JP5327525B2 - Recording paper transport device, image forming device - Google Patents
Recording paper transport device, image forming device Download PDFInfo
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- JP5327525B2 JP5327525B2 JP2009051280A JP2009051280A JP5327525B2 JP 5327525 B2 JP5327525 B2 JP 5327525B2 JP 2009051280 A JP2009051280 A JP 2009051280A JP 2009051280 A JP2009051280 A JP 2009051280A JP 5327525 B2 JP5327525 B2 JP 5327525B2
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Description
本発明は、用紙などの記録紙状記録媒体を搬送する記録紙搬送装置、及びこの給紙装置を備えた複写機、プリンタ、ファクシミリ、あるいはこれらの内の少なくとも２つの機能を備えた画像形成装置に関する。 The present invention relates to a recording paper conveying device for conveying a recording paper-like recording medium such as paper, and a copier, printer, facsimile equipped with the paper feeding device, or an image forming apparatus having at least two of these functions. About.
従来の画像形成装置における装置本体上方のスペースは、装置本体内の各機能モジュールを積上げて行くことにより決まっている。特に装置本体に給紙カセット部と手差し給紙部と両面搬送経路の組合せを備えた装置においては、本体給紙カセットと両面搬送経路は機内に配置し、ユーザーの利便性のために手差し給紙部は機外に突出するレイアウトが多々採用され、各搬送経路はお互いに干渉し合わないように配置しているが、各機能モジュールの使用時に干渉することも許されないという問題がある。しかし、各機能モジュールの小型化にも限界があり、各機能モジュールの配置にも大きな変更は出来ないという問題が発生していた。 The space above the apparatus main body in the conventional image forming apparatus is determined by stacking the functional modules in the apparatus main body. In particular, in an apparatus that has a combination of a paper feed cassette unit, a manual paper feed unit, and a double-sided conveyance path in the main body, the main body paper cassette and the double-sided conveyance path are arranged in the machine, and the manual paper feeding for the convenience of the user The parts often have a layout that protrudes outside the apparatus, and the transport paths are arranged so as not to interfere with each other. However, there is a problem that interference is not permitted when each functional module is used. However, there is a limit to miniaturization of each functional module, and there has been a problem that the layout of each functional module cannot be changed greatly.
また、装置本体上方のスペースは、各機能モジュールの配置及び動作範囲内でお互いが干渉し合わない位置関係を取るしかなく、装置本体の上方のスペースを拡大するうえ、装置を使用時に必ず無駄なスペースが発生していた。 In addition, the space above the device main body must be positioned so that they do not interfere with each other within the arrangement and operation range of each functional module. In addition to expanding the space above the device main body, it is always wasted when using the device. There was a space.
また、各機能モジュールの干渉を回避するために、手差し給紙部の積載トレイの一部を分割化し、閉時は外装となり、開時は本体給紙カセットと干渉しないように退避する構成があるが、部品点数も増え構成も複雑になり、さらには外部を分割するために無駄な外装の分割ラインが増え、装置本体のデザイン性に支障をきたす問題が発生していた。 In addition, in order to avoid interference between each functional module, there is a configuration in which a part of the stacking tray of the manual sheet feeding unit is divided and becomes an exterior when closed and retracts so as not to interfere with the main body sheet cassette when opened. However, the number of parts is increased and the configuration is complicated, and further, there is an increase in the number of useless exterior dividing lines for dividing the outside, which causes a problem that impairs the design of the apparatus main body.
そこで、例えば特許文献１では、手差し給紙の記録紙積載台の一部を伸縮可能にすることにより、手差し給紙の記録紙積載台が本体に収納する際のスペースを小さくしている。しかし、手差し給紙の記録紙積載台の使用時の干渉を避けることは出来ないため、開時の動作範囲が限定される結果、装置本体上方のスペースを小さくすることは出来ないうえ、手差し給紙の記録紙積載台の下方の無駄なスペースは残ったままになり、無駄なスペースの有効活用ができないという問題は解決できていない。 Therefore, for example, in Patent Document 1, a part of the manually fed recording paper stacking base is made extendable to reduce a space when the manually fed recording paper stacking base is stored in the main body. However, it is impossible to avoid interference when using the manual feed recording paper stack, and as a result, the operating range at the time of opening is limited. As a result, the space above the main unit cannot be reduced, and manual feeding is not possible. The useless space below the paper recording sheet stack remains, and the problem that the useless space cannot be effectively utilized has not been solved.
また、例えば特許文献２では、手差し給紙の記録紙積載台の一部を本体給紙カセットの取手部開口に差し込む構成にすることで、取手部が占有するスペースと手差し給紙の記録紙積載台が占有するスペースを共有することを実現可能にしている。しかし、手差し給紙の記録紙積載台の下方の無駄なスペースは残ったままになり、無駄なスペースの有効活用ができないという問題は解決できない。さらには、取手部が形状がユーザーに見え、手差し給紙部を使用時に本体給紙カセットを引き抜くことも可能になり、万が一、ユーザーが本体給紙カセットを装置本体から引き抜くと手差し給紙の記録紙積載台と本体給紙カセットの取手部開口部が抉り、装置本体が破損するという問題も発生してしまうようになっている。 Also, for example, in Patent Document 2, a configuration in which a part of a manually fed recording paper stacking table is inserted into a handle opening of a main body paper feed cassette, a space occupied by the handle and a manually fed recording paper stacking are arranged. This makes it possible to share the space occupied by the table. However, the wasteful space below the manually fed recording paper stacking table remains, and the problem that the wasteful space cannot be effectively used cannot be solved. In addition, the shape of the handle can be seen by the user, and it is possible to pull out the main paper cassette when using the manual paper feeder. If the user pulls out the main paper cassette from the main unit, manual feed recording is possible. There is also a problem that the opening of the handle portion of the paper stacking base and the main body paper feed cassette is turned up and the main body of the apparatus is damaged.
また、例えば特許文献３では、画像形成手段を着脱する際、開放される扉の開放に連動して第２の給送部を画像形成手段の着脱を邪魔しない位置に退避させることにより、装置本体上方のスペースを小さくしている。しかし、手差し給紙の記録紙積載台の下方の無駄なスペースは残ったままになり、無駄なスペースの有効活用ができないという問題は解決できていない。さらには、第２の給紙部を扉に連動するという非常に複雑な構成になるうえ、部品点数が多くなることにより、コストが高くなるという問題も発生していた。 Further, for example, in Patent Document 3, when the image forming unit is attached / detached, the second feeding unit is retracted to a position that does not obstruct the attachment / detachment of the image forming unit in conjunction with the opening of the door to be opened. The upper space is made smaller. However, the wasteful space below the manually fed recording paper stacking table remains, and the problem that the wasteful space cannot be effectively utilized has not been solved. Furthermore, there is a problem that the second paper feeding unit is very complicated to be interlocked with the door and the cost is increased due to the increase in the number of parts.
そこで本発明は、このような従来の問題点を解決するために、記録紙積載台を開時状態にした場合に従来のような配置では干渉してしまうカセット外装やカセットの取手部が退避して干渉しないようにすることが可能な記録紙搬送装置と、これを給紙部として備えた画像形成装置を提供することを目的とする。 Therefore, in order to solve such a conventional problem, the present invention retracts the cassette exterior and the cassette handle which interfere with the conventional arrangement when the recording paper stacking table is opened. It is an object of the present invention to provide a recording paper transport device that can prevent interference and an image forming apparatus that includes the recording paper transport device.
本発明の記録紙搬送装置のうち請求項１に係るものは、
記録紙を給送する第１給送手段と給送された記録紙を１枚に分離させる第１分離手段と記録紙を積載させる第１積載手段を備えた記録紙第１給紙部と、
前記記録紙第１給紙部と同一給紙ユニット内に構成され、記録紙を給送する第２給送手段を備えた記録紙第２給紙部と、
前記給紙ユニットの外装と、
前記記録紙第１給紙部を装置本体に着脱するために前記外装を操作する取手部と、
前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２積載手段とを有し、
前記外装と前記取手部が退避する退避手段と、
を有し、
前記第２積載手段が前記装置本体に対し移動することに連動して前記外装と前記取手部が退避可能としてなる、
ことを特徴とする。
Of the recording paper conveying apparatus of the present invention, the one according to claim 1 is
A recording paper first paper feed unit comprising a first feeding means for feeding the recording paper, a first separating means for separating the fed recording paper into one sheet, and a first stacking means for stacking the recording paper;
Configured on the recording paper identical feeding unit and the first feed unit, and the recording paper second feed unit having a second supply octenyl stage for feeding the recording paper,
And the armor of the sheet feeding unit,
A handle for operating the exterior to attach and detach the recording paper first paper supply unit to and from the apparatus body;
A second stacking unit for stacking the recording sheets of the recording sheet second sheet feeding unit attached to the apparatus main body,
A retraction means for retreating the exterior and the handle;
Have
The exterior and the handle can be retracted in conjunction with the movement of the second loading means relative to the apparatus body.
It is characterized by that.
請求項２に係るものは、請求項１記載の記録紙搬送装置において、前記退避手段が回動可能であり、前記外装に回動用の軸を有し、前記記録紙第２給紙部に回動用の軸を受ける受部を有することを特徴とする。 According to a second aspect of the present invention, in the recording paper transport apparatus according to the first aspect, the retracting means is rotatable, the exterior has a pivot shaft, and is rotated to the second recording paper feeding unit. It has the receiving part which receives the axis | shaft for a movement, It is characterized by the above-mentioned.
請求項３に係るものは、請求項１記載の記録紙搬送装置において、前記退避手段はスライド移動可能であり、前記外装にスライド移動用の凸部を有し、前記記録紙第２給紙部にスライド移動用の凸部を受ける凹部を有することを特徴とする。 According to a third aspect of the present invention, in the recording paper conveying apparatus according to the first aspect, the retracting means is slidable, and has a convex portion for sliding movement on the exterior, and the second recording paper feeding unit. It has a concave portion for receiving a convex portion for sliding movement.
請求項４に係るものは、請求項１記載の記録紙搬送装置において、前記退避手段は伸縮移動可能であり、前記外装が分割され、該分割された前記外装の一方の部材に伸縮移動用の凸部を有し、前記分割された一方の外装の部材と、前記分割された他方の外装の部材を伸縮移動可能とし、該他方の外装の部材に、前記伸縮移動用の凸部を受ける凹部を有することを特徴とする。 According to a fourth aspect of the present invention, there is provided the recording paper conveying apparatus according to the first aspect, wherein the retracting means is extendable and retractable, the exterior is divided, and one member of the divided exterior is expanded and contracted. A concave portion having a convex portion, wherein the divided one exterior member and the other divided exterior member can be expanded and contracted, and the other exterior member receives the convex portion for expansion and contraction movement. It is characterized by having.
請求項５に係るものは、請求項１記載の記録紙搬送装置において、前記退避手段を前記装置本体に対して脱着可能とし、前記外装に脱着用の凸部を有し、前記記録紙第２給紙部に前記脱着用の凸部を受ける凹部を有することを特徴とする。 According to a fifth aspect of the present invention, there is provided the recording paper conveying apparatus according to the first aspect, wherein the retracting means is detachable from the apparatus main body, the outer sheath has a detachable convex portion, and the recording paper second The paper feed part has a concave part for receiving the detachable convex part.
請求項６に係るものは、請求項１ないし５のいずれかに記載の記録紙搬送装置において、前記外装と前記第２給紙部を係合可能とし、前記外装に係合用の凸部を有し、前記記録紙第２給紙部に該係合用の凸部を受ける凹部を有することを特徴とする。 According to a sixth aspect of the present invention, in the recording paper conveyance device according to any one of the first to fifth aspects, the exterior and the second paper feed unit can be engaged with each other, and the exterior has a convex portion for engagement. The recording paper second paper feed section has a concave portion for receiving the convex portion for engagement.
請求項７に係るものは、請求項１ないし２ないし６のいずれかに記載の記録紙搬送装置において、前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段が前記装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、前記外装と前記第２給紙部の間にねじりコイルバネを配し、該ねじりコイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させることを特徴とする According to a seventh aspect of the present invention, in the recording paper conveyance device according to any one of the first to second to sixth aspects, the recording paper of the second recording paper feeding unit is loaded after the exterior and the handle portion are retracted. In conjunction with the movement of the second means to the standby position of the apparatus main body, the exterior and the handle can be moved to the standby position of the paper feed unit, and between the exterior and the second paper feed unit. A torsion coil spring is provided, and the exterior and the handle are moved to a standby position of the sheet feeding unit by a restoring force of the torsion coil spring.
請求項８に係るものは、請求項１ないし３または請求項４ないし６のいずれかに記載の記録紙搬送装置において、前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段を前記装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、前記外装と前記第２給紙部の間に引張りコイルバネを配し、該引張りコイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させることを特徴とする。 According to an eighth aspect of the present invention, in the recording paper transport apparatus according to any one of the first to third or fourth to sixth aspects, the recording of the second recording paper feeding unit after the exterior and the handle unit are retracted The exterior and the handle can be moved to the standby position of the paper feed unit in conjunction with the movement of the second means for stacking paper to the standby position of the apparatus main body. A tension coil spring is disposed between the sections, and the exterior and the handle are moved to a standby position of the sheet feeding unit by a restoring force of the tension coil spring.
請求項９に係るものは、請求項１ないし３または請求項４ないし６のいずれかに記載の記録紙搬送装置において、前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段を装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、前記外装と前記第２給紙部の間に圧縮コイルバネを配し、前記圧縮コイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させることを特徴とする。 According to a ninth aspect of the present invention, there is provided the recording paper conveying apparatus according to any one of the first to third or fourth to sixth aspects, wherein the recording and the recording paper second paper feeding unit are recorded after the exterior and the handle are retracted. The exterior and the handle can be moved to the standby position of the paper feed unit in conjunction with the movement of the second means for loading paper to the standby position of the apparatus main body. A compression coil spring is arranged between the two, and the exterior and the handle are moved to a standby position of the sheet feeding unit by a restoring force of the compression coil spring.
請求項１０に係るものは、請求項１ないし９のいずれかに記載の記録紙搬送装置において、前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段を前記装置本体に対し移動させることに連動して前記外装と前記取手部が退避する際に、前記記録紙を積載させる第２手段が前記外装に接触する部分が、上方から下方に傾斜した面を前記外装の上方に有することを特徴とする。 According to a tenth aspect of the present invention, in the recording paper conveying apparatus according to any one of the first to ninth aspects, the second means for stacking the recording paper of the second recording paper feeding unit attached to the apparatus main body is provided. When the exterior and the handle are retracted in conjunction with the movement with respect to the apparatus main body, the portion where the second means for loading the recording paper contacts the exterior has a surface inclined downward from above. It has over the said exterior, It is characterized by the above-mentioned.
請求項１１に係るものは、請求項１ないし１０のいずれかに記載の記録紙搬送装置において、前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段が前記装置本体に対し移動することに連動して前記外装と前記取手部が退避する際に、前記記録紙を積載させる第２手段が前記外装に接触する部分を表面の摩擦係数が低摩擦係数の部材で形成してなることを特徴とする。 According to an eleventh aspect of the present invention, in the recording paper transport apparatus according to any one of the first to tenth aspects, the second means for stacking the recording paper of the second recording paper feeding section attached to the apparatus main body is provided. When the exterior and the handle are retracted in conjunction with the movement with respect to the apparatus main body, the second means for stacking the recording paper has a low friction coefficient on the surface of the portion that contacts the exterior. It is formed by a member.
請求項１２に係るものは、請求項１ないし１１のいずれかに記載の記録紙搬送装置において、前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段が装置本体に対し移動することに連動して前記外装と前記取手部が退避する際に前記記録紙を積載させる第２手段が前記外装に接触する部分に回転可能なコロを保持する保持部を有し該保持部に回転可能なコロを保持してなることを特徴とする。 According to a twelfth aspect of the present invention, in the recording paper transport apparatus according to any one of the first to eleventh aspects, the second means for stacking the recording paper of the second recording paper feeding unit attached to the apparatus main body is provided. The second means for stacking the recording paper when the exterior and the handle are retracted in conjunction with the movement with respect to the apparatus main body has a holding portion for holding a rotatable roller at a portion in contact with the exterior. And a rotatable roller is held in the holding portion.
請求項１３に係る画像形成装置は、請求項１ないし１２のいずれかに記載の記録紙搬送装置を給紙装置として備えることを特徴とする。 According to a thirteenth aspect of the present invention, an image forming apparatus includes the recording paper conveyance device according to any one of the first to twelfth aspects as a paper feeding device.
請求項１４に係るものは、請求項１３の画像形成装置が、複写機、ファクシミリ、プリンタ、印刷機およびインクジェット記録装置、それらの少なくとも二つの機能を組み合わせた複合機のいずれかであることを特徴とする。 According to a fourteenth aspect of the present invention, the image forming apparatus according to the thirteenth aspect is any one of a copier, a facsimile machine, a printer, a printing machine, an ink jet recording apparatus, and a complex machine that combines at least two functions thereof. And
本発明によれば、手差し給紙部を使用時に手差し給紙の記録紙積載台を開時状態にすると、通常配置だと干渉するカセット外装やカセットの取手部が退避することにより、干渉を回避することが可能になる。また手差し給紙の記録紙積載台の下方は通常時は無駄なスペースであったが、その部分にカセット外装やカセットの取手部が収納されることにより、無駄なスペースを有効活用することが可能になり、装置本体上方のスペースを小さくすることのできる記録紙搬送装置を提供することが可能になる。さらには、無駄に外装を分割する必要性がなくなるため、デザイン性の自由度を向上させることが可能になる。 According to the present invention, when the manual paper feed unit is in use and the recording paper stacking table for manual paper feed is in the open state, interference is avoided by retracting the cassette exterior and the cassette handle part that interfere with normal placement. It becomes possible to do. In addition, the space below the manual feed recording paper stack was normally a wasteful space, but it is possible to effectively use the wasteful space by storing the cassette exterior and the handle of the cassette in that part. Thus, it is possible to provide a recording paper transport apparatus that can reduce the space above the apparatus main body. Furthermore, since there is no need to divide the exterior wastefully, it is possible to improve the degree of freedom in design.
以下本発明を実施するための最良の形態を、図に示す実施例を参照して説明する。なお本発明は図示の画像形成装置への実施には限定されず、画像形成を行う種々の装置に適用可能である。 The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings. The present invention is not limited to the illustrated image forming apparatus, and can be applied to various apparatuses that perform image formation.
図１は、像担持体の周上に１つの現像装置を配置した作像部が４つ並んだカラー画像形成装置の概略を示す断面図であり、画像形成装置本体３０に現像装置及び像担持体ユニットを装着した状態を示す。図１に基づいて、このカラー画像形成装置の主要部を説明する。 FIG. 1 is a cross-sectional view showing an outline of a color image forming apparatus in which four image forming units in which one developing device is arranged on the periphery of an image carrier, and the developing device and the image carrier are mounted on the image forming apparatus main body 30. The state where the body unit is mounted is shown. The main part of this color image forming apparatus will be described with reference to FIG.
カラー画像形成装置の略中央に４つの作像部が配置され、この下方に本体給紙部５８が配置されている。作像部の上方は、排紙収納部４５が形成され、画像形成された記録紙が排紙収納される。本体給紙部５８は、未使用の記録紙が収容される記録紙積載台５３が設けてあり、記録紙積載台５３は給紙ローラ５１を装置本体に残して、図１における右方向に着脱自在に配置される。 Four image forming units are arranged at substantially the center of the color image forming apparatus, and a main body paper supply unit 58 is arranged below the image forming unit. A paper discharge storage unit 45 is formed above the image forming unit, and the recording paper on which the image is formed is discharged and stored. The main body paper feed unit 58 is provided with a recording paper stacking base 53 for storing unused recording paper. The recording paper stacking base 53 is attached / detached in the right direction in FIG. Arranged freely.
また、本体給紙部５８において記録紙は給紙ローラ５１とフリクションパッド５２により１枚ずつ分離され、レジストローラ５０へと搬送され、記録紙の先端がレジストローラ５０に突き当たり、先端整合を行う。レジストローラ５０は記録紙の搬送を一時止め、中間転写ベルト４２のトナー像と記録紙の先端との位置関係が所定の位置になるよう、タイミングをとって回転が開始するよう、制御される。また、もう一つの給紙機構である手差し給紙部５９は、本体給紙部５８と一体に構成されているので、図１における右方向に着脱自在に配置される。 In the main body feeding unit 58, the recording sheets are separated one by one by the feeding roller 51 and the friction pad 52, conveyed to the registration roller 50, and the leading edge of the recording sheet hits the registration roller 50 to perform leading edge alignment. The registration roller 50 is controlled so as to start rotation at a timing so that the conveyance of the recording paper is temporarily stopped and the positional relationship between the toner image on the intermediate transfer belt 42 and the leading edge of the recording paper becomes a predetermined position. Further, the manual sheet feeding unit 59, which is another sheet feeding mechanism, is configured integrally with the main body sheet feeding unit 58, and is thus detachably disposed in the right direction in FIG.
また、手差し給紙部５９の記録紙積載台１、２は、２分割されており、片側の記録紙積載台１は、装置本体３０に残される。また、手差し給紙部５９において記録紙は給紙ローラ５６で給紙され、給紙ローラ５５とフリクションパッド５７により１枚ずつ分離され、レジストローラ５０へと搬送され、記録紙の先端がレジストローラ５０に突き当たり、先端整合を行う。 In addition, the recording paper stacking units 1 and 2 of the manual sheet feeding unit 59 are divided into two, and the recording paper stacking unit 1 on one side is left in the apparatus main body 30. In the manual paper feed unit 59, the recording paper is fed by the paper feeding roller 56, separated one by one by the paper feeding roller 55 and the friction pad 57, and conveyed to the registration roller 50. The leading edge of the recording paper is the registration roller. 50 is reached and tip alignment is performed.
レジストローラ５０は記録紙の搬送を一時止め、中間転写ベルト４２のトナー像と記録紙の先端との位置関係が所定の位置になるよう、タイミングをとって回転が開始するよう、制御される。 The registration roller 50 is controlled so as to start rotation at a timing so that the conveyance of the recording paper is temporarily stopped and the positional relationship between the toner image on the intermediate transfer belt 42 and the leading edge of the recording paper becomes a predetermined position.
そして、現像剤として夫々色の異なるトナーを収容した４つの現像器、これらの現像器と組み合わせて配置された像担持体ドラム３６〜３９を備えている。この像担持体ドラム３６〜３９の周りには１次転写後の残トナーを掻きとるクリーニングブレード（不図示）、像担持体ドラム３６〜３９に当接する帯電ローラ（不図示）が設けられている。これらを一体とした像担持体ユニット３２〜３５を構成している。この像担持体ユニット３２〜３５のハウジングは、現像装置を内蔵することができる構成となっている。 The image forming apparatus includes four developing units that store toners of different colors as developers, and image carrier drums 36 to 39 arranged in combination with these developing units. Around the image carrier drums 36 to 39, there are provided a cleaning blade (not shown) for scraping the residual toner after the primary transfer, and a charging roller (not shown) in contact with the image carrier drums 36 to 39. . The image carrier units 32 to 35 in which these are integrated are configured. The housings of the image carrier units 32 to 35 are configured to be able to incorporate a developing device.
また当接する駆動ローラ（不図示）、従動ローラ（不図示）と１次転写ロ−ラ（不図示）の周りに掛け渡されて循環移動する中間転写ベルト４２で構成された中間転写ユニット４１を備えている。各現像器の現像ローラの芯金にはバイアス電源（不図示）から交流と直流の重畳したマイナス電位のバイアス電圧が印加される。また各帯電ローラには他のバイアス電源から直流のマイナス電位のバイアス電圧が印加される。 An intermediate transfer unit 41 comprising an intermediate transfer belt 42 that circulates around a driving roller (not shown), a driven roller (not shown), and a primary transfer roller (not shown) that are in contact with each other is circulated. I have. A negative bias voltage in which alternating current and direct current are superimposed is applied from a bias power source (not shown) to the core of the developing roller of each developing device. Further, a DC negative potential bias voltage is applied to each charging roller from another bias power source.
上述の現像器と組み合う像担持体ドラム３６〜３９、この像担持体ドラム３６〜３９に当接するクリーニングブレード（不図示）及び帯電ローラ（不図示）によって画像形成部を形成し、第一画像形成部、第二画像形成部、第三画像形成部、は第四画像形成部というように、４個の画像形成部を持つ画像形成装置である。なお、上述のクリーニングブレ−ド（不図示）は像担持体ドラム３６〜３９の周面に残留するトナー汚れを清掃する。帯電ローラ（不図示）は清掃された像担持体ドラム３６〜３９の周面を一様な高電位に帯電させて初期化する。そして、この第１の画像形成部の像担持体ドラム３６にレーザビームが照射する。なお第２の画像形成部の像担持体ドラム３７にはレーザビームが照射する。 An image forming unit is formed by the image carrier drums 36 to 39 combined with the above-described developing device, a cleaning blade (not shown) in contact with the image carrier drums 36 to 39, and a charging roller (not shown). The second image forming unit, the second image forming unit, and the third image forming unit are image forming apparatuses having four image forming units, such as a fourth image forming unit. The above-described cleaning blade (not shown) cleans toner stains remaining on the peripheral surfaces of the image carrier drums 36 to 39. A charging roller (not shown) initializes the cleaned peripheral surfaces of the image carrier drums 36 to 39 to a uniform high potential. Then, a laser beam is applied to the image carrier drum 36 of the first image forming unit. The image carrier drum 37 of the second image forming unit is irradiated with a laser beam.
これにより、上述のように一様な高電位に帯電している像担持体ドラム３７の周面が画像データに基づき選択的に露光され、この露光により電位の減衰した低電位部と上記初期化による高電位部とからなる静電潜像が形成される。この動作を第四形成部まで行う。現像器は上記静電潜像の低電位部（又は高電位部）にトナーを転移させてトナー像を形成（現像）する。 As a result, the peripheral surface of the image carrier drum 37 charged to a uniform high potential as described above is selectively exposed based on the image data, and the low potential portion where the potential is attenuated by this exposure and the initialization are performed. An electrostatic latent image consisting of a high potential portion is formed. This operation is performed up to the fourth forming portion. The developing device forms (develops) a toner image by transferring toner to the low potential portion (or high potential portion) of the electrostatic latent image.
像担持体ドラム３６〜３９はトナー像を回転搬送して中間転写ベルト４２に転写する。この中間転写ベルト４２上の上記トナー像が像担持体ドラム３６との当接部に来るタイミングに合わせて、上記同様に第２の画像形成部が動作して、現像器が像担持体ドラム３７上の静電潜像をトナー像化（現像）し、像担持体ドラム３７がそのトナー像を回転搬送して中間転写ベルト４２上のトナー像に重ねて転写する。同様の動作を第四形成部まで行う。 The image carrier drums 36 to 39 rotate and convey the toner image and transfer it to the intermediate transfer belt 42. The second image forming unit operates in the same manner as described above in accordance with the timing at which the toner image on the intermediate transfer belt 42 comes into contact with the image carrier drum 36, and the developing device operates as the image carrier drum 37. The upper electrostatic latent image is converted into a toner image (development), and the image carrier drum 37 rotates and conveys the toner image and superimposes and transfers the toner image on the intermediate transfer belt 42. The same operation is performed up to the fourth forming portion.
上述の四重のトナー像を搬送し、そのトナー像を２次転写ロ−ラ４３により図示しない記録紙に転写する。その後、定着手段４７によって定着され、そして片面記録の場合には排出手段４６によって装置本体３０上面に形成した排出収納部４５に排出し、積載する。 The above-described quadruple toner images are conveyed, and the toner images are transferred onto a recording sheet (not shown) by the secondary transfer roller 43. Thereafter, the image is fixed by the fixing unit 47, and in the case of single-sided recording, the sheet is discharged and stacked in the discharge storage portion 45 formed on the upper surface of the apparatus main body 30 by the discharge unit 46.
両面記録を行う場合には、第一面の画像形成が終了した記録紙の後端が切り替え分岐点６０を通過した時点で反転手段である排出手段４６の搬送方向を反転させ、記録紙の先端と後端を入れ替えて両面搬送経路４８へと搬送する。そして記録紙は積載再給送路を通ってレジストローラ５０へと再び搬送され、第二面のトナー像を２次転写ロ−ラ４３により転写され、定着手段４７で定着された後に、排出手段４６により排出収納部４５に排出される。 When performing double-sided recording, when the trailing edge of the recording paper on which image formation on the first surface has finished passes through the switching branch point 60, the conveying direction of the discharging means 46, which is the reversing means, is reversed, and the leading edge of the recording paper Then, the rear end is exchanged and conveyed to the double-sided conveyance path 48. Then, the recording paper is conveyed again to the registration roller 50 through the stacking / refeeding path, and the toner image on the second surface is transferred by the secondary transfer roller 43 and fixed by the fixing unit 47, and then the discharging unit. 46 is discharged to the discharge storage portion 45.
図２〜１４により、本発明の実施例を詳細に説明する。なお以下の説明にあたり、図１５に示す従来の例をも参照して説明する。 The embodiment of the present invention will be described in detail with reference to FIGS. In the following description, description will be made with reference to the conventional example shown in FIG.
図１は、既述のように、退避手段が回動可能な構成における本実施例のカラー画像形成装置の概略を示す断面図であり、図２はその要部拡大断面図である。図３は図２の部分斜視図であり、図４は図３他方向から見た部分斜視図である。これらの図において、手差し給紙部５９から記録紙を給送している状態であり、手差し給紙部５９の記録紙積載台１は開時状態である。点線で記載されているのは手差し給紙部５９の記録紙積載台１は閉時状態であり、ユーザーの操作により手差し給紙部５９の記録紙積載台１は閉時状態から開時状態になる。 FIG. 1 is a cross-sectional view showing an outline of the color image forming apparatus according to the present embodiment in a configuration in which the retracting means is rotatable as described above, and FIG. 2 is an enlarged cross-sectional view of a main part thereof. 3 is a partial perspective view of FIG. 2, and FIG. 4 is a partial perspective view of FIG. 3 viewed from the other direction. In these drawings, the recording paper is fed from the manual paper feeding unit 59, and the recording paper stacking table 1 of the manual paper feeding unit 59 is in an open state. A dotted line indicates that the recording paper stacking table 1 of the manual paper feeding unit 59 is in a closed state, and the recording paper stacking table 1 of the manual paper feeding unit 59 is changed from a closed state to an open state by a user operation. Become.
上述の動作に連動し、本体給紙部５８と手差し給紙部５９を含む給紙ユニットの外装４は、手差し給紙部５９の記録紙積載台１の一部が、給紙ユニットの外装４の上方にある傾斜部３に接触し、図の右下方向の力を受け、給紙ユニットの側壁に設けられた凹部９に保持される外装４の回動支点５を中心に回動することにより、手差し給紙部５９の記録紙積載台１との干渉をさけ退避する。また、給紙ユニットの外装４に取り付けられた給紙ユニットの取手部６も一緒に退避する。給紙ユニットの外装４の上方にある傾斜部３があることにより、手差し給紙部５９の記録紙積載台１が引っかかることなく、スムーズに摺動し、退避することが可能になる。また、給紙ユニットの外装４の上方にある傾斜部３の表面は、摩擦係数の低いフッ素系樹脂、あるいはフッ素系コーティングなどが施された部材を活用することにより、更にスムーズに摺動し、退避することが可能になる。 In conjunction with the above-described operation, the paper feed unit exterior 4 including the main body paper feed unit 58 and the manual paper feed unit 59 is configured such that a part of the recording paper stacking table 1 of the manual paper feed unit 59 is the exterior 4 of the paper feed unit. Is in contact with the inclined portion 3 above and receives a force in the lower right direction in the figure, and rotates around the rotation fulcrum 5 of the exterior 4 held in the recess 9 provided in the side wall of the paper feeding unit. Thus, the interference between the manual paper feeding unit 59 and the recording paper stacking table 1 is avoided. Further, the handle 6 of the paper feed unit attached to the exterior 4 of the paper feed unit is also retracted together. By having the inclined portion 3 above the exterior 4 of the paper feeding unit, the recording paper stacking table 1 of the manual paper feeding portion 59 can be smoothly slid and retracted without being caught. Further, the surface of the inclined portion 3 above the exterior 4 of the paper feeding unit slides more smoothly by utilizing a fluorine resin having a low friction coefficient or a member coated with a fluorine coating, It becomes possible to evacuate.
図３と図４に示すロック爪７は、給紙ユニットの側壁に設けたロック爪保持部８と係合可能な構成である。手差し給紙部５９を未使用の状態では、ロック爪７とロック爪保持部８と係合している。また、実施例ではロック爪７は給紙ユニットの外装４と一体的に構成され、樹脂の弾性を活用したロック機構になっているが、別体化された板金などの弾性を活用した構成でも良い。給紙ユニットの本体給紙部５８に用紙補給などのために、給紙ユニットを装置本体３０より引き出す際は、図の右方向の力がロック爪７とロック爪保持部８が掛かるが、力の方向と接触部を直角方向にすることにより、外れにくい構成になっている。 The lock claw 7 shown in FIGS. 3 and 4 can be engaged with a lock claw holding portion 8 provided on the side wall of the paper feed unit. When the manual sheet feeding portion 59 is not used, the lock claw 7 and the lock claw holding portion 8 are engaged. In the embodiment, the lock claw 7 is formed integrally with the exterior 4 of the paper feed unit and is a lock mechanism that utilizes the elasticity of the resin. However, the lock claw 7 may be a structure that utilizes the elasticity of a separate sheet metal or the like. good. When the paper supply unit is pulled out from the apparatus main body 30 to supply paper to the main body paper supply unit 58 of the paper supply unit, the force in the right direction in the figure is applied to the lock claw 7 and the lock claw holding unit 8. By making the contact direction and the contact portion perpendicular to each other, it is difficult to come off.
上述の構成により、通常配置だと干渉する給紙ユニットの外装４や給紙ユニットの取手部６が退避することにより、干渉を回避することが可能になり、更には手差し給紙部５９の記録紙積載台１の下方は通常時は無駄なスペースであったが、その部分に給紙ユニットの外装４や給紙ユニットの取手部６が収納されることにより、無駄なスペースを有効活用することが可能になり、装置本体３０上方のスペースを小さくすることのできる記録紙搬送装置を提供することが可能になる。さらには、給紙ユニットと給紙ユニットの外装４を係合可能な構成にすることにより、給紙ユニットを引き出す際に給紙ユニットと給紙ユニットの外装４が不意に離間することなく、安定した操作を行うことが可能になり、ユーザーの操作性向上を達成することが可能になる。 With the above-described configuration, it is possible to avoid the interference by retracting the exterior 4 of the paper feed unit and the handle 6 of the paper feed unit that interfere with the normal arrangement, and further, the recording of the manual paper feed unit 59 can be avoided. The space below the paper loading table 1 is normally a wasteful space, but the wasteful space can be effectively used by storing the paper feed unit exterior 4 and the paper feed unit handle 6 in that portion. Accordingly, it is possible to provide a recording paper transport apparatus that can reduce the space above the apparatus main body 30. Furthermore, by adopting a configuration in which the paper feed unit and the exterior 4 of the paper feed unit can be engaged, the paper feed unit and the exterior 4 of the paper feed unit are not separated unexpectedly when the paper feed unit is pulled out. It is possible to perform the above-described operation, and it is possible to improve the operability for the user.
図５は退避手段がスライド移動可能な構成における本実施例のカラー画像形成装置の概略を示す要部拡大断面図であり、図６は図５の部分斜視図である。手差し給紙部５９から記録紙を給送している状態であり、手差し給紙部５９の記録紙積載台１は開時状態である。点線で記載されているのは手差し給紙部５９の記録紙積載台１は閉時状態であり、ユーザーの操作により手差し給紙部５９の記録紙積載台１は閉時状態から開時状態になる。 FIG. 5 is an enlarged cross-sectional view of a main part showing an outline of the color image forming apparatus of this embodiment in a configuration in which the retracting means is slidable, and FIG. 6 is a partial perspective view of FIG. The recording paper is being fed from the manual paper feeding unit 59, and the recording paper stacking table 1 of the manual paper feeding unit 59 is in an open state. A dotted line indicates that the recording paper stacking table 1 of the manual paper feeding unit 59 is in a closed state, and the recording paper stacking table 1 of the manual paper feeding unit 59 is changed from a closed state to an open state by a user operation. Become.
上述の動作に連動し、本体給紙部５８と手差し給紙部５９を含む給紙ユニットの外装４は、手差し給紙部５９の記録紙積載台１の一部が、給紙ユニットの外装４の上方にある傾斜部３に接触し、図の右下方向の力を受け、給紙ユニットの側壁に設けられた凹部１０に保持される外装４の支点１１を中心にスライド移動することにより、手差し給紙部５９の記録紙積載台１との干渉をさけ退避する。また、給紙ユニットの外装４に取り付けられた給紙ユニットの取手部６も一緒に退避する。そして、給紙ユニットの外装４の上方にある傾斜部３があることにより、手差し給紙部５９の記録紙積載台１が引っかかることなく、スムーズに摺動し、退避することが可能になる。 In conjunction with the above-described operation, the paper feed unit exterior 4 including the main body paper feed unit 58 and the manual paper feed unit 59 is configured such that a part of the recording paper stacking table 1 of the manual paper feed unit 59 is the exterior 4 of the paper feed unit. By sliding on the fulcrum 11 of the exterior 4 held in the recess 10 provided in the side wall of the sheet feeding unit by receiving the force in the lower right direction in the figure, The manual feed unit 59 is retracted to avoid interference with the recording paper stacking table 1. Further, the handle 6 of the paper feed unit attached to the exterior 4 of the paper feed unit is also retracted together. Since the inclined portion 3 is above the exterior 4 of the paper feed unit, the recording paper stacking table 1 of the manual paper feed portion 59 can be smoothly slid and retracted without being caught.
上述の構成により、通常配置だと干渉する給紙ユニットの外装４や給紙ユニットの取手部６が装置本体右下方に退避することにより、干渉を回避することが可能になり、装置本体３０上方のスペースを小さくすることのできる記録紙搬送装置を提供することが可能になる。 With the above-described configuration, the sheet feeding unit exterior 4 and the sheet feeding unit handle 6 that interfere with the normal arrangement are retracted to the lower right side of the apparatus main body, so that interference can be avoided. Therefore, it is possible to provide a recording paper transport apparatus that can reduce the space.
図７は退避手段が伸縮移動可能な構成における本実施例のカラー画像形成装置の概略を示す要部拡大断面図であり、図８、９は図７の部分斜視図であり、図８は手差し給紙部５９の記録紙積載台１が閉時状態であり、図９は手差し給紙部５９の記録紙積載台１が開時状態である。給紙ユニットの外装は、２分割されており、上外装１４と下外装１５で構成されている。また、上外装１４には給紙ユニットの取手６が取り付けられ、伸縮移動用のボス１２が内壁に設けられる構成になっている。また、下外装１５には伸縮移動用のスリット１３が設けられる構成になっており、上外装１４のボスと嵌合可能になっている。この状態は、手差し給紙部５９から記録紙を給送している状態であり、手差し給紙部５９の記録紙積載台１は開時状態である。点線で記載されているのは手差し給紙部５９の記録紙積載台１は閉時状態であり、ユーザーの操作により手差し給紙部５９の記録紙積載台１は閉時状態から開時状態になる。 FIG. 7 is an enlarged cross-sectional view of the main part showing an outline of the color image forming apparatus of this embodiment in a configuration in which the retracting means can be expanded and contracted, FIGS. 8 and 9 are partial perspective views of FIG. 7, and FIG. FIG. 9 shows a state in which the recording paper stacking table 1 of the manual paper feeding unit 59 is open. The exterior of the paper feed unit is divided into two parts, and is composed of an upper exterior 14 and a lower exterior 15. In addition, a handle 6 of a paper feeding unit is attached to the upper exterior 14 and a boss 12 for expansion and contraction movement is provided on the inner wall. In addition, the lower exterior 15 is configured to be provided with a slit 13 for expansion and contraction, and can be fitted to the boss of the upper exterior 14. This state is a state in which recording paper is fed from the manual paper feed unit 59, and the recording paper stacking table 1 of the manual paper feed unit 59 is in an open state. A dotted line indicates that the recording paper stacking table 1 of the manual paper feeding unit 59 is in a closed state, and the recording paper stacking table 1 of the manual paper feeding unit 59 is changed from a closed state to an open state by a user operation. Become.
上述の動作に連動し、本体給紙部５８と手差し給紙部５９を含む給紙ユニットの上外装１４は、手差し給紙部５９の記録紙積載台１の一部が、給紙ユニットの外装４の上方にある傾斜部３に接触し、図の下方向の力を受け、伸縮移動用のボス１２がスリット１３に嵌合し、図の下方向に伸縮移動することにより、手差し給紙部５９の記録紙積載台１との干渉をさけ退避する。また、給紙ユニットの外装４に取り付けられた給紙ユニットの取手部６も一緒に退避する。給紙ユニットの外装４の上方にある傾斜部３があることにより、手差し給紙部５９の記録紙積載台１が引っかかることなく、スムーズに摺動し、退避することが可能になる。 In conjunction with the above-described operation, the upper and outer surfaces 14 of the paper feeding unit including the main body paper feeding unit 58 and the manual paper feeding unit 59 are configured such that a part of the recording paper stacking table 1 of the manual paper feeding unit 59 is the exterior of the paper feeding unit. 4 is brought into contact with the inclined portion 3 located above 4, receives a downward force in the figure, the boss 12 for expansion and contraction is fitted into the slit 13, and expands and contracts in the downward direction in the figure, thereby manually feeding the paper feeding unit. Retracts from interference with 59 recording paper stacking bases 1. Further, the handle 6 of the paper feed unit attached to the exterior 4 of the paper feed unit is also retracted together. By having the inclined portion 3 above the exterior 4 of the paper feeding unit, the recording paper stacking table 1 of the manual paper feeding portion 59 can be smoothly slid and retracted without being caught.
図１０は退避手段が脱着可能な構成における本実施例のカラー画像形成装置の概略を示す要部拡大断面図であり、図１１は図１０の部分斜視図である。給紙ユニットの外装４には脱着保持用のボス１６が設けられ、給紙ユニットに保持用の受部１７が設けられ、ボス１６が受部１７に挿入されることにより、嵌合し保持される構成になっている。 FIG. 10 is an enlarged cross-sectional view of the main part showing an outline of the color image forming apparatus of the present embodiment in a configuration in which the retracting means is detachable, and FIG. 11 is a partial perspective view of FIG. A boss 16 for attaching and detaching is provided on the exterior 4 of the paper feeding unit, a receiving portion 17 for holding is provided on the paper feeding unit, and the boss 16 is inserted into the receiving portion 17 to be fitted and held. It is the composition which becomes.
この状態は、手差し給紙部５９から記録紙を給送している状態であり、手差し給紙部５９の記録紙積載台１は開時状態である。点線で記載されているのは手差し給紙部５９の記録紙積載台１は閉時状態であり、ユーザーの操作により手差し給紙部５９の記録紙積載台１は閉時状態から開時状態になる。 This state is a state in which recording paper is fed from the manual paper feed unit 59, and the recording paper stacking table 1 of the manual paper feed unit 59 is in an open state. A dotted line indicates that the recording paper stacking table 1 of the manual paper feeding unit 59 is in a closed state, and the recording paper stacking table 1 of the manual paper feeding unit 59 is changed from a closed state to an open state by a user operation. Become.
上述の動作に連動し、本体給紙部５８と手差し給紙部５９を含む給紙ユニットの外装４は、手差し給紙部５９の記録紙積載台１の一部が、給紙ユニットの外装４の上方にある傾斜部３に接触し、図の下方向の力を受け、脱着保持用のボス１６が保持用の受部１７から、離間し、図の右下方向に脱着移動することにより、手差し給紙部５９の記録紙積載台１との干渉を避けて退避する。また、給紙ユニットの外装４に取り付けられた給紙ユニットの取手部６も一緒に退避する。すなわち、給紙ユニットの外装４の上方にある傾斜部３があることにより、手差し給紙部５９の記録紙積載台１が引っかかることなく、スムーズに摺動し、退避することが可能になる。また、給紙ユニットの外装４や給紙ユニットの取手部６が装置本体に対し脱着可能な状態にすることにより、ユーザーは自由に給紙ユニットの外装４やカセットの給紙ユニットの取手部６が装置本体３０に対し、脱着した給紙ユニットの外装４を自由なスペースに保管することが可能になり、給紙ユニットの本体給紙部５８に用紙補給時のみや手差し給紙部５９の記録紙積載台１を収納状態にする時のみ取り付けることが可能になる。 In conjunction with the above-described operation, the paper feed unit exterior 4 including the main body paper feed unit 58 and the manual paper feed unit 59 is configured such that a part of the recording paper stacking table 1 of the manual paper feed unit 59 is the exterior 4 of the paper feed unit. The boss 16 for holding the attachment / detachment is separated from the receiving portion 17 for holding and moves in a detaching manner in the lower right direction of the drawing by contacting the inclined portion 3 located above and receiving the downward force of the drawing. The manual feed unit 59 is retracted while avoiding interference with the recording paper stacking base 1. Further, the handle 6 of the paper feed unit attached to the exterior 4 of the paper feed unit is also retracted together. That is, since the inclined portion 3 is above the exterior 4 of the paper feeding unit, the recording paper stacking table 1 of the manual paper feeding portion 59 can be smoothly slid and retracted without being caught. In addition, by allowing the sheet feeding unit exterior 4 and the sheet feeding unit handle 6 to be detachable from the apparatus main body, the user can freely attach the sheet feeding unit exterior 4 and the cassette sheet feeding unit handle 6. However, the exterior 4 of the paper feed unit attached to the apparatus main body 30 can be stored in a free space, and only when the paper is supplied to the main body paper feed unit 58 of the paper feed unit or when the manual paper feed unit 59 is recorded. It can be attached only when the paper stacking base 1 is put into the storage state.
図１２は退避手段が回動可能な構成における本実施例の部分斜視図である。外装４の回動支点５にねじりコイルばね１８を設け、ばねの取付部はそれぞれ外装４と給紙ユニットに設けられている。ねじりコイルばね１８力量は、給紙ユニットに対し、外装４が閉時状態になる様に設定されている。手差し給紙部５９の記録紙積載台１を開時状態から閉時状態にした際に、ねじりコイルばね１８の力量により、外装４が図の矢印方向に力を受け、閉時状態になる。 FIG. 12 is a partial perspective view of the present embodiment in a configuration in which the retracting means is rotatable. A torsion coil spring 18 is provided on the rotation fulcrum 5 of the exterior 4, and the spring mounting portions are provided on the exterior 4 and the paper feed unit, respectively. The amount of force of the torsion coil spring 18 is set so that the exterior 4 is in a closed state with respect to the paper feeding unit. When the recording paper stacking table 1 of the manual paper feed unit 59 is changed from the open state to the closed state, the exterior 4 receives a force in the direction of the arrow in the figure due to the amount of force of the torsion coil spring 18 and enters the closed state.
上述の構成により、手差し給紙部５９を使用後に手差し給紙部５９の記録紙積載台１を閉時状態にすると、給紙ユニットの外装４やカセットの取手部が戻し機構により、閉動作に連動して待機位置に戻り給紙ユニットの外装４や給紙ユニットの取手部６の戻し忘れを防止し、安定した操作を行うことが可能になり、ユーザーの操作性向上に繋がる。 With the above configuration, when the recording paper stacking base 1 of the manual paper feed unit 59 is closed after the manual paper feed unit 59 is used, the exterior 4 of the paper feed unit and the handle of the cassette are closed by the return mechanism. By interlockingly returning to the standby position, it is possible to prevent forgetting to return the exterior 4 of the paper feed unit and the handle 6 of the paper feed unit, and it is possible to perform a stable operation, which leads to an improvement in user operability.
図１３は退避手段が回動可能な構成における本実施例の部分斜視図である。引張コイルばね１９を設け、ばねの取付部はそれぞれ外装４と給紙ユニットに設けられている。引張コイルばね１９の力量は、給紙ユニットに対し、外装４が閉時状態になる様に設定されている。手差し給紙部５９の記録紙積載台１を開時状態から閉時状態にした際に、引張コイルばね１９の力量により、外装４が図の矢印方向に力を受け、閉時状態になる。 FIG. 13 is a partial perspective view of the present embodiment in a configuration in which the retracting means is rotatable. A tension coil spring 19 is provided, and spring mounting portions are provided on the exterior 4 and the paper feeding unit, respectively. The amount of force of the tension coil spring 19 is set so that the exterior 4 is in a closed state with respect to the paper feeding unit. When the recording paper stacking table 1 of the manual paper feed unit 59 is changed from the open state to the closed state, the exterior 4 receives a force in the direction of the arrow in the figure due to the amount of force of the tension coil spring 19 and enters the closed state.
上述の構成により、手差し給紙部５９を使用後に手差し給紙部５９の記録紙積載台１を閉時状態にすると、給紙ユニットの外装４や給紙ユニットの取手部６が戻し機構により、閉動作に連動して待機位置に戻り給紙ユニットの外装４や給紙ユニットの取手部６の戻し忘れを防止し、安定した操作を行うことが可能になり、ユーザーの操作性向上に繋がる。また、給紙ユニットの外装４の上方にある傾斜部３の表面より突出するようにコロ２０が外装４に設けられており、本体給紙部５８と手差し給紙部５９を含む給紙ユニットの外装４は、手差し給紙部５９の記録紙積載台１の一部が、コロ２０に接触し、更にスムーズに摺動し、退避することが可能になる。 With the above-described configuration, when the recording paper stacking base 1 of the manual paper feed unit 59 is closed after using the manual paper feed unit 59, the exterior 4 of the paper feed unit and the handle 6 of the paper feed unit are moved by the return mechanism. It returns to the standby position in conjunction with the closing operation, prevents forgetting to return the sheet feeding unit exterior 4 and the sheet feeding unit handle 6 and makes it possible to perform a stable operation, leading to improved operability for the user. In addition, a roller 20 is provided on the exterior 4 so as to protrude from the surface of the inclined portion 3 above the exterior 4 of the paper feed unit, and the paper feed unit including the main body paper feed unit 58 and the manual paper feed unit 59 is provided. The exterior 4 is configured such that a part of the recording paper stacking table 1 of the manual paper feeding unit 59 comes into contact with the roller 20 and slides more smoothly and can be retracted.
図１４は退避手段が回動可能な構成における本実施例の部分斜視図である。圧縮コイルばね２１を設け、ばねの取付部はそれぞれ上外装１４と下外装１５に設けられている。圧縮コイルばね２１の力量は、下外装１５に対し上外装１４が閉時状態になる様に設定されている。手差し給紙部５９の記録紙積載台１を開時状態から閉時状態にした際に、圧縮コイルばね２１の力量により、外装４が図の矢印方向に力を受け、閉時状態になる。 FIG. 14 is a partial perspective view of the present embodiment in a configuration in which the retracting means is rotatable. A compression coil spring 21 is provided, and spring mounting portions are provided on the upper exterior 14 and the lower exterior 15, respectively. The amount of force of the compression coil spring 21 is set so that the upper exterior 14 is in a closed state with respect to the lower exterior 15. When the recording paper stacking table 1 of the manual paper feed unit 59 is changed from the open state to the closed state, the exterior 4 receives a force in the direction of the arrow in the figure by the amount of force of the compression coil spring 21 and enters the closed state.
上述の構成により、手差し給紙部５９を使用後に手差し給紙部５９の記録紙積載台１を閉時状態にすると、給紙ユニットの上外装１４や給紙ユニットの取手部６が戻し機構により、閉動作に連動して待機位置に戻り給紙ユニットの外装４や給紙ユニットの取手部６の戻し忘れを防止し、安定した操作を行うことが可能になり、ユーザーの操作性向上に繋がる。 With the above-described configuration, when the recording paper stacking base 1 of the manual paper feed unit 59 is closed after the manual paper feed unit 59 is used, the upper / outer casing 14 of the paper feed unit and the handle unit 6 of the paper feed unit are moved by the return mechanism. Returning to the standby position in conjunction with the closing operation prevents forgetting to return the sheet feeding unit exterior 4 or the sheet feeding unit handle 6 and makes it possible to perform stable operations, leading to improved user operability. .
＜比較例＞
図１５は、上述したように、従来のカラー画像形成装置の一例の概略を示す断面図であり、像担持体の周上に１つの現像装置を配置した作像部が４つ並んだカラー画像形成装置の概略を示し、画像形成装置本体３０に現像装置及び像担持体ユニットを装着した状態を示す。画像形成に関わる基本構成などは図１と同じである。手差し給紙部５９から記録紙を給送している状態であり、手差し給紙部５９の記録紙積載台１は開時状態である。点線で記載されているのは手差し給紙部５９の記録紙積載台１は閉時状態であり、ユーザーの操作により手差し給紙部５９の記録紙積載台１は閉時状態から開時状態になる。
<Comparative example>
FIG. 15 is a cross-sectional view showing an outline of an example of a conventional color image forming apparatus as described above, and a color image in which four image forming units having one developing device arranged on the periphery of an image carrier are arranged. 1 schematically shows a forming apparatus, and shows a state where a developing device and an image carrier unit are mounted on an image forming apparatus main body 30. The basic configuration related to image formation is the same as in FIG. The recording paper is being fed from the manual paper feeding unit 59, and the recording paper stacking table 1 of the manual paper feeding unit 59 is in an open state. A dotted line indicates that the recording paper stacking table 1 of the manual paper feeding unit 59 is in a closed state, and the recording paper stacking table 1 of the manual paper feeding unit 59 is changed from a closed state to an open state by a user operation. Become.
上述の動作に連動し、手差し給紙部５９の記録紙積載台１の外装２２は、給紙ユニットの取手部６の上方に退避する構成になっているが、このような画像形成装置に上述してきた本発明の実施例を採用することで、既述のような課題を解決した画像形成装置の提供が可能となる。 In conjunction with the above-described operation, the exterior 22 of the recording paper stacking table 1 of the manual paper feed unit 59 is configured to be retracted above the handle unit 6 of the paper feed unit. By adopting the embodiment of the present invention, it is possible to provide an image forming apparatus that solves the problems as described above.
すなわち本発明は、手差し給紙部を使用時に手差し給紙の記録紙積載台を開時状態にすると、通常配置だと干渉するカセット外装やカセットの取手部が退避することにより、干渉を回避することが可能になり、更には手差し給紙の記録紙積載台の下方は通常時は無駄なスペースであったが、その部分にカセット外装やカセットの取手部が収納されることにより、無駄なスペースを有効活用することが可能になり、装置本体上方のスペースを小さくすることのできる記録紙搬送装置を提供することが可能になる。また、無駄に外装を分割する必要性がなくなるため、デザイン性の自由度が向上する記録紙搬送装置を提供することが可能になる。 That is, the present invention avoids interference by retracting the cassette exterior and the cassette handle which interfere with the normal layout when the manual feed recording paper stacking base is opened when the manual feed unit is in use. In addition, the space below the manually fed recording paper stack was normally a wasteful space, but the cassette exterior and the cassette handle are housed in that area, which creates a wasteful space. Can be effectively utilized, and it is possible to provide a recording paper transport apparatus that can reduce the space above the apparatus main body. In addition, since it is not necessary to divide the exterior in vain, it is possible to provide a recording paper transport device that improves the degree of freedom in design.
また、手差し給紙部を使用時に手差し給紙の記録紙積載台を開時状態にすると、カセット外装やカセットの取手部が装置本体に対し脱着可能な状態にすることにより、ユーザーは自由にカセット外装やカセットの取手部が装置本体に対し脱着した部材を自由なスペースに保管することが可能になり、本体給紙カセットに用紙補給時のみや手差し給紙部を収納状態にする時のみ取り付けることが可能になる。また、給紙ユニットと給紙ユニットの外装を係合可能な構成にすることにより、給紙ユニットを引き出す際に給紙ユニットと給紙ユニットの外装が不意に離間することなく、安定した操作を行うことが可能になり、ユーザーの操作性向上を達成することが可能になる。さらに、手差し給紙部を使用後に手差し給紙の記録紙積載台を閉時状態にすると、カセット外装やカセットの取手部が戻し機構により、閉動作に連動して待機位置に戻り、カセット外装やカセットの取手部の戻し忘れを防止し、安定した操作を行うことが可能になり、ユーザーの操作性向上に繋がる。 In addition, when the manual paper feed unit is in use and the manual feed recording paper stacking table is in the open state, the cassette exterior and cassette handle can be attached to and detached from the main body of the machine, allowing the user to freely insert the cassette. It is possible to store in a free space the parts where the exterior and cassette handles are attached to the main body of the machine, and attach them only when replenishing the main paper cassette or when the manual paper feeder is stored. Is possible. In addition, by adopting a configuration in which the paper feed unit and the exterior of the paper feed unit can be engaged, stable operation can be achieved without unintentionally separating the paper feed unit and the exterior of the paper feed unit when the paper feed unit is pulled out. This makes it possible to achieve improved user operability. Further, when the manual feed unit is used and the manual feed recording paper stacking table is closed, the cassette exterior and cassette handle are returned to the standby position in conjunction with the closing operation by the return mechanism. This makes it possible to prevent forgetting to return the cassette handle and to perform stable operations, leading to improved operability for the user.
また、外装と取手部が退避する際に手差し給紙の記録紙積載台が外装に接触する部分の摺動抵抗を低減することにより、ユーザーの操作力量の低減による操作性向上や部品ばらつきや環境依存による摺動抵抗の増加による操作性低減も防止することが可能になる。 In addition, by reducing the sliding resistance of the part where the manually fed recording paper stacking table comes into contact with the exterior when the exterior and the handle are retracted, the operability is improved by reducing the user's operational ability and the parts variation and environment It also becomes possible to prevent a reduction in operability due to an increase in sliding resistance due to dependence.
１、２：記録紙積載台
３：給紙ユニットの外装の傾斜部
４：給紙ユニットの外装
５：外装の回動支点
６：給紙ユニットの取手部
７：ロック爪
８：ロック爪保持部
９：凹部
１０：凹部
１１：外装の支点
１２：伸縮移動用のボス
１３：伸縮移動用のスリット
１４：上外装
１５：下外装
１６：脱着保持用のボス
１７：受部
１８：ねじりコイルばね
１９：引張コイルばね
２０：コロ
２１：圧縮コイルばね
３０：画像形成装置本体
３２〜３５：像担持体ユニット
３６〜３９：像担持体ドラム
４１：中間転写ユニット
４２：中間転写ベルト
４３：２次転写ロ−ラ
４５：排紙収納部
４６：排出手段
４７：定着手段
４８：両面搬送経路
５０：レジストローラ
５１：給紙ローラ
５２：フリクションパッド
５３：記録紙積載台
５６：給紙ローラ
５７：フリクションパッド
５８：本体給紙部
５９：手差し給紙部
６０：切り替え分岐点
1, 2: Recording paper stacking unit 3: Inclined portion of the exterior of the paper feed unit 4: Exterior of the paper feed unit 5: Rotation fulcrum of the exterior 6: Handle portion of the paper feed unit 7: Lock claw 8: Lock claw holding portion 9: Recess 10: Recess 11: Support fulcrum 12: Stretching boss 13: Stretching slit 14: Upper exterior 15: Lower exterior 16: Detachment holding boss 17: Receiving portion 18: Torsion coil spring 19 : Tension coil spring 20: roller 21: compression coil spring 30: image forming apparatus main bodies 32 to 35: image carrier units 36 to 39: image carrier drum 41: intermediate transfer unit 42: intermediate transfer belt 43: secondary transfer roller -La 45: Paper discharge storage section 46: Paper discharge means 47: Fixing means 48: Double-sided conveyance path 50: Registration roller 51: Paper feed roller 52: Friction pad 53: Recording paper stacking table 56: Paper feed roller 57: Friction Head 58: the main body sheet feeding section 59: manual paper feed unit 60: switching branch point
Claims (14)
前記記録紙第１給紙部と同一給紙ユニット内に構成され、記録紙を給送する第２給送手段を備えた記録紙第２給紙部と、
前記給紙ユニットの外装と、
前記記録紙第１給紙部を装置本体に着脱するために前記外装を操作する取手部と、
前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２積載手段とを有し、
前記外装と前記取手部が退避する退避手段と、
を有し、
前記第２積載手段が前記装置本体に対し移動することに連動して前記外装と前記取手部が退避可能としてなる、
ことを特徴とする記録紙搬送装置。
A recording paper first paper feed unit comprising a first feeding means for feeding the recording paper, a first separating means for separating the fed recording paper into one sheet, and a first stacking means for stacking the recording paper;
Configured on the recording paper identical feeding unit and the first sheet feeding unit, and the recording paper second feed unit having a second supply octenyl stage for feeding the recording paper,
And the armor of the sheet feeding unit,
A handle for operating the exterior to attach and detach the recording paper first paper supply unit to and from the apparatus body;
A second stacking unit for stacking the recording sheets of the recording sheet second sheet feeding unit attached to the apparatus main body,
A retraction means for retreating the exterior and the handle;
Have
The exterior and the handle can be retracted in conjunction with the movement of the second loading means relative to the apparatus body.
A recording paper conveying apparatus characterized by the above.
前記退避手段が回動可能であり、前記外装に回動用の軸を有し、
前記記録紙第２給紙部に回動用の軸を受ける受部を有する、
ことを特徴とする記録紙搬送装置。 The recording paper transport device according to claim 1,
The retracting means is pivotable, and has a pivot shaft on the exterior;
The recording paper second paper feeding unit has a receiving part for receiving a pivot shaft.
A recording paper conveying apparatus characterized by the above.
前記退避手段はスライド移動可能であり、前記外装にスライド移動用の凸部を有し、
前記記録紙第２給紙部にスライド移動用の凸部を受ける凹部を有する、
ことを特徴とする記録紙搬送装置。 The recording paper transport device according to claim 1,
The retracting means is slidable, and has a slide-moving convex portion on the exterior,
A concave portion for receiving a convex portion for sliding movement in the recording paper second paper feeding portion;
A recording paper conveying apparatus characterized by the above.
前記退避手段は伸縮移動可能であり、
前記外装が分割され、該分割された前記外装の一方の部材に伸縮移動用の凸部を有し、
前記分割された一方の外装の部材と、前記分割された他方の外装の部材を伸縮移動可能とし、
該他方の外装の部材に、前記伸縮移動用の凸部を受ける凹部を有する、
ことを特徴とする記録紙搬送装置。 The recording paper transport device according to claim 1,
The retracting means can be expanded and contracted,
The exterior is divided, and one member of the divided exterior has a convex part for expansion and contraction movement,
The divided one exterior member and the other divided exterior member can be expanded and contracted,
The other exterior member has a concave portion for receiving the convex portion for expansion and contraction movement.
A recording paper conveying apparatus characterized by the above.
前記退避手段を前記装置本体に対して脱着可能とし、
前記外装に脱着用の凸部を有し、
前記記録紙第２給紙部に前記脱着用の凸部を受ける凹部を有する、
ことを特徴とする記録紙搬送装置。 The recording paper transport device according to claim 1,
The retracting means is detachable from the apparatus main body,
Has a detachable projection on the exterior,
The recording paper second paper feed section has a recess for receiving the detachable projection,
A recording paper conveying apparatus characterized by the above.
前記外装と前記第２給紙部を係合可能とし、
前記外装に係合用の凸部を有し、
前記記録紙第２給紙部に該係合用の凸部を受ける凹部を有する、
ことを特徴とする記録紙搬送装置。 In the recording paper conveying apparatus according to any one of claims 1 to 5,
The exterior and the second paper feeding unit can be engaged,
The exterior has a convex part for engagement,
A concave portion for receiving the convex portion for engagement in the recording paper second paper feeding portion;
A recording paper conveying apparatus characterized by the above.
前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段が前記装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、
前記外装と前記第２給紙部の間にねじりコイルバネを配し、該ねじりコイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させる、
ことを特徴とする記録紙搬送装置。 In the recording paper conveying apparatus according to any one of claims 1 to 2,
After the exterior and the handle are retracted, the exterior and the handle are moved by the second means for loading the recording paper of the recording paper second paper feed unit to the standby position of the apparatus main body. It can be moved to the standby position of the paper unit,
A torsion coil spring is disposed between the exterior and the second sheet feeding unit, and the exterior and the handle unit are moved to a standby position of the sheet feeding unit by a restoring force of the torsion coil spring;
A recording paper conveying apparatus characterized by the above.
前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段を前記装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、
前記外装と前記第２給紙部の間に引張りコイルバネを配し、該引張りコイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させる、
ことを特徴とする記録紙搬送装置。 In the recording paper conveyance device according to any one of claims 1 to 3 or claims 4 to 6,
After the exterior and the handle are retracted, the exterior and the handle are moved by the second means for loading the recording paper of the recording paper second paper feed unit to the standby position of the apparatus main body. It can be moved to the standby position of the paper unit,
A tension coil spring is disposed between the exterior and the second sheet feeding unit, and the exterior and the handle unit are moved to a standby position of the sheet feeding unit by a restoring force of the tension coil spring.
A recording paper conveying apparatus characterized by the above.
前記外装と前記取手部が退避後に前記記録紙第２給紙部の記録紙を積載させる第２手段を装置本体の待機位置に移動させることに連動して前記外装と前記取手部が前記給紙ユニットの待機位置に移動可能であり、
前記外装と前記第２給紙部の間に圧縮コイルバネを配し、前記圧縮コイルバネの復元力により、前記外装と前記取手部を前記給紙ユニットの待機位置に移動させる、
ことを特徴とする記録紙搬送装置。 In the recording paper conveyance device according to any one of claims 1 to 3 or claims 4 to 6,
After the exterior and the handle are retracted, the exterior and the handle are moved to the standby position of the apparatus main body in conjunction with the movement of the second means for stacking the recording paper of the recording paper second paper feeder. Move to the standby position of the unit,
A compression coil spring is disposed between the exterior and the second sheet feeding unit, and the exterior and the handle unit are moved to a standby position of the sheet feeding unit by a restoring force of the compression coil spring;
A recording paper conveying apparatus characterized by the above.
前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段を前記装置本体に対し移動させることに連動して前記外装と前記取手部が退避する際に、前記記録紙を積載させる第２手段が前記外装に接触する部分が、上方から下方に傾斜した面を前記外装の上方に有する、
ことを特徴とする記録紙搬送装置。 In the recording paper conveyance device according to any one of claims 1 to 9,
When the exterior and the handle are retracted in conjunction with moving the second means for stacking the recording paper of the recording paper second paper supply unit attached to the apparatus main body with respect to the apparatus main body, The portion where the second means for loading the recording paper comes into contact with the exterior has a surface inclined downward from above to the exterior.
A recording paper conveying apparatus characterized by the above.
前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段が前記装置本体に対し移動することに連動して前記外装と前記取手部が退避する際に、前記記録紙を積載させる第２手段が前記外装に接触する部分を表面の摩擦係数が低摩擦係数の部材で形成してなる、
ことを特徴とする記録紙搬送装置。 In the recording paper conveyance device according to any one of claims 1 to 10,
When the second means for stacking the recording paper of the recording paper second paper feeding unit attached to the apparatus main body moves with respect to the apparatus main body, The second means for stacking the recording paper is formed of a member having a low friction coefficient on the surface and a portion contacting the exterior.
A recording paper conveying apparatus characterized by the above.
前記装置本体に取り付けられた前記記録紙第２給紙部の記録紙を積載させる第２手段が装置本体に対し移動することに連動して前記外装と前記取手部が退避する際に前記記録紙を積載させる第２手段が前記外装に接触する部分に回転可能なコロを保持する保持部を有し、
該保持部に回転可能なコロを保持してなる、
ことを特徴とする記録紙搬送装置。 The recording paper transport device according to any one of claims 1 to 11,
When the second means for stacking the recording paper of the recording paper second paper feeding unit attached to the apparatus main body moves relative to the apparatus main body, the recording paper is retracted when the exterior and the handle are retracted. The second means for loading the holding portion has a holding portion for holding a rotatable roller in a portion in contact with the exterior,
Holding a rotatable roller in the holding part,
A recording paper conveying apparatus characterized by the above.
14. The image forming apparatus according to claim 13, wherein the image forming apparatus is any one of a copying machine, a facsimile machine, a printer, a printing machine, an ink jet recording apparatus, and a complex machine that combines at least two functions thereof.
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