JP2003081509A - Paper ejector - Google Patents

Paper ejector

Info

Publication number
JP2003081509A
JP2003081509A JP2001279008A JP2001279008A JP2003081509A JP 2003081509 A JP2003081509 A JP 2003081509A JP 2001279008 A JP2001279008 A JP 2001279008A JP 2001279008 A JP2001279008 A JP 2001279008A JP 2003081509 A JP2003081509 A JP 2003081509A
Authority
JP
Japan
Prior art keywords
transfer material
curl
roller
fixing
roller pair
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
Application number
JP2001279008A
Other languages
Japanese (ja)
Inventor
Masami Okamoto
政己 岡本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2001279008A priority Critical patent/JP2003081509A/en
Publication of JP2003081509A publication Critical patent/JP2003081509A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a paper ejector that can suppress a curl caused by a correcting mechanism. SOLUTION: A contact/separation mechanism of a decurler follower roller 8 is so constructed that pressing springs 26 and bearings 27 are mounted on a bracket 28, a lever 30 is fixed on a shaft 31 projecting from the bracket 28 so as to connect to a hinge portion 29 of the bracket 28, and a contact/ separation solenoid 32 and a spring 33 are mounted on the lever 30. For a transfer material whose curl direction after fixing is a back curl, the contact/ separation solenoid 32 is set off, so that the spring 33 applies normal pressure to the decurler follower roller 8. For a transfer material whose curl direction after fixing is a face curl, the contact/separation solenoid 32 is set on before the transfer material passes a decurler mechanism, to exert force overcoming the force of the spring 33, so that the decurler follower roller 8 along with the bracket 28 is separated from the other rollers forming the decurler mechanism to exclude a downward depression of the transfer material P.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、画像形成装置内に
定着後の転写材のカールをローラ対にて矯正する機構を
有する排紙装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge device having a mechanism for correcting curl of a transfer material after fixing with a pair of rollers in an image forming apparatus.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来、
定着後の転写材のカールをローラ対にて矯正する機構を
有する画像形成装置であって、比較的高速で画像形成を
行う装置においては、画像形成速度に対してヒータの電
力が不足し、定着ローラ表面の温度維持が追いつかない
場合があり、画像形成中にローラ表面温度が降下してい
く。このため、少ない画像形成枚数においてはローラ表
面温度が高くなるため、排出後のカールが大きく、逆に
画像形成枚数が多くなり、ローラ表面温度が低くなって
いる場合、定着後の転写材のカール量が少なくなるため
矯正機構により通常カール方向と逆のカールを生じさ
せ、悪化させる方向となっていた。
2. Description of the Related Art Conventionally, the problems to be solved by the invention
An image forming apparatus having a mechanism for correcting the curl of the transfer material after fixing with a pair of rollers, and in an apparatus that forms an image at a relatively high speed, the electric power of the heater is insufficient with respect to the image forming speed, In some cases, the temperature of the roller surface cannot be kept up, and the roller surface temperature drops during image formation. For this reason, the roller surface temperature becomes high when the number of image forming sheets is small, so that the curl after discharge is large. Conversely, when the number of image forming sheets becomes large and the roller surface temperature is low, the curl of the transfer material after fixing is curled. Since the amount is small, the curl is caused by the straightening mechanism in the opposite direction to the normal curl direction, and the curling direction is deteriorated.

【0003】また従来、定着後の転写材のカールをロー
ラ対にて矯正する機構を有する画像形成装置において
は、転写材の画像形成終了後の待機時間が一定時間以上
の場合、給紙転写材積載部内の転写材が調湿され、排出
後のカールが大きくなり、逆に調湿時間が一定時間未満
となる場合、定着後の転写材のカール量が少なくなるた
め矯正機構により通常カール方向と逆のカールを生じさ
せ、悪化させる方向となった。
Conventionally, in an image forming apparatus having a mechanism for correcting the curl of the transfer material after fixing with a pair of rollers, when the waiting time after the completion of image formation of the transfer material is a certain time or more, the fed transfer material is fed. If the transfer material in the stacking unit is conditioned and the curl after discharge becomes large, and conversely the humidity control time is less than a certain time, the curl amount of the transfer material after fixing becomes small, so that the normal curl direction is set by the correction mechanism. The opposite curl was generated and it was in the direction of worsening.

【0004】さらに従来、定着後の転写材のカールをロ
ーラ対にて矯正する機構を有し、かつ給紙転写材積載部
近傍に転写材の除湿を行う除湿手段を有する画像形成装
置においては、除湿時間がある一定時間未満の場合、給
紙転写材積載部内の転写材の含水分が比較的多くなり、
排出後のカールが大きく、逆に除湿時間が一定時間以上
となる場合、定着後の転写材のカール量が少なくなるた
め矯正機構により通常カール方向と逆のカールを生じさ
せ、悪化させる方向となった。
Further, conventionally, in an image forming apparatus having a mechanism for correcting the curl of the transfer material after fixing with a pair of rollers and a dehumidifying means for dehumidifying the transfer material in the vicinity of the sheet feeding transfer material stacking portion, If the dehumidifying time is less than a certain time, the moisture content of the transfer material in the paper feeding transfer material stacking section becomes relatively large,
If the curl after discharge is large and conversely the dehumidification time is more than a certain time, the curl amount of the transfer material after fixing becomes small, so that the curling mechanism causes a curl opposite to the normal curl direction, which tends to worsen the curl. It was

【0005】したがって本発明の目的は、上記いずれの
場合でも矯正機構により作られるカールを抑えることが
可能な排紙装置を提供することである。
Therefore, an object of the present invention is to provide a paper discharge device capable of suppressing curl produced by the correction mechanism in any of the above cases.

【0006】[0006]

【課題を解決するための手段】本発明の請求項1に係る
排紙装置は、上記目的を達成するために、画像形成装置
内に定着後の転写材のカールをローラ対にて矯正する機
構を有し、該矯正機構はローラ対が接離可能またはロー
ラ対間の接圧力を変更可能であり、通紙時の定着ローラ
の表面温度により上記ローラ対の接離または接圧力を切
り替える手段を有することを特徴とする。
In order to achieve the above object, a paper discharge device according to claim 1 of the present invention is a mechanism for correcting a curl of a transfer material after fixing in an image forming apparatus by a roller pair. The straightening mechanism is capable of contacting and separating the roller pair or changing the contact pressure between the roller pair, and has means for switching the contacting and separating pressure or the contact pressure of the roller pair depending on the surface temperature of the fixing roller during sheet feeding. It is characterized by having.

【0007】同請求項2に係るものは、上記目的を達成
するために、画像形成装置内に定着後の転写材のカール
をローラ対にて矯正する機構を有し、該矯正機構はロー
ラ対が接離可能またはローラ対間の接圧力を変更可能で
あり、転写材の画像形成終了後の待機時間の長さにより
上記ローラ対の接離または接圧力を切り替える手段を有
することを特徴とする。
In order to achieve the above object, the invention according to claim 2 has a mechanism for correcting the curl of the transfer material after fixing with a roller pair in the image forming apparatus, and the correction mechanism has a roller pair. Is capable of contacting / separating or changing the contacting pressure between the roller pair, and has means for switching the contacting / separating or contacting pressure of the roller pair depending on the length of the waiting time after the image formation of the transfer material is completed. .

【0008】同請求項3に係るものは、上記目的を達成
するために、画像形成装置内に定着後の転写材のカール
をローラ対にて矯正する機構を有し、該矯正機構はロー
ラ対が接離可能またはローラ対間の接圧力を変更可能で
あり、かつ給紙転写材積載部近傍に転写材の除湿を行う
除湿手段を有し、該除湿手段の除湿時間により上記ロー
ラ対の接離または接圧力を切り替える手段を有すること
を特徴とする。
In order to achieve the above object, the invention according to claim 3 has a mechanism for correcting the curl of the transfer material after fixing with a roller pair in the image forming apparatus, and the correction mechanism has a roller pair. Can be contacted / separated or the contact pressure between the roller pairs can be changed, and a dehumidifying means for dehumidifying the transfer material is provided in the vicinity of the paper feeding transfer material stacking portion. It is characterized by having a means for switching the separation or contact pressure.

【0009】[0009]

【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。図1は、本発明に係る排装置を用い
る対象となる画像形成装置の一例を示す概念的断面図で
ある。読取系100によって読み取られた画像をもとに
書き込み系101が感光体102上に潜像をつくり、作
像系103によって感光体102上にトナーの可視像が
作られる。一方、給紙系104から供給された転写材P
は、作像系103まで運ばれる。作像系103にてトナ
ーの転写材Pへの画像転写が行われ、定着装置105で
画像定着が終了した転写材Pは、反転排出系106に運
ばれる。第1経路Iは画像形成装置外への転写材Pのス
トレート(通常)排出。第2経路IIは反転排出系10
6内で転写材Pを反転させて排出する。第3経路III
は反転排出系106内で転写材Pを反転させ、両面系1
07へ運び、再給紙、上記画像形成後に、第1経路Iに
て画像形成装置外へ排出させる。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual cross-sectional view showing an example of an image forming apparatus to which the discharge device according to the present invention is applied. The writing system 101 forms a latent image on the photoconductor 102 based on the image read by the reading system 100, and a visible image of toner is formed on the photoconductor 102 by the image forming system 103. On the other hand, the transfer material P supplied from the paper feeding system 104
Are carried to the image forming system 103. The image forming system 103 transfers the image of the toner onto the transfer material P, and the transfer material P on which the image fixing is completed by the fixing device 105 is conveyed to the reversal discharge system 106. The first path I is a straight (normal) discharge of the transfer material P to the outside of the image forming apparatus. The second route II is the reverse discharge system 10
The transfer material P is reversed in 6 and discharged. Third route III
Reverses the transfer material P in the reverse discharge system 106, and the double-sided system 1
The sheet is conveyed to 07, re-fed, and after the above-mentioned image formation, it is discharged to the outside of the image forming apparatus through the first path I.

【0010】図2に定着装置105と反転排出系106
及び両面系107の詳細と動作を示す。定着ローラ1に
は表面温度検知センサ2が取り付けられ、表面温度の検
知結果をもとに定着ヒータ3の点灯制御を行い、定着ロ
ーラ1表面の温度制御を行っている。
FIG. 2 shows a fixing device 105 and a reversal discharge system 106.
The details and operation of the double-sided system 107 are shown. The surface temperature detection sensor 2 is attached to the fixing roller 1, and the lighting of the fixing heater 3 is controlled based on the detection result of the surface temperature to control the temperature of the surface of the fixing roller 1.

【0011】定着ローラ1と加圧ローラ4からなる定着
ローラ対を通過した転写材Pは、定着分離爪5により定
着ローラ1から離され、定着出口コロ6、7を通り、デ
カラ駆動ローラ対(カール矯正機構)に運ばれる。デカ
ラローラ対8〜10を通過すると排紙分岐爪11の切り
替えにより、第1経路Iと第2、第3経路II、III
に分かれる。すなわち排紙分岐爪11の実線方向への切
り替えによって反転排出系106に運ばれ、破線方向の
切り替えにてストレート排出が行われる。
The transfer material P, which has passed through the fixing roller pair consisting of the fixing roller 1 and the pressure roller 4, is separated from the fixing roller 1 by the fixing separation claw 5, passes through the fixing outlet rollers 6 and 7, and the decal drive roller pair ( Curl correction mechanism). When passing through the pair of decal rollers 8 to 10, the first branch I and the second and third paths II and III are switched by switching the discharge branch claw 11.
Divided into That is, the discharge branch claw 11 is switched to the solid line direction to be conveyed to the reverse discharge system 106, and the straight discharge is performed by switching to the broken line direction.

【0012】今、排紙分岐爪11が実線方向に切り替わ
ると、排紙下ガイド板12、排紙中間ガイド板13間の
経路を経由して(第2経路II)、反転入口ガイド板1
4、15板間の経路に進入する。反転入口ガイド板14
には検知センサ16が付いており、転写材Pの進行方向
後端を検知する。反転分岐爪17先端は、上方向に圧が
かけられている。また、反転分岐爪17の先端は奥行き
方向に反転ローラ18の間に互い違いに入り込んでお
り、転写材Pが反転分岐爪17と反転ローラ18の間に
入ると、反転分岐爪17の圧力により、転写材Pが反転
ローラ18に押し付けられ、搬送力が出て搬送される。
Now, when the paper discharge branch claw 11 is switched in the direction of the solid line, the reverse entrance guide plate 1 is passed through the path between the paper discharge lower guide plate 12 and the paper discharge intermediate guide plate 13 (second path II).
Enter the path between plates 4 and 15. Reverse entrance guide plate 14
Has a detection sensor 16 for detecting the trailing end of the transfer material P in the traveling direction. The tip of the inversion branch claw 17 is pressed upward. Further, the tip end of the reversing branch claw 17 is staggered between the reversing rollers 18 in the depth direction, and when the transfer material P enters between the reversing branch claw 17 and the reversing roller 18, the pressure of the reversing branch claw 17 causes The transfer material P is pressed against the reversing roller 18 and is conveyed with a conveying force.

【0013】転写材P後端が反転分岐爪17を抜ける
と、検知センサ16の後端検知の情報をもとに逆転従動
コロ19が下に下がり(点線で示す)、逆転駆動ローラ
20とともに転写材Pを挟み込み、転写材Pの搬送方向
を逆転させる。転写材Pが搬送され、両面ローラ対2
1、22の間に挟まれると、逆転従動コロ19は元の実
線の位置まで戻る。転写材Pは、両面ローラ対21、2
2により搬送を行い、両面分岐爪23の切り替えによ
り、実線方向では第2経路II方向の反転排出、破線方
向では第3経路III経路の両面再給紙方向に搬送さ
れ、給紙グリップローラ対24、25を経て再給紙、両
面画像形成を行う。
When the trailing end of the transfer material P passes through the reversing branch claw 17, the reverse rotation driven roller 19 is lowered downward (shown by a dotted line) based on the information of the detection of the rear end of the detection sensor 16 and is transferred together with the reverse rotation driving roller 20. The material P is sandwiched and the conveying direction of the transfer material P is reversed. The transfer material P is conveyed, and the pair of double-sided rollers 2
When sandwiched between Nos. 1 and 22, the reverse rotation driven roller 19 returns to the original position indicated by the solid line. The transfer material P is a pair of double-sided rollers 21 and 2.
2, the double-sided branch claw 23 is switched to reversely discharge the second path II in the solid line direction and in the double-sided paper re-feeding direction of the third path III route in the broken line direction. , 25, re-feeding, and double-sided image formation is performed.

【0014】図3にデカラ部の進入側から見た詳細図
を、図4に転写材進入時のデカラの腰付けの詳細を示
す。デカラ入口駆動ローラ9とデカラ出口駆動ローラ1
0はローラが串団子状に互い違いになっており、デカラ
従動ローラ8は前後の長手方向にわたってローラを形成
している。デカラ従動ローラ8は加圧バネ26により軸
受27を介して下方向に圧が掛けられている。転写材P
がデカラローラ対に進入するとローラ8〜10に挟ま
れ、下方向に腰がつけられる。このようなデカラ構成
は、定着後の転写材Pのカール方向が特に下方向(バッ
クカール)となる時や、第2経路IIの反転排出経路を
通過する転写材Pのカールを矯正する時に特に効果を発
揮する構成である。
FIG. 3 shows a detailed view of the decal portion as seen from the entry side, and FIG. 4 shows the details of how the decal is stretched when the transfer material enters. Decara entrance drive roller 9 and Decara exit drive roller 1
In No. 0, the rollers are staggered in a skewered dumpling shape, and the decal driven roller 8 forms a roller in the front-rear longitudinal direction. The decal driven roller 8 is pressed downward by a pressure spring 26 via a bearing 27. Transfer material P
When they enter the pair of decal rollers, they are sandwiched by the rollers 8 to 10, and the waist is attached downward. Such a decal structure is particularly useful when the curl direction of the transfer material P after fixing is a downward direction (back curl) or when the curl of the transfer material P passing through the reverse discharge path of the second path II is corrected. It is a configuration that exerts an effect.

【0015】図5はデカラ従動ローラ8の接離機構の詳
細を示す。デカラ従動ローラ8はブラケット28に加圧
バネ26、軸受27とともに取り付けられ、ブラケット
28のヒンジ部29にはレバー30がブラケット28か
ら出ている軸31に固定されている。レバー30には接
離ソレノイド32と、他端にはバネ33が取り付けられ
ている。図中矢印Pは転写材Pの搬送方向を示す。
FIG. 5 shows details of the contacting / separating mechanism of the decal driven roller 8. The decal driven roller 8 is attached to a bracket 28 together with a pressure spring 26 and a bearing 27, and a lever 30 is fixed to a hinge portion 29 of the bracket 28 on a shaft 31 extending from the bracket 28. A contact / separation solenoid 32 is attached to the lever 30, and a spring 33 is attached to the other end. The arrow P in the figure indicates the conveyance direction of the transfer material P.

【0016】定着後のカール方向がバックカールとなる
転写材Pの場合、接離ソレノイド32はOFFしている
ため、バネ33により、デカラ従動ローラ8に通常の圧
力が掛かる。定着後のカール方向がフェースカールとな
る転写材Pの場合、転写材Pがデカラ機構を通過する前
に接離ソレノイド32をONし(図中矢印K方向に引
く)、バネ33の力に打ち勝つ力を働かせ、デカラ従動
ローラ8をブラケット28ごとデカラ入口駆動ローラ9
とデカラ出口駆動ローラ10から離し(図中矢印L方
向)転写材Pを下方向に腰を付けさせないようにする。
In the case of the transfer material P in which the curl direction after the fixing is the back curl, since the contact / separation solenoid 32 is off, the spring 33 applies a normal pressure to the decal driven roller 8. In the case of the transfer material P in which the curl direction after fixing is face curl, the contact / separation solenoid 32 is turned on (pulled in the arrow K direction in the figure) before the transfer material P passes through the decal mechanism, and the force of the spring 33 is overcome. By applying force, the decal driven roller 8 and the bracket 28 together with the decal inlet drive roller 9
Then, the transfer material P is separated from the decal exit driving roller 10 (in the direction of the arrow L in the drawing) so that the transfer material P does not bend downward.

【0017】図6は、温度検知センサ2にて検知された
定着ローラ1の表面温度をもとに行う動作のフローチャ
ートである。温度検知センサ2にて定着ローラ1の表面
温度を検知し(ステップ1)、表面温度が一定値以上で
あれば(ステップ2)、接離ソレノイド32をOFFし
(ステップ3)、デカラ従動ローラ8がデカラ入口駆動
ローラ9とデカラ出口駆動ローラ10に接する。一方、
定着ローラ1の表面温度が一定値未満であれば(ステッ
プ2)、接離ソレノイド32をONし(ステップ4)、
デカラ従動ローラ8をデカラ入口駆動ローラ9とデカラ
出口駆動ローラ10から離す。
FIG. 6 is a flowchart of an operation performed based on the surface temperature of the fixing roller 1 detected by the temperature detecting sensor 2. The surface temperature of the fixing roller 1 is detected by the temperature detection sensor 2 (step 1), and if the surface temperature is a certain value or more (step 2), the contact / separation solenoid 32 is turned off (step 3), and the decal driven roller 8 Contacts the decal inlet drive roller 9 and the decal outlet drive roller 10. on the other hand,
If the surface temperature of the fixing roller 1 is less than a certain value (step 2), the contact / separation solenoid 32 is turned on (step 4),
The decal driven roller 8 is separated from the decal inlet drive roller 9 and the decal outlet drive roller 10.

【0018】図7は、画像形成装置内に画像形成終了後
の待機時間を測定する測定手段を設け、待機時間をもと
に行う動作のフローチャートである。画像形成動作が終
了し(ステップ1)、待機時間が一定値以上であれば
(ステップ2)、接離ソレノイド32をOFFし(ステ
ップ3)、デカラ従動ローラ8がデカラ入口駆動ローラ
9とデカラ出口駆動ローラ10に接する。待機時間が一
定値未満であれば(ステップ2)、接離ソレノイド32
をONし(ステップ4)、デカラ従動ローラ8をデカラ
入口駆動ローラ9とデカラ出口駆動ローラ10から離
す。
FIG. 7 is a flow chart of an operation performed based on the waiting time by providing a measuring means for measuring the waiting time after completion of image formation in the image forming apparatus. When the image forming operation is completed (step 1) and the standby time is equal to or more than a certain value (step 2), the contact / separation solenoid 32 is turned off (step 3), and the decal driven roller 8 causes the decal inlet drive roller 9 and the decal outlet. Contact the drive roller 10. If the standby time is less than a certain value (step 2), the contact / separation solenoid 32
Is turned on (step 4) to separate the decal driven roller 8 from the decal inlet drive roller 9 and the decal outlet drive roller 10.

【0019】図8は、画像形成装置内の給紙系104に
転写材積載部近傍で転写材Pの除湿を行う除湿ヒータを
設け、この除湿ヒータの動作時間をもとに行う動作のフ
ローチャートである。除湿ヒータがONされており(ス
テップ1)、そのON時間が一定値以上であれば(ステ
ップ2)、接離ソレノイド32をONし(ステップ
3)、デカラ従動ローラ8をデカラ入口駆動ローラ9と
デカラ出口駆動ローラ10から離す。一定値未満であれ
ば接離ソレノイド32をOFFし、デカラ従動ローラ8
がデカラ入口駆動ローラ9とデカラ出口駆動ローラ10
に接する。
FIG. 8 is a flow chart of an operation performed based on the operating time of the dehumidifying heater, which is provided with a dehumidifying heater for dehumidifying the transfer material P in the vicinity of the transfer material stacking portion in the paper feeding system 104 in the image forming apparatus. is there. If the dehumidifying heater is turned on (step 1) and the ON time is equal to or more than a certain value (step 2), the contact / separation solenoid 32 is turned on (step 3), and the decal driven roller 8 is connected to the decal inlet drive roller 9. Separate from the decal exit drive roller 10. If it is less than a certain value, the contact / separation solenoid 32 is turned off, and the decal driven roller 8
Decal inlet drive roller 9 and decal outlet drive roller 10
Touch.

【0020】なお以上説明してきた実施形態では、カー
ル矯正機構であるデカラ機構のローラ対を接離させる例
のみ示したが、ローラ対を離間させるのでなく、ニップ
圧を弱くする制御を行ってもよい。
In the embodiment described above, only the example in which the roller pair of the decal mechanism which is the curl correcting mechanism is brought into contact with or separated from the roller pair, but the control of weakening the nip pressure is not performed instead of separating the roller pair. Good.

【0021】[0021]

【発明の効果】請求項1に係る排紙装置は、以上説明し
てきたように、通紙時の定着ローラの表面温度によりカ
ール矯正用のローラ対の接離または接圧力を切り替える
ことにより、定着ローラ表面温度が高くなるためのカー
ルの増大を抑え、かつ定着ローラ表面温度が比較的低い
時の矯正用のローラにより作られるカールを抑えること
が可能になるという効果がある。
As described above, the paper discharge device according to the first aspect of the invention fixes the fixing by switching the contact distance or contact pressure of the curl-correcting roller pair depending on the surface temperature of the fixing roller during paper passage. There is an effect that it is possible to suppress an increase in curl due to an increase in the roller surface temperature and to suppress a curl generated by the straightening roller when the fixing roller surface temperature is relatively low.

【0022】請求項2に係る排紙装置は、以上説明して
きたように、転写材の画像形成終了後の待機時間により
カール矯正用のローラ対の接離または接圧力を切り替え
ることにより、給紙される転写材の積載部内での調湿時
間が長くなることによるカールの増大を抑え、かつ調湿
時間が比較的短い場合の矯正用のローラにより作られる
カールを抑えることが可能になるという効果がある。
As described above, the sheet discharging device according to the second aspect of the invention discharges the sheet by switching the contact and separation or contact pressure of the curl correcting roller pair depending on the waiting time after the image formation of the transfer material is completed. It is possible to suppress an increase in curl due to a longer humidity control time in the stacking portion of the transfer material to be transferred, and to suppress a curl generated by a correction roller when the humidity control time is relatively short. There is.

【0023】請求項3に係る排紙装置は、以上説明して
きたように、給紙転写材積載部近傍の除湿手段の動作時
間によりカール矯正用のローラ対の接離または接圧力を
切り替えることにより、除湿時間が比較的短い場合のカ
ールの増大を抑え、除湿時間が長くなることによる場合
の矯正用のローラにより作られるカールを抑えることが
可能になるという効果がある。
As described above, the paper discharge device according to the third aspect of the present invention changes the contact or separation or contact pressure of the curl-correcting roller pair depending on the operation time of the dehumidifying means in the vicinity of the sheet transfer material stacking portion. There is an effect that it is possible to suppress an increase in curl when the dehumidifying time is relatively short, and to suppress a curl generated by the correction roller when the dehumidifying time is long.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る排装置を用いる対象となる画像形
成装置の一例を示す概念的断面図である。
FIG. 1 is a conceptual cross-sectional view showing an example of an image forming apparatus to which a discharge device according to the present invention is applied.

【図2】図1の定着装置と反転排出系及び両面系を示す
拡大断面図である。
FIG. 2 is an enlarged cross-sectional view showing the fixing device of FIG. 1, a reverse discharge system, and a double-sided system.

【図3】図2に示すデカラ部の進入側から見た詳細図で
ある。
FIG. 3 is a detailed view of the decal portion shown in FIG. 2 as seen from the entry side.

【図4】図2に示すデカラ部への転写材進入時の腰付け
の詳細図である。
FIG. 4 is a detailed view of forming the transfer material when the transfer material enters the decal portion shown in FIG.

【図5】図2に示すデカラ部のデカラ従動ローラの接離
機構を示す斜視図である。
5 is a perspective view showing a contacting / separating mechanism of a decala driven roller of the decal portion shown in FIG. 2. FIG.

【図6】温度検知センサにて検知された定着ローラの表
面温度をもとに行う動作のフローチャートである。
FIG. 6 is a flowchart of an operation performed based on the surface temperature of the fixing roller detected by the temperature detection sensor.

【図7】画像形成装置内に画像形成終了後の待機時間を
測定する測定手段を設け、待機時間をもとに行う動作の
フローチャートである。
FIG. 7 is a flowchart of an operation performed based on the waiting time by providing a measuring unit for measuring the waiting time after the image formation is completed in the image forming apparatus.

【図8】画像形成装置内の給紙系に転写材の除湿を行う
除湿ヒータを設け、この除湿ヒータの動作時間をもとに
行う動作のフローチャートである。
FIG. 8 is a flowchart of an operation performed by providing a dehumidifying heater for dehumidifying a transfer material in a sheet feeding system in the image forming apparatus and based on an operating time of the dehumidifying heater.

【符号の説明】[Explanation of symbols]

100 読取系 101 書き込み系 102 感光体 103 作像系 104 給紙系 105 定着装置 106 反転排出系 107 両面系 I 第1経路 II 第2経路 III 第3経路 P 転写材 1 定着ローラ 2 表面温度検知センサ 3 定着ヒータ 4 加圧ローラ 5 定着分離爪 6、7 定着出口コロ 8 デカラ従動ローラ 9 デカラ入口駆動ローラ 10 デカラ出口駆動ローラ 11 排紙分岐爪 12 排紙下ガイド板 13 排紙中間ガイド板 14、15 反転入口ガイド板 16 検知センサ 17 反転分岐爪 18 反転ローラ 19 逆転従動コロ 20 逆転駆動ローラ 21、22 両面ローラ対 23 両面分岐爪 24、25 給紙グリップローラ対 26 加圧バネ 27 軸受 28 ブラケット 29 ヒンジ部 30 レバー 31 軸 32 接離ソレノイド 33 バネ 100 reading system 101 Writing system 102 photoconductor 103 Image system 104 paper feed system 105 fixing device 106 Reversed discharge system 107 double sided I First route II Route 2 III Third route P transfer material 1 fixing roller 2 Surface temperature detection sensor 3 fixing heater 4 pressure roller 5 fixing separation claw 6, 7 Fixing exit roller 8 Decara driven roller 9 Decara entrance drive roller 10 Decara exit drive roller 11 Paper output branch claws 12 Paper ejection bottom guide plate 13 Output intermediate guide plate 14, 15 Reverse entrance guide plate 16 detection sensor 17 Reversed branch claw 18 Reverse roller 19 Reverse driven roller 20 Reverse drive roller 21, 22 Double-sided roller pair 23 Double-sided branch claw 24, 25 paper feed grip roller pair 26 Pressure spring 27 bearings 28 bracket 29 Hinge part 30 levers 31 axis 32 Solenoid solenoid 33 spring

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 画像形成装置内に定着後の転写材のカー
ルをローラ対にて矯正する機構を有し、該矯正機構はロ
ーラ対が接離可能またはローラ対間の接圧力を変更可能
であり、通紙時の定着ローラの表面温度により上記ロー
ラ対の接離または接圧力を切り替える手段を有すること
を特徴とする排紙装置。
1. An image forming apparatus has a mechanism for correcting curl of a transfer material after fixing with a roller pair, and the correction mechanism is capable of contacting and separating the roller pair or changing a contact pressure between the roller pair. A sheet discharging device, which has means for switching contact and separation or contact pressure of the roller pair depending on the surface temperature of the fixing roller during sheet passing.
【請求項2】 画像形成装置内に定着後の転写材のカー
ルをローラ対にて矯正する機構を有し、該矯正機構はロ
ーラ対が接離可能またはローラ対間の接圧力を変更可能
であり、転写材の画像形成終了後の待機時間の長さによ
り上記ローラ対の接離または接圧力を切り替える手段を
有することを特徴とする排紙装置。
2. The image forming apparatus has a mechanism for correcting the curl of the transfer material after fixing with a roller pair, and the correction mechanism is capable of contacting and separating the roller pair or changing the contact pressure between the roller pair. A sheet discharging device, characterized by having means for switching contact / separation or contact pressure of the roller pair depending on the length of waiting time after the image formation of the transfer material is completed.
【請求項3】 画像形成装置内に定着後の転写材のカー
ルをローラ対にて矯正する機構を有し、該矯正機構はロ
ーラ対が接離可能またはローラ対間の接圧力を変更可能
であり、かつ給紙転写材積載部近傍に転写材の除湿を行
う除湿手段を有し、該除湿手段の除湿時間により上記ロ
ーラ対の接離または接圧力を切り替える手段を有するこ
とを特徴とする排紙装置。
3. An image forming apparatus has a mechanism for correcting curl of a transfer material after fixing with a roller pair, and the correction mechanism is capable of contacting and separating the roller pair or changing a contact pressure between the roller pair. And a dehumidifying means for dehumidifying the transfer material in the vicinity of the sheet-feeding transfer material stacking portion, and means for switching contact / separation or contact pressure of the roller pair depending on the dehumidifying time of the dehumidifying means. Paper equipment.
JP2001279008A 2001-09-14 2001-09-14 Paper ejector Pending JP2003081509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001279008A JP2003081509A (en) 2001-09-14 2001-09-14 Paper ejector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001279008A JP2003081509A (en) 2001-09-14 2001-09-14 Paper ejector

Publications (1)

Publication Number Publication Date
JP2003081509A true JP2003081509A (en) 2003-03-19

Family

ID=19103278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001279008A Pending JP2003081509A (en) 2001-09-14 2001-09-14 Paper ejector

Country Status (1)

Country Link
JP (1) JP2003081509A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010038984A (en) * 2008-07-31 2010-02-18 Fujitsu Ltd Image forming apparatus
JP2020117402A (en) * 2015-06-09 2020-08-06 株式会社リコー Image formation apparatus
CN111633455A (en) * 2020-06-30 2020-09-08 东莞市超业精密设备有限公司 Press from both sides material equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010038984A (en) * 2008-07-31 2010-02-18 Fujitsu Ltd Image forming apparatus
JP2020117402A (en) * 2015-06-09 2020-08-06 株式会社リコー Image formation apparatus
CN111633455A (en) * 2020-06-30 2020-09-08 东莞市超业精密设备有限公司 Press from both sides material equipment

Similar Documents

Publication Publication Date Title
JPH0776122A (en) Image forming device
JPH063900A (en) Image forming device
JP2003081509A (en) Paper ejector
JP2014206607A (en) Image forming apparatus, and conveying device
JP2006071803A (en) Image forming apparatus and image forming method
JP3919451B2 (en) Image forming apparatus
JP3634158B2 (en) Sheet conveying apparatus and image forming apparatus
JP2004338918A (en) Paper folding method, paper folding device, and image forming device
JP4289095B2 (en) Image forming apparatus
JP3544279B2 (en) Image forming device
JP2002274730A (en) Image forming device, printer and copying machine
JP2018140869A (en) Image forming apparatus
JP3647649B2 (en) Sheet curl correction apparatus and image forming apparatus
JP2001097622A (en) Image forming device
JP3940882B2 (en) Sheet reversing device
JPH11212307A (en) Both-side image forming device
JP3952123B2 (en) Sheet reversing device
JP3935313B2 (en) Sheet conveying apparatus and image forming apparatus equipped with the same
JP4042221B2 (en) Image forming apparatus
JP2004085624A (en) Image forming apparatus
JP2022179900A (en) Fixing device and image forming apparatus
JP2003280439A (en) Fixing device and image forming apparatus
JPH09188460A (en) Sheet material conveyance device and image forming device
JP4706606B2 (en) Image forming apparatus
JPH1124334A (en) Reversing device