Roof Window Lifting Tool with Pivotable Support Stands
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Solution Overview
Problem
Existing lifting tools for roof windows are cumbersome and time-consuming to assemble/disassemble, requiring multiple parts and adjustments, which complicates their use on inclined roofs and increases the risk of worker injury during manual lifting.
Innovation Solution
A lifting tool with pivotable and releasable connection points between support stands, allowing for folding and adjustment to fit different roof inclinations, combined with a mounting strap and batten hooks for secure positioning, reduces the number of parts and simplifies assembly and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lifting tool uses telescopic adjustment to adapt to different window widths and roof angles, then the adaptability is improved, but the device complexity increases and assembly/disassembly becomes time-consuming
Solution Approach 1:
The lifting tool employs telescopic adjustment mechanisms that allow dynamic modification of the frame length and angle bar positioning. This enables the same device to adapt to various window widths and roof inclinations without requiring multiple specialized tools, thus improving adaptability while maintaining a relatively simple overall structure through standardized telescopic components.
Solution Approach 2:
The lifting tool is divided into separable components including the frame, cross bar, and support stands that can be independently adjusted and reconfigured. The telescopic sections are segmented into adjustable segments that can be extended or retracted to match different span requirements, allowing flexible adaptation without increasing overall device complexity.
2Adaptability or versatility
If the lifting tool uses telescopic adjustment with multiple connection points, then the adaptability is improved, but the loss of time during assembly and disassembly increases
Solution Approach 1:
The telescopic connection points incorporate quick-adjustment mechanisms that allow workers to change the frame length and angle bar positions rapidly without complex fastening operations. This dynamic adjustment capability reduces the time required to reconfigure the lifting tool for different window sizes and roof angles while maintaining full adaptability.
Solution Approach 2:
The telescopic sections are pre-configured with alignment features and standardized connection interfaces that guide proper assembly. This preliminary design of the connection mechanisms eliminates the need for precise manual alignment and reduces the number of adjustment steps required, thereby decreasing assembly and disassembly time while preserving adaptability.
3Adaptability or versatility
If the lifting tool is disassembled into many separate parts, then the adaptability is improved, but the ease of operation decreases due to difficulty in tracking parts
Solution Approach 1:
The lifting tool design integrates the angle bar into the support stand structure, creating a unified assembly that reduces the total number of separate parts. This merging of components maintains the ability to adapt to different configurations while simplifying the assembly and disassembly process, as fewer individual parts need to be tracked and managed by workers.
Solution Approach 2:
The support stands are designed as multi-functional components that serve both as structural supports and as mounting points for the cross bar. This universal design allows the same components to perform multiple functions throughout the assembly and disassembly process, reducing the number of specialized parts that need to be tracked while maintaining full configurability for different window types.
4Device complexity
If the lifting tool uses fixed connection points, then the device complexity is reduced, but the adaptability to different roof inclinations decreases
Solution Approach 1:
The angle bar incorporates a pivotable connection at its lower end that allows dynamic adjustment of the support stand angle relative to the roof surface. This single degree of freedom in the connection mechanism enables adaptation to various roof inclinations without requiring complex multi-axis adjustment systems, thus maintaining low device complexity while achieving high adaptability.
Solution Approach 2:
The pivotable connection point allows the support stand angle parameter to be changed according to the roof inclination. By enabling this single parameter adjustment at the critical connection point, the lifting tool can accommodate different roof angles without increasing overall device complexity, as the adjustment is achieved through a simple hinged connection rather than a complex mechanism.
Data Source
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AI summary
A lifting tool (1) for mounting and dismounting of a sash of a roof window in an inclined roof construction, said lifting tool (1) comprising two support stands (2) adapted to be placed on the roof at opposite sides of a mounted window frame of the roof window, each support stand (2) comprising a support base (3), a support leg (4), and an angle bar (5) which together forms a triangle with a connection point at each corner, a cross bar (6) which can be releasably attached between the support stands (2), and a winch (7) which can by mounted on the cross bar (6).