Patent ID: 9714156
Date: 2017-07-25
CPC Classifications: B66B,G01B

Claim:
1. An apparatus for aligning guide rails in an elevator shaft, a lifting machinery moving an elevator car in a first direction upwards and downwards in the vertically extending elevator shaft being restricted by wall structures, the elevator car being guided by guide rails supported on the wall structures in the elevator shaft, wherein the apparatus comprises: a positioning unit extending horizontally across the elevator shaft in a second direction and comprising a first attachment mechanism movable in the second direction at each end of the positioning unit for supporting the positioning unit on the opposite wall structures or other support structures in the elevator shaft; and an alignment unit extending across the elevator shaft in the second direction and being supported with support parts on each end portion of the positioning unit so that each end portion of the alignment unit is individually movable in relation to the positioning unit in a third direction perpendicular to the second direction, and comprising a second attachment mechanism movable in the second direction at each end of the alignment unit for supporting the alignment unit on opposite guide rails in the shaft, said second attachment mechanism comprising a gripper for gripping on the guide rail, whereby opposite guide rails can be adjusted in relation to each other and in relation to the elevator shaft with the apparatus.