JPH091266A - Manufacture of cylindrical body and manufacturing apparatus - Google Patents

Abstract

PURPOSE: To provide a manufacturing method of a cylindrical body by which the productivity can be improved by eliminating a process for returning back to the room temp. in the interval between a drying process and a heating process. CONSTITUTION: This manufacturing method is provided with a working process for working the inside in the end part of the cylindrical member W2 and the connecting part of a flange member W1 into the size to be subjected to interference fit, a preheating process for preheating the cylindrical member and holding the member at a fixed high temp., an expanding diameter process for applying the interference fit to the inside in the end part of the cylindrical member W2 and the connecting part of the flange member W1 by heating the end part of the cylindrical member W2 to a prescribed temp. to expand the diameter, and an inserting process for inserting the connecting part of the flange member W1 into the inside in the end part of the cylindrical member during cooling the end part of the cylindrical member W2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method and a manufacturing apparatus for 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, the surface of an electrophotographic photosensitive drum or developing sleeve in an image forming apparatus such as an electrophotographic copying machine, a laser beam printer, a facsimile, or a printing machine is finished to have a predetermined surface roughness. A cylindrical member is used.

A photosensitive drum for electrophotography is manufactured by applying a photosensitive film to the surface of a drum substrate finished to a predetermined surface roughness. However, if the surface accuracy or dimensional accuracy of the drum substrate is low, the photosensitive film becomes uneven. Occurs, which 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 substrate is required to be processed to have a predetermined surface roughness, and the straightness and the roundness also need to be extremely high. Become.

Further, in order to carry a latent image on a latent image carrier formed by, for example, electrophotography or electrostatic recording, a developing solution is carried on the latent image carrier on which the latent image is formed. The developing sleeve that is conveyed by one-component, two-component developer, magnetic,
In order to faithfully visualize the latent image by carrying these developers regardless of whether they are non-magnetic developers or insulating and dielectric developers, the surface roughness, straightness and shake prevention are extremely high. Precision is required.

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 ~ 1.5% Mu, or Si-Mg-Al alloy containing 0.20-0.60% Si and 0.45-0.90 Mg is used. These materials are subjected to extrusion and drawing steps to a certain degree of dimensional accuracy. However, since a large amount of bending remains in such an aluminum drawn cylinder, usually, after that, roll correction or the like is performed to finish up to desired dimensional accuracy (straightness, runout). After that, it is cut into a predetermined length, and the ends are finished by cutting for the purpose of removing the burrs on both ends and improving the end surface accuracy.

For example, in the case of a developing sleeve, the surface of the cylinder thus formed is subjected to sandblasting or the like so that the base cylinder thus formed has a function as a developing sleeve, and irregularities are formed on the surface to convey the developer (toner). For the purpose of improving the chargeability of the toner,
Apply a coating of thermosetting resin with conductive carbon dispersed on the surface with irregularities by spray coating,
There is known a method of curing the coating film by drying it with constant temperature soda at ℃ to 170 ℃ for 20 to 30 minutes.

Finally, flange members for rotatably supporting the developing sleeve are joined to both ends of the thus formed cylindrical member by a shrink fit joining method. Further, depending on the type of developer (toner) used, a magnet roller for magnetically transporting the toner may be inserted inside the cylinder. This is the case when the toner is a magnetic toner. In this way, the flange member is shrink-fitted to both ends of the cylindrical member to complete the development sleeve.

[0008]

However, in the above-mentioned conventional example, in the step of shrink-fitting and joining the cylindrical member and the flange member at the time of manufacturing the developing sleeve, the end portion of the sleeve which is kept at a constant temperature at a constant temperature is fixed. The temperature was raised to a predetermined temperature under the high-frequency induction heating conditions. In the pre-process of the shrink-fitting process, a process for forming a coat layer on the sleeve surface and a process for drying the coat layer (150 to 170 ° C., 20
~ 30 minutes, 25 pallets). Therefore, for the sleeve that has undergone the drying process, for example,
Since the fifth one has a variation of about 40 ° C., it was cooled to room temperature by natural cooling (or air cooling) and then put into the shrink fitting process.

From the above, the sleeve which has been once heated to normal temperature and then the temperature is increased again at the time of joining, and there is a wasteful step to raise the temperature to a predetermined temperature in order to raise the temperature to a predetermined temperature. It was hanging.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to improve the productivity by omitting the step of returning the temperature to room temperature between the drying step and the heating step. An object of the present invention is to provide a method and an apparatus for manufacturing a cylindrical body.

[0011]

In order to solve the above-mentioned problems and to achieve the object, in the method of manufacturing a cylindrical body according to the present invention, the coupling portion of the flange member is fitted inside the end portion of the cylindrical member. A method of manufacturing a cylindrical body for manufacturing a cylindrical body, comprising: a processing step of processing a coupling portion between the inner end of the cylindrical member and the flange member into a size having a tight fit relationship; and preheating the cylindrical member. Then, in a preheating step of maintaining a constant high temperature, the end portion of the cylindrical member is heated to a predetermined temperature to expand its diameter, and a clearance fit between the inner end portion of the cylindrical member and the joint portion of the flange member is performed. It is characterized by comprising a related diameter expansion step and a fitting step of fitting the joint portion of the flange member inside the end portion of the cylindrical member while cooling the end portion of the cylindrical member.

Further, the cylindrical body manufacturing apparatus according to the present invention is a cylindrical body manufacturing apparatus for manufacturing a cylindrical body in which a joint portion of a flange member is fitted inside an end portion of the cylindrical member. The end of the cylindrical member, which is processed to have a tight fit with respect to the end of the cylindrical member, is heated to a predetermined temperature, and the end of the cylindrical member has a clearance with respect to the joint of the flange member. By means of heating means for expanding the diameter so as to be in a relation of: and fitting means for fitting the joint portion of the flange member inside the end portion of the cylindrical member while cooling the end portion of the cylindrical member; A preheating means for preheating the cylindrical member to maintain it at a constant high temperature before heating is provided.

Further, in the apparatus for producing a cylindrical body according to the present invention, the preheating means is an atmosphere furnace using a cartridge heater.

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

[0016]

In the present invention configured as described above, by providing the step of preheating the cylindrical member before the diameter expanding step, the step of lowering the temperature of the cylindrical member that has undergone the drying step can be omitted. In addition, in the diameter expansion step, the heating time for raising the end portion of the cylindrical member to a predetermined temperature can be shortened and the power consumption of the heating device can be saved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the embodiments of the present invention, the background art and outline of the present invention will be described below.

(Background Art and Outline) In connection with the cylindrical member and the flange member, various methods have been tried so far with high accuracy without bending the flange member. For example, in Japanese Utility Model Publication No. 56-154007,
A roll in which a plurality of holes are provided on the outer periphery of the fitting portion of the flange member and the cylindrical member is caulked and joined is disclosed. Japanese Utility Model Laid-Open No. 57-79862 discloses an annular groove at the end portion of the flange member. There is disclosed a roll which is provided and crimped so that the end of the cylindrical member is wound therein, and further disclosed in JP-A-6-1755.
Japanese Patent Publication No. 04 discloses a roll in which a cylindrical member is spigot-processed, a flange member having a fitting portion smaller than the spigot inner diameter is inserted, and bonded by an adhesive.

However, in these methods, although the coupling strength of the flange member can be obtained by crimping, eccentricity occurs due to the external pressure for crimping, and it is difficult to obtain a cylindrical body without bending of the flange member. Further, in the bonding method by adhesion, it is difficult to uniformly apply the adhesive to fix the flange member so that there is little bending, and in some cases, the adhesive strength may decrease due to aging,
The joint strength of the flange member and the joint with less bending of the flange member cannot be simultaneously obtained.

As a result of intensive studies to solve such a problem, it was found that a so-called shrink fit is effective in which a joint portion of a cylindrical member is expanded in diameter by heating and a flange member is loosely fitted and joined to the portion. It was

However, even if the cylindrical member and the flange member are just shrink-fitted in this manner, the bonding strength can be obtained, but the bonding with less bending cannot be obtained.
It is for the following reasons.

That is, in general, the heat conductivity of metal is large, and when the flange member comes into contact with the inner surface of the cylindrical member, heat is rapidly transferred and the cylindrical member returns to its original size.
At this time, the flange member is inserted while being displaced from the central axis of the cylindrical member or bent. In order to solve such a problem, it is necessary to promptly adjust the horizontal displacement of the central axes of the cylindrical member and the flange member, and further surely press the end surface of the cylindrical member and the facing portion of the flange member in contact with each other. Is important.

Generally, the developing sleeve as a cylinder is
A magnet roller is inserted into the latent image carrier to develop the latent image formed by the electrophotographic method or the electrostatic recording method. This is because the developer is conveyed by magnetic force, and the thickness of the cylindrical member in the developing sleeve is 0.5 mm to 1.1 due to the magnetic force of the magnet roller.
The range is 5 mm. Further, the flange member in the developing sleeve needs to have a bonding strength of 5 kg to 50 kg, and it has been found that the following dimensions are effective from this point.

That is, the joint interference is 0.
A range of 04 to 0.2% is required. The bond length is
The range is 1 mm to 5 mm from the viewpoint of preventing the flange member from collapsing after coupling and ensuring the coupling strength. If the joint interference is 0.04% or less of the reference inner diameter, the required joint strength cannot be obtained, and if the joint interference is 0.2% or more of the reference inner diameter, the strength is more than necessary. If the coupling length is 1 mm or less, the flange portion after coupling may fall, and it is unnecessary to set it to 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, and when it is 0.3% or less, the flange member is bent and joined due to 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 deteriorated.

Further, in order to obtain a good image using the developing sleeve, it is preferable that the deflection of the flange member is 15 μm or less. By setting the precision to 15 μm or less, it is possible to suppress the occurrence of runout of the entire developing sleeve in the connection with the means for rotationally driving the developing sleeve. In order to obtain such accuracy, it is necessary to set the inlay of the connecting portion of the cylindrical member to 10 μm or less and the perpendicularity of the end face to 5 μm or less. Further, it is necessary that the runout of the single flange member is 5 μm or less. Due to the bonding condition, the runout of the flange member is 15 μm or less.

Further, the cylindrical body such as the developing flange and the photosensitive drum is to obtain a preferable bonding strength in all environments such as high temperature and high humidity, low temperature and low humidity, in consideration of environmental conditions of a copying machine and a printer provided with the cylindrical body. In addition, it is preferable that 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 drawback that it is easily deformed by heat under high temperature conditions. Therefore, the expansion range of the aluminum cylindrical member is 0.3 to 0.5% of the reference inner diameter.
Therefore, it is necessary to suppress the heating temperature.

In the developing sleeve, one of the two flange members joined to both ends of the cylindrical member is a plastic flange, and the flange is easily joined by means such as press fitting, caulking, and adhesion. But,
In developing sleeves for copying machines and printers, which require durability, it is necessary to accurately connect flange members to both ends of a cylindrical member. In such a case, a magnet roller is provided inside the cylindrical member. It is necessary to connect the flange members in the housed state. In this case, one flange member is joined to one end of the cylindrical member, and the other end of the cylindrical member and the other flange member are processed simultaneously or separately by cutting or centerless cutting to form a cylindrical member with good coaxiality. After preparation, the magnet roller is inserted into the cylindrical member, and the other flange member is joined to the other end of the cylindrical member. When the flange member is joined to the cylindrical member in the presence of the magnet roller in the cylindrical member, the heating temperature of the cylindrical member is increased to avoid fluctuation of the magnetic force of the magnet roller due to heating for expanding the diameter of the cylindrical member. Need to be suppressed. If there is a change in the magnetic force on the magnet roller, the image deteriorates. Due to this necessity, the expanded diameter range of the cylindrical member is set to 0.3 to 0.5% of the reference inner diameter.
And Further, by setting the heating temperature to 200 ° C. or lower, the change in the magnetic force of the magnet roller can be suppressed.

Next, an embodiment of the present invention will be described with reference to the "overall structure of the image forming apparatus", "developing sleeve manufacturing apparatus", "specific example of developing sleeve manufacturing method", "developing sleeve structural example", and "developing sleeve structural example". A specific example of a method for manufacturing a photosensitive drum ”will be described separately.

[Image Forming Apparatus] FIG. 35 shows a schematic structure of a transfer type electrophotographic apparatus provided with a developing sleeve as a cylindrical member and a photosensitive drum.

In FIG. 35, reference numeral 1101 denotes a photosensitive drum, which is rotationally driven around the shaft 1101a in the arrow direction 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 the developing means 1104.
The toner development is performed by the transfer unit 110.
5, the transfer material P is sequentially transferred from the sheet feeding unit (not shown) to the surface of the transfer material P that is 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 included in the developing unit 1104. The transfer material P having received the image transfer is
The image is separated from the surface 01, is introduced into the image fixing unit 1108, undergoes image fixing, and is printed out as a copy.

The surface of the photosensitive drum 1101 after the image transfer is
The cleaning unit 1106 removes the residual toner after transfer to obtain a clean surface, and the pre-exposure unit 1107 removes the charge to repeatedly use the image.

Uniform charging means 110 for the photosensitive drum 1101
For 2, a corona charging device or contact charging is generally widely used. Also, as the transfer means 1105, a corona charging transfer means 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
A unit integrally supported with 101 may be a detachable single unit (developing device) in the apparatus main body, and may be detachable by using a guide means such as a rail of the apparatus main body.

Further, when the electrophotographic apparatus is used as a copying machine or a printer, the light image exposure L is reflected light or transmitted light from an original, or the original is read and converted into a signal, and a laser beam is scanned by this signal. , Driving the LED array,
Alternatively, it is performed by driving a liquid crystal shutter array or the like.

When used as a facsimile printer, the light image exposure L is an exposure for printing the received data. FIG. 36 is a block diagram showing a configuration example in this case.

In FIG. 36, the controller 1111
Controls the image reading unit 1110 and the printer 1119. The entire controller 1111 is controlled by the CPU 1117. The read data from the image reading unit 1110 is transmitted to the partner station via the transmission circuit 1113. The data received from the partner station is sent to the printer 1119 through the receiving circuit 1112. Image memory 111
6 stores predetermined image data. A printer controller 1118 controls the printer 1119. 11
14 is a telephone.

Image received from line 1115 (line 1
(Image information from a remote terminal connected via 115) is demodulated by the receiving circuit 1112, and then the CPU 111
Reference numeral 7 sequentially performs image information decoding processing and sequentially performs image memory 111.
6 is stored. When the image for at least one page is stored in the memory 1116, the image recording for that page is performed. The CPU 1117 reads out image information for one page from the memory 1116, and the printer controller 11
The decoded image information for one page is sent to 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.
The CPU 1117 is receiving the next page during recording by the printer 1119.

Images are received and recorded as described above.

By the way, the developing means 1104 supplies the developer to the electrostatic latent image on the photosensitive drum 1101 by the rotation of the developing sleeve 1020 and develops the electrostatic latent image. In order to favorably supply the developing sleeve 1020 to the photosensitive drum 1101,
It is necessary to face each other at a predetermined interval.

FIG. 37 is a perspective view showing the positional relationship between the developing sleeve 1020 and the photosensitive drum 1101, and FIG. 38 is a sectional view of the non-driving side end of the developing sleeve 1020.

As shown in FIG. 37, the developing sleeve 102
0 means that the flange members 1022 at both ends thereof are sliding bearings 1
It is rotatably supported by 023. Further, 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 at both ends of the developing sleeve 1020. The spacer roller 1021 is made of a resin material having good slidability, and its outer diameter is the developing sleeve 10.
It is set to be larger than the outer diameter of 20 by twice the spacing δ (2δ). Therefore, as shown in FIG. 38, the distance δ between the surface of the photosensitive drum 1101 and the surface of the developing sleeve 1020 is kept constant by printing the spacer rollers 1021 on the peripheral surface of the photosensitive drum 1101.

FIG. 39 is a side view of the developing means 1104, and FIG.
Reference numeral 0 is a cross-sectional view of the end portion of the developing sleeve 1020 on the drive shaft side.

39 and 40, a drive gear 1017 is attached to the flange member 1022 on the drive shaft side, and the drive gear 1018 on the drive shaft 1019 side of the apparatus main body is selective to the drive gear 1017. The developing sleeve 1020 is rotationally driven by engaging with.

FIG. 41 is a cross-sectional view of a case in which the magnet roller 1025 is provided in the developing sleeve 1020. The developing sleeve 1020 is rotationally driven in the direction of arrow A outside the magnet roller 1025 held in a stopped state.
Further, the photosensitive drum 1101 rotates in the direction of arrow B.

[Development Sleeve Manufacturing Apparatus] (First Embodiment) FIG. 1 is a side view of a developing sleeve manufacturing apparatus as a cylindrical body, FIG. 2 is a front view of the manufacturing apparatus, and FIG.
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 highly accurately processed flange W1, and 4 is an end of a highly accurately processed sleeve W2. The high frequency heating device 5 for heating is provided with a sleeve W from a conveyor line (not shown).
2 is a turntable for loading and unloading 2.

FIG. 4 shows a schematic structure 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. 5 is a sectional view of the entire robot hand 2,
FIG. 6 is an enlarged cross-sectional view of the lower portion of the robot hand 2.

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

Reference numeral 11 is a lock cylinder, 12 is a lock plate, and the horizontal compliance 10 is formed between them. The lock plate 12 has a horizontal compliance 10
Of the horizontal table 10B. Lock cylinder 11
When the pressurized air is supplied through a solenoid valve (not shown), the cylinder rod 13 is projected downward and the tip thereof is fitted into the lock hole 14 of the lock plate 12, so that the lock plate 12, that is, Horizontal compliance 10
Is fixed. Therefore, during 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.

A parallel hand 15 is provided with a pawl 16 for gripping the flange W1. 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.

Further, the parallel hand fixing member 17 has a structure shown in FIG.
As shown in, a pressing support member 23 for inserting and pressing the flange W1 into the sleeve W2 is attached. A screw ball 24 having a rotatable ball 24A is attached to the support member 23. The mounting position of the screw ball 24 substantially coincides with the center of the parallel hand 5, and when the parallel hand 15 grips the flange W1, it coincides with the axis of the hollow hole 25 of the flange W1.

1 to 3, the stocker 3 is a device for supplying the flange W1 to the robot 1, and accommodates the pallets 120 shown in FIG. Are stored in a matrix. The pallet 120 emptied by supplying the flange W1 to the robot 1 is automatically discharged, and instead, a new pallet 120 with the flange W1 spread is set at the supply position.

FIG. 8 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. 8C), an induced current I2 is generated in the sleeve W2, and the sleeve W2 self-heats. Also, the current I1
9 and FIG. 10 which have versatility when the wall thickness of the sleeve W2 is changed by changing the frequency of the above, it is possible to change the heating state from the surface of the sleeve W2 located inside the coil 113 to the center direction. Is the turntable 5
FIG.

In these figures, 100 is a base plate,
Reference numeral 101 is a vertically moving cylinder, 102 is a guide block, and the guide block 102 has a built-in linear bush 103 that guides a guide rod 104 slidably in the vertical 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 rod 104, and is vertically moved by the vertically moving cylinder 101 with high accuracy. 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 accurately transmitted to the turntable 109.

A sleeve W is provided on the turntable 109.
2 has a V-shaped cross-section receiver 111 (FIG. 3).
And a rotary cylinder 112 for pressing and fixing the sleeve W2 on the receiver 111, and according to the operation of the rotary cylinder 112, the sleeve W2 can be positioned and held and taken out.

Further, in FIG. 10, reference numeral 113 denotes a coil of the high-frequency heating device 4 described above, and the sleeve W2 positioned and held by the receiver 111 and the rotary cylinder 112 is moved up and down by the vertical movement cylinder 101 together with the turntable base 109. By doing so, the upper end of the sleeve W2 is positioned inside the coil 113. In FIG. 9, reference numeral 114 denotes a magnetic plate made of iron or the like, and when the flange W1 is joined after inserting the magnet roller W3 into the sleeve W2 as described later, the magnet roller W3 is biased in the sleeve W2 for positioning. To do.

The turntable base 109 is rotationally driven by the high rotor 106, and the turntable base 1
The stopper 115 (see FIG. 10) attached to the 09 contacts the shock absorber 116 (see FIG. 10), whereby the position of the turntable base 109 in the rotational direction is regulated.

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

In FIG. 11, reference numeral 50 is a central processing unit (CPU), and 52 is a non-volatile memory (ROM) containing a series of control algorithm programs and a man-machine interface program, which is bus-coupled to the CPU 50. is there. Reference numeral 54 denotes a power-backed-up memory (RAM) capable of storing teaching data. 5
A counter 6 is connected to an encoder 60 connected to a servo motor 58 that drives the robot 1, and counts to detect the current position of the servo motor 58. 6
A D / A converter 2 is 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 fetching information of the other control device 68 such as the high frequency heating device 4 and the like, the solenoid valve 70, the sensor 72 and the like into the CPU 50. 74 is
It is a communication interface connecting the external teaching device 76, the display device 78, the input keyboard 80, and the CPU 50. Further, the ROM 52, the RAM 54, the counter 5
6, the converter 62 and the interfaces 66 and 74 are connected to the CPU 50 by a bus 82.

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

In the flange W1, the connecting portion 131, which is connected to the processing hole 130 at the end portion of the sleeve W2, and the convex portion 134 at the tip end are processed so as to have highly accurate roundness and coaxiality, respectively. Has been done. Further, the outer peripheral portion 133 that comes into contact with the end surface 132 of the sleeve W2 is processed so as to form a highly accurate squareness with respect to the coupling portion 131. Inner diameter processing is applied to the end of the sleeve W2, and the inner diameter processing hole 1
The coaxiality of the outer shapes of the sleeve 30 and the sleeve W2 is set with high accuracy, and there is no unevenness in wall thickness as shown in FIG. 13 (b), and the wall thickness is uniform as shown in FIG. 13 (a). . Further, the inner diameter processed hole 130 and the end surface 132 of the sleeve W2 are processed so as to form a highly accurate perpendicularity.

Therefore, the flange W1 and the sleeve W2 are joined together without galling the processed surfaces, 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 connecting operation of the flange W1 and the sleeve W2 will be described.

FIG. 14 is a flow chart for explaining the operation on the robot 1 side, and FIG. 15 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 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 rotary cylinder 112 operates to press and position the sleeve W2 against the V-shaped receiver 111 (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
Comes into contact with the shock absorber 116. When these abut, the sleeve W2 is located below the coil 113. After that, the vertical movement cylinder 101 is turned on,
Turntable base 109, high rotor block 10
7 and the like are raised, and the upper end of the sleeve W2 is positioned inside the coil 113 as shown in FIG. 16 (step SB).
3). After waiting for such positioning of the sleeve W2, a drive signal is sent to the high-frequency heating device 4, and the coil 113 is energized to start heating. Thereby, as described above, the opening portion 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.

In FIG. 17, the upper end of the sleeve W2 is at time t.
1 shows the temperature change when heated from 1, and FIG.
The relationship between the temperature of the sleeve W2 and the expansion amount is shown.

Due to the expansion of the inner diameter processed hole 130 of the sleeve W2, the connecting portion 1 between the inner diameter processed hole 130 and the flange W1 is formed.
31 changes from a tight fit relationship to a clearance fit relationship,
As described below, the connecting portion 131 is connected to the inner diameter processed hole 130.
Can be inserted into the gap.

After heating the sleeve W2, the coil 11 is
The power supply to 3 is stopped, and the high-frequency heating device 4 moves from the robot 1 to the robot 1.
A heating end signal is sent to the robot hand 2 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, when the flanges W1 are inserted into the sleeve W2 when they are misaligned, if the deviation is within the chamfering amount, they are absorbed by the horizontal compliance 10 and the flanges W1. The connecting portion 131 of the inside of the sleeve W2 smoothly forms the inner diameter processing hole 13 of the sleeve W2.
Inserted in 0. Further, when the insertion of the flange W1 is started, as shown in FIG.
8 fixes the taper piece 20 in the fitting hole 21, and after the flange W1 is inserted, as shown in FIG. 19 (b),
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 thereof is
The vertical force F1 and the horizontal force F2 are set with 4A as a fulcrum.

Further, the parallel hand lock release (step SA5) and parallel clamp release (step SA6) in the robot hand 2 cause the flange W1 to
The position is regulated by being pressed by the end surface 132 of the sleeve W2,
At the same time, the flange W1 at room temperature rapidly becomes the sleeve W.
The bonding ends when the temperature of the upper end of 2 is approached. In this way, highly accurate coupling according to the processing precision of the flange W1 and the sleeve W2 is performed.

After the completion of such coupling, the robot hand 2 is raised (step SA7), and the lock plate 12 and the parallel hand fixing member 17 are locked by the locking operation of the parallel hand lock cylinder 18. At the same time, an insertion end signal of the flange W1 is sent to the turntable 5, the turntable 5 is turned off by moving the vertical movement cylinder 101 OFF (step SB4), and the high rotor 106 is rotated to the discharge station of the sleeve W2 ( In step SB5), the rotary cylinder 112 is turned off and the sleeve W2 is released (step SB6).
The sleeve W2 is discharged (step SB7). On the other hand, the robot hand 2 locks the parallel 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, and it is possible to use, for example, a device that heats with a cartridge heater, a halogen lamp, a xenon lamp or the like.

Further, in the manufacturing apparatus for the phenomenon sleeve of the laser beam printer as in the present embodiment, in order to keep the concentricity of the flange W1 after coupling with the outer diameter of the sleeve W2 within 15 micrometers, The material of the sleeve W2 and the flange W1 may be any shrinkable metal such as Al or Fe. In addition to the developing sleeve of the laser beam printer, the present invention also requires an 8 mm VT which requires highly accurate assembly.
It can also be applied as an assembly of an R drum, a polygon mirror manufacturing apparatus, and the like.

(Second Embodiment) As shown in FIGS. 20 and 21, the manufacturing apparatus of the present embodiment is an apparatus for connecting a flange W1 to a sleeve W2 containing a magnet roller W3 by shrink fitting. The configuration is as follows.

When the flange W1 is coupled to the sleeve W2 containing the magnet roller W3 as in this example,
As shown in FIG. 20, the end portion of the magnet roller W3 penetrates the flange W1 and projects to the outside. Therefore, in the robot hand 2 of the above-described embodiment, the flange W1 cannot be directly pressed by the ball 24A. Therefore, in the present embodiment, instead of the above-described robot hand 2, a robot hand 2 ′ of FIG. 22 incorporating an angle absorbing mechanism is attached. Below, robot hand 2 '
With respect to, the points 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.

When the insertion of the flange W1 is started, 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
After inserting 1, the parallel hand lock cylinder 18 immediately performs an unlocking operation to allow relative displacement between the lock plate 12 and the parallel hand fixing member 17 as shown in FIG. The lock cylinder 152 performs the unlocking operation, and the parallel hand fixing member 17 and the suction head 1
51 and a relative displacement between them. Therefore, the flange W1 is coupled so as to follow the inner diameter processing hole 130 of the sleeve W2.

When the flange W1 is coupled, 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.

By the way, 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
(See FIG. 21) The end of the magnet roller W3 does not enter. Therefore, the magnetic material 1 installed on the turntable 5
14, the magnetic body 114 and the magnet roller W are used.
The magnet roller W3 is positioned on one side of the sleeve W2 by the attraction force between the magnet roller W3 and the magnet roller W3 in parallel with the sleeve W2. As a result, interference between the flange W1 and the magnet roller W3 is avoided, and the flange W1 can be inserted into the inner diameter processed hole 130 of the sleeve W2.

(Third Embodiment) Further, in the high-frequency heating device having a constant power capacity, the sleeve W
There is a limit to heating the temperature of 2 to a constant temperature. Therefore, in order to shorten the production tact, the sleeve W2 is preheated and kept at a certain high temperature state, so that the opening portion of the sleeve W2 is expanded in a state in which it can be joined by heating for a shorter time. You can

For example, the temperature of the sleeve W2 that has exited the drying furnace is kept constant until the sleeve W2 is supplied to the manufacturing apparatus shown in FIGS.
A high temperature atmosphere preheating method according to 01) is used to maintain a constant high temperature (FIGS. 42 and 43).

According to this, as shown in FIG. 44, if the temperature of the sleeve W2 coming out of the drying furnace is set to around 160 ° C., the system using the high temperature tank can perform temperature control as shown in FIG. 44a. it can. However, in a system that does not use a high temperature tank, the temperature of the sleeve W2 sharply decreases before being supplied to the heat-fitting device, as in b. In particular, when the sleeve W2 is made of a material such as Al that easily radiates heat and has a thin wall thickness, this temperature drop b is severe. These two processes a and b
When comparing the above, the heating time by the high-frequency heating device 4 to the predetermined temperature of the sleeve end portion is t1 <t2,
The system using the preheating device 500 can significantly reduce the production tact.

[Specific Example of Manufacturing Method of Developing Sleeve] (First Embodiment) In the developing sleeve of the present embodiment, after the flange is shrink-fitted to one end of the sleeve by the manufacturing apparatus of the first embodiment described above, It was manufactured by press-fitting another flange to the other end of the sleeve.

The sleeve W2 has an outer diameter of 12 mm and an inner diameter of 1
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 this way is shown in FIG.
As shown in (c), when the sleeve W2 was rotated while holding the positions A and B at both ends, the runout at the point a, that is, the inlay, was 8 μm, and the squareness of the end face was 3 μm. Then, this sleeve W2 was set in the manufacturing apparatus of the above-described first embodiment with the inner diameter processing hole 130 facing upward. On the other hand, the flange W1 has an outer diameter of the connecting portion 131 of 10.618 m.
m, and the length of the connecting portion 131 was 1.5 mm.

When coupling the flange W1 and the sleeve W2, the high-frequency heating device 4 heated a range of 5 mm from the upper end of the sleeve W2 to expand the inner diameter processing hole 130 of the sleeve W2 by 42 μm. Then, the flange W1 was inserted into and coupled to the sleeve W2.

As described above, with respect to the developing sleeve material in which the flange W1 is joined 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 shake is 10 μm
Met. Also, a force of 10 kg was required to forcibly pull out the flange W1 from the sleeve W2.

Further, such a developing sleeve material was subjected to sandblasting as shown in FIG. In FIG. 25, W is a developing sleeve material, 208 is a blast nozzle for ejecting abrasive grains 211, 210 is an upper and lower masking jig, and the abrasive grains 211 were sprayed while rotating the developing sleeve material W. The sandblasting conditions are shown below.

Abrasive grains; Alumina powder (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, a developing sleeve blasted in this way As shown in FIG. 26, the coating material 212 for improving the charge imparting property is sprayed from the spray 211 onto the material W to form a coat layer, and then the coating layer is dried in a drying oven at 150 ° C. for about 30 minutes.
The coating film was heat-cured for 1 minute. The paint 212 is 10 parts by weight of conductive carbon, graphite (average abrasive grain 7
90 parts by weight of μ) and 100 parts by weight of a phenol resin were mixed with a MEK solvent so as to have a solid content of 10%, put in a paint shaker together with glass beads, and dispersed for 5 hours for adjustment.

After that, as shown in FIG. 27, the magnet roller W3 is inserted into the developing sleeve material W in which the flange W1 is coupled only to one end side of the sleeve W2, and then the other end side of the sleeve W2. The developing sleeve was completed by press-fitting the flange W4 into. As described above, by incorporating the magnet roller W3 after the resin applied to the surface of the sleeve W2 is heat-cured, the change of the magnetic force curve and the heat deformation of the magnet roller W3 due to the heat at the time of the heat-curing are avoided.

The developing sleeve thus completed 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. It was

Instead of forming the unevenness by the blasting process of FIG. 25, the paint 212 is used in the painting process of 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 addition amount of spherical particles or the particle size of spherical particles. 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 the bending when the flange W1 is inserted, the sleeve W2 in which the magnet roller W3 is incorporated may be centerless or cut.

(Second Embodiment) A flange W is formed on one end of the sleeve W2 using the same material and method as those of the first embodiment.
1 was combined to form a developing sleeve material. The inlay and the end face perpendicularity were 7 μm and 4 μm, respectively. Then, the blast treatment and the coat layer for improving the charge imparting property were formed as in the first embodiment. However, the coating material for forming the coat layer was prepared by mixing 10 parts by weight of conductive carbon, 90 parts by weight of graphite (average abrasive grain 7 μm), PMMA spherical particles (average particle size 10 μm), and 100 parts by weight of phenol resin, It was adjusted with a paint shaker as in the first embodiment described above.

Thereafter, as in the above-described embodiment, the magnet roller W3 was inserted into the sleeve W2, and then the flange W4 was press-fitted to the other end of the sleeve W2 to complete the developing sleeve. The runout of the flange W4 is 10 μm
Met.

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

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

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1
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. The sleeve W2 cut in this way has a runout at point a when it is rotated while holding the positions A and B at both ends of the sleeve W2 as shown in FIG. Is 4μ
m.

Then, the sleeve W2 having the flange joined to one end is coated with the coating solution in the same manner as in the second embodiment described above.

After that, as shown in FIG. 28, the magnet roller W3 is inserted into the sleeve W2 by the manufacturing apparatus of the second embodiment described above, and while being positioned and held by the magnetic body 114, the inner diameter of the other end of the sleeve W2. Processed hole 130
The flange W1 was shrink fitted. The flange W1 has an outer diameter of the coupling portion 131 of 18.645 mm,
Has a length of 3.5 mm, and the inner diameter of the through hole through which the end of the magnet roller W3 penetrates is 10 mm. When coupling the flange W1 and the sleeve W2, the inner diameter processed hole 130 at the other end of the sleeve W2 is 75 μm by the high frequency heating device 4.
Expanded diameter. Then, the flange W1 was inserted into and coupled to the sleeve W2.

As described above, with respect to the developing sleeve material in which the flange W1 is connected to the 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 shake is 11 μm
Met. In addition, a force of 20 kg or more was required to forcibly pull out the flange W1 from the sleeve W2.

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

(Fourth Embodiment) The developing sleeve of this embodiment is similar to the third embodiment described above, except that the other end of the sleeve whose one end is connected to the flange is the same as that of the second embodiment. It was manufactured by shrink-fitting the flange with an apparatus.

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1
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. Inside the other end of the sleeve W2, as shown in FIG.
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.
On the other hand, as in the second embodiment described above, the coating liquid was applied.

Thereafter, after inserting the magnet roller W3 into the sleeve W2, the shaft portion at the other end of the magnet roller W3 has an inner diameter of 5.01 as shown in FIG. 29 (a).
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 with the bearing 150. In addition, the shaft portion on one end side of the magnet roller W3 is also pivotally supported. In the sleeve W2, the spigot portion coupled to the flange W1 has an inner diameter of 19.003 and a length of 2.5 mm, and was rotated while holding the positions A and B at both ends of the sleeve W2 as shown in FIG. 24 (c). At that time, the runout at point a, that is, the inlay, was 6 μm, and the squareness of the end face was 3 μm.

Then, such a sleeve W2 is set in the manufacturing apparatus of the second embodiment described above, and the sleeve W2 is set.
A flange W1 was shrink-fitted to the other end of the. That flange W
In No. 1, the outer diameter of the coupling portion 131 is 19.017 mm, the length thereof is 2.5 mm, and the inner diameter is 6 ± 0.2 mm. The other end of the sleeve W2 was expanded by 76 μm by the heating device 4.

In this way, the flange W is attached to the sleeve W2.
24A to the developing sleeve in which 1 is shrunk
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. Also, a force of 15 kg or more was required to forcibly pull out the flange W1 from the sleeve W2.

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

As the bearing 150, other than the sintered oil-impregnated bearing, polyacetal resin, heat-resistant engineering plastic, or the like can be used without any limitation.

(Embodiment 5) The developing sleeve of this embodiment is
Similar to the above-described fourth embodiment, the sleeve was manufactured by shrink-fitting the flange to the other end of the sleeve having the flange joined to one end by the manufacturing apparatus of the above-described second embodiment.

The sleeve W2 has an outer diameter of 20 mm and an inner diameter of 1
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. Inside the other end of the sleeve W2, as shown in FIG.
And the inner diameter is 18.903.
mm, the length was 5 mm, the inlay was 6 μm, and the perpendicularity of the end face was 4 μm. Then, the sleeve W2 having the flange joined to one end in this manner was coated with the coating liquid in the same manner as in the second embodiment described above.

Then, after inserting the magnet roller W3 into the sleeve W2, the shaft portion at the other end of the magnet roller W3 has an inner diameter of 5.01 as shown in FIG. 29 (b).
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 of f8 with the bearing 150. In addition, the shaft portion on one end side of the magnet roller W3 is also pivotally supported.

Then, such a sleeve W2 is set in the manufacturing apparatus of the second embodiment described above, and the sleeve W2 is set.
A flange W1 was shrink-fitted to the other end of the. That flange W
No. 1 has an outer diameter of the coupling portion 131 of 18.915 mm and 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 has the above-mentioned fourth portion.
The diameter was expanded by 76 μm by the heating device 4 as in the example.

In this way, the flange W is attached to the sleeve W2.
24A to the developing sleeve in which 1 is shrunk
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.

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

(Sixth, Seventh, and Eighth Embodiments) FIG. 46 shows data on the sixth, seventh, and eighth embodiments as developing sleeves. These examples are produced by changing the dimensions of the coupling interference etc. in the above-mentioned third example. In addition, Comparative Examples 1 to 5 were also manufactured and evaluated.

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

In Comparative Example 6, when the developing sleeve of the third embodiment described above was manufactured, the magnet roller W3 was replaced by the magnetic material 1.
The flange W1 was shrink-fitted without being positioned by 14. 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, the magnet roller W3 was replaced with the magnetic material 1 when the developing sleeve of the fourth embodiment was manufactured.
The flange W1 was shrink-fitted without being positioned by 14. 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 manufacturing the developing sleeve of the fifth embodiment. 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 embodiment) Outer diameter 20.0 mm, inner diameter 1
The inner diameter is 5.01 mm to 5.04 mm at one end of the SUS304 sleeve W2 having a length of 8.8 mm and a length of 321.4 mm.
29 is attached to the other end of the sleeve W2 after the flange provided with the sintered oil-impregnated bearing in the range of FIG.
As in (a), two steps of spigot processing were performed. afterwards,
The coating liquid was applied in the same manner as in the first embodiment described above. Next, after inserting the magnet roll W3 into the sleeve W2, it was held by a sintered oil-impregnated bearing. The bearing has an outer diameter of 5 mm, a dimensional tolerance of f8 with the inside of the other end of the sleeve W2, and an inner diameter in the range of 5.01 mm to 5.04 mm. The spigot portion at the other end of the sleeve W2 to which the flange W1 is coupled had an inner diameter of 19.003 mm, a length of 2.5 mm, a spigot deflection of 7 μm, and an end face perpendicularity of 4 μm.

Then, the other end of the sleeve W2 is heated to
The diameter was expanded by 76 μm, and the flange W1 was inserted and joined in the same manner as in the first embodiment described above. The flange 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 the connection between the flange W1 and the sleeve W2, the runout of the flange W1 was measured and found to be 11 μm, and 15 kg was required to forcibly pull out the flange W1.
The above pulling force was required. Further, as a result of using the developing sleeve thus manufactured in the same manner as in the above-mentioned first embodiment, a good image was obtained without problems such as pitch unevenness.

(Tenth Embodiment) A developing sleeve was manufactured in the same manner as in the fifth embodiment, except that the sleeve W2 of the fifth embodiment described above was changed from aluminum to SUS304.
As a result, the runout of the flange W1 was 10 μm and the pulling force was 20 kg.

[Structural Example of Developing Sleeve] FIGS. 30 to 34
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 the structure shown in FIG. 30, the bearing 160 is provided only on the driving side of the developing sleeve (on the side of the left flange W1). 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 the structure shown in FIG. 31A, bearings 160 are provided at both ends. The bearing 160 on the left side in the figure may be mounted inside the sleeve W2 in which the spigot is formed in two steps as shown in FIG. 31 (b). FIG.
No. 2 has a structure in which two bearings 160 are provided on the non-driving shaft side (the right side flange W1 side) of the developing sleeve. The one shown in FIG. 33 (a) has a structure in which the left flange W1 of the one shown in FIG. 31 is fitted in the sleeve W2, and the one shown in FIG. 33 (b) has a two-step inlay molding. The bearing 160 is attached to the inside of the left side of the sleeve W2. The structure shown in FIG. 34 has a structure in which the bearing 160 is mounted inside the left flange W1.

Each of the developing sleeves shown in FIGS. 31 to 34 can be manufactured by using the manufacturing apparatus of the first and second embodiments described above.

[Specific Example of Manufacturing Method of Photosensitive Drum] Outer Diameter 2
A cylindrical tube as an extruded / extracted aluminum alloy having a diameter of 8.5 mm, an inner diameter of 27.1 mm, and a length of 260.5 mm was used as a cylindrical member (hereinafter, referred to as a “sleeve”) of a photosensitive drum, and an inner diameter 26. A cutting process with a length of 900 mm and a length of 7 mm was performed. At this time, the inlay was 8 μm and the perpendicularity of the end face was 3 μm.

Next, an aqueous solution of segaine in ammonia (11.2 g of segaine, 1 g of 28% ammonia water, 222 m of water)
l) 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 and Brylal resin (trade name: S-REC 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.

Further, 1 part by weight of a hydrazone compound and 1 part by weight of a polysulfone resin (trade name; P1700; manufactured by Union Carbide Co.) and 6 parts by weight of monochlorobenzene were mixed and stirred and dissolved by 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.

Then, the flange W is attached to one end of the sleeve W2 by the manufacturing apparatus of the first embodiment described above.
Combined 1. The flange W1 has a joint diameter of 26.
913 mm, coupling length is 2.0 mm, sleeve W
A range of 3 mm from one end of 2 was heated by the heating device 4 to expand the diameter by 108 μm, and the flange W1 was inserted and joined.

Then, the runout of the flange W1 was measured in the same manner as in FIG. 24 described above, and the result 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.

The photosensitive drum thus produced 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.

The present invention can be applied to the modified or modified embodiment described above without departing from the spirit of the invention.

[0137]

As described above, according to the present invention,
By providing a step of preheating the cylindrical member before the diameter expanding step, it is possible to eliminate the step of lowering the temperature of the cylindrical member that has undergone the drying step, and in the diameter expanding step, the end portion of the cylindrical member is set to a predetermined position. The heating time for raising the temperature can be shortened and the power consumption of the heating device can be reduced.

[0138]

[Brief description of the drawings]

FIG. 1 is a first device for manufacturing a developing sleeve according to the present invention.
It is a side view which shows an Example.

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

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

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

5 is a cross-sectional view of the robot hand shown in FIG.

6 is an enlarged cross-sectional view of a tip portion of the robot hand shown in FIG.

FIG. 7 is a schematic configuration diagram of the cushion unit shown in FIG.

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

9 is a cross-sectional view of the turntable shown in FIG.

10 is a cross-sectional view of the turntable shown in FIG.

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

FIG. 12 is a side view of a flange and a sleeve which are combined by the manufacturing apparatus of FIG.

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

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

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

16 is a cross-sectional view of a sleeve and a flange combined by the manufacturing apparatus of FIG.

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

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

FIG. 19 is an enlarged view of a main part for explaining a coupling operation of the sleeve and the flange by the manufacturing apparatus of FIG.

20 is a cross-sectional view of a developing sleeve that can be manufactured by the manufacturing apparatus of FIG.

FIG. 21 is a cross-sectional view of a main part for explaining a heating operation state according to the second embodiment of the developing sleeve manufacturing apparatus according to the present invention.

FIG. 22 is a sectional view of the robot hand in the second embodiment of the developing sleeve manufacturing apparatus according to the present invention.

FIG. 23 is an enlarged view of a main part for explaining a coupling operation of the flange of the sleeve by the manufacturing apparatus of FIG. 22.

FIG. 24 is an explanatory diagram of measurement positions on the developing sleeve.

FIG. 25 is a side view for explaining a blasting operation on the developing sleeve.

FIG. 26 is a side view for explaining the coating processing operation on the developing sleeve.

FIG. 27 is a view for explaining the manufacturing method of the developing sleeve according to the present invention.

FIG. 28 is a cross-sectional view of a main part for explaining another example of the method for manufacturing the developing sleeve according to the present invention.

FIG. 29 is a cross-sectional view of a main part for explaining still another example of the manufacturing method of the developing sleeve according to the present invention.

FIG. 30 is a cross-sectional view for explaining another configuration example of the developing sleeve according to the present invention.

FIG. 31 is a sectional view for explaining still another configuration example of the developing sleeve according to the present invention.

FIG. 32 is a sectional view for explaining still another configuration example of the developing sleeve according to the present invention.

FIG. 33 is a sectional view for explaining still another configuration example of the developing sleeve according to the present invention.

FIG. 34 is a cross-sectional view for explaining still another configuration example of the developing sleeve according to the present invention.

FIG. 35 is a schematic configuration diagram of a main part of the image forming apparatus.

FIG. 36 is a block diagram of the image forming apparatus shown in FIG. 35.

37 is a perspective view of the image sleeve and the photosensitive drum shown in FIG.

38 is a cross-sectional view of the end portion of the image sleeve shown in FIG. 35.

39 is a side view of the drive mechanism of the image sleeve shown in FIG. 35. FIG.

40 is a cross-sectional view of the main parts of the drive mechanism for the image sleeve shown in FIG. 35.

41 is a side view for explaining the positional relationship between the image sleeve and the photosensitive drum shown in FIG. 35.

FIG. 42 is a diagram showing each order in the example of the present invention.

FIG. 43 is a view showing a preheating device.

FIG. 44 is a diagram showing changes in temperature of the sleeve with and without the preheating device.

FIG. 45 is a diagram showing measurement results of sixth to ninth examples and comparative examples.

[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 (5)

[Claims] 1. A method of manufacturing a cylindrical body, wherein a cylindrical body is manufactured by fitting a joint portion of a flange member inside an end portion of a cylindrical member, the joint portion between an inner end portion of the cylindrical member and the flange member. And a preheating step of preheating the cylindrical member and maintaining it at a constant high temperature, and heating the end portion of the cylindrical member to a predetermined temperature to expand the diameter. Let
A step of expanding the diameter of the end of the cylindrical member and the joint of the flange member in a clearance fit relationship, and the flange member inside the end of the cylindrical member during cooling of the end of the cylindrical member. And a fitting step of fitting the joint part of (1). 2. A cylindrical body manufacturing apparatus for manufacturing a cylindrical body in which a joint portion of a flange member is fitted inside an end portion of the cylindrical member, wherein the joint portion of the flange member has a tight fit relationship. Heating to heat the end of the cylindrical member processed to a predetermined temperature to a predetermined temperature and to expand the end of the cylindrical member into a clearance fit relationship with the joint of the flange member. Means, fitting means for fitting the coupling portion of the flange member inside the end portion of the cylindrical member during cooling of the end portion of the cylindrical member, and preheating the cylindrical member before heating by the heating means. And a preheating means for maintaining a constant high temperature. 3. The cylindrical body manufacturing apparatus according to claim 2, wherein the preheating means is an atmosphere furnace using a cartridge heater. 4. The apparatus for manufacturing a cylindrical body according to claim 2, wherein the cylindrical member is a developing sleeve used in an image forming apparatus. 5. The apparatus for manufacturing a cylindrical body according to claim 2, wherein the cylindrical member is a photosensitive drum used in an image forming apparatus.