JP2015118192A - Optical scanner and image forming apparatus - Google Patents

Optical scanner and image forming apparatus Download PDF

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JP2015118192A
JP2015118192A JP2013260692A JP2013260692A JP2015118192A JP 2015118192 A JP2015118192 A JP 2015118192A JP 2013260692 A JP2013260692 A JP 2013260692A JP 2013260692 A JP2013260692 A JP 2013260692A JP 2015118192 A JP2015118192 A JP 2015118192A
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cover member
holding member
optical scanning
scanning device
cleaning
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JP5961156B2 (en
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幸佑 内田
Yukihiro Uchida
幸佑 内田
大西　正人
Masato Onishi
正人 大西
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Kyocera Document Solutions Inc
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Kyocera Document Solutions Inc
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Abstract

PROBLEM TO BE SOLVED: To prevent increase in device size, while ensuring a guide function which prevents a holding member from floating.SOLUTION: An optical scanner 10 includes a housing 11 with a light emitting port 12, a tabular cover member 14 for closing the light emitting port 12, and a cleaning mechanism 20 for cleaning a surface of the cover member 14. The housing 11 has a recess 13 extending along a longitudinal direction of the light emitting port 12. The cover member 14 has a width direction end protruding to a recess 13. The cleaning mechanism 20 includes: a holding member 23 which moves in a longitudinal direction of the cover member 14; and a cleaning pad 22 held by the holding member 23 and coming into contact with the surface of the cover member 14. An end of the holding member 23 is folded, and is hooked on a rear face of the width direction end of the cover member 14 protruding to the recess 13.

Description

本発明は、光走査装置およびそれを備えた画像形成装置に関する。     The present invention relates to an optical scanning device and an image forming apparatus including the same.

複写機やプリンタ等の電子写真方式を採用する画像形成装置に設けられる光走査装置は、ポリゴンミラー等の光学部品が収容された筐体を有している。筐体には光の出射口が形成され、その出射口は塵埃等の異物が筐体内に侵入しないように透明なカバーガラス等のカバー部材によって閉塞されている。     An optical scanning device provided in an image forming apparatus that employs an electrophotographic system such as a copying machine or a printer has a housing that houses optical components such as a polygon mirror. A light exit port is formed in the housing, and the exit port is closed by a cover member such as a transparent cover glass so that foreign matter such as dust does not enter the housing.

ところで、カバーガラスの表面にトナー等による汚れや埃等が付着すると、光走査装置の光学性能が低下し、画像不良が生じてしまう。これを防止するために、例えば特許文献１に開示されるように、光走査装置にはカバーガラスの表面を定期的に清掃する清掃機構が設けられる。     By the way, if dirt or dust due to toner or the like adheres to the surface of the cover glass, the optical performance of the optical scanning device deteriorates and an image defect occurs. In order to prevent this, as disclosed in Patent Document 1, for example, the optical scanning device is provided with a cleaning mechanism for periodically cleaning the surface of the cover glass.

特許文献１に開示されている清掃機構は、、カバーガラスに沿って往復動する保持部材と、保持部材に保持されてカバーガラスの表面に密着する清掃部材とを有する。この清掃機構では、清掃部材が保持部材と共にカバーガラスに沿って往復動することによって、カバーガラスの表面が清掃される。     The cleaning mechanism disclosed in Patent Document 1 includes a holding member that reciprocates along the cover glass, and a cleaning member that is held by the holding member and adheres closely to the surface of the cover glass. In this cleaning mechanism, the surface of the cover glass is cleaned by the cleaning member reciprocating along the cover glass together with the holding member.

特開２００９−１４３１０８号公報JP 2009-143108 A

ところで、特許文献１の清掃機構では、保持部材の浮き上がりを防止するガイド機構が設けられている。ガイド機構は、筐体におけるカバーガラスの側方部分が突出してカバーガラスに沿って延びるガイドレールを形成し、保持部材の端部が鉤状に折り曲げられてガイドレールに掛けられている。つまり、保持部材の端部はガイドレールを抱え込んでいる。     Incidentally, the cleaning mechanism of Patent Document 1 is provided with a guide mechanism that prevents the holding member from being lifted. In the guide mechanism, a side portion of the cover glass in the housing protrudes to form a guide rail extending along the cover glass, and an end portion of the holding member is bent in a hook shape and hung on the guide rail. That is, the end of the holding member holds the guide rail.

しかしながら、上述したガイド機構では、筐体の一部が突出してガイドレールを形成しているため、保持部材の設置高さが高くなる。そのため、光走査装置が大型化してしまい、画像形成装置において光走査装置の設置スペースを確保するのが困難になるという問題があった。     However, in the above-described guide mechanism, a part of the housing protrudes to form a guide rail, so that the installation height of the holding member is increased. Therefore, there is a problem that the optical scanning device is enlarged and it is difficult to secure a space for installing the optical scanning device in the image forming apparatus.

本発明は、かかる点に鑑みてなされたものであり、その目的は、清掃機構における保持部材の浮き上がりを防止するガイド機能を確保しつつ、大型化を抑制し得る光走査装置を提供することにある。     The present invention has been made in view of this point, and an object of the present invention is to provide an optical scanning device capable of suppressing an increase in size while ensuring a guide function for preventing a holding member from lifting up in a cleaning mechanism. is there.

本発明に係る光走査装置は、光の出射口が矩形に形成された筐体と、上記出射口を閉塞する透明な板状のカバー部材と、該カバー部材の表面を清掃する清掃機構とを備えている。上記筐体には、上記出射口の長手方向に沿って延びる凹部が形成されている。上記カバー部材は、幅方向端部が上記凹部に張り出す大きさに形成されている。上記清掃機構は、上記筐体の外部に設けられて上記カバー部材の長手方向に移動する保持部材と、該保持部材に保持されて上記カバー部材の表面に接する清掃パッドとを有し、上記保持部材の端部は折り曲げられて上記カバー部材の上記凹部に張り出した幅方向端部の裏面に引っ掛けられている。     An optical scanning device according to the present invention includes a housing in which a light emission port is formed in a rectangular shape, a transparent plate-like cover member that closes the light emission port, and a cleaning mechanism that cleans the surface of the cover member. I have. The casing is formed with a recess extending along the longitudinal direction of the emission port. The cover member is formed in such a size that an end in the width direction protrudes from the recess. The cleaning mechanism includes a holding member that is provided outside the housing and moves in the longitudinal direction of the cover member, and a cleaning pad that is held by the holding member and contacts the surface of the cover member. The end portion of the member is bent and hooked on the back surface of the end portion in the width direction that protrudes from the concave portion of the cover member.

本発明に係る画像形成装置は、上記の光走査装置を備えている。     An image forming apparatus according to the present invention includes the above optical scanning device.

本発明によれば、清掃機構における保持部材の浮き上がりを防止しつつ、大型化を抑制し得る光走査装置を提供することができる。     ADVANTAGE OF THE INVENTION According to this invention, the optical scanning device which can suppress an enlargement can be provided, preventing the raising of the holding member in a cleaning mechanism.

図１は、画像形成装置の概略構成を示すブロック図である。FIG. 1 is a block diagram illustrating a schematic configuration of the image forming apparatus. 図２は、光走査装置の概略構成を示す断面図である。FIG. 2 is a cross-sectional view illustrating a schematic configuration of the optical scanning device. 図３は、清掃機構の概略構成を示す平面図である。FIG. 3 is a plan view showing a schematic configuration of the cleaning mechanism. 図４は、清掃機構の要部を示す断面図である。FIG. 4 is a cross-sectional view showing a main part of the cleaning mechanism.

以下、本発明の実施形態を図面に基づいて詳細に説明する。尚、本発明は、以下の実施形態に限定されるものではない。     Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.

本実施形態の画像形成装置１は、例えばレーザプリンタや複合機であり、用紙を搬送しながら、端末等（図示省略）から送信される画像データに基づいて用紙に画像を形成するように構成されている。図１に示すように、画像形成装置１は、給紙部２と、画像形成部３と、定着部４と、排紙部５とを備えている。     The image forming apparatus 1 according to the present embodiment is, for example, a laser printer or a multifunction peripheral, and is configured to form an image on a sheet based on image data transmitted from a terminal or the like (not shown) while conveying the sheet. ing. As shown in FIG. 1, the image forming apparatus 1 includes a paper feed unit 2, an image forming unit 3, a fixing unit 4, and a paper discharge unit 5.

給紙部２は、用紙を画像形成部３へ供給するカセット給紙部や手差しトレイである。画像形成部３は、図示しないが、感光ドラムや、その感光ドラムの周囲に配置された帯電器、現像器、転写ローラなどを備えている。また、画像形成部３は、感光ドラムにレーザ光を出射して静電潜像を形成する光走査装置１０を備えている。画像形成部３では、給紙部２から供給された用紙にトナー像を転写するようになっている。定着部４は、図示しないが、互いに圧接されて回転する定着ローラおよび加圧ローラを備えている。定着部４は、画像形成部３で用紙に転写された画像（トナー像）をその用紙に定着させるように構成されている。排紙部５は、定着部４から画像形成された用紙が供給される排紙トレイ（図示省略）を有している。
〈光走査装置〉 The paper feed unit 2 is a cassette paper feed unit or a manual feed tray that supplies paper to the image forming unit 3. Although not shown, the image forming unit 3 includes a photosensitive drum and a charger, a developing device, a transfer roller, and the like disposed around the photosensitive drum. In addition, the image forming unit 3 includes an optical scanning device 10 that emits laser light to a photosensitive drum to form an electrostatic latent image. In the image forming unit 3, the toner image is transferred to the paper supplied from the paper feeding unit 2. Although not shown, the fixing unit 4 includes a fixing roller and a pressure roller that are pressed against each other and rotate. The fixing unit 4 is configured to fix the image (toner image) transferred to the sheet by the image forming unit 3 on the sheet. The paper discharge unit 5 has a paper discharge tray (not shown) to which the paper on which the image is formed is supplied from the fixing unit 4.
<Optical scanning device>

図２に示すように、光走査装置１０は、扁平な箱状部材によって構成された筐体１１を備えている。筐体１１は、例えばガラス繊維により強度が高められた樹脂材料によって形成されている。     As shown in FIG. 2, the optical scanning device 10 includes a housing 11 configured by a flat box-shaped member. The housing 11 is formed of a resin material whose strength is increased by, for example, glass fiber.

筐体１１には、レーザ光を照射する光源体（図示省略）や光走査部品が収容されている。光走査部品は、ポリゴンミラー１５や複数のミラー１６などである。     The housing 11 accommodates a light source body (not shown) that emits laser light and an optical scanning component. The optical scanning component is a polygon mirror 15 or a plurality of mirrors 16.

筐体１１の上面には、光の出射口１２が形成されている。本実施形態では、出射口１２が４つ形成されており、それぞれが副走査方向（図２において左右方向）に並んでいる。出射口１２は、主走査方向（図２において紙面に対して鉛直方向）に延びる矩形に形成されている。出射口１２は、光源体から照射されてポリゴンミラー１５やミラー１６等の光走査部品を介したレーザ光が画像形成部３の感光ドラムへ出射される。     A light exit 12 is formed on the top surface of the housing 11. In the present embodiment, four emission ports 12 are formed, and each is arranged in the sub-scanning direction (left-right direction in FIG. 2). The emission port 12 is formed in a rectangular shape extending in the main scanning direction (perpendicular to the paper surface in FIG. 2). The exit 12 is irradiated from the light source body, and laser light is emitted to the photosensitive drum of the image forming unit 3 through optical scanning components such as the polygon mirror 15 and the mirror 16.

筐体１１には、出射口１２を閉塞するカバー部材１４が設けられている。カバー部材１４は、主走査方向に延びる矩形の板状に形成された透明なガラスである。つまり、出射口１２ではレーザ光がカバー部材１４を透過する。カバー部材１４は、筐体１１の内部に塵埃等が侵入するのを防止する防塵ガラスを構成している。     The housing 11 is provided with a cover member 14 that closes the emission port 12. The cover member 14 is a transparent glass formed in a rectangular plate shape extending in the main scanning direction. That is, the laser beam passes through the cover member 14 at the emission port 12. The cover member 14 constitutes a dust-proof glass that prevents dust and the like from entering the inside of the housing 11.

図３および図４にも示すように、光走査装置１０は、カバー部材１４の表面を清掃する清掃機構２０を備えている。清掃機構２０は、各カバー部材１４の表面を清掃する４つの清掃部２１と、清掃部２１を駆動するためのワイヤリール２５、ワイヤ２６およびガイドローラ２７とを有している。     As shown in FIGS. 3 and 4, the optical scanning device 10 includes a cleaning mechanism 20 that cleans the surface of the cover member 14. The cleaning mechanism 20 includes four cleaning units 21 that clean the surface of each cover member 14, and a wire reel 25, a wire 26, and a guide roller 27 for driving the cleaning unit 21.

図４に示すように、清掃部２１は、保持部材２３と清掃パッド２２を有している。保持部材２３は、筐体１１の外部に設けられた略棒状の部材である。清掃パッド２２は、略矩形体に形成されており、保持部材２３に保持されてカバー部材１４の表面に接している。     As shown in FIG. 4, the cleaning unit 21 includes a holding member 23 and a cleaning pad 22. The holding member 23 is a substantially bar-shaped member provided outside the housing 11. The cleaning pad 22 is formed in a substantially rectangular body, is held by the holding member 23 and is in contact with the surface of the cover member 14.

ワイヤリール２５、ワイヤ２６およびガイドローラ２７は、清掃部２１をカバー部材１４の長手方向（即ち、主走査方向）に往復動（移動）させる駆動機構である。図３に示すように、ワイヤリール２５は、最外に位置するカバー部材１４の近傍に２つ設けられている。ワイヤ２６は、両端が２つのワイヤリール２５に接続され、途中は複数（本実施形態では、６つ）のガイドローラ２７によって引き回されている。６つのガイドローラ２７は、各カバー部材１４の長手方向の端部近傍に設けられている。ガイドローラ２７は、ワイヤ２６が各カバー部材１４の長手方向に沿って延びるようにワイヤ２６を引き回している。そして、ワイヤ２６は保持部材２３の端部に形成された貫通孔２３ｂに挿通固定されている。この駆動機構では、一方のワイヤリール２５が巻き取り動作を行い、他方のワイヤリール２５が送り出し動作を行うことでワイヤ２６が走行し、そのワイヤ２６の走行に伴って清掃部２１がカバー部材１４の長手方向に往復動（移動）する。この清掃部２１の移動により、カバー部材１４の表面が清掃パッド２２で清掃される。なお、ワイヤリール２５は本発明に係るワイヤ駆動部を構成している。     The wire reel 25, the wire 26, and the guide roller 27 are drive mechanisms that reciprocate (move) the cleaning unit 21 in the longitudinal direction of the cover member 14 (that is, the main scanning direction). As shown in FIG. 3, two wire reels 25 are provided in the vicinity of the outermost cover member 14. Both ends of the wire 26 are connected to two wire reels 25, and are routed around by a plurality of (six in this embodiment) guide rollers 27 in the middle. The six guide rollers 27 are provided in the vicinity of the end of each cover member 14 in the longitudinal direction. The guide roller 27 routes the wire 26 so that the wire 26 extends along the longitudinal direction of each cover member 14. The wire 26 is inserted and fixed in a through hole 23 b formed at the end of the holding member 23. In this drive mechanism, one wire reel 25 performs a winding operation, and the other wire reel 25 performs a feeding operation so that the wire 26 travels. As the wire 26 travels, the cleaning unit 21 moves the cover member 14. Reciprocates (moves) in the longitudinal direction. By the movement of the cleaning unit 21, the surface of the cover member 14 is cleaned with the cleaning pad 22. The wire reel 25 constitutes a wire drive unit according to the present invention.

図２および図４に示すように、筐体１１には、各出射口１２の長手方向に沿って延びる凹部１３が形成されている。凹部１３は、出射口１２の側方において出射口１２の開口位置よりも凹んだ形状になっている。カバー部材１４は、その幅方向端部（図４において右側端部）が凹部１３に張り出す大きさに形成されている。また、このカバー部材１４の幅方向端部はカバー部材１４の長手方向に亘って張り出している。     As shown in FIGS. 2 and 4, the housing 11 is formed with a recess 13 extending along the longitudinal direction of each emission port 12. The recess 13 has a shape that is recessed from the opening position of the exit port 12 on the side of the exit port 12. The cover member 14 is formed in such a size that an end portion in the width direction (right end portion in FIG. 4) projects into the recess 13. Further, the end of the cover member 14 in the width direction extends over the longitudinal direction of the cover member 14.

清掃部２１の保持部材２３は、その端部が鉤状に折り曲げられてガイド部２３ａを形成している。保持部材２３のガイド部２３ａは、カバー部材１４の凹部１３に張り出した幅方向端部の裏面に引っ掛けられている。つまり、保持部材２３のガイド部２３ａは、凹部１３においてカバー部材１４の張り出し部の裏側に潜り込んでその裏面に接触している。保持部材２３は、ガイド部２３ａがカバー部材１４に引っ掛けられた状態でカバー部材１４の長手方向に移動する。     The holding member 23 of the cleaning part 21 has its end bent into a hook shape to form a guide part 23a. The guide portion 23 a of the holding member 23 is hooked on the back surface of the end portion in the width direction that protrudes from the concave portion 13 of the cover member 14. That is, the guide portion 23 a of the holding member 23 enters the back side of the protruding portion of the cover member 14 in the recess 13 and is in contact with the back surface thereof. The holding member 23 moves in the longitudinal direction of the cover member 14 in a state where the guide portion 23 a is hooked on the cover member 14.

保持部材２３のガイド部２３ａが上述したようにカバー部材１４に引っ掛けられることにより、保持部材２３の上方（即ち、保持部材２３がカバー部材１４から離隔する方向）に変位する動作が規制される。そのため、清掃パッド２２の浮き上がりを防止することができる。そして、保持部材２３のガイド部２３ａは出射口１２の開口位置よりも低い凹部１３に収容されるため、ガイド部２３ａの設置スペースを低減することができる。その結果、清掃機構２０引いては光走査装置１０の小型化を図ることが可能である。     When the guide portion 23a of the holding member 23 is hooked on the cover member 14 as described above, an operation of displacing the holding member 23 upward (that is, the direction in which the holding member 23 is separated from the cover member 14) is restricted. Therefore, the cleaning pad 22 can be prevented from rising. And since the guide part 23a of the holding member 23 is accommodated in the recessed part 13 lower than the opening position of the output port 12, the installation space of the guide part 23a can be reduced. As a result, it is possible to reduce the size of the optical scanning device 10 by pulling the cleaning mechanism 20.

さらに、本実施形態の清掃機構２０では、保持部材２３の端部にワイヤ２６を挿通固定しワイヤ２６を走行させることによって保持部材２３および清掃パッド２２を移動させるため、例えば保持部材の端部にスクリュー軸を挿通してスクリュー軸を回転駆動することによって保持部材を移動させる構成に比べて、清掃機構２０を小型にすることができる。よって、光走査装置１０をより小型にすることができる。     Furthermore, in the cleaning mechanism 20 of the present embodiment, the wire 26 is inserted and fixed to the end of the holding member 23 and the wire 26 is moved to move the holding member 23 and the cleaning pad 22. For example, at the end of the holding member The cleaning mechanism 20 can be made smaller than the configuration in which the holding member is moved by inserting the screw shaft and rotationally driving the screw shaft. Therefore, the optical scanning device 10 can be made smaller.

以上のように光走査装置１０の小型化を図れることから、画像形成装置１において光走査装置１０の設置自由度が高まると共に、画像形成装置１の小型化をも図ることができる。     Since the optical scanning device 10 can be reduced in size as described above, the degree of freedom in installing the optical scanning device 10 in the image forming apparatus 1 is increased, and the image forming apparatus 1 can be reduced in size.

以上説明したように、本発明は、例えば複写機やプリンタ等の画像形成装置に用いられる光走査装置およびそれを備えた画像形成装置について有用である。     As described above, the present invention is useful for an optical scanning device used in an image forming apparatus such as a copying machine or a printer, and an image forming apparatus including the same.

１ 画像形成装置
１０ 光走査装置
１１ 筐体
１２ 出射口
１３ 凹部
１４ カバー部材
２０ 清掃機構
２２ 清掃パッド
２３ 保持部材
２３ａ ガイド部（端部）
２５ ワイヤリール（ワイヤ駆動部）
２６ ワイヤ
DESCRIPTION OF SYMBOLS 1 Image forming apparatus 10 Optical scanning device 11 Housing | casing 12 Output port 13 Recessed part 14 Cover member 20 Cleaning mechanism 22 Cleaning pad 23 Holding member 23a Guide part (end part)
25 Wire reel (wire drive unit)
26 wires

Claims (3)

光の出射口が矩形に形成された筐体と、上記出射口を閉塞する透明な板状のカバー部材と、該カバー部材の表面を清掃する清掃機構とを備え、
上記筐体には、上記出射口の長手方向に沿って延びる凹部が形成され、
上記カバー部材は、幅方向端部が上記凹部に張り出す大きさに形成され、
上記清掃機構は、上記筐体の外部に設けられて上記カバー部材の長手方向に移動する保持部材と、該保持部材に保持されて上記カバー部材の表面に接する清掃パッドとを有し、上記保持部材の端部は折り曲げられて上記カバー部材の上記凹部に張り出した幅方向端部の裏面に引っ掛けられている、光走査装置。 A housing in which a light exit port is formed in a rectangle; a transparent plate-like cover member that closes the exit port; and a cleaning mechanism that cleans the surface of the cover member.
The casing is formed with a recess extending along the longitudinal direction of the exit port,
The cover member is formed in such a size that an end in the width direction protrudes into the recess,
The cleaning mechanism includes a holding member that is provided outside the housing and moves in the longitudinal direction of the cover member, and a cleaning pad that is held by the holding member and contacts the surface of the cover member. An optical scanning device, wherein an end portion of the member is bent and hooked on a back surface of an end portion in the width direction protruding from the concave portion of the cover member. 請求項１に記載の光走査装置において、
上記清掃機構は、上記保持部材の折り曲げられた端部とは反対側の端部に固定されたワイヤと、該ワイヤを上記カバー部材の長手方向に走行させるワイヤ駆動部とを有する、光走査装置。 The optical scanning device according to claim 1,
The cleaning mechanism includes an optical scanning device having a wire fixed to an end opposite to a bent end of the holding member, and a wire driving unit that causes the wire to travel in the longitudinal direction of the cover member. . 請求項１または２に記載の光走査装置を備えている、画像形成装置。
An image forming apparatus comprising the optical scanning device according to claim 1.
JP2013260692A 2013-12-17 2013-12-17 Optical scanning apparatus and image forming apparatus Active JP5961156B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622045U (en) * 1985-06-19 1987-01-08
JP2005041017A (en) * 2003-07-24 2005-02-17 Kyocera Mita Corp Output window cleaning device for exposure unit and image forming device equipped therewith
JP2010091690A (en) * 2008-10-07 2010-04-22 Kyocera Mita Corp Automatic cleaning mechanism, optical scanner equipped with the same and image forming apparatus
JP2012042494A (en) * 2010-08-12 2012-03-01 Fuji Xerox Co Ltd Optical scanner and image forming apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622045U (en) * 1985-06-19 1987-01-08
JP2005041017A (en) * 2003-07-24 2005-02-17 Kyocera Mita Corp Output window cleaning device for exposure unit and image forming device equipped therewith
JP2010091690A (en) * 2008-10-07 2010-04-22 Kyocera Mita Corp Automatic cleaning mechanism, optical scanner equipped with the same and image forming apparatus
JP2012042494A (en) * 2010-08-12 2012-03-01 Fuji Xerox Co Ltd Optical scanner and image forming apparatus

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