JPH102323A - Flange for supporting end of rod member and magnet roller using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce material and shorting the working time, and also to widen the range of choice for materials required for a support base and a shaft by providing a shaft contact bonded to a disc-like or a bottomed cylindrical support base fitted or pressed to the end part of a rotary or non-rotary rod member by pressure contact jointing. SOLUTION: A shaft 41 is strongly pressed to the surface of a fixed support base 42 while being rotated to melt and softern both members in joint surfaces of the support base 42 and the shaft 41 by frictional heat to be mixed, thereby achieving rigid joining. A flange 42a of the support base 42 and a notch 41a of the shaft 41 are formed by cutting work, and this cutting may be performed before or after joining the shaft 41 to the support base 42. Materials used for the support base 42 and the shaft 41 may be of the same kind or different kinds. Though metal is used for the shaft 41, it is possible to use synthetic resin which can satisfy the wear resistance and working accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange for rotating a rod-shaped rotating body, and more particularly to a magnet roller incorporated in a copying machine, a facsimile, a laser printer, and the like.

[0002]

2. Description of the Related Art Magnet rollers are used in developing devices and cleaning devices incorporated in electrophotographic copying machines, facsimile machines and laser printers. As shown in FIG. 5, the magnet roller comprises a columnar magnet M penetrating through the shaft 1 and is rotatably mounted inside a cylindrical sleeve S closed at both ends by flange members 2 and 3. I have.

A shaft hole 31 is formed in one of the flange members 3 so as to penetrate the shaft 1 of the columnar magnet M and is exposed to the outside, and a shaft 21 is formed in the other flange member 2 so as to protrude. The shaft 21 is rotatably supported on one side with respect to the other, thereby enabling relative rotation between the columnar magnet M and the sleeve S. Which of the shaft 1 and the shaft 21 is the fixed side or the rotating side depends on the device design.

[0004] The entire flange member 2 is integrally formed.
And a flange 22a is formed on the outer peripheral surface of the support base 22 so as to stop against the end of the sleeve S when fitted. A bearing 23 such as a rolling bearing or a sliding bearing is incorporated in the support base 22 so that the shaft 1 of the columnar magnet M can be rotatably supported. Further, a notch 21a is formed in a part of the shaft body 21 in order to ensure transmission of the driving force.

Conventionally, such a flange member 2 is manufactured by shaving a stainless steel or aluminum round bar material 30 and adjusting the shape of the details as shown in FIG. 6A, or by using a forging die. A forged product 40 having an approximate shape as shown in FIG. 7 (a) is produced, and thereafter, a cutting process is performed to adjust the shape of the details to obtain a forged product.

[0006]

However, the round bar 3
As shown in FIG. 6 (b), shaving from zero has a problem that a large amount of waste is caused because the material in the hatched portion is discarded, and that processing takes time. On the other hand, in the method of performing cutting and finishing after forging, as shown in FIG. 7 (b), material waste is relatively small, but on the other hand, forging die fabrication cost and forging die maintenance are required, so total cost is reduced. There is a problem that does not become low. Further, in these manufacturing methods, the material of the flange member 2 is selected from those having both the characteristics required for the support base 22 and the characteristics required for the shaft body 21 in order to form the entire flange member from the beginning. However, there is a problem that the range of material selection is significantly limited.

Although the above description relates to a magnet roller, the same kind of problem is not limited to a magnet roller, but is also common to parts that support the end of a rod-shaped member by a flange so as to be rotatable or non-rotatable. It is a problem. In view of such a situation, the present invention can reduce the processing cost and the processing time, and further, does not use a forging die or the like, so that the maintenance of the die is not required, and the end portion that can be used in a wider range of materials can be selected. A supporting flange is proposed, and a magnet roller using the end supporting flange is also proposed.

[0008]

According to a first aspect of the present invention, there is provided an end support flange for supporting an end of a rotatable or non-rotatable rod-shaped body, the structure of which is formed of a rod-shaped body. It is characterized by comprising a disk-shaped or bottomed cylindrical support base fitted or abutted on the end portion, and a shaft pressed to the support base by pressure welding.

According to a second aspect of the present invention, in a magnet roller in which a columnar magnet is rotatably mounted inside a cylindrical sleeve, a flange member supporting an end of the sleeve is fitted or abutted on the end of the sleeve. It is characterized by comprising a plate or a cylindrical support base having a bottom, and a shaft body pressed to the support base by pressure welding.

The support base and the shaft may be of the same kind of metal or different kinds of metals, and one of the support base and the shaft may be of metal and the other may be of synthetic resin.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will now be described with reference to the illustrated embodiments. FIG. 1 shows a flange member 4 used for the magnet roller of the present invention. The flange member 4 has a support base 42 fitted or in contact with the end of the cylindrical sleeve and a shaft 41 protruding from the support base 42. A flange 4 is provided on the outer peripheral surface of the support base 42 so as to stop the end of the sleeve S when fitted to the sleeve S.
On the other hand, a bearing (not shown) such as a rolling bearing or a sliding bearing is built inside the support base 42. The shaft body 41 has a notch 41a for preventing idling.
Are formed. As the support base and the shaft, a simpler shape can be used. For example, as shown in FIG. 2, a disk-shaped support base 52 and a shaft 5 having no notch are provided.
1, the flange member 5 may be formed.

According to the present invention, instead of forming the flange member 4 from a round bar or using a forging die as in the related art, a shaft body and a support base are separately manufactured, and then the shaft member is formed. A method is adopted in which the two are integrated by friction welding the body to the support base.

[0013] Here, friction welding means that the materials to be joined are melted and softened by frictional heat generated at the press contact surface while sliding and pressing the two members to be joined, whereby the materials facing each other at the joint surface are mutually bonded. This is a joining method of realizing strong joining by mixing. According to this method, there is no clear boundary between the two materials after joining, and the graded material in which the content of both materials changes stepwise around the joint is realized, and the two members are completely integrated Is made. Specifically, if the flange member 4 shown in FIG.
As shown in (2), the shaft 41 is strongly pressed against the surface of the fixed support base 42 while rotating, so that the two members are melted and softened by frictional heat at the joint surface between the support base 42 and the shaft 41 and mixed. Take the technique of matching. Formation of flange 42a in support base 42 and notch 4 in shaft body 41
The formation of 1a is performed by cutting, but this processing may be performed before or after joining the shaft body 41 to the support base 42. When the flange member 5 having the simple shape shown in FIG. 2 is produced, as shown in FIG. 4, the shaft member 51 is strongly pressed against the surface of the disk-shaped support base 52 while rotating, so as to join.

The materials used for the support base and the shaft may be the same or different. As the material of the supporting base, stainless steel, aluminum,
Copper and synthetic resin can be used, while stainless steel, aluminum and copper can be used as the material of the shaft body. Specific combinations include a combination of a stainless steel shaft and a stainless steel support base, a combination of a stainless steel support base and an aluminum shaft, a combination of an aluminum support base and an aluminum shaft, and synthesis. A combination of a resin support base and a stainless steel shaft, a combination of a synthetic resin support base and an aluminum shaft, and the like can be considered. Here, metal is used for the shaft body from the viewpoint of abrasion resistance and processing accuracy, but a synthetic resin may be used as long as the abrasion resistance and processing accuracy can be satisfied. Although the above description relates to the magnet roller, the technology relating to the flange member described here can be applied to the configuration of the flange for supporting the end portion of another rod.

[0015]

According to the present invention, the flange supporting the end portion of the rod-shaped body or the magnet roller is formed by pressure-bonding the separately formed supporting base and the shaft body by the friction welding method. Compared to the case where the entire flange is cut out from a bar or the rough shape of the entire flange is formed using a forging die, material waste can be significantly reduced and the processing time can be shortened as compared with the case where detailed adjustment is performed by cutting.
In addition, since a mold is not used, the production cost is reduced without the necessity of producing a mold and maintaining the mold.

In addition, since friction welding can bond not only the same kind of material but also a different kind of material, the material selection required for the support base and the material characteristic required for the shaft body are independently evaluated to select a material. This greatly expands the range of material choices.

[Brief description of the drawings]

FIG. 1 shows a flange 1 of a magnet roller of the present invention.
Front view showing an example

FIG. 2 is a front view showing another example of the flange.

FIG. 3 is an explanatory view showing a state where a shaft body is joined to a support base by friction welding.

FIG. 4 is an explanatory view showing a state in which a shaft body is friction-welded to a support base.

FIG. 5 is a sectional view showing an outline of a magnet roller.

FIG. 6A is an explanatory view showing that a flange is cut out from a round bar, and FIG. 6B is an explanatory view showing a part of the round bar that is wasted when the flange is cut out.

FIG. 7A is an explanatory view showing that a flange is cut out from a forged product having a schematic shape manufactured using a forging die;
(B) is an explanatory view showing a forged part that is wasted when the flange is cut out.

[Explanation of symbols]

M Column-shaped magnet S Sleeve 1 Shaft 2 Flange member 21 Shaft 21a Notch 22 Support base 22a Flange 23 Bearing 3 Flange member 4 Flange member 5 Flange member 30 Round bar 31 Shaft hole 4a Flange body 40 Forging 41 Shaft 42 Support base 41a Notch 5 Flange 51 Shaft 52 Support base

Claims (4)

[Claims] An end supporting flange for supporting an end of a rotatable or non-rotating rod-shaped body, the structure of which is a disk or a bottomed cylindrical support fitted or abutted on the end of the rod-shaped body. An end supporting flange comprising a base and a shaft pressed to the supporting base by pressure welding. 2. A magnet roller in which a columnar magnet is rotatably mounted inside a cylindrical sleeve, wherein a flange member supporting an end of the sleeve is fitted with a circular plate or a disk which fits or abuts on the end of the sleeve. A magnet roller, comprising: a support body having a bottom cylindrical shape; and a shaft body press-bonded to the support body by pressure welding. 3. The magnet roller according to claim 2, wherein the support base and the shaft are made of the same metal. 4. The magnet roller according to claim 2, wherein the supporting base and the shaft body are made of different metals or one is a metal and the other is a synthetic resin.