JP5727212B2 - Flange assembly and method of manufacturing flange assembly - Google Patents

Description

  The present invention relates to a flange assembly and a method for manufacturing the flange assembly.

  A technique for fitting and attaching a flange member provided with a rotation shaft to the open end of a hollow sleeve extending along the central axis is required in the production of a developing roll used in an electrophotographic apparatus, for example. . As such a technique, Japanese Patent Application Laid-Open No. 2008-241028 and Japanese Patent Application Laid-Open No. 2009-181039 are known.

JP 2008-2441028 A JP 2009-181039 A

  In Patent Document 1 and Patent Document 2, a flange assembly including a metal first flange member and a metal second flange member provided with a drive shaft at one open end of a cylindrical sleeve is provided. The hollow roll member used for the developing roll is formed by press-fitting. A through hole having a predetermined diameter is provided at the center of the first flange member constituting the flange assembly. Further, at one end portion of the second flange member, a pressure flange portion having a diameter larger than the through hole, a column portion having a diameter smaller than the through hole, and smaller than the through hole and from the column portion. A tip flange portion having a slightly larger diameter is continuously provided so as to be coaxial with the second flange member main body.

  When the flange assembly is manufactured by connecting the first flange member and the second flange member, first, in order to prevent the first flange member from being deformed in the outer diameter direction during the connection, Place the parts in the connecting mold. And the front-end | tip flange part and pillar part of a 2nd flange member are inserted in the through-hole of a 1st flange member, and a pressurization flange part lower surface is contact | abutted to a 1st flange member upper surface. Then, the second flange member is pressed against the first flange member using a press machine. If it does so, a part of upper end part of a 1st flange member will plastically flow by a pressurization flange part, and will enter into the dent part formed between the front-end | tip flange part and a pressurization flange part. In this way, the first flange member and the second flange member are integrally connected to form a flange assembly. Accordingly, it is possible to form a flange assembly having a strong structure while suppressing the manufacturing cost.

  Here, in the flange assembly of patent document 1 and patent document 2, it is necessary to comprise both the 1st flange member and the 2nd flange member which are the structural members with a metal material. That is, as described above, in order to connect the first flange member and the second flange member, a large pressing force is applied from the pressure flange portion to the upper end portion of the first flange member, It is necessary to cause a part to be plastically flowed so much that it can enter a recess formed in the second flange member. Therefore, for example, when the first flange member is made of a resin material, it is impossible to connect the first flange member and the second flange member. This is because the resin does not have ductility as much as that of a metal, and thus cannot withstand such a large plastic deformation and breaks. As described above, according to the flange assembly described in Patent Literature 1 and Patent Literature 2, it is possible to apply the resin even when it is desirable to apply the resin to the structural member from the viewpoint of reducing the weight of the product, for example. Impossible.

  Further, in Patent Document 1 and Patent Document 2, since it is necessary to plastically flow the first flange member made of metal as described above, it is very large when connecting the first flange member and the second flange member. It is necessary to apply power. Further, in order to prevent the first flange member from being deformed in the outer diameter direction at the time of connection, a mold for suppressing the outer peripheral surface of the first flange member is required. Therefore, a large press machine or a mold for supporting each member is required as a manufacturing apparatus, leading to an increase in manufacturing equipment. As a result, the manufacturing cost increases.

  Moreover, in the flange assembly used for the above-mentioned use, the anti-extraction force which is a force required for pulling out the connected first flange member from the second flange member, and the connected first flange member as the second flange. Improving anti-rotation torque, which is a torque required for relative rotation with respect to a member, is also a major technical problem at present.

  In view of the above problems, an object of the present invention is a flange assembly that is fitted to an end portion of a sleeve, and can be applied to either a metal material or a resin material as a constituent member, and can be easily manufactured. It is an object of the present invention to provide a flange assembly capable of greatly improving the anti-extraction force and the anti-rotation torque by the structure, and a method of manufacturing such a flange assembly.

  A flange assembly according to the present invention is a flange assembly that is fitted to an end portion of a sleeve that extends long along a central axis, and includes a cylindrical portion and a first flange portion that expands from the end of the cylindrical portion. A second flange member having a first flange member, a column portion fitted into the cylindrical portion of the first flange member, and a second flange portion in surface contact with the first flange portion; Here, the second flange member has a wedge-shaped recess extending obliquely from the corner where the outer surface of the column portion intersects the second flange portion toward the central axis, and the first flange member includes the second flange portion. A wedge-shaped convex portion entering the wedge-shaped concave portion from a corner portion where the end surface of the first flange portion and the inner surface of the cylindrical portion intersect each other.

  According to this configuration, the wedge-shaped concave portion cut toward the central axis of the second flange member is engaged with the wedge-shaped convex portion provided on the first flange member so as to enter the inside of the wedge-shaped concave portion. By doing so, the first flange member and the second flange member can be firmly connected to each other. Thus, in order to pull out the first flange member from the second flange member in the axial direction, a force sufficient to deform or damage the wedge-shaped convex portion entering the inside of the wedge-shaped concave portion is required. It can be greatly improved. In addition, since the inner wall surface forming the wedge-shaped concave portion and the wedge-shaped convex portion are completely in surface contact, the contact area between the wedge-shaped concave portion and the wedge-shaped convex portion becomes relatively large. Therefore, the frictional force generated when the first flange member is rotated relative to the second flange member with respect to the central axis is increased. That is, the rotational torque can be improved. Further, as described above, the first flange member and the second flange member are connected to each other by the engagement of the wedge-shaped convex portion and the wedge-shaped concave portion, and thus the structure is extremely simple. Therefore, it is possible to easily manufacture the flange assembly.

  Preferably, the first flange member is made of resin, and the second flange member is made of metal. That is, in the flange assembly according to the present invention, the connection between the first flange member and the second flange member is realized by the wedge-shaped concave portion and the wedge-shaped convex portion that enters the wedge-shaped concave portion as described above. Therefore, even if the first flange member is made of a resin material, the first flange member and the second flange member can be effectively connected. That is, according to the present invention, any of metal and resin can be applied as a component member of the flange assembly. Therefore, the flange assembly can be applied to a wider range of uses. Moreover, since a 1st flange member and a 2nd flange member can be connected with a smaller press-contact force, the enlargement of manufacturing equipment can be avoided. Therefore, the manufacturing cost can be reduced.

  Preferably, the wedge-shaped concave portion and the wedge-shaped convex portion are provided so as to be continuous over the entire circumference of the flange assembly. According to this configuration, since the area of the engaging portion between the wedge-shaped concave portion and the wedge-shaped convex portion is further increased, the removal resistance and the rotational torque can be further improved.

  Preferably, a knurling process is provided on the outer surface of the column portion. According to this configuration, since the inner surface of the cylindrical portion of the first flange member and the knurling process provided on the second flange member column portion are engaged and connected, it is possible to further improve the removal resistance and the rotation resistance. it can.

  In another aspect of the present invention, there is provided a method of manufacturing a flange assembly that is fitted to an end of a sleeve that extends long along a central axis, and includes a cylindrical portion having a central hole, and a diameter expanding from the end of the cylindrical portion. A step of preparing a first flange member having a first flange portion and a truncated cone portion that is formed on an end surface of the first flange portion and surrounds the center hole; a column portion; and a diameter that is expanded from an end of the column portion. A step of preparing a second flange member having two flange portions, and a wedge-shaped recess extending obliquely from the corner portion where the outer surface of the column portion of the second flange member intersects the second flange portion toward the central axis Inserting the column portion of the second flange member into the center hole of the first flange member, bringing the truncated cone portion of the first flange member into contact with the wedge-shaped recess, Press toward the flange member to deform the truncated cone and wedge And a step of connecting the first flange member and second flange member by filling the recess.

  According to this configuration, the wedge-shaped concave portion that receives the truncated cone portion of the first flange member is formed to extend obliquely toward the center direction. That is, the wedge-shaped recess has a shape that allows the truncated cone portion of the first flange member to be more smoothly guided to the inside of the wedge-shaped recess when the first flange member is pressed toward the second flange member. Have. Therefore, it is possible to connect the first flange member and the second flange member with a smaller pressure contact force. Thereby, since the enlargement of manufacturing equipment can be avoided, manufacturing cost can be reduced. Further, when the first flange member and the second flange member are connected, the truncated cone portion is deformed into a wedge shape, and enters the wedge-shaped concave portion without a gap. As a result, the first flange member and the second flange member are firmly connected to each other. Accordingly, it is possible to greatly improve the resistance against extraction and the torque against rotation between the first flange member and the second flange member.

  Preferably, the first flange member is made of resin, and the second flange member is made of metal. That is, since the flange assembly according to the present invention includes the above-described connection structure, the resin material is applied to the first flange member positioned between the sleeve to which the flange assembly is fitted and the second flange member. It becomes possible to do. Therefore, it becomes possible to deal with a wider range of applications. In addition, since the first flange member and the second flange member can be connected with an extremely small pressure contact force, an increase in the size of the manufacturing equipment can be avoided. Therefore, the manufacturing cost can be reduced.

  According to the present invention, since the connection between the first flange member and the second flange member is realized by the wedge-shaped concave portion and the wedge-shaped convex portion that enters the wedge-shaped concave portion, as a component member of the flange assembly, Either metal or resin can be applied. In addition, the removal resistance required to pull the first flange member from the second flange member in the axial direction and the rotation resistance torque required to rotate the first flange member relative to the second flange member are greatly increased. Can be improved. Furthermore, since the connection between the first flange member and the second flange member is realized by an extremely simple structure, the flange assembly can be easily manufactured.

The external view of a roll member is shown. Sectional drawing of the roll member shown in FIG. 1 is shown. It is the figure which looked at the flange assembly which concerns on one Embodiment of this invention from the outer-diameter direction, Comprising: (a) shows an external view, (b) shows sectional drawing. It is a figure which shows the 1st flange member shown in FIG. 3, Comprising: It is a figure corresponding to FIG. It is a figure which shows the 2nd flange member shown in FIG. 3, Comprising: It is a figure corresponding to FIG. The flowchart of the manufacturing method of the flange assembly which concerns on one Embodiment of this invention is shown. It is the figure which looked at the 1st flange member manufactured by the 1st flange member preparation process from the outer diameter direction, Comprising: (a) shows an external view and (b) shows sectional drawing. It is the figure which looked at the 2nd flange member manufactured by the 2nd flange member preparation process from the outer diameter direction, Comprising: (a) shows an external view, (b) shows sectional drawing. It is sectional drawing which shows the state after the positioning process of a 1st flange member and a 2nd flange member. It is the photograph which looked at the cross-sectional shape of the flange assembly 11 manufactured by the manufacturing method which concerns on one Embodiment of this invention from the outer-diameter direction. It is the photograph which expanded the area | region XI in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the roll member 101 provided with the flange assembly 11 which concerns on one Embodiment of this invention is demonstrated using FIG. 1 and FIG. FIG. 1 shows an external view of a roll member 101 provided with a flange assembly 11 according to an embodiment of the present invention. FIG. 2 is a sectional view of the roll member 101 shown in FIG.

  Referring to FIGS. 1 and 2, a flange assembly 11 according to an embodiment of the present invention is fitted into an open end of a hollow sleeve 102 provided in a roll member 101 and extending in the axial direction. It is a flange-shaped member. The roll member 101 having such a configuration can be applied to, for example, a developing roll used in an electrophotographic apparatus.

  The flange assembly 11 is fitted by press-fitting into an opening 103 provided at the other axial end of the sleeve 102. That is, the relative rotation of the flange assembly 11 with respect to the sleeve 102 is regulated by the frictional force generated on the contact surfaces. A shaft, which will be described later, is integrally formed at the other axial end of the flange assembly 11 so as to protrude toward the other axial end. For example, when the roll member 101 is used as a developing roll of an electrophotographic apparatus, this shaft becomes a shaft member that is locked to the electrophotographic apparatus main body side. That is, the flange assembly 11 according to the present embodiment has a function of mechanically coupling the sleeve 102 and the other member so that the sleeve 102 is fixed to the other member to which the flange assembly 11 is locked. doing.

  Next, the configuration of the flange assembly 11 according to an embodiment of the present invention will be described with reference to FIGS. 3A and 3B are views of the flange assembly 11 according to an embodiment of the present invention as viewed from the outer diameter direction, wherein FIG. 3A is an external view and FIG. 3B is a cross-sectional view. FIG. 4 is a view showing the first flange member 12 shown in FIG. 3 and corresponding to FIG. FIG. 5 is a view showing the second flange member 13 shown in FIG. 3 and corresponding to FIG.

  3 to 5, a flange assembly 11 according to an embodiment of the present invention includes an annular first flange member 12 and a circular second flange that is inserted and fixed to the first flange member 12. And a member 13.

  In a state where the first flange member 12 according to the present embodiment is connected to the second flange member 13, a cylindrical tube portion 14 that extends along the axial direction, and an end portion on the other side in the axial direction of the tube portion 14. The first flange portion 15 that expands in diameter and the wedge-shaped convex portion 17 provided so as to protrude in a wedge shape from the end surface 16 on the other axial side of the first flange portion 15 toward the second flange member 13. . In the present embodiment, the first flange member 12 is made of a resin material.

  The wedge-shaped convex portion 17 has a wedge-shaped annular convex portion that extends obliquely toward the central axis O from a corner region where the end surface 16 of the first flange portion 15 and the inner peripheral surface 18 of the cylindrical portion 14 intersect. In this case, the entire circumference is continuous around the central axis O. More specifically, the wedge-shaped convex portion 17 includes an annular surface 19 extending obliquely from the other axial end 18 e of the inner peripheral surface 18 of the cylindrical portion 14 toward the central axis O, and the first flange portion 15. The end surface 16 is formed of an annular surface 20 extending obliquely from the inner diameter side end 16e toward the central axis O and intersecting the surface 19 so as to form an acute angle.

  The second flange member 13 includes a columnar column portion 21 that is fitted into the cylindrical portion 14 of the first flange member 12, a second flange portion 22 that expands from the other end portion in the axial direction of the column portion 21, The shaft 26 protrudes from the end surface 25 on the other axial side of the second flange portion 22 to the other axial direction along the central axis, and from the end surface 23 on the one axial side of the second flange portion 22 to the second flange portion 22. And a wedge-shaped recess 24 cut inward. In the present embodiment, the second flange member 13 is made of a metal material.

  The column portion 21 is a columnar member having a diameter slightly larger than the center hole of the first flange member 12. Further, a knurled portion 28 is provided in the region below the outer peripheral surface 27 of the column portion 21 over the entire circumference of the outer peripheral surface 27. As shown in FIG. 3, in a state where the first flange member 12 and the second flange member 13 are connected, the column portion 21 is press-fitted into the cylindrical portion 14 of the first flange member 12.

  The shaft 26 is a cylindrical member that protrudes from the end face 25 of the second flange portion 22 toward the other side in the axial direction, and is provided concentrically with the central axis O. As described above, the shaft 26 becomes a member that is locked to the electrophotographic apparatus main body side when the shaft 26 is incorporated into the electrophotographic apparatus main body, for example. Therefore, the shaft 26 may further include a notch or a protrusion for engaging with the electrophotographic apparatus main body.

  The wedge-shaped recess 24 according to the present embodiment has a V-shaped annular section extending obliquely from the corner region where the outer peripheral surface 27 of the column portion 21 intersects with the end surface 23 of the second flange portion 22 toward the central axis O. It is a recessed part and continues around the central axis O over the entire circumference. More specifically, the wedge-shaped recess 24 includes an annular surface 29 that extends obliquely from the other axial end 28e of the knurled portion 28 provided in the column portion 21 toward the central axis O, and a second flange. The end surface 23 of the portion 22 is formed of an annular surface 30 extending obliquely from the inner diameter side end 23e toward the central axis O and intersecting the surface 29 so as to form an acute angle.

  As shown in FIG. 3, the flange assembly 11 is configured by connecting a first flange member 12 and a second flange member 13 to each other via a wedge-shaped convex portion 17 and a wedge-shaped concave portion 24. . In this state, the wedge-shaped convex portion 17 provided on the first flange member 12 enters so as to fill the inside of the wedge-shaped concave portion 24 provided on the second flange member 13. That is, the surfaces 19 and 20 constituting the wedge-shaped convex portion 17 and the surfaces 29 and 30 constituting the wedge-shaped concave portion 24 are in surface contact. Further, as described above, both the wedge-shaped convex portion 17 and the wedge-shaped concave portion 24 are formed so as to extend obliquely toward the central axis O. Therefore, in the coupled state shown in FIG. Of the second flange member 13 enters the inner diameter side from the outer peripheral surface 27 of the column portion 21 of the second flange member 13 by a distance d.

  Thus, the first flange member 12 and the second flange member 13 are firmly connected to each other when the wedge-shaped convex portion 17 and the wedge-shaped concave portion 24 are engaged. Therefore, in order to pull out the first flange member 12 from the second flange member 13 in the axial direction, a force sufficient to deform or break the wedge-shaped convex portion 17 entering the inside of the wedge-shaped concave portion 24 is required. The removal resistance as the assembly 11 can be greatly improved.

  Further, as described above, the surfaces 19 and 20 constituting the wedge-shaped convex portion 17 and the surfaces 29 and 30 constituting the wedge-shaped concave portion 24 are completely in surface contact. Furthermore, since the column part 21 is press-fitted in the cylinder part 14, the outer peripheral surface 27 of the column part 21 and the inner peripheral surface 18 of the cylinder part 14 are press-contacted over substantially the whole region. Therefore, the frictional force generated when the first flange member 12 is rotated relative to the second flange member 13 with respect to the central axis is increased. That is, the rotational torque resistance as the flange assembly 11 can be improved.

  Furthermore, in the present embodiment, the knurled portion 28 is provided on the outer peripheral surface 27 of the column portion 21 as described above. With this configuration, in a state where the first flange member 12 and the second flange member 13 are connected, the inner peripheral surface 18 of the cylindrical portion 14 and the knurled portion 28 are engaged and connected. Accordingly, it is possible to further improve the anti-extraction force and anti-rotation torque.

  Thus, the flange assembly 11 according to the present embodiment can effectively improve both the anti-extraction force and the anti-rotation torque by providing the above-described configuration. Here, as described above, for example, when the flange assembly 11 is used in the electrophotographic apparatus as the roll member 101 shown in FIGS. 1 and 2, the flange assembly 11 has the sleeve 102 on the electrophotographic apparatus main body side. It has the function to connect mechanically so that it may fix. Therefore, since the flange assembly 11 according to the present embodiment has excellent removal resistance and rotational resistance, the sleeve 102 can be stably fixed to the electrophotographic apparatus main body side in the use state of the electrophotographic apparatus. Can do.

  In the flange assembly 11 according to the present embodiment, the first flange member 12 and the second flange member 13 are connected to the wedge-shaped recess 24 and the wedge-shaped recess 24 as described above. Since it implement | achieves by the part 17, even if it comprises the 1st flange member 12 with the resin material, the 1st flange member 12 and the 2nd flange member 13 can be connected effectively. This will be described later.

  Thus, according to the present embodiment, any of metal and resin can be applied as the constituent member of the flange assembly 11. Therefore, the flange assembly 11 can be applied to a wider range of uses.

  In some cases, after the flange assembly 11 is fixed to the sleeve 102, a coating material is applied onto the sleeve 102, and then the sleeve 102 is heat-treated in order to thermally cure the coating material. In such a case, since the flange assembly 11 according to the present embodiment has the connection structure as described above, it is possible to prevent a drop in the removal resistance and the rotation resistance due to the heat treatment. This will be described below. Here, as a comparison object with respect to the present embodiment, the columnar portion of the second flange member 13 is provided in the cylindrical portion 14 of the first flange member 12 without providing the wedge-shaped convex portion 17 and the wedge-shaped concave portion 24 in the flange assembly. Consider a case in which the first flange member 12 and the second flange member 13 are connected by a structure in which 21 is press-fitted.

  In such a flange assembly, the first flange member 12 and the second flange member 13 are connected only by a frictional force acting between the column portion 21 and the cylindrical portion 14. When such a flange assembly is heat-treated, the degree of expansion of the first flange member 12 is increased by the difference in thermal expansion coefficient between the first flange member 12 made of resin and the second flange member 13 made of metal. The second flange member 13 will be exceeded. Thereby, the frictional force which acts between the cylinder part 14 of the 1st flange member 12 and the 2nd flange member 13 pillar part 21 will fall. That is, the anti-extraction force and anti-rotation torque between the first flange member 12 and the second flange member 13 are significantly reduced.

  On the other hand, in the flange assembly 11 according to the present embodiment, even if the first flange member 12 expands relative to the second flange member 13 due to the heat treatment, the wedge-shaped convex portion 17 is the wedge-shaped concave portion. The state of entering the inside of 24 is maintained. Therefore, even after the heat treatment, since the wedge-shaped convex portion 17 entering the inside of the wedge-shaped concave portion 24 is firmly locked, the anti-extraction force between the first flange member 12 and the second flange member 13 and It is possible to prevent the rotational torque from decreasing.

  Next, the manufacturing method of the flange assembly 11 which concerns on one Embodiment of this invention is demonstrated using FIGS. FIG. 6 shows a flowchart of a method for manufacturing the flange assembly 11 according to an embodiment of the present invention. 7A and 7B are views of the first flange member 12 manufactured by the first flange member preparation step as seen from the outer diameter direction, where FIG. 7A shows an external view and FIG. 7B shows a cross-sectional view. FIGS. 8A and 8B are views of the second flange member 13 manufactured by the second flange member preparation step as seen from the outer diameter direction, in which FIG. 8A shows an external view and FIG. 8B shows a cross-sectional view. FIG. 9 is a cross-sectional view showing a state after the positioning process of the first flange member 12 and the second flange member 13.

  With reference to FIGS. 6-9, the manufacturing method of the flange assembly 11 which concerns on one Embodiment of this invention WHEREIN: The process (A) which prepares the 1st flange member 12, and the process which prepares the 2nd flange member 13 (B), a step (C) of forming a wedge-shaped recess 24 in the second flange member 13, a step (D) of bringing the first flange member 12 into contact with the second flange member 13, and the first flange member 12 (E) which presses and connects to the 2nd flange member 13.

  In the step (A) of preparing the first flange member 12, the first flange member 12 shown in FIG. 7 is formed. The first flange member 12 includes a cylindrical tube portion 14, a first flange portion 15 that expands from the other axial end of the tube portion 14, and an end surface 16 on the other axial side of the first flange portion 15. And a truncated cone part 17p protruding to the other side in the axial direction. In this step (A), the first flange member 12 is manufactured by, for example, cutting, pressing, or molding. In addition, the truncated cone part 17p formed by the process (A) is provided so as to have an inner peripheral surface 18 common to the cylindrical part 14 and is tapered toward the tip from the viewpoint of easy manufacture. It is formed into a shape.

  In the step (B) of preparing the second flange member 13, the second flange member 13 shown in FIG. 8 is formed. The second flange member 13 includes a columnar column 21, a second flange 22 that expands from the other axial end of the column 21, and an end surface 25 on the other axial side of the second flange 22. And a shaft 26 protruding to the other side in the axial direction. In this step (B), the second flange member 13 is manufactured by, for example, cutting, pressing, molding, or the like.

  Next, in the step (C) of forming the wedge-shaped concave portion 24, the second flange member 13 shown in FIG. 8 is directed from the end surface 23 of the second flange portion 22 toward the inside of the second flange portion 22. A wedge-shaped recess 24 is formed. More specifically, the wedge-shaped concave portion 24 is formed by being obliquely cut from the corner portion where the outer peripheral surface 27 of the column portion 21 and the end surface 23 of the second flange portion 22 intersect toward the central axis. In the present embodiment, the wedge-shaped recess 24 is provided so as to be continuous over the entire circumference around the central axis. The wedge-shaped recess 24 is formed by, for example, a lathe process. Next, a knurled portion 28 is provided in a region below the outer peripheral surface 27 of the column portion 21 so as to extend over the entire circumference of the outer peripheral surface 27. As a result, the second flange member 13 shown in FIG. 5 is formed.

  Next, in the step (D) of bringing the first flange member 12 into contact with the second flange member 13, the first flange member 12 is fitted into the center hole of the second flange member 13, and the first flange member 12 and the second flange member 12 are fitted together. It arrange | positions so that the flange member 13 may contact | abut. Specifically, the column portion 21 of the second flange member 13 is press-fitted into the center hole of the first flange member 12 from the side where the truncated cone portion 17p is provided. Then, the truncated cone portion 17 p of the first flange member 12 is brought into contact with the wedge-shaped recess 24 of the second flange member 13. If it does so, the 1st flange member 12 and the 2nd flange member 13 will be in the state shown in FIG.

  Next, in the connection step (E) of the first flange member 12 and the second flange member 13, the first flange member 12 is pressed toward the second flange member 13 from the state shown in FIG. Then, the tip of the truncated cone part 17p is guided to the inside of the wedge-shaped recess 24 by the inclined surface 30 constituting the wedge-shaped recess 24. Then, the truncated cone portion 17p is deformed so as to fill the inside of the wedge-shaped concave portion 24. Finally, the inside of the wedge-shaped concave portion 24 is completely filled, and the truncated cone portion 17p is formed into the wedge-shaped convex portion shown in FIG. It is deformed into the shape of the part 17. Then, the end face 16 of the first flange member 12 and the end face 23 of the second flange member 13 are in surface contact. Thus, the first flange member 12 and the second flange member 13 are in the state shown in FIG. 3, and are connected to each other via the wedge-shaped convex portion 17 and the wedge-shaped concave portion 24. As a result, the flange assembly 11 is formed.

  A photograph of the flange assembly 11 manufactured by such a method is shown in FIGS. FIG. 10 is a photograph showing a cross section of the flange assembly 11 manufactured by the manufacturing method according to one embodiment of the present invention. FIG. 11 is an enlarged photograph of the region XI in FIG. With reference to FIGS. 10 and 11, according to the method for manufacturing the flange assembly 11 according to the present embodiment, the wedge-shaped convex portion 17 provided on the first flange member 12 is provided on the second flange member 13. It can be seen that the wedge-shaped recess 24 has entered the interior so as to be completely filled.

  According to the method for manufacturing the flange assembly 11 according to the present embodiment, since the above-described configuration is provided, it is possible to apply resin to the constituent members, and to significantly reduce the manufacturing cost compared to the conventional case. Can do. This will be described below.

  In the present embodiment, in the step (B), the truncated cone portion 17p of the first flange member 12 is provided in a truncated cone shape that tapers toward the tip, and in the step (C), The wedge-shaped recess 24 of the two flange member 13 is formed so as to extend obliquely toward the central axis. Then, in the step (D), the truncated cone part 17p is deformed to enter the wedge-shaped recess 24. Here, since the truncated cone part 17p and the wedge-shaped recessed part 24 have the above-mentioned shape, the structure in which the truncated cone part 17p is easily guided to the inside of the wedge-shaped recessed part 24 along the inclined surface 30 of the wedge-shaped recessed part 24. It has become. Furthermore, the degree of deformation that deforms from the shape of the truncated cone portion 17p shown in FIG. 9 to the shape of the wedge-shaped convex portion 17 shown in FIG. 3 is relatively small. Therefore, even if the first flange member 12 is made of resin and the truncated cone part 17p is deformed as described above, the degree of deformation can be reduced, so that the truncated cone part 17p does not break. That is, according to the present embodiment, even if the first flange member 12 is made of a resin material, the first flange member 12 and the second flange member 13 can be firmly connected by having the connection structure. Is possible.

  Thus, according to the present embodiment, any of metal and resin can be applied as the constituent member of the flange assembly 11. Therefore, the flange assembly 11 can be applied to a wider range of uses.

  Moreover, by applying resin to the first flange member 12, in the step (D), it is possible to connect the first flange member 12 and the second flange member 13 with a smaller pressure contact force. Accordingly, an increase in the size of the manufacturing facility can be avoided, so that the manufacturing cost can be reduced.

  Further, as described above, the first flange member 12 and the second flange member 13 connected in this manner are firmly locked by the wedge-shaped convex portion 17 that has entered the inside of the wedge-shaped concave portion 24. The extraction force and the anti-rotation torque can be improved.

  In addition, in said embodiment, the case where it applied to the roll member used for an electrophotographic apparatus was demonstrated as one use of the flange assembly which concerns on this invention. However, the flange assembly according to the present invention can be advantageously applied to all flange-like members used by being fitted into the open end of the hollow sleeve.

  Moreover, in said embodiment, although the case where the 1st flange member was comprised with resin was described, you may comprise not only this but with a metal. Even in this case, the wedge-shaped convex portion and the wedge-shaped concave portion having the above-described shape can improve the anti-extraction force and anti-rotation torque, reduce the pressure contact force required for connecting the first flange member and the second flange member, etc. An effect can be obtained.

  In the above embodiment, the first flange member and the second flange member are connected by a wedge-shaped convex portion and a wedge-shaped concave portion provided so as to be continuous over the entire circumference of the flange assembly. However, the present invention is not limited to this, and a claw portion protruding at any one of the first flange member and the second flange member, and a recess formed in the other member so as to receive the claw portion. The first flange member and the second flange member may be connected by the engagement. Moreover, although this uneven | corrugated | grooved part is preferable from a viewpoint of manufacture easily, it is preferable that it is a cross-sectional wedge shape, but not only this but what kind of uneven | corrugated shape may be sufficient if it can engage with each other.

  In the above embodiment, the case where the first flange member is provided with the through hole that receives the column portion of the second flange member is described. It may be a non-through hole.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

  The present invention provides a flange assembly that has excellent resistance to extraction and rotational torque and that can reduce costs, and is advantageous in the production of developing rolls used in, for example, electrophotographic apparatuses. Used for

  11 flange assembly, 12 first flange member, 13 second flange member, 14 tube portion, 15 first flange portion, 16, 18, 19, 20, 23, 25, 27, 29, 30 surface, 17 wedge-shaped convex Part, 17p frustoconical part, 16e, 18e, 23e, 28e end part, 21 pillar part, 22 second collar part, 24 wedge-shaped recessed part, 26 shaft, 28 knurled part, 101 roll member, 102 sleeve, 103 opening .

Claims (6)

A flange assembly fitted to an end of a sleeve extending long along a central axis,
A first flange member having a tubular portion and a first flange portion that expands from the end of the tubular portion;
A second flange member having a column part fitted into the cylindrical part of the first flange member and a second flange part in surface contact with the first flange part;
Said second flange member, the wedge-shaped recess the outer surface of the pillar portion and said second flange portion extends obliquely Me toward the central axis from the corner crossing, are formed so as to intersect surface is an acute angle Have
The first flange member has a wedge-shaped protrusion that is deformed into the wedge-shaped recess from a corner portion where the end surface of the first flange portion that is in surface contact with the second flange portion intersects the inner surface of the cylindrical portion. A flange assembly having a portion.   The flange assembly according to claim 1, wherein the first flange member is made of resin, and the second flange member is made of metal.   The flange assembly according to claim 1 or 2, wherein the wedge-shaped concave portion and the wedge-shaped convex portion are provided so as to be continuous over the entire circumference of the flange assembly.   The flange assembly according to any one of claims 1 to 3, wherein a knurling process is provided on an outer surface of the column portion. A method of manufacturing a flange assembly fitted to an end of a sleeve extending long along a central axis,
A first flange member having a cylindrical portion having a central hole, a first flange portion that expands from an end of the cylindrical portion, and a truncated cone portion that is formed on the end surface of the first flange portion and surrounds the central hole. The process of preparing
Preparing a second flange member having a column part and a second flange part that expands from the end of the column part;
Forming a wedge-shaped recess extending obliquely from the corner portion where the outer surface of the column portion of the second flange member intersects the second flange portion toward the central axis;
Fitting the column portion of the second flange member into the center hole of the first flange member and bringing the truncated cone portion of the first flange member into contact with the wedge-shaped recess;
Connecting the first flange member and the second flange member by pressing the first flange member toward the second flange member, deforming the truncated cone portion and filling the wedge-shaped recess; And a method of manufacturing a flange assembly.   The method of manufacturing a flange assembly according to claim 5, wherein the first flange member is made of resin, and the second flange member is made of metal.