Connecting and inserting guide rail of tensioning device at lower section of escalator

The utility model provides a connecting and inserting guide rail of a tensioning device at the lower section of an escalator. The connecting and inserting guide rail comprises an end part edge plate (7), an upper side edge plate (8) and a connecting and inserting guide rail assembly, wherein the connecting and inserting guide rail assembly is arranged between the end part edge plate (7) and the upper side edge plate (8) and comprises a connecting and inserting rail (2) which is connected to the end part edge plate (7) and a connecting and inserting plate (1) which is connected to the upper side edge plate (8), the side surface of the connecting and inserting rail (2) is provided with a notch along the self length direction, the connecting and inserting plate (1) is matched with the notch of the connecting and inserting rail (2) along the self length direction in a sliding way, the connecting and inserting plate (1) is provided with a long waist-shaped round hole along the self length direction, a rolling piece (4) which can roll relative to the long waist-shaped round hole is arranged in the long waist-shaped round hole, and the rolling piece (4) is connected to the end part edge plate (7). Compared with the prior art, the connecting and inserting guide rail provided by the utility model has the advantages that the situation that a step roller can smoothly run on the guide rail and cannot be separated from the guide rail can be ensured after the tensioning device is forwards or backwards pulled, and the running of a step chain can be more stable.