Shape-Retention Hoisting Bag With Diagonal Base Bands
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Solution Overview
Problem
Conventional large rectangular sand bags with sides over 1 meter become unstable and deformed when stacked or carried, requiring additional truss bands to maintain shape, which complicates handling and stacking.
Innovation Solution
A shape-retention-type hoisting rectangular parallelepiped bag design featuring base bands along diagonal lines, a quadrangular-prism-shaped lift band, and multiple truss bands with upper and lower hoisting rings, allowing for staged compression and improved friction to maintain the bag's shape, even when large.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bag size is increased to cover larger areas, then the work coverage area is improved, but the bag becomes unstable and deformed when stacked or carried
Solution Approach 1:
The bag is divided into multiple structural segments: base bands along diagonal lines, quadrangular-prism-shaped lift bands, and multiple truss bands arranged in stages. This segmentation allows each component to independently contribute to shape maintenance while accommodating larger overall bag dimensions, preventing deformation during stacking and handling.
Solution Approach 2:
The invention introduces a vertical dimension to shape maintenance by using quadrangular-prism-shaped lift bands that extend vertically from the base bands. This vertical structural element provides additional support against gravitational forces, enabling large-area bags to maintain their rectangular shape when stacked or carried without deformation.
2Stability of the object's composition
If additional truss bands are added to maintain bag shape, then the shape stability is improved, but the device complexity increases
Solution Approach 1:
The truss bands are arranged in multiple stages that can be dynamically adjusted or configured as needed. The quadrangular-prism-shaped lift bands provide a flexible vertical structure that works in conjunction with the truss bands, allowing the system to adapt to different bag sizes and loading conditions without requiring a fixed, overly complex arrangement of truss bands.
Solution Approach 2:
The base bands and lift bands serve multiple functions: they provide structural support, maintain shape, and facilitate handling. The quadrangular-prism-shaped lift bands act as both vertical supports and attachment points for truss bands, reducing the need for separate dedicated components and simplifying the overall structure.
3Quantity of substance
If the bag is filled with more soil to increase weight, then the load capacity is improved, but the friction between material and truss bands increases, causing deformation
Solution Approach 1:
The base bands and truss bands are pre-configured in specific geometric patterns before filling the bag with soil. This preliminary structural arrangement ensures that as soil is added, the friction forces are distributed evenly across the band system, preventing localized deformation while accommodating increased load capacity.
Solution Approach 2:
The invention optimizes the geometric parameters of the base bands and lift bands, including their spacing, orientation, and dimensions. By carefully selecting these parameters, the system achieves optimal friction distribution across the truss bands, allowing maximum soil quantity to be contained without causing deformation during handling or stacking.
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 stable stacking and handling of large sand bags without deformation, enhancing work efficiency in construction and disaster restoration by maintaining the rectangular shape and reducing the need for additional support structures.
Implementation Method 1
push up the inner material and generate sufficient friction between the material and the truss bands provided along the diagonal lines
Implementation Method 2
the soil inside the bag will be compressed and takes the rectangular parallelepiped shape
Data Source
Figure 1
Figure 2
Figure 3(A)~3(B)
AI summary
PROBLEMS: To provide a shape-retention-type hoisting rectangular parallelepiped bag which can be used as a sand bag in which soil can be packed down, and can be easily piled up while maintaining its shape. SOLVING MEANS: Base bands 24 are provided along diagonal lines of a rectangular parallelepiped bag 11 in a rectangular parallelepiped shape filled in with soil. A quadrangular-prism-shaped lift band 30 is secured to a point of intersection of the base bands 24. One end of a truss band 21 is secured by a fixing band 31 surrounding the quadrangular-prism-shaped lift band 30, and the other end thereof is secured to the base band at a point spaced apart by a given distance from the center of the lift band. In this way, a plurality of truss bands can be disposed on the lift band 30 in the vertical direction, thereby resolving a weight applied to a single truss band and maintaining the shape of the shape-retention-type hoisting rectangular parallelepiped bag 1. Accordingly, a plurality of the shape-retention-type hoisting rectangular parallelepiped bags can be stacked in order, thereby achieving a significant reduction of working hours.