Gravity Chute Side Wall Friction Zones
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Solution Overview
Problem
Existing gravity chutes struggle to convey articles with different surface properties and friction characteristics without causing damage due to uneven acceleration and impact, as the angle of inclination must be set to accommodate the highest friction coefficient, leading to excessive speed and energy for articles with lower friction coefficients.
Innovation Solution
The gravity chute incorporates a side wall with varying friction properties in different regions, allowing for adjustable braking effects by altering the height and material of the side wall, ensuring that articles with different friction coefficients are conveyed gently and efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the angle of inclination of the chute is selected to accommodate the highest friction coefficient (e.g., plastic bags), then articles with high friction coefficients can reliably begin to move from rest, but articles with low friction coefficients (e.g., cardboard boxes) accelerate too rapidly and strike end stops with high impact energy causing damage
Solution Approach 1:
The side wall is divided into multiple regions with different friction properties. The first region (lower part) has first friction properties while the second region (upper part) has second friction properties. This local differentiation allows the chute to provide different friction characteristics at different heights, enabling controlled braking for articles with low friction coefficients while maintaining reliable movement initiation for articles with high friction coefficients.
2Object-affected harmful factors
If active elements such as brake straps, variable inclinations, or brake flaps are used to control the speed of articles, then impact damage can be reduced, but considerable additional costs are incurred
Solution Approach 1:
The invention changes the friction parameter of the side wall by using different materials or surface treatments in different regions. This allows the chute to control the speed of articles through friction-based braking rather than requiring active mechanical elements like brake straps or variable inclinations, thereby reducing impact damage without incurring additional costs for complex active control systems.
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
This solution allows for controlled braking of articles with varying friction characteristics, reducing damage by maintaining similar sliding speeds across different packaging materials, thereby enhancing the conveying process without the need for costly active elements.
Implementation Method 1
the side wall (16), to which the conveying surface (15) runs at a transverse inclination, has first friction properties within a first region (17) extending from the conveying surface (15) to a height (h), and has second friction properties within a second region (18) extending above the height (h), which differ from the first friction properties
Data Source
AI summary
A gravity chute for articles, comprising a chute floor defining a conveying surface, wherein the conveying surface has a conveying angle of inclination pointing in a conveying direction, and comprising at least one side wall which laterally delimits the chute floor, wherein, in addition to the conveying angle of inclination, the conveying surface has a transverse angle of inclination directed transversely to the conveying direction and pointing to a side wall, wherein the side wall, to which the conveying surface runs at a transverse inclination, has first friction properties within a first region extending from the conveying surface to a height h, and has second friction properties within a second region extending above the height h, which differ from the first friction properties, the side wall being recessed within the first region with respect to the second region.