Resin rotational body and method for producing same

Abstract

Disclosed is a resin rotational body (1) configured by a ring-shaped resin ring (2), and a metal bush (3) fitted to the inner peripheral surface (2a) of the resin ring, wherein the metal bush is provided on its outer peripheral surface with a projection (3a) functioning as a rotation preventing means for connecting the resin ring and the metal bush while preventing mutual rotation. The resin ring is formed by thermal-compressing a blank body which is formed by laminating a plurality of resin sheets produced by a paper making process in the axial direction, and which is formed so that the diameter of its inner peripheral surface becomes substantially identical to the diameter of the outer peripheral surface of the metal bush, and the metal bush is integrally connected to the resin ring by press fitting the bush to the inner peripheral surface of the blank body along the axial direction. The projection of the metal bush is provided at a position forward biased in the press-fitting direction of the metal bush from the center in the axial direction of the metal bush. Provided is a resin rotational body which can be produced by simple steps, and can prevent the occurrence of dropping of the resin ring from the metal bush.

Description

technical field [0001] The present invention relates to a resin rotating body and a manufacturing method thereof, in particular to a resin rotating body provided with a rotation preventing mechanism for coupling a resin ring and a metal bush on the outer peripheral surface of a metal bush in a non-rotating manner, and its method of manufacture. Background technique [0002] Conventionally, a resin rotating body is known, which is composed of an annular resin ring and a metal bushing fitted on the inner peripheral surface of the resin ring, and is provided on the outer peripheral surface of the metal bushing so as to couple with each other so as not to rotate. Rotation preventing mechanism of resin ring and metal bushing (Patent Documents 1 to 4). [0003] Among them, Patent Documents 1 and 2 disclose a method of manufacturing a resin rotating body. A metal bush is arranged inside a molding die, and two rotation preventing mechanisms are arranged so as to sandwich the metal ...

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Problems solved by technology

[0010] However, in the case of Patent Documents 1 to 4, the metal bushing and the fiber must be placed inside the molding die, and the fiber must be impregnated with resin, and there is a problem that the structure of the molding die becomes complicated and the process is cumbersome.

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