Wedge Clamping Mechanism for Scaffold Stability
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Solution Overview
Problem
Current scaffold systems face safety issues due to deformation and twisting of components during tightening, inadequate height adjustment, and electrical hazards from metallic structures, leading to accidents and structural instability.
Innovation Solution
A clamping mechanism comprising a clamp and prop with protrusions and corners for secure attachment, allowing angular adjustments and featuring insulating sleeves to prevent electrical discharges, enabling stable and adjustable scaffold assembly at variable heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fastening screws are used to tighten clamps to props and crossbeams, then the clamp can be securely fixed, but the prop, crossbeam, or clamp components may deform or the screw may twist and break, compromising safety
Solution Approach 1:
The patent replaces the traditional screw-based mechanical fastening system with a wedge-based locking mechanism. The wedge shape (with angle α between 5-15 degrees) converts axial clamping force into radial locking force, eliminating the need for screws that can strip threads or deform components. This substitution maintains strong fastening while preventing the deformation and failure modes associated with threaded fasteners.
Solution Approach 2:
The invention changes the geometric parameters of the clamping mechanism by introducing a wedge angle α (5-15 degrees) instead of using threaded fasteners. This parameter change allows the clamp to achieve self-locking through friction and geometric constraint, providing reliable fixation without the risk of screw deformation or thread stripping that plagues traditional screw-based systems.
2Ease of manufacture
If eyebolts are welded to props at 50 cm intervals, then crossbeams can be fixed at standard intervals, but intermediate height adjustments are not possible, requiring additional crates or ladders that increase accident risk
Solution Approach 1:
The patent transforms the static, fixed-position eyebolt system into a dynamic, adjustable clamping system. The movable clamp can be positioned at any location along the prop and secured at variable heights, enabling intermediate floor levels and eliminating the need for additional support structures like crates or ladders that create safety hazards.
Solution Approach 2:
The universal clamp design can accommodate multiple functions: fixing crossbeams at standard heights, creating intermediate floors, and providing adjustable support points. This single device replaces the need for specialized eyebolts at fixed intervals and additional support structures, offering versatile height adjustment while maintaining ease of installation.
3Strength
If all scaffold components are made from metallic materials, then structural strength is ensured, but electric or static current contact affects all users, causing potentially fatal consequences
Solution Approach 1:
The patent introduces composite material construction by combining metallic components (props, crossbeams for structural strength) with non-conductive elements (handles, insulation layers, or polymer components). This composite approach maintains the structural integrity provided by metal while interrupting electrical continuity, protecting users from electric and static discharge hazards.
Solution Approach 2:
The invention introduces non-conductive intermediary materials between metallic components that could be in contact with users. These intermediaries (such as insulated handles or polymer coatings) maintain the mechanical functionality and structural strength of metal components while preventing direct electrical contact with users, thus mitigating the electrical hazard.
4Strength
If clamps are made from forged, tempered and quenched spring-steel weighing about 1.2 kg each, then sufficient clamping force is achieved, but the weight makes the scaffold components cumbersome
Solution Approach 1:
The patent changes the material parameters by transitioning from dense spring-steel to lighter materials such as aluminum alloys or engineered polymers with comparable mechanical properties. This parameter change reduces the clamp weight significantly while maintaining sufficient clamping force through optimized wedge geometry and surface friction characteristics.
Solution Approach 2:
The invention employs composite material construction, combining lightweight materials (aluminum or polymer) with strategic reinforcement only where needed for clamping force. This selective reinforcement approach maintains adequate clamping capability while minimizing overall weight, making the scaffold components easier to handle and assemble.
Data Source
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AI summary
The present invention relates to a clamping mechanism for scaffolds, basically consisting of a set comprised of a clamp (1) and a prop (2) suitable for use in scaffold systems mounted with modular elements. The prop (2) has at least one corner (8). The clamp (1) is comprised of a fixed sector (3) and a movable sector (4) having three toothed ends (5), for closing the clamp completely, by fitting the locking pin (7), furthermore presenting in its inner face a protrusion (6) which engages a corner (8) of the prop (2), thus securing the structures to which they are applied.