JPH11216621A - Cylindrical body manufacture, cylindrical body, developing sleeve, developing device, electrophotographic photoreceptor manufacture and electrophotographic photoreceptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical body manufacture capable of highly accurately setting a coaxial degree and shaking accuracy between a cylindrical member and a flange member. SOLUTION: A cylindrical body manufacture comprises the steps of machining the end inner side of a cylindrical member W2 and the connected part of a shaft member W1 to a dimension based on an interference fit relationship, heating the end part of the cylindrical member W2 and expanding the inner diameter of the cylindrical member W2 to a dimension based on a clearance fit relation with the connected part of the shaft member W1, holding the shaft member W1 by a holding jig 151 where squareness between the gripping part of the shaft member W1 and an end surface 151A orthogonal to the axis of the shaft member W1 is highly accurately set, and inserting the shaft member W1 held by the holding jig 151 into the end part of the cylindrical body W2 during the cooling of the cylindrical member W2 and bringing the end surface of the holding jig 151 into contact with the end surface 132 of the cylindrical body W2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical member such as a developing sleeve for developing and visualizing a latent image formed on a latent image holding member such as an electrophotographic photosensitive member in electrophotography. TECHNICAL FIELD The present invention relates to a method for manufacturing a cylindrical member, a developing sleeve, a developing device, a method for manufacturing an electrophotographic photosensitive member, and an electrophotographic photosensitive member.

2. Description of the Related Art Conventionally, as an electrophotographic method, US Pat.
No. 297691, JP-B-42-23910 and JP-B-43-24748,
Many methods are known. Generally, a photoconductor made of a photoconductive substance is used, an electric latent image is formed on the photoconductor by various means, and then the latent image is developed with a developer (toner). The toner image is transferred to a transfer material such as paper as necessary, and then fixed by heating, pressurizing, or solvent vapor to obtain a copy.

A method of developing a latent image is generally classified into a dry developing method and a wet developing method, but the wet developing method is hardly used at present because the solvent is evaporated. As a dry developer, a one-component two-component developer, a magnetic or non-magnetic developer, and an insulating or dielectric developer are used. The developer is carried and a latent image is faithfully visualized. For this purpose, a developing sleeve for carrying and transporting the developer to the photoconductor on which the latent image is formed is used.

In general, a cylindrical body such as a developing sleeve includes Al having a purity of 99.5% or more, or 0.05 to 0.2.
Cu-Mn containing 0% Cu and 1.0 to 1.5% Mn
-Al alloys or Si-Mg-Al alloys containing 0.20 to 0.60% Si and 0.45 to 0.90 Mg are used. Make dimensional accuracy. However, since a large bend remains in such an aluminum drawn cylinder as it is, a roll correction or the like is usually performed thereafter to finish to a desired dimensional accuracy (straightness, run-out). After that, it is cut to a predetermined length, and the ends are finished by cutting for the purpose of removing burrs at both ends and improving end face accuracy.

[0004] For example, in the case of a developing sleeve, sand blasting or the like is performed on the surface of the base cylinder in order to impart the function of the developing sleeve to the base cylinder thus formed, and irregularities are formed on the surface to transfer the developer (toner). Or to further improve the chargeability of the toner,
On the surface on which the irregularities are formed, a coating material in which conductive carbon is dispersed in a thermosetting resin is applied by spray coating, and is applied for about 150 hours.
A method is known in which the coating film is cured by drying in a constant temperature bath at a temperature of from 170C to 170C for 20 to 30 minutes.

[0005] Finally, a flange member for rotatably supporting the developing sleeve is bonded to both ends of the cylindrical member thus formed by bonding, press fitting, or other methods. Further, depending on the type of developer (toner) used, a magnet roller for conveying toner by magnetic force may be inserted into the cylindrical member. This is the case when the toner is a magnetic toner. In this manner, the developing member is completed by connecting the flange members to both ends of the cylindrical member.

[0006]

However, since the flange member is connected to the base cylinder, there is a disadvantage that the coaxiality between the flange member and the cylindrical member is deteriorated. In other words, since the coupling is a single component such as a cylindrical component and a flange component, the coupling accuracy of the components is inevitably limited. In particular, it is not suitable as a high-precision cylindrical member used in an electrophotographic apparatus or the like. Was. If the accuracy of the flange member is poor, the flange member may be bent and joined to the cylindrical member, and in such a case, the rotation behavior of the developing sleeve becomes irregular, and the density unevenness of the sleeve cycle on the image may occur. May appear.

As a method for compensating for such a defect, there is the following method.

That is, a flange member is previously press-fitted, bonded, or otherwise bonded to one side of a cylindrical member serving as a base of the developing sleeve. Then, before going through the blasting and coating process, insert the magnet roller first, and after joining the other flange member on the other side of the cylindrical member in the same manner, cut the flange member and the outer surface of the cylindrical member at the same time with a lathe etc. To finish the coaxiality between the flange member and the cylindrical member with high accuracy. Finally, coating is performed. According to this method, the coaxiality between the bearing portion of the flange member and the cylindrical member depends on the machining accuracy of the lathe, and a high accuracy can be obtained relatively easily.

However, this method has the following problems. For example, in a drying process after coating, a cylindrical member incorporating a magnet roller is heated to 150 to 170 ° C.
When the magnet roller inserted inside the cylindrical member is deformed by the heat when it is placed under the high temperature, the phenomenon occurs that it bends greatly inside the cylindrical member and contacts the inner surface of the cylindrical member. There is also. In addition, due to the deformation of the magnet roller, the magnetic force curve may be out of order,
The contact of the magnet roller with the inner surface of the cylindrical member affects the rotation behavior of the developing sleeve, and adversely affects an image to be formed. In addition, during cutting by a lathe or the like, since a magnet roller is inserted inside the cylinder, when the work is rotated at a high speed in the cutting, vibration is likely to occur. Therefore, the rotation speed of the work is about 3,000.
rpm or less, and it is difficult to speed up the cutting process. In addition, when each work is attached to and detached from the cutting machine, the rotation of the motor must be stopped, and a stand-by time is lengthened because a start-up time of the motor is required for each work cycle of each work. As a result, the processing cycle time of the work itself is lengthened, and the production cost is increased.

Further, as a method of connecting the cylindrical member and the flange member of the developing sleeve, (A) a plastic flange member is press-fitted into an end of an aluminum cylindrical member, and then the end of the cylindrical member is connected. When caulking or (B) when an aluminum flange member is press-fitted into the end of an aluminum cylindrical member, there are the following problems, respectively.

Problems of the method (A) In order to obtain a high-precision connection by press-fitting a plastic flange member to the end of an aluminum cylindrical member,
As a device for press-fitting the flange member, a press-fit device which is adjusted with extremely high precision is required, the adjustment is difficult, and the press-fit device becomes expensive. Further, even if a high-precision press-fitting device is used, the deflection of the flange member with respect to the outer diameter reference of the cylindrical member increases. Further, in order to prevent the flange member from coming off, it is necessary to caulk the connecting portion of the cylindrical member after press-fitting the flange member.

Further, when the runout of the flange member is 15 μm or more, when an image is formed using this developing sleeve, the axis of the cylindrical member does not align with the axis of the flange member, and an unnecessary force acts on the cylindrical member. As a result, the gap between the developing sleeve and the photosensitive drum cannot be kept constant, and pitch unevenness appears remarkably.

Further, in order to keep the gap between the developing sleeve and the photosensitive drum joined by such a method constant, sleeve rollers are attached to both ends of the cylindrical member of the developing sleeve, and the sleeve roller is fixed. When the preload is pressed against the photosensitive drum, the following problem occurs due to the deflection of the rotation. That is, since this sleeve roller is made of a flexible resin that does not damage the cylindrical member of the developing sleeve or the surface of the photosensitive drum,
As a result of non-uniform shaving due to rotation fluctuation, durability is poor, which is a factor that hinders high-speed rotation of the developing sleeve with respect to the photosensitive drum, and hinders high-speed recording operation.

Problems of the method (B) Since the aluminum flange member is press-fitted into the aluminum cylindrical member, it is not necessary to caulk the connecting portion of the cylindrical member in the above (A). Non-uniform press-fitting due to galling between the flange member and the flange member causes the flange member to have poor deflection.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a cylindrical body capable of setting the degree of coaxiality and runout accuracy between a cylindrical member and a flange member with high accuracy. And a cylindrical body, a developing sleeve, a developing device, a method of manufacturing an electrophotographic photosensitive member, and an electrophotographic photosensitive member.

[0016]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, a method for manufacturing a cylindrical body according to the present invention is a method for manufacturing a cylindrical body in which a connecting portion of a shaft-shaped member is inserted and connected inside an end of a cylindrical member, wherein the end of the cylindrical member is provided. A processing step of processing the inside of the portion and the joint portion of the shaft-shaped member into a dimension that is a tight fit, and heating the end of the cylindrical member to form a joint between the shaft-shaped member and the clearance fit. A heating step of expanding the inner diameter of the cylindrical member to a relevant dimension; and the squareness of the shaft-shaped member with high accuracy in the perpendicularity between the gripping portion of the shaft-shaped member and the end face orthogonal to the axis of the shaft-shaped member. The holding step of holding by the set holding jig, and during cooling of the cylindrical member, insert the shaft-shaped member held by the holding jig inside the end of the cylindrical member, and The end face is the end face of the cylindrical member It is characterized by comprising an insertion step of contacting.

Further, in the method of manufacturing a cylindrical body according to the present invention, the holding jig may be configured so that the shaft-shaped member is inserted into the shaft so that the shaft-shaped member is inserted along the inner peripheral surface of the cylindrical member. It is characterized in that it is held movably in a direction substantially perpendicular to the axis of the member.

In the method for manufacturing a cylindrical body according to the present invention, the holding jig is processed so that a perpendicularity between a holding portion of the shaft-shaped member and the end face is 5 μm or less. And

Further, in the method for manufacturing a cylindrical body according to the present invention, at least a connecting portion between the cylindrical member and the shaft-shaped member is made of the same material as a main component.

Further, in the method for manufacturing a cylindrical body according to the present invention, at least a joint between the cylindrical member and the shaft-shaped member is formed of a material whose main component is aluminum.

Further, in the method for manufacturing a cylindrical body according to the present invention, the cylindrical body includes a magnet roller therein.

In the method of manufacturing a cylindrical body according to the present invention, the thickness of the cylindrical member is 0.5 mm to 2.0 m.
m, the interference between the inside of the end of the cylindrical member and the joint of the shaft-shaped member is 0.04 to 0.2% of the reference inner diameter of the cylindrical member, and the cylindrical member is rotated. When the deflection inside the end of the cylindrical member is 10 μm or less, the coupling length between the inside of the end of the cylindrical member and the coupling portion of the shaft-shaped member is 2 mm to 6 mm, and the end of the cylindrical member is The inside is expanded by 0.3 to 0.5% of the reference inner diameter in the heating step.

Further, the cylindrical body according to the present invention is provided in claim 1.
7. It is manufactured by the manufacturing method described in any one of the above items 7 to 7.

Further, a developing sleeve according to the present invention is manufactured by the manufacturing method according to any one of the first to seventh aspects.

Further, a developing device according to the present invention has a photosensitive drum on which an electrostatic latent image is formed, and a developing sleeve for supplying a developer to the photosensitive drum and causing the electrostatic latent image to develop. Wherein the developing sleeve is the developing sleeve according to claim 9.

Further, the method of manufacturing an electrophotographic photosensitive member according to the present invention is directed to a method of manufacturing an electrophotographic photosensitive member in which the shaft portion of a flange member having a shaft portion and a flange portion is inserted and coupled inside an end portion of a cylindrical member. A manufacturing method, wherein a processing step of processing an inner side of an end of the cylindrical member and a shaft portion of the flange member into a dimension having an interference fit, and moving the flange member in a direction substantially orthogonal to the axis thereof. A holding step of holding by a holding jig for holding as possible, by the holding jig,
Press-fitting the shaft portion of the flange member held by the holding jig into the inside of the end of the cylindrical member, and bringing the flange portion of the flange member into contact with the end surface of the cylindrical member. Features.

Further, in the method of manufacturing an electrophotographic photosensitive member according to the present invention, at least a joint of the cylindrical member is formed of a material containing aluminum as a main component.

Further, in the method of manufacturing an electrophotographic photosensitive member according to the present invention, the material containing aluminum as a main component is a JIS-based 3000 series or 6000 series.

In the method of manufacturing an electrophotographic photosensitive member according to the present invention, the flange member is formed of a synthetic resin such as a thermoplastic resin and a thermosetting resin.

Further, in the method of manufacturing an electrophotographic photosensitive member according to the present invention, the flange member is formed of one of a polycarbonate resin and a polyacetal resin.

The electrophotographic photoreceptor according to the present invention comprises:
It is manufactured by the manufacturing method according to any one of claims 11 to 15.

Further, a method of manufacturing a cylindrical body according to the present invention is a method of manufacturing a cylindrical body in which the shaft of a flange member having a shaft and a flange is inserted and connected inside the end of the cylindrical member. A processing step of processing the inner side of the end of the cylindrical member and the shaft portion made of the thermoplastic resin of the flange member into a dimension having an interference fit, and heating the end of the cylindrical member, A heating step of expanding the inner diameter of the cylindrical member to a dimension having a clearance fit with the shaft of the flange member, while aligning the shaft of the flange member with respect to the axis outside the cylindrical member. And a fixing step of heat-melting the shaft and inserting the shaft inside the end of the cylindrical member, and a fixing step of cooling the cylindrical member and fixing the flange member.

Further, in the method for manufacturing a cylindrical body according to the present invention, at least a connecting portion of the cylindrical member is formed of metal.

Further, in the method of manufacturing a cylindrical body according to the present invention, at least a joint of the cylindrical member is formed of a material containing aluminum as a main component.

In the method for manufacturing a cylindrical body according to the present invention, the cylindrical member includes a magnet roller therein.

Further, in the method of manufacturing a cylindrical body according to the present invention, the flange member is formed of a thermoplastic resin and a metal.

Further, in the method for manufacturing a cylindrical body according to the present invention, the flange member is formed of a thermoplastic resin and a non-thermoplastic resin.

In the method of manufacturing a cylindrical body according to the present invention, the thickness of the cylindrical member is 0.5 mm to 2.0 m.
m, and the interference between the inside of the end of the cylindrical member and the shaft of the flange member is 0.
0.4 to 0.2%, wherein the run-out inside the end of the cylindrical member when the cylindrical member is rotated is 0.3 mm or less, and the inside of the end of the cylindrical member and the shaft of the flange member are not more than 0.3 mm. Is 2 mm to 6 mm, and the inside of the end of the cylindrical member is 0.3 mm of the reference inner diameter in the heating step.
It is characterized in that the diameter is expanded by 0.5%.

Further, the cylindrical body according to the present invention is provided in claim 1.
It is characterized by being manufactured by the manufacturing method according to any one of 7 to 23.

Further, the developing sleeve according to the present invention is manufactured by the manufacturing method according to any one of claims 17 to 23.

A developing device according to the present invention includes a photosensitive drum on which an electrostatic latent image is formed, and a developing sleeve for supplying a developer to the photosensitive drum and causing the electrostatic latent image to develop. 25. The developing sleeve according to claim 25, wherein
Is a developing sleeve described in (1).

[0042]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

(First Embodiment) Prior to a specific description of the first embodiment, a background art and an outline of the present embodiment will be described.

[Background Art and Outline] Conventionally, various methods of joining a cylindrical member and a flange member with high precision without bending the flange member have been tried. For example, in Japanese Utility Model Laid-Open No. 56-154007,
A roll is disclosed in which a plurality of holes are provided on the outer periphery of a fitting portion of a flange member, and a cylindrical member is caulked and joined. Japanese Utility Model Laid-Open No. 57-79862 discloses an annular groove at an end of the flange member. A roll provided with an end portion of a cylindrical member swaged therein is disclosed.
No. 04 discloses a roll obtained by subjecting a cylindrical member to spigot processing, inserting a flange member having a fitting portion smaller than the inner diameter of the spigot, and joining the flange members with an adhesive.

However, in the method using caulking among these methods, although the bonding strength of the flange member can be obtained by caulking, eccentricity occurs due to external pressure for caulking, and a cylindrical member without bending of the flange member can be obtained. It is hard. In addition, in the bonding method using an adhesive, it is difficult to apply the adhesive evenly and fix the flange member so as to be less bent. In addition, there are cases where the bonding strength is reduced due to aging, and the bonding strength of the flange member is sometimes reduced. And a connection with less bending of the flange member cannot be obtained at the same time.

In order to solve such a problem, the present inventors have made intensive studies. As a result, the connecting portion of the cylindrical member is enlarged by heating, and a flange member is inserted into the connecting portion in a loose fit state to cool and join together. Was found to be effective.

However, by simply shrink-fitting the cylindrical member and the flange member in this way, the joint strength can be obtained, but the joint with less bending cannot be obtained.
It is for the following reasons.

That is, generally, the thermal conductivity of the metal is large, and when the flange member comes into contact with the inner surface of the cylindrical member, heat is quickly transferred, and the cylindrical member returns to its original size.
At this time, the flange member is inserted while being shifted from the central axis of the cylindrical member, or bent and inserted. In order to solve this problem, immediately adjust the horizontal displacement of the central axis of the cylindrical member and the flange member, and make sure that the end face of the cylindrical member and the facing portion of the flange member are in contact with each other and pressed down. Is important.

Generally, a developing sleeve as a cylindrical body is
In order to develop a latent image on a latent image carrier formed by an electrophotographic method, an electrostatic recording method, or the like, a magnet roller is inserted therein. This is because the developer is conveyed by magnetic force, and the thickness of the cylindrical member in the developing sleeve is 0.5 mm to 2.
The range is 0 mm. In addition, the coupling strength of the flange member in the developing sleeve needs to be 5 kg to 50 kg from the relationship of the bending of the flange due to the driving rotation and the loss, and it has been found that the following dimensions are effective from this point.

That is, the coupling interference is set at 0.
A range of 04-0.2% is required. The bond length is
The range is from 1 mm to 5 mm from the viewpoint of preventing the flange member from falling down after coupling and securing the coupling strength. If the coupling interference is 0.04% or less of the reference inner diameter, the required bonding strength cannot be obtained, and if the coupling interference is 0.2% or more of the reference inner diameter, the strength becomes more than necessary. If the coupling length is 1 mm or less, the flange portion after coupling may fall down, and it is unnecessary to make it 5 mm or more. Further, the diameter expansion of the cylindrical member due to heating is preferably in the range of 0.3 to 0.5% of the reference inner diameter. When the diameter is 0.3% or less, the flange member is bent and joined by the contact between the cylindrical member and the flange member. If it is 0.5% or more, the heating temperature becomes too high, and the material may be thermally degraded.

In order to obtain a good image using the developing sleeve, it is preferable that the runout of the flange member is 15 μm or less. By setting the precision to 15 μm or less, it is possible to suppress the occurrence of runout of the entire developing sleeve in connection with the means for rotating and driving the developing sleeve. In order to obtain such accuracy, it is necessary to make the inflation at the connecting portion of the cylindrical member 10 μm or less and the end surface perpendicularity to 5 μm or less. Further, it is necessary that the runout of the flange member alone be 5 μm or less. Under such coupling conditions, the runout of the flange member is 15 μm or less.

Further, the cylindrical body such as the developing flange and the photosensitive drum is used in order to obtain a preferable bonding strength even in any environment such as high temperature, high humidity, and low temperature and low humidity in consideration of the environmental conditions of a copying machine or a printer provided with the same. Preferably, the cylindrical member and the flange member are made of the same material. Particularly, aluminum is preferable from the viewpoint of lightness and workability. However, aluminum has a disadvantage that it is easily deformed by heat under high temperature thermal conditions. Therefore, the diameter expansion range of the aluminum cylindrical member is set to 0.3 to 0.5 of the reference inner diameter.
%, It is necessary to suppress the heating temperature.

In some developing sleeves, one of the two flange members joined to both ends of the cylindrical member is a plastic flange, which is easily connected by means of press-fitting, caulking, bonding or the like. But,
In developing sleeves such as copiers and printers that require durability, it is necessary to couple a flange member to both ends of a cylindrical member with high precision. In such a case, a magnet roller is provided inside the cylindrical member. It is necessary to connect the flange members in the housed state. In this case, one flange member is connected to one end of the cylindrical member, and the other end of the cylindrical member and the other flange member are processed simultaneously or separately by cutting or centerless cutting to form a cylindrical member having good coaxiality. After preparation, a magnet roller is inserted into the inside of the cylindrical member, and the other flange member is connected to the other end of the cylindrical member. When the flange member is connected to the cylindrical member in the presence of the magnet roller in the cylindrical member, the heating temperature of the cylindrical member is reduced in order to avoid the fluctuation of the magnetic force of the magnet roller due to the heating for expanding the diameter of the cylindrical member. Need to be suppressed. If there is a change in the magnetic force of the magnet roller, the image deteriorates. From such necessity, the diameter expansion range of the cylindrical member is set to 0.3 to 0.5% of the reference inner diameter. The applicant of the present application has previously filed that the change in magnetic force of the magnet roller can be suppressed by setting the heating temperature to 200 ° C. or lower.

However, in such a coupling method,
In order to obtain high-precision coupling accuracy, it is necessary to process the accuracy of the perpendicularity of the end face of the flange portion of the flange with high accuracy (see FIG. 33).

Here, a high-precision machining device is required to machine the end surface perpendicularity of the flange portion of the flange with high accuracy, and there is a disadvantage that the machining cost is high.

The inventors of the present invention have conducted intensive studies for the purpose of achieving both a reduction in the processing cost and a high-precision connection. As a result, the use of a flange member having no flange portion as in the present embodiment greatly reduces the processing cost. Was found to be possible.

Specifically, by forming the holding jig for holding the flange into a shape having the same function and effect as the flange of the flange, high-precision coupling can be obtained.

That is, in the shape of the holding jig, by forming a shape having a portion larger than the outer diameter of the connecting portion of the flange member, a predetermined temperature is established so as to have a clearance fit with the connecting portion of the flange member. After being heated and expanded in diameter, it is fitted into the end of the cylindrical member while being aligned with respect to the axis of the cylindrical member during cooling of the end of the cylindrical member, and the end face of the cylindrical member is By contacting the end face of the holding jig,
High accuracy can be obtained by the same operation and effect as the flange portion of the flange with flange.

According to this method, a highly accurate coupling can be stably obtained by processing the end face precision of the holding jig with high precision.

Here, the perpendicularity of the end face of the holding jig is 1 to 5 μm. If it is 5 μm or more, the coupling accuracy becomes poor.

According to such a coupling method, the variation in the coupling accuracy due to the variation in the perpendicularity of the end face of the flange with the flange is eliminated, and the stable accuracy is obtained.
The improvement of the process capability is achieved.

Here, the outer diameter of the holding jig needs to be larger than the outer diameter of the cylindrical member that has been heated and expanded.

As a further effect of such a connection, the length of the connection is increased by the brim, so that the connection can be improved.

In general, in the case of a developing sleeve, particularly in development using a mag roller, the length of the sleeve is limited from the viewpoint of the developing area and the size of the main body, and the mag roller also has a required length. Due to such a limitation, there is a certain restriction on the coupling length of the flange, and there is a restriction on the coupling force.
Here, in the present bonding method, the bonding length can be increased by the length of the brim portion, so that the bonding strength can be improved.

In summary, in this embodiment, the shape of the flange holding jig is such that it has a portion larger than the outer diameter of the connecting portion of the flange member, so that there is a relationship of fitting with the connecting portion of the flange member. After being heated to a predetermined temperature to expand the diameter, the cylindrical member is inserted into the end of the cylindrical member while being aligned with respect to the axis of the cylindrical member while cooling the end of the cylindrical member, and By contacting the end face of the jig with the end face of the member, high accuracy can be obtained by the same operation and effect as the flange part of the flange with flange.

According to such a coupling method, variations in flange coupling accuracy due to variations in the perpendicularity of end faces of flanges with flanges are eliminated, stable accuracy is obtained, and process capability is improved.

Next, the first embodiment of the present invention will be described by referring to "the overall configuration of the image forming apparatus", "the developing sleeve manufacturing apparatus",
This will be described separately for "Specific example of manufacturing method of developing sleeve".

[Image Forming Apparatus] FIG. 26 shows a schematic structure of a transfer type electrophotographic apparatus provided with a developing sleeve as a cylindrical member and a photosensitive drum.

In FIG. 26, reference numeral 1101 denotes a photosensitive drum which is driven to rotate at a predetermined peripheral speed in the direction of arrow A about a shaft 1101a. The photosensitive drum 1101 receives a uniform charge of a predetermined positive or negative potential on the peripheral surface thereof by a charging unit 1102 during the rotation process, and then, in an exposure unit 1103, a light image exposure L (slit exposure) by an image exposure unit (not shown). , Laser beam scanning exposure, etc.). As a result, an electrostatic latent image corresponding to the exposure image is sequentially formed on the peripheral surface of the photosensitive drum 1101.

The electrostatic latent image is then developed by developing means 1104
The toner-developed image is transferred to a photosensitive drum 11 from a paper feeding unit (not shown) by a transfer unit 1105.
The transfer material P is sequentially transferred onto the surface of the supplied transfer material P in synchronization with the rotation of the photosensitive drum 1101 between the transfer material 01 and the transfer unit 1105. Reference numeral 1020 denotes a developing sleeve provided in the developing unit 1104. The transfer material P having undergone the image transfer is separated from the surface of the photosensitive drum 1101, introduced into the image fixing means 1108, subjected to the image fixation, and printed out of the machine as a copy.

The surface of the photosensitive drum 1101 after the image transfer is
The cleaning unit 1106 removes the untransferred toner to make the surface a clean surface, and the pre-exposure unit 1107 removes the charge, and is used repeatedly for image formation.

Uniform charging means 110 for photosensitive drum 1101
As for 2, a corona charging device or contact charging is generally widely used. Also, as the transfer unit 1105, a corona charging transfer unit is generally widely used. Also,
As the electrophotographic apparatus, a plurality of components among the above-described components such as the photosensitive drum 1101, the developing unit 1104, and the cleaning unit 1106 may be integrally connected as a unit, and this unit may be configured to be detachable from the apparatus main body. . For example, at least one of the charging unit 1102, the developing unit 1104, and the cleaning unit 1106 is connected to the photosensitive drum 1
The unit integrally supported with 101 may be a detachable single unit (developing device) attached to the apparatus main body, and may be detachable using a guide means such as a rail of the apparatus main body.

In the case where the electrophotographic apparatus is used as a copying machine or a printer, the light image exposure L reads reflected light or transmitted light from the original, or reads the original to form a signal, and scans the laser beam with this signal. , LED array driving, liquid crystal shutter array driving, or the like.

When used as a facsimile printer, the light image exposure L is an exposure for printing received data. FIG. 27 is a block diagram showing a configuration example in this case.

In FIG. 27, the controller 1111
Controls the image reading unit 1110 and the printer 1119. The whole of the controller 1111 is controlled by the CPU 1117. The read data from the image reading unit 1110 is transmitted to the partner station through the transmission circuit 1113. Data received from the partner station is sent to the printer 1119 through the receiving circuit 1112. Image memory 111
6 stores predetermined image data. A printer controller 118 controls the printer 1119. 11
14 is a telephone.

The image received from line 1115 (line 1
Image information from a remote terminal connected via the CPU 115 is demodulated by the receiving circuit 1112, and then the CPU 111
Reference numeral 7 denotes an image memory 111 for decoding image information and sequentially executing the decoding process.
6 is stored. Then, when an image of at least one page is stored in the memory 1116, the image of the page is recorded. The CPU 1117 reads image information for one page from the memory 1116 and
The decoded image information for one page is sent to the server 18.
Upon receiving one page of image information from the CPU 1117, the printer controller 1118 controls the printer 1119 to record that page of image information.
Note that the CPU 1117 is receiving the next page during recording by the printer 1119.

As described above, image reception and recording are performed.

By the way, the developing means 1104 supplies the developer to the electrostatic latent image on the photosensitive drum 1101 by the rotation of the developing sleeve 1020, and develops the electrostatic latent image. The developing sleeve 1020 is attached to the photosensitive drum 1101
Must be opposed to each other at a predetermined interval.

FIG. 28 is a perspective view showing the positional relationship between the developing sleeve 1020 and the photosensitive drum 1101, and FIG. 29 is a sectional view of the non-driving side end of the developing sleeve 1020.

As shown in FIG. 28, the developing sleeve 102
0 means that the flange members 1022 at both ends are sliding bearings 1
023 so as to be rotatable. At both ends of the developing sleeve 1020, spacer rollers 1021 for keeping a constant distance δ between the surface of the photosensitive drum 1101 and the surface of the developing sleeve 1020 are rotatably provided. The spacer roller 1021 is made of a resin material that is made of a material that is easily slidable.
It is set to be larger than the outer diameter of 20 by twice the separation interval δ (2δ). Therefore, as shown in FIG. 29, by bringing the spacer roller 1021 into contact with the peripheral surface of the photosensitive drum 1101, the distance δ between the surface of the photosensitive drum 1101 and the surface of the developing sleeve 1020 is kept constant.

FIG. 30 is a side view of the developing means 1104, and FIG.
1 is a cross-sectional view of the drive shaft side end of the developing sleeve 1020.

30 and 31, a drive gear 1017 is attached to the flange member 1022 on the drive shaft side, and a drive gear 1018 on the drive shaft 1019 side of the apparatus main body is selectively provided with respect to the drive gear 1017. The developing sleeve 1020 is driven to rotate.

FIG. 32 is a sectional view in the case where a magnet roller 1025 is provided in the developing sleeve 1020. The developing sleeve 1020 is driven to rotate in the direction of arrow A outside the magnet roller 1025 held in a stopped state.
The photosensitive drum 1101 rotates in the direction of arrow B.

"Developing Sleeve Manufacturing Apparatus" FIG. 1 is a side view of a developing sleeve manufacturing apparatus as a cylindrical body, FIG. 2 is a front view of the manufacturing apparatus, and FIG. 3 is a plan view of the manufacturing apparatus. Hereinafter, the cylindrical member forming the main body of the developing sleeve is referred to as a sleeve W2, and the flange member 22 is referred to as a flange W1.

In these figures, 1 is an NC assembling robot, 2 is a robot hand, 3 is a stocker for supplying a flange W1 machined with high precision, and 4 is an end of a sleeve W2 machined with high precision. A high-frequency heating device for heating 5 is connected to a sleeve W from a conveyor line (not shown).
2 is a turntable for loading and unloading 2.

FIG. 4 is a diagram showing a schematic configuration of the robot hand 2. The robot hand 2 includes a horizontal compliance unit (alignment unit) Y1, a horizontal / angle adjustment unit Y2, and a flange gripping unit Y3.
Is attached to the arm 1A.

FIG. 5 is a sectional view of the entire robot hand 2.
FIG. 6 is an enlarged cross-sectional view of the lower part of the robot hand 2.

In FIG. 5, first, the cushion unit 9 includes a rod 8 hanging down from the arm 1A of the robot 1.
A linear sliding member 7 urged downward by a spring 6 is slidably guided in the vertical direction. The robot hand 2 is attached to the linear sliding member 7 and is constantly urged downward. Numeral 10 denotes a horizontal compliance as a unit Y1. For example, as shown in FIG. 7A, a parallel plate-shaped spring 10A allows the horizontal table 10B to be displaced in the horizontal direction, or FIG. Thus, the horizontal displacement of the horizontal table 10B is allowed by the tension spring 10C. When vertical stiffness is required, the compliance shown in FIG. 7B may be used. The centripetal force of the horizontal table 10B by the springs 10A and 10C is preferably 0.1 kg or less.

Reference numeral 11 denotes a lock cylinder, and reference numeral 12 denotes a lock plate, between which a horizontal compliance 10 is formed. Rock slope 12 is horizontal compliance 10
Of the horizontal table 10B. Lock cylinder 11
When the pressurized air is supplied via an electromagnetic valve (not shown), the cylinder rod 13 is projected downward, and the tip of the cylinder rod 13 is fitted into the lock hole 14 of the lock plate 12 so that the lock plate 12 Horizontal compliance 10
Is fixed. Therefore, during the high-speed operation of the robot 1,
By fixing the horizontal compliance 10 in this manner, the robot hand 2 can be positioned without vibrating.

The robot hand 2 has a suction head 151 for vacuum-sucking the flange W1. This suction head 1
A ball screw 150 having a rotatable ball 150 </ b> A is attached to 51, and its suction head 151 is attached to the ball screw 150.
The taper piece 153 is pulled downward by the plurality of suction head lock cylinders 152 mounted on the parallel hand fixing member 1.
7 is fitted and fixed in the fitting hole 17A. That is, the suction head lock cylinder 152 allows the suction head 151
Are drawn into and fixed to the parallel hand fixing member 17.

At the time of starting the insertion of the flange W1, FIG.
, The parallel hand lock cylinder 18 fits and fixes the taper piece 20 in the fitting hole 21, and the suction head lock cylinder 152 fits the taper piece 153 into the fitting hole 1.
7A is fitted and fixed. After the insertion of the flange W1, the parallel hand lock cylinder 18 immediately releases the lock, as shown in FIG. 6B, to allow the relative displacement between the lock plate 12 and the parallel hand fixing member 17, and Then, the suction head lock cylinder 152 performs an unlocking operation to allow relative displacement between the parallel hand fixing member 17 and the suction head 151. Therefore, the flange W1 is joined so as to follow the bore 130 of the sleeve W2.

When the flange W1 is connected, the flange F1 is pressed downward by the force F of the spring 6 of the cushion unit 9, and as shown in FIG.
Is displaced by Δx with respect to the lock plate 12 via the thrust bearing 22, and the suction head 1
The angle 51 is absorbed by Δθ with respect to the parallel hand fixing member 17.

Since the outer diameter of the magnet roller W3 is smaller than the inner diameter of the sleeve W2, if the position of the magnet roller W3 is not fixed in the sleeve W2 and the magnet roller W3 is inclined, the inclination of the magnet roller W3 is reduced. Is large, when the flange W1 is joined, the fine portion of the magnet roller W3 does not enter the inside diameter φd of the flange W1 (see FIG. 19). Therefore, the magnetic roller 114 is used by using the magnetic material 114 installed on the turntable 5 and the magnet roller W3 is attracted by the attractive force between the magnetic material 114 and the magnet roller W3.
3 to one side in the sleeve W2 and the magnet roller W
3 is positioned parallel to the sleeve W2. This allows
Interference between the flange W1 and the magnet roller W2 is avoided and the flange W1
0 can be inserted.

1 to 3, a stocker 3 is a device for supplying a flange W1 to the robot 1 and accommodates pallets 120 shown in FIG. 3 in multiple stages. Are stored in a matrix. The pallet 120 that has been emptied by the supply of the flange W1 to the robot 1 is automatically discharged, and a new pallet 120 on which the flange W1 is spread is set to the supply position instead.

FIG. 8 is a detailed view of the high-frequency heating device 4. In the high-frequency heating device 4, when the sleeve W1 is positioned in the coil 113 by the turntable 5 as described later, a high-frequency current I1 flows through the coil 113. As a result, a magnetic field 121 is generated in the coil 113 (see FIG. 8C), an induced current I2 is generated in the sleeve W2, and the sleeve W2 self-heats. The current I1
, The heating state from the surface of the sleeve W2 located in the coil 113 toward the center can be changed, and there is versatility when the thickness of the sleeve W2 changes.

FIGS. 9 and 10 are detailed views of the turntable 5.

In these figures, 100 is a base plate,
101 is a vertical movement cylinder, 102 is a guide block, and the guide block 102 has a built-in linear bush 103 for guiding a guide bar 104 slidably in the up and down direction. A connecting member 105 that connects to a lower portion of the high rotor block 107 is attached to a tip of a rod of the vertically moving cylinder 101. High rotor block 1
A high rotor 106 is housed in 07. The high rotor block 107 is connected to the guide bar 104 and is moved up and down with high accuracy by the up and down moving cylinder 101. The high rotor 106 is connected to a turntable base 109 via a coupling 108. The turntable base 109 is a cross roller bearing 11
The rotation of the high rotor 106 is transmitted to the turntable 109 with high accuracy.

On the turntable 109, a sleeve W
3 (FIG. 3)
), And a rotary cylinder 112 for pressing the sleeve W <b> 2 to set a circumference is installed in the receiver 111, and the positioning and holding of the sleeve W <b> 2 and the insertion / removal of the sleeve W <b> 2 can be performed according to the operation of the rotary cylinder 112. .

In FIG. 10, reference numeral 113 denotes a coil of the high-frequency heating device 4 described above. The sleeve W2 positioned and held by the receiver 111 and the rotary cylinder 112 is moved up and down by the vertically moving cylinder 101 together with the turntable base 109. Thus, the upper end of the sleeve W2 is located in the coil 113. In FIG. 10, reference numeral 114 denotes a magnetic plate made of iron or the like. When the flange W1 is joined after the magnet roller W3 is inserted into the sleeve W2 as described later, the magnet roller W3 is biased and positioned in the sleeve W2. I do.

The turntable base 109 is driven to rotate by the high rotor 106, and the turntable base 1 is rotated.
When the stopper 115 (see FIG. 10) attached to the abutment 09 contacts the rotational positioning shock absorber 116 (see FIG. 10) fixed to the high rotor block 107, the position of the turntable base 109 in the rotational direction is regulated. You.

FIG. 11 is a block diagram of a control system of the manufacturing apparatus.

In FIG. 11, reference numeral 50 denotes a central processing unit (CPU). Reference numeral 52 denotes a nonvolatile memory (ROM) which is connected to the CPU 50 via a bus and includes a series of control algorithm programs and a man-machine interface program. is there. Reference numeral 54 denotes a power-backed-up memory (RAM) capable of storing teaching data. 5
Reference numeral 6 denotes a counter, which is connected to an encoder 60 connected to a servomotor 58 for driving the robot 1 and counts to detect the current position of the servomotor 58. 6
Reference numeral 2 denotes a D / A converter connected to the servomotor 58 via the torque amplifier 64, and outputs a current instruction to the torque amplifier 64 under the control of the CPU 50. 66
Is an I / O interface for taking in information of the other control device 68 such as the high-frequency heating device 4, the solenoid valve 70, the sensor 72 and the like into the CPU 50. 74 is
The communication interface connects the external teaching device 76, the display device 78, the input keyboard 80, and the CPU 50. ROM 52, RAM 54, counter 5
6, converter 62, interfaces 66 and 74,
It is connected to the CPU 50 by a bus 82.

FIG. 12A is a side view of the flange W1, and FIG. 12B is a side view of the sleeve W2.

In the flange W1, the connecting portion 131 and the projecting portion 134 at the end of the sleeve W2 are machined so as to have high precision roundness of 2 μm and coaxiality of 3 μm. Is given. Further, the outer peripheral portion 133 with which the end face of the holding jig comes into contact is machined so that a high-precision squareness is formed with respect to the coupling portion 131. The end of the sleeve W2 is subjected to inner diameter processing, and the coaxiality of the inner diameter processing hole 130 and the outer diameter of the sleeve W2 is set with high accuracy, and unevenness in uneven thickness as shown in FIG. As shown in FIG. 13A, the thickness is uniform. A preferred range is 10 μm or less. Further, the inner diameter processing hole 130 and the end face 132 of the sleeve W2 are processed so as to form a high-precision squareness.

Therefore, the end surface 151A of the suction head 151 holding the outer peripheral portion 133 of the flange W1 by joining the flange W1 and the sleeve W2 without galling the processed surface (see FIGS. 5 and 6). By contacting the end surface 132 of the sleeve W2 with the end surface 132 of the sleeve W2,
The protrusions 13 of the flange W1 with respect to both ends of the sleeve W2
It becomes possible to determine the coaxiality of No. 4 with high accuracy (to make the flange not fall down).

Next, the operation of connecting the flange W1 and the sleeve W2 will be described.

FIG. 14 is a flowchart for explaining the operation on the robot 1 side, and FIG. 15 is a flowchart for explaining the operation on the turntable 5 side.

First, when the flange W1 is set at the supply position on the stocker 3, the arm 1A of the robot 1 turns, and the suction head 151 of the robot hand 2 moves the flange W1.
1 is clamped (step SA1). Thereafter, the robot hand 2 moves above the coil 113 of the high-frequency heating device 4 (Step SA2), releases the lock of the lock plate 12 by the lock cylinder 11, and waits (Step S2).
A3).

On the other hand, when the sleeve W2 is set on the turntable 5, the operation of the rotary cylinder 112 presses the sleeve W2 against the V-shaped receiver 111 to position the sleeve W2 (step SB1). Then, the high rotor 10
6, the sleeve W2 rotates together with the turntable base 109 and the like (step SB2), and the stopper 115
Abuts on the shock absorber 116. When they come into contact, the sleeve W2 is located below the coil 113. Then, the vertical cylinder 101 is turned on,
Turntable base 109, high rotor block 10
7 and the like, and the upper end of the sleeve W2 is positioned inside the coil 113 as shown in FIG. 16 (step SB)
3). After waiting for such positioning of the sleeve W2, a drive signal is sent to the high-frequency heating device 4, and the coil 113 is energized to start heating. As a result, as described above, the opening of the sleeve W2, that is,
The 0 part self-heats due to the induced current, and its inner diameter processing hole 1
30 expands in diameter due to thermal expansion.

FIG. 17 shows that the upper end of the sleeve W2 is at time t.
FIG. 18 shows the temperature change when heating was performed from FIG.
Shows the relationship between the temperature of the sleeve W2 and the amount of expansion.

The diameter of the bore 130 of the sleeve W2 is increased, so that the connecting portion 1 between the bore 130 and the flange W1 is formed.
31 is a gap-fit relationship from an interference-fit relationship,
As described below, the connecting portion 131 is
Can be inserted into the gap.

After the heating of the sleeve W2 is completed, the coil 11
3 is stopped, and the high-frequency heating device 4
Is sent, and the robot hand 2 descends (step SA4). Thereby, the suction head 151
The flange W1 clamped to the suction head 15 is gradually inserted into the bore 130 of the sleeve W2.
After the end surface 151A of the suction head 151 abuts against the fine surface 132 of the sleeve W2, the end surface 151A of the suction head 151 is moved to the end surface 1 of the sleeve W2 by the force of the spring 6 in the cushion unit 9.
32.

When the axes of the flanges W1 are displaced when the flanges W1 are inserted into the sleeve W2, if the deviations are within a range corresponding to the chamfering, the deviations are absorbed by the horizontal compliance 10 and the flanges W1 are removed. The coupling portion 131 is smoothly formed in the inner warp hole 13 of the sleeve W2.
Inserted in 0. When the insertion of the flange W1 is started, as shown in FIG.
8 fixes the taper piece 20 in the fitting hole 21 and immediately after the insertion of the flange W1, the parallel hand lock cylinder 18 immediately releases the lock as shown in FIG. 16B (step SA5), and the lock plate 12 and the parallel hand fixing member 17 are allowed to move relative to each other (step SA).
6).

Further, by releasing the parallel hand lock (step SA5) and the parallel clamp release (step SA6) in the robot hand 2, the flange W1 becomes
The position is regulated by being pressed by the end surface 132 of the sleeve W2,
At the same time, the normal temperature flange W1
The bonding is completed when the temperature of the upper end of the second member approaches. In this way, high-precision coupling according to the processing accuracy of the flange W1 and the sleeve W2 is performed.

After the completion of such connection, the robot hand 2 is raised (step SA7), and the lock plate 12 and the parallel hand fixing member 17 are locked by the locking operation of the parallel hand lock cylinder 18. At the same time, the end signal of the insertion of the flange W1 is sent to the turntable 5, and the turntable 5 turns off the vertical movement cylinder 101 and descends (step SB4), and after the high rotor 106 rotates to the discharge station of the sleeve W2 ( In step SB5), the rotary cylinder 112 is turned off to release the sleeve W2 (step SB6).
The sleeve W2 is discharged (step SB7). On the other hand, the robot hand 2 locks the horizontal compliance 10 with the lock cylinder 11, and then moves at high speed onto the stacker 3 to clamp the next flange W1 (step SA9).

The heating device 4 is not limited to a high-frequency heating device, but may be a device heated by a cartridge heater, a halogen lamp, a xenon lamp, or the like.

In the apparatus for manufacturing a developing sleeve of a laser beam printer as in the present embodiment, the concentricity of the sleeve W1 after coupling with the outer diameter of the sleeve W2 is within 15 micrometers. The material of the sleeve W2 and the flange W1 may be a shrink-fitting metal such as Al or Fe. In addition, the present invention provides an 8 mm VT that requires high-precision assembly in addition to a developing sleeve of a laser beam printer.
The present invention can also be applied to an assembly of an R drum, a manufacturing apparatus of a polygon mirror, and the like.

(First Example) In the developing sleeve of this example, a flange is shrink-fitted at one end of the sleeve by the manufacturing apparatus of the first embodiment described above, and then another sleeve is formed at another end of the sleeve. It was manufactured by press-fitting a flange. Jig 15
The perpendicularity of the end surface 151A of the first to the axis of the flange W1 was 2 μm.

Using an aluminum alloy extruded drawn tube as a material, the sleeve W2 has an outer diameter of 12 mm, an inner diameter of 10.4 mm,
It is 246 mm long and has an inner diameter of 1 at one end of the machined surface.
An inner diameter processing hole 130 having a length of 0.610 mm and a length of 5 mm was cut. As shown in FIG.
When the sleeve W2 was rotated while holding the positions A and B at both ends as shown in FIG. 2 (c), the deflection at the point a, that is, the in-row deflection was 8 μm, and the squareness of the end face was 3 μm. And
The sleeve W2 was set in the above-described manufacturing apparatus of the first embodiment with the inner diameter processing hole 130 facing upward. On the other hand, the flange W1 has an outer diameter of 10.61
8 mm, and the length of the joint 131 was 2.5 mm.

When the flange W1 is connected to the sleeve W2, the high-frequency heating device 4 is used to supply a coil power of 0.7%.
kw, 5 m from the upper end of sleeve W2 as 1 second of energization time
By heating the range of m to about 200 ° C., the inner diameter processing hole 130 of the sleeve W2 was expanded by 42 μm. And the flange W
1 was inserted into the sleeve W2 and joined.

As shown in FIG. 20 (b), the developing sleeve material in which the flange W1 is connected to one end of the sleeve W2 (on the side of the bore 130) is connected to the sleeve W2 as shown in FIG.
Of the flange W1 when rotating while holding the positions A and B of both ends of the flange W1 was measured. The deflection is 10 μm
Met. Also, a force of 16 kg was required to forcibly pull out the flange W1 from the sleeve W2.

Further, such a developing sleeve material was subjected to sandblasting as shown in FIG. In FIG. 21, W is a developing sleeve material, 208 is a blast nozzle for discharging abrasive grains 211, and 210 is an upper and lower masking jig, which sprayed the abrasive grains 211 while rotating the developing sleeve material. The sandblast conditions are shown below.

Abrasive grains; alumina powder (# 10, manufactured by Showa Denko KK)
0) Discharge pressure: 2.8 kg / cm2 Nozzle distance: 120 mm Blasting time: 60 seconds Sleeve rotation speed: 60 rpm After that, blast treatment (Ra = 2 to 2.5 μm)
m) A coating layer 212 is formed by spraying a coating material 212 for improving the charging property from a spray 211 on the developed developing sleeve material W as shown in FIG.
The coating was thermally cured by placing it in a drying oven at 150 ° C. for about 30 minutes. The paint 212 was prepared by adding a MEK solvent to a solid content of 1 part by weight of conductive carbon, 90 parts by weight of graphite (average abrasive grains: 7 μm), and 100 parts by weight of phenol resin.
The mixture was adjusted to 0%, put into a paint shaker (paint mixing device) together with the glass beads, and adjusted by performing dispersion for 5 hours.

Thereafter, as shown in FIG. 23, the magnet roller W3 is inserted into the developing sleeve material W having the flange W1 connected only to one end of the sleeve W2, and then the other end of the sleeve W2 is inserted. Was press-fitted with a flange W4 to complete the developing sleeve. As described above, after the resin applied to the surface of the sleeve W2 is heated and cured, the magnet roller W3 is incorporated to avoid a change in the magnetic force curve and thermal deformation of the magnet roller W3 due to heat during the heating and curing.

The developing sleeve completed in this manner was mounted on a process cartridge of a laser beam printer manufactured by Canon Inc. to form an image. As a result, a good image was obtained without problems such as pitch unevenness due to the sleeve W2. Was.

Note that instead of forming the unevenness by the blasting process in FIG.
It is also possible to add spherical particles of 1 μm to 30 μm to form irregularities. As the spherical particles, spherical particles such as nylon, silicone, phenol, polyethylene, polymethyl methacrylate, and polyethylene are used. The surface roughness can be controlled by changing the amount of the spherical particles added, the particle size of the spherical particles, and the like. If the particle size is 1 μm or less, the desired surface roughness cannot be obtained,
If it is 30 μm or more, the particle size is too large, and the adhesion to the resin becomes poor.

(Second Embodiment) A flange W is attached to one end of a sleeve W2 by using the same material and the same method as in the first embodiment.
1 to form a developing sleeve material. The inner diameter fringe loaf was 7 μm, and the perpendicularity of the end face was 4 μm. After that, a blast treatment and a coat layer for improving the charging property were formed in the same manner as in the first embodiment. However, the coating material for forming the coating layer was 10 parts by weight of conductive carbon and graphite (average abrasive grains 7 μm).
90 parts by weight, PMMA spherical particles (average particle size 10 μm),
And 100 parts by weight of a phenol resin, and the mixture was adjusted with a paint shaker in the same manner as in the first embodiment.

Thereafter, similarly to the above-described embodiment, the magnet roller W3 was inserted into the sleeve W2, and the flange W4 was pressed into the other end of the sleeve W2 to complete the developing sleeve.

An image was formed by using the developing sleeve thus completed in the same manner as in the first embodiment, and a good image was obtained.

(Third Embodiment) In the developing sleeve of this embodiment, the flange is shrink-fitted to the other end of the sleeve in which the flange is connected to one end of the sleeve by the manufacturing apparatus of the first embodiment. It was manufactured by doing.

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1 mm.
It is an aluminum alloy extruded and drawn cylindrical tube having a length of 8.4 mm and a length of 330 mm which has been subjected to centerless processing. A flange having a through hole having an inner diameter of 8 mm is connected to one end of the tube. The other end of the sleeve W2 has an inner diameter of 18.635.
An inner diameter processing hole 130 mm and a length of 4 mm was cut.
The sleeve W2 thus cut is shown in FIG.
When the sleeve W2 is rotated while holding the positions A and B at both ends as shown in FIG.
m, and the squareness of the end face was 4 μm.

Then, the coating liquid was coated on the sleeve W2 having the flange joined to one end in the same manner as in the second embodiment.

Thereafter, as shown in FIG. 24, the manufacturing apparatus of the first embodiment inserts the magnet roller W3 into the sleeve W2 and holds the magnet roller W3 at the other end of the sleeve W2 while positioning and holding the magnet roller W3. Internal bore 1
30 was fitted with a flange W1. The flange W1 is
The outer diameter of the joint 131 is 18.645 mm, and the joint 1
The length of 31 was 5.5 mm, and the inside diameter of the through hole through which the end of the magnet roller W3 penetrated was 10 mm. Flange W
1 and the sleeve W2, the high-frequency heating device 4
As a result, the inner diameter processing hole 130 at the other end of the sleeve W2 is heated to about 200 ° C. with an electric power of 2 kW and an electric current of 1 second.
The diameter was expanded by 5 μm. Then, the flange W1 is connected to the sleeve W2.
And ligated.

As shown in FIG. 20 (b), the developing sleeve material having the flange W1 connected to one end side (inner diameter processing hole 130 side) of the sleeve W2 as shown in FIG.
Of the flange W1 when rotating while holding the positions A and B of both ends of the flange W1 was measured. The deflection is 11μm
Met. Further, in order to forcibly pull out the flange W1 from the sleeve W2, a force of 30 kg or more was required.

Using the developing sleeve thus completed in the same manner as in the first embodiment described above, a good image was obtained.

(Fourth, fifth and sixth embodiments) FIG. 25 shows data on the fourth, fifth and sixth embodiments as the developing sleeve. These embodiments are produced by changing the dimensions of the interference, etc., in the third embodiment described above. In addition, Comparative Examples 1 to 5 were also prepared and evaluated. As described above, according to the first embodiment, as the developing sleeve, the run-out of the coupled flange can be set to 15 μm or less, and in the connection with the means for rotating and driving the developing sleeve. In addition, the occurrence of run-out of the entire developing sleeve can be reduced, and a good image can be obtained.

Further, by using the developing sleeve of the first embodiment as a developing device, there is little occurrence of runout in connection with the means for rotating and driving, and the gap between the developing sleeve and the photosensitive drum is reduced. And a good image can be obtained.

(Second Embodiment) Hereinafter, a second embodiment will be described.

As already described in the section of "Background Art and Outline" of the first embodiment, there are some problems in the conventional method of manufacturing a cylindrical body.

In order to solve these problems, the inventors of the present invention have made intensive studies and found that the cylindrical member is made of a thermoplastic resin having a fitting portion having a larger diameter than the inside of the fitting portion and the inside diameter thereof. The inside of the end of the member and the connecting portion of the flange member are set to have a size that has an interference fit, and the end portion or the entirety of the cylindrical member is predetermined so as to have the relationship of the fitting with the connecting portion of the flange member. After being heated to the temperature to expand the diameter, the flange member is fitted, and the shaft portion of the flange is moved so that the shaft portion of the flange is aligned with respect to the axis outside the cylindrical body. The flange fitting part is heat-melted and fitted so that it is located at the center of the end fitting part, and then
It has been found that a method of cooling the end portion or the whole of the cylindrical member and fixing the position is effective.

Generally, a developing sleeve as a cylindrical body is
In order to develop a latent image on a latent image carrier formed by an electrophotographic method, an electrostatic recording method, or the like, a magnet roller is inserted therein. This is for transporting the developer by magnetic force, and the thickness of the cylindrical member in the developing sleeve is 0.5 mm to 2.0 mm due to the magnetic force of the magnet roller.
mm. Further, the coupling strength of the flange member in the developing sleeve needs to be 5 kg to 50 kg due to the relationship between the bending and detachment of the flange due to the driving rotation, and it has been found that the following dimensions are effective from this point.

That is, the interference between the joints is 0.1 mm of the reference inner diameter.
A range of 04-0.2% is required. The bond length is
The range is 1 mm to 6 mm from the viewpoint of preventing the flange member from falling down after the connection and securing the connection strength. If the coupling interference is 0.04% or less of the reference inner diameter, the required bonding strength cannot be obtained, and if the coupling interference is 0.2% or more of the reference inner diameter, the strength becomes more than necessary. If the connection length is less than 1 mm, the flange after connection may fall down,
It is unnecessary to set it to m or more.

The diameter of the cylindrical member expanded by heating is preferably in the range of 0.3 to 0.5% of the reference inner diameter. When the diameter is 0.3% or less, the contact between the cylindrical member and the flange member causes the flange member to bend. If the heating temperature is 0.5% or more, the heating temperature becomes too high, and the material may be thermally degraded.

In order to obtain a good image by using the developing sleeve, it is preferable that the runout of the flange member be 15 μm or less. By setting the precision to 15 μm or less, it is possible to suppress the occurrence of runout of the entire developing sleeve in connection with the means for rotating and driving the developing sleeve. Conventionally, to obtain such accuracy,
It was necessary to set the spigot run-out at the joint portion of the cylindrical member to 10 μm or less and the perpendicularity to the end face to 5 μm or less. Further, it was necessary to set the runout of the flange member alone to 5 μm or less. Due to such coupling conditions, the runout of the flange member was 15 μm or less. In addition, in order to obtain a good latent image using the photosensitive drum, it was preferable that the runout of the flange member be 20 μm or less. 20
By setting the precision to be equal to or less than μm, the occurrence of vibration of the entire photosensitive drum is suppressed in connection with the means for rotating and driving the photosensitive drum. However, in order to obtain such accuracy, the inner diameter runout (inset runout) of the connecting portion of the cylindrical member is set to 10 μm or less, and the perpendicularity of the end face is set to 1 μm.
It is necessary that the thickness be 0 μm or less. Further, it was necessary to set the runout of the flange member alone to 5 μm or less.
Further, a precise robot hand device for connecting the flanges and a complicated mechanism for preventing axis misalignment were required.

However, in the present embodiment, the accuracy of the flange alone is not so required, and the coaxiality is not more than 60 μm, the cylindricity of the fitting portion is not more than 70 μm, and the pipe thickness is not more than 300 μm. What is necessary is that a mechanism for leveling out with a perpendicularity of the contacting part being 2 to 3 μm or less.

The cylindrical body such as the developing sleeve and the photosensitive drum should have a preferable bonding strength even in any environment such as high temperature, high humidity, and low temperature and low humidity in consideration of the environmental conditions of the copying machine or printer provided with the cylinder. In some cases, the cylindrical member and one of the flange members are made of the same material. Especially,
Aluminum is preferable from the viewpoint of lightness and workability. However, aluminum has a drawback that it is easily deformed by heat under high-temperature thermal conditions. Therefore, the diameter expansion range of the cylindrical member made of aluminum is set to 0.3 to 0.
It is necessary to suppress the heating temperature so as to be 5%.

In the developing sleeve, one of the two flange members connected to both ends of the cylindrical member is used as a plastic flange. Therefore, it is necessary to make the flange member highly accurate. In such a case, it is necessary to couple the flange member with the magnet roller housed inside the cylindrical member. In this case, one flange member is connected to one end of the cylindrical member, and the other end of the cylindrical member and the other flange member are processed simultaneously or separately by cutting or centerless grinding to prepare a cylindrical member having good coaxiality. Then, a magnet roller is inserted into the inside of the cylindrical member, and the other flange member is connected to the other end of the cylindrical member. When the flange member is connected to the cylindrical member in the presence of the magnet roller in the cylindrical member, the heating temperature of the cylindrical member is reduced in order to avoid the fluctuation of the magnetic force of the magnet roller due to the heating for expanding the diameter of the cylindrical member. Need to be suppressed. If there is a change in the magnetic force of the magnet roller, the image deteriorates. From such a necessity, the diameter expansion range of the cylindrical member is set to 0.
3 to 0.5%. By setting the heating temperature to 200 ° C. or less, the change in the magnetic force of the magnet roller can be suppressed.

In summary, according to the present embodiment, the cylindrical member and the flange member which are in a close-fitting relationship are expanded by heating the connecting portion of the cylindrical member to make them have a gap-fitting relationship and then fitted. By transmitting the heating temperature of the cylindrical member to the flange member and melting and softening the fitting part, and aligning, the center of the shaft part of the cylindrical member and the flange member and the center of the outer diameter of the sleeve are matched to join. Increase flange runout accuracy.

That is, in the shape of the flange holding jig, by forming a shape having a portion larger than the outer diameter of the connecting portion of the flange member, a predetermined temperature is established so as to have a relationship of fitting with the connecting portion of the flange member. After being heated and expanded, the end of the cylindrical member is inserted into the end of the cylindrical member while being aligned with the axis of the cylindrical member during cooling of the end of the cylindrical member, and the preservation is performed on the end surface of the cylindrical member. When the end face of the jig abuts, high accuracy can be obtained by the same operation and effect as the flange portion of the flange with flange.

Further, even when there is no high-accuracy spigot portion, the position of the outer-diameter axis of the pipe and the axis of the flange are accurately matched by a high-precision robot hand. Even when the coaxiality of the flange shaft portion and the fitting portion is misaligned, the heat of the pipe spigot portion is transmitted to the fitting portion of the flange, and the thermoplastic resin in that portion melts and softens, thereby joining the flange shaft core. Can move to a position that coincides with the axis of the pipe outer diameter. At this time, if the entire flange is made of a thermoplastic resin, the entire flange may be softened depending on the heating conditions. Therefore, it is preferable that the thermoplastic resin is only the fitting portion of the flange, and the shaft portion of the flange is made of a non-thermoplastic resin or a metal such as aluminum.

According to such a joining method, there is no variation in flange joining accuracy due to variation in the perpendicularity of the end face of the flange with a flange or variation due to uneven thickness of the pipe spigot portion, so that stable accuracy is obtained and the process capability is improved. Here, the outer diameter of the flange holding jig is
It is necessary that the outer diameter of the fitting portion of the flange be larger than that of the fitting portion of the flange, and that the fitting portion of the flange be made of a thermoplastic resin that melts and softens at a temperature of 150 to 200 ° C.

150 ° to 200 ° used in the present embodiment
As the thermoplastic resin that melts and softens at a temperature of ° C., a generally known resin can be used, but preferably, the strength,
From the viewpoint of fatigue resistance, positive wear resistance and moldability, thermoplastic engineering plastics are preferable, and homopolymers and copolymers of polycanad and polyacetal are particularly preferable.

In the second embodiment, the “entire configuration of the image forming apparatus” and the “developing sleeve manufacturing apparatus” are the same as those in the first embodiment, and therefore the description thereof is omitted.

The second embodiment differs from the first embodiment in that the accuracy of the flange W1 and the sleeve W2 does not need to be as high as in the first embodiment, and that the material of the flange W1 is different.

Hereinafter, a specific example of the method of manufacturing the developing sleeve according to the second embodiment will be described.

(First Example) In the developing sleeve of this example, a flange was shrink-fitted to one end of the sleeve by the manufacturing apparatus of the first embodiment described above. At this time, the perpendicularity of the end face 151 of the flange holding jig (suction head 151) was 2 μm.

The sleeve W2 made of an aluminum alloy extruded and drawn tube has an outer diameter of 20 mm and an inner diameter of 18.500.
mm, 335mm in length, no inlay processing, 50μm thickness unevenness at the end, ie 50
μm, and the perpendicularity of the end face is 5 μm. This sleeve W2
Was set in the manufacturing apparatus of the first embodiment.

On the other hand, the outer diameter of the fitting portion 131 of the flange W1 was 18.530 mm, and the length of the fitting portion was 5 mm. This flange W1 is, as shown in FIG.
Is made of an aluminum alloy, and the fitting portion F1 is made of a thermoplastic resin polyacetal. The coaxiality of the shaft portion and the fitting portion of this flange is 40 μm, and the cylindricity of the fitting portion is 35 μm.

At the time of joining the flange W1 and the sleeve W2, the high-frequency heating device 4 energizes the coil for 1 sand,
Heating a range of 5 mm at the upper end of the sleeve W2 to about 180 ° C. with an energizing power of 1 kW, and adjusting the inner diameter of the sleeve W2 to 32 μm
m. Then, the flange W1 was inserted into the sleeve W2 and joined. At this time, the axis of the shaft portion of the flange W1 is set to a position that matches the axis of the outer diameter of the sleeve W2,
The axis of the flange W1 and the axis of the outer diameter of the sleeve W2 are matched regardless of the degree of coaxiality of the flange W1 and the degree of uneven thickness of the sleeve W1.

Further, the obtained sleeve is coated with a carbon + resin layer in order to improve charging performance. It is made of conductive carbon, graphite (average particle size 7μ).
m), a phenol resin was mixed, an IPA solvent was added to adjust the solid content to 35%, and the mixture was put together with glass beads in a paint shaker, and the mixture was dispersed for 5 hours. A developing layer is formed by spraying the blast sleeve processed by the apparatus shown in FIG. 21 to form a coat layer, and placing the coated layer in a drying oven at 150 ° C. for about 20 minutes to thermally cure the coating film.

After the sleeve was turned in the opposite direction and the magnet roller was inserted, a similar flange W1 was similarly connected to the other end.

As shown in FIG. 20, with respect to the developing sleeve in which the flanges W1 are coupled to both ends of the sleeve, the positions of the ends A and B of the sleeve W2 are rotated as shown in FIG. When the deflection at the position a was measured, the deflection was 10 μm on both sides.

Thereafter, this developing sleeve was mounted on a process cartridge of a laser beam printer manufactured by Canon, and 10,000 images were output as an initial image and intermittently. As a result, the sleeve was placed on both halftone and black and white images. A very good image was obtained without problems such as pitch unevenness caused by the above.

(Second Embodiment) In the second embodiment, the outer diameter of the sleeve is 12 mm, the inner diameter is 10.400 mm, and the length is 246.
mm, unevenness in wall thickness at the end is 60 μm, and squareness at the end face is 6 μm.
m. Outer diameter of fitting part of flange to be connected is 10.43
0 mm, the coaxiality of the shaft portion and the fitting portion is 20 μm, the cylindricity of the fitting portion is 45 μm, and the fitting portion F1 is a thermoplastic resin and the shaft portion F3 is a non-thermoplastic resin as shown in FIG. The one made of was used.

A resin layer was coated on the surface of the developing sleeve in the same manner as in Example 1, and after inserting a magnet, a flange was connected. The flange runout on both sides after the connection was 8 μm and 11 μm, respectively.

This developing sleeve was mounted on a process cartridge of a laser beam printer manufactured by Canon, and 10,000 images were output by an initial image and intermittent. As a result, pitch unevenness due to the sleeve was observed on both halftone and solid black images. And a very good image was obtained.

(Third Embodiment) Outer diameter 30 mm, inner diameter 28.
400mm, length 280mm, thickness unevenness at the end is 8
After ultrasonic cleaning a drum cylinder having an end face perpendicularity of 5 μm with a solvent of 0 μm using a solvent, 4 parts by weight of a titanyl phthalocyanine pigment and a polyvinyl butyral resin (trade name: BX)
-1, Sekisui Chemical Co., Ltd.) 2 parts by weight, cyclohexanone 3
After dispersing the solution consisting of 4 parts by weight in a sand mill for 8 hours, 60 parts by weight of tetrahydrofuran was added to prepare a dispersion for the charge generation layer.

This dispersion was diluted by adding 100 parts by weight of cyclohexanone and 100 parts by weight of tetrahydrofuran.
It was applied by dip coating on the cylinder and dried by heating at 90 ° C. for 10 minutes to form a 0.2 μm-thick charge generating layer.

Next, 50 parts by weight of a styryl compound having a structure shown in FIG. 36 and a polycarbonate resin (trade name:
A solution prepared by dissolving 50 parts by weight of Iupilon Z-200 (manufactured by Mitsubishi Gas Chemical Co., Ltd.) in 400 parts by weight of monochlorobenzene is applied onto the charge generation layer by dip coating, heated and dried at 120 ° C. for 1 hour, and transported with a thickness of 20 μm. An electrophotographic photosensitive member was obtained by forming a layer.

A flange was connected to this photosensitive drum in the same manner as in Example 1. The outer diameter of the fitting portion of the flange to be connected is 28.
450 mm, the coaxiality of the shaft part and the fitting part was 60 μm, the cylindricity of the fitting part was 75 μm, and the flange used was one whose fitting part was made of thermoplastic resin and whose shaft part was made of SUS (stainless steel).

The flange runout on both sides after the connection was 24 μm and 28 μm, respectively.

This photosensitive drum was mounted on a process cartridge of a laser beam printer manufactured by Canon, and 10,000 images were output by intermittent initial images and intermittent images. A very good image was obtained without such problems.

(First Comparative Example) In the developing sleeve of this comparative example, a flange was heat-fitted to the end of the sleeve by the manufacturing apparatus of the first embodiment described above. At this time, the perpendicularity of the end surface 151A of the flange holding fixture (suction head 151) was 3 μm.

A sleeve W2 made of an aluminum alloy extruded and drawn tube has an outer diameter of 20 mm and an inner diameter of 18.500.
mm, 335mm in length, without inlay processing, 45μm in thickness unevenness at the end, ie 45 in indentation runout
μm, and the perpendicularity of the end face is 6 μm. This sleeve W2
Was set in the manufacturing apparatus of the first embodiment. On the other hand, the flange W1 has the outer diameter of the fitting portion 131 of 18.530 mm,
The length of the fitting portion was 5 mm. The flange W1 is made of an aluminum alloy at both the shaft fitting portion. The coaxiality of the shaft portion and the fitting portion of this flange was 40 μm, and the cylindricity of the fitting portion was 50 μm.

At the time of joining the flange W1 and the sleeve W2, the high-frequency heating device 4 energized the coil for 1 second,
By heating the range of the upper end 5 mm of the sleeve W2 to about 180 ° C. as 1 kW of energizing power, the inner diameter of the sleeve W2 is reduced to 42 μm.
m. Then, the flange W1 was inserted into the sleeve W2 and joined.

Further, the obtained sleeve is coated with a carbon + resin layer in order to improve charging performance. It is made of conductive carbon, graphite (average particle size 7μ).
m), a phenol resin was mixed, an IPA solvent was added to adjust the solid content to 35%, and the mixture was put together with glass beads in a paint shaker, and the mixture was dispersed for 5 hours. A developing layer is formed by spraying the above-mentioned blast sleeve to form a coat layer and placing the coat layer in a drying oven at 150 ° C. for about 20 minutes to thermally cure the coating film.

Then, after the sleeve was turned in the opposite direction and the magnet was inserted, a similar flange W1 was similarly connected to the other end.

As shown in FIG. 20, with respect to the developing sleeve in which the flange W1 is connected to both ends of the sleeve, the position of the both ends of the sleeve W2 and the position of the flange W1 are rotated as shown in FIG. When the shake at the position a was measured, the shake was 120 μm on both sides.

Thereafter, this developing sleeve was mounted on a process cartridge of a laser beam printer manufactured by Canon and an initial image was formed. As a result, the pitch unevenness caused by the sleeve occurred on both the halftone and black and white images, and the image was extremely uneven. Poor image.

(Second Comparative Example) In a second comparative example, the outer diameter of the sleeve is 12 mm, the inner diameter is 10.400 mm, and the length is 246.
mm, thickness unevenness of the end portion is 62 μm, and end surface perpendicularity is 6 μm.
m, and the outer diameter of the fitting portion of the flange to be connected is 10.430
mm, the coaxiality of the shaft portion and the fitting portion was 23 μm, and the cylindricity of the fitting portion was 42 μm, and the flange was entirely made of an aluminum alloy.

The surface of the developing sleeve was coated with a resin layer, and after inserting the magnet, the flange was joined.

The flange runout on both sides after the connection was 85 μm and 130 μm, respectively.

This developing sleeve was mounted on a process cartridge of a laser beam printer manufactured by Canon, and initial image formation was performed. As a result, pitch unevenness due to the sleeve occurred on both halftone and solid black images. The image was unclear.

(Third Comparative Example) The outer diameter was 30 mm and the inner diameter was 2
8. A drum cylinder having a thickness of 400 mm, a length of 280 mm, a thickness variation of 80 μm at the end and a perpendicularity of the end face of 5 μm was subjected to ultrasonic cleaning with a solvent, and then 4 parts by weight of titanyl phthalocyanine pigment, polyvinyl butyral resin (trade name) :
BX-1, manufactured by Sekisui Chemical Co., Ltd.) and a solution composed of 34 parts by weight of cyclohexanone were dispersed in a sand mill for 8 hours, and then 60 parts by weight of tetrahydrofuran was added to prepare a dispersion for the charge generation layer.

The dispersion was diluted with 100 parts by weight of cyclohexanone and 100 parts by weight of tetrahydrofuran.
It was applied by dip coating on the cylinder and dried by heating at 90 ° C. for 10 minutes to form a charge generation layer having a thickness of 0.2 μm.

Next, 50 parts by weight of a styryl compound having a structure shown in FIG. 36 and a polycarbonate resin (trade name:
A solution prepared by dissolving 50 parts by weight of Iupilon Z-200 (manufactured by Mitsubishi Gas Chemical Co., Ltd.) in 400 parts by weight of monochlorobenzene is applied onto the charge generation layer by dip coating, heated and dried at 120 ° C. for 1 hour, and transported with a thickness of 20 μm. An electrophotographic photosensitive member was obtained by forming a layer.

A flange was connected to this photosensitive drum in the same manner as in the first embodiment. Outer diameter of fitting part of flange to be connected is 2
8.450 mm, the coaxiality of the shaft portion and the fitting portion was 60 μm, the cylindricity of the fitting portion was 75 μm, and the flange used was one whose fitting portion was made of an aluminum alloy and whose shaft portion was made of SUS.

The flange runout on both sides after the connection was 180 μm and 200 μm, respectively.

When this photosensitive drum was mounted on a process cartridge of a laser beam printer manufactured by Canon and an initial image was formed, pitch unevenness occurred due to flange vibration on both halftone and black and white images.

FIG. 37 shows a table summarizing the results of the first to third examples and the first to third comparative examples.

As described above, according to the second embodiment, the following effects can be obtained. (1) A high-precision flange or a high-precision pipe with a spigot is not required, and a resin-made flange member can be joined with high accuracy after inserting a magnet roller. Good accuracy. Therefore, when such a high-precision cylindrical member is used for a developing sleeve or the like, a delicate color tone such as halftone can be faithfully reproduced, and a high-definition and high-quality image can be obtained. (2) The cost is reduced because a resin flange is used, which does not require a tube spigot portion and has relatively rough accuracy. The apparatus only needs to have a mechanism for leveling the flange portion, and does not require a very complicated mechanism.

(Third Embodiment) Prior to the description of the third embodiment, a background art and an outline of the third embodiment will be described below.

[Background Art and Outline] Conventionally, various methods of joining a cylindrical member and a flange member with high precision without bending the flange member have been tried.

For example, Japanese Unexamined Utility Model Publication No. 56-154007 discloses a roll in which a plurality of holes are provided on the outer periphery of a fitting portion of a flange member, and a cylindrical member is caulked and joined. Japanese Patent Application Laid-Open No. Hei 7-79862 discloses a roll in which an annular groove is provided at the end of a flange member and the end of a cylindrical member is swaged into the groove.
Japanese Patent Application Publication No. 5504 discloses a roll in which a cylindrical member is subjected to spigot processing, a flange member having a fitting portion smaller than the inner diameter of the spigot is inserted, and joined by an adhesive.

However, in these methods, a displacement at the time of flange insertion and a displacement after coupling occur due to a coupling method and a gap between the cylindrical portion and the flange, and are not perfect in terms of accuracy and coupling strength. Was.

When the outer diameter of the fitting portion of the flange is larger than the inner diameter of the cylindrical member, if the fitting portion of the flange member is made of resin, unlike the case of aluminum when press-fitting, galling occurs. Can be press-fitted.

However, if the positional relationship between the inner diameter of the fitting portion of the cylindrical member and the outer diameter of the fitting portion of the flange member is proper at the time of press-fitting, the cylinder enters straight and the end of the cylindrical member and the flange member. However, in practice, it is extremely difficult to maintain a proper positional relationship on the order of several microns to several tens of microns.

Therefore, in order to solve the above-described problem, the positional deviation between the fitting portion of the cylindrical member and the fitting portion of the flange member is adjusted at the time of flange press-fitting so that the flange member does not fall. In this way, it is necessary to securely contact and press the end surface of the cylindrical member and the facing portion of the flange member.

Next, the third embodiment will be described by dividing it into a “photosensitive drum manufacturing apparatus” and a “specific example of a photosensitive drum manufacturing method”. In addition, regarding the overall configuration of the image forming apparatus,
The description is omitted because it is the same as the first and second embodiments.

FIG. 38 is a front view of a photosensitive drum manufacturing apparatus as a cylindrical body, FIG. 39 is a side view of the apparatus, and FIG. 40 is a plan view of the manufacturing apparatus.

Hereinafter, the above-described cylindrical member of the photosensitive member is referred to as a photosensitive member W2, and the flange member is referred to as a flange W1.

In these figures, reference numeral 501 denotes a robot hand, and FIG. 41 shows a schematic configuration of the robot hand 501.

The robot hand 501 includes a horizontal compliance unit (alignment unit) Y11, a horizontal / angle adjustment unit Y12, and a flange holding unit Y13, and is connected to the air cylinder 502 via the cushion unit 503. I have. 504
And 505, a guide when the robot hand 501 moves up and down, and 506, a positioning plate when the photosensitive drum W2 is installed in the apparatus.

FIG. 42 is an overall sectional view of the robot hand 501, and FIG. 43 is an enlarged view of a lower portion of the robot hand 501.

In FIG. 42, first, a linear sliding member 508 urged downward by a spring 507 is slidably guided in a vertical direction at the tip of a piston rod 502A of a pressurizing air cylinder 502 at an upper portion of the cushion unit 503. ing. The lower part of the robot hand 501 is attached to the linear sliding member 508, and is constantly urged downward.

Reference numeral 510 denotes a horizontal compliance as a unit Y11. For example, as shown in FIG. 44A, a horizontal table 510B is provided by a parallel plate spring 510A.
44 that allows horizontal displacement of
The horizontal displacement of the horizontal table 510B is allowed by the tension spring 510C as shown in FIG. When rigidity in the vertical direction is required, the compliance shown in FIG.

The centripetal force of the horizontal table 510B by the springs 510A and 510C is preferably 0.1 kg or less.

Reference numeral 511 denotes a lock cylinder, and 512 denotes a lock plate, between which a horizontal compliance 510 is formed. The lock plate 512 corresponds to the horizontal table 510B of the horizontal compliance 510 in FIG.

When the pressurized air is supplied through a solenoid valve (not shown), the lock cylinder 511 protrudes the cylinder rod 513 downward, and the tip of the cylinder rod 513 is fitted into the lock hole 514 of the lock plate 512 to thereby lock the lock plate. 51
2, that is, the horizontal compliance 510 is fixed.
Therefore, even if the apparatus moves at high speed and the robot hand moves up and down, the robot hand can be positioned without vibrating by fixing the horizontal compliance 510 in this manner.

Reference numeral 515 denotes a parallel hand, and the flange W1
Is installed. 51
Reference numeral 7 denotes a parallel hand fixing member, which fixes the parallel hand 515 and a plurality of parallel hand lock cylinders 51.
8 is attached.

At the upper end of the parallel hand lock cylinder 518, a taper piece 520 is attached. When the pressurized air is supplied through a solenoid valve (not shown), the parallel hand lock cylinder 518 is provided with a tapered piece 520.
Is pulled downward, and the tapered piece 520 is fitted into the fitting hole 521 of the lock plate 512, whereby the parallel hand 515 is pulled into and fixed to the lock plate 512. Also, the lock plate 512 and the parallel hand fixing member 51
7, a thrust bearing 522 is interposed therebetween, and the inclination of the parallel hand 515 is corrected by the retraction operation of the parallel hand lock cylinder 518.

Further, the parallel hand fixing member 517 has the structure shown in FIG.
As shown in FIG. 3, a pressing support member 523 is attached in order to press the flange W1 into the photoconductor W2 and press it.

A screw ball 524 having a rotatable ball 524A is attached to the support member 523.

The mounting position of the screw ball 524 almost coincides with the center of the parallel hand 515, and
5 grips the flange W1, the flange W1
Of the shaft.

As shown in FIG. 46, in the flange W1, the coupling portion 631 coupled to the processing hole 630 at the end of the photosensitive drum W2 and the convex portion 634 at the tip end have a highly accurate roundness and coaxial shape, respectively. It is made to have a certain degree.

The portion 633 which comes into contact with the end face 632 of the sleeve W2 is formed so that a high-precision squareness is formed with respect to the joint.

The end of the photosensitive drum W2 may be subjected to inner diameter processing, and the coaxiality between the inner diameter processing hole 630 and the outer diameter of the photosensitive drum W2 may be set with high accuracy. When the inner diameter processing is performed, the thickness of the processed portion becomes more uniform.

It is preferable that the inner diameter of the end portion of the photosensitive drum W2 and the end face 632 or the inner diameter processing hole 630 and the end face 632 which have been subjected to the inner diameter processing are formed so as to form a highly accurate squareness.

The flange W1 and the photosensitive drum W2 are connected without galling, and the outer peripheral contact portion 633 of the flange is brought into contact with the end surface 632 of the photosensitive drum W2. T flange W
It becomes possible to determine the coaxiality of the one convex portion 634 with high accuracy.

Here, when the flanges W1 are misaligned when the flanges W1 are inserted into the photosensitive drum W2, if the misalignment is within the chamfering amount, the misalignment is absorbed by the horizontal compliance 510 and the flange W1 is absorbed. The connecting portion 631 of W1 is smoothly formed on the inner diameter processing hole 6 of the photosensitive drum W2.
Inserted into 30. Further, at the start of the insertion of the flange W1, as shown in FIG.
8 fixes the taper piece 520 in the fitting hole 521 and fixes the parallel hand lock cylinder 518 immediately after the flange W1 is inserted, as shown in FIG. Fixing member 517
And the parallel hand 515 releases the clamping of the flange W1 and separates the flange W1 from between the claws 516. At this time, the flange W1 is pressed downward by the force F of the spring 507 of the cushion unit 503, and the pressing force F becomes a vertical force F1 and a horizontal force F2 with the ball 524A as a fulcrum.

Further, by releasing the parallel hand lock and the parallel clamp in the robot hand 501, the flange W1 is pressed against the end face 632 of the photosensitive drum W2 to regulate the position. In this manner, the processing of the flange W1 and the photosensitive drum W2 is performed. High-precision coupling according to the accuracy is performed.

Also, the robot hand 50 described so far.
In FIG. 1, the protrusion 634 of the flange W1 is clamped and fitted, and the tip of the protrusion 634 is screwed into the screw ball 5.
The press-fitting device has a robot hand 501 'that can hold the flange W1 similarly even when there is no protrusion 634 in the flange W1, but also has a highly accurate fitting. Will be described.

In FIG. 47, the robot hand 501 'has a built-in angle absorbing mechanism.

The robot hand 501 'has a suction head 651 for sucking the flange W1 by vacuum. A ball screw 650 having a rotatable ball 650A is attached to the suction head 651.
51, a plurality of suction head lock cylinders 6
When the taper top 653 is pulled downward by 52, the taper top 653 is fitted and fixed in the fitting hole 517A of the parallel hand fixing member 517.

That is, the suction head lock cylinder 65
2 allows the suction head 651 to move the parallel hand fixing member 5
17 to be fixed.

When the insertion of the flange W1 is started, as shown in FIG.
As shown in (a), the parallel hand lock cylinder 518 fits and fixes the tapered piece 520 in the fitting hole 521, and the suction head lock cylinder 652 fits and fixes the tapered piece 653 in the fitting hole 517A.

After the insertion of the flange W1, FIG.
Immediately as shown in (b), the parallel hand lock cylinder 5
18 is unlocked, and the parallel hand fixing member 517 is operated.
And the suction head 651 allow relative displacement. Accordingly, the flange W1 is provided with the inner diameter processing hole 630 of the photosensitive drum W2.
They will be combined in a manner that follows.

When the flange W1 is connected, the flange W1 is pressed downward by the force F of the spring 507 of the cushion unit 503. As shown in FIG. 48B, the parallel hand fixing member 517 moves the thrust bearing against the lock plate 512. The position deviation is absorbed by Δx via 522, and the angle of the suction head 651 with respect to the parallel hand fixing member 517 is absorbed by Δθ.

[Specific Manufacturing Method of Photosensitive Drum] (First Embodiment) A JIS A3003 aluminum alloy is extruded by a porthole extrusion method to form a cylindrical shape, which is further drawn to obtain an outer diameter of 3 mm.
It was a cylinder having a diameter of 0.0 mm, an inner diameter of 28.0 mm, and a length of 254 mm (hereinafter referred to as a drum cylinder).

[0230] A total of ten drum cylinders, each having an inside diameter of 28.5 mm and a length of 7 mm, were cut inside one end of the drum cylinder.

Next, 50 parts by weight of titanium oxide powder coated with tin oxide containing 10% of antimony oxide, 25 parts by weight of a resole type phenol resin, methylcellosolve 20
Parts by weight, 5 parts by weight of methanol and silicone oil (polymethylsiloxane polyoxyalkylene copolymer,
0.002 parts by weight (average molecular weight: 3000) was dispersed in a sand mill using φ1 mm glass beads for 2 hours to prepare a coating for the conductive layer.

The above coating material was dip-coated on an aluminum cylinder and dried at 140 ° C. for 30 minutes to form a film having a thickness of 20 μm.
m conductive layers were formed.

A solution prepared by dissolving 5 parts by weight of a 6-66-610-12 quaternary polyamide copolymer resin in a mixed solvent of 70 parts by weight of methanol and 25 parts by weight of butanol was applied by dipping and dried to obtain a 1 μm A thick undercoat layer was provided.

Next, oxytitanium phthalocyanine 4
Parts by weight and 2 parts by weight of a polyvinyl butyral resin were added to 100 parts by weight of cyclohexanone, dispersed by a sand mill using 1 mmφ glass beads for 1 hour, diluted with 100 parts by weight of methyl ethyl ketone, and then diluted with an undercoat layer. After being applied thereon, it was dried at 80 ° C. for 10 minutes to form a charge generation layer having a thickness of 0.15 μm.

Next, a solution was prepared by dissolving 10 parts by weight of the charge transporting material having the structure shown in FIG. 49 and 10 parts by weight of bisphenol Z-type polycarbonate resin in 60 parts by weight of monochlorobenzene, and applied to the charge generating layer by dipping. did. This is dried at a temperature of 110 ° C. for one hour and
A charge transport layer having a thickness of m was formed to obtain a photosensitive drum W2.

With respect to five of the ten photosensitive drums, a flange W is attached to one end of the photosensitive drum by a press-fitting device of a type in which a flange shown in FIG.
1 was inserted.

The drum cylinder used for inlay run-out,
End surface perpendicularity and coaxiality between the shaft part of the flange and the fitting part,
The values of the roundness of the fitting portion and the runout of the contact surface of the flange with the drum cylinder are as shown in FIG.

Further, the run-out of the shaft of the flange W1 was measured with reference to the drum cylinder W2 after the connection, and the result was as shown in FIG.

(Second Embodiment) A JIS A6063 aluminum alloy was pressed by a porthole extrusion method.
Outer diameter 40.2mm, inner diameter 38.0mm, length 254mm
This cylinder was mirror-finished with an outer diameter of 40.0 mm to obtain an outer diameter of 40.0 mm, and 10 drums having an inner diameter of 38.5 mm and a length of 10 mm were cut inside one end of the drum cylinder.

A photosensitive layer was provided on this drum cylinder in the same manner as in the first embodiment to form a photosensitive drum.

The flanges were pressed into the photosensitive drums by using a press-fitting device of the type shown in FIG. 47 in which five of the ten flanges W1 of the robot hand were gripped by vacuum suction.

This flange is formed by insert-molding a polyacetal resin and a stainless steel shaft having a diameter of 7 mm and a length of 25 mm. The outer diameter of the fitting portion with the photosensitive drum is 3 mm.
8.53mm, fitting length 7mm, stainless steel shaft length 2
0 mm.

With respect to the five photosensitive drums, the flange W1 has a joint diameter of 28.55 mm and a joint length of 5 mm, based on the outer diameter of the photosensitive drum, and is made of polycarbonate resin. is there.

[0244] The run-in of the drum cylinder used,
End surface perpendicularity and coaxiality between the shaft part of the flange and the fitting part,
The values of the roundness of the fitting portion and the runout of the contact surface of the flange with the drum cylinder are as shown in FIG.

Further, the deflection of the shaft portion of the flange W1 was measured with reference to the drum cylinder W2 after the connection, and the result was as shown in FIG.

(First Comparative Example) Similar results are obtained when a flange is inserted and fitted into the five remaining photosensitive drums of the first embodiment by a press-fitting device having no centering mechanism. 5
It is shown in FIG.

As can be seen from a comparison between FIGS. 50 and 52, although the accuracy of the parts of the used flange W1 and that of the photosensitive drum are almost the same, the one connected by using the apparatus of the present embodiment has the same connection accuracy. Has improved overall.

When the run-out of the shaft of the flange when rotated was measured, a value as shown in FIG. 52 was obtained.

(Second Comparative Example) In the second embodiment, the remaining five photosensitive drums were press-fitted while holding the flange shaft by a press-fitting jig having no centering mechanism. The deflection of the flange shaft of the photosensitive drum fitted with the flange was measured in the same manner, and the result was as shown in FIG.

As can be seen from these results, when the press-fitting device of the flange W1 having the centering mechanism of the present embodiment is used, high-precision flange connection is performed even if the accuracy of the used components is almost the same. be able to.

When the photosensitive drums with flanges manufactured in the first and second embodiments described above were actually installed in a laser beam printer to perform image output, good images were obtained with all photosensitive drums. .

On the other hand, the photosensitive drums manufactured in the first comparative example and the second comparative example were evaluated in the same manner. As a result, uneven development occurred in a part of an image in a case where the flange runout was large.

When the actual production is considered, the photosensitive drum having the unevenness of the image is a defective product. Therefore, it is estimated that the comparative example has a higher defective rate than the embodiment.

As described above, according to the present embodiment, the flange member can be fitted into the end portion of the photosensitive drum while being aligned, and can be coupled with high accuracy. And good images can be obtained.

[0255]

As described above, according to the present invention,
The following effects can be obtained. (1) As the developing sleeve, the run-out of the connected flange can be suppressed small, and a good image can be obtained. (2) The resin flange member can be coupled with high precision after inserting the magnet roller without the need for a high-precision flange or a high-precision pipe with a spigot. Good accuracy. Therefore, when such a high-precision cylindrical member is used for a developing sleeve or the like, a delicate color tone such as halftone can be faithfully reproduced, and a high-definition and high-quality image can be obtained. (3) The cost is reduced because a resin flange is not necessary and a relatively rough precision resin flange is used. The apparatus only needs to have a mechanism for leveling the flange portion, and does not require a very complicated mechanism. (4) Since the flange member can be fitted into the end portion of the photosensitive drum while being aligned and accurately coupled, a good image can be obtained when the flange member is incorporated in the image forming apparatus.

[0256]

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a developing sleeve manufacturing apparatus according to the present invention.

FIG. 2 is a front view of the manufacturing apparatus shown in FIG.

FIG. 3 is a plan view of the manufacturing apparatus shown in FIG.

FIG. 4 is a schematic configuration diagram of the robot hand shown in FIG. 1;

FIG. 5 is a sectional view of the robot hand shown in FIG. 1;

FIG. 6 is a view showing a state in which a flange member is inserted into a sleeve member.

FIG. 7 is a schematic configuration diagram of the horizontal compliance shown in FIG. 4;

FIG. 8 is an enlarged view of the high-frequency heating device shown in FIG.

FIG. 9 is a side view of the turntable shown in FIG. 1;

FIG. 10 is a side view of the turntable shown in FIG. 1;

11 is a block diagram of a control system of the manufacturing apparatus shown in FIG.

FIG. 12 is a side view of a flange and a sleeve connected by the manufacturing apparatus of FIG. 1;

13 is an explanatory diagram of a cross-sectional shape of the sleeve shown in FIG.

14 is a flowchart for explaining the operation of the robot hand of the manufacturing apparatus shown in FIG.

FIG. 15 is a flowchart for explaining the operation of the turntable of the manufacturing apparatus shown in FIG.

FIG. 16 is a sectional view of a sleeve and a flange connected by the manufacturing apparatus of FIG. 1;

FIG. 17 is a view for explaining a relationship between a heating time and a temperature of the sleeve by the manufacturing apparatus of FIG. 1;

FIG. 18 is a view for explaining the relationship between the temperature of a sleeve heated by the manufacturing apparatus of FIG. 1 and the amount of expansion.

FIG. 19 shows a second example of the developing sleeve manufacturing apparatus according to the present invention.
It is sectional drawing of the principal part for demonstrating the heating operation state by embodiment.

FIG. 20 is an explanatory diagram of a measurement position on the developing sleeve.

FIG. 21 is a side view for explaining a blast processing operation on the developing sleeve.

FIG. 22 is a side view for explaining the coating operation for the developing sleeve.

FIG. 23 is a view illustrating the method of manufacturing the developing sleeve.

FIG. 24 is a cross-sectional view of a main part for describing another example of the method of manufacturing the developing sleeve.

FIG. 25 is a diagram showing the results of the fourth to sixth examples and the first to fifth comparative examples.

FIG. 26 is a schematic configuration diagram of a main part of the image forming apparatus.

FIG. 27 is a block diagram of the image forming apparatus shown in FIG. 26;

FIG. 28 is a perspective view of the image sleeve and the photosensitive drum shown in FIG. 26;

FIG. 29 is a sectional view of an end of the image sleeve shown in FIG. 26;

30 is a side view of a driving mechanism of the image sleeve shown in FIG. 26.

31 is a sectional view of a main part of a driving mechanism of the image sleeve shown in FIG. 26;

FIG. 32 is a side view for explaining the positional relationship between the image sleeve and the photosensitive drum shown in FIG.

FIG. 33 is a side view for explaining an example of a conventional image sleeve.

FIG. 34 is a side view and a plan view of a flange made of a thermoplastic resin and an aluminum alloy.

FIG. 35 is a side view and a plan view of a flange made of a thermoplastic resin and a non-thermoplastic resin.

FIG. 36 shows a structure of a styryl compound.

FIG. 37 is a diagram showing results of the first to third examples and first to third comparative examples.

FIG. 38 is a front view of the manufacturing apparatus according to the third embodiment.

FIG. 39 is a side view of the manufacturing apparatus according to the third embodiment.

FIG. 40 is a plan view of the manufacturing apparatus according to the third embodiment.

FIG. 41 is a schematic configuration diagram of a robot hand of the manufacturing apparatus according to the third embodiment.

FIG. 42 is a sectional view of the robot hand.

FIG. 43 is an enlarged sectional view of a distal end portion of the robot hand shown in FIG. 42.

FIG. 44 is a schematic configuration diagram of the horizontal compliance shown in FIG. 41.

FIG. 45 is a view for explaining an operation of coupling the flange and the photosensitive drum by the manufacturing apparatus according to the third embodiment.

FIG. 46 is a diagram illustrating a relationship between a flange and a photosensitive drum connected by the manufacturing apparatus according to the third embodiment.

FIG. 47 is a sectional view of another example of the robot hand of the manufacturing apparatus according to the third embodiment.

FIG. 48 is a view for explaining a coupling operation between the flange and the photosensitive drum when the robot hand of FIG. 47 is used.

FIG. 49 is a diagram showing a chemical structure of a charge transporting material.

FIG. 50 is a diagram showing a result of the first example.

FIG. 51 is a diagram showing a result of the second example.

FIG. 52 is a diagram showing a result of the first comparative example.

FIG. 53 is a diagram showing a result of the second comparative example.

[Explanation of symbols]

 W1 Flange member W2 Cylindrical member W3 Magnet roller 1A Robot hand 4 High frequency heating device 9 Cushion unit 10 Compliance (alignment means) F1 Thermoplastic resin portion F2 Aluminum alloy portion F3 Non-thermoplastic resin portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yusuke Yamada 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc.

Claims (26)

[Claims] 1. A method for manufacturing a cylindrical body in which a connecting portion of a shaft-shaped member is inserted and connected to the inside of an end of a cylindrical member, wherein the inside of the end of the cylindrical member and the connecting portion of the shaft-shaped member are tightened. A processing step of processing to a dimension having a relationship of fit, and heating an end of the cylindrical member, and expanding an inner diameter of the cylindrical member to a dimension having a clearance fit with a coupling portion of the shaft-shaped member. A heating step of causing the shaft-shaped member to be held by a holding jig in which a perpendicularity between a gripping portion of the shaft-shaped member and an end surface orthogonal to an axis of the shaft-shaped member is set with high accuracy, Inserting the shaft-shaped member held by the holding jig inside the end of the cylindrical member while the cylindrical member is being cooled, and inserting the end surface of the holding jig into contact with the end surface of the cylindrical member It is characterized by having Method for producing a cylindrical body to be. 2. The holding jig moves the shaft-like member in a direction substantially orthogonal to the axis of the shaft-like member so that the shaft-like member is inserted following the inner peripheral surface of the cylindrical member. The method for manufacturing a cylindrical body according to claim 1, wherein the cylindrical body is held as possible. 3. The cylindrical body according to claim 1, wherein the holding jig is processed so that a perpendicularity between a holding portion of the shaft-shaped member and the end face is 5 μm or less. Production method. 4. The method for manufacturing a cylindrical body according to claim 1, wherein at least a joint between the cylindrical member and the shaft-shaped member has a main component made of the same material. 5. The method for manufacturing a cylindrical body according to claim 4, wherein at least a joint between the cylindrical member and the shaft-shaped member is formed of a material whose main component is aluminum. 6. The method for manufacturing a cylindrical body according to claim 1, wherein the cylindrical body includes a magnet roller therein. 7. The cylindrical member has a thickness of 0.5 mm to 2.0 mm.
0 mm, the interference between the inside of the end of the cylindrical member and the joint of the shaft-shaped member was 0.04 to 0.2% of the reference inner diameter of the cylindrical member, and the cylindrical member was rotated. When the deflection inside the end of the cylindrical member is 10 μm or less, the coupling length between the inside of the end of the cylindrical member and the coupling portion of the shaft-shaped member is 2 mm to 6 mm, and the end of the cylindrical member is The method for manufacturing a cylindrical body according to claim 1, wherein the inner side is expanded by 0.3 to 0.5% of the reference inner diameter in the heating step. 8. A cylindrical body manufactured by the manufacturing method according to claim 1. 9. A developing sleeve manufactured by the manufacturing method according to claim 1. Description: 10. A photosensitive drum on which an electrostatic latent image is formed,
A developing device comprising: a developing sleeve for supplying a developer to the photosensitive drum to cause the electrostatic latent image to develop, wherein the developing sleeve is the developing sleeve according to claim 9. . 11. A method of manufacturing an electrophotographic photoreceptor, wherein said shaft portion of a flange member having a shaft portion and a flange portion is inserted and coupled inside an end portion of the cylindrical member, wherein: And a processing step of processing the shaft member and the shaft portion of the flange member into a dimension that provides an interference fit, and holding by a holding jig for holding the flange member movably in a direction substantially orthogonal to the axis thereof. And pressing the shaft of the flange member held by the holding jig into the inside of the end of the cylindrical member by the holding jig, and abutting the flange of the flange member on the end surface of the cylindrical member. And a press-fitting step. 12. At least a connecting portion of the cylindrical member,
The method of manufacturing an electrophotographic photosensitive member according to claim 11, wherein the method is formed from a material containing aluminum as a main component. 13. The method according to claim 12, wherein the material containing aluminum as a main component is JIS 3000 or 6000 series. The flange member may be a thermoplastic resin,
The method of manufacturing an electrophotographic photosensitive member according to claim 11, wherein the method is formed of a synthetic resin such as a thermosetting resin. 15. The method according to claim 14, wherein the flange member is formed of one of a polycarbonate resin and a polyacetal resin. 16. An electrophotographic photosensitive member manufactured by the manufacturing method according to claim 11. Description: 17. A method for manufacturing a cylindrical body in which the shaft portion of a flange member having a shaft portion and a flange portion is inserted and connected to the inside of the end portion of the cylindrical member. A processing step of processing a shaft portion made of a thermoplastic resin of the flange member into a dimension having an interference fit relationship; A heating step of expanding the inner diameter of the cylindrical member to a dimension such that, while aligning the shaft portion of the flange member with respect to the axis outside the cylindrical member, the shaft portion is thermally melted; A method for manufacturing a cylindrical body, comprising: an inserting step of inserting the cylindrical member into the inside of an end portion thereof; and a fixing step of cooling the cylindrical member and fixing the flange member. 18. The method according to claim 17, wherein at least a joint of the cylindrical member is formed of metal. 19. The method according to claim 18, wherein at least a joint of the cylindrical member is formed of a material containing aluminum as a main component. 20. The method according to claim 17, wherein the cylindrical member has a magnet roller therein. 21. The method according to claim 17, wherein the flange member is formed of a thermoplastic resin and a metal.
3. The method for producing a cylindrical body according to item 1. 22. The method according to claim 17, wherein the flange member is formed of a thermoplastic resin and a non-thermoplastic resin. 23. The cylindrical member has a thickness of 0.5 mm or more.
2.0 mm, the interference between the inside of the end of the cylindrical member and the shaft of the flange member is 0.04 to 0.2% of the reference inner diameter of the cylindrical member, and the cylindrical member is rotated. 0.3 mm of run-out inside the end of the cylindrical member when
The coupling length between the inside of the end of the cylindrical member and the shaft of the flange member is 2 mm to 6 mm, and the inside of the end of the cylindrical member is 0.3 to The method for manufacturing a cylindrical body according to claim 17, wherein the diameter is expanded by 0.5%. 24. A cylindrical body manufactured by the manufacturing method according to claim 17. Description: 25. A developing sleeve manufactured by the manufacturing method according to claim 17. Description: 26. A photosensitive drum on which an electrostatic latent image is formed,
26. A developing device comprising: a developing sleeve for supplying a developer to the photosensitive drum to cause the electrostatic latent image to develop, wherein the developing sleeve is the developing sleeve according to claim 25. .