PASSENGER CONVEYING DEVICE WITH STEP CHAIN GUIDED BY TRACK ROLLERS AND BUFFER ROLLERS, AND METHOD FOR GUIDING A STEP CHAIN USING TRACK ROLLERS AND BUFFER ROLLERS

摘要

The present invention relates to a passenger conveying device comprising endless step chains (4), which comprise a plurality of chain links that are movable relative to each other, and buffer rollers (6) disposed inside the chain links and track rollers (7) disposed outside the chain links; sprockets (8) for driving and deflecting the step chains (4), wherein when the buffer rollers (6) drive the step chains (4) they temporarily engage one of the sprockets (8); and further comprising first running surfaces (9) on which roll the track rollers (7) of the driven step chains (4), each of the first running surfaces (9) being disposed and dimensioned in such a way that they guide the track rollers (7) of the step chains (4) between the sprockets (8) driving a step chain (4); and second running surfaces (10) on which roll the buffer rollers (6) of the driven step chains (4), each of the second running surfaces (10) being disposed and dimensioned in such a way that they guide the buffer rollers (6) of the step chains (4) at least when they engage the corresponding sprocket (8). The present invention further relates to a method for guiding an endless step chain (4) driven by sprockets (8).