JP3835880B2

JP3835880B2 - Bearing mechanism of rotating member

Info

Publication number: JP3835880B2
Application number: JP06725697A
Authority: JP
Inventors: 陽一柳橋
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 1997-03-05
Filing date: 1997-03-05
Publication date: 2006-10-18
Anticipated expiration: 2017-03-05
Also published as: JPH10246226A

Description

【０００１】
【発明の属する技術分野】
この発明は、たとえば複写機・ファクシミリ・プリンタやそれらの複合機などに適用し得る。詳しくは、そのような機器で用いる紙搬送ローラ等の回転部材を軸受を介して回転自在に支持する回転部材の軸受機構に関する。
【０００２】
【従来の技術】
従来、たとえば複写機では、用紙を搬送する紙搬送ローラを軸受を介して回転自在に支持していた。
【０００３】
【発明が解決しようとする課題】
ところが、このような紙搬送ローラおよび軸受は、永年の使用により摩耗するから、一定使用後は、新しいものと交換する必要があった。
【０００４】
そこで、この発明は、そのような紙搬送ローラ等の回転部材の寿命を長くし、耐久性を向上してランニングコストの低減を図るとともに、たとえばリサイクル使用を可能として製作コストの低減を図り、また近年の省資源化の要請に応えることを目的とする。
【００１１】
【課題を解決するための手段】
そのため、請求項１に記載の発明は、たとえば以下の図４および図５に示す実施の形態のように、
側板２０等の軸受保持部材で軸受部材２１を保持し、その軸受部材２１を介して紙搬送ローラ２３等の回転部材を回転自在に支持する回転部材の軸受機構において、
前記回転部材に第１軸部２３ａと第２軸部２３ｃを同軸に設けるとともに、
前記軸受部材２１を、第１軸受部２１ａを有する第１軸受部材２１Ｌと第２軸受部２１ｃを有する第２軸受部材２１Ｍとで構成し、
第１段目の使用状態では、前記第１軸受部材２１Ｌを前記軸受保持部材で保持して前記第１軸受部２１ａで前記第１軸部２３ａを受け、第２段目の使用状態では、前記第１軸受部材２１Ｌに取り付けた前記第２軸受部材２１Ｍを、その第１軸受部材２１Ｌを介して前記軸受保持部材で保持し、前記第１軸受部２１ａと同軸に設ける前記第２軸受部２１ｃで前記第２軸部２３ｃを受けてなる、ことを特徴とする。
【００１２】
そして、はじめ軸受保持部材で第１軸受部材２１Ｌを保持し、第１軸受部２１ａで回転部材の第１軸部２３ａを受けて第１段目の使用をし、それら第１軸受部２１ａおよび第１軸部２３ａが摩耗したとき次には軸受保持部材で第１軸受部材２１Ｌを介して第２軸受部材２１Ｍを保持し、その第２軸受部２１ｃで回転部材の第２軸部２３ｃを受けて第２段目の使用をする。
【００１３】
請求項２に記載の発明は、たとえば以下の図６および図７に示す実施の形態のように、
請求項１に記載の回転部材の軸受機構において、
第１段目の使用状態にあるとき、前記回転部材と係合しない状態で、前記第１軸受部材２１Ｌに取り付けた前記第２軸受部材２１Ｍを、その第１軸受部材２１Ｌを介して前記軸受保持部材で保持してなる、ことを特徴とする。
【００１４】
そして、軸受保持部材で、第１軸受部材２１Ｌを介して第２軸受部材２１Ｍを常時保持する。
【００１５】
請求項３に記載の発明は、たとえば以下の同じく図６および図７に示す実施の形態のように、
請求項２に記載の回転部材の軸受機構において、
第１段目の使用状態にあるとき、前記第２軸受部材２１Ｍで前記回転部材のスラスト方向の動きを規制してなる、ことを特徴とする。
【００１６】
そして、第１段目の使用をするとき、第２軸受部材２１Ｍで回転部材のスラスト方向の動きを規制する。
【００１７】
【発明の実施の形態】
以下、図面を参照しつつ、この発明の実施の形態を説明する。
図１は、複写機に適用した回転部材の軸受機構を示す断面図である。
【００１８】
図中符号１０は、複写機本体内において、図示省略した側の側板（この発明でいう「軸受保持部材」）と用紙搬送路を挾んで対向して設ける側板（この発明でいう「軸受保持部材」）である。側板１０には、円形の軸受孔１０ａを設ける。そして、その軸受孔１０ａには、軸受部材１１を取り付けてなる。
【００１９】
軸受部材１１は、円板部１１Ｌの両側から、それぞれ外径の等しい筒部１１Ｍ・１１Ｎを同軸に突出して形成する。円板部１１Ｌには、直径ｄ₁の中心孔を設けて第１軸受部１１ａを形成するとともに、周縁に両筒部１１Ｍ・１１Ｎの外周から突出する鍔部１１ｂを形成する。一方の筒部１１Ｍには、直径ｄ₂の内周孔を設けて第１軸受部１１ａと同軸に第２軸受部１１ｃを形成するとともに、外周にリング溝１１ｄを形成する。また、他方の筒部１１Ｎには、直径ｄ₃の内周孔を設けて同じく第１軸受部１１ａと同軸に逃げ１１ｅを形成するとともに、外周にリング溝１１ｆを形成する。
【００２０】
そして、はじめは、側板１０の外側からその軸受孔１０ａに軸受部材１１の筒部１１Ｎを挿入して側板１０の外面に鍔部１１ｂを突き当て、側板１０の内側に入り込んだリング溝１１ｆにＥリング・スナップリング等のリング部材１２を挿入して抜け止めし、側板１０の軸受孔１０ａに軸受部材１１を緩みなく取り付けて第１の使用態様により側板１０で保持する。
【００２１】
図示省略するが、側板１０と対向する他側の側板にも、同様な軸受部材を同様に取り付けて第１の使用態様により側板１０で保持する。そして、それらの軸受部材１１と不図示の軸受部材を介して側板１０と不図示の側板とで紙搬送ローラ（この発明でいう「回転部材」）１３を回転自在に支持する。
【００２２】
紙搬送ローラ１３は、直径Ｄ１で先端外周にリング溝１３ｂを有する第１軸部１３ａと、直径Ｄ２でその第１軸部１３ａを両端から突出するローラ状の第２軸部１３ｃとを同軸に設ける。そして、図示するように、第１軸部１３ａを軸受部材１１の第１軸受部１１ａに挿入するとともに、第２軸部１３ｃを逃げ１１ｅ内に挿入し、リング溝１３ｂにＥリング・スナップリング等のリング部材１４を挿入して紙搬送ローラ１３のスラスト方向の動きを規制してなる。
【００２３】
ここで、軸受部材１１の第１軸受部１１ａの直径ｄ₁と紙搬送ローラ１３の第１軸部１３ａの直径Ｄ₁との関係は、直径ｄ₁を寸法ａ(mm)で公差＋0.01〜＋0.05で形成するとき、直径Ｄ₁を寸法ａ(mm)で公差０〜−0.05で形成することが好ましい。また、軸受部材１１の逃げ１１ｅの直径ｄ₃と紙搬送ローラ１３の第２軸部１３ｃの直径Ｄ₂とはｄ₃＞Ｄ₂の関係とし、逃げ１１ｅ内に第２軸部１３ｃが余裕を持って入り込むようにする。
【００２４】
そして、はじめにこの第１段目の使用態様により、側板１０で軸受部材１１を保持し、軸受部材１１の第１軸受部１１ａで紙搬送ローラ１３の第１軸部１３ａを受けて第１段目の使用をする。
【００２５】
そうして、紙搬送ローラ１３の回転で、永年の使用により第１軸受部１１ａおよび第１軸部１３ａが摩耗したときは、リング部材１２・１４を外し、軸受部材１１を側板１０の外側に取り外す。そして、軸受部材１１を反転して今度は軸受孔１０ａに軸受部材１１の他方の筒部１１Ｍを挿入して側板１０の外面に鍔部１１ｂを突き当て、図２に示すように側板１０の内側に入り込んだリング溝１１ｄに再びリング部材１２を挿入して抜け止めし、側板１０の軸受孔１０ａに軸受部材１１を緩みなく取り付けて第２の使用態様により側板１０で保持する。
【００２６】
図示省略するが、他側でも、同様に軸受部材を反転して取り付け、第２の使用態様により側板１０で保持する。そして、それらの軸受部材１１と不図示の軸受部材を介して側板１０と不図示の側板とで紙搬送ローラ１３を回転自在に支持する。
【００２７】
紙搬送ローラ１３は、図示するように、第１軸部１３ａを軸受部材１１の第１軸受部１１ａに挿入するとともに、第２軸部１３ｃを第２軸受部１１ｃ内に挿入し、リング溝１３ｂに再びリング部材１４を挿入して紙搬送ローラ１３のスラスト方向の動きを規制してなる。
【００２８】
ここで、軸受部材１１の第２軸受部１１ｃの直径ｄ₂と紙搬送ローラ１３の第２軸部１３ｃの直径Ｄ₂との関係は、直径ｄ₂を寸法ｂ(mm)で公差＋0.01〜＋0.05で形成するとき、直径Ｄ₂を寸法ｂ(mm)で公差０〜−0.05で形成することが好ましい。なお、軸受部材１１の第１軸受部１１ａと紙搬送ローラ１３の第１軸部１３ａ間には摩耗があるから、ガタを生じ、それら間は、第２軸受部１１ｃと第２軸部１３ｃ間よりも余裕を持って係合することとなる。
【００２９】
そして、はじめの第１段目の使用により第１軸受部１１ａおよび第１軸部１３ａが摩耗したときは、次にはこの第２段目の使用態様により側板１０で軸受部材１１を保持し、軸受部材１１の第２軸受部１１ｃで紙送りローラ１３の第２軸部１３ｃを受けて第２段目の使用をする。
【００３０】
よって、図１および図２に示す実施の形態では、同じ軸受部材１１および紙送りローラ１３を２段階に使用することができるから、それらの寿命をほぼ２倍とすることができる効果がある。これにより、ランニングコストの低減を図るとともに、たとえばリサイクル使用を可能として製作コストの低減を図り、また近年の省資源化の要請に応えることができる。
【００３１】
ところで、図１に示す第１段目の使用態様により側板１０で軸受部材１１を保持するとき、図３に示すように側板１０に保護部材１５を取り付けてその保護部材１５で軸受部材１１の第２軸受部１１ｃを被うようにするとよい。
【００３２】
たとえば保護部材１５を、図３に示すように、環状溝１５ａを有する肉厚円板部１５ｂと、それからのばして先端に係止部１５ｃを有する複数の足部１５ｄとで構成する。そして、第１段目の使用をするとき、筒部１１Ｍを環状溝１５ａ内に入れるとともに、足部１５ｄの先端をそれぞれ側板１０の貫通孔１０ｂ内に通し、係止部１５ｃを側板１０に掛け止めする。
【００３３】
そうして、軸受部材１１の第２軸受部１１ｃを保護部材１５の肉厚円板部１５ｂで被って保護する。これにより、図３に示す実施の形態では、第１段目の使用をするとき、第２軸受部１１ｃ内にゴミが入り込み、その第２軸受部１１ｃを汚したりその第２軸受部に傷を付けたりするおそれをなくし、第２段目の正確でかつ確実な使用を確保することができる。
【００３４】
また、鍔部１１ｂを複数の足部１５ｄで押さえて軸受部材１１の外れを阻止するとともに、第１軸部１３ａの端面を肉厚円板部１５ｂの内面に突き当てて紙送り部材１３のスラスト方向の動きを規制するから、図１および図２に示す実施の形態で使用した、軸受部材１１の外れを阻止するリング部材１２や、紙送り部材１３のスラスト方向の動きを規制するリング部材１４を不要とし、部品点数を削減してコストダウンを図ることができる。また、軸受部材１１のリング溝１１ｄ・１１ｆを不要として軸受部材１１の加工を簡単とすることができる効果もある。
【００３５】
図１ないし図３に示す実施の形態では、一体の軸受部材１１に第１軸受部１１ａと第２軸受部１１ｃの双方を設けた。
ところで、この発明では、図４および図５に示す実施の形態のように、軸受部材２１を、第１軸受部２１ａを有する第１軸受部材２１Ｌと、第２軸受部２１ｃを有する第２軸受部材２１Ｍとで別体に構成する。
【００３６】
このとき、第１軸受部材２１Ｌの第１軸受部２１ａの直径ｄ₄と紙搬送ローラ２３の第１軸部２３ａの直径Ｄ₃との関係は、直径ｄ₄を寸法ｃ(mm)で公差＋0.01〜＋0.05で形成するとき、直径Ｄ₃を寸法ｃ(mm)で公差０〜−0.05で形成することが好ましい。
【００３７】
そして、はじめの第１段目の使用状態では、図４に示すように、側板２０の軸受孔２０ａに第１軸受部材２１Ｌの筒部２１ｂを軽圧入して側板２０で第１軸受部材２１Ｌを保持し、第１軸受部２１ａで紙搬送ローラ２３の第１軸部２３ａを受けて第１段目の使用をする。
【００３８】
次いで、紙搬送ローラ２３の回転で、永年の使用により第１軸受部２１ａおよび第１軸部２３ａが摩耗したときは、図５に示すように、周縁を軽圧入して第１軸受部材２１Ｌに第２軸受部材２１Ｍを取り付け、側板２０で第１軸受部材２１Ｌを介して第２軸受部材２１Ｍを保持し、第１軸受部２１ａと同軸に設ける第２軸受部２１ｃで第２軸部２３ｃを受けて第２段目の使用をする。
【００３９】
このとき、第２軸受部材２１Ｍの第２軸受部２１ｃの直径ｄ₅と紙搬送ローラ２３の第２軸部２３ｃの直径Ｄ₄との関係は、直径ｄ₅を寸法ｄ(mm)で公差＋0.01〜＋0.05で形成するとき、直径Ｄ₄を寸法ｄ(mm)で公差０〜−0.05で形成することが好ましい。
【００４０】
なお、この図４および図５に示す実施の形態では、第１軸受部材２１Ｌの内周に内向き突部２１ｄを設け、その内向き突部２１ｄに突き当てて紙搬送ローラ２３のスラスト方向の動きを規制する。
【００４１】
これにより、図４および図５に示す実施の形態では、第２段目の使用をするとき、図１ないし図３に示す実施の形態のように、紙搬送ローラ１３を支持している軸受部材１１をわざわざ分解して取り外し、付け替える面倒な作業をすることなく、新たに第２軸受部材２１Ｍを取り付けるだけで、同じ紙搬送ローラ２３を２段階に使用することができ、その寿命をほぼ２倍とすることができる。これにより、ランニングコストの低減を図るとともに、たとえばリサイクル使用を可能として製作コストの低減を図り、また近年の省資源化の要請に応えることができる。
【００４２】
ところで、図４および図５に示す実施の形態では、はじめの第１段目の使用状態では図４に示すように第２軸受部材２１Ｍを取り付けず、第２の使用状態のときはじめて第１軸受部材２１Ｌに第２軸受部材２１Ｍを取り付けるようにする。しかし、図６および図７に示す実施の形態のように、第１段目の使用状態のときから図６に示すようにたとえば軽圧入により第１軸受部材２１Ｌに第２軸受部材２１Ｍを取り付け、紙搬送ローラ２３と係合しない状態で第１軸受部材２１Ｌを介して側板２０で第２軸受部材２１Ｍを保持し、その第２軸受部材２１Ｍに突き当てて紙搬送ローラ２３のスラスト方向の動きを規制するようにしてもよい。
【００４３】
そして、第２の使用状態のときは、図７に示すように、第２軸受部材２１Ｍを反転し、たとえば同じく軽圧入して第１軸受部材２１Ｌに取り付け、第１軸受部２１ａと同軸に設ける第２軸受部２１ｃで第２軸部２３ｃを受けるようにしてもよい。
【００４４】
これにより、図６および図７に示す実施の形態では、第２段目の使用に入るとき、第２軸受部材２１Ｍを準備する必要がなく、第１段目の使用状態のときから付けてある第２軸受部材２１Ｍの簡単な付け替え作業で引き続き使用することができる効果がある。加えて、第１段目の使用をするとき、第２軸受部材２１Ｍで紙搬送部ローラ２３のスラスト方向の動きを規制することから、紙搬送部ローラ２３のスラスト方向の動きを規制する専用の部品を不要とし、部品点数を削減してコストダウンを図ることができる。
【００４８】
【発明の効果】
請求項１ないし３に記載の発明によれば、第１段目の使用で第１軸受部および第１軸部が摩耗したとき、次には第１軸受部材はそのままの状態でその第１軸受部材を介して第２軸受部材を取り付けて第２段目の使用をするから、回転部材を支持している軸受部材をわざわざ分解して取り外し、付け替える面倒な作業をすることなく、同じ回転部材を２段階に使用することができ、寿命をほぼ２倍とすることができる。これにより、ランニングコストの低減を図るとともに、たとえばリサイクル使用を可能として製作コストの低減を図り、また近年の省資源化の要請に応えることができる。
【００４９】
請求項２に記載の発明によれば、加えて、第１段目の使用で第１軸受部および第１軸部が摩耗したとき、第１軸受部材に取り付けている第２軸受部材を取り外して付け替えればよいから、第２段目の使用に入るとき、第２軸受部材を準備する必要がなく、第１段目の使用状態のときから付けてある第２軸受部材の簡単な付け替え作業で引き続き使用可能とすることができる。
【００５０】
請求項３に記載の発明によれば、加えて、第１段目の使用をするとき、第２軸受部材で回転部材のスラスト方向の動きを規制するから、回転部材のスラスト方向の動きを規制する専用の部品を不要とし、部品点数を削減してコストダウンを図ることができる。
【図面の簡単な説明】
【図１】複写機に適用した回転部材の軸受機構を示す断面図である。
【図２】その第２段目の使用状態を示す断面図である。
【図３】別の実施の形態である回転部材の軸受機構を示す断面図である。
【図４】複写機に適用したこの発明の一実施の形態である回転部材の軸受機構を示す断面図である。
【図５】その第２段目の使用状態を示す断面図である。
【図６】この発明の別の実施の形態である回転部材の軸受機構を示す断面図である。
【図７】その第２段目の使用状態を示す断面図である。
【符号の説明】
１０側板（軸受保持部材）
１１軸受部材
１１ａ第１軸受部
１１ｃ第２軸受部
１３紙搬送ローラ（回転部材）
１３ａ第１軸部
１３ｃ第２軸部
１５保護部材
２０側板（軸受保持部材）
２１軸受部材
２１Ｌ第１軸受部材
２１Ｍ第２軸受部材
２１ａ第１軸受部
２１ｃ第２軸受部
２３紙搬送ローラ（回転部材）
２３ａ第１軸部
２３ｃ第２軸部[0001]
BACKGROUND OF THE INVENTION
The present invention can be applied to, for example, a copying machine, a facsimile machine, a printer, or a complex machine thereof. More specifically, the present invention relates to a bearing mechanism for a rotating member that rotatably supports a rotating member such as a paper conveying roller used in such a device via a bearing.
[0002]
[Prior art]
Conventionally, for example, in a copying machine, a paper transport roller for transporting paper has been rotatably supported via a bearing.
[0003]
[Problems to be solved by the invention]
However, such paper transport rollers and bearings are worn out by long-term use, and therefore have to be replaced with new ones after a certain period of use.
[0004]
Therefore, the present invention prolongs the life of rotating members such as such paper transport rollers, improves durability and reduces running costs, and enables, for example, recycling to reduce production costs. The purpose is to meet the recent demand for resource saving.
[0011]
[ Means for Solving the Problems ]
Therefore, the invention described in claim 1 is, for example, like the embodiment shown in FIGS. 4 and 5 below,
In a bearing mechanism of a rotating member that holds a bearing member 21 with a bearing holding member such as a side plate 20 and rotatably supports a rotating member such as a paper transport roller 23 via the bearing member 21.
While providing the 1st axial part 23a and the 2nd axial part 23c coaxially in the said rotation member,
The bearing member 21 includes a first bearing member 21L having a first bearing portion 21a and a second bearing member 21M having a second bearing portion 21c.
In use of the first stage, holds the previous SL first bearing member 21L by the bearing holding member receiving said first shaft portion 23a in the first bearing portion 21a, the use state of the second stage The second bearing member 21M attached to the first bearing member 21L is held by the bearing holding member via the first bearing member 21L, and is provided coaxially with the first bearing portion 21a. The second shaft portion 23c is received by 21c.
[0012]
First, the first bearing member 21L is held by the bearing holding member, the first shaft portion 23a of the rotating member is received by the first bearing portion 21a, and the first stage is used. When the first shaft portion 23a is worn, the second bearing member 21M is held by the bearing holding member via the first bearing member 21L, and the second shaft portion 23c of the rotating member is received by the second bearing portion 21c. Use the second stage.
[0013]
The invention described in claim 2 is, for example, as shown in the following embodiments shown in FIGS.
In the bearing mechanism of the rotating member according to claim 1 ,
When the first stage is in use, the second bearing member 21M attached to the first bearing member 21L is held through the first bearing member 21L without being engaged with the rotating member. It is characterized by being held by a member .
[0014]
Then, the second bearing member 21M is always held by the bearing holding member via the first bearing member 21L .
[0015]
The invention described in claim 3 is, for example, the following embodiment shown in FIGS.
In the bearing mechanism of the rotating member according to claim 2 ,
When the first stage is in use, the second bearing member 21M regulates the movement of the rotating member in the thrust direction.
[0016]
When the first stage is used, the movement of the rotating member in the thrust direction is restricted by the second bearing member 21M.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
Figure 1 is a sectional view showing a bearing mechanism of the applied rotating member in the copying machine.
[0018]
Reference numeral 10 in the drawing denotes a side plate (a “bearing holding member” referred to in the present invention) that faces the side plate (not shown) (the “bearing holding member” referred to in the present invention) and faces the paper conveyance path in the copier body. ]). The side plate 10 is provided with a circular bearing hole 10a. And the bearing member 11 is attached to the bearing hole 10a.
[0019]
The bearing member 11 is formed by coaxially projecting cylindrical portions 11M and 11N having the same outer diameter from both sides of the disc portion 11L. The disk portion 11L is provided with a center hole having a diameter d ₁ to form the first bearing portion 11a, and a flange portion 11b protruding from the outer periphery of both the cylindrical portions 11M and 11N is formed on the periphery. One cylindrical portion 11M is provided with an inner peripheral hole having a diameter d ₂ to form a second bearing portion 11c coaxially with the first bearing portion 11a, and a ring groove 11d is formed on the outer periphery. Further, the other of the cylindrical portion 11N, to form a 11e escapes to also the first bearing portion 11a coaxially provided an inner peripheral hole of diameter d _3, to form a ring groove 11f on the outer periphery.
[0020]
At first, the cylindrical portion 11N of the bearing member 11 is inserted into the bearing hole 10a from the outside of the side plate 10, the flange portion 11b is abutted against the outer surface of the side plate 10, and the ring groove 11f entering the inside of the side plate 10 is inserted into the ring groove 11f. A ring member 12 such as a ring / snap ring is inserted to prevent it from coming off, and the bearing member 11 is attached to the bearing hole 10a of the side plate 10 without looseness and held by the side plate 10 according to the first mode of use.
[0021]
Although illustration is omitted, a similar bearing member is similarly attached to the other side plate facing the side plate 10 and held by the side plate 10 according to the first usage mode. A paper transport roller (a “rotating member” in the present invention) 13 is rotatably supported by the side plate 10 and a side plate (not shown) via the bearing member 11 and a bearing member (not shown).
[0022]
The paper conveying roller 13 has a first shaft portion 13a having a diameter D1 and a ring groove 13b on the outer periphery of the tip, and a roller-shaped second shaft portion 13c having a diameter D2 and protruding from the both ends of the first shaft portion 13a. Provide. Then, as shown in the drawing, the first shaft portion 13a is inserted into the first bearing portion 11a of the bearing member 11, and the second shaft portion 13c is inserted into the relief 11e, and an E-ring, a snap ring, etc. are inserted into the ring groove 13b. The ring member 14 is inserted to restrict the movement of the paper conveying roller 13 in the thrust direction.
[0023]
The relationship between the diameter D ₁ of the first shaft portion 13a of the first diameter d ₁ of the bearing portion 11a and the sheet transport roller 13 of the bearing member 11, the tolerance of the diameter d ₁ dimensions a (mm) +0.01 when forming at ~ + 0.05, it is preferable to form a tolerance 0-0.05 a diameter D ₁ dimensions a (mm). Further, the relation of d _3> D ₂ and the diameter D ₂ of the second shaft portion 13c of a diameter d ₃ and the paper conveying roller 13 of the relief 11e of the bearing member 11, the second shaft portion 13c is a margin in the relief 11e Bring it in.
[0024]
First, according to the use state of the first stage, the bearing member 11 is held by the side plate 10, and the first shaft part 13 a of the paper transport roller 13 is received by the first bearing part 11 a of the bearing member 11. To use.
[0025]
Then, when the first bearing portion 11a and the first shaft portion 13a are worn due to the rotation of the paper transport roller 13, the ring members 12 and 14 are removed, and the bearing member 11 is moved to the outside of the side plate 10. Remove. Then, the bearing member 11 is inverted and this time, the other cylindrical portion 11M of the bearing member 11 is inserted into the bearing hole 10a, and the flange portion 11b is abutted against the outer surface of the side plate 10, and as shown in FIG. The ring member 12 is inserted again into the ring groove 11d that has entered, and is prevented from coming off, and the bearing member 11 is attached to the bearing hole 10a of the side plate 10 without looseness and is held by the side plate 10 according to the second usage mode.
[0026]
Although not shown in the figure, the bearing member is similarly reversed and attached to the other side, and is held by the side plate 10 according to the second usage mode. The paper conveying roller 13 is rotatably supported by the side plate 10 and the side plate (not shown) via the bearing member 11 and a bearing member (not shown).
[0027]
As shown in the drawing, the paper transport roller 13 inserts the first shaft portion 13a into the first bearing portion 11a of the bearing member 11, and inserts the second shaft portion 13c into the second bearing portion 11c, and the ring groove 13b. The ring member 14 is inserted again to restrict the movement of the paper transport roller 13 in the thrust direction.
[0028]
The relationship between the diameter D ₂ of the second shaft portion 13c of the second bearing portion 11c of the diameter d ₂ and the paper conveying roller 13 of the bearing member 11, the tolerance of the diameter d ₂ dimensions b (mm) +0.01 when forming at ~ + 0.05, it is preferable to form a tolerance 0-0.05 a diameter D ₂ dimensions b (mm). In addition, since there is abrasion between the 1st bearing part 11a of the bearing member 11 and the 1st axial part 13a of the paper conveyance roller 13, it produces backlash, and between them, between the 2nd bearing part 11c and the 2nd axial part 13c. Engage with more margin.
[0029]
And when the first bearing portion 11a and the first shaft portion 13a are worn due to the use of the first stage, the bearing member 11 is held by the side plate 10 according to the use state of the second stage, The second shaft portion 13c of the paper feed roller 13 is received by the second bearing portion 11c of the bearing member 11 and used in the second stage.
[0030]
Therefore, in the embodiment shown in FIG. 1 and FIG. 2, the same bearing member 11 and paper feed roller 13 can be used in two stages, so that there is an effect that their lifetime can be almost doubled. As a result, it is possible to reduce the running cost, to reduce the manufacturing cost by enabling, for example, recycling, and to meet the recent demand for resource saving.
[0031]
By the way, when the bearing member 11 is held by the side plate 10 according to the first-stage use mode shown in FIG. 1, the protection member 15 is attached to the side plate 10 as shown in FIG. It is preferable to cover the two bearing portions 11c.
[0032]
For example, as shown in FIG. 3, the protection member 15 includes a thick disc portion 15b having an annular groove 15a and a plurality of foot portions 15d having a locking portion 15c extending from the tip. When the first stage is used, the cylindrical portion 11M is inserted into the annular groove 15a, the tips of the foot portions 15d are respectively passed through the through holes 10b of the side plate 10, and the locking portions 15c are hung on the side plate 10. Stop.
[0033]
Then, the second bearing portion 11 c of the bearing member 11 is covered and protected by the thick disc portion 15 b of the protection member 15. Accordingly, in the embodiment shown in FIG. 3, when the first stage is used, dust enters the second bearing portion 11 c and soils the second bearing portion 11 c or damages the second bearing portion. There is no fear of attaching, and accurate and reliable use of the second stage can be ensured.
[0034]
Further, the flange portion 11b is pressed by the plurality of foot portions 15d to prevent the bearing member 11 from coming off, and the end surface of the first shaft portion 13a is abutted against the inner surface of the thick disc portion 15b to thrust the paper feeding member 13 Since the movement of the direction is restricted, the ring member 12 used in the embodiment shown in FIGS. 1 and 2 to prevent the bearing member 11 from coming off, and the ring member 14 that restricts the movement of the paper feed member 13 in the thrust direction. The cost can be reduced by reducing the number of parts. Further, there is an effect that the processing of the bearing member 11 can be simplified by eliminating the need for the ring grooves 11d and 11f of the bearing member 11.
[0035]
In the embodiment shown in FIGS . 1 to 3, both the first bearing portion 11 a and the second bearing portion 11 c are provided on the integral bearing member 11.
By the way, in this invention, like embodiment shown to FIG. 4 and FIG. 5, the bearing member 21 is the 1st bearing member 21L which has the 1st bearing part 21a, and the 2nd bearing member which has the 2nd bearing part 21c. constitute a separate body with a 21M.
[0036]
At this time, the relationship between the diameter D ₃ of the first shaft portion 23a of the first bearing member 21L of the first bearing portion 21a with a diameter d ₄ and the paper transport roller 23, the tolerance diameter d ₄ dimensions c (mm) +0 when forming by .01～ + 0.05, it is preferable to form a tolerance 0-0.05 a diameter D ₃ dimensions c (mm).
[0037]
In the first use state of the first stage, as shown in FIG. 4, the cylindrical portion 21 b of the first bearing member 21 L is lightly press-fitted into the bearing hole 20 a of the side plate 20, and the first bearing member 21 L is moved by the side plate 20. The first shaft portion 23a of the paper transport roller 23 is received by the first bearing portion 21a and used in the first stage.
[0038]
Next, when the first bearing portion 21a and the first shaft portion 23a are worn by the rotation of the paper conveying roller 23 due to long-term use, the peripheral edge is lightly press-fitted into the first bearing member 21L as shown in FIG. The second bearing member 21M is attached, the second bearing member 21M is held by the side plate 20 via the first bearing member 21L, and the second shaft portion 23c is received by the second bearing portion 21c provided coaxially with the first bearing portion 21a. Use the second stage.
[0039]
At this time, the relationship between the diameter D ₄ of the second shaft portion 23c of the second bearing member second bearing portion 21c of the diameter d ₅ and the paper conveying roller 23 of 21M, the tolerance diameter d ₅ dimensions d (mm) +0 when forming by .01～ + 0.05, it is preferable to form a tolerance 0-0.05 a diameter D ₄ dimensions d (mm).
[0040]
In the embodiment shown in FIG. 4 and FIG. 5, an inward protrusion 21d is provided on the inner periphery of the first bearing member 21L and abuts against the inward protrusion 21d in the thrust direction of the paper transport roller 23. Regulate movement.
[0041]
Accordingly, in the embodiment shown in FIGS. 4 and 5, when the second stage is used, the bearing member that supports the paper transport roller 13 as in the embodiment shown in FIGS. 1 to 3. The same paper transport roller 23 can be used in two stages just by newly installing the second bearing member 21M without the troublesome work of disassembling and removing 11 and replacing it. It can be. As a result, it is possible to reduce the running cost, to reduce the manufacturing cost by enabling, for example, recycling, and to meet the recent demand for resource saving.
[0042]
In the embodiment shown in FIGS. 4 and 5, in the first use state of the first stage, the second bearing member 21M is not attached as shown in FIG. 4, and the first bearing is not used in the second use state. The second bearing member 21M is attached to the member 21L. However, as in the embodiment shown in FIGS. 6 and 7, the second bearing member 21M is attached to the first bearing member 21L by light press-fitting, for example, as shown in FIG. The second bearing member 21M is held by the side plate 20 via the first bearing member 21L in a state where it is not engaged with the paper conveying roller 23, and the movement of the paper conveying roller 23 in the thrust direction is abutted against the second bearing member 21M. You may make it regulate.
[0043]
In the second use state, as shown in FIG. 7, the second bearing member 21M is inverted, for example, lightly press-fitted and attached to the first bearing member 21L, and provided coaxially with the first bearing portion 21a. You may make it receive the 2nd axial part 23c by the 2nd bearing part 21c.
[0044]
Accordingly, in the embodiment shown in FIG. 6 and FIG. 7, it is not necessary to prepare the second bearing member 21 </ b> M when starting to use the second stage, and it is attached from the time of using the first stage. There is an effect that the second bearing member 21M can be continuously used by a simple replacement operation. In addition, when the first stage is used, the second bearing member 21M restricts the movement of the paper conveying unit roller 23 in the thrust direction, and thus the dedicated movement for restricting the movement of the paper conveying unit roller 23 in the thrust direction. Parts can be eliminated, and the number of parts can be reduced to reduce costs.
[0048]
[ Effect of the invention ]
According to the invention described in claims 1 to 3, when the first bearing portion and the first shaft portion in use of the first stage is worn, the the next first bearing member as it is Desolation 1 Since the second bearing member is attached via the bearing member and used in the second stage, the same rotating member can be used without the troublesome work of disassembling and removing and replacing the bearing member supporting the rotating member. Can be used in two stages, and the lifetime can be almost doubled. As a result, it is possible to reduce the running cost, to reduce the manufacturing cost by enabling, for example, recycling, and to meet the recent demand for resource saving.
[0049]
According to the second aspect of the invention, in addition, when the first bearing portion and the first shaft portion are worn due to the use of the first stage, the second bearing member attached to the first bearing member is removed. Since it is only necessary to replace the second bearing member, it is not necessary to prepare the second bearing member when the second stage is used, and the second bearing member that has been used since the first stage is used can be simply replaced. Can be usable.
[0050]
According to the third aspect of the invention, in addition, when the first stage is used, the second bearing member restricts the movement of the rotating member in the thrust direction. Therefore, the movement of the rotating member in the thrust direction is restricted. This eliminates the need for dedicated parts, reduces the number of parts, and reduces costs.
[Brief description of the drawings]
1 is a cross-sectional view showing a bearing mechanism of the applied rotating member in the copying machine.
FIG. 2 is a sectional view showing a usage state of the second stage.
FIG. 3 is a cross-sectional view showing a bearing mechanism of a rotating member according to another embodiment.
FIG. 4 is a sectional view showing a bearing mechanism for a rotating member according to an embodiment of the present invention applied to a copying machine .
FIG. 5 is a cross-sectional view showing a usage state of the second stage.
FIG. 6 is a sectional view showing a bearing mechanism for a rotating member according to another embodiment of the present invention .
FIG. 7 is a cross-sectional view showing a usage state of the second stage.
[Explanation of symbols]
10 Side plate (bearing holding member)
11 Bearing member 11a First bearing portion 11c Second bearing portion 13 Paper transport roller (rotating member)
13a 1st shaft part 13c 2nd shaft part 15 Protection member 20 Side plate (bearing holding member)
21 Bearing member 21L 1st bearing member 21M 2nd bearing member 21a 1st bearing part 21c 2nd bearing part 23 Paper conveyance roller (rotating member)
23a First shaft portion 23c Second shaft portion

Claims

軸受保持部材で軸受部材を保持し、その軸受部材を介して回転部材を回転自在に支持する回転部材の軸受機構において、
前記回転部材に第１軸部と第２軸部を同軸に設けるとともに、
前記軸受部材を、第１軸受部を有する第１軸受部材と第２軸受部を有する第２軸受部材とで構成し、
第１段目の使用状態では、前記第１軸受部材を前記軸受保持部材で保持して前記第１軸受部で前記第１軸部を受け、第２段目の使用状態では、前記第１軸受部材に取り付けた前記第２軸受部材を、その第１軸受部材を介して前記軸受保持部材で保持し、前記第１軸受部と同軸に設ける前記第２軸受部で前記第２軸部を受けてなる、回転部材の軸受機構。In the bearing mechanism of the rotating member that holds the bearing member with the bearing holding member and rotatably supports the rotating member via the bearing member,
While providing the first shaft portion and the second shaft portion coaxially in the rotating member,
The bearing member includes a first bearing member having a first bearing portion and a second bearing member having a second bearing portion,
In use of the first stage, pre-Symbol receiving said first shaft portion in the first bearing part holds the first bearing member in the bearing holding member, In use of the second stage, the first The second bearing member attached to one bearing member is held by the bearing holding member via the first bearing member, and the second shaft portion is provided coaxially with the first bearing portion. A bearing mechanism for the rotating member.

第１段目の使用状態にあるとき、前記回転部材と係合しない状態で、前記第１軸受部材に取り付けた前記第２軸受部材を、その第１軸受部材を介して前記軸受保持部材で保持してなる、請求項１に記載の回転部材の軸受機構。When the first stage is in use, the second bearing member attached to the first bearing member is held by the bearing holding member via the first bearing member without being engaged with the rotating member. The bearing mechanism for a rotating member according to claim 1 .

第１段目の使用状態にあるとき、前記第２軸受部材で前記回転部材のスラスト方向の動きを規制してなる、請求項２に記載の回転部材の軸受機構。When in use state of the first stage, formed by regulating the thrust movement of the rotary member by the second bearing member, the bearing mechanism of the rotary member according to claim 2.