| 摘要 |
The lock arrangement (80) comprises two lock or stop jaws (81, 82), with intermediate springs pressing the jaws away from each other towards a locking position. It has an upper and a lower stirrup arrangement (88, 89) which on moving towards each other move the lock jaws from a locking to a freeing position. The lock jaws, on deactivation of the lock function, move towards one another and somewhat downwards. Each lock jaw is provided with an edge part (81b) and a counterposed part provided with friction material. The upper frame part rail part is formed with freed side surfaces for the movement of the lock jaws. The friction material consists of a rubber material fixed to an aluminium surface. Each lock jaw is provided with an inner oblong hole. |
