JP2008254219A - Conveyance device for medium to be recorded, recorder equipped with this device, and liquid jet apparatus - Google Patents

Conveyance device for medium to be recorded, recorder equipped with this device, and liquid jet apparatus Download PDF

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JP2008254219A
JP2008254219A JP2007095652A JP2007095652A JP2008254219A JP 2008254219 A JP2008254219 A JP 2008254219A JP 2007095652 A JP2007095652 A JP 2007095652A JP 2007095652 A JP2007095652 A JP 2007095652A JP 2008254219 A JP2008254219 A JP 2008254219A
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recording medium
medium
roller
recording
load applying
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Kazuhiko Tsuyama
和彦 津山
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Seiko Epson Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance device for a medium to be recorded which can suppress the occurrence of skewing of the medium when a leading end of the medium reaches discharge driving rollers, and which can reduce the risk of formation of a boundary in a recording image or the occurrence of distortion in recording. <P>SOLUTION: The conveyance device is equipped with both a discharge roller which has a plurality of the discharge driving rollers and coupled-driving discharge rollers, and a medium-side guide means which regulates a conveyance route of the medium to be positioned symmetrically with regards to a breadthwise center line of the medium. A load applying means is installed at a position at the upstream of the discharge roller and in agree with the breadthwise center line of the conveyed medium. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、被記録材をその幅方向におけるセンター位置を基準にして搬送する構成の被記録媒体搬送装置およびこれを備える記録装置に関するものでる。更に本発明は、インク等の液体をそのヘッドから吐出（噴射）して被記録媒体（被液体噴射媒体）に記録を実行する（液体を付着する）インクジェット式記録装置などの液体噴射装置及び該液体噴射装置に対して設けられる被液体噴射媒体搬送装置に関するものである。   The present invention relates to a recording medium conveying apparatus configured to convey a recording material with reference to a center position in the width direction, and a recording apparatus including the recording medium conveying apparatus. Furthermore, the present invention relates to a liquid ejecting apparatus such as an ink jet recording apparatus that performs recording (attaches liquid) on a recording medium (liquid ejecting medium) by ejecting (ejecting) a liquid such as ink from the head, and the like. The present invention relates to a liquid ejecting medium conveying apparatus provided for a liquid ejecting apparatus.

ここで液体噴射装置とは、インクジェット式記録ヘッドが用いられ、該記録ヘッドからインクを吐出して被記録媒体に記録を行うプリンタ、複写機およびファクシミリ等の記録装置に限らず、インクに代えてその用途に対応する液体を前記記録ヘッドに相当する液体噴射ヘッドから被記録媒体に相当する被噴射媒体に噴射して、前記液体を前記被噴射媒体に付着させる装置を含む意味で用いる。   Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that records ink on a recording medium by discharging ink from the recording head. It includes a device that ejects a liquid corresponding to the application from a liquid ejecting head corresponding to the recording head to an ejected medium corresponding to a recording medium and adheres the liquid to the ejected medium.

液体噴射ヘッドとして、前記記録ヘッドの他に、液晶ディスプレー等のカラーフィルター製造に用いられる色材噴射ヘッド、有機ＥＬディスプレーや面発光ディスプレー（ＦＥＤ）等の電極形成に用いられる電極材（導電ペースト）噴射ヘッド、バイオチップ製造に用いられる生体有機物噴射ヘッド、精密ピペットとしての試料噴射ヘッド等が挙げられる。   In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

被記録媒体を給送装置から被記録媒体送りローラ、そして排出ローラ側へ搬送する際に、被記録材をその幅方向におけるセンター位置を基準にして搬送する構成の被記録媒体搬送装置は以下のように構成されている。すなわち、排出ローラを構成する複数の排出駆動ローラと排出従動ローラとが被記録媒体の幅方向の中心線に関して対称的に位置するように被記録媒体の搬送経路が一対のサイドガイドによって規定されると共に、当該排出ローラと前記被記録媒体送りローラとの両軸が平行に設けられている。   When the recording medium is conveyed from the feeding device to the recording medium feeding roller and the discharge roller side, the recording medium conveying device configured to convey the recording material based on the center position in the width direction is as follows. It is configured as follows. In other words, the conveyance path of the recording medium is defined by the pair of side guides so that the plurality of ejection driving rollers and the ejection driven roller constituting the ejection roller are positioned symmetrically with respect to the center line in the width direction of the recording medium. In addition, both axes of the discharge roller and the recording medium feed roller are provided in parallel.

ここで、当該排出ローラと前記被記録媒体送りローラとが完全に平行に設けられていれば、理論上は被記録媒体はスキューせずにまっすぐに進行し、その前端辺が全長にわたってほぼ同時に前記排出ローラに到達してニップされてそのまま真っ直ぐに搬送される。従って、スキューに基づく記録品質の低下は無いと言える。   Here, if the discharge roller and the recording medium feed roller are provided completely in parallel, the recording medium theoretically advances straight without skewing, and the front end of the recording medium is almost simultaneously over the entire length. It reaches the discharge roller, is nipped and is conveyed straight as it is. Therefore, it can be said that there is no deterioration in recording quality due to skew.

また従来は、製造上の理由により記録ヘッドのノズル密度は比較的低く、ノズル間の間隔が比較的長かったため、ノズル間の間隔の存在による記録の空白部分をなくすために、被記録媒体を記録ヘッドに対して搬送方向である副走査方向に少しずつずらしながら同じ領域（ラスタ）に対して例えば４回のスキャン動作、すなわち４パス動作を行っていた。このような従来技術は例えば特許文献１や特許文献２に開示されている。
特開平９−１６９１０９号公報 特開２００２−１０３５８０号公報 Conventionally, the nozzle density of the recording head is relatively low for manufacturing reasons, and the interval between the nozzles is relatively long, so that the recording medium is recorded in order to eliminate the blank portion of the recording due to the presence of the interval between the nozzles For example, four scanning operations, that is, four-pass operations, are performed on the same region (raster) while being gradually shifted with respect to the head in the sub-scanning direction that is the transport direction. Such conventional techniques are disclosed in, for example, Patent Document 1 and Patent Document 2.
JP 9-169109 A JP 2002-103580 A

図７に基づいて、本発明の課題を説明する。
製造誤差等の理由から排出ローラ１００と被記録媒体送りローラとを完全な平行状態とすることは現実的には困難であり、そのため実際には排出ローラ１００と被記録媒体送りローラとは極僅かではあるが傾いた関係にあり、被記録媒体Ｐの搬送時に該被記録媒体Ｐの前端の左右いずれか一方が先に排出駆動ローラ１００に到達してしまう。その結果、排出駆動ローラ１００に先に到達した側の被記録媒体Ｐの前端部分は、到達していない側のフリー状態の前端部分では受けない負荷を受けることになり、その負荷に因って送りが遅れがちとなり、一方遅れて排出駆動ローラ１００に到達する側の前記フリー状態の前端部分は送りが進む傾向となる。 The problem of the present invention will be described based on FIG.
It is practically difficult to make the discharge roller 100 and the recording medium feed roller in a completely parallel state due to a manufacturing error or the like. Therefore, in actuality, the discharge roller 100 and the recording medium feed roller are extremely small. However, since the recording medium P is transported, either the left or right of the front end of the recording medium P reaches the discharge driving roller 100 first. As a result, the front end portion of the recording medium P that has reached the discharge drive roller 100 first receives a load that is not received by the free front end portion that has not reached the recording medium P. The feed tends to be delayed, while the forward end portion of the free state on the side that reaches the discharge drive roller 100 with a delay tends to advance.

すなわち図７において、排出駆動ローラ１００に先に到達する被記録媒体Ｐの進行方向左側前端では、矢印Ｆで示すような負荷が掛かり、被記録媒体Ｐの中央では矢印Ａで示すモーメントが、また被記録媒体Ｐの進行方向右端では矢印Ｂで示すモーメントが作用する。この結果、被記録媒体Ｐには矢印Ｒで示す回転力を生じるため、被記録媒体Ｐがスキューしたり、或いは撓む原因となる。これにより記録ヘッド直下の被記録媒体の位置が僅かにずれるため、そのずれ以前の被記録媒体に実行された記録画像に対して、そのずれ以後の記録画像との間で画像上の境界ができる虞、或いは記録に歪みを生じる虞があった。   That is, in FIG. 7, a load as indicated by an arrow F is applied at the front left end of the recording medium P that reaches the discharge driving roller 100 first, and a moment indicated by an arrow A is applied at the center of the recording medium P. At the right end of the recording medium P in the traveling direction, a moment indicated by an arrow B acts. As a result, a rotational force indicated by an arrow R is generated in the recording medium P, which causes the recording medium P to skew or bend. As a result, the position of the recording medium immediately below the recording head slightly shifts, so that a boundary on the image is formed between the recording image executed on the recording medium before the shift and the recording image after the shift. There is a possibility that the recording may be distorted.

また、近年の技術進歩により記録ヘッドにおけるノズル密度が高くなってきており、４パス動作の必要がなくなり、スループット向上のため２パスあるいは１パス動作で記録を行う方向で記録装置の開発が検討されている。２パスあるいは１パス動作が実現された場合には、上述の理由による記録の歪みや画像上の境界は４パス動作の場合に比べてより目立つようになるため、記録品質が落ちる原因となる。   Further, due to recent technological advances, the nozzle density in the recording head has increased, and the need for a 4-pass operation has been eliminated, and the development of a recording apparatus in the direction of recording in a 2-pass or 1-pass operation has been studied to improve throughput. ing. When the 2-pass or 1-pass operation is realized, the recording distortion and the boundary on the image due to the above-mentioned reason become more conspicuous than the case of the 4-pass operation, which causes the recording quality to deteriorate.

本発明は、上記事情に鑑みてなされたものであって、被記録媒体の前端が排出駆動ローラに到達する際に、該被記録媒体のスキューの発生を抑制することができる被記録媒体搬送装置およびこれを備える記録装置、液体噴射装置を提供することを課題とするものである。   The present invention has been made in view of the above circumstances, and a recording medium transport apparatus capable of suppressing the occurrence of skew of the recording medium when the front end of the recording medium reaches the discharge driving roller. It is another object of the present invention to provide a recording apparatus and a liquid ejecting apparatus including the same.

上記課題を達成するため、本発明の第１の態様に係る被記録媒体搬送装置は、複数の排出駆動ローラと排出従動ローラとを備える排出ローラと、被記録媒体の幅方向の中心線に関して対称的に位置するように前記被記録媒体の搬送経路を規定する被記録媒体サイドガイド手段とを備え、前記排出ローラの上流であって搬送される前記被記録媒体の幅方向中心線に一致する位置に負荷付与手段が設けられていることを特徴とするものである。   In order to achieve the above object, a recording medium transporting apparatus according to a first aspect of the present invention is symmetrical with respect to a discharging roller having a plurality of discharging driving rollers and discharging driven rollers, and a center line in the width direction of the recording medium. And a recording medium side guide means for defining a conveyance path of the recording medium so as to be positioned at the same position, which is upstream of the discharge roller and coincides with the center line in the width direction of the recording medium to be conveyed Is provided with load applying means.

本発明の第１の態様によれば、被記録媒体の前端の中心が先ず負荷付与手段に到達し、その後に被記録媒体は、負荷付与手段による負荷を受けながら被記録媒体の左右いずれかの前端が排出駆動ローラに到達する。このとき被記録媒体の中央には負荷付与手段が既に接触しているので、その部分でグリップ力が作用し、排出駆動ローラに先行して到達した側の送りが遅れがちとなり、一方後から到達する側の送りが進む傾向となる問題が抑制される。
従って、被記録媒体の先端が排出駆動ローラに到達する際に、該被記録媒体のスキューの発生を抑制することができ、記録画像に境界ができたり、或いは記録に歪みを生じる虞を低減することができる。 According to the first aspect of the present invention, the center of the front end of the recording medium first reaches the load applying unit, and then the recording medium receives either the left or right of the recording medium while receiving the load from the load applying unit. The front end reaches the discharge drive roller. At this time, since the load applying means is already in contact with the center of the recording medium, the grip force acts on that portion, and the feed on the side that has reached before the discharge driving roller tends to be delayed, while it reaches later. Problems that tend to advance the feeding on the side to be performed are suppressed.
Therefore, when the leading edge of the recording medium reaches the discharge driving roller, the occurrence of skew of the recording medium can be suppressed, and the possibility that a boundary is formed in the recorded image or the recording is distorted is reduced. be able to.

また、本発明の第２の態様に係る被記録媒体搬送装置は、上記第１の態様において、前記負荷付与手段は前記被記録媒体の搬送経路の上側に設けられる従動回転自在な負荷付与歯付きローラであり、該負荷付与歯付きローラの下端側は、被記録媒体の搬送経路の一部を横切るように配置されていることを特徴とするものである。   According to a second aspect of the present invention, there is provided the recording medium transport device according to the first aspect, wherein the load applying means is provided with a follow-up rotatable load applying tooth provided above the transport path of the recording medium. It is a roller, and the lower end side of the roller with load applying teeth is arranged so as to cross a part of the conveyance path of the recording medium.

本態様によれば、被記録媒体の前端の中心が負荷付与歯付きローラに到達した後、被記録媒体は負荷付与歯付きローラの下側を通過する。被記録媒体の左右いずれかの前端が排出駆動ローラに到達するとき、負荷付与歯付きローラが被記録媒体の表面に接触して刃先が僅かに突き刺さっているため、被記録媒体のグリップ力が確実に生じ、被記録媒体のスキューを抑制することができる。尚、刃先は微少であるため、前記の如く突き刺さっても記録画像には影響しない。   According to this aspect, after the center of the front end of the recording medium reaches the load applying toothed roller, the recording medium passes under the load applying toothed roller. When either the left or right front end of the recording medium reaches the ejection drive roller, the load-applying toothed roller contacts the surface of the recording medium and the blade edge is slightly stuck, so that the grip force of the recording medium is ensured. And skew of the recording medium can be suppressed. Since the cutting edge is very small, even if it is pierced as described above, the recorded image is not affected.

また、本発明の第３の態様に係る被記録媒体搬送装置は、上記第１の態様において、前記負荷付与手段は前記被記録媒体の搬送経路の下側に設けられる負荷付与リブであり、該負荷付与リブの頂部は被記録媒体の搬送経路の一部を横切るように配置されていることを特徴とするものである。   Further, in the recording medium transport apparatus according to a third aspect of the present invention, in the first aspect, the load applying means is a load applying rib provided below a transport path of the recording medium, The top part of the load applying rib is arranged so as to cross a part of the conveyance path of the recording medium.

本態様によれば、被記録媒体の前端の中心が負荷付与リブに衝突した後、被記録媒体は負荷付与リブの頂部に下から支持された接触状態でその上側を通過する。被記録媒体の左右いずれかの前端が排出駆動ローラに到達するとき、負荷付与リブが被記録媒体の下面に摩擦接触しているため、被記録媒体のグリップ力が確実に生じ、被記録媒体のスキューを抑制することができる。   According to this aspect, after the center of the front end of the recording medium collides with the load applying rib, the recording medium passes through the upper side in a contact state supported from below on the top of the load applying rib. When either the left or right front end of the recording medium reaches the discharge drive roller, the load applying rib is in frictional contact with the lower surface of the recording medium, so that the grip force of the recording medium is reliably generated, and the recording medium Skew can be suppressed.

また、本発明の第４の態様に係る被記録媒体搬送装置は、上記第１から第３のいずれか１つの態様において、前記被記録媒体を前記負荷付与手段に案内するガイドが前記負荷付与装置の上流側に設けられていることを特徴とするものである。
本態様によれば、被記録媒体の前端が確実に負荷付与手段の位置に到達するように案内することができる。 According to a fourth aspect of the present invention, there is provided the recording medium transport apparatus according to any one of the first to third aspects, wherein the guide for guiding the recording medium to the load applying unit is the load applying apparatus. It is provided in the upstream of this.
According to this aspect, it is possible to guide the front end of the recording medium so as to reliably reach the position of the load applying unit.

また、本発明の第５の態様に係る記録装置は、被記録媒体搬送装置と、該被記録媒体搬送装置によって搬送される被記録媒体に記録を実行する記録実行部とを備えた記録装置であって、前記被記録媒体搬送装置は、第１から第４のいずれか１つの態様の被記録媒体搬送装置であることを特徴とするものである。
本態様によれば、被記録媒体のスキューが抑制できるから、２パスあるいは１パス動作で記録を行う場合にも、記録の歪みや画像上の境界を生じるなどの記録品質の低下を防止することができる。 A recording apparatus according to a fifth aspect of the present invention is a recording apparatus including a recording medium transport device and a recording execution unit that executes recording on the recording medium transported by the recording medium transport device. In addition, the recording medium conveyance device is a recording medium conveyance device according to any one of the first to fourth aspects.
According to this aspect, since the skew of the recording medium can be suppressed, even when recording is performed by two-pass or one-pass operation, it is possible to prevent recording quality deterioration such as recording distortion and image boundary. Can do.

また、本発明の第６の態様に係る液体噴射装置は、被液体噴射媒体搬送装置と、該被液体噴射媒体搬送装置によって搬送される被液体噴射媒体に液体噴射を実行する液体噴射実行部とを備えた液体噴射装置であって、前記被液体噴射媒体搬送装置は、複数の排出駆動ローラと排出従動ローラとを備える排出ローラと、被液体噴射媒体の幅方向の中心線に関して対称的に位置するように前記被液体噴射媒体の搬送経路を規定する被液体噴射媒体サイドガイド手段とを備え、前記排出ローラの上流であって搬送される前記被液体噴射媒体の幅方向中心線に一致する位置に負荷付与手段が設けられていることを特徴とするものである。   The liquid ejecting apparatus according to the sixth aspect of the present invention includes a liquid ejecting medium transport device, and a liquid ejecting execution unit that performs liquid ejecting on the liquid ejecting medium transported by the liquid ejecting medium transport device. The liquid ejecting medium conveying apparatus includes a discharge roller including a plurality of discharge driving rollers and a discharge driven roller, and a symmetrical position with respect to a center line in the width direction of the liquid ejecting medium. And a liquid jet medium side guide means that defines a transport path of the liquid jet medium, and a position that is upstream of the discharge roller and coincides with the center line in the width direction of the liquid jet medium to be transported Is provided with load applying means.

以下、本願発明の実施の形態を図面に基づいて説明する。図１は本発明に係る実施例の被記録媒体搬送装置を適用したインクジェットプリンタの側断面図であり、図２は被記録媒体搬送装置周辺を示す平面図であり、図３は被記録媒体搬送装置を示す側断面図であり、図４は本発明の作用を説明するための模式図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of an ink jet printer to which a recording medium conveying apparatus according to an embodiment of the present invention is applied. FIG. 2 is a plan view showing the periphery of the recording medium conveying apparatus. FIG. 4 is a side sectional view showing the apparatus, and FIG. 4 is a schematic view for explaining the operation of the present invention.

図１に示すインクジェット式記録装置１（以下、単に記録装置という）は、記録装置本体３の後方に給送装置５を備えている。給送装置５は、被記録媒体Ｐの幅寸法に応じて幅方向に同じ距離だけ移動できる左右一対のサイドガイドを有する被記録媒体サイドガイド手段６を備えている。従って、該サイドガイド手段６の前記一対のサイドガイド間に被記録媒体Ｐの両側辺がガイドされているとき、該被記録媒体Ｐの大きさに係わらず当該被記録媒体Ｐの幅方向での中心線Ｌの位置は同じである。   An ink jet recording apparatus 1 shown in FIG. 1 (hereinafter simply referred to as a recording apparatus) includes a feeding device 5 behind the recording apparatus main body 3. The feeding device 5 includes recording medium side guide means 6 having a pair of left and right side guides that can move by the same distance in the width direction according to the width dimension of the recording medium P. Therefore, when both sides of the recording medium P are guided between the pair of side guides of the side guide means 6, the width of the recording medium P in the width direction is increased regardless of the size of the recording medium P. The position of the center line L is the same.

給送装置５に積載される被記録媒体Ｐは、給送ローラ７側へ揺動するホッパ９により給送ローラ７の外周面に押圧され、該給送ローラ７の駆動回転によって被記録媒体駆動ローラ１０と被記録媒体従動ローラ１１とから構成される被記録媒体送りローラ１２へ向けて１枚ずつ自動給送される。被記録媒体送りローラ１２は、正確なピッチで被記録媒体Ｐをプラテン１７上に搬送する機能を有する。   The recording medium P loaded on the feeding device 5 is pressed against the outer peripheral surface of the feeding roller 7 by a hopper 9 that swings toward the feeding roller 7, and the recording medium is driven by the driving rotation of the feeding roller 7. A sheet is automatically fed one by one toward a recording medium feed roller 12 composed of a roller 10 and a recording medium driven roller 11. The recording medium feed roller 12 has a function of conveying the recording medium P onto the platen 17 at an accurate pitch.

記録装置本体３には、被記録媒体Ｐにインクを噴射して記録を行う記録ヘッド１３を被記録媒体Ｐに対してその幅方向（主走査方向）に往復移動させるためのキャリッジ１５を備えている。キャリッジ１５には、各色のインクが充填された複数のインクカートリッジが着脱可能に搭載され、インクカートリッジから記録ヘッド１３へ各色のインクが供給される。記録ヘッド１３は、プラテン１７と対向する位置で前記幅方向へ往復移動する。記録ヘッド１３のヘッド面には多数のノズルが配列設置されている。   The recording apparatus main body 3 includes a carriage 15 for reciprocally moving a recording head 13 that performs recording by ejecting ink onto the recording medium P with respect to the recording medium P in the width direction (main scanning direction). Yes. A plurality of ink cartridges filled with ink of each color are detachably mounted on the carriage 15, and ink of each color is supplied from the ink cartridge to the recording head 13. The recording head 13 reciprocates in the width direction at a position facing the platen 17. A large number of nozzles are arranged on the head surface of the recording head 13.

記録ヘッドにより記録が実行された被記録媒体Ｐは、排出ローラ２５によって排出される。排出ローラ２５は、複数の排出駆動ローラ２６と排出従動ローラに相当する複数の排出従動歯付きローラ２７とから構成されている。排出ローラ２５と被記録媒体送りローラ１２とは設計上は「実質的に平行」になるように設けられているが、製造誤差等があるためこれらは完全には平行になっていない。
ここで、「実質的に平行」になっているとは、排出ローラ２５と被記録媒体送りローラ１２とが完全に平行になるように意図して設計および製造されているが、製造誤差等の理由で事実上は完全な平行になっていない状態をいう。 The recording medium P on which recording has been performed by the recording head is discharged by the discharge roller 25. The discharge roller 25 includes a plurality of discharge drive rollers 26 and a plurality of discharge driven toothed rollers 27 corresponding to the discharge driven rollers. The discharge roller 25 and the recording medium feed roller 12 are provided so as to be “substantially parallel” by design, but they are not completely parallel due to manufacturing errors and the like.
Here, “substantially parallel” means that the discharge roller 25 and the recording medium feed roller 12 are designed and manufactured so as to be completely parallel, but manufacturing errors, etc. For reasons, it means a state that is virtually not parallel.

図２に示す如く、複数の排出駆動ローラ２６と排出従動歯付きローラ２７とは、被記録媒体Ｐが上流側から排出ローラ２５側へ搬送される際に、被記録媒体Ｐの幅方向の中心線Ｌに関して対称的な位置関係になるように配置されている。これにより、中心線Ｌの左右両側に作用する排出駆動ローラ２６から受ける駆動力の差に起因する被記録媒体Ｐのスキューが防止されている。例えば、ハガキサイズの被記録媒体Ｐでは、図２に示す如く中心線Ｌの両側に２つずつの排出駆動ローラ２６と排出従動歯付きローラ２７とが対称的に配置されている。   As shown in FIG. 2, the plurality of discharge driving rollers 26 and the rollers 27 with discharge driven teeth are the centers in the width direction of the recording medium P when the recording medium P is conveyed from the upstream side to the discharge roller 25 side. They are arranged so as to have a symmetrical positional relationship with respect to the line L. Thereby, the skew of the recording medium P caused by the difference in driving force received from the discharge driving roller 26 acting on the left and right sides of the center line L is prevented. For example, in the postcard size recording medium P, as shown in FIG. 2, two discharge driving rollers 26 and two rollers 27 with discharge driven teeth are arranged symmetrically on both sides of the center line L.

図３に示す如く、排出従動歯付きローラ２７のすぐ上流側には、被記録媒体の前端及び後端の浮き上がり等を抑える押さえ歯付きローラ２９が幅方向に適宜の間隔をあけて従動回転可能に設けられている。尚、本発明では必ずしも押さえ歯付きギザローラ２９を設ける必要はない。図２においては、この押さえ歯付きローラ２９が設けられていない状態で記載されている。   As shown in FIG. 3, on the upstream side of the discharge driven toothed roller 27, a roller 29 with presser teeth that suppresses lifting of the front and rear ends of the recording medium can be driven and rotated at an appropriate interval in the width direction. Is provided. In the present invention, it is not always necessary to provide the pressing roller 29 with the pressing teeth. In FIG. 2, the roller 29 with the presser teeth is not provided.

次に、本発明の特徴的構成について説明する。図２においては排出従動歯付きローラ２７よりやや下方の上流側に、図３においては押さえ歯付きローラ２９よりやや下方の上流側に、被記録媒体Ｐの搬送経路に対して上側となる位置に、負荷付与手段に相当する負荷付与歯付きローラ３１が設けられている。該負荷付与歯付きローラ３１の下端側は、被記録媒体Ｐの前端が接触するように被記録媒体Ｐの搬送経路の一部を横切るように配置されている。更に、負荷付与歯付きローラ３１は、搬送中の被記録媒体Ｐの幅方向の中心線Ｌまたはその延長線上に重なるように配置されている。   Next, a characteristic configuration of the present invention will be described. In FIG. 2, on the upstream side slightly below the discharge driven toothed roller 27, and in FIG. 3 on the upstream side slightly below the pressing toothed roller 29, at a position above the transport path of the recording medium P. A roller 31 with load applying teeth corresponding to the load applying means is provided. The lower end side of the load applying toothed roller 31 is disposed so as to cross a part of the conveyance path of the recording medium P so that the front end of the recording medium P contacts. Furthermore, the roller 31 with load imparting teeth is arranged so as to overlap the center line L in the width direction of the recording medium P being conveyed or an extension line thereof.

従って、被記録媒体Ｐが排出ローラ２５側へ搬送されたときに、被記録媒体Ｐの前端の中央が最初に負荷付与歯付きローラ３１に到達して接触するようになっている。尚、このとき被記録媒体Ｐの負荷付与歯付きローラ３１への接触位置は前端の中央であるので、図４において破線で示す如く、被記録媒体Ｐの前端が負荷付与歯付きローラ３１に到達して接触した時点で被記録媒体Ｐがスキューすることはない。   Therefore, when the recording medium P is conveyed to the discharge roller 25 side, the center of the front end of the recording medium P first reaches the contact roller 31 with load application teeth and comes into contact therewith. At this time, since the contact position of the recording medium P with the load applying toothed roller 31 is the center of the front end, the front end of the recording medium P reaches the load applying toothed roller 31 as shown by a broken line in FIG. Thus, the recording medium P does not skew at the time of contact.

次に作用を説明する。被記録媒体Ｐが負荷付与歯付きローラ３１に到達して接触した後、被記録媒体Ｐは負荷付与歯付きローラ３１の下側を通って、図４において実線で示す如く、被記録媒体Ｐの左右いずれかの前端が排出駆動ローラ２６に到達する。しかし、このとき被記録媒体Ｐの中央には負荷付与歯付きローラ３１が既に接触しているので、その接触部分でグリップ力が作用し、排出駆動ローラ２６に先に到達した側（図４では被記録媒体Ｐの進行方向左側）の送りが遅れがちとなり、後から到達する側の送りが進む傾向となる問題が抑制される。   Next, the operation will be described. After the recording medium P reaches and comes into contact with the load-applying toothed roller 31, the recording medium P passes under the load-applying toothed roller 31, and as shown by a solid line in FIG. Either the left or right front end reaches the discharge drive roller 26. However, at this time, since the roller 31 with load imparting teeth is already in contact with the center of the recording medium P, a grip force acts at the contact portion, and the side that reaches the discharge driving roller 26 first (in FIG. 4). The feeding of the recording medium P on the left side in the advancing direction tends to be delayed, and the problem that the feeding on the side that reaches later tends to advance is suppressed.

即ち図４において、排出駆動ローラ２６に先に到達する被記録媒体Ｐの前端では、被記録媒体Ｐに矢印Ｆで示すような負荷が掛かり、被記録媒体Ｐの中央では矢印Ａで示すモーメントが、また被記録媒体Ｐの右端では矢印Ｂで示すモーメントが作用する。しかし、被記録媒体Ｐの中央には負荷付与歯付きローラ３１が接触しており、その接触部分でグリップ力（矢印Ｃ）が作用するので、被記録媒体Ｐに作用するモーメントの少なくとも一部がグリップ力と相殺して被記録媒体Ｐを回転させる力を低減させる。従って、被記録媒体Ｐの前端が排出駆動ローラ２６に到達する際に、該被記録媒体Ｐのスキューの発生は抑制され、記録画像に境界ができたり、或いは記録に歪みを生じる虞も低減される。   That is, in FIG. 4, a load as indicated by an arrow F is applied to the recording medium P at the front end of the recording medium P that reaches the discharge driving roller 26 first, and a moment indicated by an arrow A is present at the center of the recording medium P. In addition, a moment indicated by an arrow B acts on the right end of the recording medium P. However, the roller 31 with load imparting teeth is in contact with the center of the recording medium P, and grip force (arrow C) acts at the contact portion, so that at least a part of the moment acting on the recording medium P is at least a part. The force for rotating the recording medium P is reduced by canceling the grip force. Therefore, when the front end of the recording medium P reaches the discharge driving roller 26, the occurrence of skew of the recording medium P is suppressed, and the possibility that a boundary is formed in the recorded image or the recording is distorted is also reduced. The

図５に基づいて、本発明の他の実施形態について説明する。本実施形態では、図５に示す如く、負荷付与歯付きローラ３１の代わりに、負荷付与リブ３３が設けられている。負荷付与リブ３３も上述した負荷付与歯付きローラ３１の場合と同様に、搬送中の被記録媒体Ｐの幅方向の中心線Ｌまたはその延長線上に位置する。また負荷付与リブ３３は、被記録媒体Ｐの搬送経路より下側に設けられ、被記録媒体Ｐの搬送経路の一部を横切るように配置されており、被記録媒体Ｐの搬送途中でその前端中央下面が負荷付与リブ３３の頂部に接触するようになっている。この負荷付与リブ３３の作用は、前記負荷付与歯付きローラ３１と同様であって、被記録媒体Ｐの前端の中央が最初に負荷付与リブ３３に接触することで、負荷付与リブ３３と被記録媒体Ｐの下面との接触摩擦力がグリップ力として作用し、排出駆動ローラ２６に先に到達した側の送りが遅れがちとなり、後から到達する側の送りが進む傾向となる問題が抑制される。   Based on FIG. 5, another embodiment of the present invention will be described. In the present embodiment, as shown in FIG. 5, a load applying rib 33 is provided instead of the load applying toothed roller 31. The load applying rib 33 is also located on the center line L in the width direction of the recording medium P being conveyed or its extension line, as in the case of the roller 31 with load applying teeth described above. The load applying rib 33 is provided below the conveyance path of the recording medium P, and is disposed so as to cross a part of the conveyance path of the recording medium P. The central lower surface comes into contact with the top of the load applying rib 33. The action of the load applying rib 33 is the same as that of the roller 31 with the load applying tooth, and the center of the front end of the recording medium P is first brought into contact with the load applying rib 33 so that the load applying rib 33 and the recording medium are recorded. The frictional force of contact with the lower surface of the medium P acts as a grip force, and the problem that the feed on the side that reaches the discharge drive roller 26 tends to be delayed and the feed on the side that reaches later tends to advance is suppressed. .

図６に基づいて、本発明の更に他の実施形態について説明する。この実施形態では、上述した負荷付与歯付きローラ３１を設けた実施形態において、負荷付与歯付きローラ３１のすぐ上流側に被記録媒体Ｐの前端を案内するガイド３５が設けられている。このガイド３５を設けることにより、被記録媒体Ｐの前端を確実に負荷付与歯付きローラ３１の下端付近に到達させることができる。   Still another embodiment of the present invention will be described with reference to FIG. In this embodiment, a guide 35 for guiding the front end of the recording medium P is provided immediately upstream of the load applying toothed roller 31 in the embodiment provided with the load applying toothed roller 31 described above. By providing the guide 35, the front end of the recording medium P can be surely reached near the lower end of the roller 31 with load application teeth.

以上、本発明をインクジェット式記録装置に適用した実施形態について説明したが、記録装置に代わる液体噴射装置に適用することができる。すなわち、被液体噴射媒体の幅方向の中心線の位置を規定した状態で被液体噴射媒体を搬送し、該被液体噴射媒体に液体噴射ヘッドから液体を噴射する液体噴射装置においても、上記同様に本発明を適用することができる。   As described above, the embodiment in which the present invention is applied to the ink jet recording apparatus has been described. However, the present invention can be applied to a liquid ejecting apparatus instead of the recording apparatus. That is, in the liquid ejecting apparatus that transports the liquid ejecting medium in a state where the position of the center line in the width direction of the liquid ejecting medium is defined, and ejects the liquid from the liquid ejecting head to the liquid ejecting medium in the same manner as described above. The present invention can be applied.

本発明を適用したインクジェットプリンタの側断面図。1 is a side sectional view of an ink jet printer to which the present invention is applied. 本発明の一実施形態に係り、被記録媒体送りローラから排出ローラ周辺を示す平面図。FIG. 4 is a plan view showing the periphery of the discharge roller from the recording medium feeding roller according to the embodiment of the present invention. 同被記録媒体送りローラから排出ローラ周辺を示す側断面図。FIG. 3 is a side cross-sectional view showing the periphery of a discharge roller from the recording medium feeding roller. 同負荷付与歯付きローラの作用を説明する模式図。The schematic diagram explaining the effect | action of the roller with the same load provision tooth | gear. 本発明の他の実施形態に係り、負荷付与リブを備えて成る側断面図。The sectional side view which concerns on other embodiment of this invention, and is provided with a load provision rib. 本発明の他の実施形態に係り、ガイド付きの実施形態を示す側断面図。The sectional side view which shows embodiment with guide concerning other embodiment of this invention. 従来の問題点を示す説明図。Explanatory drawing which shows the conventional problem.

符号の説明Explanation of symbols

１ インクジェット式記録装置、３ 記録装置本体、５ 給送装置、６ 被記録媒体サイドガイド装置、７ 給送ローラ、９ ホッパ、１０ 被記録媒体駆動ローラ、１１ 被記録媒体従動ローラ、１２ 被記録媒体送りローラ、１３ 記録ヘッド、１５ キャリッジ、１７ プラテン、２５ 排出ローラ、２６ 排出駆動ローラ、２７ 排出従動歯付きローラ、２９ 押さえ歯付きローラ、３１ 負荷付与歯付きローラ、３３ 負荷付与リブ、３５ ガイド、Ｐ 被記録媒体、Ｌ 被記録媒体の幅方向の中心線   DESCRIPTION OF SYMBOLS 1 Inkjet recording apparatus, 3 recording apparatus main body, 5 feeding apparatus, 6 recording medium side guide apparatus, 7 feeding roller, 9 hopper, 10 recording medium drive roller, 11 recording medium driven roller, 12 recording medium Feed roller, 13 Recording head, 15 Carriage, 17 Platen, 25 Discharge roller, 26 Discharge drive roller, 27 Discharge driven toothed roller, 29 Presser toothed roller, 31 Load imparting toothed roller, 33 Load imparting rib, 35 Guide, P Recording medium, L Center line in the width direction of the recording medium

Claims (6)

複数の排出駆動ローラと排出従動ローラとを備える排出ローラと、
被記録媒体の幅方向の中心線に関して対称的に位置するように前記被記録媒体の搬送経路を規定する被記録媒体サイドガイド手段とを備え、
前記排出ローラの上流であって搬送される前記被記録媒体の幅方向中心線に一致する位置に負荷付与手段が設けられていることを特徴とする被記録媒体搬送装置。 A discharge roller comprising a plurality of discharge drive rollers and a discharge driven roller;
Recording medium side guide means for defining a conveyance path of the recording medium so as to be positioned symmetrically with respect to the center line in the width direction of the recording medium;
A recording medium conveying apparatus, wherein a load applying means is provided at a position that is upstream of the discharge roller and coincides with a center line in the width direction of the recording medium to be conveyed. 請求項１に記載の被記録媒体搬送装置において、前記負荷付与手段は前記被記録媒体の搬送経路の上側に設けられる従動回転自在な負荷付与歯付きローラであり、該負荷付与歯付きローラの下端側は、被記録媒体の搬送経路の一部を横切るように配置されていることを特徴とする被記録媒体搬送装置。   2. The recording medium conveying apparatus according to claim 1, wherein the load applying means is a follower-rotating load applying toothed roller provided on an upper side of the recording medium conveying path, and a lower end of the load applying toothed roller. The recording medium transporting apparatus is characterized in that the side is disposed so as to cross a part of the transport path of the recording medium. 請求項１に記載の被記録媒体搬送装置において、前記負荷付与手段は前記被記録媒体の搬送経路の下側に設けられる負荷付与リブであり、該負荷付与リブの頂部は被記録媒体の搬送経路の一部を横切るように配置されていることを特徴とする被記録媒体搬送装置。   2. The recording medium conveying apparatus according to claim 1, wherein the load applying means is a load applying rib provided on a lower side of the recording medium conveying path, and a top portion of the load applying rib is a conveying path of the recording medium. A recording medium transporting apparatus, wherein the recording medium transporting apparatus is disposed so as to cross a part of the recording medium. 請求項１から３のいずれか１項に記載の被記録媒体搬送装置において、前記被記録媒体を前記負荷付与手段に案内するガイドが前記負荷付与装置の上流側に設けられていることを特徴とする被記録媒体搬送装置。   4. The recording medium transport apparatus according to claim 1, wherein a guide for guiding the recording medium to the load applying unit is provided on an upstream side of the load applying apparatus. Recording medium transporting apparatus. 被記録媒体搬送装置と、
該被記録媒体搬送装置によって搬送される被記録媒体に記録を実行する記録実行部と、を備えた記録装置であって、
前記被記録媒体搬送装置は、請求項１から４のいずれか１項に記載の被記録媒体搬送装置であることを特徴とする記録装置。 A recording medium transport device;
A recording execution unit that performs recording on a recording medium conveyed by the recording medium conveyance apparatus,
The recording apparatus according to claim 1, wherein the recording medium conveyance apparatus is a recording medium conveyance apparatus according to claim 1. 被液体噴射媒体搬送装置と、
該被液体噴射媒体搬送装置によって搬送される被液体噴射媒体に液体噴射を実行する液体噴射実行部と、を備えた液体噴射装置であって、
前記被液体噴射媒体搬送装置は、
複数の排出駆動ローラと排出従動ローラとを備える排出ローラと、
被液体噴射媒体の幅方向の中心線に関して対称的に位置するように前記被液体噴射媒体の搬送経路を規定する被液体噴射媒体サイドガイド手段とを備え、
前記排出ローラの上流であって搬送される前記被液体噴射媒体の幅方向中心線に一致する位置に負荷付与手段が設けられていることを特徴とする液体噴射装置。 A liquid ejecting medium conveying device;
A liquid ejection execution unit that performs liquid ejection on a liquid ejection medium transported by the liquid ejection medium transport apparatus,
The liquid ejecting medium conveying device is
A discharge roller comprising a plurality of discharge drive rollers and a discharge driven roller;
Liquid target medium side guide means for defining a transport path of the liquid target medium so as to be positioned symmetrically with respect to the center line in the width direction of the target liquid medium;
A liquid ejecting apparatus, wherein a load applying unit is provided at a position that is upstream of the discharge roller and coincides with a center line in a width direction of the liquid ejecting medium to be conveyed.
JP2007095652A 2007-03-30 2007-03-30 Conveyance device for medium to be recorded, recorder equipped with this device, and liquid jet apparatus Withdrawn JP2008254219A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08217261A (en) * 1995-02-07 1996-08-27 Seiko Epson Corp Ink jet printer
JPH11245457A (en) * 1998-01-05 1999-09-14 Seiko Epson Corp Printer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08217261A (en) * 1995-02-07 1996-08-27 Seiko Epson Corp Ink jet printer
JPH11245457A (en) * 1998-01-05 1999-09-14 Seiko Epson Corp Printer

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