JPH04303854A - Endless elastic belt - Google Patents
Endless elastic beltInfo
- Publication number
- JPH04303854A JPH04303854A JP3093065A JP9306591A JPH04303854A JP H04303854 A JPH04303854 A JP H04303854A JP 3093065 A JP3093065 A JP 3093065A JP 9306591 A JP9306591 A JP 9306591A JP H04303854 A JPH04303854 A JP H04303854A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- endless elastic
- coating film
- elastic belt
- conductive coating
- 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.)
- Pending
Links
- 239000011248 coating agent Substances 0.000 claims description 28
- 238000000576 coating method Methods 0.000 claims description 28
- 229920001971 elastomer Polymers 0.000 abstract description 9
- 239000005060 rubber Substances 0.000 abstract description 9
- 239000003093 cationic surfactant Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003945 anionic surfactant Substances 0.000 abstract description 2
- 239000002736 nonionic surfactant Substances 0.000 abstract description 2
- 239000012799 electrically-conductive coating Substances 0.000 abstract 3
- 125000002091 cationic group Chemical group 0.000 abstract 1
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 229920005749 polyurethane resin Polymers 0.000 abstract 1
- 239000010408 film Substances 0.000 description 23
- 239000004094 surface-active agent Substances 0.000 description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012789 electroconductive film Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Belt Conveyors (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、電子写真複写機の自
動原稿送り部等に用いられる無端弾性ベルトに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless elastic belt used in an automatic document feeding section of an electrophotographic copying machine.
【０００２】0002
【従来の技術】最近、複数枚の原稿を連続的に複写でき
る電子写真複写機が出回つている。この複写機は、図２
に示すように、複写機１の本体上部に設けられている原
稿用載置台２に複数枚の原稿３を下向きに載せ原稿台カ
バー４を手前に倒してスイツチ（図示せず）を押すだけ
で、原稿台カバー４の裏面に設けられた白色ゴム製の無
端弾性ベルト６が矢印のように移動して、原稿用載置台
２上の原稿３を上から１枚ずつ原稿台ガラス５上に搬送
して連続的にコピーができるようになつている。2. Description of the Related Art Recently, electrophotographic copying machines that can continuously copy a plurality of original documents have been on the market. This copying machine is shown in Figure 2.
As shown in , simply place a plurality of originals 3 face down on the original placing table 2 provided at the top of the main body of the copying machine 1, tilt the original table cover 4 toward you, and press the switch (not shown). , an endless elastic belt 6 made of white rubber provided on the back side of the document table cover 4 moves in the direction of the arrow, and conveys the documents 3 on the document table 2 one by one onto the document table glass 5 from above. It is now possible to make continuous copies.
【０００３】上記無端弾性ベルト６の駆動は、通常、図
３に示すように、左右２個の金属性駆動ローラ７によつ
て行われており、この左右の駆動ローラ７間に、その軸
方向に沿つて所定間隔でピンチローラ８が並設されて無
端弾性ベルト６と原稿３との摩擦力を大きくしている。The endless elastic belt 6 is normally driven by two metal drive rollers 7 on the left and right, as shown in FIG. Pinch rollers 8 are arranged in parallel at predetermined intervals along the belt to increase the frictional force between the endless elastic belt 6 and the document 3.
【０００４】このような自動原稿供給方式では、図３に
示すように、無端弾性ベルト６の裏面側と駆動ローラ７
，ピンチローラ８との間で剥離帯電が生じ、また無端弾
性ベルト６の表側（搬送面側）と原稿３およびガラス５
との間で摩擦帯電が生じるため、給紙を繰り返すにつれ
て、無端弾性ベルト６の両面に帯電電荷が溜まつて静電
気となり、ベルト搬送面から原稿３が離れにくくなり、
原稿３が原稿台ガラス５を通過してしまつたり、定位置
まで達しなかつたり、一旦原稿台ガラス５の上に載つた
原稿３がガラス５の表面に吸着して複写後に搬送回収で
きないというトラブルが生じる。In such an automatic document feeding system, as shown in FIG.
, pinch roller 8, and the front side (conveying surface side) of the endless elastic belt 6, the document 3, and the glass 5.
Frictional charging occurs between the belt and the endless elastic belt 6, so as the paper is repeatedly fed, the charges accumulate on both sides of the endless elastic belt 6 and become static electricity, making it difficult for the original 3 to separate from the belt conveying surface.
Problems such as the original 3 passing through the original platen glass 5 or not reaching the fixed position, or the original 3 once placed on the original platen glass 5 being stuck to the surface of the glass 5 and unable to be transported and recovered after copying. occurs.
【０００５】[0005]
【発明が解決しようとする課題】そこで、上記無端弾性
ベルト６の帯電を防止するために、ベルト６内に、カー
ボンブラツク，金属粉等の導電性粉末を分散含有させる
ことや、界面活性剤を配合することが試みられている。
しかし、上記導電性粉末は、黒色あるいは濃色であり、
本来、原稿３の背景として高い白色度が要求されるベル
ト６において、上記のような導電性粉末を含有させるこ
とは好ましくない。また、上記導電性粉末を分散含有さ
せると、ベルト６の摩擦特性や弾性率がゴム本来の特性
から変化してしまうため、紙送りのトラブルが生じやす
いという問題もある。一方、上記界面活性剤は、その効
果が長く持続せず、またブリード現象によつてベルト６
表面がべたついて原稿３や原稿台ガラス５を汚すという
欠点を有している。このため、ベルト６自体に帯電防止
機能を具備させることはむずかしいと判断され、従来は
、除電ブラシをベルト６の搬送面Ａに圧接する等して帯
電除去を行つている。しかし、その除電効果はベルト６
の表側に限られており、裏面側の帯電については殆ど効
果のないものであつた。[Problems to be Solved by the Invention] Therefore, in order to prevent the endless elastic belt 6 from being charged, conductive powder such as carbon black or metal powder may be dispersed in the belt 6, or a surfactant may be added. Attempts are being made to combine them. However, the above conductive powder is black or dark colored,
Originally, it is not preferable for the belt 6, which requires high whiteness as the background of the original document 3, to contain the above-mentioned conductive powder. Further, when the conductive powder is dispersed and contained, the frictional characteristics and elastic modulus of the belt 6 change from the original characteristics of rubber, which causes problems in paper feeding. On the other hand, the above-mentioned surfactants do not maintain their effects for a long time, and also cause the belt to bleed due to the bleed phenomenon.
It has the disadvantage that the surface becomes sticky and stains the document 3 and the document table glass 5. For this reason, it has been judged that it is difficult to provide the belt 6 itself with an antistatic function, and conventionally, static electricity is removed by pressing a static eliminating brush against the conveying surface A of the belt 6. However, the static elimination effect of the belt 6
The charge was limited to the front side of the screen, and had almost no effect on charging the back side.
【０００６】この発明は、このような事情に鑑みなされ
たもので、ベルト搬送面の特性を損なうことなく帯電防
止処理が施された無端弾性ベルトの提供をその目的とす
る。The present invention was made in view of the above circumstances, and an object of the present invention is to provide an endless elastic belt that is subjected to antistatic treatment without impairing the characteristics of the belt conveying surface.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
め、この発明の無端弾性ベルトは、搬送面の裏面に、導
電性塗膜が形成されているという構成をとる。[Means for Solving the Problems] In order to achieve the above object, the endless elastic belt of the present invention has a structure in which a conductive coating film is formed on the back surface of the conveying surface.
【０００８】したがつて、この無端弾性ベルトを電子写
真複写機の自動原稿送りに用いた場合、上記裏面の導電
性塗膜の存在によつて、ベルトとローラの間に剥離帯電
が生じることがない。また、ベルト表側の帯電電荷も、
上記導電性塗膜を通つて駆動ローラ側に逃げるため、ベ
ルト全体に帯電が生じることなく、原稿送りがスムーズ
に行われる。しかも、上記導電性塗膜はベルト裏面側に
だけ形成されているため、ベルトの搬送面はベルト本来
の特性が維持されており、搬送トラブル等が生じること
もない。[0008] Therefore, when this endless elastic belt is used for automatic document feeding in an electrophotographic copying machine, the presence of the conductive coating film on the back side may cause separation charging between the belt and the roller. do not have. In addition, the electrical charge on the front side of the belt is
Since the electroconductive film escapes to the drive roller side through the conductive coating, the entire belt is not charged, and the document can be fed smoothly. Moreover, since the conductive coating film is formed only on the back side of the belt, the original characteristics of the belt are maintained on the conveying surface of the belt, and no conveyance troubles occur.
【０００９】つぎに、この発明を詳細に説明する。Next, the present invention will be explained in detail.
【００１０】この発明の無端弾性ベルトは、図１に示す
ように、通常のベルト部１１と、その裏面（搬送面と反
対側の面）に形成された薄膜状の導電性塗膜１２とを備
えている。そして、その全体形状は、図４に示す無端弾
性ベルト６と同様で、環状無端になつている。As shown in FIG. 1, the endless elastic belt of the present invention includes a normal belt portion 11 and a thin conductive coating film 12 formed on the back surface (the surface opposite to the conveying surface). We are prepared. The overall shape is similar to the endless elastic belt 6 shown in FIG. 4, and is an endless annular belt.
【００１１】上記通常のベルト部１１は、従来から無端
弾性ベルトに用いられるゴム材または帆布入りウレタン
樹脂によつて形成される。このようなゴム材としては、
例えばエチレン−プロピレンゴム（ＥＰＲ），エチレン
−プロピレン−ジエンゴム（ＥＰＤＭ），天然ゴム（Ｎ
Ｒ），スチレン−ブタジエンゴム（ＳＢＲ），イソブチ
レン−イソプロピレンゴム（ＩＩＲ），ブタジエンゴム
（ＢＲ）等があげられる。The normal belt portion 11 is made of a rubber material or canvas-containing urethane resin that has been conventionally used in endless elastic belts. As such rubber materials,
For example, ethylene-propylene rubber (EPR), ethylene-propylene-diene rubber (EPDM), natural rubber (N
R), styrene-butadiene rubber (SBR), isobutylene-isopropylene rubber (IIR), butadiene rubber (BR), and the like.
【００１２】また、上記導電性塗膜１２は、導電性を有
し電荷を通しやすい導電物質を用いて形成される。上記
導電物質としては、カチオン系界面活性剤，ノニオン系
界面活性剤，アニオン系界面活性剤等があげられ、なか
でもカチオン系界面活性剤が好適である。また、上記の
ような界面活性剤に代えて、アルミニウム，金，銀，銅
等の金属を用いるようにしてもよい。そして、上記導電
物質を選択する場合には、形成される導電性塗膜１２の
表面電気抵抗が１０１２Ω以下となるようなものを選択
することが、効果の上から好適である。[0012] The conductive coating film 12 is formed using a conductive material that has conductivity and easily conducts charge. Examples of the conductive substance include cationic surfactants, nonionic surfactants, and anionic surfactants, with cationic surfactants being preferred. Further, instead of the above surfactants, metals such as aluminum, gold, silver, copper, etc. may be used. When selecting the above-mentioned conductive material, it is preferable from the viewpoint of effectiveness to select one such that the surface electrical resistance of the conductive coating film 12 formed is 10<12>Ω or less.
【００１３】上記導電性塗膜１２は、導電物質として界
面活性剤を用いる場合、例えばつぎのようにして形成さ
れる。まず、上記ゴム材を用いて、従来公知の方法によ
つて無端弾性ベルト６のベルト部１１を形成する。つぎ
に、上記ベルト部１１の裏面側に、適宜の濃度にトルエ
ン等で調製された界面活性剤溶液を塗布して乾燥する。
ベルト部１１の裏面に、トルエン溶液等を塗布すると、
膨潤によつて塗布面が粗面となり、形成される界面活性
剤塗膜１２がベルト部１１の裏面と強固に接合して経時
的に脱落することがない。また、界面活性剤溶液の塗布
量は、乾燥後の界面活性剤塗膜１２の厚みが０．０１〜
２．０μｍとなるように設定することが好適で、なかで
も０．０５〜１．０μｍとなるように設定することがさ
らに好適である。塗膜厚みが０．０１μｍ未満では、得
られた無端弾性ベルト６を使用した場合に、駆動ローラ
７（図３参照）との摩擦により塗膜１２が摩耗して帯電
防止効果が長時間持続しないからである。逆に塗膜厚み
が２．０μｍを超えると、無端弾性ベルト６を使用した
場合に塗膜１２にひびが生じて脱落しやすくなるからで
ある。[0013] When a surfactant is used as the conductive substance, the conductive coating film 12 is formed, for example, in the following manner. First, the belt portion 11 of the endless elastic belt 6 is formed using the above rubber material by a conventionally known method. Next, a surfactant solution prepared with toluene or the like to an appropriate concentration is applied to the back side of the belt portion 11 and dried. When a toluene solution or the like is applied to the back side of the belt portion 11,
The coating surface becomes rough due to the swelling, and the formed surfactant coating film 12 is firmly bonded to the back surface of the belt portion 11 and does not fall off over time. Further, the coating amount of the surfactant solution is such that the thickness of the surfactant coating film 12 after drying is 0.01~
It is preferable to set the thickness to 2.0 μm, and more preferably to set it to 0.05 to 1.0 μm. If the coating film thickness is less than 0.01 μm, when the obtained endless elastic belt 6 is used, the coating film 12 will wear out due to friction with the drive roller 7 (see FIG. 3), and the antistatic effect will not last for a long time. It is from. On the other hand, if the coating film thickness exceeds 2.0 μm, the coating film 12 will crack and easily fall off when the endless elastic belt 6 is used.
【００１４】また、導電物質として金属を用いる場合に
は、塗膜形成を、真空蒸着，スパツタリング，イオンプ
レーテイング等によつて行う。このときも、塗膜厚みを
上記と同様の範囲内に設定することが好ましい。Further, when a metal is used as the conductive substance, the coating film is formed by vacuum evaporation, sputtering, ion plating, or the like. Also at this time, it is preferable to set the coating film thickness within the same range as above.
【００１５】このようにして得られた無端弾性ベルト６
は、電子写真複写機の自動原稿送りに用いると、その裏
面に導電性塗膜が形成されているため、ベルト６と駆動
ローラ７の間に剥離帯電が生じることがない。また、ベ
ルト６表側の帯電電荷も、上記導電性塗膜１２を通つて
駆動ローラ７側に逃げるため、ベルト６全体に帯電が生
じることなく、原稿送りがスムーズに行われる。しかも
、上記導電性塗膜１２は裏面側にだけ形成されているた
め、ベルト６の搬送面ではベルト部１１を形成するゴム
材の特性が発揮され、搬送トラブル等が生じることもな
い。Endless elastic belt 6 thus obtained
When used for automatic document feeding in an electrophotographic copying machine, since a conductive coating film is formed on the back surface of the belt 6, no peeling charge occurs between the belt 6 and the drive roller 7. In addition, the charges on the front side of the belt 6 also escape to the drive roller 7 side through the conductive coating film 12, so that the entire belt 6 is not electrically charged, and the document can be fed smoothly. Furthermore, since the conductive coating film 12 is formed only on the back side, the characteristics of the rubber material forming the belt portion 11 are exhibited on the conveyance surface of the belt 6, and conveyance troubles do not occur.
【００１６】つぎに、実施例について比較例と併せて説
明する。Next, examples will be explained together with comparative examples.
【００１７】[0017]
【実施例１〜７、比較例１〜２】ベルト部１１の材料と
してＥＰＤＭを用い、下記の表１〜表３に示す条件で無
端弾性ベルト６を得た。そして、得られた各無端弾性ベ
ルト６の体積固有抵抗，表面（搬送面Ａ）固有抵抗，裏
面固有抵抗をキスレ式抵抗計（キスレー社製）で測定し
た。また、各無端弾性ベルト６を、図２に示すような複
写機１の自動原稿送り部に組み込んで１０００枚の紙送
りを行い、搬送不良枚数をカウントした。これらの結果
を、下記の表１〜３に併せて示す。[Examples 1 to 7, Comparative Examples 1 to 2] EPDM was used as the material for the belt portion 11, and an endless elastic belt 6 was obtained under the conditions shown in Tables 1 to 3 below. Then, the volume resistivity, surface (conveying surface A) resistivity, and back surface resistivity of each of the obtained endless elastic belts 6 were measured using a Kisley resistance meter (manufactured by Kisley Co., Ltd.). Furthermore, each endless elastic belt 6 was incorporated into the automatic document feeder of the copying machine 1 as shown in FIG. 2, and 1000 sheets of paper were fed, and the number of failed sheets was counted. These results are also shown in Tables 1 to 3 below.
【００１８】[0018]
【表１】[Table 1]
【００１９】[0019]
【表２】[Table 2]
【００２０】[0020]
【表３】[Table 3]
【００２１】上記の結果から、実施例品は、いずれも比
較例品に比べて優れた紙送り性を示し、静電気が生じに
くいことがわかる。[0021] From the above results, it can be seen that all of the Example products exhibited superior paper feeding properties compared to the Comparative Example products, and were less likely to generate static electricity.
【００２２】[0022]
【発明の効果】以上のように、この発明の無端弾性ベル
トは、搬送面の裏面に所定厚みの導電性塗膜が形成され
ているため、この無端弾性ベルトを電子写真複写機の自
動原稿送りに用いた場合、上記裏面の導電性塗膜の存在
によつて、ベルトとローラの間に剥離帯電が生じること
がない。また、ベルト表側の帯電電荷も、上記導電性塗
膜を通つて駆動ローラ側に逃げるため、ベルト全体に帯
電が生じることなく、原稿送りがスムーズに行われる。
しかも、上記導電性塗膜はベルト裏面側にだけ形成され
ているため、ベルトの搬送面はベルト本来のゴム特性が
維持されており、搬送トラブル等が生じない。As described above, since the endless elastic belt of the present invention has a conductive coating film of a predetermined thickness formed on the back side of the conveying surface, this endless elastic belt can be used for automatic document feeding in electrophotographic copying machines. When the belt is used in the belt, due to the presence of the conductive coating film on the back side, no separation charge occurs between the belt and the roller. Further, since the electrical charges on the front side of the belt also escape to the drive roller side through the conductive coating film, the entire belt is not electrically charged, and the document can be fed smoothly. Moreover, since the conductive coating film is formed only on the back side of the belt, the conveying surface of the belt maintains its original rubber properties, and no conveyance troubles occur.
【図１】この発明の一実施例を示す部分的な断面図であ
る。FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention.
【図２】複写機の斜視図である。FIG. 2 is a perspective view of the copying machine.
【図３】無端弾性ベルトの部分的な拡大斜視図である。FIG. 3 is a partially enlarged perspective view of the endless elastic belt.
６ 無端弾性ベルト １１ ベルト部 １２ 導電性塗膜 6 Endless elastic belt 11 Belt part 12 Conductive coating film
Claims (2)
れていることを特徴とする無端弾性ベルト。1. An endless elastic belt, characterized in that a conductive coating film is formed on the back surface of the conveyance surface.
表面抵抗値が１０１２Ω以下に設定されている無端弾性
ベルト。2. An endless elastic belt, wherein the surface resistance value of the side on which the conductive coating film is formed is set to 10 12 Ω or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093065A JPH04303854A (en) | 1991-03-30 | 1991-03-30 | Endless elastic belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093065A JPH04303854A (en) | 1991-03-30 | 1991-03-30 | Endless elastic belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04303854A true JPH04303854A (en) | 1992-10-27 |
Family
ID=14072115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3093065A Pending JPH04303854A (en) | 1991-03-30 | 1991-03-30 | Endless elastic belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04303854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8541089B2 (en) | 2006-07-26 | 2013-09-24 | Ricoh Company, Ltd. | Fixing belt, base element for fixing belt, fixing device, image forming apparatus and method for producing base element |
-
1991
- 1991-03-30 JP JP3093065A patent/JPH04303854A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8541089B2 (en) | 2006-07-26 | 2013-09-24 | Ricoh Company, Ltd. | Fixing belt, base element for fixing belt, fixing device, image forming apparatus and method for producing base element |
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