JPH10156634A - Method and device for manufacturing cylindrical body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacture of a cylindrical body, by which high- accurate coaxiality and oscillation precision can be obtained when the cylindrical member and a flange member are connected to each other. SOLUTION: Connecting parts of the end inner part of a cylindrical member W2 and a flange member W1 are machined into such a size as to have the relationship of interference fit. The end of the cylindrical member W2 is heated at the specified temperature to extend its diameter, connecting parts of the end inner part of the cylindrical member W2 and the flange member W1 are made into the relationship of clearance fit, and the connecting part of the flange member is inserted into the end of the cylindrical member W2. While the cylindrical member W2 is cooled, the flange member W1 is pressed in the fitting direction to the cylindrical member W2 and connected to it. The outside shape expansion position of the cylindrical member W2 in the connecting parts of the cylindrical member W2 and the flange member W1 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a cylindrical body such as an electrophotographic photosensitive drum and a developing sleeve in an image forming apparatus such as a copying machine, a printer, a facsimile, and a printing machine.

[0002]

2. Description of the Related Art Conventionally, as an electrophotographic photosensitive drum or a developing sleeve in an image forming apparatus such as an electrophotographic copying machine, a laser beam printer, a facsimile, and a printing machine, a cylinder having a surface finished to a predetermined roughness. A member is used.

An electrophotographic photosensitive drum is manufactured by applying a photosensitive film to the surface of a substrate finished to a predetermined surface roughness. However, if the surface accuracy or dimensional accuracy of the drum substrate is low, the photosensitive film has irregularities. This causes a defect in the image of the image forming apparatus. Therefore, in order to obtain a highly accurate image forming apparatus, the surface accuracy of the drum base is required to be processed to a predetermined roughness, and extremely high accuracy is required also for roundness and straightness. You.

Further, in order to carry a latent image on a latent image carrier formed by an electrophotographic method or an electrostatic recording method, a developer is carried on a latent image carrier having a latent image formed thereon and transported. Developing sleeves carry one-component, two-component developers, magnetic and non-magnetic developers, and even insulative and dielectric developers, to carry these phenomena and faithfully visualize latent images. In addition, extremely high straightness and runout accuracy are required.

For example, in the case of a developing sleeve, the straightness is 15
It is preferable that the thickness be not more than μm. This is a value necessary to keep the gap between the photosensitive drum and the photosensitive drum uniform in the axial direction and obtain a good image, and obtain a desired accuracy by extruding, extracting, cutting or polishing the cylindrical body.

In the case of a photosensitive drum, the straightness is set to 20 μm.
It is preferable to set the following. This is necessary in order to form a uniform latent image in the axial direction by the exposure means in forming a latent image on the photosensitive drum, and a desired accuracy is obtained by extruding, extracting, cutting, or polishing the cylindrical body.

Generally, such a cylindrical member has a purity of 99.5.
% Of Al or 0.05 to 0.20% of Cu and 1.0%
Cu-Mu-Al alloy containing up to 1.5% Mu, or Si-Mg-Al alloy containing 0.2 to 0.6% Si and 0.45 to 0.9 Mg is used, These materials are extruded and subjected to a drawing process to a certain degree of dimensional accuracy. However, if such an aluminum drawn cylinder remains as it is, a large bend remains. Therefore, usually, after this, roll correction or the like is performed to finish to the 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.

For example, in the case of a developing sleeve, in order to impart the function of the developing sleeve to the base cylinder thus formed, sand blasting is performed on the surface of the cylinder to form irregularities on the surface, thereby improving the transportability of the developer. Or, after that, for the purpose of improving the charge-imparting property of the toner, a coating material in which conductive carbon is dispersed in a thermosetting resin is spray-applied to the surface on which the unevenness is formed, and the coating is performed at 150 to 170 ° C. in a thermostat.
It is known to cure the coating by drying at a moderate temperature for 20 to 30 minutes.

Finally, flange members for rotatably supporting the developing sleeve are bonded to both ends of the cylindrical member thus formed by bonding, press-fitting, or other methods. Further, depending on the type of developer used, a magnet roller for transporting the toner by magnetic force may be inserted into the cylinder. This is the case when the toner is a magnetic toner. Thus, the developing sleeve is completed by connecting the flange members to both ends of the cylindrical member.

[0010]

However, in the above method, since the flange member is joined after sandblasting or coating the base cylinder, the coaxiality between the flange member and the cylindrical member deteriorates. There are drawbacks. 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, and is particularly unsuitable as a high-precision cylindrical member used in an electrophotographic apparatus or the like. there were. Poor coupling accuracy of the flange member means that the flange member is bent and coupled to the cylindrical member, the rotation behavior of the developing sleeve becomes irregular, and the density on the image is synchronized with the rotation cycle of the sleeve. Irregularities occur.

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

That is, a flange member is previously joined to one side of a cylindrical member serving as a base of the developing sleeve by press-fitting, bonding, or another method. Then, before passing through the plasting and coating processes, the magnet roller is inserted first, and the other flange member on one side of the cylindrical member is similarly connected. After that, the outer surfaces of the flange member and the cylindrical member are simultaneously cut by a lathe or the like to finish the coaxiality with high precision. And
Finally, plasting and coating are 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 in which a magnet roller is incorporated is subjected to a high temperature of 150 to 170 ° C., and the magnet roller inserted into the cylindrical member by the heat applied at that time. Is deformed, bends greatly inside the cylindrical member, and comes into contact with the inner surface of the cylindrical member. Further, when the magnet roller is deformed, the magnetic force curve is deviated, or when the magnet roller comes into contact with the inner surface of the cylindrical member, the rotation behavior of the developing sleeve is affected, which adversely affects an image to be formed. Also, in a cutting process using a lathe or the like, vibration is likely to occur when the work is rotated at a high speed. Therefore, the rotation speed of the work must be limited to 3000 rpm or less.
It is difficult to speed up the cutting process.In addition, the rotation of the motor must be stopped when each work is attached to and detached from the cutting machine, which increases the work cycle time of the work itself and increases manufacturing costs. Invite.

Here, the method of connecting the cylindrical member and the flange member of the developing sleeve is as follows. (A) A plastic flange member is press-fitted into an end of an aluminum cylindrical member, and then the cylindrical member is pressed. How to swage the end,
(B) A method of press-fitting an aluminum flange member into an end of an aluminum cylindrical member, and (C) a method of shrink-fitting an aluminum flange member at an end of an aluminum cylindrical member. However, each method has the following problems. Problems of the method (A) In order to press-fit a plastic flange member at the end of an aluminum cylindrical member to obtain a high-precision connection, a device for press-fitting the flange member requires a very high precision. An adjusted press-fitting device is required, the adjustment is difficult, and the device itself is expensive. In addition, even if a high-precision press-fitting device is used, the deflection of the flange with respect to the outer shape standard of the cylindrical member is made smaller than 60 μm. It is difficult. 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 and the flange member are not aligned, and an unnecessary force acts on the cylindrical member. The gap between the photosensitive drum 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 rollers are fixed. When the photosensitive drum is pressed against the photosensitive drum by the preload, the following problem occurs due to the fluctuation of the rotation. In other words, the 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. This is a factor that hinders the high-speed rotation of the developing sleeve, thereby hindering a high-speed recording operation.

The roundness of the cylindrical member at the joint with the press-fitted flange member is poor in the roundness of the joint of the plastic flange member, and a crimping step is required to increase the joint strength. 20 at best for
It is about μm (FIG. 76 (b)). Therefore, in order to make the gap between the developing sleep and the photosensitive drum constant, sleeve rollers are attached to both ends of the cylindrical member of the developing sleeve, and the sleeve rollers are pressed against the photosensitive drum by a predetermined preload. However, the gap varies due to the roundness of the developing sleeve due to the rotation, and the image becomes uneven. Problems of the method (B) Since the aluminum flange member is press-fitted into the aluminum cylindrical member, caulking at the joint portion of the cylindrical member in (A) becomes unnecessary, but the galling between the cylindrical member and the flange member becomes unnecessary. The press-fitting becomes non-uniform, and the run-out of the flange portion worsens. At the same time, the roundness of the outer shape of the connecting portion of the cylindrical member deteriorates.

In order to keep the gap between the developing sleeve and the photosensitive drum joined by such a method constant,
As shown in FIG. 77, when a hard resin sleeve roller 2023 is fitted into the flange member 2022, the following problem occurs. That is, if there is a deviation between the axis of the cylindrical member of the developing sleeve 1020 and the axis of the flange member 2023,
As shown in FIG. 78, the cylindrical member of the developing sleeve 1020 rotates eccentrically around the magnet roller 1025 which is fixed and supported, and the toner between the developing sleeve 1020 and the photosensitive drum 1101 (see FIG. 77). In the exchange, the magnetic attraction of the toner by the magnet roller 1025 changes as shown in FIG. 79, which causes image quality unevenness. Problems of the method (C) When the aluminum flange member is shrunk and joined to the aluminum cylinder member, caulking at the joining portion of the cylinder member becomes unnecessary, and non-uniformity due to galling between the cylinder member and the flange member. And the flange member is less slid. Therefore, the roundness of the outer shape of the cylindrical member of the connecting portion is 5 μm or less, which is considered to be good (FIG. 76 (c)). However, there are the following problems.

In order to keep the gap between the developing sleeve and the photosensitive drum constant according to the product form, sleeve rollers are attached to both ends of the cylindrical member of the developing sleeve, and the sleeve rollers are applied to the photosensitive drum by a predetermined preload. In the case of pressing, as shown in FIGS. 76 and 80, if the outer shape of the connecting portion of the cylindrical member expands due to shrinkage and becomes uneven at the position of the sleeve roller, the outer shape roundness is good in the initial state of the device and the gap is increased. Even if it is kept constant, there is a problem that the sleeve roller is unevenly cut due to the one-sided contact, resulting in poor durability.

In the case of a developing system (in which a magnetic blade is used) requiring a high-magnetism magnet roller in order to increase the durability of the developing blade in terms of product functions, the outer diameter of the sleeve W2 is reduced due to the component structure. There is a method in which the outer diameter of the magnet roller is set to be constant and the outer diameter is increased. This makes it possible to increase the magnetic force around the outer diameter of the sleeve W2. However, this makes the gap between the sleeve W2 and the magnet roller W3 extremely small. In other words, the thickness of the sleeve must be reduced.

In addition, as the speed and definition of the product have been increased, a method of increasing the interference with the flange member to be joined has been adopted in order to improve the rotational torque of the sleeve.

Therefore, there are the following problems in product production. When the end portion of the sleeve is heated, the diameter is increased, a gap is formed, and a heating end signal is received from the high-frequency heating device 4 by the robot 1. Since the sleeve itself is thin, heat radiation is also quick (FIG. 81) and the sleeve shrinks immediately, shortening the time for clearance clearance (sometimes, press-fitting), and the insertion is not completed (flange However, a problem occurs in which the device is attached to the sleeve while being tilted (see FIG. 75).

Further, if a method of increasing the heating temperature is adopted to increase the diameter expansion amount and prevent insertion errors, there is a problem that thermal deformation occurs due to the thin sleeve. For this reason, the heating temperature must be lowered, and a sufficient gap cannot be obtained at the time of insertion, and the insertion may not be completed (FIGS. 75 and 81).

Further, when the method of joining by shrink fitting is used, the flange is provided with an opposing surface which is in contact with the end face of the cylindrical member, and when shrink fitting is performed, the outer shape of the flange is aligned in the cylindrical member. Meanwhile, the opposite surface of the flange member abuts on the end surface of the cylindrical member, thereby finishing the coaxiality between the flange member and the cylindrical member with high accuracy.

However, this method has a problem that the processing cost is increased in order to produce a highly accurate developing sleeve. In other words, to obtain a highly accurate developing sleeve,
In FIG. 19A, a perpendicularity and a coaxiality are required for the portion A of the flange member.
In (b), with respect to the portions A and B of the cylindrical member,
Squareness and coaxiality were required respectively.

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 cylindrical member capable of obtaining high-precision coaxiality and runout accuracy when a cylindrical member and a flange member are connected. To provide a manufacturing method and a manufacturing apparatus.

Another object of the present invention is to provide a highly accurate cylindrical body even if the processing accuracy of a single piece of the cylindrical member and the flange member is reduced, and to reduce the cost. To provide a manufacturing method and a manufacturing apparatus.

Still another object of the present invention is to provide a method and an apparatus for manufacturing a cylindrical body capable of eliminating a mistake in inserting the flange member into the cylindrical member and obtaining a highly accurate cylindrical body. .

[0028]

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 for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end of a cylindrical member,
A processing step of processing the inside of the end portion of the cylindrical member and the joint portion of the flange member to a size that becomes a tight fit.
The end of the cylindrical member is heated to a predetermined temperature to expand the diameter,
A heating step of setting the inside of the end portion of the cylindrical member and the connection portion of the flange member to have a clearance fit, and an insertion step of inserting the connection portion of the flange member inside the end portion of the cylindrical member; A coupling step of pressing the flange member in a direction in which the flange member is fitted into the cylindrical member during the cooling of the cylindrical member, and coupling the cylindrical member to a coupling portion between the cylindrical member and the flange member in the coupling step. Is characterized by controlling the position of the outer bulge.

Further, in the method of manufacturing a cylindrical body according to the present invention, the position of the outer bulge of the cylindrical member is controlled by shifting the position of the connecting portion of the flange member.

Further, in the method of manufacturing a cylindrical body according to the present invention, the heating of the cylindrical member is performed by high-frequency induction heating.

In the method for manufacturing a cylindrical body according to the present invention, the cylindrical member is a phenomenon sleeve used in an image forming apparatus.

In the method for manufacturing a cylindrical body according to the present invention, the cylindrical member is a photosensitive drum used in an image forming apparatus.

Further, according to the present invention, there is provided a method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end of the cylindrical member. A processing step of forming a joint portion between the inside of the flange member and the flange member into a size that forms a tight fit relationship, and heating the end of the cylindrical member to a first predetermined temperature to expand the diameter; A heating step in which the inner side of the flange member and the connecting portion of the flange member have a clearance relationship, an inserting step of inserting the connecting portion of the flange member inside the end portion of the cylindrical member, and cooling of the cylindrical member. And a holding release step of releasing the holding means for holding the flange member when the cylindrical member has reached the second predetermined temperature.

Further, according to the present invention, there is provided a method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end of the cylindrical member. A processing step of forming a joint portion between the inside of the flange member and the flange member into a size that forms a tight fit relationship, and heating the end of the cylindrical member to a first predetermined temperature to expand the diameter; A heating step in which the inner side of the flange member and the connecting portion of the flange member have a clearance relationship, an inserting step of inserting the connecting portion of the flange member inside the end portion of the cylindrical member, and cooling of the cylindrical member. A grip releasing step of releasing the gripping means for gripping the flange member when the cylindrical member has reached the second predetermined temperature.

In the method for manufacturing a cylindrical body according to the present invention, the second predetermined temperature is not higher than a temperature at which the cylindrical member and the flange member turn from a clearance fit into a tight fit. It is characterized by:

The 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 flange member is fitted inside an end of the cylindrical member. A processing step of processing the inner side of the end portion and the connecting portion of the flange member into a size that becomes a tight fit
The end of the cylindrical member is heated to a predetermined temperature to expand the diameter,
A heating step in which the inside of the end of the cylindrical member and the joint of the flange member are in a clearance relationship with each other, and the inside of the end of the cylindrical member is inserted with the joint of the flange member. Inserting the holding means for holding against the end of the cylindrical member, during the cooling of the cylindrical member,
A holding release step of releasing the holding of the holding means when the temperature of the cylindrical member reaches a predetermined temperature.

The 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 flange member is fitted inside the end of the cylindrical member. A processing step of processing the inner side of the end portion and the connecting portion of the flange member into a size that becomes a tight fit
The end of the cylindrical member is heated to a predetermined temperature to expand the diameter,
A heating step in which the inside of the end of the cylindrical member and the joint of the flange member are in a clearance relationship with each other, and the inside of the end of the cylindrical member is inserted with the joint of the flange member. An insertion step of bringing a suction unit for suction into contact with an end of the cylindrical member, and during cooling of the cylindrical member,
A suction releasing step of releasing the suction of the suction means when the temperature of the cylindrical member reaches a predetermined temperature.

Further, according to the present invention, there is provided a cylindrical body manufacturing apparatus for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end of the cylindrical member. The end of the cylindrical member, which is processed to a size where the inner side of the end and the connecting portion of the flange member have a tight fit, is heated to a first predetermined temperature, and the inner side of the end of the cylindrical member is heated. Heating means for expanding the diameter of the connecting portion of the flange member so as to have a clearance relationship with the connecting portion of the flange member; inserting means for inserting the connecting portion of the flange member inside the end of the cylindrical member; Gripping means for gripping a member, wherein when the cylindrical member is cooled to a second predetermined temperature during cooling of the cylindrical member, gripping means for releasing the gripping of the flange member; and The first and second places It is characterized by comprising temperature detecting means for detecting that became temperature.

Further, in the cylindrical body manufacturing apparatus according to the present invention, the heating means is a high-frequency induction heating apparatus.

Further, in the cylindrical body manufacturing apparatus according to the present invention, the temperature measuring means is a heat radiation thermometer.

In the apparatus for manufacturing a cylindrical body according to the present invention, the cylindrical member is a developing sleeve used in an image forming apparatus.

In the apparatus for manufacturing a cylindrical body according to the present invention, the cylindrical member is a photosensitive drum used in an image forming apparatus.

Further, according to the present invention, there is provided a method for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end of the cylindrical member. A processing step of processing the inside of the part and the joining part of the flange member into a size having a tight fit relationship, and heating the end of the cylindrical member to a predetermined temperature to expand the diameter; And a heating step of setting the connection portion of the flange member to a clearance fit, an insertion step of inserting the connection portion of the flange member inside the end portion of the cylindrical member, and during cooling of the cylindrical member, A coupling step of pressing the flange member in the direction of insertion into the cylindrical member and coupling the same, and simultaneously with the end of heating in the heating step,
The insertion of the flange member into the cylindrical member is terminated.

Further, in the method of manufacturing a cylindrical body according to the present invention, the cylindrical member is a developing sleeve used in an image forming apparatus.

In the cylindrical body manufacturing apparatus according to the present invention, the cylindrical member is a photosensitive drum used in an image forming apparatus.

[0046]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to "the overall structure of an image forming apparatus", "apparatus for manufacturing a developing sleeve",
This will be described separately for "Specific example of manufacturing method of developing sleeve".

(First Embodiment) [Image Forming Apparatus] FIG. 1 shows a schematic configuration of a transfer type electrophotographic apparatus provided with a developing sleeve (or developing roller) as a cylindrical member and a photosensitive drum.

In FIG. 1, reference numeral 1101 denotes a photosensitive drum which is driven to rotate around an axis 1101a in the direction of an arrow at a predetermined peripheral speed. 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). 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 development is performed by the transfer unit 110.
By 5, the transfer material P is sequentially transferred from the paper supply unit (not shown) to the surface of the transfer material P fed between the photosensitive drum 1101 and the transfer unit 1105 in synchronization with the rotation of the photosensitive drum 1101. Reference numeral 1020 denotes a developing sleeve provided in the developing unit 1104. The transfer material P having received the image transfer is
Then, the image is separated from the surface of No. 01, is introduced into the image fixing means 1108, receives the image fixing, and is printed out as an object (copy) outside the machine.

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
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 drive, or liquid crystal shutter array drive.

When used as a facsimile printer, the light image exposure L is an exposure for printing received data. FIG. 2 is a block diagram showing a configuration example in this case.

In FIG. 2, the controller 1111
The image reading unit 1110 and the printer 1119 are controlled. 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 1116
Stores predetermined image data. A printer controller 1118 controls the printer 1119. 111
4 is a telephone.

The image received from the 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. When an image for at least one page is stored in the memory 1116, the image of the page is recorded. The CPU 1117 reads one page of image information 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 the image information of the page.
Note that the CPU 1117 transmits the next page during recording by the printer 1119.

As described above, image reception and recording are performed.

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. In order to supply the developer satisfactorily, the developing sleeve 1020 needs to be opposed to the photosensitive drum 1101 at a predetermined interval.

FIG. 3 is a perspective view showing the positional relationship between the developing sleeve 1020 and the photosensitive drum 1101, and FIG. 4 is a sectional view of the non-driving side end of the developing sleeve 1020.

As shown in FIG. 3, the developing sleeve 1020
The flange members 1022 at both ends of the slide bearing 10
It is rotatably supported by 23. 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 having good slidability, and has an outer diameter of the developing sleeve 102.
It is set to be larger than the outer diameter of 0 by twice the separation interval δ (2δ). Therefore, as shown in FIG. 4, the distance δ between the surface of the photosensitive drum 1101 and the surface of the developing sleeve 1020 is kept constant by bringing the spacer roller 1021 into contact with the peripheral surface of the photosensitive drum 1101.

FIG. 5 is a side view of the developing means 1104, and FIG. 6 is a sectional view of an end of the developing sleeve 1020 on the drive shaft side.

5 and 6, 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. By meshing, the developing sleeve 1020 is driven to rotate.

FIG. 7 is a sectional view showing a 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] (First Example) FIG. 8 is a side view of a developing sleeve manufacturing apparatus as a cylindrical body, FIG. 9 is a front view of the manufacturing apparatus, and FIG.
FIG. 2 is a plan view of the manufacturing apparatus. In the following, the cylindrical member forming the main body of the developing sleeve will be referred to as a sleeve W.
2. 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, and a sleeve W2 from a conveyor line (not shown)
Is a turntable for loading and unloading.

FIG. 11 shows a schematic configuration of the robot hand 2. The robot hand 2 includes a horizontal compliance unit (alignment unit) Y1 and a horizontal / angle adjustment unit Y
2 and a flange holding unit Y3, and is attached to the arm 1A of the robot 1 via the cushion unit 9.

FIG. 12 is an overall sectional view of the robot hand 2, and FIG. 13 is an enlarged sectional view of a lower portion of the robot hand 2.

In FIG. 12, first, the cushion unit 9 is provided with 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 a 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.
The horizontal displacement of the horizontal table 10B is allowed by the parallel plate-shaped spring 10A as shown in FIG. 14A, or the horizontal displacement of the horizontal table 10B is allowed by the tension spring 10C as shown in FIG. 14B. It has a configuration. When rigidity in the vertical direction is required, FIG.
It is preferable to use the compliance of (b). Spring 10
A, the centripetal force of the horizontal table 10B by 10C is 0.
1 kg or less is good.

Reference numeral 11 denotes a lock cylinder, and reference numeral 12 denotes a lock plate, between which a horizontal compliance 10 is formed. The lock plate 12 has a 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.

Reference numeral 15 denotes a parallel hand to which a pawl 16 for gripping the flange W1 is attached. Reference numeral 17 denotes a parallel hand fixing member that fixes the parallel hand 15 and has a plurality of parallel hand lock cylinders 18 attached thereto. A tapered piece 20 is attached to the upper end of the parallel hand lock cylinder 18. When pressurized air is supplied through a solenoid valve (not shown), the parallel hand lock cylinder 18
Is pulled downward, and the tapered piece 20 is locked with the lock plate 1.
The parallel hand 15 is pulled into and fixed to the lock plate 12 by being fitted into the second fitting hole 21. Further, a thrust bearing 22 is sandwiched between the lock plate 12 and the parallel hand fixing member 17, and the inclination of the parallel hand 15 is corrected by the retracting operation of the parallel hand lock cylinder 18.

Also, the parallel hand fixing member 17 has the structure shown in FIG.
As shown in FIG. 3, a pressing support member 23 for inserting and pressing the flange W1 into the sleeve W2 is attached. The support member 23 has a rotatable ball 24A.
Is mounted.
The mounting position of the screw ball 24 is parallel hand 1
5 and the parallel hand 15 is connected to the flange W1.
Is gripped so as to coincide with the axis of the hollow hole 25 of the flange W1.

8 to 10, the stocker 3 is a device for supplying the robot 1 with the flange W1.
The pallets 120 shown in FIG. 10 are stored in multiple stages, and a large number of flanges W1 are stored in the pallets 120 in a matrix. Flange W1 is robot 1
The pallet 120 that has been emptied by being supplied to the pallet 120 is automatically discharged, and a new pallet 120 with the flanges W1 spread thereon is set at the supply position instead.

FIG. 15 is a detailed view of the high-frequency heating device 4. In the high-frequency heating device 4, when the sleeve W2 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. 15C), and the induced current I2 is applied to the sleeve W2.
Occurs, and the sleeve W2 self-heats. The current I
By changing the frequency of 1, the heating state from the surface of the sleeve W2 located in the coil 113 to the center can be changed, and there is versatility when the thickness of the sleeve W2 changes. In addition, in such induction heating, the portion to which the magnetic field is applied generates heat by itself, so that only the intended portion to be heated is locally and instantaneously compared to the case where heat is applied by heat conduction from the outside. Can be heated. Therefore, heating efficiency is high. Further, since the heated portion can be uniformly heated, the portion is thermally expanded uniformly, and the joining accuracy of shrink fit can be improved.

FIGS. 16 and 17 show the turntable 5.
FIG.

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.

The sleeve W is placed on the turntable 109.
1 for positioning the V-shaped section 2 (FIG. 1)
0), and a rotary cylinder 112 for pressing and fixing the sleeve W2 is installed in the receiver 111, and the positioning and holding of the sleeve W2 and the insertion and removal of the sleeve W2 can be performed according to the operation of the rotary cylinder 112. .

In FIG. 17, 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 vertical 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. 17, reference numeral 114 denotes a magnetic plate made of iron or the like. When the flange W1 is connected 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. 17) attached to the abutment 09 abuts against the rotational positioning shock absorber 116 (see FIG. 17) fixed to the high rotor block 107, the position of the turntable base 109 in the rotational direction is regulated. You.

FIG. 18 is a block diagram of a control system of the present manufacturing apparatus.

In FIG. 18, 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. 19A is a side view of the flange W1, and FIG. 19B 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, which are connected to the processing hole 130 at the end of the sleeve W2, are processed so as to have high precision roundness of 2 μm and coaxiality of 3 μm. Is given. Further, the outer peripheral portion 133 that contacts the end face 132 of the sleeve W2 is processed so that a high-precision squareness is formed with respect to the coupling portion 131. The inner end of the end of the sleeve W2 is processed,
The coaxiality of the inner diameter processing hole 130 and the outer diameter of the sleeve W2 is set with high precision, the unevenness of uneven thickness as shown in FIG. 20B is small, and the thickness is reduced as shown in FIG. It is uniform. Note that a preferable range of uneven thickness 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 flange W1 and the sleeve W2 are joined without being gnaged, and the outer peripheral portion 133 of the flange W1 and the sleeve W2 are joined together.
The end face 132 of the sleeve W
The coaxiality of the convex portion 134 of the flange W1 can be determined with high accuracy with respect to both end portions of the flange 2.

Next, the connection operation between the flange W1 and the sleeve W2 will be described.

FIG. 21 is a flowchart for explaining the operation on the robot 1 side, and FIG. 22 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 claws 16 of the robot hand 2 clamp the flange W1 (step SA1). After that, robot hand 2
Moves above the coil 113 of the high-frequency heating device 4 (step SA2), and the lock plate 1
Release the lock of No. 2 and wait (step SA3).

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. 23 (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. Thereby, as described above, the opening of the sleeve W2, that is, the inner diameter processing hole 13 on the upper end side
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. 24 shows that the upper end of the sleeve W2 is at time t.
1 shows a temperature change when heating is performed, and FIG. 25 shows a relationship between the temperature of the sleeve W2 and the expansion amount.

When the inner diameter processing hole 130 of the sleeve W2 is expanded, the connection portion 1 between the inner diameter processing hole 130 and the flange W1 is increased.
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, the coil 11
3 is stopped, and the high-frequency heating device 4
Is sent, and the robot hand 2 descends (step SA4). As a result, the flange W1 clamped to the claw 16 becomes
After the outer peripheral portion of the flange W1 comes into contact with the end surface 132 of the sleeve W2, the flange W1 is pressed by the force of the spring 6 in the cushion unit 9.

By the way, if the axes of the flanges W1 are misaligned when the flanges W1 are inserted into the sleeve W2, if the misalignment is within the amount corresponding to the chamfer, they are absorbed by the horizontal compliance 10 and the flange W1 is removed. The connecting portion 131 is smoothly formed on the inner diameter machining hole 13 of the sleeve W2.
Inserted in 0. When the insertion of the flange W1 is started, as shown in FIG.
8, the taper piece 20 is fitted and fixed in the fitting hole 21. After the flange W1 is inserted, as shown in FIG.
Immediately, the parallel hand lock cylinder 18 performs an unlocking operation (step SA5), allowing relative displacement between the lock plate 12 and the parallel hand fixing member 17, and releasing the clamp of the flange W1 by the parallel hand 15 (step SA5). Step S
A6), release the flange W1 from between the claws 16. At this time, the flange W1 is pressed downward by the force F of the spring 6 of the cushion unit 9, and the pressing force F is applied to the ball 2
The vertical force F1 and the horizontal force F2 are set with 4A as a fulcrum.

Further, by releasing the parallel hand lock (step SA5) and the parallel clamp release (step SA6) in the robot hand 2, the flange W1 is
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.

At this time, if the root part a and the tip part b of the flange W1 have the same thickness as in the conventional example shown in FIG. 34, the sleeve roller is attached later to the combination of the flange W1 and the sleeve W2. In this case, the swelling of the sleeve becomes uneven at a position inside the drum contact surface of the sleeve roller where the coaxiality is most required, and the accuracy of the coaxiality between the sleeve and the drum contact surface of the sleeve roller is reduced.

Therefore, in the present embodiment, as shown in FIG. 28, the bottom portion a of the flange W1 is formed into a bore formed in the inner diameter of the sleeve W2, and is thinner than the b portion processed into an outer diameter so as to form a tight fit. , An escape portion a1 having a length d is formed in advance. Then, the length d of the relief portion a1 is adjusted to a length such that the portion b is located just inside the drum contact surface of the sleeve roller. In this way, the position of the outer bulge of the sleeve W2 in the axial direction is changed from A (the bulge of the sleeve W2 is located at the end of the sleeve W2) to B (the bulge of the sleeve W2 is the end of the sleeve W2) in FIG. 28, the swelling of the sleeve W2 becomes uniform just inside the drum abutment surface of the sleeve roller, and the drum abutment surface of the sleeve roller and the sleeve abut as shown in FIG. With high accuracy.

After the completion of such a connection, the robot hand 2 is raised (step SA7), and the lock operation of the parallel hand lock cylinder 18 locks the lock plate 12 and the parallel hand fixing member 17. 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 the 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 this embodiment, the sleeve W2
The concentricity of the flange W1 after coupling is 15 with respect to the outer diameter of
The material of the sleeve W2 and the flange W1 may be a shrink-fitting metal such as Al, Fe, or the like so as to be within the micrometer. Further, the present invention can be applied not only to a developing sleeve of a laser beam printer, but also to an assembly of an 8 mm VTR drum requiring high-precision assembly, a manufacturing apparatus of a polygon mirror, and the like.

(Second Example) The manufacturing apparatus of this example is shown in FIG.
As shown in FIG. 30, this is a configuration example as an apparatus for joining a flange W1 by shrink fitting to a sleeve W2 accommodating a magnet roller W3.

When the flange W1 is connected to the sleeve W2 containing the magnet roller W3 as in this embodiment,
As shown in FIG. 29, the end of the magnet roller W3 protrudes outside through the flange W1. Therefore, in the robot hand 2 of the first example described above, the flange W1 cannot be directly pressed by the ball 24A. Therefore, in the present embodiment, instead of the robot hand 2 described above, a robot hand 2 ′ of FIG. 31 having a built-in angle absorbing mechanism is mounted. Hereinafter, points of the robot hand 2 'that are different from the robot hand 2 described above will be described.

The robot hand 2 'has a suction head 151 for vacuum-sucking the flange W1. A ball screw 150 having a rotatable ball 150A is attached to the suction head 151.
A plurality of suction head lock cylinders 152 mounted on one
As a result, the taper top 153 is pulled downward, whereby the taper top 153 is fitted and fixed in the fitting hole 17A of the parallel hand fixing member 17. That is, the suction head lock cylinder 152 allows the suction head 15
1 is drawn into and fixed to the parallel hand fixing member 17. At the start of the insertion of the flange W1, FIG.
As shown in (a), 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 and fixes the taper piece 153 in the fitting hole 17A. And the flange W
32, the parallel hand lock cylinder 18 immediately performs an unlocking operation as shown in FIG. 32 (b) to allow a relative displacement between the lock plate 12 and the parallel hand fixing member 17, and a suction head. The lock cylinder 152 performs an unlocking operation, and the parallel hand fixing member 17 and the suction head 1 are moved.
51 and a relative displacement between them. 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 W1 is pressed downward by the force F of the spring 6 of the cushion unit 9, and as shown in FIG.
7 is absorbed by the lock plate 12 through the thrust bearing 22 by Δx, and the suction head 151 is absorbed by Δθ with respect to the parallel hand fixing member 17.

Incidentally, since the outer diameter of the magnet roller W3 is smaller than the inner diameter of the sleeve W2, the position of the magnet roller W3 is not fixed in the sleeve W2, and it is inclined. If the inclination of the magnet roller W3 is large, the inner diameter φd
The end of the magnet roller W3 does not enter inside (see FIG. 30). Therefore, the magnetic material 1 installed on the turntable 5
14, the magnetic material 114 and the magnet roller W
3, the magnet roller W3 is moved to one side in the sleeve W2, and the magnet roller W3 is positioned parallel to the sleeve W2. Thereby, interference between the flange W1 and the magnet roller W2 is avoided, and the flange W1 can be inserted into the inner diameter machining hole 130 of the sleeve W2. In this example as well, as shown in FIG. 28, a relief portion is formed at the root of the flange W1 and the length is processed to an optimum length in advance, so that the sleeve W2 in the coupled state is formed. Control of the swelling position of the camera becomes possible.

As described above, according to the first embodiment, even when the sleeve roller is used in the form of a product,
When performing shrink fit, by controlling the bulging position,
The coaxiality of the sleeve and the sleeve roller can be set with high accuracy, the durability of the sleeve roller can be improved, and the recording speed can be increased.

(Second Embodiment) In the second embodiment, since the configuration of the image forming apparatus is the same as that of the first embodiment, the description is omitted. [Developing Sleeve Manufacturing Apparatus] (First Example) FIG. 33 is a side view of a developing sleeve manufacturing apparatus as a cylindrical body, FIG. 34 is a front view of the manufacturing apparatus, and FIG. 35 is a plan view of the manufacturing apparatus. is there. In the following,
The cylindrical member forming the main part of the developing sleeve is referred to as a sleeve W2, and the flange member 22 is referred to as a flange W1. However, in this case, the fitting length of the flange W1 is 5 mm or more.

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, and a sleeve W2 from a conveyor line (not shown)
And a turntable 203 for detecting the temperature of the sleeve W2.

FIG. 36 shows a schematic configuration of the robot hand 2. The robot hand 2 includes a horizontal compliance unit (alignment unit) Y1 and a horizontal / angle adjustment unit Y
2 and a flange holding unit Y3, and is attached to the arm 1A of the robot 1 via the cushion unit 9.

FIG. 37 is a sectional view of the entire robot hand 2.

In FIG. 37, first, the cushion unit 9 is attached to the rod 8 hanging from the arm 1A of the robot 1.
A linear sliding member 7 urged downward by a spring 6 is slidably guided in a vertical direction. The robot hand 2 is attached to the linear sliding member 7 and is constantly urged downward. Numeral 10 denotes the horizontal compliance as the unit Y1, for example, as shown in FIG.
38A, the horizontal displacement of the horizontal table 10B is allowed by the parallel plate-shaped spring 10A, or as shown in FIG. 38B, the horizontal displacement of the horizontal table 10B is allowed by the tension spring 10C. It has a configuration. When rigidity in the vertical direction is required, FIG.
It is preferable to use the compliance of (b). Spring 10
A, the centripetal force of the horizontal table 10B by 10C is 0.
1 kg or less is good.

Reference numeral 11 denotes a lock cylinder, and reference numeral 12 denotes a lock plate, between which a horizontal compliance 10 is formed. The lock plate 12 has a 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.

Reference numeral 15 denotes a parallel hand to which a pawl 16 for gripping the flange W1 is attached. Reference numeral 17 denotes a parallel hand fixing member that fixes the parallel hand 15 and has a plurality of parallel hand lock cylinders 18 attached thereto. A tapered piece 20 is attached to the upper end of the parallel hand lock cylinder 18. When pressurized air is supplied through a solenoid valve (not shown), the parallel hand lock cylinder 18
Is pulled downward, and the tapered piece 20 is locked with the lock plate 1.
The parallel hand 15 is pulled into and fixed to the lock plate 12 by being fitted into the second fitting hole 21. Further, a thrust bearing 22 is sandwiched between the lock plate 12 and the parallel hand fixing member 17, and the inclination of the parallel hand 15 is corrected by the retracting operation of the parallel hand lock cylinder 18.

A pressing support member 23 for inserting the flange W1 into the sleeve W2 and pressing the same is attached to the parallel hand fixing member 17.

33 to 35, the stocker 3 is a device for supplying the flange W1 to the robot 1 and stores the pallets 120 shown in FIG. 35 in multiple stages. Are stored in a matrix. Pallet 1 emptied due to flange 1 being supplied to robot 1
20 is automatically ejected and, instead, the flange W
A new pallet 120 stuffed with 1 is set at the supply position.

FIG. 39 is a detailed view of the high-frequency heating device 4. In the high-frequency heating device 4, when the sleeve W2 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. 39C), and the induced current I2 is applied to the sleeve W2.
Occurs, and the sleeve W2 self-heats. The current I
By changing the frequency of 1, the heating state from the surface of the sleeve W2 located in the coil 113 to the center can be changed, and there is versatility when the thickness of the sleeve W2 changes. In addition, in such induction heating, the portion to which the magnetic field is applied generates heat by itself, so that only the intended portion to be heated is locally and instantaneously compared to the case where heat is applied by heat conduction from the outside. Can be heated. Therefore, heating efficiency is high. Further, since the heated portion can be uniformly heated, the portion is thermally expanded uniformly, and the joining accuracy of shrink fit can be improved.

FIG. 40 and FIG.
FIG.

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.

The sleeve W is placed on the turntable 109.
3 (FIG. 3)
5), and a rotary cylinder 112 for pressing and fixing the sleeve W2 is provided in the receiver 111, and the positioning and holding of the sleeve W2 and the insertion and removal of the sleeve W2 can be performed according to the operation of the rotary cylinder 112. .

In FIG. 41, reference numeral 113 denotes a coil of the high-frequency heating device 4 described above. The sleeve W2, which is positioned and held by the receiver 111 and the rotary cylinder 112, is moved up and down by the vertical 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. 41, reference numeral 114 denotes a magnetic plate made of iron or the like. When the flange W1 is connected 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 turned.
When the stopper 115 (see FIG. 41) attached to the abutment 09 comes into contact with the rotation positioning shock absorber 116 (see FIG. 41) fixed to the high rotor block 107, the position of the turntable base 109 in the rotation direction is regulated. You.

FIG. 42 is a block diagram showing a control system of the manufacturing apparatus.

In FIG. 42, 50 is a central processing unit (CPU), and 52 is a non-volatile memory (ROM) which is connected to the CPU 50 by bus and contains 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. 43 (a) is a side view of the flange W1, and FIG. 43 (b) 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 which are connected to the processing hole 130 at the end of the sleeve W2 are processed so as to obtain a highly accurate roundness of 2 μm and a coaxiality of 3 μm. Is given. Sleeve W
The end of No. 2 is bored, and its bore 13
The coaxiality of 0 and the outer diameter of the sleeve W2 is set with high precision, the unevenness of uneven thickness as shown in FIG. 44 (b) is small, and the thickness becomes uniform as shown in FIG. 44 (a). I have. Note that a preferable range of uneven thickness is 10 μm or less.

Therefore, it is possible to join the flange W1 and the sleeve W2 without biting the machined surfaces thereof and to determine the coaxiality of the protrusion 134 of the flange W1 with respect to both ends of the sleeve W2 with high accuracy. It becomes possible.

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

FIG. 45 is a flowchart for explaining the operation on the robot 1 side, and FIG. 46 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 claw 16 of the robot hand 2 clamps the flange W1 (step SA1). After that, robot hand 2
Moves above the coil 113 of the high-frequency heating device 4 (step SA2), and the lock plate 1
Release the lock of No. 2 and wait (step SA3).

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 for positioning (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. 47 (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. Thereby, as described above, the opening of the sleeve W2, that is, the inner diameter processing hole 13 on the upper end side
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. 48 shows that the upper end of the sleeve W2 is at time t.
1 shows a change in temperature when heating is performed, and FIG. 49 shows a relationship between the temperature of the sleeve W2 and the amount of expansion.

When the diameter of the bore 130 of the sleeve W2 is increased, the connection 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 heating the sleeve W2, the coil 11
3 is stopped, and the high-frequency heating device 4
Is sent, and the robot hand 2 descends (step SA4). As a result, the flange W1 clamped to the claw 16 becomes
It is inserted gradually inside.

When the axes of the flanges W1 are displaced when the flanges W1 are inserted into the sleeve W2, if the deviations are within the amount corresponding to the chamfering, the deviations are absorbed by the horizontal compliance 10 and the flanges W1 are removed. The connecting portion 131 is smoothly formed on the inner diameter machining hole 13 of the sleeve W2.
Inserted in 0. After the insertion of the flange W1, when the temperature sensor 203 detects the sleeve temperature at which the flange W1 and the sleeve W2 close from each other and turn into a shrinkage relationship, or when the temperature sensor 203 detects that the temperature is slightly lower than the temperature. Then, as shown in FIG. 50B, the parallel hand 15 releases the clamp of the flange W1 (step SA6), and releases the flange W1 from between the claws 16. At this time, the flange W1 is assembled along the inner surface of the sleeve.

Also, by releasing the parallel clamp (step SA6) in the robot hand 2, the position of the flange W1 is regulated along the inner surface of the sleeve W2, and at the same time, the flange W1 at room temperature is rapidly moved to the upper end of the sleeve W2. Combination ends when the temperature of the part 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 at the same time, a signal to end the insertion of the flange W1 is sent to the turntable 5, and the turntable 5 turns off the vertical moving cylinder 101. (Step SB4), and after the high rotor 106 rotates to the discharge station of the sleeve W2 (step SB4).
B5) By turning off the rotary cylinder 112 and releasing 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 to the next flange W
1 is moved at high speed onto the stacker 3 to clamp (step SA9).

The heating device 4 is not limited to the 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 this embodiment, the sleeve W2
The concentricity of the flange W1 after coupling is 15 with respect to the outer diameter of
The material of the sleeve W2 and the flange W1 may be a shrink-fitting metal such as Al, Fe, or the like so as to be within the micrometer. Further, the present invention can be applied not only to a developing sleeve of a laser beam printer, but also to an assembly of an 8 mm VTR drum requiring high-precision assembly, a manufacturing apparatus of a polygon mirror, and the like.

(Second Example) The manufacturing apparatus of this example is shown in FIG.
As shown in FIG. 52, this is a configuration example as an apparatus for joining a flange W1 having a short fitting length (5 mm or less) to a sleeve W2 accommodating a magnet roller W3 by shrink fitting.

When the flange W1 having a short fitting length is connected to the sleeve W2 having the magnet roller W3 built therein as shown in FIG. 51, as shown in FIG.
The end of 3 will penetrate the flange W1 and protrude to the outside. For this reason, in the robot hand 2 of the above-described embodiment, since the fitting length is short, the coupling accuracy between the sleeve W2 and the flange W1 is difficult to obtain. Therefore, in the present embodiment, instead of the robot hand 2 described above, a robot hand 2 ′ of FIG. 53 having a built-in angle absorbing mechanism is mounted. Hereinafter, points of the robot hand 2 'that are different from the robot hand 2 described above will be described.

The robot hand 2 'has a suction head 151 for vacuum-sucking the flange W1. A ball screw 150 having a rotatable ball 150A is attached to the suction head 151.
A plurality of suction head lock cylinders 152 mounted on one
As a result, the taper top 153 is pulled downward, whereby the taper top 153 is fitted and fixed in the fitting hole 17A of the parallel hand fixing member 17. That is, the suction head lock cylinder 152 allows the suction head 15
1 is drawn into and fixed to the parallel hand fixing member 17. At the start of the insertion of the flange W1, FIG.
As shown in (a), 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 and fixes the taper piece 153 in the fitting hole 17A. And the flange W
54, the parallel hand lock cylinder 18 immediately releases the lock, as shown in FIG. 54 (b), to allow the relative displacement between the lock plate 12 and the parallel hand fixing member 17, and the suction head. The lock cylinder 152 performs an unlocking operation, and the parallel hand fixing member 17 and the suction head 1 are moved.
51 and a relative displacement between them.

When the flange W1 is connected, the suction head 151 is pressed downward by the force F of the spring 6 of the cushion unit 9, and the parallel hand fixing member 17 is moved to the lock plate 12 as shown in FIG. Thrust bearing 2
2, the positional deviation is absorbed by Δx, and the angle of the suction head 151 with respect to the parallel hand fixing member 17 is absorbed by Δθ.

Then, in the state as shown in FIG. 54 (b), when the suction head is pressed against the end of the sleeve, the temperature sensor 203 changes from the relationship of the clearance between the flange W1 and the sleeve W2 to the relationship of the clearance. When the temperature is detected, or when it is detected that the temperature is slightly lower than that, by releasing the suction of the suction head, the coupling accuracy can be obtained even with the flange W1 having a short fitting length.

Since the outer diameter of the magnet roller W3 is smaller than the inner diameter of the sleeve W2, the position of the magnet roller W3 in the sleeve W2 is not determined, and the magnet roller W3 is inclined. If the inclination of the magnet roller W3 is large, the inner diameter φd
The end of the magnet roller W3 does not enter inside (see FIG. 52). Therefore, the magnetic material 1 installed on the turntable 5
14, the magnetic material 114 and the magnet roller W
3, the magnet roller W3 is moved to one side in the sleeve W2, and the magnet roller W3 is positioned parallel to the sleeve W2. Thereby, interference between the flange W1 and the magnet roller W2 is avoided, and the flange W1 can be inserted into the inner diameter machining hole 130 of the sleeve W2.

[Specific Example of Manufacturing Method of Developing Sleeve] (First Example) In the developing sleeve of this example, a flange is shrink-fitted to one end of the sleeve by the manufacturing apparatus of the above-described second example. It was manufactured by press-fitting another flange into the other end of the sleeve.

The sleeve W2 has an outer diameter of 12 mm and an inner diameter of 1 mm.
An extruded aluminum alloy cylindrical tube having a length of 0.4 mm and a length of 246 mm is used as a raw material, and one end thereof has an inner diameter of 10.
An inner diameter processing hole 130 having a length of 610 mm and a length of 5 mm was cut. The sleeve W2 cut in such a manner is as shown in FIG.
When the sleeve W2 is rotated while holding the positions A and B at both ends as shown in FIG.
μm, and the perpendicularity of the end face was 3 μm. Then, the sleeve W2 was set in the above-described manufacturing apparatus of the first example with the inner diameter processing hole 130 facing upward. On the other hand, the flange W1 has an outer diameter of the joint 131 of 10.618 mm and a length of the joint 131 of 1.5 mm.

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 into the developing sleeve as described later. 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 1.5 mm due to the magnetic force of the magnet roller.
The range of mm is appropriate. Further, the coupling strength of the flange member in the developing sleeve is required to be 5 kg to 50 kg from the relation of bending of the flange due to driving rotation and loss, and 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 interference is less than 0.04% of the reference inner diameter, the required bonding strength cannot be obtained, and if the interference is more than 0.2% of the reference inner diameter, the required strength is excessive. If the bond length is 1 mm or less,
There is a possibility that the flange portion after the connection may fall, and it is unnecessary to make the flange portion 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 run-out 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. In order to obtain such accuracy, it is necessary that the inner diameter deflection (inlaw deflection) of the connecting portion of the cylindrical member be 10 μm or less and the perpendicularity of the end face be 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 deflection of the flange member is 15 μm or less.

The cylindrical body such as the developing sleeve and the photosensitive drum should have a preferable bonding strength even in all kinds of environments such as high temperature, high humidity, low temperature and low humidity in consideration of the environmental conditions of the copier and printer provided with the cylinder. 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 the developing sleeve, when the flange member is connected to the cylindrical member in the presence of the magnet roller in the cylindrical member, fluctuation of the magnetic force of the magnet roller due to heating for expanding the diameter of the cylindrical member is avoided. Therefore, it is necessary to suppress the heating temperature of the cylindrical member. If there is a change in the magnetic force of the magnet roller, the image deteriorates. Due to such necessity, the diameter expansion range of the cylindrical member is set to 0.3 to 0.5% of the reference inner diameter. In addition, the heating temperature is set to 200
By setting the temperature to not more than ° C., a change in the magnetic force of the magnet roller can be suppressed.

When the flange W1 and the sleeve W2 are connected, the high-frequency heating device 4 is used to set the coil energizing power to a value of 0.5.
7 kW, 5 seconds from the upper end of the sleeve W2
By heating the range of mm to about 200 ° C., the inner diameter processing hole 130 of the sleeve W2 was expanded by 42 μm. Then, the flange W1 was inserted into the sleeve W2 and joined.

FIG. 56 shows the power supply and the power supply time for heating the end of the sleeve W2 to 200 ° C. when the diameter of the sleeve W2 changes.

As shown in FIG. 55 (b), the developing sleeve material having the flange W1 connected to one end side (the 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 at both ends of the flange W1 was measured. The deflection is 10 μm
Met. Also, a force of 10 kg was required to forcibly pull out the flange W1 from the sleeve W2.

When the precision of the shake is set to 10 μm, the occurrence of the shake of the entire sleeve in the connection with the means for rotating the sleeve is within a range for obtaining a good image. Further, the pull-out strength of 10 kg can be said to be a sufficient strength from the relation of the bending of the flange to the drive rotating means and the loss.

Further, such a developing sleeve material was subjected to sandblasting as shown in FIG. In FIG. 57, 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. The abrasive grains 211 are sprayed while rotating the developing sleeve material W. The sandblast conditions are shown below.

Abrasive particles; alumina powder (manufactured by Showa Denko KK, # 100) Discharge pressure: 2.8 kg / cm 2 Nozzle distance: 120 mm Blasting time: 60 seconds Sleeve rotation speed: 60 rpm After that, blast treatment (Ra = 2) ~ 2.5μ
m) As shown in FIG. 58, a coating material 212 for improving the charging property is sprayed from a spray 211 on the developed sleeve material W to form a coat layer.
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 mixed so as to be 0%, put into a paint mixing apparatus (for example, a paint shaker) together with glass beads, and adjusted by performing dispersion for 5 hours.

Thereafter, as shown in FIG. 59, after inserting the magnet roller W3 into the developing sleeve material W having the flange W1 connected only to one end of the sleeve W2, 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.

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

It should be noted that, instead of forming the irregularities by the blasting process shown in FIG. 57, in the painting process shown 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, polystyrene, 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 and 3
If it is 0 μm or more, the particle size is too large, and the adhesion to the resin is deteriorated.

Further, in order to suppress bending when the flange W1 is inserted, the sleeve W2 in which the magnet roller W3 is incorporated may be centerless or cut.

(Second example) The same material as in the first example described above,
By the same method, a flange W1 was joined to one end of the sleeve W2 to prepare a developing sleeve material. The inner diameter deflection (inlaw deflection) was 7 μm, and the perpendicularity to the end face was 4 μm. Thereafter, a blast treatment and a coat layer for improving the charge-imparting property were formed as in the first example described above. 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 example.

Thereafter, as in the first example described above, 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. The deflection of the flange W4 is 10μ.
m.

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

(Third Example) In the developing sleeve of this example, the flange is shrink-fitted to the other end of the sleeve in which the flange is coupled to one end of the sleeve by the manufacturing apparatus of the second example described above. Manufactured by

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1 mm.
This is an extruded cylindrical tube made of an aluminum alloy having a length of 8.4 mm and a length of 330 mm, and a flange having a through hole having an inner diameter of 8 mm is connected to one end of the cylindrical tube. This sleeve W
At the other end of 2, an inner diameter processing hole 130 having an inner diameter of 18.635 mm and a length of 4 mm was cut. As shown in FIG. 55 (c), when the sleeve W2 is rotated while holding the positions A and B at both ends of the sleeve W2, the deflection at the point a, that is, the in-loaf is 7 μm, and the squareness of the end face is as shown in FIG. Is 4μ
m.

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

Thereafter, the manufacturing apparatus of the second example described above inserts the magnet roller W3 into the sleeve W2 as shown in FIG. The flange W1 was shrink-fitted into the processing hole 130. The flange W1 had an outer diameter of the coupling portion 131 of 18.645 mm, a length of the coupling portion 131 of 3.5 mm, and an inner diameter of a through hole through which an end of the magnet roller W3 penetrated was 10 mm. When the flange W1 and the sleeve W2 are connected, the high-frequency heating device 4 heats the inner diameter processing hole 130 at the other end of the sleeve W2 to about 200 ° C. with a power supply of 2 kW and a power supply time of 1 second.
The diameter was expanded by μm. Then, the flange W1 was inserted into the sleeve W2 and joined.

As shown in FIG. 55 (a), the developing sleeve material having the flange W1 connected to one end side (the 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 at both ends of the flange W1 was measured. The deflection is 11μm
Met. In addition, a force of 20 kg or more was required to forcibly pull out the flange W1 from the sleeve W2.

Then, as a result of using the developing sleeve thus completed in the same manner as in the first example, a good image was obtained.

(Fourth Example) As in the third example, the developing sleeve of the present example is provided with the manufacturing apparatus of the second example described above with respect to the other end of the sleeve having one end connected to the flange. By shrink-fitting the flange.

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1 mm.
An extruded cylindrical tube made of aluminum alloy having a length of 8.8 mm and a length of 330 mm, and a sintered oil-impregnated bearing having an inner diameter in a range of 5.01 to 5.04 is fixed in a flange connected to one end thereof. The shaft of one end of the magnet roller W3 is supported by the bearing. FIG. 61 (c) shows the inside of the other end of the sleeve W2.
As shown in the figure, two steps of spigot processing were performed. And
The sleeve W2 having the flange joined to one end as described above.
, A coating liquid was coated in the same manner as in the second example described above.

Thereafter, after the magnet roller W3 is inserted into the sleeve W2, as shown in FIG. 61 (a), the shaft at the other end of the magnet roller W3 has the inner diameter of 5.01.
It was supported by a sintered oil-impregnated bearing 150 in the range of ~ 5.04. The shaft portion at the other end of the magnet roller W3 has an outer diameter of 5 mm and a dimensional tolerance of f8 (Japanese Industrial Standards JIS), that is, φ4.972 to φ4.990.
In addition, the shaft portion on one end side of the magnet roller W3 is also pivotally supported. In the sleeve W2, the spigot part connected to the flange W1 has an inner diameter of 19.003 and a length of 2.5 mm.
As shown in FIG. 55C, when the sleeve W2 was rotated while holding the positions A and B at both ends, the deflection at the point a, that is, the in-row deflection was 6 μm, and the squareness of the end face was 3 μm.

Then, such a sleeve W2 was set in the manufacturing apparatus of the second example described above, and a flange W1 was shrink-fitted to the other end of the sleeve W2. The flange W1
Has an outer diameter of 19.017 mm, a length of 2.5 mm, and an inner diameter of 6 ± 0.2 mm. The other end of the sleeve W2 was expanded by 76 μm by the heating device 4.

[0170] In this way, the flange W is attached to the sleeve W2.
55 (a) with respect to the developing sleeve in which 1 is shrink-fitted.
As described above, the deflection at the position a of the flange W1 when the sleeve W2 was rotated while holding the positions A and B at both ends was measured. The deflection was 9 μm. Also, a force of 15 kg or more was required to forcibly pull out the flange W1 from the sleeve W2.

Then, as a result of using the thus-developed developing sleeve in the same manner as in the first example, a good image was obtained.

The bearing 150 may be a sintered oil-impregnated bearing, a polyacetal resin, a heat-resistant engineering plastic, or the like, without any limitation.

(Fifth Example) The developing sleeve of the present example is similar to the fourth example described above, except that the developing device of the second example described above is attached to the other end of the sleeve whose one end is connected to the flange. By shrink-fitting the flange.

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1 mm.
An extruded cylindrical tube made of aluminum alloy having a length of 8.8 mm and a length of 330 mm, and a sintered oil-impregnated bearing having an inner diameter in a range of 5.01 to 5.04 is fixed in a flange connected to one end thereof. The shaft of one end of the magnet roller W3 is supported by the bearing. FIG. 61 (b) shows the inside of the other end of the sleeve W2.
And the inner diameter is 18.903.
mm, the length was 5 mm, the inflation was 6 μm, and the perpendicularity of the end face was 4 μm. Then, the coating liquid was coated on the sleeve W2 having the flange coupled to one end in the same manner as in the second example described above.

Thereafter, after inserting the magnet roller W3 into the sleeve W2, as shown in FIG. 61B, the shaft at the other end of the magnet roller W3 has the inner diameter of 5.01.
It was supported by a sintered oil-impregnated bearing 151 in the range of ~ 5.04. The shaft portion at the other end of the magnet roller W3 has an outer diameter of 5 mm, and a dimensional tolerance with respect to the bearing 150 of f8, that is, φ.
4.972 to 4.990. In addition, the shaft portion on one end side of the magnet roller W3 is also pivotally supported.

Then, such a sleeve W2 was set in the manufacturing apparatus of the second example described above, and a flange W1 was shrink-fitted to the other end of the sleeve W2. The flange W1
Has an outer diameter of 18.915 mm, a length of 3.5 mm, and an inner diameter of 5.01 to
A sintered oil-impregnated bearing 152 within a range of 5.04 mm is fixed. The other end of the sleeve W2 is connected to the fourth
In the same manner as in the above example, the heating device 4 was heated to approximately 200 ° C. for 2 seconds with a power supply of 1 second and a power supply time of 1 second to expand the diameter by 76 μm.

In this way, the flange W is attached to the sleeve W2.
55 (a) with respect to the developing sleeve in which 1 is shrink-fitted.
As described above, the deflection of the position a of the flange W1 when rotating while holding the positions A and B at both ends of the sleeve W2 was measured. The run-out was 9 μm. In addition, a force of 20 kg or more was required to forcibly pull out the flange W1 from the sleeve W2.

Then, as a result of using the thus-developed developing sleeve in the same manner as in the first example, a good image was obtained. (Sixth, Seventh, and Eighth Examples) FIG. 62 shows data for sixth, seventh, and eighth examples of the developing sleeve. These examples are manufactured by changing the dimensions such as the interference in the third example described above. Also,
Comparative Examples 1 to 5 were also prepared and evaluated.

As Comparative Examples 6, 7, and 8, the following developing sleeves were also prepared and evaluated.

In Comparative Example 6, when the developing sleeve of the third example described above was manufactured, the magnet roller W3 was replaced with the magnetic material 11
4, the flange W1 was shrink-fitted without positioning. As a result, the flange W1 is obliquely inserted and connected, the deflection of the flange W1 becomes 40 μm, and the formed image has a pitch unevenness, which has a practical problem.

In Comparative Example 7, when the developing sleeve of the fourth example described above was manufactured, the magnet roller
4, the flange W1 was shrink-fitted without positioning. As a result, the flange W1 was obliquely inserted and connected, and the run-out of the flange W1 became 50 μm.

In Comparative Example 8, the flange W1 was shrink-fitted without fixing the magnet roller W3 when the developing sleeve of the fifth example described above was formed. As a result, the flange W1 was inserted obliquely and entered only partway. The force required to pull out the flange W1 was also 5 kg or less. (Ninth Example) A sintered oil-impregnated bearing having an inner diameter in the range of 5.01 mm to 5.04 mm is provided at one end of a SUS304 sleeve W2 having an outer diameter of 20.0 mm, an inner diameter of 18.8 mm, and a length of 321.4 mm. After attaching the flange, the other end of the sleeve W2 was subjected to two-step spigot processing as shown in FIG. 61 (a). Thereafter, a coating liquid was coated in the same manner as in the first example described above. Next, after inserting the magnet roller W3 into the sleeve W2, it was held by the sintered oil-impregnated bearing. The bearing has an outer diameter of 5 mm, and a dimensional tolerance with respect to the inside of the other end of the sleeve W2 is f8, that is, φ4.9.
72 ~ 4.990, inner diameter 5.01mm ~ 5.04mm
In the range. The spigot portion at the other end of the sleeve W2 to which the flange W1 is coupled has an inner diameter of 19.003 mm and a length of 2.003.
5 mm, inflation 7 μm, and end surface perpendicularity 4 μm.

The other end of the sleeve W2 is connected to the
kw, heating time to about 200 ° C. for 1 second, 7
The diameter was increased by 6 μm, and the sleeve W1 was inserted and joined in the same manner as in the first example described above. The sleeve W1 has an outer diameter of 19.016 mm, a coupling length of 2.3 mm, and an inner diameter of 6 ±
0.2 mm.

After connecting the flange W1 and the sleeve W2, the run-out of the flange W1 was measured to be 11 μm, and 15 kg was required to forcibly pull out the flange W1.
The above pulling force was required. In addition, as a result of using the developing sleeve manufactured as described above in the same manner as in the first example, a good image was obtained without problems such as pitch unevenness.

(Tenth Example) A developing sleeve was produced in the same manner as in the fifth example except that the sleeve W2 of the fifth example was changed from aluminum to SUS304. As a result, the run-out of the flange W1 was 10 μm, and the pull-out force was 20 μm.
kg.

[Configuration Example of Developing Sleeve] FIGS. 63 to 67
Each shows a different configuration example of the developing sleeve. In these figures, reference numeral 160 denotes a sintered oil-impregnated bearing for supporting the magnet roller W3.

In FIG. 63, the bearing 160 is provided only on the driving side (left flange W1 side) of the developing sleeve. The flange W1 on the non-drive side on the right side in the figure can be made of plastic, and the flange W1 on the left side in the figure can be made of aluminum. In FIG. 64A, bearings 160 are provided at both ends. Note that the bearing 160 on the left side in the figure may be mounted inside a sleeve W2 formed in two steps as shown in FIG. 64 (b). FIG.
No. 5 has a configuration in which two bearings 160 are provided on the non-drive shaft side (right flange W1 side) of the developing sleeve. FIG. 66 (a) has a configuration in which the left flange W1 of FIG. 64 is fitted in a sleeve W2, and FIG. 66 (b) has a two-stage spigot forming. The bearing 160 is mounted inside the left side of the sleeve W2. 67 has a configuration in which a bearing 160 is mounted inside the left flange W1.

Each of the developing sleeves shown in FIGS. 64 to 67 can be manufactured by using the above-described manufacturing apparatus of the second example. [Specific Example of Manufacturing Method of Photosensitive Drum] A cylindrical tube as an extruded and drawn product of an aluminum alloy having an outer diameter of 28.5 mm, an inner diameter of 27.1 mm, and a length of 260.5 mm is a cylindrical member of the photosensitive drum (hereinafter, “sleeve”). The inside of one end was cut with an inner diameter of 26.900 mm and a length of 7 mm. The inner diameter deflection (inlaw deflection) at this time is 8
μm, and the perpendicularity of the end face was 3 μm.

Next, an aqueous ammonia solution of casein (11.2 g of casein, 1 g of 28% ammonia water, 222 m of water)
1) was applied by a dip coating method, and dried to form an undercoat layer having a coating amount of 1.0 g / cm 2.

Next, 1 part by weight of aluminum chloride phthalocyanine, brillal resin (trade name; Esrec B)
M-2; manufactured by Sekisui Chemical Co., Ltd.) and 1 part by weight of isopropyl alcohol were dispersed by a ball mill for 4 hours. This dispersion was applied on the previously formed undercoat layer by a dip coating method, and dried to form a charge generation layer.
At this time, the film thickness was 0.3 μm.

Also, 1 part by weight of a hydrazone compound, 1 part by weight of a polysulfone resin (trade name: P1700; manufactured by Union Carbide Co., Ltd.) and 6 parts by weight of monochlorobenzene were mixed and dissolved by stirring with a stirrer. This liquid was applied on the charge generation layer by a dip coating method, and dried to form a charge transport layer having a thickness of 2 μm, thereby producing a sleeve W2 of the photosensitive drum.

The flange W1 is attached to one end of the sleeve W2 by the manufacturing apparatus of the second example described above.
Was combined. The flange W1 has a joint diameter of 26.9.
13 mm, coupling length is 2.0 mm, sleeve W2
Is heated to about 200 ° C. by applying a power of 3 kW and a power-on time of 1 second to a range of 3 mm from one end of the heating device 4,
The diameter was expanded by 108 μm, and the flange W1 was inserted and joined.

Then, the run-out of the flange W1 was measured in the same manner as in FIG. 55, and as a result, it was 10 μm.
The pulling force required to pull out the flange W1 is 1
It was 5 kg or more. Thereafter, a flange was pressed into the other end of the sleeve W2 to complete the photosensitive drum.

In order to obtain a good latent image using the photosensitive drum, it is preferable that the run-out of the flange member be 20 μm or less. By setting the accuracy to 20 μm or less, it is possible to suppress the occurrence of runout of the entire photosensitive drum in connection with the means for rotating and driving the photosensitive drum. In order to obtain such accuracy, the inner diameter deflection (inlay deflection) of the connecting portion of the cylindrical member is set to 10 μm or less,
It is necessary that the perpendicularity of the end face be 10 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 run-out of the flange member becomes 20 μm or less.

The photosensitive drum produced 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 drum pitch unevenness and fog.

FIGS. 68 and 69 are sectional views in the axial direction of the photosensitive drum unit. 201
Denotes a photosensitive drum and a flange 203 and a gear 2 at one end thereof.
The flange 202 having 02c is fixed. The gear portion 202c is driven to rotate by meshing of a drive gear (not shown). Reference numeral 204 denotes a housing of the cartridge, which is rotatably mounted in the housing by drum positioning pins 206 and 207.

As described above, according to the manufacturing method of the second embodiment, a highly accurate developing sleeve can be realized, and the processing cost of the cylindrical member and the flange member alone can be reduced. Cost can be reduced. (Third Embodiment) In the third embodiment, the configuration of an image forming apparatus and the configuration of a developing sleeve manufacturing apparatus are the same as those of the first embodiment, and the configuration and operation of the control system of the manufacturing apparatus are different. Therefore, the description of the same part is omitted.

FIG. 70 is a block diagram showing a control system of the present manufacturing apparatus.

In FIG. 70, 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-supply-backed 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.
Reference numeral 62 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. 6
Reference numeral 6 denotes an I / O interface for taking in information of another control device 68 such as the high-frequency heating device 4, a solenoid valve 70, a sensor 72 and the like into the CPU 50. 74
Is a communication interface for connecting the CPU 50 with the external teaching device 76, the display device 78, and the input keyboard 80. ROM 52, RAM 54, counter 56, converter 62, interfaces 66, 74
Are connected to the CPU 50 by a bus 82. Reference numeral 73 denotes a timer for controlling the drive timing of the robot hand.

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

FIG. 71 is a flow chart for explaining the operation on the robot 1 side, and FIG. 72 is a flow chart 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 claw 16 of the robot hand 2 clamps the flange W1 (step SA11). Thereafter, the robot hand 2 moves above the coil 113 of the high-frequency heating device 4 (step SA12), releases the lock of the lock plate 12 by the lock cylinder 11, and waits (step SA1).
3).

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 for positioning (step SB11). Then, the high rotor 1
06, the sleeve W2 rotates together with the turntable base 109 and the like (step SB12), and the stopper 1
15 comes into contact with the shock absorber 116. When they come into contact, the sleeve W2 is located below the coil 113. Thereafter, the vertical movement cylinder 101 is turned on, the turntable base 109, the high rotor block 107 and the like are raised, and the upper end of the sleeve W2 is positioned inside the coil 113 as shown in FIG. 23 (step SB13). With such positioning of the sleeve W2, a drive signal is sent to the high-frequency heating device 4 and the coil 11
3 is energized to start heating. As a result, as described above, the processed portion of the sleeve W2, that is, the portion of the inner diameter processing hole 130 on the upper end side generates heat by the induced current, and the inner diameter processing hole 130 expands in diameter due to thermal expansion.

The temperature change when the upper end of the sleeve W2 is heated from the time t1 is the same as in FIG.
The relationship between the temperature of the sleeve W2 and the expansion amount is the same as in the case of FIG.

[0205] By expanding the inner diameter processing hole 130 of the sleeve W2, the connecting portion 1 between the inner diameter processing hole 130 and the flange W1 is increased.
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.

At the same time as the drive signal to the high-frequency heating device 4, the drive signal is sent to a timer built in the robot controller or a timer 73 connected to the outside. This timer measures the sleeve heating time t0 (t0 = t0 =
t2-t1; FIG. 24), the time is up by a value t4 (t4 = t0-t3) obtained by subtracting the robot insertion time t3, and a robot descent signal is output (SA14). As a result, the flange W1 clamped by the claw 16 is inserted into the inner diameter processing hole 130 of the sleeve at the same time when the sleeve is heated by the high-frequency heating device. Then, after the outer peripheral portion of the flange W1 contacts the end surface 132 of the sleeve W2, the flange W1 is pressed by the force of the spring 6 in the cushion unit 9.

When the axes of the flanges W1 are displaced when the flanges W1 are inserted into the sleeve W2, if the deviations are within the amount corresponding to the chamfering, the deviations are absorbed by the horizontal compliance 10 and the flanges W1 are removed. The connecting portion 131 is smoothly formed on the inner diameter machining hole 13 of the sleeve W2.
Inserted in 0. Also, at the start of the insertion of the flange W1, as shown in FIG.
8 fixes the taper piece 20 in the fitting hole 21 and, after the flange W1 is inserted, as shown in FIG. 73 (b).
Immediately, the parallel hand lock cylinder 18 performs an unlocking operation (step SA15), allowing relative displacement between the lock plate 12 and the parallel hand fixing member 17, and releasing the clamp of the flange W1 by the parallel hand 15 (step SA15). Step SA16), release the flange W1 from between the claws 16. At this time, the flange W1 is pressed downward by the force F of the spring 6 of the cushion unit 9, and the pressing force F becomes a vertical force F1 and a horizontal force F2 with the ball 24A as a fulcrum.

Further, by releasing the parallel hand lock (step SA15) and the parallel clamp release (step SA16) in the robot hand 2, the flange W1 is released.
Is pressed against the end face 132 of the sleeve W2 to regulate its position. At the same time, the normal temperature flange W1 rapidly approaches the temperature of the upper end of the sleeve W2, and the coupling is completed. 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 coupling, the robot hand 2 is raised (step SA17), and the lock operation of the parallel hand lock cylinder 18 locks the lock plate 12 and the parallel hand fixing member 17. At the same time, a signal to end the insertion of the flange W1 is sent to the turntable 5,
The turntable 5 is lowered by turning off the vertical movement cylinder 101 (step SB14), and after the high rotor 106 rotates to the discharge station of the sleeve W2 (step SB15), the rotary cylinder 112 is turned off.
Release the sleeve W2 (step SB
16), and discharge the sleeve W2 (step SB1)
7). On the other hand, the robot hand 2 has a lock cylinder 11
Lock horizontal compliance 10 by
It moves on the stacker 3 at high speed to clamp the next flange W1 (step SA19).

[0210] The heating device 4 is not limited to the high frequency heating device, but may be a device heated by a cartridge heater, a halogen lamp, a xenon lamp or the like. "Specific Example of Manufacturing Method of Developing Sleeve" The developing sleeve of this example is manufactured by shrink-fitting a flange at one end of the sleeve by the manufacturing apparatus of the first embodiment described above.

This embodiment will be described with reference to FIG. Sleeve W2 has an outer diameter of 20 mm and an inner diameter of 18.5 m
m, an aluminum alloy extruded and drawn cylindrical tube having a length of 333 mm and having an inner diameter of 18.8-18.
Internal diameter processing hole 130 of 805 mm and length 5 mm (25 ° C.)
Was machined.

On the other hand, the connection outer diameter of the aluminum flange is 18.810 to 18.84 by cutting.
It is cut to 0 mm (25 ° C.). That is, 25
The minimum margin at 5 ° C. is 5 μm.

In this state, when the end of the sleeve is heated to 135 ° C. by the above-described manufacturing apparatus, the inner diameter of the sleeve is thermally expanded to 18.845 to 18.850 mm, and the minimum insertion gap with the flange is 5 μm. .

According to the sequence in which the heating is completed and the insertion is completed at the same time, the flange has a minimum length of 5 μm.
Is inserted into the joint portion of the sleeve while keeping the gap.

After the insertion, the flange comes into contact with the sleeve and thermally expands to be in a connected state.

On the other hand, if the insertion is started at the same time as the heating of the sleeve is completed as shown in FIG. 75, the inner diameter of the sleeve is reduced before the insertion is completed, and the relationship between the flange and the sleeve is reduced, and the relationship between the sleeve and the shrinkage is reduced. May occur, causing insertion errors.

[0219]

As described above, according to the present invention, even when a sleeve roller is used in the form of a product, the coaxiality of the sleeve and the sleeve roller is controlled by controlling the swelling position when performing shrink fitting. This makes it possible to set the precision with high accuracy, improve the durability of the sleeve roller, and increase the recording speed.

Further, a high-precision developing sleeve can be realized, and the processing cost of the cylindrical member and the flange member alone can be reduced. As a result, the cost of the developing sleeve can be reduced.

Further, not only high precision of the thin developing sleeve can be achieved by an inexpensive manufacturing method, but also a high magnetic force developing system can be used due to the product form, and the durability of the developing blade can be improved.

In addition, in the product form, the interference between the flange and the sleeve can be increased and the developing sleeve can be rotated at a high torque, so that the printout can be speeded up, the image quality can be improved, and the developing sleeve can be highly durable. Can be achieved.

[0221]

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a main part of an image forming apparatus.

FIG. 2 is a block diagram of the image forming apparatus shown in FIG.

FIG. 3 is a perspective view of a developing sleeve and a photosensitive drum shown in FIG.

FIG. 4 is a sectional view of an end of the developing sleeve shown in FIG.

FIG. 5 is a side view of the driving mechanism of the developing sleeve shown in FIG.

6 is a cross-sectional view of a main part of a drive mechanism of the developing sleeve shown in FIG.

FIG. 7 is a side view for explaining the positional relationship between the developing sleeve and the photosensitive drum shown in FIG.

FIG. 8 is a side view showing the first embodiment of the developing sleeve manufacturing apparatus according to the present invention.

FIG. 9 is a front view of the manufacturing apparatus shown in FIG.

FIG. 10 is a plan view of the manufacturing apparatus shown in FIG.

11 is a schematic configuration diagram of the robot hand shown in FIG.

FIG. 12 is a sectional view of the robot hand shown in FIG. 8;

FIG. 13 is an enlarged sectional view of a distal end portion of the robot hand shown in FIG.

14 is a schematic configuration diagram of the cushion unit shown in FIG.

FIG. 15 is an enlarged view of the high-frequency heating device shown in FIG.

FIG. 16 is a sectional view of the turntable shown in FIG. 8;

FIG. 17 is a side view of the turntable shown in FIG. 8;

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

FIG. 19 is a side view of a flange and a sleeve connected by the manufacturing apparatus of FIG. 8;

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

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

FIG. 22 is a flowchart for explaining the operation of the turntable of the manufacturing apparatus shown in FIG.

FIG. 23 is a sectional view of a sleeve and a flange connected by the manufacturing apparatus of FIG. 8;

24 is a diagram for explaining the relationship between the heating time and the temperature of the sleeve by the manufacturing apparatus of FIG.

FIG. 25 is a diagram for explaining the relationship between the temperature of the sleeve heated by the manufacturing apparatus of FIG. 8 and the amount of expansion.

FIG. 26 is an enlarged view of a main part for describing a coupling operation of a sleeve and a flange by the manufacturing apparatus of FIG. 8;

FIG. 27 is a diagram illustrating a change in a bulging position from an end surface of a sleeve.

FIG. 28 is a view showing a state where the swelling position of the sleeve matches the position of the outer peripheral surface of the sleeve roller.

FIG. 29 is a sectional view of a developing sleeve that can be manufactured by the manufacturing apparatus of FIG. 8;

FIG. 30 is a cross-sectional view of a main part for describing a heating operation state according to a second example of the developing sleeve manufacturing apparatus of the first embodiment.

FIG. 31 is a sectional view of a robot hand in a second example of the developing sleeve manufacturing apparatus.

FIG. 32 is an enlarged view of a main part for describing a joint operation of the sleeve and the flange by the robot hand of FIG. 31;

FIG. 33 shows a second example of the developing sleeve manufacturing apparatus according to the present invention.
It is a side view which shows embodiment.

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

FIG. 35 is a plan view of the manufacturing apparatus shown in FIG. 33.

FIG. 36 is a schematic configuration diagram of the robot hand shown in FIG. 33.

FIG. 37 is a sectional view of the robot hand shown in FIG. 33;

FIG. 38 is a schematic configuration diagram of the cushion unit shown in FIG. 36.

FIG. 39 is an enlarged view of the high-frequency heating device shown in FIG. 33.

40 is a sectional view of the turntable shown in FIG.

FIG. 41 is a side view of the turntable shown in FIG. 33.

42 is a block diagram of a control system of the manufacturing apparatus shown in FIG. 33.

FIG. 43 is a side view of a flange and a sleeve connected by the manufacturing apparatus of FIG. 33;

FIG. 44 is an explanatory diagram of a cross-sectional shape of the sleeve shown in FIG. 43.

FIG. 45 is a flowchart illustrating an operation of the robot hand of the manufacturing apparatus shown in FIG. 33.

FIG. 46 is a flowchart for explaining the operation of the turntable of the manufacturing apparatus shown in FIG. 33.

FIG. 47 is a sectional view of a sleeve and a flange connected by the manufacturing apparatus of FIG. 33;

FIG. 48 is a view for explaining the relationship between the heating time and the temperature of the sleeve by the manufacturing apparatus of FIG. 33;

FIG. 49 is a view for explaining the relationship between the temperature of the sleeve heated by the manufacturing apparatus of FIG. 33 and the amount of expansion.

50 is an enlarged view of a main part for describing a coupling operation of a sleeve and a flange by the manufacturing apparatus of FIG. 33.

FIG. 51 is a sectional view of a developing sleeve that can be manufactured by the manufacturing apparatus of FIG. 33;

FIG. 52 is a cross-sectional view of a main part for describing a heating operation state according to a second example of the developing sleeve manufacturing apparatus of the second embodiment.

FIG. 53 is a cross-sectional view of a robot hand in a second example of the developing sleeve manufacturing apparatus.

FIG. 54 is an enlarged view of a main part for describing a joint operation of the sleeve and the flange by the robot hand of FIG. 53;

FIG. 55 is an explanatory diagram of a measurement position on the developing sleeve.

FIG. 56 is a diagram showing a power supply time and a power supply time for heating the end portion to 200 ° C. when the diameter of the sleeve changes.

FIG. 57 is a side view for explaining a blast processing operation for the developing sleeve.

FIG. 58 is a side view for describing a coating operation on the developing sleeve.

FIG. 59 is a view illustrating the method of manufacturing the developing sleeve.

FIG. 60 is a cross-sectional view of a main part for describing another example of the method of manufacturing the developing sleeve.

FIG. 61 is a cross-sectional view of a main part for describing still another example of a still further different method of manufacturing the developing sleeve.

FIG. 62 is a diagram showing evaluations of developing sleeves in sixth to ninth examples and a comparative example.

FIG. 63 is a cross-sectional view for explaining another configuration example of the developing sleeve.

FIG. 64 is a cross-sectional view illustrating still another configuration example of the developing sleeve.

FIG. 65 is a cross-sectional view illustrating still another configuration example of the developing sleeve.

FIG. 66 is a cross-sectional view for explaining still another configuration example of the developing sleeve.

FIG. 67 is a cross-sectional view illustrating still another configuration example of the developing sleeve.

FIG. 68 is a sectional view of the photosensitive drum unit in the axial direction.

FIG. 69 is a sectional view of the photosensitive drum unit in the axial direction.

FIG. 70 is a block diagram of a control system of the manufacturing apparatus according to the third embodiment.

FIG. 71 is a flowchart illustrating the operation of the robot hand of the manufacturing apparatus according to the third embodiment.

FIG. 72 is a flowchart for explaining the operation of the turntable of the manufacturing apparatus according to the third embodiment.

FIG. 73 is an enlarged view of a main part for describing an operation of connecting a sleeve and a flange by the manufacturing apparatus according to the third embodiment.

FIG. 74 is a diagram showing a change in the diameter of the fitting portion of the sleeve depending on the temperature.

FIG. 75 is a diagram showing a change in the diameter of the fitting portion of the sleeve depending on the temperature.

FIG. 76 is a diagram showing a state of the circularity of the sleeve.

FIG. 77 is a cross-sectional view illustrating an example of a conventional developing sleeve.

FIG. 78 is a cross-sectional view for explaining a rotation state of a conventional developing sleeve.

FIG. 79 is an explanatory diagram showing the relationship between the distance between the developing sleeve and the magnet roller inside the developing sleeve and the toner suction force of the magnet roller.

FIG. 80 is a view showing a state in which the bulging portion of the sleeve is displaced from the drum contact surface of the sleeve roller.

FIG. 81 is a view showing the relationship between the thickness of the sleeve and the heat radiation state.

[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)

Claims (18)

[Claims] 1. A method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inside of the end portion of the cylindrical member and the flange member is closed. A processing step of processing to a size that is a relationship of shrinkage, and heating the end of the cylindrical member to a predetermined temperature to expand the diameter,
A heating step of setting the inside of the end of the cylindrical member and the joint of the flange member to have a clearance fit, an inserting step of inserting the joint of the flange member inside the end of the cylindrical member, A coupling step of pressing the flange member in a direction in which the cylindrical member is inserted into the cylindrical member during the cooling of the cylindrical member, and coupling the cylindrical member to the cylindrical member at a coupling portion between the cylindrical member and the flange member. A method for manufacturing a cylindrical body, characterized by controlling a bulge position of an outer shape of a cylindrical body. 2. The method for manufacturing a cylindrical body according to claim 1, wherein the outer bulge position of the cylindrical member is controlled by shifting the position of the connecting portion of the flange member. 3. The method according to claim 1, wherein the heating of the cylindrical member is performed by high-frequency induction heating. 4. The method according to claim 1, wherein the cylindrical member is a phenomenon sleeve used in an image forming apparatus. 5. The method according to claim 1, wherein the cylindrical member is a photosensitive drum used in an image forming apparatus. 6. A method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inside of the end portion of the cylindrical member and the flange member is closed. A processing step of processing into a size having a relationship of shrinkage, heating the end of the cylindrical member to a first predetermined temperature to expand the diameter, and connecting the inside of the end of the cylindrical member and the joint of the flange member. A heating step having a relationship with a clearance fit, an insertion step of inserting a coupling portion of the flange member inside an end of the cylindrical member, and a second predetermined temperature during cooling of the cylindrical member. And a holding release step of releasing holding of the holding means for holding the flange member when the above condition is satisfied. 7. A method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inner side of the end portion of the cylindrical member and the flange member is closed. A processing step of processing into a size having a relationship of shrinkage, heating the end of the cylindrical member to a first predetermined temperature to expand the diameter, and connecting the inside of the end of the cylindrical member and the joint of the flange member. A heating step having a relationship with a clearance fit, an insertion step of inserting a coupling portion of the flange member inside an end of the cylindrical member, and a second predetermined temperature during cooling of the cylindrical member. And a grip releasing step of releasing the gripping of the gripping means for gripping the flange member. 8. The method according to claim 7, wherein the second predetermined temperature is equal to or lower than a temperature at which the cylindrical member and the flange member change from a clearance fit to a tight fit. Manufacturing method of cylindrical body. 9. A method for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein a connecting portion between the inner end portion of the cylindrical member and the flange member is formed. A processing step of processing to a size that is a relationship of tight fit, and heating the end of the cylindrical member to a predetermined temperature to expand the diameter,
A heating step in which the inside of the end of the cylindrical member and the joint of the flange member are in a clearance relationship with each other, and the inside of the end of the cylindrical member is inserted with the joint of the flange member, and An insertion step of bringing a holding means for holding into contact with an end of the cylindrical member; and a holding release for releasing the holding of the holding means when the cylindrical member reaches a predetermined temperature during cooling of the cylindrical member. And a process for producing a cylindrical body. 10. A method of manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inner end portion of the cylindrical member and the flange member is formed. A processing step of processing to a size that is a relationship of tight fit, and heating the end of the cylindrical member to a predetermined temperature to expand the diameter,
A heating step in which the inside of the end of the cylindrical member and the joint of the flange member are in a clearance relationship with each other, and the inside of the end of the cylindrical member is inserted with the joint of the flange member, and the flange member is inserted. An insertion step of bringing a suction unit for suction into contact with an end of the cylindrical member; and a suction release for releasing suction of the suction unit when the cylindrical member reaches a predetermined temperature during cooling of the cylindrical member. And a process for producing a cylindrical body. 11. A cylindrical body manufacturing apparatus for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inner side end of the cylindrical member and the flange member is formed. Heating the end of the cylindrical member that has been processed to the size of the interference fit to a first predetermined temperature, to form a clearance between the inside of the end of the cylindrical member and the joint of the flange member. Heating means for expanding the diameter so as to be related to each other; insertion means for inserting a coupling portion of the flange member inside an end portion of the cylindrical member; and gripping means for gripping the flange member. ,
Gripping means for releasing the gripping of the flange member when the cylindrical member reaches a second predetermined temperature during cooling of the cylindrical member; and wherein the cylindrical member has reached the first and second predetermined temperatures. An apparatus for producing a cylindrical body, comprising: a temperature detecting means for detecting the above. 12. The apparatus according to claim 11, wherein the heating unit is a high-frequency induction heating device. 13. The apparatus according to claim 11, wherein the temperature measuring means is a heat radiation thermometer. 14. The image forming apparatus according to claim 11, wherein the cylindrical member is a developing sleeve used in an image forming apparatus.
3. The apparatus for manufacturing a cylindrical body according to claim 1. 15. The apparatus according to claim 11, wherein the cylindrical member is a photosensitive drum used in an image forming apparatus. 16. A method for manufacturing a cylindrical body in which a connecting portion of a flange member is fitted inside an end portion of a cylindrical member, wherein the connecting portion between the inside of the end portion of the cylindrical member and the flange member is closed. A processing step of processing to a size that is a relationship of shrinkage, and heating the end of the cylindrical member to a predetermined temperature to expand the diameter,
A heating step in which the inside of the end of the cylindrical member and the joint of the flange member are in a clearance relationship with each other, and an insertion step of inserting the joint of the flange member inside the end of the cylindrical member, A coupling step of pressing the flange member in the direction of insertion into the cylindrical member during the cooling of the cylindrical member, and coupling the flange member to the cylindrical member at the same time as the completion of the heating in the heating step. A method for producing a cylindrical body, wherein the insertion is terminated. 17. The method according to claim 16, wherein the cylindrical member is a developing sleeve used in an image forming apparatus. 18. The method according to claim 16, wherein the cylindrical member is a photosensitive drum used in an image forming apparatus.