| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin pulley which can be reduced in weight and can avoid a concentration of stress to an offset load. <P>SOLUTION: The pulley 2 comprises: an outside-diameter side cylinder 4; an inside-diameter side cylinder 6; a connecting part 8 which connects the cylinders to the axial direction at a prescribed thickness T; and plurality of ribs 10 which are radially protruded to the peripheral face 8s of the connecting part in the axial direction with respect to the circumferential direction at a prescribed thicknesses, connected to the outside-diameter side cylinder at their outside-diameter sides, and connected to the inside diameter-side cylinder at their inside-diameter sides. Each rib has an outside-diameter side protruded end-face arc 14 and an internal-diameter side protruded end-face arc 16 which connect an internal peripheral face and an outside peripheral face by axially recessing a portion in which an axial protruded end face 10s is continuous to the internal peripheral face of the outside-diameter side cylinder and a portion in which the axial protruded end face is continuous to the external peripheral face of the inside-diameter side cylinder. The outside-diameter side protruded end-face arc is gradually lowered in its protrusion height from the peripheral face of the connecting part as progressing toward an inside-diameter side from an outside-diameter end, and the inside-diameter side protruded end-face arc is lowered in its protrusion height from the peripheral face of the connecting part as progressing toward the outside-diameter side from an inside-diameter end, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
