JPH04256644A - Lifetime sensing device for sheet transporting roller - Google Patents
Lifetime sensing device for sheet transporting rollerInfo
- Publication number
- JPH04256644A JPH04256644A JP3015277A JP1527791A JPH04256644A JP H04256644 A JPH04256644 A JP H04256644A JP 3015277 A JP3015277 A JP 3015277A JP 1527791 A JP1527791 A JP 1527791A JP H04256644 A JPH04256644 A JP H04256644A
- Authority
- JP
- Japan
- Prior art keywords
- paper feed
- roller
- feed roller
- paper
- sheet transporting
- 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
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、紙搬送ロ−ラ、特に画
像形成装置の給紙ロ−ラの寿命検知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifespan detecting device for a paper conveyance roller, particularly a paper feed roller of an image forming apparatus.
【０００２】0002
【従来の技術】紙搬送ロ−ラ、特に画像形成装置の給紙
ロ−ラは、積載された紙をさばく機能を有するため、高
摩擦係数の材料、例えばゴム材料よりなることを必要と
する。しかし、一般的に、高摩擦係数のゴム材料は摩耗
に対し不利となることを免れない。更に、給紙ロ−ラの
紙をさばくための使用条件は苛酷であり、給紙ロ−ラに
は正確な給紙を行うため摩耗に対し厳しい要求がなされ
る。このような要求に応えるため、プリント速度の速い
装置または高寿命の装置では、定期的に給紙ロ−ラを交
換するのが一般的である。この場合の定期的なロ−ラの
交換の時期は、プリント枚数で管理することが多い。給
紙口が複数個ある場合は、それぞれの給紙口から平均し
て給紙されるとは限らないため、各給紙口における給紙
ロ−ラの摩耗量は異なっているのが普通であるが、しか
し給紙口毎に給紙枚数を管理するのは困難である。また
、給紙する紙のサイズによっても、給紙ロ−ラの摩耗量
は異なってくる。2. Description of the Related Art Paper conveyance rollers, especially paper feed rollers of image forming apparatuses, have the function of separating stacked papers, and therefore need to be made of a material with a high coefficient of friction, such as a rubber material. . However, in general, rubber materials with a high coefficient of friction are disadvantageous in terms of wear. Furthermore, the conditions under which the paper feed roller is used for handling paper are severe, and strict requirements are placed on the paper feed roller against wear in order to feed the paper accurately. In order to meet such demands, it is common for devices with high printing speeds or devices with long lifespans to periodically replace the paper feed roller. In this case, the timing of regular roller replacement is often managed based on the number of prints. When there are multiple paper feed slots, the amount of wear on the paper feed rollers at each paper feed slot is usually different because the paper is not necessarily fed evenly from each paper feed slot. However, it is difficult to manage the number of sheets fed for each paper feed port. Furthermore, the amount of wear on the paper feed roller varies depending on the size of the paper being fed.
【０００３】従来は、前述せる給紙ロ−ラの摩耗のばら
つきを無視し、最悪条件を想定したト−タルプリント枚
数で交換時期を設定している場合が多い。その他の方式
としては、多数枚送りや不送りなどの給紙不良が発生し
てから交換するものがある。Conventionally, the above-mentioned variation in paper feed roller wear is ignored, and the replacement period is often set based on the total number of prints assuming the worst-case conditions. Another method is to replace the paper after a paper feeding failure occurs such as multiple paper feeding or non-feeding.
【０００４】0004
【発明が解決しようとする課題】前記のト−タルプリン
ト枚数で給紙ロ−ラの交換時期を設定するものは、ロ−
ラ自体の寿命を検知できないためであるが、摩耗のばら
つきを考慮して本来の寿命よりも早めに交換を行ってい
るので、ユ−ザに無駄な出費を強いることとなっている
。また、給紙不良が実際に発生してから交換するものは
、ユ−ザに不便の生ずることを免れない。このように、
従来は給紙ロ−ラの交換をロ−ラの寿命に対し適時に行
うことが非常に困難であった。[Problems to be Solved by the Invention] The paper feed roller replacement timing is set based on the total number of prints as described above.
This is because the lifespan of the rubber itself cannot be detected, but due to variations in wear, replacement is performed earlier than the original lifespan, forcing the user to waste money. Furthermore, replacing the paper after a paper feeding failure actually occurs will inevitably cause inconvenience to the user. in this way,
Conventionally, it has been extremely difficult to replace the paper feed roller in a timely manner during the life of the roller.
【０００５】本発明は、紙搬送ロ−ラ特に給紙ロ−ラの
交換に際しての前述の不都合をなくすことを課題とする
。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned inconveniences when replacing the paper transport roller, particularly the paper feed roller.
【０００６】[0006]
【課題を解決するための手段】前記の課題は、本発明に
より、紙搬送ロ−ラの表層にこの表層の色とは異なる色
の部分を有し、この部分の深さがほぼ紙搬送ロ−ラの許
容摩耗量となっていることにより解決される。[Means for Solving the Problems] According to the present invention, the surface layer of the paper transport roller has a portion whose color is different from that of the surface layer, and the depth of this portion is approximately the same as that of the paper transport roller. This problem is solved by ensuring that the wear amount is within the allowable amount of -ra.
【０００７】また、本発明は、前記の課題の解決のため
に、前記異なる色の部分を検知するセンサを設けること
を提案する。[0007] Furthermore, in order to solve the above-mentioned problems, the present invention proposes to provide a sensor for detecting the different colored parts.
【０００８】さらに、本発明は、前記の課題の解決のた
めに、前記異なる色の部分が複数個であり、紙搬送ロ−
ラの回転方向に非連続的に配置されていることを提案す
る。Furthermore, in order to solve the above-mentioned problems, the present invention includes a plurality of portions of different colors, and a paper conveyance roller.
We propose that they be arranged discontinuously in the direction of rotation of the la.
【０００９】[0009]
【作用】紙搬送ロ−ラ、特に給紙ロ−ラの表層に設けた
異なる色の部分がロ−ラ表面の摩滅とともに摩滅する。
該部分の深さはほぼ給紙ロ−ラ表面の許容摩耗量である
から、該部分が消失したときは、給紙ロ−ラの摩耗が許
容値を超えたことになる。この異なる色の部分の消失を
、例えばセンサにより検知することにより、給紙ロ−ラ
の交換時期を知ることが出来る。。[Operation] The different colored portions provided on the surface of the paper conveyance roller, especially the paper feed roller, wear out as the roller surface wears down. Since the depth of this portion is approximately the allowable amount of wear on the paper feed roller surface, when this portion disappears, it means that the wear of the paper feed roller has exceeded the allowable value. By detecting the disappearance of the different colored portions using, for example, a sensor, it is possible to know when to replace the paper feed roller. .
【００１０】0010
【実施例】以下に、本発明を画像形成装置の給紙装置に
適用した実施例について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a paper feeding device of an image forming apparatus will be described below.
【００１１】図１において、給紙ロ−ラ１の色はグレ−
であり、その表層にグレ−色とは異なる色の複数個の部
分２が設けられている。給紙ロ−ラ１は、軸Ａ−Ａ’を
中心として回転する。部分２は、給紙ロ−ラ１の外周上
にその回転方向に等間隔で非連続的に配置されている。
部分２は、給紙ロ−ラ１の表層に例えば多色成型により
黒で成型することができる。これらの部分２を検知する
反射式フォトインタラプタ３が設けてあり、その光軸４
は部分２の回転通路を指向している。In FIG. 1, the color of the paper feed roller 1 is gray.
A plurality of portions 2 of a color different from gray are provided on the surface layer. The paper feed roller 1 rotates around an axis AA'. The portions 2 are disposed discontinuously on the outer periphery of the paper feed roller 1 at regular intervals in the direction of rotation thereof. The portion 2 can be molded in black on the surface layer of the paper feed roller 1, for example, by multicolor molding. A reflective photointerrupter 3 is provided to detect these portions 2, and its optical axis 4
points toward the rotation path of part 2.
【００１２】黒で成型された部分２の深さは、図２に示
すように、給紙ロ−ラ１の表面から許容可能な摩耗量ｄ
ｍｍとなっている。As shown in FIG. 2, the depth of the black molded portion 2 is determined by the allowable wear amount d from the surface of the paper feed roller 1.
mm.
【００１３】給紙装置の作動時給紙ロ−ラ１が回転する
と、給紙ロ−ラ１の摩耗量がまだ許容値以内である場合
、給紙ロ−ラ１の表面のグレ−色と部分２の黒色とがフ
ォトインタラプタ３の光軸４上に交互に現われる。その
際、グレ−色の反射率が高いのに対し、黒色の反射率が
低いので、フォトインタラプタ３からの信号は、図３に
示すように、Ｈｉ とＬｏ が交互に現出する波形とな
る。When the paper feed roller 1 rotates during operation of the paper feed device, if the wear amount of the paper feed roller 1 is still within the allowable value, the gray color and portion of the surface of the paper feed roller 1 will change. 2 and black appear alternately on the optical axis 4 of the photointerrupter 3. At this time, since the reflectance of gray is high while the reflectance of black is low, the signal from the photointerrupter 3 has a waveform in which Hi and Lo appear alternately, as shown in FIG. .
【００１４】給紙ロ−ラ１の摩耗が進み、その摩耗量が
許容値ｄｍｍ 以上になると、部分２の深さはｄｍｍ
しかないので、部分２従ってその黒色が給紙ロ−ラ１の
表面から消失する。このため、給紙ロ−ラ１の表面はグ
レ−色のみとなり、フォトインタラプタ３からの信号は
、図４に示すように、Ｈｉ だけとなる。この信号の変
化を警報標識または警報音として表示することにより、
給紙ロ−ラ１の交換時期を知ることができる。When the wear of the paper feed roller 1 progresses and the amount of wear exceeds the allowable value dmm, the depth of the portion 2 becomes dmm.
Therefore, the portion 2 and hence its black color disappear from the surface of the paper feed roller 1. Therefore, the surface of the paper feed roller 1 is only gray, and the signal from the photointerrupter 3 is only Hi, as shown in FIG. By displaying this signal change as a warning sign or sound,
It is possible to know when to replace the paper feed roller 1.
【００１５】[0015]
【発明の効果】本発明により、紙搬送ロ−ラ、特に給紙
ロ−ラの寿命を検知することができるので、適時に給紙
ロ−ラの交換を行うことが可能となり、ユ−ザに無駄な
出費や不便を掛ける恐れがなくなった。また、給紙ロ−
ラの摩耗を自動検知するセンサを設けることにより、ユ
−ザでも給紙ロ−ラの寿命を明確に知ることができるの
で、給紙装置の保守がきわめて容易になる。[Effects of the Invention] According to the present invention, it is possible to detect the lifespan of the paper conveyance roller, especially the paper feed roller, so that the paper feed roller can be replaced in a timely manner. There is no longer any need for unnecessary expense or inconvenience. Also, the paper feed roller
By providing a sensor that automatically detects the wear of the paper feed roller, even the user can clearly know the lifespan of the paper feed roller, making maintenance of the paper feed apparatus extremely easy.
【図１】図１は本発明により構成した給紙ロ−ラの斜視
図である。FIG. 1 is a perspective view of a paper feed roller constructed according to the present invention.
【図２】図２は前記給紙ロ−ラの断面図である。FIG. 2 is a sectional view of the paper feed roller.
【図３】図３は給紙ロ−ラの摩耗量が許容範囲内である
ときのセンサよりの信号パタ−ンを示す図である。FIG. 3 is a diagram showing a signal pattern from a sensor when the amount of wear on the paper feed roller is within an allowable range.
【図４】図４は給紙ロ−ラの摩耗量が許容範囲を超えた
ときのセンサよりの信号パタ−ンを示す図である。FIG. 4 is a diagram showing a signal pattern from a sensor when the amount of wear on the paper feed roller exceeds an allowable range.
１ 給紙ロ−ラ
２ 黒部分
３ フォトインタラプタ
４ フォトインタラプタの光軸ｄ
黒部分の深さ ｍｍ1 Paper feed roller 2 Black part 3 Photo interrupter 4 Optical axis d of photo interrupter
Depth of black part mm
Claims (3)
なる色の部分を有し、この部分の深さがほぼ紙搬送ロ−
ラの許容摩耗量になっていることを特徴とする、紙搬送
ロ−ラの寿命検知装置。Claim 1: The surface layer of the paper conveyance roller has a portion whose color is different from the color of this surface layer, and the depth of this portion is approximately the same as that of the paper conveyance roller.
A lifespan detection device for a paper conveyance roller, characterized in that the amount of wear of the roller has reached an allowable amount of wear.
けたことを特徴とする、請求項１に記載の紙搬送ロ−ラ
の寿命検知装置。2. The paper conveyance roller life detection device according to claim 1, further comprising a sensor for detecting the different colored portions.
送ロ−ラの回転方向に非連続的に配置されていることを
特徴とする、請求項１または請求項２に記載の紙搬送ロ
−ラの寿命検知装置。3. The paper according to claim 1 or 2, wherein a plurality of the different colored portions are disposed discontinuously in the rotational direction of the paper conveyance roller. Conveyance roller life detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3015277A JPH04256644A (en) | 1991-02-06 | 1991-02-06 | Lifetime sensing device for sheet transporting roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3015277A JPH04256644A (en) | 1991-02-06 | 1991-02-06 | Lifetime sensing device for sheet transporting roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04256644A true JPH04256644A (en) | 1992-09-11 |
Family
ID=11884370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3015277A Pending JPH04256644A (en) | 1991-02-06 | 1991-02-06 | Lifetime sensing device for sheet transporting roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04256644A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015081187A (en) * | 2013-10-24 | 2015-04-27 | 大日本印刷株式会社 | System for detecting wear of conveyance roller in cut paper printer |
-
1991
- 1991-02-06 JP JP3015277A patent/JPH04256644A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015081187A (en) * | 2013-10-24 | 2015-04-27 | 大日本印刷株式会社 | System for detecting wear of conveyance roller in cut paper printer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6338480B1 (en) | Sheet feeding device for an image forming apparatus | |
| EP1256851B1 (en) | Image forming apparatus capable of determining type of recording sheet to prevent sheet jam | |
| US5573236A (en) | Variable sheet guide position sensor | |
| US5428437A (en) | Roll member wear indicator | |
| US8086123B2 (en) | Image forming apparatus | |
| JPH04256644A (en) | Lifetime sensing device for sheet transporting roller | |
| US7753359B2 (en) | Sheet conveyance apparatus and image forming apparatus | |
| JP2001294342A (en) | Wear detecting device for paper carrying roller | |
| US5532789A (en) | Electrostatic copier having a marking unit for indicating unnecessary print matter on once-used paper | |
| EP0985615B1 (en) | Apparatus and method for measuring a dimension of an object | |
| JP2005208105A (en) | Image forming apparatus and image forming method therefor | |
| EP0867281A1 (en) | Method and device for detecting and controlling the printing pressure in flexographic machines | |
| US20050000375A1 (en) | Stencil printer | |
| JP5077121B2 (en) | Image forming apparatus and state determination method of waste toner collecting container thereof | |
| JP2007296647A (en) | Stencil printing machine | |
| JP7251372B2 (en) | image forming device | |
| US6311613B1 (en) | Stencil printer | |
| JPH0853231A (en) | Printing paper supply device | |
| JP2934539B2 (en) | Image forming apparatus having discharge sheet material pressing device | |
| JPH0592843A (en) | Sheet transport roller replacement timing detecting device for image forming unit | |
| JP2930523B2 (en) | Transfer type printer | |
| JP2000016611A (en) | Image formation device | |
| US20040089175A1 (en) | Control device and method to prevent register errors | |
| KR100346710B1 (en) | Paper thickness sensing method for printer | |
| KR100370210B1 (en) | A sensing apparatus for paper double feeding and paper feeding method using that apparatus for printer |