JPH0950179A - Cylindrical member and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce deflection of cylindrical surface of a cylindrical member such as a developing sleeve. SOLUTION: The cylindrical body 1 as a main body of the developing sleeve or the like is provided with an inside diameter working opening 1b formed on the end part by applying an inside diameter working, to which a coupling part 2b of the flange member 2 is shrinkage-fitted. prior to the shrinkage fit, the eccentricity of the inside diameter working opening 1b of the cylindrical body 1 and the eccentricity of the coupling part 2b of the flange member 2 are measured with measuring devices 33 and 34, and by offsetting the eccentricity of the both while making the cylindrical body 1 and the flange member 2 relatively rotated so that respective peak of output of either party becomes the phase difference of 180 degree, the deflection of such as the developing sleeve is reduced.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, photosensitive drums and developing sleeves for electrophotography in image forming apparatuses such as electrophotographic copying machines, laser beam printers, facsimiles and printing machines are
A cylindrical member whose surface (cylindrical surface) is finished to have a predetermined surface roughness with high shape accuracy (roundness, straightness, and surface accuracy) is used as the base. The electrophotographic photosensitive drum is manufactured by applying a photosensitive film to the surface of the cylindrical member finished in this way, but the shape accuracy of the cylindrical member is low and the surface has undulations and sufficient roundness and straightness. Otherwise, the photosensitive film has irregularities, which causes various defects in the image of the image forming apparatus. Therefore, in order to obtain a highly accurate image forming apparatus, first, it is required to process the surface of the cylindrical member into a cylindrical surface having no undulations, and the surface roughness, straightness, and roundness are also extremely accurate. is necessary.

A latent image formed on a latent image carrier such as a photosensitive film of a photosensitive drum by an electrophotographic system or an electrostatic recording system is carried by a developing sleeve and carried to the surface of the latent image carrier. Although it is visualized by a developer, it can be a one-component or two-component developer, a magnetic or non-magnetic developer, or an insulating or dielectric developer, and a developing sleeve that carries and conveys these developers. Also requires extremely high accuracy in terms of surface roughness, straightness and roundness.

Generally, the material of such a cylindrical member is Al having a purity of 99.5% or more and Cu having a purity of 0.05 to 0.20%.
Cu-Al alloy containing 0.05% to 0.20% Cu
And a Cu-Mn-Al alloy containing 1.0 to 1.5% Mn, or 0.20 to 0.60% Si and 0.45
A Si—Mg—Al alloy containing 0.90% of Mg is used, and these materials are subjected to extrusion and drawing steps to obtain a certain degree of shape accuracy. However, since a large amount of bending remains in such an aluminum drawn cylinder, it is usually necessary to perform roll straightening or the like thereafter to finish it to a desired shape accuracy. After that, it is cut into a predetermined length, and the ends are finished by cutting for the purpose of removing burrs on both ends and improving the end surface accuracy.

Further, in the case of a developing sleeve, in order to allow the cylindrical member thus formed to have a function as a developing sleeve, the cylindrical surface is sandblasted to roughen the surface to enhance the transportability of the developer (toner). Alternatively, after sandblasting, a paint in which conductive carbon is dispersed in a thermosetting resin is spray-coated for the purpose of improving the charge imparting property of the toner on the cylindrical surface, and the temperature is about 150 ° C. to 17 ° C.
Generally, a coating film is formed by drying and curing in a high temperature bath at 0 ° C. for 20 to 30 minutes.

FIG. 36 shows a manufacturing method of a developing sleeve according to a conventional example. A cylindrical member 1101 made of an aluminum drawn cylinder as shown in FIG.
As shown in (b), one flange member 11 is provided at one end thereof.
02 is press-fitted and combined, a blast process such as a sand blasting process and a conductive paint coating process are performed, a magnet roller 1103 is inserted as shown in (c), and then the other end of the cylindrical member 1101 (d (E), the other flange member 1104 is press-fitted and joined to complete the developing sleeve as shown in (e). The magnet roller 1103 is used to attract the developer (toner) to the surface of the developing sleeve by magnetic force when the developer (toner) used is magnetic toner. The shaft portion 1102b of the one flange member 1102 is coupled to the drive shaft of the rotating mechanism that rotates the developing sleeve, and the shaft portion 1104b of the other flange member 1104 is the shaft neck of the bearing that supports the developing sleeve on the side opposite to the drive shaft. Make up (journal).

In order to suppress the deflection of the cylindrical surface of the cylindrical member used as the developing sleeve or the photosensitive drum within the allowable value, it is extremely important that the axial center of the flange member forming the shaft portion of the cylindrical member is extremely small. is there. For example,
In the case of a developing sleeve for electrophotography, the so-called flange runout caused by the deviation of the axial center of the flange member is 15μ.
It is required to be m or less, and if there is flange runout more than this, it is difficult to obtain a good image. The reason is as follows.

If the flange runout is large, as shown in FIG. 37, when the developing sleeve, which is a cylindrical member, is rotated and the toner is exchanged with the photosensitive drum 1110, the magnetic attraction force of the toner by the magnet roller 1103 is increased. It becomes non-uniform, which causes unevenness in image quality. This is because the cylindrical member 1101 of the developing sleeve eccentrically rotates around the magnet roller 1103 which is fixedly supported as shown in FIGS. 38 (a) to 38 (d).
This is because the distance from the surface of 10 to the magnet roller 1103 changes, and the magnetic attraction force greatly changes as shown in FIG. 39.

[0009] Conventionally, various techniques have been developed in order to prevent the flange runout due to the deviation of the shaft center of the flange member when the flange member is assembled to the cylindrical member. For example,
A roll (see Japanese Utility Model Laid-Open No. 56-154007) in which a plurality of holes are provided on the outer periphery of the flange member to caulk and join the cylindrical member, or an annular groove is provided at the end of the flange member, and the cylindrical member Rolls crimped so that the ends are rolled up (see Japanese Utility Model Laid-Open No. 57-79862) or a cylindrical member is subjected to spigot processing (inner diameter processing), and the fitting portion of the flange member is inserted therein and bonded by an adhesive. Rolls (see JP-A-6-175504) and the like are known. However, the method of joining the flange members by caulking may cause eccentricity of the flange member due to external pressure for caulking, and when an adhesive is used, it is difficult to apply it uniformly and the adhesive does not age. However, there is a problem that the adhesive strength is deteriorated due to the mechanical deterioration.

Therefore, when the flange member is assembled to the end portion of the cylindrical member, the present invention first heats the end portion of the cylindrical member to expand its inner diameter, and in this state, inserts the joint portion of the flange member. We have found that a shrink fit is effective. The method of assembling the cylindrical member to the flange member by shrink fitting has the advantages that it is inexpensive and sufficient bonding strength can be obtained between the two. However, when the flange member comes into contact with the inner surface of the cylindrical member, heat is transferred immediately, and the dimensions of the cylindrical member return to the original state.Therefore, when inserting the joint portion of the flange member, the axial center of the flange member and the cylindrical member is inserted. It is necessary to devise to prevent them from tilting each other or shifting laterally.

Therefore, when the flange member is inserted into the end portion of the cylindrical member, the axial center of the cylindrical member and the flange member are prevented from deviating from each other, and at the same time, the flange portion of the flange member is surely brought into contact with the end surface of the cylindrical member to hold it down. NC that can be attached
We have developed a new assembly robot and are using it to achieve great results.

[0012]

However, if the shrink fitting by the NC assembling robot described above is adopted, it is possible to obtain an extremely highly accurate cylindrical member having a flange runout of 15 μm or less and a sufficient joint strength of the flange members. However, there is an unsolved problem that the manufacturing cost of the cylindrical member cannot be avoided.

That is, in order to prevent the eccentricity of the flange member when the flange member is assembled to the cylindrical member by shrink fitting, first, the inner diameter of the end portion of the cylindrical member, the squareness of the end surface, and the outside of the joint portion of the flange members are It is required to finish the diameter with high accuracy. For example, in order to reduce the runout of the flange member assembled to the cylindrical member to 15 μm or less, the spigot of the cylindrical member is 10 μm or less, the squareness of the end surface of the cylindrical member is 5 μm or less, and the runout of the single flange member is 5 μm or less. I won't. That is, it is necessary to machine the inner diameter machined hole of the cylindrical member and finish the surface of the end face with extremely high accuracy, and machine the joint portion of the flange member with high shape accuracy. If the cylindrical member or the flange member is processed with such high accuracy, the cost of the individual parts of the cylindrical member or the flange member is significantly increased, and as a result, the manufacturing cost of the developing sleeve or the photosensitive drum is increased.

A method has been proposed in which both flange members and a magnet roller are incorporated into a cylindrical member, and the cylindrical surface of the cylindrical member and the shaft portion of each flange member are simultaneously centerless ground to eliminate runout of the flange member. However, in this case, in the process of coating the cylindrical surface of the cylindrical member for final finishing, the cylindrical member is heated to 150 to 170 ° C.
Since it is heated for 20 to 30 minutes, there is a disadvantage that the magnet roller is thermally deformed and many defective products are generated.

The present invention has been made in view of the above-mentioned problems of the prior art, and by adjusting the relative rotational position of the flange member when it is assembled to the cylindrical body, the misalignment of the axial center of the flange member is drastically increased. It is an object of the present invention to provide a cylindrical member which is reduced in amount, has less deflection of the cylindrical surface, and is inexpensive, and a manufacturing method thereof.

[0016]

To achieve the above object, a cylindrical member of the present invention comprises a cylindrical body having an inner diameter machined hole and a flange member shrink-fitted in the inner diameter machined hole of the cylindrical body. However, the relative rotational position of the cylindrical body and the flange member is set based on the eccentric amount of each of the inner diameter processed hole of the cylindrical body and the flange member.

The cylindrical member may be a developing sleeve of the image forming apparatus.

A magnet roller is preferably incorporated in the developing sleeve.

The cylindrical member may be a photosensitive drum of the image forming apparatus.

In the method for manufacturing a cylindrical member according to the present invention, a cylindrical body having an inner diameter machined hole and a flange member which is freely connectable to the inner diameter machined hole of the cylindrical body are respectively produced, and the inner diameter machined hole of the cylindrical body is formed. After measuring the amount of eccentricity of each of the flange members and adjusting the relative rotational position of the cylindrical body and the flange member based on these, the flange member is shrink-fitted into the inner diameter machined hole of the cylindrical body. It is characterized by having a process.

The peaks of the eccentricity amounts of the flange member and the inner diameter processed hole of the cylindrical body are detected, and the phase difference between the two is 180.
The relative rotational position of the cylindrical body and the flange member may be adjusted so that the angle becomes °.

[0022]

When the flange member is shrink-fitted into the inner diameter machined hole of the cylindrical body, the eccentric amount of each of the flange member and the inner diameter machined hole of the cylindrical body is measured in advance, and the flange member and the cylindrical body are cancelled. By adjusting the relative rotational position of the cylindrical member, it is possible to reduce the deviation of the axial center of the flange member with respect to the cylindrical body, and to obtain a cylindrical member with less deflection of the cylindrical surface.

It is only necessary to adjust the rotational position of the flange member before shrink fitting, and it is not necessary to perform high-precision finishing when manufacturing the cylindrical body or the flange member. Therefore, it is possible to manufacture a cylindrical member with less shake without increasing the cost of individual parts such as the cylindrical body and the flange member.

If the flange member is assembled to the cylindrical body without adjusting the rotational position, the eccentricity of the inner diameter machined hole of the cylindrical body and the eccentricity of the flange member may be added, and the deviation of the axial center of the flange member may significantly increase. However, in order to avoid this, it is necessary to manufacture a cylindrical body or a flange member having a high shape accuracy, and the cost of each individual component increases.

[0025]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 illustrates a manufacturing process of a developing sleeve which is a cylindrical member according to an embodiment. First, as shown in FIG. 1A, an aluminum pipe material is extruded and reduced to a predetermined outer diameter. , Cylindrical body 1 cut into a predetermined length
Is manufactured, and the cylindrical surface 1a is finished to a predetermined shape accuracy (straightness, roundness, surface roughness, etc.) by cutting or the like, and then the inner diameter is processed in the vicinity of each end (inlay processing). An inner diameter processed hole 1b is provided. On the other hand, one flange member 2 is manufactured by using the same aluminum as a material, and is shrunk into one inner diameter processed hole 1b of the cylindrical body 1 by an NC assembly robot M ₁ described later. Subsequently, as shown in FIG. 2A, the both ends of the cylindrical body 1 are held by the holders 10, and the sandblasting process of blowing the abrasive grains 12 to the cylindrical body 1 using the blast nozzle 11 is performed. As shown in (b) of the figure, after spraying paint from the spray nozzle 21 to form the coat layer 13, as shown in (c) of FIG. 1, the magnet roller 3 is attached from the other end of the cylindrical body 1. Insert the shaft portion 3a at the tip thereof into the shaft hole of the flange member 2, and use an NC assembly robot M ₂ described later to form an inner diameter processing hole at the other end of the cylindrical body 1 as shown in (d) of FIG. The other flange member 4 is shrink-fitted to 1b.

The flange members 2 and 4 are engaged with the shaft portions 2a and 4a which form a shaft neck (journal) when the developing sleeve (cylindrical member) as a product is rotated and the inner diameter processing hole 1b of the cylindrical body 1. It has joint parts 2b and 4b that mate with each other, and contact parts 2c and 4c that come into contact with the respective end surfaces of the cylindrical body 1, and these are predetermined by cutting, etc., like the cylindrical surface 1a of the cylindrical body 1 and the like. It is processed to the shape accuracy of.

When the inner diameter machined hole 1b of the cylindrical body 1 and the connecting portions 2b, 4b of the respective flange members 2, 4 are eccentric with respect to their respective axial cores, the flange members 2, 4 are burned into the cylindrical body 1. When they are damaged, their axes do not coincide with each other, resulting in large shake. Therefore, before shrink fitting each of the flange members 2 and 4 into the cylindrical body 1, the inner diameter processing hole 1b of the cylindrical body 1 is formed.
Of the eccentricity C ₁ around the axis and the eccentricity C ₂ around the axis of the connecting portions 2b and 4b of the flange members 2 and 4 are individually measured, and the eccentricities C ₁ and C ₂ are offset each other. Position, that is, the flange members 2 and 4 are relatively rotated so that the phase difference between the two peaks is 180 °, and then the connecting portions 2b and 4b are inserted into the bore 1b of the cylindrical body 1. Shrink fit. This is done as follows.

As shown in FIG. 3, the end portion of the cylindrical body 1 and the shaft portion 2a of the one flange member 2 are respectively indicated by arrows A ₁ and A _2.
While being supported by the driving rolls 31 and 32 and being rotated by the drive rolls 31 and 32, respectively, the sensor 33 is provided on the inner surface of the inner diameter machined hole 1b of the cylindrical body 1 and the surface of the coupling portion 2a of the flange member 2.
a and 34 a are brought into contact with each other, and the eccentric amounts C ₁ and C ₂ with respect to the axis O ₁ and O ₂ of the cylindrical body 1 and the flange member 2 are measured by the measuring devices 33 and 34. The outputs of the measuring devices 33 and 34 are introduced into the calculation unit 35, and the rotation amount T of the flange member 2 for making the phase difference between the peaks of the eccentric amounts C ₁ and C ₂ 180 °.
₁ is calculated. This rotation amount T ₁ is transmitted to the controller of the NC assembly robot M ₁ for shrink-fitting the flange member 2 into the cylindrical body 1, and the robot hand 10 will be described later.
Rotate 2.

The eccentricity of the other flange member 4 is measured in the same manner as above, and the rotation amount T ₂ for rotating the flange member 4 is calculated. This rotation amount is transmitted to the controller of the NC assembly robot M ₂ for shrink-fitting the flange member 4 into the cylindrical body 1, and rotates the robot hand 102X as described later.

Incidentally, instead of rotating the robot hands 102 and 102X holding the respective flange members 2 and 4,
The cylindrical body 1 may be rotated.

As described above, the flange runout can be greatly reduced by relatively rotating the flange members 2 and 4 and the cylindrical body 1 so that the eccentric amounts of them are offset from each other and then performing the shrink fit. .

For example, as shown in FIG. 4 (a), the peak of the eccentricity C ₁ of the cylindrical body 1 is 5 μm, and as shown in FIG. 4 (b), the eccentricity of one flange member 2 is large. C
_When the peak of 2 is 2 μm, the phase difference between them is 180
If shrink this flange member 2 after having rotated the cylindrical body 1 so as to °, flange runout C ₃ is the peak as shown in the same figure (c) is reduced to 3 [mu] m. On the contrary, as shown in FIG. 5, the eccentricity C ₁ of the cylindrical body ₁
When the peak of C and the peak of the amount of eccentricity C ₂ of the flange member 2 overlap, the peak of the flange runout C ₃ increases to 7 μm. The same applies to the other flange member 4.

In this embodiment, when the flange members 2 and 4 are shrink-fitted to the cylindrical body 1, the eccentricities of the joint portions 2b and 4b of the flange members 2 and 4 and the inner diameter machined hole 1b of the cylindrical body 1 are eccentric. By measuring the amount and controlling the relative rotational positions of the flange members 2 and 4 so that these peaks have a phase difference of 180 ° with respect to each other, by shrink fitting, the cylindrical body 1 or It is intended to realize a cylindrical body in which the vibrations due to the flange members 2 and 4 are significantly reduced, and the vibrations are small and which are inexpensive, without increasing the cost of the individual components of the flange members 2 and 4.

When shrink fitting each flange member 2, 4 into the cylindrical body 1 without adjusting the relative rotational position of each flange member 2, 4, the joint portion 2 of each flange member 2, 4 is to be fitted.
b, 4b and the shape accuracy of the surface roughness and the like are required to be extremely high so that the eccentricity of the inner diameter machined hole 1b of the cylindrical body 1 is less than the allowable value. The processing costs of Nos. 2 and 4 are soaring that the cost of these individual parts becomes extremely high.

The inventors of the present invention have earnestly studied the method of shrink-fitting the cylindrical body and the flange member, and have obtained the following findings.

The so-called shrink fit, in which the joint portion of the cylindrical body is expanded in diameter by heating and the flange member is loosely fitted in the joint portion, so-called shrink fit is obtained, but the joint with less bending is not obtained. The reason is as follows.

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 body, heat is rapidly transferred and the cylindrical body returns to its original size. At this time, the flange member is displaced from the central axis of the cylindrical body or is bent. In order to solve such a problem, promptly adjust the horizontal displacement of the central axes of the cylindrical body and the flange member, and further surely press the end face of the cylindrical body and the contact portion of the flange member into contact with each other. It is important to attach it. For this purpose, NC assembly robot M
₁ and M ₂ were developed.

Further, in general, the developing sleeve has a magnet roller inserted therein in order to develop a latent image on a latent image carrier formed by an electrophotographic system or an electrostatic recording system. This is because the developer is conveyed by magnetic force, and the wall thickness of the cylindrical body in the developing sleeve is 0.5 mm to 1.5 mm due to the magnetic force of the magnet roller.
It is set in the range of mm. Further, the coupling strength of the flange member in the developing sleeve needs to be 5 kg to 50 kg.

In order to adapt to such a condition, the coupling interference between the cylindrical body and the other flange member needs to be in the range of 0.04 to 0.2% of the reference inner diameter. Further, the joint length is set in a range of 1 mm to 5 mm from the viewpoint of preventing the flange member from falling after the joint and ensuring the joint 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 member after coupling may fall down,
Moreover, it is unnecessary to set it to 5 mm or more. Furthermore, the diameter expansion of the cylindrical body by heating is 0.3 to the standard inner diameter.
The range of 0.5% is preferable, and if 0.3% or less, the flange member may be bent and bonded due to contact between the cylindrical body and the flange member, and if 0.5% or more, the heating temperature becomes high. There is a risk that the material will deteriorate due to heat.

In order to obtain a good image using the developing sleeve, it is preferable that the flange runout be 15 μm or less. The reason is that by setting the precision to 15 μm or less, the occurrence of the shake of the entire developing sleeve is suppressed in the connection with the means for rotationally driving the developing sleeve. In order to obtain such accuracy, as described above, it is necessary to set the spigot angle of the connecting portion of the cylindrical body to 10 μm or less and the end face perpendicularity to 5 μm or less. Further, it is necessary that the deflection of the single flange member is 5 μm or less. Due to such coupling conditions, the flange runout is 1
It becomes 5 μm or less.

Further, the developing sleeve cylindrical body is made to be a cylindrical body in order to obtain a preferable bonding strength in all environments such as high temperature and high humidity and low temperature and low humidity in consideration of environmental conditions of a copying machine and a printer provided with the developing sleeve. It is preferable to use the same material as the flange member. Particularly, aluminum is preferable from the viewpoint of lightness and workability. However, since aluminum has a drawback that it is easily thermally deformed under thermal conditions at high temperatures, the range of diameter expansion of the aluminum cylindrical body is set to 0.3 to 0.5% of the reference inner diameter. It is necessary to suppress the heating temperature.

In a developing sleeve of a printer or the like, it is necessary to combine a flange member with a magnet roller accommodated inside a cylindrical body. In this case,
The other end of the cylinder is heated to expand its diameter, and then the flange member is inserted.However, in order to avoid the fluctuation of the magnetic force of the magnet roller due to the heating for expanding the diameter of this cylinder, the heating temperature of the cylinder is changed. It needs to be suppressed. Due to this necessity, the expanded diameter range of the cylindrical body is set to 0.3 to 0.5% of the reference inner diameter. Further, by setting the heating temperature to 200 ° C. or less, it is possible to suppress the fluctuation of the magnetic force of the magnet roller 3 and prevent the deterioration of the image.

Next, the NC assembly robots M ₁ and M ₂ will be described.

As shown in FIGS. 6 to 8, the NC assembly robot M ₁ includes a stocker 103 for supplying the flange member 2, a robot hand 102 for gripping and transporting the flange member 2, and a cylindrical body 1. A high frequency heating device 104 for heating the end portion, a turntable 105 for loading and unloading the cylindrical body 1 from a conveyor line (not shown), and the like are provided.

(Robot Hand) As shown in FIG. 9, the robot hand 102 is attached to the arm 101 via a cushion unit 111, which will be described later, and the horizontal compliance unit Y ₁ arranged in order from the cushion unit side. An angle adjusting unit Y ₂ and a flange gripping unit Y ₃ are provided.

As shown in FIG. 10, the cushion unit 111 includes a plurality of rods 10 that hang down from the arm 101.
Linear sliding members 11 slidably guided by 1a
1b, each linear sliding member 111b is constantly urged downward in the drawing by a spring 111a, and a horizontal compliance unit Y ₁ is fixed to the lower end thereof.

As the horizontal compliance unit Y _1, as shown in FIG. 11A, the upper plate 130 and the intermediate plate 131 are connected by a parallel first leaf spring 133, and the intermediate plate 131 and the horizontal table 131 are connected. 134 first
Second plate spring 133 is disposed so as to be orthogonal to the plate spring 133.
When the horizontal table 134 is allowed to be displaced in the horizontal direction shown in the figure by connecting it with the leaf spring 135 of FIG.
As shown in FIG. 1B, the upper plate 135 and the intermediate plate 136.
Are connected by a first tension spring 138, and the intermediate plate 136 and the horizontal table 137 are connected by a second tension spring 139 arranged so as to be orthogonal to the first tension spring 138. It is preferable to use a horizontal table that allows the horizontal displacement in the drawing.

The horizontal compliance unit Y ₁ shown in FIG. 10 has the same structure as that shown in FIG. 11B, and the lock plate 122 corresponds to the horizontal table 137.

As shown in FIG. 10, the horizontal compliance unit Y ₁ is equipped with a cylinder rod 121 driven by a lock cylinder 120, and a pressurized fluid is supplied to the lock cylinder 120 to supply the cylinder rod 121.
Is projected downward in the figure, and the lock plate 122 is locked by inserting the tip thereof into the hole 122a of the lock plate 122. In this way, by locking the horizontal compliance unit Y ₁ , the robot hand 102
Positioning can be performed without vibrating.

As shown in FIGS. 10 and 12, the angle adjusting unit Y ₂ and the flange gripping unit Y ₃ are provided with a plurality of parallel hand lock cylinders 141 fixed to the lower surface of the parallel hand fixing member 140 and the respective parallel hand lock cylinders 141. And a taper piece 142 attached to the upper end of the rod 141a of the hand lock cylinder 141.
Is loosely fitted in each fitting hole 122a of the lock plate 122, and a thrust bearing 143 is interposed between the lock plate 122 and the fixing member 140.

In the angle adjusting unit Y ₂ , when the pressurized fluid is supplied to the parallel hand lock cylinder 141, each rod 141a is pulled in, and each taper piece 142 is locked by the lock plate 1.
No. 22 is fitted into the fitting hole 122a, and its tapered surface is pressed against the inner surface of the fitting hole 122a to be fixed to the lock plate 122. The pull-in length of the rod 141a of each parallel hand lock cylinder 141 It is possible to correct the inclination of the parallel hand 150 attached to the lower surface of the parallel hand fixing member 140 by controlling the.

On the lower surface of the parallel hand fixing member 140, a pressing support member 151 for fitting and pressing the flange member 2 held by the plurality of pawls 152 of the parallel hand 150 into one end of the cylindrical body 1 is attached. The pressing support member 151 is provided with a screw ball 153 having a rotatable ball 153a at its lower end. The parallel hand 150 has a robot wrist rotation mechanism 150a for rotating the flange member 2 gripped by the pawl 152.

(High-frequency heating device) As shown in FIG.
The high frequency heating device 104 includes a turntable 10 described later
When the high-frequency current I _{1 is} passed through the coil 108 when the cylindrical body 1 is placed inside the coil 108 by the magnetic field 5, the magnetic field 10
8a is generated, an induced current I ₂ is generated in the cylindrical body 1 to cause the cylindrical body 1 to self-heat, and by changing the frequency of the high frequency current I ₁ , heating from the surface of the cylindrical body 1 toward the center is performed. It is configured so that the state can be changed. Therefore, there is versatility to cope with a change in the wall thickness of the cylindrical body 1.

(Turntable) As shown in FIGS. 14 and 15, a plurality of guide blocks 161 are supported on the base plate 160, and a guide rod 163 is mounted on a linear bush 162 provided in each guide block 161. It is slidably inserted in the vertical direction. The high rotor block 164 is attached via a support member 164a coupled to the upper end of each guide rod 163, and the lower portion of the high rotor block 164 is moved up and down attached to the base plate 160 via a connecting member 107b. It is connected to the rod 107a of the cylinder 107.

A turntable base 166 is rotatably supported above the high rotor block 164 via a cross roller bearing 167.
The turntable base 166 is the high rotor block 16
4 is connected to the rotation shaft 106a of the high rotor 106 housed in the housing 4 via a coupling.
Turntable base 166 with high rotational driving force of 6
It is transmitted to. In addition, a stopper 169 is attached to the turntable base 166, and a shock absorber 168 is provided on the high rotor block 164.
It is devised so that the rotation position of the turntable base 166 can be restricted.

A turntable center pillar 166a is erected on the turntable base 166, and an upper surface of the turntable base 166 and the turntable center pillar 16 are provided.
A cross section V for positioning the cylindrical body 1 is provided at the upper end of 6a.
Two pairs of upper and lower receiving members 110 (see FIG. 8) are provided.
Installed as a set. The rotary cylinders 109 are respectively arranged at the portions facing the receiving members 110, and the cylindrical body 1 is pressed against the receiving members 110 by the pressing rod 109a rotated by the rotary cylinders 109. Is positioned and held, and the cylindrical body 1 can be taken in and out.

(Control Device) The control device of the NC assembly robot M ₁ is, as shown in FIG.
"CPU") 200, a non-volatile memory (ROM) 201 for storing a series of control algorithm programs and a man-machine interface program, a power-backed memory (RAM) 202 for storing teaching data, a servo for driving a robot. Motor 2
A counter 203 for detecting the current position via an encoder 204 connected to 07, a D / A converter 205 connected to a servomotor 207 via an amplifier 206, and other devices for controlling a high-frequency heating device, etc. Control device 2
09, the solenoid valve 210, the sensor 211, etc., the I / O interface for taking in information to CPU200, the external teaching device 214, CRT215, and the interface 213 for communication which connects a keyboard and CPU200, etc. These ROM201, RAM20
2, counter 203, D / A converter 205, I / O
Interface 208, communication interface 21
Reference numeral 3 is bus-coupled to the CPU by a bus 217. Further, the flange member 2 and the bore 1b of the cylindrical body 1 are machined.
The output of the calculation unit 35 (see FIG. 3) that calculates the rotation amount of the flange member 2 from the eccentric amount is introduced into the CPU 200 via the D / A converter 220.

(About operation of NC assembly robot M ₁ )
As shown in FIG. 17, the coupling portion 2b and the shaft portion 2a of the flange member 2 are processed so as to have predetermined roundness and coaxiality, respectively.

FIG. 18 is a flowchart showing the operation of the NC assembly robot M ₁ , and FIG. 19 is a flowchart showing the operation of the turntable 105.

First, when the flange member 2 is set at the supply position on the stocker 103, the arm 101 of the NC assembly robot M ₁ pivots to move the pawl 1 of the robot hand 102.
52 clamps the flange member 2 (step SA
1). After that, the robot hand 102 moves above the coil 108 of the high-frequency heating device 104 and the robot wrist rotation mechanism 150a rotates, and the axial misalignment of the flange member 2 with respect to the inner diameter processed hole 1b of the cylindrical body 1 is offset. The lock cylinder 120 is positioned at the rotation position (step SA2).
The lock plate 122 is unlocked and waits (step SA3).

On the other hand, when the cylindrical body 1 is set on the turntable 105, the rotary cylinder 109 operates to press and position the cylindrical body 1 against the V-shaped receiving member 110 (step SB1). Then, the high rotor 10
6, the cylindrical body 1 rotates together with the turntable base 166 (step SB2), and the stopper 169 comes into contact with the shock absorber 168. When these abut, the cylindrical body 1 is located below the coil 108.
After that, the vertically moving cylinder 107 is turned on, the turntable base 166, the high rotor block 164, and the like are raised, and the upper end of the cylindrical body 1 is placed at the coil 1 as shown in FIG.
It is positioned inside 08 (step SB3). Waiting for such positioning of the cylindrical body 1, the high frequency heating device 1
A drive signal is sent to 04, and the coil 108 is energized to start heating. Thereby, as described above, the opening portion of the cylindrical body 1, that is, the inner diameter processed hole 1b portion on the upper end side self-heats due to the induced current, and the inner diameter processed hole 1b is expanded by thermal expansion.

FIG. 21 shows the temperature change when the upper end of the cylindrical body 1 is heated from the time t ₁ , and FIG. 22 shows the relationship between the temperature of the cylindrical body 1 and the expansion amount.

Due to the expansion of the inner diameter processing hole 1b of the cylindrical body 1,
The inner diameter machined hole 1b and the joint portion 2b of the flange member 2 have a clearance fit relationship from an interference fit relationship, and the joint portion 2b can be inserted into the inner diameter machined hole 1b as follows.

After heating the cylindrical body 1, the coil 108 is de-energized, a heating end signal is sent from the high frequency heating device 104 to the NC assembly robot M ₁ , and the robot hand 102 descends (step SA4). . As a result, the flange member 2 clamped by the pawl 152 is gradually inserted into the inner diameter machined hole 1b of the cylindrical body 1, and the contact portion 2c of the flange member 2 contacts the end surface of the cylindrical body 1, and then the cushion The flange member 2 is pressed by the pressing force generated by the spring 111a of the unit 111.

By the way, if the deviation when the flange member 2 is inserted into the cylindrical body 1 is within the amount corresponding to the chamfer, it is absorbed by the horizontal compliance unit Y _{1 and} the joint portion 2b of the flange member 2 is smoothed. Is inserted into the inner diameter processed hole 1b of the cylindrical body 1. At the start of insertion of the flange member 2, the parallel hand lock cylinder 141 inserts the tapered piece 142 into the insertion hole 1 as shown in FIG.
22a, the parallel hand lock cylinder 141 is immediately unlocked as shown in FIG. 23B after the flange member 2 is inserted (step SA
5), the relative displacement between the lock plate 122 and the parallel hand fixing member 140 is allowed, and the parallel hand 150 releases the clamp of the flange member 2 (step SA6).
The flange member 2 is separated from between the pawls 152. At this time,
The flange member 2 is the spring 11 of the cushion unit 111.
It is pressed downward by the pressing force F generated by the elastic force of 1a, and the pressing force F is the vertical force F1 with the ball 153a as a fulcrum.
And horizontal force F2.

Further, due to the parallel hand lock release (step SA5) and parallel clamp release (step SA6) in the robot hand 102, the flange member 2 is pressed against the end surface of the cylindrical body 1 and its position is regulated, and at the same time. The flange member 2 at room temperature rapidly approaches the temperature of the upper end of the cylindrical body 1 to complete the joining. In this way, the flange member 2 and the cylindrical body 1 are connected with high precision according to the processing precision.

After the completion of such coupling, the robot hand 102 moves up (step SA7), and the lock operation of the parallel hand lock cylinder 141 locks the lock plate 122 and the parallel hand fixing member 140. At the same time, a signal indicating that the flange member 2 has been inserted is sent to the turntable 105, the turntable 105 is turned off by moving the vertical movement cylinder 107 OFF (step SB4), and the high rotor 106 is rotated to the discharge station for the work W (step SB4). Step SB5), rotary cylinder 109
Is turned off and the cylindrical body 1 is released (step SB6), and the cylindrical body 1 is discharged (step SB7). On the other hand, the robot hand 102 locks the horizontal compliance unit Y ₁ by the parallel hand lock cylinder 141, and then moves at high speed on the stocker 103 to clamp the next flange member 2 (step SA9).

In the present invention, the high frequency heating device 1
The heating device is not limited to 04, and other heating devices such as a cartridge heater, a halogen lamp, and a xenon lamp may be used.

Further, in the developing sleeve of the laser beam printer as in this embodiment, in order to keep the coaxiality of the flange member 2 after coupling with the outer diameter of the cylindrical body 1 within 15 μm, The material of the flange member 2 is Al, Fe
Any metal that can be shrink-fitted may be used.

(Modified Example of Robot Hand) Next, FIG.
Also, an NC assembly robot M ₂ for shrink-fitting the other flange member 4 to the cylindrical body 1 containing the magnet roller 3 as shown in FIG. 25 will be described.

When the other flange member 4 is coupled to the cylindrical body 1 having the magnet roller 3 built therein, the shaft portion 3a of the magnet roller 3 must penetrate the other flange member 4 and project to the outside. become. Therefore, the robot hand 1 of the NC assembly robot M ₁ described above
In No. 02, the other flange member 4 cannot be directly pressed by the ball 153a. Therefore, instead of the robot hand 102 described above, a robot hand 102X having an angle absorbing mechanism as shown in FIG. 26 is attached. Hereinafter, the robot hand 10 of the NC assembly robot M ₂
With respect to 2X, the same parts as those of the NC assembly robot M ₁ described above are designated by the same reference numerals, and the description thereof will be omitted. Differences will be described.

As shown in FIG. 26, the robot hand 10
2X is a suction hole 1 for vacuum-sucking the flange member 4.
It has a suction head 185 having 85a. A ball screw 184 having a rotatable ball 184 a is provided inside the suction head 185.
5, a plurality of suction head lock cylinders 181 mounted on
Taper piece 18 attached to the tip of the rod 181a of
By pulling 2 downward, the taper piece 182 is fitted and fixed in the fitting hole 180 a of the parallel hand fixing member 180. That is, the suction head lock cylinder 181 fixes the suction head 185 to the parallel hand fixing member 180. The suction head 185
Is a robot wrist rotation mechanism 15 of the NC assembly robot M _1.
It has a robot wrist rotation mechanism (not shown) similar to that of 0a.

Next, the operation of the robot hand 102X will be described.

Before starting the insertion of the other flange member 4,
Similar to the above-mentioned flange member 2, the eccentric amount of the flange member 4 and the inner diameter processing hole 1b of the cylindrical body 1 is measured, and the rotation amount of the flange member 4 is calculated based on the measured eccentric amount, and the suction head is moved by the robot wrist rotation mechanism described above. 185 is rotated.
At this time, as shown in (a) of FIG. 27, the parallel hand lock cylinder 141 fits and fixes the taper piece 142 into the fitting hole 122a, and the suction head lock cylinder 1
A taper piece 182 is fitted and fixed in the fitting hole 180a by reference numeral 81. Then, after inserting the other flange member 4, as shown in FIG. 27B, the parallel hand lock cylinder 141 immediately performs the unlocking operation, and the relative movement between the lock plate 122 and the parallel hand fixing member 140. While allowing the displacement, the suction head lock cylinder 181 is unlocked to cause the parallel hand fixing member 140 and the suction head 1 to move.
Allow relative displacement between 85. Therefore, the other flange member 4 is joined so as to follow the inner diameter processing hole 1b of the cylindrical body 1.

When the other flange member 4 is coupled, the other flange member 4 is pressed downward by the pressing force F due to the elastic force of the spring 111a of the cushion unit 111,
As shown in FIG. 27A, the parallel hand fixing member 14
0 indicates the thrust bearing 14 with respect to the lock plate 122.
The positional deviation is absorbed by Δx via 3 and the suction head 185 is further moved by Δθ with respect to the parallel hand fixing member 140.
Only the angle is absorbed.

By the way, since the outer diameter of the magnet roller 3 is smaller than the inner diameter of the cylindrical body 1, the position of the magnet roller 3 in the cylindrical body 1 is not fixed and the magnet roller 3 is inclined. If the inclination of the magnet roller 3 is large, the inner diameter φ of the other flange member 4 when the other flange member 4 is joined.
The shaft portion of the magnet roller 3 does not enter into d (see FIG. 25). Therefore, the magnetic body 170 installed on the turntable 105 is used, and the magnetic roller 3 is attracted by the magnetic body 170 and the magnet roller 3.
Is moved to one side in the cylindrical body 1, and the magnet roller 3 is positioned parallel to the cylindrical body 1. Thereby, the interference between the other flange member 4 and the magnet roller 3 is avoided, and the other flange member 4 is inserted into the inner diameter machined hole 1 of the cylindrical body 1.
It can be inserted into b.

Here, an example of the image forming apparatus using the cylindrical member of the present invention will be described.

FIG. 28 shows a schematic construction of a transfer type electrophotographic apparatus using a developing sleeve and a photosensitive drum which are based on a cylindrical member according to the present invention.

In FIG. 28, the photosensitive drum 301 as an image bearing member is rotationally driven around the shaft 301a in the arrow direction at a predetermined peripheral speed. During rotation of the photosensitive drum 301, the charging unit 302 uniformly charges the periphery of the photosensitive drum 301 to a predetermined positive or negative potential, and then an exposure unit 303 performs an optical image exposure L (slit exposure, laser beam) by an image exposure unit (not shown). Scanning exposure). As a result, electrostatic latent images corresponding to the exposed images are sequentially formed on the peripheral surface of the photosensitive drum.

The electrostatic latent image is then developed on the developing sleeve 309.
The toner is developed by the developing means 304 having a photosensitive drum 301 between the photosensitive drum 301 and the transfer means 305 from the paper feeding portion (not shown) by the transfer means 305.
The transfer material P is sequentially transferred onto the surface of the transfer material P fed in synchronism with the rotation.

The transfer material P that has undergone the image transfer is separated from the surface of the photosensitive drum and is introduced into the image fixing means 308, where it is subjected to image fixing and printed out as a copy. The surface of the photosensitive drum 301 after the image transfer is cleaned by the cleaning unit 306 to remove the transfer residual toner, and is further discharged by the pre-exposure unit 307 to be repeatedly used for image formation.

As the charging means 302 for the photosensitive drum 301, a corona charging device is generally widely used. Also,
The corona transfer means is also widely used as the transfer means 305. The electrophotographic apparatus may be configured by integrally combining a plurality of components among the above-described components such as the photosensitive drum, the developing unit, and the cleaning unit, and the unit may be detachably attached to the apparatus main body. . For example, at least one of charging means, developing means and cleaning means
Alternatively, the unit may be integrally supported together with the photoconductor, and the unit may be detachably attached to the apparatus main body, and the unit may be detachable by using a guide means such as a rail of the apparatus main body.

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 a document, or the document is converted into a read signal, and a laser beam scans by this signal, an LED. It is performed by driving the array, driving the liquid crystal shutter array, or the like.

When used as a facsimile printer, the light image exposure L becomes an exposure for printing the received data. FIG. 29 is a block diagram showing an example of this case.

The controller 321 controls the image reading section 320 and the printer 329. The entire controller 321 is controlled by the CPU 327. The read data from the image reading unit is transmitted to the partner station through the transmission circuit 323. The data received from the partner station is sent to the printer 329 through the receiving circuit 322, and predetermined image data is stored in the image memory 326. Printer controller 32
Reference numeral 8 controls the printer 329. 324 is a telephone.

The image received from the line 325 (image information from the remoter terminal connected via the line) is demodulated by the receiving circuit 322, and then the CPU 327 performs a decoding process of the image information, and sequentially the image memory 326. Stored in. When it is stored in the image memory 326 of at least one page, the image of that page is recorded. CPU
327 reads the image information of one page from the image memory 326 and sends the decoded image information of one page to the printer controller 328. Printer controller 32
When the printer 8 receives the image information of one page from the CPU 327, the printer 3 prints the image information of the page.
Control 29. The image is received and recorded as described above.

By the way, the developing means 304 supplies the developer to the electrostatic latent image on the photosensitive drum 301 by the rotation of the developing sleeve 309 to develop the electrostatic latent image.
In order to satisfactorily supply the developer to the photosensitive drum 301, the developing sleeve 309 needs to be opposed to the photosensitive drum 301 at a predetermined interval.

FIG. 30 is a perspective view showing the positional relationship between the developing sleeve 309 and the photosensitive drum 301, and FIG. 31 is a sectional view of the non-driving side end of the developing sleeve 309.

As shown in FIG. 30, the developing sleeve 309.
The flange members 311 at both ends thereof are rotatably supported by the slide bearings 310. Further, spacer rollers 312 for keeping a constant distance δ between the surface of the photosensitive drum 301 and the surface of the developing sleeve 309 are rotatably provided at both ends of the developing sleeve 309. The spacer roller 312 is made of a resin material having good slidability, and its outer diameter is set to be larger than the outer diameter of the developing sleeve 309 by twice the separation distance δ (2δ). Therefore, as shown in FIG. 31, by bringing the spacer roller 312 into contact with the peripheral surface of the photosensitive drum 301, the distance δ between the surface of the photosensitive drum 301 and the surface of the developing sleeve 309 is kept constant.

FIG. 32 is a side view of the developing means 304, and FIG.
FIG. 6 is a cross-sectional view of an end portion of the developing sleeve 309 on the drive shaft side.

32 and 33, a drive gear 313 is attached to the flange member 311 on the drive shaft side, and the drive gear 314 on the drive shaft 315 side of the apparatus main body is selectively attached to the drive gear 313. The developing sleeve 309 is rotationally driven by meshing with.

FIG. 34 is a cross-sectional view of a case where the developing roller 309 is provided with a magnet roller 316. The developing sleeve 309 is rotationally driven in the direction of arrow A outside the magnet roller 316 held in a stopped state. Further, the photosensitive drum 301 rotates in the direction of arrow B.

(Specific Example of Manufacturing Method of Developing Sleeve) A cylindrical body 1 made of an aluminum alloy extruded and drawn cylindrical tube having an outer diameter of 12 mm, an inner diameter of 10.4 mm and a length of 246 mm.
Is manufactured, and one end has an inner diameter of 10.610 mm and a length of 5
The inner diameter processed hole 1b of mm was cut. The cylindrical body 1 cut as described above has a cylindrical shape as shown in FIG.
A when the positions S ₁ and S ₂ at both ends of the
The deflection of the dots, that is, the inlay, was 8 μm, and the squareness of the end face was 3 μm. This cylindrical body 1 is provided with an inner diameter processing hole 1b
Was set on the NC assembling robot apparatus M ₁ .
On the other hand, the first flange member 2 has an outer diameter of 10.
The length was 618 mm and the length was 1.5 mm.

At the time of connecting the flange member 2 and the cylindrical body 1, 5 mm from the upper end of the cylindrical body 1 by a high frequency heating device.
Of the inner diameter of the cylindrical body 1 is heated to 42 μm.
The diameter was expanded by m. Then, the flange member 2 was inserted into and joined to the cylindrical body 1.

In this way, the flange member 2 is coupled to one end side of the cylindrical body 1, and then the positions S ₁ and S ₂ at both ends of the cylindrical body 1 are held and rotated as shown in FIG. When the deflection of the position a of the flange member 2 when measured was measured,
It was 10 μm. Moreover, a force of 10 kg was required to forcibly pull out the flange member 2 from the cylindrical body 1.

Further, such a cylindrical body 1 was subjected to sandblasting as shown in FIG. 2 (a). The sandblasting conditions are shown below.

Abrasive grains; Alumina powder (# 100, Showa Denko KK) Discharge pressure; 2.8 Kg / cm2 Nozzle distance; 120 mm Blasting time; 60 seconds Revolution of cylinder 1; 60 rpm After that, blasting was performed in this way. As shown in FIG. 2 (b), the coating material for improving the charge imparting property is sprayed onto the cylindrical body 1 to form a coating layer, and then the coating layer is put in a drying oven at 150 ° C. for about 30 minutes. The coating film was heat cured. The paint was mixed with 10 parts by weight of conductive carbon, 90 parts by weight of graphite (average abrasive grain 7μ), and 100 parts by weight of phenol resin so that the MEK solvent had a solid content of 10%, and was mixed with glass beads in a paint shaker. Then, dispersion was carried out for 5 hours for adjustment.

In this way, the flange member 2 is connected to one end side of the cylindrical body 1, the magnet roller 3 is inserted, and then the second flange member 4 is press-fitted to the other end side of the cylindrical body 1 to develop. Completed the sleeve. In this way, by incorporating the magnet roller 3 after the resin applied on the surface of the cylindrical body 1 is heated and hardened, changes in the magnetic force curve and thermal deformation of the magnet roller 3 due to heat during the heating and hardening can be avoided.

The developing sleeve thus completed is mounted on a process cartridge of a laser beam printer manufactured by Canon Inc., and an image is formed. As a result, there is a problem such as pitch unevenness due to the wobbling of the cylindrical surface 1a of the cylindrical body 1. A good image was obtained.

Instead of forming the unevenness by the blasting process of FIG. 2A, spherical particles of 1 μm to 30 μm are added to the paint 212 in the coating process of FIG. 2B to form the unevenness. It is also possible to do so. 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 if it is 30 μm or more, the particle size is too large and the adhesion to the resin deteriorates.

[0102]

Since the present invention is configured as described above, it has the following effects.

It is possible to reduce the deviation of the axial center of the flange member when it is assembled to the cylindrical body, and to greatly reduce the deflection of the cylindrical surface of the cylindrical member. The process of assembling the flange member to the cylindrical body by shrink fitting does not require hole processing or the like in the flange member or the cylindrical body, and in addition, since the device is simple, it is greatly useful for reducing the manufacturing cost of the cylindrical member. . By adopting such an inexpensive assembly method by shrink fitting, and without requiring high-precision finishing of the cylinder or flange member, simply adjust the rotational position of the flange member in the shrink fitting process. Since the flange runout is reduced, it is possible to realize a cylindrical member that has little runout and is inexpensive.

By using such a cylindrical member as a developing sleeve or a photosensitive drum of an image forming apparatus, it is possible to greatly contribute to high performance and low cost of the image forming apparatus.

[Brief description of drawings]

1A and 1B show a manufacturing process of a developing sleeve according to an embodiment, in which (a) and (b) are processes for connecting one flange member to a tubular body, and (c) and (d) are for a cylindrical body. The steps of inserting the magnet roller from the other end and joining the other flange member are respectively shown.

FIG. 2 shows a sandblasting process and a painting process.

FIG. 3 illustrates a method for measuring an eccentric amount of an inner diameter processed hole of a cylindrical body and a flange member.

FIG. 4 is a graph showing an eccentric amount of an inner diameter processed hole of a cylindrical body and an eccentricity of a flange member and a cylindrical surface of the cylindrical member when these are offset.

FIG. 5 is a graph showing an eccentric amount of an inner diameter processed hole of a cylindrical body and an eccentricity of a flange member and a cylindrical surface of the cylindrical member when these are added.

FIG. 6 is a schematic side view showing a first NC assembly robot used for manufacturing a cylindrical member.

7 is a schematic front view of the NC assembly robot shown in FIG.

8 is a schematic plan view of the NC assembly robot shown in FIG.

9 is a schematic configuration diagram of a robot hand of the NC assembly robot shown in FIG.

10 is a schematic partial cross-sectional view showing a main part of the robot hand shown in FIG.

FIG. 11 is a schematic perspective view showing a typical example of a horizontal compliance unit of a robot hand.

12 is a schematic partial cross-sectional view of the tip portion of the robot hand shown in FIG.

13 is an explanatory diagram of a high frequency heating device in the NC assembly robot shown in FIG.

14 is a schematic partial cross-sectional view showing a turntable of the NC assembly robot shown in FIG.

15 is a schematic side view of the turntable shown in FIG.

16 is a block diagram of a control device of the NC assembly robot shown in FIG.

FIG. 17 is an explanatory diagram of a flange member and a cylindrical body in the cylindrical member of the present invention.

18 is a flowchart for explaining the operation of the robot hand shown in FIG.

19 is a flowchart for explaining the operation of the turntable shown in FIG.

FIG. 20 is a schematic cross-sectional view showing a cylindrical body and one flange member.

21 is a graph showing the relationship between the heating time and the temperature of the cylindrical body by the NC assembly robot shown in FIG.

22 is a graph showing the relationship between the temperature and the expansion amount of the cylindrical body by the NC assembly robot shown in FIG.

23 is an explanatory diagram showing the operation of the robot hand shown in FIG.

FIG. 24 is a schematic sectional view of a developing sleeve.

FIG. 25 is an explanatory view showing a heated state of the cylindrical body and the other flange member in the developing sleeve shown in FIG. 24.

FIG. 26 is a schematic cross-sectional view showing a robot hand of a second NC assembly robot.

27 is an explanatory diagram showing the operation of the robot hand shown in FIG. 26. FIG.

FIG. 28 is an explanatory diagram of an electrophotographic image forming apparatus.

FIG. 29 is a block diagram for explaining the operation of the image forming apparatus shown in FIG. 28.

30 is a perspective view showing a photosensitive drum and a developing sleeve in the image forming apparatus shown in FIG.

FIG. 31 is an enlarged cross-sectional view of one end side of the photosensitive drum and the developing sleeve shown in FIG.

32 is an explanatory diagram of a drive mechanism in the image forming apparatus shown in FIG.

FIG. 33 is an explanatory diagram of a developing sleeve driving mechanism in the image forming apparatus shown in FIG. 28.

34 is an explanatory diagram showing the positional relationship between the photosensitive drum and the developing sleeve in the image forming apparatus shown in FIG.

FIG. 35 is an explanatory diagram of a shake measurement position of a cylindrical body according to the present invention.

FIG. 36 is an explanatory diagram illustrating a manufacturing process for a general developing sleeve.

FIG. 37 is a partially sectional elevational view showing the developing sleeve and the photosensitive drum.

FIG. 38 is a diagram illustrating a state in which a cylindrical member is eccentrically rotated with respect to a magnet roller.

FIG. 39 is a graph showing the relationship between the magnetic attraction force of the magnet roller and the distance between the magnet roller and the developing sleeve.

[Explanation of symbols]

 1 Cylindrical body 1a Cylindrical surface 1b Inner diameter processing hole 2,4 Flange member 2a, 4a Shaft part 2b, 4b Coupling part 2c, 4c Abutting part 3 Magnet roller 101 Arm 102, 102x Robot hand 103 Stocker 104 High frequency heating device 105 Turntable 106 High Rotor 107 Vertical Cylinder 108 Coil 109 Rotary Cylinder 110 Receiving Member 111 Cushion Unit 150a Robot Wrist Rotating Mechanism

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G03G 21/00 350 G03G 21/00 350

Claims (6)

[Claims] 1. A cylindrical body having an inner diameter machined hole, and a flange member shrink-fitted in the inner diameter machined hole of the cylindrical body, wherein the relative rotational position of the cylindrical body and the flange member is the cylinder. A cylindrical member, wherein the cylindrical member is set on the basis of the eccentric amounts of the inner diameter processed hole of the body and the flange member. 2. The cylindrical member according to claim 1, wherein the cylindrical member is a developing sleeve of an image forming apparatus. 3. The cylindrical member according to claim 2, wherein a magnet roller is built in the developing sleeve. 4. The cylindrical member according to claim 1, wherein the cylindrical member is a photosensitive drum of an image forming apparatus. 5. A cylindrical body having an inner diameter machined hole and a flange member that is freely connectable to the inner diameter machined hole of the cylinder body are manufactured, and eccentric amounts of the inner diameter machined hole of the cylinder body and the flange member are respectively produced. And adjusting the relative rotational positions of the cylindrical body and the flange member based on these, and a method of manufacturing a cylindrical member having a step of shrink-fitting the flange member into the inner diameter processed hole of the cylindrical body. . 6. The peak of the eccentricity amount of each of the flange member and the inner diameter processed hole of the cylindrical body is detected, and the phase difference between them is 18
The method for manufacturing a cylindrical member according to claim 5, wherein the relative rotational positions of the cylindrical body and the flange member are adjusted so as to be 0 °.