JP2007225892A - Rotor-manufacturing method, polygon scanner unit, laser scanning unit, and image forming device - Google Patents

Rotor-manufacturing method, polygon scanner unit, laser scanning unit, and image forming device Download PDF

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JP2007225892A
JP2007225892A JP2006046794A JP2006046794A JP2007225892A JP 2007225892 A JP2007225892 A JP 2007225892A JP 2006046794 A JP2006046794 A JP 2006046794A JP 2006046794 A JP2006046794 A JP 2006046794A JP 2007225892 A JP2007225892 A JP 2007225892A
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rotor
mirror
metal
metal workpiece
manufacturing
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JP4909606B2 (en
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Jun Yoshida
準 吉田
Hideki Konno
秀樹 今野
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Ricoh Co Ltd
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Ricoh Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a rotor by using a method, capable of determining the revolution center and evenly arranging the mirror finished surfaces, without making the dimensional tolerances small in metal working, and to provide a polygon scanner unit manufactured thusly at a low cost. <P>SOLUTION: A first metal work 51 is fixed on a fixture 50, an intermediate component 53 on the first metal work 51, and a second metal work 54 on the intermediate component 53, all in the direction of the revolution shaft 2. The slides 56, 57 are brought into contact with the side 51d and the side 54b of both metal works. Both metal works are turned, by pressing the flat surface 12A of the flat component 11A and the flat surface 12B of the flat component 11B to the mirror surface 9a of the first metal work 51 and the mirror surface 9a of the second metal work 54, and the mirror surface other than the contact surface is made to face the rotating disk of the cutting tool. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、回転子の製造方法、ポリゴンスキャナユニット、レーザスキャンユニット及び画像形成装置に関し、特に複写機、プリンタ、ファクシミリ等の画像形成装置の光偏向器として用いられるポリゴンスキャナの回転子の製造方法等に関するものである。   The present invention relates to a method for manufacturing a rotor, a polygon scanner unit, a laser scan unit, and an image forming apparatus, and more particularly, to a method for manufacturing a rotor for a polygon scanner used as an optical deflector of an image forming apparatus such as a copying machine, a printer, or a facsimile machine. Etc.

従来、画像形成装置等に用いられるポリゴンミラーは、回転軸及びマグネットとともに回転子を構成し、画像形成装置等においては固定子に対して回転軸を中心に回転することが知られている。また、特許文献１にあるように、このポリゴンミラーの光反射面が鏡面加工によって加工されることも知られている。また、同文献では、部品点数の増加や高精度な接着の必要性がなく高耐久性を有し、製造が容易で回転体側面の歪曲の発生を防止できる回転多面鏡が提案されている。   Conventionally, it is known that a polygon mirror used in an image forming apparatus or the like constitutes a rotor together with a rotating shaft and a magnet, and the image forming apparatus or the like rotates around a rotating shaft with respect to a stator. Further, as disclosed in Patent Document 1, it is also known that the light reflecting surface of this polygon mirror is processed by mirror processing. Further, the same document proposes a rotating polygon mirror that has high durability without the need for an increase in the number of parts and high-precision bonding, can be easily manufactured, and can prevent the side surface of the rotating body from being distorted.

さて、図６は、ポリゴンミラーの従来例を示す分解斜視図である。画像形成装置等で用いられるポリゴンミラーとして、例えば図６に示すようなものが知られている。ポリゴンミラー１は、回転軸２及びマグネット３とともに回転子４を構成し、画像形成装置等においては不図示の固定子に対して回転軸２を中心に回転する。ポリゴンミラー１の基部５の外周にある６つの側面９ａ〜９ｆは鏡面加工された平滑な光反射面（鏡面）であり、その鏡面加工は次に示す図７の加工装置１０により行われる。   FIG. 6 is an exploded perspective view showing a conventional example of a polygon mirror. As a polygon mirror used in an image forming apparatus or the like, for example, the one shown in FIG. 6 is known. The polygon mirror 1 constitutes a rotor 4 together with the rotating shaft 2 and the magnet 3 and rotates around the rotating shaft 2 with respect to a stator (not shown) in an image forming apparatus or the like. Six side surfaces 9a to 9f on the outer periphery of the base 5 of the polygon mirror 1 are mirror-processed smooth light reflecting surfaces (mirror surfaces), and the mirror surface processing is performed by the processing apparatus 10 shown in FIG.

図７は、鏡面加工用の加工装置を示す概略断面図である。加工装置１０は、第１金属加工品２３を保持する受け台１４と、加圧治具１９により保持された第１金属加工品２３及び第２金属加工品２４の側面（鏡面加工前の側面）９ａ〜９ｆ（図６）を切削する切削工具１７と、この切削工具１７に対し第１金属加工品２３及び第２金属加工品２４の側面を平行に揃える平面部材１１を備える。   FIG. 7 is a schematic cross-sectional view showing a processing apparatus for mirror surface processing. The processing apparatus 10 includes a cradle 14 that holds the first metal workpiece 23, and side surfaces (side surfaces before mirror processing) of the first metal workpiece 23 and the second metal workpiece 24 that are held by the pressure jig 19. The cutting tool 17 which cuts 9a-9f (FIG. 6) and the planar member 11 which arrange | equalizes the side surface of the 1st metal workpiece 23 and the 2nd metal workpiece 24 with respect to this cutting tool 17 are provided.

保持装置１６は、角度割出し盤１３の上面にベースプレート２０が設けられ、その上面には凸部２０ａが設けられている。受け台１４の底部には凹部１４ａが設けられ、この凹部１４ａが凸部２０ａに係合して位置決めされている。受け台上面１４ｂは平滑かつ角度割出し盤１３に平行に仕上げられており、第１金属加工品２３の加工基準面である筒状部６（図６）の筒状部底面６ａが当接されるようになっている。   In the holding device 16, a base plate 20 is provided on the upper surface of the angle indexing board 13, and a convex portion 20a is provided on the upper surface. A concave portion 14a is provided at the bottom of the cradle 14, and the concave portion 14a is positioned by engaging with the convex portion 20a. The cradle upper surface 14 b is smooth and finished in parallel with the angle indexing plate 13, and the tubular portion bottom surface 6 a of the tubular portion 6 (FIG. 6) that is the processing reference surface of the first metal workpiece 23 is brought into contact therewith. It has become so.

また、受け台上面１４ｂの中央部には逃げ穴１５が形成されており、固定治具２１が嵌合されている。固定治具２１は、図８により明瞭に示すように、筒状の本体の上部にフランジ状の先端部２１ａを有しており、この先端部２１ａと第１金属加工品２３の内周面２３ａを嵌め合せることによって位置決めすることができる。   Further, a clearance hole 15 is formed at the center of the cradle upper surface 14b, and a fixing jig 21 is fitted therein. As shown more clearly in FIG. 8, the fixing jig 21 has a flange-shaped tip portion 21 a at the top of the cylindrical main body, and the tip portion 21 a and the inner peripheral surface 23 a of the first metal workpiece 23. Can be positioned by fitting.

切削工具１７は、第１金属加工品２３及び第２金属加工品２４を鏡面加工するために軸線Ｏ1を中心に鉛直面内で回転する回転円盤１８にバイト２２が取り付けられて構成されている。平面部材１１は、受け台上面１４ｂに垂直な平面部１２を有し、水平方向に稼動するように設けられている。水平方向に稼動することによって、第１金属加工品２３及び第２金属加工品２４の側面に平面部１２を押し当てることによって、第１金属加工品２３及び第２金属加工品２４の側面を揃える。 The cutting tool 17 is configured by attaching a cutting tool 22 to a rotating disk 18 that rotates in a vertical plane around an axis O 1 in order to mirror-finish the first metal workpiece 23 and the second metal workpiece 24. . The planar member 11 has a planar portion 12 perpendicular to the cradle upper surface 14b, and is provided to operate in the horizontal direction. By operating in the horizontal direction, the side surfaces of the first metal workpiece 23 and the second metal workpiece 24 are aligned by pressing the flat surface portion 12 against the side surfaces of the first metal workpiece 23 and the second metal workpiece 24. .

図８は図７の加工装置における第１金属加工品２３及び第２金属加工品２４の周辺を拡大して示す概略断面図で、図９は金属加工品上方の加圧装置を示す概略図である。   8 is a schematic cross-sectional view showing the periphery of the first metal processed product 23 and the second metal processed product 24 in the processing apparatus of FIG. 7 in an enlarged manner, and FIG. 9 is a schematic view showing a pressure device above the metal processed product. is there.

図８は、第１金属加工品２３及び第２金属加工品２４の位置決め方法も示している。まず、固定治具２１の先端部２１ａを第１金属加工品２３の内周面２３ａと嵌合させることで第１金属加工品２３の回転軸の中心と角度割り出し盤１３の軸線Ｏ2に一致させ、かつ、第１金属加工品２３の姿勢を水平にする。次に、第１金属加工品２３の上面の溝内周面２３ｃに第２金属加工品２４の内周面２４ａを嵌合させることで第２金属加工品２４の軸心と第１金属加工品２３の回転軸の中心を一致させ、第１金属加工品２３の溝底部２３ｄに第２金属加工品２４の加工基準面である筒状部底面６ａを当接させることで姿勢を水平にする。 FIG. 8 also shows a positioning method of the first metal workpiece 23 and the second metal workpiece 24. First, the front end 21a of the fixing jig 21 is fitted to the inner peripheral surface 23a of the first metal workpiece 23 so as to coincide with the center of the rotation axis of the first metal workpiece 23 and the axis O 2 of the angle indexer 13. In addition, the posture of the first metal workpiece 23 is made horizontal. Next, by fitting the inner peripheral surface 24a of the second metal processed product 24 to the groove inner peripheral surface 23c on the upper surface of the first metal processed product 23, the axis of the second metal processed product 24 and the first metal processed product are connected. The center of the rotating shaft 23 is made to coincide, and the cylindrical portion bottom surface 6a which is the processing reference surface of the second metal workpiece 24 is brought into contact with the groove bottom portion 23d of the first metal workpiece 23, thereby making the posture horizontal.

続いて、取り付けられた第１金属加工品２３及び第２金属加工品２４は、平面部材１１（図７）の平面部１２を一方の側面に押し当てることにより、第１金属加工品２３及び第２金属加工品２４の他方の側面９ａを切削工具１７の回転円盤１８に正対させる。そして、弾性部材２５を第２金属加工品２４の筒状部６に重なり合うようにポリゴンミラーの基部５上に載せて、後述するように、加圧装置３１（図９）を駆動させて加圧治具稼動部２７（図９）を下方に移動させ、加圧治具１９をゆっくり下降させる。その際に周壁部１９ｂの底面１９ａが弾性部材２５を押圧するように弾性部材２５の位置を微調整する。   Subsequently, the attached first metal workpiece 23 and second metal workpiece 24 press the flat surface portion 12 of the planar member 11 (FIG. 7) against one side surface, whereby the first metal workpiece 23 and the second metal workpiece 24 are pressed. The other side surface 9 a of the two metal workpiece 24 is directly opposed to the rotating disk 18 of the cutting tool 17. Then, the elastic member 25 is placed on the base portion 5 of the polygon mirror so as to overlap the cylindrical portion 6 of the second metal workpiece 24, and the pressurizing device 31 (FIG. 9) is driven to pressurize as will be described later. The jig operating part 27 (FIG. 9) is moved downward, and the pressure jig 19 is slowly lowered. At that time, the position of the elastic member 25 is finely adjusted so that the bottom surface 19 a of the peripheral wall portion 19 b presses the elastic member 25.

第１金属加工品２３及び第２金属加工品２４の側面９ａと回転円盤１８（図７）との距離関係を微調整し、その後に回転円盤１８を回転させ、両者を相対的に移動させつつ側面９ａをバイト２２（図７）により切削して側面９ａを鏡面加工する。以降、第１金属加工品２３をクランプしたまま角度割出し盤１３を分割回転させて側面９ｂ、９ｃ、…９ｆを順次回転円盤１８に正対させ、各側面９ｂ、９ｃ、…９ｆを上記同様の手順で鏡面加工し、加工終了後、加圧装置３１を上昇させて第１金属加工品２３及び第２金属加工品２４のクランプを解放することにより回転子４（図６）が得られる。   While finely adjusting the distance relationship between the side surface 9a of the first metal processed product 23 and the second metal processed product 24 and the rotary disk 18 (FIG. 7), the rotary disk 18 is rotated and the two are relatively moved. The side surface 9a is cut with a cutting tool 22 (FIG. 7) to mirror-process the side surface 9a. Thereafter, the angle indexing plate 13 is rotated while the first metal processed product 23 is clamped so that the side surfaces 9b, 9c,... 9f are sequentially opposed to the rotating disk 18, and the side surfaces 9b, 9c,. The rotor 4 (FIG. 6) is obtained by raising the pressure device 31 and releasing the clamps of the first metal processed product 23 and the second metal processed product 24 after finishing the mirror surface processing according to the above procedure.

図９について説明すると、保持治具２９は、円筒形状の棒状部材２６を有しており、油、空気等の圧力で棒状部材２６を上下方向に移動する構造となっており、棒状部材２６の先端部２６ａには加圧治具稼動部２７が締結されている。加圧治具稼動部２７には支持棒２８が取り付けられ、保持治具２９に取り付けられたスライドガイド３２を介して加圧治具稼動部２７が上下に移動する。この棒状部材２６と平行するように支持棒２８が設けられて構成されている。これにより、加圧装置３１にて加圧治具稼動部２７が上下方向に移動し、規定されるストロークの分だけ上下方向に稼動可能となっている。   Referring to FIG. 9, the holding jig 29 has a cylindrical rod-shaped member 26 and has a structure in which the rod-shaped member 26 is moved in the vertical direction by the pressure of oil, air, etc. A pressing jig operating portion 27 is fastened to the tip end portion 26a. A support rod 28 is attached to the pressurizing jig operating portion 27, and the pressurizing jig operating portion 27 moves up and down via a slide guide 32 attached to the holding jig 29. A support bar 28 is provided so as to be parallel to the bar-shaped member 26. Thereby, the pressurizing jig operating unit 27 is moved in the vertical direction by the pressurizing device 31 and can be operated in the vertical direction by a prescribed stroke.

ところで、近年、画像形成装置等については、低コスト化と高性能化（高画質化）の要求が厳しく、これに用いられる回転子についても低コストで高精度であることが求められている。例えば、回転子の回転中心からミラー面までの距離公差について、要求値は、今までの５０μｍから３０μｍへと引き上げられている。   By the way, in recent years, there has been a strict demand for cost reduction and high performance (high image quality) for image forming apparatuses and the like, and a rotor used therefor is also required to be low cost and high accuracy. For example, with respect to the distance tolerance from the rotation center of the rotor to the mirror surface, the required value is increased from 50 μm so far to 30 μm.

そのため、回転子の回転中心からミラー面までの距離公差を満足するには治具の回転中心と回転子の回転中心を揃える必要があるが、複数個の回転子を平面部材で突き当て治具に押し当てて位置を揃えようとすると、外形の小さい回転子は、外形寸法のばらつきにより、位置合せのための平面部材に届かず回転中心位置が揃わないため、回転子の回転中心からミラー面までの距離公差の要求値を満足できない。また、平面部材に届かない回転子もあることから面が揃わないため、鏡面加工時に挽き残ることもあり、金属加工品の外形寸法公差を狭め、同じような寸法の金属加工品に対して鏡面加工を行う必要が生じる。
特開２００１−２２８４３２号公報 Therefore, in order to satisfy the distance tolerance from the rotation center of the rotor to the mirror surface, it is necessary to align the rotation center of the jig with the rotation center of the rotor. If the rotor is pressed to align the position, the rotor with a small outer shape will not reach the planar member for alignment due to variations in the outer dimensions and the center of rotation will not be aligned. Cannot meet the required distance tolerance. In addition, because there are rotors that do not reach the flat member, the surfaces are not aligned, so they may remain unfinished during mirror finishing, narrowing the tolerances on the outer dimensions of metal workpieces, and mirror surfaces for metal workpieces with similar dimensions. It becomes necessary to perform processing.
JP 2001-228432 A

しかしながら、金属加工品の外形寸法公差を狭めて対応すると、金属加工品の部品単価が上がるため回転子のコストが上昇してしまい、要求される低コスト化に反することになる。そこで、本発明は、金属加工品の外形寸法公差を狭めることなく回転中心位置及び鏡面加工面を揃えることが可能な位置決め方法を用いて回転子を製造し、該製造により低コストなポリゴンスキャナユニットを提供することを目的とする。   However, if the tolerance of the outer dimension of the metal workpiece is narrowed, the unit cost of the metal workpiece will increase, resulting in an increase in the cost of the rotor, which is against the required cost reduction. Therefore, the present invention manufactures a rotor using a positioning method capable of aligning the rotation center position and the mirror-finished surface without narrowing the outer dimensional tolerance of a metal workpiece, and a polygon scanner unit that is low-cost by the manufacturing. The purpose is to provide.

かかる目的を達成するために、請求項１記載の発明は、鏡面加工される複数の側面部を周方向に有する正多角柱状の水平面部と、前記水平面部の重心を前記側面部と平行に通る回転軸を中心に配した中空円筒形状のロータ部と、を有する回転子を前記回転軸の軸方向に複数個重ね合わせた回転子の製造方法において、前記回転子と同数の独立して稼動する平面部材を用いて前記各回転子の側面部を揃え、前記側面部を切削する切削手段により鏡面加工することを特徴とする。   In order to achieve this object, the invention according to claim 1 is a regular polygonal columnar horizontal plane part having a plurality of mirror-processed side surface parts in the circumferential direction, and passes through the center of gravity of the horizontal plane part in parallel with the side surface part. In a method of manufacturing a rotor in which a plurality of rotors having a hollow cylindrical rotor portion arranged around a rotation shaft are overlapped in the axial direction of the rotation shaft, the same number of rotors are independently operated. A flat surface member is used to align the side surfaces of the rotors, and mirror processing is performed by a cutting means for cutting the side surfaces.

また、請求項２記載の発明は、請求項１に記載の回転子の製造方法において、前記平面部材は、前記回転子の側面部と面接触する面接触部を有することを特徴とする。   According to a second aspect of the present invention, in the method for manufacturing a rotor according to the first aspect, the planar member has a surface contact portion in surface contact with a side surface portion of the rotor.

また、請求項３記載の発明は、請求項２に記載の回転子の製造方法において、前記平面部材は、前記回転子の側面部に前記面接触部を押し付けて前記回転子を回転させ位置決めし、面接触する側面部とは別の前記側面部を前記切削手段に正対させることを特徴とする。   According to a third aspect of the present invention, in the rotor manufacturing method according to the second aspect, the planar member presses the surface contact portion against a side surface portion of the rotor to rotate and position the rotor. The side part different from the side part in surface contact is directly opposed to the cutting means.

また、請求項４記載の発明は、請求項３に記載の回転子の製造方法において、前記平面部材は、前記回転軸と直交する方向に平行移動して前記回転子を位置決めすることを特徴とする。   According to a fourth aspect of the present invention, in the method for manufacturing a rotor according to the third aspect, the planar member translates in a direction perpendicular to the rotation axis to position the rotor. To do.

また、請求項５記載の発明は、請求項１から４に記載の回転子の製造方法を使用して製造されたポリゴンミラーを搭載することを特徴とするポリゴンスキャナユニットである。   According to a fifth aspect of the present invention, there is provided a polygon scanner unit comprising a polygon mirror manufactured by using the rotor manufacturing method according to the first to fourth aspects.

また、請求項６記載の発明は、請求項５に記載のポリゴンスキャナユニットを搭載することを特徴とするレーザスキャンユニットである。   According to a sixth aspect of the present invention, there is provided a laser scan unit comprising the polygon scanner unit according to the fifth aspect.

また、請求項７記載の発明は、請求項６に記載のレーザスキャンユニットを搭載することを特徴とする画像形成装置である。   According to a seventh aspect of the present invention, there is provided an image forming apparatus including the laser scan unit according to the sixth aspect.

本発明によれば、金属加工品の外形寸法公差を狭めることなく回転中心位置及び鏡面加工面を揃えることが可能な位置決め方法を用いて回転子を製造することができ、該製造により低コストなポリゴンスキャナユニットが提供される。   According to the present invention, a rotor can be manufactured using a positioning method capable of aligning the rotation center position and the mirror-finished surface without narrowing the outer dimensional tolerance of the metal workpiece, and the manufacturing can reduce the cost. A polygon scanner unit is provided.

以下、図面を参照して、本発明の実施形態について説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の実施形態において用いられる金属加工品（ポリゴンミラー）の一例を示す分解斜視図である。当該金属加工品は、正多角柱状の水平面部に相当する基部５と中空円筒形状のロータ部に相当する筒状部６とからなり、基部５は、外周に６つの側面９ａ〜９ｆを有し、上部に突出部を有している。本実施形態では、以下に述べるように、外形寸法にばらつきのある金属加工品に対してその回転中心位置及び鏡面加工面を揃えて鏡面加工を行う。   FIG. 1 is an exploded perspective view showing an example of a metal workpiece (polygon mirror) used in the embodiment of the present invention. The metal workpiece includes a base portion 5 corresponding to a horizontal plane portion having a regular polygonal column shape and a cylindrical portion 6 corresponding to a hollow cylindrical rotor portion, and the base portion 5 has six side surfaces 9a to 9f on the outer periphery. , Has a protrusion at the top. In the present embodiment, as will be described below, mirror processing is performed on a metal workpiece having a variation in external dimensions by aligning the rotation center position and the mirror processing surface.

図２は本実施形態における鏡面加工用の加工装置を示す概略断面図で、図５は本実施形態における金属加工品上方の加圧装置を示す概略断面図である。本実施形態の加工装置は、回転子の形状や外形寸法がそれぞれ異なる場合であっても、複数個の回転子を重ね合わせて一度に鏡面加工を行うことができる構成となっている。   FIG. 2 is a schematic cross-sectional view showing a mirror surface processing apparatus in the present embodiment, and FIG. 5 is a schematic cross-sectional view showing a pressurizing device above the metal workpiece in the present embodiment. The processing apparatus according to the present embodiment is configured to perform mirror surface processing at a time by superimposing a plurality of rotors even when the shapes and outer dimensions of the rotors are different.

本実施形態の加工装置が従来のものと異なる点は、金属加工品のみを回転軸の軸方向に重ね合わせるのではなく間に中間部材を介在させる点、金属加工品の筒状部６側面に該軸方向と直交する方向から当接させる突き立てスライドを有する点、金属加工品の基部５外周の側面に該軸方向と直交する方向から押し付けて金属加工品を回転させる平面部材を金属加工品に応じて複数有する点である。従来と共通する構成の説明は極力省略し、相違する点について詳細に述べることとする。   The processing apparatus of the present embodiment is different from the conventional one in that only the metal workpiece is not overlapped in the axial direction of the rotating shaft, but an intermediate member is interposed therebetween, on the side surface of the cylindrical portion 6 of the metal workpiece. A metal workpiece is a flat member for rotating the metal workpiece by pressing it from the direction orthogonal to the axial direction to the side surface of the outer periphery of the base portion 5 of the metal workpiece, the point having a projecting slide abutting from the direction orthogonal to the axial direction It is a point having a plurality according to The description of the configuration common to the prior art will be omitted as much as possible, and differences will be described in detail.

図３は、図２に示した加工装置の第１金属加工品５１及び第２金属加工品５４の周辺を拡大して示す概略断面図で、第１金属加工品５１及び第２金属加工品５４は、以下のように位置決めされる。   3 is an enlarged schematic cross-sectional view showing the periphery of the first metal processed product 51 and the second metal processed product 54 of the processing apparatus shown in FIG. 2, and the first metal processed product 51 and the second metal processed product 54. Are positioned as follows.

まず、固定治具５０の先端部５０ａに第１金属加工品５１の内周面５１ａを滑合させ、受け台上面５２に第１金属加工品５１の筒状部６（図１）の底面を当接させ取り付けて位置決めを行う。中間部材５３は、その外周縁上面５３ａとその下方に位置する底面５３ｂとを互いに平行状態とし、かつ、外周縁上面５３ａ及び底面５３ｂの両面は平滑に加工されており、上面の中央に突出した先端部５３ｃ及び中空円筒状の内周面５３ｄは同軸で平滑に加工されている。   First, the inner peripheral surface 51a of the first metal workpiece 51 is slid on the tip 50a of the fixing jig 50, and the bottom surface of the cylindrical portion 6 (FIG. 1) of the first metal workpiece 51 is placed on the cradle upper surface 52. Position by abutting and mounting. The intermediate member 53 has an outer peripheral top surface 53a and a bottom surface 53b positioned below the parallel state, and both the outer peripheral top surface 53a and the bottom surface 53b are processed to be smooth and project to the center of the top surface. The tip 53c and the hollow cylindrical inner peripheral surface 53d are coaxially and smoothly processed.

次に、第１金属加工品５１の突出部外周面５１ｂに中間部材５３の内周面５３ｄを滑合させ、第１金属加工品５１の外周縁上面５１ｃに中間部材５３の底面５３ｂを当接させて、第１金属加工品５１の上部に中間部材５３を取り付けて位置決めする。また、第１金属加工品５１の突出部外周面５１ｂと中間部材５３の内周面５３ｄには、固定位置決め時に水平方向に移動できるようにクリアランスが設けてある。   Next, the inner peripheral surface 53d of the intermediate member 53 is slid on the protrusion outer peripheral surface 51b of the first metal processed product 51, and the bottom surface 53b of the intermediate member 53 is brought into contact with the outer peripheral upper surface 51c of the first metal processed product 51. Then, the intermediate member 53 is attached to the upper part of the first metal workpiece 51 and positioned. Further, a clearance is provided on the outer peripheral surface 51b of the first metal workpiece 51 and the inner peripheral surface 53d of the intermediate member 53 so that it can move in the horizontal direction during fixed positioning.

次に、中間部材５３の上面中央から突出した先端部５３ｃの外周に第２金属加工品５４の内周面５４ａを滑合させ、中間部材５３の外周縁上面５３ａに第２金属加工品５４の筒状部６の底面を当接させることにより、中間部材５３の上部で第２金属加工品５４を取り付けて位置決めする。また、第２金属加工品５４の内周面５４ａと中間部材５３の先端部５３ｃには固定位置決め時に水平方向に移動できるようにクリアランスが設けてある。   Next, the inner peripheral surface 54a of the second metal workpiece 54 is slid on the outer periphery of the tip 53c protruding from the center of the upper surface of the intermediate member 53, and the second metal workpiece 54 is aligned with the outer peripheral upper surface 53a of the intermediate member 53. By bringing the bottom surface of the tubular portion 6 into contact, the second metal workpiece 54 is attached and positioned on the upper portion of the intermediate member 53. In addition, a clearance is provided on the inner peripheral surface 54a of the second metal workpiece 54 and the distal end portion 53c of the intermediate member 53 so that it can move in the horizontal direction during fixed positioning.

そして、上述したように複数個の金属加工品を重ね合わせた状態で、後退している突き当てスライド５７及び突き当てスライド５６を搭載した突き当て治具５８を金属加工品の軸線Ｏ2に対して直交する方向に水平移動させ、第２金属加工品５４の筒状部６の外周面５４ｂと第１金属加工品５１の筒状部６の外周面５１ｄに、突き当てスライド５７と突き当てスライド５６を当接させる。 Then, as described above, the abutting jig 58 on which the abutting slide 57 and the abutting slide 56 are mounted with respect to the axis O 2 of the metal workpiece in a state where the plurality of metal workpieces are overlapped with each other. And abutting slide 57 and abutting slide on the outer peripheral surface 54b of the cylindrical portion 6 of the second metal workpiece 54 and the outer peripheral surface 51d of the cylindrical portion 6 of the first metal workpiece 51. 56 is brought into contact.

突き当て治具５８において、突き当てスライド５７及び突き当てスライド５６は、突き当て基準面５７ｂであらかじめ突出しており、突出量が軸線Ｏ2に対して整列度３μｍ以下で設定されている。全ての当接面が一致するとき、第２金属加工品５４と第１金属加工品５１は、クリアランス範囲内で金属加工部品の軸線Ｏ2に対して直交方向に水平移動し位置決めされる。 In the abutting jig 58, the abutting slide 57 and the abutting slide 56 project in advance at the abutting reference surface 57b, and the projecting amount is set with an alignment degree of 3 μm or less with respect to the axis O 2 . When all the contact surfaces coincide with each other, the second metal workpiece 54 and the first metal workpiece 51 are horizontally moved and positioned in the direction perpendicular to the axis O 2 of the metal workpiece within the clearance range.

このとき、突き当て基準面５７ｂと突き当てスライド５７及び突き当てスライド５６との位置関係は、突き当て面５７ａ及び突き当て面５６ａと外周面５４ｂ及び外周面５１ｄの当接面で３μｍ以下の精度を確保しており、軸線Ｏ2に対して第２金属加工品５４と第１金属加工品５１の軸線Ｏ2は５０μｍ以下で一致させることが可能となる。 At this time, the positional relationship between the abutting reference surface 57b and the abutting slide 57 and the abutting slide 56 is such that the abutting surface 57a, the abutting surface 56a, the outer peripheral surface 54b, and the abutting surface of the outer peripheral surface 51d have an accuracy of 3 μm or less. Therefore, the axis O 2 of the second metal workpiece 54 and the first metal workpiece 51 can be matched with the axis O 2 at 50 μm or less.

そして、平行部材１１Ａを軸線Ｏ2に対して直交する方向に水平移動させ、鏡面加工する側面と面接触する面接触部に相当する平面部１２Ａを第１金属加工品５１の基部５（図１）外周の側面に押し付け、第１金属加工品５１を回転させ位置決めを行う。また、第２金属加工品５４に対しても同様で、平行部材１１Ｂを軸線Ｏ2に対して直交する方向に水平移動させ、第２金属加工品５４の基部５外周の側面に平面部１２Ｂを押し付け回転させ、第２金属加工品５４の位置決めを行う。 Then, the parallel member 11A is horizontally moved in a direction orthogonal to the axis O 2 , and the flat surface portion 12A corresponding to the surface contact portion that makes surface contact with the side surface to be mirror-finished is replaced with the base portion 5 (FIG. 1). ) Press against the outer peripheral side surface and rotate the first metal workpiece 51 for positioning. The same applies to the second metal workpiece 54. The parallel member 11B is horizontally moved in a direction perpendicular to the axis O 2 , and the flat portion 12B is provided on the side surface of the outer periphery of the base 5 of the second metal workpiece 54. The second metal workpiece 54 is positioned by pressing and rotating.

なお、平行部材は、各金属加工品に対応してその数だけ設けられ、金属加工品のそれぞれの外形寸法に合わせて水平移動させ、位置決めを行うことが可能である。   Note that the number of parallel members corresponding to each metal workpiece is provided, and the parallel members can be horizontally moved and positioned according to the respective outer dimensions of the metal workpiece.

図４は、図３で拡大した加工装置の概略図を上方から見たものである。図４に示すように、突き立てスライド５７で当接された第１金属加工品５１及び第２金属加工品５４の基部５外周の側面に対して、平面部材１１の平面部１２を押し当てることにより、金属加工品を回転させて鏡面加工される基部５外周の接触面とは別の側面を切削工具１７の回転円盤１８に正対させる。   FIG. 4 is a schematic view of the processing apparatus enlarged in FIG. 3 viewed from above. As shown in FIG. 4, the flat surface portion 12 of the flat member 11 is pressed against the side surfaces of the outer periphery of the base portion 5 of the first metal processed product 51 and the second metal processed product 54 that are in contact with the protruding slide 57. Thus, the side surface different from the contact surface on the outer periphery of the base 5 that is mirror-finished by rotating the metal workpiece is made to face the rotating disk 18 of the cutting tool 17.

上述したような位置決め方法により、複数個の金属加工品を重ねて加工処理することができ、また、金属加工品の外形寸法にばらつきがある場合であっても、その回転中心位置及び鏡面加工面を高精度に揃えて鏡面加工の処理を行うことが可能となる。   With the positioning method as described above, a plurality of metal workpieces can be stacked and processed, and even if there are variations in the outer dimensions of the metal workpiece, the rotation center position and mirror finish surface Can be mirror-finished with high precision.

そして、位置決めしてから鏡面加工するまで動作については従来と同様で、弾性部材２５を第２金属加工品５４の基部５上に載せ、弾性部材２５の位置を微調整しながら加圧装置３１（図５）を駆動させた後、第１金属加工品５１及び第２金属加工品５４の基部５外周の側面９ａと回転円盤１８（図２）との距離関係を微調整し、両者を相対的に移動させつつ側面９ａをバイト２２により切削して鏡面加工する。   The operation from the positioning to the mirror finishing is the same as in the prior art. The elastic member 25 is placed on the base 5 of the second metal workpiece 54, and the position of the elastic member 25 is finely adjusted while the pressure device 31 ( After driving FIG. 5), the distance relationship between the side surface 9a of the outer periphery of the base 5 of the first metal workpiece 51 and the second metal workpiece 54 and the rotary disk 18 (FIG. 2) is finely adjusted, The side surface 9a is cut by the cutting tool 22 while being moved to a mirror surface.

以降、第１金属加工品５１及び第２金属加工品５４をクランプしたまま角度割出し盤１３を分割回転させて側面９ｂ、９ｃ、…９ｆを順次回転円盤１８に正対させ、各側面９ｂ、９ｃ、…９ｆを上記同様の手順で鏡面加工し、加工終了後、加圧装置３１を上昇させ第１金属加工品５１及び第２金属加工品５４のクランプを解放することにより回転子４が得られる。   Thereafter, while the first metal workpiece 51 and the second metal workpiece 54 are clamped, the angle indexing plate 13 is split and rotated so that the side surfaces 9b, 9c,. 9c,... 9f are mirror-finished in the same procedure as described above, and the rotor 4 is obtained by lifting the pressurizing device 31 and releasing the clamps of the first metal workpiece 51 and the second metal workpiece 54 after finishing the machining. It is done.

このようにして複数個の金属加工品を回転軸方向に重ね合わせて高精度に回転中心位置及び鏡面加工面を位置決めすることができ、また金属加工品の形状や外形寸法に関係なく１度の鏡面加工にて複数個の回転子を得ることができるようになる。   In this way, a plurality of metal workpieces can be overlapped in the direction of the rotation axis, and the rotation center position and the mirror finish surface can be positioned with high accuracy, and can be performed once regardless of the shape and external dimensions of the metal workpiece. A plurality of rotors can be obtained by mirror finishing.

補足として述べると、本実施形態における金属加工品の各部位は、軸線Ｏ2に対して同軸加工が施されており、軸線Ｏ2と各外周の突き当て面及び内周面は平行かつ垂直に平滑加工されている。 As a supplement, each part of the metal workpiece in the present embodiment is coaxially processed with respect to the axis O 2 , and the axis O 2 and the abutting surface and inner peripheral surface of each outer periphery are parallel and perpendicular. Smoothed.

また、金属加工品のミラー面に鏡面加工を施した後に回転軸等を焼き嵌めて圧入すると、内部応力の発生によりミラー面の形状が変化するため鏡面品質の悪化につながる。そこで、鏡面加工前に回転軸等を焼き嵌め圧入して、貫通穴のない状態の形状で鏡面加工することにより、内部応力の影響を受けずに所望の鏡面品質を得ることができる。また、貫通穴のない形状にすることにより、回転子の剛性が向上し、切削抵抗等の応力によるミラー面変形量を低減することができ、ミラー面の鏡面品質を向上させることができる。   Further, if the rotating shaft or the like is shrink-fitted and press-fitted after the mirror surface of the metal workpiece is mirror-finished, the shape of the mirror surface changes due to the generation of internal stress, leading to deterioration of the mirror surface quality. Therefore, the desired mirror surface quality can be obtained without being affected by the internal stress by shrink-fitting the rotary shaft or the like before the mirror surface processing and performing the mirror surface processing without the through hole. Further, by making the shape without through holes, the rigidity of the rotor is improved, the amount of deformation of the mirror surface due to stress such as cutting resistance can be reduced, and the mirror surface quality of the mirror surface can be improved.

そして、各々の回転子の外周面に当接させて回転子の軸線からのミラー面の距離を高精度に一致させることが可能となり、回転子の品質を向上させ、ポリゴンスキャナユニットの性能向上となる。   The distance between the mirror surface and the axis of the rotor can be matched with high accuracy by contacting the outer peripheral surface of each rotor, improving the quality of the rotor and improving the performance of the polygon scanner unit. Become.

なお、上述する実施形態は、本発明の好適な実施形態であり、上記実施形態のみに本発明の範囲を限定するものではなく、本発明の要旨を逸脱しない範囲において種々の変更を施した形態での実施が可能である。   The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

上記の実施形態によれば、回転子の数に合わせて平行部材を用意することで、側面部の寸法精度の影響を受けずに回転子の中心位置と取付け角度を揃えることができ、金属加工品の要求精度が低くなることから金属加工品の部品単価を下げることが可能となる。   According to the above embodiment, by preparing parallel members according to the number of rotors, the center position and the mounting angle of the rotor can be aligned without being affected by the dimensional accuracy of the side surface, and metal processing Since the required accuracy of the product is lowered, it is possible to reduce the unit price of the metal processed product.

また、上記の実施形態によれば、部品要求仕様の目標値である、回転子の回転中心からミラー面までの距離公差３０μｍが達成可能な高品位なポリゴンスキャナユニットを提供することができる。   In addition, according to the above embodiment, it is possible to provide a high-quality polygon scanner unit that can achieve a target tolerance value of 30 μm from the rotation center of the rotor to the mirror surface, which is a target value of the component requirement specification.

また、上記の実施形態によれば、部品要求仕様の目標値である、回転子の回転中心からミラー面までの距離公差３０μｍが達成可能となることで、ビーム径の要求仕様を満足する高品位なレーザスキャンユニットを提供することができる。   In addition, according to the above-described embodiment, the target tolerance value of the component required specification, which is a distance tolerance from the rotation center of the rotor to the mirror surface of 30 μm, can be achieved, so that high quality satisfying the required specification of the beam diameter is achieved. A laser scanning unit can be provided.

また、上記の実施形態によれば、レーザスキャンユニットのビーム径要求仕様を満足することで、カラー階調の要求仕様を満足する高品位な画像形成装置を提供することができる。   Further, according to the above-described embodiment, it is possible to provide a high-quality image forming apparatus that satisfies the required specification of color gradation by satisfying the required beam diameter specification of the laser scanning unit.

本発明の実施形態における金属加工品（ポリゴンミラー）の一例を示す分解斜視図である。It is a disassembled perspective view which shows an example of the metal workpiece (polygon mirror) in embodiment of this invention. 本発明の実施形態における鏡面加工装置の概略断面図である。It is a schematic sectional drawing of the mirror surface processing apparatus in embodiment of this invention. 本発明の実施形態における鏡面加工装置の金属加工品の周辺を拡大した概略断面図である。It is the schematic sectional drawing which expanded the periphery of the metal workpiece of the mirror surface processing apparatus in embodiment of this invention. 本発明の実施形態における鏡面加工装置の上面図である。It is a top view of the mirror surface processing apparatus in embodiment of this invention. 本発明の実施形態における加圧装置の概略断面図である。It is a schematic sectional drawing of the pressurization apparatus in embodiment of this invention. 従来における金属加工品の一例を示す分解斜視図である。It is a disassembled perspective view which shows an example of the conventional metal workpiece. 従来における鏡面加工装置の概略断面図である。It is a schematic sectional drawing of the conventional mirror surface processing apparatus. 従来における鏡面加工装置の金属加工品の周辺を拡大した概略断面図である。It is the schematic sectional drawing which expanded the periphery of the metal workpiece of the conventional mirror surface processing apparatus. 従来における加圧装置の概略断面図である。It is a schematic sectional drawing of the pressurization apparatus in the past.

符号の説明Explanation of symbols

１ ポリゴンミラー
２ 回転軸
３ マグネット
４ 回転子
５ 基部
６ 筒状部
１０ 加工装置
１１Ａ，１１Ｂ 平面部材
１２Ａ，１２Ｂ 平面部
１３ 角度割出し盤
１４ 受け台
１５ 逃げ穴
１６ 保持装置
１７ 切削工具
１８ 回転円盤
１９ 加圧治具
２０ ベースプレート
２２ バイト
５０ 固定治具
５１ 第１金属加工品
５３ 中間部材
５４ 第２金属加工品
５６，５７ 突き立てスライド
５８ 突き立て治具
Ｏ1，Ｏ2 軸線 DESCRIPTION OF SYMBOLS 1 Polygon mirror 2 Rotating shaft 3 Magnet 4 Rotor 5 Base 6 Tubular part 10 Processing apparatus 11A, 11B Plane member 12A, 12B Plane part 13 Angle indexing board 14 Receptacle 15 Escape hole 16 Holding apparatus 17 Cutting tool 18 Rotating disk 19 Pressurizing jig 20 Base plate 22 Bit 50 Fixing jig 51 First metal processed product 53 Intermediate member 54 Second metal processed product 56, 57 Ejecting slide 58 Ejecting jig O 1 , O 2 axis

Claims (7)

鏡面加工される複数の側面部を周方向に有する正多角柱状の水平面部と、前記水平面部の重心を前記側面部と平行に通る回転軸を中心に配した中空円筒形状のロータ部と、を有する回転子を前記回転軸の軸方向に複数個重ね合わせた回転子の製造方法において、
前記回転子と同数の独立して稼動する平面部材を用いて前記各回転子の側面部を揃え、前記側面部を切削する切削手段により鏡面加工することを特徴とする回転子の製造方法。 A regular polygonal columnar horizontal surface portion having a plurality of side surfaces to be mirror-finished in a circumferential direction, and a hollow cylindrical rotor portion centered on a rotation axis passing through the center of gravity of the horizontal surface portion in parallel with the side surface portions, In a method for manufacturing a rotor in which a plurality of rotors having a plurality of rotors are stacked in the axial direction of the rotation shaft,
A method of manufacturing a rotor, comprising using the same number of independently operated planar members as the rotor, aligning the side surfaces of the rotors, and performing mirror finishing by a cutting means for cutting the side surfaces. 前記平面部材は、前記回転子の側面部と面接触する面接触部を有することを特徴とする請求項１に記載の回転子の製造方法。   The method for manufacturing a rotor according to claim 1, wherein the planar member has a surface contact portion that makes surface contact with a side surface portion of the rotor. 前記平面部材は、前記回転子の側面部に前記面接触部を押し付けて前記回転子を回転させ位置決めし、面接触する側面部とは別の前記側面部を前記切削手段に正対させることを特徴とする請求項２に記載の回転子の製造方法。   The planar member presses the surface contact portion against the side surface portion of the rotor to rotate and position the rotor, and causes the side surface portion different from the side surface portion in surface contact to face the cutting means. The method of manufacturing a rotor according to claim 2, wherein 前記平面部材は、前記回転軸と直交する方向に平行移動して前記回転子を位置決めすることを特徴とする請求項３に記載の回転子の製造方法。   The method for manufacturing a rotor according to claim 3, wherein the planar member is translated in a direction orthogonal to the rotation axis to position the rotor. 請求項１から４に記載の回転子の製造方法を使用して製造されたポリゴンミラーを搭載することを特徴とするポリゴンスキャナユニット。   5. A polygon scanner unit mounted with a polygon mirror manufactured using the method for manufacturing a rotor according to claim 1. 請求項５に記載のポリゴンスキャナユニットを搭載することを特徴とするレーザスキャンユニット。   A laser scanning unit, comprising the polygon scanner unit according to claim 5. 請求項６に記載のレーザスキャンユニットを搭載することを特徴とする画像形成装置。   An image forming apparatus comprising the laser scan unit according to claim 6.
JP2006046794A 2006-02-23 2006-02-23 Manufacturing method of rotor Expired - Fee Related JP4909606B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001228432A (en) * 1999-04-09 2001-08-24 Ricoh Co Ltd Processing method of rotating body, rotating polygon mirror, rotation unit, and rotating body
JP2002221683A (en) * 2001-01-26 2002-08-09 Ricoh Co Ltd Polygon mirror and its manufacturing method
JP2004184761A (en) * 2002-12-04 2004-07-02 Ricoh Co Ltd Polygon mirror, optical deflector of polygon mirror, machining tool for polygon mirror, and method and device of manufacturing polygon mirror

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001228432A (en) * 1999-04-09 2001-08-24 Ricoh Co Ltd Processing method of rotating body, rotating polygon mirror, rotation unit, and rotating body
JP2002221683A (en) * 2001-01-26 2002-08-09 Ricoh Co Ltd Polygon mirror and its manufacturing method
JP2004184761A (en) * 2002-12-04 2004-07-02 Ricoh Co Ltd Polygon mirror, optical deflector of polygon mirror, machining tool for polygon mirror, and method and device of manufacturing polygon mirror

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