Roofer Anvil with Variable Chamfer Slope for Grip Safety
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Solution Overview
Problem
The existing anvil designs for roofers pose a risk of injury due to sharp edges from the chamfered upper longitudinal edge, which is used for gripping and cutting, leading to discomfort and potential harm during prolonged use.
Innovation Solution
The anvil features a modified design with a chamfer slope less than in the free end or connection zones in the gripping area, and optionally rounded edges, eliminating the sharp cutting edge in the grip zone, along with an ergonomic handle arrangement for improved comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the upper longitudinal edge of the horizontal branch is chamfered to facilitate cutting, then the cutting function is improved, but sharp edges are generated which increase the risk of injury to the roofer's hand during gripping
Solution Approach 1:
The patent applies different chamfer configurations to different zones of the anvil. The free end zone maintains a chamfered edge for cutting functionality, while the gripping zone features either a reduced chamfer slope or an interrupted chamfer to eliminate sharp edges. This local differentiation allows the anvil to simultaneously provide effective cutting capability and safe gripping surfaces in different areas.
2Object-affected harmful factors
If the chamfer slope is reduced or interrupted in the gripping zone, then the risk of injury is reduced, but the cutting edge profile is modified
Solution Approach 1:
The horizontal branch is divided into distinct functional zones: a free end zone with a full chamfer for cutting, a connection zone to the vertical branch, and a gripping zone with modified chamfer characteristics. This segmentation allows each zone to be optimized for its specific function without compromising the overall structure or other zones.
3Ease of operation
If the anvil is designed with a flat upper longitudinal edge in the gripping zone, then grip comfort is improved, but the chamfered edge necessary for cutting is removed from that zone
Solution Approach 1:
The anvil design implements local quality by providing a flat upper longitudinal edge specifically in the gripping zone for comfort, while maintaining the chamfered edge in the free end zone for cutting. This spatial differentiation of edge characteristics allows the anvil to fulfill multiple functions with optimized local features.
Data Source
AI summary
Anvil (1) for roofer in the shape of a T which can be inserted by the free end (3) of its vertical arm (2) into a roof framing element, the horizontal arm (4) of the T having from a rear end (41) towards the other front end (42) a zone (5) for gripping the anvil, a zone (6) for connecting to the vertical arm (2) and a free end zone (7), the vertical arm (2) being connected to the horizontal arm (4) on the side of the lower longitudinal edge (8) of the horizontal arm (4), the upper longitudinal edge (9), opposite the lower longitudinal edge (8) of said horizontal arm (4) being chamfered. The chamfer (10) of the upper longitudinal edge (9) of the horizontal branch (4) has, in at least part of the gripping area (5), a slope less than that of the chamfer in the free end area (7), or (6) of connection or is interrupted in said gripping area (5).