US Patent 11225398 Guide rail alignment method and arrangement

The current disclosure relates to a guide rail alignment method comprising attaching and aligning a first pair of elevator car guide rail sections in an elevator shaft and mounting a vertically moveable base between the guide rail sections. After the first pair of elevator car guide rail sections has been aligned, a target member comprising a target point is removably attached to a guide rail section, and a positioning light source able to produce a beam of collimated light is attached to the vertically moveable base, so that a beam of collimated light emitted in a predetermined direction by the positioning light source meets the target point of the target member. The position of the light source is then used to align a guide rail section of a second pair of guide rail sections. The current disclosure further relates to an elevator guide rail alignment arrangement.