Lifting Bag Detachable Strap System for Stress Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lifting bags for hazardous or radioactive materials face design hurdles due to stress on the outer cover from lifting straps, uneven weight distribution, and complex sealing mechanisms, which can lead to deformation and increased stress on seams during lifting and transportation.
Innovation Solution
A lifting bag design featuring a detachable lifting strap system attached near the top portion, constructed from robust flexible fabric with a zipper closure and edge strip for easy loading and stress reduction, allowing the bag to be inverted over a frame for efficient loading and minimizing stress on the exterior surface during lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lifting straps are attached to the outer cover of the bag, then the bag can be lifted and transported, but stress is placed on the outer cover which can lead to deformation and increased stress on seams
Solution Approach 1:
A lifting loop system made of strong webbing material is attached to the bottom of the bag, serving as an intermediary between the lifting straps and the bag body. This distributes the lifting stress across multiple attachment points on the bottom, preventing concentration of force on the outer cover and seams.
Solution Approach 2:
The lifting system is divided into separate components: lifting loops attached to the bottom, side straps attached to the sides, and a top strap system. This segmentation allows each component to handle specific portions of the load, distributing stress away from the outer cover.
2Stability of the object's composition
If lifting straps encircle the bottom of the bag in an even rectangular grid, then weight is evenly distributed during lifting, but the bag is subject to torsional forces that the rectangular webbing support grid cannot sufficiently compensate for
Solution Approach 1:
The lifting loops are arranged in a pattern that includes corner loops and mid-side loops, creating an asymmetric distribution that better resists torsional forces. The side straps are attached at specific asymmetric positions on the bag sides to counteract twisting moments.
Solution Approach 2:
The lifting system incorporates three-dimensional spatial arrangement with loops at corners and midpoints of sides, creating a more robust geometric configuration that resists torsional deformation better than a simple rectangular grid.
3Reliability
If the bag employs a complex flap folding procedure to seal the bag, then the bag can be sealed, but the procedure is cumbersome and time consuming
Solution Approach 1:
The complex mechanical flap folding and tying system is replaced with a simple zipper closure mechanism. The zipper can be operated with minimal effort and time, while still providing reliable sealing of the bag.
4Ease of operation
If the lifting strap system is attached to the bag, then the bag can be lifted, but the attachment adds complexity to the bag construction
Solution Approach 1:
The lifting system is segmented into separate attachable components (bottom loops, side straps, top strap) that can be attached independently to the bag, simplifying the construction process compared to integrating a monolithic lifting system.
Solution Approach 2:
The lifting strap system is designed to be detachable and reconfigurable, allowing users to attach or remove straps as needed. This dynamic approach reduces construction complexity while maintaining lifting functionality.
Data Source
AI summary
A lifting bag having at least one side wall and a closed bottom forming an interior, the bag further having a closable top portion connected to the sidewall and adapted to close the interior of the bag. The opening is a single slit centered on the bag top and closable with a zipper. The lifting bag includes a sling coupled to the bag, generally through a edge strip positioned at ore near the top edge of the bag. The bag can be constructed from a single multilayered sheet. The bag is used in conjunction with a lifting strap system.