Method and an arrangement for installing elevator guide rails

An arrangement for installing guide rails into an elevator shaft, said arrangement comprising:

• a first hoist;
• a lifting frame glidingly supported on counter weight guide rails, arranged to move upwards and downwards in the elevator shaft with the first hoist, and configured to lift guide rail elements from a storage area;
• a second hoist;
• a third hoist, separate from the first and second hoists, and configured to lift the guide rail elements from the lifting frame, the third hoist including a gripping member;
• and
• an installation platform glidingly supported on car guide rails, and arranged to move upwards and downwards in the elevator shaft with the second hoist, the installation platform comprising:
• a robotic installation apparatus configured to drill holes and fasten support brackets to walls of the elevator shaft;
• a robotic guide apparatus configured to guide the gripping member of the third hoist to grip an upper end of the guide rail element lifted by the third hoist, and guide the guide rail element gripped by the gripping member into position;
• and
• an alignment tool,
• wherein:
• consecutive guide rail elements are joined and the guide rail elements are attached to the support brackets with the installation apparatus,
• opposite guide rail elements are aligned with the alignment tool based on plumb lines at each support bracket along a height of the guide rail element, and
• the support brackets are locked and thereby also the guide rail elements with the installation apparatus.