JP4640584B2 - Recording medium detection device and recording device - Google Patents

Recording medium detection device and recording device Download PDF

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JP4640584B2
JP4640584B2 JP2005093832A JP2005093832A JP4640584B2 JP 4640584 B2 JP4640584 B2 JP 4640584B2 JP 2005093832 A JP2005093832 A JP 2005093832A JP 2005093832 A JP2005093832 A JP 2005093832A JP 4640584 B2 JP4640584 B2 JP 4640584B2
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lever
recording
paper
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recording medium
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直樹 坂元
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セイコーエプソン株式会社
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本発明は、被記録媒体を搬送する搬送路に設けられ、被記録媒体の通過を検出する被記録媒体検出装置およびこれを備えた記録装置に関する。また、本発明は液体噴射装置に関する。   The present invention relates to a recording medium detection apparatus that is provided in a conveyance path for conveying a recording medium and detects the passage of the recording medium, and a recording apparatus including the recording medium detection apparatus. The present invention also relates to 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インクジェット式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。
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。
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 discharges ink from the recording head to perform recording on a recording medium. And a device that ejects a liquid corresponding to the application from a liquid ejecting head corresponding to the ink jet recording head to an ejected medium corresponding to a recording medium, and adheres the liquid to the ejected medium. .
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.
記録装置或いは液体噴射装置の一例としてプリンタがある。プリンタにおいては、被記録媒体或いは被噴射媒体の一例としての用紙を搬送する用紙搬送路の所定の位置に、用紙の先端および後端の通過を検出する用紙検出装置を設け、用紙の先端或いは後端の通過を検出することで、必要な紙送り制御を行う。代表的な用紙検出装置としては、用紙搬送路に回動可能に設けられるレバー状部材と、当該レバー状部材の回動変位を検出する検出手段とを備えたものがある。レバー状部材は、用紙との非接触状態では、付勢手段の付勢力を受けて用紙搬送路に突出し、用紙の通過に伴って用紙と接触すると、回動して用紙搬送路から退避する。   There is a printer as an example of a recording apparatus or a liquid ejecting apparatus. In a printer, a paper detection device that detects passage of the leading edge and the trailing edge of a sheet is provided at a predetermined position in a sheet conveyance path for conveying a sheet as an example of a recording medium or an ejection medium, and the leading edge or the trailing edge of the sheet is provided. Necessary paper feed control is performed by detecting the passage of the edge. As a typical paper detection device, there is one provided with a lever-like member that is rotatably provided in a paper conveyance path, and detection means that detects a rotational displacement of the lever-like member. In a non-contact state with the paper, the lever-like member receives the urging force of the urging means and protrudes into the paper conveyance path. When the lever-shaped member comes into contact with the paper as the paper passes, the lever-like member rotates and retracts from the paper conveyance path.
引用文献1には、レバー状部材に対して用紙搬送路の下流側から上流側に用紙が送られて来る場合、および上流側から下流側に送られて来る場合の、いずれの向きにも支障をきたすことのないよう、紙送り方向にのみ回動し得るよう枢支された主レバーの先端に、立位姿勢への自己復帰習性が付与され、且つ反紙送り方向にのみ回動し得る補助レバーを設けた紙検出装置が開示されている。   In Cited Document 1, there is a problem in either direction when the paper is sent from the downstream side to the upstream side of the paper conveyance path with respect to the lever-like member and when the paper is sent from the upstream side to the downstream side. The tip of the main lever that is pivotally supported so as to be able to rotate only in the paper feeding direction is provided with a self-returning behavior to a standing posture and can be rotated only in the anti-paper feeding direction. A paper detection device provided with an auxiliary lever is disclosed.
特開平8−259037号公報JP-A-8-259037
上記引用文献1記載の紙検出装置によれば、いずれの向きの紙送りにも支障をきたすことがないので、例えば紙ジャム処理時にユーザが用紙を上流側から引き抜いた場合でも、レバー状部材を破損させるといった不具合を回避できる。
しかし当該紙検出装置においてレバー状部材は、主レバーと補助レバーの2体構造となっていることから、部品精度或いは組立精度の関係上、単一形態のレバー状部材に比べて用紙の通過を検出する際の検出精度が劣るとともに、上記のように紙ジャム処理時等に強い力が加えられると、破損し易いという欠点を有していた。
According to the paper detection device described in the above cited document 1, there is no problem in paper feeding in any direction. For example, even when the user pulls out the paper from the upstream side during paper jam processing, the lever-like member is used. It is possible to avoid problems such as damage.
However, since the lever-like member has a two-body structure of a main lever and an auxiliary lever in the paper detection device, the paper can pass through compared to a single-form lever-like member because of component accuracy or assembly accuracy. The detection accuracy at the time of detection is inferior, and when a strong force is applied at the time of paper jam processing as described above, it has a drawback of being easily damaged.
一方で近年、ホームDPEと称されるが如く、銀塩写真並の超高画質印刷を家庭で容易に実現可能なインクジェットプリンタが一般に広く普及しており、そしてこの様なインクジェットプリンタにおいては、銀塩写真と同等な出力結果を得る為に印刷用紙の四辺に余白無しで印刷する所謂縁無し印刷を実行可能に構成されたものが主流となっている。   On the other hand, in recent years, as called home DPE, inkjet printers that can easily realize super high-quality printing comparable to silver salt photographs at home are generally widely used. In such inkjet printers, In order to obtain an output result equivalent to that of a salt photograph, what has been configured to perform so-called borderless printing in which printing is performed without margins on four sides of a printing paper has become the mainstream.
縁無し印刷においては、用紙の端部から外れた領域にもインクを吐出することによって用紙端部に余白無く印刷を行うため、元の画像データの周縁が破棄されるという性質を有しており、従って縁無し印刷においては画像データの破棄量を極力少なくすること、即ち打ち捨てるインク量を少なくすることが望まれている。その為には用紙を高精度に位置決めする必要が生じるが、上記のように2体構造のレバー状部材であると、用紙を高精度に位置決めすることができない場合が生じてしまう。その一方で従来のように紙送り方向にのみ回動可能な単一形態のレバー状部材を用いると、紙ジャム処理時にユーザが用紙を上流側から引き抜いた場合に、レバー状部材を破損させるといった不具合を招く虞がある。   Borderless printing has the property that the periphery of the original image data is discarded because ink is ejected to the edge of the paper without any margins by ejecting ink to the area outside the edge of the paper. Therefore, in borderless printing, it is desired to reduce the discard amount of image data as much as possible, that is, to reduce the amount of ink to be discarded. For this purpose, it is necessary to position the sheet with high accuracy. However, if the lever-like member has a two-body structure as described above, the sheet may not be positioned with high accuracy. On the other hand, if a single lever-like member that can be rotated only in the paper feed direction is used, the lever-like member is damaged when the user pulls out the paper from the upstream side during paper jam processing. There is a risk of causing problems.
そこで本発明はこの様な状況に鑑みなされたものであり、その課題は、単一形態のレバー状部材を用いて高精度に用紙の通過を検出可能であるとともに、ジャム処理時等に用紙が用紙搬送路の上流側から引き抜かれた場合でもレバー状部材を破損させることのない用紙検出装置を得ることにある。   Therefore, the present invention has been made in view of such a situation, and the problem is that it is possible to detect the passage of a sheet with high accuracy using a single-shaped lever-like member, and that the sheet is unloaded during jam processing. An object of the present invention is to obtain a sheet detection device that does not damage the lever-like member even when the sheet is pulled out from the upstream side of the sheet conveyance path.
上記課題を解決するために、本発明の第1の態様は、被記録媒体を搬送する搬送路に設けられるとともに、前記搬送路を遮るように配置されて搬送される被記録媒体と接触し、または、接触が解除されることによりその回動軸を中心に回動変位するレバー状部材と、前記レバー状部材の回動変位を検出する検出手段とを備えた被記録媒体検出装置であって、前記レバー状部材が、前記回動軸を中心に、前記搬送路の上流側方向及び下流側方向の双方向に回動可能に設けられているとともに、搬送される被記録媒体との接触が解除された状態における当該レバー状部材の姿勢を保持する姿勢保持手段を有していることを特徴とする。   In order to solve the above problems, a first aspect of the present invention is provided in a transport path for transporting a recording medium, and is in contact with a recording medium transported by being disposed so as to block the transport path. Alternatively, a recording medium detection apparatus comprising: a lever-like member that is pivotally displaced about its pivot axis when the contact is released; and a detection unit that detects the rotational displacement of the lever-like member. The lever-like member is provided so as to be rotatable in both the upstream direction and the downstream direction of the conveyance path around the rotation axis, and is in contact with the recording medium to be conveyed. It has a posture holding means for holding the posture of the lever-like member in the released state.
上記態様によれば、レバー状部材は、当該レバー状部材そのものが回動軸を中心に搬送路の上流側方向及び下流側方向の双方向に回動可能に設けられていることから、ジャム処理時にユーザが被記録媒体を前記搬送路の上流側から引き抜いた場合でも、レバー状部材がこれに従って上流側方向(本来の動作方向とは反対側の方向)に回動することができ、これによってレバー状部材に強い力が加わることによる当該レバー状部材の破損を防止することができる。また、レバー状部材そのものが回動軸を中心に上流側及び下流側の双方向に回動するので、レバー状部材を二体構造とすることで上流側及び下流側の双方向に回動可能に構成する場合のように、部品精度或いは組立精度の関係で被記録媒体の先端或いは後端の通過を検出する精度を低下させることがないとともに、強度の低下も防止することができる。   According to the above aspect, the lever-like member is provided so that the lever-like member itself can be rotated in both the upstream direction and the downstream direction of the conveyance path around the rotation axis. Even when the user pulls out the recording medium from the upstream side of the transport path, the lever-like member can rotate in the upstream direction (the direction opposite to the original operation direction) accordingly. It is possible to prevent the lever-shaped member from being damaged due to a strong force applied to the lever-shaped member. Also, since the lever-like member itself pivots in both the upstream and downstream directions around the pivot axis, the lever-like member can be pivoted in both upstream and downstream directions by using a two-body structure. As in the case of this configuration, the accuracy of detecting the passage of the leading end or the trailing end of the recording medium is not lowered due to the component accuracy or the assembly accuracy, and the strength can be prevented from being lowered.
更に、レバー状部材は上流側及び下流側の双方向に回動可能に設けられているが、搬送される被記録媒体との接触が解除された状態においては姿勢保持手段によってその姿勢が保持されるので、被記録媒体との接触が解除された状態であるにもかかわらず上流側方向或いは下流側方向に回動してしまうことを防止することができ、即ち誤検出を防止することができる。   Further, the lever-like member is provided so as to be rotatable in both the upstream side and the downstream side. However, when the contact with the recording medium to be transported is released, the posture is held by the posture holding means. Therefore, it is possible to prevent the rotation in the upstream direction or the downstream direction even though the contact with the recording medium is released, that is, it is possible to prevent erroneous detection. .
本発明の第2の態様は、上記第1の態様において、前記姿勢保持手段が、前記レバー状部材が前記搬送路の下流側方向へ回動する方向に前記レバー状部材を付勢する第1の付勢手段と、前記レバー状部材が前記搬送路の上流側方向へ回動する方向に前記レバー状部材を付勢する、前記第1の付勢手段より付勢力が大なる前記第2の付勢手段と、前記回動軸の軸線方向に移動可能に設けられた前記レバー状部材の回動面に形成された凹凸形状と係合可能に設けられるとともに、前記レバー状部材の前記搬送路の上流側方向への回動を規制し、且つ前記レバー状部材の前記搬送路の下流側方向への回動は許容する凹凸形状を備える規制部と、前記レバー状部材を前記規制部に向けて付勢する第3の付勢手段と、を備えて構成されていることを特徴とする。本態様によれば、前記姿勢保持手段が、前記第1乃至第3の付勢手段および前記規制部を備えて構成されていることから、前記姿勢保持手段を構造簡単にして且つ低コストに構成することができる。   According to a second aspect of the present invention, in the first aspect, the posture holding means biases the lever-shaped member in a direction in which the lever-shaped member rotates in the downstream direction of the conveyance path. A biasing force greater than that of the first biasing means for biasing the lever-shaped member in a direction in which the lever-shaped member rotates in the upstream direction of the transport path. An urging means is provided so as to be able to engage with a concavo-convex shape formed on a rotating surface of the lever-like member provided so as to be movable in the axial direction of the rotating shaft, and the conveying path of the lever-like member A restricting portion having an uneven shape that restricts the rotation of the lever-shaped member in the upstream direction and allows the lever-shaped member to rotate in the downstream direction of the conveying path, and the lever-shaped member faces the restricting portion. And a third biasing means for biasing To. According to this aspect, since the posture holding means includes the first to third urging means and the restricting unit, the posture holding means is configured with a simple structure and at a low cost. can do.
本発明の第3の態様は、被記録媒体に記録を行う記録ヘッドを備えた記録装置であって、被記録媒体を搬送する搬送路に、上記第1のまたは第2の態様に記載の前記被記録媒体検出装置を備えていることを特徴とする。本態様によれば、記録装置において上記第1のまたは第2の態様と同様な作用効果を得ることができる。   According to a third aspect of the present invention, there is provided a recording apparatus including a recording head that performs recording on a recording medium. The recording apparatus according to the first or second aspect is provided in a conveyance path that conveys the recording medium. A recording medium detection device is provided. According to this aspect, the same effect as the first or second aspect can be obtained in the recording apparatus.
本発明の第4の態様は、被噴射媒体に液体噴射を行う液体噴射ヘッドと、被噴射媒体を搬送する搬送路に設けられるとともに、前記搬送路を遮るように配置されて搬送される被噴射媒体と接触し、または、接触が解除されることによりその回動軸を中心に回動変位するレバー状部材及び、前記レバー状部材の回動変位を検出する検出手段を備えた被噴射媒体検出装置と、を備えた液体噴射装置であって、前記レバー状部材が、前記回動軸を中心に、前記搬送路の上流側方向及び下流側方向の双方向に回動可能に設けられているとともに、搬送される被噴射媒体との接触が解除された状態における当該レバー状部材の姿勢を保持する姿勢保持手段が設けられていることを特徴とする。   According to a fourth aspect of the present invention, there is provided a liquid ejecting head that ejects liquid onto the ejection target medium, and a transport target that is disposed and transported while being disposed so as to block the transport path. A medium to be ejected comprising a lever-like member that rotates around a rotation axis when the contact with the medium is released, and detection means that detects the rotation displacement of the lever-like member. The lever-like member is provided so as to be rotatable in both the upstream direction and the downstream direction of the transport path around the rotation shaft. In addition, there is provided a posture holding means for holding the posture of the lever-like member in a state where the contact with the ejected medium to be conveyed is released.
以下、本発明の一実施形態について説明する。以下では先ず、本発明の一実施形態に係る「記録装置」、「液体噴射装置」の一例としてのインクジェットプリンタ(以下「プリンタ」と略称する)1の構成について図1を参照しながら概説する。ここで、図1はプリンタ1の用紙搬送路の側断面図である。尚、以下では用紙搬送路(副走査方向)の上流側(図1の右側)を単に「上流側」と言い、用紙搬送路の下流側(図1の左側)を単に「下流側」と言うこととする。   Hereinafter, an embodiment of the present invention will be described. In the following, first, the configuration of an ink jet printer (hereinafter abbreviated as “printer”) 1 as an example of “recording apparatus” and “liquid ejecting apparatus” according to an embodiment of the present invention will be outlined with reference to FIG. Here, FIG. 1 is a side sectional view of the paper conveyance path of the printer 1. In the following, the upstream side (right side in FIG. 1) of the paper transport path (sub-scanning direction) is simply referred to as “upstream side”, and the downstream side (left side in FIG. 1) of the paper transport path is simply referred to as “downstream side”. I will do it.
プリンタ1は、装置後部に「被記録媒体」、「被噴射媒体」の一例としての記録用紙Pを傾斜姿勢で複数枚セット可能な給送装置2を備えている。給送装置2は、ホッパ10と、給送ローラ11と、アイドルローラ14と、摩擦分離材13と、戻しレバー12と、更に例示したこれら以外の種々の構成要素を備えている。ホッパ10は記録用紙Pを傾斜姿勢に支持するとともに、揺動支点10aを中心にカム機構(図示せず)によって揺動駆動され、給送ローラ11に記録用紙Pを圧接させる姿勢と、離間させる姿勢とを切換可能となっている。   The printer 1 includes a feeding device 2 that can set a plurality of recording sheets P as an example of “recording medium” and “jetting medium” in an inclined posture at the rear of the apparatus. The feeding device 2 includes a hopper 10, a feeding roller 11, an idle roller 14, a friction separating member 13, a return lever 12, and various other components than those exemplified above. The hopper 10 supports the recording paper P in an inclined posture, and is driven to swing by a cam mechanism (not shown) around the swinging fulcrum 10a so that the recording paper P is pressed against the feeding roller 11 and separated from the posture. The posture can be switched.
給送ローラ11は側面視略D形の形状を成し、外周にはゴム材が巻回され、図示しないモータによって用紙給送時にのみ選択的に回転駆動される。用紙給送時には、給送ローラ11はその円弧部分によって給送ローラ11に圧接した記録用紙Pの最上位のものを下流側へ給送し、用紙給送が終了すると、下流側の搬送駆動ローラ21による用紙搬送動作の際に搬送負荷を生じさせない様、図示する様に側面視略D形の形状における平坦部が摩擦分離材13と対向する様に駆動制御される。尚、符号14で示すローラは自由回転可能なアイドルローラであり、搬送中の記録用紙Pが給送ローラ11に接して搬送負荷を生じさせない様、搬送中の記録用紙Pと接して従動回転する。   The feeding roller 11 has a substantially D shape when viewed from the side, and a rubber material is wound around the outer periphery thereof. The feeding roller 11 is selectively rotated only when the paper is fed by a motor (not shown). At the time of paper feeding, the feeding roller 11 feeds the uppermost one of the recording paper P pressed against the feeding roller 11 by the arc portion to the downstream side, and when the paper feeding is finished, the downstream side conveyance drive roller In order to prevent a conveyance load from being generated during the sheet conveyance operation by the sheet 21, the drive control is performed so that the flat portion in a substantially D shape in a side view faces the friction separating member 13 as illustrated. Note that a roller indicated by reference numeral 14 is a freely rotatable idle roller, and is rotated in contact with the recording sheet P being conveyed so that the recording sheet P being conveyed does not contact the feeding roller 11 to cause a conveyance load. .
給送ローラ11と対向する位置には摩擦分離材13が設けられている。摩擦分離材13は用紙給送時に給送ローラ11の円弧部分と圧接して圧接点を形成し、これにより、給送されるべき最上位の記録用紙Pと、重送されようとする次位以降の記録用紙Pとを分離する。また、給送ローラ11と対向する位置には紙戻しレバー12が設けられている。紙戻しレバー12は揺動支点12aを中心に揺動可能に設けられ、給送ローラ11の1回転動作中に、図1に示す待機状態から記録用紙Pの給送経路を開放する様に一旦倒れ、そして再び図1に示す様に起き上がることにより、重送されようとした次位以降の記録用紙Pをホッパ10上に戻す。   A friction separating material 13 is provided at a position facing the feeding roller 11. The friction separating material 13 is pressed against the arc portion of the feeding roller 11 when the paper is fed to form a pressure contact, whereby the uppermost recording paper P to be fed and the next order to be fed multiple times. The subsequent recording paper P is separated. A paper return lever 12 is provided at a position facing the feed roller 11. The paper return lever 12 is provided so as to be able to swing around a swinging fulcrum 12a. During the one rotation operation of the feeding roller 11, the paper return lever 12 is temporarily set so as to open the feeding path of the recording paper P from the standby state shown in FIG. By falling and rising again as shown in FIG. 1, the next and subsequent recording sheets P about to be double fed are returned onto the hopper 10.
以上が給送装置2であり、給送装置2の下流側には、給送ローラ11と搬送駆動ローラ21との間に、「レバー状部材」としてのレバー15と、「検出手段」としての検出部16とを備えて構成された、「被記録媒体(被噴射媒体)検出装置」としての紙検出器17が設けられている。レバー15は回動軸15aを中心に、用紙搬送路を側視して時計回り方向および反時計回り方向に回動可能に設けられ、且つ、上部の接触端15bが、給送される記録用紙Pと接触可能に構成されている。   The above is the feeding device 2. On the downstream side of the feeding device 2, a lever 15 as a “lever-like member” and a “detecting means” are provided between the feeding roller 11 and the transport driving roller 21. A paper detector 17 serving as a “recording medium (jetting medium) detection device” configured to include the detection unit 16 is provided. The lever 15 is provided so as to be pivotable in a clockwise direction and a counterclockwise direction with the pivot shaft 15a as a center, as viewed from the side of the sheet conveyance path, and the upper contact end 15b has a recording sheet to be fed. It is configured to be able to contact P.
レバー15の回動変位を検出する検出部16は光学センサであり、レバー15の回動軸15aから下側に延びる接触端15cが図示する様に検出部16に入り込むことにより、発光部から受光部へ向かう光が遮断され、記録用紙Pの未通過状態が検出される。そして、レバー15が、記録用紙Pの通過に伴って回動すると、接触端15cが検出部16から外れ、これにより、記録用紙P先端の通過を検出することができる様になっている。また、記録用紙P後端が通過すると、再び接触端15cが検出部16に入り込み、これにより、記録用紙P後端の通過を検出可能となる。尚、紙検出器17については後に詳述する。   The detection unit 16 that detects the rotational displacement of the lever 15 is an optical sensor, and the contact end 15c extending downward from the rotation shaft 15a of the lever 15 enters the detection unit 16 as shown in the figure, thereby receiving light from the light emitting unit. The light traveling toward the part is blocked, and the non-passing state of the recording paper P is detected. When the lever 15 rotates with the passage of the recording paper P, the contact end 15c is disengaged from the detection unit 16, and thereby the passage of the leading edge of the recording paper P can be detected. Further, when the rear end of the recording paper P passes, the contact end 15c enters the detection unit 16 again, whereby the passage of the rear end of the recording paper P can be detected. The paper detector 17 will be described in detail later.
次に、紙検出器17の下流側には、搬送駆動ローラ21と搬送従動ローラ22とが設けられている(以下当該ローラ対を適宜「搬送ローラ」と言う)。搬送駆動ローラ21は図示しないモータによって回転駆動され、搬送従動ローラ22は、搬送駆動ローラ21に圧接して従動回転する。そして、給送ローラ11によって給送された記録用紙Pは当該搬送ローラにニップされ、インクジェット記録ヘッド(以下「記録ヘッド」と言う)26の下へと搬送される。   Next, a conveyance driving roller 21 and a conveyance driven roller 22 are provided on the downstream side of the paper detector 17 (hereinafter, the roller pair is appropriately referred to as “conveyance roller”). The transport driving roller 21 is rotationally driven by a motor (not shown), and the transport driven roller 22 is pressed against the transport driving roller 21 and rotated. The recording paper P fed by the feeding roller 11 is nipped by the transport roller and transported under an ink jet recording head (hereinafter referred to as “recording head”) 26.
搬送従動ローラ22を軸支する搬送従動ローラホルダ20の下流側端部には、自由回転可能なガイドローラ23が設けられている。ガイドローラ23は、記録用紙Pのプラテン28からの浮き上がりを防止する為のローラであり、これにより、記録用紙Pと記録ヘッド14との距離が一定に保たれ、記録品質の低下やヘッド擦れを防止する。   A free-rotating guide roller 23 is provided at the downstream end of the transport driven roller holder 20 that pivotally supports the transport driven roller 22. The guide roller 23 is a roller for preventing the recording paper P from being lifted off the platen 28, so that the distance between the recording paper P and the recording head 14 is kept constant, so that the recording quality is reduced and the head is rubbed. To prevent.
次に、搬送ローラの下流側には、記録ヘッド26とプラテン28とが上下に対向する様に設けられている。記録ヘッド26はキャリッジ25の底部に設けられ、液体の一例としてのインク滴を記録用紙Pに向けて吐出(噴射)することにより、記録(印刷)を実行する。キャリッジ25は主走査方向に延びるキャリッジガイド板27によって主走査方向に案内されつつ、図示しないモータの動力によって主走査方向に駆動される。   Next, the recording head 26 and the platen 28 are provided on the downstream side of the conveying roller so as to face each other. The recording head 26 is provided at the bottom of the carriage 25 and performs recording (printing) by ejecting (jetting) ink droplets as an example of liquid toward the recording paper P. The carriage 25 is driven in the main scanning direction by the power of a motor (not shown) while being guided in the main scanning direction by a carriage guide plate 27 extending in the main scanning direction.
プラテン28は、記録用紙Pを下から支持することにより、記録用紙Pと記録ヘッド26との間のギャップを規定する。プラテン28において記録ヘッド26と対向する面には、凹部28aが形成されている。これは、記録用紙Pに余白無く印刷を行う為のものであり、記録用紙Pの端部にインク滴を吐出する際に、記録用紙P端部から外れた部分にもインク滴を吐出し、そして凹部28aへと打ち捨てることにより、所謂縁無し印刷が実行される。尚、凹部28aには、インク滴を吸収するインク吸収材29が配設されている。凹部28aに打ち捨てられたインク滴は図示しない排出孔から下部へ排出され、そしてプラテン28の下部には、この排出されたインク滴を受ける廃液トレイ30が設けられている。廃液トレイ30の内部には廃液吸収材31が設けられ、廃液トレイ30内のインク廃液を確実に保持する。   The platen 28 defines the gap between the recording paper P and the recording head 26 by supporting the recording paper P from below. A concave portion 28 a is formed on the surface of the platen 28 facing the recording head 26. This is for printing without margins on the recording paper P. When ink droplets are ejected to the edge of the recording paper P, ink droplets are ejected to the part off the recording paper P, Then, so-called borderless printing is performed by discarding into the concave portion 28a. An ink absorbing material 29 that absorbs ink droplets is disposed in the recess 28a. The ink droplets discarded in the recess 28a are discharged downward from a discharge hole (not shown), and a waste liquid tray 30 for receiving the discharged ink droplets is provided below the platen 28. A waste liquid absorber 31 is provided inside the waste liquid tray 30 to reliably hold the ink waste liquid in the waste liquid tray 30.
記録ヘッド26の下流側には、第1排出駆動ローラ36と、第1排出従動ローラ37と、第2排出駆動ローラ38と、第2排出従動ローラ39とが設けられている。第1排出駆動ローラ36及び第2排出駆動ローラ38は図示しない駆動モータによって回転駆動され、第1排出従動ローラ37は、第1排出駆動ローラ36に接して従動回転する。そして、記録が行われた記録用紙Pは、第1排出駆動ローラ36と第1排出従動ローラ37とによってニップされることにより、図示しないスタッカへ向けて排出される。尚、第2排出駆動ローラ38及び第2排出従動ローラ39は、第1排出駆動ローラ36及び第1排出従動ローラ37から送り出された記録用紙Pの後端を、図示しないスタッカに向けて確実に落とす機能を果たす。   On the downstream side of the recording head 26, a first discharge driving roller 36, a first discharge driven roller 37, a second discharge drive roller 38, and a second discharge driven roller 39 are provided. The first discharge drive roller 36 and the second discharge drive roller 38 are rotationally driven by a drive motor (not shown), and the first discharge driven roller 37 is driven to rotate in contact with the first discharge drive roller 36. The recording paper P on which recording has been performed is discharged toward a stacker (not shown) by being nipped by the first discharge driving roller 36 and the first discharge driven roller 37. Note that the second discharge driving roller 38 and the second discharge driven roller 39 ensure that the rear end of the recording paper P fed from the first discharge drive roller 36 and the first discharge driven roller 37 is directed toward a stacker (not shown). It fulfills the function of dropping.
以上がプリンタ1の大略構成であり、以下図2乃至図5を参照しながら紙検出器17について詳説する。ここで図2は紙検出器17の斜視図、図3は同側面図、図4及び図5は紙検出器17を下方から見た平面図であり、図4はレバー15が記録用紙Pと接触していない状態(立位姿勢にある状態)を、図5はレバー15が上流側方向に回動した状態を示している。   The above is the general configuration of the printer 1, and the paper detector 17 will be described in detail below with reference to FIGS. 2 is a perspective view of the paper detector 17, FIG. 3 is a side view thereof, FIGS. 4 and 5 are plan views of the paper detector 17 viewed from below, and FIG. FIG. 5 shows a state in which the lever 15 is rotated in the upstream direction, in a state where it is not in contact (a state where it is in a standing posture).
図2及び図3に示すように、レバー15は、回動軸15aと、回動軸15aから上側の接触端15bと、回動軸15aから下側の被検出端15cと、「第1の付勢手段」としての引っ張りコイルばね40を掛止するばね掛止部15dと、「第2の付勢手段」としての引っ張りコイルばね41を掛止するばね掛止部15eと、が樹脂成形によって一体的に(単一体として)形成されて成る。   As shown in FIGS. 2 and 3, the lever 15 includes a rotation shaft 15 a, a contact end 15 b on the upper side from the rotation shaft 15 a, a detected end 15 c on the lower side from the rotation shaft 15 a, A spring latching portion 15d for latching the tension coil spring 40 as "biasing means" and a spring latching portion 15e for latching the tension coil spring 41 as "second biasing means" are formed by resin molding. It is formed integrally (as a single body).
回動軸15aは、用紙搬送路の下側に設けられた紙案内部材18(図1)に回動可能に軸支され、これによってレバー15そのものが、用紙搬送路を側視して上流側方向及び下流側方向の双方向に回動可能に軸支される(詳細は後述)。尚、レバー15が下流側方向に回動するとは、図3の符号15b’で示すように接触端15bが下流側方向に回動する(倒れる)場合のレバー15の回動を意味し、レバー15が上流側方向に回動するとは、図3の符号15b’’で示すように接触端15bが上流側方向に回動する(倒れる)場合のレバー15の回動を意味する。   The rotation shaft 15a is pivotally supported by a paper guide member 18 (FIG. 1) provided on the lower side of the paper conveyance path so that the lever 15 itself is located upstream from the side of the paper conveyance path. It is pivotally supported so as to be rotatable in both directions and downstream directions (details will be described later). The lever 15 rotating in the downstream direction means the rotation of the lever 15 when the contact end 15b rotates (falls) in the downstream direction as indicated by reference numeral 15b 'in FIG. The fact that 15 rotates in the upstream direction means that the lever 15 rotates when the contact end 15b rotates (falls down) in the upstream direction as indicated by reference numeral 15b ″ in FIG.
被検出端15cは、レバー15が記録用紙Pと接触しない状態において、回動軸15aからほぼ真っ直ぐ下に延び、その下端部が、レバー15が記録用紙Pと接触しない状態においては検出部16に入り込み、レバー15が記録用紙Pと接触して回動することにより、検出部16から外れる。   The detected end 15c extends almost straight down from the rotating shaft 15a when the lever 15 is not in contact with the recording paper P, and the lower end of the detected end 15c is the detection unit 16 when the lever 15 is not in contact with the recording paper P. When the lever 15 enters and rotates in contact with the recording paper P, the lever 15 is detached from the detection unit 16.
ばね掛止部15d、15eはフック形状を成し、ばね掛止部15dは用紙搬送路の上流側(図3の右側)に、ばね掛止部15eは用紙搬送路の下流側(図3の左側)に形成されていて、それぞれ引っ張りコイルばね40、41の一端が掛止する。引っ張りコイルばね41、41の他端は図示しないばね掛止部に掛止し、これによってレバー15は、給送装置2から送られてくる記録用紙Pと接触して下流側に回動する場合(図3において符号15b’)には、引っ張りコイルばね41の付勢力に抗して回動することになる。   The spring latching portions 15d and 15e have a hook shape, the spring latching portion 15d is on the upstream side (right side in FIG. 3), and the spring latching portion 15e is on the downstream side (in FIG. 3). Left end) and one end of each of the tension coil springs 40 and 41 is hooked. When the other ends of the tension coil springs 41 and 41 are hooked on a spring hooking portion (not shown), and thereby the lever 15 contacts the recording paper P sent from the feeding device 2 and rotates downstream. (Reference numeral 15b ′ in FIG. 3), it rotates against the urging force of the tension coil spring 41.
また、紙ジャム処理時等に記録用紙Pが上流側から引き抜かれることで上流側に回動する場合(図3において符号15b’’)には、引っ張りコイルばね40の付勢力に抗して回動することになる。即ち、引っ張りコイルばね40は、レバー15が下流側方向へ回動する方向に当該レバー15を付勢し、引っ張りコイルばね41は、レバー15が上流側方向へ回動する方向に当該レバー15を付勢する。   Further, when the recording paper P is pulled out from the upstream side during paper jam processing or the like and rotated upstream (reference numeral 15b ″ in FIG. 3), the recording paper P rotates against the urging force of the tension coil spring 40. Will move. That is, the tension coil spring 40 biases the lever 15 in the direction in which the lever 15 rotates in the downstream direction, and the tension coil spring 41 causes the lever 15 in the direction in which the lever 15 rotates in the upstream direction. Energize.
接触端15bは、図3に示すように給送装置2から送られてくる(上流側から下流側に進む)記録用紙Pの先端が当接する当接面Aと、記録用紙Pのうら面と接する接触面(平坦面)Bと、紙ジャム処理時等に上流側から引き抜かれる記録用紙Pの先端が当接する当接面Cとを備え、図示する様に略逆L字形の形状を成す様に形成されている。   As shown in FIG. 3, the contact end 15 b includes a contact surface A on which the leading edge of the recording paper P sent from the feeding device 2 (advanced from the upstream side to the downstream side) contacts, and a back surface of the recording paper P. A contacting surface (flat surface) B and a contact surface C with which the leading end of the recording paper P withdrawn from the upstream side during paper jam processing comes into contact have a substantially inverted L shape as shown. Is formed.
ここで、接触端15bは、図示するように回動軸15aから真っ直ぐに上方に延びるのではなく、一旦下流側に向けて斜め上方に延びた後に、ほぼ真っ直ぐ上方に延び、そしてその先端が下流側に向けて折れ曲がることで、略逆L字形の形状を成す様に形成されている。つまり、記録用紙Pとの非接触状態において、接触面Bが、回動軸15aに対して下流側に位置する様に形成されているので、レバー15の揺動角度を小さく抑えることができ、レバー15の配置スペースを小さくすることができる。   Here, the contact end 15b does not extend straight upward from the rotation shaft 15a as shown in the drawing, but extends once obliquely upward toward the downstream side, and then extends almost straight upward, and its tip is downstream. By being bent toward the side, it is formed so as to form a substantially inverted L shape. That is, in the non-contact state with the recording paper P, the contact surface B is formed so as to be positioned on the downstream side with respect to the rotation shaft 15a, so that the swing angle of the lever 15 can be suppressed to be small. The arrangement space of the lever 15 can be reduced.
また、当接面Aが、用紙搬送路をほぼ垂直に横切る様に設けられていることから、記録用紙Pの先端が当接面Aのどの部分に当接しても、レバー15は殆ど同じタイミングで回動し、従って記録用紙P先端の通過タイミングにばらつきが生じることがなく、記録用紙Pの通過を正確に検出することができる。   In addition, since the contact surface A is provided so as to cross the paper conveyance path substantially perpendicularly, the lever 15 has almost the same timing regardless of which portion of the contact surface A the front end of the recording paper P contacts. Therefore, the passage timing of the leading edge of the recording paper P does not vary, and the passage of the recording paper P can be accurately detected.
更に、記録用紙Pの後端が搬送駆動ローラ21(図1)の上流側近傍に到達した状態では、記録用紙Pの後端が上方に反り返る様な状態となるので、この様な状態の記録用紙P後端に、接触端15bが下から接触し、しかも引っ張りコイルばね41の付勢力によって記録用紙P後端を上方に持ち上げる様な力を記録用紙P後端に付与することから、接触端15bが記録用紙P後端から外れ易い状態となっている。しかし、接触端15bの頂部が、平坦面から成る接触面Bによって成されているので、記録用紙Pと面接触することにより、レバー15の状態が安定し、記録用紙P後端が通過する際にも、不適切な位置で接触端15bが外れることがなく、記録用紙P後端の通過を正確に検出することができる。   Furthermore, when the trailing edge of the recording paper P reaches the vicinity of the upstream side of the transport driving roller 21 (FIG. 1), the trailing edge of the recording paper P warps upward. The contact end 15b comes into contact with the rear end of the paper P from below, and a force that lifts the rear end of the recording paper P upward by the urging force of the tension coil spring 41 is applied to the rear end of the recording paper P. 15b is easily detached from the rear end of the recording paper P. However, since the top of the contact end 15b is formed by the contact surface B that is a flat surface, the surface of the lever 15 is stabilized by the surface contact with the recording paper P, and the rear end of the recording paper P passes. In addition, the contact end 15b does not come off at an inappropriate position, and the passage of the rear end of the recording paper P can be accurately detected.
加えて、接触端15bは、その先端が下流側を向くような略逆L字形の形状に形成されている為、記録用紙Pへ与える力の成分がより一層用紙搬送路と直交する方向に向かい、これによって接触端15bが更に記録用紙P後端から外れ難くなり、この様な作用効果により、記録用紙P後端の通過をより一層正確に検出することが可能となる。
更に加えて、本実施形態においては、レバー15を用紙搬送路の下から上に突出する様に設けていることから、接触端15bは記録用紙Pのうら面と接触し、これにより、記録面にダメージを与えることがない。
In addition, since the contact end 15b is formed in a substantially inverted L shape so that the tip thereof faces the downstream side, the force component applied to the recording paper P is further directed in a direction perpendicular to the paper transport path. As a result, the contact end 15b is further unlikely to come off from the rear end of the recording paper P, and it is possible to more accurately detect the passage of the rear end of the recording paper P by such an effect.
In addition, in this embodiment, since the lever 15 is provided so as to protrude upward from the bottom of the paper transport path, the contact end 15b comes into contact with the back surface of the recording paper P, thereby the recording surface. It will not damage you.
続いてレバー15を立位姿勢(図3に示す姿勢)に保持する姿勢保持手段17について説明する。図4及び図5に示すように、レバー15の回動軸15aには、レバー15を挟むようにストッパ46と規制部45とが配設されている。このストッパ46と規制部45は、回動軸15aが軸通するとともに、レバー15が回動しても、これにつられて回動しないように図示しないフレーム部材に固定的に設けられている。   Next, the posture holding means 17 for holding the lever 15 in the standing posture (the posture shown in FIG. 3) will be described. As shown in FIGS. 4 and 5, the rotation shaft 15 a of the lever 15 is provided with a stopper 46 and a restricting portion 45 so as to sandwich the lever 15. The stopper 46 and the restricting portion 45 are fixedly provided on a frame member (not shown) so that the rotation shaft 15a passes through and the lever 15 does not rotate even if the lever 15 rotates.
ストッパ46と規制部45との間においてレバー15は回動軸15aの軸線方向(図4及び図5の左右方向)に移動可能となっており、更にストッパ46とレバー15との間には圧縮バネ42が設けられて、これによってレバー15の回動面Dが規制部45に圧接するように設けられている。   Between the stopper 46 and the restricting portion 45, the lever 15 is movable in the axial direction of the rotating shaft 15a (the left and right direction in FIGS. 4 and 5), and further between the stopper 46 and the lever 15 is compressed. A spring 42 is provided so that the rotation surface D of the lever 15 is in pressure contact with the restricting portion 45.
レバー15において回動面Dには「凹凸形状」としての段部15fが形成されていて、規制部45において回動面Dと対向する側には、段部15fとちょうど嵌合する「凹凸形状」としての段部45aが形成されている。段部15fと段部45aの嵌合形状は、レバー15の上流側方向への回動を規制し、且つ下流側方向への回動は許容するような凹凸形状であり、即ちレバー15が下流側方向へ回動する場合にはレバー15は規制部45から規制力を受けないが、レバー15が上流側方向へ回動する場合には、図5に示すように圧縮ばね42の付勢力に抗して段部15fが段部45aの斜面を乗り越える必要があるので、レバー15は上流側方向への回動に際して規制部45から規制(所定の力)を受ける様になっている。   In the lever 15, a stepped portion 15 f as an “uneven shape” is formed on the rotating surface D, and on the side facing the rotating surface D in the restricting portion 45, an “uneven shape” that just fits the stepped portion 15 f. As shown in FIG. The fitting shape of the step portion 15f and the step portion 45a is an uneven shape that restricts the rotation of the lever 15 in the upstream direction and permits the rotation in the downstream direction, that is, the lever 15 is downstream. When the lever 15 is rotated in the lateral direction, the lever 15 does not receive a regulating force from the regulating portion 45. However, when the lever 15 is pivoted in the upstream direction, the biasing force of the compression spring 42 is applied as shown in FIG. On the other hand, since the step portion 15f needs to climb over the slope of the step portion 45a, the lever 15 receives a restriction (predetermined force) from the restriction portion 45 when rotating in the upstream direction.
尚、引っ張りコイルばね41の付勢力は、引っ張りコイルばね40の付勢力よりも大なるように設定されており、これによって図4に示すような段部15fと段部45aとの嵌合状態が保持される、即ちレバー15の立位姿勢が保持されるようになっている。以上により、引っ張りコイルばね40、41と、圧縮ばね42と、規制部45は、レバー15の姿勢を保持する姿勢保持手段47を構成する。   Note that the urging force of the tension coil spring 41 is set to be larger than the urging force of the tension coil spring 40, whereby the fitting state between the step portion 15f and the step portion 45a as shown in FIG. It is held, that is, the standing posture of the lever 15 is held. As described above, the tension coil springs 40 and 41, the compression spring 42, and the restricting portion 45 constitute the posture holding means 47 that holds the posture of the lever 15.
以上のように構成された紙検出器17においては、上述の通りレバー15は回動軸15aを中心に用紙搬送路の上流側方向及び下流側方向の双方向に回動可能に設けられていることから、ジャム処理時にユーザが記録用紙Pを上流側から引き抜いた場合でも、レバー15がこれに従って上流側方向(本来の動作方向とは反対側の方向)に回動することができ、これによってレバー15に強い力が加わることによる当該レバー15の破損を防止することができる。   In the paper detector 17 configured as described above, as described above, the lever 15 is provided so as to be rotatable in both the upstream direction and the downstream direction of the sheet conveyance path around the rotation shaft 15a. Therefore, even when the user pulls out the recording paper P from the upstream side during the jam processing, the lever 15 can rotate in the upstream direction (the direction opposite to the original operation direction) accordingly. It is possible to prevent the lever 15 from being damaged due to a strong force applied to the lever 15.
また、レバー15そのものが回動軸15aを中心に上流側及び下流側の双方向に回動するので、レバー15を二体構造とすることで上流側及び下流側の双方向に回動可能に構成する場合のように、部品精度或いは組立精度の関係で記録用紙Pの先端或いは後端の通過を検出する精度を低下させることがないとともに、強度の低下も防止することができる。特に、記録用紙Pを高精度に位置決めすることができることで、記録用紙Pの始端や終端に縁無し印刷を行う場合にあっては、始端や終端の画像の破棄量を極めて少なくすることができる。   In addition, since the lever 15 itself rotates in both the upstream and downstream directions around the rotation shaft 15a, the lever 15 can be rotated in both the upstream and downstream directions by using a two-body structure. As in the case of the configuration, the accuracy of detecting the passage of the leading end or the trailing end of the recording paper P is not lowered due to the component accuracy or the assembly accuracy, and the strength can be prevented from being lowered. In particular, since the recording paper P can be positioned with high precision, when performing borderless printing at the start and end of the recording paper P, the discard amount of the image at the start and end can be extremely reduced. .
更に、レバー15は上流側及び下流側の双方向に回動可能に設けられているが、搬送される記録用紙Pとの接触が解除された状態においては姿勢保持手段47によってその姿勢が保持されるので、上流側或いは下流側のいずれの方向に回動した場合にも図3に示す立位姿勢に復帰することとなり、記録用紙Pとの接触が解除された状態であるにもかかわらず上流側方向或いは下流側方向に回動してしまうことを防止することができ、即ち記録用紙Pの先端或いは後端の通過を誤検出することを防止することができる。   Further, the lever 15 is provided so as to be rotatable in both the upstream side and the downstream side. However, when the contact with the recording paper P being conveyed is released, the posture is held by the posture holding means 47. Therefore, even if it is rotated in either the upstream side or the downstream side, it returns to the standing posture shown in FIG. 3, and the upstream is in spite of the state that the contact with the recording paper P is released. It is possible to prevent rotation in the lateral direction or downstream direction, that is, it is possible to prevent erroneous detection of the passage of the leading edge or the trailing edge of the recording paper P.
本発明に係るプリンタの用紙搬送路の側断面図。FIG. 3 is a side sectional view of a paper conveyance path of the printer according to the present invention. 本発明に係る紙検出器の斜視図。The perspective view of the paper detector which concerns on this invention. 本発明に係る紙検出器の側面図Side view of a paper detector according to the present invention 本発明に係る紙検出器を下から見た平面図。The top view which looked at the paper detector which concerns on this invention from the bottom. 本発明に係る紙検出器を下から見た平面図。The top view which looked at the paper detector which concerns on this invention from the bottom.
符号の説明Explanation of symbols
1 インクジェットプリンタ、2 給送装置、10 ホッパ、11 給送ローラ、12 紙戻しレバー、13 摩擦分離材、14 アイドルローラ、15 レバー、15a 回動軸、15b 接触端、15c 被検出端、15d、15e ばね掛止部、15f 段部、16 検出部、17 紙検出器、20 搬送従動ローラホルダ、21 搬送駆動ローラ、22 搬送従動ローラ、23 ガイドローラ、25 キャリッジ、26 記録ヘッド、27 キャリッジガイド板、28 プラテン、29 インク吸収材、30 廃液トレイ、31 廃液吸収材、33 フレーム、36 第1排出駆動ローラ、37 第1排出従動ローラ、38 第2排出駆動ローラ、39 第2排出従動ローラ、40、41 引っ張りコイルばね、42 圧縮ばね、45 規制部、45a 段部、46 ストッパ、P 記録用紙 DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 Feeding device, 10 Hopper, 11 Feed roller, 12 Paper return lever, 13 Friction separation material, 14 Idle roller, 15 Lever, 15a Rotating shaft, 15b Contact end, 15c Detected end, 15d, 15e Spring latching part, 15f Step part, 16 detection part, 17 paper detector, 20 transport driven roller holder, 21 transport drive roller, 22 transport driven roller, 23 guide roller, 25 carriage, 26 recording head, 27 carriage guide plate , 28 Platen, 29 Ink absorber, 30 Waste tray, 31 Waste absorber, 33 Frame, 36 First discharge drive roller, 37 First discharge driven roller, 38 Second discharge drive roller, 39 Second discharge driven roller, 40 41 Spring coil spring, 42 Compression spring, 45 Regulator, 45a Step 46 Stopper, P Recording paper

Claims (2)

  1. 被記録媒体を搬送する搬送路に設けられるとともに、前記搬送路を遮るように配置されて搬送される被記録媒体と接触し、または、接触が解除されることによりその回動軸を中心に回動変位するレバー状部材と、前記レバー状部材の回動変位を検出する検出手段とを備えた被記録媒体検出装置であって、
    前記レバー状部材が、前記回動軸を中心に、前記搬送路の上流側方向及び下流側方向の双方向に回動可能に設けられているとともに、搬送される被記録媒体との接触が解除された状態における当該レバー状部材の姿勢を保持する姿勢保持手段を有し
    前記姿勢保持手段が、前記レバー状部材が前記搬送路の下流側方向へ回動する方向に前記レバー状部材を付勢する第1の付勢手段と、
    前記レバー状部材が前記搬送路の上流側方向へ回動する方向に前記レバー状部材を付勢する、前記第1の付勢手段より付勢力が大なる第2の付勢手段と、
    前記回動軸の軸線方向に移動可能に設けられた前記レバー状部材の回動面に形成された段部と係合可能な段部を有する規制部と
    前記レバー状部材を前記規制部に向けて付勢する第3の付勢手段と、を備えて構成され、
    前記レバー状部材に形成された段部と前記規制部に形成された段部は、前記レバー状部材が前記搬送路の下流側方向へ回動する際には前記レバー状部材に形成された段部が前記規制部に形成された段部から離れ、前記レバー状部材が前記搬送路の上流側方向へ回動する際には前記レバー状部材に形成された段部が前記規制部に形成された段部を前記第3の付勢手段の付勢力に抗して乗り越える位置関係である、
    ことを特徴とする被記録媒体検出装置。
    It is provided in a transport path for transporting the recording medium, and is placed around the transport path so as to contact or be released from contact with the recording medium transported. A recording medium detection apparatus comprising: a lever-like member that is dynamically displaced; and a detection unit that detects rotational displacement of the lever-like member.
    The lever-like member is provided so as to be rotatable in both directions upstream and downstream of the conveyance path around the rotation axis, and contact with the recording medium being conveyed is released. has a posture holding means for holding the posture of the lever-shaped member of the state,
    The posture holding means is a first urging means for urging the lever-like member in a direction in which the lever-like member rotates in the downstream direction of the transport path;
    A second urging unit that urges the lever-shaped member in a direction in which the lever-shaped member rotates in the upstream direction of the transport path and has a larger urging force than the first urging unit;
    A restricting portion having a step portion engageable with a step portion formed on a turning surface of the lever-like member provided movably in the axial direction of the turning shaft;
    A third urging means for urging the lever-shaped member toward the restricting portion,
    The step formed on the lever-shaped member and the step formed on the restricting portion are formed on the lever-shaped member when the lever-shaped member rotates in the downstream direction of the conveyance path. When the lever is separated from the step portion formed in the restricting portion and the lever-like member rotates in the upstream direction of the transport path, the step portion formed in the lever-like member is formed in the restricting portion. Is a positional relationship overcoming the stepped portion against the biasing force of the third biasing means,
    A recording medium detection apparatus characterized by the above.
  2. 被記録媒体に記録を行う記録ヘッドを備えた記録装置であって、被記録媒体を搬送する搬送路に、請求項1に記載の前記被記録媒体検出装置を備えている、
    ことを特徴とする記録装置。
    A recording apparatus comprising a recording head for recording on a recording medium, wherein the recording medium detection apparatus according to claim 1 is provided in a conveyance path for conveying the recording medium.
    A recording apparatus.
JP2005093832A 2005-03-29 2005-03-29 Recording medium detection device and recording device Expired - Fee Related JP4640584B2 (en)

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JP5799601B2 (en) * 2011-06-17 2015-10-28 ブラザー工業株式会社 Transport device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61241173A (en) * 1985-04-18 1986-10-27 Canon Inc Printer
JPH07296120A (en) * 1994-04-28 1995-11-10 Sankyo Seiki Mfg Co Ltd Neutral position holding mechanism for oscillating object and detecting mechanism for reciprocatively moving object
JPH0825723A (en) * 1994-07-19 1996-01-30 Mitsubishi Electric Corp Knob device for form feed in printer
JPH08259037A (en) * 1995-03-22 1996-10-08 Seiko Epson Corp Paper sheet detector of printer
JP2004352416A (en) * 2003-05-28 2004-12-16 Seiko Epson Corp Lever for detection of pass of recorded medium, and recording device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61241173A (en) * 1985-04-18 1986-10-27 Canon Inc Printer
JPH07296120A (en) * 1994-04-28 1995-11-10 Sankyo Seiki Mfg Co Ltd Neutral position holding mechanism for oscillating object and detecting mechanism for reciprocatively moving object
JPH0825723A (en) * 1994-07-19 1996-01-30 Mitsubishi Electric Corp Knob device for form feed in printer
JPH08259037A (en) * 1995-03-22 1996-10-08 Seiko Epson Corp Paper sheet detector of printer
JP2004352416A (en) * 2003-05-28 2004-12-16 Seiko Epson Corp Lever for detection of pass of recorded medium, and recording device

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