Formwork Connecting Device Single-Operator Gravity Retraction
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Solution Overview
Problem
Existing formwork connecting devices are complex, expensive, and difficult to maneuver, requiring two operators and additional hooks for reliable operation, which can be damaged and pose safety risks during handling and storage.
Innovation Solution
A connecting device utilizing gravity and geometry to move a support prop between plug-in and retracted positions without additional hooks, using a pivot pin with a radial section for secure engagement and a locking mechanism for easy assembly and disassembly, allowing single-handed operation by a single operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hook is used to maintain the second part in the retracted position, then the reliability of the connecting device is improved, but the device complexity and cost increase
Solution Approach 1:
The patent removes the hook from the connecting device structure. Instead of using a separate hook component to maintain the retracted position, the invention uses the geometry of the plug-in section and housing themselves to achieve the same function, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The plug-in section and housing are designed to automatically maintain the retracted position through their geometric configuration without requiring additional active components. The structure itself provides the maintaining function, making the system self-sufficient and eliminating the need for separate maintaining mechanisms
2Reliability
If a hook is used to maintain the second part in the retracted position, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
By removing the hook entirely, the patent eliminates the operational difficulties associated with maneuvering a distant, inaccessible component under heavy load. The simplified structure allows direct manipulation of the plug-in section itself, dramatically improving ease of operation while single-handed operation becomes feasible
Solution Approach 2:
The geometric design of the plug-in section and housing enables the operator to directly manipulate the connection state without needing to reach for separate maintaining components. The structure guides the operator's actions and provides tactile feedback, making operation intuitive and easy to perform with one hand
3Reliability
If a complex connecting device with multiple components is used, then the reliability is improved, but the cost increases
Solution Approach 1:
The patent eliminates unnecessary components such as the hook and complex locking mechanisms, retaining only the essential plug-in section and housing. This component reduction directly lowers manufacturing costs while the optimized geometric design maintains functional reliability
Solution Approach 2:
The patent combines multiple functions into the basic plug-in section and housing structure itself. The same geometric features that enable connection also provide positioning, maintaining, and guiding functions, eliminating the need for separate components and reducing overall manufacturing 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 simplifies and strengthens the formwork assembly process, reducing operational complexity and costs, enhancing safety and reliability by enabling single-operator handling and easy storage, while minimizing the risk of accidental separation or damage.
Implementation Method 1
A connecting device according to the invention makes use of gravity and the geometry of the first and second parts to move the second part (8) connected to the support prop (3) from its initial position towards its retracted position
Data Source
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AI summary
Connection device (4) for connecting a support prop (3) to a formwork structure (2) defining a formwork plane (P), comprising: - a first part (5) including a plugging housing (7) extending along a first direction (II) intended to be oriented substantially perpendicular to the formwork plane (P), - a second part (8) including a plugging section (10) extending along a second direction (II-II), provided with a lateral surface (10c), and adapted to be articulated with the first part (5) pivoting about a third direction (III-III) substantially perpendicular to the first direction (II).The third direction (III-III) is defined by a pivot axis (11) carried by the first part (5), while the plugging section (10) has an oblong slot (12) extending along the second direction (II-II) between a first end (12a) and a second end (12b) and adapted to receive the pivot axis (11). In an assembled state, the second part (8) is movable relative to the first part (5) between at least three positions, namely a plugging position, a retraction position, and a retracted position. In the retracted position, the plugging section (10) bears with its lateral surface (10c) against a lower edge (13) of the plugging housing (7), to keep the pivoted second part (8) away from the first direction (II).