JP3032957U - Equipment for polishing developing sleeves for copiers, printers, etc. - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To polish a developing sleeve of a copying machine, a printer or the like with high accuracy and in a short time. A polishing device includes a polishing roll for polishing the outer surface of a cylindrical material, a support roll for supporting the outer surface of the cylindrical material, and an end portion of the cylindrical material having an outer diameter smaller than the inner diameter of the cylindrical material. A pair of inner surface polishing devices each including an inner surface polishing roll for polishing the inner surface are included. The polishing roll and the supporting roll are adapted to rotate in the same direction so as to support the cylindrical material, and each has an axial length larger than the axial length of the cylindrical material. Is movable so as to move toward and away from the end of the cylindrical material.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a device for polishing a developing sleeve such as a copying machine or a printer.

[0002]

[Prior art]

 A developing sleeve used in a copying machine, a printer or the like supplies toner in a toner reservoir to a photosensitive drum, and is formed by fitting a flange to one end or both ends of an aluminum tube or a stainless tube. In recent printers of copying machines and computers, it is convenient for users as a disposable unit in which a toner reservoir and a developing sleeve are integrated. Therefore, it is desirable that such a disposable unit should be as inexpensive as possible, but on the other hand, the development sleeve is required to have high precision, particularly high runout precision as the copying machine and computer become faster and the printing becomes finer. There is. In the prior art, such developing sleeves are finished by centerless polishing or outer diameter lathes.

Japanese Patent Laid-Open No. 61-180249 teaches that unevenness on the surface of the developing sleeve is made to have a predetermined surface roughness with a smoother shape by electrolytic polishing, but the runout accuracy is 10 μm or less. It does not describe what to do.

Japanese Unexamined Patent Publication No. 57-102742 discloses a grinding machine for the purpose of shortening the processing time and, as a means for solving the problem, performing the inner surface grinding and the outer surface grinding of a workpiece at the same time. However, this outer surface grinding is not performed on the entire outer surface of the workpiece, but only on the outer surface portions at both ends of the outer surface of the workpiece, and free support as in the present invention is not performed. Differently, since the work piece is supported by the bearing unit and the rotation directions of the polishing roll and the work piece are opposite to each other as shown in FIG. 5 of this publication, the grinding depth is large. It is impossible to set the runout accuracy to 10 μm or less.

In the structure described in Japanese Patent Laid-Open No. 48-7749, the workpiece is not freely supported during polishing, and the length of the polishing roll for polishing the outer surface of the workpiece in the axial direction is equal to that of the workpiece. Since the length is smaller than the length, the runout accuracy of the workpiece cannot be less than 10 μm. Furthermore, this publication does not mention the direction of rotation of the polishing roll and the workpiece.

Japanese Unexamined Patent Publication (Kokai) No. 4-93161 discloses that a plurality of polishing rolls are used to form a work into a stepped shape. When a plurality of polishing rolls are used in this way, it is extremely difficult to set the runout accuracy of the work piece to 10 μm or less. Furthermore, this publication does not describe the direction of rotation of the polishing rolls and the workpiece, nor does it teach internal polishing.

Japanese Unexamined Patent Publication No. 4-301647 discloses that the surface of an aluminum or aluminum alloy pipe material is polished by centerless polishing, but does not mention the inner surface polishing of the pipe material.

[0008]

[Problems to be solved by the invention]

 The aluminum tube or stainless tube, which is the material of the developing sleeve, generally has uneven thickness and uneven thickness, and it is not possible to achieve the runout accuracy of less than 10 μm required for the developing sleeve in the conventional production technology. It was possible, and it took a long time to finish the developing sleeve with a predetermined accuracy. The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a polishing roll for polishing the outer surface of a cylindrical material, a support roll for supporting the outer surface of the cylindrical material, and an outer diameter smaller than the inner diameter of the cylindrical material. An apparatus for polishing a developing sleeve of a copying machine, a printer or the like, which includes a pair of inner surface polishing means for respectively polishing the inner surface of an end portion of a strip-shaped material, the polishing roller and the supporting roller. Are configured to rotate in the same direction to support the cylindrical material, and the polishing roll and the support roll each have an axial length greater than the axial length of the cylindrical material. Provided is a method for polishing a developing sleeve of a copying machine, a printer, or the like, in which the inner surface polishing roll is movable so as to separate from and contact the end portion of the cylindrical material.

According to the present invention, the outer surface of the cylindrical material forming the developing sleeve is polished at the same time as the inner surfaces of both ends of the cylindrical material.

[0011]

[Embodiment of the invention]

 Referring to FIG. 1, there is shown a polishing apparatus 10 according to an embodiment of the present invention, which comprises a polishing roll 1 for polishing the outer surface of a tube material 5 such as an aluminum tube or a stainless tube, and an outer surface of the tube material 5. A rubber roll 2, a pair of inner surface polishing devices for polishing the inner surfaces of both ends of the tube material 5, a blade 8 for supporting the outer surface of the tube material 5, and a blade support frame 7 for supporting this blade. As shown in FIG. 1, the polishing roll 1 and the rubber roll 2 are adapted to rotate in the same direction. The rubber roll 2 is fixed to a support base 10a of the polishing apparatus 10, and the support base 10a moves so as to come in contact with and separate from the position-fixed polishing roll 1 to set the rubber roll 2 at a predetermined position, and the tube material Determine the final outer diameter of item 5. The blade 8 is attached to a blade support frame 7 fixed to a support base 10a of the polishing apparatus 10 as shown in FIGS. 1 and 2 so as to support the outer surface of the tube material 5 during polishing of the tube material 5. It has become. The polishing apparatus 10 has the same structure as that of the conventional polishing apparatus except for the inner surface polishing apparatus, the blade 8 and the blade supporting frame 7, and therefore the detailed description of the conventional structure will be omitted.

As shown in FIG. 2 and FIG. 3, each inner surface polishing apparatus includes an inner surface polishing roll 3 having an outer diameter smaller than the inner diameter of the tube material 5, a motor 3a for rotationally driving the inner surface polishing roll, and this motor. It includes a support frame 3c for supporting, and a cylinder 3b for moving this support frame in the axial direction of the inner surface polishing roll 3. The inner surface polishing roll 3 polishes the inner surface of the end portion of the tube material 5 over a predetermined length in the axial direction, and thus the outer surface of the tube material 5 is polished by the polishing roller 1, and the inner surfaces of both ends are respectively polished by the inner surface polishing rolls. Since it is polished at the same time by No. 3, the thickness of both ends has a predetermined accuracy. The pipe material 5 after polishing is taken out by a vacuum suction type transfer device (not shown), and then flanges are fitted into the inner surface portions of the polished both ends of the pipe material 5 by press fitting or bonding. Thus, the runout accuracy of the developing sleeve formed by fitting the flanges to both ends is 10 μm or less.

Although the aluminum tube is insufficient in hardness depending on the application of the developing sleeve, it is often used as a material of the developing sleeve because it is more advantageous in processing and cost than the stainless tube. Therefore, an aluminum tube is used as the cylindrical material, and the developing sleeve is polished by using the polishing apparatus according to the above-described embodiment, and the plating process or the coating process is performed. That is, after polishing the aluminum tube to a predetermined size by the polishing apparatus according to the above-mentioned embodiment as in the above-mentioned embodiment, plating treatment or coating treatment is performed to form a coating layer having a necessary and sufficient thickness on the aluminum pipe, and then again. The polishing apparatus according to the above embodiment polishes to a predetermined size as in the above embodiment.

[0014]

[Effect of the invention]

 The outer surface of the cylindrical material is polished simultaneously with the inner surfaces of both ends of the cylindrical material. Thus, the runout accuracy of the developing sleeve is 10 μm or less.

[Brief description of the drawings]

FIG. 1 is a side elevational view of a polishing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a part of the polishing apparatus of FIG.

FIG. 3 is an enlarged plan view of a part of the polishing apparatus of FIG.

[Explanation of symbols]

 1 Polishing Roll 1a Motor for Driving Polishing Roll 2 Rubber Roll 2a Motor for Driving Rubber Roll 3 Inner Polishing Roll 3a Motor for Driving Inner Polishing Roll 3b Cylinder 3c Support Frame for Inner Polishing Roll 5 Tube Material such as Aluminum Pipe or Stainless Steel Pipe 7 Blade support frame 8 Blade 10 Polishing device

Claims (3)

[Utility model registration claims] 1. A polishing roll for polishing the outer surface of a cylindrical material, a support roll for supporting the outer surface of the cylindrical material, and an inner surface of an end portion of the cylindrical material having an outer diameter smaller than the inner diameter of the cylindrical material. In a device for polishing a developing sleeve such as a copying machine or a printer, which includes a pair of inner surface polishing means each including an inner surface polishing roll for polishing, the polishing roll and the supporting roll are rotated in the same direction, and the cylinder The polishing roll and the support roll each have an axial length that is greater than the axial length of the cylindrical material, and the inner polishing roll is an end of the cylindrical material. A device for polishing developing sleeves of copiers, printers, etc. 2. An apparatus for polishing a developing sleeve of a copying machine, a printer or the like according to claim 1, further comprising a blade for supporting the outer surface of the cylindrical material from below. 3. An apparatus for polishing a developing sleeve of a copying machine, a printer or the like according to claim 1, wherein the support roll is a rubber roll.