JP2007240992A - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

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Publication number
JP2007240992A
JP2007240992A JP2006064922A JP2006064922A JP2007240992A JP 2007240992 A JP2007240992 A JP 2007240992A JP 2006064922 A JP2006064922 A JP 2006064922A JP 2006064922 A JP2006064922 A JP 2006064922A JP 2007240992 A JP2007240992 A JP 2007240992A
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forming apparatus
image forming
fixing
fixing device
side housing
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JP4893030B2 (en
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Kiyoshi Iwai
清 岩井
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To easily remove paper jammed in a fixing section and to ensure safety when removing a fixing device. <P>SOLUTION: The image forming apparatus includes: a heat roll 11 and pressure roll 12 that heat and fix an image formed on a recording material; a heat roll side housing 13 and pressure roll side housing 14 disposed around the rolls; a fixing member 20 by which the pressure roll side housing 14 is fixed to the heat roll side housing 13 so as not to be rotated; and a position regulating member 50 that releases the fixing member 20 from its fixing state when inserted in the image forming apparatus 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、未定着トナー像を定着させる定着装置を備えた画像形成装置に関する。特に、画像形成装置から取り外し可能な定着装置に関する。   The present invention relates to an image forming apparatus including a fixing device that fixes an unfixed toner image. In particular, the present invention relates to a fixing device that is removable from an image forming apparatus.

画像の形成を行う画像形成装置には、用紙に転写したトナー像を加熱、加圧定着させる定着装置が搭載されている。このような定着装置としては、例えば内部に加熱源を有する加熱ロールと、この加熱ロールに圧接する加圧ロールとを備え、加熱ロールと加圧ロールとのニップ部に用紙を通過させるようにしたものが知られている。   An image forming apparatus that forms an image is equipped with a fixing device that heats and pressurizes and fixes a toner image transferred onto a sheet. As such a fixing device, for example, a heating roll having a heating source therein and a pressure roll that is in pressure contact with the heating roll are provided, and paper is passed through a nip portion between the heating roll and the pressure roll. Things are known.

しかしながら定着装置には、高温に加熱された加熱ローラを含むため、安全対策上の観点から、また機構の精度を保持する観点からもユニット化が行われている。   However, since the fixing device includes a heating roller heated to a high temperature, unitization is performed from the viewpoint of safety measures and from the viewpoint of maintaining the accuracy of the mechanism.

しかし、画像形成装置内を用紙が搬送される際、給紙部から用紙の送り出しのタイミングが遅れた場合、搬送中に用紙がスリップしたり、引っ掛かったりして詰まることがある（いわゆる、ジャム）。この場合、詰まった用紙を装置内から除去するためにユニット化された定着装置内に手を入れる必要がでてくる。   However, when the paper is transported through the image forming apparatus, if the paper feeding timing is delayed from the paper feeding unit, the paper may slip or become jammed during transportation (so-called jam). . In this case, it is necessary to put a hand in the fixing device unitized in order to remove the jammed paper from the inside of the device.

そこで、作業者が簡単かつ安全に詰まった用紙を除去できるように、種々の提案がなされている。   Therefore, various proposals have been made so that the operator can easily and safely remove the jammed paper.

特許文献１では、定着ユニットが画像形成装置から取り外された時だけ、用紙をガイドするガイド部が非ガイド位置に移動して装置内に詰まった用紙を除去できるように構成している。   In Japanese Patent Laid-Open No. 2004-260260, only when the fixing unit is removed from the image forming apparatus, the guide unit that guides the sheet moves to the non-guide position so that the sheet jammed in the apparatus can be removed.

特開２００５−１５７０３２号公報JP-A-2005-157032

しかしながら、特許文献１は定着ユニットは、画像形成装置から取り外さないと詰まった用紙を取り除くことができない。また、画像の形成中に定着ユニットの交換を行った場合、誤ってガイド部を非ガイド位置に移動させてしまい、定着ユニットの高温部に作業者が触れてしまうという危険性もある。さらに、ガイド部はスプリング等によって付勢されているので、ガイド部材を片方の手で支持しながら詰まった用紙を除去しなければならず、不慣れな作業者にとっては除去作業が難しくなる。   However, in Patent Document 1, the fixing unit cannot remove the jammed paper unless it is removed from the image forming apparatus. Also, if the fixing unit is replaced during image formation, there is a risk that the guide unit will be mistakenly moved to the non-guide position, and the operator may touch the high temperature portion of the fixing unit. Further, since the guide portion is urged by a spring or the like, the jammed paper must be removed while supporting the guide member with one hand, which makes it difficult for an unaccustomed worker to remove.

本発明は上記事情に鑑みてなされたものであり、定着部に詰まった用紙を簡単に除去することができ、定着装置を取り外したときの安全性を確保した画像形成装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image forming apparatus that can easily remove paper jammed in a fixing unit and ensures safety when the fixing device is removed. And

かかる目的を達成するために本発明の画像形成装置は、記録材に形成された画像を加熱定着する定着部と、前記定着部の周囲に設けられた第１の筐体及び第２の筐体と、前記第２の筐体が前記第１の筐体に対して回動しないように固定する固定部材とを有する定着装置と、画像形成装置内に挿入された前記定着装置の前記固定部材の固定を解除する解除部材とを有して構成している。
このように本発明は、固定部材を設けると共に、画像形成装置内に挿入されると、固定部材の固定を解除する解除部材を設けたことで、詰まった用紙を簡単に除去できると共に、定着装置を画像形成装置から取り外したときの安全性を確保することができる。 In order to achieve this object, an image forming apparatus according to the present invention includes a fixing unit that heat-fixes an image formed on a recording material, and a first casing and a second casing provided around the fixing unit. And a fixing device that fixes the second housing so as not to rotate with respect to the first housing, and the fixing member of the fixing device inserted into the image forming apparatus. And a release member for releasing the fixation.
As described above, according to the present invention, the fixing member is provided, and when inserted into the image forming apparatus, the releasing member for releasing the fixing of the fixing member is provided, so that the jammed paper can be easily removed and the fixing device can be removed. It is possible to ensure safety when the is removed from the image forming apparatus.

上記画像形成装置において、前記固定部材は、前記第２の筐体に取り付けられた受け具と、前記第１の筐体に回転可能に取り付けられ、前記受け具と係合する係合部材とを有し、前記解除部材が前記係合部材に当接することで、前記係合部材が前記受け具との係合可能位置から移動し、前記固定部材の固定を解除するとよい。
従って、簡単な部材で、第２の筐体が第１の筐体に対して動かないように固定することができる。 In the image forming apparatus, the fixing member includes a receiving member attached to the second housing, and an engaging member that is rotatably attached to the first housing and engages with the receiving member. And the release member abuts on the engagement member, so that the engagement member moves from a position where it can engage with the receiver, and the fixation of the fixation member is released.
Therefore, the second housing can be fixed so as not to move with respect to the first housing with a simple member.

上記画像形成装置において、前記第２の筐体は、画像形成装置内において負荷なく回動可能であるとよい。   In the image forming apparatus, it is preferable that the second casing can be rotated without load in the image forming apparatus.

上記画像形成装置において、前記第２の筐体は、前記定着部を通過した用紙の搬送ガイド部を兼ねるとよい。   In the image forming apparatus, the second casing may also serve as a conveyance guide unit for the sheet that has passed through the fixing unit.

本発明によれば、定着部に詰まった用紙を簡単に除去できると共に、定着装置を取り外したときの安全性を確保することができる。   According to the present invention, it is possible to easily remove the paper jammed in the fixing unit, and it is possible to ensure safety when the fixing device is removed.

添付図面を参照しながら本発明の好適な実施例を説明する。   Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

図１に、定着装置１０を搭載した画像形成装置１の構成を示す。この画像形成装置１は矢印方向に回転する潜像担持体としての感光体ドラム２ａと、この感光体ドラム２ａの表面を一様に帯電させる帯電ロール２ｂと、帯電した感光体ドラム２ａの表面に画像情報（複写機であれば原稿の読み取り画像、プリンタであれば外部機器から入力される入力画像等）に応じた露光像を形成し、静電潜像を形成する露光装置２ｃと、感光体ドラム２ａの表面に形成された静電潜像を現像剤により可視化する現像装置２ｄと、給紙トレイ３から搬送ロール４により搬送されて、レジストロール５により所定のタイミングで供給される記録用紙Ｐに上記現像装置２ｄで可視化されたトナー像を転写する転写ロール２ｅと、転写ロール２ｅによって記録用紙Ｐ上のトナー像を定着させる定着装置１０と、トナー像が記録用紙Ｐに転写された後に感光体ドラム２ａの表面に残留した残留トナー等を除去して清掃するクリーニング装置２ｆ等を備えている。定着装置１０による未定着トナー像の定着後、記録用紙Ｐは定着装置１０の搬送経路下流側（図１中では定着装置１０の上方）の搬送ロール６から装置外部に排出されるようになっている。   FIG. 1 shows a configuration of an image forming apparatus 1 equipped with a fixing device 10. The image forming apparatus 1 includes a photosensitive drum 2a as a latent image carrier that rotates in the direction of an arrow, a charging roll 2b that uniformly charges the surface of the photosensitive drum 2a, and a surface of the charged photosensitive drum 2a. An exposure device 2c that forms an exposure image according to image information (an image read from an original in the case of a copier, an input image input from an external device in the case of a printer, etc.) and forms an electrostatic latent image; A developing device 2d that visualizes the electrostatic latent image formed on the surface of the drum 2a with a developer, and a recording paper P that is transported from the paper feed tray 3 by the transport roll 4 and supplied by the resist roll 5 at a predetermined timing. A transfer roll 2e for transferring the toner image visualized by the developing device 2d, a fixing device 10 for fixing the toner image on the recording paper P by the transfer roll 2e, and the toner image for recording. To remove residual toner and the like remaining on the surface of the photosensitive drum 2a after being transferred to the P and a cleaning device 2f like cleaning. After fixing the unfixed toner image by the fixing device 10, the recording paper P is discharged from the conveying roll 6 on the downstream side of the conveying path of the fixing device 10 (above the fixing device 10 in FIG. 1) to the outside of the apparatus. Yes.

定着装置１０は、図１に示すように、互いに圧接しながら回転する加熱ロール１１及び加圧ロール１２を備えたロールニップ方式の定着装置であって、加熱ロール１１及び加圧ロール１２はハウジング内に収容されている。ハウジングは図２に示すように加熱ロール１１側の加熱ロール側ハウジング（本発明の第１の筐体に該当する）１３と、加圧ロール１２側の加圧ロール側ハウジング（本発明の第２の筐体に該当する）１４とに分割されている。加圧ロール側ハウジング１４は、加熱ロール１１と加圧ロール１２とのニップ部を通過した用紙を排出口方向にガイドする用紙搬送ガイド部の機能も備えている。   As shown in FIG. 1, the fixing device 10 is a roll nip type fixing device including a heating roll 11 and a pressure roll 12 that rotate while being pressed against each other, and the heating roll 11 and the pressure roll 12 are placed in a housing. Contained. As shown in FIG. 2, the housing includes a heating roll side housing 13 (corresponding to the first casing of the present invention) 13 on the heating roll 11 side and a pressure roll side housing (second section of the present invention) on the pressure roll 12 side. 14) (corresponding to the housing). The pressure roll side housing 14 also has a function of a paper conveyance guide part that guides the paper that has passed through the nip part between the heating roll 11 and the pressure roll 12 in the discharge port direction.

また、加圧ロール側ハウジング１４は、図３に示すように加熱ロール側ハウジング１３に対して回動可能に取り付けられており、加圧ロール側ハウジング１４を回動させることで、加熱ロール１１と加圧ロール１２のニップ部が露出する。従って、定着装置１０内に詰まった用紙を取り除くことができる。図４、５には定着装置１０の全体像を示し、図４には加圧ロール側ハウジング１４を閉じた状態を示し、図５には加圧ロール側ハウジング１４を開いた状態を示す。   Further, as shown in FIG. 3, the pressure roll side housing 14 is rotatably attached to the heating roll side housing 13. By rotating the pressure roll side housing 14, The nip portion of the pressure roll 12 is exposed. Therefore, the paper jammed in the fixing device 10 can be removed. 4 and 5 show the entire image of the fixing device 10, FIG. 4 shows a state in which the pressure roll side housing 14 is closed, and FIG. 5 shows a state in which the pressure roll side housing 14 is opened.

しかしながら定着装置１０の交換等によって定着装置１０を画像形成装置１内から取り出した時には、定着装置１０内の高温部に誤って使用者が触れないようにハウジングがロックされていることが好ましい。そこで、本実施例は図６に示すように定着装置１０の長手方向端部に加圧ロール側ハウジング１４を加熱ロール側ハウジング１３に固定する固定部材２０を設けている。この固定部材２０は、図７に示すように加圧ロール側ハウジング１４に設けられた受け具４０と、加熱ロール側ハウジング１３に設けられ、前述受け具４０と係合する係合部材３０とを備えている。   However, when the fixing device 10 is taken out from the image forming apparatus 1 by replacing the fixing device 10 or the like, it is preferable that the housing is locked so that the user does not accidentally touch the high temperature portion in the fixing device 10. Therefore, in this embodiment, as shown in FIG. 6, a fixing member 20 for fixing the pressure roll side housing 14 to the heating roll side housing 13 is provided at the longitudinal end portion of the fixing device 10. As shown in FIG. 7, the fixing member 20 includes a receiver 40 provided on the pressure roll side housing 14 and an engagement member 30 provided on the heating roll side housing 13 and engaged with the receiver 40. I have.

係合部材３０は、定着装置１０が画像形成装置外にある時には、受け具４０と係合して加圧ロール側ハウジング１４が回動しないように固定する。図７に、係合部材３０が受け具４０と係合した状態を示す。   When the fixing device 10 is outside the image forming apparatus, the engaging member 30 is engaged with the receiving member 40 and fixed so that the pressure roll side housing 14 does not rotate. FIG. 7 shows a state in which the engaging member 30 is engaged with the receiving tool 40.

また、定着装置１０が画像形成装置１内の所定位置に取り付けられると、画像形成装置１に設けた位置規制部材５０が係合部材３０に当接し、係合部材３０を受け具４０と係合できない位置に移動させる。図８にこの様子を示す。
係合部材３０は、図７に示す回転軸３１を中心として回転できるように加熱ロール側ハウジング１３に取り付けられており、また位置規制部材５０による押圧力がない状態では、受け具４０と係合できる位置を取るように付勢されている（係合部材３０を付勢しているバネ、スプリング等については図示を省略する）。位置規制部材５０は、画像形成装置本体に設けられており、画像形成装置本体の装着位置から定着装置１０を移動させると、位置規制部材５０が定着装置１０から離れるようになっている。 When the fixing device 10 is attached to a predetermined position in the image forming apparatus 1, the position regulating member 50 provided in the image forming apparatus 1 comes into contact with the engaging member 30, and the engaging member 30 is engaged with the receiving tool 40. Move to a position where it cannot. FIG. 8 shows this state.
The engaging member 30 is attached to the heating roll side housing 13 so as to be able to rotate around the rotating shaft 31 shown in FIG. 7, and engages with the receiving member 40 in a state where there is no pressing force by the position restricting member 50. It is biased so as to take a position where it can be formed (the illustration of the spring, spring, etc. biasing the engaging member 30 is omitted). The position regulating member 50 is provided in the image forming apparatus main body, and when the fixing device 10 is moved from the mounting position of the image forming apparatus main body, the position regulating member 50 is separated from the fixing device 10.

また、画像形成装置１の外装カバー６０には、図９に示す規制部材６１が設けられている。この規制部材６１は、外装カバー６０が閉じられると、定着装置１０の加圧ロール側ハウジング１４に当接して、加圧ロール側ハウジング１４が開かないように固定する。従って、定着装置１０が画像形成装置内に装着された時には、規制部材６１が加圧ロール側ハウジン１４を押圧することで、ハウジングが開かないように規制している。また、画像形成装置１の外装カバーが開かれると、固定部材２０、規制部材６１による規制がないので、加圧ロール側ハウジング１４を開くことができる。さらに、定着装置１０を画像形成装置内の装着位置から移動させると、位置規制部材５０の係合部材３０への規制がなくなり、係合部材３０が受け具４０に係合する。従って、定着装置１０が画像形成装置１内から取り出した時には、ハウジングをロックすることができ、定着装置１０内の高温部に誤って使用者が触れてしまう危険を防止することができる。   Further, the exterior cover 60 of the image forming apparatus 1 is provided with a regulating member 61 shown in FIG. When the exterior cover 60 is closed, the restricting member 61 contacts the pressure roll side housing 14 of the fixing device 10 and fixes the pressure roll side housing 14 so as not to open. Therefore, when the fixing device 10 is mounted in the image forming apparatus, the restricting member 61 presses the pressure roll side housing 14 to restrict the housing from being opened. Further, when the exterior cover of the image forming apparatus 1 is opened, there is no restriction by the fixing member 20 and the restriction member 61, so that the pressure roll side housing 14 can be opened. Further, when the fixing device 10 is moved from the mounting position in the image forming apparatus, the position restricting member 50 is not restricted to the engaging member 30, and the engaging member 30 is engaged with the receiving member 40. Therefore, when the fixing device 10 is taken out from the image forming apparatus 1, the housing can be locked, and the danger that the user accidentally touches the high temperature portion in the fixing device 10 can be prevented.

上述した実施例は本発明の好適な実施例である。但し、これに限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変形実施可能である。   The embodiment described above is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

画像形成装置の構成を示す図である。1 is a diagram illustrating a configuration of an image forming apparatus. 定着装置の構成を示す図であり、加圧ロール側ハウジングを閉じた状態を示す図である。It is a figure which shows the structure of a fixing device, and is a figure which shows the state which closed the pressure roll side housing. 定着装置の構成を示す図であり、加圧ロール側ハウジングを開いた状態を示す図である。It is a figure which shows the structure of a fixing device, and is a figure which shows the state which opened the pressure roll side housing. 定着装置の全体像を示す図であり、加圧ロール側ハウジングを閉じた状態を示す図である。FIG. 3 is a diagram illustrating an entire image of the fixing device, and a state in which a pressure roll side housing is closed. 定着装置の全体像を示す図であり、加圧ロール側ハウジングを開いた状態を示す図である。FIG. 2 is a diagram illustrating an entire image of a fixing device, and a diagram illustrating a state where a pressure roll side housing is opened. 固定部材の取り付け位置を示す図である。It is a figure which shows the attachment position of a fixing member. 固定部材の構成を示す図であり、係合部材が受け具に係合した状態を示す図である。It is a figure which shows the structure of a fixing member, and is a figure which shows the state which the engaging member engaged with the receiver. 固定部材の構成を示す図であり、係合部材と受け具の係合が外れた状態を示す図である。It is a figure which shows the structure of a fixing member, and is a figure which shows the state from which engagement of the engaging member and the receiver was released. 外装カバーに取り付けられた位置規制部材を示す図である。It is a figure which shows the position control member attached to the exterior cover.

符号の説明Explanation of symbols

１ 画像形成装置
２ｂ 帯電ロール
２ｃ 露光装置
２ｄ 現像装置
２ｅ 転写ロール
２ｆ クリーニング装置
３ 給紙トレイ
４ 搬送ロール
５ レジストロール
１０ 定着装置
１１ 加熱ロール
１２ 加圧ロール
１３ 加熱ロール側ハウジング
１４ 加圧ロール側ハウジング
２０ 固定部材
３０ 係合部材
３１ 回転軸
４０ 受け具
５０ 位置規制部材
６０ 外装カバー
DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2b Charging roll 2c Exposure apparatus 2d Developing apparatus 2e Transfer roll 2f Cleaning apparatus 3 Paper feed tray 4 Conveyance roll 5 Registration roll 10 Fixing apparatus 11 Heating roll 12 Pressure roll 13 Heating roll side housing 14 Pressure roll side housing 14 DESCRIPTION OF SYMBOLS 20 Fixing member 30 Engagement member 31 Rotating shaft 40 Receiving tool 50 Position control member 60 Exterior cover

Claims (4)

記録材に形成された画像を加熱定着する定着部と、前記定着部の周囲に設けられた第１の筐体及び第２の筐体と、前記第２の筐体が前記第１の筐体に対して回動しないように固定する固定部材とを有する定着装置と、
画像形成装置内に挿入された前記定着装置の前記固定部材の固定を解除する解除部材とを有することを特徴とする画像形成装置。 A fixing unit that heat-fixes an image formed on a recording material, a first casing and a second casing provided around the fixing unit, and the second casing is the first casing A fixing device having a fixing member that is fixed so as not to rotate,
An image forming apparatus comprising: a release member that releases the fixing member of the fixing device inserted into the image forming apparatus. 前記固定部材は、前記第２の筐体に取り付けられた受け具と、前記第１の筐体に回転可能に取り付けられ、前記受け具と係合する係合部材とを有し、
前記解除部材が前記係合部材に当接することで、前記係合部材が前記受け具との係合可能位置から移動し、前記固定部材の固定を解除することを特徴とする請求項１記載の画像形成装置。 The fixing member includes a receiver attached to the second housing, and an engaging member that is rotatably attached to the first housing and engages the receiver.
2. The fixing member according to claim 1, wherein the engaging member moves from a position where the engaging member can be engaged with the receiving member, and the fixing member is released when the releasing member contacts the engaging member. Image forming apparatus. 前記第２の筐体は、画像形成装置内において負荷なく回動可能であることを特徴とする請求項１又は２記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the second casing is rotatable without load in the image forming apparatus. 前記第２の筐体は、前記定着部を通過した用紙の搬送ガイド部を兼ねることを特徴とする請求項１から３のいずれか一項記載の画像形成装置。
4. The image forming apparatus according to claim 1, wherein the second casing also serves as a conveyance guide unit for a sheet that has passed through the fixing unit. 5.
JP2006064922A 2006-03-09 2006-03-09 Image forming apparatus Expired - Fee Related JP4893030B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012078716A (en) * 2010-10-05 2012-04-19 Sharp Corp Fixing device and image forming apparatus

Citations (4)

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JPH05323814A (en) * 1992-05-19 1993-12-07 Ricoh Co Ltd Electrophotographic device
JP2002229363A (en) * 2001-01-31 2002-08-14 Kyocera Corp Fixing device for electrophotographic device
JP2002333808A (en) * 2001-04-26 2002-11-22 Nexpress Solutions Llc Device for manually opening and closing device housing
JP2004205534A (en) * 2001-12-18 2004-07-22 Ricoh Co Ltd Image forming apparatus, belt unit, and image forming system

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH05323814A (en) * 1992-05-19 1993-12-07 Ricoh Co Ltd Electrophotographic device
JP2002229363A (en) * 2001-01-31 2002-08-14 Kyocera Corp Fixing device for electrophotographic device
JP2002333808A (en) * 2001-04-26 2002-11-22 Nexpress Solutions Llc Device for manually opening and closing device housing
JP2004205534A (en) * 2001-12-18 2004-07-22 Ricoh Co Ltd Image forming apparatus, belt unit, and image forming system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012078716A (en) * 2010-10-05 2012-04-19 Sharp Corp Fixing device and image forming apparatus

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