A guide positioning method for hoisting and installing a prefabricated stair

By setting guide positioning plates and guide positioning jacks on the upper and lower platforms of the prefabricated stairs, and using diagonal braces and swing plates to form a limiting frame, the difficulties in bolt connection and shaking problems in the installation of prefabricated stairs were solved, and the convenient and accurate installation of prefabricated stairs was achieved.

CN118241889BActive Publication Date: 2026-07-10SHANXI NO 3 CONSTR ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI NO 3 CONSTR ENG
Filing Date
2024-05-17
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

During the installation of prefabricated stairs, when tower cranes are needed to assist in the hoisting, it is difficult to align the bolt through holes with the pre-embedded bolts. Furthermore, the prefabricated stairs suspended in the limited hoisting space are prone to swaying, which may cause them to collide with existing facilities.

Method used

Identical guide positioning plates are installed on the upper and lower platforms of the prefabricated staircase. Manual horizontal and vertical guide positioning jacks are provided. A rectangular limiting frame is formed by diagonal braces and swing plates to adjust the posture of the prefabricated staircase. Accurate installation is achieved by aligning the positioning steel bars with the pre-embedded bolts.

Benefits of technology

This enables convenient and accurate installation of prefabricated stairs, avoids bolt damage, simplifies tooling production, and reduces costs.

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Abstract

This invention discloses a guiding and positioning method for hoisting and installing prefabricated stairs, enabling convenient and accurate installation of the prefabricated stairs. Two identical guiding and positioning mechanisms are installed on the upper and lower platforms of the prefabricated stairs installation area. Each guiding and positioning plate is fixed with a manual horizontal guiding and positioning jack and a manual vertical guiding and positioning jack. A horizontal swing plate is installed on the guiding and positioning plate inside the horizontal guiding and positioning jack. A horizontal diagonal brace is hinged between the outer surface of the horizontal swing plate and the horizontal guiding and positioning jack. By manually operating the horizontal guiding and positioning jack, the horizontal swing plate is swung from an inclined state to a vertical state. By adjusting the attitude of the two horizontal and two vertical swing plates, the initial guiding and positioning of the prefabricated stairs suspended in the air is achieved. The tooling is simple to manufacture, easy to assemble and disassemble, and inexpensive.
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