JP3418205B2 - Traveling body drive - Google Patents
Traveling body driveInfo
- Publication number
- JP3418205B2 JP3418205B2 JP18249192A JP18249192A JP3418205B2 JP 3418205 B2 JP3418205 B2 JP 3418205B2 JP 18249192 A JP18249192 A JP 18249192A JP 18249192 A JP18249192 A JP 18249192A JP 3418205 B2 JP3418205 B2 JP 3418205B2
- Authority
- JP
- Japan
- Prior art keywords
- traveling body
- guide shaft
- traveling
- belt
- 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.)
- Expired - Fee Related
Links
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スキャナやファクシミ
リの読取部、又は、複写機の露光系、特に、１／２の速
度で２組のミラーを走査してスリット露光を行う走行体
駆動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanning unit of a scanner or a facsimile, or an exposure system of a copying machine, and more particularly, a running body driving apparatus for scanning two sets of mirrors at a speed of 1/2 for slit exposure. Regarding
【０００２】[0002]
【従来の技術】従来、原稿台上に置かれた原稿を、読取
用光源を備えた第１走行体と、この第１走行体と１／２
の速度比をもつ第２走行体とを同一の副走査方向に走査
して前記原稿に記載された画像を読取り、この読取られ
た画像をレンズにより集光して受光素子に投影結像させ
ることによって原稿画像を得る走行体駆動装置として
は、例えば、以下に述べるような種々のものがある。そ
の第一の従来例として、特開平３−２３４３５号公報に
「走行体駆動装置」なるタイトルで本出願人により出願
され開示されているものがある。これは、１：１／２の
速度で同一方向に移動する第１及び第２走行体の片側又
は両側に設けられた動プーリ間にワイヤを掛け渡した状
態で、第１、第２走行体のいずれか一方をリニアモータ
で駆動し、ワイヤと動プーリの作用で他方の走行体を駆
動する。2. Description of the Related Art Conventionally, a first traveling body provided with a light source for reading an original placed on a document table, and a half of the first traveling body.
A second traveling body having a speed ratio of 2 is scanned in the same sub-scanning direction to read an image described on the document, and the read image is condensed by a lens to be projected and imaged on a light receiving element. As a traveling body drive device for obtaining a document image by, for example, there are various types as described below. As a first conventional example thereof, there is one disclosed and filed by the present applicant under the title of "traveling body driving device" in Japanese Patent Laid-Open No. 23435/1993. This is a state in which a wire is stretched between moving pulleys provided on one side or both sides of the first and second traveling bodies that move in the same direction at a speed of 1: 1/2, and the first and second traveling bodies are One of these is driven by a linear motor, and the other traveling body is driven by the action of the wire and the moving pulley.
【０００３】また、その第二の従来例として、特開昭６
１−１１０１２８号公報に「露光光学装置」なるタイト
ルで開示されているものがある。これは、１：１／２の
速度で移動する第１及び第２走行体の駆動に歯付きベル
トを用いるようにしたものである。この場合、歯付きベ
ルトはワイヤと相異して幅が大きいため、第２走行体に
掛ける動プーリを２つに分割して使用する。このように
歯付きベルトを用いることにより、スリップし易いワイ
ヤの欠点を補うことができる。Further, as a second conventional example thereof, Japanese Patent Laid-Open No.
There is one disclosed in the title of "Exposure optical device" in Japanese Patent Laid-Open No. 1-110128. This is one in which a toothed belt is used to drive the first and second traveling bodies that move at a speed of 1: 1/2. In this case, since the toothed belt has a large width unlike the wire, the moving pulley to be hung on the second traveling body is divided into two and used. By using the toothed belt in this manner, it is possible to compensate for the defects of the wire that easily slips.
【０００４】さらに、その第三の従来例として、特開昭
５０−３８５２９号公報に「スリット露光装置」なるタ
イトルで開示されているものがある。これは、１／２の
走行体の両側に動プーリを走査方向に２個ずつ配設し、
これら動プーリ間にベルトを掛け渡すと同時にそのベル
トの両端部を本体に固定し、さらに、動プーリの中間部
に位置するベルトに第１走行体をクランプし、第２走行
体をロープで駆動するようにしたものである。Further, as a third conventional example thereof, there is one disclosed in Japanese Patent Application Laid-Open No. 50-38529 under the title of "slit exposure device". This is because two moving pulleys are arranged in the scanning direction on both sides of the half traveling body,
At the same time as the belt is hung between these moving pulleys, both ends of the belt are fixed to the main body, and further, the first traveling body is clamped to the belt located in the middle portion of the moving pulley, and the second traveling body is driven by the rope. It is something that is done.
【０００５】[0005]
【発明が解決しようとする課題】従来、１：１／２の速
度でミラーを走査して原稿をスリット露光する走行体の
駆動には、以下に述べるような多くの問題点がある。例
えば、回転型モータとワイヤとにより駆動方式をとる構
成では、走査速度とモータの回転数との関係から減速機
構を必要とするため、その減速機構によるピッチ誤差
や、偏芯による回転ムラが生じる。しかも、このような
減速機構を省略したＤＣモータの場合においても、モー
タの安定した回転数の範囲から離れた無理な使い方とな
り、トルクも十分に得ることができなかった。ワイヤの
使用は、細い素線を数十本より合わせてあるため、伸び
が多く、取付け使用後の初期の伸びは調整により吸収す
ることができても長期間に渡る経時的な使用伸びはこれ
を吸収する機構が必須の構成となっている。Conventionally, there are many problems as described below in driving a traveling body that scans a mirror at a speed of 1: 1/2 to expose an original by slit exposure. For example, in a configuration that employs a drive system using a rotary motor and a wire, a speed reduction mechanism is required due to the relationship between the scanning speed and the number of rotations of the motor. Therefore, a pitch error due to the speed reduction mechanism or uneven rotation due to eccentricity occurs . Moreover, even in the case of a DC motor in which such a speed reduction mechanism is omitted, the motor cannot be used satisfactorily because it is out of the stable rotational speed range of the motor, and sufficient torque cannot be obtained. Since the use of wires is made up of dozens of thin wires, there is a lot of elongation, and the initial elongation after installation and use can be absorbed by adjustment, but the elongation over time for long-term use is The mechanism that absorbs is essential.
【０００６】また、ミラー等の光学系を搭載した第１、
第２走行体の軸受の構造は、ガイド軸に対してほぼ嵌合
に近い状態で支持されていて走行方向の自由度しか与え
られていない。第１、第２走行体共に第１のガイド軸に
各々２箇所の軸受部で支持され、合計４個の軸受が第１
のガイド軸に支持されている。他方の第２のガイド軸に
は、第１、第２走行体共に１個の軸受（場合によっては
２個の軸受）で支持するが、その第２のガイド軸の軸受
においては摺動や滑り軸受が多用され、自由度が大きな
ものとなる。In addition, the first, which is equipped with an optical system such as a mirror,
The structure of the bearing of the second traveling body is supported on the guide shaft in a state close to fitting, and only the degree of freedom in the traveling direction is given. Both the first and second traveling bodies are supported on the first guide shaft by two bearing portions each, and a total of four bearings are the first.
Is supported by the guide shaft. On the other second guide shaft, both the first and second traveling bodies are supported by one bearing (in some cases, two bearings), but the second guide shaft bearing slides or slides. Bearings are often used, and the degree of freedom is great.
【０００７】一般的には、第１のガイド軸受は２箇所の
軸受で、又、第２の軸受は１箇所の軸受で、すなわち、
３点支持となっているものが多い。このような３点支持
の形式では、２点支持側の軸と軸受のクリアランス（隙
間）による悪影響が１点支持側にできる。この対策とし
ては、２点支持側の支持間隔を大きくとるか、又は、１
点支持側に悪影響を除く手段を施す事が行われている。
さらに、１点支持を２点支持にし、第１の軸と軸受との
嵌合を止めて自由度の大きい軸受を採用し、４点で支持
することも行われている。この場合、走行体には第１の
軸側、第２の軸側の両方に駆動力を与える必要があり、
両側に１つの駆動源からワイヤをかけるため、プーリ等
の部品を多く要し、構造が複雑となり、ワイヤ長も長く
なり、伸びの発生を増大させる。Generally, the first guide bearing is a two-point bearing, and the second bearing is a one-point bearing, that is,
Many have three-point support. In such a three-point support type, the one-point support side can be adversely affected by the clearance (gap) between the shaft and the bearing on the two-point support side. As a countermeasure, increase the support interval on the two-point support side, or
Measures are taken to eliminate adverse effects on the point support side.
Further, one point support is changed to two point support, the fitting of the first shaft and the bearing is stopped, and a bearing having a large degree of freedom is adopted to support at four points. In this case, it is necessary to apply a driving force to the traveling body on both the first shaft side and the second shaft side,
Since the wire is hung from one driving source on both sides, many parts such as pulleys are required, the structure becomes complicated, the wire length becomes long, and the occurrence of elongation increases.
【０００８】前述した従来例のうち、第一の従来例の場
合はリニアモータの採用で減速機構による不都合点をな
くしてはいるがワイヤの影響を受けており、第二の従来
例の場合はワイヤの代わりに歯付きベルトを用いてお
り、ピッチ誤差、ベルトの伸びの影響が残る。第三の従
来例の場合は第２走行体の駆動にロープ（ワイヤと同
じ）を使用しており、ワイヤ使用による悪影響を受け
る。Of the above-mentioned conventional examples, the first conventional example employs a linear motor to eliminate the inconvenience caused by the reduction mechanism, but is affected by the wire, and the second conventional example A toothed belt is used instead of wires, and the effects of pitch error and belt elongation remain. In the case of the third conventional example, a rope (same as a wire) is used to drive the second traveling body, and this is adversely affected by the use of the wire.
【０００９】[0009]
【課題を解決するための手段】請求項１記載の発明で
は、原稿台上に置かれた原稿を第１走行体及びこの第１
走行体と１／２の速度比をもつ第２走行体を同一の走査
方向に走査させ、レンズを介して受光素子に投影結像さ
せることにより原稿画像を得る画像読取装置において、
前記第１及び第２走行体の一端側をこの一端側の２箇所
に形成された軸受を介して前記原稿台の走査方向に平行
に配置された第１ガイド軸に軸支し、前記第１及び第２
走行体の他端側をこの他端側の１箇所に形成された軸受
を介して前記第１ガイド軸に対してほぼ平行に配設され
た第２ガイド軸に軸支し、前記第２走行体の前記第１ガ
イド軸側に大間隔で２個の第１プーリを設け、本体に両
端が固定された第１ベルトを前記一対の第１プーリの外
周を半周するように掛け廻し、前記第１ベルトに前記第
１走行体の前記第１ガイド軸側をクランプし、前記第２
走行体の前記第２ガイド軸側に小間隔で２個の第２プー
リを設け、前記本体に両端が固定された第２ベルトを前
記一対の第２プーリの外周を半周するように掛け廻すと
共に前記本体に軸支されたターンプーリの外周を半周し
て折り返すように掛け廻し、前記第２ベルトに前記第１
走行体の前記第２ガイド軸側をクランプし、固定子が走
査方向に配置され可動子が前記第１又は第２走行体のい
ずれか一方に固定されたリニアモータを設けた。According to another aspect of the present invention, an original placed on an original table is placed on a first traveling body and the first traveling body.
In an image reading apparatus for obtaining a document image by scanning a second traveling body having a speed ratio of 1/2 of that of the traveling body in the same scanning direction and projecting an image on a light receiving element through a lens,
One end sides of the first and second traveling bodies are axially supported by a first guide shaft arranged parallel to the scanning direction of the document table via bearings formed at two positions on the one end side, And the second
The other end side of the traveling body is rotatably supported by a second guide shaft arranged substantially parallel to the first guide shaft via a bearing formed at one position on the other end side, and the second traveling is performed. Two first pulleys are provided at large intervals on the side of the first guide shaft of the body, and a first belt, both ends of which are fixed to the main body, is wound around the outer circumference of the pair of first pulleys so as to half-circulate. The first guide shaft side of the first traveling body is clamped to one belt,
Two second pulleys are provided at small intervals on the second guide shaft side of the traveling body, and a second belt, both ends of which are fixed to the main body, is wound around the outer circumference of the pair of second pulleys so as to half-circulate. The turn pulley pivotally supported by the main body is wound around the outer circumference of the turn pulley so that the turn pulley is folded around the turn pulley, and the first belt is attached to the second belt.
A linear motor is provided in which the second guide shaft side of the traveling body is clamped, the stator is arranged in the scanning direction, and the mover is fixed to either the first or second traveling body.
【００１０】請求項２記載の発明では、リニアモータの
固定子を、第１ガイド軸とレンズ及び受光素子からなる
レンズ光学系との間で走査方向に配設した。According to the second aspect of the invention, the stator of the linear motor is arranged in the scanning direction between the first guide shaft and the lens optical system including the lens and the light receiving element.
【００１１】[0011]
【作用】請求項１記載の発明においては、ベルトを第
１、第２走行体の両側に掛けた両側駆動となり、安定し
た走査を行うことが可能となる。According to the first aspect of the invention, the belt is driven on both sides of the first and second traveling bodies to drive both sides, and stable scanning can be performed.
【００１２】請求項２記載の発明においては、走行体軸
受の３点支持、すなわち、３点を結ぶ３角形の内部にリ
ニアモータの駆動力発生点を配置でき、しかも、走行方
向の２点軸受の近くであるために走行体の重心の近くを
駆動することになるため、極めてスムーズで安定した走
行を行わせることが可能となる。According to the second aspect of the invention, the driving force generating point of the linear motor can be arranged inside the three-point support of the traveling body bearing, that is, a triangle connecting the three points, and the two-point bearing in the traveling direction is provided. Since it is close to the vehicle, the vehicle is driven near the center of gravity of the traveling body, so that it is possible to perform extremely smooth and stable traveling.
【００１３】[0013]
【実施例】本発明の一実施例を図面に基づいて説明す
る。まず、画像読取装置の読取部の概略構成を図２に基
づいて述べる。原稿台としてのコンタクトガラス１上に
は原稿２が載置されており、この原稿２はその下部に位
置する光源３により照明された後、第１ミラー４、第２
ミラー５、第３ミラー６により順次反射され、レンズ７
により集光されて受光素子８（ＣＣＤセンサ）に投影結
像させることにより、画像を読取ることができる。この
場合、光源３と第１ミラー４とは第１走行体９を構成
し、第２ミラー５と第３ミラー６とは第２走行体１０を
構成している。そして、実際の読取り動作としては、第
１走行体９と第２走行体１０とを１：１／２の速度比で
走査方向Ｘ（副走査方向）に移動させることにより読取
りを行うことができる。なお、この走査読取り時に主走
査方向Ｙへも原稿２の全長（幅）に渡って読取りを行
う。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, the schematic configuration of the reading unit of the image reading apparatus will be described with reference to FIG. A manuscript 2 is placed on a contact glass 1 as a manuscript table, and the manuscript 2 is illuminated by a light source 3 located below the manuscript 2 and then a first mirror 4 and a second mirror 4 are provided.
The mirror 7 and the third mirror 6 are sequentially reflected to form a lens 7
The image can be read by being focused by and projected onto the light receiving element 8 (CCD sensor) to form an image. In this case, the light source 3 and the first mirror 4 compose the first traveling body 9, and the second mirror 5 and the third mirror 6 compose the second traveling body 10. As an actual reading operation, reading can be performed by moving the first traveling body 9 and the second traveling body 10 in the scanning direction X (sub-scanning direction) at a speed ratio of 1: 1/2. . Note that during this scanning reading, reading is also performed in the main scanning direction Y over the entire length (width) of the original 2.
【００１４】次に、本装置に係る走行体駆動装置の構成
を図１に基づいて説明する。本体１１の副走査方向Ｘに
平行な側面に沿って、第１ガイド軸１２及び第２ガイド
軸１３が配設されている。第１走行体９は、２個の軸受
１４ａ，１４ｂにより第１ガイド軸１２に嵌合され、他
方の側の軸受１４ｃは第２ガイド軸１３に接している。
また、第２走行体１０は、２個の軸受１５ａ，１５ｂに
より第１ガイド軸１２に嵌合され、他方の側の軸受１５
ｃは第２ガイド軸１３に接している。Next, the structure of the traveling body drive device according to this device will be described with reference to FIG. A first guide shaft 12 and a second guide shaft 13 are arranged along a side surface of the main body 11 parallel to the sub-scanning direction X. The first traveling body 9 is fitted to the first guide shaft 12 by two bearings 14a and 14b, and the bearing 14c on the other side is in contact with the second guide shaft 13.
Further, the second traveling body 10 is fitted to the first guide shaft 12 by the two bearings 15a and 15b, and the bearing 15 on the other side is fitted.
c is in contact with the second guide shaft 13.
【００１５】第２走行体１０の第１ガイド軸１２側に
は、大間隔で２個の第１プーリとしての第１動プーリ１
６ａ，１６ｂが設けられている。この第１動プーリ１６
ａ，１６ｂには第１ベルト１７が掛け廻されている。こ
の第１ベルト１７は、図３に示すように、第１動プーリ
１６ａ，１６ｂの外周を半周するように掛け廻され、そ
の両端部のベルトエンド１８により本体１１に固定され
ている。図３（ａ）は走査始発状態、図３（ｂ）は走査
終了状態を示すものである。On the side of the first guide shaft 12 of the second traveling body 10, the first moving pulley 1 serving as two first pulleys at large intervals.
6a and 16b are provided. This first moving pulley 16
A first belt 17 is wound around a and 16b. As shown in FIG. 3, the first belt 17 is wound around the outer circumferences of the first moving pulleys 16a and 16b so as to make a half turn, and is fixed to the main body 11 by belt ends 18 at both ends thereof. FIG. 3A shows the scanning start state, and FIG. 3B shows the scanning end state.
【００１６】第２走行体１０の第２ガイド軸１３側に
は、小間隔で２個の第２プーリとしての第２動プーリ１
９ａ，１９ｂが設けられている。この第２動プーリ１９
ａ，１９ｂには第２ベルト２０が掛け廻されている。こ
の第２ベルト２０は、図４に示すように、第２動プーリ
１９ａ，１９ｂの外周を半周するように掛け廻されると
共に、本体１１に軸支されたターンプーリ２１ａ，２１
ｂの外周を半周して折り返すようにして掛け廻されてい
る。また、第２ベルト２０は、その両端部のベルトエン
ド２２により本体１１に固定されている。図４（ａ）は
走査始発状態、図４（ｂ）は走査終了状態を示すもので
ある。On the side of the second guide shaft 13 of the second traveling body 10, the second moving pulley 1 as two second pulleys at small intervals.
9a and 19b are provided. This second moving pulley 19
A second belt 20 is wound around a and 19b. As shown in FIG. 4, the second belt 20 is wound around the outer circumferences of the second moving pulleys 19a and 19b so as to half-circulate, and the turn pulleys 21a and 21 are axially supported by the main body 11.
It hangs around the outer circumference of b so that it folds back halfway. Further, the second belt 20 is fixed to the main body 11 by belt ends 22 at both ends thereof. FIG. 4A shows the scanning start state, and FIG. 4B shows the scanning end state.
【００１７】第１ベルト１７は、第１走行体９の第１ガ
イド軸１２側の第１クランプ部２３ａにてクランプされ
ている。第２ベルト２０は、第１走行体９の第２ガイド
軸１３側の第２クランプ部２３ｂにてクランプされてい
る。The first belt 17 is clamped by a first clamp portion 23a on the first guide shaft 12 side of the first traveling body 9. The second belt 20 is clamped by the second clamp portion 23b of the first traveling body 9 on the second guide shaft 13 side.
【００１８】また、第２走行体１０の下面側には可動子
としてのコイル２４が取付けられている。このコイル２
４を磁束が貫通する形で本体１１の底面部には、固定子
としてのマグネット２５が副走査方向Ｘに沿って配設さ
れている。このようなコイル２４とマグネット２５と
で、リニアモータを構成している。この場合、マグネッ
ト２５は、第１ガイド軸１２と、レンズ７及び受光素子
８からなるレンズ光学系２６との間、すなわち３点を結
ぶ略３角形内に配置されている。A coil 24 as a mover is attached to the lower surface of the second traveling body 10. This coil 2
A magnet 25 as a stator is arranged along the sub-scanning direction X on the bottom surface of the main body 11 in such a manner that the magnetic flux penetrates through 4. Such a coil 24 and a magnet 25 constitute a linear motor. In this case, the magnet 25 is arranged between the first guide shaft 12 and the lens optical system 26 including the lens 7 and the light receiving element 8, that is, in a substantially triangular shape connecting three points.
【００１９】このような構成において、本装置の動作に
ついて述べる。今、第２走行体１０の下面に取付けられ
たコイル２４に通電すると、第２走行体１０は第１ガイ
ド軸１２に沿ってＸ方向に走行して行き、第１ベルト１
７と２個の第１動プーリ１６ａ，１６ｂとによりまた第
２ベルト２０と２個の第２動プーリ１９ａ，１９ｂとに
より動滑車の働きをして、第１走行体９をその両側から
第２走行体１０の２倍の速さでＸ方向に走行させる。The operation of this apparatus having such a structure will be described. When the coil 24 attached to the lower surface of the second traveling body 10 is energized, the second traveling body 10 travels along the first guide shaft 12 in the X direction, and the first belt 1
7 and the two first moving pulleys 16a and 16b, and the second belt 20 and the two second moving pulleys 19a and 19b act as a moving pulley to move the first traveling body 9 from both sides to 2 Travel in the X direction at twice the speed of the traveling body 10.
【００２０】上述したように、第１，第２ベルト１７，
２０を第１，第２走行体９，１０の両側に掛けた両側駆
動とすることにより、安定した走査を行うことができ
る。また、ここでは、主ガイド軸は第１ガイド軸１２の
１本であり、これに４つの軸受１４ａ，１４ｂ，１５
ａ，１５ｂを軸支し、従ガイド軸である第２ガイド軸１
３側の軸受１４ｃ，１５ｃを１個ずつで軸支することに
より３点支持となり、これにより必要十分な支持方式を
得ることができる。また、軸受個数及び間隔に応じた第
１，第２動プーリ１６ａ，１６ｂ，１９ａ，１９ｂの配
置と第１，第２ベルト１７，２０の掛け廻しにより、第
２走行体１０の構成の単純化と重量の低減化を図ること
ができる。さらに、従来のような歯付きベルトではなく
ベルト（厚み０．０２〜０．２ｍｍ、幅５〜１０ｍｍの
金属の平ベルト等）を用いたことにより、ピッチ誤差に
よる送りムラをなくすことができる。As described above, the first and second belts 17,
Stable scanning can be performed by driving 20 on both sides of the first and second traveling bodies 9 and 10 to drive both sides. Further, here, the main guide shaft is one of the first guide shafts 12, and the four bearings 14a, 14b, 15
The second guide shaft 1 which is a slave guide shaft and which supports a and 15b.
By supporting the bearings 14c and 15c on the three sides one by one, a three-point support is provided, and thus a necessary and sufficient support system can be obtained. In addition, the arrangement of the first and second dynamic pulleys 16a, 16b, 19a and 19b and the arrangement of the first and second belts 17 and 20 according to the number of bearings and the distance between the first and second belts 17 and 20 simplifies the configuration of the second traveling body 10. Therefore, the weight can be reduced. Further, by using a belt (a metal flat belt having a thickness of 0.02 to 0.2 mm and a width of 5 to 10 mm) instead of the conventional toothed belt, it is possible to eliminate uneven feeding due to a pitch error.
【００２１】また、第１，第２走行体９，１０の軸受１
４ａ〜１４ｃ，１５ａ〜１５ｃの３点支持、すなわち、
３点を結ぶ３角形の内部にリニアモータの駆動力発生点
を配置することができ、しかも、走行方向であるＸ軸方
向に対しては２点軸受の形をとっており、走行体の重心
の近くを駆動することになるため、これにより極めてス
ムーズで安定した走行を行うことができる。Further, the bearing 1 of the first and second traveling bodies 9 and 10
4a-14c, 15a-15c three-point support, that is,
The driving force generation point of the linear motor can be arranged inside the triangle connecting the three points, and in addition, it has the shape of a two-point bearing in the X-axis direction, which is the traveling direction, and the center of gravity of the traveling body. Since the vehicle is driven near the vehicle, it is possible to perform extremely smooth and stable traveling.
【００２２】さらに、リニアモータのこのような配置の
仕方は、軸と２軸受との遊びによる垂直軸（コンタクト
ガラス１面に垂直な軸）廻りの回転モーメントの影響を
受けにくく、原稿２の間欠読取り時に発生する走行体の
スタート＆ストップを行っても、原稿１の２重読取り、
或いは、読取り不足（欠落）を生じるようなことがな
く、常に安定した読取り動作を行うことができる。Further, the arrangement method of the linear motor is not easily affected by the rotational moment about the vertical axis (the axis perpendicular to the surface of the contact glass 1) due to the play between the shaft and the two bearings, and the intermittent operation of the original 2 is prevented. Even if you start and stop the traveling object that occurs during reading, double reading of the original 1
Alternatively, stable reading operation can always be performed without causing insufficient reading (missing).
【００２３】なお、本実施例では、第２走行体１０にコ
イル２４を設け、本体１１側のマグネット２５との間で
リニアモータを形成して第２走行体１０を駆動するよう
にしたが、この他に、コイル２４を第１走行体９の下部
に取付け、本体側のマグネット２５との間でリニアモー
タを形成するようにしてもよい。ただし、この場合、マ
グネット２５は、第１走行体９の走行範囲をカバーする
長さが必要となる。また、第２走行体１０は合計４個の
第１，第２動プーリ１６ａ，１６ｂ，１９ａ，１９ｂが
動滑車として働き、第１走行体９の１／２の速度でＸ方
向に走行するため、この場合におけるリニアモータの推
進力は第２走行体１０でリニアモータを形成する場合の
約１／２で済むことになる。また、第１ガイド軸１２に
嵌合する４個の軸受１４ａ，１４ｂ，１５ａ，１５ｂは
丸軸と丸穴とを組み合わせた摺動軸受の他に、転がり軸
受と加圧部材とを組み合わせたものでもよい。In this embodiment, the coil 24 is provided on the second traveling body 10 and the linear motor is formed between the coil 24 and the magnet 25 on the main body 11 side to drive the second traveling body 10. Alternatively, the coil 24 may be attached to the lower portion of the first traveling body 9 to form a linear motor with the magnet 25 on the main body side. However, in this case, the magnet 25 needs to have a length that covers the traveling range of the first traveling body 9. Further, in the second traveling body 10, the four first and second moving pulleys 16a, 16b, 19a, 19b in total function as moving pulleys and travel in the X direction at half the speed of the first traveling body 9. The propulsive force of the linear motor in this case is about half that in the case where the second traveling body 10 forms the linear motor. The four bearings 14a, 14b, 15a, 15b fitted to the first guide shaft 12 are a combination of a rolling bearing and a pressure member in addition to a sliding bearing in which a round shaft and a round hole are combined. But it's okay.
【００２４】[0024]
【発明の効果】請求項１記載の発明は、原稿台上に置か
れた原稿を第１走行体及びこの第１走行体と１／２の速
度比をもつ第２走行体を同一の走査方向に走査させ、レ
ンズを介して受光素子に投影結像させることにより原稿
画像を得る画像読取装置において、前記第１及び第２走
行体の一端側をこの一端側の２箇所に形成された軸受を
介して前記原稿台の走査方向に平行に配置された第１ガ
イド軸に軸支し、前記第１及び第２走行体の他端側をこ
の他端側の１箇所に形成された軸受を介して前記第１ガ
イド軸に対してほぼ平行に配設された第２ガイド軸に軸
支し、前記第２走行体の前記第１ガイド軸側に大間隔で
２個の第１プーリを設け、本体に両端が固定された第１
ベルトを前記一対の第１プーリの外周を半周するように
掛け廻し、前記第１ベルトに前記第１走行体の前記第１
ガイド軸側をクランプし、前記第２走行体の前記第２ガ
イド軸側に小間隔で２個の第２プーリを設け、前記本体
に両端が固定された第２ベルトを前記一対の第２プーリ
の外周を半周するように掛け廻すと共に前記本体に軸支
されたターンプーリの外周を半周して折り返すように掛
け廻し、前記第２ベルトに前記第１走行体の前記第２ガ
イド軸側をクランプし、固定子が走査方向に配置され可
動子が前記第１又は第２走行体のいずれか一方に固定さ
れたリニアモータを設けたので、ベルトを第１、第２走
行体の両側に掛けた両側駆動となり、安定した走査を行
うことができるものである。According to the first aspect of the present invention, a document placed on a document table is scanned in the same scanning direction with the first traveling body and the second traveling body having a speed ratio of 1/2 of that of the first traveling body. In an image reading apparatus that obtains a document image by scanning and scanning the image on a light receiving element through a lens, one end side of the first and second traveling bodies is provided with a bearing formed at two positions on the one end side. Via a bearing formed at one end on the other end side of the first and second traveling bodies and supported by a first guide shaft arranged parallel to the scanning direction of the document table. And is supported by a second guide shaft disposed substantially parallel to the first guide shaft, and two first pulleys are provided at large intervals on the first guide shaft side of the second traveling body, First with both ends fixed to the body
The belt is wound around the outer circumferences of the pair of first pulleys so as to half-circulate, and the first belt of the first traveling body is attached to the first belt.
The guide shaft side is clamped, two second pulleys are provided on the second guide shaft side of the second traveling body at small intervals, and a second belt whose both ends are fixed to the main body is connected to the pair of second pulleys. Around the outer periphery of the turn pulley half-circled around the outer periphery of the main body, and around the outer periphery of the turn pulley pivotally supported by the main body so as to fold back around, and clamp the second belt side of the first traveling body on the second belt. Since the linear motor in which the stator is arranged in the scanning direction and the mover is fixed to one of the first and second traveling bodies is provided, both sides of the belt are hung on both sides of the first and second traveling bodies. It is driven, and stable scanning can be performed.
【００２５】請求項２記載の発明は、リニアモータの固
定子は、第１ガイド軸とレンズ及び受光素子からなるレ
ンズ光学系との間で走査方向に配設したので、走行体軸
受の３点支持、すなわち、３点を結ぶ３角形の内部にリ
ニアモータの駆動力発生点を配置でき、しかも、走行方
向の２点軸受の近くであるために走行体の重心の近くを
駆動することになるため、極めてスムーズで安定した走
行を行わせることができるものである。According to the second aspect of the present invention, since the stator of the linear motor is arranged in the scanning direction between the first guide shaft and the lens optical system including the lens and the light receiving element, three points of the traveling body bearing are provided. The driving force generating point of the linear motor can be arranged inside the support, that is, the triangle connecting the three points, and since it is near the two-point bearing in the traveling direction, it drives near the center of gravity of the traveling body. Therefore, it is possible to perform extremely smooth and stable traveling.
【図１】本発明の一実施例である走行体駆動装置の構成
を示す平面図である。FIG. 1 is a plan view showing a configuration of a traveling body drive apparatus that is an embodiment of the present invention.
【図２】画像読取装置の読取部の構成を示す側面図であ
る。FIG. 2 is a side view showing a configuration of a reading unit of the image reading apparatus.
【図３】第１ベルトの動作前後の掛け廻し状態を示す状
態図である。FIG. 3 is a state diagram showing a wrapped state before and after the operation of the first belt.
【図４】第２ベルトの動作前後の掛け廻し状態を示す状
態図である。FIG. 4 is a state diagram showing a state in which the second belt is wound around before and after the operation.
１ 原稿台 ２ 原稿 ７ レンズ ８ 受光素子 ９ 第１走行体 １０ 第２走行体 １２ 第１ガイド軸 １３ 第２ガイド軸 １４ａ〜１５ｃ 軸受 １６ａ，１６ｂ 第１プーリ １７ 第１ベルト １９ａ，１９ｂ 第２プーリ ２０ 第２ベルト ２１ａ，２１ｂ ターンプーリ ２４ 可動子 ２５ 固定子 ２６ レンズ光学系 1 Manuscript table 2 manuscripts 7 lenses 8 Light receiving element 9 First running body 10 Second traveling body 12 First guide shaft 13 Second guide shaft 14a to 15c bearings 16a, 16b first pulley 17 First Belt 19a, 19b Second pulley 20 Second Belt 21a, 21b turn pulley 24 mover 25 stator 26 lens optical system
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−23435（ＪＰ，Ａ) 実開 昭56−161647（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03B 27/00 - 27/80 H04N 1/04 105 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-23435 (JP, A) Actual development 56-161647 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G03B 27/00-27/80 H04N 1/04 105
Claims (2)
びこの第１走行体と１／２の速度比をもつ第２走行体を
同一の走査方向に走査させ、レンズを介して受光素子に
投影結像させることにより原稿画像を得る画像読取装置
において、前記第１及び第２走行体の一端側をこの一端
側の２箇所に形成された軸受を介して前記原稿台の走査
方向に平行に配置された第１ガイド軸に軸支し、前記第
１及び第２走行体の他端側をこの他端側の１箇所に形成
された軸受を介して前記第１ガイド軸に対してほぼ平行
に配設された第２ガイド軸に軸支し、前記第２走行体の
前記第１ガイド軸側に大間隔で２個の第１プーリを設
け、本体に両端が固定された第１ベルトを前記一対の第
１プーリの外周を半周するように掛け廻し、前記第１ベ
ルトに前記第１走行体の前記第１ガイド軸側をクランプ
し、前記第２走行体の前記第２ガイド軸側に小間隔で２
個の第２プーリを設け、前記本体に両端が固定された第
２ベルトを前記一対の第２プーリの外周を半周するよう
に掛け廻すと共に前記本体に軸支されたターンプーリの
外周を半周して折り返すように掛け廻し、前記第２ベル
トに前記第１走行体の前記第２ガイド軸側をクランプ
し、固定子が走査方向に配置され可動子が前記第１又は
第２走行体のいずれか一方に固定されたリニアモータを
設けたことを特徴とする走行体駆動装置。1. A document placed on a document table is scanned in the same scanning direction by a first traveling body and a second traveling body having a speed ratio of 1/2 of that of the first traveling body, and is scanned through a lens. In an image reading apparatus for obtaining a document image by projecting and forming an image on a light receiving element, one end side of the first and second traveling bodies is scanned in a scanning direction of the document table via bearings formed at two locations on the one end side. Is axially supported by a first guide shaft arranged in parallel with the first guide shaft, and the other end sides of the first and second traveling bodies are supported with respect to the first guide shaft via a bearing formed at one position on the other end side. And a first guide shaft side of the second traveling body provided with two first pulleys at large intervals, and both ends of which are fixed to the main body. One belt is wound around the outer circumference of the pair of first pulleys so as to half-circulate, and the first traveling body is attached to the first belt. The first guide shaft side of the second traveling body is clamped to the second guide shaft side of the second traveling body at small intervals.
A plurality of second pulleys are provided, and a second belt, both ends of which are fixed to the main body, is wound around the outer circumferences of the pair of second pulleys so as to half-circulate, and the outer circumference of a turn pulley pivotally supported by the main body is half-circumscribed. The second belt is clamped around the second guide shaft side of the first traveling body, and the stator is arranged in the scanning direction, and the mover is one of the first traveling body and the second traveling body. A traveling body drive device comprising a linear motor fixed to the vehicle.
とレンズ及び受光素子からなるレンズ光学系との間で走
査方向に配設されたことを特徴とする請求項１記載の走
行体駆動装置。2. The traveling body drive according to claim 1, wherein the stator of the linear motor is arranged in the scanning direction between the first guide shaft and the lens optical system including the lens and the light receiving element. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18249192A JP3418205B2 (en) | 1992-07-09 | 1992-07-09 | Traveling body drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18249192A JP3418205B2 (en) | 1992-07-09 | 1992-07-09 | Traveling body drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0627540A JPH0627540A (en) | 1994-02-04 |
| JP3418205B2 true JP3418205B2 (en) | 2003-06-16 |
Family
ID=16119217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18249192A Expired - Fee Related JP3418205B2 (en) | 1992-07-09 | 1992-07-09 | Traveling body drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3418205B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779932A (en) * | 2019-11-12 | 2020-02-11 | 苏州悠扬智能科技有限公司 | Reciprocating motion formula cloth cover flaw visual inspection equipment |
-
1992
- 1992-07-09 JP JP18249192A patent/JP3418205B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627540A (en) | 1994-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3302746B2 (en) | Traveling body drive | |
| JP3077098B2 (en) | Image scanner device | |
| JP3418205B2 (en) | Traveling body drive | |
| JPH10257251A (en) | Layout structure of motor for driving carrier of image processing unit | |
| JP3793832B2 (en) | Inertial weight for rotating shaft | |
| JP3466373B2 (en) | Image reading device | |
| JP3292501B2 (en) | Document scanning optical device of image forming apparatus | |
| JPH0348576Y2 (en) | ||
| JPS62222272A (en) | Image forming device | |
| JP3583573B2 (en) | Image forming device | |
| JP2511648Y2 (en) | Moving body drive device | |
| JP2553215Y2 (en) | Exposure optics | |
| JPH01115755U (en) | ||
| JPS6029932B2 (en) | Optical system drive device | |
| JPH05191584A (en) | Picture reader | |
| KR200153789Y1 (en) | Scanning carrage transferring apparatus for image forming device | |
| JP4527313B2 (en) | Scanner device and copier | |
| JP3672181B2 (en) | Reading apparatus and image processing apparatus provided with the reading apparatus | |
| JPS59125720A (en) | Device for converting magnification of image of copying machine | |
| JP2004354431A (en) | Scanning optical system | |
| JPS62157459A (en) | Wire driver for optical running body | |
| JPH0630201A (en) | Image reader | |
| JP2001075191A (en) | Image reader and image forming device | |
| JPH0167647U (en) | ||
| JPH0287765A (en) | Manual picture reader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |