Cable tensioning device for elevators

A cable tensioning system for elevators including an elevator cabin, a counterweight, drive and support cables connecting the elevator cabin and the counterweight, and a drive mechanism including a drive disc for driving the drive cable and located below the elevator cabin, said cable tensioning system comprising:

• a support point attached to one of said elevator cabin and said counterweight;
• a rocker configured as a one sided lever and attached at said support point and having a first attachment point, at which the support cable is attached, and a second attachment point, at which the drive cable is attached, said first and second attachment points being horizontally spaced from said support points a first distance and a second distance, respectively, a ratio of the second distance to the first distance defining a force ratio required for maintaining driving ability of the drive cable;
• wherein the drive cable extends downwards from said rocker;
• wherein said support point is located outside of said first and second attachment points, said first attachment point is located on a first peripheral section of said rocker and said second attachment point is located on a second peripheral section of said rocker;
• and
• wherein said first and second peripheral sections of said rocker are arc-shaped and have radii corresponding to said first and second distances, respectively.