JP4692224B2 - Developing device, toner particle carrying roller, image forming apparatus, image forming system, and toner particle supply roller manufacturing method - Google Patents

Developing device, toner particle carrying roller, image forming apparatus, image forming system, and toner particle supply roller manufacturing method Download PDF

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JP4692224B2
JP4692224B2 JP2005317375A JP2005317375A JP4692224B2 JP 4692224 B2 JP4692224 B2 JP 4692224B2 JP 2005317375 A JP2005317375 A JP 2005317375A JP 2005317375 A JP2005317375 A JP 2005317375A JP 4692224 B2 JP4692224 B2 JP 4692224B2
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roller
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JP2007121948A (en
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洋 加藤
陽一 山田
克巳 岡本
友洋 有賀
昇 櫻井
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セイコーエプソン株式会社
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本発明は、現像装置、トナー粒子担持ローラ、画像形成装置、画像形成システム、及び、トナー粒子供給ローラの製造方法に関する。 The present invention relates to a developing device, a toner particle carrying roller, an image forming apparatus, an image forming system, and a method for manufacturing a toner particle supply roller.

トナー粒子を用いて現像する現像装置としては、トナー粒子収容体に収容されたトナー粒子を担持して潜像を現像するためのトナー粒子担持ローラを備えた現像装置が知られている(例えば、特許文献1参照)。
このような現像装置は、トナー粒子担持ローラに担持されるトナー粒子の層厚を規制すると共に、トナー粒子を帯電させるために、トナー粒子が担持されたトナー粒子担持ローラに当接される層厚規制部材が設けられている。 In such a developing device, the layer thickness of the toner particles carried on the toner particle carrying roller is regulated, and the layer thickness abutted on the toner particle carrying roller in order to charge the toner particles. Regulatory members are provided. また、トナー粒子担持ローラは表面がサンドブラスト処理されて表面に細かな凹凸が設けられている。 Further, the surface of the toner particle-supporting roller is sandblasted to provide fine irregularities on the surface. トナー粒子はトナー粒子担持ローラの表面に担持されて層厚規制部材に押圧されることにより、凹凸を有する表面、層厚規制部材、及びトナー粒子同士と擦れ合いつつ転動して帯電される。 The toner particles are supported on the surface of the toner particle-supporting roller and pressed against the layer thickness regulating member, so that the toner particles roll and are charged while rubbing against the uneven surface, the layer thickness regulating member, and the toner particles.
特開2003−263018号公報Japanese Unexamined Patent Publication No. 2003-263018 As a developing device for developing using toner particles, a developing device including a toner particle carrying roller for carrying a toner particle contained in a toner particle containing body and developing a latent image is known (for example, Patent Document 1). As a developing device for developing using toner particles, a developing device including a toner particle carrying roller for carrying a toner particle contained in a toner particle containing body and developing a latent image is known (for example, Patent Document 1).
Such a developing device regulates the layer thickness of the toner particles carried on the toner particle carrying roller, and in order to charge the toner particles, the layer thickness brought into contact with the toner particle carrying roller carrying the toner particles. A regulating member is provided. Further, the surface of the toner particle carrying roller is sandblasted to have fine irregularities on the surface. When the toner particles are carried on the surface of the toner particle carrying roller and pressed against the layer thickness regulating member, the toner particles roll and be charged while rubbing against the irregular surface, the layer thickness regulating member, and the toner particles. Such a developing device regulates the layer thickness of the toner particles carried on the toner particle carrying roller, and in order to charge the toner particles, the layer thickness brought into contact with the toner particle carrying roller carrying the toner particles. A regulating member is Further, the surface of the toner particle carrying roller is sandblasted to have fine irregularities on the surface. When the toner particles are carried on the surface of the toner particle carrying roller and pressed against the layer thickness regulating member, the toner particles roll and be charged while rubbing against the irregular surface, the layer thickness regulating member, and the toner particles.
JP 2003-263018 A JP 2003-263018 A

このような現像装置は、トナー粒子担持ローラの表面の凹凸がサンドブラストにより形成されているので、凹部の大きさ、深さ、形状、及び、並び方が不均一である。また、表面の凹部は、ほぼ球形の粒子により掘られるため曲面を有しており、凸部は先端が尖っている。そして、凸部先端の高さも不均一であるため、担持されたトナー粒子を層厚規制部材にて押圧すると、先端の高さが高い凸部ほど早く摩耗する。このため、トナー粒子担持ローラの表面において摩耗のばらつきが発生することにより、トナー粒子の搬送性、及び帯電性にばらつきが生じると、トナー粒子が現像装置から漏れて画像形成装置内に飛散したり、画像にかぶりが生じる畏れがあるという課題があった。   In such a developing device, since the unevenness of the surface of the toner particle carrying roller is formed by sandblasting, the size, depth, shape, and arrangement of the recesses are not uniform. Further, the concave portion on the surface has a curved surface because it is dug by substantially spherical particles, and the tip of the convex portion is pointed. Since the height of the tip of the convex portion is also non-uniform, when the carried toner particles are pressed by the layer thickness regulating member, the convex portion with a higher tip height wears faster. For this reason, if variations in toner particle transportability and charging properties occur due to variations in wear on the surface of the toner particle carrying roller, the toner particles may leak from the developing device and scatter in the image forming apparatus. There is a problem that the image has fogging.

本発明は、かかる課題に鑑みてなされたものであり、その目的とするところは、トナー粒子を良好に帯電させることが可能なトナー粒子担持ローラを有する現像装置、そのトナー粒子担持ローラ、前記現像装置を有する画像形成装置、画像形成システム、及び、トナー粒子担持ローラの製造方法を実現することである。   The present invention has been made in view of such problems, and an object of the present invention is to provide a developing device having a toner particle carrying roller capable of satisfactorily charging toner particles, the toner particle carrying roller, and the development described above. An image forming apparatus having the apparatus, an image forming system, and a method for manufacturing a toner particle carrying roller.

主たる本発明は、像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、を有し、前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、格子は、軸方向において複数種類のピッチで形成可能であり、前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とする現像装置である。 The main aspect of the present invention is to provide a container for containing toner particles for developing a latent image carried on an image carrier, and a concavo-convex portion on the surface for carrying the toner particles. A toner particle-carrying roller whose top surface of the convex portion arranged on the sandwich is positioned at a certain distance from the axis, and the latent image is a dot-like latent image formed in a lattice-shaped region And the lattice can be formed with a plurality of types of pitches in the axial direction, and the pitch of the recesses in the axial direction is shorter than the longest pitch among the plurality of types of pitches in the lattice. Device.

本発明の他の特徴については、本明細書及び添付図面の記載により明らかにする。 Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

本明細書及び添付図面の記載により少なくとも次のことが明らかにされる。 At least the following will be made clear by the description of the present specification and the accompanying drawings.

像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、を有することを特徴とする現像装置である。
このような現像装置によれば、トナー粒子担持ローラの表面の凸部は、凹部を挟んで配置される凸部の頂面同士が軸心から一定の距離に位置するので、各凸部の頂面は、ローラの単一半径の周面に位置することになる。 According to such a developing apparatus, the convex portions on the surface of the toner particle-supporting roller are located at a constant distance from the axial center of the convex portions arranged with the concave portions sandwiched between them. The surface will be located on the peripheral surface of the roller with a single radius. このため、例えば、担持されたトナー粒子の層厚を規制すべく、平坦な面を有する部材をトナー粒子担持ローラ側に押圧した際には、各凸部の頂面に担持されたトナー粒子が同様に押圧されるため、トナー粒子担持ローラに担持されるトナー粒子の層厚を、トナー粒子担持ローラの全域に亘ってほぼ均一にすることが可能である。 Therefore, for example, when a member having a flat surface is pressed toward the toner particle supporting roller side in order to regulate the layer thickness of the supported toner particles, the toner particles supported on the top surface of each convex portion are pressed. Since it is pressed in the same manner, it is possible to make the layer thickness of the toner particles carried on the toner particle carrying roller substantially uniform over the entire area of ​​the toner particle carrying roller. また、担持されたトナー粒子が同様に押圧されるので、トナー粒子をほぼ均一に帯電させることが可能である。 Further, since the supported toner particles are pressed in the same manner, it is possible to charge the toner particles substantially uniformly. An accommodation portion for accommodating toner particles for developing a latent image carried on an image carrier, and a concave and convex portion on a surface for carrying the toner particles, with the concave portion of the concave and convex portion interposed therebetween. And a toner particle carrying roller having a top surface of the convex portion positioned at a certain distance from the axis. An accommodation portion for accommodating toner particles for developing a latent image carried on an image carrier, and a concave and convex portion on a surface for carrying the toner particles, with the concave portion of the concave and convex portion involved similarly. And a toner particle carrying roller having a top surface of the convex portion positioned at a certain distance from the axis.
According to such a developing device, since the convex portions on the surface of the toner particle carrying roller are located at a fixed distance from the axial center of the convex portions arranged with the concave portions interposed therebetween, The surface will be located on a single radius peripheral surface of the roller. Therefore, for example, when a member having a flat surface is pressed toward the toner particle carrying roller in order to regulate the layer thickness of the carried toner particles, the toner particles carried on the top surface of each convex portion are Since it is pressed in the same manner, the layer thickness of the toner particles carried on the toner particle carrying roller can be made substantially uniform over the entire area of the toner particle carrying roller. Further, since the carried toner particles are pressed in the same manner, the toner particles can be charged almost uniformly. According to such a developing device, since the convex portions on the surface of the toner particle carrying roller are located at a fixed distance from the axial center of the convex portions arranged with the concave portions recessively, The surface will be located on a single radius peripheral surface of the roller. Therefore, for example, when a member having a flat surface is pressed toward the toner particle carrying roller in order to regulate the layer thickness of the carried toner particles, the toner particles carried on the top surface of each convex portion are Since it is pressed in the same manner, the layer thickness of the toner particles carried on the toner particle carrying roller can be made substantially uniform over the entire area of ​​the toner particle carrying roller. Further, since the carried toner particles are pressed in the same manner, the toner particles can be charged almost uniformly.

かかる現像装置において、前記凹部は、軸方向に等ピッチに配置されて螺旋状に形成されていることが望ましい。
トナー粒子担持ローラは、表面にてトナー粒子を担持して像担持体の潜像を現像する。 The toner particle-supporting roller supports the toner particles on the surface to develop a latent image of the image carrier. このとき、トナー粒子担持ローラの表面に形状、深さ等が不均一な凹凸が形成されていると担持されたトナー粒子のうち深い凹部に入り込んだトナー粒子は転動されにくく帯電されにくい。 At this time, if unevenness having a non-uniform shape, depth, etc. is formed on the surface of the toner particle-supporting roller, the toner particles that have entered the deep recesses among the supported toner particles are less likely to be rolled and charged. また、軸方向に所定の間隔を隔てて周方向に沿った溝状の凹部が形成されている場合には、溝状の凹部と対向する像担持体の軸方向における位置が変化しないため、現像されたトナー像は凹部と対向していた部位のみが濃度が高くなる畏れがある。 Further, when the groove-shaped recesses along the circumferential direction are formed at predetermined intervals in the axial direction, the position of the image carrier facing the groove-shaped recesses in the axial direction does not change, so that the development is performed. There is a fear that the density of the toner image will be high only in the portion facing the concave portion. 一方、軸方向に沿って溝状の凹部が形成されている場合には、トナー粒子担持ローラの回転方向と溝状の凹部との向きがほぼ直交するので、担持されたトナー粒子は転動されにくく帯電されにくい。 On the other hand, when the groove-shaped recess is formed along the axial direction, the rotation direction of the toner particle-supporting roller and the direction of the groove-shaped recess are substantially orthogonal to each other, so that the supported toner particles are rolled. Hard to be charged. 上記のような現像装置によれば、トナー粒子担持ローラの表面に、軸方向及び周方向に対し傾斜を有し軸方向に等ピッチに螺旋状の凹部が形成されているので、トナー粒子担持ローラの回転に伴ってトナー粒子を転動させつつ移動させるためトナー粒子をより良好に帯電させることが可能である。 According to the above-mentioned developing apparatus, the surface of the toner particle-bearing roller is formed with spiral recesses having an inclination in the axial direction and the circumferential direction and at equal pitches in the axial direction. Since the toner particles are moved while being rolled with the rotation of the toner particles, it is possible to charge the toner particles better. また、トナー粒子担持ローラの回転に伴って像担持体と凹部とが対向する位置が軸方向及び周方向に順次変化していくので、現像されたトナー像に濃度ムラが生じることを抑えることが可能である。 Further, since the positions where the image carrier and the recess face each other are sequentially changed in the axial direction and the circumferential direction with the rotation of the toner particle carrying roller, it is possible to suppress the occurrence of density unevenness in the developed toner image. It is possible. In such a developing device, it is desirable that the concave portions are arranged in an axial direction at an equal pitch and formed in a spiral shape. In such a developing device, it is desirable that the concave portions are arranged in an axial direction at an equal pitch and formed in a spiral shape.
The toner particle carrying roller carries toner particles on its surface and develops the latent image on the image carrier. At this time, if irregularities having non-uniform shapes, depths, etc. are formed on the surface of the toner particle carrying roller, the toner particles that have entered the deep depression among the carried toner particles are difficult to roll and are not easily charged. In addition, when groove-like recesses are formed along the circumferential direction with a predetermined interval in the axial direction, the position in the axial direction of the image carrier facing the groove-like recesses does not change. In the toner image thus formed, there is a possibility that the density is increased only in the portion facing the concave portion. On the other hand, when the groove-shaped recess is formed along the axial direction, the direction of rotation of the toner particle-carrying roller and the direction of the groove-shaped recess are almost orthogona The toner particle carrying roller carries toner particles on its surface and develops the latent image on the image carrier. At this time, if irregularities having non-uniform shapes, depths, etc. are formed on the surface of the toner particle carrying roller, the toner particles that have entered the deep depression among the carried toner particles are difficult to roll and are not easily charged. In addition, when groove-like recesses are formed along the generating direction with a predetermined interval in the axial direction, the position in the Aaxial direction of the image carrier facing the groove-like recesses does not change. In the toner image thus formed, there is a possibility that the density is increased only in the portion facing the concave portion. On the other hand, when the groove- shaped recess is formed along the axial direction, the direction of rotation of the toner particle-carrying roller and the direction of the groove-shaped recess are almost orthogona l, so the carried toner particles are rolled. Hard to be charged. According to the developing device as described above, the toner particle carrying roller has the concave portions formed on the surface of the toner particle carrying roller at an equal pitch in the axial direction and inclined with respect to the axial direction and the circumferential direction. Since the toner particles are moved while rolling with the rotation of the toner particles, it is possible to charge the toner particles better. In addition, since the position where the image carrier and the concave portion face each other changes in the axial direction and the circumferential direction as the toner particle carrying roller rotates, it is possible to suppress the occurrence of density unevenness in the developed toner image. Is possible. l, so the carried toner particles are rolled. Hard to be charged. According to the developing device as described above, the toner particle carrying roller has the concave portions formed on the surface of the toner particle carrying roller at an equal pitch in the axial In addition, since the position where the image carrier. Since the toner particles are moved while rolling with the rotation of the toner particles, it is possible to charge the toner particles better. In addition, since the position where the image carrier and the concave portion face each other changes in the axial direction and the transmitting direction as the toner particle carrying roller rotates, it is possible to suppress the occurrence of density unevenness in the developed toner image. Is possible.

かかる現像装置において、前記凹部は、軸方向及び周方向に対し傾斜角度を異ならせて2種類形成されていることが望ましい。
このような現像装置によれば、トナー粒子担持ローラには、傾斜の角度が異なる2種類の凹部が形成されているので、トナー粒子は、凹部に沿って2種類の方向に移動されることになる。このため、トナー粒子が所定の一方向のみに移動して偏ることを防止することが可能である。
In such a developing device, it is desirable that the concave portions are formed in two types with different inclination angles with respect to the axial direction and the circumferential direction.
According to such a developing device, since the toner particle carrying roller has two types of recesses having different inclination angles, the toner particles are moved in two types along the recess. Become. For this reason, it is possible to prevent the toner particles from moving and being biased in only one predetermined direction. According to such a developing device, since the toner particle carrying roller has two types of recesses having different approach angles, the toner particles are moved in two types along the recess. Become. For this reason, it is possible to prevent the toner particles from moving and being biased in only one predetermined direction.

かかる現像装置において、前記凹凸部における凸部の頂面から凹部の底面までの距離は一定であることが望ましい。
このような現像装置によれば、凹凸部における凸部の頂面から凹部の底面までの距離が一定なので、トナー粒子の量は凹部の全域においてほぼ均一に入り込むことになる。 According to such a developing device, since the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave-convex portion is constant, the amount of toner particles penetrates substantially uniformly over the entire concave portion. このため、トナー粒子担持ローラに担持されるトナー粒子の量を、トナー粒子担持ローラの全域においてほぼ均一にすることが可能である。 Therefore, the amount of toner particles supported on the toner particle-supporting roller can be made substantially uniform over the entire area of ​​the toner particle-supporting roller. In such a developing device, it is desirable that the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concavo-convex portion is constant. In such a developing device, it is desirable that the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concavo-convex portion is constant.
According to such a developing device, since the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave and convex portion is constant, the amount of toner particles enters substantially uniformly throughout the concave portion. For this reason, the amount of toner particles carried on the toner particle carrying roller can be made substantially uniform over the entire area of the toner particle carrying roller. According to such a developing device, since the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave and convex portion is constant, the amount of toner particles enters substantially uniformly throughout the concave portion. For this reason, the amount of toner particles carried on the toner particle carrying roller can be made substantially uniform over the entire area of ​​the toner particle carrying roller.

かかる現像装置において、前記凹部の深さは、前記トナー粒子の体積平均粒径の2倍以下であることが望ましい。
このような現像装置によれば、凹部の深さは、トナー粒子の体積平均粒径の2倍以下なので、凹部に入り込んだトナー粒子は凹部内において、深さ方向に2つ以上重なることはない。 According to such a developing device, the depth of the recess is not more than twice the volume average particle diameter of the toner particles, so that the toner particles that have entered the recess do not overlap more than one in the depth direction. .. このため、凹部内のトナー粒子をムラなく転動させて良好に帯電させることが可能である。 Therefore, it is possible to roll the toner particles in the recess evenly and charge them satisfactorily. In such a developing device, it is desirable that the depth of the recess is not more than twice the volume average particle diameter of the toner particles. In such a developing device, it is desirable that the depth of the recess is not more than twice the volume average particle diameter of the toner particles.
According to such a developing device, since the depth of the recess is not more than twice the volume average particle diameter of the toner particles, two or more toner particles entering the recess do not overlap in the depth direction in the recess. . For this reason, it is possible to charge the toner particles in the recesses uniformly by rolling them uniformly. According to such a developing device, since the depth of the recess is not more than twice the volume average particle diameter of the toner particles, two or more toner particles entering the recess do not overlap in the depth direction in the recess. reason, it is possible to charge the toner particles in the recesses uniformly by rolling them uniformly.

かかる現像装置において、前記2種類の前記凹部は、互いに交差して格子状をなしていることが望ましい。
このような現像装置によれば、2種類の凹部が交差しているので、一旦は一方の凹部に沿って転動し始めたトナー粒子が、途中から他方の凹部に沿って転動することが可能である。このため、トナー粒子の移動方向が偏ることを、より効果的に抑えることが可能である。
In such a developing device, it is desirable that the two types of concave portions intersect with each other to form a lattice shape.
According to such a developing device, since the two types of concave portions intersect, the toner particles that have started rolling along one concave portion may roll along the other concave portion from the middle. Is possible. For this reason, it is possible to more effectively suppress the deviation of the moving direction of the toner particles. According to such a developing device, since the two types of concave portions intersect, the toner particles that have started rolling along one concave portion may roll along the other concave portion from the middle. Is possible. For this reason, it is possible to more Effectively suppress the deviation of the moving direction of the toner particles.

かかる現像装置において、前記凹部に囲まれた凸部の頂面が菱形であることが望ましい。
このような現像装置によれば、頂面が菱形であるため2種類の凹部にて転動しているトナー粒子は、各々ほぼ同じ距離だけ転動すると他方の凹部と交差する位置に到達する。 According to such a developing device, since the top surface is rhombic, the toner particles rolling in the two types of recesses reach a position where they intersect with the other recesses when they are rolled by approximately the same distance. このため、いずれの凹部に沿って転動したトナー粒子をほぼ同様に転動させほぼ同様に帯電させることが可能である。 Therefore, it is possible to roll the toner particles that have rolled along any of the recesses in the same manner and charge the toner particles in the same manner. In such a developing device, it is desirable that the top surface of the convex portion surrounded by the concave portion is a rhombus. In such a developing device, it is desirable that the top surface of the convex portion surrounded by the concave portion is a rhombus.
According to such a developing device, since the top surface has a rhombus shape, the toner particles rolling in the two types of recesses reach a position intersecting with the other recess when each of them rolls by substantially the same distance. For this reason, it is possible to cause the toner particles that have rolled along any of the recesses to roll in substantially the same manner and be charged in substantially the same manner. According to such a developing device, since the top surface has a rhombus shape, the toner particles rolling in the two types of recesses reach a position intersecting with the other recess when each of them rolls by substantially the same distance. For this reason, it is possible to cause the toner particles that have rolled along any of the rhombus to roll in substantially the same manner and be charged in substantially the same manner.

かかる現像装置において、各々の前記菱形の前記凸部の頂面が有する2本の対角線の一方が周方向に沿うように、前記2種類の前記凹部が形成されていることが望ましい。
このような現像装置によれば、各々の前記菱形が有する2本の対角線の一方が周方向に沿うように凹部が形成されているので、周方向に沿わされた対角線の一方の頂角からは、2種類の凹部が軸方向における相反する方向に向かい同角度の傾斜をもって形成されていることになる。 According to such a developing apparatus, since a recess is formed so that one of the two diagonal lines of each rhombus is along the circumferential direction, from one apex angle of the diagonal line along the circumferential direction. The two types of recesses are formed with inclinations of the same angle toward opposite directions in the axial direction. このため、2種類の凹部に沿って移動されるトナー粒子は、軸方向の両端側にほぼ同様に移動される。 Therefore, the toner particles that are moved along the two types of recesses are moved to both end sides in the axial direction in substantially the same manner. よって、トナー粒子をムラなく移動させることが可能である。 Therefore, it is possible to move the toner particles evenly. In the developing device, it is preferable that the two types of the concave portions are formed so that one of two diagonals of the top surface of the convex portion of each rhombus is along the circumferential direction. In the developing device, it is preferred that the two types of the concave portions are formed so that one of two diagonals of the top surface of the convex portion of each rhombus is along the sintered direction.
According to such a developing device, since the concave portion is formed so that one of the two diagonal lines of each rhombus is along the circumferential direction, from one apex angle of the diagonal line along the circumferential direction, The two types of recesses are formed in the opposite directions in the axial direction and inclined at the same angle. For this reason, the toner particles moved along the two types of recesses are moved substantially in the same manner toward both ends in the axial direction. Therefore, it is possible to move the toner particles without unevenness. According to such a developing device, since the concave portion is formed so that one of the two diagonal lines of each rhombus is along the originating direction, from one apex angle of the diagonal line along the similarly direction, The two types of recesses are formed In the opposite directions in the axial direction and inclined at the same angle. For this reason, the toner particles moved along the two types of rhombuses are moved substantially in the same manner toward both ends in the axial direction. Therefore, it is possible to move the toner particles without unevenness.

かかる現像装置において、前記凸は、前記2本の対角線のうち長い方の対角線が周方向に沿わされていることが望ましい。
このような現像装置によれば、頂面が菱形の凸部は周方向に沿って位置する2つの頂角が鋭角になり、軸方向に沿って位置する2つの頂角が鈍角となる。 According to such a developing apparatus, the convex portion having a diamond-shaped apex has two apex angles located along the circumferential direction as acute angles and two apex angles located along the axial direction as obtuse angles. このため、トナー粒子が周方向に向かってより移動し易い構成とすることが可能である。 Therefore, it is possible to configure the toner particles so that they can move more easily in the circumferential direction. In the developing device, it is preferable that the convex has a longer diagonal line along the circumferential direction of the two diagonal lines. In the developing device, it is preferred that the convex has a longer diagonal line along the originating direction of the two diagonal lines.
According to such a developing device, in the convex portion having a rhombic top surface, two apex angles positioned along the circumferential direction are acute angles, and two apex angles positioned along the axial direction are obtuse angles. For this reason, the toner particles can be configured to move more easily in the circumferential direction. According to such a developing device, in the convex portion having a rhombic top surface, two apex angles positioned along the projected direction are acute angles, and two apex angles positioned along the axial direction are obtuse angles. For this reason, the toner particles can be configured to move more easily in the proceeding direction.

かかる現像装置において、前記凹部に囲まれた凸部の頂面が正方形状であることとしてもよい。
このような現像装置によれば、2種類の凹部に囲まれた凸部の頂面が正方形なので、凸部は周方向に沿って位置する2つの頂角、及び、軸方向に沿って位置する2つの頂角がいずれも直角となり、2種類の凹部は周方向に対して同角度の傾斜を有することになる。このため、トナー粒子が周方向及び軸方向に向かって同様に移動し易い構成とすることが可能である。このため、トナー粒子をより均一に転動させて均一に帯電させることが可能である。
In such a developing device, the top surface of the convex portion surrounded by the concave portion may be square.
According to such a developing device, since the top surface of the convex portion surrounded by the two types of concave portions is square, the convex portion is positioned along two apex angles positioned along the circumferential direction and along the axial direction. The two apex angles are right angles, and the two types of recesses have the same inclination with respect to the circumferential direction. For this reason, the toner particles can be easily moved in the circumferential direction and the axial direction as well. For this reason, it is possible to uniformly charge the toner particles by rolling them more uniformly. According to such a developing device, since the top surface of the convex portion surrounded by the two types of concave portions is square, the convex portion is positioned along two apex angles positioned along the sintered direction and along the axial direction. The two apex angles For this reason, the toner particles can be easily moved in the generating direction and the axial direction as well. For this reason, it is possible. Are right angles, and the two types of recesses have the same approach with respect to the projected direction. to uniformly charge the toner particles by rolling them more uniformly.

かかる現像装置において、前記凸部は、前記トナー粒子を担持するための表面を有することが望ましい。
このような現像装置によれば、凸部はトナー粒子を担持するための表面を有するので、トナー粒子担持ローラは、凹部と凸部とのいずれにおいてもトナー粒子を担持する。 According to such a developing device, since the convex portion has a surface for supporting the toner particles, the toner particle supporting roller supports the toner particles in both the concave portion and the convex portion. このため、トナー粒子担持ローラの表面を像担持体と対向させることにより、像担持体のトナー粒子担持ローラの表面と対向する部分全体にて、濃度ムラを抑えて潜像を現像することが可能である。 Therefore, by making the surface of the toner particle-supporting roller face the image carrier, it is possible to develop a latent image while suppressing density unevenness in the entire portion of the image carrier facing the surface of the toner particle-supporting roller. Is. In the developing device, it is preferable that the convex portion has a surface for supporting the toner particles. In the developing device, it is preferred that the convex portion has a surface for supporting the toner particles.
According to such a developing device, since the convex portion has a surface for carrying toner particles, the toner particle carrying roller carries toner particles in both the concave portion and the convex portion. Therefore, by making the surface of the toner particle carrying roller face the image carrier, it is possible to develop the latent image while suppressing density unevenness in the entire portion of the image carrier facing the surface of the toner particle carrying roller. It is. According to such a developing device, since the convex portion has a surface for carrying toner particles, the toner particle carrying roller carries toner particles in both the concave portion and the convex portion. Therefore, by making the surface of the toner particle carrying roller face The image carrier, it is possible to develop the latent image while suppressing density unevenness in the entire portion of the image carrier facing the surface of the toner particle carrying roller. It is.

かかる現像装置において、前記トナー粒子担持ローラに担持された前記トナー粒子の層厚を規制するための層厚規制部材を有し、前記表面に担持された前記トナー粒子は、前記層厚規制部材が有する平面により押圧されて、層厚が規制されることが望ましい。
このような現像装置によれば、トナー粒子担持ローラの表面に担持されたトナー粒子は、層厚規制部材が有する平面にて、その層厚が規制されるので、トナー粒子担持ローラの表面、特に凸部に担持されたトナー粒子が層厚規制部材によって掻き取られることはない。 According to such a developing device, the layer thickness of the toner particles supported on the surface of the toner particle-supporting roller is regulated by the flat surface of the layer thickness-regulating member, so that the surface of the toner particle-supporting roller, particularly The toner particles supported on the convex portion are not scraped off by the layer thickness regulating member. すなわち、トナー粒子担持ローラの凹部にも、凸部にもトナー粒子を担持させた状態にてトナー粒子の層厚を規制することが可能である。 That is, it is possible to regulate the layer thickness of the toner particles in a state where the toner particles are supported on both the concave portion and the convex portion of the toner particle supporting roller. また、表面に担持されたトナー粒子は、層厚規制部材が有する平面により押圧されているので、トナー粒子担持ローラの表面、層厚規制部材、及び、トナー粒子同士のいずれかとトナー粒子とを互いに摩擦させることにより良好に帯電させることが可能である。 Further, since the toner particles supported on the surface are pressed by the flat surface of the layer thickness regulating member, the surface of the toner particle supporting roller, the layer thickness regulating member, and any one of the toner particles and the toner particles are mutually exchanged. It is possible to charge the particles well by rubbing them. In the developing device, the toner particle carrying roller has a layer thickness regulating member for regulating a layer thickness of the toner particle, and the toner particle carried on the surface is formed by the layer thickness regulating member. It is desirable that the layer thickness be regulated by being pressed by the flat surface. In the developing device, the toner particle carrying roller has a layer thickness regulating member for regulating a layer thickness of the toner particle, and the toner particle carried on the surface is formed by the layer thickness regulating member. It is desirable that the layer thickness. be regulated by being pressed by the flat surface.
According to such a developing device, the toner particles carried on the surface of the toner particle carrying roller are regulated in the layer thickness by the plane of the layer thickness regulating member, so that the surface of the toner particle carrying roller, in particular, The toner particles carried on the convex portions are not scraped off by the layer thickness regulating member. That is, it is possible to regulate the layer thickness of the toner particles in a state where the toner particles are supported on the concave portion and the convex portion of the toner particle supporting roller. Further, since the toner particles carried on the surface are pressed by the flat surface of the layer thickness regulating member, any one of the surface of the toner particle carrying roller, the layer thickness regulating member, and the toner particles and the toner particles are mutually connected. It is possible to charge well by rubbing. According to such a developing device, the toner particles carried on the surface of the toner particle carrying roller are regulated in the layer thickness by the plane of the layer thickness regulating member, so that the surface of the toner particle carrying roller, in particular, The toner particles carried on the convex portions are not scraped off by the layer thickness regulating member. That is, it is possible to regulate the layer thickness of the toner particles in a state where the toner particles are supported on the concave portion and the convex further, since the toner particles carried on the surface are pressed by the flat surface of the layer thickness regulating member, any one of the surface of the toner particle carrying roller, the layer thickness regulating member, and The toner particles and the toner particles are mutually connected. It is possible to charge well by rubbing.

かかる現像装置において、前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、格子は、前記軸方向において複数種類のピッチで形成可能であり、前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことが望ましい。
トナー粒子担持ローラの表面においては、凹部と凹部以外の所では、凹部の方がトナー粒子の担持量が多い。 On the surface of the toner particle-carrying roller, the amount of toner particles supported is larger in the recesses except for the recesses and the recesses. このため、潜像を現像した際には、凹部と対向した部位の濃度が僅かに高くなる畏れがある。 Therefore, when the latent image is developed, there is a fear that the density of the portion facing the concave portion becomes slightly high. そして、格子における複数種類のピッチのうち最長ピッチより、凹部の軸方向におけるピッチの方が大きい場合には、格子状に区画された領域に形成されたドット状潜像を現像した際に、トナー粒子担持ローラの凹部を含む部分にて形成されるドットと、凹部を含まない部分にて形成されるドットとが生じてしまう。 When the pitch in the axial direction of the recess is larger than the longest pitch among the plurality of types of pitches in the lattice, the toner is formed when the dot-shaped latent image formed in the region partitioned in the lattice is developed. Dots formed in the portion of the particle-carrying roller including the recesses and dots formed in the portion not including the recesses are generated. この場合には、潜像が現像されたトナー像に周期的な濃度ムラが発生する。 In this case, periodic density unevenness occurs in the toner image in which the latent image is developed. ところが、上記のような現像装置によれば、各ドット状潜像を現像したドットのいずれも、トナー粒子担持ローラの凹部を含む部分にて形成されることになる。 However, according to the developing apparatus as described above, each of the dots developed by developing each dot-shaped latent image is formed at a portion including the recess of the toner particle-supporting roller. このため、現像されたトナー像に凹部による濃度ムラが発生することを抑えることが可能である。 Therefore, it is possible to suppress the occurrence of density unevenness due to the recesses in the developed toner image. In such a developing device, the latent image has a dot-like latent image formed in a region partitioned in a lattice shape, and the lattice can be formed at a plurality of pitches in the axial direction, The pitch in the axial direction is preferably shorter than the longest pitch among a plurality of types of pitches in the lattice. In such a developing device, the latent image has a dot-like latent image formed in a region partitioned in a lattice shape, and the lattice can be formed at a plurality of pitches in the axial direction, The pitch in the axial direction is preferably shorter than the longest pitch among a plurality of types of pitches in the lattice.
On the surface of the toner particle carrying roller, the amount of toner particles carried is larger in the recesses than in the recesses. For this reason, when the latent image is developed, there is a possibility that the density of the portion facing the recess is slightly increased. When the pitch in the axial direction of the concave portion is larger than the longest pitch among the plurality of types of pitches in the lattice, the toner is generated when the dot-like latent image formed in the region partitioned in the lattice shape is developed. Dots formed at a portion including the concave portion of the particle carrying roller and dots formed at a portion not including the concave portion are generated. In this case, periodic density unevenness occurs in the toner image in which the latent image is developed. However, according to the developing device as described above, any dot obtained by developing each dot-like latent image is formed at a portion including the concave On the surface of the toner particle carrying roller, the amount of toner particles carried is larger in the recesses than in the recesses. For this reason, when the latent image is developed, there is a possibility that the density of the portion facing the recess. is slightly increased. When the pitch in the axial direction of the concave portion is larger than the longest pitch among the plurality of types of pitches in the lattice, the toner is generated when the dot-like latent image formed in the region partitioned in the lattice shape is developed. Dots formed at a portion including the concave portion of the particle carrying roller and dots formed at a portion not including the concave portion are generated. In this case, periodic density unevenness occurs in the toner image in which the latent image is developed. However, according to the developing device as described above, any dot obtained by developing each dot-like latent image is formed at a portion including the concave portion of the toner particle carrying roller. For this reason, it is possible to suppress the occurrence of density unevenness due to the concave portion in the developed toner image. portion of the toner particle carrying roller. For this reason, it is possible to suppress the occurrence of density unevenness due to the concave portion in the developed toner image.

また、像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、を有し、前記凹部は、軸方向に等ピッチに配置されて螺旋状に形成され、前記凹部は、軸方向及び周方向に対し傾斜角度を異ならせて2種類形成され、前記凹凸部における凸部の頂面から凹部の底面までの距離は、前記トナー粒子の体積平均粒径の2倍以下であり、前記2種類の前記凹部は、互いに交差して格子状をなし、前記凹部に囲まれた凸部の頂面が正方形状であり、前記凸部は、前記トナー粒子を担持するための表面を有し、前記トナー粒子担持ローラに担持された前記トナー粒子の層厚を規制するための層厚規制部材を有し、前記表面に担持された前記トナー粒子は、前記層厚規制部材が有する平面により押圧されて、層厚が規制され、前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、格子は、前記軸方向において複数種類のピッチで形成可能であり、前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とする現像装置である。
このような現像装置によれば、既述のすべての効果を奏するため、本発明の目的が最も有効に達成される。 According to such a developing device, all the effects described above are exhibited, so that the object of the present invention is most effectively achieved. In addition, a storage portion for storing toner particles for developing a latent image carried on the image carrier, and a concave and convex portion on the surface for carrying the toner particles, with the concave portion of the concave and convex portion interposed therebetween. A toner particle carrying roller whose top surface is positioned at a certain distance from the axis, and the recesses are arranged at equal pitches in the axial direction and formed in a spiral shape, Two types are formed with different inclination angles with respect to the axial direction and the circumferential direction, and the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave and convex portion is not more than twice the volume average particle size of the toner particles. The two types of concave portions intersect with each other to form a lattice shape, and the top surface of the convex portion surrounded by the concave portions has a In addition, a storage portion for storing toner particles for developing a latent image carried on the image carrier, and a concave and convex portion on the surface for carrying the toner particles, with the concave portion of the concave and convex portion involved similarly. toner particle carrying roller whose top surface is positioned at a certain distance from the axis, and the recesses are arranged at equal pitches in the axial direction and formed in a spiral shape, Two types are formed with different proximity angles with respect to the axial direction The two types of concave. And the sintered direction, and the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave and convex portion is not more than twice the volume average particle size of the toner particles. portions intersect with each other to form a lattice shape, and the top surface of the convex portions surrounded by the concave portions has a square shape, and the convex portion has a surface for supporting the toner particles. And having the toner particles carried on the toner particle carrying roller A layer thickness regulating member for regulating the thickness; the toner particles carried on the surface are pressed by a plane of the layer thickness regulating member to regulate the layer thickness; A plurality of types of pitches in the axial direction, and a plurality of pitches of the recesses in the axial direction. The developing device is characterized by being shorter than the longest pitch among the types of pitches. And having the toner particles carried on the toner particle carrying roller A layer thickness regulating member for regulating the thickness; the toner particles carried on the surface are pressed by a plane Of the layer thickness regulating member to regulate the layer thickness; A plurality of types of pitches in the axial direction, and a plurality of pitches of the recesses in the axial direction. The developing device is characterized by being shorter than the longest pitch among the types of pitches.
According to such a developing device, all of the above-described effects can be obtained, so that the object of the present invention can be achieved most effectively. According to such a developing device, all of the above-described effects can be obtained, so that the object of the present invention can be achieved most effectively.

また、像担持体に担持された潜像を現像するためのトナー粒子を担持するための表面に、凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置することを特徴とするトナー粒子担持ローラも実現可能である。 Further, the surface for carrying the toner particles for developing the latent image carried on the image carrier has a concavo-convex part, and the top surface of the convex part arranged with the concave part of the concavo-convex part is the axis It is also possible to realize a toner particle carrying roller that is located at a certain distance from the center.

また、像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、を有する現像装置を用いて画像を形成することを特徴とする画像形成装置も実現可能である。   In addition, a storage portion for storing toner particles for developing a latent image carried on the image carrier, and a concave and convex portion on the surface for carrying the toner particles, with the concave portion of the concave and convex portion interposed therebetween. It is also possible to realize an image forming apparatus that forms an image using a developing device having a toner particle carrying roller in which the top surface of the convex portion is positioned at a certain distance from the axis.

また、コンピュータ、及び、前記コンピュータに接続され、像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、を有する現像装置を用いて画像を形成する画像形成装置、を有することを特徴とする画像形成システムも実現可能である。   And a computer, a storage unit that is connected to the computer and stores toner particles for developing a latent image carried on the image carrier, and a concavo-convex part on the surface for carrying the toner particles. An image forming apparatus that forms an image using a developing device having a toner particle carrying roller in which a top surface of the convex portion disposed across the concave portion of the concave and convex portion is located at a certain distance from the axis. An image forming system characterized by this can also be realized.

また、円筒形状の円筒部材の両端部に軸を有するフランジを取り付けるステップと、前記フランジが取り付けられた前記円筒部材を、軸を中心として回転させつつ、前記円筒部材の表面を前記軸と同心状になるように切削するステップと、互いに平行に配置され、互いに異なる2種類の螺旋状の溝を形成するための2つのダイスを回転させ、切削された前記円筒部材を回転させつつ前記2つのダイス間をそれら軸方向に沿って軸方向に移動させて、前記円筒部材の表面に前記ダイスが押圧されることにより、前記円筒部材の表面に凹設される凹部と、前記ダイスに接触しない表面を有する凸部とを形成するステップと、を有することを特徴とするトナー粒子担持ローラの製造方法である。
このようなトナー粒子担持ローラの製造方法によれば、前記円筒部材の表面に凹設される凹部と、前記ダイスに接触しない表面を有する凸部とを有し、その表面にトナー粒子を担持することにより、担持されるトナー粒子の層厚をトナー粒子担持ローラの全域に亘ってほぼ均一にするとともに、トナー粒子をほぼ均一に帯電させることが可能なトナー粒子担持ローラを製造することが可能である。 According to such a method for manufacturing a toner particle carrying roller, it has a concave portion recessed on the surface of the cylindrical member and a convex portion having a surface that does not come into contact with the die, and the toner particles are supported on the surface. As a result, it is possible to manufacture a toner particle-supporting roller capable of making the layer thickness of the supported toner particles substantially uniform over the entire area of ​​the toner particle-supporting roller and charging the toner particles substantially uniformly. is there. A step of attaching flanges having shafts to both ends of a cylindrical cylindrical member; and the surface of the cylindrical member is concentric with the shaft while rotating the cylindrical member to which the flange is attached about the shaft. The two dies that are arranged parallel to each other and that form two different spiral grooves are rotated and the cut cylindrical member is rotated. The die is pressed against the surface of the cylindrical member by moving the gap in the axial direction along the axial direction between the concave portion provided in the surface of the cylindrical member and the surface not in contact with the die. And a step of forming a convex portion having the toner particle carrying roller. A step of attaching flanges having shafts to both ends of a cylindrical cylindrical member; and the surface of the cylindrical member is concentric with the shaft while rotating the cylindrical member to which the flange is attached about the shaft. The two dies that are arranged parallel The die is pressed against the surface of the cylindrical member by moving the gap in the axial direction along the axial direction between the concave portion provided in the to each other and that form two different spiral grooves are rotated and the cut cylindrical member is rotated. And a step of forming a convex portion having the toner particle carrying roller. And a step of forming a convex portion having the toner particle carrying roller.
According to such a method for manufacturing a toner particle carrying roller, a concave portion provided on the surface of the cylindrical member and a convex portion having a surface not in contact with the die are provided, and toner particles are carried on the surface. As a result, it is possible to manufacture a toner particle carrying roller capable of making the layer thickness of the toner particles carried almost uniform over the entire area of the toner particle carrying roller and charging the toner particles almost uniformly. is there. According to such a method for manufacturing a toner particle carrying roller, a concave portion provided on the surface of the cylindrical member and a convex portion having a surface not in contact with the die are provided, and toner particles are carried on the surface. a result, it is possible to manufacture a toner particle carrying roller capable of making the layer thickness of the toner particles carried almost uniform over the entire area of ​​the toner particle carrying roller and charging the toner particles almost uniformly. Is there.

===画像形成装置の概要===
図1、図2を用いて、本実施の形態に係る現像装置としての現像器を用いて画像を形成する画像形成装置としてレーザビームプリンタ(以下、プリンタともいう)10を例にとって、その構成例及び動作例について説明する。 A configuration example of a laser beam printer (hereinafter, also referred to as a printer) 10 as an image forming apparatus for forming an image using a developing device as a developing apparatus according to the present embodiment using FIGS. 1 and 2. And an operation example will be described. 図1は、プリンタ10を構成する主要構成要素を示した図であり、図2は、プリンタ10に備えられた制御ユニットの構成を説明するための図である。 FIG. 1 is a diagram showing main components constituting the printer 10, and FIG. 2 is a diagram for explaining a configuration of a control unit provided in the printer 10. なお、図1には、矢印にて上下方向を示しており、例えば、給紙トレイ92は、プリンタ10の下部に配置されており、定着ユニット90は、プリンタ10の上部に配置されている。 In FIG. 1, the vertical direction is indicated by an arrow. For example, the paper feed tray 92 is arranged at the lower part of the printer 10, and the fixing unit 90 is arranged at the upper part of the printer 10. === Overview of Image Forming Apparatus === === Overview of Image Forming Appliance ===
A configuration example of a laser beam printer (hereinafter also referred to as a printer) 10 as an example of an image forming apparatus that forms an image using a developing device as a developing apparatus according to the present embodiment, with reference to FIGS. An operation example will be described. FIG. 1 is a diagram showing main components constituting the printer 10, and FIG. 2 is a diagram for explaining a configuration of a control unit provided in the printer 10. In FIG. 1, the vertical direction is indicated by arrows. For example, the paper feed tray 92 is disposed at the lower part of the printer 10, and the fixing unit 90 is disposed at the upper part of the printer 10. A configuration example of a laser beam printer (hereinafter also referred to as a printer) 10 as an example of an image forming apparatus that forms an image using a developing device as a developing apparatus according to the present embodiment, with reference to FIGS. An operation example will be described. FIG. 1 is a diagram showing main components therefore the printer 10, and FIG. 2 is a diagram for explaining a configuration of a control unit provided in the printer 10. In FIG. 1, the vertical direction is indicated by arrows. For example, the paper feed tray 92 is disposed at the lower part of the printer 10, and the fixing unit 90 is disposed at the upper part of the printer 10.

<プリンタ10の構成>
プリンタ10は、図1に示すように、潜像を担持する像担持体の一例としての感光体20の回転方向に沿って、帯電ユニット30、露光ユニット40、現像器保持ユニット50、一次転写ユニット60、中間転写体70、クリーニングユニット75を有し、さらに、二次転写ユニット80、定着ユニット90、ユーザへの報知手段をなし液晶パネルでなる表示ユニット95、及び、これらのユニット等を制御しプリンタとしての動作を司る制御ユニット100を有している。 As shown in FIG. 1, the printer 10 includes a charging unit 30, an exposure unit 40, a developing device holding unit 50, and a primary transfer unit along the rotation direction of a photoconductor 20 as an example of an image carrier supporting a latent image. It has 60, an intermediate transfer body 70, and a cleaning unit 75, and further controls a secondary transfer unit 80, a fixing unit 90, a display unit 95 made of a liquid crystal panel without notifying the user, and these units. It has a control unit 100 that controls the operation as a printer. <Configuration of Printer 10> <Configuration of Printer 10>
As shown in FIG. 1, the printer 10 includes a charging unit 30, an exposure unit 40, a developing device holding unit 50, and a primary transfer unit along the rotation direction of a photoconductor 20 as an example of an image carrier that carries a latent image. 60, an intermediate transfer body 70, and a cleaning unit 75, and further controls a secondary transfer unit 80, a fixing unit 90, a display unit 95 formed of a liquid crystal panel as a means for notifying a user, and these units. It has a control unit 100 that controls the operation as a printer. As shown in FIG. 1, the printer 10 includes a charging unit 30, an exposure unit 40, a developing device holding unit 50, and a primary transfer unit along the rotation direction of a photoconductor 20 as an example of an image carrier that carries a latent image. 60, an intermediate transfer body 70, and a cleaning unit 75, and further controls a secondary transfer unit 80, a fixing unit 90, a display unit 95 formed of a liquid crystal panel as a means for notifying a user, and these units. It has a control unit 100 that controls the operation as a printer.

感光体20は、円筒状の導電性基材とその外周面に形成された感光層を有し、中心軸を中心に回転可能であり、本実施の形態においては、図1中の矢印で示すように時計回りに回転する。   The photoreceptor 20 has a cylindrical conductive substrate and a photosensitive layer formed on the outer peripheral surface thereof, and is rotatable around a central axis. In the present embodiment, the photoreceptor 20 is indicated by an arrow in FIG. Rotate clockwise.

帯電ユニット30は、感光体20を帯電するための装置であり、露光ユニット40は、レーザを照射することによって帯電された感光体20上に潜像を形成する装置である。この露光ユニット40は、光としてのレーザビームを射出するための半導体レーザ、多角形のポリゴンミラーを回転させるポリゴンミラーユニット、F−θレンズ等の複数種類のレンズ等を有しており、パーソナルコンピュータ、ワードプロセッサ等の不図示のホストコンピュータから入力された画像信号に基づいて、変調されたレーザビームを帯電された感光体20上に照射する。このとき半導体レーザから射出されたレーザビームは、ポリゴンミラーに照射される。ポリゴンミラーに照射されたレーザビームはポリゴンミラーの回転により反射角度を変更されつつレンズを通して感光体20上を走査する。そして、所定のタイミングにてレーザビームがON/OFFされて、所定の速度で回転する感光体20上の格子状に区画された領域にドット状潜像が形成される。そして、これらドット状潜像により潜像が構成される。ここで、ドット状潜像は、潜像を形成するものなので肉眼では見えない。   The charging unit 30 is a device for charging the photoconductor 20, and the exposure unit 40 is a device for forming a latent image on the photoconductor 20 charged by irradiating a laser. The exposure unit 40 includes a semiconductor laser for emitting a laser beam as light, a polygon mirror unit that rotates a polygonal polygon mirror, and a plurality of types of lenses such as an F-θ lens. Based on an image signal input from a host computer (not shown) such as a word processor, the modulated photoconductor 20 is irradiated with a modulated laser beam. At this time, the laser beam emitted from the semiconductor laser is applied to the polygon mirror. The laser beam applied to the polygon mirror scans the photoreceptor 20 through the lens while changing the reflection angle by the rotation of the polygon mirror. Then, the laser beam is turned on / off at a predetermined timing, and a dot-like latent image is formed in a grid-divided area on the photoreceptor 20 that rotates at a predetermined speed. These dot-like latent images constitute a latent image. Here, since the dot-like latent image forms a latent image, it cannot be seen with the naked eye.

現像器保持ユニット50は、感光体20上に形成された潜像を、現像装置の一例としての現像器51、52、53、54に収容されたトナー粒子(以下、トナーともいう)T、すなわち、ブラック現像器51に収容されたブラック(K)トナー、マゼンタ現像器52に収容されたマゼンタ(M)トナー、シアン現像器53に収容されたシアン(C)トナー及びイエロー現像器54に収容されたイエロー(Y)トナーを用いて現像するための装置である。   The developing device holding unit 50 converts the latent image formed on the photoreceptor 20 into toner particles (hereinafter also referred to as toner) T accommodated in developing devices 51, 52, 53, and 54 as an example of a developing device, that is, The black (K) toner contained in the black developing device 51, the magenta (M) toner contained in the magenta developing device 52, the cyan (C) toner contained in the cyan developing device 53, and the yellow developing device 54. This is an apparatus for developing using yellow (Y) toner.

この現像器保持ユニット50は、本実施の形態においては、回転することにより、前記4つの現像器51、52、53、54の位置を動かすことを可能としている。すなわち、この現像器保持ユニット50は、前記4つの現像器51、52、53、54を4つの着脱部50a、50b、50c、50dにより保持しており、前記4つの現像器51、52、53、54は、中心軸50eを中心として、それらの相対位置を維持したまま回転可能となっている。そして、感光体20が1回転する毎に、4つの現像器51、52、53、54のうちの1つを選択的に感光体20と対向させ、対向された現像器51、52、53、54に収容されているトナーにて、感光体20上に形成された潜像を順次現像する。なお、各現像器の詳細については、後述する。   In the present embodiment, the developing device holding unit 50 is capable of moving the positions of the four developing devices 51, 52, 53, and 54 by rotating. That is, the developing device holding unit 50 holds the four developing devices 51, 52, 53, and 54 by the four attaching / detaching portions 50a, 50b, 50c, and 50d, and the four developing devices 51, 52, and 53 are provided. , 54 can rotate around the central axis 50e while maintaining their relative positions. Each time the photosensitive member 20 rotates once, one of the four developing devices 51, 52, 53, 54 is selectively opposed to the photosensitive member 20, and the opposed developing devices 51, 52, 53, 54, The latent images formed on the photoreceptor 20 are sequentially developed with the toner contained in the toner 54. Details of each developing device will be described later.

一次転写ユニット60は、感光体20に形成された単色トナー像を中間転写体70に転写するための装置であり、4色のトナーが順次重ねて転写されると、中間転写体70にフルカラートナー像が形成される。この中間転写体70は、エンドレスのベルトであり、感光体20とほぼ同じ周速度にて回転駆動される。二次転写ユニット80は、中間転写体70上に形成された単色トナー像やフルカラートナー像を紙、フィルム、布等の記録媒体に転写するための装置である。   The primary transfer unit 60 is a device for transferring a single color toner image formed on the photoconductor 20 to the intermediate transfer body 70. When four color toners are sequentially transferred in a superimposed manner, the full color toner is transferred to the intermediate transfer body 70. An image is formed. The intermediate transfer member 70 is an endless belt, and is driven to rotate at substantially the same peripheral speed as the photosensitive member 20. The secondary transfer unit 80 is a device for transferring a single color toner image or a full color toner image formed on the intermediate transfer body 70 to a recording medium such as paper, film, or cloth.

定着ユニット90は、記録媒体上に転写された単色トナー像やフルカラートナー像を紙等の記録媒体に融着させて永久像とするための装置である。クリーニングユニット75は、一次転写ユニット60と帯電ユニット30との間に設けられ、感光体20の表面に当接されたゴム製のクリーニングブレード76を有し、一次転写ユニット60によって中間転写体70上にトナー像が転写された後に、感光体20上に残存するトナーTをクリーニングブレード76により掻き落として除去するための装置である。   The fixing unit 90 is a device for fusing a single color toner image or a full color toner image transferred onto a recording medium onto a recording medium such as paper to form a permanent image. The cleaning unit 75 is provided between the primary transfer unit 60 and the charging unit 30 and has a rubber cleaning blade 76 that is in contact with the surface of the photoconductor 20. The cleaning unit 75 is disposed on the intermediate transfer body 70 by the primary transfer unit 60. After the toner image is transferred, the toner T remaining on the photoconductor 20 is scraped off and removed by the cleaning blade 76.

制御ユニット100は、図2に示すようにメインコントローラ101と、ユニットコントローラ102とで構成され、メインコントローラ101には画像信号が入力され、この画像信号に基づく指令に応じてユニットコントローラ102が前記各ユニット等を制御して画像を形成する。
メインコントローラ101は、インターフェイス112を介してホストコンピュータと接続され、このホストコンピュータから入力された画像信号を記憶するための画像メモリ113及びプリンタ10全体の制御を司るCPU111等を備えている。
ユニットコントローラ102は、CPU120と、RAM、ROM等のメモリ116と、装置本体の各ユニット(帯電ユニット30、露光ユニット40、一次転写ユニット60、クリーニングユニット75、二次転写ユニット80、定着ユニット90、表示ユニット95)及び現像器保持ユニット50を駆動制御するための各駆動制御回路等を有し、メインコントローラ101から入力される信号に基づいて、各ユニットを制御する。 The unit controller 102 includes a CPU 120, a memory 116 such as a RAM and a ROM, and each unit of the main body of the apparatus (charging unit 30, exposure unit 40, primary transfer unit 60, cleaning unit 75, secondary transfer unit 80, fixing unit 90, It has each drive control circuit for driving and controlling the display unit 95) and the developer holding unit 50, and controls each unit based on the signal input from the main controller 101. As shown in FIG. 2, the control unit 100 includes a main controller 101 and a unit controller 102. An image signal is input to the main controller 101, and the unit controller 102 responds to an instruction based on the image signal. The unit is controlled to form an image. As shown in FIG. 2, the control unit 100 includes a main controller 101 and a unit controller 102. An image signal is input to the main controller 101, and the unit controller 102 responds to an instruction based on the image signal. The unit is controlled to form an image.
The main controller 101 is connected to a host computer via an interface 112, and includes an image memory 113 for storing an image signal input from the host computer, a CPU 111 for controlling the entire printer 10, and the like. The main controller 101 is connected to a host computer via an interface 112, and includes an image memory 113 for storing an image signal input from the host computer, a CPU 111 for controlling the entire printer 10, and the like.
The unit controller 102 includes a CPU 120, a memory 116 such as a RAM and a ROM, and units of the apparatus main body (charging unit 30, exposure unit 40, primary transfer unit 60, cleaning unit 75, secondary transfer unit 80, fixing unit 90, The display unit 95) and each drive control circuit for driving and controlling the developing device holding unit 50 are controlled, and each unit is controlled based on a signal input from the main controller 101. The unit controller 102 includes a CPU 120, a memory 116 such as a RAM and a ROM, and units of the apparatus main body (charging unit 30, exposure unit 40, primary transfer unit 60, cleaning unit 75, secondary transfer unit 80, fixing unit 90, The display unit 95) and each drive control circuit for driving and controlling the developing device holding unit 50 are controlled, and each unit is controlled based on a signal input from the main controller 101.

<プリンタ10の動作>
次に、プリンタ10の動作について、他の構成要素にも言及しつつ説明する。

まず、不図示のホストコンピュータからの画像信号がインターフェイス(I/F)112を介してプリンタ10のメインコントローラ101に入力されると、このメインコントローラ101からの指令に基づくユニットコントローラ102の制御により感光体20、現像器51、52、53、54に設けられた現像ローラ510、及び、中間転写体70が回転する。 First, when an image signal from a host computer (not shown) is input to the main controller 101 of the printer 10 via the interface (I / F) 112, it is exposed to light by the control of the unit controller 102 based on a command from the main controller 101. The body 20, the developing rollers 510 provided on the developers 51, 52, 53, 54, and the intermediate transfer body 70 rotate. 感光体20は、回転しながら、帯電位置において帯電ユニット30により帯電される。 The photoconductor 20 is charged by the charging unit 30 at the charging position while rotating. <Operation of Printer 10> <Operation of Printer 10>
Next, the operation of the printer 10 will be described with reference to other components. Next, the operation of the printer 10 will be described with reference to other components.
First, when an image signal from a host computer (not shown) is input to the main controller 101 of the printer 10 via the interface (I / F) 112, the photosensitive device is controlled by the unit controller 102 based on a command from the main controller 101. The developing roller 510 and the intermediate transfer member 70 provided on the body 20, the developing devices 51, 52, 53, and 54 rotate. The photoconductor 20 is charged by the charging unit 30 at the charging position while rotating. First, when an image signal from a host computer (not shown) is input to the main controller 101 of the printer 10 via the interface (I / F) 112, the producing device is controlled by the unit controller 102 based on a command from The main controller 101. The developing roller 510 and the intermediate transfer member 70 provided on the body 20, the developing devices 51, 52, 53, and 54 rotate. The photoconductor 20 is charged by the charging unit 30 at the charging position while rotating. ..

感光体20の帯電された領域は、感光体20の回転に伴って露光位置に至り、第1色目、例えばイエローYの画像情報に応じた潜像が露光ユニット40により形成される。このとき、現像器保持ユニット50は、イエロー(Y)トナーを収容したイエロー現像器54を、感光体20と対向する現像位置に位置させる。
感光体20上に形成された潜像は、感光体20の回転に伴って現像位置に至り、イエロー現像器54によってイエロートナーにて現像される。これにより、感光体20上にイエロートナー像が形成される。
感光体20上に形成されたイエロートナー像は、感光体20の回転に伴って一次転写位置に至り、一次転写ユニット60によって、中間転写体70に転写される。 The yellow toner image formed on the photoconductor 20 reaches the primary transfer position as the photoconductor 20 rotates, and is transferred to the intermediate transfer body 70 by the primary transfer unit 60. この際、一次転写ユニット60には、トナーの帯電極性とは逆の極性の一次転写電圧が印加される。 At this time, a primary transfer voltage having a polarity opposite to the charging polarity of the toner is applied to the primary transfer unit 60. なお、この間、二次転写ユニット80は、中間転写体70から離間している。 During this period, the secondary transfer unit 80 is separated from the intermediate transfer body 70. The charged region of the photoconductor 20 reaches the exposure position as the photoconductor 20 rotates, and a latent image corresponding to image information of the first color, for example, yellow Y, is formed by the exposure unit 40. At this time, the developing device holding unit 50 positions the yellow developing device 54 containing yellow (Y) toner at a developing position facing the photoconductor 20. The charged region of the photoconductor 20 reaches the exposure position as the photoconductor 20 rotates, and a latent image corresponding to image information of the first color, for example, yellow Y, is formed by the exposure unit 40. At this time, the developing device holding unit 50 positions the yellow developing device 54 containing yellow (Y) toner at a developing position facing the photoconductor 20.
The latent image formed on the photoconductor 20 reaches the development position as the photoconductor 20 rotates, and is developed with yellow toner by the yellow developing device 54. As a result, a yellow toner image is formed on the photoreceptor 20. The latent image formed on the photoconductor 20 reaches the development position as the photoconductor 20 rotates, and is developed with yellow toner by the yellow developing device 54. As a result, a yellow toner image is formed on the photoreceptor 20.
The yellow toner image formed on the photoconductor 20 reaches the primary transfer position as the photoconductor 20 rotates, and is transferred to the intermediate transfer body 70 by the primary transfer unit 60. At this time, a primary transfer voltage having a polarity opposite to the charging polarity of the toner is applied to the primary transfer unit 60. During this time, the secondary transfer unit 80 is separated from the intermediate transfer member 70. The yellow toner image formed on the photoconductor 20 reaches the primary transfer position as the photoconductor 20 rotates, and is transferred to the intermediate transfer body 70 by the primary transfer unit 60. At this time, a primary transfer voltage having a polarity opposite to the charging polarity of the toner is applied to the primary transfer unit 60. During this time, the secondary transfer unit 80 is separated from the intermediate transfer member 70.

上記の処理が、第2色目、第3色目、及び、第4色目について繰り返して実行されることにより、各画像信号に対応した4色のトナー像が、中間転写体70に重なって転写される。これにより、中間転写体70上にはフルカラートナー像が形成される。
中間転写体70上に形成されたフルカラートナー像は、中間転写体70の回転に伴って二次転写位置に至り、二次転写ユニット80によって記録媒体としての記録紙に転写される。なお、記録紙は、給紙トレイ92から、給紙ローラ94、レジローラ96を介して二次転写ユニット80へ搬送される。また、転写動作を行う際、二次転写ユニット80は中間転写体70に押圧されるとともに二次転写電圧が印加される。
記録紙に転写されたフルカラートナー像は、定着ユニット90によって加熱加圧されて記録紙に融着される。 The full-color toner image transferred to the recording paper is heated and pressed by the fixing unit 90 and fused to the recording paper. 一方、感光体20は一次転写位置を経過した後に、クリーニングブレード76によって、その表面に残存しているトナーが掻き落とされ、次の潜像を形成するための帯電に備える。 On the other hand, after the photoconductor 20 has passed the primary transfer position, the toner remaining on the surface of the photoconductor 20 is scraped off by the cleaning blade 76 to prepare for charging for forming the next latent image. 掻き落とされたトナーは、廃トナー収容部に回収される。 The scraped toner is collected in the waste toner housing. By repeating the above processing for the second color, the third color, and the fourth color, the four color toner images corresponding to the respective image signals are transferred onto the intermediate transfer body 70 in an overlapping manner. . As a result, a full color toner image is formed on the intermediate transfer member 70. By repeating the above processing for the second color, the third color, and the fourth color, the four color toner images corresponding to the respective image signals are transferred onto the intermediate transfer body 70 in an overlapping manner. As a result, a full color toner image is formed on the intermediate transfer member 70.
The full-color toner image formed on the intermediate transfer body 70 reaches the secondary transfer position as the intermediate transfer body 70 rotates, and is transferred to a recording sheet as a recording medium by the secondary transfer unit 80. The recording paper is conveyed from the paper feed tray 92 to the secondary transfer unit 80 via the paper feed roller 94 and the registration roller 96. When performing the transfer operation, the secondary transfer unit 80 is pressed against the intermediate transfer body 70 and a secondary transfer voltage is applied. The full-color toner image formed on the intermediate transfer body 70 reaches the secondary transfer position as the intermediate transfer body 70 rotates, and is transferred to a recording sheet as a recording medium by the secondary transfer unit 80. The recording paper is transmitted from The paper feed tray 92 to the secondary transfer unit 80 via the paper feed roller 94 and the registration roller 96. When performing the transfer operation, the secondary transfer unit 80 is pressed against the intermediate transfer body 70 and a secondary transfer voltage is applied.
The full-color toner image transferred to the recording paper is heated and pressurized by the fixing unit 90 and fused to the recording paper. On the other hand, after the primary transfer position has elapsed, the toner remaining on the surface of the photoreceptor 20 is scraped off by the cleaning blade 76 to prepare for charging for forming the next latent image. The toner scraped off is collected in a waste toner container. The full-color toner image transferred to the recording paper is heated and heated by the fixing unit 90 and fused to the recording paper. On the other hand, after the primary transfer position has elapsed, the toner remaining on the surface of the lithography 20 is scraped off by the cleaning blade 76 to prepare for charging for forming the next latent image. The toner scraped off is collected in a waste toner container.

===現像器の概要===
次に、図3〜図5を用いて、現像器の構成例について説明する。 Next, a configuration example of the developer will be described with reference to FIGS. 3 to 5. 図3は、イエロー現像器の斜視図である。 FIG. 3 is a perspective view of the yellow developer. 図4は、イエロー現像器の主要構成要素を示した断面図である。 FIG. 4 is a cross-sectional view showing the main components of the yellow developer. 図5は、現像ローラが取り外された現像器を示す斜視図である。 FIG. 5 is a perspective view showing a developing device from which the developing roller has been removed. なお、図4に示す断面図は、図3に示す長手方向に垂直な面でイエロー現像器を切った断面を表した図である。 The cross-sectional view shown in FIG. 4 is a view showing a cross section of the yellow developing device cut along a plane perpendicular to the longitudinal direction shown in FIG. また、図4においては、図1同様、矢印にて上下方向を示しており、例えば、現像ローラ510の中心軸は、感光体20の中心軸よりも下方にある。 Further, in FIG. 4, as in FIG. 1, the vertical direction is indicated by an arrow. For example, the central axis of the developing roller 510 is lower than the central axis of the photoconductor 20. また、図4では、イエロー現像器54が、感光体20と対向する現像位置に位置している状態にて示されている。 Further, in FIG. 4, the yellow developer 54 is shown in a state where it is located at a developing position facing the photoconductor 20. === Overview of Developer === === Overview of Developer ===
Next, a configuration example of the developing device will be described with reference to FIGS. FIG. 3 is a perspective view of the yellow developing device. FIG. 4 is a cross-sectional view showing the main components of the yellow developing device. FIG. 5 is a perspective view showing the developing device with the developing roller removed. The cross-sectional view shown in FIG. 4 is a view showing a cross section obtained by cutting the yellow developing device along a plane perpendicular to the longitudinal direction shown in FIG. 4, the vertical direction is indicated by arrows as in FIG. 1. For example, the central axis of the developing roller 510 is below the central axis of the photoconductor 20. Further, in FIG. 4, the yellow developing device 54 is shown in a state where the yellow developing device 54 is located at a developing position facing the photoconductor 20. Next, a configuration example of the developing device will be described with reference to FIGS. FIG. 3 is a perspective view of the yellow developing device. FIG. 4 is a cross-sectional view showing the main components of the yellow developing device. FIG. 5 is a perspective view showing the developing device with the developing roller removed. The cross-sectional view shown in FIG. 4 is a view showing a cross section obtained by cutting the yellow developing device along a plane perpendicular to the longitudinal direction shown in FIG. 4, the vertical direction is indicated by arrows as in FIG. 1. For example, the central axis of the developing roller 510 is below the central axis of the photoconductor 20. Further, in FIG. 4, the yellow developing device 54 is shown in a state where the yellow developing device 54 is located at a developing position facing the photoconductor 20.

現像器保持ユニット50には、ブラック(K)トナーを収容したブラック現像器51、マゼンタ(M)トナーを収容したマゼンタ現像器52、シアン(C)トナーを収容したシアン現像器53、及び、イエロー(Y)トナーを収容したイエロー現像器54が設けられているが、各現像器の構成は同様であるので、以下、イエロー現像器54について説明する。   The developing device holding unit 50 includes a black developing device 51 containing black (K) toner, a magenta developing device 52 containing magenta (M) toner, a cyan developing device 53 containing cyan (C) toner, and yellow. (Y) Although the yellow developing unit 54 containing toner is provided, the configuration of each developing unit is the same, so the yellow developing unit 54 will be described below.

<イエロー現像器54の構成>
イエロー現像器54は、トナーTを収容するハウジング540、トナーを担持するためのトナー粒子担持ローラの一例としての現像ローラ510、現像ローラ510にトナーを供給するためのトナー供給ローラ550、現像ローラ510に担持されたトナーの層厚を規制するための層厚規制部材の一例としての規制ブレード560、ハウジング540と現像ローラ510との上方側の間隙をシールするための上シール520、ハウジング540と現像ローラ510との端部側の間隙をシールするための端部シール527等を有している。
<Configuration of Yellow Developer 54>
The yellow developing unit 54 includes a housing 540 that accommodates toner T, a developing roller 510 as an example of a toner particle carrying roller for carrying toner, a toner supply roller 550 for supplying toner to the developing roller 510, and a developing roller 510. A regulating blade 560 as an example of a layer thickness regulating member for regulating the layer thickness of the toner carried on the toner, an upper seal 520 for sealing the upper gap between the housing 540 and the developing roller 510, and development with the housing 540 An end seal 527 for sealing a gap on the end side with the roller 510 is provided. The yellow developing unit 54 includes a housing 540 that accommodates toner T, a developing roller 510 as an example of a toner particle carrying roller for carrying toner, a toner supply toner 550 for supplying toner to the developing roller 510, and a developing roller 510 A regulating blade 560 as an example of a layer thickness regulating member for regulating the layer thickness of the toner carried on the toner, an upper seal 520 for sealing the upper gap between the housing 540 and the developing roller 510, and development with the housing 540 An end seal 527 for sealing a gap on the end side with the roller 510 is provided.

ハウジング540は、一体成型された樹脂製の上ハウジング部542と下ハウジング部544とを溶着して製造されたものであり、その内部に、トナーTを収容するための収容部としてのトナー収容部530が形成されている。トナー収容部530は、内壁から内方へ(図4の上下方向)突出させたトナーTを仕切るための仕切り壁545により、二つのトナー収容部、すなわち、第一トナー収容部530aと第二トナー収容部530bと、に分けられている。   The housing 540 is manufactured by welding an integrally molded resin upper housing portion 542 and lower housing portion 544, and a toner storage portion serving as a storage portion for storing the toner T therein. 530 is formed. The toner storage portion 530 is divided into two toner storage portions, that is, a first toner storage portion 530a and a second toner, by a partition wall 545 for partitioning the toner T that protrudes inwardly (in the vertical direction in FIG. 4) from the inner wall. It is divided into the accommodating portion 530b.

そして、第一トナー収容部530aと第二トナー収容部530bとは、上部が連通されているが、図4に示す状態では、仕切り壁545によりトナーTの移動が規制されている。しかしながら、現像器保持ユニット50が回転する際には、第一トナー収容部530aと第二トナー収容部530bとに収容されていたトナーが、現像位置における上部側の連通している部位側に一旦集められ、図4に示す状態に戻るときには、それらのトナーが混合されて第一トナー収容部530a及び第二トナー収容部530bに戻されることになる。すなわち、現像器保持ユニット50が回転することにより現像器内のトナーTは撹拌されることになる。このため、本実施の形態では、トナー収容部530に攪拌部材を設けていないが、トナー収容部530に収容されたトナーTを攪拌するための攪拌部材を設けてもよい。図4に示すように、ハウジング540は下部に開口572を有しており、後述する現像ローラ510が、この開口572に臨ませて設けられている。   The upper portions of the first toner storage portion 530a and the second toner storage portion 530b communicate with each other. In the state shown in FIG. 4, the movement of the toner T is restricted by the partition wall 545. However, when the developing device holding unit 50 rotates, the toner stored in the first toner storage portion 530a and the second toner storage portion 530b is temporarily moved to the upper communicating side of the developing position. When the toner is collected and returns to the state shown in FIG. 4, the toners are mixed and returned to the first toner storage portion 530a and the second toner storage portion 530b. That is, the toner T in the developing device is agitated by the rotation of the developing device holding unit 50. For this reason, in this embodiment, the stirring member is not provided in the toner storage portion 530, but a stirring member for stirring the toner T stored in the toner storage portion 530 may be provided. As shown in FIG. 4, the housing 540 has an opening 572 in the lower portion, and a developing roller 510 described later is provided so as to face the opening 572.

トナー供給ローラ550は、弾性を有する例えば発泡ウレタンにて形成されたローラ部550aと、ローラ部550aの回転中心となる軸体550bとで構成されている。そして、トナー供給ローラ550は、軸体550bの両端側にてハウジング540に支持されることにより、軸体550bまわりに回転自在に支持されている。前記ローラ部550aは、ハウジング540の前述した第一トナー収容部530a(ハウジング540内)に収容されており、第一トナー収容部530aに収容されたトナーTを現像ローラ510に供給する。トナー供給ローラ550は、第一トナー収容部530aの鉛直下方に設けられている。第一トナー収容部530aに収容されたトナーTは、該第一トナー収容部530aの下部にてトナー供給ローラ550によって現像ローラ510に供給される。また、トナー供給ローラ550は、現像後に現像ローラ510に残存している余剰なトナーTを、現像ローラ510から剥ぎ取る。   The toner supply roller 550 includes an elastic roller portion 550a formed of, for example, urethane foam, and a shaft body 550b that serves as a rotation center of the roller portion 550a. The toner supply roller 550 is supported by the housing 540 at both ends of the shaft body 550b, so that the toner supply roller 550 is rotatably supported around the shaft body 550b. The roller portion 550 a is accommodated in the first toner accommodating portion 530 a (inside the housing 540) of the housing 540 and supplies the toner T accommodated in the first toner accommodating portion 530 a to the developing roller 510. The toner supply roller 550 is provided vertically below the first toner storage portion 530a. The toner T accommodated in the first toner accommodating portion 530a is supplied to the developing roller 510 by the toner supply roller 550 below the first toner accommodating portion 530a. Further, the toner supply roller 550 peels off the excess toner T remaining on the developing roller 510 after development from the developing roller 510.

トナー供給ローラ550と、現像ローラ510とは、互いに押圧された状態にてハウジング540に組み付けられている。このため、トナー供給ローラ550のローラ部550aは、弾性変形された状態で現像ローラ510に当接している。そして、トナー供給ローラ550は、現像ローラ510の回転方向(図4において反時計方向)と逆の方向(図4において時計方向)に回転する。軸体550bは、現像ローラ510の回転中心軸よりも下方にある。   The toner supply roller 550 and the developing roller 510 are assembled to the housing 540 while being pressed against each other. Therefore, the roller portion 550a of the toner supply roller 550 is in contact with the developing roller 510 in an elastically deformed state. The toner supply roller 550 rotates in a direction (clockwise in FIG. 4) opposite to the rotation direction of the developing roller 510 (counterclockwise in FIG. 4). The shaft body 550b is below the rotation center axis of the developing roller 510.

現像ローラ510は、トナーTを担持して感光体20と対向する現像位置に搬送する。この現像ローラ510は、金属製であり、5056アルミ合金や6063アルミ合金等のアルミ合金、STKM等の鉄合金等により製造されており、必要に応じて、ニッケルメッキ、クロムメッキ等が施されていてもよい。現像ローラ510の表面には、現像ローラ510の軸方向における中央部に螺旋状に形成された溝状の凹部(以下、溝部ともいう)が設けられている。現像ローラ510の表面形状については後で詳述する。   The developing roller 510 carries the toner T and conveys it to a developing position facing the photoconductor 20. The developing roller 510 is made of metal and is made of an aluminum alloy such as 5056 aluminum alloy or 6063 aluminum alloy, or an iron alloy such as STKM, and is subjected to nickel plating, chrome plating, or the like as necessary. May be. On the surface of the developing roller 510, a groove-like recess (hereinafter also referred to as a groove) formed in a spiral shape at the center in the axial direction of the developing roller 510 is provided. The surface shape of the developing roller 510 will be described in detail later.

また、現像ローラ510は、図3に示すとおり、その長手方向両端部で支持されており、中心軸を中心として回転可能である。図4に示すように、現像ローラ510は、感光体20の回転方向(図4において時計方向)と逆の方向(図4において反時計方向)に回転する。その中心軸は、感光体20の中心軸よりも下方にある。   Further, as shown in FIG. 3, the developing roller 510 is supported at both ends in the longitudinal direction, and is rotatable about the central axis. As shown in FIG. 4, the developing roller 510 rotates in a direction (counterclockwise in FIG. 4) opposite to the rotation direction of the photoconductor 20 (clockwise in FIG. 4). The central axis is below the central axis of the photoconductor 20.

また、図4に示すように、イエロー現像器54が感光体20と対向している状態では、現像ローラ510と感光体20との間には空隙が存在する。すなわち、イエロー現像器54は、感光体20上に形成された潜像を非接触状態で現像する。なお、感光体20上に形成された潜像を現像する際には、現像ローラ510と感光体20との間に交番電界が形成される。   As shown in FIG. 4, there is a gap between the developing roller 510 and the photoconductor 20 in a state where the yellow developing device 54 faces the photoconductor 20. That is, the yellow developing device 54 develops the latent image formed on the photoconductor 20 in a non-contact state. When developing the latent image formed on the photoconductor 20, an alternating electric field is formed between the developing roller 510 and the photoconductor 20.

規制ブレード560は、現像ローラ510に担持されたトナーTに電荷を付与し、また、現像ローラ510に担持されたトナーTの層厚を規制する。この規制ブレード560は、ゴム部560aと、ゴム支持部560bとを有している。ゴム部560aは、シリコンゴム、ウレタンゴム等からなり、ゴム支持部560bは、リン青銅、ステンレス等のバネ性を有する薄板である。ゴム部560aは、ゴム支持部560bの長手方向に沿わされてゴム支持部560bの短手方向の一旦側に支持されており、ゴム支持部560bは、その他端側がブレード支持板金562に支持された状態で当該ブレード支持板金562を介してハウジング540に取り付けられている。また、規制ブレード560の現像ローラ510側とは逆側には、モルトプレーン等からなるブレード裏部材570が設けられている。   The regulating blade 560 applies a charge to the toner T carried on the developing roller 510 and regulates the layer thickness of the toner T carried on the developing roller 510. The regulation blade 560 has a rubber part 560a and a rubber support part 560b. The rubber part 560a is made of silicon rubber, urethane rubber or the like, and the rubber support part 560b is a thin plate having spring properties such as phosphor bronze or stainless steel. The rubber portion 560a is supported on the short side of the rubber support portion 560b along the longitudinal direction of the rubber support portion 560b, and the other end side of the rubber support portion 560b is supported by the blade support metal plate 562. In this state, it is attached to the housing 540 via the blade support sheet metal 562. Further, a blade back member 570 made of malt plane or the like is provided on the side opposite to the developing roller 510 side of the regulating blade 560.

ここで、ゴム支持部560bの撓みによる弾性力によって、ゴム部560aが現像ローラ510の中央部から両端部に亘って押しつけられている。また、ブレード裏部材570は、ゴム支持部560bとハウジング540との間にトナーTが入り込むことを防止して、ゴム支持部560bの撓みによる弾性力を安定させるとともに、ゴム部560aの真裏からゴム部560aを現像ローラ510の方向へ付勢することによって、ゴム部560aを現像ローラ510に押しつけている。したがって、ブレード裏部材570は、ゴム部560aの現像ローラ510への均一当接性を向上させている。   Here, the rubber portion 560 a is pressed from the central portion of the developing roller 510 to both ends by the elastic force due to the bending of the rubber support portion 560 b. Further, the blade back member 570 prevents the toner T from entering between the rubber support portion 560b and the housing 540, stabilizes the elastic force due to the bending of the rubber support portion 560b, and provides rubber from the back of the rubber portion 560a. The rubber portion 560 a is pressed against the developing roller 510 by urging the portion 560 a toward the developing roller 510. Therefore, the blade back member 570 improves the uniform contact property of the rubber portion 560a to the developing roller 510.

規制ブレード560の、ブレード支持板金562に支持されている側とは逆側の端、すなわち、先端は、現像ローラ510に接触しておらず、該先端から所定距離だけ離れた部分が、現像ローラ510に幅を持って接触している。換言すると、規制ブレード560は、現像ローラ510にエッジにて当接しておらず、ゴム部560aが有する平面にて腹当たりにて当接している。また、規制ブレード560は、その先端が現像ローラ510の回転方向の上流側に向くように配置されており、いわゆるカウンタ当接している。なお、規制ブレード560が現像ローラ510に当接する当接位置は、現像ローラ510の中心軸よりも下方であり、かつ、トナー供給ローラ550の中心軸よりも下方である。   The end of the regulating blade 560 opposite to the side supported by the blade support metal plate 562, that is, the tip is not in contact with the developing roller 510, and a portion away from the tip by a predetermined distance is the developing roller. 510 is in contact with a width. In other words, the regulating blade 560 is not in contact with the developing roller 510 at the edge, but is in contact with the antinode on the flat surface of the rubber portion 560a. The regulating blade 560 is disposed so that the tip thereof faces the upstream side in the rotation direction of the developing roller 510, and is in a so-called counter contact. The contact position where the regulating blade 560 contacts the developing roller 510 is below the central axis of the developing roller 510 and below the central axis of the toner supply roller 550.

また、ゴム支持部560bは、ゴム部560aより現像ローラ510の軸方向に長く設けられており、ゴム部560aの両端より外側にそれぞれ延出されている。ゴム支持部560bの延出された部位には、ゴム部560aより厚い厚みを有する例えば不織布製の端部シール527が、ゴム部と560aと同一面に貼着されている。このとき、ゴム部560aの軸方向の端面は端部シール527の側面に当接されている。   The rubber support portion 560b is longer than the rubber portion 560a in the axial direction of the developing roller 510, and extends outward from both ends of the rubber portion 560a. An end seal 527 made of, for example, a nonwoven fabric having a thickness thicker than that of the rubber portion 560a is attached to the same surface as the rubber portion and 560a at the extended portion of the rubber support portion 560b. At this time, the end surface of the rubber portion 560 a in the axial direction is in contact with the side surface of the end seal 527.

端部シール527は、現像ローラ510を取り付けた際に、現像ローラ510の表面における溝部が設けられていない両端部に当接するように設けられ、現像ローラ510の端部より外側に至る幅を有している。また、端部シール527は、規制ブレード560のゴム部560aの先端より十分に長く延出されている。規制ブレード560がハウジング540に取り付けられると、端部シール527は、現像ローラ510外周面と対向するように形成されたハウジング540の部位に沿わされ、ハウジング540と現像ローラ510との間隙を閉塞する。   The end seal 527 is provided so as to come into contact with both end portions of the surface of the developing roller 510 where no groove portion is provided when the developing roller 510 is attached, and has a width extending from the end portion of the developing roller 510 to the outside. is doing. Further, the end seal 527 extends sufficiently longer than the tip of the rubber portion 560 a of the regulating blade 560. When the regulating blade 560 is attached to the housing 540, the end seal 527 is placed along a portion of the housing 540 formed so as to face the outer peripheral surface of the developing roller 510, and closes the gap between the housing 540 and the developing roller 510. .

上シール520は、イエロー現像器54内のトナーTが器外に漏れることを防止するとともに、現像位置を通過した現像ローラ510上のトナーTを、掻き落とすことなく現像器内に回収する。この上シール520は、ポリエチレンフィルム等からなるシールである。上シール520は、シール支持板金522によって支持されており、シール支持板金522を介してハウジング540に取り付けられている。また、上シール520の現像ローラ510側とは逆側には、モルトプレーン等からなるシール付勢部材524が設けられており、上シール520は、シール付勢部材524の弾性力によって、現像ローラ510に押しつけられている。なお、上シール520が現像ローラ510に当接する当接位置は、現像ローラ510の中心軸よりも上方である。   The upper seal 520 prevents the toner T in the yellow developing device 54 from leaking out of the device, and collects the toner T on the developing roller 510 that has passed through the developing position into the developing device without being scraped off. The upper seal 520 is a seal made of a polyethylene film or the like. The upper seal 520 is supported by a seal support sheet metal 522 and is attached to the housing 540 via the seal support sheet metal 522. A seal urging member 524 made of malt plain or the like is provided on the opposite side of the upper seal 520 from the developing roller 510 side. The upper seal 520 is developed by the elastic force of the seal urging member 524. 510 is pressed. The contact position at which the upper seal 520 contacts the developing roller 510 is above the central axis of the developing roller 510.

<イエロー現像器54の動作>
このように構成されたイエロー現像器54において、トナー供給ローラ550がトナー収容部530に収容されているトナーTを現像ローラ510に供給する。現像ローラ510に供給されたトナーTは、現像ローラ510の回転に伴って、規制ブレード560の当接位置に至り、該当接位置を通過する際に、電荷が付与されるとともに、層厚が規制される。
<Operation of Yellow Developer 54>
In the yellow developing device 54 configured as described above, the toner supply roller 550 supplies the toner T accommodated in the toner accommodating portion 530 to the developing roller 510. The toner T supplied to the developing roller 510 reaches the contact position of the regulating blade 560 as the developing roller 510 rotates, and when passing through the contact position, an electric charge is applied and the layer thickness is regulated. Is done. In the yellow developing device 54 configured as described above, the toner supply roller 550 supplies the toner T accommodated in the toner accommodating portion 530 to the developing roller 510. The toner T supplied to the developing roller 510 reaches the contact position of the regulating blade 560 as the developing roller 510 rotates, and when passing through the contact position, an electric charge is applied and the layer thickness is regulated. Is done.

帯電された現像ローラ510上のトナーTは、現像ローラ510のさらなる回転によって、感光体20に対向する現像位置に至り、該現像位置にて交番電界下で感光体20上に形成された潜像の現像に供される。現像ローラ510のさらなる回転によって現像位置を通過した現像ローラ510上のトナーTは、上シール520を通過して、上シール520によって掻き落とされることなく現像器内に回収される。さらに、未だ現像ローラ510に残存しているトナーTは、前記トナー供給ローラ550によって剥ぎ取られうる。   The charged toner T on the developing roller 510 reaches a developing position facing the photoconductor 20 by further rotation of the developing roller 510, and a latent image formed on the photoconductor 20 under an alternating electric field at the developing position. For development. The toner T on the developing roller 510 that has passed the developing position by further rotation of the developing roller 510 passes through the upper seal 520 and is collected in the developing device without being scraped off by the upper seal 520. Further, the toner T still remaining on the developing roller 510 can be peeled off by the toner supply roller 550.

===現像ローラの表面形状===
図6は、現像ローラの表面形状を説明するための概念図である。図7は、現像ローラを、軸を通る平面で切断した際の断面を説明するための断面図である。図6では現像ローラ510の表面の凹部としての溝部が便宜上直線にて示されているが、溝部は螺旋状に形成されているため、正確には曲線に見えるように形成されている。
=== Surface shape of developing roller ===
FIG. 6 is a conceptual diagram for explaining the surface shape of the developing roller. FIG. 7 is a cross-sectional view for explaining a cross section when the developing roller is cut along a plane passing through an axis. In FIG. 6, the groove portion as the concave portion on the surface of the developing roller 510 is shown by a straight line for convenience, but since the groove portion is formed in a spiral shape, the groove portion is formed so that it looks exactly like a curve. FIG. 6 is a conceptual diagram for explaining the surface shape of the developing roller. FIG. 7 is a cross-sectional view for explaining a cross section when the developing roller is cut along a plane passing through an axis. In FIG. 6, the groove portion as the concave portion on the surface of the developing roller 510 is shown by a straight line for convenience, but since the groove portion is formed in a spiral shape, the groove portion is formed so that it looks exactly like a curve.

現像ローラ510は、軸方向における中央部510aにトナー粒子を担持するための凹凸部が設けられ、両端部510bには前記端部シール527が密着するように滑らかな周面を備えている。   The developing roller 510 is provided with a concavo-convex portion for supporting toner particles in the central portion 510a in the axial direction, and both end portions 510b have smooth peripheral surfaces so that the end seals 527 are in close contact with each other.

図6に示すように、本実施形態における現像ローラ510の中央部510aには、現像ローラ510の軸方向及び周方向に対し傾斜を有し軸方向に等ピッチに形成された螺旋状の溝部511が形成されている。この溝部511は、現像ローラ510の軸方向及び周方向に対する傾斜の角度を異ならせて2種類形成されている。前記2種類の溝部511は、互いに交差して格子状をなし、前記2種類の前記溝部511に囲まれた凸部512の頂面512aがほぼ正方形となるように形成されている。また、2種類の前記溝部511は、凸部512の頂面512aの正方形が有する2本の対角線の一方が周方向に沿うように形成されている。   As shown in FIG. 6, in the central portion 510 a of the developing roller 510 in this embodiment, a spiral groove 511 that is inclined with respect to the axial direction and the circumferential direction of the developing roller 510 and is formed at an equal pitch in the axial direction. Is formed. The groove portion 511 is formed in two types with different inclination angles with respect to the axial direction and the circumferential direction of the developing roller 510. The two types of groove portions 511 intersect with each other to form a lattice shape, and the top surface 512a of the convex portion 512 surrounded by the two types of groove portions 511 is formed in a substantially square shape. Further, the two types of the groove portions 511 are formed so that one of the two diagonal lines of the square of the top surface 512a of the convex portion 512 is along the circumferential direction.

すなわち、2種類の溝部511のうち一方は、現像ローラ510の軸と時計回り方向に45°の角度をなすように螺旋状に形成されており、他方は、現像ローラ510の軸と反時計回り方向に45°の角度をなすように螺旋状に形成されている。このため一方の溝部511aと他方の溝部511bとの交差する角度は90°となる。また、一方の溝部511a及び他方の溝部511bの、現像ローラ510の軸方向におけるピッチは、等しく形成されているため、2種類の溝部に囲まれた凸部512の頂面512aの形状はほぼ正方形となる。   That is, one of the two types of grooves 511 is formed in a spiral shape so as to form an angle of 45 ° clockwise with the axis of the developing roller 510, and the other is counterclockwise with the axis of the developing roller 510. It is formed in a spiral shape so as to form an angle of 45 ° in the direction. For this reason, the angle at which one groove 511a and the other groove 511b intersect is 90 °. In addition, since the pitch in the axial direction of the developing roller 510 of the one groove portion 511a and the other groove portion 511b is equal, the shape of the top surface 512a of the convex portion 512 surrounded by the two types of groove portions is substantially square. It becomes.

2種類の溝部511は、図7に示すように、各々現像ローラ510の軸方向に80μmの間隔にて形成されており、凸部512の頂面512aから溝部511の底面511cに至る傾斜部分511dの角度は、溝部511を形成する2つの斜面を軸心C方向に延長した仮想面の交差角度αが90°になるように形成されている。
また、溝部511の深さ、すなわち、凸部512の頂面512aから溝部511の底面511cまでの距離は、約7μmで一定になるように形成されている。 Further, the depth of the groove portion 511, that is, the distance from the top surface 512a of the convex portion 512 to the bottom surface 511c of the groove portion 511 is formed so as to be constant at about 7 μm. ここで、トナーの体積平均粒径は、およそ5〜10μmであり、溝部511の深さは、トナーの体積平均粒径の2倍以下となるように設定されている。 Here, the volume average particle diameter of the toner is about 5 to 10 μm, and the depth of the groove portion 511 is set to be twice or less the volume average particle diameter of the toner. As shown in FIG. 7, the two types of groove portions 511 are each formed at an interval of 80 μm in the axial direction of the developing roller 510, and an inclined portion 511 d extending from the top surface 512 a of the convex portion 512 to the bottom surface 511 c of the groove portion 511. Is formed such that the intersecting angle α of the virtual plane obtained by extending the two inclined surfaces forming the groove 511 in the direction of the axis C is 90 °. As shown in FIG. 7, the two types of groove portions 511 are each formed at an interval of 80 μm in the axial direction of the developing roller 510, and an inclined portion 511 d extending from the top surface 512 a of the convex portion 512 to the bottom surface 511 c of the groove portion 511. Is formed such that the intersecting angle α of the virtual plane obtained by extending the two inclined surfaces forming the groove 511 in the direction of the axis C is 90 °.
Further, the depth of the groove portion 511, that is, the distance from the top surface 512a of the convex portion 512 to the bottom surface 511c of the groove portion 511 is formed to be constant at about 7 μm. Here, the volume average particle diameter of the toner is about 5 to 10 μm, and the depth of the groove 511 is set to be not more than twice the volume average particle diameter of the toner. Further, the depth of the groove portion 511, that is, the distance from the top surface 512a of the convex portion 512 to the bottom surface 511c of the groove portion 511 is formed to be constant at about 7 μm. Here, the volume average particle diameter of the toner is about 5 to 10 μm, and the depth of the groove 511 is set to be not more than twice the volume average particle diameter of the toner.

このような現像ローラ510は、転造により形成される。図8は、現像ローラ510が転造により形成される様子を説明するための図である。図9は、現像ローラが形成される手順を示す図である。 Such a developing roller 510 is formed by rolling. FIG. 8 is a diagram for explaining how the developing roller 510 is formed by rolling. FIG. 9 is a diagram illustrating a procedure for forming the developing roller.

現像ローラ510は、円筒状の中空の素材から形成される。
円筒状の素材は、まず、現像ローラ510としてトナーを担持するための中央部510aと端部シール527が当接される端部510bとを形成可能な長さに切断されて円筒部材515が切り出される(S001)。 The cylindrical material is first cut to a length capable of forming a central portion 510a for supporting toner as a developing roller 510 and an end portion 510b to which the end seal 527 is abutted, and the cylindrical member 515 is cut out. (S001). 円筒部材515には、両端部の内周部に現像ローラ510の軸を有するフランジ513を嵌入するための段部510c(図6)が切削加工により形成される(S002)。 In the cylindrical member 515, a step portion 510c (FIG. 6) for fitting a flange 513 having a shaft of a developing roller 510 is formed on the inner peripheral portions of both end portions by cutting (S002). ここで、フランジ513は、形成された段部510cに圧入される直径を有する円盤状のフランジ本体513aと、その中心から円盤面に垂直となるように凸設された軸部513bとを有している。 Here, the flange 513 has a disk-shaped flange body 513a having a diameter press-fitted into the formed step portion 510c, and a shaft portion 513b projecting from the center thereof so as to be perpendicular to the disk surface. ing. The developing roller 510 is formed from a cylindrical hollow material. The developing roller 510 is formed from a cylindrical hollow material.
The cylindrical material is first cut to a length that can form a central portion 510a for carrying toner as the developing roller 510 and an end portion 510b with which the end seal 527 abuts, and the cylindrical member 515 is cut out. (S001). In the cylindrical member 515, a step portion 510c (FIG. 6) for fitting the flange 513 having the shaft of the developing roller 510 is formed in the inner peripheral portion of both end portions by cutting (S002). Here, the flange 513 includes a disk-shaped flange main body 513a having a diameter that is press-fitted into the formed stepped portion 510c, and a shaft portion 513b that protrudes perpendicularly to the disk surface from the center thereof. ing. The cylindrical material is first cut to a length that can form a central portion 510a for carrying toner as the developing roller 510 and an end portion 510b with which the end seal 527 abuts, and the cylindrical member 515 is cut out. (S001). In the cylindrical member 515, a step portion 510c (FIG. 6) for fitting the flange 513 having the shaft of the developing roller 510 is formed in the inner peripheral portion of both end portions by cutting (S002). Here, the flange 513 includes a disk-shaped flange main body 513a having a diameter that is press-fitted into the formed stepped portion 510c, and a shaft portion 513b that protrudes perpendicularly to the disk surface from the center thereof.

次に、両端部の内側に段部510cが形成された円筒部材515に軸部513bを有するフランジ513が、その軸部513bが円筒部材の外方に突出するようにそれぞれ嵌入される(S003)。   Next, the flange 513 having the shaft portion 513b is fitted into the cylindrical member 515 having the step portion 510c formed inside the both end portions so that the shaft portion 513b protrudes outward of the cylindrical member (S003). .

その後、フランジ513が嵌入された円筒部材515は両端の軸部513bが支持されて軸を中心として回転され、円筒部材515の外周面が全周に亘って僅かに切削されることにより、表面の全領域が軸と同心、すなわちから一定の距離Lとなるように円筒部材515の表面が研磨されて未転造加工現像ローラ509が形成される(S004)。   Thereafter, the cylindrical member 515 in which the flange 513 is fitted is supported by the shaft portions 513b at both ends and rotated around the shaft, and the outer peripheral surface of the cylindrical member 515 is slightly cut over the entire circumference, thereby The surface of the cylindrical member 515 is polished so that the entire region is concentric with the shaft, that is, a certain distance L from the shaft, thereby forming the non-rolled developing roller 509 (S004).

表面が研磨された円筒部材515は、図8に示すような2種類の加工工具としてのダイス900を備えた装置により転造にて、表面に2種類の溝部511a,511bが形成される(S005)。転造装置は、対向する位置に配置された2種類のダイス900が同方向に回転している間にワーク(ここでは、未転造加工現像ローラ509)を配置し、2種類のダイス900を未転造加工現像ローラ509に押圧させ、未転造加工現像ローラ509をダイス900と反対方向に回転させつつ軸方向に搬送する。ダイス900には、上述した溝部511a,511bを形成するための刃900aが、各々設けられており、互いの刃900aは、未転造加工現像ローラ509の表面に互いの刃にて形成された溝部511a、511bが直行するように傾斜が設けられている。ここで、ダイス900が未転造加工現像ローラ509の表面に当接される部位を刃900aとしているが、転造加工はワークを積極的に切削するものではなく、押圧力によりワークを押し潰して窪みを形成するように作用する。また、この転造の際には、未転造加工現像ローラ509には、その両端部510bにてダイス900が当接されないようにして、両端部510bには凹凸のない滑らかな面を残しておく。すなわち、現像ローラ510の中央部510aにて凹部を挟んで配置されてダイス900が接触しなかった凸部512の頂面512a同士、及び、中央部510aにてダイス900が接触しなかった凸部512の頂面512aと、転造による加工対象とされない両端部510bとは、軸心Cからの距離Lが一定になるように切削されたままなので、軸心Cから等距離に位置している。そして、現像ローラ510の表面510dは、ダイス900が接触して凹設された溝部511a,511bの底面511cと、ダイス900が接触しなかった非加工面とで、ほぼ覆われている。   The cylindrical member 515 whose surface has been polished is rolled by an apparatus having a die 900 as two types of processing tools as shown in FIG. 8 to form two types of grooves 511a and 511b on the surface (S005). ). The rolling device arranges the workpiece (here, the non-rolled processing developing roller 509) while the two types of dies 900 arranged at opposite positions are rotating in the same direction, and the two types of dies 900 are arranged. The unrolled developing roller 509 is pressed, and the unrolled developing roller 509 is conveyed in the axial direction while rotating in the direction opposite to the die 900. The die 900 is provided with blades 900a for forming the above-described grooves 511a and 511b. The blades 900a are formed on the surface of the non-roll processed developing roller 509 with the blades. An inclination is provided so that the grooves 511a and 511b are orthogonal. Here, the part where the die 900 is brought into contact with the surface of the non-rolling processing developing roller 509 is the blade 900a. However, the rolling process does not actively cut the work, but the work is crushed by the pressing force. Acts to form a depression. Further, during this rolling, the non-rolled developing roller 509 is not contacted with the die 900 at both ends 510b, leaving a smooth surface without unevenness at both ends 510b. deep. That is, the top surfaces 512a of the convex portions 512 which are arranged with the concave portion interposed between the central portions 510a of the developing roller 510 and the dice 900 are not in contact with each other, and the convex portions where the dice 900 are not in contact with the central portion 510a. Since the top surface 512a of 512 and both ends 510b not to be processed by rolling remain cut so that the distance L from the axis C is constant, they are located at an equal distance from the axis C. . The surface 510d of the developing roller 510 is substantially covered with the bottom surfaces 511c of the grooves 511a and 511b that are recessed by the contact of the die 900 and the non-processed surface that the die 900 does not contact.

転造にて形成した現像ローラ510には必要に応じて、例えば無電解Ni−Pめっき、電気めっき、硬質クロームめっき等を施してもよい。   The developing roller 510 formed by rolling may be subjected to, for example, electroless Ni—P plating, electroplating, or hard chrome plating, if necessary.

このような現像ローラ510には、両端部510bにてそれぞれ当接された端部シール527間にトナー供給ローラ550からトナーが供給され、規制ブレード560の押圧位置にてトナー層の層厚が規制される。このとき、規制ブレード560は、現像ローラ510の両端部510bと中央部510aとに亘って押圧されるが、現像ローラ510の両端部510bと凸部512の頂面512aは軸心Cからの距離Lが一定なので、規制ブレード560は大きく屈曲することなくほぼ平坦な状態にて現像ローラ510を押圧する。このため、例えば、両端部510bと中央部510aとの境界付近であっても現像ローラ510の表面510dと規制ブレード560との間に極端に大きな間隙は生じない。   To such a developing roller 510, toner is supplied from the toner supply roller 550 between the end seals 527 abutted at both ends 510b, and the thickness of the toner layer is regulated at the pressing position of the regulation blade 560. Is done. At this time, the regulating blade 560 is pressed across both end portions 510b and the central portion 510a of the developing roller 510, but the both end portions 510b of the developing roller 510 and the top surface 512a of the convex portion 512 are at a distance from the axis C. Since L is constant, the regulating blade 560 presses the developing roller 510 in a substantially flat state without being largely bent. For this reason, for example, an extremely large gap does not occur between the surface 510d of the developing roller 510 and the regulating blade 560 even in the vicinity of the boundary between the both end portions 510b and the central portion 510a.

また、現像ローラ510の表面510dの凸部512は、凹部としての溝部511を挟んで配置される凸部512の頂面512a同士が軸心Cから一定の距離Lに位置するので、各凸部512の頂面512aは、現像ローラ510から単一の半径にて形成される周面に位置することになる。このため、例えば、担持されたトナー粒子Tの層厚を規制すべく、規制ブレード560の平坦な面が現像ローラ510側に押圧されると、各凸部512の頂面512aに担持されたトナー粒子が同様に押圧されるため、現像ローラ510に担持されるトナー粒子Tの層厚を、現像ローラ510の全域に亘ってほぼ均一にすることが可能である。特に、現像ローラ510の中央部510aとなる凹凸部における凸部512の頂面512aから溝部511の底面511cまでの距離が一定なので、トナー粒子Tの量は溝部511の全域においてほぼ均一に入り込むことになる。このため、現像ローラ510に担持されるトナー粒子Tの量を、現像ローラ510の全域においてほぼ均一にすることが可能である。さらに、凸部512の頂面512aから溝部511の底面511cまでの距離は、体積平均粒径の2倍以下なので、現像ローラ510と規制ブレード560との間に入り込んだトナー粒子が形成するトナー層の層厚を、トナー粒子2個分以下とすることが可能である。すなわち、溝部511に多量のトナー粒子が入り込むことはなく、規制ブレード560に押圧された際には、ほとんどのトナーの粒子が現像ローラ510の表面510d及び規制ブレード560の表面のいずれかと接触する。よって、各トナー粒子Tは同様に押圧されて転動され易く、また、溝部511内にてトナー粒子が滞留しにくいのでトナー粒子Tを均一、且つ良好に帯電させることが可能である。このため、トナー粒子は現像ローラ510に確実に担持されて現像に供されるとともに、現像ローラ510の表面510dと規制ブレード560との間に極端に大きな間隙が生じないことと相俟って、現像器51,52,53,54外にトナー粒子Tが漏れることを防止することが可能である。   Further, the convex portions 512 of the surface 510d of the developing roller 510 are arranged so that the top surfaces 512a of the convex portions 512 arranged with the groove portions 511 as the concave portions are located at a certain distance L from the axis C. The top surface 512 a of 512 is located on the peripheral surface formed with a single radius from the developing roller 510. Therefore, for example, when the flat surface of the regulating blade 560 is pressed toward the developing roller 510 in order to regulate the layer thickness of the carried toner particles T, the toner carried on the top surface 512a of each convex portion 512 Since the particles are similarly pressed, the layer thickness of the toner particles T carried on the developing roller 510 can be made substantially uniform over the entire area of the developing roller 510. In particular, since the distance from the top surface 512a of the convex portion 512 to the bottom surface 511c of the groove portion 511 in the concavo-convex portion that becomes the central portion 510a of the developing roller 510 is constant, the amount of toner particles T enters substantially uniformly throughout the groove portion 511. become. Therefore, the amount of toner particles T carried on the developing roller 510 can be made substantially uniform throughout the developing roller 510. Further, since the distance from the top surface 512a of the convex portion 512 to the bottom surface 511c of the groove portion 511 is not more than twice the volume average particle size, the toner layer formed by the toner particles entering between the developing roller 510 and the regulating blade 560 is formed. The layer thickness of the toner can be less than or equal to two toner particles. That is, a large amount of toner particles do not enter the groove portion 511, and most of the toner particles come into contact with either the surface 510 d of the developing roller 510 or the surface of the regulating blade 560 when pressed by the regulating blade 560. Accordingly, the toner particles T are similarly pressed and rolled easily, and the toner particles do not easily stay in the groove portion 511, so that the toner particles T can be charged uniformly and satisfactorily. For this reason, the toner particles are reliably carried on the developing roller 510 and used for development, and in combination with the fact that no extremely large gap is generated between the surface 510d of the developing roller 510 and the regulating blade 560, It is possible to prevent the toner particles T from leaking outside the developing devices 51, 52, 53, 54.

図10は、トナー粒子を担持した現像ローラに規制ブレードが当接された状態を説明するための図である。   FIG. 10 is a view for explaining a state in which the regulating blade is in contact with the developing roller carrying toner particles.

特に本実施形態の現像ローラ510の溝部511は深さが7μmであり、トナー粒子Tの体積平均粒径と比較すると、ほぼ1倍である。このため、規制ブレード560がゴム製であり現像ローラ510の表面510dの凹凸に沿わされるので、トナー粒子Tを重ねることなく、現像ローラ510表面の全域にトナー1粒に相当する厚みのトナー層を形成することが可能である。このように現像ローラ510の表面510dに1粒厚のトナー層を形成することにより、各々のトナー粒子Tを中央部510aの凸部512と溝部511とを含む全域にて確実に帯電させることが可能であり、現像ローラ510に確実に担持させて、現像時における転写性を向上させ、さらには現像器外へのトナーの漏れも防止することが可能である。   In particular, the groove portion 511 of the developing roller 510 of the present embodiment has a depth of 7 μm, which is almost 1 time as compared with the volume average particle diameter of the toner particles T. For this reason, since the regulating blade 560 is made of rubber and follows the unevenness of the surface 510 d of the developing roller 510, the toner layer having a thickness corresponding to one toner particle on the entire surface of the developing roller 510 without overlapping the toner particles T. Can be formed. By forming a toner layer having a single particle thickness on the surface 510d of the developing roller 510 in this manner, each toner particle T can be reliably charged in the entire region including the convex portion 512 and the groove portion 511 of the central portion 510a. It is possible to reliably carry the toner on the developing roller 510 to improve transferability during development and to prevent toner from leaking outside the developing device.

すなわち、現像ローラ510の表面510dに大きさ、深さ、形状等が不均一な凹凸が形成されていると担持されたトナー粒子のうち深い凹部に入り込んだトナー粒子は転動されにくく帯電されにくい。また、軸方向に所定の間隔を隔てて周方向に沿った溝部が形成されている場合には、感光体20が回転しても溝部と対向する感光体20の軸方向における位置が変化しないため、現像されたトナー像は溝部と対向していた部位のみが濃度が高くなる畏れがある。一方、軸方向に沿って溝部が形成されている場合には、トナー粒子担持ローラの回転方向と溝部との向きがほぼ直交するので、担持されたトナー粒子は転動されにくく帯電されにくい。   That is, if unevenness having a non-uniform size, depth, shape, or the like is formed on the surface 510d of the developing roller 510, the toner particles that enter the deep recesses of the carried toner particles are difficult to roll and are not easily charged. . In addition, when grooves along the circumferential direction are formed at predetermined intervals in the axial direction, the position in the axial direction of the photoconductor 20 facing the groove does not change even when the photoconductor 20 rotates. In the developed toner image, there is a tendency that only the portion facing the groove portion has a high density. On the other hand, when the groove portion is formed along the axial direction, the rotation direction of the toner particle carrying roller and the direction of the groove portion are almost orthogonal to each other, so that the carried toner particles are difficult to roll and are not easily charged.

本実施形態の現像器51,52,53,54及び現像ローラ510によれば、現像ローラ510の表面510dに、軸方向及び周方向に対し傾斜を有し軸方向に等ピッチに螺旋状の溝部511が形成されているので、現像ローラ510の回転に伴ってトナー粒子Tを転動させつつ移動させるため、トナー粒子Tを良好に帯電させることが可能である。また、現像ローラ510の回転に伴って感光体20と溝部511とが対向する位置が軸方向及び周方向に順次変化していくので、現像されたトナー像に濃度ムラが生じることを抑えることが可能である。   According to the developing devices 51, 52, 53, and 54 and the developing roller 510 of the present embodiment, the surface 510d of the developing roller 510 is inclined with respect to the axial direction and the circumferential direction and has a spiral groove portion at an equal pitch in the axial direction. Since 511 is formed, the toner particles T are moved while being rotated as the developing roller 510 rotates, so that the toner particles T can be charged satisfactorily. Further, as the developing roller 510 rotates, the position where the photoconductor 20 and the groove 511 face each other changes sequentially in the axial direction and the circumferential direction, so that it is possible to suppress the occurrence of density unevenness in the developed toner image. Is possible.

また、本実施形態の現像ローラ510は、傾斜の角度が異なる2種類の溝部511a、511bが形成されているので、トナー粒子Tは、溝部511a、511bに沿って2種類の方向に移動されることになる。このため、トナー粒子Tが所定の一方向のみに移動して偏ることを防止することが可能である。さらに、2種類の前記溝部511a、511bは、互いに交差して格子状をなしているので、一旦は一方の溝部511a(511b)に沿って転動し始めたトナー粒子Tが、途中から他方の溝部511b(511a)に沿って転動することが可能である。このため、トナー粒子Tの移動方向が偏ることを、より効果的に抑えることが可能である。   Further, since the developing roller 510 of the present embodiment has two types of groove portions 511a and 511b having different inclination angles, the toner particles T are moved in two types of directions along the groove portions 511a and 511b. It will be. For this reason, it is possible to prevent the toner particles T from moving and being biased in only one predetermined direction. Further, since the two types of the groove portions 511a and 511b intersect each other to form a lattice shape, the toner particles T that have started to roll along the one groove portion 511a (511b) are transferred from the middle to the other. It is possible to roll along the groove part 511b (511a). For this reason, it is possible to more effectively suppress the deviation of the moving direction of the toner particles T.

さらに、2種類の溝部511に囲まれた凸部512の頂面512aが正方形であり、その正方形が有する一方の対角線が周方向に沿わされているので、凸部512は周方向に沿って位置する2つの頂角、及び、軸方向に沿って位置する2つの頂角がいずれも直角となり、2種類の溝部511a,511bは周方向及び軸方向に対して同角度の傾斜を有することになる。このため、トナー粒子Tが周方向及び軸方向に向かって同様に移動し易い構成とすることが可能である。このため、トナー粒子をより均一に転動させて均一に帯電させることが可能である。   Furthermore, since the top surface 512a of the convex portion 512 surrounded by the two types of groove portions 511 is a square, and one diagonal line of the square is along the circumferential direction, the convex portion 512 is positioned along the circumferential direction. The two apex angles and the two apex angles positioned along the axial direction are both right angles, and the two types of grooves 511a and 511b have the same angle of inclination with respect to the circumferential direction and the axial direction. . For this reason, the toner particles T can be easily moved in the circumferential direction and the axial direction as well. For this reason, it is possible to uniformly charge the toner particles by rolling them more uniformly.

また、現像ローラ510の表面に担持されたトナー粒子Tは、規制ブレード560が有するゴム部560aの平面にて、その層厚が規制されるので、現像ローラ510の表面、特に凸部512に担持されたトナー粒子Tが規制ブレード560によって完全に掻き取られることはない。すなわち、現像ローラ510の溝部511にも、凸部512にもトナー粒子Tを担持させた状態にてトナー粒子Tの層厚を規制することが可能である。また、表面510dに担持されたトナー粒子Tは、規制ブレード560が有する平面により押圧されているので、現像ローラ510の表面、規制ブレード560、及び、トナー粒子同士のいずれかとトナー粒子Tとを互いに摩擦させることにより良好に帯電させることが可能である。   Further, the toner particle T carried on the surface of the developing roller 510 has its layer thickness restricted by the plane of the rubber part 560 a of the restriction blade 560, so that the toner particle T is carried on the surface of the developing roller 510, particularly the convex part 512. The toner particles T are not completely scraped off by the regulating blade 560. That is, it is possible to regulate the layer thickness of the toner particles T in a state where the toner particles T are carried on the groove portions 511 and the convex portions 512 of the developing roller 510. Further, since the toner particles T carried on the surface 510d are pressed by the flat surface of the regulating blade 560, any one of the surface of the developing roller 510, the regulating blade 560, and the toner particles and the toner particles T are mutually connected. It is possible to charge well by rubbing.

ところで、レーザビームプリンタは、前述したようにレーザビームを用いて感光体20に潜像を形成し、形成された潜像を現像ローラ510に担持されたトナーにより現像する。このとき、感光体20上に、主走査方向(軸方向)に走査されるレーザビームのON/OFFにより、ドット状潜像が、格子状に区画された領域、所謂スクリーンに形成される。そして、これらドット状潜像により潜像が構成される。   By the way, the laser beam printer forms a latent image on the photoconductor 20 using the laser beam as described above, and develops the formed latent image with toner carried on the developing roller 510. At this time, a dot-like latent image is formed on a so-called screen on the photosensitive member 20 by turning the laser beam scanned in the main scanning direction (axial direction) on and off. These dot-like latent images constitute a latent image.

また、本実施形態のように、明確に区別された溝部(凹部)511と凸部512とを有する現像ローラ510の場合には、たとえば、凸部512より溝部511に、より多くのトナー粒子Tが入り込む畏れがある。この場合には、トナー像において、溝部511により現像された部位と凸部512にて現像された部位とで濃度が異なる畏れがある。特に、文字や線画のように、広い面積を持たない画像では影響は少ないが、写真やイラストなど広い面積を有する画像の場合には濃度のむらが目立ちやすい場合がある。このような現象は、現像ローラ510に形成された溝部511の軸方向におけるピッチが、前述したスクリーンの主走査方向における格子のピッチより大きい場合に、より顕著となる。これは本来同じ濃度にて形成されるべきドットであっても、現像ローラ510の溝部511にて現像されたか、凸部512にて現像されたかによって濃度が相違してしまうからである。   Further, in the case of the developing roller 510 having the groove portion (concave portion) 511 and the convex portion 512 that are clearly distinguished as in this embodiment, for example, more toner particles T are placed in the groove portion 511 than in the convex portion 512. There is a drowning in. In this case, in the toner image, there is a difference in density between the portion developed by the groove portion 511 and the portion developed by the convex portion 512. In particular, an image having no large area, such as a character or a line drawing, has little influence, but in the case of an image having a large area such as a photograph or an illustration, uneven density may be noticeable. Such a phenomenon becomes more prominent when the pitch in the axial direction of the grooves 511 formed in the developing roller 510 is larger than the pitch of the lattice in the main scanning direction of the screen described above. This is because even if the dots should originally be formed with the same density, the density differs depending on whether the dots are developed in the groove 511 of the developing roller 510 or the convex part 512.

このため、本実施形態の現像ローラ510は、写真やイラストなど面積を有する画像を形成する際の格子の最長ピッチより、現像ローラ510に形成された溝部511の軸方向におけるピッチを小さくしている。ここで、写真やイラストなど広い面積を有する画像を形成する際の潜像の主走査方向における格子のピッチは、レーザビームプリンタが形成可能な最高解像度の画像におけるドット間ピッチではない。これは、レーザビームプリンタにて写真やイラストなど広い面積を有する画像を形成する際には、プリンタが有する最高解像度より低い解像度にてドットを形成し、かつ、各ドットに階調性を持たせることにより、全体としての画質を向上させるためである。   For this reason, the developing roller 510 of the present embodiment has a smaller pitch in the axial direction of the grooves 511 formed in the developing roller 510 than the longest pitch of the lattice when forming an image having an area such as a photograph or illustration. . Here, the pitch of the lattice in the main scanning direction of the latent image when forming an image having a large area such as a photograph or illustration is not the pitch between dots in the highest resolution image that can be formed by the laser beam printer. This is because when a laser beam printer forms an image with a large area such as a photograph or illustration, dots are formed at a resolution lower than the maximum resolution of the printer, and each dot has gradation. This is to improve the overall image quality.

図11は、スクリーン及び潜像におけるピッチを説明するための図である。図示するように、例えば、プリンタの最高解像度が600dpi(ピッチ42.5μm)であった場合に、潜像の解像度を600dpiとしてしまうと、ドット状潜像を形成しうる領域が42.5μmピッチの格子状に区画される。このため、各々の区画された領域には、ドット状潜像の有、無でしか階調を表現することができない(図11上段)。   FIG. 11 is a diagram for explaining pitches in the screen and the latent image. As shown in the figure, for example, if the maximum resolution of the printer is 600 dpi (pitch 42.5 μm) and the resolution of the latent image is 600 dpi, the area where the dot-like latent image can be formed is 42.5 μm pitch. Divided into a lattice. For this reason, gradation can be expressed only in each partitioned area with or without a dot-like latent image (the upper part of FIG. 11).

そこで、広い面積を有する画像を形成する際には、例えば、解像度600dpiにおける3つのドット状潜像分を1つのドット状潜像として、解像度600dpiにおいて半導体レーザが3つのドット状潜像分応答可能な時間内においてレーザビームを発光する時間の長さ変化させることにより階調を表現している(図11下段)。この場合には広い面積を有する画像を形成する際の解像度は200dpiとなり、ドット状潜像を形成しうる領域は127.5μmピッチの格子状に区画されることになる。このため、本実施形態の現像ローラ510は、軸方向における溝部511のピッチを80μmとすることにより、200dpi、すなわち、127.5μmピッチの格子状に区画される領域に形成される潜像の各ドット状潜像が、いずれも現像ローラ510の溝部511と凸部512とを含む部位で現像され、現像されたトナー像に濃度ムラが発生することを抑えている。本実施形態においては、レーザビームプリンタの最高解像度を600dpi,写真等の画像を形成する際にドット状潜像を形成可能な、格子状に区画された領域の軸方向におけるピッチを127.5μmとし、現像ローラ510の溝部511の軸方向におけるピッチを80μmとした例について説明したが、これに限らず、現像ローラ510の溝部511の軸方向におけるピッチは、写真等の画像を形成する際の潜像にてドット状潜像が形成される、格子状に区画された領域の軸方向におけるピッチより小さければ構わない。また、特に、隣接する溝部511と凸部512との軸方向の最大距離が、ドット状潜像を形成しうる、格子状に区画され領域より小さい場合には、1つのドット状潜像が、少なくとも1カ所の溝部511と1カ所の凸部512とにて現像されるので、広い面積を有する画像における濃度のむらの発生を効果的に抑制することが可能である。例えば、溝部511の軸方向の最大幅が40μmであり、凸部512の軸方向の最大幅が40μmの場合には、127.5μmピッチの格子状に区画されたドット状潜像を形成しうる領域に、1カ所の溝部511と1カ所の凸部512がいずれも含まれるため、広い面積を有する画像における濃度のむらの発生を効果的に抑制することが可能である。   Therefore, when forming an image having a large area, for example, three dot-like latent images at a resolution of 600 dpi can be used as one dot-like latent image, and the semiconductor laser can respond to three dot-like latent images at a resolution of 600 dpi. The gray scale is expressed by changing the length of time during which the laser beam is emitted within a long time (lower part of FIG. 11). In this case, the resolution when forming an image having a large area is 200 dpi, and the area where the dot-like latent image can be formed is partitioned into a grid of 127.5 μm pitch. For this reason, the developing roller 510 according to the present embodiment is configured such that each pitch of the latent images formed in the lattice-divided region of 200 dpi, that is, 127.5 μm pitch, is set by setting the pitch of the groove portions 511 in the axial direction to 80 μm. The dot-like latent image is developed at a portion including the groove portion 511 and the convex portion 512 of the developing roller 510, and density unevenness is prevented from occurring in the developed toner image. In the present embodiment, the maximum resolution of the laser beam printer is 600 dpi, and the pitch in the axial direction of the area partitioned in a lattice form that can form a dot-like latent image when an image such as a photograph is formed is 127.5 μm. The example in which the pitch in the axial direction of the groove 511 of the developing roller 510 is 80 μm has been described. However, the pitch in the axial direction of the groove 511 in the developing roller 510 is not limited to this. It is only necessary that the pitch is smaller than the pitch in the axial direction of the area partitioned in the form of a lattice where the dot-like latent image is formed by the image. In particular, when the maximum axial distance between the adjacent groove 511 and the convex portion 512 is smaller than a grid-divided region that can form a dot-like latent image, one dot-like latent image is Since development is performed with at least one groove portion 511 and one convex portion 512, it is possible to effectively suppress the occurrence of uneven density in an image having a large area. For example, when the maximum width in the axial direction of the groove portion 511 is 40 μm and the maximum width in the axial direction of the convex portion 512 is 40 μm, dot-like latent images partitioned in a lattice shape with a pitch of 127.5 μm can be formed. Since the region includes both one groove portion 511 and one convex portion 512, it is possible to effectively suppress the occurrence of density unevenness in an image having a large area.

本実施形態においては、2種類の溝部511a,511bに囲まれた凸部512の頂面512aが正方形の例について説明したが、これに限るものではない。図12は、現像ローラの第1変形例を示す図である。図13は、現像ローラの第2変形例を示す図である。図14は、現像ローラの第3変形例を示す図である。   In the present embodiment, the example in which the top surface 512a of the convex portion 512 surrounded by the two types of groove portions 511a and 511b is square has been described, but the present invention is not limited to this. FIG. 12 is a diagram illustrating a first modification of the developing roller. FIG. 13 is a diagram illustrating a second modification of the developing roller. FIG. 14 is a diagram illustrating a third modification of the developing roller.

第1変形例の現像ローラ510では、2種類の溝部511に囲まれた凸部512の頂面512aを菱形とし、各々の前記菱形が有する2本の対角線の一方が周方向に沿うように溝部が形成されている。第1変形例の現像ローラ510においても、凹部は上記のような転造により形成されるので、現像ローラ510の中央部510aにて凹部を挟んで配置されてダイス900が接触しなかった凸部512の頂面512a同士、及び、中央部510aにてダイス900が接触しなかった凸部512の頂面512aと、転造による加工対象とされない両端部510bとは、軸心Cからの距離Lが一定になるように切削されたままであるため軸心Cから等距離に位置している。   In the developing roller 510 of the first modified example, the top surface 512a of the convex portion 512 surrounded by the two types of groove portions 511 is a rhombus, and the groove portions so that one of the two diagonal lines of each rhombus is along the circumferential direction. Is formed. Also in the developing roller 510 of the first modified example, since the concave portion is formed by rolling as described above, the convex portion that is disposed with the concave portion interposed between the central portion 510a of the developing roller 510 and the die 900 is not in contact with it. The top surfaces 512a of 512, the top surface 512a of the convex portion 512 where the die 900 did not contact at the central portion 510a, and the both ends 510b not to be processed by rolling are a distance L from the axis C. Since it has been cut so as to be constant, it is located at an equal distance from the axis C.

このような現像ローラ510によれば、各々の前記菱形が有する2本の対角線の一方が周方向に沿うように溝部511が形成されているので、周方向に沿わされた対角線の一方の頂角からは、2種類の溝部511が軸方向の両端側に同角度の傾斜をもって形成されていることになる。このため、2種類の溝部511に沿って移動されるトナー粒子Tは、軸方向の両端側にほぼ同様に移動され、トナー粒子をムラなく移動させることが可能であることは凸部512の頂面512aが正方形である場合と同じである。更に加えて、頂面512aが菱形をなす凸部512の2本の対角線のうち長い方の対角線が周方向に沿わされている場合には、頂面512aが菱形の凸部512は周方向に沿って位置する2つの頂角が鋭角になり、軸方向に沿って位置する2つの頂角が鈍角となる。このため、トナー粒子が周方向に向かってより移動し易い構成とすることが可能である。   According to such a developing roller 510, since the groove portion 511 is formed so that one of the two diagonal lines of each rhombus is along the circumferential direction, one apex angle of the diagonal line along the circumferential direction. Therefore, two types of groove portions 511 are formed at the same angle on both end sides in the axial direction. For this reason, the toner particles T moved along the two types of groove portions 511 are moved in substantially the same way toward both ends in the axial direction, and it is possible to move the toner particles without unevenness. This is the same as when the surface 512a is square. In addition, when the longer diagonal line of the two diagonal lines of the convex part 512 whose top face 512a forms a rhombus is along the circumferential direction, the convex part 512 whose rhombic top face 512a is in the circumferential direction. Two apex angles positioned along the axis become acute angles, and two apex angles positioned along the axial direction become obtuse angles. For this reason, the toner particles can be configured to move more easily in the circumferential direction.

また、図13に示すように、頂面512aが菱形をなす凸部512の2本の対角線のうち短い方の対角線が周方向に沿わされている場合には、頂面が菱形の凸部は周方向に沿って位置する2つの頂角が鈍角になり、軸方向に沿って位置する2つの頂角が鋭角となる。第2変形例の現像ローラ510においても、凹部は上記のような転造により形成されるので、現像ローラ510の中央部510aにて凹部を挟んで配置されてダイス900が接触しなかった凸部512の頂面512a同士、及び、中央部510aにてダイス900が接触しなかった凸部512の頂面512aと、転造による加工対象とされない両端部510bとは、軸心Cからの距離Lが一定になるように切削されたままであるため軸心Cから等距離に位置している。このため、トナー粒子が軸方向に向かってより移動し易く、現像ローラ510の全域にトナーがより分散される構成とすることが可能である。   Further, as shown in FIG. 13, when the shorter diagonal line of the two diagonal lines of the convex part 512 whose top surface 512a forms a rhombus is along the circumferential direction, the convex part whose top surface is a rhombus Two apex angles located along the circumferential direction are obtuse angles, and two apex angles located along the axial direction are acute angles. Also in the developing roller 510 of the second modified example, since the concave portion is formed by rolling as described above, the convex portion which is disposed with the concave portion interposed between the central portions 510a of the developing roller 510 and the die 900 is not in contact with it. The top surfaces 512a of 512, the top surface 512a of the convex portion 512 where the die 900 did not contact at the central portion 510a, and the both ends 510b not to be processed by rolling are a distance L from the axis C. Since it has been cut so as to be constant, it is located at an equal distance from the axis C. Therefore, the toner particles can be more easily moved in the axial direction, and the toner can be more dispersed throughout the developing roller 510.

本実施形態においては、現像ローラ510の表面に2種類の溝部511a,511bを有する例について説明したが、図14に示す第3変形例のように、溝部511は1種類であっても良い。第3変形例の現像ローラ510においても、凹部は上記のような転造により形成されるので、現像ローラ510の中央部510aにて凹部を挟んで配置されてダイス900が接触しなかった凸部512の表面同士、及び、中央部510aにてダイス900が接触しなかった凸部512の表面と、転造による加工対象とされない両端部510bとは、軸心Cからの距離Lが一定になるように切削されたままであるため軸心Cから等距離に位置している。この場合には、トナー粒子Tを所定方向に転動させて帯電させる効果は有するが、より良好に帯電させるとともに、現像ローラ510の全域にトナー粒子をより分散させる構成としては、2種類の溝部511a,511bを有する上記実施形態の現像ローラ510の方が優れた効果を奏する。   In the present embodiment, the example in which the two types of groove portions 511a and 511b are provided on the surface of the developing roller 510 has been described. However, as in the third modified example illustrated in FIG. Also in the developing roller 510 of the third modified example, since the concave portion is formed by rolling as described above, the convex portion that is arranged with the concave portion in the central portion 510a of the developing roller 510 and the die 900 is not in contact with it. The distance L from the axis C is constant between the surfaces of 512 and the surface of the convex part 512 where the die 900 did not contact at the center part 510a and the both end parts 510b not to be processed by rolling. Thus, it is located at an equal distance from the axis C. In this case, the toner particles T have the effect of being charged by rolling in a predetermined direction. However, there are two types of groove portions as a configuration for better charging and further dispersing the toner particles throughout the entire area of the developing roller 510. The developing roller 510 of the above embodiment having 511a and 511b has an excellent effect.

===その他の実施形態===
以上、上記実施の形態に基づき本発明に係る画像形成装置等を説明したが、上記した発明の実施の形態は、本発明の理解を容易にするためのものであり、本発明を限定するものではない。本発明は、その趣旨を逸脱することなく、変更、改良され得ると共に、本発明にはその等価物が含まれることはもちろんである。
=== Other Embodiments ===
The image forming apparatus and the like according to the present invention have been described above based on the above embodiment. However, the above embodiment of the present invention is for facilitating understanding of the present invention and limits the present invention. is not. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. The image forming apparatus and the like according to the present invention have been described above based on the above embodiment. However, the above embodiment of the present invention is for facilitating understanding of the present invention and limits the present invention. Is not. The present. invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

なお、上記実施の形態において、プリンタが着脱部を複数備えた例を示したが、1つだけ設けられた着脱部に、装着されるべき現像器が挿入されることにより閉止可能な蓋ユニットを備えた構成であっても構わない。また、上記実施形態においては、ロータリー方式の現像装置を備えた画像形成装置を例に説明したが、これに限定されるものではない。例えば、タンデム方式の現像装置を備えた画像形成装置にも、本発明を適用することができる。   In the above embodiment, an example in which the printer includes a plurality of attaching / detaching portions has been described. However, a lid unit that can be closed by inserting a developing device to be attached to only one attaching / detaching portion is provided. You may be the structure provided. In the above-described embodiment, the image forming apparatus including the rotary developing device has been described as an example. However, the present invention is not limited to this. For example, the present invention can be applied to an image forming apparatus provided with a tandem developing device.

なお、上記実施の形態において、像担持体である感光体は、円筒状の導電性基材の外周面に感光層を設けた構成として説明したが、これに限定されるものではない。例えば、ベルト状の導電性基材の表面に感光層を設けて構成した、いわゆる感光ベルトであってもよい。   In the above embodiment, the photoconductor as the image carrier has been described as a configuration in which the photosensitive layer is provided on the outer peripheral surface of the cylindrical conductive base material, but the present invention is not limited to this. For example, a so-called photosensitive belt configured by providing a photosensitive layer on the surface of a belt-like conductive substrate may be used.

===画像形成システム等の構成===
次に、本発明に係る実施の形態の一例である画像形成システムの実施形態について、図面を参照しながら説明する。
=== Configuration of Image Forming System etc. ===
Next, an image forming system according to an embodiment of the present invention will be described with reference to the drawings.

図15は、画像形成システムの外観構成を示した説明図である。画像形成システム700は、コンピュータ702と、表示装置704と、プリンタ10と、入力装置708と、読取装置710とを備えている。   FIG. 15 is an explanatory diagram showing an external configuration of the image forming system. The image forming system 700 includes a computer 702, a display device 704, a printer 10, an input device 708, and a reading device 710.

コンピュータ702は、本実施形態ではミニタワー型の筐体に収納されているが、これに限られるものではない。表示装置704は、CRT(Cathode Ray Tube:陰極線管)やプラズマディスプレイや液晶表示装置等が用いられるのが一般的であるが、これに限られるものではない。プリンタ10は、上記に説明されたプリンタが用いられている。入力装置708は、本実施形態ではキーボード708Aとマウス708Bが用いられているが、これに限られるものではない。読取装置710は、本実施形態ではフレキシブルディスクドライブ装置710AとCD−ROMドライブ装置710Bが用いられているが、これに限られるものではなく、例えばMO(Magneto Optical)ディスクドライブ装置やDVD(Digital Versatile Disk)等の他のものであっても良い。   In this embodiment, the computer 702 is housed in a mini-tower type housing, but is not limited thereto. The display device 704 is generally a CRT (Cathode Ray Tube), a plasma display, a liquid crystal display device, or the like, but is not limited thereto. As the printer 10, the printer described above is used. In this embodiment, the input device 708 uses a keyboard 708A and a mouse 708B, but is not limited thereto. In this embodiment, the reading device 710 uses a flexible disk drive device 710A and a CD-ROM drive device 710B. However, the reading device 710 is not limited to this. Disk) etc. may be used.

図16は、図15に示した画像形成システムの構成を示すブロック図である。コンピュータ702が収納された筐体内にRAM等の内部メモリ802と、ハードディスクドライブユニット804等の外部メモリがさらに設けられている。   FIG. 16 is a block diagram showing a configuration of the image forming system shown in FIG. An internal memory 802 such as a RAM and an external memory such as a hard disk drive unit 804 are further provided in a housing in which the computer 702 is housed.

なお、以上の説明においては、プリンタ10が、コンピュータ702、表示装置704、入力装置708、及び、読取装置710と接続されて画像形成システムを構成した例について説明したが、これに限られるものではない。例えば、画像形成システムが、コンピュータ702とプリンタ10から構成されても良く、画像形成システムが表示装置704、入力装置708及び読取装置710のいずれかを備えていなくても良い。   In the above description, an example in which the printer 10 is connected to the computer 702, the display device 704, the input device 708, and the reading device 710 to configure the image forming system has been described. However, the present invention is not limited to this. Absent. For example, the image forming system may include the computer 702 and the printer 10, and the image forming system may not include any of the display device 704, the input device 708, and the reading device 710.

また、例えば、プリンタ10が、コンピュータ702、表示装置704、入力装置708、及び、読取装置710のそれぞれの機能又は機構の一部を持っていても良い。一例として、プリンタ10が、画像処理を行う画像処理部、各種の表示を行う表示部、及び、デジタルカメラ等により撮影された画像データを記録した記録メディアを着脱するための記録メディア着脱部等を有する構成としても良い。   For example, the printer 10 may have a part of each function or mechanism of the computer 702, the display device 704, the input device 708, and the reading device 710. As an example, the printer 10 includes an image processing unit that performs image processing, a display unit that performs various displays, a recording medium attachment / detachment unit for attaching / detaching a recording medium that records image data captured by a digital camera or the like. It is good also as a structure to have.

このようにして実現された画像形成システムは、システム全体として従来システムよりも優れたシステムとなる。 The image forming system realized in this way is a system superior to the conventional system as a whole system.

プリンタを構成する主要構成要素を示した図である。 FIG. 2 is a diagram illustrating main components constituting a printer. プリンタに備えられた制御ユニットの構成を説明するための図である。 It is a figure for demonstrating the structure of the control unit with which the printer was equipped. イエロー現像器の斜視図である。 It is a perspective view of a yellow developing device. イエロー現像器の主要構成要素を示した断面図である。 It is sectional drawing which showed the main components of the yellow developing device. 現像ローラが取り外された現像器を示す斜視図である。 FIG. 6 is a perspective view showing a developing device with a developing roller removed. 現像ローラの表面形状を説明するための概念図である。 It is a conceptual diagram for demonstrating the surface shape of a developing roller. 現像ローラを、軸を通る平面で切断した際の断面を説明するための断面図である。 It is sectional drawing for demonstrating the cross section at the time of cut | disconnecting a developing roller by the plane which passes along an axis | shaft. 現像ローラが転造により形成される様子を説明するための図である。 It is a figure for demonstrating a mode that a developing roller is formed by rolling. 現像ローラが形成される手順を示す図である。 It is a figure which shows the procedure in which a developing roller is formed. トナー粒子を担持した現像ローラに規制ブレードが当接された状態を説明するための図である。 FIG. 6 is a diagram for explaining a state in which a regulating blade is in contact with a developing roller carrying toner particles. スクリーン及び潜像における解像度を説明するための図である。 It is a figure for demonstrating the resolution in a screen and a latent image. 現像ローラの第1変形例を示す図である。 It is a figure which shows the 1st modification of a developing roller. 現像ローラの第2変形例を示す図である。 It is a figure which shows the 2nd modification of a developing roller. 現像ローラの第3変形例を示す図である。 It is a figure which shows the 3rd modification of a developing roller. 画像形成システムの外観構成を示した説明図である。 1 is an explanatory diagram showing an external configuration of an image forming system. 図15に示した画像形成システムの構成を示すブロック図である。 FIG. 16 is a block diagram illustrating a configuration of the image forming system illustrated in FIG. 15.

符号の説明Explanation of symbols

10 プリンタ、20 感光体、30 帯電ユニット、40 露光ユニット、
50 現像器保持ユニット、50a、50b、50c、50d 着脱部、
50e 中心軸、51 ブラック現像器、52 マゼンタ現像器、
53 シアン現像器、54 イエロー現像器、60 一次転写ユニット、
70 中間転写体、75 クリーニングユニット、76 クリーニングブレード、
80 二次転写ユニット、90 定着ユニット、92 給紙トレイ、
94 給紙ローラ、95 表示ユニット、96 レジローラ、100 制御ユニット、
101 メインコントローラ、102 ユニットコントローラ、111 CPU、

112 インターフェイス、113 画像メモリ、116 メモリ、120 CPU、 112 interfaces, 113 image memory, 116 memory, 120 CPU,
509 未転造加工現像ローラ、510 現像ローラ、510a 中央部、 509 Unrolled developing roller, 510 developing roller, 510a center,
510b 端部(両端部)、510c 段部、510d 表面、511 溝部(凹部)、 510b ends (both ends), 510c steps, 510d surface, 511 grooves (recesses),
511a 一方の溝部(凹部)、511b 他方の溝部(凹部)、511c 底面、 511a One groove (recess), 511b The other groove (recess), 511c bottom surface,
511d 傾斜部分、512 凸部、512a 頂面、513 フランジ、 511d inclined part, 512 convex part, 512a top surface, 513 flange,
513a フランジ本体、513b 軸部、515 円筒部材、520 上シール、 513a Flange body, 513b Shaft, 515 Cylindrical member, 520 Top seal,
522 シール支持板金、524 シール付勢部材、527 端部シール、 522 seal support sheet metal, 524 seal urging member, 527 end seal,
530 トナー収容部、530a 第一トナー収容部、530b 第二トナー収容部、 530 Toner storage unit, 530a First toner storage unit, 530b Second toner storage unit,
540 ハウジング、542 上ハウジング部、544 下ハウジング部、 540 housing, 542 upper housing part, 544 lower housing part,
545 仕切り壁、550 トナー供給ローラ、550a ローラ部、 545 Partition wall, 550 toner supply roller, 550a roller part,
550b 軸体、560 規制ブレード、560a ゴム部、560b ゴム支持部、 550b shaft body, 560 regulation blade, 560a rubber part, 560b rubber support part,
562 ブレード支持板金、570 ブレード裏部材、572 開口、 562 blade support sheet metal, 570 blade back member, 572 opening,
700 画像形成システム、702 コンピュータ、704 表示装置、 700 image formation system, 702 computer, 704 display device,
708 入力装置、708A キーボード、708B マウス、710 読取装置、 708 input device, 708A keyboard, 708B mouse, 710 reader,
710A フレキシブルディスクドライブ装置、 710A flexible disk drive device,
710B CD−ROMドライブ装置、 710B CD-ROM drive device,
802 内部メモリ、804 ハードディスクドライブユニット、 802 internal memory, 804 hard disk drive unit,
900 ダイス、900a 刃、C 軸心、T トナー(トナー粒子) 10 printer, 20 photoconductor, 30 charging unit, 40 exposure unit, 900 die, 900a blade, C axis, T toner (toner particle) 10 printer, 20 photoconductor, 30 charging unit, 40 exposure unit,
50 Developer holding unit, 50a, 50b, 50c, 50d Detachable part, 50 Developer holding unit, 50a, 50b, 50c, 50d Detachable part,
50e central axis, 51 black developer, 52 magenta developer, 50e central axis, 51 black developer, 52 magenta developer,
53 Cyan developer, 54 Yellow developer, 60 Primary transfer unit, 53 Cyan developer, 54 Yellow developer, 60 Primary transfer unit,
70 intermediate transfer body, 75 cleaning unit, 76 cleaning blade, 70 intermediate transfer body, 75 cleaning unit, 76 cleaning blade,
80 secondary transfer unit, 90 fixing unit, 92 paper feed tray, 80 secondary transfer unit, 90 fixing unit, 92 paper feed tray,
94 paper feed roller, 95 display unit, 96 registration roller, 100 control unit, 94 paper feed roller, 95 display unit, 96 registration roller, 100 control unit,
101 main controller, 102 unit controller, 111 CPU, 101 main controller, 102 unit controller, 111 CPU,
112 interface, 113 image memory, 116 memory, 120 CPU, 112 interface, 113 image memory, 116 memory, 120 CPU,
509 Non-rolled processing developing roller, 510 developing roller, 510a central portion, 509 Non-rolled processing developing roller, 510 developing roller, 510a central portion,
510b end (both ends), 510c step, 510d surface, 511 groove (concave), 510b end (both ends), 510c step, 510d surface, 511 groove (concave),
511a One groove (recess), 511b The other groove (recess), 511c Bottom surface, 511a One groove (recess), 511b The other groove (recess), 511c Bottom surface,
511d Inclined portion, 512 convex portion, 512a top surface, 513 flange, 511d Inclined portion, 512 convex portion, 512a top surface, 513 flange,
513a Flange body, 513b shaft, 515 cylindrical member, 520 upper seal, 513a Flange body, 513b shaft, 515 cylindrical member, 520 upper seal,
522 seal support sheet metal, 524 seal urging member, 527 end seal, 522 seal support sheet metal, 524 seal urging member, 527 end seal,
530 toner container, 530a first toner container, 530b second toner container, 530 toner container, 530a first toner container, 530b second toner container,
540 housing, 542 upper housing part, 544 lower housing part, 540 housing, 542 upper housing part, 544 lower housing part,
545 partition wall, 550 toner supply roller, 550a roller section, 545 partition wall, 550 toner supply roller, 550a roller section,
550b shaft body, 560 regulating blade, 560a rubber part, 560b rubber support part, 550b shaft body, 560 regulating blade, 560a rubber part, 560b rubber support part,
562 blade support sheet metal, 570 blade backing member, 572 opening, 562 blade support sheet metal, 570 blade backing member, 572 opening,
700 image forming system, 702 computer, 704 display device, 700 image forming system, 702 computer, 704 display device,
708 input device, 708A keyboard, 708B mouse, 710 reader, 708 input device, 708A keyboard, 708B mouse, 710 reader,
710A flexible disk drive device, 710A flexible disk drive device,
710B CD-ROM drive device, 710B CD-ROM drive device,
802 internal memory, 804 hard disk drive unit, 802 internal memory, 804 hard disk drive unit,
900 dies, 900a blade, C axis, T toner (toner particles) 900 dies, 900a blade, C axis, T toner (toner particles)

Claims (16)

  1. 像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、
    前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、
    を有し、
    前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、
    格子は、軸方向において複数種類のピッチで形成可能であり、
    前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とする現像装置。
    A container for storing toner particles for developing the latent image carried on the image carrier;
    A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis; A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis;
    Have Have
    The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern, The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern,
    The lattice can be formed at a plurality of pitches in the axial direction, The lattice can be formed at a plurality of pitches in the axial direction,
    The developing device according to claim 1, wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice . The developing device according to claim 1, wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice .
  2. 請求項1に記載の現像装置において、
    前記凹部は、軸方向に等ピッチに配置されて螺旋状に形成されていることを特徴とする現像装置。
    The developing device according to claim 1,

    The developing device is characterized in that the concave portions are arranged in an axial direction at an equal pitch and are formed in a spiral shape. The developing device is characterized in that the concave portions are arranged in an axial direction at an equal pitch and are formed in a spiral shape.
  3. 請求項2に記載の現像装置において、
    前記凹部は、軸方向及び周方向に対し傾斜角度を異ならせて2種類形成されていることを特徴とする現像装置。
    The developing device according to claim 2,
    2. The developing device according to claim 1, wherein the concave portion is formed in two types with different inclination angles with respect to the axial direction and the circumferential direction.
  4. 請求項1乃至請求項3のいずれかに記載の現像装置において、
    前記凹凸部における凸部の頂面から凹部の底面までの距離は一定であることを特徴とする現像装置。 A developing apparatus characterized in that the distance from the top surface of the convex portion to the bottom surface of the concave portion in the concave-convex portion is constant. The developing device according to any one of claims 1 to 3, The developing device according to any one of claims 1 to 3,
    The developing device according to claim 1, wherein a distance from a top surface of the convex portion to a bottom surface of the concave portion in the concave and convex portion is constant. The developing device according to claim 1, wherein a distance from a top surface of the convex portion to a bottom surface of the concave portion in the concave and convex portion is constant.
  5. 請求項4に記載の現像装置において、
    前記凹凸部における凸部の頂面から凹部の底面までの距離は、前記トナー粒子の体積平均粒径の2倍以下であることを特徴とする現像装置。
    The developing device according to claim 4,

    The developing device according to claim 1, wherein a distance from the top surface of the convex portion to the bottom surface of the concave portion is not more than twice the volume average particle diameter of the toner particles. The developing device according to claim 1, wherein a distance from the top surface of the convex portion to the bottom surface of the concave portion is not more than twice the volume average particle diameter of the toner particles.
  6. 請求項3乃至請求項5のいずれかに記載の現像装置において、
    前記2種類の前記凹部は、互いに交差して格子状をなしていることを特徴とする現像装置。
    The developing device according to any one of claims 3 to 5,
    The developing device according to claim 2, wherein the two types of concave portions intersect each other to form a lattice shape.
  7. 請求項6に記載の現像装置において、
    前記凹部に囲まれた凸部の頂面が菱形であることを特徴とする現像装置。 A developing apparatus characterized in that the top surface of the convex portion surrounded by the concave portion is rhombic. The developing device according to claim 6, The developing device according to claim 6,
    The developing device according to claim 1, wherein the top surface of the convex portion surrounded by the concave portion is a rhombus. The developing device according to claim 1, wherein the top surface of the convex portion surrounded by the concave portion is a rhombus.
  8. 請求項7に記載の現像装置において、
    各々の前記菱形の前記凸部の頂面が有する2本の対角線の一方が周方向に沿うように、前記2種類の前記凹部が形成されていることを特徴とする現像装置。
    The developing device according to claim 7,
    2. The developing device according to claim 1, wherein the two types of the concave portions are formed so that one of two diagonal lines of the top surface of the convex portion of each of the rhombuses is along a circumferential direction.
  9. 請求項8に記載の現像装置において、
    前記凸は、前記2本の対角線のうち長い方の対角線が周方向に沿わされていることを特徴とする現像装置。
    The developing device according to claim 8, wherein
    The developing device is characterized in that the longer diagonal line of the two diagonal lines extends along the circumferential direction.
  10. 請求項6に記載の現像装置において、
    前記凹部に囲まれた凸部の頂面が正方形状であることを特徴とする現像装置。
    The developing device according to claim 6,
    A developing device characterized in that the top surface of the convex portion surrounded by the concave portion is square.
  11. 請求項1乃至請求項10のいずれかに記載の現像装置において、
    前記凸部は、前記トナー粒子を担持するための表面を有することを特徴とする現像装置。
    The developing device according to any one of claims 1 to 10,
    The developing device, wherein the convex portion has a surface for supporting the toner particles.
  12. 請求項1乃至請求項11のいずれかに記載の現像装置において、
    前記トナー粒子担持ローラに担持された前記トナー粒子の層厚を規制するための層厚規制部材を有し、

    前記表面に担持された前記トナー粒子は、前記層厚規制部材が有する平面により押圧されて、層厚が規制されることを特徴とする現像装置。 A developing apparatus characterized in that the toner particles supported on the surface are pressed by a flat surface of the layer thickness regulating member to regulate the layer thickness. The developing device according to any one of claims 1 to 11, The developing device according to any one of claims 1 to 11,
    A layer thickness regulating member for regulating the layer thickness of the toner particles carried on the toner particle carrying roller; A layer thickness regulating member for regulating the layer thickness of the toner particles carried on the toner particle carrying roller;
    The developing device according to claim 1, wherein the toner particles carried on the surface are pressed by a plane of the layer thickness regulating member to regulate the layer thickness. The developing device according to claim 1, wherein the toner particles carried on the surface are pressed by a plane of the layer thickness regulating member to regulate the layer thickness.
  13. 像担持体に担持された潜像を現像するためのトナー粒子を担持するための表面に、凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置し、
    前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、 The latent image has a dot-shaped latent image formed in a region partitioned in a grid pattern.
    格子は、軸方向において複数種類のピッチで形成可能であり、 The grid can be formed at multiple pitches in the axial direction.
    前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とするトナー粒子担持ローラ。 A toner particle-supporting roller characterized in that the pitch of the recess in the axial direction is shorter than the longest pitch among a plurality of types of pitches in the lattice . The surface for carrying toner particles for developing the latent image carried on the image carrier has a concavo-convex part, and the top surface of the convex part arranged with the concave part of the concavo-convex part from the axial center Located at a certain distance, The surface for carrying toner particles for developing the latent image carried on the image carrier has a concavo-convex part, and the top surface of the convex part arranged with the concave part of the concavo-convex part from the axial center Located at a certain distance,
    The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern, The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern,
    The lattice can be formed at a plurality of pitches in the axial direction, The lattice can be formed at a plurality of pitches in the axial direction,
    The toner particle carrying roller , wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice . The toner particle carrying roller , wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice .
  14. 像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、
    前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、
    を有する現像装置を用いて画像を形成する画像形成装置であって、
    前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、
    格子は、軸方向において複数種類のピッチで形成可能であり、

    前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とする画像形成装置。 An image forming apparatus characterized in that the pitch of the recess in the axial direction is shorter than the longest pitch among a plurality of types of pitches in the lattice . A container for storing toner particles for developing the latent image carried on the image carrier; A container for storing toner particles for developing the latent image carried on the image carrier;
    A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis; A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis;
    An image forming apparatus for forming an image using a developing device having An image forming apparatus for forming an image using a developing device having
    The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern, The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern,
    The lattice can be formed at a plurality of pitches in the axial direction, The lattice can be formed at a plurality of pitches in the axial direction,
    The pitch of the said recessed part in the said axial direction is shorter than the longest pitch among several types of pitches in the said grating | lattice, The image forming apparatus characterized by the above-mentioned . The pitch of the said recessed part in the said axial direction is shorter than the longest pitch among several types of pitches in the said grating | lattice, The image forming apparatus characterized by the above-mentioned .
  15. コンピュータ、及び、
    前記コンピュータに接続され、像担持体に担持された潜像を現像するためのトナー粒子を収容する収容部と、
    前記トナー粒子を担持するための表面に凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置するトナー粒子担持ローラと、
    を有する現像装置を用いて画像を形成する画像形成装置、
    を有する画像形成システムであって、
    前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、

    格子は、軸方向において複数種類のピッチで形成可能であり、 The grid can be formed at multiple pitches in the axial direction.
    前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いことを特徴とする画像形成システム。 An image forming system characterized in that the pitch of the recess in the axial direction is shorter than the longest pitch among a plurality of types of pitches in the lattice . Computer and Computer and
    A storage unit connected to the computer and storing toner particles for developing a latent image carried on the image carrier; A storage unit connected to the computer and storing toner particles for developing a latent image carried on the image carrier;
    A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis; A toner particle carrying roller having a concavo-convex portion on a surface for carrying the toner particles, and a top surface of the convex portion disposed across the concave portion of the concavo-convex portion is located at a certain distance from the axis;
    An image forming apparatus for forming an image using a developing device having An image forming apparatus for forming an image using a developing device having
    An image forming system comprising: An image forming system comprising:
    The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern, The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern,
    The lattice can be formed at a plurality of pitches in the axial direction, The lattice can be formed at a plurality of pitches in the axial direction,
    An image forming system , wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice . An image forming system , wherein a pitch of the recesses in the axial direction is shorter than a longest pitch among a plurality of types of pitches in the lattice .
  16. 像担持体に担持された潜像を現像するためのトナー粒子を担持するための表面に、凹凸部を有し、前記凹凸部の凹部を挟んで配置される凸部の頂面が軸心から一定の距離に位置し、
    前記潜像は、格子状に区画された領域に形成されたドット状潜像を有し、
    格子は、軸方向において複数種類のピッチで形成可能であり、

    前記凹部の、前記軸方向におけるピッチは、前記格子における複数種類のピッチのうち最長ピッチより短いトナー粒子担持ローラの製造方法であって、 The pitch of the recess in the axial direction is a method for manufacturing a toner particle-supporting roller shorter than the longest pitch among a plurality of types of pitches in the lattice.
    円筒形状の円筒部材の両端部に軸を有するフランジを取り付けるステップと、 Steps to attach flanges with shafts to both ends of a cylindrical member,
    前記フランジが取り付けられた前記円筒部材を、軸を中心として回転させつつ、前記円筒部材の表面を前記軸と同心状になるように切削するステップと、 A step of cutting the surface of the cylindrical member so as to be concentric with the shaft while rotating the cylindrical member to which the flange is attached about a shaft.
    互いに平行に配置され、互いに異なる2種類の螺旋状の溝をそのピッチが前記最長ピッチよりも短くなるように形成するための2つのダイスを回転させ、切削された前記円筒部材を回転させつつ前記2つのダイス間をそれら軸方向に沿って軸方向に移動させて、前記円筒部材の表面に前記ダイスが押圧されることにより、前記円筒部材の表面に凹設される凹部と、前記ダイスに接触しない表面を有する凸部とを形成するステップと、 The two dies for forming two types of spiral grooves arranged parallel to each other and different from each other so that the pitch is shorter than the longest pitch are rotated, and the cut cylindrical member is rotated while the above-mentioned cylinder member is rotated. By moving between the two dies in the axial direction along their axial directions and pressing the dies against the surface of the cylindrical member, the recesses recessed in the surface of the cylindrical member come into contact with the dies. Steps to form a convex with no surface,
    を有することを特徴とするトナー粒子担持ローラの製造方法。 A method for producing a toner particle-supporting roller, which comprises. The surface for carrying toner particles for developing the latent image carried on the image carrier has a concavo-convex part, and the top surface of the convex part arranged with the concave part of the concavo-convex part from the axial center Located at a certain distance, The surface for carrying toner particles for developing the latent image carried on the image carrier has a concavo-convex part, and the top surface of the convex part arranged with the concave part of the concavo-convex part from the axial center Located at a certain distance,
    The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern, The latent image has a dot-like latent image formed in an area partitioned in a lattice pattern,
    The lattice can be formed at a plurality of pitches in the axial direction, The lattice can be formed at a plurality of pitches in the axial direction,
    The pitch of the recesses in the axial direction is a manufacturing method of a toner particle carrying roller shorter than the longest pitch among a plurality of types of pitches in the lattice, The pitch of the recesses in the axial direction is a manufacturing method of a toner particle carrying roller shorter than the longest pitch among a plurality of types of pitches in the lattice,
    Attaching flanges having shafts to both ends of a cylindrical member having a cylindrical shape; Attaching flanges having shafts to both ends of a cylindrical member having a cylindrical shape;
    Cutting the surface of the cylindrical member to be concentric with the shaft while rotating the cylindrical member to which the flange is attached; Cutting the surface of the cylindrical member to be concentric with the shaft while rotating the cylindrical member to which the flange is attached;
    Are arranged parallel to each other, by rotating the two dice for the pitch is formed to be shorter than the longest pitch two different helical grooves to each other, while rotating the cylindrical member is cut the When the die is pressed against the surface of the cylindrical member by moving between the two dies in the axial direction along the axial direction, the concave portion formed in the surface of the cylindrical member is brought into contact with the die. Forming a convex portion having a surface that does not, Are arranged parallel to each other, by rotating the two dice for the pitch is formed to be shorter than the longest pitch two different spiral grooves to each other, while rotating the cylindrical member is cut the When the die is pressed against the surface of the Forming a convex portion having a surface that does not, cylindrical member by moving between the two dies in the axial direction along the axial direction, the concave portion formed in the surface of the cylindrical member is brought into contact with the die.
    A method for producing a toner particle carrying roller, comprising: A method for producing a toner particle carrying roller, comprising:
JP2005317375A 2005-10-31 2005-10-31 Developing device, toner particle carrying roller, image forming apparatus, image forming system, and toner particle supply roller manufacturing method Expired - Fee Related JP4692224B2 (en)

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