| 摘要 |
A roller including a casing (2) and a shaft (1) extending therethrough wherein at least one ball joint is provided between the casing and the shaft. At least one end member (3, 4) is arranged at one end of the casing (2) and mounted on the shaft (1). A ball joint is provided between the casing (2) and the end member (3, 4) or between the shaft (1) and the end member (3, 4). The ball joint preferably consists of an intermediate part (9, 12) mounted on a frustoconical bearing surface (6) of the casing. |
