Telescoping Roofing Panel Lifter with Gravity-Adjusted Shackles
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Solution Overview
Problem
The increasing length of metal panels used in roofing and siding poses challenges in stability and bending during lifting, leading to safety issues and potential damage to the panels.
Innovation Solution
An apparatus featuring a shelf with telescoping extensions and a frame with risers and extension members, where shackles are mounted at the center of gravity to maintain the apparatus level, allowing for safe lifting of elongated objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If panel length is increased to reduce construction time and seams, then productivity and aesthetics are improved, but stability and bending control during lifting deteriorate
Solution Approach 1:
The lifting apparatus divides the long panel into multiple supported sections using a multi-point lifting system. Instead of lifting at a single central point which causes bending, the system uses multiple lift points distributed along the panel length, effectively segmenting the load and maintaining panel stability during lifting.
Solution Approach 2:
The apparatus employs adjustable and extendable lifting arms that can be dynamically positioned along the panel length. The arms can be extended or retracted to match different panel lengths, and their positions can be adjusted to optimize weight distribution and prevent bending during the lifting process.
2Ease of operation
If magnets are used to lift panels at two points to reduce bending, then lifting effectiveness is improved, but reliability deteriorates due to inability to work with aluminum panels and safety concerns
Solution Approach 1:
The invention replaces the magnetic lifting system with a purely mechanical lifting apparatus. Instead of using magnets that require ferromagnetic materials, the system uses mechanical arms with contactless or minimal-contact lifting mechanisms that can safely handle all panel materials including aluminum, steel, and other non-magnetic materials without safety concerns about panel damage or worker safety.
3Device complexity
If a central cable is used to lift panels, then device complexity is reduced, but harmful factors increase due to panel bending and folding
Solution Approach 1:
The lifting system segments the single central cable approach into multiple distributed lifting points. By using several cables or lifting arms positioned at different locations along the panel, the system distributes the lifting force to prevent excessive bending and folding at any single point, thereby eliminating the harmful effects while maintaining operational simplicity.
4Adaptability or versatility
If telescoping extensions are added to accommodate longer panels, then adaptability is improved, but device complexity increases
Solution Approach 1:
The telescoping extensions are designed with a nested structure where smaller sections are housed within larger sections. This allows the lifting apparatus to compactly store multiple extension lengths within a single device, accommodating various panel lengths from 20 to 100 feet without requiring entirely separate apparatus for each length, thus managing complexity through space-efficient design.
Data Source
AI summary
An apparatus for lifting elongated objects includes a shelf that is elongated, and a frame connected to a lengthwise edge of the shelf for lifting the shelf and any panels that are resting on the shelf. The frame includes risers affixed to the shelf and extension members that extend from the risers over the shelf. Shackles are mounted to the extension members at a location (center of gravity) that keeps the apparatus for lifting elongated objects substantially level when lifted by cables attached to the shackles. Telescoping extensions at each end of the shelf provide for lifting longer elongated objects (e.g., the shelf is 30 feet long when the telescoping extensions are retracted and 50 feet long when the telescoping extensions are completely extended, providing for lifting very long elongated objects (e.g., 100 foot long or greater elongated objects).