Elevator system having two shafts

An elevator system comprising:

• a first shaft in which an upper shuttle car is disposed above a lower shuttle car, wherein at least at times the upper and lower shuttle cars are fixedly coupled to one another and are only movable vertically upward and vertically downward together;
• a second shaft in which an upper distribution car is disposed above a lower distribution car, wherein the upper and lower distribution cars are movable vertically upward and vertically downward separately from one another, wherein the upper shuttle car and the upper distribution car each comprise a stopping point at an upper shuttle level, wherein the lower shuttle car and the lower distribution car each comprise a stopping point at a lower shuttle level, wherein the second shaft comprises:
• a first stop element that is configured to limit at least at times a driving range of the upper distribution car to the upper shuttle level and to a range vertically above the upper shuttle level, and
• a second stop element configured to limit at least at times a driving range of the lower distribution car to the lower shuttle level and to a range vertically below the lower shuttle level,
• wherein the first stop element and/or the second stop element are configured to be movable such that the first stop element and/or the second stop element are movable between a release position and a stop position, wherein in the release position the driving range of the upper distribution car or of the lower distribution car is not limited by the respective stop element, wherein in the stop position the driving range of the upper distribution car or of the lower distribution car is limited by the respective stop element via a mechanical contact with the respective stop element.