| 摘要 |
<p>The fixing assembly has adjustable springs between the slot closure pieces and the winding bars. The slot closure pieces consist of upper wedges locating in recesses (6) in the edges of the slot and lower wedges (51). The upper and lower wedges form double wedges. The upper wedges adjoin one another with no gaps, with the exception of a gap formed by at least one shortened upper wedge. The force exerted by the springs is adjusted by sliding the upper wedges. The gap is central and may be produced by two shortened upper wedges. Fixed end wedges (4) are located at the ends of a slot.</p> |
