Circumferential Handling Strap With Rigid Handle And Pad
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Solution Overview
Problem
Handling and lifting of large, heavy, box-shaped articles such as prefabricated windows are challenging due to their size and weight, often requiring two people to manage the load safely and efficiently.
Innovation Solution
A handling strap with a circumferential design featuring a buckle for adjustable tightening, a rigid handle with a pad for grip, and optional second pad for protection, allowing secure attachment and lifting of articles by distributing the weight effectively and preventing hand damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible strap is used to attach a handle to a heavy article, then the strap can conform to the article shape and provide flexibility, but the strap may slide around the article and the handle position becomes unstable
Solution Approach 1:
The pad is pre-positioned at a specific location on the strap (at the end furthest from the buckle) to create preliminary friction contact with the article surface. This pre-positioned friction element ensures that when the strap is tightened, the handle remains stable at the desired location without sliding, resolving the contradiction between strap flexibility and handle position stability.
2Strength
If a rigid handle is used to grip heavy articles, then the handle provides structural strength and grip stability, but the rigid structure may damage the handler's hand under heavy loads
Solution Approach 1:
The handle combines a rigid gripping part for structural strength with a separate padded section at the contact point with the user's hand. The pad is made of soft, cushioning material that absorbs pressure and prevents hand damage, while the rigid portion maintains grip stability. This local differentiation of material properties resolves the contradiction between strength and harm prevention.
3Force
If the handle is positioned far from the article center of gravity, then the handle provides better leverage for lifting, but the article becomes harder to balance and control
Solution Approach 1:
The handle position is made adjustable along the strap, allowing the user to dynamically reposition the handle according to the specific lifting task. For heavy loads requiring leverage, the handle can be positioned farther from the center of gravity. For balancing tasks, the handle can be moved closer to the center. This dynamic adjustability resolves the contradiction between lifting leverage and balance control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables single-person handling of heavy articles up to 75 kg by providing a secure grip and reducing strain, while the adjustable design accommodates various article sizes and shapes, and the pads enhance friction and protection.
Implementation Method 1
Friction, in part imparted by the pad, due to the tightness of the circumferential strap prevents the circumferential strap from sliding around the article
Data Source
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AI summary
A handling strap (1) for attaching a handle to a vertical face (35) of a heavy article such as a window or a packaging containing such window, comprising a circumferential strap (3) with a buckle (7) allowing the circumferential strap (3) to be releasably tightened around the article, a handle (13) fixedly fastened to the circumferential strap (3), and a pad (17) fixedly fastened to the circumferential strap (3) in the vicinity of the handle (13), wherein the handle (13) comprises a rigid gripping part (15).