JP2007140414A - Motor drive control apparatus and image forming apparatus - Google Patents

Motor drive control apparatus and image forming apparatus Download PDF

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JP2007140414A
JP2007140414A JP2005337833A JP2005337833A JP2007140414A JP 2007140414 A JP2007140414 A JP 2007140414A JP 2005337833 A JP2005337833 A JP 2005337833A JP 2005337833 A JP2005337833 A JP 2005337833A JP 2007140414 A JP2007140414 A JP 2007140414A
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encoder
motor
transmission type
type sensor
rotating body
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JP4804892B2 (en
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Kouji Kiryu
光示 桐生
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Ricoh Co Ltd
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Ricoh Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide a motor drive control apparatus capable of easily ejecting a rotor from the body. <P>SOLUTION: In the motor drive control apparatus provided with an encoder 7 fixed to a driving shaft 6 of the rotor (photoreceptor 2) to be rotated by a motor 3 and a translucent sensor for detecting a slit of the encoder 7 and is allowed to control the drive of the motor 3 so as to reduce the cycle variation of the rotor on the basis of an output from the translucent sensor; a light projection part 11 and a light receiving part 12 in the translucent sensor are arranged separately and independently through the encoder 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、モータによって回転する回転体の駆動軸に取り付けられたエンコーダと、エンコーダの検出部を検出するセンサとを備え、センサの出力に基いて回転体周期変動を低減するようにモータを駆動制御するモータ駆動制御装置に関する。   The present invention includes an encoder attached to a drive shaft of a rotating body that is rotated by a motor, and a sensor that detects a detection unit of the encoder, and drives the motor so as to reduce the period variation of the rotating body based on the output of the sensor. The present invention relates to a motor drive control device to be controlled.

モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、エンコーダに形成されたスリットを検出する透過型センサとを備え、透過型センサの出力に基いて回転体周期変動を低減するようにモータを駆動制御するモータ駆動制御装置は各種機器に広く利用されている。
例えば、複写機、プリンタのような画像形成装置においては、ステッピングモータによって感光体が回転駆動される。感光体の軸にはエンコーダが取り付けられ、エンコーダと対向して透過型センサが配置される。
図８は画像形成装置の要部斜視図である。各プロセスカートリッジ１内には感光体２が配設されている。モータ３を駆動すると、モータ駆動ギヤ４、感光体側従動ギヤ５、感光体２の駆動軸６を介して各プロセスカートリッジ１内の感光体２が駆動される。周方向に所定のピッチにてスリットＳを備えた円板であるエンコーダ７は、感光体１の駆動軸６上に同軸状に連結されており、図９、図１０に示す透過型センサにより速度変動データを検出する構成となっている。符号８は中間転写ベルトである。
図９は回転体を感光体とした従来例のモータ駆動制御装置の斜視図、図１０は同、構成図である。図９、図１０に示すように、エンコーダ７のスリットを検出する透過型センサ９が搭載されている。透過型センサ９（フォトインタラプタ）は図１０に示すように、凹型形状をしており、その凹部にエンコーダが入り込んでいる。 An encoder attached to the shaft of a rotating body that is rotationally driven by a motor, and a transmission type sensor that detects a slit formed in the encoder, so as to reduce the period variation of the rotating body based on the output of the transmission type sensor Motor drive control devices that drive and control motors are widely used in various devices.
For example, in an image forming apparatus such as a copying machine or a printer, a photosensitive member is rotationally driven by a stepping motor. An encoder is attached to the shaft of the photosensitive member, and a transmission type sensor is disposed opposite the encoder.
FIG. 8 is a perspective view of a main part of the image forming apparatus. A photoconductor 2 is disposed in each process cartridge 1. When the motor 3 is driven, the photoreceptor 2 in each process cartridge 1 is driven via the motor drive gear 4, the photoreceptor-side driven gear 5, and the drive shaft 6 of the photoreceptor 2. An encoder 7, which is a disc having slits S at a predetermined pitch in the circumferential direction, is coaxially connected to the drive shaft 6 of the photosensitive member 1, and is speeded by a transmission type sensor shown in FIGS. 9 and 10. It is configured to detect fluctuation data. Reference numeral 8 denotes an intermediate transfer belt.
FIG. 9 is a perspective view of a conventional motor drive control device using a rotating member as a photosensitive member, and FIG. 10 is a block diagram of the same. As shown in FIGS. 9 and 10, a transmissive sensor 9 for detecting the slit of the encoder 7 is mounted. As shown in FIG. 10, the transmissive sensor 9 (photo interrupter) has a concave shape, and an encoder enters the concave portion.

上記の画像形成装置において、感光体が寿命や故障で交換される場合、通常は装置前面から感光体を引き抜いて交換する作業が行われるが、このとき感光体の軸に取り付けられたエンコーダと本体側に固定されている透過型センサが干渉してしまい、サービスマンもしくはユーザーの作業性が悪くなるという問題があった。反射型センサを用いればこの問題は解決できるが、エンコーダの検出面以外での反射光も受光してしまい、検出精度が低下するという問題がある。
本発明は、透過型センサを使用した場合は、回転体を本体から容易に引き抜くことができ、反射型センサを使用した場合は、検出精度を向上させることができるモータ駆動制御装置を提供することを目的とする。 In the image forming apparatus described above, when the photoconductor is replaced due to its life or failure, the work is usually performed by pulling out the photoconductor from the front of the apparatus and replacing it. At this time, the encoder and the main body attached to the shaft of the photoconductor There is a problem that the transmissive sensor fixed on the side interferes and the workability of the service person or the user is deteriorated. Although this problem can be solved by using a reflective sensor, there is a problem in that the reflected light from other than the detection surface of the encoder is also received and the detection accuracy is lowered.
The present invention provides a motor drive control device that can easily pull out a rotating body from a main body when a transmission type sensor is used, and can improve detection accuracy when a reflection type sensor is used. With the goal.

上記目的を達成するために、請求項１記載の発明は、モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記透過型センサの投光部と受光部が、前記エンコーダを挟んで分離独立して配設され、且つ前記回転体を抜き取り方向へ軸方向移動させる過程において前記投光部又は受光部と前記透過型センサとが干渉しないように構成されていることを特徴とする。
請求項２の発明は、モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記透過型センサは、投光部と受光部とを対向配置した一体型であり、前記投光部または受光部は前記エンコーダの軸方向への抜き取り時にエンコーダ外周縁部と干渉しない位置関係にて配設されていることを特徴とする。
請求項３の発明は、モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記エンコーダは、円板状本体の外周縁を軸方向外側へ直角に屈曲させると共にその外周面にスリットを備えた開口筒状部を有し、前記透過型センサは、投光部と受光部とを対向配置した一体型であり、前記開口筒状部の先端を間に挟んで前記投光部と受光部とを対向配置することにより、前記エンコーダの軸方向への抜き取り時にエンコーダ外周縁部と干渉しないように構成したことを特徴とする。
請求項４の発明は、モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記エンコーダの軸方向外側に傾斜状検出部を突出形成し、反射型センサを傾斜状検出部に対向する位置に配設したことを特徴とする。
請求項５の発明は、モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記エンコーダに凹状検出部を設け、該凹状検出部の凹状被検出面に前記反射型センサを対向配置したことを特徴とする。
請求項６の発明に係る画像形成装置は、請求項１乃至５のいずれか一項に記載のモータ駆動制御装置を搭載したことを特徴とする。 In order to achieve the above object, the invention described in claim 1 includes an encoder attached to a shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and the transmission type. And a motor drive control device that controls the drive of the motor so as to reduce the periodic fluctuation of the rotating body based on the output from the sensor, wherein the light projecting unit and the light receiving unit of the transmissive sensor are The light emitting unit or the light receiving unit and the transmission type sensor are arranged so as not to interfere with each other in the process of moving the rotating body in the axial direction in the extraction direction. Features.
According to a second aspect of the present invention, there is provided an encoder attached to a shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a rotating body based on an output from the transmission type sensor. And a control means for controlling the drive of the motor so as to reduce the periodic fluctuation of the transmission sensor, wherein the transmission type sensor is an integrated type in which a light projecting part and a light receiving part are arranged to face each other, The light projecting unit or the light receiving unit is arranged in a positional relationship that does not interfere with the outer peripheral edge of the encoder when the encoder is extracted in the axial direction.
According to a third aspect of the present invention, there is provided an encoder attached to a shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a rotating body based on an output from the transmission type sensor. And a control means for controlling the drive of the motor so as to reduce the periodic fluctuation of the encoder, wherein the encoder bends the outer peripheral edge of the disk-shaped body perpendicularly outward in the axial direction and The transmissive sensor is an integrated type in which a light projecting unit and a light receiving unit are arranged to face each other, and the projection is disposed with a tip of the cylindrical tube portion interposed therebetween. The optical part and the light receiving part are arranged so as to face each other so that they do not interfere with the outer peripheral edge of the encoder when the encoder is extracted in the axial direction.
According to a fourth aspect of the present invention, there is provided an encoder attached to a shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a rotating body based on an output from the transmission type sensor. And a control means for controlling the drive of the motor so as to reduce the periodic fluctuation of the encoder. It arrange | positions in the position facing a part.
According to a fifth aspect of the present invention, there is provided an encoder attached to a shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a rotating body based on an output from the transmission type sensor. And a control means for controlling the drive of the motor so as to reduce the periodic fluctuation of the encoder, wherein the encoder is provided with a concave detector, and the reflective sensor is provided on the concave detection surface of the concave detector Are arranged opposite to each other.
An image forming apparatus according to a sixth aspect of the present invention includes the motor drive control device according to any one of the first to fifth aspects.

本発明は、モータによって回転する回転体の駆動軸に取り付けられたエンコーダと、エンコーダのスリットを検出する透過型センサとを備え、透過型センサの出力に基いて回転体周期変動を低減するようにモータを駆動制御するモータ駆動制御装置において、透過型センサの投光部と受光部が、エンコーダを挟んで分離独立して配設されているので、回転体を本体側の軸から容易に軸方向へ引き抜くことができる。   The present invention includes an encoder attached to a drive shaft of a rotating body that is rotated by a motor, and a transmission type sensor that detects a slit of the encoder, so as to reduce rotation body cycle variation based on the output of the transmission type sensor. In the motor drive control device for driving and controlling the motor, the light projecting part and the light receiving part of the transmission type sensor are arranged separately and sandwiched with the encoder interposed therebetween. Can be pulled out.

以下、本発明の実施形態を図面に従って説明する。なお、従来例と同一個所には同一符号を付して、重複する説明は省略する。
図１は本発明の第１の実施形態に係るモータ駆動制御装置の構成を示す断面図である。回転体としての感光体ドラム２は両端面の中心部から軸２ａ、２ｂを突出しており、各軸２ａ、２ｂは図示しない軸受によって回転自在に軸支されている。一方の軸２ａには周方向に所定のピッチにてスリットを貫通形成した円板であるエンコーダ７の軸心が固定されている。エンコーダ７の中心部外側面（或いは軸２ａの端部）には軸２ａと同軸状に駆動軸６が固定されており、図示しないモータからの駆動力を軸２ａを介して感光体ドラム２に伝達するように構成されている。
感光体ドラム２はプロセスカートリッジ１のケース１ａ内に回転自在に支持されている。ケース１ａの外側と装置本体５との間には透過型センサ１０が配置されている。透過型センサＡの投光部１１はケース１ａの壁面外面に固定されており、受光部１２は従来と同様、装置本体側に設置されている。エンコーダ７は投光部１１と受光部１２の間に配置される。
本発明は、モータによって回転する感光体ドラム２の駆動軸６に取り付けられたエンコーダ７と、エンコーダ７のスリットを検出する透過型センサ１０と、透過型センサ１０の出力に基いて回転体周期変動を低減するようにモータを駆動制御する制御手段と、を備えたモータ駆動制御装置において、透過型センサの投光部１１と受光部１２が、エンコーダ７を挟んで分離独立して配設されている構成が特徴的である。
プロセスカートリッジ１側には、投光部１１とエンコーダ７が組み込まれているため、 プロセスカートリッジ１はケース１ａ、投光部１１、及びエンコーダ１１と共に、装置本体から図面左方向へ独立して取り外し可能である。この際、エンコーダ７と受光部１２とが干渉しないため、プロセスカートリッジ１の交換時にサービスマンもしくはユーザーの作業性が向上する。またエンコーダ７と透過型センサ１０とが干渉しないため、両者の破壊、故障を回避することができる。なお、投光部１１の電源は、プロセスカートリッジ１内部に設けた電池から供給することや、プロセスカートリッジ１にコネクタを取り付け、本体側から供給することが考えられる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same location as a prior art example, and the overlapping description is abbreviate | omitted.
FIG. 1 is a cross-sectional view showing the configuration of the motor drive control device according to the first embodiment of the present invention. The photosensitive drum 2 as a rotating body projects shafts 2a and 2b from the center of both end faces, and the shafts 2a and 2b are rotatably supported by bearings (not shown). One shaft 2a is fixed with an axial center of an encoder 7 which is a disc having slits formed in a circumferential direction with a predetermined pitch. A drive shaft 6 is fixed coaxially with the shaft 2a on the outer surface of the center of the encoder 7 (or the end of the shaft 2a), and a driving force from a motor (not shown) is applied to the photosensitive drum 2 via the shaft 2a. Configured to communicate.
The photosensitive drum 2 is rotatably supported in the case 1a of the process cartridge 1. A transmissive sensor 10 is disposed between the outside of the case 1 a and the apparatus main body 5. The light projecting unit 11 of the transmissive sensor A is fixed to the outer surface of the wall surface of the case 1a, and the light receiving unit 12 is installed on the apparatus main body side as in the prior art. The encoder 7 is disposed between the light projecting unit 11 and the light receiving unit 12.
The present invention relates to an encoder 7 attached to a drive shaft 6 of a photosensitive drum 2 that is rotated by a motor, a transmission type sensor 10 that detects a slit of the encoder 7, and a rotating body cycle variation based on the output of the transmission type sensor 10. And a control means for controlling the drive of the motor so as to reduce the noise, the light projecting section 11 and the light receiving section 12 of the transmission type sensor are disposed separately and independently with the encoder 7 interposed therebetween. The configuration is characteristic.
Since the light projecting unit 11 and the encoder 7 are incorporated on the process cartridge 1 side, the process cartridge 1 can be detached from the apparatus main body independently from the apparatus main body together with the case 1a, the light projecting unit 11, and the encoder 11. It is. At this time, since the encoder 7 and the light receiving unit 12 do not interfere with each other, the serviceability of the service person or the user is improved when the process cartridge 1 is replaced. In addition, since the encoder 7 and the transmission sensor 10 do not interfere with each other, the destruction and failure of both can be avoided. Note that the power of the light projecting unit 11 may be supplied from a battery provided inside the process cartridge 1 or may be supplied from the main body side with a connector attached to the process cartridge 1.

図２は本発明の第２の実施形態に係るモータ駆動制御装置の構成図である。透過型センサ９は従来と同様に、投光部と受光部が一体となっている凹形状のセンサ（フォトインタラプタ）だが、エンコーダ７の端縁に対して斜めに取り付けられている。つまり、エンコーダ７の端縁を凹部によって挟み込むのではなく、エンコーダ７を左方向へ抜き取る際にセンサ９に干渉しないように配置している。つまり、プロセスカートリッジ１（感光体２）の抜き取り方向（図の左側）に向って上向きで、凹部内壁に対向配置されている投光部と受光部のうちの何れか一方がエンコーダの外周端縁よりも外側となるように透過型センサ９を傾斜させて取り付ける。
このような配置により、エンコーダ７と透過型センサ９が干渉しなくなり、感光体２の引き抜き時（交換時）、サービスマンもしくはユーザーの作業性の向上を図ることができ、またエンコーダ７と透過型センサ９の干渉、衝突による両者の破壊、故障を防止することができる。
図３は本発明の第３の実施形態に係るモータ駆動制御装置の構成図である。エンコーダ７は、円板状ではなく外周縁が直角に折れ曲がったシャーレ状の形状をしている。つまり、エンコーダ７の円板状の本体の外周縁を外形方向外側に筒状に突出させることにより形成した開口筒状部７−１先端が感光体２側に開口している透過型センサ９の凹部（投光部と受光部との間）に入り込んでいる。このため、エンコーダ７を左方向へ抜き取る際にセンサ９との干渉がなくなる。
図４は図３に示すエンコーダの拡大斜視図である。エンコーダ７の開口筒状部７−１の外周面にはスリット（被検出開口部）１３が配設されている。それによって、透過型センサ９は感光体２側が開口するように設置できるため、透過型センサ９を取り外すことなくプロセスカートリッジ１を着脱させることが可能となる。 FIG. 2 is a configuration diagram of a motor drive control device according to the second embodiment of the present invention. The transmissive sensor 9 is a concave sensor (photo interrupter) in which the light projecting portion and the light receiving portion are integrated as in the conventional case, but is attached obliquely to the edge of the encoder 7. That is, the end edge of the encoder 7 is not sandwiched between the recesses, but is arranged so as not to interfere with the sensor 9 when the encoder 7 is pulled leftward. That is, one of the light projecting portion and the light receiving portion that faces upward in the extraction direction (left side of the drawing) of the process cartridge 1 (photosensitive member 2) and faces the inner wall of the concave portion is the outer peripheral edge of the encoder. The transmissive sensor 9 is attached to be inclined so as to be on the outer side.
With such an arrangement, the encoder 7 and the transmissive sensor 9 do not interfere with each other, and the workability of the service person or the user can be improved when the photosensitive member 2 is pulled out (replacement). Both destruction and failure due to interference and collision of the sensor 9 can be prevented.
FIG. 3 is a configuration diagram of a motor drive control device according to the third embodiment of the present invention. The encoder 7 is not a disc shape, but has a petri dish shape whose outer peripheral edge is bent at a right angle. In other words, the transmissive sensor 9 has a distal end of the open cylindrical portion 7-1 formed by projecting the outer peripheral edge of the disk-shaped main body of the encoder 7 outwardly in the outer shape direction and opening to the photosensitive member 2 side. It enters the recess (between the light projecting part and the light receiving part). For this reason, there is no interference with the sensor 9 when the encoder 7 is extracted leftward.
FIG. 4 is an enlarged perspective view of the encoder shown in FIG. A slit (detected opening) 13 is disposed on the outer peripheral surface of the opening cylindrical portion 7-1 of the encoder 7. Accordingly, since the transmissive sensor 9 can be installed so that the photosensitive member 2 side is opened, the process cartridge 1 can be attached and detached without removing the transmissive sensor 9.

図５は本発明の第４の実施形態に係るモータ駆動制御装置の構成図である。反射型センサ２１はエンコーダ７を左方へ軸方向移動させて抜き取る際にその移動経路に干渉しない外側位置に配置する。また、エンコーダ７は軸方向外側に斜めに突出形成した傾斜状検出部７−２を有し、傾斜状検出部７−２が反射型センサ２と対向するように両者を配置する。
これにより、エンコーダ７の非検出部やプロセスカートリッジ１の外面と反射型センサ２１は非対向となるため、反射型センサ２１は非検出部およびプロセスカートリッジ１の外面によって反射される光を受光しなくなり、検出精度を向上させることができる。
図６は本発明の第５の実施形態に係るモータ駆動制御装置の構成図である。凹状検出部７−３を持つエンコーダ７を使用する。反射型センサ２１はエンコーダ７の外側面に対向する位置に配設する。
図７は図６の要部の拡大図である。反射型センサ２１の投光部２１−１より放射される光はエンコーダ７の凹状検出部（凹状被検出面）７−３を介して、受光部２１−２へと伝わる。この時、検出面が凹面となっているため、投光部２１−１からの放射光が凹面で反射し、受光部２１−２への集光性が向上する。これにより、凹状検出部７−３が反射型センサ２１と対向した場合と、非対向の場合でのセンサ出力の差が大きくなり、センサの検出精度が向上することとなる。 FIG. 5 is a configuration diagram of a motor drive control device according to the fourth embodiment of the present invention. The reflective sensor 21 is arranged at an outer position that does not interfere with the movement path when the encoder 7 is moved leftward in the axial direction and extracted. The encoder 7 has an inclined detection portion 7-2 that is formed so as to protrude obliquely outward in the axial direction, and both are arranged so that the inclined detection portion 7-2 faces the reflective sensor 2.
As a result, the non-detection part of the encoder 7 and the outer surface of the process cartridge 1 are not opposed to the reflective sensor 21, so that the reflective sensor 21 does not receive light reflected by the non-detection part and the outer surface of the process cartridge 1. , Detection accuracy can be improved.
FIG. 6 is a configuration diagram of a motor drive control device according to the fifth embodiment of the present invention. An encoder 7 having a concave detector 7-3 is used. The reflective sensor 21 is disposed at a position facing the outer surface of the encoder 7.
FIG. 7 is an enlarged view of a main part of FIG. The light emitted from the light projecting unit 21-1 of the reflective sensor 21 is transmitted to the light receiving unit 21-2 through the concave detection unit (concave detection target surface) 7-3 of the encoder 7. At this time, since the detection surface is a concave surface, the emitted light from the light projecting unit 21-1 is reflected by the concave surface, and the light condensing property to the light receiving unit 21-2 is improved. As a result, the difference in sensor output between when the concave detector 7-3 faces the reflective sensor 21 and when it does not face the sensor increases, and the detection accuracy of the sensor is improved.

本発明の第１の実施形態に係るモータ駆動制御装置の構成図である。1 is a configuration diagram of a motor drive control device according to a first embodiment of the present invention. 本発明の第２の実施形態に係るモータ駆動制御装置の構成図である。It is a block diagram of the motor drive control apparatus which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施形態に係るモータ駆動制御装置の構成図である。It is a block diagram of the motor drive control apparatus which concerns on the 3rd Embodiment of this invention. 図３に示すエンコーダの拡大斜視図である。FIG. 4 is an enlarged perspective view of the encoder shown in FIG. 3. 本発明の第４の実施形態に係るモータ駆動制御装置の構成図である。It is a block diagram of the motor drive control apparatus which concerns on the 4th Embodiment of this invention. 本発明の第５の実施形態に係るモータ駆動制御装置の構成図である。It is a block diagram of the motor drive control apparatus which concerns on the 5th Embodiment of this invention. 図６の要部の拡大図である。It is an enlarged view of the principal part of FIG. 画像形成装置の要部斜視図である。1 is a perspective view of a main part of an image forming apparatus. 回転体を感光体とした従来例のモータ駆動制御装置の斜視図である。It is a perspective view of the conventional motor drive control apparatus which used the rotating body as the photoconductor. 回転体を感光体とした従来例のモータ駆動制御装置の構成図である。It is a block diagram of the motor drive control apparatus of the prior art example which used the rotary body as the photoreceptor.

符号の説明Explanation of symbols

２ 感光体
３ モータ
６ 駆動軸
７ エンコーダ
９ 透過型センサ
１１ 投光部
１２ 受光部 2 Photosensitive member 3 Motor 6 Drive shaft 7 Encoder 9 Transmission type sensor 11 Light projecting unit 12 Light receiving unit

Claims (6)

モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、前記透過型センサの投光部と受光部が、前記エンコーダを挟んで分離独立して配設され、且つ前記回転体を抜き取り方向へ軸方向移動させる過程において前記投光部又は受光部と前記透過型センサとが干渉しないように構成されていることを特徴とするモータ駆動制御装置。   An encoder attached to a shaft of a rotating body that is driven to rotate by a motor, a transmission type sensor that detects a slit provided in the encoder, and a periodic variation of the rotating body based on an output from the transmission type sensor A control means for controlling the driving of the motor, wherein the light projecting portion and the light receiving portion of the transmission type sensor are separately provided with the encoder interposed therebetween, and the rotating body A motor drive control device, wherein the light projecting unit or the light receiving unit and the transmissive sensor do not interfere with each other in the process of axially moving the lens in the extraction direction. モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、
前記透過型センサは、投光部と受光部とを対向配置した一体型であり、前記投光部または受光部は前記エンコーダの軸方向への抜き取り時にエンコーダ外周縁部と干渉しない位置関係にて配設されていることを特徴とするモータ駆動制御装置。 An encoder attached to the shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a periodic variation of the rotating body based on an output from the transmission type sensor A motor drive control device comprising: a control means for controlling the drive of the motor;
The transmission type sensor is an integrated type in which a light projecting unit and a light receiving unit are arranged to face each other, and the light projecting unit or the light receiving unit is positioned so as not to interfere with the outer peripheral edge of the encoder when the encoder is extracted in the axial direction. A motor drive control device characterized by being arranged. モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、
前記エンコーダは、円板状本体の外周縁を軸方向外側へ直角に屈曲させると共にその外周面にスリットを備えた開口筒状部を有し、
前記透過型センサは、投光部と受光部とを対向配置した一体型であり、前記開口筒状部の先端を間に挟んで前記投光部と受光部とを対向配置することにより、前記エンコーダの軸方向への抜き取り時にエンコーダ外周縁部と干渉しないように構成したことを特徴とするモータ駆動制御装置。 An encoder attached to a shaft of a rotating body that is driven to rotate by a motor, a transmission type sensor that detects a slit provided in the encoder, and a periodic variation of the rotating body based on an output from the transmission type sensor A motor drive control device comprising: a control means for controlling the drive of the motor;
The encoder has an open cylindrical portion that is bent at a right angle outward in the axial direction at the outer peripheral edge of the disc-shaped main body and provided with a slit on the outer peripheral surface thereof.
The transmission type sensor is an integral type in which a light projecting unit and a light receiving unit are arranged to face each other, and the light projecting unit and the light receiving unit are arranged to face each other with the tip of the opening cylindrical part interposed therebetween, A motor drive control device configured so as not to interfere with the outer peripheral edge of the encoder when the encoder is pulled out in the axial direction. モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、
前記エンコーダの軸方向外側に傾斜状検出部を突出形成し、反射型センサを傾斜状検出部に対向する位置に配設したことを特徴とするモータ駆動制御装置。 An encoder attached to a shaft of a rotating body that is driven to rotate by a motor, a transmission type sensor that detects a slit provided in the encoder, and a periodic variation of the rotating body based on an output from the transmission type sensor A motor drive control device comprising: a control means for controlling the drive of the motor;
A motor drive control device characterized in that an inclined detector is formed on the outer side in the axial direction of the encoder, and a reflective sensor is disposed at a position facing the inclined detector. モータによって回転駆動される回転体の軸に取り付けられたエンコーダと、該エンコーダに設けたスリットを検出する透過型センサと、該透過型センサからの出力に基いて回転体の周期変動を低減するようにモータの駆動を制御する制御手段と、を備えたモータ駆動制御装置において、
前記エンコーダに凹状検出部を設け、該凹状検出部の凹状被検出面に前記反射型センサを対向配置したことを特徴とするモータ駆動制御装置。 An encoder attached to the shaft of a rotating body that is rotationally driven by a motor, a transmission type sensor that detects a slit provided in the encoder, and a periodic variation of the rotating body based on an output from the transmission type sensor A motor drive control device comprising: a control means for controlling the drive of the motor;
A motor drive control device characterized in that a concave detector is provided in the encoder, and the reflective sensor is disposed opposite to a concave detection surface of the concave detector. 請求項１乃至５のいずれか一項に記載のモータ駆動制御装置を搭載したことを特徴とする画像形成装置。   An image forming apparatus comprising the motor drive control device according to claim 1.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300414C (en) * 2005-03-30 2007-02-14 中国水利水电科学研究院 Mechanical clutch protector of automatic control gate

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JPH03178104A (en) * 1989-12-07 1991-08-02 Sumitomo Heavy Ind Ltd Manufacture of oxide base superconducting coil
JPH08286494A (en) * 1995-04-11 1996-11-01 Ricoh Co Ltd Image forming device
JP2002006688A (en) * 2000-06-23 2002-01-11 Hitachi Koki Co Ltd Detecting unit for image carrying member and image forming device using same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03178104A (en) * 1989-12-07 1991-08-02 Sumitomo Heavy Ind Ltd Manufacture of oxide base superconducting coil
JPH08286494A (en) * 1995-04-11 1996-11-01 Ricoh Co Ltd Image forming device
JP2002006688A (en) * 2000-06-23 2002-01-11 Hitachi Koki Co Ltd Detecting unit for image carrying member and image forming device using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300414C (en) * 2005-03-30 2007-02-14 中国水利水电科学研究院 Mechanical clutch protector of automatic control gate

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