JP2005173455A - Image forming device - Google Patents

Image forming device Download PDF

Info

Publication number
JP2005173455A
JP2005173455A JP2003416461A JP2003416461A JP2005173455A JP 2005173455 A JP2005173455 A JP 2005173455A JP 2003416461 A JP2003416461 A JP 2003416461A JP 2003416461 A JP2003416461 A JP 2003416461A JP 2005173455 A JP2005173455 A JP 2005173455A
Authority
JP
Japan
Prior art keywords
support member
image forming
forming apparatus
image
cylindrical frame
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
JP2003416461A
Other languages
Japanese (ja)
Inventor
Hideki Takatsuka
英樹 高塚
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2003416461A priority Critical patent/JP2005173455A/en
Publication of JP2005173455A publication Critical patent/JP2005173455A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device that can secure torsional rigidity of a body frame, and of maintaining torsional rigidity, even when the replacement or the maintenance of built-in parts, such as an exposure means, and has a body frame structure of simple composition with a small number of components. <P>SOLUTION: The image forming device that executes exposure on a photo conducting drum which is turned by a laser scanner device, forms a latent image, develops the latent image and forms an image by the device comprising right and left side panels 30 and 31 that support both sides of the photoconducting drum to the direction of the rotational axis; and a tubular frame that joins the right and the left side panels 30 and 31, formed into a tubular form by support members 32, 33 and 34 that support the side panels. The tubular frame has a notch part 33a, and the laser scanner device 20 is disposed, with at least one part of it entering the inside of the tubular frame from the notch part 33a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、電子写真方式を採用する複写機やレーザービームプリンタ等の画像形成装置に関し、特に精度および剛性が必要とされる装置本体の支持構造に関するものである。   The present invention relates to an image forming apparatus such as a copying machine or a laser beam printer that employs an electrophotographic system, and more particularly to a support structure for an apparatus main body that requires accuracy and rigidity.

図6に、従来の画像形成装置を示す。各色の感光体ドラム101K,101M,101Y,101C、はレーザースキャナ装置102によって静電潜像を形成され、図示しない現像手段によって各色トナー像が担持される。給送カセット103から給送ローラ104によって送り出された転写材105は、転写搬送ベルト106によって搬送されながら感光体ドラム101K,101M,101Y,101Cから各色のトナー像を転写され、定着装置107によって熱と圧力を加えられることによりトナー像が転写材105に溶融固着され、画像として排出トレイ108に排出、積載される。(例えば、特許文献1)。   FIG. 6 shows a conventional image forming apparatus. The photosensitive drums 101K, 101M, 101Y, and 101C for the respective colors form electrostatic latent images by the laser scanner device 102, and the respective color toner images are carried by developing means (not shown). The transfer material 105 fed from the feeding cassette 103 by the feeding roller 104 is transferred with the toner images of the respective colors from the photosensitive drums 101K, 101M, 101Y, and 101C while being conveyed by the transfer conveying belt 106, and is heated by the fixing device 107. When the pressure is applied, the toner image is melted and fixed to the transfer material 105, and is discharged and stacked on the discharge tray 108 as an image. (For example, patent document 1).

感光体ドラム101K,101M,101Y,101Cを内包するプロセスカートリッジ109K,109M,109Y,109Cは、転写搬送ベルト装置106を回動支点111を中心に矢印A方向に回動することにより本体前面(図中右側)に開口部を作ることで着脱することができ、交換を行うことができる。   The process cartridges 109K, 109M, 109Y, and 109C containing the photosensitive drums 101K, 101M, 101Y, and 101C rotate the transfer / conveyance belt device 106 about the rotation fulcrum 111 in the direction of arrow A (see FIG. It can be attached and detached by making an opening in the middle right) and can be exchanged.

プロセスカートリッジ109K,109M,109Y,109Cは、図7に示すように、その長手方向両端近傍を左側板112と右側板113とで支持されている。レーザースキャナ装置102は支持部材114によって支持されている。支持部材114は左側板112と右側板113とにビスで結合され、さらに左側板112および右側板113に結合された支持部材115,116などにより本体フレーム構造を形成している。本体フレーム構造は、各色の感光体ドラム101K,101M,101Y,101Cとレーザースキャナ装置102とが所定の位置関係になるように、組み立て冶具などによって保持されながら組み立てられる。   As shown in FIG. 7, the process cartridges 109K, 109M, 109Y, and 109C are supported by the left side plate 112 and the right side plate 113 in the vicinity of both ends in the longitudinal direction. The laser scanner device 102 is supported by a support member 114. The support member 114 is coupled to the left side plate 112 and the right side plate 113 with screws, and further the support members 115 and 116 coupled to the left side plate 112 and the right side plate 113 form a main body frame structure. The main body frame structure is assembled while being held by an assembly jig or the like so that the photosensitive drums 101K, 101M, 101Y, and 101C for each color and the laser scanner device 102 are in a predetermined positional relationship.

このような画像形成装置は、床面の凹凸などにより本体フレーム構造がねじれると、各色の感光体ドラム101K,101M,101Y,101Cとレーザースキャナ装置102との位置関係にズレが生じ、色ズレなどの画像不良の原因になるという問題がある。   In such an image forming apparatus, when the main body frame structure is twisted due to unevenness of the floor surface, a positional relationship between the photosensitive drums 101K, 101M, 101Y, and 101C of each color and the laser scanner device 102 is generated, so There is a problem of causing image defects.

上記問題を解決するために、本体フレーム構造を形成する支持部材をさらに増やして補強し、ねじれ剛性を強くさせる必要があるが、プロセスカートリッジ109K,109M,109Y,109Cの交換作業時に装置前面の開口部を維持でき、かつ部品点数が少なく簡単な構成として、図7に示す従来の画像形成装置のように、支持部材117を追加して支持部材114と115、支持部材115と117、支持部材117と116、支持部材116と114をビスで結合して筒形状フレームを構成し、本体フレーム構造に筒形状を持たせることで、ねじれ剛性を強くさせているものがある。   In order to solve the above problem, it is necessary to further increase and reinforce the support members forming the main body frame structure to increase the torsional rigidity. However, when the process cartridges 109K, 109M, 109Y, and 109C are replaced, As shown in FIG. 7, a support member 117 is added to support members 114 and 115, support members 115 and 117, and support member 117 as in the conventional image forming apparatus shown in FIG. , 116 and support members 116 and 114 are coupled with screws to form a cylindrical frame, and the main body frame structure has a cylindrical shape to increase the torsional rigidity.

特開2001−034031号公報JP 2001-034031 A

しかしながら、上記に説明したような筒形状を持った本体フレーム構造では、レーザースキャナ装置102などの画像形成装置の内蔵パーツが筒形状フレームの中に閉じ込められた状態となり、内蔵パーツを交換あるいはメンテナンスする際に支持部材117を本体から取り外す必要があり、ねじれ剛性を保っていた筒形状フレームを構成する部材が一部無くなるため、再び支持部材117を本体に取り付けた際に、組み立て時に組み立て冶具によって組まれて保持されていた各色の感光体ドラム101K,101M,101Y,101Cとレーザースキャナ装置102との所定の位置関係が崩れるという問題があった。   However, in the main body frame structure having the cylindrical shape as described above, the built-in parts of the image forming apparatus such as the laser scanner device 102 are confined in the cylindrical frame, and the built-in parts are replaced or maintained. When the support member 117 is attached to the main body again, it is necessary to remove the support member 117 from the main body. There is a problem that the predetermined positional relationship between the laser drums 102 and the photosensitive drums 101K, 101M, 101Y, and 101C of the respective colors that are rarely held is lost.

また、上記問題を解決するために、筒形状フレームの外側に全ての内蔵パーツを配置させるという考え方もあるが、筒形状フレームの内側がデッドスペースとなり、本体サイズを大きくさせてしまうという問題がある。   In addition, in order to solve the above problem, there is a concept of arranging all the built-in parts outside the cylindrical frame, but there is a problem that the inside of the cylindrical frame becomes a dead space and the main body size is increased. .

本発明は上記課題を解決するものであり、その目的は、本体フレームのねじれ剛性を確保するとともに、露光手段などの内蔵パーツを交換あるいはメンテナンスする際にもねじれ剛性を維持することができ、部品点数が少なく簡単な構成の本体フレーム構造を有する画像形成装置を提供するものである。   The present invention solves the above-mentioned problems, and its purpose is to ensure the torsional rigidity of the main body frame, and to maintain the torsional rigidity when replacing or maintaining built-in parts such as exposure means. An image forming apparatus having a main body frame structure with a small number of points and a simple configuration is provided.

上記課題を解決するための本発明における代表的な手段は、露光手段によって回転する像担持体に露光して潜像を形成し、該潜像を現像して画像を形成する画像形成装置において、前記像担持体の回転軸方向両端部を支持する側板と、前記側板と結合して該側板を支持する筒型フレームと、を有し、前記筒型フレームは切り欠き部を有し、該切り欠き部から前記筒型フレームの内部へ内蔵部品の少なくとも一部を進入させて取り付けていることを特徴とする。   A typical means in the present invention for solving the above problems is an image forming apparatus in which a latent image is formed by exposing a rotating image carrier by an exposure means, and the latent image is developed to form an image. A side plate that supports both ends of the image carrier in the rotation axis direction, and a cylindrical frame that is coupled to the side plate and supports the side plate, and the cylindrical frame has a notch, It is characterized in that at least a part of the built-in component is inserted from the notch into the inside of the cylindrical frame and attached.

本発明に係る画像形成装置によれば、筒型フレームの一部に切り欠き部を設け、該切り欠き部から露光手段などの本体内蔵部品の一部または全部を筒型フレームの内部へ進入させ、且つ本体に対して切り欠き部を通して着脱可能な構成にすることで、本体フレームのねじれ剛性を高め、且つ画像形成装置本体のサイズを小さくすることが可能で、且つ本体フレームのねじれ剛性を確保しながら内蔵部品の交換あるいはメンテナンスをすることが可能になる。   According to the image forming apparatus of the present invention, a notch portion is provided in a part of the cylindrical frame, and part or all of the main body built-in parts such as the exposure unit are caused to enter the inside of the cylindrical frame from the notch part. In addition, by adopting a structure that can be attached to and detached from the main body through the notch, it is possible to increase the torsional rigidity of the main body frame, reduce the size of the main body of the image forming apparatus, and ensure the torsional rigidity of the main body frame. However, it is possible to replace or maintain the built-in parts.

次に本発明の一実施形態に係る画像形成装置について、図面を参照して具体的に説明する。   Next, an image forming apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings.

〔第1実施形態〕
図1乃至図5は第1実施形態に係るフレーム構成を有する画像形成装置を示すものである。ここでは、まず、図4及び図5を参照して装置の全体構成について説明し、次に図1乃至図3を参照して本体フレーム構成について説明する。
[First Embodiment]
1 to 5 show an image forming apparatus having a frame configuration according to the first embodiment. Here, the overall configuration of the apparatus will be described first with reference to FIGS. 4 and 5, and then the configuration of the main body frame will be described with reference to FIGS. 1 to 3.

{装置全体構成}
図4は本実施形態に係る画像形成装置の概略構成図である。図において、1K,1M,1Y,1Cは像担持体である感光体ドラムであり、それぞれブラック(K)、マゼンダ(M)、イエロー(Y)、シアン(C)の各色の現像剤(トナー)を備えたプロセスカートリッジ2K,2M,2Y,2C毎に回転自在にその両端を支持されて設けられ、図示しない駆動モータおよび駆動伝達手段により一方の端部から駆動伝達され、図4の反時計回りに回転駆動される。表面に有機光導電体層を塗布された各感光体ドラム1K,1M,1Y,1Cは、帯電ローラ3K,3M,3Y,3Cに帯電バイアスを印加することにより、その表面が一様に帯電させられ、露光手段であるレーザースキャナ装置20から発せられたレーザー光により選択的に露光され、静電潜像が形成される。この静電潜像は、現像手段4K,4M,4Y,4Cにより各色のトナーを付着させられ、トナー像として現像される。
{Overall configuration of device}
FIG. 4 is a schematic configuration diagram of the image forming apparatus according to the present embodiment. In the figure, reference numerals 1K, 1M, 1Y, and 1C denote photosensitive drums that are image carriers, and developers (toners) of black (K), magenta (M), yellow (Y), and cyan (C), respectively. The process cartridges 2K, 2M, 2Y, and 2C provided with the two are rotatably supported at both ends, and are transmitted from one end by a drive motor and drive transmission means (not shown), and are rotated counterclockwise in FIG. Is driven to rotate. Each of the photosensitive drums 1K, 1M, 1Y, and 1C having the surface coated with the organic photoconductor layer is charged uniformly by applying a charging bias to the charging rollers 3K, 3M, 3Y, and 3C. Then, it is selectively exposed by a laser beam emitted from a laser scanner device 20 as an exposure means, and an electrostatic latent image is formed. This electrostatic latent image is developed as a toner image by attaching toner of each color by developing means 4K, 4M, 4Y, and 4C.

給送カセット5には転写材6が積載されており、転写材6は図示しない駆動モータおよび駆動伝達手段により所定のタイミングで駆動される給送ローラ7により給送された後、レジストローラ対8を通って転写搬送ベルト9に搬送される。転写搬送ベルト9は、駆動ローラ10および従動ローラ11により支持されており、感光体ドラム1K,1M,1Y,1Cに接触しながら図示しない駆動モータおよび駆動手段により駆動ローラが回転することにより図4の時計回りに回転駆動される。転写材6への転写手段である転写ローラ12K,12M,12Y,12Cには、それぞれ所定の転写バイアスが印加され、転写搬送ベルト9によって搬送される転写材6に感光体ドラム1K,1M,1Y,1C表面上の各色トナー像が転写される。   A transfer material 6 is loaded on the feed cassette 5. The transfer material 6 is fed by a feed roller 7 driven at a predetermined timing by a drive motor and drive transmission means (not shown), and then a registration roller pair 8. And is conveyed to the transfer conveyance belt 9. The transfer / conveying belt 9 is supported by a driving roller 10 and a driven roller 11, and the driving roller is rotated by a driving motor and driving means (not shown) while being in contact with the photosensitive drums 1K, 1M, 1Y, and 1C. It is driven to rotate clockwise. A predetermined transfer bias is applied to the transfer rollers 12K, 12M, 12Y, and 12C that are transfer means to the transfer material 6, and the photosensitive drums 1K, 1M, and 1Y are transferred to the transfer material 6 that is conveyed by the transfer conveyance belt 9. , 1C toner images on the surface are transferred.

4色のトナー像を転写された転写材6は定着装置13に搬入され、トナー像は熱と圧力により転写材6に溶融固着されることによりカラー画像が得られる。定着装置13により搬送された転写材6は排出ローラ対14を通って排出トレイ15に排出、積載される。   The transfer material 6 onto which the four color toner images have been transferred is carried into the fixing device 13, and the toner image is melted and fixed to the transfer material 6 by heat and pressure to obtain a color image. The transfer material 6 conveyed by the fixing device 13 is discharged and stacked on the discharge tray 15 through the discharge roller pair 14.

図5に示すように、転写搬送ベルト9、駆動ローラ10、従動ローラ11とを有する転写搬送ベルト装置16は、その回動支点17を中心に回動可能に構成されており、装置前面側(図5の右側)へ開閉可能となっている。転写搬送ベルト装置16を開けて装置前面に開口部が作られた状態においてプロセスカートリッジ2K,2M,2Y,2Cを着脱することができ、各プロセスカートリッジ2の交換、または各色のトナーの補充を行うことができる。   As shown in FIG. 5, a transfer / conveying belt device 16 having a transfer / conveying belt 9, a driving roller 10, and a driven roller 11 is configured to be rotatable around its rotation fulcrum 17, and the front side of the device ( It can be opened and closed to the right side of FIG. The process cartridges 2K, 2M, 2Y, and 2C can be attached and detached while the transfer / conveying belt device 16 is opened and an opening is formed on the front surface of the device. be able to.

{本体フレーム構成}
次に本発明の特徴である装置本体フレームの構成について説明する。図1に示すように、プロセスカートリッジ2K,2M,2Y,2Cは、その回転軸方向両端部を左側板30および右側板31に形成された支持部40K,40M,40Y,40Cによって支持されている。また、内蔵部品であるレーザースキャナ装置20は前支持部材(第1支持部材)32にビスによって固定され、この前支持部材32は左側板30および右側板31とビスにより結合されている。
{Body frame structure}
Next, the structure of the apparatus main body frame, which is a feature of the present invention, will be described. As shown in FIG. 1, the process cartridges 2K, 2M, 2Y, and 2C are supported by support portions 40K, 40M, 40Y, and 40C formed on the left side plate 30 and the right side plate 31 at both ends in the rotation axis direction. . The laser scanner device 20 as a built-in component is fixed to a front support member (first support member) 32 with screws, and the front support member 32 is coupled to the left side plate 30 and the right side plate 31 with screws.

図2は本実施形態に係る筒型フレームを説明するための本体フレームの断面図である。後支持部材(第2支持部材)33および下支持部材(第3支持部材)34は左右側板30,31とビスで結合され、さらに前支持部材32と後支持部材33、後支持部材33と下支持部材34、下支持部材34と前支持部材32がそれぞれビスで結合されており、それぞれの前支持部材32,33,34の稜線が互いに結合されることで三角形の筒型フレームを形成している。   FIG. 2 is a cross-sectional view of the main body frame for explaining the cylindrical frame according to the present embodiment. The rear support member (second support member) 33 and the lower support member (third support member) 34 are coupled to the left and right side plates 30, 31 with screws, and further, the front support member 32, the rear support member 33, the rear support member 33, and the lower The support member 34, the lower support member 34, and the front support member 32 are coupled by screws, and the ridgelines of the respective front support members 32, 33, 34 are coupled to each other to form a triangular cylindrical frame. Yes.

レーザースキャナ装置20は、図1に示すように、後支持部材33に切り欠き形成した切り欠き部33aより筒型フレームの内部にその一部を進入させた状態で前支持部材32にビスで固定されており、このビスを外すことにより、筒型フレームの外、さらに画像形成装置本体外部に取り外しができる構成になっている。また、画像形成装置本体外部からレーザースキャナ装置20を前支持部材32に取り付ける際も、後支持部材33の切り欠き部33aより筒型フレームの内部に進入させて前支持部材32にビスで固定できる構成になっている。   As shown in FIG. 1, the laser scanner device 20 is fixed to the front support member 32 with a screw in a state where a part of the notch 33a is notched into the rear support member 33 and enters the inside of the cylindrical frame. Thus, by removing this screw, it is possible to remove the screw outside the cylindrical frame and further outside the main body of the image forming apparatus. Further, when the laser scanner device 20 is attached to the front support member 32 from the outside of the image forming apparatus main body, the laser scanner device 20 can enter the inside of the cylindrical frame from the notch 33a of the rear support member 33 and be fixed to the front support member 32 with screws. It is configured.

そして、前記前支持部材32にはレーザースキャナ装置20が照射するレーザー光が通過するための光通過部である透光孔が4個並列に設けられており、この透光孔を介してレーザースキャナ装置20から感光体ドラム1K,1M,1Y,1Cへ画信号に応じたレーザー光が照射される。   The front support member 32 is provided with four light-transmitting holes, which are light-transmitting portions through which the laser light emitted from the laser scanner device 20 passes, arranged in parallel, and through this light-transmitting hole, the laser scanner is provided. Laser light corresponding to the image signal is irradiated from the apparatus 20 to the photosensitive drums 1K, 1M, 1Y, and 1C.

また、前記下支持部材34にはレーザースキャナ装置20を前支持部材32に取り付けるための工具が通過するための工具通過部としての孔部が形成されており、この孔部から筒型フレーム内に工具を通すことでレーザースキャナ装置20の着脱を容易になし得るようになっている。   The lower support member 34 is formed with a hole as a tool passage for allowing a tool for attaching the laser scanner device 20 to the front support member 32 to pass through the hole, and into the cylindrical frame. The laser scanner device 20 can be easily attached and detached by passing a tool.

次に、本体フレームの組み付け方について説明する。特に本実施形態に示すようなカラー画像を出力させる画像形成装置は、4色の感光体ドラム1K,1M,1Y,1Cとレーザースキャナ装置20の位置関係のズレおよびレーザースキャナ装置20自体の歪みが色ズレなどの画像不良の原因となる。そこで、まず、レーザースキャナ装置20の前支持部材32への取り付け面の平面を保つように図示しない組み立て冶具で保持しておき、後支持部材33と前支持部材32および下支持部材34と前支持部材32とをビスにより結合する。次に、後支持部材33と下支持部材34とをビスにより結合し、三角形の筒型フレームを完成させる。こうすることで、後支持部材33または下支持部材34と前支持部材32が結合時に引っ張り合う力が無くなり、筒型フレームに残留応力が無くなり、筒型フレームを組み立て冶具から外した時に残留応力によって変形してしまう問題が無く、ねじれ剛性を格段に高め、且つ部品点数の少ない簡単な構成の本体フレームにすることができる。   Next, how to assemble the main body frame will be described. In particular, in the image forming apparatus for outputting a color image as shown in the present embodiment, the positional relationship between the four color photosensitive drums 1K, 1M, 1Y, and 1C and the laser scanner device 20 and the distortion of the laser scanner device 20 itself are distorted. It causes image defects such as color misregistration. Therefore, first, the laser scanner device 20 is held by an assembly jig (not shown) so as to keep the plane of the attachment surface to the front support member 32, and the rear support member 33, the front support member 32, the lower support member 34, and the front support The member 32 is coupled with a screw. Next, the rear support member 33 and the lower support member 34 are coupled with screws to complete a triangular cylindrical frame. By doing so, the rear support member 33 or the lower support member 34 and the front support member 32 do not have a pulling force when coupled, the residual stress is eliminated from the cylindrical frame, and the residual stress is removed when the cylindrical frame is removed from the assembly jig. There is no problem of deformation, the torsional rigidity is remarkably increased, and the main body frame having a simple configuration with a small number of parts can be obtained.

その後、三角形の筒型フレームを構成する各支持部材32,33、および34と左右側板30,31とをビスで結合する。このとき、三角形の筒型フレームと左右側板30,31との位置関係は前支持部材32の位置決め用突起(図示せず)を左右側板30,31の位置決め用穴(図示せず)に嵌合させることで位置決めされ、感光体ドラム1K,1M,1Y,1Cを内包するプロセスカートリッジ2K,2M,2Y,2Cを支持する左右側板30,31の支持部40K,40M,40Y,40Cと、レーザースキャナ装置20を保持する前支持部材32とが所定の位置関係になる。   Thereafter, the support members 32, 33, and 34 constituting the triangular cylindrical frame and the left and right side plates 30, 31 are coupled with screws. At this time, the positional relationship between the triangular cylindrical frame and the left and right side plates 30, 31 is such that the positioning protrusions (not shown) of the front support member 32 are fitted into the positioning holes (not shown) of the left and right side plates 30, 31. , And support portions 40K, 40M, 40Y, 40C of the left and right side plates 30, 31 that support the process cartridges 2K, 2M, 2Y, 2C that contain the photosensitive drums 1K, 1M, 1Y, 1C, and a laser scanner The front support member 32 that holds the device 20 has a predetermined positional relationship.

なお、図3に示すように、後支持部材33′と下支持部材34′の結合面を前支持部材32に対して略垂直にしてもよい。こうすることで、三角形筒型フレームを構成する各支持部材32,33′、34′の締結面の部品精度があまり良くない場合でも互いの部品が引っ張り合う力を最小限にできる。   As shown in FIG. 3, the coupling surface of the rear support member 33 ′ and the lower support member 34 ′ may be substantially perpendicular to the front support member 32. In this way, even when the component accuracy of the fastening surfaces of the support members 32, 33 ', 34' constituting the triangular cylindrical frame is not very good, the force with which the components are pulled can be minimized.

以上述べた順序で三角形筒型フレームを組み立ててから、最後に左右側板30,31と後支持部材33、下支持部材34をビスで結合する。こうすることで、三角形筒型フレームの互いに引っ張り合う力により本体フレームを変形させてしまうという問題が無くなる。   After assembling the triangular cylindrical frame in the order described above, finally, the left and right side plates 30, 31 are connected to the rear support member 33 and the lower support member 34 with screws. This eliminates the problem that the main body frame is deformed by the pulling force of the triangular cylindrical frame.

〔他の実施形態〕
なお、本実施形態において本体フレームを構成する左右側板30,31と各支持部材32,33,34の結合方法はビスにより示したが、トックカシメ等の方法や溶接により固着させることでも良い。
[Other Embodiments]
In the present embodiment, the connecting method of the left and right side plates 30, 31 and the support members 32, 33, 34 constituting the main body frame is shown by screws, but it may be fixed by a method such as toe caulking or by welding.

また、三角形の筒型フレームを構成する支持部材は3つの支持部材で構成されるように示したが、本体フレームの組み立て精度があまり必要でない場合は、例えば後支持部材33と下支持部材34を一体のプレス板金の曲げ加工で作っても良い。   Further, the support member constituting the triangular cylindrical frame is shown to be composed of three support members. However, when the assembly accuracy of the main body frame is not so necessary, for example, the rear support member 33 and the lower support member 34 are provided. It may be made by bending an integrated press sheet metal.

また、切り欠き部33aより筒型フレームの内部に進入する画像形成装置の内蔵パーツはレーザースキャナ装置20だけに限らず、電装基板や駆動ユニットなどでも良い。また、ねじり剛性を強めるための筒型フレームは、その断面形状が三角形の筒型フレームとしたが、筒型になっていればその断面形状は三角形に限ったものではない。   Further, the built-in parts of the image forming apparatus that enter the inside of the cylindrical frame from the notch 33a are not limited to the laser scanner device 20, but may be an electrical board or a drive unit. In addition, the cylindrical frame for increasing the torsional rigidity is a triangular cylindrical frame, but the cross-sectional shape is not limited to a triangle as long as the cylindrical frame has a cylindrical shape.

本発明の実施形態に係る画像形成装置の特徴である筒型フレームの概略図である。1 is a schematic view of a cylindrical frame that is a feature of an image forming apparatus according to an embodiment of the present invention. 本発明の実施形態に係る画像形成装置の特徴である筒型フレームの断面図である。1 is a cross-sectional view of a cylindrical frame that is a feature of an image forming apparatus according to an embodiment of the present invention. 本発明の実施形態に係る画像形成装置の特徴である筒型フレームの締結面の1例を示す断面図である。FIG. 4 is a cross-sectional view illustrating an example of a fastening surface of a cylindrical frame that is a feature of the image forming apparatus according to the embodiment of the present invention. 本発明の実施形態に係る画像形成装置を説明するための概略図である。1 is a schematic diagram for explaining an image forming apparatus according to an embodiment of the present invention. 本発明の実施形態に係る画像形成装置のプロセスカートリッジを着脱する際の概略図である。FIG. 2 is a schematic view when a process cartridge is attached to and detached from the image forming apparatus according to the embodiment of the present invention. 従来の画像形成装置を説明するための概略図である。It is the schematic for demonstrating the conventional image forming apparatus. 従来の画像形成装置のフレームの概略図である。It is the schematic of the flame | frame of the conventional image forming apparatus.

符号の説明Explanation of symbols

1K,1M,1Y,1C …感光体ドラム
2K,2M,2Y,2C …プロセスカートリッジ
3K,3M,3Y,3C …帯電ローラ
4K,4M,4Y,4C …現像手段
5 …給送カセット
6 …転写材
7 …給送ローラ
8 …レジストローラ対
9 …転写搬送ベルト
10 …駆動ローラ
11 …従動ローラ
12K,12M,12Y,12C …転写ローラ
13 …定着装置
14 …排出ローラ対
15 …排出トレイ
16 …転写搬送ベルト装置
17 …回動支点
20 …レーザースキャナ装置
30 …左側板
31 …右側板
32 …前支持部材
33 …後支持部材
33′ …後支持部材
33a …切り欠き部
34 …下支持部材
34′ …下支持部材
40K,40M,40Y,40C …支持部
1K, 1M, 1Y, 1C ... photosensitive drums 2K, 2M, 2Y, 2C ... process cartridges 3K, 3M, 3Y, 3C ... charge rollers 4K, 4M, 4Y, 4C ... developing means 5 ... feed cassette 6 ... transfer material 7: Feed roller 8: Registration roller pair 9: Transfer conveyance belt
10… Drive roller
11… driven roller
12K, 12M, 12Y, 12C ... transfer roller
13… Fixing device
14… discharge roller pair
15… discharge tray
16 Transfer transfer belt device
17… Rotating fulcrum
20 ... Laser scanner device
30… Left side plate
31… Right side plate
32… Front support member
33… Rear support member
33 ′… Rear support member
33a ... Notch
34… Lower support member
34 ′… Lower support member
40K, 40M, 40Y, 40C ... support part

Claims (6)

露光手段によって回転する像担持体に露光して潜像を形成し、該潜像を現像して画像を形成する画像形成装置において、
前記像担持体の回転軸方向両端部を支持する側板と、
前記側板と結合して該側板を支持する筒形状の筒型フレームと、
を有し、
前記筒型フレームは切り欠き部を有し、該切り欠き部から前記筒型フレームの内部へ内蔵部品の少なくとも一部を進入させて取り付けていることを特徴とする画像形成装置。
In an image forming apparatus for forming an image by exposing a rotating image carrier by an exposure unit to form a latent image and developing the latent image,
Side plates supporting both ends of the image carrier in the rotation axis direction;
A tubular cylindrical frame that is coupled to the side plate and supports the side plate;
Have
2. The image forming apparatus according to claim 1, wherein the cylindrical frame has a notch, and at least a part of the built-in component is inserted into the cylindrical frame from the notch and attached.
前記筒型フレームは三角形状であることを特徴とする請求項1記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the cylindrical frame has a triangular shape. 前記内蔵部品は、前記露光手段であることを特徴とする請求項1又は請求項2に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the built-in component is the exposure unit. 前記露光手段はレーザースキャナ装置であることを特徴とする請求項3記載の画像形成装置。 4. The image forming apparatus according to claim 3, wherein the exposure unit is a laser scanner device. 前記内蔵部品は、前記筒型フレームの筒形状を保持したまま前記切り欠き部から前記筒型フレームの内部へ着脱可能であることを特徴とする請求項1乃至請求項4のいずれかに記載の画像形成装置。 5. The built-in component is detachable from the cutout portion to the inside of the cylindrical frame while maintaining the cylindrical shape of the cylindrical frame. 6. Image forming apparatus. 前記側板に4個の像担持体を回転可能に支持し、
前記側板を支持する前記筒型フレームは第1支持部材、第2支持部材、第3支持部材の3枚の板状部材の稜線を結合して構成した三角形状であり、
前記第1支持部材は、前記像担持体を露光するためのレーザースキャナ装置を取り付けるとともに、該レーザースキャナ装置からの照射されるレーザー光が通過するための光通過部を有し、
前記第2支持部材は、前記レーザースキャナ装置を着脱するための切り欠き部を有し、
前記第3支持部材は、前記レーザースキャナ装置を前記第1支持部材に取り付けるための工具が通過するための工具通過部を有する
ことを特徴とする請求項1記載の画像形成装置。
Four image carriers are rotatably supported on the side plate,
The cylindrical frame that supports the side plate is a triangular shape configured by combining ridge lines of three plate-like members of a first support member, a second support member, and a third support member,
The first support member is provided with a laser scanner device for exposing the image carrier, and has a light passage portion through which laser light emitted from the laser scanner device passes,
The second support member has a notch for attaching and detaching the laser scanner device,
The image forming apparatus according to claim 1, wherein the third support member has a tool passage portion through which a tool for attaching the laser scanner device to the first support member passes.
JP2003416461A 2003-12-15 2003-12-15 Image forming device Pending JP2005173455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003416461A JP2005173455A (en) 2003-12-15 2003-12-15 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003416461A JP2005173455A (en) 2003-12-15 2003-12-15 Image forming device

Publications (1)

Publication Number Publication Date
JP2005173455A true JP2005173455A (en) 2005-06-30

Family

ID=34735650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003416461A Pending JP2005173455A (en) 2003-12-15 2003-12-15 Image forming device

Country Status (1)

Country Link
JP (1) JP2005173455A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986495B1 (en) * 2007-06-18 2010-10-08 캐논 가부시끼가이샤 Image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986495B1 (en) * 2007-06-18 2010-10-08 캐논 가부시끼가이샤 Image forming apparatus
US7877041B2 (en) 2007-06-18 2011-01-25 Canon Kabushiki Kaisha Image forming apparatus with exposure support member

Similar Documents

Publication Publication Date Title
JP3782807B2 (en) Process cartridge and method for attaching electrophotographic photosensitive drum
JP3566697B2 (en) Process cartridge, electrophotographic image forming apparatus, and separation mechanism
JP4444997B2 (en) Process cartridge and electrophotographic image forming apparatus
JP3958272B2 (en) Process cartridge and electrophotographic image forming apparatus
JP2005099691A (en) Processing cartridge and electrophotographic image forming apparatus
JP2008028988A (en) Frame, electronic device, image forming apparatus, and frame assembly method
JP5153222B2 (en) Image forming apparatus
KR20110076996A (en) Process cartridge, electrophotographic image forming apparatus and developing roller
JP2006276190A (en) Process cartridge and electrophotographic image forming apparatus
JP2005189664A (en) Transfer belt unit and image forming apparatus
JP4934418B2 (en) Process cartridge
JP2002169353A (en) Image forming device
JP2001242671A (en) Image forming device
JPH1090967A (en) Electrophotographic image forming device and image forming unit
JP6202387B2 (en) Process cartridge and image forming apparatus
JP2012177778A (en) Process unit and image forming apparatus
JP2004109766A (en) Driving device and image forming device
JP6406210B2 (en) Image forming apparatus
JP2005173455A (en) Image forming device
JP3997247B2 (en) Electrophotographic image forming apparatus
JP2002040738A (en) Image forming device
JP4280721B2 (en) Process cartridge
JP2007322565A (en) Developing device and image forming apparatus equipped with the same
JP2007226007A (en) Image forming apparatus, image-formation unit, and method for assembling image forming apparatus
JP4378393B2 (en) Process cartridge