JPS63108329A - Optical system driving structure for image forming device - Google Patents
Optical system driving structure for image forming deviceInfo
- Publication number
- JPS63108329A JPS63108329A JP25428486A JP25428486A JPS63108329A JP S63108329 A JPS63108329 A JP S63108329A JP 25428486 A JP25428486 A JP 25428486A JP 25428486 A JP25428486 A JP 25428486A JP S63108329 A JPS63108329 A JP S63108329A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- optical system
- tension
- spring coil
- pulleys
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 60
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 108020003175 receptors Proteins 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は画像形成装置の光学系駆動構造に関し、更に
詳しくは、第１・第２光学系を駆動させる画像形成装置
の光学系駆動構造の改良に関する。Detailed Description of the Invention (a) Industrial Application Field This invention relates to an optical system drive structure for an image forming apparatus, and more specifically, an optical system drive structure for an image forming apparatus that drives first and second optical systems. Regarding improvements.
（ロ）従来の技術
複写機として、第１光学系と第２光学系とを２：１の速
度比で左右方向に走査移動させて受像体上に画像露光を
おこなうものが知られている。例えば第１光学系は光源
及びミラーを有し原稿に沿って左右方向に移動して原稿
全面に光源の光を照射する。一方策２光学系はミラーを
宵し第１光学系と同方向に、しかし１／２の速度で移動
する。そして原稿からの光は、第１光学系のミラー、次
いで第２光学系のミラーを反射し、複写機に別途設けら
れ１ニレンズを介して、回転する静電感光体上に集束さ
れ静電潜像を形成する。もちろんこの静電潜像が用紙に
複写される複写像に対応するものである。(b) Conventional Technology A known copying machine exposes an image on an image receptor by scanning and moving a first optical system and a second optical system in the left-right direction at a speed ratio of 2:1. For example, the first optical system includes a light source and a mirror, moves in the left-right direction along the document, and irradiates the entire surface of the document with light from the light source. On the other hand, the second optical system uses a mirror and moves in the same direction as the first optical system, but at 1/2 the speed. The light from the original is reflected by the mirror of the first optical system and then by the mirror of the second optical system, and is focused on the rotating electrostatic photoreceptor through two lenses separately provided in the copying machine, and is focused on the electrostatic photoreceptor. form an image. Of course, this electrostatic latent image corresponds to the copy image that is copied onto the paper.
しかるに第１光学系と第２光学系の駆動は、複写性能に
直接影響し、きわめて重要であるが、具体的にそれらの
光学系の駆動を行なうための装置としては例えば、第１
光学系の両横側にそれぞれ設けられた第１光学系固定端
と、第２光学系の両横側にそれぞれ設けられた可動プー
リと、両光学系の走査路の両横側にそれぞれ設けられた
複数の固定プーリとに、第１ワイヤとと第２ワイヤとを
張設し、これらの両ワイヤには、共通ワイヤドラムによ
って正・反転駆動力を供給できるようにしたものが知ら
れている例えば特開昭５９−１９１０２８号公報参照）
。However, the driving of the first optical system and the second optical system is extremely important as it directly affects the copying performance.
A first optical system fixed end provided on both sides of the optical system, a movable pulley provided on both sides of the second optical system, and a movable pulley provided on both sides of the scanning path of both optical systems. It is known that a first wire and a second wire are stretched across a plurality of fixed pulleys, and both wires can be supplied with forward and reverse driving force by a common wire drum. For example, see Japanese Patent Application Laid-open No. 59-191028)
.
（ハ）発明が解決しようとする問題点
ところで、上述のような両光学系の走査路の両横側にそ
れぞれ独立の駆動ワイヤ（第１ワイヤ及び第２ワイヤ）
を張設した光学系駆動装置においては、各構成部品の寸
法及び取付誤差などにより、両横側の駆動ワイヤのテン
ション程度にアンバランスが生じやすく、それによって
両光学系の駆動、特に第１光学系と第２光学系の平行駆
動がそこなわれて複写像にゆがみを生じることがあった
。(c) Problems to be solved by the invention By the way, independent drive wires (first wire and second wire) are provided on both sides of the scanning paths of both optical systems as described above.
In an optical system drive device with a tensioned optical system, the tension of the drive wires on both sides tends to become unbalanced due to the dimensions and mounting errors of each component, and this causes the drive of both optical systems, especially the first optical system. Parallel driving between the optical system and the second optical system may be impaired, causing distortion in the copied image.
（ニ）問題点を解決するための手段及びその作用この発
明は、画像形成装置本体内に設置され、２：１の速度比
にて一方向に走査移動し受像体上に画像露光を行なう第
１光学系及び第２光学系と、第１光学系の両横側にそれ
ぞれ設けられた第１光学系固定端と、第２光学系の両横
側にそれぞれ設けられた可動プーリと、両光学系の走査
路の両横側にそれぞれ設けられたワイヤ駆動ドラムを含
む少なくともｌ対の固定プーリ及び遊動プーリと、これ
らの各第１光学系固定端、可動プーリ、固定プーリ及び
遊動プーリを介し対向して別々に張設された第１ワイヤ
及び第２ワイヤと、前記遊動プーリの各支軸を介して第
１ワイヤ及び第２ワイヤにそれぞれテンションを付加す
るテンション付加手段とからなり、
このテンション付加手段が、複数の固定ガイドビンと、
前記遊動プーリの各支軸間にそれらの固定ガイドビンの
横銅を介して張設されたテンションワイヤと、このテン
ションワイヤの途中に介接されたスプリングコイルとか
らなる画像形成装置の光学系駆動構造である。(d) Means for solving the problem and its effect The present invention provides a device that is installed in the main body of an image forming apparatus, scans in one direction at a speed ratio of 2:1, and exposes an image onto an image receptor. a first optical system and a second optical system, a first optical system fixed end provided on both lateral sides of the first optical system, a movable pulley provided on both lateral sides of the second optical system, and both optical systems. At least l pairs of fixed pulleys and floating pulleys including wire drive drums provided on both sides of the scanning path of the system, and the first optical system facing each other via the fixed end, the movable pulley, the fixed pulley, and the floating pulley. a first wire and a second wire stretched separately, and a tension applying means for applying tension to the first wire and the second wire, respectively, via each spindle of the floating pulley; The means includes a plurality of fixed guide bins;
An optical system drive for an image forming apparatus comprising a tension wire stretched between the spindles of the floating pulleys via the horizontal copper of the fixed guide bin, and a spring coil interposed in the middle of the tension wire. It is a structure.
すなわち、この発明は第１ワイヤ及び第２ワイヤを張設
するプーリとして１対の遊動プーリを含め、その遊動プ
ーリの各支軸を共通のスプリングコルを介して引張り結
合することによって、第１ワイヤと第２ワイヤとに対す
るテンションの付与が同一となり、特に第１ワイヤと第
２ワイヤとの平行駆動が可能になって複写機のゆがみが
防止できる。That is, the present invention includes a pair of floating pulleys as pulleys for tensioning the first wire and the second wire, and connects the respective spindles of the floating pulleys by tension via a common spring col. The same tension is applied to the first wire and the second wire, and in particular, it becomes possible to drive the first wire and the second wire in parallel, thereby preventing distortion of the copying machine.
（ホ）実施例
以下図に示す実施例に基づいてこの発明を詳述する。な
お、これによってこの発明が限定されるものではない。(e) Examples The present invention will be described in detail below based on examples shown in the drawings. Note that this invention is not limited to this.
複写機Ｆの光学系駆動装置１は、複写機本体３２内に設
置され、２：ｌの速度比にて一方向に走査移動しレンズ
３３及び第４ミラー３４を介して感光体ドラム３５上に
画像露光を行なう光源３６及び第１ミラー３７からなる
第１光学系２及び第２ミラー３８及び第３ミラー３９か
らなる第２光学系３と、その第１光学系の両横側にそれ
ぞれ設けられた第１光学系固定・端４．５と、第２光学
系３０両横側にそれぞれ設けられた可動プーリ６゜７と
、両光学系２．３の走査路の両横側にそれぞれ設けられ
た固定プーリ８，９及び遊動プーリ１０．１１と、これ
らの各第１光学系固定端４゜５及び可動プーリ６．７、
固定プーリ８．９及び遊動プーリ１０，１１を介し対向
して張設された第１ワイヤ１２及び第２ワイヤ１３と、
これらの第１ワイヤ及び第２ワイヤが共に巻回されるワ
イヤ駆動ドラム１４．１５と、前記遊動プーリ１０゜１
１の各支軸１６．１７を介して第１ワイヤ１２及び第２
ワイヤ１３にそれぞれテンションを付加するテンション
付加手段１８とからなる。なお、１９．２０は第１ワイ
ヤ１２の複写機本体に対する両固定端、２１．２２は第
２ワイヤ１３の同じく両固定端である。２３はワイヤ駆
動ドラム１４゜１５の駆動軸であり、モータ２′４から
ギアｚ５．２Ｇを介して回転駆動力の伝達を受ける。The optical system drive device 1 of the copying machine F is installed in the copying machine main body 32, and scans in one direction at a speed ratio of 2:1, and passes the optical system onto the photosensitive drum 35 via the lens 33 and the fourth mirror 34. A first optical system 2 consisting of a light source 36 and a first mirror 37 for performing image exposure, and a second optical system 3 consisting of a second mirror 38 and a third mirror 39, each provided on both sides of the first optical system. a fixed end 4.5 of the first optical system, movable pulleys 6.7 provided on both sides of the second optical system 30, and movable pulleys 6.7 provided on both sides of the scanning path of both optical systems 2.3. fixed pulleys 8, 9 and floating pulleys 10.11, each of these first optical system fixed ends 4.5 and movable pulleys 6.7,
A first wire 12 and a second wire 13 are stretched across from each other via a fixed pulley 8.9 and floating pulleys 10 and 11;
A wire drive drum 14.15 on which the first wire and the second wire are wound together, and the floating pulley 10°1.
The first wire 12 and the second
and tension applying means 18 for applying tension to each wire 13. Note that 19.20 indicates both fixed ends of the first wire 12 relative to the main body of the copying machine, and 21.22 indicates both fixed ends of the second wire 13. Reference numeral 23 designates a drive shaft of the wire drive drums 14.about.15, and receives rotational driving force from the motor 2'4 via a gear z5.2G.
而してテンション付加手段１８は１対の固定ガイドピン
２７，２Ｂと、スプリングコイル２９と、前記遊動プー
リｌＯの支軸１６とスプリングコイル２９の一端とを固
定ガイドピン２７の横銅を介して張設された第１テンシ
ヨンワイヤ３０と、前記遊動プーリＩｔの支軸１７とス
プリングコイル２９の（上端とを固定ガイドピン２８の
横銅を介して張設された第２テンシヨンワイヤ３１とか
らなる。The tension applying means 18 connects the pair of fixed guide pins 27, 2B, the spring coil 29, the support shaft 16 of the floating pulley IO, and one end of the spring coil 29 via the horizontal copper of the fixed guide pin 27. A first tension wire 30 is stretched, and a second tension wire 31 is stretched between the support shaft 17 of the floating pulley It and the upper end of the spring coil 29 via the horizontal copper of the fixed guide pin 28. Consisting of
かくして光学系駆動装置ｌの各部品には、若干の寸法誤
差、取付誤差などがさけられず、第１ワイヤ１２と第２
ワイヤ１３とのテンションにアンバランスを起こすこと
があるが、そ−のアンバランスが上述のテンション付加
手段１Ｂによって解消できる。つまり遊動プーリ１０，
１１を共通のスプリングコイル２９を介して引張ってい
るので、第１ワイヤ１２と第２ワイヤ１３のテンション
のアンバランスがスプリングコイル２９に吸収され、従
って第１光学系２及び第２光学系３を平行駆動（走査移
動）でき、それによって良質な複写画像が得られる。In this way, each part of the optical system driving device l is subject to slight dimensional errors, installation errors, etc., and the first wire 12 and the second wire
Although an imbalance may occur in the tension with the wire 13, this imbalance can be eliminated by the above-mentioned tension adding means 1B. In other words, the floating pulley 10,
11 is pulled through a common spring coil 29, the tension imbalance between the first wire 12 and the second wire 13 is absorbed by the spring coil 29, and therefore the first optical system 2 and the second optical system 3 are It can be driven in parallel (scanning movement), thereby obtaining high-quality copied images.
更に第１光学系２及び第２光学系３の逆転（折り返し移
動）時には、両ワイヤ１２．１３に大きなショックが加
わる。しかし遊動プーリ１６゜１７が固定ではなく遊動
状態にあるので、それらのショックの吸収又は分散がよ
く行なわれ、結局両光学系の振動を抑制できて良質な複
写画像を得ることにつながる。Further, when the first optical system 2 and the second optical system 3 are reversed (folded back), a large shock is applied to both wires 12 and 13. However, since the floating pulleys 16 and 17 are not fixed but in a floating state, these shocks are well absorbed or dispersed, and the vibrations of both optical systems can be suppressed, resulting in a high quality copy image.
（へ）発明の効果
この発明によれば遊動プーリの各支軸を共通のスプリン
グコルを介して引張り結合することによって、第１ワイ
ヤと第２ワイヤとに対するテンションの付与が同一とな
り、特に第１ワイヤと第２ワイヤとの平行駆動が可能に
なつて複写機のゆがみが防止できる。(F) Effects of the Invention According to the present invention, by tension-coupling each spindle of the floating pulley via a common spring col, the same tension is applied to the first wire and the second wire. Since the wire and the second wire can be driven in parallel, distortion of the copying machine can be prevented.
第１図はこの発明の一実施例を示す説明斜視図、第２図
はその実施例を内蔵する複写機の全体構成説明図である
。
ｌ・・・・光学系駆動装置、
２・・・・第１光学系、 ３・・・・第２光学系、
４．５・・・・第１光学系固定端、
６．７・・・・可動プーリ、８．９・・・・固定プーリ
、１０．１．１・・・・遊動プーリ、
１２・・・・第１ワイヤ、 １３・・・・第２ワイヤ
、１４．１５・・・・ワイヤ駆動ドラム、１６．１７・
・・・支軸、
１８・・・・テンション付加手段、
２７．２８・・・・固定ガイドピン、
２９・・・・スプリングコイル、
３０・・・・第１テンシヨンワイヤ、
３１・・・・第２テンシヨンワイヤ。FIG. 1 is an explanatory perspective view showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the overall configuration of a copying machine incorporating the embodiment. l...Optical system drive device, 2...First optical system, 3...Second optical system,
4.5...First optical system fixed end, 6.7...Movable pulley, 8.9...Fixed pulley, 10.1.1...Idle pulley, 12...・First wire, 13...Second wire, 14.15...Wire drive drum, 16.17...
... Support shaft, 18 ... Tension applying means, 27.28 ... Fixed guide pin, 29 ... Spring coil, 30 ... First tension wire, 31 ... 2nd tension wire.
Claims (1)
て一方向に走査移動し受像体上に画像露光を行なう第１
光学系及び第２光学系と、第１光学系の両横側にそれぞ
れ設けられた第１光学系固定端と、第２光学系の両横側
にそれぞれ設けられた可動プーリと、両光学系の走査路
の両横側にそれぞれ設けられたワイヤ駆動ドラムを含む
少なくとも１対の固定プーリ及び遊動プーリと、これら
の各第１光学系固定端、可動プーリ、固定プーリ及び遊
動プーリを介し対向して別々に張設された第１ワイヤ及
び第２ワイヤと、前記遊動プーリの各支軸を介して第１
ワイヤ及び第２ワイヤにそれぞれテンションを付加する
テンション付加手段とからなり、 このテンション付加手段が、複数の固定ガイドピンと、
前記遊動プーリの各支軸間にそれらの固定ガイドピンの
横胴を介して張設されたテンションワイヤと、このテン
ションワイヤの途中に介接されたスプリングコイルとか
らなる画像形成装置の光学系駆動構造。[Claims] 1. A first device installed in the main body of the image forming apparatus, which scans in one direction at a speed ratio of 2:1 and exposes an image onto the image receptor.
An optical system, a second optical system, a first optical system fixed end provided on both lateral sides of the first optical system, a movable pulley provided on both lateral sides of the second optical system, and both optical systems. at least one pair of fixed pulleys and floating pulleys each including a wire drive drum provided on both sides of the scanning path of the first optical system; A first wire and a second wire are stretched separately, and a first wire is connected to the first wire through each spindle of the floating pulley.
The tension applying means applies tension to the wire and the second wire, respectively, and the tension applying means includes a plurality of fixed guide pins,
An optical system drive for an image forming apparatus comprising a tension wire stretched between each spindle of the floating pulley via the horizontal body of the fixed guide pin, and a spring coil interposed in the middle of the tension wire. structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25428486A JPS63108329A (en) | 1986-10-25 | 1986-10-25 | Optical system driving structure for image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25428486A JPS63108329A (en) | 1986-10-25 | 1986-10-25 | Optical system driving structure for image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63108329A true JPS63108329A (en) | 1988-05-13 |
Family
ID=17262829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25428486A Pending JPS63108329A (en) | 1986-10-25 | 1986-10-25 | Optical system driving structure for image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63108329A (en) |
-
1986
- 1986-10-25 JP JP25428486A patent/JPS63108329A/en active Pending
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