| 摘要 |
An anchorage for a track, the anchorage having a roller member 38 having a stepped diameter with a larger diameter portion 40 for being received in the slots on the track and a smaller diameter portion 42 for engaging with the land portions of the track (see Figure 8). The track has regular aligned array of apertures with narrower portions, the anchorage having a base member with a plurality of elements projecting downwardly for engaging with the slot. The locking elements are standard locking elements 22 24. Preferably the rollers have one larger diameter and one smaller diameter portion or one larger flanked by two smaller diameters. An advanced locking element 34 may be situated between the roller and the locking element array to aid alignment, the advanced locking element being tapered or rounded in form. |
