| 摘要 |
The assembly (10) has rollers (14, 24) supported at frame elements (12, 22), where the roller (24) forms a gap with the roller (14). A tensioning unit (42) e.g. spring, is arranged on a side of the gap and tensions the frame elements against each other. A rotary bearing comprises a shaft (48) at which a tappet (50) is fixed, where the frame element (12) is supported at the tappet. The shaft is rotatably supported against the frame element (22) so that the distance between the rollers is changeable by rotation of the shaft around a longitudinal axis. |
