JPH05317992A - Cylindrical member - Google Patents

Abstract

PURPOSE:To eliminate insufficient combining force between a cylinder and an end part engaging member of a gear flange, etc., limitation of a material of the end part engaging member. adverse conduction between the engaging member and electrode plates arranged to the end part engaging member, insufficient accurate combination of the end part engaging member to the cylinder and low workability for combining the end part engaging member with the cylinder. CONSTITUTION:In a cylindrical member having the end part engaging member 1 at least to the one end of the cylinder 3, the end part engaging member is pressed into the cylindrical member, and further the cylindrical end part is combined by severely bending into the recessed part 2 of the insert part into the cylindrical end part of the end part engaging member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical member used in office equipment such as copiers, printers and facsimiles.

[0002]

2. Description of the Related Art Conventionally, as cylindrical members used in electrophotographic apparatuses, a cylindrical electrophotographic photosensitive member (hereinafter referred to as a photosensitive drum), a developing sleeve, a platen roller, a conveying roller, a fixing roller, etc. In general, an end engaging member such as a gear flange is coupled to the cylindrical member by various methods at the end of the cylindrical member in order to transmit the driving force. The bonding method mainly includes adhesion and press fitting.

As a method of adhesion, an appropriate amount of adhesive is applied to the portion of the gear or the flange to be inserted into the cylinder, and after fitting, the place is not affected by temperature and humidity until the adhesive is completely cured. It was stored in (environment) and completely cured. Instant adhesives, adhesive primers and anaerobic adhesives, etc. are mainly used as the types of adhesives used for adhesion, and they are appropriately used depending on their use, purpose, required strength and the like.

Further, as a method of press-fitting, an end engaging member having an outer diameter larger than the inner diameter of the end of the cylindrical member has been inserted into the cylindrical member while applying pressure and joined. At this time, the coupling force with the end engaging member can be set by changing the press-fitting amount. However, relatively high rotation torque such as the photosensitive drum and the developing sleeve is relatively high. Since such a thing requires a high coupling force, it was press-fitted with a considerably large amount of press-fitting to maintain the coupling torque.

However, in the above conventional cylindrical member,
There were some drawbacks listed below. (1) In the case of bonding, when bonding is performed in an environment of high temperature and high humidity (for example, temperature: 32.5 ° C., relative humidity: 85%) and completely cured in the same environment, it is exposed to air in the middle of the effect. The torque strength is lowered because the water content adversely affects the adhesive surface. (2) Depending on the type of adhesive, it may take a very long curing time for the adhesive to completely cure, so it is necessary to secure a storage space between them and to keep the temperature and humidity of the storage environment constant. Equipment and the like for keeping the same are necessary, and there are many disadvantages from the viewpoint of cost, management, and productivity. (3) In order to obtain high adhesive strength, there are restrictions on the materials of gears and flanges. (4) When an electrode plate that comes into contact with the inner surface of the cylinder is provided at the end of the gear or flange to establish continuity with the apparatus body, the adhesive will drip before the adhesive is completely cured after the adhesion,
The adhesive may flow into the contact portion between the electrode plate and the inner surface of the cylinder, resulting in poor conduction. (5) In the case of bonding by adhesion, the fitting portion between the end engaging member and the cylinder is a fit with a certain amount of clearance (10 to 50 μm) so that the adhesive may be accumulated in advance. Since there is a gap, the end engaging member may be fitted by being tilted, and may be adhesively bonded in the state as it is. When the end engaging member is joined to the cylinder by tilting or bending, the dimensional accuracy such as straightness and runout is required with high accuracy like the developing sleeve and the photosensitive drum. In the cylindrical member, the inclination or the bending sometimes causes a defect in the image as uneven pitch. (6) In the case of press fitting, the coupling force between the gear or the flange and the cylinder was insufficient.

[0006]

Problems to be solved are problems such as insufficient coupling force between a cylinder and an end engaging member such as a gear flange, a restriction on the material of the end engaging member, and an end engaging member. This is a point of poor productivity such as poor electrical connection with the electrode plate provided on the mating member, poor precision connection of the end engaging member to the cylinder, and joining the end engaging member to the cylinder.

[0007]

SUMMARY OF THE INVENTION The present invention provides a cylindrical member having an end engaging member on at least one end of the cylinder,
An end engaging member is press-fitted into the cylindrical member, and the cylindrical end is bent and cut into a concave portion of a portion of the end engaging member to be inserted into the cylindrical end, and is joined. It is a member.

The cylindrical member according to the present invention has a strong coupling force between the cylinder and the end engaging member. This strong coupling force is provided by cutting the end of the cylinder into the recess of the end engaging member inserted in the end of the cylinder. That is, not only the cylindrical end portion is bent into the concave portion of the end engaging member, but also the cut and bent cylindrical end portion can be tightly inserted into the concave portion of the end engaging member. Cutting and bending of the end portion of the cylinder can be easily performed by an abutting member. Further, in the case of a fit in which there is a clearance in the engaging portion between the end engaging member and the cylindrical member, the punch faces the concave portion of the end engaging member from multiple directions in order to cut and bend the end of the cylindrical member. However, strictly speaking, the tips of the punches from multiple directions do not come into contact with each other at the same time, and the contact time slightly deviates. For this reason, if there is a clearance in the engaging portion, the punch may be cut and bent from the portion where the punch first comes into contact, and the end engaging member may be moved to one side, and the concentricity between the cylindrical member and the end engaging member may be shifted. is there. However, when the end engaging member is press-fitted, since there is no clearance, the end engaging member is fixed inside the cylindrical member, and even if the punches come in contact with each other from multiple directions with a time lag, Coupling is possible without being affected by it.

The wall thickness of the end of the cylinder to be cut and bent is 0.
3 to 1.5 mm, particularly 0.5 to 1.5 mm is suitable. Further, the cut length of the cut and bent portion of the cylindrical end portion is preferably 0.2 mm or more, and particularly preferably 0.25 mm or more.

The cylindrical member according to the present invention is required to have strong connection between the photosensitive drum and each image holding member cylinder including the phenomenon sleeve and the end engaging member. Platen roller,
It is also effective as various roller members to which a driving force is transmitted, such as a transport roller, a fixing roller and a printing plate roller.

The photosensitive drum has various configurations in order to obtain predetermined characteristics or according to the type of electrophotographic process applied. As typical electrophotographic photoreceptors, there are a photosensitive drum having a photoconductive layer formed on a cylinder and a photosensitive drum having a protective layer on the surface thereof, which are widely used. A photosensitive drum composed of a cylinder and a photoconductive layer is used for image formation by the most general electrophotographic process, that is, charging, image exposure and phenomenon, and, if necessary, transfer. Regarding the photosensitive drum provided with a protective layer, this protective layer is for the purpose of protecting the photoconductive layer, improving the mechanical strength of the photosensitive drum, improving the dark decay characteristics, or applying to a specific electrophotographic process. It is provided for.

Some representative examples of other image bearing members are described next. (1) For the purpose of improving the reusability of the electrophotographic photosensitive member, the electrostatic image formed on the electrophotographic photosensitive member is transferred to another image holding member for development, and then the toner image is transferred to the recording member. To be done. (2) In addition, as another electrophotographic process of forming an electrostatic image on another image holding member corresponding to the electrostatic image formed on the electrophotographic photosensitive member, a screen shape having a large number of fine openings An electrostatic image is formed on the electrophotographic photosensitive member by a predetermined electrophotographic process, and another image holding member is subjected to corona charging processing via this electrostatic image to modulate the ion current of the corona and electrostatically discharge it. An example is a process of forming an image on another image holding member, toner-developing this image, and transferring it to a recording medium to form a final image. (3) According to another electrophotographic process, the toner image formed on the electrophotographic photosensitive member or other image holding member is not directly transferred to the recording medium, but is transferred to another image holding member, and then, The toner image is transferred from the image holding member to the recording medium and fixed. This process is particularly useful for color image formation or high speed copying. Usually, many recording materials are highly flexible, such as paper and film, and therefore, rather than transferring the three-color image to the recording material while accurately aligning them,
It is possible to transfer a three-color image to an image holding member that can be formed of a material that hardly causes deformation, and transfer the three-color image to the recording medium at one time to form a more accurately aligned color image. Further, it is effective for the toner image to be transferred to the recording medium through the image holding member for the speedup of copying. (4) As another process, an electric signal can be applied to the multi-needle electrode to form an electrostatic image on the surface of the image holding member according to the electric signal, and this can be developed into an image.

The image holding member used in the electrostatic image forming process as in (1) to (4) does not require a photoconductive layer.

As described above, as an image holding member on which an electrostatic image or a toner image is formed, the surface layer is generally an insulating layer, including an electrophotographic photosensitive member whose surface layer is a protective layer or a photoconductive layer. Various members are used.

The developing sleeve carries a toner or toner and carrier particles on the surface thereof, and serves to convey the toner to a developing site. In the case of magnetic brush development, the developing sleeve is a non-magnetic cylinder, and has a magnet built therein. The developing sleeve is formed by molding a metal such as aluminum, nickel or stainless steel, or an alloy compound into a cylindrical shape, and if necessary, its surface is provided with a predetermined surface roughness by means such as electrolysis, blasting and filing. To process.

A typical method of manufacturing a cylindrical member according to the present invention is as follows. The end engaging member is aluminum, copper,
Insert into the end of a cylinder made of stainless steel or the like. The insertion portion of the end engaging member is provided with a recess having an appropriate shape (width, height, depth, etc.) toward the inside of the end engaging member. An abutting member having an acute angle at the tip and having a width substantially the same as that of the concave portion is abutted against the cylindrical end portion fitted in the concave portion, so that the cylindrical end portion is moved from that position with a certain amount of advance. Bending and shearing are performed almost at the same time with the end of the cylinder following the shape of the recess by advancing toward the inside of the recess, and the sheared surface of the bent end of the cylinder is in close contact with the shape of the recess. And the inner surface of the bent end of the cylindrical portion is tightly adhered to the bottom surface of the recess.

The case where the developing sleeve is used as the cylindrical member will be described below with reference to the drawings. FIG. 1 is a sectional view of a developing sleeve according to the present invention. In the figure, 1 is a flange which is connected to the end of the developing sleeve and which supports and rotates the developing sleeve, 2 is a recess formed in the insertion portion of the flange into the cylinder, and 3 is formed from an aluminum alloy. The flange 1 is inserted in a cylindrical cylinder. 2 is a partially enlarged view of the recessed portion 2 provided in the flange, FIG. 3 is a sectional view of a step of cutting and bending a cylindrical end portion, and FIG. 4 is a plan view thereof. Reference numeral 4 denotes an abutting member for bending and shearing after the press-fitting of the flange 1 into the cylindrical cylinder-3, and the cylindrical end of the cylindrical cylinder-3 enters and contacts the recess 2 provided in the flange 1. Is.

The features of the present invention will be described below with reference to FIGS.

The flange 1 and the cylinder 3 are inserted into the cylinder 3 along the outer diameter of the insertion portion of the flange 1. The press-fitting of the flange 1 into the cylinder 3 at this time is such that the press-fitting amount of the flange 1 is generally in the range of 10 μm to 150 μm, preferably 10 μm to
100 μm Particularly preferably, 10 μm to 50 μm is preferable.
The press-fitting amount here means the difference between the outer diameter of the insertion portion of the flange 1 and the inner diameter of the insertion portion of the cylinder 3. This press-fitting amount is appropriately set depending on the material of the flange 1 and the cylinder 3.

By press-fitting the flange 1 in this way, it is possible to eliminate the clearance at the insertion portion between the flange 1 and the cylinder 3 and to eliminate rattling due to the clearance of the flange 1.

Next, after press-fitting the flange 1 and the cylinder 3,
From the outer peripheral portion of the cylinder 3, a claw-shaped butting member 4 having a sharp tip is in contact with the outer peripheral surface of the cylinder 3 from four locations in the circumferential direction of the flange 1 as shown in FIG. At this time, the height position of the abutting member 4 is the same height as the position of the end surface of the cylinder 3, and the width of the recess 2 provided in the insertion portion of the flange 1 inserted in the cylinder 3 and The width of the tip of the abutting member 4 is equal to the width of the abutting member 4, and the abutting member 4 moves linearly in a state where the positional relationship is not displaced,
It contacts the outer periphery of the cylinder 3. When the abutting member 4 enters toward the inside of the flange 1 with a certain amount of entry from this contact point, the abutting member 4 enters from the end of the cylinder 3.
The bent end of the cylinder 3 is bent along the shape of the surface of the cylinder 1 and the end of the cylinder 3 along the width of the recess 2 provided in the insertion portion of the flange 1 is sheared and the partially bent cylinder end is recessed 2 The flange 1 and the cylinder 3 are joined together by being fixed in a state where they are in close contact with the shape.

At this time, it is more preferable that the abutting member 4 is advanced, so that the end portion of the cylinder 3 is completely sheared, and the sheared surface thereof is in close contact with the shape of the recess 2. Due to this state, the sheared surface of the partially bent end is intimately connected to the concave portion 2 provided in the insertion portion of the flange 1, so that the developing sleeve is rotated in the rotational direction and the axial direction. It is possible to maintain a higher bonding force without causing looseness or looseness. Further, in FIG. As shown in B and C, the positions of the recesses 2 provided in the flange 1 at this time may be four places (A), eight places (B), two places (C), etc. and may extend over multiple parts.

FIG. 6 is an explanatory view of dimensional relationships in the process of bending the end portion of the cylinder. 6A shows the abutting member 4
Is the amount of penetration into the inside of the cylinder 3 from the position in contact with the outer peripheral surface of the cylinder 3, and the coupling force between the flange 1 and the cylinder 3 can be controlled by adjusting this amount of penetration a. .. b is the thickness of the cylinder 3, and a developing sleeve used in a copying machine or the like is generally a drawn tube based on an aluminum alloy, but in the embodiment described later (external cylinder of Showa Aluminum Co., Ltd.). Diameter φ16.00
mm, wall thickness 0.7 mm, cylindrical inner diameter φ14.4 mm, length 248 mm). The thicker the wall thickness b, the greater the coupling torque strength. However, if the wall thickness is too thick, a very large force is required when the end of the cylinder 3 is bent into the abutting member 4, so that the peripheral portion thereof. In order to influence the dimensional accuracy of 0.
It is preferably within 3 to 1.5 mm. More preferably 0.6
It is desirable to be in the range of 1.0 mm. The tip angle e of the abutting member 4 can be freely set depending on its shape or the like, but basically it forms an acute angle, preferably 10 to 70 °,
More preferably, the range of 20-40 ° is good. In the examples described below, a claw-shaped abutting member having a smooth surface was used, and the tip angle thereof was 30 ° and the width was 3 mm.

F is a length of an end portion cut when the shearing surface of the cylinder 3 is cut and bent with respect to the concave portion 2. The larger the cut length is, the stronger the binding force is. The cut length f depends on the entering amount a, but is preferably 0.2 mm or more, and particularly preferably 0.4 mm or more.

FIG. 7 is an explanatory view of the dimensional relationship of the concave portion of the flange. c is the width dimension of the recess 2 provided in the gear or the flange 1, and d is the height dimension of the recess 2. The size of these recesses 2 can be set to any value as appropriate depending on the outer diameter, wall thickness, etc. of the cylinder 3, but in the case of the above cylinder size, the width c is 1.0 mm or more, The height dimension d is preferably 0.5 mm or more. Furthermore,
The shape of the recess 2 is not limited to such a square hole shape, but may be a round hole shape, an arc shape, a triangular hole shape, or the like, and the shape and dimensions may be set depending on the shape or outer diameter of the gear or the flange 1. The shape of the tip of the abutting member 4 may be freely changed according to its shape and size.

The width of the end of the cylinder bent into the recess is
It is preferable that it is equal to the width of the recess x 0.95 to 1, especially the width of the recess.

FIG. 8 shows a schematic structure of a general transfer type electrophotographic apparatus using the cylindrical member according to the present invention as a photosensitive drum or a developing sleeve.

In the figure, reference numeral 101 denotes a photosensitive drum as an image bearing member, which is rotationally driven around a shaft 101a at a predetermined peripheral speed in the arrow direction. In the course of its rotation, the photosensitive drum is uniformly charged on its peripheral surface by a predetermined positive or negative potential by a charging means 102, and then at an exposure section 103, an optical image exposure L (slit exposure / laser beam) is performed by an image exposing means (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 by the developing sleeve 104.
The toner is developed by the developing means 104 having a and the toner developed image is fed by the transfer means 105 between the photosensitive drum 101 and the transfer means 105 in synchronization with the rotation of the photosensitive drum from a paper feeding unit (not shown). The images are sequentially transferred onto the surface of the transfer material P.

The transfer material P which has received the image transfer is separated from the surface of the photosensitive drum and is introduced into the image fixing means 108 to be subjected to the image fixing and printed out as a copy.

After the image transfer, the surface of the photosensitive drum is cleaned by the cleaning means 106 to remove residual toner after transfer, and is further discharged by the pre-exposure means 107 to be repeatedly used for image formation. ..

A corona charging device is generally widely used as the uniform charging means 102 for the photosensitive drum. Also, as the transfer device 5, corona transfer means is generally widely used. The electrophotographic apparatus is configured by integrally combining a plurality of components such as the photosensitive drum, the developing unit, and the cleaning unit described above as an apparatus unit, and this unit is configured to be detachable from the apparatus main body. May be.
For example, at least one of a charging unit, a developing unit, and a cleaning unit is integrally supported with a photosensitive member to form a unit, which is a detachable single unit in the apparatus main body.
It may be detachable by using a guide means such as a rail of the apparatus body. At this time, the above device unit may be provided with a charging unit and / or a developing unit.

When the electrophotographic apparatus is used as a copying machine or a printer, the optical image exposure L is reflected light or transmitted light from an original, or an original is read out 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.

When used as a facsimile printer, the optical image exposure L becomes an exposure for printing the received data. FIG. 8 is a block diagram showing an example of this case.

The controller 111 controls the image reading section 110 and the printer 119. The entire controller 111 is controlled by the CPU 117. The read data from the image reading unit is transmitted to the partner station through the transmission circuit 113. The data received from the partner station is sent to the printer 119 through the receiving circuit 112. Predetermined image data is stored in the image memory. Printer controller 118
Controls the printer 119. 114 is a telephone.

The image received from the line 115 (image information from a remote terminal connected via the line) is demodulated by the receiving circuit 112, and then the CPU 117 decodes the image information and sequentially stores it in the image memory 116. Is stored. When at least one page of image is stored in the memory 116, the image of that page is recorded. CPU11
7 reads out the image information of one page from the memory 116 and sends the composited image information of one page to the printer controller 18. The printer controller 118 is C
Upon receiving the image information of one page from the PU 117, the printer 119 is controlled to record the image information of the page.

The CPU 117 is receiving the next page during recording by the printer 119.

As described above, the image is received and recorded.

[0039]

【Example】

(Example 1) A developing sleeve of the present invention was produced by forming an uneven surface by sandblasting on the surface of an aluminum drawn cylinder that serves as a developing sleeve base, and forming a resin coating layer on the uneven surface. As a developing sleeve base, a 3003 drawing pipe made of aluminum alloy manufactured by Showa Aluminum Co., Ltd. is used, and the outer diameter is 16 mm and the inner diameter of the insertion portion is 14.4 m.
m, wall thickness 0.7 mm, and length 248 mm. The sandblast treatment was performed using alundum abrasive grains. For the blasting, a general air type sandblasting machine (Fuji Seisakusho Pneumatic Blaster) was used to perform the blasting treatment under the following treatment conditions. Blast abrasive grain Alundum No. 100 Blast pressure 2.5 Kg / cm ² Treatment time 60 sec Rotation speed 20 rpm Surface roughness (Ra) 2.5 μm

For forming the coating layer, graphite fine particles,
A resin coating material containing the following carbon black fine particles was used.

Glass beads were mixed with a paint shaker and dispersed for 3 hours to form a paint. The solid content of the paint was 25%.
Then, the surface of the developing sleeve substrate was coated by an air spray method to form a coating layer. Resin: Phenolic resin 20 parts by weight Graphite: Average particle size 7 μ 9 parts by weight Carbon: Average particle size 0.2 μ 1 part by weight Solvent: IPA (isopropyl alcohol) 20 parts by weight The surface roughness of the coated sleeve after coating is Ra. 3.0 μm
Met.

A polyacetal resin (trade name: "Duraman AW-
01 "Polyplastics Co., Ltd. manufactured by injection molding. A flange (press-fitted portion outer diameter: φ14.45 mm, press-fitted portion length 3 mm) was press-fitted with a press-fitting amount of 50 μm, and a square hole-shaped recess was formed in the flanged insertion portion. (Width: 3 mm, height: 1 m
m, depth: 3 mm) 4 from the center of the flange at right angles.
The width of the tip is 3 mm and the angle is 3 with respect to the concave portion.
An abutting member 4 made of a material SKD30 at 0 ° was abutted with an entering amount of 1.5 mm, and the cylindrical end was bent in a state of conforming to the shape of the recess 2 and sheared to join the flange and the coat sleeve. A developing sleeve was produced. The length of the cut end when it was cut and bent was 0.85 mm.

Next, the deflection of the flange 1 of the developing sleeve thus obtained was measured by the method described below.

(Measurement method) A spacer having a cylindrical shape having a diameter of 8 mm and a height of 15 mm is provided between the master gauge as a reference and the developing sleeve 8 m from both ends of the developing sleeve.
At the position m, the laser beam is transmitted between the flange 1 and the master gauge while rotating the developing sleeve with these two points as fulcrums, and the distance (spacing) between the flange 1 and the master gauge is measured. The difference between the value and the minimum value was defined as the deflection of the flange 1. The sensor used at this time was a laser length measuring machine "LS-301" manufactured by Keyence.
As a result of the measurement, the runout of the flange was 12 μm.

Next, in order to evaluate the measured developing sleeve by an image, the developing sleeve was mounted on a process cartridge of a laser beam printer (trade name: LBP-SX) manufactured by Canon Inc., and the normal temperature and normal humidity (temperature 25 ° C., relative temperature). Images were printed in an environment of humidity 20%).

[Examples 2 to 5] In Example 1, the press-fit amount of the flange 1 was changed as shown in Table 3, and the runout measurement of the flange 1 and the image evaluation were performed in the same manner as in Example 1. It was The results are summarized in Table 1.

[0047]

[Table 1]

(Comparative Example 1) A flange made by injection molding a polyacetal resin (trade name: "DURACON AW-01" manufactured by Polyplastics Co., Ltd.) on the coated sleeve produced in Example 1 with a press-fitting amount of 400 µm. Press fit,
The developing sleeve in which the flange and the coat sleeve were combined was subjected to the flange deflection measurement and image evaluation in the same manner as in Example 1.

(Comparative Example 2) In Example 1, the outer diameter of the fitting portion of the flange was set to φ14.35 mm, and the flange was made of an instant adhesive (trade name: “Aron Alpha 432FT”).
W ”Toa Gosei Kagaku Kogyo Co., Ltd., adhesive amount 0.08 g), and except that it was adhered to the coat sleeve and left standing in the same environment as Example 1 for 48 hours for bonding. Similarly, the runout measurement and image evaluation of the flange 1 were performed.

(Examples 6 to 10) The developing sleeves produced in Examples 1 to 5 are installed in a process cartridge of a Canon laser beam printer (trade name: LBP-SX), and the process cartridge is heated at high temperature and high humidity. After standing in a layer (specifically, temperature 32.5 ° C., relative humidity 85%) for 48 hours, the process cartridge is installed in the laser beam printer main body in the same environment and intermittently
0000 images were printed. Further, after drawing, the developing sleeve was taken out from the process cartridge, and it was confirmed whether or not the joint between the flange and the cylinder was affected by backlash, looseness, detachment, etc. due to durability. Further, the developing sleeve after the endurance was fixed, and the bond breaking torque of the flange was measured with a commercially available torque gauge. The results are summarized in Table 4.

(Comparative Example 3) Comparative Example 1 and Comparative Example
The developing sleeve prepared in 2 was left for 48 hours in the same environment as in Examples 6 to 10 and evaluated by the same method.

The results are summarized in Table 2.

[0053]

[Table 2]

[0054]

As described above, the cylindrical member according to the present invention has the following effects. (1) In a cylindrical member having an end engaging member at least at one end of the cylinder, the end engaging member is press-fitted into the cylinder, and further, a recess is provided in a fitting portion of the end engaging member with the cylinder. Since the cylindrical member is bent and cut in close contact with the recess, it is always stable without being affected by the external environment under each environment (especially low temperature and low humidity, high temperature and high humidity). It is possible to maintain the binding force. (2) Since the end engaging member is press-fitted so that no clearance is created between the end engaging member and the cylinder, the end engaging member is not obliquely fitted to the cylinder, and the end engaging member is very tight. High-precision coupling is possible. (3) Since it is possible to connect the end engaging member and the cylinder by a very simple method of inserting the abutting member from the outer peripheral portion of the cylinder, it takes a complete curing time as in the conventional bonding method. Instead, it is possible to combine them instantly, which is advantageous in terms of productivity and cost. (4) Since no adhesive is used, it does not require property management, a drying step after bonding, a storage space, etc., and is excellent in terms of management, economy, and the like. (5) Since the coupling torque strength is not influenced by the material of the end engaging member, the material can be freely selected according to the purpose and application.

[Brief description of drawings]

1 is a cross-sectional view of a cylindrical member according to the present invention.

FIG. 2 is a partially enlarged sectional view of a recess.

FIG. 3 is a cross-sectional view of a cylindrical end portion in a cutting and bending process.

FIG. 4 is a plan view of a cylindrical end portion in a cutting and bending process.

5A-5D are cross-sectional views of end engaging members engaged with a cylindrical member according to the present invention, respectively.

FIG. 6 is an explanatory diagram of a dimensional relationship in a process of bending the end portion of the cylinder.

FIG. 7 is an explanatory diagram of a dimensional relationship of a recess of a gear or a flange.

FIG. 8 is a schematic configuration diagram of a general transfer type electrophotographic apparatus using a cylindrical member according to the present invention.

FIG. 9 is a block diagram of a facsimile using an electrophotographic apparatus using a cylindrical member according to the present invention as a printer.

[Explanation of symbols]

 1 Sleeve flange 2 Recess provided in sleeve flange 3 Cylindrical 4 Abutting member 6 Square hole punch a Entry amount b Cylinder wall thickness c Recess width d Recess height e Abutting member tip angle f Cylinder cut at shearing part Length g Square hole punch width dimension h Square hole punch height dimension

Front page continuation (72) Inventor Masahiko Yashiro, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor, adult Tanaka, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (25)

[Claims] 1. A cylindrical member having an end engaging member at least at one end of the cylinder, wherein the end engaging member is press-fitted into the cylindrical member, and the cylinder end is a cylinder having the end engaging member. A cylindrical member, characterized in that it is bent and cut into a concave portion of a portion to be inserted into an end portion, and is joined thereto. 2. The press-fitting amount of the end engaging member is 10 μm to 15 μm.
The cylindrical member according to claim 1, which has a thickness of 0 μm. 3. The cylindrical member according to claim 1, wherein the cut and bent portion of the cylindrical member is an aluminum tube having a wall thickness of 0.3 mm to 1.5 mm. 4. The cut length of the cut and bent portion of the cylindrical member is 0.2 mm or more.
Cylindrical member. 5. The cut length of the cut and bent portion of the cylindrical member is 0.4 mm or more.
Cylindrical member. 6. A cylindrical member having an end engaging member at least at one end of a cylinder having an image holding layer on its surface, wherein the end engaging member is press-fitted into the cylindrical member, and the cylindrical end is An image holding member, which is bent and cut into a concave portion of an insertion portion of an end engaging member into a cylindrical end portion. 7. The image holding member according to claim 6, wherein the image holding layer is a photoconductive layer. 8. The image holding member according to claim 6, wherein the image holding layer is an insulating layer. 9. The cylinder according to claim 7, wherein the cut and bent portion is cut with an aluminum tube having a wall thickness of 0.3 to 1.5 mm and has a length of 0.2 mm or more. Image holding member. 10. The image holding member according to claim 7, wherein the width of the concave portion of the end engaging member and the width of the end portion of the cylinder to be bent are the same. 11. The image holding member according to claim 7, wherein an image holding layer is not formed on the bent end portion of the cylindrical end portion. 12. An electrophotographic developing sleeve having an end engaging member at least at one end of the cylinder, wherein the end engaging member is press-fitted into the cylinder, and further, the cylinder end has an end engaging member. A developing sleeve for electrophotography, wherein the developing sleeve for electrophotography is bent and cut into a concave portion of a portion inserted into the cylindrical end portion of the. 13. The length of the cut and bent portion of the cylinder cut with an aluminum tube having a wall thickness of 0.3 to 1.5 mm is 0.2 mm or more.
Developing sleeve for electrophotography. 14. An electrophotographic apparatus unit in which at least one of a charging means, a developing means and a cleaning means is integrally supported together with an electrophotographic photosensitive member to form a unit, and which is a detachable single unit in an apparatus body. The photosensitive member is a cylindrical member having an end engaging member at least at one end of a cylinder having a photoconductive layer on its surface, the end engaging member being press-fitted into the cylindrical member, and the cylindrical end Is united by being bent and cut into a concave portion of an insertion portion of the end engaging member into the cylindrical end portion. 15. The cut and bent portion of the cylinder is cut by an aluminum tube having a wall thickness of 0.3 to 1.5 mm, and the length thereof is 0.2 mm or more.
Equipment unit. 16. A cylindrical member having an end engaging member on at least one end of a cylinder having a photoconductive layer on its surface,
An electrophotographic photosensitive member in which an end engaging member is press-fitted into a cylindrical member, and the cylindrical end is bent and coupled into a concave portion of a portion of the end engaging member inserted into the cylindrical end, An electrophotographic apparatus comprising: a latent image forming means, a means for developing the formed latent image, and a means for transferring the developed image to a transfer material. 17. The length of the cut and bent portion of the cylinder cut by an aluminum tube having a wall thickness of 0.3 to 1.5 mm is 0.2 mm or more.
Electrophotographic device. 18. A cylindrical member having an end engaging member at least at one end of a cylinder having a photoconductive layer on its surface,
An electrophotographic photosensitive member in which an end engaging member is press-fitted into a cylindrical member, and the cylindrical end is bent and coupled into a concave portion of a portion of the end engaging member inserted into the cylindrical end, A facsimile characterized by having an electrophotographic apparatus having a latent image forming means, a means for developing the formed latent image, and a means for transferring the developed image to a transfer material, and a receiving means for receiving image information from a remote terminal. 19. The cut and bent portion of the cylinder is cut by an aluminum tube having a wall thickness of 0.3 to 1.5 mm, and the length thereof is 0.2 mm or more.
Fax machine. 20. An apparatus in which at least one of a charging means, a developing means having a developing sleeve, and a cleaning means is integrally supported together with an electrophotographic photosensitive member to form a unit, which is a detachable single unit in an apparatus main body. In the unit, the developing sleeve is a cylindrical member having an end engaging member at least at one end of the cylinder, the end engaging member is press-fitted into the cylindrical member, and the cylindrical end is engaged with the end engaging member. An apparatus unit, characterized in that it is bent and cut into a recess of a portion of the member inserted into the cylindrical end. 21. The cut and bent portion of the cylinder is cut with an aluminum tube having a wall thickness of 0.3 to 1.5 mm, and the length thereof is 0.2 mm or more.
Equipment unit. 22. In an electrophotographic apparatus having an electrophotographic photosensitive member, a latent image forming means, a means for developing a latent image formed by using a developing sleeve, and a means for transferring the developed image to a transfer material, the developing sleeve comprises: A cylindrical member having an end engaging member at least at one end of the cylinder, wherein the end engaging member is press-fitted into the cylindrical member, and the cylinder end is connected to the cylinder end of the end engaging member. An electrophotographic apparatus, wherein the electrophotographic apparatus is bent and cut into a concave portion of an insertion portion of the. 23. The cut and bent portion of the cylinder is cut by an aluminum tube having a wall thickness of 0.3 to 1.5 mm, and the length thereof is 0.2 mm or more.
Electrophotographic device. 24. An image from an electrophotographic apparatus and a remote terminal having an electrophotographic photosensitive member, a latent image forming means, a means for developing a latent image formed using a developing sleeve, and a means for transferring the developed image to a transfer material. In a facsimile having a receiving means for receiving information, in a cylindrical member having a developing sleeve having an end engaging member at least at one end of the cylinder, the end engaging member is press-fitted into the cylindrical member, A facsimile machine, characterized in that the portion is bent and cut into a concave portion of an insertion portion of the end engaging member into the cylindrical end portion. 25. The cut and bent portion of the cylinder is cut with an aluminum tube having a wall thickness of 0.3 to 1.5 mm, and the length thereof is 0.2 mm or more.
Fax machine.