JPH05341687A - Sheet of paper carrying device for image forming device - Google Patents
Sheet of paper carrying device for image forming deviceInfo
- Publication number
- JPH05341687A JPH05341687A JP4152161A JP15216192A JPH05341687A JP H05341687 A JPH05341687 A JP H05341687A JP 4152161 A JP4152161 A JP 4152161A JP 15216192 A JP15216192 A JP 15216192A JP H05341687 A JPH05341687 A JP H05341687A
- Authority
- JP
- Japan
- Prior art keywords
- fixing
- unit
- sheet
- paper
- roller
- 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.)
- Granted
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、画像形成装置の定着後
の用紙搬送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device after fixing an image forming apparatus.
【0002】[0002]
【従来の技術】小型のレーザプリンタや電子写真複写機
等の画像形成装置では、保守、部品交換や、ジャム紙の
除去等の処理を容易にする目的で、装置本体を上ユニッ
トと下ユニットとより構成し、上下ユニットを一端縁部
で互いに枢着し、その反対側で上ユニットを跳ね上げて
大きく口を開くようにした、いわゆるクラムシェル型の
機器が採用されている。2. Description of the Related Art In a small-sized image forming apparatus such as a laser printer or an electrophotographic copying machine, an apparatus main body is divided into an upper unit and a lower unit for the purpose of facilitating maintenance, replacement of parts, and removal of jammed paper. A so-called clamshell type device is adopted in which the upper and lower units are pivotally attached to each other at one edge, and the upper unit is flipped up on the opposite side to open a large mouth.
【0003】図9は、クラムシェル型のレーザプリンタ
の一例の全体構成を示す図である。プリンタ本体10は
鎖線X−Xを境にして、下ユニット10aと上ユニット
10bとに分割され、定着装置18の排紙側端部に設け
られた軸28で上下ユニット10b、10aは互いに枢
着され、その反対側、つまり図において右側で上ユニッ
ト10bを鎖線で示す10b’の位置に跳ね上げて、大
きく口を開くことができるようになっている。FIG. 9 is a diagram showing the overall construction of an example of a clamshell type laser printer. The printer body 10 is divided into a lower unit 10a and an upper unit 10b with a chain line XX as a boundary, and the upper and lower units 10b and 10a are pivotally attached to each other by a shaft 28 provided at an end of the fixing device 18 on the sheet discharge side. On the opposite side, that is, on the right side in the drawing, the upper unit 10b can be flipped up to the position of 10b 'shown by the chain line to open the mouth greatly.
【0004】上ユニット10bには、無端ベルト状感光
体ユニット13、帯電チャージャ14、レーザ書込光学
系15、現像器16、クリーニング器20が設けられ、
外装カバーの頂板上面に排紙受け19が形成されてい
る。The upper unit 10b is provided with an endless belt type photoconductor unit 13, a charging charger 14, a laser writing optical system 15, a developing device 16 and a cleaning device 20.
A paper discharge receiver 19 is formed on the top surface of the top plate of the exterior cover.
【0005】下ユニット10aの下部には給紙カセット
11が設けられ、その上部にはレジストローラ対12、
転写チャージャ17、定着装置18が設けられている。A paper feed cassette 11 is provided below the lower unit 10a, and a pair of registration rollers 12 are provided above the paper feed cassette 11.
A transfer charger 17 and a fixing device 18 are provided.
【0006】給紙カセット11から矢印イの方向に給送
された用紙50は、レジストローラ対12によってタイ
ミングを取って、無端ベルト感光体13に給送され、帯
電チャージャ14による一様帯電、レーザ書込光学系1
5による光書込み、現像器16による感光体13上に形
成されたトナー像は、転写チャージャ17の作用のもと
に用紙に転写され、定着装置18により定着される。The sheet 50 fed from the sheet feeding cassette 11 in the direction of arrow A is fed to the endless belt photosensitive member 13 by the registration roller pair 12 at a certain timing, and is uniformly charged by the charging charger 14 and laser. Writing optical system 1
The toner image formed on the photoconductor 13 by the optical writing by 5 and the developing device 16 is transferred onto the sheet by the action of the transfer charger 17, and is fixed by the fixing device 18.
【0007】定着装置18は、ヒータを内蔵した定着ロ
ーラ21とこれに圧接する加圧ローラよりなる熱ローラ
定着装置であって、定着後の用紙は、定着ローラに先端
が当接する分離爪30により定着ローラ21より剥離さ
れ、定着後排紙ローラ22とこれに圧接従動する従動ロ
ーラ24とにより、定着後の用紙搬送路を搬送される。The fixing device 18 is a heat roller fixing device comprising a fixing roller 21 having a built-in heater and a pressure roller which comes into pressure contact with the fixing roller 21, and the sheet after fixing is separated by a separating claw 30 whose tip abuts against the fixing roller. The sheet is separated from the fixing roller 21, and is conveyed through the sheet conveyance path after fixing by the sheet discharge roller 22 after fixing and the driven roller 24 that is pressed and driven by the sheet discharge roller 22.
【0008】図に示すプリンタの例では、排紙部は前記
の上ユニットの頂部に設けられた排紙受け19の他に、
定着装置18の排紙側より偏向せずに排出される排紙受
け19’が設けられており、切換爪41により排出方向
が選択的に切換えられるようになっている。In the example of the printer shown in the figure, the paper discharge section is provided in addition to the paper discharge tray 19 provided at the top of the upper unit.
A paper discharge receiver 19 ′ that is discharged without being deflected from the paper discharge side of the fixing device 18 is provided, and the discharge direction can be selectively switched by the switching claw 41.
【0009】上側の排紙受け19に用紙を排出する場合
は、用紙は上ユニット内に形成された反転搬送路を経
て、上排紙ローラ40より矢印口で示す方向に排出さ
れ、下側の排紙受け19’に排紙する場合は、切換爪4
1の上流側に設けられた下排紙ローラ23とその従動ロ
ーラ25とにより、矢印ハの方向に排紙受け19’へ排
出される。下排紙ローラ23は上側排紙受け19に排紙
する場合は搬送ローラとして働らく。When the sheet is discharged to the upper sheet discharge tray 19, the sheet is discharged from the upper sheet discharge roller 40 in the direction indicated by the arrow through the reverse conveyance path formed in the upper unit, and then the sheet is discharged to the lower side. When the paper is discharged to the paper receiver 19 ', the switching claw 4
By the lower paper discharge roller 23 provided on the upstream side of 1 and the driven roller 25, the paper is discharged to the paper discharge receiver 19 ′ in the direction of arrow C. The lower paper discharge roller 23 functions as a transport roller when the paper is discharged to the upper paper discharge receiver 19.
【0010】さて、上記構成の熱ローラ定着装置を有す
る画像形成装置では、定着器内部又は定着後にジャムが
発生した場合、ジャム紙の除去、分離爪の交換のため、
分離爪や上下の搬送ガイド、定着後排紙ローラ対を開放
することが必要である。その手段として、例えば実開昭
60−150571号公報には、図10に示す如く、定
着ローラ21から定着後排紙ローラ22迄の上下のガイ
ド部材42、43、分離爪30及び定着後排紙ローラ対
22、24を定着装置の排出側で機枠に枢着された1つ
の部材44に一体的に取付け、この部材を枢着軸44a
のまわりに回動させることにより、分離爪30が定着ロ
ーラ21に圧接し、ガイド部材42、43、定着後排紙
ローラ対22、24が所定の作動位置にくる状態と、図
10に示す如く一体となって定着器より離れガイド部材
42、43が口を開きうる状態との間に変位可能となる
構成の定着器分離爪解除装置が開示されている。特開平
2−234179号公報、実開昭60−168158号
公報にもほゞ同様の機構が示されている。In the image forming apparatus having the heat roller fixing device having the above structure, when a jam occurs inside the fixing device or after fixing, the jammed paper is removed and the separation claw is replaced.
It is necessary to open the separation claw, the upper and lower conveyance guides, and the pair of paper ejection rollers after fixing. As means for this, for example, in Japanese Utility Model Laid-Open No. 60-150571, as shown in FIG. 10, upper and lower guide members 42 and 43 from the fixing roller 21 to the post-fixing paper discharge roller 22, the separation claw 30, and the post-fixing paper discharge. The pair of rollers 22 and 24 are integrally attached to one member 44 pivotally attached to the machine frame on the discharge side of the fixing device, and this member is attached to a pivot shaft 44a.
When the separation claw 30 is brought into pressure contact with the fixing roller 21 by rotating it around, the guide members 42 and 43 and the post-fixing discharge roller pair 22 and 24 come to a predetermined operating position, as shown in FIG. There is disclosed a fixing device separating claw releasing device which is configured so as to be disengaged from the fixing device and movable when the guide members 42 and 43 can open their mouths. Japanese Patent Application Laid-Open No. 2-234179 and Japanese Utility Model Application Laid-Open No. 60-168158 disclose almost the same mechanism.
【0011】しかし、このような構成のジャム処理機構
は、現像器側の端部又は装置の奥側に枢着軸が設けられ
たクラムシェル型の装置では、支障なくジャム処理がで
きるものと考えられるが、図9に示すように定着装置の
排出側の端部に枢着軸があるクラムシェル型の画像形成
装置では、定着装置の下流側での上下ユニットの開きが
小さくなり、分離爪、ガイド部材、定着後排紙ローラ対
を一体に設けた取付け部材44を起倒する動作がやりに
くゝ、又倒した状態でも分離爪や取付部材、ガイド部材
等がじゃまになってジャム紙を除去したり分離爪を交換
する動作が非常にしにくいという不具合がある。However, it is considered that the jam processing mechanism having such a structure can carry out the jam processing without any trouble in the clamshell type apparatus in which the pivot shaft is provided at the end portion on the developing device side or the back side of the apparatus. However, as shown in FIG. 9, in the clamshell type image forming apparatus having a pivot shaft at the discharge side end of the fixing device, the opening of the upper and lower units on the downstream side of the fixing device becomes small, and the separation claw, It is difficult to raise and lower the guide member and the mounting member 44 integrally provided with the pair of post-fixing paper discharge rollers, and even when the guide member is tilted, the separation claws, the mounting member, the guide member, etc. interfere with the jammed paper. There is a problem that it is very difficult to remove or replace the separation claw.
【0012】[0012]
【発明が解決しようとする課題】本発明は、上下ユニッ
トの枢着軸が定着装置の排出側端部にあるクラムシェル
型の画像形成装置の従来の用紙搬送装置の上記の不具合
を解消した、ジャム処理作業や分離爪の交換作業が容易
な用紙搬送装置を提供することを課題とする。SUMMARY OF THE INVENTION The present invention has solved the above-mentioned problems of the conventional sheet conveying device of the clamshell type image forming apparatus in which the pivotal shaft of the upper and lower units is at the discharge side end of the fixing device. An object of the present invention is to provide a paper transporting device that facilitates jam clearance work and separation nail replacement work.
【0013】[0013]
【課題を解決するための手段】本発明は、上記の課題を
解決するため、熱ローラ定着装置の排紙側の装置端部に
位置するヒンジにより開閉可能に枢着された上下ユニッ
トより成る画像形成装置の定着後の用紙搬送路の上記上
ユニット内の部分が上ユニット外装カバーの内面に形成
された第1ガイド部と、上ユニットの機枠に取付けられ
た排紙ユニットに形成され、上記の第1ガイド部のガイ
ド面と間隔を置いて対置されたガイド面を有する第2ガ
イド部とにより構成されている用紙搬送装置において、
上記の排紙ユニットに上記第2ガイド部の上ユニット内
の部分に円滑に接続され上下ユニットの閉鎖状態でその
一部が熱ローラ定着装置の内部に入り込み、下ユニット
に設けられた下側ガイド部と共働して定着後の用紙の上
ユニット内の搬送路迄の用紙搬送路を形成し上下ユニッ
トの開放状態で上記下側ガイド部より離間し、その先端
が定着装置内より退避する部分を設けたことを特徴とす
る。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is an image composed of an upper and lower unit pivotally mounted to be openable and closable by a hinge located at the end of the heat roller fixing device on the paper discharge side. The portion of the sheet conveying path after fixing of the forming device in the upper unit is formed in the first guide portion formed on the inner surface of the upper unit exterior cover and the sheet discharge unit attached to the machine frame of the upper unit. A sheet guide device including a guide surface of the first guide portion and a second guide portion having a guide surface opposed to the first guide portion at a distance,
The paper discharge unit is smoothly connected to a portion inside the upper unit of the second guide portion, and a part of the upper guide unit enters the inside of the heat roller fixing device when the upper and lower units are closed. A part that cooperates with the above part to form a sheet conveyance path up to the conveyance path in the upper unit of the sheet after fixing, and is separated from the lower guide section with the upper and lower units open, and the tip of which retracts from the fixing device. Is provided.
【0014】[0014]
【作用】上記のごとく、上下ユニットの枢着軸が定着装
置の排出側の装置端部にあるので、装置の上ユニットを
開くことにより、第2ガイド部の上ユニット下端より定
着装置の方に延長した部分は、下ユニットの下側ガイド
部との間隔が大きく開き、ジャム処理や分離爪交換が容
易になる。As described above, since the pivot shafts of the upper and lower units are located at the ejecting end of the fixing device, by opening the upper unit of the device, the fixing unit is moved toward the fixing device from the lower end of the upper unit of the second guide portion. The extended portion has a large gap between it and the lower guide portion of the lower unit, which facilitates jam processing and separation claw replacement.
【0015】第2ガイド部の定着装置の方に延長した部
分に分離爪及び下ユニットに設けられた排紙ローラの従
動ローラを、上下ユニットを閉じた状態で所定の作動位
置にくるように設けたならば、上ユニットを開いた時に
これらは第2ガイド部材とともに移動して、当接する相
手方との間隔が大きく開くので、ジャム処理操作及び分
離爪の交換作業は一そう容易になる。A separating claw and a driven roller of a paper discharge roller provided in the lower unit are provided at a portion of the second guide portion extending toward the fixing device so as to come to a predetermined operating position with the upper and lower units closed. In this case, when the upper unit is opened, they move together with the second guide member, and a gap between the other unit with which they abut is widened, so that the jam clearance operation and the separation claw replacement work become much easier.
【0016】上記以外の本発明の課題及びそれを解決す
る手段は、以下に図面を参照して詳細に説明する実施例
の説明により明らかにされるであろう。The problems of the present invention and the means for solving the same other than the above will be made clear by the description of the embodiments described in detail below with reference to the drawings.
【0017】[0017]
【実施例】以下に本発明の実施例を図面に基づいて詳細
に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【0018】図1はさきに図9で説明したレーザプリン
タ10に本発明を適用した実施例の全体構成の上ユニッ
ト10bを開いた状態を示す図である。その定着装置か
ら後の用紙搬送装置を拡大して図2に示す。FIG. 1 is a diagram showing a state in which an upper unit 10b of the entire structure of an embodiment to which the present invention is applied to the laser printer 10 described in FIG. 9 is opened. FIG. 2 is an enlarged view of the sheet conveying device after the fixing device.
【0019】定着後の用紙の上側排紙受け19への搬送
経路は、上ユニット10bの外装カバー27の内面に形
成された複数のリブより成りそれらの端縁により案内面
が形成される第1ガイド部27aと、上ユニットのフレ
ーム29に取付られた耐熱性樹脂で成型された排紙ユニ
ット26に形成され第1ガイド部の案内面と間隔を置い
た案内面を端縁によって形成する複数のリブより成る第
2ガイド部26bとより成る。この点は従来の画像形成
装置と変るところはない。The conveying path of the sheet after fixing to the upper sheet discharge receiver 19 is composed of a plurality of ribs formed on the inner surface of the outer cover 27 of the upper unit 10b, and a first guide surface is formed by their edges. A plurality of guide portions 27a and a plurality of guide surfaces formed by heat-resistant resin attached to the frame 29 of the upper unit and formed on the discharge unit 26 and spaced apart from the guide surface of the first guide portion are formed by edges. It is composed of a second guide portion 26b composed of a rib. This point is no different from the conventional image forming apparatus.
【0020】しかし、本発明の実施例では、第2ガイド
部26bは、上ユニット10bの内部の部分に円滑に接
続して、上下ユニットの閉鎖状態で、図3に示す如く定
着装置18の内部に先端が入り込み、定着ローラ21と
加圧ローラとのニップ部より排出された用紙を、下ユニ
ットに設けられた下ガイドと共動して案内する部分が設
けられている。図3に示す定着ローラ21と第2ガイド
部26bの定着器内に入り込んだ部分26aの先端との
間隔Aは0.5〜10mmとすれば、図10に示したガ
イド部材42を省略することができる。However, in the embodiment of the present invention, the second guide portion 26b is smoothly connected to the inner portion of the upper unit 10b, and when the upper and lower units are closed, as shown in FIG. There is provided a portion for guiding the sheet discharged from the nip portion between the fixing roller 21 and the pressure roller in cooperation with the lower guide provided in the lower unit, the leading end of which enters the sheet. If the distance A between the fixing roller 21 shown in FIG. 3 and the tip of the portion 26a of the second guide portion 26b that has entered the fixing device is 0.5 to 10 mm, the guide member 42 shown in FIG. 10 can be omitted. You can
【0021】分離爪30と、その爪先を定着ローラに当
接させる加圧スプリング34は、図4、図5に示すよう
に第2ガイド部26bの定着装置内への侵入部26aの
先端に着脱自在に装着されている。分離爪30の爪先が
定着ローラ21に当接する点及び分離爪の用紙案内面
は、定着ローラ21と加圧ローラによる通紙面よりも高
くすれば、用紙は円滑に搬送される。As shown in FIGS. 4 and 5, the separation claw 30 and the pressure spring 34 for bringing the tip of the separation claw into contact with the fixing roller are attached to and detached from the tip of the intrusion part 26a of the second guide part 26b into the fixing device. It is installed freely. If the point where the tip of the separation claw 30 abuts the fixing roller 21 and the sheet guide surface of the separation claw are made higher than the sheet passing surface of the fixing roller 21 and the pressure roller, the sheet is smoothly conveyed.
【0022】図1に示す如く、上ユニット10bを枢着
軸28を中心として跳ね上げた開いた場合、定着器18
の内部が侵入していた第2ガイド部26bは定着部18
から退避し、分離爪30も定着ローラ21から大きく離
間する。したがって、分離爪30及びスプリング34の
交換ジャム紙の除去は容易に行ないうる。As shown in FIG. 1, when the upper unit 10b is flipped up around the pivot shaft 28 and opened, the fixing device 18
The second guide portion 26b into which the inside of the
The separation claw 30 is also largely separated from the fixing roller 21. Therefore, the replacement jam paper of the separation claw 30 and the spring 34 can be easily removed.
【0023】なお、第2ガイド部の先端部26a及び分
離爪が定着装置18内に円滑に出入しうるように、定着
装置ハウジング33には図6に示す如く、通過用切り欠
き33aを所要の位置に設けることが必要である。As shown in FIG. 6, the fixing device housing 33 has a passage notch 33a so that the tip end portion 26a of the second guide portion and the separating claw can be smoothly moved in and out of the fixing device 18. It is necessary to install it in the position.
【0024】図1及び図2に示す如く、下ユニット10
aに設けられた定着後排紙ローラ22及び下排紙ローラ
25の夫々に対する従動ローラ24、25を排紙ユニッ
ト26に取付けたならば、上ユニット10bの開放によ
り、これらの従動ローラ24、25も夫々の相手のロー
ラ22、23から大きく離間し、ジャム紙の除去が一層
容易になる。As shown in FIGS. 1 and 2, the lower unit 10
When the driven rollers 24 and 25 for the post-fixing paper discharge roller 22 and the lower paper discharge roller 25 provided in a are attached to the paper discharge unit 26, the upper unit 10b is opened to drive these driven rollers 24 and 25. Is greatly separated from the rollers 22 and 23 of the respective counterparts, and it becomes easier to remove the jammed paper.
【0025】ジャムの発生を検知するため、図7に示す
如く、上排紙ローラ40及び下排紙ローラ23の上流側
直近に夫々上排紙ジャムセンサ32及び下排紙ジャムセ
ンサ31が排紙ユニット26に取付けられる。これらの
センサ32、31は図8に示す如く、排紙ユニット26
の所定の位置にあらかじめ設けられた取付ソケット孔3
5にセンサの端子を兼ねる取付足を挿し込んで係止する
ようにすれば着脱配線が容易になる。In order to detect the occurrence of a jam, as shown in FIG. 7, the upper paper ejection jam sensor 32 and the lower paper ejection jam sensor 31 are ejected near the upstream side of the upper paper ejection roller 40 and the lower paper ejection roller 23, respectively. It is attached to the unit 26. These sensors 32 and 31 are, as shown in FIG.
Mounting socket hole 3 provided in advance at a predetermined position of
If the mounting foot that also serves as the terminal of the sensor is inserted into 5 and locked, the attachment / detachment wiring becomes easy.
【0026】[0026]
【発明の効果】以上の如く、本発明によれば、定着装置
排紙側端部にヒンジを有するクラムシェル型の画像形成
装置において、定着後のジャム紙の処理及び定着ローラ
から用紙を剥離する分離爪の交換が容易になる。As described above, according to the present invention, in a clamshell type image forming apparatus having a hinge at the discharge side end of the fixing device, the jammed paper is fixed and the paper is peeled from the fixing roller. The separation claw can be easily replaced.
【図1】本発明の実施例のクラムシェル型画像形成装置
の全体構成を示す上ユニットを開いた状態の断面図であ
る。FIG. 1 is a cross-sectional view showing an entire configuration of a clamshell type image forming apparatus of an embodiment of the present invention with an upper unit opened.
【図2】その定着後の用紙搬送装置を拡大して示す断面
図である。FIG. 2 is an enlarged cross-sectional view of the sheet conveyance device after fixing.
【図3】その排紙ユニットに設けられた第2ガイド部の
定着装置内に侵入した端部と定着ローラとの位置関係を
説明する断面図である。FIG. 3 is a cross-sectional view illustrating a positional relationship between an end portion of a second guide portion provided in the paper discharge unit that has entered the fixing device and a fixing roller.
【図4】上記第2ガイド部の上記端部に分離爪及びその
スプリングを取付けた状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which a separation claw and its spring are attached to the end portion of the second guide portion.
【図5】その分解斜視図である。FIG. 5 is an exploded perspective view thereof.
【図6】定着装置ハウジングに設けられた分離爪通過用
切欠きを示す斜視図である。FIG. 6 is a perspective view showing a separation claw passage notch provided in the fixing device housing.
【図7】上排紙ジャムセンサ及び下排紙ジャムセンサの
配置を示す断面図である。FIG. 7 is a cross-sectional view showing an arrangement of an upper paper ejection jam sensor and a lower paper ejection jam sensor.
【図8】ジャムセンサとその取付け部を示す分解斜視図
である。FIG. 8 is an exploded perspective view showing a jam sensor and its mounting portion.
【図9】公知のクラムシェル型のレーザプリンタの一例
の全体概略構成を示す断面図である。FIG. 9 is a sectional view showing an overall schematic configuration of an example of a known clamshell type laser printer.
【図10】従来の定着装置の分離爪、排紙ガイド部材、
定着後排紙ローラ対の定着ローラからの退避機構を示す
側断面図である。FIG. 10 is a separation claw of a conventional fixing device, a discharge guide member,
FIG. 6 is a side sectional view showing a retracting mechanism of a post-fixing paper discharge roller pair from a fixing roller.
10 画像形成装置 10a 下ユニット 10b 上ユニット 18 熱ローラ定着装置 21 定着ローラ 22 定着後排紙ローラ 23 下排紙ローラ 24、25 従動ローラ 26 排紙ユニット 26a 第2ガイド部の定着装置内への侵入部 26b 第2ガイド部 27 上ユニット外装カバー 27a 第1ガイド部 28 ヒンジ 29 上ユニットフレーム 30 分離爪 31 下排紙ジャムセンサ 32 上排紙ジャムセンサ 35 ジャムセンサ取付用ソケット穴 40 上排紙ローラ 41 排紙方向切換爪 10 Image Forming Device 10a Lower Unit 10b Upper Unit 18 Heat Roller Fixing Device 21 Fixing Roller 22 Fixing Paper Ejection Roller 23 Lower Paper Ejection Roller 24, 25 Driven Roller 26 Paper Ejection Unit 26a Penetration of the second guide into the fixing device Part 26b Second guide part 27 Upper unit exterior cover 27a First guide part 28 Hinge 29 Upper unit frame 30 Separation claw 31 Lower ejection jam sensor 32 Upper ejection jam sensor 35 Socket hole for mounting jam sensor 40 Upper ejection roller 41 Output direction switching claw
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 G03G 15/00 110 7369−2H 112 7369−2H ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location G03G 15/00 110 7369-2H 112 7369-2H
Claims (5)
位置するヒンジにより開閉可能に枢着された上下ユニッ
トより成る画像形成装置の定着後の用紙搬送路の上記上
ユニット内の部分が上ユニット外装カバーの内面に形成
された第1ガイド部と、上ユニットの機枠に取付けられ
た排紙ユニットに形成され、上記の第1ガイド部のガイ
ド面と間隔を置いて対置されたガイド面を有する第2ガ
イド部とにより構成されている用紙搬送装置において、 上記の排紙ユニットに上記第2ガイド部の上ユニット内
の部分に円滑に接続され上下ユニットの閉鎖状態でその
一部が熱ローラ定着装置の内部に入り込み、下ユニット
に設けられた下側ガイド部と共働して定着後の用紙の上
ユニット内の搬送路迄の用紙搬送路を形成し上下ユニッ
トの開放状態で上記下側ガイド部より離間し、その先端
が定着装置内より退避する部分を設けたことを特徴とす
る用紙搬送装置。1. A portion in the upper unit of a sheet conveying path after fixing of an image forming apparatus, which comprises an upper and lower unit pivotably mounted by a hinge located at an end of the heat roller fixing apparatus on the sheet discharge side. Is formed on the first guide portion formed on the inner surface of the upper unit exterior cover and on the paper discharge unit attached to the machine frame of the upper unit, and is opposed to the guide surface of the first guide portion at a distance. In a sheet conveying device configured by a second guide portion having a guide surface, the sheet discharge unit is smoothly connected to a portion inside the upper unit of the second guide portion, and a part of the upper and lower units is closed. Enters the inside of the heat roller fixing device and cooperates with the lower guide part provided in the lower unit to form a paper conveyance path up to the conveyance path in the upper unit of paper after fixing, and when the upper and lower units are open. Up Apart from the lower guide portion, the sheet conveying apparatus characterized by its leading end provided with a portion to be retracted from the fixing device.
構成され、その定着装置内に延びる部分の先端に定着ロ
ーラより定着後の用紙を分離する分離爪を着脱可能に設
けたことを特徴とする請求項1に記載の用紙搬送装置。2. The second guide portion is constituted by a plurality of ribs, and a separation claw for separating the sheet after fixing from the fixing roller is detachably provided at the tip of the portion extending inside the fixing device. The sheet conveying device according to claim 1.
時に下ユニットに設けられた定着後排紙ローラに圧接
し、上下ユニット開放時に該定着後排紙ローラより離間
する従動コロが設けられていることを特徴とする請求項
1に記載の用紙搬送装置。3. The second guide portion is provided with a driven roller which is pressed against a post-fixing discharge roller provided in the lower unit when the upper and lower units are closed and is separated from the post-fixing discharge roller when the upper and lower units are opened. The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is provided.
られた定着後の用紙搬送路の他に概ね定着装置の排紙方
向に延びる下排紙搬送路を切換可能に有し、上記下排紙
搬送路に用紙を排出する下排紙ローラを下ユニットに有
し、上記の第2ガイド部に上下ユニット閉鎖時に上記下
排紙ローラに圧接し、上下ユニット開放時に該下排紙ロ
ーラより離間する従動コロが設けられていることを特徴
とする請求項1に記載の用紙搬送装置。4. The image forming apparatus has, in addition to the sheet conveying path after fixing provided in the upper unit, a lower sheet discharging conveying path that extends substantially in the sheet discharging direction of the fixing device and is switchable. The lower unit has a lower discharge roller for discharging the paper to the paper conveyance path, and the second guide portion is pressed against the lower discharge roller when the upper and lower units are closed, and is separated from the lower discharge roller when the upper and lower units are opened. The sheet transporting device according to claim 1, further comprising a driven roller that rotates.
ットに、上記上ユニット内搬送路内で発生したジャムを
検知する上排紙ジャムセンサと、上記下排紙搬送路内で
発生したジャムを検知する下排紙ジャムセンサとを取付
ける手段を設けたことを特徴とする請求項5に記載の用
紙搬送装置。5. A paper discharge unit provided in the upper unit, an upper paper discharge jam sensor for detecting a jam generated in the upper unit conveyance path, and a jam generated in the lower paper discharge conveyance path. 6. The sheet conveying apparatus according to claim 5, further comprising a means for attaching a lower sheet discharge jam sensor for detecting the.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15216192A JP3154554B2 (en) | 1992-06-11 | 1992-06-11 | Paper transport device for image forming apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15216192A JP3154554B2 (en) | 1992-06-11 | 1992-06-11 | Paper transport device for image forming apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05341687A true JPH05341687A (en) | 1993-12-24 |
JP3154554B2 JP3154554B2 (en) | 2001-04-09 |
Family
ID=15534361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15216192A Expired - Fee Related JP3154554B2 (en) | 1992-06-11 | 1992-06-11 | Paper transport device for image forming apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3154554B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0764892A2 (en) * | 1995-09-20 | 1997-03-26 | Sharp Kabushiki Kaisha | Laser recording apparatus |
US7796930B2 (en) | 2006-03-31 | 2010-09-14 | Kabushiki Kaisha Toshiba | Anti-toner-adhesion mechanism and sheet conveying apparatus and method thereof |
JP2013105039A (en) * | 2011-11-14 | 2013-05-30 | Brother Ind Ltd | Image forming device |
-
1992
- 1992-06-11 JP JP15216192A patent/JP3154554B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0764892A2 (en) * | 1995-09-20 | 1997-03-26 | Sharp Kabushiki Kaisha | Laser recording apparatus |
EP0764892A3 (en) * | 1995-09-20 | 2000-08-23 | Sharp Kabushiki Kaisha | Laser recording apparatus |
US7796930B2 (en) | 2006-03-31 | 2010-09-14 | Kabushiki Kaisha Toshiba | Anti-toner-adhesion mechanism and sheet conveying apparatus and method thereof |
JP2013105039A (en) * | 2011-11-14 | 2013-05-30 | Brother Ind Ltd | Image forming device |
Also Published As
Publication number | Publication date |
---|---|
JP3154554B2 (en) | 2001-04-09 |
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