JP3653805B2 - Cylindrical substrate coating method and apparatus - Google Patents

Description

【００３８】
表１に示すように、作用角θ＝５〜８５度の範囲では、分離は良好であり、振動等が発生せず、ホコリ、ゴミ、キズ等の塗膜欠陥も生じず、塗布性の良好な塗布ドラムが得られた。しかも長時間、多数本の安定な連続塗布や完全自動化ができるため、ホコリ、ゴミ等が混入せず高品質かつ高信頼性な製品が可能となった。
【００３９】
（実施例２）
さらに、本発明の実施例の実験例（実施例２という）について説明すると、図２の逐次連続塗布装置で塗布、分離を行い、下記の表２に示す如く作用角θを変えた。即ち鏡面加工を施した直径８０ｍｍ、高さ３５５ｍｍ、２８３ｇのアルミニウムドラム支持体上に、下記の如く各々塗布液組成物▲１▼ＵＣＬ−３▲２▼ＣＧＬ−３及び▲３▼ＣＴＬ−２を調製し、スライドホッパー型の塗布装置ユニットＡ（▲１▼ＵＣＬ−３用）、同塗布装置のユニットＢ（▲２▼ＣＧＬ−３用）、同塗布装置のユニットＣ（▲３▼ＣＴＬ−２用）にて、それぞれ乾燥膜厚１．０μｍ、２．２μｍ及び２３μｍになるように３層の逐次重層塗布、分離し、感光体ドラムを作成すると共に分離状態を観察した。
【００４０】

上記塗布液組成物（固形分については固形分重量比ＣＧＭ−３：ＫＲ−５２４０＝２：１に固定）をサンドミルを用いて１７時間分散したもの。
【００４１】
▲３▼ＣＴＬ−２塗布液組成物
ＣＴＭ−２ ５ｋｇ
ポリカーボネート（Ｚ−２００ 三菱瓦斯化学社製） ５．６ｋｇ
１，２−ジクロロエタン ２８ｌ
固形分については固形分重量比ＣＴＭ−１：Ｚ−２００＝０．８９：１に固定した。
【００４２】
ここで、上記のＣＧＭ−３とＣＴＭ−２の化学式を下記に示す。
【００４３】
【化１】

【００４４】
【化２】

【００４５】
その結果を表２に示す。
【００４６】
【表２】

【００４７】
本発明の如くの作用角θは５〜８５度の範囲で、分離は良好であり、振動等が発生せず、ホコリ、ゴミ、キズ等の塗膜欠陥も生ぜず、塗布性の良好なドラムが得られた。しかも長時間、多数本の安定な連続塗布や完全自動化ができるため、ホコリ、ゴミ等が混入せず高品質かつ高信頼性ある製品が可能となった。
【００４８】
得られた感光体Ｎｏ．２−１〜Ｎｏ．２−３をコニカ社製Ｕ−ＢＩＸ３０３５複写機で実写したところ画像ムラ、濃度ムラ、画像欠陥（黒ポチ、白ポチ、ゴミ、スジ）等がなく良好であった。
【００４９】
【発明の効果】
以上のように、被分離の円筒状基材に所定の作用角で垂直力と水平力を同時に与え分離するので、円筒状基材に強い力がかからず傷や変形を与えないで確実に分離でき、分離する時の振動や衝撃が下方の円筒状基材に伝達しなくなった。
【図面の簡単な説明】
【図１】塗布装置の構成を示す斜視図である。
【図２】塗布装置の他の実施例を示す斜視図である。
【図３】上記塗布手段の斜視図である。
【図４】分離排出手段の説明図である。
【図５】分離排出手段の各種実施例を示す斜視図である。
【図６】円筒状基材の分離力の説明図である。
【符号の説明】
１，１Ａ，１Ｂ，１Ｃ，１Ｄ 円筒状基材（ドラム，感光体ドラム）
４ 供給管
１０ 供給手段
１１ 取付け部
１２ 可動テーブル
１３ 駆動部
１４ 昇降部
１５ ハンド部
２０ 搬送手段
２１，２２ 把持部
３０，３０Ａ，３０Ｂ，３０Ｃ 位置決め手段
４０，４０Ａ，４０Ｂ，４０Ｃ 塗布手段（スライドホッパ型の塗布手段）
４１ 塗布ヘッド（コーター、ホッパー塗布面）
４２ 塗布液流出口
４３ 塗布液分配スリット（スリット）
４４ 塗布液分配室
４５ 塗布液スライド面（スライド面）
４６ 空気抜き部材
４７ 開閉弁
５０，５０Ａ，５０Ｂ，５０Ｃ 乾燥手段
５１ 乾燥フード
５３ 乾燥器
６０ 分離排出手段（分離器）
６１ 移動ロボット
６２ エアーシリンダー
６３，６５，６７ 上把持子（上チャック）
６４，６６，６８ 下把持子（下チャック）
Ｆ 合成力
Ｆ１ 水平力
Ｆ２ 垂直力
θ 作用角
Ｐ 作用点[0001]
[Industrial application fields]
In the present invention, a cylindrical base material is sequentially separated after a coating liquid is continuously applied to and dried on a plurality of cylindrical base materials (also referred to as drums and photosensitive drums) conveyed in a vertical column. The present invention relates to a cylindrical substrate coating method and apparatus, and more particularly to separation after coating and drying a photosensitive drum of a cylindrical substrate for electrophotography.
[0002]
[Prior art]
There are various methods such as a spray coating method, a dip coating method, a blade coating method, and a roll coating method for uniformly coating the outer surface of the cylindrical substrate with a thin film. In particular, for a uniform coating with a thin film such as an electrophotographic photosensitive drum, a coating apparatus having excellent productivity has been studied. However, the conventional coating method and coating apparatus for a cylindrical substrate have problems that a uniform coating film cannot be obtained and productivity is poor.
[0003]
In the spray coating method, since the solvent evaporates before the coating droplets ejected from the spray gun reach the outer peripheral surface of the cylindrical substrate having a continuous surface formed endlessly, the solid content concentration of the coating droplets When the viscosity of the coated droplet increases and the droplet reaches the surface as a result, the droplet does not spread sufficiently on the surface, or has dried and solidified. Since the film adheres to the surface, the coated surface with good smoothness cannot be obtained. In addition, the reach of the liquid droplets to the cylindrical base material is not 100%, and there is a loss of coating liquid or it is partially non-uniform so that it is very difficult to control the film thickness. However, since stringing may occur, there are limitations on the solvent and resin used.
[0004]
In the blade coating method and the roll coating method, for example, a blade or a roll is disposed in the length direction of the cylindrical base material, the cylindrical base material is rotated, coating is performed, and the cylindrical base material is rotated once. The roll is retracted. However, when the blade or roll is retracted, there is a disadvantage that a part of the coating film thickness is thicker than the other part due to the viscosity of the coating liquid, and a uniform coating film cannot be obtained.
[0005]
In the dip coating method, the smoothness of the coating liquid surface and the poor uniformity of the coating film as described above are improved. However, control of the coating film thickness is governed by coating liquid properties such as viscosity, surface tension, density, temperature, and coating speed, and adjustment of the coating liquid properties is very important. Also, the coating speed is low, and a liquid amount of a certain amount or more is necessary to fill the coating liquid tank. In the case of further layering, there are disadvantages such that the lower layer components are dissolved and the coating solution tank is easily contaminated.
[0006]
Therefore, as described in Japanese Patent Application Laid-Open No. 58-189061, a circular amount regulation type coating apparatus (including a slide hopper type coating apparatus) has been developed. This slide hopper type coating device encircles the circumference of a cylindrical base material having a continuous peripheral surface formed endlessly while continuously moving in the longitudinal direction of the cylindrical base material. The coating apparatus is for applying a coating liquid. The coating apparatus has an annular coating liquid reservoir chamber, a supply port for supplying the coating liquid from the outside to a part of the coating liquid reservoir chamber, and the coating liquid reservoir chamber. A coating liquid distribution slit that opens inward, and the coating liquid that has flowed out of the slit is allowed to flow down on the coating liquid slide surface that is inclined obliquely downward, and the hopper coating surface at the lower end of the coating liquid slide surface and the cylindrical base A bead is formed in a slight gap portion with the material and applied to the outer peripheral surface of the cylindrical base material as the cylindrical base material moves. By using this slide hopper type coating apparatus, coating can be performed with a small amount of liquid, the coating liquid is not contaminated, and high productivity and easy film thickness control can be achieved.
[0007]
When the cylindrical base material is continuously applied and dried as in the above apparatus, when the cylindrical base material is placed on the side end face and stacked and dried, The side end portions of the stacked cylindrical base materials are in a state where the coating films are connected. These are separated upward to separate them. After that, the cylindrical base material was placed on the mounting member or the like at the lower end.
[0008]
In addition, techniques for coating and separating in a manner in which a cylindrical base material is placed on top of each other via a spacer are disclosed in Japanese Patent Application Laid-Open Nos. 61-120661, 61-120663, and 61-120664. However, when vibration is generated by the separating means, the vibration is transmitted through the cylindrical base material under the continuous application, and the coating film error at the time of application increases.
[0009]
[Problems to be solved by the invention]
As described above, since the coating liquid flows down on the drum immediately after the coating of the coating liquid, it is overwhelmingly better to set the coated film by immediately putting it in the drying process.
[0010]
However, when the drum is connected by the coating film as described above, there is a defect that when the drum is pulled away at a higher speed than the lower drum adjacent in the traveling direction, the drum is pulled up to the adjacent lower drum. .
[0011]
The method of setting the coating film at an early stage using a dryer immediately after coating is very advantageous for the coating film as described above. However, even if the drum immediately after coating is actively dried using a drier or the like, there may be a case where sufficient drying cannot be achieved until the separation position due to the characteristics of the coating solution and the required film thickness. When the degree of drying did not reach the dryness of the touch level, the outside of the cylindrical base material (drum) could not be held directly, and it was difficult to separate and discharge.
[0012]
The present invention has been made in view of such problems, and the coated cylindrical substrate can be reliably separated without causing vibration, displacement, scratches or deformation in the cylindrical substrate or its application portion. An object of the present invention is to provide a cylindrical substrate coating method and apparatus that can be used.
[0013]
[Means for Solving the Problems]
The above object can be achieved by the following means. That is,
(1) A coating liquid to be separated is applied onto the outer peripheral surface of the cylindrical base material stacked in alignment with the cylindrical axis of the cylindrical base material by continuously applying and drying the coating liquid by means of vertical application means. While holding the inner surface of the cylindrical base material adjacent to the inner surface of the cylindrical base material and applying rotational torque about the cylindrical axis of the cylindrical base material only to the cylindrical base material to be separated In a cylindrical base material coating apparatus that applies a tensile force upward and separates and discharges from a lower cylindrical base material adjacent thereto, a vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is F2, When the horizontal force in the direction perpendicular to the cylinder axis on the outer periphery of the cylindrical base material is F1 and the operating angle is θ, tan θ = F2 / F1, and the operating angle θ is 10 degrees to 70 degrees. A cylindrical base material coating device,
(2) A cylinder to be separated after being applied and dried on a peripheral surface of the cylindrical base material stacked with the cylinder axis of the cylindrical base material aligned by a vertical application means and dried. While holding the inner surface of the cylindrical base material adjacent to the inner surface of the cylindrical base material and applying rotational torque about the cylindrical axis of the cylindrical base material only to the cylindrical base material to be separated In the method of applying a cylindrical base material that applies a tensile force upward and separates and discharges it from an adjacent lower cylindrical base material, the vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is F2, When the horizontal force in the direction perpendicular to the cylinder axis on the outer periphery of the cylindrical base material is F1 and the operating angle is θ, tan θ = F2 / F1, and the operating angle θ is 10 degrees to 70 degrees. It is the coating method of the cylindrical base material to do.
[0014]
[Action]
The effect | action comprised as mentioned above is demonstrated.
[0015]
A coating solution is continuously applied and dried by a coating means (also referred to as a vertical coating means) on the outer peripheral surface of the cylindrical base material stacked with the cylindrical axis of the cylindrical base material aligned. Rotation torque about the cylindrical axis of the cylindrical base material only on the cylindrical base material to be separated only by gripping the inner surface of the cylindrical base material adjacent to the inner surface of the separate cylindrical base material In a cylindrical base material coating device that applies a tensile force upward while applying a pressure to separate and discharge the cylindrical base material from an adjacent lower cylindrical base material, a vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is applied. F2, when the horizontal force in the direction perpendicular to the cylinder axis on the outer periphery of the cylindrical base material is F1, the working angle is θ, and the tan θ = F2 / F1, the working angle θ is in the range of 5 degrees to 85 degrees. and was the time, as a result, there is no vibration or shock and separated at a predetermined working angle θ Vibration is not transmitted to the lower side of the cylindrical base material (drum). When the operating angle θ is greater than 85 degrees, a large force is required in the vertical direction to separate the coating film, and vibration is generated. When the working angle θ is smaller than 5 degrees, a large force is required in the horizontal direction, which adversely affects the entire coating process, and for example, vibration of a cylindrical base material (drum) occurs . The good Mashiku working angle theta (degrees) is 70 degrees from 10 degrees.
[0016]
In the cylindrical base material coating apparatus, the cylindrical base material is an aluminum drum. As a result, for example, after application and drying of an electrophotographic photosensitive drum using an aluminum material, separation and discharge can be performed without applying vibration or impact.
[0017]
A coating solution is continuously applied and dried by a coating means (also referred to as a vertical coating means) on the outer peripheral surface of the cylindrical base material stacked with the cylindrical axis of the cylindrical base material aligned. Rotation torque about the cylindrical axis of the cylindrical base material only on the cylindrical base material to be separated only by gripping the inner surface of the cylindrical base material adjacent to the inner surface of the separate cylindrical base material In the method of coating a cylindrical base material that applies a tensile force upward while applying and separating and discharging from the adjacent lower cylindrical base material, a vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is applied. F2, when the horizontal force in the direction perpendicular to the cylinder axis at the outer periphery of the cylindrical base material is F1, the working angle is θ, and tan θ = F2 / F1, when the working angle θ is 5 degrees to 85 degrees , As a result, when separated at a predetermined operating angle θ, there is no vibration or impact, and the lower cylinder Vibration is not transmitted to the base material (drum). When the operating angle θ is greater than 85 degrees, a large force is required in the vertical direction to separate the coating film, and vibration is generated. When the working angle θ is smaller than 5 degrees, a large force is required in the horizontal direction, which adversely affects the entire coating process, and for example, vibration of a cylindrical base material (drum) occurs. Preferably, the operating angle θ is 10 degrees to 70 degrees.
[0018]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the configuration of the coating apparatus. In the figure, 10 is a supply means for supplying the cylindrical base material 1 to a predetermined position vertically below the coating means and pushing it upward, and 20 is a gripper for gripping the outer peripheral surface of the supplied cylindrical base material 1 and aligning the cylinder axis. Conveying means for vertically pushing up and conveying the stack from below, 30 is a positioning means for aligning the cylindrical substrate 1 with the center of the annular application portion of the applying means, and 40 is on the outer peripheral surface of the cylindrical substrate. Application means for continuously applying the application liquid to the substrate, 50 is a drying means for drying the application liquid applied on the cylindrical substrate 1, and 60 is a plurality of stacked cylindrical substrates that have been dried and vertically conveyed. Separating / discharging means for separating and discharging the material one by one.
[0019]
The coating apparatus of the present invention has a configuration in which each of the above-described means is continuously arranged on the vertical center line ZZ, and automatic production can be achieved with high accuracy. The supply means 10 includes a movable table 12 having a plurality of mounting portions 11 for mounting the cylindrical base material 1, and a drive section that rotates the movable table 12 and sends it to a vertical line connected to the transport means 20. 13. A lifting / lowering unit 14 that pushes upward the cylindrical base material 1 that is already gripped and transported upward by the transport means 20, and a hand for supplying the cylindrical base material provided at the upper end of the lifting / lowering part 14 The controller 15 includes a control unit (not shown) that controls the timing of the rotation by the unit 15 and the driving unit 13 and the push-up timing by the elevating unit 14. The cylindrical substrate 1 is supplied onto the movable table 12 by a robot handle (not shown).
[0020]
The conveying means 20 provided above the supply means 10 has two sets of gripping portions 21 and 22 that can be pressed against and separated from the outer peripheral surface of the cylindrical base material 1 and can be moved vertically and vertically. It has the function of positioning, gripping and transporting the substrate 1 upward. Hereinafter, the details of each of the means 20, 30, 40, 50, 60 will be described later.
[0021]
FIG. 2 is a perspective view showing another embodiment of the coating apparatus. In this embodiment, on the vertical center line ZZ above the conveying means 20, a unit A comprising positioning means 30A, coating means 40A and drying means 50A, positioning means 30B, coating means 40B and drying means 50B. Are arranged in a vertical column. The unit C is composed of a unit B consisting of: positioning unit 30C, coating means 40C, and drying means 50C. The separation and discharge means 60 is disposed on the uppermost stage. The coating liquid discharged from each of the coating means 40A, 40B, and 40C sequentially forms a multilayer coating layer on the cylindrical substrate 1, and is dried by each of the drying means 50A, 50B, and 50C, and then separated and discharged. 60, the uppermost cylindrical substrate 1A is gripped and separated from the lower cylindrical substrate 1B. Separation gripping for holding the inside of the cylindrical base material is described in JP-A-61-120662, JP-A-4-258960, and JP-A-7-43917. In particular, the upper cylindrical substrate 1A is preferably separated while holding the cylindrical substrate 1B below the cylindrical substrate 1A to be separated.
[0022]
Next, the process of the coating apparatus will be described. The cylindrical substrate 1 is placed at the position of the cylindrical substrate 1A on the movable table 12 from the cylindrical substrate storage chamber by a supply robot (not shown). The cylindrical base material 1A reaches the position of the cylindrical base material 1B by the rotation of the movable table 12 in the arrow direction. At this time, the elevating part (supply arm) 14 pushes up the cylindrical base material 1 </ b> B upward from below and is supplied to the position of the hand part 15. Preferably, when the lifting by the elevating unit 14 is completed, the buffer mechanism acts to eliminate the shock at the time of joining with the cylindrical base material 1B. In this way, the cylindrical substrate 1B is carried to the 1C conveying means 20.
[0023]
Denoted at 20 is a conveying means. A connecting portion between the cylindrical base materials 1 </ b> C and 1 </ b> D is gripped by gripping portions (conveying hands) 21 and 22, transported upward, and reaches the positioning means 30. Reference numeral 30 denotes positioning means. In addition to the positioning means described in JP-A-3-280063, ring-shaped positioning described in Japanese Patent Application Nos. 7-125230 and 7-125231 is preferably used.
[0024]
The cylindrical base material accurately positioned in this way is transferred to the application means 40 and applied. Reference numeral 40 denotes a vertical coating means, and (1) slide hopper type, (2) extrusion type, (3) ring coater type, (4) spray coater type, etc. The slide hopper type (1) is preferable because it can be applied by moving relative to the surface, but a highly reliable and stable coating can be obtained. For example, Japanese Patent Laid-Open No. 58-189061 It is described in detail in the publication.
[0025]
The coating composition is applied onto the cylindrical substrate 1 as described above. The coated cylindrical substrate 1 is transferred to the drying means 50. As the drying means 50, the drying hood 51 and the suction dryer 53 may be used in a stacked manner, or only the hood may be used according to the solvent and liquid film thickness of the coating liquid, or only the suction dryer may be used. These are described in Japanese Patent Application No. 5-216495 or Japanese Patent Application No. 5-99559. Further, in the case of a certain coating solution, the drying means may not be provided specially and may be left to natural drying.
[0026]
Thereafter, the process proceeds to the separation and discharge means 60. Those described in detail in JP-A-7-43917 are preferred. As another example, JP-A-61-120662 and JP-A-61-120664 may be used. The separation and discharge means will be described in detail later with reference to FIG.
[0027]
FIG. 3 is a perspective view of the coating means. As shown in the figure, a plurality of cylindrical base materials 1A and 1B (hereinafter referred to as cylindrical base materials 1) superimposed vertically along the center line ZZ are continuously moved upward in the direction of the arrow. The coating solution (photosensitive solution) is applied by a portion (hopper coating surface) 41 that surrounds the periphery and is directly related to the coating of the slide hopper type coating means on the outer peripheral surface of the cylindrical substrate 1. The cylindrical substrate 1 may be a hollow drum, for example, an aluminum drum, a plastic drum, or a seamless belt type. On the hopper coating surface 41, a narrow coating liquid distribution slit (abbreviated as a slit) 43 having a coating liquid outlet 42 opened to the cylindrical substrate 1 side is formed in the horizontal direction. The slit 43 communicates with an annular coating liquid distribution chamber (coating liquid reservoir chamber) 44 so that the coating liquid in a storage tank (not shown) is supplied to the annular coating liquid distribution chamber 44 via the supply pipe 4. It has become. On the other hand, below the coating solution outlet 42 of the slit 43, the coating solution slide is formed so as to continuously incline and end with a dimension slightly larger than the outer diameter of the cylindrical base material 1. A surface (hereinafter referred to as a slide surface) 45 is formed. Further, a lip-shaped portion extending downward from the end of the slide surface 45 is formed. In the application by the application means 40, in the process of pulling up the cylindrical substrate 1, when the application liquid is pushed out from the slit 43 and flows down along the slide surface 45, the application liquid reaching the end of the slide surface 45 is A bead is formed between the end of the slide surface 45 and the outer peripheral surface of the cylindrical substrate 1, and then applied to the surface of the cylindrical substrate 1. Since the end of the slide surface 45 and the cylindrical base material 1 are disposed with a certain gap, the cylindrical base material 1 is not applied to the cylindrical base material 1 even when it is formed in multiple layers without damaging the cylindrical base material 1. Can be applied without damaging the layer.
[0028]
On the other hand, an air vent member 46 for removing bubbles in the coating liquid distribution chamber 44 is provided in a part of the coating liquid distribution chamber 44 at a position farthest from the supply pipe 4. When the coating liquid is supplied to the coating liquid distribution chamber 44 and supplied from the coating liquid distribution slit 43 to the coating liquid outlet 42, the on-off valve 47 is opened and the air in the coating liquid distribution chamber 44 is discharged from the air vent member 46. .
[0029]
Positioning means 30 for positioning the circumferential direction of the cylindrical base material is fixed to the lower portion of the slide hopper type coating means 40. A plurality of air supply ports (not shown) and a plurality of exhaust ports (not shown) are formed in the main body of the positioning device 30 for the cylindrical base material 1. The plurality of air supply ports are connected to an air supply pump (not shown), and fluid such as air is pumped. A discharge port passes through the end of the air supply port that faces the outer peripheral surface of the cylindrical substrate 1. The discharge port faces the outer peripheral surface of the cylindrical substrate 1 with a predetermined gap.
[0030]
Above the coating means 40, a drying means 50 comprising a drying hood 51 and a dryer 53 is provided.
[0031]
FIG. 4 is an explanatory diagram of the separation and discharge means. As shown in the figure, the mobile robot 61, the air cylinder 62, the upper gripper 63, and the lower gripper 64 are included. The coated cylindrical substrate 1A is pushed upward from below and moved upward to reach the separation position as shown in FIG. 4 (a). At this time, the mobile robot 61 is activated to move the cylindrical substrate 1A to be separated. First, the lower gripper 64 holds the drum 1B adjacent to the cylindrical base material 1A to be separated at the position shown in FIG. 4B. Next, the upper gripper 63 holds the drum 1A to be separated at the position shown in FIG. The upper gripper 63 is moved upward by the air cylinder 62 to the position shown in FIG. The coating film extending from the cylindrical base material 1A to be separated to the adjacent cylindrical base material 1B is cut by the rotational torque and tensile force of the cylindrical base material 1A, and 1A and 1B are separated as shown in FIG. 4 (d). Is done. In order to discharge the separated drum 1A, the lower gripper 64 is released as shown in FIG. Thereafter, the mobile robot 61 and the air cylinder 62 are lowered to return to the initial position diagram 4 (a) for separation of the next drum 1B.
[0032]
FIG. 5 is a perspective view showing various embodiments of the separation and discharge means, and FIG. 5A is a perspective view showing the above-described embodiments. FIG. 5B is a perspective view showing another embodiment of the separation / discharge means 60. In FIG. 5B, the upper gripper 65 and the lower gripper 66 have substantially the same structure, and are expanded and contracted by the air pressure of the air cylinder 62, so that the three-point press contact with the inner peripheral surface of the cylindrical substrate 1; An annular elastic member that is spaced apart. FIG. 5C is a perspective view showing still another embodiment of the separation / discharge means 60. In FIG. 5C, the upper gripper 67 and the lower gripper 68 have substantially the same structure, and are swung up and contracted in an umbrella shape by swinging with the air pressure of the air cylinder 62. This is an annular rocking member that is pressed against and separated from the inner peripheral surface of the ring.
[0033]
FIG. 6 is an explanatory diagram of the separation force of the cylindrical base material. The force applied at the time of separation of the contact portion between the cylindrical substrate 1B and the cylindrical substrate 1A will be described. In the following description, it is assumed that the circumferential force of the cylindrical substrate is all applied to the action point P. A rotational torque T from the cylindrical base material 1A is applied to the outer peripheral surface of the cylindrical base material 1B, and a horizontal force F1 is applied in the tangential direction, where R is the radius of the cylindrical base material, and F1 = T / R. If the vertical force acting in the vertical direction is F2, the resultant force F is (F1 ² + F2 ² ) ^0.5 and the operating angle θ is tan ⁻¹ F2 / F1. The coating film in which the contact portions between the cylindrical base material 1A and the cylindrical base material 1B are connected is torn and separated by this synthetic force F. The vibration generated at the time of separation varies depending on the film thickness, film quality, degree of drying, etc. of the coating film, but vibration can be reduced by mechanically increasing the rigidity. It is preferable to perform the separation operation within the time passing through the non-image part.
[0034]
(Example 1)
Here, an experimental example of the example (referred to as Example 1) will be described. As the conductive support for the cylindrical substrate, an aluminum drum support having a diameter of 80 mm, a height of 355 mm, and 283 g is used. It was. Further, as the coating solution, the following (1) OCL-1 coating solution composition was used and coated so as to have a dry film thickness of 2.0 μm.
[0035]
(1) OCL-1 coating composition silicone fine particles (Tospearl 103 manufactured by Toshiba Silicone Co., Ltd.)
Polycarbonate (Z-200 manufactured by Mitsubishi Gas Chemical Company)
1,2-dichloroethane The above-mentioned coating liquid composition (solid content: solid content weight ratio Z-200: Tospearl fixed at 100: 1) is dispersed in a sand mill for 3 hours.
[0036]
In the experimental example of Example 1, separation was performed using the gripper of FIG. 5A after continuous application and drying with the apparatus of FIG. 1, and the vector of horizontal force F1 and the vector of vertical force F2 as shown in FIG. The separation angle was observed by changing the working angle θ (degrees) formed. The results are shown in Table 1.
[0037]
[Table 1]

[0038]
As shown in Table 1, when the working angle θ is in the range of 5 to 85 degrees, the separation is good, no vibration is generated, no coating film defects such as dust, dust, and scratches occur, and the coating property is good. A coating drum was obtained. In addition, since a large number of stable continuous coatings and complete automation can be performed over a long period of time, a high-quality and highly reliable product without dust or dust can be obtained.
[0039]
(Example 2)
Further, an experimental example (referred to as Example 2) of the embodiment of the present invention will be described. Coating and separation were performed with the sequential continuous coating apparatus of FIG. 2, and the working angle θ was changed as shown in Table 2 below. That is, on the aluminum drum support having a diameter of 80 mm, a height of 355 mm, and 283 g subjected to mirror finishing, the coating liquid compositions (1) UCL-3 (2) CGL-3 and (3) CTL-2 are respectively applied as follows: The slide hopper type coating device unit A (for (1) UCL-3), the coating device unit B (for (2) CGL-3), and the coating device unit C ((3) CTL-2) 3), three layers were successively applied and separated so as to have dry film thicknesses of 1.0 μm, 2.2 μm, and 23 μm, respectively, and a photosensitive drum was prepared and the separated state was observed.
[0040]

Disperse the above coating composition (solid content weight ratio CGM-3: KR-5240 = 2: 1) using a sand mill for 17 hours.
[0041]
(3) CTL-2 coating liquid composition CTM-2 5 kg
Polycarbonate (Z-200 manufactured by Mitsubishi Gas Chemical Company) 5.6kg
1,2-dichloroethane 28 l
About solid content, solid content weight ratio CTM-1: Z-200 = 0.89: 1 was fixed.
[0042]
Here, the chemical formulas of the above-mentioned CGM-3 and CTM-2 are shown below.
[0043]
[Chemical 1]

[0044]
[Chemical formula 2]

[0045]
The results are shown in Table 2.
[0046]
[Table 2]

[0047]
As in the present invention, the working angle θ is in the range of 5 to 85 degrees, the separation is good, the vibration is not generated, the coating film defects such as dust, dust, scratches and the like are not generated, and the drum has good coating properties. was gotten. In addition, since a large number of stable continuous coatings and complete automation can be performed over a long period of time, a product with high quality and high reliability can be obtained without dust and dust.
[0048]
The obtained photoreceptor No. 2-1. When 2-3 was actually photographed with a U-BIX 3035 copying machine manufactured by Konica, it was satisfactory with no image unevenness, density unevenness, image defects (black spots, white spots, dust, streaks) and the like.
[0049]
【The invention's effect】
As described above , vertical force and horizontal force are applied to the cylindrical base material to be separated at a predetermined operating angle at the same time for separation, so that strong force is not applied to the cylindrical base material. Separation was possible, and vibrations and shocks at the time of separation were not transmitted to the lower cylindrical base material.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a coating apparatus.
FIG. 2 is a perspective view showing another embodiment of the coating apparatus.
FIG. 3 is a perspective view of the coating means.
FIG. 4 is an explanatory diagram of separation and discharge means.
FIG. 5 is a perspective view showing various embodiments of separation and discharge means.
FIG. 6 is an explanatory diagram of a separation force of a cylindrical base material.
[Explanation of symbols]
1,1A, 1B, 1C, 1D Cylindrical base material (drum, photosensitive drum)
4 Supply pipe 10 Supply means 11 Mounting portion 12 Movable table 13 Drive portion 14 Lifting portion 15 Hand portion 20 Transport means 21, 22 Grip portions 30, 30A, 30B, 30C Positioning means 40, 40A, 40B, 40C Coating means (slide hopper Mold application means)
41 Coating head (coater, hopper coating surface)
42 Coating liquid outlet 43 Coating liquid distribution slit (slit)
44 Coating solution distribution chamber 45 Coating solution slide surface (slide surface)
46 Air venting member 47 On-off valve 50, 50A, 50B, 50C Drying means 51 Drying hood 53 Dryer 60 Separating and discharging means (separator)
61 Mobile robot 62 Air cylinder 63, 65, 67 Upper gripper (upper chuck)
64, 66, 68 Lower gripper (lower chuck)
F Composite force F1 Horizontal force F2 Vertical force θ Action angle P Action point

Claims (3)

On the outer peripheral surface of the cylindrical base material stacked in alignment with the cylindrical axis of the cylindrical base material, the coating liquid is continuously applied by a vertical application means, dried, and then applied to the separated cylindrical base material. The inner surface of the cylindrical base material which is adjacent to the inner surface of the lower portion is gripped and pulled upward while applying rotational torque about the cylindrical axis of the cylindrical base material only to the cylindrical base material to be separated. In a cylindrical base material coating apparatus that applies a force to separate and discharges from a lower cylindrical base material adjacent thereto, a vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is F2, and the cylindrical base material A cylindrical shape characterized in that when the horizontal force in the direction perpendicular to the cylinder axis at the outer periphery of the material is F1 and the working angle is θ and tan θ = F2 / F1, the working angle θ is 10 ° to 70 °. Substrate coating device.   2. The cylindrical base material coating apparatus according to claim 1, wherein the cylindrical base material is an aluminum drum. On the outer peripheral surface of the cylindrical base material stacked in alignment with the cylindrical axis of the cylindrical base material, the coating liquid is continuously applied by a vertical application means, dried, and then applied to the separated cylindrical base material. The inner surface of the cylindrical base material which is adjacent to the inner surface of the lower portion is gripped and pulled upward while applying rotational torque about the cylindrical axis of the cylindrical base material only to the cylindrical base material to be separated. In the method of coating a cylindrical base material that separates and discharges from the adjacent lower cylindrical base material by applying a force, a vertical force that pulls upward in the same direction as the cylindrical axis of the cylindrical base material is F2, and the cylindrical base material A cylindrical shape characterized in that when the horizontal force in the direction perpendicular to the cylinder axis at the outer periphery of the material is F1 and the working angle is θ and tan θ = F2 / F1, the working angle θ is 10 ° to 70 °. Application method of substrate.

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