JPH08108949A - Transfer belt device - Google Patents
Transfer belt deviceInfo
- Publication number
- JPH08108949A JPH08108949A JP6245655A JP24565594A JPH08108949A JP H08108949 A JPH08108949 A JP H08108949A JP 6245655 A JP6245655 A JP 6245655A JP 24565594 A JP24565594 A JP 24565594A JP H08108949 A JPH08108949 A JP H08108949A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- ball bearings
- transfer belt
- ball bearing
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Color Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機、プリンタ等の
画像形成装置における転写ベルト装置に関し、詳しくは
転写ベルトを張架するローラの取付け支持に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer belt device in an image forming apparatus such as a copying machine or a printer, and more particularly to mounting and supporting a roller for stretching the transfer belt.
【０００２】[0002]
【従来の技術】感光体上のトナー像を転写用紙に転写す
る転写ベルト、この転写ベルトを回転駆動する駆動ロー
ラ、この回転に従動する従動ローラ、及び駆動ローラと
従動ローラを回動自在に支持するフレーム等から構成さ
れる転写ベルト装置が知られている。2. Description of the Related Art A transfer belt for transferring a toner image on a photosensitive member to a transfer sheet, a drive roller for rotationally driving the transfer belt, a driven roller driven by this rotation, and a drive roller and a driven roller rotatably supported. A transfer belt device including a moving frame and the like is known.
【０００３】この転写ベルト装置の従動ローラの取付け
は、図６、図７に示すように行われる。同図中、矢印Ｃ
で示すように、両端の軸に軸受３５が設けられている従
動ローラ３３は、その一端が一度フレーム３４のローラ
取付け穴３４ａに差し通されてから、他端がローラ取付
け部３４ｂに係合されてフレーム３４に組付けられる。
その後、図６において、従動ローラ３３の一端が、固定
部材３６及び締結部品３７によりローラ取付け穴３４ａ
に固定されて、従動ローラ３３はフレーム３４に取付け
られる。また、図７において、従動ローラ３５の他端に
Ｅリング３８が係合されて、従動ローラ３３はフレーム
３４に取付けられる。The driven roller of this transfer belt device is mounted as shown in FIGS. In the figure, arrow C
As shown in, the driven roller 33 having bearings 35 on both ends is inserted into the roller mounting hole 34a of the frame 34 at one end and then engaged with the roller mounting portion 34b at the other end. Is assembled to the frame 34.
Then, in FIG. 6, one end of the driven roller 33 is fixed to the roller mounting hole 34a by the fixing member 36 and the fastening component 37.
The driven roller 33 is fixed to the frame 34 and attached to the frame 34. Further, in FIG. 7, an E ring 38 is engaged with the other end of the driven roller 35, and the driven roller 33 is attached to the frame 34.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述の
転写ベルト装置では、軸受が設けられている従動ローラ
をフレームに組付けるとき、固定部材や締結部品を用い
るために組立性や、異常時の交換作業性が悪いという問
題点がある。また、駆動ローラや従動ローラの軸受とし
て玉軸受を使用することが多いが、玉軸受を使用した場
合には、玉軸受は振動防止や剛性向上のために軸方向に
適正な予圧で付勢することが推奨されている。この予圧
を怠ると、フレッチングと呼ばれている微小振動による
酸化をともなう摩耗が発生するという問題点がある。さ
らに、玉軸受に異常が発生して予圧を必要とした際に
は、フレームと玉軸受との間に弾性を持つ部材等を追加
して玉軸受に予圧を付与しなければならなくなり、コス
トアップや分解組立作業が複雑になるという問題点があ
る。However, in the above-mentioned transfer belt device, when the driven roller provided with the bearing is assembled to the frame, the fixing member and the fastening parts are used, so that the assembling property and the replacement at the time of abnormality are exchanged. There is a problem that workability is poor. In addition, ball bearings are often used as bearings for drive rollers and driven rollers. When ball bearings are used, the ball bearings are urged with an appropriate preload in the axial direction to prevent vibration and improve rigidity. Is recommended. If this preload is neglected, there is a problem that abrasion accompanied by oxidation due to minute vibration called fretting occurs. Furthermore, when an abnormality occurs in the ball bearings and preload is required, it is necessary to add elastic members between the frame and the ball bearings to apply preload to the ball bearings. There is a problem that the disassembling and assembling work becomes complicated.
【０００５】よって、本発明は、上述の問題点に鑑みて
なされたものであり、フレームに対してローラや玉軸受
の組立作業性が良く、組付けるだけで玉軸受に予圧を付
与する転写ベルト装置を提供することを目的とする。Therefore, the present invention has been made in view of the above-mentioned problems, and the workability of assembling the roller and the ball bearing to the frame is good, and the transfer belt applies a preload to the ball bearing only by assembling. The purpose is to provide a device.
【０００６】[0006]
【課題を解決するための手段】本発明は、少なくとも二
つのローラの間に張架された転写ベルトと、ローラのう
ち少なくとも一つのローラの両端の軸にそれぞれ設けら
れた玉軸受と、この玉軸受を支持する一対の弾性体から
なるフレームとを備えた転写ベルト装置であって、各フ
レームの対向内側面に玉軸受を受け入れる玉軸受保持部
を形成し、この玉軸受保持部で玉軸受をローラの両側か
ら弾性的に挾み付けて支持する構成である。SUMMARY OF THE INVENTION The present invention is a transfer belt stretched between at least two rollers, ball bearings provided on shafts at both ends of at least one of the rollers, and the ball bearing. A transfer belt device comprising a pair of elastic bodies for supporting bearings, wherein ball bearing holding portions for receiving ball bearings are formed on opposing inner side surfaces of each frame, and the ball bearing holding portions are used to form the ball bearings. It is configured to be elastically sandwiched and supported from both sides of the roller.
【０００７】[0007]
【作用】本発明によれば、弾性体からなるフレームに玉
軸受保持部を形成し、玉軸受をローラの両側から弾性的
に挾み付けて支持するので、両端の軸に玉軸受が設けら
れた部にローラを、フレームに組付けるだけで取付作業
が終了し、さらに、取付けるだけで軸受に予圧が付与さ
れる。According to the present invention, the ball bearing holding portion is formed on the frame made of an elastic body, and the ball bearings are elastically sandwiched and supported from both sides of the roller, so that the shafts at both ends are provided with the ball bearings. The mounting work is completed simply by assembling the roller to the frame to the frame, and the bearing is preloaded by simply mounting the roller.
【０００８】[0008]
【実施例】本発明の一実施例を図面を参照して説明す
る。図１に示すように、転写ベルト装置１０は、感光体
上のトナー像を転写用紙に転写する転写ベルト１、この
転写ベルトを回転駆動する駆動ローラ２、この回転に従
動する従動ローラ３、及び駆動ローラ２と従動ローラ３
とを図示しない玉軸受５を介して回動自在に支持するフ
レーム４等から構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a transfer belt device 10 includes a transfer belt 1 that transfers a toner image on a photoconductor onto a transfer sheet, a driving roller 2 that rotationally drives the transfer belt, a driven roller 3 that follows this rotation, and Drive roller 2 and driven roller 3
And a frame 4 for rotatably supporting them via a ball bearing 5 (not shown).
【０００９】図２及び図３において、従動ローラ３の両
端部はテーパー状に形成されており、その両端の軸には
それぞれ玉軸受５が設けられている。玉軸受５は、図４
に示すように、従動ローラ３の軸３ａに固定された内輪
６と、ローラ支持部材４ａに支持される外輪７と、内輪
６と外輪７との間に配設された複数の球８とから構成さ
れる。2 and 3, both ends of the driven roller 3 are tapered, and ball bearings 5 are provided on the shafts at both ends thereof. The ball bearing 5 is shown in FIG.
As shown in FIG. 1, the inner ring 6 fixed to the shaft 3a of the driven roller 3, the outer ring 7 supported by the roller support member 4a, and the plurality of balls 8 arranged between the inner ring 6 and the outer ring 7 are formed. Composed.
【００１０】フレーム４は、一対のローラ支持部材４
ａ，４ａが連結部材を介して互いに連結して構成されて
いる。ローラ支持部材４ａは、プラスチック等の弾性変
形可能な材質によって作られており、その端部４１に
は、従動ローラ３の組付けを容易にする切欠き部４ｂ
と、玉軸受５を保持する保持部４ｃとが一体的に設けら
れている。切欠き部４ｂは、玉軸受５がフレーム４に図
中矢印Ａで示す向きに、組付け易いよう切欠かれてい
る。保持部４ｃには、玉軸受５がフレーム４に組付けら
れたとき、内輪６を逃す逃げ穴４ｄが穿たれている。The frame 4 comprises a pair of roller support members 4
a and 4a are connected to each other via a connecting member. The roller support member 4a is made of an elastically deformable material such as plastic, and the end portion 41 thereof has a notch 4b for facilitating the assembly of the driven roller 3.
And a holding portion 4c for holding the ball bearing 5 are integrally provided. The notch 4b is notched so that the ball bearing 5 can be easily attached to the frame 4 in the direction indicated by the arrow A in the figure. The holding portion 4c has an escape hole 4d through which the inner ring 6 escapes when the ball bearing 5 is assembled to the frame 4.
【００１１】図３において、ローラ支持部材４ａの一方
の保持部４ｃから他方の保持部４ｃまでの距離をＬ1、
従動ローラ３の両端部に玉軸受５をそれぞれ設けたとき
の一方の玉軸受５から他方の玉軸受５までの距離をＬ2
とする。距離Ｌ1と距離Ｌ2との関係は、Ｌ1＜Ｌ2に定め
られており、Ｌ2−Ｌ1の差がローラ支持部材４ａに従動
ローラ３を組付けたときのローラ支持部材４ａの弾性変
形量となる。この弾性変形量が、各玉軸受５を従動ロー
ラ３の両側から付勢し、玉軸受５に対する予圧になる。In FIG. 3, the distance from one holding portion 4c of the roller supporting member 4a to the other holding portion 4c is L 1 ,
When the ball bearings 5 are provided at both ends of the driven roller 3, the distance from one ball bearing 5 to the other ball bearing 5 is L 2
And The relationship between the distance L 1 and the distance L 2 is defined as L 1 <L 2 , and the difference of L 2 −L 1 is that of the roller support member 4a when the driven roller 3 is assembled. The amount of elastic deformation. This amount of elastic deformation urges each ball bearing 5 from both sides of the driven roller 3 and becomes a preload on the ball bearing 5.
【００１２】次に、従動ローラ３の組付けについて説明
する。図２、図３において、切欠き部４ｂに玉軸受５を
嵌入して、保持部４ｃを外側（図中矢印Ｂで示す向き）
に弾性変形させ、玉軸受５を保持部４ｃに嵌合させて従
動ローラ３をローラ支持部材４ａに組付ける。図５に示
すように、保持部４ｃに嵌合された玉軸受５の外輪７
は、ローラ支持部材４ａの弾性変形による付勢力（図中
矢印Ｆ）によって、ローラ支持部材４ａの内側に付勢さ
れ、内輪６は、上記付勢力の反作用の力（図中矢印
Ｆ’）によって、逃げ穴４ｄに遊嵌されてローラ支持部
材４ａの外側に付勢される。この付勢力が、玉軸受５に
対して予圧を付与する。Next, the assembling of the driven roller 3 will be described. In FIG. 2 and FIG. 3, the ball bearing 5 is fitted into the cutout portion 4b, and the holding portion 4c is located outside (the direction indicated by the arrow B in the drawings).
The ball bearing 5 is fitted to the holding portion 4c, and the driven roller 3 is assembled to the roller supporting member 4a. As shown in FIG. 5, the outer ring 7 of the ball bearing 5 fitted to the holding portion 4c.
Is urged to the inside of the roller support member 4a by the urging force (arrow F in the figure) due to the elastic deformation of the roller support member 4a, and the inner ring 6 is urged by the reaction force (arrow F'in the figure) of the urging force. , Is loosely fitted in the escape hole 4d and is urged to the outside of the roller support member 4a. This urging force applies a preload to the ball bearing 5.
【００１３】フレームの弾性変形による付勢力を、玉軸
受の予圧の推奨値になるようにフレームの材質やＬ2−
Ｌ1の値によって適宜設定すれば、玉軸受を用いてロー
ラを支持する場合に、ローラをフレームに組付けるだけ
で玉軸受に適正な予圧が付与される。また、上述の一実
施例は従動ローラについて説明したが、駆動ローラの組
付け部に上述の構成を用いても良い。The material of the frame and L 2- so that the urging force due to the elastic deformation of the frame becomes the recommended value of the preload of the ball bearing.
By appropriately setting the value of L 1 , when the roller is supported using the ball bearing, proper preload is applied to the ball bearing simply by assembling the roller to the frame. Further, although the driven roller has been described in the above-described embodiment, the above-described configuration may be used for the assembly portion of the drive roller.
【００１４】[0014]
【発明の効果】本発明によれば、フレームにローラを組
付けるだけで取付作業が終了し、さらに、取付けるだけ
で軸受に予圧が付与されるので、固定部材や締結部品を
用いず、また、工具等も用いずにローラがフレームに組
付け可能になり、組付作業性や交換作業性が向上し、コ
ストの低減になる。また、フレームにローラを組付ける
だけで球軸受に予圧が付与されるので、部品を追加する
ことなく、玉軸受に適正な予圧をかけることが可能にな
り、玉軸受のフレッチングの対策も同時に行うことがで
きる。さらに、フレームに対して一方向からローラを組
付けることができるので、自動組立にも対応可能であ
る。According to the present invention, since the mounting work is completed only by assembling the roller to the frame, and the bearing is preloaded only by mounting the frame, the fixing member and the fastening component are not used, and The roller can be assembled to the frame without using a tool or the like, which improves assembly workability and replacement workability and reduces cost. In addition, since preload is applied to the ball bearings simply by assembling the rollers to the frame, it is possible to apply proper preload to the ball bearings without adding any parts, and at the same time take measures against fretting of the ball bearings. be able to. Further, since the roller can be assembled to the frame from one direction, it is possible to support automatic assembly.
【図１】本発明の一実施例を示す転写ベルト装置の斜視
図である。FIG. 1 is a perspective view of a transfer belt device showing an embodiment of the present invention.
【図２】本発明の一実施例の要部を示す拡大斜視図であ
る。FIG. 2 is an enlarged perspective view showing a main part of an embodiment of the present invention.
【図３】フレームの従動ローラ取付け部の寸法と、従動
ローラの寸法との関係を示す平面図である。FIG. 3 is a plan view showing a relationship between dimensions of a driven roller mounting portion of a frame and dimensions of a driven roller.
【図４】従動ローラに取付けられた玉軸受の一部断面の
平面図である。FIG. 4 is a plan view of a partial cross section of a ball bearing attached to a driven roller.
【図５】玉軸受がフレームに取付けられた状態を示す一
部断面の拡大平面図である。FIG. 5 is an enlarged plan view of a partial cross section showing a state in which the ball bearing is attached to the frame.
【図６】従来の従動ローラの取付けを説明する斜視図で
ある。FIG. 6 is a perspective view illustrating attachment of a conventional driven roller.
【図７】従来の従動ローラの取付けを説明する斜視図で
ある。FIG. 7 is a perspective view illustrating attachment of a conventional driven roller.
１ 転写ベルト ２ 駆動ローラ ３，３３ 従動ローラ ４，３４ フレーム ４ａ ローラ支持部材 ４ｂ 切欠き部 ４ｃ 保持部 ４ｄ 逃げ穴 ５，３５ 玉軸受 １０ 転写ベルト装置 DESCRIPTION OF SYMBOLS 1 transfer belt 2 drive roller 3,33 driven roller 4,34 frame 4a roller support member 4b notch part 4c holding part 4d escape hole 5,35 ball bearing 10 transfer belt device
Claims (1)
転写ベルトと、上記ローラのうち少なくとも一つのロー
ラの両端の軸にそれぞれ設けられた玉軸受と、この玉軸
受を支持する一対の弾性体からなるフレームとを備えた
転写ベルト装置であって、上記各フレームの対向内側面
に上記玉軸受を受け入れる玉軸受保持部を形成し、この
玉軸受保持部で上記玉軸受を上記ローラの両側から弾性
的に挾み付けて支持することを特徴とした転写ベルト装
置。1. A transfer belt stretched between at least two rollers, ball bearings respectively provided on shafts at both ends of at least one of the rollers, and a pair of elastic members for supporting the ball bearings. A transfer belt device comprising a frame composed of a body, wherein ball bearing holding portions for receiving the ball bearings are formed on opposing inner surfaces of the respective frames, and the ball bearing holding portions allow the ball bearings to be provided on both sides of the roller. The transfer belt device is characterized by elastically sandwiching and supporting it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24565594A JP3283707B2 (en) | 1994-10-11 | 1994-10-11 | Transfer belt device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24565594A JP3283707B2 (en) | 1994-10-11 | 1994-10-11 | Transfer belt device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08108949A true JPH08108949A (en) | 1996-04-30 |
| JP3283707B2 JP3283707B2 (en) | 2002-05-20 |
Family
ID=17136860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24565594A Expired - Lifetime JP3283707B2 (en) | 1994-10-11 | 1994-10-11 | Transfer belt device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3283707B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298829A (en) * | 2006-05-01 | 2007-11-15 | Ricoh Co Ltd | Roller member, roller device, belt device, image forming apparatus and method for assembling roller member |
| US10025229B2 (en) | 2014-12-26 | 2018-07-17 | Ricoh Company, Ltd. | Belt unit, transfer device, and image forming apparatus |
| JP2018205641A (en) * | 2017-06-08 | 2018-12-27 | ブラザー工業株式会社 | Drive device and image formation apparatus |
| CN109335755A (en) * | 2018-10-29 | 2019-02-15 | 滁州千字文印务有限公司 | The automatic feeding of printing equipment |
-
1994
- 1994-10-11 JP JP24565594A patent/JP3283707B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298829A (en) * | 2006-05-01 | 2007-11-15 | Ricoh Co Ltd | Roller member, roller device, belt device, image forming apparatus and method for assembling roller member |
| US10025229B2 (en) | 2014-12-26 | 2018-07-17 | Ricoh Company, Ltd. | Belt unit, transfer device, and image forming apparatus |
| JP2018205641A (en) * | 2017-06-08 | 2018-12-27 | ブラザー工業株式会社 | Drive device and image formation apparatus |
| CN109335755A (en) * | 2018-10-29 | 2019-02-15 | 滁州千字文印务有限公司 | The automatic feeding of printing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3283707B2 (en) | 2002-05-20 |
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