JPS60178111A - Endless belt - Google Patents
Endless beltInfo
- Publication number
- JPS60178111A JPS60178111A JP2959784A JP2959784A JPS60178111A JP S60178111 A JPS60178111 A JP S60178111A JP 2959784 A JP2959784 A JP 2959784A JP 2959784 A JP2959784 A JP 2959784A JP S60178111 A JPS60178111 A JP S60178111A
- Authority
- JP
- Japan
- Prior art keywords
- zigzag
- travelling
- belt
- mark
- endless belt
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00135—Handling of parts of the apparatus
- G03G2215/00139—Belt
- G03G2215/00143—Meandering prevention
- G03G2215/0016—Meandering prevention by mark detection, e.g. optical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Conveyors (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
Description
【発明の詳細な説明】
[技術分野]
本発明は、蛇行検出用マークを付設した無端ベルトに関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an endless belt provided with meandering detection marks.
[従来技術]
一般に、シート状の物(板材1紙など)を運搬する場合
等、搬送する物を平面上に保持する必要があるとき、搬
送手段として無端状に形成したベルト(以下、無端ベル
トという)を利用した搬送装置を用いることが多い。[Prior Art] In general, when it is necessary to hold the conveyed object on a flat surface, such as when conveying a sheet-like object (such as a sheet of paper), an endless belt (hereinafter referred to as an endless belt) is used as a conveying means. In many cases, a conveyance device using a
このような搬送手段では、物体を載置(支持)する部材
となる無端ベルト自体が平面を構成しているので、物体
を平面で保持することが、比較的簡単にできる。In such a conveyance means, since the endless belt itself, which serves as a member for placing (supporting) the object, forms a flat surface, it is relatively easy to hold the object in a flat surface.
第1図は、いわゆるベルト感光体をセンサとして用いた
静電写真複写機に適用する、ベルト感光体の駆動ユニッ
トを示している。FIG. 1 shows a drive unit for a belt photoreceptor, which is applied to an electrostatographic copying machine using a so-called belt photoreceptor as a sensor.
この駆動ユニツl−では、駆動ローラR1および従動ロ
ー512〜81間にベルト感光体OBを張架し、矢印六
方向にベルト感光体OBを駆動している。In this drive unit 1-, a belt photoreceptor OB is stretched between the drive roller R1 and the driven rows 512 to 81, and the belt photoreceptor OB is driven in six directions of arrows.
この装置は、転写紙をベルト感光体9Bに密着させてペ
ル1〜感光体上に形−成したトナー像を転写紙に転写し
、この後定着部まで転写紙を搬送する。This device brings the transfer paper into close contact with the belt photoreceptor 9B, transfers the toner image formed on the photoreceptor from Pel 1 to the transfer paper, and then conveys the transfer paper to a fixing section.
ところで、周知のようにこのような無端ベルト駆動装置
においては、無端ベルトがその幅方向にずれるいわゆる
蛇行現像を必ず生じる。By the way, as is well known, in such an endless belt drive device, so-called meandering development in which the endless belt shifts in its width direction always occurs.
その主な理由としては、例えば第1図に示した装置にお
いては、ベルト感光体OB(すなわち無端ベルト)の側
@siと52の長さC周長)が異なることおよび各ロー
ラ旧〜R4が完全には平行になっていないことが挙げら
れている。The main reasons for this are that, for example, in the apparatus shown in FIG. It is mentioned that they are not completely parallel.
そこで従来1例えばローラR3に蛇行修正ローラの機能
を持たせて、ベルト感光体OBの蛇行を修正していた。Therefore, conventionally, the meandering of the belt photoreceptor OB has been corrected by providing the roller R3 with the function of a meandering correcting roller.
すなわち、ベルト感光体OBが側端S1方向に蛇行した
ことを検出するフォトセンサPS1と、側端S2方向に
蛇行したことを検出するフォトセンサPS2を設け、セ
ンサPS1がオンした場合はローラR3の軸を矢印B方
向に偏向してベルト感光体OBを矢印り方向に移動させ
、センサPS2がオンした場合はローラR3の軸を矢印
C方向に偏向してベルト感光体OBを矢印E方向に移動
させる。That is, a photosensor PS1 that detects that the belt photoreceptor OB has meandered toward the side edge S1, and a photosensor PS2 that detects that it has meandered toward the side edge S2 are provided. The shaft is deflected in the direction of arrow B to move the belt photoconductor OB in the direction of arrow E. When sensor PS2 is turned on, the shaft of roller R3 is deflected in the direction of arrow C and belt photoconductor OB is moved in the direction of arrow E. let
この制御を逐次くり返すことで、ベルト感光体OBがロ
ーラから外れてしまわないようにしている。By repeating this control one after another, the belt photoreceptor OB is prevented from coming off the roller.
ところで、ベルト感光体OBの側端Sl、S2は、ベル
ト感光体OBの周囲に配設されている各複写プロセスス
テーションや各ローラR1〜R4を支持している支持機
構等に触れることがあり、長い間使用していると側端S
t、S2が部分的にぎざぎざになったり、ささくれにな
ることがある。′
ベルト感光体OBがこのような状態になると、ベルト感
光体OBが蛇行してセンサPsi、PS2がその側端3
1,52を検出するさい、第2図(a) 、 (b)に
示したように、上記したぎざぎざやささくれの部分に対
応したオン信号ONI〜ON4が出力される。By the way, the side edges S1 and S2 of the belt photoreceptor OB may come into contact with each copying process station arranged around the belt photoreceptor OB, the support mechanism supporting each roller R1 to R4, etc. If you use it for a long time, the side edge S
t, S2 may become partially jagged or have hangnails. ' When the belt photoreceptor OB is in such a state, the belt photoreceptor OB meanders and the sensors Psi and PS2 touch their side edges 3.
1 and 52, on-signals ONI to ON4 corresponding to the jagged and hangnail portions described above are output, as shown in FIGS. 2(a) and 2(b).
その結果、従来、上述した蛇行修正制御における蛇行検
出が不確定な動作になるという問題を生じていた。As a result, conventionally, there has been a problem that meandering detection in the above-mentioned meandering correction control becomes an uncertain operation.
特に、ベルト感光体OBの幅方向への移動速度(以下、
寄り速度という)を徐々に小さくするように、i−ラR
3の軸を偏向する蛇行修正制御を行なった場合、寄り速
度が小さくなるにつれて上記した不要なオン信号の出力
期間が長くなるため、蛇行修正がますます困難になる。In particular, the moving speed of the belt photoreceptor OB in the width direction (hereinafter referred to as
i-raR so as to gradually reduce the
When performing meandering correction control that deflects the axis No. 3, as the deviation speed decreases, the output period of the above-mentioned unnecessary ON signal becomes longer, making it increasingly difficult to correct the meandering.
なお、このような不都合は上述した複写機のみならず、
無端ベルト駆動装置を応用した他の装置でも同様に生じ
ている。Note that this inconvenience is not limited to the copiers mentioned above.
Similar problems occur in other devices that utilize endless belt drive devices.
[目的]
本発明は、上述した従来技術の欠点を解消するためにな
されたものであり、蛇行修正制御における蛇行検出を確
実にすることができる無端ベルトを提供することを目的
としている。[Objective] The present invention was made in order to eliminate the drawbacks of the prior art described above, and an object of the present invention is to provide an endless belt that can ensure meandering detection in meandering correction control.
[構成]
以下、添付図面を参照しながら1本発明の実施例を詳細
に説明する。[Configuration] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
第3図は1本発明の一実施例に係るベルト感光体を示す
。FIG. 3 shows a belt photoreceptor according to an embodiment of the present invention.
図示のように、ベルト感光体OBの側端S2と平行し、
その全周にわたってマークMKIが形成されており、マ
ークMKIを検出するフォトセンサ551,552は、
このマークMKIの幅りより若干広い間隔で配設されて
いる。As shown, parallel to the side edge S2 of the belt photoreceptor OB,
A mark MKI is formed over the entire circumference, and photosensors 551 and 552 that detect the mark MKI are
The marks MKI are arranged at intervals slightly wider than the width of the marks MKI.
通常、ベルト感光体OBは鏡面に形成されてその表面は
光をよく反射するため、マーク阿に1は光を反射しない
黒色の塗料を塗布したり、黒色の物質を蒸着したりする
ことで形成される。Normally, the belt photoreceptor OB is formed with a mirror surface and its surface reflects light well, so the mark 1 is formed by applying a black paint that does not reflect light or depositing a black substance. be done.
マークににlの幅りは、ベルト感光体OBの寄り速度の
最大値と、蛇行修正制御の応答時間(応答性)に関係す
る蛇行許容量に対応して設定される。The width of the mark is set in accordance with the maximum value of the shifting speed of the belt photoreceptor OB and the meandering allowable amount related to the response time (responsivity) of the meandering correction control.
また、この幅りとフォトセンサS51.SS2の間隔と
の差が蛇行修正制御の不感*(すなわち精度)に対応し
ている。Also, this width and photo sensor S51. The difference from the interval of SS2 corresponds to the insensitivity* (that is, accuracy) of the meandering correction control.
フォトセンサSSI、SS2の出力信号は図示しない蛇
行修正制御ユニットに加えられる。The output signals of the photosensors SSI and SS2 are applied to a meandering correction control unit (not shown).
ベルト感光体OBが側端S1方向に蛇行するとフオ □
トセンサSS1がマークMKIを検出するためその出力
信号が変化し、また、ベルト感光体OBが側端S2方向
に蛇行するとフォトセンサSS2がマークMKIを検出
するためその出力信号が変化する。When the belt photoreceptor OB meanders toward the side edge S1, the photo
Since the photo sensor SS1 detects the mark MKI, its output signal changes, and when the belt photoreceptor OB meanders toward the side edge S2, the photo sensor SS2 detects the mark MKI, so its output signal changes.
これにより、蛇行修正制御ユニットはベルト感光体OB
の蛇行状態を判別することができる。As a result, the meandering correction control unit controls the belt photoreceptor OB.
It is possible to determine the meandering state of the
ところで、蛇行修正制御でベルト感光体の駆動状況(速
度等)を知る必要がある場合、例えば、ベルト感光体O
Bの寄り速度を徐々に小さくするような制御を実行する
場合、複写プロセスを制御するための基準クロックパル
スを蛇行修正制御ユニットに供給している。By the way, when it is necessary to know the driving status (speed, etc.) of the belt photoreceptor in meandering correction control, for example, if the belt photoreceptor O
When performing control to gradually reduce the deviation speed of B, a reference clock pulse for controlling the copying process is supplied to the meandering correction control unit.
この基準クロックパルスは、ベルト感光体を駆動するメ
インモータに付設したパルスエンコーダから出力される
ため、蛇行修正制御ユニットを本体制御ユニットと別体
に構成した場合は特別な配線を必要とする。また、ベル
ト感光体がすべっている場合は、基準クロックパルスの
数とベルト感光体の移動とが対応しないという不都合を
生じる。Since this reference clock pulse is output from a pulse encoder attached to the main motor that drives the belt photoreceptor, special wiring is required if the meandering correction control unit is configured separately from the main control unit. Further, if the belt photoreceptor is slipping, there is a problem that the number of reference clock pulses does not correspond to the movement of the belt photoreceptor.
このような不都合を解消した実施例を、次に説明する。An embodiment that eliminates such inconvenience will be described below.
第5図は、本発明の他の実施例に係るベルト感光体を示
している。FIG. 5 shows a belt photoreceptor according to another embodiment of the invention.
この実施例では、濃度が大きい片材M1と濃度が小さい
片材M2を交互に並べて形成したマーク阿に2を、ベル
ト感光体OBの側端SB2と平行した全周にわたって付
設している。In this embodiment, marks 2 are attached to marks A formed by alternately arranging strips M1 with a high density and strips M2 with a low density over the entire circumference parallel to the side edge SB2 of the belt photoreceptor OB.
また、フォトセンサ551,552は、ベルト感光体O
Bが蛇行していない状態では第6図に示したようにとも
にマークMK2を検出する位置に配設されている。Further, the photosensors 551 and 552 are connected to the belt photoreceptor O.
In the state where B is not meandering, both are arranged at positions where the mark MK2 is detected, as shown in FIG.
フォトセンサSSI、SS2の出力信号は、第7図に一
例を示した信号処理部で波形整形されたのち、次段の蛇
行修正制御ユニットへ出力される。The output signals of the photosensors SSI and SS2 are waveform-shaped by a signal processing section, an example of which is shown in FIG. 7, and then output to the meandering correction control unit at the next stage.
フォトセンサSS1の出力信号は基準電圧Vr+が設定
されている比較器CMPIおよび基準電圧Vr2が設定
されている比較器CMP2に加えられ、フォトセンサ5
52の出力信号は基準電圧Vr+が設定されている比較
器CMP3および基準電圧Vr2が設定されている比較
器CMP4に加えられる。The output signal of the photosensor SS1 is applied to a comparator CMPI to which a reference voltage Vr+ is set and a comparator CMP2 to which a reference voltage Vr2 is set.
The output signal of 52 is applied to a comparator CMP3 set to a reference voltage Vr+ and a comparator CMP4 set to a reference voltage Vr2.
第8図(a)に示したように、基準電圧vr1は1片材
M1を検出したときのフォトセンサSSI、S52の出
力信号Sm1より大きく、かつ、片材阿2を検出したと
きのフォトセンサ551.SS2の出力信号Sm2より
小さい値に設定され、基準電圧vr2は、フォトセンサ
S51 、 S52の出力信号Sm2より大きく、かつ
、ベルト感光体OBを検出したときのフォトセンサ53
1.552の出力信号sbより小さい値に設定される。As shown in FIG. 8(a), the reference voltage vr1 is larger than the output signal Sm1 of the photosensors SSI and S52 when one piece of material M1 is detected, and the photosensor when detecting one piece of material A2 551. The reference voltage vr2 is set to a value smaller than the output signal Sm2 of SS2, and the reference voltage vr2 is larger than the output signal Sm2 of the photosensors S51 and S52, and the photosensor 53 when detecting the belt photoreceptor OB.
It is set to a value smaller than the output signal sb of 1.552.
したがって、フォトセンサS51,552が片材旧を検
出しているとき比較器C肝1.CMP3からオン信号S
01,5D3(第8図(b)参照)が出力され、フォト
センサ551.SS2が片材M1かM2すなわちマーク
MK2を検出しているときは比較器CMP2.CMI’
4からオン信号SD2゜SO2(第8図(c)参照)が
出力される。Therefore, when the photosensors S51 and S552 are detecting the old piece of material, the comparator C liver 1. On signal S from CMP3
01,5D3 (see FIG. 8(b)) is output, and the photosensor 551. When SS2 detects either piece M1 or M2, that is, mark MK2, comparator CMP2. CMI'
4 outputs an on signal SD2°SO2 (see FIG. 8(c)).
さて、ベルト感光体OBが駆動されると、フォトセンサ
551,552が片材旧を検出するたびにオン信号S0
1.SO2が出力され、また、フォトセンサSS1がマ
ークにに2を検出している状態であればオン信号SD2
が出力され、フォトセンサSS2がマークMK2を検出
している状態であればオン信号SD4が出力される。Now, when the belt photoreceptor OB is driven, each time the photosensors 551 and 552 detect the old piece, an ON signal S0 is generated.
1. If SO2 is output and the photosensor SS1 detects mark 2, the on signal SD2 is output.
is output, and if the photosensor SS2 is detecting the mark MK2, an on signal SD4 is output.
すなわち、蛇行修正制御ユニットはオン信号501、S
O2からベルト感光体OBの駆動状態を判別でき、また
、オン信号SD2.SD4からベルト感光体OBの蛇行
状態を判別することができる。That is, the meandering correction control unit outputs the ON signal 501, S
The driving state of the belt photoreceptor OB can be determined from O2, and the ON signal SD2. The meandering state of the belt photoreceptor OB can be determined from SD4.
したがって、この実施例によれば、蛇行修正制御ユニッ
トにパルスエンコーダからの基準クロックパルスを加え
なくてよくなり、そのための配線を要さずに済む。Therefore, according to this embodiment, it is not necessary to apply the reference clock pulse from the pulse encoder to the meandering correction control unit, and there is no need for wiring for this purpose.
[効果]
以上説明したように、本発明によれば蛇行修正制御にお
ける蛇行検出を確実に行なえるという利点を有する。[Effects] As described above, the present invention has the advantage that meandering can be reliably detected in meandering correction control.
第1図は無端ベルトの従来例を示した斜視図。
第2図(a)、(b)は蛇行検出信号の一例を示した波
形図、第3図は本発明の一実施例を示した斜視図、第4
図はマークの一例を示した概略図、第5図は本発明の他
の実施例を示した斜視図、第6図はマークの他の例を示
した概略図、第7図は信号処理部の一例を示したブロッ
ク図、第8図(a)は基準電圧のレベル設定例を示した
波形図、第8図(b) 、 (c)は信号処理部の出力
波形図である。
MKI、MK2・・・マーク、旧、M2・・・片材、S
51,552・・・フォトセンサ、CM門、CHF2.
CHF2.CHF2・・・比較器。
第7図
Hl
第2図
第3図
第5図
1
第7図
第8図FIG. 1 is a perspective view showing a conventional example of an endless belt. 2(a) and 2(b) are waveform diagrams showing an example of a meandering detection signal, FIG. 3 is a perspective view showing an embodiment of the present invention, and FIG.
The figure is a schematic diagram showing an example of the mark, FIG. 5 is a perspective view showing another embodiment of the present invention, FIG. 6 is a schematic diagram showing another example of the mark, and FIG. 7 is a signal processing section. FIG. 8(a) is a waveform diagram showing an example of level setting of the reference voltage, and FIGS. 8(b) and 8(c) are output waveform diagrams of the signal processing section. MKI, MK2...mark, old, M2...piece, S
51,552...Photo sensor, CM gate, CHF2.
CHF2. CHF2... Comparator. Figure 7 Hl Figure 2 Figure 3 Figure 5 Figure 1 Figure 7 Figure 8
Claims (1)
ローラ間に張架支持さ九で駆動さtLる無端ベルトにお
いて、側端と平行な全周にわたって蛇行許容量に対応し
た幅の蛇行検出用マークを付設したことを特徴とする無
端ベルト。On an endless belt that is stretched between multiple rollers, at least one of which acts as a meandering correction roller, and is driven by a motor, a meandering detection mark with a width corresponding to the meandering allowance is attached along the entire circumference parallel to the side edge. An endless belt characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2959784A JPS60178111A (en) | 1984-02-21 | 1984-02-21 | Endless belt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2959784A JPS60178111A (en) | 1984-02-21 | 1984-02-21 | Endless belt |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60178111A true JPS60178111A (en) | 1985-09-12 |
Family
ID=12280481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2959784A Pending JPS60178111A (en) | 1984-02-21 | 1984-02-21 | Endless belt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60178111A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5096044A (en) * | 1989-10-05 | 1992-03-17 | Carl Schenck Ag | Method and apparatus for monitoring the run of a belt |
US5157444A (en) * | 1990-01-11 | 1992-10-20 | Canon Kabushiki Kaisha | Apparatus for controlling the lateral shifting of an endless belt by detecting belt position |
US5248027A (en) * | 1992-12-18 | 1993-09-28 | Xerox Corporation | Method and apparatus for belt steering control |
WO1999000710A1 (en) * | 1997-06-30 | 1999-01-07 | Imation Corp. | System for registration of color separation images on a photoconductor belt |
US5896158A (en) * | 1997-06-30 | 1999-04-20 | Imation Corp. | System for registration of a photoconductor belt in an electrophotographic imaging system |
US5978003A (en) * | 1997-06-30 | 1999-11-02 | Imation Corp. | Belt position detection system for belt registration in an electrophotographic imaging system |
JP2007331864A (en) * | 2006-06-13 | 2007-12-27 | Toyota Motor Corp | Transfer device for article to be conveyed |
-
1984
- 1984-02-21 JP JP2959784A patent/JPS60178111A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5096044A (en) * | 1989-10-05 | 1992-03-17 | Carl Schenck Ag | Method and apparatus for monitoring the run of a belt |
US5157444A (en) * | 1990-01-11 | 1992-10-20 | Canon Kabushiki Kaisha | Apparatus for controlling the lateral shifting of an endless belt by detecting belt position |
US5248027A (en) * | 1992-12-18 | 1993-09-28 | Xerox Corporation | Method and apparatus for belt steering control |
WO1999000710A1 (en) * | 1997-06-30 | 1999-01-07 | Imation Corp. | System for registration of color separation images on a photoconductor belt |
US5896158A (en) * | 1997-06-30 | 1999-04-20 | Imation Corp. | System for registration of a photoconductor belt in an electrophotographic imaging system |
US5905519A (en) * | 1997-06-30 | 1999-05-18 | Imation Corp. | System for registration of color separation images on a photoconductor belt |
US5978003A (en) * | 1997-06-30 | 1999-11-02 | Imation Corp. | Belt position detection system for belt registration in an electrophotographic imaging system |
JP2007331864A (en) * | 2006-06-13 | 2007-12-27 | Toyota Motor Corp | Transfer device for article to be conveyed |
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