JP2003167469A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JP2003167469A JP2003167469A JP2001365186A JP2001365186A JP2003167469A JP 2003167469 A JP2003167469 A JP 2003167469A JP 2001365186 A JP2001365186 A JP 2001365186A JP 2001365186 A JP2001365186 A JP 2001365186A JP 2003167469 A JP2003167469 A JP 2003167469A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- door
- image forming
- roller
- forming apparatus
- 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
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、未定着トナー画像
を加熱定着させるための定着装置を備えたプリンターや
複写機等の画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a printer or a copying machine equipped with a fixing device for heating and fixing an unfixed toner image.
【０００２】[0002]
【従来の技術】従来、プリンターや複写機等の画像形成
装置における定着装置はその内部に定着ローラ及び加圧
ローラと呼ばれる一対のローラ対を有しており、画像形
成装置の出荷時及び定着装置の生産時においては定着ロ
ーラあるいは加圧ローラの塑性変形を防止するためにロ
ーラ対の対向圧接（以下、加圧と言う）を解除した状態
で出荷されている。そのため画像形成装置を購入したユ
ーザーは自らがマニュアルに沿って加圧解除の状態を脱
する処置を行なっている。2. Description of the Related Art Conventionally, a fixing device in an image forming apparatus such as a printer and a copying machine has a pair of roller pairs called a fixing roller and a pressure roller inside the fixing device. At the time of production, in order to prevent plastic deformation of the fixing roller or the pressure roller, the roller pair is shipped with the opposed pressure contact (hereinafter referred to as pressure) released. Therefore, the user who purchases the image forming apparatus himself / herself takes a procedure for releasing the pressure release state according to the manual.
【０００３】また、近年においては装置本体の高寿命化
により定着装置をユーザーによるユニット交換の対象と
した製品が発売されてきており、ユーザーが定着装置の
加圧解除を脱する処置を行なう必要の度合いが増してき
ている。In recent years, due to the extension of the life of the main body of the apparatus, a product in which the fixing device is replaced by the user by the user has been put on the market, and it is necessary for the user to take a measure to release the pressure of the fixing device. The degree is increasing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、全ユー
ザーが画像形成装置を購入した際にマニュアルに沿って
加圧解除の状態を脱する処置を行なうことは完全に期待
できることではなく定着装置が加圧解除されたままの状
態で使用される可能性は少なくない。However, it is not completely expected that all users will follow the manual to release the pressure release state when they purchase the image forming apparatus, and the fixing device presses it. There is a high possibility that it will be used in the released state.
【０００５】更に定着装置のユニット交換によりユーザ
ーが定着装置の加圧解除を脱する処置を行なう度合いが
増せば前述の可能性は更に増してくる。Further, if the degree of the user performing the procedure for releasing the pressure release of the fixing device by the replacement of the fixing device unit is increased, the above-mentioned possibility is further increased.
【０００６】一方、定着ジャムにおけるジャム紙処理の
ため一時的に加圧解除を行なう場合が有り得るが、最悪
の場合は加圧解除されたままの状態で装置本体を復帰し
てしまうことが考えられる。On the other hand, there is a possibility that the pressure is temporarily released due to the jammed paper processing in the fixing jam, but in the worst case, it is possible that the apparatus main body is returned in the state where the pressure is released. .
【０００７】本来ならば、加圧解除された状態では本体
ドア等が閉まらない構成が望ましいが、装置本体出荷時
は運搬時の振動等を考慮し完全梱包されるためそのよう
な構造をとれないのが現状であった。Originally, it is desirable that the main body door and the like are not closed when the pressure is released, but when the main body of the apparatus is shipped, it is completely packaged in consideration of vibration during transportation and such a structure cannot be taken. It was the current situation.
【０００８】本発明の目的は、このような従来の問題に
鑑みなされたもので、画像形成装置本体の定着装置メイ
ンテナンス用扉を完全に閉じた状態にあっても定着装置
の加圧解除状態を維持でき、また定着装置の加圧解除状
態であっても画像形成装置本体の定着装置メインテナン
ス用の扉を閉めれば定着装置の加圧解除状態を脱するこ
とができ、さらに定着装置の加圧解除状態では画像形成
装置本体の定着装置メインテナンス用扉を完全に閉じる
ことができないようにする画像形成装置を提供しようと
するものである。The object of the present invention has been made in view of such a conventional problem. Even when the fixing device maintenance door of the image forming apparatus main body is completely closed, the pressure releasing state of the fixing device is maintained. Even if the pressure of the fixing device is released, the pressure release state of the fixing device can be released by closing the door for fixing device maintenance of the main body of the image forming apparatus. An object of the present invention is to provide an image forming apparatus that prevents the fixing device maintenance door of the main body of the image forming apparatus from being completely closed.
【０００９】[0009]
【課題を解決するための手段】第１の発明は、定着ロー
ラと加圧ローラを付勢手段により対向圧接させると共に
該圧接力を軽減あるいは解除させる加圧解除手段を有す
る定着装置と、前記加圧解除手段を操作可能とするため
に開放する画像形成装置本体に設けた扉とを有する画像
形成装置において、前記加圧解除手段は、前記定着ロー
ラと前記加圧ローラとが対向圧接された状態の第１位置
と圧接力を軽減または解除された状態の第２位置を選択
変位でき得るように操作可能なレバー部材を有し、前記
扉には、前記レバー部材が前記第２位置にある場合、前
記レバー部材と干渉して前記扉が完全に閉じないように
する干渉部材を設けたことを特徴とする。SUMMARY OF THE INVENTION A first invention is a fixing device having a pressure releasing means for bringing a fixing roller and a pressure roller into pressure contact with each other by a biasing means and for reducing or releasing the pressure contact force, and the above-mentioned addition device. In an image forming apparatus having a door provided in an image forming apparatus main body that is opened to enable operation of the pressure releasing means, the pressure releasing means has a state in which the fixing roller and the pressure roller are in pressure contact with each other. The first position and the second position in the state where the pressure contact force is reduced or released can be selectively displaced, and the door has the lever member in the second position. And an interference member that interferes with the lever member to prevent the door from being completely closed.
【００１０】第２の発明は、定着ローラと加圧ローラを
付勢手段により対向圧接させると共に該圧接力を軽減あ
るいは解除させる加圧解除手段を有する定着装置と、前
記加圧解除手段を操作可能とするために開放する画像形
成装置本体に設けた扉とを有する画像形成装置におい
て、前記加圧解除手段は、前記定着ローラと前記加圧ロ
ーラとが対向圧接された状態の第１位置と圧接力を軽減
または解除された状態の第２位置を選択変位でき得るよ
うに操作可能なレバー部材を有し、前記扉には、前記レ
バー部材が前記第２位置にある場合、前記扉の閉じ動作
に連動して前記レバー部材と当接しながら前記レバー部
材を前記第１位置に変位させる干渉部材を設けたことを
特徴とする。According to a second aspect of the present invention, a fixing device having a pressure releasing means for pressing the fixing roller and the pressure roller in opposition with each other by a biasing means and reducing or releasing the pressure contact force, and the pressure releasing means can be operated In the image forming apparatus having a door provided to the main body of the image forming apparatus, the pressure releasing means presses the fixing roller and the pressure roller to a first position in a state where they are pressed against each other. The door has a lever member operable to selectively displace the second position where the force is reduced or released, and the door has a closing action when the lever member is in the second position. An interfering member that displaces the lever member to the first position while interlocking with the lever member.
【００１１】第３の発明は、上記いずれかの発明で、前
記レバー部材が前記第２位置にある場合、前記干渉部材
が前記レバー部材との干渉を回避する位置に前記干渉部
材を退避させる退避手段を有することを特徴とする。A third aspect of the present invention is any one of the above-mentioned aspects, wherein when the lever member is in the second position, the retracting member retracts the interference member to a position where the interference member avoids interference with the lever member. It is characterized by having means.
【００１２】第４の発明は、上記第３の発明で、前記退
避手段は、前記扉の外部からの操作で前記干渉部材を回
動させて前記レバー部材との干渉を回避させることを特
徴とする。In a fourth aspect based on the third aspect, the retracting means rotates the interference member by an operation from the outside of the door to avoid interference with the lever member. To do.
【００１３】[0013]
【発明の実施の形態】（第１の実施の形態）図１から図
６は本発明の第１の実施の形態を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention.
【００１４】図１は本実施の形態の定着装置の主断面を
示し、図中、１と２は未定着トナー画像に定着作用を施
す定着ローラと加圧ローラで、共に内部に加熱手段であ
るハロゲンヒータ３を配置し、付勢手段である加圧ばね
４により対向圧接されてニップ部を形成する。未定着紙
Ｐはこのニップ部に挟持されることで定着作用を受け
る。FIG. 1 shows a main section of a fixing device according to the present embodiment. In the figure, 1 and 2 are a fixing roller and a pressure roller for fixing an unfixed toner image, both of which are heating means inside. A halogen heater 3 is arranged and is pressed against each other by a pressure spring 4 which is a biasing means to form a nip portion. The unfixed paper P is fixed by being sandwiched by the nip portion.
【００１５】５は未定着紙Ｐの先端をニップ部に案内す
る入口ガイド、６と７はニップ部を通過した既定着紙Ｐ
を下流方向に案内する排紙上ガイドと排紙下ガイド、８
は既定着紙Ｐがローラ表面に密着するのを防止する分離
爪、９と１０は既定着紙Ｐを定着装置外に受け渡すため
の排紙ローラと排紙コロで、それぞれ排紙下ガイド７と
排紙上ガイド６に回転可能に支持されており、排紙コロ
１０は図示せぬ付勢手段により排紙ローラ９に押圧され
ている。Reference numeral 5 is an inlet guide for guiding the leading end of the unfixed paper P to the nip portion, and 6 and 7 are predetermined fixed paper P passing through the nip portion.
Paper discharge upper guide and paper discharge lower guide, 8
Is a separation claw that prevents the preset paper P from coming into close contact with the roller surface, and 9 and 10 are paper discharge rollers and paper discharge rollers for delivering the default paper P to the outside of the fixing device. The sheet discharge upper guide 6 is rotatably supported, and the sheet discharge roller 10 is pressed against the sheet discharge roller 9 by a biasing means (not shown).
【００１６】１１は熱検知手段であるところのサーミス
タで定着ローラ１と加圧ローラ２の表面温度を常に略一
定に調整するためのものであり、１２は安全装置である
ところのサーモスイッチで、定着ローラまたは加圧ロー
ラ２の表面温度が異常昇温した場合にハロゲンヒータ３
への通電をカットするものである。Reference numeral 11 is a thermistor, which is a heat detecting means, for constantly adjusting the surface temperatures of the fixing roller 1 and the pressure roller 2 to be substantially constant, and 12 is a thermoswitch, which is a safety device. When the surface temperature of the fixing roller or the pressure roller 2 rises abnormally, the halogen heater 3
To cut off the power supply to.
【００１７】１３は加圧ばね４の付勢力に抗して定着ロ
ーラ１と加圧ローラ２との対向圧接を解除するための操
作部であるところの加圧解除レバー、１４ａ，１４ｂは
定着装置を手操作で装置本体に固定させるためのロック
レバーである。A pressure release lever 13 is an operation portion for releasing the opposed pressure contact between the fixing roller 1 and the pressure roller 2 against the urging force of the pressure spring 4, and 14a and 14b are fixing devices. It is a lock lever for manually fixing the to the device body.
【００１８】次に、図２により加圧解除の機構について
説明する。Next, the mechanism for releasing pressure will be described with reference to FIG.
【００１９】１５は加圧ローラ２の軸方向両端部に設け
られた加圧ステーで、加圧ローラ２の両端部をそれぞれ
ベアリング１６を介して回転自在に支持している。１７
は加圧解除軸１８の両端部にそれぞれ設けられた加圧解
除カムで、前記加圧ステー１５の上部にそれぞれ当接可
能となっている。加圧解除軸１８には加圧解除レバー１
３が取付けられており、加圧解除レバー１３を実線で示
す位置から破線で示す位置に向けて回動すると、加圧解
除カムのカム部がステー１５の下部に配置された加圧ば
ね４のばね力に抗して加圧ステー１５を図中下方に押し
下げ、加圧ローラ２と定着ローラ１との加圧を解除す
る。Numeral 15 is a pressure stay provided at both ends of the pressure roller 2 in the axial direction, and rotatably supports both ends of the pressure roller 2 via bearings 16, respectively. 17
Are pressure release cams provided at both ends of the pressure release shaft 18, respectively, and can come into contact with the upper portion of the pressure stay 15. The pressure release lever 18 is attached to the pressure release shaft 18.
3 is attached, and when the pressure release lever 13 is rotated from the position indicated by the solid line to the position indicated by the broken line, the cam portion of the pressure release cam of the pressure spring 4 arranged below the stay 15. The pressure stay 15 is pushed downward in the figure against the spring force, and the pressure between the pressure roller 2 and the fixing roller 1 is released.
【００２０】すなわち、加圧解除レバー１３は定着ロー
ラ１と加圧ローラ２とが加圧される状態（Ａ１位置）
と、定着ローラ１と加圧ローラ２の加圧解除がなされた
状態の（Ａ２位置）とを選択的に手動で切換え可能に構
成されている。そして、加圧解除レバー１３は、画像形
成装置本体の内部を開放する排紙ドア２７側に設けら
れ、加圧状態では水平方向に位置し、加圧解除状態では
斜め上方に傾斜している。That is, the pressure release lever 13 is in a state in which the fixing roller 1 and the pressure roller 2 are pressed (position A1).
And the fixing roller 1 and the pressure roller 2 in the state where the pressure is released (position A2) can be selectively switched manually. The pressure release lever 13 is provided on the side of the paper discharge door 27 that opens the inside of the image forming apparatus main body, is positioned in the horizontal direction in the pressure applied state, and is inclined obliquely upward in the pressure release state.
【００２１】さらに図３により定着装置の本体への装着
について説明する。Further, the mounting of the fixing device to the main body will be described with reference to FIG.
【００２２】まず、定着装置の両サイドに設けられてい
るスライド部１９ａ，１９ｂを装置本体側に設けられた
載せ台２０ａ，２０ｂ（図示せず）に載せ、そのまま押
し込むと定着装置は進行方向前部が下方に傾きながら位
置決めピン２１ａ，２１ｂが装置本体側のピン受け２２
ａ，２２ｂに挿入されつつ、その後スライド部１９ａ，
１９ｂが載せ台２０ａ，２０ｂを越えて定着装置全体が
下方に落ち込み、装置本体側の位置決め部２３ａ，２３
ｂに定着装置側の位置決め穴２４ａ，２４ｂが嵌合し位
置が決まる。First, the slide portions 19a and 19b provided on both sides of the fixing device are placed on the mounting bases 20a and 20b (not shown) provided on the main body of the device, and when they are pushed in as they are, the fixing device moves forward. The positioning pins 21a and 21b are attached to the pin receiver 22 on the main body of the apparatus while the parts are inclined downward.
While being inserted into the a and 22b, the slide portion 19a,
The entire fixing device 19b falls below the mounting bases 20a and 20b, and the positioning portions 23a and 23 on the main body side of the device.
Positioning holes 24a and 24b on the side of the fixing device are fitted in b to determine the position.
【００２３】最後にロックレバー１４ａ，１４ｂを所定
位置に回転させることで定着装置は装置本体に対して固
定される。定着装置への駆動入力は装置本体側の揺動ギ
ア列２５により定着装置側の入力ギア２６（図１記載）
に入力され図示せぬギア列により定着ローラ１と加圧ロ
ーラ２が駆動される。Finally, the fixing devices are fixed to the main body of the apparatus by rotating the lock levers 14a and 14b to predetermined positions. The drive input to the fixing device is the input gear 26 (shown in FIG. 1) on the fixing device side by means of the swing gear train 25 on the device body side.
The fixing roller 1 and the pressure roller 2 are driven by a gear train (not shown).
【００２４】図４は定着装置の着脱や定着ジャム処理時
に画像形成装置本体の内部を開放する排紙ドア２７を示
したものであり、２８は定着装置から排出される既定着
紙Ｐを図示せぬ装置本体排紙部まで案内する排紙ガイド
対、２９は定着装置側の加圧解除レバー１３に対して突
出するように設けられた干渉部材である。FIG. 4 shows a paper discharge door 27 which opens the inside of the main body of the image forming apparatus when the fixing device is attached / detached or a fixing jam process is performed. 28 is a default paper P discharged from the fixing device. A pair of paper discharge guides for guiding the paper to the paper discharge unit of the main body of the apparatus, 29 is an interference member provided so as to project with respect to the pressure release lever 13 on the fixing device side.
【００２５】排紙ドア２７はヒンジ部３０ａ，３０ｂ及
びダンパーバー３１ａ，３１ｂにより支持されており、
図示せぬ付勢手段により一方向に付勢された取っ手３２
の先端部に形成された爪３２ａにより装置本体側に固定
される。The paper discharge door 27 is supported by hinge portions 30a and 30b and damper bars 31a and 31b,
A handle 32 biased in one direction by a biasing means (not shown)
It is fixed to the main body of the apparatus by a claw 32a formed at the tip of the.
【００２６】次に、干渉部材２９の動作について説明す
る。Next, the operation of the interference member 29 will be described.
【００２７】図５は定着装置の加圧解除レバー１３と排
紙ドア２７に設けられた干渉部材２９との位置関係を示
した側面図である。FIG. 5 is a side view showing the positional relationship between the pressure release lever 13 of the fixing device and the interference member 29 provided on the paper discharge door 27.
【００２８】干渉部材２９は、コイルバネ３３で付勢さ
れた状態で排紙ドア２７に一端が突き当てられた状態で
回動可能に取り付けられている。The interference member 29 is rotatably attached with one end abutted against the paper discharge door 27 while being biased by the coil spring 33.
【００２９】ユーザーが定着ジャム処理あるいは定着ユ
ニットの交換等のため装置本体の排紙ドア２７を開放し
前述の作業が終了した後、定着装置側の加圧解除レバー
１３がＡ２位置にある場合、すなわち定着ローラ１と加
圧ローラ２とが加圧解除された状態にある場合に排紙ド
ア２７を閉めようとすると、排紙ドア２７に設けられた
干渉部材２９が傾斜している加圧解除レバー１３に干渉
して排紙ドア２７を完全に閉めることができないため、
ユーザーに加圧解除の状態を脱する作業を行なう必要が
あることを認識させることができる。ここで、加圧解除
レバー１３を水平の加圧状態に戻すと、干渉部材２９が
加圧解除レバー１３と干渉しなくなり、排紙ドア２７を
完全に閉めることができる。After the user opens the paper discharge door 27 of the apparatus main body for fixing jam processing or replacement of the fixing unit and the above-mentioned work is completed, when the pressure release lever 13 on the fixing apparatus side is in the A2 position, That is, when the fixing roller 1 and the pressure roller 2 are in a state where the pressure is released, when the paper discharge door 27 is closed, the interference member 29 provided on the paper discharge door 27 is inclined and the pressure is released. Since the output door 27 cannot be completely closed by interfering with the lever 13,
It is possible to let the user recognize that it is necessary to perform an operation to release the pressure release state. Here, when the pressure release lever 13 is returned to the horizontal pressure state, the interference member 29 does not interfere with the pressure release lever 13 and the paper discharge door 27 can be completely closed.
【００３０】さらに、図６に示すように、干渉部材２９
の位置に対向して排紙ドア２７に小径の貫通穴３４が設
けられており、この貫通穴３４に更に小径の棒材３５を
差し込むことにより干渉部材２９はコイルバネ３３のば
ね力に抗して加圧解除レバー１３と干渉する位置（Ｂ１
位置）から加圧解除レバー１３から退避した位置（Ｂ２
位置）へ移動可能であり、装置本体出荷時においては、
加圧解除レバー１３が傾斜した位置にある定着装置の加
圧解除状態であっても装置本体の排紙ドア２７を完全に
閉めた状態にすることが可能となる。前記棒材３５を貫
通穴３４から抜くと、干渉部材２９がコイルバネ３３の
ばね力で加圧解除レバー１３を図中時計方向に付勢する
ことになるが、この付勢方向は加圧解除方向でもあるの
で、加圧状態に戻るようなことはない。Further, as shown in FIG. 6, the interference member 29
A small-diameter through hole 34 is provided in the paper discharge door 27 so as to face the position of No. 3, and the interference member 29 resists the spring force of the coil spring 33 by inserting a smaller-diameter bar member 35 into the through-hole 34. The position where the pressure release lever 13 interferes (B1
Position (B2)
Position), and when the device is shipped,
Even when the pressure releasing lever 13 is in the inclined position and the fixing device is in the pressure released state, the paper discharge door 27 of the apparatus body can be completely closed. When the bar 35 is pulled out from the through hole 34, the interference member 29 urges the pressure release lever 13 in the clockwise direction in the figure by the spring force of the coil spring 33. This urging direction is the pressure release direction. However, it does not return to the pressurized state.
【００３１】（第２の実施の形態）図７および図８は本
発明の第２の実施の形態を示す。(Second Embodiment) FIGS. 7 and 8 show a second embodiment of the present invention.
【００３２】本実施の形態は装置本体の排紙ドア２７を
装置本体に対して閉める動作に連動させて定着装置の加
圧解除の状態を脱することを可能としたものである。In this embodiment, the pressure release state of the fixing device can be released by interlocking with the operation of closing the paper discharge door 27 of the device body with respect to the device body.
【００３３】図７、図８は本実施の形態に係る画像形成
装置に用いられる定着装置の加圧解除レバーと装置本体
側の排紙ドア２７に設けられた干渉部材との位置関係を
示した断面図で、３６は定着ローラ１と加圧ローラ２の
圧接状態を解除する加圧解除レバーで、干渉部材と当接
可能な先端部３６ａが略半円弧状に湾曲して形成されて
いる。３７は定着装置の加圧解除レバー３６に対向して
排紙ドア２７に設けられた干渉部材で、先端部３７ａが
傾斜面に形成されている。FIGS. 7 and 8 show the positional relationship between the pressure release lever of the fixing device used in the image forming apparatus according to this embodiment and the interference member provided on the discharge door 27 on the apparatus main body side. In the cross-sectional view, reference numeral 36 denotes a pressure release lever for releasing the pressure contact state between the fixing roller 1 and the pressure roller 2, and a tip end portion 36a capable of contacting the interference member is formed to be curved in a substantially semi-circular shape. An interference member 37 is provided on the paper discharge door 27 so as to face the pressure release lever 36 of the fixing device, and has a front end portion 37a formed on an inclined surface.
【００３４】加圧解除レバー３６は略垂直位置にある定
着ローラ１と加圧ローラ２とが加圧される状態（Ｃ１位
置）と、略４５°の下向きに傾斜した位置にある定着ロ
ーラ１と加圧ローラ２の加圧解除がなされた状態の（Ｃ
２位置）とを選択的に手動で切換え可能に構成されてお
り、前記Ｃ１位置から若干の遊び量をもって図示せぬサ
イドカバーに設けられたストッパー３８の位置で規制さ
れる。干渉部材３７は、コイルバネ３３で付勢された状
態で排紙ドア２７に一端が突き当てられた状態で回動可
能に取り付けられている。The pressure release lever 36 is in a state in which the fixing roller 1 and the pressure roller 2 are in a substantially vertical position and is pressed (C1 position), and the fixing roller 1 is in a downwardly inclined position of about 45 °. When the pressure of the pressure roller 2 is released (C
2 position) can be selectively switched manually, and is regulated by a position of a stopper 38 provided on a side cover (not shown) with a slight play amount from the C1 position. The interference member 37 is rotatably attached with one end abutted against the paper discharge door 27 while being biased by the coil spring 33.
【００３５】定着ジャム処理あるいは定着ユニットの交
換等のため装置本体の排紙ドア２７を開放し前述の作業
が終了した後、定着装置の加圧解除レバー３６がＣ２位
置にある状態で排紙ドア２７を閉めようとすると、干渉
部材３７の傾斜している先端面３７ａが加圧解除レバー
３６の湾曲した先端部３６ａと当接してくさび作用によ
りＣ１方向に向かって押し込むので、連動的に加圧解除
レバー３６はＣ１位置に変位される。After the paper ejecting door 27 of the apparatus main body is opened to fix the fixing jam or to replace the fixing unit and the above-mentioned work is completed, the pressure releasing lever 36 of the fixing device is in the C2 position, When the user tries to close 27, the inclined tip surface 37a of the interference member 37 comes into contact with the curved tip portion 36a of the pressure release lever 36 and pushes in the direction C1 by the wedge action. The release lever 36 is displaced to the C1 position.
【００３６】また、干渉部材３７の位置に対向して排紙
ドア２７に小径の貫通穴３４が設けられており、図８に
示すように、この貫通穴３４に更に小径の棒材３５を差
し込むことにより、干渉部材３７は加圧解除レバー３６
と干渉する位置（Ｄ１位置）から加圧解除レバー３６か
ら退避した位置（Ｄ２位置）へ移動可能であり、装置本
体出荷時においては定着装置が加圧解除された状態であ
っても装置本体の排紙ドア２７を完全に閉めた状態にす
ることが可能である。Further, a small-diameter through hole 34 is provided in the paper discharge door 27 so as to face the position of the interference member 37, and as shown in FIG. As a result, the interference member 37 becomes the pressure release lever 36.
It is possible to move from a position (D1 position) where it interferes with the pressure release lever 36 to a retracted position (D2 position). It is possible to completely close the paper discharge door 27.
【００３７】なお、上記した各実施の形態において、定
着ローラと加圧ローラとの加圧を解除した場合を例にし
ているが、加圧を軽減した場合であっても良い。In each of the above-described embodiments, the case where the pressure on the fixing roller and the pressure roller is released is taken as an example, but the case where the pressure is reduced may be used.
【００３８】[0038]
【発明の効果】以上説明したように、請求項１に係る本
発明によれば、定着装置の加圧状態が解除されたままで
は画像形成装置本体の扉が完全に閉じないので、ユーザ
ーに加圧解除の状態を脱する作業を行なう必要があるこ
とを認識させることができる。As described above, according to the first aspect of the present invention, the door of the main body of the image forming apparatus cannot be completely closed when the pressure applied to the fixing device is released. It is possible to recognize that it is necessary to perform an operation to release the pressure release state.
【００３９】請求項２に係る発明によれば、定着装置の
加圧状態が解除されていても、画像形成装置本体の扉の
閉じ動作に連動して定着装置を使用可能な加圧状態に自
動的に復帰させることができ、ユーザーに加圧解除の状
態を脱する作業を行なわせることが無くなった。According to the second aspect of the present invention, even when the pressure applied to the fixing device is released, the fixing device is automatically brought into a usable pressed condition in association with the closing operation of the door of the image forming apparatus main body. It is possible to recover the pressure, and it is no longer necessary for the user to perform the work of releasing the pressure release state.
【００４０】請求項３に係る発明によれば、装置本体出
荷時において、定着装置の加圧解除状態を維持して画像
形成装置本体側の扉を完全に閉めることを可能にした。According to the third aspect of the present invention, it is possible to completely close the door on the image forming apparatus body side while maintaining the pressure release state of the fixing device when the apparatus body is shipped.
【図１】本発明に係る第１の実施の形態における定着装
置の断面図FIG. 1 is a sectional view of a fixing device according to a first embodiment of the invention.
【図２】図１の定着装置の加圧解除機構の斜視図FIG. 2 is a perspective view of a pressure releasing mechanism of the fixing device of FIG.
【図３】図１の定着装置の装置本体への装着方法を示す
分解斜視図FIG. 3 is an exploded perspective view showing a mounting method of the fixing device shown in FIG.
【図４】本発明に係る第１の実施の形態における画像形
成装置の排紙ドア側の斜視図FIG. 4 is a perspective view of a paper discharge door side of the image forming apparatus according to the first embodiment of the present invention.
【図５】本発明に係る第１の実施の形態における干渉部
材と加圧解除レバーの位置関係を示す断面図FIG. 5 is a sectional view showing a positional relationship between an interference member and a pressure release lever according to the first embodiment of the present invention.
【図６】本発明に係る第１の実施の形態における加圧解
除レバーと干渉部材の位置関係を示す断面図FIG. 6 is a sectional view showing a positional relationship between a pressure release lever and an interference member according to the first embodiment of the present invention.
【図７】本発明に係る第２の実施の形態における定着装
置の加圧解除レバーと画像形成装置の干渉部材の位置関
係を示す断面図FIG. 7 is a sectional view showing a positional relationship between a pressure release lever of a fixing device and an interference member of an image forming apparatus according to a second embodiment of the invention.
【図８】本発明に係る第２の実施の形態における出荷時
での加圧解除レバーの位置に対する干渉部材の位置関係
を示す断面図FIG. 8 is a cross-sectional view showing the positional relationship of the interference member with respect to the position of the pressure release lever at the time of shipping in the second embodiment according to the invention.
１…定着ローラ ２…加圧ローラ ３…ハロゲンヒータ ４…加圧ばね ５…入口ガイド ６…排紙上ガイド ７…排紙下ガイド ８…分離爪 ９…排紙ローラ １０…排紙コロ １１…熱検知手段（サーミスタ） １２…安全装置（サーモスイッチ） １３…加圧解除レバー １４ａ，１４ｂ…ロックレバー １５…加圧ステー １６…ベアリング １７…加圧解除カム １８…加圧解除軸 １９ａ，１９ｂ…スライド部 ２０ａ，２０ｂ…載せ台 ２１ａ，２１ｂ…位置決めピン ２２ａ，２２ｂ…ピン受け ２３ａ、２３ｂ…位置決め部 ２４ａ，２４ｂ…位置決め穴 ２５…揺動ギア列 ２６…入力ギア ２７…排紙ドア ２８…排紙ガイド対 ２９…干渉部材 ３０ａ，３０ｂ…ヒンジ部 ３１ａ，３１ｂ…ダンパーバー ３２…取っ手 ３２ａ…爪 ３３…コイルバネ ３４…貫通穴 ３５…棒材 ３６…加圧解除レバー ３７…干渉部材 ３８…ストッパー 1 ... Fixing roller 2 ... Pressure roller 3 ... Halogen heater 4 ... Pressure spring 5 ... Entrance guide 6 ... Paper ejection guide 7 ... Paper ejection guide 8 ... Separation claw 9 ... Ejection roller 10 ... Paper ejection roller 11 ... Heat detection means (thermistor) 12 ... Safety device (thermo switch) 13 ... Pressure release lever 14a, 14b ... Lock lever 15 ... Pressure stay 16 ... Bearing 17 ... Pressure release cam 18 ... Pressure release shaft 19a, 19b ... slide part 20a, 20b ... Stand 21a, 21b ... Positioning pins 22a, 22b ... Pin receiver 23a, 23b ... Positioning unit 24a, 24b ... Positioning holes 25 ... Oscillating gear train 26 ... Input gear 27 ... Paper exit door 28 ... Pair of paper ejection guides 29 ... Interference member 30a, 30b ... Hinge part 31a, 31b ... Damper bar 32 ... Handle 32a ... nail 33 ... Coil spring 34 ... Through hole 35 ... bar 36 ... Pressure release lever 37 ... Interference member 38 ... Stopper
Claims (4)
り対向圧接させると共に該圧接力を軽減あるいは解除さ
せる加圧解除手段を有する定着装置と、前記加圧解除手
段を操作可能とするために開放する画像形成装置本体に
設けた扉とを有する画像形成装置において、 前記加圧解除手段は、前記定着ローラと前記加圧ローラ
とが対向圧接された状態の第１位置と圧接力を軽減また
は解除された状態の第２位置を選択変位でき得るように
操作可能なレバー部材を有し、前記扉には、前記レバー
部材が前記第２位置にある場合、前記レバー部材と干渉
して前記扉が完全に閉じないようにする干渉部材を設け
たことを特徴とする画像形成装置。1. A fixing device having a pressure releasing means for pressing a fixing roller and a pressure roller against each other by a biasing means and reducing or releasing the pressure contact force, and for enabling the pressure releasing means to be operable. In the image forming apparatus having a door provided on the main body of the image forming apparatus to be opened, the pressure releasing means reduces the pressure contact force with the first position in a state where the fixing roller and the pressure roller are in pressure contact with each other, or The door has a lever member operable to selectively displace the second position in the released state, and the door interferes with the lever member when the lever member is in the second position. An image forming apparatus, characterized in that an interference member is provided to prevent the sheet from completely closing.
り対向圧接させると共に該圧接力を軽減あるいは解除さ
せる加圧解除手段を有する定着装置と、前記加圧解除手
段を操作可能とするために開放する画像形成装置本体に
設けた扉とを有する画像形成装置において、 前記加圧解除手段は、前記定着ローラと前記加圧ローラ
とが対向圧接された状態の第１位置と圧接力を軽減また
は解除された状態の第２位置を選択変位でき得るように
操作可能なレバー部材を有し、前記扉には、前記レバー
部材が前記第２位置にある場合、前記扉の閉じ動作に連
動して前記レバー部材と当接しながら前記レバー部材を
前記第１位置に変位させる干渉部材を設けたことを特徴
とする画像形成装置。2. A fixing device having a pressure releasing means for pressing the fixing roller and the pressure roller in opposition with each other by a biasing means and for reducing or releasing the pressure contact force, and for enabling the pressure releasing means to be operable. In the image forming apparatus having a door provided on the main body of the image forming apparatus to be opened, the pressure releasing means reduces the pressure contact force with the first position in a state where the fixing roller and the pressure roller are in pressure contact with each other, or The door has a lever member operable to selectively displace the second position in the released state, and the door is interlocked with the closing operation of the door when the lever member is in the second position. An image forming apparatus comprising an interference member that displaces the lever member to the first position while contacting the lever member.
合、前記干渉部材が前記レバー部材との干渉を回避する
位置に前記干渉部材を退避させる退避手段を有すること
を特徴とする請求項１または２に記載の画像形成装置。3. The retraction means for retracting the interference member to a position where the interference member avoids interference with the lever member when the lever member is in the second position. Alternatively, the image forming apparatus described in 2.
作で前記干渉部材を回動させて前記レバー部材との干渉
を回避させることを特徴とする請求項３に記載の画像形
成装置。4. The image forming apparatus according to claim 3, wherein the retracting unit rotates the interference member by an operation from the outside of the door to avoid interference with the lever member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001365186A JP2003167469A (en) | 2001-11-29 | 2001-11-29 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001365186A JP2003167469A (en) | 2001-11-29 | 2001-11-29 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003167469A true JP2003167469A (en) | 2003-06-13 |
Family
ID=19175247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001365186A Pending JP2003167469A (en) | 2001-11-29 | 2001-11-29 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003167469A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1640812A3 (en) * | 2004-09-22 | 2006-09-27 | Seiko Epson Corporation | Image forming apparatus having a detachable double-sided printing unit |
| JP2010224093A (en) * | 2009-03-23 | 2010-10-07 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
| US20120082478A1 (en) * | 2010-09-30 | 2012-04-05 | Brother Kogyo Kabushiki Kaisha | Image Forming Apparatus |
| US8620183B2 (en) | 2008-10-16 | 2013-12-31 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
-
2001
- 2001-11-29 JP JP2001365186A patent/JP2003167469A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1640812A3 (en) * | 2004-09-22 | 2006-09-27 | Seiko Epson Corporation | Image forming apparatus having a detachable double-sided printing unit |
| US7460826B2 (en) | 2004-09-22 | 2008-12-02 | Seiko Epson Corporation | Image forming apparatus |
| US8620183B2 (en) | 2008-10-16 | 2013-12-31 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
| JP2010224093A (en) * | 2009-03-23 | 2010-10-07 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
| US20120082478A1 (en) * | 2010-09-30 | 2012-04-05 | Brother Kogyo Kabushiki Kaisha | Image Forming Apparatus |
| US8509654B2 (en) * | 2010-09-30 | 2013-08-13 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having mechanism for placing fixing unit in nip relaxed state |
| US8693918B2 (en) | 2010-09-30 | 2014-04-08 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having mechanism for placing fixing unit in nip relaxed state |
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