| 摘要 |
The set of steps leads up to a loft in a house. One of the side walls (2) is displaceable towards the other side wall (1). Each individual step (3) is longitudinally divided and the parts (5) are connected to each other at the centre by a horizontal axis.The steps are secured by joints partly to one side wall and partly to the other. On displacing one side wall towards the other the individual steps are pushed upwards about the axes. |
