Roof Shingle Stripper Pneumatic Lift Plate Roller
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Solution Overview
Problem
Existing roof shingle stripping devices are labor-intensive, prone to shingles falling back onto the newly stripped roof, heavy, and suffer from wear at the pivot point, posing safety and efficiency issues.
Innovation Solution
A power-operated roof stripping apparatus with a handle, pivotally connected lift plate, and roller fulcrum, featuring a pneumatic actuator and toggle linkage for efficient shingle lifting, a curved shingle guide to direct removed shingles away, and a cushioning spring for user comfort, along with a roller to reduce wear and facilitate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pneumatic lifting/prying tool is used to strip shingles, then the labor-intensive task is eased, but the stripped shingles fall back down onto the newly stripped roof section requiring the user to clear them away
Solution Approach 1:
A curved shield is introduced as an intermediary component between the lifting blade and the roof surface. This shield intercepts the stripped shingles and directs them away from the newly stripped roof section, preventing them from falling back down and requiring manual clearance.
Solution Approach 2:
The curved shield converts the harmful effect of shingles falling back onto the roof into a beneficial outcome by directing them to the side. The shingles that would otherwise be a hazard are now channelled away from the work area, eliminating the need for the user to clear them manually.
2Extent of automation
If the pneumatic lifting/prying tool is used, then shingle stripping is automated, but the device is relatively heavy and must be carried by a user around the rooftop
Solution Approach 1:
The manual mechanical lifting action is replaced with a pneumatic system. A pneumatic cylinder with piston replaces the manual lever mechanism, providing automated lifting power. This substitution enables the device to be lighter while maintaining the capability to strip shingles effectively.
3Productivity
If the pneumatic lifting/prying tool is used repeatedly, then shingle stripping is efficient, but the pivot point on the bottom the lifting plate wears down
Solution Approach 1:
A roller is introduced as an intermediary component between the lifting plate and the roof surface. This roller serves as the pivot point, replacing the flat plate surface that was previously subject to wear. The roller distributes the contact forces and reduces friction, significantly improving wear resistance while maintaining efficient shingle stripping.
4Device complexity
If a shovel-like prying hand tool is used to strip shingles, then no additional components are needed, but the process is very difficult and time-consuming
Solution Approach 1:
The manual mechanical action of a hand tool is replaced with a pneumatic system. The pneumatic cylinder provides automated lifting force, dramatically increasing the speed of shingle stripping. While the device is more complex than a simple hand tool, the automation compensates for the added complexity by eliminating the time-consuming manual prying process.
Data Source
AI summary
An apparatus for removing roof shingles includes an elongated body having a handle at its upper end and a lift plate pivotally connected to its lower end. The lift plate includes a removable blade at its leading edge and a roller that parallels the leading edge. The lift plate is linked to a pneumatically powered actuator that causes the lift plate to pivot about the roller upon the activation of a trigger mounted in the handle. The handle both rotates around the body and is movable linearly along the body against a biasing compression spring.