Formwork Lifting Device Leaf Spring Tilting Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing solutions for lifting concrete formwork devices, which involve complex and costly gantries with additional articulations, are inefficient in preventing tilting and resulting bending forces during lifting, leading to increased production complexity and costs.
Innovation Solution
A lifting device utilizing leaf springs that flex towards each other, integrated with a double articulated parallelogram and sliding suspension, allows for tilting of gantries without inducing bending forces, achieved through a simpler and more economical design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional articulation joints are added to the gantry base to allow tilting during lifting, then the gantry can tilt towards each other without inducing bending forces in the portal frames, but the complexity of producing the gantries increases and the cost rises
Solution Approach 1:
The invention extracts the tilting function from the gantry structure itself and transfers it to the connecting means (leaf springs) that join the lifting members to the formwork device upper edges. This allows the lifting members to tilt independently without requiring complex articulation joints in the gantry base, thereby maintaining reliability while reducing production complexity
Solution Approach 2:
The leaf springs serve as an intermediary element between the lifting members and the formwork device upper edges. These flexible connecting means absorb the tilting motion and prevent the transmission of bending forces to the portal frames, achieving the same protective function as additional articulation joints but with a simpler implementation
2Adaptability or versatility
If additional articulation joints are added to the gantry base, then the gantry can tilt towards each other during lifting, but the production cost of the gantries increases
Solution Approach 1:
The tilting capability is extracted from the gantry structure and assigned to the leaf spring connecting means. This allows the gantry to adapt to tilting during lifting without requiring expensive additional articulation joints, thereby maintaining versatility while improving ease of manufacture
Solution Approach 2:
The invention changes the physical state of the connecting means from rigid to flexible by using leaf springs. This parameter change allows the connecting means to accommodate tilting motion naturally, providing the same adaptability as articulated joints but at lower production cost
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 solution enables reliable and cost-effective tilting of gantries during lifting, maintaining stability and reducing bending stresses on frames, with automatic return to the rest position, thus simplifying and reducing the production costs.
Implementation Method 1
said connecting means comprise a leaf spring(s) comprising at least one leaf spring adapted to flex towards the other of said points
Data Source
Figure 1~3
Figure 4~6
AI summary
The device has rigid lifting elements e.g. rods, connected by its base to a point spaced from a load e.g. formwork device (1A). A connection unit for connecting each lifting element to the point is utilized to allow inclination of one of the lifting element toward the other lifting element in a vertical plane defined by the point. The connection unit comprises leaf springs provided with a spring leaf utilized to bend the leaf springs with respect to each other. An independent claim is also included for a formwork device assembly comprising formwork devices whose upper edges are connected by lifting devices.