| 摘要 |
The shaft or shaft element (S) has a step tread (T) of a single-flight or two-flight step array. The step tread is fixed with a foot piece (F) in a sliding guide (5) of a shaft wall (1) oriented in parallel to the shaft axis interposed on stop collar (10). A safety element (E) is provided, which is a detent tongue (11) having counter-abutment surface (22) and impinged lateral to the sliding direction to an engaging position. The detent tongue extends parallel to the sliding direction and is arranged at a part of the step tread and the shaft or shaft element made of plastic or concrete. An independent claim is included for a step tread, which is made of plastic, and has a tread bar. |
