JP2511648Y2 - Moving body drive device - Google Patents
Moving body drive deviceInfo
- Publication number
- JP2511648Y2 JP2511648Y2 JP763390U JP763390U JP2511648Y2 JP 2511648 Y2 JP2511648 Y2 JP 2511648Y2 JP 763390 U JP763390 U JP 763390U JP 763390 U JP763390 U JP 763390U JP 2511648 Y2 JP2511648 Y2 JP 2511648Y2
- Authority
- JP
- Japan
- Prior art keywords
- moving body
- wire
- moving
- optical scanning
- center
- 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
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- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Transmission Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、移動体の駆動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a drive device for a moving body.
１つの移動体と、別の移動体とをそれぞれ2:1の速度
比で往復駆動する移動体の駆動装置は、例えば、画像形
成装置などに用いられている。A drive device for a moving body that reciprocally drives one moving body and another moving body at a speed ratio of 2: 1 is used, for example, in an image forming apparatus.
第２図は、その画像形成装置の一例である電子写真式
の複写機を示す。FIG. 2 shows an electrophotographic copying machine which is an example of the image forming apparatus.
図のコンタクトガラス１上には原稿２が載置され、こ
の原稿２は照明光源３により照明され、このときの反射
光像がミラー4,5,6、結像レンズ７、ミラー8,9,10のと
ころをそれぞれ通って感光体ドラム13の表面に結像投影
される。A document 2 is placed on the contact glass 1 shown in the figure, and the document 2 is illuminated by an illumination light source 3, and the reflected light image at this time is reflected by mirrors 4, 5, 6, imaging lenses 7, mirrors 8, 9, The image is projected on the surface of the photoconductor drum 13 through each of 10 positions.
照明光源３とミラー４とは光学走査体11内に、ミラー
5,6は光学走査体12内にそれぞれ組み込まれ、光学走査
体11と12とがそれぞれ2:1の速度比で矢印方向に駆動さ
れることにより、所謂、スリット露光走査が行われて、
感光体ドラム13上には原稿画像に対応した静電潜像が形
成される。The illumination light source 3 and the mirror 4 are provided in the optical scanning body 11 by a mirror.
5, 6 are respectively incorporated in the optical scanning body 12, by driving the optical scanning bodies 11 and 12 in the direction of the arrow at a speed ratio of 2: 1 respectively, so-called slit exposure scanning is performed,
An electrostatic latent image corresponding to the original image is formed on the photosensitive drum 13.
光学走査体11,12は、このようなスリット露光走査を
終了したのち、今までの方向とは反対方向に移動し、図
のホームポジションに戻る。光学走査体11,12は、この
ように、2:1の速度比をもって往復駆動されるのであ
る。After finishing the slit exposure scanning, the optical scanning bodies 11 and 12 move in the opposite direction to the previous direction and return to the home position in the figure. The optical scanning members 11 and 12 are thus reciprocally driven at a speed ratio of 2: 1.
第３図は、かような光学走査体の如き移動体の従来の
駆動装置を示し、符号15は駆動回転体の一例の駆動モー
タを示し、これは正逆回転可能なモータとなっている。
なお、駆動回転体には、かような駆動モータの他、別の
駆動モータからの伝達を受けて正逆回転する定滑車のよ
うな駆動回転体が用いられる場合もある。駆動回転体と
いうのはこのようなものも含む。FIG. 3 shows a conventional drive device for a moving body such as such an optical scanning body, and reference numeral 15 shows a drive motor as an example of a drive rotating body, which is a motor capable of forward and reverse rotation.
In addition to such a drive motor, a drive rotary body such as a constant pulley that rotates forward and backward in response to transmission from another drive motor may be used as the drive rotary body. The drive rotating body also includes such a thing.
仮に、これに駆動モータが用いられるものとして、こ
れのモータプーリ15Aには２本のワイヤ、すなわち実線
で示すワイヤ16と一点鎖線で示すワイヤ16aが巻き付け
られ、更に実線で示したワイヤ16は６個の定滑車17,17a
に巻き掛けられ、一点鎖線で示したワイヤ16aは４個の
定滑車17に巻き掛けられている。Assuming that a drive motor is used for this, two wires, that is, a wire 16 shown by a solid line and a wire 16a shown by a one-dot chain line are wound around the motor pulley 15A of this, and further six wires 16 shown by a solid line. The fixed pulley of 17,17a
The wire 16a, which is shown by the alternate long and short dash line, is wound around four fixed pulleys 17.
ここで、符号11で示す光学走査体を第１光学走査体と
称し、12で示す光学走査体を第２光学走査体と称するも
のとして、第１の光学走査体11の両側の底部は、クラン
パ18（第４図）を介して各ワイヤ16,16aに係止されてい
る。又、第２光学走査体12の両端部には動滑車19が回転
自在に軸装され、図示手前側の動滑車19には、矢印ａの
方向から来るワイヤ16が折り返えすようにして半周分巻
き掛けられ、そのワイヤ端部が固定端21に係止されてい
る。又、矢印ｂ方向から来るワイヤ16が動滑車19に折り
返えすようにして半周分巻き掛けられ、そのワイヤ端部
が引っ張りばね22を介して図示されない不動部材に係止
されている。同様にして奥側の動滑車19にも一点鎖線で
示すワイヤ16aが巻き掛けられている。Here, the optical scanning body 11 is referred to as a first optical scanning body and the optical scanning body 12 is referred to as a second optical scanning body, and the bottom portions on both sides of the first optical scanning body 11 are clampers. It is locked to each wire 16, 16a through 18 (Fig. 4). Further, movable pulleys 19 are rotatably mounted on both ends of the second optical scanning body 12, and the movable pulley 19 on the front side in the drawing has a wire 16 coming from the direction of an arrow a so that the wire 16 can be folded back halfway. The wire is wound by an amount, and its wire end is locked to the fixed end 21. Further, the wire 16 coming from the direction of the arrow b is wound around the moving pulley 19 by a half turn, and the end of the wire is locked by a tension spring 22 to a stationary member (not shown). Similarly, the moving pulley 19 on the back side is also wound with the wire 16a shown by the alternate long and short dash line.
駆動モータ15が回転すると、ワイヤ16,16aが引っ張ら
れて駆動されるのであるが、このとき、第１光学走査体
11は、そのワイヤ16,16aに直接係止され、第２光学走査
体12は、動滑車19を介してワイヤ16,16aに連結されてい
るため、第１及び第２光学走査体11,12はそれぞれ2:1の
速度比で矢印方向に移動する。When the drive motor 15 rotates, the wires 16 and 16a are pulled and driven. At this time, the first optical scanning member
11 is directly locked to the wires 16 and 16a, and the second optical scanning body 12 is connected to the wires 16 and 16a via the movable pulley 19, so that the first and second optical scanning bodies 11 and 12 are connected. Each move in the direction of the arrow at a speed ratio of 2: 1.
次いで、先に延べたようなスリット露光走査を終了し
たのち、モータ15が逆転して、第１及び第２光学走査体
11,12は、矢印と反対方向に移動して元のホームポジシ
ョンに戻る。すなわち、それらはモータ15の正逆回転に
より往復走査駆動されるのである。Then, after the slit exposure scanning as described above is completed, the motor 15 is rotated in the reverse direction to move the first and second optical scanning members.
11,12 move in the direction opposite to the arrow and return to their original home position. That is, they are reciprocally scanned and driven by the forward and reverse rotations of the motor 15.
光学走査体のような移動体を往復走行駆動する従来の
駆動装置においては、第４図に示すように光学走査体を
往復させるべくワイヤを矢印方向に引っ張って駆動する
場合、第１及び第２光学走査体11,12に対して、それぞ
れの重心G1,G2の回りに、M1,M2なるモーメントが付与さ
れてしまうため、光学走査体の如き移動体に振動が生じ
易くなる。例えば、かような駆動装置を複写機などの画
像形成装置で使用すると、露光走査時に、光学走査体が
振動してしまい、「画像ブレ」を生じたりして、複写画
像の画質が低下する。In a conventional drive device for reciprocating a moving body such as an optical scanning body, as shown in FIG. 4, when a wire is pulled in the arrow direction to drive the optical scanning body to reciprocate, the first and second driving systems are used. Since the moments M 1 and M 2 are applied to the optical scanning bodies 11 and 12 around the respective centers of gravity G 1 and G 2 , vibration easily occurs in a moving body such as the optical scanning body. For example, when such a driving device is used in an image forming apparatus such as a copying machine, the optical scanning body vibrates during exposure scanning, causing "image blurring", and the quality of the copied image deteriorates.
本考案の目的は、上述の如きモーメントを生じにくい
駆動装置として、移動体を円滑に走行駆動できるように
することにある。An object of the present invention is to make it possible to smoothly drive a moving body as a driving device that does not easily generate a moment as described above.
本考案は前述の目的を達成するため、正逆回転可能な
駆動回転体と、該駆動回転体及び複数の定滑車に巻き掛
けられるワイヤと、該ワイヤに係止される少なくとも１
つの移動体と、前記ワイヤを巻き掛けた動滑車を回転自
在に軸装した少なくとも１つの移動体とを有し、前記駆
動回転体の正逆回転により、ワイヤを介して前者と後者
の移動体をそれぞれ2:1の速度比で往復駆動するように
した移動体の駆動装置において、前者の移動体のワイヤ
に対する係止部分を、該移動体の重心を通る該移動体の
長手方向軸線上の位置に、動滑車の回転中心を、後者の
移動体の重心を通る該移動体の長手方向軸線上の位置に
それぞれ設定した構成を提案するものである。In order to achieve the above-mentioned object, the present invention achieves the above-described object, a drive rotating body that can rotate in the forward and reverse directions, a wire that is wound around the drive rotating body and a plurality of fixed pulleys, and at least 1
Two moving bodies and at least one moving body in which a movable pulley around which the wire is wound are rotatably mounted, and by the forward and reverse rotations of the drive rotating body, the former and the latter moving bodies are connected via the wire. In a drive unit for a moving body, which is configured to reciprocally drive at a speed ratio of 2: 1 respectively, a locking portion for a wire of the former moving body is provided on a longitudinal axis of the moving body that passes through the center of gravity of the moving body. It proposes a configuration in which the center of rotation of the moving pulley is set to a position on the longitudinal axis of the moving body that passes through the center of gravity of the latter moving body.
なお、移動体を複写機の光学走査体とすると、効果的
である。It is effective to use the moving body as an optical scanning body of a copying machine.
以下、本考案を一実施例に基づき説明する。 Hereinafter, the present invention will be described based on an embodiment.
第１図において、符号11,12は先にも述べたように移
動体の一例の光学走査体を示し、このうちの第１光学走
査体11の、ワイヤ16,16aに対する係止部分は、その光学
走査体の重心G1を通る当該走査体11の長手方向軸線L
1（第３図）上の位置に設定されている。すなわち、ワ
イヤ16,16aの上下方向の位置を、重心位置G1に合わせた
上、この重心G1を通る軸線L1上の位置で第１光学走査体
11を係止せしめるのである。In FIG. 1, reference numerals 11 and 12 indicate optical scanning bodies as an example of the moving body as described above, and the locking portions of the first optical scanning body 11 with respect to the wires 16 and 16a are The longitudinal axis L of the scanning body 11 passing through the center of gravity G 1 of the optical scanning body
It is set to the position above 1 (Fig. 3). That is, the vertical position of the wire 16, 16a, on matching the gravity center position G 1, the first optical scanning element at a position on the axis L 1 passing through the center of gravity G 1
11 is locked.
一方、第２光学走査体12の重心G2を通る当該走査体12
の長手方向軸線L2（第３図）上の位置に、動滑車19の回
転中心を合わせる。そして、又、重心G2を通る軸線L2と
ワイヤ16,16aまでの距離がｒであるものとして、動滑車
19を、かようなｒを半径とした滑車にする。On the other hand, the scanning body 12 passing through the center of gravity G 2 of the second optical scanning body 12
The rotation center of the movable pulley 19 is aligned with the position on the longitudinal axis L 2 (see FIG. 3) of the. Also, assuming that the distance between the axis L 2 passing through the center of gravity G 2 and the wires 16 and 16a is r, the moving pulley is
Let 19 be a pulley with such radius r.
他の構成は、第２図及び第３図を参照して先に説明し
た従来のものと変りはない。The other structure is the same as the conventional structure described above with reference to FIGS. 2 and 3.
第４図の従来例では、第１光学走査体11につき、この
重心G1の位置が、ワイヤ16から離れているために、ワイ
ヤ16を矢印方向に引っ張るとき、M1なるモーメントが生
じていたが、第１図の実施例では、重心G1とワイヤ16と
の間に、かかるモーメントを生ぜしめる距離が存在しな
いために、モーメントが生じる余地はない。In the conventional example of FIG. 4, since the position of the center of gravity G 1 of the first optical scanning body 11 is apart from the wire 16, a moment M 1 is generated when the wire 16 is pulled in the arrow direction. However, in the embodiment shown in FIG. 1 , since there is no distance between the center of gravity G 1 and the wire 16 that causes the moment, there is no room for the moment.
又、第４図の従来例では、動滑車19の移動力Ｆと、距
離Ｌ（重心G2と動滑車の回転中心との間の距離）とを乗
じたモーメントM2が生じていたが、本例では、その距離
Ｌがゼロになるために、かかるモーメントが生じ得な
い。Further, in the conventional example of FIG. 4, a moment M 2 generated by multiplying the moving force F of the moving pulley 19 and the distance L (distance between the center of gravity G 2 and the center of rotation of the moving pulley) is generated. In this example, since the distance L becomes zero, such a moment cannot occur.
更に、第１図に示すように、重心G2を通る軸線L2から
ワイヤ16,16aまでの距離がｒであるものとして、この距
離ｒを半径とする動滑車とすることで、上下方向の力が
それには付与されず、光学走査体の動きが一層円滑にな
る。Further, as shown in FIG. 1, assuming that the distance from the axis L 2 passing through the center of gravity G 2 to the wires 16 and 16a is r, a moving pulley having a radius of this distance r is used to move in the vertical direction. No force is applied to it and the movement of the optical scanning body becomes smoother.
かくの如くモーメントが生じなくなることで、各光学
走査体の走行時の振動が無くなるか、若しくは、大幅に
低減化され、それの走行が安定化する。特に、複写機な
どの場合は、「画像ブレ」などが無くなって、コピー画
質が一段と向上する。Since the moment is not generated as described above, the vibration of each optical scanning body during traveling is eliminated or greatly reduced, and the traveling thereof is stabilized. In particular, in the case of a copying machine or the like, "image blurring" is eliminated and the copy image quality is further improved.
なお、ワイヤ16,16aに直接係止される移動体や、動滑
車を介してワイヤに取り付けられる移動体としては、各
々につき、必ずしも１つではなく、２つ以上であっても
構わず、これらを円滑に走行駆動することができる。It should be noted that the number of moving bodies directly engaged with the wires 16 and 16a and the number of moving bodies attached to the wires via the moving pulleys are not necessarily one and may be two or more. Can be driven smoothly.
本考案の請求項１に記載の構成によれば、それぞれ異
なる速度で移動する各移動体に、振動などの原因となる
モーメントが加わらないため、それらを円滑に安定的に
走行駆動することができ、又、その安定化のための手段
を特別に設ける必要もない。According to the configuration of claim 1 of the present invention, moments that cause vibration or the like are not applied to the moving bodies that move at different speeds, so that they can be smoothly and stably driven. In addition, it is not necessary to provide any special means for stabilizing it.
請求項２に記載の構成によれば、振動の生じにくい状
態で、光学走査体を走行駆動することができるので、
「画像ブレ」などが発生しにくくなり、複写画像の画質
を一段と向上させることができる。According to the configuration of claim 2, since the optical scanning body can be driven to travel in a state where vibration is unlikely to occur,
"Image blurring" is less likely to occur and the image quality of the copied image can be further improved.
第１図は本考案一実施例の概略図、第２図は上記実施例
の一適用例である複写機の概略図、第３図はその複写機
に設けられる光学走査体の駆動装置の斜視図であって、
従来例と本考案実施例の説明に供した図、第４図は従来
例の問題点について説明するための光学走査部の構成図
である。 11,12……移動体としての光学走査体 15……駆動回転体としての駆動モータ 16,16a……ワイヤ 17……定滑車、19……動滑車 G1,G2……重心、L1,L2……軸線FIG. 1 is a schematic view of an embodiment of the present invention, FIG. 2 is a schematic view of a copying machine as an application example of the above embodiment, and FIG. 3 is a perspective view of a drive unit for an optical scanning body provided in the copying machine. Figure,
FIG. 4 is a diagram for explaining a conventional example and an embodiment of the present invention, and FIG. 4 is a configuration diagram of an optical scanning unit for explaining problems of the conventional example. 11,12 …… Optical scanning body as moving body 15 …… Drive motor as driving rotating body 16,16a …… Wire 17 …… Constant pulley, 19 …… Movable pulley G 1 , G 2 … Center of gravity, L 1 , L 2 …… Axis
Claims (2)
体及び複数の定滑車に巻き掛けられるワイヤと、該ワイ
ヤに係止される少なくとも１つの移動体と、前記ワイヤ
を巻き掛けた動滑車を回転自在に軸装した少なくとも１
つの移動体とを有し、前記駆動回転体の正逆回転によ
り、ワイヤを介して前者と後者の移動体をそれぞれ2:1
の速度比で往復駆動するようにした移動体の駆動装置に
おいて、前者の移動体のワイヤに対する係止部分を、該
移動体の重心を通る該移動体の長手方向軸線上の位置
に、動滑車の回転中心を、後者の移動体の重心を通る該
移動体の長手方向軸線上の位置にそれぞれ設定して成る
ようにした移動体の駆動装置。1. A drive rotor capable of rotating in the normal and reverse directions, a wire wound around the drive rotor and a plurality of constant pulleys, at least one moving body locked by the wire, and the wire wound around the wire. At least one rotatably mounted movable pulley
Two moving bodies, and by the forward and reverse rotation of the driving rotating body, the former moving body and the latter moving body are respectively moved by 2: 1 through a wire.
In a drive unit for a moving body which is reciprocally driven at a speed ratio of, the moving pulley is provided so that the locking portion of the former moving body with respect to the wire is located on the longitudinal axis of the moving body passing through the center of gravity of the moving body. The drive device for the moving body, wherein the rotation center of the moving body is set at a position on the longitudinal axis of the moving body that passes through the center of gravity of the latter moving body.
１に記載の移動体の駆動装置。2. The drive unit for a moving body according to claim 1, wherein the moving body is an optical scanning body of a copying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP763390U JP2511648Y2 (en) | 1990-01-30 | 1990-01-30 | Moving body drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP763390U JP2511648Y2 (en) | 1990-01-30 | 1990-01-30 | Moving body drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0398457U JPH0398457U (en) | 1991-10-14 |
| JP2511648Y2 true JP2511648Y2 (en) | 1996-09-25 |
Family
ID=31511288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP763390U Expired - Lifetime JP2511648Y2 (en) | 1990-01-30 | 1990-01-30 | Moving body drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511648Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6176521B2 (en) * | 2013-05-01 | 2017-08-09 | 株式会社リコー | Image reading apparatus and image forming apparatus |
-
1990
- 1990-01-30 JP JP763390U patent/JP2511648Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0398457U (en) | 1991-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |