JP4947696B2 - Rotating shaft support device - Google Patents

Rotating shaft support device Download PDF

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JP4947696B2
JP4947696B2 JP2006233903A JP2006233903A JP4947696B2 JP 4947696 B2 JP4947696 B2 JP 4947696B2 JP 2006233903 A JP2006233903 A JP 2006233903A JP 2006233903 A JP2006233903 A JP 2006233903A JP 4947696 B2 JP4947696 B2 JP 4947696B2
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bearing
rotating shaft
fitting
main
bearing fitting
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JP2008057616A5 (en
JP2008057616A (en
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成彦 伊藤
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Canon Finetech Nisca Inc
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Canon Finetech Nisca Inc
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本発明は、回転軸の軸受部材を装置機器本体の保持部材に取り付けるように構成された回転軸支持装置に関する。   The present invention relates to a rotating shaft support device configured to attach a bearing member of a rotating shaft to a holding member of an apparatus apparatus main body.

従来より、多種多様な装置機器において、回転軸を回転自在に支持する軸受部材を機器本体の保持部材に固定して取り付ける構成になされた回転軸支持装置が広く採用されている。このような回転軸支持装置においては、例えば下記の特許文献1の開示内容を表した図22に示されているように、長尺状の回転軸1の軸方向両端部分が略中空円筒状の軸受部材2,2により回転自在に支承されており、それらの各軸受部材2の各々が、図23にも示されているように、機器本体側に設けられた保持板3,3に貫通形成された支持穴部3a,3aの内部に挿通されることにより取り付けられている。   2. Description of the Related Art Conventionally, a rotating shaft support device having a configuration in which a bearing member that rotatably supports a rotating shaft is fixedly attached to a holding member of a device main body has been widely adopted in a wide variety of apparatus devices. In such a rotary shaft support device, for example, as shown in FIG. 22 showing the disclosure of Patent Document 1 below, both end portions in the axial direction of the long rotary shaft 1 have a substantially hollow cylindrical shape. The bearing members 2 and 2 are rotatably supported, and each of the bearing members 2 is formed through the holding plates 3 and 3 provided on the apparatus main body side as shown in FIG. It is attached by being inserted through the inside of the support holes 3a, 3a.

上述した軸受部材2の各々は、前記回転軸1が挿入される軸穴部2aを有する本体胴部2bを有しており、その本体胴部2bの外周面には、軸方向及び回転方向の双方に離間して一対の狭持凸部2c,2cが突設されている。そして、前記本体胴部2bが、図23中の矢印eのように前記保持板3の支持穴部3aの内部に向かって軸方向に挿通された後、図24中の矢印fのように回動されると、上述した一対の狭持凸部2c,2cどうしの軸方向間隔部分に前記保持板3が厚さ方向に挟持され、それによって前記軸受部材2が図25及び図26のように軸方向に固定される。それと同時に、前記軸受部材2の本体胴部2bの外周面から半径方向外方に突出した位置に配置された固定ピン2dが前記保持板3の固定穴3b内に嵌合され、それによって前記軸受部材2が回転方向に固定される構成になされている。   Each of the bearing members 2 described above has a main body barrel portion 2b having a shaft hole portion 2a into which the rotary shaft 1 is inserted, and an outer circumferential surface of the main body barrel portion 2b has an axial direction and a rotational direction. A pair of sandwiching protrusions 2c, 2c are provided so as to protrude from each other. Then, after the main body body 2b is inserted in the axial direction toward the inside of the support hole 3a of the holding plate 3 as indicated by an arrow e in FIG. 23, the body body 2b is rotated as indicated by an arrow f in FIG. When moved, the holding plate 3 is sandwiched in the thickness direction between the above-described pair of sandwiching projections 2c, 2c in the axial direction, whereby the bearing member 2 is as shown in FIGS. Fixed in the axial direction. At the same time, a fixing pin 2d disposed at a position projecting radially outward from the outer peripheral surface of the main body body 2b of the bearing member 2 is fitted into the fixing hole 3b of the holding plate 3, whereby the bearing The member 2 is configured to be fixed in the rotational direction.

このようにして保持板3に取り付けられた軸受部材2に対して、図27に示されているように、上述した回転軸1の軸端部分が矢印gのように軸方向にスライドするようにして挿入され、それによって前記回転軸1の軸端部分が軸受部材2に回転自在に支承されるようになっている。   As shown in FIG. 27, the shaft end portion of the rotating shaft 1 is slid in the axial direction as indicated by the arrow g with respect to the bearing member 2 attached to the holding plate 3 in this way. Thus, the shaft end portion of the rotary shaft 1 is rotatably supported by the bearing member 2.

ところが、例えば図28に示されているように、上述した回転軸1の軸端部以外の例えば軸方向略中央位置に軸受装着部1aが設けられている場合や、回転軸1に取り付けられた大径状の駆動ローラ4の近傍に軸受装着部1aが配置されている場合には、回転軸1に設けられている駆動ローラ4やその他の部材等が邪魔になって回転軸1を軸方向にスライドさせて軸受部材2に装着することができなくなってしまうことがある。   However, for example, as shown in FIG. 28, when the bearing mounting portion 1 a is provided at a substantially central position in the axial direction other than the shaft end portion of the rotating shaft 1 described above, or attached to the rotating shaft 1. When the bearing mounting portion 1a is disposed in the vicinity of the large-diameter driving roller 4, the driving roller 4 and other members provided on the rotating shaft 1 obstruct the rotating shaft 1 in the axial direction. It may not be possible to mount the bearing member 2 by sliding it.

さらに、例えば図29に示されているように、回転軸1に取り付けられた駆動ローラ4に対して、例えば紙搬送用のコロ部材5がバネ部材6等からの付勢力により圧接されている場合には、そのコロ部材5の圧接力によって回転軸1に撓みが発生してしまい、駆動ローラ4とコロ部材5との当接関係に偏り等を生じて、いわゆる用紙の斜行現象の原因となることがある。   Furthermore, for example, as shown in FIG. 29, when the roller member 5 for paper conveyance is pressed against the driving roller 4 attached to the rotating shaft 1 by the urging force from the spring member 6 or the like. In this case, the rotating shaft 1 bends due to the pressure contact force of the roller member 5, and the contact relationship between the driving roller 4 and the roller member 5 is biased, which is a cause of the so-called skewing phenomenon of the paper. May be.

特開特開2000−136823号公報JP-A-2000-136823

そこで本発明は、軸受部材を、回転軸の軸端部以外の位置に対して容易に装着することができるとともに、装置機器本体側に対して小さなスペース内で効率的に取り付けることができるようにした回転軸支持装置を提供することを目的とする。   Therefore, the present invention enables the bearing member to be easily attached to a position other than the shaft end portion of the rotating shaft, and can be efficiently attached to the apparatus equipment main body side within a small space. An object of the present invention is to provide a rotating shaft support device.

上記目的を達成するため本発明にかかる回転軸支持装置では、回転軸と、前記回転軸の軸端部とは異なる中間部に設けられたローラと、前記回転軸の前記中間部で且つ前記ローラの側部の所定位置において前記回転軸を回転可能に支持する軸支持部材であって、中空円筒体の周壁部の一部を周方向に分離するように切り欠かれた軸受破断部により前記回転軸を軸方向と略直行する方向に挿入可能とするための切欠き開口が形成された本体胴部と、前記本体胴部に一体に設けられたレバー部とを備える軸受部材と、前記軸受部材を前記軸方向と略直行する方向に挿入可能とするための切欠き開口が形成された軸受嵌合部を備え、前記軸受嵌合部により前記回転軸を支持した前記軸受部材を保持する保持部材と、を有し、前記本体胴部は弾性変形可能であって前記本体胴部に形成された前記切欠き開口の開口幅(Z)は、前記回転軸の外径寸法(Y)よりも小さく形成され(Z<Y)、また前記軸受嵌合部に形成された前記切欠き開口の開口幅(X)は、前記本体胴部の最大外径寸法(φV)より小さく且つ前記本体胴部の最小外径寸法(W)よりも大きく形成され(W<X<φV)、更に前記レバー部は、前記軸受部材を前記保持部材に固定する為の係合部を有し、前記保持部材は、前記軸受嵌合部の前記切欠き開口から前記本体胴部が前記軸受嵌合部に挿入された状態であって、前記軸受嵌合部の前記切欠き開口の開口幅(X)に前記本体胴部の前記最小外形寸法(W)が対向する位置関係で対面した状態から、前記軸受部材を回動方向に所定量回動させた位置で前記係合部と係合して前記軸受部材を固定する固定部を有する構成になされている。 In order to achieve the above object, in the rotating shaft support device according to the present invention, the rotating shaft, a roller provided at an intermediate portion different from the shaft end portion of the rotating shaft, the intermediate portion of the rotating shaft, and the roller A shaft support member that rotatably supports the rotating shaft at a predetermined position on the side of the shaft, and the rotation is performed by a bearing fracture portion that is cut out so as to separate a part of the peripheral wall portion of the hollow cylindrical body in the circumferential direction. A bearing member comprising: a main body barrel portion formed with a notch opening for enabling insertion of the shaft in a direction substantially perpendicular to the axial direction; and a lever portion provided integrally with the main body barrel portion; and the bearing member Is provided with a bearing fitting portion in which a notch opening is formed so as to be inserted in a direction substantially perpendicular to the axial direction, and a holding member that holds the bearing member that supports the rotating shaft by the bearing fitting portion. And the body trunk is elastically deformed The opening width (Z) of the notch opening formed in the body body is smaller than the outer diameter dimension (Y) of the rotating shaft (Z <Y), and the bearing fitting The opening width (X) of the notch opening formed in the part is formed to be smaller than the maximum outer diameter dimension (φV) of the main body trunk part and larger than the minimum outer diameter dimension (W) of the main body trunk part ( W <X <φV), and the lever portion further includes an engaging portion for fixing the bearing member to the holding member, and the holding member extends from the notch opening of the bearing fitting portion to the main body. A position in which the body portion is inserted into the bearing fitting portion, and the minimum external dimension (W) of the body body portion faces the opening width (X) of the notch opening of the bearing fitting portion. The bearing member is engaged with the engagement portion at a position where the bearing member is rotated by a predetermined amount in the rotation direction from the facing state. It has been made to the structure having a fixing portion for fixing the bearing member.

このような構成を有する回転軸支持装置によれば、回転軸の軸方向途中部分が、軸受部材に設けられた軸受破断部を通して軸方向と略直交する方向に押し込まれるようにして軸受部材に装着可能となるとともに、その回転軸が装着された軸受部材は、保持部材に設けられた軸受嵌合部内に軸方向と略直交する方向に押し込まれるようにして取り付けられるようになっている。   According to the rotating shaft support device having such a configuration, the intermediate portion of the rotating shaft in the axial direction is attached to the bearing member so as to be pushed in a direction substantially orthogonal to the axial direction through the bearing fracture portion provided in the bearing member. The bearing member to which the rotating shaft is attached is attached so as to be pushed into a bearing fitting portion provided in the holding member in a direction substantially orthogonal to the axial direction.

以上述べたように本発明にかかる回転軸支持装置は、軸受部材の一部を切り欠くようにして形成した軸受破断部を通して回転軸を軸方向と略直交する方向に押し込むようにして軸受部材内に装着可能とするとともに、その回転軸を装着した軸受部材を、前記保持部材の一部を切り欠くようにして形成した軸受嵌合部内に軸方向と略直交する方向に押し込むようにして挟持して取り付けるように構成したものであるから、回転軸の軸端部以外の位置に対して軸受部材を容易に装着することによって回転軸に発生する撓みを低減することができるとともに、回転軸支持装置を装置機器本体側に対して小さなスペース内で効率的に取り付けることができ、回転軸支持装置の信頼性を向上させつつ生産性を高めることができる。   As described above, the rotating shaft support device according to the present invention is configured so that the rotating shaft is pushed in a direction substantially perpendicular to the axial direction through a bearing fracture portion formed by cutting out a part of the bearing member. The bearing member having the rotating shaft mounted thereon is clamped by being pushed in a direction substantially perpendicular to the axial direction into a bearing fitting portion formed by cutting out a part of the holding member. Therefore, it is possible to reduce the bending generated in the rotating shaft by easily mounting the bearing member at a position other than the shaft end of the rotating shaft, and to support the rotating shaft support device. Can be efficiently attached in a small space to the apparatus main body, and productivity can be improved while improving the reliability of the rotary shaft support device.

以下、複写機の回転軸支持装置に対して本発明を適用した実施形態を図面に基づいて詳細に説明するが、まず図1に示されているように、画像形成装置としての複写機の全体構造を説明しておく。   Hereinafter, an embodiment in which the present invention is applied to a rotating shaft support device of a copying machine will be described in detail with reference to the drawings. First, as shown in FIG. 1, the entire copying machine as an image forming apparatus is shown. The structure will be explained.

図1に示されている複写機10の全体は、記録シートPに対して画像形成動作を行うプリンタ部(装置本体部)11と、そのプリンタ部11の上方位置に装備された画像読取装置12と、その画像読取装置12に対して原稿を自動的に供給する自動原稿供給装置(ADF)13とを備えている。   The copying machine 10 shown in FIG. 1 includes a printer unit (apparatus body unit) 11 that performs an image forming operation on a recording sheet P, and an image reading device 12 that is installed above the printer unit 11. And an automatic document feeder (ADF) 13 that automatically supplies a document to the image reading device 12.

そして、前記画像読取装置12において読み取られた原稿の画像情報は、プリンタ部(装置本体部)11内に配置されたコントローラ111に入力されることによりレーザビームスキャナ112に画像信号として供給され、当該レーザビームスキャナ112から射出される走査ビームが、図示矢印方向に回転駆動されつつ一次帯電器113により予め一様に帯電される感光体ドラム114に照射され、当該感光ドラム114の表面に静電潜像が形成される。感光体ドラム114の表面に形成された静電潜像は、現像装置115を通過する際に現像剤であるトナーを付着されることにより現像されたトナー像となる。   Then, the image information of the document read by the image reading device 12 is supplied to the laser beam scanner 112 as an image signal by being input to the controller 111 disposed in the printer unit (device main body unit) 11, and The scanning beam emitted from the laser beam scanner 112 is irradiated to the photosensitive drum 114 that is uniformly charged in advance by the primary charger 113 while being driven to rotate in the direction of the arrow shown in the figure, and the surface of the photosensitive drum 114 is charged with an electrostatic latent image. An image is formed. The electrostatic latent image formed on the surface of the photosensitive drum 114 becomes a toner image developed by attaching toner as a developer when passing through the developing device 115.

一方、前記感光体ドラム114の下方に配置されたシート供給カセット116の内部には、多数の記録材としての記録シートPが中板116a上に積載されるようにして格納されていて、シート供給ローラ116bの回転駆動により前記シート供給カセット116から送り出された記録シートPは、搬送ローラ対116cへ受け渡されてレジストローラ対116dに送り込まれていく。   On the other hand, in the sheet supply cassette 116 disposed below the photosensitive drum 114, a large number of recording sheets P as recording materials are stored so as to be stacked on the intermediate plate 116a. The recording sheet P sent out from the sheet supply cassette 116 by the rotational drive of the roller 116b is delivered to the conveying roller pair 116c and sent to the registration roller pair 116d.

前記レジストローラ対116dは、回転を停止している状態で記録シートPの先端を受け止めるように配置されており、記録シートPに適宜の撓みを形成させることによって前記記録シートPの斜行を修正して真っ直ぐな状態とする。その後、前記感光体ドラム114の回転とタイミングを合わせてレジストローラ対116dの回転が開始されると、前記記録シートPは、その先端が前記感光体ドラム114上のトナー像に合わせられるようにして転写器114aと感光体ドラム114との間の転写領域に送り込まれていき、前記転写器114aから付与される転写バイアスによって前記記録シートPが帯電されて感光体ドラム114側のトナー像が記録シートPへ転写される。   The registration roller pair 116d is arranged to receive the leading end of the recording sheet P in a state where the rotation is stopped, and corrects the skew of the recording sheet P by forming an appropriate deflection on the recording sheet P. And make it straight. Thereafter, when the rotation of the registration roller pair 116d is started in synchronism with the rotation of the photosensitive drum 114, the recording sheet P is adjusted so that the leading end thereof is aligned with the toner image on the photosensitive drum 114. The recording sheet P is fed into a transfer region between the transfer unit 114a and the photosensitive drum 114, and the recording sheet P is charged by a transfer bias applied from the transfer unit 114a, so that the toner image on the photosensitive drum 114 side is changed to a recording sheet. Transferred to P.

その転写領域から後方側(図示左方側)に向かって延びる搬送ベルト117は、上述したようにトナー像が転写された記録シートPを定着装置118に送り込むように配置されている。定着装置118には、加熱体を構成する定着フイルム118aが設けられているとともに、その定着フイルム118aの図示下面側に対して加圧ローラ118bがバネ等の適宜の付勢手段により圧接するように配置されていて、それら定着フイルム(加熱体)118aと加圧ローラ118bとの圧接部位に形成された定着ニップ領域内を記録シートPが通過させられ、当該定着ニップ領域において付与される加熱・加圧作用により前記記録シートP上のトナー像に対する定着処理が行われるようになっている。   The conveying belt 117 extending from the transfer area toward the rear side (the left side in the drawing) is arranged so as to send the recording sheet P on which the toner image is transferred to the fixing device 118 as described above. The fixing device 118 is provided with a fixing film 118a constituting a heating body, and the pressure roller 118b is pressed against the lower surface side of the fixing film 118a in the figure by an appropriate biasing means such as a spring. The recording sheet P is passed through the fixing nip region formed at the press contact portion between the fixing film (heating body) 118a and the pressure roller 118b, and the heating / heating applied in the fixing nip region is arranged. The fixing process for the toner image on the recording sheet P is performed by the pressure action.

また、定着作用により永久画像を形成された記録シートPは、羽根板状をなす排出トレイ119上に排出されていくが、定着後に感光体ドラム114の表面上に残されたトナーは、クリーナ114bの残トナー掻き落とし作用によって除去される。   Further, the recording sheet P on which a permanent image is formed by the fixing action is discharged onto a discharge tray 119 having a blade plate shape, but the toner remaining on the surface of the photosensitive drum 114 after fixing is the cleaner 114b. The residual toner is removed by scraping action.

このような複写機の搬送経路には、例えば図2及び図3に示されているような本発明の一実施形態にかかる回転軸支持装置が採用されている。   For example, a rotating shaft support device according to an embodiment of the present invention as shown in FIGS. 2 and 3 is employed in the conveyance path of such a copying machine.

すなわち、上述した記録シートPの搬送経路には、例えば図2及び図3に示されているような板状の紙ガイド部材20が配置されており、その紙ガイド部材20の紙搬送表面には、図示下方側から上方側に向かう紙搬送方向に沿って延在する多数の通紙リブ21が略平行に立設された状態で配置されている。それらの各通紙リブ21は、記録シートPの搬送案内機能を備えるように設けられたものであるが、それら複数の通紙リブ21のうちの一部の通紙リブ21は、長尺棒状の回転軸22を回転自在に支承する一対の軸受部材23,23に対する保持部材として構成されており、紙幅方向に適宜の間隔を離して配置された一対の通紙リブ21に対して軸受部材23がそれぞれ取り付けられている。この軸受部材23の取付け構造については後段において詳細に説明する。   That is, for example, a plate-shaped paper guide member 20 as shown in FIGS. 2 and 3 is arranged in the conveyance path of the recording sheet P described above, and on the paper conveyance surface of the paper guide member 20. A large number of paper passing ribs 21 extending in the paper conveying direction from the lower side to the upper side in the figure are arranged in a state of being erected substantially in parallel. Each of the sheet passing ribs 21 is provided so as to have a conveyance guide function for the recording sheet P, and some of the plurality of sheet passing ribs 21 are in the form of a long bar. The bearing member 23 is configured to be a holding member for the pair of bearing members 23 and 23 that rotatably support the rotary shaft 22 and is arranged with respect to the pair of paper passing ribs 21 that are arranged at an appropriate interval in the paper width direction. Are attached to each. The mounting structure of the bearing member 23 will be described in detail later.

上記各軸受部材23,23は、特に図4に示されているように、前記回転軸22の軸方向一端部分(図4の左端部分)及び軸方向略中央部分にそれぞれ形成された軸受支持部22a,22aに対して各々装着されており、それらの各軸受部材23,23の側部近傍には、前記回転軸22に固定された比較的大径状のゴムローラ24,24がそれぞれ配置されている。また、前記回転軸22の他端部分(図4の右端部分)は、当該他端部分に設けられた凸部22bを介して回転補助軸22cが接続されているとともに、その回転補助軸22cの先端部分に、装置本体側の駆動装置によって回転駆動される駆動ギヤ22dが接続されていることによって、前記回転軸22に紙搬送用の回転駆動力が伝達されるようになっている。   As shown in FIG. 4, the bearing members 23, 23 are respectively bearing support portions formed at one end portion in the axial direction (left end portion in FIG. 4) and the substantially central portion in the axial direction of the rotating shaft 22. Respectively large rubber rollers 24 and 24 fixed to the rotary shaft 22 are arranged in the vicinity of the side portions of the bearing members 23 and 23, respectively. Yes. In addition, the rotation auxiliary shaft 22c is connected to the other end portion (the right end portion in FIG. 4) of the rotation shaft 22 via a convex portion 22b provided at the other end portion, and the rotation auxiliary shaft 22c A driving gear 22d that is rotationally driven by a driving device on the apparatus main body side is connected to the tip portion, so that a rotational driving force for paper conveyance is transmitted to the rotary shaft 22.

さらに、上述した各軸受部材23は、特に図5に示されているように、中空状円筒体の一部切り欠いた形状の本体胴部23aを有している。すなわち、その軸受部材23の本体胴部23aには、当該本体胴部23aの周壁部の一部を周方向に分離させるように切欠き形成された軸受破断部23bが設けられており、その軸受破断部23bは、軸方向に沿って略直線状に延在する切欠き開口部を形成するように設けられている。この軸受部材23の軸受破断部23bにより形成される切欠き開口部は、本体胴部23aの接線方向に沿って適宜の幅Zを有しており、その切欠き開口幅Zが、軸受部材23の軸方向全長にわたって略一定となるように形成されている。   Further, each of the bearing members 23 described above has a main body barrel portion 23a having a shape in which a hollow cylindrical body is partially cut away, as shown in FIG. That is, the main body barrel portion 23a of the bearing member 23 is provided with a bearing fracture portion 23b that is notched so as to separate a part of the peripheral wall portion of the main body barrel portion 23a in the circumferential direction. The breaking portion 23b is provided so as to form a notch opening extending substantially linearly along the axial direction. The notch opening formed by the bearing fracture portion 23b of the bearing member 23 has an appropriate width Z along the tangential direction of the main body trunk portion 23a, and the notch opening width Z corresponds to the bearing member 23. It is formed so as to be substantially constant over the entire length in the axial direction.

そして、このような軸受破断部23bが軸受部材23に設けられていることによって当該軸受部材23の本体胴部23aが径方向に弾性変形可能となるように構成されており、図6に示されているように、上述した回転軸22の軸受支持部22a,22aが、前記軸受破断部23bを通して軸方向に略直交する矢印a方向に押し込まれるようにして軸受部材23の軸受内部側に装着されるようになっている。   Further, by providing such a bearing fracture portion 23b in the bearing member 23, the main body barrel portion 23a of the bearing member 23 is configured to be elastically deformable in the radial direction, which is shown in FIG. As described above, the bearing support portions 22a and 22a of the rotary shaft 22 described above are mounted on the bearing inner side of the bearing member 23 so as to be pushed through the bearing fracture portion 23b in the direction of the arrow a substantially orthogonal to the axial direction. It has become so.

このとき、前記軸受破断部23bにより形成される切欠き開口幅Zは、上述した回転軸22の軸受支持部22aにおける外径寸法Y(図14参照)よりも小さくなるように形成されており(Z<Y)、これによって前記回転軸22の外周面が軸受部材23の軸受破断部23bに押し付けられた際に(図6及び図14中の矢印a参照)、回転軸22の外周面によって軸受部材23の軸受破断部23bが幅方向(図14中の矢印b参照)に一旦押し広げられるように弾性変形し、それによって軸受部材23の軸受内部側に回転軸22が装着可能となる。また、回転軸22が装着された後には、軸受部材23の本体胴部23aが元の形状に弾性的に戻され、それによって上記回転軸22は軸受部材23から外方に抜け出すことなく保持されるようになっている。   At this time, the notch opening width Z formed by the bearing fracture portion 23b is formed to be smaller than the outer diameter Y (see FIG. 14) of the bearing support portion 22a of the rotary shaft 22 described above (see FIG. 14). Z <Y), whereby when the outer peripheral surface of the rotary shaft 22 is pressed against the bearing fracture portion 23b of the bearing member 23 (see arrow a in FIGS. 6 and 14), the bearing is supported by the outer peripheral surface of the rotary shaft 22. The bearing fracture portion 23b of the member 23 is elastically deformed so as to be once expanded in the width direction (see arrow b in FIG. 14), whereby the rotary shaft 22 can be mounted on the bearing inner side of the bearing member 23. Further, after the rotary shaft 22 is mounted, the main body body portion 23a of the bearing member 23 is elastically returned to its original shape, whereby the rotary shaft 22 is held without coming out of the bearing member 23. It has become so.

このような軸受部材23の本体胴部23aの外周面には、前述した従来技術で開示したものと同様に、軸方向及び回転方向の双方に離間して一対の狭持凸部23c,23cが設けられており、それら一対の狭持凸部23c,23cどうしの間に前記通紙リブ21に保持部材として設けられた軸受嵌合部(図7〜図21中の符号25参照)が厚さ方向に挟持され、それによって軸受部材23が軸方向に固定されるようになっている。また、前記本体胴部23aの外周面から半径方向外方に向かって突出するレバー部材23dの先端部分には凸状をなす固定ピン23eが軸方向に突出するように形成されており、その固定ピン23eが、前記通紙リブ21に保持部材として設けられた軸受嵌合部の軸受固定穴(図7〜図21中の符号251b参照)に嵌合されることによって、前記軸受部材23が回転方向に固定されるようになっている。これら各部材の嵌合関係について、以下詳細に説明することとする。   On the outer peripheral surface of the main body body portion 23a of the bearing member 23, a pair of sandwiching convex portions 23c and 23c are spaced apart in both the axial direction and the rotational direction, similar to the one disclosed in the prior art described above. A bearing fitting portion (see reference numeral 25 in FIGS. 7 to 21) provided as a holding member on the paper passing rib 21 between the pair of sandwiching convex portions 23c and 23c is provided with a thickness. The bearing member 23 is fixed in the axial direction. Further, a convex fixing pin 23e is formed so as to protrude in the axial direction at the distal end portion of the lever member 23d protruding outward in the radial direction from the outer peripheral surface of the main body barrel portion 23a. When the pin 23e is fitted in a bearing fixing hole (see reference numeral 251b in FIGS. 7 to 21) of a bearing fitting portion provided as a holding member on the paper passing rib 21, the bearing member 23 rotates. It is designed to be fixed in the direction. The fitting relationship between these members will be described in detail below.

まず、特に図7に示されているように、上述した回転軸22が配置された部位に位置する各通紙リブ21には、回転軸22及びゴムローラ24,24との接触・干渉を回避するため必要な凹状逃げ部21aが略半円状の切欠き形状をなすように形成されているとともに、上述した軸受部材23が取り付けられる部位に位置する各通紙リブ21には、軸受部材23を挟持可能とする軸受嵌合部25が略半円状の切欠き形状を備えるように形成されていて、その軸受嵌合部25の切欠き形状内に、上述した軸受部材23の本体胴部23aが押し込まれるようにして弾性的に挟持され、それによって軸受部材23が不動状態に固定されるようになっている。   First, as shown in FIG. 7 in particular, contact / interference between the rotating shaft 22 and the rubber rollers 24 and 24 is avoided in each of the paper passing ribs 21 located at the portion where the rotating shaft 22 is disposed. Therefore, the necessary concave relief portion 21a is formed so as to have a substantially semicircular cutout shape, and each of the paper passing ribs 21 located at the portion to which the above-described bearing member 23 is attached is provided with a bearing member 23. The bearing fitting portion 25 that can be clamped is formed so as to have a substantially semicircular cutout shape, and the main body barrel portion 23a of the bearing member 23 described above is formed in the cutout shape of the bearing fitting portion 25. The bearing member 23 is fixed in a non-moving state.

この軸受部材23を保持する部材として通紙リブ21に設けられた軸受嵌合部25は、図7〜図13に示されているように、通紙リブ21自体に一体的に設けられた第1の軸受嵌合部材251と、その第1の軸受嵌合部材251に対して軸方向(紙幅方向)に隣接して配置された第2の軸受嵌合部材252とにより形成されている。このように軸受嵌合部25を2部材に分けて構成したのは、型成型品からなる第1及び第2の軸受嵌合部材251,252の型抜き方向を異なる方向に設定することによって、上述した軸受嵌合部25を製造する際に使用する金型構造において一方向での型抜きを可能とするためであり、他の製造方法で可能であれば軸受嵌合部25を1部材として構成するようにしてもよい。   As shown in FIGS. 7 to 13, the bearing fitting portion 25 provided on the paper passing rib 21 as a member for holding the bearing member 23 is integrated with the paper passing rib 21 itself. The first bearing fitting member 251 and the second bearing fitting member 252 disposed adjacent to the first bearing fitting member 251 in the axial direction (paper width direction). In this way, the bearing fitting portion 25 is configured by dividing it into two members by setting the die-cutting directions of the first and second bearing fitting members 251 and 252 made of molded products in different directions. This is in order to enable die-cutting in one direction in the mold structure used when manufacturing the bearing fitting portion 25 described above, and if possible by another manufacturing method, the bearing fitting portion 25 is made one member. You may make it comprise.

上述した軸受嵌合部25を構成している第1の軸受嵌合部材251は、特に図8〜図11に示されているように、前記軸受部材23の本体胴部23aを前方側から受け入れ可能とする略U字状の切欠き保持溝251aを有しており、その切欠き保持溝251aの開口部を通して前記軸受部材23の本体胴部23aが切欠き保持溝251aの溝奥側に向かって挿通されるようになっている。この切欠き保持溝251aにおける溝奥側円弧状部の内径は、軸受部材23の本体胴部23aの最大外径寸法φV(図14及び図19参照)と略同一の寸法をなすように形成されており、それによって、前記軸受部材23の本体胴部23aが、第1の軸受嵌合部材251の切欠き保持溝251aの溝内部内に装着されるようになっている。   As shown in FIGS. 8 to 11, the first bearing fitting member 251 constituting the bearing fitting portion 25 described above receives the body body portion 23 a of the bearing member 23 from the front side. A substantially U-shaped notch holding groove 251a is provided, and the body 23a of the bearing member 23 is directed toward the groove rear side of the notch holding groove 251a through the opening of the notch holding groove 251a. It is designed to be inserted. The inner diameter of the arcuate portion on the back side of the notch holding groove 251a is formed so as to be substantially the same as the maximum outer diameter φV (see FIGS. 14 and 19) of the main body barrel 23a of the bearing member 23. Accordingly, the main body body portion 23a of the bearing member 23 is mounted in the groove inside of the notch holding groove 251a of the first bearing fitting member 251.

また、この第1の軸受嵌合部材251には、上述した切欠き保持溝251aの上方部位に軸受固定穴251bが、後方側から切り欠かれるようにして形成されており、その軸受固定穴251bに対して、前述した軸受部材23側の固定ピン23eが嵌合されるようになっている。   Further, the first bearing fitting member 251 is formed with a bearing fixing hole 251b in the upper portion of the above-described notch holding groove 251a so as to be cut out from the rear side, and the bearing fixing hole 251b. On the other hand, the fixing pin 23e on the bearing member 23 side described above is fitted.

一方、上述した第2の軸受嵌合部材252は、特に図8,図9,図12及び図13に示されているように、略嘴状をなすように形成された上下一対の凸部からなる規制片252a,252aが上下方向に適宜の間隔をなすようにして対向配置された構成になされており、それら上下一対の各規制片252a,252aの先端部分に設けられた鋭角突部252b,252bどうしの上下方向間隙が最も狭い部位を形成する構成になされている。すなわち、この上下一対の規制片252a,252aに設けられた鋭角突部252b,252bどうしの上下方向間隙は、上述した第1の軸受嵌合部材251の開口部よりもやや狭められた寸法をなすように設定されており、これらの両軸受嵌合部251,252を重ね合わせて構成した軸受嵌合部25全体としての開口幅Xを構成している。   On the other hand, the second bearing fitting member 252 described above is formed from a pair of upper and lower protrusions formed in a substantially bowl shape, as particularly shown in FIGS. 8, 9, 12 and 13. The restriction pieces 252a and 252a are arranged to face each other at an appropriate interval in the vertical direction, and the acute angle protrusions 252b provided at the tip portions of the pair of upper and lower restriction pieces 252a and 252a, The vertical gap between the 252b is configured to form the narrowest part. That is, the vertical gap between the acute angle protrusions 252b and 252b provided on the pair of upper and lower restricting pieces 252a and 252a has a size slightly narrower than the opening of the first bearing fitting member 251 described above. Thus, an opening width X as a whole of the bearing fitting portion 25 configured by superposing these both bearing fitting portions 251 and 252 is configured.

このとき、上述したように軸受部材23の本体胴部23aが第1の軸受嵌合部材251の切欠き保持溝251a内に装着される部位においての最大外径はφVになされているが(図14及び図19参照)、特に図5,図14及び図17に示されているように、前記軸受部材23の本体胴部23aの最小外径Wは、上述した前記軸受破断部23bの開口部を形成している本体胴部23aの両端縁部から、その軸受破断部23bの開口部と径方向に対向している前記本体胴部23aの外周面に至るまでのやや小さい寸法となっている(W<φV)。そして、その軸受部材23aの本体胴部23aの最小外径Wに対して、上述した軸受嵌合部25(第2の軸受嵌合部材252)の切欠き開口幅Xが、僅かに大きい寸法となるように形成されている(W<X)。   At this time, as described above, the maximum outer diameter at the portion where the main body 23a of the bearing member 23 is mounted in the notch holding groove 251a of the first bearing fitting member 251 is φV (see FIG. 14 and FIG. 19), in particular, as shown in FIG. 5, FIG. 14 and FIG. 17, the minimum outer diameter W of the body body 23a of the bearing member 23 is the opening of the bearing breakage 23b described above. Is slightly smaller from the both end edges of the body barrel 23a to the outer peripheral surface of the body barrel 23a that is radially opposed to the opening of the bearing fracture 23b. (W <φV). The notch opening width X of the bearing fitting portion 25 (second bearing fitting member 252) described above is slightly larger than the minimum outer diameter W of the main body barrel portion 23a of the bearing member 23a. (W <X).

その結果、軸受部材23の本体胴部23aが、特に図17中矢印cのように軸受嵌合部25の内部側に装着されるにあたって、上述した軸受部材23の本体胴部23aの最小外径Wが、軸受嵌合部25(第2の軸受嵌合部材252)の切欠き開口幅Xに対面するように配置されることにより、軸受部材23の本体胴部23aは軸受嵌合部25側に干渉することなく円滑に挿入されることとなる。   As a result, when the main body trunk portion 23a of the bearing member 23 is mounted on the inner side of the bearing fitting portion 25 particularly as indicated by an arrow c in FIG. 17, the minimum outer diameter of the main body trunk portion 23a of the bearing member 23 described above. By disposing W so as to face the notch opening width X of the bearing fitting portion 25 (second bearing fitting member 252), the body body portion 23a of the bearing member 23 is positioned on the bearing fitting portion 25 side. Will be inserted smoothly without interfering with.

そして、このような非干渉状態で軸受部材23の本体胴部23aが軸受嵌合部25に装着された後には、上述した鋭角突部252b,252bによって軸受部材23の本体胴部23aは、外方に抜け出ることのないように不動状態に保持され、前記軸受嵌合部25の内部側、つまり第1の軸受嵌合部材251の切欠き保持溝251aの溝奥側の部位に軸受部材23が押し込められた状態で挟持されることによって前記軸受部材23の外方への抜け出しが防止される。   Then, after the main body barrel portion 23a of the bearing member 23 is mounted on the bearing fitting portion 25 in such a non-interference state, the main body barrel portion 23a of the bearing member 23 is removed by the above-described acute protrusions 252b and 252b. The bearing member 23 is held in an immovable state so as not to slip out, and the bearing member 23 is located on the inner side of the bearing fitting portion 25, that is, on the inner side of the notch holding groove 251 a of the first bearing fitting member 251. By being pinched while being pushed in, the bearing member 23 is prevented from coming out outward.

このようにして軸受部材23が軸受嵌合部25の内部側に円滑に装着された後、上述したレバー部材23dが図18中の矢印dのように回動され、それによって軸受部材23の全体が図示時計回りに回動させられる。その結果、図19に示されているように、前記軸受部材23の本体胴部23aの最大径φVを有する外周面が、前記軸受嵌合部25の切欠き保持溝251aの溝内周面に押し当てられ、それによって軸受嵌合部25の内部側に軸受部材23の本体胴部23aが挟持されるようになっている。   After the bearing member 23 is smoothly mounted on the inner side of the bearing fitting portion 25 in this way, the lever member 23d described above is rotated as indicated by the arrow d in FIG. Is rotated clockwise in the figure. As a result, as shown in FIG. 19, the outer peripheral surface having the maximum diameter φV of the main body body portion 23 a of the bearing member 23 is the groove inner peripheral surface of the notch holding groove 251 a of the bearing fitting portion 25. The body body 23a of the bearing member 23 is clamped by the inner side of the bearing fitting portion 25 by being pressed.

また、軸受部材23が回動させられたときに、前述したレバー部材23dの固定ピン23eが軸受嵌合部25の軸受固定穴251b内に嵌合され、それによって前記軸受部材23が回転方向に固定されるようになっている。   Further, when the bearing member 23 is rotated, the fixing pin 23e of the lever member 23d described above is fitted into the bearing fixing hole 251b of the bearing fitting portion 25, whereby the bearing member 23 is rotated in the rotation direction. It is supposed to be fixed.

このような構成を有する各部材の組み付け手順をまとめて説明しておくと次のようになる。   The procedure for assembling each member having such a configuration will be described as follows.

まず、図6,図14及び図16に示されているように、上述した回転軸22の軸受支持部22a,22aに対して、軸受部材23の軸受破断部23bが矢印a方向に押し当てられ、それによって軸受部材23が矢印b方向に押し広げられるように弾性変形し、図15に示されているように、軸受部材23の軸受内部に回転軸22の軸受支持部22aが嵌り込んで回転軸22は軸受部材23により位置決めされる。   First, as shown in FIGS. 6, 14, and 16, the bearing fracture portion 23 b of the bearing member 23 is pressed against the bearing support portions 22 a and 22 a of the rotary shaft 22 in the direction of arrow a. Then, the bearing member 23 is elastically deformed so as to be expanded in the direction of the arrow b, and the bearing support portion 22a of the rotary shaft 22 is fitted into the bearing of the bearing member 23 and rotated as shown in FIG. The shaft 22 is positioned by the bearing member 23.

次に、図16に示されているように、上述したようにして軸受部材23に位置決めされ一体化された回転軸22が、保持部材としての軸受嵌合部25に組み付けされる。それにあたっては、まず図17に示されているように、上述した軸受部材23に位置決めされ一体化された回転軸22が矢印c方向に挿入される。このときには、軸受部材23の最小外径Wが軸受嵌合部25の切欠き開口幅Xに対向するように配置され(W<X)、それによって軸受部材23の本体胴部23aが軸受嵌合部25の内部側に円滑に挿入されることとなる。   Next, as shown in FIG. 16, the rotary shaft 22 positioned and integrated with the bearing member 23 as described above is assembled to the bearing fitting portion 25 as a holding member. In doing so, first, as shown in FIG. 17, the rotary shaft 22 positioned and integrated with the bearing member 23 described above is inserted in the direction of the arrow c. At this time, the minimum outer diameter W of the bearing member 23 is arranged so as to oppose the notch opening width X of the bearing fitting portion 25 (W <X), whereby the body body portion 23a of the bearing member 23 is fitted to the bearing fitting. It will be smoothly inserted into the inside of the portion 25.

このようにして軸受部材23が軸受嵌合部25の内部側に挿入された後に、図18の矢印d方向に軸受部材23が回動させられ、その軸受部材23の固定ピン23eが、図19に示されているように軸受嵌合部25の軸受固定穴251b内に嵌合されることによって軸受部材23が回転方向に位置決めされるとともに、特に図20及び図21に示されているように、軸受部材23の狭持凸部23c,23cが軸受嵌合部25が設けられた通紙リブ21を板厚方向に挟み込む。そのとき、軸受嵌合部25の開口幅Xが軸受部材23の本体胴部23aの最大外径寸法φVより小さく形成されていることから(X<φV)、軸受部材23の本体胴部23aは外方に抜け出ることなく不動状態に保持され、軸受部材23のスラスト方向への固定がなされる。   After the bearing member 23 is inserted into the bearing fitting portion 25 in this manner, the bearing member 23 is rotated in the direction of the arrow d in FIG. 18, and the fixing pin 23e of the bearing member 23 is moved to the position shown in FIG. As shown in FIG. 20, the bearing member 23 is positioned in the rotational direction by being fitted into the bearing fixing hole 251b of the bearing fitting portion 25, and particularly as shown in FIGS. The pinching protrusions 23c and 23c of the bearing member 23 sandwich the sheet passing rib 21 provided with the bearing fitting portion 25 in the plate thickness direction. At that time, since the opening width X of the bearing fitting portion 25 is formed to be smaller than the maximum outer diameter φV of the main body 23a of the bearing member 23 (X <φV), the main body 23a of the bearing member 23 is The bearing member 23 is held in an immobile state without slipping outward, and the bearing member 23 is fixed in the thrust direction.

このように本実施形態によれば、回転軸22の途中部分に設けられた軸受支持部22aが、軸受部材23に設けられた軸受破断部23bを通して軸方向と略直交する方向に押し込まれるようにして軸受部材23の内部に装着されるとともに、その回転軸22が装着された軸受部材23は、保持部材としての軸受嵌合部25に軸方向と略直交する方向に押し込まれるようにして容易かつ良好に取り付けられるようになっている。   As described above, according to the present embodiment, the bearing support portion 22a provided in the middle portion of the rotating shaft 22 is pushed in the direction substantially orthogonal to the axial direction through the bearing fracture portion 23b provided in the bearing member 23. The bearing member 23 mounted on the inside of the bearing member 23 and the rotating shaft 22 is easily and easily pushed into the bearing fitting portion 25 as a holding member in a direction substantially perpendicular to the axial direction. It comes to be attached well.

以上、本発明者によってなされた発明の実施形態を具体的に説明したが、本発明は上述した実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変形可能であることはいうまでもない。   The embodiments of the invention made by the present inventor have been specifically described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Not too long.

例えば、上述した各実施形態は、複写機の搬送経路に設けられた回転軸支持装置に対して本発明を適用したものであるが、複写機の他の部位や、プリンタ等の他の画像形成装置や、そのた多種多様な装置に対して本発明は同様に適用することができる。   For example, in each of the above-described embodiments, the present invention is applied to the rotary shaft support device provided in the conveyance path of the copying machine, but other parts of the copying machine and other image formation such as a printer are used. The present invention can be similarly applied to devices and a wide variety of devices.

以上述べたように本発明は、画像形成装置をはじめとして多種多様な装置における回転軸支持装置に対して広く適用することが可能なものである。   As described above, the present invention can be widely applied to the rotary shaft support device in various apparatuses including the image forming apparatus.

本発明を適用する画像形成装置の一例としての複写機の全体構成を表した縦断面説明図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal cross-sectional explanatory diagram illustrating an overall configuration of a copying machine as an example of an image forming apparatus to which the present invention is applied. 図1に示された複写機の搬送経路に設けられた本発明の一実施形態にかかる回転軸支持装置を有するガイド部材の全体構造を表した正面説明図である。FIG. 2 is an explanatory front view showing the entire structure of a guide member having a rotary shaft support device according to an embodiment of the present invention provided in the conveyance path of the copying machine shown in FIG. 1. 図2に示された回転軸支持装置を有するガイド部材の構造を表した外観斜視説明図である。It is an external appearance perspective explanatory drawing showing the structure of the guide member which has a rotating shaft support apparatus shown by FIG. 図3に示された回転軸支持装置に用いられている回転軸の一例を表した外観斜視説明図である。It is an external appearance perspective explanatory view showing an example of the rotating shaft used for the rotating shaft support apparatus shown by FIG. 図3に示された回転軸支持装置に用いられている軸受部材の構造を表したものであって、(a)及び(b)は外観斜視説明図、(c)は正面説明図、(d)は側面説明図である。3 shows the structure of a bearing member used in the rotating shaft support device shown in FIG. 3, wherein (a) and (b) are external perspective views, (c) are front explanatory views, and (d). ) Is a side view. 回転軸に対して本発明の一実施形態にかかる軸受部材を装着する際の状態を表した外観斜視説明図である。It is an external appearance perspective explanatory view showing the state at the time of mounting a bearing member concerning one embodiment of the present invention to a rotating shaft. 図2に示されたガイド部材の構造を表した外観斜視説明図である。FIG. 3 is an external perspective view illustrating the structure of the guide member shown in FIG. 2. 図2に示された回転軸支持装置を有するガイド部材に用いられている本発明の一実施形態における軸受嵌合部の構造を表したものであって、(a)及び(c)は左右側面説明図、(b)は正面説明図である。FIG. 3 shows a structure of a bearing fitting portion in an embodiment of the present invention used for a guide member having a rotating shaft support device shown in FIG. 2, wherein (a) and (c) are left and right side surfaces. Explanatory drawing and (b) are front explanatory drawings. 図8に示された軸受嵌合部の構造を表した外観斜視説明図である。It is an external appearance perspective explanatory view showing the structure of the bearing fitting part shown by FIG. 図8及び図9に示された軸受嵌合部を構成する第1の軸受嵌合部の構造を表した側面面説明図である。It is side surface explanatory drawing showing the structure of the 1st bearing fitting part which comprises the bearing fitting part shown by FIG.8 and FIG.9. 図10に示された第1の軸受嵌合部の構造を表した外観斜視説明図である。It is an external appearance perspective explanatory drawing showing the structure of the 1st bearing fitting part shown by FIG. 図8及び図9に示された軸受嵌合部を構成する第2の軸受嵌合部の構造を表した側面面説明図である。It is side surface explanatory drawing showing the structure of the 2nd bearing fitting part which comprises the bearing fitting part shown by FIG.8 and FIG.9. 図12に示された第2の軸受嵌合部の構造を表した外観斜視説明図である。It is an external appearance perspective explanatory view showing the structure of the 2nd bearing fitting part shown by FIG. 本発明の一実施形態にかかる軸受部材を回転軸に装着する際の状態を表した横断面説明図である。It is a cross-sectional explanatory drawing showing the state at the time of mounting | wearing the rotating shaft with the bearing member concerning one Embodiment of this invention. 本発明の一実施形態にかかる軸受部材を回転軸に装着した後の状態を表した横断面説明図である。It is a cross-sectional explanatory drawing showing the state after mounting | wearing the rotating shaft with the bearing member concerning one Embodiment of this invention. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に装着する状態を表した外観斜視説明図である。It is an appearance perspective explanatory view showing the state where the bearing member concerning one embodiment of the present invention is mounted in the bearing fitting part of a paper guide member. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に挿入しようとする状態を表した横断面説明図である。It is a cross-sectional explanatory drawing showing the state which is going to insert the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に挿入した直後の状態を表した横断面説明図である。It is a cross-sectional explanatory drawing showing the state immediately after inserting the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に装着完了した状態を表した横断面説明図である。It is a cross-sectional explanatory drawing showing the state which complete | finished mounting | wearing of the bearing member concerning one Embodiment of this invention to the bearing fitting part of a paper guide member. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に装着した後の状態を表した正面側の部分拡大斜視図である。It is the partial enlarged perspective view of the front side showing the state after mounting the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. 本発明の一実施形態にかかる軸受部材を紙ガイド部材の軸受嵌合部に装着した後の状態を表した背面側の部分拡大斜視図である。It is the partial expansion perspective view of the back side showing the state after mounting the bearing member concerning one embodiment of the present invention in the bearing fitting part of a paper guide member. 従来の回転軸支持装置において軸受部材を紙ガイド部材の軸受嵌合部に装着しようとする状態を表した背面側の部分拡大斜視図である。It is the partial enlarged perspective view of the back side showing the state which is going to mount | wear a bearing fitting part of a paper guide member in the conventional rotating shaft support apparatus. 従来の回転軸支持装置において軸受部材を紙ガイド部材の軸受嵌合部に装着した直後の状態を表した背面側の部分拡大斜視図である。It is the partial enlarged perspective view of the back side showing the state immediately after mounting the bearing member in the bearing fitting part of the paper guide member in the conventional rotating shaft support device. 従来の回転軸支持装置において軸受部材を紙ガイド部材の軸受嵌合部に装着完了した状態を表した背面側の部分拡大斜視図である。It is the partial expansion perspective view of the back side showing the state which completed mounting | wearing with the bearing fitting part of the paper guide member in the conventional rotating shaft support apparatus. 従来の回転軸支持装置において軸受部材を紙ガイド部材の軸受嵌合部に装着完了した状態を表した正面側の部分拡大斜視図である。It is the partial enlarged perspective view of the front side showing the state which complete | finished mounting | wearing with the bearing fitting part of the paper guide member in the conventional rotating shaft support apparatus. 従来の回転軸支持装置において軸受部材に対して回転軸を装着しようとしている状態を表した背面側の部分拡大斜視図である。It is the partial enlarged perspective view of the back side showing the state which is going to mount | wear with the rotating shaft with respect to a bearing member in the conventional rotating shaft support apparatus. 従来の回転軸支持装置において軸受部材に対して回転軸を装着した状態を表した背面側の部分拡大斜視図である。It is the partial enlarged perspective view of the back side showing the state which attached the rotating shaft with respect to the bearing member in the conventional rotating shaft support apparatus. 従来の回転軸支持装置に用いられている回転軸の一例を表した外観斜視説明図である。It is external appearance perspective explanatory drawing showing an example of the rotating shaft used for the conventional rotating shaft support apparatus. 従来の回転軸支持装置に用いられている回転軸が押圧された状態を表した外観斜視説明図である。It is an external appearance perspective explanatory view showing the state where the rotating shaft used for the conventional rotating shaft support device was pressed.

符号の説明Explanation of symbols

10 複写機(画像形成装置)
11 プリンタ部(プリンタ部)
12 画像読取装置
13 自動原稿供給装置(ADF)
P 記録シート
114 感光体ドラム
115 現像装置
116 シート供給カセット
117 搬送ベルト
119 排出トレイ
20 紙ガイド部材
21 通紙リブ
21a 凹状逃げ部
22 回転軸
22a 軸受支持部
22b 凸部
23 軸受部材
24 ゴムローラ
22c 回転補助軸
22d 駆動ギヤ
23a 本体胴部
23b 軸受破断部
23c 狭持凸部
23d レバー部材
23e 固定ピン
25 軸受嵌合部
251 第1の軸受嵌合部材
251a 切欠き保持溝
251b 軸受固定穴
252 第2の軸受嵌合部材
252a 規制片
252b 鋭角突部
10 Copying machine (image forming device)
11 Printer section (printer section)
12 Image reader 13 Automatic document feeder (ADF)
P recording sheet 114 photoconductor drum 115 developing device 116 sheet supply cassette 117 transport belt 119 discharge tray 20 paper guide member 21 paper feed rib 21a concave relief portion 22 rotating shaft 22a bearing support portion 22b convex portion 23 bearing member 24 rubber roller 22c rotation assist Shaft 22d Drive gear 23a Main body trunk portion 23b Bearing fracture portion 23c Nipping convex portion 23d Lever member 23e Fixing pin 25 Bearing fitting portion 251 First bearing fitting member 251a Notch holding groove 251b Bearing fixing hole 252 Second bearing Fitting member 252a Restriction piece 252b Acute angle protrusion

Claims (5)

回転軸と、A rotation axis;
前記回転軸の軸端部とは異なる中間部に設けられたローラと、A roller provided at an intermediate portion different from the shaft end portion of the rotating shaft;
前記回転軸の前記中間部で且つ前記ローラの側部の所定位置において前記回転軸を回転可能に支持する軸支持部材であって、中空円筒体の周壁部の一部を周方向に分離するように切り欠かれた軸受破断部により前記回転軸を軸方向と略直行する方向に挿入可能とするための切欠き開口が形成された本体胴部と、前記本体胴部に一体に設けられたレバー部とを備える軸受部材と、A shaft support member that rotatably supports the rotation shaft at a predetermined position on the intermediate portion of the rotation shaft and on a side portion of the roller, so as to separate a part of the peripheral wall portion of the hollow cylindrical body in the circumferential direction. A main body body portion in which a notch opening for allowing the rotation shaft to be inserted in a direction substantially perpendicular to the axial direction is formed by a bearing fracture portion notched in the lever, and a lever provided integrally with the main body body portion A bearing member comprising a portion;
前記軸受部材を前記軸方向と略直行する方向に挿入可能とするための切欠き開口が形成された軸受嵌合部を備え、前記軸受嵌合部により、前記回転軸を支持した前記軸受部材を保持する保持部材と、A bearing fitting portion formed with a notch opening for allowing the bearing member to be inserted in a direction substantially perpendicular to the axial direction, and the bearing member supporting the rotating shaft by the bearing fitting portion; A holding member to hold;
を有し、Have
前記本体胴部は弾性変形可能であって、前記本体胴部に形成された前記切欠き開口の開口幅(Z)は、前記回転軸の外径寸法(Y)よりも小さく形成され(Z<Y)、The main body body is elastically deformable, and an opening width (Z) of the notch opening formed in the main body body is smaller than an outer diameter (Y) of the rotating shaft (Z < Y),
また、前記軸受嵌合部に形成された前記切欠き開口の開口幅(X)は、前記本体胴部の最大外径寸法(φV)より小さく且つ前記本体胴部の最小外径寸法(W)よりも大きく形成され(W<X<φV)、An opening width (X) of the notch opening formed in the bearing fitting portion is smaller than a maximum outer diameter size (φV) of the main body barrel portion and a minimum outer diameter size (W) of the main body barrel portion. Larger than (W <X <φV),
更に、前記レバー部は、前記軸受部材を前記保持部材に固定する為の係合部を有し、前記保持部材は、前記軸受嵌合部の前記切欠き開口から前記本体胴部が前記軸受嵌合部に挿入された状態であって、前記軸受嵌合部の前記切欠き開口の開口幅(X)に前記本体胴部の前記最小外形寸法(W)が対向する位置関係で対面した状態から、前記軸受部材を回動方向に所定量回動させた位置で前記係合部と係合して前記軸受部材を固定する固定部を有することを特徴とする回転軸支持装置。Further, the lever portion includes an engaging portion for fixing the bearing member to the holding member, and the holding member is inserted into the body fitting portion from the notch opening of the bearing fitting portion. From the state of being inserted into the joint part and facing the opening width (X) of the notch opening of the bearing fitting part in a positional relationship in which the minimum external dimension (W) of the main body body part faces. A rotating shaft support device comprising: a fixing portion that engages with the engaging portion at a position where the bearing member is rotated by a predetermined amount in a rotating direction to fix the bearing member.
前記軸受嵌合部は、軸方向に隣接して設けられた第1及び第2の軸受嵌合部材により形成され、
前記第1の軸受嵌合部材には、前記軸受部材を受け入れ可能とした略U字状の切欠き保持溝が設けられているとともに、
前記第2の軸受嵌合部材には、前記第1の軸受嵌合部材の切欠き保持溝内に装着された軸受部材の抜け出しを防止する凸部からなる規制片が設けられていることを特徴とする請求項1記載の回転軸支持装置。
The bearing fitting portion is formed by first and second bearing fitting members provided adjacent to each other in the axial direction.
The first bearing fitting member is provided with a substantially U-shaped notch holding groove capable of receiving the bearing member,
The second bearing fitting member is provided with a regulation piece including a convex portion that prevents the bearing member mounted in the notch holding groove of the first bearing fitting member from coming out. The rotating shaft support device according to claim 1.
前記軸受嵌合部を形成している第1及び第2の軸受嵌合部材が型成形品からなり、 前記第1の軸受嵌合部材の型抜き方向と、前記第2の軸受嵌合部材の型抜き方向とが、異なる方向に設定されていることを特徴とする請求項2記載の回転軸支持装置。   The first and second bearing fitting members forming the bearing fitting portion are formed of a molded product, and the direction of mold release of the first bearing fitting member and the second bearing fitting member 3. The rotating shaft support device according to claim 2, wherein the direction of punching is set in a different direction. 前記本体胴部は、前記軸受嵌合部を軸方向に挟持して前記軸受部材を前記軸方向に固定するための一対の挟持凸部を有することを特徴とする請求項1記載の回転軸支持装置。 2. The rotating shaft support according to claim 1, wherein the main body body has a pair of clamping protrusions for clamping the bearing fitting portion in the axial direction and fixing the bearing member in the axial direction. apparatus. 前記一対の挟持凸部は、前記軸方向及び前記回動方向の双方に互いに離間して設けられていることを特徴とする請求項4記載の回転軸支持装置。 5. The rotating shaft support device according to claim 4, wherein the pair of sandwiching protrusions are provided apart from each other in both the axial direction and the rotation direction .
JP2006233903A 2006-08-30 2006-08-30 Rotating shaft support device Active JP4947696B2 (en)

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