
4の移動量が照明部2の移動量の半分になるようにすれ
ばよい。
The light reflected by the mirror 6 passes through the mirror 7.8, the lens system 9, and the mirrors 10 to 12, and then enters the outer periphery of the photosensitive drum 13. During copying, the illumination unit 2 and the mirror unit 14 holding the mirrors 7.8 move in the direction of the arrow to illuminate the document while keeping the object distance constant. This is Mira 1
The amount of movement of the illumination unit 2 may be half of the amount of movement of the illumination unit 2.

像倍率の変換時には、レンズ系9が光軸に沿って移動し
て物点距離と像点距離とを変える。複写機においては、
原稿台1と感光ドラム13との位置を変えることが極め
て困難であるため、レンズ系9だけの移動では、紙サイ
ズによって定する所定の像倍率を得ることができない。
When converting the image magnification, the lens system 9 moves along the optical axis to change the object point distance and the image point distance. In copy machines,
Since it is extremely difficult to change the positions of the document table 1 and the photosensitive drum 13, a predetermined image magnification determined by the paper size cannot be obtained by moving only the lens system 9.

そこで、接与時に移動しないミラー10.11を保持し
たミラ一台15を光軸方向へ移動して像点距離を調節し
ている。なお、像倍率変換に伴なうレンズ系9及びミラ
一台15の移動量は、レンズ公式及び像倍率の公式から
簡単に求めることができる。
Therefore, the image point distance is adjusted by moving a single mirror 15 holding mirrors 10 and 11 that do not move during application in the optical axis direction. Note that the amount of movement of the lens system 9 and the mirror unit 15 accompanying the image magnification conversion can be easily determined from the lens formula and the image magnification formula.

従来の像倍率変換装置としては、レンズ系9を保持した
レンズ台とミ1ラ一台15を別々のベルトに連結し、こ
れらのベルトを2個のパルスモータで駆動するようにし
たものがある。しかし、この装置では2個のパルスモー
タが必要であるから、高価になるとともに、パルスモー
タを収納するスペースを確保することが困難であるとい
う欠点がある。
As a conventional image magnification conversion device, there is one in which a lens stand holding a lens system 9 and a single mirror 15 are connected to separate belts, and these belts are driven by two pulse motors. . However, since this device requires two pulse motors, it is expensive and has the disadvantage that it is difficult to secure a space to accommodate the pulse motors.

別の像倍率変換装置としては、1組のモータとベルトと
でレンズ台を移動するとともに、レンズ台とミラ一台と
の間にベルクランクを配置し、レンズ台に固着したカム
板によってベルクランクを枢動し、このベルクランクで
ミラ一台を光軸方向へ移動するようにしたものがある。
Another image magnification conversion device uses a set of motors and belts to move the lens base, and a bell crank is placed between the lens base and a mirror, and the bell crank is moved by a cam plate fixed to the lens base. There is one in which the mirror is pivoted and the bell crank is used to move one mirror in the direction of the optical axis.

この装置においては、高さが高く、かつ光軸方向に長く
延びた大きなカム板と、ベルクランクとが必要であるた
め、構造が複雑になるとともに、レンズ台の移動に伴な
ってカム板の占有空間が大きくなるという難点がある。
This device requires a large cam plate that is tall and extends long in the optical axis direction, and a bell crank, which makes the structure complicated and causes the cam plate to change as the lens stand moves. The problem is that it takes up a large amount of space.

本発明は上記欠点に鑑み、構造が簡単で、かつ高さを低
くすることができるようにした像倍率変換装置を提供す
ることを目的とするものである。
SUMMARY OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide an image magnification conversion device that has a simple structure and can be made low in height.

以下図面を参照して本発明の一実施例について詳細に説
明する。
An embodiment of the present invention will be described in detail below with reference to the drawings.

第2図は本発明の実施例を示す斜視図であり、第3図は
その平面図である。これらの図面中で、第1図と同一の
部分には同一の符号が付しである。
FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a plan view thereof. In these drawings, the same parts as in FIG. 1 are given the same reference numerals.

レンズ台20の一方には長さの短かい軸受部20aが設
けられ、他方には安定性を確保するために長さが長い軸
受部20bが設けられている。この軸受部20aは案内
棒21に嵌合し、軸受部20bは案内棒22に嵌合して
いる。
A short bearing portion 20a is provided on one side of the lens stand 20, and a long bearing portion 20b is provided on the other side to ensure stability. The bearing portion 20a fits into the guide rod 21, and the bearing portion 20b fits into the guide rod 22.

ミラ一台15は、長さが長い軸受部15aと短かい軸受
部15bとを有し、軸21.22にそれぞれ摺動自在に
嵌合している。ここで、レンズ台20とミラ一台15と
は、軸受部の長さが逆になっているから九両者を接近さ
せることができる。
The mirror unit 15 has a long bearing part 15a and a short bearing part 15b, which are slidably fitted to the shafts 21 and 22, respectively. Here, since the lengths of the bearing parts of the lens stand 20 and the mirror stand 15 are opposite, they can be brought close to each other.

前記ミラ一台15及びレンズ台20とを囲むように歯付
ベルト23が配されておυ、4個のプーリ24〜27に
巻装されている。プーリ24は、モータ28の回転軸2
8aに固着されており、駆動ブーりとして用いられる。
A toothed belt 23 is arranged so as to surround the mirror unit 15 and the lens stand 20, and is wound around four pulleys 24-27. The pulley 24 is connected to the rotating shaft 2 of the motor 28.
8a, and is used as a drive boot.

モータ28は、倍率指定キーが押された時に始動し、レ
ンズ台20に設けた光学的位置検出器(図示せず)によ
って所望の倍率位置に達したことが検知された時に停止
するようになっている。
The motor 28 starts when the magnification specifying key is pressed, and stops when the optical position detector (not shown) provided on the lens stand 20 detects that the desired magnification position has been reached. ing.

前記プーリ25と同軸にカム30が取り付けられており
、軸受部15aに設けた従動ビン31がこのカム30に
当接している。このカム30は、像倍率変換のために、
レンズ台20が移動した時に、像点距離を補正するよう
な形状を持っており、スプリング32に抗してミラ一台
15を光軸方向へ移動するつ 前記レンズ台20は、軸受部20bに設けた連結具33
を介して歯付ベルト23に連結されている。このように
レンズ台20及びミラ一台15は、安定性を確保するた
めに長さを長くした軸受部15a、20bに力を作用さ
せて移動きせるようにしたから、その移動が円滑となる
。々お、プーリ26゜27を省略してもよいことは勿論
であり、この場合には軸受部20aに歯付ベルト23を
連結すればよい。
A cam 30 is attached coaxially with the pulley 25, and a driven pin 31 provided on the bearing portion 15a is in contact with the cam 30. This cam 30 is used for image magnification conversion.
It has a shape that corrects the image point distance when the lens stand 20 moves, and when the mirror unit 15 is moved in the optical axis direction against the spring 32, the lens stand 20 is attached to the bearing part 20b. Connector 33 provided
It is connected to the toothed belt 23 via. In this way, the lens stand 20 and the mirror stand 15 are moved by applying force to the bearings 15a and 20b, which are made longer in length to ensure stability, so that the movement becomes smooth. Of course, the pulleys 26 and 27 may be omitted, and in this case, the toothed belt 23 may be connected to the bearing portion 20a.

第3図において、符号34は両端が折り曲げられたフレ
ームであシ、これに案内棒21.22が架設され、また
プーリ24〜27.モータ28等が堆り付けられている
In FIG. 3, reference numeral 34 denotes a frame with both ends bent, on which guide rods 21, 22 are installed, and pulleys 24-27. A motor 28 and the like are attached.

次に上記実施例の作用について説明する。モータ28が
回転すると、歯付ベルト23が回転してレンズ台20を
引張り、これを案内棒21.22に沿って光軸方向へ移
動する。これと同時にカム30が回転し、従動ビン31
を介してミラ一台15を押してこれを光軸方向へ移動す
る。この歯付ベルト23とカム30とによシ、レンズ台
20及びミラ一台15の位置が調節され、所望の像倍率
を得ることができる。
Next, the operation of the above embodiment will be explained. When the motor 28 rotates, the toothed belt 23 rotates and pulls the lens stand 20, moving it along the guide rods 21, 22 in the direction of the optical axis. At the same time, the cam 30 rotates, and the driven bin 31
The mirror unit 15 is pushed through the mirror 15 to move it in the optical axis direction. The positions of the lens stand 20 and the mirror stand 15 are adjusted by the toothed belt 23 and the cam 30, and a desired image magnification can be obtained.

上記構成を有する本発明は、ベルトにレンズ台を連結す
るとともに、このベルトで回転されるカムによってミラ
一台を移動するようにしたから、構造が簡単になるとと
もに、高さを低くすることができ、占有空間が狭い小型
の複写機に容易に組み込むことができる。
In the present invention having the above configuration, the lens stand is connected to the belt, and one mirror is moved by a cam rotated by the belt, so the structure is simple and the height can be reduced. It can be easily incorporated into a small-sized copying machine that occupies a small space.

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

第1図は複写機の光学系を示す説明図、第2図は本発明
の要部を示す斜視図、第3図は平面図である。 1・・・原稿台 2・・・照明部 3〜6.7.8.10〜12・嗜・ミラー9・Φ・レン
ズ系 13・・・感光ドラム 15−拳・、フ 。 20・・・レンズ台 21、22・・・案内棒 24〜27・・・プーリ 28・・・モータ 30・・Φカム 31・・・従動ピン 33・・・連結具。
FIG. 1 is an explanatory diagram showing the optical system of a copying machine, FIG. 2 is a perspective view showing the main parts of the present invention, and FIG. 3 is a plan view. 1... Original table 2... Illumination section 3-6. 20... Lens stands 21, 22... Guide rods 24-27... Pulley 28... Motor 30... Φ cam 31... Follower pin 33... Connector.

Claims (2)

【特許請求の範囲】[Claims] (1)原稿面と結像面との間にレンズ系とミラーとが配
置されており、像倍率の変換時にレンズ系とミラーとが
光軸に沿って移動する複写機において、 前記レンズ系を保持したレンズ台と、前記ミラーを保持
したミラ一台とを一対の案内棒に摺動自在に取り付ける
とともに、少なくとも2個のプーリに巻装され、その一
部が前記案内棒と平行になるようにしたベルトを設け、
このベルトに前記レンズ台を連結し、前記プーリの一方
にカムを取シ付けてミラ一台に固着した従動子に接触さ
せるようにしたことを特徴とする像倍率変換装置。
(1) In a copying machine in which a lens system and a mirror are arranged between a document surface and an image forming surface, and the lens system and mirror move along the optical axis during image magnification conversion, the lens system is The held lens stand and the mirror holding the mirror are slidably attached to a pair of guide rods, and are wound around at least two pulleys so that a part of the mirror is parallel to the guide rod. With a belt that is
An image magnification converting device characterized in that the lens stand is connected to the belt, and a cam is attached to one of the pulleys to bring it into contact with a follower fixed to one of the mirrors.
(2)前記ミラ一台とレンズ台の外側に4個のプーリを
水平に配直し、これらのプーリに巻装されたベルトが2
ケ所において案内棒と平行になるようにするとともに、
この2ケ所の一方にレンズ台の連結部を設け、他方にカ
ムを設けたことを特徴とする特許請求の範囲第1項記載
の像倍率変換装置。
(2) Four pulleys are rearranged horizontally on the outside of the mirror and the lens stand, and the belts wound around these pulleys are
Be parallel to the guide rod at several points, and
2. The image magnification conversion device according to claim 1, wherein a connecting portion of the lens stand is provided at one of the two locations, and a cam is provided at the other location.
JP18383A 1983-01-06 1983-01-06 Device for converting magnification of image of copying machine Pending JPS59125720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18383A JPS59125720A (en) 1983-01-06 1983-01-06 Device for converting magnification of image of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18383A JPS59125720A (en) 1983-01-06 1983-01-06 Device for converting magnification of image of copying machine

Publications (1)

Publication Number Publication Date
JPS59125720A true JPS59125720A (en) 1984-07-20

Family

ID=11466878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18383A Pending JPS59125720A (en) 1983-01-06 1983-01-06 Device for converting magnification of image of copying machine

Country Status (1)

Country Link
JP (1) JPS59125720A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172133A (en) * 1985-01-28 1986-08-02 Ricoh Co Ltd Copying machine with zoom variable power
JPS62188751U (en) * 1986-05-21 1987-12-01
JPS63109429A (en) * 1986-10-28 1988-05-14 Fuji Xerox Co Ltd Optical device

Citations (1)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172133A (en) * 1985-01-28 1986-08-02 Ricoh Co Ltd Copying machine with zoom variable power
JPS62188751U (en) * 1986-05-21 1987-12-01
JPH059717Y2 (en) * 1986-05-21 1993-03-10
JPS63109429A (en) * 1986-10-28 1988-05-14 Fuji Xerox Co Ltd Optical device

Similar Documents

Publication Publication Date Title
US4120578A (en) Continuously variable reduction scanning optics drive
US3609024A (en) Slit exposure device
US4093374A (en) Multiple range variable magnification reproduction machine
US3876302A (en) High speed low inertia scanning system for a copying machine
JPS59125720A (en) Device for converting magnification of image of copying machine
US4531831A (en) Variable magnification image formation apparatus
JPH10257251A (en) Layout structure of motor for driving carrier of image processing unit
US4015892A (en) Optical scanning system for slitwise exposure
JP3466373B2 (en) Image reading device
US4614424A (en) Copying apparatus
US5724173A (en) Optical scanning device
JPH045988B2 (en)
US4998135A (en) Mechanism for moving a projection lens assembly to alter projecting magnification
JP2639188B2 (en) Image reading device
JP3445892B2 (en) Document reading device
JPS5848659Y2 (en) Magnification conversion device for scanning exposure optical system
JP3249241B2 (en) Document reading device
JPS5853546Y2 (en) Rokousouchinokogakukeisadokikou
JP2537120B2 (en) Exposure device for electrophotographic gray-scale photo reproduction device
JP2553215Y2 (en) Exposure optics
KR200153789Y1 (en) Scanning carrage transferring apparatus for image forming device
JP3363582B2 (en) Document reading device
JPS61172133A (en) Copying machine with zoom variable power
JPS61107871A (en) Picture reading device
JP2000075421A (en) Scanning device