JP2676947B2 - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JP2676947B2 JP2676947B2 JP1266660A JP26666089A JP2676947B2 JP 2676947 B2 JP2676947 B2 JP 2676947B2 JP 1266660 A JP1266660 A JP 1266660A JP 26666089 A JP26666089 A JP 26666089A JP 2676947 B2 JP2676947 B2 JP 2676947B2
- Authority
- JP
- Japan
- Prior art keywords
- suction
- transfer
- transfer material
- deck
- image forming
- 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.)
- Expired - Lifetime
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、複写機、プリンタ、ファクシミリなどの画
像形成装置に関するものである。TECHNICAL FIELD The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile, or the like.
粉体トナーを使用する画像形成装置では、転写部で転
写材に転写されたトナーは、定着部で加熱されて転写材
に定着されるが、小型の画像形成装置では、転写部から
定着部までの距離が短いことから、まだ転写中の転写材
の先端が定着部に進入し、そのときの衝撃が転写部に位
置する転写材に伝わり、転写トナー像が乱れて画質不良
を生じることがある。In an image forming apparatus that uses powder toner, the toner transferred to the transfer material in the transfer section is heated and fixed in the transfer material in the fixing section, but in a small image forming apparatus, the toner is transferred from the transfer section to the fixing section. Since the distance is short, the leading edge of the transfer material that is still being transferred may enter the fixing portion, and the impact at that time may be transmitted to the transfer material located in the transfer portion, disturbing the transferred toner image and causing poor image quality. .
このため、転写部と定着部との間にいわゆるエアサク
ション方式のコンベア装置を２台設け、それらの搬送速
度を違えることで、両コンベア装置の間で転写材に弛み
を形成し、この弛みに定着部進入時の衝撃を吸収するよ
うにした画像形成装置が実開昭63−138554号公報で提案
されている。Therefore, two so-called air suction type conveyor devices are provided between the transfer unit and the fixing unit, and the transfer speeds thereof are different, so that slack is formed in the transfer material between the two conveyor devices. An image forming apparatus that absorbs the impact when entering the fixing unit is proposed in Japanese Utility Model Laid-Open No. 63-138554.
〔発明が解決しようとする課題〕 しかしながら、前記画像形成装置では、コンベア装置
の転写材搬送速度を切り換えるための特別の機構や制御
機器が必要となり、装置が複雑化、大型化するという問
題点を有していた。[Problems to be Solved by the Invention] However, in the image forming apparatus, a special mechanism and a control device for switching the transfer material conveying speed of the conveyor device are required, which causes a problem that the device becomes complicated and large. Had.
そこで、本発明は転写部でトナー像が転写された転写
材を定着部に搬送し、ここで前記トナー像を転写材に定
着する画像形成装置において、 前記転写部から定着部に転写材を搬送する搬送装置
を、への字状に形成されたサクションデッキと、該サク
ションデッキの上面に沿って移動する搬送ベルトと、前
記サクションデッキの転写部近傍、及び定着部近傍にの
み配置される吸引孔を介して転写材を前記搬送ベルトに
向かって吸引する吸引手段と、で構成したことを特徴と
するものである。Therefore, the present invention is an image forming apparatus that conveys a transfer material onto which a toner image has been transferred at a transfer portion to a fixing portion, where the toner image is fixed to the transfer material, and conveys the transfer material from the transfer portion to the fixing portion. A suction deck formed in a V-shape, a transport belt moving along the upper surface of the suction deck, and suction holes arranged only near the transfer section and the fixing section of the suction deck. And a suction unit that sucks the transfer material toward the conveyor belt via the.
前記構成によれば、転写部を通過した転写材は、吸引
装置で搬送ベルトに向かって吸引され、該搬送ベルトと
の摩擦によって定着部に搬送される。このとき、搬送ベ
ルトを支持するサクションデッキはへの字状に形成され
ているので、転写材はそれ自身の腰の強さによって、サ
クションデッキ頂上部近傍で山なりに折れ曲がり、搬送
ベルトとの間に隙間を形成し、この隙間を囲むように弛
みを生じる。According to the above configuration, the transfer material that has passed through the transfer unit is sucked toward the conveyor belt by the suction device and is conveyed to the fixing unit by friction with the conveyor belt. At this time, since the suction deck that supports the conveyor belt is formed in a V-shape, the transfer material bends in a mountain near the top of the suction deck due to the strength of the waist of the transfer material, and the transfer material A gap is formed in the gap and slack is generated so as to surround this gap.
したがって、転写材の先端が定着部に進入し、そのと
きの衝撃が転写材の後端側に向かって伝達されると、こ
の衝撃は前記弛み部分の変形として吸収され転写部に伝
わることはない。Therefore, when the front end of the transfer material enters the fixing portion and the impact at that time is transmitted toward the rear end side of the transfer material, this impact is absorbed as deformation of the slack portion and is not transmitted to the transfer portion. .
以下、本発明の実施例を説明する。 Hereinafter, embodiments of the present invention will be described.
第１図に示す画像形成装置では、矢印ａ方向に回転す
る感光体１の外周面が帯電チャージャ２で帯電され、そ
の帯電領域にイメージ光３が露光されて静電潜像が形成
される。この静電潜像は現像装置４でトナー像として顕
像化され、転写チャージャ５との対向部（以下、「転写
部」という。）Ｘで前記トナー像が転写材に転写され
る。なお、転写材は給紙部６より一枚づつ供給され、タ
イミングローラ７でトナー像とタイミングをとって転写
部Ｘに送り出される。In the image forming apparatus shown in FIG. 1, the outer peripheral surface of the photoconductor 1 rotating in the direction of arrow a is charged by the charging charger 2, and the charged area is exposed to the image light 3 to form an electrostatic latent image. This electrostatic latent image is visualized as a toner image by the developing device 4, and the toner image is transferred to a transfer material at a portion (hereinafter, referred to as “transfer portion”) X facing the transfer charger 5. It should be noted that the transfer material is supplied one by one from the paper feeding unit 6 and is sent out to the transfer unit X by the timing roller 7 in time with the toner image.
転写部Ｘを通過した転写材は、分離チャージャ８で感
光体１から分離され、搬送装置９で定着装置10に搬送さ
れて前記トナー像が転写材に加熱定着されたのち排出ロ
ーラ11でトレー12に排出される。The transfer material that has passed through the transfer portion X is separated from the photoconductor 1 by the separation charger 8, is transported to the fixing device 10 by the transport device 9 and the toner image is heated and fixed on the transfer material, and then is discharged to the tray 12 by the discharge roller 11. Is discharged to.
次に、本発明の要旨である搬送装置９について説明す
る。Next, the transport device 9 which is the gist of the present invention will be described.
搬送装置９は、概略、サクションデッキ20、コンベア
装置30、吸引装置40で構成されている。The transfer device 9 is roughly composed of a suction deck 20, a conveyor device 30, and a suction device 40.
サクションデッキ20は、第３図に示すように、その上
部ガイド面21が所定の角度αをもってへの字状に形成さ
れ、その頂上部22が中央よりも定着部側にずらしてあ
り、転写部側の斜面23が定着部側の斜面24よりも長くし
てある。また、前記斜面23,24の裾側にそれぞれ吸引孔2
5,26が設けてあり、転写部側吸引孔25の開口面積が転写
部側吸引孔26の開口面積よりも大きくしてある。As shown in FIG. 3, the suction deck 20 has an upper guide surface 21 formed in a V shape at a predetermined angle α, and a top portion 22 thereof is offset from the center toward the fixing portion, and the transfer portion The side slope 23 is longer than the fixing part side slope 24. In addition, suction holes 2 are provided on the hem sides of the slopes 23 and 24, respectively.
5, 26 are provided, and the opening area of the transfer portion side suction hole 25 is larger than the opening area of the transfer portion side suction hole 26.
コンベア装置30は、一対のローラ31,32と、複数の孔
（図示せず）を有する搬送ベルト33とからなり、前記ロ
ーラ31,32はサクションデッキ20の転写部側、定着部側
にそれぞれ配置され、これらローラ31,32とサクション
デッキ20を囲むように搬送ベルト33と巻回され、ローラ
間でサクションデッキ20の上部ガイド面21に沿って支持
されている。The conveyor device 30 includes a pair of rollers 31 and 32 and a conveyor belt 33 having a plurality of holes (not shown), and the rollers 31 and 32 are arranged on the transfer section side and the fixing section side of the suction deck 20, respectively. The rollers 31 and 32 are wound around the conveyor belt 33 so as to surround the suction deck 20 and supported between the rollers along the upper guide surface 21 of the suction deck 20.
吸引装置40はサクションデッキ20の下に配置され、サ
クションデッキ20の吸引孔25,26を介して搬送ベルト33
の孔を介してベルト上のエアを吸引するようにしてあ
る。The suction device 40 is arranged below the suction deck 20, and through the suction holes 25 and 26 of the suction deck 20, the conveyor belt 33.
The air on the belt is sucked through the holes of the.
以上の構成において、転写部Ｘを通過した転写材Ｓは
タイミングローラ７の搬送力に基づいてサクションデッ
キ20の上に搬送され、吸引装置40によって吸引孔25,26
より下方に吸引されているサクションエアに引かれて搬
送ベルト33に吸着される。In the above configuration, the transfer material S that has passed through the transfer portion X is conveyed onto the suction deck 20 based on the conveying force of the timing roller 7, and is sucked by the suction device 40 by the suction holes 25, 26.
It is attracted to the conveyor belt 33 by being drawn by the suction air sucked downward.
搬送ベルト33に吸着された転写材Ｓは、ローラ31,32
の回転に基づいてサクションデッキ20の回りを移動する
搬送ベルト33の移動とともに矢印ｍ方向に搬送され、サ
クションデッキ20の転写部側傾斜23に沿って上動し、頂
上部22を通過し、定着側傾斜24に沿って下っていく。ま
た、斜面24に沿って下っていく途中で、吸引装置40によ
って吸引孔26より下方に吸引されているサクションエア
に引かれて搬送ベルト33に吸着される。ただし、定着部
側の吸引孔26は転写部側の吸引孔25よりも開口面積が小
さく、定着部側吸引孔26の吸引力F2は転写部側吸引孔25
の吸引力F1よりも小さくなっている。The transfer material S attracted to the conveyor belt 33 is transferred to the rollers 31, 32.
Based on the rotation of the suction deck 20, it is conveyed in the direction of the arrow m with the movement of the conveyor belt 33 that moves around the suction deck 20, moves upward along the inclination 23 on the transfer portion side of the suction deck 20, passes through the top 22, and is fixed. Go down along side slope 24. Further, on the way down the slope 24, the suction device 40 draws the suction air sucked downward from the suction holes 26 and sucks it onto the conveyor belt 33. However, the suction hole 26 on the fixing section side has a smaller opening area than the suction hole 25 on the transfer section side, and the suction force F 2 of the fixing section side suction hole 26 is equal to the transfer section side suction hole 25.
It is smaller than the suction force F 1 of .
以上のようにして転写材Ｓはサクションデッキ20の上
部ガイド面21に沿って搬送され、サクションデッキ頂上
部22の近傍では山なりに湾曲した状態で移動する。つま
り、頂上部22の近傍では、転写材Ｓが搬送ベルト33から
浮き上がった状態で移動し、転写材自身に弛みSaが形成
される。As described above, the transfer material S is conveyed along the upper guide surface 21 of the suction deck 20 and moves in a curved state in the shape of a mountain near the top 22 of the suction deck. That is, in the vicinity of the top portion 22, the transfer material S moves in a state of being lifted from the conveyor belt 33, and slack Sa is formed on the transfer material itself.
定着装置10では、定着上ローラ51と定着下ローラ52が
それぞれ矢印b,c方向に回転しており、搬送装置９を通
過した転写材Ｓの先端はローラ51,52の接触領域（定着
部）Ｙに案内される。このとき、転写材Ｓの先端が上下
いずれかのローラ外周面に当たり、その衝撃によって搬
送装置９を搬送されている転写材Ｓが定着部側斜面24を
移動するベルト33に対して相対的に後退し、その後退量
が前記弛みSaの変形に吸収される。また、前記衝撃の一
部は転写部側斜面23を移動する転写材Ｓにも伝達される
が、ここでは吸引装置40の転写材Ｓに対する吸引力F1が
大きくしてあるので、転写材Ｓが搬送ベルト33に対して
相対的に後退することはない。In the fixing device 10, the upper fixing roller 51 and the lower fixing roller 52 are rotating in the directions of arrows b and c, respectively, and the leading end of the transfer material S passing through the conveying device 9 is the contact area (fixing portion) of the rollers 51 and 52. Guided by Y. At this time, the tip of the transfer material S hits the outer peripheral surface of one of the upper and lower rollers, and the impact causes the transfer material S to be relatively retracted with respect to the belt 33 moving on the fixing portion side slope 24. However, the amount of retreat is absorbed by the deformation of the sag Sa. Further, a part of the impact is transmitted to the transfer material S moving on the transfer portion side slope 23, but since the suction force F 1 of the suction device 40 against the transfer material S is increased here, the transfer material S is Does not move backward relative to the conveyor belt 33.
したがって、転写部Ｘで転写材Ｓに転写されるトナー
像に乱れが生じることはなく、高画質の画像が得られ
る。Therefore, the toner image transferred to the transfer material S at the transfer portion X is not disturbed, and a high quality image can be obtained.
ところで、サクションデッキ頂上部22の折れ曲げ角度
αは、画像形成装置に用いられる転写材Ｓの腰の強さに
よって異なり、複写機、プリンタ、ファクシミリなどで
一般に使用される普通紙の場合、約150〜170゜が適当
で、160〜165゜の範囲が弛みSaを形成する上で最も好ま
しい。By the way, the bending angle α of the suction deck top 22 differs depending on the stiffness of the transfer material S used in the image forming apparatus, and is about 150 in the case of plain paper generally used in copiers, printers, facsimiles and the like. 〜170 ° is suitable, and the range of 160-165 ° is the most preferable for forming sagging Sa.
なお、以上の説明では、転写部側の吸引孔25と定着部
側の吸引孔26の大きさを変えることで、両側の転写材Ｓ
に対する吸引力F1,F2を違えるものとしたが、吸引装置4
0を２つ設け、転写部側の吸引孔25に接続する吸引装置
の風量を、定着部側の吸引孔26に接続する吸引装置の風
量よりも多くすることで吸引力に差を設けるようにして
もよい。In the above description, by changing the sizes of the suction holes 25 on the transfer section side and the suction holes 26 on the fixing section side, the transfer material S on both sides is changed.
The suction force F 1 and F 2 to the
By providing two 0s and making the air volume of the suction device connected to the suction hole 25 on the transfer portion side larger than the air volume of the suction device connected to the suction hole 26 on the fixing portion side, a difference in suction force is provided. May be.
以上の説明で明らかなように、本発明に係る画像形成
装置では、画像形成中に駆動を切り換えるような機構・
制御を必要とせず、簡単な構成によって定着部に進入す
る転写材の衝撃を吸収し転写部に伝わるのを防止するこ
とができる。As is clear from the above description, in the image forming apparatus according to the present invention, a mechanism for switching drive during image formation
It is possible to prevent the impact of the transfer material entering the fixing portion from being absorbed and transmitted to the transfer portion with a simple configuration without requiring control.
第１図は画像形成装置の概略断面図、第２図は搬送装置
の断面図、第３図はサクションデッキの斜視図である。 ９……搬送装置、20……サクションデッキ、21……上部
ガイド面、22……頂上部、25,26……吸引孔、30……コ
ンベア装置、31,32……ローラ、33……搬送ベルト、40
……吸引装置、Ｘ……転写部、Ｙ……定着部、Ｓ……転
写材、F1,F2……吸引力。FIG. 1 is a schematic sectional view of an image forming apparatus, FIG. 2 is a sectional view of a conveying apparatus, and FIG. 3 is a perspective view of a suction deck. 9 ... Conveyor, 20 ... Suction deck, 21 ... Upper guide surface, 22 ... Top, 25,26 ... Suction hole, 30 ... Conveyor, 31,32 ... Roller, 33 ... Convey Belt, 40
…… Suction device, X …… Transfer section, Y …… Fixing section, S …… Transfer material, F 1 , F 2 …… Suction force.
Claims (1)
着部に搬送し、ここで前記トナー像を転写材に定着する
画像形成装置において、 前記転写部から定着部に転写材を搬送する搬送装置を、
への字状に形成されたサクションデッキと、該サクショ
ンデッキの上面に沿って移動する搬送ベルトと、前記サ
クションデッキの転写部近傍、及び定着部近傍にのみ配
置される吸引孔を介して転写材を前記搬送ベルトに向か
って吸引する吸引手段と、で構成したことを特徴とする
画像形成装置。1. An image forming apparatus that conveys a transfer material, on which a toner image is transferred at a transfer portion, to a fixing portion, and fixes the toner image on the transfer material, and conveys the transfer material from the transfer portion to the fixing portion. Transport device
Transfer material through a suction deck formed in a V shape, a conveyor belt that moves along the upper surface of the suction deck, and suction holes that are arranged only near the transfer portion and the fixing portion of the suction deck. An image forming apparatus comprising: a suction unit configured to suck the sheet toward the conveyor belt.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1266660A JP2676947B2 (en) | 1989-10-13 | 1989-10-13 | Image forming device |
| US07/595,248 US5063415A (en) | 1989-10-13 | 1990-10-10 | Image forming apparatus |
| DE4032290A DE4032290A1 (en) | 1989-10-13 | 1990-10-11 | IMAGING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1266660A JP2676947B2 (en) | 1989-10-13 | 1989-10-13 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03128853A JPH03128853A (en) | 1991-05-31 |
| JP2676947B2 true JP2676947B2 (en) | 1997-11-17 |
Family
ID=17433917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1266660A Expired - Lifetime JP2676947B2 (en) | 1989-10-13 | 1989-10-13 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2676947B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6733912B2 (en) * | 2002-04-03 | 2004-05-11 | 3M Innovative Properties Company | Fixture pallet apparatus for automated assembly of fuel cell material layers |
| US6740131B2 (en) * | 2002-04-03 | 2004-05-25 | 3M Innovative Properties Company | Apparatus for automatically fabricating fuel cell |
| US6868890B2 (en) | 2002-04-03 | 2005-03-22 | 3M Innovative Properties Company | Method and apparatus for peeling a thin film from a liner |
| US6749713B2 (en) | 2002-04-03 | 2004-06-15 | 3M Innovative Properties Company | Apparatus and method for separating a fuel cell assembly from a bonding fixture |
| US20030190226A1 (en) | 2002-04-03 | 2003-10-09 | 3M Innovative Properties Company | Apparatus and method for singulating porous fuel cell layers using adhesive tape pick head |
| US20030188615A1 (en) | 2002-04-03 | 2003-10-09 | 3M Innovative Properties Company | Angled product transfer conveyor |
| US6756146B2 (en) | 2002-04-03 | 2004-06-29 | 3M Innovative Properties Company | Apparatus and method for automatically stacking fuel cell material layers |
| US6780276B2 (en) | 2002-04-03 | 2004-08-24 | 3M Innovative Properties Company | Gap adjuster for laminating rolls |
-
1989
- 1989-10-13 JP JP1266660A patent/JP2676947B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03128853A (en) | 1991-05-31 |
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