| 摘要 |
A popular-priced roller is provided to minimize frictional resistance due to contact between a wheel and a separation preventing ring or a sleeve by forming ring grooves on both sides of the wheel. A popular-priced roller(R) includes a wheel(10), a separation preventing ring(20), and a sleeve(30). The wheel has a shaft contact part(13) formed on the inner peripheral surface of a shaft hole(11). The sleeve has an internal space(31), a fixing part(33), a ring protrusion(35), a support part(37), and a riveting part(38). The fixing part is in contact with a side surface of the wheel. The ring protrusion is formed at the opposite side to the fixing part, coupled with the separation preventing ring, and has a width(l4) corresponding to a thickness(l2) of the separation preventing ring. The support part is located between the fixing part and the ring protrusion and has a length(l3) corresponding to a length(l1) of the shaft contact part and an outer diameter corresponding to an inner diameter of the shaft hole. The riveting part is protruded around the ring protrusion. |
