JP2008222427A

JP2008222427A - Recording medium carrying device and image forming device

Info

Publication number: JP2008222427A
Application number: JP2007067293A
Authority: JP
Inventors: Nobuyuki Shimodaira; 信幸下平
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2007-03-15
Filing date: 2007-03-15
Publication date: 2008-09-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium carrying device for preventing damage to a recording image and a carrying failure of a recording medium by a simple and inexpensive constitution for correcting a curl of the recording medium. <P>SOLUTION: This recording medium carrying device has a guide means 1 sending out an entering recording object medium P into a carrying passage, a cylindrical decurl roller 2 correcting the curl of the recording medium on the guide means 1, a curved surface 3 having a curvature larger than the outer peripheral surface of the decurl roller 2 formed on the guide means 1 opposed to the outer peripheral surface of the decurl roller 2, a clearance 4 of the recording medium P formed of the curved surface 3 and the outer peripheral surface of the decurl roller 2, and a rotational driving means 5 rotatively driving the decurl roller 2 sending out the recording object medium P in the clearance 4 toward the carrying direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、記録媒体搬送装置、及びその記録媒体搬送装置を備える画像形成装置に関し、詳しくは、記録媒体を搬送方向に案内して搬送する記録媒体搬送装置に関する。更にその記録媒体搬送装置を備えて記録媒体に記録画像を形成すインクジェット方式などの印刷機や電子写真方法で画像を形成する複写機、ファクシミリ装置、プリンタあるいはこれ等の複合機等の画像形成装置に関する。 The present invention relates to a recording medium conveyance device and an image forming apparatus including the recording medium conveyance device, and more particularly to a recording medium conveyance device that guides and conveys a recording medium in a conveyance direction. Further, an image forming apparatus such as an inkjet type printing machine that forms a recorded image on a recording medium with the recording medium conveying apparatus, a copying machine that forms an image by an electrophotographic method, a facsimile apparatus, a printer, or a complex machine thereof. About.

従来の記録媒体搬送装置、及びその記録媒体搬送装置を備える画像形成装置において、画像形成装置の熱定着ユニットから搬送方向に案内して搬送される記録媒体の記録用紙は、定着部において加熱されるため記録用紙全体にカールが発生する。
熱定着ユニットを通過する記録用紙は程度の差はあれ、このようなカールが発生し、記録用紙の種類やサイズによってはカール量の差も発生してしまう。そのために画像形成装置から排紙トレイ又は後処理系のユニット等に記録用紙が搬送されると、途中の搬送ガイドやサイドフェンス等にひっかかりジャムの原因となり、搬送不良となってしまう。また、ジャムにまでは至らないとしても最終的に排出された際に記録用紙の耳折れ等となって記録用紙がスタックされる搬送不良を起こす。
そこで、記録シート冷却装置を用いて、熱定着装置で画像を定着した記録シートを冷却すること、即ち記録シート冷却装置内における記録シートの搬送経路にヒートパイプを設置して、カールやブロッキング現象の発生を防止することが提案されている（特許文献１を参照）。
更に、定着部から送り出される記録紙を、排紙ローラと板バネとの当接部に搬送して、記録紙を板バネにより排紙ローラに押し付け、排紙ローラの回転により排紙部に搬送することも知られている。つまり板バネの排紙ローラ側に形成されている湾曲部により、記録紙をカール方向と逆方向に湾曲させつつ、排紙ローラに押し付けて搬送して、記録紙についたカールぐせを矯正する画像形成装置も提案されている（特許文献２を参照）。
更に、定着領域を通過した後の記録シート搬送路中のカール矯正領域に回転中空パイプおよび弾性回転部材を配置して、その回転中空パイプおよび弾性回転部材の圧接領域を通過させることで記録シートのカールを矯正する画像形成装置も提案されている（特許文献３を参照）。 In a conventional recording medium conveying apparatus and an image forming apparatus including the recording medium conveying apparatus, a recording sheet of a recording medium conveyed while being guided in a conveying direction from a heat fixing unit of the image forming apparatus is heated in a fixing unit. Therefore, curling occurs on the entire recording paper.
Such a curl occurs to some extent on the recording paper passing through the heat fixing unit, and a curl amount difference also occurs depending on the type and size of the recording paper. For this reason, when the recording paper is transported from the image forming apparatus to a paper discharge tray or a post-processing unit, the recording paper is caught on a transport guide, a side fence, or the like on the way, causing a jam and causing a transport failure. Further, even if it does not reach the jam, when the paper is finally discharged, the recording paper will be folded or the like, causing a conveyance failure in which the recording paper is stacked.
Therefore, the recording sheet cooling device is used to cool the recording sheet on which the image has been fixed by the heat fixing device, that is, a heat pipe is installed in the recording sheet conveyance path in the recording sheet cooling device to prevent curling or blocking phenomenon. It has been proposed to prevent the occurrence (see Patent Document 1).
Further, the recording paper fed from the fixing unit is conveyed to the contact portion between the paper discharge roller and the plate spring, the recording paper is pressed against the paper discharge roller by the plate spring, and is conveyed to the paper discharge unit by the rotation of the paper discharge roller. It is also known to do. In other words, the curved portion formed on the paper discharge roller side of the leaf spring curls the recording paper in the direction opposite to the curl direction, and presses and conveys the recording paper to correct the curl on the recording paper. A forming apparatus has also been proposed (see Patent Document 2).
Further, the rotating hollow pipe and the elastic rotating member are arranged in the curl correction area in the recording sheet conveyance path after passing through the fixing area, and the recording sheet is passed through the pressure contact area of the rotating hollow pipe and the elastic rotating member. An image forming apparatus that corrects curl has also been proposed (see Patent Document 3).

更に、トナー像を加熱と加圧により定着されたシートを排出するシート排出装置において、シートに担持されているトナー像に対向当接する側のローラを有している。トナー像側に位置するローラの周方向に並置された状態でローラの周面に当接可能であり、トナー像側に対向するローラの周面に倣ってシートを挟持搬送可能な複数のバックアップローラも有している。そして、シートに発生しているカールの発生方向と逆方向にシートを湾曲させてカールを矯正するデカール機構を備え、デカール機構を構成するローラの１つが冷却部材で構成されて、シートのカールを矯正することも提案されている（特許文献４を参照）。
更に、剛性ローラおよび剛性ローラに対向する弾性ローラによって形成されるニップ部とニップ部の下流側にて用紙をガイドする搬送ガイド部材で用紙のカールを修正するカール修正方法がある。そこで、カールが生じやすい薄紙が搬送される場合には、ニップ部から搬送ガイド部材の傾斜ガイド部への排出角度をきつくして用紙をカールとは逆方向にひねることによりカールを修正する。カールが生じにくい厚紙が搬送される場合には、ニップ部から傾斜ガイド部への排出角度を緩くして、用紙の搬送抵抗を低くすることも提案されている（特許文献５を参照）。
然し、これらは何れも、記録媒体の記録用紙のカールを矯正して搬送する構成が複雑で高価である。そして、記録用紙は当接する板バネ等のガイド部材と排紙ローラ、剛性ローラと弾性ローラ等によって搬送されるので、記録用紙に形成される記録画像の損傷や記録用紙の搬送不良が発生する不具合が生じていた。
特開平４−２６００６５号公報特開平９−４０２５７号公報特開２０００−２２６１４９公報特開２００３−７３００６公報特開２００６−１６８９４０公報 Further, in the sheet discharge device for discharging the sheet on which the toner image is fixed by heating and pressurization, the sheet discharge device has a roller on the side facing the toner image carried on the sheet. A plurality of backup rollers that can come into contact with the circumferential surface of the roller positioned side by side in the circumferential direction of the roller located on the toner image side, and can sandwich and convey the sheet along the circumferential surface of the roller facing the toner image side Also have. A decurling mechanism that corrects the curl by curving the sheet in a direction opposite to the direction in which the curl is generated on the sheet is provided, and one of the rollers constituting the decurling mechanism is configured by a cooling member, and curling of the sheet is performed. Correction has also been proposed (see Patent Document 4).
Further, there is a curl correcting method in which a paper curl is corrected by a nip portion formed by a rigid roller and an elastic roller facing the rigid roller, and a conveyance guide member that guides the paper downstream of the nip portion. Therefore, when thin paper that is likely to be curled is conveyed, the curl is corrected by twisting the paper in the direction opposite to the curl by tightly adjusting the discharge angle from the nip portion to the inclined guide portion of the conveyance guide member. In the case of transporting thick paper that does not easily curl, it has also been proposed to reduce the paper transport resistance by relaxing the discharge angle from the nip portion to the inclined guide portion (see Patent Document 5).
However, both of these are complicated and expensive in the configuration in which the curl of the recording paper of the recording medium is corrected and conveyed. Since the recording paper is conveyed by a guide member such as a plate spring and a paper discharge roller, a rigid roller and an elastic roller, etc., which contact the recording paper, the recording image formed on the recording paper is damaged or the recording paper is poorly conveyed. Has occurred.
JP-A-4-260065 Japanese Patent Laid-Open No. 9-40257 JP 2000-226149 A JP 2003-73006 A JP 2006-168940 A

従来の記録媒体搬送装置、及びその記録媒体搬送装置を備える画像形成装置においては、記録媒体の記録用紙のカールを矯正して搬送する構成が複雑で高価である。そして、記録用紙は当接する板バネ等のガイド部材と排紙ローラ、又は剛性ローラと弾性ローラ等によって搬送されるので、記録用紙に形成される記録画像の損傷や記録用紙の搬送不良が発生すると言う問題が発生していた。
そこで、本発明は、このような問題点を解決するものである。即ち、記録媒体のカールを矯正する構成が簡単で安価で記録画像の損傷や記録媒体の搬送不良の発生を防止する記録媒体搬送装置を提供することを目的とする。またその記録媒体搬送装置を備える画像形成装置を提供することも目的とする。 In a conventional recording medium conveyance device and an image forming apparatus including the recording medium conveyance device, a configuration for correcting and conveying the curl of the recording paper of the recording medium is complicated and expensive. Since the recording paper is conveyed by a guide member such as a leaf spring and a paper discharge roller, or a rigid roller and an elastic roller, which is in contact with the recording paper, if the recording image formed on the recording paper is damaged or the recording paper is poorly conveyed. There was a problem to say.
Therefore, the present invention solves such problems. That is, an object of the present invention is to provide a recording medium transport apparatus that has a simple and inexpensive configuration for correcting the curl of the recording medium and prevents the occurrence of damage to the recorded image and the defective transport of the recording medium. Another object of the present invention is to provide an image forming apparatus provided with the recording medium conveying apparatus.

上記目的を達成するために、請求項１に記載の本発明は、記録媒体を搬送する記録媒体搬送装置において、進入する記録媒体を搬送経路内へと送り出す案内手段と、前記案内手段上の記録媒体のカールを修正する円筒状のデカールローラと、前記デカールローラの外周面と対向する前記案内手段上に形成された前記デカールローラの外周面より大きい曲率を有する湾曲面と、前記湾曲面と前記デカールローラの外周面とにより形成された間隙部と、前記間隙部内の記録媒体を搬送方向に送り出す前記デカールローラを回転駆動する回転駆動手段と、を備える記録媒体搬送装置を特徴とする。
請求項２に記載の本発明は、請求項１に記載の記録媒体搬送装置において、前記案内手段は、記録媒体を搬送方向に案内する搬送ガイド板と、前記搬送ガイド板と対向して記録媒体を搬送方向に案内する対向ガイド板とを備える記録媒体搬送装置を特徴とする。
請求項３に記載の本発明は、請求項１又は２に記載の記録媒体搬送装置において、前記案内手段は、搬送経路内の記録媒体との当接部を覆うテフロン層を備える記録媒体搬送装置を特徴とする。
請求項４に記載の本発明は、請求項１、２又は３に記載の記録媒体搬送装置において、前記案内手段は、冷却用のフィンを備える記録媒体搬送装置を特徴とする。
請求項５に記載の本発明は、請求項１乃至４の何れか一項に記載の記録媒体搬送装置において、前記案内手段を冷却するファンを備える記録媒体搬送装置を特徴とする。
請求項６に記載の本発明は、請求項１乃至５の何れか一項に記載の記録媒体搬送装置において、前記案内手段は、進入する記録媒体を加熱する加熱手段を備える記録媒体搬送装置を特徴とする。
請求項７に記載の本発明は、請求項６に記載の記録媒体搬送装置において、前記加熱手段は、記録媒体上に形成したトナー画像を熱定着する熱定着ユニットを備える記録媒体搬送装置を特徴とする。 In order to achieve the above object, the present invention as claimed in claim 1 is a recording medium conveying apparatus for conveying a recording medium, a guiding means for feeding an entering recording medium into a conveying path, and a recording on the guiding means. A cylindrical decurling roller for correcting curl of the medium, a curved surface having a curvature larger than the outer peripheral surface of the decurling roller formed on the guide means facing the outer peripheral surface of the decurling roller, the curved surface, A recording medium conveying apparatus comprising: a gap formed by an outer peripheral surface of the decal roller; and a rotation driving unit that rotationally drives the decurling roller that feeds the recording medium in the gap in the conveying direction.
According to a second aspect of the present invention, in the recording medium conveying apparatus according to the first aspect, the guide means includes a conveying guide plate that guides the recording medium in a conveying direction, and a recording medium facing the conveying guide plate. And a counter guide plate for guiding the recording medium in the transport direction.
According to a third aspect of the present invention, in the recording medium conveying apparatus according to the first or second aspect, the guide means includes a Teflon layer that covers a contact portion with the recording medium in the conveying path. It is characterized by.
According to a fourth aspect of the present invention, there is provided the recording medium conveying apparatus according to the first, second, or third aspect, wherein the guide means includes a cooling fin.
According to a fifth aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to fourth aspects, the recording medium conveying apparatus includes a fan that cools the guide means.
According to a sixth aspect of the present invention, there is provided the recording medium conveying apparatus according to any one of the first to fifth aspects, wherein the guide unit includes a heating unit that heats the entering recording medium. Features.
According to a seventh aspect of the present invention, in the recording medium conveying apparatus according to the sixth aspect, the heating unit includes a thermal fixing unit that thermally fixes a toner image formed on the recording medium. And

請求項８に記載の本発明は、請求項１乃至７の何れか一項に記載の記録媒体搬送装置において、前記案内手段は、進入する記録媒体を排紙する排紙ローラを備える記録媒体搬送装置を特徴とする。
請求項９に記載の本発明は、請求項１乃至８の何れか一項に記載の記録媒体搬送装置において、前記案内手段は、前記湾曲面を前記デカールローラの外周面から離間して記録媒体のカールを修正するデカール機能の調整又はデカール機能を解除するデカール機能調整手段を備える記録媒体搬送装置を特徴とする。
請求項１０に記載の本発明は、請求項９に記載の記録媒体搬送装置において、前記デカール機能調整手段は、支点を中心にして回動可能に保持される回動ガイド板を備える記録媒体搬送装置を特徴とする。
請求項１１に記載の本発明は、請求項１０に記載の記録媒体搬送装置において、前記回動ガイド板は、支点を中心にして回動位置に回動駆動する回動駆動手段を備える記録媒体搬送装置を特徴とする。
請求項１２に記載の本発明は、請求項１１に記載の記録媒体搬送装置において、前記回動駆動手段は、前記回動ガイド板を回動位置に回動して保持するカム部材と、前記カム部材を回動駆動するソレノイドを備える記録媒体搬送装置を特徴とする。
請求項１３に記載の本発明は、請求項１乃至１２の何れか一項に記載の記録媒体搬送装置において、前記デカールローラは、外周面を覆うテフロン層を備える記録媒体搬送装置を特徴とする。
請求項１４に記載の本発明は、請求項１乃至１３の何れか一項に記載の記録媒体搬送装置において、前記デカールローラは、外周面の中間に記録媒体に当接して搬送する摩擦部を備える記録媒体搬送装置を特徴とする。
請求項１５に記載の本発明は、請求項１４に記載の記録媒体搬送装置において、前記摩擦部は、護謨面を備える記録媒体搬送装置を特徴とする。 According to an eighth aspect of the present invention, there is provided the recording medium conveying apparatus according to any one of the first to seventh aspects, wherein the guide means includes a discharge roller that discharges an entering recording medium. Features the device.
According to a ninth aspect of the present invention, there is provided the recording medium conveying apparatus according to any one of the first to eighth aspects, wherein the guide means separates the curved surface from the outer peripheral surface of the decurling roller. And a decurling function adjusting means for adjusting the decurling function for correcting the curling or canceling the decurling function.
According to a tenth aspect of the present invention, in the recording medium conveyance device according to the ninth aspect, the decurling function adjusting means includes a rotation guide plate that is rotatably held around a fulcrum. Features the device.
According to an eleventh aspect of the present invention, there is provided the recording medium conveying apparatus according to the tenth aspect, wherein the rotation guide plate includes a rotation drive unit that rotates to a rotation position about a fulcrum. Features a transport device.
According to a twelfth aspect of the present invention, in the recording medium conveying apparatus according to the eleventh aspect, the rotation driving unit includes a cam member that rotates and holds the rotation guide plate at a rotation position, and A recording medium conveyance device including a solenoid that rotationally drives a cam member is characterized.
According to a thirteenth aspect of the present invention, in the recording medium conveyance device according to any one of the first to twelfth aspects, the decurling roller includes a Teflon layer that covers an outer peripheral surface. .
According to a fourteenth aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to thirteenth aspects, the decurling roller includes a friction portion that abuts against and conveys the recording medium in the middle of the outer peripheral surface. The recording medium conveying apparatus is provided.
According to a fifteenth aspect of the present invention, in the recording medium conveyance device according to the fourteenth aspect, the friction portion is a recording medium conveyance device having a protective surface.

請求項１６に記載の本発明は、請求項１４に記載の記録媒体搬送装置において、前記摩擦部材は、凹凸面を備える記録媒体搬送装置を特徴とする。
請求項１７に記載の本発明は、請求項１乃至１６の何れか一項に記載の記録媒体搬送装置において、前記デカールローラは、冷却用の中空部を備える記録媒体搬送装置を特徴とする。
請求項１８に記載の本発明は、請求項１乃至１７の何れか一項に記載の記録媒体搬送装置において、前記間隙部は、前記案内手段が搬送経路内の搬送方向に案内して送り出す記録媒体の厚さよりも広く、記録媒体の厚さに加算する０．１ｍｍよりも狭い空間を備える記録媒体搬送装置を特徴とする。
請求項１９に記載の本発明は、請求項１乃至１８の何れか一項に記載の記録媒体搬送装置において、前記回転駆動手段は、前記デカールローラと連動して記録媒体を搬送方向に送り出す前記排紙ローラを回転駆動する連動部材を備える記録媒体搬送装置を特徴とする。
請求項２０に記載の本発明は、記録媒体に記録画像を形成する画像形成装置において、搬送される記録媒体に記録画像を形成する画像形成ユニットと、前記画像形成ユニットで記録画像を形成した記録媒体を搬送方向に案内して搬送する請求項１乃至１９の何れか一項に記載の前記記録媒体搬送装置を備える画像形成装置を特徴とする。 According to a sixteenth aspect of the present invention, in the recording medium conveyance device according to the fourteenth aspect, the friction member is a recording medium conveyance device having an uneven surface.
According to a seventeenth aspect of the present invention, in the recording medium conveyance device according to any one of the first to sixteenth aspects, the decurling roller includes a recording medium conveyance device including a cooling hollow portion.
The present invention according to claim 18 is the recording medium conveying apparatus according to any one of claims 1 to 17, wherein the gap portion is a recording that the guide means guides in the conveying direction in the conveying path and is sent out. It is characterized by a recording medium conveying apparatus having a space wider than the medium thickness and smaller than 0.1 mm added to the recording medium thickness.
According to a nineteenth aspect of the present invention, in the recording medium conveyance device according to any one of the first to eighteenth aspects, the rotation driving unit sends the recording medium in a conveyance direction in conjunction with the decurling roller. A recording medium conveyance device including an interlocking member that rotationally drives a paper discharge roller is characterized.
According to a twenty-second aspect of the present invention, there is provided an image forming apparatus for forming a recorded image on a recording medium, an image forming unit for forming a recorded image on a conveyed recording medium, and a recording in which a recorded image is formed by the image forming unit. An image forming apparatus including the recording medium conveyance device according to any one of claims 1 to 19, wherein the medium is guided and conveyed in a conveyance direction.

本発明によれば、記録媒体のカールを矯正する構成が簡単で安価で記録画像の損傷や記録媒体の搬送不良の発生を防止する記録媒体搬送装置を提供することが出来る。及びその記録媒体搬送装置を備える画像形成装置も提供することが出来る。 According to the present invention, it is possible to provide a recording medium transport apparatus that has a simple and inexpensive configuration that corrects curling of a recording medium and that prevents damage to a recorded image and occurrence of defective transport of the recording medium. In addition, an image forming apparatus including the recording medium conveyance device can also be provided.

以下に、本発明の実施形態を、図面を参照して詳細に説明する。
図１は、本発明の実施の形態にかかる記録媒体搬送装置１０の基本構成図である。図２は、本発明の実施の形態にかかる記録媒体搬送装置１０の間隙部４の基本構成の拡大図である。
図１と図２において、記録媒体を搬送方向に案内して搬送する記録媒体搬送装置１０は、進入する記録媒体Ｐの記録用紙を搬送経路内の図示の矢印（Ａ）方向の搬送方向に案内して搬送して送り出す案内手段１を備えている。案内手段１は、記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に確実に案内して搬送して送り出す搬送ガイド板１１と、その搬送ガイド板１１と対向して記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に確実に案内して搬送して送り出す対向ガイド板１２よりなる。
案内手段１の搬送ガイド板１１と対向ガイド板１２は、剛性の板金であって熱容量の大きい鉄材等の金属板であり、冷却効果をより向上させるようになっている。
更に、搬送ガイド板１１上の記録媒体Ｐのカールを修正する円筒状のデカールローラ２と、デカールローラ２の外周面と対向するガイド板１１上に形成するデカールローラ２の外周面より大きい曲率を有する湾曲面３を備えている。
デカールローラ２は、剛性のローラであって熱容量の大きい鉄材等の金属ローラであり、冷却効果をより向上させるようになっている。
更に、湾曲面３とデカールローラ２の外周面とにより記録媒体Ｐの搬送経路を形成する間隙部４を備えている。
更に、間隙部４内の記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に送り出すデカールローラ２を回転駆動する回転駆動手段５を備えている。 Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a basic configuration diagram of a recording medium transport apparatus 10 according to an embodiment of the present invention. FIG. 2 is an enlarged view of the basic configuration of the gap 4 of the recording medium transport apparatus 10 according to the embodiment of the present invention.
1 and 2, a recording medium transport apparatus 10 that guides and transports a recording medium in the transport direction guides the recording paper of the recording medium P that enters the transport medium in the transport direction indicated by the arrow (A) in the transport path. Then, a guide means 1 for conveying and sending out is provided. The guiding means 1 reliably guides the recording medium P in the conveying direction indicated by the arrow (A), conveys the recording medium P, and feeds the recording medium P facing the conveying guide plate 11. It consists of a counter guide plate 12 that reliably guides, conveys and sends out in the conveying direction of the arrow (A).
The conveyance guide plate 11 and the counter guide plate 12 of the guide means 1 are rigid metal plates such as iron materials having a large heat capacity so as to further improve the cooling effect.
Further, the cylindrical decurling roller 2 for correcting the curling of the recording medium P on the conveying guide plate 11 and a curvature larger than the outer peripheral surface of the decurling roller 2 formed on the guide plate 11 opposed to the outer peripheral surface of the decurling roller 2. The curved surface 3 is provided.
The decurling roller 2 is a rigid roller and a metal roller such as an iron material having a large heat capacity, and further improves the cooling effect.
Further, a gap 4 is provided that forms a conveyance path for the recording medium P by the curved surface 3 and the outer peripheral surface of the decurling roller 2.
Further, a rotation driving means 5 is provided for rotating the decurling roller 2 that feeds the recording medium P in the gap 4 in the conveying direction indicated by the arrow (A) in the figure.

案内手段１は、進入する記録媒体Ｐを加熱する加熱手段６の熱定着ユニット１１５を備えている。熱定着ユニット１１５は、図示の矢印（Ｂ）方向に回転する定着ローラ６０と図示の矢印（Ｃ）方向に回転する加圧ローラ６１を備えている。記録媒体Ｐが図示されていない転写部で転写された未定着のトナー像を形成して、定着ローラ６０と加圧ローラ６１とのニップ部（Ｎ）に進入する。加圧手段６２で加圧ローラ６１を定着ローラ６０に押圧することによって、加熱加圧されて未定着のトナー像は、記録媒体Ｐに定着される。定着ローラ６０は、ヒータ６３を内蔵して、図示しないサーミスタ等によって温度コントロールされ、加圧ローラ６１は表面に護謨層が設けられている。
このように定着された記録媒体Ｐは、熱せられているためカールが発生している。カールが発生している記録媒体Ｐは、案内手段１の搬送ガイド板１１と対向ガイド板１２によって図示の矢印（Ａ）方向の搬送方向に確実に案内されて間隙部４を通過することにより、逆カール付けが行われて矯正される。
間隙部４は、案内手段１が図示の矢印（Ａ）方向の搬送経路内の搬送方向に案内して送り出す記録媒体Ｐの厚さ（ｔ）よりも広く、記録媒体Ｐの厚さ（ｔ）に加算する０．１ｍｍよりも狭い空間（Ｄ）を備えている。即ち、間隙部４の空間（Ｄ）は、（ｔ）＜（Ｄ）＜（ｔ＋０．１ｍｍ）となる。
更に、案内手段１は、進入する記録媒体Ｐを排紙する一対の排紙ローラ７を備えている。回転駆動手段５の駆動モータは、連動部材５０のタイミングベルトで図示の矢印（Ｅ）方向に回転するデカールローラ２と連動して一対の排紙ローラ７を図示の矢印（Ｆ）方向の排紙方向に回転駆動する。そして、回転駆動される一対の排紙ローラ７によって記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に案内して送り出す。
従って、構成が簡単で安価で記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。 The guide unit 1 includes a heat fixing unit 115 of the heating unit 6 that heats the recording medium P that enters. The thermal fixing unit 115 includes a fixing roller 60 that rotates in the illustrated arrow (B) direction and a pressure roller 61 that rotates in the illustrated arrow (C) direction. The recording medium P forms an unfixed toner image transferred at a transfer portion (not shown) and enters a nip portion (N) between the fixing roller 60 and the pressure roller 61. By pressing the pressure roller 61 against the fixing roller 60 by the pressure unit 62, the unfixed toner image that is heated and pressurized is fixed on the recording medium P. The fixing roller 60 includes a heater 63 and is temperature-controlled by a thermistor (not shown), and the pressure roller 61 has a protective layer on the surface.
Since the recording medium P thus fixed is heated, curling occurs. The recording medium P in which the curl is generated is reliably guided by the conveyance guide plate 11 and the opposite guide plate 12 of the guide means 1 in the conveyance direction indicated by the arrow (A) in the figure and passes through the gap portion 4. Reverse curling is performed and corrected.
The gap 4 is wider than the thickness (t) of the recording medium P that the guiding means 1 guides and sends in the conveying direction in the conveying path in the direction of the arrow (A) shown in the figure, and the thickness (t) of the recording medium P. A space (D) narrower than 0.1 mm is added. That is, the space (D) of the gap 4 is (t) <(D) <(t + 0.1 mm).
Further, the guiding means 1 includes a pair of paper discharge rollers 7 that discharge the recording medium P that enters. The drive motor of the rotation driving means 5 is linked with the decurling roller 2 that rotates in the direction of the arrow (E) shown in the figure by the timing belt of the interlocking member 50 and discharges the pair of paper discharge rollers 7 in the direction of the arrow (F) shown in the figure. Rotate in the direction. Then, the recording medium P is guided and sent out in the conveyance direction indicated by the arrow (A) in the figure by a pair of rotationally driven paper discharge rollers 7.
Therefore, it is possible to provide the recording medium transport apparatus 10 that is simple in structure and inexpensive and prevents the occurrence of damage to the recorded image and the defective transport of the recording medium P.

図３は、本発明の実施の形態にかかる記録媒体搬送装置１０における案内手段１のテフロン（登録商標）層１３の基本構成の斜視図である。
図３において、案内手段１の搬送ガイド板１１と対向ガイド板１２は、搬送経路内の記録媒体Ｐの当接部を覆うテフロン（登録商標）層１３を備えている。
従って、記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に搬送する際の搬送ガイド板１１と対向ガイド板１２は、記録媒体Ｐの当接部を覆うテフロン（登録商標）層１３により表面の潤滑性が良好となる。そして、記録媒体Ｐが再生紙などの表面性の比較的悪い記録用紙に対しても搬送性も確保できて、搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。
図４は、本発明の実施の形態にかかる記録媒体搬送装置１０におけるフィン１４とファン１５の基本構成の斜視図である。
図４において、記録媒体搬送装置１０の構成では、デカールローラ２の外周面に対向して案内手段１の搬送ガイド板１１に形成された湾曲面３が配置されている。そして、案内手段１の搬送ガイド板１１は、形成する湾曲面３の下側の下面に冷却用のフィン１４を備える。またそのフィン１４を冷却するファン１５を備え、案内手段１の全体を冷却する構成になっている。
即ち、記録媒体Ｐが通過するごとに搬送される記録媒体Ｐからの熱が案内手段１にこもることを防止する。
従って、トナー画像の温度が下がり切らないで定着されたトナーの剥がれを防止して記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。 FIG. 3 is a perspective view of the basic configuration of the Teflon (registered trademark) layer 13 of the guiding means 1 in the recording medium conveying apparatus 10 according to the embodiment of the present invention.
In FIG. 3, the transport guide plate 11 and the counter guide plate 12 of the guide unit 1 include a Teflon (registered trademark) layer 13 that covers the contact portion of the recording medium P in the transport path.
Accordingly, the transport guide plate 11 and the opposing guide plate 12 when the recording medium P is transported in the transport direction indicated by the arrow (A) in the drawing are surfaced by the Teflon (registered trademark) layer 13 that covers the contact portion of the recording medium P. Good lubricity. In addition, it is possible to provide the recording medium transport apparatus 10 that can secure transportability even when the recording medium P has a relatively poor surface property such as recycled paper, and prevents the occurrence of transport failure.
FIG. 4 is a perspective view of the basic configuration of the fins 14 and the fan 15 in the recording medium transport apparatus 10 according to the embodiment of the present invention.
In FIG. 4, in the configuration of the recording medium conveyance device 10, the curved surface 3 formed on the conveyance guide plate 11 of the guide means 1 is disposed so as to face the outer peripheral surface of the decurling roller 2. And the conveyance guide plate 11 of the guide means 1 is provided with the fin 14 for cooling in the lower surface of the lower side of the curved surface 3 to form. Further, the fan 15 for cooling the fins 14 is provided, and the entire guide means 1 is cooled.
That is, heat from the recording medium P conveyed every time the recording medium P passes is prevented from being trapped in the guide means 1.
Therefore, it is possible to provide the recording medium conveyance device 10 that prevents the toner fixed without the temperature of the toner image from dropping down and prevents the recording image from being damaged and the conveyance failure of the recording medium P.

図５は、本発明の実施の形態にかかる記録媒体搬送装置１０におけるデカールローラ２のテフロン（登録商標）層２０の基本構成の斜視図である。
図５において、デカールローラ２は、外周面をテフロン（登録商標）塗布で覆うテフロン（登録商標）層２０を備えている。記録媒体搬送装置１０の搬送側のデカールローラ２の外周面もテフロン（登録商標）層２０で覆うことにより、記録媒体Ｐに形成された画像面を搬送した場合において熱定着ユニット１１５（図１０参照）側からのトナーのオフセットを防止する。
従って、トナーのオフセットを防止して記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。 FIG. 5 is a perspective view of the basic configuration of the Teflon (registered trademark) layer 20 of the decurling roller 2 in the recording medium conveying apparatus 10 according to the embodiment of the present invention.
In FIG. 5, the decurling roller 2 includes a Teflon (registered trademark) layer 20 whose outer peripheral surface is covered with Teflon (registered trademark) coating. The outer peripheral surface of the decurling roller 2 on the conveyance side of the recording medium conveying apparatus 10 is also covered with a Teflon (registered trademark) layer 20, so that when the image surface formed on the recording medium P is conveyed, the heat fixing unit 115 (see FIG. 10). ) Prevents toner offset from the side.
Accordingly, it is possible to provide the recording medium conveyance device 10 that prevents the offset of the toner and prevents the occurrence of damage to the recorded image and the conveyance failure of the recording medium P.

図６は、本発明の実施の形態にかかる記録媒体搬送装置１０のデカール機能調整手段８の基本構成の斜視図である。
図６において、案内手段１の搬送ガイド板１１は、湾曲面３をデカールローラ２の外周面から離間して記録媒体Ｐのカールを修正するデカール機能の調整又はデカール機能を解除するデカール機能調整手段８を備えている。そのデカール機能調整手段８は、支点８０を中心にして図示の矢印（Ｇ）方向に回動可能に保持される回動ガイド板８１を備えている。そして、回動ガイド板８１は、回動駆動手段８２によって、手動又は自動的に支点８０を中心にして回動位置に回動駆動して保持することが出来る。
回動駆動手段８２は、回動ガイド板８１を回動位置に回動して保持するカム部材８３と、そのカム部材８３を図示の矢印（Ｈ）方向のデカール機能の調整又はデカール機能を解除する開放方向に回動駆動するソレノイド８４を備えている。
ソレノイド８４は、搬送される記録媒体Ｐが図示しないセンサー又は設定による制御部８５からのカール量の少ない厚紙などの記録媒体Ｐである情報により、回動ガイド板８１を回動位置に自動的に回動駆動する。
そして、デカール機能調整手段８は、湾曲面３をデカールローラ２から離間してデカールローラ２の加圧力を加減してカールのあまり発生していない記録媒体Ｐに対してデカール効果を付加することなく搬送させることが可能にする。
従って、よりカールの発生しない記録媒体Ｐに対して円滑な搬送を行って、記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。 FIG. 6 is a perspective view of the basic configuration of the decurling function adjusting means 8 of the recording medium conveying apparatus 10 according to the embodiment of the present invention.
In FIG. 6, the conveyance guide plate 11 of the guide means 1 is a decurling function adjusting means for adjusting the decurling function to correct the curl of the recording medium P by separating the curved surface 3 from the outer peripheral surface of the decurling roller 2 or canceling the decurling function. 8 is provided. The decurling function adjusting means 8 includes a rotation guide plate 81 that is held so as to be rotatable about the fulcrum 80 in the direction indicated by an arrow (G). Then, the rotation guide plate 81 can be rotated and driven to a rotation position around the fulcrum 80 by the rotation drive means 82 manually or automatically.
The rotation drive means 82 is a cam member 83 that rotates and holds the rotation guide plate 81 at the rotation position, and the cam member 83 is adjusted or released from the decurling function in the direction of the arrow (H). And a solenoid 84 that is driven to rotate in the opening direction.
The solenoid 84 automatically moves the rotation guide plate 81 to the rotation position based on information that the recording medium P to be conveyed is a recording medium P such as cardboard with a small curl amount from a sensor or setting control unit 85 (not shown). Rotating drive.
Then, the decurling function adjusting means 8 moves the curved surface 3 away from the decurling roller 2 to increase or decrease the pressure applied to the decurling roller 2 without adding a decurling effect to the recording medium P in which curling does not occur much. It can be transported.
Therefore, it is possible to provide the recording medium transport apparatus 10 that smoothly transports the recording medium P that is less curled and prevents the damage of the recorded image and the defective transport of the recording medium P.

図７は、本発明の実施の形態にかかる記録媒体搬送装置１０における摩擦部２１が護謨面２２の基本構成の斜視図である。
図８は、本発明の実施の形態にかかる記録媒体搬送装置１０における摩擦部２１が凹凸面２３の基本構成の斜視図である。
図７と図８において、デカールローラ２は、外周面の中間に記録媒体Ｐに当接して搬送する搬送性に優れた摩擦部２１を備えている。
大きな長いサイズの記録媒体Ｐの記録用紙は、熱定着ユニット１１５（図１０参照）から排紙ローラ７に挟まれれば自動的に搬送される。然し、図示しない小さな短いサイズの記録媒体Ｐの記録用紙の場合には、排紙ローラ７に到達しないと搬送ができないため記録用紙の仕様が限られてしまう。
そこで、摩擦部２１は、図７に図示するようにデカールローラ２の中間の中央付近に薄い護謨材を貼り付けた護謨面２２を備えて、図示のような小さな短いサイズの記録媒体Ｐの記録用紙の搬送も可能にしている。
又は、摩擦部２１は、図８に図示するようにデカールローラ２の中間の中央付近にサンドブラスト加工法等により凹凸面２３を形成して備えて、図示のような小さな短いサイズの記録媒体Ｐの記録用紙の搬送も可能にしている。
従って、小さな短いサイズの記録媒体Ｐが熱定着ユニット１１５から排紙ローラ７に到達しなくても搬送ができないため記録用紙の仕様が限られてしまうことがない。そして、記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。 FIG. 7 is a perspective view of the basic configuration of the protective surface 22 of the friction portion 21 in the recording medium transport apparatus 10 according to the embodiment of the present invention.
FIG. 8 is a perspective view of the basic configuration of the uneven surface 23 as the friction portion 21 in the recording medium transport apparatus 10 according to the embodiment of the present invention.
7 and 8, the decurling roller 2 is provided with a friction portion 21 having excellent transportability in contact with and transporting the recording medium P in the middle of the outer peripheral surface.
A recording sheet of a large long size recording medium P is automatically conveyed when it is sandwiched between the paper discharge roller 7 from the thermal fixing unit 115 (see FIG. 10). However, in the case of a recording sheet of a small short-sized recording medium P (not shown), since the sheet cannot be conveyed unless it reaches the discharge roller 7, the specification of the recording sheet is limited.
Accordingly, the frictional portion 21 includes a protective surface 22 with a thin protective material pasted near the middle center of the decal roller 2 as shown in FIG. Paper transport is also possible.
Alternatively, as shown in FIG. 8, the friction portion 21 is provided with a concave and convex surface 23 formed by a sandblasting method or the like near the middle center of the decurling roller 2, and a small short size recording medium P as shown in the figure. The recording paper can also be conveyed.
Therefore, since the small short-sized recording medium P cannot be transported without reaching the paper discharge roller 7 from the thermal fixing unit 115, the specification of the recording paper is not limited. In addition, it is possible to provide the recording medium transport apparatus 10 that prevents the recording image from being damaged and the transport failure of the recording medium P from occurring.

図９は、本発明の実施の形態にかかる記録媒体搬送装置１０におけるデカールローラ２の中空部２４の基本構成の斜視図である。
図９において、デカールローラ２は、中空材で中空部２４を備えることによりデカールローラ２自身の熱の拡散も早くなり、熱定着ユニット１１５からのホットオフセットに対しても有利となり、トナーオフセットを防ぐことが出来る。
従って、デカールローラ２による、トナーオフセットを防止して、記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を提供することが出来る。
図１０は、本発明の実施の形態にかかる記録媒体搬送装置１０を備える画像形成装置１００の基本構成図である。
図１０において、記録媒体に記録画像を形成する画像形成装置１００は、搬送される記録媒体Ｐに記録画像を形成する画像形成ユニット１０１備えている。更に、画像形成ユニット１０１で記録画像を形成した記録媒体Ｐを図示の矢印（Ａ）方向の搬送方向に案内して搬送する本発明に記載した記録媒体搬送装置１０も備えている。
画像形成装置１００の側部には、記録画像を形成した後の記録媒体Ｐの後処理を行う記録媒体後処理装置２００を取り付けている。
画像形成ユニット１０１の上部には、原稿画像読み取りユニット１０２が載置されている。そして、画像形成ユニット１０１は、記録媒体Ｐを給送する記録媒体給送装置１０３の上部に保持されている。
画像形成ユニット１０１は、電子写真方式の作像プロセスで利便性や汎用性に優れ高速で高品質のトナーの記録画像を記録媒体Ｐの記録用紙等に転写して形成するようになっている。 FIG. 9 is a perspective view of the basic configuration of the hollow portion 24 of the decurling roller 2 in the recording medium conveying apparatus 10 according to the embodiment of the present invention.
In FIG. 9, the decurling roller 2 is a hollow material and has a hollow portion 24, so that the heat of the decurling roller 2 itself is quickly diffused, which is advantageous for hot offset from the heat fixing unit 115 and prevents toner offset. I can do it.
Therefore, it is possible to provide the recording medium conveyance device 10 that prevents toner offset by the decurling roller 2 and prevents the occurrence of damage to the recorded image and the conveyance failure of the recording medium P.
FIG. 10 is a basic configuration diagram of an image forming apparatus 100 including the recording medium transport apparatus 10 according to the embodiment of the present invention.
In FIG. 10, an image forming apparatus 100 that forms a recorded image on a recording medium includes an image forming unit 101 that forms a recorded image on a conveyed recording medium P. Furthermore, the recording medium conveying apparatus 10 according to the present invention is also provided that guides and conveys the recording medium P on which the recording image is formed by the image forming unit 101 in the illustrated arrow (A) direction.
A recording medium post-processing device 200 that performs post-processing of the recording medium P after forming a recording image is attached to a side portion of the image forming apparatus 100.
A document image reading unit 102 is placed on the image forming unit 101. The image forming unit 101 is held on an upper portion of a recording medium feeding device 103 that feeds the recording medium P.
The image forming unit 101 is formed by transferring a high-quality, high-quality toner recording image onto a recording sheet of a recording medium P, which is excellent in convenience and versatility in an electrophotographic image forming process.

原稿画像読み取りユニット１０２の原稿台１２０に載置された原稿Oを光源１２１が図示の矢印（Ｊ）方向に移動し、このとき、原稿Oの原稿画像面が光源１２１により照明され、原稿画像が読み取り光学系１２２で読み取られる。読み取り光学系１２２で読み取られる原稿画像は、画像形成ユニット１０１の書き込みユニット１１２によってドラム形状の感光体ドラム１１０上に書き込まれる。
感光体ドラム１１０は、図示の矢印（Ｋ）方向の時計方向に回転し、この時、帯電装置１１１によって表面を一様に帯電され、その帯電面に書き込みユニット１１２により原稿画像が書き込まれる。これによって感光体ドラム１１０上に静電潜像が形成され、この潜像は現像ユニット１１３によってトナー像として可視像化される。
一方、記録媒体給送装置１０３から記録媒体Ｐが感光体ドラム１１０に向けて搬送され、転写装置１１４によって感光体ドラム１１０上のトナーの記録画像が記録媒体Ｐに転写される。
この記録媒体Ｐは、熱定着ユニット１１５を通り、転写されたトナーの記録画像が記録媒体Ｐ上に熱定着される。熱定着ユニット１１５の通過で記録媒体Ｐにカールが発生する場合もある。そして、記録媒体Ｐは本実施の形態の記録媒体搬送装置１０によりカールを矯正して図示の矢印（Ａ）方向の搬送方向に案内して搬送して画像形成装置１００の外に送り出されて収納される。又は、図示のように記録媒体後処理装置２００に搬入されてパンチ穴の穿孔処理や製本処理等の所定の後処理と搬送が行われて送り出されて収納される。
記録媒体搬送装置１０により、画像形成装置１００から外に送り出され図示しない排紙トレイ又は記録媒体後処理装置２００の処理ユニットに記録媒体Ｐが途中の搬送ガイド等にひっかかるジャムの発生を防止する。また、ジャムにならなくても最終的に排出された時に記録媒体Ｐの耳折れ等の記録媒体Ｐがスタックされる搬送不良の発生も防止することが出来る。
感光体ドラム１１０上に残留するトナーは、クリーニングユニット１１６によって除去されて次工程に備えられる。
従って、記録媒体Ｐのカールを矯正する構成が簡単で安価で記録画像の損傷や記録媒体Ｐの搬送不良の発生を防止する記録媒体搬送装置１０を備える画像形成装置１００も提供することが出来る。 The light source 121 moves the document O placed on the document table 120 of the document image reading unit 102 in the direction of the arrow (J) shown in the figure. At this time, the document image surface of the document O is illuminated by the light source 121 and the document image is Reading is performed by the reading optical system 122. A document image read by the reading optical system 122 is written on the drum-shaped photosensitive drum 110 by the writing unit 112 of the image forming unit 101.
The photosensitive drum 110 rotates clockwise in the direction of the arrow (K) shown in the figure. At this time, the surface is uniformly charged by the charging device 111, and a document image is written on the charged surface by the writing unit 112. As a result, an electrostatic latent image is formed on the photosensitive drum 110, and this latent image is visualized as a toner image by the developing unit 113.
On the other hand, the recording medium P is conveyed from the recording medium feeding device 103 toward the photosensitive drum 110, and the recorded image of the toner on the photosensitive drum 110 is transferred to the recording medium P by the transfer device 114.
The recording medium P passes through the thermal fixing unit 115, and the recorded image of the transferred toner is thermally fixed on the recording medium P. In some cases, the recording medium P may be curled by passing through the heat fixing unit 115. Then, the recording medium P is curled by the recording medium conveying apparatus 10 of the present embodiment, guided in the conveying direction indicated by the arrow (A) in the figure, conveyed, and sent out of the image forming apparatus 100 for storage. Is done. Alternatively, as shown in the drawing, the sheet is carried into the recording medium post-processing apparatus 200, and is subjected to predetermined post-processing and conveyance such as punching processing and bookbinding processing, and is sent out and stored.
The recording medium conveyance device 10 prevents the occurrence of a jam in which the recording medium P is sent to the outside from the image forming apparatus 100 and is caught by a conveyance guide or the like in the middle of a paper discharge tray or a processing unit of the recording medium post-processing device 200 (not shown). Further, it is possible to prevent the occurrence of a conveyance failure in which the recording medium P is stacked, such as the folding of the recording medium P when it is finally discharged without jamming.
The toner remaining on the photosensitive drum 110 is removed by the cleaning unit 116 and prepared for the next process.
Therefore, it is possible to provide the image forming apparatus 100 including the recording medium conveyance device 10 that has a simple and inexpensive configuration for correcting the curl of the recording medium P and prevents damage to the recorded image and occurrence of conveyance failure of the recording medium P.

本発明の実施の形態にかかる記録媒体搬送装置の基本構成図である。1 is a basic configuration diagram of a recording medium conveyance device according to an embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置の間隙部の基本構成の拡大図である。FIG. 3 is an enlarged view of a basic configuration of a gap portion of the recording medium conveyance device according to the embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置における案内手段のテフロン（登録商標）層の基本構成の斜視図である。It is a perspective view of the basic composition of the Teflon (trademark) layer of the guide means in the recording-medium conveying apparatus concerning embodiment of this invention. 本発明の実施の形態にかかる記録媒体搬送装置におけるフィンとファンの基本構成の斜視図である。FIG. 3 is a perspective view of a basic configuration of fins and a fan in the recording medium carrying device according to the embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置におけるデカールローラのテフロン（登録商標）層の基本構成の斜視図である。FIG. 3 is a perspective view of a basic configuration of a Teflon (registered trademark) layer of a decurling roller in a recording medium conveying apparatus according to an embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置のデカール機能調整手段の基本構成の斜視図である。FIG. 3 is a perspective view of a basic configuration of a decurling function adjusting unit of the recording medium conveyance device according to the embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置における摩擦部が護謨面の基本構成の斜視図である。FIG. 3 is a perspective view of a basic configuration of a protective surface of the friction portion in the recording medium transport apparatus according to the embodiment of the present invention. 本発明の実施の形態にかかる記録媒体搬送装置における摩擦部が凹凸面の基本構成の斜視図である。FIG. 3 is a perspective view of a basic configuration in which a friction portion in the recording medium conveyance device according to the embodiment of the present invention has an uneven surface. 本発明の実施の形態にかかる記録媒体搬送装置におけるデカールローラの中空部の基本構成の斜視図である。It is a perspective view of the basic composition of the hollow part of a decurling roller in the recording medium conveyance apparatus concerning an embodiment of the invention. 本発明の実施の形態にかかる記録媒体搬送装置を備える画像形成装置の基本構成図である。1 is a basic configuration diagram of an image forming apparatus including a recording medium conveyance device according to an embodiment of the present invention.

Explanation of symbols

１案内手段、２デカールローラ、３湾曲面、４間隙部、５回転駆動手段、６加熱手段、７排紙ローラ、８デカール機能調整手段、１０記録媒体搬送装置、１１搬送ガイド板、１２対向ガイド板、１３テフロン（登録商標）層、１４フィン、１５ファン、２０テフロン（登録商標）層、２１摩擦部、２２護謨面、２３凹凸面、２４中空部、５０連動部材、６０定着ローラ、６１加圧ローラ、６２加圧手段、６３ヒータ、８０支点、８１回動ガイド板、８２回動駆動手段、８３カム部材、８４ソレノイド、８５制御部、１００画像形成装置、１０１画像形成ユニット、１０２原稿画像読み取りユニット、１０３記録媒体給送装置、１１０感光体ドラム、１１１帯電装置、１１２書き込みユニット、１１３現像ユニット、１１４転写装置、１１５熱定着ユニット、１１６クリーニングユニット、１２０原稿台、１２１光源、１２２読み取り光学系、２００記録媒体後処理装置 DESCRIPTION OF SYMBOLS 1 Guide means, 2 Decal roller, 3 Curved surface, 4 Gap part, 5 Rotation drive means, 6 Heating means, 7 Paper discharge roller, 8 Decal function adjustment means, 10 Recording medium conveyance apparatus, 11 Conveyance guide plate, 12 Opposite guide Plate, 13 Teflon (registered trademark) layer, 14 fins, 15 fan, 20 Teflon (registered trademark) layer, 21 friction part, 22 protective surface, 23 uneven surface, 24 hollow part, 50 interlocking member, 60 fixing roller, 61 heating Pressure roller, 62 Pressure means, 63 Heater, 80 fulcrum, 81 Rotation guide plate, 82 Rotation drive means, 83 Cam member, 84 Solenoid, 85 Control unit, 100 Image forming apparatus, 101 Image forming unit, 102 Original image Reading unit, 103 recording medium feeding device, 110 photosensitive drum, 111 charging device, 112 writing unit , 113 developing unit, 114 transfer device, 115 thermal fixing unit, 116 cleaning unit, 120 document table, 121 light source, 122 reading optical system, 200 recording medium post-processing device

Claims

In a recording medium conveying apparatus for conveying a recording medium,
Formed on the guide means for feeding the recording medium that enters into the conveyance path, a cylindrical decurling roller for correcting curling of the recording medium on the guiding means, and the guide means facing the outer peripheral surface of the decurling roller The curved surface having a larger curvature than the outer circumferential surface of the decurling roller, a gap formed by the curved surface and the outer circumferential surface of the decurling roller, and the decurling roller for feeding the recording medium in the gap in the conveying direction And a rotation driving means for rotating the recording medium.

2. The recording medium transport apparatus according to claim 1, wherein the guide means includes a transport guide plate that guides the recording medium in the transport direction, and an opposing guide plate that opposes the transport guide plate and guides the recording medium in the transport direction. And a recording medium conveying apparatus.

3. The recording medium transport apparatus according to claim 1, wherein the guide unit includes a Teflon layer that covers a contact portion with the recording medium in the transport path.

4. The recording medium conveying apparatus according to claim 1, wherein the guide means includes a cooling fin.

5. The recording medium conveying apparatus according to claim 1, further comprising a fan that cools the guide unit.

6. The recording medium transport apparatus according to claim 1, wherein the guide unit includes a heating unit that heats the recording medium that enters the recording medium transport apparatus.

7. The recording medium conveying apparatus according to claim 6, wherein the heating unit includes a thermal fixing unit that thermally fixes a toner image formed on the recording medium.

8. The recording medium conveyance apparatus according to claim 1, wherein the guide unit includes a discharge roller that discharges an entering recording medium.

9. The recording medium conveying apparatus according to claim 1, wherein the guide unit adjusts a decurling function for correcting curling of the recording medium by separating the curved surface from an outer peripheral surface of the decurling roller. A recording medium conveying apparatus comprising a decurling function adjusting unit for canceling a decurling function.

10. The recording medium conveying apparatus according to claim 9, wherein the decurling function adjusting means includes a rotation guide plate that is rotatably held around a fulcrum.

11. The recording medium conveyance apparatus according to claim 10, wherein the rotation guide plate includes a rotation drive unit that rotates to a rotation position about a fulcrum.

12. The recording medium conveying apparatus according to claim 11, wherein the rotation driving means includes a cam member that rotates and holds the rotation guide plate at a rotation position, and a solenoid that rotates the cam member. A recording medium conveying apparatus comprising:

13. The recording medium conveyance apparatus according to claim 1, wherein the decurling roller includes a Teflon layer that covers an outer peripheral surface.

14. The recording medium conveying apparatus according to claim 1, wherein the decurling roller includes a friction portion that abuts against and conveys the recording medium in the middle of the outer peripheral surface. .

15. The recording medium transport apparatus according to claim 14, wherein the friction portion includes a protective surface.

15. The recording medium conveying apparatus according to claim 14, wherein the friction member has an uneven surface.

17. The recording medium conveying apparatus according to claim 1, wherein the decurling roller includes a cooling hollow portion.

18. The recording medium conveyance device according to claim 1, wherein the gap portion is wider than a thickness of the recording medium that the guide unit guides and sends in the conveyance direction in the conveyance path. A recording medium conveying apparatus comprising a space narrower than 0.1 mm added to the thickness.

19. The recording medium conveyance device according to claim 1, wherein the rotation driving unit includes an interlocking member that rotationally drives the discharge roller that sends the recording medium in a conveyance direction in conjunction with the decurling roller. A recording medium conveying apparatus comprising:

An image forming apparatus for forming an image on a recording medium, comprising the recording medium conveying apparatus according to any one of claims 1 to 19, wherein the recording medium is conveyed in a conveying direction.