JPH06298397A - Conveying device - Google Patents
Conveying deviceInfo
- Publication number
- JPH06298397A JPH06298397A JP5088723A JP8872393A JPH06298397A JP H06298397 A JPH06298397 A JP H06298397A JP 5088723 A JP5088723 A JP 5088723A JP 8872393 A JP8872393 A JP 8872393A JP H06298397 A JPH06298397 A JP H06298397A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- fixing
- sheet
- section
- transfer paper
- 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
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Registering Or Overturning Sheets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機等の用紙の搬送
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device such as a copying machine.
【０００２】[0002]
【従来の技術】図４は従来の複写機等の用紙の搬送装置
の要部を示す説明図である。この種の複写機の用紙搬送
装置では、給紙トレイなどから送られた転写紙Ｐは、給
紙部であるレジストローラ１のニップ部で一度ストップ
し、画像を載せた感光体ドラム２とタイミングをとり再
びスタートし送り出される。レジストローラ１から送り
出された転写紙Ｐは作像部で感光体ドラム２に作られた
画像を転写し、送り出され、定着部へ進入していく。こ
の定着部もレジストローラ１と同じく一対のローラ３で
構成されており、一定の荷重と一定の熱量を保持して転
写紙Ｐに載せられた画像を永久画像とするための処理を
する。2. Description of the Related Art FIG. 4 is an explanatory view showing a main part of a conventional sheet conveying device such as a copying machine. In the paper transporting device of this type of copying machine, the transfer paper P sent from a paper feed tray or the like is temporarily stopped at the nip portion of the registration roller 1 which is the paper feed portion, and the timing with the photosensitive drum 2 on which an image is placed Takes again and is sent out. The transfer paper P sent out from the registration roller 1 transfers the image formed on the photosensitive drum 2 in the image forming section, is sent out, and enters the fixing section. This fixing unit is also composed of a pair of rollers 3 like the registration roller 1, and performs a process for making an image placed on the transfer paper P a permanent image while holding a constant load and a constant amount of heat.
【０００３】[0003]
【発明が解決しようとする課題】ところが、近年複写機
が小型化されそれに伴い搬送経路も短くなっている。い
わば通紙サイズギリギリの部分にエンジン部が集まって
おり、用紙搬送のためのバッファが設けられず、円滑な
搬送を行うことが難しい。However, in recent years, copying machines have been downsized, and along with this, the conveying path has become shorter. In a sense, the engine section is gathered at the end of the sheet size, and a buffer for sheet conveyance is not provided, which makes it difficult to perform smooth conveyance.
【０００４】例えば、搬送ローラ１、感光体ドラム２、
定着ローラ３の各部品の寸法精度（径、真直度など）や
圧バランス，転写紙Ｐの条件（厚さ、調湿など）などで
転写紙Ｐのスピードが手前側と奥側で変化してしまい、
最後の定着部に進入して来た時、転写紙Ｐに撓みが発生
したり、または引張り合う。その結果、転写紙Ｐのシ
ワ、画像の曲がり、擦れなどに発展してしまう。For example, the conveying roller 1, the photosensitive drum 2,
Depending on the dimensional accuracy (diameter, straightness, etc.) of each part of the fixing roller 3, the pressure balance, the conditions (thickness, humidity control, etc.) of the transfer paper P, the speed of the transfer paper P may change between the front side and the back side. Sisters,
When the transfer sheet P enters the final fixing portion, the transfer sheet P is bent or pulled together. As a result, the transfer paper P develops into wrinkles, image bending, rubbing, and the like.
【０００５】本発明の目的は、多少の部品の精度のバラ
ツキがあろうともそれを吸収して用紙搬送を円滑に行え
ることができる搬送装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a conveying device capable of smoothly conveying a sheet by absorbing a slight variation in the precision of the parts.
【０００６】[0006]
【課題を解決するための手段】前記目的は、１対の加圧
された給紙部を備え、この給紙部から送り出された用紙
が作像部を通過することにより画像が転写され、更に作
像部から搬送された用紙は定着部の一対の加圧されたロ
ーラ対を通過することにより永久画像として排出される
機構を有し、前記給紙部，作像部，及び定着部の３つの
部分が直線搬送になっている搬送装置において、前記定
着部の駆動を、搬送される用紙とタイミングをとってオ
ン・オフさせるようにした第１の手段により達成され
る。The object is to provide a pair of pressurized paper feed portions, and the paper sent from the paper feed portions passes through an image forming portion to transfer an image, and The sheet conveyed from the image forming section has a mechanism that is discharged as a permanent image by passing through a pair of pressured rollers of the fixing section. The sheet feeding section, the image forming section, and the fixing section are provided. In a transporting device in which two parts are linearly transported, the fixing unit is driven by a first means which is turned on / off in synchronization with the transported paper.
【０００７】前記目的は、前記第１の手段において、前
記給紙部の加圧された１対のローラに圧解除機構を設け
た第２の手段により達成される。The above-mentioned object can be achieved by a second means in which the pressure releasing mechanism is provided in the pair of pressure rollers of the paper feeding section in the first means.
【０００８】前記目的は、前記第２の手段において、前
記圧解除機構を用紙のサイズ別により動作させるように
した第３の手段により達成される。The above-mentioned object can be achieved by the third means in the second means, wherein the pressure releasing mechanism is operated according to the size of the paper.
【０００９】前記目的は、前記第２の手段において、前
記圧解除機構を用紙の撓み高さにより動作させるように
した第４の手段により達成される。The above object can be achieved by the fourth means in the second means, wherein the pressure releasing mechanism is operated by the bending height of the sheet.
【００１０】前記目的は、前記第２の手段において、前
記作像部と前記定着部の間に用紙搬送ローラを設けた第
５の手段により達成される。The above object can be achieved by a fifth means in the second means, wherein a sheet conveying roller is provided between the image forming section and the fixing section.
【００１１】前記目的は、前記第１の手段において、前
記定着部の定着ローラ対と前記給紙部のレジストローラ
対の距離を最大通紙サイズよりも長く設定した第６の手
段により達成される。The above object can be achieved by a sixth means in which the distance between the fixing roller pair of the fixing unit and the registration roller pair of the paper feeding unit is set longer than the maximum sheet passing size in the first means. .
【００１２】[0012]
【作用】前記第１の手段においては、定着部に来るまで
に速度差の付いた用紙の先端を定着ニップで一様にし、
給紙のレジスト的役割をする。それにより定着への進入
がスムースになり更に定着部とレジスト部とで引張り合
うことはないので、シワ、画像曲がり、擦れ等の発生を
防ぐことができる。In the first means, the leading end of the sheet having a speed difference before reaching the fixing section is made uniform in the fixing nip,
Serves as a resist for paper feeding. As a result, the fixing process is smoothly entered and the fixing portion and the resist portion are not pulled to each other, so that wrinkles, image bending, rubbing, and the like can be prevented.
【００１３】前記第２の手段においては、転写紙の先端
が定着部に入る前にレジスト部の圧を解除するので、転
写紙に速度差が生じることなく、撓みや引張りが起きず
に転写紙を送れ、シワ、画像曲がり、擦れ等の発生を防
ぐことができる。In the second means, since the pressure of the resist portion is released before the leading edge of the transfer paper enters the fixing portion, there is no speed difference in the transfer paper and the transfer paper does not bend or pull. It is possible to prevent the occurrence of wrinkles, image bending, rubbing, and the like.
【００１４】前記第３の手段においては、圧解除を転写
紙の長さを選んで行うので、圧解除時の異音を削減し、
また、小サイズ時にコピースピードが高まっても対応で
きる。In the third means, since the pressure release is performed by selecting the length of the transfer paper, the abnormal noise at the time of pressure release is reduced,
In addition, even if the copy speed is increased when the size is small, it can be handled.
【００１５】前記第４の手段においては、転写紙の速度
差により撓みが発生した時のみの圧解除をするので、圧
解除時の異音を削減し、更に用紙搬送力を低下させるこ
となく搬送できる。In the fourth means, since the pressure is released only when the bending occurs due to the speed difference of the transfer paper, the abnormal noise at the time of the pressure release is reduced, and the paper is conveyed without lowering the paper conveying force. it can.
【００１６】前記第５の手段においては、補助的に搬送
ローラを設けたので、小サイズの転写紙がレジストの圧
解除で搬送力不足にならずに、転写紙を定着ニップへ案
内できる。特に、感光体の搬送力が小の時、効果的であ
る。In the fifth means, since the conveying roller is provided as an auxiliary, the transfer sheet can be guided to the fixing nip without the conveyance force of the small-sized transfer sheet becoming insufficient due to the pressure release of the resist. In particular, it is effective when the conveying force of the photoconductor is small.
【００１７】前記第６の手段においては、定着部とレジ
スト部に転写紙が跨らないので、定着部とレジスト部と
の互いの線速の影響がなく転写紙を搬送でき、シワ、画
像曲がり、擦れを防止することができる。In the sixth means, since the transfer sheet does not extend over the fixing section and the resist section, the transfer sheet can be conveyed without being influenced by the linear velocity of the fixing section and the resist section, and wrinkles and image bending can occur. It is possible to prevent rubbing.
【００１８】[0018]
【実施例】以下、本発明の実施例を図１〜図３を参照し
て説明する。Embodiments of the present invention will be described below with reference to FIGS.
【００１９】図１は複写機等における転写紙の搬送装置
の要部を示す斜視図、図２（ａ），（ｂ）はレジストロ
ーラの加圧時及び非加圧時を示す説明図、図３は補助の
搬送ローラを備えた例を示す説明図である。FIG. 1 is a perspective view showing a main part of a transfer sheet conveying device in a copying machine or the like, and FIGS. 2 (a) and 2 (b) are explanatory views showing a registration roller under pressure and no pressure. 3 is an explanatory view showing an example in which an auxiliary transport roller is provided.
【００２０】これらの図において、１１は上レジストロ
ーラ１１ａ及び上下動可能な下レジストローラ１１ｂか
らなるレジストローラ、１２は感光体ドラム、１３は定
着ローラ、１４は軸１５を中心に回転支持されたカム、
１６は下レジストローラ１１ｂとカム１４との間に配設
された加圧（例えば圧縮）スプリングであり、レジスト
ローラ１１は用紙搬送のため加圧スプリング１６で加圧
されており（図２の（ａ）参照）、カム１３の回転によ
り加圧または図２（ｂ）に示すように除圧される。この
タイミングは送られた転写紙Ｐの先端が定着部ニップに
到達した時、解除される。１７は定着部手前（手前と奥
側に各１コ）に設けた光センサで、光センサ１７により
転写紙Ｐの撓みＰTの大きさを検知し、撓みＰTがある大
きさになった時、加圧スプリング１６により加圧された
レジストローラ１１の圧を解除する。In these figures, 11 is a registration roller composed of an upper registration roller 11a and a vertically movable lower registration roller 11b, 12 is a photosensitive drum, 13 is a fixing roller, and 14 is rotatably supported about a shaft 15. cam,
Reference numeral 16 denotes a pressure (for example, compression) spring disposed between the lower registration roller 11b and the cam 14, and the registration roller 11 is pressed by the pressure spring 16 for conveying the sheet (((2) in FIG. 2). (See a)), the cam 13 is rotated to pressurize or depressurize as shown in FIG. This timing is released when the front end of the transferred transfer paper P reaches the fixing portion nip. Reference numeral 17 is an optical sensor provided on the front side of the fixing unit (one on the front side and one on the rear side). The optical sensor 17 detects the size of the deflection P T of the transfer paper P, and the deflection P T becomes a certain size. At this time, the pressure applied to the registration roller 11 by the pressure spring 16 is released.
【００２１】次に、実施例の動作について説明する。先
ず用紙搬送の全体動作について述べると、給紙トレイな
どから送られた転写紙Ｐは、レジストローラ１１のニッ
プ部で一度ストップし、画像を載せた感光体ドラム１２
とタイミングをとり再びスタートし送り出される。この
レジストローラ１１はある一定加重で加圧されており、
回転する。レジストローラ１１から送り出された転写紙
Ｐは作像部で感光体ドラム１２に作られた画像を転写
し、送り出され、定着部へ進入していく。定着部もレジ
ストローラ１１と同じく一対のローラ１３で構成されて
おり一定の荷重と一定の熱量を保持し、転写紙Ｐに載せ
られた画像を永久画像とするための処理をする。Next, the operation of the embodiment will be described. First, the overall operation of sheet conveyance will be described. The transfer sheet P sent from a sheet feed tray or the like is temporarily stopped at the nip portion of the registration roller 11 and the photosensitive drum 12 on which an image is placed.
Then, it was started again and was sent out. The registration roller 11 is pressed with a certain constant weight,
Rotate. The transfer paper P sent out from the registration roller 11 transfers the image formed on the photosensitive drum 12 in the image forming section, is sent out, and enters the fixing section. The fixing unit is also composed of a pair of rollers 13 like the registration roller 11, holds a constant load and a constant amount of heat, and performs processing for making an image placed on the transfer paper P a permanent image.
【００２２】次に、実施例の特徴部分の動作の詳細につ
いて説明する。感光体ドラム１２にて転写される時も転
写紙Ｐは静電的に感光体ドラム１２に密着し、搬送力は
ある程度は持っている。感光体ドラム１２から送られて
来た転写紙Ｐの先端が定着部の定着ローラ１３のニップ
部に衝突し、更に給紙レジスト部（レジストローラ１
１）で転写紙Ｐを全て送り終わるまで定着駆動（定着ロ
ーラ１３の駆動）はストップしている。転写紙Ｐの後端
がレジストローラ１１を抜けた後、定着ローラ１３は回
転し始めて転写紙Ｐを排出する。転写紙Ｐのサイズと、
レジスト部及び定着部間の距離とでタイミングをとり定
着部の駆動がオン・オフする。Next, details of the operation of the characteristic portion of the embodiment will be described. Even when the transfer paper P is transferred on the photoconductor drum 12, the transfer paper P electrostatically adheres to the photoconductor drum 12 and has a carrying force to some extent. The front end of the transfer paper P sent from the photoconductor drum 12 collides with the nip portion of the fixing roller 13 of the fixing portion, and further, the paper feed registration portion (registration roller 1
The fixing drive (drive of the fixing roller 13) is stopped until the transfer paper P is completely fed in 1). After the trailing edge of the transfer sheet P has passed through the registration roller 11, the fixing roller 13 starts rotating and ejects the transfer sheet P. The size of the transfer paper P,
The driving of the fixing unit is turned on / off in synchronization with the distance between the registration unit and the fixing unit.
【００２３】レジストローラ１１は用紙搬送のため加圧
スプリング１６により加圧されており、送られた転写紙
Ｐの先端が定着部ニップに到達した時、カム１４の回転
により加圧が解除される（（図２の（ｂ）参照））。The registration roller 11 is pressed by a pressure spring 16 for conveying the paper, and when the leading end of the transferred transfer paper P reaches the fixing portion nip, the pressure is released by the rotation of the cam 14. (See (b) of FIG. 2)).
【００２４】なお、転写紙サイズが定着部及びレジスト
部の距離よりも短い場合、圧解除の動作は特に行わず、
長い時のみこの機構が動作する。サイズ検知は給紙時に
行われ、またレジストローラ１１近傍にセンサ（図示せ
ず）があり送られる転写紙Ｐの長さを検知する。When the transfer paper size is shorter than the distance between the fixing portion and the resist portion, the pressure releasing operation is not performed,
This mechanism works only for a long time. The size detection is performed at the time of paper feeding, and a sensor (not shown) is provided near the registration roller 11 to detect the length of the transfer paper P to be sent.
【００２５】また、図２に示す定着部手前の光センサ１
７により、転写紙Ｐの撓みＰTの大きさを検知し、撓み
ＰTがある大きさになった時、前述のように加圧された
レジスト部の圧を解除している。The optical sensor 1 in front of the fixing unit shown in FIG.
The size of the flexure P T of the transfer paper P is detected by 7, and when the flexure P T reaches a certain size, the pressure of the resist portion pressed as described above is released.
【００２６】次に、本発明の変形例を説明する。この例
では、図４に示すように感光体ドラム１２と定着部の間
に補助の搬送ローラ１８が設けられている。搬送ローラ
１８はゴムなど弾力性のある羽根状部材１９が取付けら
れており、この羽根状部材１９により転写紙Ｐを送るよ
うになつている。レジスト部の圧を解除するタイミング
は、転写された転写紙Ｐの先端が搬送ローラ１８に到達
した時、前述と同様により行われる。Next, a modification of the present invention will be described. In this example, as shown in FIG. 4, an auxiliary conveyance roller 18 is provided between the photosensitive drum 12 and the fixing section. An elastic blade-shaped member 19 such as rubber is attached to the conveying roller 18, and the transfer paper P is fed by the blade-shaped member 19. The timing of releasing the pressure in the registration portion is the same as that described above when the leading end of the transferred transfer paper P reaches the transport roller 18.
【００２７】なお、定着ローラ１３のニップとレジスト
ローラ１１のニップの距離が、複写機の最大通紙サイズ
よりも長い構成になっている。The distance between the nip of the fixing roller 13 and the nip of the registration roller 11 is longer than the maximum sheet passing size of the copying machine.
【００２８】このように構成された前記実施例にあって
は、１対の加圧された給紙部を備え、この給紙部から送
り出された転写紙Ｐが作像部を通過することにより画像
が転写され、更に作像部から搬送された転写紙Ｐは定着
部の一対の加圧されたローラ対を通過することにより永
久画像として排出される機構を有し、給紙部，作像部，
及び定着部の３つの部分が直線搬送になっている搬送装
置において、定着部の駆動を、搬送される転写紙Ｐとタ
イミングをとってオン・オフさせるようにしたため、定
着部に来るまでに速度差の付いた転写紙Ｐの先端を定着
ニップで一様にし、給紙のレジスト的役割をする。それ
により定着部への進入がスムースになり更に定着部とレ
ジスト部とで転写紙Ｐを引張り合うことはないので、シ
ワ、画像曲がり、擦れ等の発生を防ぐことができる。In the above-described embodiment, a pair of pressurized paper feed units are provided, and the transfer paper P sent from the paper feed units passes through the image forming unit. The transfer sheet P to which the image is transferred and further conveyed from the image forming section has a mechanism for discharging as a permanent image by passing through a pair of pressured rollers of the fixing section. Department,
Also, in the transporting device in which the three parts of the fixing part are linearly transported, the driving of the fixing part is turned on / off in time with the transfer paper P being transported. The leading end of the transfer sheet P having the difference is made uniform in the fixing nip, and it functions as a resist for feeding. As a result, the entry into the fixing section becomes smooth, and the fixing section and the resist section do not pull the transfer sheet P against each other, so that the occurrence of wrinkles, image bending, rubbing, etc. can be prevented.
【００２９】前記実施例にあっては、給紙部の加圧され
た１対のローラ１１ａ，１１ｂに圧解除機構（１４，１
５，１６）を設けたため、転写紙Ｐの先端が定着部に入
る前にレジスト部の圧を解除するので、転写紙Ｐに速度
差が生じることなく、撓みＰTや引張りを起こさずに転
写紙Ｐを送れ、シワ、画像曲がり、擦れ等の発生を防ぐ
ことができる。In the above-described embodiment, the pressure releasing mechanism (14, 1) is provided to the pair of pressurized rollers 11a, 11b of the sheet feeding section.
Since provided with 5, 16), transfer without causing the tip of the transfer paper P releases the pressure of the resist section prior to entering the fixing unit, the transfer sheet without speed difference occurs P, the deflection P T and tensile The paper P can be fed, and wrinkles, image bending, rubbing, and the like can be prevented.
【００３０】前記実施例にあっては、圧解除機構（１
４，１５，１６）を転写紙Ｐのサイズ別により動作させ
るようにしたため、圧解除を転写紙Ｐの長さを選んで行
い、圧解除時の異音を削減し、また、小サイズ時にコピ
ースピードが高まっても対応できる。In the above embodiment, the pressure release mechanism (1
4, 15 and 16) are operated according to the size of the transfer paper P, the pressure is released by selecting the length of the transfer paper P to reduce the abnormal noise when the pressure is released, and to copy when the size is small. Even if speed increases, we can cope.
【００３１】前記実施例にあっては、圧解除機構（１
４，１５，１６）を転写紙Ｐの撓みＰT高さにより動作
させるようにしたため、転写紙Ｐの速度差により撓みＰ
Tが発生した時のみの圧解除をするので、圧解除時の異
音を削減し、更に用紙搬送力を低下させることなく搬送
できる。In the above embodiment, the pressure release mechanism (1
4, 15 and 16) are operated by the deflection P T height of the transfer paper P, the deflection P due to the speed difference of the transfer paper P
Since the pressure is released only when T occurs, abnormal noise at the time of releasing the pressure can be reduced, and the sheet can be conveyed without lowering the sheet conveying force.
【００３２】前記実施例にあっては、作像部と定着部の
間に搬送ローラ１８を設けたため、小サイズの転写紙Ｐ
がレジストローラ１１の圧解除で搬送力不足にならず
に、転写紙Ｐを定着ニップへ案内できる。特に、感光体
ドラム１２の搬送力が小の時、効果的である。In the above embodiment, since the conveying roller 18 is provided between the image forming section and the fixing section, the transfer paper P of a small size is formed.
However, the transfer paper P can be guided to the fixing nip without the conveyance force becoming insufficient due to the pressure release of the registration roller 11. Particularly, it is effective when the conveying force of the photosensitive drum 12 is small.
【００３３】前記実施例にあっては、定着部の定着ロー
ラ対１３と給紙部のレジストローラ対１１の距離を最大
通紙サイズよりも長く設定したため、定着部とレジスト
部に転写紙Ｐが跨らないので、定着部とレジスト部との
互いの線速の影響がなく転写紙Ｐを搬送でき、シワ、画
像曲がり、擦れを防止することができる。In the above embodiment, since the distance between the fixing roller pair 13 of the fixing section and the registration roller pair 11 of the sheet feeding section is set longer than the maximum sheet passing size, the transfer paper P is placed between the fixing section and the registration section. Since it does not straddle, the transfer sheet P can be conveyed without being affected by the linear velocity of the fixing section and the resist section, and wrinkles, image bending, and rubbing can be prevented.
【００３４】[0034]
【発明の効果】請求項１記載の発明によれば、定着部に
来るまでに速度差の付いた転写紙の先端を定着ニップで
一様にし、給紙のレジスト的役割をする。それにより定
着への進入がスムースになり更に定着部とレジスト部と
で引張り合うことはないので、シワ、画像曲がり、擦れ
等の発生を防ぐことができる。According to the first aspect of the present invention, the leading end of the transfer paper, which has a speed difference until it reaches the fixing section, is made uniform in the fixing nip, and functions as a resist for feeding. As a result, the fixing process is smoothly entered and the fixing portion and the resist portion are not pulled to each other, so that wrinkles, image bending, rubbing, and the like can be prevented.
【００３５】請求項２記載の発明によれば、転写紙の先
端が定着部に入る前にレジスト部の圧を解除するので、
転写紙に速度差が生じることなく、撓みや引張りが起き
ずに転写紙を送れ、シワ、画像曲がり、擦れ等の発生を
防ぐことができる。According to the second aspect of the present invention, the pressure in the resist portion is released before the leading edge of the transfer paper enters the fixing portion.
It is possible to feed the transfer paper without causing a speed difference in the transfer paper and without causing bending or pulling, and it is possible to prevent wrinkles, image bending, and rubbing.
【００３６】請求項３記載の発明によれば、圧解除を転
写紙の長さを選んで行うので、圧解除時の異音を削減
し、また、小サイズ時にコピースピードが高まっても対
応できる。According to the third aspect of the present invention, since the pressure release is performed by selecting the length of the transfer paper, the abnormal noise at the time of the pressure release is reduced, and it is possible to cope with the increase in the copy speed when the size is small. .
【００３７】請求項４記載の発明によれば、転写紙の速
度差により撓みが発生した時のみの圧解除をするので、
圧解除時の異音を削減し、更に用紙搬送力を低下させる
ことなく搬送できる。According to the fourth aspect of the present invention, the pressure is released only when the bending occurs due to the speed difference of the transfer paper.
Abnormal noise when pressure is released can be reduced, and the paper can be conveyed without lowering the paper conveying force.
【００３８】請求項５記載の発明によれば、補助的に搬
送ローラを設けたので、小サイズの転写紙がレジストの
圧解除で搬送力不足にならずに、転写紙を定着ニップへ
案内できる。特に、感光体の搬送力が小の時、効果的で
ある。According to the fifth aspect of the present invention, since the conveying roller is additionally provided, the transfer sheet can be guided to the fixing nip without the conveying force of the small-sized transfer sheet being insufficient due to pressure release of the resist. . In particular, it is effective when the conveying force of the photoconductor is small.
【００３９】請求項６記載の発明によれば、定着部とレ
ジスト部に転写紙が跨らないので、定着部とレジスト部
との互いの線速の影響がなく転写紙を搬送でき、シワ、
画像曲がり、擦れを防止することができる。According to the sixth aspect of the present invention, since the transfer sheet does not extend over the fixing section and the resist section, the transfer sheet can be conveyed without being influenced by the linear velocity of the fixing section and the resist section, and wrinkles,
Image bending and rubbing can be prevented.
【図１】本発明の実施例に係る搬送装置の要部を示す斜
視図である。FIG. 1 is a perspective view showing a main part of a carrying device according to an embodiment of the present invention.
【図２】本発明の実施例に係る搬送装置のレジストロー
ラの加圧時及び非加圧時を示す説明図である。FIG. 2 is an explanatory diagram showing a registration roller of the conveyance device according to an exemplary embodiment of the present invention when pressure is applied and when pressure is not applied.
【図３】本発明の実施例に係る搬送装置の補助の搬送ロ
ーラを備えた例を示す説明図である。FIG. 3 is an explanatory diagram showing an example in which an auxiliary conveying roller of the conveying device according to the exemplary embodiment of the present invention is provided.
【図４】従来の複写機等の用紙の搬送装置の要部を示す
説明図である。FIG. 4 is an explanatory diagram showing a main part of a sheet conveying device such as a conventional copying machine.
１１ レジストローラ １１ 上レジストローラ１１ａ １１ｂ 下レジストローラ １２ 感光体ドラム １３ 定着ローラ １４ カム １５ 軸 １６ 加圧スプリング １７ 光センサ Ｐ 転写紙 １８ 搬送ローラ １９ 羽根状部材 11 Registration Roller 11 Upper Registration Roller 11a 11b Lower Registration Roller 12 Photoreceptor Drum 13 Fixing Roller 14 Cam 15 Shaft 16 Pressure Spring 17 Optical Sensor P Transfer Paper 18 Conveying Roller 19 Vane Member
Claims (6)
紙部から送り出された用紙が作像部を通過することによ
り画像が転写され、更に作像部から搬送された用紙は定
着部の一対の加圧されたローラ対を通過することにより
永久画像として排出される機構を有し、前記給紙部，作
像部，及び定着部の３つの部分が直線搬送になっている
搬送装置において、前記定着部の駆動を、搬送される用
紙とタイミングをとってオン・オフさせるようにしたこ
とを特徴とする搬送装置。1. A paper sheet comprising a pair of pressurized paper feed portions, wherein the paper fed from the paper feed portion passes through an image forming portion to transfer an image, and the paper is further conveyed from the image forming portion. Has a mechanism for discharging a permanent image by passing through a pair of pressured rollers of the fixing unit, and the three parts of the paper feeding unit, the image forming unit, and the fixing unit are linearly conveyed. In the transporting device, the fixing device is turned on / off in synchronization with the sheet to be transported.
圧された１対のローラに圧解除機構を設けたことを特徴
とする搬送装置。2. The conveyance device according to claim 1, wherein a pressure releasing mechanism is provided on the pair of pressure rollers of the paper feeding unit.
を用紙のサイズ別により動作させるようにしたことを特
徴とする搬送装置。3. The conveying device according to claim 2, wherein the pressure release mechanism is operated according to the size of the paper.
を用紙の撓み高さにより動作させるようにしたことを特
徴とする搬送装置。4. The conveyance device according to claim 2, wherein the pressure release mechanism is operated by the bending height of the sheet.
記定着部の間に用紙搬送ローラを設けたことを特徴とす
る搬送装置。5. The transport device according to claim 2, further comprising a sheet transport roller provided between the image forming unit and the fixing unit.
着ローラ対と前記給紙部のレジストローラ対の距離を最
大通紙サイズよりも長く設定したことを特徴とする搬送
装置。6. The conveying device according to claim 1, wherein the distance between the fixing roller pair of the fixing section and the registration roller pair of the sheet feeding section is set longer than the maximum sheet passing size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5088723A JPH06298397A (en) | 1993-04-15 | 1993-04-15 | Conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5088723A JPH06298397A (en) | 1993-04-15 | 1993-04-15 | Conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06298397A true JPH06298397A (en) | 1994-10-25 |
Family
ID=13950832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5088723A Pending JPH06298397A (en) | 1993-04-15 | 1993-04-15 | Conveying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06298397A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008013352A (en) * | 2006-07-10 | 2008-01-24 | Ricoh Co Ltd | Sheet material carrying device and image forming device |
| JP2017141070A (en) * | 2016-02-08 | 2017-08-17 | 富士ゼロックス株式会社 | Image formation apparatus |
-
1993
- 1993-04-15 JP JP5088723A patent/JPH06298397A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008013352A (en) * | 2006-07-10 | 2008-01-24 | Ricoh Co Ltd | Sheet material carrying device and image forming device |
| JP2017141070A (en) * | 2016-02-08 | 2017-08-17 | 富士ゼロックス株式会社 | Image formation apparatus |
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