JPH06206642A - Manufacture of frictional rotary body - Google Patents

Abstract

PURPOSE:To provide a frictional rotary body manufacturing method which is excellent in productivity and processability. CONSTITUTION:In the case of manufacturing a frictional rotary body which has plural metallic disks 1 having a recessed and projecting shape in the whole area on the outer peripheral surface and a small diameter synthetic resin layer interposed in space defined between the respective metallic disks, the metallic disks are molded by press work, and after the respective metallic disks are arranged at constant intervals in a die 6, a synthetic resin material 4a is filled in the space 5 defined between the respective metallic disks, and the synthetic resin layer is molded by the synthetic resin material. Thereby, only by filling the synthetic resin material in the space of the respective metallic disks arranged in the die, the synthetic resin layer can be interposed between the respective metallic disks by cooling and coagulating the synthetic resin material, and at the same time, the respective metallic disks can be connected/fixed automatically to each other. Since the synthetic resin material is contracted naturally when it is cooled and coagulated, even if aftertreatment is not applied at all, the synthetic resin layer can be made automatically into a smaller diameter than the metallic disks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various types such as a friction roller used as a paper feeding means in a paper feeding device of OA equipment or a friction pulley used in a belt type power transmission device. The present invention relates to a method for manufacturing a friction rotating body used for various purposes.

[0002]

2. Description of the Related Art As a conventional friction roller for a sheet feeding device, there is one disclosed in Japanese Utility Model Laid-Open No. 61-59247. The conventional roller forms a plurality of recessed grooves at regular intervals on the outer peripheral surface of the roller body by cutting, and then, similarly to the remaining outer peripheral surface in which the respective recessed grooves are not formed. A concavo-convex shape is continuously formed by cutting, and a frictional force can be generated between the outer peripheral surface of the roller body and the paper by the effect of the concavo-convex shape.

However, in this conventional roller, the cutting process for forming the concave groove and the cutting process for forming the concave-convex shape are separately required as separate steps on the outer peripheral surface of the roller body. Or, since the cutting process in each of the steps is an extremely complicated work that requires precision, the manufacturing process for the roller body becomes very difficult, and there is a big problem that productivity is poor. There is.

Therefore, paying attention to such a point, for example, Japanese Utility Model Laid-Open No. 54-126392 and Japanese Patent Laid-Open No. 61-16645.
A separate molding type roller shown in Japanese Patent No. 4 is also proposed. Although each of these rollers has some structural differences, it is basically composed of an independent part in which the large-diameter portion having the above-mentioned concavo-convex shape and the small-diameter portion in which the groove is formed are separately molded. Then, the respective independent components are arranged in a sandwich form.

[0005]

Therefore, under such a separate mold roller, at least as in the conventional roller described above, the outer peripheral surface of the roller body is recessed at regular intervals by complicated cutting work. Since it is not necessary to form a groove, this has the advantage that one step of cutting can be omitted, but on the other hand, the above-mentioned independent parts are alternately arranged on the shaft to separate the independent parts from each other. Since it is necessary to connect and fix it by using an appropriate means, this complicated assembly work is newly required, and a sharp sawtooth shape is cut for the independent part corresponding to the large diameter part. Since it was necessary to give it by processing or to implant a large number of needles with high precision, it was not possible to expect much improvement in workability as a whole. In this case,
Use metal ones for the independent parts corresponding to the large diameter part,
Needless to say, even if a synthetic resin component is used as the independent component corresponding to the small-diameter portion, the same problem will occur.

[0006]

The present invention was developed in order to effectively solve the problems of these conventional manufacturing methods, and has an uneven shape on the entire outer peripheral surface in the axial direction of the rotating body. Assuming a manufacturing method for manufacturing a friction rotor including a plurality of metal discs arranged at intervals and a small-diameter synthetic resin layer interposed in a space defined between the metal discs. After molding the metal discs having the above-mentioned concavo-convex shape by press working and arranging the metal discs at regular intervals in a mold, the metal discs are formed in a space defined between the metal discs. A configuration is adopted in which a synthetic resin material is filled and the synthetic resin layer is molded with the synthetic resin material.

[0007]

According to the present invention, therefore, a metal disk having an uneven shape is formed by a pressing process that is simpler than a cutting process, and the metal disks are arranged in the mold at regular intervals. Then, by simply filling the synthetic resin material in the space defined between the metal disks, the synthetic resin layer can be interposed between the metal disks by cooling and solidifying the synthetic resin material. ,
Since the metal disks can be automatically connected and fixed to each other, the rotary body can be manufactured very easily. Moreover, since the filled synthetic resin material shrinks spontaneously during cooling and solidification, the synthetic resin layer can be made more automatically than the metal disk without any post-processing by positively utilizing this phenomenon. Since it is possible to reduce the diameter, it is possible to expect great improvement in workability and productivity from this point as well, as compared with the conventional manufacturing method.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an illustrated embodiment. In the manufacturing method according to the embodiment, as shown in FIG. Board 1
Are arranged at a constant interval with respect to the axial direction of the body of the rotating body, while the synthetic resin layer 4 having a diameter slightly smaller than that of the metal discs 1 is provided in the space defined between the metal discs 1. A friction rotating body capable of producing a large frictional force at each metal edge portion of the uneven shape 2 of the metal disk 1 which is to be protruded outward from each synthetic resin layer 4 via It is something to do.

Explaining this concretely, this embodiment is as follows.
Paying attention to forming the metal disc 1 by press working, as shown in FIG. 2, at the time of the press forming, the uneven shape 2 formed on the entire outer peripheral surface of the metal disc 1 and the metal disc 1 are formed. All of them are integrally molded, including the spacer 3 which projects to one side of the center of the shaft 1 and also serves as a shaft insertion hole. Therefore, according to the present embodiment, the metal disk 1 having the concave-convex shape 2 and the protruding spacer 3 integrally formed can be formed extremely easily and accurately in one press working step. However,
Although not specifically shown, it is also optional to form the spacer 3 separately from the metal disc 1 by integrally forming only a shaft insertion hole in the center of the metal disc 1. still,
It is preferable that the press-formed metal disc 1 is subjected to a treatment such as quenching or nitriding ion plating to increase the hardness of at least the outer peripheral concave-convex shape 2 portion of each metal disc 1. .

After the metal disk 1 is press-molded, as shown in FIG. 3A, for example, the plurality of metal disks 1 are projected into the mold 6 for insert molding. Spacers are arranged in order at intervals of 3 minutes, and then, as shown in B of FIG.
When the synthetic resin material 4a is filled therein, the synthetic resin layer 4 is interposed between the metal discs 1 due to the cooling and solidification of the synthetic resin material 4a. Immediately connected and fixed via the resin layer 4.
Moreover, since the synthetic resin layer 4 naturally shrinks during cooling and solidification as shown in FIG. 4, it is possible to automatically utilize the metal circle without any post-processing by positively utilizing such a phenomenon. The diameter is slightly smaller than the diameter of the plate 1, and only the concave-convex shape 2 portion of the metal disc 1 is projected outward in a relative relationship.

After the synthetic resin layer 4 is interposed, a high hardness plating layer may be attached to the uneven portion 2 of the metal disk 1 protruding outward by a chemical plating method. Is optional.

[0012]

As described above, according to the manufacturing method of the present invention, by adopting the above-mentioned configuration, the complicated cutting work for individually forming the concave groove and the uneven shape on the outer peripheral surface of the rotating body main body, Since the work of alternately arranging the independent parts one by one on the shaft and connecting and fixing the independent parts with each other by using an appropriate means is completely unnecessary, comparing with these conventional ones,
We can expect great improvements in workability and productivity. Moreover, the structure in which a small-diameter synthetic resin layer is interposed in the space defined between the metal discs by utilizing the cooling and solidification is, in addition to improving the workability and productivity, It is possible to effectively generate a frictional force due to the uneven shape of the above, and it is also useful for reducing the weight of the rotating body itself. Furthermore, the friction rotor manufactured according to the present invention has a dimension of the rotor main body that is adjusted by increasing or decreasing the number of metal disks and adjusting the width of the space defined between the metal disks during manufacturing. Since it can be determined freely, when used as a friction roller or the same pulley, the optimum usage condition can be guaranteed.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a friction rotating body manufactured by a manufacturing method of the present invention.

FIG. 2 is a perspective view showing an example of a metal disk that constitutes the body of the rotating body.

FIG. 3 (A) is an explanatory view showing a state where metal discs are arranged at regular intervals in a mold, and FIG. 3 (B) is a synthetic resin material in a space defined between the metal discs. It is explanatory drawing which shows the state filled with.

FIG. 4 is an enlarged explanatory view of a main part showing a state in which a synthetic resin layer is contracted.

[Explanation of symbols]

 1 Metal Disk 2 Concavo-convex Shape 3 Spacer 4 Synthetic Resin Layer 4a Synthetic Resin Material 5 Space 6 Mold

Claims (1)

[Claims] 1. A plurality of metal discs having a concavo-convex shape on the entire outer peripheral surface and arranged at intervals in the axial direction of the rotating body main body, and in a space defined between the metal discs. A manufacturing method for manufacturing a friction rotating body having a small-diameter synthetic resin layer interposed, wherein a metal disk having the above-mentioned concavo-convex shape is formed by press working, and each metal disk is fixed in a mold. After arranging at intervals, the space defined between the metal disks is filled with a synthetic resin material, and the synthetic resin layer is molded with the synthetic resin material. A method of manufacturing a friction rotating body.