JPH0718643Y2 - Belt support device - Google Patents
Belt support deviceInfo
- Publication number
- JPH0718643Y2 JPH0718643Y2 JP1986085779U JP8577986U JPH0718643Y2 JP H0718643 Y2 JPH0718643 Y2 JP H0718643Y2 JP 1986085779 U JP1986085779 U JP 1986085779U JP 8577986 U JP8577986 U JP 8577986U JP H0718643 Y2 JPH0718643 Y2 JP H0718643Y2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- endless belt
- elastic body
- driven roller
- roller
- 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.)
- Expired - Lifetime
Links
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Structure Of Belt Conveyors (AREA)
Description
【考案の詳細な説明】 （技術分野） 本考案はベルト支持装置、とくに、無端ベルトを張架支
持して走行させるベルト支持装置に関する。TECHNICAL FIELD The present invention relates to a belt supporting device, and more particularly to a belt supporting device that stretches and supports an endless belt for traveling.
（従来技術） 従来無端ベルトを複数本のローラに張架支持して、無端
ベルトを走行させるベルト走行装置は、第３図に示すよ
うに、無端ベルト１が駆動源からの駆動力がプーリを介
して伝達されて矢印方向に回転駆動される駆動ローラ２
と、複数本の従動ローラ3,4,5とにより張架支持される
構造になっている。(Prior Art) Conventionally, as shown in FIG. 3, in a belt traveling device in which an endless belt is stretched and supported by a plurality of rollers to run the endless belt, as shown in FIG. Drive roller 2 that is transmitted via
And a plurality of driven rollers 3, 4 and 5 are stretched and supported.
このようなベルト走行装置では、張架支持されている無
端ベルトが矢印F,E方向に揺れながら蛇行する現象が起
こり、ベルト１に皴９が発生する恐れがある。In such a belt traveling device, there is a possibility that the endless belt which is stretched and supported meanders while swinging in the directions of arrows F and E, and wrinkles 9 may occur on the belt 1.
この蛇行を修正するためには、無端ベルトの端部を検知
して、外部に設けたアクチュエータによって、張架支持
しているローラを傾動させて、蛇行するベルトをローラ
上で滑らせて修正を図る方式がある。In order to correct this meandering, the end of the endless belt is detected, and an actuator provided outside tilts the roller that is stretched and supported, and the meandering belt is slid on the roller to correct it. There is a method to try.
このような滑りを利用した蛇行修正方式をとったベルト
走行装置ではローラと張り掛けた無端ベルトとは滑る必
要がある。そのためにローラを金属のローラにして滑り
易くすることが考えられる。しかし張り掛けたローラを
金属で形成すると、無端ベルトとローラ表面との間に介
在物、たとえば、無端ベルトをベルト状の感光体とした
場合に、そのベルト状の感光体と金属ローラとの間にキ
ャリヤやトナーが回り込むと、両者の間で介在物がサン
ドイッチされて、無端ベルト側に突起が発生してしま
う。無端ベルトをベルト状の感光体とした場合は、外表
面に形成された突起により潜像が乱されたり、ベルト状
感光体にクラックやピンホールを発生させたりする不都
合がある。In a belt traveling device that adopts such a meandering correction method that utilizes slippage, it is necessary for the roller and the endless belt that is stretched to slip. Therefore, it is possible to use a metal roller as the roller to make it slippery. However, when the roller stretched over is made of metal, an inclusion is present between the endless belt and the roller surface, for example, when the endless belt is a belt-shaped photoconductor, the belt-shaped photoconductor and the metal roller are separated from each other. When the carrier and toner wrap around, the inclusions are sandwiched between the two and a protrusion is generated on the endless belt side. When the endless belt is a belt-shaped photoconductor, there are disadvantages that protrusions formed on the outer surface disturb the latent image and cracks or pinholes are generated in the belt-shaped photoconductor.
これを解消するために掛け渡されたローラの表面を弾性
ゴムにすることが考えられるが、これでは無端ベルトと
ローラとの摩擦力が大きくなり過ぎてしまって、蛇行修
正のための滑りを発生させることが難しくなり、ベルト
１の蛇行する方向に皴９が発生してしまう不都合が発生
する問題点がある。In order to eliminate this, it is conceivable to use elastic rubber on the surface of the roller stretched over, but this causes the frictional force between the endless belt and the roller to become too large, causing slippage to correct the meandering. It becomes difficult to do so, and there is a problem that the wrinkles 9 are generated in the meandering direction of the belt 1.
（目的） 本考案は上記の問題点を解消したベルト支持装置を提供
することを目的とする。(Purpose) An object of the present invention is to provide a belt support device that solves the above problems.
（構成） 本考案は無端ベルトを張架支持する従動ローラの表面を
低摩擦弾性体で被覆したことにある。(Structure) The present invention resides in that the surface of the driven roller that stretches and supports the endless belt is covered with a low-friction elastic body.
本考案の一実施例を図面に基づいて説明する。An embodiment of the present invention will be described with reference to the drawings.
本実施例は、本考案をベルト状感光体ベルトを使用した
電子複写機のベルト走行装置に適用した例を示す。This embodiment shows an example in which the present invention is applied to a belt traveling device of an electronic copying machine using a belt-shaped photosensitive belt.
無端ベルト11は、駆動ローラ12と従動ローラ13,14,15に
よって、張架支持されている。この無端ベルト11として
は透過性ポリエステルフィルムからなるベルト基台上に
アルミニュームをアルミ蒸着し、その上に有機光半導体
物質がコーティングされた無端ベルト感光体が使用され
る。The endless belt 11 is stretched and supported by a driving roller 12 and driven rollers 13, 14, 15. As the endless belt 11, an endless belt photoreceptor in which aluminum is vapor-deposited on a belt base made of a transparent polyester film and an organic photo-semiconductor material is coated thereon is used.
この無端ベルト11は、支持基板10に回動自在に支持され
た従動ローラ13,14,15,16,17,18と、同じ支持基板10に
回動自在に支持された駆動ローラ12とに張架支持されて
いる。駆動ローラ12には、駆動モータ19からの駆動力が
伝導紐20を介して伝達されるようになっており、第２図
矢印方向に走行する。The endless belt 11 is stretched between driven rollers 13, 14, 15, 16, 17, 18 which are rotatably supported on the support substrate 10 and a drive roller 12 which is rotatably supported on the same support substrate 10. It is supported by a rack. The drive force from the drive motor 19 is transmitted to the drive roller 12 via the conductive cord 20, and the drive roller 12 travels in the direction of the arrow in FIG.
上記従動ローラ13,14,15,16,17,18は第１図に示すよう
な構成になっている。第１図においては、従動ローラ1
3,14,15,16,17,18のうち、従動ローラ13を代表して、そ
の構成を説明する。The driven rollers 13, 14, 15, 16, 17, 18 are constructed as shown in FIG. In FIG. 1, the driven roller 1
Among 3,14,15,16,17,18, the structure of the driven roller 13 will be described as a representative.
従動ローラ13は支持板10,10に回転軸13aを中心に回動自
在に支持されていて、そのローラの外筒13bの外周は弾
性ゴム23で被覆されており、その外側に無端ベルト11が
掛け回されている。この弾性ゴム23としては、低摩擦弾
性体、すなわち、ゴム硬度が硬度40のポリウレタンゴム
80％にテトラフルオロエチレンC2F4の重合体（テフロ
ン；商品名）20％の割合で混合した弾性体で形成してあ
る。The driven roller 13 is rotatably supported by the support plates 10 and 10 around a rotation shaft 13a, and the outer cylinder 13b of the roller is covered with an elastic rubber 23, and the endless belt 11 is provided on the outer side thereof. It is hung around. The elastic rubber 23 is a low-friction elastic body, that is, a polyurethane rubber having a rubber hardness of 40.
It is made of an elastic material in which 80% of a polymer of tetrafluoroethylene C 2 F 4 (Teflon; trade name) is mixed at a ratio of 20%.
そして、この弾性ゴム23は無端ベルト11との摩擦係数μ
がμ＝0.6以下に設定してある。The elastic rubber 23 has a friction coefficient μ with the endless belt 11.
Is set to μ = 0.6 or less.
本考案者は、従動ローラの周面に摩擦系数μがμ＝0.5
〜0.6でゴム硬度が40°の低摩擦弾性体を被覆し、その
外側に無端ベルト状感光体を掛け回して、その感光体の
表面に複写紙を給送し複写を行った場合と、同従動ロー
ラの周面に摩擦系数μがμ＝0.7〜0.8でゴム硬度が60°
の低摩擦弾性体を被覆し、その外側に無端ベルト状感光
体を掛け回して、その感光体の表面に複写紙を給送し複
写を行った場合とで、ベルトの寄り具合を実験したとこ
ろ、その結果は、第４図および第５図に示すように摩擦
系数μがμ＝0.7〜0.8でゴム硬度が60°の低摩擦弾性体
を被覆した場合には、無端ベルト状感光体の表面に波打
ちの高低の差が約0.25mmの幅で凹凸が発生するのに対し
て、摩擦系数μがμ＝0.5〜0.6でゴム硬度が40°の低摩
擦弾性体を被覆した場合には、感光体の表面に波打ちの
高低の差が約0.1mmの幅の凹凸が発生した。すなわち、
摩擦系数μがμ＝0.6以下の低摩擦弾性体を従動ローラ
の表面に被覆した場合は、無端ベルト感光体と、従動ロ
ーラとの間に適当な滑りが発生して、感光体表面に皴が
発生することが防止される。The present inventor has found that the friction system number μ is μ = 0.5 on the peripheral surface of the driven roller.
The same as when a low friction elastic body with a rubber hardness of 40 ° and a hardness of 40 ° is covered, an endless belt-shaped photoconductor is hung on the outside, and copy paper is fed to the surface of the photoconductor to perform copying. The friction coefficient μ on the peripheral surface of the driven roller is μ = 0.7-0.8 and the rubber hardness is 60 °.
The low friction elastic body was covered, the endless belt-shaped photoconductor was hung on the outer side, and the copy paper was fed to the surface of the photoconductor to make a copy. As shown in FIGS. 4 and 5, when the low friction elastic body having a friction coefficient μ of 0.7 to 0.8 and a rubber hardness of 60 ° is coated, the surface of the endless belt-shaped photoreceptor is On the other hand, unevenness is generated in the width difference of about 0.25 mm in waviness, while when a low friction elastic body with a friction coefficient of μ = 0.5 to 0.6 and a rubber hardness of 40 ° is coated, The surface of the body had irregularities with a difference in height of about 0.1 mm. That is,
When the surface of the driven roller is coated with a low friction elastic body with a friction coefficient μ of μ = 0.6 or less, appropriate slippage occurs between the endless belt photosensitive member and the driven roller, and the photosensitive member surface is wrinkled. It is prevented from occurring.
また、上記と同じ条件のものであって、従動ローラと感
光体との間に異物が侵入した場合の感光体の剥離、変形
具合は、次ぎのとおりである。In addition, under the same conditions as above, the degree of peeling and deformation of the photoconductor when a foreign substance enters between the driven roller and the photoconductor is as follows.
ゴム硬度が60°の場合は、感光体の表面に多くの変形が
起こり、剥離箇所も10カ所以上発生した。When the rubber hardness was 60 °, many deformations occurred on the surface of the photoconductor, and 10 or more peeling points were generated.
ゴム硬度が40°の場合は、感光体の表面に高さの低い変
形が発生するが、剥離箇所はない。When the rubber hardness is 40 °, the surface of the photoconductor is deformed at a low height, but there is no peeling point.
すなわち、無端ベルトと従動ローラとの間にトナーやキ
ャリヤなどが回り込んでも、弾性体がゴム硬度が硬度40
のポリウレタンゴムで形成されているので、弾性体の内
部にトナーやキャリヤなどの介在物がめり込み、無端ベ
ルトの表面に突起を発生させることがなくなる。さら
に、弾性体を無端ベルトとの摩擦係数μがμ＝0.6以下
の弾性体で構成したので、無端ベルトとローラとの間に
適当な滑りを発生させて張架支持させることができた。That is, even if toner, carrier, etc. wrap around between the endless belt and the driven roller, the elastic body has a rubber hardness of 40%.
Since it is formed of the polyurethane rubber, the inclusions such as toner and carrier do not penetrate into the inside of the elastic body, and no protrusion is generated on the surface of the endless belt. Further, since the elastic body is composed of an elastic body having a friction coefficient μ with the endless belt of μ = 0.6 or less, it is possible to generate an appropriate slip between the endless belt and the roller to support the endless belt in a stretched state.
従動ローラ13を被覆する弾性ゴム23としては、上記実施
例の他に、ゴム硬度が硬度40のポリウレタンゴム75％、
テトラフルオロエチレンC2F4の重合体20％、カーボン５
％の割合で混合した、導電性を有するもので形成しても
よい。弾性ゴムをこのように構成した場合でも、上記実
施例と同様な実験結果が得られた。また弾性ゴムをこの
ように導電性を有するもので形成すれば、無端ベルト11
と従動ローラ13との間で滑りが発生し、無端ベルトと従
動ローラとの間に静電気が発生しても、導電性を有する
従動ローラ13を介して静電気を逃すことができ、無端ベ
ルトを張り替えるときに、放電を発生させることがなく
なる。As the elastic rubber 23 for covering the driven roller 13, in addition to the above-mentioned embodiment, 75% polyurethane rubber having a rubber hardness of 40,
Tetrafluoroethylene C 2 F 4 polymer 20%, carbon 5
You may form with what has electroconductivity mixed in the ratio of%. Even when the elastic rubber was constructed in this way, the same experimental results as those in the above-mentioned examples were obtained. In addition, if the elastic rubber is formed of such a conductive material, the endless belt 11
Even if static electricity occurs between the endless belt and the driven roller due to slippage between the driven roller 13 and the driven roller 13, static electricity can be dissipated through the driven roller 13 having conductivity, and the endless belt can be replaced. No discharge is generated when
（効果） 本考案によれば、張架されている無端ベルトに蛇行が発
生しても、無端ベルトと従動ローラとの間に滑りが発生
し、蛇行を速やかに修正することができ、さらにベルト
の裏側にキャリヤなどの介在物が回り込んでも、介在物
が弾性体内にめり込み、ベルト表面に突起などを起こさ
せず、ベルト感光体にクラックやピンホールを発生させ
ることがなくなり、耐久性に富んだベルト走行装置を得
ることができる。(Effect) According to the present invention, even if the endless belt stretched over has meandered, slippage occurs between the endless belt and the driven roller, and the meandering can be quickly corrected. Even if inclusions such as a carrier wrap around on the back side of the product, the inclusions will slip into the elastic body and will not cause protrusions on the belt surface, and it will not cause cracks or pinholes on the belt photosensitive member and is highly durable. The belt running device can be obtained.
第１図は本考案の一実施例を示すベルト支持装置の縦断
面図、第２図は上記ベルト支持装置が装着されたベルト
走行装置の概略側面図、第３図は従来のベルト走行装置
の一例を示す斜視図、第４図は従動ローラの周面に摩擦
系数μがμ＝0.7〜0.8でゴム硬度が60°の低摩擦弾性体
を被覆し、その外側に無端ベルト状感光体を掛け回し
て、その感光体の表面に複写紙を給送し複写を行った場
合の感光体表面上に表れる波打ち具合の変化状態を示す
グラフ、第５図は従動ローラの周面に摩擦系数μがμ＝
0.5〜0.6でゴム硬度が40°の低摩擦弾性体を被覆し、そ
の外側に無端ベルト状感光体を掛け回して、その感光体
の表面に複写紙を給送し複写を行った場合の感光体表面
上に表れる波打ち具合の変化状態を示すグラフである。 11…無端ベルト感光体、13,14,15,16,17,18…従動ロー
ラ、23…低摩擦弾性体。FIG. 1 is a vertical sectional view of a belt supporting device showing an embodiment of the present invention, FIG. 2 is a schematic side view of a belt traveling device equipped with the belt supporting device, and FIG. 3 is a conventional belt traveling device. FIG. 4 is a perspective view showing an example, in which a peripheral surface of a driven roller is covered with a low friction elastic body having a friction coefficient of μ = 0.7 to 0.8 and a rubber hardness of 60 °, and an endless belt-shaped photosensitive member is hung on the outer side thereof. FIG. 5 is a graph showing the changing state of the corrugation appearing on the surface of the photoconductor when a copy sheet is fed to the surface of the photoconductor to make a copy, and FIG. 5 shows the friction system number μ on the peripheral surface of the driven roller. μ =
A low-friction elastic body with a rubber hardness of 0.5 to 0.6 and a hardness of 40 ° is covered, an endless belt-shaped photoconductor is hung on the outside, and a copy paper is fed to the surface of the photoconductor to expose it to light. It is a graph which shows the change state of the corrugation degree which appears on a body surface. 11 ... Endless belt photoreceptor, 13,14,15,16,17,18 ... Following roller, 23 ... Low friction elastic body.
Claims (3)
張架支持して、上記ベルトを走行させるベルト走行装置
において、上記従動ローラを無端ベルトと従動ローラと
の間に適当な滑りを発生させるために、ゴム硬度が硬度
40のポリウレタンゴムにテトラフルオロエチレンC2F4の
重合体とカーボンとを混合した摩擦係数μがμ＝0.6以
下の導電性低摩擦弾性体で被覆したことを特徴とするベ
ルト支持装置。1. In a belt running device for running an endless belt stretched and supported by a driving roller and a driven roller, the driven roller causes a proper slip between the endless belt and the driven roller. Because the rubber hardness is
A belt support device characterized in that 40 polyurethane rubber is coated with a conductive low friction elastic body having a friction coefficient μ of μ = 0.6 or less, which is obtained by mixing a polymer of tetrafluoroethylene C 2 F 4 and carbon.
リウレタンゴム75％にテトラフルオロエチレンC2F4の重
合体20％、カーボン５％の割合で混合した導電性低摩擦
弾性体であることを特徴とする実用新案登録請求の範囲
第１項記載のベルト支持装置。2. The conductive low-friction elastic body is a conductive low-friction elastic body prepared by mixing 75% of polyurethane rubber having a rubber hardness of 40 with 20% of a polymer of tetrafluoroethylene C 2 F 4 and 5% of carbon. The belt support device according to claim 1, wherein the belt support device is a utility model registration device.
に、アルミニュームをアルミ蒸着し、その上に有機光半
導体物質をコーティングした無端ベルト感光体であるこ
とを特徴とする実用新案登録請求の範囲第１項または第
２項記載のベルト支持装置。3. The utility model registration claim, wherein the endless belt is an endless belt photoreceptor in which aluminum is vapor-deposited on a polyester film, and an organic photo-semiconductor material is coated thereon. The belt support device according to item 2 or item 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986085779U JPH0718643Y2 (en) | 1986-06-05 | 1986-06-05 | Belt support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986085779U JPH0718643Y2 (en) | 1986-06-05 | 1986-06-05 | Belt support device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62197609U JPS62197609U (en) | 1987-12-16 |
| JPH0718643Y2 true JPH0718643Y2 (en) | 1995-05-01 |
Family
ID=30941493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986085779U Expired - Lifetime JPH0718643Y2 (en) | 1986-06-05 | 1986-06-05 | Belt support device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0718643Y2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925885B2 (en) * | 1980-12-24 | 1984-06-22 | 住友ゴム工業株式会社 | rubber roller |
| JPS57162213U (en) * | 1981-04-07 | 1982-10-13 | ||
| JPS58110649U (en) * | 1982-01-22 | 1983-07-28 | 株式会社リコー | Belt running position correction device |
| JPS6050649U (en) * | 1983-09-13 | 1985-04-09 | 北辰工業株式会社 | Paper transport roller |
-
1986
- 1986-06-05 JP JP1986085779U patent/JPH0718643Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62197609U (en) | 1987-12-16 |
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