JP3632835B2 - Paper feeding device and image forming apparatus having the same - Google Patents

Paper feeding device and image forming apparatus having the same Download PDF

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JP3632835B2
JP3632835B2 JP2000243357A JP2000243357A JP3632835B2 JP 3632835 B2 JP3632835 B2 JP 3632835B2 JP 2000243357 A JP2000243357 A JP 2000243357A JP 2000243357 A JP2000243357 A JP 2000243357A JP 3632835 B2 JP3632835 B2 JP 3632835B2
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image forming
paper feeding
same
sheet feeding
pickup roller
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JP2002060066A (en
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真嗣 大石
英樹 後藤
俊彦 清家
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シャープ株式会社
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【0001】
【発明の属する技術分野】
本発明は、複写機、プリンタ、ファクシミリ装置などの画像形成装置に用いられる用紙給送のための給紙装置に関するものである。
【0002】
【従来の技術】
従来、複写機、プリンタ、ファクシミリ装置などの画像形成装置には、用紙搬送路に用紙を供給する給紙装置が設けられている。 Conventionally, image forming devices such as copiers, printers, and facsimile machines are provided with a paper feeding device that supplies paper to a paper transport path. 給紙装置では給紙トレイや給紙カセットなどからピックアップローラや給紙ローラによって上記用紙の供給を行うようになっているが、このような給紙ローラにはゴム体が用いられており、ゴム体が用紙との接触により摩耗するにつれて用紙の給送能力が低下するので、給紙ローラを適宜交換しなければならない。 In a paper feed device, the above paper is supplied from a paper feed tray or a paper feed cassette by a pickup roller or a paper feed roller. A rubber body is used for such a paper feed roller, and rubber is used. As the body wears due to contact with the paper, the paper feeding capacity decreases, so the paper feed rollers must be replaced as appropriate. 特開平5−69964号公報には、ピックアップローラを兼ねた給紙ローラを交換することができるように、給紙ローラとその周辺部材とが一体となった給紙ローラユニットが、装置本体および給紙ローラの駆動軸に対して着脱可能に設けられた構成の給紙装置が開示されている。 In Japanese Patent Application Laid-Open No. 5-69964, a paper feed roller unit in which a paper feed roller and its peripheral members are integrated is described as an apparatus main body and a feed roller unit so that a paper feed roller that also serves as a pickup roller can be replaced. A paper feeding device having a configuration that is detachably provided with respect to a drive shaft of a paper roller is disclosed.
【0003】 0003
【発明が解決しようとする課題】 [Problems to be Solved by the Invention]
しかしながら、従来の給紙装置の構成では、上記公報に開示されているように、給紙ローラの交換を給紙ローラユニットごと交換することによって行っているため、給紙ローラ以外の交換不要な部品まで交換する分、交換にかかるコストが高くなっていた。 However, in the conventional configuration of the paper feed device, as disclosed in the above publication, the paper feed rollers are replaced together with the paper feed roller units, so that parts other than the paper feed rollers do not need to be replaced. The cost of replacement was high because of the replacement.
【0004】 0004
本発明は、上記従来の問題点に鑑みなされたものであり、その目的は、給紙ローラの交換にかかるコストを低く抑えることのできる給紙装置を提供することにある。 The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a paper feeding device capable of reducing the cost of replacing a paper feeding roller.
【0005】 0005
【課題を解決するための手段】 [Means for solving problems]
本発明の給紙装置は、上記課題を解決するために、用紙を収納する用紙収納部と、上記用紙収納部の用紙を給紙する給紙ローラと、給紙時に上記給紙ローラを回転駆動する給紙ローラ駆動部とを有する給紙装置において、上記給紙ローラが単独で着脱可能であり、上記給紙ローラの回転軸は、上記給紙ローラに対して上記給紙ローラ駆動部からの回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっており、上記給紙ローラが上記非支持部の開放端を介して上記回転軸に着脱可能に設けられ、上記用紙収納部から用紙を取り出すピックアップローラと、上記給紙ローラが着脱可能であって上記回転軸に取り付けられる給紙ローラ保持部材と、上記ピックアップローラを保持するとともに上記給紙ローラ保持部材と着脱可能に設けられたピックアップローラ保持部材とをさらに有し、上記給紙ローラを保持して上記回転軸に取り付けられた上記給紙ローラ保持部材に、上記ピックアップローラを保持したピックアップローラ保持部材が取り付けられてなるローラユニットの状態で、上記ピックアップローラに上記給紙ローラ駆動部から回転駆動力が伝達され、上記給紙ローラは上記ピックアップローラによって取り出された用紙を下流側へ供給することを特徴としている。 In order to solve the above problems, the paper feed device of the present invention rotates a paper storage unit for storing paper, a paper feed roller for feeding paper in the paper storage unit, and a paper feed roller during paper feeding. in the sheet feeding apparatus having a sheet feeding roller driving unit which, Ri removable der the paper feeding roller alone, the axis of rotation of the paper feed roller from the feed roller drive unit with respect to the paper feed roller The side opposite to the side to which the rotational driving force is transmitted is a non-supporting portion that is not supported by the fixed object, and the paper feed roller is detachably provided on the rotating shaft via the open end of the non-supporting portion. A pickup roller that takes out paper from the paper storage unit, a paper feed roller holding member that is detachable and attached to the rotating shaft, and a paper feed roller holding member that holds the pickup roller and is attached to and detached from the paper feed roller holding member. A pickup roller holding member holding the pickup roller is attached to the paper feed roller holding member which further has a pickup roller holding member provided as possible and which holds the paper feed roller and is attached to the rotating shaft. In the state of the roller unit, the rotary driving force is transmitted from the paper feed roller drive unit to the pickup roller, and the paper feed roller supplies the paper taken out by the pickup roller to the downstream side. There is.
【0006】 0006
上記の発明によれば、給紙ローラの交換に際して給紙ローラ自体を交換することができるので、交換にかかるコストを低く抑えることのできる給紙装置を提供することができる。 According to the above invention, since the paper feed roller itself can be replaced when the paper feed roller is replaced, it is possible to provide a paper feed device capable of reducing the cost of replacement.
【0008】 0008
また、上記の発明によれば、給紙ローラの両端側に延びる回転軸は、給紙ローラ駆動部から回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっている、すなわち、回転軸は回転駆動力が伝達される側のみで支持されている。 Further , according to the above invention, the rotating shaft extending to both ends of the paper feed roller is a non-supporting portion on which the side opposite to the side where the rotational driving force is transmitted from the paper feed roller driving unit is not supported by the fixed object. That is, the rotating shaft is supported only on the side to which the rotational driving force is transmitted. そして、給紙ローラは上記非支持部の開放端を介して回転軸に着脱可能に設けられている。 The paper feed roller is detachably provided on the rotating shaft via the open end of the non-support portion. 従って、給紙ローラの回転軸に対する着脱の際には、回転軸の非支持部の開放端から取り外しおよび取り付けを行うことができ、このときに回転軸を支持する固定物などによって着脱が阻害されることもない。 Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment or detachment is hindered by a fixed object that supports the rotating shaft. There is no such thing. この結果、給紙ローラを容易に交換することができる。 As a result, the paper feed roller can be easily replaced.
【0010】 0010.
さらに、上記の発明によれば、給紙ローラとピックアップローラとを備える場合に、給紙ローラを給紙ローラ保持部材に対して、またピックアップローラをピックアップローラ保持部材に対して着脱可能とする。 Further, according to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the pickup roller holding member. そして、給紙ローラの回転軸に取り付ける給紙ローラ保持部材に対し、さらにピックアップローラ保持部材を着脱可能とする。 Then, the pickup roller holding member can be further attached to and detached from the paper feeding roller holding member attached to the rotating shaft of the paper feeding roller. 給紙ローラを保持して回転軸に取り付けた状態の給紙ローラ保持部材に、ピックアップローラを保持したピックアップローラ保持部材を取り付けた状態でローラユニットを構成し、このローラユニットの状態でピックアップローラに給紙ローラ駆動部から回転駆動力を伝達して、用紙収納部から用紙を取り出し、給紙ローラでその用紙を下流側へ供給する。 A roller unit is configured with the pickup roller holding member holding the pickup roller attached to the paper feed roller holding member holding the paper feed roller and attached to the rotating shaft, and the pickup roller is in the state of this roller unit. The rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied to the downstream side by the paper feed roller.
【0011】 0011
給紙ローラを交換する際には、ピックアップローラ保持部材を給紙ローラ保持部材から取り外すなどしておき、給紙ローラを給紙ローラ保持部材と回転軸とから取り外し、新しい給紙ローラをその逆の手順で装着すればよい。 When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and vice versa. You can install it according to the procedure in. 従って、ピックアップローラを備える場合に、給紙ローラとの組み合わせからなる簡単な構成のユニットを形成しながら、給紙ローラの交換にかかるコストを低く抑えることができる。 Therefore, when the pickup roller is provided, it is possible to keep the cost of replacing the paper feed roller low while forming a unit having a simple structure in combination with the paper feed roller.
【0012】 [0012]
さらに本発明の給紙装置は、上記課題を解決するために、上記ピックアップローラは上記ピックアップローラ保持部材に着脱可能であることを特徴としている。 Further, the paper feeding device of the present invention is characterized in that the pickup roller can be attached to and detached from the pickup roller holding member in order to solve the above problems.
【0013】 0013
上記の発明によれば、ピックアップローラはピックアップローラ保持部材に着脱可能であるので、給紙ローラとともに摩耗するピックアップローラをも交換することができる。 According to the above invention, since the pickup roller is detachable from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can be replaced.
【0014】 0014.
さらに本発明の給紙装置は、上記課題を解決するために、上記ローラユニットが上記回転軸の回りに回動可能であることを特徴としている。 Further, the paper feeding device of the present invention is characterized in that the roller unit can rotate around the rotation axis in order to solve the above problems.
【0015】 0015.
上記の発明によれば、給紙ローラの交換に際し、給紙装置の上方に設けられていることが多い画像形成ユニットを取り外した状態で、該画像形成ユニットが設けられていた空間にピックアップローラ側が移動するようにローラユニットを回動させれば、交換作業を容易に行うことができる。 According to the above invention, when the paper feed roller is replaced, the pickup roller side is placed in the space where the image forming unit is provided in a state where the image forming unit, which is often provided above the paper feeding device, is removed. If the roller unit is rotated so as to move, the replacement work can be easily performed. また、ピックアップローラによって用紙収納部から用紙を取り出すときにのみピックアップローラを用紙収納部の用紙に接触するように移動させることができる。 Further, the pickup roller can be moved so as to come into contact with the paper in the paper storage unit only when the paper is taken out from the paper storage unit by the pickup roller.
本発明の画像形成装置は、上記課題を解決するために、上記した本発明の給紙装置を備えたことを特徴としている。 The image forming apparatus of the present invention is characterized by including the above-mentioned paper feeding device of the present invention in order to solve the above-mentioned problems.
【0016】 0016.
【発明の実施の形態】 BEST MODE FOR CARRYING OUT THE INVENTION
本発明の給紙装置を具現する実施の形態について、図1ないし図11に基づいて説明すれば以下の通りである。 An embodiment of the paper feeding device of the present invention will be described below with reference to FIGS. 1 to 11.
【0017】 [0017]
図11に、本実施の形態に係る給紙装置が搭載される画像形成装置としての複写機1の一構成例について、その正面断面図を示す。 FIG. 11 shows a front sectional view of a configuration example of the copying machine 1 as an image forming device on which the paper feeding device according to the present embodiment is mounted. 複写機1は、原稿カバー2、原稿台3、スキャナ部4、画像形成部5、給紙装置6、給紙搬送部7、排紙搬送部8、および排紙トレイ9を有している。 The copying machine 1 includes a document cover 2, a document stand 3, a scanner unit 4, an image forming unit 5, a paper feeding device 6, a paper feeding transport unit 7, a paper discharge transport unit 8, and a paper output tray 9.
【0018】 0018
原稿台3は複写機1の本体の上面に配置された透明なガラス体であり、さらにその上に原稿カバー2が設けられている。 The platen 3 is a transparent glass body arranged on the upper surface of the main body of the copying machine 1, and a document cover 2 is provided on the transparent glass body. スキャナ部4は原稿台3の下方の複写機1の本体内部に配置されており、露光ランプおよび第1ミラーを備える露光ユニット4a、第2ミラーおよび第3ミラーを備えるミラーユニット4b、結像レンズ4c、および光電変換素子(以下CCDと称する)4dを有している。 The scanner unit 4 is arranged inside the main body of the copier 1 below the platen 3, and includes an exposure unit 4a including an exposure lamp and a first mirror, a mirror unit 4b including a second mirror and a third mirror, and an imaging lens. It has 4c and a photoelectric conversion element (hereinafter referred to as CCD) 4d. 露光ユニット4aは原稿台3の下面側で水平方向に往復移動を行い、原稿台3の上面に載置された原稿の画像を露光ランプから照射された光によって露光走査する。 The exposure unit 4a reciprocates in the horizontal direction on the lower surface side of the platen 3, and exposes and scans the image of the document placed on the upper surface of the platen 3 with the light emitted from the exposure lamp. 露光ランプの光照射による原稿の画像面からの反射光は第1ミラーによってミラーユニット4bに導かれる。 The reflected light from the image surface of the document due to the light irradiation of the exposure lamp is guided to the mirror unit 4b by the first mirror. ミラーユニット4bは露光ユニット4aに対して所定の速度で往復移動を行い、露光ユニット4aの第1ミラーで反射された光を後続の光学系に導く。 The mirror unit 4b reciprocates with respect to the exposure unit 4a at a predetermined speed, and guides the light reflected by the first mirror of the exposure unit 4a to the subsequent optical system. 結像レンズ4cは、ミラーユニット4bからの光をCCD4dの受光面に結像し、CCD4dは受光面における受光量に応じた信号を出力する。 The imaging lens 4c forms an image of the light from the mirror unit 4b on the light receiving surface of the CCD 4d, and the CCD 4d outputs a signal corresponding to the amount of light received on the light receiving surface. このCCD4dの出力信号は、デジタルデータに変換された後に図示しない画像処理部において所定の処理が施され、画像データとして出力される。 After being converted into digital data, the output signal of the CCD4d is subjected to predetermined processing in an image processing unit (not shown) and output as image data.
【0019】 0019
スキャナ部4の下方の一部は排紙のための空間となっており、画像形成部5、給紙装置6、給紙搬送部7、および排紙搬送部8は、上記排紙用の空間を除いてスキャナ部4の下方に設けられた複写機1の本体内部に配置されている。 A part below the scanner unit 4 is a space for discharging paper, and the image forming unit 5, the paper feeding device 6, the paper feeding transport unit 7, and the paper discharging transport unit 8 are spaces for discharging the paper. Is arranged inside the main body of the copying machine 1 provided below the scanner unit 4. 画像形成部5の中央部には、感光体ドラム5aが図中矢印I方向に回転自在に支持された状態に設けられている。 A photoconductor drum 5a is provided at the center of the image forming portion 5 in a state of being rotatably supported in the direction of arrow I in the drawing. 感光体ドラム5aの周囲には、帯電器5b、画像書き込みユニット5c、現像槽5d、転写器5eおよびクリーナー5fが配置されている。 A charger 5b, an image writing unit 5c, a developing tank 5d, a transfer device 5e, and a cleaner 5f are arranged around the photoconductor drum 5a.
【0020】 0020
また、給紙装置6は複写機1の本体最下部に設けられており、用紙Pを収納した用紙収納部としての給紙カセット6a、給紙カセット6aから用紙Pを取り出すピックアップローラ(後述)とそれを下流側へ供給する給紙ローラ(後述)とを備えたピックアップユニット6b、およびピックアップユニット6bの給紙ローラを駆動する給紙ローラ駆動部(後述)を有している。 Further, the paper feed device 6 is provided at the lowermost part of the main body of the copying machine 1, and includes a paper feed cassette 6a as a paper storage unit for storing the paper P and a pickup roller (described later) for taking out the paper P from the paper feed cassette 6a. It has a pickup unit 6b provided with a paper feed roller (described later) that supplies it to the downstream side, and a paper feed roller drive unit (described later) that drives the paper feed roller of the pickup unit 6b. 給紙搬送部7は給紙装置6から画像形成部5の転写器5e直前の位置に向かう搬送路7aおよび搬送路7a上に設けられたレジストローラ7bを備えている。 The paper feed transport unit 7 includes a transport path 7a from the paper feed device 6 to a position immediately before the transfer device 5e of the image forming unit 5 and a resist roller 7b provided on the transport path 7a. 排紙搬送部8は、画像形成部5の転写器5e以降から画像形成部5の上方を迂回して前記排紙用の空間に向かう搬送路8a、搬送路8a上に設けられた定着ローラ8b、および搬送路8aの最下流側に設けられた排紙ローラ8cを備えている。 The paper discharge transport unit 8 bypasses the upper part of the image forming unit 5 from the transfer device 5e and later of the image forming unit 5 and heads for the paper discharge space, and the fixing rollers 8b provided on the transport paths 8a and 8a. , And a paper ejection roller 8c provided on the most downstream side of the transport path 8a. 搬送路8aの最下流側は、前記排紙用の空間と複写機1の本体との境界部分であり、排紙トレイ9は排紙ローラ8cから排出された用紙Pを受けるように、この排紙用空間の最下部に設けられている。 The most downstream side of the transport path 8a is a boundary portion between the paper ejection space and the main body of the copying machine 1, and the paper ejection tray 9 is ejected so as to receive the paper P ejected from the paper ejection roller 8c. It is provided at the bottom of the paper space.
【0021】 0021.
画像形成時には、画像形成部5において矢印I方向に回転する感光体ドラム5aの表面に対して、帯電器5bが単一極性の電荷を均一に付与した後、画像書き込みユニット5cが画像処理部から出力された画像データに基づいて変調した画像光を照射し、感光体ドラム5aの表面に光導電作用による静電潜像を作成する。 At the time of image formation, after the charger 5b uniformly applies a unipolar charge to the surface of the photoconductor drum 5a rotating in the direction of arrow I in the image forming unit 5, the image writing unit 5c is transferred from the image processing unit. By irradiating the image light modulated based on the output image data, an electrostatic latent image by photoconductive action is created on the surface of the photoconductor drum 5a. 現像槽5dは、感光体ドラム5aの表面に現像剤を供給し、静電潜像を現像剤画像に顕像化する。 The developing tank 5d supplies a developing agent to the surface of the photoconductor drum 5a, and visualizes an electrostatic latent image into a developing agent image. また、給紙装置6においては、感光体ドラム5aの回転に先立ってピックアップユニット6bのピックアップローラの回転により給紙カセット6aの用紙Pが1枚ずつ取り出される。 Further, in the paper feed device 6, the paper P of the paper feed cassette 6a is taken out one by one by the rotation of the pickup roller of the pickup unit 6b prior to the rotation of the photoconductor drum 5a. 取り出された用紙Pは、ピックアップユニット6bの給紙ローラと給紙ローラに圧接された用紙さばきユニット(後述)とにより、1枚の場合にはそのまま、複数枚の場合には1枚ずつに分離され、給紙搬送部7の搬送路7aに給紙されてレジストローラ7bに送られる。 The ejected paper P is separated into one sheet as it is in the case of one sheet and one sheet in the case of a plurality of sheets by the paper feeding roller of the pickup unit 6b and the paper handling unit (described later) pressed against the paper feeding roller. Then, the paper is fed into the transport path 7a of the paper feed transport unit 7 and sent to the registration roller 7b.
【0022】 0022.
レジストローラ7bに到達した用紙Pは前端部がレジストローラ7bに当接した状態で一旦停止し、レジストローラ7bは、用紙Pの前端部が転写器5eの位置で感光体ドラム5aの表面に担持された現像剤画像の前端に対向するタイミングとなるように回転を開始し、用紙Pを転写器5eに導く。 The paper P that has reached the resist roller 7b is temporarily stopped with the front end portion in contact with the resist roller 7b, and the resist roller 7b is supported on the surface of the photoconductor drum 5a at the position of the transfer device 5e by the front end portion of the paper P. The rotation is started so as to face the front end of the developed developer image, and the paper P is guided to the transfer device 5e. 転写器5eは、感光体ドラム5aに担持された現像剤画像を用紙Pの表面に転写する。 The transfer device 5e transfers the developer image supported on the photoconductor drum 5a to the surface of the paper P. 転写終了後、クリーナー5fは、感光体ドラム5aの表面に残留したトナーを除去する。 After the transfer is completed, the cleaner 5f removes the toner remaining on the surface of the photoconductor drum 5a. 現像剤画像が転写された用紙Pは排紙搬送部8の搬送路8aに導かれ、定着ローラ8bを通過する間に加熱および加圧されることにより、現像剤画像が溶融して記録紙の第1面(片面)に固着する。 The paper P on which the developer image is transferred is guided to the transport path 8a of the paper ejection transport unit 8 and heated and pressurized while passing through the fixing roller 8b, so that the developer image is melted and the recording paper It sticks to the first surface (one side). 第1面に現像剤画像が固着した用紙Pが、排紙ローラ8cの回転によって排紙トレイ9に排出されることで、ユーザに片面に画像形成された印刷物が提供される。 The paper P on which the developer image is fixed on the first surface is ejected to the output tray 9 by the rotation of the output roller 8c, so that the user is provided with a printed matter having an image formed on one side.
【0023】 [0023]
次に、上記の構成の複写機1に用いられる給紙装置6について詳細に説明する。 Next, the paper feeding device 6 used in the copying machine 1 having the above configuration will be described in detail. 図2に、給紙装置6のうち、ローラユニットとしてのピックアップユニット6bとその周辺部との構成を示す。 FIG. 2 shows the configuration of the pickup unit 6b as a roller unit and its peripheral portion in the paper feeding device 6. ピックアップユニット6bはピックアップローラ11および給紙ローラ12を有しており、ピックアップローラ11が給紙カセット6aに収納されている用紙Pの給紙方向先端部側の上方に位置するように、また給紙ローラ12が該用紙Pの給紙方向先端部よりも給紙下流側に位置するように配置されている。 The pickup unit 6b has a pickup roller 11 and a paper feed roller 12, so that the pickup roller 11 is located above the tip side of the paper P stored in the paper feed cassette 6a in the paper feed direction. The paper roller 12 is arranged so as to be located on the downstream side of the paper feed from the tip portion of the paper P in the paper feed direction. 給紙ローラ12は回転軸13を介して給紙ローラ駆動部としてのモータ14に連結されており、給紙時にモータ14によって回転駆動されるようになっている。 The paper feed roller 12 is connected to a motor 14 as a paper feed roller drive unit via a rotary shaft 13, and is rotationally driven by the motor 14 during paper feed. なお、同図ではモータ14が回転軸13に直結しているが、これに限らず、ギアを介して回転軸13と連結していても構わない。 In the figure, the motor 14 is directly connected to the rotating shaft 13, but the present invention is not limited to this, and the motor 14 may be connected to the rotating shaft 13 via a gear.
【0024】 0024
ピックアップローラ11は、給紙時に図3に示すように給紙カセット6aの最上層の用紙Pに接触することにより、給紙カセット6aから用紙Pを取り出す。 As shown in FIG. 3, the pickup roller 11 comes into contact with the paper P on the uppermost layer of the paper cassette 6a to take out the paper P from the paper cassette 6a. また、給紙ローラ12の下方には用紙さばきユニット15が設けられており、スプリング力によるさばき板の給紙ローラ12の下面への当接により、ピックアップローラ11が給紙カセット6aから複数の用紙P…を取り出した場合でも、これらを1枚ずつに分離して給紙搬送部7へ供給することができるようになっている。 Further, a paper handling unit 15 is provided below the paper feed roller 12, and the pickup roller 11 causes a plurality of papers from the paper feed cassette 6a due to the contact of the paper handling plate with the lower surface of the paper feed roller 12 by the spring force. Even when P ... Is taken out, these can be separated one by one and supplied to the paper feed transport unit 7.
【0025】 0025
図1にピックアップユニット6bの詳細な構成を示す。 FIG. 1 shows a detailed configuration of the pickup unit 6b. 同図(a)に示すように、ピックアップユニット6bにはピックアップローラ11を保持するピックアップローラ保持部材21と、給紙ローラ12を保持する給紙ローラ保持部材22とが設けられている。 As shown in FIG. 6A, the pickup unit 6b is provided with a pickup roller holding member 21 for holding the pickup roller 11 and a paper feed roller holding member 22 for holding the paper feed roller 12. ピックアップローラ11はギア17と一体となってピックアップローラ保持部材21に着脱可能となっており、給紙ローラ12は給紙ローラ保持部材22に着脱可能となっている。 The pickup roller 11 is integrated with the gear 17 and can be attached to and detached from the pickup roller holding member 21, and the paper feed roller 12 can be attached to and detached from the paper feed roller holding member 22. 給紙ローラ保持部材22は給紙ローラ12の回転軸13に取り付けられ、回転軸13に着脱可能であってもなくてもよいが、給紙ローラ12を保持して回転軸13に取り付けられた状態で、ピックアップローラ11を保持したピックアップローラ保持部材21がさらに着脱可能となっている。 The paper feed roller holding member 22 is attached to the rotary shaft 13 of the paper feed roller 12, and may or may not be detachable from the rotary shaft 13, but the paper feed roller 12 is held and attached to the rotary shaft 13. In this state, the pickup roller holding member 21 that holds the pickup roller 11 is further detachable.
【0026】 0026
回転軸13は、モータ14から回転駆動力が伝達される側は図示しない軸受けを介して固定物に支持されているが、給紙ローラ12が取り付けられた状態では、給紙ローラ12に対して回転駆動力が伝達される側と反対側が固定物に支持されない非支持部13aとなっている。 The rotary shaft 13 is supported by a fixed object via a bearing (not shown) on the side where the rotational driving force is transmitted from the motor 14, but when the paper feed roller 12 is attached, the rotary shaft 13 is supported by the paper feed roller 12. The side opposite to the side to which the rotational driving force is transmitted is the non-support portion 13a that is not supported by the fixed object. 同図(b)に示すようにこの非支持部13aは給紙ローラ12から僅かに突出する程度の長さに設けられており、同図(c)に示すように給紙ローラ12は給紙ローラ保持部材22から取り外されると非支持部13aの開放端13bを介して回転軸13から取り外されるようになっている。 As shown in FIG. 3B, the non-support portion 13a is provided with a length slightly protruding from the paper feed roller 12, and the paper feed roller 12 feeds paper as shown in FIG. When it is removed from the roller holding member 22, it is removed from the rotating shaft 13 via the open end 13b of the non-support portion 13a. 給紙ローラ12を回転軸13に取り付けるときは、開放端13bを介して回転軸13を給紙ローラ12の軸孔に通し、先に回転軸13に取り付けたギア19に給紙ローラ12を取り付ける。 When the paper feed roller 12 is attached to the rotary shaft 13, the rotary shaft 13 is passed through the shaft hole of the paper feed roller 12 via the open end 13b, and the paper feed roller 12 is attached to the gear 19 previously attached to the rotary shaft 13. .. このように、給紙装置6では給紙ローラ12が単独で着脱可能となっている。 As described above, in the paper feed device 6, the paper feed roller 12 can be attached and detached independently.
【0027】 [0027]
また、同図(b)に示すように、給紙ローラ保持部材22はピックアップローラ保持部材21が取り付けられるときにピックアップローラ11が給紙ローラ12に併設されるよう、回転軸13との連結部分である給紙ローラ12の保持側から回転軸13に直交する方向に突設したローラ保持板22aに、ピックアップローラ11の回転軸を受ける軸受けを備えている。 Further, as shown in FIG. 3B, the paper feed roller holding member 22 is connected to the rotating shaft 13 so that the pickup roller 11 is attached to the paper feed roller 12 when the pickup roller holding member 21 is attached. A roller holding plate 22a projecting from the holding side of the paper feed roller 12 in a direction orthogonal to the rotating shaft 13 is provided with a bearing for receiving the rotating shaft of the pickup roller 11. また、ローラ保持板22aには、ピックアップローラ11が取り付けられたときに給紙ローラ12のギア19とピックアップローラ11のギア17との間で両方に歯合してピックアップローラ11に回転駆動力を伝達するアイドルギア18が設けられている。 Further, when the pickup roller 11 is attached to the roller holding plate 22a, the gear 19 of the paper feed roller 12 and the gear 17 of the pickup roller 11 mesh with each other to apply a rotational driving force to the pickup roller 11. An idle gear 18 for transmission is provided. このローラ保持板22aは、取り付けられるピックアップローラ11を給紙ローラ12との間に挟むように、回転軸13と平行で開放端13bに向かう方向にさらに延設されている。 The roller holding plate 22a is further extended in the direction toward the open end 13b in parallel with the rotating shaft 13 so as to sandwich the pickup roller 11 to be attached with the paper feeding roller 12. そして、この延設方向先端部の回転軸13側と反対側の面には、ピックアップローラ保持部材21を取り付けるための係止爪22bが設けられている。 A locking claw 22b for attaching the pickup roller holding member 21 is provided on the surface of the tip end portion in the extension direction opposite to the rotation shaft 13 side. また、上記延設方向先端部にはピックアップローラ保持部材21の後述する突起21cが嵌合する嵌合孔22cが設けられている。 Further, a fitting hole 22c into which a protrusion 21c described later of the pickup roller holding member 21 is fitted is provided at the tip end portion in the extension direction.
【0028】 [0028]
ピックアップローラ保持部材21は、このような給紙ローラ保持部材22への取り付け時にローラ保持板22aの給紙ローラ12保持側部分に平行となるローラ保持板21aを備えている。 The pickup roller holding member 21 includes a roller holding plate 21a that is parallel to the paper feeding roller 12 holding side portion of the roller holding plate 22a when attached to the paper feeding roller holding member 22. ローラ保持板21aには、ピックアップローラ11の回転軸の一方の端部付近(給紙ローラ保持部材22側と反対側)が接続されている。 The roller holding plate 21a is connected to the vicinity of one end of the rotation shaft of the pickup roller 11 (the side opposite to the paper feed roller holding member 22 side). また、ローラ保持板21aには、上記取り付け時にローラ保持板22aの係止爪22bに係止される係止爪21bと、嵌合孔22cに嵌合される突起21cとが設けられている。 Further, the roller holding plate 21a is provided with a locking claw 21b that is locked to the locking claw 22b of the roller holding plate 22a at the time of mounting, and a protrusion 21c that is fitted into the fitting hole 22c.
【0029】 [0029]
さらに、ローラ保持板21aには給紙ローラ12の回転軸13が挿入される軸孔21dが設けられており、ピックアップローラ保持部材21は軸受けを介して回転軸13にも取り付けられる。 Further, the roller holding plate 21a is provided with a shaft hole 21d into which the rotating shaft 13 of the paper feed roller 12 is inserted, and the pickup roller holding member 21 is also attached to the rotating shaft 13 via a bearing. これにより、ピックアップユニット6b全体が安定して回転軸13に取り付けられるようになっている。 As a result, the entire pickup unit 6b can be stably attached to the rotating shaft 13. さらに、ローラ保持板21aには、回転軸13が挿入された状態で給紙ローラ12の下面側とともに供給する用紙Pを上方から押さえる用紙押さえ部材21eが、回転軸13の方向に突設されている。 Further, in the roller holding plate 21a, a paper holding member 21e that holds the paper P to be supplied together with the lower surface side of the paper feed roller 12 with the rotating shaft 13 inserted is projected in the direction of the rotating shaft 13. There is. この用紙押さえ部材21eは、給紙ローラ12の下面側を略そのまま回転軸13の開口端13bの方向に延長した湾曲面をなしている。 The paper holding member 21e has a curved surface in which the lower surface side of the paper feed roller 12 extends in the direction of the opening end 13b of the rotating shaft 13 as it is.
【0030】 [0030]
上記の構成のピックアップユニット6bは、回転軸13の回りに回動可能となっており、図2に示すように、用紙Pの給紙を行わない待機時にはピックアップローラ11が給紙カセット6aの用紙Pから離れるように(矢印D方向に)回動する。 The pickup unit 6b having the above configuration is rotatable around the rotation shaft 13, and as shown in FIG. 2, the pickup roller 11 is the paper in the paper feed cassette 6a during standby when the paper P is not fed. Rotate away from P (in the direction of arrow D). また、図3に示すように、用紙Pの給紙を行うときにはピックアップローラ11が給紙カセット6aの用紙Pに接触するように(矢印C方向に)回動する。 Further, as shown in FIG. 3, when the paper P is fed, the pickup roller 11 rotates (in the direction of arrow C) so as to come into contact with the paper P of the paper feed cassette 6a. 以下に、ピックアップユニット6bの回動機構について説明する。 The rotation mechanism of the pickup unit 6b will be described below.
【0031】 0031
図4に示すように、給紙ローラ保持部材22において、ローラ保持板22aには、ピックアップローラ11の装着部辺りの上方に、給紙ローラ12の回転軸13とピックアップローラ11の回転軸とで作る面と略平行な平板で、回転軸13に沿って駆動力伝達側に突出する突出板22dが設けられている。 As shown in FIG. 4, in the paper feed roller holding member 22, the roller holding plate 22a has a rotation shaft 13 of the paper feed roller 12 and a rotation shaft of the pickup roller 11 above the mounting portion of the pickup roller 11. A flat plate substantially parallel to the surface to be made, provided with a protruding plate 22d protruding toward the driving force transmission side along the rotation shaft 13. また、ピックアップユニット6bの外部に略への字状のアーム31が設けられており、アーム31の長辺側の先端が上記突出板22dの下面に当接するようになっている。 Further, a substantially O-shaped arm 31 is provided on the outside of the pickup unit 6b, and the tip of the arm 31 on the long side side comes into contact with the lower surface of the protruding plate 22d. アーム31は長辺と短辺との交点を通る軸32の回りに回動可能となっており、短辺側は、軸32の回りの回動量を規制するために設けられたソレノイド33のプランジャー33a(図5参照)と接続されている。 The arm 31 is rotatable around a shaft 32 passing through the intersection of the long side and the short side, and the short side is a plan of a solenoid 33 provided to regulate the amount of rotation around the shaft 32. It is connected to the jar 33a (see FIG. 5).
【0032】 [0032]
図4を回転軸13に直交する方向の側面から見た図を図5に示す。 FIG. 5 shows a view of FIG. 4 from the side surface in the direction orthogonal to the rotation axis 13. 同図(a)はピックアップユニット6bが図3のように給紙時の状態にある場合を表し、ソレノイド33のプランジャー33aがソレノイド33の内部に向かって引き込まれることによってアーム31の長辺側が下降している。 FIG. 3A shows a case where the pickup unit 6b is in the state of being fed as shown in FIG. 3, and the plunger 33a of the solenoid 33 is pulled toward the inside of the solenoid 33 so that the long side side of the arm 31 is moved. It is descending. この状態では、破線で示すようにアーム31が若干移動することができるような遊びが生じるが、同図に示すようにアーム31の長辺は圧縮スプリング34によって上方に付勢されているため、この状態のプランジャー33aの位置で許容される最大限の高さまで持ち上げられている。 In this state, as shown by the broken line, play occurs so that the arm 31 can move slightly, but as shown in the figure, the long side of the arm 31 is urged upward by the compression spring 34. The position of the plunger 33a in this state is lifted to the maximum allowable height. ピックアップユニット6bのピックアップローラ11側は、自重により図中矢印C方向に移動して、上記位置にあるアーム31の長辺上に下降した状態となって用紙Pと接触するので、用紙Pを給紙カセット6から取り出すことができる。 The pickup roller 11 side of the pickup unit 6b moves in the direction of arrow C in the drawing due to its own weight, descends on the long side of the arm 31 at the above position, and comes into contact with the paper P. Therefore, the paper P is supplied. It can be taken out from the paper cassette 6.
【0033】 0033
これに対し、同図(b)はピックアップユニット6bが図2のように待機時の状態にある場合を表し、ソレノイド33のプランジャー33aがソレノイド33の外部に向かって飛び出すことによって、圧縮スプリング34の付勢力でアーム31の長辺側が図中矢印D方向に上昇している。 On the other hand, FIG. 2B shows a case where the pickup unit 6b is in the standby state as shown in FIG. 2, and the plunger 33a of the solenoid 33 protrudes toward the outside of the solenoid 33 to cause the compression spring 34. The long side of the arm 31 is raised in the direction of arrow D in the figure by the urging force of. 上昇限度はアーム31の短辺が回動可能な範囲で決定される。 The ascending limit is determined within the range in which the short side of the arm 31 can rotate. このように、ピックアップユニット6bによれば、用紙Pの供給を行うときにピックアップローラ11を給紙カセット6aの用紙Pに接触させ、待機時にピックアップローラ11を給紙カセット6aの用紙Pから離間させることができる。 As described above, according to the pickup unit 6b, the pickup roller 11 is brought into contact with the paper P of the paper feed cassette 6a when the paper P is supplied, and the pickup roller 11 is separated from the paper P of the paper feed cassette 6a during standby. be able to.
【0034】 0034
さらにピックアップユニット6bは、図6に示すように、ピックアップローラ11と給紙ローラ12とが用紙P面に対して略直交する方向に並ぶ状態となるまで、手動によりまたは自動で回動させることができる。 Further, as shown in FIG. 6, the pickup unit 6b can be manually or automatically rotated until the pickup roller 11 and the paper feed roller 12 are aligned in a direction substantially orthogonal to the paper P surface. it can. 回動角はこれに限らず任意でよいが、同図に示す状態に回動させることができれば、給紙ローラ12の交換に際し、給紙装置6の上方に設けられていることが多い前述した画像形成部5を構成するような画像形成ユニットを取り外すことにより、該画像形成ユニットが設けられていた空間で交換作業を行うことができ、作業が容易になる。 The rotation angle is not limited to this, and may be arbitrary, but if it can be rotated to the state shown in the figure, it is often provided above the paper feed device 6 when the paper feed roller 12 is replaced. By removing the image forming unit that constitutes the image forming unit 5, the replacement work can be performed in the space where the image forming unit is provided, and the work becomes easy.
【0035】 0035.
このときのピックアップユニット6bの回動動作について以下に説明する。 The rotational operation of the pickup unit 6b at this time will be described below. 図7に示すように、給紙ローラ保持部材22において、ローラ保持板22aには係止爪22bに隣接して、給紙ローラ12の回転軸13とピックアップローラ11の回転軸とで作る面と略平行な平板で、回転軸13と直交して遠ざかる方向に突出する突出板22eが設けられている。 As shown in FIG. 7, in the paper feed roller holding member 22, the roller holding plate 22a has a surface formed by the rotation shaft 13 of the paper feed roller 12 and the rotation shaft of the pickup roller 11 adjacent to the locking claw 22b. A substantially parallel flat plate is provided with a protruding plate 22e that projects in a direction orthogonal to the rotation axis 13 and away from the rotating shaft 13. そして、ピックアップユニット6bの外部には、固定物から延設された第1フック41が設けられており、ピックアップユニット6bの回動途上で上記突出板22eの上面と当接するようになっている。 A first hook 41 extending from a fixed object is provided on the outside of the pickup unit 6b so as to come into contact with the upper surface of the protruding plate 22e during the rotation of the pickup unit 6b. また、ローラ保持板22aのローラ保持側部分には、ピックアップユニット6bの回動終端位置を決めるためにピックアップユニット6bの外部に設けられた第2フック42が嵌挿されるフック孔22fが設けられている。 Further, the roller holding side portion of the roller holding plate 22a is provided with a hook hole 22f into which a second hook 42 provided outside the pickup unit 6b is fitted in order to determine the rotation end position of the pickup unit 6b. There is. なお、同図ではフック孔22fの位置が分かりやすくなるように、図1に示したギア17・19およびアイドルギア18の図示を省略してある。 In the figure, the gears 17 and 19 and the idle gear 18 shown in FIG. 1 are not shown so that the positions of the hook holes 22f can be easily understood.
【0036】 0036
図8に、第1フック41とピックアップユニット6bとの位置関係を示す。 FIG. 8 shows the positional relationship between the first hook 41 and the pickup unit 6b. 同図(a)は複写機1を使用するときの状態を示すものであり、ピックアップユニット6bを回転軸13の回りに回動させてピックアップローラ11側を持ち上げようとすると、ピックアップユニット6bの突出板22eが第1フック41に押さえられて、回動範囲が図中矢印C−Eの範囲に規制される。 FIG. 3A shows a state when the copying machine 1 is used, and when the pickup unit 6b is rotated around the rotation shaft 13 to lift the pickup roller 11 side, the pickup unit 6b protrudes. The plate 22e is pressed by the first hook 41, and the rotation range is restricted to the range of arrows CE in the figure. 該矢印C−Eの範囲に、図2の待機状態と図3の給紙状態との間の回動範囲(矢印C−Dの範囲)が含まれる。 The range of the arrows CE includes a rotation range (range of arrows CD) between the standby state of FIG. 2 and the paper feed state of FIG. 同図(b)は給紙ローラ12の交換時の状態を示すものであり、ピックアップユニット6bの上方にある画像形成ユニットを複写機1から取り外した後、第1フック41を図中矢印Fの方向に移動させて、ピックアップユニット6bを前記矢印C−Eの範囲を越えて図中矢印Gの方向に回動させる。 FIG. 3B shows a state when the paper feed roller 12 is replaced. After removing the image forming unit above the pickup unit 6b from the copying machine 1, the first hook 41 is attached to the arrow F in the drawing. By moving the pickup unit 6b in the direction, the pickup unit 6b is rotated in the direction of the arrow G in the drawing beyond the range of the arrows CE.
【0037】 0037
また、図9に第2フック42とピックアップユニット6bとの位置関係を示す。 Further, FIG. 9 shows the positional relationship between the second hook 42 and the pickup unit 6b. 同図(a)は図8(a)の状態に相当し、ピックアップユニット6bを図8(b)のように矢印Gの方向に回動させると、図9(b)に示すようにピックアップユニット6bのフック孔22fに第2フック42が嵌挿されて、ピックアップユニット6bが給紙ローラ12の交換作業用の位置に固定される。 FIG. 8A corresponds to the state of FIG. 8A, and when the pickup unit 6b is rotated in the direction of the arrow G as shown in FIG. 8B, the pickup unit is shown in FIG. 9B. The second hook 42 is fitted into the hook hole 22f of 6b, and the pickup unit 6b is fixed at a position for replacement work of the paper feed roller 12. また、同図(c)・(d)はそれぞれ、同図(a)・(b)をピックアップユニット6bの給紙方向の後方から見た図である。 Further, FIGS. (C) and (d) are views of FIGS. (A) and (b) viewed from the rear of the pickup unit 6b in the paper feeding direction, respectively.
【0038】 [0038]
図9(b)・(d)の状態から、給紙ローラ12の交換作業が開始される。 The replacement work of the paper feed roller 12 is started from the state of FIGS. 9B and 9D. まず図1(a)に示すように、ピックアップローラ保持部材21の係止爪21bを図中矢印Aの方向に移動させて給紙ローラ保持部材22の係止爪22bとの係止を解く。 First, as shown in FIG. 1A, the locking claw 21b of the pickup roller holding member 21 is moved in the direction of the arrow A in the drawing to release the locking claw 22b of the paper feed roller holding member 22. 次いで、同図(b)に示すようにピックアップローラ保持部材21全体を図中矢印Bの方向に引き出し、軸孔21dを開放端13bを介して回転軸13から抜いてピックアップローラ保持部材21を取り外す。 Next, as shown in FIG. 3B, the entire pickup roller holding member 21 is pulled out in the direction of arrow B in the drawing, the shaft hole 21d is pulled out from the rotating shaft 13 via the open end 13b, and the pickup roller holding member 21 is removed. .. そして、同図(c)に示すように給紙ローラ12を給紙ローラ保持部材22から取り外し、図中矢印Bの方向に引き出し、開放端13bを介して回転軸13から取り外す。 Then, as shown in FIG. 3C, the paper feed roller 12 is removed from the paper feed roller holding member 22, pulled out in the direction of the arrow B in the figure, and removed from the rotating shaft 13 via the open end 13b.
【0039】 [0039]
このように、本実施の形態の給紙装置6によれば、給紙ローラ12が単独で着脱可能である。 As described above, according to the paper feeding device 6 of the present embodiment, the paper feeding roller 12 can be attached and detached independently. 従って、給紙ローラ12の交換に際して給紙ローラ12自体を交換することができるので、交換にかかるコストを低く抑えることができる。 Therefore, when the paper feed roller 12 is replaced, the paper feed roller 12 itself can be replaced, so that the replacement cost can be kept low. また、給紙ローラ12の回転軸13に対する着脱の際には、回転軸13の非支持部13aの開放端13bから取り外しおよび取り付けを行うことができ、このときに回転軸13を支持する固定物などによって着脱が阻害されることもない。 Further, when the paper feed roller 12 is attached to or detached from the rotating shaft 13, it can be removed and attached from the open end 13b of the non-supporting portion 13a of the rotating shaft 13, and at this time, a fixed object that supports the rotating shaft 13 Detachment is not hindered by such factors. この結果、給紙ローラ12を容易に交換することができる。 As a result, the paper feed roller 12 can be easily replaced.
【0040】 0040
さらに、給紙ローラ12を交換する際には、ピックアップローラ保持部材21を給紙ローラ保持部材22から取り外しておき、給紙ローラ12を給紙ローラ保持部材22と回転軸13とから取り外し、新しい給紙ローラ12をその逆の手順で装着すればよい。 Further, when replacing the paper feed roller 12, the pickup roller holding member 21 is removed from the paper feed roller holding member 22, the paper feed roller 12 is removed from the paper feed roller holding member 22 and the rotating shaft 13, and a new one is used. The paper feed roller 12 may be mounted in the reverse procedure. 従って、ピックアップローラ11を備える場合に、給紙ローラ12との組み合わせからなる簡単な構成のユニットを形成しながら、給紙ローラ12の交換にかかるコストを低く抑えることができる。 Therefore, when the pickup roller 11 is provided, the cost for replacing the paper feed roller 12 can be kept low while forming a unit having a simple structure in combination with the paper feed roller 12.
【0041】 [0041]
さらに、図10に示すように、ピックアップローラ11の一端の回転軸周りに該回転軸と平行な嵌挿部材11aを、またピックアップローラ保持部材21のローラ保持板21aにピックアップローラ取り付け孔21eを設け、ピックアップローラ11をピックアップローラ保持部材21に着脱可能とすることもできる。 Further, as shown in FIG. 10, a fitting member 11a parallel to the rotation axis is provided around the rotation axis at one end of the pickup roller 11, and a pickup roller mounting hole 21e is provided in the roller holding plate 21a of the pickup roller holding member 21. The pickup roller 11 can be attached to and detached from the pickup roller holding member 21. この場合、図1(b)に示すように取り外したピックアップローラ保持部材21から、図10中の矢印Hの方向にピックアップローラ11を取り外し、新たなピックアップローラ11を取り付けることができる。 In this case, the pickup roller 11 can be removed from the removed pickup roller holding member 21 as shown in FIG. 1B in the direction of the arrow H in FIG. 10, and a new pickup roller 11 can be attached. 従って、給紙ローラ12とともに摩耗するピックアップローラ11をも交換することができる。 Therefore, the pickup roller 11 that wears together with the paper feed roller 12 can be replaced.
本発明の給紙装置は、上記課題を解決するために、用紙を収納する用紙収納部と、上記用紙収納部の用紙を給紙する給紙ローラと、給紙時に上記給紙ローラを回転駆動する給紙ローラ駆動部とを有する給紙装置において、上記給紙ローラが単独で着脱可能であることを特徴としている。 In order to solve the above problems, the paper feed device of the present invention rotates a paper storage unit for storing paper, a paper feed roller for feeding paper in the paper storage unit, and a paper feed roller during paper feeding. The paper feed device including the paper feed roller drive unit is characterized in that the paper feed roller can be attached and detached independently.
上記の発明によれば、給紙ローラの交換に際して給紙ローラ自体を交換することができるので、交換にかかるコストを低く抑えることのできる給紙装置を提供することができる。 According to the above invention, since the paper feed roller itself can be replaced when the paper feed roller is replaced, it is possible to provide a paper feed device capable of reducing the cost of replacement.
さらに本発明の給紙装置は、上記課題を解決するために、上記給紙ローラの回転軸は、上記給紙ローラに対して上記給紙ローラ駆動部からの回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっており、上記給紙ローラが上記非支持部の開放端を介して上記回転軸に着脱可能に設けられていることを特徴としている。 Further, in the paper feed device of the present invention, in order to solve the above problems, the rotation shaft of the paper feed roller is set to the side where the rotational driving force from the paper feed roller drive unit is transmitted to the paper feed roller. The opposite side is a non-supporting portion that is not supported by the fixed object, and the paper feed roller is detachably provided on the rotating shaft via the open end of the non-supporting portion.
上記の発明によれば、給紙ローラの両端側に延びる回転軸は、給紙ローラ駆動部から回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっている、すなわち、回転軸は回転駆動力が伝達される側のみで支持されている。 According to the above invention, the rotating shaft extending to both ends of the paper feed roller is a non-supporting portion on which the side opposite to the side where the rotational driving force is transmitted from the paper feed roller driving unit is not supported by the fixed object. , The rotating shaft is supported only on the side where the rotational driving force is transmitted. そして、給紙ローラは上記非支持部の開放端を介して回転軸に着脱可能に設けられている。 The paper feed roller is detachably provided on the rotating shaft via the open end of the non-support portion. 従って、給紙ローラの回転軸に対する着脱の際には、回転軸の非支持部の開放端から取り外しおよび取り付けを行うことができ、このときに回転軸を支持する固定物などによって着脱が阻害されることもない。 Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment / detachment is hindered by a fixed object that supports the rotating shaft. There is no such thing. この結果、給紙ローラを容易に交換することができる。 As a result, the paper feed roller can be easily replaced.
さらに本発明の給紙装置は、上記課題を解決するために、上記用紙収納部から用紙を取り出すピックアップローラと、上記給紙ローラが着脱可能であって上記回転軸に取り付けられる給紙ローラ保持部材と、上記ピックアップローラを保持するとともに上記給紙ローラ保持部材と着脱可能に設けられたピックアップローラ保持部材とをさらに有し、上記給紙ローラを保持して上記回転軸に取り付けられた上記給紙ローラ保持部材に、上記ピックアップローラを保持したピックアップローラ保持部材が取り付けられてなるローラユニットの状態で、上記ピックアップローラに上記給紙ローラ駆動部から回転駆動力が伝達され、上記給紙ローラは上記ピックアップローラによって取り出された用紙を下流側へ供給することを特徴としている。 Further, in the paper feeding device of the present invention, in order to solve the above problems, a pickup roller for taking out paper from the paper storage unit and a paper feeding roller holding member to which the paper feeding roller is detachable and attached to the rotating shaft And, while holding the pickup roller, the paper feed roller holding member and the pickup roller holding member provided detachably are further provided, and the paper feed roller is held and the paper feed is attached to the rotating shaft. In the state of the roller unit in which the pickup roller holding member holding the pickup roller is attached to the roller holding member, the rotational driving force is transmitted to the pickup roller from the paper feed roller drive unit, and the paper feed roller is described. The feature is that the paper taken out by the pickup roller is supplied to the downstream side.
上記の発明によれば、給紙ローラとピックアップローラとを備える場合に、給紙ローラを給紙ローラ保持部材に対して、またピックアップローラをピックアップローラ保持部材に対して着脱可能とする。 According to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the pickup roller holding member. そして、給紙ローラの回転軸に取り付ける給紙ローラ保持部材に対し、さらにピックアップローラ保持部材を着脱可能とする。 Then, the pickup roller holding member can be further attached to and detached from the paper feeding roller holding member attached to the rotating shaft of the paper feeding roller. 給紙ローラを保持して回転軸に取り付けた状態の給紙ローラ保持部材に、ピックアップローラを保持したピックアップローラ保持部材を取り付けた状態でローラユニットを構成し、このローラユニットの状態でピックアップローラに給紙ローラ駆動部から回転駆動力を伝達して、用紙収納部から用紙を取り出し、給紙ローラでその用紙を下流側へ供給する。 A roller unit is configured with the pickup roller holding member holding the pickup roller attached to the paper feed roller holding member holding the paper feed roller and attached to the rotating shaft, and the pickup roller is in the state of this roller unit. The rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied to the downstream side by the paper feed roller.
給紙ローラを交換する際には、ピックアップローラ保持部材を給紙ローラ保持部材から取り外すなどしておき、給紙ローラを給紙ローラ保持部材と回転軸とから取り外し、新しい給紙ローラをその逆の手順で装着すればよい。 When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and vice versa. You can install it according to the procedure in. 従って、ピックアップローラを備える場合に、給紙ローラとの組み合わせからなる簡単な構成のユニットを形成しながら、給紙ローラの交換にかかるコストを低く抑えることができる。 Therefore, when the pickup roller is provided, it is possible to keep the cost of replacing the paper feed roller low while forming a unit having a simple structure in combination with the paper feed roller.
さらに本発明の給紙装置は、上記課題を解決するために、上記ピックアップローラは上記ピックアップローラ保持部材に着脱可能であることを特徴としている。 Further, the paper feeding device of the present invention is characterized in that the pickup roller can be attached to and detached from the pickup roller holding member in order to solve the above problems.
上記の発明によれば、ピックアップローラはピックアップローラ保持部材に着脱可能であるので、給紙ローラとともに摩耗するピックアップローラをも交換することができる。 According to the above invention, since the pickup roller is detachable from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can be replaced.
さらに本発明の給紙装置は、上記課題を解決するために、上記ローラユニットが上記回転軸の回りに回動可能であることを特徴としている。 Further, the paper feeding device of the present invention is characterized in that the roller unit can rotate around the rotation axis in order to solve the above problems.
上記の発明によれば、給紙ローラの交換に際し、給紙装置の上方に設けられていることが多い画像形成ユニットを取り外した状態で、該画像形成ユニットが設けられていた空間にピックアップローラ側が移動するようにローラユニットを回動させれば、交換作業を容易に行うことができる。 According to the above invention, when the paper feed roller is replaced, the pickup roller side is placed in the space where the image forming unit is provided in a state where the image forming unit, which is often provided above the paper feeding device, is removed. If the roller unit is rotated so as to move, the replacement work can be easily performed. また、ピックアップローラによって用紙収納部から用紙を取り出すときにのみピックアップローラを用紙収納部の用紙に接触するように移動させることができる。 Further, the pickup roller can be moved so as to come into contact with the paper in the paper storage unit only when the paper is taken out from the paper storage unit by the pickup roller.
本発明の給紙装置は、上記課題を解決するために、用紙収納部から用紙を取り出すピックアップローラと、該ピックアップローラにて取り出された用紙をさらに下流側へと供給する給紙ローラと、給紙時に上記給紙ローラを回転駆動する給紙ローラ駆動部とを備えた給紙装置において、上記ピックアップローラと上記給紙ローラとが交換可能に設けられると共に、上記ピックアップローラは、上記給紙ローラの回転軸に取り付けられた保持部材によって上記給紙ローラとローラユニットの状態をなし、上記給紙ローラ駆動部からの回転駆動力が上記保持部材に設けられたアイドルギアを介して当該ピックアップローラに一体に設けられたギアに伝達されることで駆動され、該ギアと一体に着脱されることを特徴としている。 In order to solve the above problems, the paper feed device of the present invention supplies a pickup roller that takes out paper from the paper storage unit, and a paper feed roller that supplies the paper taken out by the pickup roller to the downstream side. In a paper feed device provided with a paper feed roller drive unit that rotationally drives the paper feed roller during paper, the pickup roller and the paper feed roller are interchangeably provided, and the pickup roller is a paper feed roller. The holding member attached to the rotating shaft of the paper feed roller and the roller unit are in a state, and the rotational driving force from the paper feed roller driving unit is applied to the pickup roller via the idle gear provided on the holding member. It is driven by being transmitted to a gear provided integrally, and is characterized in that it is integrally attached to and detached from the gear.
さらに本発明の給紙装置では、上記給紙ローラは、上記給紙ローラ駆動部にて回転駆動される回転軸に給紙ローラ単独で挿入されると共に、給紙ローラ単独で着脱される構成とすることもできる。 Further, in the paper feed device of the present invention, the paper feed roller is inserted into the rotary shaft that is rotationally driven by the paper feed roller drive unit, and is attached to and detached from the paper feed roller alone. You can also do it.
【0042】 [0042]
【発明の効果】 【The invention's effect】
本発明の給紙装置は、以上のように、上記給紙ローラが単独で着脱可能であり、上記給紙ローラの回転軸は、上記給紙ローラに対して上記給紙ローラ駆動部からの回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっており、上記給紙ローラが上記非支持部の開放端を介して上記回転軸に着脱可能に設けられ、上記用紙収納部から用紙を取り出すピックアップローラと、上記給紙ローラが着脱可能であって上記回転軸に取り付けられる給紙ローラ保持部材と、上記ピックアップローラを保持するとともに上記給紙ローラ保持部材と着脱可能に設けられたピックアップローラ保持部材とをさらに有し、上記給紙ローラを保持して上記回転軸に取り付けられた上記給紙ローラ保持部材に、上記ピックアップローラを保持したピックアップローラ保持部材が取り付けられてなるローラユニットの状態で、上記ピックアップローラに上記給紙ローラ駆動部から回転駆動力が伝達され、上記給紙ローラは上記ピックアップローラによって取り出された用紙を下流側へ供給する構成である。 As described above, in the paper feed device of the present invention, the paper feed roller can be attached and detached independently, and the rotation shaft of the paper feed roller rotates with respect to the paper feed roller from the paper feed roller drive unit. The side opposite to the side to which the driving force is transmitted is a non-supporting portion that is not supported by the fixed object, and the paper feeding roller is detachably provided on the rotating shaft via the open end of the non-supporting portion, and the paper is provided. The pickup roller that takes out the paper from the storage unit, the paper feed roller holding member that is detachable and attached to the rotating shaft, and the paper feed roller holding member that holds the pickup roller and is detachable from the paper feed roller holding member. A pickup roller holding member holding the pickup roller is attached to the paper feeding roller holding member further having the provided pickup roller holding member and holding the paper feed roller and attached to the rotating shaft. In the state of the roller unit, the rotary driving force is transmitted to the pickup roller from the paper feed roller drive unit, and the paper feed roller is configured to supply the paper taken out by the pickup roller to the downstream side .
【0043】 [0043]
それゆえ、給紙ローラの交換に際して給紙ローラ自体を交換することができるので、交換にかかるコストを低く抑えることのできる給紙装置を提供することができるという効果を奏する。 Therefore, since the paper feed roller itself can be replaced when the paper feed roller is replaced, it is possible to provide an effect of providing a paper feed device capable of keeping the replacement cost low.
【0045】 0045
それゆえ、給紙ローラの回転軸に対する着脱の際には、回転軸の非支持部の開放端から取り外しおよび取り付けを行うことができ、このときに回転軸を支持する固定物などによって着脱が阻害されることもない。 Therefore, when attaching / detaching the paper feed roller to / from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, attachment / detachment is hindered by a fixed object that supports the rotating shaft. It will not be done. この結果、給紙ローラを容易に交換することができるという効果を奏する。 As a result, the paper feed roller can be easily replaced.
【0047】 [0047]
それゆえ、給紙ローラを交換する際には、ピックアップローラ保持部材を給紙ローラ保持部材から取り外すなどしておき、給紙ローラを給紙ローラ保持部材と回転軸とから取り外し、新しい給紙ローラをその逆の手順で装着すればよい。 Therefore, when replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and remove the new paper feed roller. Can be installed in the reverse procedure. 従って、ピックアップローラを備える場合に、給紙ローラとの組み合わせからなる簡単な構成のユニットを形成しながら、給紙ローラの交換にかかるコストを低く抑えることができるという効果を奏する。 Therefore, when the pickup roller is provided, it is possible to reduce the cost of replacing the paper feed roller while forming a unit having a simple structure in combination with the paper feed roller.
【0048】 0048
さらに本発明の給紙装置は、以上のように、上記ピックアップローラは上記ピックアップローラ保持部材に着脱可能である構成である。 Further, the paper feeding device of the present invention has a configuration in which the pickup roller is detachable from the pickup roller holding member as described above.
【0049】 [0049]
それゆえ、給紙ローラとともに摩耗するピックアップローラをも交換することができるという効果を奏する。 Therefore, it is possible to replace the pickup roller that wears together with the paper feed roller.
【0050】 0050
さらに本発明の給紙装置は、以上のように、上記ローラユニットが上記回転軸の回りに回動可能である構成である。 Further, the paper feeding device of the present invention has a configuration in which the roller unit can rotate around the rotation axis as described above.
【0051】 0051
それゆえ、給紙ローラの交換に際し、画像形成ユニットを取り外した状態で、該画像形成ユニットが設けられていた空間にピックアップローラ側が移動するようにローラユニットを回動させれば、交換作業を容易に行うことができるという効果を奏する。 Therefore, when replacing the paper feed roller, if the roller unit is rotated so that the pickup roller side moves to the space where the image forming unit is provided with the image forming unit removed, the replacement work is easy. It has the effect of being able to do it. また、ピックアップローラによって用紙収納部から用紙を取り出すときにのみピックアップローラを用紙収納部の用紙に接触するように移動させることができるという効果を奏する。 In addition, the pickup roller can be moved so as to come into contact with the paper in the paper storage unit only when the paper is taken out from the paper storage unit by the pickup roller.
本発明の画像形成装置は、以上のように、上記した本発明の給紙装置を備えた構成である。 As described above, the image forming apparatus of the present invention is configured to include the above-described paper feeding device of the present invention.
【図面の簡単な説明】 [Simple explanation of drawings]
【図1】(a)ないし(c)は、本発明の実施の形態に係る給紙装置のローラユニットにおける給紙ローラの交換手順を説明する斜視図である。 1 (a) to 1 (c) are perspective views illustrating a procedure for replacing a paper feed roller in a roller unit of a paper feed device according to an embodiment of the present invention.
【図2】図1のローラユニットの待機時の状態を説明する斜視図である。 2 is a perspective view illustrating a standby state of the roller unit of FIG. 1. FIG.
【図3】図1のローラユニットの給紙時の状態を説明する斜視図である。 3 is a perspective view illustrating a state of the roller unit of FIG. 1 when feeding paper.
【図4】図1のローラユニットを図2および図3の状態とするための周辺の構成を示す斜視図である。 4 is a perspective view showing a peripheral configuration for bringing the roller unit of FIG. 1 into the state of FIGS. 2 and 3. FIG.
【図5】(a)および(b)は、図4の周辺の構成の動作を説明する側面図である。 5 (a) and 5 (b) are side views illustrating the operation of the configuration around FIG. 4. FIG.
【図6】図1のローラユニットの給紙ローラ交換時の状態を説明する斜視図である。 6 is a perspective view illustrating a state when the paper feed roller of the roller unit of FIG. 1 is replaced. FIG.
【図7】図1のローラユニットを図6の状態とするための周辺の構成を示す斜視図である。 7 is a perspective view showing a peripheral configuration for bringing the roller unit of FIG. 1 into the state of FIG. 6. FIG.
【図8】(a)および(b)は、図7の周辺の構成の一部とローラユニットとの位置関係を示す側面図である。 8 (a) and 8 (b) are side views showing the positional relationship between a part of the configuration around FIG. 7 and the roller unit.
【図9】(a)ないし(d)は、図7の周辺の構成の他の部分とローラユニットとの位置関係を示す側面図である。 9 (a) to 9 (d) are side views showing the positional relationship between the roller unit and other parts of the peripheral configuration of FIG. 7. FIG.
【図10】図1のローラユニットからピックアップローラを取り外す状態を説明する斜視図である。 10 is a perspective view illustrating a state in which a pickup roller is removed from the roller unit of FIG. 1. FIG.
【図11】本発明の給紙装置を備える画像形成装置の構成を示す断面図である。 FIG. 11 is a cross-sectional view showing the configuration of an image forming apparatus including the paper feeding device of the present invention.
【符号の説明】 [Explanation of symbols]
6 給紙装置6a 給紙カセット(用紙収納部) 6 Paper feed device 6a Paper feed cassette (paper storage unit)
6b ピックアップユニット(ローラユニット) 6b Pickup unit (roller unit)
11 ピックアップローラ12 給紙ローラ13 回転軸13a 非支持部13b 開放端14 モータ(給紙ローラ駆動部) 11 Pickup roller 12 Paper feed roller 13 Rotating shaft 13a Non-support part 13b Open end 14 Motor (paper feed roller drive unit)
21 ピックアップローラ保持部材22 給紙ローラ保持部材P 用紙[0001] 21 Pickup roller holding member 22 Paper feed roller holding member P Paper [0001]
BACKGROUND OF THE INVENTION BACKGROUND OF THE Invention
The present invention relates to a paper feeding device for paper feeding used in an image forming apparatus such as a copying machine, a printer, and a facsimile machine. The present invention relates to a paper feeding device for paper feeding used in an image forming apparatus such as a copying machine, a printer, and a facsimile machine.
[0002] [0002]
[Prior art] [Prior art]
2. Description of the Related Art Conventionally, image forming apparatuses such as copiers, printers, and facsimile machines are provided with a paper feeding device that supplies paper to a paper conveyance path. In the paper feeding device, the paper is supplied from a paper feeding tray or a paper cassette by a pickup roller or paper feeding roller. A rubber body is used for such a paper feeding roller. As the body wears due to contact with the paper, the paper feeding capability decreases, so the paper feed rollers must be replaced accordingly. Japanese Patent Application Laid-Open No. 5-69964 discloses a paper feed roller unit in which a paper feed roller and its peripheral members are integrated so that the paper feed roller that also serves as a pickup roller can be replaced. There is disclosed a paper feeding device configured to be detachable from a drive shaft of a paper roller. 2. Description of the Related Art Conventionally, image forming pertaining such as copiers, printers, and facsimile machines are provided with a paper feeding device that supplies paper to a paper transmitting path. In the paper feeding device, the paper is supplied from a paper feeding tray or a paper cassette by a pickup roller or paper feeding roller. A rubber body is used for such a paper feeding roller. As the body wears due to contact with the paper, the paper feeding capability decreases, so the paper feed printer must Japanese Patent Application Laid-Open No. 5-69964 examining a paper feed roller unit in which a paper feed roller and its peripheral members are integrated so that the paper feed roller that also serves as a pickup roller can be replaced. There is disclosed a paper feeding device configured to be detachable from a drive shaft of a paper roller.
[0003] [0003]
[Problems to be solved by the invention] [Problems to be solved by the invention]
However, in the configuration of the conventional sheet feeding device, as disclosed in the above publication, the sheet feeding roller is replaced by replacing the entire sheet feeding roller unit. The cost of the replacement was high as much as the replacement. However, in the configuration of the conventional sheet feeding device, as disclosed in the above publication, the sheet feeding roller is replaced by replacing the entire sheet feeding roller unit. The cost of the replacement was high as much as the replacement.
[0004] [0004]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a paper feeding device that can keep the cost for replacing a paper feeding roller low. The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a paper feeding device that can keep the cost for replacing a paper feeding roller low.
[0005] [0005]
[Means for Solving the Problems] [Means for Solving the Problems]
In order to solve the above problems, a sheet feeding device according to the present invention includes a sheet storing unit that stores sheets, a sheet feeding roller that feeds sheets in the sheet storing unit, and the sheet feeding roller that rotates during sheet feeding. In the paper feeding device having a paper feeding roller driving unit, the paper feeding roller is detachable independently. The rotation axis of the paper feed roller is a non-support portion that is not supported by a fixed object on the side opposite to the side to which the rotational driving force from the paper feed roller drive unit is transmitted to the paper feed roller. The paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion, and a pickup roller for taking out paper from the paper storage portion, and the paper feeding roller is detachable, and the rotating shaft A paper feed roller holding member attached to the paper feed roller, and a pick In order to solve the above problems, a sheet feeding device according to the present invention includes a sheet storing unit that stores sheets, a sheet feeding roller that feeds sheets in the sheet storing unit, and the sheet feeding roller that rotates during sheet feeding. In the paper feeding device having a paper feeding roller driving unit, the paper feeding roller is detachable independently. The rotation axis of the paper feed roller is a non-support portion that is not supported by a fixed object on the side opposite to the side To which the rotational driving force from the paper feed roller drive unit is transmitted to the paper feed roller. The paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion, and a pickup roller for taking out paper from the paper storage portion, and the paper feeding roller is detachable, and the rotating shaft A paper feed roller holding member attached to the paper feed roller, and a pick up roller holding member that holds the pickup roller and is detachable from the paper feed roller holding member. In a state of a roller unit in which the pickup roller holding member holding the pickup roller is attached to the paper feed roller holding member attached to the shaft. Rotational driving force from the feed roller drive unit to the pick-up roller is transmitted, the paper feed roller feeds a sheet taken out by the pickup roller to the downstream It is characterized by that. up roller holding member that holds the pickup roller and is detachable from the paper feed roller holding member. In a state of a roller unit in which the pickup roller holding member holding the pickup roller is attached to the paper feed roller holding member attached to the shaft. Rotational driving force from the feed roller drive unit to the pick-up roller is transmitted, the paper feed roller feeds a sheet taken out by the pickup roller to the downstream It is characterized by that.
[0006] [0006]
According to the above invention, the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced. Therefore, it is possible to provide a sheet feeding apparatus that can keep the cost for replacement low. According to the above invention, the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced. Therefore, it is possible to provide a sheet feeding apparatus that can keep the cost for replacement low.
[0008] [0008]
Also, According to the above invention, the rotary shaft extending to both ends of the paper feed roller is a non-supporting portion that is not supported by the fixed object on the side opposite to the side where the rotational driving force is transmitted from the paper feed roller driving portion. The rotating shaft is supported only on the side where the rotational driving force is transmitted. The paper feed roller is detachably provided on the rotating shaft through the open end of the non-supporting portion. Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment or removal is hindered by a fixed object that supports the rotating shaft. It never happens. As a result, the paper feed roller can be easily replaced. Also, According to the above invention, the rotary shaft extending to both ends of the paper feed roller is a non-supporting portion that is not supported by the fixed object on the side opposite to the side where the rotational driving force is transmitted from the The paper feed roller is detachably provided on the rotating shaft through the open end of the non-supporting portion. Therefore, when the paper. The rotating shaft is supported only on the side where the rotational driving force is transmitted. feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment or removal is hindered by a fixed object that supports The rotating shaft. It never happens. As a result, the paper feed roller can be easily replaced.
[0010] [0010]
further, According to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the pickup roller holding member. The pickup roller holding member can be further attached to and detached from the paper supply roller holding member attached to the rotation shaft of the paper supply roller. The roller unit is configured with the pickup roller holding member holding the pickup roller attached to the paper supply roller holding member holding the paper supply roller and attached to the rotating shaft. A rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied downstream by the paper feed roller. further, According to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the The pickup roller holding member can be further attached to and detached from the paper supply roller holding member attached to the rotation shaft of the paper supply roller. The roller unit is configured with the pickup roller holding member holding the pickup roller. attached to the paper supply roller holding member holding the paper supply roller and attached to the rotating shaft. A rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied. downstream by the paper feed roller.
[0011] [0011]
When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, etc., remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and replace the new paper feed roller. It can be installed in the following procedure. Therefore, in the case where the pickup roller is provided, the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration composed of a combination with the paper feed roller. When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, etc., remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and replace the new paper feed roller. It Therefore, in the case where the pickup roller is provided, the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration composed of a combination with the paper feed roller.
[0012] [0012]
Furthermore, in order to solve the above problems, the paper feeding device of the present invention is characterized in that the pickup roller is detachable from the pickup roller holding member. Furthermore, in order to solve the above problems, the paper feeding device of the present invention is characterized in that the pickup roller is detachable from the pickup roller holding member.
[0013] [0013]
According to the above invention, since the pickup roller can be attached to and detached from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can also be replaced. According to the above invention, since the pickup roller can be attached to and detached from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can also be replaced.
[0014] [0014]
Furthermore, in order to solve the above-described problems, the paper feeding device according to the present invention is characterized in that the roller unit is rotatable around the rotation shaft. Furthermore, in order to solve the above-described problems, the paper feeding device according to the present invention is characterized in that the roller unit is developing around the rotation shaft.
[0015] [0015]
According to the above invention, when replacing the paper feed roller, the image forming unit, which is often provided above the paper feeding device, is removed, and the pickup roller side is placed in the space where the image forming unit is provided. If the roller unit is rotated so as to move, the replacement work can be easily performed. Further, the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller. According to the above invention, when replacing the paper feed roller, the image forming unit, which is often provided above the paper feeding device, is removed, and the pickup roller side is placed in the space where the image forming unit is provided. The roller unit is rotated so as to move, the replacement work can be easily performed. Further, the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller.
In order to solve the above problems, an image forming apparatus according to the present invention includes the above-described sheet feeding device according to the present invention. In order to solve the above problems, an image forming apparatus according to the present invention includes the above-described sheet feeding device according to the present invention.
[0016] [0016]
DETAILED DESCRIPTION OF THE INVENTION CVD DESCRIPTION OF THE Invention
An embodiment embodying the paper feeding device of the present invention will be described below with reference to FIGS. 1 to 11. An embodiment embodying the paper feeding device of the present invention will be described below with reference to FIGS. 1 to 11.
[0017] [0017]
FIG. 11 is a front sectional view of a configuration example of the copying machine 1 as an image forming apparatus on which the paper feeding device according to the present embodiment is mounted. The copying machine 1 includes a document cover 2, a document table 3, a scanner unit 4, an image forming unit 5, a sheet feeding device 6, a sheet feeding / conveying unit 7, a sheet discharging / conveying unit 8, and a sheet discharging tray 9. FIG. 11 is a front sectional view of a configuration example of the copying machine 1 as an image forming apparatus on which the paper feeding device according to the present embodiment is mounted. The copying machine 1 includes a document cover 2, a document table 3 , a scanner unit 4, an image forming unit 5, a sheet feeding device 6, a sheet feeding / conveying unit 7, a sheet substantially / conveying unit 8, and a sheet substantially tray 9.
[0018] [0018]
The document table 3 is a transparent glass body disposed on the upper surface of the main body of the copying machine 1, and the document cover 2 is further provided thereon. The scanner unit 4 is disposed in the main body of the copying machine 1 below the document table 3, and includes an exposure unit 4a including an exposure lamp and a first mirror, a mirror unit 4b including a second mirror and a third mirror, and an imaging lens. 4c and a photoelectric conversion element (hereinafter referred to as CCD) 4d. The exposure unit 4a reciprocates in the horizontal direction on the lower surface side of the document table 3, and exposes and scans the image of the document placed on the upper surface of the document table 3 with the light emitted from the exposure lamp. Reflected light from the image surface of the document due to light irradiation of the exposure lamp is guided to the mirror unit 4b by the first mirror. The mirror unit 4b reciprocates at a predetermined speed with resp The document table 3 is a transparent glass body disposed on the upper surface of the main body of the copying machine 1, and the document cover 2 is further provided impurities. The scanner unit 4 is disposed in the main body of the copying machine 1 below the document table 3, and includes an exposure unit 4a including an exposure lamp and a first mirror, a mirror unit 4b including a second mirror and a third mirror, and an imaging lens. 4c and a photoelectric conversion element (hereinafter referred to as CCD ) 4d. The exposure unit 4a reciprocates in the horizontal direction on the lower surface side of the document table 3, and exposes and scans the image of the document placed on the upper surface of the document table 3 with the light emitted from the exposure lamp . Reflected light from the image surface of the document due to light irradiation of the exposure lamp is guided to the mirror unit 4b by the first mirror. The mirror unit 4b reciprocates at a predetermined speed with resp ect to the exposure unit 4a, and guides the light reflected by the first mirror of the exposure unit 4a to the subsequent optical system. The imaging lens 4c focuses the light from the mirror unit 4b on the light receiving surface of the CCD 4d, and the CCD 4d outputs a signal corresponding to the amount of light received on the light receiving surface. The output signal of the CCD 4d is converted into digital data, subjected to a predetermined process in an image processing unit (not shown), and output as image data. ect to the exposure unit 4a, and guides the light reflected by the first mirror of the exposure unit 4a to the subsequent optical system. The imaging lens 4c focuses the light from the mirror unit 4b on the light receiving surface of the CCD 4d, and The output signal of the CCD 4d is converted into digital data, subjected to a predetermined process in an image processing unit (not shown), and output as. The CCD 4d outputs a signal corresponding to the amount of light received on the light receiving surface. image data.
[0019] [0019]
A part below the scanner unit 4 is a space for paper discharge, and the image forming unit 5, the paper feed device 6, the paper feed transport unit 7, and the paper discharge transport unit 8 include the paper discharge space. Is disposed inside the main body of the copying machine 1 provided below the scanner unit 4. A photosensitive drum 5a is provided at the center of the image forming unit 5 so as to be rotatably supported in the direction of arrow I in the figure. Around the photosensitive drum 5a, a charger 5b, an image writing unit 5c, a developing tank 5d, a transfer device 5e, and a cleaner 5f are arranged. A part below the scanner unit 4 is a space for paper discharge, and the image forming unit 5, the paper feed device 6, the paper feed transport unit 7, and the paper discharge transport unit 8 include the paper discharge space. Is disposed inside the main body of the copying machine 1 provided below the scanner unit 4. A electrically drum 5a is provided at the center of the image forming unit 5 so as to be rotatably supported in the direction of arrow I in the figure. 5a, a charger 5b, an image writing unit 5c, a developing tank 5d, a transfer device 5e, and a cleaner 5f are arranged.
[0020] [0020]
The paper feeding device 6 is provided at the lowermost part of the main body of the copying machine 1, and includes a paper feeding cassette 6a serving as a paper storage unit for storing the paper P, a pickup roller (described later) for taking out the paper P from the paper feeding cassette 6a. A pickup unit 6b having a paper feed roller (described later) for supplying it to the downstream side, and a paper feed roller driving unit (described later) for driving the paper feed roller of the pickup unit 6b are provided. The sheet feeding / conveying unit 7 includes a conveying path 7a from the sheet feeding device 6 to a position immediately before the transfer unit 5e of the image forming unit 5 and a registration roller 7b provided on the conveying path 7a. The paper discharge conveyance unit 8 bypasses the upper side of the image forming unit 5 from the transfer unit 5e after the image forming unit 5 and goes to the paper discharge space, and a fixing roller 8b provided on the conv The paper feeding device 6 is provided at the lowermost part of the main body of the copying machine 1, and includes a paper feeding cassette 6a serving as a paper storage unit for storing the paper P, a pickup roller (described later) for taking out the paper P from the paper feeding cassette 6a. A pickup unit 6b having a paper feed roller (described later) for supplying it to the downstream side, and a paper feed roller driving unit (described later) for driving the paper feed roller of the pickup unit 6b are provided. The sheet feeding / conveying unit 7 includes a conveying path 7a from the sheet feeding device 6 to a position immediately before the transfer unit 5e of the image forming unit 5 and a registration roller 7b provided on the conveying path 7a The paper discharge discharging unit 8 bypasses the upper side of the image forming unit 5 from the transfer unit 5e after the image forming unit 5 and goes to the paper discharge space, and a fixing roller 8b provided on the conv eyance path 8a. , And a paper discharge roller 8c provided on the most downstream side of the transport path 8a. The most downstream side of the conveyance path 8a is a boundary portion between the paper discharge space and the main body of the copying machine 1, and the paper discharge tray 9 receives the paper P discharged from the paper discharge roller 8c. It is provided at the bottom of the paper space. eyance path 8a., And a paper discharge roller 8c provided on the most downstream side of the transport path 8a. The most downstream side of the transport path 8a is a boundary portion between the paper discharge space and the main body of the copying machine 1 , and the paper discharge tray 9 receives the paper P discharged from the paper discharge roller 8c. It is provided at the bottom of the paper space.
[0021] [0021]
At the time of image formation, after the charger 5b uniformly applies a single polarity charge to the surface of the photosensitive drum 5a rotating in the direction of arrow I in the image forming unit 5, the image writing unit 5c is connected from the image processing unit. The image light modulated based on the output image data is irradiated to create an electrostatic latent image by photoconductive action on the surface of the photosensitive drum 5a. The developing tank 5d supplies a developer to the surface of the photosensitive drum 5a, and visualizes the electrostatic latent image into a developer image. In the paper feeding device 6, the paper P in the paper feeding cassette 6a is taken out one by one by the rotation of the pickup roller of the pickup unit 6b prior to the rotation of the photosensitive drum 5a. The picked-up paper P is separated as it is in the case of a single sheet and into a single sheet in the case of a plurality of sheets by a paper feed roller of the pi At the time of image formation, after the charger 5b uniformly applies a single polarity charge to the surface of the photosensitive drum 5a rotating in the direction of arrow I in the image forming unit 5, the image writing unit 5c is connected from the image processing The image light modulated based on the output image data is forming to create an electrostatic latent image by photoconductive action on the surface of the photosensitive drum 5a. The developing tank 5d supplies a developer to the surface of the photosensitive drum 5a, and visualizes The electrostatic latent image into a developer image. In the paper feeding device 6, the paper P in the paper feeding cassette 6a is taken out one by one by the rotation of the pickup roller of the pickup unit 6b prior to the rotation of the photosensitive drum 5a. The picked-up paper P is separated as it is in the case of a single sheet and into a single sheet in the case of a plurality of sheets by a paper feed roller of the pi ckup unit 6b and a paper handling unit (described later) pressed against the paper feed roller. Then, the sheet is fed to the conveying path 7a of the sheet feeding and conveying unit 7 and sent to the registration roller 7b. ckup unit 6b and a paper handling unit (described later) pressed against the paper feed roller. Then, the sheet is fed to the conveying path 7a of the sheet feeding and conveying unit 7 and sent to the registration roller 7b.
[0022] [0022]
The paper P that has reached the registration roller 7b is temporarily stopped with its front end abutting the registration roller 7b, and the registration roller 7b is held on the surface of the photosensitive drum 5a at the position of the transfer unit 5e. The rotation is started so as to face the front end of the developer image thus formed, and the sheet P is guided to the transfer device 5e. The transfer device 5e transfers the developer image carried on the photosensitive drum 5a onto the surface of the paper P. After the transfer is completed, the cleaner 5f removes the toner remaining on the surface of the photosensitive drum 5a. The paper P on which the developer image has been transferred is guided to the transport path 8a of the paper discharge transport unit 8 and heated and pressurized while passing through the fixing roller 8b, so that the developer image melts and the recording paper It adheres to the 1st side (one side). The paper P having the developer image fixed on The paper P that has reached the registration roller 7b is temporarily stopped with its front end abutting the registration roller 7b, and the registration roller 7b is held on the surface of the photosensitive drum 5a at the position of the transfer unit 5e. The rotation is started so as to face the front end of the developer image thus formed, and the sheet P is guided to the transfer device 5e. The transfer device 5e transfers the developer image carried on the photosensitive drum 5a onto the surface of the paper P. After The transfer is completed, the cleaner 5f removes the toner remaining on the surface of the photosensitive drum 5a. The paper P on which the developer image has been transferred is guided to the transport path 8a of the paper discharge transport unit 8 and heated and relatively while passing through the fixing roller 8b, so that the developer image melts and the recording paper It adheres to the 1st side (one side). The paper P having the developer image fixed on the first surface is discharged to the paper discharge tray 9 by the rotation of the paper discharge roller 8c, thereby providing the user with a printed matter on which one side is formed. the first surface is discharged to the paper discharge tray 9 by the rotation of the paper discharge roller 8c, thereby providing the user with a printed matter on which one side is formed.
[0023] [0023]
Next, the paper feeding device 6 used in the copying machine 1 having the above configuration will be described in detail. FIG. 2 shows a configuration of the pickup unit 6b as a roller unit and its peripheral portion in the paper feeding device 6. The pickup unit 6b has a pickup roller 11 and a paper feed roller 12. The pickup roller 11 is also fed so that the pickup roller 11 is positioned above the leading end side in the paper feed direction of the paper P stored in the paper feed cassette 6a. The paper roller 12 is disposed so as to be positioned on the downstream side of the paper feed direction with respect to the paper feed direction leading end of the paper P. The paper feed roller 12 is connected to a motor 14 as a paper feed roller driving unit via a rotating shaft 13 and is driven to rotate by the motor 14 during paper feeding. In the figure, the motor 14 is directly connected to the rotary shaft 13, but the present invention is not limited to this, and the motor 14 may be Next, the paper feeding device 6 used in the copying machine 1 having the above configuration will be described in detail. FIG. 2 shows a configuration of the pickup unit 6b as a roller unit and its peripheral portion in the paper feeding device 6. The pickup unit 6b has a pickup roller 11 and a paper feed roller 12. The pickup roller 11 is also fed so that the pickup roller 11 is positioned above the leading end side in the paper feed direction of the paper P stored in the paper feed cassette 6a. The paper roller 12 is disposed so as to be positioned on the downstream side of the paper feed direction with respect to the paper feed direction leading end of the paper P. The paper feed roller 12 is connected to a motor 14 as a paper feed roller driving unit via a rotating shaft 13 and is driven to rotate by the motor 14 during paper feeding. In the figure, the motor 14 is directly connected to the rotary shaft 13, but the present invention is not limited to this, and the motor 14 may be connected to the rotary shaft 13 via a gear. connected to the rotary shaft 13 via a gear.
[0024] [0024]
The pick-up roller 11 takes out the paper P from the paper feed cassette 6a by contacting the uppermost paper P of the paper feed cassette 6a as shown in FIG. A sheet separating unit 15 is provided below the sheet feeding roller 12, and the pickup roller 11 moves from the sheet feeding cassette 6 a to a plurality of sheets by the contact of the separating plate with the lower surface of the sheet feeding roller 12 by a spring force. Even when P... Are taken out, they can be separated one by one and supplied to the paper feeding / conveying section 7. The pick-up roller 11 takes out the paper P from the paper feed cassette 6a by contacting the uppermost paper P of the paper feed cassette 6a as shown in FIG. A sheet separating unit 15 is provided below the sheet feeding roller 12, and the pickup roller 11 moves from the sheet feeding cassette 6 a to a plurality of sheets by the contact of the separating plate with the lower surface of the sheet feeding cassette 12 by a spring force. Even when P ... Are taken out, they can be separated one by one and supplied to the paper feeding / conveying section 7.
[0025] [0025]
FIG. 1 shows a detailed configuration of the pickup unit 6b. As shown in FIG. 5A, the pickup unit 6b is provided with a pickup roller holding member 21 that holds the pickup roller 11 and a paper feed roller holding member 22 that holds the paper feed roller 12. The pickup roller 11 is detachably attached to the pickup roller holding member 21 integrally with the gear 17, and the paper feed roller 12 is detachable from the paper feed roller holding member 22. The paper feed roller holding member 22 is attached to the rotary shaft 13 of the paper feed roller 12 and may or may not be detachable from the rotary shaft 13, but is attached to the rotary shaft 13 while holding the paper feed roller 12. In this state, the pickup roller holding member 21 holding the pickup roller 11 is further removable. FIG. 1 shows a detailed configuration of the pickup unit 6b. As shown in FIG. 5A, the pickup unit 6b is provided with a pickup roller holding member 21 that holds the pickup roller 11 and a paper feed roller holding member 22 that holds the paper feed roller 12. The pickup roller 11 is detachably attached to the pickup roller holding member 21 with the gear 17, and the paper feed roller 12 is detachable from the paper feed roller holding member 22. The paper feed roller holding member 22 is attached to the rotary shaft 13 of the paper feed roller 12 and may or may not be detachable from the rotary shaft 13, but is attached to the rotary shaft 13 while holding the paper feed roller 12. In this state, the pickup roller holding member 21 holding the pickup roller 11 is further removable.
[0026] [0026]
The rotating shaft 13 is supported by a fixed object via a bearing (not shown) on the side to which the rotational driving force is transmitted from the motor 14, but in a state where the paper feeding roller 12 is attached, The side opposite to the side to which the rotational driving force is transmitted is a non-supporting portion 13a that is not supported by a fixed object. As shown in FIG. 4B, the non-supporting portion 13a is provided with a length that slightly protrudes from the paper feed roller 12. As shown in FIG. When it is removed from the roller holding member 22, it is removed from the rotating shaft 13 through the open end 13b of the non-supporting portion 13a. When the paper feed roller 12 is attached to the rotary shaft 13, the rotary shaft 13 is passed through the shaft hole of the paper feed roller 12 through the open end 13 b and the paper feed roller 12 is attached to the gear 19 previously attached to the rotary shaft 13. . As described above, the sheet feeding r The rotating shaft 13 is supported by a fixed object via a bearing (not shown) on the side to which the rotational driving force is transmitted from the motor 14, but in a state where the paper feeding roller 12 is attached, The side opposite to the side to which the rotational driving force is transmitted is a non-supporting portion 13a that is not supported by a fixed object. As shown in FIG. 4B, the non-supporting portion 13a is provided with a length that slightly protrudes from the paper feed roller 12. As shown in FIG. When it is removed from the roller holding member 22, it is removed from the rotating shaft 13 through the open end 13b of the non-supporting portion 13a. When the paper feed roller 12 is attached to the rotary shaft 13, the rotary shaft 13 is passed through the shaft hole of the paper feed roller 12 through the open end 13 b and the paper feed roller 12 is attached to the gear 19 previously attached to the rotary shaft 13.. As described above, the sheet feeding r oller 12 is detachably attached to the sheet feeding device 6. oller 12 is detachably attached to the sheet feeding device 6.
[0027] [0027]
Further, as shown in FIG. 2B, the paper feed roller holding member 22 is connected to the rotary shaft 13 so that the pickup roller 11 is provided alongside the paper feed roller 12 when the pickup roller holding member 21 is attached. The roller holding plate 22a protruding from the holding side of the paper feed roller 12 in the direction orthogonal to the rotary shaft 13 is provided with a bearing for receiving the rotary shaft of the pickup roller 11. Further, when the pickup roller 11 is attached to the roller holding plate 22a, both the gear 19 of the paper feed roller 12 and the gear 17 of the pickup roller 11 are engaged with each other, and a rotational driving force is applied to the pickup roller 11. An idle gear 18 for transmission is provided. The roller holding plate 22a is further extended in a direction toward the open end 13b in parallel with the rotation shaft 13 so as to sandwich the pickup roller 11 to be attached between the roller feeding plate 12 and the sheet fe Further, as shown in FIG. 2B, the paper feed roller holding member 22 is connected to the rotary shaft 13 so that the pickup roller 11 is provided alongside the paper feed roller 12 when the pickup roller holding member 21 is attached. The roller holding plate 22a pertaining from the holding side of the paper feed roller 12 in the direction orthogonal to the rotary shaft 13 is provided with a bearing for receiving the rotary shaft of the pickup roller 11. Further, when the pickup roller 11 is attached to the roller holding plate 22a, both the gear 19 of the paper feed roller 12 and the gear 17 of the pickup roller 11 are engaged with each other, and a rotational driving force is applied to the pickup roller 11. An idle gear 18 for transmission is provided The roller holding plate 22a is further extended in a direction toward the open end 13b in parallel with the rotation shaft 13 so as to sandwich the pickup roller 11 to be attached between the roller feeding plate 12 and the sheet fe eding roller 12. A locking claw 22b for attaching the pickup roller holding member 21 is provided on the surface opposite to the rotary shaft 13 side of the end portion in the extending direction. Further, a fitting hole 22c into which a later-described protrusion 21c of the pickup roller holding member 21 is fitted is provided at the front end portion in the extending direction. eding roller 12. A locking claw 22b for attaching the pickup roller holding member 21 is provided on the surface opposite to the rotary shaft 13 side of the end portion in the extending direction. Further, a fitting hole 22c into which a later-described protrusion 21c of the pickup roller holding member 21 is fitted is provided at the front end portion in the extending direction.
[0028] [0028]
The pickup roller holding member 21 includes a roller holding plate 21 a that is parallel to the holding roller 12 holding side portion of the roller holding plate 22 a when attached to the paper supply roller holding member 22. The roller holding plate 21 a is connected to the vicinity of one end of the rotation shaft of the pickup roller 11 (on the side opposite to the paper feed roller holding member 22 side). Further, the roller holding plate 21a is provided with a locking claw 21b that is locked to the locking claw 22b of the roller holding plate 22a and a protrusion 21c that is fitted into the fitting hole 22c. The pickup roller holding member 21 includes a roller holding plate 21 a that is parallel to the holding roller 12 holding side portion of the roller holding plate 22 a when attached to the paper supply roller holding member 22. The roller holding plate 21 a is connected Further, the roller holding plate 21a is provided with a locking claw 21b that is locked to the closer of one end of the rotation shaft of the pickup roller 11 (on the side opposite to the paper feed roller holding member 22 side). locking claw 22b of the roller holding plate 22a and a protrusion 21c that is fitted into the fitting hole 22c.
[0029] [0029]
Further, the roller holding plate 21a is provided with a shaft hole 21d into which the rotation shaft 13 of the paper feed roller 12 is inserted. The pickup roller holding member 21 is also attached to the rotation shaft 13 via a bearing. Thereby, the whole pickup unit 6b is stably attached to the rotating shaft 13. Further, the roller holding plate 21 a is provided with a sheet pressing member 21 e that presses the sheet P supplied from above with the lower surface side of the sheet feeding roller 12 in a state where the rotating shaft 13 is inserted, protruding in the direction of the rotating shaft 13. Yes. The sheet pressing member 21e has a curved surface in which the lower surface side of the sheet feeding roller 12 is extended in the direction of the opening end 13b of the rotating shaft 13 as it is. Further, the roller holding plate 21a is provided with a shaft hole 21d into which the rotation shaft 13 of the paper feed roller 12 is inserted. The pickup roller holding member 21 is also attached to the rotation shaft 13 via a bearing. whole pickup unit 6b is stably attached to the rotating shaft 13. Further, the roller holding plate 21 a is provided with a sheet pressing member 21 e that presses the sheet P supplied from above with the lower surface side of the sheet feeding roller 12 in a state where the rotating shaft 13 is inserted, forming in the direction of the rotating shaft 13. Yes. The sheet pressing member 21e has a curved surface in which the lower surface side of the sheet feeding roller 12 is extended in the direction of the opening end 13b of the rotating shaft 13 as it is.
[0030] [0030]
The pickup unit 6b having the above-described configuration is rotatable about the rotation shaft 13, and as shown in FIG. 2, the pickup roller 11 is in the standby state when the paper P is not fed. Rotate away from P (in the direction of arrow D). Further, as shown in FIG. 3, when the paper P is fed, the pickup roller 11 rotates (in the direction of arrow C) so as to contact the paper P of the paper feed cassette 6a. Hereinafter, the rotation mechanism of the pickup unit 6b will be described. The pickup unit 6b having the above-described configuration is involved about the rotation shaft 13, and as shown in FIG. 2, the pickup roller 11 is in the standby state when the paper P is not fed. Rotate away from P (in the direction of arrow D). Further, as shown in FIG. 3, when the paper P is fed, the pickup roller 11 rotates (in the direction of arrow C) so as to contact the paper P of the paper feed cassette 6a. , the rotation mechanism of the pickup unit 6b will be described.
[0031] [0031]
As shown in FIG. 4, in the paper feed roller holding member 22, the roller holding plate 22 a has a rotation shaft 13 of the paper feed roller 12 and a rotation shaft of the pickup roller 11 above the mounting portion of the pickup roller 11. A protruding plate 22 d is provided that is a flat plate substantially parallel to the surface to be formed and protrudes along the rotation shaft 13 toward the driving force transmission side. Further, a substantially U-shaped arm 31 is provided outside the pickup unit 6b, and the tip of the arm 31 on the long side is in contact with the lower surface of the protruding plate 22d. The arm 31 is rotatable around a shaft 32 passing through the intersection of the long side and the short side, and the short side is a plan of a solenoid 33 provided for restricting the amount of rotation around the shaft 32. It is connected to a jar 33a (see FIG. 5). As shown in FIG. 4, in the paper feed roller holding member 22, the roller holding plate 22 a has a rotation shaft 13 of the paper feed roller 12 and a rotation shaft of the pickup roller 11 above the mounting portion of the pickup roller 11. A substantially plate 22 d is provided that is a flat plate substantially parallel to the surface to be formed and protrudings along the rotation shaft 13 toward the driving force transmission side. Further, a substantially U-shaped arm 31 is provided outside the pickup unit 6b, and the tip of the arm 31 on the long side is in contact with the lower surface of the utilizing plate 22d. The arm 31 is rotating around a shaft 32 passing through the intersection of the long side and the short side, and The short side is a plan of a paper 33 provided for restricting the amount of rotation around the shaft 32. It is connected to a jar 33a (see FIG. 5).
[0032] [0032]
FIG. 5 is a view of FIG. 4 viewed from the side surface in the direction orthogonal to the rotation shaft 13. 3A shows the case where the pickup unit 6b is in the state of paper feeding as shown in FIG. 3, and the plunger 33a of the solenoid 33 is pulled toward the inside of the solenoid 33, so that the long side of the arm 31 is It is descending. In this state, there is a play that allows the arm 31 to move slightly as shown by the broken line, but the long side of the arm 31 is biased upward by the compression spring 34 as shown in FIG. The plunger 33a is lifted up to the maximum allowable height at this position of the plunger 33a. The pickup roller 11 side of the pickup unit 6b moves in the direction of arrow C in the figure due to its own weight, and comes into contact with the paper P in a state of being lowered on the long side of the arm 31 at the above position. The paper cassette 6 can be taken out. FIG. 5 is a view of FIG. 4 viewed from the side surface in the direction orthogonal to the rotation shaft 13. 3A shows the case where the pickup unit 6b is in the state of paper feeding as shown in FIG. 3, and the In this state, there is a play that allows the arm 31 to move slightly as shown by the plunger 33a of the utilizing 33 is pulled toward the inside of the electrically 33, so that the long side of the arm 31 is It is descending. broken line, but the long side of the arm 31 is biased upward by the compression spring 34 as shown in FIG. The brunette 33a is lifted up to the maximum allowable height at this position of the solenoid 33a. The pickup roller 11 side of the pickup unit 6b moves in the direction of arrow C in the figure due to its own weight, and comes into contact with the paper P in a state of being lowered on the long side of the arm 31 at the above position. The paper cassette 6 can be taken out.
[0033] [0033]
On the other hand, FIG. 7B shows the case where the pickup unit 6b is in a standby state as shown in FIG. 2, and the plunger 33a of the solenoid 33 jumps out of the solenoid 33, so that the compression spring 34 With the urging force, the long side of the arm 31 is raised in the direction of arrow D in the figure. The ascending limit is determined within a range in which the short side of the arm 31 is rotatable. Thus, according to the pickup unit 6b, the pickup roller 11 is brought into contact with the paper P of the paper feed cassette 6a when the paper P is supplied, and the pickup roller 11 is separated from the paper P of the paper feed cassette 6a during standby. be able to. On the other hand, FIG. 7B shows the case where the pickup unit 6b is in a standby state as shown in FIG. 2, and the plunger 33a of the communicating 33 jumps out of the solenoid 33, so that the compression spring 34 With The ascending limit is determined within a range in which the short side of the arm 31 is communicating. Thus, according to the pickup unit. The urging force, the long side of the arm 31 is raised in the direction of arrow D in the figure. 6b, the pickup roller 11 is brought into contact with the paper P of the paper feed solenoid 6a when the paper P is supplied, and the pickup roller 11 is separated from the paper P of the paper feed solenoid 6a during standby. ..
[0034] [0034]
Further, as shown in FIG. 6, the pickup unit 6b can be manually or automatically rotated until the pickup roller 11 and the paper feed roller 12 are aligned in a direction substantially orthogonal to the paper P surface. it can. The rotation angle is not limited to this, but may be arbitrary. However, if the rotation angle can be rotated as shown in the figure, it is often provided above the sheet feeding device 6 when the sheet feeding roller 12 is replaced. By removing the image forming unit constituting the image forming unit 5, the replacement work can be performed in the space in which the image forming unit is provided, and the work becomes easy. Further, as shown in FIG. 6, the pickup unit 6b can be manually or automatically rotated until the pickup roller 11 and the paper feed roller 12 are aligned in a direction substantially orthogonal to the paper P surface. It can. The rotation angle is Not limited to this, but may be arbitrary. However, if the rotation angle can be rotated as shown in the figure, it is often provided above the sheet feeding device 6 when the sheet feeding roller 12 is replaced. By removing the image forming unit respectively the image forming unit 5, the replacement work can be performed in the space in which the image forming unit is provided, and the work becomes easy.
[0035] [0035]
The rotation operation of the pickup unit 6b at this time will be described below. As shown in FIG. 7, in the paper feed roller holding member 22, the roller holding plate 22 a is adjacent to the locking claw 22 b, and a surface formed by the rotary shaft 13 of the paper feed roller 12 and the rotary shaft of the pickup roller 11. A protruding plate 22e that is a substantially parallel flat plate and protrudes in a direction away from the rotating shaft 13 is provided. A first hook 41 extending from a fixed object is provided outside the pickup unit 6b, and comes into contact with the upper surface of the protruding plate 22e while the pickup unit 6b is rotating. In addition, a hook hole 22f into which a second hook 42 provided outside the pickup unit 6b is inserted is provided in the roller holding side portion of the roller holding plate 22a in order to determine the rotation end position of the pickup unit 6b. Yes. In the figure, the gears 17 and 19 and the idle gear 18 shown in FIG The rotation operation of the pickup unit 6b at this time will be described below. As shown in FIG. 7, in the paper feed roller holding member 22, the roller holding plate 22 a is adjacent to the locking claw 22 b, and a surface formed by the rotary shaft 13 of the paper feed roller 12 and the rotary shaft of the pickup roller 11. A substantially plate 22e that is a substantially parallel flat plate and protrudings in a direction away from the rotating shaft 13 is provided. A first hook 41 extending from a fixed object is provided outside the pickup unit 6b, and comes into contact with the upper surface of the utilizing plate 22e while the pickup unit 6b is rotating. In addition, a hook hole 22f into which a second hook 42 provided outside the pickup unit 6b is inserted is provided in the roller holding side portion of the roller holding plate 22a in order to determine the rotation end position of the pickup unit 6b. Yes. In the figure, the gears 17 and 19 and the idle gear 18 shown in FIG . 1 are not shown so that the position of the hook hole 22f can be easily understood. . 1 are not shown so that the position of the hook hole 22f can be easily understood.
[0036] [0036]
FIG. 8 shows the positional relationship between the first hook 41 and the pickup unit 6b. FIG. 4A shows a state when the copying machine 1 is used. When the pickup unit 6b is rotated around the rotation shaft 13 to lift the pickup roller 11 side, the pickup unit 6b protrudes. The plate 22e is pressed by the first hook 41, and the rotation range is restricted to the range indicated by the arrow CE in the figure. The range of the arrow CE includes the rotation range (the range of the arrow CD) between the standby state of FIG. 2 and the paper feeding state of FIG. FIG. 4B shows a state when the paper feed roller 12 is replaced. After the image forming unit above the pickup unit 6b is removed from the copying machine 1, the first hook 41 is shown by the arrow F in FIG. The pickup unit 6b is rotated in the direction of the arrow G in the figure beyond the range of the arrow CE. FIG. 8 shows the positional relationship between the first hook 41 and the pickup unit 6b. FIG. 4A shows a state when the copying machine 1 is used. When the pickup unit 6b is rotated around the rotation shaft 13 to lift the pickup roller 11 The plate 22e is pressed by the first hook 41, and the rotation range is restricted to the range indicated by the arrow CE in the figure. The range of the arrow CE includes the rotation range (the range) of the arrow CD) between the standby state of FIG. 2 and the paper feeding state of FIG. FIG. 4B shows a state when the paper feed roller 12 is replaced. After the image forming unit above the pickup unit 6b is removed from the copying machine 1, the first hook 41 is shown by the arrow F in FIG. The pickup unit 6b is rotated in the direction of the arrow G in the figure beyond the range of the arrow CE.
[0037] [0037]
FIG. 9 shows the positional relationship between the second hook 42 and the pickup unit 6b. FIG. 9A corresponds to the state of FIG. 8A, and when the pickup unit 6b is rotated in the direction of arrow G as shown in FIG. 8B, the pickup unit is shown in FIG. 9B. The second hook 42 is inserted into the hook hole 22f of 6b, and the pickup unit 6b is fixed at the position for replacing the paper feed roller 12. FIGS. 7C and 7D are views of FIGS. 9A and 9B viewed from the rear in the paper feeding direction of the pickup unit 6b. FIG. 9 shows the positional relationship between the second hook 42 and the pickup unit 6b. FIG. 9A corresponds to the state of FIG. 8A, and when the pickup unit 6b is rotated in the direction of arrow G as shown in FIG. 8B , the pickup unit is shown in FIG. 9B. The second hook 42 is inserted into the hook hole 22f of 6b, and the pickup unit 6b is fixed at the position for replacing the paper feed roller 12. FIGS. 7C and 7D are views of FIGS. 9A and 9B viewed from the rear in the paper feeding direction of the pickup unit 6b.
[0038] [0038]
From the state of FIGS. 9B and 9D, the replacement operation of the paper feed roller 12 is started. First, as shown in FIG. 1A, the locking claw 21b of the pickup roller holding member 21 is moved in the direction of arrow A in the figure to release the locking with the locking claw 22b of the paper feed roller holding member 22. Next, as shown in FIG. 4B, the entire pickup roller holding member 21 is pulled out in the direction of the arrow B in the figure, and the shaft hole 21d is removed from the rotary shaft 13 through the open end 13b to remove the pickup roller holding member 21. . Then, as shown in FIG. 3C, the paper feed roller 12 is removed from the paper feed roller holding member 22, pulled out in the direction of arrow B in the figure, and removed from the rotary shaft 13 through the open end 13b. From the state of FIGS. 9B and 9D, the replacement operation of the paper feed roller 12 is started. First, as shown in FIG. 1A, the locking claw 21b of the pickup roller holding member 21 is moved in the direction of arrow A in the figure to release the locking with the locking claw 22b of the paper feed roller holding member 22. Next, as shown in FIG. 4B, the entire pickup roller holding member 21 is pulled out in the direction of the arrow B in the figure , and the shaft hole 21d is removed from the rotary shaft 13 through the open end 13b to remove the pickup roller holding member 21. Then, as shown in FIG. 3C, the paper feed roller 12 is removed from the paper feed roller holding member 22, pulled out in the direction of arrow B in the figure, and removed from the rotary shaft 13 through the open end 13b.
[0039] [0039]
Thus, according to the paper feeding device 6 of the present embodiment, the paper feeding roller 12 can be attached and detached independently. Accordingly, since the sheet feeding roller 12 itself can be replaced when the sheet feeding roller 12 is replaced, the cost for the replacement can be kept low. Further, when the paper feed roller 12 is attached to or detached from the rotating shaft 13, it can be removed and attached from the open end 13 b of the non-supporting portion 13 a of the rotating shaft 13, and a fixed object that supports the rotating shaft 13 at this time. The attachment and detachment is not hindered. As a result, the paper feed roller 12 can be easily replaced. Thus, according to the paper feeding device 6 of the present embodiment, the paper feeding roller 12 can be attached and detached independently. Accordingly, since the sheet feeding roller 12 itself can be replaced when the sheet feeding roller 12 is replaced, the cost for The replacement can be kept low. Further, when the paper feed roller 12 is attached to or detached from the rotating shaft 13, it can be removed and attached from the open end 13 b of the non-supporting portion 13 a of the rotating shaft 13, and a fixed object that supports the rotating shaft 13 at this time. The attachment and detachment is not hindered. As a result, the paper feed roller 12 can be easily replaced.
[0040] [0040]
Further, when replacing the paper feed roller 12, the pickup roller holding member 21 is removed from the paper feed roller holding member 22, and the paper feed roller 12 is removed from the paper feed roller holding member 22 and the rotary shaft 13 to obtain a new one. The paper feed roller 12 may be mounted in the reverse procedure. Therefore, when the pickup roller 11 is provided, the cost for replacing the paper feed roller 12 can be kept low while forming a unit having a simple configuration that is a combination with the paper feed roller 12. Further, when replacing the paper feed roller 12, the pickup roller holding member 21 is removed from the paper feed roller holding member 22, and the paper feed roller 12 is removed from the paper feed roller holding member 22 and the rotary shaft 13 to obtain a new one. The paper feed roller 12 may be mounted in the reverse procedure. Therefore, when the pickup roller 11 is provided, the cost for replacing the paper feed roller 12 can be kept low while forming a unit having a simple configuration that is a combination with the paper feed roller 12.
[0041] [0041]
Further, as shown in FIG. 10, a fitting insertion member 11 a parallel to the rotation shaft is provided around the rotation shaft at one end of the pickup roller 11, and a pickup roller mounting hole 21 e is provided in the roller holding plate 21 a of the pickup roller holding member 21. The pickup roller 11 can be detachably attached to the pickup roller holding member 21. In this case, the pickup roller 11 can be removed from the pickup roller holding member 21 removed as shown in FIG. 1B in the direction of arrow H in FIG. 10 and a new pickup roller 11 can be attached. Therefore, the pick-up roller 11 that wears together with the paper feed roller 12 can also be replaced. Further, as shown in FIG. 10, a fitting insertion member 11 a parallel to the rotation shaft is provided around the rotation shaft at one end of the pickup roller 11, and a pickup roller mounting hole 21 e is provided in the roller holding plate 21 a of the pickup roller holding member 21. The pickup roller 11 can be detachably attached to the pickup roller holding member 21. In this case, the pickup roller 11 can be removed from the pickup roller holding member 21 removed as shown in FIG. 1B in the direction of arrow H in FIG. 10 and a new pickup roller 11 can be attached. Therefore, the pick-up roller 11 that wears together with the paper feed roller 12 can also be replaced.
In order to solve the above problems, a sheet feeding device according to the present invention includes a sheet storing unit that stores sheets, a sheet feeding roller that feeds sheets in the sheet storing unit, and the sheet feeding roller that rotates during sheet feeding. In the sheet feeding device having the sheet feeding roller driving unit, the sheet feeding roller is detachable independently. In order to solve the above problems, a sheet feeding device according to the present invention includes a sheet storing unit that stores sheets, a sheet feeding roller that feeds sheets in the sheet storing unit, and the sheet feeding roller that rotates during sheet feeding. In the sheet feeding device having the sheet feeding roller driving unit, the sheet feeding roller is detachable independently.
According to the above invention, the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced. Therefore, it is possible to provide a sheet feeding apparatus that can keep the cost for replacement low. According to the above invention, the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced. Therefore, it is possible to provide a sheet feeding apparatus that can keep the cost for replacement low.
Furthermore, in order to solve the above-described problem, the sheet feeding device according to the present invention is configured such that the rotation shaft of the sheet feeding roller is a side to which the rotation driving force from the sheet feeding roller driving unit is transmitted to the sheet feeding roller. The opposite side is a non-supporting portion that is not supported by a fixed object, and the paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion. Furthermore, in order to solve the above-described problem, the sheet feeding device according to the present invention is configured such that the rotation shaft of the sheet feeding roller is a side to which the rotation driving force from the sheet feeding roller driving unit is The opposite side is a non-supporting portion that is not supported by a fixed object, and the paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion.
According to the above invention, the rotary shaft extending to both ends of the paper feed roller is a non-supporting portion that is not supported by the fixed object on the side opposite to the side where the rotational driving force is transmitted from the paper feed roller driving portion. The rotating shaft is supported only on the side where the rotational driving force is transmitted. The paper feed roller is detachably provided on the rotating shaft through the open end of the non-supporting portion. Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment or removal is hindered by a fixed object that supports the rotating shaft. It never happens. As a result, the paper feed roller can be easily replaced. According to the above invention, the rotary shaft extending to both ends of the paper feed roller is a non-supporting portion that is not supported by the fixed object on the side opposite to the side where the rotational driving force is transmitted from the paper feed The rotating shaft is supported only on the side where the rotational driving force is transmitted. The paper feed roller is detachably provided on the rotating shaft through the open end of the non-supporting portion. Therefore, when the paper feed roller. is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft, and at this time, the attachment or removal is hindered by a fixed object that supports the rotating shaft. It never happens. As a result, the paper feed roller can be easily replaced.
Further, in order to solve the above problems, the paper feeding device of the present invention includes a pickup roller for taking out paper from the paper storage unit, and a paper feeding roller holding member to which the paper feeding roller is detachable and attached to the rotating shaft. And a pickup roller holding member that is detachably provided to hold the pickup roller and to be detachable from the paper feed roller holding member, and holds the paper feed roller and is attached to the rotating shaft. In the state of a roller unit in which the pickup roller holding member holding the pickup roller is attached to the roller holding member, a rotational driving force is transmitted from the paper feed roller driving unit to the pickup roller. The sheet picked up by the pickup roller is supplied to the downstream side. Further, in order to solve the above problems, the paper feeding device of the present invention includes a pickup roller for taking out paper from the paper storage unit, and a paper feeding roller holding member to which the paper feeding roller is detachable and attached to And a pickup roller holding member that is detachably provided to hold the pickup roller and to be detachable from the paper feed roller holding member, and holds the paper feed roller and is attached to the rotating shaft. In the state of a roller unit in which the pickup roller holding member holding the pickup roller is attached to the roller holding member, a rotational driving force is transmitted from the paper feed roller driving unit to the pickup roller. The sheet picked up by the pickup roller is supplied to the downstream side.
According to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the pickup roller holding member. The pickup roller holding member can be further attached to and detached from the paper supply roller holding member attached to the rotation shaft of the paper supply roller. The roller unit is configured with the pickup roller holding member holding the pickup roller attached to the paper supply roller holding member holding the paper supply roller and attached to the rotating shaft. A rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied downstream by the paper feed roller. According to the above invention, when the paper feed roller and the pickup roller are provided, the paper feed roller can be attached to and detached from the paper feed roller holding member, and the pickup roller can be attached to and detached from the pickup roller The pickup roller holding member can be further attached to and detached from the paper supply roller holding member attached to the rotation shaft of the paper supply roller. The roller unit is configured with the pickup roller holding member holding the pickup roller attached to A rotational driving force is transmitted from the paper feed roller drive unit, the paper is taken out from the paper storage unit, and the paper is supplied downstream by the paper supply roller holding member holding the paper supply roller and attached to the rotating shaft. the paper feed roller.
When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, etc., remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and replace the new paper feed roller. It can be installed in the following procedure. Therefore, in the case where the pickup roller is provided, the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration composed of a combination with the paper feed roller. When replacing the paper feed roller, remove the pickup roller holding member from the paper feed roller holding member, etc., remove the paper feed roller from the paper feed roller holding member and the rotating shaft, and replace the new paper feed roller. It Therefore, in the case where the pickup roller is provided, the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration composed of a combination with the paper feed roller.
Furthermore, in order to solve the above problems, the paper feeding device of the present invention is characterized in that the pickup roller is detachable from the pickup roller holding member. Furthermore, in order to solve the above problems, the paper feeding device of the present invention is characterized in that the pickup roller is detachable from the pickup roller holding member.
According to the above invention, since the pickup roller can be attached to and detached from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can also be replaced. According to the above invention, since the pickup roller can be attached to and detached from the pickup roller holding member, the pickup roller that wears together with the paper feed roller can also be replaced.
Furthermore, in order to solve the above-described problems, the paper feeding device according to the present invention is characterized in that the roller unit is rotatable around the rotation shaft. Furthermore, in order to solve the above-described problems, the paper feeding device according to the present invention is characterized in that the roller unit is developing around the rotation shaft.
According to the above invention, when replacing the paper feed roller, the image forming unit, which is often provided above the paper feeding device, is removed, and the pickup roller side is placed in the space where the image forming unit is provided. If the roller unit is rotated so as to move, the replacement work can be easily performed. Further, the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller. According to the above invention, when replacing the paper feed roller, the image forming unit, which is often provided above the paper feeding device, is removed, and the pickup roller side is placed in the space where the image forming unit is provided. The roller unit is rotated so as to move, the replacement work can be easily performed. Further, the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller.
In order to solve the above problems, a paper feeding device according to the present invention includes a pickup roller that picks up paper from a paper storage unit, a paper feeding roller that supplies the paper picked up by the pickup roller to the downstream side, and a paper supply roller. In a paper feeding device including a paper feed roller driving unit that rotationally drives the paper feed roller during paper, the pickup roller and the paper feed roller are provided in a replaceable manner, and the pickup roller is provided with the paper feed roller. A holding member attached to the rotating shaft forms a state of the paper feeding roller and the roller unit, and a rotational driving force from the paper feeding roller driving unit is applied to the pickup roller via an idle gear provided on the holding member. It is driven by being transmitted to an integrally provided gear, and is attached to and detached from the gear. In order to solve the above problems, a paper feeding device according to the present invention includes a pickup roller that picks up paper from a paper storage unit, a paper feeding roller that supplies the paper picked up by the pickup roller to the downstream side, In a paper feeding device including a paper feed roller driving unit that rotationally drives the paper feed roller during paper, the pickup roller and the paper feed roller are provided in a replaceable manner, and the pickup roller is provided with The paper feed roller. A holding member attached to the rotating shaft forms a state of the paper feeding roller and the roller unit, and a rotating driving force from the paper feeding roller driving unit is applied to the pickup roller via an idle gear provided on The holding member. It is driven by being transmitted to an appropriately provided gear, and is attached to and detached from the gear.
Furthermore, in the paper feeding device according to the present invention, the paper feeding roller is inserted into the rotating shaft that is rotationally driven by the paper feeding roller driving unit, and the paper feeding roller alone is attached and detached. You can also Furthermore, in the paper feeding device according to the present invention, the paper feeding roller is inserted into the rotating shaft that is rotationally driven by the paper feeding roller driving unit, and the paper feeding roller alone is attached and detached. You can also
[0042] [0042]
【The invention's effect】 [The invention's effect]
As described above, the sheet feeding device of the present invention is such that the sheet feeding roller is detachable independently. The rotation axis of the paper feed roller is a non-supporting portion that is not supported by a fixed object on the side opposite to the side to which the rotational driving force from the paper feed roller driving unit is transmitted to the paper feeding roller. A paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion, and a pickup roller for taking out the paper from the paper storage portion and the paper feeding roller are detachably attached to the rotating shaft. A feed roller holding member to be attached; and a pickup roller holding member that is detachably provided to hold the pickup roller while holding the pickup roller, and holds the feed roller to hold the rotating shaft. In a state of a roller unit in which a pickup roller holding member holding the pickup roller is attached to As described above, the sheet feeding device of the present invention is such that the sheet feeding roller is detachable independently. The rotation axis of the paper feed roller is a non-supporting portion that is not supported by a fixed object on the side opposite to A paper feed roller is detachably provided on the rotating shaft through an open end of the non-supporting portion, and a pickup roller for the side to which the rotational shaft driving force from the paper feed roller driving unit is transmitted to the paper feeding roller. taking out the paper from the paper storage portion and the paper feeding roller are detachably attached to the rotating shaft. A feed roller holding member to be attached; and a pickup roller holding member that is detachably provided to hold the pickup roller while holding the pickup roller, and holds the feed roller to hold the rotating shaft. In a state of a roller unit in which a pickup roller holding member holding the pickup roller is attached to the paper feed roller holding member attached to Rotational driving force from the feed roller driving portion is transmitted to the serial pickup roller, the feed roller feeds the sheet taken out by the pickup roller to the downstream It is a configuration. the paper feed roller holding member attached to Rotational driving force from the feed roller driving portion is transmitted to the serial pickup roller, the feed roller feeds the sheet taken out by the pickup roller to the downstream It is a configuration.
[0043] [0043]
Therefore, since the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced, it is possible to provide a sheet feeding apparatus that can keep the replacement cost low. Therefore, since the sheet feeding roller itself can be replaced when the sheet feeding roller is replaced, it is possible to provide a sheet feeding apparatus that can keep the replacement cost low.
[0045] [0045]
Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft. At this time, the attachment or removal is hindered by a fixed object that supports the rotating shaft. It is never done. As a result, there is an effect that the sheet feeding roller can be easily replaced. Therefore, when the paper feed roller is attached to or detached from the rotating shaft, it can be removed and attached from the open end of the non-supporting portion of the rotating shaft. At this time, the attachment or removal is hindered by a fixed object that supports the rotating shaft. It is never done. As a result, there is an effect that the sheet feeding roller can be easily replaced.
[0047] [0047]
Therefore, when replacing the paper feed roller, the pickup roller holding member is removed from the paper feed roller holding member, etc., and the paper feed roller is detached from the paper feed roller holding member and the rotating shaft, so that a new paper feed roller is obtained. Can be installed in the reverse order. Therefore, when the pickup roller is provided, there is an effect that the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration including a combination with the paper feed roller. Therefore, when replacing the paper feed roller, the pickup roller holding member is removed from the paper feed roller holding member, etc., and the paper feed roller is detached from the paper feed roller holding member and the rotating shaft, so that a new paper feed roller is obtained. Can be installed in the reverse order. Therefore, when the pickup roller is provided, there is an effect that the cost for replacing the paper feed roller can be kept low while forming a unit having a simple configuration including a combination with the paper feed roller.
[0048] [0048]
Further, as described above, the sheet feeding device of the present invention is configured such that the pickup roller can be attached to and detached from the pickup roller holding member. Further, as described above, the sheet feeding device of the present invention is configured such that the pickup roller can be attached to and detached from the pickup roller holding member.
[0049] [0049]
Therefore, it is possible to replace the pick-up roller that wears with the paper feed roller. Therefore, it is possible to replace the pick-up roller that wears with the paper feed roller.
[0050] [0050]
Furthermore, the sheet feeding device of the present invention has a configuration in which the roller unit can rotate around the rotation shaft as described above. Furthermore, the sheet feeding device of the present invention has a configuration in which the roller unit can rotate around the rotation shaft as described above.
[0051] [0051]
Therefore, when replacing the paper feed roller, if the roller unit is rotated so that the pickup roller side moves to the space where the image forming unit is removed with the image forming unit removed, the replacement work is facilitated. The effect that it can be performed is produced. Further, there is an effect that the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller. Therefore, when replacing the paper feed roller, if the roller unit is rotated so that the pickup roller side moves to the space where the image forming unit is removed with the image forming unit removed, the replacement work is facilitated. The effect that it can be performed is produced. Further, there is an effect that the pickup roller can be moved so as to contact the paper in the paper storage portion only when the paper is taken out from the paper storage portion by the pickup roller.
As described above, the image forming apparatus of the present invention includes the above-described sheet feeding device of the present invention. As described above, the image forming apparatus of the present invention includes the above-described sheet feeding device of the present invention.
[Brief description of the drawings] [Brief description of the drawings]
FIGS. 1A to 1C are perspective views illustrating a procedure for replacing a paper feed roller in a roller unit of a paper feed device according to an embodiment of the present invention. FIGS. 1A to 1C are perspective views illustrating a procedure for replacing a paper feed roller in a roller unit of a paper feed device according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a standby state of the roller unit of FIG. FIG. 2 is a perspective view illustrating a standby state of the roller unit of FIG.
FIG. 3 is a perspective view illustrating a state during feeding of the roller unit of FIG. FIG. 3 is a perspective view illustrating a state during feeding of the roller unit of FIG.
4 is a perspective view showing a peripheral configuration for setting the roller unit of FIG. 1 to the state of FIGS. 2 and 3. FIG. 4 is a perspective view showing a peripheral configuration for setting the roller unit of FIG. 1 to the state of FIGS. 2 and 3. FIG.
FIGS. 5A and 5B are side views for explaining the operation of the configuration in the vicinity of FIG. FIGS. 5A and 5B are side views for explaining the operation of the configuration in the vicinity of FIG.
6 is a perspective view for explaining a state when the roller unit of FIG. 1 is replaced with a paper feed roller. FIG. 6 is a perspective view for explaining a state when the roller unit of FIG. 1 is replaced with a paper feed roller. FIG.
7 is a perspective view showing a peripheral configuration for bringing the roller unit of FIG. 1 into the state shown in FIG. 6; 7 is a perspective view showing a peripheral configuration for bringing the roller unit of FIG. 1 into the state shown in FIG. 6;
FIGS. 8A and 8B are side views showing the positional relationship between a part of the peripheral configuration of FIG. 7 and a roller unit. FIGS. 8A and 8B are side views showing the positional relationship between a part of the peripheral configuration of FIG. 7 and a roller unit.
FIGS. 9A to 9D are side views showing the positional relationship between the roller unit and other portions of the peripheral configuration in FIG. 7; FIGS. 9A to 9D are side views showing the positional relationship between the roller unit and other portions of the peripheral configuration in FIG. 7;
10 is a perspective view for explaining a state in which a pickup roller is removed from the roller unit of FIG. 1. FIG. 10 is a perspective view for explaining a state in which a pickup roller is removed from the roller unit of FIG. 1. FIG.
FIG. 11 is a cross-sectional view illustrating a configuration of an image forming apparatus including a paper feeding device according to the present invention. FIG. 11 is a cross-sectional view illustrating a configuration of an image forming apparatus including a paper feeding device according to the present invention.
[Explanation of symbols] [Explanation of symbols]
6 Paper feeder 6 Paper feeder
6a Paper cassette (paper storage unit) 6a Paper cassette (paper storage unit)
6b Pickup unit (roller unit) 6b Pickup unit (roller unit)
11 Pickup roller 11 Pickup roller
12 Paper feed roller 12 Paper feed roller
13 Rotating shaft 13 Rotating shaft
13a Non-supporting part 13a Non-supporting part
13b Open end 13b Open end
14 Motor (paper feed roller drive) 14 Motor (paper feed roller drive)
21 Pickup roller holding member 21 Pickup roller holding member
22 Feeding roller holding member 22 Feeding roller holding member
P paper P paper

Claims (4)

  1. 用紙を収納する用紙収納部と、上記用紙収納部の用紙を給紙する給紙ローラと、給紙時に上記給紙ローラを回転駆動する給紙ローラ駆動部とを有する給紙装置において、
    上記給紙ローラが単独で着脱可能であり、
    上記給紙ローラの回転軸は、上記給紙ローラに対して上記給紙ローラ駆動部からの回転駆動力が伝達される側と反対側が固定物に支持されない非支持部となっており、上記給紙ローラが上記非支持部の開放端を介して上記回転軸に着脱可能に設けられ、
    上記用紙収納部から用紙を取り出すピックアップローラと、上記給紙ローラが着脱可能であって上記回転軸に取り付けられる給紙ローラ保持部材と、上記ピックアップローラを保持するとともに上記給紙ローラ保持部材と着脱可能に設けられたピックアップローラ保持部材とをさらに有し、上記給紙ローラを保持して上記回転軸に取り付けられた上記給紙ローラ保持部材に、上記ピックアップローラを保持したピックアップローラ保持部材が取り付けられてなるローラユニットの状態で、上記ピックアップローラに上記給紙ローラ駆動部から回転駆動力が伝達され、上記給紙ローラは上記ピックアップローラによって取り出された用紙を下流側へ供給することを特徴とする給紙装置。 A pickup roller that takes out paper from the paper storage unit, a paper feed roller holding member that is detachable and attached to the rotating shaft, and a paper feed roller holding member that holds the pickup roller and is attached to and detached from the paper feed roller holding member. A pickup roller holding member holding the pickup roller is attached to the paper feed roller holding member which further has a pickup roller holding member provided as possible and which holds the paper feed roller and is attached to the rotating shaft. In the state of the roller unit, the rotary driving force is transmitted from the paper feed roller drive unit to the pickup roller, and the paper feed roller supplies the paper taken out by the pickup roller to the downstream side. Paper feed device. In a paper feeding device having a paper storage part for storing paper, a paper supply roller for supplying paper in the paper storage part, and a paper supply roller driving part for rotationally driving the paper supply roller during paper supply, In a paper feeding device having a paper storage part for storing paper, a paper supply roller for supplying paper in the paper storage part, and a paper supply roller driving part for rotationally driving the paper supply roller during paper supply,
    The paper feed roller is detachable independently, The paper feed roller is detachable independently,
    The rotation axis of the paper feeding roller is a non-supporting portion that is not supported by a fixed object on the side opposite to the side where the rotational driving force from the paper feeding roller driving portion is transmitted to the paper feeding roller. A paper roller is detachably attached to the rotating shaft through the open end of the non-supporting portion; The rotation axis of the paper feeding roller is a non-supporting portion that is not supported by a fixed object on the side opposite to the side where the rotating driving force from the paper feeding roller driving portion is transmitted to the paper feeding roller. paper roller is detachably attached to the rotating shaft through the open end of the non-supporting portion;
    A pickup roller for picking up paper from the paper storage unit, a paper feed roller holding member to which the paper feed roller is detachable and attached to the rotating shaft, and a holder for holding the pickup roller and detaching from the paper feed roller holding member; And a pickup roller holding member that holds the pickup roller. The pickup roller holding member that holds the pickup roller is attached to the paper feed roller holding member that holds the paper feed roller and is attached to the rotating shaft. In the state of the roller unit thus formed, a rotational driving force is transmitted from the paper feed roller driving unit to the pickup roller, and the paper feed roller supplies the paper taken out by the pickup roller to the downstream side. Paper feeding device to be used. A pickup roller for picking up paper from the paper storage unit, a paper feed roller holding member to which the paper feed roller is detachable and attached to the rotating shaft, and a holder for holding the pickup roller and detaching from the paper feed roller holding And a pickup roller holding member that holds the pickup roller. The pickup roller holding member that holds the pickup roller is attached to the paper feed roller holding member that holds the paper feed roller and is attached to the rotating shaft. In the state of the roller unit thus formed, a rotational driving force is transmitted from the paper feed roller driving unit to the pickup roller, and the paper feed roller supplies the paper taken out by the pickup roller to the downstream side. Paper feeding device to be used ..
  2. 上記ピックアップローラは上記ピックアップローラ保持部材に着脱可能であることを特徴とする請求項1に記載の給紙装置。 The sheet feeding device according to claim 1, wherein the pickup roller is detachable from the pickup roller holding member.
  3. 上記ローラユニットが上記回転軸の回りに回動可能であることを特徴とする請求項1または2に記載の給紙装置。 The sheet feeding device according to claim 1, wherein the roller unit is rotatable about the rotation shaft.
  4. 請求項1〜3の何れか1項に記載の給紙装置を備えたことを特徴とする画像形成装置。An image forming apparatus comprising the paper feeding device according to claim 1.
JP2000243357A 2000-08-10 2000-08-10 Paper feeding device and image forming apparatus having the same Expired - Fee Related JP3632835B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964234A (en) * 2013-01-25 2014-08-06 京瓷办公信息系统株式会社 Sheet Conveyance Device, Document Conveyance Device, And Image Forming Apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005008291A (en) * 2003-06-16 2005-01-13 Sharp Corp Sheet material feeding device, image reader and image forming device
JP4838790B2 (en) * 2007-12-27 2011-12-14 株式会社沖データ Medium conveying device, paper feeding device, additional paper feeding device, and image forming device
JP5045802B2 (en) 2010-09-28 2012-10-10 ブラザー工業株式会社 Recording device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964234A (en) * 2013-01-25 2014-08-06 京瓷办公信息系统株式会社 Sheet Conveyance Device, Document Conveyance Device, And Image Forming Apparatus
CN103964234B (en) * 2013-01-25 2016-06-01 京瓷办公信息系统株式会社 Sheet conveying device, original document feeder and image processing system

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