Sliding Hoist Platform for Side-Loading Construction Loads
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Solution Overview
Problem
Tower cranes and conventional retractable loading platforms in multi-floor building construction are inefficient, causing increased build time and cost, and lack side-loading capability, which hinders the efficient lifting and lowering of loads.
Innovation Solution
A hoist platform system comprising a master hoisting platform with an outer and inner frame that slides between retracted and extended positions, allowing for side-loading and unloading, and a slave loading platform with side-opening gates, enabling efficient load transfer between floors using a winch and sheave mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tower cranes are used to lift and lower building materials, then loads can be transported between floors, but build time and cost increase due to operational bottlenecks and requirements for skilled personnel and safe wind conditions
Solution Approach 1:
The system divides the load transfer function into multiple independent hoist platforms (master and slave platforms) that can operate simultaneously on different floors, segmenting the bottleneck into parallel operations rather than single sequential tower crane operations
Solution Approach 2:
The hoist platforms are equipped with self-contained hoisting mechanisms (winch and sheave) that enable autonomous load lifting and lowering without requiring external tower crane assistance, allowing platforms to service themselves and operate independently
2Adaptability or versatility
If conventional retractable loading platforms with framework structure are used, then platforms can be installed on different floors, but side loading and unloading are prevented when retracted inside floors
Solution Approach 1:
The platform design incorporates dynamic positioning capability where the hoist mechanism can be positioned at different locations (forwardly above the inner frame) to enable side loading from multiple directions, and the platform can be extended or retracted as needed for different loading scenarios
Solution Approach 2:
The system adds vertical dimension capability with the hoist mechanism positioned above the inner frame, allowing loads to be lifted vertically and then positioned for side loading, effectively adding a third dimension to the loading operation beyond traditional horizontal access
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces build time and cost by enabling efficient and flexible load transfer between floors, overcoming the limitations of tower cranes and conventional platforms by allowing side-loading and unloading, thus enhancing construction efficiency.
Implementation Method 1
a winch positioned rearwardly above the inner frame
Implementation Method 2
a sheave positioned forwardly above the inner frame
Data Source
AI summary
A master hoisting platform, comprising: an outer frame removably installable inside a floor of a multi-floor building under construction; and an inner frame slidable in the outer frame between a retracted position inside the floor and an extended position outside the floor; wherein the inner frame comprises a framework structure to mount a hoist comprising a winch positioned rearwardly above the inner frame, and a sheave positioned forwardly above the inner frame.